JPS6041570Y2 - Transfer paper removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for removing jammed transfer paper in a copying machine or the like, and more particularly to a device for removing jammed transfer paper between a photoreceptor and a paper feeder.

Conventionally, removing transfer paper caught between the photoreceptor and paper feeder (
In this method, the drive roller of the paper feeder is reversely rotated to remove the transfer paper.

However, transfer paper jammed in such a position,
Since the transfer paper is normally firmly attached to the surface of the photoreceptor due to static electricity, it is often impossible to remove the transfer paper simply by reversing the drive roller because the gap between the drive roller and the transfer paper will slip. Ta.

To solve this problem, conventional measures have been taken such as increasing the clamping pressure between the drive roller and the driven roller; The rollers and driven rollers are partially deformed, causing problems such as poor paper feeding.

The present invention is a distant relative of a transfer paper removal device that can reliably remove transfer paper caught between a photoreceptor and a paper feeder, but does not partially deform the drive roller or driven roller. purpose.

To summarize the present invention, in a paper feeding device that feeds a transfer sheet toward a photoreceptor by a gripping/rotating motion between at least a pair of driving rollers and a driven roller, the driving roller is structured to be able to reverse rotation as necessary. In addition, a pressure lever capable of applying an external force is provided to face the drive roller or the driven roller, and the pressure lever can strengthen the clamping force when the drive roller rotates in reverse to eject the paper.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

The drawing is an enlarged view of a paper feeding section of a copying machine, and the photosensitive drum, which is designated as a whole by reference numeral 1, has a reversible drive roller 2.
The drive roller 2 is rotated and stopped at predetermined timing.

Two driven rollers 5 and 6 are in rolling contact with the circumferential surface of the drive roller 2 and are applied with clamping pressure by springs 3 and 4 shown in FIG.

Also, there are three guide plates facing the contact position between the driving roller 2 and the driven roller 5. , 8.9 are opened, and the transfer paper A fed out from these passages 10.11 is moved by the feeding movement of the rollers 2.5.6. Paper feed section guide 12.13
The photosensitive drum 1 is supplied to the photosensitive drum 1 through the photosensitive drum 1.

According to the present invention, on the side of the driven roller 6, an operating shaft 14 parallel to the shaft 6a of the driven roller 6 is installed on a frame 15 (FIG. 2), and on this operating shaft 14, a plurality of pressing The base 16a of the lever 16 is fixed.

The tips 16b of these pressing levers 16 face the shaft 6a in order to apply an external force to the driven roller 6.

Further, the operation shaft 14 protruding from the frame 15
An operating lever 17 having a finger rest 17a is fixed to the end of the lever.

Since the transfer paper removal device of the present invention has the above-described structure, when the transfer paper A jams between the photosensitive drum 1 and the paper feeder, the drive roller 2 is removed in the direction of the arrow X as shown in the second figure.
Reverse the paper and remove the jammed transfer paper A.

In this case, by strongly pressing the operating lever 17 in the direction of arrow Y with your fingertip, the clamping force between the drive roller 2 and the driven roller 6 is increased, so that the transfer paper A that cannot be removed by simply rotating the drive roller 2 in the reverse direction is removed. can also be definitely eliminated.

Further, according to the present invention, the driving roller 2 and the driven roller 5,
Since it is sufficient to apply the force necessary for paper feeding during the period 6, there is no possibility that some of these rollers will be permanently deformed and paper feeding failures will occur.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a paper feed section of a copying machine to which the present invention has been applied, and FIG. 2 is a side view of the same paper feed section. 1... Photosensitive drum, 2... Drive roller, 5゜6... Driven roller, 14...
Operation axis, 16...Press lever, 17...
・Operation lever.

Claims (1)

[Scope of utility model registration request] In a paper feeding device that feeds a transfer sheet toward a photoreceptor by a pinching/rotating motion between at least a pair of driving rollers and a driven roller, the driving roller is configured to be able to reverse rotation as necessary, and the driving roller or the driven roller A transfer paper removal device is provided with a pressure lever capable of applying an external force, and the pressure lever can strengthen the clamping force when the drive roller is reversely rotated to discharge the paper.