JPH1056539A - Image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize an image reader which reads images of still document and moving document and to narrow its installation area. SOLUTION: A thick plate is provided with which a movable plate 16b is freely slidably fitted to a frame 16a, and an ADF device 19 is attached to the frame 16a so that the device 19 can freely move vertically to attach to and detach from a contact glass 15. The plate 16b is provided so that it freely slides to its close position which closes between the glass 15 and the device 19 with the device 19 covering over the glass 15 and to its open position which opens between the glass 15 and the device 19 and allows the device 19 to adjacently move downward to the glass 15. Because image reading of moving document which is carried by the device 19 is performed by using a part of an area which is covered with the thick board 16 to read an image of still document, this image reader is miniaturized and its installation area is narrowed.

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 of a moving original and an image of a still original with a single contact image sensor.

[0002]

2. Description of the Related Art Conventionally, there is an image reading apparatus in which an image of a moving original conveyed by an ADF device and an image of a stationary original set stationary on a contact glass are read by a single contact image sensor. 6 and 7 are known. The image reading apparatus includes a stationary document reading unit 1 for reading a still document image and an ADF
A moving document reading unit 3 for reading an image of the moving document conveyed by the apparatus 2;

The stationary document reading section 1 is formed by a first contact glass 5 fixed to an upper surface of a main body case 4, a pressure plate 6 covering the upper surface of the first contact glass 5, and the like. On the first contact glass 5, a stationary original such as a book original (a double-page spread of a book as a read original) or a sheet original is placed in a stationary state. The movable document reading unit 3 includes a second contact glass 7 fixed to an upper surface of the main body case 4 and the A fixedly disposed on the second contact glass 7.
It is formed by the DF device 2 and the like.

Below the first and second contact glasses 5 and 7 in the main body case 4, a scanner unit 9 provided with a contact image sensor 8 for reading an image of a stationary original or an image of a moving original is movable. It is provided so that it can be fixed at any position. The scanner unit 9 is formed by housing a xenon lamp 10, a roof mirror lens array 11, the close contact image sensor 8, and the like in a case 12.

[0005] An operation panel 13 provided with numeric keys and various operation keys is provided on a front portion of the main body case 4. An image recording unit (not shown) for recording a read image on recording paper is provided below the scanner unit 9 in the main body case 4.

[0006]

According to the image reading apparatus shown in FIGS. 6 and 7, the stationary document reading section 1 and the moving document reading section 3 are arranged adjacent to each other. Therefore, the width of the image reading device is increased, and the demand for reducing the size of the image reading device and reducing the installation area of the image reading device cannot be satisfied.

Accordingly, the present invention provides an image reading apparatus capable of reading an image of a stationary original and an image of a moving original with a single contact image sensor, and further reducing the size of the apparatus and reducing the installation area of the apparatus. The purpose is to gain.

[0008]

According to the first aspect of the present invention,
A contact glass provided on the upper surface of the main body case,
An image reading device provided below the contact glass so as to be movable and fixed at an arbitrary position to read an image of a document on the contact glass, and a pressure plate for opening and closing the upper surface of the contact glass. Wherein the pressure plate is formed by a frame portion and a movable plate slidably fitted to the frame portion,
A closing position for covering the upper surface of the contact glass and for closing the space between the contact glass and the ADF device; An opening was provided between the contact glass and the ADF device so as to be slidable to an open position allowing the ADF device to move to a lower position close to the contact glass. Therefore, by moving the ADF device to an upper position away from the contact glass and sliding the movable plate to the closing position, the stationary document placed on the contact glass is covered with the pressure plate, and the stationary image sensor is moved by moving the contact image sensor. Can be read. On the other hand, the movable plate is slid to the open position, the ADF device is moved to a lower position close to the contact glass, and the contact image sensor is fixed at a position facing the ADF device, thereby being conveyed by the ADF device. The image of the moving document can be read by the contact image sensor.

According to a second aspect of the present invention, in the first aspect of the invention, when the movable plate is slid to the closed position, the ADF device is moved to an upper position away from the contact glass and held, and The movable plate is provided with a holding portion for releasing the holding of the ADF device when the ADF is slid to the open position. Therefore, by sliding the movable plate to the closed position, the ADF device is automatically moved to the upper position to be separated from the contact glass, and the stationary document placed on the contact glass is covered with the pressure plate to adhere the image closely. It can be read by an image sensor. When the movable plate is slid to the open position, the ADF device can be automatically brought close to the contact glass,
The image of the moving document conveyed by the DF device can be read by the contact image sensor. Therefore, switching between the state of reading the image of the stationary document and the state of reading the image of the moving document can be performed only by the sliding operation of the movable plate.

