JP5838724B2 - Post-processing apparatus and image forming apparatus - Google Patents

Description

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

  As a post-processing device, a paper stacking table that receives and stacks recording paper from the exit roller, an end guide that aligns the recording paper on the paper stacking base, and a paper presser that presses the reference surface side edge of the recording paper toward the paper stacking side. And a main paddle that moves the recording sheet to the end guide side in a state where the sheet pressing member presses the reference surface side end of the recording sheet to the sheet stacking side. Further, there is a movable sub-paddle and a drive mechanism that moves the sub-paddle to the first position and the second position, and there is a sheet pressing member that operates in conjunction with the drive mechanism (Patent Document). 1).

  Further, as the sheet post-processing device, before the first sheet aligning unit acts on the sheet, the second sheet aligning unit is moved in a direction orthogonal to the sheet discharge direction to contact the end of the sheet, There is one provided with moving means for pushing the paper in a direction perpendicular to the discharge direction (see Patent Document 2).

JP 2009-249098 A JP 2005-314092 A

  An object of the present invention is to improve the accuracy with which a recording material conveying member is arranged at a predetermined location.

The invention according to claim 1 is a recording material conveying member that conveys a recording material and moves between a conveying position that conveys the recording material and a separated position that is further away from the conveying path of the recording material than the conveying position; A rotating member that is driven to rotate and moves the recording material conveying member; an eccentric member that is provided on the rotating member at a position eccentric from a rotation center of the rotating member; and rotates together with the rotating member; and the recording material conveying member The recording material conveyance member is supported between the conveyance position and the separation position by contacting the eccentric member that supports and is in contact with the eccentric member. causes moved, and a moving member having a specific area which is formed along the moving direction of the eccentric member for rotating a part of the contact area, the recording material conveying member, the movement It is the post-processing apparatus, characterized in that the specific area of the wood is placed in the transport position when in contact with the eccentric member.

According to a second aspect of the present invention, a driving source that supplies a driving force for rotating the rotating member, and when the driving force is received from the driving source, the rotating member is rotated in one direction and driven from the driving source. if not receiving a force is post-processing apparatus according to claim 1, characterized by having a said rotary member of the drive transmission mechanism that does not interfere with the rotation of the said one direction.
A third aspect of the present invention is the post-processing apparatus according to the first or second aspect, further comprising a speed reducing member that is provided in contact with the rotating member and decelerates the rotating member.
According to a fourth aspect of the present invention, there is provided an image forming mechanism for forming an image on a recording material, a recording material on which an image is formed by the image forming mechanism, and a transport position for transporting the recording material, and the transport position. A recording material conveyance member that moves between a separation position separated from the recording material conveyance path, a rotation member that is driven to rotate and moves the recording material conveyance member, and a position that is eccentric from the rotation center of the rotation member. An eccentric member that is provided on the rotating member and rotates together with the rotating member, and an eccentric member that has a contact area that supports the recording material conveying member and contacts the eccentric member, and the contact area rotates. with moving the recording material conveying member between said spaced position and the transport position by contact with, along the moving direction of the eccentric member for rotating a part of the contact area Is formed and a moving member having a specific area, the recording material conveying member, and wherein the specific region of the movable member is disposed in the transport position when in contact with the eccentric member The image forming apparatus.

According to the first aspect of the present invention, it is possible to improve the accuracy of disposing the recording material conveying member at a predetermined place as compared with the case where this configuration is not provided. In addition, according to the first aspect of the present invention, it is possible to improve the accuracy of disposing the recording material conveying member at the conveying position as compared with the case where this configuration is not provided. According to the first aspect of the present invention, when the angle of the stopped eccentric member is an angle within a predetermined range as compared with the case where this configuration is not provided, the recording material conveying member is determined in advance. Can be placed in any place.

According to invention of Claim 2 , compared with the case where this structure is not provided, it can avoid that the rotating member rotating when the drive source stops stops suddenly.
According to invention of Claim 3 , compared with the case where it does not have this structure, after a drive is no longer transmitted to a rotation member, the angle which a rotation member rotates before a rotation member stops can be suppressed. .
According to the fourth aspect of the present invention, it is possible to improve the accuracy of disposing the recording material conveying member at a predetermined place as compared with the case where this configuration is not provided.

1 is a diagram showing an overall configuration of an image forming system to which an embodiment of the present invention is applied. 1 is a diagram illustrating an image forming apparatus. It is a figure explaining the post-processing apparatus to which this Embodiment is applied. It is the figure which detailed the structure of the post-processing part. It is the figure which detailed the structure of the sub paddle unit. It is the figure which detailed the structure of a link guide and a cam periphery. It is the figure which detailed the structure around a one-way clutch and a stepping motor. It is the figure which detailed the structure around a link guide and a pin. It is the figure explaining the positional relationship of a link guide and a pin. It is the figure which detailed the structure of the link guide. It is a figure explaining the effect | action of a curved area | region. It is a block diagram of a control part. FIG. 10 is a diagram detailing a configuration around a pin in another configuration example 1; It is the figure which detailed the structure of the pin periphery in the other structural example 2. FIG. 10 is a diagram detailing a configuration around a disc brake in another configuration example 2;

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
<Image forming system 1>
FIG. 1 is a diagram showing an overall configuration of an image forming system 1 to which an embodiment of the present invention is applied. An image forming system 1 shown in FIG. 1 includes, for example, an image forming apparatus 2 such as a printer or a copying machine that forms an image on a recording material by an electrophotographic method, and a recording material (for example, an image recorded by the image forming apparatus 2). And a post-processing device 3 that performs post-processing on the paper.

<Image forming apparatus 2>
FIG. 2 is a diagram illustrating the image forming apparatus 2.
The image forming apparatus 2 which is an example of the image forming mechanism is a so-called “tandem type” color printer, and controls the operation of the image forming apparatus 10 and the entire image forming apparatus 2 for forming an image based on image data, for example, a personal computer. A main control unit 50 that executes communication with a PC, image processing performed on image data, and the like, and a user interface (UI) unit 90 that accepts operation input from the user and displays various information to the user It has.

