JPS6066266A - Copying machine divided into two - Google Patents

Abstract

PURPOSE:To make maintenance easy by providing an aperture, which faces a developing device installed in a machine body separately from a unit including a drum, cleaning box, etc., in the unit. CONSTITUTION:In a figure, an upper body 21a of a copying machine 21 divided into two is rotated clockwise with a hinge H as a fulcrum to open a paper feeding path in a lower body 21b to its almost full width. In this state, the correcting work of feed defects of recording paper in the copying machine 21 is made very easy; and further, the structure of the copying machine 21 divided into two is utilized to facilitate attaching and detaching individual functional parts stored in the upper body 21a. That is, a photosensitive drum 25 whose periodically replacement is necessary, a cleaning blade 37 which is worn considerably, etc. are stored as a unit in one case 40, and it is sufficient if this case 40 isd inserted to the upper body 21a for replacement.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a two-part copying machine in which a specific plurality of members are attached and detached as a unit.

[Prior art]

The internal functions and their arrangement in a general electrophotographic copying machine are as shown in FIG.

In the figure, a sheet of recording paper P is delivered one by one by a first paper feed roller 2aK from a paper feed cassette 2 installed in a copying machine 1. After passing through a conveyance roller 3 and being reversed, it reaches a second paper feed roller 4, and then reaches the second paper feed roller 4. The timing and conveyance speed are adjusted so that the leading edge coincides with the leading edge of a toner image formed on a photoreceptor drum 5, which will be described later.

On the other hand, prior to this, the photosensitive drum 5, which is uniformly charged on its surface by the charging electrode 6VC and rotates in the direction of the arrow,
An image of a document moving horizontally in synchronization with the circumferential speed of the photosensitive drum 5 is sequentially statically projected onto its circumferential surface by an exposure lamp 7 and a focusing photoconductor (for example, SELFOC lens, trade name) 8. A latent image is formed.

As the latent image on the photosensitive drum 5 continues to rotate, it is developed into a toner image by the developing sleeve 9a of the developing device 9, and becomes visible.

The photosensitive drum 5 further rotates and combines with the recording paper P described above, and after the toner image on the photosensitive drum 5 is transferred to the recording paper P by the transfer pole 10, the recording paper P is separated at the dividing pole 11. , liberate you.

The separated recording paper P is fed to the fixing roller 13 via the conveyance roller 12, and after the toner image is melted and fixed, the paper P is copied from the ejection port 15 by the paper ejection row 14. (not shown).

Further, after separating the recording paper P, the photosensitive drum 5
After further rotation in the direction of the arrow and the charge is removed by the removal electrode 16, the cleaning device 17 scrapes off the untransferred residual toner adhering to the photoreceptor drum 5. The scraped toner is stored in the cleaner box 18. On the other hand, the photosensitive drum 5 is again subjected to charge by the charging electrode 6 in order to form an electrostatic latent image based on the next document.

In addition, when manually feeding 19cm, the recording paper insertion slot is 31cm.
This is the first feeding roller.

As described above, one of the most common and difficult-to-treat problems in the mechanism and operation of a copying machine is recording paper feeding failure, that is, jamming. Therefore, for example, a copying machine having a structure in which the copying machine 1 is divided into upper and lower parts approximately at the paper feed path as a boundary for jam clearance, and the upper main body 1a is openably and closably connected to the lower main body 1bl'C by a hinge HK, is used. Special Public Service 1986
-40827.

By configuring the copying machine 1 in such a way that it can be opened and closed so that the inside can be opened, it not only becomes easier to clear the jam as described above, but it is also convenient for inspecting each functional part and replacing repair parts. However, each of the conventional functional parts is
Because they are assembled regardless of the frequency of attachment and detachment for maintenance and inspection, parts that often need to be removed are attached by a very time-consuming process, and conversely, they rarely require inspection or replacement. There are examples where parts are installed so that they can be easily attached and detached.

This configuration of the copying machine requires a large amount of expense for long-term maintenance and management, resulting in a loss of labor.

[Purpose of the invention]

It is an object of the present invention to improve a two-part copying machine in which functional parts of the copying machine that are frequently inspected and replaced can be easily attached and detached.

[Structure of the Invention]' The present invention has a structure in which functional parts such as a drum, a cleaning machine, a cleaner box, etc. in a two-part copying machine are housed in a removable case to form a unit, and the above object is achieved. In addition, in a two-part copying machine that can be divided into two parts upwardly and opened, and in which a unit including at least a drum, a cleaning unit, and a cleaner box is detachable from the main body of the copying machine when divided into two parts, This is achieved by a two-part copying machine characterized in that the unit is provided with an opening facing a developing device installed in the main body separately from this unit.

