JPH0280732A - Insert - Google Patents

Abstract

PURPOSE:To prevent the intrusion of concrete into the hollow section of a hollow body by inserting an elastic body into the hollow section of the hollow insert body, an inner circumferential surface of which has a female screw, and compressing and deforming the elastic body. CONSTITUTION:A hollow insert body 11 is installed onto the top face of a formwork 2, an elastic body 20 is inserted into the hollow section of the main body 11, and a cover body 30 is placed onto the top face of the elastic body 20. When a nail 3 is driven into the formwork 2 while penetrating the cover body 30 and the elastic body 20, the elastic body 20 is compressed and deformed, and the elastic body 20 is pushed open in the lateral direction in the main body 11. A clearance formed among the main body 11 and the formwork 2 and the cover body 30 is clogged by the elastic body 20, thus preventing intrusion into the hollow section of the main body 11 of placed concrete (c).

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an insert that is buried in concrete and used for suspending various appliances on a ceiling surface. The present invention relates to an insert that prevents concrete from entering the hollow part of the hollow insert body during pouring.

[Conventional technology]

When a general insert with a cylindrical main body is fixed to a formwork and concrete is poured, the concrete enters the hollow part of the insert through the gap between it and the formwork and forms on the inner circumferential surface. In some cases, the part of the internal thread that was installed was blocked by concrete.

In addition, the present inventor has developed a hollow insert body with a structure in which a wire is spirally wound, and has filed a patent application regarding this. When pouring concrete into the hollow part of the hollow insert body, concrete may enter the hollow part of the hollow insert body through the gaps that occur between the hollow insert body and the formwork and lid, or between the wire rods that are placed above and below each other and make up the hollow insert body. There is.

[Problem to be solved by the invention]

The present invention provides a hollow insert for pouring concrete by fixing a general insert having a cylindrical hollow insert body or a hollow insert body having a spirally wound wire rod to a formwork. This was done to prevent concrete from entering the hollow part of the main body.

[Means to solve the problem]

The means adopted by the present invention to solve the above problems is to insert an elastic body into the hollow part of the hollow insert main body, and to compress and deform the elastic body when fixing it to the formwork.

[Action of the invention]

In the invention according to claim 1, when the elastic body is inserted into the hollow part of the hollow insert body having the cylindrical body part, when a nail or the like is driven into the formwork by passing through the elastic body, the elastic body is compressed and deformed.

Therefore, each gap created between the hollow insert main body and the mold and the lid is closed by the compressively deformed elastic body. Therefore, it is possible to prevent concrete from entering the hollow portion of the hollow insert body.

In addition, in the invention according to claim 2, when an elastic body is inserted into the hollow part of the hollow insert main body in which the wire is tightly wound in a spiral manner, and the nails are driven into the formwork by penetrating the elastic body. , the elastic body is compressed and deformed and expanded laterally inside the hollow insert body, and the female thread formed on the inner circumferential surface of the hollow insert body is closed by the elastic body, and the formwork is inserted through the nails. The hollow insert main body is integrally attached to the elastic body fixed to the elastic body.

When concrete is poured in this state, the female thread on the inner peripheral surface of the hollow insert body is blocked by the elastic body, so the hollow insert body can be inserted from between the wire rods that go up and down in the assembly that makes up the hollow insert body. It is possible to prevent concrete from entering the hollow part, and at the same time, it is also possible to prevent concrete from entering the hollow part of the hollow insert main body through the gaps created between the hollow insert main body and the formwork and lid. can. When the formwork is removed after the concrete has hardened, the elastic body that has been inserted into the hollow part of the hollow insert body in a compressed state returns to its original shape and is pulled out from the hollow part of the hollow insert body.

In the case of any hollow insert body, concrete will not enter the hollow part and harden, so the male thread of the hanging rod can be screwed into the female thread provided on the inner peripheral surface of the hollow insert body without any problem. be able to.

[Example] An insert A1 according to the invention set forth in claim 1 is shown in FIGS. 1 to 4.

Insert) A+ is a cylindrical hollow insert body 11
, an elastic body 20 to be inserted into the hollow part of the hollow insert body 11, and a lid body 30 for covering the upper surface of the elastic body 20 and closing the opening at the upper end of the hollow insert body 11. .

