Fitting structure, header unit and header

In the field of pipe joints, a configuration has already been proposed in which a pipe once connected to a pipe joint can be removed at the site (Patent Document 1). Here, in Patent Document 1, a jig is inserted between the pipe and the cap of the connecting portion of the pipe joint along the surface of the pipe, and the jig is used to form a pipe holding portion provided at the connecting portion. The pipe can be removed by releasing the holding. However, in a header in which a plurality of header bases having a pipe holding portion are connected, when the header base is removed from the header, the outer peripheral surface of each header base is covered with a resin cover (outer cylinder) without gaps, so that the pipe and the header base are covered with a resin cover (outer cylinder). It is not possible to secure a space for inserting the jig between the cap and the cap.

Further, when a header shipped by connecting a plurality of header bases at a factory is once disassembled at the site and then reassembled, the following problems are expected. That is, at the factory, the header is assembled and shipped after confirming the sealing performance by an airtightness test or the like. This guarantees the quality of the header. However, if a water leak occurs in the header that was once disassembled and reassembled at the site, it is difficult to determine whether there was a defect in the assembly at the site or at the assembly stage at the factory.

<p><patcit num="1"><text>Japanese Unexamined Patent Publication No. 2010-190319</text></patcit></p>

<p> In view of the above facts, an object of the present invention is to provide a joint structure, a header base, and a header that can be confirmed to be removed later when the header base constituting the header is removed.</p>

