JPS59224348A - Register for sheet-fed press - Google Patents

Abstract

PURPOSE:To stop papers sent out to the upside of an insert plate by rightly contacting the paper with the front touch piece by providing an air port through which papers are sucked or floated, leading to an air source, in the rear side of a paper holder moving back and forth following the front touch piece for registering papers on the front end of the insert plate. CONSTITUTION:Papers 11 from a paper supplier are sent onto an insert plate 13, where a suction plate 22 is retracted, the front end of the papers is contacted with a paper touch piece 23. At the same time, the suction plate 22 begins to go forward by rotation of an arm shaft 20, air is sucked through a suction port 28 by switching a switch valve 26, paper 11 is adsorbed and advanced with slow speeds, the front end of paper is contacted with the front touch piece 26 and advanced, and the paper 11 is slipped and registered at the front touch piece. When the advancement of the suction plate 22 is ended, the paper 11 is grasped by the claw of a swing device and fed to the printer. During the feeding period, the suction plate 22 begins to retract, but the valve 26 is switched and air is blown out from the suction port 28 to float the paper 11. Therefore, even when paper is curled, register arrangement can be exactly made to prevent failure of registering.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a registration device that regulates the position of paper fed onto an interfering plate by a sheet feeding device in a sheet-fed printing press to align printing registration.

[Prior art]

In the printing process using a printing machine, η(
The loaded papers are sucked one by one from the upper layer by the sucker of the paper feeding device, and moved forward by the swinging of the sucker, where they are caught by the upper and lower paper feed rollers and fed out by their rotation. The paper is conveyed on the feeder board by a paper feeding tape and delivered onto the differential plate. FIG. 1 is a cross-sectional view of the front end of the difference plate, and the difference plate 1 has a plurality of notches 2 arranged in parallel in the width direction, and each cut 2 has an L-shaped upper end. The bent rakes 3 are respectively engaged. This rake 3 is configured to reciprocate between a solid line position indicated by reference numeral 3 and a chain line position indicated by reference numeral 3A in the figure. Further, in a plurality of other notches provided at different phases in the width direction from the notch 2, a front cover 4 whose upper end is similarly bent into an L-shape is provided so as to be able to swing freely around the lower end. It is being Then, when the advancing rake 3 reaches the midway position indicated by the symbol 3B, the paper 5 fed onto the difference plate 1 catches up with the rake 3.
B, and after this, the rake moves at a speed reduced to the same speed as the rake 3, and then comes into contact with the front support 4, so that the vertical register is aligned. Then, at the same time as the front cover 4 swings and escapes from the paper 5, a swing device (not shown) swings and grips the edge of the paper with its claws, transports it to the impression cylinder of the printing unit, and replaces it with its claws. let

While the swing device is transporting the boat 5, the front cover 4 and the rake 3 return to their original positions and repeat the same action on the next sheet 5.

However, in conventional registration devices like this,
In order to stop the receiving of the paper 5, the rake 3 also protruded upwards from the plate 1, so when the rake 3 moves forward and then retreats to receive the next paper 5, the lower surface of the paper 5 being conveyed by the swing device If the front edge of the paper 5 is curled upwards, it will cross over the rake 3. Unfortunately, it wasn't caught in advance, which caused another major printing problem.

[Summary of the invention]

Tree climbing 1. It was created in consideration of the above points, and the front end of the difference plate follows the register alignment front stopper in the front-rear direction.
By providing an air hole for paper suction and flotation that communicates with an air source at the rear of the paper pad that advances and retreats one step, it is possible to stop the paper being sent onto the differential plate by correctly hitting the front pad. The present invention provides a registration device for a sheet-fed printing press that prevents conveyed paper from being soiled by a swing device. Embodiments of the present invention will be described in detail below with reference to the drawings.

