JP2001173111A - Fitting method of insert - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting method of an insert capable of exposing the surface of an insert to the surface of s concrete structure. SOLUTION: A screw is cut on the inside face of a hollow hole of a hollow cylinder to form an insert. An injection cylinder is inserted inside the hollow hole. A cover body is attached to the end face of the surface side of the insert. The leg of the bottom plate is determined so that the surface side end face of the insert put in the insert hole coincides with the surface of the concrete structure and a hardener is injected, or one end of a support shaft is fixed through the screw on the insert inside face and the insert is fitted to a form by the othe other end of the support shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting an insert.

[0002]

2. Description of the Related Art In a structure that cannot be welded, such as a concrete structure, a mounting bracket called an insert is used to mount another member. This insert is a cylindrical body with a screw engraved inside. When a concrete structure has already been completed, an insert hole is drilled in the structure, an insert is set therein, and the surroundings are filled with a hardening material and installed. When installing an insert at the same time as the construction of a concrete structure, the insert is attached to the inside of the formwork, and concrete is cast and installed.

[0003]

The above-mentioned conventional method for mounting an insert has the following problems. <A> Generally, as shown in FIG. 10, an insert is installed inside a concrete structure. For this reason, it is difficult to confirm the position of the insert only by looking from the outside of the structure. <B> In particular, in the method of placing concrete after placing the insert in the formwork, the position of the insert may be hidden by the cement paste film that has flowed out, and it takes time and trouble to confirm. <C> If the insert is located at the back of the concrete structure, bolts and the like attached to the insert become cantilever beams, which is disadvantageous for bending and shearing.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems, and to provide a method of mounting an insert which can expose the surface of the insert to the surface of a concrete structure. With the goal.

[0005]

In order to achieve the above-mentioned object, a method of mounting an insert according to the present invention is characterized in that the insert is formed by engraving a screw on an inner surface of a hollow hole of a hollow cylindrical body, Attach the bottom plate with the legs protruding and opening the through hole to one end of the insert, insert the injection cylinder inside the hollow hole,
The tip of the injection cylinder is opened toward the through hole of the bottom plate, a lid is attached to the end face on the front side of the insert, and a ring is projected from one side of this lid, and the insert hole is cut in the concrete structure. The dimensions of the legs of the bottom plate are set so that the front end face of the inserted insert matches the surface of the concrete structure, and the outer diameter of the ring of the lid is set equal to the inner diameter of the insert hole. After inserting the insert into the insert hole, insert the ring of the lid into the insert hole, fix it, and inject the solidified material inside the insert hole and outside of the insert through the injection cylinder. It features a mounting method.

[0006] The method of mounting the insert according to the present invention is as follows.
The insert is constructed by engraving a screw on the inner surface of the hollow hole of the hollow cylinder, fixing one end of the support shaft via the screw on the inner surface, and attaching the insert to the mold by the other end of this support shaft. After that, concrete is poured into the formwork,
It features an insert mounting method.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

<A> Shape of insert. The insert 1 is formed by engraving a screw on the inner surface of the hollow hole 11 of the hollow cylindrical body. In particular, the insert 1 of the present invention is configured by enlarging or reducing a part of the outer diameter. By providing such a change in the outer diameter, it is possible to obtain a large resistance to pulling out.

<B> Bottom plate 2. The bottom plate 2 is formed of a disk having the legs 21 protruding therefrom and having the through holes 23 opened. The radial plate 24 protrudes radially from the outer periphery of the bottom plate 2. Therefore, the insert 1 can be located at the center of the insert hole, and at the same time, the curing agent described later can be smoothly filled. On the opposite side of the leg 21, a screw cylinder 22 protrudes. The screw cylinder 22 is formed with a screw on the outer periphery. The diameter and pitch of the screw are the same as those of the screw engraved on the inner surface of the hollow hole 11 of the insert 1.

<C> Injection cylinder 3. The injection cylinder 3 is a tubular body that is longer than the length of the insert 1 and penetrates. A screw is engraved on the outer periphery of the tip of the injection cylinder 3. These screws are configured to have the same diameter and pitch as the screws engraved on the inner surface of the screw cylinder 22 of the bottom plate 2 and can be screwed together.

<D> Cover plate 4. The cover plate 4 is a disk having a size larger than the outer diameter of the insert 1. At the center of the cover plate 4, a center hole 41 larger than the outer diameter of the injection cylinder 3 is opened. Further, an exhaust port 42 is opened in a part of the cover plate 4. An annular body 43 protrudes from one surface of the cover plate 4. The outer diameter of the ring 43 is made equal to the inner diameter of the insert hole 5.

