JPS58182680A - Cleaning device - Google Patents

Abstract

PURPOSE:To prolong by two times the life of a cleaning blade and to improve its performance by allowing the cleaning blade projecting out of the opening part of a casing to rotate reversely by 180 deg. while the casing is put away from a photoreceptor. CONSTITUTION:When the casing 3 is slanted around an engaging part 11, the driving joints of a cleaning roller 8 and a screw 9 fall out, the 1st arm 6 is lowered, and the cleaning blade 4 stops on the cleaning roll 8. In this state, a cleaning device 2 is drawn out of the machine completely and the 1st arm 6 is further turned counterclockwise. Then, the cleaning blade 4 and a blade holder 5 are separated from the 1st arm 6 at said position against a spring 28 as shown by an arrow to rotate reversely the cleaning blade 4 by 180 deg.. Consequently, a worn edge part 4b is replaced by a new edge part 4c and the life of the cleaning blade is prolonged by two times.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plate-type cleaning device for an electrostatic latent image carrier, which is applied to electrophotographic copying machines, electrostatic d-recording devices, and the like.

This electrostatic charge is removed by the cleaning device of the image carrier.
Kameko photocopy F! This will be explained using i as an example. The main components of the Amushi Shasho Erase Wall are: a drum-shaped or endless belt-shaped mortar which rotates in one direction; a photoreceptor serving as an image carrier; a charger placed around the photoreceptor; Exposure device,
The developing device, transfer device, cleaning device, etc.
On the surface of the photoreceptor, which is uniformly charged by Tosen, the cool air is applied.
At the same time, a light image is delivered by an exposure device to form an electrostatic image.

This image of Kamehiro is made into a visible image by layering powdered Genka 011 with a developing device, and this visible image is transferred onto a transfer paper that is fed in synchronization with the rotation of the photoreceptor. The image is transferred in a transfer device ζ. However, even if the developer is transferred from the photoreceptor to the transfer paper, it is normal for some residual developer to remain on the surface of the photoreceptor, and the remaining developer will disappear before the next copying process begins. 3. It must be removed and collected from the surface of the photoreceptor through a cleaning device.3. A number of methods have been proposed for removing and collecting "residual development explosion", including the well-known methods such as the Q()'' method and the blade method.
.

The plan type cleaning device is configured such that a rotary cylinder made of synthetic fibers or natural fibers is brought into sliding contact with the photoreceptor. This method is not commonly used or without interfusion,
For example, the disadvantages include that 1.0 errors are likely to occur during copying, that it is quite noisy, and that it requires a considerable amount of space.

On the other hand, the theory of cleaning using a blade system is that it uses a cleaning blade made of elastic polyurethane rubber, a drive mechanism that presses the cleaning blade against the surface of the photoreceptor, and a cleaning blade. iI
means for containing and recovering the current 1'V Mll that is dropped. This method has 40 points: since the cleaning blade only touches the surface of the photoconductor, toner scum is less likely to be generated, the operation is quiet, and the space is small. However, it is difficult to press the surface of the photoconductor uniformly over the sliding contact part, that is, the edge part of the cleaning blade, over the entire VC, and the edge part may be locally abnormally worn.'+i: 'J: L It has the disadvantage of uneven cleaning. Also, if the edge part becomes worn, immediately use a cleaning blade! : The work is troublesome and the work is laborious and easy to use.

In order to overcome the above-mentioned drawbacks, the cleaning blade holder/C is designed to rotatably hold approximately the longitudinal center of the holding member of the cleaning blade, so that the pressing force of the cutting and ji parts extends over the longitudinal direction. A method to make it uniform has been proposed (
JP-A-54-9734).

According to this method, the replacement time of the cleaning blade can be extended without localized abnormal wear of the edge portion, but there is a disadvantage that it is still not as long as the replacement time of other cleaning parts.

Next, a method has been disclosed in which multiple cleaning blades are supported at rotation kf+, and each cleaning blade can be selectively pressed against the photoreceptor by the rotation of this rotating body (Utility Model No. 55 -12241) With this method, even if the edge of one cleaning blade wears out, there is no need to remove the Cleaner/Tard, and several cleaning blades can be used one after another. Because it can be cleaned, it is possible to significantly extend the time it takes to remove the rotating body of the leaning blade.However, the cleaning equipment (and the cleaning equipment) has become larger, and the entire device has also become larger, resulting in increased costs. There are some drawbacks.

An object of the present invention is to overcome the above-mentioned drawbacks and to provide a cleaning device that has a simple structure, performs good cleaning and takes a long time to replace.

