JPH0244305Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> This invention relates to a copy paper guide member for transfer and separation charger. More specifically, the present invention relates to a copy paper guide member that is attached to a transfer/separation charger of an electrostatic copying machine to prevent copy paper from entering a shield case of the transfer/separation charger.

<Background and Prior Art> Conventionally, electrostatic copying machines are provided with a transfer charger that transfers a toner image on a photoreceptor onto copy paper, and a separation charger that separates the copy paper from the photoreceptor. In order to prevent the copy paper conveyed between the separation charger and the photoreceptor from entering the transfer and separation charger and causing a paper jam, various copy paper guide means are used.

However, for example, in the case where Mylar is pasted across the shield cases of both the transfer charger and the separation charger as a guide means, the pasted Mylar tends to peel off and cause trouble, and because it is fixedly attached, It is difficult and troublesome to clean the inside of the shield case or replace the discharge wire. In addition, there is a method in which an insulated wire is wound around the shield case to be used as a guide means, but the work of winding the wire around the shield case is complicated and is disadvantageous in terms of cost. There is a disadvantage that the replacement work is difficult. Furthermore, Utsukai Showa 58-
As disclosed in Publication No. 138951, in the case of a device in which a plurality of guide fins are integrated into a single removable support plate, the support plate can be removed together with the guide fins for cleaning or discharging wires. Although this method simplifies the replacement work, it has the disadvantage that the manufacturing cost is very high.Also, since the main purpose is to prevent paper jams on the separation charger side, it is difficult to replace the paper when the copy paper is bent. However, paper jams tend to occur on the transfer charger side, and there are also disadvantages in that the copy paper is separated from the surface of the photoreceptor and the transfer cannot be performed reliably.

This invention was created in view of these problems, and has a simple structure, low cost, and easy installation. It also guides the copy paper in both the transfer charger and the disassembly charger, completely preventing paper jams. It is an object of the present invention to provide a copying paper guide member that can perform printing and transfer reliably.

<Structure> The copy paper guide member of this invention to achieve the above object is a plate-shaped copy paper guide member that is curved and inserted and held in the shield case of a separate charger, and the above shield case is attached to the center part. A contact portion is formed on one side wall of the shield case, and an engaging portion for the other side wall of the shield case is formed on both sides.
A separation section guide is formed to prevent paper jams in the separation charger, and a center portion continuous with the separation section guide is curved and protrudes toward the rear side to guide copy paper in a transfer charger connected to the separation charger. It is characterized by a transfer section guide formed therein.

<Examples> Examples will be described in detail below with reference to the accompanying drawings showing examples.

Figure 1 shows a transfer charger T and a separation charger B equipped with a copy paper guide member 1 according to this invention.
The transfer charger T and the separation charger B are integrally formed, and a discharge wire H for corona discharge is stretched inside each shield case S.

The copy paper guide member 1 is elastically curved and inserted and held in a U-shape between the side walls of the shield case S of the separate charger B. As shown, it has a thin plate shape, with an abutting part 11 for one side wall of the shield case S formed in the center and engaging parts 12 for the other side wall of the shield case S symmetrically formed on both sides. There is. Further, the engaging portion 12 is formed with a protrusion 13 for fitting into the hole K formed in the side wall of the shield case S, and is curved into a U-shape so that when attached to the shield case S, the protrusion 13 is formed. Care has been taken to ensure that the condition does not release easily. A space 14 is formed between the abutting portion 11 and the engaging portion 12 so as not to interfere with the discharge wire H during installation. Furthermore, a separation section guide 15 is formed on the upper side of the copy paper guide member 1 to prevent paper jams by preventing copy paper from entering the shield case S on the separation charger B side. A transfer section guide 16 is formed on the central side that is continuous with the section guide 15 and protrudes toward the rear side in a curved state to guide the copy paper in the transfer charger T.
The transfer section guide 16 is constructed by dividing the upper center of the copy paper guide member 1 into left and right parts and cutting grooves 17 in the left and right direction over a predetermined length. In some cases, it is recommended that the transfer charger extends diagonally across the T side, that is, not parallel to the copy paper transport direction shown by arrow X, but at a predetermined angle inclination, to ensure uniformity without interfering with corona discharge to the copy paper. This is preferable because it can ensure sufficient charging. Note that a fitting groove 18 for the central side wall of the shield case S is formed at the boundary between the separation section guide 15 and the transfer section guide 16, so that the transfer section guide 16 can be reliably fixed in position. It's summery.

The above-mentioned copy paper guide member 1 is press-molded from a flexible material with elasticity so that it is securely held in a predetermined position by its own elastic restoring force when attached to the shield case S. An example of this material is 0.3mm thick.
For example, thin Mylar sheets or hard vinyl chloride sheets can be used.

The copy paper guide member 1 is formed so that the transfer portion guide 16 is close to the photoreceptor D and the leading end thereof is somewhat lower than the upper edge extension line of the separation portion guide 15 when the copy paper guide member 1 is installed. Ori,
This prevents the copy paper from separating from the photoreceptor D, and also prevents the leading edge of the copy paper from colliding with the leading edge of the transfer section guide 16.

On the other hand, the transfer section guide 16 may be formed to have an even longer overall length, and the overall shape of the copy paper guide member 1 is not limited to the illustrated shape.

<Effects> According to the copy paper guide member of this invention configured as described above, it can be held in a predetermined position by simply bending it into the shield case and inserting it, and it can be installed extremely quickly and easily. In addition to being easy to remove,
This is extremely convenient when cleaning the inside of the shield case or replacing discharge wires is required.

In addition, since it is plate-shaped and has a simple structure, it can be easily manufactured by press molding or the like, and is suitable for mass production and can be provided at low cost.

Furthermore, the separation part guide and the curved transfer part guide that protrudes from the back can reliably prevent copy paper from entering the shield case, completely preventing problems caused by paper jams, and especially for transfer Since the copy paper can always be brought close to the transfer member by the section guide, even if the copy paper is bent, the transfer can be performed reliably.

Therefore, it is possible to provide a device that has a simple structure, is inexpensive, is easy to install and remove, and can reliably convey and transfer copy paper, and has various excellent practical effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the copy paper guide member according to the invention in a state where it is installed, FIG. 2 is a side view of the same, and FIG. 3 is a front view of the copy paper guide member before it is installed. 1... Copy paper guide member, 11... Contact portion, 1
2... Engaging portion, 13... Protruding piece, 15... Separation portion guide, 16... Transfer portion guide, T... Transfer charger, B... Separation charger, S... Shield case, D... Photoreceptor .

Claims (1)

[Claims for Utility Model Registration] 1. A plate-shaped copy paper guide member that is curved and inserted and held within a shield case of a separation charger, the member having a central portion that abuts against one side wall of the shield case. In addition, an engaging portion for the other side wall of the shield case is formed on both sides, and a separation portion guide for preventing paper jams in the separation charger is formed on the upper side, and furthermore, a separation portion guide is formed on the upper side to prevent paper jams in the separation charger. Copying for transfer and separation charger, characterized in that a transfer portion guide is formed on the continuous center side to curve and protrude to the rear side and guide the copy paper in the transfer charger connected to the separation charger. Paper guide member. 2. The copying paper guide member for a transfer/separation charger according to claim 1 of the above-mentioned utility model registration, wherein the engaging portion is formed with a protrusion for fitting into the hole in the side wall of the shield case.