JPS63127954A - Feed straightening mechanism for original - Google Patents

Abstract

PURPOSE:To straighten an original to right form even if it is inset obliquely, by rotating a feed roller at once when detecting a fact that the original uniformly collides with the feed roller is detected by a sensor, and feeding the original, in case of a facsimile or the like. CONSTITUTION:When an original 1 is inset obliquely, it receives straightening direction turning force by a peripheral speed difference between the large diametral side 7a and the small diametral side 7b of a conical roller 7 and similar counter straightening direction turning force of a conical roller 7', but at the outset, contact length at the oblique inserting side is larger so that the original 1 is straightened of its inserting direction. Under this state, these conical rollers 7 and 7' are further rotated, the original 1 collides with a feed roller 3 and thereby further straightened, and when a uniform collision is detected by each sensor 8 at both ends, the original 1 is conveyed by these conical rollers 7 and 7' and the feed roller 3. Thus, supposing that the original is inset obliquely, it is straightened into a rightful position, so that no hindrance is exerted on the subsequent such as reading or the like.

Description

[Detailed Description of the Invention] [Summary] Two conical rollers are placed at the insertion opening of the conveyance path, with their large diameter sides facing each other, so that they can float freely so as to press down on the document with their own weight, and are perpendicular to the conveyance direction. Furthermore, a feed roller and a sensor for detecting the state of the document are provided parallel to the conical roller at a predetermined interval, and the document is inserted diagonally depending on the difference in circumferential speed of the rotating conical roller. The document is rotated in the opposite direction, and then the protruding edge of the document hits the stopped feed roller and rotates once. When the sensor detects that the document hits the feed roller evenly, the feed roller is rotated. Then, I sent the manuscript.

[Industrial application field]

The present invention relates to a reading device for reading a moving document in a facsimile machine or the like, and more particularly to a structure for correcting the feeding of the document.

(Prior Art) As shown in the perspective view of FIG. 5, a reading device to which the present invention is applied is composed of a feeding section and a reading section. is composed of an optical system 4, a reading element 5, and an illumination means 6 such as a fluorescent tube.

The document 1 is correctly inserted into the conveyance path 2, and is fed between the document 1 and the conveyance path 2 by the rotation of the feed roller 3, and is conveyed.

For reading, the original document irradiated by the illumination means 6 is transported and read by the reading element 5 via the optical system 4.

[Problem that the invention seeks to solve]

Due to the structure described above, if a document is inserted diagonally, it will be fed diagonally, which not only prevents it from being read correctly, but also causes jams, which can lead to unreadable documents and damage to the document. .

[Means for solving problems]

FIG. 1 is a plan view of a document feeding correction mechanism according to the present invention.

In the present invention, two conical rollers 7.7'' are installed at the insertion end 2a of the conveyance path 2 so that their large diameter sides face each other at the center of the conveyance path 2, and the rollers 7.7'' are configured to press down the original 1 with their own weight. A feed roller 3 and a sensor 8 for detecting the state of the document l are provided so as to be floating freely and perpendicular to the feeding direction of the document 1, and are arranged in parallel with the conical roller 7.7'' at a predetermined interval. A feed roller 3 is provided, which rotates the diagonally inserted original l in the opposite insertion direction based on the difference in circumferential speed of the rotating conical roller 7.7'', and then stops the protruding tip of the original 1. When the sensor 8 detects that the leading edge of the document has evenly abutted against the feed roller 3, the feed roller 3 is immediately rotated to feed the document 1.

[Effect]

The inserted document is corrected in its correct orientation by the difference in circumferential speed of the conical rollers and the moment generated by hitting the feed roller.

〔Example〕

1 to 4 show an embodiment of the present invention.

Identical parts are designated by the same reference numerals throughout the figures.

As shown in the plan view of FIG. 1 and the front view of FIG.
Two conical rollers 7 and 7° are installed at the insertion end 2a of the conveyance path 2.
are provided so as to be perpendicular to the feeding direction of the original 1, with their respective large diameter sides 7a and 7a'' facing each other at the center of the transport path 2, and mounted so as to be freely floating so as to press down the original 1 with their own weight. It is being

That is, the rotating shafts 7C of the conical rollers 7 and 7' are on the large diameter side 7.
A and 7a'' and small diameter sides 7b and 7b' are mounted in engagement with vertical elongated holes 9a and 9b of metal fitting 9, and are in contact with conveyance path 2 by gravity, so that they can freely float in the direction of gravity.

The rotation shaft 7C on the small diameter side 7b and 7b'' has a second
As shown in the side view of FIG.
a is installed, and the timing pulley 1 on the motor 12a side
0b and is connected by a timing belt 11.

