JP2018052631A - Post-processing apparatus and image formation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a post-processing apparatus and an image formation apparatus that can excellently store discharged sheets.SOLUTION: A post-processing apparatus comprises: a first loading tray which can rotate on a sheet discharging-directional downstream side as a first fulcrum of rotation so as to lift a sheet discharging-directional upstream side, and stacks discharged sheets; a second loading tray which can rotate on the sheet discharging-directional upstream side as a second fulcrum of rotation to lift the sheet discharging-directional downstream side, and stacks discharged sheets; and elevation means for lifting the first loading tray and second loading tray. The first loading tray and second loading tray are installed obliquely at a predetermined angle so as to lift the sheet discharging-directional downstream side with respect to the sheet discharging-directional upstream side, and rotates simultaneously, in receiving a discharged sheet, to move in parallel in a direction crossing a sheet discharging direction with a loading plane, formed of the first loading tray and second loading tray, inclined at a predetermined angle.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a post-processing apparatus and an image forming apparatus.

  A plurality of paper discharge trays for discharging sheets, a support member that supports the paper discharge tray so as to be vertically movable over the entire moving distance, and a vertical driving means for moving the paper discharge tray in the vertical direction In the sheet stacking apparatus, the vertical driving means is provided so as to be shared by a plurality of paper discharge trays, and the driving force from the vertical driving means is transmitted to and cut off from each of the paper discharge trays. 2. Description of the Related Art A paper stacking device having a driving force switching unit that can be arbitrarily set and a locking unit that can be stopped / released at an arbitrary position is known (Patent Document 1).

  Provided on the upper stage of the apparatus main body, and discharges paper that has been scanned along the set original to be scanned and conveyed image information on the original surface, and stacks the paper discharged by the paper discharge means There is also known a paper discharge device including a stacking unit, a blowing unit that blows air to a sheet from between the sheet discharging unit and the stacking unit, and a control unit that controls the blowing unit according to the sheet information ( Patent Document 2).

JP 2003-95513 A JP 2013-136453 A

  SUMMARY An advantage of some aspects of the invention is that it provides a post-processing apparatus and an image forming apparatus that can well accommodate discharged sheets.

In order to solve the above problem, a post-processing apparatus according to claim 1,
A first stacking tray for stacking sheets to be discharged that can be rotated so as to lift the upstream side in the paper discharge direction with the downstream side in the paper discharge direction as a first rotation fulcrum;
A second stacking tray for stacking sheets to be rotated and discharged so as to lift the downstream side in the paper discharge direction with the upstream side in the paper discharge direction as a second rotation fulcrum;
Elevating means for lifting the first stacking tray and the second stacking tray,
The first stacking tray and the second stacking tray are installed at a predetermined angle so as to lift the downstream side in the paper discharge direction with respect to the upstream side in the paper discharge direction, and the discharged paper is When receiving, the stacking surface formed by the first stacking tray and the second stacking tray rotates at the same time and translates in a direction intersecting with the sheet discharge direction while being inclined at the predetermined angle.
It is characterized by that.

The invention according to claim 2 is the post-processing apparatus according to claim 1,
The elevating means includes a first cam surface that contacts the first stacking tray at a center of gravity when the sheets are stacked on the first stacking tray and the second stacking tray, and the second stacking tray. The second cam surface that contacts the tray is a cam means formed coaxially, and the first stacking tray and the second stacking tray are rotated simultaneously.
It is characterized by that.

The invention according to claim 3 is the post-processing apparatus according to claim 1,
A third stacking tray for stacking the discharged sheets that can be translated in a direction intersecting the sheet discharge direction with respect to the stacking surface formed by the first stacking tray and the second stacking tray is further provided. ,
It is characterized by that.

The invention according to claim 4 is the post-processing apparatus according to claim 3,
The third stacking tray has one end rotatably supported at one end upstream of the first stacking tray in the sheet discharge direction, and one end downstream of the second stacking tray in the sheet discharge direction. A second link portion rotatably supported on the side of the first link tray and a second link portion rotatably connected to each other end, and the first stack tray and the second stack tray constitute a pantograph mechanism to form the first link tray. The stacking tray and the second stacking tray rotate at the same time and translate in a direction intersecting the sheet discharge direction, and the first link portion forms a stacking surface;
It is characterized by that.

The invention according to claim 5 is the post-processing apparatus according to claim 3 or 4,
The first link portion has an extension portion having a rotation fulcrum on the other end side, and the extension portion is supported from the back surface on the other end side of the second link portion and rotates in a direction intersecting with the paper discharge direction. Forming a loading surface that can be supported,
It is characterized by that.

