JPH0335225B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a paper discharge mechanism for a sheet-fed printing press, and particularly in a mechanism that stacks printed paper using a slatted board, it is possible to control the printed paper. The present invention relates to a flow prevention device.

[Conventional technology]

In the paper discharge mechanism of conventional sheet-fed printing presses, the printed paper is sent out from the paper feed section, printed in the printing section, and transferred one by one to the paper discharge section via a chain with a gripper, and then passed through a slatted board. The sheets are stacked one after another on the paper stacking table. At this time, because the printing papers are stacked excessively on the paper stacking table, a set-off phenomenon occurs on the back side of each printing paper (a phenomenon in which the ink immediately after printing adheres to the back side of the printing paper due to the weight of the stacking of printed materials and becomes smudged). )
occurs. Therefore, as a method to eliminate this phenomenon, so-called slatting work is carried out. That is, a pair of left and right guide rails each having a U-shaped cross section are installed above the paper stacking table of the paper ejection mechanism, and the distance between them can be increased or decreased by operating a handle, and a slatted board is inserted into the guide rails outside the machine. A corner block is prepared to be inserted between the upper and lower cutting boards, and when a predetermined amount of printed paper is on the paper stacking board, the paper stacking board is lowered, and then, while watching the timing of the paper falling, it is manually placed. Then, quickly insert the board into the guide rail to catch the falling printing paper, then place corner blocks at the four corners of the lowered paper stacking platform and raise it again. This operation is repeated to sequentially stack printed papers on the paper stacking table. This planking work is generally called slatting work.

[Problem to be solved by the invention]

However, when performing this conventional slatting work, there is no paper holding plate to restrict the printing paper that is falling when the paper stacking table is lowered, making the printing paper unstable and causing the paper to become unstable. A flow phenomenon occurs. In other words, there is a paper press plate integrated with the suction wheel above the inserted grate board, but there is no paper press plate below the grate board. This unstable phenomenon of the printed paper causes the printed paper to become uneven on the paper stacking table or to fall off. To prevent this, one person pushes the grating board with his hand, and the other person holds the printing paper mid-fall to control it.

The present invention has been made in view of the above circumstances, and is intended to solve the problems that have arisen in conventional slatting operations. That is, the problems to be solved by the present invention are to solve the unstable phenomenon of printed paper that occurred due to the absence of a paper presser plate below the grating board, and to solve the problem of uneven printed paper and misalignment on the paper stacking table. This includes the ability to prevent falls, and the ability to automatically handle these issues without the need for human intervention.

[Means to solve the problem]

Developed to solve the above problems, the paper flow prevention device in the paper discharge mechanism of a sheet-fed printing press according to the present invention includes a guide plate having racks attached to both main body frames, and the guide plate. an auxiliary paper press frame that is movably attached to the board and integrally formed with a stay; and a paper press plate that is resiliently attached to the stay via a spring and that regulates printed paper placed on a paper stacking table or a grid board. a stopper switch that detects when the printing paper comes into contact with the paper presser plate; and a drive unit that drives a shaft that is attached to the auxiliary paper presser frame and has a gear that meshes with the rack; When the paper stacking platform is lowered by a predetermined amount, the paper presser plate moves inward to regulate the printed paper, and after this regulation, when the paper stacker further descends by a predetermined amount, the paper presser plate moves outward to regulate the printing paper. This is to cancel the .

Furthermore, it is preferable that the operation of the paper presser plate and the operation of the grate board are linked.

That is, the means of solving the problem of the present invention is to provide a paper flow prevention device in the paper discharge mechanism of such a sheet-fed printing machine, so that the unregulated state of printed paper that occurs when the grating board is inserted and lowered can be prevented. The object of the present invention is to regulate unregulated printed paper on a paper stacking table, and to automatically operate this regulating operation in accordance with the printing timing with the printing press main body.

