JPH10257264A - Picture reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which does not require skill and in which jamming does not occur even if the external form of an original is unstable by sandwiching the original by means of an original mount and a transparent board so that it can freely be opened/closed and moving a read unit on the transparent board by means of regulating the direction with a guide rail. SOLUTION: The original mount 2 is secured to the transparent board 4 so that it is freely opened/closed through a hinge part 3. The original 1 is inserted between the original stand 2 and the transparent board 4 by making a surface being the object of reading face the transparent board 4. Knobs 25 are provided on both sides of the transparent board 4 and contact between the transparent board 4 and the original 1 and the original stand can be improved by depressing the knobs 25 from the above by a user if needed. The read unit 5 is loaded on the transparent board 4 and the guide rail 6 is provided on the read unit 5. A cable 15 is laid on the groove part 6a of the guide rail 6. The posture of the read unit 5 and a moving direction in an auxiliary scanning direction are regulated by the guide rail 6.

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 equipped with a sheet feeder, and more particularly to a technique of a switching mechanism for removing an original having a shape other than a sheet by removing a reading unit.

[0002]

2. Description of the Related Art In an image reading apparatus that optically reads an image written on a document such as a paper and converts the image into an electric signal, a mechanism in which a reading unit scans a document surface to read an image is roughly classified into the following. There is something to show.

An image reading apparatus with a sheet feeder of a type in which a sheet-shaped document is taken in, conveyed inside the apparatus, sequentially read at a reading position, and the document is discharged after reading.

A surface of a document such as a sheet to be read is placed in close contact with a transparent plate, and a reading unit provided at a position opposed to the original via the transparent plate is moved to scan. Type document reading type image reading device.

A handy type image reading apparatus in which a reading section is miniaturized and a document to be read is moved and scanned over a document to be read.

[0006] Of the mechanisms described above, the image reading apparatus with a sheet feeder shown in [1] has a format suitable for continuous processing by sequentially reading a large number of documents.
Further, the size of the device itself can be reduced.
However, due to the characteristics of the sheet feeder, the original to be read is limited to a sheet-like original, and the size such as the thickness or the width of the original is limited by the allowable amount of the sheet feeder. .

In the above-described original-mounting type image reading apparatus, even a thick original can be stably read. However, in order to continuously read the above-mentioned original, an automatic original is required separately. It is necessary to add a feed mechanism, and furthermore, since the reading unit is moved inside the device, a device size that matches the size of the document to be placed is required,
The miniaturization of the device itself cannot be expected.

In the handy type image reading device described above, the size of the device itself can be reduced, the size of the document to be read is not limited, and only the necessary portions can be read. , It becomes difficult to keep the scanning direction and speed constant, which causes a deterioration in image quality.

Further, by combining the above-mentioned mechanism, for example, an image reading apparatus with a sheet feeder as shown in FIG. 1 has a built-in reading section which can be detached, and when necessary, a handy type image reading apparatus as shown in FIG. There is a method used as a device.

Here, the definitions of the following terms according to the present invention will be described to clarify the concepts included therein.

The main scanning direction refers to the direction of a linear area read by an image reading element juxtaposed to a reading section of the image reading apparatus.

The sub-scanning direction indicates a direction perpendicular to the main scanning direction in which reading is performed by moving a reading unit of the image reading apparatus. Therefore, the image reading by the image reading device is constituted by a rectangular area formed by reading in the main scanning direction and reading in the sub-scanning direction.

Therefore, an accurate image without distortion can be obtained by accurately setting the sub-operation direction in a direction perpendicular to the main scanning direction and in a straight line.

An embodiment of an image reading apparatus according to the prior art will be described with reference to FIGS.

FIG. 13A schematically shows an image reading apparatus with a sheet feeder. Sheet feeder unit 5
A reading unit 53 is mounted on 2. The sheet feeder unit 52 and the reading unit 5
Since the cable 54 for electrically connecting the cable 3 has a necessary length when the reading unit 53 is detached and used as a handy type, the cable 54 is bundled when attached to the sheet feeder unit 52. Stored in the device.

