JPH07137236A - Washing-cloth-winding device for printer-cylinder-washing device - Google Patents

Abstract

PURPOSE:To wipe a cylinder by the use of fresh washing-cloth at all times, by winding washing-cloth each time the washing-cloth is separated from the surface of the cylinder, when a washing-cloth-pressing part comes to the claw part of the impression cylinder, the notched part of the branket cyliner, in the course of washing the cylinder of a printer. CONSTITUTION:A means for applying adjusted torque to a washing-cloth-winding shaft and a means for applying constant brake at all times to a washing-cloth- unwinding shaft are provided. The washing-cloth 14 between the washing-cloth- winding roll 16 and the unwinding roll 15 is kept taut at all times. Also, when the washing-cloth-pressing part (washing device head) 19 positioned between both the rolls comes to the claw part 2 of an impression cylinder 1, it is separated from the impression cylinder 1, and the washing-cloth is wound each time it is separated from the cylinder 1, thereby wiping the impression cylinder 1 by the use of fresh washing-cloth at all times.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art When cleaning the body of a printing machine, there are a method of using a cleaning liquid and a brush, a roller, etc., and a method of spraying the cleaning liquid itself at a high pressure. However, it is necessary to clean the brush and the roller itself. However, there is a problem in processing the cleaning waste liquid after cleaning. Therefore, the method using a disposable cleaning cloth is considered to be the most suitable method because it does not have the above-mentioned problems and does not stain the surroundings of the machine. The material of the cleaning cloth is strong,
The optimum one must be selected in consideration of the penetrability and the condition of the cloth surface (fluffing condition), and for example, a nonwoven fabric is used.

[0003]

In an apparatus using such a cleaning cloth, if a dirty cleaning cloth is continuously used as it is, the dirt wiped from the cylinder may conversely adhere to the cylinder side. The long cleaning cloth is unrolled and wound up so that the dirty cleaning cloth is not used for a long time. However, dirt may remain depending on how the cleaning cloth is wound.

[0004]

SUMMARY OF THE INVENTION According to the present invention, when the cleaning cloth pressing portion reaches the claw portion of the impression cylinder or the notch portion of the blanket cylinder during cleaning, the cleaning cloth is removed every time the cleaning cloth is detached from the cylinder surface. The winder is to be wound up, and a new cleaning cloth is always used for cleaning and wiping the body. The structure is as follows.

(1) In a cylinder cleaning device for a printing press, means for adjusting the torque on the take-up shaft and means for applying a constant brake to the take-up side shaft are provided, and the take-up roll and the take-up roll are provided. The tension between the cleaning cloth and the cleaning cloth is always maintained, and the winding drive torque is controlled so that the cloth is wound every time the pressing portion of the cleaning cloth located between the rolls is separated from the cylinder during cleaning. apparatus. (2) In the cleaning device for the cylinder of the printing machine, a means for adjusting the torque on the cleaning cloth winding shaft and a means for applying a constant brake to the cleaning cloth winding side shaft are provided, and the winding roll and the winding roll. A pressing member for pressing the cleaning cloth between the delivery roll and the printing machine cylinder is provided, and the cleaning cloth between the two rolls is always kept in a tension state, and the cleaning cloth pressing portion located between the two rolls during cleaning. A winding device in which the torque of the take-up shaft is made larger than the take-up shaft braking force every time when the cleaning cloth is detached from the cylinder so that the cleaning cloth portion pressed by the cleaning cloth pressing portion against the cylinder is wound up. (3) In the cleaning device for a cylinder of a printing machine, means for adjusting the torque on the take-up shaft and means for applying a constant brake to the take-up side shaft are provided, and the take-up roll and the take-up roll are provided. The pressing part that presses the cleaning cloth between and to the cylinder of the printing machine,
It is provided so that it can be pushed out and displaced with respect to the cleaning cloth guided by the cleaning cloth guide rolls provided on both sides of the cleaning cloth, and the cleaning cloth between the take-up roll and the unwinding roll is always kept in a tension state and the guide is provided during cleaning. Each time the pressing portion of the cleaning cloth located between the rolls moves upward and separates from the cylinder, the cleaning cloth is wound around the cleaning cloth winding shaft so that the cleaning cloth does not loosen between the guide rolls, and the torque of the winding shaft is changed. A new cleaning cloth portion is positioned below the pressing portion by pulling out the cleaning cloth from the unwinding shaft side by the action of the pressing portion moving toward the cylinder again with the force greater than the winding shaft braking force. Take-up device.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of the overall structure of a cylinder cleaning device for an offset sheet machine, FIG. 2 is a side view showing the structure of a cleaning cloth device, and FIG. Timing explanatory diagram showing the relationship of voltage application to the motor,
4 is an operation flow diagram of the winding device described in FIG. 3, FIG. 5 is a timing explanatory view similar to FIG. 3 of another embodiment example, and FIG. 6 is an operation flow diagram of the winding device in FIG.

