JP3916132B2 - Sheet post-processing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet post-processing apparatus that is provided in an image forming apparatus and stacks sheets at a sheet stack position after aligning sheets in the vertical and horizontal directions on the alignment position.
[0002]
[Prior art]
Japanese Patent Laid-Open No. 10-305961 uses a discharge arm as a discharge means for discharging a sheet onto a movable discharge tray, and the discharge arm is swung through a disk or a crank by driving a drive source. A sheet post-processing apparatus that pushes is disclosed.
[0003]
Japanese Patent Publication No. 8-9451 uses a contact plate (pushing plate) as a discharge means for discharging a sheet onto a storage tray, and this contact plate is linearly moved by a motor via a roller or a pinion. A sheet post-processing apparatus that pushes a sheet is disclosed.
[0004]
Japanese Examined Patent Publication No. 8-5260 discloses a finishing apparatus that uses an extrusion assembly having an elongated finger and linearly moves the extrusion assembly via a cam or lever by a motor to push a copy sheet.
[0005]
[Problems to be solved by the invention]
However, the prior art has a drive means such as a motor dedicated to the discharge means for driving the discharge means for discharging the aligned sheets to the stack tray. For this reason, the machine has become large and expensive.
[0006]
SUMMARY OF THE INVENTION Accordingly, a first object of the present invention is to provide a sheet post-processing apparatus that does not require a dedicated driving means for driving the discharging means for discharging aligned sheets to the sheet stack position, and can be reduced in size and cost. There is to do.
[0007]
The prior art requires a sensor for detecting the position of the discharge means for stacking the aligned sheets, and is an expensive machine.
[0008]
Accordingly, a second object of the present invention is to provide a sheet post-processing apparatus that does not require a sensor for detecting the position of the discharging means and can further reduce the cost.
[0009]
In the prior art, expensive electromagnetic clutches for clutch control and stop pawl control using solenoids have been performed. For this reason, the machine has become large and expensive.
[0010]
Accordingly, a third object of the present invention is to provide a sheet post-processing apparatus that can be reduced in size and cost with a simple clutch structure.
[0011]
The prior art has a complicated mechanism for driving the discharge means for discharging the aligned sheets to the stack tray.
[0012]
Accordingly, a fourth object of the present invention is to provide a sheet post-processing apparatus that has a simple mechanism for driving the discharge means and can be further reduced in size and cost.
[0013]
[Means for Solving the Problems]
  Therefore, the present invention aims to achieve the first object.
  In a sheet post-processing apparatus that receives a sheet from an image forming apparatus and discharges the sheet as it is to a sheet stack position after post-processing or without post-processing,
  A driving cam such as a tapping roller driving cam driven by a driving device;
  A discharge roller drive shaft that is rotated by the drive cam, a folder that is rotated together with the discharge roller drive shaft, and a discharge roller that is held by the folder and discharges a sheet that is not post-processed to the sheet stack position;
  A jogger drive shaft that is rotated by the drive cam, an alignment tray such as a bottom plate that is rotated together with the jogger drive shaft and on which a sheet for alignment is placed;
  An alignment member drive shaft such as a tapping roller drive shaft rotated by the drive cam, a second folder rotated together with the alignment member drive shaft, and a sheet on the alignment tray held by the second folder Alignment members such as tapping rollers that perform alignment,
  A discharge unit drive shaft such as a discharge lever drive shaft that is rotated by the drive cam via a clutch device, and a sheet stack that is driven by rotation of the discharge unit drive shaft and that has been post-processed from above the alignment tray. Discharging means for discharging to a position;
  It is characterized by having.
[0014]
The invention according to claim 2 is to achieve the second object.
The sheet post-processing apparatus according to claim 1,
The clutch device is a one-rotation clutch.
[0015]
  The invention according to claim 3 is to achieve the third object.
  In the sheet post-processing apparatus according to claim 1 or 2,
  The discharging meansTheThe alignment memberIt operates in synchronization with.
