JP2013133224A - Deburring device and image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce for a long period of time an impact generated when deburring a recording medium.SOLUTION: A deburring device includes: a rotatable first roll; a rotatable second roll which faces the first roll, and between which and the first roll the recording medium passes; a first support rotatably supporting the first roll at both ends in the axial direction; a second support rotatably supporting the second roll at both ends in the axial direction; a load applying part for applying a load to the first roll through the first support to crush the burrs of the recording medium by holding the recording medium passing between the first roll and the second roll, with the first roll and the second roll therebetween; and an elastic member which is provided between the first support and the second support and receives the load from the load applying part to the first support, thereby forming an interspace narrower than the thickness of the recording medium between the first roll and the second roll.

Description

  The present invention relates to a deburring device and an image forming apparatus.

  In Patent Document 1, the first removal member (1) capable of contacting the first surface (Sa) of the medium (S, S1, S2, S3) and the second surface (Sb) are disposed so as to be contactable. In the removal portion pair (1 + 2) having the second removal member (2), the medium (S, S1, S2, S3) is interposed between the first removal member (1) and the second removal member (2). ) Between the separation position and the approach position, and a pair of removal units (S1a, S2a, S3a) for removing unnecessary portions (S1a, S2a, S3a) of the medium (S, S1, S2, S3) at the separation position. 1 + 2), a biasing member (7) for applying a force for bringing the first removal member (1) and the second removal member (2) closer, and buffers provided at both ends of the removal portion pair (1 + 2) The member (3) cushions an impact when the first removal member (1) and the second removal member (2) move from the separated position to the approach position.衝部 material and (3), unnecessary portion removal apparatus provided with (BTS) is disclosed.

  In Patent Document 2, the length of the circumferential surface in the direction perpendicular to the direction of the circumferential movement is determined by the surface of the recording medium having a harder circumferential surface than the recording medium on which an image is formed. The recording medium intersects in the first direction between the first peripheral body longer than the length in the first direction and the peripheral surface harder than the recording medium, and the peripheral surface of the first peripheral body. By applying a load to at least one of the second peripheral body that passes in the second direction and the first peripheral body and the second peripheral body, a recording medium is provided by the first peripheral body and the second peripheral body. The peripheral surface at a location outside a region that contacts the recording medium when the recording medium passes through at least one peripheral surface of the first peripheral body and the second peripheral body. Surrounding band member that is softer than the peripheral surface and thinner than the recording medium , It discloses a media pinching device provided with.

JP 2010-132403 A JP 2011-121700 A

  An object of the present invention is to reduce the impact generated when deburring a recording medium over a long period of time.

  The first aspect of the present invention is the first roll that rotates, the second roll that is provided facing the first roll, the recording medium passes between the first roll, and the first roll that rotates. The 1st support part which supports a roll rotatably in the axial direction both ends, The 2nd support part which supports the 2nd roll rotatably in the axial direction both ends, The 1st roll and the 2nd roll A load that applies a load to the first roll through the first support portion so that the recording medium passing between the first and second rolls is sandwiched between the first roll and the second roll to crush the burrs of the recording medium. Provided between the applying portion, the first support portion, and the second support portion, and a gap smaller than the thickness of the recording medium is formed between the first roll and the second roll. An elastic member that receives a load from the load applying portion to the first support portion A deburring device comprising a.

  According to a second aspect of the present invention, there is provided a deburring device according to the first aspect, an image forming unit that forms an image on a recording medium deburred by the deburring device, and a recording in which an image is formed by the image forming unit. And a fixing unit that conveys the medium and fixes the image onto the recording medium.

  According to the configuration of the first aspect of the present invention, it occurs when the recording medium is deburred, compared to the case where a gap is formed between the rolls by the tape wound around at least one of the first roll and the second roll. Impact can be reduced over a long period of time.

  According to the configuration of the second aspect of the present invention, image disturbance due to an impact generated when the recording medium is deburred can be suppressed over a long period of time as compared with the case where the deburring device in the present configuration is not provided.

