JP2013075403A - Dust removing device for printing machine and printing machine including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust removing device for a printing machine and a printing machine including the same whereby dust attached and transferred to the rubber cylinder can be removed in a continuous manner without interrupting printing.SOLUTION: As the controlling device 250 activates the air cylinder 213 to allow the main adhesion roller 210 to abut on the rubber cylinder 203, the air cylinder 240 is activated to allow the secondary adhesion roller 230 to separate from the rubber cylinder 203, and the air cylinder 213 is activated to allow the main adhesion roller 210 to separate from the rubber cylinder 203 to abut on the washing band 222 on the pad 221. Following that, the air cylinder 240 is activated to abut the secondary adhesion roller 230 on the rubber cylinder 203. The main adhesion roller 210 is provided to make the θ1 between the plane S1 that connects the shaft center Op of the impression cylinder 202 and the shaft center Oa of the main adhesion roller 210 and the horizontal plane S0 from θ2 between the plane S2 that connects the shaft center Op of the impression cylinder 202 and the shaft center Ob of the rubber cylinder 203 and the horizontal plane S0.

Description

  The present invention relates to a dust removing device that removes dust such as paper dust attached to a sheet fed to a printing unit of a printing machine and powder for preventing set-off, and a printing machine including the dust removing device.

  As a dust removing device for removing dust such as paper dust attached to a sheet fed to a printing unit of a printing press or powder for preventing set-off, it is described in, for example, Patent Document 1 below. Thus, by supplying only dampening water to the blanket surface of the rubber cylinder of the printing unit located on the most upstream side in the sheet distribution direction of the printing press, the dust is attached to the blanket surface of the rubber cylinder. It is known that a dust removing roller is used to transfer to an adhesive surface for removal.

  Further, for example, in the following Patent Document 2 and the like, two sets of cleaning rolls and cleaning rolls are provided at a position facing the conveyance path of the printing substrate conveyed to the printing roll, and dust on the surface is applied to the printing substrate on one side. When cleaning with the cleaning roll of one set, wash the cleaning roll of the other set with the cleaning roll, and clean the dust on the surface of the printing substrate with the cleaning roll of the other set. By using these cleaning rolls alternately as if washing with a cleaning roll, the cleaning roll is automatically washed without stopping the printing press, and the dust on the surface of the printing substrate is continuously removed. It is disclosed that it can be removed.

Japanese Utility Model Publication No. 07-037871 Japanese Patent Laid-Open No. 01-258951

  However, in the dust removal device described in Patent Document 1, when a large amount of dust is transferred to the surface of the dust removal roller and the adhesiveness of the surface of the dust removal roller is reduced, printing is temporarily suspended. Since the surface of the dust removal roller must be cleaned to restore the adhesiveness of the surface of the dust removal roller, the productivity has been reduced.

  Moreover, in the dust removal apparatus described in Patent Document 2, since both sets of cleaning rolls have the same diameter, these cleaning rolls deteriorate early or completely remove dust. As a result, the productivity is reduced as in the case of the dust removing apparatus described in Patent Document 1.

  More specifically, there are two types of paper dust that occupy the main part of the garbage: those adhering to the surface of the paper, and short paper fibers spilling from the cut surface of the paper. Paper dust generated from the cut surface of the paper is concentrated on the edge of the paper. In order to continuously remove such paper dust generated concentrated on the edge of the paper, it is necessary to strongly press the cleaning roll. For this reason, a cleaning roll will deteriorate early.

  On the other hand, if the pressing force of the cleaning roll is weakened so as to suppress the early deterioration of the cleaning roll, the paper dust that is concentrated on the edge of the paper cannot be completely removed. It will be necessary to temporarily suspend, resulting in a decrease in productivity.

  In particular, when printing a sheet, not only the edge of the paper is larger than the roll paper, but also the printing is performed while conveying the sheet by holding the edge on the downstream side in the sheet conveying direction (the gripping side) with a gripping nail or the like. For this reason, the upstream side (butt side) on the upstream side in the conveying direction flutters and generates a large amount of paper dust, and the productivity is likely to be further greatly reduced.

  Accordingly, the present invention provides a dust removing device for a printing press that can continuously remove dust adhering to a rubber cylinder without interrupting printing, and a printing press including the same. Objective.

  In order to solve the above-described problems, a dust removing device for a printing press according to the present invention is supported by an eccentric bearing that holds and conveys a sheet and an eccentric bearing so as to be able to contact and separate from the impression cylinder. In a dust removing device for a printing press comprising a rubber cylinder and a first adhesive roller that is in contact with the rubber cylinder and has adhesiveness on an outer peripheral surface, the first adhesive roller is opposed to the rubber cylinder. A first adhesive roller moving means for moving the first adhesive roller so as to contact and separate; and the first adhesive roller in contact with an outer peripheral surface of the first adhesive roller separated from the rubber cylinder A first adhesive roller cleaning means for cleaning the outer peripheral surface of the second adhesive roller, a second adhesive roller that is in contact with the rubber cylinder and has adhesiveness on the outer peripheral surface, and the second adhesive roller against the rubber cylinder. The second adhesive b A second adhesive roller moving means for moving the rubber, a cam attached to the eccentric bearing for supporting the rubber cylinder, and the rubber of the second adhesive roller provided in the second adhesive roller moving means. As the first adhesive roller moving means is actuated so that the cam follower abutting on the cam surface of the cam as it comes into contact with the cylinder and the first adhesive roller in contact with the rubber cylinder Then, the second adhesive roller moving means is operated so as to separate the second adhesive roller from the rubber cylinder, and the first adhesive roller is separated from the rubber cylinder. As the first adhesive roller moving means is operated so as to contact the adhesive roller cleaning means, the second adhesive roller is brought into contact with the rubber cylinder. Create transportation means Control means, and an angle θ1 formed by a plane S1 connecting the axis Op of the impression cylinder and the axis Oa of the first adhesive roller and the horizontal plane S0, the axis Op of the impression cylinder and the axis The first adhesive roller is arranged so that an angle θ2 formed by a plane S2 connecting the axis Ob of the rubber cylinder and a horizontal plane S0 is different.

