JP3581482B2 - Sheet material reversing conveyance device and image forming device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sheet material reversing / conveying apparatus for reversing a sheet material in the middle of a path for conveying the sheet material, and for example, to a sheet material reversing / conveying apparatus used for an image forming apparatus such as a copying machine and a printing machine.
[0002]
[Prior art]
Conventionally, in a sheet material reversing and conveying apparatus used in an image forming apparatus such as a copying machine, as shown in FIG. 6, a sheet material S sent along a conveying path is switched back by a pair of carry-in rollers 51 and 52. a, and the sheet material S is further fed into the switchback unit a by the forward rotation (the direction of the arrow b in the drawing) of the pair of conveying rollers 54 and 55 provided in the switchback unit a. When the trailing end of the sheet material S is detected by the detection sensors 56 and 57, the pair of transport rollers 54 and 55 provided in the switchback section a reversely rotate, and the reverse rotation of the pair of transport rollers 54 and 55 is performed. The sheet material S is reversely fed (in the direction of arrow c in the figure), and is returned to the transport path again by the pair of unloading rollers 52 and 53. The reversal of the sheet material S is performed by this series of operations.
[0003]
In FIG. 6 , reference numerals 51, 52, and 53 denote triple rollers. As described above, the rollers 51 and 52 function as a carry-in roller pair, and the rollers 52 and 53 function as a carry-out roller. The detection sensors 56 and 57 are disposed upstream of the carry-in roller pairs 51 and 52 for detecting the rear end of the sheet material S. Of the pair of transport rollers 54 and 55, the transport roller 54 is a drive roller that rotates forward and reverse, and the transport roller 55 is a driven roller that is pressed against the roller 54 and is driven to rotate.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional example, the sheet material S is reversed by the forward / reverse rotation (the direction of the arrows b and c in the figure) of the pair of conveying rollers 54, 55. It is difficult to carry in the next sheet material S during the rotation (in the direction of the arrow c in the figure). That is, there is a problem that it takes time to turn over the sheet material.
[0005]
Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to carry out the next sheet material at the time of reverse rotation of the transport roller for reversely transporting the sheet material, and perform image forming processing. It is an object of the present invention to provide a sheet material reversing and conveying device suitable for an image forming apparatus that performs a high speed operation.
[0006]
[Means for Solving the Problems]
A typical configuration of the present invention for achieving the above object includes a reverse feed roller that rotates in a direction opposite to the feed direction to reverse the fed sheet material, and an upstream side from the reverse feed roller. Switching means for guiding the sheet material to be sent and the sheet material to be fed back, and adjusts the sheet feeding force by the reverse feed roller in accordance with the switching operation by the switching means. When the peripheral speed of the transport roller upstream of the reverse feed roller is V1 and the peripheral speed of the reverse feed roller is V2, the relationship between the peripheral speeds of the two rollers is V1 ≧ V2. So that the driving force is transmitted to the reverse feed roller via a torque limiter, and when a torque greater than a set value is applied to reversely feed the sheet material, the reverse feed roller stops. Alternatively, it rotates in the same direction as the transport roller. Characterized in that the.
[0007]
Further, as other representative means, a reverse feed roller that rotates in a direction opposite to the feed direction to reverse the fed sheet material, and a feed roller that is located upstream of the reverse feed roller and fed. Switching means for guiding the incoming sheet material and the sheet material to be conveyed backward, wherein the reverse feeding roller is pressed against a conveying roller rotating in the feeding direction to form a nip on the discharge side, and the switching is performed. The rotating member provided in the means adjusts the sheet material conveying force by the reverse feed roller by making contact with and separating from the reverse feed roller pressed against the transport roller in accordance with the switching operation by the switching means. It is characterized by having such a configuration .
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a sheet material reversing and conveying apparatus to which the present invention is applied will be specifically described with reference to the drawings. Here, first, as a reference example, a configuration in which a torque limiter is not provided in a reverse feed roller will be described, and then, an embodiment of the present invention will be described with reference to the description of the reference example. In the following description , a sheet material reversing and conveying apparatus used in an image forming apparatus such as a copying machine will be described as an example.
[0009]
( Reference example )
A sheet material reversing and conveying apparatus according to a reference example will be described with reference to FIGS. First, a schematic configuration of the image forming apparatus will be briefly described with reference to FIG. As shown in FIG. 3, an automatic document feeder 2 for automatically circulating a document is provided on the upper surface of the image forming apparatus 1, and a face-up tray 22 and a plurality of face-down discharge trays are provided downstream (left side in the figure). A sheet material reversing and conveying device 10 having 26 is installed.
[0010]
The image forming apparatus 1 uses a well-known electrophotographic method, and detailed description thereof is omitted here. However, an image of a document positioned on the platen glass 3 is transferred onto the photosensitive drum 4 by an optical system (not shown). An image is formed, a visible image (toner image) is formed by a developing device 5 provided around the drum 4, transferred to a sheet material by a transfer device 6, and permanently fixed by a fixing device 7. .
[0011]
The sheet material on which the image forming process has been completed as described above is normally discharged and stacked on the face-up tray with the image surface facing upward by the discharge roller pair 8. However, when images are formed in the page order (for example, 10 pages from 1 page), if the sheets are sequentially stacked with the image side up, the sheet material is in the reverse order to the page order. Will be loaded. In order to arrange them in the order of pages, a sheet reversing and conveying apparatus 10 to which the present invention is applied as shown in the drawing is mounted near the discharge port 9 of the image forming apparatus 1. Thereby, the sheet material is sequentially discharged and stacked on the face-up tray 22 with the image side up when the image formation is performed in the order opposite to the page order, and when the image formation is performed in the page order. The sheet material is sequentially discharged and stacked on one of the face-down trays 26 in a state where the image side is turned upside down.
[0012]
The sheet reversing and conveying apparatus 10 is configured to adjust the sheet conveying force by the reverse feed roller in accordance with a switching operation by a switching unit described later. Specifically, when the switching means having a rotating member at a position facing the reverse feed roller is switched to the conveyance path to the face-up discharge port, the rotary member contacts the reverse feed roller and the face-down discharge port The rotation member is separated from the reverse feeding roller when the conveyance path is switched to the conveyance path. Hereinafter, a sheet reversing and conveying apparatus to which the present invention is applied will be described in detail with reference to the drawings. FIG. 1 is a sectional configuration view of a sheet material reversing and conveying apparatus to which the present invention is applied, and FIG. 2 is a partially enlarged view of the sheet material reversing and conveying apparatus.
[0013]
In FIG. 1, reference numerals 11, 12, and 13 denote conveying roller groups, and a plurality of conveying rollers are arranged on the same circumference of the conveying roller 11 which is driven and rotated in one direction (in the direction of the arrow in FIG. Rotatable rollers 12 and 13 are pressed against each other. That is, the transport roller 11 and the roller 12 that is in pressure contact with the upper side of the roller 11 function as a carry-in roller pair that carries in the sheet material S, and the transport roller 11 and the roller 13 that is in pressure contact with the lower part of the roller 11 are pressed. Functions as an unloading roller pair for unloading the sheet material S.
[0014]
Numeral 14 denotes a flapper as a switching means, which is disposed downstream of the carry-in roller pairs 11 and 12, and is positioned by a solid line position shown in FIG. And the position alternately switched between the two-dot chain line position. That is, the flapper 14 is configured to selectively switch a plurality of transport paths downstream of the transport roller 11. Specifically, when the flapper 14 is switched to the solid line position shown in FIG. 1, the sheet material S is guided to the switchback section a in order to reverse the sheet material S. Further, when the flapper 14 is switched to the position indicated by the two-dot chain line shown in FIG. 1, the sheet material S is guided to the face-up discharge port 20 with the image face up without being reversed. Therefore, by selectively switching the flapper 14, it is possible to select whether to discharge and stack the sheet material S with the image side up or to discharge and stack the sheet material S with the image side down (image forming order). can do.
[0015]
The face-up discharge port 20 is provided with discharge roller pairs 21 and 22 for discharging the fed sheet material S onto a face-up tray 23 outside the apparatus. The face-up tray 23 is detachably attached to the apparatus 10, and sequentially stacks and holds the sheet materials S discharged by the discharge roller pairs 21 and 22.
[0016]
Reference numeral 16 denotes a reverse feed roller, which always rotates in the direction opposite to the feed roller 11 (in the direction of the arrow in the figure) in order to carry out the sheet material S carried into the switchback section a. The reverse feed roller 16 is located below an extension of the nip tangent line of the carry-in roller pair 11 and 12 and at a position where the leading end of the sheet material S carried in from the carry-in roller pair 11 and 12 reaches. , 12 side. Therefore, the sheet material S guided by the flapper 14 switched to the solid line position shown in FIG. 1 is carried into the switchback unit a without contacting the reverse feed roller 16.
[0017]
A roller 15 as a rotating member is rotatably attached to a position of the flapper 14 facing the reverse feed roller 16. Therefore, when the flapper 14 is switched to the two-dot chain line position shown in FIG. 1, the roller 15 rotates in contact with the reverse feed roller 16 and rotates when the flapper 15 is switched to the solid line position shown in FIG. 1. It is spaced apart from the feed roller 16 .
[0018]
That is, the sheet material S carried into the switchback unit a by the flapper 14 switched to the solid line position shown in FIG. Exhausted to 25. At this time, the sheet material S is temporarily exposed outside the apparatus, but the temporary discharge port 24 is disposed between the face-up discharge port 20 and a face-down discharge port 26 described later. For this reason, the sheet material S that is temporarily exposed to the outside of the apparatus from the temporary discharge port 24 is protected by the trays 23 and 27 attached near the respective discharge ports 20 and 26, and is not easily touched by the user. Therefore, the sheet material S is not sent obliquely or is not damaged, and the reverse conveyance can be performed smoothly. Furthermore, since the temporary exposure of the sheet material S can be hidden by the trays 23 and 27 of the respective outlets 20 and 26, the aesthetic appearance during operation is also favorable.
[0019]
On the upstream side of the carry-in roller pairs 11 and 12, sensors 17 and 18 are disposed as detecting means for detecting the rear end of the sheet material S. When the sensors 17 and 18 detect that the rear end of the sheet material S has passed during face-down discharge, the flapper 14 is moved by a solid line shown in FIG. The position is switched from the position to the two-dot chain line position. Therefore, the tip of the flapper 14 is smoothly transferred from the nip of the pair of input rollers 11 and 12 to the nip of the pair of output rollers 11 and 13.
[0020]
Then, the sheet material S is pushed toward the reverse feed roller 16 by the switching (lowering) operation of the flapper 14. That is, when the flapper 14 is switched to the two-dot chain line position shown in FIG. 1, the roller 15 provided on the flapper 14 is pressed against the reverse feed roller 16 and the sheet material S is brought into contact with the reverse feed roller 16 and the roller 15. The sheet is nipped and is discharged toward the pair of discharge rollers 11 and 13 in the direction opposite to the direction of the transfer.
[0021]
The sheet material S carried out by the carry-out roller pairs 11 and 13 is guided to any one of a plurality of face-down discharge ports 26 on the downstream side, and the image surface is moved downward from the discharge ports 26 onto the face-down tray 27. It is discharged and loaded in a state where For example, as shown in FIG. 1, the flapper 28 is switched from the solid line position to the broken line position shown in FIG. The sheet is discharged onto the face-down tray 27 by the discharge roller pairs 29 and 30 and stacked. That is, the sheet material S is discharged and stacked with the image surface facing down (image forming order).
[0022]
In FIG. 1, reference numerals 31 and 32 denote intermediate roller pairs, which are used to discharge the sheet material S to the face down tray below the uppermost face down tray 27 shown in FIG. It is a pair of rollers for conveying.
[0023]
In FIG. 1, reference numeral 19 denotes a guide member for guiding the sheet material S discharged from the discharge port 9 of the image forming apparatus 1 to the nip of the pair of carry-in rollers 11, 12. The guide member 19 is configured to be swingable about the rotation center axis of the transport roller 11 in accordance with a sheet material discharge position (a discharge port or a nip of a discharge roller pair) of the image forming apparatus. That is, as shown in FIG. 2, the sheet material S is transferred to an image forming apparatus in which the transfer position of the sheet material S is different from R, for example, an image forming apparatus in which the transfer position is L or an image forming apparatus in which the transfer position is H. When the transfer device 10 is mounted, the posture (upstream end) of the guide member 19 is changed according to the transfer positions R, L, and H, as shown by a two-dot chain line in FIG. It can be easily changed while maintaining the guide position. Accordingly, it is possible to cope with various image forming apparatuses having different discharge positions of the sheet material S.
[0024]
As described above, the sheet feeding force of the reverse feed roller 16 is adjusted in accordance with the feed path switching operation by the flapper 14 as the switching means, thereby reducing the feed force of the reverse feed roller 16 (weak force). , Or can be eliminated (completely separated), so that the next sheet material can be carried in even if the reverse feed roller 16 is rotating.
[0025]
More specifically, as described above, when the flapper 14 having the roller 15 as a rotating member at a position facing the reverse feed roller 16 is switched to the conveyance path to the face-up discharge port 20, the roller 15 The roller 15 is separated from the reverse roller 16 when the roller 15 is separated from the reverse roller 16 when the roller 15 contacts the feed roller 16 and is switched to the transport path to the face-down discharge port 26. Therefore, the next sheet material can be carried in even if the reverse feed roller 16 is rotating in the opposite direction to the conveying roller 11. That is, when there is a succeeding sheet material, if the flapper 14 is switched to a solid line position after the sensor 35 detects the leading end of the switched back sheet material, the succeeding sheet material can be introduced. Therefore, it is possible to provide a sheet reversing and conveying device suitable for an image forming apparatus that performs an image forming process at a high speed. Further, since the transport roller 11 and the reverse feed roller 16 are always rotating in one direction, there is no need for a complicated drive mechanism and drive control for rotating the conventional rollers forward and reverse, and a low-cost sheet material reversal. A transport device can be provided.
[0026]
In the sheet reversing and conveying apparatus, when the peripheral speed of the conveying roller 11 is V1 and the peripheral speed of the reversing roller 16 is V2, the relationship between the peripheral speeds of the rollers 11 and 16 is V1 ≧ V2. It is set to become. As a result, even if excessive stress is applied to the sheet material S in the process of reversely transporting the sheet material S and the sheet material S is likely to be buckled, a force is applied to the flapper 14 in the pushing direction from the sheet material S. And the pressure contact between the reverse feed roller 16 and the roller 15 is released, so that the sheet feed force of the reverse feed roller 16 decreases or disappears, and the sheet material S is not damaged. Accordingly, the sheet material can be stably inverted and conveyed.
[0027]
First Embodiment
Next, the sheet reversing and conveying apparatus according to the first embodiment will be described with reference to FIG. FIG. 4 is a partially enlarged view showing a configuration of a main part of the sheet material reversing and conveying apparatus according to the present embodiment. Since the schematic configuration of the entire apparatus is substantially the same as that of the above-described reference example , members having the same functions are denoted by the same reference numerals, and detailed description is omitted here.
[0028]
In this embodiment, when the peripheral speed of the transport roller 11 is V1 and the peripheral speed of the reverse feed roller 16 is V2, the relationship between the peripheral speeds of the two rollers 11, 16 is V1 as in the above-described embodiment. The peripheral speed difference is set so as to satisfy ≧ V2, and the driving force is transmitted to the reverse feed roller 16 via the torque limiter 33 as shown in FIG.
[0029]
The sheet reversing and conveying device according to the present embodiment, when the sheet material detection sensors 17 and 18 disposed on the upstream side of the pair of carry-in rollers 11 and 12 detect the rear end of the sheet material S, based on the detection signal, The switching operation of the flapper 14 is started while the rear end of the material S is still held between the carry-in roller pairs 11 and 12. That is, when the sheet material S is conveyed backward, the sheet material S is nipped for a short time between the carry-in roller pair 11 and 12 and the reverse feed roller 16 rotating in the opposite direction to the roller pair 11 and 12. become.
[0030]
In the sheet material S in the above-described state, stress starts to be generated due to the contradictory conveying force. Then, the resistance to the bending of the sheet material S is transmitted to the reverse feed roller 16, and the torque limiter 33 in the middle of driving the reverse feed roller 14 idles due to the resistance force of the sheet material S. As a result, the driving force is transmitted to the reverse feed roller 14, and the reverse feed roller 14 does not rotate backward.
[0031]
Therefore, when a stress is applied to the sheet material S in the above-described state, the torque limiter 33 absorbs the stress, and the rotation of the reverse feed roller 14 stops or rotates in the same direction as the rotation direction of the carry-in roller 11, so that The sheet material S is hardly damaged, and more stable reversal conveyance of the sheet material becomes possible.
[0032]
[ Second embodiment]
The sheet reversing and conveying apparatus according to the second embodiment will be described with reference to FIG. FIG. 5 is a partially enlarged view showing a configuration of a main part of the sheet material reversing and conveying apparatus according to the present embodiment. Since the schematic configuration of the entire apparatus is substantially the same as that of the above-described reference example , members having the same functions are denoted by the same reference numerals, and detailed description is omitted here.
[0033]
In this embodiment, as shown in FIG. 5, the reverse feed roller is a large-diameter roller 34 also serving as the carry-out roller 13 (see FIG. 1), and the reverse feed roller 34 is pressed below the transport roller 11. A roller 15 provided on the flapper 14 is brought into contact with a reverse feed roller 34 which is in pressure contact with the transport roller 11 in accordance with the transport path switching operation of the flapper 14. It is configured to separate. As a result, there is no need to provide a reverse feed roller separately from the transport roller group, and the number of components is reduced, so that further cost reduction can be realized.
[0034]
[Other embodiments]
In the above-described embodiment, the reverse feed roller 16 performs only reverse rotation, but it is also possible to switch between normal rotation and reverse rotation. Further, the sheet material reversing and conveying apparatus having a plurality of face-down trays has been exemplified. However, the present invention is not limited to this, and the present invention is effective even if the apparatus has one face-up tray and one face-down tray. It is. Also, the present invention is effective for an apparatus having a processing unit such as a stapler for performing processing such as binding on a sheet bundle discharged onto a tray.
[0035]
Further, in the above-described embodiment, the sheet material reversing and conveying device used in the image forming apparatus in which the image surface is formed on the upper surface of the sheet material is illustrated. In the sheet reversing conveyance device used in the apparatus, a tray for discharging and stacking the sheet material without reversing is a face-down tray, and a tray for reversing the sheet material and discharging and stacking is a face-up tray. The present invention is also effective.
[0036]
Further, in the above-described embodiment, a copying apparatus combined with a reader or the like is exemplified as a form of the image forming apparatus. However, the present invention is not limited to this. For example, a facsimile apparatus having a transmission / reception function or an information processing apparatus such as a computer The present invention may be in the form of an image output terminal, and the same effects as described above can be obtained by applying the present invention to the sheet material reversing and conveying apparatus used in these apparatuses.
[0037]
In the above-described embodiment, an electrophotographic method is exemplified as a recording form by the image forming unit. However, the present invention is not limited to this. For example, recording by an inkjet method, a thermal transfer method, a heat-sensitive method, a wire dot method, or the like. Or any other recording method, and the same effects as described above can be obtained by applying the present invention to a sheet material reversing and conveying apparatus used in an image forming apparatus having these recording modes. Is obtained.
[0038]
【The invention's effect】
As described above, according to the present invention, the sheet conveying force of the reverse feed roller can be reduced or eliminated, and the next sheet can be carried in. Therefore, it is possible to provide a sheet reversing device suitable for an image forming apparatus that performs image forming processing at high speed.
[0039]
When the peripheral speed of the transport roller is V1 and the peripheral speed of the reverse roller is V2, the relationship between the peripheral speeds of the two rollers is V1 ≧ V2, and the transmission of the driving force to the reverse roller is torque. When a torque equal to or greater than a set value is applied to reversely feed the sheet material through the limiter, the reverse feed roller stops or rotates in the same direction as the transport roller. However, even if excessive stress is applied to the sheet material in the process of reversing and conveying the sheet material, and the sheet material is likely to be buckled, the conveying force for reversely feeding the sheet material is reduced or eliminated, thereby damaging the sheet material. The sheet material can be more stably inverted and conveyed.
[0040]
Also, the reverse feed roller is pressed against the transport roller to form a nip on the discharge side, and the rotating member provided in the switching means is brought into contact with the reverse feed roller pressed against the transport roller with the transport path switching operation of the switching means. With a configuration in which contact and separation are performed on the other hand, there is no need to provide a reverse feed roller separately from the transport roller group, and the number of components is reduced, so that further cost reduction can be realized.
[Brief description of the drawings]
FIG. 1 is a cross-sectional configuration diagram of a sheet material reversing and conveying apparatus according to a reference example .
FIG. 2 is an enlarged sectional view of a main part of a sheet material reversing and conveying apparatus according to a reference example .
FIG. 3 is a schematic configuration diagram of an image forming apparatus provided with the sheet material reversing and conveying device.
FIG. 4 is an enlarged sectional view of a main part of the sheet material reversing and conveying apparatus according to the first embodiment.
FIG. 5 is an enlarged sectional view of a main part of a sheet material reversing and conveying apparatus according to a second embodiment.
FIG. 6 is an explanatory diagram of a conventional technique.
[Explanation of symbols]
S: sheet materials R, L, H: sheet material delivery position 1: image forming apparatus 2: automatic document feeder 3, platen glass 4, photoconductor drum 5, developing device 6, transfer device 7, fixing device 8, discharge roller 9 vs. outlet
10… Sheet reversing conveyance device
11, 12, 13… Transport roller
14 ... Flapper
14a ... shaft
15 ... Coro
16, 34… Reverse feed roller
17, 18, 35… Sensor
19… Guide member
20… Face-up outlet
21, 22… Discharge roller pair
23… Face-up tray
24 ... temporary outlet
25 ... Reversing tray
26 ... Face-down outlet
27 ... Face down tray
28 ... Flapper
29, 30… Discharge roller pair
31, 32 ... Intermediate roller pair
33… Torque limiter

Claims (7)

A reverse feed roller that rotates in a direction opposite to the feed direction to reverse the sheet material being sent;
Switching means for guiding the sheet material to be fed and the sheet material to be fed back upstream of the reverse feeding roller;
Has,
It is configured to adjust a sheet material conveying force by the reverse feed roller according to a switching operation by the switching unit ,
When the peripheral speed of the transport roller upstream of the reverse feed roller is V1 and the peripheral speed of the reverse feed roller is V2, the relationship between the peripheral speeds of the two rollers is V1 ≧ V2, and The transmission of the driving force to the reverse feed roller is performed via a torque limiter, and when a torque greater than a set value is applied to reversely feed the sheet material, the reverse feed roller stops or the transfer roller and A sheet material reversing / conveying device characterized by rotating in the same direction . A reverse feed roller that rotates in a direction opposite to the feed direction to reverse the sheet material being sent;
Switching means for guiding the sheet material to be fed and the sheet material to be fed back upstream of the reverse feeding roller;
Has,
The reverse feed roller is in pressure contact with a transport roller rotating in the feed direction to form a nip on the discharge side, and a rotating member provided in the switching means is in pressure contact with the transport roller in accordance with a switching operation by the switching means. A sheet material reversing and conveying device configured to adjust the sheet material conveying force by the reverse feeding roller by performing contact and separation with respect to the reverse feeding roller . The switching means has the rotating member at a position facing the reverse feeding roller, and the rotating member comes into contact with the reverse feeding roller when the switching means switches to the feeding path on the reverse feeding side, and the rotating member contacts the feeding path on the feeding side. 3. The sheet reversing and conveying apparatus according to claim 1 , wherein the sheet is separated from the reverse feed roller when the sheet is switched. A face-up discharge port for discharging the sheet material to the outside of the apparatus with the image surface of the sheet material facing upward, and at least one face-down discharge port for discharging the sheet material to the outside of the apparatus with the image surface of the sheet material facing downward, The sheet material reversing and conveying device according to claim 3 . A temporary discharge port for temporarily discharging the sheet material outside the apparatus when the sheet material is turned over, is disposed between the face-up discharge port and the face-down discharge port. sheet reversing conveying device according to 4. A guide member for guiding a sheet material conveyed from the image forming apparatus to a nip on a carry-in side of a conveyance roller rotating in a feeding direction, wherein the guide member is configured to be a conveyance roller according to a sheet material discharge position of the image forming apparatus; 3. The sheet material reversing and conveying device according to claim 1, wherein the sheet material can be swung about a rotation center axis of the sheet material. In an image forming apparatus having an image forming unit that records and forms an image on at least a sheet material,
An image forming apparatus comprising the sheet material reversing and conveying device according to any one of claims 6 to 6 .

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