JPS61106343A - Sheet stacking apparatus - Google Patents

Abstract

PURPOSE:To carry out multiple functional processes such as double sided copying by stacking sheets having one side copied on a pin tray and then supply again the sheet from the pin tray to a copier by a sheet resupply means. CONSTITUTION:When the tail end of a sheet passes by an auxiliary guide member 81, said member 81 is returned by its own weight to turn off a detecting switch SW1 and reverse a motor so that a pair of first discharge rollers 64 are supplied from the tray side toward a flapper 63, while the leading end of the sheet abuts against the end of the member 81 and is guided by same to a path 65. The first sheet is guided by a second flapper 66 to be sent to a pair of second discharge rollers 69. Since the upper and lower rollers are both rotated forward and a resupply roller 70 is in the lifted position, the sheet is discharged onto a fixed tray 65n by a pair of rollers 69 and once reversed by said pair of rollers 64 so that the sheets are received on a tray 65n with the copy surface being directed downward and guided to a path 68 for multiple copying.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a sheet stacking device equipped with a sheet sorting section capable of sorting and collecting sheets such as transfer paper, and more specifically, the present invention relates to a sheet stacking device equipped with a sheet sorting section capable of sorting and stacking sheets such as transfer paper. The present invention relates to a sheet stacking device that is used together with a forming device and can perform multiple functions such as sorting and collecting sheets on which images have been formed, forming images on both sides of the sheet, and forming multiple images on one side of the sheet.

(→ Conventional Technology) Recently, image forming devices such as copying machines (hereinafter referred to as copying machines) have a sheet sorting function for sorting and collecting copied sheets, a duplex function for forming images on both sides of the sheet, and a multiplexing function for forming images on one side of the sheet. There is a demand for multi-functionality and systemization of multiple functions for copying, and conventionally, these multi-functions have been built into the main body of the copying machine in advance, or separate from the main body of the copying machine, such as a sorting device, duplex device, etc. It is attached to support multi-functionality.

For example, as shown in FIG. 11, a copying device 1 includes a document table 2 that can slide back and forth with a document M placed thereon, a lens system LE fixed to a support member S of the device body, and a large number of It has two cassettes C1 and C2 on which sheets can be placed and which can be attached to and removed from the main body of the apparatus, and further includes a cylindrical photoreceptor 3 having a central axis extending perpendicular to the sheet surface, and a cassette near the periphery thereof. The arranged developing device 5, cleaner 6 and charging Wj
7 are integrally disposed on a frame 9, and these photoreceptor 3, developer 5, cleaner 6, and charger N7 constitute a unit 10 that can be inserted into and removed from the main body support member S. Further, a transfer charger 11 is provided below the unit 10.
, a conveying device 13 having separation rollers 12, etc. is provided, and the conveying device 13 is provided with a paper feed roller 15 and registration rollers 16 for feeding the sheets on the cassettes CI and C2, and a conveying bag. A fixing device 17 to which the transferred sheet is fed from [13] is provided. And the fixing device 17
A flapper 19 for changing the sheet feeding direction is disposed at the exit portion of the copying apparatus, and the flapper 19 transfers the sheet to a sheet classification value M20 separate from the main body 1 of the copying apparatus or an intermediate disposed within the main body 1 of the apparatus. It is selected and fed onto a conveyor belt 23 that leads to a tray 22. The sheet sorting device 20 has a large number of sheet storage pin trays 25, and these trays 25 can be transported up and down by a conveyor 26, and the paper feed rollers 2
7, the sheets are discharged and collected on a predetermined tray 25.

On the other hand, the intermediate tray 22 is installed in the lower stomach of the apparatus main body 1 and is inclined to ensure sheet loading and refeeding performance. A feeding roller 29 and a delivery roller 30 are provided.

Based on the above configuration, when the document table 2 moves, the document table 2
The original vJM placed above is irradiated by a light source, and the reflected light passes through the lens system LE and forms an image on the surface of the photoreceptor 3, which has been uniformly charged by the charger 7, to form a static f4 latent image. Then, based on the rotation of the photoreceptor 3 in the direction of the arrow, the electrostatic latent image forms a toner image at the developing device 5 position. On the other hand, the sheets loaded in the cassette CI or C2 are fed by the paper feed roller 15, aligned with the toner image on the surface of the photoreceptor by the registration roller 16, and furthermore, the toner image is transferred to the transfer charger 11. Transferred to the sheet surface. Further, the sheet carrying the toner image is separated from the photoreceptor 3 by a separation roller 12, and transferred to the fixing device 1 by a conveying device 13.
7 and is fixed in the fixing device 17. and,
In the case of single-sided copying, the flapper 19 is switched to the sheet sorting device side, and the copied sheet is discharged to a predetermined tray 25 by a paper feed roller 27, and the tray 25 is sorted in advance by a conveyor 26. The sheets are moved in a manner such that the sheets are sorted in a predetermined pattern.

On the other hand, in the case of double-sided copying, the flapper 19 is switched to the intermediate tray side. Therefore, the sheets copied on one side are guided to the intermediate tray 22 by the conveyor belt 23, and a predetermined number of sheets are stacked and accumulated on the tray 22. When the one-sided copying is completed, the sheet on the intermediate tray 22 is transferred to the feeding 6-
The sheet is switched back and fed from the rear end surface by the roller 29, and then copied by the feed roller 30 onto both sides of the photoreceptor 3 and the transfer charger 11 with the uncopied side facing up. The sheet is sent via the fixing device 17 to the sheet sorting device 20 by the flapper 19, where it is sorted in a predetermined pattern.

Further, as another example of the conventional copying apparatus 1', there is also one shown in FIG. The copying apparatus 1' also includes a document table 2, a cassette C4°C2, a lens system LE, a photoreceptor 3, a developing unit 5, a cleaner 6, and a band Ts, similar to the copy value W1.
The apparatus includes a unit 10 consisting of N7, a conveying device 13, a fixing device 17, and the like. Then, a reversing guide path 32 having a paper feed roller 34 is provided branching off to the path 31 from the fixing @ 17, and the reversing is further carried out by a flapper 33 to the ID path 32 and the path 35 to the sheet sorting device 20'. Can be switched. Further, a path 37 is provided which is guided from the reversing guide path 32 via a flapper 36, and the path 37 is guided to the intermediate tray 22' according to the sheet size by a large number of discharge ports 37m. on the other hand,
The sheet sorting device 20' is constructed separately from the main body of the copying apparatus 1', and is fixed to the main body of the apparatus with screws or the like. The sorting device 20' also includes a large number of trays 25'...
is fixed, and the discharge roller 39 of the device main body 1' is fixed.
Trays 25'...
The flapper 41... and paper feed roller 42 are moved at positions corresponding to the
・- is placed.