<p> The joint structure according to the invention according to claim 1 has a multi-layer structure consisting of an inner cylinder in which a first flow path is formed and an outer cylinder surrounding the inner cylinder, and one end of the joint structure is described as described above. The inner cylinder from which the outer cylinder has been removed is connected to the first cylinder body which is a connecting cylinder portion for connection and the second flow path inside, and is connected to the connected cylinder portion inserted at the end portion. A second cylinder provided with a connecting means for communicating the first flow path and the second flow path and the outer cylinder facing the second cylinder are cut out and moved along the inner cylinder. It has a notch into which a jig for disconnecting the connecting means is inserted, and a limiting means which is removably projected from the outer cylinder to the notch and prevents the jig from being inserted. It is a feature.</p><p> According to the invention of claim 1, the first cylinder body and the second cylinder body are connected by the connecting means, and the first flow path and the second flow path are communicated with each other. At this time, in the first cylinder having a multi-layer structure, an outer cylinder facing the second cylinder is cut out, and a notch portion having a size into which a jig is inserted is formed. The notch is provided with limiting means to prevent the jig from being inserted. According to the configuration according to claim 1, the connected first cylinder body and second cylinder body can be separated by the following procedure. That is, first, the limiting means provided in the notch portion of the first cylinder is cut off, and the jig is inserted into the notch portion. Next, the jig is moved along the inner cylinder in the axial direction. As a result, the connection of the connecting means of the second cylinder is released, and the first cylinder and the second cylinder can be separated from each other. In addition, in order to separate the first cylinder and the second cylinder, it is necessary to cut off the limiting means provided in the notch. Therefore, the state in which the limiting means is excised can be regarded as a trace of separating the first cylinder and the second cylinder. That is, it can be confirmed that they have been separated. At this time, even if the cutting is not performed, if the limiting means is significantly deformed, a trace of plastic deformation remains at the joint with the outer cylinder. Therefore, even in this case, the first cylinder and the second cylinder are also formed. Can be used as a trace of separation.</p><p> The invention according to claim 2 is characterized in that, in the joint structure according to claim 1, the limiting means projects from the end face of the notch portion in the axial direction of the first cylinder.</p><p> According to the second aspect of the present invention, the limiting means projects from the end surface of the notch portion of the outer cylinder in the axial direction of the first cylinder body, and prevents the jig from being inserted into the notch portion. Therefore, the jig cannot be inserted into the notch unless the limiting means is cut off. As a result, the state in which the limiting means is excised can be regarded as a trace of separating the first cylinder and the second cylinder.</p><p> The invention according to claim 3 is characterized in that, in the joint structure according to claim 1, the limiting means projects from the end face of the notch portion in the circumferential direction of the first cylinder.</p><p> According to the third aspect of the present invention, the limiting means projects from the end surface of the notch portion of the outer cylinder in the circumferential direction of the first cylinder body, and prevents the jig from being inserted into the notch portion. Therefore, the jig cannot be inserted into the notch unless the limiting means is cut off. As a result, the state in which the limiting means is excised can be regarded as a trace of separating the first cylinder and the second cylinder.</p><p> The invention according to claim 4 is the joint structure according to claim 1, wherein the notch portion cuts the outer cylinder from both sides to the outer peripheral surface of the inner cylinder along the tangent line of the inner cylinder. The limiting means is characterized in that each of the limiting means projects from the end surface of the notch portion in the axial direction of the first cylinder.</p><p> According to the invention of claim 4, limiting means are provided in the axial direction of the first cylinder from the end faces of the notches on both sides of the outer cylinder to prevent the jig from being inserted into the notches. .. Therefore, the jig cannot be inserted into the notch unless the limiting means is cut off. As a result, the state in which the limiting means is excised can be regarded as a trace of separating the first cylinder and the second cylinder.</p><p> The header substrate according to the invention according to claim 5 has a multi-layer structure consisting of an inner cylinder having a flow path formed inside and an outer cylinder surrounding the inner cylinder, and is inserted into one end from the outside. A first connecting means for connecting the first connecting cylinder portion is provided, and at the other end portion, the inner cylinder from which the outer cylinder has been removed is used as a second connecting cylinder portion for connection, and the inner cylinder is formed. A branch cylinder having a branch flow path communicating with the flow path is formed from the peripheral wall by notching a cylinder body protruding in the radial direction and the outer cylinder on the other end side, and the second connecting cylinder portion. Is connected to an external second connecting means, a notch portion into which a jig for inserting a jig for moving along the inner cylinder to release the connection of the second connecting means is inserted, and the notch portion from the outer cylinder. It is characterized by having a limiting means that is removably protruded into the jig and prevents the jig from being inserted.</p><p> According to the invention of claim 5, in the header substrate, the first connecting cylinder portion inserted from the outside is connected by the first connecting means provided at one end portion, and the flow of the first connecting cylinder portion is formed. The path and the flow path of the header substrate are communicated with each other. Further, the second connecting cylinder portion formed at the other end portion is connected to the external second connecting means, and the flow path of the header substrate and the flow path of the second connecting means are communicated with each other. At this time, a notch portion from which the outer cylinder is cut is formed in the tubular body, and the notch portion is provided with a limiting means for preventing the insertion of the jig for releasing the connection with the second connecting means. .. According to the fifth aspect, the second connecting cylinder portion is connected to the external second connecting means, and after the header is formed, the second connecting means and the second connecting cylinder portion can be separated. .. At this time, in order to separate the parts, it is necessary to cut off the limiting means provided in the notch, and the state in which the limiting means is cut from the outer cylinder is changed to the second connecting means and the second connecting cylinder. Can be a trace of separation. That is, it can be confirmed that they have been separated. At this time, even if the cutting is not performed, if the limiting means is greatly deformed, a trace of plastic deformation remains at the joint between the limiting means and the outer cylinder. Therefore, even in this case, the second connecting means and the second connecting means and the second 2 It can be a trace that the connecting cylinder is separated.