JPH08202123A - Corotron in electrophotographic equipment - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a corotron in an electrophotographic apparatus, and an object of the present invention is to provide a corotron using a spring for the purpose of maintaining the tension of a wire for generating a corona discharge. It is to facilitate the wire replacement work and improve workability. [Structure] Wire 9 as a source of corona ions, wire holders 2 and 13 for holding and positioning wire 9, and spring 1 for applying a certain amount of tension to wire 9.
1. Hook 12, spring 1
1 for fixing the wire 9 to the wire 9, a fixing member 5 for fixing one end of the wire 9, a plug rod 1 serving as an electrode to which a high voltage is applied, and a voltage applied to the plug rod 1 for the wire 9
It comprises a terminal 3 to be delivered to the terminal, a plug rod 1, a lock nut 4 for connecting the terminal 3 to the wire holder 2, and a shield 14 for properly radiating the corona charge from the wire 9 to the object.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corotron for an electrophotographic apparatus which requires a function of charging or discharging an object by using a wire.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional method for attaching a wire of a corotron. First, the wire 9 is wound around the ring 10 once, the wire 9 is twisted, and the ring 10 is rotated to fasten the wire 9. The ring 10 is hooked on the end of the spring 11 hooked on the hook 12 of the wire holder 13, and one end of the wire 9 is held and pulled to the wire holder 2. Next, the wire 9 is inserted between the terminal 3 and the polyester washer 7 and is hung on the screw 6.
In order to keep the wire tension so as not to cut the wire 9, first the spring 11 is stretched, and then the screw 6 is tightened while pulling the end portion so that the wire 9 is stretched straight.

According to this method, in order to attach the wire 9 without breaking the wire 9 with a certain amount of tension, the spring 11 is extended with one hand to some extent and the plug rod is extended with the other hand. Wire 9 on one side
It is necessary to perform an operation of tightening the screw 6 by hand holding the end of the wire 9 while holding the end and winding the screw 6 half a turn. That is, since it is necessary to hold the wire 9 with one hand and simultaneously tighten the screw 6 with one hand, a skillful operation of tightening the screw 6 so as not to loosen the tension of the wire 9 is required. Will be needed.

[0004]

In the conventional method for fixing a wire, when fixing the wire while giving tension to the wire, the spring attached for the purpose of maintaining the wire tension with one hand is pulled while the other is fixed. Since the wire is pulled by hand and the screw is tightened and fixed, the work is difficult and a certain degree of skill is required. Also, if the spring tension is high, it is difficult to pull and maintain the spring to a certain length, and as a result,
The tension of the stretched wire causes a problem such as a variation occurring each time the wire is replaced and the wire being cut accidentally.

Therefore, an object of the present invention is to facilitate the wire replacement work of a corotron that uses a spring for the purpose of maintaining the tension of the wire that causes corona discharge, and to improve the workability.

[0006]

In order to solve the above problems, in a corotron in the electrophotographic apparatus of the present invention, a fixing member inserted in a terminal having a circular hole at a terminal portion where a wire is attached. By rotating 90 ° by 90 °.

[0007]

By providing the above means, it becomes relatively easy to stretch the wire of the corotron with a certain amount of tension, and the workability is improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. Insulating wire holders 2 and 13 for the purpose of positioning and holding the wire 9 are attached to both ends of the conductive shield 14 in the longitudinal direction by screws or the like. The wire holder 13 has a hook 12 on which a spring 11 is hooked and a ring 10 for directly attaching the wire 9 is hooked. One end of the wire 9 is attached to the ring 10 by twisting the wire 9. Wire holder 2
A conductive plug rod 1 as an electrode portion is attached with a lock nut 4 via a conductive terminal 3. The terminal 3 is provided with a hole for passing a fixing member 5 that is hard and has elasticity, such as plastic, and the hole has a groove as shown in FIG. The fixing member 5 can move up and down when the minus type screw groove and the groove of the terminal 3 are in the vertical direction, and the fixing member 5 is slightly lifted to move the wire 9 between the fixing member 5 and the terminal 3. You can go in.
When the wire 9 is caught, it is rotated by 90 ° in a minus type screw groove of the head of the fixing member 5 with a minus driver or the like. Then, the fixing member 5 is locked to the terminal 3 and the wire 9 is fixed.

In the embodiment shown in FIG. 2, a leaf spring 15 bent in a U-shape is provided between the foot of the fixing member 5 and the surface of the terminal 3 on which the wire 9 is not attached. In the fixing member 5, the head portion of the fixing member 5 is pressed against the terminal surface on the side where the wire 9 is attached by the leaf spring 15, so that a force to pinch the wire 9 can be obtained. In the embodiment shown in FIG. 3, a coil spring 8 is provided instead of the leaf spring 15. The coil spring 8 has the same effect as the leaf spring 15.

[0010]

According to the corotron of the electrophotographic apparatus of the present invention, at the time of wire replacement, the terminal is provided while applying a proper tension to the wire, that is, in the state where the spring for applying a tension to the wire is properly extended. Since the fixing member is rotated by only 90 ° when the wire is fixed to the wire, it is not necessary to perform a quick operation such as when tightening the screw, and the wire can be replaced easily and quickly. Therefore, the problem of accidentally cutting the wire is reduced, and the wire can be fast fixed, so that the variation in the wire tension is reduced.

[Brief description of drawings]

FIG. 1 is a plan view and a side view showing an embodiment of a corotron according to the present invention.

FIG. 2 is a plan view and a side view showing another embodiment of the corotron according to the present invention.

FIG. 3 is a plan view and a side view showing another embodiment of the corotron according to the present invention.

FIG. 4 is a plan view and a side view showing a conventional corotron.

[Explanation of symbols]

1 ... Plug rod 2,13 ... Wire holder 3 ... Terminal 4 ... Lock nut 5 ... Fixing member 6 ... Screw
7 ... Polyester washer 8 ... Coil spring 9 ... Wire 10 ... Ring 11 ... Spring 12 ...
Hook 14 ... Shield 15 ... Leaf spring

Claims (2)

[Claims] 1. In a corotron in which an elastic member for generating tension is provided at one end of a wire and the other end of the wire is fixed, a fixing member having a split pin shape is used as a method of fixing one end of the wire to a terminal. A corotron in an electrophotographic apparatus, which is characterized by rotating and pinching a wire to fix it. 2. The corotron in the electrophotographic apparatus according to claim 1, wherein an elastic member is provided between the foot of the fixing member and the terminal.