JP2013063832A - Post processing device and image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise generated when an alignment member moves.SOLUTION: This post processing device (U3) includes a drive control means (C17A) moving an alignment member (12) at acceleration a satisfying a≤(g×L)/h, where g is the gravity acceleration component, in a surface along a stacking surface (7a), L is the distance from one guided part (96a) to the center (12a) of gravity in the direction perpendicular to the direction of the gravity acting on the center (12a) of gravity of the alignment member (12), h is the distance between the one guided member (96a) and a contact position (P1) between a transmission member (99) and a transmitted part (97) in the direction of the force acting at the contact position (P1) during the driving of the transmission member (99), and a is the acceleration during the movement of the alignment member (12).

Description

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

A technique described in Patent Document 1 below is known regarding a post-processing apparatus that performs alignment processing for aligning edges in the width direction on a medium on which an image has been recorded and a binding process for binding with a needle.
In Japanese Patent Laid-Open No. 2003-2519 as Patent Document 1, two pairs of tampers (21, 22) are provided in tamper-regulating grooves (31, 32) formed in the intermediate tray (3) and extending in the sheet width direction. Each tamper (21, 22) is supported by a pin-like member and is driven by a drive motor (55, 56) via a rack (51, 52) and a pinion (53, 54). Have been described.

Japanese Patent Laying-Open No. 2003-2519 (“0018”, FIG. 9)

  This invention makes it a technical subject to reduce the noise which generate | occur | produces when an alignment member moves.

In order to solve the technical problem, the post-processing device according to the first aspect of the present invention provides:
A loading portion on which one end side has a loading surface inclined downward in the direction of gravity with respect to the other end side, and a medium is loaded thereon;
An alignment member disposed at an end in the width direction of the medium loaded on the stacking portion, supported so as to be movable along the width direction, and aligning the medium by contacting the end in the width direction of the medium; ,
A guide portion for guiding the alignment member along the width direction;
A guided portion that is provided on the alignment member and is guided in contact with the guiding portion;
A transmitted portion provided to the alignment member and to which a moving force for moving the alignment member in the width direction is transmitted;
A transmission member that transmits drive to the transmitted portion;
A drive source for driving the transmission member;
Drive control means for controlling the drive source, wherein a gravitational acceleration component is defined as g in a plane along the loading surface, and one of the directions is perpendicular to the direction of gravity acting on the center of gravity of the alignment member. The distance from the guided portion to the center of gravity is L, and the one guided member and the one guided member with respect to the direction of the force acting when the transmitting member is driven at the contact position between the transmitting member and the transmitted portion The drive control means for moving the alignment member at an acceleration a satisfying a ≦ (g × L) / h, where h is a distance from the contact position and a is an acceleration when the alignment member is moved. ,
It is provided with.

In order to solve the technical problem, a post-processing apparatus according to claim 2 is provided.
A loading portion on which one end side has a loading surface inclined downward in the direction of gravity with respect to the other end side, and a medium is loaded thereon;
An alignment member disposed at an end in the width direction of the medium loaded on the stacking portion, supported so as to be movable along the width direction, and aligning the medium by contacting the end in the width direction of the medium; ,
A guide portion for guiding the alignment member along the width direction;
A guided portion that is provided on the alignment member and is guided in contact with the guiding portion;
A transmitted portion provided to the alignment member and to which a moving force for moving the alignment member in the width direction is transmitted;
A transmission member that transmits drive to the transmitted portion;
A drive source for driving the transmission member;
At least one biasing member that biases the alignment member in a direction in which the guided portion approaches the guide portion; and
Drive control means for controlling the drive source, wherein a gravitational acceleration component is defined as g in a plane along the loading surface, and one of the directions is perpendicular to the direction of gravity acting on the center of gravity of the alignment member. The distance from the guided portion to the center of gravity is L, and the one guided member and the one guided member with respect to the direction of the force acting when the transmitting member is driven at the contact position between the transmitting member and the transmitted portion The distance from the contact position is h, the acceleration when the alignment member is moved is a, the total moment around the one guided member acting by the urging force of the urging member is Mt, The drive control means for moving the alignment member at an acceleration a that satisfies a ≦ (g × L) / h + Mt / (M × h) when the mass is M;
It is provided with.

The invention according to claim 3 is the post-processing apparatus according to claim 1 or 2,
The transmitted portion configured by teeth formed along the width direction;
The transmission member configured by a gear meshing with the teeth;
It is provided with.

In order to solve the technical problem, an image forming apparatus according to a fourth aspect of the present invention provides:
An image recording unit for recording an image on a medium;
The post-processing device according to any one of claims 1 to 3, wherein post-processing is performed on the medium on which an image is recorded;
It is provided with.

According to the first, second, and fourth aspects of the present invention, noise generated when the alignment member moves can be reduced as compared with the case where the configuration of the present invention is not provided.
According to the third aspect of the present invention, the guide member can be moved by rotating the gear.

FIG. 1 is an overall explanatory view of an image forming apparatus according to Embodiment 1 of the present invention. FIG. 2 is an enlarged explanatory view of a main part of the image forming apparatus according to the first embodiment. FIG. 3 is an enlarged view of the post-processing apparatus according to the first embodiment of the present invention, and is an explanatory view showing the vertical movement of the discharge clamp roller. FIG. 4 is an enlarged view of the post-processing apparatus according to the first embodiment of the present invention, and is an explanatory view showing the vertical movement of the sub paddle. FIG. 5 is an enlarged view of a main part of the post-processing apparatus according to the first embodiment of the present invention. FIG. 6 is an explanatory diagram of a main part of the rear end portion of the compile tray according to the first embodiment. 7 is a cross-sectional view taken along line VII-VII in FIG. 8A and 8B are explanatory diagrams of the tamper according to the first embodiment. FIG. 8A is a view seen from above, and FIG. 8B is a view seen from below. FIG. 9 is a block diagram illustrating the functions of the control unit of the image forming apparatus according to the first exemplary embodiment. FIG. 10 is a block diagram subsequent to FIG. FIG. 11 is an explanatory diagram of forces and moments acting on the tamper according to the first embodiment. FIG. 12 is an explanatory diagram of forces and moments acting on the moving staple unit of the first embodiment. 13A and 13B are explanatory views of the operation of the tamper according to the first embodiment. FIG. 13A is an explanatory view showing a state where the outer guided roller floats when the acceleration is too large. FIG. 13B is an inner guided view when the acceleration is too large. It is explanatory drawing of the state where the roller floated. 14A and 14B are diagrams for explaining the operation of the moving staple unit according to the first embodiment. FIG. 14A is a diagram illustrating a state in which the rear roller floats when the acceleration is excessively large. FIG. It is explanatory drawing of the state which floated. FIG. 15 is an explanatory diagram of the moving staple unit according to the second embodiment and corresponds to FIG. 5 according to the first embodiment. FIG. 16 is an explanatory diagram of the tamper according to the second embodiment and corresponds to FIG. 8B according to the first embodiment. FIG. 17 is an explanatory diagram of forces and moments acting on the tamper according to the second embodiment, and corresponds to FIG. 11 according to the first embodiment. FIG. 18 is an explanatory diagram of forces and moments acting on the moving staple unit of the second embodiment and corresponds to FIG. 12 of the first embodiment.

Next, specific examples of embodiments of the present invention (hereinafter referred to as examples) will be described with reference to the drawings, but the present invention is not limited to the following examples.
In order to facilitate understanding of the following description, in the drawings, the front-rear direction is the X-axis direction, the left-right direction is the Y-axis direction, the up-down direction is the Z-axis direction, and arrows X, -X, Y, -Y, The direction indicated by Z and -Z or the indicated side is defined as the front side, the rear side, the right side, the left side, the upper side, the lower side, or the front side, the rear side, the right side, the left side, the upper side, and the lower side, respectively.
In the figure, “•” in “○” means an arrow heading from the back of the page to the front, and “×” in “○” is the front of the page. It means an arrow pointing from the back to the back.
In the following description using the drawings, illustrations other than members necessary for the description are omitted as appropriate for easy understanding.

FIG. 1 is an overall explanatory view of an image forming apparatus according to Embodiment 1 of the present invention.
In FIG. 1, a printer U as an example of an image forming apparatus according to a first embodiment of the present invention includes a printer main body U1 as an example of an apparatus main body. Image information transmitted from an information processing apparatus PC as an example of an image information transmitting apparatus electrically connected to the printer U is input to the control unit C. The image information input to the control unit C is converted into yellow Y, magenta M, cyan C, and black K image information for forming a latent image at a preset time, and is output to the latent image forming circuit DL. .
When the original image is a single color image, so-called monochrome, image information of only black K is input to the latent image forming circuit DL.
The latent image forming circuit DL has driving circuits for respective colors Y, M, C, and K (not shown), and a signal corresponding to the input image information is arranged for each color at a preset time. Output to the latent image forming apparatuses LHy, LHm, LHc, and LHk.

FIG. 2 is an enlarged explanatory view of a main part of the image forming apparatus according to the first embodiment.
1 and 2, the Y, M, C, and K latent image writing lights emitted from the latent image writing light sources of the latent image forming apparatuses LHy to LHk respectively rotate as an example of an image carrier. The light enters the photoconductors PRy, PRm, PRc, and PRk. In Example 1, each of the latent image forming apparatuses LHy to LHk is configured by a so-called LED array in which LEDs as an example of light emitting elements are linearly arranged along the width direction of an image.
Around each of the photoconductors PRy, PRm, PRc, and PRk, along the rotation direction, chargers CRy, CRm, CRc, and CRk, latent image forming devices LHy, LHm, LHc, and LHk, and developing devices Gy, Gm, and Gc , Gk, primary transfer units T1y, T1m, T1c, T1k, and photoreceptor cleaners CLy, CLm, CLc, CLk as an example of a cleaning unit are arranged.