1 is a schematic diagram illustrating a configuration of an image forming apparatus according to an exemplary embodiment. FIG. 2 is a schematic diagram illustrating a configuration of an image forming unit according to the present embodiment. It is a schematic perspective view which shows the structure of the deburring apparatus which concerns on this embodiment. It is a schematic perspective view which shows the structure of the deburring apparatus which concerns on this embodiment. It is a schematic sectional drawing which shows the structure of the deburring apparatus which concerns on this embodiment. It is a schematic side view which shows the structure of the deburring apparatus which concerns on this embodiment. It is explanatory drawing for demonstrating the retracting operation | movement of the upper side deburring roll which concerns on this embodiment. It is a schematic side view which shows the structure of the deburring apparatus which concerns on a modification.

  Below, an example of an embodiment concerning the present invention is described based on a drawing.

(Configuration of image forming apparatus according to the present embodiment)
First, the configuration of the image forming apparatus according to the present embodiment will be described. FIG. 1 is a schematic diagram illustrating a configuration of an image forming apparatus according to the present embodiment.

  The image forming apparatus 10 according to the present embodiment is an apparatus that forms a color image or a black and white image, and constitutes a horizontal one side (left side in FIG. 1) portion of the image forming apparatus 10 as shown in FIG. A first housing 10A and a second housing 10B that is detachably connected to the first housing 10A and forms the other side in the horizontal direction (right side in FIG. 1) of the image forming apparatus 10 are provided.

  An image signal processing unit 13 that performs image processing on image data sent from an external device such as a computer is provided on the second housing 10B.

  On the other hand, the first special color (V), second special color (W), yellow (Y), magenta (M), cyan (C), and black (K) toners are provided on the upper portion of the first housing 10A. Toner cartridges 14V, 14W, 14Y, 14M, 14C, and 14K are provided so as to be replaceable along the horizontal direction.

  The first special color and the second special color are appropriately selected from colors other than yellow, magenta, cyan, and black (including transparency). In the following description, the first special color (V), the second special color (W), yellow (Y), magenta (M), cyan (C), and black (K) are distinguished for each component. Is described by adding any one of V, W, Y, M, C, and K after the reference numeral, and the first special color (V), the second special color (W), yellow (Y), and magenta (M ), Cyan (C), and black (K) are not distinguished, V, W, Y, M, C, and K are omitted.

  Below the toner cartridge 14, a plurality of image forming units 16 that form images are provided along the horizontal direction so as to correspond to the toner cartridges 14. In the present embodiment, the plurality of image forming units 16 is composed of six corresponding to the toners of the respective colors. An exposure unit 40 is provided for each image forming unit 16 between each toner cartridge 14 and each image forming unit 16.

  Each exposure unit 40 receives the image data subjected to the image processing by the image signal processing unit 13 from the image signal processing unit 13, and the exposure light L (see FIG. 2) modulated according to the image data is described later. Each photoconductor 18 (see FIG. 2) is configured to irradiate.

  As shown in FIG. 2, each image forming unit 16 includes a photoreceptor 18 that is driven to rotate in one direction (clockwise direction in FIG. 2). Around each photoconductor 18, there is a corona discharge type (non-contact type) scorotron charger 20 as an example of a charging device for charging the photoconductor 18, and a photoconductor 18 charged by the scorotron charger 20. An example of a developing device 22 that develops the electrostatic latent image formed by irradiating the exposure light L from the exposure unit 40 with a developer, and a removal member that removes the developer remaining on the photoreceptor 18 after transfer. And a static elimination device 26 that eliminates static electricity by irradiating the photoconductor 18 with light.

  Each scorotron charger 20, each developing device 22, each blade 24, and each static eliminating device 26 are opposed to the surface of each photoconductor 18 in this order from the upstream side to the downstream side in the rotation direction of each photoconductor 18. Has been placed.

  Each developing device 22 includes a developer accommodating member 22A that accommodates a developer G containing toner, and a developing roll 22B that supplies the developer G accommodated in the developer accommodating member 22A to the photosensitive member 18. ing. Each developer accommodating member 22A is connected to each toner cartridge 14 (see FIG. 1) through a toner supply path (not shown), and toner is supplied from each toner cartridge 14.