  Further, a dust removing device for a printing press according to the present invention includes a pressure drum, a rubber drum that can come into contact with and away from the pressure drum, and a first pressure-sensitive adhesive that is in contact with the rubber drum and has adhesiveness on an outer peripheral surface. And a first adhesive roller moving means for moving the first adhesive roller so as to move the first adhesive roller against and away from the rubber cylinder. A first adhesive roller cleaning means for cleaning the outer peripheral surface of the first adhesive roller in contact with the outer peripheral surface of the first adhesive roller separated from the rubber cylinder; A second adhesive roller having adhesiveness on the outer peripheral surface and having a diameter smaller than the diameter of the first adhesive roller, and the second adhesive roller in contact with and away from the rubber cylinder. Second adhesive that moves the second adhesive roller When the first adhesive roller moving means is operated so that the first adhesive roller is brought into contact with the rubber cylinder, the second adhesive with respect to the rubber cylinder The second adhesive roller moving means is actuated so as to separate the rollers, and the first adhesive roller cleaning means is separated from the rubber cylinder and brought into contact with the first adhesive roller cleaning means. When the one adhesive roller moving means is operated, the second adhesive roller is pressed against the rubber cylinder at a pressure larger than the pressure at which the first adhesive roller is in contact with the rubber cylinder. The second adhesive roller is brought into contact with the rubber cylinder in a shorter time than the time when the first adhesive roller is brought into contact with the rubber cylinder. Actuating the adhesive roller moving means Characterized in that it comprises a that control means.

  According to another aspect of the present invention, there is provided a printing press including the above-described dust removing device for a printing press.

  According to the dust removing device for a printing press according to the present invention, the control means operates the first adhesive roller moving means to bring the first adhesive roller into contact with the rubber cylinder, and the rubber cylinder The second adhesive roller moving means is operated so that the second adhesive roller is separated from the first adhesive roller, and the first adhesive roller is separated from the rubber cylinder so as to contact the first adhesive roller cleaning means. When the first adhesive roller moving means is operated, the second adhesive roller moving means is operated so that the second adhesive roller is brought into contact with the rubber cylinder. Separated from the rubber cylinder, it can be cleaned by the first adhesive roller cleaning means, and the rubber cylinder is regenerated by the second adhesive roller instead of the first adhesive roller during cleaning of the first adhesive roller. So you can on the rubber barrel Wearing the dust, the printing can be removed continuously without interrupting the.

  Also, an angle θ1 formed between a plane S1 connecting the axis Op of the impression cylinder and the axis Oa of the first adhesive roller and the horizontal plane S0, and a plane connecting the axis Op of the impression cylinder and the axis Ob of the rubber cylinder. Since the first adhesive roller is in contact with the rubber cylinder so that the angle θ2 formed by S2 and the horizontal plane S0 is different, it corresponds to the thickness of the sheet of the rubber cylinder relative to the impression cylinder by the rotation of the eccentric bearing. Position adjustment and contact / separation (detachment) with respect to the impression cylinder can be performed.

  In addition, by bringing the cam follower into contact with the cam surface of the cam, the contact state of the second adhesive roller to the outer peripheral surface of the rubber cylinder is set, so the position of the rubber cylinder changes due to the rotation of the eccentric bearing. However, the second adhesive roller can always be pressed against the outer peripheral surface of the rubber cylinder with a constant force, and the rubber cylinder has a dust removing ability to transfer and collect the dust adhering to the rubber cylinder with the second adhesive roller. It can always be kept constant without being influenced by the position.

  In addition, the second adhesive roller has a diameter smaller than the diameter of the first adhesive roller, and the control means separates the first adhesive roller from the rubber cylinder and contacts the first adhesive roller cleaning means. As the first adhesive roller moving means is actuated so as to be in contact with the rubber cylinder, the pressure applied to the rubber cylinder is greater than the pressure at which the first adhesive roller is in contact with the rubber cylinder. The second adhesive roller is moved so that the second adhesive roller contacts the rubber cylinder in a shorter time than the time when the first adhesive roller is in contact with the rubber cylinder. By operating the means, the first adhesive roller contacts the rubber cylinder with a small pressure for a long time, thereby removing dust while suppressing deterioration of the rubber cylinder and the first adhesive roller itself. The adhesive roller of the In this way, the paper that was concentrated on the edge of the sheet and could not be completely removed by the first adhesive roller while minimizing the deterioration of the rubber cylinder and the second adhesive roller itself. Since the powder is removed, dust adhering to the rubber cylinder can be continuously removed without interrupting printing, and productivity can be improved.

1 is an overall schematic configuration diagram of a main embodiment of a sheet-fed printing press using a dust removing device for a printing press according to the present invention. It is an extraction enlarged view of the principal part of the dust removal apparatus of the sheet-fed printing machine of FIG. FIG. 5 is an enlarged view of another main part of the dust removing device of the sheet-fed printing press of FIG. 1. FIG. 4 is a partially cutaway view seen from the direction of arrow IV in FIG. 2. It is a control block diagram of the principal part of the dust removal apparatus of FIG.

