JPH0544269A - Insert for thermal insulation slab - Google Patents

Abstract

PURPOSE:To set an insert easily and firmly without nailing, on the execution of the work of a thermal insulation slab for simplifying a form, by using the form to be also served as the thermal insulation plate. CONSTITUTION:An insert is composed of a cylindrical bearing section 3 having a cutting edge 2 at the tip and a screw 1a on the outer periphery, a collar section 4 projected from the cylindrical. bearing section 5, and a main body 5 having 2 screw 1b on the inner periphery, to be engaged to be inserted into the cylindrical bearing section 3. The lower section of the collar section 4 of the cylindrical bearing section 3 can be screwed in till a form and thermal insulation plate 6 is penetrated. Accordingly, just by screwing in, the lower section is cut into the form and thermal insulation plate 6, and the section can be set easily and firmly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is particularly embedded in a heat insulating slab such as a floor slab or a ceiling slab of a building provided with a heat insulating plate made of a synthetic resin foam to provide heat insulating properties. The present invention relates to an insert used for attaching a hanging tool or a fixing tool for various pipes such as a gas pipe and a sprinkler pipe.

[0002]

2. Description of the Related Art Conventionally, as an insert, a cylindrical support portion having a flange portion protruding outward in an intermediate portion and a screw threaded on an inner periphery of a lower portion are inserted and locked into the cylindrical support portion from above. It is known that it is composed of a main body.

On the other hand, the general construction of the heat insulating slab will be explained by taking a floor slab, which is a typical example of the heat insulating slab, as an example. A formwork is laid on the supporting work, and a heat insulating plate made of a synthetic resin foam ( This is done by laying (hereinafter referred to as "insulation board"), arranging the bars, and then placing concrete.

The installation of the insert is also carried out together with the construction of the floor slab. Before arranging the reinforcement, a through hole into which a cylindrical support portion can be inserted is made in the laid heat insulating plate, and the flange portion is provided in this through hole. After inserting the lower part of the tubular support part until it contacts the surface of the heat insulating plate, and after nailing the collar part to the formwork in order to prevent the tubular support part inserted in this through hole from falling out or falling down, It is installed by inserting the main body into the tubular support portion.

Concrete is cast on the insert thus installed. The cylindrical support part is for supporting the main body in a state where the upper part of the main body is sufficiently projected on the heat insulating plate, and the upper part of the main body is in a state of being embedded in the cast concrete, after hardening of the concrete, Firmly retained in hardened concrete. Also, when the formwork is removed after the concrete has hardened, the lower part of the main body is exposed under the floor through the through holes of the heat insulating plate.Therefore, when passing various pipes under the floor, use a hanger or a fixing tool on the screw on the inner circumference of the lower part of the main body. The tool can be attached by screwing.

[0006]

However, in the conventional insert, since a through hole must be provided in the heat insulating plate at the time of installation, a tool for that purpose must be prepared, and there is a problem that the installation is troublesome.

Further, since the support portion in the conventional insert is fixed by nailing the collar portion to the formwork, not only is nailing time consuming, but also if the formwork is removed after the concrete is hardened, it will be placed under the floor. Since the tips of the nails are in a protruding state, which is dangerous in operation, it is necessary to bend the protruding nails with a chisel or the like, and there is also a problem in that this post-processing is troublesome.

Particularly on the heat insulating plate, a worker often walks after installing the insert for placing the bar and placing concrete. Due to the vibration and elasticity of the heat insulating plate for this purpose, the support portion inserted into the through hole is formed. Is in a state where it is easy to get out. It is conceivable to omit nailing by firmly fitting the support part to the through hole, but in the above environment it is insufficient for prevention of pulling out, so despite the above problems, nailing is still necessary. The current situation is that we have to rely on it.

On the other hand, the mold is usually disposable and wasteful, and it requires a great deal of labor for its installation and removal. Therefore, in order to solve this problem, the applicant uses a heat insulating plate that also serves as a form (hereinafter referred to as “form and heat insulating plate”) in which a synthetic resin film is laminated and integrated on one surface of the heat insulating plate. I applied for a construction method in which the frame and heat insulating plate is laid directly on the supporting structure with the synthetic resin film side facing down.

However, according to this construction method, there is no formwork for nailing the collar portion when the conventional insert is installed, so that there is a problem that nailing cannot be performed to prevent the support portion from coming off.

The present invention has been made in view of the above-mentioned problems of the prior art, and makes it possible to easily and firmly install the insert in the construction using the above-mentioned mold and heat insulating plate without nailing. The purpose is to

[0012]

For this reason, in the invention of claim 1, as shown in FIG. 1, a screw 1a is cut at least in the outer periphery of the lower part, and when the screw 1a is rotated in the screwing direction. A tubular support portion 3 having a blade 2 having a cutting function at the lower end, a collar portion 4 projecting outward from the tubular support portion 3, and a screw 1b cut at least on the inner circumference of the lower portion, and the tubular shape is applied from above. The main body 5 is inserted and locked in the support portion 3, and the length of the tubular support portion 3 below the flange portion 4 is the length that penetrates the form and heat insulating plate 6 provided in the heat insulating slab. It is used as an insert for a heat insulating slab.

According to the second aspect of the invention, as shown in FIG. 4, the screws 1a,
1b is cut and comprises a main body 5 having a blade 2 at the lower end, which has a cutting function when rotated in the screw-in direction of the screw 1a on the outer peripheral side, and a flange portion 4 protruding outward from the main body 5. The length below 5 of the collar part 4 is the insert for the heat insulation slab which is the length which penetrates the formwork and heat insulation plate 6 provided in the heat insulation slab.

[0014]

In the insert according to claim 1, the cylindrical support portion 3 is provided.
Can be installed by directly screwing into the form and heat insulating plate 6. That is, as the cylindrical support portion 3 rotates, the screw 1a on the outer circumference provides a biting force, and the blade 2 at the tip cuts the form and heat insulating plate 6 necessary for biting. Therefore, it can be installed without forming a through hole particularly in the form and heat insulating plate 6. Further, since it bites into the formwork / heat insulating plate 6 like a screw nail, it is difficult to remove it without rotating it, and it is possible to sufficiently prevent it from coming off without fixing it with nails. Resin film 7
Even if they are laminated, they can be easily cut and cut into them.

The insert of claim 2 is, so to speak, claim 1.
The cylindrical support portion 3 and the main body 5 are integrally formed, and the screw 1a and the blade 2 provided on the main body 5 perform the above-described operation.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS.

This insert includes a cylindrical support portion 3 and a collar portion 4.
And a main body 5. Any of these can be formed of metal or synthetic resin,
At least the main body 5 is preferably made of metal.

The tubular support portion 3 is of a tubular shape having a hollow portion penetrating therethrough, and a screw 1a is cut on the outer periphery of the lower portion of the collar portion 4 which will be described later. Further, at the lower end, a blade 2 that has a cutting function when the cylindrical support portion 3 is rotated in the screw-in direction of the screw 1a is formed.

On the upper portion of the cylindrical support portion 3, a flange portion 4 which projects outward is fixed. A knob 8 is formed on the upper portion of the collar 4. Although the cylindrical support portion 3 and the collar portion 4 in this embodiment are separately formed and then combined and fixed, they may be integrally formed.

The lower half of the main body 5 is hollow, and the screw 1b is cut on the inner circumference of the hollow portion. The main body 5 is inserted into the tubular support portion 3 from above. Further, a protrusion 9 is formed in an intermediate portion of the main body 5, and when the main body 5 is inserted into the tubular support portion 3, the protrusion 9 comes into contact with the upper surface of the tubular support portion 3 and the main body 5 Is to be locked.

As shown in FIG. 1, the insert is
The cylindrical support portion 3 is made to bite into the formwork / insulating plate 6 until the lower surface of the collar part 4 contacts the surface of the formwork / insulating plate 6, and the formwork / insulating plate 6 is penetrated. It is installed by inserting the main body 5 into the above from above. At this time, since the tubular support portion 3 has the screw 1a on the outer periphery and the blade 2 at the lower end, it can be directly screwed into the form and heat insulating plate 6 like a screw nail and attached.

