JP5046988B2 - Sheet conveying apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to a sheet conveying apparatus and an image forming apparatus in which an opening / closing member that opens a sheet conveying path is provided so as to be openable and closable with respect to a predetermined closing position on the apparatus main body side.

  Conventionally, in image forming apparatuses such as copying machines, printers, facsimiles, and sheet conveying apparatuses such as post-processing apparatuses, feeding apparatuses, and image reading apparatuses connected thereto, a door that can be opened and closed is attached to a part of the apparatus. It has been. For example, in the image forming apparatus disclosed in Patent Document 1, a door that opens a sheet conveyance path is rotatably attached. When a sheet jam occurs inside the apparatus, the sheet conveyance path is opened by opening the door, and the jammed sheet can be removed.

Japanese Patent Laid-Open No. 2002-193459 (FIG. 6)

The door is attached to the apparatus main body so as to be rotatable about a rotation fulcrum, and the position of the door with respect to the apparatus main body is determined by the fulcrum. Therefore, if the position of the fulcrum of the door is shifted due to parts accuracy or assembly error, the gap between the door and the surrounding cover may become uneven or a step may occur when the door is closed. There was a problem that the texture of the material deteriorated. On the other hand, if a play (a certain amount of backlash) is provided on the fulcrum of the door to allow the above-described deviation , the door rattles when the door is opened and closed, resulting in a problem that the texture of the product is lowered. .

  The object of the present invention is to enable the positioning of the door and its surrounding members by releasing the restriction by the pivoting fulcrum when the door is closed by a simple and inexpensive configuration, and when the door is opened, the door that is rotating The present invention is to provide a sheet conveying apparatus and an image forming apparatus that are free from backlash.

The present invention for achieving the above object, a sheet conveying apparatus closing member to open the conveying path of the sheet is provided to be openable and closable with respect to a predetermined closed position of the apparatus body, the said apparatus body A hollow member provided on one of the opening / closing members, and a shaft member provided on the other of the device main body and the opening / closing member and fitted to the hollow member, and the opening / closing member is attached to the device main body. Fulcrum means for pivotally supporting the opening / closing member, and changing the fitting state of the hollow member and the shaft member according to the rotation angle of the opening / closing member with respect to the closed position, Restriction of movement of the opening / closing member in a state where the opening / closing member is opened beyond a predetermined angle with respect to the closing position, and the opening / closing member is closed within a predetermined angle with respect to the closing position. Rotation And carrying out the release of the restriction of the movement of non-direction.

In order to achieve the above object, the present invention includes an image forming unit that forms an image on a sheet, and an open / close member that opens the sheet conveyance path is provided to be openable and closable with respect to a predetermined closing position on the apparatus main body side. And a hollow member provided in one of the apparatus main body and the opening / closing member, and provided in the other of the apparatus main body and the opening / closing member and fitted with the hollow member. A shaft member, and a fulcrum means that rotatably supports the opening / closing member with respect to the apparatus main body, wherein the hollow member and the shaft member are arranged according to a rotation angle of the opening / closing member with respect to the closed position. By changing the fitting state, the movement of the opening / closing member in a state other than the rotation direction when the opening / closing member is opened beyond a predetermined angle with respect to the closing position, and the opening / closing member is closed. Predetermined for position Characterized in that to release the movement restriction other than the rotational direction of the closed state within the angle.

  According to the present invention, when the opening / closing member is moved within a predetermined angle with respect to the closed position, the movement restriction of the opening / closing member in the direction other than the rotation direction is released. Positioning of the member and the members around the closed position becomes possible. On the other hand, when the opening / closing member is opened beyond a predetermined angle from the closed position, the movement of the opening / closing member in a direction other than the rotation direction is restricted, so that it is possible to prevent deterioration in texture due to rattling during the rotation of the opening / closing member. Therefore, it is possible to provide a sheet conveying apparatus and an image forming apparatus having an opening / closing member with a simple and inexpensive configuration that does not deteriorate the texture of the product.

  Next, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. Absent.

[First Embodiment]
First, a schematic configuration of the image forming apparatus will be described with reference to FIG. FIG. 2 is a schematic sectional view showing the image forming apparatus.

  As shown in FIG. 2, in the image forming apparatus main body 1, a plurality of sheets 3 stacked on a feeding cassette 2 are separated and fed one by one by a feeding roller 4 and a separation conveyance roller 5, and a conveyance guide is provided. 6 is conveyed to the image forming process unit 7.