  DESCRIPTION OF EMBODIMENTS Embodiments of a dust removing device for a printing press and a printing press equipped with the same according to the present invention will be described below with reference to the drawings. is not.

[Main embodiments]
A main embodiment of a dust removing device for a printing press and a printing press equipped with the same according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the paper feed device 100 is in communication with the base end side of a feeder board 102 that feeds the sheets 1 that are sheets stacked on the paper feed tray 101 one by one. A swing device 103 is provided on the front end side of the feeder board 102 to deliver the sheets 1 on the feeder board 102 to the transfer cylinder 201 one by one.

  The pressure drum 202 of the dust removing device 200 is in contact with the transfer drum 201. A rubber cylinder 203 is in contact with the impression cylinder 202. A transfer drum 301 is in contact with the pressure drum 202 on the downstream side in the rotation direction of the pressure drum 202 with respect to the contact position of the pressure drum 202 with the rubber drum 203. The transfer drum 301 is in contact with the pressure drum 302 of the first printing unit 300. A rubber cylinder 303 is in contact with the impression cylinder 302. A plate cylinder 304 is in contact with the rubber cylinder 303. In the vicinity of the plate cylinder 304, there are a first ink supply device (not shown) for supplying the first ink to the plate cylinder 304 and a water supply device (not shown) for supplying dampening water to the plate cylinder 304. Each is arranged.

  A transfer drum 401 is in contact with the pressure drum 302 on the downstream side in the rotation direction of the pressure drum 302 with respect to the contact position of the pressure drum 302 with the rubber drum 303. The transfer drum 401 is in contact with the pressure drum 402 of the second printing unit 400. A rubber cylinder 403 is in contact with the impression cylinder 402. A plate cylinder 404 is in contact with the rubber cylinder 403. In the vicinity of the plate cylinder 404, there is a second ink supply device (not shown) for supplying the second ink to the plate cylinder 404 and a water supply device (not shown) for supplying dampening water to the plate cylinder 404. Each is arranged.

  A transfer drum 501 is in contact with the pressure drum 402 on the downstream side in the rotation direction of the pressure drum 402 with respect to the contact position of the pressure drum 402 with the rubber drum 403. The transfer drum 501 is in contact with the impression drum 502 of the third printing unit 500. A rubber cylinder 503 is in contact with the impression cylinder 502. A plate cylinder 504 is in contact with the rubber cylinder 503. In the vicinity of the plate cylinder 504, there is a third ink supply device (not shown) for supplying the third ink to the plate cylinder 504 and a water supply device (not shown) for supplying dampening water to the plate cylinder 504. Each is arranged.

  A transfer drum 601 is in contact with the pressure drum 502 on the downstream side in the rotation direction of the pressure drum 502 with respect to the contact position of the pressure drum 502 with the rubber drum 503. The transfer drum 601 is in contact with the impression drum 602 of the fourth printing unit 600. A rubber cylinder 603 is in contact with the impression cylinder 602. A plate cylinder 604 is in contact with the rubber cylinder 603. In the vicinity of the plate cylinder 604, a fourth ink supply device (not shown) for supplying the fourth ink to the plate cylinder 604 and a water supply device (not shown) for supplying dampening water to the plate cylinder 604 are provided. Each is arranged.

  A discharge drum 701 of the discharge device 700 is in contact with the pressure drum 602 on the downstream side in the rotation direction of the pressure drum 602 with respect to the contact position of the pressure drum 602 with the rubber drum 603. A sprocket (not shown) is coaxially provided on the discharge cylinder 701. An endless paper discharge chain 704 is attached to the sprocket. A plurality of hooks (not shown) having grippers are attached at predetermined intervals. The paper discharge chain 704 is stretched over the sprocket 703. A plurality of paper discharge trays 705 are disposed below the paper discharge chain 704.

  As shown in FIGS. 2 to 4, the rubber cylinder 203 of the dust removing device 200 is rotatably supported by an eccentric bearing 205 according to the present invention via a bearing 204. The eccentric bearing 205 is rotatably supported with respect to the frame 10 of the printing press. An arm 205 a is projected from the eccentric bearing 205. One end side of the link plate 206 is pin-coupled to the distal end side of the arm 205 a of the eccentric bearing 205.

  One end of an L-shaped lever 207 is pin-coupled to the other end of the link plate 206, and the lever 207 has a support shaft in which an L-shaped bent portion is supported by a frame of a printing press. 208 is rotatably supported. The other end side of the lever 207 is rotatably connected to the tip end side of the rod 209a of a stepping motor 209 that moves the rod 209a along the axial direction. The base end side of the stepping motor 209 is supported by the frame 10 of the printing press.

  That is, when the stepping motor 209 is operated to move the rod 209a in the axial direction, the lever 207 swings, and the arm 205a of the eccentric bearing 205 swings via the link plate 206. As a result, the eccentric bearing 205 is rotated so that the rubber cylinder 203 can be brought into contact with and separated from the outer peripheral surface of the impression cylinder 202.

  As shown in FIG. 2, the rubber cylinder 203 has a main adhesive roller 210 (for example, a diameter of 199 mm) which is a first adhesive roller having adhesiveness on the outer peripheral surface. An angle θ1 between a plane S1 connecting Op and the axis Oa of the main adhesive roller 210 and the horizontal plane S0, and a plane S2 connecting the axis Op of the impression cylinder 202 and the axis Ob of the rubber cylinder 203 and a horizontal plane. The contact is made so that the angle θ2 formed with S0 is different.