Based on the above configuration, the sheet transferred by the photoreceptor 3 and fixed by the fixing device 17 is guided to the path 31. In the case of one-sided copying, the flapper 33 is switched to the path 35 side, and the sheet is sent from the discharge roller 39 to the sheet sorting and mounting 20'. Then, depending on the predetermined sorting method, the sheets are collected in a predetermined tray 25' by the flapper 41 of the sorting attachment 20' and the paper feed roller 42. On the other hand, in the case of double-sided copying, the flapper 33 is switched to the reversing guide path 32 side, the single-sided copied sheet sent from the path 31 is guided to the guide path 32, and the sheet is further reversed by reversing the paper feeder 34. switch back. And flapper 36
Accordingly, the reversed sheet passes through the path 37 and is transferred to the intermediate tray 22.
A predetermined number of single-sided copy sheets are dropped onto the tray 22'. Further, the sheet on the intermediate tray 22' is sent by the feeding roller 29 and the sending roller 30 to the photoreceptor 3 portion with the upper surface of the uncopied surface, and is transferred to the upper surface of the sheet at this portion. The sheets that have been double-sided copied are then sent to the sheet sorting device 20' and sorted into each tray 25'.

(8) Problems to be Solved by the Invention Therefore, in the copying apparatus [1 main body (or special double-sided copying device), special intermediate trays 22, 22' are required, and the intermediate tray 22 is not suitable for sheet stacking. Since it is necessary to install the duplex copying device at an angle to ensure safety, or to install a reversing mechanism such as the reversing guide path 32 outside the intermediate tray, a large dead space is created in the main body of the device. The sheet sorting device 20, 20' becomes quite large, and the entire unit including the sheet sorting device 20, 20' becomes a fairly large device. Furthermore, as shown in FIGS. 11 and 1z, when a double-sided copying device is incorporated into the main body of the copying device 1, it is necessary to have a fairly robust structure in terms of strength as the main body of the device becomes larger. can be,
It also causes weight increase.

Furthermore, when troubleshooting problems such as paper jams, paper jams can occur over a wide range of locations because the copying machine main body, double-sided copying section, sheet sorting device, and sheet conveyance path are long and complicated. In addition, since the intermediate tray and conveyance part of the duplex copying device are built inside the device, it is not possible to see the paper jam from the outside, and work such as opening the cover is required. This makes troubleshooting very troublesome.

Furthermore, as shown in the above-mentioned conventional example, the intermediate trays 22, 22' are generally installed in the lower part of the device, that is, near the floor surface, and the user must bend down to clear paper jams, making it extremely inconvenient to use. It's getting worse.

In addition, single-sided copied sheets are stacked on the intermediate trays 22 and 22', but these sheets often curl due to the pressure and heat received during the fixing process, and the curled sheets are removed from the intermediate trays. When re-feeding, feeding errors such as electrical transmission are likely to occur, which, together with the increasing size and complexity of the copying apparatus, is a factor that reduces the reliability of the entire apparatus.

In addition, in addition to the multi-functionality and systemization of copying machines mentioned above, there has recently been a trend toward personalization, but copying machines that meet this trend are subject to limitations such as size, weight, price, etc. Therefore, there are not many functions provided in the main body, and for example, even the paper feed device is generally a single device or a device that only has a manual feed function. Therefore, in such personal copying machines, mini-sorters, optical cassettes, document feeders, etc. are added according to the user's requests, but each of these mini-sorters and other devices only has a single function. Although the main unit is small and low-priced, installing these devices one after another on the main unit would make the unit device as a whole quite large and expensive, making it difficult for personal devices. The benefits of this are not being taken advantage of.

(=) Means for Solving the Problem The present invention is aimed at solving the above-mentioned problems, and includes a sheet sorting section having a large number of sheet storage pin trays, which sorts sheets into each of these bin trays.・
A sheet stacking device capable of stacking sheets is characterized in that a sheet refeeding means is disposed facing at least one of these bin trays and capable of refeeding the sheets stacked on the bin tray. be.

(f) Function Based on the above-mentioned configuration, in addition to sorting and collecting sheets into each pin tray according to a predetermined pattern in the sheet sorting section, sheets with one side copied by the copying device are collected in a bin tray, and from the pickling bin tray. The sheet is fed again to the copying apparatus by the sheet refeeding means, and multifunctional processing such as 100-sided copying is performed.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First Embodiment First, a first embodiment will be described with reference to FIGS. 1 to 4.

As shown in FIG. 1, the copying device 9150 includes a document table 2, a light source L lens system LE, two cassettes C1C, and a cylindrical photoreceptor 3 disposed within the main body of the device. ing. Further, near the periphery of the photoconductor 3, there are two developing units 5 and 5' each containing toner of a different color, and a cleaner 6.
and primary idenli! ! 7, and a transfer charging unit 11 and a separation roller 1 installed at the tip of the conveyance unit [13].
2 are arranged. In addition, paper feed rollers 15. Is are arranged, and each route 51
52 to the pair of registration rollers 16, and is also guided to the pair of registration rollers 16 through a path 55 from a guide opening 53 opened in the lower surface of the apparatus main body 50. Further, a fixing device 17 is disposed at the rear end portion of the conveying device 13, and the fixing device 17 is further provided with a pair of ejection rollers 56.
A sensor S0 is installed to detect the passage of sheets.

On the other hand, a sheet stacking device 60 consisting of a sheet sorting section 57 and a sheet conveying section 59 is arranged facing the copying machine 50. The sorting section 57 of the sheet stacking device 60 has n-1 movable sheet storage pin trays 1. ．． 61□・・
61. , -1 are supported in a vertically movable manner, and
1 fixed pin trailer 1. l is placed at the bottom. Furthermore, a path 62 is formed in the sorting section 57 at a position that can be aligned with the ejection roller pair 56 of the copying apparatus main body 50, and the movable tray 61. ~61. ．． The sheet can be fed.

Note that the movable tray 61. ~61. l-, is a known drive mechanism consisting of a forward/reverse motor and a grooved cam (for example, Japanese Patent Application Laid-Open No. 56
-78769)). Also,
A route 65 is formed by being branched and selected by the first flapper 63, and the route 1565 is further branched into a route 67 to the fixed tray 65 selected by the 27th flapper 66 or a route 68 to the conveyance section 59. be done. Further, a second pair of discharge rollers 69 for discharging to the fixed tray 65° is disposed in the path 67, and furthermore, the pair of discharge rollers 69 and the fixed tray 65 are disposed.
1. .

A refeed roller 70 is disposed between the two.