<Image forming unit 10>
The image forming unit 10 is a functional unit that forms an image by, for example, electrophotography, and includes six image forming units 11C, 11M, 11HC, 11HM, 11Y, and 11K (hereinafter, “image forming unit 11”), The intermediate transfer belt 20 to which each color toner image formed on the photosensitive drum 12 of the image forming unit 11 is transferred, and each color toner image formed by each image forming unit 11 is transferred to the intermediate transfer belt 20 (primary transfer). The primary transfer roll 21 is provided.
Further, the image forming unit 10 includes a secondary transfer roll 22 that collectively transfers (secondary transfer) each color toner image transferred onto the intermediate transfer belt 20 onto a recording material, and each color toner image that is secondarily transferred. And a fixing unit 60 as an example of a fixing unit (fixing device) for fixing the image on the recording material.

  In addition, the image forming unit 10 cools each color toner image fixed on the recording material by the fixing unit 60, and promotes fixing of each color toner image on the recording material, and bending of the recording material. And a curl correction unit 85 for correcting (curl). An area where the secondary transfer roll 22 is disposed and each color toner image on the intermediate transfer belt 20 is secondarily transferred to the recording material is hereinafter referred to as a “secondary transfer area Tr”.

<Image forming unit 11>
Each image forming unit 11 functions as a functional member, for example, a photosensitive drum 12 on which an electrostatic latent image is formed and then each color toner image is formed, and the surface of the photosensitive drum 12 is charged with a predetermined potential. A charger 13 that exposes the photosensitive drum 12 charged by the charger 13 based on image data, and development that develops the electrostatic latent image formed on the photosensitive drum 12 with toner of each color. And a cleaner 16 for cleaning the surface of the photosensitive drum 12 after transfer.
Each developing unit 15 of each image forming unit 11 is connected to toner containers 17C, 17M, 17HC, 17HM, 17Y, and 17K (hereinafter referred to as “toner containers 17”) for storing toners of respective colors by toner transport paths (not shown). ing. Each color toner is supplied from the toner container 17 to the developing device 15 by a supply screw (not shown) provided in the toner conveyance path.

  Each of the image forming units 11 is configured in substantially the same manner except for the toner accommodated in the developing unit 15, and each of them is C (cyan) color, M (magenta) color, HC (high chroma cyan) color, and HM (high chroma magenta). Color, Y (yellow), and K (black) toner images are formed. The HC color here is a cyan color having a cyan hue, a hue that is brighter and higher in saturation than the C color, and the HM color has a magenta hue, and M color. It is a magenta color with a brighter color tone and a relatively high saturation.

<Recording material conveyance system>
The image forming unit 10 is housed in a plurality of (two in the present embodiment) recording material storage containers 40A and 40B for storing the recording material and the recording material storage containers 40A and 40B as the recording material transport system. Feeding rolls 41A and 41B for feeding and transporting the recording material, a first transport path R1 for transporting the recording material from the recording material storage container 40A, and a second transport path for transporting the recording material from the recording material storage container 40B R2. Further, the image forming unit 10 includes a recording material storage container 40A and a third transport path R3 that transports the recording material from the recording material storage container 40B toward the secondary transfer region Tr. In addition, the image forming unit 10 conveys the recording material on which the color toner images are transferred in the secondary transfer region Tr so as to pass through the fixing unit 60, the cooling unit 80, and the curl correction unit 85. R4 and a fifth transport path R5 that transports the recording material from the curl correction unit 85 from the discharge unit of the image forming apparatus 2 toward the post-processing apparatus 3.
From the first conveyance path R1 to the fifth conveyance path R5, conveyance rolls and conveyance belts are arranged along the respective conveyance paths, and sequentially convey the recording materials that are sent.

<Double-sided conveyance system>
In addition, the image forming unit 10 includes, as a double-sided conveyance system, an intermediate recording material container 42 that temporarily holds a recording material in which each color toner image is fixed on the first surface by the fixing unit 60, and a recording material from the curl correction unit 85. A sixth transport path R6 for transporting the recording material toward the intermediate recording material storage container 42, and a seventh transport path R7 for transporting the recording material stored in the intermediate recording material storage container 42 toward the third transport path R3. It is equipped with. Further, the image forming unit 10 is disposed on the downstream side of the curl correction unit 85 in the recording material conveyance direction, and conveys the recording material to the fifth conveyance path R5 and the intermediate recording material container 42 for conveying the recording material toward the post-processing device 3. A distribution mechanism unit 43 that selectively distributes to the sixth transport path R6; and a feed roll 45 that feeds the recording material stored in the intermediate recording material storage container 42 and transports the recording material toward the seventh transport path R7. ing.

<Image forming operation>
Next, a basic image forming operation in the image forming apparatus 2 according to the present embodiment will be described with reference to FIG.
Each of the image forming units 11 of the image forming unit 10 forms toner images of C color, M color, HC color, HM color, Y color, and K color by an electrophotographic process using the above functional members. Each color toner image formed by each image forming unit 11 is primary-transferred sequentially on the intermediate transfer belt 20 by the primary transfer roll 21 to form a composite toner image in which the respective color toners are superimposed. The synthetic toner image on the intermediate transfer belt 20 is conveyed to the secondary transfer region Tr in which the secondary transfer roll 22 is disposed as the intermediate transfer belt 20 moves (in the direction of the arrow).

On the other hand, in the recording material transport system, the feeding rolls 41A and 41B rotate in synchronization with the start timing of image formation in each image forming unit 11, and the UI unit, for example, is selected from the recording material storage container 40A and the recording material storage container 40B. The recording material designated at 90 is fed by the feeding rolls 41A and 41B. The recording material fed by the feeding rolls 41A and 41B is transported along the first transport path R1 or the second transport path R2 and the third transport path R3 and reaches the secondary transfer region Tr.
In the secondary transfer region Tr, the composite toner image held on the intermediate transfer belt 20 is secondarily transferred collectively to the recording material by the transfer electric field formed by the secondary transfer roll 22.

Thereafter, the recording material onto which the composite toner image has been transferred is separated from the intermediate transfer belt 20 and conveyed to the fixing unit 60 along the fifth conveyance path R5. The synthesized toner image on the recording material conveyed to the fixing unit 60 is fixed on the recording material by the fixing unit 60 after being subjected to a fixing process. The recording material on which the fixed image is formed is cooled by the cooling unit 80 and the curl correcting unit 85 corrects the bending of the recording material. Thereafter, the recording material that has passed through the curl correction unit 85 is guided by the distribution mechanism unit 43 to the fifth transport path R5 during single-sided printing and transported toward the post-processing device 3.
The toner (primary transfer residual toner) adhering to the photosensitive drum 12 after the primary transfer and the toner (secondary transfer residual toner) adhering to the intermediate transfer belt 20 after the secondary transfer are respectively cleaner 16, And removed by the belt cleaner 26.

On the other hand, during double-sided printing, the recording material on which the fixed image is formed on the first surface of the recording material by the above-described process passes through the curl correction unit 85 and is then guided to the sixth transport path R6 by the distribution mechanism unit 43. Then, it is transported through the sixth transport path R6 toward the intermediate recording material container 42. Again, the feeding roll 45 rotates in accordance with the start timing of image formation on the second surface by each image forming unit 11, and the recording material is fed out from the intermediate recording material container 42. The recording material fed by the feeding roll 45 is transported along the seventh transport path R7 and the third transport path R3, and reaches the secondary transfer region Tr.
In the secondary transfer region Tr, each color toner image on the second surface held on the intermediate transfer belt 20 is applied to the recording material by the transfer electric field formed by the secondary transfer roll 22 as in the case of the first surface. Secondary transfer is performed at once.

Then, the recording material on which the toner images are transferred on both sides is fixed by the fixing unit 60 as in the case of the first surface, cooled by the cooling unit 80, and further bent by the curl correction unit 85. Is corrected. Thereafter, the recording material that has passed through the curl correction unit 85 is guided to the fifth transport path R5 by the distribution mechanism unit 43 and transported toward the post-processing device 3.
In this way, the image forming process in the image forming apparatus 2 is repeatedly executed for the number of printed sheets.

<Post-processing device 3>
FIG. 3 is a diagram illustrating the post-processing device 3 to which the present exemplary embodiment is applied.
The post-processing device 3 shown in FIG. 3 includes a conveyance unit 110 that conveys the recording material output from the image forming apparatus 2 further downstream, and a compile stacking unit that collects and bundles, for example, binding staples and recording materials. And a post-processing unit 120 including 124 and the like. The post-processing device 3 also includes a stacker 190 that stacks recording materials so that the user can easily take them. The post-processing device 3 includes a control unit 200 that controls the entire post-processing device 3, and the control unit 200 is provided in the post-processing unit 120, for example.

  As shown in FIG. 3, the conveyance unit 110 of the post-processing device 3 includes an entrance roll 111 that is a pair of rolls that receives a printed recording material output from the image forming apparatus 2 (see FIG. 1). It has the 1st conveyance roll 112 which is a pair of roll which conveys a recording material downstream, and the 2nd conveyance roll 113 which is a pair of roll which conveys a recording material toward the post-processing part 120.

  The post-processing unit 120 of the post-processing device 3 has the following members inside the housing structure 120a. The post-processing unit 120 includes a receiving roll 121 that is a pair of rolls that receive the recording material from the transport unit 110, and an exit sensor 122 that is provided on the downstream side of the receiving roll 121 and detects the recording material. The post-processing unit 120 also collects and stacks a plurality of recording materials that are sequentially conveyed, and an exit roll 123 that is a pair of rolls that discharge the recording material toward the compilation stacking unit 124. It has.

  Further, the post-processing unit 120 binds the main paddle 125 and the sub paddle 126 that rotate to push the rear end of the recording material toward the end guide (described later) of the compilation stacking unit 124, and the end of the bundle of recording materials. The stapler 127 is provided. Further, an eject roll 128 is provided for conveying a bundle of recording materials accumulated in the compilation stacking unit 124 to the stacker 190.

FIG. 4 is a diagram detailing the configuration of the post-processing unit 120.
First, the compiling stacking unit 124 includes a recording material stacking table 124a for receiving and stacking a recording material from the exit roll 123, and an end guide 124b formed in a direction intersecting the recording material stacking surface of the recording material stacking table 124a. doing. The end guide 124b is a reference surface that serves as a reference for aligning the end surfaces of the recording materials when aligning the recording materials discharged from the exit roll 123, and the end guides 124b are brought into contact with the end guides 124b so as to bundle the recording materials. Is generated.

  As shown in FIG. 4, the main paddle 125 has three flexible recording material contact portions 125a. The main paddle 125 comes into contact with the upper surface of the recording material (or the uppermost surface of the bundle of recording materials) and puts the recording material on it. A member that is pushed (conveyed) toward the end guide 124b. The main paddle 125 has a paddle support shaft 131 that is rotatably supported above the end guide 124 b side of the compilation stacking unit 124. A plurality of (three in the present embodiment) main paddles 125 are fixedly supported on the paddle support shaft 131 at intervals in a direction orthogonal (crossing) to the recording material conveyance direction. The paddle support shaft 131 is rotationally driven by a motor (not shown) disposed on the back side of the apparatus (back side of the paper surface in FIG. 4). Then, as the paddle support shaft 131 rotates, the main paddle 125 rotates in the R direction in FIG. 4, so that the recording material conveyed in the Z1 direction in FIG. 4 is placed on the recording material loading platform 124a. And push in the Z2 direction.

  As shown in FIG. 4, the sub paddle 126 has three flexible recording material contact portions 126a, and is arranged on the upper surface of the recording material on the recording material stacking base 124a (or the uppermost surface of the bundle of recording materials). A member that contacts and pushes (conveys) the recording material toward the end guide 124b. The sub paddle 126 has a sub paddle rotating shaft 126b that is rotatably provided. In the illustrated example, two sub-paddles 126 are provided at an interval on the front side of the apparatus (front side of the paper in FIG. 4) and the back side of the apparatus (back side of the paper in FIG. 4).