This purpose is to provide a cleaning blade for wiping off toner remaining after transfer on the surface of a rotating electrostatic latent image carrier, a blade holder for supporting this cleaning blade along the longitudinal direction, and a casing for wgr'. an arm member which is attached to the cleaning plate while rotatably supporting the blade holder at the center in the longitudinal direction 16 and is given the habit of pressing against the surface of the carrier; , has a part of the electrostatic latent image carrier [opening close to fll], and has an arm part A4 and an A'li mb blade halter and the cleaning plate 1. A cleaning device μ having a casing housed in a J fill is used to erase the casing from the D′ image carrier.
At the position where it was used, cut the cleaning plate 1C.
An arm 818+/ with an oscillating eye that protrudes from the caning opening and has an oscillating eye for positioning the awn in the center;
According to the present invention, since the blade holder supporting the cleaning blade along the longitudinal direction is pivoted at the center of the arm part in the longitudinal direction, the edge part of the cleaning blade is uniform in the longitudinal direction. 19 Pressed against the surface of the image carrier by pressure force
At a position where the caisson γ is separated from the electrostatic latent image carrier, the cleaning blade is projected from the opening of the casing, and the cleaning blade 18 is easily removed.
By reversing the cleaning blade by 0 degrees, the used edge portion can be switched directly to the unused edge portion, thereby doubling the life of the cleaning blade and reducing maintenance costs.

The illustrated embodiment will be described in detail below.

1 to 4 show the cleaning device of the present invention. In FIGS. 1 and 2, reference numeral 1 indicates an electrostatic latent image carrier taro photoreceptor. The photoreceptor 1 is rotated in the direction of the arrow, and a cleaning device 2 is provided close to the photoreceptor 1. The cleaning device 2 includes a cleaning blade 4 inside a casing 3. Blade holder5.
A first arm 6 and a second arm 7 as arm members, a cleaning brush 8. It is constructed by accommodating the screw 9 and the like. The casing 3 has a substantially U-shaped cross section, the opening faces the photoreceptor 1, the upper end 3a has an arc-shaped cross section with a downward opening, and the upper end 3a has an arc-shaped cross section with an upper opening of the main body substrate. An engaging portion 11 is formed in cooperation with the end portion 10 . The casing 6 is swingable around the engaging portion 11,
4, which is adapted to come into contact with and separate from the surface of the photoreceptor 1;
The side plate 12 (only one side is shown) is attached to both sides 41 of the casing 3.
+1 extending to the pin bolt ring that secures the second arm 7, and a rotation 1141 that secures the cleaning brush 8.
114 and removal] - The rotary shafts 15 to which the chie recovery screws 9 are fixed are supported so as to be rotatable and freely, respectively. 1 The second arm 7 is approximately ``F'' ~
A screw fL16 is formed in the hole 16, and the pin holder 13 passes through the upper plate 12 and is screwed into the screw hole 16. 2nd arm 7
In addition to the one end 71 and the casing slot, the second end 71 is connected to the bottle 17 (/C1 spring 18 is fully loaded, and the second
The base end cap 6a of the first arm 60 is pivoted via the bottle bolt 19 to the other end of the second arm 7, which urges the arm 7 to rotate counterclockwise in the figure with the bottle bolt 13 as the center. supported. That is, the base end 6nt/(1) has a screw hole 20 formed therein and is adapted to be screwed into the screw of the pin bolt 19, and the second arm 7 and the first arm 6 each have a screw hole 20 formed therein and a screw of the pin bolt 19 attached thereto. Both ends of the wound spring 220 are fully locked, and the first arm 6 is always biased to rotate counterclockwise in the figure as the pin bolt 19 is held in place.

A stepped portion 6 is provided on the side surface of the first arm 6 in the direction of the urging force.
b is protruding. At the longitudinal center of the first arm B,
A stepped bottle 25 is fitted via a slidable l bearing 26. The blade holter '5 has a length of approximately 41 #m, and the stepped capital 6b of the first arm 2 is provided with a swivel, and the gap between the two arms allows the blade volta 5 to rotate. This is because the shape and mounting of the first arm 6 and second arm 7 are bad, or
Even if the attachment of the cleaning blade 4 and the blade holder 5 is poor, it is effective in ensuring that the cleaning blade 4 and the photoreceptor 1 fit together well. A stepped bin 25 is installed in the longitudinal center of the blade holder 5. A peripheral surface 2'5a into which a wafer 25b is fitted is bored at the free end of the tiered fI bin 25. Wanongya 25b
A coil spring 28 is elastically loaded between the blade holder 5 and the first arm 6, and the blade holder 5 is biased in a direction in which the blade holder 5 is always in pressure contact with the first arm 6. 1. The cleaning blade 4 and the blade holder 51 &: are pulled against the action of the coil spring 28. When the stepped part 1116b of the second arm 6 and the groove part 5a of the blade holder 5 are completely depressed, the coil spring link 28 is inserted so that the blade holder 5 can freely rotate around the stepped part 25. The entire length of the can eyebrow is set square. 1111 on the opposite side of the groove 5a of the blade holter 5
At 1111, the cleaning blade 4 is attached to the cleaning agent 128.
are connected via the The cleaning plate 4 is
The opposite side of plate boulder 5 is one side 4a of wa.
The edge portion b is pressed against the surface of the photoreceptor 1. A cleaning blade 8 is arranged below the cleaning blade 4. The cleaning brush 8 is rotated clockwise in the figure while its tips are in contact with the surface of the photoreceptor 1 and the bottom protrusion 6b of the casing 3, respectively.

