JPS59182486A - Cleaning device of image forming device - Google Patents

Abstract

PURPOSE:To execute easily the replacement of a blade and a maintenance work, and also not to damage a photosensitive body, etc. by fixing a cleaning blade, etc. in the course of a preliminary operation of drawing-out. CONSTITUTION:When drawing out a cleaning device 2 in order to replace a blade 3, or as necessary, first of all, a lever 12 is turned counterclockwise. A cam 11 is turned in one body, a weight 18 is pushed up, the blade 3 is separated from a photosensitive body 1, and also fixing members 10a, 10b are pressed against a stopper 15a and 15b, respectively. Accordingly, the turn around shafts 6, 7 becomes impossible. In this case, a drawing-out lock state by the lever 12 is released to enable the drawing-out. The mounting follows reversally the drawing-out, and in a state that the cam 11 and the weight 18, and the members 10a, 10b and the stoppers 15a, 15b are engaged to each other, respectively, the device 2 is pushed into a fixed position, and the lever 12 is retained to a lock.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to electronic copying machines, printing machines, the beam printers,
This invention relates to an improvement in a cleaning device surface for cleaning toner remaining on an image-bearing surface of an image forming apparatus such as a facsimile receiver.

For example, image formation in a Carlson process electronic vision machine is performed as follows. When the surface of a photoreceptor (image carrier) is primarily charged and then exposed to image light, a static image is formed on the photoreceptor (image bearing member), which is parallel to the original image. This electrostatic latent image is developed with toner, and the developed image is then transferred to transfer paper.

The second image on the transfer paper is fixed and ejected from the aircraft as a coffin copy. - Toner remaining on the surface of the photoreceptor 1 without being transferred is removed by a cleaning blade 3 of a cleaning device 2 shown in FIG.

The toner is collected by a roller 4 and conveyed by a screw 5 to a toner recovery device (not shown) located outside the crease device.

In order to effectively scrape off the photoreceptor 1 with the plate 3 and to prevent the photoreceptor 1 and the blade 3 from being worn out, the extent to which the blade 3 can be pushed onto the photoreceptor 1 is appropriately restricted. The bushes -1 and -3 are biased counterclockwise by the weight of the weight 18 with 4116 as the center, and are pressed into contact with the ignition body 1. In order to maintain uniform contact pressure by bringing the plate 3 into contact with the photoreceptor 1 at a position aligned with the rotational axis direction, a so-called equalizer system is adopted in which the blade 3 rotates around +l17. There is.

In the cleaning device 2 having the above configuration, the blade 3 is replaced when the edge of the plate 3 becomes worn. When replacing the plate, the blade 3 rotates around two fulcrums 6 and 7, so the plate holding plate 9 and the plate I/support plate 8 must also be removed, and the operation of replacing the blade with a new one will cause the blade to move and be difficult to perform. Hateful. When the cleaning device 2 is pulled out from the image forming apparatus main body to replace the plate, or when the cleaning device 2 is pulled out, the plate 3 and the holding plate 9 shake and collide with the photoreceptor 1, damaging the photoreceptor 1. Necessity of maintenance, etc. - 1 - The same danger exists when the cleaning device 2 is pulled out.

In order to avoid this, when replacing the blade, etc., fix the support plate 8 in advance, pull out the cleaning device 2 from the device body, complete the mysterious work, then store it, and then release the circle) r. A method has been adopted to do so.

In this case, the operation of pulling out or retracting the cleaning device from the image forming apparatus main body and the operation of fixing and releasing the blade are not related in any way, so the disadvantage is that the operation of fixing and releasing the blade is easy. be.

If the plate remains rigid, the equalizing function cannot be achieved, resulting in uneven cleaning.

An object of the present invention is to provide a cleaning device that eliminates the above-mentioned drawbacks of conventional cleaning devices.

To achieve this object, the present invention provides a cleaning device that rotatably supports a cleaning plate 3 and brings it into alignment contact with the surface of an image carrier 1, and that is removable from an image forming apparatus. 2 is housed in the image forming apparatus, the fixing member 10a of the cleaning blade 3
-10b is released and the cleaning blade 3 is maintained in a rotatable state, and when the cleaning device 2 is separated from the image forming apparatus, the cleaning blade 3 is
A cleaning device for an image forming apparatus δ, characterized in that the fixing members 10a and 10b are fixedly supported in conjunction with the operation of separating the image 1u from the surface of the image holder l, and the noning blade 3 is kept in a fixed state. δ.