  Although details will be described later, the sub-paddle 126 constitutes a part of the sub-paddle unit 140. When the sub-paddle unit 140 swings, a contact position (conveying position, FIG. 4) for contacting the recording material on the recording material stacking base 124a of the compiling stacking section 124 and pushing the recording material toward the end guide 124b. The sub-paddle 126 is swung between the contact position and the non-contact position (separated position, the position indicated by the solid line in FIG. 4) that is retracted from the contact position and does not contact the recording material on the recording material stacking table 124a. Let The recording material loading platform 124a of the compilation stacking unit 124 can be regarded as a part of the recording material conveyance path.

  In addition, the post-processing unit 120 includes both ends of the recording material (in the recording material conveyance direction) in a direction orthogonal to (crossing) the recording material conveyance direction of the compilation stacking unit 124 (front side and back side of the paper surface in FIG. 4). A tamper (not shown) is provided for alignment with respect to both sides in the orthogonal direction.

Next, the stapler 127 will be described.
The stapler 127 is a staple head 127a that performs a binding process using a staple on a bundle of recording materials, a base 127b that supports the staple head 127a, and a path on which the staple head 127a moves. And a rail 127c to be formed. The rail 127c is formed along the end of the recording material stacking table 124a, and the staple head 127a moves on the rail 127c and performs a binding process. Further, a staple move motor (not shown) that is a stepping motor for moving the staple head 127a, a staple move home sensor (not shown) that detects the home position of the staple head 127a, and the center position of the staple head 127a are detected. And a staple center position sensor (not shown).

When one-point binding is performed on a bundle of recording materials on the compilation stacking unit 124, the staple head 127a is positioned at a first home position position detected by a staple move home sensor (not shown). The binding process is sequentially executed at a necessary timing.
On the other hand, when performing two-point binding on a bundle of recording materials, the apparatus first waits at a second home position position detected by a staple center position sensor (not shown). Thereafter, after a set of recording materials is stacked on the compilation stacking unit 124, a staple move motor (not shown) is driven to move the staple head 127a to the staple position, and binding processing is performed at two locations.

Next, the eject roll 128 will be described.
As shown in FIG. 4, the eject roll 128 has a drive side eject roll 128a and a driven side eject roll 128b. The drive side eject roll 128a and the driven side eject roll 128b are provided so as to be separated from each other.

  The drive-side eject roll 128a is rotatably supported by a frame (not shown), and is fixedly supported on a rotary shaft (not shown) that is driven to rotate by an eject motor (not shown). Then, the drive side eject roll 128a rotates as the eject motor rotates, and the recording material stacked on the compiling stacking unit 124 is discharged by the driven side eject roll 128b rotating (FIG. 4). Z3).

  The driven eject roll 128b is supported by a driven eject roll support member (not shown). The driven-side eject roll 128b is in contact with the recording material loaded on the recording material loading table 124a of the compiling stacking portion 124 as the driven-side eject roll support member (not shown) swings. Then, it swings between a retreat position for retreating from the recording material loaded on the recording material loading table 124a of the compiling stacking unit 124.

<Sub paddle unit 140>
Next, the sub-paddle unit 140 will be described with reference to FIG.
As shown in FIG. 4, the sub-paddle unit 140, which is an example of the recording material conveying member, is provided above the compilation stacking unit 124. The sub-paddle unit 140 has a sub-paddle support shaft 141 as a rotation shaft that becomes the center of rotation when the sub-paddle 126 is swung. The sub paddle unit 140 has a sub paddle support member 142 that supports the sub paddle 126.

  Here, as shown in FIG. 4, the sub paddle support shaft 141 is rotatably supported above the compilation stacking portion 124. The sub paddle support shaft 141 becomes the center of rotation when the sub paddle 126 is swung between the contact position and the non-contact position. The sub paddle support shaft 141 is rotationally driven by a sub paddle drive motor (not shown). A sub paddle belt (not shown) is attached to the sub paddle support shaft 141 and the sub paddle rotation shaft 126 b, and the drive by the sub paddle drive motor is transmitted to the sub paddle 126 through the sub paddle support shaft 141.

  The sub paddle support member 142 rotatably supports the sub paddle 126 via the sub paddle rotating shaft 126b. The end of the sub paddle support member 142 opposite to the end supporting the sub paddle 126 is fitted to the sub paddle support shaft 141 with a clearance fit. The sub paddle support member 142 can rotate around the sub paddle support shaft 141.

Next, the configuration of the sub-paddle unit 140 will be described in detail with reference to FIG. FIG. 5 is a diagram illustrating the configuration of the sub-paddle unit 140 in detail.
First, as shown in FIG. 5, the sub-paddle support member 142 of the sub-paddle unit 140 has a sub-paddle arm 142 a protruding from the periphery of the sub-paddle support shaft 141. The sub paddle arm 142a supports the sub paddle 126 in a rotatable manner. Also, the illustrated sub-paddle support member 142 is provided with two sub-paddle arms 142 a spaced apart from each other, and each sub-paddle arm 142 a supports the sub-paddle 126.

  The sub paddle unit 140 includes a link guide support member 147 provided integrally with the sub paddle support member 142 and a link guide 149 supported by the link guide support member 147. Furthermore, the sub-paddle unit 140 has a drive mechanism 160 that moves the sub-paddle 126 between the contact position and the non-contact position via the link guide 149.

As shown in FIG. 5, the link guide support member 147 is provided integrally with the sub paddle support member 142, and the link guide support member 147 in the illustrated example is provided so as to protrude from the periphery of the sub paddle support shaft 141.
The link guide 149 is an annular member that is supported by the link guide support member 147. A pin 151 described later is inserted into the space inside the link guide 149. The link guide 149 rotates around the sub paddle support shaft 141 while guiding the pin 151 (see arrow C).
The sub paddle support member 142, the link guide support member 147, and the link guide 149 can be regarded as moving members.

