JP2006150736A - Work wiping device and marking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work wiping device which can efficiently wipe a silicone film from a work with a surface protective layer without hurting it. <P>SOLUTION: In this work wiping device, a wiping head 40 impregnated with a cleaning liquid is pressed to the work W while being rotatably driven by a wiping motor 18, in a marking position for the work W loaded on a work feeder part 1 which feeds the stacked works W one by one discretely. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a workpiece wiping apparatus and a marking apparatus that secure a marking area by wiping off a film attached to the surface of a workpiece having a surface protective layer.

  For example, in an offset printing machine, after a sheet material is conveyed to a printing unit and an ink image is printed, the printing surface is dried by passing through a UV dryer, and is discharged to a discharge tray by a discharge device. In recent years, due to miniaturization and diversification of electronic components, various workpieces are used as sheet materials, not limited to paper and plastic sheets. For example, printing is performed on various workpieces such as a sheet material to which a primer is applied and a sheet material to which a surface protective film is attached (polarizing plate for a liquid crystal panel). Since the polarizing plate has a direction when it is mounted on the liquid crystal panel, marking indicating the direction is performed.

  When marking is performed on the polarizing plate, the protective film is formed by drawing the film from a long object and pasting it together. Therefore, a release agent containing silicon is usually applied to the surface of the protective film. If this silicon film is formed on the protective film surface, even if marking is performed on the protective film surface, the ink and the seal are repelled and the film is not fixed. For this reason, an operation for securing a marking area is performed by rubbing and wiping off a silicon film at a site where an operator manually marks in advance with a nonwoven fabric impregnated with a cleaning liquid.

  It is not efficient to wipe each of the polarizing plates described above manually with a nonwoven fabric impregnated with a cleaning solution. In addition, marking work (marking, sticking a seal) is performed on the wiped marking area. In other words, there is a problem that workability and productivity are poor. In addition, when marking manually, the marking area and the marking direction vary depending on the workpiece, and it is difficult to determine the appropriateness of the marking, and there is a possibility that the direction of the marking is wrong. Furthermore, when the operation of rubbing and removing the silicon coating is mechanically automated, the protective film and the polarizing plate may be damaged, and the quality may be impaired.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a workpiece wiping apparatus capable of wiping efficiently without damaging the coating film of the workpiece provided with the surface protective layer, and the workpiece wiping. An object of the present invention is to provide a marking device that can efficiently mark using a picking device.

In order to achieve the above object, the present invention comprises the following arrangement.
In a workpiece wiping apparatus that secures a marking area by wiping off the film adhering to the surface of a workpiece having a surface protective layer, the marking position of the workpiece placed on the workpiece supply unit that supplies the stacked workpieces one by one Further, the film is removed by pressing the wiping head impregnated with the cleaning liquid against the work while being rotated by a driving source.
Further, a wiping head is provided on the lower end side of the hollow rotary shaft, a cleaning liquid tank for storing the cleaning liquid is provided on the upper end side, and the cleaning liquid is supplied from the cleaning liquid tank to the wiping head through the shaft.
The wiping head provided at the shaft end of the rotary shaft that is driven to rotate by the drive source is provided with a vertical movement mechanism that moves up and down integrally while rotating.
Further, the wiping head is characterized in that it is urged downward and fitted to the lower end side of the rotating shaft by a preload spring.
The workpiece is a polarizing plate having a protective film bonded to the surface, and the silicon coating applied to the protective film is removed.
Furthermore, the marking device includes a workpiece supply unit including the above-described workpiece wiping device, and a marking unit that forms an ink image in the marking area of the workpiece supplied from the workpiece supply unit. It is characterized by.

