JPH1072130A - Automatically document-carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability of the replacement of parts and maintenance by installing a separating rotary body and a guide plate, and freely mounting/ demounting a driving shaft on which a calling-out roller is installed through a driving force transmitting member on/from this device main body. SOLUTION: A separating belt 11 is bridged over a driving roller 15 and a driven roller 16, and the driving roller 15 is connected to a case 17 through a driving shaft 15a. The case 17 can freely turn with the driving shaft 15a as the center, and a guide plate 51 is swingingly installed on the driving shaft 15a. A calling-out roller 10 is turnably supported in the case 17, and a driving gear 55 is fixed to the driving shaft 15a, and rotation of the driving shaft 15a is transmitted to the calling-out roller 10 through an idler gear 56 and a belt 59. In the driving shaft 15a, a freely slidable cylindrical member 63 with which a spring 60 comes into contact is arranged in one end part, and an engaging member 62 is arranged in the other end part. The engaging member 62 and the cylindrical member 63 are engaged with an engaging groove of a main body frame, and the driving shaft 15a is made freely mountable on and demountable from a main body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic document feeder mounted on an image reading apparatus such as a copying machine, a facsimile machine, a scanner, and the like. The present invention relates to an automatic document feeder capable of easily performing replacement and maintenance of members constituting a separation / feeding system that conveys toward a reading position.

[0002]

2. Description of the Related Art Conventionally, in an image reading apparatus such as a copying machine, a facsimile apparatus, and a scanner, when a document bundle including a plurality of documents is placed on a document placing table and a job start switch is pressed, the document Are separated one by one and conveyed to a reading position. At the reading position, the document is read by the image reading means of the image forming apparatus. When the reading is completed, the document is discharged to a predetermined discharge position. Some have an automatic document feeder. For example,
The one described in Japanese Patent No. 3153 is known.

[0003] This document is provided with a document mounting table on which a document bundle composed of a plurality of documents can be placed, a call roller for feeding the document bundle placed on the document mounting table, and a sliding roller slidable on a transport roller. The separation is performed such that the uppermost document is separated one by one from the document bundle by nipping the document bundle fed by the call roller together with the transport roller, and is transported toward the reading position through a reversing path for reversing the separated document. A belt, and a guide plate that extends a predetermined length in the document conveyance direction and forms a conveyance path that guides the document toward the reversing path by slidingly contacting the width direction of the document bundle fed by the call roller. , Is provided.

[0004] The above-mentioned call roller, separation belt and guide plate are integrally attached to a drive shaft.
The driving force from the sheet feeding motor is transmitted to the call roller and the separation belt via a driving shaft.

[0005]

However, in such a conventional automatic document feeder, there is a paging roller,
The separation belt and the guide plate are fixed to the drive shaft, but this drive shaft was fixed to the main body of the device and could not be easily attached or detached. Therefore, each member must be attached to and detached from the main body of the apparatus in a number of steps, and the workability of the replacement work and the maintenance work of each part is very poor.

[0006] Even if the guide plate is not provided integrally with the drive shaft, there is no device in which the call roller or the separation belt is detachably attached to the drive shaft. When replacing or performing maintenance, it is necessary to perform a lot of work using tools, etc., and the replacement work and maintenance work are very poor. Was.

The invention according to any one of the first to fourth aspects of the present invention provides a drive shaft to which a call roller, a separation rotating body and a guide plate are attached detachably with respect to the main body of the apparatus, and exchange and maintenance of these parts. It is an object of the present invention to provide an automatic document feeder capable of improving work efficiency. According to a fifth or sixth aspect of the present invention, the drive shaft to which the call roller and the separation rotating body are attached is detachably mountable to the main body of the apparatus to improve the workability of replacement and maintenance work of these parts. It is an object of the present invention to provide an automatic document feeder capable of performing the following.

[0008]

According to the first aspect of the present invention,
In order to solve the above-mentioned problems, an original mounting table on which an original bundle composed of a plurality of originals can be mounted, a call roller for feeding the original bundle mounted on the original mounting table, and a sliding contact with a partner member can be provided. And the reading position is passed through a reversing path for nipping the original bundle fed by the retrieving roller together with the partner member to separate the uppermost original from the original bundle one by one, and inverting the separated original. A separating rotating body that is transported toward
A guide plate that extends a predetermined length in the document transport direction and forms a transport path that guides the document toward the reverse path by slidingly contacting in the width direction of the document bundle fed by the call roller. Wherein the separation rotating body and the guide plate are attached to a drive shaft, and a call roller is attached to the drive shaft via a drive force transmitting member, and the drive shaft is detachable from the main body of the apparatus. .

