JPH08150705A - Washing apparatus for printing press - Google Patents

Abstract

PURPOSE: To automate the recovery of a mixture of a washing soln. used in the washing of an ink roll group and ink. CONSTITUTION: In a washing apparatus for a printing press provided with roll washing nozzles 84 supplying a washing soln. to the ink roll group 75 of a planographic printing press having an ink supply part 70, the ink roll group 75, a damping device 79, a plate cylinder 80, a blanket cylinder 81 and an impression cylinder 83, a washing soln. automatic recovery device 1 is arranged in contact with the surface of the doctor roll 76 constituting a part of the ink roll group 75.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for a printing machine.

[0002]

2. Description of the Related Art A conventional device of this type is, for example, as shown in FIG. 6, an ink supply unit 70 composed of an ink source roller 73 that contacts ink 72 in an ink fountain 71, and an ink supply unit 70 through a roll 74. Ink roll group 75 that receives the supply of ink and dampening water 7 in the dampening water tank 77
8, a plate cylinder 80 in contact with the ink roll group 75 and the dampening device 79, and the plate cylinder 80.
A cleaning liquid supply source 103 to the ink roll group 75 of the flat plate printer having a blanket cylinder 81 in contact with the blanket cylinder 81 and an impression cylinder 83 in contact with the blanket cylinder 81 via the printing paper 82.
A roll cleaning nozzle 104 connected to the ink roll group 75 and the plate cylinder 80 are removed during the roll cleaning.
A cleaning liquid is supplied from the roll cleaning nozzle 84 to the ink roll group 75 while rotating the ink roll group 75 in contact with each other, and the residual ink adhering to the surface of the ink roll group 75 is softened by the cleaning liquid, and at the same time, the ink roll group 75. The doctor blade 85 is brought into contact with the surface of the doctor roll 76 in the inside to scrape off the softened mixture of the ink and the cleaning liquid, and the scraped mixture accumulates in the recovery liquid pan 86,
It was manually removed using an ink spatula and cloth.

[0003]

The mixture of the ink and the cleaning liquid recovered in the recovery liquid pan 86 as in the above-mentioned conventional technique has a low fluidity and is inhomogeneous in that ink lumps that are not sufficiently softened are mixed. This is in a state, and in order to pour this into the discharge pipe, it is necessary to manually pour it with a spatula or the like, or to give a large amount of cleaning liquid and pour it.

However, when a spatula or the like is used, of course, it is manually performed, so that the burden on the operator is increased in time, and the operator is obliged to perform a dirty work, and when a large amount of cleaning liquid is poured, Since the ink lumps are not sufficiently dissolved, they must be deposited and solidified in the discharge pipe, and a large amount of waste must be treated. The present invention was developed to address such a problem, and an object thereof is to make it possible to automatically collect a mixture of ink and a cleaning liquid.

[0005]

The structure of the present invention for achieving the above object comprises an ink supply section, an ink roll group, and
In a printing machine cleaning device provided with a roll cleaning nozzle for supplying a cleaning liquid to an ink roll group of a flat press having a dampening device, a plate cylinder, a blanket cylinder, and an impression cylinder, a part of the ink roll group is The cleaning liquid automatic recovery device is installed in contact with the surface of the doctor roll.

Further, the cleaning liquid automatic collecting device is rotated in the outer cylinder by a doctor blade for scraping the mixture of the ink and the cleaning liquid on the doctor roll, an outer cylinder for holding the waste liquid scraped by the doctor blade. And a rotating brush roller in contact with the doctor roll. Furthermore, the cleaning liquid automatic recovery device, a doctor blade for scraping a mixture of ink and cleaning liquid on the doctor roll, a recovery liquid tank for holding waste liquid scraped by the doctor blade, and a recovery liquid tank installed in the recovery liquid tank, It is characterized in that it is formed of a jet nozzle that jets a high-speed jet jet onto a doctor blade.

Further, when the outer cylinder and the recovery liquid tank are attached to and detached from the doctor roll via a swing arm and at the time of separation, the outer cylinder and the recovery liquid tank are inclined, It is characterized in that the discharge port provided at one end in the longitudinal direction is attached so as to take a low position. Further, the cleaning liquid automatic recovery device is applicable to the blanket cylinder and the impression cylinder.

[0008]

According to the present invention, by the above means, the cleaning liquid supplied to the ink roll group softens the residual ink adhering to the surface of the ink roll group and collects the mixture of the ink and the cleaning liquid in the cleaning liquid automatic recovery device. By doing so, the roller can be cleaned without soiling the hands of the worker.

