KR20040071795A - Blanket cylinder cleaner of offset-press - Google Patents

Abstract

PURPOSE: A blanket cylinder cleaner of an offset-press is provided to improve cleaning performance and to save a cleaning pad by achieving a cleaning process through a rotation of the blanket cylinder. CONSTITUTION: A cleaning pad(7) is installed between a blanket cylinder(1) and a compression pad. The compression pad is installed to the cylinder(1) in parallel. The external surface of the blanket cylinder(1) has an arch shape such that the compression pad makes contact with the external surface of the blanket cylinder(1) while shrinking and expanding. Both edge parts(15) are installed at a base bar(14). A base bar(14) is attached to a supporting frame(3). The blanket cylinder cleaner is connected to a frame(2). The edge parts are installed in the base bar(14) such that a fixture bolt(17) of a pad cover supports the compression pad.

Description

Blanket cylinder cleaner of Offset printing machine {Blanket cylinder cleaner of Offset-Press}

The present invention relates to a blanket cylinder cleaning device of an offset press, and more particularly, a cleaning cloth is applied to a blanket surface of a blanket cylinder by using a pressing pad to clean the ink and lumps attached to the blanket surface of the offset press blanket cylinder. The present invention relates to a blanket cylinder cleaning apparatus for an offset printing machine, in which two surfaces contact a blanket to be cleaned by rotation of a blanket cylinder, thereby improving cleaning performance and saving cleaning cloth.

In general, there are two methods of transferring ink from a plate to paper: direct printing, which transfers ink directly to the paper, and indirect printing, which transfers the ink to a rubber blanket and transfers it to the paper. Offset printing is one of the indirect printing methods, which do not print directly on a printed object on a plate, but transfer the printed sheet onto a rubber blanket that acts as an intermediary, and then prints on paper. Offset printing was first applied to metals and glass that were not possible with direct printing. Its feature is the use of rubber blankets, so it can be clearly printed on rough paper, its printing strength is stronger than that of direct printing, and the letters and images on the board are like prints. The convex plate, the concave plate, and the plate are also offset printed, but the flat plate is mainly offset printed. Therefore, in general, offset printing often means flat printing. The offset printing machine is assembled into three cylinders: a plate cylinder, a rubber blanket cylinder, and a pressure cylinder. The special feature of the offset printing machine is a damping device, which is a device to bury water to prevent ink from being deposited on the non-flammable portion of the plate surface. Offset printing in which water is not applied to the printing plate is called dry offset, and there is a type of offset printing of the printing plate by a convex plate or a gravure plate. In addition, offset printers include multi-color machines capable of printing two or more colors at the same time, and double-sided printers for printing both sides of paper.

Conventionally, as shown in FIG. 1, the overall configuration of the blanket cylinder cleaning device of the conventional offset printing machine and the side view of the blanket cylinder cleaning device of the conventional offset printing machine, the pressing pad 6 forms a rubber flat plate in a semi-circular shape or a plate shape to form a base bar 14. The cleaning cloth 7 was brought into contact with the surface of the blanket cylinder 1 by air pressure of the pressing pad 6.

An air chamber is formed between the pressing pad 6 and the base bar 14, and the pressing pad 6 is fixedly installed between both edges, and the pressing pad 6 is convex toward the outer surface of the blanket cylinder 1. It is supplied into the air chamber through the pad air supply nozzle 10 so that it can be. Therefore, the cleaning cloth comes into contact with the pressing pad 6 and the blanket cylinder 1 in a constant width, and when the blanket cylinder 1 rotates in the direction indicated by the arrow, the cleaning cloth 7 is blanketed by the pressing pad 6. It contacts with the outer surface of the cylinder 1, and wash | cleans the outer surface of the blanket cylinder 1. As shown in FIG. Then, when the air is discharged from the air chamber, the compression pad 6 is contracted to fall off the surface of the blanket cylinder 1. Here, the compression pad 6 is repeatedly expanded and contracted elastically at 7 to 10% elongation by compressed air having a pressure of about 0.5 kg / cm 2. However, in order to clean the ink on the surface of the blanket, the compression pad 6 is elastically inflated to contact the surface of the blanket and perform cleaning. It is carried out when reversing and the piston is restored to its original position by the compression spring. In addition, the compression pad 6 has a change in thickness that becomes thinner and thinnest at one side edge portion 15 at the time of expansion. Therefore, the pressing pad 6 has sufficient elasticity and can be contacted and kept pressurized for cleaning the surface blanket of the blanket cylinder 1.

