JPH08174U - Offset printing machine Blanket cylinder dust remover - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a dust remover for a blanket cylinder of an offset printing machine without using a solvent liquid. [Structure] A first rotating brush that rotates in a direction opposite to the blanket cylinder at a peripheral speed higher than that of the blanket cylinder, and a first rotating brush disposed below the first rotating brush in the peripheral speed direction of the blanket cylinder. A second rotating brush that intersects with the brush and rotates in the opposite direction to the first rotating brush, and a rotating body that gives an impact to the two brushes are provided with a gabber that opens facing the blanket cylinder. The dust that has been removed and scattered in the cover is sucked by a vacuum dust collector.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved apparatus for removing dust adhering to the surface of an offset printing press blanket cylinder.

[0002]

[Prior art]

 Conventionally, the dust adhering to the surface of the blanket cylinder of an offset printing machine is removed by contacting the surface of the blanket cylinder and running an endless brush coated with a solvent liquid in the axial direction of the blanket cylinder. There is. This will be described with reference to FIGS. FIG. 3 shows a state in which the endless brush is separated from the blanket cylinder and is in a standby state without removing dust, and FIG. 4 shows a state in which the endless brush is in contact with the surface of the blanket cylinder to remove dust. 3 and 4, reference numeral a is a blanket cylinder of an offset printing machine, b is an endless brush supported and driven by two pulleys (not shown), and a brush b2 is formed on the outer peripheral surface of a belt b1. There is. c is a guide frame arranged between the two pulleys (not shown), d is a brush cleaning device for removing dust from the brush b2 of the endless brush b, and e is toward the brush b2 of the endless brush b. A nozzle for spraying a solvent liquid to apply it to the brush b2, a collecting tray for collecting the solvent liquid containing dust, and a contact point g for separating the brush cleaning device d from the brush b2 of the endless brush b. A hydraulic piston device, h is a cover fixed to the guide frame c, i is a recovery pipe that guides the solvent liquid accumulated in the recovery dish f to a required location, and j is the aforesaid adhering surface of the blanket cylinder a. It is a wiper roll that removes solvent liquid. In the state shown in FIG. 4, the rotation of a pulley (not shown) causes the brush b2 of the endless brush b to run on the outer peripheral surface of the blanket cylinder a in the direction of the center line of the blanket cylinder, while the nozzle e moves to The solvent liquid is sprayed toward the brush b2, dust on the outer peripheral surface of the blanket cylinder a is removed by the brush b2 moistened with the solvent liquid, and the dust attached to the brush b2 is removed by the brush cleaning device d. The solvent liquid adhering to b2 is removed together with the solvent liquid containing dust and drops onto the recovery dish f, and is guided to a predetermined location through a recovery pipe i opening in the recovery dish f. After the dust removal with the endless brush b is completed, the wiper roll j is brought into contact with the surface of the blanket cylinder a and rotated in the same direction as the blanket cylinder a (the traveling direction of the contact surface is the opposite direction), so that the blanket cylinder a has an outer peripheral surface. The adhered solvent liquid is removed. The arrow k indicates the direction of rotation of the blanket cylinder a. Since the dust removal device for the blanket cylinder of the offset printing machine with the above-mentioned conventional structure uses the solvent liquid which is a petroleum product, it may waste valuable petroleum resources and may cause environmental pollution depending on the treatment of the used cleaning liquid. There is a problem that there is.

[0003]

[Problems to be solved by the device]

 It is an object of the present invention to obtain a dust remover for an offset printing press blanket cylinder that can remove dust adhering to the outer peripheral surface of the offset printing press blanket cylinder without using a cleaning liquid.

[0004]

[Means for Solving the Problems]

 The problem of the present invention is solved by configuring the dust removing device of the blanket cylinder of the offset printing machine as follows. That is

A first rotating brush that is in contact with the outer peripheral surface of the blanket cylinder of the offset printing machine and that rotates on the contact surface in the same peripheral speed direction as the blanket cylinder at a peripheral speed higher than the peripheral speed of the blanket cylinder; , Arranged in contact with the blanket cylinder below the first rotary brush in the circumferential velocity direction of the blanket cylinder, intersecting with the first rotary brush, and rotating in the opposite direction to the first rotary brush. A second rotating brush, a rotating body that removes dust removed from the blanket cylinder and attached to the first and second rotating brushes from the first and second rotating brushes, and an outer peripheral surface of the blanket cylinder. A cover that opens opposite to and covers the first and second rotating brushes and the rotating body, and a space that communicates with the inside of the cover and sucks the dust scattered inside the cover. A configuration including a dust collector.

[0006]

[Action]

 Since the first and second rotating brushes rotate on the surface of the blanket cylinder toward each other, the dust removed from the surface of the blanket cylinder is separated from the surface of the blanket cylinder and the first and second rotating brushes. It is stored in the space where it is formed, and does not scatter to the outside even when it is in a dry state (even if it is not using a solvent liquid). Dust adhering to the first and second rotating brushes is removed by collision due to mutual crossing, and further by a rotating body that impacts the first and second rotating brushes. The dust scattered in the cover that covers the rotor and the rotating body is sucked by the vacuum dust collector, and the dust can be treated without using a solvent liquid.

