JPH07238596A - Construction method for anchor - Google Patents

Abstract

PURPOSE:To easily pull an anchor out of an object being constructed. CONSTITUTION:In the case where a locking part 4 divided into an upper half part 2 and a lower half part 3, which is bounded by a cut part 1 cut at an acute angle, is allowed to shift laterally in a hole 5 formed on an object to be constructed, the upper and lower half parts 2, 3 are allowed to shift within the range of a lateral movement clearance J formed between inner surf aces 2c, 3c of the upper and lower half parts 2, 3 and the outer surface 6a of a bolt part 6 passed through inside them when the longitudinal movement of the upper and lower half parts 2, 3 is stopped. On the other hand, when force applied to the upper half part 2 is released, the upper and lower parts 2, 3 return from the state of lateral movement to the former state, and the bolt part 6 and the locking part 4 can be removed from the hole 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor bolt construction method, and more particularly, to an improvement of an anchor construction method used in instrument mounting work and temporary mounting work.

[0002]

2. Description of the Related Art As is well known, a construction method using anchors for mounting tools and temporary plates to concrete layers and mortar layers, or mounting bases to building foundations.

As an example thereof, there is a construction method using an anchor in which the vane portions which are desired outward from the outer peripheral surface are formed in a plurality of steps. Focusing on the anchor, the vane portion has a tapered surface from the front side to the rear side of the anchor, and the tapered surface is formed so as to spread from the outer peripheral surface of the anchor. The edge of the tapered surface has an acute angle. A plurality of the blades are continuously formed to have a step shape.

Focusing on the construction method of the anchor, the anchor is driven into a construction object so that the blade portion of the anchor is located in the construction object. Then, when a force is applied in the direction of pulling out the anchor, the acute-angled edge portion of the blade portion of the anchor bites inside the concrete layer, which is the construction object, for example, and prevents the anchor from falling out. is there.

As a second example, there is a method using an anchor disclosed in Japanese Utility Model Laid-Open No. 61-193149. Focusing on the above anchor, the lower part of the bar-shaped steel material whose total length is set to about 40 to 50 times the diameter is cut at an acute angle to separate it into an upper half part and a lower half part, and a joint part is partly cut. The anchor is provided, and the lower end of the lower half portion is formed at a non-acute angle.

Focusing on the anchor construction method, first,
Drilling holes with a diameter that can be manually passed in advance at a predetermined position of the object to be worked, such as hard rock or concrete or a mortar layer, is one-third to three-fourths of the total length of the rod-shaped steel material.
Open at a depth. Next, the lower cut portion of the bar-shaped steel material is passed through the hole to the bottom of the drilled hole. After this, tap the top of the anchor with a hammer. Even by tapping and pressing the rod-shaped steel material, by itself, there is not much intrusion due to the non-acute angle lower end, while the upper half portion is moving in the axial direction,
The partially joined portion of the cut portion is disengaged and the half portion and the lower half portion are displaced along the cut portion to cause a discrepancy, and the sharp edge of the cut portion advances in the radial direction, and at the same time, the upper half portion and the lower portion. The outer peripheral surface of the half portion is pressed against the peripheral wall surface of the hole.

That is, in the anchor construction method, the upper half portion and the lower half portion are moved within a range in which the joint portion provided at the cut portion of the rod-shaped steel material does not come off. Then, by moving the upper half portion and the lower half portion in radial directions opposite to each other, while advancing the acute angle edge portion to the peripheral wall surface of the hole, the outer peripheral surface of the upper half portion and the lower half portion. It is pressed against the peripheral wall surface of the hole.

When a force for pulling out the anchor is applied, the acute-angled edge portion of the lower half portion becomes a resistance to bite into the peripheral wall surface of the hole. Further, the frictional force between the outer peripheral surfaces of the upper and lower halves and the peripheral wall surface of the hole also acts as resistance, which prevents the anchor from coming off.

[0009]

According to the above conventional technique, there are some problems in the following points. First, in the conventional technique of the first example, the anchor is driven into the construction object. When I tried to remove this anchor, I couldn't pull it out easily. That is, for example, depending on the construction object, there is a temporary structure, and the anchor may be used to install the temporary structure. When attempting to remove the anchor by removing the temporary structure or the like, the sharp edges of the plurality of blade portions of the anchor bite into the construction object around the anchor. Then, the biting of the acute-angled edge portion becomes a resistance against the force of pulling out the anchor in the axial direction. Therefore, it was difficult to pull out the anchor.

