JPH11334929A - Document feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a document feeder, which has a simple mechanism so that only its feeding part can be driven with its separating part stopped, and which features an easy stopping operation and low cost. SOLUTION: This document feeder is provided with a driving motor 15, a separating roller 24, and feeding rollers 25, 27. A first transmission route of driving force of the driving motore 15 comprises a transmission gear 32, a one-way gear 33, an idler gear 35, a belt 37, a one-way pulley 39, an idler gear 44, and a belt 46, while a second transmission route of the driving force of the driving motor 15 comprises the transmission gear 32, a one-way gear 34, a belt 38, a one-way pulley 40, and a belt 46. Spring clutches to transmit torque in the allow A direction are provided in the one-way gear 33 and the one-way pulley 39, while spring clutches to transmit torque in the allow B direction are provided in the one-way gear 34 and the one-way pulley 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document feeder, and more particularly, to a document feeder which is mounted on a document reading device and continuously feeds a document stacked on a document table to a reading position.

[0002]

2. Description of the Related Art Conventionally, there has been known a document feeder which separates stacked documents one by one and continuously feeds them to a processing position by an apparatus main body. For example, a document feeder is known for a scanner device, a facsimile device, and a copying machine. A document to be loaded and conveyed is transported to a reading position.

[0003] As this type of document conveying device, for example,
It is described in JP-A-6-336350. The document feeder described in this publication is provided with a transport roller such that the separation speed of the document becomes slower than the reading speed of the document in order to provide convenient functions required for office equipment in recent years and reduce costs. It has been proposed to adopt a peripheral speed difference method in which a gap is formed between documents by making a difference between the peripheral speeds of the roller and the separation roller so that the pages can be distinguished. According to this peripheral speed difference method, the interval between the documents between the pages is determined by the peripheral speed difference setting, so that the motor for rotating the transport roller and the separation roller can be easily controlled by keeping the motor driven, and the driving force is reduced. The number of components of the transmitting mechanism can be reduced, and the cost can be reduced.

[0004]

However, in such a conventional document feeder, if, for example, a stop command is input during the reading of the document, the document remains in the middle of the transport path. The work of pulling out the document also caused a failure. SUMMARY OF THE INVENTION It is an object of the present invention to provide an inexpensive document feeder in which only a transfer unit can be driven by a simple mechanism, and which can be easily stopped and is inexpensive.

[0005]

In order to achieve the above object, the invention according to the first aspect of the present invention provides a separation unit for separating stacked originals one by one and feeding the separated originals, and a separation unit for separating and feeding originals. A transport unit for transporting to and from the processing position by the apparatus main body, and using the drive source in common for the transport unit and the separation unit, so that the separation and feeding speed by the separation unit is higher than the transport speed by the transport unit. A first transmission path for transmitting a driving force of a driving source to a conveyance unit and a separation unit, wherein the first conveyance path transmits a driving force of a driving source to a conveyance unit and a separation unit; A second transmission path for transmitting the driving force of the driving source only to the conveyance section, and a driving force is transmitted via the first transmission path in accordance with a driving command for document conveyance to simultaneously drive both the separation section and the conveyance section to load the stacked documents. Conveys continuously to the processing position of the main unit Switching means for switching to execute either a transport mode or a stop mode in which a driving force is transmitted via the second transmission path according to a document transport stop command to drive only the transport unit and unload the transport document. It is characterized by having been provided.

According to the first aspect of the present invention, the transport mode is executed by a drive command for document transport, and the driving force of the drive source driven in accordance with the drive command is transmitted to the separation unit and the transport unit via the first transmission path. Communicated to both. Therefore,
The stacked originals are continuously separated and
While being fed, the document is conveyed to a processing position of the apparatus main body by the conveyance unit while discriminating between pages by a gap formed between the documents, and is carried out of the apparatus after the processing of the apparatus main body is completed. If a stop command is issued during the document conveyance, the switching unit switches the stop mode, and the driving force of the driving source driven according to the stop command is transmitted to only the conveyance unit via the second transmission path. Therefore, at this time, the original in the transport path is transported by the transport unit without the loaded original being newly separated and fed while the separating unit is stopped.
It is carried out.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the switching means transmits a driving force from a driving source through a first transmission path to a transport unit to transmit the driving force to a second transmission unit. The driving force from the driving source via the path is not transmitted to the transport section, the driving force from the driving source via the second transmission path is transmitted to the transport section, and the driving force from the driving source via the first transmission path is transmitted to the transport section. Clutch means that does not transmit to the
A transmission unit that transmits the driving force transmitted to the transport unit to the separation unit in the transmission path, and the first or the second driving unit transmits the driving force to the transport unit in the same direction regardless of whether the transport mode or the stop mode is executed. Adjusting means for transmitting the driving force in the second transmission path.

According to the second aspect of the present invention, when the transport unit is driven by the driving force of the driving source via one of the first transmission path and the second transmission path, the first means is driven by the clutch means.
The driving force is transmitted to the other of the transmission path and the second transmission path without being affected, and the transport unit is adjusted even when driven by the driving force of the driving source via either the first or the second transmission path. The original can be driven in the same direction by means to convey and unload the original. Therefore, when the conveyance unit is driven via the second transmission path, the driving force is not transmitted to the separation unit via the transmission unit, and the stacked document is newly separated regardless of the stop mode.・ It is not fed.

According to a third aspect of the present invention, in addition to the configuration of the second aspect of the invention, the clutch means transmits a driving force from a driving source to a transport unit in a first transmission path to a second unit.
A first one-way clutch arranged so that the driving force from the driving source via the transmission path is not transmitted to the transport unit; and a first power transmission unit that transmits the driving force from the driving source to the transport unit within the second transmission path. A second one-way clutch arranged so that the driving force from the driving source via the transmission path is not transmitted to the transport unit, and the driving force of one of the forward rotation driving and the reverse rotation driving of the driving source within the first transmission path. A third one-way clutch arranged so as not to receive the other driving force and to receive the other driving force of the forward rotation drive or the reverse rotation drive of the drive source in the second transmission path, and one of the driving forces And a fourth one-way clutch disposed so as not to receive the driving force, wherein the driving direction of the driving force received by the third or fourth one-way clutch in the first or second transmission path is provided as the adjusting means. The reversing gear for reversing provided, is characterized in that for transmitting the driving force in the same direction to the transport unit either when running the transport mode or stop mode.

According to the third aspect of the present invention, while only the driving force of the driving source that drives in one direction of the forward rotation or the reverse rotation is transmitted to the first transmission path by the third one-way clutch, Only the driving force of a driving source that drives in the other direction of the forward rotation drive or the reverse rotation drive is transmitted to the transmission path by the fourth one-way clutch. The driving force transmitted to one of the first or second transmission paths is reversed in driving direction via a reversing gear to have the same driving direction as the driving force transmitted to the other of the first or second transmission paths. You. This driving force is transmitted to the transport unit by the first or second one-way clutch via one of the first transmission path and the second transmission path without affecting the other. Therefore, the drive mode or the stop mode can be executed by driving the commonly used drive source in the forward drive or the reverse drive according to the drive command or the stop command.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the clutch means transmits a driving force from a driving source to a conveying unit in a first transmission path to a second unit.
A first one-way clutch arranged so that the driving force from the driving source via the transmission path is not transmitted to the transport unit; and a first power transmission unit that transmits the driving force from the driving source to the transport unit within the second transmission path. A second one-way clutch arranged so as not to transmit the driving force from the drive source via the transmission path to the transport section, and as the adjusting means, meshing with a drive gear of the drive source to A first transmission gear that meshes with a gear in one of the first and second transmission paths by swinging in accordance with the driving direction and transmits one of forward and reverse driving forces of the driving source; While being engaged with the transmission gear, it swings in accordance with the drive direction of the drive source and meshes with the gear in the other of the first or second transmission path to transmit the other drive force in the forward or reverse direction of the drive source. And a second transmission gear that performs It is characterized in that to transmit the same direction of the driving force to the transport unit either when the stop mode is executed.

According to the fourth aspect of the present invention, the driving force of the driving source is changed to the first or the second which swings according to the driving direction.
Transmitted to the first or second transmission path via the transmission gear,
Only the driving force of a driving source that is driven in one direction by forward rotation or reverse rotation is transmitted to one of the first and second transmission gears by meshing with one of the first and second transmission gears. Alternatively, only the driving force of the drive source that drives in the other direction of the forward rotation drive or the reverse rotation drive by the other transmission gear meshing with the second transmission gear is transmitted. The driving force transmitted through one of the first and second transmission gears is opposite to the driving force transmitted through the other by reversing the driving direction between the first and second transmission gears. And the driving forces of the driving sources that drive in the forward and reverse directions are in the same driving direction. This driving force is applied to the first by the first or second one-way clutch.
It is transmitted to the transport unit via one of the transmission path and the second transmission path without affecting the other. Therefore, the drive mode or the stop mode can be executed by driving the commonly used drive source in the forward drive or the reverse drive according to the drive command or the stop command.

According to a fifth aspect of the present invention, in addition to the configuration of the second aspect of the present invention, the clutch means transmits a driving force from a driving source to a transport unit in a first transmission path to a second unit.
A first one-way clutch arranged so that the driving force from the driving source via the transmission path is not transmitted to the transport unit; and a first power transmission unit that transmits the driving force from the driving source to the transport unit within the second transmission path. A second one-way clutch disposed so as not to transmit the driving force from the driving source via the transmission path to the transporting unit, and is rotatable in a state in which it meshes with the driving gear of the driving source as the adjusting means. A transmission gear, which is supported by and is engaged with a gear in the first or second transmission path in accordance with the rotation direction, to transmit a driving force; and a rotation means for rotating the transmission gear in accordance with a drive command or a stop command; And transmitting the driving force in the same direction to the transport unit regardless of whether the transport mode or the stop mode is executed.

According to the fifth aspect of the invention, the driving force of the driving source is transmitted to the first or second transmission path in which the transmission gear rotated by the rotation means driven according to the driving command or the stop command meshes. , The driving force transmitted through the transmission gear in either of the first and second transmission paths in the same driving direction by the first or second one-way clutch. It is transmitted to the transport unit via one of the paths without affecting the other. Therefore, the drive mode or the stop mode can be executed by driving the rotating means in accordance with the drive command or the stop command and rotating the transmission gear while driving the commonly used drive sources in the same direction.

[0015] The invention according to claim 6 is the invention according to claims 3 to 5.
In addition to the configuration of the invention described in any one of the above, a spring clutch is used as the one-way clutch. In the invention according to claim 6,
The one-way clutch is constituted by a spring clutch. Therefore, the clutch means can be constructed at low cost.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1 to 5 show a first embodiment of a document feeder according to the present invention.
It is a diagram showing an embodiment, the present embodiment claims 1 to 3,
6 corresponds to the invention described in 6. 1 to 3, an original transport device 10 is an apparatus main body H of a copying machine or a facsimile machine.
The document conveying device 10 includes a separating unit 12 that separates and feeds the documents stacked on a document table 11 one by one, and a document that has been separated and fed. And a transport unit 14 that transports the image to the reading position (processing position) P by the optical contact sensor 13 that constitutes the image reading device and carries it out of the device. The separation unit 12 is provided with a pressing plate 21
The pickup roller 22 sends the original bundle pressed down onto the original table 11 to the downstream, and the separation roller 24 moves the lowermost original to the transport unit 14 while restricting the separation pad 23 from sending the original bundle downstream. The sheets are separated and fed one by one. The transport unit 14 transports the document separated and fed by the separation unit 12 to the first
The transport roller 25 is nipped between the driven roller 26 and transported to the reading position P by the optical contact sensor 13, and
The transport roller 27 drives the document passing through the reading position P as a driven roller.
28 and carried out of the device. The separation unit 12 and the conveyance unit 14 are configured to separate and convey a document by using a drive motor 15 in common, and the separation unit 12 includes a separation roller.
The feeding speed of the document by the feed roller 24
A gap is formed between the originals by making the speed of the original lower than the transport speed of the originals by 5 and 27, so that the lever 29 makes it possible to distinguish between the pages.

The document feeder 10 has a first transmission path R1 for transmitting the driving force of the drive motor 15 to both the separation unit 12 and the conveyance unit 14, and a second transmission path R1 for transmitting the driving force only to the conveyance unit 14. The path R2 is constructed by a plurality of gears, belts, and the like. When the start key of the apparatus main body H is pressed (a driving command for document conveyance), the conveyance mode is executed to drive the drive motor 15 in the forward direction ( In the drawing, the separation unit 12 and the conveyance unit 14 are simultaneously driven via the first transmission path R1 by moving the document on the document table 11 continuously to the reading position P (in the direction of arrow A). On the other hand, when the stop key of the apparatus main body H is pressed (an instruction to stop document conveyance) for some reason, the stop mode is executed to drive the drive motor 15 in the reverse direction (in the direction of arrow B in the figure). ) Conveying unit via the transmission route R2
Only the original 14 is driven (without transmitting the driving force via the first transmission path R1), and the original being transported is carried out of the apparatus without feeding the original on the original table 11.

More specifically, the driving force of the driving motor 15 is determined by a transmission gear 32 that meshes with a driving gear 31 of the driving motor 15 to transmit the driving force, and a transmission gear 32 provided coaxially with the transmission gear 32 and in accordance with the driving direction. One-way clutches 33 and 34 for transmitting the driving force, an idler gear (reversing gear) 35 which meshes with the gear portion of the one-way clutch 33 to reversely adjust the driving direction and transmits the driving force, and a pulley for the one-way clutch 34 Belts 37 and 38 which are wound around the pulley portion 36 of the section or idler gear 35 and transmit the driving force.
And one-way clutches 39 and 40 provided coaxially on the drive shaft 25a of the first transport roller 25 and wound around belts 37 and 38 to transmit the driving force according to the driving direction.
An idler gear (transmission means) 44 which meshes with a gear portion 42 of the separation roller 24 and a gear portion 43 provided on the drive shaft 24a of the separation roller 24 to transmit the driving force, and is provided on the drive shaft 25a of the first transport roller 25. Pulley 41 and drive shaft 27 of second transport roller 27
and a belt 46 which is wound around a pulley portion 45 provided at a and transmits the driving force to the conveyance rollers 25 and 27 and / or the separation roller 24 via the first transmission path R1. , Transmission gear 32, one-way clutch 33, idler gear 35, belt 37, one-way clutch 39, idler gear
44 and the belt 46, while the second transmission path R
2 is formed by a transmission gear 32, a one-way clutch 34, a belt 38, a one-way clutch 40 and a belt 46.

The one-way clutches 33 and 34 are shown in FIG.
As shown in the figure, a central shaft formed on one surface side of the transmission gear 32
The spring clutch (third one-way clutch) 51 is connected to the pin 32a via spring clutches 51 and 52.
The transmission gear 32 is fixed to the one-way clutch 33 so as to wind around the central shaft 32a when the transmission gear 32 rotates in the direction of arrow A in FIG. 4, while the spring clutch (fourth one-way clutch) 52 is The one-way clutch 34 is fixedly mounted so as to wind around the central shaft 32a when rotated in the direction of arrow B in FIG. Also, the one-way clutches 39 and 40 are shown in FIG.
As shown in FIG. 5, central shafts 41a and 41b formed on both sides of a pulley portion 41 fixed to the drive shaft 25a of the first transport roller 25.
Are connected via spring clutches 53 and 54 to
The spring clutch (first one-way clutch) 53 is fixed to the one-way clutch 39 so as to wind around the central shaft 41a of the pulley portion 41 when the one-way clutch 39 rotates in the direction of arrow A in FIG. The spring clutch (second one-way clutch) 54 is arranged so that when the one-way clutch 40 rotates in the direction of arrow B in FIG. 5 (the same direction as the direction of arrow A in FIG. 5), it is wound around the central shaft 41b of the pulley portion 41. It is fixed to the direction clutch 40. That is, the spring clutches 51 and 52 and the spring clutches 53 and 54 are a set in which the winding directions are reversed, and the spring clutches 51 and 52 are attached to the center shaft 32a of the transmission gear 32 to be driven in the drive direction (forward direction). The spring clutches 53 and 54 can be connected to the center shafts 41a and 41b on both sides of the pulley portion 41 by driving in the same direction, and idle the driven center shafts 41a and 41b. be able to.

According to this configuration, the transmission gear 32 rotates forward and backward by the drive gear 31 which rotates in the direction of arrow A or the direction of arrow B in FIG. 1 according to the forward or reverse drive of the drive motor 15. In the first transmission path R1, the one-way clutch 33
Is the central axis only when the drive motor 15 is driven forward.
The driving force is transmitted to the idler gear 35, the belt 37 and the one-way clutch 39 by connecting the spring clutch 51 to the spring 32a, while the center shaft 32a of the transmission gear 32 can be idled when performing reverse rotation. And one-way clutch 39
When the idler gear 35 rotates relative to the pulley 41 via the belt 37 in the direction of arrow A in FIG. 5, the spring clutch 53 is connected to the center shaft 41a to rotate the transport rollers 25 and 27. While
When the transport roller 25 is rotated by the driving force via the second transmission path R2, the center shaft 41a of the pulley portion 41 can idle.

On the other hand, in the second transmission path R2, the one-way clutch 34 connects the spring clutch 52 to the center shaft 32a of the transmission gear 32 only when the driving motor 15 is driven to rotate in the reverse direction, thereby transmitting the driving force to the belt 38 and the belt 38. While transmitting to the one-way clutch 40, the central shaft 32a of the transmission gear 32 is used for forward rotation driving.
Can idle. And one-way clutch 40
Is rotated relative to the pulley portion 41 in the direction of arrow B in FIG. 5 when the belt 38 rotates.
When the transport roller 25 is rotated by the driving force via the first transmission path R2, the center shaft 41b of the pulley portion 41 can idle. it can.

Therefore, when the start key of the apparatus main body H is pressed, the one-way clutch 33 is rotated via the transmission gear 32 by the driving force of the drive motor 15 rotating forward.
After the driving direction is reversed by the idler gear 35, the one-way clutch 39 is connected to the pulley portion 41 via the belt 37 and rotated. Thus, the first transport roller 25 is driven to rotate in the document transport direction, the separation roller 24 is driven through the idler gear 44, and the second transport roller 27 is driven through the belt 46 in the document separation / transport direction. Is driven to rotate,
The stacked originals on the original table 11 can be continuously transported (transported and unloaded) to the reading position P continuously. At this time, the one-way clutches 34 and 40 do not rotate so as to transmit the driving torque, and the driving force of the drive motor 15 for forward rotation is bypassed via the one-way clutches 34 and 40, and the one-way clutches 34 and 40 are driven in the opposite direction. No force is input to the drive motor 15.

When the stop key of the apparatus main body H is pressed, the one-way clutch 34 is rotated via the transmission gear 32 by the driving force of the driving motor 15 rotating in the reverse direction, and the driving direction is directly changed via the belt 38. The direction clutch 40 is connected to the pulley portion 41 and rotated. Thereby, the first transport roller 25 is driven to rotate in the transport direction of the document,
The second transport roller 27 is driven to rotate in the document transport direction via the belt 46, so that the document being transported can be carried out of the apparatus. At this time, the one-way clutches 33 and 39 do not rotate so as to transmit the driving torque, and the driving force of the driving motor 15 for reverse rotation is bypassed via the one-way clutches 33 and 39, and the driving force in the opposite direction is changed. Is not input to the drive motor 15. Further, there is no possibility that the separation roller 24 is rotationally driven by the one-way clutch 39 so as to separate and feed the document on the document table 11 via the idler gear 44.

As described above, in the present embodiment, the drive motor 15 is commonly used in the separation section 12 and the transport section 14, and the drive motor 15 is driven to rotate forward in accordance with the transport instruction.
By driving both the separation unit 12 and the conveyance unit 14, the document on the document table 11 can be continuously separated and fed. When a stop command is issued, the drive motor 15 is driven to rotate in the reverse direction. The document in the transport path can be carried out of the apparatus without driving and driving only 14 and separating and feeding a new document. The switching between the document conveyance and the stop operation can be easily realized by inexpensive spring clutches 51 to 54 and gears, and can be performed by simply driving the drive motor 15 forward and reverse.

As another aspect of the present embodiment, although not shown, a pair of transport rollers 25 and 27 are driven so as to transmit the driving force of the drive motor 15 for forward and reverse drive. Are disposed in the first and second transmission paths, and the separation roller 24 is provided with a spring clutch that transmits the driving force of the driving motor 15 that drives the rotation in the forward direction and does not transmit the driving force in the reverse rotation direction. , May be arranged in a transmission path different from the second transmission path to reduce the number of spring clutches. It should be noted that a set of spring clutches for transmitting the driving force of the driving motor 15 for forward and reverse driving to the transport rollers 25 and 27 is provided (the driving direction is reversed in one of the first and second transmission paths). Is sufficient in theory), but a slight shift occurs in the driving speed due to the accuracy of the gear train of the first and second transmission paths.