  The image forming process unit 7 is an image forming unit that forms an image (toner image) by electrophotography. Specifically, a laser scanner 9 irradiates light onto a photosensitive drum 8 as a charged image carrier to form an image, develops the image using toner, and transfers the toner image to a sheet. is there.

  The sheet on which the toner image has been transferred from the photosensitive drum 8 is conveyed to the fixing device 10 and heat and pressure are applied to fix the image.

  The sheet on which the image has been fixed is conveyed along the conveyance path 11 to the discharge roller 12, and is discharged to the stacking tray 13 by the discharge roller 12.

  In the image forming apparatus main body 1, a sheet conveyance path 11 is formed at a predetermined closed position, and a jam processing door 20 as an opening / closing member that opens the sheet conveyance path 11 can be opened and closed in order to perform sheet jam processing. Is provided. The jam processing door 20 is an opening / closing member for performing the jam processing of the conveyance path 11, and is rotatable about a fulcrum portion 21 as shown in FIG. 3. The fulcrum portion 21 is a fulcrum means that supports the jam processing door 20 so as to be rotatable with respect to the image forming apparatus main body 1. The jam processing door 20 is provided with a plurality of ribs 22 as conveyance guides that form a part of the sheet conveyance path 11. When the jam processing door 20 is moved to the closed position shown in FIG. 2, the rib 22 enters between the slits 24 provided in the conveyance guide 23 on the image forming apparatus main body 1 side, so that these guides are smoothly connected. The sheet is prevented from being caught during conveyance.

  Here, a fulcrum portion 21 (FIG. 3) that supports the jam processing door 20 to be rotatable with respect to the image forming apparatus main body 1 will be described with reference to FIG. 1A shows a fulcrum portion 21 when the jam processing door 20 is moved within a predetermined angle with respect to the closing position on the image forming apparatus main body 1 side, and FIG. 1B closes the jam processing door 20. The fulcrum part 21 is shown when opened beyond a predetermined angle with respect to the position.

  As shown in FIG. 1, the fulcrum portion 21 of the jam processing door 20 is fitted with a hole 25 provided in the image forming apparatus main body 1 and a shaft 26 provided in the jam processing door 20. Is rotatably supported with respect to the image forming apparatus main body 1. As shown in FIGS. 1 (a) and 1 (b), the hole 25 has a first restriction area A and a first restriction area in the rotation (opening / closing) direction of the jam handling door 20. It is a hollow member comprised by the 2nd control area | region B whose radius is smaller than A. FIG. The shaft 26 is a shaft member that includes a first restricting portion C and a second restricting portion D having a smaller radius than the first restricting portion C in the rotation direction of the jam handling door 20. The shape of the hole 25 on the image forming apparatus main body 1 is such that the restriction areas A and B are alternately provided along the circumferential direction, and the pair of restriction areas A and A and the restriction areas B and B face each other. It has become a shape. Further, the shape (here, rhombus shape) of the shaft 26 on the jam processing door 20 side is such that the restricting portions C and D are alternately provided along the circumferential direction so as to correspond to the restricting regions A and B. The restricting portions C and C and the restricting portions D and D are provided so as to face each other. The arrangement of the restriction regions A and B and the shape of the restriction portions C and D only have to correspond to each other, and the shape of the shaft 26 is not limited to the rhombus shape, but may be a hexagonal shape or an octagonal shape.

  In the state where the jam processing door 20 is closed at the closed position, only the first restricting portion C of the shaft 26 contacts the first restricting region A of the hole 25 as shown in FIG. The second restricting portion D is released from contact with the second restricting region B of the hole 25 and faces the first restricting region A with a predetermined interval. As a result, a gap is formed between the shaft 26 and the hole 25 at a position where the second restricting portion D and the first restricting region A are opposed to each other, and the jam processing door 20 is in one direction other than the rotation direction (the direction of arrow E). ) Is possible. That is, when the jam processing door 20 is closed within a predetermined angle with respect to the closing position, the movement restriction of the jam processing door 20 in the direction of arrow E is released.

