JPH1037931A - Fastening device for aseismatic anchor bolt and fastening method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extremely easily and reliably perform burying operation into concrete such as footing concrete and a concrete structure by preventing lateral swinging of a shaft part particularly when an earthquake occurs, and reliably preventing the occurrence of shear fracture in a screw part even if lateral directional shearing force acts on the screw part. SOLUTION: This fastening device for an aseismatic anchor bolt is constituted so that the burying side end part side of a shaft part 2 of an aseismatic anchor bolt 1 is buried in concrete A such as footing concrete and a concrete structure, and a fastening member 4 is properly screwed in a screw part 3 of a fastening side end part of the shaft part 2 of this aseismatic anchor bolt 1, and a support member C of various equipment, apparatuses, tanks B or the like is fastened. In this case, a shearing reinforcing nut 5 to increase strength of the screw part 3 to shear fracture is installed on the lower side of the fastening member 4 of the screw part 3 of the aseismatic anchor bolt 1 so that its lower part is buried in the concrete A such as the footing concrete and the concrete structure and its upper part is fitted in a support hole D of the support member C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic anchor bolt fastening device and a fastening method suitable for installing various facilities, equipment, water tanks and the like mainly on basic concrete and concrete structures. .

[0002]

2. Description of the Related Art Conventionally, various types of anchor bolts of this type have been created, but most of them are provided with hook-shaped retaining pieces at the end of the shaft portion on the embedding side, and the shaft portion has A screw portion is provided at the tightening side end, and a tightening nut is screwed into the screw portion at the tightening side end of this shaft portion via a washer to support various facilities, equipment, support members such as water tanks. I was trying to tighten it.

[0003]

However, in the conventional anchor bolt, a tightening nut is provided on a screw portion on a tightening side end of a shaft so that supporting members such as various facilities, equipment, and a water tank are not pulled out. Since it is simply tightened by screwing in through the washer, consideration is given to the axial direction (tightening direction) of the anchor bolt, but no consideration is given to the lateral direction (shear direction) of the anchor bolt. The strength of the thread portion against shear failure is weak. In particular, when an earthquake or the like occurs, lateral shaking occurs in the shaft portion, and a lateral shear force acts on the thread portion, so that the thread portion may be sheared and fractured.

Accordingly, the present invention has been made in consideration of the above-described problems, and has increased the strength of a screw portion against shear failure, thereby reducing the lateral deflection of a shaft portion particularly during an earthquake or the like. To prevent the screw portion from being sheared and broken even when a lateral shear force acts on the screw portion, and to install the seismic anchor bolt in concrete such as foundation concrete or concrete structure. An object of the present invention is to provide a seismic anchor bolt tightening device and a tightening method capable of extremely easily and reliably performing an embedding operation.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a fastening device for an earthquake-resistant anchor bolt according to the present invention is provided in a concrete such as a foundation concrete or a concrete structure. Embed the embedded side end of the part, and screw the appropriate fastening member into the screw part of the fastening side end of the shaft part of this seismic anchor bolt to support various equipment, equipment, water tanks and other supporting members. In the fastening device for an earthquake-resistant anchor bolt which is to be tightened, a shear reinforcing nut for increasing the strength of the screw portion against shear failure is provided below a fastening member of a screw portion of the earthquake-resistant anchor bolt, and a lower portion thereof is provided with a It is embedded in concrete such as basic concrete or a concrete structure, and is mounted so that its upper part is fitted into the support hole of the support member.

Further, in order to achieve the above-mentioned object, the method of fastening an earthquake-resistant anchor bolt according to the present invention provides an outer peripheral surface at a lower portion of a screw portion at a fastening end of a shaft portion of the earthquake-resistant anchor bolt. In order to install various facilities, equipment, water tanks, etc., a shear reinforcement nut with a mark tape indicating the finishing position of concrete such as basic concrete or concrete structure is installed on the upper part of the anchor, and the shaft of this anchor bolt for earthquake resistance is embedded. After embedding the side end side in various types of equipment, equipment, concrete such as a foundation concrete or a concrete structure to install a water tank, etc., so that the mark tape of the shear reinforcing nut matches the finishing position of the concrete, A support hole of a support member such as various facilities, equipment, and a water tank is fitted into an upper portion of the shear reinforcing nut of the seismic anchor bolt, and a shaft of the seismic anchor bolt is provided. Crowded twisting appropriate fastening member to the threaded portion upper tightening end various types of equipment, instruments, so that clamp the support member of the aquarium or the like.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, as an embodiment of the present invention, a state in which various facilities, equipment, a water tank and the like are installed on a basic concrete or a concrete structure will be described with reference to the drawings.

As shown in FIGS. 1 to 3, a fastening device for an anchor bolt for seismic anchor according to the present invention is such that a shaft part 2 of the anchor bolt for seismic anchor 1 is embedded in a concrete A such as a foundation concrete or a concrete structure. The side end portion is embedded, and the screw portion 3 at the tightening side end of the shaft portion 2 of the seismic anchor bolt 1 is inserted.
In the tightening device for the seismic anchor bolt, the tightening member 4 is appropriately screwed in to tighten the support member C such as various facilities, equipment, and the water tank B. A shear reinforcing nut 5 for increasing the strength of the screw portion 3 against shear failure is embedded below the member 4, a lower portion of the nut 5 is embedded in the concrete A such as the foundation concrete or the concrete structure, and an upper portion thereof is the support member. It is attached so as to be fitted into the support hole D of C.

More specifically, the seismic anchor bolt 1 is provided with a hook-shaped retaining piece 7 at the embedded end of the shaft portion 2 having a diameter of about 16 mm, and a screw at the tightening end of the shaft portion 2. The portion 3 is formed.

The fastening member 4 is preferably a fastening nut 9 via a round washer 8 or a spring washer on the lower side, but a flanged fastening nut or a support hole D of the support member C is preferably used. Only a tightening nut having a diameter larger than the diameter may be used.

The shear reinforcing nut 5 is formed so that a female screw is provided on the inner peripheral surface of the cylindrical body 10 having a diameter of about 30 mm and a length of about 25 mm. It should be noted that the shearing reinforcement nut 5 is illustrated in such a manner that a female screw on the inner peripheral surface of the cylindrical body 10 is screwed and attached to the lower side of the tightening member 4 of the screw portion 3 of the seismic anchor bolt 1. Without limiting, the screw portion 3 is not provided below the fastening member 4 of the seismic anchor bolt 1, and the female screw is not provided on the inner peripheral surface of the tubular body 10, and the lower side of the fastening member 4 of the seismic anchor bolt 1 is not provided. To shear nut 5
The cylindrical body 10 may be fitted and adhered with an adhesive, or may be fitted simply by fitting.

A comparison of the diameters of the fastening parts of the support member C of the present invention with those of the conventional various facilities, equipment, water tanks B, etc. shows that the conventional ordinary anchor bolt has a diameter of 16 mm and a cross-sectional area of 200 mm ^2. On the other hand, in the present invention, since the sum of the seismic anchor bolt 1 and the shear reinforcing nut 5 is used, the diameter is 30 mm, the cross-sectional area is 707 mm ² , and the cross-sectional area is approximately 3.5 times the conventional one. Therefore, while the conventional ordinary anchor bolt has a diameter of 16 mm and a shearing force of 1.81 tons, the present invention is the sum of the seismic anchor bolt 1 and the shear reinforcing nut 5, and has a diameter of 30 mm and a shearing force of 5 mm. Becomes 6.36 tons,
Since the shearing force is approximately 3.5 times that of the conventional anchor bolt, the strength of the thread portion 3 against shear failure can be increased by approximately 3.5 times compared with the conventional ordinary anchor bolt.

On the other hand, as a method of fastening the seismic anchor bolt of the present invention, first, various facilities are provided below the screw part 3 on the fastening side end of the shaft part 2 of the seismic anchor bolt 1 and on the upper part of the outer peripheral surface. In order to install the equipment, the water tank B, etc., the shear reinforcing nut 5 to which the mark tape 6 indicating the finishing position of the concrete A such as the foundation concrete or the concrete structure is attached. Next, the embedded end of the shaft portion 2 of the seismic anchor bolt 1 is inserted into concrete A such as a foundation concrete or a concrete structure in order to install various facilities, equipment, a water tank B, etc. 5 is embedded so that the mark tape 6 matches the finishing position of the concrete A. After that, the shear reinforcement nut 5 of this seismic anchor bolt 1
A support hole D of a support member C such as various facilities, equipment, and a water tank B is fitted into an upper part of the shaft part 2 of the seismic anchor bolt 1.
The fastening member 4 is appropriately screwed into the upper part of the threaded portion 3 at the fastening side end to tighten the supporting members C such as various facilities, equipment, and the water tank B.

[0014]

As described above, the fastening device for an earthquake-resistant anchor bolt according to the present invention is provided in a concrete A such as a foundation concrete or a concrete structure.
Of the shaft portion 2 of the seismic anchor bolt 1 is screwed into the screw portion 3 at the tightening side end of the shaft portion 2 of the seismic anchor bolt 1. In a fastening device for an earthquake-resistant anchor bolt adapted to fasten a support member C such as a water tank B, a screw member 3 of the earthquake-resistant anchor bolt 1 is provided below a fastening member 4 against a shear failure of the screw portion 3. Since the shear reinforcing nut 5 for increasing the strength is mounted so that its lower part is embedded in the concrete A such as the foundation concrete or concrete structure, and its upper part is fitted in the support hole D of the support member C. The diameter of the tightening portion of the supporting member C such as various facilities, equipment, and the water tank B becomes the sum of the seismic anchor bolt 1 and the shear reinforcing nut 5, and the strength of the screw portion 3 against shear failure can be increased. Because of the earthquake Etc, since it is possible to prevent the runout side of the shank 2 without shearing forces in the transverse direction to the screw portion 3 acts can screw portion 3 is reliably prevented from being shear failure.

Further, the method of fastening the seismic anchor bolt of the present invention includes the steps of mounting various equipment, equipment, and the like on the lower part of the screw part 3 on the fastening side end of the shaft part 2 of the seismic anchor bolt 1 and on the upper part of the outer peripheral surface.
In order to install the water tank B and the like, a shear reinforcing nut 5 to which a mark tape 6 indicating a finishing position of the concrete A such as a basic concrete or a concrete structure is attached is attached, and an embedded end of the shaft portion 2 of the seismic anchor bolt 1 is mounted. The part side is embedded in concrete A such as a foundation concrete or a concrete structure so as to install various facilities, equipment, a water tank B, etc. so that the mark tape 6 of the shear reinforcing nut 5 matches the finishing position of the concrete A. After that, on the upper part of the shear reinforcement nut 5 of the seismic anchor bolt 1, various facilities, equipment,
A support hole D of a support member C such as a water tank B is fitted, and a tightening member 4 is appropriately screwed into a screw portion 3 above a tightening side end of the shaft portion 2 of the seismic anchor bolt 1 to provide various facilities. Equipment, water tank B
Since the supporting member C is tightened, the embedded end of the shaft portion 2 of the seismic anchor bolt 1 is connected to a concrete such as a foundation concrete or a concrete structure in order to install various facilities, equipment, a water tank B and the like. When embedding in the concrete A, the mark tape 6 on the outer peripheral surface of the shear reinforcing nut 5 can be adjusted to the finishing position of the concrete A, so that the seismic anchor bolts into the concrete A such as a foundation concrete or a concrete structure. 1 can be extremely easily and reliably performed.

[Brief description of the drawings]

FIG. 1 is an exploded front view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a principal part showing a state where various facilities, equipment, a water tank, and the like are installed on basic concrete, a concrete structure, and the like.

FIG. 3 is an overall front view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Seismic anchor bolt 2 Shaft part 3 Screw part 4 Tightening member 5 Shear reinforcement nut 6 Marking tape 7 Retaining piece 8 Round washer 9 Tightening nut 10 Cylindrical A Concrete B Various facilities, equipment, water tank C Supporting member D Supporting hole

Claims (2)

[Claims] 1. An embedding end portion of a shaft portion of an earthquake-resistant anchor bolt is embedded in concrete such as a foundation concrete or a concrete structure, and a shaft-side end portion of the shaft portion of the seismic anchor bolt is tightened. In a fastening device for an earthquake-resistant anchor bolt in which a fastening member is appropriately screwed into a screw portion to fasten a support member of various facilities, equipment, water tanks, etc., a lower side of the fastening member of the screw portion of the earthquake-resistant anchor bolt. In addition, a shear reinforcing nut that increases the strength of the screw portion against shear failure,
A fastening device for seismic anchor bolts, wherein a lower part thereof is embedded in concrete such as the foundation concrete or concrete structure, and an upper part thereof is mounted so as to be fitted in a support hole of the support member. . 2. Finishing of concrete such as basic concrete or concrete structure in order to install various facilities, equipment, water tanks, etc. below the screw part on the tightening side end of the shaft part of the seismic anchor bolt, and above the outer peripheral surface. Attach a shear reinforcing nut with a mark tape indicating the position, and embed the end of the shaft of the seismic anchor bolt into the embedded side of the base concrete or concrete structure to install various facilities, equipment, water tanks, etc. After embedding the marking tape of the shear reinforcing nut in the concrete so as to match the finishing position of the concrete, supporting the support members such as various facilities, equipment, and a water tank above the shear reinforcing nut of the seismic anchor bolt. A hole is fitted, and a tightening member is appropriately screwed into an upper portion of a screw portion on a tightening side end of the shaft portion of the seismic anchor bolt to support various facilities, equipment, water tanks and the like. A method for fastening seismic anchor bolts, comprising: