JP4563368B2

JP4563368B2 - Darts

Info

Publication number: JP4563368B2
Application number: JP2006334611A
Authority: JP
Inventors: 大介浅野
Original assignee: 大介浅野
Priority date: 2006-12-12
Filing date: 2006-12-12
Publication date: 2010-10-13
Anticipated expiration: 2026-12-12
Also published as: JP2008142399A

Description

本発明は、壁などに用意された的（ダーツボード）に矢を当てて得点を競うダーツの改良に関するものである。 The present invention relates to an improvement of a dart that competes for a score by applying an arrow to a target (dart board) prepared on a wall or the like.

ダーツは、バレルと、バレルの先端部に取り付けられるチップと、バネルの後端部に取り付けられるシャフトと、シャフトに取り付けられるフライトとから構成される。これらのダーツ構成部材のうちバレルは、いわゆるダーツの本体で、プレーヤーがダーツを投げる際に手に持つ部分であり、この部分の掴み易さと共に、その重量及び重心位置によって結果が左右されることから、バレルはダーツにおいて非常に重要な役割を果たしている。特にダーツゲームでは、ダーツの重量及び重心位置を変えることによって、プレーヤーは様々なプレースタイルを実現して、より高い得点を上げることができるとされている。 The dart is composed of a barrel, a tip attached to the tip of the barrel, a shaft attached to the rear end of the bunnel, and a flight attached to the shaft. Among these dart components, the barrel is the so-called dart body, which is the part that the player holds in throwing the dart, and the result depends on the weight and center of gravity position, as well as the ease of grasping this part. So barrels play a very important role in darts. Particularly in the dart game, it is said that by changing the weight of the dart and the position of the center of gravity, the player can realize various play styles and raise a higher score.

従来のダーツとして、特許公報等の公知文献を具体的な上げることはできないが、従来使用されているダーツでは、バレル自体の重量及び重心位置が固定されているため、プレーヤーは、プレースタイルに応じて、夫々重量及び重心位置の種々異なった多数のバレルを用意する必要があった。 Known darts such as patent gazettes cannot be specifically raised as conventional darts. However, in conventional darts, the weight and center of gravity of the barrel itself are fixed. Therefore, it is necessary to prepare a large number of barrels having different weights and positions of the center of gravity.

本発明は、バレルの重量及び重心位置を自由に変更できるようにしたダーツを提供することを目的とする。 An object of this invention is to provide the dart which enabled it to change freely the weight of a barrel, and a gravity center position.

上記課題を解決するための手段を、後述する実施形態の参照符号を付して説明すると、本発明の請求項１に係る発明は、バレル１と、バレル１の先端部に取り付けられるチップ２と、バレル１の後端部に取り付けられるシャフト３と、シャフト３に取り付けられるフライト４とからなるダーツにおいて、
バレル１内部には軸方向中央部の隔壁１ｏを挟んでその前後両側にバレル１の両端に開口するネジ孔８，９をその開口端から隔壁１ｏに至るまで形成し、チップ２の後端部にはバレル１の前部側ネジ孔８に螺合する取付用ネジ部１１を、シャフト３の先端部には後部側ネジ孔９に螺合する取付用ネジ部１２を夫々形成する一方、バレル１の各ネジ孔８，９に螺入可能で、夫々同じ金属材で形成されて長さの異なることによって重量の異なる複数種類の錘片５，６，７を設け、これら錘片５，６，７を選択的にバレル１の前部側ネジ孔８及び後部側ネジ孔９に前記隔壁１ｏに当たるまで螺入することによって、バレル１の重量及び重心位置を変えるようにしたことを特徴とする。 Means for solving the above problems will be described with reference numerals of the embodiments described later. The invention according to claim 1 of the present invention includes a barrel 1 and a chip 2 attached to the tip of the barrel 1. In a dart consisting of a shaft 3 attached to the rear end of the barrel 1 and a flight 4 attached to the shaft 3,
Inside the barrel 1, screw holes 8 and 9 are formed on both front and rear sides of the partition wall 1 o at the center in the axial direction from the opening end to the partition wall 1 o. Is formed with a mounting screw portion 11 that is screwed into the front screw hole 8 of the barrel 1, and a mounting screw portion 12 that is screwed into the rear screw hole 9 is formed at the tip of the shaft 3, respectively. A plurality of types of weight pieces 5, 6, 7, which can be screwed into the respective screw holes 8, 9, are formed of the same metal material and have different lengths due to different lengths , are provided. , 7 are selectively screwed into the front-side screw hole 8 and the rear-side screw hole 9 of the barrel 1 until they hit the partition wall 1o, thereby changing the weight and the position of the center of gravity of the barrel 1. .

