JPS58152742A - Device for truing up paper - Google Patents

Abstract

PURPOSE:To assemble pinch rollers and true-up rollers in a simple manner lest paper should be moved obliquely, by placing the shaft of the pinch rollers at an angle to that of the true-up rollers while the pinch rollers are in pressure contact with the true-up rollers. CONSTITUTION:A paper true-up device comprises true-up rollers 1 and pinch rollers 2 and pinches paper 3 conveyed to the device. The rotary shaft 4 of the true-up rollers 1 is secured on the body of a machine such as a copier. The rotary shaft 5 of the pinch rollers 2 is placed at an angle of alpha to the rotary shaft 4 so that the rotational angle of the shaft 5 is adjusted at the time of the assembly of the device to prevent the paper 3 from being obliquely moved as shown by an arrow 6. For the adjustment, an eccentric cam 8 is turned by a lever 10 to move an arm 7 in a direction 11 to displace the rotary shaft 5 of the pinch roller 2 relative to that 4 of the true-up rollers 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper alignment apparatus, and more particularly to a paper alignment apparatus suitable for use in a copying machine.

In a copying machine, copy paper is fed to a paper alignment device consisting of alignment rollers and pinch rollers, and is temporarily stopped there. In synchronization with the movement of the photoreceptor, which is a moving member on the downstream side, the paper held by the paper alignment device is sent to the photoreceptor. If the paper is aligned with the m+quadrant area of the photoreceptor, the paper will be able to receive the image properly, but if the paper is skewed and misaligned, it will not be able to receive the image in the correct orientation. become unable.

In order to prevent this skew of the paper, when assembling the alignment roller and pinch roller in a copying machine or as a sub unit, a jig is used to ensure that the paper being fed runs parallel to the photoreceptor. The assembly work was carried out accurately and carefully. However, even if this work is done carefully, it is a very troublesome work to make adjustments to prevent completely skewed movement due to the influence of the rotation axis of the pinch roller and alignment roller and the accuracy of other parts. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a paper alignment device in which alignment rollers and pinch rollers can be easily assembled to prevent skewing of paper.

In order to achieve this object, according to the present invention, the roller includes an alignment roller and a biotin roller, and pinches the paper being fed, and feeds the paper in an aligned state with respect to a moving member on the downstream side. Provided is a paper feeding device for a paper aligning device which has nine features that enable the axis of the pinch roller to be arranged at an angle to the cap of the aligning roller while the pinch roller is in pressure contact with the aligning roller. be done.

Therefore, after installing the alignment roller and pinch roller with rough precision, the pinch roller axis t is tilted with respect to the alignment roller axis to correct the skew of the paper. There is no hassle at all.

The present invention will be described in detail below with reference to the drawings.

The principle of the present invention is illustrated in FIGS. 1-S.

The paper aligning device is composed of an aligning roller 1 and a pinch roller 2, and is adapted to pinch the fed paper 3. The paper 3 is fed and stopped by both rollers 1 and 2, and in the copying machine, the paper 3 is fed and stopped in synchronization with the movement of a moving photoreceptor (not shown) arranged on the lower flL side. For example, the alignment roller 1 is driven to rotate.

In the present invention, as shown in FIG.
The rotation axis 4 of the pinch roller 2 is fixed relative to the main body of the machine such as a copying machine, but the rotation axis 5 of the pinch roller 2 is rotated by the rotation s4 of the alignment roller.
It is attached so that it can be placed at an angle to the In this case, it is of course impossible for the pinch roller 2 to rotate while being pressed against the alignment roller 1 in order to feed and stop the paper 3.

The running of the paper 30 when the shaft 5 of the pinch roller 2 is rotated as shown in FIG. 2 will be described with reference to FIGS. 3 to 5. FIG. 3 shows the case where the axis 5 of the pinch roller 2 is aligned with the axis 4 of the alignment roller 1, and the paper 3 is fed in a direction perpendicular to both axes. On the other hand, as shown in FIG. 7, when the paper 3 is arranged at an angle α with respect to the pinch roller 2t and the alignment roller 1, the paper 3 moves obliquely in the direction of the arrow 6. FIG. S shows the case where the pinch roller 2 is rotated and placed in the opposite direction from that shown in FIG.

