JPH028078Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to scaffolding metal fittings installed on quays, manholes, dams, buildings, etc., and used for lifting and lowering.It can prevent corrosion for as long as possible, and can be used for a long time. The purpose is to provide scaffolding metal fittings that can withstand.

In recent years, scaffolding metal fittings have been made of iron rods with a hard synthetic resin coated around them in order to prevent corrosion due to acids and moisture in the outside air. Since molding is performed by eating part of the core metal with a mold, it is not easy to coat the support part eaten by the mold with resin, and it is sufficient that the parts that come into contact with the outside air are coated with resin. For this reason, the vicinity of the tip of the support is generally not coated with resin.

However, since hard synthetic resin has no elasticity, it does not blend well with the concrete on which the scaffolding metal fittings are installed, and after the scaffolding metal fittings are installed, acid or moisture may be allowed to pass between the concrete and the hard synthetic resin coating of the embedded scaffolding metal fittings. This has the disadvantage that the outside air or moisture that contains water penetrates and comes into direct contact with the iron rod that is not coated with hard synthetic resin near the tip, which corrodes the iron rod and makes it impossible to withstand long-term use.

The present invention solves the above-mentioned conventional drawbacks by providing an annular groove on the outer periphery of the hard antiseptic coating in the part of the support part that is buried in concrete, and fitting an annular elastic packing into the groove.

The present invention will be explained below with reference to drawings which are examples.

Scaffolding metal fittings A are composed of a core metal 1, a hard antiseptic coating 2, and an elastic packing 3 made of rubber synthetic resin or the like.

The core metal 1 is made of a metal bar made of steel, cast iron, etc., bent into a U-shape, and consists of a foothold part 1a and a support part 1b. , hard antiseptic coatings such as rubber and synthetic resin 2
is provided.

In the figure, the tip of the core bar 1 is shown as being bent upwards, but this is not the only option, and any material that has a bulge at the tip, etc., may be used as long as it has a retaining function. .

It is preferable that the foothold portion 1a is provided with anti-slip irregularities, for example, as shown in the figure.

An annular groove 4 is provided on the outer periphery near the tip of the hard antiseptic coating 2 provided on the support portion 1b, and an annular elastic packing 3 made of rubber, synthetic resin, etc. is fitted into this annular groove 4. There is.

The annular groove 4 is buried in concrete 5 during use, and the elastic packing 3 fitted therein is provided at a position where it can seal between the hard preservative coating 2 and the concrete 5.

Since the scaffolding fitting of the present invention is constructed as described above, as shown in Fig. 3, a part of the support part 1b is buried in the concrete 5 and installed, and elastic packing occurs due to contraction of the poured concrete as it hardens. 3
is compressed, and since the concrete 5 is not compatible with the hard preservative coating 2, even if some gap is created between the hard preservative coating 2 and the concrete 5, the elastic deformation of the elastic packing 3 will close the gap. can be filled and sealed well.

Therefore, the vicinity of the tip of the core support, which does not have a hard antiseptic coating, can be isolated from the intrusion of outside air and water containing acids and moisture that corrode the metal, so the scaffolding metal fittings are prevented from being damaged by corrosion and can last for a long time. Can withstand use.

In addition, with such a simple structure, corrosion of the exposed part of the core metal can be prevented for a long period of time, so since the exposed part of the core metal is eliminated, there is no need for expensive resin coating, etc., and it is possible to create inexpensive scaffolding metal fittings. can be provided.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the scaffolding fitting of the present invention, Fig. 2 is a cross-sectional view taken along the line - - of Fig. 1, and Fig. 3 is a part showing the state in which the scaffolding fitting of the invention is installed on concrete. It is a notch sectional view. 1... Core bar, 2... Hard antiseptic coating, 3... Elastic packing, 4... Annular groove, 5... Concrete.

Claims (1)

[Scope of utility model registration request] Rubber is applied to the entire outer periphery of the core bar, which has a U-shaped footrest and a support, except for the vicinity of the tip of the support.
A scaffold comprising a hard antiseptic coating made of synthetic resin or the like, an annular groove provided on the outer periphery near the tip of the hard antiseptic coating provided on the support part, and an annular elastic packing fitted into the annular groove. Metal fittings.