JPH09168619A - Shuttlecock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reinforce a skirt part and to improve durability by tying up binding thread composed of the spun yarn of a polyvinylalcohol resin for at least three times to the shaft part of the feathers of the skirt part, performing fixation by imparting an adhesive material including a nitrocellulose resin to the surface of the binding thread and turning the weight of the entire shuttlecock to a specified range. SOLUTION: The 14-16 pieces of the feathers 6 of a goose for instance are circularly planted on a cork base inside a tip part 1 and the feathers 6 are formed from the shaft part 4 and a feather part 5. Also, the binding thread 7 is tied up for more than three times to the shaft part 4 and adhesive material resin is imparted around it. The binding thread composed of the spun yarn of the polyvinylalcohol resin is tied up at a part from the base of the shaft part 4 of the feathers of the skirt part 8 to the part where the distance from there is 26mm for at least three times, the fixation is performed by imparting the adhesive material including the nitrocellulose resin to the surface of the binding thread and the shaft part, and the entire weight is turned to the range of 4.73-5.50g.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shuttlecock used in badminton and the like. For more information,
The present invention relates to a shuttlecock in which the skirt portion is strengthened and durability is improved.

[0002]

2. Description of the Related Art A skirt portion of a shuttlecock used for badminton uses natural feathers such as waterfowl, landbird and the like from the viewpoint of flight performance after being hit. That is, as shown in FIG. 2, the inside of the tip portion 11 of the shuttlecock 20 has a diameter of 2 mm.
It is formed of a semicircular cork stand of 5 to 28 mm, and the surface is covered with leather. Reference numeral 12 is a resin tape around which an end circumferential portion of leather is wound, and forms a shuttle portion 13 together with the tip portion 11. 14-1 on the cork stand
Six pieces of, for example, goose feathers 16 are planted in a circular shape.
The blade 16 is formed of a shaft portion 14 and a blade portion 15. Further, a tufted thread 17 having two rounds is tied to the shaft portion 14, and an adhesive resin is applied to the periphery thereof. Feather 16
A skirt portion 18 is formed of the pulling thread 17.

This natural blade is easily broken by hitting with a racket, and if it breaks, the flight performance is changed, so that there is a problem that it cannot be used for a long time in a badminton competition. Conventionally, in order to solve this problem, there has been a proposal to cut the skirt of the blades of the skirt to lengthen the shaft and tie a part of the lengthened shaft to a binding thread (Actual No. Sho 59-26).
No. 676). There is also a proposal to apply a thermoplastic polymer such as butyral resin or nylon resin to the tufting yarn and its surroundings (JP-A-63-21078 and JP-A-7-299174).

[0004]

However, the shuttlecock proposed in Japanese Utility Model Laid-Open No. 59-26676 has short blades, so the flight performance after hitting is too good and the badminton. There is a problem that it cannot be used for official competitions. Further, the shuttlecocks proposed in JP-A-63-21078 and JP-A-7-299174 also have insufficient strength, and in particular, the shaft portion is greatly damaged, and it is required to further improve durability. It had been.

In order to solve the above-mentioned conventional problems, the present invention strengthens the skirt portion by improving the durability by using a specific hooking thread and an adhesive and increasing the number of times the hooking thread is connected. The purpose is to provide a shuttlecock.

[0006]

In order to achieve the above object, the shuttlecock of the present invention is a shuttlecock in which a plurality of blades are planted in a circular shape on a table at the tip to form a skirt portion. An adhesive containing a nitrocellulose-based resin on the surface of the knotting yarn, the knotting yarn made of spun yarn of polyvinyl alcohol-based fibers is tied at least three times within a distance of 26 mm from the base of the shaft portion of the skirt blade. Is added and fixed, and the weight of the entire shuttlecock is set in the range of 4.73 to 5.50 g. With the above configuration, the skirt portion can be strengthened and durability can be improved. That is, since the shaft portions of the blades are tied together with the tufting thread for three or more turns, the strength is high and the blades are not easily broken. In particular, it becomes possible to prevent damage to the shaft portion. This is because the tucks of 3 or more rounds are connected to a relatively low position of the blade, and moreover, it is hardened with an adhesive, so the shaft of the blade does not distort even if the cock part is impacted by a hard hit. As a result, there is no damage, and damage to the tip portion of the blade does not easily spread.

