JP2003336612A - Post-construction anchor using elastic body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily remove a component when the component becomes unnecessary, and to hold airtightness, in the component when the component is used as an anchor by inserting the component into a prepared hole and expanding itself. <P>SOLUTION: A female component wherein a nut of a screw diameter approximate to an elastic body hole diameter, having a cross sectional shape approximate to a prepared hole shape, is bonded to an end face of an elastic body tube having a similar shape thereto is prepared. Pull-out resistance force is obtained, by inserting the female component into the prepared hole, sandwiching an installed member between a head part of a male component and an elastic body part of the female component, fastening the male component, and expanding the elastic body part inside the prepared hole to tightly contact the elastic body with the inner face of the prepared hole. When the airtightness is required, the airtightness can be accomplished by closing one of holes of the nut to prevent leakage from a screw part. When loosening the male component, the expansion of the elastic body part is dissolved to allow the easy removal of all the components. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention surely attaches a member to a blind hole having various depths such as a floor surface and a wall surface, which is inaccessible on the side opposite to the entrance of the hole, and maintains airtightness. In addition, the structure makes it possible to easily remove the structure when it is no longer needed.

[0002]

2. Description of the Related Art Conventionally, when a screw cannot be directly driven into a mounting portion or when tapping cannot be performed, a prepared hole is opened and the screw is embedded therein to attach the screw to a member in some form, and then the member is attached. It has been used as a foothold for mounting.
Here are some examples.

(A) When the material of the wall surface or the floor surface is hard, brittle, or thick like concrete, after making a prepared hole, a metal anchor construction anchor is struck and the tip is expanded to prevent it from coming off. It has been used as a male or female screw.

(B) When the material is thin and fragile like the wall surface of a gypsum boat, insert it into the prepared hole of the gypsum board like a board anchor and tighten the screws to anchor the board past the board. The tip of the can extends almost perpendicular to the axis, and some stick to the board.

(C) Some products use an elastic body such as rubber like this product. Although a nut is embedded in the cylindrical portion, the outer diameter of the nut is as small as about 1/2 of the outer diameter of the cylinder, and a rubber collar is attached to the side opposite to the nut.
In this product, the anchor is fixed by making a stupid hole in a plate with a small thickness and tightening the screw to expand the rubber part at the part that penetrates the plate.

[0006]

However, although each of the conventional methods is characterized by strength and usability, it has the following problems.

Since the expansion parts are irreversible because they are made of the above (a) and (b) metals, it is extremely difficult to remove them once they are attached.

In the case of (C), the expanded portion returns to its original position and can be easily removed by loosening the screw, but it has the following drawbacks.

In the methods (b) and (c), since only the part that penetrates the plate is expanded and fixed as an anchor, the lengths of the expanded part and the non-expanded part are set according to the thickness of the plate. It is necessary to increase the number of types to correspond to the thickness of the plate.

Further, in any of the above methods, when used as an anchor penetrating the wall, there is a problem that the airtightness inside and outside the wall cannot be secured.

The present invention has been made in consideration of these drawbacks, and an object of the present invention is to provide an anchor which can be easily removed when it is no longer needed.

Another object of the present invention is to maintain airtightness on the front and back of the plate when the anchor is attached to the perforated plate surface.

Other objects of the present invention will become apparent in the following description.

[0014]

[Means for Solving the Problem] A pilot hole slightly larger than the internal threaded part (elastic body cylinder with nut) in the present invention is opened, and a part to be fastened is sandwiched between the internal threaded part and the external thread head of the present invention. Insert the elastic cylinder so that the screw is in contact with the prepared hole and expand the elastic cylinder, and further rotate the male screw in the tightening direction.

When the male screw is tightened, the elastic body sandwiched between the nut and the screw head expands in the outer peripheral direction and is strongly pressed against the inner periphery of the prepared hole to be in close contact with the elastic body, so that a large pullout resistance is generated.

When the anchor mounting portion is plate-shaped, if one side of the hole of the nut is closed, the airtightness between the front and back sides of the plate will be increased by the synergistic action with the elastic body (rubber, etc.) portion that is in close contact with the inner circumference of the prepared hole. Can be secured.

Further, when the screw is loosened, the expansion of the elastic body part returns to the original state so that the elastic part can be easily attached and detached.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with examples.

[0019]

[Embodiment 1] FIG. 1 shows an embodiment in which a female screw part according to claim 1 of the present invention is used in a blind hole such as concrete. In this example, a nut with a brim is attached to the rubber cylinder, but in short, a nut having an outer diameter similar to that of the cylinder in part has the same function as the nut of the present invention, and its adhesion is also made of an elastic cylinder. Directionality is not limited as long as can be pressed evenly.

Regarding the cross-sectional shape of the elastic tubular portion,
If you make it polygonal according to the shape of the pilot hole, or if you provide a protrusion on the outer circumference of the cylinder to prevent internal rotation in the range that does not interfere with inserting the internal threaded part into the pilot hole, rubber will be fitted in advance to the pilot hole. Preparations such as expanding the part become unnecessary.

The member to be attached is sandwiched between an extension cylindrical portion 5 having a diameter approximately similar to that of the elastic body cylindrical portion and the head of the male screw 3, and the male screw 3 is tightened to expand the elastic body (rubber) portion. When acting as an anchor, by setting the position at which tightening of the male screw 3 is started arbitrarily, the member to be attached can be attached in close contact with the wall surface and fixed at an arbitrary height from the wall surface.