If the above-described workpiece wiping device is used, the wiping head impregnated with the cleaning liquid is driven to rotate by the drive source at the marking position of the workpiece placed on the workpiece supply unit that separates and supplies the stacked workpieces one by one. Since the coating is removed by pressing the workpiece as it is, the coating formed on the surface protective layer of the workpiece can be quickly and automatically removed prior to marking, and then the workpiece can be supplied to the marking portion.
In addition, if the cleaning liquid is supplied from the cleaning liquid tank to the wiping head through the hollow rotary shaft, the cleaning liquid supplied to the wiping head can be removed and the continuous operation becomes possible. Since the cleaning liquid is supplied to the wiping head by natural flow through the rotating shaft, the apparatus configuration can be simplified.
Further, since the vertical movement mechanism causes the wiping head to move up and down integrally while rotating, the wiping operation can be performed quickly. Also, since the wiping head is urged and fitted downward by the preload spring on the lower end of the rotating shaft, even if the wiping head is pressed against the work while rotating, the preload spring will release the increased pressing force. However, the wiping operation can be performed with a predetermined pressing force.
In the marking device, since a marking area from which a film such as a release agent is previously removed is formed at a predetermined position of the workpiece, the marking can be performed uniformly and reliably for each workpiece.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best embodiment of a workpiece wiping device and a marking device according to the present invention will be described in detail with reference to the accompanying drawings. The present embodiment can be widely applied to a workpiece wiping apparatus that secures a marking area by wiping off a film adhering to the surface of a workpiece having a surface protective layer. In the following, an offset printer is used as an example of a marking device, and a polarizing plate (work) on which a surface protective film used for a liquid crystal panel is attached is shown as an example of a work, and a release applied to the protective film. The case where the silicon film formed by the agent is removed will be described.

First, a schematic configuration of the offset printing machine will be described with reference to FIG.
In FIG. 9, the workpieces stocked in the workpiece supply unit 1 are separated and supplied one by one, and sent to the marking unit (printing unit) 3 by the feeding device 2 at a predetermined timing. The printing unit 3 can perform color printing as well as monochrome printing on the work. An ink image formed on the blanket based on the image data of the printing plate read by an image scanner (not shown) or the image data of the printing plate drawn on a personal computer or the like, the work moves through the nip portion between the blanket cylinder and the impression cylinder. Printing is performed as it passes. The printing unit 3 may be not only a single color printer but also a multi-function printer for color printing in which a plurality of units are connected. The printing unit 3 may be either a type that uses a mixture of water and ink or an offset printing machine that uses only ink without using water. The work on which the ink image has been printed by the printing unit 3 is cured on the UV curable ink when passing through the UV dryer 4, and then sequentially loaded onto the discharge tray by the work discharge device 5. The operation unit 6 is provided with ten keys and function keys, and various setting data such as the number of printed sheets, print density, print speed, and work size are input.

  Here, the configuration of the control system of the offset printing press will be described with reference to the block diagram of FIG. The control unit 7 includes a CPU (not shown) that outputs a control command to each part of the device based on an input signal inputted from each part of the device, a ROM (not shown) that stores various operation programs, A RAM (not shown) used as a work area for the CPU is provided.

  An encoder output signal (Z phase, A phase, B phase output signal) is input to the control unit 7 from an encoder 8 provided on a rotating shaft of a blanket cylinder (not shown). Further, a detection signal indicating whether or not a feed claw (not shown) has returned to the origin position is input from the feed origin sensor 9 of the feed device 2. Further, a valve opening / closing signal of the air valve is input to the control unit 7 from an air valve origin sensor 10 provided in a vertical movement mechanism described later. Furthermore, various setting data such as the number of printed sheets, printing density, printing speed, and work size are input to the control unit 7 from the operation unit 6. Note that a press-fitting timing detection signal is input to the control unit 7 from a printing pressure origin sensor (not shown), and a detection signal of the workpiece height position loaded on the lifting platform detected by the workpiece height sensor 59 is input.

