JPH10266555A - Scaffolding board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight, strong scaffolding board by mounting a carbon fiber reinforced resin board to the rear side of a part where a scaffold is positioned so that the orientation of the carbon fiber conforms to the longitudinal direction of the scaffolding board. SOLUTION: A CFRP resin board 2 is fixed to the rear side of a wood scaffolding board 1 through an adhesive 3. In the resin board 2, carbon fibers are oriented in one direction and solidified using a resin and the fibers are oriented in the longitudinal direction of the board 1. In order to provide the equivalent strength without providing the board 2, it is necessary to increase the thickness of the board 1 and hence the total weight may greatly increases; however, by providing the board 2, it is not necessary to increase the thickness of the board 1 so that an increase in weight can be avoided and reduction in weight is achieved and strength can be improved. And the number of the board 2 is not limited to one. Thus reduction of weight and improved strength both can be achieved, and easy transportation, construction and removal can be achieved and reliability and safety can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold used at a construction site or the like.

[0002]

2. Description of the Related Art Scaffold plates are made of wood, metal,
There are synthetic resin and the like. Most wooden scaffolds use a single piece of wood. In addition, scaffolding plates made of metal (typically iron or aluminum) and scaffolding plates made of synthetic resin are made thinner in order to reduce the weight and material consumption. Many have structures reinforced with frames.

[0003]

Since the scaffolding plate is supported at intervals of several meters, it tends to bend between the supporting points. If the deflection is large, the feet become unstable, making it difficult to work on the scaffold and increasing the danger.

[0004] For this reason, a wooden scaffold plate has a large thickness, while a metal or synthetic resin scaffold plate has increased strength by increasing the plate thickness or adding reinforcing ribs. In some cases, a column having a higher strength is required.

[0005] The scaffolding board should be as light as possible in consideration of transportation, erection and removal, and should have higher strength from the viewpoint of safety.
Deflection occurs even when the plate thickness is considerably increased. Also, cracks,
In some cases, the strength distribution varies due to joints and the like, and when an excessive load is applied, there is a concern that a weak portion of the strength may be broken at a stretch, and the reliability is lacking.

Although this wooden scaffold is easier to obtain than other grades and is advantageous in terms of cost, it is disadvantageous in that it has large flexure and its strength remains uneasy.

Accordingly, an object of the present invention is to realize a light and tough scaffold board by making it possible to greatly increase the strength of a wooden scaffold board without increasing the weight.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a carbon fiber reinforced resin plate is provided on the back surface of a portion to be a scaffold, and the orientation direction of the carbon fibers coincides with the longitudinal direction of the scaffold plate. It was mounted in the right direction.

[0009] The reinforcing plate is preferably attached by bonding the entire surface so as to be completely integrated with the scaffold plate. If possible, it may be embedded in the plate to be reinforced. The reinforcing effect of this reinforcing plate is also exerted on a scaffold plate made of a material other than wood.

[0010]

The carbon fiber reinforced resin plate (hereinafter referred to as CFRP resin plate or resin plate) has a strength about 10 times that of iron and is light in weight. In the present invention, since the reinforcement is performed with the CFRP resin plate, the strength of the scaffold plate can be significantly improved. In particular, since the CFRP resin plate is attached to the back surface of the plate on which the tensile force acts when bending, the back surface side is prevented from elongating, and the bending of the wooden scaffold plate is extremely small. In addition, a large improvement in strength prevents a wooden scaffold from being easily broken.

CFR in which carbon fibers are oriented in one direction
The P resin plate is weak against bending force in the direction perpendicular to the longitudinal direction of the fiber. Therefore, the fibers are attached to the scaffold plate in a direction in which the orientation direction of the fibers coincides with the longitudinal direction of the scaffold plate.

[0012]

1 and 2 show a scaffold according to an embodiment of the present invention. 1 is a wooden scaffold plate, and a CFRP resin plate 2 is attached to the back surface of the plate 1 with an adhesive 3. The resin plate 2 is obtained by orienting carbon fibers in one direction and solidified with a resin, and is attached to the plate 1 so that the orientation direction of the fibers coincides with the longitudinal direction of the plate 1. This resin plate 2
Is not particularly limited, but is set to 1.2 mm here in order to suppress an increase in the overall thickness. Even with this thickness, a large reinforcing effect is obtained, and the scaffold plate becomes very tough.

If the same strength is to be provided without attaching the resin plate 2, it is necessary to considerably increase the thickness of the scaffold plate 1, and the overall weight is significantly increased. The plate 1 does not need to be thick. Therefore, an increase in weight is suppressed, and both weight reduction and high strength can be achieved.

The CFRP resin plate 2 does not need to be a single plate. The plate may be divided and attached in the width direction of the plate. Even if the resin plates divided in the width direction are attached at intervals, the purpose of reinforcement is achieved. However, since the reinforcing effect is interrupted at the dividing point if the substrate is divided and attached in the longitudinal direction, it is recommended to use a reinforcing plate that is continuous from the end of the scaffold plate in the longitudinal direction.

FIG. 3 shows a scaffold plate 1 made of metal or synthetic resin (which may be a composite material thereof) reinforced with a CFRP resin plate 2. Also in this case, the resin plate 2 is attached to the back surface of the plate serving as a scaffold. The mounting method may be the same as described above. Also in this case, compared to the material for forming the scaffold plate 1, C
Since the FRP resin plate 2 is lighter and has higher strength, the thickness of the scaffold plate 1 can be reduced to reduce the overall weight.

[0016]

As described above, since the scaffold plate of the present invention has the CFRP resin plate attached to the back surface of the plate, it is possible to realize weight reduction and high strength, and to facilitate transportation, erection and removal of the scaffold. , Leading to an improvement in safety-related reliability.

Further, since the bending of the wooden scaffold plate can be suppressed to a small level by the function of the resin plate, the work on the scaffold can be performed easily.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of an embodiment of a scaffold according to the present invention.

FIG. 2 is an end view of the same scaffold plate.

FIG. 3 is a cross-sectional view of another embodiment in the middle of the longitudinal direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Scaffold board 2 CFRP resin board 3 Adhesive

Claims (1)

[Claims] 1. A scaffold plate in which a carbon fiber reinforced resin plate is attached to a back surface of a portion to be a scaffold in such a manner that the orientation direction of carbon fibers coincides with the longitudinal direction of the scaffold plate.