</p><p> The invention according to claim 6 is characterized in that, in the header substrate according to claim 5, the marking means is projected from the end face of the notch portion in the axial direction of the cylinder.</p><p> According to the invention of claim 6, the limiting means projects from the end surface of the notch portion of the outer cylinder in the axial direction of the cylinder body, and prevents the jig from being inserted into the notch portion. Therefore, the jig cannot be inserted into the notch unless the limiting means is cut off. As a result, the state in which the limiting means is cut can be regarded as a trace of separating the second connecting means and the second connecting cylinder portion.</p><p> The invention according to claim 7 is characterized in that, in the header substrate according to claim 5, the limiting means projects from the end face of the notch portion in the circumferential direction of the cylinder.</p><p> According to the invention of claim 7, the limiting means projects from the end surface of the notch portion of the outer cylinder in the circumferential direction of the cylinder body, and prevents the jig from being inserted into the notch portion. Therefore, the jig cannot be inserted into the notch unless the limiting means is cut off. As a result, the state in which the limiting means is cut can be regarded as a trace of separating the second connecting means and the second connecting cylinder portion.</p><p> The invention according to claim 8 is the header substrate according to claim 5, wherein the notch portion cuts the outer cylinder from both sides to the outer peripheral surface of the inner cylinder along the tangent line of the inner cylinder. The limiting means is characterized in that each of the limiting means projects from the end surface of the notch portion in the axial direction of the cylinder.</p><p> According to the invention of claim 8, the limiting means projects from the end faces of the notches on both sides of the outer cylinder in the axial direction of the cylinder, and prevents the jig from being inserted into the notches. Therefore, the jig cannot be inserted into the notch unless the limiting means is cut off. As a result, the state in which the limiting means is cut can be regarded as a trace of separating the second connecting means and the second connecting cylinder portion.</p><p> The header according to the invention according to claim 9 has a multi-layer structure consisting of an inner cylinder having a first flow path formed inside and an outer cylinder surrounding the inner cylinder, and is inserted from the outside at one end. A first connecting means for connecting the first connecting cylinder portion is provided, and the other end portion is a second connecting cylinder portion from which the outer cylinder has been removed. A first header base in which a branch cylinder having a branch flow path communicating with one flow path is projected in the radial direction, an inner cylinder in which a second flow path is formed inside, and an outer cylinder surrounding the inner cylinder. A second connecting means connected to the second connecting cylinder is provided at one end, and a third connecting cylinder from which the outer cylinder is removed is formed at the other end. A second header base having a branch flow path communicating with the second flow path is radially projected from the peripheral wall of the inner cylinder, and the outer cylinder of the first header base is cut out. And a notch into which a jig is formed and is inserted along the inner cylinder to release the connection of the second connecting means. It is characterized by having a limiting means that is removably projected from the outer cylinder to the notch portion and prevents the jig from being inserted.</p><p> According to the invention of claim 9, the first header base and the second header base are connected by the second connecting means, and the first flow path and the second flow path are communicated with each other. At this time, the first header substrate having a multi-layer structure is formed with a notch in which the jig formed by removing the outer cylinder is inserted, and the notch prevents the jig from being inserted. Restriction measures are provided. With the configuration according to claim 9, the connected first header base and second header base can be separated by the following procedure. That is, first, the limiting means provided in the notch portion of the first header substrate is cut off, and the jig is inserted into the notch portion. Next, the jig is moved in the axial direction along the inner cylinder of the first header substrate. As a result, the connection means of the second header base is released, and the first header base and the second header base can be separated from each other. In addition, in order to separate the first header base and the second header base, it is necessary to cut off the limiting means provided in the notch. As a result, the state in which the limiting means is cut off can be used as a trace of separating the first header base and the second header base. That is, it can be confirmed that they have been separated. At this time, even if the cutting is not performed, if the limiting means is greatly deformed, a trace of plastic deformation remains at the joint between the limiting means and the covering member. Therefore, even in this case, the first header substrate and the first header substrate and the first 2 It can be a trace of the header substrate being separated.</p><p> The invention according to claim 10 is characterized in that, in the header according to claim 9, the limiting means projects from the end surface of the notch portion in the axial direction of the first header substrate.</p><p> According to the invention of claim 10, the limiting means projects from the end surface of the notch portion of the outer cylinder in the axial direction of the cylinder body, and prevents the jig from being inserted into the notch portion. Therefore, the jig cannot be inserted into the notch unless the limiting means is cut off. As a result, the state in which the limiting means is cut can be regarded as a trace of separating the first header base and the second header base.</p><p> The invention according to claim 11 is characterized in that, in the header according to claim 9, the limiting means projects from the end surface of the notch portion in the circumferential direction of the first header substrate.</p><p> According to the invention of claim 11, the limiting means is provided in the circumferential direction of the cylinder from the end surface of the notch portion of the outer cylinder, and prevents the jig from being inserted into the notch portion. Therefore, the jig cannot be inserted into the notch unless the limiting means is cut off. As a result, the state in which the limiting means is cut can be regarded as a trace of separating the first header base and the second header base.</p><p> According to a twelfth aspect of the present invention, in the header according to the ninth aspect, the notch portion cuts the outer cylinder from both sides to the outer peripheral surface of the inner cylinder along the tangent line of the inner cylinder. The limiting means is formed and is characterized in that each of the limiting means projects from the end surface of the notch portion in the axial direction of the first header substrate.</p><p> According to the invention of claim 12, the limiting means projects from the end faces of the notches on both sides of the outer cylinder in the axial direction of the cylinder, and prevents the jig from being inserted into the notches. Therefore, the jig cannot be inserted into the notch unless the limiting means is cut off. As a result, the state in which the limiting means is cut can be regarded as a trace of separating the first header base and the second header base.</p>

