JPH019848Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to an insert for being embedded in a concrete wall, which is embedded in the ceiling wall of a building and used for suspending a chandelier or the like.

As this kind of insert, the one shown in FIG. 5 is known (see Japanese Utility Model Application Publication No. 55-47548). However, according to this conventional example, during the final work of burying the insert a in the concrete wall b,
When formwork c was removed, the tips of nails d, d... would protrude below the surface of concrete wall b, which required cutting and finishing work using a grinder. Furthermore, in order to prevent the rust from the nails d, d, etc. from seeping into the surface of the concrete wall b (specifically, the surface of the mortar applied to the concrete wall b), a rust-preventing coating work was also necessary. What is shown in Fig. 5 are nails d,
Although the top ends of the nails d... are welded to the metal body e, nails d, d... are not welded to the metal body e, but nails d, d... have been widely used in the past. The latter also had the same drawbacks as shown in FIG.

The present invention is aimed at correcting the drawbacks of the above conventional example, and has a metal body 2 having a screw hole 1 opening downward.
In the insert for embedding in a concrete wall, a synthetic resin cylindrical body 3 is fitted over the cylindrical body 3, and a nail holder 5 for holding the nail 4 in the same direction as the screw hole 1 is provided in the cylindrical body 3. The part 5 is integrally formed in the support hole 6 of the cylindrical body 3 via the thin wall part 13, and the nail holding part 5 together with the nail 4 can be separated from the cylindrical body 3 at the thin wall part 13. It is characterized by

The present invention will be explained in detail below based on embodiments shown in the drawings.

The metal main body 2 consists of a collar-shaped head 7 and a body 8, and a screw hole 1 is provided on the center line of the body 8, with only the lower part open.

The synthetic resin cylindrical body 3 has a hole 9 in the center into which the main body 2 is fitted, and has flanges 10 and 11 on the top and bottom.
have. On the outer periphery of the cylinder 3 are upper and lower collars 10,
A plurality of bulging portions 12, 12, 12 continuous to 11 are integrally formed, and each of these bulging portions 12, 12, 12 is provided with a support hole 6, 6, 6 in the same direction as the screw hole 1. .

A nail holding tube (nail holding portion) 5 is loosely inserted into each support hole 6 and is temporarily fixed in the support hole 5. In this embodiment, at the time of molding the cylinder 3, the nail holding cylinder 5 and the connecting membrane (thin wall part) 13 connecting the nail holding cylinder 5 and the support hole 5 are integrally molded from synthetic resin. The strength of the connecting film 13 needs to be set within a range that allows the functions of the present invention, which will be described later, to be carried out without any trouble. The nail holding tube 5 has a nail hole 14 at its center, into which the nail 4 can be inserted. The outer diameter of the nail holding cylinder 5 is equal to the head 15 of the nail 4.
It is formed larger than the outer diameter of. Further, when the nail 4 is inserted into the nail holding cylinder 5, the lower end thereof is configured to protrude downward by an appropriate length, as shown in FIG.

In the above embodiment, a plurality of support holes 6 are provided in the cylinder 3, and one nail holding cylinder 5 is integrally formed in each of these holes.As shown in FIGS. 3 and 4, the cylinder 3 A large support hole 6 may be provided in the support hole 6, and a nail holding tube (nail holding portion) 5 having a plurality of nail holes 13, 13, . In FIG. 3, reference numeral 13a indicates the remains of the thin portion 13 that has been torn off.

Next, the operation of the present invention will be explained based on the embodiment shown in FIGS. 1 and 2. In the insert of the present invention, as shown in FIG. 2, the cylindrical body 3 is fixed to the formwork 16 by driving nails 4, 4... into the formwork 16, and then the main body 2 is fitted into the cylinder body 3. Then, it is set on the formwork 16. After installing the formwork 16 at a predetermined location,
Concrete 17 is poured and filled around the insert. When the concrete 17 hardens, a wall surface of the concrete 17 is formed along the formwork 16, and at the same time, the insert is embedded therein with only the lower surface open and is firmly supported.

Next, when the formwork 16 is pulled downward in order to remove it, the nails 4, 4, etc. nailed therein are also pulled downward, and the spaces between the nail holding cylinders 5, 5... and the support holes 6, 6... The connecting films 13, 13... are torn off. As a result, at the same time as the formwork 16 is removed, the nails 4, 4, . . . and the nail holding portions 5, 5, .
(This state is shown in phantom lines in FIG. 2.)

Since the present invention has the above structure and function, the nails can be removed at the same time as the formwork is removed, and the work of cutting the protruding parts of the nails, finishing work with a grinder, and anti-rust coating work, which were necessary in the conventional example, can be removed. All of these steps are no longer necessary, and the work of embedding the insert into the concrete wall becomes simple and easy.

Further, according to the present invention, since the nail holding portion and the cylindrical body are integrally formed, both can be formed simultaneously with one mold, thereby reducing manufacturing costs. In addition, the nail holding part and the cylindrical body are already connected, so that the bonding force between the two is stable for each product, and there is no need to connect the two, which saves time and effort when attaching the two to the formwork.

Furthermore, since the nail holding part and the cylindrical body are connected by the thin wall part, the cylinder body does not easily fall off after being attached to the formwork, and when removing the formwork, the nail holding part is connected to the thin wall part. By separating the insert from the cylindrical body, the insert can be reliably buried in a predetermined location in the concrete wall.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention disassembled into its component parts, Fig. 2 is a longitudinal sectional front view showing its usage state, and Fig. 3 is a nail holding portion of another embodiment of the present invention. FIG. 4 is a cross-sectional view of the assembled state, and FIG. 5 is a longitudinal sectional front view of the conventional example. 1... Screw hole, 2... Main body, 3... Cylindrical body, 4...
Nail, 5... Nail holding part, 6... Support hole, 13... Thin wall part.

Claims (1)

[Scope of utility model registration request] An insert for embedding in a concrete wall, comprising a metal body having a screw hole that opens downward, a synthetic resin cylinder fitted over the cylinder, and a nail holding part for holding a nail in the same direction as the screw hole of the cylinder. The nail holding portion is integrally formed within the support hole of the cylindrical body via a thin walled portion, and the nail holding portion is configured such that the nail holding portion can be separated from the cylindrical body at the thin walled portion along with the nail. Insert for embedded in concrete wall.