JPH0626297Y2 - The outer wall of the tennis court - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is mounted on a peripheral wall surface arranged around a tennis court, and a tennis ball flying in the wall surface direction is conveniently repelled in the tennis court direction. , About the outer wall surface of the tennis court.

[Conventional technology]

In a tennis court with a wall surrounding the ground and multiple tennis courts lined up inside the ground, there is no partition wall between adjacent tennis courts. If there is a wire mesh fence behind the back line and the seat is stretched to a height of about 1 m above the fence, or behind the back line of each tennis court is about 1 m above the ground. In the case where the wall is made of concrete, wooden boards, etc. and the upper part is a wire mesh fence, when the hit ball flies diagonally to both side parts of the back wall surface of the backline during the collision,
The hit ball will bounce back toward another adjacent tennis court. As a result, play must be interrupted in order for the player to pick up the rebounded tennis ball, and when the tennis ball rolls in the adjacent court or its service area, There are inconvenient circumstances such as the above play being interrupted.

In order to eliminate such inconvenience, Japanese Utility Model Publication No. 1-37653 (Japanese Utility Model Application Laid-Open No. 63-852) filed by the present applicant.
No. 74), a repelling member 40 formed of a depressurizing material having a tall triangular prism shape as shown in FIG. 4 is opposed to a ridgeline 42 of the repelling member 40 with its longitudinal direction being the vertical direction. The back side of the tennis courts A and B arranged side by side through the sheet-like body 44 or directly, as shown in Fig. 5 and a front view of the tennis court, respectively. There is disclosed a device in which a plurality of side wall surfaces behind the line are mounted side by side to form the surface mount body 46.

By providing such a cover body 46 at an appropriate position on the peripheral wall surface of the tennis court, for example, a hit ball flying from the tennis court A to the rear position on the right side of the back line is 1. As shown in FIG.
The ball hits the first collision surface 48 of the tennis court A facing the court A at a certain angle as shown by the solid arrow, and the momentum of the hit ball is appropriately attenuated to bounce in the direction shown by the dotted arrow. Returning, the tennis ball T returns to the direction of the tennis court A. Further, the hit ball flying from the tennis court B to the rear position on the left side of the back line collides with the second collision surface 50 facing the tennis court B at a certain angle, and the tennis court is hit. It bounces back in the direction of B. On the other hand, as shown in FIG. 7-2, the tennis ball T flies in the middle of the adjacent repelling members 40 and the first collision surface 48 of each repelling member 40 as shown by the solid line arrow. And the second collision surface 50, the tennis ball does not bounce back in the direction indicated by the dotted arrow and bounce back in the direction of another court adjacent to the court in which the player is playing.

In this way, the hit ball hitting the back wall surface of the back line of each tennis court and bouncing in the direction of the other adjacent court can be reduced at a considerable rate, and the conventional annoyance and inconvenience are greatly reduced. It was.

[Problems to be solved by the device]

By the way, in order to attach the cover 46 to the peripheral wall surface of the tennis court, a large number of tall triangular prism-shaped repelling members 40 are arranged such that their longitudinal directions are vertical, and are aligned and fixed on the vertical wall without any gaps. It is necessary to carry out the installation work, which requires considerable time and labor. Especially, in a tennis court field having a lot of tennis courts, the installation work becomes more difficult.

Further, the repelling member 40 as shown in FIG. 4 is entirely formed into a tall shape, for example, a triangular prism shape having a length of about 1 m, by a hard sponge material such as a foaming polyethylene which is a damping material. However, there is a problem that the manufacturing cost is high because the manufacturing cost is high and the expandable polyethylene is relatively expensive.

The present invention has been made in view of the above circumstances, is easy to attach to the peripheral wall of the tennis court, the manufacturing process is relatively simple, and mass production is easy. It is a technical subject to provide a cover body whose manufacturing cost is low.

[Means for Solving the Problems]

In this invention, as means for solving the above problems,
At least the surface layer is formed from a single plastic flat plate made of a damping material by vacuum forming, blow molding, or the like to form a cover for the peripheral wall of the tennis court. By the molding process, a plurality of triangular prismatic projections that extend in the height direction by intersecting two flat surfaces of the same shape on the front surface side are provided in the horizontal direction. They are formed in parallel so that the diameter is equal to or larger than the diameter.
The outer body thus formed is attached by wearing the back surface of the outer body on the peripheral wall surface of the tennis court.

The plastic flat plate can be formed by laminating and joining a thick hard sponge sheet material that is an elastic body on one side of a plastic thin plate material that is a rigid body.

[Action]

The cover body having the above-described structure can be easily attached by simply putting the back side of the integrated body on the peripheral wall surface of the tennis court.

In addition, this surface mount body uses a predetermined mold, and in the state where one plastic flat plate is heated and softened, vacuum suction is made to adhere to the mold, or air is blown to inflate it into a convex shape. Since it is manufactured by molding and processing,
The manufacturing process is relatively simple, and mass production is easy. Moreover, since the whole of this cover is thin plate-like, the amount of the hard sponge material such as expandable polyethylene used should be the one using the repelling member in which the whole of the elongated triangular prism shape is made of the hard sponge. Compared to it, less is required.

The surface mount is configured such that the interval between the front edge ridges of adjacent ones of the plurality of triangular prismatic protrusions formed on the surface side thereof is equal to or greater than the diameter of the tennis ball, and at least the surface layer portion. Is formed of a depressurizing material, the ball hitting toward this cover is a pair of triangular prism-shaped protrusions, just as in the case of the repellent member of the conventional cover described above. Of the plane, it collides with the plane facing the tennis court on the side where you are playing, repels in the direction of the tennis court you are playing, and the impact of the energy-reducing material causes the ball to collide. The momentum will be appropriately reduced. Further, since at least the surface layer portion of the cover body is formed of the energy-reducing material, even if the player bumps into the cover body, no injury will occur.

〔Example〕

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

1 to 3 show an embodiment of the present invention.
The figure is an overall perspective view of the cover on the peripheral wall of the tennis court,
2 is a vertical sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a horizontal sectional view taken along the line III-III in FIG.

This cover body is composed of a rectangular plate-shaped body 10. This plate-shaped body 10 is a thin plastic plate material such as a rigid body, for example, a support plate 12 made of polypropylene. A hard sponge sheet material, for example, a repellent surface layer sheet 14 made of expandable polyethylene is laminated and joined. The size of the plate-shaped body 10 is, for example, 1 m × 1 m
The thicknesses of the support plate 12 and the repellent surface layer sheet 14 are, for example, 5 mm and 20 mm, respectively.

The plate-like body 10 has a surface partly protruding, and a plurality of (four in this embodiment) triangular pillar-shaped convex portions 16 are formed in parallel in parallel with each other in the horizontal direction. The back surface side is recessed in a shape corresponding to the triangular columnar convex portion 16. The triangular pillar-shaped convex portion 16 is entirely tall and has a cross section of an isosceles triangle.
The apex angle 20 formed by the intersection of the sides 18 and 18 'is approximately a right angle. To give an example of the dimensions of each part of the triangular columnar convex part 16, the lengths of the two sides 18 and 18 'in the cross section are 16.3 cm and the apex angle is 20.
Has a length of 23 cm, the height from the midpoint to the apex of the bottom 22, that is, the protrusion height of the triangular columnar convex portion 16 to the front is 11 cm, and the total length (height) is less than 1 m. . Then, the two side surfaces of the same shape in which the areas of the triangular columnar convex portions 16 are the same form the first collision surface 24 and the second collision surface 26. Further, the distance between the front edge lines 28 formed by the intersections of the first collision surface 24 and the second collision surface 26 of the adjacent triangular columnar convex portions 16 is equal to or more than the diameter of the tennis ball, for example, 25 cm. It is said that.

The mounting body having the above-mentioned configuration is a plastic flat plate formed by laminating a plastic sheet of polypropylene or the like and a hard sponge sheet of expandable polyethylene or the like and joining the plastic flat plate with a predetermined mold. In the state where it is heated and softened, vacuum suction is performed through a large number of air suction holes formed in the mold to bring the softened plastic plate into close contact with the mold, or blow air into the softened plastic plate. It is manufactured by molding such as bulging one side into a convex shape.

Incidentally, a weather-resistant resin sheet is further laminated on the surface of the repellent surface layer sheet 14 and joined to form a three-layer structure.
The surface of 14 may be protected.

In this surface mount, the side on which the triangular columnar convex portions 16 are formed is the front side, each ridge line 28 direction of the triangular columnar convex portions 16 is the vertical direction, and the rear surface side is covered with the peripheral wall surface of the tennis court. It can be worn and attached. It should be noted that the triangular columnar convex portion 16 of this surface layer body
Corresponds to the repelling member 40 of the conventional cover body, and the operation of the triangular columnar convex portion 16 also has the repelling member 40 of the conventional cover body described with reference to FIGS. 7-1 and 7-2. Since it is exactly the same as the case in 1, the description thereof will be omitted here.

[Effect of device]

Since the present invention is constructed and operates as described above, the cover body according to the present invention is easy to install on the peripheral wall of the tennis court, has a good work efficiency, and has a large number of tennis courts. Especially at tennis courts, the effect is great, and the manufacturing process is relatively simple.
It is easy to mass-produce and the manufacturing cost is low.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a cover body on a peripheral wall surface of a tennis court according to an embodiment of the present invention, and FIG. 2 is II of FIG.
-II longitudinal sectional view, FIG. 3 is a III-III transverse sectional view of FIG. 1 showing a part of the cover body, FIG. 4 is a perspective view showing a conventional cover body, and FIG. , A partial plan view showing a state where the cover body shown in Fig. 4 is attached to the rear wall surface of the tennis courts arranged in parallel, Fig. 6 is its front view, Fig. 7-1 and Fig. 7
-2 is a figure for demonstrating the situation where the tennis ball which collided with the cover body rebounds. 10 …… plate-like body, 12 …… support plate, 14 …… repellent surface layer sheet, 16 …… triangular prismatic protrusions, 24,26 …… collision surface, 28 …… front end ridge.

Claims (2)

[Scope of utility model registration request] 1. At least a surface layer portion is formed by processing from a single plastic flat plate formed of a depressurizing material, and a triangular columnar convex portion extending in the height direction is formed on the surface side so that two flat surfaces having the same shape intersect each other. A plurality of them are formed in parallel in the horizontal direction so that the distance between the front edge lines that are parallel to each other and adjacent to each other is equal to or more than the diameter of the tennis ball,
The outer wall of the tennis court is a front cover body, which is characterized in that the back side is worn on the peripheral wall of the tennis court. 2. The tennis court ground according to claim 1, wherein the plastic flat plate is formed by laminating and joining a thick hard sponge sheet material which is an elastic body on one side of a plastic thin plate material which is a rigid body. Peripheral wall surface.