<p> Since the present invention has the above configuration, it is possible to provide a joint structure, a header base, and a header that can be confirmed later when the header base constituting the header is removed.</p>

<figref num="1">It is sectional drawing which shows the basic structure of the joint structure which concerns on 1st Embodiment of this invention.</figref><figref num="2">It is an external perspective view which shows the structure of the notch part which concerns on 1st Embodiment of this invention.</figref><figref num="3">It is external perspective view which shows the release procedure of the joint structure which concerns on 1st Embodiment of this invention.</figref><figref num="4">It is sectional drawing which shows the release procedure of the joint structure which concerns on 1st Embodiment of this invention.</figref><figref num="5">It is an external perspective view which shows the structure of the notch part which concerns on 2nd Embodiment of this invention.</figref><figref num="6">It is sectional drawing which shows the structure of the notch part which concerns on 3rd Embodiment of this invention.</figref><figref num="7">It is an external perspective view which shows the release procedure of the joint structure which concerns on 3rd Embodiment of this invention.</figref><figref num="8">It is sectional drawing which shows the basic structure of the joint structure which concerns on 4th Embodiment of this invention.</figref><figref num="9">It is a partial cross-sectional view which shows the basic structure of the header substrate which concerns on 5th Embodiment of this invention.</figref><figref num="10">It is an external perspective view which shows the structure of the header which concerns on 6th Embodiment of this invention.</figref><figref num="11">It is a partial cross-sectional view which shows the connection procedure of the header which concerns on 6th Embodiment of this invention.</figref>

(First Embodiment) As shown in FIG. 1, the joint structure 10 according to the first embodiment of the present invention has a first pipe 80 and a second pipe 82, and the first pipe 80 and the second pipe 82 are one-touch joints 22. It is connected. The first pipe 80 has a double pipe structure (multi-layer structure) of an inner cylinder 18 having a first flow path 16 formed therein and an outer cylinder 46 surrounding the inner cylinder 18. Here, the inner cylinder 18 is molded of a heat-resistant resin material or a metal material, and the outer cylinder 46 is formed of a resin material. On the other hand, the outer cylinder 46 has one or more roles of reinforcing, protecting, keeping warm, improving the aesthetic appearance, and the like of the inner cylinder 18.

A tubular portion 20 is formed at the end of the first pipe 80. The tubular portion 20 is a portion to be inserted into the one-touch joint 22, and is provided within a range of length L1 from the tip portion of the first pipe 80. The outer cylinder 46 is removed within the range of the cylinder portion 20. The second pipe 82 has a second flow path 17 formed inside, and a diameter-expanded portion 84 having an inner diameter expanded to the diameter into which the cylinder portion 20 of the inner cylinder 18 is inserted is formed at the end portion. .. The one-touch joint 22 for connecting the inserted tubular portion 20 is configured by using the enlarged diameter portion 84.

The one-touch joint 22 has a holding cylinder 28 arranged on the inner peripheral surface of the enlarged diameter portion 84. The holding cylinder 28 is formed of resin in a cylindrical shape and surrounds the outer peripheral surface of the cylinder portion 20 inserted in the direction of arrow D1. The cylindrical portion of the holding cylinder 28 is provided with a plurality of slits (not shown) in the direction of the axis 32. The slit is cut out from one end 28E of the holding cylinder 28 to a position beyond the central portion of the cylindrical portion. As a result, the diameter of the holding cylinder 28 can be expanded in the radial direction. Further, a claw portion 29 is provided in a ring shape on the cylindrical portion of the holding cylinder 28.

The claw portion 29 is embedded in the cylindrical portion of the holding cylinder 28 in the circumferential direction, and is divided by a slit portion. As a result, the claw portion 29 can be expanded in diameter in conjunction with the expansion of the diameter of the holding cylinder 28. The claw portion 29 is arranged so as to be inclined in a direction in which the diameter decreases in the direction of arrow D1, and the tip of the claw portion 29 protrudes from the inner peripheral surface of the holding cylinder 28. As a result, the claw portion 29 allows the tubular portion 20 to be inserted in the direction of the arrow D1 and surrounds and holds the outer peripheral surface of the inserted tubular portion 20. In addition, it prevents the tubular portion 20 from moving in the direction in which it comes out (arrow D2 direction). As a result, the connected state of the first pipe 80 and the second pipe 82 is maintained.

An open cylinder portion 30 is arranged between the holding cylinder body 28 and the enlarged portion 84. The open cylinder portion 30 is formed in a cylindrical shape, and the cylindrical portion surrounds the outer peripheral surface of the holding cylinder 28. A folded-back portion 30S is formed at the end of the open cylinder portion 30 on the arrow D2 side, and the folded-back portion 30S is in contact with the tip end portion 84S of the enlarged portion 84. As a result, the movement of the open cylinder portion 30 in the direction of arrow D1 is restricted. The end portion 30E on the arrow D1 side of the open cylinder portion 30 is provided with an inclined portion 31 having an inclination that expands in the direction of the arrow D1. The length of the inclined portion 31 in the axis 32 direction is L2.