  The main adhesive roller 210 is rotatably supported by an eccentric bearing 212 via a bearing 211. The eccentric bearing 212 is supported so as to be rotatable with respect to the frame 10. An arm 212 a is projected from the eccentric bearing 212. The distal end side of the air cylinder 213 is pin-coupled to the distal end side of the arm 212 a of the eccentric bearing 212. A base end side of the air cylinder 213 is supported with respect to the frame 10.

  That is, the outer peripheral surface of the main adhesive roller 210 is brought into contact with the outer peripheral surface of the rubber cylinder 203 by expanding and contracting the air cylinder 213 and rotating the eccentric bearing 212 via the arm 212a. The main adhesive roller 210 can be moved to switch its position so that it can be separated from the outer peripheral surface of the rubber cylinder 203.

  A pad 221 is disposed in the vicinity of the outer peripheral surface of the main adhesive roller 210 so as to face the outer peripheral surface of the main adhesive roller 210, and the pad 221 is disposed on the outer peripheral surface of the main adhesive roller 210. On the other hand, it is movable so that it can contact and separate. In the vicinity of the pad 221, a feeding roller 223 wound with a cleaning band 222 impregnated with a cleaning liquid and a take-up roller 224 for collecting the cleaning band 222 fed from the feeding roller 223 are disposed. The cleaning band 222 passes through the surface of the pad 221 facing the main adhesive roller 210.

  In the vicinity of the arm 212 a of the eccentric bearing 212, a rotation shaft 214 that is rotatably supported with respect to the frame 10 is disposed. A disc-shaped cam 215 is eccentrically attached to the rotating shaft 214. A cam follower 216 that abuts on the cam surface (outer peripheral surface) of the cam 215 is provided in the middle in the longitudinal direction of the arm 212 a of the eccentric bearing 212.

  That is, when the main adhesive roller 210 is brought into contact with the outer peripheral surface of the rubber cylinder 203 by the operation of the air cylinder 213, the cam 215 is rotated by rotating the rotation shaft 214. Since the cam follower 216 moves and the eccentric bearing 212 rotates through the arm 212a, the pressing force of the main adhesive roller 210 on the rubber cylinder 203 can be adjusted. is there.

  As shown in FIGS. 2 and 4, in the vicinity of the outer peripheral surface of the rubber cylinder 203, a rotation shaft 231 that is rotatably supported with respect to the frame 10 is disposed. One end side of a pair of brackets 232 having a substantially L shape is fixedly supported on the rotating shaft 231. On the opposite surface side of the pair of brackets 232, a notch groove 232 a is formed in the longitudinal direction along the radial direction of the rubber cylinder 203.

  In the vicinity of the bracket 232, support frames 234 connected to both ends of a support stay 233 that is oriented in the longitudinal direction in the axial direction of the rubber cylinder 203 are disposed. On the side of the support frame 234 facing the bracket 232, an engagement roller 235 and an engagement bar 236 that are engaged in the notch groove 232a of the bracket 232 are attached via support members 235a and 236a, respectively. The support frame 234 is supported on the bracket 232 so as to be slidable along the longitudinal direction of the notch groove 232a via the engagement roller 235 and the engagement bar 236. .

  On the front end side between the paired support frames 234 (end side on the rubber cylinder 203 side), the outer peripheral surface is adhesive and has a diameter smaller than the diameter of the main adhesive roller 210 (for example, main A sub-adhesive roller 230, which is a second adhesive roller having a diameter of about 199 mm, which is about half of the diameter of 199 mm, is supported by the rubber cylinder 203 so as to be rotatable in the axial direction. At the base end side of the support frame 234, a stop pin 237 that is axially oriented in the axial direction of the sub-adhesive roller 230 is supported so as to be slidable in the axial direction with respect to the support frame 234. .

  On the base end side of the bracket 232, a fitting hole 232b that is detachably fitted to the distal end side of the retaining pin 237 is formed. A compression coil spring 238 is provided between the support frame 234 and the stop pin 237 to bias the support frame 234 in a direction in which the distal end side of the stop pin 237 protrudes.

  That is, the support frame 234 is disposed so that the engagement roller 235 and the engagement bar 236 are placed in the notch groove 232a of the bracket 232, and the front end side of the notch groove 232a of the bracket 232 is disposed. By sliding the support frame 234 along the notch groove 232a so that the engagement roller 235 comes into contact with the end portion, the support frame 234, that is, the auxiliary frame is moved with respect to the bracket 232. The adhesive roller 230 can be positioned at a predetermined position, and the support frame 234, that is, the bracket 232 is fitted to the bracket 232 by fitting the stopper pin 237 into the fitting hole 232b of the bracket 232. While the sub-adhesive roller 230 can be fixed at a predetermined position, The engaging roller 235 and the engagement roller 235 and the engagement member 235 are pulled out of the fitting hole 232b of the bracket 232 against the urging force of the coil spring 238 to separate the support frame 234 from the bracket 232. By moving the bar 236 on the notch groove 232 a of the bracket 232, the auxiliary adhesive roller 230 can be removed from the bracket 232 together with the support frame 234 and the like.

  One end of a lever 239 is connected and fixed to the rotating shaft 231. The other end side of the lever 239 is pin-coupled to the front end side of the air cylinder 240. The base end side of the air cylinder 240 is supported with respect to the frame 10.

