JP2564534Y2 - Sheet feeder for sheet-fed printing press - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a sheet-fed printing press, in which paper loaded on a paper stack is supplied to a printing unit, and paper discharged from a paper ejection chain after printing is stacked on the paper stack. The present invention relates to a paper supply / discharge device.

[0002]

2. Description of the Related Art In a printing operation by a sheet-fed printing press, paper is stacked on a stacking board mounted on a stacking board of a sheet feeding apparatus by a sheet feeding stacking apparatus. The stacked paper is sucked one by one from the upper layer by a sucker device, supplied to a printing unit, and subjected to printing. The paper feeding device provided in the paper feeding device includes a pair of lifting bars suspended from a paper feeding frame by a lifting chain, and a pair of paper loading bars mounted on the lifting bars at right angles thereto. In addition, at the back of the paper feeder, a spare trolley provided with a trolley for mounting and moving a paper stack on which paper is loaded, and a paper alignment member for aligning the top and bottom and left and right edges of the loaded paper. A stacking device is provided.

[0003] With this configuration, the paper stacked on the stacking plate on the stacking bar in the sheet feeding device is
As described above, the lifting chain is supplied to the printing unit by the sucker device, and the elevating chain is wound up in accordance with the sheet feeding, and the elevating bar automatically rises with the paper stacking bar and the paper stacking board on which the paper is loaded. While the stacking is being performed in this manner, the next sheet is stacked on the stacking board mounted on the trolley of the spare stacking apparatus, with the left and right sides of the top and bottom aligned by the paper alignment member.

When the paper being fed runs out, the paper feed stops,
Remove the empty pile board and pile bar and take it out of the machine.
The trolley is advanced to move the paper stack loaded with paper into the paper feed position. Then, when the lifting chain is rewound and the lifting bar at the lower end is lowered, the lifting mechanism moves down while avoiding the new paper bar by the escape mechanism, and moves down to the lower side of the paper bar to stop. When the chain is wound and the elevating bar is raised, the stacking board supported by the elevating bar via the stacking bar rises with the paper loaded, and after raising this to a predetermined position, it is switched to automatic ascent. To resume paper feeding.

In the apparatus described above, when the paper being fed is exhausted, the machine is stopped and the next paper is supplied, so that the preparation time is prolonged and the operation rate of the machine is reduced. Since the amount of waste paper generated at the time of resuming printing increases, the present applicant has proposed a paper feeder capable of reloading paper without stopping the machine, as disclosed in JP-A-1-322221. Therefore, this will be briefly described below.

This paper feeder has a pair of paper trays suspended from a paper feed frame by a lifting chain. A plurality of grooves extending in the vertical direction. Between the sheet feeding device and the spare sheet stacking device, a fork support table that moves forward and backward with respect to the sheet feeding device along a horizontal guide rail is provided. A fork protrudes toward the paper feeding device.

[0007] With this configuration, when the amount of paper being fed is reduced and the paper stacking plate rises to a predetermined height, the fork support base advances and the fork is inserted into the groove of the paper stacking plate. Because it supports less paper, wind another chain and lightly contact the lifting bar with the fork.
The fork and the stack are separated. Then, the paper stack and the paper stack supported by the stack are lowered to the lower limit position, the empty stack is taken out of the machine, and then the trolley loaded with the next paper is advanced to the paper feed position. Then, when the lifting chain is wound up, the trolley can be retracted, and the paper stacking plate on which the next paper is loaded rises, so that the upper end of the paper is attached to the lower end of the paper being fed. At the contact position, the lifting of the paper stack is stopped, and the paper is transferred to regular paper feeding by removing the fork.

On the other hand, a sheet discharging device of a sheet-fed printing press includes a sheet discharging paper comprising a pair of lifting bars suspended from a discharging frame by a lifting chain, and a paper stack mounted on the lifting bars. A stacking device is provided, and a stacking plate is placed on a stacking platform of the discharge sheet stacking device. After the printing, the paper held by the claws of the paper discharge chain and conveyed by the travel of the paper discharge chain is released from the grip of the pawl above the paper stacking board, and is dropped and stacked on the paper stacking board. The paper stacker is automatically lowered by detection of the sensor according to the amount of paper loaded.

