JPS58109344A - Paper true-up device for copier - Google Patents

Abstract

PURPOSE:To prevent the jamming of paper even if it is conveyed in while being protruded outwards from a side registration guide, by providing an oblique roller different in circumferential velocity between both the ends and by using the roller to separate the paper from the side registration guide and thereafter truing up the paper. CONSTITUTION:An oblique roller 6 provided at the side of convey-in of paper 2 has a higher circumferential speed on the end at the side of a side registration guide 5 than on the other end. The roller 6 has a prescribed oblique angle of alpha to the direction of conveyance of the paper 2. A true-up roller 10 is provided behind the oblique roller 6 so that the paper 2 separated from the guide 5 is moved toward the guide. After the paper 2 is carried in, the paper is conveyed by the oblique roller 6 in a direction to go away from the guide 5 and the front end of the paper 2 reaches the true-up roller 10. The paper 2 is pulled toward the guide 5 by the true-up roller 10 and one edge of the paper is brought into contact with the guide so that the paper is trued up. Even if the paper 2 is carried in while being protruded outwards from the guide 5, the paper is pulled inwards by the oblique roller 6 and thereafter trued up by the roller 10. For that reason, the paper is prevented from jamming and wrong truing-up is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper alignment device for a copying machine for registering one side of paper to a fixed position.

2. Description of the Related Art Conventionally, double-sided copying machines have been provided with an alignment device for aligning one side of a sheet by a certain amount tK when one-sided copying is completed and a companion sheet is fed again. For example, as shown in FIG. 1H), this alignment device is set at an alignment position, and includes a conveyance roll b that approaches the nine-side registration guide a in sequence, and a roll d that presses the conveyance roll bK against the paper C. As a precaution, paper C carried in from the direction of arrow e is successively brought to the side registration guide section side by transport rolls b and rolls d, and is aligned when one side abuts side registration guide a. It has become so. However, in the above-mentioned conventional alignment device, as shown in No. 1-(B), when one side of the paper C is aligned (by the side registration guide), the paper C
There was a problem in that the paper running width 9t increased because the trailing edge swung greatly in the direction away from the side registration guide.

This invention has been made to solve this problem, and uses diagonal rolls with different circumferential speeds at both ends to move the paper in front of the side registration guide in a direction away from the side registration storage guide. To provide a paper aligning device for an optical copying machine, which allows paper to be aligned to a fixed position with a small paper travel width without causing a paper jam even if the paper is carried in with the paper protruding outward from the side registration guide. This is what I did.

Hereinafter, one embodiment of the present invention will be described in detail according to the second embodiment shown below. In the figure, reference numeral 1 denotes the main body of this apparatus installed near the duplex copying tray of a duplex copying machine (not shown).
An inclined surface 3 that slopes downward at the end 11 of the sheet 2 in the carrying direction.
The lower chute 3 has a flat plate-like lower chute 3 having a diameter of 1.5 mm, and an upper chute 4 that is parallel to the upper chute 3 of the mosquito lower chute 3 with a gap therebetween. A side registration guide 5 is bent along the conveyance direction, and a diagonal roll "6" is provided on the paper input side of the upper and lower chute 4.3.

The diagonal roll 6 has a conical shape in which the side registration storage cylinder 56 has a large diameter and the opposite side has a small diameter, and is inserted into the through hole 31 of the lower chute 3 so that -m protrudes from the upper surface of the lower chute 3. A rotation axis 6 is provided and inclined at an angle α with respect to a line 7 perpendicular to the conveyance direction of one sheet 2.
One end of the shaft is connected to a drive system (not shown) via a universal joint 8, and is rotated by the drive system. Further, a pinch roll 9 is provided above the skew roll 6 so as to be in circumferential contact with the skew roll 6. The bearing folded up from the W chute 4 on the above pinch roll 9 Fi is the piece 4a.
A shaft s9m is supported on the shaft s9m, and is configured to be rotated together with the oblique roll 6.

Two sets of alignment rolls 10 are provided behind the skew rolls 6 and located at the center of the upper shade 4. These alignment rolls 1° are used to bring the paper 2, which has been moved in the direction away from the side registration guide 5 by the skew roll 6, to the side registration guide 5 again, and are provided on the lower chute 3 side and rotate. The shaft 10m connects to the drive system #C (not shown) via the universal joint 11.
The connected drive a-role lob, the pinch roll log provided on the upper chute and in circumferential contact with each drive roll 10b, and the rotation axis log of the drive roll job
The rotating shafts 10d of the pinch rolls 10c are each inclined at an angle α in a direction opposite to the skew roll 6 with respect to a line 8 perpendicular to the paper conveyance direction.

However, one side has already been copied and the two-sided copy tray (
When the reminder paper 2 stored in the paper (not shown) is fed again and reaches the front of the main body 1 of the apparatus (1st 5th factor a), it is first transferred between the skew roll 6 and the pinch roll 9 (41st stem). As shown in FIG. 2, the paper 2 is conveyed in a direction away from the side registration guide 5, and the tip jII1 of the paper 2 reaches the alignment roll 10 at 10,000. In other words, since the circumferential speed of the skew roll 6 is higher at the end on the side registration guide 5 side than the end on the opposite side, the paper 2 is forcibly conveyed in a direction away from the side registration guide 5. is 1
Next, when the leading edge of the paper 2 reaches the alignment haze IOK, the alignment roll 10 sequentially aligns the side registration guide 5.
The paper 2 is aligned by pulling the paper 2 towards the side registration guide 5 and bringing one side of the paper 2 into contact with the side registration guide 5 (as shown in Figure 4), but the paper 2 is not aligned until the paper 2 is removed from the skew roll 6. Since rotational force is applied to the paper 2, the paper 2 can be aligned with a smaller paper travel width t' compared to the conventional method of simply separating the paper 2 from the side registration guide 5.

Furthermore, even if the paper 2 is protruded to the outside of the side registration guide 5 as shown in FIG.
There is no need to worry about rounding, paper jamming) or misalignment.

In the above embodiment, the oblique roll 6 is conical, but as shown in No. 5-(A), the roll 6 j*' has a different diameter.
The same function can be obtained by using a roller with a roll of 6 m integrated with a shaft part 6s, or a roller with different diameters 61 and 62 mounted at a distance of 6sK from the rotating shaft as shown in Fig. 5-). It is something.

As described in detail above, this invention uses diagonal rolls with different circumferential speeds at both ends to separate the paper from the side registration guide and then align it. This system does not cause paper jams even if the paper is brought in with the paper protruding outward from the paper, and since the paper is aligned while applying rotational force to the paper using diagonal rolls, it is possible to align the paper with a small paper travel width. , so that the size of the device itself can be reduced.

[Brief explanation of the drawing]

11th button and ←) are explanatory diagrams of a conventional alignment device, FIG. 2 is a perspective view of an alignment device that is an embodiment of the present invention, FIG. 3 is a plan view of the lower chute, and FIG. 4 0) Fig. 5B) and Fig. 5B are explanatory views showing other embodiments. 2 is paper, 5 is a side registration guide, 6 is a diagonal roll, and 10 is an alignment roll. Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Ben Rushi Tadashi Hamamoto Base (B)

Claims (1)

[Claims] A side registration guide 51I has a high circumferential speed on the side registration guide 51I and a diagonal roll 6t-1 on the opposite side has a small circumferential speed on the input side of the paper 2 to be aligned. In addition, an alignment roll 10 is provided at the rear of the skew roll 6 and is spaced apart from the skew roll 6 and the side registration guide 5 to bring the paper 2 closer to the side registration guide 5. paper alignment device.