  The control unit 7 also serves as a drive circuit for the blanket cylinder, and drives and controls a main motor 11 that rotationally drives the blanket cylinder. Further, the control unit 7 outputs a drive signal for the paper feed motor 13 through the paper feed motor driver 12 in accordance with the origin detection signal from the paper feed origin sensor 9. In addition, the control unit 7 outputs a drive signal to the vacuum pump 14 in order to blow air easily on the front end side of the work W loaded on the lifting platform. Further, the control unit 7 opens the air valve 15 according to the origin detection signal of the air valve origin sensor 10 and operates the air cylinder 16 to move the wiping head 40 described later up and down. Further, the control unit 7 drives the wiping motor 18 to rotate through the wiping motor driver 17 prior to the workpiece supply operation. When the detection signal is input from the workpiece height sensor 59 to the control unit 7, the control unit 7 outputs a drive signal to the elevator motor 23 through the elevator motor driver 60 to raise the elevator 19 by a predetermined amount. It has become. The controller 7 outputs a press-fitting motor drive signal through a press-fitting motor driver in response to an origin detection signal from a press-fitting origin sensor (not shown).

Next, the configuration of the workpiece supply unit 1 will be described with reference to FIGS. 4, 6, and 7.
In FIG. 6, a work (polarizing plate) W is stacked on a lifting platform (paper feed tray) 19. Endless chains 22 are installed between the upper and lower wheels 21 on the apparatus frames 20 on both sides. A part of the elevator 19 is connected to the chain 22, and when the elevator motor 23 that can rotate forward and backward is driven to rotate in a predetermined direction, the chain 22 circulates and the elevator 19 is raised or lowered. .

  In FIG. 7A, the suction pad 28 is supported at two places on the support member 24 provided along the width direction of the workpiece W. The suction pad 28 sucks and holds the workpiece W stacked on the lift 19 and supplies it to the transport belt 25 (see FIG. 4C) of the feeding device 2. 7B and 7C, the support member 24 is connected to the distal end side of a swing arm 27 that swings about an arm shaft 26.

  In FIG. 6, when the suction pad 28 performs the air suction operation by the operation of the vacuum pump 14 (see FIG. 8), the rod extends downward and is pressed against the uppermost work W, and the work W is sucked. Then, the rod is drawn upward to hold the workpiece W by suction. The suction pad 28 sucks the uppermost work W stacked on the lifting platform 19 at a site from the front side and supplies the sucked pad 28 to the feeding device 2.

  In FIG. 7C, the apparatus frame 20 is provided with a transmission gear 29 that is driven and transmitted from the printing unit 3 side. The transmission gear 29 includes an eccentric cam 30 and a valve opening / closing cam 31 (FIG. d) is provided coaxially. The eccentric cam 30 is urged so as to always contact the swing arm 27. The swing arm 27 is swung during one rotation of the eccentric cam, and the support member 24 supported on the upper end side of the swing arm 27 is reciprocated. At this time, the suction pad 28 supported by the support member 24 reciprocates between a supply position for transferring the workpiece W to the feeding device 2 and a suction position for holding the workpiece W by suction (see FIG. 4 (c)). The drive transmission from the printing unit 3 to the transmission gear 29 is performed by a clutch switching operation or the like in accordance with the timing of the workpiece supply operation.

  In FIG. 7C, when the transmission gear 29 rotates and the valve arm 32 comes into contact with the valve opening / closing cam 31 (see FIG. 7D), the valve arm 32 resists the bias of the torsion coil spring 33. Rotate clockwise. At this time, the suction valve is broken in vacuum. Therefore, while the transmission gear 29 (eccentric cam 30) rotates once, the swing arm 27 reciprocates around the arm shaft 26, and the work W is sucked and held on the suction pad 28, and the sucked and held. The suction valve is opened and closed so that the suction of the workpiece W is released.

  7A and 7D, the cam shaft 34 of the eccentric cam is provided with a weight 35 corresponding to the eccentric portion coaxially. When the drive transmission from the printing unit 3 side is stopped, the eccentric cam is stopped at a predetermined position by the weight 35. Thereby, when the supply operation such as the replacement of the workpiece W or the stop of the printing operation is temporarily stopped, the suction pad 28 can be automatically returned to the original position again.

