JPH04317942A - Information reading device - Google Patents

Abstract

PURPOSE:To allow a single sensor to sense picking-up of two document sheets and opening of a guide element by sensing the displacement amount of a tension roller which presses document sheet to a drive roller. CONSTITUTION:In the case that two document sheets G are picked up when picking-up is conducted with a pickup roller 10, the two document sheets G are introduced to between a drive roller 25 and a tension roller 26 of guide plates 13a, 13b of a transporting means 12, and now the tension roller 26 separates from the drive roller 25 a certain amount more than in usual case, wherein the amount corresponds to the thickness of one document sheet G, and moves to the position b'. The amount of roller 26 movement is sensed by a sensor 30 through the shaft 27 of roller 26 and a lever 31, and two-sheet picking-up is acknowledged. If it is forgotten to shut the guide plate 13a, the tension roller 26 moves to the position (a), wherein the amount of movement is sensed by the same sensor 30 through the shaft 27 of roller 26 and lever 31, and it is known that the guide plate 13a is in opened state.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied as an input device for printers, facsimile machines, etc., and particularly relates to an information reading device for moving originals.

0002

2. Description of the Related Art This type of information reading device includes a document importing section, from which a document is taken in. The captured document is conveyed to the reading section by the conveyance mechanism, and its image is read here.

[0003] By the way, the document taken in from the above-mentioned taking-in section is introduced and guided between a pair of guide bodies that can be opened and closed.

A drive roller for conveying the document is attached to one of the pair of guide bodies, and a tension roller for pressing the document against the drive roller is attached to the other.

[0005] Further, in this information reading device, the guide body includes a detection sensor for detecting the taking of two sheets of a document;
A detection sensor is provided to detect opening of the guide body.

[0006]

[Problems to be Solved by the Invention] However, in the past, a sensor for detecting two sheets of original and a sensor for detecting opening of a guide body were provided separately, which resulted in a large number of sensors and a structural problem. This has the disadvantage of increasing complexity and cost.

Therefore, the present invention uses a single detection sensor,
It is an object of the present invention to provide an information reading device capable of detecting the taking of two sheets of a document and the opening of a guide body.

[0008]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a take-in section that takes in a document, a pair of guide bodies that can be opened and closed to guide the document taken in from the take-in section, and a pair of guide bodies that guide the document taken in from the take-in section. A drive roller is attached to one of the pair of guide bodies to transport the document, and a drive roller is attached to the other of the pair of guide bodies so as to be movable in the direction toward and away from the drive roller. The apparatus includes a tension roller that presses against the roller, and a detection means that detects the taking of a large number of documents and the open state of the guide body by detecting the amount of displacement of the tension roller.

[0009]

[Operation] By detecting the amount of displacement of the tension roller, it is possible to detect the taking of multiple documents and the opening of the guide body with a single detection means.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

FIG. 2 shows an information reading device.
is the main body of the device.

[0012] The upper surface of the apparatus main body 1 has a document receiving section 8.
A document discharge section 9 is provided at the rear side of the document intake section 8 . A take-out roller 10 is provided inside the document take-in section 8 .

Further, a guide 11 and a first conveyance means 12 are provided at the lower part of the document taking-in section 8.

[0014] Furthermore, the guide 11 and the first conveying means 1
A switching gate 15 serving as a switching means for switching the direction of conveyance of the original G is rotatably provided between the first and second conveying means 2, and a second conveying means 16 is connected thereto.

The second conveyance means 16 includes a pair of feed rollers 1
7 and transport belts 18, 18, and is configured to transport the original G to the above-mentioned discharge section 9.

A pair of fluorescent lamps 20, 20 constituting the reading means 19 are disposed between the pair of feed rollers 17 and the conveyor belts 18, 18. These fluorescent lamps 20,
Light is irradiated onto the original G from 20, and the reflected light from the original G is sent to the reading element 22 via a reflection mirror 21 and is received. Information received by the reading element 22 is displayed on a display (not shown).

Next, the first conveying means 12 will be described in detail with reference to FIG.

The first conveying means 12 includes a pair of guide plates 13
a, 13b. The guide plate 13a is provided to be openable and closable, and includes a plurality of drive rollers 25 that rotate forward and backward in the direction of conveyance of the document G.
is installed.

