WO2020121522A1 - Dart shaft, dart member, and dart - Google Patents

Dart shaft, dart member, and dart Download PDF

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Publication number
WO2020121522A1
WO2020121522A1 PCT/JP2018/046133 JP2018046133W WO2020121522A1 WO 2020121522 A1 WO2020121522 A1 WO 2020121522A1 JP 2018046133 W JP2018046133 W JP 2018046133W WO 2020121522 A1 WO2020121522 A1 WO 2020121522A1
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Prior art keywords
flight
shaft
screw
darts
dart
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PCT/JP2018/046133
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French (fr)
Japanese (ja)
Inventor
ゲイリー プラマー
エイドリアン リー
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株式会社Ｔａｒｇｅｔ Ｓｐｏｒｔｓ Ｊａｐａｎ
ターゲット・スポーツ・リミテッド
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Application filed by 株式会社Ｔａｒｇｅｔ Ｓｐｏｒｔｓ Ｊａｐａｎ, ターゲット・スポーツ・リミテッド filed Critical 株式会社Ｔａｒｇｅｔ Ｓｐｏｒｔｓ Ｊａｐａｎ
Priority to PCT/JP2018/046133 priority Critical patent/WO2020121522A1/en
Priority to JP2019559376A priority patent/JP6751931B1/en
Publication of WO2020121522A1 publication Critical patent/WO2020121522A1/en

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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B65/00—Implements for throwing  ; Mechanical projectors, e.g. using spring force
    • A63B65/02—Spears or the like ; Javelins

