JPH11107526A - Concrete embedded body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a removal work by forming an embedded body, which is preset in a mold for forming a recessed part in placed concrete, of a solid rubber and by eliminating any necessity of a hammer, etc., in removing the embedded body after the hardening. SOLUTION: A fixing metal 2 and a magnet 7 are attached to a concrete embedded body A constituted of hard rubber, etc., and, when there is an embedded bolt, etc., a hole 6 is provided in that place so that a temporary locking nut 5 is fitted therein. The embedded body A is fixed to a prescribed position in a metal mold for forming a foundation, etc., concrete is placed in the mold, and the mold is removed after hardening the concrete. Secondly, the embedded body A is detached from the concrete so as to form a recess. It is easily detached without any use of a tool such as a hammer and the embedded body A can be reused. Only the temporary locking nut 5 can be replaced. This constitution can efficiently implement the detaching work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete buried body for forming a recess for mounting a large metal fitting or the like on an outer peripheral surface of a concrete foundation or the like.

[0002]

2. Description of the Related Art A conventional embedded concrete body is constructed by mounting a magnet on a metal box-shaped main body having a hole for holding an embedded bolt. . Then, when setting the concrete embedded body in the metal formwork, magnets are magnetically attached to the metal formwork with the opening side of the box-shaped main body of the concrete embedded body in contact with the metal formwork, and the holding hole is To hold the buried bolt. After the concrete was cast and the metal form was removed, the concrete embedded body was separated from the concrete structure using a hammer or the like.

[0003]

However, when the concrete embedded body is forcibly separated from the concrete structure using a hammer or the like, the box-shaped main body is plastically deformed at the intermediate portion, and the box-shaped main body is deformed with the deformation. There has been a problem that the magnet is detached from the box-shaped main body and cannot be reused. Also,
When placing concrete, ready-mixed concrete enters the box-shaped main body from the opening side of the box-shaped main body and cannot be separated from the concrete structure, and furthermore, there is also a problem that the embedded bolt is loosened by the impact when separating. there were. The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to prevent the magnet from being deformed or falling off by separating work from a concrete structure, Get in,
An object of the present invention is to provide a concrete embedded body in which an embedding bolt is not loosened, and furthermore, an operation of separating the embedding bolt from a concrete structure is facilitated.

[0004]

In order to achieve the above object, the concrete embedded body according to the first aspect of the present invention is set on a mold before placing concrete, and is removed and hardened after placing concrete. In a concrete embedding body for forming a predetermined recess in a concrete surface, an embedding part in concrete is formed of a rubber material.

[0005] A concrete embedded body according to a second aspect of the present invention is the concrete embedded body according to the first aspect, characterized in that a concrete embedding portion is solid.

A concrete embedded body according to a third aspect of the present invention is the concrete embedded body according to the first or second aspect, wherein a holding portion for an embedded bolt is formed.

According to a fourth aspect of the present invention, there is provided the concrete embedded body according to the third aspect, wherein the holding section is formed by providing a female screw section formed of a rubber material in the embedded section. Is what you do.

According to a fifth aspect of the present invention, there is provided a concrete embedded body according to the third aspect, wherein a rubber temporary fixing nut to be screwed with the male thread portion of the embedding bolt and the temporary fixing nut are fitted. And a nut mounting hole provided in a portion to be embedded in concrete, and a holding portion is formed.

According to a sixth aspect of the present invention, there is provided a concrete embedded body according to any one of the first to fifth aspects, wherein a magnet is disposed on a contact surface of the embedded part with the formwork. It is characterized by the following.

A concrete embedded body according to a seventh aspect of the present invention is the concrete embedded body according to the sixth aspect, wherein the magnet is a rubber magnet having flexibility.

According to an eighth aspect of the present invention, there is provided the concrete embedding body according to any one of the first to seventh aspects, wherein a fixing bracket for fixing the embedding portion to the mold is provided. It is assumed that.

