JPH05306052A - Sheet discharging device - Google Patents

Abstract

PURPOSE:To prevent the deflection of each sheet and smoothly carry out discharge by controlling a sheet pushing-out means so that a pushing-out member driving means stops when a sheet pushing-cut member advances to an advance position which is set according to the size and quantity of sheets. CONSTITUTION:A sheet discharging device 41 is equipped with a sheet receiving board 43 which receives a sheet transported from the body device, and a discharge tray 44 which receives s sheet disc discharged from the sheet receiving board 43. In this case, a sheet pushing-out means 60 for pushing out the sheet on the sheet receiving board 43 to the discharge tray 44 is installed. The sheet ushing-out means 60 is constituted of a sheet pushing-out member 61 and a pushing-ou0-out member driving means 109 vyhich advance/retreat-shifts the sheet pushing-out member 61 for the sheet on the sheet 0 board 43. The sheet pushing-out means 60 is controlled so that the pushing-out member 109 stops at an advance position which previously set on the basis of the size and quantity of the sheets. Accordingly, the deflection of each sheet can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is provided in an image forming apparatus such as a copying machine and a laser beam printer.
The present invention relates to a sheet discharge device that pushes out a sheet carried in from these devices onto a discharge tray and discharges the sheet.

[0002]

2. Description of the Related Art Recent copying machines are used in combination with an automatic document feeder and a post-processing device for automating copying operations and post-processing operations such as stapling or punching operations on sheets after copying. It has become so. The automatic document feeder is provided on a document table of a copying machine and, for example, conveys a plurality of documents one by one onto the document table of the copying machine. Also, the post-processing device is
With respect to a sheet in which an original image is copied and discharged from a copying machine, a process such as stapling or punching is performed for each copy of a predetermined number of sheets.

In the above conventional post-processing apparatus, for example, as disclosed in Japanese Unexamined Patent Publication No. 2-144370, when stapling is performed, sheets discharged from the copying machine are stacked on a processing tray, After being stapled by a stapler, a bundle of sheets, that is, a sheet bundle, is discharged onto a discharge tray by upper and lower discharge rollers.

[0004]

However, not only the above-mentioned post-processing apparatus but also an apparatus for discharging a sheet bundle from a processing tray by only upper and lower rollers, a large number of sheets bundled from one sheet. It is difficult to properly set the pressing force of the upper and lower rollers to the sheet in accordance with each sheet amount, and it becomes impossible to appropriately discharge the sheets up to the sheet tray. Further, when a sheet bundle that has not been integrated by the stapling process is discharged onto the discharge tray, there is a problem that the sheets are likely to shift.

[0005]

In order to solve the above-mentioned problems, a sheet discharging device according to the invention of claim 1 receives a sheet carried in from a main body device, and discharges from the sheet receiving base. In a sheet discharging device having a discharge tray for receiving a sheet, a sheet pushing-out means for pushing a sheet on the sheet receiving stand toward the discharging tray is provided, and the sheet pushing-out means is a sheet pushing-out member, and the sheet pushing-out member is a sheet receiving stand. It comprises an advancing position for pushing out the upper sheet in the direction of the discharge tray and an extruding member driving means for advancing and retreating to the retreat position on the sheet receiving stand, and the advancing position preset based on the size and number of the above-mentioned sheets. The above-mentioned sheet pushing-out means is controlled so that the pushing-out member driving means is stopped when the sheet pushing-out member is advanced. It is characterized in that it comprises a control means.

In order to solve the above-mentioned problems, the sheet discharging device according to the invention of claim 2 is a sheet receiving tray for receiving the sheet carried in from the main body device, and a discharging tray for receiving the sheet discharged from the sheet receiving tray. And a sheet pushing-out means for pushing the sheet on the sheet receiving tray toward the discharging tray, the sheet pushing-out means and the sheet pushing-out member for discharging the sheet on the sheet receiving tray. Direction and push-out member driving means for moving the retracted position on the sheet receiving base forward and backward. The vicinity of the sheet receiving base is preset based on the size and the number of sheets. An extruding member detecting means for detecting the sheet extruding member that has advanced to the advancing position is provided. Ri As pushing member driving means when detecting a sheet pushing member is stopped, it is characterized in that it comprises a control means for controlling the sheet extrusion means.

In order to solve the above-mentioned problems, the sheet discharging apparatus according to the third aspect of the present invention includes a sheet receiving tray for receiving the sheet carried in from the main body apparatus, and a discharging tray for receiving the sheet discharged from the sheet receiving tray. And a sheet pushing-out means for pushing the sheet on the sheet receiving tray toward the discharging tray, the sheet pushing-out means and the sheet pushing-out member for discharging the sheet on the sheet receiving tray. A push-out member drive means for advancing and retreating to an advancing position for pushing in the direction and a retreat position on the sheet receiving base, and an extruding member detecting means for detecting the advancing of the sheet extruding member is provided in the vicinity of the sheet receiving base. From the time the sheet pushing member is detected by the pushing member detecting means, As will pushing member driving means is stopped for a predetermined time which is set in advance based on the number, it is characterized in that it comprises a control means for controlling the sheet extrusion means.

[0008]

According to the structure of the first aspect, since the sheet on the sheet receiving table is pushed out onto the discharge tray by the sheet pushing means, the sheet can be discharged onto the discharge tray regardless of the sheet amount. At the same time, even when the sheet bundle that is not integrated is discharged, the deviation between the sheets is less likely to occur.

Further, when the sheet on the sheet receiving tray is pushed out onto the discharge tray by the sheet pushing means, the sheet pushing member pushes out when the sheet pushing member advances to the advance position preset based on the size and the number of sheets. Since the control means for controlling the sheet pushing-out means is provided so that the member driving means is stopped, the advancing position of the sheet pushing-out member is set to an arbitrary position on the sheet receiving base based on the size and the number of sheets. be able to. Therefore, since the sheet pushing member is advanced to the optimum advance position according to the size and number of sheets, the sheet can be extruded smoothly regardless of the size and number of sheets.

According to the structure of claim 2, as in the structure of claim 1, since the sheet on the sheet receiving table is pushed out onto the discharge tray by the sheet pushing means, the sheet can be discharged regardless of the sheet amount. Even when the sheet bundle that is not integrated is discharged, the deviation between the sheets is unlikely to occur.

Further, when the sheet on the sheet receiving tray is pushed onto the discharge tray by the sheet pushing means, the sheet having advanced to the advance position set in advance near the sheet receiving tray based on the size and the number of sheets. An extruding member detecting means for detecting the extruding member is provided, and a controlling means for controlling the sheet extruding means is provided so that the extruding member driving means stops when the extruding member detecting means detects the sheet extruding member. The advancing position of the sheet pushing member can be set to an arbitrary position on the sheet receiving base based on the size and the number of sheets. Therefore, since the sheet pushing member is advanced to the optimum advance position according to the size and number of sheets, the sheet can be extruded smoothly regardless of the size and number of sheets.

According to the configuration of claim 3, as in the configuration of claim 1, since the sheet on the sheet receiving table is pushed out onto the discharge tray by the sheet pushing means, the sheet can be discharged regardless of the sheet amount. Even when the sheet bundle that is not integrated is discharged, the deviation between the sheets is unlikely to occur.

Further, when the sheet on the sheet receiving tray is pushed out onto the discharge tray by the sheet pushing means, the pushing member detecting means for detecting the advance of the sheet pushing member is provided near the sheet receiving tray. A control unit for controlling the sheet pushing-out means is provided so that the pushing-out member driving means is stopped after a predetermined time set in advance based on the size and the number of sheets has elapsed since the sheet pushing-out member was detected by the detecting means. Therefore, the advancing position of the sheet pushing member can be set to an arbitrary position on the sheet receiving base based on the size and the number of sheets. Therefore, since the sheet pushing member is advanced to the optimum advance position according to the size and number of sheets, the sheet can be extruded smoothly regardless of the size and number of sheets.

