JPS63165255A - Paper feeding device - Google Patents

Abstract

PURPOSE:To simplify the structure of a driving system by providing a paper feeding means which selectively enables both cassette feeding and manual feeding by the use of one roller, on the paper feeding opening part of a picture image forming device body, in an electronic copying machine, etc. CONSTITUTION:At the time of cassette feeding, as a solenoid 25 is turned on, a swinging link 27 is rotated against the tensile force of a spring 26 releasing a revolving link 24 from engagement to lower a paper feed roller 23 by its own weight, which is brought into contact with the topmost part of sheets of copying paper P piled and housed in a paper feeding cassette 8 through the cutout part 82 of a manual feeding guide 81. On the other hand, as the solenoid 25 is turned off, the swinging link 27 is rotated clockwise due to the tension spring 26 and engaged with the revolving link 24 to lift up and set the paper feed roller 23 in a defined paper feeding position. Both positions of the roller 23 are detected by a detecting switch 28 and a sheet of paper on the manual feeding guide 81 or a sheet of paper in the paper feeding cassette 8 is sent to a picture image forming part via a pair of separating rollers 10 by the rotation of the paper feed roller 23. Thereby, the structure of a paper feed driving system can be simplified.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention provides an improved cassette paper feeding section equipped with a manual paper feeding section in an image forming apparatus such as an electronic copying machine. This relates to paper devices.

(Prior Art) Conventionally, a cassette paper feeding section of this type of image forming apparatus, for example, an electronic copying machine, particularly a cassette paper feeding section equipped with a manual paper feeding section, has a system as shown in FIGS. 6 and 7. , a cassette paper feed roller 101 and a manual paper feed roller 102 are arranged, and a manual feed guide 201 is provided on the upper surface of the paper feed cassette 200 to be loaded.
00 is loaded into the paper feed opening of the main body, and copy paper P made of plain paper as recording paper is selectively fed from a cassette or manually.

(Problems to be Solved by the Invention) However, in the conventional paper feeding device described above, the cassette paper feeding roller 101 and the manual paper feeding roller 102 are
Since these are arranged exclusively for each, it is necessary to configure a drive system for the single manual paper feed roller 102 in addition to the drive system for the cassette paper feed roller 101. ! ! There was a problem that the configuration of the dynamic system became complicated and the cost increased.

The present invention has been made under the above circumstances, and its purpose is to simplify the configuration of the drive system by using one roller for both the cassette paper feed roller and the manual paper feed roller. It is an object of the present invention to provide a paper feeding device that is simplified and can reduce costs.

[Structure of the invention] (Means for solving problems) In order to solve the above-mentioned problems, the present invention has been made.

A paper feeding means that selectively enables cassette paper feeding and manual paper feeding with a single roller is provided in a paper feeding opening of an image forming apparatus main body into which a paper feeding cassette capable of manual paper feeding is loaded. This is what I did.

(Function) That is, by having the above configuration, the present invention has the following features:
Since the cassette paper feeding roller and the manual paper feeding roller are combined into a single roller and cassette paper feeding and manual paper feeding are selectively performed, the structure of the drive system is simplified. It becomes possible to reduce costs.

(Embodiment) The present invention will be described in detail below with reference to an embodiment shown in FIGS. 1 to 5.

FIG. 1 schematically shows the internal mechanism of an electronic copying machine which is an image forming apparatus equipped with a paper feeding device according to the present invention, and numeral 1 in the figure indicates the main body of the apparatus. A drum-shaped photoreceptor 2 serving as an image carrier is rotatably supported approximately at the center of the apparatus main body 1, and the photoreceptor 2 is uniformly charged by a charger 3. At the same time, a document image (not shown) placed on a document table 4 made of transparent glass is exposed to exposure lamps 5a, first, second . a third reflective mirror 5b,
5c, 5d, a lens 5e, and a fourth reflective mirror 5f to form an electrostatic latent image on the latent image surface 2a of the photoreceptor 2. developing device i
! 6, the developer is applied and developed, and the transfer charger 7
On the other hand, rotate it to the side.

This transfer charger 7 is a paper feeding device, which will be described later, from a paper feeding cassette 8.9 loaded into the paper feeding opening 1a of the apparatus main body 1. The developed image is transferred onto the copy paper P which is automatically or manually fed by the AC 20 and fed through the separation roller pair 10 and the aligning roller pair 11.
It is designed to be peeled off by a peeling charger 12 using corona discharge.