〔Example〕

2 to 4 show an embodiment of the registration device according to the present invention, FIG. 2 is a side sectional view thereof, FIG. 3 is a sectional view taken along line AA in FIG. 2, and FIG. 4 is a pneumatic circuit diagram. . In the figure, there is an arrow B in front of the paper feed roller (not shown) of the paper feeder.
A feeder board 12, which is slightly wider than the paper 11 that is fed in the direction indicated by , is installed at a slight incline so that it becomes lower toward the front end, and in front of it is a difference board 13 that is approximately the same width as the feeder board 12. It is joined. A plurality of notches 14 are provided in the front end of the difference plate 13 in parallel in the width direction of the paper. A front piece 16 is engaged with the notch 14 so as to swing back and forth. Similarly, difference plate 1
3 has a plurality of other notches 1 having an arcuate surface.
The T's are arranged parallel to each other in a different phase from the notches 14 in the width direction of the paper, and a hollow bracket 18 having an arcuate surface at the upper end is inserted into the center of each notch 17 in the depth direction.
is fixed to the back surface of the difference plate 13. An arm shaft 20 extending in the width direction of the paper is rotatably provided below the bracket 18 and is rotatably supported by the left and right frames. It is configured to reciprocate by a certain angle in the forward and reverse directions. The reference numeral 21 is fixed to the arm shaft 20 corresponding to each notch 17, and its rotation causes an arrow C in the figure.
As shown, the arm swings, and its upper end faces the vicinity of the notch 17, and a suction plate 22 is fixed to this upper end with a set screw 23. Suction plate 22
is formed in a cross-sectional shape having a circular arc member, and is configured to move back and forth in the front and back directions with respect to the cut 17° by making the back surface of the circular arc member slide into contact with the upper end circular surface of the bracket 1B by swinging the arm 21. has been done. The arcuate surface of the cut 1T is formed along the arcuate surface of the mouthpiece plate 220. A paper pad 23, which abuts the front end of the paper 11, is fixed to the front end of the suction plate 22 at a height such that it slightly protrudes from the difference plate 13 at the most retracted position of the suction plate 22, as shown in the figure. There is.

Therefore, the suction and floating structure of the paper 11 by the suction plate 22 will be explained. The bracket 18 is provided with a hose port 24 that communicates with the hollow portion thereof.
4 is connected to a motorized blower 27 as an air source via a rotary valve 26. In addition, the arc member of the mouthpiece plate 22 has two or more pieces each.
A row of suction ports 28 are opened in parallel behind the paper pad 23. The rotary valve 26 is equipped with a camshaft 30 that is driven from the motor 29 side of the printing press and rotates once every time one sheet of paper 11 is fed. On this camshaft 30 is a cam 31 that opens and closes the main valve. and three switching valves R1,
Cams 32, 33, and 34 are provided to open and close R2 and R3, respectively. Then, when the suction plate 22 is at its most retracted position as shown in FIG. 2, the main valve opens and the switching valves Rt and R21R3 are switched to the opposite position from the position shown in FIG. 4, sucking air from the suction port 2B and switching. Pulp R
The suction plate 22 moves forward while discharging air from the air outlet 2 to the atmosphere. When the suction plate 22 is moved backward from the most advanced position, the switching valves Rt, R2, and R3 are switched to the positions shown in FIG.

The operation of the registration device configured as above will be explained. The paper 11 is sucked one by one by the sucker of the paper feeding device and then caught by the paper feed roller and sent out. The paper 11 is held from above and below by the paper feed υ tape and the paper feed roller and is conveyed on the feeder board 12. , and sent to the differential plate 13''d. At this time, the suction plate 22 has retreated to the position shown in FIG. 2, and the front end of the paper 11 comes into contact with the paper pad 23. At the same time, the arm shaft 20 rotates and the suction plate 22 begins to move forward. At the same time as forward movement, the main valve of the rotary valve 26 opens, and the switching pulp R4, R
2. Since R3 is switched from the position shown in FIG.
It is attracted to the arc surface. Since the forward speed of the suction plate 22 is slower than the feeding speed of the paper 11, the paper 11 is absorbed by the suction plate 2.
2 and moves forward while being decelerated. In this case, since the paper 11 is attracted, it is difficult to climb over the paper support 23. The front end 16 is standing in the forward path of the suction plate 22 and is out of phase with the paper support 23 in the paper width direction.
2 continues moving forward, leaving paper 11 behind.