In order to solve the above problem, an image forming apparatus according to claim 6,
The post-processing according to any one of claims 1 to 5, wherein an in-cylinder space is formed between the apparatus housing and the image reading unit, and post-processing is performed on a sheet on which an image is recorded in the in-cylinder space. Equipped with processing equipment,
It is characterized by that.

According to the first aspect of the present invention, compared with the case where the first stacking tray and the second stacking tray are not inclined in a predetermined angle and do not have a structure that translates in a direction intersecting the sheet discharge direction. Thus, the discharged paper can be stored well.
According to the second aspect of the invention, it is possible to simultaneously rotate the first stacking tray and the second stacking tray while improving the torque transmission efficiency.
According to the third aspect of the invention, it is possible to better accommodate the discharged paper while increasing the discharge speed.
According to the fourth aspect of the present invention, the third stacking tray can be translated in parallel with the stacking surface formed by the first stacking tray and the second stacking tray.
According to the fifth aspect of the present invention, it is possible to better accommodate a large size paper.
According to the sixth aspect of the present invention, it is possible to satisfactorily accommodate the discharged paper while suppressing an increase in space.

1 is an external front view showing a main part of an image forming apparatus. 2 is a cross-sectional configuration diagram illustrating an internal configuration of an image forming unit. FIG. It is a perspective view which shows the stacking tray part of a post-processing apparatus. (A) is a perspective view which shows the stacking surface side of the 1st stacking tray, (b) is a perspective view which shows the back surface side. (A) is a perspective view which shows the stacking surface side of the 2nd stacking tray, (b) is a perspective view which shows the back surface side. It is a disassembled perspective view which shows the structure of a 3rd stacking tray. (A) is a schematic front view showing a state in which the stacking tray portion T is lifted, and (b) is a schematic front view showing a state in which the stacking tray portion T is fully lowered. FIG. 6 is a schematic diagram illustrating formation of a stacking surface by a first stacking tray, a second stacking tray, and a third stacking tray in the stacking tray unit T.

Next, the present invention will be described in more detail with reference to the drawings with reference to embodiments and specific examples. However, the present invention is not limited to these embodiments and specific examples.
Also, in the description using the following drawings, it should be noted that the drawings are schematic and the ratio of each dimension and the like are different from the actual ones, and are necessary for the description for easy understanding. Illustrations other than the members are omitted as appropriate.
In order to facilitate understanding of the following description, in the drawings, the front-rear direction is the X-axis direction, the left-right direction is the Y-axis direction, and the up-down direction is the Z-axis direction.

(1) Overall Configuration and Operation of Image Forming Apparatus FIG. 1 is an external front view showing the main part of the image forming apparatus 1 according to this embodiment, and FIG. 2 is a schematic sectional view showing the internal structure of the image forming apparatus 1.
Hereinafter, the overall configuration and operation of the image forming apparatus 1 will be described with reference to the drawings.

(1.1) Overall Configuration In the image forming apparatus 1, an image forming unit 2 that forms an image by an electrophotographic method and an image reading unit 3 that reads a document or the like are supported above the image forming unit 2 by a support unit 4. Has been configured.
An in-body space S is formed between the image forming unit 2 and the image reading unit 3, and a post-processing device 200 that performs binding processing and the like on the paper P discharged from the discharge roller pair 63 (see FIG. 2) is installed. ing.

  The image forming unit 2 includes a control device 10, a paper feeding device 20, a photosensitive unit 30, a developing device 40, a transfer device 50, and a fixing device 60 arranged in an internal space formed by a housing F (not shown). The body F (not shown) is configured to be covered with a plurality of divided exterior members.

  The in-body space S between the image forming unit 2 and the image reading unit 3 is covered with a front cover 201 included in the post-processing device 200, and the main body of the post-processing device 200 is hidden from the operator.

  On the front side of the image reading unit 3, an operation information unit 70 as a user interface is arranged. The operation information unit 70 is configured by combining a liquid crystal display panel, various operation buttons, a touch panel, and the like, and the user of the image forming apparatus 1 inputs various settings and instructions via the operation information unit 70. Various information is displayed to the user of the image forming apparatus 1 via the liquid crystal display panel.

(1.2) Image Forming Unit The control device 10 includes an image forming device control unit 11 that controls the operation of the image forming device 1, a controller unit 12 that prepares image data according to a print processing request, a power supply device 13, and the like. Have.

