JP2003078682A - Image reader and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reader and an image forming device with excellent maintainability. SOLUTION: A drive pulley 510 is placed outside (outside in a horizontal direction) an enclosure 506c. Further, a stepping motor 513 serving as a drive source for delivering a driving force to the drive pulley 510 is also provided outside the enclosure 506c. Part of a first timing belt 509 being one of driving force delivery means is extracted to the outside of the enclosure 506c and stretched over the drive pulley 510. The driving force from the stepping motor 513 is delivered to the drive pulley 510 and the driving force is further delivered from the drive pulley 510 to the first timing belt 509. Thus, the power from the outside of the enclosure 506c is introduced into the inside of the enclosure 506c with a single timing belt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus for reading an image on a document and an image forming apparatus including the image reading apparatus.

[0002]

2. Description of the Related Art In an image reading apparatus (reduction optical system + wire drive) provided in a general copying machine, a wire, which is a power transmission means of variable shape, is wound around a long drive shaft so that the image reading means I am moving an optical mirror.

In the image reading apparatus disclosed in Japanese Unexamined Patent Publication No. 9-270895, a connecting portion between a timing belt, which is a shape-variable drive transmission means, and a stepping motor, which is a driving source, is provided in the image reading apparatus. It is provided in the housing.

[0004]

However, in the case of the above-mentioned prior art, the following problems have occurred.

In the structure of a general copying machine, the wire assembling process is complicated, and the cost of the shaft and drum for winding the wire is high. Further, since the wire tension is large, a drive motor with a large output must be used.

Further, in the case of the image reading apparatus disclosed in Japanese Patent Laid-Open No. 9-270895, it is necessary to open the glass serving as a document table when replacing the motor.

Further, the recording and discharging section as shown in FIG.
In the so-called "in-machine discharge" type copying machine provided in the height direction between the image reading section and the image forming section, the above-mentioned Japanese Patent Laid-Open No.
When the technology disclosed in Japanese Laid-Open Patent Publication No. 270895 is applied, the motor (513) protrudes into the discharge space,
It becomes inconvenient to take out the paper.

Further, as shown in FIG. 6, when a stepping motor 513 is provided in the recording paper conveying section, heat from the fixing section 15 heats a winding (not shown) inside the stepping motor 513. I will end up. This may cause a temperature rise that exceeds the insulation grade of the windings, so it is difficult to provide the stepping motor 513 inside the recording paper conveyance.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object thereof is to provide an image reading apparatus and an image forming apparatus which are excellent in maintainability.

[0010]

In order to achieve the above object, according to the present invention, there is provided a housing including a mounting table on which a document is mounted, a housing provided inside the housing, and mounted on the mounting table described above. In an image reading apparatus including a reading unit that scans and reads an image of a placed document, and a driving unit that moves and scans the reading unit, the driving unit is provided outside the housing. A driving source and at least a part of a driving force transmission path from the driving source to the reading means, and a part of the driving force transmission means having a variable shape, which is pulled out of a moving scanning range of the reading means. And are included.

The drive source may be provided outside the housing in the horizontal direction.

[0012] It is preferable that the drive source is configured to be attachable to and detachable from the main body of the apparatus with the drive force transmitting means installed.

A pulley is preferably provided for transmitting the driving force from the driving source and for transmitting the driving force to the driving force transmitting means.

The driving force transmitting means may be a timing belt.

The driving force transmitting means may be a geared wire.

The driving force transmitting means may be a wire.

In the image forming apparatus of the present invention,
An image reading apparatus according to claim 1;
An image forming unit that forms an image read by the image reading apparatus on a sheet.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, the dimensions of the components described in this embodiment,
Unless otherwise specified, the material, the shape, the relative arrangement, and the like are not intended to limit the scope of the present invention thereto.

(First Embodiment) An image reading apparatus and an image forming apparatus according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3, 8 and 9. First,
The image reading apparatus according to the first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a plan perspective view of an image reading apparatus according to the first embodiment of the present invention. FIG. 2 shows the first of the present invention.
3 is a cross-sectional view of the image reading device according to the embodiment of FIG.

Reference numeral 506c is a substantially rectangular parallelepiped casing forming the external appearance of the image reading apparatus main body.