<Drive mechanism 160>
Next, the drive mechanism 160 will be described with reference to FIGS. FIG. 6 is a diagram detailing the configuration around the link guide 149 and the cam 161. FIG. 7 is a diagram detailing the structure around the one-way clutch 165 and the stepping motor 169. More specifically, FIG. 7 is a view seen from the direction of arrow VII in FIG.
The drive mechanism 160 is a mechanism that swings the link guide 149. The drive mechanism 160 includes a mechanism that transmits a driving force to the link guide 149 and a mechanism that controls the movement of the link guide 149.

First, a mechanism for transmitting a driving force to the link guide 149 will be described.
The drive mechanism 160 includes a stepping motor 169, a cam rotation shaft 163, a cam 161, a pin 151, a pulley 168, a motor belt 173, and a pulley belt 171 as a mechanism for transmitting a driving force to the link guide 149. Have.

  A stepping motor 169, which is an example of a drive source, supplies a driving force that swings the link guide 149. The stepping motor 169 is configured to obtain a rotation angle proportional to the number of input pulses. The cam rotation shaft 163 receives the driving force of the stepping motor 169 and rotates. A cam 161, which is an example of a rotating member, is provided on the cam rotation shaft 163 and rotates together with the cam rotation shaft 163.

  A pin 151, which is an example of an eccentric member, is supported by the cam 161 at a position that is eccentric from the cam rotation shaft 163. Here, as shown in FIG. 6, the pin 151 is disposed along the cam rotation shaft 163. The pin 151 includes a pin shaft 151a, a roller 151b that is rotatably provided around the pin shaft 151a, and a flange portion 151c that is provided continuously with the roller 151b and prevents the pin 151 from coming off the link guide 149. Have

  Further, the pin 151 is disposed inside the link guide 149. As the cam 161 rotates, the pin 151 rotates around the cam rotation shaft 163 around the cam rotation shaft 163. As the pin 151 rotates around the cam rotation shaft 163, the pin 151 slides in the link guide 149. Further, as the pin 151 rotates around the cam rotation shaft 163, the pin 151 presses the link guide 149. Although details will be described later, the link guide 149 swings (see arrow C) when the pin 151 rotates around the cam rotation shaft 163.

  The pulley 168 is provided between the stepping motor 169 and the cam rotation shaft 163. The pulley 168 transmits the drive of the stepping motor 169 to the cam rotation shaft 163. The motor belt 173 is attached to the stepping motor 169 and the pulley 168. Further, the pulley belt 171 is attached to a pulley 168 and a one-way clutch 165 (described later).

  If the driving of the stepping motor 169 is transmitted to the cam rotation shaft 163, the pulley 168, the motor belt 173, and the pulley belt 171 are not necessarily provided. For example, a configuration may be provided in which a gear for transmitting driving is provided between the stepping motor 169 and the cam rotation shaft 163, or a configuration in which the stepping motor 169 directly rotates the cam rotation shaft 163 may be employed.

Next, a mechanism for controlling the movement of the link guide 149 will be described.
The drive mechanism 160 includes a one-way clutch 165, a leaf spring 162, and an eccentric member 167 as a mechanism for controlling the movement of the link guide 149.
A one-way clutch 165, which is an example of a drive transmission mechanism, is provided on the cam rotation shaft 163. In the illustrated example, a pulley belt 171 is attached and is driven by the pulley belt 171.
Here, when the one-way clutch 165 receives driving from the pulley belt 171 and rotates the cam rotation shaft 163 in one direction (arrow A direction), the one-way clutch 165 is rotated together with the cam rotation shaft 163. On the other hand, when the cam rotation shaft 163 is rotated in the other direction (the direction opposite to the arrow A), the one-way clutch 165 idles around the cam rotation shaft 163.

  A leaf spring 162, which is an example of a deceleration member, is provided so as to contact the outer periphery of the cam 161. The leaf spring 162 applies a resistance force to the cam 161 when the cam 161 rotates. In other words, the leaf spring 162 in the illustrated example applies a resistance force so as to gently stop the rotation of the cam 161.

The eccentric member 167 has a center of gravity at a position eccentric with respect to the cam rotation shaft 163. In the illustrated example, the eccentric member 167 is a fan-shaped member provided on the cam rotation shaft 163. The eccentric member 167 acts to stop the cam rotation shaft 163 at an angle at which the position of the center of gravity of the eccentric member 167 is below the cam rotation shaft 163. More specifically, the eccentric member 167 acts to direct the cam rotation shaft 163 at a predetermined angle.
Further, the angle of the cam rotation shaft 163 can be detected by detecting the eccentric member 167 by a detection means (not shown). Further, by detecting the angle of the cam rotation shaft 163, the position of the sub paddle 126 that moves according to the angle of the cam rotation shaft 163 can be grasped.

<Link guide 149 and pin 151>
Next, the configuration of the link guide 149 and the pin 151 will be described with reference to FIGS. 8 and 9. Here, FIG. 8 is a diagram detailing the configuration around the link guide 149 and the pin 151. FIG. 8 is a view seen from the direction of arrow VIII in FIG. FIG. 9 is a diagram illustrating the positional relationship between the link guide 149 and the pin 151.

As shown in FIG. 8, the link guide 149 is an annular member provided so that the pin 151 can move in the inner space. The space inside the link guide 149 has a width that can accommodate the pin 151 and a length that allows the pin 151 to move.
The link guide 149 is made of a highly wear-resistant resin or metal. The link guide 149 is made of, for example, polyacetal (POM). In the illustrated example, the link guide 149 is provided as a separate member from the link guide support member 147. When the link guide 149 is worn, only the link guide 149 can be replaced.

Here, as shown in FIGS. 9A and 9B, the pin 151 changes its position around the cam rotation shaft 163 by the rotation of the cam 161 that supports the pin 151. Here, when the pin 151 moves in the direction of rotation around the sub paddle support shaft 141, the link guide 149 follows the movement of the pin 151. More specifically, as the pin 151 moves, the link guide 149 swings.
On the other hand, when the pin 151 moves in the direction of moving back and forth with respect to the sub paddle support shaft 141, the link guide 149 does not follow the movement of the pin 151. In other words, the link guide 149 allows the pin 151 to move inside the link guide 149. More specifically, the pin 151 reciprocates along the longitudinal direction of the link guide 149.

