JP2011218093A - Shuttlecock for badminton, feather for shuttlecock, and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feather for badminton shuttlecock, which has appropriate rigidity such that a shape can be retained even by a single feather portion, and eliminates the need of a separate retaining member for retaining an annular arrangement of feather portions.SOLUTION: The feather for shuttlecock 10 includes a feather portion 12 on one end side of a shaft body 13. The shaft body 13 includes a trunk portion 13b and branch portions 13a extended from the trunk portion 13b. The branch portions 13a are extended substantially along both sides of the outer periphery of the feather portion 12, and fixed to the feather portion 12.

Description

  The present invention relates to a badminton shuttlecock, a shuttlecock blade, and a method of manufacturing the same.

  Conventionally, as a shuttlecock for badminton, a natural shuttlecock using waterfowl feathers for its blades and an artificial shuttlecock using blades artificially manufactured from nylon resin or the like are known.

  FIG. 5 (a) shows an example of an artificially produced badminton shuttlecock. The illustrated badminton shuttlecock 50 includes a hemispherical base body 52 made of cork or the like, and a plurality of (for example, 16) artificial feathers 53 for shuttlecock connected to the flat surface 52a of the base body 52. Is done. The plurality of artificial feathers 53 are arranged in an annular shape on the surface 52a of the base body 52 so that the distance between them increases as the distance from the base body 52 increases. (See, for example, Patent Document 1).

JP 2009-160267 A

  Meanwhile, as shown in FIG. 5B, the conventional artificial feather 53 for a shuttlecock is formed by fixing a blade portion 60 to one end side of a shaft body 62, and the shaft body 62 is near the center of the blade portion 60. The fixing portion 62a extends over the entire length and is fixed to the blade portion 60, and the blade shaft portion 62b connected to the base body 52 is connected to the fixing portion 62a. In other words, the central portion of the blade portion 60 is fixed by the fixing portion 62 a of the shaft body 62. Therefore, depending on the material of the blade part 60 (for example, a thin film sheet made of resin, a foamable resin material, or the like), the rigidity of the blade part 60 cannot be maintained moderately, and the artificial feather 53 is annularly formed on the base body 52. In some cases, the ring shape cannot be satisfactorily maintained in the state of being arranged in the position. Therefore, as shown in FIG. 5A, a holding member 59 such as Tegs is wound around the periphery of the artificial feather 53 arranged in an annular shape to connect the artificial feathers 53 to each other, thereby forming an annular shape. It is also attempted to hold. This increases the number of manufacturing steps, increases the manufacturing cost, and deteriorates the assembly workability.

  The present invention has been made paying attention to the above-mentioned circumstances, and the purpose thereof is to have a separate rigidity for holding the annular arrangement of the blades with an appropriate rigidity capable of holding the shape of the blades alone. An object of the present invention is to provide a shuttlecock for badminton, a shuttlecock blade, and a manufacturing method thereof that do not require any members.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a shuttlecock blade in which a blade portion is fixed to one end side of a shaft body, and the shaft body includes a trunk portion and a branch extending from the trunk portion. The branch part extends substantially along the outer peripheral edge on both sides of the blade part, and is fixed to the blade part.

  According to the first aspect of the present invention, since the blade portion is supported from both sides by the branch portions of the shaft body extending substantially along the outer peripheral edges on both sides, the shape of the blade portion alone can be maintained. A shuttlecock blade having appropriate rigidity can be provided. Therefore, when the shuttlecock blades are arranged in an annular shape in order to manufacture the shuttlecock, the annular arrangement of the blade portions can be maintained without connecting the blade portions using a separate holding member. A shuttlecock having the same form can be obtained.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, branch portions on both sides of the blade portion are fixed to the blade portion without being connected at the tip. .

  According to the second aspect of the present invention, since the tips of both branch portions are fixed to the blade portion without being connected to each other, it is predetermined even for stress that presses the blade portion from both sides. While maintaining the rigidity, it is possible to impart moderate flexibility to the blade portion, and it is possible to obtain characteristics close to natural blades in terms of flight performance and shape return performance.

  The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the branch part extends from a common branch part of the trunk part.

