WO2022264648A1

WO2022264648A1 - Paper ejection device for printing press

Info

Publication number: WO2022264648A1
Application number: PCT/JP2022/016409
Authority: WO
Inventors: 望月泰宏; 小林信也
Original assignee: リョービＭｈｉグラフィックテクノロジー株式会社
Priority date: 2021-06-15
Filing date: 2022-03-31
Publication date: 2022-12-22
Also published as: JP2022190982A

Abstract

Provided is a paper ejection device for a printing press, capable of preventing the top sheet on a lowered pallet from shifting rearward.　This paper ejection device for a printing press is equipped with a shutter device having a shutter member 9 that is movable between an insertion position where a pallet with sheets stacked thereon is lowered and the shutter member 9 is inserted on the stacked sheets from the bottom side to the top side in the sheet top-bottom direction so as to temporarily support the subsequent falling sheets, and a retraction position where the shutter member 9 is out of the insertion position to the bottom side in the sheet top-bottom direction. This paper ejection device for a printing press comprises an edge guide 10 that prevents the sheets from moving to the bottom side in the sheet top-bottom direction, by abutting on the bottom-side edge in the top-bottom direction of the sheets stacked on the pallet lowered below the shutter member 9 that is toward the insertion position.

Description

Paper discharge device for printing press

The present invention relates to a paper ejection device for a printing press.

The paper delivery device of the printing press grips printed sheets with a chain gripper provided on an endless chain, and releases the chain gripper at an appropriate position to sequentially transfer the printed sheets onto a pallet placed on a paper delivery table. It is configured to be dropped and stacked. During stacking of the sheets, a sheet stopper is opposed to the edge of the rear side (paper feed side, vertical direction) of the sheets so that the sheets are stacked on the rear side (paper feed side, vertical direction). ground side). When the number of sheets on the pallet reaches a predetermined number, the sheet discharge table is lowered so that the sheets stacked on the pallet are positioned below the shutter bar into which the sheets are inserted, and the shutter to insert the sheets is lowered. Move the sheet stopper upward to avoid interference with the bar. After that, the shutter bar is inserted onto the stacked sheets from the top and bottom sides of the sheets so that the shutter bars support the subsequently falling sheets. While this is being supported, the paper discharge table is further lowered, the pallet on which the sheets are stacked is removed from the paper discharge table, and the empty pallet is placed on the paper discharge table until it reaches directly below the shutter bar. Raise the pallet. After that, by moving the inserted shutter bar to a position where it is removed from the top and bottom of the sheet, the sheet supported by the shutter bar on the empty pallet and the subsequently falling sheet are removed. Place it (see Patent Document 1, for example).

In the configuration of Patent Document 1, in order to retract the sheet stopper upward when inserting the shutter bar from the vertical side of the sheet, the rear side of the upper sheet stacked on the lowered pallet is There is nothing to restrict the movement (paper feeding side, top and bottom direction). For this reason, the sheets on the upper part of the pallet may shift (flow) to the rear side (paper feeding side, top and bottom direction). By the way, the sheets released from the chain gripper and stacked (after printing) are held until the air layer formed between the upper and lower sheets escapes to the side of the sheets and disappears. Since it floats slightly with respect to the sheets below and the stacking position becomes unstable, it tends to move easily.

Japanese Patent No. 4227824

The present invention has been made to solve such problems, and it is an object of the present invention to provide a paper discharge device for a printing press that can prevent the upper sheet on the lowered pallet from shifting to the rear side.

In order to achieve the above object, a sheet discharge device for a printing press according to the present invention includes a sheet stopper for preventing sheets discharged and stacked on a pallet from moving in the top-to-bottom direction; The pallet on which the papers are stacked is lowered, and the insert is inserted from the bottom side to the top side of the stacked sheets in order to temporarily support the subsequent falling sheets. a shutter device having a shutter member movable between a position and a storage position deviated from the insertion position in the top-to-bottom direction of the sheet, wherein the insertion position The end that prevents the movement of the sheets in the vertical direction by contacting the ends on the vertical side of the sheets stacked on the pallet lowered below the shutter member facing the It is characterized by having a part guide.

