JPH0537728A - Original reader - Google Patents

Abstract

PURPOSE:To enhance the read accuracy by providing an escaping port to which part of a carriage is escaped to a side wall face at other end with respect to the scanning direction of a case so as to increase the width of the carriage without increasing the size of the case. CONSTITUTION:A carriage 7 is set an initial standby position A when an original reference position (b) is set to the left side of a case 1, and moved to a position B in the scanning state. In this case, part of a projection 7a of the carriage 7 pushes a shutter 10 to be escaped to an escape port 9 opened to a side wall face of an edge 1b of the case 1. Thus, even when the original reference position (b) is set to other end 1b with respect to the scanning direction of the case 1, it is possible to increase the width of the carriage 7 without increasing the size of the case 1 thereby enhancing the read accuracy of an original picture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manuscript reading device having a thin and outer size which is convenient for carrying.

[0002]

2. Description of the Related Art Conventionally, in this type of document reading apparatus (file scanner), a carriage in which an image reading mechanism as a document reading means is incorporated and mounted in a portable book-like casing having a thin outer shape. Built in,
By guiding and moving the carriage by the driving means, the image of the original document on the original document table held by the openable platen cover is scanned and read, and the image is formed by the other connected image forming apparatus. Some have configurations.

In such a document reading apparatus, usually, the carriage is moved in the scanning direction from a predetermined document reference position based on a document scale provided on a document placing table on one end of the casing. The document image is read and scanned by moving it toward the guide.

[0004]

However, in the above-described document reading apparatus having the conventional structure, when the document reference position is set on the other end side in the scanning direction of the casing,
Since the carriage has a predetermined width, it hits the side wall surface on the other end side of the housing, and the width in the scanning direction is regulated and narrowed by that amount, which results in a width corresponding to the limited original size. It is not possible to effectively use the document placing table having the.

For this reason, conventionally, the size of the housing is increased to increase the width in the scanning direction, or the width of the carriage is decreased. To increase the size of the carriage is against the miniaturization of the device, and to reduce the width of the carriage,
L constituting an image reading mechanism incorporated in the carriage
Since the dimensions of each component such as the ED array, the fiber lens array (trade name: SELFOC lens), and the line sensor are limited, there is a problem that there is a limit in reading a clear original image.

The present invention has been made under the above circumstances, and an object of the present invention is to increase the width of the carriage and increase the accuracy of reading an original image without increasing the size of the housing. An object of the present invention is to provide a document reading device that can be enhanced.

[0007]

In order to solve the above-mentioned problems, the present invention has a platen cover which is openable and closable and has a document placing table of a size corresponding to a predetermined document size. A casing having outer dimensions, an original reading unit provided in the casing and reading an image of an original placed on the original placing table by moving in the scanning direction, and an image reading mechanism of the original reading unit. And a carriage that supports the carriage so as to be guided and movable in a scanning direction from a predetermined document reference position on one end side of the housing, and on a side wall surface of the housing on the other end side with respect to the scanning direction, A configuration is provided in which a part of the carriage is provided with an escape port that can be retracted.

[0008]

That is, according to the present invention, a part of the carriage on which the image reading mechanism of the document reading means is supported to be guided and movable can be retracted on the side wall surface on the other end side in the scanning direction of the housing. Therefore, even if the document reference position is set on the other end side in the scanning direction of the housing, the width of the carriage can be increased without increasing the size of the housing.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 2, reference numeral 1 in the drawing denotes a housing forming the main body of the apparatus, for example, the maximum document size is A4 size. The entire form having the document placing table 2 of a corresponding size has a thin book shape.

A platen cover 3 is provided on the document mounting table 2 of the housing 1 so as to be openable and closable, and the platen cover 3 closes the document G mounted on the document mounting table 2. It is designed to be pressed in from above.