The document 51 is carried in by the sheet feeder unit 52, and after the reading unit 53 reads the document 51, the document 51 is discharged.

FIG. 13B shows a state in which the reading unit 53 is detached and used as a handy type image reading apparatus of the type in which the original 51 is moved on the original 51 and scanned by manual operation. The reading unit 53
Is connected to a control unit built in the sheet feeder unit 52 by a cable 54.

FIG. 14 shows a state in which a guide plate 55 is used when the reading unit 53 is moved over the document 51 by manual operation and scanned.

A guide plate 55 placed on the document 51 regulates the direction of scanning for reading by the reading unit 53. The document is manually moved on the document 51 while being in contact with the side surface of the reading unit 53. It moves on 51 and scans.

The guide plate 55 regulates the sub-scanning direction with a straight line portion perpendicular to the main scanning direction of the reading unit 53, thereby using the image reading device as a handy type image reading device. In this case, the reading operation can be performed without causing distortion of the image.

The guide plate 55 is provided with a rail portion that meshes with the reading unit 53, so that the sub-scanning direction can be maintained at a right angle to the main scanning direction and the linearity in the sub-scanning direction can be maintained.

[0022]

As described above, the conventional image reading apparatus has the following problems.

In an image reading apparatus using a single mechanism, the form of a document to be read is limited, and only an original having a form suitable for the mechanism adopted by the apparatus can be read.

For example, when a mechanism that can be used as a handy-type image reading device is combined with a detachable reading unit of an image reading device with a sheet feeder, the range of the form of a document to be read can be expanded. In the handy type image reading method described above, a guide plate for performing the setting in the sub-scanning direction is required.

The guide plate for performing the setting in the sub-scanning direction causes distortion of the image unless the contact with the reading unit is securely maintained. Requires a certain level of skill.

Also, the guide plate is provided with a rail portion that meshes with the reading unit to maintain the sub-scanning direction at right angles to the main scanning direction and to maintain the linearity in the sub-scanning direction to reduce image distortion. It is possible to avoid. However, it is the portion that contacts the guide plate that regulates the sub-scanning direction of the reading unit. Usually, the operator touches the guide plate at the right or left end of the reading unit. It is in a position far from your hand. Therefore, the operator tends to be twisted during the operation, and the operator is required to have a certain level of skill even in the handy type reading method using the guide plate.

Further, in the case of reading an original placed on a flat table by the above-mentioned handy type image reading method, if the outer shape of the original to be read is irregular, the end of the original is read. The scanning may be hindered by being caught in the unit.

[0028]

In order to solve the above problems, the present invention employs the following means.

1) The document is sandwiched between a document table on which a document to be read is placed and a transparent plate which is openably and closably engaged with the document table. Further, the reading unit moves on the transparent plate.

By taking this means, the original is fixed by the original platen and the transparent plate, and the surface to be read of the original is read by the reading unit of the reading unit facing the original via the transparent plate. Get.

2) A guide rail is provided at the upper center of the transparent plate along the sub-scanning direction of the reading unit.

By taking this means, an effect is obtained that the guide rail regulates the attitude of the reading unit and the sub-scanning direction.

3) The signal cable connected to the reading unit is connected at the center of the reading unit.
Alternatively, the image signal may be led out from the reading unit without using a cable by infrared communication or the like.

By taking this means, the reading unit has an effect of maintaining a right-left balance when moving in the sub-scanning direction.

4) The reading unit is moved in the sub-scanning direction by a driving roller provided in the reading unit. Alternatively, a combination of a pinion provided above the reading unit and a rack provided on the guide rail may be used.

By taking this measure, the reading unit has the effect of running on the transparent plate in the sub-scanning direction.

5) The left and right ends of the transparent plate are provided with handles for pressing downward.

By adopting this means, the transparent plate can be pressed down by hand when necessary, so that the transparent plate is brought into close contact with the document.

6) The transparent plate, which is openably and closably locked to the platen, has a mechanism for moving its rotation fulcrum, and further has a mechanism detachable from the platen.

By taking this measure, the transparent plate has an effect of maintaining a posture in close contact with the original according to the situation of the original placed below.

