JP4074483B2 - Cylindrical wiping device for forming coating film - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a negative type photosensitive agent, a positive type photosensitive agent, an ablative black shading agent, a coating agent such as an antioxidant that is overcoated on a resist, for gravure printing, flexographic printing, rotary screen printing, or endless offset printing. In order to form a good film by uniformly coating the photosensitive drum of a laser printer or photocopier, or a pinhole adhering to the photosensitive drum or photosensitive drum before coating, It is related with the wiping apparatus of the cylindrical body which forms the coating film which can wipe off the dirt and oil which become completely.
[0002]
[Prior art]
One method of making a gravure printing roll is to mirror polish the copper sulfate plating surface of the plate making roll, clean the surface, dry the surface, apply a photosensitive film on the copper sulfate plating surface, print the image with a laser, and then develop A so-called etching method is performed in which etching is performed, resist is removed, and chromium plating is performed.
When a photosensitive film is applied, there is a problem that a pinhole that is not coated with a photosensitive film is generated, and there are several possible causes. The first cause is mirror polishing. Pure water is not used when cleaning and drying the surface, and the second cause is that polishing powder adhering to the surface cannot be washed out sufficiently and sufficiently even after mirror polishing and cleaning. The second cause is that the chamber of the polishing apparatus is isolated from the chamber of the photosensitive film coating apparatus, and polishing is performed in a wet manner so that the polishing powder does not enter the chamber of the photosensitive film coating apparatus, but the cleanness of the plate making room is low. The fourth cause is that the coating roll of the photosensitive film coating apparatus (Japanese Patent Laid-Open No. 6-230580) is a sponge roll, and fine particles on the surface fall off over a long period of time.
[0003]
As shown in Japanese Patent Laid-Open No. 6-230580, alcohol cleaning is conventionally performed on the copper sulfate plated surface as a pretreatment for applying a photosensitive film to avoid the generation of pinholes. Alcohol cleaning is performed by immersing the rotationally driven coating roll attached to the tank, rotating the coating roll in contact with the copper sulfate plating surface of the rotationally driven plate-making roll in a different direction with respect to one end, and moving to the other end. I was doing.
In this method, dirt and oil that cause pinholes adhering to the plate making roll are wiped off with the application roll and collected in the alcohol liquid stored in the tank, so that the dirt adheres again. I found out that it was supposed to be.
[0004]
[Problems to be solved by the invention]
The present invention has been devised in view of the above-mentioned points, and it is possible to apply a coating agent such as a negative type photosensitive agent, a positive type photosensitive agent, an ablative black light-shielding agent, or an antioxidant to be applied to a resist for gravure printing, flexographic printing In order to form a good film by coating uniformly on a photosensitive drum of a laser printer or a copying machine, a plate-making roll or a photosensitive roll before coating is used. It is an object of the present invention to provide a cylindrical wiping device for forming a coating film, which can completely wipe off dirt and oil causing pinholes adhering to a drum.
[0005]
[Means for Solving the Problems]
[Claim 1] The invention described in claim 1 includes a cylindrical chuck rotating means for rotating a plate-making roll for forming a coating film or a cylindrical body such as a photosensitive drum by chucking both ends thereof, and a moving table that moves along the cylindrical body. And a movable bracket having a bay portion that is provided on the moving table and can be adjusted in a position that is close to and away from the cylindrical body in a direction orthogonal to the axis of the cylindrical body and that receives the cylindrical body when approaching the cylindrical body The wiping cloth tape that is not self-dusting is unwound from the original reel mounted on the movable bracket and is wound around a pair of guide rolls that are provided on the opposing part that sandwich the bay of the movable bracket. Take up the tape with the bobbin, pay out the tape, move the movable bracket closer to the cylindrical body, put the cylindrical body into the bay of the movable bracket, and what is the direction of tape travel? Rotate in the direction and take up the tape to slidably contact the cylindrical body where the tape rotates to wipe dirt and oil adhering to the cylindrical body. The present invention provides a wiping device for a cylindrical body for forming a coating film, characterized in that the moving base is configured to move along the cylindrical body as performed.