According to a third aspect of the present invention, in the first or second aspect, the ADF device is detachably attached to the pressure plate. Therefore, the ADF device is treated as an option, and the cost of the main body of the image reading device is reduced.

[0011]

FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. This embodiment corresponds to the first aspect of the present invention. One contact glass 15 is fixed to the upper surface of the main body case 14, and the scanner unit 9 is provided below the contact glass 15 so as to be movable and freely fixed at an arbitrary position. The scanner unit 9 is formed by housing a xenon lamp 10, a roof mirror lens array 11, a contact image sensor 8, and the like in a case 12.

A pressure plate 16 is attached to the upper part of the main body case 14 so as to open and close the contact glass 15. The pressure plate 16 is composed of a frame portion 16a and a movable plate 16 slidably fitted to the frame portion 16a.
b. A pair of guide rail portions 17 is fixed to the end of the frame portion 16a, and these guide rail portions 17 are formed with a substantially crank-shaped rail groove 18. AD between the guide rail portions 17
An F device 19 is disposed, and pins 20 fixed to both ends of the ADF device 19 are slidably fitted in the rail grooves 18, and the pins 20 are slid along the rail grooves 18 so that the ADF device 19 is moved. Move up and down so as to come into contact with and separate from the contact glass 15.

The movable plate 16b covers the upper surface of the contact glass 15 and
A closing position for closing the space between the contact glass 15 and the ADF device 19; and opening the space between the contact glass 15 and the ADF device 19 so that the ADF device 19
5 is slidably provided to an open position that allows movement to a lower position close to 5.

An image reading of a still original placed on the contact glass 15 in such a configuration will be described. As shown in FIG. 2A, the ADF device 19 is moved to the upper position to be separated from the contact glass 15, and the movable plate 16b is slid to the closed position. The stationary original placed on the contact glass 15 is covered with the pressure plate 16 in such a state, and the image reading start key on the operation panel 13 provided on the front part of the main body case 14 is pressed. Then, the scanner unit 9 reciprocates along the contact glass 15, and the image of the still original is read by the contact image sensor 8.

The image reading of a moving document conveyed by the ADF device 19 will be described. The movable plate 16b is slid to the open position as shown in FIG.
The ADF device 19 is moved downward along the rail groove 18 as shown in FIG. Then, the moving document is set on the ADF device 19 and the image reading start key is pressed. Then, the set moving document is conveyed by the ADF device 19, and the image of the moving document is read by the close contact image sensor 8 of the scanner unit 9 which stands by at a position facing the ADF device 19.

In this image reading apparatus, an image of a moving document conveyed by the ADF device 19 is read using a part of an area covered by the pressure plate 16 for reading an image of a still document. The width may be any size that is sufficient to read an image of a still original. Therefore, the size of the image reading device can be easily reduced, and the installation area of the image reading device can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. 1 and 2 are designated by the same reference numerals (the same applies hereinafter).
This embodiment corresponds to the second aspect of the present invention. A pressure plate 16 that covers the contact glass 15 so that it can be opened and closed is attached to the upper part of the main body case 14, and the pressure plate 16 is formed by a frame portion 16a and a movable plate 16b. A pair of guide rails 17 is fixed to the end of the frame 16a, and the guide rails 17 are formed with rail grooves 21 extending vertically. ADF device 1
Pins 20 fixed to both ends of the rail 9 are slidably fitted in the rail grooves 21.

The movable plate 16b is provided with the movable plate 16b.
The ADF device 19 is brought into contact with the lower edge of the pin 20 when the
The ADF device 19 is moved away from the pin 5 and held at that position and held at that position. When the movable plate 16b is slid to the open position, the movable plate 16b is separated from the pin 20 to release the holding of the ADF device 19, whereby the ADF device 19 is released. A pair of holding parts 22 for moving to a lower position are formed.

In such a configuration, FIG.
3 shows a state in which an image of a still original placed on the contact glass 15 is read. In this state, the movable plate 16b slides to the closed position, and the upper edge 22a of the holding portion 22 comes into contact with the lower edge of the pin 20, whereby the ADF device 19 is moved.
Is held in a state of having moved to the upper position. The stationary original placed on the contact glass 15 is covered with the pressure plate 16 in this state, and the image reading start key on the operation panel 13 is pressed. Then, the scanner unit 9 reciprocates along the contact glass 15, and the image of the still original is read by the contact image sensor 8.