In this case, the guide plate, the call roller and the separation rotary member are mounted on the drive shaft to form a unit, and the drive shaft is attached to and detached from the main body of the apparatus. The attachment and detachment work is easily performed, and the workability of replacement and maintenance work of these members is greatly improved. According to a second aspect of the present invention, in order to solve the above-mentioned problem, in the first aspect of the present invention, the guide plate is detachably attached to a drive shaft.

In this case, when the unitized guide plate, the call roller and the separation rotating body are detached from the main body of the apparatus, only the guide plate is detached from the drive shaft. Work operability is greatly improved. According to a third aspect of the present invention, in order to solve the above problems, in the first or second aspect of the invention, the call roller is held by a call roller holder together with a driving force transmitting member, and the call roller holder is moved relative to a drive shaft. It is characterized by being detachable.

In this case, when the unitized guide plate, call roller and separation rotating body are detached from the main body of the apparatus, the call roller is detached from the drive shaft together with the driving force transmitting member. The workability of replacement and maintenance work is greatly improved. According to a fourth aspect of the present invention, in order to solve the above-mentioned problem, in the third aspect of the present invention, the separation rotating body is provided so as to be able to approach and separate from a driving roller fixed to a driving shaft and the driving roller. A driven roller provided, a separation belt stretched between the driven roller and the driving roller, and an urging member for applying tension to the separation belt by urging the driven roller in a direction away from the driving roller. The driven roller is moved closer to or away from the driving roller side to apply or release the tension of the separation belt to make the separation belt detachable from the drive shaft.

In this case, when the unitized guide plate, calling roller and separation belt are detached from the main body of the apparatus, the separation belt is attached to and detached from the drive shaft.
The workability of replacement and maintenance work of the separation belt is greatly improved. According to a fifth aspect of the present invention, there is provided an original placing table on which a bundle of originals including a plurality of originals can be placed, and a call roller for feeding the bundle of originals placed on the original placing table. , Provided so as to be slidably contacted with a predetermined partner member, sandwiching the document bundle fed by the call roller together with the partner member, separating the topmost document one by one from the document bundle, and A separation rotating body that conveys toward the reading position through a reversing path for reversing the original, and the separation rotating body is attached to a drive shaft, and a call roller is attached to the drive shaft via a driving force transmission member. The drive shaft is configured to be detachable from the apparatus main body, the call roller is held by a call roller holder together with a driving force transmitting member, and the call roller holder is detachable from the drive shaft.

In this case, when the unitized call roller and the separated rotary body are detached from the main body of the apparatus, the call roller is detached from the drive shaft. Is greatly improved. According to a sixth aspect of the present invention, in order to solve the above-mentioned problem, in the fifth aspect of the present invention,
A drive roller fixed to a drive shaft, a driven roller provided to be able to approach and separate from the drive roller, a separation belt stretched between the driven roller and the drive roller, and a drive roller And an urging member that applies tension to the separation belt by urging in a direction away from the driving roller, by making the driven roller approach or separate from the driving roller side.
It is characterized in that the tension of the separation belt is applied or released to make the separation belt detachable from the drive shaft.

In this case, when the unitized calling roller and the separation belt are detached from the main body of the apparatus, the separation belt is detached from the drive shaft, so that the workability of replacement and maintenance of the separation belt is improved. It is greatly improved.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show an embodiment of the automatic document feeder according to the present invention, and show an example in which the automatic document feeder is mounted on an image reading apparatus. The image reading apparatus can be applied to a copying machine, a facsimile machine, a scanner, and the like.

First, the configuration will be described. In FIG. 1, 1
Is an image reading device, on the upper surface of which is provided a slit glass 2 and a contact glass 3. Below the slit glass 2 and the contact glass 3, an exposure lamp 4 and a first mirror 5 are provided.
When reading the original placed on the contact glass 3, the exposure lamp 4 and the first mirror 5 move below the contact glass 3 in the left-right direction in FIG. When reading the document, the document is stopped below the slit glass 2, the surface of the document is read by the exposure lamp 4, and the reflected light is transmitted through a first mirror 5 and a lens (not shown) to an image forming element such as a CCD as is known. It is designed to form an image on the child.