The cleaning cloth 7 wound on the supply roll 4 of the cleaning device is in contact with the surface of the blanket cylinder 1 by inflation of the pressing pads 6 by inflation and then rotated in opposite directions. By wiping off the foreign matter adhering to the blanket cylinder 1, the compression pad 6 is made of rubber having elastic material to reduce noise generated during operation due to the uneven portion formed structurally in the blanket cylinder. However, the compression pad 6 is expanded or contracted according to the magnitude of the air pressure supplied to the air chamber 18 through the air supply nozzle 10, thereby contacting and separating the blanket cylinder. In the cleaning apparatus, when the air is supplied to the compression pad 6, the pad is shaped into a '∪' shape and comes into contact with one side of the blanket cylinder to clean, resulting in poor cleaning efficiency and excessive consumption of the cleaning cloth.

The present invention is created to solve the above conventional problems,

Its purpose is to clean the stakes attached to the blanket surface of the offset printing machine blanket cylinder and the ink pads by pressing the pads on the blanket surface of the blanket cylinder. It is possible to provide a blanket cylinder cleaning device for an offset printing machine that can be used to improve cleaning performance and to save cleaning cloth.

The present invention is a support frame parallel to the blanket cylinder and one end is fixed to the center portion of the frame, a base bar attached and fixed to the lower surface of the support frame, a compression pad fixed to both left and right sides of the base bar, the compression A cleaning cloth provided between the pad and the blanket cylinder to remove foreign substances adhering to the surface of the blanket cylinder, a supply roll fixed to one side of the frame to supply the cleaning cloth, and fixed to one side of the frame symmetrically with the supply roll And a winding roll for collecting the cleaning cloth, wherein the cleaning device comprises a pressing pad formed so that the cleaning cloth contacts the two surfaces of the outer surface of the blanket cylinder to clean the blanket cylinder. The object of the present invention is to provide a blanket cylinder cleaning device for an offset printing machine. Can achieve.

1 is an overall configuration diagram of a blanket cylinder cleaning device of a conventional offset printing machine,

Figure 2 is a side view of a blanket cylinder cleaning device of a conventional offset printing press,

3 is a side view of a first embodiment of a blanket cylinder cleaning device of the present invention;

Figure 4 is a side view of a second embodiment of the blanket cylinder cleaning device of the present invention,

5 is a partial detailed view of a second embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

(1): Blanket cylinder (2): Frame

(3): support frame (4): feed roll

(5): winding rolls (6), (6 '): crimp pad

(7): cleaning cloth (8): advance cylinder

(9): cleaning liquid jet nozzle (10): pad air supply nozzle

(11): Winding air supply nozzle (12): Cleaning liquid supply nozzle

(13): surface drying nozzle (14): base bar

(15): Edge portion 16: Pad fixing cover

(17): Pad cover fixing bolt (18): Air chamber

(20): 2 roll press pad 21: Fixed shaft

22: air cylinder 30: fixed pad

(31): Mounting Bracket

When described in detail with reference to the accompanying drawings, the configuration and the operation of the embodiment of the present invention to achieve the object as described above and to perform the task for eliminating the conventional drawbacks.

Figure 3 shows a side view of a first embodiment of the blanket cylinder cleaning apparatus of the present invention, wherein a cleaning cloth 7 is installed between the blanket cylinder 1 and the pressing pad 6 ', and the pressing pad 6' Is installed parallel to the cylinder (1). The pressing pad 6 'contracts and expands with respect to the outer surface of the blanket cylinder 1 so as to be arched between the two edge portions 15. As shown in FIG. Both edge portions 15 of the compression pad 6 'are mounted to the base bar 14, which is attached to the support frame 3, and the cleaning device is attached to the frame 2. It is connected. The pad cover fixing bolt 17 is fixed to the base bars 14 at the edge portions 15 to support the compression pad 6 ′. There is a supply roll (4) for supplying the cleaning cloth (7) and a blowing roller (5) for winding the cleaning cloth (7), the cleaning liquid injection nozzle (9) is located inside the pad fixing cover (16) It is configured to spray the cleaning solution of the nonwoven fabric to make the cleaning cloth (7) and to facilitate the cleaning operation.

In order to increase the cleaning efficiency, the pressing pad 6 'has a surface in which the blanket cylinder and the pressing pad are in contact with each other. '' When the pad is formed thick in the middle and expanded with low pressure air '' It is configured to maintain the shape and increase the efficiency by two-sided contact during the cleaning action.

Figure 4 shows a side view of a second embodiment of the blanket cylinder cleaning apparatus of the present invention, wherein a cleaning cloth 7 is installed between the blanket cylinder 1 and the two roll pressing pad 20, and the two roll pressing pad ( Two 20 are installed in each of the fixed shafts 21 on the base bar 14 in parallel with the cylinder 1. A supply roll 4 for supplying the cleaning cloth 7 and a blowing roller 5 for winding the cleaning cloth 7 are fixed to the frame 2, and the air cylinder 22 is disposed on an upper side of the frame 2. ) Is configured such that the entire frame 2 can be moved up and down.

The two-roll pressing pad 20 is formed in two rolls so as to have a surface in which the blanket cylinder and the pressing pad are in contact with each other in order to increase cleaning efficiency, and has a small expansion and contraction rate on the fixed shaft 21 of steel. Manufactured by coating with elastomer, and installing it on the frame, it consists of a compression pad that can rotate at high torque. 'It is configured to maintain the shape and increase the cleaning efficiency by two-sided contact.

