JPH0628528Y2 - Paper release cam adjustment device for sheet-fed printing press - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a release timing of a paper release cam for releasing a paper carried by a nail of a paper ejection chain from a jaw of a sheet-fed printing press. The present invention relates to a paper release cam adjusting device that adjusts the paper size according to the paper size, the transport speed, and the like.

[Conventional technology]

Generally, the sheet ejection device of a sheet-fed printing press is provided with a sheet ejection chain for conveying the printed sheet and a sheet stacker for stacking the conveyed sheet. Among these, the sheet ejection chain is a left and right chain and a space between them. A plurality of sets of claw shafts and claw base shafts that are supported at regular intervals, and the plurality of claws and the claw base that compose the gripper device are provided on each claw shaft and the claw base shaft. Are parallel to each other in the axial direction. After printing, the paper gripped by the gripper device (hereinafter referred to as the nail) of the paper ejection chain is conveyed by the traveling of the paper ejection chain and released from the gripping of the pawl above the paper stacking table. After it has dropped, it is stacked on a paper tray via a plate or the like.

In such a paper discharge device, a paper release cam for opening a claw to release the paper from the grip is conventionally attached to a support member of a sprocket at the end of conveyance, which generally stretches a paper discharge chain. The pawl is configured to be opened by bringing the roller of the cam lever on the pawl shaft into contact with the facing cam surface. If the paper release timing by opening the claws is not appropriate, the paper will not be loaded in an orderly manner due to the contact position and contact timing where the tip of the falling paper is abutted to regulate the position. By adjusting the paper release cam in the paper transport direction according to the thickness, printing speed, etc., the proper paper release timing is obtained.

[Problems to be solved by the invention]

However, this type of paper release cam adjusting device in the related art fixes the paper release cam and its fixing member by engaging the slot and the bolt, and loosens the bolt to move the paper release cam. Since the paper release timing is adjusted, not only the workability is extremely poor, but also the machine has to be stopped and adjusted. There is a problem that it takes a long time to do so and the amount of waste paper generated during that time increases. In particular, for example, as in a banknote printing machine or the like, in the case where two or three sets of paper discharging devices including a paper stacking table, a paper releasing cam, and the like are provided in the paper transporting path of the paper discharging chain, the above problem is further reduced. It was doubled and tripled.

[Means for solving problems]

In order to solve such a problem, in the present invention, in a sheet-fed printing press having a plurality of sets of paper discharge devices, a paper transport direction in which a working end of a piston rod is fixed to a paper release cam of each paper discharge device. A plurality of fluid pressure cylinders having an axis parallel to the above are provided, and the striker is fixed to each piston rod.
Each striker has a striker contact stopper that can be adjusted in the same amount at the same time by manual operation in the retract path.

[Action]

For example, when there are three sets of paper discharge devices, when the paper is conveyed with the first piston rod retracted from the paper discharge upstream side,
The first paper release cam opens the pawl and the paper is ejected to the first paper ejection device. If paper is conveyed with the first piston rod moved forward and the second piston rod retracted, 2
The paper is ejected to the second paper ejection device. Further, when the first and second piston rods are advanced to convey the paper, the paper is ejected to the third paper ejection device. When all the stoppers are simultaneously moved by manual operation, the retract limit positions of the piston rods are simultaneously changed by the same amount, and the paper release timing is adjusted by the same amount.

〔Example〕

1 and 2 show an example in which the present invention is applied to a sheet-fed printing press having three sets of paper ejecting devices, and FIG. 1 shows a paper releasing device in a central paper ejecting device of the three sets. 2 is a partially cutaway plan view of FIG. In these figures,
A pair of left and right paper ejection chains 2 running in the direction indicated by arrow A in the figure are stretched between the left and right paper ejection frames 1 extending in the front-rear direction. The paper ejection chains 2 are folded back by a sprocket (not shown). Drive to the left at the top of Fig. 1. A plurality of pairs of claw rods composed of a rotatable claw shaft 3 and a claw base shaft 4 are supported at fixed intervals between the left and right paper discharge chains 2, and on each claw shaft 3 and each claw base shaft 4. On the upper side, a plurality of claws 5 and a claw base 6 are arranged in parallel so as to face each other. The gripping device 7 composed of such a claw 5 and a claw base 6 is of a spring-close type, and is structured so that the claw 5 is closed to the claw base 6 by a spring (not shown) and the paper 8 is clamped. ing. Further, a cam follower 10 is pivotally attached to a free end portion of a roller lever 9 fixed to the pawl shaft 3, and the cam follower 10 is pushed down by a mountain portion 20a of a paper releasing cam 20 which will be described later, so that the cam lever 9 is moved. The pawl 5 is opened by rotating counterclockwise in FIG. 1 and the paper 8 is released from the grip. The pawl 5 is opened and closed by a cam provided on the frame side of a printing unit (not shown) to hold the paper 8, and then the paper discharge chain 2 travels to carry it to this point.