1 and 2, the photoconductors PRy, PRm, PRc, and PRk are charged by their respective chargers CRy, CRm, CRc, and CRk, and then at the image writing positions Q1y, Q1m, Q1c, and Q1k. An electrostatic latent image is formed on the surface of the latent image writing light. The electrostatic latent images on the surfaces of the photoconductors PRy, PRm, PRc, and PRk are developed in the developing regions Q2y, Q2m, Q2c, and Q2k, and a developing roll GRy as an example of a developer holding member of the developing devices Gy, Gm, Gc, and Gk. , GRm, GRc, and GRk are developed into a toner image as an example of a visible image.
The developed toner image is conveyed to primary transfer regions Q3y, Q3m, Q3c, and Q3k that are in contact with an intermediate transfer belt B as an example of an intermediate transfer member. The primary transfer units T1y, T1m, T1c, and T1k disposed on the back side of the intermediate transfer belt B in the primary transfer regions Q3y, Q3m, Q3c, and Q3k are preliminarily supplied from the power supply circuit E controlled by the control unit C. At the set time, a primary transfer voltage having a polarity opposite to the charging polarity of the toner is applied.

The toner images on the photoreceptors PRy to PRk are primarily transferred to the intermediate transfer belt B by the primary transfer units T1y, T1m, T1c, and T1k. Residues and deposits on the surface of the photoreceptors PRy, PRm, PRc, and PRk after the primary transfer are cleaned by the photoreceptor cleaners CLy, CLm, CLc, and CLk. The cleaned surfaces of the photoreceptors PRy, PRm, PRc, and PRk are recharged by the chargers CRy, CRm, CRc, and CRk.
In Example 1, a toner image as an example of a visible image is formed by the Y-color photoconductor PRy, the charger CRy, the latent image forming device LHy, the developing device Gy, the primary transfer device T1y, and the photoconductor cleaner CLy. A Y-color visible image forming apparatus Uy is configured. Similarly, the photosensitive members PRm, PRc, PRk, chargers CRm, CRc, CRk, latent image forming devices LHm, LHc, LHk, developing devices Gm, Gc, Gk, primary transfer devices T1m, T1c, T1k, and photosensitive members. The M, C, and K color visible image forming apparatuses Um, Uc, and Uk are configured by the cleaners CLm, CLc, and CLk.

  Above the photoreceptors PRy to PRk, a belt module BM as an example of an intermediate transfer device that can move up and down and can be pulled out forward is disposed. The belt module BM includes the intermediate transfer belt B, a belt driving roll Rd as an example of a driving member, a tension roll Rt as an example of a stretching member, a walking roll Rw as an example of a meandering prevention member, and an example of a driven member. And an idler roll Rf and a backup roll T2a as an example of a secondary transfer counter member, and the primary transfer units T1y, T1m, T1c, and T1k. The intermediate transfer belt B is rotatably supported by the rolls Rd, Rt, Rw, Rf, T2a.

A secondary transfer roll T2b as an example of a secondary transfer member is disposed at a position facing the backup roll T2a with the intermediate transfer belt B interposed therebetween. The backup roll T2a and the secondary transfer roll T2b are used in the first embodiment. The secondary transfer device T2 is configured. Further, the secondary transfer region Q4 is formed by the region where the secondary transfer roll T2b and the intermediate transfer belt B are in contact with each other.
The single-color or multi-color toner images transferred onto the intermediate transfer belt B by the primary transfer units T1y, T1m, T1c, and T1k in the primary transfer regions Q3y, Q3m, Q3c, and Q3k It is conveyed to the secondary transfer area Q4.
The primary transfer units T1y to T1k, the intermediate transfer belt B, the secondary transfer unit T2, and the like constitute a transfer device T1 + T2 + B according to the first exemplary embodiment. Further, the visible image forming devices Uy to Uk and the transfer device T1 + T2 + B constitute an image recording unit Uy to Uk + T1 + T2 + B according to the first embodiment.

In FIG. 1, a pair of left and right guide rails GR as an example of a guide member is provided below the visible image forming devices Uy to Uk, and the guide rail GR is an example of a paper feed container. The paper feed trays TR1 to TR4 are supported so as to be able to enter and exit in the front-rear direction. The recording sheet S as an example of a medium accommodated in the paper feed trays TR1 to TR4 is an example of a conveying member, and is taken out by a pickup roll Rp as an example of a take-out member, and a separation roll Rs as an example of a separating member. Are separated one by one. The recording sheet S is transported by a plurality of transport rolls Ra as an example of a transport member along a paper feed path SH1 which is an example of a medium transport path, and is arranged upstream of the secondary transfer region Q4 in the sheet transport direction. Is sent to a registration roll Rr as an example of an adjusted medium conveyance timing adjustment member.
The pickup roll Rp, the separating roll Rs, and the like constitute the paper feeding device Rp + Rs of the first embodiment.
Further, a manual feed tray TR0 as an example of a manual feed unit is installed on the right side of the uppermost sheet feed tray TR1. The recording sheet S supported by the manual feed tray TR0 is fed by a manual feed roll Rp0 as an example of a manual feed member, conveyed through the manual feed path SH0, and sent to the registration roll Rr.

The registration roll Rr uses the recording sheet S as an example of a conveyance path on the downstream side of the sheet feeding path SH1 in time for the toner image formed on the intermediate transfer belt B to be conveyed to the secondary transfer area Q4. Is conveyed to the main conveyance path SH2, and the recording sheet S is conveyed to the secondary transfer region Q4. When the recording sheet S passes through the secondary transfer region Q4, the backup roll T2a is grounded, and the secondary transfer unit T2b is supplied with a polarity opposite to the toner charging polarity from the power supply circuit E controlled by the control unit C. A secondary transfer voltage is applied, and the toner image on the intermediate transfer belt B is transferred from the intermediate transfer belt B to the recording sheet S.
The intermediate transfer belt B after the secondary transfer is cleaned by a belt cleaner CLb as an example of an intermediate transfer body cleaner.

The recording sheet S on which the toner image is secondarily transferred is placed on a fixing region Q5 which is a contact region of a heating roll Fh as an example of a heating fixing member of a fixing device F and a pressure roll Fp as an example of a pressure fixing member. It is conveyed and fixed by heating when passing through the fixing area Q5. Note that a release agent for improving the releasability of the recording sheet S from the heating roll is applied to the surface of the heating roll Fh by a release agent application device Fa.
A discharge path as an example of a conveyance path that conveys the recording sheet S toward a discharge tray TRh as an example of a discharge medium stacking unit of the printer body U1 above the downstream side in the conveyance direction of the fixing device F. SH3 is arranged. Therefore, when the recording sheet S is transported toward the paper discharge tray TRh, the fixed recording sheet S is transported through the paper discharge path SH3, and is sent from the sheet discharge port SH3a as an example of the medium discharge port to the printer. The paper is discharged by a paper discharge roll Rh as an example of a discharge member of the main body U1.

In FIG. 1, in the first embodiment, a lower cover U1a as an example of an upstream opening member is located on the right side of the lower three-stage sheet feeding trays TR2 to TR4, and a normal position indicated by a solid line in FIG. 1 is supported so as to be openable and closable with respect to an open position indicated by a broken line in FIG. The lower cover U1a supports a guide on the right side of the paper feed path SH1 on the right side of the paper feed trays TR2 to TR4, a so-called guide, and the outside of the pair of transport rolls Ra. Therefore, by moving the lower cover U1a to the open position, the lower portion of the sheet feed path SH1, that is, the upstream sheet feed path SH1a on the upstream side in the transport direction is opened, and the jammed medium can be removed.
Each of the transport paths SH0 to SH3 constitutes a transport path SH of Embodiment 1. The medium transport system SH + Ra to the transport path SH, the sheet feeding device Rp + Rs, the sheet transport roll Ra, the registration roll Rr, the paper discharge roll Rh, and the like. Rh is configured.

(Description of sheet conveying unit U2)
In FIG. 1, the printer U according to the first exemplary embodiment includes a sheet transport unit U2 as an example of a medium transport unit that is detachably mounted on the paper discharge tray TRh. The sheet conveying unit U2 is provided with a carry-in port 1 through which the recording sheet S discharged from the paper discharge roll Rh is carried on one side connected to the sheet discharge port SH3a of the printer main body U1. The recording sheet S carried in from the carry-in entrance 1 is conveyed through a communication conveyance path SH5 as an example of a conveyance path by a communication conveyance roll Ra2 as an example of a medium conveyance member arranged inside the sheet conveyance unit U2. The recording sheet S conveyed through the communication conveyance path SH5 is discharged from the discharge port 2 for the post-processing device formed on the other side surface of the sheet conveyance unit U2.

(Description of post-processing device U3)
FIG. 3 is an enlarged view of the post-processing apparatus according to the first embodiment of the present invention, and is an explanatory view showing the vertical movement of the discharge clamp roller.
FIG. 4 is an enlarged view of the post-processing apparatus according to the first embodiment of the present invention, and is an explanatory view showing the vertical movement of the sub paddle.
FIG. 5 is an enlarged view of a main part of the post-processing apparatus according to the first embodiment of the present invention.
1, 3, and 4, the printer U according to the first exemplary embodiment is removably supported on the side surface of the printer main body U <b> 1, connected to the sheet conveyance unit U <b> 2, and discharged from the sheet discharge port 2. The sheet S includes a post-processing device U3 that performs post-processing such as stapling and alignment as an example of edge binding.