  On the other hand, in a state in which the jam handling door 20 is opened beyond a predetermined angle with respect to the closed position, the first restricting portion C of the shaft 26 is moved to the first of the hole 25 as shown in FIG. While being in contact with the restriction region A, the second restriction portion D of the shaft 26 is in contact with the second restriction region B of the hole 25. Thereby, the jam processing door 20 is restricted from moving in directions other than the rotation direction. In this way, by changing the fitting state of the hole 25 and the shaft 26 according to the rotation angle of the jam processing door 20 with respect to the closed position, the movement of the jam processing door 20 other than the rotation direction, and the movement restriction are controlled. Release is performed.

  When the jam processing door 20 is closed within a predetermined angle with respect to the closed position by the fulcrum part 21 having the above-described configuration, the movement restriction in the direction other than the rotation direction at the fulcrum part 21 is released. As shown in FIG. 3, the jam processing door 20 is provided with a protrusion 27, and fits into a hole 28 provided on the image forming apparatus main body 1 side in a state in which the jam processing door 20 is closed. The protrusion 27 and the hole 28 are positioning portions for positioning and fixing the jam processing door 20 with respect to the image forming apparatus main body 1 when the jam processing door 20 is closed at the closed position. When the projection 27 and the hole 28 are fitted, the movement restriction at the fulcrum portion 21 is released. For this reason, a load is not applied to the jam processing door 20 with respect to the fulcrum part 21 and the gap is not deformed, and the gap with the surrounding cover and the sheet conveyance guide can be positioned other than the fitting of the fulcrum part 21. .

  Further, as shown in FIG. 4A, in the state where the movement of the fulcrum portion 21 is restricted in the direction other than the rotation direction, the locus of the tip portion of the rib 22 when the jam processing door 20 is opened and closed is indicated by a broken line. So as to interfere with the slit 24 (part 29 in the figure). However, according to the fulcrum part 21 configured as described above, the movement restriction in directions other than the rotation direction is released until the jam processing door 20 is opened beyond a predetermined angle. Therefore, in order to avoid interference between the rib 22 on the door side and the slit 24 on the image forming apparatus main body 1 side, as shown in FIG. Can be moved to. Thereby, in the state which closed the jam processing door 20 within the predetermined angle, the jam processing door 20 can be rotated so that interference of guides may be avoided. In addition, it is possible to avoid the appearance from deteriorating due to the position of the fulcrum protruding outside the apparatus in order to avoid interference between the guides.

  Furthermore, if the jam processing door 20 is opened beyond a predetermined angle, the movement of the fulcrum portion 21 other than the rotation direction is restricted, so that it is possible to suppress the rattling of the door being opened and closed and to reduce the texture. There is no.

  As another modified example of the fulcrum portion 21 (FIG. 3) having the hole 25 and the shaft 26 described above, the present invention is also effective in the following configuration. As shown in FIG. 1C and FIG. 1D, the hole 25 has a first restriction region in the rotation (opening / closing) direction of the jam handling door 20 in the same manner as the above-described embodiment. A hollow member composed of A and a second restriction region B having a smaller radius than the first restriction region A. In this modification, the shaft 26 is a shaft member composed of a plurality of restricting portions F whose outer circumferences all have the same radius in the rotation direction of the jam handling door 20.

  In a state where the jam handling door 20 is closed at the closed position, at least one of the plurality of restricting portions F faces the first restricting region A with a predetermined interval. Here, as shown in FIG. 1C, the two restricting portions F that are part of the restricting portion F of the shaft 26 abut against the second restricting region B of the hole 25, and the other two restricting portions. F faces the first restriction area A of the hole 25 with a predetermined interval. As a result, a gap is formed between the shaft 26 and the hole 25 at a position where the restricting portion F and the first restricting region A are opposed to each other, and the jam processing door 20 is moved in one direction (arrow E direction) other than the rotation direction. It can be moved. That is, when the jam processing door 20 is closed within a predetermined angle with respect to the closing position, the movement restriction of the jam processing door 20 in the direction of arrow E is released.

  On the other hand, in a state where the jam handling door 20 is opened beyond a predetermined angle with respect to the closed position, all of the restriction portions F of the shaft 26 are the second restriction of the hole 25 as shown in FIG. It contacts the region B. Thereby, the jam processing door 20 is restricted from moving in directions other than the rotation direction. In this way, by changing the fitting state of the hole 25 and the shaft 26 according to the rotation angle of the jam processing door 20 with respect to the closed position, the movement of the jam processing door 20 other than the rotation direction, and the movement restriction are controlled. Release is performed.

