JP4820639B2 - Sheet conveying apparatus, sheet processing apparatus, and image forming apparatus - Google Patents

Description

  The present invention relates to a sheet conveying apparatus that acts on an end portion of a sheet member to convey a sheet member or a bundle of sheet members, a sheet processing apparatus including the sheet conveying apparatus, and an image including the sheet conveying apparatus or the sheet processing apparatus. The present invention relates to a forming apparatus.

  As this type of technology, for example, the inventions described in Patent Documents 1 to 3 are known. Among these, Patent Document 1 discloses a storage unit that stores discharged recording paper, a post-processing unit that performs post-processing on the recording paper stored in the storage unit, and an end of the recording paper on the storage unit. And a discharge belt for pushing out the recording paper from the storage means, and a recording paper which is disposed downstream of the discharge belt in the direction of pushing out the recording paper and which is discharged from the discharge belt. In a recording paper processing apparatus having a discharge roller for discharging, a bundle of recording paper bound by the post-processing means is curved in front of the discharge roller, and the speed V1 of the discharge belt and the tangential speed V2 of the discharge roller Is described as V1> V2.

  Japanese Patent Application Laid-Open No. 2004-228688 discloses a conveyance unit that conveys a sheet-like medium received from an image forming apparatus, a unit that aligns and staples a plurality of sheet-like media sequentially conveyed by the conveyance unit, and the conveyance unit. A sheet-like medium conveyed by the sheet and a sheet-like medium bundle that is stapled by the staple means, a stacking means that loads the sheet-like medium discharged by the discharge means, and a sheet-like medium bundle that is discharged onto the stacking means. After the sheet-like medium provided with return means that can be brought into and out of contact with the sheet-like medium and is brought into contact with the standing wall by being fed in a direction toward the standing wall while in contact with the sheet-like medium immediately after discharge. In the processing apparatus, the sheet-like medium discharged from the discharge unit is a sheet-like medium bundle that is stapled by the stipple unit. Kiniwa, the control to the invention are described so as to maintain the state in which the return means is spaced from the upper surface of the sheet-like medium bundle.

Furthermore, Patent Document 3 discloses that the return means can be displaced from an arbitrary home position between a presser / return position that can catch the trailing edge of the discharged paper, and the sheet-like medium is discharged from the discharge means so as to be sorted by the sorting means. In this case, before the leading end portion of the discharged sheet-like medium being discharged comes into contact with the upper surface of the already loaded sheet-like medium already stacked on the stacking means, the return means is brought to the pressing / returning position. The held sheet-like medium is positioned and held in a fixed position by the pressing operation, and then the sorting means is driven and sorted before the discharged sheet-like medium falls on the loading means, and the discharged sheet-like medium After the medium has fallen on the stacking means, the return sheet causes the discharge sheet-like medium to abut against the standing wall by the return operation, and then the alignment means Invention to align the sheet-like medium is described by example operation.
Patent Registration No. 3228834 JP 2003-2510 A JP 2003-2513 A

  By the way, Patent Document 1 describes a belt with a claw that conveys a sheet bundle to a paper discharge tray. No consideration is given to the action of the claw belt on a sheet member on the paper discharge tray. Accordingly, the sheet member on the sheet discharge tray may move due to the pushing action of the sheet members that are sequentially discharged, and it is difficult to maintain good stackability.

  Further, Patent Documents 2 and 3 describe a return member that moves and abuts a sheet member that has been discharged onto a discharge tray. These return members include dedicated components and a drive system. Yes. That is, it has a different structure from the drive system such as a claw belt provided in the binding processing tray existing upstream of the discharge tray, and increases the number of parts, the cost, the machine weight, and the electrical equipment. This leads to an increase in power consumption accompanying an increase in parts.

  That is, the conventional technique has the following problems.