[0022]

[Embodiment 2] FIG. 2 is an example in which the metal fitting of claim 2 is used for a gypsum board or the like. Here, a nut with a flange having a flange diameter similar to that of the rubber cylinder is used, and an airtight cover 7 for securing airtightness is further bonded to one of the nuts.

In the prepared hole formed in the wall, the female screw part of claim 2 (with a cap), the washer 4a, the Western light hanging, etc. 6 (male screw)
Is attached as shown in the drawing, and the male screw is tightened, the nut with flange 1 is pulled to the male screw side, the rubber expansion / contact portion 2a is generated, and the nut 1 comes into close contact with the prepared hole to generate pullout resistance.

The rubber expansion / contact portion 2a is in close contact with the prepared hole to block the flow of gas and liquid through the prepared hole. At this time, by blocking the flow of the gas / liquid through the screw portion with the airtight cover 7, it is possible to ensure the airtightness between the inside and the outside of the wall.

By using a washer 4a having a high rigidity and a large diameter, it is possible to disperse the load applied to the Western light hanging by the entire washer, so that the strength of the gypsum board 8 is low and the metal fitting is held by the prepared hole. You can hang heavy objects even if you have a weak force. For hanging Western lamps, use a screw with a middle brim, etc.
Anything that can hold down the

[0026]

As described above, the anchor according to the present invention (A) can be attached as needed and can be easily removed when it is no longer needed (B) can be fixed at any position. C) The airtightness can be secured, (D) the applicable range (thickness, etc.) of the mating member that can be used is wide, and other excellent effects can be obtained.

[Brief description of drawings]

FIG. 1 is a side view and a sectional view showing a first embodiment according to claim 1 of the present invention.

FIG. 2 is a side view and a sectional view showing a second embodiment according to claim 2 of the present invention.

[Explanation of symbols]

1 Nut with flange (round nut) 2 Rubber part (elastic body) 2a Rubber part (part that expands and contacts the prepared hole, etc.) 3 male screw 4 Washers or attached members 4a washer 5 Extension cylinder 6 Western light hanging, etc. (male screw part with middle brim) 7 Airtight cover 8 gypsum board, etc.

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[Procedure amendment]

[Submission date] July 26, 2002 (2002.7.2)
6)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

[Title of Invention] Post-installed anchor using an elastic body

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 3

[Correction method] Added

[Correction content]

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 4

[Correction method] Added

[Correction content]

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

(C) Some products use an elastic body such as rubber like this product. Although the nut is embedded in the cylindrical part, the outer diameter of the nut is as small as about 1/2 of the outer diameter of the cylinder, and advanced technology is required to position the embedded nut and prevent rubber from flowing. Also, a rubber collar is attached to the side opposite to the nut. In this product, the anchor is fixed by making a stupid hole in a plate with a small thickness and tightening the screw to expand the rubber part at the part that penetrates the plate.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Another object of the present invention is to provide an inexpensive product by eliminating the high-cost technique of embedding a nut or a male screw in an elastic body and using a simple technique of bonding. Other objects of the present invention will become apparent in the following description.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

When the anchor mounting portion is plate-shaped, if one side of the hole of the nut is closed, the airtightness between the front and back sides of the plate will be increased by the synergistic action with the elastic body (rubber, etc.) portion that is in close contact with the inner circumference of the prepared hole. Can be secured. At this time, the larger the tightening margin of the male screw, the larger the expansion of the elastic body can be secured. Therefore, in order to secure the tightening margin and the airtightness, a hollow dome into which the male screw can be inserted is adhered / welded to the end surface of the nut.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

[0026]

As described above, the anchor according to the present invention (A) can be attached as needed and can be easily removed when it is no longer needed (B) can be fixed at any position. C) The airtightness can be secured, (D) the applicable range (thickness, etc.) of the mating member that can be used is wide, and (E) the manufacturing method is simple and can be manufactured at low cost. And so on.

[Procedure amendment]

[Submission date] September 2, 2002 (2002.9.2)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

Further, when the screw is loosened, the expansion of the elastic body portion returns to the original state, so that the anchor can be easily attached and detached. Further, as the male screw and female screw parts to be adhered to the elastic body of the present invention, commercially available products or standard products can be used, so that the manufacturing cost can be reduced. To give an example, a hexagon nut with a flange (JIS B1190), a hexagon cap nut with a flange (a wide distribution that is not in JIS), an SS insert cap nut (manufactured by Dai-ichi Kogyo Co., Ltd., described in the Tokyo Screw Cooperative Association "Screw General Catalog") , A hexagon bolt with a flange (JISB1198), and the like.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Added

[Correction content]

FIG. 3 is an example of a nut with a dome used in claim 2 (manufactured by Dai-ichi Kogyo. SS insert cap nut, published in Tokyo Screw Screw Cooperative “Screw General Catalog”). In claim 2, a hexagon cap nut with a flange having a dome-shaped cap on the opposite side is also acceptable.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Added

[Correction content]

[Figure 3] ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 27, 2002 (2002.11.
27)

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (2)

[Claims] 1. A female threaded component in which a nut having a size and shape substantially equal to the cross section of a cylinder of an elastic body such as rubber is adhered to the end surface of the cylinder of the elastic body. B) A male threaded component with a head that is screwed into the nut having a thickness similar to the inner diameter of the tubular portion of the elastic body. The rubber elastic part is constructed by placing the parts to be attached between the female screw part and the male screw head, inserting the female screw part into the prepared pilot hole slightly larger than the external shape of the female screw part, and tightening the male screw. An anchor that fixes the part by expanding and making it adhere to the prepared hole. 2. An internal thread portion of the nut is closed on one side to prevent liquid and gas from leaking from the thread portion of the nut.
Anchor.