JPH0527388Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a sheet-fed printing machine that extracts and discharges a printing sample from paper that is conveyed after printing and discharged onto a stacking device. This relates to a paper ejecting device.

[Conventional technology]

In a sheet-fed printing press, the paper printed by the printing unit is conveyed while being gripped by the claws of the paper ejection chain, and then released from the claws at the end of the conveyance, and falls onto a paper stacking device to be stacked. In such printing operations, it is necessary for the operator to check from time to time whether the ink, water concentration, etc. of the discharged printed matter are appropriate and whether defective printing has been performed. Conventionally, a paper receiver is provided and the paper is quickly advanced and retreated horizontally into the discharge paper fall path, and one to three sheets of paper are taken out and compared with a regular print sample.

However, in such a device, when moving the paper tray back and forth, it not only touches the printing paper and stains the printing surface, or disturbs the alignment of the already stacked paper, but also requires the operator to constantly eject paper. Work efficiency was poor because the staff had to be located in the paper department.

Therefore, as shown in Japanese Unexamined Patent Application Publication No. 58-47749, the present applicant provided another paper ejection receiver behind the regular paper stacking table and released the paper ejection claw by swinging a cam. We proposed a device that selectively switches the position between above the paper stacking table and above the paper ejection tray.

[Problem that the invention attempts to solve]

However, such a device of the prior application is suitable for a model that takes out stacked sheets in a direction perpendicular to the discharge paper conveyance direction, but it is suitable for a model that takes out stacked papers in a direction perpendicular to the discharge paper conveyance direction. The problem with this was that the print sample paper holder protruded in the removal direction, making it difficult to work with. In addition, if the printing speed is slow, the paper does not reach the paper tray because the running inertia of the paper is small, and the subsequent paper ejection claw, which rotates as the paper ejection chain runs, winds up the print sample being ejected. Something happened.

The present invention was developed in view of the above points, and is a sheet-fed printing machine that enables smooth ejection of printed samples regardless of the printing speed without interfering with the removal of the loaded paper to the rear of the machine. The purpose of the present invention is to provide a print sample discharge device.

[Means for solving problems]

In order to achieve this purpose, the present invention has a paper ejection tray located downstream of the paper ejection transport of the print sample suction transfer device, which is provided below the position where the print sample is released from the grip of the paper ejection claw. The suction transfer device is provided with a suction box provided with pulleys on the upper and downstream sides of the paper discharge conveyance, a suction box disposed between these two pulleys and having a suction surface having a large number of suction holes, and the suction transfer device. The belt is stretched between both pulleys, runs in almost sliding contact with the suction surface of the suction box, and has a large number of suction holes. An air source was connected to the compressor, and an air outlet was provided on the circumference of this pulley.

[Effect]

The print sample released from the grip of the paper ejection claw is transported while being sucked by a belt that runs almost in sliding contact with the suction box, and the print sample is ejected onto the paper ejection tray via the downstream pulley of the paper ejection transport. be done. During this discharge, the print sample may mistakenly come into close contact with the circumferential surface of the downstream pulley, but with this device, the air ejected from the air outlet is blown onto the print sample, so the print sample is It is not peeled off from the circumferential surface of the pulley and cannot be rolled up.

〔Example〕

1 to 4 show an embodiment of the print sample discharge device according to the present invention, FIG. 1 is a side view thereof, and FIG.
The figure is a partially cutaway plan view, FIG. 3 is a side view of the air blower, and FIG. 4 is a partially cutaway plan view. Between a pair of left and right sprockets provided on the printing device (not shown) and a pair of left and right sprockets 3 pivotally attached to a sprocket shaft 2 of a paper discharge device 1, there is a sprocket that runs in the direction shown by arrow A in the figure. The paper chains 4 are stretched respectively, and on each claw pole (not shown) consisting of a plurality of claw shafts and claw base shafts supported at regular intervals between the left and right paper ejection chains 4, there are paper chains 4 that are arranged opposite to each other. A plurality of sets of paper discharge claws 5 (hereinafter abbreviated as claws 5) each consisting of a claw and a claw base are arranged in parallel. The pawl 5 holds the paper 6 between the pawl and the pawl base and conveys it by running the paper discharge chain 4, and also applies the cam follower on the pawl 5 side to the pawl opening cam 7 provided at the end of conveyance. By touching the claw 5
is configured to open and release the paper 6 from the grip. Then, the cam 7 is moved, for example, to the position shown by the chain line 7A by the operation of a paper discharge position adjusting device (not shown) attached thereto, and the claw 5, which had been opened at the position shown by the reference numeral 5, is moved to the position shown by the chain line 7A. is code 5
It is configured to be adjusted so that it opens at the position indicated by A. Reference numeral 8 denotes a paper stacking table which is disposed so as to be movable up and down below the conveyance end of the paper ejection chain 4, and the regular paper 6 released from the grip of the claw 5 at the position indicated by the reference numeral 5 is falling. , so that the leading edge of the paper is brought into contact with the paper rest 9 to align the edges of the paper, and then the paper is stacked on the paper stacking table 8.

