JPS58152271A - Conveyor for original of copying machine - Google Patents

Abstract

PURPOSE:To correct the bias feeding of an original without curving the same by providing a correcting roll in the direction approximately at a right angle to the advance direction of the original, and moving either one of the right and left thereof in the direction intersecting with the advance plane of the original. CONSTITUTION:A correcting roll 3 is supported pivotally in parallel with conveying rolls 2 for originals in the rectilinear advancing part for originals where the rolls 2 are disposed. When the biased feeding of an original 1 to, for example, a left side is detected during the conveying, a solenoid 7r on the right side is operated to pull the right side of the roll 3 upward after the preceding end of the original 1 is nipped by the rolls 2 on the discharge side. Then, the left side edge 1l of the original 1 is conveyed as it is, and the right side edge 1r of the original 1 is curved upward and the original 1 is displaced rightward by as much as a difference between the lengths thereof. The bias feeding of the original 1 is corrected by controlling the operation time of the solenoid 7r on the right side according to the deflecting angles of the original 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document feeding device that can correct a skewed document in a copying machine equipped with a document feeding function.

A conventional document conveying device equipped with the above-mentioned document skew feeding correction function was configured as shown in FIGS. 1 and 2, for example.

That is, the document conveyance path is of a U-turn type, and the correction device disposed in the U-turn part includes an outer correction block a whose inner surface is formed into a curved surface with a U-shaped cross section, and an outer correction block a whose outer surface is formed inside the outer correction block a. an inner correction block b that is similar to a curved surface and has a small cross-sectional shape; a connecting block C that maintains a constant gap between the inner surface of the outer correction block a and the inner correction block b; and the outer block a. A rotating shaft d integrally protrudes vertically from the center in the width direction of f, and when the oblique feeding of the original g is detected by a detector such as an optical sensor (not shown) disposed on the forward path side of the U-turn type original transport path,
Either one of the pair of solenoids f operates, the correction block aSb rotates around the rotation axis d, and the moving distance of the left and right edges g, g2 of the document g changes, thereby correcting the oblique feeding of the document g. It is now possible to do so.

However, the document conveying device shown in FIGS. 1 and 2 forcibly bends the document g, which may cause damage to the document g. In addition, if the document g is significantly misaligned or If it deviated to either side of the path, there was a risk that it would get caught in the connecting block C, and furthermore, a system in which the document g was allowed to advance straight was not applicable.

The present invention relates to an improvement of a document conveying device for a copying machine that eliminates such inconveniences, and its purpose is to provide a simple copying structure that can reliably correct skew feeding without curving the document. The main feature is that it provides a document conveying device for the machine.

An embodiment of the present invention illustrated in FIGS. 3 to 8 will be described below.

2 is a document to be copied by a copying machine (not shown), and the document 1 is conveyed in the X direction by a large number of pairs of document conveyance rolls 2 arranged in upper and lower pairs.

In addition, in the document straight-advancing section of the document transport system in which the multiple pairs of document transport rolls 2 are arranged, the upper surface of the correction roll 3 is parallel to the lower roll 2a of the document transport roll 2, and the upper surface of the correction roll 3 is on the same horizontal plane as the upper surface of the lower roll 2a. The pivot shaft 4 of the compensating roll 3 is rotated by the pivot member 5, and the same lever 6 is respectively connected to a movable part (not shown) of a solenoid 7 arranged above, and a tension coil It is biased downward by the spring force of the spring 8, and when one of the left and right solenoids 7 is operated, one end of the correction roll pivot 4 resists the spring force of the tension coil spring 8. can be pulled upwards.

Since the embodiments shown in FIGS. 3 to 8 are constructed as described above, for example, as shown in FIG. If the leading edge of the document 1 is caught by the document transport roll 2 on the delivery side, the right solenoid 7r is detected.
is operated, the right side of the correction roll 3 is pulled upward as shown in FIG. Edge 1
r is curved upward, and the document 1 is deflected to the right by the difference in length.

By controlling the operation time of the right solenoid 7r in accordance with the deflection angle of the document 1, it is possible to align the longitudinal direction of the document 1 with the document transport direction X and correct the oblique feeding of the document.

In the embodiments shown in FIGS. 3 to 8, the skew feeding of the document 1 is corrected by moving either the left or right ends of one correction roll 3 upward, but in the embodiments shown in FIGS. As shown in FIG. 11, many pairs of document transport rolls 2
A feed roll 9 is pivoted parallel to the feed roll 9 in the middle thereof, and a highly flexible correction roll 10 made of sponge rubber is disposed in contact with the feed roll 9, as shown in FIGS. 3 to 8. A correction roll tilting means (not shown) may be attached to the correction roll 10.

Since the embodiments shown in FIGS. 9 to 11 are configured as described above, when the original 1 is fed while being deflected to the left, the embodiment shown in FIGS. To,
When the right end of the correction roll 10 is pressed down, the right edge 1r of the document 1 is closely curved over the circumferential surface of the feed roll 9, and the document 1 is shifted to the right by the difference in length. The skewed feeding of the document 1 is corrected.

Further, in the above embodiment, the amount of elevation of either the left or right end of the correction roll 3.10 is kept constant.
The operation time of either the left or right solenoid was adjusted in response to the magnitude of the deflection angle of . However, while the operation time was kept constant, the amount of vertical elevation of either the left or right end of the correction roll 3, IO was adjusted. It is also possible to use an up-and-down drive means using a pulse motor that is adjusted in accordance with the magnitude of the deflection angle of the original document 1.

In the present invention, as described above, at least one correction roll is disposed in the document straight-advancing section of the document transport system of the copying machine so as to be oriented substantially perpendicular to the direction in which the document travels, and either the left or right side of the correction roll is A means for moving one side in a direction perpendicular to the advancing plane of the original is provided, so that when the original is fed diagonally, the means is operated in accordance with the inclination angle to move the original. If the end of the correction roll on the opposite side is moved in a direction that intersects the traveling surface of the original, the direction of the side edge of the original will match the direction of transport of the original, and the slanted direction of the original will be adjusted. The feed is corrected.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional document conveyance device equipped with a document skew feed correction function, FIG. , FIG. 4 is a plan view of the same embodiment, FIG. 5 is a right side view thereof, and FIG. 6 is a cut along line VI-VI in FIG. 4. FIG. 7 is a front view of the embodiment, FIG. 9 is a plan view of another embodiment, and FIG.
0 is a right side view thereof, and FIG. 11 is a view taken along the line XI-XI in FIG. 9. l... Original, 2... Original transport roll, 3... Correction roll, 4... Pivot, 5... Pivotal support member, 6... Lever, 7... Solenoid, 8...・Tension coil spring, 9...Feed roll, 10...Correction roll. Agent: Patent attorney Nozomi Ehara (1 person) Fig. 7 Fig. 8 Fig. 9 Fig. 10 Fig. 11 n Procedural amendments dated June 1982 (to) Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office 1 Display of the case FIE 1957 Patent Application No. 337922, Title of the invention Copying machine document feeder 3, Relationship with the case of the person making the amendment Patent applicant 4, Representative Yota Kobayashi 6, Inventions increased by the amendment No. 7, subject of correction From page 7, line 7 to page 7, line 8, ``Figure 7 is a front view of the above embodiment, Figure 9 is a plan view of another embodiment.'' Correct as shown below. Record

Claims (1)

[Claims] At least one capture roll is disposed in the document straight-advancing section of the document transport system of the copying machine and is oriented substantially perpendicular to the direction in which the document travels; A document feeder for a copying machine, characterized in that it is equipped with a means for moving the document in a direction intersecting the plane.