  The link guide support member 147 swings as the pin 151 rotates around the cam rotation shaft 163 (see arrow C in FIG. 8), and reciprocates between the near point and the far point. Here, the near point is a turning point when the link guide support member 147 that reciprocates is turned downward. On the other hand, the far point is a turning point when the link guide support member 147 that reciprocates is turned upward.

  When the link guide support member 147 is disposed at a near point, the sub paddle 126 provided integrally with the link guide support member 147 corresponds to the recording material loaded on the compilation stacking portion 124 (see FIG. 4). The closest position. Further, when the link guide support member 147 is disposed at the far point, the sub paddle 126 is at a position furthest away from the recording material loaded on the compilation loading section 124 (see FIG. 4).

  As the pin 151 rotates around the cam rotation shaft 163, the pin 151 moves in the space inside the link guide 149. Here, the pin 151 is disposed in the space inside the link guide 149 that is an annular member, and the space inside the link guide 149 is wide enough to accommodate the pin 151 as described above. Therefore, when the cam 161 rotates around the cam rotation shaft 163, the state in which the pin 151 and the link guide 149 are in contact with each other at any angle is maintained, and the pin 151 rattles in the link guide 149. There is nothing.

<Link guide 149>
Next, a detailed configuration of the link guide 149 will be described with reference to FIG. Here, FIG. 10 is a diagram detailing the configuration of the link guide 149.
As shown in FIG. 10A, the link guide 149 has a contact area that contacts the pin 151 in the inner space. This contact region has a linear region S that guides the pin 151 in the linear direction (longitudinal direction) and a curved region T that guides the pin 151 in the curved direction. As shown in FIG. 8, the curved region T is formed so as to protrude in a direction away from the cam rotation shaft 163. This curved region T can be regarded as a specific region.
In the illustrated example, two linear regions S are formed so as to sandwich the curved region T in the longitudinal direction of the link guide 149. Further, the two linear regions S and the curved region T are continuous. The two straight regions S and the curved region T are smoothly continuous, so that the pin 151 moves smoothly between the straight region S and the curved region T.

Here, the curved region T will be described with reference to FIG.
First, the pin 151 inserted in the link guide 149 is a portion that contacts the link guide 149, and the portion of the pin 151 that is farthest from the cam rotation shaft 163 is defined as an outer point 151o. Further, the portion of the pin 151 that is in contact with the link guide 149 and closest to the cam rotation shaft 163 is defined as an inner point 151i.

Further, by rotating around the cam rotation shaft 163, the locus drawn by the outer point 151o is defined as an outer circle Lo. In addition, when the pin 151 rotates around the cam rotation shaft 163, the locus drawn by the inner point 151i is defined as an inner circle Li. As shown in FIG. 10B, the radius of the outer circle Lo is defined as a radius ro, and the radius of the inner circle Li is defined as a radius ri.
A region sandwiched between the inner circle Li and the outer circle Lo is annular. And as shown in FIG.10 (b), a part of this cyclic | annular area | region becomes the above-mentioned curved area | region T. FIG.

More specifically, as shown in FIG. 10A, the curved region T is a region inside the link guide 149 and is a region sandwiched between the first curved surface 1495 and the second curved surface 1496. The first curved surface 1495 is a surface far from the cam rotation shaft 163, and the second curved surface 1496 is a surface near the cam rotation shaft 163.
The first curved surface 1495 is formed with the radius ro of the outer circle Lo as the curvature radius. On the other hand, the second curved surface 1496 is formed with the radius ri of the inner circle Li as the curvature radius. Further, the center of the radius of curvature of the first curved surface 1495 and the center of the radius of curvature of the second curved surface 1496 are the same (see the center point 0).

  As shown in FIG. 10A, the straight region S is a region inside the link guide 149, and is defined by a first plane 1491 and a second plane 1492 that are planes along the longitudinal direction of the link guide 149, respectively. It is an area that is sandwiched. The first plane 1491 is a surface far from the cam rotation shaft 163, and the second plane 1492 is a surface near the cam rotation shaft 163.

<Operation of curved region T>
Next, the action of the curved region T will be described with reference to FIG. Here, FIG. 11 is a diagram illustrating the action of the curved region T. FIG.
As described above, when the pin 151 rotates around the cam rotation shaft 163, the link guide 149 swings. However, when the pin 151 passes through the curved region T, the position of the link guide 149 does not change even though the pin 151 rotates around the cam rotation shaft 163.

  This is because the curved region T is formed along the locus of the pin 151 as described above. This is because the pin 151 does not press the link guide 149 when the pin 151 passes through the curved region T. More specifically, when the pin 151 passes through the curved region T, the first curved surface 1495 and the second curved surface 1496 of the link guide 149 guide the pin 151 in the direction in which the pin 151 moves. In other words, the curved region T of the link guide 149 absorbs the movement of the pin 151.

For example, the angle of the cam 161 that supports the pin 151 is different between the state shown in FIG. 11A and the state shown in FIG. On the other hand, the position of the link guide support member 147 in the vertical direction in FIG. 11 does not change (see the broken line in the figure).
Here, the pins 151 shown in FIGS. 11A and 11B are both disposed in the curved region T. FIG. More specifically, in FIG. 11A, the pin 151 is disposed in a continuous portion of the straight region S and the curved region T. Further, in FIG. 11B, the pin 151 is disposed at the center of the curved region T.
In addition, the cam 161 shown to Fig.11 (a) is a motor stop angle which is an angle which the stepping motor 169 stops. The cam 161 shown in FIG. 11B is a near point arrangement angle that is an angle at which the link guide support member 147 is arranged at the near point.

<Control unit 200>
Next, the control unit 200 will be described.
FIG. 12 is a block diagram of the control unit 200.
As illustrated in FIG. 12, the control unit 200 includes a CPU 201, a ROM 202, a RAM 203, an input interface 204, and an output interface 205. In the ROM 202, for example, a binding processing program, a recording material conveyance program, a discharge program, and the like are stored in advance. Then, the control unit 200 takes in a signal from the control device provided in the image forming apparatus 2 (see FIG. 1) to the CPU 201 via the input interface 204. Then, the CPU 201 executes a predetermined processing program, sends a control signal to the control target via the output interface 205, and controls operations of, for example, a stepping motor 169 and a sub-paddle drive motor (not shown).