[0014]

【Example】

[Embodiment 1] An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, a sheet post-processing device as a sheet discharging device is applied to a copying machine.

As shown in FIG. 3, the sheet post-processing device 41.
Is provided in the copying machine main body 1 as a main body device.
An RDH (Recirculating Doc), which is a kind of an automatic document feeder for transporting a document M onto a document table glass 3 of the copying machine body 1, is provided on the copying machine body 1.
A document handler 31 is provided.

The copy machine main body 1 is provided with the above-mentioned original platen glass 3 at the upper end thereof, and below the original platen glass 3, an optical system including a light source lamp 4, mirrors 5, 6, and 7 and a lens 8 is provided. A system 9 and a photosensitive drum 10 are arranged. The optical system 9 optically scans the document M conveyed on the document table glass 3 by the RDH 31 with the light emitted from the light source lamp 4, and reflects the reflected light on the respective mirrors 5, 6, 7.
By irradiating the exposure point A on the surface of the photosensitive drum 10 via the lens 8 and the lens 8, an electrostatic latent image corresponding to the image of the document M is formed on the surface of the photosensitive drum 10 uniformly charged by the main charger 11. To form.

Around the photosensitive drum 10, a main charger 11, a developing device 12, and a transfer charger 13 are provided.
And the peeling charger 14 are disposed, and the photoconductor drum 1
The electrostatic latent image formed on the surface 0 is developed as a toner image by the developing device 12, and the toner image is transferred to the transfer charger 1.
3 is transferred onto the sheet S, and the sheet S is peeled off from the photosensitive drum 10 by the peeling charger 14.

A sheet conveying path 15 for conveying the sheet S to the photosensitive drum 10 is provided below the photosensitive drum 10, and the sheet S for supplying the sheet S is provided on the upstream side of the sheet conveying path 15. A table 19, a paper feed cassette 20, and a paper feed deck 21 are arranged. On the other hand, the sheet conveying path 15
A conveyor belt 22 that conveys the sheet S on which the toner image is transferred, and a fixing device 23 that fixes the toner image on the sheet S are provided on the downstream side of the sheet.

At the downstream side of the fixing device 23, a deflector 24 for switching the conveying direction of the sheet S between the sheet post-processing device 41 direction and the re-conveying path 25 direction is provided. The re-conveyance path 25 forms a circulation path for re-conveying the sheet S on which the toner image has been transferred by the photoconductor drum 10 to the photoconductor drum 10, and an intermediate tray 26 is disposed on the way to the sheet S. It enables double-sided copying.

The RDH 31 has a manuscript tray 32 on its upper part, a feeding belt 33 on one side of the manuscript tray 32, and a feeding belt 34 on the manuscript table glass 3, which are circulated. Are connected by the document transport path 35. Then, the RDH 31 sends the document M stacked on the document tray 32 onto the document table glass 3 by the feeding belt 33, and positions the document M at a predetermined position on the document table glass 3 by the transport belt 34. At the same time, after the document scanning by the optical system 9 is completed, the document is returned to the document tray 32.

As shown in FIGS. 1 and 2, the sheet post-processing apparatus 41 is provided with a post-processing conveyance path 42 for conveying the sheet S carried out from the copying machine main body 1 in the sheet post-processing apparatus 41. , The sheet S by the post-processing conveyance path 42
A stapling plate 43 as a sheet pedestal is provided in the sheet conveying direction, and a discharge tray 44 is provided in the sheet S conveying direction from the staple plate 43.

The post-processing conveying path 42 has a carrying-in port 42a formed at one end thereof for carrying in the sheet S carried out from the copying machine main body 1, and a lower main path 42b and an upper bypass 42c are formed on the way. It is bifurcated into. A pair of upper and lower transport rollers 45, 45 and a transport roller 46 are provided at the end portions of the main path 42b and the bypass 42c.
・ 46 is provided, the bypass 42c and the main path 42b
A deflector 47 that rotates in the B ₁ -B ₂ direction and switches the conveying direction of the sheet S between the main path 42b direction and the bypass 42c direction is provided at the branch point of the and. Further, in order to detect the sheet S, as shown in FIG. 4, the main path 42b is provided with a sheet detection switch SW ₁ and the bypass 42c is provided with a sheet detection switch SW ₂ .

The stapling plate 43 binds (staples) the sheets S that have passed through the post-processing conveyance path 42.
The sheets S to be stacked are stacked. The stapling plate 43 is disposed so as to be inclined such that the front end of the sheet S when the conveyance direction of the sheet S is the front side is located above the rear end, and the front end is near the discharge port 114 of the sheet S. Has reached. On the staple plate 43, there is provided a paddle 48 which is rotated in the C direction while the lower end portion of the blade portion is in contact with the upper surface of the staple plate 43. The paddle 48 is rotated as described above to retreat the sheet S by its blade portion to a position where the rear end of the sheet S contacts the stopper 49, and aligns the sheet S in the transport direction.

On both sides of the staple plate 43 in the width direction, the staple plate 43 is viewed obliquely from above and rearward except the paddle 48, and FIG. As shown in FIG. 6 which is a view in the direction of arrow P in FIG. 1, a width aligning device 50 for aligning the sheets S is provided. The width-shifting device 50 includes a positioning plate 51 fixedly provided on one side of the staple plate 43 in the width direction,
A width-shifting plate 52 that is driven in the width direction of the staple plate 43 is provided.

As shown in FIG. 6, the width-shifting plate 52 is provided on a support plate 54 which is guided by guide rails 53 and is movable in the width direction of the stapling plate 43. A rack gear 54a is formed on a side edge portion of the support plate 54, and the width-shifting plate drive motor 5 is attached to the rack gear 54a.
By transmitting the power of No. 5 through the pulley 56, the belt 57, and the pinion gear 58, the width-shifting plate 52 is driven in the width direction of the staple plate 43, and the sheet S
Are aligned with the reference position set by the positioning plate 51. The width-shifting operation by the width-shifting plate 52 is performed in accordance with the width of the sheet S being used by controlling the width-shifting plate drive motor 55 by a sheet post-processing control device (control means) not shown. It is supposed to be.

A stapler 59 for closing the corners on the stopper 49 side and the positioning plate 51 side of the sheet S aligned by the stapling plate 43 is provided at the rear position of the positioning plate 51 in the width aligning device 50. There is.

At the front end of the staple plate 43,
As shown in FIG. 6, a rotary shaft 74 extending in the width direction of the staple plate 43 is provided, and the rotary shaft 74 is provided with a plurality of discharge rollers 75. Rotating shaft 74
Is connected to a discharge roller drive motor (not shown), and driven by this discharge roller drive motor, the rotating shaft 74, that is, the discharge rollers 75, is rotated in the G ₁ -G ₂ direction shown in FIG. That is, the discharge roller 75 rotates in the G ₂ direction to move the sheet S on the stapling plate 43 in the stopper 49 direction to assist the alignment in the conveyance direction, while rotating in the G ₁ direction. The bound sheet S is discharged onto the discharge tray 44.

A driven roller 78 is provided above the discharge roller 75. The driven roller 78 is rotatably supported at one end of the offset guide 77 of the offset guide device 80. Offset guide device 8
The other end of 0 is rotatably supported by the support shaft 79,
In the offset mode, the above-mentioned offset guide 77 which guides the upper surface side of the sheet S carried out from the main path 42b and guides it toward the discharge tray 44, and an offset guide drive device (not shown).

