JP3892830B2 - Competition net - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a competition net suitable as a net for soft volleyball competition or the like.
[0002]
[Prior art]
In soft volleyball or mini soft volleyball competition, a court having the same size as the badminton court is used, and the net is also equivalent to the badminton competition net. The net is supported by being stretched to a predetermined height (2 m) between two struts placed across the coat. As a rope for supporting the net, a nylon rope is usually used, and when attaching to the support, both ends of the rope are hooked to the hook of the support. For example, Japanese Utility Model Publication No. 61-111468 discloses a rope material. In this publication, metal wire is usually used as the wire rope, and in this device, a special wire rope (rope made of super-stretched polyoxymethylene) is used, so that the tensile strength and durability are Is stated to be improved. Note that metal wire ropes are often used in volleyball competition nets.
[0003]
[Problems to be solved by the invention]
In the conventional net using a wire rope or nylon rope, it is necessary to hang the end of the rope on the strut or tie it to the strut when it is stretched between struts. There is a problem that it is difficult to stretch without loosening unless it is an adult's strong power.
[0004]
Also, during the competition, if the player's hand is applied to the net stretched without loosening and a strong tensile force is applied to the rope with the net stretched, this force is directly applied to the column, especially the movable type that is only placed on the floor In the case of a support, this may fall.
[0005]
This invention is made | formed in view of this situation, and provides the net | network for a competition which can perform a net construction work easily.
[0006]
[Means for Solving the Problems]
The present invention (Claim 1) is a game net having a net body having a rope insertion hole on the upper side, and a rope inserted through the insertion hole to support the net body between two struts. will have joint been formed on both ends of the rope, while該継hand is connected to a ring formed on the upper end of the support column consists of stretchable portion and a non-stretchable portion which the rope is elastically stretchable, said elastic portion is the An opening / closing part that opens the insertion hole is formed in the insertion hole in which the expansion / contraction part is positioned, while being positioned at an appropriate position of the insertion hole . In this configuration, the net is stretched by passing the rope through the insertion hole on the upper side and connecting the joints at both ends to the ring at the upper end of the column.
[0008]
In this invention (Claim 2 ), the insertion hole in which the said expansion-contraction part is located is provided with the 1st prevention means which blocks | prevents the movement from the said opening-closing part of the said expansion-contraction part.
[0009]
According to the present invention (Claim 3 ), the both ends of the rope are provided with second blocking means for blocking the end of the rope from entering the insertion hole.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1, reference numeral 1 denotes a soft volleyball net, which includes a net body 2 and a rope 3. 4 is an insertion hole formed in the upper side 5 of the net body 2, and is configured by folding the upper end of a white cloth and stitching the lower end. Reference numerals 6 and 7 denote a lower side and a side side made of the same white cloth. Reference numeral 8 denotes a mesh portion stretched over a rectangular region surrounded by the upper and lower sides 5 and 6 and the side 7. The rope 3 includes a non-stretchable portion 9 and a stretchable portion 10, and a nylon rope can be used as the non-stretchable portion 9 and a rubber band or a coil spring can be used as the stretchable portion 10. In the figure, a case where a ring-shaped rubber band is used as the stretchable portion 10 is shown. The rubber band can be a ring or a string. As the non-stretchable part 9, a string made of metal wire rope, natural fiber or chemical fiber can be used in addition to the rope.
[0011]
The stretchable portion 10 is positioned near one end side (left side in the illustrated example) of the net body 2. That is, the rope 3 is connected in the insertion hole 4 from the left in the drawing in the order of the short non-stretchable part 9, the stretchable part 10, and the long non-stretchable part 9. The stretchable portion 10 and the long non-stretchable portion 9 on the right side have a structure that can be tied or unwound by hand, and a knot 11 is formed. The other parts are firmly connected by a metal tube. The reason why a part of the structure is unwound by hand is that the length of the entire rope 3 can be changed according to the width of the net body 2. 12 and 12 are metal universal joints attached to both ends of the rope 3.
