JP2502543Y2 - Bicycle wheel - Google Patents

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】本考案は車輪本体を合成樹脂によ
り一体成形するようにした自転車用車輪に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle wheel in which a wheel body is integrally molded of synthetic resin.

【０００２】[0002]

【従来の技術】自転車用車輪には、ハブ体に外嵌する筒
状の取付部と、該取付部から放射状に突出した複数のス
ポーク部と、各スポーク部の外端と連結する円形のリム
部とを有する車輪本体を合成樹脂により一体成形するよ
うにしたものがある。ところが、取付部はその外周面か
ら複数のスポーク部を放射状に突出する必要等のため
に、ある程度その外径を大にする必要があるが、従来で
は単にハブ体をインサートして車輌本体を成形してい
た。2. Description of the Related Art A bicycle wheel has a cylindrical mounting portion which is externally fitted to a hub body, a plurality of spoke portions radially protruding from the mounting portion, and a circular rim which is connected to outer ends of the respective spoke portions. There is one in which a wheel main body having a section is integrally formed of synthetic resin. However, it is necessary to increase the outer diameter of the mounting part to some extent because it is necessary to radially project a plurality of spoke parts from the outer peripheral surface, but in the past, the hub body was simply inserted to form the vehicle body. Was.

【０００３】[0003]

【考案が解決しようとする課題】従って、従来の場合、
取付部の肉厚即ちハブ体の筒部外面から取付部外周面ま
での肉厚が大になり、このため射出成形後に車輪本体を
冷却して収縮させる際に、収縮率のばらつきにより取付
部の外面がいびつになったり、また、このためスポーク
部が軸方向に傾斜してそのセンターが出しにくくなった
りした。また成形の際にハブ体の筒部外周に多量の樹脂
を注入する必要から、樹脂の射出圧を大にし、また射出
後の冷却時間も長くする必要があり、製造が非常に面倒
であった。[Problem to be solved by the invention] Therefore, in the conventional case,
The wall thickness of the mounting portion, that is, the thickness from the outer surface of the tubular portion of the hub body to the outer peripheral surface of the mounting portion becomes large.Therefore, when the wheel body is cooled and contracted after the injection molding, the variation of the contraction rate causes The outer surface was distorted, and this caused the spokes to incline in the axial direction, making it difficult to reach the center. In addition, since it is necessary to inject a large amount of resin into the outer periphery of the cylindrical portion of the hub body during molding, it is necessary to increase the injection pressure of the resin and to lengthen the cooling time after injection, which is very troublesome to manufacture. .

【０００４】本考案は上記問題点に鑑み、車輪本体の取
付部の外周面がいびつになったり、スポーク部が軸方向
に傾斜してセンターが出しにくくなったりする惧れがな
く、簡単かつ良好に車輪本体を成形できるようにしたも
のである。In view of the above-mentioned problems, the present invention is easy and good without fear that the outer peripheral surface of the mounting portion of the wheel body will be distorted or that the spoke portion will be inclined in the axial direction and the center will be difficult to come out. The wheel body can be molded into.

【０００５】[0005]

【課題を解決するための手段】この技術的課題を解決す
るための本考案の技術的手段は、ハブ体１に外嵌する筒
状の取付部１５と、該取付部１５から突出された複数の
スポーク部１６と、各スポーク部１６の外端と連結する
環状のリム部１７とを一体に有する車輪本体１４が合成
樹脂により一体成形された自転車用車輪において、前記
取付部１５が、ハブ体１に外嵌固着された内筒体２０
と、内筒体２０の周囲を同心状に取囲みかつスポーク部
１６を突出した外筒体２１と、前記内筒体２０と外筒体
２１とを径方向に連結するように筒体２０，２１間に放
射状に配置された複数の連結体２２とを備えて成り、各
スポーク部１６及び各連結体２２は、夫々車輪全周に亘
って周方向等間隔おきに配置され、前記スポーク部１６
の個数と連結体２２の個数とは同一数とされ、各スポー
ク部１６は、夫々周方向に隣合う連結体２２同志の中間
の方向に位置するように径方向に設けられると共に、該
スポーク部１６の一部を構成しかつ車軸方向に平行な板
面を有するスポーク板体２６を備え、各スポーク部１６
の内端部は、スポーク板体２６の内端部が一対の連結脚
２７ａ，２７ｂにＶ字状に分かれるように、二又状とさ
れ、該一対の連結脚２７ａ，２７ｂは、周方向に隣合う
連結体２２の外端に略対応する位置で夫々外筒体２１に
連結され、前記各スポーク板体（２６）のＶ字状に分か
れた一対の連結脚（２７ａ）（２７ｂ）と外筒体（２
１）の一部とで三角形に近似した形状の補強枠（３１）
が形成され、該補強枠（３１）は、取付部（１５）の外
周側に全周に亘って連続状に設けられ、車軸本体（１
４）の軸心から前記スポーク板体（２６）のＶ字状に分
かれた分岐点ａまでの長さｔが、スポーク板体（２６）
の分岐点ａからリム部（１７）までの長さＴよりも小に
形成されている点にある。The technical means of the present invention for solving this technical problem is a cylindrical mounting portion 15 fitted onto the hub body 1, and a plurality of protruding portions from the mounting portion 15. In a bicycle wheel in which a wheel main body 14 integrally having a spoke portion 16 and an annular rim portion 17 connected to the outer end of each spoke portion 16 is integrally molded of synthetic resin, the mounting portion 15 is a hub body. Inner cylindrical body 20 externally fitted and fixed to 1
An outer cylindrical body 21 that concentrically surrounds the inner cylindrical body 20 and protrudes the spokes 16, and the cylindrical body 20 so as to connect the inner cylindrical body 20 and the outer cylindrical body 21 in the radial direction. 21 and a plurality of connecting bodies 22 radially arranged between the spokes 16. The spoke portions 16 and the connecting bodies 22 are arranged at equal intervals in the circumferential direction over the entire circumference of the wheel.
And the number of connecting bodies 22 are the same, and each spoke portion 16 is provided in the radial direction so as to be located in the middle direction between the connecting bodies 22 adjacent to each other in the circumferential direction. Each of the spoke portions 16 is provided with a spoke plate body 26 that forms a part of the plate 16 and has a plate surface parallel to the axle direction.
The inner end of the spoke plate 26 is bifurcated so that the inner end of the spoke plate 26 is divided into a pair of connecting legs 27a and 27b in a V shape, and the pair of connecting legs 27a and 27b are circumferentially arranged. The spoke plates (26) are connected to the outer cylinder body 21 at positions substantially corresponding to the outer ends of the adjacent connection bodies 22, respectively, and are connected to the pair of V-shaped connection legs (27a) (27b) of the spoke plates (26) and the outside. Tube (2
Reinforcing frame (31) shaped like a triangle with part of 1)
And the reinforcing frame (31) is continuously provided on the outer peripheral side of the mounting portion (15) over the entire circumference.
The length t from the axis of 4) to the V-shaped branch point a of the spoke plate (26) is the spoke plate (26).
Is formed to be smaller than the length T from the branch point a to the rim portion (17).

【０００６】[0006]

【作用】取付部１５の外径を大にしたままでも、該取付
部１５の各部即ち筒体２０，２１及び連結体２２を薄く
形成でき、従って成形後に車輪本体１４を冷却して収縮
させる際に、収縮率のばらつきにより取付部１５の外周
面がいびつになったりする惧れがなくなる。Even if the outer diameter of the mounting portion 15 is kept large, the respective parts of the mounting portion 15, that is, the cylinders 20 and 21 and the connecting body 22 can be thinly formed. Therefore, when the wheel body 14 is cooled and contracted after molding. In addition, there is no fear that the outer peripheral surface of the mounting portion 15 becomes distorted due to the variation in shrinkage rate.

【０００７】[0007]

【実施例】以下、本考案を図示の実施例に従って説明す
ると、図において、１は自転車用車輪のハブ体で、ハブ
胴２と、該ハブ胴２に軸心廻り回動自在に挿通したハブ
軸３とを備える。ハブ胴２は軸方向全長に亘って同一の
外径を有する円筒形に形成され、ハブ胴２の外周面には
周方向の環状凹部４が軸方向に離間して一対没設形成さ
れている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described with reference to the illustrated embodiments. In the drawings, reference numeral 1 is a bicycle wheel hub body, which is a hub barrel 2 and a hub rotatably inserted around the hub barrel 2. And a shaft 3. The hub barrel 2 is formed in a cylindrical shape having the same outer diameter over the entire axial length, and a pair of circumferential annular recesses 4 are formed on the outer peripheral surface of the hub barrel 2 so as to be spaced apart in the axial direction. .

【０００８】５はハブ胴２とハブ軸３との間に設けた軸
方向一対のベアリングで、各ベアリング５はハブ胴２側
の球受け６と、該球受け６との間で複数の球体７を挟む
ハブ軸３側の球押え９とを有する。球受け６はハブ胴２
の軸方向両端部の内面側を椀状に切欠くことによりハブ
胴２に一体に形成されている。球押え９は、ハブ軸３の
両端部に螺合され、球体７を軸方向外方から球受け６に
向けて押圧している。なお、球体７は球受け６と球押え
９との間に一定間隔をおいて環状に並ぶように図示省略
のリテーナにより保持されている。Reference numeral 5 denotes a pair of bearings in the axial direction provided between the hub barrel 2 and the hub shaft 3. Each bearing 5 has a ball receiver 6 on the hub barrel 2 side and a plurality of spherical bodies between the ball receivers 6. 7 and a ball retainer 9 on the hub shaft 3 side. The ball receiver 6 is the hub barrel 2
Is formed integrally with the hub barrel 2 by notching the inner surface sides of both axial ends of the above in a bowl shape. The ball retainer 9 is screwed into both ends of the hub shaft 3 and presses the spherical body 7 toward the ball receiver 6 from the outside in the axial direction. The spheres 7 are held by a retainer (not shown) so as to be lined up in a ring between the sphere receiver 6 and the sphere retainer 9 at a constant interval.

【０００９】１０は軸方向一対のロックナットで、ハブ
軸３に螺合され、球押え９に対して軸方向外方側から圧
接され、球押え９が弛まないようにロックしている。１
１はダストキャップで、プレス加工により中央孔と軸方
向内方に折曲した外周縁部とを有する円板状に形成さ
れ、該キャップ１１は球押え９に対して圧入により一体
化するように外嵌固着され、球受け６と球押え９との間
の外端側開口を塞いでいる。A pair of axial lock nuts 10 are screwed onto the hub shaft 3 and are pressed against the ball retainer 9 from the outside in the axial direction to lock the ball retainer 9 so as not to loosen. 1
Reference numeral 1 denotes a dust cap, which is formed in a disk shape having a central hole and an outer peripheral edge portion bent inward in the axial direction by press working, and the cap 11 is integrated with the ball retainer 9 by press fitting. It is externally fitted and fixed, and closes the outer end side opening between the ball receiver 6 and the ball retainer 9.

【００１０】１４は車輪本体で、ハブ体１に外嵌する筒
状の取付部１５と、該取付部１５から径方向に放射状に
突出された複数のスポーク部１６と、各スポーク部１６
の外端を連結するリム部１７とを一体に有し、車輪本体
１４はハブ体１をインサートした状態で合成樹脂により
一体成形されている。取付部１５は、内筒体２０と外筒
体２１と筒体２０，２１間に放射状に配置された複数の
連結体２２とを備えて成り、内筒体２０はハブ胴２に外
嵌固着され、内筒体２０にはハブ胴２の環状凹部４に嵌
合する環状凸部２３が一体に形成されている。この外筒
体２１にスポーク部１６が放射状に突出されている。連
結体２２は周方向に等間隔をおいて複数あり、夫々内筒
体２０と外筒体２１とを径方向に連結している。Reference numeral 14 denotes a wheel body, which is a cylindrical mounting portion 15 fitted onto the hub body 1, a plurality of spoke portions 16 radially protruding from the mounting portion 15, and each spoke portion 16.
The wheel body 14 is integrally formed of synthetic resin with the hub body 1 inserted. The mounting portion 15 includes an inner tubular body 20, an outer tubular body 21, and a plurality of connecting bodies 22 radially arranged between the tubular bodies 20, 21. The inner tubular body 20 is externally fitted and fixed to the hub barrel 2. The inner cylindrical body 20 is integrally formed with an annular convex portion 23 that fits into the annular concave portion 4 of the hub barrel 2. The spoke portions 16 are radially projected on the outer cylinder body 21. A plurality of connecting bodies 22 are arranged at equal intervals in the circumferential direction, and respectively connect the inner cylindrical body 20 and the outer cylindrical body 21 in the radial direction.