As shown in FIG. 2, in the discharge tray 44, a lower portion of the receiving surface of the sheet S, that is, a portion corresponding to the discharge roller 75 is a recessed portion 44a which is the lowermost surface of the discharge tray 44, and the sheet receiving portion is provided. The upper part of the surface is an inclined surface having substantially the same angle as the inclination angle of the stapling plate 43.

The discharge tray 44 is provided on the tray shift unit 81. In the tray shift unit 81, a shift frame 82 extending in the width direction of the staple plate 43 is supported movably in the width direction of the staple plate 43. Then, the power of the tray shift motor 85 is transmitted to the shift frame 82 via a plurality of gears or the like, so that the shift frame 82, that is, the discharge tray 44 and the tray back plate 94 shown in FIG.
And are integrally shifted in the width direction of the staple plate 43.

Further, the discharge tray 44 is adapted to be vertically driven by the tray elevating unit 95 shown in FIG. The tray elevating unit 95 includes a tray elevating motor (not shown), a belt 97 vertically provided on the inner surface of the tray back plate 94, belt supporting rollers 98 and 98 for supporting the belt 97, and a tray shift unit 81. Elevating auxiliary rollers 99 provided and pressed against the outer surface of the tray back plate 94, a pulley 100 provided on the drive shaft of the tray elevating motor, and the pulley 10
0 and a belt 101 hung between the lower belt supporting roller 98. A tray shift unit 81 is connected to the belt 97, and is driven by a tray lifting motor to move the belt 97, whereby the discharge tray 44 is lifted and lowered.

At the rear portion of the staple plate 43, as shown in FIGS. 5 and 6, an extruding device 60 as sheet extruding means is provided. This extrusion device 6
Reference numeral 0 denotes an extruding member 61 which is a sheet extruding member for extruding the sheet S on the staple plate 43 in the direction of the discharge tray 44, and the extruding member 61 for moving the sheet S on the staple plate 43 onto the discharge tray 44. The push-out member driving device 109 shown in FIG. 1 as a push-out member driving means for moving the push-out member in the D ₁ direction for pushing out and the retracted position of the end portion of the stapling plate 43 on the D ₂ direction side is shown. The push-out member driving device 109 includes the push-out belt 6 to which the push-out member 61 is connected.
2, the belt support rollers 63a and 63b, the guide shaft 65 also shown in FIG. 6, the connecting member 66, the sliding member 67, the pushing member drive motor 110 shown in FIG. 7, and the pulley 111.
Includes 113 and belt 112. The belt support roller 63b is provided on the rear portion of the stapling plate 43, and the pulley 113 is coaxially provided. Further, the pulley 111 is a pushing member drive motor 110.
Is provided on the rotary shaft of.

The pushing member drive motor 110 is a forward / reverse rotatable pulse motor driven by a pulse signal input from the sheet post-processing control device, and has a plurality of stator windings (not shown) provided therein. Is sequentially excited by a pulse signal, so that the rotating shaft is rotated in steps of 30 °, for example. As described above, the push-out member drive motor 110 can obtain the output of the rotation angle proportional to the number of pulse signals input from the sheet post-processing control device, and the output rotation speed proportional to the frequency of the input pulse signal. can get. Therefore, the pushing member drive motor 110 can stop the pushing member 61 at an arbitrary position in the front end portion of the staple plate 43.

The pushing member 61 is a flat plate-shaped base portion 6.
1a, standing portions 61b, 61b on both side edges in the width direction.
A sheet contact portion 61c that contacts the rear end portion of the sheet S is formed at the front portion of each standing portion 61b. The sheet contact portion 61c is formed such that the upper end thereof protrudes in the discharge tray 44 direction more than the lower end. That is, when the sheet S on the stapling plate 43 is pushed out onto the discharge tray 44, the rear end portion of the sheet S moves toward the sheet contact portion 61.
The sheet S can be easily discharged onto the discharge tray 44 without being caught by c.

The push-out member 61 has a standing portion 61b.
61b is arranged in a state of protruding above the stapling plate 43 through insertion holes 43a, 43a formed in the stapling plate 43. Extrusion belt 62
Are arranged below the stapling plate 43, are parallel to the upper surface of the stapling plate 43 by the belt supporting rollers 63a and 63b, and
3 is supported so as to be movable in the D ₁ -D ₂ direction along the upper surface of 3. A base portion 61a of the push-out member 61 is connected to the push-out belt 62 by a connecting member 66, and a push-out member drive motor 110 is connected to the belt support roller 63b via a pulley 113, a belt 112 and a pulley 111 as shown in FIG. It is connected. The guide shaft 65 is supported on the lower surface of the stapling plate 43 in parallel with the lower surface, and a sliding member 67 slidably provided on the guide shaft 65 is connected to the base portion 61a of the pushing member 61 to thereby push the pushing member. The guide shaft 61 is guided by the guide shaft 65 to move back and forth in the D ₁ -D ₂ direction.

Further, the pushing member 61 has a home position sensor 120 at the rear portion of the base portion 61a. The home position sensor 120 is used, for example, when the sheet S on the staple plate 43 is aligned by the width-shifting operation of the width-shifting device 50.
It is adapted to detect whether or not 1 has moved to the retracted position of the end portion position of the stapling plate 43 in the D ₂ direction.

Then, the power of the pushing member driving motor 110 is transmitted to the belt supporting roller 63b through the pulley 111, the belt 112 and the pulley 113, so that the pushing member 61 is moved along the upper surface of the stapling plate 43 at D ₁ The sheet S on the staple plate 43 is driven in the −D ₂ direction and pushed out in the discharge tray 44 direction. The pushing operation by the pushing member 61 is performed by the pushing member drive motor 1 as described later.
10 is controlled by a sheet post-processing control device (not shown), so that it is performed in correspondence with the size (size) and the number of sheets S used.

In the above-mentioned sheet post-processing control device, the push-out member 61 makes the D _{1 of the} stapling plate 43 on the basis of the data such as the size and the number of the sheets S input from the control device (not shown) of the copying machine main body 1 side. The push-out member drive motor 110 is controlled by setting the number of pulse signals to be output so that the push-out member drive motor 110 is advanced to the optimum advance position in the direction. That is,
If the size of the used sheet S is larger than the size of the sheet set in advance in the sheet post-processing control device, or if the number of sheets S used is larger than the number of sheets set in advance. If there are many,
As shown in FIG. 16A, the pushing member 61 is advanced to the frontmost position of the stapling plate 43 in the D ₁ direction. On the other hand, when the size of the used sheet S is smaller than the size of the sheet set in advance in the sheet post-processing control device, or the number of used sheets is larger than the number of sheets set in advance. When the number of S is small, as shown in FIG. 16B, the pushing member 61 is stopped at a position a predetermined amount before the foremost position of the stapling plate 43 in the D ₁ direction. Note that this position takes into consideration the sheet contact portion 61c of the pushing member 61, the angles of the stapling plate 43 and the discharge tray 44, the pushing speed of the sheet S by the pushing member 61, and the like, and the sheet S by the pushing member 61 is taken into consideration. Is set to an optimum position so that it can be smoothly pushed out onto the discharge tray 44.

In this way, since the pushing member 61 is advanced to the optimum position according to the size and the number of sheets S, the pushing out can be performed smoothly regardless of the size and the number of sheets S.

Between the upper edge of the stopper 49 on the stapling plate 43 and the lower conveying roller 45 in the main path 42b, the lower portion is the stopper 4 described above.
A sheet guide plate 73 connected to the sheet guide 9 is provided.
Further, as shown in FIG. 5, the stopper 49 has push-out member passage holes 49 a, 4 a for passing the push-out member 61.
9a is formed.

