JP3706757B2 - Fall prevention fence - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wooden fence for preventing falls using reinforced wood reinforced with a steel pipe or the like.
[0002]
[Prior art]
Conventionally, Japanese Examined Patent Publication No. 55-48925 is known as a wood reinforced with steel. In this structure, a groove is formed at a predetermined position of wood, and a reinforcing material such as a lightweight steel frame is embedded in the groove.
[0003]
[Problems to be solved by the invention]
However, the steel frame was exposed on the outer surface of the wood, and the appearance of natural wood was damaged. On the other hand, natural roads, plazas, and other fences in natural parks are preferably provided with natural wooden fences, but there are problems such as strength and weathering, and concrete or artificial trees are used. ing.
[0004]
The present invention provides a fall-preventing fence that has sufficient strength to withstand car crashes while maintaining the natural appearance of wood reinforced with steel pipes, etc. is there.
[0005]
[Means for Solving the Problems]
Cover the reinforcing pipe with half-timber provided with the groove for reinforcing pipe and the groove for bonding, press the adhesive into the bonding groove, and use the reinforcing wood that integrates the wood and the steel pipe for the column and cross member, This is a fall-preventing fence in which the portion of the pillar material embedded in the basic concrete is covered with synthetic resin.
[0006]
[Action]
Because the reinforcing pipe is covered with half of the wood, it has high strength and the appearance is the same as natural wood.
In the state where the reinforcing pipe is covered with the half-timber, the adhesive is pressed into the bonding groove and integrated, so that the manufacturing process is simple and the manufacturing cost can be reduced.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the wood 1 is halved, a semicircular groove is formed, and the steel pipe is completely covered with the halved wood. The material and shape of the wood 1 are not particularly limited, but logs using thinned cedar are suitable. The wood 1 is subjected to antiseptic and insecticidal treatment such as CCA processing (zinc naphthenate) as necessary. The antiseptic treatment is performed from both the inside and outside of the half-timbered wood 1. Therefore, the preservative penetrates the whole wood, there are few untreated parts, and the antiseptic effect is enhanced.
[0008]
Although it is advantageous in terms of cost to use a steel pipe 4 having a circular or square cross section, the steel pipe 4 is not limited to a steel pipe, and a light metal pipe or a plastic pipe can be used as a reinforcing pipe.
[0009]
Adhesive grooves 3 are provided in the longitudinal direction on both sides of the semicircular groove 2, and the adhesive grooves 3 face each other to form a space when covered with the reinforcing steel pipe 4.
A polyurethane resin is press-fitted at a pressure of 10 to 15 MPa into the space constituted by the bonding grooves 3 and bonded immediately. An adhesive or sealing agent is applied to the contact surface between the steel pipe 4 and the wood to prevent rainwater from entering.
[0010]
FIG. 3 shows an example of the fall prevention fence of the present invention. The reinforcing wood shown below was used for the cross.
The cross member 12 of the fall prevention fence was subjected to antiseptic treatment by forming a semicircular groove and an adhesive groove by halving the thinned material with a diameter of 80 mm. A steel pipe having a diameter of 48.6 mm and a thickness of 2.4 mm was covered with the half member. The position was adjusted so that the bonding grooves 3 face each other accurately, and the steel tube 4 was covered, and temporarily fixed with a clamp. Using a high-pressure injection device, polyurethane resin was injected into the bonding groove 3 at 12 MPa, and the steel pipe 4 was covered with the wood 1 and integrated.
The pillar member 13 of the fall prevention fence was a thinned wood having a diameter of 150 mm and covered a steel pipe having a diameter of 114.3 mm and a thickness of 4.5 mm.
[0011]
The portion embedded in the foundation concrete of the column member 13 is not covered with wood and remains a steel pipe.
When using reinforced wood in which the entire column is covered with half-timber, the portion embedded in the foundation 5 is covered with a heat-shrinkable synthetic resin tube to prevent corrosion.
[0012]
4 and 5 are enlarged views of the attaching portion of the column member 13 and the cross member 12. FIG. The steel pipe 4 is exposed by peeling the wood portion of the column member 13 and the bracket 6 is attached with a bolt, and the steel pipe 4 of the crosspiece 12 is fixed to the bracket 6 with a bolt. Put the buried wood into the peeled wood part and fix it with adhesive or sealant to prevent rainwater from entering.
[0013]
【The invention's effect】
The reinforced wood of the present invention has sufficient strength and high corrosion resistance, and when used as a fall prevention fence, it looks like a wooden fence using natural trees in a landscape, so it does not give an artificial feeling.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a reinforcing wood before assembly.
FIG. 2 is a cross-sectional view of reinforced wood.
FIG. 3 is a front view of a fall prevention fence using reinforced wood.
FIG. 4 is an enlarged front view of a connecting portion between a column member and a cross member of a fall prevention fence.
FIG. 5 is an enlarged side view of a connecting portion between a column member and a cross member of a fall prevention fence.
[Explanation of symbols]
1 ... wood 2 ... groove 3 ... adhesion groove 4 ... reinforcement pipe (steel pipe)
5 ... Foundation 6 ... Bracket 12 ... Crosspiece 13 ... Pillar

Claims (2)

Cover the reinforcing pipe with half-timber with a reinforcing pipe groove and an adhesive groove on the inner surface, and press the adhesive into the adhesive groove to integrate it into a pillar material and cross member. A fall-preventing fence with a synthetic resin covering the part buried in the foundation concrete. The fall prevention fence according to claim 1, wherein the synthetic resin is a heat-shrinkable resin tube.

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