JP2002012822A - Non-slip coating for scaffolding board made of metal and scaffolding board made of metal to which the same coating is applied - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a non-slip coating for a scaffolding board made of a metal, being simply applicable and having excellent non-slip property and a scaffolding board made of the metal to which the above coating is applied. SOLUTION: This non-slip coating is obtained by adding at least one of an aminosilane and a phosphoric ester monomer to 100 pts.wt. alkyd resin varnish obtained by dispersing an alkyd resin varnish with a phenol dispersion, mixing the resultant dispersion with a filler and diluting the mixture with a solvent and simultaneously mixing 3-20 pts.wt. urethane chip thereinto. The resultant coating is applied to whole flat part on the rear side of a scaffolding board made of metal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-slip paint for a metal scaffold used for a temporary scaffold in a construction site such as civil engineering and construction, and a metal scaffold applied with the paint.

[0002]

2. Description of the Related Art In construction sites such as civil engineering and construction, installation of temporary scaffolds is required in accordance with laws and regulations at work sites corresponding to so-called high-place work. Conventional scaffolds used for temporary scaffolds have been wooden boards such as wooden boards and plywood.However, due to severe wear due to repeated use and consideration of depletion of forest resources, in recent years lightweight aluminum and galvanized steel sheets have been used. Metal scaffolds have become widely used.

[0003] Such a metal scaffold plate is bridged over a horizontal member of a steel pipe scaffold, and fixed to a steel pipe by connecting it with a steel wire or the like to prevent displacement and blow-up. However, since contact between metals is likely to cause slippage and is dangerous, it has been practiced to stick a rubber sheet over the entire length of the back surface of the scaffold or to apply a rubber-based paint by baking. FIG. 1 is a plan view of a front side showing an example of a metal scaffold, FIG. 2 is a bottom view showing the same back side, FIG. 3 is a cross-sectional view showing an AA cross section in FIG. Numerous holes formed on the entire surface of the front plate 1, 3 side ribs formed by folding the longitudinal side surface of the front plate 1 into a U-shape, and 4 formed by folding the central portion of the front plate 1 in the longitudinal direction. Center ribs 5, both end members attached to both ends of the front plate 1, 6 a connecting member connecting the side ribs on both sides at the back surface, 7 a rubber sheet provided over the entire back side flat portion of the side ribs, coating It is non-slip. The drain hole 2 is a drain hole for preventing water from accumulating, and at the same time, the periphery of the hole protrudes to prevent the worker from walking, which contributes to weight reduction.

[0004] Standards are defined for metal scaffolding plates. For example, the width is 240 mm and 250 mm, and the height is 40 m.
m, and the length is 240mm, 2000mm and 3000m
m, 4000mm, and 250mm width, 4000
mm. When a rubber sheet is used as a slip stopper, the rubber sheet tends to be cut or peeled off, so there is a problem that inspection and repair must be performed frequently, and brushing cannot be performed when baking and applying rubber-based paint. For this reason, special coating equipment is required, and painting cannot be performed in places without such equipment, and the drying of the paint takes a long time, about one day and night.
There were problems such as arranging them in a large space so that the painted surfaces did not touch, or stacking the stocks.

Therefore, it has been attempted to use a one-pack normally dry paint such as an alkyd resin paint which does not require a drying facility. However, a normal one-pack normally dry paint has a weak adhesion to galvanized steel. There was a disadvantage. On the other hand, attempts have been made to improve the non-slip property by forming irregularities on the coating film surface by forming a projection by mixing a granular substance in the coating material instead of the rubber-based coating material. However, when a ceramic material, silica sand, or the like is used as the granular material, there is a problem that the granular material has a high hardness but is brittle, and is easily broken by an impact. In addition, the specific gravity of the granular material is, for example, about 1.4 with silica sand, which is heavier than the base paint, so that it tends to precipitate, and there is a problem that stirring must be performed at the time of painting.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems and provides a metal scaffold plate which can be coated without requiring a drying facility, and which exhibits a non-slip effect by uniformly distributing particles. It is intended to realize a non-slip paint for use as well as a metal scaffold plate to which the paint is applied.

[0007]

According to the present invention, at least one of an aminosilane and a phosphate ester monomer is added to 100 parts by mass of an alkyd resin paint obtained by dispersing an alkyd resin varnish with a phenol dispersion, mixing a filler and diluting with a solvent. And urethane chips 3 ~
A non-slip coating for metal scaffolds mixed with 20 parts by mass, preferably with a particle size of urethane chips of 0.2 to 0.6 m
m is the non-slip paint for a metal scaffold described above,
Alternatively, it is a metal scaffold plate coated with the above anti-slip paint over the entire rear side flat portion of the side rib.

[0008]

Embodiments of the present invention will be described below.
One embodiment of the anti-slip coating for a metal scaffold according to the present invention is based on an alkyd resin obtained by condensing 30 to 35% by mass of phthalic anhydride and 40 to 50% by mass of a fatty acid as a one-pack normally dry resin. For example, 34 parts by mass of this alkyd resin varnish is dispersed in 20 parts by mass of phenol dispersion, and a filler material 36 such as a coloring pigment or an extender green such as green is dispersed.
By weight, 100 parts by weight of the alkyd resin paint diluted with 10 parts by weight of an organic solvent such as xylene is added with at least one of an aminosilane and a phosphate ester monomer for improving the adhesion to the plating film. In addition, 3 to 20 parts by mass of a urethane chip for exhibiting a non-slip effect is mixed.