  According to the third aspect of the invention, the same effect as that of the first or second aspect of the invention can be obtained, and the branch portion can be formed easily and compactly. Without impairing the performance of the part (while maintaining the characteristics close to natural feathers), the blade part can be supported appropriately.

  The invention according to claim 4 is the invention according to claim 3, characterized in that a plurality of the branch portions exist along the longitudinal axis direction of the trunk.

  According to the fourth aspect of the invention, the same effect as that of the third aspect of the invention can be obtained, and the number of branches can be increased according to the required performance. Generation can be realized.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein at least a part of the trunk portion is fixed to the blade portion.

  According to the fifth aspect of the present invention, the same effect as that of any one of the first to fourth aspects of the present invention can be obtained, and the rigidity of the blade portion is further increased by fixing the trunk portion. be able to. The trunk portion may be configured to be fixed to the blade portion throughout.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein an auxiliary branch part extending from the trunk part is provided in the blade part inside the branch parts on both sides. It is fixed.

  According to the sixth aspect of the present invention, the same effect as that of any one of the first to fifth aspects of the present invention can be obtained, and the rigidity of the blades can be adjusted (adjustment of shape retention). Can be performed by the auxiliary branch.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the shaft body has a surface opposite to a surface to which the blade portion is fixed. In addition, a hollow portion is formed.

  According to the seventh aspect of the invention, the same effect as that of the first to sixth aspects of the invention can be obtained, and the shaft body is provided with a surface to which the blade portion is fixed. Since a hollowing recess is formed on the opposite surface, the hollowing recess is arranged on the inner side of the shuttlecock facing the outer blade portion, reducing the extra air resistance, and natural An external shape close to a blade can be obtained.

  The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein one end side of the shaft body to which the blade portion is fixed is the other end side of the shaft body. It extends inclining with respect to the axis of the.

  According to the eighth aspect of the invention, the same effect as that of any one of the first to seventh aspects of the invention can be obtained, and one end of the shaft body to which the blade portion is fixed is obtained. Because the side is inclined with respect to the axis on the other end side of the shaft body, when the shuttlecock blades are attached to the base body, the blades are inevitably opened outward to manufacture the shuttlecock. As a result, an external shape close to that of a natural blade can be obtained, and characteristics close to that of a natural blade can be obtained.

  Moreover, this invention provides the shuttlecock for badminton which arrange | positions the shuttlecock blade | wing of any one of Claim 1 thru | or 8 in an annular | circular shape on a base body.

  According to this configuration, since each blade has a predetermined rigidity, there is no need to connect the blades, and the shuttlecock can be easily manufactured.

  Furthermore, the present invention provides a method for manufacturing the shuttlecock blade according to any one of claims 1 to 8, and the manufacturing method includes a cavity that forms the shape of the shaft body. The film made of a material forming the blade portion of the shuttlecock blade is pressed against the pressing surface of the fixed die by a movable die, and the film is heated by the pressure of the heated molten resin injected into the cavity. And a step of fusing and transferring the heated molten resin constituting the shaft body to the film by the heat of the heated molten resin, along the shape of the shuttlecock blades. And a step of cutting.

  According to such a method for manufacturing shuttlecock blades, it is possible to omit an adhesive bonding step and a blade formation step, and the manufacturing cost can be greatly reduced. Also, the adhesive strength between the film and the shaft can be improved by so-called film insert molding in which a film is interposed between the molds.

  According to the shuttlecock blade according to the present invention, since it has an appropriate rigidity capable of holding the shape of the blade portion alone, a separate holding member for holding the annular arrangement of the blade portion is required when the shuttlecock is manufactured. A badminton shuttlecock can be obtained. Further, according to the present invention, the shuttlecock blade having such rigidity can be easily manufactured.

The figure which shows one Embodiment of the shuttlecock for badminton which concerns on this invention. (A) is a front view of the shuttlecock blade | wing which comprises the shuttlecock shown in FIG. 1, (b) is a side view of the shuttlecock blade | wing shown to Fig.1 (a). (A) is a front view which shows another embodiment of the shuttlecock blade | wing which comprises a shuttlecock, (b) is a side view of the shuttlecock blade | wing shown to (a). The figure which shows roughly an example of the manufacturing process for manufacturing the shuttlecock blade | wing concerning this invention. (A) is a perspective view of the conventional shuttlecock for badminton, (b) is a front view of the shuttlecock blade | wing which comprises the shuttlecock of Fig. (A).