[Effect]

(1) According to the paper flow prevention device in the paper discharge mechanism of a sheet-fed printing press configured as described above, when the paper stacking platform descends a predetermined amount, the paper presser plate is guided by the guide plate and moved inward by the drive unit. When the stopper switch comes into contact with the printed paper placed on the paper stacking table or the grating board, the paper presser plate stops and controls the printed paper instead of the paper presser surface of the paper stopper and suction wheel in the paper discharge mechanism. . After this regulation, when the paper stacking table further descends by a predetermined amount, the drive unit moves in the opposite direction, the paper press plate moves outward, and the regulation is released, and the printed paper is moved to the paper alignment surface of the paper stopper and suction wheel mentioned above. regulated.

(2) Since the operation of the paper press plate and the operation of the grate board are linked, the grate plate and the paper press plate can be operated in a timely manner with the printing operation of the printing press main body, and Can be operated automatically.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall mechanism of a conventional sheet-fed printing press. a is a paper feeding section, b is a printing section, and c is a paper discharging section. P is printing paper, S is chain, and G is gripper. Normally, in sheet-fed printing presses,
The printing paper P sent out from the paper feed section a is printed in the printing section b and is transferred one by one to the paper discharge section c via a chain S equipped with a gripper G.
Note that T is a paper stacking stand for stacking the printing papers P transferred to the paper discharge section c, and K is a paper rest.

FIG. 2 shows the main parts of a conventional paper ejecting device. A is a paper flow prevention device of the present invention. B
Slatted board, C is corner block. Note that D is a suction wheel and E is a paper alignment surface. As mentioned above, the conventional paper ejection mechanism is a paper stacking table T or a slatted board B.
When a certain amount of printed paper P is on the top, the worker lowers the paper stacking platform T by a certain amount (until the top surface of the stacked printing paper P is below the bottom surface of the grating board B to be inserted). , while watching the falling timing of the printing paper P conveyed by the gripper G, quickly insert the grating board B by hand to catch the falling printing paper P, and place it on the four corners of the paper stacking table T or the grating board B. Place corner block C and raise it again.

By repeating this operation, the printed sheets P are sequentially stacked on each grating board B. In this way,
Once a certain amount of printing paper P has been stacked on the paper stacking table T, press the set button for removing the slatted board to move the paper stacking board T to a certain position (the bottom surface of the slatted board where the top surface of the stacked printing paper is pulled in). Once the air cylinder (not shown) has been lowered to
to move the grating board B in the direction of the arrow. This movement is performed by operating an air cylinder in synchronization with the printing press body.
Then, while the printing paper P is stacked on the pulled-in grate board B, corner blocks C are set at the four corners of the grate board B, which has been lowered by a certain amount, and the paper stacking table T is raised. . At this time, a paper flow phenomenon occurs while the paper stack T is being lowered to a certain position. The device of the present invention was developed to prevent this paper flow phenomenon.

FIGS. 3 to 8 illustrate a state in which the paper flow prevention device A of the present invention is attached to the conventional paper ejection mechanism shown in FIG. 2, and its configuration. This device A is composed of an auxiliary paper presser frame 1 and a guide plate 20. The auxiliary paper presser frame 1 is used to attach a paper presser plate 4 for printing paper, and the guide plate 20
is for moving the auxiliary paper holding frame 1 to the position of the printing paper P stacked on the paper stacking table T. As shown in FIG. 6, the paper presser plate 4 is rotatably attached to the stay 3 by a fulcrum pin 7, and can be returned to its original position by a spring 6. That is, when the paper press plate 4 is pushed in by the grating board B, the paper press plate 4 is pushed to the right side via the fulcrum pin 7 as in the state shown in FIG. On the other hand, when the paper stacking table T is lowered and the grating board B is also lowered, the paper presser plate 4 is returned in the direction of the arrow via the spring 6 of the fulcrum pin 7 to regulate the printed paper P. In this way, the two paper press plates 4 are attached to the stay 3 with the stop pins 5, 5, and the stay 3 is attached to the support on both sides via the stay 2 which is screwed with the set screws 9, 9. It is screwed to the paper presser frame 1 with a set screw 13. A stopper switch n is provided on the stay 3 located between the paper press plates 4, 4. This stopper switch n consists of a stopper 11 and a switch 10 which is placed on a switch mounting base 12 and is activated by the operation of the stopper 11. In other words, as shown in FIG. 5, this stopper switch n has a stopper 11 fixed to the stay 3 via a spring 8, and is configured to be operated by the switch 10. . 14
is a shaft attached between the auxiliary paper presser frames 1, 1, and one end of this shaft 14 is linked to the motor 27 of the drive unit R, and is connected to the auxiliary paper presser frames 1, 1 via bearings 16, 16.
are each attached to a shaft. Furthermore, gears 15, 15 are attached to both ends of the shaft 14, respectively.

