JPH05124564A - Bracket lug of bicycle frame - Google Patents
Bracket lug of bicycle frameInfo
- Publication number
- JPH05124564A JPH05124564A JP28880391A JP28880391A JPH05124564A JP H05124564 A JPH05124564 A JP H05124564A JP 28880391 A JP28880391 A JP 28880391A JP 28880391 A JP28880391 A JP 28880391A JP H05124564 A JPH05124564 A JP H05124564A
- Authority
- JP
- Japan
- Prior art keywords
- lug
- pipe
- chain stay
- lower pipe
- hanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Motorcycle And Bicycle Frame (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、自転車用フレームのハ
ンガーラグ部の構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a hanger lug portion of a bicycle frame.
【0002】[0002]
【従来の技術】図4は、自転車のハンガー部を示すもの
で、図中1は自転車用フレームの下パイプ、2は立パイ
プ、3はチエンステー、4は下パイプ1、立パイプ2お
よびチエンステー3とそれぞれ接続したハンガーラグ、
5はこのハンガーラグ4内に嵌入した軸受用内筒、6は
この軸受用内筒5を貫通して回転自在に設けたクランク
シャフト、7はクランクアーム、8はクランクペダル、
9はクランクギヤ、10はチエン、11は後輪である。2. Description of the Related Art FIG. 4 shows a hanger portion of a bicycle. In the figure, 1 is a lower pipe of a bicycle frame, 2 is a standing pipe, 3 is a chain stay, 4 is a lower pipe 1, a standing pipe 2 and a chain stay 3. Hanger rug connected to each
Reference numeral 5 denotes a bearing inner cylinder fitted in the hanger lug 4, 6 denotes a crankshaft rotatably provided through the bearing inner cylinder 5, 7 denotes a crank arm, 8 denotes a crank pedal,
Reference numeral 9 is a crank gear, 10 is a chain, and 11 is a rear wheel.
【0003】図5は、従来の自転車用フレームのハンガ
ーラグと各フレームパイプとの接合部の組み立て前の状
態を示すもので、図中前記符号と同一の符号は同等のも
のを示す。4aは下パイプ1との接続部、4bは立パイ
プ2との接続部、4cはチエンステー3との接続部であ
る。FIG. 5 shows a state before assembly of a joint portion between a hanger lug of a conventional bicycle frame and each frame pipe, and the same reference numerals as those in the drawing denote the same parts. Reference numeral 4a is a connecting portion with the lower pipe 1, 4b is a connecting portion with the standing pipe 2, and 4c is a connecting portion with the chain stay 3.
【0004】[0004]
【発明が解決しようとする課題】図4に示すように自転
車のペダル8に掛かる踏力は、クランクアーム7および
クランクシャフト6を経てハンガーラグ4にモーメント
として作用し、その結果立パイプ2および下パイプ1と
ハンガーラグ4との接続部付近に大きなストレスが掛か
る。そして、この剛性強度が不足すると踏力による撓み
Aが生じて伝動ロスも増大するのである。As shown in FIG. 4, the pedaling force applied to the pedal 8 of the bicycle acts as a moment on the hanger lug 4 through the crank arm 7 and the crankshaft 6, and as a result, the standing pipe 2 and the lower pipe. Large stress is applied to the vicinity of the connecting portion between 1 and the hanger lug 4. If this rigidity strength is insufficient, bending A due to the pedaling force occurs, and the transmission loss also increases.
【0005】上述の不具合をなくすためには、立パイプ
2および下パイプ1を、ハンガーラグ4との接続部に近
づくほど次第に径を拡張した末広管状の形状にすればよ
いが、立パイプ2および下パイプ1を末広管状に形成し
た場合は、図5に示したように、下パイプ1および立パ
イプ2をハンガーラグ4の接続部4a,4bの外側から
挿入することができなくなるという問題点があった。In order to eliminate the above-mentioned inconvenience, the standing pipe 2 and the lower pipe 1 may be formed in a divergent tubular shape whose diameter gradually expands toward the connecting portion with the hanger lug 4, but the standing pipe 2 and When the lower pipe 1 is formed in a divergent tubular shape, as shown in FIG. 5, there is a problem that the lower pipe 1 and the vertical pipe 2 cannot be inserted from the outside of the connecting portions 4a and 4b of the hanger lug 4. there were.