In the present embodiment, the object to be cleaned is the impression cylinder of the offset sheet-fed press. However, when the impression cylinder is cleaned, it is necessary to escape the claw portion of the cylinder, so that the pressing portion is separated from the surface of the impression cylinder by the claw portion. However, during this operation the wash cloth is rolled up and it is always possible to wash the cylinder with fresh cloth. In the case of a blanket cylinder as well, since the cylinder has a notch, the pressing portion still needs to be attached and detached, and at this time, the winding operation is performed.

As shown in FIG. 1, the blanket cylinder 3 is applied to the sheet gripped by the grip claws 2 provided on the impression cylinder 1.
The image from the plate cylinder 4 is transferred and printed through the, but since ink, paper dust, etc. gradually adhere to the impression cylinder and the blanket cylinder, it is necessary to wash them at a certain time. Devices 5 and 6 are provided, and a cleaning liquid supply box 10 including a water tank 7, an impression cylinder cleaning solvent tank 8 and a blanket cleaning solvent tank 9 is provided to the control box 11 for these cleaning devices. control panel
By the operation of 12, the cleaning liquid is supplied at a timing and the cleaning is performed.

FIG. 2 shows a cleaning device 5 for the impression cylinder 1. A cleaning device frame 13 has a cleaning cloth 14 wound around it, a cleaning cloth unwinding roll 15 with a brake, a cleaning cloth winding roll 16, and a cleaning cloth winding roll 16.
A torque motor 18 for driving the take-up roll 16 via a belt 17, a cleaning cloth pressing part 19, and guide rolls 20, 20 for guiding the cleaning cloth 14 to the pressing part 19 are provided on both sides of the cleaning cloth pressing part 19. There is.

The cleaning cloth pressing portion 19 is provided with a moving member 21 that can move toward the impression cylinder 1, and a pressing driving portion is appropriately provided.
Up and down movement is controlled by 22. A blade 23 for pressing the cleaning cloth 14 against the impression cylinder 1 is formed on the cleaning cloth unwinding roll 15 side of the moving member 21, and a cleaning cloth guide portion 24 is formed on the winding roll 16 side. The blade 23 and the guide portion 24 are provided. A pad 25 for pressing the cleaning cloth 14 against the impression cylinder 1 is provided between the pad and.

The cleaning cloth 14 drawn out from the cleaning cloth unwinding roll 15 passes through the guide roll 20, the lower surface of the cleaning cloth pressing portion 19, and is wound up on the cleaning cloth winding roll 16 through another guide roll 20. At this time, the blade 23 formed on the pressing portion 19 strongly presses the cleaning cloth against the body to scrape off the dirt, and the pad 25 wipes off the dirt. In addition, reference numeral 26 is a cleaning liquid injection nozzle, and the blade 24
The cleaning liquid is sprayed toward the side, and the cleaning liquid is supplied from the back surface of the cleaning cloth.

By the way, the cleaning cloth unwinding roll 15 and the take-up roll 16 are provided with means for applying a constant brake to the unwinding side shaft and means for adjusting the torque on the winding shaft. The time when the cleaning cloth 14 between the roll 16 and the unwinding roll 15 is always kept in a tension state, and the pressing portion 19 of the cleaning cloth 14 located between both rolls during cleaning is separated from the body 1 by the gripping claw 2 part. On the winding roll of the cleaning cloth that has become dirty due to the body cleaning.
It is necessary to wind it up on the 16 side and clean it with a clean cleaning cloth.

To this end, as a winding means, a torque motor 18 is attached to the shaft of the winding roll 16 via a belt 17 and a spring type brake is attached to the shaft of the winding roll 15.

Both the torque motor and the brake have a structure in which the force can be adjusted. The hoisting torque and the brake are set to be balanced, and the washing cloth is kept in a state in which a constant tension is not applied to cause the slack to occur. The cleaning cloth pressing portion 19 winds up the cleaning cloth corresponding to the nip width at a time when it is separated from the target cylinder, and a new surface of the cleaning cloth is supplied.