The tip of the inclined portion 31 is in contact with the end 28E of the holding cylinder 28 in the arrow D1 direction, and when the holding cylinder 28 is moved in the arrow D1 direction by a distance L2, the end 28E of the holding cylinder 28 is moved. The diameter is expanded by riding on the inclined portion 31. At this time, since the holding cylinder 28 is provided with a slit on the cylinder portion 28E side, the diameter of the cylindrical portion and the claw portion 29 can be easily expanded. As a result, the distance between the facing claw portions 29 is widened, the holding of the tubular portion 20 is released, and the first pipe 80 and the second pipe 82 can be separated.

Further, the outer peripheral surface of the enlarged portion 84 and the tip portion 84S are surrounded by a cap 34. The cap 34 is made of resin (for example, polyacetal resin, glass fiber reinforced nylon, etc.) and is fitted on the outer peripheral surface of the enlarged portion 84 so as to be rotatable in the circumferential direction. Therefore, at least a part of each of the holding cylinder 28, the open cylinder 30, and the inserted cylinder 20 is surrounded by the cap 34, and the holding cylinder 28 and the open cylinder 30 move in the radial direction and Movement in the 32 direction of the axis is restricted. The cap 34 may be attached by a screwing method in which the male screw provided on the enlarged portion 84 and the female screw provided on the cap 34 are screwed together.

The end 28S of the holding cylinder 28 in the arrow D2 direction extends along the outer peripheral surface of the cylinder 20 and enters the gap between the cylinder 20 and the cap 34. The tip 28S of the extended holding cylinder 28 is substantially flush with the tip 34S of the cap 34. Further, in the direction of arrow D1 of the open cylinder portion 30, an O-ring 52 for preventing water leakage from between the enlarged diameter portion 84 at the tip of the second pipe 82 and the cylinder portion 20 is fitted.

Next, the notch portion will be described. As shown in the external perspective view of the joint structure of FIG. 2, a notch 36 is formed at the end of the outer cylinder 46 of the first pipe 80. Here, FIG. 2 (b) is a view seen from the direction of arrow R shown in FIG. 2 (a). Here, the notch portion 36 is formed by notching the end portion of the outer cylinder 46 on the one-touch joint 22 side. The notch portion 36 has a size required for inserting a jig for disconnecting the claw portion 29 for connecting the cylinder portion 20. The jig will be described later. Further, the notch portion 36 has a circumferential end surface 54 notched in the circumferential direction and an axial end surface 56 notched in the direction of the axis 32, and the inner cylinder 18 is inside the notch portion 36. Is exposed.

The rib 38 projects in a direction parallel to the axis 32 from substantially the center of the circumferential end surface 54 of the notch 36. The rib 38 has a plate shape, and is formed to have substantially the same length as the length of the notch 36 in the axial 32 direction. The joint portion 38A of the rib 38 with the circumferential end surface 54 is partially thinned so that it can be easily cut off.

According to the configuration of the present embodiment, the first pipe 80 and the second pipe 82 connected by the one-touch joint 22 can be separated by the following procedure. As shown in the separation procedure of FIGS. 3 and 4, the first pipe 80 and the second pipe 82 are separated by using a dedicated jig 40.

First, the jig 40 will be described. The jig 40 has a curved portion 42 having a curved surface covering the outer peripheral surface over approximately half the circumference (length S1 along the curved surface) of the tubular portion 20. The length of the curved portion 42 in the axis 32 direction is H1. Further, the jig 40 has a flange portion 44 bent in the radial direction from the end portion of the curved portion 42. The flange portion 44 is used as a knob portion when the curved portion 42 is inserted.

The notch 36 has a length H2 larger than the circumferential length S1 of the curved portion 42 of the jig 40, a circumferential length S2, and a length H1 of the curved portion 42 in the axial 32 direction, and is outside. It is formed by excising the end of the cylinder 46 on the side of the cylinder 20. As a result, the curved portion 42 of the jig 40 can be inserted into the notch portion 36, and the curved portion 42 can be brought into contact with the surface of the notch portion 36. A rib 38 is projected from the notch 36. The rib 38 projects from substantially the center of the circumferential end face 54. Therefore, the distance from the side surface of the rib 38 to the axial end surface 56 of the notch 36 is smaller than the circumferential width S1 of the curved portion 42. As a result, the curved portion 42 of the jig 40 cannot be inserted into the gap between the ribs 38.