1 and 3 to 5, the post-processing device U <b> 3 according to the first embodiment includes a right side wall U <b> 3 a as an example of a side wall surface of the image forming apparatus main body that is disposed to face the left side wall U <b> 1 b of the printer main body U <b> 1. A sheet carry-in port 3 as an example of a post-processing device carry-in port connected to the sheet discharge port 2 is formed in the upper part of the right side wall U3a. A pair of front and rear hooks U3a1 projecting rightward and extending downward are formed at the center in the vertical direction of the right side wall U3a. The hook portion U3a1 is fitted in a support hole U1b1 formed in the left side wall U1b of the printer body U1, and is hooked on the printer body U1. As a result, the post-processing device U3 is supported by the printer main body U1, the right side wall U3a of the post-processing device U3 is held along the left side wall U1b of the printer main body U1, and the sheet carry-in port 3 is a sheet transport unit. It is held in a state connected to the sheet discharge port 2 of U2.
Accordingly, when the recording sheet S is discharged from the sheet discharge port 2 of the sheet conveyance unit U2, it is carried into the sheet carry-in port 3 of the post-processing device U3.

(Explanation of compilation discharge roll)
In FIG. 1, the recording sheet S carried into the sheet carry-in port 3 is moved by a post-processing device U3 by a post-processing carry-in roll Ra3 as an example of a conveying member of the post-processing device U3 provided on the downstream side of the sheet carry-in port 3. It is conveyed through the inner post-processing conveyance path SH6. The recording sheet S conveyed on the post-processing conveyance path SH6 is used as an example of a first stacking unit by a compile discharge roll 4 as an example of a first discharge member provided at the downstream end of the post-processing conveyance path SH6. To the compile tray 6. The compile discharge roll 4 according to the first embodiment is rotated and stopped by the drive from the roll drive motor MA1 as an example of the drive source. In the first embodiment, as the roll drive motor MA1 that drives the post-processing carry-in roll Ra3 and the compilation discharge roll 4, a stepping that rotates at a preset angle each time a pulse signal as an example of a preset input signal is input. Although the motor is used, it is not limited to this, For example, it is also possible to use conventionally well-known motors, such as DC motor.
A compile discharge sensor SN1 as an example of a medium detection member is disposed in the vicinity of the upstream of the compile discharge roll 4, and the recording sheet S is detected in the post-processing conveyance path SH6.

(Explanation of compilation tray)
1 and 3 to 5, the compile tray 6 includes a compile tray main body 7 as an example of a first stacking unit main body. In FIG. 1, the compile tray main body 7 is disposed so as to be inclined with respect to the horizontal and the left part is higher than the right part.
3 to 5, an end wall 8 extending upward is supported at the right end of the compile tray body 7 as an example of an end aligning member. Accordingly, the right end, which is one end of the recording sheets S discharged from the compile discharge roll 4 and stacked on the compile tray main body 7 is abutted against the end wall 8 so that the right ends of the bundle of recording sheets S are aligned.
A guide wall 9 is formed at the upper end of the end wall 8 as an example of a guide portion. The guide wall 9 increases in distance from the stacking surface 7a of the compile tray 7 as the distance from the end wall 8 increases. The guide wall 9 is recorded when the right end of the recording sheet S moving toward the end wall 8, that is, the upstream end in the medium discharge direction, which is the medium discharge direction, is curved, so-called curled. The upstream end of the sheet S is guided to the end wall 8.

(Description of main paddle)
A main paddle 11 as an example of a second aligning and conveying member is rotatably supported on the upper left side of the guide wall 9. The main paddle 11 is an example of a rotating shaft 11a to which driving is transmitted from a paddle driving motor MA6 as an example of a driving source, and a rotating body that is arranged in plural along the rotating shaft 11a at a predetermined interval. And a cylindrical roll portion 11b. The main paddle 11 according to the first embodiment is driven by a stepping motor, similarly to the compile discharge roller 4.
On the outer peripheral surface of the roll portion 11b, three plate-shaped paddle main bodies 11c having flexibility as an example of the conveying member main body are supported with a preset phase interval. The paddle body 11c according to the first embodiment extends in a tangential direction from the outer peripheral surface of the roll portion 11b toward the upstream side in the direction in which the recording sheet S moves toward the end wall 8, and the outer end of the paddle body 11c. Is formed in such a length that it can come into contact with the stacking surface 7a of the compile tray main body 7.
Therefore, by rotating the main paddle 11, the paddle body 11 c can come into contact with the uppermost surface of the recording sheets S stacked on the compilation tray 6. Therefore, the stacked recording sheets S are conveyed toward the end wall 8 by the main paddle 11, and the right end of the recording sheet S is abutted against the end wall 8 and aligned.

(Description of tamper)
On the left side of the compile tray 6, as an example of a width end aligning member, a tamper 12 that contacts the end in the width direction of the recording sheets S stacked on the compile tray 6 and aligns the end in the width direction of the recording sheets S is provided. A pair of front and rear are arranged.
The detailed configuration of the tamper 12 will be described later.

(Description of stapler)
3 to 5, a stapler 13 as an example of a binding member is installed diagonally to the right of the compile tray 6. The stapler 13 binds the bundle of recording sheets S stacked and aligned on the compile tray 6 with a staple needle as an example of a binding needle.
The detailed configuration of the stapler 13 will be described later.

(Description of stacker discharge roll)
3 to 5, a stacker discharge roll 16 as an example of a second discharge member is arranged on the downstream side of the compile tray main body 7 in the medium discharge direction, that is, on the left side. The stacker discharge roll 16 is supported at a preset interval along the rotary shaft 16a and a rotary shaft 16a to which driving from a stacker discharge motor MA2 capable of forward and reverse rotation as an example of a drive source is transmitted. And a roll body 16b as an example of the rotating portion, and rotate forward and backward as the stacker discharge motor MA2 rotates forward and backward. The stacker discharge roll 16 according to the first embodiment is driven by a stepping motor in the same manner as the compilation discharge roll 4 and the like.
Accordingly, the stacker discharge roll 16 according to the first exemplary embodiment stacks the recording sheets S stacked on the compile tray 6 and subjected to post-processing such as alignment and stapling when rotating forward and backward, as a stacker tray as an example of a second stacking unit. While being discharged to TH1, the recording sheet S discharged to the compilation tray 6 is moved toward the end wall 8 during reverse rotation.

(Description of shelf)
In FIG. 5, in the vicinity of the stacker discharge roll 16, a shelf 17 as an example of an extension member is disposed between the rotation shaft 16 a of the stacker discharge roll 16 and the lower surface of the compile tray main body 7.
In FIG. 5, the shelf 17 has a plate-shaped shelf body 17a curved in an arc shape as an example of an extension portion main body, and an arc-shaped rack gear as an example of a transmitted portion on the lower surface of the shelf body 17a. 17b is formed. The rack gear 17b meshes with a shelf drive gear 18 disposed below the rotation shaft 16a of the stacker discharge roll 16. Drive is transmitted to the shelf drive gear 18 from a shelf drive motor MA3 capable of forward and reverse rotation as an example of a drive source to be described later, and a recording sheet indicated by a solid line in FIG. The shelf 17 moves between an extended position capable of supporting the lower surface of S and a storage position stored in the post-processing device U3 indicated by a broken line in FIG.
The discharge roll 16 and the shelf 17 are conventionally known. For example, JP 2006-69746 A, JP 2006-69749 A, JP 2011-88682 A, JP 2011-88683 A, etc. Since various well-known configurations described in (1) can be adopted, detailed description thereof will be omitted.

(Description of the clamp roll 21)
In FIG. 3, a clamp roll 21 corresponding to the stacker discharge roll 16 is disposed above the compile tray main body 7 as an example of a discharge driven member. As an example of an arm member, the clamp roll 21 is supported at a tip end portion of a clamp arm 22 supported so as to be rotatable about a rotation shaft 22a, and the clamp roll 21 is stacked as the clamp arm 22 rotates. A rising position as an example of a separation position shown by a solid line in FIG. 3 that is separated from the discharge roll 16 and a broken line in FIG. 3 that the clamp roll 21 approaches the stacker discharge roll 16 and contacts the recording sheet S to sandwich the recording sheet S It is supported so as to be movable between a lowered position as an example of a contact position indicated by.

(Description of sub-paddle 23)
In FIG. 4, a sub paddle 23 as an example of a first aligning and conveying member is disposed at a position shifted in the front-rear direction of the clamp roll 21. Note that a plurality of sub-paddles 23 according to the first embodiment are arranged at predetermined intervals in the front-rear direction and have the same configuration as the main paddle 11, and thus detailed description thereof is omitted. As an example of an arm member, the sub-paddle 23 is supported at a tip end portion of a paddle arm 24 that is supported so as to be rotatable about a rotation shaft 24 a. As the paddle arm 24 rotates, the loading surface 7 a of the compilation tray 6 is supported. 4 and the standby position indicated by the solid line in FIG. 4 where the sub-paddle 23 is lifted away, and the sub-paddle 23 descends and approaches the stacking surface 7a of the compile tray 6, and the recording sheet S on the compile tray 6 is moved to the end wall 8 side. It is supported so as to be movable between a retracted position indicated by a broken line in FIG.
The raising / lowering mechanism of the clamp roll 21 and the sub paddle 23 and the driving mechanism of the sub paddle 23 are conventionally known. For example, JP 2006-69727 A, JP 2006-69746 A, and JP 2006-69749 A. Various configurations such as those described in Japanese Patent Publications and the like can be adopted, and thus detailed description thereof is omitted. In the first embodiment, the drive source of the sub-paddle 23 is shared with the paddle drive motor MA6 that is the drive source of the main paddle 11, but may be provided independently.