The seal is a thin plate called Mylar, and its base is fixed to the lower part of the casing 3, and its free edge is attached to the photoreceptor 1.
It is designed to have a foil contact with the clothes. Kizong 6 I
II. From the protrusion 5b to the 4All plate 3C'
[A screw 9 is installed at the bottom of the river. Therefore, the residual toner T1 tL attached to the top surface of the photoreceptor 1 passes through the free edge of the seal plate 30. The removed toner T2 is partially removed by the cleaning bluff 8 and transferred to the tip, and when an impact is applied to the tip by the protrusion 3b, this removed toner T2 is scattered from the tip and falls to the bottom via the scree 9. The remaining toner that has passed through the cleaning brush 8 is scraped off by the edge portion 4b of the cleaning blade 4, and this removed toner T3 falls onto the cleaning brush 8 and passes through the bottom V through the above-mentioned course. (It is recovered by the rakudoshi screw 9.

Although the above action prevents local abrasion of the edge portion, when the time for replacing the cleaning grade approaches, the edge portion 4b becomes so worn that it cannot withstand further use. Simply remove the cleaning blade from 18 to 18 without replacing the cleaning blade.
The idea is that just by turning it 0 degrees, you can replace the worn edge part with a new one and use up 1 Fumi. That is, when removing the case ring 6, if the solid layer member with the main body is removed, the driving step of the cleaning roller 8 and the screw 9 or the outer workpiece and the case ring 6 will be removed as the engaging part 11ff: upper part. Since the cleaning device moves in such a state that it becomes extremely small, there is nothing in contact with the photoreceptor 1 and the cleaning device can be pulled out.

The first arm 6 stops at a position where it looks at the cleaning blade 4 or the cleaning roller 8 at most.

From this state, the cleaning link unit +y was completely pulled out from the circle, and the first arm 6 was rotated in the same direction as the VC in the figure. 6, the cleaning brush 8 interferes and takes some effort, but the work is done using an OJ rudder. However, the cleaning bra 78F is a front pillar Bib product, and 9: It is customary to be able to easily remove it when using the sword.
cleaning blade 4 and blade holder 5
%F:11 direction against the coil spring 28, and then turn it 480 degrees, the worn edge stand HX
The new Edge i4c will replace the 4b as the 1st history HJ power.

#4Jl like above! , so the edge can be easily operated without any problem in reversing the cleaning plate. Conventionally, the cleaning grade was 11.
r:! It used to be that you could extend your lifespan just by using J-I history, but you can double your lifespan by using Etsujibe's father's joy without having to change your father.

Honjoshi? In Ij, the cleaning blade (1) includes the 1st and 27th VCs for pressing the cleaning blade τ, but the present invention is not built on this method. It would be better if at least one arm was provided to protrude from the Ku/Fugu opening so that the reversing operation when changing the cleaning blade is 0rtt. In addition, the above-mentioned method was made for cleaning the toner deposited on the photoconductor, but the holding body may be a contacting body that is placed on the photoconductor, and furthermore, the shape It can be used not only as a drum but also as an endless belt. In addition to the history of dry toner cleaning methods, the theory behind wet toner cleaning methods has also changed.
1 [3° implementation that can be used for ill? 1J, and is a diagram showing a part of FIG. 1 during cleaning.

DESCRIPTION OF SYMBOLS 1: Photoreceptor, 2: Cleaning device, 3: Case, 4: Cleaning blade, 5: Blade holder, 6: First arm, 7-: Second arm, 25: Stepped bin.

Claims (1)

[Claims] A cleaning blade that wipes off toner remaining after transfer on the surface of a rotating electrostatic latent image carrier, a blade holder that supports the cleaning blade by being piled up in the longitudinal direction, and a case V that is attached to the surface of the rotating electrostatic latent image carrier. The cleaning nog blade (11) is attached to the surface J of the electrostatic latent image carrier (ψH- The arm member is provided with the habit of being oriented in a direction in which the blade is oriented, and the opening portion is adjacent to the surface of the cleaning paper carrier. A cleaning device having a cleaning blade of 11 Hi and a Kuhn housed therein, wherein the cleaning blade has a cleaning blade of 5 lf in a position where the Kuhn is spaced apart from the electrostatic latent image carrier.
A cleaning device having an arm member that is swingable so as to be positioned at a position protruding from the He cage/da opening convex portion.