Therefore, in the separation procedure, first, the rib 38 provided in the notch 36 is cut off, and the jig 40 is inserted into the notch 36 (see FIGS. 3 (a) and 4 (a) (b)). ). Here, since the joint 38A of the rib 38 with the outer cylinder 46 is thinned, the rib 38 can be easily cut at the position of the joint 38A.

Next, the jig 40 is moved along the tubular portion 20 in the axial direction. That is, the curved portion 42 is inserted between the cap 34 and the cylinder portion 20, and the tip 28S of the holding cylinder 28 is pushed in the direction of the arrow D1 along the surface of the inner cylinder 18 (FIG. 3 (b), FIG. 4 (c)). As a result, the holding cylinder 28 can be moved in the direction of arrow D1. By moving the holding cylinder 28, as described above, the end portion 28E of the holding cylinder 28 rides on the inclined portion 31 of the open cylinder portion 30, and the diameter of the end portion 28E and the claw portion 29 of the holding cylinder 28 is expanded. Then, the holding of the claw portion 29 is released. As a result, the holding portion 28 provided in the connecting means of the second pipe 82 is released, and the first pipe 80 and the second pipe 82 can be separated.

As described above, according to the present embodiment, the connected first pipe 80 and second pipe 82 can be removed and reassembled, for example, at the site. At this time, it is necessary to cut off the rib 38 provided in the notch 36 for removal, and when the rib 38 is cut off, it is a trace that the first pipe 80 and the second pipe 82 are separated. can do. Further, even if the rib 38 is not excised, when the rib 38 is greatly deformed, a trace of plastic deformation remains at the joint with the outer cylinder 46. Therefore, even in this case, the first pipe 80 and the first pipe 80 2 It can be a trace of the pipe 82 being separated.

The case where the first pipe 80 has a double pipe structure of an inner cylinder 18 and an outer cylinder 46 has been described. However, the structure is not limited to this, and a structure of a triple pipe or more having an intermediate cylinder between the inner cylinder 18 and the outer cylinder 46 may be used. Further, a single tube configuration in which the inner cylinder 18 and the outer cylinder 46 are integrally molded may be used. Thereby, the same effect as in the case of the double pipe structure can be obtained.

(Second embodiment) As shown in FIG. 5, the joint structure 60 according to the second embodiment has a first pipe 80 and a second pipe 82, and the first pipe 80 and the second pipe 82 are connected by a one-touch joint 22. There is. The first pipe 80 is provided with a notch 37 having substantially the same dimensions at the same position as the notch 36 described in the first embodiment. A rib 62 projects from one axial end surface 57 of the notch 37 toward the other axial end surface 57 (toward the circumferential direction).

The rib 62 has a flat plate shape and covers the outer peripheral surface of the inner cylinder 18 with the same height dimension in the radial direction as the outer cylinder 46. The rib 62 has a thin plate thickness at the joint portion 62A with the end face 56 in the axial direction, and can be easily cut off. Further, the rib 62 is provided near the central portion of the axial end surface 56, and the gap between the rib 62 and the notch 36 is the axial length H1 of the jig 40 described in the first embodiment. It is made smaller and the curved portion 42 of the jig 40 cannot be inserted. It should be noted that one end of the rib 62 may have a length halfway without reaching the end face 57 in the axial direction of the other.

With such a configuration, in order to insert the curved portion 42 of the jig 40 described in the first embodiment into the notch 37, it is necessary to cut the rib 62 from the notch 37. As a result, when the rib 62 is excised, it can be a trace of the first pipe 80 being separated. Other configurations are the same as those in the first embodiment, and the description thereof will be omitted.

(Third embodiment) As shown in FIGS. 6 and 7, the joint structure 70 according to the third embodiment has a first pipe 80 and a second pipe 82, and the first pipe 80 and the second pipe 82 are connected by a one-touch joint 22. Has been done. The first pipe is provided with a notch 72. Here, FIG. 6A is a cross-sectional view of the notch portion, and FIG. 6B is a plan view of the jig. Further, FIG. 7 (a) is a perspective view of the notch, FIG. 7 (b) is a perspective view of the jig, and FIG. 7 (c) is a view of the jig inserted in the notch. is there.

