JPH07253728A - Transfer electrode - Google Patents

Abstract

PURPOSE:To facilitate the assembly and the detachment of an electrode in/from an image forming device and to easily perform design by providing a supporting member having an attaching part, an electrode main body coupled with one end of the supporting member and an electrode wire. CONSTITUTION:This transfer electrode is constituted of the supporting member 4, the electrode main body 5 coupled to be turned up and down with respect to the member 4, and the electrode wire 6 stretched and laid inside the member 4 and the main body 5. While keeping the main body 5 bent as it is by a hinge mechanism part at the coupling part, the notched part 41 of the attaching part 40 is fitted in a bolt erected on either frame of a copying machine main body, and then the bolt is locked by a nut so as to fix the attaching part 40. Next, the main body 5 is streched straight, the position of the other attaching part 50 is aligned with a part corresponding to the other frame of the copying machine main body, and a through hole part for a screw 51 is aligned with a hole for an attaching screw formed on the frame, then the main body 5 is fixed by tightening a screw.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer electrode for transferring a toner image on a photosensitive drum of an image forming apparatus such as a copying machine onto a sheet.

[0002]

2. Description of the Related Art Generally, in a copying machine which is an image forming apparatus, after a document is exposed to form an electrostatic latent image, a toner image formed on a photosensitive drum which has been subjected to a developing process is statically discharged. Transfer electrodes for transferring to paper by electric power,
It is provided close to the photosensitive drum.

As an example, a copying machine having a general shell structure is shown in FIG. The copying machine having a shell structure is composed of a lower machine unit 1 and an upper machine unit 2, and the upper machine unit 2 is connected to the lower machine unit 2 in an openable and closable manner.

The lower mechanical section 1 has a sheet feeding mechanism for feeding a sheet to a photosensitive drum, and a fixing device 1 for fixing a toner image.
5. A paper ejection mechanism for ejecting the fixed paper is accommodated, and the upper mechanical section 2 has a mounting table on which an original is placed, an optical unit for forming an optical image of the original, a photosensitive drum, A developing unit 20 for forming a toner image from the electrostatic latent image on the photosensitive drum is housed. FIG. 5 shows a state in which the pre-transfer conveying roller, the transfer electrode and the like of the lower machine unit 1 and the photosensitive drum and the like of the upper machine unit 2 are removed.

A bolt 11 for fixing one end of the transfer electrode is erected on the upper part of the main body frame 10a (the rear side in the drawing) of the lower machine section 1 and an upper part of the main body frame 10b (the front side in the drawing). Is provided with a screw hole (not shown) for fixing the other end of the transfer electrode. The transfer electrode is
It is composed of an electrode case having a substantially rectangular tube shape and having an opening on one side, an electrode wire stretched in the electrode case, a body mounting member fixed to both ends of the electrode case, and the like. And using the screw hole,
It is attached while adjusting the position so that it will fit in the empty space created by the other components.
When is closed, it is arranged at a predetermined position close to the photosensitive drum.

[0006]

However, in the conventional transfer electrode as described above, since the electrode case and the main body mounting member are fixed and there is no bending portion and there is no degree of freedom, it is possible to make the copying machine into a considerably narrow empty space. There is a problem that the work is difficult to perform when attaching and detaching.

Further, since the assembly is completed before being mounted on the copying machine, the tension of the electrode wire must be adjusted accurately when the transfer electrode is assembled as a single unit, which requires accuracy in design. There are challenges.

SUMMARY OF THE INVENTION The present invention has been made in view of these problems of the conventional transfer electrode, and an object of the present invention is to provide a transfer electrode which can be easily assembled and removed from an image forming apparatus and can be easily designed. is there.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a support member having at one end a mounting portion for mounting to a frame of an image forming apparatus, and an electrode body rotatably connected to the other end of the support member. A transfer electrode provided with the supporting member and an electrode wire stretched inside the electrode body.

[0010]

According to the present invention, since the supporting member and the electrode body are rotatably connected and bent at that portion, when the mounting portion provided on the supporting member is mounted on the frame of the image forming apparatus, the mounting member is mounted. Cheap.

Further, after the mounting portion is mounted on the frame of the image forming apparatus, the slack of the electrode wire stretched inside the supporting member and the electrode body is removed by straightening the supporting member and the electrode body. .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing its embodiments.

1A and 1B are a side view and a plan view showing a transfer electrode according to an embodiment of the present invention, respectively. That is, the transfer electrode includes a support member 4, an electrode body 5 that is vertically rotatably connected to the support member 4, and an electrode wire 6 that is stretched inside the support member 4 and the electrode body 5. Etc.

The supporting member 4 is a plate-shaped transparent plastic mounting portion 40 provided with a notch portion 41 for mounting on the body frame of a copying machine, a second member 4b joined to the mounting portion 40, and a second member thereof. The columnar member 42, which is joined to the end surface of the 2 member 4b at a position shifted in the direction perpendicular to the electrode wire direction (see FIG. 1B) and serves as the rotation axis of the hinge mechanism of the connecting portion, is formed on both side surfaces. It is composed of the provided first member 4a and the like. The first member 4a has a substantially rectangular tube shape, and the second member 4b has a substantially quadrangular shape with a step in the middle of the lower surface, both of which are made of transparent plastic. or,
The upper surface of the second member 4b is covered by the milky-white plastic plate 43 with a part of the mounting portion 40 side opened.