Hereinafter, with reference to the accompanying drawings, an embodiment of a shuttlecock for badminton, a shuttlecock blade, and a manufacturing method thereof according to the present invention will be described.
1 and 2 show a first embodiment of the present invention. FIG. 1 is a diagram showing a badminton shuttlecock, FIG. 2A is a front view of shuttlecock blades constituting the shuttlecock shown in FIG. 1, and FIG. 2B is FIG. 2A. It is a side view of the shuttlecock blade shown in FIG.

  As shown in FIG. 1, the badminton shuttlecock 1 of this embodiment includes a hemispherical base body 3 made of cork or the like, and a plurality (for example, 16 pieces) connected and fixed to a flat surface 3a of the base body 3. ) Shuttlecock blades (hereinafter simply referred to as blades) 10. The plurality of blades 10 are arranged in an annular shape on the surface 3 a of the base body 3 so that the distance between them increases as the distance from the base body 3 increases. Fixed to each other.

  As shown in FIG. 2, the blade 10 is formed by fixing a blade portion 12 to one end (tip) side of the shaft body 13. The shaft body 13 includes a trunk portion 13b whose base portion is connected and fixed to the base body 3, and a branch portion 13a extending from the trunk portion 13b. The branch portion 13a extends substantially along the outer peripheral edges on both sides of the blade portion 12. It is fixed to the blade part 12. Further, as shown in FIG. 1, the blade portion 12 includes an outer surface facing outward when the blade 10 is assembled in an annular shape, and an inner surface facing the inner surface of the annular shape. 13a is fixed on the inner surface. That is, in the shuttlecock 1, the outer surface, which is a flat surface of the blade portion 12, faces the outer side of the annular array and the inner surface of the blade portion 12 to which the branch portion 13 a is fixed is arranged so that unnecessary air resistance is not applied. Facing the inside of the ring array. Here, “extends substantially along” means that the branch portion 13a extends along the edge (outer peripheral edge) of the blade portion 12, or extends along the edge at a position slightly inside from the edge. Such forms are included. In addition, the extending direction includes a configuration in which the branch portions on both sides are finally connected integrally at the top, and a configuration in which they are not connected on the tip side as in this embodiment.

  In addition, all the branch parts 13a and 13a are branched and extended upwards from the common branch site | part 17 of the edge part of the trunk | drum 13b. Further, as shown in FIG. 2B, the branch portion 13a extends while being inclined with respect to the axis X of the trunk portion 13b (having an inclination angle θ with respect to the axis X). That is, one end (tip) side of the shaft body 13 to which the blade portion 12 is fixed is inclined with respect to the axis X on the other end (base end) side of the shaft body 13. Further, the shaft body 13 is formed with a lightening recess 16 for weight reduction on the surface opposite to the surface on which the blade portion 12 is fixed (in the figure, the lightening recess 16 is formed on the trunk portion 13b. Is shown).

  Further, in the configuration of the present embodiment, as described above, the branch portions 13a and 13a extending substantially along the outer peripheral edges on both sides of the blade portion 12 are configured not to be connected to each other on the tip side. That is, as shown in FIG. 2A, a branch made of only the film material of the blade portion 12 is provided between the tip portions of the branch portions 13a and 13a extending substantially along the outer peripheral edges on both sides of the blade portion 12. The discontinuous part 19 of the part 13a is present and does not extend along the entire outer peripheral edge.

  In the present embodiment, the two auxiliary branch portions 20, 20 extending from the trunk portion 13 b to the inside of the blade portion 12 are fixed to the blade portion 12. That is, in this embodiment, the four branch portions 13a, 13a, and 20, 20 extend side by side from the common branch portion 17, and the two branch portions 13a, 13a on both sides extending substantially along the outer peripheral edge. The two auxiliary branch parts 20 and 20 are arranged in between.