7) The restraining state of the reading unit is released by opening and closing the locking mechanism between the guide rail and the document table as needed.

By taking this means, the image reading apparatus has an effect that the reading unit is mounted on the sheet feeder unit when necessary.

[0043]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention takes the following forms.

1) The reading unit of the image reading apparatus with a sheet feeder can be detached.

The reading unit, which is removed when necessary, is placed on a transparent plate. The transparent plate has a platen underneath, and the document is sandwiched between the transparent plate and the platen.

A guide rail for regulating the movement of the reading unit in the sub-scanning direction is provided at the center of the upper part of the transparent plate, and the reading unit mounted on the transparent plate is sandwiched by the guide rail.

Further, the upper portion of the reading unit is provided with two reference rollers that come into contact with the guide rail from the side, and the guide rail is provided with an auxiliary roller provided at a position opposed to the guide rail. Press against the reference roller.

The guide rail has a substantially H-shaped cross section to increase its section modulus and to resist bending due to external force.

By adopting this form, the reading unit detached from the image reading apparatus with the sheet feeder when necessary moves on the transparent plate in the sub-scanning direction along the guide rail. .

2) A rack is provided in the sub-scanning direction at a position facing the reading unit of the guide rail, and a pinion is provided above the reading unit so as to face the rack. Is rotated to cause the reading unit to move in the sub-scanning direction.

The reading unit has means for pressing the guide rail from below, and the reading unit presses the transparent plate from above by the reaction force.

Alternatively, the reading unit may be moved in the sub-scanning direction by a driving roller provided in the reading unit.

By taking this form, the reading unit mounted on the transparent plate runs in the sub-scanning direction on the transparent plate, and the reading unit of the document sandwiched between the transparent plate and the document table is moved. The effect of reading the surface to be read is obtained.

3) A cable is laid on the upper part of the guide rail and connected to a connector protruding from the reading unit. Further, a part of the cable is not fixed, and the leading end of the cable moves with the movement of the reading unit.

The connector protruding from the reading unit is locked by a cover part covering a part of the reading unit, and the connector is exposed only when necessary.

Alternatively, the reading unit has a power supply battery required for driving, and further includes a transceiver for infrared communication, and a receiver at a position facing the transceiver on the transparent plate, and a cable. Necessary image signals may be exchanged instead.

By taking this form, an effect is obtained that the image signal read by the reading unit is guided to a control unit built in the sheet feeder unit.

4) A frame is drawn on the document table which is freely opened and closed on the transparent plate, and is used as a reference for positioning the document placement.

By taking this form, an effect is obtained that the original is fixed at a predetermined position.

5) The hinge for locking the document table to the transparent plate so as to be openable and closable has means for moving the rotation axis thereof, and the hinge is a disassemblable mechanism.

On the left and right sides of the transparent plate, there are provided folding handles which are pulled out when necessary and receive downward pressing force.

By taking this form, the transparent plate adjusts the gap with the platen according to the thickness of the document, and if necessary, removes the platen to take a form corresponding to a document of a larger size. Further, there is obtained an effect that a mode is applied in which a pressing force is applied from above to bring the transparent plate into close contact with the document.

6) The guide rail is locked to the transparent plate by the hinge portion and the lock portion, and allows the reading unit to be mounted and released.

After the reading unit is released, the transparent plate has a mechanism for rotating and folding the guide rail.

By taking this form, when the above-mentioned transparent plate is not used, there is obtained an effect that the projection is eliminated and stored.

7) The reading unit has a connector which is directly connected to an opposing sheet feeder to make an electrical connection.

Further, the reading unit has a connector for connecting a cable when applied as a handy type device.

By taking this form, the image reading apparatus has an effect of changing its posture in accordance with the form of the document to be read.

[0069]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 1, the document table 2 is
The original 1 is sandwiched between the original platen 2 and the transparent plate 4 with the surface to be read facing the transparent plate 4.

Handles 25 are provided on both sides of the transparent plate 4, and when necessary, an operator presses the handle 25 from above to thereby make the transparent plate 4, the document 1, and the document table 2
Can be increased.

