Image recording device

The present invention relates to an image recording device that records an image on a sheet, and more particularly to an image recording device that can record an image on both sides of the sheet.

Conventionally, an image recording device capable of recording an image on both sides of a sheet has been known. Patent Document 1 discloses a double-sided image forming apparatus as an example of this type of image recording apparatus. In the double-sided image forming apparatus, the sheet sent out from the sheet supply unit is conveyed by a conveying roller to an image forming means composed of a photosensitive drum or the like. An image is recorded on the surface of the sheet in the image forming means. The sheet on which the image is recorded on the surface is switched back by the discharge roller on the downstream side of the image forming means. The switched back sheet reaches the transport roller again via the resupply transport path provided below the image forming means. The image is recorded on the back surface of the sheet by the image forming means in the same manner as when the image is formed on the front surface. After that, the sheet on which the image is recorded on both sides is discharged to the discharge tray by the discharge roller.

Further, the double-sided image forming apparatus includes an arm (hereinafter, referred to as a paper feed arm) provided above the sheet cassette for accommodating the sheet and rotatably provided in the vertical direction around a predetermined rotation axis. , It is provided at the end of the paper feed arm and is provided with a sheet supply roller that feeds out the sheet stored in the sheet cassette by rotating.

<p><patcit num="1"><text>Japanese Unexamined Patent Publication No. 2002-362766</text></patcit></p>

<p> In an image recording device capable of recording an image on both sides of a sheet such as the above-mentioned double-sided image forming device, the path from the resupply transfer path to the transfer roller or the image forming means is curved. Then, the curvature of this curved path needs to be reduced in order to reduce the transfer resistance of the sheet. However, when the curvature is reduced, the radius of curvature becomes large, so that the area occupied by the curved path inside the image recording device becomes large, and the image recording device becomes large.</p><p> Further, when the image recording device has a configuration in which the paper feed arm needs to be rotated to the retracted area above the sheet cassette when the sheet cassette is inserted and removed from the image recording device, the paper feed arm and the paper feed arm It is necessary to provide a retracted area between the image recording device and the resupply transport path located above the image recording device, which increases the size of the image recording device.</p><p> The present invention has been made in view of the above problems, and an object of the present invention is an image recording device capable of preventing an increase in size of the device while ensuring a small curvature of the transport path and a retracting area of the paper feed arm. Is to provide.</p>

<p>(1) The image recording device of the present invention includes a recording unit that records an image on a sheet, a tray provided below the recording unit, on which the sheet can be placed, and a tray that can be inserted and removed from the device. A first guide member forming a curved first transport path for guiding a sheet fed from the tray to the recording unit is rotatably provided between the recording unit and the tray, and the tip side is the tip side. An arm that rotates between a first posture that approaches the tray and a second posture in which the tip side is separated from the tray and retracts from the insertion / removal area of the tray, and an arm that is rotatably provided on the tip side of the arm. A sheet placed on the tray is rotatably provided between the first roller for supplying the sheet to the first transport path, the recording unit and the arm, and the image-recorded sheet is transferred to the first transport path. A second guide member that rotates between a third posture that forms at least a part of the second transport path for guiding and a fourth posture in which the tip side is closer to the recording unit side than the third posture. The area for the second guide member to take the third posture overlaps with the area for the arm to take the second posture, and when the arm takes the second posture, the second Take 4 postures.</p><p> In the above configuration, when the sheet is conveyed in the image recording device, the arm takes a first posture to supply the sheet placed on the tray to the first transfer path. At this time, the second guide member takes a third posture to form a part of the second transport path. When the tray is inserted and removed from the image recording device, the arm rotates in the second posture and retracts from the insertion / removal area of the tray. The area for the second guide member to take the third posture overlaps with the area for the arm to take the second posture, and when the arm takes the second posture, the second guide member takes the fourth posture. .. As a result, the third posture of the second guide member can be positioned within the rotation region of the arm.</p><p>(2) The rotation shaft of the arm is the same as the rotation shaft of the second guide member.</p><p> By making the rotation shaft of the arm and the rotation shaft of the second guide member the same, the area for providing the rotation shaft can be made common. Further, since the rotation region of the arm and the rotation region of the second guide member can be shared, it is possible to prevent the device from becoming large in size.</p><p>(3) The third guide member, which is projected above the second guide member toward the second guide member, and the second guide member, which is provided at a position facing the third guide member, is provided at a position facing the third guide member. 2 Further provided with a first accommodating portion in which the third guide member is accommodated in a state where the guide member is rotated to the fourth posture.</p><p> The second guide member forms a part of the second transport path in the third posture below the fourth posture. As a result, when the third guide member is not provided, the width of the second transport path formed by the second guide member becomes large in the vertical direction. Then, the sheet to be transported may swing in the vertical direction in the second transport path, and jam may occur. However, according to the above configuration, since the width of the second transport path in the vertical direction is reduced by the third guide member, it is possible to prevent the sheet from jamming in the second transport path.</p><p>(4) The third guide member is arranged at a position facing the central portion in the transport direction of the sheet of the second guide member.</p><p> When the third guide member is in the above position, the sheet transported on the second guide member is reliably transported along the upper surface of the second guide member.</p><p>(5) A plurality of the third guide members are arranged in a direction orthogonal to the sheet conveying direction of the second guide member.</p><p> For example, by arranging the third guide member at the end of the second guide member in the above direction, it is possible to cope with a large size sheet. Further, by arranging it near the center, it is possible to cope with a small size sheet. That is, with the above configuration, the third guide member can handle sheets of various sizes.</p><p>(6) On the mounting surface on which the sheet of the tray is placed, from both ends of the second direction orthogonal to the first direction in which the sheet is fed, with the side plates erected along the first direction. A bottom plate provided on the arm, which can come into contact with the side plate when the tray is inserted and removed from the device, and is pushed by the side plate in a direction in which the arm is rotated to the second posture. To be equipped.</p><p> With the above configuration, it is not necessary to newly provide a member for rotating the arm to the second posture.</p><p>(7) A first contact portion provided on the arm and in contact with the second guide member when the arm is rotated to the second posture, and an arm provided on the second guide member. When it is rotated to the second posture, it can come into contact with the first contact portion, and the first contact portion pushes the second guide member in the direction of being rotated to the fourth posture. It is provided with a second contact portion.</p><p> With the above configuration, it is not necessary to newly provide a member for rotating the second guide member to the fourth posture, so that it is possible to achieve both a thinner shape and a smaller curvature of the transport path.</p><p>(8) From the mounting surface on which the sheet is placed on the tray, the sheet can be erected along the first direction in which the sheet is fed, and can be moved along the above-mentioned mounting surface, and can be moved to the above-mentioned mounting surface. One or a pair of fourth guide members that can come into contact with the edges of the loaded seat, and the second guide member that is provided at a position facing the fourth guide member and can come into contact with the fourth guide member. It is further provided with a third contact portion.</p><p> When the second guide member has a thin plate shape, the central portion of the second guide member in the direction orthogonal to the sheet transport direction may be bent downward due to the weight of the second guide member and the sheet transport resistance. .. However, in the above configuration, the downward deflection of the second guide member is regulated by the fourth guide member, so that the sheet is stably transported.</p><p>(9) The second guide member includes a fourth contact portion that contacts the upper surface of the tray in the state of the third posture.</p><p> With the above configuration, the second guide member is supported by the tray. As a result, the position of the second guide member can be stabilized, and the transfer of the sheet in the second transfer path is stable. Further, since the load of the second guide member is not applied to the arm, the feeding of the seat by the first roller is not affected.</p><p>(10) An elastic member that urges the second guide member downward is further provided.</p><p> The second guide member is urged downward by an elastic member in addition to being supported by the tray. Therefore, the position of the second guide member can be more stable.</p><p>(11) A support member arranged above the second guide member and a cushioning member provided at a position facing the upper surface of the second guide member in the support member are further provided.</p><p> When the tray is inserted or removed from the image recording device, or when the image recording device is transported, the second guide member may collide with a support member that supports the upper recording unit due to its rotation. .. In the above configuration, since the support member is provided with the cushioning member, it is possible to prevent the second guide member from being damaged even when the above-mentioned collision occurs.</p><p>(12) The second guide member rotates in a fifth posture in which the tip side is separated from the recording unit in the third posture in a state where the tray is pulled out from the device.</p><p> When the second guide member takes the fifth posture, the second transport path is opened. Therefore, even if the sheet is clogged in the second transport path, the sheet can be easily removed.</p><p>(13) The second guide member is provided at a position facing the first roller on the surface on which the sheet is conveyed, and has an opening in which the first roller is housed when the arm is in the second posture. Further prepare.</p><p> With the above configuration, the arm can take a second position higher up. As a result, it is possible to prevent the device from becoming large in size.</p><p>(14) A fifth guide member provided in the first transport path and assisting the transport of the sheet in the first transport path, and an end portion of the second guide member on the downstream side of the second transport path. A second accommodating portion provided at a position facing the fifth guide member and accommodating the fifth guide member in the state where the second guide member is in the fourth posture is further provided.</p><p> When the second guide member is in the fourth posture, the fifth guide member provided in the first transport path can be retracted by the second accommodating portion provided in the second guide member. As a result, it is possible to prevent the device from becoming large in size.</p><p>(15) The second guide member further includes a second roller on the downstream side in the sheet transport direction, which rotates in an axial direction perpendicular to the second transport path and along the surface of the sheet to be transported. ..</p><p> When the sheet conveyed on the second guide member rushes into the first transfer path, a particularly large resistance is generated in the sheet. Therefore, the sheet comes into contact with the upper surface on the downstream side in the transport direction of the sheet of the second guide member. Therefore, by arranging the second roller at the position where the sheet comes into contact with each other, the transfer resistance can be relaxed and the sheet can be transferred smoothly.</p>