Further, since the spun yarn of polyvinyl alcohol fiber is used, it is lightweight and has high strength. In addition, since the spun yarn uses short fibers, it has appropriate bulkiness and hookability, and it is easy to bind the shaft portion of the blade and to fix and integrate it. Further, since an adhesive containing a nitrocellulose resin is used, it is excellent in adhesive integration. That is, an adhesive containing a nitrocellulose-based resin has good affinity with spun yarn of polyvinyl alcohol-based fibers and has good adhesiveness, and an adhesive containing a nitrocellulose-based resin also has affinity with a natural blade. Good and good adhesion. As a result, when an adhesive containing a nitrocellulose resin is used, a shuttlecock having higher strength and durability can be obtained.

[0008] Further, the part where the shaft portion of the blade of the skirt part is 26 mm from the table is tied with the boring thread is designed to match the length of the conventional official shuttlecock and to achieve the flight performance of the conventional shuttlecock. This is because it is the same as the one.

In the above structure, it is preferable that the adhesive is also applied to the shaft portion of the blade of the skirt portion. By doing so, the durability can be further improved. Moreover, in the said structure, the tucks are 11-distance from the stand.
It is preferable that they are tied at substantially equal intervals up to 26 mm. In this way, durability can be improved without changing flight performance.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an embodiment of the present invention.
In FIG. 1, reference numeral 1 denotes a tip portion of a shuttlecock 10, the inside of which is formed by a semicircular cork table having a diameter of 25 to 28 mm, and the surface of which is covered with leather. Reference numeral 2 is a resin tape around which the end circumferential portion of the leather is wound, and forms the shuttle portion 3 together with the tip portion 1. 1 on the cork stand
Four to sixteen, for example, goose feathers 6 are planted in a circular shape. The blade 6 is formed of a shaft portion 4 and a blade portion 5.
Further, the knotting string 7 having three or more turns is tied to the shaft portion 4,
Adhesive resin is applied around it. Kukuri thread is
It is preferable that the distance (L1) from the tabletop of the cork is 11 mm or more and the distance (L2) is 26 mm or less in a range substantially equal to each other. A skirt portion 8 is formed by the blade 6 and the fastening thread 7. The maximum diameter of the vane portion 5 when viewed from above is in the range of 58 to 68 mm, and the length of the skirt portion 8 when viewed in the lateral direction is in the range of 64 mm to 70 mm. In the above description, the distance between the shaft portion 4 of the blade of the skirt portion 8 and the table is at least 3 within a distance of 26 mm.
A knotting yarn made of spun yarn of perimeter polyvinyl alcohol fiber is tied, an adhesive containing a nitrocellulose resin is applied and fixed on the surface of the knotting yarn, and the weight of the entire shuttlecock is 4.73 to 5.50 g. The range was set to. This weight is based on the official ball.

In the above, the yarn for knitting is a spun yarn made of, for example, polyvinyl alcohol short fibers. The average fiber lengths are, for example, 38 mm (short spinning) and 76 mm (long spinning). The spun yarn is S-twisted 20-meter-count single-thread triple-twisted yarn (20s / 1 x 3), and same-count single-thread 4-twisted yarn (20
s / 1 × 4) and the like.

The reinforcing resin has a nitrogen content of 11.
It is preferable to use nitrocellulose having 7 to 12.2% by weight and a number average degree of polymerization of 40 to 450 as a main component, to which the following subcomponents are mixed. That is, rosin ester, maleic acid modified rosin ester, etc. as processing resin, alkyd resin, amino resin, acrylic resin, vinyl resin, etc. as synthetic resin, dibutyl phthalate, dioctyl phthalate, etc. as plasticizer, acetate ester, methyl ethyl ketone as main solvent , Methyl isobutyl ketone, glycol ketone, etc., cosolvents such as ethyl alcohol, butyl alcohol, etc., diluents such as toluene,
Use xylene.

[0013]