(1) When the sheet members are sequentially discharged onto the sheet members discharged on the discharge tray in this way, the sheet member being discharged pushes the previous sheet member that has already been discharged, and moves the sheet member. There are things to do. This is because the sheet member absorbs moisture due to surface friction of the sheet member, cutting burrs on the end surface of the sheet member, or a high humidity environment, and the surface friction temporarily increases. In addition, when a dedicated component that holds the vicinity of the rear end of the sheet member on the sheet discharge tray is mounted, the alignment can be maintained, but the number of parts, the cost is increased, the machine weight is increased, and the electrical equipment is This leads to an increase in power consumption accompanying an increase in parts.

(2) When the sheet member or the bundle thereof is moved to the sheet discharge tray and the sheet member or the bundle thereof is a plurality of copies, the sheet member is During movement, there is no restriction on the front sheet member or its bundle on the paper discharge tray, and it becomes free and it becomes difficult to maintain good stackability of the paper discharge tray.

(3) If one moving member moves the sheet member onto the sheet discharge tray and remains in that length, the other moving member moves the next sheet member bundle onto the sheet discharge tray. Occasionally, it becomes an obstacle and causes problems such as a stack failure and damage to the sheet member.

(4) When the sheet member or the bundle thereof is moved to the paper discharge tray, if the drive is not performed with good balance with respect to the position of the center of gravity of the sheet, a conveyance failure such as skew is caused. If the sheet is stacked on the sheet discharge tray in this state, the stack becomes defective, and a part of the sheet member comes into contact with or remains on the conveying member, causing damage or jamming of the sheet member or a bundle thereof. .

  The present invention has been made in view of the situation of the prior art as described above, and an object of the present invention is to prevent a stack failure caused by movement of a sheet bundle without causing an increase in the number of parts and an increase in power consumption. It is to ensure stackability.

To achieve the above object, the first means, the sheet conveying apparatus provided with a moving means for moving the bundle of aligned sheet member or sheet members to the sheet stacking means side, said moving means is provided with a plurality, respectively Independently driven, after the sheet member or the bundle of sheet members is moved onto the sheet stacking means, the sheet member or the bundle of sheet members is pressed from above.

The second means is characterized in that, in the first means, the moving means has a rocking fulcrum and expands and contracts during the rocking process.

The third means is characterized in that, in the second means, the moving means presses the sheet member or a bundle of sheet members when contracted.

A fourth means is characterized in that, in the first means, the driving is performed by a single driving source.

According to a fifth means, in the first means, the portion of the plurality of moving means that comes into contact with the sheet member or the bundle of sheet members is parallel to the transport direction and the sheet member or the bundle of sheet members is It is characterized by being set at equidistant positions from the line on both sides of the line passing through the center of gravity.

A sixth means is any one of the first to fifth means, wherein the moving means includes a main frame, a hook portion attached to the main frame movably along the longitudinal direction of the main frame, It comprises a discharge link provided with a biasing means that elastically biases the hook part in the contracting direction at all times, a rail that defines the locus of the hook part, and a drive means that swings the discharge link. .

The seventh means includes a matching member for stacking a transport upstream portion of the discharged sheet member and a sheet member discharged onto the discharge tray in the first to sixth means on the alignment member side. Return means for conveying the sheet to the sheet, and the sheet stacking means comprises a sheet discharge tray for stacking a conveyance downstream portion of the discharged sheet member.

The eighth means is characterized in that the sheet processing apparatus includes the sheet conveying apparatus according to any one of the first to seventh means.

A ninth means is characterized in that the image forming apparatus includes a sheet conveying apparatus according to any one of the first to seventh means.

According to the present invention, it is possible to prevent without increasing the growth and the power consumption of the stack defective parts due to the movement of the sheet over sheet bundle, to ensure good stackability.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the drawings.
In addition, in each following embodiment, the same referential mark is attached | subjected to each equivalent part, and the overlapping description is abbreviate | omitted suitably.

