JPH08142315A - Blanket cleaning device for printing machine - Google Patents

Abstract

PURPOSE: To provide a device for cleaning and removing attachments such as paper dust and ink which are particularly attached to a blanket cylinder of an offset press. CONSTITUTION: A brush roller 7 rotates being supported by a support axis having an axis parallel with a blanket cylinder 12 of a printing machine and has a length to cover the whole length of the blanket cylinder. An injection means 9 is arranged in the longitudinal direction of the brush roller 7 and is equipped with a large number of nozzles 8 which are opening by facing the brush roller 7. A reciprocation section 10 makes the injection means 9 and the cleaning brush roller 7 touch and separate from the blanket cylinder 12. A water tank as a preliminary pressure tank communicating with each nozzle 8 of the injection means 9 through each separate tube passage, a cleaning solution tank, and solenoid valves arranged in each tube passage to be opened and closed alternately are also provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cleaning and removing deposits such as paper powder and ink deposited on a blanket cylinder of an offset printing machine.

[0002]

2. Description of the Related Art Since paper dust, ink and the like adhere to the blanket cylinder of a printing machine, it is required to remove them in order to maintain the quality of the printed matter.

For this reason, it is necessary to perform maintenance work for removing the above-mentioned deposits while continuing the printing work or at the end of the printing work. Conventionally, for example, the printing machine is stopped and the cleaning is manually performed. It is necessary to take time and labor, which causes a problem such as a decrease in efficiency of printing work.

[0004]

DISCLOSURE OF THE INVENTION The present invention eliminates the trouble of wiping that hinders the efficiency of printing work as described above,
It is an object of the present invention to provide a device that enables quick and reliable cleaning work.

[0005]

According to the present invention, there is provided a brush roller having a length which is supported by a support shaft having an axis parallel to a blanket cylinder of a printing machine and rotates to cover the entire length of the blanket cylinder. , An injection means having a large number of nozzles arranged in the lengthwise direction of the brush roller and opening toward the brush roller, and moving the injection means and the brush roller toward and away from the blanket cylinder. A reciprocating member, a water tank and a cleaning solvent tank as a preload tank that communicates with the nozzles of the injection means via separate conduits, and a solenoid valve that is provided in the conduits and is alternately opened and closed. And a blanket cleaning device for a printing machine, which is provided with, and, when the blanket cleaning device is attached, paper dust, ink or the like attached to the brush roller by sliding contact with the brush roller. It is proposed to provide a scraping means such as a scraper for removing an object, to form a support shaft of the brush roller with a carbon material, and to provide a valve member for adjusting the injection amount for each nozzle. To do.

[0006]

Operation When the surface of the blanket cylinder of the printing machine has a certain amount of adhered substances such as paper powder and ink, the rotating brush roller is brought into contact with the blanket cylinder by the reciprocating part. A cleaning solvent and water are alternately sprayed from the nozzle to the brush roller according to a program determined by a controller, and the deposits on the blanket cylinder are transferred to the brush roller, The foreign matter is scraped off from the brush roller by the scraping means.

At this time, by appropriately setting the operation program by the control device, it is possible to freely select the cycle of the forward / backward movement of the brush roller, the injection timing of water and the cleaning solvent, the time, the injection amount, and the like. To do.

[0008]

1 and 2 are sectional views showing a main part of a cleaning apparatus according to the present invention, in which a movable table 4 which can be moved back and forth along rails 2 and 3 on an underframe 1 has a hydraulic model. A rotor 5, a brush roller 7 that is transmitted from the hydraulic motor 5 through a gear train 6 and is driven to rotate, and a large number of sprayers for spraying water and a cleaning solvent, which will be described later, onto the brush roller 7. Injecting means 9 in which nozzles 8 (only one of which is shown in the drawing) are arranged in a row, an air cylinder 10 as a reciprocating part for moving the movable base 4 forward and backward, and a lower surface of the brush roller 7. A scraping means 11 such as a scraper that comes into sliding contact with the portion is mainly mounted.

Below the scraping means 11, a blanket cylinder 12 and a brush roller are installed along with a cleaning operation described later.
A tray 13 is provided for receiving the deposit transferred to the la 7 and scraped by the scraping means 11.

