Device for collecting folded printed sheets

Device for collecting folded printing sheets

The present invention relates to an apparatus for collecting printing sheets according to the preamble of claim 1.

Such a device is known, for example, from DE 6,616,566. It has three saddle-shaped supports arranged parallel to the common axis of rotation and rotating about it. In the direction of the axis of rotation, two subordinates are arranged in succession for placing the printing sheets on the supports and a stapling device for stapling the overlapping printing sheets together. Thus, the assembled and stapled printing sheets slide for removal with a conveyor belt. For each support, an endless, continuously rotatably driven chain is provided with grippers which act on the sheets of weight placed on the supports and transport them during the rotation about a common axis of rotation from one subjugator to another or to a stapler. Guide plates are provided on both sides of each of the supports 20 to prevent the printing of the printing sheets. In this case, the printing sheets can be damaged, especially in the area of ​​their folds. Since there is a gap between the diaper half and the grippers, it is also possible that the printing sheets may escape from the area of ​​operation of the gripper25, so that they are no longer transported and may be damaged. In addition, there are difficulties in placing the printing sheets on the supports, because in the case of continuously rotating supports, the printing sheets have to be led into the gap between the supports and the guide plates.

Another device for collecting folded printed matter is known from EP 0 095 603 and the corresponding patent US 4 489 930. It is provided with supports for two rotating transport chains, just like the sides of a ladder. At the beginning and end of the journey 35, the transport chains are guided over the swivel wheels; the top surface supports are set to feed2

95098 Folded printed matter is scattered, and the printed matter thus collected is lifted away from the support members and transported away.

The object of the present invention is to provide a device according to the preamble of claim 1 for collecting folded printing sheets, which enables a simple structure and reliable printing of printing sheets on supports, thus avoiding damage to the printing sheets.

This object is solved by the features of the characterizing part of claim 1.

The printing sheets are held by pressing devices which rotate with the supports so as to avoid damage due to the relative movements between the printing sheets and their holding device. The pressing devices guarantee the defined position of the printing sheets so that they always remain on the supports.

The pressing devices are movable longitudinally of the supports. The printing sheets held by the pressing devices move with them and thus cannot be lifted out of them even when they are transported along the supports. The pressing devices 25 thus also act as a pushing means for the printing sheets, whereby each press acts on two printing sheets and each printing sheet is held by two presses.

In the embodiment according to claim 4, wherein the presses of the pressing devices are controllable regardless of the position and movement of the pressing devices, the device can be adapted in a simple manner to the most diverse needs.

The embodiment according to claim 6 allows a high processing speed, as the carriage only has to perform a limited movement.

In a particularly simple embodiment, the carriages arranged on both sides of every other support are connected to each other in order to carry out the transport and return movement together and synchronously.

A particularly simple control device for opening and closing the presses is set out in claim 10.

Other preferred embodiments are set out in the other dependent claims.

The invention will now be explained in more detail by means of an example shown in the drawing. In this case, only the following is shown diagrammatically:

Figure 1 is a perspective view of an embodiment of a collecting drum;

Figure 2 is an enlarged vertical section along the line II-II in Figure 1;

Fig. 3 is a longitudinal section along the line III-III in Fig. 2;

Figure 4 is a perspective and simplified view of a portion of Figure 3;

Figures 5 and 6 are an enlarged section along the line V-V in Figure 3 of the points indicated by the references B and D in Figure 2, with one and two printing sheets placed on the support, respectively;

Figure 7 is a further development weight sheet feed path; and

Fig. 8 is a perspective side view of a part of the weight sheets arranged in the drum according to Fig. 1.

Figure 1 shows a rack 10 rotatably mounted in the impeller-like keräämisrumpu rotatably driven 12, wherein a plurality of extending the drum 12 in the longitudinal direction 10 of the aid 14, which together rotate in the direction of arrow U direction of the axis of rotation over 16 Keräämisrummun 12 is of the ten between the axis of rotation 16 in the direction distance, schematically shown in a feeder 18 which can be driven synchronously by a common drive shaft 20. Keräämisrummun 12 of the second end region (arrow F direction from the needle block), a removal device 22, which is also shown only schematically. The construction and operation of such supply and discharge devices 18, 22 are generally known, and are described, for example, in DE-3 620 945 or a similar patent.