<First Embodiment>
FIG. 1 is a diagram showing a system configuration of an image forming apparatus according to a first embodiment of the present invention. This system includes an image forming apparatus 1 main body and a sheet member post-processing apparatus (hereinafter referred to as a sheet processing apparatus) 2. It is configured. The sheet processing apparatus 2 is attached to the side surface of the main body of the image forming apparatus 1, and an image-formed sheet member, here, paper is carried into the sheet processing apparatus 2 from a paper discharge port on the side surface of the main body of the image forming apparatus 1, and predetermined processing Is given.

  FIG. 2 is a diagram showing a schematic configuration of the sheet processing apparatus 2 according to the present embodiment. In FIG. 1, the sheet processing apparatus 2 basically includes an entrance roller 3, a paper discharge roller 4, a paper discharge tray 5, a rear end fence 6, a return roller 7, and a pair of discharge links 8. The entrance roller 3 receives the sheet member discharged from the image forming apparatus 1, and the sheet discharge roller 4 discharges the sheet member carried from the entrance roller 3 to the sheet discharge tray 5. The rear end fence 6 includes a stacking surface 6a on which sheets are stacked and an abutting surface 6b provided substantially perpendicular to the stacking surface 6a. The return roller 7 is supported by an arm 7b and a roller 7a for carrying the paper, and can swing with one end of the arm as a swing fulcrum 7c. One end of the discharge link 8 is supported by a rotatable support shaft (rotation center) 8 a that can freely rotate, and the other end of the discharge link 8 is formed as a hook that can press the sheet stacking surface on the paper discharge tray 4. It has become. The entrance roller 3, the paper discharge roller 4, and the roller 7a are each driven by a stepping motor, and the arm 7b is swung by a solenoid. The discharge link 8 is driven to swing by a link mechanism (not shown).

  The sheet processing apparatus configured generally as described above operates as shown in FIGS. That is, as shown in FIG. 3, the sheet member is carried into the sheet processing apparatus 2 from the image forming apparatus 1 by the entrance roller 3. The sheet member is discharged from the discharge roller 4 onto the discharge tray 5 as shown in FIG. At this time, the return roller 7 is at a position away from the discharge tray 5, that is, at a retracted position. When the sheet member is discharged onto the discharge tray 5 by the discharge roller 4 as shown in FIG. 4, the rear end of the sheet member leaves the nip of the discharge roller 4 as shown in FIG. Is dropped over the paper discharge tray 5 or between the paper discharge tray 5 and the stacking surface 6 a of the rear end fence 6. FIG. 5 illustrates the latter state, but when the conveying force of the paper discharge roller 4 is strong, the former state is obtained.

  The return roller 7 is driven by the solenoid from the state shown in FIG. 5, the roller 7a comes into contact with the sheet member on the discharge tray 5 as shown in FIG. 6, and the sheet member is brought into contact with the rear end fence 6 by the rotation of the roller 7a. It conveys to the surface 6b side. Then, as shown in FIG. 7, the rear end of the sheet member is brought into contact with the abutting surface 6b of the rear end fence 6 to align the rear end of the sheet member. When the sheet member abuts against the abutting surface 6b, the return roller 7 is separated from the discharge tray 5 again, that is, returns to the retracted position. These operations are repeated for the number of sheets of one job, and the sheet bundle STB is stacked on the stacking surface 6a of the rear end fence 6.

  Thus, when the sheet members ST for one job are stacked on the stacking surface 6a as the sheet bundle STB, the discharge link 8 starts to move from the rear side of the abutting surface 6b of the rear end fence 6 as shown in FIG. Then, the rear end of the sheet bundle STB is pushed back onto the discharge tray 5. FIG. 9 is a diagram showing the state at this time. The discharge link 8 moves the entire sheet bundle away from the rear end fence 6 and moves it onto the paper discharge tray 5, and the hook-shaped pressing portion 8 b of the discharge link 8 remains as it is. The state where the upper surface of the rear end of the bundle is pressed is shown. The link mechanism (not shown) is such that the path of the pressing portion 8b of the discharge link 8 can press the upper surface of the sheet bundle STB against the lower surface of the pressing portion 8b after the sheet bundle STB is pushed back onto the sheet discharge tray 5. The discharge link 8 is driven by the locus.