Definitions

  • the present invention relates to a dart shaft, a dart member, and darts using the same.
  • the mainstream darts are composed of tips, barrels, shafts, and flights.
  • the tip is the tip of the darts and is the part that is pierced.
  • the barrel is a weight that is connected to the tip and is the part that is gripped when setting.
  • the shaft is the part that connects the barrel and flight. By changing the shape of the shaft, the trajectory of the darts can be changed when the darts are thrown.
  • a flight is a vane part connected to a shaft. The air resistance of the blades allows the darts to obtain stable flight. The darts are completed by assembling these parts.
  • connection between the flight and the shaft be rotatable. This is because when the first dart is pierced, the second dart thrown next hits the flight of the first dart and the first dart is less likely to break. In addition, the second dart is not repelled by the first dart.
  • Patent Document 1 in order to rotatably connect the flight and the shaft, a concave groove and a projection are provided and fitted in the distal end of the hollow cylindrical cap-type flight and the rear end of the shaft. Rotatably connecting the flight and the shaft.
  • an object of the present invention is to provide a new joining method in which frictional force is hard to work between the dart shaft and the flight.
  • An object of the present invention is to rotatably join a dart shaft and a flight by adjusting the fixing strength and the easiness of rotation.
  • the shaft for darts of the present invention is A cylindrical flight joint including a shaft screw portion having a male screw continuing from one end side to the other end side of the barrel connecting portion and a flight screw accommodating portion continuing from the shaft screw portion to the other end side, and having a cylindrical end.
  • a shaft for darts that is joined to a flight that has a female screw on its section By fitting the flight into the darts shaft and rotating the male screw of the shaft screw part and the female screw of the flight screw part, the flight and the darts shaft are joined, The flight line is rotatably joined to the darts shaft by the axial length of the flight screw accommodating portion being longer than the axial length of the female screw.
  • the darts using the darts shaft of the present invention do not use frictional force for joining the shaft and the flight, and thus can be easily rotated.
  • the present invention is also characterized in that the diameter of the flight screw accommodating portion is smaller than the inner diameter of the female screw of the flight.
  • the present invention is also characterized in that one end side of the male screw of the darts shaft is followed by a cylindrical flight guide portion.
  • the flight guide section guides the flight and determines the axis about which the flight rotates. Further, by adjusting the size of the columnar shape of the flight guide portion, it is possible to increase the frictional force at the joint between the shaft and the flight. Therefore, the balance between the fixing strength of the shaft and the flight and the ease of rotation can be adjusted.
  • the darts member of the present invention is A shaft for darts having a columnar flight joint including a shaft screw portion including a male screw continuing from one end side to the other end side of the barrel connecting portion, and a flight screw accommodating portion continuing from the shaft screw portion to the other end side.
  • a flight including a cylindrical shaft joint portion including a flight screw portion including a female screw, and a shaft screw accommodating portion continuing from the flight screw portion to the inner portion,
  • a member for darts comprising: By fitting the shaft joint portion into the flight joint portion and rotating the male screw of the shaft screw portion and the female screw of the flight screw portion, the flight is joined to the darts shaft, When the flight screw accommodation portion has an axial length longer than that of the female screw, the flight is rotatably joined to the darts shaft.
  • the friction force is not involved in the joint between the shaft and the flight, and thus the ease of rotation can be improved.
  • the present invention is also characterized in that the diameter of the flight screw accommodating portion is smaller than the inner diameter of the female screw of the flight.
  • one end side of the male screw of the darts shaft is followed by a columnar flight guide part, and a cylindrical flight guide part accommodating part follows the inner part of the shaft screw accommodating part of the flight. It is characterized by
  • the flight guide section guides the flight guide accommodation section and defines the axis about which the flight rotates. Further, by increasing the diameter of the columnar shape of the flight guide portion, it is possible to increase the frictional force of joining the shaft and the flight. Further, by reducing the diameter of the cylindrical shape of the flight guide accommodating portion, it is possible to increase the frictional force at the joint between the shaft and the flight. Therefore, the balance between the fixing strength of the shaft and the flight and the ease of rotation can be adjusted.
  • the darts of the present invention is characterized by comprising the shaft for darts or the member for darts.
  • the darts using the darts shaft or darts member of the present invention does not use frictional force for joining the shaft and the flight, and thus can be easily rotated.
  • the darts using the dart shaft or the dart member of the present invention can adjust the balance between the fixing strength of the dart and the flight and the easiness of rotation. Therefore, darts that are hard to break and easy to play are provided.
  • FIG. 1 is a schematic diagram of a shaft for darts of one embodiment of the present invention. It is an enlarged view of the flight joint part A of FIG. 1 is a schematic diagram of a flight of one embodiment of the present invention.
  • FIG. 4 is a BB diagram of the flight of FIG. 3.
  • FIG. 4 is a sectional view taken along line CC of the flight shown in FIG. 3.
  • FIG. 3 is an exploded view of a flight joint of one embodiment of the present invention.
  • FIG. 3 is an exploded view of a shaft joint according to one embodiment of the present invention.
  • FIG. 6 is an exploded view of joining the flight and shaft of one embodiment of the present invention. It is a cross-sectional enlarged view of the joining part which joined the shaft and flight of one Embodiment of this invention.
  • 1 is a schematic diagram of darts according to one embodiment of the present invention.
  • FIG. 8 is a schematic diagram of darts according to one embodiment of the present invention. The darts of the present invention will be described with reference to FIG.
  • a dart 801 according to one embodiment of the present invention includes a tip 803, a barrel 805, a shaft 807, and a flight 809.
  • the tip 803 is a tip portion of the dart 801 and is a portion to be pierced.
  • the barrel 805 is a weight connected to the tip 803, and is a part to be gripped when the setting is performed.
  • the shaft 807 is a part that connects the barrel 805 and the flight 809. By changing the shape of the shaft 807, the trajectory of the darts 801 can be changed when the darts 801 are thrown.
  • the flight 809 is a blade portion connected to the shaft 807. The air resistance of the blade allows the dart 801 to obtain stable flight.
  • the darts 801 are completed by assembling these parts.
  • FIG. 1 is a schematic view of a dart shaft according to one embodiment of the present invention.
  • FIG. 2 is an enlarged view of the flight joint portion A of FIG.
  • the shaft for darts of the present invention (hereinafter, simply referred to as shaft) will be described with reference to FIGS. 1 and 2.
  • the tip portion 107 which is the other end side of the shaft 101, is connected to the barrel.
  • the tip of the tip 107 is threaded (not shown) to connect to the barrel.
  • the handle 105 is a portion that gives the shaft 101 a length. Since the flight path of the darts changes depending on the length of the handle 105, the shaft 101 having a different length of the handle 105 can be manufactured according to the user's request.
  • the rear end 103 which is one end of the shaft 101, is connected to the flight.
  • FIG. 2 is an enlarged view of the flight joint portion A that is the rear end portion 103.
  • the flight joint portion 201 has a cylindrical shape.
  • the flight joint portion 201 includes a flight guide portion 203 that continues from one end side to the other end side of the barrel connection portion, a shaft screw portion 205 that includes a male screw that continues from the flight guide portion 203 to the other end side, and a shaft screw portion 205. And a flight screw accommodating portion 207 continuing to the other end side.
  • the flight guide section 203 is inserted into a flight having a cylindrical shape described later. Therefore, the flight guide unit 203 guides the flight screw.
  • the diameter of the flight guide portion 203 is smaller than the inner diameter of the internal thread of the flight.
  • the flight guide unit 203 also defines the axis about which the flight rotates.
  • the flight guide portion 203 may not be provided.
  • the shaft screw portion 205 is a male screw formed in a cylindrical shape. After the flight is fitted into the flight joint of the shaft, the shaft screw portion 205 rotates with the female thread inside the cylindrical shape of the flight, thereby joining the shaft and the flight.
  • the flight screw accommodating portion 207 rotatably accommodates a flight female screw. This is because the axial length of the flight screw housing portion 207 is longer than the axial length of the female screw of the flight.
  • the diameter of the flight screw accommodating portion 207 is smaller than the inner diameter of the female screw of the flight. That is, the flight screw accommodating portion 207 becomes a space where the female threads of the flight do not contact or only the threads are in contact. By doing so, the flight and the shaft can be joined with almost no friction.
  • the screw thread of the shaft thread portion 205 has a dimensional difference a in consideration of contact inside the cylindrical shape of the flight. By tapering the thread on the terminal side, it is easy to enter the cylindrical shape of the flight. Further, at the time of joining, the contact between the shaft and the flight is reduced to reduce the friction generated there.
  • the darts using the darts shaft of the present invention do not use frictional force for joining the shaft and the flight, and thus can be easily rotated.
  • the diameter of the flight screw accommodating portion is smaller than the inner diameter of the female screw of the flight, so that the frictional force at the joint between the shaft and the flight can be reduced.
  • a cylindrical flight guide section continues to one end side of the male screw of the dart shaft of the present invention.
  • the flight guide unit guides the flight and defines an axis about which the flight rotates. Further, by adjusting the size of the columnar shape of the flight guide portion, it is possible to increase the frictional force at the joint between the shaft and the flight. Therefore, the balance between the fixing strength of the shaft and the flight and the ease of rotation can be adjusted.
  • FIG. 3 is a schematic diagram of a flight of one embodiment of the present invention.
  • FIG. 4 is an arrow BB view of the flight of FIG.
  • FIG. 5 is a sectional view taken along line CC of the flight shown in FIG. A flight of one embodiment of the present invention will be described with reference to FIGS.
  • the flight 301 includes a shaft joint portion 303, and the shaft joint portion 303 and the blade 305 are integrally molded.
  • FIG. 4 which is a view taken along the line BB, in the flight 401, four blades 403, 405, 407, and 409 are connected at right angles to each other.
  • the shaft joint 411 is located at the center of the blades 403, 405, 407, 409. With such a configuration, it is possible to obtain stability of dart flight.
  • the shaft joint 501 will be described with reference to FIG.
  • the shaft joint 501 has a cylindrical shape.
  • the shaft joint portion 501 includes a flight screw portion 503 having a female screw, a shaft screw accommodating portion 505 continuing from the flight screw portion to the inner portion, and a flight guide portion accommodating portion 507 continuing from the shaft screw accommodating portion 505 to the inner portion.
  • the flight screw part 503 is guided by the flight guide part 203 of the shaft, screwed together by the shaft screw part 205 of the shaft, and housed in the flight screw housing part 207 of the shaft.
  • the shaft screw accommodating portion 505 accommodates the shaft screw portion 205 of the shaft.
  • the flight guide portion accommodating portion 507 accommodates the flight guide portion 203 of the shaft. The flight guide portion accommodating portion 507 may not be provided if the flight guide portion 203 is not provided.
  • FIG. 6 is a diagram in which a darts member including a shaft and a flight according to an embodiment of the present invention is joined.
  • FIG. 7A is an exploded view of a flight joint of one embodiment of the present invention.
  • FIG. 7B is an exploded view of the shaft joint of one embodiment of the present invention.
  • FIG. 7C is an exploded view of joining the flight and shaft of one embodiment of the present invention.
  • FIG. 7D is an enlarged cross-sectional view of the joint portion where the shaft and the flight portion of one embodiment of the present invention are joined.
  • FIG. 6 shows a diagram in which a darts member composed of a shaft 601 and a flight 603 is joined.
  • the shaft 601 and the flight 603 are rotatably joined to the right and left.
  • the shaft 601 and the flight 603 can be joined without looseness. The size will be described later with reference to FIGS. 7A and 7B.
  • the shaft 701 includes a flight guide portion 705, a shaft screw portion 707, and a flight screw accommodating portion 709 at the flight joint portion.
  • the flight 703 includes a flight screw portion 711, a shaft screw accommodation portion 713, and a flight guide portion accommodation portion 715 at the shaft joint portion.
  • the flight guide portion 705 is housed in the flight guide portion housing portion 715, and the shaft screw portion 707 is housed in the shaft screw housing portion 713.
  • the flight screw portion 711 is accommodated in the flight screw accommodation portion 709.
  • the axial length L4 of the flight screw portion 711 is slightly shorter than the axial length L1 of the flight screw accommodating portion 709.
  • L4 has a length of between 80% and 100%, preferably 91% and 98% of L1. For example, if L1 is 5.33 mm, L4 is 5.03 mm.
  • the axial length L2 of the shaft screw portion 707 is slightly shorter than the axial length L5 of the shaft screw accommodating portion.
  • L2 is between 80% and 100% of L5, preferably between 86% and 96%.
  • L5 is 3.82 mm
  • L2 is 3.50 mm.
  • the shaft screw part is housed in the shaft screw housing part, and the flight screw part is housed in the flight screw housing part, so that the screw engagement is disengaged. Therefore, when the flight rotates to the right, it does not tighten, and when the flight rotates to the left, it does not come off.
  • the diameter d1 of the flight screw housing portion 709 is smaller than the inner diameter d4 of the flight screw portion 711. That is, the flight screw accommodating portion 709 becomes a space where the female screw of the flight does not contact or only a part of the screw thread contacts.
  • d1 is between 80% and 100% of d4, preferably between 83% and 93% long. For example, if d4 is 3.31 mm, d1 is 2.90 mm.
  • the diameter d5 of the shaft screw housing portion 713 is larger than the outer diameter d2 of the shaft screw portion 707.
  • the shaft screw accommodating portion 713 becomes a space where the male screw of the shaft does not contact or only a part of the screw thread contacts.
  • d5 has a length of between 100 and 120% of d2, preferably between 108% and 118%. For example, if d2 is 3.80 mm, d5 is 4.30 mm.
  • the flight guide part accommodating part 715 can increase the friction between the shaft 701 and the flight 703 by slightly increasing the size of the flight guide part 705 so that the flight guide part 705 is press-fitted.
  • L6 has a length between 100% and 150% of L3, preferably between 105% and 115%. For example, if L3 is 6.17 mm, L6 is 6.75 mm. For example, the sum of the axial length L1 of the flight screw housing and the axial length L2 of the shaft screw portion is 0.02 mm shorter than the sum of the axial length L4 of the flight screw portion and the axial length L5 of the shaft screw housing. Therefore, L3 and L6 may have the same length.
  • d6 has a length between 100% and 120% of d3, preferably between 102% and 112%. For example, if d3 is 2.90 mm, d6 is 3.10 mm.
  • the friction force is not involved in the joint between the shaft and the flight, and thus the ease of rotation can be improved.
  • the diameter of the flight screw accommodating portion is smaller than the inner diameter of the female screw of the flight, so that the frictional force at the joint between the shaft and the flight can be reduced.
  • the flight guide section guides the flight guide accommodation section and defines the axis about which the flight rotates. Further, by increasing the diameter of the columnar shape of the flight guide portion, it is possible to increase the frictional force of joining the shaft and the flight. Further, by reducing the diameter of the cylindrical shape of the flight guide accommodating portion, it is possible to increase the frictional force at the joint between the shaft and the flight. Therefore, the balance between the fixing strength of the shaft and the flight and the ease of rotation can be adjusted.
  • darts using the dart shaft or the dart member of the present invention can adjust the balance between the fixing strength of the dart and the flight and the easiness of rotation. Therefore, darts that are hard to break and easy to play are provided.
  • the present invention can be applied to darts.