尚、ダーツは、使用するダーツの矢先、的によってハードダーツとソフトダーツに分けられており、ハードダーツは、ブリッスルボードと呼ばれる麻でできた的に対し、金属製のチップを付けた矢（ダーツ）を投げるものであり、またソフトダーツは、プラスチック製の穴の開いた的に対し、プラスチック製のチップを付けた矢を投げるものであるが、この発明に係るダーツは、ハードダーツ及びソフトダーツの何れにも適用可能である。 The darts are divided into hard darts and soft darts depending on the tip of the darts used, and the hard darts are arrows made of hemp called bristle boards with arrows with metal tips (darts). The soft dart is for throwing an arrow with a plastic tip against the target with a plastic hole. The dart according to the present invention is a hard dart and a soft dart. It is applicable to any of these.

上記解決手段による発明の効果を、後述する実施形態の参照符号を付して説明すると、請求項１に係る発明によれば、バレル１内部には軸方向中央部の隔壁１ｏを挟んで前後両側にバレル１の両端に開口するネジ孔８，９をその開口端から隔壁１ｏに至るまで形成し、チップ２の後端部にはバレル１の前部側ネジ孔８に螺合する取付用ネジ部１１を、シャフト３の先端部には後部側ネジ孔９に螺合する取付用ネジ部１２を夫々形成する一方、バレル１の各ネジ孔８，９に螺入可能で、夫々同じ金属材で形成されて長さの異なることによって重量の異なる複数種類の錘片５，６，７を設けてなるもので、複数種類の錘片５，６，７を選択的にバレル１の前部側ネジ孔８及び後部側ネジ孔９に前記隔壁１ｏに当たるまで螺入することによって、バレル１の重量及び重心位置を変えるようにするから、プレーヤーは、１つのダーツだけで、様々なプレースタイルを実現して、より高い得点を上げることができる。 The effect of the invention by the above-described solution means will be described with reference numerals of embodiments to be described later. According to the invention according to claim 1, both the front and rear sides are sandwiched inside the barrel 1 with the partition wall 1o in the axial center. Screw holes 8 and 9 are formed at both ends of the barrel 1 from the opening end to the partition wall 1o, and a mounting screw that is screwed into the front screw hole 8 of the barrel 1 at the rear end of the chip 2. the parts 11, the distal end portion of the shaft 3 while the rear side respectively form a mounting screw portion 12 screwed into the threaded hole 9, screwed possible for the screw holes 8,9 of the barrel 1, respectively the same metal material Are provided with a plurality of types of weight pieces 5, 6, 7 having different lengths and having different lengths , and the plurality of types of weight pieces 5, 6, 7 are selectively provided on the front side of the barrel 1. by screwing until it hits the partition wall 1o the screw holes 8 and the rear side screw holes 9, Ba Since to alter the weight and center of gravity of Le 1, player only one dart, to achieve a variety of play styles may increase the higher score.

