JPH0516311U - Blanket cylinder cleaning device - Google Patents

Abstract

(57) [Summary] [Purpose] To make it easier to remove dirt on both sides of the blanket cylinder. [Structure] The running non-woven fabric 5 is elastic member 1 from behind.
1 is pressed toward the surface of the blanket cylinder 2. The elastic member is composed of a metal plate that curves and projects toward the surface of the blanket cylinder. The pressing force generated by the metal plate increases further on both sides of the blanket cylinder,
In particular, the effect of cleaning a portion where a large amount of paper dust or the like is attached and which is easily soiled is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a blanket cylinder cleaning device for an offset printing machine.

[0002]

[Prior Art]

 As a conventional blanket cylinder cleaning device of this type, there is one that cleans the surface of the blanket cylinder by pressing the running non-woven fabric from behind with a rubber material toward the surface of the blanket cylinder.

That is, while the nonwoven fabric is elastically pressed against the surface of the blanket cylinder by a rubber balloon inflated like a pillow, the continuous nonwoven fabric is run and the surface of the blanket cylinder is wiped with the nonwoven fabric. In addition, in a normal case, the non-woven fabric is sprayed with a cleaning liquid.

[0004]

[Problems to be solved by the device]

 However, in the conventional blanket cylinder cleaning device described above, since the non-woven cloth is pressed by the elastic material in the form of a rubber balloon, the pressing force is high in the central part of the blanket cylinder, but relatively small on both sides. .

Paper dust coming out from both ends of the printing paper is liable to accumulate on both sides of the printing paper. Therefore, if the pressing force at the printing paper is reduced, the cleaning effect is reduced.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a blanket cylinder cleaning device for cleaning a surface of a blanket cylinder while pressing a running nonwoven fabric from behind against the surface of the blanket cylinder by an elastic member, wherein the elastic member is The blanket cylinder is made of a metal plate curved so as to project toward the surface of the blanket cylinder, and its generatrix is arranged so as to be parallel to the central axis of the blanket cylinder.

[0007]

[Action]

 The curved metal plate presses the non-woven fabric against the surface of the blanket cylinder. For this reason, the pressing force on both sides of the blanket cylinder is higher than the pressing force on the central part of the blanket cylinder, and the dirt due to the adhesion of paper dust or the like is likely to be removed.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the blanket cylinder cleaning device 1 includes a main frame 3 extending along the generatrix direction of the surface of the blanket cylinder 2.

The main frame 3 is covered with a cover 4, and in the cover 4 behind the main frame 3, a feeding roll 6 and a winding roll 7 of the nonwoven fabric 5 are arranged in parallel.

Then, the non-woven fabric 5 fed from the feeding roll 6 travels from the bottom to the top in front of the main frame 3 and returns to the back of the main frame 3 again to be wound up by the winding roll 7. ing. In order to make the running of the non-woven fabric 5 smooth, a cylindrical body 8 is installed in the lower part on the front side of the main frame 3, and a round bar 10 is installed in the upper part via an arm 9 so as to extend in the direction of the busbar. Has been done.

Although not shown, the output shaft of the motor is connected to the shaft of the take-up roll 7 via a predetermined joint, and the take-up roll 7 takes up the nonwoven fabric 5 by driving the motor. A new non-woven fabric is pulled out from the feeding roll 6.

On the front side of the main frame 3 on which the new non-woven fabric 5 travels, an elastic member 11 is provided which presses the traveling non-woven fabric 5 from behind toward the surface of the blanket cylinder 2.

The elastic member 11 is composed of a metal plate curved so as to project toward the surface of the blanket cylinder 2. The metal plate is made of spring steel, for example. The elastic member 11 is arranged so that its generatrix is parallel to the central axis of the blanket cylinder 2 and is fixed to the fixing pieces 13 and 14 at the four corners 12 with screws 15 so as to keep the curved state. Has been done. The fixing pieces 13 and 14 are fixed to the main frame 3.