As shown in FIG. 1, a document image reading mechanism including an LED array 4, a fiber lens array (product name: SELFOC lens) 5 and a line sensor 6 is incorporated in the housing 1. A carriage 7 as a document reading unit is arranged, and the carriage 7 is
The image reading mechanisms 4, 5 and 6 are usually provided on the right end 1a side of the casing 1 by a driving means (not shown) for the image of the original G placed on the original placing table 2. The document scale 8 is used as a reference and is guided and moved in the scanning direction X from the document reference position a toward the left side, so that the image reading mechanisms 4, 5 and 6 read and scan the document image.

Reference numeral 9 in the drawing denotes an escape port opened in the side wall surface of the casing 1 on the side of the other end 1b with respect to the scanning direction X. The escape port 9 faces the outside of the casing 1. A shutter 10 that can be opened and closed is provided.

As shown in FIG. 2, when the original document reference position b is set with reference to the original document scale 11 provided on the other end 1b on the left side of the casing 1, the escape port 9 is set to the position shown in FIG.
As shown in, a part of the protrusion 7a of the carriage 7 pushes the shutter 10 away so that it can be retracted.

That is, the carriage 7 has an initial standby position (normal position) A when the document reference position b is set on the left side of the housing 1, as shown in FIG. Power switch 1 of the main body of the device at the time of standby and scanning
As shown in FIG. 3, it is moved to the left side position position (original setting position) B by step 2.

As described above, the power switch 12 of the apparatus main body
Then, the carriage 7 is moved to the position position (original setting position) B, and then the start key is pressed to start the scanning. The flow chart of this scanning is shown in FIG.

Further, a document reference position b is provided on the left side of the casing 1.
When there is an obstacle 100 on the side of the escape opening 9 on the left side of the housing 1, the carriage 7 starts to move by turning on the power switch 12, and the carriage 7 is directed to the position B. When the projecting portion 7a hits the obstacle 100 by moving, the driving means (not shown) is controlled to stop under the moving load at this time, and an abnormality is displayed by an alarm display.

As a result, the carriage 7 stops before scanning, so that it does not affect the read image, and scanning is started immediately after the obstacle 100 is removed.

[0018]

As is apparent from the above description, according to the present invention, the side wall surface on the other end side in the scanning direction of the housing is
Since the image reading mechanism of the document reading means is provided with an escape hole through which a part of the carriage supported for guide movement can be retracted, the document reference position is set to the other end side in the scanning direction of the housing. However, it is possible to increase the width of the carriage without increasing the size of the housing, and thus it is possible to eliminate the dimensional restriction of each component constituting the image reading mechanism as before. Therefore, the reading accuracy of the original image can be improved.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a document reading apparatus according to an embodiment of the present invention with a platen cover removed at an initial standby position of a carriage.

FIG. 2 is an external view of the original reading device showing the overall configuration of the platen cover in an open state.

FIG. 3 is a sectional view showing a state where the carriage is moved to a position position.

FIG. 4 is a flowchart of the same document reading scan.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing | casing 1a, 1b ... End part, 2 ... Original document mounting base, 3 ... Pline cover, 4, 5, 6 ... Image reading mechanism, 7 ... Carriage, 7a ... Protrusions,
8 ... Original scale, 9 ... Escape port, 10 ... Shutter, 11 ... Original scale, 12 ... Power switch, a, b ... Original reference position, A ... Initial standby Position, B ... Original setting position, X ... Scanning direction, G
..Manuscripts

Claims (1)

Claim: What is claimed is: 1. A housing having a thin and portable outer shape having a platen cover provided with a platen cover openably and closably and having a size corresponding to a predetermined document size; And a document reading unit for reading an image of a document placed on the document placing table by moving it in the scanning direction, and a reading mechanism of the document reading unit is provided at a predetermined position on one end side of the casing. A carriage supporting the guide from the original reference position so as to be movable in the scanning direction, and on the side wall surface on the other end side in the scanning direction of the casing,
An original reading device, characterized in that a part of the carriage is provided with an escape opening.