[0006]
[Claim 2] The invention described in [Claim 2] includes a cylindrical chuck rotating means that rotates by chucking both ends of a cylindrical body such as a plate-making roll or a photosensitive drum for forming a coating film, and a moving table that moves along the cylindrical body. And a lift table provided on the moving table so that the position can be adjusted by moving toward and away from the cylindrical body in a direction perpendicular to the axis of the cylindrical body, and a stroke of the cylinder device provided on the lifting table. The movable bracket having a bay portion for receiving the cylindrical body when the cylindrical body is moved in the direction of approaching and separating from the cylindrical body and approaching the cylindrical body in cooperation with the lifting table, and self from a raw reel attached to the movable bracket. A tape of wiping cloth that does not generate dust is fed out and passed over a pair of guide rolls provided at the opposing parts that sandwich the bay of the movable bracket, and the tape is rotated by a torque motor. It is configured to wind on a driven take-up bobbin and to apply braking to the feeding of the tape from the original fabric reel, and move the movable bracket closer to the cylindrical body so that the cylindrical body is placed in the bay of the movable bracket. Rotate the tape in the direction opposite to the tape running direction, and the torque motor rotates to wind the tape on the bobbin, and slides on the rotating cylinder to wipe away dirt and oils adhering to the cylinder. The movable body is configured to move along the cylindrical body so that the cleaning with the tape is performed from one end to the other end of the cylindrical body. A cleaning device is provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a cylindrical wiping apparatus for forming a coating film of the present invention will be described with reference to the drawings.
FIG. 1 shows a front view of a cylindrical wiping apparatus for forming a coating film of the present invention.
FIG. 2 is an enlarged side view of a main part before the wiping operation.
FIG. 3 is an enlarged side view of the main part during the wiping operation.
In FIG. 1, the casing of the code | symbol 1 has the roll-in / out door 1 which raises and closes the roll-in / out opening 1a while having the roll-in / out opening 1a in the upper front portion.
A cylindrical chuck rotating means 3 is provided in the casing 1. The cylindrical chuck rotating means 3 chucks the cylindrical body R with the drive side chuck 3a that is driven to rotate by a motor (not shown) and the tail chuck 3c that moves according to the roll length provided on the movable table 3b. The rotational speed at which the required low speed, for example, the peripheral speed is 0.5 m / s is calculated by inputting the diameter of the cylindrical body R, and the rotational speed is rotated.
The cylindrical body R according to this embodiment is a plate-making roll for gravure printing having a size of 100 φmm × 800 mm to 300 φmm × 2000 mm.
[0008]
Below the cylindrical body R chucked by the cylindrical chuck rotating means 3, the traveling platform 5 placed on the rail 4 can reciprocate along the cylindrical body R by ball screw driving. A movable bracket 7 is provided on the lifting table 6 mounted on 5, and the movable bracket 7 is equipped with a wiping head.
In the configuration for raising and lowering the elevating table 6, the elevating table 6 is guided by a vertical linear motion guide 8 provided on the moving table 5, and a ball screw (not shown) is placed on the traveling table 5 as a vertical axis. And a ball nut (not shown) that is screwed to the ball screw is provided on the lifting table 6, and the ball nut is rotated by a servo motor (not shown) so that the ball nut becomes a runner.
The movable bracket 7 is configured to further move up and down with respect to the lifting table 6 that moves up and down. The movable bracket 7 is moved up and down by guiding a male guide 10 provided on the movable bracket 7 to a female guide 9 provided on the lift table 6, and the lift table 6 and the movable bracket 7 are connected by a cylinder device 11. The movable bracket 7 is moved up and down with respect to the lifting table 6 by the expansion and contraction of the cylinder device 11.
The movable bracket 7 is lifted before the lifting table 6 by the extension operation of the cylinder device 11, and is then chucked by the cylindrical chuck rotating means 3 when the lifting table 6 is lifted and lowered. It has a bay portion 7a for receiving the cylindrical body R.