An automatic document feeder (hereinafter, simply referred to as an ADF) 6 is mounted on an upper portion of the image reading device 1, and a document placed on the contact glass 3 is attached to a lower surface of the ADF 6. And a reflection plate 7 serving as a white reference when reading the original.
The ADF 6 is connected to the image reading device 1 via a hinge 8 as shown in FIG.
Can be opened and closed freely.

A document placing table 9 is provided above the ADF 6, and a document bundle P composed of a plurality of documents is placed on the document placing table 9. The original bundle P placed on the original placing table 9 contacts the original bundle P.
After being fed by the separable calling roller 10, the sheet is separated by a separation belt 11 and a separation prevention roller (counterpart member) 12. The separation belt 11 is separated from the separation prevention roller 12 by an arbitrary angle θ. Pressing and contacting.

A stopper member 13 is provided downstream of the page roller 10 in the document conveying direction. The document bundle P placed on the document table 9 is stopped by the stopper member 13 and is moved to the separation belt 11 side. It is forbidden to enter. Call roller
A pressure plate 14 is provided below the pressure plate 10.
Is contacted to and separated from the call roller 10 by a solenoid (not shown). That is, this pressure plate
When the copy start switch is pressed, the solenoid moves from a position separated from the call roller 10 indicated by a solid line to a position contacting the call roller 10 indicated by a virtual line by a solenoid, and presses the original against the call roller 10. The original is fed by the call roller 10.

The separation belt 11 is bridged by a driving roller 15 and a driven roller 16, and the driving roller 15 is connected to a case (calling roller holder) 17 via a driving shaft 15a.
The case 17 is rotatable about a drive shaft 15a, and the call roller 10 is attached to the case 17. Thus, when the case 17 rotates about the drive shaft 15a as a fulcrum, the call roller 10 is separated from the document bundle P. When the driven roller 16 is rotated about the drive shaft 15a in this state, the separation belt 11 is separated from the separation preventing roller 12. The case 17 is connected to a frame of the ADF 6 via a drive shaft 15a. A paper feeding unit case 18 is provided on the side of the ADF 6 main body.
AD through a fulcrum 19 consisting of a shaft provided on the DF6 main body.
The paper feed unit is rotatably attached to the F6 main body so that the paper feed unit is exposed when opened.

The driven roller 16 is urged by a spring 20, and the separation belt is
11 has a constant tension. Also, drive roller 15
A one-way clutch 21 is provided between the drive shaft 15 a and the drive roller 15.
Rotate clockwise. Also, the separation preventing roller 12 is shown in FIG.
The uppermost document is separated from the document bundle P fed between the separation belt 11 and the separation preventing roller 12 in a clockwise direction.

The original separated by the separation belt 11 and the separation preventing roller 12 is reversed along a reversing path 25 by a first conveying roller 23 and a driven roller 24 on the driving side, and is conveyed toward the slit glass 2. It has become. In addition, as shown in FIG.
A guide plate 51 is provided between the guide plates.
Is swingably mounted on the drive shaft 15a as shown in FIG. The guide plate 51 extends by a predetermined length in the document transport direction, and is slidably contacted in the width direction of the document bundle fed by the call roller 10 to guide the document toward the reversing path 25. The guide plate 51 slides in the width direction of the document at both ends of the document to prevent the edge of the document width from floating.

The driven roller 24 is mounted on a lever 26 which is rotatably mounted on a fulcrum 19.
Is pressed against the first transport roller 23 by a spring 27 for pressing the roller. The first transport roller 23 and the driven roller 24 pinch the separated document and transport it to the slit glass 2 through the reversing guide 28, and then transport the original so as to be picked up by the reversing discharge guide 29 to the paper discharge path 30. Has become. Further, a reflection guide plate 31 is provided on the slit glass 2, and this reflection guide plate 31 constitutes a white reference at the time of reading.

The original conveyed to the paper discharge path 30 is conveyed while being sandwiched between the second conveying roller 32 and the driven roller 33 on the driving side, and then is transferred to the paper discharging roller 34 and the driven roller 35 on the driving side. The paper is nipped and discharged to the outside from the paper discharge path 30, discharged by the discharging brush 36, and then discharged onto the outer cover 37. On the other hand, the reflecting plate 7 that covers the contact glass 3 is provided on the lower surface of the pressing plate 38, and the pressing plate 38 presses a document placed on the contact glass 3 against the glass 3. .

The pressing plate 38 is rotatably mounted on a main frame 40 via a fulcrum 39. The main frame 40 has an end mounted on the shaft of a driven roller 35, and an ADF 6
Fixed to the body. The main frame 40 has an area that covers the contact glass 3, and an outer cover 37 is attached to the upper surface thereof, and forms a document discharge table together with the outer cover 37. The pressing plate 38 is connected to an auxiliary frame 42 via a link 41 (only one of the links 41 is shown in FIG. 1), and the auxiliary frame 42 sandwiches the outer peripheral portion of the main frame 40. Thus, it is formed in a substantially U-shape, and is rotatably connected to the main frame 40 via a fulcrum 43.

The main frame 40 has a magnet 44
Is provided, and this magnet 44 is
Is sucking. The auxiliary frame 42 may be entirely made of metal, or may be entirely made of an elastic member such as plastic so that only the portion attracted to the magnet 42 is made of metal. The suction means is not limited to a magnet, but may be any member as long as it sucks the auxiliary frame 42 into the main frame 40.

Further, the tip of the auxiliary frame 42 (in FIG. 1,
A guide plate 42a constituting a part of the paper discharge path 30 is provided on the left end).
The driven roller 33 is rotatably provided on the guide plate 42a. The guide plate 42a is provided with a stamp unit 45. The stamp unit 45 is provided on the downstream side in the transport direction of the document passing through the slit glass 2 by causing the stamp to protrude and retract from the guide plate 42a by a solenoid (not shown). Is stamped at a predetermined position. The stamp is detachably provided to the stamp unit 45, and is replaced when a predetermined number of stamping operations (for example, 3000 times or more) are completed.

The auxiliary frame 42 near the guide plate 42a
The part is provided with a handle 46, which can be gripped by a user. Also, the mainframe 40
Is provided with a stopper 47.
1 abuts on the base end (the right end in FIG. 1) of the auxiliary frame 42 to prohibit the auxiliary frame 42 from rotating more than a predetermined amount counterclockwise about the fulcrum 43. In addition,
In FIG. 1, reference numeral 48 denotes a driven roller that slides on the separation belt 11.

On the other hand, as shown in FIG. 6, the guide plate 51 is swingably mounted on the drive shaft 15a, and a notch 51a formed at a predetermined position engages with and disengages from the drive shaft 15a. By combining, it is configured to be detachable from the drive shaft 15a. The driving roller 15 is a one-way clutch 21
Is attached to the drive shaft 15a via the
A pair of belt holders 52 are provided at both ends of the 15. As shown in FIG. 5, the belt holder 52 has a notch 52a extending from the central portion in a direction away from the driving roller 15, and a spring (biasing member) 20 is provided in each of the notches 52a. Installed.

The shaft of the driven roller 16 is housed in the notch 52a, and the driven roller 16 slides in the notch 52a so as to be able to approach and separate from the driving roller 15. Has become. Further, the spring 20 urges the driven roller 16 in a direction away from the drive roller 15, and thus urges the driven roller 16 to apply tension to the separation belt 11.

Further, by bringing the driven roller 16 close to the driving roller 15 against the urging force of the spring 20, the tension applied to the separation belt 11 is released and the separation belt 11 is moved with respect to the driving shaft 15a. Detachable. The separation belt
When the drive 11 is removed from the drive shaft, the drive roller 16 comes out of the notch 52a, and is removed from the belt holder 52. In this embodiment, the separation belt 11, the driving roller 15, the driven roller 16
And the spring 20 forms a separation rotating body.

The call roller 10 is rotatably supported by a case 17, and the case 17 has a notch 17a formed at a predetermined position as shown in FIGS. By joining and detaching, it is detachable from the drive shaft 15a. A drive gear 55 is fixed to the drive shaft 15a, and the drive gear is configured to transmit a driving force from a sheet feeding motor via a gear (not shown). The drive gear 55 meshes with a belt gear 57 via an idler gear 56 rotatably mounted on the case 17, and the belt gear 57 is connected to a belt gear 58 via a belt 59. These belt gears 57 and 58 are rotatably provided on the case 17, and when the drive gear 55 rotates, that is, when the drive shaft 15a rotates, this rotation is transmitted to the ring roller 10 via the idle gear 56 and the belt 59. It has become so. In the present embodiment, the idler gear 56, the belt gears 57, 58, and the belt 59 constitute a driving force transmitting member.

