JPH0757647B2 - Paper feeder for sheet-fed printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sheet feeding device of a sheet-fed printing press, which is preliminarily stacked when the sheets stacked on the sheet stack are lost by sheet feeding. The present invention relates to a paper feeding and stacking device for feeding paper without stopping the machine.

[Conventional technology]

In a printing operation by a sheet-fed printing press, the paper stacked on the paper stack on the paper stack of the paper feeder is sucked by the sucker device one by one from the upper layer and supplied to the printing unit to perform printing. To be done. In this case, the paper stacking platform automatically rises according to the reduction in the amount of paper due to the paper feeding, and the upper end surface of the stacked paper holds a constant height. Then, when the paper on the stack is exhausted due to paper feeding, the machine is stopped, the stacking platform is lowered to the lower limit, and the empty stacking plate and the stacking plate on which the paper has been stacked in advance are replaced. , The paper stacking table is raised to a predetermined position, the paper stacking table is automatically raised, and paper feeding is restarted.

However, in such a conventional paper feeding and stacking device, the machine is stopped and the transshipment is performed, so that the productivity is reduced and the amount of waste paper generated when the printing is restarted is increased. A paper-feeding paper stacking device capable of transposing papers without stopping has been proposed and implemented.

[Problems to be Solved by the Invention]

However, this kind of conventional paper stacking apparatus requires a skilled technique and is not necessarily satisfactory in operability. Further, the work is required in a short time, and if the user is not accustomed to it, a paper feed failure occurs during this period, and the machine often stops.

[Means for Solving the Problems]

In order to solve such a problem, according to the present invention, a paper stacking platform on which a paper stacking board on which paper is stacked is automatically raised, and a pair of left and right guide rails are provided in the front-rear direction behind the paper stacking platform. A support member that extends horizontally is provided between these left and right guide rails and is driven to move back and forth in the front-rear direction. The support member is supported by this support member and moves back and forth to form a groove in the paper stack. A plurality of forks that are inserted and removed at the raised position are provided, and when the forks are removed, both the paper below the paper supported by this fork and the paper above the next paper located below this paper The paper retainer that abuts and presses against the edge is moved forward and backward in the perspective direction with respect to the edge of the paper so that it is separated from the edge of the paper when at least the next paper is moved up to approach the paper supported by the fork. On the guide rail side so that it can be freely Digits.

[Work]

The paper stacked on the paper stack via the paper stack is sucked by the sucker device and supplied to the printing unit, and the paper stack is automatically raised as the paper is fed. During this printing operation, the following sheets are stacked on the stacking plate of the preliminary stacking device. Then, when the paper stack is raised to a predetermined position because the amount of paper being fed decreases, the support member moves forward and the fork is inserted into the groove of the paper stack, so that the forked paper is fed while being received by the fork. As the paper continues, the opened paper tray descends. Then, remove the empty paper stack, feed the next paper onto the paper stack until it is loaded on the paper stack, and the paper stack will move up so that the top edge of the paper approaches the paper received by the fork. At that point, the rise of the paper tray is temporarily stopped. After adjusting the position of the upper and lower paper, the paper stack will rise slightly and the upper and lower paper will contact,
The fork is pulled out, and the paper feed shifts to normal. When the fork is pulled out, the paper retainer moves forward and presses the edge of the paper around the fork, so that the paper does not shift following the removed fork.