According to a ninth aspect of the present invention, there is provided the concrete embedded body according to any one of the first to eighth aspects, wherein a clue for separating the embedded part in the concrete from the hardened concrete is provided. It is characterized by the following.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the concrete embedding body A includes an embedding part 1 for concrete, a fixture 2, and a holding part 4 for holding an embedding bolt 3. As shown in FIG. 3, the concrete embedded body A is set in a metal formwork (an example of a formwork) B,
Further, after the concrete is cast, as shown in FIG. 7, a recess D is formed in the concrete foundation C at the embedded trace of the concrete embedded body A by being separated from the concrete foundation C. As shown in FIGS. 1 and 3, the embedding portion 1 is a molded body of a hard rubber material, and is formed in a solid and flat plate shape. In addition, as a rubber material, for example,
Natural rubber and various synthetic rubbers are conceivable.

As shown in FIG. 1, the holding portion 4 of the embedded bolt 3 has a temporary fixing nut 5 fitted to the male screw portion 3a of the embedded bolt 3, and a nut fitting hole for fitting the temporary fixing nut 5 therein. And a nut fitting hole 6.
Is formed below the embedded portion 1 and penetrates in the thickness direction of the embedded portion 1. As shown in FIGS. 1 and 4, the temporary fixing nut 5 is a molded body of a hard rubber material like the embedded portion 1, and includes a large diameter portion 5 a and a small diameter portion 5 b. As shown in FIGS. 1 and 4, a female screw portion 5 c is formed in the large diameter portion 5 a of the temporary fixing nut 5, and the temporary fixing nut 5 is formed.
A small hole 5d is formed in the small diameter portion 5b, a step 5e is provided between the large diameter portion 5a and the small diameter portion 5b, and a detent 5f is projected from the outer periphery of the large diameter portion 5a. I have.

As shown in FIG. 1 and FIG.
The nut fitting hole 6 has a large-diameter hole 6a and a small-diameter hole 6b connected to each other via a locking step 6c, and has a fitting groove 6d provided around the large-diameter hole 6a. And when the temporary fixing nut 5 is attached to the nut fitting hole 6 of the embedding part 1,
The large diameter portion 5a of the temporary fixing nut 5 fits into the large diameter hole 6a of the nut fitting hole 6 of the embedding portion 1, and the small diameter portion 5b of the temporary fixing nut 5 fits into the small diameter hole 6b of the nut fitting hole 6. Including
The step 5e of the temporary fixing nut 5 is locked by the locking step 6c of the nut fitting hole 6, and the rotation preventing 5f of the temporary fixing nut 5 is further secured.
Fits into the fitting groove 6d of the nut fitting hole 6.

As shown in FIG. 1, the surface of the embedding portion 1 of the concrete embedding body A (the surface that comes into contact with the metal form B)
Is provided with a plurality of magnets (permanent magnets) 7 at appropriate intervals in the vertical direction. The magnet 7 is a molded product of a rubber magnet in which a magnet is mixed into a hard rubber material, and has a rectangular cross section and is formed in a horizontally long rod shape. As shown in FIG. 3, a fitting recess 8 is provided on the surface of the embedding portion 1 of the concrete embedding body A, and the magnet 7 is fitted into the fitting recess 8 via an adhesive layer, and the surface of the embedding portion 1 is formed. And the surface of the magnet 7 are flush with each other. Therefore, the magnet 7 is also deformed by the deformation of the embedded portion 1, so that the magnet 7 is
Does not fall out of the fitting recess 8.

At the upper end of the embedding portion 1, there are provided fixing brackets 2 for fixing the embedding portion 1 to the metal form B. Bolts 10 are provided on the right and left edges of the fixing bracket 2.
A notch 11 is formed for the passage. Fixture 2
Serves as a clue 2A for separating the concrete embedded body A from the concrete foundation C.