U.S. Pat. No. 4,684,116. The feeders 18 convey folded printing sheets 24 to a collection drum 12, where they are opened and placed from the feeders 18 on supports 14 on the collection drum 12 25 or on the printing sheets 24 thereon, also by means of a schematically shown opening device 26. As seen from the direction of the arrow F, the first input device 18 sets the direction of rotation U keräämisrummun 12 rotates for each feed device 18 by passing the support 14, the printing sheet 24 feet apart. During Keräämisrummun 12 round these painoar30 kit 24 travel direction of arrow F along a path helically next to the feeding device 18, which is also set for each of a printing 24 of the second printing sheet, which then together with the next cycle is moved to the next input device 18. This is repeated, as shown in Figure 35 1 shows that until the ten printing sheets 24 overlap.

During the next two rounds, the printing sheets 24 thus assembled are conveyed to a removal device 22, where the latter grips them and transports them away. In the area between the feeders 18 and the discharge device 22, the overlapping printing sheets 24 can be stapled or otherwise treated.

Figure 2 shows the collecting drum 12 in vertical section. The collecting drum 12 has spool wheels 28, of which only one is shown in broken lines in this figure. These spool wheels 28 are rotatably mounted on a hollow shaft 30 supported on a bracket 10 and centered on the axis of rotation 16 (Figure 1). Arranged on the circumferences 32 of the spool wheels 2 8 are axially spaced C-shaped rails 34. Viewed in the radial direction, a saddle-shaped support 14 in cross section is attached to each rail 34. Each rail 34 carries a carriage 36, with only one of these carriages 36 shown in Figure 2. These carriages 36 are explained in more detail below. Here, it is sufficient to know that each of these carriages is provided with clamping tongues 38 which can be moved by the control device 40 from the open position to the closed position and vice versa.

In each case, two carriages 36 running on adjacent rails 34 are connected together by tripods 42. Each tripod 42 is provided with a radially inwardly facing gripper 44 guided by a guide rail 46 which is arranged radially on the guide cylinder 48 of the guide cylinder 48. The steering cylinder 48 is conventionally arranged on a stationary hollow shaft 30.

The direction of arrow F (see FIG. 1) the outermost arranged bobbin wheel 28 is attached to a chain wheel 49 which toimin93098 socially is connected to a rack 10 fixed to the gear unit shown in dashed lines 50 by a chain drive 52. The gear 50 is also a rack 10 fixed to a drive motor 54 in the second, likewise in dashed lines osoi5 tetulla chain drive 56 .

The input device 18 is extending guides 58 ending, in broken lines the pulling device 60, which is arranged at fixed distances in a row individually control devices 10 grips 62. The traction device 60 is derived from the drive shaft 20 fixed to the drive plate 64, by means of a pulling device 60 can be used in the direction of arrow Z direction. Each gripper 62 introduced into the collection drum 12 holds the printing sheet 24 from its fold 66. Opposite free, weight 15 downwardly hanging ends 68 of the weight sheets 24 pass through the guide plate 70 of the opening device 26 so that the ends 68 extend in front of the folds 66. Viewed in the feed direction Z, at the end of the guide plate 70 is a rotating, used opening roller 72 with controllable presses 74. The end 68, 20, which slides on the guide plate 70, is gripped by the press plate 70 by a press 74 and bent around the casing of the opening roll 72 so that the two printing sheet halves 76 at least in the region of the ends 68 diverge, opening the printing sheet 24.

As soon as the collecting drum 12 rotates in the direction of rotation U 25 the support 14 has gone into the opened printing sheet 24, the respective press 74 releases the end 68 of the printing sheet half 76 so that each printing sheet half 76 reaches the support side 14. As soon as the respective gripper 12 is approximately vertical above, it opens, and the released printing sheet 24 falls on the support 14 and comes against it. Similar opening devices are described in more detail in EP 0 095 603 and EP-0 208 081 or in the corresponding U.S. Patents 4,489,930 and 4,684,117.

In each case, the clamping tongues 38 located in the upper area of ​​the collecting drum 12 are in the open position, as shown in the area indicated by A. In the area indicated by B, the pressing tongues 38 are moved by the control device 40 to their pressing position, which remains in force during the lower half C of the orbit. In area D, the clamping tongues 38 are then again moved to their open position.