A spring is provided at one end of the drive shaft 15a.
One end of the spring 60 is in contact with a cylindrical member 63 slidably provided on one end of the drive shaft 15a, and the other end of the spring 60 is engaged with the end of the drive shaft 15a. It is in contact with the stopped ring 61. An engaging member 62 is provided at the other end of the drive shaft 15a.
6 is adapted to be engaged with an engagement groove formed in the body frame.

One end of the drive shaft 15a is also engaged with an engagement groove formed in the ADF 6 main body frame, and the cylindrical member 63 is engaged with the engagement groove of the frame to form a cylindrical member. After the member 63 is moved toward the other end of the drive shaft 15a along the drive shaft 15a against the urging force of the spring 60, the engaging member 62 is engaged with the engagement groove of the frame. Accordingly, the cylindrical member 63 is urged toward one end of the drive shaft 15a and is supported by the frame.

After the engagement member 62 is removed from the engagement groove of the frame, the link 61 is removed from the engagement groove, so that the urging force of the spring 60 is released and the drive shaft 15a is released.
Is removed from the frame. That is, the drive shaft 15a of the present embodiment is detachable from the ADF 6 main body. Next, the operation will be described.

When the original bundle P is placed on the original placing table 9 with the original surface facing upward and the start switch is depressed, the pressing plate 14 presses the original bundle P against the call roller 10, and the call roller 10 is pressed. The document bundle is conveyed toward the separation belt 11 by this. At this time, the drive gear 5
5. Since the power is transmitted to the paging roller 10 via the idle gear 56 and the belt 59, the paging roller 10 and the driving roller 15 are rotated.

After the uppermost document is separated by the separation belt 11 and the separation preventing roller 12, the document bundle P is reversed by the first transport roller 23 and the driven roller 24.
After being conveyed onto the slit glass 2 along 25, the original surface is read by the exposure lamp 4 and the first mirror 5 and the like by the slit glass 2. After the reading is completed, the original is conveyed on the conveyance path 30 by the second conveying roller 32 and the driven roller 33, and then is discharged onto the outer cover 37 by the sheet discharging roller 34 and the driven roller 35. The stamp 50 of the stamp unit 45 is provided at the rear end of the document that has passed through the slit glass 2.
Thus, the read stamp S is stamped.

On the other hand, when replacing or performing maintenance on the call roller 10, the paper feed belt 11, and the guide plate 51, which constitute a part of the separation / feed system, after the feed unit case 18 is opened, the drive shaft 15a is removed from the frame of the ADF6 body. At this time, the call roller 10, the paper feed belt 11, and the guide plate 51 are integrally attached to the drive shaft 15a to form a unit, and thus are integrally removed together with the drive shaft 15a.

When the guide plate 51 is replaced or maintained, the guide plate 51 is pulled in a predetermined direction because the notch 51a is engaged with the drive shaft 15a. It is easily removed from the drive shaft 15a. When the replacement or maintenance of the call roller 10 is performed, since the notch 17a is engaged with the drive shaft 15a, the case 17 is pulled in a predetermined direction as shown in FIG. It is easily removed from 15a.

When the replacement or maintenance of the separation belt 11 is performed, the driven roller 16 is biased by the spring 20 while the case 17 and the guide plate 51 are removed from the drive shaft 15a as shown in FIG. The tension of the separation belt 11 is released by approaching the notch 52 toward the drive roller 15 side. In this state, the separation belt
By moving 11 along the drive shaft 15a, the drive shaft
Remove from 15a.

When the replacement or maintenance of the above members is completed, the separation belt 11 is inserted through the drive shaft 15a and moved to the drive roller 15 along the drive shaft 15a. The separation belt 11 is moved closer to the drive roller 15 in the notch 52 against the urging force of the spring 20 and then separated from the drive roller 15 in the notch 52 by the urging force of the spring 20. The separation belt 11 is attached by applying tension.