According to the above configuration, the edge guide abuts the top-bottom side edge of the sheets stacked on the pallet lowered below the shutter member toward the insertion position, thereby lowering the pallet. It is possible to prevent the upper sheet of paper from slipping to the bottom side (rear side) in the top-to-bottom direction.

Further, in the sheet discharging device for a printing press according to the present invention, the edge guides are provided at a position where the edge guide faces the edge of the sheet on the ground side in the top-bottom direction from the ground side, and from the facing position to the ground side in the top-bottom direction. It may be constructed so as to be movable to a retracted position away from it.

As described above, by locating the end guides at the opposing positions, the ends can be reliably guided. In addition, the edge guide is positioned at the retracted position before the sheets on the lowered pallet are removed together with the pallet, the empty pallet is placed, and the empty pallet is lifted to a predetermined position. It is possible to prevent the pallet from contacting the end guide and damaging the end guide.

Further, in the paper ejection device for a printing press according to the present invention, the end guide moves to the facing position before the shutter member, which moves from the storage position to the insertion position, reaches the insertion position. may be started.

By the way, when the shutter member reaches the insertion position, the uppermost sheet on the lowered pallet and the lowermost sheet supported by the shutter member are separated. , is completely cut off, so that the movement of the uppermost sheet on the lowered pallet is not restricted. Therefore, the uppermost sheet on the lowered pallet is removed by initiating movement of the end guides to the opposed position before the shutter member reaches the insertion position. The time during which the movement of the body is unregulated can be shortened. Therefore, it is possible to prevent the uppermost sheet on the lowered pallet from shifting to the rear side.

Further, in the paper discharge device of the printing press according to the present invention, when the end guide lowers the pallet on which the sheets are stacked, the vertical direction between the retracted position and the facing position is shifted from the retracted position. The shutter member is configured to be movable to an intermediate standby position, and starts moving from the standby position to the facing position before the shutter member moving from the storage position to the insertion position reaches the insertion position. may

According to the above configuration, when the pallet is lowered, if the end guides are moved to the standby position closer to the stacked sheets than the retracted position, the end guides will face each other as the shutter member moves. Shorter travel distances to positions can be achieved. Consequently, the sheet located at the top of the lowered pallet remains unrestrained for a shorter period of time. Therefore, it is possible to further prevent the uppermost sheet on the lowered pallet from shifting rearward.

Further, in the sheet discharging device for a printing press according to the present invention, the shutter member is attached to a pair of frames configured to be vertically movable so as to be lowered as the number of sheets supported by the shutter member increases. The end guides may be attached to the pair of frames.

According to the above configuration, since the end guide descends together with the shutter member, an appropriate positional relationship between the shutter member and the end guide can be maintained. Also, collision between the shutter member and the end guide that occurs when only the shutter member continues to descend can be avoided.

According to the present invention, the upper portion of the lowered pallet is guided by the edge guide to guide the top-to-bottom side edges of the sheets stacked on the pallet lowered below the shutter member. It is possible to provide a paper discharge device for a printing press that can prevent the sheet of paper from shifting to the rear side.

1 is a schematic side view showing a paper discharge device of a printing press; FIG. FIG. 2 is a perspective view of the same paper ejection device as viewed from the paper ejection side; FIG. 3 is a perspective view of the paper discharge device of FIG. 2 omitting a vacuum suction vehicle; FIG. 2 is a perspective view of the same paper ejection device as viewed from the paper feeding side; (a), (b), and (c) are operation explanatory diagrams showing a state immediately before the shutter device is operated. (a), (b), and (c) are explanatory diagrams showing an operation for operating the shutter device to support the succeeding sheet. (a), (b), and (c) are diagrams for explaining the operation of removing the lowered sheets and raising the empty pallet to a predetermined position. (a) and (b) are explanatory diagrams for retracting the shutter bar and returning it to the origin position.

The paper ejection device of the printing press of the present invention will be described below with reference to the drawings. The paper discharge device is provided for printing sheets fed from a paper feeding unit (not shown) by a printing unit (not shown) and stacking the printed sheets.

As shown in FIG. 1, the paper discharge device includes a paper discharge table 2 which serves as a paper discharge place for printed sheets (hereinafter simply referred to as sheets) 1 (see FIG. 5(a)), and a paper discharge table. an endless conveying chain 4 having a gripper 3 for conveying up to a position above the table 2; A plurality of vacuum suction wheels 6 (see FIG. 2) are attached at intervals to a support shaft 5 (see FIG. 2) extending in the direction, and a pallet 7 (see FIG. 5A) placed on the discharge table 2. ), a shutter device 8 for supporting the succeeding sheets 1 by being actuated when the number of sheets 1 stacked on the sheet 1 reaches a set number, and a shutter member of the shutter device 8 when the shutter device 8 is actuated. An end guide 10 (see FIG. 2) for guiding the top and bottom side ends of the printed sheets 1 stacked on the pallet 7 lowered below the bar 9 is provided. In the following description, the beginning side of the sheet 1 in the conveying direction (paper feeding unit side) is defined as the rear end side, and the rear end side in the conveying direction (sheet discharge unit side) is defined as the front end side.

The sheet ejection table 2 is a plate-shaped rectangular sheet, is suspended via a chain 11, is configured to be vertically movable by an elevator motor 12, and is released from the gripper 3 to drop and stack the sheets. It is controlled by a control unit (not shown) so as to keep the drop of the sheet 1 substantially constant by descending corresponding to the stacking height (stacking thickness) of 1 . When the number of sheets 1 on the pallet 7 reaches the set number, the sheet discharge table 2 is lowered to take out the pallet 7 on which the sheets 1 are stacked, and then the empty pallet is placed on the sheet discharge table 2. 7 is placed, and the discharge table 2 is raised to a predetermined position.

The vacuum suction wheel 6 has a plurality of suction ports on its peripheral surface and is configured to rotate at a peripheral speed slower than the speed of the conveying chain 4 . Therefore, the suction force of the vacuum suction wheel 6 acts on the transported sheet, so that the sheet 1 released from the gripper is decelerated and then dropped onto the sheet discharge table 2 (pallet 7). The sheet discharging device includes a front support 13 against which the front edge of the falling sheet abuts, a sheet stopper 14 for regulating the trailing edge of the sheet, and a trailing edge of the sheet 1 before the shutter device 8 operates. It further comprises a back-cutting blade 15 operative to support the .

The front support 13 has the function of contacting the front ends of the sheets that have fallen, and also functions as a regulating member that regulates the front ends of the sheets stacked on the pallet 7 .

The sheet stoppers 14 are attached below the rear end side of the vacuum suction wheel 6 and are provided in plurality (two in FIG. 2) at intervals in the width direction of the sheet 1 . Each sheet stopper 14 is configured to be swingable about an axis (front-rear axis) along the conveying direction of the upper end portion, and is swingably attached to a rectangular plate-like portion having the same width and from the plate-like portion. A wide portion wider than the plate-like portion (in FIG. 2, it has a triangular shape, but may be of any shape) is provided on the spaced side, and an air cylinder (not shown) is operated. 2, the posture can be changed between a retracted posture in the horizontal direction and an operating posture in which the retracted posture is swung clockwise at an angle of less than 90° when viewed from the rear and faces obliquely downward. Specifically, the sheet stopper 14 takes a retracted posture along the horizontal direction by pushing a contact portion (not shown) from the operating posture, similarly to the end guide 10 described later. Further, by moving the abutting portion that abuts and supports the sheet stopper 14 in the retracted posture to the side away from the sheet stopper 14, the sheet stopper 14 assumes an operating posture by its own weight, and the sheet stopper 14 is held in that operating posture. The abutting portion abuts and supports. With this configuration, even if another object collides with the sheet stopper 14 in the operating posture from below, the sheet stopper 14 escapes upward, so that the sheet stopper 14 can be prevented from being damaged.

The back cutting blade 15 smoothly inserts the shutter bar 9 of the shutter device 8 between the uppermost sheet and the subsequent sheets among the sheets stacked on the pallet 7. It is provided for supporting the trailing edge of the following sheet so that it can be carried out. Specifically, the back-cutting blade 15 is made of a thin steel plate and has a belt-like shape that is long in the width direction. support position to support the trailing edge of the following falling sheet 1 . When the supporting is not performed, the back cutting blade 15 is positioned at a non-supporting position away from the stacked sheets toward one end in the width direction. In the above-mentioned paper discharge device, the front support 13 is installed at a fixed position, and the vacuum suction wheel 6, the sheet stopper 14, and the back cutting blade 15 are arranged so that the sheet stopper 14 faces the trailing edge of the sheet 1. Therefore, they are configured to move in the vertical direction (conveyance direction) while maintaining a constant positional relationship with each other according to the size of the sheet 1 in the vertical direction.

