JPH07156370A - Printing cylinder cleaning device - Google Patents

Abstract

PURPOSE:To provide a printing cylinder cleaning device for a printer which does not need a dryer, has a high cleaning efficiency and in which loss of printed sheets is reduced and a vacuum device for treating cleaning waste liquid is not required. CONSTITUTION:The printing cylinder cleaning device comprises cleanser supplying means 2 and a wiping means 3, wherein the means 2 has a cleaning case 13, a cleaning member 14 and a cleanser supplying nozzle 15, and the means 3 has sheet position specifying means (an air cylinder 11, a pressing roller 17), and sheet updating means (a winding roller, a feed roller 19).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning various printing cylinders such as a blanket cylinder and an impression cylinder of an offset printing machine.

[0002]

2. Description of the Related Art In printing with an offset printing machine, foreign matter such as ink, paper powder, powder, and dust may adhere to the surface of a printing cylinder. Such foreign matter may deteriorate the quality of the printed matter, and in order to maintain high quality, the surface of the printing cylinder is occasionally washed during preparation for printing work or during operation, and the above-mentioned foreign matter adhered to the surface is cleaned. Need to be removed. Then, after the printing operation is completed, the surface of the printing cylinder must be thoroughly washed in order to completely remove the attached ink. Therefore, conventionally, a cleaning method such as a sheet wiping type or a cleaning head type has been adopted.

Among these, as a sheet wiping type, Japanese Patent Publication No. 2-6695 is disclosed. Since this method wipes off with a wet sheet, it takes some time for the surface of the printing cylinder body to dry after cleaning, so in order to speed up the drying, a method such as blowing compressed air is necessary. Further, since a small amount of ink is wiped off by being mixed with the residual cleaning liquid on the surface of the body, there is a limit in terms of cleaning efficiency as well, and the loss of printing paper increases. Also, as a cleaning head type,
The applicant of the present invention has already provided Japanese Patent Application No. 5-255401. According to this method, the above-mentioned problems can be solved, but there is a problem that a vacuum device for treating the cleaning waste liquid is required, and therefore the air consumption is large.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems of the prior art, and a drying device is not required, cleaning efficiency is high, and the loss of printed paper is small. An object of the present invention is to provide a printing cylinder cleaning device for a printing machine that does not require a vacuum device for treating cleaning waste liquid.

[0005]

A printing cylinder cleaning device for a printing machine according to the present invention comprises a cleaning liquid supply means for supplying a cleaning liquid to the outer peripheral surface of the printing cylinder at one time over the entire width, and the printing cylinder of the cleaning liquid supply means. And a wiping means which is arranged on the downstream side in the rotation direction of the above and wipes the outer peripheral surface of the printing cylinder over the entire width at a time.
A sheet that includes a cleaning case, a cleaning member attached to the cleaning case, and a cleaning liquid supply nozzle, and the wiping means selectively restricts the cleaning liquid absorbing sheet with respect to the printing cylinder between a detached position and a mounted position. A position regulating means and a sheet updating means for advancing the cleaning liquid absorbing sheet in the length direction to sequentially update the cleaning liquid absorbing portion that is mounted on the printing cylinder by the sheet position regulating means.

[0006]

The cleaning work is performed by bringing the cleaning liquid supply means and the wiping means, which are integrally structured, into contact with the surface of the printing cylinder by the operation of the air cylinder. The cleaning liquid is uniformly supplied from the cleaning liquid supply nozzle over the entire width of the cleaning member, and the cleaning of the printing cylinder is started. Foreign matter such as ink and paper dust that had adhered to the surface of the printing cylinder was introduced between the printing cylinder and the cleaning member, and was carried along with the cleaning liquid to the pressure roller while being adhered to the surface of the printing cylinder. , Absorbed by the absorbing sheet wound by the winding roller.
During the cleaning operation, the take-up roller winds up the absorbent sheet in the cleaning liquid absorbing portion.

[0007]

Embodiments of the present invention will be described below with reference to FIGS. 1 is a front view showing an embodiment of the present invention,
2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a partially enlarged view of FIG. The printing cylinder cleaning device is disposed on the outer peripheral surface of the printing cylinder 1 at one time over the entire width of the cleaning liquid supply means 2, and is arranged on the downstream side of the cleaning liquid supply means 2 in the rotation direction of the printing cylinder 1, 1 and a wiping means 3 for wiping the outer peripheral surface of the No. 1 at one time over the entire width. The cleaning liquid supply means 2 and the wiping means 3
And the upper beam 4 and the lower beam 5, respectively,
The cleaning device side frames 6 at both ends are fixed to each other by bolts or the like to be integrally formed. The printing cylinder 1 is arranged in parallel with the central axis 7 of the printing cylinder 1 so that the printing cylinder 1 can be contacted and separated over the entire width of the printing cylinder 1, and is pressed against the surface of the rotating printing cylinder 1 for cleaning. .

