JPS60161850A - Device for correcting skewing of document - Google Patents

Abstract

PURPOSE:To correct a circulating document in a right condition accurately and quickly by disposing a sensor on the preceding process side of a correcting roller, thereby to detect the inclination and biasing of a document and displacing the correcting roller according to the detection result. CONSTITUTION:In the case where the right-hand part of a document 6 in the transport direction is advanced so that the document is biased, a sensor 21 detects the inclination and the biasing + S of the document 6. The detection signal is transmitted to a solenoid 20, and the solenoid 20 is excited, so that a correcting roller 8 is pivotally displaced in the same direction of the more advancing leading end side of the document by the biasing + S. Thus, the more advanced part of the document 6 passes a longer path and the delayed part thereof passes a shorter path. When the document is reversed, the leading end of the document is arranged orthogonal to the transport direction to reduce inclination to zero.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for correcting skew feed of a document in a copying machine, and more specifically, a drive roller that conveys a document at a speed of i''; This invention relates to an improvement in a document skew feed correction device that corrects the deviation of a document in an appropriate state in a document circulation path, which is composed of at least two or more pairs of driven rollers facing the drive roller. .

[Prior art]

In a copying machine that copies a document while repeatedly conveying it in circulation, the document inserted from the document table is usually guided by a document guide or the like, but it is not inserted completely straight. In addition, while the original is repeatedly circulated in the circulation path of this type of copying machine, it is possible that due to differences in the stroke length of the circulation path, resistance differences in the path, or nip pressure differences between the driven rollers, etc. It is normal for the original to gradually shift from side to side, become tilted, and become curved, and in the worst case, it ends up extending beyond the copy paper, significantly reducing the value of the copy. Put it away.

Therefore, in the past, attempts have been made to solve the above problem by detecting that the document is tilted beyond a certain range (beyond a certain range) and ejecting it from the machine during the copying process, or by limiting the number of copies. However, this method causes some inconvenience to the performance of the machine and is not fully satisfactory (2.
Improvements are desired (at present).

[Purpose of the invention]

The present invention was developed in view of the above circumstances, and even when the original is circulated repeatedly, regardless of the quality, size, thickness, etc. of the original, one draft is always kept in the conveying direction (two right angles). The present invention aims to provide a document skew feed correction device for a copying machine which is capable of automatically correcting the skew of a document.

[Structure of the invention]

That is, the gist of the present invention is to provide a document circulation path consisting of at least two pairs of driving rollers and driven rollers (at least one pair of driving rollers and driven rollers). Consisting of a correction roller and a driven roller that change the document circulation path length by 01
The correction roller is equipped with a sensor that detects the deviation of the document on the process side, and the sensor is connected to a control device for the correction roller. The present invention relates to a document skew feed correction device characterized in that the detected document deviation A≦jI is sent to a control device, and the correction roller (second) corrects the document to a proper state.

〔Example〕

Embodiments of the skew feed correction device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic plan view showing a document circulation device equipped with the skew feed correction device of the present invention, and FIG. 2 is a side sectional view thereof. A plurality of solid rollers (for example, made of chloropreso rubber, etc.)
Drive rollers (5, 5) having foaming rollers (4) that are in contact with the top and bottom of each solid roller (2) of this drive roller (3). The transport section (which transports the document (6) while sandwiching it in pairs with the
7) are arranged in at least two pairs (four pairs are shown in the drawing), and at least one pair of drive rollers (3) and driven rollers (5+5) on one side of the rollers are used to circulate the original. It is composed of a correction roller (8) that changes the path length and driven rollers (5, 5). In this case, the shaft (1) of the driving roller (3) and the shaft (9) of the driven roller (5) are spaced (
It is constructed so that it can rotate twice. On the other hand, the correction roller (8)
The shaft (11) of the shaft (11) and the shaft (9, 9) of the driven roller (5, 5) paired with this correction roller (8) are connected to the frame (
10) so as to be rotatable and pivotally movable along the conveyance direction of the original (6). That is, the eighth
As shown in the figure (2, for example, shaft tn), (9, 9) is rotatably supported by a bearing (12), and the bearing (12) is pivotally supported by a pivot pin (13). By this, the correction roller (8) and the driven roller (5, 5)
can be oscillated along the conveyance direction of the document (6). Also, these axes (Ill, (9,9)
The other side is a fixing plate (a fixing bottle 06 that is fixed through the land and protrudes from the frame (10) into an elongated guide hole (15) drilled in the fixing plate (14)). (by fitting the two, the correction roller (8) and the driven rollers (5, 5) are capable of swinging displacement b'' as described above (see Fig. 4). ), (9,9
) is also provided with another fixing plate (14) on the pivot side facing the fixing plate (14).
141 is attached, and these fixed plates (1 hand,
14') between the correction roller (8) and the original (6).
An arc-shaped guide F plate a'71 that maintains a constant interval through which the
has been erected.