As a means for hoisting, an air cylinder can be hoisted by a crank mechanism using an operation image like a wheel of a locomotive in addition to a motor, but an electric torque motor which can be easily adjusted is used. .

If the cleaning cloth is not always used in a new state, that is, if the cleaning cloth once cleaned is used, the surface of the cylinder may be soiled again, which is not preferable. Therefore, always use a new cleaning cloth. Need to be washed. On the contrary, even if the cleaning cloth is washed with a new cleaning cloth, if it is unnecessarily wound too much, the use efficiency of the cleaning cloth deteriorates. Therefore, it is necessary to always perform a sequence operation with a new cleaning cloth and a minimum amount of cloth used.

During normal cleaning, the cleaning liquid is sprayed onto the cleaning cloth, and the soiled impression cylinder surface is wiped off with a damp cleaning cloth. Finally, the final finish is performed by dry wiping. Even in the case of this finish cleaning, the body is always wiped with a new cleaning cloth.

As a cleaning mode of the cleaning device shown in FIG. 2, cleaning is performed by vertically moving the cleaning cloth pressing portion (cleaning device head) 19 pressed against the surface of the impression cylinder 1 together with the cleaning device frame 13. A method of cleaning with the cloth 14 and a cleaning cloth pressing portion 19 with the cleaning device frame 13 as it is
There is a method in which the pressing drive unit 22 releases the pressing on the cleaning cloth between the guide rolls 20, 20.

In the system in which the cleaning cloth pressing portion 19 is moved up and down together with the cleaning device frame 13 to perform cleaning by the cleaning cloth 14, as shown in FIG.
The drive timing of is detected by a signal from the rotary position detecting encoder 27 (see FIG. 1) attached to the shaft of the impression cylinder 1 at the time when the impression cylinder (cylinder) gripping claw escape timing is detected. The voltage applied to the torque motor 18 after being delayed by Δt is increased by α for the length of time for winding the length (nip length) used for cleaning the body of the cleaning cloth, and is wound around the winding roll 16. To do. In this case, if the amount of voltage increase is increased, the winding is performed rapidly, and the winding time can be shortened.

In the above embodiment, since it is not necessary to change the mutual positional relationship between the cleaning cloth pressing portion 19 and the guide rolls 20, 20, it is only necessary to displace the frame 13 with respect to the impression cylinder 1. The cleaning and winding operation by such a cleaning device is as shown in the flowchart of FIG.

The torque applied to the take-up roll so that a constant tension is applied between the take-up roll 15 and the take-up roll 16 is considered in consideration of the frictional force generated when the cleaning cloth is pressed against the impression cylinder surface. Prevents the cloth from sagging and the cleaning cloth is separated from the surface of the impression cylinder so that the frictional resistance disappears, so that the cleaning cloth is automatically taken up from the take-up roll to the take-up roll side with the same take-up torque. If so, it is possible to wind the dirty cleaning cloth portion onto the take-up roll side with a simple structure.

Further, with the cleaning device frame 13 as it is,
In the system in which the cleaning cloth pressing part (cleaning device head) 19 is released by pressing the cleaning cloth between the guide rolls 20 by the pressing drive part 22, the cleaning cloth pressing part is separated from each other as shown in FIG.
Blade 23, pad 25, guide part
The cleaning cloth pressing portion 19 provided with the moving member 21 forming 24 can be moved forward and backward with respect to the surface of the impression cylinder 1 by the pressing drive portion 22.

In this case, since the gripping claws 2 escape, the cleaning cloth slackened between the guide rolls 20 and 20 due to the lifting and lifting of the cleaning cloth pressing portion 19 from the surface of the impression cylinder 1 is a torque motor.
It is wound around a winding roll 16 driven by 18, and if necessary, only the length used for cleaning is wound up, and then between the guide rolls 20, 20 provided on both sides of the cleaning cloth pressing portion 19. By adjusting the torque to the winding roll 16 and pushing down the cleaning cloth pressing portion 19 so that the cleaning cloth stretched over the roll is not fed out from the winding roll 16 side, but is drawn out from the winding roll 15 side. A new cleaning cloth portion used for cleaning the impression cylinder is pulled out to the lower surface of the cleaning cloth pressing portion 19.

FIG. 5 shows a timing chart in this embodiment, and FIG. 6 shows a flowchart thereof.