Figure 3 shows a part of the collecting drum 12 in longitudinal section along the line III-III in Figure 2. The spool wheel 28 shown in Fig. 3 is rotatably mounted on a hollow shaft 30, and its hub 78 is provided with a sprocket 49 of a chain drive 52 fixedly rotationally (see Fig. 2). Attached to the circumference 32 is a C-shaped rail 34 in which the supports 14 are located. The rail 34 is traversed by three carriages 36, shown in this figure and connected to each other by coupling members 82. Each carriage 36 has three or two pairs of guide wheels 84 rotatably mounted thereon which run on a rail 34. Each carriage 36 is pivotally mounted on two clamping tongues 38 which can be moved from their open position to the closed position and back by means of guide rails 86 (see Figure 2) connected to each other.

Each rail body 86 is mounted, in the same way as a parallel crank drive, on two parallel pivot arms 88, which in turn are pivotally mounted on the rail 34 and parallel to each other. In Fig. 3, the pivot lever shown at the left end of the collection drum 12 and indicated by reference 88 'is formed as an angle lever operatively connected to a circumferentially mounted bearing two-arm control lever 92 by a rotary rod 90, the other arm of which is rotatably mounted on a guide wheel 94. At one end, a compression spring 98 attached to the rail 34 and acting on the pivot lever 88 'at the other end presses the tracking wheel 94 against the guide surface 96 of the link while biasing the clamping tongues 38 toward the open position.

Of all the carriages 36 running on the rail 34, only the carriage in the region of the steering cylinder 48 has a stand 42 by which it is connected to the adjacent carriage 36 as seen in the direction of rotation U (cf. Fig. 2). The gripper 44 arranged on the stand 42 passes in a closed guide slide 46 arranged on the jacket surface of the guide cylinder 48, which in each direction has a strong curvature in the direction of the axis of rotation 16 and a region with a constant pitch with respect to the direction of rotation U in each direction (only 3 is shown in Fig. 3).

The support 14 shows, in broken lines, the folded weight sheets 24 fed from the feeders 18 (see Fig. 1) and held by the clamping tongues 38, with a single weight sheet 24 on top of the support 14, the second clamping tongue 38 overlapping two on top of each other in the transport direction F the printing sheet 24, the third pressing tongue 38 three, etc. In Fig. 3, the weight sheets 24 indicated in each case, moved to the left, are on the support 14 in the direction of rotation U (see Fig. 2 here).

Figure 4 shows a part of the left side of Figure 3 in perspective and enlarged, with the carriage 36 shown in partial section. The same parts are indicated by the same reference numerals as in Fig. 3. These are discussed only as much as is necessary to understand Fig. 4. The opposing ends of the C-shaped rails 34 each support a guide profile 100, which is, for example, made of plastic. The wheels of the guide wheel pairs 84 rotatably mounted on the carriage 36 are formed concave so that they partially engage around the guide profile 100, securely holding the carriage 36 in the perpendicular direction of the rail 34. The rails 34 are pivotally mounted on pivot levers 88, 88 ', the free ends of which are pivotally connected to the rail body 86. The rail body 86 is also C-shaped in cross section, the upper side 86' being cut off in each case in the pivot levers 88, 88 '. The connecting piece is designated 102 ', which connect the rail body 86 in the direction F as seen from the next rail element 86. The pivot levers 88, 88' turned in Figs position shown clockwise 3 and 4, to carry rail element 86 of the parallel crank mechanism-like movement, and thus also the pushing movement of the arrow H direction (radially outwardly from ). This movement of the rail body 86 is controlled by a sliding tracking wheel 94 on a link 96, the movement of which is transmitted through the control levers 92 and the crankshaft 90 to the pivot lever 88 'formed as an angle lever.

The carriage 36 has a flat wall element 104 on which a pair of guide wheels 84 are mounted. Arranged on the side of the wall element 104 facing the rails 34 is an upwardly angled guide element 106 forming a bottom pocket, which is cut open in the region of the clamping tongues 38. The compression tongues 38, which are preferably made of spring steel, are attached to a shaft 110 rotatably mounted on the wall element 104 by bearing members 108 extending in the longitudinal direction of the rails 34. The upwardly projecting free ends of the compression tongues 38 may have a compression coating, for example rubber. Approximately in the middle between the two clamping tongues 38, a lever arm 112 pointing towards the rail body 86 is fixed to the shaft 110, at the free end of which a wheel 114 guided in a C-shaped rail body 86 is rotatably mounted. The carriage 36 moving in the direction of the arrow F and against the wheel 114 slides on the rail paragraph 86, and raising or lowering of the rail tracks 86 in the direction of arrow H against it, while the two press 38 languages ​​folding the open or closed position.