  That is, when the air cylinder 240 is expanded and contracted, the rotation shaft 231 is rotated via the lever 239, the bracket 232 is swung, and the auxiliary adhesive roller 230 is moved via the support frame 234. The rubber cylinder 203 can be brought into contact with and separated from the outer peripheral surface.

  Further, a cam 241 according to the present invention is attached to the eccentric bearing 205 with the cam surface directed to the rotating shaft 231 side. At the bent portion of the bracket 232, the base end side of the support plate 243 is fixed so that the distal end side protrudes from the bracket 232. A cam follower 242 according to the present invention that can come into contact with the cam surface of the cam 241 is attached to the front end side of the support plate 243.

  That is, the cam follower 242 comes into contact with the cam surface of the cam 241 as the sub-adhesive roller 230 comes into contact with the outer peripheral surface of the rubber cylinder 203 by the operation of the air cylinder 240, The pressing force of the sub-adhesive roller 230 against the outer peripheral surface of the rubber cylinder 203 can be kept constant.

  Further, as shown in FIG. 5, the pad moving means 225 for moving the stepping motor 209, the air cylinders 213, 240 and the pad 221 in contact with and away from the outer peripheral surface of the main adhesive roller 210 is a control means. It is electrically connected to the output unit of a certain control device 250. The input unit of the control device 250 includes a sheet thickness input unit 251 for inputting the thickness of the sheet 1 and the number of sheets 1 fed from the sheet feeder 100, that is, the main adhesive roller. A counter 252 that counts the number of sheets 1 from which dust has been removed in 210, a timer 253 that measures time, and a cleaning start time of the main adhesive roller 210 (the number of sheets 1 from which dust is removed) are input. The cleaning start timing input means 254 is electrically connected to each other, and the control device 250 controls the operation of the stepping motor 209 based on the information from the paper thickness input means 251 and the counter. 252, the operation of the air cylinders 213 and 240 and the pad moving means 225 is controlled based on information from the timer 253 and the cleaning timing input means 254. So that the can (details will be described later).

  In this embodiment, the link plate 206, the lever 207, the support shaft 208, the stepping motor 209, and the like constitute an eccentric bearing rotating means for rotating the eccentric bearing 205, and the bearing 211, The eccentric bearing 212, the air cylinder 213 and the like constitute a first adhesive roller moving means, and the rotating shaft 214, the cam 215, the cam follower 216 and the like constitute a first adhesive roller position adjusting means. The pad 221, the cleaning band 222, the feeding roller 223, the take-up roller 224, the pad moving means 225, etc. constitute a first adhesive roller cleaning means, and the support stay 233, the support frame 234, etc. The second adhesive roller holding means for rotatably holding the sub adhesive roller 230 And a second adhesive roller detachably supporting the second adhesive roller holding means by the bracket 232, the engagement roller 235, the engagement bar 236, the retaining pin 237, the compression coil spring 238, and the like. The second adhesive roller moving means is constituted by the second adhesive roller holding means, the second adhesive roller support means, the rotating shaft 231, the lever 239, the air cylinder 240 and the like. It is composed.

  Next, the operation of the sheet-fed printing press according to this embodiment provided with such a dust removing device 200 will be described.

  Initially, the dust removing apparatus 200 contracts the air cylinder 213 so that the main adhesive roller 210 is brought into contact with the rubber cylinder 203 (for example, nip pressure: 2 mm), and the cam follower 216 contacts the cam 215. At the same time, the air cylinder 240 extends so as to separate the sub-adhesive roller 230 from the rubber cylinder 203.

  Then, the sheet thickness of the sheet 1 loaded on the sheet feeding table 101 of the sheet feeding device 100 is input to the sheet thickness input unit 251, and the main part of the dust removing device 200 is input by the cleaning start timing input unit 254. When the cleaning start time of the adhesive roller 210 (the number of sheets 1 from which dust is removed) is input, the control device 250, based on information from the paper thickness input means 251, the rubber of the dust removal device 200. The stepping motor 209 is operated so that the cylinder 203 is pressed against the impression cylinder 202 with a pressing force corresponding to the thickness of the sheet 1.

  At this time, an angle θ1 between a plane S1 connecting the axis Op of the impression cylinder 202 and the axis Oa of the main adhesive roller 210 and the horizontal plane S0, the axis Op of the impression cylinder 202, and the rubber cylinder 203 Since the main adhesive roller 210 is in contact with the rubber cylinder 203 so that the angle θ2 formed by the plane S2 connecting the axis Ob and the horizontal plane S0 is different, the rotation of the eccentric bearing 205 causes the rotation. Position adjustment corresponding to the thickness of the sheet 1 with respect to the impression cylinder 202 and contact / separation (detachment) with respect to the impression cylinder 202 can be performed.

  Next, when the sheets 1 on the paper feed tray 101 of the paper feeder 100 are fed one by one onto the feeder board 102 and delivered one by one to the transfer cylinder 201 by the swing device 103, The leaf paper 1 is transferred from the transfer drum 201 to the pressure drum 202 of the dust removing device 200, and passes through a contact position between the pressure drum 202 and the rubber drum 203, whereby paper dust and set-off are transferred. After dust such as prevention powder adheres to the rubber cylinder 203 and is removed, the dust is transferred to the impression cylinder 302 of the first printing unit 300 via the transfer cylinder 301 and supplied to the plate cylinder 304. One ink is transferred through the rubber cylinder 303 and printed.

  Subsequently, the sheet 1 is transferred to the impression cylinder 402 of the second printing unit 400 via the transfer cylinder 401, and the second ink supplied to the plate cylinder 404 is transferred via the rubber cylinder 403. Printed, transferred to the impression cylinder 502 of the third printing unit 500 through the transfer cylinder 501, transferred to the plate cylinder 504, transferred through the rubber cylinder 503, printed, and transferred to the transfer cylinder 601. After the fourth ink supplied to the plate cylinder 604 is transferred through the rubber cylinder 603 and printed, the paper is discharged from the paper discharge device 700. The paper is transferred to the drum 701, transferred to the claw hooks of the paper discharge chain, conveyed, and discharged onto the paper discharge table 705.

  On the other hand, the dust removing device 200 that has removed the dust from the sheet 1 transfers and collects the dust adhering to the rubber cylinder 203 onto the outer peripheral surface of the main adhesive roller 210, thereby the rubber cylinder 203. Is regenerated, and the dust adhering to the newly fed sheet 1 is attached again and removed.

  When the number of sheets 1 from which dust has been removed by the rubber cylinder 203 reaches the number input by the cleaning start timing input means 254, the control device 250, based on the information from the counter 252, By controlling the air cylinder 240 to contract, the sub-adhesive roller 230 is pressed against the rubber cylinder 203 with a pressure (pressing force) greater than the contact pressure (pressing force) of the main adhesive roller 210 against the rubber cylinder 203. The main adhesive roller 210 is moved away from the rubber cylinder 203 by controlling the expansion of the air cylinder 213 after a predetermined time has passed (for example, nip pressure: 2 mm which is the same as the main adhesive roller 210). Later, the pad moving means 225 is operated so that the cleaning band 222 on the pad 221 is brought into contact with the main adhesive roller 210. Control to.

  As a result, the sub-adhesive roller 230 transfers and collects the dust adhering to the rubber cylinder 203 to regenerate the rubber cylinder 203 in place of the main adhesive roller 210, while the main adhesive roller 210 The collected dust is cleaned and removed by the cleaning zone 222 for a predetermined time.

  At this time, when the cam follower 242 contacts the cam surface of the cam 241, the contact state of the sub-adhesive roller 230 to the outer peripheral surface of the rubber cylinder 203 is set. Even if the position of the rubber cylinder 203 changes due to the movement, the sub-adhesive roller 230 is always pressed against the outer peripheral surface of the rubber cylinder 203 with a constant force.

  When the cleaning of the main adhesive roller 210 by the cleaning band 222 is performed for a predetermined time in this manner, the control device 250 determines that the cleaning of the main adhesive roller 210 has been completed based on the information from the timer 253. Then, after controlling the operation of the pad moving means 225 so that the cleaning band 222 on the pad 221 is separated from the main adhesive roller 210, the main adhesive roller 210 is brought into contact with the rubber cylinder 203 again. (For example, nip pressure: 2 mm) The air cylinder 213 is controlled to be shortened, and after a predetermined time has elapsed, the air cylinder 240 is controlled to extend so that the auxiliary adhesive roller 230 is separated from the rubber cylinder 203.

  At this time, the contact time of the sub-adhesion roller 230 with respect to the rubber drum 203 is shorter than the contact time of the main adhesion roller 210 with respect to the rubber drum 203. 210 cleaning time and the like are set.

  Accordingly, the dust removed from the sheet 1 is transferred and recovered again on the rubber cylinder 203 by the main adhesive roller 210 whose adhesive performance has been recovered.

  When the printing is finished, the locking pin 237 is pulled out from the fitting hole 232b of the bracket 232, and the engagement roller 235 and the engagement bar 236 are moved so that the support frame 234 is separated from the bracket 232. By moving the bracket 232 on the notch groove 232a and removing the auxiliary adhesive roller 230 together with the support frame 234 and the like from the bracket 232, the auxiliary adhesive roller 230 is washed to recover the adhesive performance. Can do.

  After the sub-adhesive roller 230 is cleaned in this manner, the support frame 234 is disposed again so that the engagement roller 235 and the engagement bar 236 are placed in the notch groove 232a of the bracket 232, and The sub-adhesive roller 230 is moved by sliding the support frame 234 along the notch groove 232a so that the engagement roller 235 comes into contact with the end of the notch groove 232a of the bracket 232. Is positioned at a predetermined position, and then the fixing pin 237 is fitted into the fitting hole 232b of the bracket 232, and the sub-adhesive roller 230 is fixed at the predetermined position, so that the initial state can be simplified. Can be restored.

  For example, in the case where a change in the size of the diameter accompanying the use of the main adhesive roller 210 occurs, the cam shaft 215 is rotated by rotating the rotating shaft 214 and the cam follower 216 is moved. By rotating the eccentric bearing 212, the pressing force of the main adhesive roller 210 against the rubber cylinder 203 can be adjusted.

  Therefore, according to the present embodiment, the following effects can be obtained.

(1) The main adhesive roller 210 is separated from the rubber drum 203 so that it can be cleaned with a cleaning band 222 or the like, and the sub adhesive is replaced with the main adhesive roller 210 during the cleaning of the main adhesive roller 210. Since the rubber cylinder 203 can be regenerated by the roller 230, the dust adhering to the rubber cylinder 203 can be continuously removed without interrupting printing.