  4 (a) to 4 (c), a blower 36 is provided on the front end side of the work W loaded on the elevator 19 so that it can be easily blown to the upper front end of the work W. . Further, a pressing spring 37 is provided on the rear end side of the work W, and urges the work W to be aligned forward. Furthermore, a presser bar 38 is placed on the uppermost work W to prevent the work W from being lifted and prevented from being repeatedly fed.

Next, the configuration of the workpiece wiping device will be described with reference to FIGS. 1 to 3.
In FIG. 2, the workpiece supply unit 1 is provided with a workpiece wiping device 39 that removes the silicon film at the marking position of the workpiece W stacked on the lifting platform 19. The workpiece wiping device 39 keeps the wiping head 40 impregnated with the cleaning liquid at the marking position of the workpiece rotated and driven by the wiping motor 18 as a driving source before the workpiece supply unit 1 sucks and separates the workpiece W. The silicon film is removed by pressing against the workpiece W. The workpiece wiping device 39 is provided on a base member 41 installed on the device frame 20 (see FIG. 6).

  First, the rotation drive mechanism of the wiping head 40 will be described with reference to FIGS. 1 (a) to 1 (d). The wiping head 40 is provided at the lower end of the hollow rotary shaft 42. A cleaning liquid tank 44 is connected to the upper end of the rotating shaft 42 via a joint 43. The cleaning liquid is supplied from the cleaning liquid tank 44 to the wiping head 40 through the shaft. The rotary shaft 42 is rotatably supported by the slide sleeve 46 via a bearing 45. The slide sleeve 46 is integrally fixed to the mounting plate 47. The wiping motor 18 is integrally fixed to the mounting plate 47. A pulley 48 is integrally fitted to the rotating shaft 42, and a motor pulley 49 is fitted to the motor shaft. An endless timing belt 50 is installed between the motor pulley 49 and the pulley 48.

  In FIG. 1C, the wiping head 40 is slidably fitted to the lower end of the rotating shaft 42 via a cylindrical holder sleeve 51. A preload spring 52 is interposed between the upper end of the holder sleeve 51 and the lower end of the slide sleeve 46, and the wiping head 40 is always biased downward. A cylindrical holder 53 is integrally fitted at the lower end of the holder sleeve 51. A core material (felt material) 54 impregnated with a cleaning liquid is fitted into the opening on the lower end side of the holder 53. The felt material 54 is covered with a wiping cloth (nonwoven fabric) 55, and the wiping cloth 55 is fixed to the outer periphery of the holder 53 by an O-ring 56. When the wiping motor 18 is activated, the wiping head 40 rotates with the rotation shaft 42 guided by a bearing 45 provided on the slide sleeve 46 via the timing belt 50. At this time, the wiping head 40 provided at the lower end of the rotating shaft 42 and the cleaning liquid tank 44 provided at the upper end also rotate together.

  Next, a vertical movement mechanism that moves the wiping head 40 up and down while rotating will be described. In FIG. 1C, the base member 41 is provided with a base block 57. A cylindrical sleeve holder 58 is fixed to the base block 57. A slide sleeve 46 is fitted in the sleeve holder 58 so as to be movable up and down.

  In FIG. 1A, the air cylinder 16 is attached and fixed to the base block 57. The tip of the cylinder rod 16 a of the air cylinder 16 is connected to the mounting plate 47. When the air cylinder 16 is operated, the mounting plate 47 connected to the cylinder rod 16a moves up and down. When the mounting plate 47 moves up and down, the slide sleeve 46 and the wiping motor 18 that are integrally fixed to the mounting plate 47 also move together. At this time, the rotating shaft 42 and the wiping head 40 supported by the slide sleeve 46 can move up and down while rotating.

