JP3347885B2 - Charger cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaner for cleaning a charger, and more particularly to a scorotron-type cleaner for a charger used in an image forming apparatus such as a copying machine.

[0002]

2. Description of the Related Art For example, in a scorotron type charger of an image forming apparatus such as a copying machine, a grid wire is provided between a photoreceptor and a corona discharge wire, and a high voltage is applied by the corona discharge wire so that a constant voltage is applied. A potential is applied to the photoconductor. In such a copying machine, if copying is continued, the above-mentioned two wires of the charging device become dirty due to toner scattering, paper dust and the like. Due to the contamination, the surface potential of the photoconductor fluctuates, and the image density changes accordingly. For this reason, a charger cleaning device has been developed (Japanese Utility Model Laid-Open No. 63-24).
No. 561). FIG. 5 is a schematic diagram showing a schematic configuration of an example of such a conventional charger cleaning device A '. As shown in FIG. 5, a conventional cleaning device A 'for the charger 1'.
Is provided with a wire cleaning member 3 'for cleaning the discharge wire 2' and a grid cleaning member 5 'for cleaning the grid wire 4', and has a structure in which both members 3 'and 5' are united. . The discharge wires 2 'and the grid wires 4' are simultaneously cleaned by reciprocating the two members 3 'and 5' in the direction in which the discharge wires 2 'and the grid wires 4' are stretched simultaneously by a driving device (not shown). It has become.

[0003]

In the conventional charger cleaning device A 'described above, the discharge load 2' and the grid wire 4 'are simultaneously cleaned, so that the driving load becomes very large. . For this reason, there is a possibility that the cost of the device is increased or the power consumption is increased. SUMMARY OF THE INVENTION An object of the present invention is to improve a charger cleaning device in order to solve such problems in the conventional technology, and to provide a charger cleaning device which requires a simple mechanism and consumes less power. Is what you do.

[0004]

To achieve the above object, the present invention provides a first cleaning member capable of contacting a discharge wire of a charger, and a second cleaning member capable of contacting a grid wire. , The first and second cleaning members are provided along the two wires.
A cleaning device for a charger, which cleans both wires by reciprocating the support member, wherein the first cleaning member comprises the support member.
The second cleaning member is rotatably supported by the first cleaning member.
The cleaning member is pivotally attached to the cleaning member, and the support member
A cleaning device for a charger, wherein each cleaning member is configured to alternately contact each wire in the forward path and the return path in the reciprocating movement of the charger . In addition, the first,
The second cleaning member is a cleaning device for the charger that is separated from each wire in a standby state.

[0005]

According to the present invention, the support member provided with the first cleaning member capable of contacting the discharge wire of the charging device and the second cleaning member capable of contacting the grid wire is reciprocated, so that both the members can be moved. When cleaning the wire, reciprocate the support member
Each cleaning member is brought into contact with each wire alternately on the outward path and the return path in the movement . Therefore, the driving load can be reduced. Further, when the first and second cleaning members are separated from each other in the standby state, no load is applied to both wires by the cleaning member. as a result,
It is possible to obtain a charger cleaning device which has a simple mechanism and requires less power consumption.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. The following embodiment is an example embodying the present invention and is not intended to limit the technical scope of the present invention. Here, FIG. 1 is a schematic diagram showing a schematic configuration and operation of a charger cleaning device A according to an embodiment of the present invention, and FIG.
FIG. 3 is a perspective view showing a state in which is on the outward path, and FIG.
FIG. 4 is a detailed explanatory view of the operation of the device A. As shown in FIGS. 1A to 1C, the cleaning device A for a charger according to the present embodiment includes a first cleaning member 3 that can contact only the discharge wire 2 of the charger 1 and a grid wire 4. A second cleaning member 5 that can be brought into contact with only the first and second cleaning members 3 and 5 by reciprocating the first and second cleaning members 3 and 5 to clean both wires. The cleaning members are alternately brought into contact with the wires 2 and 4 on the outward and return paths of the members 3 and 5, respectively. This will be described in more detail below. As shown in FIGS. 2 and 3, the cleaning device A includes a support member 8 that slides while being guided by a horizontally long groove 7 formed on the ceiling surface of the shield case 6. A pin 9 is rotatably supported on a bracket 8 a provided on the support member 8. The first cleaning member 3 is fixed to the pin 9, and the second cleaning member 5 is pivotally attached to the first cleaning member 3 so as to be swingable. The locking portion 10 formed at the upper end of the first cleaning member 3 is inserted into an insertion hole 11 vertically penetrating the center of the support member 8, and the first cleaning is performed within the width of the insertion hole 11. The swing of the member 3 is regulated. On the other hand, a reciprocating moving means driven by a motor is provided above the shield case 6. The reciprocating means is a rope 12, a pulley 12a and a motor 12 in the illustrated example.
b corresponds to this. The locking portion 10 of the first cleaning member 3 is locked to the rope 12, and as the rope 12 reciprocates, the first cleaning member 3, the supporting member 8 integrally connected thereto, and the second Cleaning member 5 is guided by the groove 7 and travels.

When the first cleaning member 3 rotates clockwise in FIG. 1, the first cleaning member 3 integrally includes an interference piece 13 which comes into contact with the projection 5a of the second cleaning member 5. When the second cleaning member 5 rotates clockwise in FIG. 1, the second cleaning member 5 contacts the lower surface of the ceiling of the shield case 6 and rotates the second cleaning member 5. The regulating piece 14 for regulating the pressure is provided integrally. When the cleaning device A comes to the right end in FIG. 1, the restriction piece 14 enters the hole 15 formed in the ceiling surface of the shield case 6, and the rotation restriction of the second cleaning member 5 is released. . At this time, a contact piece 16 of the second cleaning member 5 shown in FIG. 1C is provided at the right end of the shield case 6 so as to forcibly separate the second cleaning member 5 from the grid wire 4. Is desirable. In the drawing, reference numeral 17 denotes a brush provided on the first cleaning member 3, and reference numeral 18 denotes a brush provided on the second cleaning member 5, which respectively contact the discharge wire 2 and the grid wire 4 alternately.
Clean each wire. Hereinafter, the operation of the cleaning device A will be described with reference to FIGS. As shown in FIG. 1 (a), when the rope 12 travels leftward (forward), the first cleaning member 3 locked to the rope 12 at the locking portion 10 rotates counterclockwise and is provided at the lower end. The brush 17 comes into contact with the discharge wire 2 and removes dirt. At this time, since the force for restricting the rotation of the second cleaning member 5 is not applied, the second cleaning member 5 shown in FIG.
As shown in (a), the protrusion 5a of the second cleaning member 5 moves until it comes into contact with the interference piece 13, and the brush 18 is in a state of avoiding contact with the grid wire 4. That is, only the brush 17 comes into contact with the discharge wire 2 on the outward path,
Only the discharge wire 2 is cleaned. Next, when the rope 12 reverses from the forward path to the backward path and starts traveling rightward in FIG. 1, the first cleaning member 3 is pulled by the rope 12 and rotated clockwise as shown in FIG. I do. As a result, the brush 17 of the first cleaning member 3 moves away from the discharge wire 2. First
When the cleaning member 3 is rotated clockwise as described above, the interference piece 13 is rotated while being in contact with the second cleaning member 5 as shown in FIG. 5 is rotated clockwise. Then, the second cleaning member 5 is moved to the state shown in FIG.
As shown in (2), when the regulation piece 14 is rotated to the vertically standing state, the regulating piece 14 contacts the lower surface of the ceiling of the shield case 6. As a result, the first and second cleaning members 3 and 5 both stand vertically as shown in FIG.
Only the wire comes into contact with the grid wire 4.