Further, even in the second prior art, the anchor fixed to the construction object could not be easily removed. That is, in the anchor fixed to the construction object, the acute-angled edge portion advances into the peripheral wall surface of the hole and bites into it. The outer peripheral surfaces of the upper half portion and the lower half portion press the peripheral wall surface of the hole. Then, the biting of the acute-angled edge portion and the friction caused by the pressing of the outer peripheral surfaces of the upper half portion and the lower half portion serve as resistance against the force of pulling out the anchor in the axial direction, and the anchor easily pulls out. There is no such thing. That is, the lock portion having the upper half portion and the lower half portion that advance to the peripheral wall surface of the hole and bite in and also press the peripheral wall surface of the hole is fixed while being moved in the radial direction. The operation of pulling out the anchor is difficult because the lock portion moves in the radial direction and the anchor is pulled out.

Further, in the anchor of the second example, the connecting portion is provided at a part of the cut portion. When the upper half part and the lower half part of the anchor are displaced along the cutting plane, the joint part is displaced within a range that does not come off, and the upper half part and the lower half part are moved in the radial direction. For this reason, the above-mentioned joint portion has rigidity sufficient to prevent the joint portion from being disengaged with respect to the displacement of the upper half portion and the lower half portion, and in addition, the upper half portion and the lower half portion are displaced to some extent. It is required to have sufficient toughness. In this way, it is difficult to implement this method because there is a problem that it is necessary to satisfy the requirements that are contrary to each other and the material selection, range, and degree of freedom in manufacturing the method are limited. It was

Therefore, the object of the present invention is, of course, not only the anchor construction method capable of reliably fixing to the construction object, but also the detachment can be easily carried out, and the material selection of the member for carrying out the implementation is also performed. , It is to provide a construction method in which the range and the degree of freedom in production are less likely to be limited.

[0013]

[Means for Solving the Problems] In order to solve the above object,
The present invention has the following technical means. That is, the present invention will be described with reference to the reference numerals in the accompanying drawings corresponding to the embodiments. In the present invention, the lock is divided into an upper half 2 and a lower half 3 with a cutting portion 1 cut at an acute angle as a boundary. While passing the portion 4 deep into the hole 5 formed in the construction object, and then applying a force from the axial direction to the upper half portion 2 desired outside the hole 5, while moving the upper half portion 2 in the axial direction, The upper half portion 2 and the lower half portion 3 are moved in the radial directions opposite to each other with the cutting portion 1 cut at the acute angle as a boundary, so that the acute edge portions of the upper half portion 2 and the lower half portion 3 respectively. 2
At the same time that the a and 3a are advanced to the peripheral wall surface 5a of the hole 5, the outer peripheral surfaces 2b and 3b of the upper half 2 and the lower half 3 are respectively moved to the hole 5a.
In the anchor construction method of pressing and fixing to the peripheral wall surface 5a of;
The lock portion 4 passed through the hole 5 formed in the construction object
In moving the upper half 2 and the lower half 3 in the hole 5 in the radial direction, the upper half 2 and the lower half 3 are separated from each other by the upper half 2
When the axial movement of the lower half part 3 and the lower half part 3 is stopped, the inner peripheral surfaces 2c and 3c of the upper half part 2 and the lower half part 3 and the outer peripheral surface 6a of the bolt part 6 passed through them are While being moved within the range of the radial movement gap J defined between them, on the other hand,
By releasing the force applied to the upper half portion 2, the upper half portion 2 and the lower half portion 3 are returned from the state of being moved in the radial direction, and the bolt portion 6 and the lock portion 4 are released from the holes. This is an anchor construction method that allows for detachment.

In moving the upper half 2 and the lower half 3 of the lock portion 4 through the hole 5 formed in the construction object in the hole 5 in the radial direction, the upper half 2 is , When the axial movement of the upper half portion is stopped, the inner peripheral surface 2c of the upper half portion 2,
Within the range of the radial movement gap J that is passed through each of the upper half 2 and the lower half 3 and is partitioned between the outer peripheral surface 6a of the bolt portion 6 to which the lower half 3 is fixed. It is also characterized by being moved by.

