JP2011161684A - Cleaning apparatus and cleaning method of printing plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning apparatus and cleaning method of a printing plate which can make a simple cleaning of the printing plate to be used for a printing apparatus for relief-printing etc. with successful workability. <P>SOLUTION: This cleaning method includes the following procedures: First, a hanging retainer part 3 for hanging a printing plate 5 is arranged at the upper part of a container 2, and then, a part to be secured 6 arranged on the side part of the printing plate 5 is hung by inserting the part to be secured 6 into a space T of the hanging retainer part 3. Next, the printing plate 5 is made to descend together with the hanging retainer part 3 with the help of an ascending/descending unit, and soaked in a cleaning fluid W. Thus it is possible to achieve elution of an ink stuck to the printing plate 5 to remove the ink. After that, the printing plate 5 is taken out of the cleaning fluid W by the ascending/descending unit, and a frame 41 is moved back and forth horizontally through a nut 43 and a slider 44 by driving a second motor M2. In this case, the frame 41 is moved back and forth while jetting the cleaning fluid to the printing surface of the printing plate 5 from a nozzle 42. Consequently, the ink remaining on the printing plate 5 is removed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a printing plate cleaning apparatus and a cleaning method used in a printing apparatus such as relief printing.

  As a printing method for printed matter such as paper and cardboard, a printing method using a printing plate has been frequently used. This is because the printing plate is wound around the plate cylinder, the plate cylinder is rotated, and the ink is supplied to the printing plate by the anilox roll, while relatively moving the printing object along the plate cylinder, Characters and the like formed on the printing plate are printed on a printing object (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-212187

  At the end of a day's work, it is necessary to wash away the ink adhering to the printing plate. However, heretofore, since this cleaning operation has been performed by hand washing of an operator or the like, there has been a problem that much labor and labor are required.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a printing plate cleaning apparatus and a cleaning method capable of reducing labor of an operator and easily cleaning a printing plate with good workability.

  According to a first aspect of the present invention, there is provided a cleaning apparatus for a printing plate according to the present invention, comprising: a container for storing a cleaning liquid for cleaning the printing plate; A suspension holding unit for holding and suspending the printing plate, lifting means for lifting and lowering the suspension holding unit with respect to the container, and washing water is sprayed toward the printing plate suspended by the suspension holding unit. And a nozzle unit.

  According to a second aspect of the present invention, in the printing plate cleaning apparatus according to the first aspect of the invention, the suspension holding portion holds the back surfaces of the two printing plates facing each other.

  According to a third aspect of the present invention, there is provided the plate cleaning apparatus according to the first or second aspect, wherein the container is provided with a guide member that bends the printing plate lowered by the elevating means in the horizontal direction.

  According to a fourth aspect of the present invention, there is provided the method for cleaning a printing plate according to the present invention, the step of suspending the printing plate on a suspending holding portion provided above a container for storing a cleaning liquid, and the suspended printing plate by the lifting means. A step of lowering the container with respect to the cleaning liquid, a step of lifting the printing plate by the elevating means and removing it from the cleaning liquid, and a printing unit ejected from the cleaning liquid by spraying cleaning water with a nozzle unit. Washing the plate.

  According to a fifth aspect of the present invention, there is provided the method for cleaning a printing plate according to the present invention, the step of suspending the printing plate on a suspending holding portion provided above the container for storing the cleaning liquid, and the lifting plate with the lifting means. A step of lowering the plate with respect to the container and bringing the lower end portion of the printing plate into contact with a guide member provided in the container so that the plate is bent in the horizontal direction and immersed in the cleaning liquid; A step of lifting the printing plate by the elevating means and removing it from the cleaning liquid; and a step of cleaning the printing plate taken out from the cleaning liquid by spraying cleaning water with a nozzle unit.

  According to the present invention having the above-described configuration, the printing plate suspended from the suspension holding portion is immersed in the cleaning liquid in the container by the lifting / lowering means, so that the ink attached to the printing plate is eluted and removed. Next, the printing plate immersed in the cleaning liquid is lifted by the lifting means and taken out from the container, and the printing plate is washed with washing water using the nozzle unit, so that the printing plate is improved in workability without spending much labor and labor. Easy to clean.