The present invention will be described more specifically with reference to the following examples. (Example 1, Comparative Example 1) Sixteen goose feathers were planted in a circular shape on a natural cork base whose semicircular balls were adhered and covered with synthetic leather. The weight of this product was 4.707 g. Next, with a four-ply twisted yarn (20s / 1 × 4) of spun yarn using polyvinyl alcohol short fibers, as shown in FIG. 1, the distances from the cork table were 11 mm and 17.5, respectively.
The three blade shafts at the positions of mm and 24 mm were connected and fixed with a string thread. The weight of this product was 4,877 g. The blade shaft portion and the peripheral portion of the knotting yarn were coated with a nitrocellulose adhesive with a spray and a brush, and dried to form a skirt portion. The nitrocellulose adhesive is composed of 30% by weight of nitrocellulose having a nitrogen content of 11.7 to 12.2% by weight and a number average degree of polymerization of 200, 3% by weight of rosin ester as a processing resin, and alkyd as a synthetic resin. Resin 5% by weight, plasticizer dibutyl phthalate 7% by weight, acetic acid ester 25% as the main solvent
A uniform composition was used in which 5% by weight of ethyl alcohol as a cosolvent and 5% by weight of toluene as a diluent were mixed. Finally, the periphery of the end of the synthetic leather was wrapped with a green resin tape to obtain a product. The applied amount (dry weight) of the resin composition is 0.258 g, and the weight of the resin tape is 0.032.
g. The total weight of the obtained shuttlecock products was 5.167 g.

As a comparative example, a conventional commercial product was used. In this commercially available product, two blade shaft portions at positions of 11 mm and 22 mm from the table are connected and fixed with a bobbin thread and fixed with an adhesive. The knotting yarn was composed of nylon spun yarn, and the adhesive was also nylon resin.

A durability test was conducted using the obtained product of the present invention and a commercially available product. In the durability test, two senior badminton players actually had a match with each other in a match format, and a comparative test was carried out to determine how many sets were damaged together with a commercially available product. As a result, the conventional product could not be used in a few sets because the shaft and blades were damaged. On the other hand, all the products of the present invention were in a state of withstanding use even with a set number of 10 or more. Moreover, there was nothing that could not be used due to damage to the shaft.

The product of the present invention was hardly deformed even when the pulling yarn portion was held in the hand and a force was applied from the lateral direction (diameter direction), but the commercially available product was similarly distorted when the same force was applied. From this, it was confirmed that the product of the present invention has high mechanical strength.

[0017]

As described above, according to the present invention, a tufted yarn made of spun yarn of at least three rounds of polyvinyl alcohol fiber is provided within a distance of 26 mm from the base of the shaft portion of the blade of the skirt portion. The knotting yarn is tied, an adhesive containing a nitrocellulose resin is applied to the surface of the knotting yarn to fix it, and the weight of the entire shuttlecock is 4.73 to 5.5.
By setting it in the range of 0 g, the skirt portion can be strengthened, resistant to impact by hitting, and durability can be improved.
That is, since the shaft portions of the blades are tied together with the tufting thread for three or more turns, the strength is high and the blades are not easily broken. In particular, it becomes possible to prevent damage to the shaft portion. In addition, since the spun yarn of polyvinyl alcohol fiber is used, it is lightweight and has high strength. In addition, since the spun yarn uses short fibers, it has appropriate bulkiness and hookability, and it is easy to bind the shaft portion of the blade and to fix and integrate it. Further, since an adhesive containing a nitrocellulose resin is used, it is excellent in adhesive integration.

Further, according to the preferable structure in which the adhesive is also applied to the shaft portion of the blade of the skirt portion, the durability can be further improved. Further, according to the preferable configuration in which the tufting yarns are tied at substantially equal intervals within a distance of 11 to 26 mm from the platform, the durability can be improved without changing the flight performance.

[Brief description of the drawings]

FIG. 1 is a front view of a shuttlecock according to an embodiment of the present invention.

FIG. 2 is a front view of a conventional shuttlecock.

[Explanation of symbols]

 1,11 Tip part 2,12 Resin tape 3,13 Shuttle part 4,14 Blade blade part 5,15 Blade shaft part 6,16 Blade 7,17 Knotting thread 8,18 Skirt part 10,20 Shuttlecock

Claims (3)

[Claims] 1. In a shuttlecock in which a plurality of blades are planted in a circular shape on a table at the tip to form a skirt portion, the distance between the shaft portion of the blade of the skirt portion and the table is 2
At least 3 rounds of a polyvinyl alcohol fiber spun yarn are tied together within a distance of up to 6 mm, and an adhesive containing a nitrocellulose resin is applied and fixed on the surface of the spool yarn, and the weight of the entire shuttlecock is reduced. 4.7
A shuttlecock characterized by having a range of 3 to 5.50 g. 2. The shuttlecock according to claim 1, wherein the adhesive is also applied to the shaft portion of the blade of the skirt portion. 3. The hooking thread is 11 to 26 m away from the table.
The shuttlecock according to claim 1, wherein the shuttlecocks are tied at substantially equal intervals up to m.