When the amount of paper loaded reaches a predetermined amount, the machine is stopped and the paper loading platform of the paper ejection paper loading device is lowered until the paper loading bar almost touches the floor as in the prior art. Replacing the used stacking board with an empty stacking board, raising the stacking board and restarting printing would reduce the machine operation rate as in the case of the paper feeder. In recent years, a paper discharge temporary receiving device is provided to continue paper discharge without stopping the machine.

That is, the paper discharge stacking device of the paper discharge device is provided with a fork or the like that is horizontally inserted into a falling path of paper that is discharged from the discharge chain and falls.
When the stacking amount of paper on the stacking plate reaches a predetermined amount, insert a fork etc. between the falling sheets and insert the fork etc. Lower the loaded paper platform until the loading bar touches down, replace the fully loaded paper platform with an empty paper platform, raise the platform, and then move the fork etc. in the horizontal direction. When the paper is pulled out, the temporarily received paper is transferred to the empty paper stacking board, so that the process proceeds to the normal paper discharging operation.

[0011]

However, in such a conventional paper feeding / discharging apparatus, empty paper is supplied for a short time while paper being fed or falling is temporarily received by a fork or the like. Since the stacking board must be replaced with a stacking board full of paper, the removal of the empty stacking board to the outside of the machine is delayed, or the supply is delayed because the empty stacking board is not in the predetermined position. In some cases, waste paper may be generated, and there is a problem that the operation requires experience. In addition, there is a problem that the burden on the operator increases because the transporter must reciprocate between the paper feeding device and the paper discharging device by loading an empty paper stack on the carrier. Therefore, it is conceivable that a conveying device is provided below the machine base to convey the paper stack, but the oil or the like falls on the paper stack being conveyed, adheres to the paper stack, and removes the paper loaded thereon. There is a problem of causing contamination, but if the oil receiver is provided, there is a problem that maintenance work is hindered.

The present invention has been made in view of the above points, and conveys a paper stack discarded by a paper feeder easily and in a short time without being contaminated with oil or the like falling from a machine base. It is an object of the present invention to provide a sheet feeding / discharging device of a sheet-fed printing machine which can supply the sheet to a sheet discharging device.

[0013]

In order to achieve the above object, according to the present invention, the paper feeding device is detached from the paper feeding device below the machine between the paper feeding device and the discharged paper loading device. A transport device for transporting the paper stack supplied to the paper ejection stacker and reciprocating a cover covering the stacker between the two stackers is provided.

[0014]

When the amount of paper being fed is reduced to a predetermined amount, only the paper is temporarily received by the fork, the empty paper stack is lowered, and the replaced paper stack is raised to replace the fork. The paper feeding is continued by pulling it out. The lowered empty paper stack is transported to a paper discharge device by a transport device provided below the machine base, and is made to stand by. When transporting the paper stack, the cover that covers the paper stack is also transported at the same time, so that the paper stack is not contaminated with oil or the like that falls from the machine base. The cover, which has fulfilled the role, returns to the paper feeding device side by leaving the waiting paper stack by the reverse rotation of the transport device, and stands by for the next transport.

On the other hand, when the discharged paper reaches a predetermined amount, a fork or the like is advanced to temporarily receive the dropped paper being discharged, and the loaded paper stack is lowered and taken out of the machine. When the empty stacking board in standby as described above is supplied on the lowering stacking board, the stacking board on which the empty stacking board is mounted is raised, and then the fork or the like is pulled out, When the temporarily receiving paper is transferred to an empty paper stack, the process is shifted to regular paper discharge.

[0016]

1 to 7 show an embodiment of a sheet feeding / discharging device for a sheet-fed printing press according to the present invention. FIG. 1 is a front view of a multicolor printing sheet-fed printing press in which the present invention is applied, and FIG. FIG. 3, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, FIG.
FIG. 5 is a schematic front view of the printing press and the transport device for explaining the operation of the transport device, and FIGS. 6 and 7 are schematic front views of the transport device for explaining the operation of the transport device, respectively.

In FIG. 1, a four-color sheet-fed rotary printing press 1 comprises:
The printing apparatus includes a paper feeding device 2, a printing unit 3 for four colors, and a paper discharging device 4, and the printing unit 3 is provided on a floor indicated by reference numeral 5 in FIG. Further, the paper feeding device 2 and the paper discharging device 4 are fixed in a pit 6 provided by dug down a floor 5. At the rear end of the pit 6, a lift 7 having a stroke corresponding to the height difference between the pit 6 and the floor 5 is provided, and a paper stack 9 on which paper 8 is loaded is transported at another location. After the plurality of rollers are mounted on the platform of the lift 7 arranged in parallel, the lift 7 descends and the platform lands on the bottom surface of the pit 6.

