JP2000320015A - Insert instrument and its execution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the hole of a concrete structure a small diameter, reduce an execution cost, enhance the durability of an insert body and facilitate insertion into the hole of the insert body. SOLUTION: This insert instrument and its execution method screw the female screw part 2a of a substantially cylindrical ceramic-made insert body 2a whose edge is closed through a substantially cylindrical auxiliary tool 6 and a holding tool 5 on an assembling bolt 7, provide an unevenness part 2b coming into contact with a resin 4 in the hole 3a of a concrete structure 3 on the outer periphery of the insert body 2, provide flange parts 5a, 5b fitted to the hole 3a on both the ends of the holding tool 5, and provide a notch part 5c for a pulling-out tool on one flange part 5a.

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 a method of installing the same.

[0002]

2. Description of the Related Art An insert tool 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. There is widely known a configuration in which a mounting bolt is screwed into and connected to the female screw portion. Here, in order to embed the insert body in a concrete structure, there is a method in which the insert body is fixed to the inside of the mold via a plug made of resin at the time of concrete casting, and the plug is removed after the concrete is solidified ( There is also one in which a hole is dug in the wall surface of an existing concrete structure and the insert body is buried with resin or the like in this hole (Japanese Patent Publication No. 9-228485). These insert bodies are formed of ceramics which are insulators, have high corrosion resistance, and do not cause problems of electrolytic corrosion.

[0003]

Most of the conventional insert main bodies have a barrel shape or a trapezoidal shape.
As shown in FIG. 7, the publicity of No.-6326 has a screw hole 1 at the center.
1 shows an insert body 1 in which a circular disk portion 1b having a larger diameter than the cylindrical portion 1a is provided at one end of a cylindrical portion 1a having a c. What is common to these insert bodies is to increase the strength in the axial direction, that is, to prevent the insert body embedded in the concrete structure from being pulled out.
The configuration is such that the area in the direction perpendicular to the axial direction is large. 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 the outer shape of the anchor is made fine, irregularities are provided on the outer periphery thereof, and the anchor is embedded in an excavated hole of a concrete structure via an adhesive. JP-A-61-
Japanese Patent Publication No. 229070 discloses an anchor having a spiral groove on the outer periphery of the anchor.
No. is shown in the PR.

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-mentioned problems, and it is possible to reduce the diameter of a hole to be drilled in a concrete structure by increasing the burying strength of the insert body in the concrete structure. It is possible to obtain an insert device and a method for constructing the same, which can reduce the excavation cost and the construction cost, improve the durability of the insert body, and facilitate the insertion of the concrete structure into the hole. The purpose is to:

[0007]

According to a first aspect of the present invention, there is provided an insert tool having a cylindrical shape, which is engaged with an inner wall of a hole, has a notch for a removal tool, and a tip. Is closed, and an insert body formed into a substantially cylindrical shape with ceramics and having an uneven portion on the outer periphery is mounted.

According to a second aspect of the present invention, there is provided a method for installing an insert tool, wherein a holding tool having a notch portion for a sampling tool and having a cylindrical shape capable of engaging with an inner wall of a hole is closed on an assembly bolt. Along with this, a step of digging a hole in a concrete structure and a step of injecting a resin into the hole are provided by preparing an insert device equipped with an insert body formed in a substantially cylindrical shape of ceramics and having an uneven portion formed on the outer periphery, A step of inserting an assembly bolt having the holder and the insert body mounted in the hole, and filling the gap between the insert body and the inner wall of the hole with the injected resin, and a step of removing the assembly bolt and the holder after the resin is solidified. It is provided.

[0009]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIGS. 1A and 1B are a cross-sectional view and a side view of a holder, respectively, showing a state in which an insert body and a holder are inserted into a hole of a concrete structure into which a resin has been injected in the insert device according to the first embodiment. The insert main body 2 has a female screw portion 2a inside made of ceramics, is formed in a substantially cylindrical shape with a closed end, and has an uneven portion 2b formed of a ring-shaped groove on its outer periphery. A hole 3a is provided in the concrete structure 3, and a resin 4 is injected into the hole 3 as well. Reference numeral 5 denotes a substantially cylindrical holder having an inner diameter substantially the same as that of the female screw portion 2a of the insert body 2, and is formed of metal, resin, or ceramics, and has flanges 5a, 5b having the same diameter as the holes 3a at both ends. Are formed in the flange portion 5a, a plurality of notch portions 5c for extracting tools also serving as air vents, and the flange portion 5b is also provided with an air vent hole 5d.

