JPH10231824A - Nut with cutting washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nut with cutting washer whereby a basis can be easily and surely fixed onto a foundation with no preliminary buckling required to be applied and without forming a protruded part on a basis upper surface. SOLUTION: This nut with cutting washer is screwed to a tip end of an anchor bolt buried in a foundation in a wooden building, the nut with cutting washer fixing a basis onto the foundation is provided with a bowl-shaped washer part 11 and a nut part 12 formed in an internal center of the washer part 11, in the washer part 11, an opening part 11a successively providing an internal/ external space thereof is provided, in an edge part of the opening part 11a, a blade part 11b cutting off an upper surface of the basis is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a nut with a cutting washer,
More specifically, the present invention relates to a nut with a cutting washer that can easily and reliably fix a base on a foundation without having to perform excavation in advance and without forming a protruding portion on the upper surface of the base.

[0002]

2. Description of the Related Art Conventionally, to fix a foundation on a concrete foundation in a wooden building, as shown in FIG. 6, an anchor bolt 2a is buried in the foundation 2, and the foundation 3 is passed through the anchor bolt 2a. Generally, the base 3 is fixed by screwing a nut 10 to the tip of the anchor bolt 2a protruding from the upper surface of the base 3. However, in highly airtight housing, which has recently attracted attention,
The heat insulating material 4 needs to be adhered to the base 3, but the nut 10 hinders the close contact of the heat insulating material 4 to the upper surface of the base 3. For this reason, as shown in FIG. 6, a concave portion is formed in a portion of the heat insulating material 4 corresponding to the nut 10 or the like. This was a burden on the work and was not always desirable. Regarding other members such as joists other than the heat insulating material 4 disposed on the base 3,
The same processing was required, which was a burden on construction work.

On the other hand, as means for bringing the heat insulating material 4 into close contact with the base 3, a means as shown in FIG. 7 is also used. In the means shown in FIG. 7, a counterbore 3a is formed on the upper surface of the base 3, and the anchor bolt 2
The tip of a and the nut 10 are accommodated in the counterbore 3a so that a portion protruding from the upper surface of the base 3 is not generated. By doing so, the heat insulating material 4
Can be brought into close contact with the upper surface of the base 3, but the process of processing the seating moat 3a occurs, and the problem of burden on the construction work has not been solved.

In order to solve such a problem, a special washer as disclosed in Japanese Utility Model Publication No. 7-30976 and Japanese Utility Model Publication No. 8-10701 has been developed. FIG. 8 shows a nut 100 with a washer improved so that the above-mentioned special washer can also be used as a nut. Nut with washer 10
Reference numeral 0 denotes a bowl-shaped washer 11 and a nut 12 formed at the center of the washer 11. A ridge 11 d for cutting the upper surface of the base 3 is formed on the outer surface of the washer 11. Is formed. When the nut portion 12 is screwed into the tip of the anchor bolt by an impact wrench or the like using the nut portion 12, the upper surface of the base 3 is cut off by the ridge 11d and embedded in the upper surface of the base 3 to be embedded therein. It is intended to finish the upper surface flush.

[Problems to be solved by the invention]

However, according to the nut 100 shown in FIG. 8, when the nut 100 is screwed into the tip of the anchor bolt 2a, the nut 3 is screwed while cutting off the upper surface of the base 3, so that no extra step is required. However, as shown in FIG. 9, shavings formed by the ridges 11 d easily accumulate between the washer 11 and the base 3,
In some cases, a slight step was generated between the upper surface of the base 3 and the upper surface of the nut 100. For this reason,
When a heat insulating material is provided on the base 3, there is a possibility that a small gap may be generated and a problem that sufficient airtightness cannot be obtained may occur. In addition, when the joists other than the heat insulating material are installed, there is a possibility that the above-mentioned steps may hinder the operation.

Accordingly, an object of the present invention is to provide a nut with a cutting washer that can easily and reliably fix a base on a foundation without having to perform excavation in advance and without forming a protruding portion on the base. To provide.

[0007]

The invention according to claim 1 is a nut with a cutting washer screwed to a tip of an anchor bolt buried in a foundation in a wooden building, and fixing a base on the foundation. A bowl-shaped washer portion, and a nut portion formed at the center of the washer portion. An opening portion is provided in the washer portion to connect the inner space and the outer space of the washer portion to each other. The above object has been attained by providing a nut with a cutting washer, characterized in that a blade portion for shaving the upper surface of the base is formed at an edge portion of the nut.

[0008] The invention described in claim 2 is the first invention.
The present invention provides a nut with a cutting washer, wherein a plurality of the openings and the blades are provided, and the blades are formed in a spiral shape.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a nut with a cutting washer of the present invention will be described below with reference to the drawings. 1 and 2
1 shows a first embodiment of a nut with a cutting washer of the present invention, FIG. 1 (a) is a plan view, FIG. 1 (b) is a perspective view, and FIG. 2 is a cross-sectional view including a peripheral portion in a use state. .

