JP2526073Y2 - Pre-contact operation mechanism of metal plate printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a sheet-fed rotary printing press for printing metal sheets.
The front end of the metal plate supplied one by one is brought into contact between the printing cylinder and the impression cylinder, and is supported in the rotation axis direction of the impression cylinder so that printing is performed at a fixed position from the front end of the metal plate. A front abutment pivotally supported by a repetitive rotary operation shaft, and a front abutment of the printing press, comprising a jaw that is supported by the front abutment and the barrel shaft and that can hold and open and close a metal plate abutting on the front abutment. It relates to an operation mechanism.

(Prior Art) In a conventional sheet-fed rotary printing press for metal plate printing, a front contact for registering a front end of a metal plate is coaxial so as to operate integrally with a jaw opening / closing operation of an impression cylinder for holding the metal plate. It has a fixed mounting method.

In the jaws of this metal plate printing machine, after the front end of the supplied metal plate abuts against the front pad, the jaws are mechanically set and adjusted at the front end of the metal plate by a predetermined pressure. The timing until the mouth was held was shifted due to the difference in plate thickness.

For example, when the plate thickness is thick, the timing is advanced,
If it is thin, it will be delayed.

Therefore, for example, when printing a relatively thick metal plate, the rear end of the metal plate is pressed by a pusher (a pushing mechanism such as a pushing pin for pushing the metal plate in the direction of the impression cylinder). It is fed at a certain speed toward the impression cylinder. And the front end of the plate abuts against the front contact of the impression cylinder,
Next, the pusher (such as a push pin for pushing the metal plate in the direction of the impression cylinder) is not closed until the impression cylinder jaws close and hold the front end. There is no problem if the pushing mechanism is properly set to release the pushing action of the metal plate after the deceleration mode enters the deceleration state. When the pusher is in an incomplete gripping pressure state before the gripper fully grips the board at the predetermined pressure at the timing, the pusher enters the deceleration state, and the pushing operation by the pusher is released, so metal The contact of the plate with the pusher by the pusher becomes unstable, and the jaw finally ends the gripping operation of the front end of the metal plate in the state where the contact with the front contact is unstable, stabilizing the printing register It affects sex.

(Object of the Invention) The present invention is applicable to any printing operation regardless of the closing operation end point in which the claw of the impression cylinder ends the pressing and closing operation against the claw base of the impression cylinder.
By providing an operation end point stop unit so that the end point of the pre-applied operation is at a fixed position for each printing operation, the pre-applied operation is always stopped at a fixed position regardless of the fluctuation of the closing amount of the jaw due to the difference in metal plate thickness. An object of the present invention is to print the metal plate in a stable contact state by bringing the front end of the metal plate into contact with the front contact stopped at a certain position.

(Structure of the Invention) The present invention includes a plurality of claw tables 4 provided at the same height as the outer peripheral surface of the impression cylinder 1 along a cut groove 3 provided on the outer periphery 2 of the impression cylinder 1 in the direction of the rotation axis 1a, and the claw. A plurality of jaws 5 which are closed / opened relative to the table 4, and a front end P _{1 of the} metal plate P located between the jaws 5;
A plurality of front abutments 6 for contacting the same, and the jaw 5 and the front abutment 6 are rotatably supported on the same operation shaft 7, and the main body of the claw 5 is supported by the same operation shaft 7. It is connected to a fixed jaw opening / closing arm 8 which is fixed by an elastic member 10 for urging in the closing direction, and is provided so as to be openable / closable by the arm 8. The jaw 5 is pressed against the claw base 4 by an elastic member 11 which urges a separate front abutment operation arm 9 pivotally supported in a front abutment operation direction which is a direction approaching the front abutment reference position. A pre-contact operation mechanism of a metal plate printing machine characterized by comprising an operation end point stop portion 12a such that an end point of a pre-applying operation, which is a pre-applying reference position, is always at a fixed position regardless of an end point position of a closing operation. .

