JP2018043869A - Recording medium pressing member, post-processing device and image formation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording medium pressing member which can stably press a recording medium while reducing the striking sound that is generated at the time of pressing the recording medium in comparison to a case of pressing the recording medium with a rigid body, and provide a post-processing device and image formation apparatus.SOLUTION: A recording medium pressing member 116 includes: a body part 120; and a pressing part 122 which is provided in the body part 120, has lower rigidity than that of the body part 120 and presses a recording medium. The body part 120 includes a contact surface 150 with which the pressing part 122 is brought into contact when the pressing part 122 is bent to a predetermined range.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a recording medium pressing member, a post-processing apparatus, and an image forming apparatus.

  Japanese Patent Application Laid-Open No. 2004-228867 is a device configuration in which a discharge port, a processing tray, and a stack tray are arranged in this order in the sheet unloading direction, and the sheet bundle is smoothly moved without being displaced when the sheet bundle is unloaded from the processing tray to the stack tray. When a sheet bundle is unloaded from the processing tray to the stack tray, the height difference between the uppermost sheet of the stack tray and the paper loading surface of the processing tray is processed from the discharge port. Disclosed is a sheet processing apparatus in which an elevation shift unit is controlled to be larger than a height difference when a sheet is carried into a tray and / or a height difference when a sheet is directly carried out from a sheet discharge port to a stack tray.

  Japanese Patent Application Laid-Open No. 2004-151867 discloses a paper sheet stacked and accommodated on a paper discharge tray in order to prevent problems such as paper jamming and poor storage that may occur due to the binding portion of the paper stacked and accommodated on the paper discharge tray. Whether to provide a second sensor capable of detecting that the head generated by the rising portion of the binding of P becomes greater than a predetermined amount, and prohibiting further stacking on the discharge tray when the detection information is obtained Or the post-processing apparatus which provided the monitoring means which alert | reports that the further loading accommodation is impossible is disclosed.

  In Patent Document 3, in order to make it possible to accurately arrange a large number of sheets with a simple configuration and low cost, the discharge tray member is supported so that at least the sheet placing member side is movable in the vertical direction, and post-processing is performed. A bottom plate portion on which the stacked sheets are stacked, an urging means for urging the bottom plate portion upward, and an urging force upwardly by pressing the upper surface of the sheet loaded on the bottom plate portion A sheet post-processing apparatus configured to include a regulating unit that regulates the position to a certain position is disclosed.

JP 2012-184114 A JP 2001-322762 A JP-A-10-120276

  The present invention relates to a recording medium pressing member, a post-processing apparatus, and an image that can stably press a recording medium while reducing a hitting sound generated when pressing the recording medium as compared with a case where the recording medium is pressed by a rigid body. An object is to provide a forming apparatus.

  The present invention according to claim 1 includes: a main body portion; and a pressing portion that is provided on the main body portion, has a lower hardness than the main body portion, and presses the recording medium, and the main body portion includes the main body portion. Is a recording medium pressing member having a contact surface against which the pressing portion abuts when the pressing portion is bent to a predetermined range.

  The present invention according to claim 2 is the recording medium pressing member according to claim 1, wherein the pressing portion is fitted into the main body portion.

  The present invention according to claim 3 is the recording medium pressing member according to claim 1 or 2, wherein the pressing portion has a hardness Hs of 15 to 72.

  The present invention according to claim 4 is the recording medium pressing member according to claim 1 or 2, wherein the pressing portion has a hardness Hs of 25 to 35.

  According to a fifth aspect of the present invention, the pressing portion has a contact surface that gradually contacts the recording medium when the pressing portion is bent, and the pressing portion is brought into contact with the recording medium before the pressing portion is bent. The recording medium pressing member according to any one of claims 1 to 4, wherein an angle formed between the tangent line in the longitudinal direction of the contact surface and the recording medium when contacted is less than 90 degrees.

  According to a sixth aspect of the present invention, there is provided a discharge unit that discharges the recording medium, a movement control unit that controls the discharge unit to move in the direction of gravity, and a recording medium presser that presses the recording medium discharged to the discharge unit. The recording medium pressing member includes a main body portion, and a pressing portion that is provided on the main body portion and has a lower hardness than the main body portion and presses the recording medium on the discharge portion. The main body portion is a post-processing device having a contact surface against which the pressing portion hits when the pressing portion is bent to a predetermined range.

