JPS61111250A - Paper feeding device for electrostatic photograph printer - Google Patents

Abstract

PURPOSE:To facilitate maintenance and servicing, by a method wherein a cover having a paper feed cassette and a paper feed roller is rotatably coupled to a base, a paper guide is formed with the base and the guide plate of the cover, and the locking body of the cover is engaged with the cassette. CONSTITUTION:A base 2, having an upper surface being open, and a cover 3, having an under surface being open, are rotatably intercoupled to form a casing 1. A paper feed cassette 20 is slidably held in a recess part 21 in the back of the upper surface of the cover 3 and a frame 7 is held rotatably around an axis 5 serving as a fulcrum. Guide plates 23 and 24 are formed in the recess part 21, a guide plate 25, held to the drum frame 7 and positioned facing the lower of the plate 24, is located to the base 2 and the guide plate 26 is situated thereunder to form a paper guide 27. A rotatable locking body 29, engaged with a pore in the bottom of the cassette 20, is attached to the upper part of the cover 3. The cover 3 and the frame 7 can be opened, and this facilitates servicing and disposal of jam.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a paper feeding device for an electrostatographic printer.

Conventional technology What is the paper feeding method for traditional electrostatographic printers?

Generally, this is done by attaching a paper feed cassette to the side of the printer's housing.

Problems to be Solved by the Invention Therefore, there is a drawback that the paper feed cassette largely protrudes from one side of the housing, resulting in a large installation area.

Some models have a paper cassette placed at the bottom of the housing, but since the vertical installation distance between the transfer unit and the paper cassette is small, the paper pulled out from the paper cassette is bent with a small radius of curvature to make a U-turn. For this reason, it is difficult to advance the paper straight between the photoreceptor and the transfer section, which poses a problem that may impede printing.

This invention was made in view of these points.

The purpose is to develop a paper feeding device for electrostatic photographic printers that can significantly reduce the installation area.

Means for Solving the Problems This invention provides a paper feed cassette 2o and a paper feed roller 22 in the upper part of the housing 1, and guides the paper 33 pulled out from the paper feed cassette 2o by a paper guide 27 to feed the paper. The transfer unit 18 transports the image to the transfer unit 11 .

In addition, the cover 3 is rotatably connected to the base 2 to form the housing 1.
This cover 3 is provided with a paper feed cassette 20 and a paper feed roller 22.

Furthermore, a guide plate 25 provided on the base 2 and a guide plate 24 provided on the cover 3 are made to face each other to form a paper guide 27.

Furthermore, a locking body 29 that engages with the paper feed cassette 20 is provided on the cover 3.

Furthermore, a switch 31 interlocked with the operation of the locking body 29 is provided on the cover 3.

Effect: Therefore, by providing the paper feed cassette 2.0 in the upper part of the housing 1, it is possible to significantly reduce the floor space. In addition, by rotatably connecting the cover 3 to the base 2 to form the casing 1, inspection can be facilitated by opening the cover 3. Furthermore, a guide plate 2 provided on the base 2
5 and a guide plate 24 provided on the cover 3 to form the paper guide 2 f, the cover 3 is opened to release the paper guide 27, thereby making it possible to easily handle jams. Further, the locking body 29 allows the paper feed cassette 2 to
0 can be maintained to prevent the paper feed cassette 20 from sliding down when the cover is opened. Furthermore, the paper feed cassette 20
When the locking body 29 is not present, the locking body 29 is displaced, but the switch 31 is linked to this operation, and a signal indicating that the paper feeding force set 20 is not installed is obtained.

Example An embodiment of the present invention will be described based on the drawings.

l is a housing. This housing 1 has a box-shaped base 2 with an opening on the top and a box-shaped cover 3 with an opening on the bottom, which are rotatably connected by a support shaft 4.
and the cover 3 are removably connected by a clamp (not shown). Also.

The base 2 has a drum frame 7 that rotates around a support shaft 5, is urged downward by its own weight, and is positioned by a stopper 6.