またこの発明にあっては、バレル１内部に軸方向中央部の隔壁１ｏを設けているから、錘片５，６，７をバレル１の端部からねじ込んで取り付ける際に各錘片５，６，７の先端部を隔壁１ｏに当てることによって、取付位置を固定できると共に、重心位置の変更を容易に確認することができる。 Further, according to the present invention, since the partition wall 1o at the axial center is provided inside the barrel 1, each of the weight pieces 5, 6 when the weight pieces 5, 6, 7 are screwed from the end of the barrel 1 and attached. , 7 can be attached to the partition wall 1o to fix the mounting position and to easily check the change of the center of gravity position.

又、本発明によれば、複数種類の錘片５，６，７を、夫々同じ金属材で長さが異なるように形成するため、製造が容易でコストを安くできる。 In addition, according to the present invention , the plurality of types of weight pieces 5, 6, and 7 are formed of the same metal material so as to have different lengths, so that the manufacture is easy and the cost can be reduced.

以下に本発明の好適な実施形態を図面にもとづいて説明すると、図１は本発明に係るダーツの一部断面拡大側面図、図２の(a) は図１に示すダーツの分解図、(b) 〜(c) は複数種類の錘片を示す夫々側面図、(e) は錘片の基端面を示す端面図、(f) は錘片の縦断面図であり、図３は本発明のダーツの種々の使用例を示す一部断面側面図である。このダーツは、いわゆるソフトダーツからなるもので、バレル１と、このバレル１の先端部に取り付けられるチップ２と、バレル１の後端部に取り付けられるシャフト３と、このシャフト３に取り付けられるフライト４と、バレル１内に螺入される３種類の錘片５，６，７とによって構成される。 A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially sectional enlarged side view of a dart according to the present invention, FIG. 2 (a) is an exploded view of the dart shown in FIG. b) to (c) are side views showing a plurality of types of weight pieces, (e) is an end view showing the base end face of the weight piece, (f) is a longitudinal sectional view of the weight piece, and FIG. It is a partial cross section side view which shows the various usage example of darts. This dart consists of a so-called soft dart, a barrel 1, a tip 2 attached to the tip of the barrel 1, a shaft 3 attached to the rear end of the barrel 1, and a flight 4 attached to the shaft 3. And three types of weight pieces 5, 6 and 7 screwed into the barrel 1.

上記ダーツの構造について図２を参照して更に詳しく説明すると、バレル１は、ニッケルやタングステン等の金属によって形成されたもので、バレル１の内部には、軸方向中央部に設けられた隔壁１ｏを挟んでその前後両側にバレル１の両端に開口するネジ孔８，９がその開口端から隔壁１ｏに至る全域に形成され、このバレル１の外周面には滑り止め用の刻み１０が形成されている。このバレル１の重さは１６〜２０ｇとされる。 The structure of the dart will be described in more detail with reference to FIG. 2. The barrel 1 is made of a metal such as nickel or tungsten, and a partition wall 1o provided in the central portion in the axial direction is formed inside the barrel 1. Screw holes 8 and 9 are formed on both the front and rear sides of the barrel 1 on both sides of the barrel 1 over the entire area from the opening end to the partition wall 1o, and an anti-slip notch 10 is formed on the outer peripheral surface of the barrel 1. ing. The barrel 1 has a weight of 16 to 20 g.

チップ２はプラスチックによって形成されたもので、このチップ２の後端部には、バレル１の前部側ネジ孔８の先端部に螺合される取付用ネジ部１１が形成されている。シャフト３もプラスチックによって形成されたもので、シャフト３の先端部にはバレル１の後部側ネジ孔９の後端部に螺合される取付用ネジ部１２が形成され、シャフト３の後部側にはフライト４を取り付けるための断面十字形の差込溝１３が形成されている。フライト４は、プラスチック製の４枚の羽根４ａからなるもので、シャフト３の差込溝１３に差し込んで取り付けられるようになっている。 The chip 2 is made of plastic, and a mounting screw portion 11 is formed at the rear end portion of the chip 2 so as to be screwed into the front end portion of the front screw hole 8 of the barrel 1. The shaft 3 is also made of plastic, and a mounting screw portion 12 that is screwed into the rear end portion of the rear side screw hole 9 of the barrel 1 is formed at the front end portion of the shaft 3. Has a cross-shaped insertion groove 13 for mounting the flight 4. The flight 4 is composed of four plastic blades 4 a and is inserted into the insertion groove 13 of the shaft 3 to be attached.