  According to this embodiment, when the sheet members are sequentially discharged onto the sheet members discharged onto the discharge tray 5, the previous sheet member that has already been discharged is pressed by the pressing portion 8b. Therefore, it is possible to prevent the sheet member being discharged from pushing out the already discharged sheet member, thereby obtaining a good stacking property. In addition, it is not necessary to add a dedicated component for holding down the sheet member ST on the paper discharge tray 5, and the number of parts is increased, the cost is increased, the machine weight is increased, and the power consumption is increased due to an increase in electrical parts. Will not be invited.

<Second Embodiment>
FIG. 10 is a diagram illustrating a schematic configuration of the sheet processing apparatus 2 according to the present embodiment. In this embodiment, instead of the discharge link 8 in the first embodiment, a pair of extendable discharge links are provided in parallel on the same rotation shaft, and the swing locus is defined by the rail 22. The pair of discharge links according to this embodiment includes a discharge link front 21 and a discharge link back 25. The front and back are based on the arrangement viewed from the front side of the sheet processing apparatus 2. The rail 22 is provided with a cam, a recess and the like for regulating the length of the discharge links 21 and 25 during operation. Although these are provided in other structural members, only the function of the rail 22 is demonstrated in this embodiment.

  FIG. 11 is a diagram showing details of the front 21 of the discharge link. Since the configuration of the discharge link back 25 is the same, only the front 21 of the discharge link will be described. The front 21 of the discharge link includes a main frame 21a and a hook portion 21b. The hook portion 21b is inserted into a cylindrical hole portion of the main frame 21a and is movable in the length direction. A tension spring 21c is hung between the main frame 21a and the hook portion 21b, and the hook portion 21b is always elastically biased toward the main frame 21a side. A boss 21d protrudes from the hook portion 21b and is loosely fitted in the groove portion of the rail 22. The lower end of the main frame 21a is swingably supported by a rotation support shaft (rotation center) 21e, and the side surface of the hook portion 21b is set so as to be able to push the rear end of the sheet bundle STB. The boss 21d is always a rail. 22 is fitted.

  12 to 19 are diagrams illustrating the operation of the sheet processing apparatus 2 according to the present embodiment. In these drawings, the tension spring 21c is omitted for simplification. FIG. 12 shows the time when the operation is started, and both the discharge link front 21 and the discharge link back 25 are waiting in the vicinity of the rear end fence 6, in other words, behind the abutment surface 6 b of the rear end fence 6. At this time, the hook part 21b is pulled by the rail 22, and the front 21 of the discharge link is in a long state.

  FIG. 13 shows a state in which a plurality of sheet members ST are discharged one by one, placed on the stacking surface 6a of the rear end fence 6 as a sheet bundle STB, and the rear end abuts against the abutting surface 6b. 4 to 7 in the embodiment is in a state in which one job is completed. As shown in FIG. 14, the front side 21 of the discharge link is driven from the state of FIG. 13, and the front side 21 of the discharge link starts to move from the vicinity of the abutment surface 6b of the rear end fence 6 as in FIG. Press the rear end of the bundle STB.

  When the operation of FIG. 14 is continued, as shown in FIG. 15, the sheet bundle STB pushes the entire sheet bundle STB from the rear end fence 6 as shown in FIG. Move to. At this time, the hook portion 21b is pulled by the pull spring 21c by the guide of the rail 22 and contracts, and is placed on the rear end of the sheet bundle STB and presses the rear end of the sheet bundle STB. At this time, the front 21 of the discharge link is short.

  FIG. 16 shows that the sheet bundle STB is stacked on the stacking surface 6a of the rear end fence 6 as shown in FIGS. Indicates a moving state. At this time, the sheet bundle STB of the previous job is held on the discharge tray 5 at the front end 21 by the discharge link front 21. Therefore, even if the sheet bundle STB of the next job moves on the sheet bundle STB of the previous job, the sheet bundle STB of the previous job does not move or shift.

