JPH10159229A - Nonslip deck plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a nonslip function, by applying a single kind or more of particles with a specified diameter such as sand, silica sand, etc., mixed with a resin such as acrylic resin or the like, on the upper face of a deckplate functioning as a form for a floor slab of a building. SOLUTION: One or more kinds of particles 12 with particle sizes of 100-500μm such as sand, silica sand, artificial sand, etc., mixed with a resin such as acrylic resin or denatured epoxy resin or the like, are applied on the upper face of a deckplate 11 made of galvanized sheet iron. Both ends of the deckplate 11 are supported by two points and frozen snow 14 is placed on the deckplate 11 and further, a horizontal slide force F is given by taking walking of a 60kg person into consideration and a deplacement δ against the slide force F is obtained. In this way, the displacement δ is reduced against the slide force even if snow has lain and the nonslip function is brought out and safety can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deck plate used as a formwork of a floor slab of a general building structure, and more particularly to a non-slip deck plate which exhibits a slip-proof function even in snow.

[0002]

2. Description of the Related Art Generally, a deck plate used as a formwork of a floor slab is used as a working floor until concrete is cast. For this reason, there has been conventionally known a deck plate whose surface is subjected to anti-slip processing in consideration of work safety at a building site.

FIG. 3 is a perspective view showing a first example of a conventional anti-skid deck plate subjected to a slip prevention process.

The anti-skid deck plate of the first conventional example is
A large number of projections 3 are provided on the flat plate portion 2 of the deck plate 1 so as to project to the upper surface by embossing.

FIGS. 4 and 5 show, for example, JP-A-7-2792.
It is a perspective view which shows the 2nd example and the 3rd example of the conventional anti-slip deck plate which performed the slip prevention process shown by Unexamined-Japanese-Patent No. 89, respectively.

The second conventional non-slip deck plate is prepared by mixing particles 4 such as silica sand having a maximum particle size of 100 μm into a resin that can be bonded to a deck plate 5 made of a steel plate or a galvanized steel plate. It is applied to at least the surface on which the worker walks, so that the anti-slip function can be exerted even when the surface is wet with water due to rain or the like.

A third conventional non-slip deck plate comprises a pressure-sensitive adhesive sheet 7 having a non-slip coating on its surface mixed with particles 6 such as emery or silica sand having an upper limit of 100 μm in particle diameter.
It is attached to at least the surface of the deck plate 5 on which the worker walks at the site.

Although not shown, other than the above, for example, holes are made in a plurality of places on the deck plate, and at the time of this hole making process, a process is performed such that the pieces are turned back so that the remnants remain on the upper surface side. Some of the formed folded portions have an anti-slip function (hereinafter referred to as a fourth conventional example).

[0009]

However, in the first conventional example in which a large number of projections 3 protruding from the upper surface by embossing are provided on the flat plate portion 2 of the deck plate 1, the deck itself has a small coefficient of friction. Plate 1
If water accumulates on the surface, the anti-slip effect is lost.

In addition, particles 4 having a particle size of 100 μm as the upper limit
In the second conventional example in which is mixed with resin and applied to the deck plate 5, the anti-slip function can be exerted even if water stays on the surface of the deck plate 5, but the anti-slip effect is lost when snow accumulates in winter.

The particle 6 having a particle size of 100 μm as the upper limit
In the third conventional example in which the pressure-sensitive adhesive sheet 7 having the non-slip coating film mixed with is adhered to the deck plate 5, even if the pressure-sensitive adhesive sheet 7 is adhered to a limited portion, the total adhered area becomes long. It is not practical, and must be peeled off during concrete casting, which is troublesome. Further, while the deck plate 5 is used as a work floor, the adhesive sheet 7 may be peeled off or cut off from the edge. When concrete is poured in this state, the residue of the adhesive sheet 7 is mixed into the concrete. There is a risk of doing so.

Further, in the fourth conventional example in which holes are formed in a plurality of places on the deck plate and the peripheral edge of the holes is formed by folding back so as to protrude to the upper surface side to prevent slipping, the strength of the deck plate is increased. There is a limit to the number of holes that can be formed,
It is not possible to provide the required number of non-slip portions at the required locations.

The present invention has been made in view of the above point and the finding that the cause of the loss of the anti-slip effect during snow accumulation is due to the fact that the particles are too small. It is intended to provide a deck plate.

[0014]

The anti-skid deck plate according to the present invention has a particle size of 100 to 500 μm on the upper surface of a deck plate functioning as a formwork of a floor slab of a building structure.
Sand, silica sand, artificial sand, shards, etc., mixed with one or more of them, such as acrylic resin, modified vinyl acetate resin, modified epoxy resin, unsaturated polyester resin, chlorinated rubber resin, or chloroprene resin It has been applied. In the present invention, particles such as sand and silica sand having a particle size of 100 μm to 500 μm suppress the displacement with respect to the sliding force even when snowing, and exhibit a slip prevention function. Further, the coefficient of friction of particles such as sand and silica sand hardly decreases even if the particle size is made larger than the conventional one (up to an upper limit of 100 μm), so that it exerts a slip-preventive function even against water retention. The reason why the lower limit of the particle size is set to 100 μm is that if it is less than that, the anti-slipping function against snow cover is lost. The upper limit of the particle size is 500μ.
The reason is that if it is more than that, the particles are mixed with resin such as acrylic resin, modified vinyl acetate resin, modified epoxy resin, unsaturated polyester resin, chlorinated rubber resin, or chloroprene resin and applied (after curing of the resin). ), It is difficult to integrate the particles with the resin, and the frictional force tends to cause the particles to be easily separated from the coated surface.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a diagram showing an example of an experiment in which displacement against slip force was examined using the anti-skid deck plate according to the present embodiment, and FIG. 2 is a diagram showing the experimental result in comparison with a conventional example.

