JPS5915658Y2 - Volleyball antenna - Google Patents

Description

[Detailed explanation of the invention] This invention is used in volleyball competitions by having a system on both sides of the net that stands upright higher than the net so that the umpire can detect fouls such as players over the net, and poles that cross the net or hit the net. This relates to improvements to the volleyball antenna, which is officially used as an indicator to determine whether the antenna is within the valid range according to the rules.

In recent years, with the international spread of volleyball, volleyball antennas have been adopted to help ensure fair refereeing, but conventional products consist of a single long frame and two net tensioning devices, upper and lower. , the fastening device was configured to be hooked onto the upper wire and lower rope of the net and tightened with screws, etc.
When tightening the upper part of the net, there is the inconvenience of needing a step stool, stepladder, etc. Also, the two upper and lower fasteners require time and effort to adjust to fit the width of the stretched net. This has the disadvantage that the impact stress applied to the net during competitions acts on the fasteners, resulting in premature damage to the fasteners and the net.

Therefore, the purpose of this invention is to provide a volleyball antenna that does not require a step stool when tightening the net, can be easily and firmly tightened, and of course can be easily removed. will be explained with reference to the drawings.

Insert the upper fixing bolt 3 having the threaded part 1 and the head 2 into the upper part of the pole body A, fit the upper hook 5 with the convex parts 4, 4 into the bolt, and connect the upper fixing bolt 3 and the pole below. Insert pin 9 through body A,
At the same time as fixing the pole body A and the upper fixing bolt 3,
The upper hook 5 is made rotatable relative to the upper fixing bolt 3.

A cam 7 with a diamond-shaped side and a U-shaped plane is placed over the threaded portion 1 of the upper fixing bolt 3, and the pin 10 is inserted through the cam 7 and the lifting nut 8 and caulked, so that the cam 7 is attached to the lifting nut. 8 so that it can rotate freely.

In this configuration, a spring 11 is installed so that the cam 7 springs upward relative to the lifting nut 8.

Screw the lifting nut 8 with the cam 7 and spring 11 assembled into the threaded portion 1 of the upper fixing bolt 3.

A stopper 12 is fixed to the ball body A with a pin 13 so that the lifting nut 8 does not come off the upper fixing bolt 3.

A long hole 14 is provided in the lower part of the pole body A, into which a holder 16 integrated with a bolt 15 having a threaded portion at one end is inserted, and the holder is fixed to the pole body A through the long hole 14 with a pin 17. Leave the end in the elongated hole 14 and attach it to the holder 1.
6 does not rotate relative to the pole body A, but holder 1
6 to be able to slide up and down within the elongated hole.

Next, attach the lower pressure nut 1 to the bolt 15 of the holder 16.
A lower hook 19 into which a screw 8 is screwed is screwed together so that the hook can rotate freely with respect to the holder 16, and a stopper 20 is pinned to the lower part of the hook 19 to serve as a volleyball antenna.

In this invention, as described above, the upper fixing bolt 3 is inserted into the upper part of the pole main body A, and the upper hook 5 with the protrusion 4° 4 is rotatably attached to the upper fixing bolt 3. The cam 7 is placed on the threaded part 1 of the lifting nut 8 and is caulked with a pin 10 so that the cam 7 can freely rotate with respect to the lifting nut 8. Moreover, a spring 11 is attached so that the cam 7 is attached to the lifting nut 8. It is constructed so that it can rise upwards against the ground.

Further, a holder 16 integrated with a bolt 15 having a threaded portion at one end provided with an elongated hole 14 is inserted into the lower part of the pole main body A, and is fixed with a pin 17. Since the holder 16 is left in the slot, the holder 16 can be slid up and down within the elongated hole.

A lower hook 19 into which a lower pressure nut 18 is screwed is screwed onto the bolt 15 of the holder 16, so that the hook is rotatable relative to the holder 16.

Therefore, when the holder 16 is rotated, the pole body A
rotates, and the upper cam 7 and upper pressure nut 8 are vertically displaced, and at the same time, the lower elevating nut 18 is also vertically displaced, and the lower hook 19 is tightened and loosened.

Then, rotate the holder 16 to connect the cam 7 and the lower hook 1.
9, the wire rope B at the upper end of the net is hooked on the upper hook 5, and the rope C at the lower end of the net is passed between the lower hook 19 and the lower pressure nut 18.

Then, when the holder 16 is turned in the loosening direction, the pole main body A rotates and the lifting nut 8 moves in the direction of the upper fixing bolt 3, and the cam 7 also moves in the same direction, and the cam 7 is moved by the spring 11 to the upper hook. The cam 7 comes into contact with the protrusions 4, 4 of the net and slides on the protrusions 4.4, and becomes the horizontal state shown in FIG. Tighten and secure.

Further, although there may be slight differences in the width of the net used, there is an advantage that in this case, the net width can be automatically adjusted within the range of the elongated hole 14 of the holder 16.

Thus, when a volleyball net is stretched, it will be more than 2 meters high to the top, but if this invention is used, the top of the net can be fixed by turning the holder 16 provided at the bottom of the pole body A. This eliminates the inconvenience of using a step stool or stepladder, and at the same time, it is extremely convenient to remove the net by simply turning the holder 16. Since A moves up and down, it has the effect of alleviating the impact stress that the net receives during the competition.
The rate of damage to the antenna body as well as the net is reduced.

Furthermore, according to this invention, the wire ropes B and C of the net are fastened by clamping, so they are stronger compared to conventional fastening using screws, and there is no possibility that the fastenings will loosen or come off during the competition. It will go away.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an exploded state, Fig. 2 is a side view of a state in which the net is fastened, Fig. 3 is a side view of the state separated from the net, and Fig. 4 is a side view of an embodiment of this invention. The figure is a side view showing the moving state of the cam. A: Pole body, 1: Screw part, 2
...Head, 3...Top fixing bolt,
4, 4... Convex part, 5... Upper hook,
7...Cam, 8...Lifting nut, 9.
...Pin, 10...Pin, 11...
... Spring, 12 ... Stopper, 13.
...Pin, 14...Elongated hole, 15...
...Bolt, 16...Holder, 17...
...Pin, 18...Lower pressure nut, 19...
... Lower hook, 20 ... Stopper, B
・・・・・・Net wire rope, C・・・・・・
Same rope.

Claims (1)

[Scope of utility model registration request] Insert the upper fixing bolt 3 having a threaded part and a head part into the upper part of the pole body A, fit the upper hook 5 with convex parts 4, 4 into the bolt, and connect the upper fixing bolt 3 and the pole body below. A is fixed with a pin to make the upper hook 5 rotatable with respect to the upper fixing bolt 3, and a cam 7 having a diamond-shaped side and a U-shaped plane is attached to the lifting nut 8 with a pin to the threaded portion 1 of the upper fixing bolt 3. Caulk the cam 7 up and down with the nut 8.
The cam 7 is configured to be able to rotate freely against the upper fixing bolt 3, and a spring 11 is attached so that the cam 7 is configured to spring up against the lifting nut 8 and screwed together, so that the lifting nut 8 does not come off from the upper fixing bolt 3. The stopper 12 is fixed to the pole main body A with a pin, and a long hole 14 is provided in the lower part of the pole main body A, and a holder 16 integrated with a bolt 15 having a threaded portion at one end is inserted, and the holder 16 is fixed with a pin 17. Fix it to the pole body A through the elongated hole 14, leaving the end of the pin in the elongated hole and attaching it to the holder 1.
A lower hook 19 with a lower pressurizing nut 18 screwed into the bolt 15 of 6 is screwed together, the hook is rotatable with respect to the holder 16, and a stopper 20 is pinned to the lower part of the hook 19 to provide a volleyball antenna.