The notch 72 is formed by cutting the outer cylinder 46 of the first pipe 80 from both sides to the outer peripheral surface of the inner cylinder 18 along the tangent line 58 of the inner cylinder 18. As a result, notches 72 are formed at two positions facing each other across the inner cylinder 18. The notch portion 72 has a dimension H4 that exceeds the axial length H3 of the curved portion 77 of the U-shaped jig 76, which will be described later, and the end portion on the cylinder portion side of the outer cylinder 46 is cut off. The two ribs 74 project from the end faces of the outer cylinder 46 of the notch 72 in the direction of the axis 32, respectively.

Here, the jig 76 has two curved portions 77 having curved surfaces along the outer peripheral surface of the tubular portion 20, and the curved portion 77 has a flange portion bent in the radial direction from the end portion of the curved portion 77. 78 are provided. The end of the collar 78 is extended along the notch 72, and the plan view is integrated in a U shape. The jig 76 is inserted into the notch 72 from which the rib 74 has been cut, and the curved portion 77 is inserted between the cap 34 and the inner cylinder 18 described in the first embodiment to hold the holding cylinder. Push down 28. As a result, the first pipe 80 and the second pipe 82 can be separated.

With such a configuration, it is necessary to remove the rib 74 in order to insert the jig 76 into the notch 72, and when the rib 74 is cut, the first pipe and the second pipe are separated. It can be a trace of the jig. Other configurations are the same as those in the first embodiment, and the description thereof will be omitted.

(Fourth Embodiment) As shown in FIG. 8, the joint structure 90 according to the fourth embodiment has a first pipe 80 and a third pipe 92, and the first pipe 80 and the third pipe 92 are connected by a one-touch joint 23. There is. The first pipe 80 has already been described in the first embodiment, and the description thereof will be omitted.

Here, the third pipe 92 has a third flow path 94 inside, and a one-touch joint 23 is provided at the tip thereof. A reduced diameter portion 85 having a reduced pipe diameter is provided at the tip of the third pipe 92, and the one-touch joint 23 is configured by using the reduced diameter portion 85. A tubular portion 20 of the first pipe 80 described in the first embodiment is inserted outside the reduced diameter portion 85. An O-ring 52 is provided between the reduced diameter portion 85 and the tubular portion 20 to prevent water leakage. As a result, the first flow path 16 of the first pipe 80 and the third flow path 94 described in the first embodiment are communicated with each other.

The one-touch joint 23 has a configuration in which the holding cylinder 28 of the one-touch joint 22 described in the first embodiment is divided into two parts, an annular holding ring 64 and an opening ring 66. Here, the holding ring 64 has a shape in which the cross section is bent in a dogleg shape, and the inner peripheral surface side is inclined in the direction of arrow D1. Further, the tip of the holding ring 64 is in contact with the outer peripheral surface of the tubular portion 20. As a result, the tubular portion 20 is held by the tip of the holding ring 64, and the tubular portion 20 is prevented from coming off.

The opening ring 66 is formed in a cylindrical shape and is provided on the side surface of the holding ring 64 on the insertion port side (direction of arrow D2). The end of the opening ring 66 on the holding ring 64 side has an inclined portion in contact with the inclined surface of the opening ring 66. On the arrow D1 side of the holding ring 64, a transparent cover 68 that surrounds the tubular portion 20 and the reduced diameter portion 85 is provided. At this time, the inclined portion of the tip of the transparent cover 68 and the inclined portion of the holding ring 64 are in contact with each other. Further, a cap 35 is provided so as to surround the outer periphery of the transparent cover 68, the holding ring 64, and the opening ring 66. This limits the radial movement of the transparent cover 68, the retaining ring 64, and the opening ring 66.

With such a configuration, by moving the tip 66S of the opening ring 66 in the direction of arrow D1 with a jig, the holding ring 64 can be moved along the inclined portion of the tip of the transparent cover 68. Can be done. As a result, the diameter of the holding ring 64 is expanded. As a result, the holding of the cylinder portion 20 of the holding ring 64 is released, and the cylinder portion 20 can be removed. The other configurations are basically the same as those of the first embodiment, and the description thereof will be omitted.

(Fifth Embodiment) As shown in FIG. 9, the header substrate 11 according to the fifth embodiment has the first pipe 80 described in the first embodiment. That is, the first pipe 80 has a double cylinder configuration of an inner cylinder 18 having a flow path 16 formed inside and an outer cylinder 46 surrounding the inner cylinder 18. Further, at one end of the first pipe 80, a connecting cylinder 20 is formed in which the outer cylinder 46 is removed with a width L1. At the other end of the first pipe 80, a one-touch joint 22a connected to a tubular portion (not shown) inserted from the outside is provided. The one-touch joint 22a has the same configuration as the one-touch joint 22 described in the first embodiment, and the description thereof will be omitted.