(Description of stacker tray TH1)
1 and 3 to 5, the left side wall U3b of the post-processing device U3 supports a stacker tray TH1 from which the recording sheets S stacked on the compile tray 6 are discharged as an example of a second stacking unit. Has been. The stacker tray TH1 includes a tray guide 26 that extends in the vertical direction along the left side wall U3b of the post-processing device U3, as an example of a lifting guide portion. A slider 27 as an example of a discharge moving unit is supported on the tray guide 26 so as to be movable up and down along the tray guide 26. A stacker tray main body 28 as an example of a second stacking unit main body is fixedly supported on the slider 27.
The stacker tray TH1 is configured to descend according to the height of the uppermost surface of the bundle of recording sheets S stacked on the upper surface of the stacker tray body 28. Such an elevating mechanism is conventionally known. For example, various structures such as elevating mechanisms described in JP-A-7-3000027 and JP-A-2003-089463 can be adopted. The detailed explanation is omitted.

(Detailed description of stapler)
FIG. 6 is an explanatory diagram of a main part of the rear end portion of the compile tray according to the first embodiment.
5 and 6, a stapler support member 61 as an example of a support member of the binding device is supported on the lower right side of the end wall 8 of the first embodiment. The stapler support member 61 according to the first exemplary embodiment extends in the front-rear direction, which is the width direction of the recording sheet S, along the end wall 8 and is inclined downward toward the right as in the compile tray main body 7. Is formed.
As an example of a guide member of the binding device, the stapler support member 61 is formed with a stapler guide 62 that extends in the front-rear direction and curves in an arc shape inside the front-rear direction at both front-rear ends. A stapler guide groove 62a that extends along the stapler guide 62 and penetrates the stapler guide 62 in the vertical direction is formed at the center in the left-right direction of the stapler guide 62 as an example of a guide member main body of the binding device. Rack teeth 62b as an example of a flat gear are formed on the inner surface on the right side of the stapler guide groove 62a.

5 and 6, the stapler support member 61 is provided with a plate-shaped light shielding rib 63 extending upward and disposed on the right side of the stapler guide 62 as an example of the detected portion. In FIG. 6, the light shielding rib 63 according to the first embodiment is arranged according to the position where the stapler 13 stops, and the stapler 13 according to the first embodiment performs the binding process of the bundle of recording sheets S at the front end corner portion and the center front. It is arranged corresponding to four places of the part, the central rear part, and the rear end corner part. That is, the stapler 13 according to the first embodiment includes a “front end corner binding” for binding the front end corner portion, a “side end binding” for binding the center front portion and the center rear portion, and a “rear end corner binding” for binding the rear end corner portion. Is possible.
As shown in FIG. 6, the front end portion, the central portion, and the rear portion of the right end of the end wall 8 and the compile tray main body 7 are used for binding corresponding to the position where the stapler 13 performs the binding process, so-called stapling process. The notches 6a, 6b and 6c are formed.

(Description of moving binding device)
5 and 6, the stapler support member 61 supports a moving staple unit 66 as an example of a moving binding device. In FIG. 5, the moving staple unit 66 according to the first embodiment includes a plate-shaped carriage 67 that is disposed above the stapler guide 62 as an example of a moving body. Roller support portions 68 and 69 extending downward are formed at both left and right ends of the carriage 67 as an example of support portions for the guided member. A drive connecting portion 68 a extending leftward is formed at the lower end of the left roller support portion 68.
As an example of a guided member, a roller 71 that contacts the upper surface of the stapler support member 61 is rotatably supported by the roller support portions 68 and 69. In FIG. 6, one roller 71 according to the first embodiment is supported by the left roller support portion 68, and a pair of rollers 71 are supported by the right roller support portion 69 at an interval in the front-rear direction.

In FIG. 5, the upper end of a shaft 72 extending downward as an example of a drive shaft is rotatably supported by the carriage 67 corresponding to the stapler guide groove 62a. The shaft 72 supports a stapler moving gear 73 that meshes with the rack teeth 62b as an example of a driving member of the binding device.
Drive is transmitted to the lower end of the shaft 72 from a stapler moving motor 74 as an example of a drive source. The stapler moving motor 74 according to the first embodiment includes a stepping motor as an example of a drive source that rotates at a preset angle every time a pulse as an example of an input signal is input, and is configured to be capable of forward and reverse rotation. Has been.

  The stapler moving motor 74 is supported by a plate-like motor support plate 76 as an example of a drive source support member, and the motor support plate 76 has a connection shaft 77 as an example of a connection member supported at the left end. And is supported by the drive connecting portion 68a. Therefore, the stapler moving motor 74 is supported so as to be movable integrally with the carriage 67 via the motor support plate 76 and the connecting shaft 77. When the stapler moving motor 74 is driven to rotate in the forward and reverse directions, the stapler moving gear 73 that meshes with the rack teeth 62b rotates in the forward and reverse directions, and the carriage 67 moves along the stapler guide groove 62a.

  In FIG. 5, an optical sensor 78 as an example of a detection member is supported on the lower surface of the carriage 67 in correspondence with the position of the light shielding rib 63. In the optical sensor 78 according to the first embodiment, a light emitting unit 78a that outputs light and a light receiving unit 78b that receives light are arranged to face each other, and a light shielding rib 63 is provided between the light emitting unit 78a and the light receiving unit 78b. It is arranged to be able to enter. Therefore, as the carriage 67 moves, when the light shielding rib 63 enters between the light emitting portion 78a and the light receiving portion 78b and the light is blocked, it can be detected that the moving staple unit 66 has moved to the binding position. It is configured.

A stapler motor unit 81 as an example of a binding operation device is supported on the upper surface of the carriage 67, and the stapler 13 is supported on the upper surface of the stapler motor unit 81.
The stapler 13 according to the first embodiment includes a staple launching portion 82a that ejects staple needles as an example of a binding needle, and a staple leading end that is disposed to face the staple launching portion 82a and penetrates a bundle of recording sheets S. A needle folding portion 82b for folding the. The needle launching portion 82a is supported so as to be rotatable about a rotation center 82c with respect to the needle bending portion 82b.
A stapler operating member 83 as an example of a binding operating member is supported between the needle launching portion 82a and the needle bending portion 82b. The stapler operating member 83 has one end 83a connected to the needle launching portion 82a and an annular operated portion 83b formed at the other end.

An eccentric cam 84 as an example of an eccentric member is rotatably supported by the operated portion 83b. A rotating gear 84a of the eccentric cam 84 supports a driven gear 86 (not shown) as an example of a gear, and the driven gear 86 is connected to a stapler motor via an intermediate gear 87 as an example of an intermediate gear. Drive is transmitted from an output gear 88 as an example of an output gear supported by the output shaft 81 a of the unit 81.
Therefore, when the stapler motor unit 81 is operated, the eccentric cam 84 is rotated via the gears 86 to 88, and the one end 83a of the stapler operating member 83 is moved in the vertical direction. Therefore, the needle launching portion 82a approaches the needle folding portion 82b, the bundle of recording sheets S is sandwiched, and the staples are ejected and bound.

The stapler 13 and the members denoted by reference numerals 67 to 88 constitute the moving staple unit 66 of the first embodiment.
In the moving staple unit 66 according to the first embodiment, the stapler 13, the stapler motor unit 81, and the like are disposed on a carriage 67 disposed above the stapler support member 66. Is also upward in the direction of gravity.

(Detailed description of tamper)
7 is a cross-sectional view taken along line VII-VII in FIG.
8A and 8B are explanatory diagrams of the tamper according to the first embodiment. FIG. 8A is a view seen from above, and FIG. 8B is a view seen from below.
6 and 7, the tamper 12 of the first embodiment is supported so as to be movable along a tamper guide groove 91 formed in the compile tray main body 7 and extending in the front-rear direction, as an example of a guide portion of the alignment member. . 6 to 8, the tamper 12 according to the first embodiment includes a plate-like bottom plate portion 92 that extends along the stacking surface 7 a of the compile tray main body 7. A plate-shaped tamper main body 93 extending upward is formed at the outer end in the front-rear direction of the bottom plate portion 92 as an example of the alignment member main body.

  On the bottom portion of the bottom plate portion 92, a guided rod 94 that is formed in a plate shape extending in the front-rear direction and accommodated in the tamper guide groove 91 is supported as an example of a guided member of the alignment member. In FIG. 8B, at both ends in the front-rear direction of the guided rod 94, as an example of a guided portion, a roller-shaped guided roller 96 supported in contact with the inner surface of the tamper guide groove 91 is rotatably supported. Has been. The guided rod 94 has tamper-rack teeth 97 formed on the side surface opposite to the guided roller 96 along the side surface of the guided rod 94 as an example of a transmitted portion.

6 and 7, a pair of front and rear tamper drive motors 98 as an example of a drive source for the alignment member is disposed in the center in the front-rear direction of the lower surface of the compile tray main body 7 corresponding to each tamper 12. In addition, the tamper drive motor 98 of the first embodiment is configured by a stepping motor like the stapler moving motor 74, and is configured to be able to rotate forward and reverse.
A tamper driving gear 99 that meshes with tamper rack teeth 97 is supported on the rotating shaft 98a of the tamper driving motor 98 as an example of a transmission member. Therefore, when the tamper drive motor 98 rotates forward and backward, the tamper 12 moves in the sheet width direction via the tamper drive gear 99 and the tamper rack teeth 97, and the end in the width direction of the recording sheet S on which the tamper body 93 is stacked. Alignment is performed by touching.