When the cleaning liquid automatic recovery device is a rotating brush in contact with the doctor roll, the lump of ink in the recovered waste liquid is completely dissolved to give fluidity, and solidification is accumulated in a pipe such as a discharge port. Is prevented. Further, the cleaning liquid automatic recovery device can be attached and detached, and when the cleaning liquid automatic recovery device is inclined so that the discharge port becomes low when the cleaning liquid automatic recovery device is removed, the recovery waste liquid can be smoothly discharged.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1. In the figure, reference numerals 70 to 84 designate the same parts as those in the conventional example shown in FIG. To do. Further, in the present invention, the cleaning liquid automatic recovery device 1 for contacting the surface of the doctor roll 76 forming a part of the ink roll group 75 to recover the waste liquid in which the ink and the cleaning liquid are mixed
The waste liquid collected by the collecting device 1 flows into the evaporator 4 through the discharge pipe 2 and the valve 3, and the waste liquid flowing into the evaporator 4 is heated by the heater 5 and further stirred by the stirrer 6. Only the cleaning liquid is evaporated, and the evaporated vapor is condensed and liquefied in the condenser 8 through the pipe 7 and the distillate tank 1 through the pipe 9.
Stored at 0. The operation from heating to storage is electrically processed by one instruction signal for regeneration, for example, at the end of the printing operation on one day or once a week.

The regenerated cleaning liquid stored in the distilling liquid tank 10 is sent to the ink roll cleaning liquid header 12 and the automatic recovery device cleaning liquid header 13 via the pump 11 for recycling. A thermocouple type thermometer (not shown) is provided at the bottom of the evaporator 4, so that the cleaning liquid is evaporated but the amount of the solvent in the ink is very small. Keep at temperature (eg 150 ° C-200 ° C). This operation is possible because the boiling point ranges of the commonly used cleaning liquid and the solvent in the ink are different as shown in FIG.

Further, a load cell (not shown) for detecting a load torque is provided on the shaft of the stirrer 6, and the increase in the viscosity of the distillation residue due to the elapse of the distillation time is detected by the load cell. When 5 is turned off, the heating is stopped to prevent the distillation residue from sticking or burning due to overheating. FIG. 2 shows a first embodiment of the cleaning liquid automatic recovery device 1 which is wet with a doctor blade 14 for scraping a mixture of ink and cleaning liquid on the doctor roll 76.
An outer cylinder 15 for holding waste liquid scraped off by the doctor blade 14, and a rotating brush roll 18 supported in the outer cylinder 15 via a bearing 16 and rotating in conjunction with a motor 17.
The rotating brush roll 18 is formed on the spiral brush roll 18a shown in FIG. 2 (a) or the radiation bundle planting brush roll 18b shown in FIG. 2 (b), and the outer cylinder 7 has a joint 19 and A cleaning liquid supply port 21 connected to the cleaning liquid header 13 for the automatic recovery device via the branch pipe 20 is provided, and a discharge port 22 is provided at one end in the longitudinal direction.

FIG. 3 shows a second embodiment of the cleaning liquid automatic recovery device 1, which comprises the doctor roll 76.
The spray is composed of a doctor blade 14 for scraping the mixture of the ink and the cleaning liquid, a collecting liquid tank 23 for holding the waste liquid scraped by the doctor blade 14, and a spray nozzle 24 installed in the collecting liquid tank 23. The nozzle 24 is connected to the cleaning liquid header 10 for the automatic recovery device via a branch pipe 20.

FIG. 4 shows a state in which the outer cylinder 15 is installed. The outer cylinder 15 is supported by swing arms 25 axially supported at both ends thereof and is connected to each swing arm 25. As shown in FIG. 4 (a), the outer cylinder 15 is positioned in parallel with the doctor roll 76 by 26, and the rotating brush roll 18 is in contact with the surface of the doctor roll 76, and the outer cylinder 15 is attached as shown in FIG. 4 (b). Cylinder 15 is doctor roll 76
The discharge port 22 provided at one end in the longitudinal direction of the outer cylinder 15 is attached so as to be attached to and detached from the detached position which is a low position. In the figure, 27 is a flexible hose and 28 is a discharge pipe.

The recovery liquid tank 23 is also detachably attached to the doctor roll 76 through swinging arms pivotally supported at both ends thereof, like the outer cylinder 15.

