JPH0746377A - Scanner device - Google Patents

Abstract

PURPOSE:To accurately set up a reading range also on an original of small size and to automatically set up the size of a set original. CONSTITUTION:This scanner device is provided with an original platen 2 capable of loading an original 3 and having light transmissivity, a moving optical board 1 for reading out an original by an optical reading element while moving the platen 2 in a sub-scanning direction 4, needles 6e, 6f to be moved in a main scanning direction 8 and the sub-scanning direction 4, LEDs 7e, 7f to be light emitting elements fixed to respective needles 6e, 6f, light receiving elements 5g, 5h, 5i arranged on the optical board 1 correspondingly to respective original sizes and capable of receiving lights from the LEDs 7e, 7f and converting the light into electrical detection signals 15g, 15h, 15i, and a control part 16 for determining the reading range of the optical board 1 based upon these detection signals 15g, 15h, 15i.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scanner device,
More specifically, the present invention relates to a scanner device characterized by detection of a document size and setting of a reading range in the sub-scanning direction.

[0002]

2. Description of the Related Art As shown in FIGS. 3 and 4, a conventional scanner apparatus includes a moving optical table 1A having an optical reading element (not shown), a photo interrupter 10, a document table 9, and pointers 11e and 11f. It has and.

Moving optical table 1A and photo interrupter 10
And are fixed. When the document 3 placed on the document table 9 is read, as the moving optical table 1A moves in the sub scanning direction 4, the photo interrupter 10 causes the pointers 11e and 11f to move.
Is detected and the reading range in the sub-scanning direction from the first detected point (pointer 11e) to the next detected point (pointer 11f) is set as the effective image. In FIG. 3, the effective image of the original 3 is shown by the hatched portion.

[0004]

However, the conventional scanner device has the following problems. When reading a small-sized document 3 on the document table 9, it is difficult to accurately align it with the desired position because the distance d from the tip of the pointers 11e and 11f to the document 3 is large. In order to set the size of the placed document 3, it is necessary to operate the switch of the operation panel.

[0005]

A scanner device according to the present invention has been made to solve the above-mentioned problems.
A manuscript table on which a manuscript is placed and which is light-transmissive, a moving optical table on which the manuscript is read by an optical reading element while moving on the manuscript table in the sub-scanning direction, and the manuscript mounting surface of the manuscript table opposite Two pointers arranged in the sub-scanning direction of the surface and movable in the main-scanning direction and the sub-scanning direction, light-emitting elements provided in each of these pointers, and the moving optical table for each document size. Correspondingly, a plurality of light receiving elements that are arranged and receive the light of the light emitting element and convert it into an electrical detection signal, and a control unit that determines the reading range of the movable optical base based on the detection signal are provided. I was prepared.

Further, the control section judges the original size of the original based on the detection signal of any one of the light receiving elements according to the movement of the movable optical table, and at the same time, detects the first detection signal and the next detection signal. The reading range in the sub-scanning direction is determined based on the signal.

[0007]

The document is placed on the document table, and the pointer is moved in the main scanning direction and the sub scanning direction to the desired position.
Two pointers are lined up in the sub-scanning direction, and the light of each light emitting element is transmitted through the document table. Therefore, the light receiving element can output the detection signal when it reaches the light emitting element.

When the movable optical table starts moving in the sub-scanning direction, the light of the first light emitting element is received by one of the light receiving elements, and the light receiving element outputs a detection signal. Then,
The control unit determines the document size (reading range in the main scanning direction) based on which light receiving element the detection signal is output from, and starts reading the document within the document size by the moving optical table.

When the movable optical table continues to move in the sub-scanning direction, the light of the next light emitting element is received by the light receiving element that outputs the first detection signal, and the light receiving element outputs the detection signal again. Then, the control unit ends the reading of the document by the moving optical table. In this way, the reading range in the sub-scanning direction is determined by the first detection signal and the next detection signal.

[0010]

1 is an explanatory view showing an embodiment of a scanner device according to the present invention, and FIG. 2 is a side view of FIG. The present invention will be described below with reference to these drawings. Note that FIG.
Is a plan view with a block diagram and a waveform diagram added.

