JP2552490B2 - Single sheet overlap device - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention, while feeding a single sheet along the feeding path,
The present invention relates to a sheet-fed sheet overlapping device in which a trailing edge of a preceding sheet is overlapped with a leading edge of a subsequent sheet.

[Prior art]

In a continuous cutting and stacking device for stacking and stacking a predetermined number of sheet-by-sheet sheets such as Japanese paper continuously cut to a predetermined dimension, as a pretreatment when stacking the sheet-by-sheet in the stacking section,
A method is considered in which the front end portion and the rear end portion of each of the continuously fed sheet are sequentially overlapped with each other, and then the sheet is stacked vertically in a stacking section. As a sheet overlapping apparatus used in this type of continuous cutting and accumulating apparatus, there is a conventional one disclosed in JP-A-55-7176. In this overlap device, a lifting means for lifting the rear end portion of the sheet received by the receiving-side feeding means is disposed between the feeding-side feeding means on the feeding path and the receiving-side feeding means on the lower side thereof. Then, while the trailing edge of the preceding sheet is lifted by the lifting means, the feeding-side feeding means feeds the succeeding sheet-by-sheet at a speed faster than the receiving-side feeding means, and the feeding speed difference between both feeding means is increased. By
The leading end of the subsequent sheet is inserted below the trailing end of the preceding sheet.

[Problems to be Solved by the Invention]

In the conventional overlap device, a lifting device is arranged between the feeding-side feeding means and the receiving-side feeding means, but basically, the feeding speed difference between the feeding means is used to sequentially overlap the sheet sheets. The overlap amount is determined by the feed speed difference and the size of the moving distance at that time. Therefore, in order to obtain a sufficient amount of overlap between the individual sheets and ensure the overlap, it is necessary to increase the feed speed difference between the two feeding means or increase the moving distance. However, conventionally, the feeding speeds of the respective feeding means are always constant. Therefore, if the feeding speed difference is made large, when the sheet is spread over the both feeding means, the feeding speed difference causes the both feeding means. The sheet will be corrugated in the thickness direction between the sheets, and the sheet will be scratched due to friction with the lifting means, or if the sheet is thin, the sheet will interfere due to the lifting means. There is a problem such as breaking itself. Further, when the webs are continuously cut and accumulated, since the plurality of webs are cut in an overlapping state, the plurality of sheet-like sheets are in an overlapped state. If the feeding speed of the feeding side feeding means is made abnormally high without lowering the feeding speed of the receiving side feeding means, during feeding of the sheet by the feeding side feeding means side, the plurality of sheet-fed sheets are mutually exchanged. There is a gap between them, which becomes a problem at the time of integration in the subsequent stage. On the other hand, if the feed speed difference between the two feeding means is made small and the moving distance from the overlap start to the overlap completion is made large, the feed path becomes very long, and it goes without saying that the entire apparatus becomes long. Since the distance between the two feeding means becomes large, it is very difficult to surely overlap the front and rear sheets individually in the case of a thin sheet having weak stiffness like paper. . In view of the conventional problems, the present invention is a sheet-fed sheet overlapping device capable of reliably and promptly overlapping front and back sheet-fed sheets within a short distance without increasing the difference in feeding speed during normal feeding. Is provided.

[Means for Solving the Problems]

According to the present invention, the sheet A fed from the feeding side feeding means B is received on the lower side of the feeding side feeding means B in the feeding path of the sheet feeding sheet A and is fed at a lower speed than the feeding side feeding means B. Receiving side feeding means C is arranged, and feeding side feeding means B
When the subsequent sheet A is supplied to the receiving side feeding means C from the following sheet A by the feeding side feeding means B
Of the leading sheet A by the receiving side feeding means C and the feeding speed difference between the feeding speed of the preceding sheet A of the receiving side feeding means C and the leading end portion of the succeeding sheet of sheets A on the feeding side feeding means B side of the receiving side feeding means C side. In a sheet-fed overlapping device in which the trailing edge of the preceding sheet A is overlapped, the leading end of the subsequent sheet A on the supply side feeding means B side is received on the receiving side feeding means C side. When the sheet A of the preceding sheet is overlapped with the trailing end of the sheet A, the feeding means B, C
The feed speed difference between the front and rear individual sheets A becomes large, and after the front and rear both sheet A overlap each other, the feed speed difference between the front and rear individual sheets A due to the both feeding means B and C increases. Acceleration / deceleration driving means E for accelerating and decelerating one of the feeding means B is provided so as to be small.