  As described above, when the door is closed within a predetermined angle with respect to the closed position by the fulcrum portion having a simple and inexpensive configuration, the movement restriction in the direction other than the rotation direction of the door is released, and the door and its surrounding cover are released. And positioning with the transport guide becomes possible. Further, when the door is opened beyond a predetermined angle with respect to the closed position, the movement of the door in a direction other than the rotation direction is restricted, and deterioration of the texture due to rattling of the rotating door can be prevented.

[Second Embodiment]
With reference to FIG. 5, another form of a fulcrum portion (fulcrum means) that supports the jam processing door 20 to be rotatable with respect to the image forming apparatus main body 1 will be described. 5A shows a fulcrum portion when the jam processing door 20 is closed within a predetermined angle with respect to the closing position on the image forming apparatus main body 1 side, and FIG. 5B shows the jam processing door 20 in the closed position. The fulcrum part when opened beyond a predetermined angle is shown.

  As shown in FIG. 5, the fulcrum portion 70 of the jam processing door 20 is fitted with a hole 71 provided in the image forming apparatus main body 1 and a shaft 72 provided in the jam processing door 20, thereby causing the jam processing door 20 to be engaged. Is rotatably supported with respect to the image forming apparatus main body 1. The hole 71 is a hollow member made of rubber 73 having a part of the inner periphery in the rotational direction of the jam handling door 20 that is an elastic body. The shaft 72 is a shaft member composed of a plurality of restricting portions 74 whose outer periphery has the same radius. Here, the shape of the shaft 72 exemplifies a quadrangular shape that is in contact with the inner periphery of the hole 71 at four restricting portions 74 (74a, 74b).

  In the state where the jam processing door 20 is closed at the closed position, as shown in FIG. 5A, a part of the restricting portion 74a abuts on a region other than the rubber 73 (an inner peripheral surface other than the elastic body). In the state, the other restricting portion 74 b comes into contact with the rubber 73. Thereby, the rubber 73 is elastically deformed at the contact position of the other restricting portion 74b and the rubber 73, so that the jam processing door 20 can move in one direction (arrow direction) other than the rotation direction. . That is, in a state where the jam processing door 20 is closed within a predetermined angle with respect to the closing position, the movement restriction in the direction of the arrow is released.

  On the other hand, in a state where the jam processing door 20 is opened beyond a predetermined angle with respect to the image forming apparatus main body 1, all the restricting portions 74 of the shaft 72 are other than the rubber 73 as shown in FIG. (The inner peripheral surface other than the elastic body). Thereby, the jam processing door 20 is restricted from moving in directions other than the rotation direction. In this way, by changing the fitting state of the hole 71 and the shaft 72 according to the rotation angle of the jam processing door 20 with respect to the closed position, the movement of the jam processing door 20 other than the rotation direction, and the movement control Release is performed.

  Accordingly, it is possible to configure a jam processing door that has the same effect as the above-described embodiment and can be opened and closed more smoothly than the above-described embodiment. In the present embodiment, the rubber 73 as the elastic body is provided at two opposing locations on the inner periphery of the hole 71. However, the present invention is not limited to this, and movement restriction other than the rotational direction is possible as long as it is provided at least one location. Is released.

[Third Embodiment]
With reference to FIG. 6, another form of a fulcrum portion (fulcrum means) that supports the jam processing door 20 so as to be rotatable with respect to the image forming apparatus main body 1 will be described. FIG. 6A shows a fulcrum portion when the jam processing door 20 is closed within a predetermined angle with respect to the image forming apparatus main body 1, and FIG. 6B shows the jam processing door 20 on the image forming apparatus main body 1. On the other hand, the fulcrum part when opened beyond a predetermined angle is shown.

  As shown in FIG. 6, the fulcrum portion 80 of the jam processing door 20 is fitted with a hole 81 provided in the image forming apparatus main body 1 and a shaft 82 provided in the jam processing door 20, whereby the jam processing door 20. Is rotatably supported with respect to the image forming apparatus main body 1. The hole 81 is a hollow member constituted by an arm portion 83 as an elastic body capable of bending a part of the inner periphery in one direction of the jam handling door 20. The shaft 82 is a shaft member composed of a plurality of restricting portions 84 whose outer periphery has the same radius. Here, the shape of the shaft 82 exemplifies a quadrangular shape that contacts the inner periphery of the hole 81 with four restricting portions 84 (84a, 84b).