Further, tension rollers 26 are disposed on the guide plate 13b, and these tension rollers 26
... are in rolling contact with the drive roller 25. The tension roller 26 is rotatably attached to a shaft 27, and both ends of the shaft 27 are connected to brackets 28,
It is attached to the guide plate 13b via 28. Slide holes 29, 29 are bored in the brackets 28, 28 in a direction perpendicular to the guide 13b, and both ends of the shaft 27 are slidably inserted into these slide holes 29, 29.

A detection sensor 30 as a detection means is attached to the guide plate 13b, and a lever 31 of the detection sensor 30 comes into contact with the center of the shaft 27, and the tension roller 26... It is designed to detect the amount of displacement.

When reading a large number of originals G, first, the originals G are loaded into the receiving section 8 of the main body 1 of the apparatus. The input documents G are taken out one by one by the rotation of the take-in roller 10 and introduced into the guide plates 13a, 13b of the first conveyance means 12 via the guide 11. The document G is conveyed by the rotation of the drive rollers 25, and is stopped after being conveyed a predetermined distance. Thereafter, the switching gate 15 is rotated to the state shown by the broken line, and the pair of feed rollers 13 are rotated in the opposite direction, so that the document G is fed in the opposite direction and sent out from the rear end side. The sent document G is guided by the switching gate 15 to the second conveying means 16 side and is conveyed by the rotation of the pair of conveying rollers 17, during which it is irradiated with light from fluorescent lamps 20, 20. . Manuscript G
The reflected light is received by the reading element 22 via the reflection mirror 21, and the image is read. The original G whose image has been read in this manner is discharged to the discharge section 9 via the conveyor belts 18, 18. Further, the read image information is displayed on the display.

The operator compares the image displayed on this display with the content of the document G discharged to the discharge section 9, and if there is an error, he operates the keyboard (not shown) to correct the error. Enter your information. This read information is stored in the floppy disk device.

By the way, when the document is taken in by the above-mentioned take-in roller 10, two sheets of the document G may be taken. In this case, the two sheets of the document G are transferred to the drive rollers 2 of the guide plates 13a and 13b of the first conveyance means 12.
5 and the tension roller 26, the tension roller 26 is spaced further apart from the drive roller 25 by the thickness of one sheet of the document G than in the normal case.
It is moved to position b' in FIG. This tension roller 2
The amount of movement of 6 is detected by the detection sensor 30 via the shaft 27 and lever 31, and the taking of two sheets is detected.

Note that when only one document G passes through, the tension roller 26 moves to position b.

When it is detected that the above-mentioned document G is taken out in two sheets, the guide plate 13a is rotated and opened, and the document G is taken out, as shown in FIG. After taking out the original G, the guide plate 13a is closed again.

If you forget to close this guide plate 13a, the tension roller 26 moves to position a in FIG. 3. This amount of movement is determined by the tension roller in the same way as described above.
This is detected by the detection sensor 30 via the shaft 27 of the roller 26 and the lever 31, and it is detected that the guide plate 13a is in the open state.

[0027]

[Effects of the Invention] As explained above, according to the present invention,
With a single detection means, it is possible to detect the taking of a plurality of documents and the open state of the guide plate, which has the effect of simplifying the structure and reducing costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a document conveyance mechanism that is an embodiment of the present invention.

FIG. 2 is an overall configuration diagram showing an information processing apparatus including the document transport mechanism of FIG. 1;

FIG. 3 is a side view showing the document conveyance mechanism in FIG. 1;

[Explanation of symbols]

8... Take-in part, 13a, 13b... Guide body, 25... Drive roller, 26... Tension roller, 30... Detection means.

Claims (1)

[Claims] Claim 1: A capture unit that captures a document, a pair of guide bodies that can be opened and closed to guide the document captured from the capture unit, and a drive roller that is attached to one of the pair of guide bodies and that transports the document. - a tension roller which is attached to the other of the pair of guide bodies so as to be movable toward and away from the drive roller and presses the document against the drive roller; 1. An information reading device comprising: a detection means for detecting a plurality of sheets of the document and an open state of the guide body by detecting a displacement amount of the document.