The rail support 34, and rotates in the direction of arrow U carriage 36 in the direction of the arrow F to perform the feed movement, and in a reverse direction in accordance with the return movement of the control cam 46, which slides tar should: 44. Also in this figure 4, as in figure 3, the separate or overlapping weight sheets 24 placed on the support 14 are shown in dotted lines. It should be noted that each pressing tongue 38 presses the trailing printing sheet halves 76 of the printing sheet 24 placed on the support 14 and the printing sheet halves 76 of the printing sheet 24, viewed in the direction of rotation U, placed on the support 14 after this support 14 (not shown), these printing sheets 24 as seen in the direction of the arrow F are arranged offset in relation to each other. This also applies to the printing sheet 24 shown on the right side in Fig. 4, which, however, is shown in section on its right edge. For the sake of completeness, it should be noted that each support 14 of the collecting drum 12 with its associated rail 34, with its carriages 36 and control devices 40 is similar in structure to the support 14 shown in Figures 3 and 4.

Fig. 5 shows a section along the line V-V in Fig. 3 through a plurality of supports 14 of the collecting drum 12, the supports 14 being in the region B of Fig. 2. The rails 34 are fixed to the circumference 32 of the spool 28 (see Figs. 2 and 23). outwardly cross-sectional supports 14 in the saddle shape. Guide profiles 100 are arranged at the opposite ends of the rails 34, in which pairs of guide wheels 84 run. The pairs of guide wheels 84 are rotatably mounted on the respective wall element 104, to which are attached a guide element 106 and a bearing element 108, of which only one can be seen in each case in Fig. 5 for each carriage 36. It should be noted that the upper end of the guide element 106, seen in the direction of rotation U, extends behind the front edge 109 of the next support 14. Likewise, the upper end of the wall element 104 is covered by a corresponding support 14, so that when the printing sheets 24 are placed on the supports, they are easily placed in the area of ​​the pressing tongues 38. The clamping tongues 38 are attached to the bearing elements 108 on mounted shafts 110, from which the lever arm 112 protrudes towards the rail body.

86. At the free end of the lever arm 112 is a rotatably mounted wheel 114 which runs on the respective rail body 86 and has a convex running surface. In this Figure 5, the suspension or actuators of the body 86 are not shown. Figure 5 shows the left side of the rail element 86 is located in the upper direction of the arrow H, the radially outer extreme position, so that the compression languages ​​are auklasennossa 38, wherein the free ends 38 purlstuskielten direction of rotation with respect to the U have a control element 106 to the rear. shown in this figure, the left rail element 86 is located contrary to the direction of the arrow H in the lower, radially inner ääräiasennossa, wherein the respective pressing languages ​​38 is moved to the closed position, wherein the compressive painoarkkipuolikkaita 76, 76 '104 formed between the response of the languages ​​and of the wall element. It should be noted that each support 14 in each case has a single printing sheet 24 with scattered holes, and that each pressing tongue 38 presses the printing sheet halves 76, 76 'of the two different printing sheets 24, namely the rear printing sheet 76 76 '.

Since the supports 14 shown in Fig. 5 are located in the area B of Fig. 2, the advancing printing sheet halves 76 'are located on top of the advancing printing sheet halves 76 of the advancing printing sheets 24 due to their own weight, so that no tension is applied to the printing sheets 24 when the pressing tongues 38 close.

It should be noted that the two carriages 36 shown in Figure 5 are in operative coupling to each other via the stands 42, but that the rail pieces 86 of the two carriages can still be guided independently of each other. It is particularly clear from this figure that the gripper 44 has a wheel which runs parallel to two guide cylinders 48, guided by a circular profile of circular cross-section, the opposing surfaces of which form a guide bar 46. Reference numeral 82 denotes clutch members 36 by means of rail 34 connected to each other.