〔Example〕

1 to 8 show an embodiment of a paper feeding and stacking device according to the present invention, FIG. 1 is a schematic side view of the whole, and FIG. 2 is a plan view of a fork and its supporting portion and a driving device, FIG. 3 is a plan view of the lifting drive device, FIG. 4 is a side view of the same,
FIG. 5 is a front view of the forward / backward drive device for a fork, FIG. 6 is a side view of the same, FIG. 7 is a side view of a stacking plate, and FIG. 8 is a sectional view of a paper retainer. In the figure, a pair of left and right frames 1 formed in an inverted L shape are erected on the floor foundation at the rear of a printing unit (not shown). Is supported by the floor. A drive shaft 3 and a driven shaft 4 are rotatably supported between the left and right frames 1, and four sprockets 5 and two sprockets 6 are respectively mounted on the shafts 3 and 4. It is pivoted. Lifting chains 7,8 suspended on sprockets 5,6
A paper stacking board 9 formed in a rectangular plate shape is hung on the paper stacking board, and a paper stacking board 10 is mounted on the paper stacking board 9.
The paper stack plate 10 is formed in a rectangular plate shape, and a plurality of grooves 10a extending in the front-rear direction are arranged side by side on the upper surface of the paper stack plate 10. The paper 11 is stacked on the paper stack plate 10. Has been done. The drive shaft 3 is connected to a drive device (not shown) and is rotationally driven in the forward and reverse directions, and the forward and reverse rotations cause the paper stacking platform 9 to move up and down via the elevating chains 7 and 8. . Then, the paper 11 is sucked one by one from a lifted one by a sucker device (not shown) and supplied to the printing unit, and the paper stacking table 9 is automatically raised in accordance with the reduction of the paper 11 by the paper feeding. There is. This elevating drive device can be switched to a manual mode, and the paper stacking table 9 can also be elevated and lowered by a push button operation or the like.

Two rails 12 are laid on the floor from the bottom of the paper stack 9 facing rearward. Above the rear end of the rail 12, there is a spare paper stacking device indicated by reference numeral 13. It is provided. The preliminary stacking device 13 is provided with a trolley 14 which can be driven by hand on the rails 12, on which the same pile 10A as the pile 10 is mounted. The next paper 11A is stacked on 10A during the printing operation. Reference numeral 15 is a lock handle for fixing the truck 14 to the rail 12 when piled up. A pair of left and right brackets 18 are slidably fitted on a guide shaft 17 that connects the upper ends of the left and right columns 16 standing on the floor, and each bracket 18 has a paper 11A. A front pad (19) for abutting and aligning the front ends of the is suspended by slidably engaging the lower end with a guide (20). The front pad 19 is moved and adjusted in the left-right direction according to the paper size. Further, a pair of left and right horizontal pads 2 that aligns the side edges of the paper 11A by abutting the brackets 21 fixed to the left and right columns 16 one by one
2 is movably supported in the left-right direction, and is configured to move and adjust according to the paper size.

A fork for temporarily receiving a small amount of paper, a supporting device for the same, and a driving device are provided between the preliminary paper stacking device 13 thus configured and the paper stacking table 9. That is, at the rear end of the horizontal member of the frame 1, a pair of left and right lifting guides 24 parallel to the support columns 16 are fixed.
The guide groove 24a is provided in 24, and the guide groove 16a corresponding to the guide groove 24a is provided in the column 16.
Reference numeral 25 denotes a pair of left and right guide rails formed in a long plate shape extending in the front-rear direction, and a rack 26 having a substantially square cross section is integrally fixed to the inside by bolts. The rail 25 is slidably fitted in the guide grooves 24a and 16a with the roller 27 pivotally attached to one end and the guide portion 25a at the other end, so that the rail 25 can be moved to the descending work position and the chain line shown in FIG. It is supported so that it can move up and down between it and the lifted and retracted position shown. A motor 28 having a horizontal motor shaft is fixed to a motor base 28a fixed to the upper end of one of the lift guides 24, and a sprocket 29 axially attached to the motor shaft and the left and right lift guides. A chain 32 is stretched between a sprocket 31 on a sprocket shaft 30 slidably mounted between 24. Further sprocket shaft 30
A chain 34 with a weight suspended at one end is stretched on a sprocket 33 that is axially mounted on the upper side, and a sprocket 35 on the sprocket shaft 30 and a round end that connects the rear ends of the left and right horizontal stays 36. Sprocket loosely fitted on stay 37
A chain 39 having a weight suspended at one end is stretched over 38 and. The lower ends of the chains 34 and 39 are fixed to the front and rear ends of the left and right racks 26, respectively.
The rack 26 is rotated by rotating 28 in the forward and reverse directions.
Is configured to move up and down together with the guide rail. In the vicinity of the sprocket 33, a limit switch (not shown) that closes the contacts with a striker provided on the chain 34 side is provided to prevent the guide rail 25 from rising and falling as set. Is configured.