  FIG. 17 shows a state in which the discharge link depth 25 has finished moving the sheet bundle STB as in FIG. The sheet bundle STB is stacked on the front side of the discharge link 21 holding the sheet bundle STB of the previous job on the discharge tray 5, and the discharge link back 25 holds the sheet bundle STB from above. Next, the front 21 of the discharge link returns to the vicinity of the rear end fence 6 in preparation for the next job as shown in FIG. At this time, the front side 21 of the discharge link which has been shortened by the guide of the rail 22 is extended while moving, and finally becomes a long state (initial state) shown in FIG. Further, as the front 21 of the discharge link is retracted from the discharge tray 5, the discharge link back 25 moves slightly downward (FIG. 17 to FIG. 18), and all the sheet bundles STB on the discharge tray 5 are moved. Hold down. The state at this time is shown in FIG. This state further waits for the next job sheet ST to be loaded. As described above, the front 21 of the discharge link returns to the back side of the rear end fence 6 and is shortened by being guided by the rail 22 and shortened. Is stretched while moving and returns to the initial state.

  In this embodiment, the front 21 of the discharge link is operated and the back 25 of the discharge link is operated next. However, this may be reversed, and the sheet bundle STB is pressed alternately with the front 21 of the discharge link and the back 25 of the discharge link. Operation and extrusion operation may be performed.

  Other parts that are not particularly described are configured in the same manner as the first embodiment and function in the same manner.

  According to the present embodiment, when the sheet member ST of the next job or its bundle STB is moved to the paper discharge tray 5, it is possible to hold the sheet bundle STB of the previous job on the paper discharge tray 5. Deterioration of stackability due to movement of the sheet member ST of the job and its bundle STB can be prevented. Further, after one discharge link 21 moves the sheet bundle STB onto the sheet discharge tray 5, there is no obstacle when the other discharge link 25 moves the next sheet bundle STB onto the sheet discharge tray 5. Therefore, it is possible to move the good sheet member ST and the bundle STB, and it is possible to prevent problems such as a stack failure and damage to the sheet member.

It becomes possible.

<Third Embodiment>
FIG. 20 is a diagram illustrating a schematic configuration of the sheet processing apparatus 2 according to the present embodiment. This embodiment specifically incorporates a drive mechanism for the discharge link with respect to the second embodiment.

  The drive mechanism includes a motor 31, a timing pulley 31a, a gear 31b, a cam plate 34, a one-way clutch engagement timing pulley 32, and the like. These mechanisms are shown by extracting constituent elements in FIG. 20B, which is a view in the direction of arrow A in FIG. In FIG. 20, a motor 31 is a double-axis motor, and a timing pulley 31a is assembled on one end side of a rotating shaft, and a gear 31b is assembled on the other end side.

  A timing pulley 32 with a one-way clutch in which a timing belt 33 is stretched between a timing pulley 31a and a cam plate 34 driven by the timing pulley 32 with a one-way clutch is provided on the front side 21 of the release link. The plate 34 is provided with a small boss 35 near the circumference and a large boss 36 on the central axis. Further, a long hole 21e is added to the hook portion 21b on the front side of the discharge link 21, and a small boss 35 of the cam plate 34 is loosely fitted. The large boss 36 is fitted to the timing pulley 32 with a one-way clutch so as to transmit a driving force only when rotating in a predetermined direction.

  A timing pulley 37 with a gear that meshes with the gear 31b, a timing pulley 37 with a one-way clutch in which a timing belt 33 is stretched between the timing pulley 37 with a gear, and a timing with which this one-way clutch enters A cam plate 34 driven by the pulley 32 is provided. The cam plate 34 is provided with a small boss 35 near the circumference and a large boss 36 on the central axis. A long hole 25e is added to the hook portion 25b of the discharge link back 23, and a small boss 35 of the cam plate 34 is loosely fitted. The large boss 36 is fitted to the one-way clutch engagement timing pulley 32 so as to transmit a driving force only when rotating in a predetermined direction. The front 21 and back 25 of the discharge link have the same configuration except for the driving force transmission mechanism from the motor 31.