In this state, the cleaning device A is operated as shown in FIGS.
As shown in (c), when the right end of the shield case 6 is reached, the restricting piece 14 fits into the hole 15, and the restricting force for keeping the brush 18 of the second cleaning member 5 in contact with the grid wire 4 is released, so-called, “so-called”. It goes into a standby state. As shown in FIG. 4C, in the contact state between the interference piece 13 and the protrusion 5a of the second cleaning member 5, a play is provided at an angle α, and the second cleaning member 5 This is because it moves to the left inside by this play. Therefore, no load is applied to both wires 2 and 4 in this standby state. At this time, if the second cleaning member 5 is brought into contact with the contact piece 16, both the brushes 17, 18 are completely separated from both the wires 2, 4, so that a discharge function such as an image forming operation in this state is hindered. There is no risk of occurrence. Thereafter, when the rope 12 starts to move leftward again, the interference piece 13 rotates again while being in contact with the protrusion 5a of the second cleaning member 5, and the second cleaning member 5 is rotated.
Rotates counterclockwise (see FIG. 4A). As described above, according to the present embodiment, the driving load can be reduced as compared with the case where the discharge wire 2 and the grid wire 4 are simultaneously cleaned. In addition, as a mechanism for retracting the cleaning member from both wires, the driving force of the reciprocating means is used, and no other release mechanism is used. Furthermore, the first and second
The cleaning members 3 and 5 are coaxially rotated and released, so that the mechanism itself is also simple. Since such a relatively simple mechanism can be used, the number of failures is small and the cost can be reduced. Further, when the first and second cleaning members are separated from each other in the standby state, no load is applied to both wires by the cleaning member. As a result, it is possible to obtain a charger cleaning device which has a simple mechanism and consumes less power. In the above embodiment, the second cleaning member 5 is retracted from the grid wire 4 when the discharge wire 2 is being cleaned on the outward path, and the second cleaning member 5 is on the contrary when cleaning the grid wire 4 on the return path. Although the cleaning member 3 is retracted from the discharge wire 2, there is no bearing in actual use even if the objects to be cleaned are reversed between the forward path and the return path.

[0009]

The cleaning device for a charger according to the present invention is configured as described above, so that the driving load can be reduced as compared with the case where the discharge wire and the grid wire are cleaned at the same time. In addition, as a mechanism for retracting the cleaning member from both wires, the driving force of the reciprocating means is used, and no other release mechanism is used. Furthermore, since the two cleaning members are coaxially rotated and released, the mechanism itself is simple. Since such a relatively simple mechanism can be used, the number of failures is small and the cost can be reduced. Further, when the first and second cleaning members are separated from each other in the standby state, no load is applied to both wires by the cleaning member. As a result, it is possible to obtain a charger cleaning device which has a simple mechanism and consumes less power.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a schematic configuration and operation of a charger cleaning device A according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state when the device A is on an outward path.

FIG. 3 is an exploded perspective view of the device A.

FIG. 4 is a detailed explanatory diagram of the operation of the device A.

FIG. 5 is a schematic diagram showing a schematic configuration of an example of a conventional charger cleaning device A ′.

[Explanation of symbols]

 A: Cleaning device 1: Charger 2: Discharge wire 3: First cleaning member 4: Grid wire 5: Second cleaning member

Continuation of the front page (72) Inventor Toshinobu Katabuchi 1-2-2, Tamazo, Chuo-ku, Osaka-shi, Osaka Inside Mita Kogyo Co., Ltd. (56) References JP-A-4-36963 (JP, A) JP-A-4- 463 (JP, A) JP-A-2-6972 (JP, A) JP-A-3-89267 (JP, A) JP-A-5-11574 (JP, A) (58) Fields investigated (Int. ⁷ , DB name) G03G 15/02 H01T 19/00

Claims (2)

(57) [Claims] 1. A first cleaning member capable of contacting a discharge wire of a charger, a second cleaning member capable of contacting a grid wire, and both wires provided with the first and second cleaning members. Along
And a single support member movable with
In the cleaning apparatus of the charger for cleaning the both wire by reciprocating a pivotally supported is on the first cleaning member is the support member
And the second cleaning member is moved relative to the first cleaning member.
A cleaning device for a charger, wherein the cleaning member is rotatably mounted on a shaft, and is configured so that each cleaning member alternately comes into contact with each wire during the reciprocating movement of the support member . 2. The cleaning device for a charger according to claim 1, wherein said first and second cleaning members are separated from each other in a standby state.