Further, the copy paper P after transfer and peeling is peeled off from the photoreceptor 2 by a separating device, which will be described later, and passed through the conveyance path 13 to the fixing device! 14 fuses and fixes the developed image, and a pair of discharge rollers 15 discharges the developed image onto a paper discharge tray 16.

Furthermore, the developer remaining on the latent image surface 2a of the photoreceptor 2 after the transfer and peeling of the developed image onto the copy paper P is cleaned by a cleaning device 17, and the photoreceptor 2 is cleaned by a static elimination lamp 18.
The upper potential is lowered below a certain level to enable the next copy operation.

And the above-mentioned paper feeding device g! 20 is the second vA and the third
As shown in the figure, it consists of one paper feed roller 23 that is rotatably provided in the vertical direction via an interlocking lever 22 at the center of a drive shaft 21 that is rotationally driven by a drive system (not shown). is the paper feed opening 1 of the apparatus main body 1 of the paper feed cassette 8 in which the manual feed guide 81 is formed on the top surface.
When the copy paper P is loaded in the paper feed cassette 8, it can come into contact with the top of the copy paper P stacked and stored in the paper feed cassette 8 through a guide portion 82 cut out on the upper surface of the tip of the paper feed cassette 8, thereby making it possible to contact the top of the copy paper P stacked and stored in the paper feed cassette 8. Paper is now being fed.

In other words, the paper feed system mentioned above! ! 120 paper feed rollers 23
As shown in FIGS. 4 and 5, this is rotatable in the vertical direction via an interlocking lever 22 using a drive shaft 21 as a fulcrum.
4, and the rotating link 24 is released from the engaged state with the swinging link 27, which rotates against the biasing force of the spring 26 by turning on the solenoid 25 when feeding the cassette. This causes the paper feed roller 23 to come into contact with the top of the copy paper P stacked and stored in the paper feed cassette 8 with its own weight. The link 27 is rotated by the biasing force of the spring 26, and the rotating link 24
This allows the paper feed roller 23 to be lifted and rotated from the cassette paper feeding state shown by the two-dot broken line, thereby setting the paper feed roller 23 at a predetermined manual paper feeding position. . Further, reference numeral 28 in the figure is a detection switch that detects the cassette paper feeding position and the manual paper feeding position of the paper feeding roller 23.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As is clear from the above description, according to the present invention, a single roller feeds paper into the paper feed opening of the image forming apparatus main body into which a paper feed cassette capable of manually feeding paper is loaded. Since it is equipped with a paper feeding means that selectively enables manual paper feeding, the structure of the paper feeding drive system is simplified, and thereby,
It is possible to provide a paper feeding device that has an excellent effect of reducing costs.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing an embodiment of an electronic copying machine as an image forming apparatus equipped with a paper feeding device according to the present invention;
The figure is a schematic perspective view of the main parts of the paper feeder, FIG. 3 is a schematic plan view of the main parts of the paper feeder, and FIG. 4 is a view from the front side of the electronic copying machine showing the operating state of the paper feeder. Schematic diagram as seen. FIG. 5 is a schematic explanatory diagram seen from the rear side of the electronic copying machine showing the operating state of the paper feeding device, FIG. 6 is a schematic perspective view of the main parts of the conventional paper feeding device, and FIG. 7 is the same. FIG. 2 is a schematic plan view of main parts of a conventional paper feeding device. 1... Apparatus main body, 1a... Paper feed opening, 8...
・Paper cassette, 81... Manual feed guide, 20...
Paper feeding device, 21... Drive shaft, 22... Interlocking lever. 23... Paper feed roller, P... Recording paper. Applicant's representative Patent attorney Takehiko Suzue Procedural amendment Showa, 6i-2fj2 Commissioner of the Patent Office Kuro 1) Mei IIn 1, case indication patent application No. 61-311502 2, name of invention Paper feeding device 3 , Relationship with the case of the person making the amendment Patent applicant (307) Toshiba Corporation 4, agent UBE Building 6, 3-7-2 Kasumigaseki, Chiyoda-ku, Tokyo, subject of amendment

Claims (1)

[Claims] A paper feeding means that selectively enables cassette paper feeding and manual paper feeding with a single roller is provided in a paper feeding opening of an image forming apparatus main body into which a paper feeding cassette capable of manual paper feeding is loaded. Characteristic paper feeding device.