FIG. 3 is a conceptual diagram showing the relationship between the brush roller 7 and the jetting means 9, wherein the jetting means is applied to the brush roller 7 supported by a support shaft 14 made of a carbon material. A large number of nozzles 8a, 8b, ... 8n forming 9 are arranged in a row over substantially the entire length of the brush roller 7.

8n are shown in FIG. 3 (in this figure, 8n is 8h, and 8 nozzles are provided). 8h are provided with flow rate adjusting valves 15a to 15h, respectively. Pipe lines 18 and 19 from a water tank 16 and a cleaning solvent tank 17 which are respectively pressurized and are configured as a pre-pressure tank, are respectively provided with the nozzles 8a to 8h. It is connected to the flow rate adjusting valves 15a to 15h of 8h.

Solenoid valves 20 and 21 are provided in the pipes 18 and 19, respectively, and according to a program installed in a control device (not shown), these solenoid valves 20 and 21 are timely controlled. Alternate opening and closing and control of the flow rate adjusting valves 15a to 15h are performed.

Returning to FIGS. 1 and 2, while the brush roller 7 is rotationally driven by the hydraulic motor 5 via the gear train 6,
The movable base 4 is railed by the air cylinder 10 to the rails 2, 3
Along with the blanket cylinder 12 by alternately opening and closing the solenoid valves 20 and 21 at this time, the pressurized water or cleaning solvent in the water tank 16 or cleaning solvent tank 17 is pressure-fed. The nozzles 8a to 8h are alternately jetted toward the brush roller 7.

By the water and the cleaning solvent supplied to the brush roller 7, adhered substances such as paper powder and ink adhered to the surface of the blanket cylinder 12 are transferred to the brush roller 7, The kimono is scraped off by the scraping means 11, and the saucer 1
It collects to 3.

When the cleaning of the blanket cylinder 12 is completed,
The supply of water and the cleaning solvent is stopped, and the movable table 4 is retracted by the action of the air cylinder 10 to move the brush roller 7
Is separated from the blanket cylinder 12 and the rotation is stopped.

The cleaning device of the present invention can be practically used for cleaning the brush roller 7 itself.

[0017]

By using the apparatus of the present invention, an appropriate amount of water or a cleaning solvent can be supplied to the brush roller, and the water or the solvent can be evenly sprayed to the blanket movement, so that the cleaning effect can be improved. Since it can be used and a small amount of water or cleaning solvent is sufficient, it does not require a waste liquid treatment function, and the paper dust, ink, etc. collected in the pan should be removed every half a month or once a month. The maintenance time can be shortened, and the support shaft of the brush roller is made of a carbon material, so that the support shaft can be made lightweight and can withstand high speed driving.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a cleaning device of the present invention.

FIG. 2 is a conceptual diagram showing a simplified part of FIG.

FIG. 3 is a view showing a relationship between a brush roller and an injection device, and showing paths of water for cleaning and a cleaning solvent.

[Explanation of symbols]

 7 Brush Roller 8a-8n Nozzle 9 Injection Means 10 Reciprocating Portion (Air Cylinder) 12 Blanket Cylinder 16 Water Tank 17 Cleaning Solvent Tank 18,19 Pipeline 20,21 Solenoid Valve

Claims (5)

[Claims] 1. A brush roller having a length that covers the entire length of the blanket cylinder, which is supported by a support shaft having an axis parallel to the blanket cylinder of a printing machine, and rotates, and a brush roller in the longitudinal direction of the brush roller. Injecting means provided with a large number of nozzles arranged and opening toward the brush roller, a reciprocating portion for moving the injecting means and the brush roller toward and away from the blanket cylinder, and each of the injecting means. A blanket cleaning device for a printing machine, comprising: a water tank and a cleaning solvent tank which communicate with the nozzle through separate pipes; and electromagnetic valves which are provided in the respective pipes and which are alternately opened and closed. . 2. The printing machine according to claim 1, further comprising scraping means such as a scraper for slidingly contacting the brush roller to remove foreign matters such as paper powder and ink adhered on the brush roller. Blanket cleaning equipment. 3. The blanket cleaning device for a printing press according to claim 1, wherein the support shaft of the brush roller is made of a carbon material. 4. The blanket cleaning device according to claim 1, further comprising a valve member for adjusting the injection amount for each of the nozzles. 5. The blanket cleaning device for a printing press according to claim 1, wherein the water tank and the cleaning solvent tank are pressurized pre-pressurized tanks.