JPS6246842A - Sheet aligning device for copying machine - Google Patents

Abstract

PURPOSE:To prevent damage occurring at a corner of the front end of a paper sheet during alignment, by deflecting the sheet in a direction in which its leading end moves away from a side registration guide after the paper sheet is introduced into the guide, and by aligning the paper sheet with the guide, starting from the trailing end side of the paper sheet. CONSTITUTION:A paper sheet 8 which is conveyed from a paper conveying device 8, is introduced into a sheet aligning device 1 through an inlet roll 5. When the leading end of the sheet reaches a deflecting roll 6, the sheet is deflected about the input roll 5 as a fulcrum by the conveying force of the deflector roll 6 in the direction in which the leading end of the sheet moves away from a side registration guide 7. Under this action the sheet 2 conveyed from the aligning device 8 to the side registration guide 7 is swung in the opposite direction before it abuts against the guide 7, and therefore, the sheet 2 is aligned with the guide 7, starting from the trailing end side thereof. Accordingly, it is possible to prevent the leading end of the sheet from being damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sheet aligning device button for a copying machine for registering one side of a sheet of paper to a fixed position.

BACKGROUND OF THE INVENTION Conventionally, double-sided copying machines have been equipped with an aligning device arrangement for aligning one side of the paper at a fixed position when feeding the paper again after one side has been copied. A known matching device is disclosed in Japanese Patent Laid-Open No. 109344/1983.

This conventional paper aligning device uses a diagonal roll that has a high circumferential speed on the side registration guide side and a low circumferential speed on the opposite side, on the upstream side of the paper to be aligned in the conveying direction. An alignment roll is provided at right angles or inclined at a predetermined angle, and is provided on the downstream side of the skew roll in the conveyance direction, and is spaced from the side registration guide by the skew roll and brings the next sheet toward the side registration guide. The structure is as follows.

Problems to be Solved by the Invention In the conventional paper aligning device described above, the paper is first swung in the opposite direction to the side registration guide, and then the paper is brought to the side registration guide by a diagonal roll and aligned. Therefore, during this alignment, the leading edge side corner of the paper is likely to collide with the registration guide, causing damage.

Means and Effects for Solving the Problems The present invention has been made in view of the above-mentioned problems, and includes a means for conveying paper from an inclined direction toward a side registration guide, and a method for conveying the paper conveyed by this means. It consists of a means for shaking the paper in a direction in which the leading edge of the paper moves away from the side registration guide before the leading edge comes into contact with the side registration guide, and the paper conveyed to the paper alignment device is moved to the side registration guide. After the sheet is carried toward the side registration guide, the leading end of the sheet is taken in the direction 'mrL from the side registration guide, and the sheet is aligned with the side registration guide from the trailing end.

Example Embodiments of the present invention will be described based on the drawings.

In the figure, reference numeral 1 denotes a paper alignment device installed near the duplex copying tray of a duplex copying machine (not shown). 3, an upper chute 4 provided above and parallel to the lower chute 3 with a gap therebetween;
It consists of an entrance roll 5 and a taking roll 6. Reference numeral 7 denotes a side registration guide provided on one side of the lower chute 3.

Reference numeral 8 denotes a paper conveyance device such as a belt for conveying the paper 2 to the paper alignment device 1, and the paper alignment device 1 is arranged at an angle of 0 with respect to the conveyance direction of the paper conveyance device 8. The entrance roll 5 is rotated so as to be transported in the same direction as the transport direction of the paper transport device 6, and the swing roll 6 is moved by a side registration guide 7 by 01 from the transport direction of the entrance roll 5. It is placed in the direction away from the Note that 0>θ1. In both rolls 5.6, the entrance roll 5
It is necessary that the rotational speed of the photographing roll 6 is greater than the rotational speed of the roll 6, and that the nip force of the main roll 5 is greater than the nip force of the swinging roll 6.

Although not shown, the rolls 5 and 6 are also provided in the lower chute 3, and each constitutes a pair of rolls, between which the paper 2 passes.

Each of the rolls 5 and 6 is connected to a drive device (not shown) with each roll 4a! It is linked via 5αI6α.

In the above configuration, the paper 2 transported from the paper transport device Ftg is carried into the paper alignment device 1 via the entrance roll 5. And when the tip reaches the furishirol 6,
Due to the conveyance force of the shaking roll 6, the leading end of the sheet 21i is swung away from the side registration guide 7, using the inlet roll 5 as a fulcrum.

Considering the conveyance force by the swing roll 6 at this time, and the moment when the entrance roll 5 and swing roll 6 are the axes, it can be divided into B and C as shown in Fig. 2, and the force C at this time is It acts as a moment that rotates the paper 2.

Due to the above action, the paper 2 transported from the paper transport device 6 toward the side registration guide 7 is swung in the opposite direction before hitting the side registration guide 7, and the paper 2 is moved from the rear end side to the side registration guide 7. It is adjusted to

Effects of the Invention According to the present invention, the paper 2 is forced to align with the side registration guide 7 from the leading edge of the paper by being threatened by the side registration guide 7 from the rear end in the transport direction within the paper alignment device 1. It is possible to eliminate damage to the leading edge of paper that occurs when printing.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view;
FIG. 2 is an explanatory diagram of the action. 1 is a paper alignment device, 2 is paper, and 7 is a side registration guide.

Claims (1)

[Claims] A paper aligning device for a copying machine that aligns one side of a sheet along a side registration guide 7 includes a means for conveying the sheet from an inclined direction toward the side registration guide 7, and a means for conveying the sheet from an inclined direction toward the side registration guide 7. A method for aligning paper in a copying machine characterized by comprising means for shaking the paper in a direction in which the leading edge of the paper 2 moves away from the side registration guide 7 before the leading edge of the paper 2 comes into contact with the side registration guide 7. Device.