Abstract

Provided is a dart shaft (701) to be joined to a flight (703) comprising a female screw on a cylindrically shaped end by a columnar flight joining part comprising: a shaft screw part (707) comprising a male screw continuing from one end to the other end of a barrel connecting part; and a flight screw accommodating part (709) continuing from the shaft screw part (707) to the other end. The flight (703) and the dart shaft (701) are joined by inserting the flight (703) into the dart shaft (701) and turning the male screw of the shaft screw part (707) and the female screw of the flight screw part (711). The flight (703) is rotatably joined to the dart shaft (701) by way of the axial length of the flight screw accommodating part (709) being longer than the axial length of the female screw.

Description

ダーツ用シャフト、ダーツ用部材、及びダーツDarts shaft, darts member, and darts
　本発明は、ダーツ用シャフト、ダーツ用部材及びそれらを用いたダーツに関する。 The present invention relates to a dart shaft, a dart member, and darts using the same.
　現在主流のダーツは、ティップと、バレルと、シャフトと、フライトとから構成されている。ティップは、ダーツの先端部であり、的に突き刺さる部分である。バレルは、ティップにつながるおもりであり、セッティングしたときに握る部分である。 Currently, the mainstream darts are composed of tips, barrels, shafts, and flights. The tip is the tip of the darts and is the part that is pierced. The barrel is a weight that is connected to the tip and is the part that is gripped when setting.
　また、シャフトは、バレルとフライトを繋ぐ部分である。シャフトの形状を変えることで、ダーツを投げたときに、ダーツの軌道を変化させることができる。フライトは、シャフトに接続される羽根部分である。この羽根の空気抵抗によりダーツは、安定した飛行を得ることができる。これらの部品を組み立てることで、ダーツが完成する。 　The shaft is the part that connects the barrel and flight. By changing the shape of the shaft, the trajectory of the darts can be changed when the darts are thrown. A flight is a vane part connected to a shaft. The air resistance of the blades allows the darts to obtain stable flight. The darts are completed by assembling these parts.
　ここで、フライトとシャフトとの接続は、回転可能にされることが重要であった。これは、的に第１のダーツが刺さっているとき、次に投げる第２のダーツが第１のダーツのフライトに当たっても、第１のダーツが壊れにくいためである。また、第２のダーツが第１のダーツにはじかれることもない。 　Here, it was important that the connection between the flight and the shaft be rotatable. This is because when the first dart is pierced, the second dart thrown next hits the flight of the first dart and the first dart is less likely to break. In addition, the second dart is not repelled by the first dart.
　特許文献１には、フライトとシャフトが回転可能に接続されるために、中空筒状のキャップ式のフライトの先端部と、シャフトの後端部に、凹溝と突起を設け、嵌合させることで、フライトとシャフトを回転可能に接続することが記載されている。 In Patent Document 1, in order to rotatably connect the flight and the shaft, a concave groove and a projection are provided and fitted in the distal end of the hollow cylindrical cap-type flight and the rear end of the shaft. Rotatably connecting the flight and the shaft.
特許第４３５０１５４号公報Japanese Patent No. 4350154
　ダーツが安定した飛行を得るためには、シャフトとフライトの接合は、飛んでいるときは固定されることが重要である。一方、刺さったダーツのシャフトとフライトの接合は、適度に回転可能にされることが重要である。 　In order for the darts to get a stable flight, it is important that the joint between the shaft and the flight is fixed when flying. On the other hand, it is important that the shaft of the pierced darts and the joint of the flight be appropriately rotatable.
　しかしながら、特許文献１に記載のダーツは、キャップ方式によりシャフトとフライトの固定がなされている。そのため、シャフトとフライトの間に摩擦力が働き、回転しにくかった。また、シャフトとフライトの微妙な製造誤差により摩擦力が変化してしまい、固定の強さと回転のしやすさのバランスを調整することが難しかった。 However, in the dart described in Patent Document 1, the shaft and the flight are fixed by the cap method. Therefore, a frictional force acts between the shaft and the flight, making it difficult to rotate. Further, the frictional force changes due to a slight manufacturing error between the shaft and the flight, making it difficult to adjust the balance between the strength of fixing and the ease of rotation.
　そこで、本発明は、ダーツのシャフトとフライトの間で摩擦力が働きにくい新たな接合方法を提供することを課題とする。本発明は、ダーツのシャフトとフライトを固定の強さと回転のしやすさを調整して、回転可能に接合することを課題とする。 Therefore, an object of the present invention is to provide a new joining method in which frictional force is hard to work between the dart shaft and the flight. An object of the present invention is to rotatably join a dart shaft and a flight by adjusting the fixing strength and the easiness of rotation.
　本発明のダーツ用シャフトは、
　一端側からバレル接続部の他端側に続く雄ねじを備えるシャフトねじ部と、前記シャフトねじ部から他端側へ続くフライトねじ収容部と、を備える円柱形状のフライト接合部で、円筒形状の端部に雌ねじを備えるフライトと接合するダーツ用シャフトであって、
　前記フライトを前記ダーツ用シャフトにはめ込み、前記シャフトねじ部の前記雄ねじと前記フライトねじ部の前記雌ねじとを回すことで、前記フライトと前記ダーツ用シャフトが接合され、
　前記フライトねじ収容部の軸線長さが前記雌ねじよりの軸線長さよりも長いことで、前記フライトは、前記ダーツ用シャフトと回転可能に接合される、ことを特徴とする。 The shaft for darts of the present invention is
A cylindrical flight joint including a shaft screw portion having a male screw continuing from one end side to the other end side of the barrel connecting portion and a flight screw accommodating portion continuing from the shaft screw portion to the other end side, and having a cylindrical end. A shaft for darts that is joined to a flight that has a female screw on its section,
By fitting the flight into the darts shaft and rotating the male screw of the shaft screw part and the female screw of the flight screw part, the flight and the darts shaft are joined,
The flight line is rotatably joined to the darts shaft by the axial length of the flight screw accommodating portion being longer than the axial length of the female screw.
　本発明のダーツ用シャフトを用いたダーツは、シャフトとフライトの接合に摩擦力を用いないため、回転のしやすさを向上させることができる。 The darts using the darts shaft of the present invention do not use frictional force for joining the shaft and the flight, and thus can be easily rotated.
　また、本発明は、前記フライトねじ収容部の径は、前記フライトの雌ねじの内径よりも小さい、ことを特徴とする。 The present invention is also characterized in that the diameter of the flight screw accommodating portion is smaller than the inner diameter of the female screw of the flight.
　このようにすることで、シャフトとフライトの接合の摩擦力を減らすことができる。 By doing this, it is possible to reduce the frictional force at the joint between the shaft and the flight.
　また、本発明は、前記ダーツ用シャフトの雄ねじの一端側は、円柱形状のフライトガイド部が続いている、ことを特徴とする。 The present invention is also characterized in that one end side of the male screw of the darts shaft is followed by a cylindrical flight guide portion.
　フライトガイド部は、フライトを案内し、フライトが回転する軸を定める。また、フライトガイド部の円柱形状の大きさを調整することで、シャフトとフライトの接合の摩擦力を増加することが可能である。したがって、シャフトとフライトの固定の強さと回転のしやすさとのバランスを調整できる。 The flight guide section guides the flight and determines the axis about which the flight rotates. Further, by adjusting the size of the columnar shape of the flight guide portion, it is possible to increase the frictional force at the joint between the shaft and the flight. Therefore, the balance between the fixing strength of the shaft and the flight and the ease of rotation can be adjusted.
　本発明のダーツ用部材は、
　一端側からバレル接続部の他端側に続く雄ねじを備えるシャフトねじ部と、前記シャフトねじ部から他端側に続くフライトねじ収容部と、を備える円柱形状のフライト接合部を有するダーツ用シャフトと、
　雌ねじを備えるフライトねじ部と、前記フライトねじ部から奥部に続くシャフトねじ収容部と、を備える円筒形状のシャフト接合部を含むフライトと、
　を備えるダーツ用部材であって、
　前記シャフト接合部を前記フライト接合部にはめ込み、前記シャフトねじ部の前記雄ねじと前記フライトねじ部の前記雌ねじとを回すことで、前記フライトが前記ダーツ用シャフトに接合され、
　前記フライトねじ収容部の軸線長さが前記雌ねじの軸線長さよりも長いことで、前記フライトは、前記ダーツ用シャフトと回転可能に接合される、ことを特徴とする。 The darts member of the present invention is
A shaft for darts having a columnar flight joint including a shaft screw portion including a male screw continuing from one end side to the other end side of the barrel connecting portion, and a flight screw accommodating portion continuing from the shaft screw portion to the other end side. ,
A flight including a cylindrical shaft joint portion including a flight screw portion including a female screw, and a shaft screw accommodating portion continuing from the flight screw portion to the inner portion,
A member for darts comprising:
By fitting the shaft joint portion into the flight joint portion and rotating the male screw of the shaft screw portion and the female screw of the flight screw portion, the flight is joined to the darts shaft,
When the flight screw accommodation portion has an axial length longer than that of the female screw, the flight is rotatably joined to the darts shaft.
　本発明のダーツ用部材を用いたダーツは、シャフトとフライトの接合に摩擦力は関係しないため、回転のしやすさを向上させることができる。 In the darts using the darts member of the present invention, the friction force is not involved in the joint between the shaft and the flight, and thus the ease of rotation can be improved.
