JPS6073554A - Image forming process kit of electrostatic copying machine - Google Patents

Abstract

PURPOSE:To improve the reliability of image quality security by constituting an electrostatic charger so that it can be attached to and detached from an image forming process kit housing. CONSTITUTION:The side view of a taken-out kit 1 including a photosensitive body and a charger 2 is shown in the figure. The kit 1 is provided with a cleaning device 4, a destaticizing electrode 41, a cleaning roller 42, and a cleaning blade 43 besides them. The charger 2, the photosensitive body 3, and the cleaning device 4 are collected functionally respectively to constitute the simple attachable and detachable kit 1. The charger 2 can be attached to and detached from the outside of the outer plate of the kit easily.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to an electrostatic copying machine, particularly an electrophotographic indirect method, in which an electrostatic image is created on the surface of a photoconductor and developed with toner. Involved in copying machines that transfer and fix images onto paper.

(Prior art) The majority of electrostatic copying machines use the electrophotographic indirect method, which is suitable for actual information processing, and their functions are becoming increasingly sophisticated, such as large processing capacity, speeding up, and editing functions. The reliability and ease of operation have been improved, and the ability of centralized treatment has increased.

On the other hand, with the trend of dispersion of information processing, copying machines became huts.
As various operations have been simplified, costs have declined and the number of machines installed has increased significantly, making it extremely difficult to satisfy users with the services provided by personnel who previously provided maintenance, inspection, and troubleshooting to copiers. Therefore, it is required that the person in charge be able to easily and quickly process the copying machine.

Furthermore, there is a trend toward multi-color copies, and there is an increasing need for users to simplify and reliably replace developer, and to prevent contamination of the installation environment in their own copying operations.

In response to this trend, particularly in small-sized copying machines, the copying function is divided into individual functions or multiple functions into a removable unit (process kit), or developers, etc. Cartridges have been developed, and furthermore, disposable systems have appeared for each predetermined amount of operation. For example, JP-A-57-21118
In No. 1, the casing housing the image forming mechanism can be separated, and the functional unit including the image carrier can be attached and removed to facilitate operation 1 maintenance and inspection. .

Part or all of the carrier and the image forming function are detachably attached to the main body of the copying machine, and the accuracy of mutual positioning when the attachment/detachment parts are attached is increased to improve image performance.

However, the technologies that have been disclosed so far have both advantages and disadvantages, and there are many areas that have not been addressed, and there are many points that need to be studied and improved, such as operability, image quality, and economical efficiency of copying a single image.

(Object of the Invention) Based on the above-mentioned circumstances, an object of the present invention is to provide a copying machine that increases the reliability of image quality assurance during image formation, and another object of the present invention is to provide a copying machine that is convenient for maintaining the charging function. The reason lies in the provision of equipment.

(Structure of the Invention) An object of the present invention is to provide an image forming process kit including at least a photoreceptor and a charger, so that the charger containing the charging electrode can be attached to and removed from the frame of the image forming process kit. It is characterized by a busy structure.

This can be achieved using an image forming process kit for an electrostatic copying machine.

In a preferred embodiment of the invention, the charger can be freely attached to the image forming process kit (hereinafter simply referred to as the kit) from outside the kit by applying projections and elastic members to the image forming process kit (hereinafter simply referred to as the kit) which has been removed from the main body of the copying machine. It is a form that can be fitted and removed.

Next, the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a schematic side view of the overall appearance of a copying machine equipped with a kit including at least a photoreceptor and a charger according to the present invention.

In the figure, M is the main body of the copying machine, E is a light source for illuminating the original, and L is a focusing light transmitter (trade name SELFOC Lens) that collects the reflected light from the original and projects it onto the photoreceptor. )
It is. D is a developing device 1D1 is a removable developer cartridge, and DH is a developing brush. C is a paper feeding device, C1 is a paper feeding roller, and CL, etc. are conveyance rollers. T! is the paper tray.

Further, d is a manual paper feeding section, which can be used when performing multiple transfers or adding transfers to the back side for a specific number of copies.

The fed paper transfers the toner image from the photoreceptor to the transfer electrode P.
1 by the receiving separation electrode P! The toner image is separated from the photoreceptor by the fixing and carrying-out device F, and
It is carried out and placed on the copy tray T.

