JPS6250771A - Copying machine - Google Patents

Abstract

PURPOSE:To mold a fitting reference member and a guide member integrally with a main frame body which consists of a front and a rear panel and a bottom plate by forming the main frame body of an integral resin molding. CONSTITUTION:The main frame body 10 is molded of a synthetic resin material which has good heat resistance and high mechanical strength so that the front panel 11, rear panel 12, and bottom plate 13 are molded integrally by connecting both panels together by the bottom plate 13. An original platen installation surface 12a as the reference surface for a rail member 21 guiding the movement of a glass plate 22 is provided divisionally at plural necessary positions of the upper end part of the panel 12, and the glass plate 22 is mounted at the upper end of the panel 11 to form a slide surface 11a as a reference surface of slide contact. The insertion hole 11b for an image formation part 30 is bored in the panel 11 almost at its center part and guide holes 11c and 11e are formed nearby the insertion hole 11b to insert the image formation part 30 into the frame body 10 at a correct position. Thus, the fitting reference member, guide member, and frame body 1 are molded integrally to eliminate the need for a support and a guide member for many relay parts.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a copying apparatus such as an electrophotographic copying machine used for office purposes, which has an improved main body frame.

[Conventional technology]

Copying machines commonly used for office purposes are usually configured in a rectangular shape to make use of space during transportation and installation. consists of a main body frame in which the front and -1 panels are connected by a bottom plate, and each panel of the paper ejecting section and the paper feeding section attached from the left and right sides of the body frame, and the document table is installed in the open upper part of the body frame. However, the main body frame has conventionally been made by combining the separately processed metal panels and the bottom plate with screws or by spot explosion welding using surface-treated hills. It was assembled and formed.

[Problem that the invention seeks to solve]

On the other hand, in addition to the document table mentioned above, the body frame of the copying device needs to be provided with a mounting reference member, guide members, etc. for mounting and installing the optical system and image forming unit. It was impossible to integrally form each of these parts in the body, so the aforementioned mounting reference members and guide members had to be manufactured separately and additionally fixed to the main body frame. As a result, manufacturing the main body frame required many parts and assembly man-hours, and even small drips were reduced, accounting for a large proportion of the price of the copying device.

The present invention solves this problem and improves it by eliminating the need for assembling the front and rear panels and the bottom plate of the main body frame, and also integrates the above-mentioned mounting reference members and guide members into the main body frame. The object of the present invention is to provide a copying apparatus that can be configured.

[Means for solving problems]

The first object is achieved by a copying apparatus characterized in that a main body frame for the copying apparatus consisting of front and rear panels and a bottom plate is made of an integral resin molded product.

〔Example〕

An embodiment of the present invention is shown in FIG.

The figure shows the structure of the main body frame 1o in the copying apparatus of the present invention and the relationship between each member attached to the main body frame 10. The main body frame 10 is made of, for example, PPO (polyphenylene oxide). The front panel 11 and the rear panel I2 are connected by the bottom plate I3 and formed into a three-piece unit made of synthetic resin material with high mechanical strength. It becomes.

At important points on the upper end of the rear panel 12, there are provided document table installation surfaces 12a divided into a plurality of parts, which are reference surfaces for the rail members 21 that guide the movement of the glass plate n of the document table W. , the upper end of the front panel 11 has a sliding surface 11a serving as a reference surface on which the glass plate 22 is placed and comes into sliding contact.
is formed.

In other words, the silver-containing original is directly attached and fixed to the rail member 21 of the main body frame 1o on the original table mounting surface 12a without using other members, and the glass plate n is also placed directly on the sliding surface 11a. When the power of the copying device is transmitted to the silver-containing original, the original table I moves on the sliding surface 11 a Jl using the rail member 21 as a guide to perform exposure scanning of the original. It is now possible.

Further, in the central portion of the front panel 11, there is opened an insertion hole 11b for an image forming section I, which is separated from the main body of the copying apparatus and is detachably attached to the main body.

The image forming section 30 is a cylindrical container in which a photoreceptor drum, a charging electrode, a recording paper separation claw, a cleaning device, etc. are housed separately from the developing section, and the insertion hole 11.
When it is inserted into the main body frame 10 from b, it is mechanically and electrically connected to the copying machine so that the image forming process of the copying reservoir is shared. Note that the image forming section (equipment) may be integrally provided with a developing section.

Furthermore, three guide holes 11C11C%11e are provided in the vicinity of the insertion hole 11b of the front panel 11 as a reference means for attaching the image forming section 30 to the main body frame 10. By inserting the guide bin 3232a on the back side of 31, the image forming section 30 is configured to be inserted into the correct position within the main body frame 10 with extremely high accuracy, and its depth position is formed on the front surface of the front panel 11. Pair of left and right barrel mounting surfaces 11
d and the back surface of the flange portion 31, and these attachment reference means are designed to ensure that the above-mentioned mechanical and electrical connections are made appropriately.

On the other hand, the image forming portions 30 of the front and rear panels 11 and 12
Square holes 11e and 12e as reference holes through which both end portions 41 of the optical system unit (40) accommodating the convergent light transmitting body are inserted are bored at the location where the front and rear panels 11 are located. .12 has the square holes 1 on each inner side.
An L-shape facing each other and touching two sides of 1e and 12e,
Support portions or and 12f each having a reference surface are provided.

Therefore, if both ends 41 of the optical system unit 400 are placed on the supporting parts 11f and 12f, and the two sides are brought into contact with the reference plane and then fixed, the converging light transmitting body The original image is correctly focused and projected onto the circumferential surface of the photoreceptor drum in the image forming section 30.

Note that when the image forming section 30 is inserted into and removed from the main body frame 10, 53 and 54 serve to guide the insertion and removal by receiving the protrusions 33 and 34 provided on the image forming section 30, and also to support the weight of the image forming section 30. This is a mounting guide rail provided to support the WK and reduce the labor of the worker, and this is also the front and rear panel 1.
It is integrally molded so as to be installed between 1.1 and 12.

Further, 63 and 64 indicate the front and rear panels 11 and 12.
A pair of support plates 62, each of which is a holder portion integrally molded on the outer surface of the upper end and to which a socket 61 for the exposure illumination lamp ω is attached, are attached from the outside, so that the socket 61 can be attached to the main body frame lO. 2.Thereby, the exposure illumination lamp mark attached to the socket 61 can accurately illuminate the document surface included in the optical system unit 40 described above. It is now positioned as such. #
Although not shown, it goes without saying that a paper feeding device, a transfer/separation device, a conveying device, and a fixing device can be installed in the main body frame 10 depending on the molding surface.

〔Effect of the invention〕

As described above, in the present invention, since the main body frame 10 of the copying machine is integrally formed with a resin, the accuracy between the installation position of the document table 20 and the optical system unit composed of the convergent light transmitting body 41 can be adjusted. A stable image can be obtained because the distance between the convergent light transmitter 41 and the original silver can be set accurately without adjustment. In addition, since the paper feed section and the transfer conveyance section are also integrally attached to the main body frame 10, the distance between the transfer section and the photosensitive drum surface can be installed without adjustment. In this way, the shape of the main body frame used in copying devices has been modified to provide a reference surface suitable for the installation of each component or unit attached to it, as well as supporting parts and guide parts that required a lot of effort to assemble. etc. can now be molded in one piece, which eliminates the need for numerous relay parts, supports, and guide parts that were conventionally used to attach these parts and units.As a result, assembly work, especially automated assembly work, is simplified. It was hoped that a simpler, cheaper and more compact copying device would be provided.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a main body frame used in the copying apparatus of the present invention. lO... Main body frame 11... Front panel 11a
...Sliding surface 11b...Insertion hole 11C...
Guide hole lid...Body mounting surface 11e, 12e...
・Square holes 11f, 12f --- Support part 12a
...Original platen installation surface Nod...Original platen I...Image forming section 32...Guide pins 33, 34...Protrusions
40... Optical system unit 53.54... Mounting guide rail ω... Exposure illumination lamp 61... Socket 62... Support plate 63.64
...Holder part

Claims (4)

[Claims] (1) A copying device characterized in that the main body frame for the copying device, which includes front and rear panels and a bottom plate, is made of an integral resin molded product. (2) The main body frame for the copying apparatus is a frame having at least a reference surface on which an optical system, an original table installation surface, and an image forming section are installed, respectively. Copying device as described. (3) The copying apparatus according to claim 2, wherein the optical system is a converging light transmission body. (4) The copying apparatus according to claim 1, wherein an insertion hole for an image forming section is formed in a part of the front panel, and a mounting reference means is provided.