JP2000297477A - Member for insert instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To close the member for a form and install it in good quality without generating mounting forgetting by providing an annular projection on the circumference of a contact face with a holding tool forming the insertion hole of a fixing tool on a concrete structure. SOLUTION: The connection part 22b of a holding tool 22 is connected to the fixing hole 20a of an insert body 20, the small diameter end side of the body part 22a of the holding tool 22 is fitted on a recess part 20c, and the insert body 20 and the holding tool 22 are integrated. Next, a screw part 23 is inserted in the hole 26a of a form 26 from the inside, a butterfly nut 24 is tightened, and concrete is cast in the inside of the form 26 in a state the insert body 20 is fixed through the holding tool on the inside of the form 26. An annular projection 22d is formed on the circumference of a contact face with the form 26 in the flange part 22c of the holding tool 22. Thereby, the projection part closes a gap with the form, concrete does not intrude in the gap, and when removing the form, a concrete structure does not get out of shape.

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 fixing a member to be fixed to a concrete structure, and more particularly to a member for an insert device used for manufacturing 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 bolt used as a male member. The insert body is embedded in a concrete structure in advance, and 2. Description of the Related Art A configuration in which a bolt is screwed into a screw hole of a main body to be connected is widely known.

However, in a conventional insert device, since the insert main body is made of metal such as iron, the insert main body is corroded within a short period of time in a concrete structure and deteriorates not only the insert main body but also the concrete structure. Oops.

[0004] Therefore, conventionally, for example, the actual fairness 2-800
As shown in Japanese Patent Application Publication No. 2 (1999), there has been an insert body formed by a body part made of ceramics and a sleeve forming a bolt insertion hole. That is, in FIG.
The insert main body 1 has a main body 2 having a screw hole 2a which is screwed to a screw 4a of a bolt 4 used as a male member.
And a sleeve 3 provided coaxially with the main body 2 and forming an insertion hole 3a for the bolt 4. The main body 2 is formed of ceramics. 5 is a cap covering the screw hole 2a. Then, the insert body 1 is fixed and concrete is poured in a state where one end of the sleeve 3 is in contact with the inside of a mold (not shown), and the insert body 1 is embedded in the concrete structure 6.

However, in the above-mentioned conventional insert device, concrete enters into a small gap between the formwork and the sleeve 3 at the time of casting concrete, and concrete that enters the gap when the formwork is removed is also removed. The concrete structure 6 which was removed and integrated with the concrete in the gap at the periphery of one end of the sleeve 3 lost its shape. Therefore, a countermeasure as shown in Japanese Utility Model Publication No. 5-6326 has conventionally been taken.

FIG. 5 is a cross-sectional view of a member for an insert device disclosed in Japanese Utility Model Publication No. 5-6326, in which an insert body 10 is used as a female member and a screw member and a screw of a bolt used as a male member. A main body member 11 made of ceramics having a screw hole 11a to be connected;
And a concrete sleeve 12 which is provided coaxially and forms an insertion hole 12a for a bolt. Reference numeral 13 denotes a seal covering one end of the screw hole 11a of the main body 11, and the cast concrete is used to cover the screw hole 11a.
It is provided so that it does not flow into the inside.

In order to bury the insert body 10 in a concrete structure as described above, the sleeve 12 and the main body 11 are arranged inside the mold 15 via a rubber packing 16, and the surface of the mold 15 is To formwork 15 and packing 1
6, the screw body 14a of the bolt 14 inserted into the insertion hole 12a of the sleeve 12 is screwed into the screw hole 12 of the main body 11, thereby fixing the insert body 10 inside the mold 15 and Concrete is poured inside, and after the concrete is solidified, the bolts 14 and the formwork 15 are removed.
Thereby, the insert main body 10 is buried in the concrete structure, and the bolt to which the fixed member is inserted is inserted into the packing 16 and the insertion hole 12a and screwed into the screw hole 11a of the main body member 11, thereby fixing the fixed member. It can be attached to the insert body 10.

The packing 16 serves as a cushioning material when the insert body 10 is tightened to the formwork 15 with the bolts 14 during concrete casting, and prevents the formwork 15 and the sleeve 12 from being damaged. To prevent concrete from flowing into this gap.

[0009]

However, the provision of the packing 16 as described above is troublesome, and the user sometimes forgets to attach the packing 16, and as a result, the insert device cannot be installed with good quality.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can be sealed with respect to a formwork, can be installed without forgetting, and can be installed with high quality. It is an object of the present invention to obtain a member for an insert tool that can be used.

[0011]

According to a first aspect of the present invention, there is provided a member for an insert device, which is embedded in a concrete structure formed by casting concrete in a formwork, and is connected to a fixture. Insert body having a hole for use, and one end is detachably connected to the fixing hole of the insert body, and the other end has a fixing part detachably fixed to the formwork, and fixed to the concrete structure after removal A holder is provided with an insertion hole for the tool, and an annular projection is provided around a contact surface of the holder with the mold.

[0012] The member for an insert instrument according to claim 2 is
A main body having a fixing hole to be buried in a concrete structure formed by casting concrete in the form and coupled with a fixture, one end of which is in contact with the main body, and the other end of which is in contact with the form. A sleeve is provided so as to be in contact therewith and forms a through hole for the fixture, and an annular projection is provided around a contact surface of the sleeve with the mold.

[0013]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1A and 1B are a partial sectional view and a partially enlarged sectional view of a state of use of an insert device member according to a first embodiment, and reference numeral 20 denotes an insert body made of ceramics, the outer peripheral surface of which is a curved surface. It is formed in the shape of a barrel. In the center of the insert body 20, a fixing hole (screw hole) 2
0a is provided therethrough, and the diameter of both ends of the insert main body 1 is different. The outer periphery near the large-diameter end is a detent 20b comprising a notch cut in parallel to the axis up to a maximum diameter portion 20d. Are provided at one or more locations. Also,
At the small-diameter end of the insert body 20, a concave portion 20c having a large diameter is provided coaxially with the fixing hole 20a.

Reference numeral 21 denotes a seal attached to the large-diameter end of the insert body 20, which seals one end of the fixing hole 20a. Reference numeral 22 denotes a coupling portion (screw hole) 2 which is coupled (screw-fit) with the fixing hole 20a on the small-diameter end side of the tapered main body portion 22a.
2b is provided, and a collar 22c is provided on the large-diameter end side. The holder 22 is formed of a resin such as polyethylene which does not easily adhere to concrete, or a release material or a resin is applied to the surface. It is made of resin or metal whose surface is treated so as to be hard to adhere to concrete. 23 is a flange 22 of one end of the holder 22.
The screw part 23 is fixed to the c side, and the screw part 23 is formed in the hole 2 of the mold 26 so that the insert body 20 and the holder 22 are located inside the mold 26 used for concrete casting.
6a, the holder 22 is fixed to the formwork 26 by tightening the wing nut 24. Therefore, the fixing portion 25 is formed by the screw portion 23 and the wing nut 24. An annular protruding portion 22d is formed around the contact surface of the flange 22c of the holder 22 with the formwork 26.

Next, a method for manufacturing an insert device using the above-described insert device member will be described.
First, the connecting portion 22b of the holder 22 is inserted into the insert body 20.
Are inserted into the fixing holes 20a from the small-diameter end side of the insert body 20, and the small-diameter end side of the main body 22a of the holder 22 is fitted into the recess 20c, so that the insert body 20 and the holder 22 are integrated. Next, the screw portion 23 is connected to the mold 2
6 through the hole 26a from the inside to the outside.
The insert body 20 is fixed to the inside of the formwork 26 via the holder 22 by tightening the wing nut 24. Then, in this state, the form 26
Pour concrete into the inside of the (pour).

Next, as shown in FIG. 2, after the concrete is solidified into a concrete structure 28, the wing nut 24 is removed to remove the formwork 26, and the holder 22 is rotated to insert the insert body. 20 and concrete structure 28
Then, the fixture insertion hole 29 is formed from the surface of the concrete structure 28 to the insert main body 20. Here, a fixture (bolt) 31 is inserted into the hole 30a of the fixed member 30, and the fixture 31 is further inserted into the fixture insertion hole 2
9 is fixed to the concrete structure 28 by inserting (screw-in) the coupling portion (screw portion) 31 a into the fixing hole 20 a of the insert body 20.