Next, the work of attaching the concrete embedded body A thus constructed to the metal form B and separating it from the concrete foundation C will be described. When the concrete embedded body A is set on the metal form B, as shown in FIGS. 2 and 3, the fixture 2 of the concrete embedded body A is overlaid on the upper flange B 1 of the metal form B, and the concrete embedded body A is set. Is magnetized on the inner surface of the metal form B. Further, a bolt 10 is inserted through a bolt hole B2 formed in the upper flange B1 of the metal form B and a notch 11 of the fixing bracket 2, and a nut 12 is tightened to the bolt 10 so that the concrete embedding body A is formed into the metal form. Fix to B.

As shown in FIGS. 3 and 4, the threaded portion 3a of the embedded bolt 3 is screwed into the temporary fixing nut 5 attached to the embedded portion 1 of the concrete embedded body A. When the setting of the concrete embedded body A in the metal form B is completed in this way, concrete is poured into the metal form B, and after the concrete has developed a predetermined strength, the concrete embedded body A is fixed. Bolt 10
-Remove the nut 12 and remove the metal form B.

As shown in FIG. 5, when the concrete embedded body A embedded in the upper side surface of the concrete foundation C is separated from the concrete foundation C, the fixture 2 is held by hand, and as shown by an arrow in FIG. Then, the concrete embedded body A is pulled toward the user. Thereby, as shown in FIG. 6, the embedding part 1 of the concrete embedding body A bends to the near side, and the embedding part 1 is sequentially turned from the top, and finally the concrete embedding body A is separated from the concrete foundation C.

Further, by pulling the embedded concrete body A forward, the female screw portion 5c of the temporary fixing nut 5 is elastically deformed, and the fitting state of the female screw portion 5c of the temporary fixing nut 5 is forcibly released. The locking nut 5 comes off the stud bolt 3. As described above, since the temporary fixing nut 5 can be pulled out from the embedded bolt 3 without turning, the detachment operation of the concrete embedded body A is simplified. Since the step 5e of the temporary fixing nut 5 is locked to the locking step 6c of the nut fitting hole 6, when the concrete embedded body A is separated, the temporary fixing nut 5 is fitted into the nut 1 of the embedded part 1. It does not come off the hole 6.

As shown in FIG. 7, a recess D is formed at the embedded trace of the concrete embedded body A on the side of the concrete foundation C, and a threaded portion of the embedded bolt 3 is formed at the back of the recess D. 3a protrudes. Then, as shown by the two-dot chain line in FIG.
Is set, and the screw portion 3a of the embedding bolt 3 is inserted into the bolt hole 13a formed in the large receiving bracket 13, and is tightened and fixed with a nut.

The temporary fixing nut 5 may be turned and removed from the threaded portion 3a of the embedded bolt 3. That is, a square head is formed in the large diameter portion 5a of the temporary fixing nut 5, and the temporary fixing nut 5 is turned using a spanner to remove the temporary fixing nut 5 from the screw portion 3a of the embedded bolt 3. For this purpose, the fitting depth of the detent 5f into the fitting groove 6d, the size of the detent 5f, and the like are set to appropriate dimensions, and the temporary fixing nut 5 is forcibly turned with a spanner, so that the temporary fixing nut 5 5f is elastically deformed so as to come off from the fitting groove 6d of the nut fitting hole 6.

8 to 10 show another embodiment of the concrete embedded body, in which the concrete embedded body A1 is completely embedded in the concrete structure C1. This concrete embedded body A1
In place of the fixture 2, the concrete embedded body A1
A clue unit 14 is provided for pulling the wire away from the concrete structure C1. The embedding part 1 is formed of a rubber material, and the point where the magnet 7 is provided is the same as the concrete embedding body A described above. Note that the clue unit 14 is configured by arranging a hanging bar 14b for hanging the finger of the hand H in a recessed portion 14a for inserting the finger of the hand H. Therefore, even if the concrete embedded body A1 is completely embedded in the concrete structure C1, FIG.
As shown in FIG. 0, the concrete embedded body A1 can be separated from the concrete structure C1 by hooking the finger of the hand H on the clue unit 14 and pulling the concrete embedded body A1 toward the user.