The configuration of the present invention will be explained in detail in FIG. 1 from the implementation side.

The parts described above in the figure will not be explained again.

11 is a cam that rotates counterclockwise around +1113 to push 18. 12 (Chain plot) From C, leaning device 2's "11N was attached outside the city/\-
So, the cam 11 and rotation 114h l 3 are made common, and (
Yes.

As shown in FIG.
1 is engaged. /\-121 = rotates integrally with the cam 11. tOa and lob are fixed members extending from the blade support plate 8 at the back and front parts, respectively. 15a and 15b are my husband]? It is fixedly installed on the upper plate of the linning device 2 at a position opposite to the fixing member 10a and the fob. 17i± Cleaning device holding plate on the image forming apparatus main body side, and then move the cleaning device 2 to the normal position (
This is what is maintained.

When the cleaning device 2 is housed in the main body of the image forming bag Ft with the above configuration and in a state where buried cleaning is possible, as shown in FIG.
1, the device 2 cannot be pulled out as it is. At this time, as shown in FIG. 1, the pushing cam 11 is separated from the weight 18, and the fixing member 10a
10b is separated from the strike members 15a and 15b. Therefore, since the plate '3 is rotatable around the shafts 6 and 7, it is aligned and in contact with the photoreceptor 1 with uniform contact pressure.The cleaning device 2 can be replaced if the blade 3 is replaced or otherwise required. To pull it out, press Kusureno <-12 L and rotate it counterclockwise. Then, forces 1 and ll rotate together, pushing one weight 18 away from the blade 3 as shown in FIG.
is separated from the photoreceptor 1, and the fixing member 10a and lO
b or each stofpa 15a,! It is pressed against l:15b. Therefore, rotation about the axis 6-7 is made impossible. At this time.

The lock state of the drawer by 8-12 is released, and the drawer n (drawer n) becomes available.

After pulling out the cleaning device vJ2 from the main body of the device and completing necessary work such as replacing the blade, the cleaning device 2 is stored.

The cam 11 shown in Figure 2) is the opposite of the drawer case.
is engaged with the weight 18 and the fixing part kil Oa-10b or the I-sumpers 15a and 15b, respectively, and the device 2 is pushed in. After pushing it to the fixed position, turn the lever 12 to II.
When turned in the A1 direction and moved to the long 21, the push-up cam 11 separates from 5118 and the fixing member 10a111
The edges of Ob and stoppers 15a and 15b are cut. At the same time, the drawer of the cleaning device δ2 is locked. In this state, the plate 3 is freely rotatable about the support 6 and the shaft 7, so that the plate 3 comes into alignment contact with the photoreceptor 1.

Since the device of the present invention operates as described above, its interior is fixed when it is pulled out, making it easier to replace the blade 23 and perform other maintenance work. Moreover, since the fixing is done during the preliminary operation of the drawer, there is no chance of forgetting it. This eliminates the risk of damaging the photoreceptor even if a careless person replaces the blade.

It also eliminates the risk of forgetting to release the fixation inside the cleaning device after storage, resulting in uneven cleaning.

Although the above embodiment has been described using an image forming apparatus of an electronic copying machine as an example, other image forming apparatus K1 such as a printing machine, a laser beam printer, a facsimile receiver, etc. can also be used.
It is widely applied to cleaning devices that clean residual toner on the surface of an image carrier. In addition, the image forming method is limited to the Carlson process; a photoreceptor with a two-layer structure of a conductive layer, a photoconducting iE layer, and an insulating layer is subjected to pre-charging, exposure, de-charging, and post-exposure to form an electrostatic latent image. It is also applicable to other methods such as image forming methods.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of an embodiment of a cleaning device to which the present invention is applied, showing a state in which it is housed in an image forming apparatus main body, FIG.
The figure is an outside city u'j diagram in which cleaning equipment is housed. 1 is an image carrier, 2 is a cleaning device δ, 3 is a cleaning plate, and 10a and 10b are fixing members.

Claims (1)

[Claims] (1) Cleaning fly 1? In a cleaning device which is rotatably supported and brought into alignment contact with the surface of an image carrier and which is removable from an image forming apparatus, the cleaning blade is fixed A when the cleaning blade is housed in the cleaning device or the image forming apparatus. :' Keep the cleaning plate in a rotatable state with the retracted material in a released state, and release the cleaning blade from the cleaning device or image forming device. A cleaning device for an image forming apparatus, characterized in that a fixed member is fixedly supported and a cleaning blade is set in a 1^1 position.