(Description of the control part of Example 1)
FIG. 9 is a block diagram illustrating the functions of the control unit of the image forming apparatus according to the first exemplary embodiment.
FIG. 10 is a block diagram subsequent to FIG.
9 and 10, the control unit C of the printer body U1 and the control unit CA of the post-processing device U3 are an input / output interface I / O for inputting / outputting signals to / from the outside, and a program for performing necessary processing ROM in which information and the like are stored: read-only memory, RAM for temporarily storing necessary data: random access memory, CPU for performing processing according to the program stored in the ROM, central processing unit, In addition, a small information processing device having an oscillator or the like, that is, a so-called microcomputer, can realize various functions by executing a program stored in the ROM.

(Signal output element connected to the control unit C of the printer body U1)
The control unit C of the printer main body U1 receives an output signal from a signal output element such as an operation unit UI.
UI: Operation Unit The operation unit UI includes a power button UI1 as an example of a power-on unit, a display unit UI2, a numeric input unit UI3, an arrow input unit UI4, and the like.

(Controlled elements connected to the control unit C of the printer body U1)
The control unit C of the printer main body U1 is connected to a main drive source drive circuit D1, a power supply circuit E, a paper feed device drive circuit D2, a conveying member drive circuit D3, and other control elements (not shown). Is output.
D1: Main drive source drive circuit The main drive source drive circuit D1 rotationally drives the photoreceptors PRy to PRk, the intermediate transfer belt B, and the like via the main drive source M1.
D2: Paper Feed Device Drive Circuit The paper feed device drive circuit D2 drives the paper feed device Rp + Rs via the paper feed drive source M2. D3: Transport Member Drive Circuit The transport member drive circuit D3 drives the transport roll Ra and the paper discharge roll Rh via the transport drive source M3.

E: Power Supply Circuit The power supply circuit E includes a developing power supply circuit Ea, a charging power supply circuit Eb, a transfer power supply circuit Ec, a fixing power supply circuit Ed, and the like.
Ea: Power supply circuit for development The power supply circuit for development Ea applies a development voltage to the development rolls of the development devices Gy to Gk.
Eb: Charging power supply circuit The charging power supply circuit Eb applies charging voltages for charging the surfaces of the photoconductors PRy to PRk to the chargers CRy to CRk, respectively.
Ec: Transfer power supply circuit The transfer power supply circuit Ec applies a transfer voltage to the primary transfer units T1y to T1k and the secondary transfer roll T2b.
Ed: Power supply circuit for fixing The power supply circuit for fixing Ed supplies power for heating the heater to the heating roll Fh of the fixing device F.

(Function of the control unit C of the printer body U1)
The control unit C of the printer main body U1 has a function of executing processing according to an input signal from the signal output element and outputting a control signal to each control element. That is, the control unit C has the following functions.
C1: Image Formation Control Unit The image formation control unit C1 controls the driving of each member of the printer U, the application timing of each voltage, and the like according to the image information input from the information processing apparatus PC, and performs the image formation operation. Run a job. The image information of the first embodiment includes post-processing setting information, “post-processing execution number information”, trays TR0 to TR4 to be used, “no post-processing”, “no binding (only alignment)”, and “with binding”. Used paper storage unit information and the like are included.
C2: Main drive source control means The main drive source control means C2 controls the drive of the main drive source M1 via the main drive source drive circuit D1, and controls the drive of the photoconductors PRy to PRk and the like.

C3: Power supply circuit control means The power supply circuit control means C3 includes a development power supply circuit control means C3A, a charging power supply circuit control means C3B, a transfer power supply circuit control means C3C, and a fixing power supply circuit control means C3D. Then, the operation of the power supply circuit E is controlled to control voltage application and power supply to each member.
C3A: Developing power circuit control means The developing power circuit control means C3A controls the developing power circuit Ea to control the developing voltage applied to the developing rolls of the developing devices Gy to Gk.
C3B: Charging power supply circuit control means The charging power supply circuit control means C3B controls the charging power supply circuit Eb to control the charging voltage applied to the chargers CRy to CRk.

C3C: Transfer power supply circuit control means The transfer power supply circuit control means C3C controls the transfer power supply circuit Ec and applies it to the primary transfer voltage applied to the primary transfer devices T1y to T1k and to the secondary transfer roll T2b. The secondary transfer voltage is controlled.
C3D: Fixing power supply circuit control means The fixing power supply circuit control means C3D controls the temperature of the heater of the heating roll Fh of the fixing device F, that is, controls the fixing temperature, by controlling the fixing power supply circuit Ed.

(Signal output element connected to control unit CA of post-processing device U3)
The control unit CA of the post-processing device U3 receives output signals from signal output elements such as the compilation discharge sensor SN1 and the optical sensor 78.
The compile discharge sensor SN1 detects the recording sheet S carried into the compile tray 6.
The optical sensor 78 detects the light shielding rib 63.

(Controlled element connected to the control unit CA of the post-processing device U3)
The control unit CA of the post-processing device U3 includes a compile discharge roll drive circuit DA1, a stacker discharge roll drive circuit DA2, a shelf operation circuit DA3, a clamp roll lift circuit DA4, a sub paddle lift circuit DA5, a paddle drive circuit DA6, and a tamper drive. The circuit DA7, staple operation circuit DA8, stacker lift circuit DA9, and other control elements (not shown) are connected to output their operation control signals.
DA1: Compilation discharge roll drive circuit The compile conveyance roll drive circuit DA1 as an example of the drive circuit of the first discharge member controls the roll drive motor MA1 of the post-processing device U3, and the compile discharge roll 4 and the post-processing carry-in roll Ra3 is driven.

DA2: Stacker Discharge Roll Drive Circuit A stacker discharge roll drive circuit DA2 as an example of a second discharge member drive circuit controls the rotational drive of the discharge motor MA2 to drive the stacker discharge roll 16.
DA3: Shelf operation circuit The shelf operation circuit DA3 as an example of the operation circuit of the extension member controls the forward / reverse rotation drive of the shelf operation motor MA3 to move the shelf 17 between the storage position and the extension position.
DA4: Clamp Roll Lifting Circuit A clamp roll lifting circuit DA4 as an example of a lifting and lowering circuit for the discharge opposing member controls the forward / reverse rotation of the lifting motor MA4 for lifting and lowering the clamp roll to move the clamp roll 21 to the raised position and the lowered position. Move between.

DA5: Sub Paddle Lifting Circuit The sub paddle lifting circuit DA5 as an example of the lifting circuit of the first alignment conveying member controls the ON / OFF of the solenoid MA5 for lifting the sub paddle, and moves the sub paddle 23 between the standby position and the retracted position. Move between.
DA6: Paddle Drive Circuit The paddle drive circuit DA6 as an example of the drive circuit for the second aligning and conveying member controls the rotational drive of the paddle drive motor MA6 to rotate or stop the main paddle 11 and the sub paddle 23. To do.
DA7: Tamper Drive Circuit The tamper drive circuit DA7 as an example of the alignment member drive circuit controls the tamper drive motor 98 to rotate forward and backward, and aligns the tamper 12 with the end in the width direction of the recording sheet S. It moves between the position and the retracted position retracted to the outer end in the width direction.

DA8: Staple operation circuit The staple operation circuit DA8, which is an example of the operation circuit for the binding member, controls the stapler moving motor 74 and the stapler motor unit 81 to move the stapler 13 to the binding position, and then binds with the staple needle. I do.
DA9: Stacker Lift Circuit The stacker lift circuit DA9 as an example of the lift circuit of the second stacking unit controls the tray lift motor MA9 to lift and lower the stacker tray TH1.

(Function of control unit CA of post-processing device U3)
Further, the control unit CA of the post-processing device U3 has a function of executing a process according to an input signal from the signal output element and outputting a control signal to each control element. That is, the control unit CA has the following functions.
C11: Post-processing determination unit The post-processing determination unit C11 performs post-processing executed by the post-processing device U3 based on the image information received by the image formation control unit C1, as “no post-processing” and “binding”. It is determined whether it is “None (only alignment)” or “With binding”.
C12: Post-Processing Control Unit The post-processing control unit C12 controls each member of the post-processing device U3, performs post-processing on the recording sheet S, and discharges and stacks the recording sheet S on the stacker tray TH1.
The post-processing control unit C12 according to the first embodiment moves the shelf 17 to the storage position when the post-processing determined by the post-processing determination unit C11 is “no post-processing”, that is, when the post-processing is not executed. The compile discharge roll 4 and the stacker discharge roll 16 are rotationally driven in the state of being moved to, and the recording sheets S are discharged and stacked on the stacker tray TH1.
Further, the post-processing control unit C12 according to the first embodiment, when the post-processing determined by the post-processing determination unit C11 is “no binding (only alignment)” or “with binding”, on the compilation tray 6. After the recording sheet S is stacked and post-processing such as alignment and stapling is performed, a bundle of post-processed recording sheets S is discharged and stacked on the stacker tray TH1.

C13: Compile Discharge Roll Control Unit The compile discharge roll control unit C13, which is an example of the first discharge member control unit, controls driving of the compile discharge roll 4 and the like via the compile discharge roll drive circuit DA1. The recording sheet S is discharged to the compilation tray 6.
C14: Shelf control means The shelf control means C14, which is an example of the extension member control means, moves the shelf 17 between the extension position and the storage position via the shelf operation circuit DA3 based on the determination result of the post-processing determination means C11. Move between. When it is determined that “no post-processing”, the shelf control unit C14 according to the first embodiment moves the shelf 17 to the storage position. Further, when it is determined that post-processing is present, the shelf control unit C14 according to the first embodiment moves the shelf 17 to the extended position, and supports the lower surface of the recording sheet S conveyed by the compilation discharge roll 4. When the post-processing for the stacked recording sheets S is completed, the shelf control unit C14 moves the shelf 17 to the storage position before being discharged to the stacker tray TH1.

