JPS5821262A - Image forming apparatus - Google Patents

Abstract

PURPOSE:To exactly execute positioning of a developing device, a cleaner, etc. on the basis of an image preserving material, by using the casing of a process kit capable of fixing them. CONSTITUTION:A photosensitive drum 3, a charger 4, a developing device 5, and a cleaner 13 are assembled into one body to form a process kit K. This has an upper casing 19 and a lower casing 20, and the drum 13, the charger 4, the device 5, and the cleaner 13 are fixed to the upper casing 19. After the completion of this fixation, the casings 19, 20 are joined into one body by means of adhesion or ultrasonic welding, thus permitting exact positioning of the developing device, the cleaner, etc. to be executed on the basis of the drum 3 by joining the lower casing 20 with the upper casing 19 after having fixed the drum 3, etc. on the casing 19.

Description

DETAILED DESCRIPTION OF THE INVENTION An MS forming device K11i such as an electronic copying machine or a recording machine is used.

At the company, I replaced the Kan9 body as an image carrier, replenished the toner, disposed of the waste toner, and cleaned the Tei*I11. However, for electronic copying machines that are small in size and intended for personal use, copying machines have been proposed that can be installed in a larger number than before and can be replaced, making maintenance easier.

The present invention is an improvement on the above-mentioned copying machine, and provides an image forming apparatus that is capable of accurately positioning, for example, a machine cleaner with respect to a photosensitive drum, and has excellent productivity. O Hereinafter, a copying machine using an embodiment of the present invention will be described using the first page.

FIG. 1 shows a sectional view of a copying machine body equipped with a process kit. In the figure, a document mounting table made of a 1Fi transparent member moves back and forth in the direction of the arrow.

2 is a short focal length small diameter condenser array;
The original image placed thereon is slit exposed onto the sensing drum S. A charger 4 uniformly charges the photosensitive drum 3. Due to this charging 1f) 4, on the other hand, the transfer paper P company
A registration roller 7 rotates with a tie 2 to register it with the paper feed roller 6 and 1iiiIII on the photosensitive drum 3.
The toner is forced onto the drum 6 by the transfer charger 8, and then transferred from the toner on the photosensitive drum s onto a transfer paper. Thereafter, the transfer paper P#'i is separated from the drum 5 by a separating means (not shown), guided to the fixing device 10 by the guide 9, and after the toner particles on the transfer paper are fixed, the paper is discharged onto the tray 12 by the paper discharge roller 11. be done.

Note that after the transfer, residual toner on the photosensitive drum 3 is cleaned by a cleaner 15.

Here, in this embodiment, a social photosensitive drum 3, a charger 4, a current charger 5,
and the cleaner 16 constitute a process kit K. This professional skin) K is the rail part of the rail 111111/js and Kira) K that are fixed on the copying machine main body side! -.14 can be slid and detached from the main body of the copying machine. In the J kit, when the main body is loaded into the stomach at a predetermined position, it is positioned and fixed by a locking means (not shown).

In addition, 15 companies currently use aerial rollers, with fixed magnets (
The IJ-tub rotates around the IJ-tube (not shown) to convey the toner and carry out one transfer. A magnetic plate 16 regulates the amount of toner coated on the developing roller 15. Both the *'tsa-ra 15 and the magnetic blade 16Fi are provided at the 1Ilik position 5. Further, 17 indicates a rubber blade for scraping off the toner on the sensing drum 3 and cleaning the surface of the photosensitive drum 5, and 18 indicates a scoop sheet for receiving the toner scraped off by the rubber blade 17. . Both the blade 17 and the scoop seam 181i are provided in the cleaner 13.

Now, number 19 is the upper case of the process kit, and number 20 is the lower case of the process kit. Above ↑ The rubber blade 17 fixed to the grade fixing member 21, the secondary charger 4m shield plate 22, the secondary charging wire 23, and the photosensitive drum 3 are attached to the upper housing 19 of this process kit. There is.

