JPH0521081Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] The purpose of the present invention is to ensure that the corona wire of a charger can be cleaned reliably and easily. This objective is achieved by using a cleaning tool that includes an elastic cleaning member that is movable in the longitudinal direction of the corona wire of the main body and in a direction orthogonal to the longitudinal direction.

[Industrial application field]

The present invention relates to a charger that can reliably and easily clean a corona wire.

In an electrophotographic recording apparatus using a photosensitive drum, a pre-charger, a latent image forming means such as an LED optical system, a developing device, a transfer device, a static eliminator, and a cleaner are arranged around the photosensitive drum. During recording, the surface of the rotating photosensitive drum is uniformly charged by a pre-charger, then a latent image corresponding to the image light is formed by a latent image forming means, and this is developed by a developer using toner. . The developed image is transferred by a transfer device to a sheet of paper sent between the transfer device and the photosensitive drum, and the transferred image on the paper is fixed by a fixing device. After the transfer has been completed, the surface of the photosensitive drum is neutralized by a static eliminator and cleaned by a cleaner.

Chargers used in electrophotographic recording devices with such a structure and function, especially the corona wire of the pre-charger, are often contaminated by toner scattering and oxide adhesion, and usually need to be cleaned regularly. It is.

[Conventional technology]

FIG. 4 is an explanatory diagram of a conventional charger cleaning procedure. In the figure, 1 is a front charger equipped with a corona wire 2, and 3 is a cleaning tool such as a cotton swab. When cleaning the corona wire 2, the cleaning tool 3 is inserted through the opening 4 of the front charger 1, and the cleaning tool 3 is pressed against the corona wire 2 while being moved. Note that 5 is an opening provided on the back side of the front charger 1 for venting air.

[Problem that the invention attempts to solve]

However, the corona wire 2 is often made of tungsten with a diameter of about 60 μm and has low mechanical strength, so the conventional cleaning method described above often causes the wire to be accidentally cut.

[Means for solving problems]

The present invention provides a charger cleaning tool that can solve the above-mentioned problems, and as a means for that purpose, the present invention provides a charger cleaning tool that is positioned on either the charger main body or its holding member. A cleaning tool main body that is movable in a zigzag manner in the longitudinal direction of the corona wire of the main body and in a direction perpendicular to the longitudinal direction;
The charging device cleaning tool is constituted by the cleaning member fixed to the cleaning tool main body.

The cleaning member is made of an elastic material,
The fixed position with respect to the cleaning tool main body is set so that when the cleaning tool main body is positioned on the charger or its holding member, it comes into pressure contact with the corona wire to the extent that no overload is applied to it.

[Effect]

When cleaning the corona wire, the cleaning tool main body is positioned on the charger main body or its holding member, and in this state, the cleaning tool main body is moved in the longitudinal direction of the corona wire. During this movement, the cleaning tool body moves not only in the longitudinal direction but also in a direction perpendicular to the longitudinal direction,
The movement will be in a zigzag pattern. In this case, since the resilient cleaning member is in pressure contact with the corona wire, the corona wire can be cleaned by moving the cleaning tool main body. Moreover, since the pressing force of the cleaning member against the corona wire is set so as not to become excessive, the corona wire will not be accidentally cut during cleaning. This cleaning is performed effectively because the cleaning member moves in a zigzag pattern.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1a is a sectional view showing the structure of the pre-charger according to the present invention, and FIG. 1b is an explanatory diagram of the operation of the pre-charger. In the figure, 11 is a pre-charger cleaning tool, and 1 is a conventional This is a pre-charger main body (charger main body) equipped with a corona wire 2 similar to that shown in FIG.

The front charger cleaning tool 11 is constructed by fixing a cleaning member 13 to a cleaning tool main body 12 by adhesive or the like. The cleaning tool main body 12 includes a notch-shaped positioning portion 12a that engages with the peripheral edge portion 1a of the opening 4 of the front charger main body 1, and a handle 14. Cleaning member 1
3 is made of an elastic material such as felt, and its fixed position with respect to the cleaning tool main body 12 is determined when the positioning portion 12a of the cleaning tool main body 12 is engaged with the peripheral edge portion 1a of the front charger opening. The corona wire 2 is set to be in pressure contact with the corona wire 2 to the extent that no overload is applied to it.

The composition of the cleaning tool of the present invention is as described above,
Next, its effect will be explained.