(2) The angle θ1 between the plane S1 connecting the axis Op of the impression cylinder 202 and the axis Oa of the main adhesive roller 210 and the horizontal plane S0, the axis Op of the impression cylinder 202, and the rubber cylinder 203 Since the main adhesive roller 210 is brought into contact with the rubber cylinder 203 so that the angle θ2 formed by the plane S2 connecting the axis Ob and the horizontal plane S0 is different, the rotation of the eccentric bearing 205 causes the rotation. Position adjustment of the rubber cylinder 203 corresponding to the thickness of the sheet 1 with respect to the impression cylinder 202 and contact / separation (detachment) with respect to the impression cylinder 202 can be performed.

(3) Since the cam follower 242 is brought into contact with the cam surface of the cam 241, the contact state of the sub-adhesive roller 230 with the outer peripheral surface of the rubber cylinder 203 can be set. Even if the position of the rubber cylinder 203 is changed by the rotation of the rubber cylinder 203, the sub-adhesive roller 230 can always be pressed against the outer peripheral surface of the rubber cylinder 203 with a constant force, and is attached to the rubber cylinder 203. The dust removing ability for transferring and collecting the dust by the sub-adhesive roller 230 can be maintained constantly without being influenced by the position of the rubber cylinder 203.

(4) When cleaning the main adhesive roller 210, the sub adhesive roller 230 is brought into contact with the rubber cylinder 203 to move the main adhesive roller 210 away from the rubber cylinder 203, or the main adhesive roller 210 When the main adhesive roller 210 is again brought into contact with the rubber cylinder 203 after cleaning and the auxiliary adhesive roller 230 is separated from the rubber cylinder 203, the adhesive rollers 210, 230 are in contact with the rubber cylinder 203. Since one of the adhesive rollers 210 and 230 is brought into contact with the rubber drum 203 before the other is separated from each other, in other words, the other is separated from the rubber cylinder 203. , 230 always come into contact with the rubber cylinder 203, so that the dust adhering to the rubber cylinder 203 is always removed. It is possible to continue.

(5) The sub-adhesive roller 230 has a diameter smaller than the diameter of the main adhesive roller 210, and the rubber cylinder 203 is pressed against the rubber cylinder 203 by a pressure causing the main adhesive roller 210 to contact the rubber cylinder 203. The sub-adhesive roller 230 is brought into contact with the rubber cylinder 203 with a large pressure, and the sub-adhesive roller 230 is brought into contact with the rubber cylinder 203 longer than the time during which the main adhesive roller 210 is in contact with the rubber cylinder 203. By making contact in a short time, the main adhesive roller 210 is brought into contact with the rubber cylinder 203 for a long time with a small pressure, and the dust is removed while suppressing deterioration of the rubber cylinder 203 and the main adhesive roller 210 itself. At the same time, the sub-adhesive roller 230 is brought into contact with the rubber cylinder 203 with a large pressure for a short time so that the rubber cylinder 203 and the sub-adhesive roller 230 are brought into contact with each other. The dust that is concentrated on the edge of the sheet 1 and cannot be completely removed by the main adhesive roller 210 is removed while minimizing the deterioration of the body. The dust can be removed continuously without interrupting printing, and productivity can be improved.

  Note that the amount of paper dust generated from the edge of the sheet 1 includes the length and density of the fibers of the sheet 1, the state of the fiber cut surface depending on the state of the blade at the time of cutting, and the sheet thickness. It is greatly affected by the rigidity of the printer itself, the conveyance speed during printing, etc.

  If the sub-adhesive roller 230 has a diameter that is about 1/40 of the diameter of the main adhesive roller 210, the pressure, contact time, and conveyance of the sub-adhesive roller 230 can be used as long as the sheet 1 is a kind of sheet 1 that has less paper dust. By adjusting the speed or the like, dust on the rubber cylinder 203 can be sufficiently removed. However, if the diameter of the sub-adhesive roller 230 is smaller than that, the surface area of the sub-adhesive roller 230 that removes dust from the rubber cylinder 203 becomes too small. It may be difficult to sufficiently remove dust from the rubber cylinder 203.

  For this reason, if the diameter of the sub-adhesive roller 230 is 1/20 or more of the diameter of the main adhesive roller 210, there is no need to take time to adjust the pressing force, contact time, conveyance speed, and the like. It is preferable because it can sufficiently remove the paper dust of a relatively large number of types of sheets 1, and in particular, when it is 1/5 or more, the paper dust of the main types of sheets 1 is sufficiently removed. This is very preferable.

  On the other hand, if the diameter of the sub-adhesive roller 230 is approximately the same as the diameter of the main adhesive roller 210, the sub-adhesive roller 230 can have a surface area that can sufficiently remove dust from the rubber cylinder 203, but a large pressure (press The entire apparatus including the mechanism for making contact with the rubber cylinder 203 by pressure) becomes large, resulting in high costs.

  For this reason, although the restrictions differ depending on the size of paper that can be printed as the entire apparatus, for example, in the case of an apparatus that can handle paper of A size (625 × 880 mm) or larger, the sub-adhesive roller 230 is The diameter is preferably 4/5 or less of the diameter of the main adhesive roller 210.

  Note that printing includes coating, inkjet, and the like, and a printing unit subsequent to the dust removal apparatus includes a coating unit and an inkjet unit.

  Furthermore, the sheet of the present invention is not limited to paper, and may be plastics or the like. Furthermore, the sheet may be changed to a paper or plastic film web, and the printed material includes a functional film or the like. When it is necessary to remove the dust on the front and back sides when changing to a web, a configuration is adopted in which dust removing devices are arranged above and below the web and the web is sandwiched between two rubber cylinders instead of the impression cylinder.

  The dust removing device for a printing press according to the present invention can remove dust adhering to a rubber cylinder continuously without interrupting printing, and can be used extremely beneficially in the printing industry.

1 sheet 10 frame 100 paper feeder 101 paper feeder 102 feeder board 103 swing device 200 dust removing device 201 transfer drum 202 pressure drum 203 rubber drum 204 bearing 205 eccentric bearing 205a arm 206 link plate 207 lever 208 support shaft 209 stepping Motor 209a Rod 210 Main adhesive roller 211 Bearing 212 Eccentric bearing 212a Arm 213 Air cylinder 214 Rotating shaft 215 Cam 216 Cam follower 221 Pad 222 Cleaning zone 223 Feeding roller 224 Winding roller 225 Pad moving means 230 Secondary adhesive roller 231 Rotating shaft 232 Bracket 232a Notch groove 232b Fitting hole 233 Support stay 234 Support frame 235 Engagement roller 235a Support member 236 Engagement bar 23 6a Support member 237 Stop pin 238 Compression coil spring 239 Lever 240 Air cylinder 241 Cam 242 Cam follower 243 Support plate 250 Controller 251 Paper thickness input means 252 Counter 253 Timer 254 Cleaning start timing input means 300 First printing unit 301 Transfer cylinder 302 Pressure Cylinder 303 Rubber cylinder 304 Plate cylinder 400 Second printing unit 401 Transfer cylinder 402 Impression cylinder 403 Rubber cylinder 404 Plate cylinder 500 Third printing unit 501 Transfer cylinder 502 Impression cylinder 503 Rubber cylinder 504 Plate cylinder 600 Fourth printing unit 601 Transfer cylinder 602 Impression cylinder 603 Rubber cylinder 604 Plate cylinder 700 Paper discharge device 701 Paper discharge cylinder 703 Sprocket 704 Paper discharge chain 705 Paper discharge stand

Claims (3)

An impression cylinder that holds and conveys the sheet;
A rubber cylinder supported by an eccentric bearing so as to be able to contact and separate from the impression cylinder;
In a dust removing device for a printing press comprising a first adhesive roller that is in contact with the rubber cylinder and has adhesiveness on an outer peripheral surface thereof,
First adhesive roller moving means for moving the first adhesive roller so as to make the first adhesive roller contact and separate from the rubber cylinder;
First adhesive roller cleaning means for cleaning the outer peripheral surface of the first adhesive roller in contact with the outer peripheral surface of the first adhesive roller separated from the rubber cylinder;
A second adhesive roller that contacts the rubber cylinder and has adhesiveness on the outer peripheral surface;
Second adhesive roller moving means for moving the second adhesive roller so as to make the second adhesive roller contact and separate from the rubber cylinder;
A cam attached to the eccentric bearing supporting the rubber cylinder;
A cam follower that is provided in the second adhesive roller moving means and contacts the cam surface of the cam as the second adhesive roller contacts the rubber cylinder;
As the first adhesive roller moving means is operated so that the first adhesive roller is brought into contact with the rubber cylinder, the second adhesive roller is separated from the rubber cylinder. The first adhesive roller moving means is operated to operate the second adhesive roller moving means so that the first adhesive roller moves away from the rubber cylinder and comes into contact with the first adhesive roller cleaning means. And a control means for actuating the second adhesive roller moving means so as to bring the second adhesive roller into contact with the rubber cylinder, and
An angle θ1 formed by a plane S1 connecting the axis Op of the impression cylinder and the axis Oa of the first adhesive roller and the horizontal plane S0, and the axis Op of the impression cylinder and the axis Ob of the rubber cylinder, The dust removing device for a printing press, wherein the first adhesive roller is disposed so that an angle θ2 formed by the connecting plane S2 and the horizontal plane S0 is different. An impression cylinder,
A rubber cylinder capable of contacting and separating from the impression cylinder;
In a dust removing device for a printing press comprising a first adhesive roller that is in contact with the rubber cylinder and has adhesiveness on an outer peripheral surface thereof,
First adhesive roller moving means for moving the first adhesive roller so as to make the first adhesive roller contact and separate from the rubber cylinder;
First adhesive roller cleaning means for cleaning the outer peripheral surface of the first adhesive roller in contact with the outer peripheral surface of the first adhesive roller separated from the rubber cylinder;
A second adhesive roller that is in contact with the rubber cylinder and has an adhesiveness on the outer peripheral surface and has a diameter smaller than the diameter of the first adhesive roller;
Second adhesive roller moving means for moving the second adhesive roller so as to make the second adhesive roller contact and separate from the rubber cylinder;
As the first adhesive roller moving means is operated so that the first adhesive roller is brought into contact with the rubber cylinder, the second adhesive roller is separated from the rubber cylinder. The first adhesive roller moving means is operated to operate the second adhesive roller moving means so that the first adhesive roller moves away from the rubber cylinder and comes into contact with the first adhesive roller cleaning means. And the second pressure-sensitive adhesive roller is brought into contact with the rubber cylinder at a pressure larger than the pressure of the first pressure-sensitive adhesive roller in contact with the rubber cylinder. The second adhesive roller moving means is arranged so that the second adhesive roller is brought into contact with the rubber drum in a shorter time than the time in which the first adhesive roller is brought into contact with the drum. With control means to operate A dust removing device for a printing press characterized by that. A printing press comprising the dust removal device for a printing press according to claim 1 or 2.

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