JP3049580B2 - Conductive washer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer used when two painted metal members are screwed together by bringing their surfaces into conductive contact with each other. When peeling off the temporarily affixed masking film, the adhesion with each metal member partially peeled off,
The present invention relates to a conductive washer for preventing reliability of conduction through two metal members from being impaired.

[0002]

2. Description of the Related Art Conventionally, a conventional conductive washer is applied to a metal surface of a noise filter to secure grounding, or to a bonding surface of a metal housing or the like to stabilize contact resistance. Used. For the example used for the latter purpose,
This will be described with reference to a perspective view when FIG. 3 is applied. In addition,
This figure is common also when the embodiment is applied. In the figure, two metal fittings 5 and 6 are brought into contact with each other at their flat portions and screwed together using washers 8 and small screws 7. At this time, in order to ensure conduction at the joints of the respective flat portions, in other words, to stabilize the contact resistance, the conductive washers 11
Are adhered to the surfaces of the metal fittings 5 and 6 by the conductive adhesive on the lower surface.

Incidentally, the conductive washer 11 can also be applied when the surfaces of the metal fittings 5 and 6 are painted. Before the coating, the conductive washers 11 are attached to the surfaces of the metal fittings 5 and 6. After coating the entire surface of each of the metal fittings 5, 6, a masking film (not shown) temporarily attached to the surface of the conductive washer 11 is peeled off to expose each conductive surface (metal surface). A step of fastening with screws and conducting connection is taken. The above will be described in more detail with reference to a cross-sectional view of FIG. In FIG. 4, a conductive washer 11 is adhered to the upper surface of the metal fitting 5 before painting by an adhesive coated on the lower surface. Reference numeral 5a is a hole through which a small screw for screw fastening penetrates. A masking film 12 is temporarily attached to the upper surface of the conductive washer 11. Thereafter, the entire surface is painted and covered with the coating film 14. Next, the coating film 14 is cut with a sharp tool from the direction of arrow Q to expose the edge of the masking film 12. Next, the masking film 12 is peeled off by using this as a starting point, and the upper surface of the conductive washer 11 is exposed, that is, a conductive surface is formed.

Here, the storage state of the conductive washer 11 will be described with reference to the perspective view of the conventional example shown in FIG. In FIG. 5, conductive washers 11 to which a masking film 12 has been temporarily adhered are lined and adhered to the upper surface of a common strip-shaped release paper 9 with an adhesive coated on the lower surface. In the drawing, the masking film 12 of the right conductive washer 11 is shown in a partially peeled state. The following manufacturing steps are taken before the storage state. The conductive washers 11 are arranged and attached to the release paper 9. On top of that, a strip-shaped masking film 1
After temporarily attaching 2, the masking film 12 is cut in such a manner that the outer shape and hole of the conductive washer 11 are removed, and a portion other than the surface of the conductive washer 11 is removed.

[0005]

The prior art has the following problems. In FIG. 4, when the coating film 14 is cut with a sharp tool from the direction of arrow Q to expose the edge of the masking film 12, the edge of the conductive washer 11 is also cut and adhered to the metal fitting 5. There is a danger of partial peeling. This is not a matter of carelessness, since the work is very detailed and requires skill, but can occur even with great care. Conductive washer 11
If the adhesive between the metal member and the metal fitting 5 is partially peeled off, the peeling may increase before the screw is fastened to the mating side in a later step, and even if it does not expand, the reliability of conduction with the mating side is impaired. You.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to remove the masking film temporarily adhered to the surface after coating each metal member, and to adhere to each metal member. Is to provide a conductive washer that prevents the conductive washer from being partially peeled off and impairing the reliability of conduction through the surfaces of the two metal members.

[0007]

According to a first aspect of the present invention, there is provided a conductive washer having a conductive adhesive coated on one surface, two masking films on the other surface, two layers overlapping at an intermediate portion and both ends being overlapped. So that each part has one layer,
It is temporarily attached in a shifted form.

According to a second aspect of the present invention, a conductive washer is coated on one side with a conductive adhesive, and two masking films on the other side are overlapped in two layers at an intermediate portion, and are formed into one layer at both ends. A washer that is temporarily stuck in a displaced manner, and is temporarily stuck on a common release paper by the conductive adhesive on the one surface.

According to a third aspect of the present invention, in the washer according to the first or second aspect, a portion where two masking films overlap each other has a parallel band shape. A conductive washer according to a fourth aspect is the washer according to any one of the first to third aspects, wherein the other surface to which the masking film is to be temporarily attached is made of a copper foil having a fine unevenness.

[0010]

In the conductive washer according to the first aspect, the conductive washer is adhered on one surface to the surface of the metal member by the conductive adhesive, and then the entire surface of the metal member including the conductive washer is provided. Is painted. Next, near the edge of the masking film above the surface of the conductive washer, a tear is formed by tearing the coating film, and the two masking films are sequentially peeled off using this as a starting point. Is exposed. Through this conductive surface,
Similarly, the exposed conductive surface of the conductive washer attached to the surface of the metal member on the other side is brought into conductive contact, and the two metal members are
Fastened by screws passing through the conductive washers.

[0011] In the conductive washer according to the second aspect, prior to use, a plurality of the conductive washers according to the first aspect are temporarily adhered on one surface to the common release paper by the conductive adhesive. Organized and stored. In use, after the conductive washer is peeled off from the release paper, the same method as described in the preceding paragraph is taken. In particular, in the conductive washer according to the third aspect, each of the two masking films is manufactured as a parallel strip-shaped tape.