Although the alignment roller 1 shown in FIGS. 3 to S is shown as being completely parallel to the photoreceptor, it is necessary to arrange it in this way when the alignment roller 11 is installed in a copying machine or as a subunit. That's a problem.

Therefore, in order for the paper 3 to be advanced to the photoreceptor without being skewed,
Utilizing the fact of FIG. 7 or FIG.
During assembly, the rotation angle of the shaft 50 is adjusted to eliminate skewing of the paper 3.

A structure for rotating the axis 5t of the pinch roller 2 with respect to the axis 4 of the alignment roller 1 is shown in FIGS. 6 to 9. 6th
In the figure, both ends of the rotation shaft 50 of the pinch roller 20 are supported by an arm 7 (only one arm is shown) K so as to be angularly positionable, that is, rotatably supported. This arm is attached to the main body of the copying machine or as a subunit so as to press the pinch roller 2 against the alignment roller 1 and move the end of the pinch roller 2 horizontally.

A □-eccentric cam 8 is rotatably attached to the end of the arm T opposite to the pinch roller 2, and this eccentric cam 8 is rotatable through a fixed shaft 9 relative to the copying machine body. installed. As shown in FIG. 7, the eccentric cam 8 has a lever 10 that serves as a rounded handle that is rotated within the eccentric cam m* arm T. Therefore, as shown in FIG. 3, the cam 8tl can be rotated by holding the lever 10t. In this case, the arm is attached so that the other end of the pinch roller shaft 5 is shifted in the opposite direction to the paper moving direction
Preferably a cam structure is provided. Its structure is similar to that shown in Fig. gA, and when the lever 101 is in the position shown in Fig. 3, the arm T may be connected so as to move in the direction opposite to the arrow 11.

By doing this, the state shown in FIG. S is realized, and the oblique movement of the paper 3 in the direction of the arrow 6 in FIG. 6 is corrected.

FIG. 9 shows the case where the cam 8 is rotated in the opposite direction to that shown in the figure, and the arm T moves in the direction of the arrow 12 to align the axis 5 of the pinch roller 2 with respect to the axis of the alignment roller 1. Although it is rotated as shown in Figure 1, the skew in the direction of the arrow in Figure S is corrected. The amount of angular change of the arm T transfer device, that is, the pinch roller 2 @5, with respect to the alignment roller shaft 4 by operating the lever 10 changes depending on the degree of eccentricity of the cam 8. The degree of eccentricity can be arbitrarily set as desired.

As described above, according to the present invention, even if the alignment roller is not installed parallel to the photoreceptor, it is possible to easily correct the skew of the paper. In particular, the adjustment for the correction must be made finely and accurately using a cam, and the skewed feeding of paper can be completely eliminated in the assembled device.

[Brief explanation of the drawing]

Figure 1 is a schematic perspective view showing the relationship between the matching roller and the pinch roller, Figure 2 is a plan view showing the relationship between the pinch roller and the alignment roller, and Figures 3 to S are the angle of the pinch roller with respect to the alignment roller. Fig. 6 is a side view showing the structure for moving the paper using pinch rollers, Fig. 7 is a perspective view of the eccentric cam, and Figs. 3 and 9 show the eccentric cam being rotated. FIG. 6 is a diagram similar to FIG. 6 showing the case. 1... Aligning roller 2... Pinch roller 3... Paper 4... Aligning roller rotation axis 5... Pinch roller rotation axis 7... Arm 6... Eccentric cam 9... Cam rotation shaft 10...Cam lever Fig. 6 Fig. 9 2

Claims (1)

[Claims] [In a paper aligning device consisting of a pairing roller and a pinch roller, which pinches the fed paper and feeds the paper in an aligned state with respect to a moving member on the downstream side,
A paper feeding device characterized in that when the pinch roller is in pressure contact with the alignment roller, the axis of the pinch roller is arranged at an angle to the axis of the alignment roller so that it hangs.