The slide devices 8 arranged at the lower portions of both ends of the lower beam 5 are mounted and fixed on brackets 10 fixed to the printer body frames 9 on both sides. Two or more air cylinders 1 are provided in front of the lower beam 5.
1 is attached by a bolt or the like, and the cleaning member 14 of the cleaning liquid supply means 2 is brought into contact with or separated from the surface of the printing cylinder 1 via the plate 12 by the operation of compressed air. The contact pressure on the surface of the printing cylinder 1 can be appropriately adjusted by an adjusting device (not shown).

The cleaning liquid supply means 2 is a cleaning case 13,
The cleaning case 13 includes a cleaning member 14 made of an elastic material such as sponge and a cleaning liquid supply nozzle 15. A large number of fine holes are formed in the nozzle 15 in the width direction of the printing cylinder 1. The cleaning liquid is
The cleaning liquid is supplied to the cleaning member 14 by the cleaning liquid supply nozzle 15 from a cleaning liquid supply device (not shown) via a pipe or the like.

The wiping means 3 includes a pressing roller 17 for pressing the absorbent sheet 16 against the printing cylinder 1, a take-up roller 18 for winding the absorbent sheet 16, a feed roller 19 for feeding, and a sheet guide. 20 and a pair of pressing rollers 21. The pressing force of the pressing roller 21 is
It can be adjusted appropriately by an adjusting device (not shown). The winding roller 18 may be driven by either compressed air or a motor. Further, as normally adopted, the absorbent sheet 16 in the cleaning liquid absorbing portion can be wound by a winding device, and the tension applied to the absorbent sheet 16 can be kept constant. .

The air cylinder 11 and the pressing roller 1
7 constitutes a sheet position restricting means for selectively restricting the absorbent sheet 16 with respect to the printing cylinder 1 between the detached position and the mounted position, and the take-up roller 18 and the feed roller 19 are provided.
The sheet position regulating means constitutes a sheet updating means for sequentially updating the cleaning liquid absorbing portion of the absorbing sheet 16 mounted on the printing cylinder 1.

Next, the operation will be described. During the printing and after the printing is finished, the cleaning liquid supply means 2 having an integral structure 2
The wiping means 3 and the wiping means 3 are separated from the surface of the printing cylinder 1. In the cleaning operation, first, the printing cylinder 1 is rotated and the air cylinder 11 is extended so that the cleaning liquid supply means 2 and the wiping means 3 are brought into contact with the printing cylinder 1 for cleaning. The cleaning liquid is supplied from the cleaning liquid supply nozzle 15 to the cleaning member 1
4 and the cleaning of the printing cylinder 1 begins. Foreign matter such as ink and paper dust that has adhered to the surface of the printing cylinder 1 is introduced between the printing cylinder 1 and the cleaning member 14, and is adhered to the surface of the printing cylinder 1 together with the cleaning liquid to the pressing roller 17. It is carried and absorbed by the absorbent sheet 16. During cleaning, the winding roller 18 winds up the absorbent sheet 16 in the cleaning liquid absorbing portion. Then, the cleaning liquid supply unit 2 and the wiping unit 3 are operated to separate the cleaning liquid supply unit 2 and the wiping unit 3 from the surface of the printing cylinder 1 to complete the cleaning operation.

[0013]

According to the present invention, since the cleaning liquid is wiped off with a dry cleaning liquid absorbing sheet, the cleaning liquid does not remain on the surface of the printing cylinder after cleaning, and thus a drying device is not required. Since it does not occur, the cleaning efficiency is good, the damage of the printed paper can be reduced, and the air for treating the cleaning waste liquid is not required. Therefore, an auxiliary device such as a vacuum device is not required.

[Brief description of drawings]

FIG. 1 is a front view of a cleaning device showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partially enlarged view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Printing cylinder 2 ... Cleaning liquid supply means 3 ... Cleaning liquid wiping means 4 ... Upper beam 5 ... Lower beam 6 ... Cleaning device side frame 7 ... Central axis 8 ...・ Sliding device 9 ・ ・ ・ Printer body frame 10 ・ ・ ・ Bracket 11 ・ ・ ・ Air cylinder 12 ・ ・ ・ Plate 13 ・ ・ ・ Cleaning case 14 ・ ・ ・ Cleaning member 15 ・ ・ ・ Cleaning liquid supply nozzle 16 ・ ・ ・Absorption sheet 17 ... Pressing roller 18 ... Winding roller 19 ... Feeding roller 20 ... Sheet guide 21 ... Pressing roller

Claims (1)

[Claims] 1. A cleaning liquid supply unit for supplying a cleaning liquid to the outer peripheral surface of the printing cylinder at one time over the entire width, and a cleaning liquid supply unit disposed downstream of the cleaning liquid supply unit in the rotation direction of the printing cylinder to cover the entire outer peripheral surface of the printing cylinder. The cleaning liquid supply means includes a cleaning case, a cleaning member mounted on the cleaning case, and a cleaning liquid supply nozzle, and the cleaning means supplies the cleaning liquid absorbing sheet to the printing cylinder. With respect to the separating position and the cylinder position, a sheet position restricting means for selectively restricting the cleaning liquid and a cleaning liquid that is adsorbed on the printing cylinder by the sheet position restricting means by advancing the cleaning liquid absorbing sheet in the length direction. A printing cylinder cleaning device for a printing press, comprising: a sheet updating unit that sequentially updates an absorbing portion.