Inside the housing 506c, two idler gears 519a and 519b, which are provided near both ends of the housing and relay the first timing belt 509, and a tensioner for applying tension to the first timing belt 509. And a pulley 520.

The tensioner pulley 520 is provided so as to be movable in a direction substantially parallel to the bisector of the angle θ formed by the bent portion of the belt. And this tensioner pulley 5
20 is biased by a spring 520a and gives tension to the first timing belt 509.

Further, a carriage 50 in which a contact type image sensor 506 as an image reading means is mounted in the housing.
7 is slidably provided on the guide shaft 508 via the bearing 522. The angle formed by the carriage 507 and the guide shaft 508 is 90 °.
By slidingly moving 07 on the guide shaft 508, an image is sub-scanned by the contact image sensor 506.

Idler gear 519a and idler gear 51
9b is provided so that the straight line connecting them is parallel to the guide shaft 508. The connecting portion 50 between the carriage 507 and the first timing belt 509 is provided between the idler gear 519a and the idler gear 519b.
7a is provided, and the carriage 507 is moved by the reciprocating movement of the first timing belt 509.

Further, the straight line connecting the idler gear 519a and the idler gear 519b and the straight line connecting the idler gear 519b and the drive pulley 510 are formed in a substantially L shape so as to be bent at about 90 °.

The drive pulley 510 is connected to the housing 506.
It is provided outside c (outside in the horizontal direction). Also,
A stepping motor 513 as a drive source that transmits a driving force to the drive pulley 510 is also provided outside the housing 506c (outside in the horizontal direction). Then, a part of the first timing belt 509, which is one of the driving force transmission means, is pulled out to the outside of the housing 506c (outside in the horizontal direction),
The drive pulley 510 is stretched.

In this way, the stepping motor 51
The driving force from 3 is transmitted to the driving pulley 510,
From the drive pulley 510 to the first timing belt 50
The driving force is transmitted to 9. Therefore, it is possible to guide the power from the outside of the housing 506c to the inside of the housing with one timing belt.

However, if the stepping motor 513 is disposed outside the housing 506c and the stepping motor 513 is not hindered from being attached or detached, the first timing belt 509 is pulled out (driving position). The position of the pulley 510) may be inside the housing 506c. However, in order not to hinder the moving scanning of the contact type image sensor 506 which is the reading means,
It is necessary to be outside the moving scanning range.

The contact image sensor 506 is connected to the image processing relay board 511 via a flexible flat cable 523. The image processing relay board 511 is connected to the main body controller 512.

The flexible flat cable 523 has a length such that it can follow and extend when the contact type image sensor 506 reciprocates, and performs the extension and extension operation at a position where it does not interfere with the first timing belt 509.

A drive pulley 510 for operating the first timing belt 509 is provided outside the housing 506c. The drive pulley 510 and the stepping motor 5
13 and the carriage 507 is reciprocated by the rotation of the stepping motor 513.

The stepping motor 513 has a housing 506.
As shown in FIG. 3, the motor support base 524 fixed to c is fixed as follows. FIG. 3 is a component exploded view of a drive unit that drives a reading unit in the image reading apparatus according to the first embodiment of the present invention.

(1) An anti-vibration damper 525 that suppresses vibration during motor rotation is fixed to the stepping motor 513 as a drive source with screws.

(2) A spring support base 527 for supporting the second spring 530 and the like is fixed to the vibration damper 525 with screws.

(3) The motor pinion 526 of the stepping motor 513 and the drive pulley 510 are connected by the second timing belt 528.

(4) The spring support base 527 and the motor support 524 are the motor pinion 526 and the drive pulley 510.
It is configured to be movable in a direction parallel to a straight line connecting with. A predetermined tension is applied to the second timing belt 528 by pulling the spring support base 527 with the second spring 530 having one end fixed to the apparatus body side. After mounting the second spring 530, the spring support base 527
And the motor support 524 are fixed with screws.

With such a configuration, the tension of the first timing belt 509 is controlled by the stepping motor 51.
It is possible to prevent it from being directly applied to 3. By providing the stepped drive pulley 510 having a different rotation speed ratio for each belt, the drive speed of the stepping motor 513 can be reduced, so that the second timing belt 528 is 1
The tension is smaller than that of the timing belt 509.

