JPS5832255B2 - Column materials for field athletic facilities - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a columnar material for field athletic facilities.

Recently, a new physical education system has been developed to train the mind and body in a natural environment by performing primitive exercises such as climbing trees, hanging from trees, jumping over tree stumps, carrying logs, and riding on log rafts. In other words, the implementation of a field athletics system is considered desirable for building a rich human spirit and a strong body, and the construction of this athletic facility is requested.

It is hoped that the construction of this facility will utilize the natural topography as it is, and that it will be constructed using natural logs and other timber as the main material, without using building materials that are incompatible with the natural environment or the type of exercise, such as concrete or iron. However, these days, as natural materials such as wood are in short supply, they are expensive and difficult to obtain in various sizes.

Furthermore, natural materials are prone to decay and cracks, resulting in poor durability and uneven strength, which poses problems in terms of safe use of facilities.

However, construction materials such as concrete and iron have the above-mentioned disadvantages, and need to be painted for appearance and rust prevention.

The present invention provides a columnar material suitable for constructing the above-mentioned field athletic facility, and its structure will be explained below with reference to the drawings.

As shown in Fig. 1, a metal wire 2 is inserted into the inner diameter hole of an outer cylinder 1 made of thermoplastic synthetic resin, such as hard vinyl chloride, and a filler material 3 such as concrete or styrofoam resin is filled. Join.

The outer cylinder 1 can be molded to any diameter and thickness without requiring special techniques using an extrusion machine or a special machine that combines this with an injection molding machine, and is also colored at that time.

It is effective to use a wire rod 2 wound spirally as shown in the figure in terms of bending and equalization of the arrangement, which will be described later.

The diameter of the spiral winding of this wire 2 is made slightly smaller than the inner diameter of the outer tube 1 for insertion.

Incidentally, the wire rod 2 may be formed by continuously forming an ordinary round bar-shaped material using a spiral winding machine.

When forming a curved portion in this way, by heating the cylindrical body from the outside to soften it, it can be bent into a desired shape and a desired curved body can be easily manufactured.

The filler 3 is Concrete IJ-1 if the product mainly requires mechanical strength, or Styrofoam resin if lightness and buoyancy (for example, for raft assembly) are required. Use selectively.

The outer cylinder 1 and the wire rod 2 are mass-produced in straight shapes with various diameters and lengths at a factory.

Next, the manufacturing method will be explained. A spiral wire rod 2 is inserted into the outer cylinder 1 from one end of the opening, and concrete is force-fed from the opening end using compressed air to fill the outer cylinder 1.

In addition, when filling the foamed styrene resin, the stock solution is appropriately poured after the wire rod 2 is inserted to cause a foaming reaction.

The above is about manufacturing a straight product, but when manufacturing a curved product as shown in Fig. 2, after inserting the wire 2 into the straight outer cylinder 1 as described above, the outer cylinder is heated. It is desirable to soften and bend it into a desired shape, and in that state fill it with the filler 3 as described above.

During this bending process, if the wire 2 is not a straight rod but a spiral, it will bend together with the outer cylinder, will not deviate greatly from the axis, and will strengthen the product with only a slight change in the arrangement spacing in the axial direction. , there is no problem in shape retention.

Now, in assembling the structure, a joint for the outer cylinder 1 is required.

Next, three typical types of coupling methods will be described.

Figure 3 is an example of a T-type connection of two pipe-shaped materials with different diameters.
In this case, a hole is made in the large-diameter outer cylinder 1 that matches the connection end of the small-diameter outer cylinder 1, and the large-diameter outer cylinder 1 is fitted into the hole and fixed by welding.

FIG. 4 shows an example of a T-type connection of three outer cylinders 1 of the same diameter, and FIG. 5 shows an example of a T-type connection of three pipes 1 of different diameters.

4. 4', 4'' are joint cylinders, and each outer cylinder 1 is inserted into each socket, and the fitting parts are firmly fixed with adhesive.

The fitting portions of the joint tubes 4' and 4'' are also fixed in the same manner.

In addition, FIG. 3 shows the state in which the wire rod 2 is inserted after each outer cylinder 1 is connected, and the filler material 3 is continuously filled after this, and FIGS. The figure shows a state in which ready-made materials are connected using a chisel, but sufficient connection strength can be obtained by either method.

As explained above, the present invention provides a metal spiral whose outer periphery is close to the inner wall of the inner diameter hole of the outer cylinder made of thermoplastic synthetic resin and whose both ends are left open and whose diameter is the same over the entire length. A wire rod wound into a shape is inserted into the cylindrical body, and a filler such as concrete or foamed synthetic resin is filled and bonded to the cylindrical body, so that columnar materials for field athletic facilities of various shapes can be formed easily and inexpensively. , has excellent durability and does not change over time.

Also, when filled with concrete, it has high strength, making it ideal for athletic facilities that require high strength, while when filled with foamed resin, it is lightweight and has high buoyancy, making it suitable for assembling rafts.

In addition, since manufacturing can be easily carried out outdoors or in the mountains, and joint connections during assembly are made strong, construction of field athletic facilities can be carried out appropriately in a short period of time.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing a first embodiment of the columnar material for feed athletic facilities according to the present invention, Fig. 2 is a longitudinal sectional view showing the second embodiment, and Figs. 3 to 5 are joints thereof. It is a longitudinal cross-sectional view showing each side. 1... Outer cylinder, 2... Wire rod, 3...
...Filling material.

Claims (1)

[Claims] 1. Insert a spirally wound metal wire whose outer periphery is close to the inner wall of the inner diameter hole of an outer cylinder made of thermoplastic synthetic resin with both ends left open and having the same diameter over the entire length. A columnar material for field athletic facilities, characterized in that a filler such as concrete or foamed synthetic resin is filled and bonded into the cylinder.