図２の(b)、 (c) 及び(d)は、バレル１の各ネジ孔８，９に螺入可能で、重量の異なる３種類の錘片５，６，７を示したもので、これらの錘片５，６，７を選択的にバレル１の前部側ネジ孔８及び後部側ネジ孔９に螺入することにより、バレル１の重量及び重心位置を変えることができるようになっている。 (B), (c) and (d) of FIG. 2 show three kinds of weight pieces 5, 6, 7 which can be screwed into the respective screw holes 8, 9 of the barrel 1 and have different weights. By selectively screwing these weight pieces 5, 6, 7 into the front side screw hole 8 and the rear side screw hole 9 of the barrel 1, the weight and the center of gravity of the barrel 1 can be changed. ing.

これらの錘片５，６，７は、バレル１と同じニッケルやタングステン等の金属によって形成されている。これら錘片５，６，７は、夫々同じ金属材で長さが異なるように形成されたもので、錘片５が０．４ｇ、錘片６が０．６ｇ、錘片７が０．８ｇで、長さに比例した重さとなっており、錘片５を小の錘片、錘片６を中の錘、錘片７を大の錘とする。 These weight pieces 5, 6 and 7 are formed of the same metal as the barrel 1, such as nickel or tungsten. These weight pieces 5, 6 and 7 are made of the same metal material and have different lengths. The weight piece 5 is 0.4 g, the weight piece 6 is 0.6 g, and the weight piece 7 is 0.8 g. Thus, the weight is proportional to the length. The weight piece 5 is a small weight piece, the weight piece 6 is a middle weight, and the weight piece 7 is a large weight.

図１に示すダーツでは、バレル１の前部側ネジ孔８に小の錘５を隔壁１ｏに当たるまで螺入し、後部側ネジ孔９に大の錘７を隔壁１ｏに当たるまで螺入した使用状態を示す。尚、錘片５，６，７をバレル１のネジ孔８，９に螺入する場合は、各錘片５，６，７の基端面に設けてある例えばプラス形の溝１４にドライバー（ネジ回し）を係合して、ネジ孔８，９の奥までねじ込むようにする。 In the dart shown in FIG. 1, the small weight 5 is screwed into the front screw hole 8 of the barrel 1 until it hits the partition wall 1o, and the large weight 7 is screwed into the rear screw hole 9 until it hits the partition wall 1o. Indicates. When the weight pieces 5, 6, 7 are screwed into the screw holes 8, 9 of the barrel 1, a screwdriver (screw) is inserted into, for example, the plus-shaped groove 14 provided on the base end face of each weight piece 5, 6, 7. The screw holes 8 and 9 are screwed in.

図３の(a) 〜(p)には、上記３種類の錘片５，６，７を選択的にバレル１の前部側ネジ孔８及び後部側ネジ孔９に螺入して取り付けることにより、バレル１の重量及び重心位置を変えた種々多様なダーツを示している。尚、この図３の(a)〜(p)のダーツは、フライト４を取り外した状態とする。 3 (a) to 3 (p), the three kinds of weight pieces 5, 6, and 7 are selectively screwed into the front side screw hole 8 and the rear side screw hole 9 of the barrel 1 for attachment. Shows various darts in which the weight of the barrel 1 and the position of the center of gravity are changed. The darts (a) to (p) in FIG.