【Example】

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an overall layout view of a continuous cutting and accumulating device equipped with an overlap device according to the present invention. Mainly, a shaft attachment portion 1 of a winding base paper A and a base paper A fed from the shaft attachment portion 1 are shown.
Detection unit 2 for detecting the tension of the base paper, a vertical cutting unit 3 for slitting the base paper A in the vertical direction, a horizontal cutting unit 4 for cutting the slit web in the horizontal direction, and a sheet after cutting is sequentially overlapped. It is configured by an overlapping section 5, a stacking section 6 for stacking and stacking the sheet from below, and the like. A plurality of winding base papers A are rotatably attached to the shaft attachment portion 1 by a support shaft (not shown). A brake for braking is provided side by side with each support shaft, the tension of the unrolled base paper A is detected by the detection roll of the tension detector 2, and the brake is controlled by a control device (not shown).
Each base paper A is rewound and fed out in a predetermined tension state. The longitudinal cutting unit 3 is a base paper A fed from the shaft-attaching unit 1.
Is cut in the vertical direction so as to form a plurality of strips (hereinafter referred to as web A), and is provided with a plurality of slitter knives arranged at predetermined intervals in the horizontal direction.
Each slitter knife rotates at a speed higher than the moving speed of the web A. The lateral cutting portion 4 is for laterally cutting the moving web A into a predetermined length, and as shown in FIG. 2, a rotary cutter 7 constitutes a main portion thereof. Draw roll 8 and nip roll 9 on the good side
However, the first conveyors 10 are respectively arranged on the lower side. The draw roll 8 is arranged laterally so as to pull out a plurality of webs A and convey and feed the web A to the rotary cutter 7, and is driven to rotate about an axis by a drive unit (not shown). A nip roll 9 is rotatably arranged on the upper side of the draw roll 8 so as to firmly sandwich the web A with the draw roll 8. The nip roll 9 has a rubber-wrapped surface,
In order to prevent the web A from wrinkling, a plurality of spirally wound grooves 11 are formed on the outer peripheral surface with the center in the axial direction as the center. A pair of upper and lower feed rolls 12 are provided between the horizontal cutting section 4 and the draw roll 8. The feed roll 12 is configured to lightly clamp the web A from above and below and to convey and supply the web A to the rotary cutter 7 at a speed faster than that of the draw roll 8. As shown in FIG. 2, the rotary cutter 7 includes a top knife 13 that serves as a rotary blade and a bottom knife that serves as a fixed blade.
It is composed of 14 and. The top knife 13 is a top knife body that is rotatably supported around the horizontal axis.
It is equipped with an adjustable knife spacing. Protruding rough surfaces 16 are formed on the outer peripheral surface of the top knife body 15 at appropriate intervals, so that when the top knife body 15 rotates at a high speed, the surface side thereof does not become a negative pressure state due to centrifugal force. The bottom knife 14 is attached to the upper end of a bottom knife body 20 arranged below the top knife body 15, and is configured so that the distance between the bottom knife 14 and the top knife 13 can be adjusted. A web passing table 19 is provided on the upper surface of the bottom knife body 20 so as to form a web passage with the top knife body 15. The web passing table 19 is formed by recessing the upper surface in an arc shape from the tip side of the bottom knife 14 toward the receiving port 22 side of the first conveyor 10, and at the end side of the web passing table 19, the first conveyor 10 is provided. A plurality of air nozzles 23 are provided in the lateral direction so as to open toward the transfer port 22 of. The air nozzle 23 ejects air toward the transfer port 22 side of the first conveyor 10 to bring the upper surface side of the web passing table 19 into a negative pressure state, and the front end side of the web A conveyed to the first conveyor 10 side is web-shaped. The transfer table 19 is guided along the upper surface thereof to the transfer port 22 side of the first conveyor 10. Further, the air pressure ejected from the air nozzle 23 is appropriately adjusted in accordance with the rotation speed of the first conveyor 10 by an air valve 25 provided in a pipe 24 communicating with the air nozzle 23. The first conveyor 10 is composed of a belt conveyor having a pair of upper and lower belts 26 for nipping and transporting the web A in a sliding state, and each belt 26 with respect to the web A between the draw roll 8 and the nip roll 9. The draw roll 8 is rotated in the transport direction at a speed higher than the peripheral speed of the draw roll 8 so as to appropriately apply a tensile force. When the web A is cut by the top knife 13 and the bottom knife 14 in the middle of the first conveyor 10, the web A is cut almost at the same time.
