JP2000320017A - Insert body in insert instrument and its execution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the diameter of a hole excavated in a concrete structure and make an excavation cost and an execution cost inexpensive by closing the edge to be formed substantially cylindrically, having a female screw part in the inside, and forming unevenness on the outer periphery. SOLUTION: An insert body 2 has a female thread part 2a in the inside by ceramics, forms it into a substantial cylinder closing the edge, and forms the unevenness part 2b of a ring-like groove on the outer periphery. A hole 3a is provided in a concrete a structure 3, and a resin 4 is injected into the hole 3a. The flange part 5a of the same diameter as the hole 3a is formed on one end of a substantially cylindrical holding tool 5, and a vent 5b is provided in the axial direction. Thereby a large diameter part need not be provided on the insert body 2, the hole 3a of the concrete structure 3 is reduced in diameter, and an excavation cost and an execution cost can be reduced. In addition, the insert body 2 can be formed of ceramics, durability is high, and can be stably used for a long time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert device used for attaching various members to a concrete structure, and more particularly to an insert body buried in a concrete structure and a method of installing the same.

[0002]

2. Description of the Related Art An insert instrument of this type generally comprises an insert body used as a female member and a mounting bolt used as a male member, and the insert body is previously embedded in a concrete structure. 2. Description of the Related Art There is widely known a configuration in which a mounting bolt is screwed into a screw hole of a main body and connected thereto. In order to bury the insert body in a concrete structure, there is a method in which the insert body is fixed in a formwork via a plug made of resin at the time of concrete casting, and the plug is removed after the concrete is solidified (actually, 6-year-old). There is also a method in which a hole is dug in a wall or the like of an existing concrete structure, and an insert body is buried in the hole with a resin or the like (Japanese Patent Application Laid-Open No. 9-228485). These insert bodies are made of ceramics, which is an insulator.
High corrosion resistance and no problem of electrolytic corrosion.

[0003]

The insert body of the conventional insert device has a barrel shape or a trapezoidal shape in most cases. As shown in FIG. 1 shows an insert body 1 in which a disk portion 1b having a larger diameter than the cylindrical portion 1a is provided at one end of a cylindrical portion 1a having a cylindrical portion 1c. What is common to these insert bodies is that the strength in the axial direction, that is, the structure in which the area in the direction orthogonal to the axial direction is large so that the insert body buried in the concrete structure is not pulled out, is large. That is being done. However, when the area of the insert body in the direction orthogonal to the axial direction is increased, when burying the insert body in an existing concrete wall later, it is necessary to dig a large-diameter hole, which generally increases the construction cost. .

On the other hand, an anchor which can solve this problem is an anchor, in which irregularities are provided on the outer periphery of a fine anchor, and this anchor is embedded in an excavated hole of a concrete structure via an adhesive. Japanese Patent Application Laid-Open No. 59-65610 discloses an anchor having a spiral groove on the outer periphery of the anchor.

The above-mentioned anchor is provided with an uneven or spiral groove on the outer periphery to increase the contact area with the adhesive or the hole of the concrete structure so as not to be pulled out, and to reduce the diameter of the anchor. Therefore, the hole diameter of the concrete structure can be reduced. However, since the anchor is directly buried, when the anchor is made of metal, corrosion damage occurs and the anchor becomes unusable. Therefore, it is necessary to re-drill a hole or to drill an adjacent hole, and it has been difficult to use the hole stably for a long period of time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. By increasing the burial strength of a concrete structure, a hole to be drilled in the concrete structure can be reduced in diameter. It is an object of the present invention to obtain an insert body and an insert method for an insert device which can reduce cost and construction cost, can increase durability, and can easily insert a concrete structure into a hole. Aim.

[0007]

According to a first aspect of the present invention, there is provided an insert body having an insert body having a substantially cylindrical shape having a closed end and a ceramic.
It is embedded in a concrete structure via a resin, has a female screw portion inside, and has an uneven portion formed on the outer periphery.

According to a second aspect of the present invention, there is provided a method for installing an insert body in an insert device, comprising the steps of: excavating a hole in a concrete structure; injecting resin into the hole; A step is provided in which an insert body formed into a substantially cylindrical shape with ceramics and provided with an uneven portion on the outer periphery is inserted into the hole, and the injected resin fills the space between the insert body and the inner wall of the hole.