[0012]
Reference numeral 13 denotes an opening / closing portion formed in the insertion hole 4 portion of the net body 2 where the expansion / contraction portion 10 is located. The lower end of the upper side 5 is not stitched to this portion, and the surface fastener 14 is attached to the inner surface. This part can therefore be opened. FIG. 1 shows the open state. Reference numeral 15 denotes first blocking means formed at the right end of the opening / closing portion 13 in the drawing, and the upper side 5 is sewn into a rectangular shape to narrow the insertion hole 4. The knot 11 between the stretchable part 10 and the non-stretchable part 9 cannot pass through the narrow part of the insertion hole 4.
[0013]
The first blocking means 15 is provided and the opening / closing part 13 is provided in the insertion hole 4 where the expansion / contraction part 10 is located, so that when the expansion / contraction part 10 is cut, it can be easily replaced or the knot 11 is tied. This is to fix it. That is, when the expansion / contraction part 10 is cut, the knot 11 is stopped by the first blocking means 15 and does not enter the insertion hole 4 (right side in the drawing) any more. Can be easily taken out.
[0014]
Reference numerals 16 and 16 denote second blocking means for blocking the joints 12 and 12 from entering the insertion hole 4, which are formed of a short string (about 5 cm in length). It is connected to openings 17 and 17 formed at the upper end of the upper side 5 by eyelets. 18 is a connection member for fixing the net body 2 to the support, and is composed of a rubber band 19 and a sheet-like fastener portion 20 formed at the tip and side of the rubber band 19. They are provided at approximately equal intervals. The fastener portion 20 is closed to the net side 7 by winding a support column which will be described later.
[0015]
Here, as an example of dimensions, the width of the net body 2 is 600 cm, the height is 80 cm, and the stretchable portion 10 is connected to the inside of the rope 3 by 20 cm from one end (the left end in the illustrated example) (that is, The length of the non-stretchable part is 20 cm). The length of the stretchable portion 10 is 40 cm (when not stretched), the length of the longer non-stretchable portion 9 on the right side in the drawing is 525 cm, and the entire length of the rope is 585 cm. This length is shorter than the width of the net body 2. That is, the stretchable portion 10 is set to be equal to the width of the net body 2 in a state where the stretchable portion 10 is stretched and stretched and an appropriate tensile force is applied. The position of the first blocking means 15 can be lm from the end of the net 1, and the width of the insertion hole 4 in this portion can be 1 cm. The width of the upper side 5, that is, the width of the insertion hole is 7 cm, and the widths of the lower side 6 and the side side 7 are also 7 cm.
[0016]
2 and 3 show a case where the net 1 is stretched on the support columns 21 and 21 having a movable structure. The support column 21 includes an upper support column 22 and a lower support column 23 made of a metal pipe. The upper support column 22 is fitted into the lower support column 23, and the height of the upper support column 22 is adjusted via a height adjustment pin 24. The Usually, in the soft volleyball game, the height of the upper side 5 of the net 1 is set to a different height such as 2 m for general adults, 2 m, 1.8 m, 1.5 m, 1.2 m for elementary school students. Reference numeral 25 denotes a metal ring formed at the upper end of the upper column 22, to which the joints 12 at both ends of the rope 3 are connected.
[0017]
26 is a base horizontally fixed to the lower support 23 near the lower end of the lower support 23, 27 is a weight placed on the base 26, and 28 and 29 are below the base 26. An attached caster 30 is a rubber stopper attached to the lower end of the column. The rubber stopper 30 side has two casters 28 and the outer caster 29 has one, and the base 26 is in a stable state. The center of gravity G of the weight 27 is above the caster 28, and when no load is applied to the column 21, the two casters 28 and 29 can both be grounded to the floor surface 31 by lightly pushing with a hand. At this time, the rubber stopper 30 of the support column 21 is separated from the floor surface 31. Therefore, the support column 21 can easily move on the floor surface 31 by rolling of the casters 28 and 29.