The movement of the cam 7 to the position indicated by the symbol 7A is as follows:
This is done when collecting the above-mentioned print sample, and the claw 5A opened at the position indicated by the reference numeral 5A is configured to grip the print sample 6A, release it, and eject the paper onto a paper ejection tray, which will be described below. has been done. That is, in the left and right paper discharge frames 10 that pivotally support the sprocket shaft 2, a drive shaft 12 of a suction and transfer device, generally designated by the reference numeral 11, is drivingly connected to a driving side on the outside of the paper discharge frame 10 and is rotatable. A support shaft 13 is fixed to the left and right paper ejection frames 10 at a slightly higher position in front of the drive shaft 12, and is rotated clockwise in FIG. has been done. Reference numeral 14 denotes a plurality of oval shaped plates supported by both shafts 12 and 13 and arranged in parallel in the axial direction, which are fixed to the support shaft 13 and loosely mounted on the drive shaft 12. A box-shaped ventilation box 15 having an inverted trapezoidal shape when viewed from the side and opening upward is fixed to this plate 14 with bolts 16, and is fixed to both shafts 12,
Pulleys 17 and 18 are provided on both shafts 12 and 13, respectively, with the intake box 15 sandwiched therebetween. Of these, the pulley 17 is fixed to the drive shaft 12, and the pulley 18 is fixed to the support shaft 13.
A belt 19 having a large number of suction holes 19a is stretched between both pulleys 17 and 18. The suction hole 19a of the belt 19 that circulates due to the rotation of the pulley 17 by the drive shaft 12 is communicated with the inside of the intake box 15, and the circumferential surface of the pulley 18 has an annular air passage 18a that communicates with the suction hole 19a. is provided. The inside of the ventilation box 15 and the intake side of an air source (not shown) are connected to an intake port 14a provided on the plate 14 via an air hose or the like, and also to an outlet port 1 provided on the plate 14.
4b communicates with the air passage 18a, and
It is connected to the exhaust side of the air source via the air hole 2 and the like. Then, by rotating the pulley 18 and activating the air source, the suction hole 19 of the belt 19 is
The air sucked in from a is directed to the air source through the inside of the intake box 15, the intake port 14a, the air hose, etc.
In addition, the air from the air source is connected to the air hose etc. and the discharge port 1.
4b and the air passage 18a, the air is blown out from the pulley 18 side suction hole 19a of the belt 19. Further, above the rotating belt 19, an air blowing plate 20 as a component of the suction transfer device 11 is arranged. That is, the support shaft 13
Above, a hollow air pipe 21 connected to the exhaust port of the front air source is supported between the left and right paper discharge frames 10, and an air blowing plate 20 formed in an elongated rectangular shape is connected to the base end. A fixing portion 20a is fixed to the air pipe 21 by tightening. The air blowing plate 20 includes a hollow portion 20c that communicates with the air pipe 21 through an air passage 20b.
A large number of air blow holes 20d are opened toward the belt 19 at c. The air blowing plate 20 and the belt 19 are disposed opposite to each other and out of phase with the pawl 5 in the machine width direction. With this configuration, the print sample 6A released from the grip of the nail at the position 5A is pressed onto the belt 19 by suction from the suction hole 19a and air blowing from the air blow hole 20d. The air is transferred along with the periphery of the belt 19, and is released from the belt 19 by air blown out from the suction hole 19a at the end of the transfer.

From the support shaft 13, which is the transfer terminal end of the suction transfer device 11 configured in this way, a paper ejection receiver, generally designated by the reference numeral 22, projects forward. The paper ejection receiver 22 is located adjacent to the paper ejection frame 10 on the support shaft 1.
3, a pair of left and right support tubes 22a each having a boss at the base end thereof, and a stay 22b connecting the base ends of the support tubes 22a;
A plurality of support tubes 22c protrude between and parallel to the support tubes 22a on both sides, and all the support tubes 22
The support part is formed into a frame with a stay 22d that connects the intermediate parts of the support tubes 22a and 22c.
A vertical bar 22f whose tip end is connected by a horizontal bar 22e is fitted into 22c so as to be movable forward and backward. The paper ejection receiver 22 configured in this manner is used during paper ejection work.
As shown by the chain line in FIG. 1, the stopper 23 is inclined and protrudes forward so that the distal end is higher than the proximal end, and is protruded from the left and right paper ejection frames 10.
downward rotation is regulated by. Also, during paper ejection work, the vertical bar 22f is connected to the support tube 22a,
It is pulled out from 22c. Then, after the printing work is finished, the paper ejection receiver 22 pushes the vertical bar 22f into the support tubes 22a, 22c and stores it therein.
It is configured to be stored by standing up as shown by the solid line in the figure, and to be fixed by adsorption to the magnet 24.

