JPH07119114B2 - Blanket washing machine for offset printing proofing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention uses an ink solvent and a wiping cloth such as a non-woven fabric on the blanket cylinder surface of a multi-color offset printing proofing machine for 2 to 4 colors. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blanket cleaning machine for automatically cleaning, and more particularly to a cleaning machine capable of efficiently cleaning a blanket of each color printing frame unit with a continuous single web-shaped wiping cloth at one time.

(Prior Art) Conventionally, in a two-color or four-color offset proofing machine, since the total length of the base is long, the extra space is removed as much as possible, and the installation space of the blanket washing machine is also limited. It was Further, the web-shaped wiping cloth dedicated to the washing machine is attached for each color unit, and since the cloth replacement work is performed in a small space, it takes a lot of time and effort.

(Prior Art) According to the present invention, a plurality of blanket cylinders are unwound in a pair and washed by a continuous web-shaped wiping cloth having a winding mechanism, so that a cloth for wiping in a proofing machine can be obtained. The installation space is reduced, the space of the calibrator body is effectively used, and a large amount of cloth can be efficiently loaded, and the number of cloth replacement operations and the speed of replacement time are increased. The purpose is.

(Structure of the Invention) According to the present invention, a plurality of inking units are arranged on a base of a printing proofing machine, and printing is provided correspondingly with a blanket cylinder, an inking roller, a blanket cylinder idling drive unit, etc. on the base. In an offset printing proofing machine having a structure in which a gantry is movably provided and each of the printing gantry can be temporarily stopped at the inking unit side and the blanket cylinder can be idle at the stop position, A pressing member provided under each blanket cylinder at a stop position so as to be able to press and separate so as to face the blanket cylinder, and to continuously run between the pressing member and the blanket cylinder facing each other Provided between the pressing member and the web-shaped wiping cloth interposed between the web-shaped wiping cloth and the pressing member to enable the web-shaped wiping cloth to run while avoiding the inking unit. A blanket washing machine for an offset printing proofing machine, comprising a drag roller.

(Effect of the Invention) The present invention provides a blanket cylinder of an offset printing proofing machine having a blanket cylinder on each of a plurality of printing platforms.
By installing the solvent for the blanket cleaning of the multicolor proofing machine in a lump by washing with an ink solvent and continuous web-shaped cloth that can be unrolled and run and stopped. And again,
The installation space for the unwinding and winding mechanism can be reduced. Also,
The number of times the wiping cloth is replaced and the time required for replacement can be reduced. Further, by providing the guide roller between the pressing members, even when the inking unit is arranged in the base as in the offset printing proofing machine, the web-shaped wiping cloth avoids the inking unit. It becomes possible to drive.

(Example) The present invention will be described in detail according to an example. FIG. 1 is a schematic side view of an offset printing proofing machine to which the device of the present invention is attached, and illustrates one embodiment of the present invention.

1 is a calibrator base, 2 is rack gear of linear track, 3
Is a printing stand that can reciprocate on the gear 2 in the arrow direction, 4
Is a movable dampening mount for supplying dampening water used in offset lithographic printing, and is equipped with a dampening sleeve roller 5 for adhering dampening water on the printing plate, and is installed on the printing base 1 side. The dampening water supply unit 6 can reciprocate on the linear rack gear 2 in the arrow direction.

A printing plate 7 and a sheet 8 to be printed such as paper are positioned and installed at predetermined locations in the middle of the base 1 for each color.

The two printing pedestals 3 at the right end of FIG. 1 each include a blanket cylinder 12, and pinion gears (not shown) at both ends of the cylinder 12, which mesh with the rack gear 2. Further, a drive pinion gear 9 that meshes with the rack gear 2 and an inking roller 10 are installed, and the drive pinion gear 9 can be rotated by a moving drive motor (not shown) integrally attached to the base 3. That is, the printing frame 3 is reciprocally driven. The printing base 3 is the ink supply roller of the inking unit 13 in which the ink application roller 10 is installed on the printing base 1 side at the right end of the base.
It stops once in contact with 14 or close to it. A flexible wiping member 15 is installed which vertically moves so as to face the lower side of each blanket of the gantry 3 in this position and presses and separates from the sheet-shaped blanket wound around the blanket cylinder 12 circumference. A web-shaped wiping cloth 16 is provided between the blanket cylinder 12 and the wiping member 15 so as to be able to run and stop. Under the wiping members 15 and 15, unwinding and winding shafts 17 and 18 of the cloth 16 are installed. Then, the fabric 16 is a blanket cylinder 12,12.
It is guided around the lower side of the inking unit 14 between. And, for example, on the appropriate guideline of the cloth 6,
A spring-loaded roller for tension adjustment is provided outside the guideline.