  The present invention according to claim 7 comprises: an image device main body that forms an image on a recording medium; and a post-processing device that performs post-processing on the recording medium on which an image is formed by the image forming main body. The post-processing device includes a discharge unit that discharges the recording medium, a movement control unit that controls the discharge unit to move in the direction of gravity, and a recording medium pressing member that presses the recording medium discharged to the discharge unit. The recording medium pressing member includes a main body portion, and a pressing portion that is provided on the main body portion and has a lower hardness than the main body portion and presses the recording medium on the discharge portion. Is an image forming apparatus having a contact surface against which the pressing portion hits when the pressing portion is bent to a predetermined range.

  According to the first aspect of the present invention, the recording medium can be stably pressed while reducing the hitting sound generated when pressing the recording medium as compared with the case where the recording medium is pressed by a rigid body. A pressing member can be provided.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, it is possible to prevent the pressing portion from being detached from the main body portion when the pressing portion is bent.

  According to the third aspect of the present invention, it is possible to give the pressing portion appropriate flexibility as compared with the case where the hardness is other than 15 to 72.

  According to the fourth aspect of the present invention, in addition to the effect of the present invention according to the first or second aspect, the pressing portion is given more appropriate elasticity than the case where the hardness is other than 25-35. be able to.

  According to the present invention of claim 5, in addition to the effects of the present invention of any one of claims 1 to 4, a pressing force can be gradually applied to the recording medium.

  According to the sixth aspect of the present invention, the post-processing device can stably press the recording medium while reducing the hitting sound generated when pressing the recording medium as compared with the case where the recording medium is pressed by a rigid body. Can be provided.

  According to the seventh aspect of the present invention, an image forming apparatus capable of stably pressing a recording medium while reducing a hitting sound generated when pressing the recording medium as compared with a case where the recording medium is pressed by a rigid body. Can be provided.

1 is a side sectional view showing an image forming apparatus according to an embodiment of the present invention. It is sectional drawing which shows the principal part of the post-processing apparatus which concerns on embodiment of this invention, and includes a clamp roll. It is sectional drawing which shows the principal part of the post-processing apparatus which concerns on embodiment of this invention, and contains a sub paddle. FIG. 4 is a cross-sectional view illustrating an operation example of the post-processing apparatus according to the embodiment of the present invention. (C) shows a state immediately before the recording medium is discharged from the stacking unit. It is a side view which shows the main-body part used for embodiment of this invention. It is a side view which shows the press part used for embodiment of this invention. FIG. 4 is a side view showing a recording medium pressing member according to the embodiment of the present invention. It is a side view for demonstrating the effect | action of the recording medium pressing member which concerns on embodiment of this invention, (a) shows the state which the press part before a press part bends contacted the recording medium, (b) is A state in which the pressing portion is bent and hits the contact surface of the main body portion is shown.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the drawings, the front-rear direction is the X-axis direction, the left-right direction is the Y-axis direction, the up-down direction is the Z-axis direction, and the directions indicated by the arrows X, -X, Y, -Y, Z, -Z or the sides indicated are respectively shown. , Front, rear, right, left, upper, lower, or front, rear, right, left, upper, lower. In addition, “•” in “○” means an arrow heading from the back of the paper to the front, and “x” in “○” means from the front to the back of the paper. Means an arrow heading to

  The image forming apparatus 10 includes an image reading device 12, a paper feeding device 14, a user interface 16, an image forming device main body 18, and a post-processing device 20.

  The image reading device 12 is disposed above the paper feeding device 14. An image forming apparatus main body 18 is disposed on the right side of the sheet feeding device 14. The user interface 16 is supported on the upper part of the paper feeding device 14, for example. A post-processing device 20 is arranged on the right side of the image forming apparatus main body 18.

  The image reading device 12 includes a document supply unit 22 that supplies a document and a document reading unit 24 that reads a document supplied from the document supply unit 22, and sends the read document image data to the image forming apparatus main body 18. It is like that.

