JPS638782A - Cleaning device - Google Patents

Abstract

PURPOSE:To effectively prevent vibration of a cleaning blade to satisfactorily and surely remove a remaining toner on a photosensitive drum by providing a rotating damper in relation to a solenoid arm. CONSTITUTION:In a cleaning device, a gear 10b is formed on a revolving shaft 10a of a solenoid arm 10, and a gear 13a of a gear shaft 13 of a rotating damper 12 as a buffer means is engaged with the gear 10b. With respect to the rotating damper 12, a resistance blade 14 formed on the gear shaft 13 is stored in a damper body 12a, and viscous oil 15 is stored in the damper body 12a, and the rotation of the solenoid arm 10 is damped by the viscous oil 15 and the resistance of the resistance blade 14. Consequently, a plunger 9 of a solenoid 8 is moved back and forth more slowly, and as the result, contacting and separating operations of a cleaning blade 4 of a supporting member 3 to and from a photosensitive drum 1 are performed slowly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a cleaning device for removing residual toner from a photosensitive drum.

(Prior Art) Generally, a photoconductor drum cleaning device is disposed inside a copying device to remove residual toner adhering to the photoconductor drum of the copying device.

FIG. 7 shows such a conventional photoreceptor drum cleaning device. In the figure, 1 indicates the photoreceptor drum a3, and 2 indicates the cleaning mechanism.

A support member 3 supported by rotation N15a is disposed inside the cleaner case 2a of the cleaning mechanism 2. It is rotatably arranged so as to be able to approach and separate, and is provided with a weight 5. Further, a protruding arm 6 is formed on the supporting member 3, and the protruding arm 6 is rotated 'T' so as to transmit an operation to the supporting member 3 so as to move the cleaning plate 4 toward and away from the photosensitive drum 1. [b 7 It abuts and is engaged with the transmission arm 7, which is a transmission means supported by a. Further, a solenoid arm 10 connected to a plunger 9 of a solenoid 8 and supported by a rotating shaft 10a is brought into contact with one end of the transmission arm 7. A tension spring 11 is connected to the other end of the transmission arm 7, and the tension spring 11 biases the transmission arm 7 in a predetermined direction.

Therefore, in this cleaning device, the solenoid 8
is activated and turns on, the plunger 9 will move as shown by arrow A.
The solenoid arm 10 rotates in the direction of arrow B about the rotation axis 10a, thereby pushing down the end of the transmission arm 7. As a result, the transmission arm 7 rotates in the direction of arrow C around the rotating shaft 7a. Due to this rotation, the engagement of the protruding arm 6 of the support member 3 is released, and the support member 3 is rotated in the direction of the arrow by the weight 5, so that the cleaning blade 4 comes into contact with the photoreceptor drum 1.

Then, residual toner on the photosensitive drum 1 is removed by the cleaning blade 4.

Furthermore, when the temperature of the photoreceptor drum 1 reaches a predetermined high temperature,
A temperature sensor (not shown) detects this and solenoid 8 turns O.
It is set to FF state. As a result, the solenoid arm 10 becomes rotatable, the transmission arm 7 is pulled in the direction of the arrow E by the tension spring 11, the protrusion arm 6 is pushed up, the support member 3 is rotated, and the cleaning blade 4
is separated from the photoreceptor drum 1.

(Problems to be solved by the invention) However, in the above-mentioned conventional cleaning device,
Since the ON/OFF operation of the solenoid is rapid, the support member 3 vibrates, and due to this single movement, residual toner wraps around the back side of the cleaning blade 4, and this residual toner adheres to the photoreceptor drum 1 again and is cleaned. There was a problem that defects occurred. Further, even when the copying apparatus is vibrated during copying operation, the supporting member 3 vibrates and the cleaning blade 4 does not make proper contact, resulting in poor cleaning.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a cleaning device that has a simple configuration and can effectively and reliably remove residual toner from a photoreceptor drum.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention supports a cleaning blade for removing residual toner on the photoreceptor drum so that it can approach and separate from the photoreceptor drum. a supporting member, a transmission means for transmitting an operation so that the cleaning blade approaches and separates from the photoreceptor drum; and a slowing means provided in connection with at least one of the supporting member, the transmission means, and the operating means, and slowing the movement of the cleaning blade toward and away from the cleaning blade. It is prepared.

(Function) By the above-mentioned means, the present invention can easily and reliably remove the residual toner on the photosensitive drum.

(Example) Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 shows a cleaning device according to an embodiment of the present invention, and parts common to those in FIG. 7 are given the same reference numerals and redundant explanation will be omitted.

As shown in the figure, the cleaning device of this embodiment is
A gear 10b is formed on the rotating shaft 10a of the solenoid arm 10, and this gear 10bG is engaged with the gear 13a of the gear shaft 13 of the rotary damper 12, which is a slowing means. As shown in FIGS. 2 and 3, the rotary damper 12 includes a gear shaft 1 in a damper body 12a.
Viscous oil 15 is accommodated in the damper body 12a, and the resistance between the viscous oil 15 and the resistance vane 14 causes the solenoid arm 1 to
The rotation at 0 is slow. Therefore, the reciprocating motion of the plunger 9 of the solenoid 8 is slow, and as a result, the movement of the cleaning blade 4 of the support member 3 into contact with and away from the photosensitive drum 1 is slow.

In this embodiment, since the rotary damper 12 is provided in relation to the solenoid arm 10, the cleaning blade 4
The residual toner on the photoreceptor drum 1 can be effectively and reliably removed by effectively preventing the above problems, and as a result, cleaning defects can be effectively prevented.