When cleaning the corona wire, the cleaning tool 11 is positioned by engaging the positioning portion 12a with the peripheral edge portion 1a as shown in FIG. 1B. In this state, the cleaning member 13 is lightly pressed against the corona wire 2. Next, when the handle 14 is operated to move the cleaning tool main body 12 in the longitudinal direction of the corona wire 2, the corona wire 2 is cleaned by the cleaning member 13 that moves together with the cleaning tool main body 12. During this cleaning, the cleaning tool main body 12 is reliably guided by the engagement between the positioning portion 12a and the peripheral edge portion 1a, and the cleaning member 13 is guided by the corona wire 2.
Since the corona wire 2 is lightly pressed, the corona wire 2 can be cleaned reliably and easily, and the corona wire 2 will not be accidentally cut.

In the above explanation, an example was described in which cleaning is performed using the opening 4 on the front side of the front charger main body 1.
The opening 5 on the back side of the pre-charger main body 1 may also be used. In this case, the cleaning tool body may be positioned by engaging with the peripheral edge portion 1b of the opening 5.

Further, in the above explanation, an example was described in which the cleaning tool main body is engaged with the front charger main body to be movably positioned, but since the front charger main body is installed and arranged on the holding member, this holding member The cleaning tool main body may be engaged with and positioned.

FIG. 2 is an explanatory diagram of another embodiment of the present invention,
In the figure, the same parts as in FIG. 1 are given the same numbers, and the explanation thereof will be omitted, and 30 is a guide notch (guiding part). The guide notch 30 is provided on the peripheral edge portion 1a of the front charger main body 1, and is formed in a zigzag shape by changing the thickness in the width direction of the front charger main body 1, as shown in FIG. 2a. There is. Also, 3
1a and 31b are rollers, which are rotatably attached to the cleaning tool main body 12 via shafts 32a and 32b.

In the configuration described above, when cleaning the corona wire 2, the cleaning tool main body 12 is positioned with respect to the front charger main body 1 as shown in FIG. 2b, and then moved in the longitudinal direction. At this time, rollers 31a, 3
1b moves along the guide notch 30,
The cleaning tool body 12 moves in the width direction of the front charger body 1, making it possible to further enhance the cleaning effect.

Furthermore, FIG. 3 is an explanatory diagram of another embodiment of the present invention. In this embodiment, the opening 4 provided in the front charger body 1 is formed into a zigzag shape 4a and used as a guide portion as a means for vibrating the cleaning tool body 12 in the width direction while guiding it in the longitudinal direction. be.

[Effect of idea]

As described above, according to the present invention, the cleaning tool main body is positioned on the front charger or its holding member so as to be movable in a zigzag manner in the longitudinal direction of the corona wire and in the direction orthogonal to the longitudinal direction of the corona wire. Since the cleaning member having the elastic cleaning tool comes into light pressure contact with the corona wire in the state, the corona wire can be cleaned reliably and easily by moving the cleaning tool body positioned as described above. This eliminates the possibility of accidentally cutting the corona wire.

[Brief explanation of the drawing]

Figures 1a and b are diagrams for explaining the structure and operation of a pre-charger according to an embodiment of the present invention, Figures 2a and b are diagrams for explaining the composition and operation of a pre-charger according to another embodiment, and Figures 3a, b is an explanatory diagram of the structure and operation of a pre-charger of another embodiment, and FIG. 4 is an explanatory diagram of cleaning procedures for a conventional pre-charger. In the figure, 1 is a pre-charger main body (charger main body), 1a,
1b is a peripheral portion, 2 is a corona wire, 4 and 5 are openings, 11 is a front charger cleaning tool, 12 is a cleaning tool main body, 12a is a positioning portion, and 13 is a cleaning member.

Claims (1)

[Claims for Utility Model Registration] A charger body 1, a guide portion formed along the longitudinal direction of the corona wire 2 of the charger body 1 on either the charger body 1 or its holding member. a cleaning tool main body 12 that can be engaged and moved; and a cleaning tool main body 12 formed of an elastic material and fixed to the cleaning tool main body 12, the cleaning tool main body 12 being connected to either the charger main body 1 or the holding member. a cleaning member 13 that presses against the corona wire 2 to the extent that it does not apply an overload when the cleaning tool body 12 is positioned on the corona wire 2; A charging device characterized in that the charging device is configured to guide the cleaning member 13 in a zigzag pattern so as to reciprocate in a direction perpendicular to the longitudinal direction when the cleaning member 13 moves along the longitudinal direction.