Reference numeral 40 denotes a fork support base that is integrally formed with both sides and side plates 41, and a corner stay 42 and a pipe stay 43 that have a rectangular cross section and that are connected to each other and extend in the left-right direction. The roller 44 pivotally mounted on the rack 26 is supported by the rack 26, and is formed so as to be movable in the front-rear direction while rolling the roller 44 along the rack 26 and the guide rail 25 integrated with the rack 26. A motor 45 is mounted on the fork support base 40, and a pinion shaft 46 is rotatably supported between the left and right side plates 41. A chain 49 is stretched between a sprocket 47 mounted on the motor shaft of the motor 45 and a sprocket 48 mounted on the pinion shaft 46, and a pinion 50 mounted on the pinion shaft 46.
Meshes with rack 26. By doing so, when the motor shaft of the motor 45 rotates, the pinion 50 rotates via the chain 49, and the pinion 50 on the rack 26 meshing with this rotates.
The fork support base 4 is configured to move forward and backward while rolling. Such fork support 40
In the pipe stay 43, a plurality of forks 51 formed in a rod shape and extending horizontally in the front-rear direction are provided with the grooves 10 of the paper stack 10.
It is projected at the same pitch as a, and its tip end is slidably supported by a holder 53 shown in FIG. 8 fixed to a square stay 52 having a rectangular cross section connecting the front end portions of the left and right guide rails 25. Has been done. By being configured in this way,
When the fork support base 40 moves forward and the fork 51 moves forward when the guide rail 25 is in the lowered state, this is inserted into the groove 10a of the paper stack plate 10 at the raised position and the paper 11B
Support.

A drive shaft 54 and a driven shaft 55 are rotatably supported between the left and right frames 1 in FIG.
5 has 4 sprockets 56 and 2 sprockets 57
And are respectively pivoted. A lifting bar 59 is suspended from a lifting chain 58 stretched over the sprockets 56 and 57, and the driving shaft 54 is rotated by a driving device (not shown) to raise the lifting bar 59 to a position shown in the drawing. The fork 51 inserted in the groove 10a is supported by the elevating bar 59.

Further, a pair of left and right air cylinders 61 extending in the front-rear direction are fixed to the angular stay 52, and the working end of the piston rod 62 thereof has a triangular cross section as shown in FIG. The paper retainer 63 that extends in the direction
Is fixed through. The fork 51 is the paper retainer.
It penetrates 63 holes slidably. And air cylinder
61 is provided with a lock device 62a for fixing the piston rod 62 at a predetermined timing, and the paper retainer 63 is
A paper detection switch 63a is provided which detects that the paper 11A, 11B has come into contact with the paper and outputs a signal. With this configuration, when the fork 51 inserted in the groove 10a is removed, the paper retainer 63 is moved forward by the operation of the air cylinder 61 and the rear edge of the paper 11B is pushed, so that the paper 11B is removed. There is no deviation. When pressing the paper, press the paper detection switch.
The piston rod 62 is configured to be fixed by the lock device 61a after a moment when 63a comes into contact with the paper 11A, 11B and is detected, so that the paper 11A, 11B is pre-loaded. The presser foot 63 can be fixed.

Since the motor 45 moves up and down and in the front-rear direction in this device, the electrical wiring for this motor 45 is indicated by the symbol in the figure.
It is supported by a flexible chain indicated by 65 and 66. Further, a limit switch 6 for restricting the movement of the fork 51 at three locations is formed by contacting the striker 67 on the fork support base 40 side with the guide rail 25 on one side to close the contact.
8,69,70 are fixed.

