JPH044963Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a net height measuring device for sports such as volleyball and badminton.

Conventionally, the tension height of a volleyball net, for example, has been measured using a tape measure. However, when measuring with a tape measure, the tape measure itself does not stand upright, so it must be supported in a straight position, making it difficult for one person to measure, resulting in poor workability and a tendency for errors to occur.

In view of these conventional drawbacks, the present inventor has made extensive efforts to provide a net height measuring device for sports competitions that eliminates the above-mentioned drawbacks.

The present invention will be described below with reference to the drawings.

In the drawings, reference numeral 1 denotes a base column made of light metal such as aluminum, synthetic resin such as glass fiber reinforced plastic, wood, or the like. The base pillar 1 is a hollow elongated body having an appropriate shape such as a rectangular, circular, oval, or polygonal cross section. Further, as shown in FIG. 1, the surface of the base column 1 is normally provided with scales 11 that gradually increase in size along the length direction from the lower end to the upper end.
This scale 11 does not necessarily have to be provided.

Reference numeral 2 denotes a telescopic column, which is made of the same material as the base column 1. The cross-sectional shape of the extensible column 2 is substantially the same as that of the base column 1, and the diameter thereof is smaller than that of the base column 1. The telescopic column 2 is slidably inserted into the base column 1 so as to protrude from the upper end of the base column 1, and is inserted into the base column 1 by a stopper 3 (described later) at a predetermined sliding position.
It is designed to be fixed. Further, an abutment plate 21 is provided horizontally protruding from the upper end of the extensible column 2, and a scale 22 that gradually increases along the length direction is provided on the surface of the extensible column 2, with the bottom surface of the abutment plate 21 as a starting line 23. has been done. That is, the contact plate 21 is provided to protrude from the upper end of the telescopic column 2 toward the side where the scale 22 is provided. Scale 2
The starting line 23 of No. 2 is marked with a scale equal to the length of the base pillar 1. For example, in the case of Figure 1, base pillar 1
As can be seen from the scale at the top of base pillar 1, the length of
130cm, and this 130cm scale display is directly used as the starting line 23 of the scale 22 of the telescopic column 2, and the scale 22
is made to gradually increase toward the lower end of the telescopic column 2. That is, the height from the lower end of the base column 1 to the lower surface of the abutting plate 21 can be measured by reading the scale 22 of the telescopic column 2 at the upper end of the base column 1.

The stopper 3 is for fixing the telescopic column 2 to the base column 1, and the stopper 3 consists of a stopper pin 31 supported by the telescopic column 2 and a plurality of locking holes 34 drilled in the base column 1. The stopper pin 31 is supported by a support body 33 fixed to the telescopic column 2 via a coil spring 32. That is,
The stopper 3 is a support 3 fixed within the telescopic column 2.
A coil spring 32 and a stopper pin 31 are supported within the base column 3, and the elasticity of the coil spring 32 causes the stopper pin 31 to protrude from the side surface of the telescoping column 2 and to be fitted into the locking hole 34 of the base column 1. . Further, in order to fix the telescopic column 2 to the base column 1 at a plurality of predetermined positions, a plurality of locking holes 34 are bored along the length direction of the base column 1. Here, the above-mentioned plurality of predetermined positions refer to positions where the telescopic column 2 is fixed in accordance with the net height determined by the rules of various sports such as badminton and volleyball.

Next, to describe how to use the measuring tool of the present invention, first pull out the telescopic column 2 from the base column 1 according to the required net height, and then
1 into a predetermined locking hole 34 of the base column 1, the telescopic column 2 is fixed to the base column 1. Then,
As shown in Fig. 4, one person holds the base column 1 and the telescopic column 2 almost perpendicularly along the net, and another person holds the base column 1 and the telescopic column 2 along the net until the upper end of the net 4 comes into contact with the lower surface of the contact plate 21 at the upper end of the telescopic column 2. Tighten the rope of net 4,
All you have to do is set it up.

As described in detail above, in the measuring tool of the present invention, a telescopic pillar is slidably inserted into a hollow base pillar so as to protrude from the upper end of the base pillar, and a stopper pin supported by the telescopic pillar and the base pillar are connected to each other. The telescopic column is fixed to the base column at a plurality of predetermined positions by the stopper, which is made up of a plurality of drilled locking holes, so the stopper pin is fixed by selecting the plurality of locking holes as appropriate. By just fitting it in, the distance from the bottom end of the base column to the bottom surface of the abutting plate at the top end of the telescopic column can be adjusted to match the different net heights specified by competition rules, and simply by standing it vertically. The height of the net can be easily measured by one person, and when not in use, the telescopic column can be contracted to make it compact, making it convenient for storage and transportation.

In addition, since the contact plate is protruded almost horizontally from the upper end of the telescopic column, the net can be easily stretched to a predetermined height by pulling up the net until the upper end of the net contacts the bottom surface of the contact plate. can.

Furthermore, the telescopic column is marked with progressively larger scales along its length, starting from the bottom surface of the contact plate, and the starting line of the scale is equal to the length of the base column. The height when extended can be easily measured by reading the scale on the telescopic column at the top of the base column. In other words, nets for volleyball, badminton, etc. are usually set up higher than your height, so if you make the length of the base shorter than your height, you can adjust the height of the net from the floor to the top of the net to make it easier for people to reach. Can be read at the top.

Furthermore, since the contact plate is horizontally protruded from the upper end of the scaled side of the telescopic column, it is possible to read the height of the telescopic column at the upper end of the base column and connect the upper end of the net to the bottom surface of the contact plate. Confirmation of contact can be performed from the same direction, making it easy to operate.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the measuring device of the present invention, Fig. 2 is a side view of the measuring device of Fig. 1, Fig. 3 is a sectional view taken along the line shown in Fig. 1, and Fig. 4 is a cross-sectional view of the measuring device of the present invention. FIG. 3 is an explanatory diagram showing how the measuring tool is used. 1... Base column, 11... Scale, 2... Telescopic column, 2
1...Abutting plate, 22...Scale, 23...Starting line, 3
...stopper, 31...stopper pin, 32
... Coil spring, 33 ... Support body, 34 ... Locking hole, 4 ... Net.

Claims (1)

[Scope of utility model registration request] A telescopic pillar 2 is slidably inserted into a hollow base pillar 1 so as to protrude from the upper end of the base pillar 1, and a stopper pin 31 supported by the telescopic pillar 2 and a plurality of stopper pins 31 bored in the base pillar 1 are inserted into the hollow base pillar 1 so as to protrude from the upper end of the base pillar 1. The telescopic column 2 is fixed to the base column 1 at a plurality of predetermined positions by the stopper 3 consisting of a plurality of locking holes 34.
An abutting plate 21 is horizontally protruded from the upper end, and the length of the abutting plate 21 is gradually increased along the length of the extensible column 2 on the side from which the abutting plate 2 is protruded, with the lower surface of the abutting plate 21 as a starting line 23. This net height measuring tool for sports competitions is provided with a scale 22 and a starting line 23 of the scale 22 is equal to the length of the base 1.