<p> In the present invention, the curvature of the second transport path is reduced to increase the radius of curvature of the transport path, and the arm secures a region in which the arm rotates between the first posture and the second posture. However, it is possible to prevent the device from becoming large.</p>

<figref num="1">FIG. 1 is a perspective view of the multifunction device 10 which is an example of the embodiment of the present invention.</figref><figref num="2">FIG. 2 is a vertical cross-sectional view schematically showing the internal structure of the printer unit 11.</figref><figref num="3">FIG. 3 is a perspective view of the paper cassette 78 and the support member 43.</figref><figref num="4">FIG. 4 is a perspective view of the paper cassette 78.</figref><figref num="5">FIG. 5 is a perspective view of the rotation guide member 70. FIG. 5A shows a state in which the rotation guide member 70 is viewed from diagonally below, and FIG. 5B shows the rotation guide member 70 obliquely. The state seen from above is shown.</figref><figref num="6">FIG. 6 is a vertical cross-sectional view showing the internal structure of the printer unit 11. FIG. 6A shows the state in which the rotation guide member 70 is in a transporting posture, and FIG. 6B shows the rotation guide member 70 in a transporting posture. The state of the retracted posture is shown.</figref><figref num="7">FIG. 7 is a vertical cross-sectional view of the rotation guide member 70 in a posture that is separated from the recording unit 24 rather than the transport posture.</figref>

Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate. It goes without saying that the embodiments described below are merely examples of the present invention, and the embodiments of the present invention can be appropriately changed without changing the gist of the present invention. In the following description, the vertical direction 7 is defined based on the state in which the multifunction device 10 is installed so that it can be used (the state in FIG. 1), and the side in which the opening 13 is provided is the front side (front) in the front-rear direction. 8 is defined, and 9 is defined in the left-right direction when the multifunction device 10 is viewed from the front side (front).

As shown in FIG. 1, the compound machine 10 is generally formed in a thin rectangular body, and an inkjet recording type printer unit 11 is provided at the lower part. The compound machine 10 has various functions such as a facsimile function and a print function. As a printing function, it has a double-sided image recording function for recording an image on both sides of a recording paper. The presence or absence of a function other than the print function is arbitrary. The printer unit 11 has a casing (housing) 14 having an opening 13 formed in the front surface, and a tray 20 (an example of a tray of the present invention) on which recording papers of various sizes (an example of a sheet of the present invention) can be placed. The paper feed cassette 78 (see FIG. 2) provided with) can be inserted and removed from the opening 13 in the front-rear direction 8. An operation panel 17 is provided on the upper part of the front surface of the multifunction device 10. The operation panel 17 is a device for operating the printer unit 11. The compound machine 10 operates based on the operation input from the operation panel 17.

[Configuration of printer unit 11] Next, the configuration of the printer unit 11 will be described with reference to FIG. In FIG. 2, the front side (right side of the paper surface) of the paper feed cassette 78 is not shown. The paper cassette 78 includes a tray 20 on which recording papers of various sizes can be placed, and a paper ejection holding unit 79 for holding recording papers on which images are recorded and ejected from the multifunction device 10.

The printer unit 11 picks up the recording paper from the tray 20 and feeds (feeds) the recording paper, and ejects ink droplets to the recording paper fed by the paper feeding unit 15 to output an image on the recording paper. It includes an inkjet recording type recording unit 24 (an example of the recording unit of the present invention) for recording, a path switching unit 41, and the like. The recording unit 24 is not limited to the inkjet method, and various recording methods such as an electrophotographic method can be applied.

[Transportation path 65] Inside the printer unit 11, a transport path 65 is formed from the tip of the tray 20 (the end on the rear side) to the paper ejection holding unit 79 via the recording unit 24. The transport path 65 is formed between a curved path 65A (an example of the first transport path of the present invention) formed between the tip of the tray 20 and the recording unit 24, and between the recording unit 24 and the paper ejection holding unit 79. It is divided into the output paper passage 65B.

The curved passage 65A is a curved passage extending from the vicinity of the upper end of the separation inclined plate 22 provided on the tray 20 to the recording unit 24. The curved path 65A is generally formed in an arc shape centered on the inner side of the printer unit 11. The recording paper fed from the tray 20 is guided to the recording unit 24 via the curved path 65A. The curved road 65A is partitioned by an outer guide member 18 and an inner guide member 19 facing each other at predetermined intervals. That is, the outer guide member 18 and the inner guide member 19 are examples of the first guide member of the present invention. The outer guide member 18 and the inner guide member 19, the upper guide member 82, the lower guide member 83, the upper inclined guide member 32, the lower inclined guide member 33, and the support member 43 (the support member of the present invention, which will be described later). Each of the examples) extends in the vertical direction of the paper in FIG. 2 (9 in the left-right direction in FIG. 1).

A transport roller 64 (an example of the fifth guide member of the present invention) is provided on the curved road 65A. The transport roller 64 is rotatably provided with the width direction of the curved path 65A as the axial direction so that the roller surface is exposed from the outer guide member 18 or the inner guide member 19. A plurality of transport rollers 64 are arranged in a row in the outer guide member 18 and the inner guide member 19 in a direction orthogonal to the curved path 65A. Further, the transport rollers 64 are arranged in a plurality of rows in the outer guide member 18 and the inner guide member 19 from the upstream side to the downstream side in the transport direction of the recording paper. The transfer roller 64 facilitates the transfer of the recording paper that comes into contact with the guide surface at the bent path 65A. That is, the transport roller 64 is provided on the curved path 65A and assists the transport of the recording paper on the curved path 65A. The fifth guide member of the present invention is not limited to a rotatable roller, for example, a roller that rotates by drive transmission from a drive source, or a rib that protrudes from the outer guide member 18 or the inner guide member 19 toward the curved path 65A. It may be.

The paper discharge path 65B is a straight passage extending from the downstream side of the recording unit 24 toward the first transport to the paper discharge holding unit 79. Here, the first transport direction refers to the direction in which the recording paper is transported along the transport path 65 (the orientation indicated by the alternate long and short dash line with an arrow in FIG. 2). The upstream side of the paper ejection path 65B is partitioned by an upper guide member 82 and a lower guide member 83 that face each other at predetermined intervals.

A branch port 36 is formed on the downstream side of the recording unit 24 in the direction of the first transport. At the time of double-sided image recording, the recording paper conveyed through the paper ejection path 65B is switched back on the downstream side of the branch port 36 and directed to the inverted transfer path 67 (an example of the second transfer path of the present invention) described later. Will be transported.

[Recording unit 24] The recording unit 24 is arranged above the tray 20. The recording unit 24 reciprocates in the direction perpendicular to the paper surface (main scanning direction) of FIG. A platen 42 for holding the recording paper horizontally is provided below the recording unit 24. In the process of reciprocating in the main scanning direction, the recording unit 24 ejects ink supplied from an ink cartridge (not shown) onto the recording paper conveyed from the nozzle 39 on the platen 42. As a result, the image is recorded on the recording paper.

A first transport roller 60 and a pinch roller 61 are provided between the front ends of the outer guide member 18 and the inner guide member 19 and the recording unit 24. The pinch roller 61 is arranged below the first transport roller 60, and is pressed against the roller surface of the first transport roller 60 by an elastic member such as a spring (not shown). The first transfer roller 60 and the pinch roller 61 narrowly hold the recording paper conveyed on the curved road 65A and feed it onto the platen 42.

A second transport roller 62 and a spur roller 63 are provided between the recording unit 24 and the rear ends of the upper guide member 82 and the lower guide member 83. These are also paired. Like the pinch roller 61, the spur roller 63 is pressed against the roller surface of the second transport roller 62. The second transfer roller 62 and the spur roller 63 hold the recording paper on which the image is recorded by the recording unit 24 and transfer it to the downstream side (paper discharge holding unit 79 side) facing the first transfer.

The first transfer roller 60 and the second transfer roller 62 are rotated by transmitting a rotational driving force from a transfer motor (not shown) via a drive transmission mechanism (not shown). The drive transmission mechanism is composed of planetary gears and the like, and the recording paper is conveyed in one direction (right side in FIG. 2) regardless of whether the transfer motor is rotated in the forward rotation direction or the reverse rotation direction. 1 Rotate the transport roller 60 and the second transport roller 62 in one rotation direction. The first transfer roller 60 and the second transfer roller 62 are intermittently driven during image recording. Therefore, the image is recorded on the recording paper while being fed with a predetermined line feed width.

[Paper feed unit 15] The paper feed unit 15 is for transporting the recording paper stored in the tray 20 toward the curved path 65A, and is a paper feed roller 25 (an example of the first roller of the present invention) and a paper feed arm 26 (an example of the first roller of the present invention). An example of the arm of the present invention) and a drive transmission mechanism 27 are provided.

The paper feed roller 25 picks up the recording paper placed on the uppermost side of the recording paper placed on the tray 20 and feeds it to the curved path 65A, and the tip of the paper feed arm 26 It is rotatably supported by the shaft. The paper feed roller 25 is rotationally driven when a rotational force is transmitted from an ASF (Auto Sheet Feed) motor (not shown), which is a drive source different from the transport motor, via a drive transmission mechanism 27. The drive transmission mechanism 27 is pivotally supported by the paper feed arm 26, and is composed of a plurality of gears arranged in a substantially straight line. The ASF motor is rotated in either forward or reverse rotation, and the paper feed roller 25 is rotated in the direction of feeding the recording paper to the curved path 65A by the rotation of the ASF motor.

A base shaft 28 is provided above the tray 20 and below the recording unit 24. The base end portion of the paper feed arm 26 is supported by the base shaft 28, and the paper feed arm 26 can be rotated around the base shaft 28 as a rotation center axis. Therefore, the paper feed arm 26 can move up and down so as to be in contact with and detach from the tray 20. Further, a force acts on the paper feed arm 26 in the direction of arrow 29 in FIG. 2 due to its own weight or an elastic force due to an elastic member such as a spring. Therefore, the paper feed roller 25 can be pressed against the upper surface of the recording paper housed in the tray 20. That is, the paper feed arm 26 in a state where the paper feed roller 25 is in pressure contact with the upper surface of the recording paper is in an approaching posture in which the tip side (the side of the paper feed roller 25) is close to the tray 20 (first aspect of the present invention). Take a posture).