Shaft (11) of correction roller (8) configured as above
and the drive shaft (on the same side as the drive roller (3))
The ends of the drive bells 1, .
and drive rollers (3, . . . ) are rotated in the same direction, that is, counterclockwise in FIG. In addition, at the swinging end of the shaft (11) of the correction roller (8),
A solenoid (support) which is a control device that controls the swinging displacement of the correction roller (8) is provided. This solenoid (5)) is connected to the correction roller (5) in the document circulation path.
8) Pre-process side (two sensors (2), 21
) The correction roller (8) can be oscillated in order to correct the deviation of the original (6) in response to the deviation detection signal of the document (6). The sensors (21, 21) are arranged at symmetrical positions with respect to the conveyance center line (A) of the original (6),
When the original (6) passes, the mechanism calculates the time difference between the left and right sides and detects the occurrence of tilt of the original (6). Note that 2) is the document insertion table.

” In the correction device of the present invention configured as described in Section 2,
If the original (1) moves to the right side along the general feeding direction and deviates as shown in Fig. 5(a) (2), the sensor (2)
1゜21) detects its inclination and deviation amount (→S), and the signal is transmitted to the tilt 7 noid (20), which causes the solenoid (20) to move the document (6) toward the leading edge. bias the correction roller (8) in the same direction by the same amount (+S)
oscillating displacement. Therefore, the one that is ahead of the document (6) will take the long path, and the one that is behind will take the short path, and when it is reversed, the leading edge of the document will be aligned at right angles to the transport direction to make the inclination zero. can do. On the other hand, as shown in FIG. 5(b), the manuscript (6) is
Even if the left side in the conveyance direction moves and deviates, the sensor (2
],, 21), the inclination and deviation (-3) are detected, and the signal is transmitted to the solenoid (20),
The correction roller (8) is biased @(S
), the inclination of the leading edge of the document can be corrected to zero.

In addition, in the embodiment described above, the case where only one correction roller (8) is used, but the correction roller (8) having the same function may be used.
8) and sensors (21, 21), it is of course possible to perform more accurate correction.

〔Effect of the invention〕

As described above, according to the skew feed correction device of the present invention, at least one pair of the drive roller and the driven roller constituting the document circulation path is replaced by the correction roller and the driven roller that eclipse the length of the document circulation path in one month. In addition, a sensor for detecting the deviation of the original is disposed on the pre-process side of the correction roller, and the sensor and the opening side device of the correction roller are connected, so that the inclination of the original during the original circulation path can be detected. The amount of deviation is detected by a sensor, and the correction roller is displaced via the control device to correct the circulating original to an appropriate state (2).Moreover, a simple mechanism allows accurate and quick correction. Its utility value is remarkable because it can provide excellent effects such as being able to say things like "J".

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a document circulation device having a skew feed correction device according to the present invention, FIG. 2 is a side sectional view thereof, and FIG. 3 is a cross-sectional perspective view of a pivot side mounting portion of a correction roller according to the present invention. Figure 4 is a side view of the displacement side mounting part of the correction roller, Figure 5 (
) and (b) are explanatory diagrams each showing a state of bias correction of a document. Explanation of symbols (1)... Drive M (2) --- Solid roller (3)... Drive roller (4)...
... Foaming roller (5) ... Driven roller (
7)... Conveyance section (8)... Correction roller (9)... Driven roller shaft (10)...
・Frame (11)...Correction roller shaft (12)
)...Bearing (13)...Pivot pin (
1, 4, 14')...Fixing plate (15)...
・・Guide hole (16)・・Fixed bottle (17+
−...Guide plate (18)...Drive bell) +
19+...Drive motor■)...Solenoid (control device) (2I)...Sensor Patent applicant Fuji Zero No Kunu Co., Ltd. Agent Tomohiro Donakamura Patent Attorney Katsuo Naruse No. Figure 1 Figure 2 (a) -12

Claims (1)

[Claims] In a document circulation path consisting of at least two pairs of driving rollers and driven rollers, C1 at least one pair of the driven rollers such as the driving roller is replaced by a correction roller and a driven roller that change the document circulation path length El. At the same time, a sensor for detecting the deviation of the original is arranged on the pre-process side of the compensation roller, and the sensor and the opening side 1 device of the correction roller are connected to A skew feed correction device for a document, characterized in that the deviation is corrected to an appropriate state using a correction roller.