  As shown in FIG. 1, below the image forming unit 16, a transfer unit 32 that transfers the toner image formed by each image forming unit 16 to the recording medium P is provided. The transfer unit 32 is a first transfer member that transfers the toner image formed by the intermediate transfer belt 34 as an example of an annular transfer member and the photoreceptor 18 of each image forming unit 16 to the intermediate transfer belt 34. A transfer roll 36 and a second transfer roll 62 as an example of a transfer member that transfers the toner image on the intermediate transfer belt 34 to the recording medium P are provided.

  As shown in FIG. 2, the first transfer roll 36 is provided at a position facing the photoconductor 18 of each image forming unit 16 with the intermediate transfer belt 34 interposed therebetween. The first transfer roll 36 is applied with a transfer bias voltage having a polarity opposite to the toner polarity by a power supply unit (not shown). With this configuration, the toner image formed on the photoconductor 18 is transferred to the intermediate transfer belt 34 at a predetermined first transfer position T1. Specifically, the first transfer position T1 is a contact position where the intermediate transfer belt 34 and the photoconductor 18 are in contact with each other.

  As shown in FIG. 1, the intermediate transfer belt 34 faces a drive roll 38 driven by a motor (not shown), a tension applying roll 41 that applies tension to the intermediate transfer belt 34, and a second transfer roll 62. It is wound around the arranged opposing roll 42 and a plurality of support rolls 44. When the drive roll 38 rotates, the intermediate transfer belt 34 is configured to circulate and move in one direction (counterclockwise direction in FIG. 1). The toner image transferred to the intermediate transfer belt 34 at the first transfer position T1 (see FIG. 2) is conveyed to the predetermined second transfer position T2 as the intermediate transfer belt 34 circulates and moves. ing.

  The second transfer roll 62 is applied with a transfer bias voltage having a polarity opposite to the toner polarity by a power feeding unit (not shown). By applying the transfer bias voltage, the second transfer roller 62 is configured to transfer the toner image conveyed by the intermediate transfer belt 34 to the second transfer position T2 to the recording medium P at the second transfer position T2.

  As described above, in this embodiment, each image forming unit 16 that forms an image and the transfer unit 32 that transfers the toner image formed by each image forming unit 16 to the recording medium P form an image on the recording medium. Functions as an example of an image forming unit.

  Below the transfer unit 32, two recording medium storage units 48 for storing recording media such as paper are provided along the horizontal direction. Each recording medium accommodating portion 48 can be pulled out from the first housing 10A. Above one end side (the right side in FIG. 1) of each recording medium container 48, a delivery roll 52 that sends the recording medium P from each recording medium container 48 to the transport path 60 is provided.

  In each recording medium accommodating portion 48, a bottom plate 50 on which the recording medium P is placed is provided. The bottom plate 50 is lowered by an instruction of a control unit (not shown) when the recording medium accommodating portion 48 is pulled out from the first housing 10A. When the bottom plate 50 is lowered, a space in which the user replenishes the recording medium P is formed in the recording medium accommodating portion 48.

  When the recording medium accommodating portion 48 pulled out from the first housing 10A is attached to the first housing 10A, the bottom plate 50 is raised by an instruction from the control means. As the bottom plate 50 moves up, the uppermost recording medium P placed on the bottom plate 50 and the delivery roll 52 come into contact with each other.

  On the downstream side in the recording medium conveyance direction of the sending roll 52 (hereinafter sometimes simply referred to as “downstream side”), a separation roll 56 that separates the recording media P sent from the recording medium accommodating portion 48 one by one. Is provided. A plurality of transport rolls 54 that transport the recording medium P downstream in the transport direction are provided on the downstream side of the separation roll 56.

  The conveyance path 60 provided between the recording medium storage unit 48 and the transfer unit 32 is configured to fold the recording medium P sent out from the recording medium storage unit 48 to the left side in FIG. The folding portion 60B extends to the second transfer position T2 between the second transfer roll 62 and the opposing roll 42 so as to be folded to the right in FIG. On the upstream side of the second transfer position T2 in the conveyance direction, a conveyance roll (registration roll) 64 for adjusting the movement timing of the toner image on the intermediate transfer belt 34 and the conveyance timing of the recording medium P is provided.

