JP2009096630A - Sheet lamination forming device and rotary printing press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve quality of product by stably conveying a sheet in a sheet lamination forming device and a rotary printing press. <P>SOLUTION: The rotary printing press is provided with high-speed conveying belts 39, 40, 41, 42, 43 for conveying a signature S at a high-speed, and low-speed conveying belts 44, 45, 46, 47 which are provided at a downstream side of the conveying direction of the signature S from the high-speed conveying belts 39, 40, 41, 42, 43 and supports the signature S at an upper surface part to convey at a low speed. The rotary printing press is provided with a kicker 62 which presses downward a rear end part of the signature S conveyed by the high-speed upper conveying belts 39, 41 and a decelerating rollers 63, 64 which reduce the speed by holding the rear end part side of the signature S from the kicker 62 to the upstream side of the conveying direction of the signature S. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sheet stacking apparatus for wrapping continuously conveyed sheets and signatures, and a rotary printing press having the sheet stacking apparatus.

  In general, an offset rotary printing press includes a paper feeding device, an infeed device, a printing device, a drying device, a cooling device, a web pass device, a folding device, and a paper discharge device. The paper feeding device has a reel stand on which two winding bodies (web rolls) are mounted, and a web that is drawn out of one winding body and is running is used as the web of the other winding body. By connecting, it has a printing machine that can continuously supply the web. The in-feed device supplies a web drawn from a winding body of a paper feeding device to a printing device at a predetermined speed. In the printing apparatus, generally, four sets of printing units corresponding to four colors of black, cyan, magenta, and yellow are arranged in parallel along the web traveling direction. The drying device is for drying ink on the web printed by the printing device, and the cooling device is for cooling the web that stores excess heat after drying in the drying device to an appropriate temperature. It is. The web pass device conveys a dried and cooled web, and the folding device cuts the web after being vertically folded and folds it to a predetermined size to form a fold. The paper device carries out the folded signature in a predetermined form.

  Therefore, a roll-shaped web is pulled out from the winding body by the paper feeding device, the web is supplied to the printing device at a predetermined speed by the infeed device, and multicolor printing is performed by each printing unit in the printing device, The printed web is dried with ink by a drying device, cooled with a cooling device, a crease is created by a folding device conveyed through a web pass device, and is carried out in a predetermined form by a paper discharge device.

  In such an offset rotary printing press, the paper discharge device cuts a web that has been dried and cooled after printing into a predetermined length, folds the web to form a fold, and then folds the fold into a predetermined length. It is just wrapped and overlapped, and finally stacked vertically and discharged in blocks. An example of such an offset rotary printing machine is described in Patent Document 1 below.

  A paper discharge device for a rotary printing machine described in Patent Document 1 is provided with a low speed belt and a high speed belt above the entrance side of the low speed belt, and the upper and lower sides of the preceding paper and the next paper above the entrance side of the low speed belt. In addition to providing a snubber that keeps the relationship constant, a braking roller is provided above the low-speed belt on the exit side of the low-speed belt, and the paper is primarily decelerated above the low-speed belt between the snubber and the braking roller. By providing the slow-down pulley, after the paper is dropped onto the low-speed belt by the snubber, the paper is decelerated two steps by the slow-down pulley and the braking roller and discharged.

Japanese Patent No. 2708243

  In the above-described conventional rotary printing press paper discharge device, when paper is dropped onto a low speed belt by a snubber and then decelerated two steps by a slowdown pulley and a braking roller, the leading edge of the paper hits the braking roller. This reduces the impact of the paper and can prevent paper damage.

  However, when the paper is decelerated, it is difficult to convey the paper in a stable state even if a slowdown pulley or a braking roller is pressed against the paper. That is, in the conventional paper discharge device, the paper is dropped onto the low speed belt by a snubber and then decelerated by pressing the leading edge side of the paper with the slow-down pulley. Therefore, the rear end side of the paper is not decelerated, and the paper may bend up and down or may be damaged in the width direction.

  In addition, the paper is continuously conveyed to the paper discharge device. Like the conventional paper discharge device, the paper is dropped onto the low speed belt by a snubber and then decelerated by the slowdown pulley before being discharged. There is a possibility that the trailing edge of the paper to be touched contacts the leading edge of the next conveyed paper, and the edge of the paper is broken and damaged. In this case, when the paper is a web, the paper to be transported has a winder, and thin paper and folded folds have a low back edge, so they are dropped by a snubber. In this case, the rear end side may be violently brought into contact with the leading edge of the next conveyed paper, which may cause folding or paper jam.

  SUMMARY An advantage of some aspects of the invention is that it provides a sheet stacking apparatus and a rotary printing machine that improve product quality by stably conveying sheets.

  In order to achieve the above object, the sheet stacking and forming apparatus of the invention of claim 1 is a sheet stacking and forming apparatus that wraps at least a part of continuously transported sheets. A belt, a low-speed conveyance belt that is provided on the downstream side of the high-speed conveyance belt in the sheet conveyance direction and supports the sheet on the upper surface portion and conveys the sheet at a low speed, and a rear end portion of the sheet conveyed by the high-speed conveyance belt And a reduction mechanism that is provided on the upstream side in the sheet conveyance direction from the sheet pressing mechanism and that decelerates by sandwiching the trailing end side of the sheet.

  In the sheet stacking and forming apparatus according to a second aspect of the present invention, the speed reduction mechanism rotates at a lower speed than the sheet conveyance speed by the high-speed conveyance belt and at a higher speed than the sheet conveyance speed by the low-speed conveyance belt, thereby passing the sheet conveyance path. It has a pair of speed reduction rollers provided so as to be opposed to each other, and is provided with a holding portion for holding the sheet for a predetermined time on an outer peripheral surface on at least one side of the pair of speed reduction rollers.

  In the sheet stacking and forming apparatus according to a third aspect of the present invention, the sheet push-down mechanism pushes down a rear end portion of the sheet released from being pinched by the pair of reduction rollers.

  According to a fourth aspect of the present invention, there is provided a sheet stacking and forming apparatus including a sheet holding mechanism that holds a rear end portion of the sheet pushed down by the sheet pushing mechanism and prevents the sheet from lifting.

  In the sheet stacking and forming apparatus according to a fifth aspect of the present invention, the sheet holding mechanism includes a guide member that locks a width direction end portion of the rear end portion of the sheet.

  In a sheet stacking and forming apparatus according to a sixth aspect of the present invention, the sheet holding mechanism has a guide moving mechanism capable of moving the guide member up and down in accordance with a sheet conveying speed.

  In the sheet stacking and forming apparatus according to a seventh aspect of the present invention, the sheet pressing mechanism includes a first sheet pressing mechanism and a second sheet pressing mechanism that are arranged side by side from the upstream side to the downstream side in the sheet conveying direction. Yes.

  In the sheet stacking and forming apparatus according to an eighth aspect of the present invention, the first sheet pressing mechanism and the second sheet pressing mechanism include a first cam roller and a second cam roller that rotate in synchronization with sheet conveyance, A first protrusion and a second protrusion are provided on the outer periphery of the one cam roller and the second cam roller to push down the rear end portion of the sheet, and the second protrusion is formed on the sheet conveyed by the high-speed conveyance belt. The first protruding portion pushes down the rear end portion of the sheet after the rear end portion of the sheet is pushed down.