FIG. 4 does not show another embodiment of the present invention, and parts common to those in FIG. 1 are given the same reference numerals and redundant explanations will be omitted.

In the same figure, in the cleaning device of this embodiment, a viscous fluid 16 such as silicone oil (10,000 csf) is filled between the plunger 9 of the solenoid 8 and the coil pobbin 8a. A sealing member 8b is provided at the opening. Therefore, the reciprocating motion of the plunger 9 of the solenoid 8 is resisted by the viscous fluid 16.
The ON-OFF operation of the solenoid 8 is slowed down, the rotational motion of the solenoid arm 10 is slowed down, and as a result, the movement of the cleaning blade 4 toward and away from the support member 3 is slowed down.

Therefore, the photosensitive drum 1 of the cleaning blade 4
Since the toner contacts the photoreceptor drum 1 slowly, residual toner on the photoreceptor drum 1 can be effectively and reliably removed, and cleaning failures can be effectively prevented.

FIG. 5 roughly shows another embodiment of the present invention,
Components common to those in FIG. 1 are designated by the same reference numerals and redundant explanations will be omitted.

In the figure, in this embodiment, a vibration isolating rubber 17 is disposed between the support member 3 and the cleaner case 2a to slow the rotational movement of the support member 3. This anti-vibration rubber 17
is fixed to the support member 3 and the cleaner case 2a with, for example, double-sided tape or adhesive. This fixing may be done by, for example, fixing to the support member 3 with double-sided tape or adhesive, or may be fixed to the cleaner case 2a side with double-sided tape or adhesive. As a result, when the support member 3 is rotated by the operation of a solenoid, which is an operating means (not shown), the rotation of the support member 3 is slowed down by the anti-pregnancy rubber 17, and the photoreceptor drum of the cleaning blade 4 is rotated. The movement toward and away from 1 becomes slow.

Therefore, the photosensitive drum 1 of the cleaning blade 4
As a result, the residual toner on the photoreceptor drum 1 can be effectively and reliably removed, and cleaning failures can be effectively prevented.

FIG. 6 shows another embodiment of the present invention, in which parts common to those in FIG. 1 are given the same reference numerals and redundant explanations will be omitted.

In the same figure, in the cleaning device of this embodiment, a linear damper 18 is disposed between the support member 3 and the cleaner case 2a. One damper body of the linear damper 18 is fixed to the support member 3, and the piston 20 is fixed to the cleaner case 2a. Further, a viscous oil 21 such as silicone oil is contained within the damper body 19, so that the piston 20 reciprocates slowly. Therefore, when the plunger of the solenoid, which is an operating means (not shown), reciprocates, the support member 3 is rotated or moved slowly by the linear damper 18, and the cleaning blade 4 approaches and separates from the photoreceptor drum 1. Movement becomes slow.

Therefore, residual toner on the photoreceptor drum 1 can be effectively and reliably removed, and as a result, cleaning failures can be effectively prevented.

Note that in each of the embodiments described above, the cleaning plate 4
Even if the main body of the copying machine is moved one step while the tamper is in contact with the photoreceptor drum 1, the rotating tamper 1, which is
2. Viscous [Since the support member 3 is in a semi-fixed state due to the main fluid 16, vibration isolating rubber 17 and linear damper 18,
The separation of the cleaning blade 4 from the photoreceptor drum 1 is prevented, and vibrations are also absorbed by each slowing means, and as a result, cleaning failures due to separation of the cleaning blade 4 from the photoreceptor drum 1 can be effectively prevented. can.

[Effects of the Invention] As explained above, the cleaning device of the present invention has a simple configuration and can remove residual toner on the photoreceptor drum well and reliably, and can effectively prevent cleaning failures. . Further, since the movement of the cleaning blade toward and away from the photoreceptor drum is slowed by the slow movement means, damage to the photoreceptor drum can be effectively prevented.

For example, even if the mutual device body is vibrated, the vibration is absorbed by the slowing means, effectively preventing the cleaning blade from separating from the photoreceptor drum during the cleaning operation, and as a result, cleaning failures are also effectively prevented. can do.

[Brief explanation of drawings]

FIG. 1 is a partially exploded side view showing a cleaning device according to an embodiment of the present invention, FIG. 2 is a plan view showing the rotary damper of FIG. 1, FIG. 3 is a side sectional view of FIG. 2, and FIG. is a partially exploded side view showing a cleaning device according to another embodiment of the present invention;
FIG. 5 is an enlarged side view of main parts showing a cleaning device according to another embodiment of the present invention, FIG. 6 is an enlarged side view showing main parts of a cleaning device according to another embodiment of the present invention, and FIG. The figure is a partially exploded side view showing a conventional cleaning device. 1...Photoreceptor drum 3...Support member 4...Cleaning blade 6...
...Protrusion arm 7 ...Transmission arm 8 ... Solenoid 9 ...Plunger 10 ... Solenoid Arm 12... Rotating damper 16... Viscous fluid 17... Anti-vibration rubber 18... Linear damper Applicant Toshiba Corporation Agent Patent attorney Suyama 1 Left - Figure 1 Figure 4 Figure 5 ￥6 Figure

Claims (1)

[Claims] (1) A support member that supports a cleaning blade for removing residual toner on the photoreceptor drum so that it can approach and separate from the photoreceptor drum, and a support member that supports the cleaning blade so that the cleaning blade can approach and separate from the photoreceptor drum. a transmission means for transmitting an operation to the support member; an operation means for operating the transmission means so that the cleaning blade of the support member comes into contact with or separates from the photoreceptor drum; A cleaning device comprising: a slowing means that is provided in relation to at least one of the cleaning blades and slows down the approaching and separating movements of the cleaning blade.