A pair of upper and lower pulling rolls 27 are provided so as to more strongly pull the moving web A in a tensioned state by sandwiching. Each of the pulling rolls 27 has the first end of the web A at the time of cutting.
The belt 26 of the conveyor 10 is sandwiched via the feeding portion side of the belt 26, and is arranged on the lower side from the lateral cutting portion 4 by the cutting length of the web A. In addition, each tension roll 27
Is configured to be freely movable in the moving direction of the web A in accordance with the cutting length of the web A by rotating a handle provided on the shaft end of the moving gear that engages on the fixed rack gear. . The web A (hereinafter referred to as a sheet A) which has been cut into a sheet shape by being cut to a predetermined cutting length by the lateral cutting section 4 is
It is nipped by a pair of upper and lower belts 26 of the conveyor 10, and is conveyed to the pinch roll 28 side while keeping an appropriate space between it and the subsequent sheet A. The pinch roll 28 is movably arranged at an appropriate position, and the single sheet A is firmly sandwiched via the feeding portion side of the belt 26 of the first conveyor 10, and the single sheet A is conveyed to the first conveyor 10 by the pinch roll 28. A pair of upper and lower parts are provided so as to be conveyed and supplied to the overlapping part 5 at the feeding speed of. As shown in FIG. 3, the overlapping section 5 includes a pair of upper and lower kicker rolls 29 that form a feeding side feeding means B together with the first conveyor 10 and a pair of upper and lower second conveyors 30 that form a receiving side feeding means C. And an upper overlap roll 31 and a lower overlap roll which are arranged between the first and second conveyors 10 and 30 and constitute lifting means D.
It consists of 32 and. The pair of upper and lower kicker rolls 29 are the first when rotating normally.
It rotates at about the same speed as the conveyor 10 or at a preferable speed, but speeds up faster than the first conveyor 10 in place, and speeds up and slows down in order to reduce speed in the space between the individual sheets A. It is adapted to be driven via means E. In the acceleration / deceleration driving means E, as shown in FIGS. 4 and 5, an input shaft 34 having an input gear 33 is composed of a revolution differential gear 35, an arm rod 36, a cam follower 37, a cam body 38 and the like. There is. The input shaft 34 is rotatably supported by a fixed frame via bearings, and the power output from a timing adjustment differential (not shown) is input via an idler. The kicker roll 29 is rotated once. The input shaft 34 rotates in the direction of the arrow in FIG.
A revolution differential gear 35 meshes with the input gear 33. The revolution differential gear 35 is rotatably attached to a bracket 39 fixed to the lower kicker roll 29 at a proper position via a pin 40a. The revolution differential gear 35 is integrally formed on one end of the arm rod 36, and a cam follower is formed on the other end of the arm rod 36.
37 is pivoted. The cam body 38 includes an arcuate cam surface 40 formed concentrically with the input shaft 34 and a linear cam surface 41 formed in a straight line on the inner circumference, and is fixed to a fixed frame. Each cam surface 40, 41 of the cam body 38 is a cam follower 3 of the arm rod 36.
The cam follower 37 guides the 7 and the arc cam surface 40
When the cam follower 37 is on the straight cam surface 41, the kicker roll 29 is rotated at a normal constant speed when
As shown in FIG. 6, the arm rod 36 is rotated around the pin 40a in the direction of the arrow on the front half side thereof to rotate the kicker roll 29 at an increased speed, and on the latter half side thereof is decelerated to the normal rotation. Note that FIG. 6 shows a state in which the kicker roll 29 speeds up and the overlap of the sheet A is completed, and the kicker roll 29 is in the interval between the sheet A and the succeeding sheet A. The lower kicker roll 29 is arranged on the axis of the input shaft 34, one end of which is rotatably supported by a needle bearing inserted in the inner diameter hole of the input gear 33, and the other end of which is rotatably supported by a ball bearing. Has been done. The upper kicker roll 29 is rotatably supported by bearings at both ends, and is configured to rotate synchronously with the lower kicker roll 29 via a gear (not shown). The second conveyor 30 comprises a belt conveyor 42, which is configured to rotate at a slower speed than the belt of the first conveyor 10. Also the second