The operation of the sheet feeding and stacking device configured as described above will be described. The paper 11 stacked on the stacking board 9 via the stacking board 10 is
The sucker sucks the sheets one by one from the upper layer and supplies them to the printing unit. Since the drive shaft 3 is rotationally driven by the drive device in accordance with the sheet feeding, the sheet stacking table 9 rises through the elevating chains 7 and 8, and the upper end surface of the sheet 11 always maintains a predetermined height. While printing while feeding in this way, the stacking plate 10 placed on the trolley 14 of the preliminary stacking device is
The paper 11A is stacked on A with the front pad 19 and the horizontal pad 22 aligning the edges of the paper. Usually, the guide rail 25 is housed in the upper part, and when it is detected that the paper stacking table 9 has been lifted up by a detector (not shown) fixed to the frame 2, below the position near the position where the fork 51 is inserted, the lowering operation position is set. Comes down to.

When the paper tray 9 rises as the paper is fed and rises to the position shown by the chain line in FIG. 1, the limit switch activates the motor 45 and the pinion shaft 46 rotates via the chain 49 to mesh with the rack 26. Since the pinion 50 rotates, while rolling the pinion 50 on the rack 26, the fork support
40 moves forward, and the fork 51 also advances below the reduced paper 11B and is inserted into the groove 10a of the paper stack 10. The forward limit of the fork 51 is regulated by the limit switch 70. Simultaneously with the insertion of the fork 51, the drive shaft 54 is rotated by the drive device, and the descending elevating bar 59 is raised to the position shown in FIG. Since the paper 11B and the fork 51 are supported by this and the paper stacking base 9 is separated, when the drive shaft 3 rotates, the paper stacking base 9 carries an empty paper stack 10 and is shown by a solid line in FIG. It descends to the lower limit position.

Then, after removing the empty paper pile 10, the front pad 19 and the horizontal pad
22 and open the truck 14 on the rail 12 to advance the paper 11
After supplying A, remove the truck 14 and move it to the stacking position. The paper stacking board 9 is formed of a pair of bars and has a structure in which the truck 14 can be put in and taken out at its lower limit position, but detailed description thereof will be omitted.

Simultaneously with the supply of the paper 11A, the drive shaft 3 is rotated to raise the paper stack 9 on which the paper 11A is mounted, and the upper end surface of the paper 11A is detected by a detector (not shown) provided at a lower position close to the fork 51. Then, the operation is temporarily stopped, and the upper and lower papers 11B and 11A are aligned with each other by operating an adjusting device (not shown).
When the work completion is supported, the drive shaft 3 is slightly rotated to raise the paper stack 9, and when the upper and lower papers 11B and 11A come into contact with each other, this is detected by a load detector (not shown) provided on the elevating bar 59. At this time, the piston rod 62 of the air cylinder 61 moves forward, and the paper retainer 63 fixed to the piston rod 62 moves forward to move the upper and lower paper 11
Hold the contact edge of B and 11A. In this state, the motor 45 rotates in the reverse direction and the fork support base 40 retreats.
Also retreat and come out between the upper and lower paper 11B, 11A. Fork 5
Since the weight of the paper 11B is applied to the fork 51 when the 1 is removed, the papers 11B and 11A try to shift in the removal direction following the fork 1, but the upper and lower papers 11B and 11A around the fork 51 are removed. Since the trailing edge of the paper is pressed by the paper presser 63, it does not shift. Also, the paper detection switch 63a is set to the paper 11A, 11B
The lock device 61
Since the paper presser 63 is fixed by a and the paper presser 63 is fixed in a state where preload is applied to the papers 11A and 11B, even if the paper size changes, this can be dealt with without adjustment. After the fork 51 is pulled out, the piston rod 62 of the air cylinder 61 retracts and the paper retainer 63 retracts.