Although the knob portion 8 formed on the collar portion 4 is not essential, it is preferable to provide the knob portion 8 because it serves as a clue at the time of screwing and facilitates the screwing operation.

In the present embodiment, the screw 1a is cut over substantially the entire circumference of the lower portion of the tubular support portion 3 below the collar portion 4. However, the forming range of the screw 1a is the tubular support portion. The cylindrical support portion 3 is provided within a range in which screw-like screwing of 3 is possible.
It is also possible to set a narrow range only in the lower part of.

Further, when the tubular supporting portion 3 is screwed into the form and heat insulating plate 6, chips may be clogged in the tubular supporting portion 3, which is discharged by the subsequent insertion of the main body 5. Can be made

After the insert is installed in this manner, the heat insulating slab is formed by arranging the insert on the insert and further placing concrete.

The screw 1b cut on the inner circumference of the lower part of the main body 5 is
After the heat insulating slab is formed, it is used for screwing and attaching a hanger or a fixing tool for pipes from the lower side of the form and heat insulating plate 6 in FIG. Therefore, in order to expose this screw 1a to the lower side in FIG. 1, it is necessary that the portion of the tubular support portion 3 below the collar portion 4 has a length that penetrates the form and heat insulating plate 6. is there.

The range in which the screw 1b is formed may be a narrow range of only the lower part of the main body 5 as long as the hanger or the fixture can be screwed and fixed. Further, the hollow portion of the main body 5 may be vertically penetrated, and the screw 1b may be cut all around the hollow portion. However, when the main body 5 has a hollow portion that penetrates vertically, concrete may flow into the concrete when it is poured, so that the hollow portion of the main body 5 should be provided in a range that does not penetrate upward as in this embodiment. preferable.

The protruding portion 9 formed in the middle portion of the main body 5 is not essential, but if it is provided, the upper portion of the main body 5 is tubular when the main body 5 is inserted into the tubular support portion 3. It is preferable because it can be locked in a state of protruding above the support portion 3, and the concrete 5 cast from above can surely hold the main body 5. In order to improve the adhesion between the concrete and the main body 5, a streak is placed on the upper part of the main body 5 protruding above the cylindrical support portion 3, and the main body 5 does not idle when the suspending tool or the fixing tool is screwed into the screw 1b. As described above, it is also preferable that the top surface of the main body 5 has a rectangular shape or a polygonal shape.

Although the main body 5 is inserted into the tubular support portion 3 with its lower end remaining inside the tubular support portion 5, the main body 5 is tubular with its lower end protruding from the lower end of the tubular support portion 5. It may be inserted into the support portion 5. However, in order to protect the operator from the blade 2 of the tubular support portion 3 projecting from the lower surface of the mold and heat insulating plate 7 in FIG. 1, the lower end of the main body 5 is made to slightly project from the lower end of the tubular support portion 3, It is preferable to prevent the blade 2 from directly touching the operator.

The form and heat insulating plate 6 will now be described. This is a heat insulating plate 10 in which a synthetic resin film is laminated and integrated on one surface, and is laid with the synthetic resin film 7 side down. In the case of this formwork and heat insulating plate 6, when a downward load is applied by a worker getting on after installation, the synthetic resin film supports the tension generated on the lower surface of the heat insulating plate 10 by bending downward. Therefore, the weight can be sufficiently supported without cracking.

The heat insulating plate 6 used for this form and heat insulating plate 6 is
Although it is the same as the one used conventionally and is not special at all, it is preferable to use one having an excellent compressive strength such as a polystyrene foam plate. Further, as the synthetic resin film, for example, a film of polyester, polystyrene, polyethylene or the like or a laminated film thereof can be used, and a film having particularly high tensile strength is preferable.

Next, another embodiment will be described with reference to FIG.

This insert is composed of a collar portion 4 and a main body 5.

