JPH022713Y2 - - Google Patents
Info
- Publication number
- JPH022713Y2 JPH022713Y2 JP3422685U JP3422685U JPH022713Y2 JP H022713 Y2 JPH022713 Y2 JP H022713Y2 JP 3422685 U JP3422685 U JP 3422685U JP 3422685 U JP3422685 U JP 3422685U JP H022713 Y2 JPH022713 Y2 JP H022713Y2
- Authority
- JP
- Japan
- Prior art keywords
- guard plate
- drive gear
- chain
- elastic material
- guard
- 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
- 239000013013 elastic material Substances 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229920001875 Ebonite Polymers 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は、チエーンケースを設けない自転
車、主としてトライアル競技用自転車における、
駆動用ギアーガード装置に関するものである。[Detailed description of the invention] (Field of industrial application) This invention is applicable to bicycles without a chain case, mainly bicycles for trial competitions.
This invention relates to a drive gear guard device.
（従来の技術）
トライアル競技用自転車は競技に適するように
できる限り軽量化されており、このため一般の自
転車のようにチエーンはチエーンケースに収容さ
れていない。(Prior Art) Bicycles for trial competitions are made as light as possible to be suitable for competitions, and for this reason, the chain is not housed in a chain case like in general bicycles.
しかし、凹凸のある悪路を走行するような場
合、チエーンケースがないと、路面がチエーンと
接触してギアー或いはフレームを損傷することが
ある。 However, when driving on rough, uneven roads, if there is no chain case, the road surface may come into contact with the chain and damage the gears or frame.
これに対して、本願考案者等は先に、チエーン
ケースを設けないトライアル競技用等の自転車に
おいてハンガー部の下方に駆動ギアー保護用のガ
ード板を設けるようにした駆動ギアーガード装置
を提案した（実願昭58−175501号、実開昭60−
84383号公報）。 In response to this, the inventors of the present application previously proposed a drive gear guard device in which a guard plate for protecting the drive gear is provided below the hanger part of bicycles for trial competitions, etc., which do not have a chain case (in practice). Application No. 175501, 1986, Utility Model No. 175501
Publication No. 84383).
（考案が解決しようとする問題点）
しかし、このガード装置においてはガード板は
下パイプとチエーンステーに設けられたフツクに
その前端と後端を固定させているだけであるた
め、ガード板が路面と接触して突上げられると、
ガード板が凹んだり、フツクの下パイプ或いはチ
エーンステーとの溶接固定部分が損傷を受けたり
する。このため、従来は第５図に示すようにガー
ド板ａの両側に補強板ｂ，ｂを設け、該補強板
ｂ，ｂの上端部を下パイプｃに溶接固定する等の
方法が採られていたが、この場合はガード板ａが
路面と接触して突上げられると、補強板ｂ，ｂの
下パイプｃ溶接固定部分が損傷を受けるという不
都合が生ずる。(Problem that the invention aims to solve) However, in this guard device, the guard plate only has its front and rear ends fixed to the hooks provided on the lower pipe and chain stay, so the guard plate does not touch the road surface. When it comes into contact with and is pushed up,
The guard plate may become dented, or the welded and fixed part of the hook to the lower pipe or chain stay may be damaged. For this reason, conventional methods have been adopted, such as providing reinforcing plates b and b on both sides of guard plate a and welding and fixing the upper ends of the reinforcing plates b and b to the lower pipe c, as shown in Fig. 5. However, in this case, if the guard plate a comes into contact with the road surface and is pushed up, the welded portions of the reinforcing plates b and the lower pipe c of b will be damaged.
（問題点を解決するための手段）
以上の問題点を解決するために、この考案では
ハンガー部の下方に駆動ギアー保護用のガード板
を設けるとともに、ハンガー部とガード板の間に
弾性材を介在させるようにした自転車の駆動ギア
ーガード装置を提案するものである。(Means for solving the problem) In order to solve the above problems, in this invention, a guard plate is provided below the hanger part to protect the drive gear, and an elastic material is interposed between the hanger part and the guard plate. The present invention proposes a bicycle drive gear guard device as described above.
（作用）
即ち、この考案においてはガード板が路面と接
触して突上げられてもハンガー部とガード板の間
に介在させた弾性材の作用によりガード板が反発
するため、ガード板が凹んだり、或いは下パイ
プ、チエーンステーとの溶接部分の損傷を防止す
ることができる。(Function) In other words, in this invention, even if the guard plate comes into contact with the road surface and is pushed up, the guard plate rebounds due to the action of the elastic material interposed between the hanger part and the guard plate, so the guard plate may become depressed or Damage to the welded part with the lower pipe and chain stay can be prevented.
（実施例）
以下、この考案を図示の実施例に基づいて説明
すると、１は、この考案の一実施例を示すトライ
アル競技用自転車あつて、車体の立パイプ２の下
端にはハンガー部３が設けられている。また、ヘ
ツドパイプ４と、立パイプ２の中間部の間並びに
ハンガー部３の間には立パイプ５並びに下パイプ
６が設けられている。更に、立パイプ２の中端部
後側にはバツクホーク７、ハンガー部３の後側に
はチエーンステー８、バツクホーク７とチエーン
ステー８の後端部には後輪の車軸９を挾持するバ
ツク爪１０がそれぞれ設けられている。(Embodiment) This invention will be explained below based on the illustrated embodiment. 1 is a trial competition bicycle showing an embodiment of this invention, and a hanger portion 3 is provided at the lower end of a vertical pipe 2 of the body. It is provided. Further, a vertical pipe 5 and a lower pipe 6 are provided between the head pipe 4 and the intermediate portion of the vertical pipe 2 and between the hanger portion 3. Further, a back hawk 7 is provided on the rear side of the middle end of the vertical pipe 2, a chain stay 8 is provided on the rear side of the hanger portion 3, and a back pawl for holding the axle 9 of the rear wheel is provided at the rear ends of the back hawk 7 and the chain stay 8. 10 are provided respectively.
また、ハンガー部３には駆動ギアー１１が回動
自在に設けられ、該駆動ギアー１１と車軸９に設
けられたギアー１２との間には無端状のチエーン
１３が掛られ、駆動ギアー１１の中心にはペタル
１４の軸１５が固定されている。 Further, a drive gear 11 is rotatably provided on the hanger portion 3 , and an endless chain 13 is hung between the drive gear 11 and a gear 12 provided on the axle 9 . A shaft 15 of a petal 14 is fixed to.
一方、ハンガー部３の下方には弾性材１６を介
在させてガード板１７が設けられる。ガード板１
７は、下方に湾曲した比較的長尺な部材で構成さ
れ、その両側を上向き折曲げて内部に溝１７ａを
形成するとともに、底部前側には孔１７ｂ、後側
には孔１７ｃ，１７ｃ、中間部には孔１７ｄがそ
れぞれ設けられ、下パイプ６並びにチエーンステ
ー８に溶接固定されたフツク１８，１９に対して
孔１７ｂ、孔１７ｃ，１７ｃをビス止めして固定
されている。 On the other hand, a guard plate 17 is provided below the hanger portion 3 with an elastic material 16 interposed therebetween. Guard plate 1
7 is composed of a relatively elongated member curved downward, with both sides bent upward to form a groove 17a inside, a hole 17b on the front side of the bottom, holes 17c, 17c on the rear side, and a hole 17a in the middle. Holes 17d are provided in each portion, and the holes 17b and 17c are fixed to hooks 18 and 19 welded to the lower pipe 6 and the chain stay 8 by screws.
弾性材１６は、この実施例ではガード板１７よ
り短目な硬質ゴム等の材質の長尺部材で構成さ
れ、その長手方向の内側にはハンガー部３の周縁
に適合する湾曲面１６ａを形成し、外側にはガー
ド板１７の内側に適合する湾曲面１６ｂを形成
し、該湾曲面１６ｂの適当な位置に穴１６ｃを設
けてある。そして、弾性材１６は外側を上記ガー
ド板の溝１７ａに嵌合し、湾曲面１６ａをハンガ
ー部３の外周に当接するようにしてガード板１７
とハンガー部３の間に介在させるとともに、孔１
７ｄ、穴１６ｃをビス止めしてガード板１７に固
定されている。 In this embodiment, the elastic member 16 is composed of a long member made of hard rubber or the like, which is shorter than the guard plate 17, and has a curved surface 16a that fits the periphery of the hanger portion 3 on the inside in the longitudinal direction. A curved surface 16b that fits inside the guard plate 17 is formed on the outside, and holes 16c are provided at appropriate positions on the curved surface 16b. Then, the outer side of the elastic material 16 is fitted into the groove 17a of the guard plate, and the curved surface 16a is brought into contact with the outer periphery of the hanger part 3 to form the guard plate 17.
and the hanger part 3, and the hole 1
7d and the hole 16c are fixed to the guard plate 17 with screws.
この考案は、以上のように構成され、駆動ギア
ー１１の下方にはガード板１７が配置されている
ため、トライアル競技中凹凸ある悪路を走行して
もチエーン１３が路面と接触することなく、また
ガード板１７とハンガー部３との間に弾性材１６
を介在させているため、ガード板１７が路面と接
触して突上げられても弾性材１６の弾性で反発し
てガード板１７の凹みを防止することができる。
また、弾性材１６の弾性でフツク１８，１９と下
パイプ６、チエーンステー８の溶接部分に加わる
力が和らげられ、この部分の損傷を防ぐことがで
きる。 This invention is constructed as described above, and since the guard plate 17 is arranged below the drive gear 11, the chain 13 does not come into contact with the road surface even when driving on a rough, uneven road during a trial competition. Moreover, an elastic material 16 is provided between the guard plate 17 and the hanger portion 3.
Since the guard plate 17 is interposed therebetween, even if the guard plate 17 comes into contact with the road surface and is pushed up, the elasticity of the elastic member 16 will rebound and prevent the guard plate 17 from being dented.
Further, the elasticity of the elastic material 16 relieves the force applied to the welded portions of the hooks 18, 19, the lower pipe 6, and the chain stay 8, thereby preventing damage to these portions.
なお、この実施例ではガード板１７の一部に弾
性材１６を沿設する例を述べたが、勿論ガード板
１７の全部に弾性材１６を沿設するするようにし
てもよい。 Although this embodiment describes an example in which the elastic material 16 is provided along a part of the guard plate 17, it is of course possible to provide the elastic material 16 along the entire guard plate 17.
（考案の効果）
以上要するに、この考案によれば極めて簡単な
構造で、チエーンケースを設けないトライアル競
技用自転車等におけるチエーンと路面の接触を防
止でき、またガード板の路面と接触する際の凹
み、或いはガード板の取付け部分の損傷を防止す
ることができる。(Effects of the invention) In summary, according to this invention, with an extremely simple structure, it is possible to prevent contact between the chain and the road surface in bicycles for trial competitions, etc., which do not have a chain case, and to prevent dents in the guard plate when it comes into contact with the road surface. Alternatively, damage to the mounting portion of the guard plate can be prevented.
第１図は、この考案の一実施例を示すトライア
ル競技用自転車の側面図、第２図は、同上の要部
拡大図、第３図は、ガード板を示すもので、第３
図Ａはその平面図、第３図Ｂは側面図、第３図Ｃ
は正面図、第４図は、弾性材を示すもので、第４
図Ａはその側面図、第４図Ｂは正面図、第５図は
従来の駆動ギアーガード装置を示す側面図であ
る。
図中、３はハンガー部、１１は駆動ギアー、１
６は弾性材、１７はガード板。
Fig. 1 is a side view of a trial bicycle showing an embodiment of this invention, Fig. 2 is an enlarged view of the same essential parts, and Fig. 3 shows a guard plate.
Figure A is a plan view, Figure 3 B is a side view, Figure 3 C
is a front view, and Figure 4 shows the elastic material.
Figure A is a side view thereof, Figure 4B is a front view, and Figure 5 is a side view showing a conventional drive gear guard device. In the figure, 3 is a hanger part, 11 is a drive gear, 1
6 is an elastic material, and 17 is a guard plate.
Claims (1)
ンガー部の下方に駆動ギアー保護用のガード板を
設けるとともに、ハンガー部とガード板の間に弾
性材を介在させたことを特徴とする自転車の駆動
ギアーガード装置。 A bicycle drive gear guard device for a bicycle without a chain case, characterized in that a guard plate for protecting the drive gear is provided below the hanger part, and an elastic material is interposed between the hanger part and the guard plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3422685U JPH022713Y2 (en) | 1985-03-12 | 1985-03-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3422685U JPH022713Y2 (en) | 1985-03-12 | 1985-03-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61150277U JPS61150277U (en) | 1986-09-17 |
| JPH022713Y2 true JPH022713Y2 (en) | 1990-01-23 |
Family
ID=30537401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3422685U Expired JPH022713Y2 (en) | 1985-03-12 | 1985-03-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH022713Y2 (en) |
-
1985
- 1985-03-12 JP JP3422685U patent/JPH022713Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61150277U (en) | 1986-09-17 |
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