Fig. 6 shows the same section as Fig. 5, but with two scattered overlapping printing sheets 24, 24 'placed on each support 14, and the supports 14 are located in the area D of Fig. 2. For a detailed description of this figure, reference is made to Fig. 5. the figures are similar. U direction of rotation as seen from above, extend the compression languages ​​38 are in the open position, because the rail element 86 as viewed in the direction of the arrow H in the upper, radially outer extreme position suunassa. Due to the sole nature of the printing sheet halves 76, 76 ', they now rest on the guide element 106. Viewed in the direction of rotation U, the rear clamping tongues 38 are still in their closed position and clamp between the tongue and the wall element 104 the successive or forward weight sheet halves 76, 76 'of each of the two overlapping printing sheets 24.

Fig. 7 is a schematic view, simplifying the flow of collection by means of a development, in which case only the area of ​​the first two feeders 18 (Fig. 1) is shown. The course of the control link 46 is shown by dotted lines and the line indicated by reference numeral 46. The grippers 44 guided by the guide link 46 are indicated by dots, with each gripper 44 inserting the carriages 36 of two successive supports 14 (see also Figures 5 and 6). The lines indicated by reference numeral 36 describe the carriages of every other support 14. In each case, one carriage with two clamping tongues 38 is shown per support 14. The direction of rotation is denoted by U, and the direction of transport by F. The arrows marked with the letters AD refer to the areas similarly shown in Figure 2.

The device according to Figures 1 to 7 operates as follows: As can be seen in particular from Figure 2, the collecting drum 12 is driven by the drive motor 54 in the direction of rotation U. The grippers 44 then travel in the guide cylinder 46 of the steering cylinder 48. As this guide cylinder 48 remains stationary, the carriages perform one transport and one the return movement in the direction of the arrow F, or against it (see. Figure 7). The distance then traveled in the other direction is slightly longer than the respective distance between the two feeders 18. The control cylinder 48 is then placed so that the carriages 36 during one revolution of the upper half (between D and B), the perform substantially the direction of the arrow F the return movement against, and in the lower half (between B and D) to the arrow direction F carrier, wherein it is noted that the clamping tongues 38 are in the open position throughout the return movement.

The area A (see Figs. 2 and 7) are placed in the direction of the arrow F from the first feed device 18 of each support 14 opened to the printing sheet 24 astride the corresponding carriage with newly clamping tongue 38 is reverse circulation printed sheets 24 below. The printing sheets 24 are not affected by the carriage 36 during its return movement, because all parts of the carriage 36 are retracted relative to the saddle-shaped supports 14 or arranged radially inwards. Continued rotation of the rotation direction of the U towards the area B after passing the direction of arrow U in each case the posterior printed sheets 24 painoarkkipuolikkaat 76 'settle under its own weight against the wall 36 of the carriage elements (see. In this case also Figure 5). In area B, the pressing tongues 38 of all the carriages 36 belonging to the support 14 are now moved together from their open position to the closed position. It is to be noted that the compression languages ​​38 may be moved to its closed position only when the direction of the arrow F of view they have the same speed as the above-extending, 38 is already retained by a printing press tongues 24. Since then kukevat in each case on the Printing sheets 24 in time to be involved at earlier times than that of the coming Printing sheets 24 , these printing sheets 24 are offset relative to each other, as shown in particular in Figures 4 and 57. Printing sheets 24 thus formed in a zig-zag-shaped array, wherein in each case two in the direction of the arrow F adjacent print sheet 24 are offset relative to one another to the side. Return movement continues between the regions B and D, the carriages 36 carrying out movement of the carriage, which leads to storage of GDP that a zig-zag-shaped string jointly transported in the direction of the arrow F following the input device 18 of the box.

In area D, all the clamping tongues 38 of the carriages 36 belonging to the same support 14 are now opened together. This must take place before the two clamping tongues 38 holding the 15 printing sheets 24 of each printing sheet half 76, 76 'have moved relative to each other. This means that the clamping tongues 38 are opened before said carriages 36 have stopped to begin their return movement; thus, the clamping tongues 38 of said carriages 36 must be in the closed position only as long as the grippers 44 of these carriages 36 are in the region of the guide slide 46 with a constant pitch (cf. Fig. 3).