  FIG. 3A shows a state in which the cylinder rod 16a of the air cylinder 16 is advanced (elongated). At this time, the wiping head 40 is held at the upper limit position. FIG. 3B shows a state where the cylinder rod 16a of the air cylinder 16 is retracted (retracted). At this time, the wiping head 40 is held at the lower limit position by the slide sleeve 46 abutting against the sleeve holder 58. Regardless of the position of the wiping head 40, the wiping head 40 can be rotated by rotating the rotating shaft 42 by starting the wiping motor 18.

  The wiping operation of the workpiece wiping device 39 will be described. 3A, when the air valve origin sensor 10 detects that the air valve 15 is at the origin position and the control unit 7 starts the wiping motor 18 through the wiping motor driver 17 (see FIG. 8), the wiping operation is performed. The take-up head 40 rotates around the rotation shaft 42. When the air cylinder 16 is operated in this state, the cylinder rod 16a is retracted downward, and the slide sleeve 46 connected via the mounting plate 47 moves downward. The slide sleeve 46 is guided by the sleeve holder 58 and moves downward until the wiping cloth 55 of the wiping head 40 comes into contact with the uppermost workpiece W. At this time, the wiping head 40 is rotationally driven while the preload spring 52 is compressed and the increased pressure is released even if it comes into contact with the workpiece W before the lower limit position shown in FIG. The wiping operation is performed while the wiping head 40 is rotating and in pressure contact with the workpiece W for a predetermined time. When the wiping is completed, the air cylinder 16 is operated to move the cylinder rod 16a upward, and the slide sleeve 46 linked via the mounting plate 47 moves upward. The slide sleeve 46 moves upward while being guided by the sleeve holder 58, and the wiping head 40 returns to the upper limit position shown in FIG.

  Next, the workpiece supply operation of the workpiece supply unit 1 will be described with reference to FIGS. 4 (a), 4 (b), and 4 (c). In FIG. 4A, the work wiping device 39 starts the wiping operation before the suction head 28 operates. At this time, while the wiping motor 18 is activated and the wiping head 40 is rotated, the air cylinder 16 is operated and moved downward until the wiping head 40 contacts the workpiece W. And in FIG.4 (b), wiping operation | movement is performed because the wiping head 40 rotates for a fixed time (or predetermined rotation speed), pressing the workpiece | work W. FIG. When the wiping operation is completed, the air cylinder 16 is operated in FIG. 4C to separate the wiping head 40 from the workpiece W. Then, the drive is transmitted to the transmission gear 29 and the swing arm 27 swings (see FIG. 7A), and the uppermost work W is sucked and held by the suction pad 28, so that the transport belt 25 and the driven roller 29 are in contact with each other. It is fed into the nip part.

  The wiping operation of the workpiece wiping device 39 will be described with reference to the flowchart of FIG. First, in FIG. 5, before starting the workpiece supply operation, the wiping motor 18 is activated and the wiping head 40 is rotated (step S1). Next, the air cylinder 16 is operated, the cylinder rod 16a is moved backward, and the wiping head 40 is rotated and lowered to the workpiece W (step S2). The controller 7 measures whether or not a set time has elapsed since the lowering operation of the air cylinder 16, and when the set time elapses (step S3), the air cylinder 16 is operated to raise the wiping head 40 (step S4). .

  Next, when the wiping operation is completed, the workpiece supply operation is started, the drive gear is transmitted to the transmission gear 29, the swing arm 27 swings, and the uppermost workpiece W is sucked and held by the suction pad 28, and the conveyor belt. 25 and the driven roller 29 (step S5; see FIG. 4C). When one workpiece W is fed, the suction pad 28 is released from suction and returns to its original position. Next, it is determined whether or not the set number of sheets has been fed (step S6). If the set number of sheets has not been reached, the process returns to step S2 to start the wiping operation for the next workpiece W, and the set number of sheets has been reached. If so, the supply operation is terminated (feed stop). The loading amount of the workpiece W loaded on the lifting platform 19 is detected by the workpiece height sensor 59 (see FIG. 8), and when the predetermined amount is fed, the elevator motor 23 is activated to rise. Yes.