In the scanner device according to the present invention, the original 3 is placed and the original table 2 having optical transparency and an optical reading element (not shown) for the original 3 while moving on the original table 2 in the sub-scanning direction 4. The pointer 6e is arranged in the sub-scanning direction 4 on the surface 2b of the manuscript table 2 opposite to the manuscript placing surface 2a and is movable in the main scanning direction 8 and the sub-scanning direction 4. , 6f, LEDs 7e and 7f as light emitting elements provided on the hands 6e and 6f, and the moving optical table 1
LED7 is provided for each document size.
e, 7f light is received and electrical detection signals 15g, 15
The light receiving elements 5g, 5h, 5i for converting into h, 15i, and the control unit 16 for determining the reading range of the movable optical table 1 based on the detection signals 15g, 15h, 15i are provided.

Next, the operation of the scanner device according to the present invention will be described.

A document 3 is placed on the document table 2. Then, the pointers 7e and 7f are moved in the main scanning direction 8 and the sub scanning direction 4 to be moved to desired positions. Two pointers 7e and 7f are arranged in the sub-scanning direction, and each of the LEDs 7e and 7f
The light of f is transmitted through the document table 2. Therefore, the light receiving elements 5g, 5h, 5i can output the detection signals 15g, 15h, 15i when they reach the LEDs 7e, 7f.

When the moving optical table 1 starts moving in the sub-scanning direction 4, the light from the LED 7e is first received by the light receiving elements 5g, 5h, 5i.
The light is received by any one of these (the light receiving element 5g in this example), and the light receiving element 5g outputs a detection signal 15g. Then,
The control unit 16 determines the document size (the reading range in the main scanning direction 8) based on the detection signal 15g, and starts the reading of the document 3 within the document size by the moving optical table 1.

When the moving optical table 1 continues to move in the sub-scanning direction 4, the light from the LED 7f is received by the light receiving element 5g, and the light receiving element 5g outputs the detection signal 15g again.
Then, the control unit 16 ends the reading of the document 3 by the moving optical table 1.

As described above, the reading range in the sub-scanning direction 4 is determined by the first detection signal 15g and the next detection signal 15g. In this example, the hatched portion of the document 3 shown in FIG. 1 is treated as an effective image.

Further, the control section 16 outputs a read signal 16j as a read range in the sub-scanning direction 4 and a document size signal 16k as a read range in the main scanning direction 8 to control the reading of the document 3 by the moving optical table 1. To do.

[0018]

As described above, according to the present invention,
A light emitting element is provided on the pointer that can be moved in the main scanning direction and the sub scanning direction, and a light receiving element is provided on the moving optical table corresponding to each document size, and the light emitting element is detected by the light receiving element. By moving the pointer in the sub-scanning direction for the original, the reading range can be set accurately and the size of the placed original can be automatically set.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

FIG. 2 is a side view of an embodiment of the present invention.

FIG. 3 is a plan view of a conventional example.

FIG. 4 is a side view of a conventional example.

[Explanation of symbols]

 1 moving optical table 2 original table 2a original placing surface of original table 2b opposite side of original placing surface of original table 3 original 4 sub-scanning direction 5g, 5h, 5i light receiving element 6e, 6f pointer 7e, 7f LED (light emitting element) ) 8 main scanning direction 15g, 15h, 15i detection signal 16 controller

Claims (2)

[Claims] 1. A document table on which a document is placed and which is light-transmissive, a movable optical table for reading the document with an optical reading element while moving on the document table in the sub-scanning direction, and a document on the document table. Two pointers arranged in the sub-scanning direction on the opposite surface of the mounting surface and movable in the main-scanning direction and the sub-scanning direction, and light-emitting elements provided on each of these pointers,
A plurality of light receiving elements are provided on the moving optical table corresponding to each document size, and light receiving elements for receiving the light of the light emitting elements and converting the light into electrical detection signals, and the moving optical table of the moving optical table based on the detection signals A scanner device comprising: a control unit that determines a reading range. 2. The controller determines the original size of the original based on a detection signal of any one of the light receiving elements according to the movement of the movable optical table, and determines the first detection signal and the next detection signal. 2. The scanner device according to claim 1, wherein the reading range in the sub-scanning direction is determined based on the signal.