JPH0432255Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a method for holding insert hardware that can stably support the insert hardware in a fixed position in the formwork when molding concrete products, and does not require any effort to remove it. Regarding ingredients.

(Prior art) Conventionally, a cylindrical body with a flange that fits and supports a metal object to be inserted, a mounting screw connected to the flange side of the cylindrical body and screwed into a hole provided in a formwork, and A device having a notch provided around the boundary between the mounting screw and the cylindrical body to be torn off during demolding, and a tool hooking means provided on the screw was developed in 1983-
According to Publication No. 3863, in order to embed the fixing member in the block, the opening of the fixing member and the inner end of the sealing member are aligned with each other through the communication hole of the formwork, and then the retaining protrusion of the fixing member is turned. Assemble both parts and firmly tighten the handle of the sealing member.
The idea of bringing the outer end of the fixing member into close contact with the periphery of the connecting hole in the formwork and pouring cement into the formwork was developed by Jitsukasho.
According to Publication No. 59-174210, in a fixture for fixing the embedded metal fitting to the positioning metal fitting, which has a male thread that engages with the female thread of the embedded metal fitting, the diameter of the male threaded portion of the fixing device is made variable. The idea of forming the diameter of the
94503, respectively.

The invention of Utility Model Publication No. 59-3863 mentioned above was
When the cylindrical body fixed to the formwork with the mounting screws is removed from the mold,
It has the feature that it does not take much effort to remove because it can be torn off from the notch made at the border with the mounting screw. However, since the insert hardware is fitted into the cylindrical body, it is not only securely fixed, but also easily tilted or detached due to concrete pouring pressure.
The part that fits into the cylindrical body is isolated from the concrete, creating a stable insert that encloses the entire hardware in the concrete.Also, since the female thread of the insert hardware opens to the outside, there is no chance of the screw rusting during storage. There is a problem in that foreign matter may adhere to the screws, which may interfere with screw tightening.

In addition, the invention of Utility Model Application Publication No. 59-174210 is that the fixing member is screwed to the formwork so that it does not tilt or come off due to the pouring pressure of concrete, and is completely enclosed in concrete and inserted stably. However, since the male screw of the contact member with a head with a handle is screwed into the female screw of the fixing member,
When setting the fixing member into the formwork, not only do you have to use the handle to turn the male screw in one direction to screw it into the fixing member, but when removing it, you also have to turn the male screw in the other direction and screw it out of the fixing member.
It takes a lot of time to remove it, and since the female thread of the fixing member opens outwards when the contact member comes off, there is a problem that the female thread may become rusted or have foreign matter attached to it during storage, making it difficult to tighten the screws. .

Next, the idea of Japanese Utility Model Application Publication No. 58-94503 is that the embedded metal fittings are screwed to the formwork so that they do not tilt or come off due to the pouring pressure of concrete, and are completely enclosed in concrete and inserted stably. However, since the male screw whose diameter can be expanded or contracted by a member is screwed into the female thread of the embedded metal, when setting the embedded metal into the formwork, it can be expanded with a small nut. Pull up the rod to enlarge the diameter of the male thread, screw it into the female thread of the embedded metal fitting, then tighten the nut, and when removing it, loosen the nut and push down the expansion rod to contract or close the diameter of the male thread. In this case, it is necessary to unscrew the female thread of the embedded metal fitting, which takes time to remove, and also, since the female thread of the embedded metal fitting opens outward when the male female screw is removed, rust and foreign matter may occur. There is a problem in that it causes adhesion and hinders tightening.

The present invention was made to solve the above-mentioned conventional problems.The insert metal is set in the formwork by screwing the support screw into the female thread of the insert metal, but it cannot be removed from the formwork. By demolding the molded concrete product, the thin part provided at the boundary between the support screw and the mounting part is torn off by itself, so that it does not take much effort to separate.
In addition, by supporting the insert hardware on the inside and stabilizing the insert by encasing it entirely in concrete, the female threads of the insert hardware are covered with support screws during storage to prevent rust and adhesion of foreign matter. The purpose of the present invention is to provide a holder for insert metal fittings that enables smooth and light screw tightening.

(Means for Solving the Problem) The insert hardware holder of the present invention to achieve the above object includes a support screw that is screwed into the female thread of the hardware to be inserted, and a support screw that is connected to the support screw. A mounting part that fits and secures into a hole provided in the formwork, a tool hanging hole provided from this mounting part to the support screw, and a boundary between the support screw and the mounting part so as to prevent it from being torn during demolding. The structure includes a thin wall portion provided therein.

(Function) The insert hardware holder for concrete molding configured as described above is fixed to the formwork by fitting the mounting part into the hole provided in the formwork and fixing it to the formwork with screws or abutting parts. When the female thread of the metal insert is screwed into the supporting screw connected to the support screw, and the screw is tightened until the end face of the metal fitting contacts the formwork, the metal insert is securely fixed in a fixed position within the formwork by the screw.