C15: Paddle rotation control means The paddle rotation control means C15, which is an example of the alignment conveyance member rotation control means, is connected to the main paddle 11 and the paddle drive circuit DA6 via the determination result of the post-processing determination means C11. The sub paddle 23 is rotated and stopped. The paddle rotation control means C15 of the first embodiment stops the rotation of the main paddle 11 and the sub paddle 23 when it is determined that “no post-processing”. Further, when it is determined that post-processing is present, the paddle rotation control means C15 of the first embodiment rotates the main paddle 11 and the sub-paddle 23 to transfer the recording sheet S discharged to the compile tray 6 to the end wall 8. Pull to the side. Then, the paddle rotation control means C15 of Embodiment 1 stops the rotation of the main paddle 11 and the pull-in paddle 22 when the stacking and alignment of the preset number of recording sheet bundles S1 are completed.

C16: Sub-paddle elevating control means The sub-paddle elevating control means C16 as an example of the elevating control means for the first aligning and conveying member is compiled via the sub-paddle elevating circuit DA5 based on the determination result of the post-processing determining means C11. The sub paddle 23 is moved between the standby position and the retracted position in accordance with the time when the recording sheet S is carried into the tray 6. When it is determined that “no post-processing”, the sub-paddle lift control means C16 of the first embodiment moves the sub-paddle 23 to the standby position and holds it. Further, when it is determined that there is post-processing, the sub-paddle lifting / lowering control means C16 of Embodiment 1 carries the recording sheet S into the compile tray 6 and the trailing end of the recording sheet S passes through the compile discharge sensor SN1. Each time the sub-paddle 23 is moved to the drawing position, the recording sheet S can be drawn to the end wall 8 side of the compilation tray 6. Then, the sub-paddle elevating control means C16 raises the clamp roll 22 to the standby position when the preset time elapses after the descent to the drawing position and the recording sheet S is drawn into the compilation tray 6. To separate from the recording sheet bundle S1.

C17: Tamper control means The tamper control means C17 as an example of the alignment control means has a tamper drive control means C17A as an example of the alignment member drive control means. Based on the determination result of the post-processing determination means C11, The tamper 12 is moved between the alignment position and the retracted position via the tamper drive circuit DA7. When the image forming operation is started, the tamper control unit C17 according to the first embodiment moves the tamper 12 to the retracted position as the initial position, and when it is determined that “no post-processing”, the tamper 12 is moved to the retracted position. Hold on. Further, when it is determined that post-processing is present, the tamper control means C17 of the first embodiment moves the tamper 12 to the alignment position every time the recording sheet S is carried into the compile tray 6, and the recording sheet S After aligning the ends in the width direction, return to the retracted position.

FIG. 11 is an explanatory diagram of forces and moments acting on the tamper according to the first embodiment.
In addition, in FIG. 11, illustration of the part unnecessary for description of force etc. is abbreviate | omitted suitably.
C17A: Tamper Drive Control Unit The tamper drive control unit C17A moves the tamper 12 by controlling forward / reverse rotation of the tamper drive motor 98 via the tamper drive circuit DA7. The tamper drive control means C17A according to the first embodiment controls the tamper drive motor 98 so that the acceleration when the tamper 12 is moved becomes an acceleration equal to or lower than a preset acceleration a1. In the first embodiment, the acceleration a1 when the tamper 12 is moved is set as follows. In FIG. 11, in the tamper 12 of the first embodiment, when the tamper 12 moves, the gravity acting on the center of gravity 12 a of the tamper 12 and the force received by the tamper rack teeth 97 from the tamper driving gear 99 act.

Accordingly, the outer guided roller 96b is separated from the inner surface of the tamper guide groove 91 during acceleration when the tamper 12 moves inward in the width direction or during deceleration when the tamper 1 moves outward in the width direction. In order to prevent the guided roller 96b from floating, the following formula (1) needs to be satisfied with respect to the moment Mo1 acting around the guided roller 96a inside the tamper 12. That is, in the plane along the loading surface 7a, the gravity acceleration component is g, and the center of gravity 12a from the inner guided roller 96a with respect to the direction perpendicular to the direction of gravity M1 × g acting on the center of gravity 12a of the tamper 12 The distance between the guide roller 96a and the contact position P1 on the inner side with respect to the direction of the force F1 acting when the tamper drive gear 99 is driven at the contact position P1 between the tamper drive gear 99 and the tamper rack teeth 97 is L1. When the distance is h1 and the acceleration when the tamper 12 is moved is a1, it is necessary to satisfy the following expression (1).
F1 × h1 ≦ M1 × g × L1 Formula (1)
In the formula (1), the following formula (2) is established from F1 = M1 × a1.
a1 ≦ (g × L1) / h1 Formula (2)

Note that the inner guided roller 96a is prevented from being separated from the inner surface of the tamper guide groove 91 during deceleration when the tamper 12 moves inward in the width direction or during acceleration when the tamper 1 moves outward in the width direction. For this purpose, the following formula (1 ′) needs to be satisfied with respect to the moment Mo1 ′ acting around the guided roller 96b outside the tamper 12. That is, when the distance from the outer guided roller 96b to the center of gravity 12a with respect to the direction perpendicular to the direction of gravity M1 × g acting on the center of gravity 12a of the tamper 12 is L1 ′, the following equation (1 ′) Need to be satisfied.
F1 ′ × h1 ≦ M1 × g × L1 ′ Formula (1 ′)
Note that the direction of the force F1 ′ is opposite to that of the force F1. In the formula (1 ′), the following formula (2 ′) is established from F1 ′ = M1 × a1.
a1 ≦ (g × L1 ′) / h1 Formula (2 ′)
Therefore, in the tamper drive control means C17A of the first embodiment, the tamper drive motor 98 is set so that the acceleration a1 satisfying the above equations (2) and (2 ') is obtained during acceleration / deceleration when the tamper 12 is moved. Control.

C18: Stapler Control Unit A stapler control unit C18 as an example of a binding control unit includes a position determination unit C18A, a stapler movement control unit C18B as an example of a drive control unit of the binding device, and an example of an operation control unit of the binding device. And the stapler operation control means C18C, and when the post-processing determined by the post-processing determination means C11 is “with binding”, the number of post-processing execution recording sheets S included in the image information. Are stacked on the compile tray 6 and the alignment of the recording sheet bundle S1 is completed, the stapler 13 is operated to bind the recording sheet bundle S1.
C18A: Position Determination Unit The position determination unit C18A determines the position of the moving staple unit 66 based on the detection result of the optical sensor 78.

FIG. 12 is an explanatory diagram of forces and moments acting on the moving staple unit of the first embodiment.
In FIG. 12, illustrations of parts not necessary for explanation of force and the like are omitted as appropriate.
C18B: Stapler Movement Control Unit The stapler movement control unit C18B operates the stapler movement motor 74 via the staple operation circuit DA8, and moves and stops the movable staple unit 67 according to the determination result of the position determination unit C18A. To control. The stapler movement control means C18B according to the first embodiment controls the stapler movement motor 74 so that the acceleration at the time of acceleration / deceleration when the moving staple unit 66 moves is equal to or lower than a preset acceleration a2. . In the first embodiment, the acceleration a2 when the moving staple unit 66 is moved is set as follows. 12, in the moving staple unit 66 of the first embodiment, when the moving staple unit 66 moves, the gravity acting on the center of gravity 66a of the moving staple unit 66, the force received by the rack teeth 62b from the stapler moving gear 73, Works.

Accordingly, the rear roller 71a is separated from the upper surface of the stapler support member 61 during acceleration when the moving staple unit 66 moves rearward along the stapler guide 62 or during deceleration when moving forward, that is, In order to suppress the floating, it is necessary to satisfy the following formula (3) with respect to the moment Mo2 acting around the roller 71b on the front side of the moving staple unit 66. That is, in the plane shown in FIG. 12 including the direction in which the stapler guide 62 extends and the direction perpendicular to the upper surface of the stapler support member 61, the gravity acceleration component is g and the gravity M2 acting on the center of gravity 66a of the moving staple unit 66. The distance from the front roller 71b to the center of gravity 66a with respect to the direction orthogonal to the direction xg is L2, and the force F2 acting when the stapler moving gear 73 is driven at the contact position P2 between the stapler moving gear 73 and the rack teeth 62b. When the distance between the roller 71b on the rear side with respect to the direction and the contact position P2 is h2, and the acceleration when the moving staple unit 66 is moved is a2, the following expression (3) needs to be satisfied.
F2 × h2 ≦ M2 × g × L2 Formula (3)
In the formula (3), the following formula (4) is established from F2 = M2 × a2.
a2 ≦ (g × L2) / h2 Formula (4)

In order to prevent the front roller 71b from floating from the upper surface of the stapler support member 61 during deceleration when the moving staple unit 66 moves forward or acceleration when moving backward, the moving staple unit 66 is moved. With respect to the moment Mo2 ′ acting around the roller 71a on the rear side of the unit 66, it is necessary to satisfy the following expression (3 ′). That is, when the distance from the rear roller 71a to the center of gravity 66a with respect to the direction perpendicular to the direction of gravity M2 × g acting on the center of gravity 66a of the moving staple unit 66 is L2 ′, the following equation (3 ′ ) Must be satisfied.
F2 ′ × h2 ≦ M2 × g × L2 ′ Formula (3 ′)
Note that the direction of the force F2 ′ is opposite to that of the force F2. In the formula (3 ′), the following formula (4 ′) is established from F2 ′ = M2 × a2.
a2 ≦ (g × L2 ′) / h2 Formula (4 ′)
Therefore, in the stapler drive control means C18B of the first embodiment, the tamper drive motor is set so that the acceleration a2 that satisfies the above equations (4) and (4 ') is obtained during acceleration / deceleration when the movable staple unit 66 is moved. 98 is controlled.