【0006】[0006]
【課題を解決するための手段】上述の問題点を解決する
ため本発明においては、立パイプと下パイプとチエンス
テーとの接続部をそれぞれ一体に形成したハンガーラグ
を、下パイプ取り付け位置とチエンステー取り付け位置
において、下パイプの中心線とチエンステーの中心線を
含む平面によってそれぞれ上下に分割して上型ラグと下
型ラグとを形成し、この上型ラグの内側から立パイプを
挿入すると共に、下パイプとチエンステーと軸受用内筒
とを前記上型ラグと下型ラグとによって挟持して溶接す
ることにより自転車用フレームのハンガーラグを構成す
る。In order to solve the above-mentioned problems, in the present invention, a hanger lug integrally formed with a connecting portion of a standing pipe, a lower pipe and a chain stay is attached to a lower pipe mounting position and a chain stay mounting position. At the position, an upper mold lug and a lower mold lug are formed by vertically dividing each by a plane including the center line of the lower pipe and the center line of the chain stay, and the vertical pipe is inserted from the inside of the upper mold lug, and A hanger lug of a bicycle frame is formed by sandwiching and welding a pipe, a chain stay, and a bearing inner cylinder with the upper mold lug and the lower mold lug.
【0007】[0007]
【作用】上述のように本発明においては、ハンガーラグ
を上型ラグと下型ラグとに分割したから、末広管状に形
成した立パイプでも上型ラグの内側から挿入することが
できる。また末広管状に形成した下パイプはチエンステ
ーおよび軸受用内筒と共に、前記上型ラグと下型ラグと
によって挟持して溶接することにより自転車用フレーム
のハンガーラグ部を一体的に形成することができる。As described above, in the present invention, since the hanger lug is divided into the upper mold lug and the lower mold lug, a vertical pipe formed in a divergent tubular shape can be inserted from the inside of the upper mold lug. Further, the lower pipe formed in a divergent tubular shape, together with the chain stay and the inner cylinder for the bearing, is sandwiched by the upper mold lug and the lower mold lug and welded, whereby the hanger lug portion of the bicycle frame can be integrally formed. ..
【0008】上述のように本発明によれば、立パイプお
よび下パイプを末広管状に形成することができるように
なり、これによってハンガー部の剛性を高めることによ
り、クランクペダルの踏力によって生ずる撓みを抑制し
て、自転車の伝動ロスを極力小さくすることができる。As described above, according to the present invention, it becomes possible to form the standing pipe and the lower pipe in a divergent tube shape, thereby increasing the rigidity of the hanger portion, so that the bending caused by the pedaling force of the crank pedal can be prevented. By suppressing, the transmission loss of the bicycle can be minimized.
【0009】[0009]
【実施例】以下、図1〜図3について本発明の一実施例
を説明する。図中前記符号と同一の符号は同等のものを
示す。すなわち図中1は下パイプ、2は立パイプ、3は
チエンステー、4はハンガーラグ、4aは下パイプ1と
の接続部、4bは立パイプ2との接続部、4cはチエン
ステー3との接続部、5は軸受用内筒である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, the same reference numerals as those used above denote the same components. That is, in the figure, 1 is a lower pipe, 2 is a standing pipe, 3 is a chain stay, 4 is a hanger lug, 4a is a connecting part with the lower pipe 1, 4b is a connecting part with the standing pipe 2, 4c is a connecting part with the chain stay 3. Reference numeral 5 is an inner cylinder for the bearing.