　また、本発明は、前記フライトねじ収容部の径は、前記フライトの雌ねじの内径よりも小さい、ことを特徴とする。 The present invention is also characterized in that the diameter of the flight screw accommodating portion is smaller than the inner diameter of the female screw of the flight.
　このようにすることで、シャフトとフライトの接合の摩擦力を減らすことができる。 By doing this, it is possible to reduce the frictional force at the joint between the shaft and the flight.
　また、本発明は、前記ダーツ用シャフトの雄ねじの一端側は、円柱形状のフライトガイド部が続いており、前記フライトの前記シャフトねじ収容部の奥部に円筒形状のフライトガイド部収容部が続いている、ことを特徴とする。 Further, in the present invention, one end side of the male screw of the darts shaft is followed by a columnar flight guide part, and a cylindrical flight guide part accommodating part follows the inner part of the shaft screw accommodating part of the flight. It is characterized by
　フライトガイド部は、フライトガイド部収容部を案内し、フライトが回転する軸を定める。また、フライトガイド部の円柱形状の径を大きくすることで、シャフトとフライトの接合の摩擦力を増加することができる。さらに、フライトガイド部収容部の円筒形状の径を小さくすることで、シャフトとフライトの接合の摩擦力を増加することができる。したがって、シャフトとフライトの固定の強さと回転のしやすさとのバランスを調整できる。 The flight guide section guides the flight guide accommodation section and defines the axis about which the flight rotates. Further, by increasing the diameter of the columnar shape of the flight guide portion, it is possible to increase the frictional force of joining the shaft and the flight. Further, by reducing the diameter of the cylindrical shape of the flight guide accommodating portion, it is possible to increase the frictional force at the joint between the shaft and the flight. Therefore, the balance between the fixing strength of the shaft and the flight and the ease of rotation can be adjusted.
　また、本発明のダーツは、
　上記ダーツ用シャフト、または上記ダーツ用部材を備えることを特徴とする。 In addition, the darts of the present invention,
It is characterized by comprising the shaft for darts or the member for darts.
　本発明のダーツ用シャフトまたはダーツ用部材を用いたダーツは、シャフトとフライトの接合に摩擦力を用いないため、回転のしやすさを向上させることができる。本発明のダーツ用シャフトまたはダーツ用部材を用いたダーツは、ダーツとフライトの固定の強さと回転のしやすさのバランスを調整できる。そのため、壊れにくく、競技しやすいダーツが提供される。 The darts using the darts shaft or darts member of the present invention does not use frictional force for joining the shaft and the flight, and thus can be easily rotated. The darts using the dart shaft or the dart member of the present invention can adjust the balance between the fixing strength of the dart and the flight and the easiness of rotation. Therefore, darts that are hard to break and easy to play are provided.
本発明の１つの実施形態のダーツ用シャフトの概略図である。It is a schematic diagram of a shaft for darts of one embodiment of the present invention. 図１のフライト接合部Ａの拡大図である。It is an enlarged view of the flight joint part A of FIG. 本発明の１つの実施形態のフライトの概略図である。1 is a schematic diagram of a flight of one embodiment of the present invention. 図３のフライトの矢視Ｂ－Ｂ図である。FIG. 4 is a BB diagram of the flight of FIG. 3. 図３のフライトのＣ－Ｃ断面図である。FIG. 4 is a sectional view taken along line CC of the flight shown in FIG. 3. 本発明の１つの実施形態のシャフトとフライトからなるダーツ用部材を接合した図である。It is the figure which joined the member for darts which consists of a shaft and a flight of one embodiment of the present invention. 本発明の１つの実施形態のフライト接合部の分解図である。FIG. 3 is an exploded view of a flight joint of one embodiment of the present invention. 本発明の１つの実施形態のシャフト接合部の分解図である。FIG. 3 is an exploded view of a shaft joint according to one embodiment of the present invention. 本発明の１つの実施形態のフライトとシャフトを接合している分解図である。FIG. 6 is an exploded view of joining the flight and shaft of one embodiment of the present invention. 本発明の１つの実施形態のシャフトとフライトを接合した接合部の断面拡大図である。It is a cross-sectional enlarged view of the joining part which joined the shaft and flight of one Embodiment of this invention. 本発明の１つの実施形態のダーツの概略図である。1 is a schematic diagram of darts according to one embodiment of the present invention.
　以下、図面を参照しながら、本発明を実施するための実施形態を説明する。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
（ダーツの説明）
　図８は、本発明の１つの実施形態のダーツの概略図である。図８を参照して、本発明のダーツについて説明する。 (Explanation of darts)
FIG. 8 is a schematic diagram of darts according to one embodiment of the present invention. The darts of the present invention will be described with reference to FIG.
　図８を参照して、本発明の１つの実施形態のダーツ８０１は、ティップ８０３と、バレル８０５と、シャフト８０７と、フライト８０９とから構成されている。ティップ８０３は、ダーツ８０１の先端部であり、的に突き刺さる部分である。バレル８０５は、ティップ８０３につながるおもりであり、セッティングしたときに握る部分である。 Referring to FIG. 8, a dart 801 according to one embodiment of the present invention includes a tip 803, a barrel 805, a shaft 807, and a flight 809. The tip 803 is a tip portion of the dart 801 and is a portion to be pierced. The barrel 805 is a weight connected to the tip 803, and is a part to be gripped when the setting is performed.
　また、シャフト８０７は、バレル８０５とフライト８０９を繋ぐ部分である。シャフト８０７の形状を変えることで、ダーツ８０１を投げたときに、ダーツ８０１の軌道を変化させることができる。フライト８０９は、シャフト８０７に接続される羽根部分である。この羽根の空気抵抗によりダーツ８０１は、安定した飛行を得ることができる。これらの部品を組み立てることで、ダーツ８０１が完成する。 Also, the shaft 807 is a part that connects the barrel 805 and the flight 809. By changing the shape of the shaft 807, the trajectory of the darts 801 can be changed when the darts 801 are thrown. The flight 809 is a blade portion connected to the shaft 807. The air resistance of the blade allows the dart 801 to obtain stable flight. The darts 801 are completed by assembling these parts.
（ダーツ用シャフトの説明）
　図１は、本発明の１つの実施形態のダーツ用シャフトの概略図である。図２は、図１のフライト接合部Ａの拡大図である。図１及び図２を参照して、本発明のダーツ用シャフト（以下、単にシャフトという。）を説明する。 (Explanation of shaft for darts)
FIG. 1 is a schematic view of a dart shaft according to one embodiment of the present invention. FIG. 2 is an enlarged view of the flight joint portion A of FIG. The shaft for darts of the present invention (hereinafter, simply referred to as shaft) will be described with reference to FIGS. 1 and 2.
　図１を参照して、シャフト１０１の他端側である先端部１０７は、バレルと接続される。先端部１０７の先にはねじが切ってあり（図示せず）、これによりバレルと接続する。柄部１０５は、シャフト１０１に長さを与える部分である。柄部１０５の長さによって、ダーツの飛行軌道が変わるため、使用者の要求によって、柄部１０５の長さを変えたシャフト１０１が作られる。シャフト１０１の一端側である後端部１０３は、フライトと接続される。 Referring to FIG. 1, the tip portion 107, which is the other end side of the shaft 101, is connected to the barrel. The tip of the tip 107 is threaded (not shown) to connect to the barrel. The handle 105 is a portion that gives the shaft 101 a length. Since the flight path of the darts changes depending on the length of the handle 105, the shaft 101 having a different length of the handle 105 can be manufactured according to the user's request. The rear end 103, which is one end of the shaft 101, is connected to the flight.
　図２を参照して、シャフト１０１の一端側である後端部１０３を説明する。図２は、後端部１０３であるフライト接合部Ａの拡大図である。フライト接合部２０１は円柱形状をしている。 The rear end portion 103, which is one end side of the shaft 101, will be described with reference to FIG. FIG. 2 is an enlarged view of the flight joint portion A that is the rear end portion 103. The flight joint portion 201 has a cylindrical shape.
　フライト接合部２０１は、一端側からバレル接続部の他端側に続く、フライトガイド部２０３と、フライトガイド部２０３から他端側に続く、雄ねじを備えるシャフトねじ部２０５と、シャフトねじ部２０５から他端側へ続くフライトねじ収容部２０７と、を備える。 The flight joint portion 201 includes a flight guide portion 203 that continues from one end side to the other end side of the barrel connection portion, a shaft screw portion 205 that includes a male screw that continues from the flight guide portion 203 to the other end side, and a shaft screw portion 205. And a flight screw accommodating portion 207 continuing to the other end side.
　フライトガイド部２０３は、後述する円筒形状を有するフライトに挿入される。このため、フライトガイド部２０３は、フライトのねじを案内する。フライトガイド部２０３の径は、フライトの雌ねじの内径よりも小さい。また、フライトガイド部２０３は、フライトが回転する軸を定める。 The flight guide section 203 is inserted into a flight having a cylindrical shape described later. Therefore, the flight guide unit 203 guides the flight screw. The diameter of the flight guide portion 203 is smaller than the inner diameter of the internal thread of the flight. The flight guide unit 203 also defines the axis about which the flight rotates.
　シャフトねじ部２０５とフライトねじ収容部２０７がフライトのねじを案内することができるとき、フライトガイド部２０３は、設けられなくてもよい。 When the shaft screw portion 205 and the flight screw accommodating portion 207 can guide the flight screw, the flight guide portion 203 may not be provided.