As shown in FIG. 5A, the paper feed arm 26 is configured as a housing that covers the drive transmission mechanism 27 (see FIG. 2). Further, the lower surface 23 of the paper feed arm 26 (an example of the bottom plate of the present invention) covers not only the drive transmission mechanism 27 but also the right side portion from the center of the base shaft 28 in the left-right direction 9. As will be described below, the right end portion 23A of the lower surface 23 of the paper feed arm 26 can come into contact with the cam portion 57 provided on the side plate 55 of the tray 20, which will be described later.

When the tray 20 is pulled out from the printer unit 11, the right end portion 23A of the lower surface 23 of the paper feed arm 26 is pushed by the cam portion 57 provided on the side plate 55 of the tray 20 (an example of the side plate of the present invention). As a result, the paper feed arm 26 is rotated upward. The paper feed arm 26 in a state of being pushed up by the cam portion 57 is in a separated posture in which the tip side (the side of the paper feed roller 25) is separated from the tray 20 and retracted from the insertion / removal area of the tray 20 (second posture of the present invention). Equivalent to). From the above, the paper feed arm 26 rotates between the approaching posture and the separating posture. The direction in which the right end portion 23A of the lower surface 23 of the paper feed arm 26 is pushed by the cam portion 57 of the side plate 55 is the direction in which the paper feed arm 26 is rotated from the approaching posture to the separating posture.

On the opposite side of the lower surface 23 of the paper feed arm 26, the upper surface 21 of the paper feed arm 26 as a part of the housing constituting the paper feed arm 26 (an example of the first contact portion of the present invention, FIG. 6 (A) ) See). The upper surface 21 comes into contact with the rotation guide member 70, which will be described later, when the paper feed arm 26 is rotated from the approaching posture to the rotating posture.

[Paper cassette 78] The paper cassette 78 is provided below the paper feed unit 15. As shown in FIGS. 3 and 4, in the present embodiment, the paper feed cassette 78 includes a tray 20 on which recording papers of various sizes can be placed and a recording paper on which images are recorded and ejected from the multifunction device 10. Is provided with a paper ejection holding portion 79 for holding the paper. The tray 20 and the paper ejection holding portion 79 are arranged in two upper and lower stages with the paper ejection holding portion 79 on the upper side of the tray 20. When the paper cassette 78 is inserted and removed from the opening 13, the paper ejection holding portion 79 is also inserted and removed in addition to the tray 20. The paper ejection holding unit 79 may be configured separately from the paper feed cassette 78.

The tray 20 is erected from both ends of a bottom plate 54 (an example of a mounting surface of the present invention) on which recording paper is placed and a left-right direction 9 (corresponding to the second direction of the present invention) of the bottom plate 54 for recording. Side plates 55, 56 arranged along the front-rear direction 8 (corresponding to the first direction of the present invention) in which the paper is fed, and standing at the rear end of the bottom plate 54, along the left-right direction 9. It is provided with an arranged separation inclined plate 22. The tray 20 is formed in a substantially rectangular box shape with an open top surface.

A cam portion 57 is provided on the upper surface of the right side plate 55. The cam portion 57 is provided continuously with the first inclined surface 571 whose front side is higher than the rear side, the first inclined surface 571 behind the first inclined surface 571, and the second inclined surface 572 whose rear side is higher than the front side. It has a horizontal plane 573 provided continuously with the second inclined surface 572 behind the second inclined surface 572. The horizontal plane 573 is formed to almost the rear end of the side plate 55, and is about the same height as the upper end of the separation inclined plate 22. From the above, the height of the cam portion 57 from the bottom plate 54 changes along the front-rear direction 8.

When the tray 20 is inserted into the printer unit 11 or when the tray 20 is pulled out from the printer unit 11, the cam unit 57 comes into contact with the lower surface 23 of the paper feed arm 26. The cam portion 57 is slid back and forth by inserting and removing the tray 20. At this time, the height of the paper feed arm 26 changes depending on which surface 571, 572, or 573 of the cam portion 57 the paper feed arm 26 is in contact with.

The separation tilt plate 22 is tilted rearward so that the recording paper can be fed smoothly. As described above, the recording paper is conveyed from the rear end of the tray 20 to the curved road 65A behind and above the end.

A pair of side guides 77 (an example of the fourth guide member of the present invention) are erected on the bottom plate 54 of the tray 20 along the front-rear direction 8. One of the side guides 77 is slid along the bottom plate 54 in either of the left-right directions 9. In conjunction with this, the other of the side guides 77 is slid in a direction opposite to any of the above directions. Therefore, when the width of the recording paper placed on the bottom plate 54 is narrower than the separation distance between the two side guides 77, one side guide 77 is slid toward the recording paper to slide the other side guide 77. Are moved at the same time. As a result, the center position of the recording paper in the width direction (9 in the left-right direction) substantially coincides with the center in the width direction of the tray 20. That is, the side guide 77 can come into contact with the edge of the recording paper placed on the bottom plate 54. By sliding the side guide 77, recording paper of various sizes can be placed on the bottom plate 54 with the maximum size being the distance of 9 in the left-right direction between the side plates 55 and 56.

The number of side guides 77 provided on the bottom plate 54 of the tray 20 may be one. In this case, a recording sheet having a size corresponding to a distance of 9 in the left-right direction between the side guide 77 and any of the side plates 55 and 56 can be placed on the bottom plate 54.

The paper ejection holding portion 79 is configured to be rotatable upward of the tray 20 with the shaft 91 rotatably supported by the side plates 55 and 56 as the axial direction. That is, the paper ejection holding portion 79 is configured as a lid that can be opened and closed of the tray 20. When the paper ejection holding portion 79 is opened upward by the user while the paper feed cassette 78 is pulled out from the compound machine 1, the upper surface on the front side of the tray 20 is opened to expose the bottom plate 54. As a result, the recording paper can be placed on the tray 20 from the front side.

[Route switching unit 41] As shown in FIG. 2, the route switching unit 41 is arranged near the branch port 36 in the transport path 65. The route switching unit 41 includes a third transport roller 45, a spur roller 46, and a flap 49.

