JPS6183731A - U-shaped trench made of resin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a resin 11U-shaped groove.

(Prior Art and its Problems) U-shaped grooves having a U-shaped cross section are used for roadside ditches, farm waterways, and the like.

All conventional U-shaped grooves are made of concrete. However, concrete has a low tensile strength and is particularly vulnerable to point impact, so it has the problem of cracking or chipping caused by external forces. Reinforcing bars are inserted to compensate for this strength, but since the concrete itself has Naff 1, the overall weight is large, and during construction, it cannot be moved by one worker and must be lifted by a crane. The problem is that it is not only inferior in workability, but also highly dangerous.

Furthermore, since concrete requires a certain curing period, it takes a long time to manufacture, and a large area for curing is also required.

(Means for Solving the Problems) The present invention has been made to solve the above problems, and its purpose is to provide a lightweight and high-strength device that can be used safely, as well as to reduce the energy of water flow. The purpose of the present invention is to provide a resin U-shaped groove that also produces effects, and its feature lies in that at least the inner bottom surface is formed with wave-like irregularities that proceed approximately in the direction of fluid flow.

(Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a cross section of a U-shaped groove lO according to the present invention.

The U-shaped groove is integrally molded from a synthetic resin such as polyethylene resin, vinyl chloride resin, or FRP. A characteristic feature of the present invention is that the inner bottom surface 12 of the U-shaped groove 10 is formed into a wavy uneven surface that progresses in the direction of water flow, for example in the shape of a sine curve. The shape of the wave is not limited to a sine curve, but may be a continuous trapezoid as shown in FIG.

The shape of the outer bottom surface of the character 0 410 is not particularly limited, and may be a flat surface, but it is preferable that similar wavy irregularities are formed on the outer bottom surface as shown in the drawings. The unevenness of the outer bottom surface can prevent the U-shaped groove 10 from shifting, for example, when the U-shaped groove 10 is installed on a slope.

FIG. 4 shows another embodiment. In this embodiment, a concave groove 14 is formed at the center of the inner bottom surface, the bottom of which coincides with the concave bottoms of the wavy portions 12 on both sides. The earth and sand accumulated in the recessed portions of the corrugated portion 12 are discharged by the recessed grooves 14.

The groove 14 may be provided not at the center but along the edge of the inner bottom surface.

In FIG. 5, the groove 14 is arranged in a spiral shape on the inner bottom surface.

In each of the above embodiments, the uneven surface may be formed not only on the inner bottom surface but also on the side wall surface of the U-shaped groove 10.

The U-shaped grooves 10 can be joined by bringing the end surfaces of the U-shaped grooves 10 to be joined into contact and thermocompression bonding. Alternatively, an outwardly extending flange (not shown) may be provided on the end surface of the U-shaped groove 10, and the flange may be used for bonding with a suitable adhesive or for attaching a sealing member. They may also be connected and fixed using bolts through them.

Alternatively, as shown in FIG. 6, one end of the 0-shape m10 may be formed into a socket portion 16 into which the other end can be fitted, and the socket portion 16 may be joined.

Although the U-shaped groove 10 can be manufactured by injection, it can be easily manufactured by pressing a plate-shaped body. In the case of this press working, the plate-like body can be easily plastically deformed by heating the mold and pressing it.

Alternatively, the plate-like body may be heated in advance.

(Effect of the invention) According to the present invention, the following remarkable effects are achieved.

(1) Much lighter than concrete products.

Therefore, multiple sheets can be stacked and transported safely during transportation, and even a single worker can easily move and install them without having to lift them with a crane or the like during installation, making them extremely safe. Able to perform work.

(2) Since it is made of resin, it has excellent tensile strength and other strengths, and is less likely to crack or chip than concrete. Furthermore, since at least the inner bottom surface is formed into a wavy uneven surface, the wavy uneven surface exhibits a rib effect, increasing the strength and preventing deformation.

(3) The wavy uneven surface has a water flow reducing effect. Therefore, it can be suitably used on steep slopes.

(4) Unlike concrete, it does not require a curing period, so it can be manufactured in a short period of time and does not require a place for curing, and because it is lightweight, it can be stacked in many layers, so it does not require a large storage space.

(5) If the outer bottom surface is formed into an uneven surface, a slip-preventing effect will be produced when the device is installed on a slope.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a U-shaped groove according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is an explanatory diagram when the bottom surface is formed into a trapezoidal shape.
Fig. 4 is an explanatory diagram when a groove is formed in the center of the inner bottom surface, Fig. 5 is an explanatory diagram when a spiral groove is formed, and Fig. 6 is an explanatory diagram when a socket part is formed at one end. be. 10... U-shaped groove, 12... Inner bottom surface, 14...
Concave groove, 16... socket part.

Claims (1)

[Scope of Claims] 1. A U-shaped groove made of resin, characterized in that at least the inner bottom surface is formed into a wavy uneven surface extending substantially in the direction of fluid flow. 2. The resin U-shaped groove according to claim 1, wherein the outer bottom surface is also formed into an uneven surface.