When entering between the paper stacking table 9 and the spare paper stacking device 13 for maintenance or inspection of the sucker device, etc.
When 28 is started, the guide rail is pulled through the chains 32, 34, 39.
Since 25 is raised to the overhead position shown by the chain line in FIG. 1 together with the fork 51 and the fork support base 40 and is in the retracted state, the work can be easily performed by being positioned below it.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, in the sheet feeding device of the sheet-fed printing press, the sheet stacking device of the sheet feeding device and the pair of left and right guides extending in the front-rear direction behind the sheet stacking device. A rail is provided to support a supporting member that is driven to move back and forth in the front-rear direction between these guide rails, and is inserted into and removed from a groove provided in the paper stack by the support member when the paper stack is raised. A plurality of forks are provided, and when removing this fork, contact the edges of both the lower paper of the paper supported by this fork and the upper paper of the next paper located under this paper. When the paper presser that presses in contact with it is lifted at least the next paper to move closer to the paper supported by the fork, it is separated from the paper edge so that it can withstand the paper edge and can move back and forth in the perspective direction. Installed on the guide rail side By doing so, you can continuously feed paper without stopping the machine with a simple operation, improving operability and eliminating the occurrence of wasted paper due to machine stoppage, and even if you are not used to Does not occur,
Productivity is improved. Further, because of the structure, it is easy to automate a series of operations, so if this is automated, operability and productivity will be further improved. Furthermore, when pulling out the fork, both paper edges of the lower paper of the paper supported by the fork and the upper paper of the next paper located under this paper can be pressed by the paper presser, so both paper edges are Without slipping,
In addition, when the next paper is raised and brought closer to the paper supported by the fork, the paper presser is separated from the paper edge so that the next paper does not contact the paper presser. Since the paper is positioned below the supported paper without being displaced, it is possible to prevent defective feeding and generation of damaged paper. Further, since the paper retainer is provided on the guide rail side so that it can be moved back and forth in the perspective direction with respect to the edge of the paper, the paper retainer can be retracted to the guide rail side in the printing state. Since the paper does not come into contact with the paper retainer, it is possible to prevent the paper feed failure and the damaged paper from occurring.

[Brief description of drawings]

1 to 8 show an embodiment of a sheet feeding and stacking device of a sheet-fed printing press according to the present invention, FIG. 1 is a schematic side view of the whole, and FIG. 2 is a fork and its support and drive. FIG. 3 is a plan view of the lifting / lowering drive device, FIG. 4 is a side view of the lifting / lowering drive device, FIG. 5 is a front view of the forward / backward drive device for forks, and FIG. 6 is a side view of the same. FIG. 7 is a side view of the paper stack, and FIG. 8 is a sectional view of the paper retainer. 9: Paper stack, 10: Paper stack, 10a: Groove, 11,11A, 11B
…… Paper, 13 …… Spare stacking device, 16 …… Post, 24 …… Elevation guide, 25 …… Guide rail, 26 …… Rack, 40 …… Fork support, 44 …… Roller, 45 …… Motor , 49 …… Chain, 50 …… Pinion, 51 …… Fork, 54 …… Drive shaft, 58 …… Chain, 59 …… Lift bar, 61 …… Air cylinder, 62 …… Piston rod, 63 …… Paper presser .

Claims (1)

[Claims] 1. A sheet feeding apparatus for a sheet-fed printing press, which is equipped with a sheet stack on which paper is loaded and which is automatically raised, in a horizontal direction in the front-rear direction behind the sheet stack. A pair of left and right guide rails extending to the left and right are provided, and a support member that is driven to move forward and backward is supported between these left and right guide rails. The support member is fixed to this support member and moves forward and backward to form a groove formed in the paper stack plate. A plurality of forks that are inserted and pulled out at the rising position of the stack of sheets are provided, and when the forks are pulled out, the paper under the paper supported by this fork and the top of the next paper located under the paper The paper retainer, which contacts and presses both paper edges, is separated from the paper edge so that the paper retainer is separated from the paper edge at least when the next paper is moved up to approach the paper supported by the fork. The guide rail is set so that it can move back and forth in the perspective direction. Paper feeding paper product device sheet-fed printing press, characterized in that provided on the side.