The reading unit 5 is placed on the transparent plate 4.
And a guide rail 6 is set on the reading unit 5. The guide rail 6 has a substantially H-shaped cross section (see FIG. 2), and a cable 15 is laid in the groove 6a.

The reading unit 5 can move on the transparent plate 4 along the guide rail 6. The orientation of the reading unit 5 and the direction of movement in the sub-scanning direction are regulated by the guide rail 6.

The connector 16 provided at the end of the cable led out from the reading unit 5 is located above the guide rail 6 and is connected to the cable 15. Note that the connector 16 and the fixing member thereof are maintained at positions where they do not come into contact with the guide rail 6.

The cable 15 is not fixed to the guide rail in the vicinity of the connection portion with the connector 16, and the folding point of the cable 15 is changed with the movement of the reading unit 6. Accompanying the movement of the reading unit 6 while moving.

As shown in FIG. 2, two reference rollers 7a provided in the reading unit 5 come into contact with the guide rail 6,
Further, an auxiliary roller 7b disposed at an opposing position presses the guide rail 6, and presses the guide rail 6 against the reference roller 7a. The auxiliary roller 7b is disposed inside the space between the two reference rollers 7a.

Therefore, since the two reference rollers 7a always generate the necessary pressing force against the guide rail 6 by the pressing force of the auxiliary roller 7b, the reading unit 5 moves on the guide rail 6 when moving. On the other hand, the posture can always be kept constant.

Further, 2 provided in the reading unit 5
The set of sliders 10 presses the guide rail 6 from below by a pressing spring 11, and the reading unit 5 is pressed against the transparent plate 4 by the reaction force.

The pressing mechanism using the slider 10 and the pressing spring 11 replaces the sliding friction with the rolling friction by using a roller instead of the slider 10 to reduce the frictional resistance when the reading unit 5 moves. And lighter movement can be realized.

A cover 17 having a hinge mechanism is provided in the middle of the reading unit 5, and a connector 16 is fixed to a tip of the cover 17. When the cover 17 is closed, the connector 16 is hidden inside the reading unit 5. When the cover 17 is opened, the connector 16 is located above the cable 15 laid in the groove 6 a of the guide rail 6. And the cable 15
Connected to

The cover 17 and the connector 16 do not come into contact with the guide rail 6 and the reading unit 5
The cable 15 also moves while maintaining the initially set distance, and the cable 15 accompanies the movement of the reading unit 6 while moving its turning point.

Further, as shown in FIG. 2, the guide rail 6 has a rack 8 and meshes with a pinion 9 provided in the reading unit 5. A drive mechanism (not shown) incorporated in the reading unit 5 rotates the pinion 9 to move the reading unit 5 in the sub-scanning direction. FIG. 12 shows an application example in which the rack 8 is laid on the side surface of the guide 6.

Alternatively, as shown in FIG.
(Not shown) on the reading unit 5 of the reading unit 5
The driving roller 5a provided on the same surface as b is rotationally driven,
The reading unit 5 is moved in the sub-scanning direction.

An embodiment of another connection instead of the connection by the cable 15 and the connector 16 shown in FIGS. 1 and 2 will be described with reference to FIG.

A transceiver 21 is provided on the transparent plate 4, and a transceiver 20 is provided in the reading unit 5 at a position facing the transceiver 21. Between the transceiver 20 and the transceiver 21, for example, an infrared communication system is configured.

The reading unit 5 performs reading and movement in the sub-scanning direction by a built-in power supply battery unit (not shown), and the read image data is transmitted from the transmission receiver 20. The image data received by the transceiver 21 is sent to a control unit (not shown).

As shown in FIG. 5, a frame 22 is provided on the document table 2. When the original 1 (not shown) is placed on the platen 2 by opening the transparent plate 4 (not shown), the original 1 is placed in accordance with the area indicated by the frame line 22. By setting the position, the reading start position and the readable area can be confirmed in advance.

FIG. 6 shows details of the hinge portion 3 shown in FIG. The protruding hinge 3a provided on the platen 2 is a transparent plate 4
Is inserted into the hole 3c provided in the transparent plate 4 and is sandwiched by the projecting hinges 3b provided in the transparent plate 4.