  According to a ninth aspect of the present invention, there is provided a sheet stacking and forming apparatus for wrapping at least a part of continuously transported sheets. The sheet stacking and forming apparatus includes: a high-speed transport belt that transports a sheet at a high speed; A low-speed conveyance belt that is provided on the downstream side in the sheet conveyance direction and supports the sheet at the upper surface portion and conveys the sheet at a low speed; a sheet push-down mechanism that pushes down a rear end portion of the sheet conveyed by the high-speed conveyance belt; And a sheet holding mechanism that holds the rear end portion of the sheet that is pressed down below the sheet pressing mechanism and prevents the sheet from rising.

  In a sheet stacking and forming apparatus according to a tenth aspect of the present invention, the sheet holding mechanism has a guide member that locks a width direction end portion of a rear end portion of the sheet.

  In a sheet stacking and forming apparatus according to an eleventh aspect of the present invention, the sheet holding mechanism includes a guide moving mechanism capable of moving the guide member up and down in accordance with a sheet conveying speed.

  A rotary printing press according to a twelfth aspect of the present invention is a paper feeding device that supplies a web, a printing device that performs printing on the web supplied from the paper feeding device, and printing performed by the printing device. A drying device that dries the web ink, a folding device that cuts the web dried by the drying device to form a predetermined fold, and a stack that discharges the folded folds formed by the folding device. In a printing machine including a paper device, the paper discharge device includes a stacking device that wraps a part of a fold that is continuously transported, and the stacking device transports a sheet at high speed. A belt, a low-speed conveyance belt that is provided on the downstream side of the high-speed conveyance belt in the sheet conveyance direction and supports the sheet on the upper surface portion and conveys the sheet at a low speed, and a rear end portion of the sheet conveyed by the high-speed conveyance belt Push down And over preparative depressing mechanism, it is characterized in that it has a reduction mechanism that decelerates to sandwich the rear end of the seat provided on the upstream side in the sheet conveyance direction than the sheet depressing mechanism.

  According to a thirteenth aspect of the present invention, a rotary printing press includes a paper feeding device that supplies a web, a printing device that performs printing on the web supplied from the paper feeding device, and printing performed by the printing device. A drying device that dries the web ink, a folding device that cuts the web dried by the drying device to form a predetermined fold, and a stack that discharges the folded folds formed by the folding device. In a printing machine including a paper device, the paper discharge device includes a stacking device that wraps a part of a fold that is continuously transported, and the stacking device transports a sheet at high speed. A belt, a low-speed conveyance belt that is provided on the downstream side of the high-speed conveyance belt in the sheet conveyance direction and supports the sheet on the upper surface portion and conveys the sheet at a low speed, and a rear end portion of the sheet conveyed by the high-speed conveyance belt Push down And over preparative depressing mechanism, it is characterized in that it has a, a sheet holding mechanism for preventing floating holds the rear end of the sheet is pushed down from the sheet depressing mechanism.

  According to the sheet stacking and forming apparatus of the first aspect of the present invention, a high-speed conveyance belt that conveys the sheet at a high speed, and a low-speed sheet that is provided downstream of the high-speed conveyance belt in the sheet conveyance direction and supports the sheet at the upper surface portion. A sheet-lowering mechanism that pushes down the trailing edge of the sheet conveyed by the high-speed conveying belt, and a sheet trailing mechanism provided upstream of the sheet-pressing mechanism in the sheet conveying direction. And a speed reduction mechanism that decelerates by sandwiching the part side. Accordingly, the sheet is conveyed at a higher speed than the high-speed conveying belt, and the decelerating mechanism pinches the trailing end side of the sheet and decelerates the sheet to stabilize the posture. In this state, the sheet pressing mechanism However, the rear end of the sheet is pushed down, the sheet is transferred to the low-speed conveying belt and conveyed at a low speed, and the sheet can be appropriately wrapped, thereby improving the product quality.

  According to the sheet stacking and forming apparatus of the invention of claim 2, the speed reducing mechanism is rotated at a speed lower than the sheet conveying speed by the high-speed conveying belt and at a speed higher than the sheet conveying speed by the low-speed conveying belt, and the sheet conveying path is A pair of reduction rollers provided opposite to each other is provided, and a holding portion for holding the sheet for a predetermined time is provided on the outer peripheral surface of at least one side of the pair of reduction rollers. A pair of reduction rollers that rotate at a predetermined speed with respect to the sheet is held and decelerated for a predetermined time, and the sheet can be appropriately decelerated with little influence on the sheet conveyance posture. it can.

  According to the sheet stacking and forming apparatus of the third aspect of the invention, the sheet push-down mechanism pushes down the rear end portion of the sheet released from being pinched by the pair of speed reduction rollers. In this state, the rear end portion is pushed downward by the sheet push-down mechanism, and the sheet can be appropriately separated from the high-speed conveyance belt.

  According to the sheet stacking and forming apparatus of the fourth aspect of the present invention, the sheet holding mechanism that holds the rear end portion of the sheet pressed downward by the sheet pressing mechanism and prevents the sheet from rising is provided. After the sheet is pushed down further, the trailing edge of the sheet is held by the sheet holding mechanism to prevent the sheet from lifting, and the sheet is stably conveyed to avoid contact with the next sheet to be conveyed. In addition, the sheet can be prevented from being damaged.

  According to the sheet stacking and forming apparatus of the fifth aspect of the present invention, the guide member that locks the width direction end portion of the rear end portion of the sheet is provided as the sheet holding mechanism. The end portions in the direction are locked, and the lateral fluctuation of the sheet is suppressed, and the contact with the next conveyed sheet can be prevented appropriately.

  According to the sheet stacking and forming apparatus of the sixth aspect of the invention, since the guide moving mechanism capable of moving the guide member up and down according to the sheet conveying speed is provided as the sheet holding mechanism, the sheet conveying speed is controlled by the guide moving mechanism. Accordingly, it is possible to adjust the movement of the guide member in the vertical direction, and it is possible to appropriately suppress the ramping of the rear end portion of the sheet.

  According to the sheet stacking and forming apparatus of the invention of claim 7, since the first sheet pressing mechanism and the second sheet pressing mechanism arranged from the upstream side in the sheet conveying direction to the downstream side are provided as the sheet pressing mechanism, The rear end portion is continuously pushed downward by the first sheet push-down mechanism and the second sheet push-down mechanism, and this sheet can be stably transferred to the low-speed conveyance belt and conveyed at low speed.

  According to the sheet stacking and forming apparatus of the eighth aspect of the present invention, the first cam roller and the second cam roller that rotate in synchronization with the conveyance of the sheet are provided as the first sheet pressing mechanism and the second sheet pressing mechanism. And a first protrusion and a second protrusion that push down the rear end of the sheet on the outer periphery of the second cam roller, and the second protrusion pushes the rear end of the sheet downward with respect to the conveyed sheet. Thereafter, since the first protrusion pushes down the rear end of the sheet, the sheet is pushed back by the first protrusion of the first cam roller after the rear end of the sheet is pushed down by the second protrusion of the second cam roller. The end portion is pushed down, so that the sheet can be stably conveyed over a long period of time and appropriately transferred to the low-speed conveying belt.