The front view of the washing | cleaning apparatus of the printing plate in embodiment of this invention (A) (b) Sectional drawing of the suspension holding | maintenance part used for the washing | cleaning apparatus of the printing plate in embodiment of this invention The side view of the washing | cleaning apparatus of the printing plate in embodiment of this invention (A) (b) Explanatory drawing of the both-ends part of the suspension holding | maintenance part of the washing | cleaning apparatus of the printing plate in embodiment of this invention The perspective view of the printing plate used for the printing plate washing | cleaning apparatus in embodiment of this invention

  An embodiment of the present invention will be described with reference to FIGS. In FIG. 1, a plate washing apparatus 1 includes a container 2, a pair of left and right suspension holding units 3 provided above the container 2, lifting means (described later) of the suspension holding unit 3, and a nozzle unit 4. . In FIG. 1, by immersing the printing plate 5 in the cleaning liquid W stored in the container 2, the ink adhering to the printing plate 5 is eluted and removed. In order to increase the ink removal efficiency, it is desirable that the cleaning liquid W is warm water.

  In FIG. 1, the container 2 is provided with guide members 8 (81, 82). The guide member 8 (81, 82) has rising portions 81a, 82a that bend and rise on the side portions thereof, and the printing plate 5 suspended from the suspension holding portion 3 drives lifting means (described later). When the plate is lowered, the lower end portion of the printing plate 5 is provided so as to come into contact with the rising portions 81a and 82a. By bringing the lower end of the printing plate 5 into contact with the rising portions 81a and 82a, the printing plate 5 is bent in the horizontal direction (arrows a and b) and immersed in the cleaning liquid W.

  As shown in FIG. 1, the guide member 8 (81, 82) as described above is provided in a plurality of stages (two stages in the present embodiment) in the vertical direction, whereby a large number (a plurality of) printing plates 5 are provided in the container 2. Can be laminated substantially horizontally and immersed, and the container 2 can be made shallow to make the entire apparatus compact.

  In FIG. 5, the printing plate 5 is made of a flexible sheet on which a pattern to be printed (character “A” in the present embodiment) is to be printed. Is provided. The locked portion 6 is for winding and fixing the printing plate 5 around the plate cylinder.

  Next, the suspension holding part of the printing plate 5 will be described. In FIG. 1 and FIG. 3, suspension holding portions 3 for suspending the printing plate 5 are provided on the left and right above the container 2. The suspension holding unit 3 will be described with reference to FIG. In FIG. 2A, the suspension holding part 3 includes an upper surface part 3a, a side surface part 3b that hangs downward from both side parts of the upper surface part 3a, and a lower end of the side surface part 3b from a substantially central part of the upper surface part 3a. It consists of a bent part 3c extending in the part direction. A space T surrounded by the upper surface portion 3a, the side surface portion 3b, and the bent portion 3c is a space for holding the locked portion 6 for inserting the locked portion 6 and suspending the printing plate 5. . Further, a gap L for inserting the printing plate 5 is secured between the front end portion 3b1 of the side surface portion 3b and the front end portion 3c1 of the bent portion 3c.

  Next, both end portions (left end portion A, right end portion B) of the suspension holding portion 3 shown in FIG. 3 will be described with reference to FIG. As shown in FIG. 4A, a plate-like stopper 31 is provided at the right end B on the side opposite to the operator P side in the suspension holding part 3 (see also FIG. 2). This stopper 31 prevents the printing plate 5 from slipping off the right end B during cleaning of the printing plate 5.

  In order to suspend the printing plate 5 from the suspending / holding portion 3, the operator P inserts the locked portion 6 into the space T from the left end A as shown in FIG. 3. Next, as shown in FIG. 3 and FIG. 4B, a detachable lid member 32 is attached to the left end A of the suspension holding part 3 in a state where the printing plate 5 is suspended from the suspension holding part 3. (Refer to the lid member 32 indicated by a chain line). The lid member 32 prevents the printing plate 5 from slipping off the left end A during cleaning of the printing plate 5. Moreover, since the suspension holding part 3 has two spaces T, the two printing plates 5 can be suspended simultaneously.

  Next, the raising / lowering means of the suspension holding part 3 will be described. 1 and 3, a horizontal rotating shaft 9 is provided above the container 2. A pulley 10 is attached to the rotating shaft 9, and a wire 11 is tuned to the pulley 10. In FIG. 3, the first motor M <b> 1 is mounted on the frame portion 20. A belt 13 is tuned to the output shaft and the rotary shaft 9 of the first motor M1. Accordingly, by driving the first motor M1, the rotary shaft 9 rotates about its axis.