(Operation of the Invention) The present invention is based on the idea that when a metal plate is gripped and printed by the gripper of the impression cylinder, the amount of closing motion of the gripper in the gripping operation by closing the gripper is determined by the thickness of the metal plate. The front contact position (rotational angle posture with respect to the operating axis) can always be stopped at a fixed position regardless of the size of the metal plate, and the metal plate can be stably abutted against the front contact. Can be.

(Embodiment) The present invention will be described in detail with reference to the drawings of one embodiment of FIGS. 1 and 2. The outer periphery of the impression cylinder is formed along a cut groove 3 provided on the outer periphery 2 of the impression cylinder 1 in the direction of the rotation axis 1a. A plurality of claw bases 4 provided at the same height as the surface; and a plurality of (for example, 5 to 8) claw pawls 5 which are closed and opened relative to the claw bases 4;
5,5 comprises a plurality of front lays body 6 and in contact with the front end P ₁ of the metal plate P those located between .......

An operating shaft 7 rotatably supported at both ends in the width direction of the impression cylinder 1 so as to be rotatable in parallel with the direction of the impression cylinder rotation axis 1a in the cut groove 3.
And the jaw 5 and the front body 6 are supported by the operating shaft 7 in a free rotation state.

In one embodiment of the present invention, the front contact body 6 includes
It is a size that can be rotated via the operation shaft 7 inside the main body 6, and the front end P ₁ of the metal plate P
Is provided with a concave groove contact portion 6b into which the groove enters.

The contact portion 6b is provided on the upper surface of the front body 6 with a spacer 17 in the form of a metal plate having a thickness approximately equal to or slightly larger than the thickness of the metal plate P. Attach the upper plate 18 on the spacer 17 with screws or the like so that the front end of the spacer 17 is located inside the front end.
The spacer 18 may be attached and fixed with screws or the like so that the front end of the spacer 18 projects from the front end of the spacer 17.

In the cutting groove 3 of the impression cylinder 1, an operating shaft 7 that is rotatably supported in the direction of the shaft 1 a is pivotally supported on both side walls of the impression cylinder and is freely rotated by the operating shaft 7. In this state, the jaws 5 (via a cylindrical bracket 5a integral with the jaws 5) and the front body 6 are pivotally supported, and the jaws 5 and the front body 6 are respectively opened and closed. The jaw opening / closing arm 8 and the front contact operating arm 9 are each supported by the operating shaft 7 and are supported. The jaw opening / closing arm 8 and the jaw opening / closing plate 5b of the jaw 5 are connected to an elastic member 10 such as a spring. And urge each in the direction to close the claw 5. Further, the front contact operation arm 9
And the front contact operating plate 6a of the front contact main body 6 by means of an elastic member 11 such as a spring, thereby urging the front contact main body 6 in a direction in which the front contact main body 6 is operated. Each claw opening / closing arm 8 is integrally provided with a claw release pressing plate 8a.
(Tubular bracket 5a integral with claw 5) A protruding claw opening / closing plate 5b is integrally provided outside. Then, the jaw opening / closing arm 8 is rotated through the operation shaft 7 by a predetermined angle in the left rotation direction in the drawing, and the jaw opening / closing plate 5b is pressed by the jaw opening / pressing plate 8a integral with the arm to open and close the jaws 5 respectively. The opening operation is performed. The pressing plate 8a and the opening / closing plate 5b are provided so as to cross each other.

Further, each of the front-contact operation arms 9 is provided with a front-contact operation pressing plate 9a, and each of the front-contact operation arms 9 is integrally provided with the front-contact operation plate.
6a. Then, the front contact operation arm 9 is rotated through the operation shaft 7 by a predetermined angle in the left rotation direction in the drawing, and a front contact operation integrally provided on the front contact body 6 by the operation pressing plate 9a integral therewith. The front body 6 is operated by pressing the plate 6a. The pressing plate 9a and the operation plate 6a are provided so as to intersect each other.