FIG. 2 is an enlarged side view of the device of the present invention. Wiping member 1
5,15 can be linearly moved in the vertical direction by an air cylinder or a crank arm (not shown) provided on the side of the printing base 1. The solvent supply nozzle 26 is provided in front of and / or behind each of the members 15, 15.
Alternatively, the members 15 and 15 may be provided with an elastic member 15a on the upper portion thereof so that the member 15a can be expanded and contracted by air. A solvent recovery tank 24 is provided below the wiping member 15.

In the apparatus of the present invention, each printing base 3 on which the proof plate is printed is temporarily stopped on the ink supply roller 14 side of the printing base 1 in FIG. 1, and the rack gear 2 below the blanket cylinder 12 in FIG.
The lifting rack gear 2a of is lowered. On the other hand, the wiping member 15,1
5 is raised to press the fabric 16 against the peripheral surface of the blanket 12a. Then, a solvent such as toluene or trichlene is supplied from the solvent supply nozzle 26 or 27 to the cloth 16 or blanket 12a.
Drive motor for idling (not shown) while supplying to the peripheral surface
To drive the idle conduction gear 11 to rotate the blanket cylinder 12 in the arrow direction, for example, and press it against the cloth.
The surface of the blanket 12a is cleaned by liquefying the residual ink after proof printing adhered to the blanket 12a by the solvent 16 and a solvent, and liquefying it.

After the wiping, the wiping members 15 and 15 are lowered and the cloth 16 is wound by the pulse motor 25 in any one direction for a predetermined length,
16 new wiping cloths are unwound and stopped.
The pulse motor 25 is controlled to perform the friction operation or the braking operation except during the driving / rotating operation.

INDUSTRIAL APPLICABILITY The apparatus of the present invention is capable of cleaning the blanket cylinders of a plurality of printing racks installed in a multicolor dry offset and wet offset printing proofing machine and the blanket surface wound around the blanket cylinders at one time, and continuously Since it can be wiped and washed with the web-like wipe cloth of the book, the installation space of the unwinding side and winding side equipment necessary for storing and installing a large amount of cloth used for cleaning can be efficiently adjusted according to the calibration machine. The effect is that it can be abraded and the number of times the wiping cloth can be replaced and the time required for replacement can be shortened.

[Brief description of drawings]

FIG. 1 is a schematic side view of a two-color offset lithographic printing / proofing machine in which the device of the present invention is installed, and FIG. 2 is an enlarged side view of the device of the present invention. 1 ... Printing base, 2 ... Rack gear 3 ... Printing base, 9 ... Pinion gear 10 ... Inking roller 11 ... Idling gear, 12 ... Blanket cylinder 13 ... Inking unit 14 ... Ink Supply roller 15 …… wiping member, 16 …… wiping cloth 17,18 …… winding shaft 19,20,21,22 …… guide roller 23 …… tension adjusting roller 24 …… solvent recovery tank, 25 …… motor 26,27 …… Solvent supply nozzle

Claims (1)

[Claims] 1. A plurality of inking units are arranged on a base of a printing proofing machine, and a printing rack having a blanket cylinder, an ink forming roller, a blanket cylinder idler drive unit, etc. can be moved on the base correspondingly. In the offset printing proofing machine having a structure capable of temporarily stopping at the inking unit side and idling the blanket cylinder at the stop position, A pressing member provided under each of the blanket cylinders so as to be able to press and separate from each other against the blanket cylinder, and a facing member between the pressing member and the blanket cylinder so as to be capable of running continuously. A guide roller that is provided between the web-shaped wiping cloth and the pressing member and that allows the web-shaped wiping cloth to run while avoiding the inking unit. Blanket washer for offset printing proofer, characterized in that it comprises a.