[0016]
  The invention according to claim 4 also achieves the third object,
  In the sheet post-processing apparatus according to claim 3,
  The drive camThe lever member is provided between the clutch device and the lever member,The discharging meansTheThe alignment memberIt operates in synchronization with.
[0017]
  The invention according to claim 5 is to achieve the fourth object.
  In the sheet post-processing apparatus according to any one of claims 1 to 4,
  The discharging means drive shaftBy converting the rotational motion ofBy transmitting to the discharge lever which is the discharge meansA motion conversion mechanism for discharging the post-processed sheet is provided.
[0018]
  The invention according to claim 6 also achieves the fourth object,
  In the sheet post-processing apparatus according to any one of claims 1 to 4,
  The discharging meansIs provided with a belt device having a convex portion for discharging the post-processed sheet.The
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0020]
In FIG. 1A, a sheet is fed from an image forming apparatus (not shown) to the sheet post-processing apparatus 100 of the present invention.
The sheet sent to the sheet post-processing apparatus 100 is detected by a conveyance sensor (not shown), and is conveyed by a conveyance roller (first sheet conveyance unit) 101 in the sheet post-processing apparatus 100. The transport roller 101 transmits a driving force from a transport drive motor (drive source) (not shown) by first drive transmission means such as a drive shaft of the transport roller 101.
[0021]
A conveyance intermediate roller (first sheet conveying means) 102 made of sponge is disposed on the downstream side of the conveyance roller 101 and above the conveyance path, and the pressure is applied to the lower side of the conveyance path facing the conveyance intermediate roller 102. A film 103 is disposed. The sheet is fed by the conveyance intermediate roller 102 and the pressure film 103. The conveyance intermediate roller 102 transmits a driving force from a conveyance drive motor (drive source) (not shown) by first drive transmission means such as a drive shaft of the conveyance intermediate roller 102.
[0022]
A plate-like guide claw 104 as shown in FIG. 10 is arranged downstream of the conveyance intermediate roller 102 and below the conveyance path. The guide claw 104 has a rotation center on the upstream side and is rotatably attached. The guide claw 104 is rotated by a driving device (not shown). In this embodiment, the guide claw 104 is driven by a solenoid.
[0023]
As shown in FIG. 1, a tapping roller 105, which is an alignment member that aligns sheets on the bottom plate (alignment position) 110, is disposed downstream of the guide pawl 104 and above the conveyance path. The tapping roller 105 rotates in the direction opposite to the conveyance roller 101. The hitting roller 105 is attached to the folder 106. The folder 106 is attached to the tapping roller driving shaft 107, and the folder 106 is rotated by the rotation of the tapping roller driving shaft 107, so that the tapping roller 105 attached to the folder 106 advances and retreats with respect to the conveyance path. It has become. As shown in FIG. 1B, two levers 108 are fixed to the other end of the tapping roller driving shaft 107, and an arm portion on one side of the lever 108 is a tapping roller driving cam (alignment member driving) described later. Engaging with a transmission device 109, the driving force from the conveyance drive motor (drive source) is transmitted to the hitting roller 105 (alignment member).
[0024]
A bottom plate 110 facing the tapping roller 105 is disposed on the downstream side of the guide claw 104 and below the conveyance path. The bottom plate 110 serves as an alignment tray (alignment position) for aligning sheets, has a rotation center 110a on the downstream side, and is rotatably mounted. A reference wall 111 for abutting and aligning the sheet is provided at the upstream end of the bottom plate 110. Further, the upstream portion of the bottom plate 110 is configured to enter the lower side of the guide claw 104. The bottom plate 110 is urged by a spring (not shown) in such a direction as to press the upstream portion of the bottom plate 110 against the guide claw 104.
[0025]
Further, the bottom plate 110 has a convex portion 110b that protrudes downward from the rotation center 110a. The protrusion 110b engages with a protrusion 112a of a jogger drive shaft 112, which will be described later, and rotates the bottom plate 110.