〔Example〕

One embodiment according to the invention is shown in FIGS. 2 and 3.

In FIG. 2, the upper main body 21a of the two-part copying machine 21 rotates clockwise about the hinge ■i, and is supported by a stay, etc. (not shown), and the paper feeding path in the lower main body 21b is almost the same. Indicates an open state.

This makes it extremely easy to correct paper feeding failures in the copying machine 21, and furthermore, in the present invention, by utilizing the structure of the two-part copying machine 21, the upper main body 21a is Each housed aircraft f)1
The aim is to simplify the attachment and detachment of parts.

That is, in the present invention, the photoreceptor drum 5, which requires periodic pre-pressure replacement due to deterioration of characteristics due to a large number of copies,
The cleaning blade 37, which is also subject to significant wear, and the cleaner box, which cannot be made large due to space constraints and must be used to remove collected toner frequently, are housed in one case 40 to form a unit. By inserting and mounting into the upper main body 1a, the photoconductor tram 5, the cleaning blade 37 and the copying machine 1
It is configured to be connected to the corresponding functions within each.

On the other hand, the optical system including the focusing photoconductor portion disposed in other parts of the upper main body 1a and the developing device 29 have a relatively long life, and are necessary for capturing developer in the developing device portion. Since there is less need for maintenance or replacement, it is better to fix the IJLGC directly on the upper body, and on the lower body 1b, the transfer pole (capital) and separation pole
The first electrode is fixed to the lower main body 1bK because it requires almost no inspection and the recording paper passes between the second electrode and the photosensitive drum 5.

Therefore, in order for each functional part in the case 40 to perform the copying function in cooperation with the above-mentioned parts directly fixed to the upper main body 1 unit or the lower main body 1b, the 8 It is necessary to provide a mouth.

That is, in the present invention, the case 40 r! is a unit housing the photoreceptor drum δ, the cleaning blade 37, and the cleaner box blade. , as shown in FIG. 3, is formed into a rectangular tube shape, and at predetermined positions on the side thereof are an opening for n-light (Slin) sl, and an opening for facing the developing sleeve 291 for development (Slin) S2. Furthermore, openings, ie, slits S3, are provided for transfer, separation, static elimination, etc., respectively.

In addition, the case 40J''ll: can be easily inserted and removed along a guide rail (not shown) provided in the upper body la by a handle provided at the front end of the case 40J''ll; The system is now connected.

Since the case 40 is positioned at the normal setting position by the guide rails etc. during insertion, the case 40 has such openings (Slin) Sl, S2. By providing S3, a regular positional relationship can be established with other fixed related members by inserting the case plate. In particular, the distance between the photoreceptor drum 5 and the developing sleeve 4 is extremely close, and the size of the distance greatly affects development. Therefore, although the slit S2 is provided in the case 40 according to the present invention, it is also possible to adopt a structure in which the developing unit is retracted when the case 40 is removed. According to the present invention, the above precision is required each time the case 40 is inserted into or removed from the copying machine 21! i1 dimension m
There is no longer any need for adjustment.

〔Effect of the invention〕

The present invention not only makes it easy to deal with recording paper feeding errors, but also makes it possible to extremely easily remove and install the copying function part, which is often replaced or inspected, making it possible to make two-part copying machines convenient for maintenance. It was decided that a machine would be provided.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing the configuration of a two-part copying machine. FIG. 2 is a side sectional view of a two-part copying machine to which a unit case 4o according to the present invention is attached. FIG. 3 is an external perspective view of the unit case 40. 21... Copying machine 21a... Upper main body 21b...
Lower main body 6... Photoreceptor drum part... Charging electrode part.
...Focusing photoconductor section...Developer 29m...Sleeve (9)...Transfer pole 31...Separation pole side...Static neutralization i 38°・°Cleaner box 40...Case
H...Hinge 81.82.83...Slit agent Umi Kuwabara

Claims (1)

[Claims] A two-part copying machine that can be opened upward and that, when divided into two parts, allows a unit including at least a drum, a cleaning unit, a cleaner and a box to be detached from the main body of the copying machine,
A two-part copying machine characterized in that the unit is provided with an opening facing a developing device installed in the main body separately from the unit.