【００１１】前記各スポーク部１６は、夫々周方向に隣
合う連結体２２同志の中間の方向に位置するように、リ
ム部１７から取付部１５に向けて車輪径方向に配置され
ると共に、車輪全体に亘って周方向等間隔おきに配置さ
れている。また各スポーク部１６は、車軸方向に垂直な
板面を有するスポーク本体２５と、車軸方向に平行な板
面を有するスポーク板体２６とを一体に備えて成る。各
スポーク部１６の内端部は、スポーク板体２６の内端部
が一対の連結脚２７ａ，２７ｂにＶ字状に分かれるよう
に、二又状とされている。The respective spoke portions 16 are arranged in the wheel radial direction from the rim portion 17 toward the mounting portion 15 so as to be located in the middle direction between the connecting bodies 22 adjacent to each other in the circumferential direction. They are arranged at equal intervals in the circumferential direction over the whole. Each of the spoke portions 16 integrally includes a spoke body 25 having a plate surface perpendicular to the axle direction and a spoke plate body 26 having a plate surface parallel to the axle direction. The inner end of each spoke 16 is bifurcated so that the inner end of the spoke plate 26 is divided into a pair of connecting legs 27a and 27b in a V shape.

【００１２】前記スポーク部１６の個数と連結体２２の
個数とは同一数とされ、各スポーク板体２６の連結脚２
７ａ，２７ｂの基端は、周方向に隣り合う連結体２２の
外端に略対応する位置で、外筒体２１に夫々連結されて
いる。前記各スポーク板体（２６）のＶ字状に分かれた
一対の連結脚（２７ａ）（２７ｂ）と外筒体（２１）の
一部とで三角形に近似した形状の補強枠（３１）が形成
されている。この補強枠（３１）は、取付部（１５）の
外周側に全周に亘って連続状に設けられている。また、
車軸本体（１４）の軸心から前記スポーク板体（２６）
のＶ字状に分かれた分岐点ａまでの長さｔは、スポーク
板体（２６）の分岐点ａからリム部（１７）までの長さ
Ｔよりも小に形成されている。The number of the spoke portions 16 and the number of the connecting members 22 are the same, and the connecting legs 2 of each spoke plate member 26.
The base ends of 7a and 27b are respectively connected to the outer cylindrical body 21 at positions substantially corresponding to the outer ends of the connecting bodies 22 that are adjacent in the circumferential direction. A pair of connecting legs (27a) (27b) divided in a V shape of each of the spoke plates (26) and a part of the outer cylinder body (21) form a reinforcing frame (31) having a shape close to a triangle. Has been done. The reinforcing frame (31) is continuously provided on the outer peripheral side of the mounting portion (15) over the entire circumference. Also,
The spoke plate (26) from the axis of the axle body (14)
The length t to the branch point a which is divided into a V shape is smaller than the length T from the branch point a of the spoke plate (26) to the rim portion (17).

【００１３】[0013]

【考案の効果】本考案によれば、車輪本体１４の取付部
１５が、ハブ体１のハブ胴２に外嵌固着された内筒体２
０と、内筒体２０の周囲を同心状に取囲みかつスポーク
部１６に突出した外筒体２１と、前記内筒体２０と外筒
体２１とを径方向に連結するように筒体２０，２１間に
放射状に配置された複数の連結体２２とを備えて成るの
で、取付部１５の外径を大にしたままで、取付部１５の
各部分の肉厚即ち、筒体２０，２１及び連結体２２の肉
厚を小さく形成できる。従って、放射成形後に車輪本体
１４を冷却して収縮させる際に、収縮率のばらつきによ
り取付部１５の外面がいびつになったり、スポーク部１
６が軸方向に傾斜してそのセンターが出しにくくなった
りする惧れがなくなり、また成形の際にハブ体１のハブ
胴２外周に多量の樹脂を注入する必要もなくなり、この
ため樹脂の射出圧を小にできるし、射出後の冷却時間が
短くて済み、製造が非常に簡単になる。According to the present invention, the inner cylinder body 2 in which the mounting portion 15 of the wheel body 14 is externally fitted and fixed to the hub body 2 of the hub body 1.
0, the outer cylindrical body 21 surrounding the inner cylindrical body 20 concentrically and protruding to the spoke portion 16, and the cylindrical body 20 so as to connect the inner cylindrical body 20 and the outer cylindrical body 21 in the radial direction. , 21 and a plurality of connecting bodies 22 arranged radially between them, the wall thickness of each portion of the mounting portion 15, that is, the tubular bodies 20, 21 while keeping the outer diameter of the mounting portion 15 large. Also, the thickness of the connecting body 22 can be reduced. Therefore, when the wheel body 14 is cooled and contracted after the radiation molding, the outer surface of the mounting portion 15 becomes distorted due to the variation of the contraction rate, and the spoke portion 1
There is no fear that 6 will be tilted in the axial direction and the center will be difficult to come out, and it is not necessary to inject a large amount of resin into the outer periphery of the hub barrel 2 of the hub body 1 at the time of molding. The pressure is low, the cooling time after injection is short, and the manufacturing is very easy.

【００１４】また、各スポーク部１６は、夫々周方向に
隣合う連結体２２同志の中間の方向に位置するように径
方向に設けられ、各スポーク部１６の内端部は、スポー
ク板体２６の内端部が一対の連結脚２７ａ，２７ｂにＶ
字状に分かれるように、二又状とされ、該一対の連結脚
２７ａ，２７ｂは、周方向に隣合う連結体２２の外端に
略対応する位置で夫々外筒体２１に連結されているの
で、スポーク部１６から取付部１５に向けて作用する押
圧力又は引張力を、夫々隣合う連結体２２同志の中間に
位置する径方向に一致させて作用させることができ、し
かもこの押圧力又は引張力をスポーク部１６の内端部で
Ｖ字状に分けて、一対の連結脚２７ａ，２７ｂから周方
向に隣合う連結体２２外端に合致させて受けさせること
ができるし、逆に取付部１５からスポーク部１６に向け
て作用する押圧力又は引張力を、連結体２２外端から連
結脚２７ａ，２７ｂによって周方向に隣合うスポーク部
１６にＶ字状に分けて作用させることができ、しかもこ
の押圧力又は引張力を、夫々周方向に隣合う連結体２２
同志の中間に位置する径方向に合致させて受けさせるこ
とができ、その結果周方向の一部に集中して作用するス
ポーク部１６又は取付部１５への力をうまく分散させ
て、連結体２２及びスポーク板体２６を介して極めて効
果的に受け合うことができる。Further, each spoke portion 16 is provided in the radial direction so as to be positioned in the middle direction between the connecting bodies 22 adjacent to each other in the circumferential direction, and the inner end portion of each spoke portion 16 has a spoke plate 26. The inner end of the V is connected to the pair of connecting legs 27a and 27b by V.
The pair of connecting legs 27a and 27b are connected to the outer cylindrical body 21 at positions substantially corresponding to the outer ends of the adjacent connecting bodies 22 in the circumferential direction. Therefore, the pressing force or the tensile force acting from the spoke portion 16 toward the mounting portion 15 can be made to coincide with each other in the radial direction located in the middle of the adjacent connecting bodies 22, and the pressing force or the pulling force can be applied. The pulling force can be divided into V-shapes at the inner ends of the spokes 16, and can be received by the outer ends of the pair of connecting legs 27a and 27b that are adjacent to each other in the circumferential direction. The pressing force or the tensile force acting from the portion 15 toward the spoke portion 16 can be applied from the outer end of the connecting body 22 to the adjacent spoke portions 16 in the circumferential direction by the connecting legs 27a and 27b in a V-shape. Moreover, this pressing force or pulling force , Connecting member 22 adjacent to each circumferential direction
The connecting members 22 can be received by being matched with each other in the radial direction located in the middle of each other, and as a result, the force acting on the spokes 16 or the attachments 15 concentrated in a part of the circumferential direction can be dispersed well. And, it can be received very effectively via the spoke plate 26.