Next, control performed by the control unit 200 will be described with reference to FIGS. 4, 7, and 11.
Control unit 200 drives a sub-paddle drive motor (not shown). As shown in FIG. 4, according to the driving of the sub paddle drive motor, the rotation is transmitted through the sub paddle support shaft 141, the sub paddle belt (not shown), and the sub paddle rotating shaft 126b, and the sub paddle 126 rotates.

  In addition, the control unit 200 drives the stepping motor 169. As shown in FIG. 7, according to the driving of the stepping motor 169, the driving is transmitted through the motor belt 173, the pulley 168, the pulley belt 171, the one-way clutch 165, and the cam rotating shaft 163, and the cam 161 rotates (arrow). A direction). Then, as the cam 161 rotates in the direction of the arrow A, the link 151 is rotated while the pin 151 provided on the cam 161 moves inside the link guide 149 to swing the link guide support member 147 ( (See arrow C). As the link guide support member 147 swings, the sub-paddle 126 moves forward and backward with respect to the recording material loaded on the compilation stacking portion 124 (see FIG. 4).

  The control unit 200 controls the sub paddle 126 to stop at a position closest to the recording material loaded on the compilation loading unit 124 (see FIG. 4). The sub paddle 126 closest to the recording material rotates in the R direction in FIG. 4, and the recording material conveyed in the Z1 direction in FIG. 4 is transferred to the recording material loading table of the compilation stacking unit 124. Push in the Z2 direction on 124a. In other words, the sub paddle 126 scrapes back the recording material conveyed in the Z1 direction in FIG.

Here, the control in which the control unit 200 stops the sub paddle 126 at the position closest to the recording material loaded on the compilation stacking unit 124 will be described in detail.
In the present embodiment, the control unit 200 controls the number of input pulses to the stepping motor 169, and the stepping is performed at an angle (see FIG. 11A) at which the cam 161 rotating in the arrow A direction becomes the motor stop angle. The motor 169 is stopped. Note that this motor stop angle is an angle in front of the angle at which the cam 161 is finally stopped. At this time, the pin 151 is arranged at the boundary between the straight region S and the curved region T as described above.

After the stepping motor 169 stops, the cam 161 tries to continue to rotate due to inertia (so-called overshoot). This overshoot becomes conspicuous particularly when the cam 161 is rotating at a high speed.
Here, the cam 161 tries to continue to rotate (see arrow A), whereas the one-way clutch 165 connected to the stepping motor 169 tries to stop the rotation. Thus, when viewed from the one-way clutch 165, the cam rotation shaft 163 provided with the cam 161 is in a state of attempting to rotate the one-way clutch 165 in the other direction (the direction opposite to the arrow A). As a result, the one-way clutch 165 starts idling. More specifically, when the one-way clutch 165 idles around the cam rotation shaft 163, the cam 161 can freely rotate.

  Further, as the cam 161 continues to rotate in one direction (arrow A direction), the pin 151 provided on the cam 161 moves within the curved region T (see arrow D in FIG. 11A). ). Here, when moving in the curved region T as described above, the pin 151 does not move the link guide 149.

The cam 161 provided with a resistance force by the leaf spring 162 provided in contact with the outer periphery of the cam 161 continues to rotate while receiving the resistance force, and then the near point arrangement angle (see FIG. 11B). ) To stop. More specifically, the cam 161 stops at a position where the pin 151 is at the center of the curved region T.
Here, even if the stop position of the cam 161 is a position deviated from a predetermined position (the central portion of the curved region T), if the pin 151 is within the curved region T, the link guide is supported. The member 147 is disposed at the near point. Therefore, if the pin 151 stops in the curved region T, the sub paddle 126 stops at the position closest to the recording material loaded on the compilation stacking portion 124 (see FIG. 4). Therefore, even when the stop position of the cam 161 varies, the variation in the position where the sub paddle 126 stops is suppressed.

  When the variation in the position of the sub paddle 126 with respect to the recording material is suppressed (the position is stabilized), for example, as shown in FIG. 4, the angle and area at which the recording material contact portion 126a of the sub paddle 126 contacts the recording material is constant. It becomes. As a result, variations in the conveyance force with which the sub paddle 126 conveys the recording material are suppressed. Therefore, for example, it is possible to prevent the end faces of the recording materials to be aligned from becoming uneven when the sub paddle 126 pushes the recording material toward the end guide 124 b of the compilation stacking unit 124.

  Heretofore, a solenoid has been used to move the sub-paddle 126 between a position where it contacts the recording material and a position where it does not contact. When the solenoid is used, the stop position of the sub paddle 126 may vary. Therefore, the support member that supports the sub-paddle 126 is abutted against other members provided around the stop position, thereby suppressing variations in the stop position of the sub-paddle 126. However, in this case, since the members collide with each other, a collision sound (contact sound) is generated. Furthermore, for example, when a recording material is processed at a high speed, the collision sound becomes large.

  On the other hand, in the present embodiment, by arranging the pin 151 in the space inside the link guide 149, the state where the pin 151 and the link guide 149 are in contact with each other is maintained. Therefore, the pin 151 and the link guide 149 are not separated once and collide again, and the occurrence of a collision sound is suppressed.

Further, unlike the present embodiment, when the stepping motor 169 is stopped and the cam 161 is stopped suddenly, for example, each member constituting the drive mechanism 160 may collide with each other to generate a sound. In particular, when the stepping motor 169 rotates at a high speed, this noise increases.
On the other hand, in the present embodiment, as described above, the one-way clutch 165 is disconnected from the drive system, so that the cam 161 is prevented from suddenly stopping and slowly decelerated. As a result, it is possible to suppress the sound generated when the cam 161 stops.

