JPH0343117Y2 - - Google Patents
Info
- Publication number
- JPH0343117Y2 JPH0343117Y2 JP19746885U JP19746885U JPH0343117Y2 JP H0343117 Y2 JPH0343117 Y2 JP H0343117Y2 JP 19746885 U JP19746885 U JP 19746885U JP 19746885 U JP19746885 U JP 19746885U JP H0343117 Y2 JPH0343117 Y2 JP H0343117Y2
- Authority
- JP
- Japan
- Prior art keywords
- stem
- sleeve
- hawk
- leg
- shoulder
- 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.)
- Expired
Links
- 239000002184 metal Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910001234 light alloy Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Steering Devices For Bicycles And Motorcycles (AREA)
Description
【考案の詳細な説明】
本考案は、軽金属製自転車の前ホーク脚に取付
ける鋼材製ステムの取付装置に関する。[Detailed Description of the Invention] The present invention relates to an attachment device for a steel stem to be attached to a front fork leg of a light metal bicycle.
従来軽金属をもつて自転車を製造する場合、前
ホークのステムをホーク脚と別に鋼材にて構成
し、このステムを軽金属で形成した前ホークの肩
部に接着剤で取付けることは軽金属にて自転車車
体を構成する技術として既に実施されているとこ
ろである。然し、接着剤のみによる固着では強度
の点、即ち走行中強力な外力が作用した場合、安
全性保持の上に問題がある。本考案はこの問題と
なる点の解消を目的としてなされたものである。 Conventionally, when manufacturing a bicycle using light metal, the stem of the front fork was made of steel separately from the fork leg, and this stem was attached to the shoulder of the front fork made of light metal with adhesive. This technology is already being implemented as a component of this technology. However, fixing with only adhesive has problems in terms of strength, that is, in maintaining safety when a strong external force is applied during driving. The present invention was made with the aim of solving this problem.
本考案の構成を図面に示す実施例によつて説明
すると、１は軽合金製前ホーク脚にして、肩部２
に中央にステム３の取付け用差込孔１０，１０を
設け、この差込孔に鋼材製ステム３の基端を螺合
した軽合金製スリーブ４を嵌合し、このスリーブ
を差し込んだホーク脚の肩部を外周より適当な加
熱装置によつて加熱し、スリーブの嵌合部と、ホ
ーク脚の肩部とを図示の６，７の如く溶着させ、
同時にステムのネジ部８に螺合したスリーブのネ
ジ部９を、ねじ戻しがきかないように歪ませて一
体化させ、ステムを堅固にホーク脚の肩部に固着
するのである。 The structure of the present invention will be explained with reference to the embodiment shown in the drawings. 1 is a front fork leg made of light alloy, and shoulder part 2 is
Insertion holes 10, 10 for attaching the stem 3 are provided in the center of the hawk leg, and a light alloy sleeve 4 with the base end of the steel stem 3 screwed into the insertion hole is fitted into the insertion hole. The shoulder part of the sleeve is heated from the outer periphery using a suitable heating device, and the fitting part of the sleeve and the shoulder part of the hawk leg are welded together as shown in 6 and 7 in the figure.
At the same time, the threaded part 9 of the sleeve screwed into the threaded part 8 of the stem is distorted so that it cannot be unscrewed and integrated, thereby firmly fixing the stem to the shoulder part of the hawk leg.
本考案は、前述のようにスリーブ溶着時の熱に
よつてステムを螺合したスリーブのネジ部の変形
によつてステムをホーク脚の肩部に一体に取付け
ることができるのである。 According to the present invention, the stem can be integrally attached to the shoulder of the hawk leg by deforming the threaded portion of the sleeve into which the stem is screwed together due to the heat generated during sleeve welding, as described above.
ここでさらにステムとスリーブとの螺合部に側
方よりノツクピン５を打込むことによつてステム
とスリーブとの固着を補強することができるもの
である。 Further, by driving a dowel pin 5 from the side into the threaded joint between the stem and the sleeve, the fixation between the stem and the sleeve can be reinforced.
以上、従来技術による接着剤を使用してステム
を前ホーク脚の肩部に接着剤で取付ける場合の不
安は上記本考案の技術によれば問題なく解消さ
れ、軽金属製自転車の特徴を遺憾なく発揮させる
ことができる効果がある。 As described above, the concerns associated with attaching the stem to the shoulders of the front fork legs using adhesive according to the prior art are resolved without any problems using the technology of the present invention, and the characteristics of a light metal bicycle are fully exhibited. There is an effect that can be used.
図面は本考案の実施例を示すものであつて第１
図は本考案前ホーク要部の一部切欠き正面図、第
２図はステム単体一部省略断面正面図、第３図は
スリーブ単体の半截断面正面図、第４図は軽合金
製前ホーク肩部の正面図である。
１……前ホーク脚、２……肩部、３……ステ
ム、４……スリーブ、５……ノツクピン、６，７
……溶接部、８，９……ネジ部、１０……差込
孔。
The drawings show an embodiment of the present invention and are shown in the drawings.
The figure is a partially cutaway front view of the main parts of the hawk before the invention, Figure 2 is a partially omitted cross-sectional front view of the stem alone, Figure 3 is a half-cut front view of the sleeve alone, and Figure 4 is the light alloy front fork. It is a front view of a shoulder part. 1...Front Hawk leg, 2...Shoulder, 3...Stem, 4...Sleeve, 5...Knock pin, 6,7
...Welded part, 8, 9... Threaded part, 10... Insertion hole.
Claims (1)
を軽金属製スリーブを介して取付ける装置に於
て、ステムの基部をスリーブに螺合させ、スリ
ーブを前ホーク脚の肩部に設けた連結孔に嵌合
し、この嵌合部を溶接により前ホーク脚の肩部
に溶着する際、溶接時の加熱を利用してステム
と螺合させるスリーブのネジ部を歪ませ、ステ
ムを前ホークに固着することを特徴とする自転
車前ホーク。 (2) スリーブとステムとの螺合部に、側方よりノ
ツクピンを打込んで、ステムとスリーブの固着
を補強したことを特徴とする前記登録請求の範
囲第１項記載の自転車前ホーク。[Claims for Utility Model Registration] (1) In a device for attaching a steel stem to the shoulder of a light metal front fork leg through a light metal sleeve, the base of the stem is screwed into the sleeve, and the sleeve is attached to the front of the fork leg. A threaded part of the sleeve that fits into the connecting hole provided in the shoulder of the hawk leg, and when this fitting part is welded to the shoulder of the front hawk leg, the threaded part of the sleeve is screwed into the stem using the heat generated during welding. A bicycle front hawk characterized by distorting the stem and fixing the stem to the front hawk. (2) The bicycle front hawk according to claim 1, characterized in that a dowel pin is driven from the side into the threaded joint between the sleeve and the stem to reinforce the adhesion between the stem and the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19746885U JPH0343117Y2 (en) | 1985-12-24 | 1985-12-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19746885U JPH0343117Y2 (en) | 1985-12-24 | 1985-12-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62105089U JPS62105089U (en) | 1987-07-04 |
| JPH0343117Y2 true JPH0343117Y2 (en) | 1991-09-10 |
Family
ID=31157234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19746885U Expired JPH0343117Y2 (en) | 1985-12-24 | 1985-12-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0343117Y2 (en) |
-
1985
- 1985-12-24 JP JP19746885U patent/JPH0343117Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62105089U (en) | 1987-07-04 |
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