[0007]

【Example】

 1 and 2 are cross-sectional views of the device of the present invention. FIG. 1 shows a standby state in which dust removal is not performed, and FIG. 2 shows two rotating brushes, a first and a second rotating brush, contacting a blanket cylinder. Shows the state in which dust removal is being performed. 1 and 2, reference numeral 1 denotes a blanket cylinder, which rotates in the direction indicated by arrow 2. Reference numeral 3 denotes a first rotating brush, which is a direction in which the peripheral velocity directions of the contact surfaces in contact with the blanket cylinder 1 are the same, that is, in the direction opposite to the rotating direction of the blanket cylinder 1, Rotates at a peripheral speed higher than the peripheral speed. The arrow 4 indicates the rotation direction of the first rotating brush 3. Reference numeral 5 denotes a second rotating brush, which intersects the first rotating brush 3 and is disposed below the first rotating brush 3 in the circumferential velocity direction of the blanket cylinder 1 so as to have the first rotating brush 3. It rotates in the direction opposite to the direction of rotation of 3, and therefore in the same direction as the blanket cylinder 1. The arrow 6 indicates the rotation direction of the second rotating brush 5. 7 impacts the first rotating brush 3 and the second rotating brush 5 to be removed from the outer peripheral surface of the blanket cylinder 1 and adheres to the first rotating brush 3 and the second rotating brush 5. A rotating body for removing dust that has been removed, 8 is an opening that faces the outer peripheral surface of the blanket cylinder 1, and covers the first rotating brush 3, the second rotating brush 5, and the rotating body 7, and 9 is the above This is an electric motor that drives the first rotating brush 3, the second rotating brush 5, and the rotating body 7. Although the drive of the first rotary brush 3, the second rotary brush 5 and the rotating body 7 by the electric motor 9 is not shown in the figure, it is also possible by the meshing of gears attached to the respective rotary shafts, This can be done by using a pulley and a belt attached to each rotating shaft. Of course, the first rotating brush 3, the second rotating brush 5, and the rotating body 7 may be rotated by separate electric motors. Reference numeral 10 denotes a vacuum dust collector that sucks dust scattered inside the cover 8. When the air inside the cover 8 is sucked together with the dust by the dust collector 10, the outside air is sucked from the gap 11 between the cover 8 and the outer peripheral surface of the blanket cylinder 1, so that the first and second The dust removed by the two rotating brushes is prevented from scattering outside the cover 8.

[0008]

[Effect of device]

 The blanket cylinder dust removing device of the present invention does not use solvent liquid, which is a petroleum product, to remove dust, so it does not waste valuable petroleum resources and also requires a treatment facility for used solvent liquid. The structure is simple because the nozzle that sprays and applies the solvent liquid to the brush that removes dust from the outer peripheral surface of the blanket cylinder, the means that supplies the solvent liquid to the nozzle, and the device that collects the solvent liquid that drops from the brush along with the dust are not required. In addition to being made compact, the endless brush, which is longer than the blanket cylinder, is not needed, and the overall shape of the dust remover is compact.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a state in which a dust removing device of a blanket cylinder of an offset printing press does not perform a dust removing action according to the present invention.

FIG. 2 is a cross-sectional view illustrating a state where the dust removing device of the blanket cylinder of the offset printing press according to the present invention is performing a dust removing action.

FIG. 3 is a cross-sectional view showing a state where the conventional device does not perform a dust removing operation.

FIG. 4 is a cross-sectional view showing a state where the conventional device performs a dust removing operation.

[Explanation of symbols]

 1 Blanket body. 2 Arrow indicating the direction of rotation of the blanket cylinder. 3 First rotating brush. 4 Arrow indicating the rotation direction of the first rotating brush. 5 Second rotating brush. 6 Arrow indicating the rotation direction of the second rotating brush. 7 Rotating body. 8 Cover. 9 Electric motor. 10 Vacuum dust collector. 11 Gap with the outer peripheral surface of the covered blanket cylinder.

Claims (1)

[Scope of utility model registration request] An offset printing press blanket cylinder (1)
Contacting the outer peripheral surface of the blanket cylinder (1) in the same peripheral speed direction as the blanket cylinder (1) at the contact surface.
A first rotating brush (3) that rotates at a peripheral speed higher than the peripheral speed of the blanket cylinder (1), and the blanket cylinder (1) below the first rotating brush (3) in the peripheral speed direction (2) of the blanket cylinder. ) And a second rotating brush (5) which is disposed so as to intersect with the first rotating brush (3) and rotates in a direction opposite to the first rotating brush (3), and the blanket cylinder (1). A rotating body (7) for removing dusts removed from the first and second rotating brushes (3, 5) and attached to the first and second rotating brushes (3, 5); and the blanket cylinder. A cover (8) which is opened facing the outer peripheral surface of (1) and covers the first and second rotating brushes (3, 5) and the rotating body (7), and communicates with the inside of the cover. An off equipped with a vacuum dust collector (10) for sucking dust scattered inside the gover. Tsu door printing machine blanket cylinder of dust removal equipment.