The shutter device 8 includes a plurality of sets of

sprockets

17A, 17A, 17B, 17B attached to a pair of inverted L-shaped frames 16, 16 (only one side is shown in FIG. 1), and a plurality of sets of

sprockets

17B, 17B. It consists of an endless chain 18 wound around

sprockets

17A, 17A, 17B, 17B and a plurality of cylindrical rollers rotatably stretched over the

endless chains

18, 18 on both sides via bearings (not shown). and a motor 19 capable of forward and reverse rotation for rotating each endless chain 18 .

The motor 19 is connected to a driving sprocket 17A arranged in the lower part, and by driving the motor 19, the shutter bar 9 is lowered and the sheet positioned at the top of the pallet 7 and the straight cutting blade 15 are separated. The insertion position (see FIG. 7(a)) inserted between the sheet positioned at the bottom of the following sheet supported by , and the storage position deviated from the insertion position to the top and bottom direction of the sheet (See FIGS. 1 and 5A).

The

frames

16, 16 on both sides are configured to be suspended by a chain 20 and to be lifted and lowered by an elevating motor 21 capable of forward and reverse rotation. That is, while the following sheet 1 is supported by the shutter bar 9, every time the predetermined number of sheets is reached, the elevator motor 21 is driven to lower the shutter bar 9 by a predetermined amount, thereby causing the subsequent sheet 1 to drop. It is possible to maintain a substantially constant drop.

The end guide 10 is longer than the sheet stopper 14, and is made of metal and has a substantially rectangular plate-like shape extending linearly. The end guides 10 are spaced apart in the width direction of the sheet 1 on a movable body 23 supported by

guide rails

22, 22 extending in the front-rear direction, which are attached to the inner surfaces of the

frames

16, 16 on both sides, respectively. A plurality (four in FIG. 2) are attached. By driving the vertical movement motor 24 shown in FIG. 4, the plurality of end guides 10 can be moved back and forth along the guide rails 22, 22 together with the movable body 23. As shown in FIG. Further, the plurality of end guides 10 move the operating shafts 26 shown in FIG. Then, as shown in FIG. 2, the retracted posture along the horizontal direction (see the two-dot chain line) and the retracted posture are swung clockwise or counterclockwise at an angle of less than 90° when viewed from the rear to face obliquely downward. It is configured so that the posture can be changed between the operating posture (see the solid line). Specifically, the two end guides 10 on the left side of FIG. The end guide 10 is swung counterclockwise by pressing against the portion below the swing fulcrum of the end guide 10 to take a retracted posture along the horizontal direction. The end guide 10 on the right side of FIG. 2 moves from the operating posture in the axial direction of the operating shaft 26 so that the abutment portion (not shown) provided on the operating shaft 26 becomes the swing fulcrum of the end guide 10 . The end guide 10 is swung clockwise to take a retracted posture along the horizontal direction by contacting and pushing against the upper portion. In addition, the abutment portion (not shown) that abuts and supports the end guide 10 in the retracted posture moves away from the end guide 10, so that the end guide 10 assumes the operating posture under its own weight. , the abutting portion abuts and supports the end guide 10 in its operating posture. Since the upward swing of the end guide 10 in the operating posture is not restricted in this way, even if another object (for example, the pallet 7) collides with the end guide 10 in the operating posture from below, It is possible to prevent the end guide 10 from being damaged by the upward swinging (escaping) of the end guide 10 .

As described above, the end guide 10 and the shutter bar 9 are attached to the

frames

16, 16 on both sides. The end guide 10 moves up and down in conjunction with the lifting and lowering of 9. Therefore, an appropriate positional relationship between the shutter bar 9 and the end guide 10 can be maintained. Further, collision between the shutter bar 9 and the end guide 10 that occurs when only the shutter bar 9 continues to descend can be avoided. Furthermore, since the end guide 10 and the shutter bar 9 are attached to the

frames

16, 16 on both sides, they and their related members can be easily unitized. Therefore, it is possible to improve the assembling workability of the paper discharge device.