  According to the sheet stacking and forming apparatus of the ninth aspect of the invention, a high-speed conveyance belt that conveys the sheet at a high speed, and a low-speed sheet that is provided downstream of the high-speed conveyance belt in the sheet conveyance direction and supports the sheet on the upper surface portion. A low-speed conveyor belt that conveys the sheet, and a sheet push-down mechanism that pushes down the rear end portion of the sheet conveyed by the high-speed convey belt, and a rear end portion of the sheet that is pushed down from the sheet push-down mechanism. And a sheet holding mechanism for preventing lifting. Therefore, when the sheet pressing mechanism pushes the trailing end of the sheet downward and separates the sheet from the high-speed conveying belt with respect to the sheet conveyed at a higher speed than the high-speed conveying belt, the trailing edge of the sheet is moved by the sheet holding mechanism. The sheet is held and prevented from being lifted, and the sheet is stably conveyed to prevent contact with the next sheet to be conveyed, and the sheet is transferred to the low-speed conveyance belt and conveyed at low speed. Appropriate lapping can be achieved, and product quality can be improved.

  According to the sheet stacking and forming apparatus of the invention of claim 10, since the guide member for locking the width direction end portion of the rear end portion of the sheet is provided as the sheet holding mechanism, the width at the rear end portion of the sheet by the guide member is provided. The end portions in the direction are locked, and the lateral fluctuation of the sheet is suppressed, and the contact with the next conveyed sheet can be prevented appropriately.

  According to the sheet stacking and forming apparatus of the eleventh aspect of the present invention, it is possible to adjust the guide member up and down according to the sheet conveying speed by the guide moving mechanism, and to appropriately prevent the trailing edge of the sheet from being violated. can do.

  According to the rotary printing press of the twelfth aspect of the present invention, the sheet feeding device, the printing device, the drying device, the folding device, and the paper discharge device are provided, and the stacking device is provided in the paper discharge device. The forming apparatus includes a high-speed conveyance belt, a low-speed conveyance belt, a sheet push-down mechanism that pushes down a rear end portion of a sheet conveyed by the high-speed conveyance belt, and an upstream side of the sheet conveyance direction from the sheet push-down mechanism. A reduction mechanism that decelerates by sandwiching the rear end side of the sheet. Therefore, in the paper discharge device, the sheet posture can be stabilized by decelerating the sheet, which is conveyed at a higher speed than the high-speed conveying belt, by sandwiching the rear end side of the sheet, In this state, the sheet push-down mechanism pushes the rear end of the sheet downward, and the sheet is transferred to the low-speed conveyance belt and conveyed at a low speed, so that the sheet can be appropriately wrapped and the product quality can be improved.

  According to the rotary printing press of the thirteenth aspect of the present invention, the sheet feeding device, the printing device, the drying device, the folding device, and the paper discharge device are provided, and the stacking device is provided in the paper discharge device. The forming apparatus includes a high-speed conveyance belt, a low-speed conveyance belt, a sheet push-down mechanism that pushes down a rear end portion of a sheet conveyed by the high-speed conveyance belt, and a rear end portion of the sheet that is pushed down by the sheet push-down mechanism. And a sheet holding mechanism that prevents lifting. Accordingly, when the sheet is conveyed at a higher speed than the high-speed conveying belt in the paper discharge device, the sheet pressing mechanism pushes the trailing end of the sheet downward and separates the sheet from the high-speed conveying belt. The trailing edge of the sheet is held and lifting is prevented, and the sheet is stably conveyed to prevent contact with the next sheet to be conveyed. The sheet can be properly wrapped and the product quality can be improved.

  Exemplary embodiments of a sheet stacking apparatus and a rotary printing press according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example.

  1 is a schematic front view illustrating a sheet stacking apparatus according to Embodiment 1 of the present invention, FIG. 2 is a schematic plan view illustrating a sheet stacking apparatus according to Embodiment 1, and FIGS. 6 is a schematic diagram illustrating the operation of the sheet stacking apparatus of Example 1, FIG. 4 is a schematic diagram of a folding apparatus to which the sheet stacking apparatus of Example 1 is applied, and FIG. It is the schematic showing the offset rotary printing press with which the lamination | stacking formation apparatus of the sheet | seat was applied.

  The rotary printing press of this embodiment is an offset rotary printing press, and as shown in FIG. 5, a paper feeding device 11, an infeed device 12, a printing device 13, a drying device 14, and a cooling device 15. The web pass device 16, the folding device 17, and the paper discharge device 18.

  The paper feeding device 11 has a reel stand on which two winding bodies (web rolls) are mounted, and a web drawn out from one winding body and traveling is used as a web of the other winding body. By connecting to the web, the web can be continuously supplied. The infeed device 12 supplies the web of the paper feeding device 11 to the printing device 13 side. The printing device 13 has four printing units 21, 22, 23, and 24 for each of four ink colors Cyan, Magenta, yellow, and black along the web running direction. Are arranged side by side. The drying device 14 is for drying the ink on the web that has been printed by the printing device 13, and the cooling device 15 is a suitable temperature for the web that stores excess heat after drying in the drying device 14. It is to cool down. The web pass device 16 conveys the dried and cooled web, and the folding device 17 cuts the web after being vertically folded and folds it to a predetermined size to form a fold. The paper discharge device 18 carries out the folded signatures out of the apparatus in a predetermined form.

  Accordingly, the roll-shaped web W is pulled out from the winding body by the paper feeding device 11 and is supplied to the printing device 13 by the infeed device 12, and in this printing device 13, by each printing unit 21, 22, 23, 24. The multi-color printing is performed, and the printed web W is dried by the drying device 14, cooled by the cooling device 15, and folded by the folding device 17 conveyed through the web pass device 16, and then discharged. It is carried out in a predetermined form by the paper device 18.

  By the way, in the web offset printing press of the present embodiment, the web is vertically folded by the folding device 17 and then cut and horizontally folded to create a signature. A plurality of signatures are stacked in a sashimi shape by stacking the leading end of the subsequent signature on the rear end, and then the plurality of signatures are stacked vertically and discharged in a block shape. It has become.

  Here, the folding device 17 and the paper discharge device 18 in the offset rotary printing press of this embodiment will be described in detail.

  In the folding device 17 and the paper discharge device 18 of the present embodiment, as shown in FIG. 4, two formers (triangular plates) 31 and 32 for vertically folding the web W are provided at the top of the folding device 17. A pair of nipping rollers 33 and 34 is provided below the formers 31 and 32. A cutting cylinder 35 and a receiving cylinder 36 are provided below the nipping rollers 33 and 34 so as to face each other.

  A sheet feeding cylinder 37 is provided below the cutting cylinder 35 and the receiving cylinder 36, and a sorting device 38 is provided adjacent to and below the sheet feeding cylinder 37. The sorting device 38 sorts the signatures that are continuously conveyed from the sheet feeding cylinder 37 to the first conveying path A on the upper side and the second conveying path B on the lower side. Therefore, the first high-speed upper conveying belt 39 is provided on the upper side of the first conveying path A from the receiving cylinder 36 through the sheet feeding cylinder 37, and the lower side of the first conveying path A from the sheet feeding cylinder 37. A first high-speed lower conveyor belt 40 is provided at the position. A second high-speed upper transport belt 41 is provided on the upper side of the second transport path B from the sheet feed cylinder 37, and the second is positioned on the lower side of the second transport path B from the sheet feed cylinder 37. A high speed lower conveyor belt 42 is provided. A high-speed conveyance belt 43 is provided from the cutting cylinder 35 to the sheet feeding cylinder 37 so as to face a part of the first high-speed upper conveyance belt 39.

  A first low-speed upper conveyance belt 44 positioned above the first conveyance path A is provided adjacent to the first high-speed upper conveyance belt 39, and the first conveyance path A is adjacent to the first high-speed lower conveyance belt 40. The 1st low speed lower conveyance belt 45 located in the downward side of is provided. In addition, a second low-speed upper conveyance belt 46 positioned above the second conveyance path B is provided adjacent to the second high-speed upper conveyance belt 41, and the second conveyance is adjacent to the second high-speed lower conveyance belt 42. A second low speed lower conveyor belt 47 located below the path B is provided.

  That is, the first high-speed lower conveyance belt 40 and the first low-speed lower conveyance belt 45 are provided so as to face the first high-speed upper conveyance belt 39 and the first low-speed upper conveyance belt 44, so Is formed, and the second high-speed lower conveyance belt 42 and the second low-speed lower conveyance belt 47 are provided opposite to the second high-speed upper conveyance belt 41 and the second low-speed upper conveyance belt 46, so that the second conveyance of eclectic A path B is formed. The sorting device 38 has a blade that can swing in opposition to the sheet feeding cylinder 37, and swings the blade in a predetermined direction so that the folds to be transported can be conveyed in the first transport path A or the first. 2 can be distributed to the transport path B.

  In the first transport path A and the second transport path B, the first stack is located at a position where the front end of the first low speed lower transport belt 45 overlaps the rear end of the first high speed upper transport belt 39. A forming device (sheet stacking device) 48 is provided. Further, a second lamination forming device (sheet lamination forming device) 49 is provided at a position where the front end of the second low speed lower conveyance belt 47 overlaps with the rear end of the second high speed upper conveyance belt 41. It has been. In each of the stack forming devices 48 and 49, a plurality of signatures are stacked in a sashimi shape by superimposing a leading end of a succeeding signature on a trailing end of a preceding signature. At the rear end of the first transport path A and the second transport path B, a plurality of signatures stacked in a sashimi shape by the respective stack forming devices 48 and 49 are stacked vertically to form a block-shaped bundle. First and second block forming devices 50 and 51 to be put together are provided.

  Accordingly, the web W is vertically and horizontally folded by the formers 31 and 32, and then conveyed while being sandwiched by the nipping rollers 33 and 34, and is cut and folded by the rotating cutting cylinder 35 and the receiving cylinder 36. A cocoon is formed. The signature is sandwiched and conveyed between the first high-speed upper conveyance belt 39 and the high-speed conveyance belt 43, transferred to the first high-speed upper conveyance belt 39 and the second high-speed lower conveyance belt 42, and guided to the sheet feeding cylinder 37. In this way, it is sequentially conveyed to the sorting device 38. In the sorting device 38, the signature is sorted into the first transport path A or the second transport path B by swinging the blade.

  In the first conveyance path A, the signature is sandwiched and conveyed between the first high-speed upper conveyance belt 39 and the first high-speed lower conveyance belt 40, and the first high-speed upper conveyance belt is obtained by the first stack forming device 48. When it is transferred from 39 to the first low-speed conveying belt 45, it is superposed in a sashimi shape. The signatures stacked in a sashimi shape in units of a predetermined number of copies are collected into a predetermined number of block-shaped bundles by the first block forming device 50 and are carried out by a conveyor. Similarly, in the second conveyance path B, the signature is sandwiched and conveyed between the second high-speed upper conveyance belt 41 and the second high-speed lower conveyance belt 42, and the second stack formation apparatus 49 performs the second high-speed conveyance. When the belt 41 is transferred from the belt 41 to the second low-speed lower conveyance belt 47, it is superposed in a sashimi shape. The signatures stacked in a sashimi shape in units of a predetermined number of copies are collected into a predetermined number of block-shaped bundles by the second block forming device 51 and carried out by a conveyor.

  By the way, in each of the stack forming devices 48 and 49 of the paper discharge device 18 configured as described above, the leading edge of the succeeding fold is overlapped with the trailing edge of the preceding fold so as to form a sashimi shape. The signature to be conveyed is decelerated and conveyed at a low speed. In this case, since the fold is configured by folding the paper, the end portion is likely to be violated. Therefore, when the signature is decelerated, the signature may be bent up and down or may be displaced in the width direction and be damaged. Also, the signature is continuously conveyed, and at the time of deceleration, the trailing edge of the preceding paper comes into contact with the leading edge of the next conveyed paper, and the edge of the signature is broken and damaged. There is a risk that.

  Therefore, in this embodiment, when the stack forming devices 48 and 49 overlap the leading end of the succeeding signature with the leading end of the succeeding signature, the posture of the signature is stably conveyed. This prevents the paper from being damaged during deceleration or lamination.

  Here, the first and second lamination forming devices 48 and 49 provided in the paper discharge device 18 in the offset rotary printing press of this embodiment will be described in detail. Since the first and second stack forming devices 48 and 49 have substantially the same configuration, only the first stack forming device 48 will be described in detail below.

  In the first stack forming apparatus 48, as shown in FIGS. 1 and 2, the above-described first high-speed conveyance belt 39 is disposed so as to face the upper surface of the horizontal table 61. The transport belt 39 is supported at the front end by a guide pulley 39a and can travel at high speed. The first low-speed upper conveyor belt 44 is supported at its rear end by guide pulleys 44a and 44b that are coaxial with the guide pulley 39a and relatively rotatable, and can run at a low speed. Further, the first low speed lower conveyor belt 45 is disposed such that the rear end portion thereof overlaps with the front end portion of the first high speed upper conveyor belt 39 in a predetermined conveyance area, and a plurality of guide pulleys 45a, 45b,. It can be run at low speed. The first low speed lower conveyance belt 45 is positioned with a predetermined step with respect to the first high speed upper conveyance belt 39. Further, as shown in detail in FIG. 2, each of the conveyor belts 39, 44, and 45 is configured by a plurality of (two in this embodiment) belts having a predetermined width arranged side by side with a predetermined interval in the width direction. Yes.

  A kicker 62 is provided as a sheet push-down mechanism (cam mechanism) that pushes down the rear end portion of the signature S that is nipped and transported between the first high-speed upper transport belt 39 and the table 61. A pair of decelerating rollers 63 and 64 are provided on the upstream side in the conveying direction of the signature S as a speed reduction mechanism that sandwiches and decelerates the rear end side of the signature S.

  That is, the first high-speed upper conveying belt 39 and the first low-speed lower conveying belt 45 (guide pulley 45a) are opposed to each other, and are perpendicular to the conveying direction of the signature S above the first high-speed upper conveying belt 39. A rotary shaft 65 extending along the axis is rotatably supported by a frame (not shown), and the above-described kicker 62 is fixed to the outer peripheral portion of the rotary shaft 65 at predetermined intervals in the axial direction. The kicker 62 functions as a cam roller, and is integrally formed with a protruding portion 62a whose outer peripheral portion protrudes outward. Each kicker 62 is disposed at a position that does not face above each first high-speed upper transport belt 39.

  Therefore, the signature S sandwiched and transported between the table 61 and the first high-speed transport belt 39 is peeled off from the first high-speed transport belt 39 by the rotating kicker 62, and is disposed with a predetermined step. It can be transferred to the lower first low-speed conveyor belt 45.

  Further, at the rear end of the first high-speed upper conveyance belt 39, the first low-speed lower conveyance belt 45 (the guide pulley 45a) is not opposed, and the fold S is conveyed above and below the first high-speed upper conveyance belt 39. A pair of rotary shafts 66 and 67 along a direction orthogonal to the direction are opposed to each other and rotatably supported by the frame. The upper reduction roller 63 is fixed to the outer peripheral portion of the upper rotation shaft 66 at predetermined intervals in the axial direction, and the lower reduction roller 64 described above is fixed to the outer peripheral portion of the lower rotation shaft 67 at predetermined intervals in the axial direction. . In this case, each of the speed reduction rollers 63 and 64 is disposed at a position opposed to the top and bottom, and is disposed at a position not opposed to the top and bottom of each first high-speed upper conveyance belt 39.

  Further, the peripheral speed of the outer peripheral portion of the speed reduction rollers 63 and 64 is lower than the traveling speed of the first high-speed upper conveying belt 39 and higher than the traveling speed of the respective low-speed conveying belts 44 and 45. That is, the conveying speed of the signature S by the decelerating rollers 63 and 64 is lower than the conveying speed of the signature S by the first high-speed upper conveying belt 39 and the conveying speed of the signature S by the low-speed conveying belts 44 and 45. It is set faster. The speed reduction rollers 63 and 64 are provided so as to face each other up and down across the first transport path A, and the lower speed reduction roller 64 has several speed reductions while the outer peripheral surface is substantially circular. The roller 63 has a protruding portion (clamping portion) 63a protruding outward on the outer peripheral surface.

  Therefore, the signature S that is nipped and transported between the table 61 and the first high-speed upper transport belt 39 has a predetermined time due to the protrusion 63a of the upper speed reduction roller 63 and the outer peripheral surface of the lower speed reduction roller 64 whose rear end portion rotates. The conveyance speed of this signature S can be decelerated by being pinched only between. In this case, the pair of decelerating rollers 63 and 64 temporarily decelerates the rear end portion of the signature S that travels at high speed, thereby temporarily pulling the signature S backward to give tension. I try to stabilize my posture. Thereafter, the kicker 62 pushes down the rear end portion of the signature S, which has been released from being held by the speed reduction rollers 63 and 64, downward.

  Note that the rotation shaft 65 and the rotation shaft 66 are connected by a connecting belt 68 so that they can rotate synchronously in the same direction, and the rotation shafts 66 and 67 can also rotate synchronously in the same direction. . Therefore, the kicker 62 and the speed reduction rollers 63 and 64 rotate at the same speed and can act on the signature S running at high speed in synchronization.

  Further, a guide member 69 is provided as a sheet holding mechanism that holds the rear end portion of the signature S pushed down by the kicker 62 and prevents the lift from occurring, and the guide member 69 serves as a guide moving mechanism. The air cylinder 70 can move up and down according to the conveyance speed of the signature S. That is, the guide member 69 has a tip portion that extends upstream in the conveying direction of the signature S and is integrally formed with a protruding portion 69a that is bent in a direction perpendicular to the conveying direction of the signature S. The projecting portion 69a prevents the lifting of the rear end portion of the signature S by locking the width direction end portion of the rear end portion of the signature S, that is, the rear end side portion of the signature S. ing. On the other hand, the piston rod 70a of the air cylinder 70 is connected to the base end of the guide member 69, and the guide member 69 can be moved up and down by the air cylinder 60.

  Accordingly, the signature S that is peeled off from the first high-speed upper conveyance belt 39 by the kicker 62 and pushed downward is delivered to the first low-speed lower conveyance belt 45, and at this time, the rear end side portion of the signature S Is locked to the protruding portion 69a of the guide member 69, so that the rear end portion of the signature S can be prevented from being lifted. In this case, the signature S can be appropriately traveled by moving the guide member 69 up and down by the air cylinder 70 according to the conveying speed of the signature S.

  A guide plate 71 whose front end portion is inclined downward is provided between the rear end portion of the first high speed upper conveying belt 39 and the front end portion of the first low speed lower conveying belt 45. The signature S pushed down can be sent between the first low speed upper conveyor belt 44 and the first low speed lower conveyor belt 45.

In the first stack forming apparatus 48 configured as described above, as shown in FIG. 4, the signature S ₁ guided to the first transport path A by the sorting device 38 is connected to the first high-speed upper transport belt 39 and the first high-speed transport belt 39. It is sandwiched and conveyed by the high-speed lower conveyance belt 40 and is sent to the first low-speed conveyance belts 44 and 45 side.

Then, first, as shown in FIG. 3A, the preceding signature S ₁ reaches the first lamination forming device 48, the front end portion passes through the speed reduction rollers 63 and 64 and the kicker 62, and the rear end portion is The tip is guided by the guide plate 71 while being supported by the first high-speed upper transport belt 39 and the table 61. Next, as shown in FIG. 3-2, the signature S ₁ is fed between the first low-speed upper conveyance belt 44 and the first low-speed lower conveyance belt 45 with the tip portion guided by the guide plate 71. The rear end portion is sandwiched between the pair of speed reduction rollers 63 and 64 so that the speed is reduced by the nip portion.

At this time, the signature S ₁ travels at a high speed on the front end side by the first high-speed upper conveying belt 39, and the rear end is sandwiched between the speed reduction rollers 63 and 64, so that tension is applied to the signature S _1. By doing so, the posture is stabilized, and the rampage of the rear end is suppressed. Thereafter, as shown in Figure 3-3, the can nipped is released by the deceleration rollers 63 and 64, unloading end of kicker 62 is a rear end portion of the folded sheet S ₁ first fast on the conveyor belt 39 and the first low-speed The head is pushed down toward the first low-speed lower conveyor belt 45 by using a head formed between the lower conveyor belt 45 and the lower conveyor belt 45. At this time, as shown in Figure 3-4, since the rear end portion of the folded sheet S ₁ is locked to the guide member 71, rage is suppressed, the contact between the tip of the subsequent folded sheet S ₂ Avoided. Then, as shown in Figure 3-5, in addition to the difference between the conveyor belt 39 and 45 and the difference between the conveying speed of the folded sheet S _1, by the action of the kicker 62 by the rear end portion of the folded sheet S ₁ is pushed down , overlaps above the rear end portion of the folded sheet S ₁ of the preceding tip portion of the subsequent folded sheet S ₂ has fallen to a first low speed under the conveyor belt 45, as shown in Figure 3-6, the sashimi shape In a stacked state, the sheet is sandwiched and conveyed between the first low speed upper conveying belt 44 and the first low speed lower conveying belt 45.

  Thereafter, as shown in FIG. 4, the plurality of units of folds S stacked in a sashimi shape are sandwiched and conveyed between the first low-speed upper conveyance belt 44 and the first low-speed lower conveyance belt 45, and the first block forming device While the sheet is conveyed to 50 and pressed by the paper pressing member to suppress the violence, the leading end is brought into contact with the stopper and the folds S stacked vertically are blocked. And the block signature block is conveyed by a conveyor and carried out to a downstream process.

  On the other hand, the signature S guided to the second transport path B by the sorting device 38 is similar to the signature S guided to the first transport path A described above, and the second high-speed upper transport belt 41 and the second high-speed lower path. It is sandwiched and transported by the transport belt 42 and is stacked in a sashimi shape in the second stack forming device 49, and is stacked in the upper and lower directions in the second block forming device 51 to form a block and go to the downstream process. It is carried out.

  Thus, in the sheet lamination apparatus of Example 1, the high-speed conveyance belts 39, 40, 41, 42, 43 that convey the signature S at a high speed, and the high-speed conveyance belts 39, 40, 41, 42, 43, low-speed conveying belts 44, 45, 46, 47 that are provided on the downstream side in the conveying direction of the signature S and support the signature S on the upper surface and convey at a low speed, and a high-speed upper conveying belt 39, A kicker 62 that pushes down the rear end portion of the signature S conveyed by 41 is provided, and the deceleration is performed by sandwiching the rear end portion side of the signature S upstream of the kicker 62 in the conveying direction of the signature S and decelerating. Rollers 63 and 64 are provided.

  Therefore, with respect to the signature S that is conveyed at a higher speed than the high-speed upper conveyance belts 39 and 41, the decelerating rollers 63 and 64 decelerate the signature S by sandwiching the rear end side of the signature S. The posture can be stabilized, and in this state, the kicker 62 pushes the rear end portion of the signature S downward, transfers the signature S to the low-speed lower conveyor belts 45 and 47, and conveys the signature S at a low speed. Can be properly wrapped, and product quality can be improved.

In the sheet lamination apparatus of Example 1, the speed reduction rollers 63 and 64 are rotated at a lower speed than the conveying speed by the high-speed upper conveying belts 39 and 41 and at a higher speed than the conveying speed by the low-speed lower conveying belts 45 and 47. Thus, a protruding portion 63a is provided on the outer peripheral surface of the upper speed reduction roller 63 so as to sandwich the signature S for a predetermined time. Therefore,
With respect to the signature S conveyed by the high-speed upper conveyor belts 39 and 41, the pair of speed reduction rollers 63 and 64 rotating at a predetermined speed sandwich and decelerate for a predetermined time. It is possible to appropriately decelerate without substantially affecting the transport posture.

  Further, in the sheet stacking and forming apparatus according to the first embodiment, the kicker 62 pushes down the rear end portion of the signature S that has been released from being held by the speed reduction rollers 63 and 64 downward. Accordingly, the signature S is released from the speed reduction rollers 63 and 64 after being decelerated, and the rear end portion thereof is pushed downward by the kicker 62, so that the signature S is appropriately conveyed at the high speed upper conveying belts 39 and 41. Can be separated from

  Further, in the sheet stacking and forming apparatus according to the first embodiment, the guide member 69 that holds the rear end portion of the signature S pushed down by the kicker 62 and prevents the lift is provided. Therefore, after the signature S is pushed down below the kicker 62, the rear end portion of the signature S is held by the guide member 69, and the floating is prevented, so that the signature S can be stably conveyed. Therefore, contact with the signature S to be conveyed next can be avoided, and damage to the signature S can be prevented. In this case, since the guide member 69 locks the end portion in the width direction at the rear end portion of the signature S, the lateral fluctuation of the signature S is suppressed, and the guide member 69 is brought into contact with the signature S to be conveyed next. Can be prevented appropriately.

  Further, in the sheet stacking and forming apparatus according to the first embodiment, an air cylinder 70 that can move the guide member 69 up and down according to the conveyance speed of the signature S is provided. Therefore, immediately after the rotary printing press is started, the conveyance speed of the web W and signature S is low, and in this case, the guide is provided by the air cylinder 70 so as not to adversely affect the signature S to which the guide member 69 is conveyed. The member 69 is moved downward, and the guide member 69 is moved up and down according to the conveyance speed of the signature S by the air cylinder 70, so that the rear end of the signature S is appropriately suppressed. can do.

  Further, in the offset rotary printing press according to the first embodiment, the sheet feeding device 11, the infeed device 12, the printing device 13, the drying device 14, the cooling device 15, the web pass device 16, the folding device 17, and the paper discharge device 18 are used. The stacking devices 48 and 49 are provided in the paper discharge device 18, and the stacking devices 48 and 49 are provided with the high-speed transport belts 39, 40, 41, 42 and 43 and the low-speed transport belts 44, 45, 46 and 47. A kicker 62 that pushes the rear end of the signature S conveyed by the high-speed upper conveyor belts 39 and 41 downward, and a rear side of the signature S that is provided upstream of the kicker 62 in the conveyance direction of the signature S. It is composed of decelerating rollers 63 and 64 that pinch the end side and decelerate.

  Therefore, the decelerating rollers 63 and 64 decelerate the fold S that is conveyed at a higher speed than the high-speed upper conveying belts 39 and 41 by the paper discharge device 18 by sandwiching the rear end side of the fold S. Thus, the posture of the signature S can be stabilized, and in this state, the kicker 62 pushes down the rear end of the signature S downward, and the signature S is transferred to the low speed lower conveyor belts 45 and 47 and conveyed at a low speed. And the signature S can be wrapped appropriately, and the product quality can be improved.

  Further, in the offset rotary printing press according to the first embodiment, the stack forming devices 48 and 49 are configured by using high-speed conveyance belts 39, 40, 41, 42, and 43, low-speed conveyance belts 44, 45, 46, and 47, and high-speed A kicker 62 that pushes the rear end portion of the signature S conveyed by the conveyor belts 39 and 41 downward, and a guide member that holds the rear end portion of the signature S pushed downward from the kicker 62 and prevents the lift. 69. Therefore, the kicker 62 pushes down the rear end portion of the signature S downward with respect to the signature S that is conveyed at a higher speed than the high-speed upper conveyance belts 39 and 41 in the paper discharge device 18, and the signature S is raised at a high speed. When separated from the transport belts 39 and 41, the guide member 69 holds the rear end portion of the signature S to prevent the lift, so that the signature S is transported stably and then transported. Contact with the signature S can be prevented, and the signature S can be transferred to the low speed conveying belts 45 and 47 and conveyed at a low speed, so that the signature S can be appropriately wrapped and the product quality can be improved.