The nut 1 with a cutting washer of the present embodiment is shown in FIG.
And a foundation 2 in a wooden building as shown in FIG.
The base 3 is fixed on the foundation 2 by screwing to the tip of an anchor bolt 2a embedded in the base.
And a nut part 12 formed at the center of the inside of the washer part 11.
An opening 11a for connecting the inner space and the outer space of the washer 11 is provided in the washer 11, and a blade 11b for shaving the upper surface of the base 3 is formed at an edge of the opening 11a. It is. Further, the nut 1 with a cutting washer of the present embodiment is provided with a plurality of the openings 11a and the blades 11b, and the blades 11b are formed in a spiral shape and arranged.

The nut 1 with a cutting washer of this embodiment will be described in more detail. The nut with cutting washer 1 includes the washer portion 11 and the nut portion 12 as described above. The washer 11 has a bowl-shaped outer shape, and the nut 12 is formed at the center thereof. The four openings 11 a are formed in a spiral shape from the center of the washer 11, that is, from the nut 12. In the case of the present embodiment, the opening 11a
Is formed in a cut shape from the nut portion 12 to the upper edge of the washer portion 11.

The edge of the opening 11a, more specifically, the nut 1 with the cutting washer is connected to the anchor bolt 2a.
The blades 11b are formed on the edges on the side that bites into the upper surface of the base 3 when screwed into the tip of the base 3. The blade 11b is also formed in a spiral like the opening 11a. The blade 11b is mounted on the base 3
Is formed so sharp that the upper surface of the can be cut off.

The upper surface of the nut portion 12 formed at the center of the washer portion 11 is located below the upper end of the washer portion 11 or is flush with the upper end of the washer portion 11. It is formed as follows. In the case of this embodiment,
The nut portion 12 is formed by welding a normal nut to the bowl-shaped washer portion 11. A screw hole 12a is formed at the center of the nut portion 12, and the screw hole 12a is screwed to the tip of the anchor bolt 2a. The screw hole 12a is formed to penetrate from the lower surface of the nut with cutting washer 1 to the upper surface of the nut portion 12.

When using the nut with cutting washer 1, the anchor bolt 2 a is buried in the foundation 2, and the anchor bolt 2 a is passed through a through hole formed at a predetermined position on the base 3. . At this time, the tip of the anchor bolt 2a is made to reach a position almost reaching the upper surface of the base 3, but does not protrude from the upper surface.

Then, the nut 12 is fitted into the box wrench by an impact wrench or the like with a box wrench attached thereto, and the nut 1 with a cutting washer is rotated to allow the tip to be seen through the above-described through hole. The nut 1 with the cutting washer is screwed into the anchor bolt 2a by screwing the screw hole 12a into the anchor bolt 2a. Of course, only a part of the lower end of the screw hole 12a is screwed into the anchor bolt 2a whose tip is seen through the above-mentioned through hole, and then the nut 12 is fitted into a box wrench to attach the cutting washer. It goes without saying that the nut 1 may be rotated.

As the screwing between the nut with cutting washer 1 and the anchor bolt 2a proceeds, the blade 11b comes into contact with the upper surface of the base 3. The upper surface of the base 3 is shaved by the blade 11b, and the washer 11 of the nut 1 with cutting washer is embedded in the upper surface of the base 3. The shavings shaved by the blade 11b are taken into the inside of the washer 11 through the opening 11a,
Is discharged from above. As a result, the washer 11 is securely embedded in the upper surface of the base 3,
The upper surface of the base 3 is a flat surface without any protruding portion.

According to the nut 1 with a cutting washer of the present embodiment, the washer 11 is embedded in the base 3 by the blade 11b. Since no protrusion is formed on the upper surface of the base 3, no gap is formed between the heat insulating material 4 and the joist on the upper surface of the base 3, and high airtightness and high heat insulation can be performed. No extra work is required, and there is no risk of obstructing construction work. Further, since the washer 11 is merely buried in the upper surface of the base 3 without forming something like digging, the strength of the base 3 is not reduced.

According to the nut 1 with a cutting washer of the present embodiment, in addition to the above-described effects, the blade 1
The cutting shavings scraped off by the opening 1b
The cutting chips are accumulated between the washer 11 and the base 3 through the washer 11 through the inside of the washer 11, so that the upper end of the nut 1 with the cutting washer and the upper surface of the base 3 There is also an effect that there is no possibility that there is a step between them, and there is no possibility that it will be an obstacle in construction work.

Further, since the blade portion 11b is formed in a spiral shape, the blade portion 11b hits the upper surface of the base 3 obliquely, so that the blade portion 11b is hardly caught and the like. The cutting of the upper surface of the base 3 by the portion 11b is favorably performed. In addition, the opening 11
a and a plurality of the blades 11b are provided, and the blades 11b are evenly arranged so that the cutting of the upper surface of the base 3 by the blades 11b is evenly performed, and the nut 1 with the cutting washer is tilted and attached to the base 3. It is less likely that a bite will occur.

Next, a second embodiment of the nut with a cutting washer of the present invention will be described with reference to the drawings. 3 to 5 show a nut with a cutting washer of this embodiment. FIG. 3 is a perspective view, FIG. 4 (a) is a plan view, FIG. 4 (b) is a bottom view, and FIG. FIG. 2 is a sectional view taken along line AA in FIG.

The nut 1 'with a cutting washer of the present embodiment.
As shown in FIGS. 3 to 5, the nut 1 differs from the above-described nut 1 with a cutting washer in the manner in which the opening 11 a and the blade 11 b are formed, and in the presence or absence of the cylindrical portion 11 c. Is configured in exactly the same manner as the nut 1 with a cutting washer. Therefore, the same components as those of the above-mentioned nut with cutting washer 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. Only the portions different from the above-mentioned nut with cutting washer 1 will be described in detail below.

In the present embodiment, the bowl-shaped washer 11
The opening 11a and the blade 11b are formed by providing three hook-shaped cuts in the hole and pushing the cut portion outward. The blade portion 11b is formed by an edge of a portion pushed outward, and is formed and arranged in a spiral shape as shown in FIG.
In the present embodiment, the cylindrical portion 11c is provided continuously at the center on the lower surface side of the washer portion 11. A thread groove which is continuous with the thread groove inside the screw hole 12a is formed inside the cylindrical portion 11c, so that an effective distance for screwing when screwing to the anchor bolt is long, and the screwing is more reliably performed. I can do it.

The nut with cutting washer 1 'of this embodiment is the same as the nut 1 with cutting washer shown in FIGS.
Has exactly the same effect.

The nut with cutting washer of the present invention is not limited to the above embodiment. For example, in the nuts 1 and 1 ′ with the cutting washer of the above-described embodiment, the bowl-shaped washer portion 11 has a form in which the outer surface is formed in a spherical shape, but the outer surface is formed in a conical shape. It may have a bowl-like form formed on the surface. The screw hole 12a is formed to penetrate from the upper surface to the lower surface of the nut with cutting washer 1 and 1 ', but is directed downward so as to be screwed to the tip of the anchor bolt 2a. If it is formed, it does not necessarily need to be formed so as to penetrate, and may be formed in a form like a cap nut. Other points can be appropriately changed without departing from the spirit of the present invention.

[0025]

According to the nut with a washer of the present invention, the foundation can be easily and reliably fixed on the foundation without the need for excavating in advance and without forming a projection on the upper surface of the foundation. .

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a nut with a cutting washer of the present invention, wherein (a) is a plan view and (b) is a perspective view.

FIG. 2 is a perspective view of a nut with a cutting washer according to a first embodiment of the present invention, including a peripheral portion showing a use state of the first embodiment.

FIG. 3 is a perspective view of a nut with a cutting washer according to a second embodiment of the present invention.

FIG. 4 shows a second embodiment of a nut with a cutting washer of the present invention, wherein (a) is a plan view and (b) is a bottom view.

FIG. 5 is a sectional view taken along line AA in FIG.

FIG. 6 is a cross-sectional view showing a conventional base fixing structure (first example).

7A and 7B show a conventional base fixing structure (second example), wherein FIG. 7A is an exploded perspective view, and FIG. 7B is a perspective view of a fixed state.

8A and 8B show a conventional nut with a washer, wherein FIG. 8A is a perspective view and FIG. 8B is a bottom view.

FIG. 9 is a perspective view when the nut with washer shown in FIG. 9 is used.

[Explanation of symbols]

 1, 1 'Nut with cutting washer 11 Washer 11a Opening 11b Blade 12 Nut 12a Screw hole 2 Foundation 2a Anchor bolt 3 Base

Claims (2)

[Claims] 1. A nut with a cutting washer screwed to a tip of an anchor bolt buried in a foundation of a wooden building and fixing a base on the foundation, wherein a bowl-shaped washer part and an inside of the washer part are provided. A nut portion formed in the center, an opening portion for connecting the inner space and the outer space of the washer portion is provided in the washer portion, and a blade portion for shaving the upper surface of the base is formed at an edge of the opening portion. A nut with a cutting washer, characterized in that 2. The nut with a washer according to claim 1, wherein a plurality of the openings and the blades are provided, and the blades are formed in a spiral shape.