JP3138319B2 - Cleaning liquid supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning liquid supply device which is supplied to a printing press cylinder when cleaning the cylinder.

[0002]

2. Description of the Related Art In a printer cylinder cleaning device, water for cleaning paper powder and the like, and a solvent for cleaning ink and the like are used as a cleaning liquid. The cleaning liquid is supplied to the printer cylinder. The cleaning is performed by a pump from a washing liquid tank.

In order to clean the cylinder of a printing press, it is necessary to always supply a required constant amount of cleaning liquid, and it is necessary to adjust the amount of cleaning liquid as needed. This is because if the amount of the washing liquid is small, washing is not sufficiently performed, and if the amount is too large, the cylinder of the printing press and other precision parts are unnecessarily wetted, which adversely affects printing accuracy. Further, since it is necessary to adjust the amount of the cleaning liquid depending on the degree of contamination, the required amount of the cleaning liquid must be supplied with a required amount with high precision.

Further, if the cleaning liquid sent to the body cleaning liquid supply pipe connected to the nozzle is left in the pipe, the cleaning liquid may drop from the nozzle during periods other than the cleaning period, which adversely affects the printing environment. Therefore, it is necessary that the fuel be ejected from the pipe through the nozzle without leaving any excess.

That is, if a small amount of liquid remains in the pipes or nozzles, the liquid may adhere directly or indirectly to the printed matter during printing, possibly causing deterioration in print quality.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a cleaning liquid supply apparatus which can accurately control the amount of cleaning liquid supplied to the cylinder of a printing press and which does not leave cleaning liquid in piping or nozzles. is there.

[0007]

According to the present invention, there is provided a closed cleaning liquid tank and an air source for applying a constant pressure to the liquid surface thereof, and a cleaning liquid supply pipe connected to a nozzle facing the cylinder to be cleaned. A cleaning liquid pipe from the cleaning liquid tank is connected via an automatic supply valve, and the body cleaning liquid is supplied.
Supply piping is through pressure regulating valve, compressed air piping and automatic air valve
To the air source, and furthermore, to detect the rotational phase of the cylinder to be cleaned.
An automatic cleaning liquid supply valve connected to a sensing device;
A control unit for controlling opening and closing of the automatic valve;
When the detecting device detects the rotation phase of the specified cylinder to be cleaned
The control unit is configured to close the automatic air valve and
Open the cleaning solution supply automatic valve for a certain period of time to
Supply from the closed cleaning liquid tank into the body cleaning liquid supply pipe,
After opening the air automatic valve, open the compressed air piping from the air source.
Supply compressed air into the body cleaning liquid supply pipe
Compress air so that no cleaning liquid remains in the supply pipe.
By configuring to eject the cleaning liquid supplied to the cylinder in the cleaning liquid supply pipe to the cleaning cloth surface from a nozzle by A, it is intended to solve the above problems.

[0008]

FIG. 1 schematically shows an embodiment according to the present invention, in which two types of cleaning liquids are used, and FIG. 2 is a side view of a generally used cleaning apparatus main body.
FIG. 2 shows a state in which an impression cylinder cleaning device is attached to a sheet-fed printing press. A cleaning cloth unwinding section 4 and a cleaning cloth take-up section 5 are mounted on a machine frame 3 of the cleaning apparatus main body 2 to unwind the cleaning cloth. The cleaning cloth 6 fed from the section 4 is configured to be wound around the cleaning cloth winding section 5, and a pad 7 is provided between the pressing section 8 and the surface of the impression cylinder 1.
And the cleaning liquid is ejected and supplied from the nozzle 9. In the drawing, reference numeral 10 denotes a pad 7
A cleaning cloth pressing blade 11 pressed against the impression cylinder is a claw provided on the impression cylinder 1 for gripping a sheet.

As shown in FIG. 1, there is provided a tubular nozzle 12 facing the impression cylinder 1 and having small holes arranged in a row so as to spray a cleaning liquid on the surface of the cleaning cloth. Is connected to a cleaning liquid supply pipe 13 for supplying a cleaning liquid. The cleaning liquid supply pipe 13 is connected to the automatic valves 14 and 1 respectively.
The first cleaning liquid tank 17 and the second cleaning liquid tank 1 via 5 and 16
8 and an air source 19.

First cleaning liquid tank 17 and second cleaning liquid tank
Reference numeral 18 denotes a closed tank, in which different cleaning liquids are stored so that they can be used according to the contamination of the impression cylinder 1. For example, the first cleaning liquid tank 17 is filled with water as a cleaning liquid, and used for cleaning water-soluble substances such as paper powder, and the second cleaning liquid tank 18 is used for inks and the like that cannot be dissolved with water. Put the cleaning solution
These are used alternately as needed.

When the cleaning liquid is ejected from the cleaning liquid tank through the tubular nozzle 12, in the apparatus of the present invention, an air source is supplied to the cleaning liquid tank in order to supply the cleaning liquid amount accurately.
It is configured to take advantage of air pressures greater than 19. That is,
The first cleaning liquid tank 17 from the air source 19 via the pressure regulating valve 20
Further, a constant air pressure is applied to the first cleaning liquid tank 18 from the air source 19 via the pressure regulating valve 21, and the cleaning liquid is supplied from the respective cleaning liquid tanks 17 and 18 via the automatic valves 14 and 15, respectively. 13 to be supplied.
(For example, the washing liquid amount is 5 to 10 c for a drum length of 2 to 3 m.
c)

The cleaning liquid supplied to the cleaning liquid supply pipe 13 is
The airflow is controlled by the automatic valve 16 from the air source 19 via the pressure regulating valve 22, and is pushed out from the small hole of the tubular nozzle 12 by the airflow to be ejected to the washing cloth surface.