The third transport roller 45 is provided on the downstream side of the lower guide member 83. A branch port 36 is formed between the third transport roller 45 and the lower guide member 83. The third transport roller 45 is rotatably supported by a frame or the like of the printer unit 11. The spur roller 46 is arranged above the third transport roller 45, and a force is applied in a direction in which the spur roller 46 is pressed against the roller surface of the third transport roller 45 by its own weight or an urging force such as a spring. The spur roller 46 is rotatably supported by the downstream end of the upper guide member 82. The third transfer roller 45 is rotationally driven in the forward rotation direction or the reverse rotation direction by transmitting a driving force in the forward / reverse rotation direction from the transfer motor. For example, when single-sided recording is performed, the third transport roller 45 is rotated in the forward rotation direction. As a result, the recording paper is sandwiched between the third transport roller 45 and the spur roller 46, transported to the downstream side, and discharged to the paper discharge holding unit 79. On the other hand, when double-sided recording is performed, the rotation direction of the third transfer roller 45 is switched from the forward rotation direction to the reverse rotation direction with the third transfer roller 45 and the spur roller 46 sandwiching the rear end portion of the recording paper. Be done.

A support shaft 87 extending in the vertical direction of the paper surface (9 in the left-right direction in FIG. 1) of FIG. 2 is provided on the frame of the printer unit 11. The flap 49 extends substantially downstream from the support shaft 87. The flap 49 is rotatably supported by a support shaft 87. Auxiliary rollers 47 and auxiliary rollers 48 separated in the extending direction are pivotally supported on the flap 49. Since the roller surfaces of these auxiliary rollers 47 and 48 are in contact with the recording surface of the recording paper, they are formed in a spur shape like the spur rollers 63 and the spur rollers 46.

The flap 49 is configured so that the posture can be changed, and the discharge posture (the posture shown by the broken line in FIG. 2) located above the lower guide member 83 and the extension end portion 49A are below the branch port 36. It rotates with the inverted posture (the posture shown by the solid line in Fig. 2) that enters into. The recording paper that has passed through the recording unit 24 is further conveyed to the downstream side in the first transport direction when the flap 49 is in the discharge position, and is switched back to the reverse transfer path 67 when the flap 49 is in the reverse position.

[Reversal transport path 67] The reversing transport path 67 guides the recording paper from the downstream side of the transport path 65 in the first transport direction to the upstream side of the transport path 65 from the first transport roller 60 in the first transport direction. The reverse transfer path 67 is branched from the output path 65B at the branch port 36, passes below the recording unit 24 and above the paper feed arm 27, and is upstream of the recording unit 24 in the direction of the first transfer. It merges with the curved road 65A at the confluence 37. The recording paper is conveyed along the reverse transfer path 67 in the second transfer direction. Here, the second transport direction refers to the direction indicated by the alternate long and short dash line with an arrow in FIG. From the above, the reversing transport path 67 is a path for guiding the recording paper on which the image is recorded on at least one surface by the recording unit 24 to the curved path 65A.

The reverse transport path 67 is divided into a first path 67A and a second path 67B. The first path 67A is partitioned by an upper inclined guide member 32 having an inclined surface inclined backward obliquely downward from the branch port 36 and a lower inclined guide member 33. The upper inclined guide member 32 is integrally formed with the lower guide member 83. The upper inclined guide member 32 and the lower inclined guide member 33 are arranged so as to face each other with a predetermined interval through which the recording paper can pass. The upper inclined guide member 32 is arranged above the lower inclined guide member 33.

The second path 67B extends rearward from the vicinity of the end of the first path 67A in a substantially downward curve, and then curves upward just before the confluence 37. The second path 67B is attached to a rotation guide member 70 (an example of the second guide member of the present invention) rotatably supported in the direction of arrow 68 in FIG. 2 and a frame of the printer unit 11. It is arranged above the rotation guide member 70 and is partitioned by a support member 43 that supports the recording unit 24. As will be described later, the rotation guide member 70 can take a transport posture (corresponding to the third posture of the present invention) forming a part of the reverse transport path 67. The rotation guide member 70 and the support member 43 in the transport posture are arranged so as to face each other with a predetermined interval through which the recording paper can pass.

[Rotating guide member 70] The rotation guide member 70 is provided between the recording unit 24 and the paper feeding unit 15, that is, below the recording unit 24 and above the paper feeding unit 15.

As shown in FIGS. 5A and 5B, the rotation guide member 70 is a substantially thin flat plate rectangular member whose vertical direction 7 is shorter than the front-rear direction 8 and horizontal direction 9 dimensions. .. The rotation guide member 70 includes a first plate-shaped member 71 and a second plate-shaped member 72 integrally attached to the tip (rear end) of the first plate-shaped member 71. In the present embodiment, the first plate-shaped member 71 and the second plate-shaped member 72 are provided with ribs 73 in the front-rear direction 8 and the left-right direction 9 in order to supplement the weakness of rigidity due to the thinness. ing. The rotation guide member 70 may have a configuration in which the rib 73 is not provided.

The first plate-shaped member 71 and the second plate-shaped member 72 are attached at a predetermined angle so that the second plate-shaped member 72 faces upward from the first plate-shaped member 71 in the front-rear direction 8. As a result, as shown in FIGS. 2 and 6 (A), the first plate-shaped member 71, the second plate-shaped member 72, and the curved path 65A form a substantially arc-shaped path, and the inverted transport path is formed. The recording paper carried 67 is smoothly guided to the curved road 65A.

The base end portion (front end portion) of the first plate-shaped member 71 is supported by the base shaft 28 of the paper feeding unit 15, and the first plate-shaped member 71 can be rotated around the base shaft 28 as a rotation center axis. That is, the rotation shaft of the rotation guide member 70 is the same as the rotation shaft of the paper feed arm 26 of the paper feed unit 15. By being supported by the base shaft 28, the rotation guide member 70 can move up and down so as to approach and separate from the recording unit 24. As a result, the rotation guide member 70 has a transport posture that forms at least a part of the inverted transport path 67 by rotating, and a retracted posture in which the tip side approaches the recording unit 24 side rather than the transport posture (in the present invention). It is possible to take the 4th posture). The transport posture is a posture in which the upper surface of the rotation guide member 70 maintains a predetermined distance through which the support member 43 and the recording paper can pass, as shown by the solid line in FIG. 2 and FIG. 6 (A). Further, in the present embodiment, the first plate-shaped member 71 is slightly inclined downward in the direction from the rear end to the tip in order to minimize the curvature of the arc-shaped path. The retracted posture is a posture in which the upper surface of the rotation guide member 70 approaches the vicinity of the support member 43, as shown by the broken line in FIG. 2 and FIG. 6 (B). In the present embodiment, the rotation shaft of the rotation guide member 70 is the same as the rotation shaft of the paper feed arm 26 of the paper feed unit 15, but the rotation of the rotation guide member 70 and the paper feed arm 26. The moving shafts may be provided individually.