As shown in FIG. 4, the stapling plate 43 is provided with a sheet detection switch SW ₃ and a push-out detection switch SW ₄ . The sheet detection switch SW ₃ is D _{1 on the} stapling plate 43.
The sheet S to the discharge tray 44 provided at the front end of the sheet
It is designed to detect the discharge of. On the other hand, the push-out detection switch SW ₄ is turned on / off by the movement of the push-out member 61 in the push-out device 60, and when the push-out member 61 pushes out the sheet S on the staple plate 43 to the discharge tray 44, The state immediately before the completion of the pushing operation is detected. It should be noted that the means for detecting this state may be constituted by, for example, a timer that measures the elapsed time from the start of the movement of the pushing member 61, in addition to the pushing detection switch SW ₄ described above.

Further, the sheet post-processing device 41 described above is based on the sheet detection switches SW ₁ , SW ₂ , SW ₃ , the push-out detection switch SW ₄ and the input from the control device (not shown) on the copying machine body 1 side. The sheet post-processing control device (not shown) for controlling the operation of each of the above means. This sheet post-processing control device is composed of a microcomputer provided with a storage device, a counter, a timer, etc., and will be described later according to the offset mode, staple single mode, and staple multi mode set in the copying machine main body 1. It controls each of the above means.

The above offset mode is used in the copying machine main body 1
In the staple single mode, the sheets S conveyed from the copying machine body 1 are sequentially discharged onto the discharge tray 44 one by one without being subjected to post-processing, that is, staple processing. After staple processing is performed on S to perform binding as a part of the sheet S, the bound sheet S (hereinafter, referred to as a binding sheet S)
Is a processing mode in which the sheets are discharged once to the discharge tray 44 and the processing is finished. In the staple multi mode, the sheets S conveyed from the copying machine body 1 are stapled to form the bookbinding sheet S, and then the bookbinding sheet S Is a processing mode in which a series of operations for discharging the sheet to the discharge tray 44 are continuously performed a plurality of times.

In the above configuration, the sheet post-processing device 4
The operation of the sheet post-processing device 41 based on the control of the first sheet post-processing control device will be described below.

First, in the offset mode, as shown in the flowchart of FIG. 8, when the offset number, that is, the number of copies, is set in the copying machine main body 1, a signal indicating the offset number is transmitted from the control device of the copying machine main body 1. To be done. The sheet post-processing control device of the sheet post-processing device 41 is
When the above signal is received (S1), the number of offset sheets is set in the storage device (S2). Next, when the sheet post-processing control device of the sheet post-processing device 41 receives a signal indicating an operation start from the copying machine main body 1 (S3), a predetermined start process is performed (S4), and a counter for counting the number of processed sheets is displayed. Clear (S5).

In the start processing of S4, for example,
The deflector 47 is driven in the B ₁ direction, the tray elevating unit 95 positions the discharge tray 44 at a predetermined position, and the driven roller 78 causes the driven roller 78 to move to the discharge roller 7.
5, the offset guide 77 is driven in the F ₁ direction, the discharge roller 75 is rotated in the G ₁ direction, and the conveying rollers 45, 45 are rotated. Also,
The home position sensor 120 also confirms the movement of the pushing member 61 to the retracted position.

After that, when the sheet S on which the image of the document M is copied is carried into the carry-in port 42a of the post-processing conveying path 42 from the copying machine main body 1, the sheet S passes through the main path 42b and then the discharging roller. The sheet is discharged onto the discharge tray 44 through between the roller 75 and the driven roller 78. At this time, when the sheet detection switch SW ₁ is turned on, the conveyance operation of the sheet S on the main path 42b is detected (S6), the sheet detection switch SW ₃ is turned on (S7), and then turned off.
By (S8), passage of the sheet S between the rollers 75 and 78 is detected. As a result, the sheet post-processing control device increments the count value of the number of processed sheets (S9).

Next, the sheet post-processing control device of the sheet post-processing device 41 determines whether or not the current number of processed sheets has reached the previously set offset number (S10), and the number of processed sheets is the offset number of sheets. If not reached, the operation proceeds to S6. On the other hand, if the number of processed sheets has reached the offset number of sheets, the number of processed sheets of the counter is cleared (S11), the discharge tray 44 is lowered (S12), and the tray shift unit 81 shifts it (S13), and then again the predetermined number. It is raised to the position (S14). It should be noted that the shift operation of the discharge tray 44 in S13 includes the partial sheet S discharged onto the discharge tray 44 by the current discharge operation and the partial sheet S discharged onto the discharge tray 44 by the next discharge operation. This is for distinguishing between and on the discharge tray 44.

Thereafter, it is determined whether or not a signal indicating the end of the operation from the copying machine main body 1 is received (S15). If this signal is not received, the process proceeds to S6, while the above signal is received. A predetermined end process (S16),
The operation ends.

Next, in the staple single mode,
As shown in the flowchart of FIG. 9, when the sheet post-processing control device of the sheet post-processing device 41 receives a signal indicating the number of staples and the size of the sheets S used (S21), the number of staples is stored in the storage device. The size of the sheet S is stored together with the setting (S22). Next, when a signal indicating the operation start is received from the copying machine body 1 (S23), a predetermined start process is performed (S2).
4) Clear the counter for counting the number of processed sheets (S2
5).

In the start processing of S24, for example, the deflector 47 is driven in the B ₁ direction and the discharge tray 44
Are arranged at a predetermined position, the offset guide 77 is driven in the F ₂ direction, the discharge roller 75 is rotated in the G ₂ direction, the paddle 48 is rotated in the C direction, and the conveying rollers 45, 45 are rotated. In addition, the home position sensor 1
The movement of the pushing member 61 to the retracted position is also confirmed by 20.

After that, when the sheet S is carried into the carry-in port 42a of the post-process carrying path 42 from the copying machine main body 1, the sheet S passes through the main path 42b and then the carrying roller 45.
・ By 45, it is sent out toward the discharge roller 75,
The discharge roller 75 rotating in the G ₂ direction and the paddle 48 rotating in the C direction cause the rear end of the stopper 49.
And is placed on the stapling plate 43 in a state of abutting.

At this time, the sheet detection switch SW ₁ is turned off.
The passage of the sheet S through the main path 42b is detected by N (S26) and then OFF (S27).
As a result, the sheet post-processing control device clears the timer (S28) and increases the count value of the number of processed sheets (S2).
9).

After that, when the predetermined time set by the timer elapses (S30), it is determined that the sheet S is placed on the stapling plate 43 as described above, and the width aligning device 50 Position the sheet S on the positioning plate 5
It is moved to the reference position set in 1 and aligned in the width direction (S31).

Next, the sheet post-processing control device determines whether or not the current number of processed sheets has reached the previously set offset number (S32), and if the number of processed sheets has not reached the number of staples, the process proceeds to S26. Move to operation. On the other hand, if the number of processed sheets has reached the number of staples, the number of processed sheets of the counter is cleared (S33), and the stapler 59 performs stapling processing (S34).

Next, the bookbinding sheet ejection / ejection tray position adjustment processing is performed (S35). This bookbinding sheet discharge / discharge tray position adjustment processing is a series of processing for discharging the bookbinding sheet S on the staple plate 43 to the discharge tray 44 and adjusting the position of the discharge tray 44, as shown in the flowchart of FIG. Is. That is, first, after the discharge roller 75 is rotated in the G ₁ direction (S41), the pushing member driving device 109 advances the pushing member 61 in the D ₁ direction (S42). By the operation of S42, the bookbinding sheet S on the stapling plate 43 is discharged to the discharge tray 44.
Pushed out. Next, when the push-out detection switch SW ₄ is turned on by the movement of the push-out member 61 (S4
3), the discharge tray 44 is lowered (S44), and then
The extruding member 61 that has completed the extrusion of the bookbinding sheet S is retracted (S45). Next, the tray shift unit 81
To shift the discharge tray 44 (S46), and then raise the discharge tray 44 to a predetermined position (S4).
7).