Incidentally, in order to control the supply timing of the cleaning liquid supplied to the impression cylinder 1, the impression cylinder 1 is provided with a rotation phase detecting device (rotary encoder) 23. And the supply amount of cleaning liquid, air source
Automatic valves 14, 15, and for controlling the airflow from 19 and
A control device 24 for controlling 16 is provided.

Since the cleaning liquid supply apparatus according to the present invention is configured as described above, the cleaning liquid supply timing and the supply liquid amount are determined by the opening / closing timing and the opening / closing time of the automatic valves 14, 15, 16; It is determined by the signal of the rotational phase detecting device (encoder) 23 attached to the shaft of and the timer of the control device 24.

The operation sequence of the present apparatus is as follows. When starting the cleaning device switches on the impression cylinder 1 is rotating (slow) encoder 23 detects the rotational phase of a predetermined impression cylinder 1, and sends a signal to the controller 24. The cleaning liquid supply automatic valves 14, 1 by an electric signal (ON) from the control device 24.
5 opens. Electric signal from control device 24 (OFF)
Thereby, the cleaning liquid supply automatic valves 14 and 15 are closed. ( Control equipment
24 ). The automatic air valve 16 is opened by an electric signal (ON) from the control device 24 . (Tubular nozzle 12 cleaning <br/> solution for a certain amount supplied to the cleaning liquid supply pipe 13 between the Toto, the compressed air from the air source 19
Squirted from. The automatic air valve 16 is closed by an electric signal (OFF) from the control device 24 . ( Control device
According to 24 timers) cleaning operation the cleaning device main body is operated is performed. Thereafter, the cleaning liquid supply operation and the operation of the cleaning device main body are linked, and the cleaning is continued.

[0016]

According to the present invention, a closed container is used as a cleaning liquid tank, an automatic valve is opened for a required time, and a predetermined amount of the cleaning liquid is accurately sent out using a constant air pressure.
After the supply residue is left in the cleaning liquid supply pipe, this is ejected from the nozzle to the impression cylinder with compressed air, so that a fixed amount of cleaning liquid can be easily and reliably supplied, and from the cleaning liquid tank. The cleaning liquid supplied into the cleaning liquid supply pipe is all ejected from the nozzle by the compressed air, so that the cleaning liquid does not remain in the tubular nozzle.

Therefore, since the cleaning liquid does not remain in the pipes and nozzles, there is no danger of the cleaning liquid dropping from the nozzles during the cleaning period, and no adverse effect on the printing environment occurs. Further, since a necessary amount of the cleaning liquid can be surely supplied, the cleaning operation can be completely performed.

[Brief description of the drawings]

FIG. 1 shows an embodiment according to the present invention as a schematic configuration diagram.

FIG. 2 is a side view of a commonly used cleaning device main body.

[Explanation of symbols]

 1 Pressure Cylinder 2 Cleaning Body 6 Cleaning Cloth 7 Pat 12 Tubular Nozzle 13 Cleaning Liquid Supply Pipe 14 Automatic Valve 15 Automatic Valve 16 Automatic Valve 17 Closed Cleaning Liquid Tank 18 Closed Cleaning Liquid Tank 19 Air Source 20 Pressure Control Valve 21 Pressure Control Valve 22 Pressure Control Valve 23 Rotational phase detector (encoder) 24 Controller

Continuation of the front page (72) Inventor Shunji Name 1-1-1, Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd. (56) References JP-U 2-133340 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B41F 35/00-35/06

Claims (1)

(57) [Claims] In a cylinder cleaning device for a printing press, a closed cleaning liquid tank and an air source for applying a constant pressure to the liquid surface thereof are provided, and a cylinder cleaning liquid supply pipe connected to a nozzle facing the cylinder to be cleaned is provided. with connecting washing liquid pipe from the cleaning tank through the cleaning liquid supply automatic valve, said Doarai
Purified liquid supply piping is pressure regulating valve, compressed air piping and air automatic
Connected to the air source via a valve, and further rotated the cylinder to be cleaned
The cleaning liquid supply automatic valve connected to a phase detection device and
A control unit for controlling opening and closing of the automatic air valve;
The rotation phase detection device detects the rotation phase of the specified cylinder to be cleaned.
When the control unit, in the state where the automatic air valve is closed,
Open the cleaning liquid supply automatic valve for a certain period of time and
From the closed cleaning liquid tank into the body cleaning liquid supply pipe,
Then, open the automatic air valve and connect the compressed air piping from the air source.
Compressed air is supplied into the body cleaning liquid supply pipe through the
Make sure that the cleaning liquid does not remain in the liquid supply piping.
A cleaning liquid supply device configured to discharge a cleaning liquid supplied into the body cleaning liquid supply pipe by compressed air from a nozzle onto a cleaning cloth surface.