The projection 3d provided on the hinge 3b enters a groove 3e provided at the center of the hinge 3b, and the transparent plate 4 opens and closes using the projection 3d as a rotation axis.

Since the projection 3d slides in the groove 3e of the hinge 3a, the relative position of the transparent plate 4 on the document table 2 moves in the groove 3e. Therefore, the transparent plate 4 moves according to the thickness of the document 1 placed on the document table 2.

Since the connection between the document table 2 and the transparent plate 4 is maintained by the projections 3d and the grooves 3e, the connection can be easily released. Thus, the document table 2 can be detached from the transparent plate 4 when necessary.

The details of the handle 25 shown in FIG. 1 are shown in FIG. As shown in FIG. 7A, a hinge 25a is attached to the transparent plate 4.
By pressing the handle 25 rotatably locked from above by above, the document 1 sandwiched between the transparent plate 4 and the document table 2 can be more closely adhered to the transparent plate 4.

When the transparent plate 4 and the document table 2 are stored in appropriate places, as shown in FIG. 7 (b), the handle 25 is tilted around the hinge 25a as a rotation axis to eliminate the protrusion at the time of storage. This reduces the storage space and at the same time protects the handle during storage.

As shown in FIGS. 8 and 9, when the lock portion 28 provided on the transparent plate 4 is unlocked, the guide rail 6 rotates about the hinge portion 27 as a rotation axis and opens.
The constraint of the reading unit 5 on the transparent plate 4 is released.

The reading unit 5 from which the restraint has been released is removed from the transparent plate 4, and the guide rail fixed again by the lock portion 28 is connected to the hinge portion 27 and the lock portion 2.
8, the rotation unit is rotated about a rotation fulcrum 29 provided as a rotation axis, thereby lowering the height of the entire unit including the document table 2, the transparent plate 4, and the guide rail 6 and reducing the number of protrusions. To take a form suitable for storage.

As shown in FIG. 10, the reading unit 4 has a connector 33 at its end,
Is connected to the cable 34 output from the control unit built in the controller.

Since the connector 33 is located at the end of the reading unit 4, the cable 34 is used even when the reading unit 4 is held by hand and used as a manually operated hand-held image reading apparatus. Can be performed smoothly without disturbing the operation.

As shown in FIG. 11, the reading unit 5 has a connector 32 on its reading surface, and a connector 31 which engages with the connector 32 is provided at a position facing the connector 32 in the feeder unit 30.

Therefore, when the reading unit 5 is mounted on the feeder unit 30, the mounting can be performed without being conscious of the connection by the cable or the like.

[0100]

According to the present invention, the following effects can be expected.

1) The reading unit of the image reading apparatus with a sheet feeder can be detached.

The reading unit, which is removed when necessary, is placed on a transparent plate. The transparent plate has a platen underneath, and the document is sandwiched between the transparent plate and the platen.

A guide rail for regulating the movement of the reading unit in the sub-scanning direction is provided at the center of the upper part of the transparent plate, and the reading unit mounted on the transparent plate is sandwiched by the guide rail.

Further, the upper portion of the reading unit is provided with two reference rollers that come into contact with the guide rail from the side, and the guide rail is held by an auxiliary roller provided at a position opposed to the guide rail. Press against the reference roller.

The guide rail has a substantially H-shaped cross section to increase its section modulus and to resist bending due to external force.

By taking this means, the reading unit detached from the image reading device with the sheet feeder when necessary moves in the sub-scanning direction along the guide rail on the transparent plate, and the original mounting type The advantage is that it can be used as an image reading device.

Further, since the reading unit moves on the transparent plate by this means, the reading unit does not fluctuate due to the folding of the original or the step of the original, so that the reading is stable. An effect of obtaining an image can be obtained.

2) A rack is provided in the sub-scanning direction at a position facing the reading unit of the guide rail, and a pinion is provided above the reading unit so as to face the rack. Is rotated to cause the reading unit to move in the sub-scanning direction.