Therefore, a paper release device for opening the claw 5 to release the paper 8 from the grip will be described. Outside the frame 1, a guide plate 1 formed in a horizontally long rectangular shape and parallel to the frame 1 is provided.
1 is supported and provided by four studs 12 planted in the frame 1. This guide plate 11 is provided with a guide groove 13 that is linear and has only a front end portion in an upward arc shape. ing. On the other hand, behind the guide plate 11, an air cylinder 14 as a fluid pressure cylinder having an axis parallel to the paper transport direction is pivotally supported by a stud 15 planted in the frame 1 and is provided with a solenoid valve. It is connected via an air source (not shown). A metal fitting 1 screwed into the threaded portion of the working end of the piston rod 16 that moves forward and backward as the solenoid valve opens and closes.
A roller 18 engaging with the groove 13 is pivotally attached to the pin 7 by a pin 19 so that the roller 18 rolls along the groove 13 as the piston rod 16 moves back and forth. 20
Is a paper releasing cam integrally fixed to the rollers 18 and 24 by the pin 19 and the pins 21 and nuts 22 and 23 provided in front of the pin 19, and the upper surface thereof is formed into a plate-like shape. The lower surface thereof has a mountain portion 20a which is an arcuate cam surface which becomes higher along the forward direction. With this structure, when the gripping device 7 holding the paper 8 runs and the cam follower 10 releases the paper and goes up the slope of the cam 20 toward the mountain portion 20a, the pawl 5 springs. It opens against the force of force and releases the paper 8 from the grip. Reference numeral 8A denotes a paper sheet that has been released from the grip of the nail 5 and dropped and stacked on a paper stacking board (not shown), and 25 is a pad for abutting and aligning the leading ends of the falling paper sheets 8A.

In the present embodiment, the sheet discharge device 26 configured as described above is the same as that shown in the figure, and is arranged on the left and right sides thereof along the traveling path of the sheet discharge chain 2. Then, for example, when the piston rod 16 of the second air cylinder 14 shown in the drawing and the first air cylinder not shown in the drawing moves forward from the position shown in the drawing, and the roller 24 rises along the arc portion of the groove 13, the paper releasing cam 20 moves. The pin 19 pivots counterclockwise in FIG. 1 and the mountain portion 20a escapes from the paper ejection chain 2, so that the pawl 5 does not open and passes through the first and second paper ejection devices. The paper 8 is discharged by the action of the paper releasing cam in the third paper discharging device. It should be noted that in this embodiment, a sheet discharge device for sampling having a sheet discharge cam having no air cylinder is provided on the downstream side of the third sheet discharge device, and the sheet discharge cam of the third sheet discharge device is provided. Is advanced to delay the paper release phase, the paper passes through the third paper ejection device and is ejected to the sampling paper ejection tray.

Further, this apparatus is provided with a device for simultaneously moving and adjusting all the paper releasing cams in the paper carrying direction, and the configuration thereof will be described below. That is, the striker 27 is fixed to the piston rod 16 of each air cylinder 14, and the stopper 2 is also mounted on the piston rod 16.
8 is located closer to the cylinder of the air cylinder 14 than the striker 27, and is mounted to be movable in the axial direction. Two
Reference numeral 9 denotes a guide bracket which is bolted to the frame 1 and is provided so as to project inwardly, and the finished flat surface of the stopper 28 is brought into sliding contact with the plane thereof to restrict the rotation of the stopper 28. A line shaft 30 extends between the first paper discharge device and the third paper discharge device and is rotatably supported by a bearing 31 on the frame 1 side. Threaded parts 30a that are connected and provided at the three locations
Are screwed into screw holes formed in each stopper 28. On the other hand, in the shaft hole 1a of the frame 1, an operation shaft 35, to which a bevel gear 33 on the line shaft 30 and a meshing bevel gear 34 are attached, is restricted from moving in the axial direction by a collar 36 and is rotated via a bush 37. It is rotatably supported, and a handle 39 is pivotally attached to the protruding portion from the out cover 38. When the operation shaft 35 is rotated by the handle 37, the line shaft 30 is rotated through the meshing of the bevel gears 33 and 34, and the three stoppers 28 screwed with the screw portion 30a are simultaneously moved in the axial direction. The striker 27 is brought into contact with this so that the backward limit of the piston rod 16 is restricted and the phases of the three paper releasing cams 20 in the paper conveying direction are adjusted at the same time.