Between the lift 7 and the paper feeder 2, a fork insertion device 10 is fixedly provided on the bottom surface of the pit 6 and stands upright. Rollers 11, 12, and 13, each of which has a plurality of rolling rollers arranged in parallel, are fixed on the bottom surface of the pit 6 in contact with the front and rear. The paper stack 9 loaded with the paper 8 reloaded on the roller base 11 is configured to be supplied to the roller base 13 of the sheet feeding device 2 via the roller base 12.

The sheet feeding device 2 includes a lifting chain (not shown) suspended from a pair of left and right sheet feeding frames 14 formed in an inverted L shape and a pair of paper stack bars suspended by the lifting chain. The paper stacking device 9 is provided, and the paper stacking plate 9 loaded with the paper 8 supplied onto the roller base 13 is
The paper bar that is lowered to a position lower than the roller base 13 is configured to support a protruding portion from the roller base 13 to the side and move up and down. Further, a sucker device (not shown) is supported by the paper feed frame 14, and the paper 8 on the paper stacking plate 9 is sucked one by one and sent out onto the feeder board 15 by a suction port provided in the sucker device. At the same time, the elevating chain is wound in accordance with the reduction of the paper 8 due to the paper feeding, and the paper stacking plate 9 on which the paper 8 is loaded is automatically raised.

The fork insertion device 10 is provided with a guide rail 17 which is driven by a motor 16 to be raised during maintenance work or the like and to be lowered to a position shown in the drawing during printing work. Is provided with a fork support (not shown) that moves forward and backward with respect to the sheet feeding device 2. A plurality of forks protrude from the fork support toward the paper feeder 2. When the paper 8 being fed is reduced and the paper stacking plate 9 rises to a predetermined height, the fork support is provided. The table moves forward and the fork is inserted into the groove of the paper stack 9 to support the reduced paper 8,
The empty paper stack 9 is configured to descend and land on the roller base 13.

Each printing unit 3 includes left and right frames 18 erected on the floor 5, printing cylinders such as a plate cylinder 19 having both ends pivotally supported by these frames 18, an ink device, a water supply device, and the like. The paper 8 sent to the feeder board 15 is supplied to the impression cylinder of the printing unit 3 of the first color via a disc plate and a swing device (not shown), and the paper 8 is moved between the impression cylinder and the blanket cylinder. It is configured such that printing is performed on the passing paper 8. And the printing unit 3 for the second to fourth colors
Is conveyed by a paper ejection chain after the printing of the second to fourth colors is performed on the paper 8 conveyed through the paper. A safety cover 20 moves up and down to open and close the work surface.

The paper discharge device 4 is provided with a pair of left and right paper discharge frames 21 formed in an inverted L-shape, and the lifting chain 22 suspended from its horizontal member is provided at the lower end thereof. An elevating bar 23, which constitutes the discharged paper stacking device, is also fixed. And in this device,
A pit 24 which is continuous with the pit 6 and is flush with the pit 6 is provided between the sheet feeding device of the sheet feeding device 2 and the sheet discharging device of the sheet discharging device 4. A roller conveyor 25 in which a number of rollers are arranged in parallel is laid on the bottom surface of the pit 24. The empty stacking board 9 which has been used in the above is transported to the discharge stacking device of the discharge device 4. And
The conveyed paper stack is configured to wait on the terminal end of the roller conveyor 25 as indicated by reference numeral 9A in FIG. 1 and then to be supplied onto the elevating bar 23 of the paper discharge stacking device.

At the end of the pit 24, there is provided a pit 26 of the same plane orthogonal to the pit 24. In the pit 26, a roller base 27 in which a plurality of rollers are arranged in parallel, A vertically movable lift 28 having a plurality of rollers arranged in parallel is provided continuously. Then, the temporary stacking device 9 using a fork or the like (not shown)
The paper stack 9 loaded with the paper 8 replaced with the paper 8 is moved to the lift 28, and is lifted up to be flush with the floor 5 and transported by a forklift or the like.