Reference numeral 6 denotes a substantially cylindrical auxiliary tool having an inner diameter substantially the same as that of the holder 5, and flanges 6a and 6b having a diameter larger than the hole 3a are formed at both ends thereof.
Is provided with an air vent hole 6c in communication with the cutout notch 5c. The auxiliary tool 6 is provided to prevent the resin 4 from leaking. 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 body 2, the holder 5, the auxiliary tool 6, and the assembly bolt 7 are integrated, and in this state, the obtuse-shaped tip of the insert body 2 is inserted into the hole 3a into which the resin 4 has been injected. It is inserted until the flange 6b of the auxiliary tool 6 comes into contact with the surface of the concrete structure 3. At this time, the flanges 5a and 5b of the holder 5 are fitted into the holes 3a and the resin 4
Is pushed by the insert body 2 and 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 passes through the air vent hole 5d, the notch 5c for the extraction tool, and the air vent hole 6c. It is discharged outside.

Next, the entire method of installing the insert instrument having the above-described configuration will be described. First, as shown in FIG. 2A, a hole 3a is excavated in 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. 2 (c), the integrated body of the insert body 2, the holding tool 5, the auxiliary tool 6, and the assembly bolt 7 is inserted into the hole 3a as described above, and the state shown in FIG. 1 is obtained. 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 holding tool 5 is pulled out by hooking a not-shown extraction tool into the notch 5c for the extraction tool, and the holding member 5 is removed. Insert the mounting bolt 10 into the insert body 2
And the attached member 9 is attached to the concrete structure 3.

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, and the hole 3a
Can be reduced in diameter, and excavation costs and construction costs can be reduced. The insert body 2 is formed of ceramics, has high corrosion resistance, and can be used stably for a long period of time. Furthermore, since the inner wall of the hole 3a has irregularities, it is not easy to insert the insert main body 2 into the hole 3a. However, the irregularities are also provided on the outer periphery of the insert main body 2, so that these two irregularities are skillfully removed. Utilization facilitates insertion.

When the insert body 2 is provided at the entrance of the hole 3a, the insert body 2 comes into contact with the member 9 to be mounted, and the strength of the insert body 2 is insufficient, so that stable mounting strength of the member 9 cannot be obtained. Is provided on the back side of the holder 5, it does not come into contact with the member 9 to be mounted, and stable mounting strength can be obtained. In order to obtain a stable burying strength of the insert body 2, it is desirable that the insert body 2 be located at the center of the hole 3 a, but flanges 5 a, 5 b fitted to the holes 3 a are provided at both ends of the holder 5. Since it is provided, the insert body 2 can be positioned at the center of the hole 3a.

Further, a notch 5c for an extraction tool is provided in the flange portion 5a of the holder 5 so that the holder 5 can be extracted, so that the holder 5 can be reused. Does not require the resin 4, the amount of resin can be reduced.

Although the tip of the insert body 2 may be flat, the diameter of the insert body 2 is preferably reduced in order to reduce the resistance when the resin 4 is pressed into the hole 3a and the insert body 2 is inserted. For this reason, the distal end portion may be formed into an acute angle or an arc shape, or a radial concave groove or a convex groove may be provided on the distal end surface, whereby the resin 4 is pushed to the outer peripheral portion when the insert body 2 is inserted. Becomes easier. Further, since the holder 5 is removed, the material may be any of metal, resin, and ceramics. However, since the flange portion 5b comes into contact with the resin 4, it is preferable that the material does not easily adhere to the resin 4.

Embodiment 2 FIG. 4 shows a half sectional view of a holder 11 according to Embodiment 2.
The holding tool 11 is also formed in a substantially cylindrical shape similarly to the holding tool 5, and one end thereof is provided with a stepped flange 11a, and the flange 11a is provided with a notch 11b for an extraction tool also serving as an air vent hole. ing. The other end of the holder 11 is also provided with a flange portion 11c that fits into the hole 3a, and the flange portion 11c is provided with an air vent hole 11d.

In the second embodiment as well, since the flanges 11a and 11c that fit into the holes 3a are provided at both ends of the holder 11, the insert body 2 can be positioned.
Since the one flange portion 11a also comes into contact with the surface (wall surface) of the concrete structure 3, the leakage of the resin 4 can be prevented, and the auxiliary tool 6 can be eliminated. Other effects are the same as those of the first embodiment.

Embodiment 3 FIG. 5 shows a front view and a sectional view of an insert body according to Embodiment 3, and the insert body 12 of FIG. 5 is formed in a substantially cylindrical shape whose tip is closed by ceramics, and is not shown inside. A female screw portion is provided, and an uneven portion 12a formed of a spiral groove is formed on the outer periphery.

