JPH0425334Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a printing plate dust removal device for removing dust attached to a printing plate attached to a printing cylinder of a printing press.

[Prior art and problems]

In order to obtain good print quality on printing paper, the surface of the plate wrapped around the plate cylinder must be clean. You can't expect the print finish to be as good as it should be.
Therefore, a dust removal device is used to clean the plate before feeding the paper for printing.

In conventional dust removal devices, a movable frame is slidably provided on a guide rail provided along the axial direction of the printing plate, and a dust removal plate is attached to the movable frame so that its tip comes into contact with the surface of the printing plate. After installation, dust removal from the plate surface is carried out by attaching the dust on the plate surface to the tip of the dust removal plate.

In such a conventional plate dust removal device,
After the dust removal work of the dust removal plate is completed, in order to clean the tip of the dust removal plate with dust attached, the dust removal device returns to the normal position after the dust removal work and returns the dust removal plate to its stopping position while spraying the solvent. The tip of the dust removal plate was cleaned using a small brush wheel installed nearby. However, in such a dust removal device, a solvent spray device, a small brush wheel drive device, and a control device for these must be provided around the printing plate, making the mechanism complicated. This also results in a relatively high maintenance cost for the device, and also requires a waste liquid recovery mechanism after cleaning, resulting in high costs and a disadvantage in that it lacks practicality and economic efficiency.

[Purpose of invention]

The present invention eliminates the above-mentioned drawbacks, makes the dust removal plate detachable for removing dust from the plate surface, and allows the cleaning process of the tip of the dust removal plate to be performed outside the machine, resulting in a simple and economical device configuration. The purpose of the present invention is to provide a dust removal device with enhanced functionality and practicality.

[Summary of the idea]

The purpose of this is to provide a moving frame that is guided in movement along guide rails provided along the axial direction of the circumferential surface of the printing plate mounted on the plate cylinder, and a moving frame that moves toward and away from the circumferential surface of the printing plate. It has a support frame whose position can be adjusted in the direction, and a dust removal plate which is detachably attached to the support frame and can come into contact with and separate from the plate surface, and the tip of the dust removal plate is brought into contact with the plate surface. This is achieved by letting

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the dust removal device based on the present invention shown in FIGS. 1 to 3, a guide rail 1 is provided along the axial direction of the printing plate P on the plate cylinder. A movable frame 2 is placed on this guide rail 1.
It is formed into a U-shaped flat plate with one end sandwiched in between. The movable frame 2 is configured to slide on the guide rail 1 via a drive device (not shown). A support frame 6 is mounted and extended on the movable frame 2 in the direction of contact with the circumferential surface of the plate, and its tip portion is formed into a thin flat plate shape and forms a dust removal plate receiving portion 7. This support frame 6
A moving mechanism (not shown) is provided inside so that it can move forward and backward in the circumferential direction of the plate P. Furthermore, a locking member 8 is provided on the side surface of the support frame 3 for detachably attaching and fixing the support frame 6 onto the movable frame 2. The dust removing plate 9 is attached to the holding plate 11 by screws 10 on the dust removing plate receiving portion 7.
It is removably screwed on via the . Also,
An air cylinder (not shown) for moving the guide rail 1 toward and away from the surface of the plate P is provided at the end of the guide rail 1, and a fine adjustment screw (not shown) is provided to adjust the distance between the guide rail 1 and the surface of the plate P. I try to adjust it depending on.

[Effect]

First, when dust or dirt adheres to the peripheral surface of the printing plate mounted on the plate cylinder, the start button of the movable frame drive device is pressed to slide and guide the dust removal device main body along the guide rail to the dust adhesion area. At this time, the guide rail 1 is separated from the plate surface so that the dust removal plate 9 of the dust removal device does not come into contact with the plate surface. When the movable frame reaches the appropriate position, the dust removal device stops, and then the guide rail 1 is brought close to the plate surface by the action of the air cylinder.
As a result, the tip of the dust removal plate 9 comes into contact with the printing plate, and the dust removal operation is started. At this time, the fine adjustment screw of the air cylinder is operated to adjust the contact pressure of the tip of the dust removal plate 9 with the peripheral surface of the plate.
When the dust removal work is completed, the dust removal device returns to its normal position. As shown in FIG. 3, the dust removal plate 9 extends approximately in the radial direction of the plate cylinder, and its tip is bent and comes into contact with the surface of the plate P in an inclined state with respect to the radial direction of the plate cylinder. ing. Therefore, in FIG. 3, the dust removal plate 9 can be strongly pressed against the surface of the plate P, and from the surface of the plate P rotating clockwise,
You can definitely remove the trash. This device does not require a cleaning device for cleaning the tip of the dust removal plate, and when cleaning the dust removal plate 9, it can be removed from the support frame 6 with a single touch operation and cleaned separately outside the machine. I can do it. If you remove the dust removal plate from such a removable structure and simply attach and replace the already cleaned dust removal plate to the support frame, you can save time for cleaning the tip of the dust removal plate and quickly clean the printing plate. This will allow you to carry out garbage removal work.

Furthermore, the mechanism for attaching and detaching the dust removal plate 9 may be formed by another one-touch mechanism instead of screws.

〔effect〕

If the dust removal device based on the present invention is used, there is no need to provide a mechanism for cleaning the tip of the dust removal plate in conjunction with the dust removal device, which simplifies the device and allows cleaning to be performed outside the machine. Therefore, a waste liquid recovery device is not required, and as a result, the cost of the entire device can be reduced, and as a result, the practicality and economic efficiency of the device can be improved.

In addition, cleaning the tip of the dust removal plate can be done separately by removing the dust removal plate, so prepare an already cleaned or new dust removal plate in advance and finish the dust removal work immediately after the dust removal is completed. The dust removal plate can be replaced with the dust removal plate, and the cleaning time for the tip of the dust removal plate can be saved, resulting in faster printing operations for the entire printing machine.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a dust removal device based on the present invention, FIG. 2 is a plan view of a dust removal plate in the dust removal device based on the invention, and FIG. 3 is a dust removal plate in the dust removal device based on the invention. FIG. 1... Guide rail, 2... Moving frame, 6
...Support frame, 7...Dust removal plate receiving part, 9
...Garbage removal board, 10...Screw, P...Printing version.

Claims (1)

[Scope of utility model registration request] A moving frame that is movably guided along a guide rail provided along the axial direction of the plate cylinder on which the plate is mounted, and a support that is attached to the moving frame and is movable in directions toward and away from the surface of the plate. It has a frame and a dust removal plate removably attached to the support frame, and the dust removal plate extends approximately in the radial direction of the plate cylinder, and its tip is bent and tilted with respect to the radial direction of the plate cylinder. A device for removing dust from a printing plate, characterized in that the device is brought into contact with the surface of the printing plate.