【００１５】さらに、前記各スポーク板体（２６）のＶ
字状に分かれた一対の連結脚（２７ａ）（２７ｂ）と外
筒体（２１）の一部とで三角形に近似した形状の補強枠
（３１）が形成され、該補強枠（３１）は、取付部（１
５）の外周側に全周に亘って連続状に設けられているの
で、スポーク部１６の内端部側を、連続した三角形状の
枠構造によって効果的に剛性を高めることができる。し
かも、車軸本体（１４）の軸心から前記スポーク板体
（２６）のＶ字状に分かれた分岐点ａまでの長さｔは、
スポーク板体（２６）の分岐点ａからリム部（１７）ま
での長さＴよりも小に形成されているので、スポーク部
１６と取付部１５との間に作用する押圧力又は引張力が
集中して最も剛性が必要とされる車軸本体（１４）の中
央部側の強度を十分に高めることができる。Further, the V of each spoke plate (26)
A pair of connecting legs (27a) (27b) divided in a letter shape and a part of the outer cylinder (21) form a reinforcing frame (31) having a shape close to a triangle, and the reinforcing frame (31) is Mounting part (1
Since it is continuously provided on the outer peripheral side of 5) over the entire circumference, the inner end side of the spoke portion 16 can be effectively increased in rigidity by the continuous triangular frame structure. Moreover, the length t from the axis of the axle body (14) to the branch point a of the spoke plate (26) divided into the V shape is
Since it is formed to be smaller than the length T from the branch point a of the spoke plate (26) to the rim portion (17), the pressing force or the tensile force acting between the spoke portion 16 and the mounting portion 15 is It is possible to sufficiently increase the strength of the central portion side of the axle body (14), which is concentrated and requires the most rigidity.

【００１６】従って、スポーク部１６と取付部１５との
間に相当強い力が作用しても、取付部１５やスポーク部
１６の内端部が変形したり損傷したりする惧れがなくな
り、自転車用車輪を丈夫で長期使用に十分耐えるものに
なし得る。さらに、各スポーク部１６及び各連結体２２
は、夫々車輪全周に亘って周方向等間隔おきに配置さ
れ、前記スポーク部１６の個数と連結体２２の個数とは
同一数とされているので、総ての連結体２２に対して各
スポーク部１６の内端が対応する関係になり、従って全
部の連結体２２を無駄なく有効に利用して、スポーク部
１６から取付部１５に向けて作用する力を効率よく受け
ることができ、この点からも取付部１５を丈夫でかつ無
駄な連結体２２を無くして極力構造を簡単になし得、そ
の実用的効果は著大である。Therefore, even if a considerably strong force is applied between the spoke portion 16 and the mounting portion 15, there is no fear that the inner ends of the mounting portion 15 and the spoke portion 16 will be deformed or damaged, and the bicycle will not be damaged. The wheels can be made durable and durable enough for long-term use. Furthermore, each spoke portion 16 and each connecting body 22
Are arranged at equal intervals in the circumferential direction over the entire circumference of the wheel, and the number of the spoke portions 16 and the number of the connecting bodies 22 are the same. The inner ends of the spokes 16 have a corresponding relationship, and therefore, all the connecting members 22 can be effectively used without waste, and the force acting from the spokes 16 toward the mounting portion 15 can be efficiently received. Also from the point of view, the mounting portion 15 is durable and the useless connecting body 22 can be eliminated to make the structure as simple as possible, and its practical effect is remarkable.

【図面の簡単な説明】[Brief description of drawings]

【図１】本考案の一実施例を示す側面図である。FIG. 1 is a side view showing an embodiment of the present invention.

【図２】縦断面図である。FIG. 2 is a longitudinal sectional view.

【図３】ハブ体部分の拡大断面図である。FIG. 3 is an enlarged sectional view of a hub body portion.

【符号の説明】[Explanation of symbols]

１ ハブ体 １４ 車輪本体 １５ 取付部 １６ スポーク部 １７ リム部 ２０ 内筒体 ２１ 外筒体 ２２ 連結体 ２６ スポーク板体 ２７ａ 連結脚 ２７ｂ 連結脚 ３１ 補強枠 DESCRIPTION OF SYMBOLS 1 Hub body 14 Wheel body 15 Mounting part 16 Spoke part 17 Rim part 20 Inner cylinder body 21 Outer cylinder body 22 Connection body 26 Spoke plate body 27a Connection leg 27b Connection leg 31 Reinforcement frame

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭56−82601（ＪＰ，Ａ) 特開 昭60−209301（ＪＰ，Ａ) 欧州特許公開14990（ＥＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-82601 (JP, A) JP-A-60-209301 (JP, A) European Patent Publication 14990 (EP, A)

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of utility model registration request] 【請求項１】ハブ体（１）に外嵌する筒状の取付部（１
５）と、該取付部（１５）から突出された複数のスポー
ク部（１６）と、各スポーク部（１６）の外端と連結す
る環状のリム部（１７）とを一体に有する車輪本体（１
４）が合成樹脂により一体成形された自転車用車輪にお
いて、前記取付部（１５）が、ハブ体（１）に外嵌固着
された内筒体（２０）と、内筒体（２０）の周囲を同心
状に取囲みかつスポーク部（１６）を突出した外筒体
（２１）と、前記内筒体（２０）と外筒体（２１）とを
径方向に連結するように筒体（２０）（２１）間に放射
状に配置された複数の連結体（２２）とを備えて成り、
各スポーク部（１６）及び各連結体（２２）は、夫々車
輪全周に亘って周方向等間隔おきに配置され、前記スポ
ーク部（１６）の個数と連結体（２２）の個数とは同一
数とされ、各スポーク部（１６）は、夫々周方向に隣合
う連結体（２２）同志の中間の方向に位置するように径
方向に設けられると共に、該スポーク部（１６）の一部
を構成しかつ車軸方向に平行な板面を有するスポーク板
体（２６）を備え、各スポーク部（１６）の内端部は、
スポーク板体（２６）の内端部が一対の連結脚（２７
ａ）（２７ｂ）にＶ字状に分かれるように、二又状とさ
れ、該一対の連結脚（２７ａ）（２７ｂ）は、周方向に
隣合う連結体（２２）の外端に略対応する位置で夫々外
筒体（２１）に連結され、前記各スポーク板体（２６）
のＶ字状に分かれた一対の連結脚（２７ａ）（２７ｂ）
と外筒体（２１）の一部とで三角形に近似した形状の補
強枠（３１）が形成され、該補強枠（３１）は、取付部
（１５）の外周側に全周に亘って連続状に設けられ、車
軸本体（１４）の軸心から前記スポーク板体（２６）の
Ｖ字状に分かれた分岐点ａまでの長さｔが、スポーク板
体（２６）の分岐点ａからリム部（１７）までの長さＴ
よりも小に形成されていることを特徴とする自転車用車
輪。Claim: What is claimed is: 1. A tubular mounting portion (1) which is fitted onto a hub body (1).
5), a plurality of spoke portions (16) protruding from the mounting portion (15), and an annular rim portion (17) connected to the outer ends of the spoke portions (16), which are integrally formed into a wheel body ( 1
In a bicycle wheel in which 4) is integrally molded of synthetic resin, the mounting portion (15) has an inner cylindrical body (20) externally fitted and fixed to the hub body (1), and the periphery of the inner cylindrical body (20). An outer cylinder body (21) that concentrically surrounds each other and projects the spoke portion (16), and the cylinder body (20) so as to radially connect the inner cylinder body (20) and the outer cylinder body (21). ) (21) and a plurality of connecting bodies (22) radially arranged,
The spokes (16) and the connecting bodies (22) are arranged at equal intervals in the circumferential direction over the entire circumference of the wheel, and the number of the spokes (16) and the number of the connecting bodies (22) are the same. Each spoke portion (16) is provided in the radial direction so as to be located in the intermediate direction between the adjacent coupling bodies (22) in the circumferential direction, and a part of the spoke portion (16) is provided. A spoke plate body (26) that is configured and has a plate surface parallel to the axle direction is provided, and an inner end portion of each spoke portion (16) is
The inner end of the spoke plate (26) has a pair of connecting legs (27).
a) and (27b) are bifurcated so as to be divided into V-shapes, and the pair of connecting legs (27a) and (27b) substantially correspond to the outer ends of adjacent connecting bodies (22) in the circumferential direction. The spoke plates (26) connected to the outer cylinders (21) at the respective positions.
Pair of connecting legs (27a) (27b) divided into V shape
And a part of the outer cylinder body (21) form a reinforcing frame (31) having a shape close to a triangle, and the reinforcing frame (31) is continuous on the outer peripheral side of the mounting portion (15) over the entire circumference. The length t from the axial center of the axle body (14) to the V-shaped branch point a of the spoke plate (26) is determined from the branch point a of the spoke plate (26) to the rim. Length T to part (17)
A bicycle wheel characterized by being formed smaller than the above.