In addition, in the sheet conveying section 59, three pairs of conveying rollers 711°712.7 are mounted on both side plates (not shown) constituting the lower frame.
13 is pivotally supported, and an adjusting roller pair 72 consisting of upper and lower biting rollers, which will be described later, is disposed between the second and third conveying roller pairs 71° and 7]3. Furthermore, guide plates 73□, 73□, 73. ,73
4 is installed, and the third conveying roller pair 713 is arranged so as to align with the guide port 53 of the main body of the copying device 50.

Note that guide rails are fixed to both side plates constituting the lower frame of the sheet transport section 59, and the sheet stacking device 60
It constitutes a guide when moving and leaving in the direction of arrow A, and is positioned so that the conveyance roller pair 713 is aligned with the guide port 53 and the path 62 is aligned with the discharge roller pair 56.

Further, as shown in FIG. 2, the upper guide plate 62a and the lower guide plate 62b constituting the path 62
A shaft 63a fixing the first flapper 63 is disposed between the upper and lower guide plates 62a and 62b, and the shaft 63a is supported by the side plates 75. has been done. Further, an arm 76 is fixed to one end of the 63m, and the arm 76 has a spring 7 at one end.
7 is tensioned, and the flapper 63 is biased to the solid line position, that is, the position where the path 62 is communicated with the pair of discharge rollers 64. Can be switched to a suitable position. Further, a large number of auxiliary guide members 81 are disposed in the upper part of the upper guide plate 62a in the shape of a comb so as to be rotatable around a shaft 80 extending between the side plates 75. and protrudes into the path 62 through the cutout hole of the upper guide plate 62a, allowing the sheet to flow toward the pair of discharge rollers 64, and allowing the sheet to flow toward the pair of discharge rollers 64.
The sheet being returned from is guided to path 65.

Further, a micro switch SW is disposed facing the auxiliary guide member 8101, and the switch SW is turned on by the upward rotation of the auxiliary guide member 81 based on the passage of the rate path 62. Detects the passage of. Further, the first discharge roller pair 64 includes an upper roller 64a and a lower roller 64b, and fixes the lower roller 64b and fixes the side plate 7.
A forward/reverse DC motor 82 is connected to the shaft supported by the roller 5, and the shaft fixing the upper roller 64a is interlocked with the lower roller shaft via a gear.

Note that the second flapper 66 is also similar to the first flapper 63,
It is biased by a spring to be guided to the second discharge roller pair 69, and is configured to be switched to the path 68 by a solenoid.

Further, as shown in FIG. 3, the second discharge roller 69 consists of an upper roller 69g and a lower roller 69b.
A shaft 83 that fixes the shaft 83 is supported by a side plate, and the transport roller 71 . 713 and in the opposite direction of rotation, that is, in FIG. 1, the lower roller 69b rotates counterclockwise and the lower transport roller rotates clockwise.
It is driven by a timing belt 85 and a gear 84.

Further, the shaft 86 fixing the upper roller 69a is interlocked with the lower roller shaft 83 via a spring clutch 87 and a gear train 87a1, and a spring clutch 88 and a gear train 88a.
The shaft 86 and therefore the upper roller 69a are connected to the spring clutch 87.8.
9, the lower roller shaft 83 is driven in the forward and reverse directions based on the forward rotation of the lower roller shaft 83. To the east, a bell crank 89 having arms 89a and 89b is rotatably supported on the upper roller shaft 86.
A refeed roller 70 is rotatably supported at the tip via a shaft 90. Further, the shaft 90 is connected to the timing belt 9
1, and the refeed roller 70 is rotated in synchronization with the upper roller 69a in the same direction. On the other hand, a spring 92 is tensioned at the tip of the other arm 89b of the bell crank 89, and a solenoid 95 is connected via a link arm 93 in a direction opposite to the spring biasing direction. Further, a backup link 97 is rotatably supported on a shaft 96 passed between the side plates, and an arm 9 formed at one end of the link 97
7a is connected to the solenoid link arm 93 together with the arm 89b through a long hole or the like. Further, the buffer tube link arm 97 has an auxiliary plate extending in the direction of the fixed tray 61 below the refeed roller 70 and pivotally supported by the bin 99 at the base of the fixed tray 61. 100
Therefore, the auxiliary plate 100 is rotated in the upward direction based on the backup link arm 97 in synchronization with the refeed roller 70, that is, as the refeed roller 70 descends, and the Refeed the sheet.

Further, as shown in FIG. 4, the adjustment roller pair 72 is composed of a single-moving lower roller 72a and a driven upper roller 72b, and is provided with a gripping force to sandwich the sheet between the two rollers by a biasing spring. Furthermore, the lower roller 721 is spline-engaged with a shaft 101 provided across both side plates, and the shaft 101 is connected to the drive chain 10 via an electromagnetic clutch 102.
It is linked to 3. Further, two circular guide plates 105 are supported on the lower roller shaft 101 so as to be able to slide together with the lower roller 72a, and a circular plate 106 is fixed on the circumference between the guide plates 105. Bin 107 is engaged.

Further, a servo motor 109 is fixed to the frame side plate, and the disc 106 is attached to the output shaft of the motor lO9.
is fixed, and therefore the lower roller 7 is fixed based on the motor 109.
2a can slide on the shaft 101. On the other hand, the driven upper roller 7
2b is slidably supported by the upper roller shaft 110,
A disk 111 is fixed to one 6'11 end of the upper roller 72b. The disc 111 is engaged with the guide plate 105, and therefore the upper roller 72b and the lower roller 72n are engaged with each other.
can slide in the axial direction integrally with the In addition, the adjustment roller pair 72
A macro f macro switch sw2 is disposed above the guide plate 733 on the slightly upstream side of the guide plate 73. The actuator is pushed up by the sort passing through, and the passage of the note is detected. Further, a photointerrupter PI is disposed on the notched side surface of the guide plate 734 slightly downstream of the adjustment roller pair 72, and the photointerrupter PI detects the side end surface of the sheet by blocking the transmitted light. do.

Note that each conveyance roller 71. , 712.71. Each of the lower rollers is driven by the main drive source of the sheet conveying section 59 by a chain 103 or the like, and the upper roller is interlocked with each lower roller by a gear.

Next, the operation of this embodiment will be explained.

First, using the sheet stacking device N60 of this example, a plurality of sheets n
A so-called sheet sorter (sorter) 4M! Explain Noh.

The sheet, one side of which has been copied in the main body of the copying device 50, is discharged from the pair of discharge rollers 56 to a path 62 in the sheet stacking device 6o. At this time, the first flapper 63 is set to the solid line position in FIG. 1, and the movable trays 611 to 61M
-, that is, the first movable tray 61.
is initially set to correspond to the discharge roller pair 64.

In this state, the first sheet from the paper 62 is transferred to the first movable tray 61 by the discharge roller pair 64. When copying and sorting n copies of documents in a predetermined pattern, for example, pages 8 to 2, the first movable tray 61. Immediately after the second movable tray 612 is collected, the movable tray is raised and the second movable tray 612 is aligned with the pair of discharge rollers 64. As a result, the second copy sheet is stacked on the second movable tray 612, and similarly, the n-1th copy sheet is stacked on the movable tray 61. −, is accumulated. For the nth sheet, the solenoid 79 is energized so that the first flapper 63 guides the path 65 and the 27th flapper 66 guides the fixed tray 61 . The nth sheet of the eighth page is transferred to a fixed tray 611 . by a pair of discharge rollers 69 . will be accumulated. At this time, the refeed roller 70 is at the raised position as shown by the solid line in FIG.
1. There is no problem with discharge to.

Similarly, n copies of the copy sheet of the th page are placed in each tray 61.
．． ~61. ．． Similarly, copy sheets up to the second page are stacked one after another in each tray.

Next, a case will be described in which double-sided copying is performed in which copies are made on both sides of a sheet. .

The operator issues an instruction to make double-sided copies of the number n of sheets, and the copying machine 5
When the activation switch 0 is actuated, the sheet sorting section 57 is set to the initial state as required, and the first flapper 63 is set to the chain line state, that is, the path 65 based on the energization of the solenoid 79, and the second flapper should be set to solid state. Then, the note copied on one side by the copying device 50 is transferred from the discharge roller pair 56 to the sheet 8Iiii! Device 6
When the sheet is introduced into the path 62 of No. 0, the sheet is guided by the first flapper 63 and led to the path 65, and further guided by the 27th flapper 66 to the path 67.

At this time, the spring clutch 87 is not engaged, and the spring clutch 88 is engaged, and the Shimoda roller 69b and the upper roller 69a are both rotated in the forward direction through the gear train 88a, that is, both rollers work together. Fix the sheet on the tray 65. The solenoid 95 is not energized, and the refeed roller 70 is in the raised position due to the spring 92. Therefore, the sheet guided to the path 67 is transferred to the fixed tray 65 by the second discharge roller pair 69. , are discharged and collected. This operation is repeated n times, and the n sheets with single-sided copies are placed on the fixed tray 6 with the copy side facing up.
It is loaded and accumulated on 5n. When the last n-th sheet passes through the detection sensor S0 of the copying apparatus main body 50 and its trailing edge is detected, the sheet is automatically Finally, one-sided copying is completed and preparations for copying the other side of the sheet begin, and the rotation of the discharge roller pair 69 of the sheet stacking device 60 is also stopped. Next, a signal to start copying on the other side of the sheet (double-sided copying signal) is issued to the copying device main body 50, and the solenoid 95 is energized to rotate the bell crank 69 clockwise to rotate the refeed roller 7°. While moving it downward, rotate the back associator printer 97 counterclockwise to lift up the auxiliary plate 100. Furthermore, the timing belt 85
etc., the lower roller shaft 83 is rotated in the normal rotation direction, and the spring clutch 87 is engaged and the spring clutch 88 is disengaged.
Rotation in the reverse direction is applied to the upper roller shaft 86 via the gear train 87n. As a result, the upper roller 69a rotates in the reverse direction, that is, in the direction of feeding the sheet from the fixed tray 611 to the path 62, and further rotates the re-feeding roller 70 in the same direction via the timing belt 91. Therefore, fixed tray 6
1. Specifically, the single-sided copied sheet stacked on the auxiliary plate 100 is sent to a pair of ejection rollers 69 by a refeed roller 70, and then sent to a pair of ejection rollers 69 by an upper roller 69a.
and is guided to the second flapper 66 to take the route 6.
8, and further the conveying roller 71 of the sheet conveying section 59,
sent to. At this time, even if sheets are fed double, they are separated based on the normal rotation of the lower roller 69b and the upper roller 69b
Only the sheet in contact with a is fed to the conveying roller pair 711. Then, the sheet is conveyed to the pair of conveying rollers 71. After sufficient time has elapsed to reach the recessed position, solenoid 95
is de-energized and the re-feed roller 70 is raised, the spring clutch 87 is disengaged and the spring clutch 88 is engaged, and the upper roller 69m is also rotated in the normal rotation direction by the gear train 8811. Refeeding of the th sheet is canceled. On the other hand, the first sheet that has been re-fed is transferred to the pair of conveying rollers 71. ．． 712, the detection switch SW2 is reached and the switch is turned on. Then, the electromagnetic clutch 10
2 is cut, the adjusting roller pair 72 is temporarily stopped just before biting the sheet, and the sheet forms a loop on the guide plate 733 between the conveying roller pair 712 and the adjusting roller pair 72. Then, after a predetermined period of time has elapsed, the dynamic clutch 102 is restarted and the mW flora 72 is rotated.
, Reylo 1. Correct the inclination of the seeds relative to the guide plate caused by refeeding, etc. Next, with the adjusting roller pair 72 biting the sheet, the servo motor 109 is driven to move the adjusting roller pair 72 in its axial direction until the sheet 1 side edge is detected by the photo ink printer PI. , adjust the lateral position (lateral registration) of the sheet in the direction of travel. At this time, if the photo interrupter PI does not detect the sheet even after a predetermined period of time has elapsed after the adjustment roller pair 72 is restarted, it is determined that the sheet is moving towards the back side (right side in Figure 4) and the adjustment is performed. Move the roller pair 72 to the front side (fourth
left side of the figure) until the interrupter PI detects the sheet, and if the interrupter PI detects the sheet before a predetermined time elapses after restarting the adjustment roller pair 72,
It is determined that the sheet is closer to the front side, and the adjustment roller pair 72 is once moved to the back side to remove the sheet from the interrupter pt, and then the rfIJ straightening roller pair 72 is moved to the front side in the same manner as described above. In this way, the adjustment roller pair 7 is in a state where the skew and lateral registration of the re-fed sheet are adjusted.
After a predetermined period of time has elapsed since the restart in Step 2, the drive to the sheet conveying section 59 is cut off to stop sheet conveyance, and the copying apparatus waits for a paper feed signal from the main body 50 of the copying apparatus. Then, after the operator performs an operation such as replacing the original on the document table 2, when the start switch of the copying apparatus main body 50 is activated again, the drive motor of the sheet conveying section 59 is activated at the appropriate timing with the apparatus main body 50. The adjustment roller pair 72 and the conveyance roller pair 713 rotate again to move the sheet from the guide port 53 to the path 55 of the apparatus main body 50.
to be introduced. Then, a toner image is transferred to the back side (the side that is not copied) of the sheet using the photoreceptor 3 and the transfer charger 11, etc., and further fixed by the fixing device 70, and then the sheet that is copied on both sides of the sheet is transferred. is discharged to the sheet stacking device 60 by a pair of discharge rollers 56. Then, based on the sheet classification function of the sheet classification section 57 described above, the double-sided copy sheets are sorted into each pin tray 1. ~61. ．． are sorted according to a predetermined pattern.

Next, a case will be described in which multiple copying is performed in which two types of images are overlapped and copied on one side of a sheet.

When the operator instructs the main body 50 of the copying machine to perform multiple copying of the number n of sheets and activates the start switch, the first discharge roller pair 64 is rotated in the normal direction, and the first flapper 63 and the second flapper 66 are set to the solid line state. The movable tray 6
1. ~65. ．． −． Sheet sorting section 57
Set to initial state. Then, in the copying machine 50, 1
When the sheet on which the th image has been copied is introduced from the ejection roller pair 56 into the path 62 of the sheet stacking device 1160, the sheet is guided by the first flapper 63 and led to the first ejection roller pair 64. Due to normal rotation of the pair 64, the movable tray 61. sent to the top. Further, when the sheet passes through the path 62, the leading edge of the sheet pushes up the auxiliary guide member 81, and further, based on the rotation of the guide member 81, the detection switch SW is turned on to detect the passage of the leading edge of the N sheet, Further, when the rear end of the sheet passes through the auxiliary guide member 81, the guide member 81 returns due to its own weight, and the detection switch S
W1 is turned off at the position where the rear end of the sheet is held between the discharge roller pair 64. Then, the forward/reverse DC motor 82 is reversed, and the first ejection roller pair 64 is now fed from the tray side toward the flapper 63, but at this time, the leading edge of the sheet (
The rear end of the sheet until it is fed backwards) is the auxiliary guide member 81.
It abuts and is guided by the vertical portion 81a at the tip and is led to the path 65. At this time, the time that the detection switch SW is on is measured by a clock counter, and the size (length) of the sheet is detected. At the same time, from the start of reversal of the first discharge roller pair 64, the counter measurement value T is increased by a margin a.
By subtracting the added value (T+a) using the same clock counter, it is possible to detect the separation of the sheet from the discharge roller pair 64 during reversal and reverse feeding, and after detecting this separation, the forward/reverse rotation DC motor 82 is rotated in the normal direction again. and prepare for the next sheet.

On the other hand, the first sheet guided to the path 65 is guided by the second flapper 66 and sent to the second discharge roller pair 69. At this time, the second discharge roller pair 69 is connected to the upper and lower rollers 69a by the engagement of the spring clutch 88. , 69b are both in normal rotation, and the refeed roller 70 is in the raised position, so the sheet is fixed by the discharge roller pair 69.65. is discharged to the top. Therefore, in the multiple copying state, the first
Since the sheet is reversed once (switch pack) by the discharge roller pair 64 of the fixed tray 65. , on which the sheets are stacked with their copy side down. The above operation is repeated n times, and the fixed tray 61. , after one sheet is stacked and accumulated on top of the sheet, the sheet conveying section 59 is driven in the same way as in the case of double-sided copying, and the copying apparatus main body 50 further moves one sheet to
The second image is superimposed on the side that has been copied twice. Then, based on the sheet classification function of the sheet classification section 57 described above, multiple copy sheets are sorted into each pin tray 1. ~61. .

are sorted according to a predetermined pattern.

Furthermore, when the operator instructs multiple copying for only one copy, that is, when multiple copying for one copy without a sort mode is required, the solenoid 79 is energized to switch the first flapper 63 to the chain line position, and the first flapper 63 is switched to the chain line position. 27 ramper 66 is also switched and held at the chain line position. In this state, the sheet on which the first image has been copied is guided to the path 62 by the discharge roller pair 56, the sheet is guided by the flapper 63 to the path 65, and further guided by the flapper 66 to the path 68. guided by. The sheet is then transported by the sheet transport section 59, skew correction and compensation registration adjustment are performed by the adjustment roller 72, and then a second image is superimposed and copied. Then, the solenoid 79 is turned off, the first flapper 63 is returned to the solid line position, and the multiple copied sheets are discharged and stacked onto the uppermost movable tray 61°.

(F-2) Second Embodiment Next, another embodiment will be described with reference to FIGS. 5 to 7. Note that the copying apparatus main body 50 is the same as in the previous embodiment, so the same reference numerals are given and the description thereof will be omitted.

The sheet stacking device 60 includes a sheet sorting section 57 and a sheet conveying section 59, as shown in FIG.

The sheet sorting section 57 has a large number of sheet storage bins, (6
1, ~61. upper and lower pulleys 11, which are rotatably supported by both side plates constituting the frame.
5,116 are arranged, and these pulleys 115,1
Bell I-117 is wrapped around 16. Furthermore, the sixth
As shown in detail in the figure, around the belt 117 are a number of conveyor rollers 119, 120, 121. 21o are arranged at a predetermined interval so that the rollers 21o come into elastic pressure contact with the belt and follow the rotation, and a guide plate 122 is arranged between these rollers to constitute a sheet conveying section 118123. ing. Furthermore, a pipe #1125 for receiving sheets from the pair of ejection rollers 56 of the copying apparatus main body 50 extends so as to communicate with the transport path 123, and also extends along the transport path 123.
23, each tray 61°~61. ．． A large number of flappers 1261 to 126o that can select and branch sheets in the direction
is installed. As shown in FIG. 7, each flapper 126 is fixed to a shaft 127 rotatably indicated on both side plates 75, and furthermore, each flapper 126 is fixed to both ends of an arm 129 fixed to the end of the shaft 127. A spring 130 and a solenoid 131 are connected to the spring 130 and a solenoid 131.
The urging force prevents the sheet from entering the tray path 132 and guides the sheet to the path 123 along the belt 117, and the excitation of the solenoid 131 guides the sheet to the tray path 132. In addition, each path 132 .conducts sheets to each tray. ~
32, a light emitting element 133a and a light receiving element 1, respectively.
A sheet detection sensor 133 consisting of 33b is installed, and each path 1321-132. , a pair of ejection rollers 1351 to 1 that can carry out sheets toward each tray are provided at the ends of the .
35o is provided. In addition, these discharge roller pair 1
35 consists of an upper roller 135a and a lower roller 135b, as shown in FIG. and follow the rotation.

Further, each lower roller shaft 136 is connected to a forward/reverse geared motor 140 via a gear 139, so that it can rotate in forward and reverse directions. ~61. It constitutes a sheet refeeding means for refeeding the sheets accumulated in the. Further, a drive source such as a motor is directly connected to the shaft that fixes the lower pulley 116, and the drive source is simultaneously connected to the sheet conveying section 5.
It is also the driving source for 9.

The sheet conveyance section 59 has a conveyance path 141 aligned with the discharge path #144 extending from the conveyance path 123, and a core section I#1141 has a plurality of conveyance paths driven by a gear train, chain, etc. from a drive source. Conveyance roller pairs 1421 to 14
2S and guide plates 143 to 1434 are provided therebetween. Note that among these pairs of conveying rollers, the intermediate pair of conveying rollers 1423 and 1434 are so-called oblique rollers, and are configured to correct the position of the sheet in a direction perpendicular to the conveying direction of the sheet with respect to a reference. Furthermore, the final transport roller pair 1425 is aligned with the guide port 53 of the copying apparatus main body 5o. Further, a third cassette c3 can be attached to the other end of the sheet conveyance section 59, and the third cassette c3 is guided from the path 1145 to the final conveyance roller pair 1425 by the paper feed roller 15'.

Next, the operation of this embodiment will be explained. Note that the so-called sheet sorting (sorter) ffl function for sorting copied sheets in a predetermined pattern is the same as a known function, so a description thereof will be omitted.

First, a case will be described in which m pages of a document are copied onto both sides of a sheet to produce n copies of a double-sided copy sheet.

The operator issues an instruction to make double-sided copies of the number n of sheets, and the copying machine 5
When the start switch 0 is activated, the first page of the original placed on the original platen 2 is copied by the apparatus main body 50 and introduced from the ejection roller pair 56 to the path @125 of the sheet stacking device 60. At this time, a sheet detection sensor S near the discharge roller pair 56 in the fixing device 17. When the passage of the leading edge of the sheet is detected, the sensor signal is input to a microprocessor unit (hereinafter abbreviated as MPU), and the MPU outputs a signal to excite the solenoid 131 of the first stage flapper 1261. The flapper 1261 is switched and held at the position indicated by the chain line in FIG. The forward/reverse rotation motor 140 is sent a normal rotation number, and the roller pair 13 is
5□ rotates in the normal rotation direction to eject the sheet toward the tray. Therefore, the first sheet is transferred to the belt 117 and the conveyor rollers 119, 120, 121. The first stage flapper 126. is guided by a pair of discharge rollers
35, and is held between the pair of rollers and transferred to the first tray 61. discharged in the direction. And the tray path 132
．． When the sheet detection sensor 133 detects the leading edge of the sheet, the MPU issues a signal to stop the forward/reverse motor 140 after a time corresponding to the length of the sheet has elapsed, and the first stage ejection roller pair 135 is activated. ．． stops with the trailing edge of the sheet held in place. Next, the second sheet is the detection sensor S. When detected by the first stage flapper 135, the flapper side path 132. At the same time, the second-stage flapper 1352 is switched to the position communicating with the tray-side path 1322 and held, and the second-stage ejection roller pair 1352 is rotated in the normal rotation direction. be rotated. As a result, similarly to the first sheet, the second sheet is held in a state where its rear end portion is held between the second stage discharge roller pair 135□. Similarly, 3
The third sheet is the third stage ejection roller pair 135. sandwiched between
The n-th sheet is then held between the n-th discharge roller pair 135. Next, when the second page of the document is placed on the document table 2 and a copying operation is started, the first stage flapper 126 is first switched to the position shown by the chain line in FIG. The forward/reverse rotation motor 140 is driven in the reverse direction. Then, the discharge roller pair 1
The first sheet held by 351 is on the conveyance path 12.
3 and 140 to the sheet conveying section 59, and further guided to the guide port 53 of the copying apparatus main body 50 by conveying roller pairs 1421 to 1455 of the conveying section 59. Then, the second page of the original is copied onto the uncopied side by the copying apparatus main body 50, and the double-sided copied sheet is sent from the discharge roller pair 56 to the sheet stacking device 60. At this time, the detection sensor S is used as described above. Upon detection of the passage of the sheet, the first stage discharge roller pair 135 is rotated in the forward rotation direction, and the first stage flapper 1261 is moved to the tray side path 132. It is held in such a way that it leads to. Therefore, the double-sided copied sheet is transferred to the flapper 126. The paper is guided by a pair of discharge rollers 135°, and is discharged onto the first tray 61□ by the pair of rollers 1351. Note that this time, the sheet detection sensor 133 detects the sheet from the discharge roller pair 135.
It is detected that the sheet has completely passed through the first tray 61. The rotation of the pickling roller pair 135I, which has been completely discharged and loaded on top, is stopped. Similarly, the uncopied side of the second sheet held between the pair of discharge rollers 135□ on the second stage is copied, and the second sheet on which both sides have been copied is placed on the second stage. The paper is discharged and loaded onto the tray 61°. Similarly, the nth double-sided sheet is placed in the nth tray 61. , be discharged and loaded onto the l. Thereafter, the copying from the third page to the m-th page is performed sequentially and repeatedly in the same way as the double-sided copying of the first and second pages, and finally n copies of the double-sided copy sheet for page m are placed in each tray 61. ．． ~61. All copying operations are completed.

Next, a case of performing multiple copying in which multiple images are overlapped and copied on one side of a sheet will be described.

As in the case of double-sided copying, first, a sheet with the first original copied on one side is passed through each ejection roller pair 135. ~135, to hold and hold. In addition, when multiple copies are made, the lowest tray 61
Since the tray 61.o (not necessarily the lowest tray) is used as the reversal path, the tray 61. It is necessary to leave it open.

Then, when the second document is placed on the document table 2 and the start switch is activated to make multiple copies, the first stage flapper 1
261 is switched to the position indicated by the chain line in FIG. 6, and the first stage discharge roller pair 135. is reversed, and the roller pair 135
1 is fed to the conveyance path 123.

Also, at the same time as the start switch is activated, the flapper 1 of the nth stage is activated.
26o is switched to the position indicated by the chain line in FIG. 6, and the nth stage discharge roller pair 135. , is maintained in normal rotation. Therefore, the sheet conveyed through the conveyance path 123 by the belt 117 is transferred to the discharge roller pair 135.degree. by the nth stage flapper 126.degree. Further, based on the normal rotation of the pair of rollers 135°, the paper is further sent in the direction of the tray 61°. Then, as described above, after the leading edge of the sheet is detected by the sheet detection sensor 133 and a time corresponding to the length of the sheet has elapsed, the forward/reverse motor 140 is stopped, and the ejection roller pair 135
, stops with the trailing edge of the sheet held in place.

