JPH08197448A - Work execution tool for anchor bolt - Google Patents

Abstract

PURPOSE: To fix an anchor bolt to a wall easily by constituting a construction tool in such a way that grip piece parts are gripped after inserting an embedded nut and a collar into a drilled hole so as to press the collar into the drilled hole by a pressing piece and to pull a bolt head to the outside of the drilled hole by a tension piece part. CONSTITUTION: The embedded nut 4 and collar 5 of an anchor bolt 1 are inserted into a drilled hole 7 formed in a concrete wall W. In this state, the respective bolt engaging grooves of the pressing piece part 11b and tension piece part 12b of a construction tool 10 are engaged with a bolt 2, and the pressing piece part 11b is brought into contact with the wall W, while the tension piece part 12b is brought into contact with the inside of the head 2a of the bolt 2. Grip piece parts 11a, 12a are then gripped to apply the force of pushing the collar 5 into the bolt hole 7 side, to the pressing piece part 11b and to apply the force of pulling the head 2a of the bolt 2 to the outside, to the tension piece part 12b. A diameter enlarged piece part 5c is then enlarged in diameter along a conical part 4b and pressure-fixed into the drilled hole 7 to fix the embedded nut 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction tool for anchoring an anchor bolt on a wall surface.

[0002]

2. Description of the Related Art Conventionally, there is an anchor bolt as shown in FIG. 6, and this anchor bolt 1 includes a bolt 2 having a head portion 2a whose diameter is enlarged at its tip, and this bolt 2
A rubber cylinder 3 that is fitted to the outside, a shaft portion 4a that has an internal thread 4c with which the bolt 2 is screwed, and a buried nut 4 that includes a conical portion 4b whose diameter increases from the shaft portion 4a toward the tip side, A plurality of diameter-increasing piece portions 5c divided by slits 5b, 5b, 5b so that the diameter can be increased from the base portion 5a which is externally fitted to the outside of the embedded nut 4 and through which the bolt 2 can be inserted to the tip side.
The collar 5 is made up of a collar 5 and the collar 5 is externally fitted to the embedded nut 4, and the bolt 2 is screwed into the embedded nut 4, as shown in FIG. The embedded nut 4 and the collar 5 are inserted into the drilled hole 7 formed, and the head 2a of the bolt 2 is inserted through the drilled hole
In this state, the rubber cylinder 3 is gripped with the left hand, the head 2a of the bolt 2 is gripped with the right hand, and the head 2a is strongly pulled outward, so that the bolt 2 Is pulled outward, the embedded nut 4 is press-fitted into the expanding piece 5c of the collar 5, and the expanding piece 5c is expanded.
Expands outward along the conical portion 4b, whereby the expanding piece 5c of the collar 5 is firmly pressed against the inner wall of the drill hole 7, and the embedded nut 4 and collar 5 are fixed in the drill hole 7. In this state, the bolt 2 is pulled out to the outside through a screw, and the bolt 2 is engaged with a mounting hole of a bathtub or other washbasin, and the bolt 2 is screwed into the embedded nut 4 again. By doing so, the bolt 2 can be tightened to firmly attach a washbasin, a bathtub or the like to the concrete wall W.

As described above, conventionally, when the anchor bolt 1 is fixedly mounted in the drill hole 7 of the concrete wall W, the worker pulls the heads 2a of the bolts 2 one by one to the outside to form the embedded nuts 4 therein. Since the collar 5 is fixed in the drill hole 7, a considerably large force is required to pull the bolt 2, and when the number of anchor bolts is large, it requires an extremely large amount of work, and construction of the concrete wall W etc. If the condition is bad, there is a possibility of injury and the construction work is difficult.

[0004]

SUMMARY OF THE INVENTION In view of the above problems of the prior art, the object of the present invention is not to provide a construction tool capable of easily fixing an anchor bolt in a drill hole without requiring a difference in force. The gist is that a bolt having a head portion, an embedded nut having a female screw inside which the bolt is screwed and having a conical portion whose diameter is expanded toward the tip side, and the bolt is screwed and integrated with the embedded nut. A drill formed on a concrete wall with an anchor bolt that is externally fitted to the embedded nut in this state and the conical portion of the embedded nut is press-fitted by pulling the bolt A construction tool fixed in a hole, wherein the construction tool grips a gripping piece in a state where the embedded nut and collar are inserted into the drill hole and the head of the bolt is projected to the outside of the drill hole. Especially Ri, a pressing piece for pressing the collar into the drill hole is to the bolt head in the reverse is configured to include a tensile piece pulling outwardly of the drill hole.

[0005]

[Operation] After inserting the embedded nut and collar into the drill hole on the wall surface, insert the pressing piece and the pulling piece from the outside with respect to the bolt protruding outward, and press the gripping piece to press it. One part pushes the collar toward the drill hole side, and the tensioning piece pulls the bolt outside the drill hole, so that the cone part of the embedded nut is pressed into the collar as the bolt moves to the outside. As a result, the expanded diameter piece of the collar is expanded outward along the conical portion, and the expanded diameter piece is firmly pressed and fixed to the inner peripheral surface of the drill hole.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional configuration diagram showing a state in which an anchor bolt 1 is fixed in a drill hole 7 formed in a concrete wall W by a construction tool 10 of this example, and FIG. 2 is a schematic perspective configuration showing an example of the construction tool. It is a figure. In the figure, a construction tool 10 is configured by connecting a first member 11 and a second member 12 with a connecting pin 13, and a gripping piece part that can be grasped by a hand is provided at a tip of the first member 11. 11a is formed, and a pressing piece portion 11b having a bolt engaging groove 11c with which the bolt 2 can be engaged is formed on the other end side, and the second member 12 is A grip piece portion 12a facing the grip piece portion 11a is formed at the tip, and a pulling piece portion 12b facing the pressing piece portion 11b is formed on the other end side. 12b
A bolt engaging groove 12c capable of engaging the bolt 2 is formed in the. Further, between the pulling piece portion 12b and the gripping piece portion 12a, there is a curved arm portion 12d curved in a dogleg shape.

Therefore, in such a construction tool 10, when the pair of gripping pieces 11a and 12a are gripped and tightened from the outside by hand, the pressing piece 11b and the pulling piece 12b on the other end side move in opposite directions. It will be expanded.

As shown in FIG. 1, a buried nut 4 and a collar 5 of an anchor bolt 1 are inserted into a drill hole 7 previously formed in a concrete wall W so that the bolt 2 is projected outward. In this state, the bolt engaging grooves 11c, 1
2c is engaged to press the pressing piece 11b into the concrete wall W.
And the pulling piece 12b is brought into contact with the inside of the head 2a of the bolt 2, and the gripping pieces 11a and 12a are applied with a gripping force from the outside in this state, the pressing piece 11b bolts the collar 5 to the bolt 5. The pulling piece portion 12b exerts an action force of pushing the head portion 2a of the bolt 2 to the outside, whereby the bolt 2 is pulled to the outside and accordingly. Since the embedded nut 4 is also pulled outward, at this time, the conical portion 4b of the embedded nut 4 becomes the collar 5
The diametrical expansion piece 5c is press-fitted inside the diametrical expansion piece 5c.
Is gradually expanded outward along the conical portion 4b, and eventually the inner peripheral surface of the drill hole 7 is firmly covered with the enlarged diameter piece 5c.
The collar 5 and the embedding nut 4 are firmly fixed in the drill hole 7 by pressing through the hole.

In this state, the construction tool 10 is removed, and the screw of the bolt 2 is loosened from the embedded nut 4 and removed.
By inserting the bolt 2 into the mounting hole of a bathtub or the like and screwing the bolt 2 into the embedded nut 4 again, it is possible to firmly attach the bathtub, washbasin, etc. to the concrete wall W via the anchor bolt 1. Becomes

In this embodiment, the anchor bolt 1 can be easily fixed in the drill hole 7 by operating the construction tool 10 with a light force with one hand.
It will be extremely easy to fix.

The construction tool shown in FIG. 2 is an example, and as shown in FIG. 3 showing a main part of the first member 11, the first member 1
A disk-shaped pressing flange portion 11d may be integrally formed on the outer periphery of the grip piece portion 11a of No. 1 so as to project outward. By forming the pressing flange portion 11d in this manner, the pressing flange portion 11d can be formed. The pressing piece 11b can be easily pressed against the concrete wall W side to operate the construction tool 10, and the operability of the construction tool is improved.

Further, as shown in FIG. 4, the grip piece 11
The hand insertion portion 11e is integrally formed in the shape of a U on the outside of a, and the hand is inserted into the hand insertion portion 11e so that the pressing piece portion 11b can be favorably placed on the concrete wall W side when the construction tool 10 is operated. It can be pressed.

