JPH0341826B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mechanism for attaching a corotron wire (hereinafter referred to as wire) in a charging device (corotron) in an electronic copying machine or the like.

(Prior Art) In an electronic copying machine, a means is used in which a corotron is arranged in correspondence with the surface of a photoconductive photoreceptor and a uniform electrostatic charge is applied in advance. In the corotron, a high DC voltage is applied to one end of a wire covered with a shield, and the other end of the wire is hooked to an insulator, thereby applying a certain tension to the wire.

However, in the conventional corotron, the first
As shown in the figure, a fixing device 5 such as a screw is provided to an insulator 4 incorporated in one end of a shield 2 of a corotron, and a hook 6 provided at one end of a spring 3 connected to a wire 1 is attached to the fixing device. It was common to support it by hooking it on a 5.

(Problems to be Solved by the Invention) By the way, the corotron is configured to be as narrow as possible in terms of the overall design of the copying machine, and the shield 2 is configured to have a substantially U-shaped cross section. It is required that the wire be placed near the center of the shield. Therefore, the hook 6 provided at one end of the spring is
It is necessary to position the wire by hooking it deep inside the narrow shield, and as a result, tools are required to attach and detach the wire for assembly work or to repair a broken wire. It may be difficult to keep it constant, or if you accidentally touch the wire with your hand during installation, dirt from your fingers or other objects may adhere to the wire, which may impair the uniformity of the discharge later on, or it may be easy to accidentally cut the wire. There were other drawbacks.

(Object of the Invention) The present invention improves this by attaching a hook member to one end of the wire, and providing an engaging portion structured to engage the hook member within the insulating block of the corotron shield. Therefore, it is an object of the present invention to provide a wire attachment device that allows a wire to be easily pulled and attached by simply engaging a hook member with an engaging portion without using any special tools.

EXAMPLES The present invention will be described in detail below based on examples. FIG. 2 is a perspective view of an insulating block, a hook member, and an insulating part installed in the end of the corotron;
FIG. 3 is a plan view showing the hooking member shown in FIG. 2 installed in an insulating block. In this embodiment, the hook member 8 is a convex plate, and the spring 3 at one end of the wire is attached to the hook 6 through the hole 10 provided in the convex portion 9, and the spring 3 at the other end is attached to the hook 6. is bent upward to form the knob portion 13.

On the other hand, an engaging portion 11 for engaging the hooking member 8 is provided in the insulating block 7, and the engaging portion 11 has a width slightly larger than the width of the protruding portion 9 of the hooking member 8. By providing a wide notch 14 that is narrower than the rear wide portion 12 of the hook member 8,
The hook member 8 is configured to be engaged with and fixed to the engaging portion 11.

In addition, in the present invention, the protruding part 9 is provided on the engaging part 11 by holding the hook part 8 with the spring 3 attached to the wire end in such a way that the spring is in an extended state and pinching the knob part 13 by hand. Notch 1
It can be fitted so that it fits into 4.

Further, the hooking member 8 is pulled in the wire direction by the spring 3, and the rear wide portion 12 of the hooking member 8 is engaged by the engaging portion 11 in a state where movement in the pulling direction is restrained. The wire is fixed in a predetermined position within the corotron shield with a predetermined tension applied by a spring. Incidentally, after the hook member 8 is installed inside the insulating block, an insulating cover 15 is attached onto the hook member 8. Therefore, within the insulating block, the hook member 8 is pressed from above by the protrusion 16 provided at the lower part of the insulating cover 15, so that the hook member does not come off even in the upward direction.

Since the present invention is configured as described above, the wire can be easily installed in the corotron shield by simply pinching the grip portion 13 of the hook member 8 by hand and fitting it into the insulating block. The fixing function can be achieved simply by attaching an insulating cover to the upper part of the hook member. Unlike conventional corotrons, no special tools are required to attach the wires, making the attachment process easy.

In addition, in the attachment mechanism of the present invention, when attaching the spring provided at the end of the wire to the hook member, the hook member is placed above the engaging portion and while looking directly, the length of the wire and the tension of the spring are measured. It is only necessary to insert the hook member 8 after confirming the condition, which is different from adjusting the tension state of the spring by directly hooking the spring to a fixing device such as a screw, as in the case of conventional devices. Therefore, it has the advantage that the tension state can be adjusted accurately, and the work of attaching the wire is greatly simplified. Therefore, there is less risk of cutting the wire or accidentally touching the wire with your hand during the installation process.

Of course, the shape of the hook member and the shape of the engaging portion are not limited to those shown in FIGS. 2 and 3, and the hook member may have a structure in which the spring at the wire end is attached. It may have a shape that can be fixed by engaging with the engaging part, and the engaging part must be located within the insulating block 7 and have a structure to engage and fix the hook member. Good.

Therefore, the shape of the engaging portion is, for example, the shape of the fourth
The engaging portion 11 having the shape shown in the figure may be configured, and a hook member having the same shape as shown in FIGS. It is also possible to configure an engaging portion 11 having a similar shape, and to engage the rear wide portion 12 of a hooking member having the same shape as the above-mentioned notch portion 18 .

In addition, in the above explanation, an example was shown in which the spring side of the end of the wire is attached to the hook member, but
It goes without saying that the spring may be placed on either side, such as placing the spring on the power supply side and directly attaching the wire to a hook member provided on the insulating part side.

(Effects of the Invention) Although the present invention is configured as described above, the wire can be easily installed in the corotron shield by simply pinching the hook part of the hook member by hand and fitting it into the insulating block. The hook member can be fixed simply by attaching an insulating cover to the top of the hook member.

Furthermore, unlike the case of conventional corotrons, no special tools are required to attach the wires, making the attachment process easy.

In addition, in the attachment mechanism of the present invention, when attaching the spring provided at the end of the wire to the hook member, the hook member is placed above the engaging portion and while looking directly, the length of the wire and the tension of the spring are measured. All you have to do is check the condition before inserting the hook, which is different from adjusting the tension of the spring by hooking the spring directly onto a fixing device such as a screw, which is the case with conventional devices. Therefore, it has the advantage that the tension state can be adjusted accurately, and the work of attaching the wire is greatly simplified. Therefore, there is less risk of cutting the wire or accidentally touching the wire with your hand during the installation process.

Therefore, in the present invention, when assembling or repairing a corotron device, it is possible to quickly and accurately attach and detach the wire, which is expected to improve work efficiency, and the spring can be attached to the hook member or the power supply side terminal. This prevents spring loss during maintenance work.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional corotron, Fig. 2 is a perspective view of an engaging part, a hook member, and an insulating cover that implement the present invention, and Fig. 3 is a perspective view of the hook member in Fig. 2 as an engaging part. The top view of the installed state, FIGS. 4 and 5 are perspective views of the engaging portion of another embodiment. Codes in the diagram: 1... Corotron wire, 2...
... Shield, 3 ... Spring, 7 ... Insulation block, 8 ... Hook member, 11 ... Engagement part, 15 ...
...Insulating lid, 16... Convex part.

Claims (1)

[Claims] 1. In a charging device such as an electronic copying machine that uses a corotron wire provided with a tension spring at the end and installs the wire in a corotron shield, one end of the corotron wire 1 is hooked. The hooking member 8 is engaged with the insulating block 7 disposed at one end of the corotron shield 2, and fixed using an insulating cover 15 having a protrusion 16 from the upper part to the lower part. The hooking member 8 has a protruding part 9 with a hole 10 in the center, wide parts 12 on both sides of the protruding part 9, and a knob part 13 protruding upward. The hook of the spring 3 connected to the corotron wire is locked in the hole 10 of the protrusion 9, and the insulating block 7 is provided with a notch 14 corresponding to the protrusion 9 of the hook member 8. Engagement part 11
The protrusion 9 is supported so as to protrude from the notch 14 toward the main body of the corotron shield 2, and an insulating cover 15 is attached and fixed to the upper part of the insulating block 7. Features a Corotron wire attachment mechanism.