The inner peripheral surface of the cylindrical hollow insert body 11 has a female thread l.
A flange 11b is formed at the upper end of the flange 11b.
is provided.

As shown in FIG. 1, the elastic body 20 inserted into the hollow part of the hollow insert body 11
It has a cylindrical shape with an outer diameter corresponding to the inner diameter of 1.

Further, the lid body 30 is intended to cover the upper surface of the elastic body 20 and close the opening at the upper end of the hollow insert body 11, and is intended to close the opening at the upper end of the hollow insert body 11.
Since it is necessary to pull it out from the hollow part of the hollow insert main body 11 together with the hollow insert main body 11, its outer diameter is slightly smaller than the inner diameter of the hollow insert main body 11.

Then, as shown in FIG. 1, the hollow insert main body 11 is installed on the upper surface of the formwork 2, and the hollow insert main body 11
The elastic body 20 is inserted into the hollow part of the elastic body 20, and the lid body 30 is placed on the upper surface of the elastic body 20.

The volume of the elastic body 20 in the example is the same as that of the hollow insert body 11.
Therefore, when the elastic body 20 is not compressed, the height of the elastic body 20 is higher than that of the hollow insert body 11.

When the nail 3 is driven into the formwork 2 through the lid 30 and the elastic body 20, the elastic body 20 is compressed and deformed by the lid 30, and the hollow insert body 11 is compressed and deformed, as shown in FIG. The elastic body 20 is laterally expanded inside, and the hollow insert main body 11 is attached to the elastic body 20 fixed to the formwork 2 via the nails 3.

When concrete C is poured in this state, the elastic body 20 inserted into the hollow part of the hollow insert main body 11 is compressively deformed, so that there is a gap between the hollow insert main body 11, the formwork 2, and the lid body 30. Since each gap formed is closed by the compressively deformed elastic body 20, it is possible to prevent the concrete C from entering the hollow part of the hollow insert main body 11 during pouring of the concrete C.

As shown in FIG. 3, when the formwork 2 is removed after the concrete C has hardened, the elastic body 20 that was inserted into the hollow part of the hollow insert body 11 in a compressed state returns to its original shape, and the lid body 30 and The hollow insert main body 11 is pulled out from the hollow part of the hollow insert main body 11 as one body, and the hollow insert main body 11 is buried in concrete C.

As shown in FIG. 4, a device (not shown) is attached to the lower end of the hanging rod 4, and a male thread 4a formed on the hanging rod 4 is inserted into the inner peripheral surface of the hollow insert main body 11. The hanging rod 4 is screwed into the internal thread lla formed in the
Attach the various layer fittings to the ceiling surface through the Since the concrete C has not penetrated into the female thread lla formed on the inner peripheral surface of the hollow insert main body 11 and has not hardened, the male thread 4a of the hanging rod 4 can be inserted into the female thread lla formed on the inner peripheral surface of the hollow insert main body 11. It can be screwed onto the lla without any problem.

In addition, in the invention described in claim 1, a female thread may be provided on the inner circumferential surface of the hollow insert body by embedding a nut in the hollow insert body.

5 to 14 show an inserter A2 according to the invention according to claim 2. Note that the same parts as those of the insert A described above will be described with the same reference numerals.

The insert A2 includes a hollow insert main body 10 and an elastic body 20 inserted into the hollow part of the hollow insert main body 10.
and a lid 30 for closing the opening at the upper end of the hollow insert main body 10 over the upper surface of the elastic body 20.

The wire rod 1 shown in FIG. 5 is for forming a hollow insert main body 10, and has a diamond-shaped cross section, and a narrow flat portion 1a is provided on each of its upper and lower surfaces. There is. In the embodiment, in order to improve the adhesion between the wire rods 1 that move up and down when winding the wire rods 1 in a spiral shape,
Although the flat portions 1a are formed above and below the wire rod 1 having a diamond-shaped cross section, it is also possible to use a wire rod having a general diamond-shaped cross section without having the flat portions 1a above and below.

When the wire 1 is spirally wound so that the flat parts 1a of the wire 1 that are placed above and below each other are in close contact with each other without any gaps, a cylindrical hollow insert main body 10 as shown in FIG. 6 is formed.

As shown in FIGS. 7 to 10, the thickness of the wire 1 forming the upper and lower ends of the hollow insert main body 10 gradually becomes thinner toward the ends thereof. Thereby, the upper end surface and the lower end surface of the hollow insert main body 10 can be made substantially planar.

The hollow insert main body 10 is constructed by winding the wire 1 having a diamond-shaped cross section in a spiral manner so that the upper and lower plane parts 1a of the wire 1 are in close contact with each other. Female thread 1 with a pitch equal to the thickness T of 1 (see Figure 8)
0a is formed, and a spiral groove lOb is formed on its outer peripheral surface.

Then, as shown in FIG. 11, the hollow insert main body 10 is installed on the upper surface of the formwork 2, and the hollow insert main body 1
The elastic body 2o is inserted into the hollow part of the elastic body 20, and the lid body 30 is placed on the upper surface of the elastic body 20.

When the nail 3 is driven into the formwork 2 through the lid 30 and the elastic body 20, as shown in FIG.
The elastic body 20 is compressed and deformed, and the elastic body 20 is laterally expanded inside the hollow insert body IO, and the elastic body 20 bites into the internal thread 10a formed on the inner peripheral surface of the hollow insert body 10. So, this female thread t
Oa is closed, and the hollow insert main body IO is attached to the elastic body 20 fixed to the formwork 2 via the nails 3.

When concrete C is placed in this state, the concrete C enters the groove 10b on the outer peripheral surface of the hollow insert main body 10 and prevents the insert A2 from being removed. Since the female thread lOa formed on the inner circumferential surface of the hollow insert body 10 is closed by the elastic body 20, when concrete C is poured, there is a gap between the upper and lower wire rods 1 constituting the hollow insert body 10. It is possible to prevent the concrete C from entering the hollow part of the hollow insert main body 10.

As shown in FIG. 13, when the formwork 2 is removed after the concrete C has hardened, the hollow insert body 10 is compressed.
The elastic body 20 inserted into the hollow part is restored to its original shape, is pulled out from the hollow part of the hollow insert body 10 together with the lid body 30, and the hollow insert body 10 is buried in concrete C. Then, as shown in FIG. 14, when the male thread 4a formed at the upper end of the hanging rod 4 is screwed into the female thread 10a formed on the inner circumferential surface of the hollow insert body 10, the hanging rod 4 is fixed. Various appliances are attached to the ceiling surface through this.

15 to 20 show another inserter A3 according to the invention according to claim 2.

The hollow insert body 10゛ of insert A3 is the first
As shown in FIGS. 5 to 18, when winding the wire 1 in a spiral shape, the wire 1 is partially deviated outward from the normal winding path. A female thread 10'a is provided on the inner circumferential surface of the hollow insert main body 10', and a protrusion 5 is formed on a portion of the outer circumferential surface. When the wire 1 is wound to form the hollow insert main body 10'' in this manner, a void 6 is formed in the portion where the protrusion 5 is provided.

To fix this hollow insert body 10'' to the formwork 2, as shown in FIG. 18, the elastic body 20 is inserted into the hollow part of the hollow insert body 10'' installed on the formwork 2, When the lid 30 is placed on the upper surface of the elastic body 20 and the nail 3 is driven into the formwork 2 through the lid 30 and the elastic body 20, as shown in FIG. The elastic body 20 is laterally expanded and bites into the female thread 10'a on the inner circumferential surface of the hollow insert main body 10°, and the hole formed in the part of this female thread 10'a and the part of the protrusion 5 is removed. Both of the holes 6 are closed by the elastic body 20, and the hollow insert main body 10'' is attached to the elastic body 20 fixed to the formwork 2 via the nails 3.

When concrete C is poured in this state, between the upper and lower wire rods 1 constituting the hollow insert body 10'',
It is possible to prevent the concrete C from entering the inside of the hollow insert main body 10'' from both the space 6 and the hollow space 6 described above.

When the formwork 2 is removed after the concrete C has hardened, the elastic body 20, which had been inserted into the hollow part of the hollow insert body 10'' in a compressed state, is integrated with the lid body 30 and the hollow part of the hollow insert body 10'' is removed. The hollow insert main body 10' is pulled out from the concrete C and buried in the concrete C.