The paper discharging operation of the print sample discharging device configured as above will be explained. During normal printing work, cam 7
is at the position shown by the solid line in FIG. 5 is released from its grip, and the discharged sheets are stacked on the paper stacking table 8.

When collecting a print sample 6A during printing work, the cam 7 is moved to the position indicated by the chain line 7A by cylinder operation using a push button or the like.
The pawl 5, which rotates as the paper discharge chain 4 travels, opens at a position 5A to release the print sample 6A from the grip. The released printing sample 6A is captured at its tip by the air blowing plate 20 and the running belt 19, and is sucked from the suction hole 19a and air blowing hole 20d.
The paper is crimped onto the surface of the belt 19 by blowing air from the machine and transferred. The transferred print sample 6A is sent onto the paper ejection tray 22, but at this time, the pulley 18
Since air is blown out from the suction hole 19a of the belt 19 attached to the belt 1, the print sample 6A is
The paper is ejected without wrapping around the paper.

Note that, depending on the settings of the control circuit, for example, as long as the push button is kept pressed, any number of print samples can be ejected onto the paper ejection tray in succession, or the counter can be used to It is also possible to eject a printing sample every time a certain number of sheets of paper are ejected.

[Effect of idea]

As is clear from the above explanation, according to the present invention, in the print sample delivery device of a sheet-fed printing press, the print sample suction transfer device provided below the position where the print sample is gripped and released by the paper delivery claw is ejected. A paper ejection receiver is provided protrudingly on the downstream side of the paper transport so that its tip is not lower than the horizontal position, and the suction and feeding device is arranged between pulleys on the upper and downstream sides of the paper ejection transport and between these two pulleys. A suction box with a suction surface having suction holes of The print sample released from the grip is placed on the suction transfer device and is suctioned and forcibly transferred to the paper output tray, so even if the printing speed is slow, the print sample will surely reach the paper output tray and be ejected. The paper is rolled up and the following paper is not rolled up. Also,
Since the paper ejection receiver is located above the stacked papers on the paper stacking table, it does not interfere with the transportation of the stacked papers, improving work efficiency. Furthermore, of the two pulleys, the pulley on the downstream side of paper discharge transfer is formed into a hollow shape, a compressed air source is connected inside the pulley, and an air jet hole is provided on the circumferential surface of this pulley, so that the paper is discharged through this pulley. Since the print sample discharged onto the paper receiver is blown with air from the blow-off hole, the print sample that accidentally clings to the circumferential surface of the downstream pulley and tries to get caught up in it is peeled off from the circumferential surface of the pulley. Therefore, the paper is not caught in the pulley and the paper is ejected smoothly.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the print sample discharge device for a sheet-fed printing press according to the present invention, FIG. 1 is a side view thereof, and FIG. 2 is a partially cutaway exploded plan view thereof. , FIG. 3 is a side view of the air blower, and FIG. 4 is a partially cutaway plan view. 5, 5A... Paper ejection claw, 6A... Printing sample, 17,
18...pulley, 19...belt, 19a...suction hole, 22...paper discharge tray.

Claims (1)

[Scope of utility model registration request] In a print sample discharge device of a sheet-fed printing press that discharges a print sample released from the grip of a paper discharge claw that opens downstream of the normal grip release position onto a paper discharge tray,
A suction transfer device that moves while sucking the print sample and transfers the print sample is provided below the grip release position of the print sample, and the paper discharge tray is placed horizontally on the downstream side of the suction transfer device for paper discharge transfer. The suction transfer device is provided with a protrusion so that the tip portion is not lower than the posture, and the suction transfer device is provided with pulleys on the upper and downstream sides of paper ejection conveyance, and a suction surface disposed between these pulleys and having a large number of suction holes. A belt that is stretched between the two pulleys, runs in almost sliding contact with the suction surface of the suction box, and has a large number of suction holes. The downstream pulley is formed into a hollow shape, and a compressed air source is connected to the inside of the pulley, and an air jet hole is provided on the circumferential surface of this pulley to blow air onto the print sample and peel off the print sample that is about to be wrapped around this pulley. A print sample discharge device for a sheet-fed printing press.