Further, the front contact body 6 is provided with a stop contact portion 12a below the front contact operation plate 6a, and provided with an operation end point setting convex portion 13 projecting to a position where it is pressed against the corresponding portion 12a. Department
By means of 13, the operation end point is set as a front contact reference position of the front contact body 6 urged in the operation direction by the elastic member 11 such as a spring.

One end of the operating shaft 7 rotatably supported in the cut groove 3 of the impression cylinder 1 extends on the outer surface of the impression cylinder 1, and the end of the shaft 7 is Then, the operation arm 14 having the cam follower 15 at the tip is attached.

Further, the operation arm 14 is oscillated by slidingly contacting the cam follower 15 on the printing press main body frame side that supports the rotary shaft 1a of the impression cylinder 1 opposite to the outer surface of the impression cylinder 1 on the side where the operation arm 14 is mounted. An appropriately shaped cam 16 to be operated is provided.

A biasing arm 19 is provided at one end of the operating shaft 7, and an elastic member 21 such as a spring for biasing the biasing arm 19 in a direction in which the operating shaft 7 closes the claws is provided on the side of the impression cylinder 1. The elastic member 21 such as a spring is attached to a mounting portion 20 which is integral with the side surface of the impression cylinder 1.

The operation of the present invention will be described in detail. In the rotational phase position of the impression cylinder 1 in a state where the tip cam follower 15 of the operation arm 15 of the impression cylinder 1 is not in sliding contact with the cam 16, an elastic member is provided.
The urging arm urged in the right-hand direction in the drawing by 21
By 19,咥爪5, the front end P ₁ of the metal plate P in the state of example mouth,咥爪closing arms 8 pivotally supported fixed to the operation shaft 7 integral to the urging arm 19 via the elastic member 10 By claw rest 4
The side is in a closed pressing state. The pressing force of the jaw 5 against the claw base 4 in this case corresponds to the urging force of the elastic member 10.

In the case of this rotational phase position, the front contact main body 6 is configured such that the front contact operation arm 9 integrated with the operating shaft 7 presses the front contact operation plate 6 a integral with the front contact main body 6 via the elastic member 11. In a state of being urged rightward in the drawing around the operation shaft 7, the stop contact portion 12 a of the front contact body 6 is pressed against the closing end point setting convex portion 13 to be set by the convex portion 13. The stop operation is performed at the position of the constant rotation angle (the same horizontal posture with respect to the metal plate P supplied horizontally from the right in FIG. 1).

Next, when the impression cylinder 1 rotates to the left around the rotation axis 1a in the drawing and the cam follower 15 comes to a rotational phase position where the cam follower 15 slides on the cam 16, the operation arm 14 is moved by the cam follower 15 to the urging arm.
While the elastic member 21 attached to 19 is compressed against its urging force, the operating shaft 7 is rotated in the left rotation direction in the drawing, and the claw opening / closing arm 8 pivotally fixed to the operating shaft 7 moves in the same direction. The claw 5 is rotated by rotating while pressing the claw opening / closing plate 5b by the claw body pressing plate 8a integral with the arm 8, and the claw 5 is opened. (Not shown) and is discharged forward (to the left in the drawing) while being printed while being nipped at a predetermined printing pressure.

In this rotational phase position, the front contact main body 6 is configured such that the front contact operation arm 9 integrated with the operation shaft 7 rotates in the left direction in the drawing, and the front contact pressing plate 9a integral with the operation arm 9 moves forward. while pressing the operation plate 6a against, by rotating the drawing left direction about the operation axis 7, the metal plate front end P ₁ is disengaged from the abutment portion 6b of the front against the body 6, the impression cylinder 1 The printing is performed by the nip pressure between the printing cylinder and the printing cylinder, and the printing paper is discharged forward (to the left in the drawing).

FIG. 3 is a plan view of the pre-applying operation mechanism of the present invention in the printing press impression cylinder, and shows a plurality of claw tables 4 provided in cut grooves 3 provided on the outer periphery 2 of the impression cylinder 1 in the direction of the rotation axis 1a. An operating shaft 7 mounted in the incision 3, each jaw 5 pivotally supported by the shaft 7 and provided at a position facing each claw base 4, and between each jaw 5 FIG. 3 illustrates each front contact body 6 supported by a shaft 7. The front body 6 is usually attached one by one to the left and right sides of the operation shaft 7.

FIG. 4 is a side view of the impression cylinder illustrating a general arrangement of an operation arm 14, a cam follower 15, and a cam 16 for rotating the operation shaft 7 attached to the impression cylinder 1. .

(Effects of the Invention) In the present invention, in the printing of a metal plate, even if a change in the edge end operation timing due to a change in the plate thickness occurs, the front contact body is always fixed at a constant operation end point regardless of the change in the timing. The stop operation can be performed at an angle, and the front body can be kept stationary until the jaws completely grip the metal plate. In addition, the pushing mechanism that feeds and transports the metal plate to the printing impression cylinder by pushing the trailing end of the metal plate into a decelerating operation, and separates from the rear end of the metal plate, or until immediately before that, separates the front end of the metal plate. The portion can be stably brought into contact with the contact portion of the front body, which is practically useful for improving printing register accuracy in metal plate printing and improving the efficiency of adjustment work of the front body.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of the front cover of the present invention installed on a printing press impression cylinder, FIG. 2 is a side view of the present invention claw installed on the printing press impression cylinder, FIG. FIG. 4 is a plan view of an impression cylinder illustrating an arrangement of a front jaw and a jaw according to an embodiment of the present invention. FIG. 4 is an impression cylinder illustrating a swinging mechanism of an operation shaft for simultaneously rotating the jaw and the front jaw body. FIG. 1 ... impression cylinder, 1a ... rotating shaft, 2 ... outer periphery, 3 ... kerf,
4 ... Nail base, 5 ... Nail, 5a ... Tubular bracket, 5b ...
... jaw opening / closing plate, 6 ... front contact body, 6a ... front contact operating plate, 6b ... contact part, 7 ... operating axis, 8 ... jaw opening / closing arm, 8a ... jaw main body pressing plate , 9 ... front arm
9a: Front body pressing plate, 10, 11 ... Elastic member, 12a ...
Stop abutment part, 13: Operation end point setting projection, 14: Operation arm, 15: Cam follower, 16: Cam, 17: Spacer, 18: Upper plate, 19: Biasing arm, 20 ... Stop plate,
21 ...... elastic member, P ...... metal plate, P ₁ ...... front end

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of claw tables 4 provided at the same height as the outer peripheral surface of the impression cylinder 1 along a cut groove 3 provided on the outer circumference 2 of the impression cylinder 1 in the direction of the rotation axis 1a. And a plurality of jaws 5 that perform closing / opening operations and a front end P _{1 of the} metal plate P located between the jaws 5
A plurality of front abutments 6 for contacting the same, and the jaw 5 and the front abutment 6 are rotatably supported on the same operation shaft 7, and the main body of the claw 5 is supported by the same operation shaft 7. It is connected to a fixed jaw opening / closing arm 8 which is fixed by an elastic member 10 for urging in the closing direction, and is provided so as to be openable / closable by the arm 8. The jaw 5 is pressed against the claw base 4 by an elastic member 11 which urges a separate front abutment operation arm 9 pivotally supported in a front abutment operation direction which is a direction approaching the front abutment reference position. A front contact operation mechanism for a metal plate printing machine, comprising: an operation end point stop portion 12a such that an end point of a front contact operation, which is a front contact reference position, is always at a fixed position regardless of an end point position of a closing operation.