JP2845741B2 - Facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus, and more particularly to a facsimile apparatus of a contact image sensor reading type capable of correcting a skew of a document.

[0002]

2. Description of the Related Art Conventionally, in a facsimile apparatus, a document is fed by a single feed roller, and a guide for preventing skew of the document is provided in a document setting section to prevent skew of the document. The skew of the document has a great influence on the contact image sensor in the main scanning direction due to a large displacement of the traveling direction of the document.

[0003]

In this conventional facsimile apparatus, a document once skewed advances while being skewed, and the reception screen is skewed, the document cannot be transmitted due to lack of the edge of the document, and further skew occurs. When the line becomes bad, there is a problem that a document jam occurs.

[0004] It is an object of the present invention to solve the above-mentioned problems,
It is an object of the present invention to provide a facsimile apparatus capable of correcting skew of a document, and fundamentally suppressing the inclination of a reception screen, the inability to transmit an end of the document, and the occurrence of jamming of the document.

[0005]

A facsimile apparatus according to the present invention is a facsimile apparatus for reading an original fed by a feed roller by a contact image sensor. The facsimile apparatus contacts the running original and rotates in the main scanning direction of the original. A skew amount detecting means including a first sphere sensor for detecting the skew amount as a deviation, and correcting the skew amount without contact in the sub-scanning direction so that the skew amount becomes zero by contacting the original while traveling. And a skew amount correcting unit including a second sphere sensor.

Further, the facsimile apparatus of the present invention has a configuration in which the first sphere sensor and the second sphere sensor are respectively disposed before and after the center of the feed roller and in contact with the original.

[0007]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention.

In this embodiment, a document fed by a feed roller is contacted with a contact image sensor.
An example of a facsimile apparatus that reads an original with an image sensor is a feed roller 2 for feeding an original (not shown) in the sub-scanning direction (running direction) and a feed motor 1 for rotating the feed roller. A detection sphere 3 as a first sphere sensor used in combination with a stepping motor, which is disposed in front of (upstream in the traveling direction) and rearward (downstream in the traveling direction) abutting on the document, and acquired by the detection sphere 3 An encoder 4 for digitizing the skew amount of the original to be read, a memory 5 for storing the output of the encoder 4, and a feedback control circuit 6 for outputting a correction signal 601 for setting the skew amount 501 of the original stored in the memory 5 to zero. And a correcting sphere as a second sphere sensor combined with a stepping motor for correcting skew of the original in response to the correction signal 601 8 and a driving mechanism 7 for driving the correcting sphere 8.

Next, the operation of this embodiment will be described.
A feed motor 1 is driven to rotate a feed roller 2 to feed a document (not shown). While being pressed against the feed roller 2 by the rotating feed roller 2, the document travels in the traveling direction indicated by A (sub-scanning direction). The detecting sphere 3 is arranged close to the upstream of the midpoint of the feed roller 2 and abuts on the original, and the correction sphere 8 is arranged close to the downstream of the midpoint of the feed roller 2 and pressed against the original. Is established. The detection sphere 3 outputs the displacement of the rotor of the sphere rotated on the plane as analog values of X and Y coordinates. Regarding the analog values of the X and Y coordinates, the X coordinate value corresponds to the main scanning direction value, and the Y coordinate value corresponds to the sub scanning direction value, that is, the traveling direction value of the document. When the original is running normally and is not skewed, the rotation of the detection sphere 3 continuously abuts on a substantially constant position on the original and outputs a substantially constant coordinate value. When the document is skewed, the rotator is relatively rotated, so that a value corresponding to the skew amount is output.

The encoder 4 encodes the skew amount detected by the detecting sphere 3 and accumulates the skew amount in the memory 5 at predetermined sampling times.

A feedback control circuit 6 has a built-in CPU and inputs a skew amount 501 as a digital skew amount for each predetermined sampling time read from the memory 5 and cancels the skew amount 501 to cancel the skew amount. Is sent to the driving mechanism 7 to make the value of.

The driving mechanism 7 receives the correction signal 601 and drives the correcting sphere to move the abutting original so as to cancel the skew amount.

The correction sphere 8 has a rotator that comes into contact with the original, and this rotator is rotated by the correction signal
A force that makes the skew amount zero is applied to the abutting document, and thus the skew amount is corrected under the control of the feedback system.

[0015]

As described above, according to the present invention, the skew amount of the original fed in the facsimile apparatus is detected by the detecting sphere, and the correcting sphere is driven so that the skew amount becomes zero. As a result, it is possible to prevent the document from being jammed due to skew and the document from being damaged, and to prevent the reception image from being chipped or skewed due to the document being out of the reading width.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 feed motor 2 feed roller 3 detection sphere 4 encoder 5 memory 6 feedback control circuit 7 drive mechanism 8 correction sphere

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁶ , DB name) H04N 1/04-1/207 G03G 15/00 107 G03G 15/00 510-15/00 534 B65H 7/06 B65H 43/04

Claims (2)

(57) [Claims] 1. A facsimile apparatus in which a document fed by a feed roller is read by a contact image sensor, wherein a skew amount as a shift in the main scanning direction of the document in the main scanning direction is detected by rotation while contacting the document while traveling. A skew amount detecting means including one sphere sensor; and a skew amount including a second sphere sensor which abuts on the original during traveling and corrects the skew amount without influence in the sub-scanning direction. A facsimile apparatus comprising a correction unit. 2. The apparatus according to claim 1, wherein the first sphere sensor and the second sphere sensor are disposed before and after a center of the feed roller and in contact with the document. Facsimile machine.