The reading unit has means for pressing the guide rail from below, and the reading unit presses the transparent plate from above by the reaction force.

Alternatively, the reading unit may be moved in the sub-scanning direction by a driving roller provided in the reading unit.

By taking this means, the reading unit placed on the transparent plate runs on the transparent plate in the sub-scanning direction, and the reading unit of the document sandwiched between the transparent plate and the document table is moved. An effect is obtained in that the surface to be read is automatically read, and the surface can be used as a document mounting type image reading device.

3) A cable is laid on the upper part of the guide rail and connected to a connector protruding from the reading unit. Further, a part of the cable is not fixed, and the leading end of the cable moves with the movement of the reading unit.

The connector protruding from the reading unit is locked by a cover part covering a part of the reading unit, and the connector is exposed only when necessary.

Alternatively, the reading unit has a power supply battery required for driving, and further includes a transceiver for infrared communication, and a transmission transceiver at a position facing the transceiver on a transparent plate, and a cable. Necessary image signals may be exchanged regardless of the above.

By adopting this means, an effect is obtained that the image signal read by the reading unit is guided to a control unit built in the sheet feeder unit.

4) A frame line is described on the document table which is openably and closably locked to the transparent plate, and is used as a reference for positioning the document placement.

By taking this means, an effect is obtained that the original is fixed at a predetermined position.

5) The hinge for locking the original plate to the transparent plate so as to be openable and closable has means for moving its rotation axis, and the hinge is a disassemblable mechanism.

On the left and right sides of the transparent plate, there are provided folding handles which are pulled out when necessary and receive a downward pressing force.

By taking this measure, the transparent plate adjusts the gap with the platen in accordance with the thickness of the document, and removes the platen when necessary to take a form corresponding to a document of a larger size. Further, there is obtained an effect that a mode in which a pressing force is applied from above to bring the transparent plate into close contact with the document.

6) The guide rail is locked to the transparent plate by the hinge portion and the lock portion, and the reading unit is mounted and released.

Further, after the mounting of the reading unit is released, the transparent plate has a mechanism for rotating and folding the guide rail.

By taking this measure, there is obtained an effect that when the transparent plate is not used, the transparent plate is stored without the projection.

7) The reading unit has a connector which is directly connected to an opposite sheet feeder to make an electrical connection.

Further, the reading unit has a connector for connecting a cable when applied as a handy type device.

By adopting this means, the image reading apparatus can effectively cope with various types of originals, based on a sheet feeder type, effectively having both functions as an original mounting type and a handy type image reading apparatus. Get the effect.

[Brief description of the drawings]

FIG. 1 is an explanatory view (1) showing an embodiment of the present invention.

FIG. 2 is an explanatory view (2) showing an embodiment of the present invention.

FIG. 3 is an explanatory view (3) showing an embodiment of the present invention.

FIG. 4 is an explanatory view (4) showing an embodiment of the present invention.

FIG. 5 is an explanatory view (5) showing an embodiment of the present invention.

FIG. 6 is an explanatory view (6) showing an embodiment of the present invention.

FIG. 7 is an explanatory view (7) showing an embodiment of the present invention.

FIG. 8 is an explanatory view (8) showing an embodiment of the present invention.

FIG. 9 is a detailed diagram of a mechanism of a hinge portion.

FIG. 10 is an explanatory view (9) showing an embodiment of the present invention.

FIG. 11 is an explanatory view (10) showing an embodiment of the present invention.

FIG. 12 is an explanatory view (11) showing an embodiment of the present invention.

FIG. 13 is an explanatory view of an image reading apparatus according to a conventional technique (1).

FIG. 14 is an explanatory diagram (2) of an image reading apparatus according to a conventional technique.

