JPS6337944A - Apparatus for washing cylinder of printing press - Google Patents

Abstract

PURPOSE:To wash the vicinity of a projection (the pawl of an impression cylinder) even when said projection is present without increasing the output of a drive system, by contacting washing cloth with the surface of a cylinder under pressure by a blade used in place of a conventional pad. CONSTITUTION:The title apparatus is constituted of washing cloth 1 for directly removing the contaminant of a cylinder 6 to be washed, a magazine roll 2 from which the washing cloth 1 is unwound stepwise, a take-up roll 3 for taking up the washing cloth 1 and holding the same, a blade 8 contacting the washing cloth with the cylinder 6 to be washed under pressure, the nozzle 5 provided to a washing liquid supply pipe 4 as a moistening means in the vicinity of the washing cloth 1, a holder 9 for holding the blade 8 and the washing liquid supply pipe 4 and a frame body 10 for supporting the magazine roll 2, the take-up roll 3 and the holder 9. Since the contact area of the washing cloth with the cylinder to be washed is small by utilizing the blade as a pressure contact device (means) and, as a result, friction can be reduced, a take-up mechanism becomes simple and, even when a projection (pawl part) is provided to the cylinder to be washed like an impression cylinder, even the pawl part can be washed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cleaning device for a cylinder of a printing press.

[Conventional technology]

An apparatus for cleaning the cylinder of a printing press using a cleaning cloth, for example, as shown in FIG. A device is provided that cleans the printing press cylinder while supplying cleaning liquid to the cloth, pressing the cleaning cloth 1 against the printing machine @6 with a pad 7, rotating the printing press W146, and moving the cleaning cloth 1 step by step. Are known. That is, to explain it roughly, there is a cleaning cloth that directly removes dirt from the cylinder to be cleaned, a magazine roll from which the cleaning cloth is progressively unwound, a means for moistening the cleaning cloth with a cleaning liquid, and a means for moistening the cleaning cloth with a cleaning liquid. It consists of a means for crimping, a roll for winding up the used cleaning cloth, and a drive system for moving the cleaning cloth step by step. Conventionally, as a crimping device, a cushion such as a sponge, an air pad using air pressure, and a crimping roller have been used.

[The interlayer point that the invention attempts to solve]

In the conventional crimping device described above, when a cushion such as a sponge, an air pad that uses air pressure, a crimping roller, etc. are used, the crimping area between the cleaning cloth and the cleaning cylinder becomes large due to the nip width. ■ If you try to move the cleaning cloth while it is in contact with the cylinder to be cleaned, it will require a very large driving force, and it will be necessary to apply more tension to the cleaning cloth than necessary, so strong reinforcement, Due to reasons such as strengthening the drive system, the entire device must become larger, heavier, and more expensive.

■ When attempting to remove and move the cleaning cloth from the cylinder to be cleaned, the crimping device must be moved each time, making the entire device complicated and inevitably larger, heavier, and more expensive. Moreover, since there is a time when the cleaning cloth is not pressed onto the cylinder to be cleaned, cleaning takes a long time.

■ If the cylinder to be cleaned has protrusions such as impression cylinder claws, cleaning the vicinity of the protrusions is the main task.

There were other problems.

[Means for solving problems]

In the printing press cylinder cleaning device according to the present invention, since a blade is used as the crimping device, the crimping area is small. requires a sufficiently small driving force compared to conventional technology, making the entire device small, lightweight, simple,
Although it is inexpensive, it can be moved in reverse while the cleaning cloth is crimped, so it has the same or better cleaning effect than conventional devices, and can shorten the cleaning time.

■ Even if there are protrusions on the cylinder to be cleaned (such as claws on the impression cylinder),
Cleaning can be performed up to the vicinity of the protrusion.

It becomes like this.

[Effect]

In the present invention, the cleaning cloth is brought into pressure contact with the barrel surface by a blade instead of the conventional pad, so even if the contact pressure is increased, the contact area is small, so there is no need to increase the output of the drive system. In addition, even if there is a protrusion (such as a claw on an impression cylinder), the contact area is narrow, so it is possible to clean the vicinity of the protrusion, and no cleaning residue is left on the surface.

(Example〕 Embodiments of the invention will be described with reference to the drawings.