Further, the forward/reverse rotation motor 140 is reversely rotated, and the discharge roller pair 135 . , the sheet held between the two is sent out again to the conveyance path 123, whereupon the sheet is reversed once and the copy side is placed downward.vkf4461! I becomes the tip (switch pack) from the path 144 to the sheet conveying section 5
9 is sent to the transport HRi 141.

Then, each of the conveying rollers 142 of the sheet conveying section 59, -
1425, the single-sided copy sheet is guided to the guide port 53 of the copying apparatus main body 50, and the second original is superimposed on the side being copied in the apparatus main body 50 and copied. Furthermore, similarly to double-sided copying, the rate at which multiple copies have been made is transferred to the first tray 61. Discharged to 8! 7>f
The images are copied multiple times and discharged and placed on the second tray 612, and this process is repeated one after another.

(G-3) Third Embodiment Next, another embodiment will be explained with reference to FIGS. Reference numerals are given and explanations are omitted.

The sheet stacking device 160 includes a sheet sorting section 57 and a sheet conveying section 59, as shown in FIG.

The sheet sorting section 57 has a large number of sheet storage pin trays 1.
．． ~61. ．． are installed, and the upper and lower pulleys 11
5 and 116 are rotatably arranged, and a belt 117 is wound around these pulleys 115 and 116. Furthermore, as shown in detail in FIG.
are arranged at a predetermined interval so as to be elastically pressed against the belt and follow the rotation, and a guide plate 122 is arranged between these rollers to form a sheet conveyance path 123. Furthermore, a path 125 for receiving sheets from the pair of ejection rollers 56 of the copying apparatus main body 50 extends so as to communicate with the transport path 123.
3, each tray 61□~61. A large number of flappers 1261 to 126. which can select and branch sheets in different directions. , are each conveyance roller 121. It is rotatably supported on a support shaft of ~121o. Note that, as in the second embodiment, each flapper 126 has a spring that prevents the sheet from entering the tray and guides it to the path 123 along the belt 117, and a solenoid 131 that is energized to move the sheet along the tray path. It is switched to the dashed line position leading to 132.

Nao, each tray 61. 〜61 each have a light emitting element 1
A sheet detection sensor 133 consisting of a light receiving element 33a and a light receiving element 133b is installed. Then, each conveyance roller 121
Arms 1501 to 1501 to 121o are attached to the spindles of 1 to 121o,
is rotatably supported, and a refeed roller 151. is provided at the tip of the arm. ~151° is arranged, and
A clockwise biasing force is applied by a torsion coil spring (not shown), and the refeed roller is biased to a position away from the tray. Note that these refeed rollers 1
511-151. are transport rollers 1211 to 12, respectively.
11[deg.] via a chain or gear train (not shown), and can rotate in a direction to send out the sheet on the tray along the transport path 123ζ in synchronization with the rotation of the transport rollers 1z11 to 121o. On the other hand, the bottom of each tray 611 to 61, l is an auxiliary plate 153 rotatably supported by a bin 152, and furthermore, below these auxiliary plates 153 are backup links 1551 to 155o. It is rotatably supported by a support shaft 156. and,
The backup links 155, -155. one end arm and the refeed roller support arm 1501-150. are connected via links 157 and 157o, respectively, and when the arm 150 is rotated downward (counterclockwise), the backup link 155 is interlocked and rotated upward (clockwise). Furthermore, the user backup link 155, ~
155. , each has a solenoid 1 on one end of the arm.
59. ~159o have been disconnected, and the refeed rollers 1511~151 and the auxiliary plate 1 are activated by energizing the solenoid.
53 can be switched to the refeeding position (see bottom tray 61., part in FIG. 10). Furthermore, the shaft to which the lower pulley 116 is fixed has a V! The driving source is directly connected to the sheet conveying section 59 at the same time.
It is also the driving source for The sheet conveyance section 59 has a conveyance path 141 that is aligned with a discharge path 144 extending from a conveyance path 123, and the path 141 includes a large number of conveyance rollers driven by a gear train, a chain, etc. from a drive source. Pairs 1421 to 1424 and guide plate 143 between them
．． ~143. is installed.

Note that among these pairs of conveyance rollers, the intermediate conveyance roller pair 1
423 and 1434 are so-called diagonal rollers, which are configured to correct the position of the sheet 1- in the direction perpendicular to the sheet conveyance direction with respect to a reference, and the final conveyance roller pair I424 is located on the main body of the copying machine. 50 information gates 5
It is consistent with 3. Furthermore, a third cassette C3 can be attached to the other end of the sheet conveying section 59, and the sheets are guided from the cassette C3 through a path 145 to a final conveying roller pair 1425 by a paper feed roller 15'. .

Next, the operation of this embodiment will be explained.

First, a case will be described in which m pages of a document are copied onto both sides of a sheet to produce n copies of a double-sided copy sheet.

The operator gives an instruction to make double-sided copies of the number n of sheets and copies the copy group W5.
When the start switch 0 is activated, the first page of the document placed on the document table 2 is copied by the apparatus main body 50 and introduced from the ejection roller pair 56 into the path 125 of the sheet stacking device 60 . At this time, when the passage of the leading edge of the sheet is detected by the sheet detection sensor S0 located near the discharge roller pair 56 in the fixing device 17, the sensor signal is input to the MPU,
A signal for exciting the solenoid of the first-stage flapper 1261 is output from the MPU, and the flapper 1261 is switched and held at the position indicated by the chain line in FIG. 10, where it communicates with the tray side path 1321 side. Therefore, the first sheet is belt 117
and the first stage flapper 126 . is guided by the tray path 132
1 to the first stage tray 61. discharged to the top. Next, the second sheet is the detection sensor S. When detected by the first stage flapper 135. is returned to the solid line position in FIG. 10 where communication with the tray side path 1321 is blocked, and
The second stage flapper 1352 is switched and held at a position communicating with the tray side path 1322. As a result, the second sheet is placed in the second tray 612 in the same way as the first sheet.
is discharged. Similarly, the third sheet is ejected to the third tray 613, and the nth sheet is ejected to the nth tray 61. is discharged. Next, when the second page of the original is placed on the original platen 2 and the copying operation is started, all the flappers 1261 to 126 . is returned to the position indicated by the solid line in FIG.
26, is returned), then the first stage solenoid 15
9 is energized, moves the backup link 1551 clockwise to lift up the auxiliary plate 153, and rotates the arm 1501 counterclockwise via the link 157 to move the re-feed roller 1511. The tray 61 comes into contact with the upper sheet.Therefore, by rotation of the refeed roller 151, the sorted material is sent to the conveyance path 123, and further to the conveyance path 14□4.
The sheet is guided to the sheet conveying section 59 through the conveying section 59.
It is guided to the guide port 53 of the copying apparatus main body 50 by the pair of removal rollers 142 to 1454. Then, the copying device main body 5
The second page of the original is copied onto the uncopied side by o, and the double-sided copied sheet is transferred to a pair of ejection rollers 56.
The sheet is then sent to the sheet stacking device 60.