FIG. 3B shows a state in which switching from the state of reading an image of a still original to the state of reading an image of a moving original conveyed by the ADF device 19 is in progress. When the movable plate 16b is slid by a predetermined dimension toward the open position,
The upper end edge 22a of the holding portion 22 comes off the pin 20, and the pin 20 contacts the tapered edge 22b of the holding portion 22. When the movable plate 16b is continuously slid toward the open position, the pin 20 descends along the tapered edge 22b, and the ADF device 19 gradually moves downward.

FIG. 3C shows that the movable plate 16b is slid to the open position and the ADF device 19 is
5 shows a state in which it has been moved to a lowermost position close to 5. The pin 20 is fitted on the lowermost end of the rail groove 18. In this state, the moving document is set on the ADF device 19,
Press the image reading start key. Then, the set moving document is conveyed by the ADF device 19, and the image of the moving document is read by the close contact image sensor 8 of the scanner unit 9 which stands by at a position facing the ADF device 19.

When switching from the state of reading the image of the moving original conveyed by the ADF device 19 to the state of reading the image of the stationary original, the state shown in FIG.
Slide b toward the closed position. When the movable plate 16b is slid to a predetermined position, the tapered edge portion 22b of the holding portion 22 comes into contact with the outer peripheral surface on the lower end side of the pin 20. When the movable plate 16b is continuously slid toward the closed position after the contact, the ADF device 19 is gradually pushed up by the contact between the pin 20 and the tapered edge 22b, and the movable plate 1
When the 6b is slid to the closed position, the upper edge 22a of the holding portion 22 comes into contact with the lower edge of the pin 20, and the ADF device 19 is moved up from the contact glass 15 as shown in FIG. Move to.

In this image reading apparatus, an image of a moving document conveyed by the ADF device 19 is read using a part of an area covered by the pressure plate 16 for reading an image of a still document. The width may be any size that is sufficient to read an image of a still original. Therefore, the size of the image reading device can be easily reduced, and the installation area of the image reading device can be reduced. Further, the ADF device 19 can be automatically moved up and down by the sliding operation of the movable plate 16b. Therefore, the switching between the state of reading the image of the stationary document and the state of reading the image of the moving document can be performed by sliding the movable plate 16b. It can be easily performed only by operation.

Next, a third embodiment of the present invention will be described with reference to FIG.
It will be described based on. This embodiment corresponds to the third aspect of the present invention. The basic structure of this embodiment is the same as that of the first embodiment shown in FIGS. 1 and 2, except that the guide rail portion 17 is detachably attached to the frame portion 16a. . The guide rail 17 is attached to the frame 16a by attaching the projection 2 formed in the guide rail 17 to the mounting hole 23 formed in the frame 16a.
4 is engaged.

In such a configuration, in the present embodiment, it is possible to read an image of a stationary document placed on the contact glass 15 and to read an image of a moving document conveyed by the ADF device 19. In addition, the image reading of the moving original conveyed by the ADF device 19 is performed using a part of the area covered by the pressure plate 16 for reading the image of the static original. What is necessary is just to have a dimension enough to read an image. Therefore, the size of the image reading device can be easily reduced, and the installation area of the image reading device can be reduced.

Further, in the present embodiment, the ADF device 19
Can be treated as an option, and the cost of the main body of the image reading apparatus can be reduced.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
It will be described based on. This embodiment corresponds to the third aspect of the present invention. The basic structure of this embodiment is the same as that of the second embodiment shown in FIG. 3, except that the guide rail portion 17 is detachably attached to the frame portion 16a. The guide rail 17 is attached to the frame 16a by using the mounting holes 2 formed in the frame 16a.
3 is engaged with a projection 24 formed on the guide rail portion 17.

In such a configuration, in the present embodiment, it is possible to read an image of a stationary document placed on the contact glass 15 and to read an image of a moving document conveyed by the ADF device 19. In addition, since the image reading of the moving document conveyed by the ADF device 19 is performed using a part of the area covered by the pressure plate 16 for reading the image of the still document, the horizontal width of the image reading device is What is necessary is just to have a dimension enough to read an image. Therefore, the size of the image reading device can be easily reduced, and the installation area of the image reading device can be reduced.

Further, the ADF device 19 can be automatically moved up and down by sliding the movable plate 16b.
Switching between the state of reading an image of a stationary document and the state of reading an image of a moving document can be easily performed only by sliding the movable plate 16b.