Further, as shown in a perspective view in FIG. 5, extension pieces 11f and 12e are formed in a bent shape at the upper ends of the grip pieces 11a and 12a of the construction tool 10, and the extension pieces 11f and 12e are formed. The pieces 11f and 12e are the pressing pieces 11b.
If it is extended in a direction parallel to the pulling piece portion 12b and the pulling piece portion 12b, the pressing piece portion 11 is provided via the extending piece portions 11f and 12e.
b, the extending piece portions 11f and 12e can be gripped by hand while pressing the pulling piece portion 12b against the concrete wall W side, and the operability of the construction tool 10 becomes better.

[0014]

According to the present invention, a bolt having a head portion, an embedded nut having an internal thread to which the bolt is screwed and having a conical portion whose diameter is expanded toward the tip side, and the bolt is attached to the embedded nut. An anchor bolt composed of a collar having a diameter-increasing piece portion in which the conical portion of the embedded nut is press-fitted by externally fitting the embedded nut in a screw-integrated state and pulling the bolt to expand the diameter outward, A construction tool fixed in a drill hole formed in a concrete wall, the construction tool being in a state in which the embedded nut and collar are inserted into the drill hole and the head of the bolt is projected to the outside of the drill hole. , A construction tool comprising a pressing piece for pressing the collar into the drill hole by gripping the gripping piece and a pulling piece for pulling the head of the bolt to the outside of the drill hole on the contrary. Through Pull the bolt to the outside in the stomach force,
The cone part of the embedded nut can be press-fitted into the expanding part of the collar to firmly press the expanding part of the collar into the drill hole to fix it, and the fixing work of the anchor bolt in the drill hole can be done with a light force. The workability is good, workability is good, and work can be performed quickly with one hand.

[Brief description of drawings]

FIG. 1 is a work state diagram showing a state in which an anchor bolt is fixedly installed in a drill hole on a wall surface with a construction tool.

FIG. 2 is a schematic perspective view showing an example of a construction tool.

FIG. 3 is a perspective view of a main part in which a pressing flange portion is integrally formed on a grip piece portion of a construction tool.

FIG. 4 is a perspective view of a main part in which a hand insertion portion into which a hand can be inserted is integrally formed on a grip piece portion of a construction tool.

FIG. 5 is a perspective configuration diagram showing a modification example of the construction tool.

FIG. 6 is an exploded perspective view of an anchor bolt.

FIG. 7 is a cross-sectional configuration diagram showing a state where an anchor bolt is inserted into a drill hole, showing a conventional fixing method.

8 is a cross-sectional view of a conventional work process in which a bolt is pulled and fixed in a drill hole from the state of FIG. 7.

[Explanation of symbols]

 1 Anchor Bolt 2 Bolt 2a Head 4 Embedded Nut 4a Shaft 4b Cone 4c Female Thread 5 Collar 5a Base 5b Slit 5c Expanding Piece 7 Drilling Hole 10 Construction Tool 11 First Member 11a Grip Piece 11c Pressing Piece 11c Bolt engaging groove 11d Pressing flange portion 11e Hand insertion portion 11f Extending piece portion 12 Second member 12a Grip piece portion 12b Pulling piece portion 12c Bolt engaging groove 12d Curved arm portion 12e Extending piece portion 13 Connecting pin W Concrete wall

Claims (1)

[Claims] 1. A buried nut 4 having a bolt 2 having a head portion 2a, a female screw 4c with which the bolt 2 is screwed, and a conical portion 4b whose diameter is expanded toward the tip side, and the embedded nut 4. A diametrical expansion piece portion 5 that is externally fitted to the embedded nut 4 in a state in which the bolt 2 is screwed into one body and that the conical portion 4b of the embedded nut 4 is press-fitted by pulling the bolt 2 to expand the diameter outward.
Anchor bolt 1 composed of collar 5 having c
Is a work tool 10 that is fixedly mounted in a drill hole 7 formed in a concrete wall W, the work tool 10 inserting the embedded nut 4 and collar 5 into the drill hole 7, and the head of the bolt 2 A pressing piece 11b for pressing the collar 5 into the drill hole 7 by gripping the gripping piece parts 11a and 12a in a state where the portion 2a is projected to the outside of the drill hole 7;
On the contrary, an anchor bolt construction tool comprising a pulling piece 12b for pulling the head 2a of the bolt 2 to the outside of the drill hole 7.