Therefore, when concrete is poured into the formwork, the metal insert will not tilt or come off due to the pouring pressure of the concrete, and will be completely encapsulated in the concrete and stably inserted into the product.

Next, insert molding of the product is performed, and when the mold is taken apart when the product can be removed from the mold, the thin wall part provided at the boundary between the support screw screwed into the female thread of the insert hardware and the mounting part is exposed. Since the insert metal piece is torn off and removed from the formwork by itself, it does not require any effort at all to remove the metal piece.

In addition, the female threads of the hardware inserted into the demolded product are closed with support screws during storage to prevent rust or foreign matter from adhering to them, and the support screws must be removed and tightened when in use. If you do this, you will be able to do this smoothly and easily.

(Example) An example of an insert hardware holder for concrete molding according to the present invention will be described below based on the drawings.

Figures 1 to 3 show an embodiment in which screws are used as the attachment means. In the figures, 1 is a support screw in the insert hardware holder A, and this and the attachment part to be described later are integrated with plastic or the like. The metal insert 2 is molded, the female thread 3 of the metal insert 2 is screwed together, and the metal piece 2 is supported by a formwork to be described later.

Reference numeral 4 denotes a mounting portion which is connected to the above-mentioned support screw 1, and has a thread 5 formed on its circumferential surface, and this male thread 5.
into the screw hole 7 provided in the formwork 6, and then tighten the support screw 1.
is fixed to the formwork 6.

Reference numeral 8 denotes a thin wall portion provided at the boundary between the support screw 1 and the mounting portion 4, and a notch is made on the outer periphery of the boundary as shown in FIG. In between, a thin part is formed that can be reliably torn by the force exerted during demolding of the product molded within the mold.

9 is a corner formed so as to extend from the support screw 1 to the attachment part 4, and whose end is open to the attachment part 4;
The hole 9 has a polygonal shape or the like, and a known tool is inserted into the hole 9 to remove the separated mounting portion 4 and support screw 1.

In this embodiment, a screw 5 provided on the outside of the attachment part 4 of the holder A is screwed into an internal thread 7 provided in the formwork 6, and the support screw 1 is screwed into the formwork 6 by this screw 7.
When the female screw 3 of the metal insert 2 was screwed onto the support screw 1 and used, the function as shown in the function column was achieved, and the effects as described below were achieved.

4 to 6 show an embodiment in which a contact portion is used as the attachment means, and the attachment portion 4 is formed so as to fit tightly into the hole 10 of the formwork 6, and the rear end A stepped portion 11 that comes into contact with the formwork 6 is provided on the
The rest of the structure is the same as that of the embodiment described above.

In this embodiment, the attachment part 4 of the holder A is attached to the formwork 6.
The abutment part 11 is fitted into the hole 10 until it touches the outer surface of the formwork 6, the support screw 1 is supported by the formwork 6 by the abutment part 11, and the insert hardware 2 is inserted into the support screw 1.
When used with the female screw 3 screwed together, this embodiment also effectively achieved the effect shown in the above-mentioned function column.

(Effect of the invention) As mentioned above, in the concrete molding insert hardware holder of the present invention, when the support screw is screwed into the female thread of the insert metal, the metal fitting is securely fastened to the formwork, and the concrete is poured easily. It is possible to securely fix the metal insert so that it will not tilt or come off due to pressure, and the insert hardware is entirely surrounded by concrete, allowing it to be stably and strongly inserted into the product.

When the product is removed from the mold after insert molding the hardware, the support screw tears off from the thin part provided at the boundary with the mounting part and separates by itself, so it does not take much time to remove it.

If the female threads of hardware inserted into the product are covered with support screws during storage, rust and foreign matter will be prevented from adhering to the product, and the screws will be tightened smoothly and easily.

This provides the above-mentioned unique effects.

[Brief explanation of the drawing]

FIGS. 1 to 3 show an embodiment in which screws are used as the attachment means for the insert holder for concrete molding according to the present invention, and FIG. 1 is a longitudinal sectional front view showing the state in which the insert metal holder is attached. FIG. 2 is a plan view of the holder. FIG. 3 is a longitudinal sectional front view of the support screw and the mounting portion separated from the thin wall portion by demolding. 4 to 6 show an embodiment in which a contact portion is used as the mounting means, and FIG. 4 is a longitudinal sectional front view showing a state in which the metal insert is mounted. FIG. 5 is a plan view of the holder. FIG. 6 is a longitudinal sectional front view of the support screw and the mounting portion separated from the thin wall portion by demolding. A... Holder, 1... Support screw, 2... Insert hardware, 3... Female thread, 4... Mounting part, 6...
...Formwork, 7 and 10...hole, 8...thin wall part.

Claims (1)

[Scope of utility model registration request] A support screw that is screwed into the female thread of the hardware to be inserted, a mounting part that is connected to this support screw and fits into a hole formed in the formwork, and a part that straddles the support screw from this mounting part. An insert hardware holder for concrete molding, characterized in that it is provided with a tool hanging hole, and a thin walled part provided at the boundary between the support screw and the mounting part so as to be torn off during demolding.