JPS606542A - Feeder - Google Patents

Abstract

PURPOSE:To stably and smoothly feed a transfer material, by a method wherein intermediate rollers are disposed halfway between a feed roller and resist rollers, a curl shape is formed on the transfer material by means of the intermediate rollers. CONSTITUTION:Intermediate rollers 9 are disposed on a transfer material convey route located halfway between a feed roller 2 and resistor rollers 5, and a projecting curl shape is formed on a transfer material 3 with the aid of the intermediate roller 9. This causes the front edge part of the transfer material to point downward, reduces the area of a contact with a underlaying feed guide 7, facilitates formation of a upward-projecting loop, and enables prevention of adsorption of the transfer material 3 to the underlaying feed guide 7 and prevention of curling at a feed port (b) section of the transfer material, resulting in the possibility to stably and smoothly feed the transfer material 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet-like copy material feeding device used in image forming equipment such as a copying machine or a recording device.

The device shown in FIG. 1 as seven examples of current copying machine feeding devices has a sheet material, that is, a transfer material, and a transfer material 3 loaded in a loading cassette/in cooperation with a mold separation system of the loading cassette. The transfer material is moved so that the developed image formed on the drum is transferred to a proper position on the transfer material 3 between the feeding roller, which feeds seven sheets at a time, and the object to be applied, that is, the photosensitive drum B. A registration roller is provided to adjust the feeding timing.

In this apparatus, the transfer material 3 fed from the transfer material loading cassette/by the feeding roller λ reaches the registration roller S via the feeding guide barb.

The registration rollers S are configured to feed the photosensitive drum 4 so that the developed image formed on the photosensitive drum 4 is transferred to a proper position on the fed transfer material.

In this case, the transfer material is the developed image on the photosensitive drum 4 and the transfer) A
3 to the correct position without delay, and in order to correct this in case the transfer material reaches the registration roller S in a skewed manner, it is shown by a solid line in the region a upstream of the registration roller S. A loop is formed over the leading edge of the transfer material 30 as shown in FIG.

However, due to the configuration of the machine, the feeding guide barb may rise steeply, or the feeding guide may become charged due to friction between the feeding guide bar and the transfer material 3, and the transfer material may be attracted to the feeding guide. In such a case, the force of the feeding roller to push out the transfer material is not properly transmitted to the front, and the transfer material forms a loop at the feeding port as shown by the broken line 3'. Therefore, the transfer material may not reach the registration rollers 5, or even if it does reach the registration rollers S, the transfer material may enter the registration rollers S while being conveyed obliquely, resulting in a clogging phenomenon or a problem in which the developed image on the photoreceptor drum and the transfer material are It has drawbacks such as not being in the correct position.

In order to solve the above-mentioned drawbacks, the present invention provides an intermediate roller in the transfer material conveyance path between the feeding roller and the registration roller, thereby causing the fed transfer material to have an upwardly convex curl. By applying this force, the leading edge of the transfer material is directed downward, the contact area with the lower feeding guide is reduced, and an upwardly convex loop is easily formed, so that the transfer material is not attracted to the lower feeding guide. To provide a copy material feeding device capable of stably and smoothly feeding a transfer material by preventing it from curling (as shown by the broken line 3' in FIG. 1) in the feeding port area. It is.

The present invention will be described below with reference to the accompanying drawings showing one embodiment of the present invention.

In FIG. 2 showing a transfer material cassette feeding system showing an embodiment of the present invention, 9 is an intermediate roller provided between the feeding roller and the registration roller, and has the role of curling the transfer material downward; 79g is an intermediate roller; Lower and upper feed guides up to the rollers.

The transfer material 3 is transferred to the transfer material loading cassette/
The material is fed through the intermediate feeding shaft and reaches the intermediate roller rough. The intermediate roller 9 starts rotating before or after the transfer material reaches the transfer material 3, and is fed while giving the transfer material 3 a downward curl. The transfer material curls downward and moves to the lower feeding guide 7.
While maintaining a small contact area, the front edge of the lower feeding guide 7 is transmitted, and reaches the registration roller S. At this time, as it approaches the registration roller S, the transfer material moves as indicated by the broken line in the figure. →The state becomes 32, and a predetermined loop amount is stably formed at the reaching part (part a in FIG. 1) as shown in 3□ just before the roller. This corrects the skew of the transfer material, and the rotation of the registration rollers 3 feeds the transfer material to the proper position with respect to the developed image on the photosensitive drum (see FIG. 1).

The rotation of the intermediate roller is started in synchronization with the rotation of the feeding roller, and the intermediate roller is rotated for a certain period of time at which a predetermined loop amount is formed at the registration roller arrival portion, and then stopped. and,
As the registration roller rotates, it rotates again. Also,
Its rotational speed is the same as that of the registration roller.

As explained above, the present invention provides an intermediate rope between the feeding roller and the registration roller to give the transfer material fed from the cassette an upward curl, thereby causing the transfer material to stick to the lower feeding guide. This has a remarkable effect in avoiding a reduction in the conveyance force of the transfer material and skewing the transfer material, and also in enabling a steep rise configuration of the feeding guide, which is necessary for realizing a compact feeding system.

[Brief explanation of the drawing]

FIG. 7 is a sectional view of a typical example of a conventional feeding device,
The figure shows a sectional view of an embodiment of a feeding device according to the invention. /...Transfer material loading cullet unit...Feeding roller 3...Transfer material ga...Feeding guide S...Registration roller Ro... ...Photosensitive drum 7...Lower feeding guide g...
・Upper feeding guide 9...Intermediate roller

Claims (1)

[Claims] A sheet material loading section for loading sheet materials, a feeding means for feeding the sheet materials loaded thereon from the sheet material loading section, and a means for feeding the sheet materials to the applicable object, A feeding device characterized in that a roller-shaped regulating means is provided in the middle of the feeding means, thereby imparting a curled shape to the sealing material.