As a result, the stepping motor 513 can also reduce the load on the motor shaft and prevent the motor shaft from falling.

This point will be described in more detail.

If the first timing belt 509 is directly connected to the stepping motor 513 as shown in FIG. 7, the tension of the first timing belt 509 is directly applied to the motor shaft. To work. As a result, the motor shaft may be pulled, the vibration damper 525 may be deformed, and the motor shaft may fall down. On the other hand, as described above, in the embodiment of the present invention, the transmission of the driving force from the stepping motor 513 to the first timing belt 509 is transmitted via the second timing belt, so that the tilt of the motor shaft is prevented. I try not to occur.

In the present embodiment, the image reading unit 3 is covered with the outer covers 530a to 530d, and the stepping motor 513 can be replaced by removing the outer covers 530a to 530d at the rear of the apparatus main body 1. It is configured to be able to.

In this case, the first timing belt 509
Since it is not necessary to remove the stepping motor 513, it is very easy to replace the stepping motor 513. In addition, for example, the image reading unit 3
It is not necessary to remove the upper platen glass 501, and the number of maintenance steps can be reduced. In addition, there is no fear that dust or dirt may enter the inside of the housing during work.

As described above, in the case of the image reading apparatus according to this embodiment, the maintainability is extremely excellent.

In the above description, the motor pinion 5
Although the timing belt is used as the power transmission means between the drive gear 26 and the drive pulley 510, it may be connected by a gear.
Even in this case, the stepping motor 513 can be replaced without removing the first timing belt 509.

Further, the reading means for reading the image is not limited to the configuration described so far.
For example, it is possible to use an image reading unit in which a reduction optical system including a mirror, a light source, and a photoelectric conversion element is unitized in one housing. In this case, the first timing belt 509 causes the image reading means to reciprocate to sub-scan the original on the original platen glass.

Next, with reference to FIGS. 8 to 10, the overall configuration of the image forming apparatus (copying apparatus) according to the embodiment of the present invention will be described. FIG. 8 is a schematic sectional view of the image forming apparatus according to the embodiment of the present invention. FIG. 9 is an external perspective view of the image forming apparatus according to the embodiment of the present invention. 9A and 9B show appearances from different angles. FIG. 10 is a control block diagram of the image forming apparatus according to the embodiment of the present invention.

In the figure, 1 is a main body of the apparatus, 2 is a document transporting section for stacking a plurality of documents D and transporting them one by one, and 3 is an image reading section for reading the image information of the document D (corresponding to the image reading apparatus). ) 4 is a recording unit composed of a laser beam printer,
Reference numeral 5 is an operation unit including a display unit and input keys, 6 is a cassette paper feeding unit that stores a plurality of sheet materials S and conveys the sheets one by one, 7 is an MP (multi-paper) paper feeding unit, and 8 is The control unit 9 of the entire apparatus is a power source.

The image reading section 3 is provided on the upper part of the apparatus main body 1 as shown in the figure. The image reading unit 3 includes a recording housing (not shown) that supports the recording unit 4, and a main body control unit 51.
An electronic component housing (not shown) that supports the image reading unit 3 and the image reading unit 3
Is supported by a column 401 that supports the right front side of the.

A recording paper discharge unit 12 is provided below the image reading unit 3 and has a so-called in-machine paper discharge configuration. The recording and discharging unit 12 and the image reading unit 3 are separated by a reader bottom plate 516 provided in the image reading unit 3.

(Reader) On the upper surface of the image reading unit 3, a document table glass 501, a flow reading glass 502, and a jump table 503 are provided.

A document pressure plate 504 is provided above the image reading section 3.
A document conveying section 2 including the above is provided behind the image reading section 3 via a hinge (not shown).

In the image reading section 3, there are provided a contact image sensor 506, a carriage 507, a guide shaft 508, a timing belt 509, a drive pulley 510, and an image processing relay board 511 which are image reading means. As an option, a document size detection sensor 51
It is possible to arrange 2a.