Among these, sensory drum 3 and current 1#! 15 rollers are rotatably supported. In addition, a scooping sheet 18 is fixed to the lower housing 20, and an upper transfer guide 24 is attached under the lower housing 20 so as to be integrally fixed on a rib. And this lower housing 20Fi,
It is joined and integrated with the upper housing 19 by adhesives, screws, ultrasonic welding, or the like. In the case of adhesive bonding, if the adhesive is applied to the entire adhesive surface of the casing and the casing is bonded, it is possible to prevent toner and the like from leaking from the casing.

25 is a perspective view showing the appearance of the upper housing 19 and the lower housing 20 of the process kit bonded and integrated using a known adhesive. There is an opening ↑ for performing image exposure on the 1st or 26th floor.It is a handle used when replacing the 26Fi process kit.
i. A driver fixing member for rotatably supporting the photosensitive drum 3 with respect to the positioning hole of the housing 19. Furthermore, the lower housing 20 shown in FIG. 2 (b) K is provided with openings 2 and 8 for transferring the toner on the photosensitive drum 3 onto a transfer paper.

Further, FIG. 3 shows a cross section of the process kit shown in FIG. 742(a). This is a developing roller support section that is integrally provided in the upper housing 19 of the 29 Company process kit. The developing roller 15 is positioned on this developing roller support portion 29 via a bearing (not shown).

Here, the method of attaching each component to the upper housing 19 and the lower housing 20 will be further explained using the drawings.

Figures 4 to 7 show how to install each part.

In addition, here is sister 4! lj process kit cross-sectional view, IR
Figure 5 is a #II sectional view, Figure 6 is a perspective view of the upper housing 19 of the process kit seen from below, and Figure 7 is a more detailed explanation of the belt. The developing roller 15tl has a bearing 30 attached thereto, and is attached to a support s29 provided integrally with the upper housing 19. The bearing of this support part 29 has a notch slightly smaller than the inner diameter of the coupling part 31 (6th Ij!J) F1, and by pushing the bearing 3o into the opening, the elasticity of the resin forming the housing 19 They fit together and are fixed.

Further, a rubber blade 17F1 is prepared in advance in a form integrated with the blade fixing member 21. Therefore, when assembling the process kit #i, insert the blade fixing member 21 into the groove 36 (sixth groove) of the blade support part 32 provided integrally with the upper housing 19.
After vertically aligning the holes in the shield plate 22, the bottles 35 are fixed by crushing them with heat (fourth hole).

Mani obi ware 4 emperor*i! 23 is fixed as shown in FIG. It is fixed to a spring 37, and is fixed by being pushed into the rib 38 of the upper housing 19 from above.

At this time, one end of the spring 37#i is used to apply tension to the wire, and the other end is used for connection with the high voltage connector. Also, the member 39 that determines the tensioning height of the wire 25 is
It is provided integrally with the upper housing 19. After the shield plate 22 and wire 25 are attached in this manner, the 7-piece 41 is adhered to the block portion 4o. That is, in this embodiment, nine ears 23 are stretched using a part of the upper body 19, and the housing 19 also serves as a corona discharge shield.

As described above, the bottle is attached to the upper casing 19 of each component. Finally, the photosensitive drum 3 is attached to the upper unit 19.

The method for attaching the photosensitive drum 5 to the upper housing will be explained below using the fifth example. FIG. 5 is a vertical sectional view of the process kit. In the figure, the photosensitive drum 3 has seven front lunges 42.
The end flange 45 is fixed. The photosensitive drum 5 is first inserted into the upper housing 19 from the bottom as shown by arrow A.
Insert it into the drum 1, then slide it to the right @, and press the drum 3.
The 7 langes 45 on the back side of the housing 19 are fitted together. By inserting the photosensitive drum 3 into the upper body 1 in this way, it can be used without being disturbed by the image roller 15, rubber blade 17, shield plate 22, or discharge device 4, which have been installed in advance. The screwdriver 3 can be inserted into the installation position without damaging the surface.

After that, manually attach the driver fixing member 27 to the housing 19.
By pushing in the fixing member 27 while fitting into the positioning hole 45 provided in the front 7 flange 42, the fixing member 27 and the front 7 flange 42 are fitted in a 14-position manner, and at the same time, the fixing member 27 and the upper housing 19 are fixed by the claws 44. Thereafter, the lower housing 20 is bonded and fixed to the upper housing 19 by adhesive means.