The main body 5 in this embodiment is, so to speak, as shown in FIG.
It also has the function of the tubular support portion 3 in the embodiment shown in FIG. That is, the collar portion 4 having the knob portion 8 is fixed to the intermediate portion by projecting outward, and the screw 1a is cut on the outer periphery of the collar portion 4 below the collar portion 4. Further, the main body 5 has a hollow portion that penetrates vertically, and the screw 1b is cut on the inner periphery of the hollow portion toward the lower side.

The lower half of the main body 5 is hollow, and the screw 1b is cut on the inner circumference of this hollow portion. The main body 5 is inserted into the tubular support portion 3 from above. Further, a protrusion 9 is formed in an intermediate portion of the main body 5, and when the main body 5 is inserted into the tubular support portion 3, the protrusion 9 comes into contact with the upper surface of the tubular support portion 3 and the main body 5 Is to be locked.

Each member has a function similar to that described with reference to FIGS. 1 to 3, but in this embodiment, the main body 5 is used.
It is different in that it is installed by being screwed in until it directly penetrates through the formwork and heat insulating plate 6. In the case of this embodiment, there is an advantage that the number of parts of the insert itself may be small.

The main body 5 of this embodiment has a hollow portion that penetrates vertically, and this discharges the chips that have entered the main body 5 when the main body 5 is screwed into the form and heat insulating plate 6. This is to make it easier. That is, the chips can be ejected from above with a stick or the like. In this case, after the installation of this insert, the upper end of the main body 5 is closed with adhesive tape or the like, and the main body 5 is used when concrete is placed later.
It is preferable that concrete does not get inside. In addition, the chips that have entered when the main body 5 is screwed in are scraped out from below, so that it is possible to prevent concrete from entering without allowing the hollow portion of the main body 5 to penetrate upward.

In this embodiment, the main body 5 and the collar portion 4 may be integrally formed, and the forming range of the screw 1a and the screw 1b is the same as that described in the embodiment of FIGS. It can be adjusted in a range.

[0039]

The present invention is as described above and has the following effects.

(1) This insert can be installed directly on the formwork / insulation plate 6 without forming a through hole in the formwork / insulation plate 6 with a special tool in advance. Since there is no need for post-processing associated with it, the installation work is simple and can be performed efficiently.

(2) In a construction method that does not use a formwork that uses the formwork and heat insulating plate 6, since the installation can be performed in a stable state without fear of coming off, the utility value of this construction method can be increased. In other words, it is possible to promote the spread of the construction method, which has a great advantage that the waste of the disposable formwork is saved and the work of laying and removing the formwork is unnecessary.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing one example of a state of being installed on a formwork and heat insulating plate.

FIG. 2 is a front view of a tubular support portion and a collar portion.

FIG. 3 is a front view of the main body.

FIG. 4 is a cross-sectional view showing another embodiment in a state in which it is installed on a formwork and heat insulating plate.

[Explanation of symbols]

 1a Screw 1b Screw 2 Blade 3 Cylindrical support 4 Collar 5 Main body 6 Formwork and heat insulating plate 7 Synthetic resin film 8 Grip 9 Protrusion 10 Heat insulating plate

Claims (2)

[Claims] 1. A cylindrical support part having a screw threaded at least on the lower periphery and having a blade at the lower end that exerts a cutting function when the screw is rotated in the screw-in direction, and outward from the cylindrical support part. The flange portion of the tubular support portion is threaded at least on the inner circumference of the lower portion, and the main body is inserted and locked in the tubular support portion from above. The length of the tubular support portion below the collar portion is the heat insulating slab. An insert for a heat insulating slab, which has a length that penetrates a heat insulating plate made of a synthetic resin foam, which is also used as a mold and is provided in the. 2. A body having at least a lower end outer periphery and a lower inner periphery, and a blade having a blade at the lower end, which has a cutting function when rotated in the screwing direction of the screw on the outer periphery side, and the body protruding outwardly. An insert for a heat insulating slab, characterized in that the length below the flange portion of the main body is a length that penetrates a heat insulating plate made of synthetic resin foam that also serves as a mold provided in the heat insulating slab. ..