JPS59100482A - Cleaning device - Google Patents

Abstract

PURPOSE:To prevent play during equalizing rotation and to perform excellent cleaning by providing a member which contacts a holder at distance from a support shaft and restricts a movement deviating from a rotating surface. CONSTITUTION:The equalizing support shaft 4 of the holder is provided with a spring 8. Bearing rollers 10 are provided at positions between the support shaft 4 of a pressure rotating shaft 5 and both end parts. Therefore, the holder 3 energized upward elastically by the spring 8 is pressed against a couple of bearing rollers 10. Consequently, play resulting from the degree of freedom of the rotation of the blade is prevented. The turning of the holder 3 around the equalizing shaft 4 is performed smoothly by the rotation of rollers 10. Consequently, even when the rotary pressure of the pressure rotating shaft 5 is low, the blade performs excellent cleaning without leaving a photosensitive drum surface.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning device, and more particularly to an Eve-2-Is cleaning device in which a holder rotatable about a support shaft holds a blade that contacts and cleans an image carrier. .

This will be explained below with reference to the drawings.

・Fig. 1 is a side view of a conventional cleaning device for Iblyse spindle, Fig. 2 is a top view, and Fig. 6 is a
Each figure shows a front view from the side.

Reference numeral 1 denotes an image carrier, specifically a photosensitive drum in which a photosensitive member is provided on a drum-shaped support.・2 is the cleaning blade, which is made of an elastic material such as polyurethane rubber and has appropriate hardness and thickness. Reference numeral 6 denotes a blade holder, into which the second end of the blade is fitted into four parts provided at one end. An Iblyse support shaft 4 is implanted on the upper surface of the central portion of the holder. Reference numeral 5 denotes a pressurizing rotation shaft, which is passed between both side plates 16 of the equipment case and ink and rotates for pressurizing. The support shaft 4 is rotatably engaged with the pressurizing rotation shaft 5.・6 is an E-ring that locks the Iblyse support shaft 4. Reference numeral 7 denotes a weight provided on the side opposite to the blenide holding end of the polder 6. The operation of such a conventional device was as follows.

The weight 7 causes a rotational force in the direction of the arrow a about the pressurizing rotating shaft 5, and the tip of the blend 2 comes into contact with the drum rotating in the direction of the arrow d, thereby cleaning the drum surface. Also, the equalization support shaft 4. of.

The blade and holder 3 are at the center as shown by the arrow 111o1. b
□,b,.

Because it has the ml rotation self-delivery shown in b8 (1□When the tip of the pucedo comes into contact with the dom?, the contact pressure is pre.

- uniformity in the longitudinal direction. However, due to the Gantz' nose between the equalization spindle and its mounting hole, arrow C01 in Figure 6
The blade holder moves as shown in C1r Cs, em. For this reason, the Iblyth rotation plane swings in a direction perpendicular to it. In the conventional glue IJ + = song setting with this configuration, when the contact pressure of the special blade and blade is weakened, the tip of the shear blade will be slightly (≦
Failure to do so may result in poor cleaning. Therefore, in order to deal with this, conventionally, the contact pressure between the blade and the blade has been increased to suppress the occurrence of cleaning failures caused by this type of vibration. However, under the strong contact pressure of the outer relay P, the toner to be cleaned is rubbed onto the drum surface by the pressure, resulting in problems such as fusion and filming.

Furthermore, if the surface is easily damaged by high-pressure rubbing, it is difficult to even apply this type of equalizing spindle.

The present invention has been made in view of the above points, and has the following features:
, 1 le - - This invention relates to an Eve 2 Is type cleaning device that is free from the possibility of causing Gooning defects.

The present invention provides an equalizing support shaft cleaning device in which a holder movable in one direction with respect to the support shaft holds a blade for contacting and cleaning an image carrier, in which the cleaning device contacts the holder at a position separated from the support shaft force. , holder〇The feature is that a member is provided to restrict movement away from the rotation surface.

Hereinafter, details of the present invention will be explained by way of specific examples and with reference to the drawings. .

FIG. 4 is a partial front view of an exemplary device according to the present invention. A common member with the devices shown in the first to third figures above includes a spring 8 4jξ which applies an elastic force in the direction of the support shaft. On the other hand, bearing rollers 10 are provided at separate positions from the position of the support shaft 4 of the pressurizing rotation shaft 5 toward both ends thereof.

Therefore, the holder 6, which is elastically biased upward by the spring 8, is pressed against the pair of bearing rollers 1.0. As a result, the backlash Φ indicated by C0 to og in the conventional device as shown in FIG. 6 is eliminated.

Of course, equalization can be smoothly performed by moving the holder 60 times around the support shaft 4 and rotating the bearing rollers 10.

With this configuration, even when the rotational pressure of the pressurizing rotating shaft 5 is set to a low pressure, the blade does not separate from the photosensitive drum surface, and good leaning is possible.

FIG. 7 compares the correlation between the blade contact pressure, cleaning failure, yield rate, and the correlation between the blade contact pressure and the rate of occurrence of fusion between the conventional device and the above-mentioned specific example device of the present invention. . In the figure, it was not possible to find a condition that completely prevents both the broken lines from occurring.

On the other hand, the solid line indicates the case of the above-mentioned specific example device based on the present invention, and it is possible to set conditions that prevent both the occurrence of fusion and the occurrence of poor cleaning.

FIG. 5 is a partial front view of a different embodiment of the apparatus according to the present invention, and FIG. 6 is a top view of the same apparatus. Components common to those of the apparatus shown in FIG. 4 above are indicated by the same figure numbers.

, 12 is a slider made of Teflon resin, and 11 is a base made of sponge that supports the slider. The two sponge bases 11 are glued to the blade hole #-'l''+,
The rough slider 12 is bonded to this two-bonge base 11. Slider 12' due to the repulsive force of the sponge
is pressed against the pressurizing rotating shaft 5'. Further, due to the sliding movement between the slider 12 and the pressurizing rotation shaft 5, the rotation of the two-axis support shaft 40 is performed smoothly. With such a configuration, it is possible to prevent the vibration of the equalizing rotating surface as in the previous example. And it also allows for good cleaning.

Moreover, the device of the present invention can provide good leaning performance even with a low blade contact pressure.

Furthermore, the device of the present invention is excellent in that there is no fear of occurrence of fusion, filming, etc. □

[Brief explanation of the drawing]

1 is a side view of a conventional cleaning device, FIG. 2 is a top view of the same, FIG. 6 is a front view of the same, and FIG. 4 is a partial front view of a specific example cleaning device based on the present invention. FIG. 5 is a partial front view of a different embodiment of the device according to the present invention, FIG. 6 is a top view of the same device, and FIG. 7 is a correlation diagram of the cleaning defect occurrence rate and the fusion occurrence rate with respect to the blade contact pressure. In the figure, 11 image carrier, 2f cleaning blade, '5
holder, 4I support shaft, 10, 121 regulation member.

Claims (1)

[Claims] (1) In an Eve 2 Eyes type cleaning device in which a holder rotatable about the spindle contacts the image carrier to clean the lower part of the brake, the holder comes into contact with the holder at a position away from the spindle, and the holder A cleaning device characterized by being provided with a member that restricts movement away from the rotating surface. (2. In the invention set forth in claim 1, the cleaning device is characterized in that the regulating member is a roller. (6) In the invention set forth in claim 1, the regulating member is characterized in that the regulating member is a roller. A cleaning device characterized in that is a slider.