JP2008279179A - Shuttlecock of badminton - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shuttlecock which is made of an artificial material, sticky despite a moderate flexibility, and also durable. <P>SOLUTION: In the shuttlecock of badminton which consists of many independent feathers and a head for a blow to which the many feathers are fixed, a feather valve composing the feather is made of a thermoplastic long-fibre nonwoven fabric and the end face is heat fused in the outer edge of the feather valve. Moreover, in the outer edge of the feather, the end face is heat fused by heat fusing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a shuttlecock used for badminton.

  Badminton is a well-known sport, from play to competition. It is common to use goose feathers for shuttlecocks of badminton for competition, because there are few individual differences and relatively uniform because of the strong blade axis and livestock. It is said that quality products were available. However, although it is said that a relatively uniform quality is available, there is some variation in quality because it is natural, and it is very expensive because only a limited number of blades can be used. Can be mentioned.

  Under the circumstances as described above, a shuttlecock using an artificial material that has stable quality and can be obtained at low cost has been proposed.

  What is widely known as a shuttlecock made of an artificial material is one in which the entire blade is integrally formed in an annular shape and is often used for play. However, this integrally formed shuttlecock has a so-called skirt that is integrally connected. Like a shuttlecock consisting of a large number of independent blades, each blade can be freely and freely axised at the time of impact. Because it cannot be deformed so that it squeezes to the side and quickly restores again, it is completely unsuitable for competitions, where the change in air resistance received by the blades is an important factor.

  On the other hand, as a shuttlecock made of an artificial material that can be used for competition, for example, Patent Document 1 and Patent Document 2 are proposed.

  Patent Document 1 proposes a non-woven fabric or woven fabric made of a synthetic fiber, which is formed by forming an independent blade branch, and further injecting a plastic alloy so as to increase the strength of the blade stem. . In Patent Document 2, as a component of a blade valve, a thin plate of fiber-dispersed resin Specifically, an epoxy resin, an unsaturated polyester resin, a thin woven fabric or nonwoven fabric with a thin basis weight made of polyester fiber, polyamide fiber, vinylon fiber, etc. A product obtained by impregnating an uncured liquid material of a thermosetting resin such as diallyl phthalate resin and performing curing molding has been proposed.

In badminton, since the striking is repeated violently, the shuttlecock using the blade valve obtained by punching the cloth made of synthetic fiber as described in Patent Document 1 has a problem that fraying of the fiber occurs from the end. is there. On the other hand, Patent Document 2 uses a material that is formed by impregnating a cloth constituting a blade valve with a thermosetting resin, and this is hardened like a resin plate. Does not have the flexibility of
JP 57-37464 A JP 59-69086

  The present invention provides a shuttlecock made of an artificial material, which is moderately flexible but firm, and also has durability.

  The present invention is a shuttlecock comprising a large number of independent blades and a head for striking on which a large number of blades are implanted and fixed, and a blade valve constituting the blades is made of a thermoplastic long-fiber nonwoven fabric. The gist of the shuttlecock of badminton is characterized in that the end face is heat-sealed at the outer edge of the valve.

  In FIG. 1, the schematic top view of the blade | wing which comprises a shuttlecock is shown. As shown in FIG. 1, the blade | wing (1) which comprises a shuttlecock is comprised by the blade valve (2), and has the blade | wing axis | shaft (3) located in the center part of a blade valve (2). In the present invention, the end face is heat-sealed at the outer edge (4) of the blade valve.

  FIG. 2 shows a schematic perspective view of the shuttlecock. In the shuttlecock (5), the plurality of blades (1) have the root portion of the blade shaft (3) located at the center portion of the blade valve planted in the head for striking (6), and the fastening yarn (7) The blade shafts (3) are fastened and fixed.

  In this invention, the blade valve which comprises a blade | wing is comprised with a thermoplastic long-fiber nonwoven fabric. Since the nonwoven fabric is composed of a thermoplastic synthetic polymer, the end face at the outer edge of the blade valve can be heat-sealed. Moreover, when a nonwoven fabric is comprised not with a short fiber but with a long fiber, it is hard to produce a fluff on a blade | wing surface by use, and durability becomes favorable.

  Examples of the thermoplastic synthetic polymer constituting the nonwoven fabric include polyester, polyamide, and polyolefin. Polyester is preferably used from the viewpoint of versatility.

  Long-fiber non-woven fabric is a product of a large number of long fibers deposited, but a non-woven fabric is a product obtained by thermally fusing together a large number of accumulated long fibers by heat calendering or heat embossing. Can be preferably used. More preferably, a long fiber nonwoven fabric in which long fibers are integrated by partially having a thermocompression bonding part by hot embossing is preferably used.

