JPH086178A - Document image reader - Google Patents

Abstract

PURPOSE:To provide a document image reader whose operability is excellent and which is safe and inexpensive without obstructing by a document tray provided at an upper side even at the time of reading a small size document. CONSTITUTION:The document image reader reading a document image by fixing a document placed on a platen glass by a document covet plate possesses the document cover plate 1 pivotally supported so as to make at least, one part thereof independently open and close, a small size document cover plate 1a constituting the independent part of the document cover plate 1, a rotating part 1b provided at the document cover plate 1 and pivotally supporting the small size document cover plate 1a, an ADF document tray 2 provided at the upper side of the document cover plate 1 and a retreating returning means 3 retreating the document tray 2 from the passage of the small size document cover plate la at the time of opening the small size document cover plate 1a and returning the document tray 2 to the passage of the small size document cover plate 1a at the time of closing and stopping the small size document cover plate 1a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document image reading apparatus used in a copying machine, a scanner, a scanner, or a multi-function machine having these functions together, and more particularly to a document placed on a platen glass as a document. The present invention relates to a document image reading device that fixes a pressing plate to read a document image.

[0002]

2. Description of the Related Art As a conventional document image reading apparatus,
For example, there is a document image reading device in which an ADF (Automatic Document Feeding Device) unit is placed on the reading device body to read a document image. FIG. 3 is an explanatory view of a conventional document image reading apparatus, in which a document holding plate 1 is pivotally supported by a shaft S1 so as to be vertically openable and closable so as to open and close a platen glass on an upper surface of a document image reading apparatus main body 0. There is. Reference numeral 4 is an ADF integrated with the original holding plate 1.
Reference numeral 2 denotes a unit, which is a document tray for setting a document to be fed. In such a document image reading apparatus 0, it is necessary to open the entire document holding plate 1 integrated with the heavy ADF (automatic document feeder) unit 4 even when reading a small-sized document. In order to solve the problem, there is also proposed a device in which a part of the document holding plate 1 (small size document holding part 1a) is pivotally supported independently by an axis S2 so as to be openable and closable. However, in such a conventional example, the document tray 2 in the ADF unit may interfere when opening the divided small-size document pressing portion and may collide with one or both of them. It was Further, in order to avoid a collision, the operator has to perform an operation such as retracting and returning the document tray each time, which causes a problem of poor operability.

[0003]

In the above-mentioned conventional document image reading apparatus, when the small-size document holding portion forming a part of the document holding plate is independently opened at the time of reading a small-size document. In addition, there is a problem that the operability is deteriorated when the original document tray protruding upward is collided and damaged, or when the original document tray and the like are moved forward and backward to avoid the collision.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention is to solve such a problem. That is, according to the present invention, even when reading a small-sized original, the original tray provided above the small-sized original pressing portion does not hinder the opening / closing operation, and is a safe and inexpensive original image with excellent operability. An object is to provide a reading device.

[0005]

In order to achieve the above object, the present invention provides at least one document image reading apparatus for reading a document image by fixing a document placed on a platen glass with a document holding plate. A document holding plate that is pivotally supported to open and close independently, a small-size document holding plate that forms the independent part of the document holding plate, and a small-size document provided on the document holding plate. A rotating portion that pivotally supports the pressing plate, an ADF document tray provided above the document pressing plate, and the document tray from the passage of the small document pressing plate when the small document pressing plate is opened. Retracting means for retracting and returning the original tray to the passage of the small original pressing plate when the small original pressing plate is closed, the retracting returning means includes a returning member, and the original tray is provided. An extension tray rotatably provided on the rotating part of the retractable member can be retracted or returned from the passage of the small-sized document pressing plate by the returning member, and the retracting / returning device includes an interlocking device. When the small-size document holding plate is opened and closed, the document tray is interlocked with the interlocking means to rotate and retract or return from the passage of the small-size document holding plate.

[0006]

In the document image reading apparatus constructed as described above, the document tray provided above the small-size document holding portion forming a part of the document holding plate is opened from the passage when the small-size document holding plate is opened and closed. By automatically retracting or returning, even when reading small-sized originals, the original document tray provided above does not obstruct the operation, providing a safe and inexpensive original image reading device with excellent operability. To be able to.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a document image reading apparatus as an embodiment of the present invention. The document image reading apparatus main body 0 is attached to a reading unit such as a copying machine or a scanner (not shown). The document image reading apparatus main body 0 includes a document pressing plate 1 which is pivotally supported at one end by a fulcrum 2c and which can be opened and closed in the vertical direction, and an ADF (Automatic Document Feeding Device) unit 4 integrated with the pressing plate 1. ,
The document tray 2 is provided on the top of the ADF unit and protrudes above the holding plate 1. A platen glass 5 is arranged on the upper surface of the apparatus main body 0, and a document 6 set on the platen glass 5 is pressed by the holding plate 1 to be positioned. The original 6 set on the platen glass 5 is scanned by a scanner unit (not shown) provided below the platen glass 5 so as to face the original 6, and an image of the original 6 is read.