  In a state where the jam processing door 20 is closed, as shown in FIG. 6A, a part of the restricting portion 84a is in contact with a region other than the arm portion 83 (an inner peripheral surface other than the arm portion). The other restricting portion 84 b comes into contact with the arm portion 83. Thereby, the arm part 83 bends at the contact position of the other restricting part 84b and the arm part 83, so that the jam processing door 20 can move in one direction (arrow direction) other than the rotation direction. Become. That is, when the jam processing door 20 is closed within a predetermined angle with respect to the image forming apparatus main body 1, the movement restriction in the arrow direction is released.

  On the other hand, when the jam processing door 20 is opened beyond a predetermined angle with respect to the image forming apparatus main body 1, as shown in FIG. It contacts the area other than (the inner peripheral surface other than the arm part). Thereby, the jam processing door 20 is restricted from moving in directions other than the rotation direction. Thus, by changing the fitting state of the hole 81 and the shaft 82 in accordance with the rotation angle of the jam processing door 20 with respect to the closed position, the movement of the jam processing door 20 other than the direction of rotation, and the movement restriction are controlled. Release is performed.

  As a result, the same effect as that of the above-described embodiment can be obtained, and at the same time, a jam processing door that is cheaper than that of the above-described embodiment can be configured. In the present embodiment, the arm portion 83 as an elastic body is provided at two opposing locations on the inner periphery of the hole 81, but is not limited to this, and if it is provided at least at one location, it moves in a direction other than the rotational direction. Regulations are lifted.

[Other Embodiments]
In the above-described embodiment, the opening / closing member provided in the image forming apparatus main body 1 has been described as an example. However, the present invention is not limited to this. For example, it may be an opening / closing member of a sheet conveying apparatus such as an image reading apparatus connected to the image forming apparatus main body 1, a sheet feeding apparatus, or a finisher.

  Here, a sheet processing apparatus connected to the image forming apparatus main body 1 will be described as an example of the sheet conveying apparatus. As shown in FIG. 7, the sheet processing apparatus 47 is connected to the side surface of the image forming apparatus main body 1.

  The image forming apparatus shown in FIG. 7 has substantially the same configuration as the image forming apparatus described above, and members having the same functions are denoted by the same reference numerals and description thereof is omitted. In the image forming apparatus main body 1, a conveyance path switching member 31 is provided on the downstream side of the fixing device 10, and the sheet is conveyed to either the face-up conveyance path 32 or the switchback conveyance path 33 that reverses the sheet up and down. The direction is switched.

  The sheet sent to the switchback conveyance path 33 is conveyed by the switchback conveyance roller 34 until the trailing edge of the sheet passes the reverse switching member 35. Thereafter, the switchback conveying roller 34 rotates in the reverse direction, whereby the sheet is conveyed in an upside down state with the trailing edge side as the leading edge. At this time, when the reverse switching member 35 is switched, the reversed sheet is sent to the face-down conveyance path 36.

  The face-up conveyance path 32 and the face-down conveyance path 36 merge before the discharge roller 37. Therefore, both the sheet guided to the face-up conveyance path 32 and the sheet that has passed the switch-down conveyance path 33 through the face-down conveyance path 36 are discharged from the image forming apparatus main body 1 by the discharge roller 37.

  An image reading device 38 is connected to the upper portion of the image forming apparatus main body 1, and the image reading device 38 includes a scanner unit 39 and an automatic document feeding unit (hereinafter referred to as ADF) 40. The ADF 40 separates and feeds a plurality of documents stacked on the document stacking tray 41 one by one by a feed roller 42 and passes the document reading position 43 where the optical carriage 45 of the scanner unit 39 is stopped. It is. The ADF 40 can be opened and closed rearward about a hinge (not shown) at the rear of the apparatus, and is opened and closed when a document is placed on the document table glass 44.

  The scanner unit 39 includes a movable optical carriage 45, and reads information described in a document. In the scanner unit 39, the document information is read while the optical carriage 45 scans the document placed on the document table glass 44 in the horizontal direction, and is photoelectrically converted by the CCD 46. When the original is read by the ADF 40, the optical carriage 45 stops at the original reading position 43 as described above and reads the description information of the original being conveyed.