先ず(a) に示すダーツは、バレル１のネジ孔８，９に何の錘片５，６，７も取り付けていない場合を示す。(b)〜(d) に示すダーツは、後部側ネジ孔９のみに何れかの錘片５，６，７を取り付けた場合で、(b)のダーツは、後部側ネジ孔９に小の錘５を螺入して取り付けた場合を示している。(a)と(b)とを比較すると、(b)のダーツは小の錘５を取り付けた分（０．４ｇ）だけ(a) よりも重くなり、重心は(a) よりもほんの僅かに後側へ移動した状態となる。(c) に示すダーツは、後部側ネジ孔９に中の錘６（０．６ｇ）を螺入して取り付けた場合を示し、これを(b) と比較すると、(b)のダーツよりも僅かに重くなり、重心は(a)よりもごく僅かだけ後側へ移動した状態となる。(d) に示すダーツは、後部側ネジ孔９に大の錘７（０．６ｇ）を取り付けた場合を示したもので、これを(c) と比較すると、(c) のダーツより僅かに重くなり、重心は(c) よりごく僅かだけ後側へ移動した状態となる。 First, the dart shown in (a) shows a case where no weight pieces 5, 6 and 7 are attached to the screw holes 8 and 9 of the barrel 1. The darts shown in (b) to (d) are cases where any of the weight pieces 5, 6, 7 are attached only to the rear side screw hole 9. The case where the weight 5 is screwed and attached is shown. Comparing (a) and (b), the dart in (b) is heavier than (a) by the amount of the small weight 5 (0.4 g), and the center of gravity is only slightly more than in (a). It moves to the rear side. The dart shown in (c) shows the case where the inner weight 6 (0.6 g) is screwed into the rear screw hole 9 and compared with (b). It becomes slightly heavier, and the center of gravity moves to the rear side only slightly from (a). The dart shown in (d) shows a case where a large weight 7 (0.6 g) is attached to the rear screw hole 9, and when compared with (c), the dart is slightly more than the dart in (c). It becomes heavier and the center of gravity moves to the rear side only slightly from (c).

(e) 〜(g) に示すダーツは、前部側ネジ孔８のみに何れかの錘片５，６，７を取り付けた場合であり、(e)のダーツは、前部側ネジ孔８に小の錘５を取り付けた場合を示す。(e)と(a)とを比較すると、(e) のダーツは小の錘５を取り付けた分（０．４ｇ）だけ(a)より重く、重心は(a) よりほんの僅かに前側へ移動した状態となる。(f) のダーツは、前部側ネジ孔８に中の錘６を取り付けた場合を示し、(g) のダーツは、前部側ネジ孔８に大の錘７を取り付けた場合を示す。尚、(b)と(e) のダーツ、(c) と(f)のダーツ、及び(d)と(g)のダーツは、重心位置は夫々異なるが、重さは同じである。 The darts shown in (e) to (g) are cases where any of the weight pieces 5, 6, 7 are attached only to the front side screw hole 8, and the dart shown in (e) is the front side screw hole 8. The case where the small weight 5 is attached to is shown. Comparing (e) and (a), the dart in (e) is heavier than (a) by the amount of the small weight 5 attached (0.4 g), and the center of gravity moves slightly forward from (a). It will be in the state. The dart of (f) shows the case where the inner weight 6 is attached to the front screw hole 8, and the dart of (g) shows the case where the large weight 7 is attached to the front screw hole 8. The darts of (b) and (e), the darts of (c) and (f), and the darts of (d) and (g) are different in weight, but have the same weight.

(h) 〜(j) に示すダーツは何れも前部側ネジ孔８に小の錘５を取り付けた場合であり、(h)のダーツは後部側ネジ孔９の小の錘５を取り付け、(i)のダーツは後部側ネジ孔９の中の錘６を取り付け、(j) のダーツは後部側ネジ孔９の大の錘７を取り付けた場合を示し、重さは(h)、(i)、(j) の順に少しずつ重くなり、重心は(h)、(i)、(j) の順に少しずつ後側へ移動する。 Each of the darts shown in (h) to (j) is a case where a small weight 5 is attached to the front screw hole 8, and the dart shown in (h) is a small weight 5 attached to the rear screw hole 9. The dart of (i) is attached with the weight 6 in the rear screw hole 9, the dart of (j) shows the case where the large weight 7 of the rear screw hole 9 is attached, and the weight is (h), ( i) and (j) become heavier little by little in the order, and the center of gravity moves to the rear side little by little in the order of (h), (i), and (j).