After that, when a signal indicating the end of the operation is received from the copying machine main body 1 (S36), a predetermined end process is performed (S37), and the operation is ended.

Here, when the bookbinding sheet S is extruded in S42, the advancing position of the extruding member 61 in the D ₁ direction is, for example, in the D ₁ direction regardless of the size or number of the sheets S used. If it is set at the foremost position of the advance position, the bookbinding sheet S pushed out by the pushing member 61 of the pushing device 60 has a small size and a small number of sheets, and as shown in FIG. The paper is discharged farther than a predetermined discharge position on the sheet 44 and, in the worst case, falls from the discharge tray 44.
Further, for example, if it is set at a position before the foremost position of the advance position in the D ₁ direction, the pushing member 61 of the pushing device 60 is
If the size of the bookbinding sheet S pushed out by the sheet is large and the number of sheets is large, as shown in FIG. 17B, the trailing end of the bookbinding sheet S tends to be caught by the ejection roller 75 and the like on the ejection tray 44. Extrusion becomes difficult.

However, in the present sheet post-processing device 41, the rotary shaft of the pushing member drive motor 110 can be rotated stepwise in proportion to the number of pulse signals input from the sheet post-processing control device (not shown). By changing the number of pulse signals described above according to the size and number of sheets S used, the advancing position of the pushing member 61 can be set to an arbitrary position in the D ₁ direction of the stapling plate 43. it can. Therefore, the pushing member 6 is placed at an optimum position according to the size and the number of bookbinding sheets S.
Since 1 is advanced, regardless of the size and number of bookbinding sheets S, they can be extruded smoothly.

Next, in the staple multi mode, the operations shown in the flowcharts of FIGS. 11 to 15 are performed.
The bookbinding sheet ejection / ejection tray position adjustment processing in each flowchart is the operation shown in FIG.

First, as shown in FIG. 11, the sheet post-processing control device of the sheet post-processing device 41 is a signal indicating the number of staples for forming the bookbinding sheet S of each part and the size of the sheet S used. Is received (S61),
The number of staples is set in the storage device (S62), and the size of the sheet S is stored. Next, the copying machine body 1
When the signal indicating the operation start is received from (S63),
A predetermined start process is performed (S64), and the counter for counting the number of processed sheets is cleared (S65).

In the start processing of S64, for example, the deflector 47 is driven in the B ₁ direction and the discharge tray 44
Is arranged at a predetermined position, the offset guide 77 is driven in the F ₂ direction, the discharge roller 75 is rotated in the G ₂ direction, the paddle 48 is rotated in the C direction, and the transport rollers 45 and 46 are rotated. In addition, the home position sensor 1
The movement of the pushing member 61 to the retracted position is also confirmed by 20.

Then, the first part of the first part from the copying machine main body 1
When the sheet S of the first sheet is carried into the carry-in port 42a of the post-processing conveyance path 42, the sheet S passes through the main path 42b and then is conveyed by the conveyance rollers 45, 45 toward the discharge roller 75. Discharge roller 7 that rotates in _two directions
The paddle 48, which rotates in the 5th and C directions, is placed on the stapling plate 43 with its rear end in contact with the stopper 49.

At this time, the sheet detection switch SW ₁ is turned off.
The passage of the sheet S through the main path 42b is detected by N (S66) and then OFF (S67).
As a result, the sheet post-processing control device clears the timer (S68) and increases the count value of the number of processed sheets (S6).
9).

Next, since the sheet S being conveyed on the main path 42b is the first sheet S of the first copy,
The number of sheets to be processed is 1 (S70), and the stapling plate 43 is in the ready state in which the sheet S is not placed (S71). Therefore, the process proceeds to S78 shown in FIG. The device 50 aligns the sheet S in the width direction (S79). Since the number of staples has not been reached (S80), the process proceeds to S66.

Next, when the second sheet S of the first set is carried into the main path 42b, the above S66-
After performing the operation of S69, the number of processed sheets becomes 2.
70) and shifts to S78 in FIG. And S78
After the operation of S79, if the number of staples set in advance is reached, that is, if the number of staples set in advance is 2 (S80), the counter for the number of processed sheets is cleared (S81), and the stapler is set. Staple processing by 59 is performed (S82), and the process proceeds to S66.

On the other hand, if the number of staples is not reached in S80, S66 to S70 and S78 to S8.
The operation of 0 is performed until the number of staples is reached, and when the number of staples is reached, the operations of S81 and S82 are performed, and then S66.
Move to.

Next, in S66, when the sheet detection switch SW ₁ is not turned on after the stapling process in S82, the process proceeds to S83 shown in FIG. And S
If the above-described bookbinding sheet discharge / discharge tray position adjustment processing is not completed in 83 (S84),
The process proceeds to S66 again. Further, if the bookbinding sheet discharge / discharge tray position adjustment processing is completed in S83, it is determined whether or not a signal indicating the end of operation is received from the copying machine body 1 (S85), and if no signal is received. S66
On the other hand, if the signal has been received while proceeding to (S86), a predetermined termination process is performed (S86), and the operation is terminated.

[0069] Further, after the stapling process in S82 in S66, when already ON sheet detection switch SW ₁ by the first sheet S of the second copy, the sheet detection switch SW ₁ in S67 is not OFF,
The process moves to S87 in FIG.

Then, in S87, the binding sheet is discharged.
If the discharge tray position adjustment process is not completed, this process is performed (S88) and the process proceeds to S67, while if the bookbinding sheet discharge / discharge tray position adjustment process is completed, the process directly proceeds to S67.

Next, the sheet detection switch SW ₁ is turned on and then turned off in the above S66 and S67.
After performing the operations of S68 and S69 based on the above, the sheet S conveyed on the main path 42b is the first sheet of the second copy.
If it is the first sheet, since the number of sheets to be processed is 1 in S70, the process proceeds to S71. Then, in this S71,
By the bookbinding sheet ejection / ejection tray position adjustment processing, the first part of the bookbinding sheet S has already been pushed out from the staple plate 43, and the staple plate 43 is ready.
If the state is No, the process proceeds to S78 of FIG. 12 and the following operation is performed.

On the other hand, in S71, if the pushing of the bookbinding sheet S of the first copy on the stapling plate 43 has not been completed, the conveying rollers 45, 45 are stopped to make the second copy of the second copy. The first sheet S is stopped on the main path 42b (S72). afterwards,
Rotate the deflector 47 in the B ₂ direction to move the main path 42
b is closed (S73). As a result, the post-processing conveyance path 42
The second sheet S of the second set, which has been carried in, is conveyed through the bypass 42c. Next, after the sheet detection switch SW ₂ is turned on by the second sheet S (S7
4) When it is turned off (S75), the conveyance of the second sheet S of the second copy in the bypass 42c is confirmed by this, and the deflector 47 is moved in the B ₁ direction, that is, the bypass 42.
Rotate in the closing direction of c (S76), and convey roller 45
45 is rotated to restart the conveyance of the first sheet S of the second copy (S77). As a result, the first and second sheets S of the second set are synchronously placed on the stapling plate 43.

If the sheet detection switch SW ₂ is not turned on in S74, the process proceeds to S89 shown in FIG. If the above-described bookbinding sheet discharge / discharge tray position adjustment processing is not completed in S89 (S90), the processing proceeds to S74 again. If the bookbinding sheet ejection / ejection tray position adjustment processing is completed in S89, the process directly proceeds to S74.