  The tip of the wire 11 is fixed to the upper part of the suspension holding part 3. Therefore, the first motor M1 is driven forward and backward to rotate the rotating shaft 9, whereby the wire 11 is wound around the pulley 10 and the suspension holder 3 stores the cleaning liquid W via the wire 11. The container 2 moves up and down (arrow c in FIGS. 1 and 3). That is, the rotary shaft 9, the pulley 10, the wire 11, the belt 13, and the first motor M <b> 1 are lifting and lowering means that lifts and lowers the printing plate 5 suspended from the suspension holder 3 with respect to the container 2.

  Next, the nozzle unit 4 will be described with reference to FIGS. 1 and 3, a plurality of vertically long frames 41 are provided in the horizontal direction at positions facing the printing surface of the printing plate 5 suspended from the suspension holding unit 3. In FIG. 1, a plurality of nozzles 42 are provided on the surface of the frame 41 facing the printing plate 5 at a pitch in the vertical direction, and cleaning water flows from the nozzles 42 through a water supply pipe (not shown). It comes to inject.

  In FIG. 1, a nut 43 and a slider 44 are mounted on the back side of the frame 41. The nut 43 is screwed into a horizontal feed screw 45, and the slider 44 is slidably fitted along the guide rail 46 in the horizontal direction. As shown in FIG. 3, the feed screw 45 rotates about its axis by driving a second motor M2 provided on the side of the frame 20 (arrow d). When the second motor M2 is driven and the feed screw 45 rotates, the frame 41 moves in the horizontal direction via the nut 43 and the slider 44 (arrow e in FIG. 3).

  When cleaning the printing plate 5, the entire surface of the printing plate 5 is uniformly cleaned by driving the second motor M2 while spraying cleaning water from the nozzle 42 and moving the frame 41 back and forth in the horizontal direction. be able to. That is, the frame 41 and the nozzle 42 constitute a nozzle unit 4 that ejects cleaning water toward the printing surface of the printing plate 5 suspended from the suspension holding unit 3. Further, the nut 43, the slider 44, the feed screw 45, the guide rail 46, and the second motor M2 are moving means for moving the nozzle unit 4 in the horizontal direction. In the present embodiment, it is possible to suspend and wash a plurality (four) of the printing plates 5, so that a plurality of nozzle units 4 are combined with the printing surface of each printing plate 5 (this embodiment). In the form of 4).

  Note that the nozzle unit may be provided with air jetting means to have a washing water function and an air blowing function. In such a case, by spraying air toward the printing surface of the printing plate 5 after jetting the cleaning water, water droplets attached to the printing plate 5 can be blown off and dried in a shorter time.

  This embodiment is configured as described above. Next, the operation will be described with reference to FIGS. First, as shown in FIG. 3, the operator P inserts the locked portion 6 of the printing plate 5 into the space T of the hanging holding portion 3 and hangs the printing plate 5 on the hanging holding portion 3. When the printing plate 5 is suspended from the suspension holder 3, the lid member 32 is attached to the left end A of the suspension holder 3 (see FIG. 4B).

  Next, by driving the first motor M1, the rotating shaft 9 rotates, the wire 11 is rewound from the pulley 10, and the printing plate 5 is lowered together with the suspension holding portion 3 (arrow c in FIG. 1). . In this way, the printing plate 5 held by the hanging holding unit 3 is immersed in the cleaning liquid W. As shown in FIG. 1, the rising portions of the guide members 81 and 82 are located below the hanging printing plate 5. 81a and 82a are positioned, and the lower end portion of the descending printing plate 5 is brought into contact with the rising portions 81a and 82a, thereby bending the printing plate 5 from the vertical direction to the horizontal direction so that the printing plate 5 is substantially horizontal. 1 is immersed in the cleaning liquid W in a proper posture (arrows a and b in FIG. 1). A considerable portion of the ink adhering to the printing plate 5 immersed in the cleaning liquid W is eluted from the printing plate 5.