The contact image sensor 506 includes a one-dimensional photoelectric conversion element (not shown) and SELFOC lens (trademark).
506a and light sources 506b on both sides of the SELFOC lens (trademark) 506a, and these are arranged in a single housing 506.
It is a device stored in c.

The contact-type image sensor 506 is elastically supported on the carriage 507 by a spring (not shown), and is biased toward the original platen glass 501, so that the original platen glass 501 is urged.
A constant distance is maintained so that the distance to the document D arranged above does not fall out of the depth of focus.

The carriage 507 is a stepping motor 5
First timing belt 509 driven by 13
Is connected to the one-dimensional photoelectric conversion element 506d in the contact image sensor 506 and is perpendicular to the guide shaft 50.
A reciprocating motion (scanning) is performed in the image reading unit 3 along the line 8.

The position of the contact image sensor 506 is controlled by the rotation frequency and rotation time of the motor with the detection timing of the home position sensor 514 as a base point.

When the document D is placed on the platen glass 501 and the document feeding section 2 provided with the document pressure plate 504 is closed, the document size detection sensor 512a detects the size of the document at a predetermined opening / closing angle. It

When the copy start key 601a is pressed, a recording paper of a predetermined size is selected according to the detected document size and the information of the scaling ratio input from the operation unit 5, and the sheet material S is fed. Be started. If there is no recording sheet of an appropriate size, the fact is displayed on the display unit 602.

After pressing the start key 601a, shading is performed, scanning is performed from the front end of the original, and A / D conversion is performed by the image processing relay board 511 provided in the image reading section 3,
It is sent to the image processing unit 52 of the apparatus body. The contact image sensor 506 and the image processing relay board 511 are electrically connected by a flat cable (not shown).

When the scanning is completed, the stepping motor 513
Rotates in the reverse direction to return the contact image sensor 506 to the original standby position.

(DF (Document Feeder)) The configuration and operation of the document feeder 2 are as follows. The original document table 21 is provided with a slider 21a which is slidable in a direction perpendicular to the conveyance direction of the original document D (width direction of the original document D), and both of the original documents D stacked on the original document table 21 are provided by the slider 21a. The sides can be aligned.

When the document D is loaded on the document loading table 21,
The presence of a document is detected by the document detection sensor 21b, and the size of the document is detected by the width detection sensor 21d, which detects the width based on the movement amount of the length detection sensor 21c and the slider 21a. Then, the size information is passed to the main body control unit 51 in the apparatus main body 1, and the recording paper of a predetermined size is selected according to the scaling factor input from the operation unit 5. If there is no recording sheet of an appropriate size, the fact is displayed on the display unit 602.

When the document detecting sensor 21b does not detect the document, the platen glass 501 on the stationary reading side is used.
When it is determined that the original is placed on the original, the contact image sensor 506 scans the original table glass 501 side.

When the start key 601a on the operation unit 5 is pressed, the contact type image sensor 506 performs shading, and the document table glass 50 is sandwiched by the jump table 503.
It moves to the lower side of the flow reading glass 502 on the side opposite to 1, and stands still.

On the other hand, a plurality of originals D stacked on the original placing table 21 are separated one by one by the separation pad 22a and the separation roller 22b pressed against the separation pad 22a, and the original conveyance roller 2
It is conveyed to the U-turn sheet passing path 22d by 2c.

Further, the document D is a document leading edge detection sensor 22f.
After passing through, the document D is conveyed to the first image reading unit 515 by the paper feed roller 22e or the like. The scanning of the document image is started at the timing when the leading edge of the document reaches the image reading position where the contact image sensor 506 is stopped. The image signal is A / D converted by the image processing relay board 511, and the converted signal is sent to the image processing unit 52 of the apparatus main body 1.

In the first image reading section 515, the image information of the document D is read while the document D is brought close to the scanning glass 502 by the document pressing roller 22g.

The original document D is scooped up from the upper surface of the scanning glass 502 by the jump table 503, and the original document discharge roller 22
After passing h, the document is discharged onto the document discharge tray 23.

When all the originals placed on the original loading table 21 have been read and the original detection sensor 21b detects "no original", the contact image sensor 506 returns to the original standby position.