5 is a partial detailed view of a second embodiment of the present invention, an installation bracket 31 attached to one side of the frame 2 and an air cylinder having one side fixed to an upper portion of the installation bracket 31 ( 22 and a fixing pad 30 fixed between the air cylinder 22 and the mounting bracket 31 to fix the air cylinder 22.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

' In the case of the 'type pressing pad 6', air is injected into the air chamber 18 between the pressing pad 6 'and the base bar 14 so as to expand the pad and make contact with the outer surface of the blanket cylinder 1. ' 'Type crimp pad 6' is provided when the cleaning cloth 7 rotates in the reverse direction by contacting the surface of the blanket cylinder 1, 'Type crimp pad 6' can form two contact surfaces and have twice the cleaning effect. In addition, when air is discharged from the air chamber 18, the pressing pad 6 'is separated from the outer surface of the blanket cylinder 1. When compressed air is discharged, it is concave with respect to the cylinder 1 between the edge parts 15 of both sides. Therefore, the cleaning cloth 7 falls off the outer surface of the cylinder 1.

In the case of the two-roll pressing pad 20, the frame 2 can be advanced and retracted by the air cylinder 22 so that the two-roll pressing pad 20 comes into contact with the blanket cylinder 1. When the two-roll pressing pad 20 moves forward, the cleaning cloth 7 between the blanket cylinder 1 and the two-roll pressing pad 20 contacts the outer surface of the blanket cylinder 1 so that the rotation direction of the blanket cylinder 1 And the cleaning device rotates in the opposite direction to each other to perform the cleaning operation. When the air cylinder 22 is reversed, the blanket cylinder 1 and the two-roll pressing pad 20 are separated from each other, and the cleaning cloth 7 is separated from the blanket cylinder ( 1) It falls off the outer surface.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the blanket cylinder cleaning apparatus of the offset press according to the present invention is intended to increase the cleaning efficiency by deforming the pressing pad to clean the blanket surface, and the cleaning cloth can be simply pressed against the cylinder and the pressing pad is pressed. Both edges are fixed so that noise and vibration are not amplified. Remove the crimp pad from the 'Deformation and cleaning can reduce the damage of the crimp pad, improve durability, and prevent the waste of cleaning cloths and cleaning fluids.In addition, clean cleaning of the blanket surface provides high-quality prints while reducing the waste of cleaning cloths. And, it is a very useful invention, such as excellent energy saving effect, working environment is improved.

Claims (5)

A support frame parallel to a blanket cylinder and having one end fixed to a central portion of the frame, a base bar attached and fixed to a lower surface of the support frame, a compression pad fixed to both left and right sides of the base bar, and a compression pad and a blanket A cleaning cloth provided between the cylinders to remove foreign substances adhering to the surface of the blanket cylinder, a supply roll fixed to one side of the frame to supply the cleaning cloth, and a cleaning cloth fixed to one side of the frame symmetrically with the supply roll In the cylinder cleaning device comprising a take-up roll for recovering, A blanket cylinder cleaning device for an offset printing machine, characterized in that the cleaning device comprises a pressing pad formed so that the cleaning cloth (7) comes into contact with two surfaces of the outer surface of the blanket cylinder (1) to clean the blanket cylinder. The method of claim 1, The cleaning device fixes the edge portions 15 of the compression pad 6 'to both sides of the base bar 14 by pressing the pad 6' to the pad fixing cover 16 and the pad cover fixing bolt 17. When the air is injected into the air chamber 18, it expands to contact the cleaning cloth 7 on two outer surfaces of the blanket cylinder 1, and when the air is discharged, the cleaning cloth 7 is restored to a circular shape so as to return to the blanket cylinder 1. A blanket cylinder cleaning device for an offset printing machine, characterized in that the cleaning cloth (7) is formed in a non-contact manner. The method of claim 2, The pressing pad 6 'is' Blanket cylinder cleaning device of an offset printing machine, characterized in that the center portion of the pad is formed thick. The method of claim 1, The cleaning device is formed by pressing pads in the shape of two rolls, and fixing and attaching both ends of the fixed shaft 21 to one side of the base bar 14 so as to rotate at a high torque, and one side of the frame. Fixing the mounting bracket 31 to the upper surface of the mounting bracket 31 to fix the one end of the air cylinder 22 to move the frame 2 up and down, and installed with the air cylinder 22 Blanket cylinder cleaning device of the offset printing machine, characterized in that it comprises a fixing pad (30) provided between the brackets 31 to fix the air cylinder (22). The method of claim 4, wherein The two-roll pressing pad is a blanket cylinder cleaning device of the offset printing machine, characterized in that the fixed shaft 21 is covered with a solid elastomer having a small expansion and contraction rate.