JPH0664867U - Plate - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a plate cylinder in which the printing plate can be easily attached and detached. [Structure] A large number of suction holes 4 penetrating from an outer diameter surface to an inner diameter surface are formed in a cylindrical body 1 having a hollow inside. Body 1
The suction passage 5 is formed in the plate cylinder shaft 2b provided at the end of the. A suction force is applied to the suction hole 4 from the suction passage 5 to cause the body 1
The printing plate A wrapped around the outer periphery of the is adsorbed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plate cylinder of a printing machine.

[0002]

[Prior art]

 To attach the printing plate to the plate cylinder, double-sided adhesive tape is used to adhere the entire surface to the plate cylinder, or a clamp is installed in the groove provided on the outer periphery of the plate cylinder, and the clamp wraps around the plate cylinder. A method of holding both ends of a printing plate thus prepared is conventionally known.

[0003]

[Problems to be solved by the device]

 By the way, with either method, it is difficult to attach and detach the printing plate, and it takes a lot of time to replace the printing plate, and it often damages the printing plate when detaching it. There is also a problem that it takes time to adjust the twist.

This invention has a technical problem to solve the above-mentioned conventional problems and to provide a plate cylinder that allows easy exchange of a printing plate and adjustment of twist.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, a large number of suction holes are uniformly formed on the entire outer periphery of a hollow cylindrical body, and one of the plate cylinder shafts provided at both ends of the cylinder is provided. This is because a suction passage is provided inside the body to apply suction force.

[0006]

[Action]

 To attach the printing plate to the plate cylinder configured as described above, wrap the printing plate around the plate cylinder, apply suction force to the suction passage, and apply suction force to the entire suction hole to form the printing plate. Adsorb.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a cylindrical body 1 having a hollow inside has plate cylinder shafts 2a and 2b at both ends, and the plate cylinder shafts 2a and 2b are side frames of a printing machine. It is rotatably supported at 3.

A large number of suction holes 4 are uniformly formed on the outer periphery of the body 1 so as to penetrate from the outer diameter surface to the inner diameter surface. A suction passage 5 extending in the axial direction is provided on one plate cylinder shaft 2b of the body 1, and the suction passage 5 is open at the shaft end surface of the plate cylinder shaft 2b.

A hose joint 7 is rotatably attached to the end of the plate cylinder shaft 2b via a bearing 6, and a suction hose 8 is connected to the hose joint 7.

The plate cylinder shown in the embodiment has the above-mentioned structure, and when mounting the printing plate on the plate cylinder, the printing plate A is wound around the outer periphery of the body 1 as shown in FIG. The printing plate A is wound around the outer periphery of the body 1 while applying suction force to the suction passage 5 or while applying suction force to the suction passage 5.

Here, the printing plate A is sized so as to cover the entire suction hole 4 of the body 1.

When a suction force is applied to the suction passage 5 in a state where the printing plate A is wound around the body 1, the suction force acts on each suction hole 4, so that the printing plate A is sucked and the body 1 It is kept wound around the outer periphery of the.

When adjusting the twist of the printing plate A, the suction force on the suction holes 4 is weakened, or the printing plate A is manually moved in a state where the suction is released.

[0015]

[Effect of device]

 As described above, in the plate cylinder according to the present invention, the printing plate is attracted by the suction force applied to the suction hole, so that the printing plate can be easily attached and detached, and the printing plate can be replaced. Work can be done efficiently in a short time, and the printing plate can be removed without damaging it.

Further, since the printing plate can be moved along the outer periphery of the plate cylinder by weakening the suction force to the suction hole or releasing the suction, it is easy to adjust the twist of the printing plate.

Furthermore, since a large number of suction holes are formed uniformly over the entire body, it is possible to obtain a mounting state in which the entire inner surface of the printing plate is in close contact with the outer periphery of the body, and printing with extremely high accuracy can be performed. .

Further, when the length of the printing plate is shorter than the circumference of the outer diameter surface of the body, the interval between the patterns printed on the continuous paper becomes large, but in the case of the present application, the circumference of the outer diameter surface of the body is large. Since a printing plate equal to the length can be used, it is possible to print with a small space between patterns.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a plate cylinder according to the present invention.

FIG. 2 is a central longitudinal sectional view of the same as above.

FIG. 3 is an exploded perspective view showing the plate cylinder and the printing plate of the same.

[Explanation of symbols]

 1 Body 2b Plate barrel 4 Suction hole 5 Suction passage

Claims (1)

[Scope of utility model registration request] 1. A large number of suction holes are uniformly formed on the entire outer periphery of a hollow cylindrical body, and suction force is applied to one of the plate cylinder shafts provided at both ends of the body. A plate cylinder with a suction passage.