【0010】本実施例においては、下パイプ1と立パイ
プ2とチエンステー3との接続部4a,4b,4cをそ
れぞれ一体に形成したハンガーラグ4を、下パイプ取り
付け位置とチエンステー取り付け位置において、下パイ
プ1の中心線とチエンステー3の中心線を含む平面L1,
L2 によってそれぞれ上下に分割して上型ラグ4Aと下
型ラグ4Bとを形成し、この上型ラグ4Aの内側から、
図2に示すように、立パイプ2を挿入すると共に、下パ
イプ1とチエンステー3と軸受用内筒5とを上型ラグ4
Aの下方からあてがった後、下型ラグ4Bを矢印Bのよ
うに下からかぶせて前記上型ラグ4Aと下型ラグ4Bと
によって下パイプ1およびチエンステー3を挟持して各
接合部を溶接することにより自転車用フレームのハンガ
ーラグを構成する。In the present embodiment, the hanger lug 4 integrally formed with the connecting portions 4a, 4b and 4c of the lower pipe 1, the standing pipe 2 and the chain stay 3 is provided at the lower pipe mounting position and the chain stay mounting position. A plane L 1 including the center line of the pipe 1 and the center line of the chain stay 3,
The upper mold lug 4A and the lower mold lug 4B are formed by dividing the upper mold lug 4A into upper and lower parts by L 2 , respectively.
As shown in FIG. 2, the vertical pipe 2 is inserted, and the lower pipe 1, the chain stay 3, and the bearing inner cylinder 5 are attached to the upper mold lug 4.
After applying from below A, the lower mold lug 4B is covered from below as indicated by arrow B, the lower pipe 1 and the chain stay 3 are sandwiched between the upper mold lug 4A and the lower mold lug 4B, and the respective joints are welded. This constitutes the hanger lug of the bicycle frame.
【0011】図3は、立パイプ2の中心線に沿って断面
にした断面図を示すもので、本発明によれば、立パイプ
2の下端部を拡張して、末広管状に形成し、立パイプ2
の下端の径Cを、接続部4bの上端の径Dより大きくし
ても、すなわちC>Dとしても、立パイプ2は上型ラグ
4Aの内側より挿入するため、組み立てに支障をきたす
ことはない。FIG. 3 is a sectional view taken along the center line of the upright pipe 2, and according to the present invention, the lower end of the upright pipe 2 is expanded to form a divergent tubular shape. Pipe 2
Even if the diameter C of the lower end of the vertical pipe is larger than the diameter D of the upper end of the connecting portion 4b, that is, C> D, the standing pipe 2 is inserted from the inside of the upper mold lug 4A, so that the assembly is not hindered. Absent.
【0012】[0012]
【発明の効果】上述のように本発明においては、ハンガ
ーラグ4を上型ラグ4Aと下型ラグ4Bとに分割したか
ら、末広管状に形成した立パイプ2でも上型ラグ4Aの
内側から挿入することができる。また末広管状に形成し
た下パイプ1はチエンステー3および軸受用内筒5と共
に、前記上型ラグ4Aと下型ラグ4Bとによって挟持し
て溶接することにより自転車用フレームのハンガーラグ
部を一体的に形成することができる。As described above, in the present invention, since the hanger lug 4 is divided into the upper mold lug 4A and the lower mold lug 4B, even the vertical pipe 2 formed in a divergent tube is inserted from the inside of the upper mold lug 4A. can do. The lower pipe 1 formed in a divergent tubular shape is held together with the chain stay 3 and the bearing inner cylinder 5 by the upper mold lug 4A and the lower mold lug 4B and welded together to integrally form the hanger lug portion of the bicycle frame. Can be formed.
【0013】上述のように本発明によれば、立パイプ2
および下パイプ1を末広管状に形成することができるよ
うになり、これによってハンガー部の剛性を高めること
により、クランクペダルの踏力によって生ずる撓みを抑
制して、自転車の伝動ロスを極力小さくすることができ
るというすぐれた効果が得られる。According to the present invention as described above, the vertical pipe 2
Also, the lower pipe 1 can be formed in a divergent tubular shape, which increases the rigidity of the hanger portion, thereby suppressing the bending caused by the pedaling force of the crank pedal and minimizing the transmission loss of the bicycle. The excellent effect of being able to do is obtained.