FIG. 2 is a side view of the present invention when only the kit containing at least a photoreceptor and a charger is taken out. In FIGS. 2 and 1, 1 is a kit, 2 is a charger, and 3 is a photoreceptor. 4 is a cleaning device, 41 is a static elimination electrode, 42 is a cleaning roller, and 43 is a cleaning blade.

In the illustrated example, a charger 2, a photoreceptor 3, and a cleaning device 4 are functionally combined into a single detachable kit 1.
is formed. When removing the kit l from the main body M, it is preferable to pull it out from the front. In the illustrated example, the developing device is pivoted, and the developing brush D is retracted from the surface of the photoreceptor 30 in the direction of the arrow (FIG. 1). Also, the transfer electrode P1 and the separation electrode P! remains in the main body M.

, Next, in FIG. 3, a detachable charger 2 according to the present invention is shown.
Examples of preferred embodiments are shown below. The figure shows charger 2 and kit 1.
The figure shows the state in which it is pulled up from the cylindrical hole 12 provided in the outer casing plate 11 of. The charger 2 can be easily and securely fitted and removed from the outside of the outer casing plate 11, and when fitted, the charger 2
The charger 2 can be easily seated with high precision and good reproducibility by adjusting the positional relationship between the electrode fields provided in the photoreceptor 3 (FIG. 2).

In the figure, 21 is an electrode shield plate, and 211 is a seating collar for accurately and stably seating the charger 2. A fin 212 serves as a knob when attaching and detaching the charger, and also serves as a guide when the kit 1 with the charger 2 seated thereon is attached to the main body M.

Further, n and n' are fitting members made of insulating material provided at both ends of the charger 20, and 221 and 221 (not shown) are the outer casing plate 1.
A protrusion 222 for fixing the charger 2 by being engaged with an elastic member (described later) provided inside the charger 1! and 222 are tapers for fitting the charger 2 into the sieve hole ν.

Further, 231 is a cord connected to electrode B.

The fitting mechanism for seating the charger 2 on the kit 1 is shown in more detail in Figure M4.

FIG. 4(i) is a sectional view of the fitting portion when the charger 2 is seated. jll is an elastic member such as a leaf spring provided inside the outer casing plate 11 for locking the protrusion 221;
12 is a facing taper that is in contact with the taper 222.

FIG. 4(b) is a perspective view of the outer casing plate 11 and the inside of the sieve hole n when the charger is removed.

Due to the fitting mechanism of the row 5 charger 2 from the outside of the kit 1 described above, the charger 2 can be attached and detached easily and quickly and without causing any damage to other functional parts, which may interfere with charging. Contaminants caused by toner and other dust can be safely and completely removed, and the charging function is guaranteed, which directly improves the accuracy of obtaining good image quality and improves copying productivity.

It goes without saying that the present invention can take other forms than those exemplified above. For example, as shown in Fig. 5, the charger 2
The format for extracting by sliding & is shown.

The figure (a) shows the installed state, and the figure (b) shows the charger 2a.
FIG. 212a is a sliding part, another is a handle for convenience of extraction, 11a is an outer casing plate of kit 1, 11
3 is a guide groove of the sliding article 212a.

(Effects of the Invention) According to the present invention, the charger can be easily removed from the process kit, the charging property can be easily restored and maintained at all times, and the image quality on the charging surface can be guaranteed.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of an electrophotographic copying machine according to the present invention, FIG. 2 is a sectional view of a kit according to an example of the present invention, FIG. 3 is a perspective view of a charger according to the present invention, and FIG. 4 is a schematic side view of an electrophotographic copying machine according to the present invention. 5 is an explanatory diagram of a fitting portion of the charger, and FIG. 5 is an explanatory diagram of a separate embodiment. 1... Image forming process kit 2...
...... Charger 3... Self... Photoreceptor 4.
・・・・・・・・・Cleaning device agent Yoshimisuji Kuwahara 50 (α) ()]

Claims (2)

[Claims] (1) An electrostatic copying machine characterized in that, in an image forming process kit including a photoreceptor and a charger, the charger is configured to be detachable from a housing of the image forming process kit. Process kit for image formation. (2) The image forming process kit for an electrostatic copying machine according to claim 1, wherein the charger can be freely attached to and removed from the image process gift casing by means of a protrusion and an elastic member.