  At the bottom of the image forming unit 2, a paper feeding device 20 on which a large number of recording media P are stacked is provided. The paper P whose position in the width direction is determined by a regulating plate (not shown) is 1 from the top. Each sheet is pulled forward (−X direction) by the sheet drawer 22 and then conveyed to the nip portion of the registration roller pair 23.

  The photoconductor unit 30 includes a photoconductor drum 31 that is provided in parallel above the sheet feeding device 20 (Z direction) and is driven to rotate. Yellow (Y), magenta (M), cyan (C), and black (K) toner images are formed on the respective photosensitive drums 31 by the respective developing devices 40.

  Each color toner image formed on the photosensitive drum 31 of each photosensitive unit 30 is sequentially electrostatically transferred (primary transfer) onto the intermediate transfer belt 51 of the transfer device 50 to form a superimposed toner image in which the respective color toners are superimposed. Is done. The superimposed toner image on the intermediate transfer belt 51 is sent out from the registration roller pair 23 and is collectively transferred by the secondary transfer roller 52 onto the paper P guided by the conveyance guide.

The sheet P on which the toner images are collectively transferred in the transfer device 50 is conveyed to the fixing device 60 via the conveyance guide in a state where the toner images are not fixed, and is heated by the pair of fixing rollers 61 and the pressure roller 62. The toner image is fixed by the action of pressure bonding.
The sheet P on which the fixed toner image is formed is guided by a conveyance guide, sent out from the discharge roller pair 63 to the post-processing device 200 disposed in the in-body space S, subjected to predetermined post-processing, and then stacked. It is discharged onto the tray portion T.

(2) Post-Processing Device FIG. 3 is a perspective view showing the stacking tray portion T of the post-processing device 200, FIG. 4A is a perspective view showing the stacking surface side of the first stacking tray 220, and FIG. FIG. 5A is a perspective view showing the stacking surface side of the second stacking tray 230, FIG. 5B is a perspective view showing the back surface side, and FIG. 6 shows the configuration of the third stacking tray 240. FIG. 7A is an exploded perspective view, FIG. 7A is a schematic front view showing a state where the stacking tray portion T is lifted, and FIG. 7B is a schematic front view showing a state where the stacking tray portion T is fully lowered.
Hereinafter, the configuration of the stacking tray portion T in the post-processing apparatus 200 will be described with reference to the drawings.

  As shown in FIG. 3, the post-processing device 200 includes a main body 210 that performs a binding process on the paper P fed from the discharge roller pair 63, and a post-processed paper bundle PB and sheets discharged from the discharge roller 211. It is composed of a stacking tray portion T that receives and stacks sheets P.

  The stacking tray unit T includes a first stacking tray 220, a second stacking tray 230, and a third stacking tray 240.

As shown in FIG. 4, the first stacking tray 220 has a stacking surface 220 a that is inclined from one end side, which is the upstream side (A), in the paper transport direction, to the other end side, which is the downstream side (B), in the paper discharge direction. Have.
Further, a shaft portion 221a that becomes a rotation fulcrum 221 is provided on the other end side that is downstream in the paper discharge direction, and is rotatably supported by the main body of the post-processing apparatus 200. As a result, a first cam surface 251 of a cam member 250, which will be described later, rotates in contact with the side portion 220b of the first stacking tray 220, thereby tilting at a predetermined angle so as to lift the upstream side in the paper discharge direction. Be placed.
Here, the predetermined angle is an angle Θ at which the sheet bundle PB and the sheets P discharged onto the stacking tray portion T by the discharge roller 211 can slide down on the stacking surface 220a toward the wall surface 212 by their own weight (see FIG. 7B). ).

As shown in FIG. 5, the second stacking tray 230 has an inclined surface 230a that inclines toward the other end side that is the downstream side in the paper discharge direction from the one end side that is the upstream side in the paper conveyance direction, and the inclined surface 230a. And an R-shaped surface 230b following the R-shaped surface 230b.
In the second stacking tray 230, when the inclined surface 230a is fitted into the back surface of the first stacking tray 220 to form the stacking tray portion T, a part of the R-shaped surface 230b and the flat surface 230c are exposed. Then, the stacking surface 220a of the first stacking tray 220 and the stacking surface of the stacking tray portion T are formed (see FIG. 7B).

The second stacking tray 230 has a shaft portion 231a serving as a rotation fulcrum 231 on one end side that is upstream in the paper discharge direction, and is rotatably supported by the main body of the post-processing apparatus 200.
As a result, a second cam surface 252 of a cam member 250, which will be described later, is rotated in contact with the side portion 230d of the second stacking tray 230, thereby being inclined at a predetermined angle so as to lift the downstream side in the paper discharge direction. Be placed.