In addition, the upper half portion 2 and the lower half portion 3 of the lock portion 4 which are passed through the holes 5 formed in the construction object are connected to the holes 5 respectively.
When moving in a radial direction in the inside of each of the lock portions 4 having a plurality of pairs of upper half portions 2 and lower half portions 3, Peripheral surface 2c, 3c
And the outer peripheral surface 6a of the bolt portion 6 that is passed through the plurality of lock portions 4 are moved within a range of the radial movement gap J defined.

[0016]

According to the above-mentioned construction method, the lock portion 4 which penetrates deeply into the hole 5 formed in the construction object is in a state of being movable in the radial direction with respect to the bolt portion 6 by the radial movement gap J. Has been done. Then, when the axial movement of the upper half portion 2 and the lower half portion 3 is stopped, the upper half portion 2 and the lower half portion 3 move in the radial directions opposite to each other. At this time, the upper half portion 2 and the lower half portion 3 move within the range of the radial movement gap J. The radial movement gap J before the radial movement of the upper half 2 and the lower half 3 exists over the entire inner peripheral surface 2c, 3c side of the upper half 2 and the lower half 3 respectively. ing. The radial movement gap J when the radial movement of the upper half 2 and the lower half 3 is completed is
The opposite sides of the bolt portion 6 with respect to the radial direction in which the upper half portion 2 and the lower half portion 3 have moved are the inner peripheral surfaces 2c and 3c of the upper half portion 2 and the lower half portion 3 and the outer peripheral surface of the bolt portion 6. The gap disappears due to the close contact with 6a, while the moved side expands. In other words, the upper half portion 2 and the lower half portion 3 can be moved in the radial direction by the radial movement gap J, and the bolt portion 6 stops the movement in the radial direction.

Further, by releasing the force applied to the upper half portion 2, the upper half portion 2 and the lower half portion 3 are restored from the radially moved state. This is because the upper half portion 2 and the lower half portion 3 have the radial movement gap J capable of returning, and when the force applied to the upper half portion 2 is released, the upper half portion 2 and the lower half portion 3 are released. The force for pushing the lower half portion 3 in the radial direction disappears, and the upper half portion 2 and the lower half portion 3 are in the original state, that is,
The upper half portion 2 and the lower half portion 3 return to the state in which they can be moved in the radial direction with respect to the bolt portion 6.

[0018]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIGS. 1 to 9 show a first embodiment, of which FIGS. 1 to 7 show a concrete layer A and a decorative plate D.
The example of attaching is shown. The process will be described below.

On the surface of the concrete layer A, a middle finish material B and a finish material C stretched on the surface of the middle finish material B are stretched. A hole 5 is provided at a predetermined position of the concrete layer A.
Has been opened. The diameter L of the hole 5 allows the lock portion 4 of the anchor bolt 13 used in this embodiment to pass through. Is the diameter. A through hole 7 is also formed at a predetermined position on the decorative plate D. The diameter of the through hole 7 is a diameter that allows the bolt portion 6 of the anchor bolt 13 to pass therethrough.

Here, the lower half 3 of the upper half 2 and the lower half 3 will be described. Assuming that the central axis N of the lower half portion 3 and the central axis N of the bolt portion 6 coincide with each other, first, the inner radius of the lower half portion 3 is r, and the radius of the bolt portion 6 is s. . From these, the distance that the upper half portion 2 can move in the radial direction can be represented by rs. Therefore, the radius L of the hole 5 is smaller than the r-s value (see FIG. 5).

Here, paying attention to the structure of the anchor bolt 13, it has a lock portion 4 which is divided into an upper half portion 2 and a lower half portion 3 with a cutting portion 1 cut at an acute angle as a boundary. The surface corresponding to the cutting portion 1 is the cutting surface 2 of the upper half portion 2.
The cut surface 3d of the lower half 3 is used. The lock portion 4 has a bolt portion 6 which is passed through the upper half portion 2 and the lower half portion 3. The bolt portion 6 is long by a predetermined length, and another member is fixed to this relatively long portion. The lock part 4
A screw portion 6b is formed on one side, and a stopper portion 8 is formed on the other side. The nut 9 and the spring washer 10 are attached to the threaded portion 6b when the anchor bolt 13 is attached to the construction object. Further, the stopper portion 8 has a diameter equal to the outer diameter of the lower half portion 3. This prevents the lower half portion 3 from falling off from the bolt portion 6. Further, the tip end surface 8a of the stopper portion 8 comes into contact with the bottom surface 5b of the hole 5 when the anchor bolt 13 is inserted all the way into the hole 5. This allows
The rotation of the bolt portion 6 due to the rotation of the nut 9 is prevented by the frictional force.