A proximity sensor 12 is attached to the movable bracket 7 so as to correspond to the central portion of the bay portion 7a. The proximity sensor 12 outputs a detection signal when the gap with the lower surface of the cylindrical body R received in the bay portion 7a becomes 3 mm, for example, and the lifting table 6 is raised and stopped based on this detection signal. It is like that.
Therefore, the cylinder of the movable bracket 7 is used for extending the movable bracket 7 greatly by the extension of the cylinder device 11 and then placing the cylinder R into the bay 7a of the movable bracket 7 regardless of the diameter. The stroke corresponding to the diameter of R is shared by the lifting table 6 to shorten the operation time and the positioning stroke.
The moving speed of the moving table 5 is changed according to the number of rotations of the cylindrical body R so that it moves, for example, 8 to 10 mm when the cylindrical body R makes one rotation.
[0009]
The wiping head is provided with a pair of guide rolls 14 provided at opposing portions that feed out a tape T of a wiping cloth that is not self-dusting from an original reel 13 attached to the movable bracket 7 and sandwiches the bay 7a of the movable bracket 7. 15 is wound around a take-up bobbin 17 that is rotationally driven by a first torque motor 16 and a braking free roll 17 to which a nip pressure is applied to the guide roll 14 by a cylinder device 20. The tape T is pressed to press the tape T, and the rotation of the guide roll 14 is braked to apply the braking to the feeding of the tape T from the raw fabric reel 13.
The braking free roll 17 has play in the shaft portion and the bearing so as to be separated from the guide roll 14 by 0.5 mm, for example, and the braking free roll 17 is urged by the cylinder device 20 by the extension operation. 17 applies a nip pressure to the guide roll 14.
The cylindrical chuck rotating means 3 rotates the cylindrical body R in the direction opposite to the running direction of the tape T fed out from the original fabric reel 13 so that a load is applied to the first torque motor 16.
[0010]
Rewinder shaft 18, can be connected dissociated to an output shaft of the second torque motor 19 is configured to be able to remove and pull in the axial direction, the central hole of the raw reel 13 are fitted supports. The second torque motor 19 is provided so as to rotate in a direction in which the torque is smaller than that of the first torque motor 16 and braking is applied to the feeding of the tape T from the original fabric reel 13 .
Since the first torque motor 16 unwinds the tape T from the raw fabric reel 13 , the second torque motor 19 creeps in the direction opposite to the direction in which the drive is applied, thereby rotating the tape T. Brake can be given to the feeding. Therefore, applying the braking to the feeding of the tape T is performed by pressing the guide roll 14 with the braking free roll 21 to which the nip pressure is applied by the cylinder device 20 and the joint action of the second torque motor 19.
[0011]
The wiping cloth is a cloth made of polyester or polyester and nylon of ultrafine fibers and having no self-dusting property. As a suitable wiping cloth, there is Savina Minimax (registered trademark) of wiping cloth of Kanebo Co., Ltd., which is an ultrafine fiber of 0.1 denier (thickness of 1 to 5 μm) and is a long fiber. Made of polyester and nylon, the cross section of the yarn is wedge-shaped, dust is taken in, and there is no self-dusting property. In addition, the wiping cloth of Toray Industries, Inc. is a cloth made of ultra-fine filament polyester and has no self-dusting property and is applicable.
The original fabric reel 13 is obtained by winding a tape T of a wiping cloth around a bobbin, and can be purchased and used by Kanebo Co., Ltd. and Toray Industries, Inc.
[0012]
The operation will be described.
The original fabric reel 13 is attached, and the tape T of the wiping cloth is wound around the braking free roll 21, and then wound around the guide rolls 14 and 15, and the tape feeding end is wound around the take-up bobbin 17.
The cylindrical body chuck rotating means 3 chucks the cylindrical body R. Next, the movable table 5 moves to a position corresponding to one end of the cylindrical body R.
The cylinder device 11 is extended to raise the movable bracket 7 with respect to the lift table 6, and then the lift table 6 is lifted so that the cylindrical body R relatively enters the bay portion 7 a of the movable bracket 7. The proximity sensor 12 outputs a detection signal when the gap with the lower surface of the plate becomes 3 mm, for example, and the lift table 6 is raised and stopped.
The first torque motor 16 and the second torque motor 19 are driven almost simultaneously with the raising of the lifting table 6, the cylinder device 20 is extended, tension is applied to the tape T of the wiping cloth, and tape running starts.
When the elevating table 6 is raised, the cylindrical body R comes into contact with the tape T stretched around the guide rolls 14 and 15 and enters the bay portion 7a of the movable bracket 7 relatively. Run in sliding contact with the surface. The rotation of the cylindrical body R is opposite to the running direction of the tape T. Therefore, the tape T runs in sliding contact with the rotating cylindrical body R without loosening the tension, and starts wiping off dirt and oils adhering to the cylindrical body R.
The elevating table 6 stops rising, and after a few seconds have passed, the movable table 5 moves from a position corresponding to one end of the cylindrical body R to a position corresponding to the other end. Accordingly, wiping with the tape T of the wiping cloth is performed from one end of the cylindrical body R to the other end.
Next, after the lifting table 6 is lowered and returned, the cylinder device 11 is reduced and the movable bracket 7 is lowered with respect to the lifting table 6, and the tape T stretched around the guide rolls 14 and 15 is separated from the cylindrical body R. When returning to the horizontally stretched state, the first torque motor 16 and the second torque motor 19 stop driving, the cylinder device 20 is contracted, the tape travel stops, and the traveling platform 5 returns to the original position. Move back.
[0013]
In the conventional method, the alcohol solution in the tank was replaced and the five plate-making rolls were washed with alcohol, coated with a photosensitive film and developed. The first one was 8, the second one was 12, and the third one was 15 The fourth has 36 pinholes and the fifth has 59 pinholes, with an average of 26 pinholes, whereas the present invention is applied to five plate-making rolls with a wiping cloth tape. When wiped, coated with a photosensitive film and developed, the first one was 1, the second was 2, the third was 6, the fourth was 0, and the fifth was 0 pinholes, with an average of 1 Only 8 pinholes were generated.
[0014]
In the above-described embodiment, it was confirmed that a plate roll for gravure printing was wiped with a tape of a wiping cloth and a photosensitizer was applied and no pinhole was generated during development. Plate rolls for gravure printing, flexographic printing, rotary screen printing, or endless offset printing, such as mold type photosensitizers, positive type photosensitizers, ablative black light-shielding agents, and anti-oxidants that coat resists Or to apply uniformly to the photosensitive drum of a laser printer or copying machine to form a good film, it can be applied before coating, causing pinholes adhering to the plate roll or photosensitive drum It is possible to completely wipe off the dirt and oil.
[0015]
【The invention's effect】
According to the cylindrical wiping apparatus for forming the coating film according to claim 1 and claim 2, the wiping cloth is formed on the guide roll provided on both sides of the inlet of the bay portion by forming the bay portion on the movable bracket. Since the cylinder is inserted into the bay by wrapping the tape, the wiping cloth tape is wound around the cylinder for an effective length on any cylinder with the maximum diameter several times the minimum diameter. And the wiping cloth tape travels in the direction opposite to the rotation direction of the cylindrical body, which may cause pinholes attached to the cylindrical body such as the plate-making roll and the photosensitive drum. It is possible to completely wipe off the dirt and oil.
According to the cylindrical wiping apparatus for forming the coating film according to claim 2, the positioning operation of putting the cylindrical body in the bay portion of the movable bracket and winding the tape of the wiping cloth around the cylindrical body for an effective length, Since it adopts a two-stage operation system that earns a large stroke by moving the movable bracket with respect to the lifting table and performs a small stroke and positioning control of the lifting table, the cylindrical body of any diameter whose maximum diameter is several times the minimum diameter The tape is wound around a take-up bobbin that is driven to rotate by a torque motor, and braking is applied to the feeding of the tape from the original reel. It is possible to wind up at a good speed not too early while giving a good wiping.
