JPH044848Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a so-called masking jig that prevents paint from adhering by covering parts of the object to be painted where it is not desired for paint to adhere during work such as painting. It is.

(Conventional technology) If you want to prevent paint from adhering to a certain area during painting work, there are chemical methods such as applying oil to repel the paint, as well as physical methods such as pasting tape and covering the area. However, in order to prevent paint from adhering to the inner surface of the hole, the general practice is to make a material such as metal or rubber to match the shape of the hole and fit it into the hole.

(Problem that the invention aims to solve) Especially when the hole is not a screw hole, an elastic material such as rubber molded slightly larger than the hole shape is pushed into the hole to serve as a masking jig. It is tiring for the operator to have to insert and press fit.

(b) There is a risk that the press-fitting force may vary depending on the worker and the product may fall out.

C. Because the masking jig is press-fitted, it is subject to severe wear, so if the masking jig is used for repeated industrial production, the jig must be discarded after a few uses and replaced with a new one, otherwise coating defects will occur, resulting in quality and cost issues. The loss is huge.

The present invention has been devised to solve the above-mentioned problems.

(Means for solving the problem) In order to achieve the above object, the paint adhesion prevention tool of the present invention is constructed as follows.

(a) A body 1 that is slightly smaller than the masking hole 6 of the object to be painted 5 and made of an elastic material such as rubber to match the shape of the masking hole, with a hole drilled in the center (b) A body 1 that has an outer diameter that is slightly smaller than the center hole diameter of the body 1. A hexagonal bolt 2 consisting of a shaft portion with a length under the neck longer than that of the main body 1 and a head having the same diameter as the bottom diameter of the main body 1. A washer 3 has an outer diameter that is the same as or slightly smaller than the outer diameter of the main body 1, and a hexagonal cap nut 4 has an inner diameter that engages with the bolt 2 and has an outer diameter that is the same as or slightly smaller than the outer diameter of the washer 3.

When the hex bolt 2 is inserted into the center hole from the bottom of the main body 1 and the washer 3 is placed on the top of the main body 1, the bolt 2 protrudes from the washer 3, but the cap nut 4
Set the female thread length to be longer than the bolt on this protruding part.

(Function) Based on the above structure, when using the paint adhesion prevention device of the present invention, (a) insert the hexagonal bolt 2 into the center hole from the bottom of the main body 1, and insert the hexagonal bolt 2 from the tip of the bolt 2 protruding from the top of the main body 1. Put the washers 3 in, temporarily tighten the bag nuts 4, and assemble.

(b) Insert the paint adhesion prevention tool of the present invention into the hole (masking hole 6) to prevent paint from adhering to the object 5 to be painted, and tighten the bag nut 4.

C. The length of the female threaded part of the cap nut 4 is longer than the length of the bolt 2 protruding from the washer 3, so the main body 1 sandwiched between the cap nut 4 and the head of the bolt 2 can be compressed from above and below by this long length. Due to the vertical compression, the main body 1 expands laterally and is pressed against the masking hole 6, and this force fixes the main body 1 in the masking hole.

D. After this masking step, the object 5 to be painted can be loosened again by loosening the screw of the cap nut 4, and the vertical compression of the main body 1 sandwiched between the cap nut 4 and the head of the bolt 2 will be removed, and the lateral The spread of the main body 1 in the direction is also restored, and the paint adhesion prevention device can be removed from the masking hole 6.

(Embodiment) FIG. 1 shows an exploded perspective view of an embodiment of the present invention. FIG. 2 is an enlarged sectional view of the paint adhesion prevention device fitted into the masking hole 6.

FIG. 3 shows an enlarged sectional view of the paint adhesion prevention device fixed in the masking hole 6 by tightening the cap nut 4.

The shape of the main body 1 can be molded to match the shape of the masking hole 6 of the object 5 to be coated, so that it can be made into various shapes.

Bolt 2 and cap nut 4 are hexagonal, but round or square are also easily available. The nut does not have to be a cap nut; it can be a regular nut, as long as the depth of the threaded part to be tightened is determined in relation to the bolt.

Furthermore, although the present invention is aimed at preventing the adhesion of paint, it can also be applied to commonly applied materials such as oil, rather than paint.

(Effect of idea) The following effects can be expected from this invention.

B. The length of the female thread part of bag nut 4 is washer 3.
Although it is longer than the length of the bolt 2 that protrudes more, this length is the compression allowance for the main body 1, and since it is a cap nut, the position at which the bolt 2 is tightened is fixed, so the operator can decide how far to tighten it. You can be aware of moderation and eliminate variations in tightening by workers.

(b) As a result, the adhesion force of the paint adhesion prevention device of the present invention to the masking hole 6 is kept constant, and it is possible to prevent the occurrence of defective products due to omissions due to individual differences among workers.

C. The adhesion force is due to the pressure of the elastic body of the main body 1 against the masking hole 6, and it is not pushed from the top of the masking hole, so there is less wear and this paint adhesion prevention tool can be used for a long time and is advantageous in price. It is.

(d) Even complex hole shapes can be accommodated by molding the main body to suit, and the range of application is wide.

Ho bolts, nuts, and washers can be selected from any commercially available products, and can be manufactured at low cost.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment of the paint adhesion prevention device of the present invention, Fig. 2 is an enlarged cross-sectional view of the paint adhesion prevention device fitted into the masking hole, and Fig. 3 is a cap nut tightened to prevent paint from sticking. An enlarged sectional view of the adhesion prevention tool fixed to the masking hole. 1... Body, 2... Bolt, 3... Washer, 4... Cap nut, 5... Object to be painted, 6... Masking hole.

Claims (1)

[Scope of utility model registration request] Slightly smaller than the masking hole 6 of the object to be painted 5,
The main body 1 is made of an elastic material such as rubber and has a hole in the center according to the shape of the masking hole, has an outer diameter slightly smaller than the diameter of the center hole of the main body 1, and has a length below the neck that is longer than the main body 1. A hexagon bolt 2 consisting of a threaded shaft and a head having the same diameter as the outer diameter of the bottom of the main body 1, and a hexagonal bolt 2 having the same inner diameter as the center hole diameter of the main body 1 and the outer diameter of the main body 1. The washer 3 has an outer diameter that is the same as or slightly smaller than the washer 3, and has an inner diameter that engages with the bolt 2 and has an outer diameter that is the same as or slightly smaller than the outer diameter of the washer 3. Insert bolt 2 into the center hole and attach washer 3
A paint adhesion prevention tool comprising a cap nut 4 having a structure having a female thread part longer than the shaft length of the more protruding part.