Further, a radial movement gap J is defined between the inner peripheral surfaces 2c and 3c of the upper half 2 and the lower half 3 of the lock portion 4 and the outer peripheral surface 6a of the bolt portion 6, respectively. ing. The radial movement gap J is a gap for allowing the upper half 2 and the lower half 3 to move in the radial direction.

Further, the upper end surface 2e of the upper half portion and the lower half portion 3
The lower end surface 3e of is a surface perpendicular to the axial direction. As a result, the force due to the tightening of the nut 9 causes
It is easy to reach.

In the anchor bolt 13, the lock portion 4 and the bolt portion 6 are passed through the hole 5 in the axial direction. At the same time, the bolt portion 6 is passed through the through hole 7 of the decorative plate D. The lock portion 4 and the bolt portion 6 passed through the hole 5 are stopped when the tip end surface 8a of the stopper portion 8 abuts the bottom surface 5b of the hole.

Then, the spring washer 10 and the nut 9 are attached and tightened to the screw portion 6b of the bolt portion 6. The force due to the tightening of the nut 9 is transmitted to the upper half portion 2 via the decorative plate D. As a result, the upper half portion 2 moves in the axial direction and presses the lower half portion 3 against the stopper portion 8.

Further, when the axial movement of the upper half portion 2 and the lower half portion 3 is stopped by tightening the nut 9, the upper half portion 2 and the lower half portion 3 are cut at the acute angle. It can be moved in the radial direction with 1 as the boundary. The radial directions in which the upper half portion 3 and the lower half portion 3 move are directions opposite to each other.

The radial movement of the upper half portion 2 and the lower half portion 3 is movement within the range of the radial movement gap J. That is, the radial movement gap J before the radial movement of the upper half portion 2 and the lower half portion 3 extends over the entire inner peripheral surface 2c, 3c side of the upper half portion 2 and the lower half portion 3, respectively. Existing. Further, the radial movement gap J in the state where the radial movement of the upper half portion 2 and the lower half portion 3 is completed is not a gap on one side. That is, the inner peripheral surfaces 2c and 3c of each of the upper half portion 2 and the lower half portion 3 are in close contact with the outer peripheral surface 6a of the bolt portion 6.
The close contact position is a position on the opposite side to the moving direction of the upper half 2 and the lower half 3 with the bolt 6 interposed therebetween.

Regarding the radial movement of the upper half portion 2 and the lower half portion 3, in other words, referring to FIG. 5 to FIG. 7, in other words, before the nut 9 is tightened, the upper half portion 2 and the lower half portion are tightened. The outer peripheral surfaces 2b and 3b of the shaft 3 are located at a distance T from the central axis N of the bolt portion 6. Then, when the upper half 2 and the lower half 3 are moved in the radial direction by tightening the nut 9, the outer peripheral surfaces 2b, 3 of the upper half 2 and the lower half 3 respectively.
b is located radially outward from the central axis N of the bolt portion 6 by a distance K.

In this way, the upper half portion 2 and the lower half portion 3 are moved in the radial direction, so that the acute-angled edge portions 2a and 3a of the upper half portion 2 and the lower half portion 3 have the holes 5 respectively. The outer peripheral surfaces 2b and 3b of the upper half portion 2 and the lower half portion 3 are pressed and fixed to the peripheral wall surface 5a of the hole 5 at the same time as they are advanced to the peripheral wall surface 5a. The decorative layer D is applied to the concrete layer A by the axial force received from the nut 9.
Is fixed.

When a force is applied in the axial direction for pulling out the anchor bolt 13, the upper half portion 2 and the lower half portion 3 are pulled.
The respective acute-angled edge portions 2a and 3a serve as a resistance to bite into the peripheral wall surface 5a of the hole 5. Further, the frictional force between the outer peripheral surfaces 2b and 3b of the upper half portion 2 and the lower half portion 3 and the peripheral wall surface 5a of the hole 5 also acts as resistance, and the anchor bolt 13 is prevented from coming off.