[Hole 90] A hole 90 (an example of an opening of the present invention) is provided at a position facing the paper feed roller 25 on the surface of the rotation guide member 70 on which the recording paper is conveyed. Specifically, as shown in FIGS. 2 and 5 (B), when the paper feed arm 26 is in the separated posture, at least a part of the paper feed roller 25 (for example, paper feed from the paper feed roller 25) A hole 90 is provided at the position of the rotation guide member 70 on which the roller surface above the arm 26) is arranged.

[Rotation of rotation guide member 70 and paper feed unit 15] The rotation guide member 70 is rotated to the retracted posture in conjunction with the rotation of the paper feed arm 26 to the separated posture. The rotation guide member 70 is rotated to the retracted posture by being pushed upward by the upper surface 21 of the paper feed arm 26 that is rotated to the separated posture. The upper surface 21 of the paper feed arm 26 is on the side opposite to the surface of the first plate-shaped member 71 on which the recording paper is conveyed, that is, the lower surface 74 of the first plate-shaped member 71 (an example of the second contact portion of the present invention, FIG. 5 (A)) can be contacted. The lower surface 74 of the first plate-shaped member 71 comes into contact with the upper surface 21 of the paper feed arm 26 when the paper feed arm 26 is rotated from the approaching posture to the separated posture. The lower surface 74 is pushed by the upper surface 21 in a direction in which the rotation guide member 70 is rotated from the transport posture to the retracted posture. As a result, the rotation guide member 70 takes a retracted posture when the paper feed arm 26 takes a separated posture. Further, the rotation guide member 70 rotates in a fifth posture (corresponding to the fifth posture of the present invention) in which the tip side is separated from the recording unit 24 rather than the transport posture in a state where the tray 20 is pulled out from the compound machine 10.

It will be described in detail below. As shown in FIG. 5A, a paper feed roller 25 and a paper feed arm 26, that is, a paper feed unit 15, are provided below the rotation guide member 70. In FIG. 6A, the paper feed unit 15 is in an approaching posture, and the rotation guide member 70 is in a transporting posture.

At this time, the paper feed roller 25 is in contact with the top surface or bottom plate 54 of the recording paper. The lower surface 23 of the paper feed arm 26 exists above the cam portion 57 of the tray 20. Specifically, the lower surface 23 is above the recess formed by the first inclined surface 571 and the second inclined surface 572, and exists at a position lower than the horizontal plane 573. That is, the lower surface 23 is in a state of being separated from the cam portion 57.

When the tray 20 is pulled forward in this state, the lower surface 23 abuts on the second inclined surface 572 and moves upward along the second inclined surface 572 as it is. As a result, the paper feed arm 26 is rotated upward and the paper feed roller 25 is lifted. That is, the paper feed unit 15 starts the posture change from the approaching posture to the separating posture.

When the paper feed unit 15 rotates upward by a predetermined amount, the upper surface 21 of the paper feed arm 26 comes into contact with the lower surface 74 of the first plate-shaped member 71 of the rotation guide member 70. At this time, since at least a part of the paper feed roller 25 is housed in the hole 90 of the rotation guide member 70, the paper feed roller 25 and the rotation guide member 70 do not come into contact with each other.

In this state, when the tray 20 is pulled out further forward, the paper feed unit 15 and the rotation guide member 70 rotate integrally upward due to the upward rotation of the paper feed unit 15 due to the fluctuation of the lower surface 23. That is, the rotation guide member 70 starts the posture change from the transport posture to the retracted posture. This rotation continues until the lower surface 23 climbs up the second inclined surface 572 and comes into contact with the horizontal plane 573 (see FIG. 6 (B)). In a state where the lower surface 23 is in contact with the horizontal plane 573, the feeding unit 15 is in a separated posture, and the rotation guide member 70 is in a retracted posture.

That is, by pushing the rotation guide member 70 upward, the paper feed arm 26 takes a separated posture in the region where the rotation guide member 70, which had been in the transport posture until then, was present. That is, the region for the paper feed arm 26 to take the separated posture and the region for the rotating guide member 70 to take the transport posture overlap.

In this state, even if the tray 20 is pulled further forward, the paper feed unit 15 maintains the separated posture while the lower surface 23 is in contact with the horizontal plane 573.

When the tray 20 is further pulled forward from this state and the horizontal plane 573 is pulled out to the front of the lower surface 23, the paper feed roller 25 is lowered. This is because the paper feed arm 26 is rotationally urged in the direction of arrow 29 in FIG. As a result, the paper feed unit 15 changes its posture from the separated posture to the posture rotated downward from the approaching posture.

Then, when the paper feed unit 15 changes its posture from the separated posture to the posture rotated downward from the approaching posture, the rotation guide member 70 also follows and is rotated to the fifth posture (see FIG. 7). This is because the rotation guide member 70 is supported by the tray 20 as described later, but is not supported by the tray 20 because the tray 20 is pulled out from the multifunction device 10.

In the above description, the case where the rotation guide member 70 is rotated to the retracted posture by being pushed upward by the upper surface of the paper feed arm 26 rotated to the separated posture has been described. If the motion guide member 70 rotates in conjunction with the insertion and removal of the tray 20, the configuration is not limited to this.

For example, the paper feed arm 26 and the rotation guide member 70 may be rotated by being driven and transmitted from a drive source (the above-mentioned transport motor, ASF motor, or a motor other than these). The drive sources of the rotation guide member 70 and the paper feed arm 26 may be the same or different.

This example will be described in detail below. In the case of this example, the transmission of the driving force to the paper feed arm 26 and the rotation guide member 70 is interlocked with the insertion / removal of the tray 20. When the tray 20 mounted on the multifunction device 10 starts moving forward in order to be pulled out from the multifunction device 10, the paper feed arm 26 and the rotation guide member 70 are driven and transmitted from the drive source to start rotation. To do. Then, the paper feed arm 26 is rotated from the approaching posture to the separating posture, and the rotation guide member 70 is rotated from the transporting posture to the retracting posture. When the rotation is completed, the drive transmission from the drive source is stopped. In this example, it is assumed that the paper feed arm 26 holds the separated posture and the rotation guide member 70 holds the retracted posture even when the tray 20 is pulled out from the multifunction device 10. In this state, the tray 20 that has been removed from the multifunction device 10 is inserted into the multifunction device 10, and when the insertion is completed thereafter, the paper feed arm 26 and the rotation guide member 70 are driven and transmitted from the drive source. Start moving. Then, the paper feed arm 26 is rotated from the separated posture to the approaching posture, and the rotation guide member 70 is rotated from the retracting posture to the transporting posture.