  In the above-described embodiment, the blade 12 is made of a resin film. Specifically, since the blade portion 12 is fixed to the shaft body 13, the material is selected in consideration of the fusion property with the material forming the shaft body 13. For example, as the blade portion 12, a resin film such as polypropylene, polyethylene, polyamide resin film, polyester resin film, PET film, a nonwoven fabric using chemical fibers or natural fibers, a resin as a coating layer on one or both sides of these nonwoven fabrics What coated the film (for example, lamination by coextrusion), paper, and what used the above-mentioned raw material for a part etc. can be used.

  In addition, as the material of the shaft body 13, any resin can be used. For example, a polyamide resin, a polyester resin, a polycarbonate resin, a polyimide resin, a polysulfone resin, or a composite plastic obtained by mixing glass fiber, carbon fiber, or the like can be used.

  According to the blade 10 having the above-described configuration, the blade portion 12 is supported from both sides by the branch portion 13a of the shaft body 13 extending substantially along the outer peripheral edges on both sides thereof, so that the shape of the blade portion alone is maintained. It is possible to obtain an appropriate rigidity. Therefore, when manufacturing the shuttlecock as shown in FIG. 1, when the blades 10 are arranged in an annular shape, the blade portions can be used without connecting adjacent blade portions 12, 12 using separate holding members. It can hold 12 circular arrays and can be assembled as a shuttlecock in the same way as natural feathers.

  In addition, by providing the branch portion 13a so as to extend substantially along the outer peripheral edge of the blade portion 12, for example, the blade portion itself may be deformed during messy handling or storage during the manufacture of the blade portion. Damage is effectively prevented. In addition, even if the shuttlecock is actually constructed and handled in a messy manner during actual use of the shuttlecock, or if there is a racquet hit and a drop impact after the hit, the blade part may Damage is effectively prevented. In other words, the use of a film-like member for the blade portion can reduce the weight, and the branch portion 13a increases the rigidity of the blade portion as a whole, so that the blade portion can be damaged or deformed even if stress is applied from the outside. This prevents the shuttle performance from being deteriorated.

  Moreover, in this embodiment, since branch part 13a, 13a extended along the outer periphery of the both sides of the above-mentioned blade | wing part 12 is not connected by the front-end | tip part, it is a blade | wing as shown by the arrow of Fig.2 (a). Even if stress that crushes the portion 12 acts (such stress is likely to occur when the shuttle is hit with a racket), the blade 12 is provided with appropriate flexibility while maintaining a predetermined rigidity. It is possible to obtain characteristics close to natural feathers in terms of flight performance and shape return performance.

  Further, in the present embodiment, the shaft body 13 is formed with the thinning recess 16 on the surface opposite to the surface on which the blade portion 12 is fixed, so that the blade portion 12 facing outward in the shuttlecock. Accordingly, the hollow recess 16 is disposed on the inner side, and an excessive air resistance is reduced, and an external shape close to that of a natural feather can be obtained. In order to reduce the weight, a through hole may be formed. However, since the strength is lowered and the air resistance is increased, the under hole 16 is formed on the inner side as described above. It is preferable. In this case, the shape of the lightening recess is not particularly limited.

  Further, according to the present embodiment, one end side of the shaft body 13 to which the blade portion 12 is fixed is inclined with respect to the axis X on the other end side of the shaft body 13 by an angle θ. When the blades 10 are mounted on the base body 3 in order to produce the shuttlecock as shown, each blade 10 is inevitably arranged to open outward, and an external shape close to that of a natural blade can be obtained. A characteristic close to that of a blade can be obtained. In particular, in the present embodiment, as will be described later, since the shuttlecock blade 10 is formed by film insert molding, it is possible to omit an adhesive bonding step and a blade formation step, thereby greatly reducing manufacturing costs. . Further, the film insert molding can improve the adhesive strength between the film and the shaft body, and the use of the film for the blade portion 12 enables a significant reduction in weight.

  FIG. 3 shows a shuttlecock blade 10A according to a second embodiment of the present invention. As shown in the figure, the shuttlecock blade 10A of the present embodiment is also formed by fixing the blade portion 12 to one end (tip) side of the shaft body 13 in the same manner as the above-described embodiment.