A rubber sheet 16 is attached to the front surface of the elastic member 11 to more elastically support the non-woven fabric 5, and a synthetic resin film 17 is further covered thereon. The synthetic resin film 17 is fixed to the fixing pieces 13 and 14 together with the elastic member 11.

As a result, the pressing force F by which the elastic member 11 presses the nonwoven fabric 5 toward the blanket cylinder 2 side is distributed as shown in FIG. That is, the pressing force at the side portions B of the blanket cylinder 2 is higher than that at the central portion A, and the cleaning effect of the portion where the paper dust sticks together with the ink or the like and easily causes stains is enhanced.

Reference numeral C in FIG. 2 denotes a printing paper, and the portions where the stains are likely to occur correspond to both edges of the printing paper C where the paper dust is likely to occur. The cylindrical body 8 also functions as a cleaning liquid supply unit.

That is, the cleaning liquid jetting nozzles 18 are attached to the cylindrical body 8 at a constant pitch, and the cleaning liquid pumped into the cylindrical body 8 is jetted toward the nonwoven fabric 5. Further, in this case, the nozzles 18 are oriented substantially parallel to the flow direction of the non-woven fabric 5 so that the cleaning liquid can be uniformly supplied to the non-woven fabric 5. A baffle plate 19 for receiving the non-woven fabric 5 is provided. The baffle plate 19 is fixed to the fixing pieces 13 and 14 together with the elastic member 11.

Next, the operation of the blanket cylinder cleaning device 1 will be described. By driving the motor, the nonwoven fabric 5 comes out of the feeding roller 6 and travels toward the winding roller 7 continuously or intermittently.

Further, the nozzle 18 sprays the cleaning liquid toward the nonwoven fabric 5. Then, the entire cleaning device 1 moves toward the blanket cylinder 2, and the elastic member 11 presses the nonwoven fabric 5 against the surface of the blanket cylinder 2.

As a result, the cleaning liquid is transferred from the non-woven fabric 5 to the surface of the blanket cylinder 2 to dissolve stains such as ink and paper dust, and the non-woven fabric 5 wipes the dissolved ink and the like while adsorbing and carrying the ink. Get to Roll 7.

Further, since the elastic member 11 presses the non-woven fabric 5 more strongly on both sides B of the surface of the blanket cylinder, the effect of cleaning the place where much paper dust is generated is enhanced.

[0022]

[Effect of the device]

 As described above, the present invention provides a blanket cylinder cleaning apparatus for cleaning a surface of a blanket cylinder by pressing a running nonwoven fabric from behind against the surface of the blanket cylinder with an elastic member, wherein the elastic member is the blanket cylinder. It is characterized in that it is composed of a metal plate curved so as to project toward the surface of the blanket, and its generatrix is arranged so as to be parallel to the central axis of the blanket cylinder. The pressing force for pressing against can be further increased on both sides of the blanket cylinder. Therefore, it is possible to enhance the cleaning effect particularly on a portion where a large amount of paper powder or the like is attached and which is easily soiled.

[Brief description of drawings]

FIG. 1 is a side view of a blanket cylinder cleaning device according to the present invention.

FIG. 2 is an explanatory diagram showing a distribution of pressing force by an elastic member.

[Explanation of symbols]

 B ... Both sides of blanket cylinder F ... Pressing force 1 ... Blanket cylinder cleaning device 2 ... Blanket cylinder 5 ... Nonwoven fabric 11 ... Elastic member

Claims (1)

[Scope of utility model registration request] 1. A blanket cylinder cleaning apparatus for cleaning a surface of a blanket cylinder by pressing a running nonwoven fabric from the back toward the surface of the blanket cylinder by an elastic member, wherein the elastic member projects toward the surface of the blanket cylinder. It is composed of a curved metal plate to
A blanket cylinder cleaning device, wherein the bus bar is arranged so as to be parallel to the central axis of the blanket cylinder.