JPS61136843A - Picture forming device - Google Patents

Abstract

PURPOSE:To prevent a pin, a clip and the like from being fed together with paper, by installing a magnet in a paper feeding part. CONSTITUTION:A magnet 11 is attached to a filmlike or soft member 19 of a body 6. If so, a pin and a clip on paper 2 inside a cassette 1 are fed together with the paper 2 in time of paper feeding, but since there is the magnet 11, they are no longer fed furthermore. For your information, as for this magnet 11, a rubberlike somthing also may be available. And, if it is rubberlike and soft in particular, it may be directly attached to the body 6. Thus, the magnet is installed in a paper feeding part whereby abnormal conveyance due to these pins, clips, etc., is preventable from occurring before it happens.

Description

Detailed Description of the Invention [Industrial Applicability] The present invention relates to an image forming apparatus, specifically, an image forming apparatus such as a copying machine or a printer, which uses a sheet material (cut form, roll form). The present invention relates to an image forming apparatus including a conveying device, particularly a paper feeding device section.

[Conventional technology]

Conventionally, this type of device has been constructed as shown in FIG. 4 or FIG. 5, with the one shown in FIG. 4 being called a separation claw type (cassette type) and the one shown in FIG. 5 being called a friction separation type.

In the cassette method, paper 2 in cassette L is fed into paper feed roller 3.
In many cases, the paper is sent out by the paper, passes through the transport guide 4, hits the registration rollers 5, and is transported again by the registration rollers 5 at a certain timing.

The friction separation method is also the same, but as shown in FIG. 5, it consists of a paper feed tray 7, a paper feed roller 8, and a slip pad 9 instead of the cassette 1. In other words, paper 2 is from paper feed core a.
8 feeds the top paper, but the paper 2 below is braked by the slip pad 9, so the primary paper feed correc-
: It will be in a wait state until 18 rotates.

[Problems that the invention seeks to solve]

The problem here is when paper clips, staples, pins, etc. fall onto these sheets of paper 2, and they are transported together with the sheets of paper 2 and get stuck in the paper feed rollers 8 or between the transport guides 4. They often get stuck or get stuck in the registration rollers 5, preventing normal paper feeding.

Especially since there are many cases where the original (manuscript) is bound in a bottle or clipped and then copied.

This is a matter that requires attention.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide an image forming apparatus that prevents staples, pins, etc. from being conveyed together with paper.

〔Example〕

The present invention will be explained below based on one embodiment shown in the drawings.

FIG. 1 shows an improved example of the cassette of the present invention, and FIG. 2 shows an improved example of the friction separation method.

Referring to FIG. 1, a magnet 11 is attached to a film-like or soft member 10 on the main body 6. In other words, the pins and clips on top of the paper 2 in the cassette 1 are fed in when the paper 2 is fed, but because the magnet 11 is present here, the pins and clips are not fed any further.

Although the magnet holder 10 and the magnet 11 are shown here, the magnet 11 may be made of rubber, or may be attached directly to the main body 6 if it is made of rubber and is particularly soft.

FIG. 2 shows an example of the same frictional separation method, in which a magnet rubber 12 is provided near the entrance of the paper feeder section, and is adapted to attract metal members such as clips.

Figure 3 is a side view of the structure described in the example (Figure 2), and what I want to say here is the magnet rubber 1 in the largest paper.
This is an example where it is sufficient to provide 2. Further, if the width of the cassette differs depending on the size of the paper 2, it is sufficient to cut the magnet rubber 12 into several pieces, and the dotted lines in FIG. 3 are examples of such cuts.

Furthermore, even with the system shown in Figure 2, the magnet 11 is the same as in Figure 1.
or a rubber magnet or soft holding material 1
0 with a magnet attached.

In other words, a magnetic field is applied directly or indirectly to the top surface of the paper sheet using a strong magnet, thereby causing the magnetic material on the paper sheet z to adhere.

The present invention is characterized in that the magnets 11 and 12 are installed before the paper feed rollers 3 and 8; however, the present invention is not limited to this location, and the N! Of course, it is also possible to do so.

〔Effect of the invention〕

As explained above, simply providing a magnet in the paper feed section has the effect of preventing abnormal conveyance caused by pins, clips, etc.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of the main parts of an embodiment of an image forming apparatus according to the present invention, FIG. 2 is a front sectional view of the main parts of another embodiment, and FIG. A right side view, FIG. 4 is a front sectional view of a conventional example, and FIG. 5 is a front sectional view of another conventional example.

Claims (1)

[Claims] (1) An image forming apparatus having a paper feeding mechanism, which includes a device that brings a magnet into direct or indirect contact with the surface of the paper and attracts a magnetic substance on the surface of the paper.