JPH0761818B2 - 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 plate on which paper is stacked is automatically raised and a spare paper stacking device that stacks the next paper during feeding are provided. In a sheet-fed stacking device for a sheet-fed printing press, a plurality of grooves extending in the front-rear direction are arranged side by side on the upper surface of the paper-stacking plate, and are positioned behind the paper-stacking table so as to be horizontal in the front-rear direction. A pair of left and right guide rails that extend, a fork support that is supported between these left and right guide rails and is driven to move back and forth in the front-rear direction, and a groove in the paper stack plate that is supported by this fork support and that is raised to move back and forth. A plurality of forks to be inserted into and removed from the fork, an elevating means for elevating the forks by elevating the guide rails, a fork receiver provided on the machine frame side for supporting the forks in the insertion position, and a preliminary loading. The above paper stacking device for paper A passage of the conveying device for moving the al paper pile board provided, were provided with the passage below the guide rail.

[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 amount of paper being fed decreases and the paper loading platform rises to a predetermined position, the fork support platform moves forward, the fork is inserted into the groove of the paper loading platform, and the fork receiver moves up to support the fork.
The paper that has been used up continues to be fed while being received by the fork, and the released paper stack descends. Then, remove the empty paper stack and feed the next paper onto the paper stack that has been stacked on the paper stack.When the paper stack is raised, the upper end surface of the paper becomes the paper received by the fork. When approaching, the rise of the paper tray stops temporarily. After adjusting the position of the upper and lower paper,
The paper tray moves up slightly and the upper and lower papers come into contact with each other, so the fork is pulled out and normal paper feeding is started.

〔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 juxtaposed in the left-right direction on the upper surface of the paper stack plate 10, and 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. . The paper 11 is sucked one by one from the upper one by a sucker device (not shown) to be supplied to the printing unit, and the paper stacking table 9 is automatically raised according to the reduction of the paper 11 due to 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 that can travel on the rail 12 by hand, and on this trolley 14, 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. In addition, the left and right columns that are erected on the floor
A pair of left and right brackets 18 are slidably fitted on a guide shaft 17 connecting the upper ends of the 16 brackets.
A front pad 19 for abutting and aligning the front end of the paper 11A is hung on the paper 18 with its lower end slidably engaged with a guide 20.
The front pad 19 is moved and adjusted in the left-right direction according to the paper size. Furthermore, a pair of left and right horizontal pads 22 that aligns the side edges of the paper 11A by abutting the side edges of the paper 11A are movably supported in the left and right directions on the brackets 21 that are fixed to the left and right columns 16 in pairs, corresponding to the paper size. It is configured to move and adjust.

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 has a roller 27 pivotally attached to one end,
A guide portion 25a at the other end is slidably fitted in the guide grooves 24a, 16a so as to be able to move up and down between a descending work position shown by a solid line in FIG. 1 and an ascending and retracting position shown by a chain line. Has been done. 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, a sprocket 33 pivotally mounted on the sprocket shaft 30 is stretched with a chain 34 having a weight suspended at one end, and the sprocket 35 on the sprocket shaft 30 and the left and right horizontal stays are attached.
A sprocket 38 mounted on a round stay 37 that connects the rear end of the chain 36 and a chain with a weight suspended at one end
39 are stretched. The lower ends of the chains 34, 39 are fixed to the front and rear ends of the left and right racks 26, respectively.
The rack 26 is configured to move up and down integrally with the guide rails by rotating the motor 28 in the forward and reverse directions. 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 side plate 41 on both sides, and a fork support base integrally formed by a square stay 42 and a pipe stay 43 having a rectangular cross section connecting the side plates 41 and extending in the left-right direction.
The roller 44 pivotally attached to the rack 41 is supported by the rack 26, and the roller 44 is supported along the rack 26 and the guide rail 25 integral therewith.
It is formed so that it can move in the front-rear direction while rolling 44. 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 on the pinion shaft 46.
The pinion 50 pivotally mounted on the pinion shaft 46 meshes with the rack 26. By doing so, when the motor shaft of the motor 45 rotates, the pinion 50 rotates via the chain 49,
The fork support 40 is configured to move forward and backward while rolling the pinion 50 on the rack 26 that meshes with the rack 26. Such a fork support 40 pipe stay 43
A plurality of forks 51 formed in a rod shape and extending horizontally in the front-rear direction are provided so as to project at the same pitch as the grooves 10a of the paper stack plate 10, and the tip ends of the left and right guide rails 25 are formed. It is slidably supported by a holder 53 shown in FIG. 8 which is fixed to a square stay 52 having a rectangular cross section for connecting the front ends thereof. With this configuration, the fork support base 40 moves forward when the guide rail 25 is in the lowered state, and
When the 51 moves forward, it moves to the groove 10 of the pile 10 in the raised position.
Support the paper 11B that has been inserted into a and is running low.