(Image forming section) Recording section 4 (Image forming section)
Is composed of an image forming unit and a fixing device.

The image forming unit comprises a laser scanner 701, a toner-integrated process cartridge 702, and a transfer roller 703. Inside the process cartridge 702 are a photosensitive drum 702a, a charging roller 702b, and a developing sleeve 7.
02c, a cleaning blade 702d, a toner hopper 702e, and a cartridge housing 702f. The process cartridge 702 can be attached to and detached from the main body in the leftward direction in the drawing.

The laser scanner 701 includes a laser beam oscillator 701a, a polygon mirror 701b, and a folding mirror 701c.
The modulation signal is emitted from 01a, and the polygon mirror 701b
The photosensitive drum 702a is irradiated with the scanning light by the reflection mirror 701c and reflected by the folding mirror 701c.

(CRG (Cartridge)) The photosensitive drum 702a includes a charging roller 702b and a developing sleeve 702.
c, the cleaning blade 702d and the cleaning blade 702d are integrally incorporated in the recording cartridge 702. The recording cartridge 702 is attachable to and detachable from the apparatus main body 1. The surface of the photoconductor drum 702a is uniformly charged by the charging roller 702b, a latent image is formed by irradiating the surface with scanning light from the laser beam oscillator 701a, and the latent image is supplied from the developing sleeve 702c. It is made visible by toner.

(Fixing) A thermal fixing device 704 and a first paper discharging roller 451 are arranged in the sheet conveying path on the downstream side of the image forming section.

The heat fixing device 704 includes a heat fixing roller 704.
a, a pressure roller 704b, a pressure spring (not shown) for urging the pressure roller 704b toward the heat fixing roller 704a, and a fixing release lever 70 for releasing the urging pressure of both rollers.
4c, and a fixing frame 704d that supports them. A heater 704e is provided inside the heat fixing roller 704a.
Is provided, and a temperature detection sensor (not shown) is provided in contact with the surface of the heat fixing roller 704a.

When the registration roller pair 210 is driven at a predetermined timing based on the signal from the registration sensor 209, the registration roller pair 210 conveys the sheet material S to the image forming section. The predetermined timing means the photosensitive drum 7
The timing is such that the leading edge of the toner image formed on 02a coincides with the leading edge of the sheet material S.

After the toner image formed on the surface of the photosensitive drum 702a is transferred by the transfer roller 703, the sheet material S is conveyed along the sheet conveying portion 705, and the toner image is fixed by the thermal fixing device 704. Then, the sheet is ejected to the first sheet ejection tray 452 by the first sheet ejection roller 451.

(Discharge) The sheet material S after fixing is discharged to the first discharge tray 452 by the first discharge roller 451 composed of three rollers while the recording image surface is turned down by the first reverse path 454. To be done. The three first paper discharge rollers 451 are provided one outside the first reversing path 454 and two inside the first reversing path 454. The two inner rollers are biased by the outer one roller, respectively. . The sheet material S is subjected to reverse curl correction along the outer circumference of the outer roller.

When a large amount of sheet materials S are stacked on the first paper discharge tray 452 and detected by the first full load detection sensor 455, the full load is displayed on the operation unit 5 and the recording operation is stopped.

A second paper discharge tray 457 may be optionally provided above the first paper discharge tray 452.

The sheet material S after fixing is placed on the second sheet discharge tray 4
When the sheet material S is discharged to 57, the sheet flap S 456 changes the conveying direction of the sheet material S, and the sheet material S is discharged to the second sheet discharge tray via the second reversing path 458 and the second sheet discharge roller 459. The second paper discharge roller 459 and the second full load detection sensor have the same configurations as the first paper discharge roller 451 and the first full load detection sensor 455, respectively.

When the second paper ejection tray 457 is attached, when the first paper ejection tray 452 becomes full, the recording operation is not stopped and the sheet material is placed on the second paper ejection tray 457. It is also possible to discharge S.

In addition to the copy function, this apparatus has a facsimile transmission / reception function and a network print function, and the first paper ejection tray 452 and the second paper ejection tray 45 are provided.
7 can be selectively switched.