[0009]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a state in which an insert body according to Embodiment 1 of the present invention is inserted into a hole of a concrete structure in which resin has been injected in advance. The insert body 2 has a female screw portion 2a made of ceramics therein. It is formed in a substantially cylindrical shape with a closed end, and has an uneven portion 2b formed of a ring-shaped groove on the outer periphery. A hole 3a is provided in the concrete structure 3, and a resin 4 is injected into the hole 3a. Reference numeral 5 denotes a substantially cylindrical holder having an inner diameter approximately the same as that of the female screw portion 2a of the insert body 2, which is formed of resin or ceramics, and has a flange 5a having the same diameter as the hole 3a at one end thereof. An air vent hole 5b is provided in the flange portion 5a in the axial direction.

Reference numeral 6 denotes a cylindrical auxiliary tool having substantially the same diameter as the holder 5, and has flange portions 6a and 6b formed at both ends thereof.
The flange portion 6b is provided with an air vent hole 6c at a position communicating with the air vent hole 5b. Reference numeral 7 denotes an assembling bolt, which is inserted through the auxiliary tool 6, inserted through the holder 5 from the flange 5 a side, and screwed into the female screw 2 a of the insert body 2. As a result, the insert main body 2, the holding tool 5, the auxiliary tool 6, and the assembly bolt 7 are
b, 6c are integrated so as to communicate with each other, and in this state, the flange portion 6b of the auxiliary tool 6 is inserted into the hole 3a into which the resin 4 is injected, with the obtuse-shaped tip of the insert body 2 at the top. Insert until it touches the surface of. At this time, the flange 5a of the holder 5 closes the hole 3a and the resin 4
Moves so as to fill the space between the inner wall of the hole 3a and the insert body 2, and the air in the hole 3a is discharged to the outside through the air vent holes 5b and 6c.

Next, the entire method of applying the insert body 2 having the above configuration will be described. First, as shown in FIG. 2A, a hole 3a is excavated on a surface such as a wall surface or a floor surface of the concrete structure 3. Next, as shown in FIG. 2B, a predetermined amount of the resin 4 is injected into the hole 3a using the resin injection tool 8. Next, in FIG. 2C, the insert main body 2, the holding tool 5, the auxiliary tool 6, and the assembly bolt 7 are integrated as described above, and inserted into the hole 3a with the tip end of the insert main body 2 at the head. The state is as shown in FIG. At this time, the resin 4 is pushed to the outer periphery of the insert body 2 and the holder 5 by the insert body 2 and fills the space between these and the inner wall of the hole 3a. As a result, the air in the hole 3a is removed from the air vent holes 5b and 6c.
Is discharged to the outside.

Next, after the resin 4 is solidified, as shown in FIG. 3, the assembling bolt 7 and the auxiliary tool 6 are removed, and the mounting member 9 is removed.
The mounting member 9 is attached to the concrete structure 3 by inserting the mounting bolt 10 inserted through the holder 5 into the female screw 2 a of the insert body 2.

In the first embodiment, the insert body 2
Is formed on the outer periphery of the resin 4, the contact area with the resin 4 is increased, and the adhesive strength with the resin 4 is increased. For this reason,
There is no need to provide a large diameter portion in the insert body 2, the hole 3a of the concrete structure 3 can be reduced in diameter, and excavation costs and construction costs can be reduced. The insert body 2 is made of ceramics.
High durability and stable long-term use. Further, since the inner wall of the hole 3a of the concrete structure 3 has irregularities, it is not easy to insert the insert main body 2 into the hole 3a. However, since the irregularities 2b are also provided on the outer periphery of the insert main body 2, By making good use of these irregularities, insertion becomes easy.

Although the tip of the insert body 2 may be flat, it is preferable to reduce the diameter of the insert body 2 in order to reduce the resistance when the resin body 4 is inserted into the hole 3a. Embodiments 2 to 7 FIGS. 4 (a) to 4 (e) show front views of insert bodies according to embodiments 2 to 7, showing modified examples of the uneven portions provided on the outer periphery of the insert body. The insert main body 11 of FIG. 4A is formed by forming the outer concave and convex portions 11a with a spiral groove, and the insert main body 12 of FIG. 4B is formed by forming the outer concave and convex portions 12a with the spiral groove 12b in the axial direction. It is formed by a combination with the straight groove 12c. or,
The insert body 13 shown in FIG.
Are formed by a large number of concave portions (dimples). The insert body 14 shown in FIG.
4a is formed by an inclined groove or an inclined linear convex portion inclined with respect to the axial direction. The insert body 15 shown in FIG. 4E has an uneven portion 15a on the outer periphery formed by a mesh groove, a mesh-shaped convex portion, or a fine convex portion.
The insert body 16 shown in FIG.
Is formed by a large number of convex portions. Other configurations are the same as those of the first embodiment, and each of the insert main bodies 11 to 1
6 has the same effect as the first embodiment because the contact area with the resin 4 is increased. Embodiments 8 to 10 FIGS. 5 (a) to 5 (c) show front views of insert bodies according to embodiments 8 to 10, and FIG.
Reference numeral 7 denotes an outer peripheral uneven portion 17a formed by a plurality of convex portions, and a tip end portion formed in an arc shape. The insert body 18 shown in FIG. 5B has an outer peripheral uneven portion 18a formed by a plurality of convex portions, and a distal end portion formed into an acute cone. The insert body 19 shown in FIG.
9a is formed by a plurality of protrusions, and a radial groove or protrusion 19b is formed on the surface of the conical portion at the tip end.