  The sheet processing apparatus 47 is connected to the side surface of the image forming apparatus main body 1, receives a sheet discharged from the image forming apparatus main body 1 by the discharge roller 37, and performs a stapling process. When the sheet is discharged from the image forming apparatus main body 1, the sheet is sent to the staple conveyance path 49 or the distribution conveyance path 50 by the switching member 48 provided at the entrance of the sheet processing apparatus 47. The sheet sent to the staple conveyance path 49 is conveyed by the intermediate conveyance roller 51 and once stacked on the intermediate stacking unit 52. The sheets stacked on the intermediate stacking unit 52 are aligned in the direction orthogonal to the conveyance direction by the width direction alignment joggers 53 that are arranged on both sides in the sheet width direction and are movable in the direction orthogonal to the sheet conveyance direction. The conveying direction is aligned by the alignment roller 54. When a predetermined number of sheets are aligned in the intermediate stacking unit 52, the sheets are closed by a stapler (not shown) and discharged to the stacking tray 56 by the discharge roller 55. In the case where the stapling process is not performed, the sheet is directly discharged to the stacking tray 56 without being stacked on the intermediate stacking unit 52.

  The sheet sent to the sorting and conveying path 50 by the switching member 48 is conveyed by the conveying roller 57, switched again by the second switching member 58, and sorted and stacked on the two upper stacking trays 59 and 60.

  The sheet processing apparatus 47 is provided with a jam processing door 61 that can be opened and closed as an opening / closing member that opens the sheet conveyance path in order to perform jam processing of sheets in the sheet processing apparatus. The jam processing door 61 is an opening / closing member for performing the jam processing of the conveyance path, and is provided so as to be rotatable in the vertical direction (arrow direction in the drawing) around the fulcrum portion 62 at the rear of the apparatus as shown in FIG. It has been. The fulcrum portion 62 is a fulcrum means that supports the jam processing door 61 so as to be rotatable with respect to the sheet processing apparatus 47. In addition, the structure of this fulcrum part 62 may be any structure of the fulcrum part illustrated using FIG.1, FIG.5, FIG.6.

  When the jam processing door 61 is closed within a predetermined angle with respect to the sheet processing apparatus 47 by the fulcrum part 62 having the above-described configuration, the fulcrum part 62 moves in a direction other than the rotation direction at the fulcrum part 62. Regulations are lifted. As shown in FIG. 8, the jam processing door 61 is provided with a protrusion 63a, and is fitted into a hole 63b provided on the sheet processing apparatus 47 side in a state in which the jam processing door 61 is closed. The protrusion 63 a and the hole 63 b are positioning portions that position and fix the jam processing door 61 with respect to the sheet processing apparatus 47 when the jam processing door 61 is closed. When the protrusion 63a and the hole 63b are fitted, the movement restriction at the fulcrum 62 is released. For this reason, the jam handling door 61 is positioned with respect to the surrounding cover 64 by the positioning portions 63a and 63b.

  The jam handling door 61 forms a part of a front exterior cover that is in front of the apparatus. For this reason, if the gap with the cover 64 is shifted or a step is generated, it is very noticeable and the texture of the product is deteriorated. However, with the above configuration, the jam processing door 61 and the cover 64 are directly positioned on the front side of the apparatus. be able to. Accordingly, it is possible to accurately align the cover on the front side of the apparatus, and to treat the exterior displacement due to the component accuracy or the like on the back side, which is the inconspicuous side of the apparatus.

  On the other hand, when the jam processing door 61 is opened with respect to the sheet processing apparatus 47 beyond a predetermined angle, the movement of the fulcrum portion 62 other than the rotation direction is restricted, so that rattling of the door being opened and closed is suppressed. Can be done without dropping the texture.

  As described above, when the door is closed within a predetermined angle by the fulcrum portion having a simple and inexpensive configuration, the movement restriction to the direction other than the rotation direction of the door is released, and the door and the surrounding cover and the conveyance guide are separated. Positioning is possible. Further, when the door is opened beyond a predetermined angle, the movement of the door in a direction other than the rotation direction is restricted, and deterioration of the texture due to rattling of the rotating door can be prevented.

  In the above-described embodiment, the hollow member constituting the fulcrum means is provided on the sheet processing apparatus 47 side and the shaft member is provided on the opening / closing member side. However, the present invention is not limited to this. A configuration in which the shaft member is provided on the sheet processing apparatus 47 side may be provided on the opening / closing member side.