　シャフトねじ部２０５は、円柱形状に形成された雄ねじである。フライトをシャフトのフライト接合部にはめ込んだ後、シャフトねじ部２０５は、フライトの円筒形状の内部の雌ねじとお互いに回ることで、シャフトとフライトの接合がなされる。 The shaft screw portion 205 is a male screw formed in a cylindrical shape. After the flight is fitted into the flight joint of the shaft, the shaft screw portion 205 rotates with the female thread inside the cylindrical shape of the flight, thereby joining the shaft and the flight.
　フライトねじ収容部２０７は、フライトの雌ねじを回転可能に収容する。これは、フライトねじ収容部２０７の軸線長さがフライトの雌ねじの軸線長さよりも長いためである。 The flight screw accommodating portion 207 rotatably accommodates a flight female screw. This is because the axial length of the flight screw housing portion 207 is longer than the axial length of the female screw of the flight.
　また、フライトねじ収容部２０７の径は、前記フライトの雌ねじの内径よりも小さい。すなわち、フライトねじ収容部２０７は、フライトの雌ねじが接触しない、またはねじ山のみ接触する空間になる。このようにすることで、フライトとシャフトを摩擦がほとんどなく接合できる。 The diameter of the flight screw accommodating portion 207 is smaller than the inner diameter of the female screw of the flight. That is, the flight screw accommodating portion 207 becomes a space where the female threads of the flight do not contact or only the threads are in contact. By doing so, the flight and the shaft can be joined with almost no friction.
　シャフトねじ部２０５のねじ山は、フライトの円筒形状の内部での接触を考慮して、寸法差ａを備える。末端側のねじ山の先を細くしていくことにより、フライトの円筒形状に入りやすくする。また、接合時に、シャフトとフライトの接触を少なくしてそこで生じる摩擦を軽減する。 The screw thread of the shaft thread portion 205 has a dimensional difference a in consideration of contact inside the cylindrical shape of the flight. By tapering the thread on the terminal side, it is easy to enter the cylindrical shape of the flight. Further, at the time of joining, the contact between the shaft and the flight is reduced to reduce the friction generated there.
　このように本発明のダーツ用シャフトを用いたダーツは、シャフトとフライトの接合に摩擦力を用いないため、回転のしやすさを向上させることができる。フライトねじ収容部の径は、フライトの雌ねじの内径よりも小さいことで、シャフトとフライトの接合の摩擦力を減らすことができる。 In this way, the darts using the darts shaft of the present invention do not use frictional force for joining the shaft and the flight, and thus can be easily rotated. The diameter of the flight screw accommodating portion is smaller than the inner diameter of the female screw of the flight, so that the frictional force at the joint between the shaft and the flight can be reduced.
　また、本発明のダーツ用シャフトの雄ねじの一端側は、円柱形状のフライトガイド部が続いている。フライトガイド部は、フライトを案内し、フライトが回転する軸を定める。また、フライトガイド部の円柱形状の大きさを調整することで、シャフトとフライトの接合の摩擦力を増加することが可能である。したがって、シャフトとフライトの固定の強さと回転のしやすさとのバランスを調整できる。 Also, a cylindrical flight guide section continues to one end side of the male screw of the dart shaft of the present invention. The flight guide unit guides the flight and defines an axis about which the flight rotates. Further, by adjusting the size of the columnar shape of the flight guide portion, it is possible to increase the frictional force at the joint between the shaft and the flight. Therefore, the balance between the fixing strength of the shaft and the flight and the ease of rotation can be adjusted.
（フライトの説明）
　図３は、本発明の１つの実施形態のフライトの概略図である。図４は、図３のフライトの矢視Ｂ－Ｂ図である。図５は、図３のフライトのＣ－Ｃ断面図である。図３乃至図５を参照して、本発明の１つの実施形態のフライトを説明する。 (Flight description)
FIG. 3 is a schematic diagram of a flight of one embodiment of the present invention. FIG. 4 is an arrow BB view of the flight of FIG. FIG. 5 is a sectional view taken along line CC of the flight shown in FIG. A flight of one embodiment of the present invention will be described with reference to FIGS.
　図３に示すように、フライト３０１は、シャフト接合部３０３を含み、シャフト接合部３０３と羽根３０５とが一体成形されている。矢視Ｂ－Ｂ図である図４を参照すると、フライト４０１は、４枚の羽根４０３、４０５、４０７、４０９が互いに直角をなして接続されている。 As shown in FIG. 3, the flight 301 includes a shaft joint portion 303, and the shaft joint portion 303 and the blade 305 are integrally molded. Referring to FIG. 4, which is a view taken along the line BB, in the flight 401, four blades 403, 405, 407, and 409 are connected at right angles to each other.
　シャフト接合部４１１は、この羽根４０３、４０５、４０７、４０９が接続する中心部にある。このような構成により、ダーツの飛行の安定性を得ることができる。 The shaft joint 411 is located at the center of the blades 403, 405, 407, 409. With such a configuration, it is possible to obtain stability of dart flight.
　図５を参照して、シャフト接合部５０１を説明する。シャフト接合部５０１は円筒形状である。シャフト接合部５０１は、雌ねじを備えるフライトねじ部５０３と、フライトねじ部から奥部に続くシャフトねじ収容部５０５と、シャフトねじ収容部５０５から奥部に続くフライトガイド部収容部５０７を備える。 The shaft joint 501 will be described with reference to FIG. The shaft joint 501 has a cylindrical shape. The shaft joint portion 501 includes a flight screw portion 503 having a female screw, a shaft screw accommodating portion 505 continuing from the flight screw portion to the inner portion, and a flight guide portion accommodating portion 507 continuing from the shaft screw accommodating portion 505 to the inner portion.
　シャフトとフライトとが接合されるとき、フライトねじ部５０３は、シャフトのフライトガイド部２０３に案内され、シャフトのシャフトねじ部２０５で互いにねじ回され、シャフトのフライトねじ収容部２０７に収容される。 When the shaft and the flight are joined, the flight screw part 503 is guided by the flight guide part 203 of the shaft, screwed together by the shaft screw part 205 of the shaft, and housed in the flight screw housing part 207 of the shaft.
　また、シャフトとフライトとが接合されるとき、シャフトねじ収容部５０５は、シャフトのシャフトねじ部２０５を収容する。さらにフライトガイド部収容部５０７は、シャフトのフライトガイド部２０３を収容する。フライトガイド部収容部５０７は、フライトガイド部２０３が設けられなければ、設けられなくてもよい。 Further, when the shaft and the flight are joined, the shaft screw accommodating portion 505 accommodates the shaft screw portion 205 of the shaft. Further, the flight guide portion accommodating portion 507 accommodates the flight guide portion 203 of the shaft. The flight guide portion accommodating portion 507 may not be provided if the flight guide portion 203 is not provided.
　（シャフトとフライトからなるダーツ用部材の接合の説明）
　図６は、本発明の１つの実施形態のシャフトとフライトからなるダーツ用部材を接合した図である。図７Ａは、本発明の１つの実施形態のフライト接合部の分解図である。図７Ｂは、本発明の１つの実施形態のシャフト接合部の分解図である。図７Ｃは、本発明の１つの実施形態のフライトとシャフトを接合している分解図である。図７Ｄは、本発明の１つの実施形態のシャフトとフライトを接合した接合部の断面拡大図である。図６及び図７Ａ乃至図７Ｄを用いて、本発明のシャフトとフライトからなるダーツ用部材の接合を説明する。 (Explanation of joining darts members consisting of shaft and flight)
FIG. 6 is a diagram in which a darts member including a shaft and a flight according to an embodiment of the present invention is joined. FIG. 7A is an exploded view of a flight joint of one embodiment of the present invention. FIG. 7B is an exploded view of the shaft joint of one embodiment of the present invention. FIG. 7C is an exploded view of joining the flight and shaft of one embodiment of the present invention. FIG. 7D is an enlarged cross-sectional view of the joint portion where the shaft and the flight portion of one embodiment of the present invention are joined. The joining of the darts member composed of the shaft and the flight according to the present invention will be described with reference to FIGS. 6 and 7A to 7D.
　図６は、シャフト６０１とフライト６０３からなるダーツ用部材を接合した図を示す。シャフト６０１とフライト６０３は右へも左へも回転可能に接合されている。 FIG. 6 shows a diagram in which a darts member composed of a shaft 601 and a flight 603 is joined. The shaft 601 and the flight 603 are rotatably joined to the right and left.
　シャフト６０１とフライト６０３との大きさを合わせることで、シャフト６０１とフライト６０３とは、緩みなく接合されることができる。その大きさは、図７Ａ、図７Ｂで後述する。 By matching the sizes of the shaft 601 and the flight 603, the shaft 601 and the flight 603 can be joined without looseness. The size will be described later with reference to FIGS. 7A and 7B.
　図７Ａ乃至７Ｄを参照して、シャフト７０１とフライト７０３とを接合した状態を説明する。図７Ａに示すようにシャフト７０１は、フライト接合部にフライトガイド部７０５、シャフトねじ部７０７、フライトねじ収容部７０９を備える。図７Ｂに示すように、フライト７０３は、シャフト接合部にフライトねじ部７１１、シャフトねじ収容部７１３、フライトガイド部収容部７１５を備える。 A state in which the shaft 701 and the flight 703 are joined will be described with reference to FIGS. 7A to 7D. As shown in FIG. 7A, the shaft 701 includes a flight guide portion 705, a shaft screw portion 707, and a flight screw accommodating portion 709 at the flight joint portion. As shown in FIG. 7B, the flight 703 includes a flight screw portion 711, a shaft screw accommodation portion 713, and a flight guide portion accommodation portion 715 at the shaft joint portion.
　図７Ｃに示すように、フライト７０３のシャフト接合部をシャフト７０１のフライト接合部にはめ込んだ後、シャフトねじ部７０７の雄ねじは、フライトねじ部７１１の雌ねじとお互いに回ることで、シャフトとフライトの接合がなされる。ここでは、ねじは右回転で締まり、左回転で外れる。 As shown in FIG. 7C, after the shaft joint portion of the flight 703 is fitted into the flight joint portion of the shaft 701, the male screw of the shaft screw portion 707 and the female screw of the flight screw portion 711 rotate with each other, so that Bonding is done. Here, the screw is tightened by rotating it to the right and released by rotating it to the left.
