JPS6142632Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the creation of a tennis court configured to allow installation of a batting practice pitching machine.

BACKGROUND ART Recently, it has become common to practice tennis using a batting practice pitching machine (commonly known as an automatic tennis machine).

Batting practice pitching machines are generally installed on a type of simulated tennis court called an automatic tennis court, which is a scaled-down version of a normal tennis court, due to land cost considerations. It is desirable that the system be installed in As is well known,
One tennis court requires an area of ^800m2 , and in terms of land costs and court construction costs, the court in this case must be compatible with a regular tennis court.

However, it has not been practical to make a regular tennis court compatible with an automatic tennis court for the following reasons.

B. Simply put, if a batting practice pitching machine is movably installed on a regular tennis court, it can be used interchangeably with an automatic tennis court. However, since the court is flat in this case, the balls that are hit back easily spread out, and a staff member is required to collect the balls and feed them to the batting practice pitching machine, which is not efficient. In such cases, the ball that was hit back could directly hit the official, which was dangerous.

(b) In order to automatically collect the ball, it is sufficient to form an inclined surface C' facing the batting practice pitching machine M on the surface of the court C as shown in Fig. 1. but,
In this case, if the slope C' is formed in front of baseline B (pointing towards the inside of the court - the same applies hereafter), it will naturally interfere with normal tennis play, and even if it is behind baseline B, it will not be possible to play normal tennis. For tennis play, an open space of at least 10 meters behind the baseline is required, so it must be built further back than this open space, which poses a problem in terms of land cost.
If a slope is formed further back than m, there is a risk that safe balls bouncing in front of the baseline will not reach the ball, and a recovery effect cannot be expected, and the batting practice pitching machine will also be too far away from the baseline, making it difficult to pitch well.

The purpose of this invention is to provide a tennis court that is compatible with a normal tennis court and an automatic tennis court without causing the above-mentioned inconveniences, and has the following configuration.

In other words, in the tennis court of this invention, the open space behind the baseline is created as a step lower than the court surface, and a lid with a hinge section on the edge of the court is attached to this step so that the surface is flush with the court surface when closed. The court is constructed so that it can be opened and closed, and a batting practice pitching machine is movably installed on this stepped section.When used as an automatic tennis court, the lid is opened to reveal the stepped section on the court surface. When the court is used as a normal tennis court, the batting practice pitching machine is moved outside the court, the lid is closed, and the court surface is made flat, thereby making the two courts compatible.

Next, a specific embodiment of this invention will be described based on the accompanying drawings.

First Embodiment FIGS. 2 and 3 are perspective views of the main parts of the tennis court of this invention.

In the figure, reference numeral 1 denotes a stepped portion, which is formed behind the baseline B of the court C. It is desirable to provide this stepped portion 1 with a mortar-shaped inclined surface facing toward the batting practice pitching machine in order to enhance the ball collecting effect.

Reference numeral 2 designates a lid for covering the stepped portion 1, which is provided on the stepped portion 1 so as to be openable and closable by providing a hinge portion 2a on the coat end side so as to open toward the baseline B side.
In this embodiment, the lid 1 is configured to be opened and closed by a hydraulic cylinder 2b.

Since this lid 1 becomes a part of the court when it is closed, it is necessary to configure the lid 1 so that its surface is located on the same plane as the court surface, and it is desirable to apply the same paving as the court surface. Further, it is desirable that a cushioning material 9, such as a net, be provided on the back surface of the lid 1 in order to prevent the ball hit back from rebounding more than necessary and flying out of the stepped portion 1.

M is a batting practice pitching machine, and in this embodiment, a support 3 having an overhanging part 4 at the upper end is installed on the court C at the rear of the hinge part 2a of the lid 2, and the batting practice pitching machine is installed from this overhang. By suspending M so that it can be raised and lowered, it is used as a means of moving the batting practice pitching machine M.

Furthermore, in this embodiment, a batting practice pitching machine M is fixed to the lower end of the screw 5 as a hanging and elevating means,
The overhang 4 has a female screw 6a corresponding to the screw 5.
A rotary ring 6 provided on the inner circumference is rotatably fitted, and a worm wheel 6b is provided on the outer circumference of the rotary ring 6 to mesh with a worm 7a rotated by a motor 7. The practice pitching machine M is configured to be moved up and down (see Fig. 5). In the figure, reference numeral 5a denotes a guide lever for preventing the screw 5 from rotating along the rotation ring 6.