Further, in the pit 26 extending below the machine base, a pair of transport chains as a transport device indicated by reference numeral 29 in FIG. These transport chains 2
9 is formed to be approximately the same length as the roller conveyor 25,
Both ends of a cover 30 that covers the conveyed paper stack 9 from above are fixed to the chain link. Then, by reciprocating in the forward and reverse directions at the same speed as the transport chain 26, the paper stack 9 is covered by the cover 30 during transport, and the paper stack 9
Is stopped at the transport end, only the cover 30 returns to the transport start end, and waits for the paper stack 9 to be discharged from the paper feeding device 2.

The operation of the paper feeding / discharging device for a printing press configured as described above will be described. The paper stack 9 loaded with the paper 8 at another place is advanced on the floor 5 by a forklift or the like to a position just before the start end of the pit 6, and is replaced on the ascending lift 7. The roller is the roller table 1
Lower the paper 8 so that it is at the same level as the first roller.
The paper stack 9 loaded with the paper is moved from the platform of the lift 7 to the roller platform 11.
Replace with Further, a paper stack 9 on which the paper 8 is loaded
Is moved onto the roller table 13 of the sheet feeding device 2 via the roller table 12, and the protruding portion of the sheet stack 9 from the roller table 13 is supported by the lifting bar 23. In addition, only once, the empty sheet stack 9 is supported on the elevating bar 23 of the sheet discharging device 4 and is raised to a predetermined position.

When the printing operation is started after the preparation as described above, the papers 8 on the paper stacking plate 9 are sucked one by one through the suction opening of the sucker device and sent out onto the feeder board 15, and the difference plate and the swing device are removed. After that, it is supplied to the printing unit 3. The paper 8 printed by the printing unit 3 is conveyed while being held by the claws of the paper discharge chain, released from the claws at the end of the conveyance, and discharged and stacked on the paper stacking plate 9 of the paper discharge device 4. You.
In the sheet feeding device 2, the paper stacking plate 9 automatically rises according to the amount of paper 8 reduced by paper feeding, and in the paper discharging device 4, the paper stacking plate 9 automatically lowers according to the increase in the amount of paper 8 due to paper discharging.

When the paper 8 being fed is reduced and the paper stack 9 rises to a predetermined height, the fork supporting table supported by the guide rail 17 of the fork insertion device 10 moves forward and the fork is moved to the paper stack 9. Since the paper feeding is continued by supporting the reduced paper 8 inserted in the groove, another chain is wound up and the lifting bar is lightly contacted with the fork. As a result, the fork and the paper stack 9 are separated, so that the elevating bar 23 and the paper stack 9 supported by the bar are lowered to the lower limit position, and the used empty paper stack 9 is used. 9 is placed on the roller conveyor 25 from the roller base 13. Thus, when the paper stack 9 loaded on the paper 7 prepared on the lift 7 during the printing operation as described above is replaced on the roller base 13 and the elevating chain 22 is wound up, the stack Since the paper 9 rises, the paper 8 is stopped at a position where the upper end surface of the paper 8 contacts the lower end surface of the paper 8 being continuously fed, and the paper feed is started by pulling out the fork.

On the other hand, the empty stacking board 9 which has been replaced at the start end of the roller conveyor 25 is conveyed by traveling of the roller conveyor 25, as shown in FIG. Since the roller 30 travels at the same speed as the roller conveyor 25 and travels to the transport end portion with the cover 30 waiting at the transport start end covering the paper laminate 9, oil or the like that falls from the machine base is removed by the paper laminate 9. And the paper stack 9 is not contaminated. When the roller conveyor 25 stops as shown in FIG.
As shown by, it stops at the end of the roller conveyor 25 and waits. The transport chain 30 is also a roller conveyor 25.
At the same time, the transport chain 29 travels in the reverse direction to transport the cover 30 toward the paper feeder 2 and stops at the transport start end as shown in FIG. And waits for the next paper stack 9 to be discharged.

When the amount of paper 8 loaded on the paper stacking plate 9 in the paper discharging device 4 reaches a predetermined amount, a fork or the like is inserted between the falling papers 8, and the falling paper is removed by the fork or the like. The elevating bar 2 on which the paper stack 9 full of paper is placed during temporary receiving
3 is moved down, the stacking board 9 full of sheets is moved to the lift 28 via the roller stand 27 in the pit 20, and the empty stacking board 9 </ b> A in the waiting state is moved into the sheet discharging device 4. Move.