Reference numeral 20 denotes a guide plate that allows the auxiliary paper presser frames 1, 1 to move in the direction of the paper stacking table T. This guide plate 20 has a U-shaped cross section, and a rack 17 is formed in the lower part. ing. One end of this guide plate 20 and the lower rack 17 is connected to a bracket 21.
The brackets 21 are screwed to the frame 22 of the printing press main body through set screws 23, respectively. On the other hand, each auxiliary paper holding frame 1, 1 is movably attached to the guide plate 20 with bearings 18, 19 interposed therebetween. Therefore, the auxiliary paper presser frames 1, 1 are attached to the shaft 1.
4 gear 15 and the rack 17 at the lower part of the guide plate 20
It is configured to be able to move horizontally. Reference numeral 27 denotes a motor that drives the shaft 14, and is configured so that the shaft 14 is rotated via the gear 24 by the rotation of the motor-equipped gear 25 of the motor shaft 28. 26 is a motor mounting stand.

Next, to explain the operation of the paper flow prevention device A, first, when a certain amount of printed paper P is stacked on the grating board B, the paper stacking table T is moved so that the next grating board B is inserted. It descends by a certain amount. This paper stack T
The lowering of motor 2 is linked to this device, so motor 2
7 is driven and the shaft 14 rotates clockwise in FIG.
7, the auxiliary paper holding frame 1 moves horizontally in the direction in which the printing paper P is stacked. As a result, the stopper 11 of the stopper switch n attached to the stay 3 hits the printing paper P, the switch 10 is activated, the movement of the auxiliary paper holding frame 1 is stopped, and the falling printing paper P is regulated. Next, when an empty grating board B is inserted via a guide rail (not shown), the motor 27 is automatically driven (rotates in the opposite direction) and the auxiliary paper presser frame 1 is returned to its original position by the force of the spring 6. will return to. After preventing the paper from flowing in this way, corner blocks C are placed at the four corners of the paper stack T as before, and the paper stack T is raised so that the upper surface of the corner block C comes into contact with the lower surface of the grating board B. The ascent is then automatically stopped. By stopping this rise, the grating board B can be released from the guide rail.

FIG. 9 illustrates the operating process of the paper flow prevention device A of the present invention. The explanation will be given below in sequence based on each figure.

Figure A shows a state in which printing papers P are stacked on a grating board B inserted into the upper surface of a corner block C, and then a paper stacking table T is lowered (a state in which a predetermined amount of printing paper is loaded on the previous grating board). ),
This figure shows the state in which the upper surface of corner block C is in contact with the lower surface of grating board B. In this state, the printing paper P is stacked one after another on the grating board B by the chain S with the gripper G, and the printing paper P is regulated by the paper stopper K and the paper alignment surface E of the suction wheel D, so that the paper flow Preventer A is not activated.