[0016]

Since the present invention is configured as described above, it has the following effects. In the cleaning device according to claim 1, since the cleaning liquid automatic recovery device is in contact with the surface of the doctor roll constituting a part of the ink roll group, the mixture of the residual ink and the cleaning liquid adhering to the surface of the ink roll group is the cleaning liquid. It is automatically recovered by an automatic recovery device.

In the cleaning device of the second aspect, since the cleaning liquid automatic recovery device in contact with the surface of the doctor roll is formed in the rotating brush system which rotates in contact with the surface of the doctor roll, the lump of ink in the recovered waste liquid is collected. Does not physically dissolve completely, imparts fluidity, and is not deposited and solidified in a pipe such as a discharge port. In the cleaning device according to claim 3, since the cleaning liquid automatic recovery device in contact with the surface of the doctor roll is formed in the high-speed cleaning liquid supply system for injecting a high-speed jet jet to the doctor blade, the lump of ink in the waste liquid is chemically completely removed. It melts and imparts fluidity. It does not deposit and solidify in pipes such as the shite discharge port.

In the cleaning apparatus of the fourth aspect, since the outer cylinder having the rotating brush or the recovery liquid tank having the injection nozzle is inclined so that the discharge port thereof is at a low position when it is separated from the doctor roll, the waste liquid is prevented from flowing out. Be prompt. In the cleaning apparatus of the fifth aspect, since the cleaning liquid automatic recovery apparatus is applied to the blanket cylinder and the impression cylinder, the blanket cylinder and the impression cylinder can be easily cleaned.

[Brief description of drawings]

FIG. 1 is an overall view of an embodiment of the present invention.

2A and 2B show a first embodiment of the cleaning liquid automatic recovery device in FIG. 1, where FIG. 2A is a front view and a side view of a spiral brush roll, and FIG. 2B is a front view and a side view of a bundle planting brush roll. .

3 shows a second embodiment of the cleaning liquid automatic recovery device in FIG. 1, (a) is a front view, and (b) is a side view.

4 is a perspective view showing a mounted state of the outer cylinder of FIG. 2, (a)
Is a mounted state, and (b) is a detached state.

FIG. 5 is an evaporation characteristic curve diagram of a general cleaning liquid and ink.

FIG. 6 is an overall view of a conventional example.

[Explanation of symbols]

 1 Automatic Cleaning Liquid Recovery Device 14 Doctor Blade 15 Outer Cylinder 18 Rotating Brush 22 Ejection Port 23 Recovery Liquid Tank 24 Injection Nozzle 25 Swing Arm 70 Ink Supply Part 75 Ink Roll Group 76 Doctor Roll 79 Damper 80 Plate Cylinder 81 Blanket Cylinder 83 Impression cylinder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Okuda 1-1, Kotobuki-cho, Mihara-shi, Hiroshima Mihara Rishige Engineering Co., Ltd.

Claims (5)

[Claims] 1. A roll cleaning nozzle for supplying a cleaning liquid to an ink roll group of a flat plate printer having an ink supply section, an ink roll group, a dampening device, a plate cylinder, a blanket cylinder, and an impression cylinder. In the cleaning device for a printing machine, a cleaning liquid automatic collecting device is installed in contact with a surface of a doctor roll that constitutes a part of the ink roll group. 2. The automatic cleaning liquid recovery device is configured to rotate a doctor blade for scraping a mixture of ink and cleaning liquid on the doctor roll, an outer cylinder for holding waste liquid scraped by the doctor blade, and a rotation inside the outer cylinder. The cleaning device for a printing press according to claim 1, wherein the cleaning device is formed of a rotating brush roll that is in contact with the doctor roll. 3. The cleaning liquid automatic recovery device includes a doctor blade for scraping a mixture of ink and cleaning liquid on the doctor roll, a recovery liquid tank for holding waste liquid scraped by the doctor blade, and a recovery liquid tank. The cleaning device for a printing press according to claim 1, wherein the cleaning device is installed and is formed from a jet nozzle that jets a high-speed jet jet to the doctor blade. 4. The outer cylinder and the recovery liquid tank are tilted so that the outer cylinder and the recovery liquid tank can be freely contacted with and separated from the doctor roll via a swing arm and at the time of separation. The cleaning device for a printing press according to claim 2, wherein the discharge port provided at one end in the longitudinal direction is attached so as to take a low position. 5. The cleaning device for a printing press according to claim 1, wherein the cleaning liquid automatic recovery device is applicable to the blanket cylinder and the impression cylinder.