  In FIG. 9, the wiped workpiece W is sent to the printing unit 3 by the feeding device 2 at a predetermined timing, and marking (printing of arrows, characters, symbols, etc.) is performed on the wiped marking area. The workpiece W marked by the printing unit 3 is discharged to the workpiece discharge device 5 after UV drying is performed by the UV dryer 4.

  The workpiece is not limited to the polarizing plate but may be another member, and the marking device is not limited to the offset printer, and other marking methods may be employed.

It is the front view of a workpiece | work wiping apparatus, the right view, arrow AA sectional drawing, and an upper view. It is a perspective view of a workpiece | work wiping apparatus. It is explanatory drawing which shows the upper limit position and lower limit position of a wiping head. It is state explanatory drawing of a workpiece | work supply operation | movement. It is a flowchart which shows the workpiece | work supply operation | movement of workpiece | work supply operation | movement. It is a perspective view of a workpiece | work supply part. It is the front view, left-right side view, and top view of a workpiece | work supply part. It is a block diagram which shows the structure of the control system of an offset printing machine. It is explanatory drawing of an offset printing machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work supply part 2 Feeder 3 Printing part 4 UV dryer 5 Work discharge apparatus 6 Operation part 7 Control part 8 Encoder 9 Paper feed origin sensor 10 Air valve origin sensor 11 Main motor 12 Paper feed motor driver 13 Paper feed motor 14 Vacuum pump DESCRIPTION OF SYMBOLS 15 Air valve 16 Air cylinder 17 Wiping motor driver 18 Wiping motor 19 Lifting stand 20 Apparatus frame 21 Wheel 22 Chain 23 Elevator motor 24 Support member 25 Conveying belt 26 Arm shaft 27 Oscillating arm 28 Adsorption pad 29 Transmission gear 30 Eccentric cam Reference Signs List 31 Valve cam 32 Valve arm 33 Torsion coil spring 34 Cam shaft 35 Weight 36 Air blower 37 Pressing spring 38 Pressing bar 39 Work wiping device 40 Wiping head 41 Base member 42 Rotating shaft 43 Joint 4 Solution tank 45 bearing 46 sliding sleeve 47 the mounting plate 48 pulley 49 pulley 50 timing belt 51 holder sleeve 52 the preload spring 53 holder 54 felt material 55 a wiping cloth 56 O-ring 57 base block 58 sleeve holder 59 work height sensor 60 elevator motor driver

Claims (6)

In the workpiece wiping device that secures the marking area by wiping off the film attached to the surface of the workpiece having the surface protective layer
The coating is removed by pressing the wiping head impregnated with the cleaning solution against the workpiece while rotating it with the drive source at the marking position of the workpiece placed on the workpiece supply unit that supplies the stacked workpieces one by one. A workpiece wiping device characterized by:   The wiping head is provided at the lower end side of the hollow rotary shaft, the cleaning liquid tank for storing the cleaning liquid is provided at the upper end side, and the cleaning liquid is supplied from the cleaning liquid tank to the wiping head through the shaft. The workpiece wiping device described.   2. The workpiece wiping device according to claim 1, further comprising a vertical movement mechanism for vertically moving the driving source and a wiping head provided at the shaft end of the rotary shaft rotated by the driving source while rotating. Take-off device.   2. The workpiece wiping apparatus according to claim 1, wherein the wiping head is urged downward and fitted by a preload spring to the lower end side of the rotating shaft.   2. The workpiece wiping apparatus according to claim 1, wherein the workpiece is a polarizing plate having a protective film bonded to the surface, and the silicon coating applied to the protective film is removed. A workpiece supply unit including the workpiece wiping device according to any one of claims 1 to 5, and a marking unit that forms an ink image in a wiping marking area of the workpiece supplied from the workpiece supply unit. A marking device characterized by that.

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