<E> Drilling of the insert hole 5. An insert hole 5 is drilled at a predetermined position in an existing concrete structure. The depth of the insert hole 5 is set to be the same as the distance from the tip of the leg 21 of the insert 1 to which the bottom plate 2 is attached to the surface of the insert 1.

<F> Installation of insert 1 It is attached to one end of the insert 1 via the screw tube 22 of the bottom plate 2. Then, the legs 21 of the bottom plate 2 project outward. When the tip of the insert 1 is placed at the bottom of the hole, the surface 12 of the insert 1 coincides with the surface of the concrete structure. Further, the bottom plate 2 has a radiation plate 24 in the radial direction.
Is protruded, the insert 1 is located at the center of the insert hole.

<G> Installation of the injection cylinder 3. Before or after the installation of the insert 1 in the hole, the injection tube 3 is inserted into the hollow hole 11 and fixed via the screw tube 22 of the bottom plate 2. Then, the tip of the injection cylinder 3 opens toward the through hole of the bottom plate 2. When the inner diameter of the hollow hole 11 of the insert 1 is larger than the outer diameter of the injection cylinder 3,
The plug 6 is interposed between the hollow hole 11 and the injection cylinder 3.
The plug 6 is a cylindrical body whose outer diameter is equal to the inner diameter of the hollow hole 11,
The inside thereof has a structure in which a through-hole equal to the outer diameter of the injection cylinder 3 is provided.

<H> Installation of the ring 43. A cover plate 4 is attached to the end surface on the front side of the insert 1. The ring 43 of the cover plate 4 is fitted into the entrance of the insert hole 5. Then, the insert 1 can reliably maintain the mounting posture inside the insert hole 5.

<Re> Injection of hardening material. A curing material is externally injected through the injection cylinder 3. The hardening material is, for example, a mortar, an adhesive or the like. The hardening material passes through the through hole of the cover plate 4 and fills the inside of the insert hole 5 and the space outside the insert 1. The air that is extruded at the time of filling is discharged from the exhaust port 42. If the exhaust port 42 is located above the insert hole 5,
The state of filling of the hardening material can be confirmed by leaking the hardening material therefrom.

<Nu> In the case of upward drilling. Insert holes 5 in the ceiling of existing concrete structures
Is drilled upward, the hardening material is injected from the exhaust port 42. Then, the hardened material filled up to the innermost
Since it is exposed from, the filling state can be checked.

<R> When newly casting concrete. (Part 1) When newly constructing a concrete structure, the insert 1 is attached to the formwork 7, and then concrete is poured. For that purpose, the intermediate cylinder 8 for temporary fixing is used for the screw of the hollow hole 11 of the insert 1. A screw is formed on the outer periphery of one end of the middle cylinder 8, and the screw of the middle cylinder is formed so as to be screwable with the screw on the inner surface of the hollow hole 11. A flange plate 81 is provided at the other end of the middle cylinder so as to project in the circumferential direction. The outer diameter of the flange plate 81 is formed to be larger than the outer diameter of the insert 1 and a plurality of pin holes 8 are formed.
Open 2 By inserting a pin of a jig for removal into the pin hole 82 and rotating, the middle cylinder 8 can be rotated and removed from the insert 1. A support shaft 9 is protruded at the center of the middle cylinder 8, and a screw is carved at the tip of the support shaft 9. The washer 9 is formed by the screw and the nut 92.
The middle cylinder 8 is attached to the formwork 7 via 1.

<ヲ> When newly casting concrete. (Part 2) A bolt 95 having the same shape as the thread and pitch of the insert 1
Is used, the insert 1 can be directly attached to the formwork 7. (Fig. 5)

<W> When newly casting concrete. (Part 3) The flange of the middle cylinder 8 may be omitted, and the diameter of the middle cylinder 8 may be formed to be substantially equal to the inner diameter of the insertion hole of the insert 1. (FIG. 6) In this case, since there is no flange, the end of the middle cylinder 8 and the end of the insert 1 come into direct contact with the inner surface of the formwork 7.

<F> Mounting on the mold 7. In order to attach the insert 1 to the mold 7, a hole larger than the diameter of the support shaft 9 is opened in the mold 7. When mounting via the bolt 95 (FIG. 5), a hole having a diameter larger than the diameter of the bolt is opened. The support shaft 9 is passed through this hole. (In the case of FIG. 5, the bolt 95 is made to penetrate.) Then, the flange plate 81 is applied to the inside of the formwork 7, and the nut 92 is attached to the support shaft 9 via the washer 91 on the outside of the formwork 7 and tightened. (In the case of FIG. 5, it is fastened by the bolt 95.) As a result, the insert 1 can be attached in the state orthogonal to the inside of the formwork 7. Thereafter, if concrete is poured into the inside of the formwork 7, the insert 1 can be installed inside the concrete structure.