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 around the sprockets 56 and 57, and the driving shaft 54 is rotationally driven by a driving device (not shown) to raise the lifting bar 59 to the illustrated position. 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. With this configuration, the fork 51 inserted in the groove 10a is
When removing the paper, if 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, the paper 11B will not be displaced.

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 matching pinion 50 rotates,
While rolling the pinion 50 on the rack 26, the fork support base 40 advances, 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 90 is separated, when the drive shaft 3 rotates, the paper stacking base 9 carries the 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 rotates to raise the paper stacking base 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 instructed, the drive shaft 3 slightly rotates, the paper stacking platform 9 rises, 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 this moves forward, and
Hold the edges of the contact parts of 11B and 11A. In this state, the motor 45 rotates in the reverse direction and the fork support base 40 moves backward,
51 also retreats and comes out between the upper and lower papers 11B and 11A. Since the weight of the paper 11B is applied to the fork 51 when the fork 51 is removed, the papers 11B and 11A try to shift in the removal direction of the fork 51, but they are held by the paper retainer 63 and are not displaced. After removing the fork 51, air cylinder
The piston rod 62 of 61 moves backward and the paper retainer 63 moves away.

In the case of maintenance and inspection work of the sheet feeding device, the guide rail 25 is moved up to the position of the chain line in FIG. 1 together with the fork 51 and the fork support base 40 and is in the storage state. Work can be carried out.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, the paper stacking platform that mounts the paper stacking plate on which the paper is stacked and automatically ascends, and the spare paper stacking device that stacks the next paper during feeding. In the sheet feeding device of the sheet-fed printing press provided with, a plurality of grooves extending in the front-rear direction are juxtaposed on the upper surface of the sheet stacking plate, and the sheet stacking device is positioned behind the paper stacking plate and is horizontally oriented in the front-rear direction. A pair of left and right guide rails, a fork support that is supported between these left and right guide rails and is driven to move back and forth in the front-back direction, and a fork support of the paper stack plate that is supported by this fork support and that is in the ascended position due to its forward and backward movement. A plurality of forks to be inserted into and removed from the groove, an elevating means for elevating and lowering the forks by elevating and lowering the guide rails, and a fork receiver provided on the machine frame side for supporting the forks in the insertion position are provided. By doing so, easy operation Allows continuous feeding without stopping the machine, improving operability and eliminating wasted paper due to machine stoppage. Is improved. In addition, because of the structure, it is easy to automate a series of operations, so if this is automated, no skill is required and operability and productivity are further improved.

Further, according to the invention of the present application, by providing a passage of the transporting device for moving the spare stacked paper sheets from the spare paper stacking device to the paper stacking table, and disposing this passage below the guide rail, the spare stacked paper sheets are provided. Can be moved to the paper stack accurately and quickly, and since the passage of the carrier is arranged below the guide rail which is an empty space, the installation space can be reduced.

[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 paper stacking device, 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.

Claims (1)

[Claims] 1. Paper feeding of a sheet-fed printing press having a paper stacking platform on which a paper stacking plate on which paper is stacked is automatically raised and a spare paper stacking device for stacking the next paper during feeding. In the paper stacking device, a plurality of grooves extending in the front-rear direction are provided in parallel on the upper surface of the paper stack plate, and a pair of left and right guide rails that are located behind the paper stacking table and extend horizontally in the front-rear direction, A fork support which is supported between these left and right guide rails and is driven to move back and forth in the front-rear direction, and a plurality of forks which are supported by this fork support and which are inserted into and removed from the grooves of the stack of sheets in the raised position due to their advance and retraction. An elevating means for elevating and lowering the fork by elevating and lowering the guide rail, a fork receiver for supporting the fork at the insertion position which is provided on the machine frame side, and a spare stacking paper from the spare stacking device. Transporting device to move to paper stack A passage provided, the paper feed paper product device sheet-fed printing press, characterized in that the said passage is disposed below the guide rail.