  A preliminary path 66 extending from the side surface of the first housing 10 </ b> A is provided so as to join the second folding portion 60 </ b> B of the transport path 60. A recording medium P sent out from a recording medium accommodation unit (not shown) arranged adjacent to the first housing 10 </ b> A enters the conveyance path 60 through the spare path 66.

  Further, in the present embodiment, recording is performed when cutting from the base paper on the downstream side of the first return part 60A in the transport path 60 and upstream of the joining part of the spare path 66 with respect to the second return part 60B. A deburring device 200 is provided that deburrs the recording medium P by crushing burrs formed at the end of the medium P. A specific configuration of the deburring device 200 will be described later.

  On the downstream side of the second transfer position T2, a plurality of conveying belts 70 that convey the recording medium P on which the toner image has been transferred toward the second casing 10B are provided in the first casing 10A. A transport belt 80 that transports the transported recording medium P to the downstream side is provided in the second casing 10B.

  Each of the plurality of conveyance belts 70 and the conveyance belt 80 is formed in an annular shape and is wound around a pair of winding rolls 72. The pair of winding rolls 72 are respectively arranged on the upstream side and the downstream side in the conveyance direction of the recording medium P, and when one of them is driven to rotate, the conveyance belt 70 (conveyance belt 80) moves in one direction (in FIG. 1). Cycle in the clockwise direction.

  On the downstream side of the conveyance belt 80, a fixing device 82 as an example of a fixing unit that conveys the recording medium P on which the toner image is transferred and fixes the toner image on the recording medium P is provided. The fixing device 82 includes a fixing belt 84 and a pressure roll 88 disposed so as to come into contact with the fixing belt 84 from below. A fixing unit is formed between the fixing belt 84 and the pressure roll 88 to press and heat the recording medium P to fix the toner image.

  The fixing belt 84 is formed in an annular shape and is wound around the drive roll 89 and the driven roll 90. The drive roll 89 faces the pressure roll 88 from above, and the driven roll 90 is disposed above the drive roll 89. Each of the driving roll 89 and the driven roll 90 includes a heating unit such as a halogen heater. As a result, the fixing belt 84 is heated.

  On the downstream side of the fixing device 82, a conveyance belt 108 for conveying the recording medium P sent out from the fixing device 82 to the downstream side is provided. The conveyor belt 108 is configured in the same manner as the conveyor belt 70.

  A cooling device 100 that conveys the recording medium P heated by the fixing device 82 and cools the recording medium P is provided on the downstream side of the conveying belt 108. On the downstream side of the cooling device 100, there is provided a correction device 170 that conveys the recording medium P and corrects the curl of the recording medium P.

  A detection device 180 that detects a toner density defect, an image defect, an image position defect, and the like of the toner image fixed on the recording medium P is provided on the downstream side of the correction device 170. The detection device 180 detects the reflected light emitted from the light source to the recording medium P and reflected upward by the recording medium P by a detection element such as a CCD (Charge Coupled Device) image sensor, thereby causing a toner density defect and an image defect. Image position defects and the like are detected.

  On the downstream side of the detection device 180, a discharge roll 198 that discharges the recording medium P on which an image is formed on one side to a discharge unit 196 attached to the side surface of the second housing 10B is provided.

  On the other hand, when images are formed on both sides, the recording medium P sent out from the detection device 180 is conveyed to a reverse path 160 provided on the downstream side of the detection device 180. The reversing path 160 includes a branch path 160A that branches from the transport path 60, a transport path 160B that transports the recording medium P transported along the branch path 160A toward the first housing 10A, and a transport path 160B. A reversing path 160C is provided for turning the recording medium P conveyed along the reverse direction in a reverse direction so that the recording medium P is switched back and reversed to reverse the front and back.

  With this configuration, the recording medium P that is switched back and conveyed by the reversing path 160C is conveyed toward the first housing 10A, and further enters the conveyance path 60 provided above the recording medium accommodating portion 48, so that the second It is sent again to the transfer position T2.