[Support for rotation guide member 70] When the rotation guide member 70 is in the transport posture, the rotation guide member 70 is supported by the tray 20. For example, as shown in FIGS. 5A and 5B, the first plate-shaped member 71 of the rotation guide member 70 has convex portions 711 and 712 (fourth contact of the present invention) at both ends in the left-right direction 9. An example of the part) is provided. Further, as described above, a horizontal plane 573 is provided at the upper end of the side plate 55 on the right side of the tray 20 of the paper cassette 78. A horizontal plane 574 is also provided at the upper end of the side plate 56 on the left side of the tray 20 (see FIG. 4). When the rotation guide member 70 is in the transporting posture, the lower surface of the convex portion 711 and the upper surface of the horizontal plane 573, and the lower surface of the convex portion 712 and the upper surface of the horizontal plane 574 come into contact with each other, whereby FIG. As shown in, the rotation guide member 70 is supported by the tray 20.

Further, the rotation guide member 70 is supported by the side guide 77 when it is bent by a predetermined amount in the transport posture. For example, the rotation guide member 70, which normally takes a transport posture, is located above the side guide 77. In this case, when the central portion of the rotation guide member 70 in the left-right direction 9 is located below both ends by a predetermined amount, that is, when a predetermined amount of bending occurs, the upper end 771 of the side guide 77 (see FIG. 4) , Of the ribs 73, the ribs 73A (an example of the third contact portion of the present invention) provided in the left-right direction 9 come into contact with each other. This prevents the rotation guide member 70 from bending more than a predetermined amount.

[Induction member 75] As shown in FIGS. 2 and 6, the multifunction device 10 has a guide member 75 (an example of the third guide member of the present invention) which is projected above the rotation guide member 70 toward the rotation guide member 70. ) Is provided. The guide member 75 is provided on the lower surface of the support member 43 at a position facing the upper surface of the rotation guide member 70 near the center in the front-rear direction of the first plate-shaped member 71. The guide member 75 has a parallel surface 751 (see FIG. 2) that is substantially parallel to the upper surface of the rotation guide member 70 in the transport posture in the vertical direction 7. As a result, the recording paper conveyed to the reversing transfer path 67 by the path switching unit 41 is conveyed along the vicinity of the upper surface of the rotation guide member 70. Further, the guide members 75 are provided at four locations side by side in the left-right direction 9. That is, there are two locations near both ends of the reversing transport path 67 and two locations near the center.

The guide member 75 is preferably arranged at a position facing the central portion of the rotation guide member 70 in the transport direction of the recording paper, but may be arranged at a position other than the central portion. Further, as in the case where four guide members 75 are arranged in the left-right direction 9 in the present embodiment, it is preferable that a plurality of guide members 75 are arranged in a direction orthogonal to the transport direction of the recording paper of the rotation guide member 70. , Only one may be arranged, or other than four.

A roller 752 (see FIG. 7) may be provided near the lower end of the guide member 75. The roller 752 is rotatably provided with the left-right direction 9 as the axial direction so that the roller surface is exposed from the lower side of the guide member 75. The position of the roller 752 in the left-right direction 9 is arbitrary as long as it is not the position where the paper feed arm 25 or the drive transmission mechanism 27 is provided. Further, the number of rollers 752 may be one, or a plurality of rollers 752 may be arranged in the left-right direction 9. Further, the roller 752 may be formed in a spur shape. This is because the roller surface of the roller 752 comes into contact with the recording surface of the recording paper. By providing the roller 752, the recording paper in contact with the roller 752 can be smoothly transported.

As shown in FIG. 5 (B), the rotation guide member 70 has a first recess 76 having a shape facing the guide member 75 at a position facing the guide member 75 (an example of a first accommodating portion of the present invention). It has. The first recess 76 is configured as a recess slightly larger than the guide member 75 so that the guide member 75 can be accommodated. In the present embodiment, the first recess 76 is provided at a position facing the guide member 75 in the left-right direction 9, that is, at two locations near both ends of the rotation guide member 70 and two locations near the center. The first recess 76 may be a through hole.

When the guide member 75 and the first recess 76 are configured as described above, as shown in FIG. 6B, the rotation guide member 70 is in a state where the rotation guide member 70 is rotated in the retracted posture. Is housed in the first recess 76.

[Cushioning member 80] As shown in FIG. 2, a cushioning member 80 (an example of the cushioning member of the present invention) is provided at a position of the support member 43 facing the upper surface of the rotation guide member 70. The cushioning member 80 is composed of an absorbent material such as a sponge, a damper, or a spring such as a leaf spring or a resin spring member. The cushioning member 80 is attached to the lower surface of the support member 43 at a position facing the upper surface near the tip (rear end) of the first plate-shaped member 71 of the rotation guide member 70. The cushioning member 80 may be arranged outside the sheet transport path in a direction orthogonal to the sheet transport direction.

[2nd recess 81] As shown in FIG. 2, the recording paper of the second plate-shaped member 72 of the rotation guide member 70 is conveyed to the surface to which the recording paper is conveyed, that is, to the downstream end of the inversion transfer path 67 of the rotation guide member 70. A second recess 81 (an example of the second accommodating portion of the present invention) having a shape facing the roller 64 is provided. The position of the second recess 81 in the left-right direction 9 is a position facing the transport roller 64. The transport roller 64 is located at a position where the rotation guide member 70 comes into contact with the rotation guide member 70 when the rotation guide member 70 takes a retracted posture among the plurality of transport rollers 64 provided on the outer guide member 18 or the inner guide member 19. It is a transport roller 64A. When the position facing the transport roller 64A is the first plate-shaped member 71, the second recess 81 is provided in the first plate-shaped member 71. By providing the second recess 81, the transport roller 64A is housed in the second recess 81 in a state where the rotation guide member 70 is in the retracted posture.

[Transport auxiliary roller 84] The rotation guide member 70 is provided with a transport auxiliary roller 84 (an example of the second roller of the present invention) at a position on the downstream side in the transport direction of the recording paper. The transport auxiliary row 84 is provided so as to expose the roller surface from the transport surface of the recording paper in the rotation guide member 70, and is rotatably provided with the left-right direction 9 orthogonal to the transport surface as the axial direction. The transport auxiliary roller 84 may be rotatable without receiving drive transmission from the drive source, or may be rotated by drive transmission from the drive source.

[Effect of embodiment] In the above-described embodiment, when the recording paper is conveyed in the multifunction device 10, the paper feed arm 26 takes an approaching posture in order to supply the recording paper placed on the tray 20 to the curved path 65A. At this time, the rotation guide member 70 takes a transport posture in order to form a part of the reverse transport path 67. When the tray 20 is inserted and removed from the multifunction device 10, the paper feed arm 26 rotates in a separated posture and retracts from the insertion / removal area of the tray 20. The area for the rotation guide member 70 to take the transport posture overlaps with the area for the paper feed arm 26 to take the separated posture, and when the paper feed arm 26 takes the separated posture, the rotation guide member 70 Take a retracted posture. As a result, the transport posture of the rotation guide member 70 can be positioned within the rotation region of the paper feed arm 26.