[0026]
On the lower side of the bottom plate (alignment position) 110, a discharge lever (second sheet conveying means) that once conveys the sheet to the bottom plate 110 and then discharges the post-processed sheet from the bottom plate 110 to the stack tray (sheet stack position) 119. 151). The release lever 151 is rotatably attached to the lower end side of the lever, and the upper end side of the lever is rotatable to the downstream side in the transport direction. The discharge lever 151 is provided with a long hole (second drive transmission means) 151a. In the vicinity of the discharge lever 151, an eccentric cam (second drive transmission means) 152 having a convex portion 152 a that is eccentric with respect to the center thereof is provided on one end of the drive shaft 153. The eccentric cam 152 and the release lever 151 are configured such that the convex portion 152a of the eccentric cam 152 is slidably fitted into the elongated hole 151a of the release lever 151, so that the rotational movement from the drive source to the eccentric cam 152 is released. This is a motion conversion mechanism that converts the reciprocating rotational motion of the lever 151 to swing and discharges the post-processed sheet.
[0027]
A one-turn clutch (clutch device) 154 as shown in FIG. 5B is attached to the other end of the drive shaft (second drive transmission means) 153 of the eccentric cam 152. The one-rotation clutch 154 is located between the first drive transmission means and the eccentric cam 152 (second drive transmission means). Therefore, the drive force from the conveyance drive motor (drive source) is passed through the first drive transmission means, the one-rotation clutch 154, the eccentric cam 152, etc. (second drive transmission means), and the release lever (second sheet). (Conveying means) 151.
[0028]
As shown in FIG. 5B, a stop pawl (lever member) 155 is provided in the vicinity of the one-rotation clutch 154, and the one-rotation clutch 154 is disconnected and connected by the stop pawl 155.
[0029]
The tapping roller drive cam (alignment member drive transmission device) 109 is in the vicinity of the stop claw (lever member) 155. That is, a stop claw (lever member) 155 is provided between the tapping roller drive cam (alignment member drive transmission device) 109 and the one-rotation clutch (clutch device). The tapping roller driving cam 109 has a convex portion 109a that activates the one-rotation clutch 154 by the stop claw 155. In synchronization with the tapping roller driving cam 109, the convex portion 109a rotates the stop claw and rotates the one-rotation clutch. Operates.
[0030]
As shown in FIG. 1, a discharge roller 113 (first sheet conveying means) is disposed on the downstream side of the tapping roller 105 and the bottom plate (alignment position) 110 and on the upper side of the conveying path. Further, the hitting roller 105 transmits a driving force from a conveyance drive motor (drive source) (not shown) by first drive transmission means such as a driving shaft of the hitting roller 105. The discharge roller 113 is attached to the folder 114 as shown in FIG. The folder 114 is attached to one end of the discharge roller driving shaft 115, and the folder 114 is rotated by the rotation of the discharge roller driving shaft 115, and the discharge roller 113 attached to the folder 114 is moved to the conveyance path. In contrast, it has a structure that advances and retreats. A lever 116 is fixed to the other end of the discharge roller drive shaft 115, and this lever 116 is engaged with a hitting roller drive cam 109 described later to drive the discharge roller 113. Further, as shown in FIG. 1, a driven roller 117 is disposed at a position facing the discharge roller 113.
[0031]
In the vicinity of the tapping roller 105 and the discharge roller (first sheet conveying unit) 113, a tapping roller driving cam (alignment member driving transmission unit) 109 is disposed outside the conveying path. The tapping roller driving cam 109 is driven by a driving device (not shown). The tapping roller driving cam 109 has a cam profile for advancing and retracting the tapping roller 105 and two cam profiles for advancing and retracting the discharge roller (first sheet conveying means) 113. Further, the hitting roller driving cam 109 has a convex portion 109a that operates the single-rotation clutch (clutch device) 154 in synchronization with the hitting roller driving cam 109 as described above (FIG. 5).
[0032]
Further, as shown in FIGS. 9 and 10, a jogger drive shaft 112 that penetrates in the front-rear direction is disposed below the bottom plate 110 near the rotation center 110 a of the bottom plate (alignment position) 110. The jogger driving shaft 112 has a D-shaped cross section that is D-cut to transmit driving to a jogger driving cam 118 described later. The jogger drive shaft 112 has a convex portion 112a for rotating the bottom plate 110 at the approximate center. The jogger drive cam 118 is connected to a tapping roller driving cam (alignment member drive transmission device) 109 by a gear, and is configured to rotate in conjunction with the tapping roller driving cam 109.
[0033]
A jogger drive cam 118 is engaged with the jogger drive shaft 112 at the front and rear, respectively, and the jogger drive cam 118 is rotated by the rotation of the jogger drive shaft 112. The jogger drive cam 118 has a cam profile that converts the rotational motion of the jogger drive shaft 112 into a jogger rotational motion described later.
[0034]
Joggers 120 are arranged in the vicinity of the respective jogger driving cams 118 and outside the sheet conveying position. Each jogger 120 has a center of rotation on the upstream side and is rotatably attached. The jogger 120 has a convex portion, and the convex portion is engaged with the jogger driving cam 118, and the jogger 120 is rotated by the rotation of the jogger driving cam 118.
[0035]
As shown in FIG. 1, a stack tray (sheet stack position) 119 for stacking discharged sheets is disposed on the downstream side of the conveyance path of the discharge roller (first sheet conveyance unit) 113. .
[0036]
A stapler is disposed beside the guide claw 104 at a position facing the reference wall 111 of the bottom plate (alignment position) 110. In the stapler, a front end portion for stapling the sheet is disposed at a position protruding from the sheet conveyance position.
[0037]
In the above configuration, first, the home position of each configuration will be described. FIG. 1 shows this state.
The guide claw 104 has a home position in which a solenoid (not shown) is OFF, the guide claw 104 is substantially parallel to the conveyance path, and the sheet can pass therethrough.
[0038]
The bottom plate 110 has a convex portion 110b and a convex portion 112a of the jogger drive shaft 112 separated from each other, and a position pressed against the guide claw 104 by a spring (not shown) is set as a home position.
[0039]
The tapping roller driving cam (alignment member drive transmission device) 109 has a cam position at which the tapping roller (alignment member) 105 and the discharge roller (first sheet conveying means) 113 are retracted from the conveying path as the home position. To do.
[0040]
The jogger drive shaft 112 and the jogger drive cam 118 have a cam position at which the jogger is retracted from the sheet conveying position as the home position.
[0041]
In the discharge lever (second sheet conveying means) 151, the position where the portion that pushes out the sheet is retracted to the upstream side of the reference wall 111 of the bottom plate (alignment position) 110 is the home position, and the discharge lever 151 is the home position. The positions of the eccentric cam (second drive transmission means) 152, the stop pawl (lever member) 155, and the one-rotation clutch (clutch device) 154 are defined as the home position.
[0042]
Next, the operation will be described.
First, the operation in the through mode will be described with reference to FIGS.
As shown in FIG. 1, each component stands by at the home position. When a mode signal indicating the through mode and a motor ON signal are received from an image forming apparatus (not shown), the tapping roller drive cam 109 (alignment member drive transmission device) rotates counterclockwise by a predetermined angle. At this time, the discharge roller drive side of the tapping roller drive cam 109 has a cam profile that rotates the discharge roller drive shaft 115. The tapping roller driving side has a cam profile that does not change the tapping roller driving shaft 107. As a result, the discharge roller (first sheet conveying means) 113 protrudes into the conveying path and comes into contact with the driven roller 117 so that the sheet can be conveyed. At this time, the convex portion 109a of the tapping roller driving cam 109 moves in a direction away from the stop pawl (lever member) 155, so that the one-rotation clutch (clutch device) 154 is not operated and the release lever (second Sheet conveying means) 151 remains at the home position.