(Image Forming Process of Image Forming Apparatus 10)
Next, an image forming process of the image forming apparatus 10 will be described.

  The image data that has been subjected to image processing by the image signal processing unit 13 is sent to each exposure unit 40. In each exposure unit 40, each exposure light L is emitted according to the image data and exposed to each photoconductor 18 charged by the scorotron charger 20, and an electrostatic latent image is formed. The electrostatic latent image formed on the photoreceptor 18 is developed by the developing device 22 and is first special color (V), second special color (W), yellow (Y), magenta (M), cyan (C). A toner image of each color of black (K) is formed.

  The toner images of the respective colors formed on the photoreceptors 28 of the image forming units 16V, 16W, 16Y, 16M, 16C, and 16K are intermediate transfer belts by six first transfer rolls 36V, 36W, 36Y, 36M, 36C, and 36K. 34 is sequentially transferred in multiple copies. The toner images of the respective colors that have been multiplex-transferred onto the intermediate transfer belt 34 are secondarily transferred by the second transfer roll 62 onto the recording medium P that has been transported from the recording medium container 48.

  The recording medium P onto which the toner image has been transferred is conveyed toward the fixing device 82 provided inside the second housing 10B by the conveyance belt 70. The toner images of the respective colors on the recording medium P are fixed on the recording medium P by being heated and pressurized by the fixing device 82.

  Further, the recording medium P on which the toner image is fixed is cooled by passing through the cooling device 100 and then sent to the correction device 170 to correct the curvature generated in the recording medium P. The recording medium P whose curvature is corrected is discharged to the discharge unit 196 by the discharge roll 198 after an image defect or the like is detected by the detection device 180.

  On the other hand, when an image is formed on a non-image surface on which no image is formed (in the case of double-sided printing), after passing through the detection device 180, the recording medium P is reversed by the reversing path 160 and above the recording medium container 48. And a toner image is formed on the back surface according to the above-described procedure.

(Specific configuration of the deburring device 200)
Next, a specific configuration of the deburring device 200 will be described. 3 to 7 are schematic views showing the configuration of the deburring device 200. FIG. Note that an arrow X direction in the figure indicates a conveyance direction (or a passing direction) in which the recording medium P is conveyed in the deburring device 200, and an arrow Y direction in the figure intersects the conveyance direction. The arrow Z direction in the figure indicates the conveyance direction and the upper direction intersecting with the width direction.

  As shown in FIG. 3, the deburring device 200 includes an upper deburring roll 202 as an example of a rotating first roll, and an example of a second roll that is provided opposite to the upper deburring roll 202 and rotates. And a lower deburring roll 204. Further, as shown in FIG. 4, the deburring device 200 includes a pair of support arms 206 as an example of a first support unit that rotatably supports the upper deburring roll 202 at both axial ends thereof, and a lower side. A pair of side plates 208 as an example of a second support part that rotatably supports the deburring roll 204 at both axial ends thereof, and a load applying part that applies a load to the upper deburring roll 202 via the support arm 206. And a pair of spring members 222 as an example.

  The upper deburring roll 202 and the lower deburring roll 204 are made of a metal material (for example, stainless steel) that is harder than the recording medium P. As shown in FIG. 3, the upper deburring roll 202 and the lower deburring roll 204 are provided opposite to each other at a position where the recording medium P is sandwiched from above and below, and the upper deburring roll 202 and the lower deburring roll 204 are provided. The recording medium P passes between the rolls 204.

  Of the upper deburring roll 202 and the lower deburring roll 204, the lower deburring roll 204 disposed on the lower side is a drive roll, and is driven by a drive motor (not shown) in one direction (reverse to FIG. 3). (Clockwise). The upper deburring roll 202 disposed on the upper side is a driven roll, and comes into contact with the recording medium P conveyed by the lower deburring roll 204, thereby reversing the rotational direction of the lower deburring roll 204 (see FIG. 3 (clockwise in FIG. 3).

  4 and 5, the upper deburring roll 202 is manually rotated by the operator to remove the recording medium P when the recording medium P is clogged. An operation unit 207 is provided.