FIG. 6 is a view showing a second embodiment of the document feeder according to the present invention.
This corresponds to the inventions described in 2, 4, and 6. Note that the basic configuration of this embodiment is substantially the same as that of the above-described first embodiment, and the same components will be described using the same reference numerals and the features will be described. In FIG. 6, as in the first embodiment, the one-way clutches 39 and 40 are rotated by the transmitted driving force of the drive motor 15 in the same manner as in the first embodiment.
By rotating the separation roller 24 together with the conveyance rollers 25 and 27 or only the conveyance rollers 25 and 27, the stacked documents on the document table 11 are continuously conveyed to the reading position P, and the documents being conveyed are unloaded from the apparatus. Instead of the transmission gear 32, the one-way clutches 33, 34, and the idler gear 35 in the first embodiment, the one-way clutches 39, 40 have pulleys around which belts 37, 38 are wound. Oscillating gears (first and second transmission gears) 63 and 64 that oscillate according to the driving direction of the drive motor 15 mesh with gear portions formed on the drive motor 15, so that the drive motor 15 The driving force is transmitted.

The oscillating gears 63 and 64 are rotatable about an oscillating bracket 65 (only a part of which is shown in the drawing) held rotatably (oscillating) coaxially with the drive gear 31 of the drive motor 15. The oscillating gear 63 meshes with the driving gear 31 of the driving motor 15 to oscillate according to the driving direction and transmits the driving force to the oscillating gear 64. .

According to this configuration, when the drive gear 31 of the drive motor 15 is driven to rotate forward, the swing bracket 65 and the swing gears 63 and 64 swing in the direction of arrow A in FIG. When the gear 63 meshes with the pulley 61, the driving force of the driving motor 15 whose driving direction has been reversed can be transmitted to the one-way clutch 39 via the belt 37. The swing bracket 65 and the swing gears 63 and 64 swing in the direction of arrow B, and the swing gear 64
The driving force of the driving motor 15 whose driving direction has been inverted again by the swing gear 64 can be transmitted to the one-way clutch 40 via the belt 38. That is,
The pulley 61 and the oscillating gear 63 constitute a first transmission path R1, and the pulley 62 and the oscillating gears 63 and 64 constitute a second transmission path R2.
Is composed.

Therefore, similar to the first embodiment,
When the start key of the apparatus main body H is pressed, the drive motor 15 is driven to rotate forward, whereby the swing gear 63 and the pulley 61 are driven.
The one-way clutch 39 on which the belt 37 is wound can be rotated via the, and the stacked originals on the original table 11 are continuously read by the rotation of the first and second transport rollers 25 and 27 and the separation roller 24. It can be continuously transported to the position P. When the stop key of the apparatus main body H is pressed, the drive motor 15 is driven to rotate in the reverse direction, so that the swing gears 63 and 64 are driven.
The one-way clutch 40 around which the belt 38 is wound can be rotated via the pulley 62, and the original being conveyed can be carried out of the apparatus by rotating only the first and second conveying rollers 25 and 27. it can.

As described above, also in the present embodiment, the operation and effect of the first embodiment can be obtained. Further, in the present embodiment, instead of the spring clutches 51 and 52, pulleys 61 and 62 and swing gears 63 and 64 can be used to switch the document conveyance / stop operation and adjust the driving direction thereof, and the configuration is improved. It can be simpler and can be constructed inexpensively.

FIG. 7 is a diagram showing a third embodiment of the document feeder according to the present invention.
This corresponds to the inventions described in 2, 5, and 6. Note that the basic configuration of this embodiment is substantially the same as that of the above-described first embodiment, and the same components will be described using the same reference numerals and the features will be described. In FIG. 7, as in the first embodiment, the one-way clutches 39 and 40 are rotated by the transmitted driving force of the drive motor 15 in the same manner as in the first embodiment.
By rotating the separation roller 24 together with the conveyance rollers 25 and 27 or only the conveyance rollers 25 and 27, the stacked documents on the document table 11 are continuously conveyed to the reading position P, and the documents being conveyed are unloaded from the apparatus. Instead of the transmission gear 32, the one-way clutches 33, 34, and the idler gear 35 in the first embodiment, the one-way clutches 39, 40 have pulleys around which belts 37, 38 are wound. Oscillating gear (transmission gear) that oscillates on gears formed on 71 and 72
The driving force of the drive motor 15 is transmitted by the engagement of the 73.

The oscillating gear 73 is provided together with an oscillating gear 74 on an oscillating bracket 75 (only a part of which is shown in the figure) which is held coaxially with the driving gear 31 of the driving motor 15 so as to be rotatable (oscillating). The swing gear 74 is rotatably meshed with each other and supported in series. The swing gear 74 meshes with the drive gear 31 of the drive motor 15 to transmit the driving force to the swing gear 73. The swing bracket 75 rotatably supports the swing gears 73 and 74 at one end, and is connected at the other end thereof to a solenoid (rotating means) 77 through which a shaft 76 is inserted and withdrawn. 77
Is the drive motor by pressing the start key on the main unit H.
When the drive motor 15 is driven in the same direction by pressing the stop key of the apparatus main body H while the swing bracket 75 is swung in the direction of arrow A in FIG. The swing bracket 75 is swung in the direction of arrow B in FIG.

According to this configuration, the swing bracket 75 and the swing gears 73, 74 swing according to the drive direction of the solenoid 77, regardless of the drive direction of the drive motor 15, and the swing gear 73 is moved. By engaging with pulley 71 or pulley 72,
The driving force of the driving motor 15 that drives in the same direction is
It can be transmitted to one-way clutches 39, 40 via 38. That is, the pulleys 71 and 72 and the swing gears 73 and 74 form the first and second transmission paths R1 and R2.

Accordingly, similarly to the above-described embodiment, the drive motor 15 starts to be driven by pressing the start key of the apparatus main body H, and the solenoid 77 swings the swing gear 73 to mesh with the pulley 71. The one-way clutch 39 can be rotated via the belt 37, and the stacked originals on the original table 11 are continuously moved to the reading position P by the rotational driving of the first and second transport rollers 25 and 27 and the separation roller 24. Can be transported. Also, the one-way clutch 40 can be rotated via the belt 38 by the solenoid 77 swinging the swing gear 73 and meshing with the pulley 72 in response to the depression of the stop key of the apparatus main body H. The original being conveyed can be carried out of the apparatus by rotating only the second conveying rollers 25 and 27.

As described above, also in this embodiment, the operation and effect of the above-described embodiment can be obtained. In the present embodiment, instead of the spring clutches 51 and 52, the pulley 7 is driven without switching the drive direction of the drive motor 15.
1, 72, oscillating gears 73, 74, and solenoid 77 can switch the operation of conveying and stopping the original, so that the configuration can be simplified and the cost can be reduced.

Although not particularly described in the above-described embodiment, after a lapse of time such that the stop key of the apparatus main body H is depressed and the original being conveyed is carried out of the apparatus has elapsed,
It goes without saying that the drive of the drive motor 15 is stopped.

[0037]

According to the present invention, the separation unit and the conveyance unit can be driven during document conveyance to continuously separate and convey the stacked originals. Can be transported out of the apparatus without separating and feeding a new document. The transport unit and the separation unit can be driven by using a common drive source, and the drive / stop can be switched by switching the drive direction of the drive source by using an inexpensive one-way clutch or gear structure such as a spring clutch. This can be realized by a simple and inexpensive mechanism that only swings and rotates the gear, and the stop operation can be easily performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of a document feeder according to the present invention, and is a front perspective view showing a schematic overall configuration thereof.

FIG. 2 is a partial cross-sectional top view showing the driving mechanism.

FIG. 3 is a perspective view showing the driving mechanism.

FIG. 4 is an exploded perspective view showing a main part thereof.

FIG. 5 is an exploded perspective view showing a main part of a part different from FIG.

FIG. 6 is a diagram showing a second embodiment of the document feeder according to the present invention, and is a front perspective view showing a schematic overall configuration thereof.

FIG. 7 is a diagram illustrating a second embodiment of the document feeder according to the present invention, and is a front perspective view illustrating a schematic overall configuration thereof.

[Explanation of symbols]

 10 Document feeder 12 Separation unit 14 Transport unit 15 Drive motor (drive source) 23 Separation pad 24 Separation roller 25, 27 Transport roller 26, 28 Follower roller 31 Drive gear 32 Transmission gear 33, 34, 39, 40 One-way clutch 35 Idler gear (reversing gear) 37, 38, 46 Belt 41 Pulley 44 Idler gear (transmission means) 51 Spring clutch (third one-way clutch) 52 Spring clutch (fourth one-way clutch) 53 Spring clutch (first one-way clutch) 54 Spring clutch (Second one-way clutch) 61, 62, 71, 72 Pulley 63, 64 Swing gear (first, second transmission gear) 65, 75 Swing bracket 73, 74 Swing gear (transmission gear) 77 Solenoid (rotation) Means) P reading position (processing position)

Claims (6)

[Claims] A separating unit that separates and feeds stacked originals one by one; a conveying unit that conveys the separated and fed originals to a processing position of the apparatus main body and unloads the originals from the processing position;
The drive source is commonly used in the transport unit and the separation unit, and the separation and feeding speed by the separation unit is made slower than the transport speed by the transport unit. A first transmission path for transmitting the driving force of the driving source to the conveying unit and the separating unit, and a second transmitting path for transmitting the driving force of the driving source only to the conveying unit.
A transfer path, a transfer mode for transmitting a driving force via the first transfer path in accordance with a drive command for document transfer, simultaneously driving both the separation unit and the transfer unit, and continuously transferring the stacked documents to the processing position of the apparatus body; Switching means for transmitting a driving force via a second transmission path in accordance with a document transport stop command to drive only the transport unit to execute a stop mode in which a transport document is unloaded is provided. A document feeder characterized by the following: 2. The switching means, wherein a driving force from a driving source via a first transmission path is transmitted to a transport section, and a driving force from a driving source via a second transmission path is not transmitted to a transport section. (2) clutch means for transmitting the driving force from the driving source via the transmission path to the transport unit and not transmitting the driving force from the driving source via the first transmission path to the transport unit; The transmission means for transmitting the transmitted driving force to the separation unit, and the transmission means in the first or second transmission path so that the driving force transmitted to the conveyance unit is in the same direction regardless of whether the conveyance mode or the stop mode is executed. 2. The document feeder according to claim 1, further comprising an adjusting unit that transmits a driving force. 3. The clutch means for transmitting a driving force from a driving source to a transport unit within a first transmission path and transmitting a driving force from a driving source via a second transmission path to the transport unit. And a first one-way clutch disposed in the second transmission path to transmit the driving force from the driving source to the transport unit in the second transmission path, and
A second one-way clutch arranged so that the driving force from the driving source via the transmission path is not transmitted to the transport unit, and the driving force of one of the forward rotation driving and the reverse rotation driving of the driving source within the first transmission path. A third one-way clutch arranged to receive and not receive the other driving force;
A fourth one-way clutch disposed so as to receive the other drive force of the forward rotation drive or the reverse rotation drive of the drive source in the second transmission path and not to receive one of the drive forces; , Third in the first or second transmission path
Or a reversing gear for reversing the driving direction of the driving force received by the fourth one-way clutch, and transmitting the driving force in the same direction to the conveying unit regardless of whether the conveying mode or the stop mode is executed. 3. The document feeder according to 2. 4. The clutch means for transmitting a driving force from a driving source to a transport unit within a first transmission path and transmitting a driving force from a driving source via a second transmission path to the transport unit. And a first one-way clutch disposed in the second transmission path to transmit the driving force from the driving source to the transport unit in the second transmission path, and
A second one-way clutch arranged so that the driving force from the driving source via the transmission path is not transmitted to the transport unit. A first transmission gear that meshes with a gear in one of the first and second transmission paths by swinging in accordance with the driving direction and transmits one of forward and reverse driving forces of the driving source; While being engaged with the transmission gear, it swings in accordance with the drive direction of the drive source and meshes with the gear in the other of the first or second transmission path to transmit the other drive force in the forward or reverse direction of the drive source. 3. The document conveying apparatus according to claim 2, further comprising: a second transmission gear that transmits a driving force in the same direction to the conveying unit regardless of whether the conveying mode or the stop mode is executed. 5. The clutch means, wherein a driving force from a driving source in a first transmission path is transmitted to a conveying section, and a driving force from the driving source in a second transmission path is not transmitted to the conveying section. And a first one-way clutch disposed in the second transmission path to transmit the driving force from the driving source to the transport unit in the second transmission path, and
A second one-way clutch disposed so that the driving force from the driving source via the transmission path is not transmitted to the transporting unit; and A transmission gear, which is supported by and is engaged with a gear in the first or second transmission path in accordance with the rotation direction, to transmit a driving force; and a rotation means for rotating the transmission gear in accordance with a drive command or a stop command; 3. The document feeder according to claim 2, wherein a driving force in the same direction is transmitted to the feeder in any of the transfer mode and the stop mode. 6. The document feeder according to claim 3, wherein a spring clutch is used as said one-way clutch.