In the first embodiment, the holder 2
An annular protruding portion 22d is formed around the contact surface of the second flange portion 22c with the formwork 26, and the sealing effect of the protruding portion 22d causes the space between the holder 22 and the formwork 26 during concrete casting. Is prevented from entering concrete, and when the formwork 26 is removed, the concrete structure 28 around the flange 22c does not lose its shape, and the insert device can be installed with high quality. In addition, since there is no need to particularly provide a packing, the user does not forget to attach the packing, and the installation work is simplified.

The fixing hole 20 of the insert body 20
a may be a fitting hole instead of a screw hole, and the fixing tool 31 may be a rod-shaped member instead of a bolt. Instead of the seal 21, a plug-shaped member that fits into the fixing hole 20a may be used. Second Embodiment FIG. 3 shows a partial cross-sectional view of a member for an insert device according to a second embodiment in a use state.
And the like are abutted sleeves, and the bolt 33 is
6 through the hole 26a and the sleeve 32,
11 is screwed into the fixing holes 2a, 11a, etc., whereby the mold 26 is fastened to the other end of the sleeve 32, and the other end of the sleeve 32 is brought into contact with the mold 26. Sleeve 32
A through hole 32a for a fixing tool is formed on the inner periphery of the sleeve 32. An annular projection 3 is formed around the contact surface of the sleeve 32 with the formwork 26.
2b is formed.

In the first embodiment, the projection 22d is provided on the holder 22 which is removed after the concrete is cast. In the second embodiment, the sleeve 3 which remains after the concrete is cast is provided.
2, a protruding portion 32b is formed. When the concrete is cast, the protruding portion 32b seals the gap with the formwork 26, and concrete does not enter the gap. Therefore, when removing the formwork 26, the concrete structure 28
Therefore, the insert device can be installed with high quality. In addition, the installation of the packing is not required, so that the packing is not forgotten to be attached, and the installation work is facilitated.

[0020]

As described above, according to the present invention, an annular projection is formed around the contact surface of the holder or the sleeve with the mold, and this projection is formed with the mold when casting concrete. The gap is closed so that concrete does not enter this gap. Therefore, the concrete structure does not lose its shape when the mold is removed, and the installation of the insert device can be performed with high quality. In addition, the installation of the packing is not required, so that the packing is not forgotten to be attached, and the installation work is facilitated.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a used state of a member for an insert device according to a first embodiment of the present invention, and a partially enlarged view thereof.

FIG. 2 is a cross-sectional view of an insert device installed using the member for an insert device according to the first embodiment.

FIG. 3 is a partial cross-sectional view showing a use state of a member for an insert device according to a second embodiment.

FIG. 4 is a cross-sectional view of a conventional insert device.

FIG. 5 is a cross-sectional view showing a use state of a conventional member for an insert device.

[Explanation of symbols]

 2, 11 ... body part 2a, 11a, 20a ... fixing hole 3, 12, 32 ... sleeve 3a, 12a, 29, 32a ... fixing tool insertion hole 4, 14, 33 ... bolt 6, 28 ... concrete structure 15, 26 ... form frame 20 ... insert body 22 ... holder 22b ... coupling part 22d, 32b ... protruding part 25 ... fixing part 30 ... fixed member 31 ... fixing tool

Claims (2)

[Claims] 1. An insert body embedded in a concrete structure formed by casting concrete in a formwork and having a fixing hole to be coupled to a fixture, and one end is attached to and detached from the fixing hole of the insert body. A holding part having a fixing part which is freely connected and is detachably fixed to the formwork at the other end, and which has a through hole for the fixing means formed in the concrete structure after removal; A member for an insert tool, wherein an annular protrusion is provided around a contact surface with the tool. 2. A body buried in a concrete structure formed by casting concrete into a formwork and having a fixing hole for coupling with a fixture, one end of which is in contact with the body, and For an insert instrument, the sleeve is provided so that an end thereof is in contact with a mold, and a sleeve is formed to form an insertion hole of a fixture, and an annular protrusion is provided around a contact surface of the sleeve with the mold. Element.