Basis weight of the nonwoven fabric, it is ^{30g / m 2 ~70g / m 2} . By setting the basis weight to 30 g / m ² or more, it has a stiffness suitable for use, and by setting it to 70 g / m ² or less, the same lightness as that of a natural goose feather can be maintained. The shuttlecock has the property of being easy to fly when the air resistance decreases, such as in hot seasons and highlands, and the basis weight may be appropriately selected according to the use environment.

  Moreover, you may provide a small amount of binder resin to a nonwoven fabric. By applying the binder resin, the blade valve can be given firmness. The material of the binder resin applied to the nonwoven fabric is not particularly limited, and a general-purpose acrylic binder resin or the like may be used. Moreover, about 5-20 mass parts is good with respect to 100 mass parts of nonwoven fabrics for the quantity (solid content quantity) of resin to provide. If the amount is less than 5 parts by mass, the effect of imparting the binder resin is difficult to be achieved. On the other hand, if the amount exceeds 20 parts by mass, the blade valve is cured and the flexibility is not maintained, and the blades are squeezed into the head toward the axis when hit Thus, it becomes difficult to perform an operation of deforming and quickly restoring again.

  The end face is heat-sealed at the outer edge of the blade valve of the present invention. Since the fibers existing on the end face are thermally fused, the fibers are not frayed in use, and the durability of the shuttlecock is improved. The heat fusion of the end faces can be formed by heat fusing into the shape of a predetermined blade valve using an ultrasonic fusing machine or a heat fusing machine when producing a vane valve from the nonwoven fabric raw fabric.

  A blade shaft is provided at the center of the blade valve. The blade shaft is formed of a known thermoplastic resin or thermosetting resin. As a method of providing the blade shaft on the blade valve, a blade shaft having a predetermined shape may be formed by injection molding or the like. The blade shaft obtained by injection molding may be bonded and fixed to the central portion of the blade valve with an adhesive. Alternatively, the blade valve and the blade shaft may be fixed by thermal fusion by directly injection-molding the blade shaft at a predetermined location in the central portion of the blade valve.

  The obtained many blades were each planted with a root portion of the blade shaft in a drilling hole provided in advance in the head for hitting, and the planted portion was fixed with an adhesive, and each blade was fixed with a fastening thread. A shuttlecock can be obtained by fastening the shafts together. A method for obtaining a shuttlecock using a large number of blades may be performed in the same manner as a method for obtaining a shuttlecock using natural waterfowl blades conventionally performed.

  In the shuttlecock of the present invention, the blade valve is made of a thermoplastic non-woven fabric, and the end face is heat-sealed at the outer edge of the blade valve. Generation of fluff and frayed yarn can be prevented, and a shuttlecock having durability while being moderately flexible and elastic can be obtained.

  Hereinafter, the present invention will be described specifically by way of examples.

First, the thermoplastic long-fiber nonwoven fabric which comprises a blade valve was prepared. This long fiber non-woven fabric is a product in which a large number of long fibers made of polyethylene terephthalate (melting point 256 ° C.) are deposited, and a thermocompression bonding part is partially formed by hot embossing (roll surface temperature 210 ° C.). Are integrated, the thermocompression bonding rate is 36%, and the area of each thermocompression bonding part is 0.4 mm ² . Moreover, the acrylic fiber binder is provided to this long fiber nonwoven fabric (14 mass parts by solid content). The basis weight of the long fiber nonwoven fabric (with binder) is 50 g / m ² .

  This long fiber nonwoven fabric was punched out by thermal fusing into a predetermined blade valve shape with an ultrasonic fusing device. The end face was heat-sealed at the outer edge of the obtained blade valve.

  On the other hand, a polyethylene terephthalate similar to the polyethylene terephthalate constituting the blade valve was injection-molded to prepare a blade shaft having a hollow structure inside.

  A blade shaft was disposed at the center of the blade valve and fixed with an adhesive to obtain a blade. The shuttlecock of the present invention was obtained by implanting the obtained blades on the head for impact and fastening each blade with a fastening thread.

It is a schematic plan view of the blade | wing which comprises a shuttlecock. It is a schematic perspective view of a shuttlecock.

Explanation of symbols

1: blade 2: blade valve 3: blade shaft 4: outer edge of blade valve 5: shuttlecock 6: head for impact 7: fastening thread

Claims (2)

A shuttlecock comprising a large number of independent blades and an impact head on which the plurality of blades are implanted and fixed, the blade valve constituting the blade is made of a thermoplastic non-woven fabric, and at the outer edge of the blade valve A badminton shuttlecock characterized in that the end faces are heat-sealed. 2. The shuttlecock for badminton according to claim 1, wherein the outer edges of the blades are thermally fused so that the end faces are thermally fused.