  In the paper feeding device 14, the recording medium accommodating portions 26 that accommodate a large number of recording media are arranged in the vertical direction, for example, in four stages. Each recording medium accommodation section 26 is provided with a delivery roll 28 for delivering the uppermost recording medium accommodated therein and a conveyance roll 30 for conveying the delivered recording medium. Any one of the recording medium accommodating units 26 is selected, and the recording medium of the selected recording medium accommodating unit 26 is conveyed to the first conveying path 32. A plurality of transport rolls 34 are provided in the first transport path 32. The first conveyance path 32 is connected to a second conveyance path 34 of the image forming apparatus main body 18 described later.

  The user interface 16 includes a display panel 36 and an operation unit 38 on which buttons such as a copy start key, a numeric keypad, and a copy number input key are arranged.

  In the image forming apparatus main body 18, a developer supply device 40 is disposed at the top. Below the developer supply device 40, four laser writing devices 42 for each color of YMCK are provided. Further, a photosensitive member 44 as an image holding member is disposed below each laser writing device 42. Around the photosensitive member 44, a charger 46, a developing device 48, a primary transfer roll 50, and a cleaning device 52 are arranged. A latent image is formed on the photosensitive member 44 charged by the charger 46 by the laser from the laser writing device 42, the latent image is developed by the developing device 48, and the developed toner image is transferred by the primary transfer roll 50. It is transferred to an intermediate transfer belt 54 described later. The toner remaining on the photosensitive member 44 is scraped off by the cleaner 52.

  The intermediate transfer belt 54 is supported by a primary transfer roll 50, a backup roll 56, and a plurality of support rolls 58. The primary transfer roll 50 faces the photoconductor 44 with the intermediate transfer belt 54 interposed therebetween. The backup roll 56 faces the secondary transfer roll 60 with the intermediate transfer belt 54 interposed therebetween. The toner image transferred to the intermediate transfer belt 54 by the primary transfer roll 50 is transferred to the recording medium conveyed through the second conveyance path 34 by the secondary transfer roll 60.

  The second transport path 34 supplies a recording medium between the backup roll 56 and the secondary transfer roll 60 by a plurality of transport rolls 61, and a post-processing device by a plurality of transport rolls 64 via a fixing device 62 described later. 20 is a conveyance path for conveying the recording medium to the medium 20. A conveyance belt 66 is provided between the secondary transfer roll 60 and the fixing device 62.

  The fixing device 62 has a heating roll 68 and a pressure roll 70, and fixes the toner image transferred to the recording medium to the recording medium by heat and pressure.

  The post-processing device 20 is formed such that the third transport path 72 extends to the right side. The third transport path 72 is connected to the second transport path 34 of the image forming apparatus main body 18. The third conveyance path 72 is branched into a fourth conveyance path 74 that extends upward on the wake side and a fifth conveyance path 76 that further extends to the right side. A switching member 78 is provided at a branch portion between the fourth transport path 74 and the fifth transport path 76.

  A first discharge roll 80 is provided at the rear end of the fourth transport path 74. A first discharge portion 82 is disposed on the right side of the first discharge roll 80. A second discharge roll 84 is provided at the right end of the fifth transport path 74. An end binding device 86 is disposed below the second discharge roll 84. Further, a second discharge unit 88 is provided at the right end of the post-processing device 20. The second discharge unit 88 is connected to an elevating device (movement control unit) 90 so as to be movable in the vertical direction.

  The post-processing device 20 will be described in more detail with reference to FIGS. 2 and 3.

  2 and 3, a discharge sensor 92 is disposed in the fifth transport path 74 on the upstream side of the second discharge roll 84. The edge binding device 86 has a stacking portion 94 for processing. The stacking portion 94 is gently inclined with respect to the horizontal so that the right side is upward. The loading unit 94 is provided with a tamper 96 in the front-rear direction. The tamper 96 moves in the front-rear direction to align the width direction of the recording medium.

  A rear wall 98 is provided at the lower left of the stacking portion 94 to align the ends of the recording medium in the conveyance direction. A main battle 100 is rotatably supported above the rear wall 98. With the main battle 100, the recording medium is drawn so that the rear end of the recording medium that has entered the stacking portion 94 is abutted against the rear wall 98.

  A guide 102 is supported on the lower left side of the rear wall 98. The guide 102 extends in the front-rear direction along the rear wall 100. The stapler 105 is guided by the guide 102 and can be moved in the front-rear direction.

  A discharge shaft 104 extending in the front-rear direction is rotatably provided on the upper right side of the stacking portion 94. A third discharge roll 106 is supported on the discharge shaft 104. The third discharge roll 106 can be rotated forward and backward by a drive source (not shown). A stack sensor 108 that detects the recording medium of the stack unit 94 is disposed upstream of the third discharge roll 106 in the discharge direction.

  In FIG. 2, a clamp roll 110 is disposed above the third discharge roll 106. The clamp roll 110 is rotatably supported by the arm part 112, and by rotating the arm part 112, as shown by the solid line in FIG. 2, the raised position away from the third discharge roll 106, and FIG. As indicated by the dotted line, the third discharge roll 106 is movable to a lowered position where the recording medium is in contact with the recording medium.

  In FIG. 3, a sub-paddle 114 is provided above the stacking unit 94 at a position displaced in the front-rear direction from the clamp roll 110. The sub-paddle 114 can be moved up and down between a raised position indicated by a solid line in FIG. 3 that is separated from the stacking portion 94 and a lowered position indicated by a dotted line in FIG. 3 that contacts the recording medium loaded on the loading portion 94. It is configured.

The recording medium pressing member 116 is provided below the third discharge roll 106. For example, three recording medium pressing members 116 are provided on the rotating shaft 118 at intervals in the front-rear direction. As shown in FIGS. 2 and 3, the recording medium pressing member 116 is moved to a position retracted from the cover of the post-processing device 20 and a position to press the recording medium discharged to the second discharge portion 88.
Details of the recording medium pressing member 116 will be described later.

  Next, an operation example of the post-processing device 20 will be described.

  2 and 3, the recording medium that has entered the third conveyance path 72 from the image forming apparatus main body 18 is in a position where the switching member 78 closes the fourth conveyance path 74 and opens the fifth conveyance path 76. In such a case, it is guided to the fifth transport path 76. The recording medium guided to the fifth conveyance path 76 is carried into the stacking portion 94 of the end closing device 86 by the second discharge roll 84. At this time, when the first recording medium to be bundled passes through the discharge sensor 92, the third discharge roll 106 rotates reversely after a preset time has elapsed. Further, the clamp roll 110 is lowered. Therefore, the first recording medium carried into the stacking unit 94 is sandwiched between the third discharge roll 106 and the clamp roll 110 and drawn into the main paddle 100 side. Thereafter, the third discharge roll 106 is stopped, and the clamp roll 110 is lifted and retracted. The main paddle 100 abuts the recording medium against the rear wall 98 and aligns the rear ends in the conveyance direction of the recording medium. When the rear ends of the recording media are aligned, the tamper 96 is actuated to align the ends in the width direction of the recording media.

  When the second and subsequent recording media to be bundled are carried into the stacking section 94, the sub-paddle 114 descends after a predetermined time has passed since the recording media passed through the discharge sensor 92. When the sub paddle 114 is lowered, the sub paddle 114 draws the recording medium to the main paddle 100 side above the loaded recording medium. Therefore, the second and subsequent recording media are also abutted against the rear wall 98 by the main paddle 100, and the rear ends in the recording medium conveyance direction are aligned. When the rear ends in the conveyance direction of the recording medium are aligned, the tamper 94 is actuated to align the ends in the width direction of the recording medium.

  Here, there are an alignment mode in which the stapler 105 is not operated and a staple mode in which the stapler 105 is operated. In the alignment mode, as described above, when the recording mediums are aligned and the alignment is completed as a bundle, the tamper 96 is activated to shift the recording medium bundle from the stacked recording medium bundle in the width direction. On the other hand, in the staple mode, the stapler 105 is operated to staple the end of the bundle of recording media, and then the bundle of recording media is shifted in the width direction.

  As shown in FIG. 4A, in any case, when the bundle of recording media is discharged from the stacking portion 94, the clamp roll 110 is lowered and the third discharge roll 106 and the clamp roll 110 bundle the recording medium. Between. When the bundle of recording media is sandwiched, the third discharge roll 106 rotates forward, and the bundle of recording media starts to be discharged toward the second discharge portion 88. At this time, the recording medium pressing member 116 is in the raised position.

  Next, as shown in FIG. 4B, when the rear end of the bundle of recording media passes the stack sensor 108, or when the third discharge roll 106 is rotated for a preset time, the recording medium pressing member. 116 descends and presses the bundle of recording media discharged to the second discharge portion 88. As a result, the discharge-side front end of the bundle of recording media discharged from the stacking unit 94 hangs down due to its own weight, and is prevented from shifting the position due to contact with the stacked recording medium.

  Next, as shown in FIG. 4C, the recording medium pressing member 116 is raised immediately before the recording medium bundle is discharged to the second discharge portion 88 to avoid interference with the recording medium bundle. .

  Each time a bundle of recording media is discharged to the second discharge portion 88, the second discharge portion 88 descends according to the thickness of the recording medium discharged by the lifting device 90, and prepares for the next discharge.

  Next, the recording medium pressing member 116 will be described in detail.

  The recording medium pressing member 116 includes a main body portion 120 shown in FIG. 5 and a pressing portion 122 shown in FIG.

  The main body 120 is made of resin or metal, and is bent so that the rotating shaft mounting portion 124 and the pressing portion mounting portion 126 are separated by approximately 90 degrees. The rotating shaft attaching portion 124 is formed with a rotating shaft attaching hole 128 for attaching to the rotating shaft 118 described above. The pressing portion mounting portion 126 is formed with a pressing portion mounting hole 130 for mounting the pressing portion 122.

  The pressing portion mounting hole 130 opens toward the distal end on the rotating shaft mounting hole 128 side, opens in one axial direction of the rotating shaft, and the other side hits one side surface of the pressing portion 122. So that it is closed.

  The pressing portion mounting hole 130 includes a first curved surface portion 132 formed on the front end side, a second curved surface portion 134 formed on the rear end side, the first curved surface portion 132 and the second curved surface portion 134. And a first flat surface portion 136 formed on the back side so as to be connected. In the first plane portion 136, a positioned portion 138 is formed in a concave shape, for example.

  On the other hand, the pressing part 122 is made of a material whose hardness is lower than that of the main body part 120, for example, rubber. The JIS spring type hardness Hs may be 15 to 70. Furthermore, it is better if the hardness Hs is 25 to 35. Chloroprene rubber, nitrilo rubber, natural rubber, ethylene / propylene / diene rubber (EPDM) and the like can be used.

  The pressing portion 122 connects the third curved surface portion 140 formed on the front end side, the fourth curved surface portion 142 formed on the rear end side, and the third curved surface portion 140 and the fourth curved surface portion 142. And a second flat surface portion 144. A positioning portion 146 is formed on the second plane portion 144, for example, in a convex shape. Further, the pressing portion 122 is formed with an extending portion 148 extending from the third curved surface portion 140 and the fourth curved surface portion 142 to the distal end side.

  As shown in FIG. 7, the recording medium pressing member 116 is configured by fitting the pressing portion 122 into the pressing portion mounting hole 130 of the main body portion 120. The third curved surface portion 140 of the pressing portion 122 is in contact with the first curved surface portion 132 of the main body portion 120, the fourth curved surface portion 142 of the pressing portion 122 is in contact with the second curved surface portion 134 of the main body portion 120, and the main body portion. The second flat surface portion 144 of the pressing portion 122 is in contact with the first flat surface portion 136 of the 120. The positioning portion 146 of the pressing portion 122 is fitted into the positioned portion 138 of the main body portion 120, and the position of the pressing portion 122 with respect to the main body portion 120 is determined.

  Further, the extending part 148 of the pressing part 122 projects from the pressing part mounting hole 130 of the main body part 120.

  In addition, the first curved surface portion 132 of the main body portion 120 has a contact surface 150 that hits when the pressing portion 122 is bent to a predetermined range. That is, as shown in FIG. 8A, there is a gap between the third curved surface portion 140 of the pressing portion 122 and the contact surface 150 of the main body portion 120 before pressing the recording medium. As shown in FIG. 8B, when the pressing portion 122 is bent to a predetermined range, the third curved surface portion 140 of the pressing portion 122 comes into contact with the contact surface 150.

  Further, as shown in FIG. 8B, a contact surface 152 that gradually contacts the recording medium is formed by bending the pressing portion 122 on the recording medium side of the extending portion 148 of the pressing portion 122. . As shown in FIG. 8A, the angle α between the longitudinal tangent of the contact surface 152 and the recording medium when the pressing part 122 contacts the recording medium before the pressing part 122 is bent is less than 90 degrees. It is set to be.

Next, the operation of the recording medium pressing member 116 will be described.
As shown in FIG. 8 (a), when the recording medium is pressed, the first contact is with the rotation shaft side corner of the pressing portion 122. As described above, the contact surface 152 and the longitudinal tangent of the recording medium Is less than 90 degrees, the pressing portion 122 is bent, and the contact surface 152 that gradually comes into contact with the recording medium comes into contact with the recording medium from this corner. Since the pressing portion 122 is bent and deformed, the occurrence of the hitting sound of the recording medium pressing member 116 is reduced.

  Further, when the recording medium pressing member 116 rotates, the pressing portion 122 hits the contact surface 150 of the main body portion 120. At this timing, the recording medium pressing member 116 stops. When the recording medium pressing member 116 stops, the bending of the pressing portion 122 is restricted, and the recording medium presses the recording medium with a substantially constant pressing force accompanying the compression of the pressing portion 122, so that the recording medium is firmly stabilized. Then you can hold it down.

  In the description of the above embodiment, the recording medium pressing member is configured to press the recording medium discharged to the discharging unit that moves up and down of the post-processing device, but the present invention is not limited to this, for example, It can also be used to hold a recording medium discharged to a normal discharge unit, or to hold a document discharged to a discharge unit in a document feeder.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 18 Image forming apparatus main body 20 Post-processing apparatus 82 1st discharge part 88 2nd discharge part 116 Recording medium pressing member 120 Main body part 122 Press part 130 Press part attachment hole 150 Contact surface 152 Contact surface

Claims (7)

The main body,
A pressing portion that is provided on the main body, has a lower hardness than the main body, and presses the recording medium;
The said main-body part has a contact surface which the said press part contacts when the said press part is bent to the predetermined range Recording medium pressing member.   The recording medium pressing member according to claim 1, wherein the pressing portion is fitted into the main body portion.   The recording medium pressing member according to claim 1, wherein the pressing portion has a hardness Hs of 15 to 72.   The recording medium pressing member according to claim 1, wherein the pressing portion has a hardness Hs of 25 to 35.   The pressing portion has a contact surface that gradually contacts the recording medium when the pressing portion is bent, and the length of the contact surface when the pressing portion contacts the recording medium before the pressing portion is bent. The recording medium pressing member according to any one of claims 1 to 4, wherein an angle formed between the tangent line in the direction and the recording medium is less than 90 degrees. A discharge unit for discharging the recording medium;
A movement control unit for controlling the discharge unit to move in the direction of gravity;
A recording medium pressing member that presses the recording medium discharged to the discharge portion,
The recording medium pressing member is
The main body,
A pressing portion that is provided on the main body, has a lower hardness than the main body, and presses the recording medium on the discharge portion;
The said main-body part has a contact surface which the said press part contacts when the said press part is bent to the predetermined range. Post-processing apparatus. An image device main body for forming an image on a recording medium;
A post-processing device that performs post-processing on a recording medium on which an image is formed by the image forming main body,
The post-processing device includes:
A discharge unit for discharging the recording medium;
A movement control unit for controlling the discharge unit to move in the direction of gravity;
A recording medium pressing member that presses the recording medium discharged to the discharge portion,
The recording medium pressing member is
The main body,
A pressing portion that is provided on the main body, has a lower hardness than the main body, and presses the recording medium on the discharge portion;
The image forming apparatus according to claim 1, wherein the main body has a contact surface against which the pressing portion hits when the pressing portion is bent to a predetermined range.

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