  In the above-described embodiment, the sheet processing apparatus such as the finisher is exemplified as the sheet conveying apparatus connected to the image forming apparatus. However, the sheet conveying apparatus is not limited thereto, and the sheet conveying apparatus such as the sheet feeding apparatus and the image reading apparatus is used. Even if the present invention is applied, the same effect can be obtained.

Explanatory drawing of the fulcrum part of the jam processing door which concerns on 1st Embodiment. Side sectional view of image forming apparatus Perspective view of image forming apparatus Explanatory drawing of the fulcrum part when opening and closing the jam handling door Explanatory drawing of the fulcrum part of the jam processing door which concerns on 2nd Embodiment Explanatory drawing of the fulcrum part of the jam processing door which concerns on 3rd Embodiment Side sectional view of image forming apparatus and sheet processing apparatus Perspective view of image forming apparatus and sheet processing apparatus

Explanation of symbols

A ... First restriction area B ... Second restriction area C ... First restriction part D ... Second restriction part 1 ... Image forming apparatus 7 ... Image forming process unit 11 ... Conveyance path 20, 61 ... Jam processing door 21, 62, 70, 80 ... fulcrum parts 25, 71, 81 ... holes 26, 72, 82 ... shafts 27, 63 a ... projections 28, 63 b ... holes 73 ... rubber 74, 84 ... restriction parts 83 ... arm parts

Claims (12)

