JP2000176074A - Precast concrete half pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a half pipe strong and improved in durability by setting half pipe units with the inclined parts thereof being in contact to each other, forming a step having a handrail raised thereon on the upper ends of the inclined parts, and providing a ladder extending from the step surface to the ground surface. SOLUTION: A precast concrete half pipe is formed out of four half pipe units 1, whose support parts 3 having quarter cylindrical inclined parts 2 are placed on the ground surface and in contact to each other. A flat and horizontal step surface 4 is formed on the upper surface of the inclined parts 2, and a handrail 6 is raised thereon. Timbers may be laid on the step surface 4. It is preferred from the point of safety to affix a cushioning material 5 consisting of rubber to the angle part in the boundary between the inclined parts 2 and the step surface 4. A ladder is provided on the outer wall of the support part 3 to go up to and down from the step surface 4. According to this, a half pipe easy to move and remove and strong can be provided, and the durability 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 half pipe mainly used for skateboarding practice and competition.

[0002]

2. Description of the Related Art Conventionally, competitions and exercises such as skateboarding have been carried out on a flat ground such as a road or a semi-cylindrical slide which is called a half pipe. This half pipe is formed by combining structural materials such as wood and steel pipe, and bending and stretching a plywood or the like into a semi-cylindrical shape to form a semi-cylindrical inclined portion.

[0003]

However, in the half pipe as described above, since the inclined portion is made of a wooden plate, the rigidity of the inclined portion is insufficient, and the inclined portion is bent during skateboarding practice or competition. Problem. Further, when the half pipe is installed outdoors, there is a problem that a wooden plate constituting the inclined portion is easily rotten.

The inventor of the present invention has conducted intensive studies in view of the conventional disadvantages, and as a result, has provided a half-pipe which is robust and excellent in durability.

[0005]

According to the present invention, there is provided a half-pipe made of precast concrete, wherein a half-pipe unit comprising a quarter-cylindrical inclined portion and a support portion erected on the edge of the inclined portion is disposed on the ground surface. In the half pipe, the lower ends of the inclined portions of the pair of half pipe units are in contact with each other to form a semi-cylindrical inclined portion, and a flat surface is formed at the upper end of the inclined portion to form a step surface. And
A handrail is erected at the upper end of this step surface, and a ladder is provided from this step surface to the ground surface, half pipes can be easily formed just by arranging a half pipe unit on the ground surface, it is robust and durable Excellent.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of an embodiment of the precast concrete half pipe of the present invention. In this example, the precast concrete half pipe is composed of four half pipe units.
The half-pipe unit is composed of a quarter-cylindrical inclined portion and a support portion provided at the edge of the inclined portion. It is in contact with and has a semi-cylindrical shape.

[0007] The half-pipe unit is made of precast concrete, and a quarter-cylindrical inclined portion has a flat surface. Although the surface of the inclined portion may be a concrete surface, wood, synthetic wood, synthetic resin, or the like may be laid. A flat horizontal surface is formed at the upper end of the inclined portion to form a step surface. This step surface may be a concrete surface, but may be laid with wood, synthetic wood, synthetic resin, or the like. It is more preferable for the safety of the athlete to attach a cushioning material such as rubber to the corner at the boundary between the inclined portion and the step surface.

[0008] A handrail is provided on the step surface so that a competitor does not jump out of the half pipe.
In addition, a ladder is provided on the outer wall of the support portion, so that the competitor can easily climb the step surface.

The pair of half pipe units may be installed in contact with each other as described above. However, if the half pipe units are fixed with bolts penetrating the contact surface, the half pipe unit is less likely to be displaced and a more preferable half pipe is formed. . The half-pipe can be installed on the ground surface by placing the half-pipe on the foundation work such as Kuriishi and fixing the lower part of the support part, but placing the half-pipe on a flat surface If you leave
The half pipe can be easily moved and removed when unnecessary.

[0010]

As described above, in the precast concrete half pipe of the present invention, at least one half-pipe unit comprising a quarter-cylindrical inclined portion and a support portion erected on the edge of the inclined portion is disposed on the ground surface. In the provided half pipe, the lower ends of the inclined portions of the pair of half pipe units are in contact with each other to form a semi-cylindrical inclined portion, and a flat surface is formed at the upper end of the inclined portion. It is made a step surface, and a handrail is erected on the upper end of this step surface,
A ladder is provided from this step surface to the ground surface. A half pipe can be easily formed simply by arranging a half pipe unit on the ground surface, and is robust and excellent in durability.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a precast concrete half pipe of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Half pipe unit 2 Inclined part 3 Support part 4 Step surface 5 Buffer material 6 Handrail 7 Ladder

Claims (1)

[Claims] 1. A half pipe having at least one pair of half pipes comprising a quarter-cylindrical inclined portion and a support portion erected on the edge of the inclined portion, wherein the pair of half pipes is provided. The lower ends of the inclined portions of the pipe unit are in contact with each other to form a semi-cylindrical inclined portion, and a flat surface is formed at the upper end of the inclined portion to form a step surface, and a handrail is formed at the upper end of the step surface. A half-pipe made of precast concrete, which is erected and provided with a ladder from the step surface to the ground surface.