A description will be given of the movement of the paper discharge device when the paper discharge device configured as described above is operated.

Printing by the printing press is started, and the printed sheets are conveyed to the paper discharge device and stacked on the pallet 7 (see FIG. 5(a)). Then, when the number of sheets on the pallet 7 reaches the set number, as shown in FIG. After the sheet discharge table 2 is lowered, the sheet stopper 14, which is in an operating posture facing obliquely downward, is switched to a retracted posture along the horizontal direction, and the back cutting blade 15 located at the non-supporting position is moved to the supporting position (Fig. 5(c)). 5(a)-(c), the end guide 10 is in the retracted position.

Subsequently, the paper discharge table 2 is lowered again by a fixed amount by driving the lifting motor 12 (see FIG. 6(a)). At this time, the trailing edge of the succeeding sheet is supported by the back cutting blade 15 positioned at the support position, and the vertical movement motor 24 is driven to move (advance) the edge guide 10 to the standby position. In this embodiment, the standby position is set 20 mm rearward of the facing position. Next, the motor 19 is driven to move the shutter bar 9 to the rear cutting blade 15 supporting the trailing end of the succeeding sheet 1 and the lowermost sheet 1 on the discharge table 2 . It is moved forward from between it and the sheet 1 positioned at the top, and the air cylinder 25 is operated to change the end guide 10 at the standby position from the retracted posture along the horizontal direction to the operating posture facing obliquely downward. (See FIG. 6(b)). When the shutter bar 9 on the starting end side in the movement direction of the shutter bars 9 passes the back cutting blade 15, the back cutting blade 15 is moved to a non-supporting position where the trailing edge of the sheet 1 is not supported.

The end guide 10 starts moving from the standby position to the facing position before the shutter bar 9 reaches the insertion position shown in FIG. 7(a). Specifically, in the case of a sheet having substantially the maximum size in the vertical direction as shown in the figure, the edge guide 10 waits when the shutter bar 9 has entered the upper half or more of the sheet 1 in the vertical direction. Start moving from one position to the opposite position. Then, at the timing when the shutter bar 9 reaches the insertion position, the end guide 10 moves to the facing position where the uppermost sheet 1 on the pallet 7 is restricted (FIG. 6 ( c) see). Therefore, the end guide 10 can be moved to the facing position without delay. When the edge guides 10 move (advance) to the facing position, if there is a sheet that is shifted rearward, the edge guide 10 pushes it forward, so that the top and bottom of the sheet are aligned. The ends on the top side can be neatly aligned. By the way, at the insertion position where the shutter bar 9 is completely inserted into the sheet 1, the sheet 1 positioned at the top of the sheet 1 on the lowered pallet 7 is supported by the shutter bar 9. The sheet 1 positioned at the bottom of the existing sheet 1 is completely separated, and the sheet 1 positioned at the top of the sheet 1 on the lowered pallet 7 is completely separated. movement becomes unregulated. Therefore, if the end guide 10 reaches the opposing position earlier than the shutter bar 9 reaches the insertion position, the uppermost sheet on the lowered pallet 7 will be pushed to the rear side. It is possible to reliably prevent slippage. In the facing position of the edge guide 10, it is preferable that the edge guide 10 is in contact with the trailing edge of the uppermost sheet on the pallet 7. As shown in FIG.

When the shutter bar 9 is completely inserted into the sheet 1 (when it reaches the insertion position), the sheet discharge table 2 is further lowered by driving the lifting motor 12 (see FIG. 7(a)). It should be noted that the air layer formed between the uppermost sheets on the pallet 7 has almost disappeared due to the elapsed time, and the uppermost sheet 1 is unstable. The state has been resolved. When the descent of the paper discharge table 2 is completed, the pallet 7 on which the sheets 1 are stacked is removed from the paper discharge table 2, and then the empty pallet 7 is placed on the paper discharge table 2 and discharged. Raise the paper table 2 (see FIG. 7(b)). During the period from when the paper discharge table 2 starts to rise until it rises to a predetermined position, the end guide 10 is changed from the operating posture facing obliquely downward to the retracted posture along the horizontal direction, and is moved forward and backward. Move (retreat) to the retracted position. This prevents the rising empty pallet 7 from coming into contact with the end guides 10 .