[Explanation of symbols]

 1: Document 2: Document table 3: Hinge 3a: Hinge 3b: Hinge 4: Transparent plate 5: Reading unit 5a: Driving roller 5b: Reading unit 6: Guide rail 6a: Groove 7a: Reference roller 7b: Auxiliary roller 8: Rack 9: Pinion 10: Slider 11: Compression spring 15: Cable 16: Connector 17: Cover 20, 21: Transceiver 22: Frame line 25: Handle 25a: Hinge 27: Hinge part 28: Locking part 29: Rotating fulcrum 30 : Feeder unit 31, 32, 33: Connector 34: Cable

Claims (18)

[Claims] An original plate (2) on which an original (1) to be read is placed, and a transparent plate (4) sandwiching the original (1), further comprising a transparent plate (4). An image reading apparatus for reading an image by moving a reading unit (5) placed on the reading unit (5), comprising a rod-shaped guide rail (6) for regulating the moving direction of the reading unit (5) during reading scanning. ) Is provided in the upper central part of the transparent plate (4). 2. The guide rail (6) has a substantially H-shaped cross-sectional shape, and a reading unit (5) is provided at its upper portion to contact two linear portions of the guide rail (6). A reference roller (7a).
The image reading device according to claim 1. 3. The reading unit (5) further comprises an auxiliary roller (7b) for pressing the guide rail (6) from the side and pressing the guide rail (6) against the two reference rollers (7a). The image reading device according to claim 1, wherein: 4. The guide rail (6) is mounted on a rack (8).
The reading unit (5) includes a pinion (9) that engages with the rack (8) to move the reading unit (5) to perform reading scanning, and a driving mechanism therefor. Claim 1,
The image reading device according to claim 2. 5. The reading unit (5) includes a drive roller (5a) for moving the reading unit (5) to perform reading scanning at a position facing the transparent plate (4). The image reading device according to claim 1, wherein the image reading device is characterized in that: 6. The slider (10), wherein the reading unit (5) pushes up the guide rail (6) from below and presses the reading unit (5) against the transparent plate (4) with the reaction force. 6. The image reading apparatus according to claim 5, further comprising a pressing mechanism including a pressing spring and a pressing spring. 7. The guide rail (6) according to claim 1, wherein said guide rail (6) is provided with a groove (6a) for accommodating a cable (15) which moves according to the reading scan of said reading unit (5). The image reading device according to claim 2. 8. A door-like cover (8) having a connector (16) exposed on the upper surface of the reading unit (5) at the time of opening the door and making an electrical connection with the cable (15). 17), wherein the cover (17) has a mechanism for positioning the connector (16) above the guide rail (6) when the door is opened.
The image reading device according to claim 7. 9. The reading unit (5) includes a transmitter (20) for infrared communication, and the transparent plate (4) includes a transceiver (21) corresponding to the transceiver (20). The image reading device according to claim 1 or 2, wherein 10. An image reading apparatus according to claim 1, wherein said document table has a frame line for specifying a position of the document to be placed. 11. A hinge part (3) for connecting the platen (2) and the transparent plate (4) together with a rotation mechanism to move the axis of rotation thereof to thereby move the platen (2). 2. The image reading device according to claim 1, further comprising: means for adjusting a gap between the transparent plate and the transparent plate. 12. A hinge portion (3) for connecting the platen (2) and the transparent plate (4) is detachable so that the platen (2) is separated from the transparent plate (4). The image reading device according to claim 1, further comprising a unit. 13. The transparent plate (4) is provided with a handle (25) for applying a downward pressing force during reading scanning to press the placed document (1).
An image reading device according to claim 1. 14. A handle (25) for folding said handle (25) when not in use.
14. The image reading device according to claim 13, comprising a). 15. The guide rail (6) has a hinge part (27) and a lock part (25) for releasing a part of the connection with the transparent plate (4) to release the mounting of the reading unit (5). 28. The image reading apparatus according to claim 1, further comprising: 16. The locking part (2) and the hinge part (27).
The image reading device according to claim 15, characterized in that the image reading device (8) includes a rotation fulcrum (29) for rotating the guide rail (6) after the mounting of the reading unit (5) is released. 17. The reading unit (5) according to claim 1, further comprising a connector (31) for connecting a cable when used as a handy scanner.
6. The image reading device according to 5. 18. A connector (3) directly connected to the sheet feeder unit (30) when the reading unit (5) is mounted on the sheet feeder unit (30).
The image reading device according to claim 15, further comprising: 2).