Figure B is the state shown in Figure A. Press the grating set button (not shown) to lower the paper stacking platform T, and the upper surface of the grating board B is further lowered to the position below the fulcrum pin, and the paper flow prevention device This shows a state where A has started moving. In this case, paper flow prevention device A
is moved inward, so that both ends of the slatted board B push up the paper presser board 4, and at the same time, the slatted board B is lowered as it is. At this time, the paper flow prevention device A contacts the printed paper P when at least the uppermost printed paper P is regulated by the paper stopper K and the paper aligning surface E of the suction wheel D.

Figure C shows that in the state shown in Figure B, the paper stacking table T is further lowered, and the top of the stacked printing papers P is at the position where the paper flow prevention device A is set (almost horizontal to the bottom surface of the grating board B). ) and then move to the next slat board B.
is inserted and the paper pressing plate 4 is in contact with the printing paper P stacked on the front grating board B.

Figure D shows a continuous process from Figure C, in which the paper stacking table T is further lowered, the paper holding plate 4 of the paper flow prevention device A is brought into complete contact with the printing paper P, and the paper stacking table T is This shows the state in which the upper printing paper P is neatly regulated.

Figure E shows the state in which the descent of the paper stack T has been stopped after Figure D, the paper flow prevention device A has been returned to its original position, and the corner block C has been erected on the slat board B. . In this state, the next grate board B is inserted, and the next step will be as shown in Figure A.

In this way, the operating steps of this device can be roughly divided into five steps shown in Figures A to E. Note that since this process is a series of continuous processes and is printed at a considerable speed, the operation condition is that each process operation is linked.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects.

A. The paper flow prevention operation, which was caused by conventional slat board operation, can be completely automated without manual intervention, and work efficiency can be improved.

B. The conventional slat board operating device and this device, the paper flow prevention device, are linked together, and can also be linked to the printing machine itself, allowing the operation of discharging printed paper onto the paper stacking table. The grating board operation and the paper flow regulation operation can be performed continuously and with good timing.

c) The structure and configuration of this device are not complicated, and installation is simple, so it is highly practical.

As described above, the paper flow prevention device according to the present invention is effective not only in terms of paper flow control performance but also in terms of workability and
It is possible to provide a device that is superior to conventional paper ejection mechanisms from all aspects such as operational and practical aspects.

[Brief explanation of drawings]

FIGS. 1 and 2 are schematic diagrams showing the entire mechanism and paper ejecting mechanism of a conventional sheet-fed printing press, and FIGS. 3 to 8 are schematic diagrams showing the paper flow prevention device of the present invention. FIG. 9 is an enlarged view of a portion of the present invention, and is a schematic explanatory diagram showing each step of the operation of the paper flow prevention device according to the present invention. 1... Auxiliary paper holding frame, 2, 3... Stay, 4... Paper holding plate, 6... Spring, 14...
...Shaft, 15, 24, 25...Gear, 16,
18, 19...Bearing, 17...Rack, 2
0... Guide plate, 22... Main body frame, A... Paper flow prevention device, B... Slatted board, n... Stopper switch, R... Drive unit, P... Printing paper, T...
...paper stacking stand.

Claims (1)

[Scope of Claims] 1. A guide plate having racks attached to the main frame on both sides, an auxiliary paper presser frame movably attached to the guide plate and integrally formed with a stay, and a spring attached to the stay. a paper presser plate that restricts the printed paper placed on the paper stacking table or the grating board, a stopper switch that detects when the printed paper comes into contact with the paper presser plate, and the auxiliary paper. a drive unit that drives a shaft attached to a presser frame and a gear that meshes with the rack; when the paper stacking platform is lowered by a predetermined amount, the paper presser plate moves inward to regulate the printed paper; A paper flow prevention device in a paper discharge mechanism of a sheet-fed printing press, characterized in that when the paper stacking table further descends by a predetermined amount after this regulation, the paper presser plate moves outward to release the regulation. 2. A paper flow prevention device in a paper discharge mechanism of a sheet-fed printing press according to claim 1, wherein the operation of the paper presser plate and the operation of the slatted plate are linked.