[0025]

As described above, according to the concrete embedding body of the present invention, since the embedding part in the concrete is formed of the rubber material, it is plastically deformed when it is separated from the concrete structure and cannot be reused. Can be prevented. In addition, since the embedded portion can be gradually pulled away from the concrete structure by turning, the tool does not require a large force to separate it, and a tool such as a hammer is not required.

Further, since the embedding portion in the concrete is made solid, there is no room for the fresh concrete to enter, and even if it is solid, the rubber material can be removed from the concrete structure by elastic deformation.

Since the holding portion of the embedded bolt is formed by providing a female screw portion made of a rubber material in the portion to be embedded in concrete, the holding portion can be pulled out from the embedded bolt when separating from the concrete structure. ,
Therefore, even when embedded in concrete while holding the embedded bolts, it is easy to separate the concrete from the concrete structure, and the workability is improved. Also, since the holding portion of the embedded bolt is formed by a rubber temporary fixing nut to be screwed with the male screw portion of the embedded bolt and a nut mounting hole for fitting the temporary fixing nut, pulling out from the embedded bolt, etc. Even if the female screw portion of the holding portion deteriorates, only the temporary fixing nut needs to be replaced, which is economical.

Since the magnet is formed of a rubber magnet having flexibility, the magnet is also elastically deformed in accordance with the elastic deformation of the embedded portion, so that the magnet does not drop out when being separated from the concrete structure.

Further, since a cue portion is provided for separating from the concrete structure, the separating operation is facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a concrete embedded body according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where the concrete embedding body is set on a metal formwork.

FIG. 3 is a cross-sectional view showing a state where the concrete embedding body is set on a metal formwork.

FIG. 4 is a cross-sectional view showing a state where a buried bolt is held by a holding portion of the concrete buried body.

FIG. 5 is a perspective view showing a state where the concrete embedded body is embedded in a concrete structure.

FIG. 6 is a perspective view showing an operation of separating the concrete embedded body from the concrete structure.

FIG. 7 is a perspective view showing a state in which a recess is formed in the concrete structure by the concrete embedded body.

FIG. 8 is a perspective view showing a state in which a concrete embedded body according to another embodiment of the present invention is embedded in a concrete structure.

FIG. 9 is a cross-sectional view showing a state where the concrete embedded body is embedded in a concrete structure.

FIG. 10 is a perspective view showing an operation of separating the concrete embedded body from the concrete structure.

[Explanation of symbols]

 A Concrete embedded body B Metal formwork (Form) C Concrete foundation C1 Concrete structure D Concave part 1 Embedded part in concrete 2 Fixture 3 Embedded bolt 4 Holding part 5 Temporary fixing nut 6 Nut fitting hole 7 Magnet

Claims (9)

[Claims] 1. A concrete embedded body which is set on a formwork before concrete casting and which is formed after the concrete is cast to form a predetermined recess on a hardened concrete surface. An embedded concrete body formed of a rubber material. 2. The concrete embedded body according to claim 1, wherein the embedded section is solid. 3. The concrete embedded body according to claim 1, wherein a holding portion for the embedded bolt is formed. 4. The concrete embedded body according to claim 3, wherein the holding section is formed by providing a female screw section formed of a rubber material in the embedded section. 5. A holding portion is formed by a rubber temporary fixing nut screwed into a male screw portion of an embedded bolt and a nut mounting hole provided in the embedded portion for fitting the temporary fixing nut. The concrete embedded body according to claim 3, characterized in that: 6. The concrete embedding body according to claim 1, wherein a magnet is disposed on a surface of the embedding portion that contacts the formwork. 7. The concrete embedded body according to claim 6, wherein the magnet is a flexible rubber magnet. 8. The concrete embedding body according to claim 1, further comprising a fixing metal for fixing the embedding portion to the formwork. 9. The concrete embedded body according to claim 1, further comprising a cue for separating the embedded part from the hardened concrete.