  The shaft body 13 includes a trunk portion 13b whose base portion is connected and fixed to the base body 3, and branch portions that individually extend from two branch portions 17 and 21 that are spaced apart in the longitudinal axis direction on the distal end side of the trunk portion 13b. (That is, in this embodiment, a plurality of branch portions exist along the longitudinal axis direction of the trunk portion 13b). In this case, the first branch portions 13 a extending on both sides from the first branch portion 17 located at the base portion of the blade portion 12 extend substantially along the outer peripheral edges on both sides of the blade portion 12 and are fixed to the blade portion 12. . Further, the second branch portions 13a ′ and 13a ′ extending on both sides from the second branch portion 21 located on the tip side of the first branch portion 17 extend across the inside of the blade portion 12, It merges with the corresponding first branch portion 13 a on the outer peripheral edge of the blade portion 12. That is, a part of the second branch portions 13a ′ and 13a ′ also serves as the auxiliary branch portion 20 described above. Further, in the present embodiment, the distal end side portion 13 b ′ of the trunk portion 13 b extends to the distal end through the central portion of the blade portion 12 and is fixed to the blade portion 12.

  Further, in the present embodiment, as shown in FIG. 3B, the branch portions 13a and 13a and the distal end side portion 13b 'of the trunk portion 13b extend while being inclined with respect to the axis X of the proximal end portion of the trunk portion 13b. (Having an inclination angle θ with respect to the axis X). That is, one end (tip) side of the shaft body 13 to which the blade portion 12 is fixed is inclined with respect to the axis X on the other end (base end) side of the shaft body 13. Further, the shaft body 13 is formed with a lightening recess 16 on the surface opposite to the surface on which the blade portion 12 is fixed (in the figure, the lightening recess 16 is shown on the trunk portion 13b). .

  Also in the present embodiment, the branch portions 13a, 13a extending substantially along the outer peripheral edges on both sides of the blade portion 12 are not connected to each other on the tip side. That is, as shown in FIG. 3A, a branch made of only the film material of the blade portion 12 is provided between the tip portions of the branch portions 13a and 13a extending substantially along the outer peripheral edges on both sides of the blade portion 12. The discontinuous part 19 of the part 13a exists.

According to the above configuration, it is possible to further increase the rigidity of the blade portion by increasing the branch portion to which the blade portion is fixed. In particular, when a thin film sheet is used as the material of the blade portion, damage to the blade portion can be prevented, the weight can be reduced, and blade generation according to the application can be realized. Furthermore, since a part of the trunk portion (tip side portion 13b ′) is also fixed to the blade portion 12, the rigidity of the blade portion 12 can be further increased.
That is, by adhering a part of the auxiliary branch part 20 and the trunk part (tip side portion 13b ′) as described above to the blade part 12, the rigidity adjustment (the shape holding adjustment) is performed according to the constituent material of the blade part. ) Can be easily performed.

FIGS. 4A to 4E are diagrams sequentially showing an example of a manufacturing process for manufacturing the blades 10 and 10A of the respective embodiments described above.
The above-described blades 10 and 10A can be manufactured by so-called film insert molding in which a film sheet is interposed when molding a mold.

  In this manufacturing process, first, as shown in FIG. 4A, the blades 10 and 10 </ b> A against the pressure-bonding surface 40 a of the fixed mold 40 having the cavity 45 that forms the shaft 13 of the blade 10 or 10 </ b> A. A film sheet 42 made of a material for forming the blade portion 12 is disposed, and is crimped by a movable mold 43. In this case, an injection unit 49 is connected to the fixed mold 40 for heating and melting the resin (material forming the shaft body) 48 introduced from the hopper 47 and injecting it into the cavity 45 of the fixed mold 40. Has been.