A rotating portion 1b is provided at an intermediate portion of the original pressing plate 1.
A shaft is provided, and the small-size document holding plate 1a is rotatable about the rotating portion 1b in the direction of the arrow B, and the holding plate 1 is used to place the small-sized document 6 thereon.
It is opened and closed independently of the main body. Small size document holding plate 1
“A” is used when a small-sized original is manually set on the platen glass. The document tray 2 has an extension tray 2b that is provided so as to be rotatable in a direction of an arrow C shown by a rotating portion 2a (axis). The position of the rotating portion 2a is set to a position that does not obstruct the opening of the small-sized document pressing plate 1a in the C direction. Therefore, when the small-sized document pressing plate 1a is opened by independently rotating in the direction of the arrow B in the drawing, the extension tray 2b of the document tray 2 rotates about the rotating portion 2a. Extension tray 2b of original tray 2 when size original pressing plate 1a is opened
Is retracted from the passage of the small-sized document holding plate 1a, and the document tray 2 and the extension tray 2b do not interfere with each other and do not collide with or break.

An inexpensive return member 3a, which is simply a torsion spring or the like, is provided on the rotating portion 2a as the retracting and returning means 3 as shown in the figure. The return member 3a is configured so that when the small-sized document pressing plate 1a is opened by rotating in the direction of the arrow B shown in the figure, it does not give a large resistance to the opening operation of the small-sized pressing plate 1a. However, the returning member 3a is used for the small-sized document pressing plate 1.
When a is closed by rotating in the closing direction opposite to the direction of arrow B in the drawing, a part of the extension tray 2b of the document tray 2 is fixed at a fixed position (position shown by a solid line) which is a passage of the small size document holding plate 1a. In addition, it is designed to be automatically restored.

At this time, the maximum load value (elastic force) of the return member 3a is set to be weaker than the force of pushing back the small-size document pressing plate 1a by rotating it in the closing direction opposite to the arrow B direction. There is. Therefore, when the holding plate 1a is opened as shown by the dotted line for reading a small-sized original 6, the original tray 2 does not become an obstacle and the open position of the dotted line can be maintained. It is possible to provide a safe and inexpensive original image reading apparatus with excellent operability.

FIG. 2 shows another embodiment of the present invention. In the evacuation / recovery means 3, the document tray 2 is operated when the small size document holding plate 1a is opened in the direction of arrow D (when the ADF is not used). It has interlocking means 3b which interlocks. This interlocking means 3b
Is operated when the small-size document holding plate 1a is opened as shown by the dotted line, and the document tray 2 is rotated in the direction of arrow E to retract from the passage of the small-size document holding plate 1a. 2 is rotated in the opposite direction to return to the solid line position. The interlocking means 3b is provided, for example, between the pulley 7a integrated with the rotating shaft that constitutes the rotating portion 1b of the small size document holding plate 1a, the pulley 7b integrated with the rotating shaft 2d of the document tray 2, and both pulleys. Pulley 7c
And a belt 8a and a belt 8b which are respectively wound around these three pulleys 7a, 7b and 7c. Therefore, the torque generated by the rotation of the pulley 7a integral with the shaft of the small-sized document pressing plate 1a is transmitted to the document tray 2 via the belt 8a, the pulley 7c, the belt 8b, and the pulley 7b to move it up and down. Becomes Therefore,
The document tray 2 automatically retracts or returns from the passage of the small-sized document holding plate 1a automatically in association with the opening / closing operation of the detailed drawing document holding plate 1a, so that even when reading a small-sized document 6, It is possible to provide a safe and inexpensive original image reading apparatus that is excellent in operability without causing the original tray 2 provided above to become an obstacle.

[0012]

Since the present invention is constructed as described above, the original tray provided above is retracted or returned from the passage when the small-size original pressing plate is rotated, so that Even when scanning a size original,
The original tray provided above does not interfere,
It has become possible to provide a safe and inexpensive original image reading device with excellent operability.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating a document image reading apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a document image reading apparatus according to another embodiment of the present invention.

FIG. 3 is an explanatory diagram of a document image reading apparatus of a conventional example.

[Explanation of symbols]

0 ... Original image reading apparatus main body, 1 ... Original document holding plate, 1a ... Small size original document holding plate, 1b ... Rotating part, 2 ... Original document tray, 2a ... Rotating part 2b ...
・ Extension tray, 2c ... fulcrum, 2d ...
... Retracting and returning means 3a ... Returning member 3b ...
Interlocking means, 4 ... ADF unit, 5 ... Platen glass, 6 ... Original, 7 ... Pulley, 7a-c ...
Pulley, 8 ... Belt, 8a-b ... Belt.

Claims (3)

[Claims] 1. In a document image reading device for reading a document image by fixing a document placed on a platen glass with a document retaining plate, at least a part of the document retaining plate pivotally supported so as to open and close independently. A small size document holding plate which constitutes the independent part of the document holding plate, a rotating portion provided on the document holding plate to pivotally support the small size document holding plate, and the document holding plate. When the ADF original document tray provided above and the small size original document retaining plate are opened, the original document tray is retracted from the passage of the small size original document retaining plate, and the original document tray is closed when the small size original document retaining plate is closed. An original image reading apparatus having an evacuation return means for returning to the passage of the small-sized original pressing plate. 2. The retracting and returning means according to claim 1, further comprising a returning member, wherein an extension tray rotatably provided on a rotating portion of the original tray holds the small-sized original document by the returning member. An original image reading device having a configuration in which it is retracted or returned from a passage of a plate. 3. The retracting and returning means according to claim 1, further comprising interlocking means, wherein the original tray is interlocked with the interlocking means to rotate when the small-size original pressing plate is opened and closed. An original image reading apparatus, which is configured to retract or return from a passage of a small-sized original pressing plate.