The timing bell 1 becomes loose due to the floating of the conical rollers 7 and 7', and is biased in the direction of arrow A by a tension roller 13 as shown in FIG. 3 in order to prevent slipping.

The rotation of the motor 12a is caused by the rotation of the shaft 1 as shown in FIG.
4 and is configured to be simultaneously transmitted to the left and right conical rollers 7 and 7'.

Furthermore, as shown in FIG.
1 and parallel to the conical roller through the arrow at a predetermined distance,
In addition, a feed roller 3 is provided so as to be in contact with the conveyance path 2,
It is configured to be rotated by a motor 12b separate from the conical rollers 7 and 7'.

For example, a reflective optical sensor 8 is provided under the feed roller 3.
is provided as shown in the figure, and detects the leading edge of the document 1 being fed.

The operation will be explained below with reference to the operation diagram shown in FIG.

When the original l is inserted diagonally as shown in Figure (a),
At the contact point B between the conical roller 7 and the document 1, the peripheral speed is b, and at the contact point C, the peripheral speed is C.

Therefore, since the circumferential speed b>c, the document 1 is transferred to the conical roller 7.
It starts rotating in the direction of arrow E about the virtual center of .

When the document 1 rotates and reaches the state shown in FIG. 2(b), the left conical roller 7' also moves to the virtual center F as in FIG.
The document 1 is attempted to be rotated in the direction of arrow G around .

However, the contact length between the original 1 and the conical rollers 7 and 7'' is 7! , and LL are 2. >4. Therefore, the original l rotates in the direction of arrow E around the virtual center.

When the contact length arrows IR and 1L of the document 1 become equal as shown in FIG.
move in the direction of

The moved original 1 hits the stationary feed roller 3 with its protruding end 1a, as shown in FIG.

In this state, when the conical rollers 7 and 7 are further rotated,
The document 1 moves in the direction of the arrow M centered on the point H where it collides with the feed roller 3.
As shown in the same figure, the end uniformly hits the feed roller 3 as shown in the figure.

This collision state is detected by the sensors 8 at both ends,
Simultaneously with the detection, the conventional motor 12a and motor 12b are driven to transport the original 1 in the direction of arrow J using the conical rollers 7 and 7' and the feed roller 3.

Therefore, even if the original 1 is inserted diagonally, it is corrected by the feed roller 3, fed in the correct form, and read correctly by the reading section.

In the above description, the case where the document 1 is tilted to the right has been explained, but even if the document 1 is tilted to the left, the document 1 can be corrected in the same manner.

〔Effect of the invention〕

As explained above, by applying the document feed correction mechanism of the present invention to a facsimile reading device, etc., even if the document is inserted diagonally, it will be corrected to the correct shape, and subsequent processing such as reading will be corrected. There will be no hindrance, etc.
It has a great effect on industry.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the document feed correction mechanism of the present invention, FIG. 2 is a front view of the document feed correction mechanism of the present invention, FIG. 3 is a side view of the document feed correction mechanism of the present invention, and FIG. The figure is an explanatory diagram of the operation of the document feeding correction mechanism of the present invention, and FIG. 5 is a perspective view of a reading device to which the present invention is applied. In the figure, 3 is a feed roller, 7.7' is a conical roller, 7
a, 7 al are large diameter side, 7b, 7b' are small diameter side, 7
C is the rotation axis, 8 is the sensor, 9 is the mounting bracket,
9a and 9b are long holes, 10a and 10b are timing pulleys, 11 is a timing belt, 12a and 12b are motors, 1
3 is a tension roller, and 14 is a shaft. Fu2Kinji3Mafu44 (α) (C) (,=)

Claims (1)

[Scope of Claims] A document feed correction mechanism for correcting the feeding of a document (1) inserted into a conveyance path (2) to a correct posture, the document feed correction mechanism comprising: Book conical roller (7, 7
') with their respective large diameter sides facing each other at the center of the conveyance path (2), floating freely so as to press down the document (1) with their own weight, and perpendicular to the feeding direction of the document (1). Further, a feed roller (3) is provided parallel to the conical roller (7, 7') at a predetermined interval, and a sensor (8) for detecting the state of the document (1), The document (1) inserted obliquely is rotated in the opposite insertion direction by the difference in circumferential speed of the conical rollers (7, 7'), and then the protruding tip of the document (1) is rotated. The original document (1) rotates against the stopped feed roller (3), and the sensor (8) detects that the original document (1) hits the feed roller (3) that has stopped.
3) A document feed correction mechanism characterized in that the feed roller (3) is rotated to feed the document (1) as soon as it is detected that the document (1) evenly hits the document.