  A plurality of connecting members 210 connected to the pair of side plates 208 are provided between the pair of side plates 208. A frame 212 that includes the plurality of connecting members 210 and the pair of side plates 208 and supports each component of the deburring device 200 is configured. For example, the frame 212 is attached to and detached from the housing 10A (frame) of the image forming apparatus 10 by being pulled out from the housing 10A (see FIG. 1) of the image forming apparatus 10 in the Y direction. Yes.

  Further, as shown in FIG. 3, a pair of transport rollers 214 </ b> A and 214 </ b> B that transport the recording medium P with the pair of side plates 208 being rotatably supported. The pair of transport rolls 214A and 214B is disposed on the upstream side in the transport direction with respect to the upper deburring roll 202 and the lower deburring roll 204, and is interposed between the upper deburring roll 202 and the lower deburring roll 204 (a sandwiching portion). ) To the recording medium P.

  Of the pair of transport rolls 214A and 214B, the transport roll 214B disposed on the lower side is a drive roll, and the transport roll 214A disposed on the upper side is a driven roll. The transport roll 214B disposed on the lower side is driven by the drive motor (not shown) through a gear (not shown) coupled to the lower deburring roll 204.

  Furthermore, the pair of side plates 208 guides the recording medium P supplied to the deburring device 200 to a position between the pair of transport rolls 214A and 214B (clamping portion) and transports the recording medium P by the pair of transport rolls 214A and 214B. A first guide part 218 is provided for guiding the recording medium P to be moved between the upper deburring roll 202 and the lower deburring roll 204 (a clamping part). The pair of side plates 208 is provided with a second guide portion 220 for guiding the recording medium P that has passed between the upper deburring roll 202 and the lower deburring roll 204 to the downstream side in the transport direction.

  As shown in FIG. 4, each spring member 222 and each support arm 206 are arranged on the outer surface 208 </ b> A side of the pair of side plates 208 (on the side opposite to the surface on which one side plate 208 faces the other side plate 208). Has been placed. Each spring member 222 is composed of a compression spring, and is attached to a bolt 226 fixed to each side plate 208 via a fixing member 224.

  On the other hand, each support arm 206 is formed in a substantially L shape, and one end portion (X direction side end portion) thereof is rotatably supported on each side plate 208 by each rotation shaft 206A. A pin 228 having an insertion hole 228A (see FIG. 6) into which a bolt 226 is inserted with a gap is provided at the other end portion (lower end portion) of each support arm 206. The pin 228 sandwiches the spring member 222 attached to the bolt 226 with the head 226A of the bolt 226, and the spring member 222 presses the pin 228 downward. As a result, the lower side of the upper deburring roll 202 supported by the support arm 206 is crushed by the upper deburring roll 202 and the lower deburring roll 204 with the recording medium P sandwiched therebetween. A downward load is applied to the deburring roll 204 side.

  In the support arm 206, the distance between the pin 228 pushed by the spring member 222 and the rotating shaft 206A is longer than the distance between the bearing 206B supporting the upper deburring roll 202 and the rotating shaft 206A. The load by which the spring member 222 pushes the pin 228 is amplified and applied to the upper deburring roll 202. The load by the spring member 222 is adjusted by tightening the bolt 226.

  Furthermore, in the present embodiment, cams 230 for moving the support arms 206 up and down are provided on the outer surface 208A side of the pair of side plates 208, respectively. On the other hand, a cam follower 238 that comes into contact with the cam 230 is provided at the end (lower end) of the support arm 206 below the pin 228.

  The cam 230 is composed of an eccentric cam. As shown in FIG. 6, a groove portion 240 into which a part of the outer periphery of the cam follower 238 is fitted is formed in the long diameter portion of each cam 230.

  The pair of cams 230 are connected to both axial ends of the cam shaft 232 rotatably supported by the pair of side plates 208, and rotate integrally with the cam shaft 232. One of the pair of side plates 208 is provided with a cam motor 234 that rotationally drives the cam 230, as shown in FIG. The cam motor 234 rotationally drives a gear 236 fixed to the cam shaft 232, so that the pair of cams 230 are rotationally driven.