According to the cylindrical wiping apparatus for forming a coating film according to claim 1 or 2, a negative photosensitive agent, a positive photosensitive agent, an ablationable black light-shielding agent, or an antioxidant for overcoating a resist. Etc. to uniformly apply a coating agent such as gravure printing, flexographic printing, rotary screen printing, or endless offset printing to a photosensitive drum of a laser printer or copying machine Furthermore, it can be applied to completely wiping off dirt and oil that cause pinholes adhering to the plate-making roll and the photosensitive drum before coating.
[Brief description of the drawings]
FIG. 1 shows a front view of a cylindrical wiping apparatus for forming a coating film of the present invention.
FIG. 2 is an enlarged side view of a main part before a wiping operation is performed.
FIG. 3 is an enlarged side view of a main part during a wiping operation.
[Brief description of symbols]
R ... cylindrical body, 1 ... casing, 1a ... roll opening / closing opening, 2 ... roll loading / unloading door, 3 ... cylindrical chuck rotating means, 3a ... driving side chuck, 3b ... movable table, 3c ... tail chuck, 4 ... rail, 5 ... travel platform, 6 ... lifting table, 7 ... movable bracket, 7a ... bay, 8, ... · Linear guide, 9 ··· Female guide, 10 ··· Male guide, 11 ··· Cylinder device, 12 ··· Proximity sensor, 13 ··· Original reel, 14 ··· Guide roll, 15 · ..Guide roll, 16 ... first torque motor, 17 ... winding bobbin, 18 ... rewinder shaft, 19 ... second torque motor, 20 ... cylinder device, 21 ..・ Free roll for braking, T ・ ・ ・ Tape of wiping cloth

Claims (2)

A cylindrical chuck rotating means that rotates by chucking both ends of a cylindrical body such as a plate-making roll or a photosensitive drum for forming a coating film, a moving base that moves along the cylindrical body, and a cylindrical body that is provided on the moving base. An original reel having a movable bracket having a bay portion that can be adjusted to be close to and away from the cylindrical body in a direction perpendicular to the axis of the cylinder and that receives the cylindrical body when approaching the cylindrical body, and is attached to the movable bracket Wiping cloth tape that is not self-dusting is fed from a pair of guide rolls provided at the opposing parts that sandwich the bay part of the movable bracket, and the tape is taken up by a take-up bobbin and fed out. Then, move the movable bracket closer to the cylindrical body, put the cylindrical body in the bay of the movable bracket, and rotate the cylindrical body in the direction opposite to the tape running direction to wind the tape The moving table is slidably in contact with the rotating cylinder and the dirt and oils adhering to the cylinder are wiped, and the moving table is cylindrical so that the wiping with the tape is performed from one end to the other end of the cylinder. A cylindrical wiping device for forming a coating film, wherein the wiping device is configured to move along a body. A cylindrical chuck rotating means that rotates by chucking both ends of a cylindrical body such as a plate-making roll or a photosensitive drum for forming a coating film, a moving base that moves along the cylindrical body, and a cylindrical body that is provided on the moving base. In the direction perpendicular to the axis of the cylinder, the lift table and the lift table so that the position can be adjusted by moving toward and away from the cylinder, and in the direction of approaching and separating from the cylinder by the stroke of the cylinder device A movable bracket with a bay that accepts the cylinder when it moves and approaches the cylinder together with the lifting table, and feeds out a wiping cloth tape that is not self-dusting from the raw reel attached to the movable bracket To the take-up bobbin that is driven to rotate by a torque motor. It is configured to scrape and apply braking to the feeding of the tape from the fabric reel, move the movable bracket closer to the cylindrical body, put the cylindrical body in the bay of the movable bracket, and the cylindrical body is the tape running direction The torque motor rotates in the reverse direction and the tape is taken up on the bobbin. The tape is slidably contacted with the rotating cylindrical body to wipe off dirt and oil on the cylindrical body. A wiping device for a cylindrical body for forming a coating film, wherein the moving base is configured to move along the cylindrical body so as to be performed from one end to the other end of the cylindrical body.

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