Further, in the above-described embodiment, by making the rotation shaft of the paper feed arm 26 and the rotation shaft of the rotation guide member 70 the same, it is possible to make the area for providing the rotation shaft common. .. Further, since the rotation region of the paper feed arm 26 and the rotation region of the rotation guide member 70 can be shared, it is possible to prevent the multifunction device 10 from becoming large in size.

Further, in the above-described embodiment, the rotation guide member 70 forms a part of the inverted transport path 67 in the transport posture below the retracted posture. At this time, if the guide member 75 is not provided, the width of the reversing transport path 67 formed by the rotation guide member 70 increases in the vertical direction 7. Then, the transported recording paper may swing in the vertical direction on the reversing transport path 67, resulting in jam. However, according to the above-described embodiment, since the width of the reversing transport path 67 in the vertical direction is reduced by the guide member 75, it is possible to prevent jamming of the recording paper in the reversing transport path 67.

Further, in the above-described embodiment, since the guide member 75 is located at the center of the rotation guide member 70 in the transport direction of the recording paper, the recording paper transported on the rotation guide member 70 is reliably rotated. It is conveyed along the upper surface of the guide member 70.

Further, in the above-described embodiment, for example, by arranging the guide member 75 at the end of the rotation guide member 70 in the transport direction of the recording paper, it is possible to cope with a large size sheet. Further, by arranging it near the center, it is possible to cope with a small size sheet. That is, with the above configuration, the rotation guide member 70 can handle sheets of various sizes.

Further, in the above-described embodiment, the lower surface 23 of the paper feed arm 26 is pushed by the side plate 55 of the tray 20, so that the paper feed arm 26 is rotated to the separated posture. Therefore, it is not necessary to newly provide a member for rotating the paper feed arm 26 to the separated posture.

Further, in the above-described embodiment, the lower surface 74 of the rotation guide member 70 is pushed by the upper surface 21 of the paper feed arm 26, so that the rotation guide member 70 is rotated to the retracted posture. Therefore, it is not necessary to newly provide a member for rotating the rotation guide member 70 to the retracted posture.

Further, in the above-described embodiment, the rotation guide member 70 has a thin plate shape. In this case, the central portion of the rotation guide member 70 in the left-right direction 9 may be bent downward due to the weight of the rotation guide member 70 and the transport resistance of the recording paper. However, in the above-described embodiment, the downward bending of the rotation guide member 70 is regulated by the side guide 77, so that the transport of the recording paper is stable.

Further, in the above-described embodiment, the rotation guide member 70 is supported by the tray 20. As a result, the position of the rotation guide member 70 can be stabilized, and the transfer of the recording paper in the reverse transfer path 67 is stable. Further, since the load of the rotation guide member 70 is not applied to the paper feed arm 26, the feeding of the recording paper by the paper feed roller 25 is not affected.

Further, in the above-described embodiment, the cushioning member 80 is provided on the support member 43. If the cushioning member 80 is not provided, the following problems may occur. That is, when the tray 20 is inserted into and removed from the multifunction device 10, or when the multifunction device 10 is transported, the rotation guide member 70 is a support member 43 that supports the upper recording unit 24 by its rotation. May collide with. In the above-described embodiment, since the cushioning member 80 is provided on the support member 43, it is possible to prevent the rotation guide member 70 from being damaged even when the above-mentioned collision occurs.

Further, in the above-described embodiment, when the rotation guide member 70 takes a posture of being separated from the recording unit 24 rather than the transport posture, the reverse transport path 67 is opened. Therefore, even if the recording paper is jammed in the reversing transport path 67, the recording paper can be easily removed.

Further, in the above-described embodiment, the paper feed arm 26 can take a separated posture at a higher position. As a result, it is possible to prevent the multifunction device 10 from becoming larger.

Further, in the above-described embodiment, when the rotation guide member 70 is in the retracted posture, the transport roller 64 provided in the curved path 65A is retracted by the second recess 81 provided in the rotation guide member 70. can do. As a result, the tip of the rotation guide member 70 can be extended further toward the curved path 65A, so that the recording paper transported on the reversing transport path 67 can be stably transported to the curved path 65A. To become. Further, when the rotation guide member 70 is in the retracted posture, the guide member 75 can be retracted by the first recess 76 provided in the rotation guide member 70. As a result, the movable range of the rotation guide member 70 can be increased, and the multifunction device 10 can be made thinner.

Further, in the above-described embodiment, when the recording paper conveyed on the rotation guide member 70 rushes into the curved path 65A, a particularly large resistance is generated in the recording paper. Therefore, the recording paper comes into contact with the upper surface of the rotation guide member 70 on the downstream side in the transport direction of the recording paper. Therefore, by arranging the transfer auxiliary roller at the position where the recording paper comes into contact with each other, the transfer resistance can be relaxed and the recording paper can be transferred smoothly.

[Modified example of the embodiment] As shown in FIG. 2, two coil springs 86 (an example of the elastic member of the present invention) that urge the rotation guide member 70 downward may be further provided. One end of the coil spring 86 is attached to the convex portion 711 or the convex portion 712 of the rotation guide member 70, respectively, and the other end is attached to the lower surface of the support portion 43, respectively. The mounting direction of the coil spring 86 is 8 in the vertical direction. The coil spring 86 is a compression spring whose total length is longer than the length between the convex portion 711 or the convex portion 712 of the rotation guide member 70 and the support member 43. As a result, the coil spring 86 urges the rotation guide member 70 downward regardless of the insertion / removal state of the paper feed cassette 78. The number of coil springs 86 may be one. Further, the other end of the coil spring 86 may be attached to the frame on the bottom surface of the compound machine 10. In this case, the coil spring 86 is an extension spring whose total length is shorter than the length between the convex portion 711 or the convex portion 712 of the rotation guide member 70 and the frame on the bottom surface of the multifunction device 10. As a result, the coil spring 86 urges the rotation guide member 70 downward regardless of the insertion / removal state of the paper feed cassette 78.

In the above embodiment, the rotation guide member 70 is urged downward by a coil spring in addition to being supported by the tray 20. Therefore, the position of the rotation guide member 70 can be more stable.

10: Multifunction device 20: Tray 24: Recording section 25: Paper feed roller 26: Paper feed arm 43: Support member 70: Rotation guide member 75: Guidance member 76: 1st recess 77: Side guide 80: Buffer member