FIG. 1 is a side sectional view of a cleaning device according to the present invention, and FIG. 2 is a perspective view thereof. The magazine roll 2 and take-up roll 3 of the cleaning cloth 1 are constructed similarly to those of the conventional device. A blade 8 is used instead of a pad as a crimping device. That is, the cleaning device according to the present invention includes a cleaning cloth 1 for directly removing dirt from a cylinder 6 to be cleaned, a magazine roll 2 from which the cleaning cloth 1 is unwound in a stepwise manner, and a magazine roll 2 for winding up and unwinding the cleaning cloth. A winding roll 3 for holding the cleaning cloth, a blade 8 for pressing the cleaning cloth onto the cylinder to be cleaned, and a nozzle 5 provided in the cleaning liquid supply pipe 4 as a means for moistening the vicinity of the cleaning cloth.
It is composed of a holder 9 for holding the blade 8 and the cleaning liquid supply pipe 4, and a frame 10 for supporting the magazine roll 2, the take-up roll 3, and the holder 9. In addition, this cleaning device also includes an air cylinder as a moving system for separating the device from the cylinder to be cleaned, and a stepwise movement of the cleaning cloth to prevent contact with the cylinder to be cleaned during high-speed rotation. A one-way clutch and an air cylinder are used to move the paper and wind it up, but since the mechanism is well known, illustration thereof is omitted. The movement of the cleaning cloth 1 into pressure contact with the body 6 by the blade 8 may be performed by any suitable means.

A concrete explanation of each component of this embodiment is as follows.

The cleaning cloth has a thickness of about 0.3 mm and has a solvent retention ability, and the material used is a nonwoven fabric having lipophilic and hydrophilic properties. The amount of cleaning cloth consumed in one cleaning is about 150 mm.

It is equipped with a mechanism that allows the magazine roll cloth to be easily attached and detached while still being rolled, and has a brake mechanism to prevent the cleaning cloth from loosening when it is progressively unwound from the magazine roll.

The used winding roll can be easily attached and detached, and the winding direction is set in a direction opposite to the rotation of the cylinder to be cleaned.

MC nylon or the like was used as a material that would not be affected by the solvent used in the blade, and the thickness was 5 m and the pressing force was 375 g/d. In order to efficiently press the cleaning cloth onto the body to be cleaned, the tip was angled at 45 degrees.

Cleaning Liquid Injection Nozzle Two liquids, water and a solvent, were used as the cleaning liquid, and nozzles were set for each. The injection amount is enough to moisten the cleaning cloth (width 1362 mm)
Spray evenly on the blade (on average 20cc) at a time.

Blade holder Holds the blade and always presses the blade with a cleaning cloth at a constant pressure and angle. Also, the cleaning liquid nozzle is held and the cleaning liquid is injected onto the cleaning cloth at a fixed angle.

〔Effect of the invention〕

In the present invention, by using a blade as the crimping device (means), the contact area between the cleaning cloth and the body to be cleaned is small, and therefore the friction can be reduced, so that the following effects are achieved.

The cleaning cloth can be wound up without applying tension to the cleaning cloth more than necessary, which simplifies the winding mechanism.

Since the cleaning cloth can be pulled in the direction opposite to the rotation of the cylinder to be cleaned, the cleaning effect is high.

When winding up the cleaning cloth, there is no need to separate the crimping device from the cylinder to be cleaned, so cleaning does not take much time.

Since the crimping part is smaller than in the conventional method, the cleaning device can be made smaller and lighter in weight than the conventional device, and is also inexpensive. Even if the cylinder to be cleaned has a protrusion (claw portion) such as an impression cylinder, it is possible not only to clean up to the edge of the nail, but also to simplify the pressure application device since the contact area is small.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a cleaning device according to the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is a side sectional view showing a conventional example. 1...-Cleaning cloth, 2...Magazine roll. 3... Winding roll, 4... Cleaning liquid supply pipe, 5... Nozzle, 6... Body to be cleaned, 7
...Pad, 8...Blade, 9...
...Holding body, 10...Frame body.

Claims (1)

[Claims] In a cleaning device, the cleaning cloth is moved stepwise between a cleaning cloth magazine roll and a take-up roll while supplying cleaning liquid, and the cleaning cloth is used to clean the printing press cylinder. A cleaning device for a cylinder of a printing press, characterized in that the tip is pressed against the cylinder from the back side.