JPS6067968A - Paper feeding device - Google Patents

Abstract

PURPOSE:To move either of a manual insertion table and a paper conveyance part while the other is opened by coupling the both with each other. CONSTITUTION:When a form jams at the paper conveyance part 17, the manual insertion table 18 is pressed up and a rotating shaft 25 is pressed down with a lever 35, so that the paper conveyance part 17 is opened by being rotated around a shaft 24 against the energizing force of a spring 33. When the paper conveyance part 17 is rotated and drawn out to the contrary, the manual insertion table 18 coupled by the lever 35 is pushed up through the tip 32 of an arm 31 and opened by being rotated upward. Therefore, when the manual insertion table 18 and paper conveyance part 17 are opened individually, operation need not be performed twice. Further, the overlooking of a jamming paper piece due to the blocking of a visual field with the manual insertion table 18 when the paper conveyance path 17 is opened is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus such as a copying machine or a printer using electrophotographic technology, and particularly to a paper feeding device thereof.

[Prior art and drawbacks]

In conventional paper feeding devices, when paper becomes jammed in the middle of a conveyance path, two manual feed tables and paper feeding guides are opened separately to clear the jam.

However, in the conventional means for opening the paper feed guide separately, even if the paper feed guide is opened, the manual feed tray blocks the field of view and the inside is not visible, making it easy to miss a piece of paper in a paper jam.

Furthermore, opening both the paper feed guide and the manual feed table requires two operations, which makes the operation complicated.

[Purpose of the invention]

In view of the above-mentioned drawbacks of the conventional art, an object of the present invention is to provide a paper feed device in which a manual feed tray and a paper feed guide are connected, and by opening one of them, the other can be opened. .

[Key points of the invention]

And 1. In order to achieve the above-mentioned object.

A paper feeding device having both a manual feed stand and a paper conveyance section is characterized in that either the front handle feed stand or the paper conveyance section are connected so that by moving one, the other can be moved.

[Embodiments of the invention]

Two embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a sectional view of an electrophotographic copying machine.

Electrophotographic copying machines perform charging, exposure, development, and transfer.

Consists of six basic processes: fusing and cleaning.

In the charging step, a corona discharge is performed on the photoreceptor 1 using a charging discharge electrode 2 to give a uniform electrostatic charge to the surface of the photoreceptor 1.

In the exposure process, the light reflected from the original document out of the light from the light source 3 is irradiated onto the photoreceptor 1 through the optical system.

The potential on the surface of the photoreceptor 1 is attenuated in proportion to the amount of irradiated light, and an electrostatic latent image is formed on the surface of the photoreceptor 1.

In the developing process, when the developing device 4 brings into contact a colored film toner having a polarity opposite to that on the surface of the photoreceptor 1, the toner adheres to the charged portion of the image carrier surface due to electrostatic force. However, the electrostatic latent image becomes a visible image.

In the transfer step, the transfer discharge electrode 5 performs corona discharge to apply an electric charge of opposite polarity to the toner from the back side of the paper, thereby transferring the toner. Other than corona discharge, there is a method of applying the necessary potential to the back surface of the transfer paper using a conductive roller.

After the paper 19 to which the 1-toner has been transferred is separated from the surface of the photoreceptor 1, it is heated to a temperature of over 100 degrees by the fixing device 6.

The toner is melted and fixed on the paper 19.

The paper feeding device includes a cassette 11, a paper feeding roller 12, feed rollers 13' and 14, registration rollers 15 and 16, a paper conveying section 17, and a manual feed table 18.

A large number of sheets of paper 19 are stored in the cassette 11.

The top end of the paper 19 is pressed against the paper feed roller 2 by a spring 20.

The feed rollers 13 and 14 are composed of a pair of feed roller 13 rotatably attached to the main body of the copying machine and feed roller 14 attached to the paper 1 narrowing section.
The paper 19 conveyed in step 2 is conveyed to registration rollers 15 and 16.

The paper conveying section 17 has a plurality of feed rollers 14 rotatably provided on a paper guide portion 21 having a curved concave surface, and a manual feed roller 22 is provided on the upper surface. (See FIG. 3) Also, a shaft 24 is provided on the side surface of the paper conveying section 17.

A pivot shaft 25, a protrusion 26 and spring holes 27, 28 are provided.

The manual feed stand 18 has a hole 30 provided in the flange 29.
It is semi-rotatably supported by the main body of the copying machine, and a tip shaft 32 is erected at the tip of an arm 31 extending from the manual feed table 18.

The paper conveyance section 17 is rotatably supported by the copying machine main body by a shaft 24 via a spring 33 whose one end is fixed in a spring hole 27. The spring 33 is biased in a direction that prevents the paper conveyance section 17 from rotating and being opened.

Further, one end of the lever 35 is connected to the rotating shaft 25 via a spring 34, and the other end is connected to a tip shaft 32 provided on the arm 31 of the manual feed table 1B.

To explain the operation of the saw paper feeding device constructed as described above, a large number of saw papers 19 are stored in the cassette 11, and after being separated one by one by a separating claw (not shown), the saw paper 19 is fed into the cola 12. sent out. The paper 19 sent out from the cassette is changed direction by the guide section 21, and is conveyed by the feed rollers 13 and 14 to the front of the registration rollers 15 and 16, where it waits.

In accordance with the timing of the photoconductor 1, the registration roller 15,
After the paper 19 is sent out from the paper 16, transferred by the transfer discharge electrode 5, and fixed by the fixing device 6.

It is ejected outside the aircraft.

Now, the paper 19 is jammed in the paper transport section 17 and a jam has occurred.
When removing this, as shown in Figure 2, 1 manual feed tray 1
8 is pushed up, the lever 35 pushes down the rotating shaft 25, and the paper conveying section 17 moves around the shaft 24 against the biasing force of the spring 33.

Rotate and release.

Conversely, if you rotate and pull out the paper conveyance section, the lever 35
The manual feed stand 18 connected to the arm 31 is pushed up via the tip shaft 32 provided on the arm 31, rotated in the second direction, and opened.

〔Effect of the invention〕

According to the present invention having the above configuration, when a paper jam occurs in the paper conveyance path, one manual feed table 18. Alternatively, when either one of the paper conveyance sections 17 is rotated, the other one is also opened in conjunction with the rotation.

Therefore, it is not necessary to open the manual feed tray and the paper conveyance section twice.

In addition, even if one paper conveying section is opened, one manual feed table will block the field of view and the inside will not be visible, so that jammed pieces of paper will not be overlooked.

Furthermore, if you want to return it to its original state, use one manual feed stand or paper! If one of the narrowing parts is restored, the other one will also be restored.

It will return in conjunction with this.

Therefore, it is easy to re-sent to the normal position after clearing the jam.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the copying machine of the present invention, FIG. 2 is a sectional view showing its operating state, and FIG. 3 is an assembled view of the main parts of the present invention. 11... Cassette 12... Paper feed roller 13,1
4...Feed roller 15.16...Registration 1''-ra 17...Paper transport section 18...Manual feed table 19...Paper 21...Guide section Fig. 1 Fig. 2M 31'- 11 p+1 35

Claims (1)

[Claims] (1) A paper feeding device having both a manual feed table and a paper conveyance section, characterized in that the manual feed table or the paper conveyance section are connected so that by moving either one, the other can be moved. paper equipment.