Next, referring to FIG. 8, there is shown a state in which the anchor bolt 13 is used for another construction. That is, this is an example in which the base F is fixed to the foundation E. In this example, the acute-angled edge portions 2a and 3a of the upper half portion 2 and the lower half portion 3 are the base E, respectively.
The outer peripheral surfaces 2b and 3b of the upper half portion 2 and the lower half portion 3 are pressed against the peripheral wall surface 5a of the hole 5 and fixed at the same time as they are advanced to the peripheral wall surface 5a of the hole 5 formed in. There is.
The base F is fixed to the foundation E by the axial force received from the nut 9.

Next, referring to FIG. 9, an example is shown in which the bolt portion 6 of the anchor bolt portion 13 is extended to form a pipe body G, and the anchor bolt 13 is fixed to the mortar layer H. In this example, an inner screw is cut on the lower portion of the pipe body G, and the pipe body G is attached to the bolt portion 6. As another method of connecting the pipe body G and the bolt portion 6, a socket member having an internal thread is prepared, and an external thread is cut on the lower portion of the pipe body G. Then, the pipe body G and the bolt portion 6 may be attached from both sides of the socket member.

Next, a second embodiment will be described with reference to FIGS. 10 and 11. First, the anchor bolt used in this embodiment
Focusing on 13, the lower half portion 3 is fixed to the bolt portion 6. As for the fastening, the inner peripheral surface 3c of the lower half portion 3 and the outer peripheral surface 6a of the bolt portion 6 corresponding to the inner peripheral surface 3c are threaded, and the respective screws are engaged with each other. As a result, even if a force is applied to the lower half portion 3 from the axial direction, the lower half portion 3 does not move.

Then, as in the first embodiment, the case where the anchor bolt 13 is fixed through the hole 5 formed in the concrete layer A will be considered. In this embodiment, substantially the same parts as those in the first embodiment are omitted, only different parts are described, and the same applies to the following embodiments.

That is, when the upper half portion 2 and the lower half portion 3 of the lock portion 4 passed through the hole 5 formed in the concrete layer A are radially moved in the hole 5, the upper half portion 2 is ,
When the axial movement of the upper half portion 2 is stopped, move the upper half portion 2 within the radial movement gap J defined between the inner peripheral surface 2c of the upper half portion 2 and the outer peripheral surface 6a of the bolt portion 6. To be When the anchor bolt 13 is seen in detail, the movement in the hole 5 is such that the upper half 2 moves in the radial direction and the lower half 3 moves.
Also moves in the total direction with the bolt portion 6.

Next, a third embodiment will be described with reference to FIGS. Focusing on the anchor bolt 13 used in this embodiment, a plurality of pairs of the upper half portion 2 and the lower half portion 3 are provided. The boundary surface 15 between the pair of adjacent lock portions 4 has a surface perpendicular to the axial direction. Thereby, the force applied in the axial direction due to the tightening of the nut 9 is easily transmitted to the plurality of pairs of lock portions 4.

When the upper half 2 and the lower half 3 of the lock portion 4 which are inserted into the hole 5 formed in the concrete layer A are moved in the hole 5 in the radial direction, the upper half having a plurality of pairs is provided. The part 2 and the lower half 3 are the upper half 2 and the lower half 3 described above.
Each of the inner peripheral surfaces 2c, 3c and the outer peripheral surface 6a of the bolt portion 6 are moved within a range of a radial movement gap J.

Next, referring to FIGS. 14 and 15, there is shown a modification of the anchor bolt 13 used in the first embodiment. That is, the anchor bolt 13 of this modified example is similar to the bolt portion 6 described above.
The convex portion 14 is formed at the tip of the stopper portion 8. The convex portion 14 is formed across the diameter direction of the stopper portion 8, and when the anchor bolt 13 is inserted into the hole 5, the convex portion 14 bites into the bottom surface 5b of the hole 5. As a result, the rotation of the bolt portion 6 when the nut 9 is rotated can be prevented. The convex portion 14 may have another shape that can prevent the rotation of the bolt portion 6.

When carrying out the above anchor construction method, the nut 9 of the anchor bolt 13 may be a double nut.

As described above, the upper half portion 2 and the lower half portion 3 which have been moved in the radial direction return to their original state only by releasing the force applied to the upper half portion 2, so that they can be easily restored. The bolt portion 6 and the lock portion 4 can be removed from the hole 5.
Further, since the upper half portion 2 and the lower half portion 3 move in the radial direction within the range of the radial movement gap J, the bolt portion 6 has
No excessive force is applied when the upper half 2 and the lower half 3 are moved in the radial direction. By the way, applying the force means that in the present embodiment, the nut 9 is tightened to transmit the force in the axial direction,
Further, releasing the force means loosening the nut 9 to eliminate the force in the axial direction.

[0041]

As described in detail above, according to the present invention, according to claim 1, the upper half portion and the lower half portion of the lock portion are moved in the radial direction, and the upper half portion and the lower half portion respectively have sharp-edged edge portions. Is advanced to the peripheral wall surface of the hole, and at the same time, the outer peripheral surfaces of the upper half part and the lower half part are pressed against the peripheral wall surface of the hole. As a result, when a force is applied in the pulling-out direction of the lock part, the bite of the acute-angled edge part on the peripheral wall surface becomes a resistance, and the friction between the outer peripheral surface of the upper half part and the lower half part and the peripheral wall surface of the hole is reduced. It becomes a resistance, the throwing of the anchor bolt is prevented,
Of course, it can be securely fixed to the construction object,
By simply releasing the force applied to the upper half part, the upper half part and the lower half part return from the state of moving in the radial direction,
The bolt portion and the lock portion can be easily removed from the hole. Further, the bolt portion is inserted into the upper half portion and the lower half portion, and by moving the upper half portion and the lower half portion in the radial direction within the range of the radial movement gap,
No excessive force is applied in the radial direction of the upper and lower halves.
As a result, it is difficult to limit the degree of freedom in material selection, range, and manufacturing of the bolt portion when implementing.

According to the second aspect of the present invention, by fixing only the upper half portion, it is possible to surely fix the work piece on the construction object, and of course the force applied to the upper half portion. It is possible to easily return the bolt portion and the lock portion from the hole by returning from the state in which the upper half portion has moved in the radial direction simply by releasing. In addition, the bolt portion,
No unreasonable force is applied when the upper half is moved in the radial direction, and it is difficult to limit the freedom of material selection, range, and manufacturing of the bolts when carrying out.

According to the third aspect of the invention, the lock portions having a plurality of pairs are moved in the radial direction, so that the acute-angled edge portions of the upper half portion and the lower half portion respectively bite into the peripheral wall surface of the hole. A stronger resistance to the pulling force of the lock portion is obtained, and a stronger resistance to the pulling force of the lock portion is obtained by the outer peripheral surfaces of the upper half portion and the lower half portion pressing the peripheral wall surfaces of the holes.

[Brief description of drawings]

FIG. 1 is a perspective view showing a completed mounting of a decorative board mounting example on a concrete layer according to a first embodiment of an anchor construction method of the present invention.

FIG. 2 is a perspective view showing a state before an anchor bolt is passed through a hole in an example of attaching a decorative plate to a concrete layer according to the first embodiment of the anchoring method of the present invention.

FIG. 3 is a perspective view showing a state in which the anchor bolt of the example of mounting the decorative plate on the concrete layer according to the first embodiment of the anchoring method of the present invention is being inserted into the hole.

FIG. 4 is a perspective view showing a state in which the nut of the anchor bolt of the example of mounting the decorative plate on the concrete layer of the first embodiment of the anchoring method of the present invention is tightened.

FIG. 5 is an enlarged view of FIG. 3 showing an example of mounting a decorative plate on a concrete layer according to the first embodiment of the anchoring method of the present invention.

FIG. 6 is an enlarged view of FIG. 1 showing an example of mounting a decorative plate on a concrete layer according to the first embodiment of the anchoring method of the present invention.

FIG. 7 is a vertical sectional view of FIG. 2 showing an example of mounting a decorative plate on a concrete layer according to the first embodiment of the anchor construction method of the present invention.

FIG. 8 is a perspective view of an example of fixing the base to the foundation according to the first embodiment of the anchoring method of the present invention.

FIG. 9 is a perspective view of a reinforcing bar implementation example of the first embodiment in the anchoring method of the present invention.

[Fig. 10] Fig. 10 is a diagram showing a state in which the mounting of the decorative board mounting example to the concrete layer of the second embodiment in the anchor construction method of the present invention has been completed.

FIG. 11 is a vertical sectional view of FIG. 10 showing a second embodiment of the anchor construction method of the present invention.