　図７Ｄに示すように、シャフトとフライトとが、完全に接合されたとき、それぞれ、フライトガイド部７０５は、フライトガイド部収容部７１５に収容され、シャフトねじ部７０７は、シャフトねじ収容部７１３に収容され、フライトねじ部７１１は、フライトねじ収容部７０９に収容される。 As shown in FIG. 7D, when the shaft and the flight are completely joined, the flight guide portion 705 is housed in the flight guide portion housing portion 715, and the shaft screw portion 707 is housed in the shaft screw housing portion 713. The flight screw portion 711 is accommodated in the flight screw accommodation portion 709.
　図７Ａ、７Ｂを参照して、フライトねじ部７１１の軸線長さＬ４は、フライトねじ収容部７０９の軸線長さＬ１より少し短い。一例として、Ｌ４は、Ｌ１の８０％～１００％、好ましくは９１％～９８％の間の長さである。例えば、Ｌ１を５．３３ｍｍとすると、Ｌ４は５．０３ｍｍである。 7A and 7B, the axial length L4 of the flight screw portion 711 is slightly shorter than the axial length L1 of the flight screw accommodating portion 709. As an example, L4 has a length of between 80% and 100%, preferably 91% and 98% of L1. For example, if L1 is 5.33 mm, L4 is 5.03 mm.
　また、シャフトねじ部７０７の軸線長さＬ２は、シャフトねじ収容部の軸線長さＬ５より少し短い。一例として、Ｌ２は、Ｌ５の８０％～１００％、好ましくは８６％～９６％の間の長さである。例えば、Ｌ５を３．８２ｍｍとすると、Ｌ２は、３．５０ｍｍである。 Also, the axial length L2 of the shaft screw portion 707 is slightly shorter than the axial length L5 of the shaft screw accommodating portion. As an example, L2 is between 80% and 100% of L5, preferably between 86% and 96%. For example, if L5 is 3.82 mm, L2 is 3.50 mm.
　シャフトとフライトとが、完全に接合されたとき、シャフトねじ部がシャフトねじ収容部に収容され、フライトねじ部がフライトねじ収容部に収容されることにより、ねじのかみ合わせは外れている。したがって、フライトが右に回転しても締まることはなく、フライトが左に回転しても外れることはない。 　When the shaft and flight are completely joined, the shaft screw part is housed in the shaft screw housing part, and the flight screw part is housed in the flight screw housing part, so that the screw engagement is disengaged. Therefore, when the flight rotates to the right, it does not tighten, and when the flight rotates to the left, it does not come off.
　フライトねじ収容部７０９の径ｄ１は、フライトねじ部７１１の内径ｄ４より小さい。すなわち、フライトねじ収容部７０９は、フライトの雌ねじが接触しない、またはねじ山の一部のみ接触する空間になる。一例として、ｄ１は、ｄ４の８０％～１００％、好ましくは８３％～９３％の間の長さである。例えば、ｄ４を３．３１ｍｍとすると、ｄ１は、２．９０ｍｍである。 The diameter d1 of the flight screw housing portion 709 is smaller than the inner diameter d4 of the flight screw portion 711. That is, the flight screw accommodating portion 709 becomes a space where the female screw of the flight does not contact or only a part of the screw thread contacts. As an example, d1 is between 80% and 100% of d4, preferably between 83% and 93% long. For example, if d4 is 3.31 mm, d1 is 2.90 mm.
　また、シャフトねじ収容部７１３の径ｄ５は、シャフトねじ部７０７の外径ｄ２より大きい。同様に、シャフトねじ収容部７１３は、シャフトの雄ねじが接触しない、またはねじ山の一部のみ接触する空間になる。一例として、ｄ５は、ｄ２の１００～１２０％、好ましくは１０８％～１１８％の間の長さである。例えば、ｄ２を３．８０ｍｍとすると、ｄ５は、４．３０ｍｍである。 Also, the diameter d5 of the shaft screw housing portion 713 is larger than the outer diameter d2 of the shaft screw portion 707. Similarly, the shaft screw accommodating portion 713 becomes a space where the male screw of the shaft does not contact or only a part of the screw thread contacts. As an example, d5 has a length of between 100 and 120% of d2, preferably between 108% and 118%. For example, if d2 is 3.80 mm, d5 is 4.30 mm.
　シャフト７０１とフライト７０３を回転可能に接合するには、それぞれの部位の接触による摩擦を調整する必要がある。フライトねじ収容部７０９とフライトねじ部７１１とはフライトねじ部７１１のねじ山でのみ接触され、シャフトねじ部７０７とシャフトねじ収容部７１３は、シャフトねじ部７０７のねじ山でのみ接触されるため、摩擦の寄与は小さい。 In order to rotatably join the shaft 701 and the flight 703, it is necessary to adjust the friction caused by the contact of each part. The flight screw accommodation portion 709 and the flight screw portion 711 are in contact with each other only by the screw thread of the flight screw portion 711, and the shaft screw portion 707 and the shaft screw accommodation portion 713 are contacted only by the screw thread of the shaft screw portion 707. The contribution of friction is small.
　したがって、フライトガイド部収容部７１５とフライトガイド部７０５の接触が一番大きな面接触となる。フライトガイド部収容部７１５は、フライトガイド部７０５が圧入されるようにフライトガイド部７０５に対し、少しだけ大きくするとで、シャフト７０１とフライト７０３との摩擦を増加できる。 Therefore, the contact between the flight guide housing 715 and the flight guide 705 is the largest surface contact. The flight guide part accommodating part 715 can increase the friction between the shaft 701 and the flight 703 by slightly increasing the size of the flight guide part 705 so that the flight guide part 705 is press-fitted.
　一例として、Ｌ６は、Ｌ３の１００％～１５０％、好ましくは１０５％～１１５％の間の長さである。例えば、Ｌ３を６．１７ｍｍとすると、Ｌ６は、６．７５ｍｍである。例えば、フライトねじ収容部の軸線長さＬ１とシャフトねじ部の軸線長さＬ２の和は、フライトねじ部の軸線長さＬ４とシャフトねじ収容部の軸線長さＬ５の和より、０．０２ｍｍ短いので、Ｌ３とＬ６が同じ程度の長さでもよい。 As an example, L6 has a length between 100% and 150% of L3, preferably between 105% and 115%. For example, if L3 is 6.17 mm, L6 is 6.75 mm. For example, the sum of the axial length L1 of the flight screw housing and the axial length L2 of the shaft screw portion is 0.02 mm shorter than the sum of the axial length L4 of the flight screw portion and the axial length L5 of the shaft screw housing. Therefore, L3 and L6 may have the same length.
　一例としてｄ６は、ｄ３の１００％～１２０％、好ましくは、１０２％～１１２％の間の長さである。例えば、ｄ３を２．９０ｍｍとすると、ｄ６は、３．１０ｍｍである。 As an example, d6 has a length between 100% and 120% of d3, preferably between 102% and 112%. For example, if d3 is 2.90 mm, d6 is 3.10 mm.
　本発明のダーツ用部材を用いたダーツは、シャフトとフライトの接合に摩擦力は関係しないため、回転のしやすさを向上させることができる。フライトねじ収容部の径は、前記フライトの雌ねじの内径よりも小さいことで、シャフトとフライトの接合の摩擦力を減らすことができる。 In the darts using the darts member of the present invention, the friction force is not involved in the joint between the shaft and the flight, and thus the ease of rotation can be improved. The diameter of the flight screw accommodating portion is smaller than the inner diameter of the female screw of the flight, so that the frictional force at the joint between the shaft and the flight can be reduced.
　フライトガイド部は、フライトガイド部収容部を案内し、フライトが回転する軸を定める。また、フライトガイド部の円柱形状の径を大きくすることで、シャフトとフライトの接合の摩擦力を増加することができる。さらに、フライトガイド部収容部の円筒形状の径を小さくすることで、シャフトとフライトの接合の摩擦力を増加することができる。したがって、シャフトとフライトの固定の強さと回転のしやすさとのバランスを調整できる。 The flight guide section guides the flight guide accommodation section and defines the axis about which the flight rotates. Further, by increasing the diameter of the columnar shape of the flight guide portion, it is possible to increase the frictional force of joining the shaft and the flight. Further, by reducing the diameter of the cylindrical shape of the flight guide accommodating portion, it is possible to increase the frictional force at the joint between the shaft and the flight. Therefore, the balance between the fixing strength of the shaft and the flight and the ease of rotation can be adjusted.
　シャフトとフライトの接合に摩擦力を用いないため、回転のしやすさを向上させることができる。本発明のダーツ用シャフトまたはダーツ用部材を用いたダーツは、ダーツとフライトの固定の強さと回転のしやすさのバランスを調整できる。そのため、壊れにくく、競技しやすいダーツが提供される。 　Since no frictional force is used to join the shaft and flight, the ease of rotation can be improved. The darts using the dart shaft or the dart member of the present invention can adjust the balance between the fixing strength of the dart and the flight and the easiness of rotation. Therefore, darts that are hard to break and easy to play are provided.
　本発明は、ダーツに適用できる。 The present invention can be applied to darts.
　１０１　シャフト
　１０３　後端部
　１０５　柄部
　１０７　先端部
　２０１　フライト接合部
　２０３　フライトガイド部
　２０５　シャフトねじ部
　２０７　フライトねじ収容部
　３０１　フライト
　３０３　シャフト接合部
　３０５　羽根
　４０１　フライト
　４０３、４０５、４０７、４０９　羽根
　４１１　シャフト接合部
　５０１　シャフト接合部
　５０３　フライトねじ部
　５０５　シャフトねじ収容部
　５０７　フライトガイド部収容部
　６０１　シャフト
　６０３　フライト
　７０１　シャフト
　７０３　フライト
　７０５　フライトガイド部
　７０７　シャフトねじ部
　７０９　フライトねじ収容部
　７１１　フライトねじ部
　７１３　シャフトねじ収容部
　７１５　フライトガイド部収容部
　８０１　ダーツ
　８０３　ティップ
　８０５　バレル
　８０７　シャフト
　８０９　フライト 101 Shaft 103 Rear End 105 Handle 107 Front Tip 201 Flight Joint 203 Flight Guide 205 205 Screw Thread 207 Flight Screw Housing 301 Flight 303 Shaft Joint 305 Blade 401 Flight 403, 405, 407, 409 Blade 411 Shaft Joint Part 501 Shaft joint part 503 Flight screw part 505 Shaft screw accommodating part 507 Flight guide part accommodating part 601 Shaft 603 Flight 701 Shaft 703 Flight 705 Flight guide part 707 Shaft screw part 709 Flight screw accommodating part 711 Flight screw part 713 Shaft screw accommodating part 715 Flight guide section accommodation section 801 Darts 803 Tip 805 Barrel 807 Shaft 809 Flight