Further, the ADF device 19 can be treated as an option, and the cost of the main body of the image reading device can be reduced.

[0031]

According to the first aspect of the present invention, the contact glass provided on the upper surface of the main body case, and the contact glass provided below the contact glass so as to be movable and fixed at any position. An image reading apparatus having a contact image sensor for reading an image of a document and a pressure plate that covers the upper surface of the contact glass so as to be openable and closable. The ADF device is attached to the frame portion so as to be vertically movable so as to be in contact with or separated from the contact glass, and the movable plate covers the upper surface of the contact glass, and moves between the contact glass and the ADF device. Opening between the contact glass and the ADF device by closing the closed position and closing the ADF
Since the DF device is slidably provided to an open position that allows the DF device to move to a lower position close to the contact glass, the image reading of the moving document conveyed by the ADF device is performed in order to read the image of the still document. This can be performed by using a part of the area covered by the pressure plate. Therefore, the width of the image reading device only needs to be large enough to read an image of a still document, and the size of the image reading device can be easily reduced. It is possible to reduce the installation area of the image reading apparatus.

According to the second aspect of the invention, when the movable plate is slid to the closed position, the ADF device is moved to and held at an upper position away from the contact glass, and the movable plate is slid to the open position. Since the movable plate is provided with a holding portion for releasing the holding of the ADF device from time to time, it is possible to automatically move the ADF device to the upper position and separate from the contact glass by sliding the movable plate to the closed position. The ADF device can be automatically brought close to the contact glass as the movable plate is slid to the open position, so that the image of the stationary document can be read and the image of the moving document can be read. Can be easily changed only by sliding the movable plate.

According to the third aspect of the present invention, since the ADF device is detachably mounted on the pressure plate, the ADF device can be treated as an option, and the cost of the main body of the image reading device can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional front view showing a structure of a main part, in which (a) slides a movable plate to a closed position to read an image of a still original, and (b) slides the movable plate from a closed position to an open position. (C) is a state in which the movable plate is slid to the open position and the ADF device is moved downward.

FIG. 3 is a longitudinal sectional front view showing a structure of a main part of a second embodiment of the present invention, in which (a) is a state in which a movable plate is slid to a closed position to read an image of a still original, and (b) is a state. A state in which the movable plate is being slid from the closed position to the open position,
(C) shows a state where the movable plate is slid to the open position and the ADF device is moved downward.

FIGS. 4A and 4B are longitudinal sectional front views showing the structure of the main part of a third embodiment of the present invention, wherein FIG. 4A shows a state in which a movable plate is slid to a closed position to read an image of a still original, and FIG. A state in which the movable plate is being slid from the closed position to the open position,
(C) shows a state where the movable plate is slid to the open position and the ADF device is moved downward.

FIG. 5 is a longitudinal sectional front view showing a structure of a main part of a fourth embodiment of the present invention, in which (a) is a state in which a movable plate is slid to a closed position to read an image of a stationary original, and (b) is a state. A state in which the movable plate is being slid from the closed position to the open position,
(C) shows a state where the movable plate is slid to the open position and the ADF device is moved downward.

FIG. 6 is a perspective view showing a conventional example.

FIG. 7 is a vertical sectional front view showing a part thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Contact image sensor 14 Main body case 15 Contact glass 16 Pressure plate 16a Frame part 16b Movable plate 19 ADF device 22 Holding part

Claims (3)

[Claims] A contact glass provided on an upper surface portion of a main body case; a contact image sensor provided below the contact glass so as to be movable and fixed at an arbitrary position to read an image of a document on the contact glass; An image reading apparatus having a pressure plate that covers the upper surface of the contact glass so as to be openable and closable, wherein the pressure plate is formed by a frame portion and a movable plate slidably fitted to the frame portion, and the ADF device is provided with the contact glass. The movable plate is attached to the frame part so as to be vertically movable so as to be in contact with and separated from the contact glass, and the movable plate covers the upper surface of the contact glass and closes the contact glass and the ADF device. A lower position where the space between the ADF device and the ADF device is opened and the ADF device is close to the contact glass. An image reading apparatus, wherein the image reading apparatus is slidably provided to an open position allowing movement to the image reading apparatus. 2. When the movable plate is slid to a closed position, the ADF device is moved to and held at an upper position separated from the contact glass, and when the movable plate is slid to the open position, the ADF device is held. 2. The image reading apparatus according to claim 1, wherein a holding portion for releasing the image is provided on the movable plate. 3. The image reading device according to claim 1, wherein the ADF device is detachably attached to the pressure plate.