The anti-skid deck plate of the present embodiment comprises a single or a plurality of particles 12, such as sand, silica sand, artificial sand, and rubble stone, having a particle size of 100 μm to 500 μm on an upper surface of a deck plate 11 made of galvanized steel. It is applied by being mixed with a resin 13, such as a resin, a modified vinyl acetate resin, a modified epoxy resin, an unsaturated polyester resin, a chlorinated rubber resin, or a chloroprene resin. When a chlorinated rubber-based resin is used, 1.41 kg of silica sand having a particle size of 3, 4, and 5 is added to 0.6 kg of the chlorinated rubber-based resin paint.
A mixture of 0.7 kg and 0.7 kg and well stirred can be sprayed with a mortar gun.

Here, the lower limit of the particle size of the particles 12 is 100 μm.
The reason is that if it is less than that, the anti-slip function will be lost against snowfall. When the upper limit of the particle size is set to 500 μ, if the particle size is larger than that, the particles may be made of acrylic resin, modified vinyl acetate resin, modified epoxy resin, unsaturated polyester resin,
Resin 13 such as chlorinated rubber resin or chloroprene resin
This is because, after mixing and application (after curing of the resin), the integration of the particles and the resin is weakened, and the particles tend to peel off from the application surface due to frictional force.

An experiment of the anti-slipping effect of the deck plate 11 having the above-mentioned structure against snow cover was conducted under the following conditions. As shown in FIG. 1, both ends of the deck plate 11 are
With a point, a rough snow 14 is placed on the deck plate 11 and a 60 kgf person is assumed to be walking, and a 60 kg weight 16 is placed on a pair of work shoes 15, and a sliding force F is applied in the horizontal direction. Then, the displacement δ with respect to the sliding force F was examined. Under the same conditions, the anti-slip effect was also examined on the deck plate 1 with projections by embossing (FIG. 3) and the deck plate 5 (FIG. 4) coated with a resin mixed with particles having a particle size of 100 μm or less under the same conditions. Figure 2 shows the experimental results.
Shown in

FIG. 2 shows the sliding force F on the vertical axis and the displacement δ on the horizontal axis. As is clear from FIG. 2, the anti-skid deck plate of the present embodiment has a particle 12 having a particle size of 100 μm to 500 μm, such as sand or silica sand, which suppresses the displacement δ with respect to the sliding force F even when snow is deposited, and has an anti-slip function. You can see that it is showing.

Although not shown in the figure, an experiment on the anti-slip effect against water retention was also conducted. As a result, the friction coefficient of the particle 12 itself such as sand or silica
(Up to 0 μm as the upper limit), there was almost no decrease, and it was confirmed that the anti-slipping function was exhibited even with water retention.

On the other hand, it can be seen that the conventional deck plate 1 with projections and the deck plate 5 coated with a resin mixed with particles having a particle size of 100 μm or less lose the effect of preventing snow from slipping.

As described above, in the anti-skid deck plate of the present embodiment, the particles 12 such as sand and silica sand having a particle size of 100 μm to 500 μm reduce the displacement with respect to the slipping force even when snow accumulates as well as water accumulation. Since it suppresses and exhibits anti-slip functions, safety can be ensured regardless of the season or region.

[0023]

As described above, according to the present invention, sand, silica sand, artificial sand, and dust having a particle size of 100 to 500 μm are formed on the upper surface of a deck plate functioning as a formwork of a floor slab of a building structure. Particles such as stones were mixed with single or multiple types of resin, such as acrylic resin, modified vinyl acetate resin, modified epoxy resin, unsaturated polyester resin, chlorinated rubber resin, or chloroprene resin. In addition, even if it is snow-covered, the displacement against the sliding force is kept small, and the anti-slip function is exhibited. For this reason, safety can be ensured regardless of the four seasons or the region.

[Brief description of the drawings]

FIG. 1 is a view showing an experimental example in which a displacement with respect to a sliding force is examined using a non-slip deck plate according to an embodiment of the present invention.

FIG. 2 is a diagram showing experimental results of an anti-slip effect of the anti-skid deck plate according to the present embodiment in comparison with a conventional example.

FIG. 3 is a perspective view showing a first example of a conventional anti-skid deck plate.

FIG. 4 is a perspective view showing a second example of a conventional anti-skid deck plate.

FIG. 5 is a perspective view showing a third example of a conventional anti-skid deck plate.

[Explanation of symbols]

 11 Deck plate 12 Particle 13 Resin

Claims (1)

[Claims] 1. A particle size of 100 μm to 500 μm on an upper surface of a deck plate functioning as a formwork of a floor slab of a building structure.
μ, sand, silica sand, artificial sand, rubble stone, etc., alone or in combination, acrylic resin, modified vinyl acetate resin, modified epoxy resin, unsaturated polyester resin, chlorinated rubber resin,
A non-slip deck plate characterized by being mixed with a resin such as chloroprene resin and applied.