In the conductive washer according to the fourth aspect, since the material of the conductive washer is copper foil and the other surface on which the masking film is to be temporarily attached is finely roughened, the conductive washer on the mating side is formed. Reliable conductive contact with the washer is supported.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a conductive washer according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view at the time of an intermediate step according to the application of the embodiment. The meaning of the intermediate step means that a step of removing the coating film 4 and the masking films 2 and 3 covering the conductive washer body 1 in FIG. . In FIG. 1, the conductive washer main body 1 is adhered to the upper surface of the metal fitting 5 before painting by a conductive adhesive coated on the lower surface. The conductive washer body 1 is made of copper foil whose surface side is finely roughened, and has a hole 5 through which a small screw for screw fastening penetrates at the center.
a. On the upper surface of the conductive washer main body 1, two masking films 2 and 3 are temporarily adhered so as to be shifted from each other so as to overlap in two layers at an intermediate portion and become one layer at both ends. Thereafter, the entire surface is painted and covered with the coating film 4. Next, the coating film 4 is cut with a sharp tool from the direction of the arrow P to expose the edge of the upper masking film 3. Next, the masking film 3 is cut through this, and then the lower masking film 2
Is peeled off from each edge thereof to expose the upper surface of the conductive washer main body 1, that is, to form a conductive surface.

What is important here is that when the tear is made by breaking the coating film 4 in order to peel off each of the masking films 2 and 3, the adhesion between the conductive washer body 1 and the metal fitting 5 is partially reduced. There is no danger of stripping, and the reliability of conduction is assured. Also, the conductive washer body 1
That the surface of the surface is finely roughened ensures reliable conductive contact with the opposing conductive washer, in other words, stabilization of the contact resistance. As a result, for example, the grounding is ensured, and the anti-static performance is improved, so that the reliability of the applied device can be improved.

Here, a manufacturing process of the conductive washer body 1 will be described with reference to a perspective view of the manufacturing process of the embodiment of FIG. In FIG. 2, the conductive washer main body 1 is attached to a strip-shaped release paper 9 side by side. On top of that, two strip-shaped masking films 2 and 3 are temporarily adhered in a shifted manner so as to overlap each other at an intermediate portion of the conductive washer main body 1. FIG. 2 shows this temporarily attached state. Here, the reason that each of the masking films 2 and 3 is slightly peeled off at the right end is to clearly show that the masking films 2 and 3 overlap and are temporarily attached. Thereafter, each of the masking films 2 and 3 is cut in such a manner that the outer shape and the hole of the conductive washer body 1 are cut out, and the conductive washer body 1 is cut.
The part other than the surface of is removed.

[0016]

According to the conductive washer of the first aspect, after the conductive washer is adhered to the surface of the metal member by the conductive adhesive on one surface, the conductive washer is removed from the metal member including the conductive washer. The entire surface is painted. Next, near the edge of the masking film above the surface of the conductive washer, a tear is formed by tearing the coating film, and the two masking films are sequentially peeled off using this as a starting point. Is exposed. Via this conductive surface, the exposed conductive surface of the conductive washer similarly affixed to the surface of the mating metal member is brought into conductive contact, and the two metal members are fastened by screws penetrating the conductive washer. . Therefore, when a tear is made by tearing the coating film to peel off the two masking films, there is no danger that the conductive washer and the metal member will be partially peeled off, and the reliability of conduction will be reduced. Guaranteed.

In the conductive washer according to the second aspect, prior to use, a plurality of the conductive washers according to the first aspect are temporarily adhered side by side on one surface to the common release paper by the conductive adhesive. Organized and stored. In use, after the conductive washer is peeled off from the release paper, the same method as described in the preceding paragraph is taken. Therefore, in addition to the effects of the preceding paragraph, before use, a number of conductive washers are organized and stored,
In addition, since space can be saved, parts management is improved, and improvement in workability is supported.

In particular, in the conductive washer according to the third aspect, since each of the two masking films is manufactured as a tape in the form of a parallel belt, the ease of manufacture and the workability are improved, and the cost can be reduced. In particular, in the conductive washer according to claim 4, since the material of the conductive washer is copper foil, and the other surface to which the masking film is to be temporarily attached is finely unevenly processed, the conductive washer and the opposing conductive washer can be used. Reliable conductive contact, in other words, stabilization of contact resistance is supported. As a result, for example, the grounding is ensured, and the anti-static performance is improved, so that the reliability of the applied device can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view during an intermediate process according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating a manufacturing process of the embodiment.

FIG. 3 is a perspective view showing an application common to the embodiment and the conventional example.

FIG. 4 is a cross-sectional view at the time of an intermediate process according to the application of the conventional example.

FIG. 5 is a perspective view of a conventional example during storage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductive washer main body 2 Masking film 3 Masking film 4 Coating film 5 Metal fitting 5a hole 6 Metal fitting 6a hole 7 Small screw 8 Washer 9 Release paper

Claims (4)

(57) [Claims] 1. A conductive adhesive is coated on one side, and two masking films on the other side are overlapped in two layers at an intermediate part and one layer at both ends.
A conductive washer which is temporarily attached in a shifted form. 2. A method in which a conductive adhesive is coated on one side and two masking films on the other side are overlapped in two layers at an intermediate part and one layer at both ends.
A washer to be temporarily attached in a shifted form, wherein said one side is temporarily attached to a common release paper by the conductive adhesive. 3. The washer according to claim 1, wherein an overlapping portion of the two masking films has a parallel band shape. 4. The washer according to claim 1, wherein the other surface of the washer to which the masking film is to be temporarily attached is made of finely textured copper foil. Washers.