  An extension tray 230A is slidably provided at the other end of the second stacking tray 230 on the downstream side in the paper discharge direction (see FIGS. 3 and 7), and the size of the paper P to be discharged (paper length). ) To expand the stacking surface.

As shown in FIG. 7, the cam member 250 as an elevating means includes a first cam surface 251 and a second cam surface 252 that are integrally formed on the same axis, and is rotationally controlled via a motor M (not shown). The first cam surface 251 has an eccentric radius r 1 larger than that of the second cam surface 252, and the lifting amount of the first stacking tray 220 is larger than that of the second stacking tray 230.
The cam member 250 is positioned at the center of gravity (see G in FIG. 7B) when the paper P is stacked on the first stacking tray 220 and the second stacking tray 230. It arrange | positions so that the tray 230 may be contacted, and the transmission efficiency of torque is improved.

  As shown in FIG. 6, the third stacking tray 240 is rotatable to the front end side of the first link unit 241 that is entirely H-shaped and has a stacking surface 241 a and the first link unit 241 that is downstream in the paper discharge direction. The second link part 242 (only one side is shown) connected to the first link part 241 and the extension part 243 (only one side is shown) rotatably supported on the distal end side of the first link part 241.

The first link portion 241 has a shaft portion 241b serving as a rotation fulcrum on one end side that is upstream in the paper discharge direction, and a receiving portion 220c on one end side that is upstream in the paper discharge direction of the first stacking tray 220 (see FIG. 4)) and is rotatably supported. The second link portion 242 is rotatably supported by a rotation fulcrum 242b at a receiving portion 230c (see FIG. 5) on the other end side, one end side of which is on the downstream side in the sheet discharge direction of the second stacking tray 230, and on the other end side. Has a shaft portion 242c and is rotatably connected to the other end side of the first link portion 241.
The extension part 243 is supported from the back surface by the other end part 242a of the second link part 242, and is supported so as to be rotatable in a direction crossing the sheet discharge direction, thereby forming a part of the stacking surface.

  In the third stacking tray 240 configured as described above, the first stacking tray 220 and the second stacking tray 230 configure a pantograph mechanism (see virtual lines c1 and c2 in FIG. 7A), and When the first stacking tray 220 and the second stacking tray 230 are simultaneously rotated, the stacking surface 241a of the first link unit 241 forms the stacking surface of the stacking tray unit T by translating in the direction intersecting the sheet discharge direction. To do.

(3) Operation and Action of Stacking Tray Unit FIG. 8 is a schematic diagram illustrating the formation of a stacking surface by the first stacking tray 220, the second stacking tray 230, and the third stacking tray 240 in the stacking tray unit T. Hereinafter, the operation of the stacking tray portion T of the post-processing apparatus 200 and the reception of the paper P will be described with reference to the drawings.

  As shown in FIG. 8C, the stacking tray portion T of the post-processing apparatus 200 can stack the maximum amount of sheets P discharged from the discharge roller 211 on the upstream side in the sheet discharge direction, as shown in FIG. The second stacking tray 230 is in a state where the downstream side in the sheet discharge direction is substantially the same height as the downstream side in the sheet discharge direction of the first stacking tray 220.

  At the position where the maximum amount of sheets P can be stacked, the stacking surface of the stacking tray unit T includes the stacking surface 220a of the first stacking tray 220, the R-shaped surface 230b and the flat surface 230c of the second stacking tray 230, and the third stacking. The stacking surface 241a of the tray 240 is substantially the same surface and is inclined at a predetermined angle. In this state, the stacked paper P is stored in a state where the rear end is abutted against the wall surface 212 on the downstream side in the paper discharge direction and the rear end is aligned.

When the post-processing device 200 receives and stacks the paper P discharged from the discharge roller 211, as shown in FIG. 7A, the first processing tray 220 and the first stacking tray 220 along the paper P discharge direction are arranged. The second stacking tray 230 is received at a position (see arrows R1 and R2 in FIG. 8A) lifted about the respective rotation fulcrums 221 and 231.
Thereafter, as the number of stored sheets increases, the first stacking tray 220 and the second stacking tray 230 descend as shown in FIG. 8B (see arrows R3 and R4 in FIG. 8B). Loading while accepting P.

  As shown in FIG. 8A, when the cam member 250 lifts the upstream side of the first stacking tray 220 in the paper discharge direction and the downstream side of the second stacking tray 230 in the paper discharge direction, the first stacking tray 220 and The second stacking tray 230 forms a pantograph mechanism (see virtual lines c1 and c2 in FIG. 7A) so that the first link portion 241 of the third stacking tray 240 is lifted from the first stacking tray 220. To form a loading surface having an inclination angle substantially the same as the inclination angle Θ at the position where the maximum amount can be loaded (see FIG. 8C).

  As shown in FIG. 8B, when the stacking tray portion T is lowered according to the number of sheets accommodated, the first link portion 241 of the third stacking tray 240 moves so as to approach the first stacking tray 220. Then, a loading surface having an inclination angle substantially the same as the inclination angle Θ at the position where the maximum amount can be loaded (see FIG. 8C) is formed.

  As a result, the inclination angle of the stacking tray portion T becomes substantially constant regardless of the number of sheets accommodated, and even when the sheet bundle PB or the sheet P is discharged at a high speed by increasing the discharge speed of the discharge roller 211, the stacking surface 241a is self-weighted. The top is slid down toward the wall surface 212 and stored in a state where the rear end is well aligned. In particular, even a thin paper having a small paper basis weight is reliably discharged from the discharge roller 211, and the occurrence of the rear end remaining is suppressed.

  According to the post-processing device 200 according to the present embodiment, the stacking tray unit T is set in a predetermined manner while suppressing an increase in the height of the in-cylinder space S formed between the image forming unit 2 and the image reading unit 3. It can be arranged inclined at an angle.

DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus 2 ... Image forming part 3 ... Image reading part 10 ... Control apparatus 20 ... Paper feeding apparatus 30 ... Photoconductor unit 40 ... Developing apparatus 50 ... Transfer device 60 ... Fixing device 70 ... Operation information section
DESCRIPTION OF SYMBOLS 100 ... Post 200 ... Post-processing apparatus 210 ... Main-body part 211 ... Discharge roller 212 ... Wall part 220 ... 1st stacking tray 230 ... 2nd stacking tray 240 ..Third stacking tray 241 ... first link portion 242 ... second link portion 243 ... extension portion 250 ... cam member 251 ... first cam surface 252 ... second cam Surface S ... Space in the trunk

Claims (6)

A first stacking tray for stacking sheets to be discharged that can be rotated so as to lift the upstream side in the paper discharge direction with the downstream side in the paper discharge direction as a first rotation fulcrum;
A second stacking tray for stacking sheets to be rotated and discharged so as to lift the downstream side in the paper discharge direction with the upstream side in the paper discharge direction as a second rotation fulcrum;
Elevating means for lifting the first stacking tray and the second stacking tray,
The first stacking tray and the second stacking tray are installed at a predetermined angle so as to lift the downstream side in the paper discharge direction with respect to the upstream side in the paper discharge direction, and the discharged paper is When receiving, the stacking surface formed by the first stacking tray and the second stacking tray rotates at the same time and translates in a direction intersecting with the sheet discharge direction while being inclined at the predetermined angle.
A post-processing device. The elevating means includes a first cam surface that contacts the first stacking tray at a center of gravity when the sheets are stacked on the first stacking tray and the second stacking tray, and the second stacking tray. The second cam surface that contacts the tray is a cam means formed coaxially, and the first stacking tray and the second stacking tray are rotated simultaneously.
The post-processing apparatus according to claim 1. A third stacking tray for stacking the discharged sheets that can be translated in a direction intersecting the sheet discharge direction with respect to the stacking surface formed by the first stacking tray and the second stacking tray is further provided. ,
The post-processing apparatus according to claim 1. The third stacking tray has one end rotatably supported at one end upstream of the first stacking tray in the sheet discharge direction, and one end downstream of the second stacking tray in the sheet discharge direction. A second link portion rotatably supported on the side of the first link tray and a second link portion rotatably connected to each other end, and the first stack tray and the second stack tray constitute a pantograph mechanism to form the first link tray. The stacking tray and the second stacking tray rotate at the same time and translate in a direction intersecting the sheet discharge direction, and the first link portion forms a stacking surface;
The post-processing apparatus according to claim 3. The first link portion has an extension portion having a rotation fulcrum on the other end side, and the extension portion is supported from the back surface on the other end side of the second link portion and rotates in a direction intersecting with the paper discharge direction. Forming a loading surface that can be supported,
The post-processing apparatus according to claim 3 or 4, characterized by the above. The post-processing according to any one of claims 1 to 5, wherein an in-cylinder space is formed between the apparatus housing and the image reading unit, and post-processing is performed on a sheet on which an image is recorded in the in-cylinder space. Equipped with processing equipment,
An image forming apparatus.

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