[0043]
The jogger drive shaft 112 and the jogger drive cam 118 rotate by a predetermined angle in conjunction with the tapping roller drive cam 109. However, in this range of rotation, the jogger drive cam 118 has a cam profile that keeps the jogger in the home position. Therefore, the jogger stays at the home position (FIG. 2).
[0044]
Thereafter, a conveyance drive motor (drive source) (not shown) is driven, and the driving force is transmitted to the first drive transmission means such as the discharge roller drive shaft 115 and the first sheet conveyance means (conveyance roller 101, conveyance intermediate). With the roller 102 and the discharge roller 113), the sheet sent from the image forming apparatus is discharged as it is to the stack tray (sheet stack position) 119 without performing post-processing.
[0045]
When the job is completed, the conveying drive motor is stopped, the tapping roller driving cam 109 is rotated by a predetermined amount counterclockwise, and the tapping roller driving cam 109 is returned to the home position, whereby the discharge roller (first sheet conveying means) 113 is moved. Return to home position.
[0046]
Next, the staple mode operation will be described with reference to FIGS. 1 and 3 to 8.
As shown in FIG. 1, each component stands by at the home position. When a mode signal indicating a stapling mode and a motor ON signal are received from an image forming apparatus (not shown), a conveyance drive motor (drive source) (not shown) is driven, and a conveyance roller (first sheet conveyance unit) 101, intermediate conveyance A roller (first sheet conveying means) 102, a tapping roller (alignment member) 105, and a discharge roller (first sheet conveying means) 113 rotate. When a sheet is sent from the image forming apparatus, the sheet is conveyed by the conveyance roller 101 and the conveyance intermediate roller 102. After a predetermined time after the conveyance sensor detects the trailing edge of the sheet (after the trailing edge of the sheet passes through the conveyance intermediate roller 102 and exceeds the leading edge of the guide claw 104), a guide claw driving solenoid (not shown) is turned ON. To do. As a result, the tip of the guide claw 104 rises so as to overlap with the upper guide plate (FIG. 3).
[0047]
Almost simultaneously with the raising of the guide claw 104, the tapping roller drive cam (alignment member drive transmission device) 109 rotates clockwise by a predetermined angle. At this time, the discharge roller drive side of the tapping roller drive cam 109 has a cam profile that does not change the discharge roller drive shaft 115. Therefore, the discharge roller 113 remains at the home position. The tapping roller driving side has a cam profile that rotates the tapping roller driving shaft 107. Therefore, the tapping roller 105 protrudes from the home position into the conveyance path as the tapping roller driving cam 109 rotates (FIG. 4).
[0048]
At this time, the jogger drive shaft 112 and the jogger drive cam 118 rotate by a predetermined angle in conjunction with the tapping roller drive cam (alignment member drive transmission device) 109. By this rotation, the convex portion 112a of the jogger drive shaft 112 engages with the convex portion 110b of the bottom plate (alignment position) 110 and rotates the bottom plate 110 to the right (FIG. 5). The rotation of the bottom plate 110 creates a gap between the guide claw 104 and the upstream portion of the bottom plate 110. In this range of rotation, the jogger drive cam 118 has a cam profile that moves the jogger from the home position to the alignment position for aligning the sheets. Therefore, the jogger moves to the close position. As a result, alignment in the direction perpendicular to the sheet conveying direction is performed.
[0049]
Thereafter, a tapping roller (alignment member) 105 protruding into the conveyance path comes into contact with the sheet. Since the tapping roller 105 rotates in the reverse direction with the conveying roller (first sheet conveying unit) 101, the sheet in contact with the tapping roller 105 is sent to the upstream side. At this time, since the guide claw 104 is in the raised state, the sheet is guided by the guide claw 104, and the sheet is fed into a gap formed by the movement of the bottom plate 110. The sheet sent to the gap is abutted against a reference wall 111 provided at the upstream end of the bottom plate, and alignment in the transport direction is performed using the bottom plate 110 as an alignment tray and the tapping roller 105 as an alignment member.
[0050]
At this time, as shown in FIG. 5B, the convex portion 109 a of the tapping roller driving cam 109 is in the vicinity of the stop claw (lever member) 155 and is in a position not engaged with the stop claw 155. For this reason, the stop pawl 155 is not operated, and the discharge lever (second sheet conveying means) 151 remains at the home position.
[0051]
Thereafter, the tapping roller driving cam 109 rotates counterclockwise by a predetermined angle and returns to the home position. At this time, the bottom plate 110 returns to the home position. Thus, the aligned sheet is held by sandwiching the sheet by the bottom plate 110 and the guide claw 104. The jogger returns to the home position as well. Continue to accept the next sheet.
[0052]
The next sheet is conveyed on the upper side of the previously aligned and held sheet. Since the previous sheet at this time is held between the bottom plate (alignment position) 110 and the guide claw 104, the aligned sheets are not displaced.
[0053]
After the trailing edge of the next sheet exceeds the guide claw 104, the same operation is performed and the next sheet is also aligned.
By repeating the above operation for a predetermined number of sheets, a predetermined number of sheets are aligned.
[0054]
After the predetermined number of sheets are aligned, the stapler is driven to perform post-processing of the sheets. Since the stapler holds the front end portion protruding in the conveyance path, the stapler can be stapled to the aligned sheets.
[0055]
After finishing the post-processing by the stapler, the tapping roller drive cam (alignment member drive transmission device) 109 is rotated clockwise more than the rotation angle during the alignment operation. By this rotation, the convex portion 109a of the tapping roller driving cam 109 causes the one-turn clutch (clutch device) 154 for swinging the release lever (second sheet conveying means) 151 to stop pawls (as shown in FIG. 6B). The eccentric cam (second drive transmission means) 152 is rotated by releasing the lever member 155 and connecting the one-rotation clutch 154. The hitting roller driving cam 109 rotates counterclockwise immediately after the stop pawl 155 is released, moves the convex portion 109a away from the stop pawl 155, and the stop pawl 155 returns to the home position. Therefore, the eccentric cam 152 rotates only once, and the release lever 151 swings once as shown in FIGS. As a result, the sheets that have been stacked on the bottom plate 110 serving as an alignment tray and have been post-processed are pushed by the discharge lever (second sheet conveying means) 151 and discharged to the stack tray (sheet stack position) 119. Thereafter, the tapping roller driving cam 109 is rotated counterclockwise by a predetermined amount, and the tapping roller driving cam 109 is returned to the home position.
[0056]
In the present embodiment, the second sheet conveying means is based on the swinging release lever 151. However, the same effect can be obtained even by using a belt device having a convex portion for discharging the post-processed sheet. it can.
[0057]
【The invention's effect】
  The effects of the invention of each claim are as follows.
<Claim 1>
  Aligns on the alignment tray and conveys post-processed sheets to the sheet stack positionDischarge meansThe clutch device andDischarge means drive shaftBecause it is driven by the driving force from the drive source viaDischargeAn expensive component such as a dedicated motor for the means is not required, and an inexpensive and small device can be obtained.
[0058]
<Claim 2>
Since the clutch device is a one-rotation clutch, the position of the second sheet conveying means is determined by the stop position of the clutch, so that no position detecting means such as a sensor is required, and the apparatus can be made inexpensive and small.
[0059]
<Claim 3>
  Alignment member that aligns sheets and drives the alignment memberDriving camThe clutch deviceDriving camTherefore, an expensive electromagnetic clutch or solenoid is not required, and an inexpensive and small device can be obtained.
[0060]
<Claim 4>
  A lever member is provided between the drive cam and the clutch device, and the lever member operates the discharge means in synchronization with the alignment member.Therefore, an expensive electromagnetic clutch or solenoid is not required, and an inexpensive and small device can be obtained.
