JPH0623875B2 - Copying device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a copying apparatus such as an electrophotographic copying machine used for office work, and a copying apparatus having an improved main body frame.

[Conventional technology]

Copying devices generally used for office work usually have a rectangular parallelepiped shape so that they can be used for space utilization during transportation and installation. The front and rear panels are connected to each other by the bottom plate, and the main frame is composed of the discharge and paper feed panels that are attached from the left and right sides of the main frame. However, such a body frame has conventionally been assembled integrally by screwing or spot welding etc. after surface-treating each panel made of metal plate and the bottom plate which have been separately processed. Was formed.

[Problems to be solved by the invention]

On the other hand, in the body frame of the copying machine, in addition to the above-mentioned document table, it is necessary to provide a mounting reference member, a guide member, etc. for mounting the optical system and the image forming unit. It was impossible for the body to integrally form each of these members.

Therefore, the attachment reference member and the guide member described above must be manufactured separately, and additionally fixed to the main body frame.As a result, many parts and assembling steps are required to manufacture the main body frame. The yield was also low, and the cost of the copying machine was large.

The present invention has solved and improved this point, and as a result, in front of the main body frame,
It is an object of the present invention to provide a copying apparatus in which the rear panel and the bottom plate are not required to be assembled, and the above-mentioned attachment reference member and guide member can be integrally formed with the main body frame.

[Means for solving problems]

The above-mentioned object is to form a body frame for a copying machine, which is composed of a front panel and a rear panel, and a bottom plate as an integral resin molded product,
On the upper surface side of the front and rear panels, an optical system at least including an illumination lamp for exposure and a converging light transmission body, and a reference surface on which a rail member of a document table should be installed are formed. This is achieved by a copying apparatus characterized in that a part of the panel is provided with an insertion hole for an image forming portion including a photosensitive drum, and mounting reference means for the inserted image forming portion is provided.

〔Example〕

 One embodiment of the present invention is shown in FIG.

The figure shows the relationship between the configuration of the main body frame 10 and each member attached to and installed in the main body frame 10 in the copying apparatus of the present invention.

The main body frame 10 connects the front panel 11 and the rear panel 12 with a bottom plate 13 by a synthetic resin material having high heat resistance and high mechanical strength such as PPO (polyphenylene oxide) resin or ABS resin containing glass fiber. It has been molded into one.

An original table installation surface 12a, which is a reference surface of a rail member 21 that guides the movement of the glass plate 22 of the original table 20, is provided at a plurality of points at the upper end of the rear panel 12 while being divided into a plurality of parts. At the upper end of the front panel 11, a sliding surface 11a is formed as a reference surface on which the glass plate 22 is placed and slidably contacts.

That is, the original table 20 has its rail member 21 directly attached and fixed to the original table installation surface 12a of the main body frame 10 without any other member, and the glass plate 22 is also directly placed on the sliding surface 11a. When the power of the copying machine is transmitted to the document table 20, the document table 20 uses the rail member 21 as a guide to move the sliding surface.
The exposure scanning of the document can be performed by moving on 11a.

Further, an insertion hole 11b of the image forming unit 30 which is separated from the main body of the copying apparatus and is detachably attached to the main body of the copying machine is formed at a substantially central portion of the front panel 11.

The image forming section 30 is a cylindrical container in which a photoconductor drum, a strip electrode, a recording paper separating melon, a cleaning device and the like are separately housed in a developing section, and the main frame 10 is inserted from the insertion hole 11b. When it is attached to the copying machine, the copying machine is mechanically and electrically connected to share the image forming process for copying. The image forming unit 30 may be integrally provided with a developing unit.

Further, three guide holes 11c11c, 11e are provided in the vicinity of the insertion hole 11b of the front panel 11 as a mounting reference means of the image forming unit 30 to the main body frame 10, and the rear surface of the flange portion 31 of the image forming unit 30 is provided. The image forming portion 30 is configured to be inserted into a proper position in the main body frame 10 with extremely high accuracy by fitting the guide pins 32 32a of the left and right, and the depth position thereof is formed on the front surface of the front panel 11 by a pair of left and right sides. The contact between the body-attached surface 11d and the rear surface of the flange portion 31 is regulated so that the mechanical and electrical connections described above are properly performed by these attachment reference means.

On the other hand, square holes as reference holes into which both side end portions 41 of the optical system unit 40 accommodating the converging light transmitting member can be inserted at a position directly above the image forming portion 30 of the front and rear panels 11 and 12.
11e and 12e are perforated and further front and rear panels are provided.
A support part 11 having L-shaped reference surfaces on the inner surfaces of 11 and 12 in contact with the two sides of the square holes 11e and 12e and facing each other.
f and 12f are provided respectively.

Therefore, the both side end portions 41 of the optical system unit 40 are connected to the support portion.
When placed on 11f and 12f respectively, and fixed with the two sides abutting against the reference surface, the original image formed by the converging light transmitting member is correctly formed on the peripheral surface of the photosensitive drum in the image forming section 30. It is designed to be projected as an image.

Incidentally, 53 and 54 receive the protrusions 33 and 34 provided on the image forming section 30 when the image forming section 30 is inserted into and removed from the main body frame 10, and guide the insertion and removal and also the weight thereof. This is a mounting guide rail provided to support and reduce the labor of the operator, and is also integrally formed so as to be installed between the front and rear panels 11 and 12.

Further, 63 and 64 are holders integrally formed on the outer surfaces of the upper ends of the front and rear panels 11 and 12, respectively, and are a pair of support plates 62 to which a socket 61 for the exposure illumination lamp 60 is attached. By mounting from the outside, the socket 61 can be opposed to the inside surface of the main body frame 10. As a result, the exposure illumination lamp 60 attached to the socket 61 is positioned so that the document surface included in the optical system unit 40 described above can be illuminated appropriately. Although not shown, it is needless to say that a paper feeding device, a transfer device, a separating device, a transporting device, and a fixing device can be installed in the main body frame 10 according to the molding surface.

〔The invention's effect〕

As described above, according to the present invention, since the main body frame 10 of the copying machine is integrally formed of resin, the accuracy between the installation position of the document table 20 and the optical system unit composed of the converging optical transmission body 41 is extremely high. Good, especially the characteristic of the converging optical transmission body 41
It is possible to prevent an image defect that occurs due to a distance adjustment mismatch with 20. Furthermore, since the distance between the converging optical transmission body 41 and the surface of the photoconductor drum of the image forming section 30 can be set accurately without adjustment, a stable image can be obtained. In addition, since the paper feeding unit and the transfer / conveyance unit are integrally attached to the main body frame body 10, the distance between the transfer unit and the photosensitive drum surface can be set without adjustment. Thus, the shape of the main body frame used in the copying machine has a reference surface adapted to the mounting device of each constituent member or unit to be mounted on the main body frame, and a supporting portion, a guide portion, etc., which required a lot of labor for assembling. Since it is also possible to mold it integrally, it eliminates the need for numerous relay parts, supports, and guide parts that were conventionally used for mounting these members and units, resulting in easy assembly work, especially automatic assembly work. It is now possible to provide a compact and inexpensive copying machine.

[Brief description of drawings]

FIG. 1 is a perspective configuration diagram of a main body frame body used in the copying apparatus of the present invention. 10 …… Main body frame, 11 …… Front panel 11a …… Sliding surface, 11b …… Insertion hole 11c …… Guide hole, 11d …… Body mounting surface 11e, 12e …… Square hole, 11f, 12f …… Support Part 12a …… Original plate installation surface, 20 …… Original plate 30 …… Image forming part, 32 …… Guide pin 33,34 …… Projection, 40 …… Optical system unit 53,54 …… Installation guide rail 60… … Lighting lamp for exposure 61 …… Socket, 62 …… Support plate 63,64 …… Holder part

Claims (1)

[Claims] 1. A main body frame for a copying machine, which comprises front and rear panels and a bottom plate, is molded as an integral resin molded product,
On the upper surface side of the front and rear panels, an optical system at least including an illumination lamp for exposure and a converging light transmission body, and a reference surface on which a rail member of a document table should be installed are formed, respectively. A copying apparatus, wherein an insertion hole of an image forming portion including a photosensitive drum is formed in a part of the panel, and mounting reference means for the inserted image forming portion is provided.