  When the cam motor 234 rotates the pair of cams 230 and the short diameter portion of the cam 230 comes into contact with the cam follower 238, the upper deburring roll 202 and the lower deburring roll 204 come close to each other (see FIG. 6). ) When the long diameter portion of the cam 230 comes into contact with the cam follower 238, the upper deburring roll 202 and the lower deburring roll 204 shift from a proximity state to a separated state (see FIG. 7). . In the proximity of the upper deburring roll 202 and the lower deburring roll 204, the recording medium P is deburred. For example, when the double-sided printing is performed on the recording medium P, the recording medium P having an image formed on one side is conveyed to the deburring device 200 when the upper deburring roll 202 and the lower deburring roll 204 are separated. To be done. The upper deburring roll 202 and the lower deburring roll 204 are shifted to a separated state when a thin recording medium P (thin paper) not to be deburred is conveyed to the deburring apparatus 200.

  Here, in this embodiment, the spring member 222 to the support arm 206 is formed so that a gap S smaller than the thickness of the recording medium P is formed between the upper deburring roll 202 and the lower deburring roll 204. An elastic member 242 that receives a load is provided on the short diameter portion of each cam 230. Therefore, when the upper deburring roll 202 and the lower deburring roll 204 are in the proximity of each other, the elastic member 242 contacts the cam follower 238 and is predetermined between the upper deburring roll 202 and the lower deburring roll 204. The formed gap S is formed.

  Note that the “recording medium” in the “gap S smaller than the thickness of the recording medium P” does not include the thin recording medium P that is not subject to deburring, and the gap S is larger than the thin recording medium P. It may be large. The thickness of the recording medium P to be deburred is, for example, 50 μm or more and 500 μm or less, and the gap S is, for example, a length in the range of more than 50 μm and less than 500 μm.

  When the recording medium P passes between the upper deburring roll 202 and the lower deburring roll 204 and the cam follower 238 is lifted upward via the support arm 206, the elastic follower 242 moves the cam follower 238 to the cam 230. Even when it hits, it is elastically deformed to absorb the impact. As the elastic member 242, a material capable of absorbing the impact, for example, a rubber material or a resin material is used.

(Operation of the deburring device 200)
Next, the operation of the deburring device 200 will be described.

  As shown in FIG. 3, the recording medium P supplied to the deburring device 200 is guided to the pair of transport rolls 214A and 214B by the first guide unit 218, and the upper deburring is performed by the pair of transport rolls 214A and 214B. It is conveyed toward the gap between the roll 202 and the lower deburring roll 204 (the clamping part).

  The recording medium P is conveyed to the second guide unit 220 while the recording medium P is sandwiched between the upper deburring roll 202 and the lower deburring roll 204 and the burrs are crushed. The recording medium P in which the burrs are crushed is guided by the second guide unit 220 and discharged out of the deburring device 200.

  Here, when the recording medium P passes between the upper deburring roll 202 and the lower deburring roll 204, the upper deburring roll 202 is lifted and the gap S between the lower deburring roll 204 is enlarged. The cam follower 238 is lifted upward via the support arm 206, and the cam 230 and the cam follower 238 are separated from each other.

  When the recording medium P finishes passing between the upper deburring roll 202 and the lower deburring roll 204, the cam follower 238 hits the cam 230, but the elastic member 242 provided on the cam 230 is elastically deformed. Absorb the shock. At this time, the upper deburring roll 202 does not collide with the lower deburring roll 204 due to the gap S between the upper deburring roll 204 and the upper deburring roll 202 and the lower deburring roll 204 abut against each other. No impact sound is generated.

  Further, in the present embodiment, unlike the conventional configuration in which a gap is formed between the rolls with the tape wound around the outer periphery of the upper deburring roll 202 or the lower deburring roll 204, the support arm 206 that supports the upper deburring roll 202. And the side plate 208 that supports the lower deburring roll 204, the load of the support arm 206 is received by the elastic member 242 to form a gap S between the rolls. For this reason, in the conventional configuration, the tape is easily rubbed and deteriorated by the rotation of the roll, whereas the elastic member 242 of the present embodiment is not rubbed by the rotation of the roll, and the impact and the impact sound are reduced over a long period of time. Is done.

