JPH034520Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film sticking device for a plate cylinder in a rotary printing press.

In a conventional rotary printing press, as shown in FIG. 1, in order to attach the film 2 on which the plate is attached to the plate cylinder 1, the locking part 3a at one end of the film 2 is moved in an appropriate position in the circumferential direction of the plate cylinder 1. The film 2 is wound around the plate cylinder 1 by being engaged with the engagement groove 4 recessed in a location, and the locking portion 3b at the other end of the film 2 is disposed on the plate cylinder 1 close to the engagement groove 4. The film winding rod 5 is engaged with the engagement groove 6 of the film winding rod 5 as shown in FIG. It was pasted. The film winding rod 5 is rotatably disposed in a cylindrical groove 8 with a part of the peripheral surface cut out on the outer periphery of the plate cylinder 1, and allows rotation only in the winding direction of the film 2, and is prevented from rotating in the opposite direction. A ratchet wheel and pawl (not shown) are provided to perform this. When removing the film 2, the claw is disengaged from the ratchet wheel and the film winding rod 5 is rewound. However, such a film sticking device requires two workers, one to hold the film 2 and the other to wind the film 2, and also requires a tool such as a spanner 7 to turn the film winding rod 5. There was a problem in that people sometimes left behind items in the machine, which often caused serious trouble when the machine was operated.

In view of the above problems, the present invention aims to provide a film sticking device for a plate cylinder that automates the winding of the film using a film winding rod so that the film can be stuck by one operator. .

For this reason, the present invention provides a pinion at the end of the film winding rod disposed on the outer periphery of the plate cylinder, and a wheel rotatable around the axis of the plate cylinder, and teeth are carved on the outer periphery to mesh with the pinion. The film winding rod is rotated by the rotation of the wheel, and the rotation of the wheel is transmitted between a protrusion protruding from the wheel and a protrusion protruding from the outer periphery of the shaft of the printing cylinder. A film adhering device is provided in which fluid is supplied to an extensible hollow body disposed in a cylinder through a fluid supply passage provided in a shaft portion of a plate cylinder, and the hollow body is expanded.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. Components that are substantially the same as those described in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted. A pinion 11 is attached to one end of the film winding rod 5 so as to be opposed to the side surface 1a of the plate cylinder 1. In addition, the plate cylinder 1 is located on the side 1a of the plate cylinder 1.
A wheel body 12 is disposed facing each other so as to be rotatable about the axis of the wheel body, and teeth 13 that mesh with the pinion 11 are carved on a part of the outer periphery of the wheel body 12. The ring body 12 has a cross section L consisting of a cylindrical portion 12a and an annular plate portion 12b extending radially outward from one end of the cylindrical portion 12a.
The teeth 13 are formed on the outer periphery of the annular plate portion 12b, and the inner periphery of one end of the cylindrical portion 12a is slidably fitted into a bearing ring 14 fixed to the side surface of the plate cylinder 1, and the inner periphery of the other end is It is slidably fitted onto the outer periphery of a support ring 15 that is externally fitted and fixed to the shaft portion 10 of the plate cylinder 1. Projections 16 are provided on the inner periphery of the cylindrical portion 12a of the ring body 12 to extend radially inward from two diametrically opposed locations to near the outer periphery of the plate cylinder shaft 10. Also provided are protrusions 17 extending radially outward from two diametrically opposed locations and reaching near the inner periphery of the cylindrical portion 12a, with an appropriate interval between the opposing surfaces of one of these protrusions 16 and 17. A bellows-shaped tube 18, which is a hollow body that can be expanded and contracted, is disposed between the other facing surfaces in a state where the tube is held in place. 19 is the plate cylinder shaft portion 10
A fluid supply passage bored along the axis, one end communicating with a pneumatic or hydraulic power source (not shown), and the other end passing through the plate cylinder shaft 10 in the diametrical direction and passing through the protrusion 17. A communication passage 2 that communicates with the inside of the bellows-shaped tube 18 through the
Connected to 0. Note that the wheel body 12 is urged to rotate by a spring or the like as appropriate so as to leave a gap between the opposing surfaces of one of the protrusions 16 and 17.

To attach the film 2 in the above configuration, the locking portion 3a at one end of the film 2 is engaged with the locking groove 4, the film 2 is wound around the plate cylinder 1, and the locking portion 3a at the other end of the film 2 is engaged with the locking groove 4. After the film winding rod 5 is engaged with the engagement groove 6, a switch such as a push button is operated to operate a solenoid valve (not shown) to supply pressurized fluid such as compressed air to the fluid supply passage 19. Then, the pressure fluid flows into the bellows-like tube 18 through the flow path 20, expands it, and moves the protrusion 16 on the ring body 12 side from the A position to the B position in FIG. 3. As a result, the wheel 12 rotates, the film winding rod 5 rotates via the teeth 13 and the pinion 11, and the film 2 is wound up and tautly attached around the plate cylinder 1.

According to the film sticking device for a plate cylinder of the present invention, as is clear from the above description, a pinion is provided at the end of the film winding rod, and this pinion is used to rotate the wheel that can rotate around the axis of the plate cylinder. The ring body is rotated by extending the extensible hollow body by the pressure fluid supplied from the fluid supply passage provided in the shaft portion of the plate cylinder, so that the pressurized fluid is supplied. Just by operating the solenoid valve, etc., the film can be wound with the film winding rod, and the film can be pasted in one step.
It can be done by a human operator, and since no tools are required, there is no risk of troubles caused by misplacement.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional example, Figure 1 is a side view showing the schematic arrangement, Figure 2 is a perspective view of the film winding rod and rotating tool, and Figures 3 and 4 are the invention of the present invention. FIG. 3 is a side view of the main part, and FIG. 4 is a partially sectional front view of the main part. 1 is a plate cylinder, 2 is a film, 3a and 3b are locking parts, 4 is an engagement groove, 5 is a film winding rod, 6 is an engagement groove, 10 is a shaft of the plate cylinder, 11 is a pinion, and 12 is a ring. 13 is a tooth, 16 and 17 are protrusions, 18 is a hollow body, 19 is a fluid supply passage, and 20 is a communication passage.

Claims (1)

[Scope of utility model registration request] A pinion is provided at the end of a film winding rod disposed on the outer periphery of the plate cylinder, and a wheel rotatable around the axis of the plate cylinder is provided, and teeth that mesh with the pinion are carved on the outer periphery of the ring. An expandable hollow body is disposed between a protrusion protruding from the body and a protrusion protruding from the outer periphery of the shaft of the plate cylinder, and a fluid supply passage communicating with the hollow body is connected to the shaft of the plate cylinder. A film sticking device for a plate cylinder, characterized in that it is provided in a plate cylinder.