When the empty pallet 7 rises to a predetermined position (directly below the shutter bar 9 (see FIG. 7(c)), the shutter bar 9 starts to move to the retracted position (see FIG. 8(a)). When the movement to the storage position is completed, the ejection table 2 is lowered each time the predetermined number of sheets is reached, as in the previous time, and the shutter bar 9 moved to the storage position is lifted together with the

frames

16 and 16 to the origin position. (See two-dot chain line in FIG. 8(b).) At this time, the end guide 10 also rises in conjunction with the rise of the shutter bar 9.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the gist of the present invention.

In the above-described embodiment, the shutter member is composed of a plurality of shutter bars 9, but it may be composed of a band-shaped belt, and the shutter member may be of any construction as long as it can support the following sheets. There may be.

Further, in the above-described embodiment, sheets are continuously stacked on the pallet 7 placed on the discharge table 2, and when the number of stacked sheets reaches a set number, the pallet on which the sheets are stacked 7 is lowered, the shutter device 8 is operated to support the subsequently falling sheets, thereby separating the sheets vertically. A so-called cutting method may be used in which a block is inserted between paper sheets and at the four corners of the partition plate to vertically separate a bundle of sheets for each predetermined number of sheets and stack the sheets with a gap therebetween.

In the above-described embodiment, the end guide is moved up and down in conjunction with the up and down movement of the shutter member. There may be.

In the above-described embodiment, the edge guide 10 is configured to move to the retracted position, the waiting position near the edge of the sheet, and the facing position facing the edge of the sheet. The guide 10 may be configured to move directly from the retracted position to the confronting position without going through the standby position. In this case, the moving speed of the end guide 10 is set so that the shutter member can reach from the retracted position to the confronting position from the time when the shutter member enters more than half of the upper side of the sheet in the vertical direction until it is completed. Alternatively, the movement start timing of the end guide 10 to the facing position is advanced.

Also, in the above embodiment, the end guide 10 is swung to change its posture, but it may be configured to move vertically to change its posture.

DESCRIPTION OF SYMBOLS 1... Sheet, 2... Paper discharge table, 3... Gripper, 4... Conveyor chain, 5... Spindle, 6... Vacuum suction vehicle, 7... Pallet, 8... Shutter device, 9... Shutter bar (shutter member), DESCRIPTION OF SYMBOLS 10... End guide, 11... Chain, 12... Lifting motor, 13... Front pad, 14... Sheet stopper, 15... Back cutting blade, 16... Frame, 17A, 17B... Sprocket, 18... Endless chain, 19... Motor , 20... Chain 21... Elevating motor 22... Guide rail 23... Movable body 24... Vertical movement motor 25... Air cylinder 26... Operating shaft

Claims

A sheet stopper that prevents sheets discharged and stacked on a pallet from moving in the vertical direction, and sheets that fall after the pallet on which the sheets are stacked are lowered. and a storage position deviated from the insertion position to the top and bottom side of the sheet on the stacked sheets to temporarily support the sheet A shutter device having a shutter member movable between
The vertical movement of the sheets stacked on the pallet, which is lowered below the shutter member toward the insertion position, is brought into contact with the edge on the vertical side. A delivery device for a printing press, characterized in that it comprises a blocking end guide.
The edge guide is configured to be movable between a facing position facing the edge of the sheet on the ground side in the vertical direction from the ground side and a retracted position spaced apart from the facing position to the ground side in the vertical direction. 2. The paper discharge device for a printing press according to claim 1, wherein:
3. The end guide according to claim 2, wherein said end guide begins to move to said opposed position before said shutter member moving from said retracted position to said inserted position reaches said inserted position. A paper ejection device for a printing press.
The end guide is configured to be movable from the retracted position to a standby position located midway between the retracted position and the facing position in the vertical direction when the pallet on which the sheets are stacked is lowered, 4. The printing press according to claim 3, wherein the shutter member moving from the storage position to the insertion position starts to move from the standby position to the facing position before reaching the insertion position. Paper ejection device.
The shutter member is attached to a pair of frames configured to move up and down so as to descend as the number of sheets supported by the shutter member increases, and the end guides are attached to the pair of frames. 5. The paper discharge device for a printing press according to claim 1, characterized in that: