JPS62101946A - Driving device - Google Patents

Abstract

PURPOSE:To make the continuous feeding of manuscripts possible by keeping the carrying or the delivering roller of a reversing device rotating in a carrying direction even during the reversing operation of the inside and outside of the manuscript. CONSTITUTION:Gears GI, GI' united with a shaft (d) receiving reversible driving force from a motor M and gears GII, GII' meshing with the gears GI, GI' are provided in a driving device. A pulley with an one-way clutch locking only when the gears GI, GI', GII, GII' revolve clockwise or gears (a), (b), (a'), (b') are also provided. In addition, unidirectional turning force is transmitted to shafts (c), (d') through a timing belt BO engaging the gears (a), (b), (a'), (b') or a gear GO. The above-mentioned constitution therefore makes the continuous feeding of manuscripts possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in an automatic document feeder and drive device used in addition to a recording device such as an electrophotographic copying machine.

[Prior Art] An automated document feeder CADFI has already been provided as a device that can efficiently supply documents to be copied to a recording device even in an unattended state. Functionality was limited to one-sided copying.

On the other hand, with the recent development of recording devices that can make continuous copies on both sides of recording paper, the need for ADFs that can copy double-sided originals is increasing, and many devices are used as mechanisms for reversing originals in ADFs. An idea has been made.

Regarding them, please refer to Japanese Patent Application Laid-Open No. 59-216159,
Japanese Unexamined Patent Publication No. 53-112738, Utility Model Application No. 59-454
No. 8, JP-A No. 6O-aa34, JP-A No. 60-
There are proposals such as Publication No. 26559.

[Problems to be Solved by the Invention] These automatic document feeders have a document supply section that supplies documents stacked on a document feeder to a single-sheet recording device, a document conveyance section that stops the document conveyance at an exposure position, and a document feeder that It consists of a document reversing section that reverses the original after exposure on the first side and transports it back into the recording device, and a document ejecting section that ejects the document after exposing the second side onto the document ejection tray. Due to the mechanism of the device, the conveyance rollers disposed in each part are often configured to be driven entirely by two types of drive motors: a motor that rotates in forward and reverse directions and a motor that rotates in one direction.

In other words, as is well known, this drive motor is used by switching between forward and reverse rotations because it is necessary to reversely transport the original whose first side has been exposed in the original transport unit to the reversing unit, and the original drive motor which only requires rotation in one direction. Two types are required: one that supplies power to each conveyance roller in the document reversing section, document reversing section, and document discharging section.

Furthermore, motors are expensive and must be synchronized, so if one type of motor is used to drive the entire system, for example, it is necessary to obtain driving force to rotate in one direction from a motor that rotates forward and reverse. As shown in the conventional example shown in Figure 8,
Minimum of 5 gears ()01. GO2,...GO5 and 2
A drive device consisting of electromagnetic clutches CLI and (1!L2) is provided, and the electromagnetic clutches are operated according to the forward/reverse timing of the drive/motor M to control the rotation of the drive output so that it always rotates in one direction. There is a need for a function that allows

It is also possible to obtain forward and reverse rotation output using a drive motor that rotates in one direction instead of the drive motor that can rotate forward and backward as described above, but since a drive device of the scale and function described above is required, it is not possible to use either method. However, the actual situation is that the cost of the equipment is also a big burden.

As a result of solving and improving this point, the present invention provides a simple and inexpensive drive device that does not require multiple motors, expensive electromagnetic clutches, and control functions, and an automated system using the drive device. The purpose is to provide a document transport device.

[Means for Solving the Problems] The above objective is to provide a drive source that rotates in forward and reverse directions, a plurality of one-way clutches that rotate in conjunction with the drive source, and at least one one-way clutch that rotates in conjunction with the plurality of one-way clutches. This is achieved by a drive device characterized in that it has a drive transmission means, and the one drive transmission means can extract rotational driving force in only one direction.

[Example code] An embodiment of the invention is shown in FIGS. 1 and 2.

FIGS. 1(-) and 1(b) show an example of a drive device for obtaining driving force for forward and reverse rotation as well as driving force for unidirectional rotation from a motor that rotates in forward and reverse directions.

Gears ■, r, and gear 1.I'' that are integrated with Md, to which forward and reverse driving force is transmitted from motor M to Md, d''
There are gears (1) and (W) that mesh with the two gears, and there are pulleys or gears (a, b, a', b') with one-way latches that lock only when the gears rotate clockwise. The gear a,
A unidirectional rotational force is transmitted to the shaft C201 via the timing bell (BO) or the gear GO that engages the shafts C201 and B201.

FIG. 2 shows an example of an automatic document feeder to which the drive device is applied, and the figure shows the recording apparatus main body 10 viewed from the front along the two-dot chain line. On the top surface of the device main body 10,
An automatic document feeder (hereinafter referred to as AT) 20 equipped with a drive device of the present invention whose outline is shown at point f [I] is placed in a structure that can be opened to the rear side by supporting with a hinge or the like. However, in the case shown in the figure, the ADF 20 is tilted toward the front and the document conveyance bell (30) is in pressure contact with the platen glass 11 provided at the top of the main body 10 of the apparatus.

That is, the ADIP 20 enables automatic document feeding using the transport mechanism described below, but ADIP 20 can also be manually fed. By opening and closing the entire platen cover 20, it also functions as a normal platen cover.

There is a document feeder 40 in the document supply section located at the top of the ADF 20, which stacks the documents.When the copy button is pressed, each transport mechanism is activated by the motor M in the ADF 20. 21 presses against the top surface of the leading edge of the document tray by its own weight, and then begins to rotate in the direction of the arrow, moving the document tray with the top first surface as the top surface onto the guide plate 2.
Send it out along 4a.

Next, the manuscript is processed by the processing bell) 22a and the processing roller 22.
Only the top one is the guide plate 24 after being squeezed by b.
1), and when its tip reaches the supply roller 23&, which rotates in the direction of the arrow, the clutch C is actuated by a detection signal from a sensor (not shown) to cut off the power transmission to the feed roller 21, and its rotation is free. state.

The original @D conveyed by the supply roller 23a is conveyed inside the U-shaped guide section 5a, so that it is turned upside down and passes through the shielding member provided at the exit of the guide section 25a. 27 at the tip of the document tray and rotates clockwise) [The belt reaches the conveyor belt 30 stretched between the moving roller 28a and the driven p-roller 28b (7), and the conveyance continues due to its frictional force. be done.

When the original document is conveyed by the conveyor belt 30 while sliding to the left on the platen glass 11, its left end comes into contact with the document stopper member 12 provided on the left edge of the platen glass 11 and stops. The belt drive roller 28a slips on the document sheet and spins idly, but immediately after that, the rotation of the belt drive roller 28a is temporarily stopped in response to a signal outputted from the control section after a predetermined time delay by the sensor described above.

Note that the document stopper member does not necessarily need to be installed on the recording apparatus main body side, and may be installed on the AD1+' side.

In addition, the conveyor belt 30 can be moved without using the document stopper member.
The document may be positioned by controlling the document to stop at a predetermined position.

In this state, the document is pressed against the platen glass 11 by the conveyor belt 30, which is under the weight of a plurality of driven rotating pressure rollers 29, and the exposure of the first side is started, after which the image is transferred through a well-known process. One-sided copying is completed by forming and transferring to recording paper.

Furthermore, the ADF'20 is provided with an original reversing section 25b for reversing the original document by a reversing path formed by a pair of thin metal plates, resin plates, etc. on the right side of the platen glass 11, one end of which is Guide part 2
5a and the other end is connected to the right edge of the platen glass 11.

Conveying roller groups 23b, 230, 23 (L) that rotate in the direction of the arrow are arranged at key points of the reversing section 25b, and the document reversing section is located near the opening facing the platen glass 11 or near the guide section 25a. The common path of the portion 25b includes the reversing portion 2.
For example, a sensor 26 consisting of a photo sensor consisting of a light emitting section 26a and a light receiving section 26b or a microswitch is arranged to detect a document passing through the inside of the sensor 5b.

On the other hand, the original document whose first side has been exposed by the above-described process is transported rightward on the platen glass 11 by the conveyor belt 30 as the belt drive roller 28a starts rotating counterclockwise in synchronization with the end of exposure. be done.

The right end of the conveyed original document is blocked by the shielding member 27, so that it does not enter the guide section 25a but is sent to the reversing section 25b.

Therefore, the document tray rotates counterclockwise in the reversing section 25b in the order of the conveyance rollers 23d, 23c, and 23b, and then the right end of the document tray, that is, the tip in this case, moves to the guide section 25a.
The document reaches the point where the shielding member 27 is removed and sent onto the platen glass 11 again, but the leading or trailing end of the document is previously rotated clockwise by the belt driving roller 28a based on the signal from the sensor 26. It is now possible to switch to .