(Control System) FIG. 10 is a block diagram of the main body control unit 51 of the copying machine using the LBP in this embodiment. In the figure, 53 is a CPU that controls the entire copying machine.
Is. The CPU 53 includes an MPU 53a, a ROM 53b that stores control programs for the MPU 53a, a RAM 53b that is used as a work area for various data processing and a temporary storage unit for image information, an image processing unit 52 that performs image scaling, resolution conversion, and the like. It is composed by.

Further, the CPU 53 is provided with a calendar and a clock function having a known structure, and the RAM 53.
An area for storing important system setting information such as one-touch key destination information and software switch information in c is protected from an accidental failure such as a power failure by a battery backup.

The operation unit 5 shown in FIG.
c, function key 601d, one-touch key 60
1e, start key 601a, stop key 601b,
And various key switches such as an energy saver key 601f.

As shown in FIG. 10, the image reading unit 3 includes a reading drive control unit 54 such as a reading motor, a reading sensor 55 for reading an image, shading of the read image, binarization, edge enhancement, and the like. An image processing unit 52 for performing smoothing and the like, various sensors 56 for detecting a document, and the like are provided.

The recording section 4 includes a recording drive control section 57 such as a recording motor, a recording unit 58 for controlling a laser scanner and an electrophotographic process, an image processing section 64 for smoothing an image to be recorded, and recording. Various sensors 62 for detecting paper and the like are provided.

The control system when this device functions as a facsimile machine is composed of the following. The communication control unit 63 for making a call, receiving a call, encoding image data, etc.
It has a connecting part 59 made of DEM, NCU, etc.
A communication network 59a and a handset 59b are connected to 9.

The external interface 60 is an interface for directly transmitting and receiving data from the CPU 53, and is, for example, RS232C, SCSI, LAN, USB, IEEE1.
394, by connecting to a computer or peripheral equipment outside the apparatus through a line such as infrared rays, the apparatus can be used as a scanner printer of the external computer or can function as a host for the external peripheral equipment.

The HDD 61 is used as a large capacity nonvolatile memory for storing image information and the like.

(Second Embodiment) FIG. 4 shows a second embodiment of the present invention. In the first embodiment described above, the configuration in the case of the timing belt is shown as the driving force transmission means that is partially pulled out of the moving scanning range, but in the present embodiment, the configuration in the case of the geared wire will be described. To do.

The other structure and operation are the same as those of the first embodiment, and therefore the description thereof is omitted.

FIG. 4 is a perspective perspective view of an image reading apparatus according to the second embodiment of the present invention.

In this embodiment, the geared wire 583 is used to drive the carriage 507. With this configuration, since the rotation axis of the stepping motor 513 can be horizontal, the stepping motor 513 can be used sideways. Therefore, there is an advantage that the stepping motor 513 does not project below the image reading unit 3.

Further, since the geared wire generally does not require tension as much as the timing belt, it is not necessary to use the tensioner pulley and the load torque is small, so that the output is smaller than that of the device using the timing belt. There is a merit that a motor can be used.

(Third Embodiment) FIG. 5 shows a third embodiment of the present invention. In the above-described first embodiment, the case where the one L-shaped drive transmission path is configured by using one timing belt has been described, but in the present embodiment, the substantially L-shaped drive transmission path is formed by using two timing belts. The case of configuring the drive transmission path of is shown.

The other structure and operation are the same as those of the first embodiment, and therefore the description thereof is omitted.

FIG. 5 is a plan perspective view of an image reading apparatus according to the third embodiment of the present invention.

In this embodiment, the two timing belts 584a and 584b are connected to each other by a relay pulley 584c provided inside the housing of the image reading apparatus so that power can be transmitted. As a result, the first timing belt 584a is arranged parallel to the moving direction of the image reading unit to connect the image reading unit, and the third timing belt 584b transmits the power between the relay pulley and the drive pulley 510 outside the housing. Connected as possible.

The drive pulley 510 is connected to a stepping motor 513, which is a power source, and a second timing belt 528 so that power can be transmitted.

By using a stepped pulley as the relay pulley 584c, it is possible to obtain a large reduction ratio as compared with the structure in which the drive source and the image reading means are connected by one timing belt.