  In this dipping process, the printing plates 5 suspended from the suspension holding portions 3 provided above both sides of the container 2 can be dipped at the same time. That is, a plurality of printing plates 5 are suspended from suspension holding portions 3 provided above both sides of the container 2, and the plurality of suspended printing plates 5 are placed on the containers 2 from above both sides of the container 2. The lower plates of the plurality of printing plates 5 that are lowered are brought into contact with the rising portions 81a and 82a of the guide members 81 and 82 provided in the container 2 so that the plurality of printing plates 5 are horizontally aligned. It can be bent and immersed in the cleaning liquid W. As a result, the plurality of printing plates 5 are respectively lowered from above both sides of the container 2 and immersed in the cleaning liquid W. The immersion route of the printing plates 5 suspended by the suspension holding portions 3 is the guide members 81 and 82. Therefore, the printing plates 5 do not collide with each other, and the plurality of printing plates 5 can be cleaned at the same time by being immersed in the cleaning liquid W in an orderly manner.

  When the printing plate 5 is immersed in the cleaning liquid W for a predetermined time, the first motor M1 is driven to raise the printing plate 5 and remove the printing plate 5 from the cleaning liquid W. When the printing plate 5 is taken out from the cleaning liquid W, the second motor M2 is driven to reciprocate in the horizontal direction (arrow e in FIG. 3). At this time, the frame 41 is reciprocated while jetting cleaning water from the nozzle 42 toward the printing surface of the printing plate 5. Thereby, the ink remaining on the printing plate 5 is removed. Further, in the case of using the nozzle 42 provided with air jetting means, the frame 41 is reciprocated while jetting air from the nozzle 42 when the washing operation with the washing water is completed. Thereby, the water droplets adhering to the printing plate 5 can be removed and dried in a shorter time. When the cleaning operation for the printing plate 5 is completed, the operator P removes the lid member 32 from the suspension holding unit 3, removes the printing plate 5 from the suspension holding unit 3, and removes the cleaned printing plate 5 to a predetermined level. Transfer to place.

  According to the present invention, after the printing plate suspended in the suspension holding part is immersed in the cleaning liquid by the lifting / lowering means, the ink attached to the printing plate is removed, and after the printing plate immersed in the cleaning liquid is taken out by the lifting / lowering means, Since the printing surface of the printing plate is washed with washing water using the nozzle unit, the printing plate can be easily washed by light work, and is particularly useful in the field related to letterpress printing.

DESCRIPTION OF SYMBOLS 1 Printing plate washing | cleaning apparatus 2 Container 3 Suspension holding | maintenance part 4 Nozzle unit 5 Printing plate 6 Locked part 8 (81, 82) Guide member 81a, 82a Rising part 9 Rotating shaft 10 Pulley 11 Wire 31 Stopper 32 Cover member 41 Frame 42 Nozzle 43 Nut 44 Slider 45 Feed screw 46 Guide rail W Cleaning fluid

Claims (5)

  A container for storing a cleaning solution for cleaning the printing plate; a suspension holding unit that is provided above the container and holds a locked portion provided on a side of the printing plate to suspend the printing plate; Washing of a printing plate, comprising: lifting and lowering means for lifting and lowering the suspension holding part relative to the container; and a nozzle unit for spraying cleaning water toward the printing plate suspended by the suspension holding part apparatus.   2. The plate washing apparatus according to claim 1, wherein the suspension holding unit holds the back surfaces of two printing plates facing each other.   3. The plate washing apparatus according to claim 1, wherein a guide member is provided in the container for bending the printing plate lowered by the elevating means in the horizontal direction.   A step of suspending the printing plate on a suspension holding portion provided above a container for storing the cleaning liquid, a step of lowering the suspended printing plate with respect to the container by an elevating means and immersing it in the cleaning liquid; The printing plate comprising the steps of lifting the printing plate by the elevating means and removing it from the cleaning liquid; and cleaning the printing plate taken out from the cleaning liquid by spraying cleaning water with a nozzle unit. Cleaning method.   A step of suspending the printing plate on a suspending holding portion provided above the container for storing the cleaning liquid; and the suspended printing plate is lowered with respect to the container by an elevating means so that the lower end portion of the printing plate is A step of bending the printing plate in a horizontal direction by being brought into contact with a guide member provided in the container and immersing the plate in the cleaning liquid; and the immersed printing plate is lifted by the elevating means and taken out from the cleaning liquid. A method for cleaning a printing plate, comprising: a step; and a step of cleaning the printing plate taken out from the cleaning liquid by spraying cleaning water with a nozzle unit.

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