Next, S68 to S70 and S78 to S8
2 operation, or S68 to S70, S78 to S80, S
The stapling process is performed through the operations of 66 to S70 and S78 to S82. After that, when the production of the bookbinding sheet S is finished in the second part, the sheet detection switch SW ₁ is not turned on in S66, whereby the process proceeds to S83 shown in FIG. 13 and the operation is finished as described above. To do. On the other hand, when the production of the bookbinding sheet S is continued even after the third copy, the operations of S66 to S70, S78 to S84 and S87 to S90 are appropriately performed, and then S85 and S8.
After the operation of 6, the operation of the staple multi mode is completed.

As described above, in the staple multi-mode of the sheet post-processing apparatus 41, a part of the bookbinding sheets S to be prepared is a part of the bookbinding sheet S.
However, when the sheet S remains on the staple plate 43 in a state where the ejection to the discharge tray 44 is not completed, the timing at which the first sheet S of the next portion is placed on the staple plate 43 is changed. Since the first sheet S is delayed and placed on the stapling plate 43 in synchronization with the second sheet S, the processing speed is high.

The belt supporting roller 63b and the pushing member driving motor 1 in the pushing member driving device 109 described above are used.
As shown in FIG. 7, the connection with the belt 10 is made via a pulley 113, a belt 112, and a pulley 111.
The connection with 10 is not limited to the above method,
In addition to the above method, as shown in FIG. 18, the belt supporting roller 63b and the pushing member driving motor 110 may be connected via a plurality of gears 115, 116, 117. The gear 115 is used for the pushing member drive motor 1
10 is provided on the rotating shaft, and the gear 117 is
It is provided coaxially with the belt support roller 63b.

Also in the above configuration, since the rotary shaft of the pushing member drive motor 110 can be rotated stepwise in proportion to the number of pulse signals input from the sheet post-processing control device (not shown), the above pulse is generated. By changing the number of signals according to the size and the number of sheets S used, the advancing position of the pushing member 61 can be set to an arbitrary position in the D ₁ direction of the stapling plate 43. Therefore, since the pushing member 61 is advanced to the optimum position according to the size and number of the bookbinding sheets S,
It is possible to smoothly push out the bookbinding sheet S regardless of the size and the number of sheets.

[Embodiment 2] Another embodiment of the present invention is shown in FIG.
21 to 21 will be described below. For convenience of explanation, members having the same functions as those of the members shown in the drawings of the above-described embodiments are designated by the same reference numerals, and the description thereof will be omitted.

In the sheet post-processing device 121 of this embodiment, the pushing member driving motor 110 of the pushing member driving device 109 shown in FIG. 7 is replaced with a pulse motor from a three-phase shunt winding commutator motor such as a Schlage type motor. As shown in FIG. 19, in the vicinity of the front end portion of the stapling plate 43, an extruding member detecting sensor 122 as extruding member detecting means,
123 is provided.

The above-mentioned push-out member detection sensors 122 and 12
3 is arranged below the stapling plate 43. As shown in FIG. 20, the pushing member detection sensor 122
Indicates that the push-out member 61 is D _{1 of the} staple plate 43.
When the sheet has advanced to the foremost position of the advancing position, a signal is output to the sheet post-processing control device (not shown) by detecting this advancing, and as shown in FIG. When the push-out member 61 advances to a predetermined position in the D ₁ direction of the stapling plate 43, it detects the advance and outputs a signal to the sheet post-processing control device. Therefore, the sheet post-processing control device recognizes the advanced position of the pushing member 61 on the stapling plate 43 based on the signals input from the pushing member detection sensors 122 and 123.

The above-mentioned sheet post-processing control device advances the stapling plate 43 of the extruding member 61 in the D ₁ direction based on the size and number of sheets S input from a control device (not shown) on the copying machine main body 1 side. The position is set to control the pushing member drive motor 110. That is, when the size of the used sheet S is larger than the size of the sheet preset in the sheet post-processing control device, or when the number of sheets used is larger than the preset number of sheets. If the number of S's is large, FIG.
As shown in FIG. 6, when it is recognized that the push-out member 61 has advanced to the frontmost position of the stapling plate 43 in the D ₁ direction by the signal input from the push-out member detection sensor 122, the push-out member drive motor 110 is activated. Stop. On the other hand, when the size of the used sheet S is smaller than the size of the sheet set in advance in the sheet post-processing control device, or the number of used sheets is larger than the number of sheets set in advance. When the number of S is small, as shown in FIG. 21, the pushing member 61 is detected by the signal input from the pushing member detection sensor 123.
Recognizes that the staple plate 43 has advanced by a predetermined amount from the foremost position of the stapling plate 43 in the D ₁ direction, the pushing member drive motor 110 is stopped. still,
This position corresponds to the angle of the sheet contact portion 61c of the pushing member 61, the staple plate 43 and the discharge tray 44,
Alternatively, in consideration of the pushing speed of the sheet S by the pushing member 61, etc., the pushing position of the sheet S is set to the optimum position where the pushing member 61 pushes the sheet S onto the discharge tray 44 smoothly.

Therefore, the sheet post-processing control device controls the pushing member drive motor 110 by the signals input from the pushing member detection sensors 122 and 123, so that it is optimal for the size and number of sheets S used. The pushing member 61 can be advanced to the position.

In the above-described structure, the operation of the sheet post-processing apparatus 121 under the control of the sheet post-processing control apparatus (not shown) is the same as in the first embodiment shown in FIG. 8 in the offset mode and in FIG. 9 in the staple single mode. 11 to 15 in the staple multi mode
Is shown in each flowchart. In the bookbinding sheet discharge / discharge tray position adjustment processing in each flowchart, the operation shown in the flowchart in FIG. 10 is performed.

In the flowchart of FIG. 10, in the present sheet post-processing device 121, the bookbinding sheet S in S42.
Extruding member detection sensor 122/123 when pushing out
The push-out member drive motor 110 is stopped when the push-out member 61 recognizes that the push-out member 61 has advanced to the optimum position of the stapling plate 43 in the D ₁ direction. Therefore, the pushing member 61 can be stopped at the optimum position in the advancing position of the stapling plate 43 in the D ₁ direction according to the size and the number of bookbinding sheets S, regardless of the size and the number of bookbinding sheets S. The extrusion can be performed smoothly.

As in the case of the first embodiment, the coupling between the belt supporting roller 63b and the pushing member driving motor 110 in the pushing member driving device 109 is performed by the pulley 113, the belt 112 and the pulley 111 as shown in FIG. Other than the method via the gears, as shown in FIG. 18, the gears 115, 116 and 117 may be used. The gear 115 is provided on the rotary shaft of the pushing member drive motor 110, and the gear 117 is provided coaxially with the belt support roller 63b.

Also in the above-mentioned configuration, the sheet post-processing control device (not shown) is provided with the push-out member detection sensors 122 and 12.
When the push-in member 61 recognizes that the push-out member 61 has reached the optimum position in the advance position of the stapling plate 43 in the D ₁ direction, the push-out member drive motor 110 is stopped. Therefore, the pushing member 61 can be stopped at the optimum position in the advancing position of the stapling plate 43 in the D ₁ direction according to the size and the number of bookbinding sheets S, regardless of the size and the number of bookbinding sheets S. The extrusion can be performed smoothly.

In the second embodiment, two push-out member detection sensors as push-out member detection means are provided near the front end of the staple plate 43. The number is not limited to two, and three or more may be installed. When three or more push-out member detection sensors are installed, the push-out member 61 can be stopped at an optimum position in the advancing position of the stapling plate 43 in the D ₁ direction according to the size and number of the bookbinding sheets S more finely. it can.