At this time, the sheet detection sensors 133a and 133b detect the first tray 61. When it is detected that the sheet has been ejected from the solenoid 1591, the excitation of the solenoid 1591 is canceled and the refeed roller 1511 is returned to the normal position where it is located above and the auxiliary plate 153 is located below.
Based on the sheet passage detection, the first stage flapper 12
61 is held so as to lead to the tray side path 132.

Therefore, the double-sided copied sheet is guided by the flapper 1261 and placed in the first tray 61. is discharged to the top. Similarly, the uncopied side of the second sheet stored on the second tray 61□ is copied, and the second sheet with double-sided copies is transferred to the second tray 61□. Discharged to 612
loaded. Similarly, the nth double-sided sheet is placed in the nth tray 61. It is discharged and loaded on top. Thereafter, the copying from the third page to the m-th page is performed sequentially and repeatedly in the same way as the double-sided copying of the first and second pages, and finally n copies of the double-sided copy sheet for page m are placed in each tray 61. ．． ~61. ．． All copying operations are completed.

Next, a case of performing multiple copying in which multiple images are overlapped and copied on one side of a sheet will be described.

As with double-sided copying, first, place the sheet with the first original copied on one side in the first tray 61. It is discharged and accumulated on top. Then, when the second document is placed on the document table 2 and the multiple copy start switch is activated, the first stage flapper 126. is switched to the dashed line position in Figure 10, and the first
The stage solenoid 1591 is energized and lifts the auxiliary plate 153 of the first stage tray 61 and the re-feed roller 1.
51, so that the sheets on the tray 61□ are fed to the conveyance path 123. Simultaneously with the actuation of the start switch, the nth stage flapper 126o moves the sheet to the tray path 132. , and thus the sheet conveyed by the belt 117 along the conveyance path 123 is transferred to the nth stage flapper 126 . 1, the paper is discharged and collected on the tray 61o. Then, the sheet detection sensor 133 detects the sheet in the nth tray 61. When the nth stage solenoid 159. (not shown) is energized, the auxiliary plate 153 is lifted by the backup link 155o, and the arm 150° is lowered to move the refeed roller 151o to the tray 61. , more specifically, contacts the sheet on the auxiliary plate 153 and transports the sheet R*
123, whereby the sheet is reversed once,
Conveying path 1 of the sheet conveying unit 59 from the MR 144 with the copy side facing down and the rear end side being the leading edge (switchback)
41. Then, the single-sided copy sheet is guided to the guide port 53 of the copying apparatus main body 50 by each of the transport rollers 1421 to 1424 of the sheet transport section 59, and
The second original is superimposed on the side that is being copied. Furthermore, as in both W1 copying, the multiple copied sheets are transferred to the first tray 61. is discharged and loaded.

In the above description, the first tray (uppermost tray 611) and the nth tray (lowermost tray) are used for multiple copying, but it is of course possible to use other trays.

(g) Details of the invention As explained above, according to the present invention, the sheet.

Sheet storage bin tray of sorting section 57, 61. ~61. .

Sheet refeeding means 70.135. capable of refeeding the sort collected in the pin tray facing at least one of the pin trays.
~135. , 151. ~151o is installed, it is equipped with multiple functions such as sheet NI function, Cζ double-sided copying function and/or multiple copying function, but does not require intermediate trays, reversing paths, etc. that were previously required. In addition, by reducing the dead space caused by the intermediate tray and the reversing path, it is possible to achieve significant downsizing, simplify the structure, reduce weight, and reduce the cost. can be manufactured. In addition, the sheet classification function, double-sided copying function, and multiple copying function are available in Pintrayro 1. ~61. ．． can be used in common, the flow of sheets can be easily checked from the outside, and the troubleshooting work for problems such as sheet jams can be done almost the same for each function, and the handling work itself is also simple. This can improve usability. Furthermore, Pintreiro 11-61. Since sheets are re-fed by the sheet stacking device 60 having a The sheet can be re-fed at any time, improving the reliability of the unit itself and further improving usability. Also,
It can be easily added to a personal type copying apparatus, and a single sheet stacking device 60 according to the present invention can be provided with multiple functions. ．． Sheet feeding means (cassette)
It can also be used as a personal computer, making it multi-functional while taking advantage of the advantages of a personal computer.

[Brief Description of the Drawings] Figures 1 to 4 are diagrams showing a first embodiment of the present invention, in which Figure 1 is an overall front view, Figure 2 is a perspective view showing a seat path switching section, and Figure 3 is a perspective view showing a seat path switching section. 4 is a perspective view showing a sheet refeeding portion, and FIG. 4 is a perspective view showing an adjustment roller portion. 5 to 7 are diagrams showing a second embodiment of the present invention, in which FIG. 5 is an overall front view, FIG. 6 is a front view showing a sheet sorting section of a sheet stacking device, and FIG. 7 is a sheet FIG. 3 is a perspective view showing a route switching portion. Furthermore, FIGS. 9 and 10 are views showing a third embodiment of the present invention, with FIG. 9 being an overall front view and FIG. 10 being a front view showing a sheet sorting section of a sheet stacking device. FIGS. 11 and 12 are overall front views showing different conventional examples. 50... Copying device, 57... Sea 1-classification section,
59 - Sheet transport section, 60... Sheet stacking device, 611-61.・・・Seat storage pin tray
, 63, 66.126. ~126. --Flapper,・69,70,135. ~1351. l. 151, ~151o・Sheet refeeding means 1985 03
Patent Application No. 226284, dated May 26, 1982, 2, Title of the invention: Sheet stacking device 3, Relationship with the person making the amendment Patent applicant address: 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (name) (100 ) Canon Co., Ltd. Representative Ryu Sanbe 4 Agent Address 7-39-10 Nishi Kamata, Ota-ku, Tokyo 144
No. (shipment date: February 26, 1985) (1) Change "is" from line 6 of page 51 of the specification to "is,"
8 is a side view showing the pair of discharge rollers." The power of attorney has already been submitted in the form of procedural amendment dated November 29, 1982.

Claims (1)

[Claims] (1) In a sheet stacking device that is equipped with a sheet sorting section having a large number of sheet storage bin trays and is capable of sorting and stacking sheets into each of these bin trays, the sheet stacking device faces at least one of the bin trays and the sheets are stacked in the bin tray. A sheet stacking device characterized by being provided with a sheet refeeding means capable of refeeding sheets.