  21 to 25 show a series of operations of the two discharge links 21 and 25. FIG. For ease of explanation, the operation of each link in the sheet processing apparatus and the operation of this configuration are illustrated separately.

  FIG. 21 (corresponding to FIG. 14 in the second embodiment) shows the operation when the front side 21 of the discharge link pushes out the sheet bundle STB to the discharge tray side. As shown in FIG. The one-way clutch engaging timing pulley 32 is rotated counterclockwise, and the one-way clutch engages with the large boss 36 of the cam plate 34 to drive the cam plate 34, thereby rotating the cam plate 34 counterclockwise. Accordingly, the small boss 35 of the cam plate 34 moves the discharge link front 21 from the abutment surface 6 b side of the rear end fence 6 to the paper discharge tray 5 side via the hook portion 21 b of the discharge link front 21. Further, on the rear side of the discharge link 25, since the geared timing pulley 31b is inserted from the gear 31b to the driving force transmission system of the timing pulley 37 with the one-way clutch, the rotation direction is opposite to that of the front side of the discharge link 21. Accordingly, at this time, the one-way clutch engagement timing pulley 32 for the release link back 25 rotates clockwise as shown in FIG. 21 (c), and the one-way clutch idles to the cam plate 34 for the discharge link back 25. The drive is cut off and the discharge link depth 25 is stationary.

  FIG. 22 (corresponding to FIG. 15 in the second embodiment) is a diagram showing a state where the front 21 of the discharge link completes the movement of the sheet onto the sheet discharge tray 5 and the motor 31 is stopped. At this time, as shown in FIG. 22A, the rear end of the sheet bundle STB is pressed from the upper surface as shown in FIG. 22A, and as shown in FIG. 22B, the hook portion 21b of the discharge link 21 is in a contracted state. The discharge link depth 25 is in the most extended state as shown in FIG.

  In FIG. 23 (corresponding to FIG. 16 in the second embodiment), the motor 31 rotates in the reverse direction and rotates in the clockwise direction, and the discharge link back 25 is moved from the abutment surface 6b side of the rear end fence 6 to the discharge tray by the same operation. FIG. 6 is a diagram illustrating an operation when moving to 5; At this time, as shown in FIG. 23 (c), the discharge link depth 25 moves to the sheet discharge tray 5, but as shown in FIG. 23 (b), the one-way clutch engagement timing pulley 32 for the discharge link front 21 is clockwise. The one-way clutch is idled, the drive to the cam plate 34 for the discharge link front 21 is cut off, and the discharge link front 21 is stationary. That is, the front 21 of the discharge link presses the rear end portion of the sheet bundle STB.

  FIG. 24 (corresponding to FIG. 17 in the second embodiment) is a diagram showing a state where the discharge link depth 25 has completed the movement of the sheet bundle STB onto the paper discharge tray 5 and the motor 31 has stopped. At this time, as shown in FIG. 24A, the discharge link back 25 holds the rear end of the sheet bundle STB from the upper surface.

  In FIG. 25 (corresponding to FIG. 18 in the second embodiment), after the state of FIG. 24, the motor 31 rotates counterclockwise, and the cam plate 34 on the front side of the discharge link rotates accordingly. A state when the near side 21 of the link is moved to the abutting surface 6b side of the rear end fence 6 is shown. In this state, the discharge link back 25 keeps pressing the rear end of the sheet bundle STB.