Hollow insert body 10 buried in concrete C
Since both the groove portion 10''b formed on the outer circumferential surface and the protrusion 5 function as an undercut portion, the force against the tensile force applied to the hollow insert body 10'' becomes even greater.

Further, in any of the above-described embodiments, since the elastic body 20 inserted into the hollow insert main body 10.10' is compressed and deformed, the hollow insert main body 10.1
Even if a gap occurs between 0' and the formwork 2 or the lid 30, this gap is closed by the compressively deformed elastic body 20, and it is also possible to prevent the concrete C from entering from this part. .

In addition, when compressing the elastic body 20 by driving the nail 3,
Instead of using the lid body 30 as in each of the above embodiments, a nail with a head of a size corresponding to the inner diameter of the hollow insert body 10. The elastic body 20 may be compressed.

〔Effect of the invention〕

In the present invention, by inserting an elastic body into the hollow part of the hollow insert body and compressing and deforming it, each gap created between the hollow insert body, the formwork, and the lid body can be closed. It is possible to prevent concrete from entering the hollow part of the hollow insert body during installation.

This prevents concrete from entering the threaded part of the female thread of the hollow insert body and causing it to harden, so the female thread of the hollow insert body and the male thread of the hanging persimmon can be screwed together without any problem. .

[Brief explanation of the drawing]

1 to 4 are diagrams for explaining the invention according to claim 1, and FIG. 1 shows the insert A1 in the formwork 2.
Figure 2 is a vertical cross-sectional view of insert A after concrete C has been placed, and Figure 3 is a vertical cross-sectional view of insert A with formwork 2 removed after concrete C has hardened. FIG. 4 is a longitudinal sectional view of the hollow insert main body 11 in a state where the hanging rod 4 is screwed into the hollow insert main body 11 buried in concrete C. 5 to 20 are diagrams for explaining the invention according to claim 2, in which FIG. 5 is a perspective view of the wire 1, FIG. 6 is a perspective view of the hollow insert main body 10, Figure 7 shows
A plan view of the hollow insert main body 10, FIG. 8 is a sectional view taken along the X+Xr line in FIG. 7, FIGS. 9 and 10 are partial sectional views taken along the X2X2 line and the X3-X3 line in FIG. Fig. 11 is a longitudinal cross-sectional view of the insert A2 installed on the formwork 2, Fig. 12 is a longitudinal cross-sectional view of the insert Az after pouring concrete C, and Fig. 13 is a longitudinal cross-sectional view of the insert A2 installed on the formwork 2. FIG. 14 is a vertical cross-sectional view of the hollow insert main body 10 with the formwork 2 removed after curing C, and FIG. 14 is a vertical cross-sectional view of the hollow insert main body 10 buried in concrete C with the hanging rod 4 screwed together , FIG. 15 is a perspective view of the hollow insert main body 10'', and FIG.
Figure 7 is a cross-sectional view taken along the line Y-Y in Figure 16, Figure 18 is a longitudinal cross-sectional view of the insert Az installed on the formwork 2, and Figure 19 is a cross-sectional view of the insert Az after pouring concrete C. insert A
3 and FIG. 20 are vertical cross-sectional views of a state in which a hanging rod 4 is screwed into a hollow insert main body lO" buried in concrete C. Reference numerals of main parts constituting the present invention The explanation is as follows: AI, A2.A3: Insert 1: Wire 10.
10', 11: Hollow insert body 10a 10'a,
11a: Female thread 20: Elastic body Patent applicant Mirai Kogyo Co., Ltd. Figure 17

Claims (2)

[Claims] (1) A hollow insert body with a female thread on the inner peripheral surface of the cylindrical body part, and a hollow insert body that is inserted into the hollow part of the hollow insert body and compressed and deformed to prevent concrete from entering the hollow part. An insert characterized by having an elastic body. (2) By tightly winding the wire in a spiral,
A hollow insert body having a female thread provided on the inner circumferential surface, and an elastic body for preventing concrete from entering the hollow part by inserting it into the hollow part of the hollow insert body and compressing and deforming it. Features an insert.