An open / close member that opens a sheet conveyance path is a sheet conveyance device provided to be openable and closable with respect to a predetermined closing position on the apparatus main body side,
A hollow member provided on one of the apparatus main body and the opening / closing member; and a shaft member provided on the other of the apparatus main body and the opening / closing member and fitted to the hollow member, the opening / closing member And a fulcrum means that rotatably supports the apparatus body,
By changing the fitting state of the hollow member and the shaft member according to the rotation angle of the opening / closing member with respect to the closed position,
Restriction of movement of the opening / closing member in a state where the opening / closing member is opened beyond a predetermined angle with respect to the closed position, and the opening / closing member is within a predetermined angle with respect to the closed position. A sheet conveying apparatus that releases movement restrictions other than the rotation direction in the closed state. The hollow member is configured by a first restriction region and a second restriction region having a radius smaller than that of the first restriction region, and the shaft member has an outer periphery of the first restriction portion and the first restriction portion. Consists of a second restriction part with a smaller radius than the restriction part ,
In a state where the opening / closing member is opened beyond a predetermined angle with respect to the closed position, the first restricting portion comes into contact with the first restricting region, and the second restricting portion is in the second position. The movement of the opening / closing member in a direction other than the rotation direction is restricted.
In a state where the opening / closing member is closed within a predetermined angle with respect to the closing position, the first restricting portion abuts on the first restricting region, and the second restricting portion is the first restricting portion. The sheet conveying apparatus according to claim 1, wherein the movement restriction other than the rotation direction is canceled by facing the area with a predetermined interval. The hollow member is configured by a first control region and a second control region having a smaller radius than the first control region, and the shaft member is configured by a plurality of control portions having the same radius. ,
In a state where the opening / closing member is opened beyond a predetermined angle with respect to the closing position, all the restricting portions are in contact with the second restricting region, and movement of the opening / closing member other than the rotation direction is restricted. ,
In a state where the opening / closing member is closed within a predetermined angle with respect to the closing position, at least one of the plurality of restricting portions is opposed to the first restricting region with a predetermined interval. The sheet conveying apparatus according to claim 1, wherein the movement restriction other than the rotation direction is released. The hollow member has a part of the inner periphery made of an elastic body, and the shaft member has an outer periphery made up of a plurality of restricting portions having the same radius .
In a state where the opening / closing member is opened beyond a predetermined angle with respect to the closing position, all the restricting portions abut on a region other than the elastic body and movement of the opening / closing member other than in the rotation direction is restricted. ,
In a state in which the opening / closing member is closed within a predetermined angle with respect to the closing position, movement restriction other than the rotation direction is caused by at least one restriction part contacting the elastic body among the plurality of restriction parts. The sheet conveying apparatus according to claim 1, wherein the sheet conveying device is released. In the hollow member , a part of the inner periphery is configured by an arm portion that can be bent, and the outer periphery is configured by a plurality of regulating portions having the same radius , the shaft member ,
In a state where the opening / closing member is opened beyond a predetermined angle with respect to the closing position, all the restricting portions abut on a region other than the arm portion, and movement of the opening / closing member other than the rotation direction is restricted. ,
In a state where the opening and closing member is closed within a predetermined angle with respect to the closing position, the movement restriction is released by at least one of the plurality of restriction portions coming into contact with the arm portion. The sheet conveying apparatus according to claim 1.   6. The positioning device according to claim 1, further comprising a positioning portion that positions and fixes the opening / closing member with respect to the apparatus main body when the opening / closing member is closed with respect to the closing position. Sheet conveying device. An image forming apparatus having an image forming unit for forming an image on a sheet, wherein an opening / closing member that opens a sheet conveyance path is provided so as to be openable and closable with respect to a predetermined closing position on the apparatus main body side,
A hollow member provided on one of the apparatus main body and the opening / closing member; and a shaft member provided on the other of the apparatus main body and the opening / closing member and fitted to the hollow member, the opening / closing member And a fulcrum means that rotatably supports the apparatus body,
By changing the fitting state of the hollow member and the shaft member according to the rotation angle of the opening / closing member with respect to the closed position,
Restriction of movement of the opening / closing member in a state where the opening / closing member is opened beyond a predetermined angle with respect to the closed position, and the opening / closing member is within a predetermined angle with respect to the closed position. An image forming apparatus, wherein movement restriction other than the rotation direction in the closed state is released. The hollow member is configured by a first restriction region and a second restriction region having a radius smaller than that of the first restriction region, and the shaft member has an outer periphery of the first restriction portion and the first restriction portion. Consists of a second restriction part with a smaller radius than the restriction part ,
In a state where the opening / closing member is opened beyond a predetermined angle with respect to the closed position, the first restricting portion comes into contact with the first restricting region, and the second restricting portion is in the second position. The movement of the opening / closing member in a direction other than the rotation direction is restricted.
In a state where the opening / closing member is closed within a predetermined angle with respect to the closing position, the first restricting portion abuts on the first restricting region, and the second restricting portion is the first restricting portion. The image forming apparatus according to claim 7, wherein the movement restriction other than the rotation direction is canceled by facing the area with a predetermined interval. The hollow member is configured by a first control region and a second control region having a smaller radius than the first control region, and the shaft member is configured by a plurality of control portions having the same radius. ,
In a state where the opening / closing member is opened beyond a predetermined angle with respect to the closing position, all the restricting portions are in contact with the second restricting region, and movement of the opening / closing member other than the rotation direction is restricted. ,
In a state where the opening / closing member is closed within a predetermined angle with respect to the closing position, at least one of the plurality of restricting portions is opposed to the first restricting region with a predetermined interval. The image forming apparatus according to claim 7, wherein movement restrictions other than the rotation direction are released. The hollow member has a part of the inner periphery made of an elastic body, and the shaft member has an outer periphery made up of a plurality of restricting portions having the same radius .
In a state where the opening / closing member is opened beyond a predetermined angle with respect to the closing position, all the restricting portions abut on a region other than the elastic body and movement of the opening / closing member other than in the rotation direction is restricted. ,
In a state in which the opening / closing member is closed within a predetermined angle with respect to the closing position, movement restriction other than the rotation direction is caused by at least one restriction part contacting the elastic body among the plurality of restriction parts. The image forming apparatus according to claim 7, wherein the image forming apparatus is released. In the hollow member , a part of the inner periphery is configured by an arm portion that can be bent, and the outer periphery is configured by a plurality of regulating portions having the same radius , the shaft member ,
In a state where the opening / closing member is opened beyond a predetermined angle with respect to the closing position, all the restricting portions abut on a region other than the arm portion, and movement of the opening / closing member other than the rotation direction is restricted. ,
In a state in which the opening / closing member is closed within a predetermined angle with respect to the closing position, movement restriction other than the rotation direction is caused by at least one restriction part contacting the arm part among the plurality of restriction parts. The image forming apparatus according to claim 7, wherein the image forming apparatus is released.   12. The positioning device according to claim 7, further comprising a positioning portion that positions and fixes the opening / closing member with respect to the apparatus main body when the opening / closing member is closed with respect to the closing position. Image forming apparatus.

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