  FIG. 6 is a schematic front view illustrating a sheet stacking apparatus according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as what was demonstrated in the Example mentioned above, and the overlapping description is abbreviate | omitted.

  In the sheet stacking apparatus 80 of the second embodiment, as shown in FIG. 6, the first sheet pushes down the rear end portion of the signature S that is nipped and conveyed by the first high-speed upper conveying belt 39 and the table 61. A first kicker 62 as a push-down mechanism and a second kicker 81 as a second sheet push-down mechanism are provided, and the rear end side of the signature S is disposed upstream of the first kicker 62 in the conveying direction of the signature S. A pair of speed reduction rollers 63 and 64 is provided as a speed reduction mechanism that pinches and decelerates.

  That is, the first rotation along the direction in which the first high-speed upper conveyance belt 39 and the first low-speed lower conveyance belt 45 face each other and is perpendicular to the conveyance direction of the signature S above the first high-speed upper conveyance belt 39. The shaft 65 and the second rotating shaft 82 are rotatably supported by the frame, and the first kicker 62 is fixed to the outer peripheral portion of the first rotating shaft 65 at predetermined intervals in the axial direction. Second kickers 81 are fixed at predetermined intervals in the axial direction. The kickers 62 and 81 function as cam rollers, and projecting portions 62a and 81a whose outer peripheral portions project outward are integrally formed. The kickers 62 and 81 are disposed at positions that do not face the upper portions of the first high-speed upper conveying belts 39.

  Accordingly, the signature S that is nipped and conveyed by the table 61 and the first high-speed conveyance belt 39 is first peeled off from the first high-speed conveyance belt 39 by the rotating second kicker 81, and then rotated. The first kicker 62 is peeled off from the first high-speed upper conveyance belt 39 and can be transferred to the lower first low-speed conveyance belt 45 disposed with a predetermined level difference.

  Note that the configuration of the speed reduction rollers 63 and 64, the guide member 69, and the like are the same as those in the first embodiment described above, and a description thereof will be omitted.

In the first laminate forming apparatus 80 configured as described above, the leading signature S ₁ has a leading end that passes through the speed reduction rollers 63 and 64 and the kickers 62 and 81, and a trailing end that is a first high-speed upper conveying belt. The tip is guided by the guide plate 71 in a state supported by 39 and the table 61. Then, the folded sheet S ₁ is in the rear end portion is held by a pair of reduction rollers 63 and 64, it is decelerated by the nip portion. At this time, the signature S ₁ travels at a high speed on the leading end side by the first high-speed upper conveying belt 39, and the rear end is sandwiched between the speed reduction rollers 63 and 64, so that tension is applied to the signature S _1. As a result, the posture is stabilized and the rampage of the rear end is suppressed.

Then, from the clamping is released by the reduction rollers 63 and 64, first, the out end and the first slow under the conveyor belt 45 of the second kicker 81 the rear end portion of the folded sheet S ₁ first fast on the conveyor belt 39 The head is pushed down toward the first low-speed lower conveyor belt 45 using the head formed between the two. Next, the first kicker 62 pushes down the rear end portion of the signature S ₁ toward the first low-speed lower conveyor belt 45 and drops it. At this time, the rear end portion of the folded sheet S ₁ is locked to the guide member 71, rage is suppressed, the contact between the tip portion of the succeeding folded sheet S ₂ is avoided. Then, by the action of each kicker 81, 62, the trailing end of the signature S ₁ is pushed down, so that the leading signature S ₁ in which the leading end of the succeeding signature S ₂ falls on the first low-speed lower conveying belt 45. In a state where it overlaps above the rear end portion and is laminated in a sashimi shape, it is sandwiched and transported between the first low speed upper transport belt 44 and the first low speed lower transport belt 45.

  As described above, in the sheet stacking and forming apparatus according to the second embodiment, the first kicker 62 and the second kicker 81 that push down the rear end portion of the signature S conveyed by the high-speed upper conveying belts 39 and 41 are provided. Along with these kickers 62 and 81, speed reduction rollers 63 and 64 are provided on the upstream side in the conveying direction of the signature S to decelerate the rear end portion of the signature S.

  Therefore, with respect to the signature S that is conveyed at a higher speed than the high-speed upper conveyance belts 39 and 41, the decelerating rollers 63 and 64 decelerate the signature S by sandwiching the rear end side of the signature S. The posture can be stabilized, and in this state, the first and second kickers 62 and 81 push down the rear end portion of the signature S downward, and the signature S is transferred to the low-speed lower conveying belts 45 and 47 so that the low speed is reached. And the signature S can be appropriately wrapped, and the product quality can be improved.

  In the sheet stacking apparatus of Example 2, the first kicker 62 and the second kicker 81 arranged from the upstream side to the downstream side in the conveyance direction of the signature S are provided. Therefore, the signature S is continuously pushed down by the two kickers 62 and 81, and the signature S is stably held for a long period of time. It can be transferred at low speed.

  Further, in the stack forming apparatus of the second embodiment, the first and second kickers 62 and 81 are provided with the first protrusion 62a and the second protrusion 81a that push down the rear end of the signature S on the outer peripheral portion of the first and second kickers 62 and 81. After the second protrusion 81a pushes down the rear end of the signature S with respect to the signature S conveyed by the upper conveyor belt 39, the first protrusion 62a pushes down the rear end of the signature S. I am doing so. Therefore, after the rear end portion of the signature S is pushed down by the second projecting portion 81a, the rear end portion is pushed down by the first projecting portion 62a, and the signature S is stabilized over a long period of time. Can be transferred to the first low-speed lower transfer belt 45 appropriately.

  In each of the above-described embodiments, the present invention relates to a sashimi-like stacking apparatus in which the leading edge of the succeeding signature is overlapped with the trailing edge of the preceding signature, and the above-described sheet feeding device 11 and infeed device are related to each other. 12, the printing device 13, the drying device 14, the cooling device 15, the web pass device 16, and the folding device 17. The distribution device 38 may be omitted even in the paper discharge device 18. Further, the sheet to be handled is not limited to eclectic but may be a single sheet of paper.

  The sheet stacking apparatus and rotary printing press according to the present invention are intended to improve product quality by stably transporting a sheet, and can be applied to any rotary printing press.