  Subsequently, as shown in FIG. 4B, the film sheet 42 is sandwiched between the molds 40 and 43 by the pressure of the heated molten resin injected into the cavity 45, and the blade 10 is heated by the heat of the heated molten resin. , 10A resin 48 is fused and transferred to the film 42. The state is shown in FIG. 4C (the movable mold 43 is separated from the fixed mold 40). Thereafter, as shown in FIG. 4D, when the film sheet 42 to which the resin 48 forming the shape of the blades 10 and 10A is transferred is cut along the shape of the blades 10 and 10A by a cutting device such as a laser device. As shown in FIG. 4E, the individual blades 10 and 10A can be obtained in a lump.

  In this case, if a cutter is formed on the mold side so as to correspond to each blade shape, when the movable mold 43 is separated from the fixed mold 40, the individual blades 10 and 10A are collectively moved. Can be obtained.

  According to the manufacturing method as described above, since the blades 10 and 10A are formed by film insert molding, an adhesive bonding step and a blade forming step can be omitted, and the manufacturing cost can be greatly reduced. In addition, since it is not necessary to use an adhesive separately, the weight is eliminated, and it is possible to achieve a significant weight reduction as a blade part (shuttle). Furthermore, the adhesive strength between the film and the shaft body can be improved by film insert molding, and the use of the film sheet 42 for the blade portion 12 enables a significant reduction in weight.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to above-described embodiment, It can change variously. For example, for the blades described above, it is sufficient that the branch portions constituting the shaft body have portions extending along the peripheral edges on both sides of the blade portions, and the arrangement of the other auxiliary branch portions is particularly limited. There is no. Further, the thickness of the branch part (auxiliary branch part) does not need to be uniform. For example, the branch part (auxiliary branch part) may be gradually reduced in diameter as it moves to the distal end side or may include a partially reduced area. good. Further, the configuration of the blade portion is not particularly limited, and for example, a configuration in which a portion constituting the film sheet is fixed to the trunk portion may be used.

DESCRIPTION OF SYMBOLS 1 Badminton shuttlecock 3 Base body 10, 10A Shuttlecock blade 12 Blade portion 13 Shaft body 13a, 13a 'Branch portion 13b Trunk portion 16 Meat removal recess portion 17, 21 Branch portion 20 Auxiliary branch portion 40 Fixed mold 40a Crimp surface 43 Movable mold 45 cavity

Claims (10)

A shuttlecock blade having a blade portion fixed to one end of a shaft body,
The shaft body has a trunk part and a branch part extending from the trunk part,
The shuttlecock blade according to claim 1, wherein the branch portion extends substantially along outer peripheral edges on both sides of the blade portion and is fixed to the blade portion.   2. The shuttlecock blade according to claim 1, wherein branch portions on both sides of the blade portion are fixed to the blade portion without being connected at the tip.   3. The shuttlecock blade according to claim 1, wherein the branch portion is branched and extends from a common branch portion of the trunk portion.   4. The shuttlecock blade according to claim 3, wherein a plurality of the branch portions are present along a longitudinal axis direction of the trunk portion.   The shuttlecock blade according to any one of claims 1 to 4, wherein at least a part of the trunk portion is fixed to the blade portion.   The shuttlecock blade according to any one of claims 1 to 5, wherein an auxiliary branch portion extending from the trunk portion is fixed to the blade portion inside the branch portions on both sides.   The said shaft body is formed with a lightening recess on a surface opposite to a surface on which the blade portion is fixed. 7. Shuttlecock blade.   The one end side of the said shaft body to which the said blade | wing part adheres is inclined and extended with respect to the axis line of the other end side of a shaft body, The any one of Claim 1 thru | or 7 characterized by the above-mentioned. Shuttlecock blades.   A shuttlecock for badminton, wherein the shuttlecock blade according to any one of claims 1 to 8 is arranged in an annular shape on a base body. A method for manufacturing the shuttlecock blade according to any one of claims 1 to 8,
Crimping a film made of a material forming a blade portion of the shuttlecock blade with a movable die against a pressure-bonding surface of a fixed die having a cavity that forms the shape of the shaft body;
Clamping the film between the molds by the pressure of the heated molten resin injected into the cavity, and fusing and transferring the heated molten resin constituting the shaft body to the film by the heat of the heated molten resin;
Cutting the resin-transferred film along the shape of the shuttlecock blade;
A method for manufacturing shuttlecock blades.

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