[Embodiment 3] Still another embodiment of the present invention will be described below with reference to FIGS. For convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 22, the sheet post-processing apparatus 141 of this embodiment is provided with an extruding member detecting sensor 142 as an extruding member detecting means near the front end of the staple plate 43. ..

The push-out member detecting sensor 142 is arranged below the stapling plate 43, as shown in FIG.
As shown in FIG. 5, when the pushing member 61 has advanced to a predetermined position in the D ₁ direction of the stapling plate 43, this advance is detected and a signal is output to a sheet post-processing control device (not shown). Therefore, in the sheet post-processing control device, the pushing member 61 causes the stapling plate 43 to respond to the signal input from the pushing member detection sensor 142.
It is recognized that the player has advanced to a predetermined position in. Further, the sheet post-processing control device has a built-in timer that starts measuring the time when the signal is input from the pushing member detection sensor 142.

The above sheet post-processing control device advances the stapling plate 43 of the pushing member 61 in the D ₁ direction based on the size and number of sheets S input from a control device (not shown) on the copying machine main body 1 side. The position is set to control the pushing member drive motor 110. That is, when the size of the sheet S used is smaller than the size of the sheet preset in the sheet post-processing control device, or the number of sheets used more than the preset number of sheets. If the number of S is small,
As shown in FIG. 3, the push-out member drive motor 110 is immediately stopped when it is recognized that the push-out member 61 has advanced to a predetermined position on the stapling plate 43 by the signal input from the push-out member detection sensor 142. On the other hand, the sheet S used is larger than the sheet size preset in the sheet post-processing control device.
23 is large, or the number of used sheets S is larger than the preset number of sheets, as shown in FIG. 23, the signal input from the pushing member detection sensor 142 causes From the time when it is recognized that the pushing member 61 has advanced to a predetermined position on the stapling plate 43, the time is measured by a built-in timer, and when the preset time has elapsed, the pushing member drive motor 110 is stopped. As a result, as shown in FIG. 24, the push-out member 61 further advances from the predetermined position on the stapling plate 43 by the amount of time elapsed. Note that this time is the angle of the sheet contact portion 61c of the pushing member 61, the angle of the stapling plate 43 and the discharge tray 44, or the sheet S by the pushing member 61.
In consideration of the pushing speed and the like, the pushing member 61 is set to be able to advance to the optimum position where the pushing of the sheet S onto the discharge tray 44 is smoothly performed.

Therefore, the sheet post-processing control device controls the pushing member drive motor 110 by the signal inputted from the pushing member detection sensor 142 and the timer which starts measuring the time from the time when this signal is inputted. The pushing member 61 can be advanced to an optimum position according to the size and number of the sheets S used.

In the above-described structure, the operation of the sheet post-processing device 141 under the control of the sheet post-processing control device (not shown) is the same as in the first embodiment shown in FIG. 8 in the offset mode and FIG. 9 in the staple single mode. 11 to 15 in the staple multi mode
Is shown in each flowchart. In the bookbinding sheet discharge / discharge tray position adjustment processing in each flowchart, the operation shown in the flowchart in FIG. 10 is performed.

In the flowchart of FIG. 10, the bookbinding sheet S in S42 is used in the booklet post-processing apparatus 141.
At the time of pushing out the sheet, a signal input from the pushing member detection sensor 142 recognizes that the pushing member 61 has advanced to the optimum position in the D ₁ direction of the stapling plate 43. Is measured, and when the preset time has passed,
The pushing member drive motor 110 is stopped. Therefore, the pushing member 61 can be stopped at the optimum position in the advancing position of the stapling plate 43 in the D ₁ direction according to the size and the number of bookbinding sheets S, regardless of the size and the number of bookbinding sheets S. The extrusion can be performed smoothly.

As in the case of the first embodiment, the coupling between the belt supporting roller 63b and the pushing member driving motor 110 in the pushing member driving device 109 is performed by the pulley 113, the belt 112 and the pulley 111 as shown in FIG. Other than the method via the gears, as shown in FIG. 18, the gears 115, 116 and 117 may be used. The gear 115 is provided on the rotary shaft of the pushing member drive motor 110, and the gear 117 is provided coaxially with the belt support roller 63b.

Also in the above configuration, the sheet post-processing control device (not shown) causes the push-out member 61 to reach the optimum position in the advancing position of the stapling plate 43 in the D ₁ direction by the signal input from the push-out member detecting sensor 142. The time is measured by a built-in timer from the time when the advance is recognized, and the pushing member drive motor 110 is stopped when a preset time has elapsed. Therefore, depending on the size and number of bookbinding sheets S, the pushing member 6
Since 1 can be stopped at the optimum position of the advancing position of the stapling plate 43 in the D ₁ direction, it can be pushed out smoothly regardless of the size and the number of bookbinding sheets S.

[0097]

As described above, the sheet discharging apparatus according to the first aspect of the present invention includes the sheet receiving tray for receiving the sheet carried in from the main body apparatus and the discharging tray for receiving the sheet discharged from the sheet receiving tray. The sheet discharging device has a sheet pushing means for pushing the sheet on the sheet receiving tray toward the discharging tray, and the sheet pushing means has a sheet pushing member and the sheet pushing member moves the sheet on the sheet receiving tray toward the discharging tray. When the sheet push-out member is advanced to the advance position which is preset based on the size and the number of the above-mentioned sheets, the push-out member driving means is configured to move the push-out position for pushing out and the retreat position on the sheet receiving base. In addition, a control means for controlling the above-mentioned sheet pushing means is provided so that the pushing member driving means stops. That.

Therefore, the sheets can be discharged onto the discharge tray regardless of the amount of the sheets, and even when the sheet bundles which are not integrated are discharged, the deviation between the sheets hardly occurs. Further, when the sheet is pushed out to the discharge tray, the sheet pushing-out means is stopped so that the pushing-out member driving means is stopped when the sheet pushing-out member is advanced to the advance position preset based on the size and the number of sheets. Since the control means for controlling the sheet ejection unit is provided, the advancing position of the sheet pushing member can be set to an arbitrary position on the sheet receiving base based on the size and the number of sheets. Therefore, since the sheet pushing-out member is advanced to the optimum advance position corresponding to the size and the number of sheets, there is an effect that the sheet can be pushed out smoothly regardless of the size and the number of sheets.

As described above, the sheet discharging apparatus according to the second aspect of the present invention has the sheet receiving tray for receiving the sheet carried in from the main body apparatus and the discharging tray for receiving the sheet discharged from the sheet receiving tray. In the ejector,
A sheet pushing-out means for pushing the sheet on the sheet receiving tray toward the discharge tray is provided, and the sheet pushing-out means, and an advancing position for pushing the sheet pushing member on the sheet receiving stand toward the discharging tray, A sheet pushing member that moves forward and backward to a retreat position on the sheet cradle, and a sheet pushing member that has advanced to an advance position set in advance near the sheet cradle based on the size and number of sheets. And a control means for controlling the sheet pushing means so that the pushing member driving means is stopped when the sheet pushing member is detected by the pushing member detecting means. Is.

Therefore, regardless of the amount of sheets, the sheets can be discharged onto the discharge tray, and even when the sheet bundles that are not integrated are discharged, the deviation between the sheets hardly occurs. Further, when the sheet is pushed out to the discharge tray, a control means for controlling the sheet pushing-out means is provided so that the pushing-out member driving means is stopped when the sheet pushing-out member is detected by the pushing-out member detecting means. The advancing position of the sheet pushing member can be set to an arbitrary position on the sheet pedestal based on the size and the number of sheets. Therefore, since the sheet pushing-out member is advanced to the optimum advance position corresponding to the size and the number of sheets, there is an effect that the sheet can be pushed out smoothly regardless of the size and the number of sheets.