It is a schematic front view showing the lamination | stacking formation apparatus of the sheet | seat which concerns on Example 1 of this invention. 1 is a schematic plan view illustrating a sheet stacking apparatus of Example 1. FIG. FIG. 3 is a schematic diagram illustrating the operation of the sheet stacking apparatus of Example 1. FIG. 3 is a schematic diagram illustrating the operation of the sheet stacking apparatus of Example 1. FIG. 3 is a schematic diagram illustrating the operation of the sheet stacking apparatus of Example 1. FIG. 3 is a schematic diagram illustrating the operation of the sheet stacking apparatus of Example 1. FIG. 3 is a schematic diagram illustrating the operation of the sheet stacking apparatus of Example 1. FIG. 3 is a schematic diagram illustrating the operation of the sheet stacking apparatus of Example 1. 1 is a schematic view of a folding apparatus to which a sheet stacking apparatus of Example 1 is applied. FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram illustrating an offset rotary printing press to which a sheet lamination apparatus of Example 1 is applied. It is a schematic front view showing the lamination | stacking formation apparatus of the sheet | seat which concerns on Example 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Paper feeder 12 Infeed apparatus 13 Printing apparatus 14 Drying apparatus 15 Cooling apparatus 16 Web pass apparatus 17 Folding apparatus 18 Paper discharge apparatus 39 1st high speed upper conveyance belt 40 1st high speed lower conveyance belt 41 2nd high speed upper conveyance belt 42 Second low speed lower conveyor belt 44 First low speed upper conveyor belt 45 First low speed lower conveyor belt 46 Second low speed upper conveyor belt 47 Second low speed lower conveyor belt 48, 80 First stack forming device 49 Second stack forming device 61 Table 62 Kicker, first kicker (sheet pressing mechanism, first sheet pressing mechanism)
63 Upper deceleration roller (deceleration mechanism)
64 Lower speed reduction roller (Deceleration mechanism)
69 Guide member (sheet holding mechanism)
69a Protruding part (clamping part)
70 Air cylinder (guide movement mechanism)
81 Second kicker (second sheet pressing mechanism)
W Web (sheet)
S, S ₁ , S ₂ , S ₃ signature (sheet)

Claims (13)

In a sheet stacking apparatus for wrapping at least a part of continuously conveyed sheets,
A high-speed conveyor belt that conveys the sheet at high speed;
A low-speed conveyance belt that is provided downstream of the high-speed conveyance belt in the sheet conveyance direction and supports the sheet on the upper surface portion and conveys the sheet at a low speed;
A sheet push-down mechanism that pushes down a rear end portion of the sheet conveyed by the high-speed conveyance belt;
A speed reduction mechanism provided on the upstream side in the sheet conveying direction from the sheet push-down mechanism and decelerating by sandwiching the rear end side of the sheet;
An apparatus for stacking and forming sheets, comprising:   The speed reduction mechanism includes a pair of speed reduction rollers provided opposite to each other across the sheet conveyance path by rotating at a lower speed than the sheet conveyance speed by the high-speed conveyance belt and at a higher speed than the sheet conveyance speed by the low-speed conveyance belt. 2. The sheet lamination forming apparatus according to claim 1, further comprising a clamping unit that clamps the sheet for a predetermined time on an outer peripheral surface of at least one side of the pair of reduction rollers.   3. The sheet stacking and forming apparatus according to claim 2, wherein the sheet push-down mechanism pushes down a rear end portion of the sheet released from being pinched by the pair of speed reduction rollers.   The sheet stacking method according to any one of claims 1 to 3, further comprising a sheet holding mechanism that holds a rear end portion of the sheet pressed downward by the sheet pressing mechanism and prevents the sheet from rising. apparatus.   4. The sheet stacking and forming apparatus according to claim 2, wherein the sheet holding mechanism includes a guide member that locks a width direction end portion at a rear end portion of the sheet.   The sheet stacking apparatus according to claim 5, wherein the sheet holding mechanism includes a guide moving mechanism capable of moving the guide member up and down according to a sheet conveyance speed.   5. The sheet pressing mechanism according to claim 1, wherein the sheet pressing mechanism includes a first sheet pressing mechanism and a second sheet pressing mechanism provided side by side from the upstream side to the downstream side in the sheet conveying direction. Sheet forming apparatus.   The first sheet pressing mechanism and the second sheet pressing mechanism have a first cam roller and a second cam roller that rotate in synchronization with the conveyance of the sheet, and a sheet is placed on the outer periphery of the first cam roller and the second cam roller. A first protrusion and a second protrusion are provided to push down the rear end, and the second protrusion pushes down the rear end of the sheet downward with respect to the sheet conveyed by the high-speed conveyance belt. The sheet stacking and forming apparatus according to claim 7, wherein the first protrusion pushes down a rear end portion of the sheet. In a sheet stacking apparatus for wrapping at least a part of continuously conveyed sheets,
A high-speed conveyor belt that conveys the sheet at high speed;
A low-speed conveyance belt that is provided downstream of the high-speed conveyance belt in the sheet conveyance direction and supports the sheet on the upper surface portion and conveys the sheet at a low speed;
A sheet push-down mechanism that pushes down a rear end portion of the sheet conveyed by the high-speed conveyance belt;
A sheet holding mechanism that holds the rear end portion of the sheet pushed downward from the sheet pushing mechanism and prevents the sheet from lifting up;
An apparatus for stacking and forming sheets, comprising:   4. The sheet stacking and forming apparatus according to claim 2, wherein the sheet holding mechanism includes a guide member that locks a width direction end portion at a rear end portion of the sheet.   The sheet stacking apparatus according to claim 5, wherein the sheet holding mechanism includes a guide moving mechanism capable of moving the guide member up and down according to a sheet conveyance speed. A paper feeding device for supplying a web;
A printing device that performs printing on the web supplied from the paper feeding device;
A drying device that dries the ink of the web printed by the printing device;
A folding device for cutting a web dried by the drying device to form a predetermined fold;
In a rotary printing press comprising a paper discharge device for stacking and discharging signatures formed by the folding device,
The paper discharge apparatus has a stacking apparatus that wraps a part of signatures that are continuously conveyed,
The stack forming apparatus comprises:
A high-speed conveyor belt that conveys the sheet at high speed;
A low-speed conveyance belt that is provided downstream of the high-speed conveyance belt in the sheet conveyance direction and supports the sheet on the upper surface portion and conveys the sheet at a low speed;
A sheet push-down mechanism that pushes down a rear end portion of the sheet conveyed by the high-speed conveyance belt;
A speed reduction mechanism provided on the upstream side in the sheet conveying direction from the sheet push-down mechanism and decelerating by sandwiching the rear end side of the sheet;
A rotary printing press characterized by comprising: A paper feeding device for supplying a web;
A printing device that performs printing on the web supplied from the paper feeding device;
A drying device that dries the ink of the web printed by the printing device;
A folding device for cutting a web dried by the drying device to form a predetermined fold;
In a printing machine comprising a paper discharge device that stacks and discharges the signatures formed by the folding device,
The paper discharge apparatus has a stacking apparatus that wraps a part of signatures that are continuously conveyed,
The stack forming apparatus comprises:
A high-speed conveyor belt that conveys the sheet at high speed;
A low-speed conveyance belt that is provided downstream of the high-speed conveyance belt in the sheet conveyance direction and supports the sheet on the upper surface portion and conveys the sheet at a low speed;
A sheet push-down mechanism that pushes down a rear end portion of the sheet conveyed by the high-speed conveyance belt;
A sheet holding mechanism that holds the rear end portion of the sheet pushed downward from the sheet pushing mechanism and prevents the sheet from lifting up;
A rotary printing press characterized by comprising:

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