(k) 〜(m) に示すダーツは何れも前部側ネジ孔８に中の錘６を取り付けた場合であり、(k)のダーツは後部側ネジ孔９の小の錘５を取り付け、(l)のダーツは後部側ネジ孔９の中の錘６を取り付け、(m) のダーツは後部側ネジ孔９の大の錘７を取り付けた場合を示し、重さは(k)、(l)、(m) の順に少しずつ重くなり、重心は(k)、(l)、(m) の順に少しずつ後側へ移動する。 Each of the darts shown in (k) to (m) is a case where the inner weight 6 is attached to the front screw hole 8, and the dart of (k) is attached to the small weight 5 of the rear screw hole 9, The dart of (l) shows the case where the weight 6 in the rear screw hole 9 is attached, and the dart of (m) shows the case where the large weight 7 of the rear screw hole 9 is attached, and the weight is (k), ( l) It becomes heavier little by little in the order of (m), and the center of gravity moves little by little in the order of (k), (l), (m).

(n) 〜(p) に示すダーツは何れも前部側ネジ孔８に大の錘７を取り付けた場合であり、(n)のダーツは後部側ネジ孔９の小の錘５を取り付け、(o)のダーツは後部側ネジ孔９の中の錘６を取り付け、(p) のダーツは後部側ネジ孔９の大の錘７を取り付けた場合を示し、重さは(n)、(o)、(p) の順に少しずつ重くなり、重心は(n)、(o)、(p) の順に少しずつ後側へ移動することになる。 Each of the darts shown in (n) to (p) is a case where a large weight 7 is attached to the front screw hole 8, and the dart shown in (n) is a small weight 5 of the rear screw hole 9, The dart of (o) shows the case where the weight 6 in the rear screw hole 9 is attached, and the dart of (p) shows the case where the large weight 7 of the rear screw hole 9 is attached, and the weight is (n), ( It becomes heavier in the order of o) and (p), and the center of gravity moves to the rear side in order of (n), (o) and (p).

以上説明したように、本発明のダーツによれば、バレル１内部には軸方向中央部の隔壁１ｏを挟んで前後両側にバレル１の両端に開口するネジ孔８，９を形成し、チップ２の後端部にはバレル１の前部側ネジ孔８に螺合する取付用ネジ部１１を、シャフト３の先端部には後部側ネジ孔９に螺合する取付用ネジ部１２を夫々形成する一方、バレル１の各ネジ孔８，９に螺入可能で重量の異なる複数種類の錘片５，６，７を設けてなるもので、複数種類の錘片５，６，７を選択的にバレル１の前部側ネジ孔８及び後部側ネジ孔９に螺入することによって、バレル１の重量及び重心位置を変えるようにしたから、プレーヤーは、多数のダーツを用意する必要がなく、１つのダーツだけで、様々なプレースタイルを実現して、より高い得点を上げることができる。 As described above, according to the dart of the present invention, the screw holes 8 and 9 that open at both ends of the barrel 1 are formed in the front and rear sides of the barrel 1 with the partition wall 1o in the center in the axial direction interposed therebetween, and the chip 2 A mounting screw portion 11 that is screwed into the front screw hole 8 of the barrel 1 is formed at the rear end portion, and a mounting screw portion 12 that is screwed into the rear screw hole 9 is formed at the tip portion of the shaft 3. On the other hand, a plurality of types of weight pieces 5, 6, and 7 that can be screwed into the screw holes 8 and 9 of the barrel 1 and have different weights are provided. Since the weight and the position of the center of gravity of the barrel 1 are changed by screwing into the front side screw hole 8 and the rear side screw hole 9 of the barrel 1, the player does not need to prepare a large number of darts. Realize various play styles with just one dart and increase your score Can.