As an additive for improving the adhesion, aminosilane and a phosphate ester monomer are most effective when both are used, but the effect is recognized with either one. The amount of the aminosilane or phosphate ester monomer may be as small as 0.3 to 1 part by mass. If the amount is less than 0.3 part by mass, there is no effect, but if the amount exceeds 1 part by mass, the effect does not change.

The urethane chips are obtained by pulverizing a mass of urethane rubber into chips, and have a true specific gravity of 1.2 to 1.3 and a bulk specific gravity of 0.4 to 0.5, and are well mixed without being precipitated even when mixed into the alkyd resin paint. . Since the material is softer and more elastic than conventional contaminants such as silica and small sand, it does not crack or break the coating film due to impact.

The particle size of the urethane chips is preferably in the range of 0.2 to 0.6 mm. If it is less than 0.2 mm, the anti-slipping effect does not appear because it is too fine. Conversely, if it exceeds 0.6 mm, uniform mixing becomes difficult. As described above, the mixing ratio of urethane chips is 3 to 20 parts by mass with respect to 100 parts by mass of the alkyd resin paint. If the amount is less than 3 parts by mass, the anti-slip effect hardly appears, and if it exceeds 20 parts by mass, the coating operation becomes difficult.

The work of applying the anti-slip coating is of course not only in the case of newly manufacturing a metal scaffold plate but also in the case of inspection and repair for repeated use. As shown in FIGS. 2 and 3, this paint is applied to the entire rear side flat portion of the side rib 3 of the metal scaffold. Prior to painting, it is necessary to wipe off stains on the painted surface, strictly prohibit fire, and pay close attention to protective masks, ventilation, etc. for the second type organic solvents.

The features of the anti-slip coating of the present invention are as follows:
Workability is good. Since it is homogeneous and has good elongation, anyone can easily perform the application work using simple tools such as rollers and brushes. Further, since it is a one-liquid, normally-dry type, it is polymerized and dried by oxygen in the air, so that baking treatment and drying equipment are unnecessary. Since the drying time is as short as about 4 minutes, the painted objects can be stacked immediately, and a large space is not required for the painting operation.

The second feature is that it has good anti-slip properties. The non-slip effect of the non-slip paint is measured, for example, as follows. Same as 1 used for steel pipe scaffold
A metal scaffold plate coated with a non-slip paint is placed on the steel pipe, the metal scaffold plate is gradually inclined while lifting one end, and the inclination angle when slippage occurs with respect to the steel pipe is measured. 9.8 degrees on average for conventional metal scaffolds without anti-slip, 1 on average for conventional examples with rubber paint
In contrast to 5.3 degrees, the anti-slip coating of the present invention averages 21 degrees.

Further, a metal scaffold plate is bridged between two steel pipes which are installed in parallel and at the same height with an interval, and a weight of, for example, 40 kg is placed at the center, and the metal scaffold plate is pulled in the longitudinal direction. It is also possible to compare the anti-slip properties by measuring the tensile force when the steel pipe starts sliding. In the case of the conventional metal scaffold plate without anti-slip, it was about 5 to 6 kgf, and in the case of the conventional example with rubber-based paint, it was about 8 to 9 kgf, whereas in the case of the anti-skid paint of the present invention, 14 to 5 kgf. It was 15 kgf, and excellent slip resistance could be demonstrated in any of the measurements.

Further, as a third feature, it is difficult to peel off. The peel resistance can be judged by a test using a cross groove defined by JIS, but the paint of the present invention is also superior in peel resistance to the conventional one, and this is due to the effect of aminosilane added for the purpose of improving adhesion. Conceivable.

[0017]

According to the present invention, a metal scaffold plate which can be easily coated with a simple tool without the need for a drying facility, and which exhibits an excellent non-slip effect by uniformly distributing the granular material. The anti-skid paint and the metal scaffold plate coated with the anti-slip paint are realized, and the excellent effect of improving the safety of the steel pipe scaffold is achieved.

[Brief description of the drawings]

FIG. 1 is a front plan view showing an example of a metal scaffold according to the present invention.

FIG. 2 is a bottom view showing the back surface of the metal scaffold according to the present invention.

FIG. 3 is a sectional view taken along the line AA in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front plate 2 Drilling hole 3 Side rib 4 Central rib 5 Both end members 6 Connecting material 7 Non-slip

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme court ゛ (Reference) C09D 175/04 C09D 175/04 C09K 3/14 540 C09K 3/14 540F 540G 540K 540C 540Z E04G 5/08 E04G 5/08 BF term (reference) 4D075 CA13 CA15 CA47 DA23 DA35 DB02 DB05 DB07 DC03 EA07 EA23 EB36 EB38 EB56 EB57 EC07 EC13 EC53 EC54 4J038 DD121 DG002 JC24 JC35 KA06 KA08 KA20 MA02 PB05 PC02

Claims (3)

[Claims] 1. An alkyd resin varnish is dispersed in a phenol dispersion, a filler is mixed and diluted with a solvent.
A non-slip coating for a metal scaffold, wherein at least one of a phosphate ester monomer is added and 3 to 20 parts by mass of urethane chips are mixed. 2. The particle size of the urethane chips to be mixed is 0.2
The non-slip paint for a metal scaffold according to claim 1, which has a thickness of from 0.6 to 0.6 mm. 3. A metal scaffold plate coated with the anti-skid paint according to claim 1 or 2 over the entire rear surface side flat portion of the side rib (3).