JPH04245855A - Original reader - Google Patents

Abstract

PURPOSE:To accurately read an original by a read sensor even if the original is carried in an oblique state by rotating read sensor roller when the tip end of the original carried by means of a feed roller reaches the read sensor roller. CONSTITUTION:When the original is inserted into the original carry-in side of an original read carry line 2, the tip end of the original is detected and the feed roller 6 provided on the original carry-in side of the carry line 2 is rotated. The read sensor roller 8 confronted with the read sensor 7 arranged on the inner side of the roller 6 is rotated and the tip end of the original carried by the roller 6 is read by the sensor 7 and it is carried out. Since the read sensor roller is stopped even if the original is in the oblique state and it is carried in by the feed roller 6, the original is corrected in parallel as against a read direction, the read sensor roller 8 is rotated and the original is accurately read by the sensor 7. Thus, the original is prevented from being clogged.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading device used in, for example, a facsimile machine.

0003

2. Description of the Related Art In a conventional document reading device of this type, when a document is inserted into a document conveyance path, a document detection sensor detects the leading edge of the document, and a feed roller and a reading sensor roller facing the reading sensor detect the leading edge of the document. The document is rotated at the same time, the document is conveyed through the document conveyance path by a paper feed roller, the document is read by being pressed against a reading sensor by a reading sensor roller, and the document is sent out from the conveyance path.

0004

[Problems to be Solved by the Invention] In the document reading device having the above-mentioned conventional structure, even if the document is fed into the conveyance path in a skewed state, it is conveyed as is, resulting in inaccurate reading by the reading sensor, or There was a problem that caused it to get clogged.

The present invention has been developed in view of the above-mentioned problems, and even if the document is fed into the conveyance path in a skewed state, the reading sensor roller corrects the original to be parallel to the reading direction and conveys it, so that the document is not detected by the reading sensor. To provide a document reading device which can reliably read documents and carry them out, and which prevents documents from getting jammed.

[Configuration of the invention]

[0007]

[Means for Solving the Problems] The document reading device of the present invention includes a paper feed roller disposed on the document input side of a document reading conveyance path, and a reading sensor disposed inside the paper feed roller facing a reading sensor. a sensor roller, which detects a document inserted into the document reading conveyance path and rotates the paper feed roller, and when the leading edge of the document carried in by the paper feed roller reaches the reading sensor roller; The reading sensor roller is rotated.

[0008]

[Operation] In the document reading device of the present invention, when a document is inserted into the document input side of the document reading and conveying path, the leading edge of the document is detected and the document feeder disposed on the document loading side of the document reading and conveying path detects the leading edge of the document. The roller is rotated, and the leading edge of the document conveyed by the paper feed roller comes into contact with a reading sensor roller disposed inside the paper feeding roller and facing a reading sensor. In this state, the reading sensor roller is rotated, and the original is read by the reading sensor and conveyed out. Even if the original is carried in by the paper feed roller in a skewed state, the reading sensor roller is stopped, so the original is corrected to be parallel to the reading direction, and then the reading sensor roller is rotated, and the original is read. The sensor reads the document accurately and the document will not get jammed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be explained with reference to the drawings.

Reference numeral 1 denotes a facsimile machine, and this machine body 1 is provided with a document reading and conveying path 3 that communicates with a document insertion slot 2 formed on the top surface. A document leading edge detection sensor 5 for detecting the leading edge of the document 4 is disposed on the loading side of the document loading path 3. A paper feed roller 6 is rotatably provided adjacent to the document leading edge detection sensor 5 and facing the conveyance path 3.
It is rotated by the document detection operation of , and the document 4 is conveyed.

The machine body 1 also includes a reading sensor 7 located inside the paper feed roller 6 and facing the conveyance path 3, and a reading sensor roller 8 that is rotatable opposite to the reading sensor 7. It is provided. A document end detection sensor 9 is provided on the input side of the conveyance path 3 in close proximity to the reading sensor roller 8.
The reading sensor roller 8 is rotated after a time elapses from when the leading edge of the document 4 is detected to when the leading edge of the document reaches the feed amount until the leading edge of the document comes into contact with the reading sensor roller 8. Then, by the rotation of the reading sensor roller 8, the original 4 is read by the reading sensor 7 and discharged from the conveyance path 3. Note that the reading sensor 7 is attached to a frame 10.

Further, a pad 11 is provided near the inner side of the document insertion opening 2 of the conveyance path 3 to restrict feeding of the document 4 one by one.

Further, the contents read by the document reading sensor 7 are transmitted by a transmitting device (not shown).

Next, the operation of this embodiment will be explained.

When the original 4 is inserted into the original entrance 2 of the original reading transport path 3, the leading edge of the original 4 is detected and the paper feed roller 6 disposed on the original transport side of the original reading transport path 3 is moved. The original 4 rotated and conveyed by the paper feed roller 6
The leading edge of the paper feed roller 6 comes into contact with a reading sensor roller 8 facing the reading sensor 7 while being detected by a document end detection sensor 9 disposed inside the paper feed roller 6 . Then, when a set time has elapsed since the end of the document was detected by the document end detection sensor 9, the reading sensor roller 8 is rotated.
The original 4 is read by a reading sensor 8 and transported out. Even if the original 4 is carried in by the paper feed roller 6 in a diagonal state, the reading sensor roller 8 is stopped, so the leading edge of the original 4 is brought into contact with the circumferential surface of the reading sensor roller 8, and the original 4 is is corrected parallel to the reading direction, and the reading sensor roller 8 is rotated in this state. When the end of the final document 4 passes the position of the reading sensor 9, the paper feed roller 6 and the reading sensor roller 8 are stopped after a period of time corresponding to the amount of the document being transported is elapsed.

In the above embodiment, a facsimile document reading device has been described, but the present invention is not limited to facsimiles and can be applied to various document reading devices.

[0017]

According to the present invention, when a document is inserted into the document input side of the document reading and conveying path, the leading edge of the document is detected and the document feeder disposed on the document loading side of the document reading and conveying path detects the leading edge of the document. The roller is rotated, and the leading edge of the document conveyed by this paper feed roller comes into contact with a reading sensor roller disposed inside this paper feeding roller and facing the reading sensor, and in this state, the reading sensor roller is rotated. , the original is read by a reading sensor and then transported out, so even if the original is brought in by the paper feed roller in a skewed state, the reading sensor roller is stopped, so the original is corrected to be parallel to the reading direction. The reading sensor roller is rotated after
The original is read accurately by the reading sensor, and the original does not get jammed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a document reading device showing an embodiment of the present invention.

FIG. 2 is a partially exploded perspective view of the same as above.

FIG. 3 is a side view of the document leading edge detection sensor.

FIG. 4 is a side view of the document end detection sensor same as above.

[Explanation of symbols]

2 Original reading conveyance path 4 Manuscript 6 Paper feed roller 7 Read sensor 8 Reading sensor roller

Claims (1)

[Claims] 1. A paper feed roller disposed on the document input side of the document reading and conveying path, and a reading sensor roller disposed inside the sheet feeding roller and facing a reading sensor, the document reading and conveying path having a The paper feed roller is rotated upon detecting the inserted document, and the reading sensor roller is rotated when the leading edge of the document carried in by the paper feed roller reaches the read sensor roller. Manuscript reading device.