Therefore, the paper 11 and the suction plate 22 slip, and the suction resistance at this time acts as a force that presses the end of the paper against the front cover 16, so that the paper 11 is regulated by the front cover 16 and aligned. When the suction plate 22 has finished moving forward, a swing device (not shown) that is out of phase with the front plate 16 in the paper width direction swings, grips the paper 11 with its claws, and transports it toward the impression cylinder of the printing device. do. While the whetstone 11 is being conveyed by the swing device, the front cover 16 escapes from the paper 11 by rotation of the front cover shaft 15, and immediately returns to the upright position after passing through the swing device. At the same time, the suction plate 22 begins to retreat, and at this time the switching nozzles R1, R2, R3 are switched to the positions shown in FIG. At this time of retreat, the latter half of the sheet 11 being conveyed by the swing device is still passing over the difference plate 13, but since air is blown out from the suction port 28, the paper 11 floats up, and the paper pad 23 moves onto the difference plate 13. I often touch this even if it sticks out from the outside. One cycle ends when the suction plate 22 is retracted and the main valve is closed.

In addition, in this embodiment, the bracket 1B is connected to the differential plate 13.
In the above example, the bracket 18 is fixed to the side of the arm 21 and the suction port plate 22 is slid on the arcuate surface of the hose. Arm 21 with mouthpiece plate 22 with 25 attached.
It may also be moved forward and backward by swinging. In addition, switching valves R1 and R2
, R3 are provided to communicate with the atmosphere so that the air flow does not stop when air is not needed. If provided separately, there is no need to switch to the atmosphere.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in the registration device of a sheet-fed printing press, air is provided at the rear of the paper pad that moves back and forth in the front and back directions following the registration front pad at the front end of the difference plate. Suction of paper communicating with source.

By providing air holes for floating, the paper until it hits the front pad is attracted and does not float up from the difference plate, so even if the front edge of the paper is curled upwards, it is difficult to get over the paper pad or the penalty point. The performance of the registration device is improved because the paper can be stopped by the front support, and the paper can be pressed against the front support by bringing the paper into contact with the front support instead of adsorbing it with air. In addition, since the paper is forcibly bent, the registration accuracy is improved. In addition, due to the deceleration effect caused by the adsorption of the paper, the rebound υ of one paper from the front cover is eliminated, and misregistration can be prevented.

Furthermore, since the paper is picked up by a swing device and then air is blown to float the conveyed paper, there is no chance of the paper coming into contact with the front cover or paper cover, and the quality of the printed matter is improved because the paper is free from stains and damage.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the front end of the differential plate in a conventional registration device.
2 to 4 show an embodiment of the registration device for a sheet-fed printing press according to the present invention, FIG. 2 is a side sectional view thereof, FIG. 3 is a sectional view taken along line AA in FIG. 2, and FIG. It is a pneumatic circuit diagram. 11-＠＠-paper, 13＠... insert plate, 16... front face, 18... bracket, 20....・・Arm 1II111.21・Fist・・Arm, 22・
・・Fist suction plate, 23・・Paper pad, 25・Bone・・Hose, 2T119・・Blower, 28・・・・Suction port. Patent applicant: Komori Printing Machinery Co., Ltd. Agent: Masaki Yamakawa (and one other person)

Claims (1)

[Claims] Behind the front end of the front end of the difference plate for paper register alignment, which moves back and forth in the front and rear directions, a paper contact member is installed that follows the front end, advances and retreats, and brings the paper into contact with the front end to decelerate the paper in the width direction of the paper. A paper suction/floating air hole is provided in a member that supports the paper support member and extends rearward, and communicates with an air source via a hollow chamber and an air passage. Registration device for sheet-fed printing presses.