Therefore, according to this embodiment, when assembling the process kit, the upper housing 19 is exposed to the development cz --)15 am property V-)'16 @rubber blade 17 and shield plate 22@
Since the photosensitive drum 3 can be assembled after the Teiden wire 25 is assembled, the inspection process is simplified. That is, after assembling the above-mentioned parts other than the first sensing drum 5 into the upper casing 19, first inspect the tool drive, electric potential, etc., and when they pass, proceed to other installations! The tool drum can be replaced with the actual photosensitive drum 3 without changing b, and by installing the photosensitive drum 6 after the moth, it is possible to reduce the chances of the drum 3 being scratched.

As explained above, according to the Honjitsu Jllii example, the process killer, which has an integrated housing for the developing device, cleaner, etc. disposed around the photosensitive drum, has conventionally been used to position individual parts with respect to the drum. Since the casing of the process kit can be positioned with the precision of one, it becomes easy to position each component. Furthermore, by joining and integrating the housings of the developer, cleaner, etc., which were separate parts,
If the manufacturing process can be shortened, it will be possible to achieve cost reduction.

Further, as the cost of the kit decreases, for example, the process kit can be made disposable, making it possible to replenish the developer, collect waste toner, and replace the charging wire at the same time when replacing the photosensitive drum. In addition, since the operator does not have to scale the imager cleaner etc. each time the photoreceptor is replaced, it is possible to reduce toner scattering.9 Furthermore, the area around the photoreceptor drum is completely covered. Therefore, there is less risk of injury. In addition, the casing can be divided into parts so that they can be joined during assembly, and the casing can be finally joined and integrated after the photosensitive drum has been installed, making inspection during manufacturing easier. The photosensitive drum can be easily replaced when collecting and recycling the used process kit. As described above, according to this embodiment, it is possible to provide an image forming apparatus having a process kit that is excellent in not only operability but also productivity.

In addition, in the above-mentioned example, only an example in which the casing is divided into upper and lower halves is shown, but the present invention is not limited to this, and for example, a method of dividing it into left and right sides, a method of separating the front and back side plates, etc. But of course it doesn't matter. Furthermore, the present invention may be applied to systems other than the developing system, cleaning system, etc. mentioned in this embodiment, and may also be applied to systems using other systems of the present invention.

Furthermore, in this embodiment, a moth equipped with a process killer) K photosensitive drum, developing device, cleaner,
A part of these 5 parts may be left on the main body side, or a transfer charger or the like may be attached to the process kit. Further, the image carrier is not limited to a Mori-photosensitive drum, but may be one having an insulating layer, for example.

As described above, the present invention provides an image forming apparatus that can position, for example, a developing device, a cleaner, etc. with respect to an image carrier with high precision and has excellent productivity.

[BRIEF DESCRIPTION OF THE DRAWINGS] A sectional view of a copying machine using a process kit according to an embodiment of the present invention from Company 19, FIG. 2 (a perspective view showing the appearance of the anti process kit, FIG. 2(b) t' Figure 5 is a sectional view of the process kit, Figure 4 is a cross-sectional view of the process kit, Figure m5 is a longitudinal sectional view, Figure 6 is a perspective view, Figure 7 It is a sectional view showing how to attach the company's charging wire. In the figure, 1 original glass, 2 short focus small diameter imaging element array, 5 photosensitive drum book, 15 company development - part, 16 Fi magnetic blade, 17t' i rubber blade, upper casing of 19 company process kit, lower casing of 201d process kit, 22#i shield plate, 25#i charging wire, 24F!
Upper transfer guide, 27u driver fixing member, 29 Company developing roller support member, K is a process kit.

Claims (1)

[Scope of Claims] 0) An image carrier, an image forming means for forming an image according to information on the image carrier, and a part or all of the image carrier and the image forming means integrated together. What is claimed is: 1. A picture rear forming device comprising: a process kit that can be attached to and removed from a scissors main body; and a kit housing that constitutes the process kit, wherein the scissor kit housing can be joined during assembly.