By opening the pressing tongues 38 on the support sheet 14 in question, the printing sheets 24 and the printing sheet halves 76 upstream of the printing sheets 24 on the trailing support 14 are released. Consequently, the released Printing sheets 24 moving from exhaustion, only the direction of rotation U, but that they are no longer transported in the direction of the arrow F, that while 30 lead to the fact that all of the D released in Printing sheets 24 become the direction of arrow F in the same position, and are not subjected between the points D and B no more movement in the direction of the arrow F. As soon as the two grippers 44 guided by the carriages 36 of the clamps 38 are open, these feeders 35 36 braked and accelerated in the direction of arrow F against which the carriages 36 to start the return movement.

95098

Thus, in each case, during one revolution of the collecting drum 12, on top of the printing sheets 24 conveyed from the first feeding device 18 to the next feeding device 18, the second printing sheets 24 'are always placed overlapping and scattered. Overlapping Printing sheets 24, 24 * now pressed analogously as described above, first passing above painoarkkipuolikkaasta 76 ', the direction of arrow F side offset, and also the rear recording sheet half 76 is clamped, is transported in the arrow direction F to the next input device 18, which sets the other printed sheets. This is repeated until, as shown in Fig. 1, the ten printing sheets 24, 24 'in each case overlap. During the next two rounds, these collected weight sheets 24, 24 'are conveyed to a discharge device 22, where they are picked up by its grippers and and transported away when collected.

Figure 8 is a perspective view of a series of printing sheets 24 in the form of a zigzag between the feeders 18. In this case, the axis of rotation 16 (see Fig. 2) is indicated by dashed lines.

The direction of rotation is indicated by U and the direction of transport by F. It should be noted that between the points marked A and B, the side edges of the printing sheets 24 face each other and are thus not subjected to any displacement of the conveyor F. B: characters in the printed sheets are transferred in each case 24 as seen in the direction of the arrow F relative to each other, and this is considered a transitional point to D, wherein this shift can be corrected again.

Keräämisrumpu 12 (see FIG. 1) can be assembled in the arrow F direction of the compartments. The width of the base compartment is preferably the width of three handling stations (two feeders 18 and one discharge conveyor 20). For example, compartments the width of one or two processing stations (feeder 18) can be connected to these or to these basic compartments. Thus, according to the functions to be performed in each case, such compartments can be assembled into a longer collecting drum 12, for example according to the number of stackable printing sheets 24, 24 '. In this case, the carriages 36 and the rail pieces 86 belonging to each support 14 can be connected together by coupling members 82 or connecting members 102, for their simultaneous movement. Subsidies 14, of course, consist of sections of similar length.

In connection with the collecting drum 12 of a predetermined length, only one carriage 36 with more than two clamping tongues 38 can be provided per support. In this case, the rail pieces 86 can be portions of the same unitary rail for each support. Likewise, it is possible that each carriage 36 has only a single clamping tongue 38, and thus a corresponding number of carriages 36 are connected to each other per support 14.

Of course, it is also conceivable for each printing sheet 24, 24 'to be held in place by more than one pressing tongue 38. It is also conceivable for each feeding device 18 to feed a plurality of nested printing sheets 24, 24'.

Finally, the hollow shaft 30 and the guide cylinder 48 and / or the slide 96 can be rotatably arranged relative to the axis of rotation 16 to accommodate carriages 36 or compression tongues 38 independently of the respective geometry of the feeder 18 and discharge device 22 and the size of the sheets 24, 24 'to be processed. The slide 96 may be formed so that its guide surface can be changed, or it can be changed to another slide 96, to bypass the locations of the closing or opening movements of the pressing tongues 38.

For example, the rail bodies 86 can also be formed L-shaped. This is especially the case when the lever arms 112 are biased in the second direction of rotation and when the wheels 114 press the sides of the rail bodies 86.

The movement of the rail pieces 86 can also take place in a direction other than radial H. Its direction only needs to be perpendicular to the direction of movement of the carriage 36.

In addition, the feeding devices 18 could be replaced by known subdividers which feed the printing sheets 24, 24 'onto the supports.

The possibility of using the collecting device of EP 00 95 603 or the corresponding U.S. Pat. This can be important, for example, if errors occur in the layout of the printing sheets, or when several similar printing sheets have to be placed on top of each other, so that the printing sheets already placed on top of the supports have to be moved again to the top.