また、バレル１内部には軸方向中央部の隔壁１ｏを設けているから、錘片５，６，７をバレル１の端部からねじ込んで取り付ける際に各錘片５，６，７の先端部を隔壁１ｏに当てることによって取付位置を固定できると共に、重心位置の変更を容易に確認できる。 Further, since the partition wall 1o at the center in the axial direction is provided inside the barrel 1, when the weight pieces 5, 6, 7 are screwed from the end of the barrel 1 and attached, the tip portions of the weight pieces 5, 6, 7 are attached. Can be fixed to the partition wall 1o, and the change of the center of gravity can be easily confirmed.

この実施形態では、３種類の錘片５，６，７を設けたが、錘片は重量の異なる２種類のものでもよいし、３種類以上のものでもよい。また、この実施形態では、複数種類の錘片５，６，７を、夫々同じ金属材で長さが異なるように形成するため、製造が容易でコストを安くできる。 In this embodiment, three kinds of weight pieces 5, 6, and 7 are provided, but the weight pieces may be two kinds having different weights, or may be three kinds or more. Further, in this embodiment , the plurality of types of weight pieces 5, 6, and 7 are formed of the same metal material so as to have different lengths, so that the manufacture is easy and the cost can be reduced.

また、この実施形態は、プラスチック製の穴の開いた的（ダーツボード）にプラスチック製のチップを投げるようにするソフトダーツについて説明したが、本発明に係るダーツは、ブリッスルボードと呼ばれる麻でできた的に金属製のチップを矢を投げるようにするハードダーツも適用可能である。 Moreover, although this embodiment demonstrated the soft dart which throws a plastic chip | tip at the target (dart board) with a plastic hole, the dart based on this invention can be made of hemp called a bristle board. A hard dart that allows a metal chip to throw an arrow is also applicable.

本発明に係るダーツの一部断面拡大側面図である。It is a partial cross section enlarged side view of the dart concerning the present invention. (a) は図１に示すダーツの分解図、(b) 〜(c) は複数種類の錘片を示す夫々側面図、(e) は錘片の基端面を示す端面図、(f) は錘片の縦断面図である。(a) is an exploded view of the dart shown in FIG. 1, (b) to (c) are side views showing a plurality of types of weight pieces, (e) is an end view showing the base end face of the weight pieces, and (f) is It is a longitudinal cross-sectional view of a weight piece. 本発明のダーツの種々の使用例を示す一部断面側面図である。It is a partial cross section side view which shows the various usage examples of the dart of this invention.

Explanation of symbols

１バレル
１ｏ隔壁
２チップ
３シャフト
４フライト
５，６，７錘片
８前部側ネジ孔
９後部側ネジ孔 1 Barrel 1o Bulkhead 2 Tip 3 Shaft 4 Flight 5, 6, 7 Weight piece 8 Front screw hole 9 Rear screw hole

Claims

In a dart consisting of a barrel, a tip attached to the tip of the barrel, a shaft attached to the rear end of the bunnell, and a flight attached to the shaft,
Inside the barrel, screw holes that open to both ends of the barrel are formed on both the front and rear sides of the partition wall in the center in the axial direction from the opening end to the partition wall. The mounting screw part to be screwed into the hole and the mounting screw part to be screwed into the rear side screw hole are formed at the tip part of the shaft, respectively, and can be screwed into each screw hole of the barrel. A plurality of types of weight pieces having different weights with different lengths are provided, and these weight pieces are selectively screwed into the front screw holes and the rear screw holes of the barrel until they hit the partition wall . The dart is characterized in that the weight of the barrel and the position of the center of gravity are changed.