In the eighth to tenth embodiments, the uneven portions 17a
19a is provided in order to obtain the same effect as in the first to seventh embodiments, and the tip portion is formed in an arc shape or an acute cone shape, or a radial groove or projection 19b is formed in the cone portion.
The reason why is provided is to reduce the resistance when inserting the insert bodies 17 to 19 into the resin 4 and to facilitate the insertion. Other configurations and effects are the same as those of the above embodiments.

Embodiments 11 and 12 FIGS. 6 (a) and 6 (b) are cross-sectional views of insert bodies according to embodiments 11 and 12, and the insert bodies 20 and 21 of FIGS. 20a and 21a are formed in a substantially cylindrical shape by ceramics, and the main body portions 20a and 21a are formed.
Are formed on the inner periphery with female thread portions 20b and 21b, and the outer periphery is provided with concave and convex portions 20c and 21c formed of ring-shaped grooves. A seal 20d made of resin or the like is stretched over the tip of the main body 20a, and a cap 21d made of resin is fitted on the tip of the main body 21a.
The tip of 21a is closed so that the resin 4 does not enter. The same effects as in the first embodiment can be obtained by using such insert main bodies 20, 21.

[0017]

As described above, according to the present invention, the unevenness is provided on the outer periphery of the insert body, so that the adhesive strength with the resin is increased, and the hole to be drilled in the concrete structure can be reduced. Cost and construction cost can be reduced. Further, since the insert body is formed of ceramics, it has high corrosion resistance and can be used stably for a long period of time. Further, by providing irregularities on the outer periphery of the insert body, insertion into a hole having irregularities on the inner wall becomes easy.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which an insert body according to Embodiment 1 of the present invention is inserted into a hole of a concrete structure into which a resin has been injected.

FIG. 2 is an explanatory view showing a method for installing an insert body according to Embodiment 1.

FIG. 3 is a cross-sectional view of the insert main body according to the first embodiment in a state where an assembly bolt and an auxiliary tool have been removed after solidification of the resin.

FIG. 4 is a front view of an insert body according to Embodiments 2 to 7;

FIG. 5 is a front view of an insert body according to Embodiments 8 to 10.

FIG. 6 is a sectional view of an insert body according to Embodiments 11 and 12.

FIG. 7 is a semi-longitudinal front view of a conventional insert body.

[Explanation of symbols]

 2, 11 to 21 Insert body 2a, 20b, 21b Female thread 2b, 11a to 19a, 20c, 21c Uneven portion 3 Concrete structure 3a Hole 4 Resin 9 Member to be attached 10 Mounting bolt

Claims (2)

[Claims] 1. An insert device having an internal thread portion and having an insert body embedded in a concrete structure and a mounting bolt for screwing a member to be mounted to the internal thread portion of the insert body, the tip is closed. An insert body, which is formed in a substantially cylindrical shape with ceramics, is embedded in a concrete structure via a resin, has a female screw portion inside, and is provided with an uneven portion on an outer peripheral portion. 2. A method for constructing an insert main body in an insert device having an internal thread portion and having an insert body embedded in a concrete structure and a mounting bolt for screwing a member to be mounted on the internal thread portion of the insert body. ,
The step of excavating a hole in a concrete structure, the step of injecting resin into the hole, the tip was closed, a female screw part was formed inside, it was formed into a substantially cylindrical shape by ceramics, and the uneven part was provided on the outer periphery A method for installing an insert main body in an insert device, comprising a step of inserting an insert main body into a hole so that an injected resin fills a space between the insert main body and an inner wall of the hole.