The conveyor 30 is provided with a catch roll 43 so as to firmly sandwich the sheet A through the belt feeding portion side. The upper overlap roll 31 has arcuate recesses 46 formed at appropriate positions on the circumferential surface, and the lower overlap roll 32
A plurality of claws 47 are provided on the upper part of the upper overlap roll 31 and the lower overlap roll 32,
The concave portion 46 and the claw 47 are configured to rotate in the transport direction in synchronization with each other so as to coincide with each other during rotation. The upper and lower overlap rolls 31 and 32 are configured to rotate once each time the rotary cutter 7 makes one rotation, and the driving unit thereof feeds the sheet A that also moves during driving. On the other hand, a differential for timing adjustment for matching the concave portion 46 and the claw 47 is incorporated. In the overlapping section 5, the preceding sheet A
When the leading end of the sheet passes between the upper overlap roll 31 and the lower overlap roll 32, the first conveyor 10
It enters between the belts of the second conveyor 30 rotating at a slower speed. When the leading edge of the preceding sheet A is firmly sandwiched by the pair of upper and lower catch rolls 43, the trailing edge of the sheet A is lifted by the claw 47 of the lower overlap roll 32. At this time, the cam follower 37 of the acceleration / deceleration driving means E is guided by the left half side of the linear cam surface 41 to the left and right center sides thereof, so that the kicker roll 29 is rotated at an increased speed. And
The subsequent sheet A sandwiched between the kicker rolls 29 is rapidly fed at a speed higher than the normal feeding speed by the increased speed rotation of the kicker rolls 29, and as shown in FIG. The sheet A is inserted below the rear end of the sheet A. Therefore, since the lifting operation of the lower overlap roll 32 by the claw 46 and the feeding operation by the acceleration of the kicker roll 29 are performed in synchronization, the feeding speed of the front and rear sheet A becomes relatively high. , Preceding sheet A
The leading end of the succeeding sheet A can be quickly inserted into the lower side of the rear end without interfering with each other, and the individual sheets A can be sequentially and reliably overlapped. Sheet A with the leading edge of the subsequent sheet A preceding
When it overlaps with the rear end of the rear, the cam follower 37 is located at the left and right center of the straight cam surface 41, and the kicker roll 37
29 is located in the space between the front and rear single-wafer sheets A. Then, after that, when the cam follower 37 is guided to the right by the right half side of the linear cam surface 41, the kicker roll 29 is decelerated to the normal rotation. Therefore, the front and rear single-wafer sheets A overlap the first conveyor 10 and the second conveyor 10 in the overlapping state.
It is sent by the feeding action with the conveyor 30. At this time, the trailing edge of the subsequent sheet A is the first conveyor.
If the leading edge of the succeeding sheet A reaches the second conveyor 30 before being separated from the sheet 10, the succeeding sheet A is subjected to the feeding action of both the first conveyor 10 and the second conveyor 30. However, since the difference in feed speed between the first conveyor 10 and the second conveyor 30 after the overlap can be reduced, the corrugation and wrinkles of the subsequent sheet A between the first conveyor 10 and the second conveyor 30 can be reduced. Etc. can be prevented, and the sheet A can be smoothly and reliably fed from the first conveyor 10 to the second conveyor 30. The pinch roll 28, the kicker roll 29, and the catch roll 43 are configured to move in the feeding direction by turning a gear that meshes with a fixed rack gear with a handle, and if the length of the sheet A differs, Each roll position can be adjusted accordingly. As shown in FIGS. 7 and 8, the stacking unit 6 includes a pair of upper and lower timing rolls 45 provided on the rear end side of the second conveyor 30, and a stacking conveyor provided on the lower side of the second conveyor 30. 46 and a carry-out conveyor 47, a plurality of stoppers 48 that intermittently rotate and rotate, and an air nozzle 49. The timing roll 45 is normally configured to rotate in the transport direction at the speed of the second conveyor 30 or at a slightly slower preferred speed to feed the overlapped sheet A onto the stack conveyor 46. When the number of the sheet A on the sheet 46 reaches the set number, the speed is increased to release the overlap of the sheet A, and the sheet is decelerated to be appropriately placed between the preceding sheet A and the succeeding sheet A. It is configured to create the spacing. Each stopper 48 is mounted so as to move in parallel by two sets of chain rows 52 and 53 wound around four sprockets 50 and 51, respectively. The stopper 48 is configured to rotate synchronously with the rotary cutter 7 via an index (not shown), and when the number of sheets A set reaches the set number, the timing rolls 45 are operated almost at the same time. It is configured to carry out F. When stacking the single sheets A in the stacking unit 6, as shown in FIG. 7, the stopper 48 is stopped at the stacking position b at the end of the stacking conveyor 38 so as to project upward. Then, the leading edge of the sheet A that has moved to the stacking position b by the rotation of the stacking conveyor 46 contacts the stopper 48 and stops on the stacking conveyor 46. Then, the succeeding sheet A is also sequentially supplied onto the stacking conveyor 46, but since each sheet A is in an overlapped state, it is stacked while being sequentially inserted under the preceding sheet A. . When the number of the single sheets A on the stacking conveyor 46 reaches the set number, as shown in FIG. 8, the timing roll 45 decelerates and the interval between the preceding single sheet A and the succeeding single sheet A is increased. Give rise to. Similarly, the stopper 48 moves to the carry-out conveyor 47 side, and the next stopper 48 is the accumulation conveyor.
While projecting upward, it moves to the stacking position b and stops.
Therefore, the stack paper F can be carried out from the stack conveyor 46 to the carry-out conveyor 47, and the subsequent sheet A can be stacked by the next stopper 48. Further, during the stacking at the stacking position b, air is jetted from the air nozzle 49 to the upper surface of the subsequent sheet A. As a result, the rear end side of the stacking sheet F in the stacking state floats up, so that the frictional resistance when inserting the subsequent sheet A can be reduced, and the edges of each sheet A can be aligned and stacked in order. it can. FIG. 9 shows a second embodiment of the overlapping section 5, a first example.
The conveyor 10 is driven via the acceleration / deceleration driving means E, and when the rotary cutter 7 makes one revolution, the conveyor 10 is driven by the acceleration / deceleration driving means E in synchronization with the acceleration / deceleration. Then, when the projecting piece 32a of the overlap roll 32 lifts the trailing end of the preceding sheet A, the first conveyor 10 is accelerated and the leading end of the succeeding sheet A precedes the preceding sheet. It is configured to be inserted into the lower surface of the rear end portion of A. The overlap roll 32 having the projecting piece 32a is provided on the inlet side of the second conveyor 30, and receives the power from the first conveyor so that if the rotary cutter 7 makes one rotation, the overlap roll 32 also makes one rotation. It is configured. FIG. 10 shows a third embodiment of the overlap portion 5, in which an overlap roll 55 having a plurality of convex portions 54 on its peripheral surface is arranged at an intermediate position between the first conveyor 10 and the second conveyor 30. , By the rotation of this overlap roll 55,
To lift the trailing end of the preceding sheet A by one convex portion 54, insert the leading end of the following sheet A into the lower surface of the trailing end of the preceding sheet A so that they overlap. I am configuring. At this time, since the leading end of the preceding sheet A is pushed downward from the other convex portion 54, the sheet A does not wind around the peripheral surface of the overlap roll 55. Although the first to third embodiments have been illustrated with respect to the configuration of the overlapping portion 5, the present invention is not limited to these embodiments, and the trailing end portion of the preceding sheet A is the succeeding sheet. Any mechanism may be used as long as the tip end portion of the leaf sheet A can be vertically overlapped.

【The invention's effect】

According to the present invention, the sheet A fed from the feeding side feeding means B is received on the lower side of the feeding side feeding means B in the feeding path of the sheet side sheet A and the speed is lower than that of the feeding side feeding means B. When the feeding-side feeding means C feeds the succeeding sheet A from the feeding-side feeding means B to the receiving-side feeding means C, the feeding speed of the succeeding sheet-like sheet A by the feeding-side feeding means B is set. And the feeding speed difference between the feeding speed of the preceding sheet-fed sheet A by the receiving-side feeding means C and the leading end of the succeeding sheet-fed sheet A on the feeding-side feeding means B side In the single-wafer sheet overlapping device, which is configured to overlap the rear end portion of the single-wafer sheet A, the succeeding single-wafer sheet A on the side of the supply side feeding means B
The leading end of the sheet is the preceding sheet A on the receiving side feeding means C side.
When the sheet is fed to the trailing end of the sheet, the feeding speed difference between the front and rear single sheets A by the feeding means B and C becomes large, and the front and rear single sheets A are overlapped. Since the acceleration / deceleration driving means E for accelerating / decelerating one of the feeding means B is provided so that the feeding speed difference between the front and rear sheets A by the feeding means B, C becomes small, A remarkable effect can be obtained. That is, when the leading edge of the subsequent sheet A on the feeding side feeding means B side overlaps the trailing edge of the preceding sheet sheet A on the receiving side feeding means C side, the acceleration / deceleration driving means E
Drives one of the feeding means B to accelerate and decelerate,
In order to increase the feed speed difference between the front and rear sheet-by-sheets A due to B and C, the feed speed difference is used even though the front-and-back sheet-by-sheets A are sequentially overlapped using the feed speed difference. The front end portion of the subsequent sheet A can be reliably and promptly overlapped with the rear end portion of the preceding sheet A by the amount of the increase in the. Further, when the front and rear sheet-by-sheets A are overlapped with each other, the feeding speed difference between the sheet-feeding means B and C is increased so that the sheet-by-sheets A are surely overlapped. The feeding speed difference between the two feeding means B and C can be reduced as a whole as compared with the case in which the feeding speed difference is set to be large, and the feeding speed of the entire feeding path is made sufficiently large to achieve high speed. be able to. Moreover, after the front and rear single-wafer sheets A are in the overlapped state, the acceleration / deceleration driving means E is used so that the difference in the feed speed between the front and rear single-wafer sheets A by the both feeding means B and C becomes small. Since one of the feeding means B is driven, it is possible to reduce the difference in the feeding speed between the feeding means B and C at the normal time other than the time of overlapping. Therefore, when the leading end portion of the subsequent sheet A sent by the supply-side feeding means B reaches the receiving-side feeding means C and is then passed from the feeding-side feeding means B to the receiving-side feeding means C, The sheet A is compressed from both sides in the feeding direction between the both feeding means B and C due to the difference in feeding speed between the both feeding means B and C, so that the sheet A corrugates in the thickness direction or becomes wrinkled and jams. Therefore, even a thin single sheet A can be reliably prevented from being damaged. In other words, after the front and rear single-wafer sheets A are in the overlapped state, the feed speed difference between the two feeding means B and C is reduced, so that the feed speed at the time of overlapping is high, , The succeeding sheet A can be smoothly and surely sent from the feeding side feeding means B to the receiving side feeding means C, and the passing operation at the time of handing the sheet A between both feeding means B, C Can be done very smoothly. Further, since it is not necessary to make the feeding speed of the feeding side feeding means B itself abnormally high in order to speed up the whole, even if a plurality of sheet A are stacked, the feeding side feeding means B is used. During the feeding of the single sheet A, no misalignment occurs between the upper and lower individual sheets A. When the front and rear single-wafer sheets A are overlapped with each other, the feed speed difference between the front and rear single-wafer sheets A is increased to surely overlap the front and rear double-wafer sheets A, while the front and rear double-wafer sheets A are overlapped. After A is in the overlapped state, the feed speed difference between the feeding means B and C is made small, so that the movement distance of the sheet A required from the start of the overlap to the completion of the overlap can be made small. Of course, the whole feeding path is very short and the whole device can be miniaturized. In addition, the interval between both feeding means B and C is shortened, and the thin sheet is weak like paper. Even the sheet A can be easily and surely overlapped.

[Brief description of drawings]

FIG. 1 is an overall layout view of a continuous cutting and accumulating device showing a first embodiment of the present invention, FIG. 2 is a sectional side view of the same transverse direction cutting portion, and FIG. 3 is a sectional side view of the same overlapping portion, FIG. 4 is a perspective view of the kicker roll driving unit, FIGS. 5 and 6 are side views of the kicker roll driving unit, FIGS. 7 and 8 are side views of the stacking unit, and FIG. FIG. 10 is a side view showing a second embodiment of the wrap, and FIG. 10 is a side view showing a third embodiment of the overlapping portion. 5 ... Overlap part, 10 ... 1st conveyor, 29 ...
… Kicker roll, 30 …… Second conveyor, 31 …… Upper overlap roll, 32 …… Lower overlap roll, 43 …… Catch roll, A …… Single sheet, B ……
Supply side feeding means, C ... Receiving side feeding means, D ... Lifting means, E ... Acceleration / deceleration driving means.

Claims (1)

(57) [Claims] 1. The sheet A fed from the feeding side feeding means B is received on the lower side of the feeding side feeding means B in the feeding path of the sheet feeding sheet A and at a lower speed than the feeding side feeding means B. The receiving side feeding means C is arranged and the feeding side feeding means B is arranged.
When the subsequent sheet A is supplied to the receiving side feeding means C from the following sheet A by the feeding side feeding means B
Of the leading sheet A by the receiving side feeding means C and the feeding speed difference between the feeding speed of the preceding sheet A of the receiving side feeding means C and the leading end portion of the succeeding sheet of sheets A on the feeding side feeding means B side of the receiving side feeding means C side. In a sheet-fed overlapping device in which the trailing edge of the preceding sheet A is overlapped, the leading end of the subsequent sheet A on the supply side feeding means B side is received on the receiving side feeding means C side. When the sheet A of the preceding sheet is overlapped with the trailing end of the sheet A, the feeding means B, C
After the feed speed difference between the front and rear sheets becomes large, and the front and rear sheets A become overlapped,
A sheet comprising an acceleration / deceleration driving means E for accelerating / decelerating one of the feeding means B so that the feeding speed difference between the front and rear sheets A by the feeding means B, C becomes small. Leaf sheet overlap device.