Then, the lifting bar 23 is raised by the lifting of the lifting chain 22 to raise the paper stack 9, and the paper stack 9 is lifted.
When the fork or the like is pulled out in the horizontal direction in a state in which the fork or the like is lightly in contact with the fork or the like, the temporarily received paper 8 is transferred to the empty paper stack 9 and the normal paper discharging operation is started. On the other hand, the paper stack 9 loaded with the paper on the platform of the lift 28 is at the same level as the floor 5 by raising the lift 28, so that it can be easily transported to a predetermined position by a forklift or the like.

FIG. 8 is an enlarged vertical sectional view of a transfer device according to another embodiment of the present invention, corresponding to FIG. 4. In this embodiment, a cover 30 is fixed to a chain link of a transfer chain 29. This embodiment is the same as the previous embodiment, except that in this embodiment, the roller conveyor indicated by reference numeral 25 is not provided in the above-described embodiment, and the paper stack 9 is an attachment integrally formed with the chain link of the transport chain 29. It is configured to be placed and transported on top.

By doing so, the paper stack 9 is attached to the cover 3.
Although the transport is covered by 0 in the same manner as in the previous embodiment, the transport chain 29 rotates in the reverse direction at the transport end, the cover 30 returns to the paper feeder 2 side, and the paper stack 9 is not shown. The reverse movement is prevented by a stopper or the like and stopped, and the supply to the paper discharge device 4 is waited. As described above, in the present embodiment, since the roller conveyor is not provided, the structure is simplified.

In each of the above embodiments, the printing unit 3
Is provided on the floor 5, and the paper feeding device 2, the paper discharging device 4, the paper stacking device and the like are provided in the pit below the floor surface.
The paper feeding device 2, the paper discharging device 4, the paper stacking device, etc.
The printing unit 3 may be fixed on a concrete base provided on the floor and raised above the floor. In each of the above embodiments, the present invention is applied to the paper supply / discharge device that exchanges the sheet stack 9 between the paper supply device 2 and the paper discharge device 4 without stopping the machine. The present invention can be similarly applied to a paper supply / discharge device that stops and replaces the paper stacking plate 9, and a similar effect can be obtained.

[0034]

As is apparent from the above description, according to the present invention, in the sheet feeding / discharging device of the sheet-fed printing press, the sheet feeding device and the sheet discharging device are provided below the machine base. By providing a transport device that transports the paper stack to be supplied to the discharge paper stacker by removing it from the paper stacker and reciprocating a cover covering the stacker between the two stackers, There is no need to transport empty stacks between the paper feeder and the paper output device,
Labor can be reduced. In addition, there is no need to provide an empty storage space near the paper feeding device or the paper discharging device, and the space occupied by the machine can be reduced.

Further, since the transported paper stack is covered with the cover, oil or the like falling from the lubricating portion of the printing unit or the like does not fall on the paper stack, and the paper stacked on the paper stack is not affected. Is not contaminated, the amount of waste paper is reduced, and the cover moves, so that maintenance and inspection work performed from below the printing unit or the like is not hindered, and workability is improved. Also, in the case of replacing the stacking board without stopping the machine, the time required to remove the empty stacking board from the paper feeder and supply it to the paper output device is shortened, and the machine operating rate is improved. I do.

[Brief description of the drawings]

FIG. 1 is a front view of a multicolor sheet-fed printing press embodying the present invention.

FIG. 2 is a plan view of a multicolor sheet-fed printing press embodying the present invention.

FIG. 3 is a sectional view taken along the line III-III of FIG. 2;

FIG. 4 is an enlarged vertical sectional view of the transfer device.

FIG. 5 is a schematic front view of the transport device shown for explaining the operation of the transport device.

FIG. 6 is a schematic front view of the transfer device shown for explaining the operation of the transfer device.

FIG. 7 is a schematic front view of the transport device shown for explaining the operation of the transport device.

FIG. 8 is an enlarged cross-sectional view of a transfer device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printing machine 2 Paper feeder 3 Printing unit 4 Paper discharger 6 Pit 8 Paper 9 Paper stack 9A Paper stack 11 Roller stand 12 Roller stand 13 Roller stand 24 Pit 25 Roller conveyor 29 Transport chain 30 Cover

Claims (1)

(57) [Scope of request for utility model registration] 1. A sheet stack which is detached from a sheet feeding apparatus and supplied to a sheet discharging apparatus is conveyed to a lower portion of a machine base between a sheet feeding apparatus and a sheet discharging apparatus. A sheet feeding / discharging device for a sheet-fed printing press, comprising a transport device for reciprocating a cover covering a stacking plate between the two stacking devices.