In addition, when using the batting practice pitching machine M, it is suspended at an arbitrary height, but in this case, in order to prevent unnecessary loads from being applied to the screw 5, a mounting table 8 as shown in the figure is installed. You may also prepare (No. 4
(see figure). This mounting table 8 includes a side plate 8a and a top plate 8b.
One side of the side plate 8a and the top plate 8b are connected by a hinge 8c, the other side of the side plate 8a is connected to the step 1 by a hinge 8d, and the other side of the top plate 8b is connected to the lid 2 by a hinge 8e. By connecting them with each other, they are configured to be assembled and folded as the lid 2 is opened and closed.

In this embodiment, when used as a normal tennis court, the batting practice pitching machine M is raised above the upper end of the lid 2 and moved outside the step 1, and then the lid 2 is closed to cover the step 1. . In this case, the batting practice pitching machine M may be kept at the upper end position or may be lowered to the surface of the lid 2.

Second Embodiment FIG. 6 is a partial sectional view showing the main parts of a second embodiment of the tennis court of this invention.

In this embodiment, a recess 11 capable of accommodating a batting practice pitching machine M is provided in the stepped portion 1, and the batting practice pitching machine M is attached to this depression 11 so as to be movable up and down, thereby serving as a means for moving the batting practice pitching machine M. This is different from the first embodiment in this point.

In this case, the batting practice pitching machine M has a hydraulic cylinder 1.
2 shall be used for raising and lowering. In the figure, 12a is a pantograph mechanism for preventing loads other than the axial direction from being applied to the cylinder 12.

In this embodiment, when used as a normal tennis court, the batting practice pitching machine M is installed in the recess 11.
After being moved and accommodated by lowering the lid 2 into the container, the lid 2 is closed to cover the stepped portion 1.

This invention is constructed as described above and has the following effects.

(b) When used as an automatic tennis court, the stepped section appears behind the baseline, so the balls roll onto this stepped section and are easy to retrieve; if the batting practice pitching machine is equipped with an automatic ball feeding mechanism, no staff is required. It is efficient and safe.

(b) In this case, since the stepped portion becomes a court surface when the lid is closed, it is possible to install the stepped portion close to the baseline, making effective use of the land, and also providing better pitching than with a batting practice pitching machine. Can be done.

C. If you move the batting practice pitching machine and close the lid, you can use it as a normal court, so the land can be used effectively, and even when used as an automatic tennis court, the area beyond the terrace is exactly the same as a normal court, so it can be used for actual matches. This allows you to practice in a timely manner.

[Brief explanation of drawings]

Figure 1 is a perspective view of the conventional technique assuming that a batting practice pitching machine is installed on a normal tennis court, and Figure 2 is a perspective view of the main parts of the tennis court of this invention used as an automatic tennis court. Figure 3 is a perspective view of the main parts of the tennis court of this invention used as a normal tennis court.
Fig. 4 is a perspective view showing the table 8 part, Fig. 5 is a partial sectional view showing the overhanging part 4 part, and Fig. 6 is a partial sectional view of the main part showing the second embodiment of the tennis court of this invention. It is a diagram. In addition, the numbers in the figure match, M... batting practice pitching machine, C...
Court, B... Baseline, 1... Step section, 2...
... Lid, 2a... Hinge part, 3... Support column, 4... Overhanging part, 11... Recess.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. The vacant land behind the baseline is created as a step lower than the court surface, and this step has a lid with a hinge section on the edge of the court, whose surface is the same as the court surface when closed. A tennis court characterized in that the tennis court is provided so as to be openable and closable so as to be located on a flat surface, and further, a batting practice pitching machine is movably installed on the stepped part. 2. A support having an overhang at the upper end is installed behind the hinge between the lid and the step, and the batting practice pitching machine is suspended from this overhang so that it can be raised and lowered, thereby making it possible to move the batting practice pitching machine. A tennis court according to claim 1 of the claimed utility model registration. 3. Scope of Utility Model Registration Claim Paragraph 1: A recess capable of accommodating a batting practice pitching machine is provided in the step part, and the batting practice pitching machine is movable by being attached to the depression so that the batting practice pitching machine can be raised and lowered. Tennis court listed.