[Fig. 12] Fig. 12 is a diagram showing a state in which attachment of the decorative plate attachment example to the concrete layer of the third embodiment in the anchor construction method of the present invention has been completed.

FIG. 13 is a vertical sectional view of FIG. 12 showing a third embodiment of the anchor construction method of the present invention.

FIG. 14 is a diagram showing a modified example of the first embodiment of the anchoring method of the present invention, showing a state where the mounting of the decorative board mounting example on the concrete layer is completed.

FIG. 15 is a vertical cross-sectional view of FIG. 14 showing a modification of the anchor bolt in the first embodiment of the anchoring method of the present invention.

[Explanation of symbols]

 1 cutting part 2 upper half part 2a acute-angled edge part of the upper half part 2b outer peripheral surface of the upper half part 2c inner peripheral surface of the upper half part 2d cutting surface of the upper half part 2e upper end surface of the upper half part 3 lower half part 3a bottom Half sharp edge 3b Lower half outer peripheral surface 3c Lower half inner peripheral surface 3d Lower half cutting surface 3e Lower half lower end surface 4 Lock part 5 hole 5a Hole peripheral wall surface 5b Hole bottom surface 6 Bolt section 6a Bolt section outer peripheral surface 6b Bolt section thread section 7 Through hole 8 Stopper section 8a Stopper section tip surface 9 Nut 10 Spring washer 13 Anchor bolt 14 Convex section 15 Boundary surface A Concrete layer B Middle Finishing material C Finishing material D Decorative board E Foundation F Base G Pipe body H Mortar layer J Radial movement gap L Hole radius N Center axis T Distance between center axis and outer peripheral surface of lock K Radial movement distance of lock r Inner radius of lower half s Radius of bolt

Claims (3)

[Claims] 1. A lock portion 4 which is divided into an upper half portion 2 and a lower half portion 3 with a cutting portion 1 cut at an acute angle as a boundary is passed through a hole 5 formed in an object to be worked, and then, An axial force is applied to the desired upper half portion 2 outside the hole 5 to move the upper half portion 2 in the axial direction, and the upper half portion 2 is separated by the cut portion 1 cut at the acute angle. And the lower half 3 are moved in opposite radial directions so that the sharp edge portions 2a, 3a of the upper half 2 and the lower half 3 respectively advance to the peripheral wall surface 5a of the hole 5 and at the same time In the anchor construction method in which the outer peripheral surfaces 2b, 3b of the upper half portion 2 and the lower half portion 3 are pressed against the peripheral wall surface 5a of the hole 5 to be fixed; the lock passed through the hole 5 formed in the construction object In moving the upper half 2 and the lower half 3 of the part 4 in the hole 5 in the radial direction, the upper half 2 and the lower half 3 are
When the axial movement of the upper half portion 2 and the lower half portion 3 is stopped, the inner peripheral surfaces 2c and 3c of the upper half portion 2 and the lower half portion, respectively, and the outer peripheral surface of the bolt portion 6 passed through them. While being moved within the range of the radial movement gap J defined between 6a and
On the other hand, by releasing the force applied to the upper half 2,
An anchor construction method characterized in that the upper half portion (2) and the lower half portion (3) are returned from the state of being moved in the radial direction, and can be removed from the holes of the bolt portion (6) and the lock portion (4). 2. When moving the upper half portion 2 and the lower half portion 3 of the lock portion 4 which are passed through the hole 5 formed in the construction object in the radial direction in the hole 5, the upper half portion 2 is , When the axial movement of the upper half 2 is stopped, the lower half 3 is passed through the inner peripheral surface 2c of the upper half 2 and each of the upper half 2 and the lower half 3.
Is an anchor construction method characterized in that it is moved within a range of a radial movement gap J defined between the bolt portion 6 and the outer peripheral surface 6a of the bolt portion 6. 3. When moving the upper half portion 2 and the lower half portion 3 of the lock portion 4 passing through the hole 5 formed in the construction object in the hole 5 in the radial direction, the upper half portion 2 and The lock part 4 having a plurality of pairs of the lower half part 3 is the plurality of lock parts 4
The inner peripheral surface 2c, 3c of each of the upper half 2 and the lower half 3,
An anchor construction method characterized in that it is moved within a range of a radial movement gap J defined between an outer peripheral surface 6a of a bolt portion 6 which is passed through the plurality of lock portions 4.