  Furthermore, in this embodiment, the elastic member 242 is provided on the cam 230 for moving the support arm 206 up and down. Therefore, a receiving member for receiving the load of the support arm 206 is provided separately from the cam 230 and the receiving member. Compared to the configuration in which the elastic member 242 is provided, the number of parts is reduced.

(Modification)
In the above-described configuration, the spring member 222 applied a load to the lower deburring roll 204 with respect to the upper deburring roll 202. However, in addition to the configuration, Alternatively, a configuration in which a load to the upper deburring roll 202 is applied to the lower deburring roll 204 may be employed.

  In the above-described configuration, the elastic member 242 is provided on the cam 230. However, in addition to or instead of this, the cam follower 238 may be provided with the elastic member 242.

  Further, in the configuration described above, the elastic member 242 is provided on the cam 230. However, as shown in FIG. 8, a receiving member 260 for receiving the load of the support arm 206 is provided separately from the cam 230, and the receiving member is provided. An elastic member 242 may be provided between 260 and the support arm 206.

  In the above-described configuration, the cam 230 and the cam follower 238 are separated from each other when the recording medium P passes between the upper deburring roll 202 and the lower deburring roll 204. The elastic member 242 may have a large deformation margin so that the cam follower 238 is not separated from the cam follower 238. Specifically, the amount of movement of the cam follower 238 when the recording medium P passes between the upper deburring roll 202 and the lower deburring roll 204, that is, the difference between the thickness of the recording medium P and the length of the gap S. The elastic member 242 having the above deformation margin is used.

  In the configuration shown in FIG. 8, a moving member 262 that moves integrally with the support arm 206 is provided. The moving member 262 and the receiving member 260 have planar contact surfaces that face each other, and are brought into surface contact with this contact surface. An elastic member 242 is provided on at least one of the contact surface of the moving member 262 and the contact surface of the receiving member 260.

  According to the configuration shown in FIG. 8, the elastic member 242 receives a load from the spring member 222 to the support arm 206 by surface contact, so that the impact is effectively absorbed. In the configuration shown in FIG. 8, as in the above configuration, the upper deburring roll 202 and the lower deburring roll 204 are separated from the adjacent state when the long diameter portion of the cam 230 contacts the cam follower 238. Transition to the state. In the proximity state of the upper deburring roll 202 and the lower deburring roll 204, unlike the above-described configuration, the short diameter portion of the cam 230 is not in contact with the cam follower 238.

  The present invention is not limited to the above-described embodiment, and various modifications, changes, and improvements can be made. For example, the modification examples described above may be appropriately combined.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 16 Image forming unit (an example of an image forming part)
32 Transfer section (an example of an image forming section)
82 Fixing device (an example of a fixing unit)
200 Deburring device 202 Upper deburring roll (an example of a first roll)
204 Lower deburring roll (example of second roll)
206 Support arm (an example of a first support part)
208 side plate (example of second support part)
222 Spring member (an example of a load application part)
242 Elastic member

Claims (2)

A rotating first roll;
A second roll provided opposite to the first roll, the recording medium passing between the first roll and rotating;
A first support portion that rotatably supports the first roll at both axial end portions thereof;
A second support portion for rotatably supporting the second roll at both axial ends thereof;
The recording medium passing between the first roll and the second roll is sandwiched between the first roll and the second roll, and the burr of the recording medium is crushed through the first support portion. A load applying unit for applying a load to the first roll;
The load application is provided between the first support portion and the second support portion so that a gap smaller than the thickness of the recording medium is formed between the first roll and the second roll. An elastic member that receives a load from a part to the first support part;
A deburring device comprising: A deburring device according to claim 1;
An image forming unit that forms an image on the recording medium deburred by the deburring device;
A fixing unit that conveys the recording medium on which the image is formed by the image forming unit and fixes the image to the recording medium;
An image forming apparatus comprising: