JPS59102261A - Manufacture of electrostatic recording device - Google Patents

Abstract

PURPOSE:To make an adjustment unnecessary at the time of installation by fitting in advance a spacer member to a developing device, cutting the spacer member so that a butt face of the front end of a developer carrying body and the spacer member becomes a prescribed value, and thereafter, fitting it to a device body. CONSTITUTION:When a spacer member for controlling an interval of a developer carrier and an electrostatic latent image forming body is fitted to a developing device on which the developer carrier is provided and the developing device is installed in an electrostatic recording device, a butt face of the spacer member is cut basing on the surface of the developer carrier so that the developer carrier and the electrostatic latent image forming body form a prescribed interval and thereafter, the developing device is installed to the electrostatic recording device. The butt face position of the spacer member is determined basing on a position of the developer carrier after the developing device is assembled, therefore, even if an error exists to some extent in dimensions of the developing device member, necessary dimensions are obtained exactly at the time of finish, and an adjustment at the time of installation to the body is unncessary.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to (t)) an improved manufacturing method for a space recording device, and more particularly, (1-5), the distance between the developer carrier and the electrostatic latent image forming member of the developing device can be easily and easily adjusted; This article relates to a manufacturing method for the 4-socket, which has been improved so that it can be set accurately.

In an electrostatic recording device using dry development, an electrostatic RU image formed on an electrostatic image forming body such as a photocardiographic light body in so-called electrostatic photography or a dielectric body in a multi-stylus method is used. On the other hand, development is carried out by bringing the developer supported on the turned-off developer carrier provided in the developing device into contact with each other to make the toner stick to the toner.

Generally speaking, a so-called magnet roller is used as a developer carrier, which has a plurality of loosely fixed rod-shaped magnets mounted on a rotatable non-magnetic sleeve. FIG. 1 is a schematic diagram of a developing device using a magnetic roller, where N1 is a main magnet, the other N or S is an auxiliary magnet, and 1
The sleeve rotates in the direction of the arrow. 2 is a 44 agent containing a magnetic substance that is attracted to the magnet and adheres to the surface of the sleeve 10 (thus forming a so-called magnetic brush, which moves as the sleeve rotates. First, the sleeve 1 comes into contact with the BI electrostatic image formed on the drum 4 near point A where it approaches the electrostatic latent forming member drum 4, and development is performed. This is the housing of the developing device.In addition, inside the developing device there is a developer stirring plate,
Although a toner conveying screw and the like are provided, they are omitted from the drawing.

The optimum [[J] varies depending on the properties, type, etc. of the developer, but in any case, extremely high precision is required in order to obtain a high quality image.

An example of an electrostatic copying machine currently on the market is d = 0.65 mm, and its WF capacity range is ±0.05.
mm, and precision on the order of 1/100 mm is required. If the distance d is wider or narrower than the optimum value, the quality of the developed image will be significantly reduced.

In addition, the developing device must be able to be easily removed from the electrostatic recording device main body for maintenance etc., and it must be able to be installed again.
a must always be reproduced with high precision. For this reason, a method has been adopted in which a spacer member is attached to the developing device, and the position of the developing device is determined by abutting against part of a stopper provided on a side plate that holds the electrostatic latent image forming drum, thereby keeping the distance d constant. Ta. FIG. 2 shows an example of how the developing device is attached by the above method. 21 is a developing device, 22 is a sleeve, 23 is a spacer member attached to both sides of the developing device, 24 is a side plate holding an electrostatic latent image forming drum 26, and 25 is a stopper portion. Next, the imager is mounted from the direction of the arrow, and is fixed at the position where the spacer member 23 hits the stopper part 25. Other earthworks for the developing device and members for holding and fixing the developing device in the left and right directions are provided (71) and are omitted from the drawing.

In the above structure, the distance from the abutment surface of the spacer part to the front end of the sleeve and h from the AiJ end of the stopper part are
't If the distance between the latent image forming drum and the front end of the side opposite to the sleeve is prepared with sufficient accuracy, when the developing device is installed, the distance d between the sleeve surface and the electrostatic latent image forming drum should be adjusted to the required distance. It is easy to maintain the accuracy within the range, and even when the developing unit is repeatedly attached and detached, a satisfactory reproduction accuracy can be obtained.

However, in a developing device that is made up of many parts that are assembled using many materials such as glass stick, even if the dimensional accuracy of each part is improved, the distance between the abutment surface of the spacer member and the front end of the sleeve after assembly cannot be maintained at a predetermined accuracy. It is difficult to finish the inner part, so in the past, the developing device was attached to the main body each time after assembly, the distance between the electrostatic latent image forming drum and the magnetic roller sleeve was measured with a thickness gouge, etc. The above problem was fixed by moving the screws or pasting a thin metal piece prepared in advance on the abutment part, but these operations required a lot of time and the skill of the miller, making it difficult to mass-produce the equipment. It was not suitable, and the compatibility of developing devices was also incomplete.

An object of the present invention is to provide a method for manufacturing an ij'J'I electrographic recording device that does not require the above-mentioned adjustment work that requires skill, and has compatible developing devices. This was achieved by cutting the spacer part so that the abutment m1 between the front end of the body and the spacer member was a predetermined value, and then attaching it to the main body of the 17iT electrographing apparatus.

First, according to the method according to the present invention, the position of the spacer member abutting surface 51 is determined based on α of the QH agent carrier after the developer is assembled. Even if there is a slight 4th difference, if the finish is 16, it will be a positive 46.
Due to the required dimensions, precision, and advantages, there is no need for cold adjustment at all when installing it to the main body.

FIG. 3 is a side view of the developing device finished by the above method, in which 31 is a spacer member made of gold, 32 is a magnet that is a developer carrier, 33 is a magnet roller shaft, and spacer = I. (The spacer member 1, which is the mounting member for tt, is first attached to a cylindrical member by cutting the helical portion C using the front end of the magnet roller and the point B as a reference to form an abutment surface.

The method and tools for cutting the abutting surface are not particularly limited, and any tool may be used as long as it can cut with high precision based on the front end of the developer carrier. , an example of a preferred processing machine for this purpose is shown in No. 4N. The processing machine has a stopper 41 that determines the position of the developing device to be processed, a cutting tool 42, and a drive 1 that drives the cutting tool 42.
- a motor 43 for raising and lowering the cutting tool 42 and the drive motor 43, a unit 44 for raising and lowering the cutting tool 42 and the drive motor 43, a circle 1 motor 45 for raising and lowering the 44, and restraints 46 and 47 for fixing the developing device to be processed from above and from the rear. Processed first developing device 48
A magnetic roller 49, which is a developer carrier installed in the container, is placed against the stopper 41 and fixed onto the processing machine using the diagonal inserts 46 and 47. The cutting tool 42 is rotated and lowered to cut the spacer part 50. Stopper 4
If the distance between the surface 10 and the cutting surface of the cutting tool 42 is adjusted to a certain value tXd in advance, an abutment surface with a predetermined distance from the front end of the magnet roller 49 will be formed on the developing spacer member 51. be done.

A large number of electrostatic copying machines have been assembled using developing units manufactured by the method described below, but they have not been able to achieve the required dimensions and accuracy without making any post-adjustment between the developing magnet roller and the photoreceptor drum. The results showed that there was no variation in performance, proving the usefulness of the present invention.

This can be ensured by increasing the processing and assembly accuracy of the electrostatic image forming body by 1% on the main body side, that is, on the side of the electrostatic image forming body after assembly using the method of the present invention. Of course, it is possible and preferable to form the stopper Li17 by cutting using the front Q as a reference.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of a developing device using a magnetic lobe, Figure 2 is an explanatory diagram showing the device and state of the developer, Figure 3 is a schematic diagram of the spacer abutting part of the developer, and Figure 4 is a diagram of the developing unit. This is a schematic diagram of a processing machine that cuts the spacer abutting portion of a container.
14 image forming body, 22, 33. 49... Magnet roller, 23, 31.50...
Spacer member. Agent: Kuwahara 5 Tesse Beautiful Procedural Amendment Patent Jj Chief'1) Kazuo Wakasugi 1 Case Display Showa 57;14 Cr;I'l Application No. 213615
No. 25'? : Ming name Manufacturing method of electrostatic recording device 3 Supplementary information Relationship to the incident Patent applicant address Tokyo 1-26-24 Nishi-Shinjuku 1-chome Name (1271 Konishiroku Photo Industry Co., Ltd.) J (Director Nobuhiko Kawamoto 4 Agent Address: 191 Jsu 1 Tokyo L1 Noichi Sakuri-cho 1'ili
'Jikonishiroku Shasei, Kogyo Co., Ltd. 6, Subject of amendment (1) Figure 1 of the drawing (2) "Detailed description of the invention in specification 1 and brief description of the drawing" 7. Amendment Contents (1) As per the amendment attached to the drawing (2) Amendment in the specification (1) The third line of page 3 of the specification states that "the magnetic brush is set up by the regulating plate 3".
``The magnetic brush is corrected to ℃ by the spike control plate 3. (2) Specification Luga page 6, line 18 to added line ``The spacer member 1 is a cylindrical member first, and the dotted line part C is the front end of the magnet roller, and the abutting surface is formed by cutting with point B as a reference." The cut AIJL abutment surface is formed using the point as a reference.'' (3) Clearly) Page 7 of the letter, line 13, says "insert 46.47", "retainer 46.47"
It is a different type. (4) On the bottom line of page 8 of the specification, the text "22.33," is corrected to "r22,32,". Figure 61

Claims (2)

[Claims] (1) In a method for manufacturing an electrostatic recording device having an electrostatic latent image forming member and developer carriers arranged sparsely at regular intervals from the electrostatic latent image forming member, the developer carrier is The above developer carrier and the above electrostatic charge are used in the developing device. 1・i
Attach a spacer member to control the distance from the image forming body,
When the developing device is installed in the electrostatic recording device, the abutment surface of the spacer member is set with respect to the surface of the developer carrier so that a predetermined distance is formed between the developer carrier and the electrostatic latent image forming body. A method for manufacturing a W' electrostatic recording device, characterized in that after cutting, the developing device is mounted on the electrostatic recording device. (2) Regulation of the distance between the developer carrier and the electrostatic latent image forming member
The spacer is fixed to the developer,
and has an abutment surface that regulates the above-mentioned distance between the first and second cut surfaces.
An electrostatic recording device having the above-mentioned developing device.