A branch pipe 24 having a branch flow path 25 communicating with the first flow path 16 projects radially from the peripheral wall of the inner cylinder 18 of the first pipe 80. At the tip of the branch pipe 24, a one-touch joint 26 for connecting the branch pipe 24 and a pipe (not shown) is provided.

By adopting the configuration of the header base described above, the tubular portion 20 of the header base 11 is connected to the one-touch joint of another header base having a branch flow path (not shown) to provide a plurality of branch flow paths. Headers can be provided. Also. By connecting the tubular portion of another header base (not shown) to the one-touch joint 22a of the header base 11, it is possible to provide a header having a plurality of branch flow paths.

The notch portion and the rib of the header base 11 have been described on the premise of the notch portion 36 and the rib 38 shown in the first embodiment. However, the present invention is not limited to this, and the cutout portion 37 and the rib 62 described in the second embodiment may be used, or the cutout portion 72 and the rib 72 described in the third embodiment may be used. Further, the description has been made on the premise of the one-touch joint 22 shown in the first embodiment as the connecting means, but the present invention is not limited to this, and the one-touch joint 23 described in the fourth embodiment may be used.

(Sixth Embodiment) As shown in FIG. 10, the header 12 according to the sixth embodiment of the present invention has a first header base 13 and a second header base 14, and the first header base 13 and the second header base 14 are It is connected by a one-touch joint 22b. Here, both the first header base 13 and the second header base 14 have the same configuration as the header base 11 described in the fifth embodiment. For convenience of explanation, the first header base 13 will be described with a subscript a, and the second header base 14 will be described with a subscript b.

That is, as shown in FIG. 11, the tubular portion 20a of the first header base 13 is inserted into the one-touch joint 22b of the second header base 13, and the first header base 13 and the second header base 14 are connected. .. It should be noted that each component has already been described in the fifth embodiment, and detailed description thereof will be omitted.

A pipe 50 connected to a heat source machine or the like (not shown) is inserted and fixed in the one-touch joint 22a of the first header base 13. As a result, the header 12 and the pipe 50 can communicate with each other, and water or hot water can flow in the direction of arrow W1 or arrow W2. The one-touch joint 22a may be connected to another header base (not shown) or a tubular portion of an elbow base having a bent portion formed therein. This makes it possible to increase the number of branch channels in the header.

Further, the tubular portion 20b of the second header substrate 14 is inserted into another header substrate or the one-touch joint 22c of the elbow substrate on which the bent portion is formed. This makes it possible to increase the number of branch channels in the header. The tubular portion 20b may be inserted into a one-touch joint of a pipe (not shown) connected to a heat source machine or the like. As a result, it is possible to connect to a heat source machine or the like (not shown).

With the header configuration described above, the rib 38a of the notch 36a of the first header base 13 can be cut off, and the jig 40 described in the first embodiment can be inserted. As a result, the bond with the second header base 14 can be released. At this time, it is necessary to cut off the rib 38a provided in the notch 36a for removal, and when the rib 38a is cut off, the first header base 13 and the second header base 14 are separated. It can be a trace.

Even if the rib 38a is not excised, if the rib 38a is significantly deformed, a trace of plastic deformation remains at the joint with the outer cylinder 46a. The second header substrate 14 can be a trace of separation.

The notch portions and ribs of the first header base 13 and the second header base 14 have been described on the premise of the notch portions 36 and ribs 38 shown in the first embodiment. However, the present invention is not limited to this, and the cutout portion 37 and the rib 62 described in the second embodiment may be used, or the cutout portion 72 and the rib 74 described in the third embodiment may be used. Further, the description has been made on the premise of the one-touch joint 22 shown in the first embodiment as the connecting means, but the present invention is not limited to this, and the one-touch joint 23 described in the fourth embodiment may be used. Further, any joint may be used as long as it can be disconnected by inserting a jig.

10 Fitting structure 11 Header base 12 header 13 1st header base 14 2nd header base 16 flow path (first flow path) 17 flow path (second flow path) 18 Inner cylinder 20 Cylinder (connecting cylinder) 22 One-touch fitting (connecting means) 24 branch pipe 36 Notch 37 Notch 38 ribs (restriction means) 40 jig 46 outer cylinder 80 1st pipe (1st cylinder) 82 2nd pipe (2nd cylinder)