C18C: Stapler Operation Control Unit The stapler operation control unit C18C controls the stapler motor unit 81 via the staple operation circuit DA8 when the movable staple unit 66 is moved to a position for stapling by the stapler movement control unit C18B. Then, the stapler 13 is operated to perform the stapling process.

C19: Stacker discharge roll control means The stacker discharge roll control means C19 as an example of the second discharge member control means is connected via the stacker discharge roll drive circuit DA2 based on the determination result of the post-processing determination means C11. Then, by controlling the driving of the stacker discharge roll 16, the recording sheet S discharged from the compilation discharge roll 4 is discharged to the stacker tray TH1, or the recording sheet bundle S1 aligned or stapled on the compilation tray 6 is transferred to the stacker tray TH1. Or drain. When it is determined that “no post-processing” is performed, the stacker discharge roll control unit C19 according to the first embodiment drives the stacker discharge roll 16 to rotate forward, and the recording sheet S conveyed by the compile discharge roll 4 is As it is, it is discharged to the stacker tray TH1. Further, when the stacker discharge roll control means C19 of the first embodiment determines that “no binding (only alignment)” or “with binding”, that is, if it is determined that post-processing is present, the recording sheet S When the first recording sheet S of the bundle is carried into the compile tray 6, the recording sheet S is conveyed to the end wall 8 side in reverse rotation, and the second and subsequent recording sheets S are stacked. While it is, the stacker discharge roll 16 is stopped. When the post-processing for the recording sheets S stacked on the compile tray 6 is completed, the stacker discharge roll control means C19 drives the stacker discharge roll 16 to rotate in the forward direction so that the recording sheet bundle S1 on the compile tray 6 is transferred. It is discharged to the stacker tray TH1.

C20: Clamp Roll Elevation Control Unit Clamp roll elevation control unit C20 as an example of a conveyance member movement control unit is configured to perform clamping rolls via the clamp roll elevation circuit DA4 based on the determination result of the post-processing determination unit C11. 21 is moved between the raised position and the lowered position. When the image forming operation is started, the clamp roll lifting / lowering control unit C20 according to the first exemplary embodiment performs an initialization process of moving the clamp roll 21 to the ascending position as an initial position, and determines that “no post-processing” is performed. In this case, the clamp roll 21 is moved to the lowered position, and the recording sheet S discharged by the compilation discharge roll 4 together with the stacker discharge roll 16 is sandwiched and discharged to the stacker tray TH1. Further, when it is determined that post-processing is present, the lifting control unit C20 for the clamp roll according to the first embodiment moves the clamp roll 21 to the lowered position when the post-processing for the recording sheets S stacked on the compilation tray 6 is completed. , The post-processed recording sheet bundle S1 is sandwiched between the stacker discharge roll 16 and discharged to the stacker tray TH1.

C21: Stacker raising / lowering control means The stacker raising / lowering control means C21 as an example of the raising / lowering control means of the second stacking unit controls the raising / lowering of the stacker tray TH1 according to the amount of recording sheets S stacked on the stacker tray TH1. To do.

(Operation of Example 1)
In the printer U according to the first embodiment having the above-described configuration, when a job is started, an image is formed on the recording sheet S by the printer main body U1, and post-processing such as alignment and stapling is set. 11, 23, and is drawn into the compile tray 6, processed for alignment, stapling, etc., discharged to the stacker tray TH 1, and set to the stacker tray TH 1 without being drawn into the compile tray 6 when post-processing is not set. Discharged.
Here, the tamper 12 of the first embodiment is controlled to move at an acceleration a1 that satisfies the expressions (2) and (2 ′), and the moving staple unit 66 satisfies the expressions (4) and (4 ′). The movement is controlled by the acceleration a2.

13A and 13B are explanatory views of the operation of the tamper according to the first embodiment. FIG. 13A is an explanatory view showing a state where the outer guided roller floats when the acceleration is too large, and FIG. 13B is an inner guided case when the acceleration is too large. It is explanatory drawing of the state where the roller floated.
In FIG. 13A, when the tamper 12 is moved at an acceleration that does not satisfy the equation (2) during acceleration when the tamper 12 moves inward in the width direction or during deceleration when the tamper 1 moves outward in the width direction, The moment Mo1 acting with the force F1 increases. Here, when there is no gap, that is, so-called play, between the guided rod 94 and the tamper guide groove 91 or between the tamper drive gear 99 and the tamper rack teeth 97, the friction becomes large or a manufacturing error occurs. In some cases, it becomes difficult to move due to tight contact due to assembly errors or the like, and in general, a certain amount of play is provided.

Therefore, in the tamper 12 that can move by the backlash, when a large moment Mo1 is applied, the outer guided roller 96b floats from the tamper guide groove 91, and the guided rod 94 comes into contact with the inner surface of the tamper guide groove 91. As a result, noise is generated, wear and heat generation associated with an increase in frictional resistance, or a load on the tamper drive motor 98 increases. In addition, there is a problem that noise is generated when the outer guided roller 96b that has been lifted comes into contact with the tamper guide groove 91 again.
Similarly, when the tamper 12 is moved at an acceleration that does not satisfy the expression (2 ′) at the time of deceleration when the tamper 12 moves inward in the width direction or at the time of acceleration when the tamper 1 moves outward in the width direction, As shown in FIG. 13B, there is a problem that the inner guided roller 96a floats from the tamper guide groove 91.
On the other hand, in the first embodiment, the tamper 12 is controlled with the acceleration a1 that satisfies the equations (2) and (2 ′). Compared to the case shown in FIG. The increase in the load of the drive motor 98 is reduced.

14A and 14B are diagrams for explaining the operation of the moving staple unit according to the first embodiment. FIG. 14A is a diagram illustrating a state in which the rear roller floats when the acceleration is too large. FIG. 14B is a diagram illustrating the front roller when the acceleration is too large. It is explanatory drawing of the state which floated.
In FIG. 14A, the moving staple unit 66 is moved at an acceleration that does not satisfy Equation (4) during acceleration when the moving staple unit 66 moves rearward along the stapler guide 62 or during deceleration when moving forward. In this case, the moment Mo2 acting with the force F2 increases. Here, between the carriage 67 and the stapler support member 61 and between the stapler moving gear 73 and the rack teeth 62b, as in the case of between the guided rod 94 and the tamper guide groove 91, etc. In particular, a certain amount of play is provided.

Accordingly, in the movable staple unit 66 that can move by the backlash, when a large moment Mo2 is applied, the rear roller 71a floats from the upper surface of the stapler support member 61 as shown in FIG. There is a problem in that noise or wear or the like occurs at the time of contact between each part of the stapler and the stapler support member 61, or noise also occurs when the raised rear roller 71a contacts the stapler support member 61 again.
Similarly, when the moving staple unit 66 is moved at an acceleration not satisfying the expression (4 ′) at the time of deceleration when the moving staple unit 66 moves forward or at the time of acceleration when moving backward, it is shown in FIG. 14B. As described above, there is a problem that the front roller 71 b is lifted from the upper surface of the stapler support member 61.
On the other hand, in the first embodiment, the moving staple unit 66 is controlled with the acceleration a2 that satisfies the expressions (4) and (4 ′), and compared with the case shown in FIG. The increase in the load on the stapler moving motor 74 is reduced.

Next, the second embodiment of the present invention will be described. In the description of the second embodiment, the same reference numerals are given to the components corresponding to the components of the first embodiment, and the detailed description thereof will be given. Omitted.
The second embodiment is different from the first embodiment in the following points, but is configured in the same manner as the first embodiment in other points.

FIG. 15 is an explanatory diagram of the moving staple unit according to the second embodiment and corresponds to FIG. 5 according to the first embodiment.
In FIG. 15, in the moving staple unit 66 of the second embodiment, the motor support plate 76 supports the base end of a leaf spring 101 as an example of an urging member, and the tip of the leaf spring 101 is a stapler support member. 61 is in contact with the lower surface. The leaf spring 101 according to the second embodiment is disposed at a position corresponding to the position of the center of gravity 66a of the moving staple unit 66.
Therefore, the movable staple unit 66 according to the second embodiment is urged downward by the elastic force of the leaf spring 101 in the direction in which the roller 71 approaches the upper surface of the stapler support member 61.

FIG. 16 is an explanatory diagram of the tamper according to the second embodiment and corresponds to FIG. 8B according to the first embodiment.
In FIG. 16, in the tamper 12 of the second embodiment, the base end of the leaf spring 102 as an example of the urging member is disposed at the outer end portion of the guided rod 94 at a position outside the tamper rack teeth 97 in the width direction. The tip of the leaf spring 102 is in contact with the inner surface of the tamper guide groove 91. The leaf spring 102 of the tamper 12 is also arranged corresponding to the position of the center of gravity 12a of the tamper 12 like the leaf spring 101 of the moving staple unit 66.
Therefore, the tamper 12 of the second embodiment is biased in the direction in which the guided roller 96 is pressed against the inner surface of the tamper guide groove 91 by the elastic force of the leaf spring 102.