The operation of the paper discharge device configured as described above will be described. Now, for example, when the piston rod 16 of the first paper discharging device is advanced, the paper releasing cam 20 is rotated counterclockwise about the pin 19 by the action of the roller 24 and the arc portion of the groove 13 and is in the non-operating state. become. Then, when the printing cam is started with the paper releasing cam 20 of the second paper discharging device 26 in the operating state shown in the figure, the paper is held by the pawls 5 by the traveling of the paper discharging chain 2 and conveyed through the first paper discharging device. The released paper 8 is released from the grip of the pawl 5 by the cam follower 10 coming into contact with the mountain portion 20a of the paper releasing cam 20 and the pawl 5 being opened, and falls.
In 5 the paper ends are aligned and stacked as paper 8A on the paper stacking table.

When a predetermined amount of paper 8A is loaded on the paper loading tray of the second paper discharging device 26, the piston rod 1 of the second air cylinder 14 is loaded.
6 advances, and the paper releasing cam 20 becomes inoperative in the same manner as described above. Therefore, the paper 8 held by the pawl 5 and conveyed is the second paper ejecting device because the pawl 5 does not open. And is discharged to the third sheet discharging device. In this way, the printing operation is continued while ejecting the paper by sequentially using the three sets of paper ejection devices. If it is desired to sample the printing paper during the printing operation, the paper discharging cam 20 of the third paper discharging device is advanced to shift the paper discharging phase forward, and the conveyed paper 8 receives the sampling discharging paper receiver. The paper can be removed for sampling because it is ejected to.

When the paper size, the paper thickness, the printing speed, etc. are changed, the handle shaft 39 is gripped and the operation shaft 35 is rotated to move the line shaft 30 due to the engagement of the bevel gears 33 and 34, and the screw portion 30a. The stoppers 38 that are screwed together move while slidingly contacting the plane of the guide bracket 29, and their positions change at any time. Therefore, the retreat limit of the piston rod 16 that is retracted to bring the paper releasing cam 20 into the operating state is adjusted, and the paper releasing timing by the paper releasing cam 20 is advanced or delayed by the same amount in the three paper discharging devices 26. To do. The paper release timing can be adjusted while observing the paper discharge behavior during the operation of the machine.

If the paper discharge unit for sampling is not provided, 3
It is not necessary to provide the air cylinder 14 in the second paper discharging device, and for example, the paper releasing cam 20 may be a spring member or the like for the stopper 28.
All you have to do is press it against. In addition, this embodiment shows an example in which three sets of paper discharge devices are provided, but any number of sets may be used as long as there are two or more sets.

[Effect of device]

As is apparent from the above description, according to the present invention, in a sheet-fed printing press having a plurality of sets of paper discharge devices, the paper transport direction in which the working end of the piston rod is fixed to the paper release cam of each paper discharge device A plurality of fluid pressure cylinders with parallel axes are provided to fix the striker to each piston rod, and striker contact stoppers that can be adjusted in the same amount by manual operation in the retract path of each striker. By providing it, the paper release timings of multiple paper release cams can be adjusted at the same time by a simple manual operation, so that the operability and the paper alignment performance are significantly improved, and while the machine is in operation. Since it is possible to make adjustments while observing the discharge behavior, it is possible to make appropriate adjustments, further improve the paper alignment performance, and reduce the amount of waste paper generated during adjustment.

[Brief description of drawings]

FIGS. 1 and 2 show an embodiment of a paper ejection cam adjusting device of a sheet-fed printing press according to the present invention, and FIG. 1 shows paper ejection in a central paper ejection device of three sets of paper ejection devices. A side view of the apparatus and FIG. 2 are partially cutaway plan views. 5 ... claws, 10 ... cam followers, 11 ... guide plates, 1
3 ... Groove, 14 ... Air cylinder, 16 ... Piston rod, 20 ... Paper release cam, 20a ... Mountain part, 26 ... Paper ejecting device, 27 ... Striker, 28 ... Stopper, 30 ...
Line shaft, 30a ... Screw part, 33,34 ... Bevel gear, 35 ... Operation shaft, 39 ... Handle.

Claims (1)

[Scope of utility model registration request] 1. A paper releasing cam for opening a paper ejecting claw by a cam action of a lower cam surface, and a guide member for adjusting the paper releasing timing and stopping the paper releasing operation by moving the cam in the paper conveying direction. In a sheet-fed printing press having a plurality of sets of paper ejection devices arranged in parallel in the paper conveyance direction, a piston rod of a fluid pressure cylinder having an axis parallel to the paper conveyance direction in a paper release cam of each paper ejection device. The striker is fixed on each piston rod, and the movement of the piston rod is regulated by abutting against the striker by adjusting the movement of the striker in the retracted path of each striker all at once and by the same amount. A paper release cam adjusting device for a sheet-fed printing press, which is provided with respective stoppers.