On the other hand, the electrode main body 5 is made of a transparent plastic mounting end 50 having a screw through hole 51 for mounting on the frame of the copying machine main body, and an electrode case 55 joined to the mounting end 50. A transparent plastic joining member 53 joined to the electrode case 55 and having a main body connecting portion 53a and an upper cover portion 53b, and the joining member 53.
And a L-shaped cutout portion 52a for receiving the columnar member 42 provided on the first member 4a of the support member 4 and having a U-shaped metal bearing member 52 and the like.

The electrode wire 6 has one end at the electrode case 5.
5 is attached to the end 54 on the side of the attachment end 50, and the other end is connected to a spring 61 for giving an appropriate tension, and the other end of the spring 61 is further a metal plate 62 serving as a lead wire.
And is stretched inside the support member 4 and the electrode body 5.

FIG. 2 is a view showing the hinge mechanism of the support member 4 and the connecting portion of the above embodiment, and FIG. 3 is an enlarged view of the connecting portion. 2 or 3, the metal plate 62 is provided on the second member 4b of the support member 4.
A plastic plate 43 is attached such that one end thereof is connected to the voltage applying wiring so that a part thereof is open, and the second member 4 a is fitted to the bearing member 52. This second
The joining member 53 is provided on the upper side and the lower side of the member 4a, respectively.
Gaps 70a and 70b are formed between the upper cover portion 53b and the lower plate portion of the bearing member 52, and are configured to be vertically rotatable with respect to the electrode body 5. Therefore, the support member 4 is attached to the electrode body 5 (or the electrode body 5 is attached to the support member 4) by the distance between the gaps 70a and 70b.
It can be rotated.

Next, the operation of the transfer electrode of the above embodiment will be described with reference to FIGS. 4 (a) and 4 (b).

First, for example, when the transfer electrode is to be attached to a shell type copying machine (see FIG. 5), FIG.
As shown in FIG. 3, the notch portion 41 of the mounting portion 40 is fitted into the bolt 11 that is erected on the one frame 10a of the copying machine body while the electrode body 5 is bent at the hinge mechanism portion of the connecting portion for easy mounting. After that, the nut 12 is fastened to the bolt 11 to fix the mounting portion 40.

Next, as shown in FIG. 4 (b), the electrode body 5 is extended straight and the position of the other mounting end portion 50 is aligned with the corresponding portion of the other frame 10b of the copying machine body. After the screw through hole portion 51 is aligned with the mounting screw hole 13 formed in the frame 10b, the screw 14 is tightened and fixed.

On the other hand, when the transfer electrode is to be removed, the work reverse to the above may be carried out. First, the screw 14 is loosened and removed, and then the nut 12 is loosened and removed while bending the electrode body 5, and the transfer electrode is transferred. It may be removed with the electrodes bent.

As described above, when the transfer electrode is attached to or detached from the copying machine, the connecting portion can be bent, so that the degree of freedom in handling can be increased and the assembling can be easily performed. Further, when the electrode body 5 is bent, the electrode wire 6 is routed so as to be shorter than the route 6a of the electrode wire 6 which should be passed when the electrode body 5 is straightened as shown in FIG. 4 (a). Since the electrode wire 6 is set straight, the electrode wire 6 is pulled when the electrode body 5 is straightened, so that the slack of the wire can be removed. As a result, the design of the electrode wire 6 becomes easier.

In the above embodiment, the rotating portion is the hinge mechanism formed by the combination of the columnar member 42 and the bearing member 52, but it is not limited to this as long as it can be bent.

Further, in the above-mentioned embodiment, although it is configured to be vertically vertically rotatable, the present invention is not limited to this, and it may be rotatable in other directions such as a horizontal direction or an oblique direction.
In short, it suffices if the transfer electrode can be bent in the direction most easily assembled.

Further, in the above embodiment, the supporting member 4, the joining member 53 and the like are made of transparent plastic, but the materials constituting them are not limited to this.

[0026]

As is apparent from the above description, the present invention provides a support member having a mounting portion, an electrode body rotatably connected to the other end of the support member, the support member and the electrode body. Since it is provided with an electrode wire stretched inside, it has an advantage that the work of assembling and dismounting to the image forming apparatus is easy and the design is easy.

[Brief description of drawings]

FIG. 1 (a) is a side view showing a transfer electrode according to an embodiment of the present invention, and FIG. 1 (b) is a plan view thereof.

FIG. 2 is a perspective view showing a part of a transfer electrode of the same example.

FIG. 3 is a perspective view showing a connecting portion of the transfer electrode according to the embodiment.

FIG. 4A is a schematic diagram showing a bent state of a transfer electrode of the same example, and FIG. 4B is a schematic diagram showing a straightened state of a transfer electrode of the same example. .

FIG. 5 is a perspective view showing a configuration of a copying machine having a general shell structure.

[Explanation of symbols]

 1 Lower Machine Section 2 Upper Machine Section 3 Transfer Electrode 4 Support Member 5 Electrode Main Body 6 Electrode Wires 10a, 10b Main Body Frame 15 Fixing Device 20 Developing Unit 40 Mounting Part 42 Cylindrical Member 50 Mounting End Part 52 Bearing Member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideo Fukuda 1-2-2 Tamatsukuri, Chuo-ku, Osaka-shi, Osaka Mita Industry Co., Ltd.

Claims (2)

[Claims] 1. A support member having an attachment portion at one end for attaching to a frame of an image forming apparatus, an electrode main body rotatably connected to the other end of the support member, and the support member and the electrode main body. A transfer electrode comprising an electrode wire stretched inside. 2. The electrode wire has a route in which the support member and the electrode body are in a straight state through a route longer than a route in a state in which the support member and the electrode body are bent. The transfer electrode according to claim 1, wherein: