JPS6217093Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a table tennis net tensioning device that can arbitrarily adjust the height of the table tennis net.

A conventional tensioning device for tensioning a table tennis net has a structure in which a post and an engaging device are integrated. Therefore, the post height itself may vary due to product variations, and when net tension strings are stretched across both posts of a table tennis table, the tension may loosen or loosen depending on whether the net tension strings are old or new. It was very hot. Therefore, it was necessary to untie the knots on the net tensioning strings, re-stretch the net, and adjust the net height each time. This task was extremely troublesome for the competitors.

Therefore, the present invention eliminates all of these drawbacks, allows the net height to be easily and arbitrarily adjusted even after the net tension string is stretched on the post engagement tool, and furthermore, the height of the net can be easily and arbitrarily adjusted. To provide a table tennis net tensioning device capable of absorbing variations in post height due to variations.

Therefore, the feature of the present invention is that the net height adjustment screw has a hole penetrated in the axial direction and has a head with anti-slip processing on the outer peripheral side and is screwed into the upper part of the post. , an engaging tool for a net tension cord, which has a large diameter portion formed smaller than the head of the adjustment screw, and a small diameter portion that is rotatably fitted loosely into the hole of the adjustment screw; is provided, and in a state where the net tension string is stretched along the net and the post via the engagement tool, the string is attached to the outer peripheral side surface of the head which has been subjected to the anti-slip processing. It lies in the points configured to be multiplied.

Hereinafter, the present invention will be explained in detail based on the embodiments shown in the figures.

Reference numeral 1 denotes a cylindrical post, and a cylindrical threaded tube 3 whose inner surface is threaded over most or the entire length is installed inside the tip 2 of the post 1. The screw tube 3 may be attached by spot welding, or an adhesive may be applied to the outer peripheral surface of the screw tube 3 and adhered to the inner surface of the post 1. Furthermore, the threaded tube 3 may be inserted into the post 1 and external pressure may be applied to the outside of the post 1 to bring the post 1 and the threaded tube 3 into pressure contact. Note that the cross-sectional shape of the post 1 is not limited to a cylindrical shape, but may be any shape such as a polygon. Furthermore, the entire post 1 does not need to be hollow as long as it has a shape that allows the screw tube 3 to be attached to the tip. Next, the adjustment screw 4 is screwed into the screw tube 3. The adjusting screw 4 includes a threaded portion 5 and a head 6, and has a hole 7 extending in the axial direction. The outer peripheral side portion 8 of the head 6 is subjected to anti-slip processing such as knurling. The shape of the head 6 is not limited to a cylindrical shape as shown in FIG. 3, but may be a polygon such as a hexagon. Further, an engaging member 9 is provided on the adjusting screw 4. Specifically, the engagement tool 9 has a shaft shape consisting of a large diameter portion 10, a medium diameter portion 11, and a small diameter portion 12, and the small diameter portion 12 is loosely fitted into the hole 7. Therefore, the engagement tool 9 is rotatably provided within the adjustment screw 4. Then, the tip 13 of the small diameter portion 12 is caulked to form a flange 14, and the flange 14 is hooked to the end 15 of the adjustment screw 4. Place them with a small gap between them. Further, in the upper surface 17 of the large diameter portion 10, a groove 19 for guiding the net tension string 18 is provided.
is formed. The number of grooves 19 may be one or several in the diametrical direction of the large diameter portion 10. Further, the large diameter portion 10 is formed to be smaller than the diameter of the head 6 of the adjustment screw 4. However, Net20
The net tension cord 18 attached horizontally at the top is
It is inserted into the groove 19, and the tip is further suspended,
The adjusting screw 4 is in contact with the outer circumferential side surface 8 of the head 6 which has been subjected to anti-slip processing such as knurling, and is hooked and tensioned at the lower part along the post 1. be. This makes it possible to prevent the adjustment screw 4 from rotating freely due to vibration or the like after tensioning. Therefore, the height of the Net20 will not fluctuate during the competition. Further, in the hooking part 21 of the lower part of the post 1 shown in FIG. 5, a U-shaped fixing piece 22 is fixed to a tensioner main body 23. The center portion 24 of the fixing piece 22 is slightly raised outward. A hole 25 is bored in this central part 24, and a washer 26
A pin 27 formed by fitting the hole 25 is inserted into the hole 25.
Then, a spring 29 and a washer 30 are fitted into the pin shaft 28 protruding toward the post 1 side, and the spring 29 and washer 30 are attached to the pin shaft 28 by pressing the pin shaft end 31.
With this configuration, the elastic force of the spring 29 causes the washer 2 to
6 is always in contact with the center portion 24 of the fixed piece 22. As a result, when the net 20 is stretched, the net tension string 18 can be tightened by simply winding the end of the net tension string 18 between the center portion 24 of the fixing piece 22 and the washer 26 about once or twice. It can be hung easily and reliably. In addition, as shown in FIG. 6, by simply squeezing the lever 32 upward, the swinging rod 33 provided on the tensioner main body 23 operates in the direction of arrow A, and the table tennis table 34
The fixture 35 is operated via the interlocking rod 37 so that it is positioned on the underside 36 of the table tennis table 34. after that,
Screw the screw rod 38 to attach the tension tool body 23 to the table tennis table 3.
Fixed at 4.

According to the present invention having the above-described structure, the engaging tool 9 can freely rotate, so even if the net tensioning string 18 is inserted into the groove 19 from any direction, the net 20 can be properly tensioned in the normal direction. can do. Furthermore, by rotating the head 6 of the adjusting screw 4, the net 20 can be easily and quickly adjusted to any desired height.

As described above, the present invention allows the net height to be arbitrarily and easily adjusted, so it is possible to easily cope with variations in height due to manufacturing errors of posts, etc., and to keep the net height constant. can do.

In addition, since the net tension string 18 stretched along the post 1 is engaged with the outer circumferential side surface 8 of the head 6 of the adjustment screw 4, the string 18 will rotate even if vibration or the like occurs after tensioning. Since the adjusting screw 4 acts as a stopper and does not rotate freely, the net height does not change even during the competition. Furthermore, during practice, the height of the net can be adjusted to be higher than during competition, so if the net is adjusted to the normal height during competition, a practice effect can be expected in which the pin ball will not be hit by the net.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of an embodiment of the present invention.
Figure 2 is a sectional view showing the main part, Figure 3 is a perspective view of the main part, Figure 4 is a side view, Figure 5 is an enlarged side view showing the hook, and Figure 6 is a diagram showing the net being stretched. It is a front view showing a state. 1...post, 4...adjustment screw, 9...engaging tool, 18...net tension string, 20...net.

Claims (1)

[Utility Model Registration Claim] A table tennis net tensioning device comprising: a net (20) height adjustment screw (4) having a hole (7) formed in the axial direction and a head (6) with an anti-slip coating on the outer peripheral side (8) that is screwed into the upper part of a post (1); an engaging device (9) for a net tensioning string (18) having a large diameter portion (10) formed smaller than the head (6) of the adjustment screw (4), and a small diameter portion (12) that is loosely fitted into the hole (7) of the adjustment screw (4) so as to be rotatable.