[0018]
On the other hand, when the net 1 is stretched on the support column 21 and the pulling force is applied to the support column 21 on the right side (in the drawing) due to its weight and tensile force, the base 26 and the weight 27 are centered on the caster 28. The rubber stopper 30 of the column 21 hits the floor 31 and the outer caster 29 floats in the air. Thus, the support column 21 is fixed to the floor surface 31. A protective cover 32 covers the base 26 and the weight 27.
[0019]
When the net 1 is stretched on the support column 21 using the support column 21, both ends of the rope 3 passed through the insertion hole 4 on the upper side 5 with the upper support column 22 lowered and the two support columns 21 approached. The joint 12 is coupled to the ring 25 at the upper end of each upper column 22, and the upper connection member 18 is wound around the upper column 22. Next, the upper support column 22 is extended upward and fixed with a height adjustment pin 24 as a predetermined height. Another connecting member 18 is wound around the upper column 22. The space between the two struts 21 and 21 is expanded and stopped at a predetermined position on the court side. At this time, the rope 3 is pulled, the stretchable portion 10 is elastically extended, the rubber band portion 19 of the connecting member 18 is elastically extended, and the net 1 is pinched between the columns 21 and 21. Such work can be easily performed even by short elementary school children.
[0020]
In the net stretched state, tension is generated in the stretchable part 10 so that the rope 3 does not hang down. In fact, when the stretchable part 10 extends from 40 cm to 50-60 cm, sufficient tension is obtained. When the elasticity of the stretchable part 10 was set and a rubber band having the above dimensions was used, the spring constant K was about 30 kg / m. If the spring constant of the expansion / contraction part 10 is set in the range of about 25 to 50 kg / m, when the net body 2 is stretched against the weight of the net body 2 and the body of the player hits, an appropriate cushioning action Can be obtained. Moreover, since the tension | tensile_strength to the inner direction acts on the support | pillar 21 with the weight of the net | network 1 itself, and the said elastic force, the rubber stop bar 30 of the support | pillar 21 hits the floor surface 31, and the support | pillar 21 is fixed.
[0021]
In such a structure, even if the player's hand hits the upper side 5 of the net, the rope 3 stretches elastically and absorbs and relaxes this impact, so that the pain felt by the player is reduced. At the same time, since this impact is absorbed by the rope 3, the impact applied to the support column 21 is reduced, and the possibility that the position of the support column 21 is shifted or the support column 21 falls is small.
[0022]
By the connecting member 18, the side 7 and the lower side 6 of the net body 2 are also tensioned. In particular, it is important that the net lower side 6 is always in a tensioned state. In volleyball games, poles that bounce off the net 1 must be handled well, and net play is an important technique for players. If the net lower side 6 is loose, the ball that hits the mesh portion 8 will not bounce off and will fall to the floor 31 as it is, so that advanced net play cannot be demonstrated, and the game will be tempered. Therefore, not only the upper side 5 but also the lower side 6 of the net 1 must be kept taut.
[0023]
In other words, the ball that hits the stitch portion 8 must be bounced back to the court side, and for that purpose, the lower side 6 must be tight. The player predicts the speed, direction, and the like of the ball that rebounds to the court on the lower side 6 and processes the ball without dropping it on the floor.
[0024]
FIGS. 4-6 shows the case where the net | network 1 is stretched by the support | pillar 32 of a different structure, ie, the support | pillar 32 of the structure embedded in the floor surface 31. FIG. The support column 32 includes an upper support column 33 and a lower support column 34 as described above. The upper support column 33 is fitted to the lower support column 34, and the height of the upper support column 33 is adjusted via the height adjustment pin 24. A horizontal hole 35 is formed at the upper end of the upper column 33, and a column rope 36 is passed through the hole 35. Reference numeral 37 denotes a “<”-shaped locking portion formed on the lower support column 34, which hooks and fixes the lower end of the support rope 36.