A cylindrical photoreceptor 8 is connected to a motor (not shown) and rotatably supported on a portion of the base 2, that is, the drum frame 7.

A charging section 9 and a toner supply section 1 are arranged along the outer circumference of the photoreceptor 8.
0, a transfer section 11, a lamp 12, and a cleaning section 13 are attached. Further, the base 2 includes a fixing roller 14 as a fixing section, an ejection roller 15, a pressure roller 16 that is in pressure contact with the ejection roller 15, a motor 17 that drives the ejection roller 15 and the fixing roller 14, and a paper feeding section. 18
is provided.

! Further, on the back side of the upper surface of the cover 3, a light source section 19 is provided that irradiates the photoreceptor 8 with a laser beam to perform optical scanning.
is held, and the paper feed cassette 2 faces the light source section 19.
A recess 21 is formed to slidably hold 0. A paper feed roller 22 connected to a motor (not shown) is provided at the back of the recess 21 . Furthermore, cover 3
A guide plate 23 hanging from one end of the recess 21 and a long guide plate 24 are formed on one side, and a guide plate 25 is formed on the base 2 and is held by the drum frame and faces the lower part of the guide plate 24. A guide plate 26 facing the lower part of this guide plate 25 is provided, and these guide plates 23
26 form a paper guide 27.

Furthermore, a locking body 29 is rotatably attached to the top of the cover 3 and is biased by a spring 28 and engages with a small hole in the bottom of the paper feed cassette 20. An actuator 30 is in contact with this locking body 29. The switch 31 having the bracket 32
It is attached to the cover 3 via.

In such a configuration, the photoreceptor 8 is rotated once.
In the process of fading, a charged layer is first formed on the outer periphery of the photoconductor 8 by the charging section 9, and a laser beam from the light source section 19 is scanned on this charged layer to form an electrostatic latent image, and the toner supply section 1O
The electrostatic latent image is visualized by supplying toner from the electrostatic latent image. on the other hand,#
The paper 33 pulled out from the paper feed cassette 20 by the paper roller 22 is guided by the paper guide 27 and sent to the lower part of the photoconductor 8 by the paper feeding section 18, and then the toner image on the photoconductor 8 is transferred by the transfer section 11. The image is then fixed by the fixing roller 514, and further discharged by the discharge roller 15 and the presser roller 16.

- After the transfer, the electrostatic latent image remaining on the photoreceptor 8 is erased by the light of the lamp 12, and the remaining toner is wiped off by the cleaning section 13.

In this way, since the paper feed cassette 20 is provided on the upper surface of the cover 3, the installation area can be significantly reduced. Further, the cover 3 can be opened using the support shaft 4 as a fulcrum, and the drum frame 7 can also be opened using the support shaft 5 as a fulcrum, so inspection and jam removal can be easily performed. Furthermore, since the guide plate 24 facing the guide plate 25 rises when the cover 3 is opened, a part of the paper guide 27 can be opened and even if the paper 33 is jammed in the paper guide 27, it can be easily taken out. can.

Furthermore, even if the cover 3 is opened, the paper feed cassette 20 is held by the locking body 29, so it will not fall off.If the paper feed cassette 20 is not attached, the locking body 29 It rotates clockwise and the switch 31 issues a switching reready signal.

Thereby, it is possible to warn that the paper feed cassette 2o is not installed.

Effects of the Invention As described above, in this invention, the paper feed cassette is arranged at the top of the housing, so the installation area can be significantly reduced.In addition, since the housing is formed by the cover and the base, the cover When the cover is opened, inspection work and jam removal can be easily performed.Furthermore, the guide plate provided on the base and the guide plate provided on the cover face each other to form a paper kite, so that when the cover is opened, The paper guide can be opened to easily remove the paper jammed in it, and
When the cover is opened, the locking body can prevent the paper feed cassette from sliding down, and by providing a switch that is linked to the operation of the locking body, it is possible to warn that the paper feed cassette is missing. It has the following effects.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a vertical side view showing the printing state, FIG. 2 is a vertical side view showing the cover opened, and FIG. 3 is a reduced perspective view. 6 1... Housing, 2... Pace, 3... Cover, 8...
... Photoreceptor, 10... Toner supply section, 11... Transfer section, 14... Fixing roller (fixing section), 18... Paper feeding section, 20... Paper feeding cassette, 22...・Paper feed roller,
24, 25...Guide plate, 27...Paper guide, 2
9...Latching body, 31...Switch procedure amendment CM March 28, 1985 Manabu Shiga, Commissioner of the Patent Office 2, Name of invention Paper feed device for electrostatic photographic printer 4, Agent 〒 107 Seishin 5-9-15 Minami-Aoyama, Minato-ku, Tokyo 1985 2
Month 26th (shipment date) 6. Subject to correction

Claims (1)

[Scope of Claims] 1. A housing including at least a photoconductor on which an electrostatic latent image is formed, a toner supply section, a transfer section, a fixing section, and a paper feeding section located near the bottom of the photoconductor; A paper feed cassette is provided in the upper part of the casing, and a paper feed roller that pulls out the sheets stacked in the paper cassette is rotatably connected to a drive unit, and A paper feeding device for an electrostatic photographic printer, characterized in that a paper guide is provided from a paper feeding roller to the paper feeding section. 2. A housing is provided that includes at least a photoconductor on which an electrostatic latent image is formed, a toner supply section, a transfer section, a fixing section, and a paper feeding section located near the bottom of the photoconductor, and the housings are arranged perpendicularly to each other. It is formed by a base and a cover that are rotatably connected in a plane, and a paper feed cassette is provided on the upper surface of the cover, and a paper feed roller that pulls out sheets stacked in the paper feed cassette is connected to a drive unit. 1. A paper feeding device for an electrostatic photographic printer, characterized in that the paper feeding device is rotatably provided for an electrostatic photographic printer, and a paper guide is provided along an inner surface of the casing from the paper feeding roller to the paper feeding section. 3. Provide a housing having at least a photoconductor on which an electrostatic latent image is formed, a toner supply section, a transfer section, a fixing section, and a paper feeding section located near the bottom of the photoconductor, and the housings are arranged perpendicularly to each other. It is formed by a base and a cover that are rotatably connected in a plane, and a paper feed cassette is provided on the upper surface of the cover, and a paper feed roller that pulls out sheets stacked in the paper feed cassette is connected to a drive unit. and a guide plate provided on the inner surface of the base and a guide plate provided on the inner surface of the cover are arranged to face each other to form a paper guide extending from the paper feed roller to the paper feeding section. Features of electrostatic photographic printer paper feeding device. 4. A housing including at least a photoconductor on which an electrostatic latent image is formed, a toner supply section, a transfer section, a fixing section, and a paper feeding section located near the bottom of the photoconductor is provided, and the housing is arranged vertically to each other. A paper feed cassette is provided on the upper surface of the cover, and a paper feed roller for drawing out sheets stacked in the paper feed cassette is connected to a drive unit. a locking body rotatably provided, a paper guide extending from the paper feed roller to the paper feeding section along the inner surface of the casing, and elastically engaged with the paper feed cassette at an upper part of the cover; A paper feeding device for an electrostatic photographic printer, characterized in that the paper feeding device is provided so as to be biased in one direction so as to be freely displaceable. 5. Provide a housing having at least a photoconductor on which an electrostatic latent image is formed, a toner supply section, a transfer section, a fixing section, and a paper feeding section located near the bottom of the photoconductor, and the housings are arranged perpendicularly to each other. It is formed by a base and a cover that are rotatably connected in a plane, and a paper feed cassette is provided on the upper surface of the cover, and a paper feed roller that pulls out sheets stacked in the paper feed cassette is connected to a drive unit. a paper guide extending from the paper feed roller to the paper feed section along the inner surface of the casing, and a lock resiliently engaged with the paper feed cassette at the top of the cover; 1. A paper feeding device for an electrostatic photographic printer, characterized in that the body is biased in one direction so as to be freely displaceable, and the cover is provided with a switch that operates in conjunction with the operation of the locking body.