Also in the third embodiment, since the uneven portion 12a formed by the spiral groove is provided, the contact area with the resin 4 is increased, and the same effect as in the first embodiment is obtained. In addition, the uneven portion on the outer periphery of the insert main body includes, in addition, a combination of a ring-shaped groove and a linear groove, a combination of a spiral groove and a linear groove, a large number of concave or convex portions, inclined grooves, inclined linear convex portions, mesh grooves, mesh The same effect can be obtained by forming the shape with convex ridges and fine ridges.

Embodiments 4 and 5 FIGS. 6 (a) and 6 (b) are cross-sectional views of insert bodies according to embodiments 4 and 5, and the insert bodies 13 and 14 of FIGS. 13a and 14a are formed in a substantially cylindrical shape by ceramics, internal thread portions 13b and 14b are formed on the inner periphery of the main body portions 13a and 14a, and uneven portions 13c and 14c formed of ring-shaped grooves are provided on the outer periphery. . A seal 13d made of resin or the like is stretched over the tip of the main body 13a, and a cap 14d made of resin is fitted on the tip of the main body 14a.
The tip of a is closed and the resin 4 does not enter. The same effects as in the first embodiment can be obtained by using such insert main bodies 13 and 14.

[0021]

As described above, according to the present invention, the unevenness is provided on the outer periphery of the insert main body, so that the adhesive strength with the resin is increased, and it is not necessary to provide the insert main body with a large diameter portion. For this reason, the hole of the concrete structure can be reduced in diameter, and the excavation cost and the construction cost can be reduced. Also, since the insert body is formed of ceramics, it has high corrosion resistance and can be used stably for a long period of time. Furthermore, although the inner wall of the hole of the concrete structure has irregularities, the irregularities are also provided on the insert body, so that the insertion of the insert body into the hole can be facilitated by utilizing these irregularities. .

Also, since the insert body is attached to the assembly bolt via the holding tool and inserted and fixed in the hole, the insert body is buried deeper than the surface in the hole, and the insert body does not come into contact with the member to be mounted. In addition, the damage is prevented, and the strength of the opening of the hole is ensured, so that a stable mounting strength of the mounted member is obtained. Further, since the holder is engaged with the inner wall of the hole, the insert body can be positioned at the center of the hole, and the burying strength of the insert body can be increased. Further, the holding tool is provided with a notch for a removal tool, and the holding tool is extracted, so that the holding tool can be reused, and the resin is not required on the outer periphery of the holding tool, thereby reducing the amount of resin. be able to.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view and a side view of a holder in a state where an insert body and the like are inserted into a hole of a concrete structure into which a resin has been injected in an insert device according to a first embodiment of the present invention.

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

FIG. 3 is a cross-sectional view of the insert device according to the first embodiment in a state where assembly bolts and the like are removed.

FIG. 4 is a half sectional view of an insert device according to a second embodiment.

FIG. 5 is a front view of an insert body according to a third embodiment.

FIG. 6 is a sectional view of an insert body according to Embodiments 4 and 5.

FIG. 7 is a half sectional view of a conventional insert body.

[Explanation of symbols]

 2, 12-14: Insert body 2a, 13b, 14b: Female thread 2b, 12a, 13c, 14c: Uneven portion 3: Concrete structure 3a: Hole 4: Resin 5, 11: Holder 5a, 5b, 11a, 11c ... Flange portions 5c, 11b ... Notch for extraction tool 6 ... Auxiliary tool 7 ... Assembly bolt 9 ... Mounted member 10 ... Mounting bolt

Claims (2)

[Claims] 1. An insert device having an internal thread portion and having an insert body embedded in a hole of a concrete structure via a resin and a mounting bolt for screwing a member to be mounted on the internal thread portion of the insert body. On the assembling bolt, a cylindrically shaped retainer with a notch for the extraction tool, which engages with the inner wall of the hole, is closed at the tip, is formed in a substantially cylindrical shape by ceramics, and has irregularities on the outer periphery An insert instrument comprising the inserted insert body. 2. The installation of an insert device having an internal thread portion and being embedded in a hole of a concrete structure via a resin and a mounting bolt for screwing a member to be attached to the internal thread portion of the insert body. In the method, a holding tool having a notch for a removal tool, which is cylindrical and can be engaged with an inner wall of a hole, is closed on a tip, is formed in a substantially cylindrical shape by ceramics, and has an outer periphery on an assembly bolt. Preparing an insert device equipped with an insert body having an uneven portion formed thereon, a step of excavating a hole in a concrete structure, a step of injecting a resin into the hole, and assembling with a holder and an insert body mounted in the hole A step of inserting a bolt so that the injected resin fills the gap between the insert body and the inner wall of the hole, and a step of removing the assembly bolt and the retainer after the resin is solidified. And a method for constructing an insert device.