[0025]
The support column 32 is erected by embedding or fitting into both sides of the coat. The strut rope 36 has a ring-shaped portion 38 on the upper end side, and the joint 12 of the rope 3 is connected to the ring-shaped portion 38. The lower end of the support rope 36 is wound around the locking portion 37 and locked. The size of the hole 35 is formed such that the ring-shaped portion 38 at the upper end of the support rope 36 does not pass through.
[0026]
In the net 1 configured as described above, the mounting method will be described. With the upper and lower columns 32 standing on the floor 31 and the upper column 33 lowered, the column rope 36 is passed through the hole 35, and the lower end thereof is the locking portion. Temporarily fasten to 37. Next, the joint 12 of the rope 3 of the net 1 is connected to the ring-shaped portion 38 of the support rope 36, and the net body 2 is stretched between the two supports 32 and 32. Next, the upper columns 33, 33 of both columns 32, 32 are raised and fixed at a predetermined height. At this time, the connecting member 18 of the net body 2 is turned to the upper support 33 to fix the net side 7 to the support 32. The strut rope 36 of both struts 32, 32 is pulled, the stretchable portion 10 is extended to a position where the joint 12 of the rope 3 is in contact with the upper strut 33, and the strut rope 36 is hooked on the locking portion 37 and fixed. In addition, a protection cover can be wound around the locking portion 37 together with the support 33 so that a player or the like does not directly hit the locking portion 37. Thus, the net 1 is stretched between the columns 32 and 32. Even in such a method, the child can perform the work as in the above-described embodiment.
[0027]
The position and number of the elastic parts 10 in the rope 3 can be changed. FIG. 7 shows a case where the stretchable parts 10 are arranged in the vicinity of the left and right ends of the rope 3. In this structure, when the player hits the net upper side 5 (FIG. 1), the expansion / contraction portions 10 of the left and right portions of the rope 3 extend evenly, so that the expansion / contraction of the rope 3 is more naturally balanced. be able to. In this case, for example, a rubber band constituting the stretchable part 10 can be shorter than the rubber band in the above-described embodiment. FIG. 8 shows a case where the stretchable part 10 is arranged at the center of the rope 3. In any of the above structures, the opening / closing part 13 and the first blocking means 15 for blocking the movement of the expansion / contraction part 10 are provided in the portion of the insertion hole 4 (FIG. 1) where the expansion / contraction part 10 is disposed.
[0028]
In FIG. 9, the rope 3 is composed of only the stretchable part 10, for example, only a rubber band. Even in such a configuration, an elastic tensile force can be applied to the net 1. Furthermore, it is also possible to provide a structure in which stretchable portions such as rubber bands are provided at both ends of the non-stretchable rope, the non-stretchable portion is passed through the insertion hole of the net, and the stretchable portion is pulled and locked to the locking portion of the support.
[0029]
FIG. 10 shows another embodiment, in which stretchable portions 39 and 40 are formed at the center of the upper side 5 and the lower side 6 of the net body 2. The upper side 5, the lower side 6 part and the side 7 other than the stretchable parts 39, 40 are made of a non-stretchable cloth. A connecting member 18 made of a rubber band and a planar fastener is attached to the net side 7 as in the above-described embodiment. The stretchable portions 39 and 40 can be made of rubber, and the stretchable portion 39 on the upper side 5 is formed with an insertion hole 4, as with the left and right upper sides 5. The rope 3 (FIG. 1) is passed through the insertion hole 4 in the net body 2. In addition to the above, the stretchable part 7 can be formed only on the upper side 5 or only on the lower side 6, and the position thereof can also be set arbitrarily.
[0030]
Usually, in this type of net 1, particularly when used by a child, the net part 8 of the net may be pulled by the hand during the competition or practice, or may be leaned against the net 1. In the case of the conventional net, this force is directly applied to the support column, and particularly when the movable support column 21 (FIG. 2) is used, the support column 21 may be displaced or the support column 21 may fall down. The elastic portions 39 and 40 of the elastic members extend elastically to absorb and relax them, thereby reducing the load applied to the column 21.
[0031]
In the above-described embodiment, the net for soft volleyball and mini soft volleyball has been described as the net 1, but the structure of the net can be used for nets for other competitions such as badminton, volleyball competition, and tennis competition.
[0032]
【The invention's effect】
[0033]
According to the present invention (Claim 1), when the net is stretched, it is only necessary to connect the joints at both ends of the rope passed through the insertion hole on the upper side to the ring at the upper end of each column, so that the work can be easily performed. it can.
[0034]
Further, according to the present invention (Claim 1 ), since the rope comprises an elastic part that elastically expands and contracts and a non-elastic part, when the net is stretched between the columns, the elastic part elastically expands and the rope A tensile force is applied to the net, so that the net can always be kept taut. In addition, when a player's hand hits the net, the impact is absorbed and relaxed by the stretchable part, and the pain given to the player is reduced. Further, even if force is applied to the net due to the collision or the ball hitting, the force applied to the column is reduced, so that the occurrence of an accident in which the column is displaced or falls is suppressed. In addition, when the expansion / contraction part breaks or when adjusting the knot between the expansion / contraction part and the non-expandable member, it is easy to open the opening / closing part and pull it out from the insertion part, making it easy to replace and reconnect the expansion / contraction part It becomes.
[0035]
Further, according to the present invention (Claim 2 ), when the stretchable portion is cut, it stops at the first blocking means and does not move to the inside of the insertion hole that cannot be opened. It can be pulled out.
[0036]
Furthermore, according to the present invention (Claim 3 ), the rope is provided with the second blocking means for blocking the end of the rope from entering the insertion hole at both ends of the rope. However, the end of the rope enters the insertion hole and cannot be taken out, so that both ends of the rope can be connected to the strut or the strut rope at any time.
[Brief description of the drawings]
FIG. 1 is a front view showing a competition net according to an embodiment of the present invention.
FIG. 2 is a front view showing a state in which a net is stretched on a support post.
FIG. 3 is an enlarged front view showing an upper end portion of a column in FIG. 2;
FIG. 4 is a front view showing a state in which a net is stretched on a column having another structure.
5 is an enlarged front view showing the upper end portion of the column in FIG. 4; FIG.
6 is a front view showing a locking portion of the support column in FIG. 4; FIG.
FIG. 7 is a front view showing a modified example of a rope.
FIG. 8 is a front view showing a modified example of a rope.
FIG. 9 is a front view showing a modified example of a rope.
FIG. 10 is a front view showing another embodiment of a net.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Net 2 Net body 3 Rope 4 Insertion hole 5 Upper side 6 Lower side 7 Side side 8 Net part 9 Non-expandable part 10, 39, 40 Elastic part 11 Knot 12 Joint 13 Opening / closing part 14, 20 Fastener part 15 First blocking means 16 First 2 Blocking means 17 Opening 18 Connection member 19 Rubber band 21, 32 Post 22, 33 Upper support 23, 34 Lower support 24 Height adjustment pin 25 Ring 26 Base 27 Weight 28, 29 Caster 30 Rubber stopper 36 Support rope 37 Stop

Claims (3)

In a competition net having a net body having a rope insertion hole on the upper side and a rope inserted through the insertion hole and supporting the net body between two struts, joints are formed at both ends of the rope. The joint is connected to a ring formed at the upper end of the support column, while the rope is composed of an elastic part and a non-elastic part that elastically expands and contracts, and the elastic part is positioned at the proper position of the insertion hole, A competition net in which an opening / closing part that opens the insertion hole is formed in the insertion hole in which the expansion / contraction part is located . The competition net according to claim 1, wherein first insertion means for preventing movement of the expansion / contraction part from the opening / closing part is provided in the insertion hole in which the expansion / contraction part is located. The competition net according to claim 1 or 2 , wherein a second blocking means for blocking the end of the rope from entering the insertion hole is provided at both ends of the rope.