<Y> Exposure of the end face of the insert. Regardless of whether the insert 1 is installed on an existing concrete structure or the insert 1 is installed on a newly constructed concrete structure, the surface 12 of the insert 1 is exposed on the surface of the structure. .

<T> The middle cylinder 8 is pulled out. In the method of screwing the intermediate cylinder 8 for temporary fixing into the inside of the insert 1 and fixing it to the formwork 7, it is necessary to pull out the intermediate cylinder 8 from the insert 1 and disassemble it after the concrete hardens. For that purpose, the following method is adopted. As shown in FIG. 6, a flat portion 93 is formed by cutting both sides of a part of the screw outside the support shaft 9. The middle cylinder 8 can be pulled out from the insert 1 by holding the flat portions 93 on both sides with a wrench or the like and applying rotation. Alternatively, as shown in FIG. 7, the support shaft 9 is a normal bolt, and a pin hole 82 is opened in the end surface of the middle cylinder 8. After the concrete is hardened, the leg of the special-purpose tool for dismantling is inserted into the pin hole 82 to give rotation, and the insert 1 to the middle cylinder 8
Pull out. Alternatively, the screw of the support shaft 9 and the screw of the middle cylinder 8 are engraved in opposite directions. Then, just by turning the nut 92 to one side, the middle cylinder 8 can be rotated and pulled out of the insert 1.

[0024]

As described above, the method for mounting the insert according to the present invention has the following effects. <A> The surface 12 of the insert 1 is exposed on the surface of the concrete structure. For this reason, the position and diameter of the insert 1 are clear as compared with the conventional method, and the working efficiency is improved. <B> A bolt B is attached to the insert 1 as shown in FIG. 9, and a member such as a decorative board or a bracket C is attached via the bolt B for the purpose. In that case, in the case of the insert 1 (lower in FIG. 9) mounted by the method of the present invention, the bracket C or the like can be mounted in a state of directly contacting the surface 12 of the insert 1. Therefore, it is advantageous for the bending and the shear force acting on the bolt B. On the other hand, the insert attached by the conventional method (FIG. 9)
In (b), the mounting of the bracket C is considerably far from the surface of the insert, which is clearly disadvantageous against bending and shear acting on the bolt B. <C> Even if the insert 1 is installed at the back of the concrete structure as in the related art, or the surface is exposed as in the method of the present invention, almost the same tensile strength can be secured. <D> Parts other than the insert 1 are economical because they can be reused after being removed.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of an attached state of an insert 1 of the present invention.

FIG. 2 is an exploded view of an attached state of the insert 1. FIG.

FIG. 3 is a cross-sectional view of a mounted state.

FIG. 4 is an explanatory view of a state in which the insert is attached to a mold by a flanged middle cylinder.

FIG. 5 is an explanatory view of a state in which the insert is attached to a mold by bolts.

FIG. 6 is an explanatory view showing a state in which the insert is attached to a mold by a middle cylinder without a flange.

FIG. 7 is an explanatory view showing a state in which an end face of an insert and a middle cylinder is exposed from a structure.

FIG. 8 is an explanatory view showing a state where an end face of an insert is exposed on a surface of a concrete structure.

FIG. 9 is a diagram showing a comparison of mounting states.

FIG. 10 is an explanatory view of an insert attached by a conventional method.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E125 AA70 AE01 AE04 AG13 AG60 BA04 BA33 BB08 BB16 BB19 BB24 BB30 BB32 BB33 BC09 BD01 BD06 BE07 BF04 CA03 CA19

Claims (2)

[Claims] An insert is formed by engraving a screw on an inner surface of a hollow hole of a hollow cylindrical body, a bottom plate having a leg protruding and a through hole is attached to one end of the insert, Insert the injection tube inside, open the tip of the injection tube toward the through hole of the bottom plate, attach a lid to the front end of the insert, and project a ring on one surface of this lid, Drilling an insert hole in the concrete structure, setting the dimensions of the bottom plate legs so that the front end face of the inserted insert matches the surface of the concrete structure,
And, set the outer diameter of the ring of the lid equal to the inner diameter of the insert hole, insert the insert into the insert hole, insert the ring of the lid into the insert hole and fix it. A method of mounting an insert by injecting a solidifying material inside the inside of the insert and outside the insert. 2. An insert is formed by engraving a screw on the inner surface of a hollow hole of a hollow cylindrical body, fixing one end of a support shaft via a screw on the inner surface, and inserting the insert with the other end of the support shaft. Is mounted on the formwork, and then concrete is poured into the formwork.