  Further, the deceleration of the cam 161 in the present embodiment can be adjusted by a leaf spring 162 that contacts the outer periphery of the cam 161. More specifically, by adjusting the leaf spring 162, the time until the cam 161 stops after the driving force by the cam 161 is cut off, the rotation angle, and the like can be adjusted. For example, when it is desired to stop the cam 161 earlier, the leaf spring 162 is brought into contact with the outer periphery of the cam 161 more strongly. Alternatively, when it is desired to continue rotating the cam 161 for a longer period, that is, when it is desired to allow the cam 161 to slide longer, the leaf spring 162 is weakly brought into contact with the outer periphery of the cam 161. Note that the one-way clutch 165 and the leaf spring 162 of the present embodiment can be regarded as a deceleration buffer mechanism.

<Other configuration example 1>
Next, another configuration example 1 will be described with reference to FIG. Here, FIG. 13 is a diagram detailing the configuration around the pin 151 in another configuration example 1. FIG.
In the above example, the link guide 149 has been described as a horizontally long annular member. However, if the link guide 149 and the pin 151 are kept in contact with each other and the pin 151 does not move the link guide 149 even if the pin 151 rotates around the cam rotation shaft 163, this is not necessary. It is not limited to.

  For example, as shown in FIG. 13, you may comprise as the link guide 1490 formed in the substantially U shape. A part of the inner surface of the link guide 1490 is formed by two first planes 1491 and a first curved surface 1495 sandwiched between the first planes 1491. The first curved surface 1495 has the same shape as the above-described first curved surface 1495 shown in FIG. In this example, a spring 1497 that presses the link guide support member 147 that supports the link guide 1490 toward the cam rotation shaft 163 of the cam 161 is provided.

  In this example, unlike the above-described example, a member facing the first flat surface 1491 and the first curved surface 1495 is not formed. However, the spring 1497 presses the link guide support member 147 toward the cam rotation shaft 163 of the cam 161, so that the contact between the link guide 1490 and the pin 151 is maintained even when the cam 161 rotates.

<Other configuration example 2>
Next, another configuration example will be described with reference to FIGS. 14 and 15. Here, FIG. 14 is a diagram detailing the configuration around the pin 151 in another configuration example 2. FIG. FIG. 15 is a diagram detailing the configuration around the disc brake 1620 in another configuration example 2. Note that the device frame 181 is not shown in FIG.
In the above-described example, the leaf spring 162 that applies a resistance force to the cam 161 when the cam 161 rotates has been described. However, the present invention is not limited to this as long as the cam 161 rotates with a resistance force.

For example, as shown in FIG. 14, a disc brake 1620 that contacts a flat portion of the cam 161 that is a plate-like cam that rotates together with the cam rotation shaft 163 may be disposed. In FIG. 14, a mechanism (not shown) for driving the cam rotation shaft 163 is formed on the back side of the apparatus frame 181.
Here, as shown in FIG. 15, the disc brake 1620 has a disk portion 1623 disposed around the cam rotation shaft 163. The disk portion 1623 is fixedly supported by a device frame 181 (see FIG. 14). The disc brake 1620 is provided between the disk portion 1623 and the device frame 181 (see FIG. 14), and has a biasing spring 1625 that presses the flat surface of the disk portion 1623 against the flat surface of the cam 161. In the illustrated example, the urging spring 1625 is disposed around the cam rotation shaft 163.

  By causing friction between the flat surface of the disk portion 1623 and the flat surface of the cam 161, a resistance force is applied to the cam 161. For example, by changing the spring constant of the urging spring 1625, the rotation angle and time until the rotating cam 161 stops can be adjusted.

  In the above example, the sub-paddle 126 is used as the member for conveying the recording material. However, the member is not limited to the sub-paddle 126 as long as it is a member that is in contact with the recording material and that movably supports the position in contact with the recording material and the position retracted from the recording material. For example, it may be an eject roll 128, a tamper for aligning a bundle of recording materials, or a conveyance roll for conveying the recording material.

DESCRIPTION OF SYMBOLS 1 ... Image forming system, 2 ... Image forming apparatus, 3 ... Post-processing apparatus, 126 ... Sub paddle, 141 ... Sub paddle support shaft, 147 ... Link guide support member, 149 ... Link guide, 151 ... Pin, 161 ... Cam, 162 ... Leaf spring, 165 ... one-way clutch, 200 ... control unit, S ... straight line region, T ... curved region

Claims (4)

A recording material conveying member that conveys the recording material and moves between a conveying position that conveys the recording material and a separation position that is further away from the conveying path of the recording material than the conveying position;
A rotating member that is driven to rotate and moves the recording material conveying member;
An eccentric member provided on the rotating member at a position eccentric from the rotation center of the rotating member and rotating together with the rotating member;
The recording material conveying member has a contact area that supports the recording material conveying member and is in contact with the eccentric member, and the contact area contacts the eccentric member that rotates. A moving member having a specific region that is moved along the moving direction of the eccentric member that is a part of the contact region and rotates ,
With
The post-processing apparatus, wherein the recording material conveying member is disposed at the conveying position when the specific area of the moving member is in contact with the eccentric member . A driving source for supplying a driving force for rotating the rotating member;
A drive transmission mechanism that rotates the rotating member in one direction when receiving a driving force from the driving source and that does not prevent the rotating member from rotating in the one direction when receiving no driving force from the driving source. The post-processing apparatus according to claim 1, further comprising: Said rotating member and in contact with provided post-processing apparatus according to claim 1 or 2, wherein the having the moderator member for decelerating the rotating member. An image forming mechanism for forming an image on a recording material;
A recording material conveying member that conveys a recording material on which an image is formed by the image forming mechanism and moves between a conveying position that conveys the recording material and a separated position that is further away from the conveying path of the recording material than the conveying position. When,
A rotating member that is driven to rotate and moves the recording material conveying member;
An eccentric member provided on the rotating member at a position eccentric from the rotation center of the rotating member and rotating together with the rotating member;
The recording material conveying member has a contact area that supports the recording material conveying member and is in contact with the eccentric member, and the contact area contacts the eccentric member that rotates. A moving member having a specific region that is moved along the moving direction of the eccentric member that is a part of the contact region and rotates ,
With
The image forming apparatus, wherein the recording material conveying member is disposed at the conveying position when the specific area of the moving member is in contact with the eccentric member .

Images