By repeating forward and reverse rotation of the motor 31 in this way,
(1) Forward rotation of the motor, paper movement by the front 21 of the discharge link (2) Reverse rotation of the motor, movement of the paper by the rear 25 of the discharge link (3) Forward rotation of the motor, front 21 of the discharge link toward the abutment surface 6b of the rear end fence 6 Movement (4) Forward rotation of the motor, paper movement by the front 21 of the discharge link (5) Reverse rotation of the motor, movement of the discharge link back 25 toward the abutment surface 6b side of the rear end fence 6 (6) Paper by reverse rotation of the motor, discharge link back 25 By repeating the six movement operations, the sheet bundle STB of the previous job is pressed by one discharge link, and the next sheet bundle STB is pushed out by the other discharge link while maintaining this state. .

  Other parts not specifically described are configured in the same manner as the first and second embodiments described above and function in the same manner.

  According to this embodiment, the operation of pressing the sheet bundle STB of the previous job with one discharge link and pushing out the next sheet bundle STB with the other discharge link while maintaining this state is automatically performed in the copy work and the printout work. Therefore, workability can be improved. At this time, since it is not necessary to provide a driving source such as a motor for each of the plurality of moving members (release links), it is possible to prevent an increase in the number of parts, an increase in cost, and an increase in machine weight.

<Fourth Embodiment>
FIG. 26 is a diagram showing a schematic configuration of the sheet processing apparatus 2 according to the present embodiment. In this embodiment, the front side of the discharge link and the inner side 41, 42 are used instead of the rear side 21 and 25 in the third embodiment. The discharge link outer 41 and the discharge link inner 42 are provided at positions distributed with respect to the conveyance center of the sheet member ST, and, like the discharge links 21 and 25, push the rear end of the sheet bundle STB to hold the upper surface. Is provided. In this embodiment, the third embodiment pushes out the sheet bundle STB with one discharge link 21 and 25, more specifically, with one hook portion 21b and 25b, and the discharge link 41 on each of the outer and inner discharge links 41 and 25. A pair of 42 is provided, and the sheet bundle STB is pushed and pushed out at two points. As a result, the pressing and pushing operation of the sheet bundle STB is executed at an equidistant position with respect to the conveyance center of the sheet member ST.

  Other parts that are not particularly described are configured in the same manner as the above-described third embodiment and function in the same manner.

  According to the present embodiment, when the sheet member ST or its bundle STB is moved to the sheet discharge tray 5, it is possible to drive the center of gravity of the sheet member ST in a well-balanced manner, and to prevent conveyance failure such as skew. Further, stack failure is prevented by being stacked on the paper discharge tray 5 in a skew state, and further, a part of the sheet member ST hits the conveying member due to the skew, or the sheet member ST or its bundle STB is damaged due to the skew or jammed. Can be prevented.

1 is a diagram illustrating a system configuration of an image forming apparatus according to a first embodiment of the present invention. 1 is a diagram illustrating a schematic configuration of a sheet processing apparatus according to a first embodiment. It is a figure which shows the operation | movement immediately after sheet member carrying in in 1st Embodiment. It is a figure which shows the operation | movement at the time of discharge of the sheet | seat member in 1st Embodiment. FIG. 6 is a diagram illustrating a state when sheet discharge of a sheet member is completed in the first embodiment. It is a figure which shows the return operation | movement of the sheet | seat member of the sheet | seat member in 1st Embodiment. It is a figure which shows the state immediately after completion | finish of alignment operation | movement of the rear end of the sheet | seat member in 1st Embodiment. It is a figure which shows the state immediately after the start of the movement operation | movement of the sheet | seat bundle in 1st Embodiment. 6 illustrates a state at the end of the movement of the sheet bundle onto the paper discharge tray in the first embodiment. It is a figure which shows schematic structure of the sheet processing apparatus which concerns on 2nd Embodiment. It is a figure which shows the structure of the discharge | release link in 2nd Embodiment. It is a figure which shows the initial state of the discharge | release link in 2nd Embodiment. FIG. 10 is a diagram illustrating a state immediately before the start of a sheet bundle movement operation in the second embodiment. It is a figure which shows the state at the time of the movement before the discharge | release link of the sheet bundle in 2nd Embodiment. FIG. 10 is a diagram illustrating a state at the end of the movement of the sheet bundle onto the paper discharge tray before the discharge link of the sheet bundle according to the second embodiment. FIG. 10 is a diagram illustrating a state in which another sheet bundle is moved by the depth of the discharge link while the sheet bundle is pressed in front of the discharge link in the second embodiment. FIG. 10 is a diagram illustrating a state where the movement on the sheet discharge tray by the depth of the discharge link of the sheet bundle is completed and the sheet bundle is pressed before and behind the discharge link in the second embodiment. It is a figure which shows the process in which the front of a discharge link returns to an initial state in the state which pressed down the sheet | seat bundle in the back of the discharge link in 2nd Embodiment. It is a figure which shows the state which the discharge link front returned to the initial state in the state which pressed the sheet | seat bundle in the back of the discharge link in 2nd Embodiment. It is a figure which shows schematic structure and the drive mechanism of the sheet processing apparatus which concerns on 3rd Embodiment. It is a figure which shows operation | movement of the drive mechanism in the state of FIG. FIG. 16 is a diagram illustrating the operation of the drive mechanism in the state of FIG. 15. It is a figure which shows operation | movement of the drive mechanism in the state of FIG. It is a figure which shows operation | movement of the drive mechanism in the state of FIG. It is a figure which shows operation | movement of the drive mechanism in the state of FIG. It is a figure which shows schematic structure of the sheet processing apparatus which concerns on 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2 Sheet processing apparatus (sheet member post-processing apparatus)
5 discharge tray 6 rear end fence 6a stacking surface 6b abutting surface 7 return roller 8 discharge link 21 discharge link front 21a main frame 21b hook portion 21c tension spring 21d boss 22 rail 25 discharge link back 25b hook portion 31 motor 31a timing pulley 31b Gear 32 Timing pulley with one-way clutch 33 Timing belt 34 Cam plate 37 Timing pulley with gear ST Sheet member STB Sheet bundle

Claims (9)

In the sheet conveying apparatus provided with moving means for moving the aligned sheet member or a bundle of sheet members to the sheet stacking means side,
A plurality of the moving means are provided and driven independently, and after the sheet member or the bundle of sheet members is moved onto the sheet stacking means, the sheet member or the bundle of sheet members is pressed from the upper surface. A sheet conveying apparatus characterized by the above. 2. A sheet conveying apparatus according to claim 1, wherein said moving means has a swinging fulcrum and expands and contracts during the swinging process . The sheet conveying apparatus according to claim 2, wherein the moving unit presses the sheet member or the bundle of sheet members when contracted . The driving sheet conveying apparatus according to claim 1, wherein a carried out by a single driving source. The portions of the plurality of moving means that are in contact with the sheet member or the bundle of sheet members are parallel to the conveying direction and on both sides of the line passing through the center of gravity of the sheet member or the bundle of sheet members, from the line. The sheet conveying apparatus according to claim 1 , wherein the sheet conveying apparatus is set at equidistant positions . The moving means includes a main frame, a hook portion attached to the main frame so as to be movable along the longitudinal direction of the main frame, and an urging means for elastically urging the hook portion in a contracting direction at all times. and release link, a rail defining the trajectory of the hook portion, the sheet conveying device according to any one of claims 1 to 5, characterized in that a drive means for oscillating the release link. An alignment member for stacking the transport upstream portion of the discharged sheet member;
Return means for conveying the sheet member discharged onto the discharge tray to the alignment member side;
7. The sheet conveying apparatus according to claim 1 , wherein the sheet stacking unit includes a sheet discharge tray for stacking a conveyance downstream portion of the discharged sheet member . A sheet processing apparatus comprising the sheet conveying apparatus according to claim 1 . An image forming apparatus characterized in that it comprises a sheet conveying device according to any one of claims 1 to 7.

Images