Further, when the cleaning cloth is wiped off the impression cylinder, in order to prevent the cleaning cloth from being fed out from the take-up roll 16 side due to the rotation of the impression cylinder, a one-way is provided between the torque motor 18 and the winding shaft. A clutch may be provided.

[0026]

According to the present invention, when cleaning the cylinder of a printing press, at the same time as the cleaning cloth is released from the surface of the cylinder at the time of releasing the nail, the dirty cleaning cloth used for cleaning is wound up. Then, since the body wash is performed again with a clean wash cloth, the wash work is always performed with a clean wash cloth. By moving only the cleaning cloth, the cleaning cloth can be used efficiently.

Further, the tension adjustment for the cleaning cloth can be accurately performed by adjusting the torque of the torque motor, and moreover, the control suitable for the necessary amount of the cleaning cloth to be drawn from the unwinding roll can be accurately performed.

[Brief description of drawings]

FIG. 1 is an overall explanatory diagram showing a drum cleaning device of an offset sheet-fed machine.

FIG. 2 is a side view showing the configuration of the cleaning device shown in FIG.

FIG. 3 is a timing explanatory diagram showing the relationship between the separation from the surface of the cylinder (cylinder) to be cleaned and the voltage application to the torque motor of the cleaning device.

FIG. 4 is an operation flowchart of the cleaning device corresponding to FIG.

FIG. 5 is a timing explanatory view showing the relationship between the separation from the surface of the cylinder (cylinder) to be cleaned and the voltage application to the torque motor of the cleaning device according to another embodiment.

6 is an operation flowchart of the cleaning apparatus corresponding to FIG.

[Explanation of symbols]

 1 impression cylinder 2 gripping claw 3 blanket cylinder 4 plate cylinder 5, 6 cleaning device 13 cleaning device frame 14 cleaning cloth 15 unwinding roll 16 winding roll 18 torque motor 19 cleaning cloth pressing part 20 guide roll 21 moving member 22 pressing drive 23 Blade 24 Guide 25 Pad 26 Cleaning liquid supply nozzle 27 Rotation position detection encoder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Isao Kawakami 6-37-2 Akabane Nishi, Kita-ku, Tokyo Within DNK Inc. (72) Inventor Hitoshi Otsuka 6-chome, Akabane Nishi, Kita-ku, Tokyo No. 37 No. 2 Stock Company DNK

Claims (3)

[Claims] 1. A cylinder cleaning device for a printing press, comprising means for adjusting a torque on a cleaning cloth winding shaft and means for applying a constant brake to a cleaning cloth winding side shaft, and a winding roll and a winding roll. The cleaning cloth between the roll and the roll was always kept in tension, and the winding drive torque was controlled so that the cloth was wound up every time the pressing part of the cleaning cloth located between the rolls was separated from the cylinder during cleaning. A cleaning cloth winding device for a printing press cylinder cleaning device. 2. A cylinder cleaning device for a printing press, comprising means for adjusting a torque on a cleaning cloth winding shaft and means for applying a constant brake to a cleaning cloth winding side shaft, and the winding roll. A pressing member that presses the cleaning cloth between the roll and the unwinding roll against the printing machine cylinder is provided, and the cleaning cloth between the two rolls is always held in a tension state, and the cleaning cloth located between the two rolls during cleaning is Every time the pressing part is detached from the cylinder, the torque of the winding shaft is made larger than the unwinding side shaft braking force to wind up the cleaning cloth part pressed against the cylinder by the cleaning cloth pressing part. A cleaning cloth winding device for a printing machine cylinder cleaning device. 3. A cylinder cleaning device for a printing press, comprising means for adjusting torque on a winding shaft and means for applying a constant brake to a winding shaft, and the winding roll and winding device. A pressing portion for pressing the cleaning cloth between the take-out roll and the cylinder of the printing machine is provided so as to be able to be pushed and displaced with respect to the cleaning cloth guided by the cleaning cloth guide rolls provided on both sides thereof, and the take-up roll and the unwinding roll. The cleaning cloth with the rolls is always kept in a tension state, and each time the pressing portion of the cleaning cloth located between the guide rolls moves upward and separates from the cylinder during cleaning, the cleaning cloth is removed between the guide rolls. The cloth is wound around the cloth take-up shaft so that it does not become loose, and the pressing part moves toward the cylinder again with the torque of the take-up shaft being larger than the braking force of the take-out side shaft. By pulling out the cloth,
A cleaning cloth winding device for a printing machine cylinder cleaning device, characterized in that a new cleaning cloth portion is positioned below the pressing portion.