(Description of acceleration a1)
FIG. 17 is an explanatory diagram of forces and moments acting on the tamper according to the second embodiment, and corresponds to FIG. 11 according to the first embodiment.
Therefore, in the second embodiment, in order to prevent the outer guided roller 96b from being lifted during acceleration when the tamper 12 moves inward in the width direction or during deceleration when the tamper 1 moves outward in the width direction, It is necessary to satisfy the formula (5). That is, in FIG. 17, when the moment acting by the urging force of the leaf spring 102 is Mt1, it is necessary to satisfy the following formula (5).
F1 × h1 ≦ M1 × g × L1 + Mt1 Formula (5)
In the formula (5), the following formula (6) is established from F1 = M1 × a1.
a1 ≦ (g × L1) / h1 + Mt1 / (M1 × h1) (6)
In Example 2, when the distance from the inner guided roller 96a to the contact position P3 of the leaf spring 102 with respect to the direction orthogonal to the direction in which the urging force Fk1 of the leaf spring 102 acts is Lt1, Mt1 = Fk1 × L4, and the equation (6) can be expressed as the following equation (7).
a1 ≦ (g × L1) / h1 + (Fk1 × L4) / (M1 × h1) (7)

Note that the inner guided roller 96a is prevented from being separated from the inner surface of the tamper guide groove 91 during deceleration when the tamper 12 moves inward in the width direction or during acceleration when the tamper 1 moves outward in the width direction. In order to achieve this, regarding the moment acting around the guided roller 96b outside the tamper 12, when the moment acting by the leaf spring 102 is Mt1 ′, the following equation (5 ′) needs to be satisfied.
F1 ′ × h1 ≦ M1 × g × L1 ′ + Mt1 ′ Formula (5 ′)
In the formula (5 ′), the following formula (6 ′) is established from F1 ′ = M1 × a1.
a1 ≦ (g × L1 ′) / h1 + Mt1 ′ / (M1 × h1) Equation (6 ′)
When the distance from the outer guided roller 96b to the contact position P3 of the leaf spring 102 with respect to the direction orthogonal to the direction in which the biasing force Fk1 of the leaf spring 102 acts is L4 ′, Mt1 ′ = Fk1 × L4 ′, and the expression (6 ′) can be expressed as the following expression (7 ′).
a1 ≦ (g × L1 ′) / h1 + (Fk1 × L4 ′) / (M1 × h1) Formula (7 ′)
Therefore, in the tamper drive control means C17A of the second embodiment, the acceleration a1 that satisfies the above expressions (6), (6 ') or (7), (7') at the time of acceleration / deceleration when the tamper 12 is moved. The tamper drive motor 98 is controlled so that

(Description of acceleration a2)
FIG. 18 is an explanatory diagram of forces and moments acting on the moving staple unit of the second embodiment and corresponds to FIG. 12 of the first embodiment.
In the second embodiment, the moving staple unit 66 is moved to prevent the rear roller 71a from being lifted during acceleration when moving backward along the stapler guide 62 or when decelerating when moving forward. Regarding the moment acting around the roller 71b on the front side of the staple unit 66, it is necessary to satisfy the following formula (8). That is, when the moment acting by the urging force of the leaf spring 101 is Mt2, it is necessary to satisfy the following formula (8).
F2 × h2 ≦ M2 × g × L2 + Mt2 (8)
In the formula (8), the following formula (9) is established from F2 = M2 × a2.
a2 ≦ (g × L2) / h2 + Mt2 / (M2 × h2) Equation (9)
In Example 2, when the distance from the front roller 71b to the contact position P4 of the leaf spring 101 with respect to the direction orthogonal to the direction in which the urging force Fk2 of the leaf spring 101 acts is L5, Mt2 = Fk2. × L5, and equation (9) can be expressed as the following equation (10).
a2 ≦ (g × L2) / h1 + (Fk2 × L5) / (M2 × h2) (10)

In order to prevent the front roller 71b from lifting when the moving staple unit 66 moves forward or decelerates or accelerates backward, it acts around the rear roller 71a of the moving staple unit 66. The following equation (8 ′) needs to be satisfied when the moment acting by the leaf spring 101 is Mt2 ′.
F2 ′ × h2 ≦ M2 × g × L2 ′ + Mt2 ′ Formula (8 ′)
In the equation (8 ′), the following equation (9 ′) is established from F2 ′ = M2 × a2.
a2 ≦ (g × L2 ′) / h2 + Mt2 ′ / (M2 × h2) Equation (9 ′)
In the second embodiment, when the distance from the roller 71a on the rear side to the contact position P4 of the leaf spring 101 with respect to the direction orthogonal to the direction in which the urging force Fk2 of the leaf spring 101 acts is L5 ′, Mt2 '= Fk2 × L5', and the expression (9 ') can be expressed as the following expression (10').
a2 ≦ (g × L2 ′) / h1 + (Fk2 × L5 ′) / (M2 × h2) Equation (10)
Therefore, in the stapler drive control means C18B of the second embodiment, the above expressions (9) and (9 ') or the expressions (10) and (10') are satisfied at the time of acceleration / deceleration when the moving staple unit 66 is moved. The tamper drive motor 98 is controlled so that the acceleration becomes a2.

(Operation of Example 2)
In the printer U of the second embodiment having the above-described configuration, as in the first embodiment, the leaf springs 101 and 102 for preventing lifting are provided while reducing noise, compared to the case where the plate springs 101 and 102 are not provided. Increase accelerations a1 and a2 by the amount of the second term on the right side of equations (6), (6 '), (7), (7'), (9), (9 '), (10), and (10'). Thus, the tamper 12 and the moving staple unit 66 can be quickly accelerated and decelerated, and a time margin for increasing the maximum speed can be created.

(Example of change)
As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various change is made in the range of the summary of this invention described in the claim. Is possible. Modification examples (H01) to (H06) of the present invention are exemplified below.
(H01) In the above-described embodiment, the printer U is illustrated as an example of the image forming apparatus. However, the printer U is not limited to this, and can be applied to a copying machine, a FAX, or a multifunction machine having a plurality of functions.
(H02) In the second embodiment, the configuration in which the leaf springs 101 and 102 are arranged one by one is illustrated, but the present invention is not limited to this, and two or more leaf springs can be arranged. In this case, the moment used in equation (5) or the like is the sum of the moments.

(H03) In the second embodiment, the leaf springs 101 and 102 as an example of the urging member have been exemplified. However, the present invention is not limited to this, and any configuration that can be urged can be adopted, and the urging position is also Depending on the design, specifications, etc., it can be changed as appropriate.
(H04) In the embodiment described above, the numbers and positions of the guided rollers 96 and the rollers 71 are not limited to the configurations exemplified in the embodiments, and can be changed according to the design or the like.

(H05) In the embodiment described above, the positions of the centroids 12a and 66a are not limited to the positions exemplified in the embodiment, and may be established even in different positions.
(H06) In the above embodiment, when the floating of the moving staple unit 66 does not become a problem, the configuration for preventing the floating can be omitted.

6 ... Loading section,
7a ... loading surface,
12 ... alignment member,
12a ... center of gravity,
91 ... Guide part,
96 ... guided part,
96a, 96b ... one guided member,
97 ... transmitted part,
98 ... Driving source,
99 ... transmission member, gear,
102 ... biasing member,
C17A: Drive control means,
S ... medium
U: Image forming apparatus,
U3 ... post-processing device,
Uy to Uk + T1 + T2 + B: Image recording unit.

Claims (4)

A loading portion on which one end side has a loading surface inclined downward in the direction of gravity with respect to the other end side, and a medium is loaded thereon;
An alignment member disposed at an end in the width direction of the medium loaded on the stacking portion, supported so as to be movable along the width direction, and aligning the medium by contacting the end in the width direction of the medium; ,
A guide portion for guiding the alignment member along the width direction;
A guided portion provided on the alignment member and guided by contacting the guide portion;
A transmitted portion provided to the alignment member and to which a moving force for moving the alignment member in the width direction is transmitted;
A transmission member that transmits drive to the transmitted portion;
A drive source for driving the transmission member;
Drive control means for controlling the drive source, wherein a gravitational acceleration component is defined as g in a plane along the loading surface, and one of the directions is perpendicular to the direction of gravity acting on the center of gravity of the alignment member. The distance from the guided portion to the center of gravity is L, and the one guided member and the one guided member with respect to the direction of the force acting when the transmitting member is driven at the contact position between the transmitting member and the transmitted portion The drive control means for moving the alignment member at an acceleration a satisfying a ≦ (g × L) / h, where h is a distance from the contact position and a is an acceleration when the alignment member is moved. ,
A post-processing device comprising: A loading portion on which one end side has a loading surface inclined downward in the direction of gravity with respect to the other end side, and a medium is loaded thereon;
An alignment member disposed at an end in the width direction of the medium loaded on the stacking portion, supported so as to be movable along the width direction, and aligning the medium by contacting the end in the width direction of the medium; ,
A guide portion for guiding the alignment member along the width direction;
A guided portion provided on the alignment member and guided by contacting the guide portion;
A transmitted portion provided to the alignment member and to which a moving force for moving the alignment member in the width direction is transmitted;
A transmission member that transmits drive to the transmitted portion;
A drive source for driving the transmission member;
At least one biasing member that biases the alignment member in a direction in which the guided portion approaches the guide portion; and
Drive control means for controlling the drive source, wherein a gravitational acceleration component is defined as g in a plane along the loading surface, and one of the directions is perpendicular to the direction of gravity acting on the center of gravity of the alignment member. The distance from the guided portion to the center of gravity is L, and the one guided member and the one guided member with respect to the direction of the force acting when the transmitting member is driven at the contact position between the transmitting member and the transmitted portion The distance from the contact position is h, the acceleration when the alignment member is moved is a, the total moment around the one guided member acting by the urging force of the urging member is Mt, The drive control means for moving the alignment member at an acceleration a that satisfies a ≦ (g × L) / h + Mt / (M × h) when the mass is M;
A post-processing device comprising: The transmitted portion configured by teeth formed along the width direction;
The transmission member configured by a gear meshing with the teeth;
The post-processing apparatus according to claim 1, further comprising: An image recording unit for recording an image on a medium;
The post-processing device according to any one of claims 1 to 3, wherein post-processing is performed on the medium on which an image is recorded;
An image forming apparatus comprising:

Images