[0061]
<Claim 5>
  Discharge means drive shaftBy converting the rotational motion ofBy transmitting to the discharge lever which is the discharge meansSince the motion converting mechanism for discharging the post-processed sheet is provided, the discharging operation can be performed with a simple mechanism, and an inexpensive and small apparatus can be obtained.
[0062]
<Claim 6>
  DischargeSince the means includes a belt device having a convex portion for discharging the post-processed sheet, the discharging operation can be performed with a simple mechanism, and the device can be made inexpensive and small.
[Brief description of the drawings]
1A and 1B show a sheet post-processing apparatus according to an embodiment of the present invention, in which FIG. 1A is a cross-sectional view, and FIG.
2A and 2B show the operation, and FIG. 2A is a cross-sectional view, and FIG. 2B is a partial mechanism diagram.
FIG. 3 is a similar view.
FIG. 4 is a similar diagram.
FIG. 5 is a similar diagram.
FIG. 6 is a similar diagram.
FIG. 7 is a similar diagram.
FIG. 8 is a similar diagram.
FIG. 9 is a perspective view of a part.
10 is a perspective view on the opposite side to FIG. 9. FIG.
[Explanation of symbols]
100 sheet post-processing apparatus
101 Conveying roller (first sheet conveying means)
102 conveying intermediate roller (first sheet conveying means)
103 Pressure film
104 Guide nails
105 Tapping roller (alignment member)
106 folders
107 Tapping roller drive shaft
108 lever
109 Tapping roller drive cam (alignment member drive transmission device)
109a Convex
110 Bottom plate (alignment position)
110a Center of rotation
110b Convex part
111 Base plate reference wall
112 Jogger drive shaft
112a Convex part
113 Discharge roller (first sheet conveying means)
114 folders
115 Discharge roller driving shaft (first drive transmission means)
116 lever
117 Follower roller
118 Jogger drive cam
119 Stack tray (sheet stack position)
151 Release lever (second sheet conveying means)
151a Long hole (second drive transmission means)
152 Eccentric cam (second drive transmission means)
152a Convex
153 Drive shaft (second drive transmission means)
154 Single-rotation clutch (clutch device)
155 Stop claw (lever member)

Claims (6)

In a sheet post-processing apparatus that receives a sheet from an image forming apparatus and discharges the sheet as it is to a sheet stack position after post-processing or without post-processing,
A drive cam driven by a drive device;
A discharge roller drive shaft that is rotated by the drive cam, a folder that is rotated together with the discharge roller drive shaft, and a discharge roller that is held by the folder and discharges a sheet that is not post-processed to the sheet stack position;
A jogger drive shaft that is rotated by the drive cam, and an alignment tray that is rotated together with the jogger drive shaft to place a sheet for alignment;
An alignment member drive shaft that is rotated by the drive cam, a second folder that rotates together with the alignment member drive shaft, and an alignment member that is held by the second folder and aligns sheets on the alignment tray When,
A discharge unit drive shaft that is rotated by the drive cam via a clutch device, and a discharge unit that is driven by the rotation of the discharge unit drive shaft to discharge the post-processed sheet from the alignment tray to the sheet stack position. When,
A sheet post-processing apparatus comprising:   2. The sheet post-processing apparatus according to claim 1, wherein the clutch device is a one-rotation clutch. 3. The sheet post-processing apparatus according to claim 1, wherein the discharge unit operates in synchronization with the alignment member . 4. 4. The sheet post-processing apparatus according to claim 3, wherein a lever member is provided between the drive cam and the clutch device, and the discharging member is operated in synchronization with the alignment member by the lever member. Post-processing device. 5. The post-processing apparatus according to claim 1, wherein a rotational movement of the discharge means driving shaft is converted into a reciprocating rotational movement and transmitted to a discharge lever which is the discharge means . A sheet post-processing apparatus comprising a motion conversion mechanism for discharging a sheet. 5. The sheet post-processing apparatus according to claim 1, wherein the discharge unit includes a belt device having a convex portion for discharging the post-processed sheet.

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