(Others) As the driving force transmitting means described above, the timing belt and the geared wire are shown, but the invention is not limited to these.

The point is that any endless member having a function of transmitting driving force and rotating can be applied. Therefore, for example, a general wire or chain can be applied.

[0106]

As described above, according to the present invention, since the drive source is provided outside the housing, the drive source can be attached / detached while the housing remains as it is, and the maintainability is improved. Excellent in.

With the driving force transmitting means installed,
Since the drive source is configured to be attachable / detachable to / from the apparatus body, the drive source can be easily attached / detached.
Excellent maintainability.

While the driving force from the driving source is transmitted,
By providing the pulley for transferring the driving force to the driving force transmitting means, it is possible to prevent the tension from the driving force transmitting means from being directly applied to the driving source.

[Brief description of drawings]

FIG. 1 is a plan perspective view of an image reading apparatus according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the image reading apparatus according to the first embodiment of the present invention.

FIG. 3 is a component development view of a drive unit that drives a reading unit in the image reading apparatus according to the first embodiment of the present invention.

FIG. 4 is a perspective perspective view of an image reading apparatus according to a second embodiment of the present invention.

FIG. 5 is a plan perspective view of an image reading apparatus according to a third embodiment of the present invention.

FIG. 6 is a virtual diagram for considering a mounting position of a drive source in an in-machine sheet discharging type image forming apparatus.

FIG. 7 is a virtual diagram for considering the mounting position of the timing belt.

FIG. 8 is a schematic cross-sectional view of the image forming apparatus according to the exemplary embodiment of the present invention.

FIG. 9 is an external perspective view of the image forming apparatus according to the exemplary embodiment of the present invention.

FIG. 10 is a control block diagram of the image forming apparatus according to the embodiment of the present invention.

[Explanation of symbols] 1 device body 2 Document feeder 3 Image reading section 4 recording section 5 Operation part 501 platen glass 502 Flowing reading glass 503 jump stand 504 Original pressure plate 506 Contact image sensor 506c housing 507 carriage 508 guide shaft 509 Timing Belt 510 drive pulley 511 Image processing relay board 513 stepping motor 514 Home Position Sensor 515 image reading unit 519a, 519b idler gear 520 Tensioner pulley 523 flexible flat cable 524 motor support 525 Anti-vibration damper 526 Motor Pinion 527 spring support base 528 Timing Belt 583 geared wire 584a, 584b Timing belt 584c Relay pulley

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 1/10 H04N 1/10 1/107 F term (reference) 2H071 CA01 CA05 DA02 DA26 DA27 EA04 2H108 AA01 DA01 FB16 FB62 FB66 FB75 HA01 5B047 AA01 BA02 BB02 BC14 BC30 5C062 AA05 AB17 AC02 AD06 BA00 5C072 AA01 BA20 EA07 LA20 MA01 XA01

Claims (8)

[Claims] 1. A housing including a mounting table on which a document is mounted, a reading unit which is provided inside the housing, and which scans and reads an image of the document mounted on the mounting table, and the reading unit. An image reading apparatus including a drive unit for moving and scanning the drive unit, wherein the drive unit includes a drive source provided outside the housing, and a drive force transmission path from the drive source to the reading unit. An image reading apparatus, comprising at least a part of the driving part, and a part of which is pulled out of a moving scanning range of the reading part, the driving force transmitting part having a variable shape. 2. The image reading apparatus according to claim 1, wherein the drive source is provided outside the housing in the horizontal direction. 3. The image reading apparatus according to claim 1, wherein the drive source is configured to be attachable to and detachable from the main body of the apparatus with the drive force transmitting means installed. . 4. The image according to claim 1, further comprising a pulley for transmitting the driving force from the driving source and for transmitting the driving force to the driving force transmitting means. Reader. 5. The image reading apparatus according to claim 1, wherein the driving force transmitting means is a timing belt. 6. The image reading device according to claim 1, wherein the driving force transmitting means is a geared wire. 7. The image reading device according to claim 1, wherein the driving force transmitting means is a wire. 8. An image, comprising: the image reading device according to claim 1; and an image forming unit that forms an image read by the image reading device on a sheet. Forming equipment.