When the call roller 10 is mounted, the notch 17a is engaged with the drive shaft 15a, and the drive gear 55 is meshed with the idler gear 56. When mounting the guide plate 51, the notch 51a is engaged with the drive shaft 15a. At this time, the call roller 10, the separation belt 11, and the guide plate 51 are unitized together with the drive shaft 15a. The unit is attached to the frame by engaging the drive shaft 15a with the engagement groove of the frame of the ADF 6 body. Can be

As described above, in the present embodiment, the separation belt 11
And the guide plate 51 is attached to the drive shaft 15a, and the calling roller 10 is connected to the drive gear 55, idler gear 56, belt gear 5
The drive shaft 15a is attached to the drive shaft 15a via a drive force transmitting member composed of the belt 7, and the belt 59, and the drive shaft 15a is detachable from the ADF 6 main body.
In addition, the separation belt 11 can be unitized with the drive shaft 15a, and the work of attaching and detaching the guide plate 51, the call roller 10, and the separation belt 11 can be easily performed. As a result, it is possible to greatly improve the workability of the replacement and maintenance work of these members.

Further, since the guide plate 51 is detachable from the drive shaft 15a, only the guide plate 51 is driven when the unitized guide plate 51, the call roller 10 and the separation belt 11 are removed from the ADF 6 main body. It can be attached to and detached from the shaft 15a, and the workability of replacement and maintenance work of the guide plate 51 can be greatly improved. Also, the call roller 10 is held in the case 17 together with the driving force transmitting member,
Since the case 17 is detachable from the drive shaft 15a, when the unitized guide plate 51, the call roller 10 and the separation belt 11 are removed from the ADF 6, the call roller is removed.
Both the driving force transmission member 10 and the driving force transmission member can be attached to and detached from the driving shaft 15a, so that the workability of the replacement and maintenance work of the calling roller 10 can be greatly improved.

Further, the driven roller 16 is moved toward or away from the driving roller 15 against the urging force of the spring 20 to apply or release the tension of the separation belt 11 to move the separation belt 11 to the driving shaft 15a. Guide plate 51, call roller 10 and separation belt
When the separation belt 11 is detached from the ADF 6, the separation belt 11 can be detached from the drive shaft 15a.
Workability of replacement and maintenance work can be greatly improved.

In this embodiment, the guide plate 51 is detachably mounted on the drive shaft 15a. However, the guide plate 51 is supported by another support means different from the drive shaft 15a. Is also good. In this case, at least 10
The case 17 having the above structure and the separation belt 11 having the above structure may be detachably attached to the drive shaft 15a. Even in this case, when the unitized paging roller 10 and separation belt 11 are removed from the ADF 6 main body, the paging roller 10
And the driving force transmitting member or the separation belt 11 can be independently attached to and detached from the drive shaft 15a, and the workability of replacement and maintenance work of the call roller 10 or the separation belt 11 can be greatly improved. .

[0047]

According to the first aspect of the present invention, the work of attaching and detaching the guide plate, the calling roller, and the separation rotating body can be easily performed, and the workability of replacement and maintenance work of these members is greatly improved. Can be done. According to the invention described in claim 2, a unitized guide plate,
When the call roller and the separation rotary member are removed from the main body of the present apparatus, only the guide plate can be detached from the drive shaft, and the workability of guide plate replacement and maintenance work can be greatly improved.

According to the third aspect of the present invention, when the unitized guide plate, the call roller and the separation rotary member are removed from the main body of the apparatus, the call roller and the driving force transmitting member are attached to and detached from the drive shaft. Therefore, the workability of the replacement of the call rollers and the maintenance work can be greatly improved. According to the fourth aspect of the present invention, when the unitized guide plate, calling roller and separation belt are removed from the main body of the apparatus, the separation belt can be detached from the drive shaft, and the separation belt can be replaced. In addition, workability of maintenance work can be greatly improved.

According to the fifth aspect of the present invention, when the unitized call roller and the separated rotating body are detached from the main body of the apparatus, the call roller can be detached from the drive shaft, and the call roller can be detached. Workability of replacement and maintenance work can be greatly improved. According to the sixth aspect of the present invention, when the unitized calling roller and the separation belt are detached from the main body of the apparatus, the separation belt can be attached to and detached from the drive shaft. Workability can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of an automatic document feeder according to the present invention.

FIG. 2 is a diagram illustrating a state in which the automatic document feeder of one embodiment is released from an image reading device.

FIG. 3 is a main part configuration diagram of a sheet feeding / separating system of one embodiment.

FIG. 4 is a perspective view of a guide plate, a case having a call roller, a separation belt, and a drive shaft according to an embodiment.

FIG. 5 is a side view of the belt holder according to the embodiment.

FIG. 6 is a diagram illustrating a state where a case is removed from the drive shaft according to the embodiment;

FIG. 7 is a configuration diagram of a case, a calling roller, and a driving force transmitting member according to an embodiment.

FIG. 8 is a view showing a state in which only the separation rotating body has the drive shaft attached thereto after the case having the guide plate and the calling roller of the embodiment has been removed from the drive shaft.

[Explanation of symbols]

 2 Slit glass (reading position) 6 ADF (automatic document feeder) 9 Document table 10 Retrieval roller 11 Separation belt (separation rotating body) 12 Separation prevention roller (partner member) 15 Drive roller (separation rotation body) 15a Drive shaft 16 Followed roller (separated rotating body) 17 Case (call roller holder) 20 Spring (biasing member, separated rotating body) 25 Reverse path 51 Guide plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Imoto 1-3-6 Nakamagome, Ota-ku, Tokyo Stock inside Ricoh Company (72) Inventor Takashi Fujii 1-3-6 Nakamagome, Ota-ku, Tokyo Stock Inside Ricoh Company (72) Inventor Seiko Hashizume 1-3-6 Nakamagome, Ota-ku, Tokyo Stock Company Ricoh Company (72) Inventor Hirotaka Shimizu 1-3-6 Nakamagome, Ota-ku, Tokyo Stock Company Ricoh Company ( 72) Inventor Motoya Sano 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Company (72) Inventor Hitoshi Hattori 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Company

Claims (6)

[Claims] An original placing table on which a bundle of originals composed of a plurality of originals can be placed, a call roller for feeding a bundle of originals placed on the original placing table, and a sliding member provided on a mating member. The uppermost original is separated from the original bundle one by one by sandwiching the original bundle fed by the retrieving roller together with the mating member, and the original is moved toward the reading position through a reversing path for reversing the separated original. A separating rotary body for conveying, and a conveying path extending by a predetermined length in the conveying direction of the document and slidingly contacting the width direction of the document bundle fed by the recall roller to guide the document toward the reversing path. And a guide plate, wherein the separation rotating body and the guide plate are attached to a drive shaft, and a call roller is attached to the drive shaft via a drive force transmitting member, and the drive shaft is detachably attached to the main body of the apparatus. Characterized by Automatic document feeder. 2. The automatic document feeder according to claim 1, wherein said guide plate is detachable from a drive shaft. 3. The automatic document feeder according to claim 1, wherein said call roller is held by a call roller holder together with a driving force transmitting member, and said call roller holder is detachably attached to a drive shaft. . 4. A driving roller fixed to a driving shaft, a driven roller provided so as to be able to approach and separate from the driving roller, and the separation rotating member is stretched between the driven roller and the driving roller. A separation belt, and an urging member that applies tension to the separation belt by urging the driven roller in a direction away from the driving roller to move the driven roller close to or away from the driving roller side. 4. The automatic document feeder according to claim 3, wherein the separation belt is detachably attached to the drive shaft by applying or releasing the tension of the separation belt. 5. A document placing table on which a document bundle composed of a plurality of documents can be placed, a call roller for feeding the document bundle placed on the document placing table, and a sliding member capable of slidingly contacting a predetermined mating member. A document bundle fed by the retrieving roller is sandwiched together with a mating member to separate the topmost document one by one from the document bundle, and to the reading position through a reversing path for reversing the separated document. A separation rotating body that is transported toward the main body, wherein the separation rotating body is mounted on a drive shaft, and a call roller is mounted on the drive shaft via a driving force transmission member, and the drive shaft is detachable from the main body of the apparatus. An automatic document feeder, wherein the call roller is held by a call roller holder together with a driving force transmitting member, and the call roller holder is detachably attached to a drive shaft. 6. The separation rotating body is provided with a driving roller fixed to a driving shaft, a driven roller provided so as to be able to approach and separate from the driving roller, and stretched between the driven roller and the driving roller. A separation belt, and an urging member that applies tension to the separation belt by urging the driven roller in a direction away from the driving roller to drive the driven roller against the urging force of the urging member. By approaching or separating from the roller side,
6. The separation belt is detachably attached to a drive shaft by applying or releasing tension of the separation belt.
Automatic document feeder as described.