As described above, the sheet discharging apparatus according to the third aspect of the invention has the sheet receiving tray for receiving the sheet carried in from the main body apparatus and the discharging tray for receiving the sheet discharged from the sheet receiving tray. In the ejector,
A sheet pushing-out means for pushing the sheet on the sheet receiving tray toward the discharge tray is provided, and the sheet pushing-out means, and an advancing position for pushing the sheet pushing member on the sheet receiving stand toward the discharging tray, The push-out member driving means for moving the sheet push-back member to the retracted position is provided in the vicinity of the above-mentioned sheet receiving base, and the push-out member detecting means for detecting the advance of the sheet push-out member is provided. A control means for controlling the above-mentioned sheet pushing-out means is provided so that the pushing-out means driving means is stopped after a predetermined time set in advance based on the size and number of the above-mentioned sheets from the time when the pushing-out member is detected. It has a structure.

Therefore, regardless of the amount of sheets, the sheets can be discharged onto the discharge tray, and even when the sheet bundles that are not integrated are discharged, the deviation between the sheets hardly occurs. Further, when the sheet is pushed out to the discharge tray, the pushing member driving means is stopped after a predetermined time set in advance based on the size and the number of sheets from the time when the sheet pushing member is detected by the pushing member detecting means. As described above, since the control means for controlling the sheet pushing-out means is provided, the advancing position of the sheet pushing-out member can be set to an arbitrary position on the sheet receiving base based on the size and the number of sheets. Therefore,
Since the sheet push-out member is advanced to the optimum advance position according to the size and number of sheets, there is an effect that the sheet can be extruded smoothly regardless of the size and number of sheets.

[0103]

[Brief description of drawings]

FIG. 1 is an enlarged view of a main part in FIG. 2, showing an overall configuration of a sheet post-processing device which is a sheet discharging device according to an embodiment of the present invention.

FIG. 2 is an overall configuration diagram of a sheet post-processing apparatus showing an embodiment of the present invention.

3 is an overall configuration diagram of a copying machine including the sheet post-processing apparatus shown in FIG.

FIG. 4 is an explanatory diagram showing the arrangement positions of respective detection switches in the sheet post-processing apparatus shown in FIG.

5 is a perspective view of the structure on the stapling plate shown in FIG. 1 as seen obliquely from behind and with the paddle removed.

FIG. 6 is a view in the direction of arrow P in FIG.

7 is a configuration diagram of a main part of the extrusion device shown in FIG.

8 is a flowchart showing an operation of the sheet post-processing apparatus shown in FIG. 1 in an offset mode.

9 is a flowchart showing an operation in the staple single mode in the sheet post-processing apparatus shown in FIG.

10 is a flowchart showing the operation contents of the bookbinding sheet discharge / discharge tray position adjustment processing shown in FIG.

11 is a flowchart showing a part of the operation in the staple multi mode in the sheet post-processing apparatus shown in FIG.

12 is a flowchart showing a part of the operation in the staple multi mode in the sheet post-processing apparatus shown in FIG.

13 is a flowchart showing a part of the operation in the staple multi mode in the sheet post-processing apparatus shown in FIG.

14 is a flowchart showing a part of the operation in the staple multi mode in the sheet post-processing apparatus shown in FIG.

FIG. 15 is a flowchart showing a part of the operation in the staple multi mode in the sheet post-processing apparatus shown in FIG.

16 (a) and 16 (b) are explanatory views showing the advanced position of the pushing member in the pushing device shown in FIG.

17A and 17B are explanatory views showing the operation of the bookbinding sheet by pushing out the pushing member in the pushing device shown in FIG.

18 is a configuration diagram of a main part of the extrusion device shown in FIG.

FIG. 19 is an overall configuration diagram of a sheet post-processing apparatus showing another embodiment of the present invention.

20 is an explanatory view showing the advanced position of the pushing member in the pushing device shown in FIG.

FIG. 21 is an explanatory view showing the advanced position of the pushing member in the pushing device shown in FIG.

FIG. 22 is an overall configuration diagram of a sheet post-processing apparatus showing still another embodiment of the present invention.

23 is an explanatory diagram showing the advanced position of the pushing member in the pushing device shown in FIG.

FIG. 24 is an explanatory view showing the advanced position of the pushing member in the pushing device shown in FIG. 22.

[Explanation of symbols]

1 Copying Machine Main Body (Main Unit Device) 41 Sheet Post-Processing Device (Sheet Ejecting Device) 42 Post-Processing Conveying Path 42b Main Path 42c Bypass 43 Staple Plate (Sheet Receptacle) 44 Ejection Tray 47 Deflector 48 Padra 49 Stopper 50 Width Adjusting Device 51 Positioning Plate 52 Width Adjusting Plate 59 Stapler 60 Extrusion Device (Sheet Extrusion Means) 61 Extrusion Member (Sheet Extrusion Member) 61c Sheet Abutting Part 75 Ejection Roller 77 Offset Guide 80 Offset Guide Device 81 Tray Shift Unit 95 Tray Elevating Unit 109 Extrusion Member driving device (pushing member driving means) 110 Pushing member driving motor 120 Home position sensor 122 Pushing member detection sensor (pushing member detection means) 123 Pushing member detection sensor (pushing member detection) Means) 142 pushing member detection sensor (pushing member detecting means) S sheet SW ₁ sheet detection switch

Claims (3)

[Claims] 1. A sheet discharging device having a sheet receiving tray for receiving a sheet carried in from a main body device and a discharge tray for receiving a sheet discharged from the sheet receiving tray, in which a sheet on the sheet receiving tray is directed in a discharge tray direction. The sheet pushing-out means for pushing out the sheet pushing-out means, and the sheet pushing-out means moves the sheet pushing-out member forward and backward to the advance position for pushing the sheet on the sheet receiving tray toward the discharge tray and the retracted position on the sheet receiving tray. The sheet pushing-out means driving means for stopping the pushing-out member driving means when the sheet pushing-out member advances to the advance position preset based on the size and the number of the above-mentioned sheets. A sheet ejection device, comprising a control means for controlling the sheet ejection device. 2. A sheet discharging device having a sheet receiving tray for receiving a sheet carried in from a main body device and a discharge tray for receiving a sheet discharged from the sheet receiving tray, wherein a sheet on the sheet receiving tray is directed in a discharge tray direction. The sheet pushing-out means for pushing out the sheet pushing-out means, and the sheet pushing-out means moves the sheet pushing-out member forward and backward to the advance position for pushing the sheet on the sheet receiving tray toward the discharge tray and the retracted position on the sheet receiving tray. A push-out member detecting means for detecting the sheet push-out member advanced to an advance position set in advance based on the size and the number of sheets is provided in the vicinity of the sheet receiving base. , When the sheet pushing member is detected by the pushing member detecting means, the pushing member driving means is stopped. As described above, the sheet discharging device is provided with the control means for controlling the above-mentioned sheet pushing-out means. 3. A sheet discharging device having a sheet receiving tray for receiving a sheet carried in from a main body device and a discharge tray for receiving a sheet discharged from the sheet receiving tray, wherein a sheet on the sheet receiving tray is directed toward the discharge tray. The sheet pushing-out means for pushing out the sheet pushing-out means, and the sheet pushing-out means moves the sheet pushing-out member forward and backward to the advance position for pushing the sheet on the sheet receiving tray toward the discharge tray and the retracted position on the sheet receiving tray. The pushing member detecting means for detecting the advancing of the sheet pushing member is provided in the vicinity of the above-mentioned sheet receiving base, and when the sheet pushing member is detected by the pushing member detecting means, Extruding member driving means after a predetermined time set in advance based on the size and number of sheets 2. A sheet discharging device comprising a control means for controlling the above-mentioned sheet pushing-out means so as to stop.