【図1】本発明によって組み立てた自転車用フレームの
ハンガーラグの斜視図である。FIG. 1 is a perspective view of a hanger lug of a bicycle frame assembled according to the present invention.
【図2】図1の下型ラグを結合する前の状態を示す斜視
図である。FIG. 2 is a perspective view showing a state before the lower mold lug of FIG. 1 is joined.
【図3】図1を立パイプの中心に沿って断面にした状態
を示す断面図である。FIG. 3 is a cross-sectional view showing a state in which FIG. 1 is taken along the center of a vertical pipe.
【図4】自転車のハンガー部を示す斜視図である。FIG. 4 is a perspective view showing a hanger portion of the bicycle.
【図5】従来の自転車用フレームのハンガーラグと各フ
レームパイプとの接合部の組み立て前の状態を示す斜視
図である。FIG. 5 is a perspective view showing a state before assembly of a joint portion between a hanger lug and a frame pipe of a conventional bicycle frame.
1 下パイプ 2 立パイプ 3 チエンステー 4 ハンガーラグ 4A 上型ラグ 4B 下型ラグ 4a,4b,4c 接続部 L1,L2 中心線を含む平面 5 軸受用内筒 6 クランクシャフト 7 クランクアーム 8 クランクペダル 9 クランクギヤ 10 チエン 11 後輪DESCRIPTION OF SYMBOLS 1 Lower pipe 2 Vertical pipe 3 Chain stay 4 Hanger lug 4A Upper mold lug 4B Lower mold lug 4a, 4b, 4c Connection part L 1 , L 2 Plane including the center line 5 Inner cylinder for bearing 6 Crankshaft 7 Crank arm 8 Crank pedal 9 Crank gear 10 Chain 11 Rear wheel
Claims (1)
接続部をそれぞれ一体に形成したハンガーラグを、下パ
イプ取り付け位置とチエンステー取り付け位置におい
て、下パイプの中心線とチエンステーの中心線を含む平
面によってそれぞれ上下に分割して上型ラグと下型ラグ
とを形成し、この上型ラグの内側から立パイプを挿入す
ると共に、下パイプとチエンステーと軸受用内筒とを前
記上型ラグと下型ラグとによって挟持して溶接すること
を特徴とする自転車用フレームのハンガーラグ。1. A hanger lug integrally formed with a connecting portion of a standing pipe, a lower pipe, and a chain stay, is provided with a plane including a center line of the lower pipe and a center line of the chain stay at a lower pipe mounting position and a chain stay mounting position. The upper mold lug and the lower mold lug are respectively divided into upper and lower parts, and a vertical pipe is inserted from the inside of the upper mold lug. A hanger lug for a bicycle frame, which is sandwiched and welded with a lug.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28880391A JPH05124564A (en) | 1991-11-05 | 1991-11-05 | Bracket lug of bicycle frame |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28880391A JPH05124564A (en) | 1991-11-05 | 1991-11-05 | Bracket lug of bicycle frame |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05124564A true JPH05124564A (en) | 1993-05-21 |
Family
ID=17734938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP28880391A Pending JPH05124564A (en) | 1991-11-05 | 1991-11-05 | Bracket lug of bicycle frame |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05124564A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1958760A3 (en) * | 2007-02-17 | 2010-02-17 | Trek Bicycle Corporation | Composite bicycle frame with bottom bracket assembly, fork and seat attachment |
-
1991
- 1991-11-05 JP JP28880391A patent/JPH05124564A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1958760A3 (en) * | 2007-02-17 | 2010-02-17 | Trek Bicycle Corporation | Composite bicycle frame with bottom bracket assembly, fork and seat attachment |
EP2311718A1 (en) * | 2007-02-17 | 2011-04-20 | Trek Bicycle Corporation | A bottom bracket assembly for a bicycle frame |
US8066295B1 (en) | 2007-02-17 | 2011-11-29 | Trek Bicycle Corporation | Composite bicycle frame with improved structure, geometry, seat attachment and fork |
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