In other words, even if the belt drive roller 28a changes its rotation direction from counterclockwise to clockwise again, the drive device of the present invention will not cause the conveyance rollers 23b, 23c, 23(L
The direction of rotation is not reversed, but continues to rotate in the direction of the arrow, that is, to turn the document tray counterclockwise.

In FIG. 2 and FIG. 3 showing the main part of the plane, a belt drive roller 28a is connected to a drive motor M and rotates forward and backward.
The rotating shaft S1 has a gear GO fixed to the rotating shaft S1, a gear Gl that meshes with the gear Go, a gear G2 that is the same size as the gear G1 and meshes with each other, and the gears Gl and G2 are Inside is the gear Gl.

There is a one-way rotational clutch that locks with the shaft only when G2 rotates counterclockwise, and one-way rotational force is transmitted to the pulleys PGI, PG2 through the clutch, and the one-way rotational force is transmitted to the pulleys PGIL, PG2 . P23b.

Conveyance rollers 23b, 23c, and 23d are driven via belts that engage P23c and P23d.

Therefore, when the belt drive roller 28a is rotating counterclockwise to send the document to the reversing section 25b by the conveyor belt 30, the one-way clutch in the gear G2 is activated, but the gear G1 is rotating clockwise. Gear Gl to
The one-way clutch inside does not work, resulting in Boo IJ P
Gl is in an idle state, and the conveyance rollers 23b, 230
, 23(l) are rotated counterclockwise by belt drive by the pulley PG2.

Next, as described above, when the belt drive roller 28a is rotated clockwise by the reverse rotation of the drive motor, the gear G2
Instead of the inner one-way clutch being in an idle state, the gear G
The one-way clutch in 1 is activated and Boo IJ P G 1
Conveying rollers 23b and 23c are used to move the
, 23d are also rotated counterclockwise in this case.

In this way, the document is conveyed in the counterclockwise direction through the reversing section while the conveyance rollers 23b, 23c, and 23d are always kept rotating in the counterclockwise direction.

Therefore, the document sent onto the platen glass 11 is turned upside down by passing through the reversing section 25b, and the back surface, that is, the second surface, faces the platen glass 11 until it comes into contact with the document stopper member 12 by the conveyor belt 30. transported.

Then, the rotation of the belt driving roller 28a is stopped again by a signal issued after a predetermined time delay from the detection by the sensor 26.

Meanwhile, in the main body 10 of the apparatus, the recording paper that has undergone single-sided copying has been fixed, is turned over, and is in a position where the back side can be transferred.
Following the stop of step 8a, exposure, image formation, and transfer of the back side of the original document, that is, the second side, are performed within the apparatus main body 10.

When the exposure of the back side of the original plate is completed, the original stopper member 12 is retracted by the action of a solenoid, etc., and then the above-mentioned bell)
The moving roller 28a starts rotating clockwise again, and the conveyor belt 30 transports the document to the left and sends the document to the document discharge tray 50 provided in the document discharge section of the ADIF 20. As copying is repeated, the document is sequentially conveyed. Let's layer it.

A discharge roller 31 is provided immediately before the document discharge tray 50 and is rotated by a drive motor via the driven roller 28b.
3b, 23a, and 23d, the drive device of the present invention always rotates clockwise and discharges the document tray to the document discharge tray 50, regardless of the reversal of the conveyance direction of the document tray.

That is, the one-way clutch described above is connected to the driven roller 28.
A one-way clutch is attached to the rotating shaft Sll of b, and another one-way clutch is attached to the intermediate shaft 312, and only when these shafts rotate clockwise, the clutch acts and the pulley Dll
Alternatively, the pulley 12 drives and rotates the discharge roller 31 clockwise via the belt Bll.

Therefore, from the belt drive roller 28a to the conveyor belt 30
Regardless of whether the rotation direction of the driven roller 28b driven by the driven roller 28b is clockwise or counterclockwise, the ejection roller 31 always rotates clockwise due to the action of the driving device of the present invention as described above. The operation of sending out the exposed original p to the original discharge tray 50 continues. This prevents the document from getting caught in the discharge stream from the paper discharge.

Note that after the rear end of the document tray passes the document stopper member 12, the document stopper member 12 returns to the illustrated position, and the clockwise rotation of the transport roller 28a is stopped.
The structure is such that control is performed so that the conveyance of the original MD is automatically started after 20 operation cycles to restore the original state.

Alternatively, the conveyance of the next original may be started while the original is being ejected, and after the rear end of the original passes through the stopper, the strapper returns to stop the next original at a predetermined position.

Furthermore, the original may be reversed again before being ejected. Further, the present drive mechanism can also be applied to conventionally known copying and recording devices such as electrophotographic and conventional copying devices, laser printers, liquid crystal printers, and LED printers. Here, timer control by the sensor and the control unit for transporting and exposing the original will be explained.

In the first embodiment shown in FIG. 2, there is a document feed tray 40 on the top of the ADIP 20 for stacking documents, and when the copy button is pressed, the control means inside the copying machine Each transport mechanism is operated by the motor in the ADF 20. First, the feed roller 521 presses the top surface of the leading edge of the document tray by its own weight, and then starts rotating in the direction of the arrow to transfer the document tray with the top first surface as the top surface. It is sent out along the guide plate 24a.

For ugly manuscripts, use the handling bell) 22a and the handling roller 2.
2b, only the top one is the guide plate 2.
4b, the tip of which reaches the paper feed roller 23a rotating in the direction of the arrow, the detection signal from the sensor A cuts off the power transmission to the feed roller 21, making it free to rotate.

The document conveyed by the paper feed roller 23a is conveyed inside the U-shaped guide section 5a, so that it is turned upside down and passes through the shielding member provided at the exit of the guide section 25a. 27 is removed at the leading edge of the document tray, and reaches the conveyor belt 30, which is stretched between a belt driving roller 28a and a driven roller 28b, which rotate clockwise, and conveyance is continued by the frictional force thereof.

When the document is conveyed by the conveyor belt 30 while sliding to the left on the platen glass 11, its left end comes into contact with the document stopper member 12 provided on the left edge of the platen glass 11 and stops. Immediately after this, the rotation of the belt drive roller 28a is temporarily stopped by a signal sent from the control section after a predetermined time delay by the sensor A described above. In other words, the moving roller 28a stops a predetermined time later than the time required from when the document is detected by the sensor A until it reaches the document stopper member.

Note that the document stopper member does not necessarily need to be installed on the recording apparatus main body side, and may be installed on the ADF side.

In this state, the document is pressed onto the platen glass 11 by the conveyor belt 30 which receives its own weight from a plurality of driven and rotating pressure rollers 29, and at the same time as it stops, exposure of the first side is started, and then a well-known process is carried out. After that, the image is formed and transferred to the recording paper, and one-sided copying is completed.

Furthermore, in the ADF 20, the platen glass 11
A document reversing section 25b is provided on the right side of the document reversing section 25b for reversing the document front and back through a reversing path formed by a pair of thin metal plates, resin plates, etc., and one end thereof is opened and connected to the guide section 25a described above. The other end is configured to open at the right edge of the platen glass 11.

Conveying roller groups 23b, 23c, and 23d rotating in the direction of the arrow are arranged at key points of the reversing section 25b, and near the opening facing the platen glass 11, the reversing section 2
A photosensor 26 consisting of a light emitting section 26a and a light receiving section 26b is arranged to detect a document passing through the inside of the photo sensor 5b.

On the other hand, the original document whose first side has been exposed by the above-described process is transported rightward on the platen glass 11 by the conveyor belt 30 as the belt drive roller 28a starts rotating counterclockwise in synchronization with the end of exposure. be done.

The right end of the conveyed original document is blocked by the shielding member 27, so it does not enter the guide section 25a and is therefore sent to the reversing section 251).

Therefore, the document tray rotates counterclockwise in the reversing section 25b in the order of the conveyance rollers 23d, 23c, and 23b, and then the right end of the document tray, that is, the tip in this case, moves to the guide section 25a.
When the original document reaches the state of the original document, the shielding member 27 is removed and the document is sent onto the platen glass 11. However, before the leading end of the original document reaches the conveyor belt 30, the rear end of the original document is exposed to the light beam of the photosensor 26. Based on the signal, the rotation of the bell E moving roller 28a is switched clockwise again, and the conveyor belt 30 is rotated clockwise, so that the document with the second side facing downward is moved again to the document stopper member 12. It is designed to be conveyed until it comes into contact with.

On the other hand, a first timer is provided which starts its operation in response to a signal from the photosensor 26 that detects the leading edge of the document holder, and the conveyor belt stops after the document holder reaches the document stopper member 12 due to the action of the timer. The document tray is then held still.

Meanwhile, in the main body 10 of the apparatus, the recording paper that has undergone single-sided copying has been fixed, is turned over, and is in a position where the back side can be transferred.
Following the stop of step 8a, in the main body 10 of the apparatus, exposure, image formation, and transfer are performed on the back side of the original document, that is, on the second side.

Next, when the exposure of the second side of the document tray is completed, the document stopper member 12 is activated by the operation of the second timer which, like the first timer described above, starts its operation in response to a signal that detects the leading edge of the document from the photosensor 26. At the same time as it is retracted downward, the conveyance bell 30 starts rotating clockwise again, conveying the document to the left and feeding it to the document discharge tray 50 provided outside the ADF 20. As copying is repeated, the document is transferred. Layer them one after another.

Note that after the rear end of the original document passes through the original stopper member 12, the original stopper member 12 returns to the illustrated position, and the clockwise rotation of the moving roller 28a is stopped and the operation cycle of the ADF'20 is completed. The structure is such that the document is returned to its original state and the subsequent conveyance of the document is automatically started.

The operation of the conveyance function of the document folder in the first embodiment described above is illustrated in a time chart as shown in FIG.
6 controls all the switching and stopping of the conveying direction of the document tray, thereby making it possible to automatically and continuously copy both sides of the document.

Further, in the second embodiment shown in FIG.
A photosensor 126 is disposed in place of the sensor 26 in the first embodiment in the conveying path where the reversing section a and the reversing section 25b meet, and in this case, the photosensor 126
Reference numeral 6 indicates that the document is conveyed through the guide section 25a for exposure of the first side, and again after the exposure of the first side is conveyed through the reversing section 25b in order to receive the second exposure. As a result, as is clear from the time chart in FIG.
Furthermore, the above-mentioned stop control of the supply roller 21 is also possible.

Therefore, in the second embodiment, the sensor A in the first embodiment is
It becomes possible to control signals in the automatic document feeder even without providing the automatic document feeder.

In any of the above-mentioned embodiments, the document is turned over again by the reversing section and passed through the exposure section as it is.
It is possible to eject the paper and align it to the same page as when it was fed into the ADF. It is also possible to start transporting the next original while discharging the original, and after the trailing edge of the original passes the stopper, the stopper returns to stop the next original at a specified position.

Further, the sensor used is not limited to a photo sensor, but a micro switch and other sensors can also be used.

Next, the arrangement of the driving motor M (which is the drive source) will be explained. The third document transport mechanism in the ADF20 is
The device shown in the figure [20] has a second
Each transport member shown in the figure is arranged on the back side of the substrate A, and each drive member (indicated by a two-dot chain line in Fig. 2) for rotating each transport member is arranged. It is configured to be driven and rotated by the power of a motor M.

The driving motor M is generally large in size and equipped with a reduction gear device due to its large load, and therefore requires a large space within the device to house it. In the automatic document feeder, by configuring the above-mentioned reversing roller group using edict rollers with small outer diameter dimensions, it is possible to form a large space inside the document reversing section 25b, and this space can be used effectively. One way to do this is to accommodate the drive motor M.

Therefore, the shaft of the driving motor M is configured to pass through the substrate A and transmit power to each driving member installed on the back surface of the substrate.

That is, the rotation of the driving motor M is transmitted at a reduced speed from the pulley PI to the pulley P2 via the timing belt, and at the same time as the conveying roller 28at is driven, the rotation is further transmitted from the pulley 2 to the pulleys 3 and 4 via the timing belt. communicated.

The pulley 3 drives the paper feed roller 23a, which is coaxially integrated, and further drives the reversing rollers 23b, 23c, and 23d via a gear G1 or G2. What are the gears G1 and G2? t are also installed on the same axis.

The gear G1 and the pulley PGI or the gear G are engaged with each other only in the case of mutually opposite rotational directions between the gear G1 and the pulley PGI or the gear G
A one-way clutch is provided in which either one of the feed roller 23a and the feed roller 23a is coaxially integrated.
Regardless of the direction of rotation of the conveying roller 23b,
, 23c, and 23d are all rotated only in the counterclockwise direction.

Further, rotation is transmitted from the pulley P4 to the feed roller 21 and the sorting belt 22a via a clutch, so that they are driven together with the conveyance roller 28&.

Each of the drive members except for the drive motor M is a small member, and the depth dimension occupying the back surface of the board A is small, and as a result, the device 2° is small and easy to handle. It is said that

Note that the space formed inside the reversing portion 25b can accommodate members other than the aforementioned drive motor M, and is extremely useful for making the device zO more compact.

In the automatic document feeder described above, a conveyance failure may occur during conveyance of the document. Therefore, the inverted part 2 of the original
5b requires measures to be taken out in the event of a jam.

FIGS. 7(a) and 7(b) show the main parts thereof.

The document reversing section 25b is a conveyance path formed by an inner guide member 225a and outer guide members 225b and 225c formed from a thin metal plate or a fat pad, etc., and through which paper can pass through, and has a slit-shaped cross section. One end is connected to the guide section 25a described above, and the other end is connected to the right photographing section of the platen glass 11.

The inner guide member 225a and the outer guide member 225C
is fixedly attached to the ADF 20, but the outer guide member 225b is rotatably attached via a rotation support portion 226 provided on the AD1+'20. That is, when the ADF 20 is in operation, the outer guide member 225b is in the state shown in FIG. However, when the operation is stopped, the lock is released and the rotation support section 226 is used as a fulcrum to rotate clockwise, as shown in FIG. 7(b).
As shown in FIG. 2, the upper part of the document reversing section 25b is opened, and the upper surface of the inner guide member 225a is exposed.

Further, the document reversing section 25b includes a conveyance roller 23b which is rotated counterclockwise by a motor in the ADIF 20 to convey the document within the conveyance path, but is prevented from being reversed.
Pressing rollers 223b, 223c, 2 are placed in pressure contact with the rollers 23c and 23d, and rotate as a result of the pressure contact.
23d, among which a pressure roller 223b
, 223C are pivotally attached to the outer guide member 225b,
It is to be retained.

Therefore, if a feeding failure occurs due to a paper jam or the like in the document reversing section 25b, the motor of the ADF 20 is stopped and the outer guide member 225b is opened, as shown in FIG. 7(b). At the same time that the conveying direction of the document sheet is wide open, the clamping surfaces of the conveyance rollers 23b, 23c, etc. are also opened, and the jammed document sheet is easily and quickly pulled out, and the conveyance of the following document sheet is immediately resumed. It is now possible to do this.

[Effects of the Invention] The drive device according to the present invention has a simple structure and is less likely to fail. Therefore, an automatic document feeder to which the drive device according to the present invention is applied has a simple and inexpensive mechanism that maintains the rotation of the reversing section conveyance roller and ejection roller in the conveyance direction even during the operation of reversing the front and back of the document. This makes it possible to continuously supply documents, thereby increasing the copying speed of the recording device.

At the same time, accidents such as jams caused by reverse rotation of the rollers during conveyance, or reverse or feeding of ejected documents can be prevented, and the automatic document feeder can stably convey documents without damaging them. A driving device will be provided.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a drive device of the present invention. FIG. 2 is a sectional view of an automatic document feeder which is an example of its application. FIG. 3 is a plan view of the second embodiment. FIG. 4 is a sectional view of an automatic document feeder showing another embodiment. FIG. 5 and FIG. 6 are time charts showing the sequence. FIG. 7 shows the main parts of the automatic document feeder. FIG. 8 is a perspective view showing a conventional example. DESCRIPTION OF SYMBOLS 10...Recording apparatus main body 11...Platen glass 12...Document stopper member 20...Automatic document feeder (ADF, 123a...
Supply rollers 23b to 23d...conveyance roller 2
5b...(Original) Reversing section 28a...Belt drive roller 28b...Followed roller 30...1 feeding belt 31...Ejection roller 40...Original feed tray 50...Original ejection Plate D... Manuscript applicant Konishiroku Photo Industry Co., Ltd. Figure 7

Claims (4)

[Claims] (1) It has a drive source that rotates in forward and reverse directions, a plurality of one-way clutches that rotate in conjunction with the drive source, and at least one drive transmission means that cooperates with the plurality of one-way clutches,
A drive device characterized in that the one drive transmission means is capable of extracting rotational driving force in only one direction. (2) The drive device according to claim 1, which is a copying machine having the drive device. (3) The drive device according to claim 1, which is an automatic document feeder having the drive device. (4) The drive device according to claim 1, characterized in that the drive device is used to rotate the document conveyance means in forward and reverse directions and to rotate the conveyance section of the document discharge means only in one direction. .