Claims (7)

  1. 　一端側からバレル接続部の他端側に続く雄ねじを備えるシャフトねじ部と、前記シャフトねじ部から他端側へ続くフライトねじ収容部と、を備える円柱形状のフライト接合部で、円筒形状の端部に雌ねじを備えるフライトと接合するダーツ用シャフトであって、
    　前記フライトを前記ダーツ用シャフトにはめ込み、前記シャフトねじ部の前記雄ねじと前記フライトねじ部の前記雌ねじとを回すことで、前記フライトと前記ダーツ用シャフトが接合され、
    　前記フライトねじ収容部の軸線長さが前記雌ねじよりの軸線長さよりも長いことで、前記フライトは、前記ダーツ用シャフトと回転可能に接合される、ダーツ用シャフト。     A cylindrical flight joint including a shaft screw portion having a male screw continuing from one end side to the other end side of the barrel connecting portion and a flight screw accommodating portion continuing from the shaft screw portion to the other end side, and having a cylindrical end. A shaft for darts that is joined to a flight that has a female screw on its section,
    By fitting the flight into the darts shaft and rotating the male screw of the shaft screw part and the female screw of the flight screw part, the flight and the darts shaft are joined,
    The shaft for darts in which the flight is rotatably joined to the shaft for darts when the axial length of the flight screw accommodating portion is longer than the axial length of the female screw.
  2. 　前記フライトねじ収容部の径は、前記フライトの雌ねじの内径よりも小さい、請求項１に記載のダーツ用シャフト。 The shaft for darts according to claim 1, wherein the diameter of the flight screw accommodating portion is smaller than the inner diameter of the female screw of the flight.
  3. 　前記ダーツ用シャフトの雄ねじの一端側は、円柱形状のフライトガイド部が続いている、請求項１または２に記載のダーツ用シャフト。 The shaft for darts according to claim 1 or 2, wherein one end side of the male screw of the shaft for darts is followed by a columnar flight guide portion.
  4. 　一端側からバレル接続部の他端側に続く雄ねじを備えるシャフトねじ部と、前記シャフトねじ部から他端側に続くフライトねじ収容部と、を備える円柱形状のフライト接合部を有するダーツ用シャフトと、
    　雌ねじを備えるフライトねじ部と、前記フライトねじ部から奥部に続くシャフトねじ収容部と、を備える円筒形状のシャフト接合部を含むフライトと、
    　を備えるダーツ用部材であって、
    　前記シャフト接合部を前記フライト接合部にはめ込み、前記シャフトねじ部の前記雄ねじと前記フライトねじ部の前記雌ねじとを回すことで、前記フライトが前記ダーツ用シャフトに接合され、
    　前記フライトねじ収容部の軸線長さが前記雌ねじの軸線長さよりも長いことで、前記フライトは、前記ダーツ用シャフトと回転可能に接合される、ダーツ用部材。     A shaft for darts having a columnar flight joint including a shaft screw portion including a male screw continuing from one end side to the other end side of the barrel connecting portion, and a flight screw accommodating portion continuing from the shaft screw portion to the other end side. ,
    A flight including a cylindrical shaft joint portion including a flight screw portion including a female screw, and a shaft screw accommodating portion continuing from the flight screw portion to the inner portion,
    A member for darts comprising:
    By fitting the shaft joint portion into the flight joint portion and rotating the male screw of the shaft screw portion and the female screw of the flight screw portion, the flight is joined to the darts shaft,
    The darts member in which the flight is rotatably joined to the darts shaft by the axial length of the flight screw accommodating portion being longer than the axial length of the female screw.
  5. 　前記フライトねじ収容部の径は、前記フライトの雌ねじの内径よりも小さい、請求項４に記載のダーツ用部材。 The darts member according to claim 4, wherein the diameter of the flight screw housing is smaller than the inner diameter of the female screw of the flight.
  6. 　前記ダーツ用シャフトの雄ねじの一端側は、円柱形状のフライトガイド部が続いており、前記フライトの前記シャフトねじ収容部の奥部に円筒形状のフライトガイド部収容部が続いている、請求項４または５に記載のダーツ用部材。 The columnar flight guide part continues to one end side of the male screw of the darts shaft, and the cylindrical flight guide part accommodating part follows to the inner part of the shaft screw accommodating part of the flight. Or the member for darts described in 5.
  7. 　請求項１乃至３のいずれか１項に記載のダーツ用シャフト、または請求項４乃至６のいずれか１項に記載のダーツ用部材を備えるダーツ。 A shaft for darts according to any one of claims 1 to 3, or a darts provided with the member for darts according to any one of claims 4 to 6.
PCT/JP2018/046133 2018-12-14 2018-12-14 Dart shaft, dart member, and dart WO2020121522A1 (en)

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PCT/JP2018/046133 WO2020121522A1 (en) 2018-12-14 2018-12-14 Dart shaft, dart member, and dart
JP2019559376A JP6751931B1 (en) 2018-12-14 2018-12-14 Shafts for darts, members for darts, and darts

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4978130A (en) * 1986-05-29 1990-12-18 Farler Charles W Dart flight rotation shaft and flight rotation shaft assembly
US5573251A (en) * 1994-05-04 1996-11-12 Target Sports Limited Dart flight stem
JP4350154B1 (en) * 2008-09-10 2009-10-21 株式会社コスモ精機 Darts
JP2011110413A (en) * 2009-11-26 2011-06-09 Chuyo Seiko Co Ltd Dart
JP5475911B1 (en) * 2013-06-12 2014-04-16 株式会社ハマダ工商 Flight units and darts
US20160231092A1 (en) * 2015-02-06 2016-08-11 Hamada Kousyou Co., Ltd. Flight unit and dart

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4978130A (en) * 1986-05-29 1990-12-18 Farler Charles W Dart flight rotation shaft and flight rotation shaft assembly
US5573251A (en) * 1994-05-04 1996-11-12 Target Sports Limited Dart flight stem
JP4350154B1 (en) * 2008-09-10 2009-10-21 株式会社コスモ精機 Darts
JP2011110413A (en) * 2009-11-26 2011-06-09 Chuyo Seiko Co Ltd Dart
JP5475911B1 (en) * 2013-06-12 2014-04-16 株式会社ハマダ工商 Flight units and darts
US20160231092A1 (en) * 2015-02-06 2016-08-11 Hamada Kousyou Co., Ltd. Flight unit and dart

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