JPH0322070Y2 - - Google Patents
Info
- Publication number
- JPH0322070Y2 JPH0322070Y2 JP1986106216U JP10621686U JPH0322070Y2 JP H0322070 Y2 JPH0322070 Y2 JP H0322070Y2 JP 1986106216 U JP1986106216 U JP 1986106216U JP 10621686 U JP10621686 U JP 10621686U JP H0322070 Y2 JPH0322070 Y2 JP H0322070Y2
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- link
- pair
- adjusting
- members
- 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
- 239000003566 sealing material Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Axle Suspensions And Sidecars For Cycles (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
【考案の詳細な説明】
(産業上の利用分野)
本考案は自転車用フロントデイレーラーに関す
る。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a bicycle front derailleur.
(従来の技術)
一般に、此種フロントデイレーラーは、実公昭
57−39271号公報に記載されている通り、自転車
におけるフレームのシートチユーブに固定する固
定部材に一対のリンク部材を一対の枢支軸で連結
し、これらリンク部材に一対の枢支軸でチエンガ
イドをもつた可動部材を連結する一方、前記固定
部材に、前記リンク部材の揺動範囲を調整する一
対のアジヤストボルトを設けると共に、前記リン
ク部材の1つに前記アジヤストボルトと当接する
一対の当接部を設けて、一方のアジヤストボルト
と一方の当接部との当接により前記リンク部材の
揺動方向一方側への揺動範囲を規制し、また、他
方のアジヤストボルトと他方の当接部との当接に
より前記リンク部材の揺動方向他方側への揺動範
囲を規制する如く構成されている。(Prior art) Generally, this type of front derailleur is
As described in Publication No. 57-39271, a pair of link members are connected by a pair of pivot shafts to a fixed member fixed to the seat tube of a bicycle frame, and a chain guide is attached to these link members by a pair of pivot shafts. The fixed member is provided with a pair of adjustment bolts for adjusting the swing range of the link member, and one of the link members is provided with a pair of adjustment bolts that abut the adjustment bolt. A contact portion is provided, and the swing range of the link member in the swing direction is restricted by the contact between one adjusting bolt and the one contact portion, and the swing range of the link member to one side in the swing direction is restricted. The swinging range of the link member to the other side in the swinging direction is restricted by contact with the contacting portion of the link member.
(考案が解決しようとする問題点)
所が、以上の如く構成されたフロントデイレー
ラーにおける前記アジヤストボルトの先端部及び
当接部は、隠蔽されることなく外部に露出してい
るため、車輪の回転により跳ね飛ばされた泥土
が、前記アジヤストボルトと前記当接部との当接
部分に付着して泥詰りとなり、その結果、アジヤ
ストボルトによる調整が適正であつても、前記リ
ンク部材の揺動範囲が狂い、変速性が悪くなる問
題があつた。(Problem to be Solved by the Invention) However, in the front derailleur configured as described above, the tips and contact portions of the adjustment bolts are not hidden and are exposed to the outside, The mud thrown off by the rotation of the link member adheres to the contact portion between the adjusting bolt and the contact portion, resulting in mud clogging, and as a result, even if the adjusting bolt is properly adjusted, the link member There was a problem that the oscillation range was out of order and the shifting performance became poor.
本考案の目的は、特別の隠蔽部材を用いること
なく、前記アジヤストボルトと当接部との当接部
分を隠蔽できるようにするものである。 An object of the present invention is to make it possible to hide the contact portion between the adjustment bolt and the contact portion without using a special concealment member.
(問題点を解決するための手段)
しかして、本考案は固定部材2に一対のリンク
部材5,6を一対の枢支軸3,4で連結し、これ
らリンク部材5,6に一対の枢支軸7,8でチエ
ンガイド9をもつた可動部材10を連結すると共
に、前記固定部材2又は前記可動部材10と、前
記リンク部材5又は6との一方に、前記リンク部
材5,6の揺動範囲を調整する一対のアジヤスト
ボルト12,13を設け、他方に、これらアジヤ
ストボルト12,13と当接する当接部14,1
5を設けて成るフロントデイレーラーにおいて、
前記アジヤストボルト12,13を設ける一方の
部材における枢支軸周りに、前記リンク部材の揺
動中心線と同方向に延び、前記当接部14,15
を設ける他方の部材に対向する対向面に開口する
空洞51を設けて、前記アジヤストボルト12,
13の先端部を前記空洞51内に臨ませると共
に、前記当接部14,15を設ける他方の部材
に、前記空洞51内に突入し、かつ、前記空洞5
1内で相対回転可能な受体21を設け、この受体
21に前記当接部14,15を設けたものであ
る。(Means for Solving the Problems) Accordingly, the present invention connects a pair of link members 5 and 6 to a fixed member 2 with a pair of pivot shafts 3 and 4, and connects a pair of link members 5 and 6 to a pair of pivot shafts 3 and 4. A movable member 10 having a chain guide 9 is connected by the support shafts 7 and 8, and a swinging member of the link members 5 and 6 is attached to one of the fixed member 2 or the movable member 10 and the link member 5 or 6. A pair of adjuster bolts 12 and 13 are provided to adjust the range of motion, and the other is provided with abutting portions 14 and 1 that come into contact with these adjuster bolts 12 and 13.
In the front derailleur provided with 5,
The abutting portions 14, 15 extend in the same direction as the swing center line of the link member around the pivot shaft of one of the members on which the adjusting bolts 12, 13 are provided.
The adjusting bolt 12,
13 facing into the cavity 51, the other member provided with the abutting parts 14 and 15 protrudes into the cavity 51, and the cavity 5
A receiving body 21 that is relatively rotatable within the receiving body 1 is provided, and the abutting portions 14 and 15 are provided on this receiving body 21.
(作 用)
前記リンク部材5,6の固定部材2との連結
時、又は、前記可動部材10のリンク部材5,6
との連結時、受体21を空洞51内に差込むこと
により、この空洞51の開放口を、前記受体21
を設けた部材の、前記アジヤストボルト12,1
3を設けた部材との対向面によつて閉鎖し得るの
で、アジヤストボルト12,13と当接部14,
15との当接部分を隠蔽することができるのであ
る。(Function) When the link members 5 and 6 are connected to the fixed member 2, or when the link members 5 and 6 of the movable member 10 are connected,
By inserting the receptor 21 into the cavity 51, the opening of the cavity 51 is connected to the receptor 21.
The adjusting bolt 12, 1 of the member provided with
3, the adjustment bolts 12, 13 and the contact portion 14,
15 can be hidden.
(実施例)
図示したフロントデイレーラーは、自転車のシ
ートチユーブに締付バンド1を介して固定する固
定部材2と、該固定部材2に一対の枢支軸3,4
で連結する一対の第1及び第1リンク部材5,6
及びこれらリンク部材5,6の遊端部に一対の枢
支軸7,8で連結するチエンガイド9をもつた可
動部材10とから成るリンク機構Aを備え、前記
第2リンク部材6と可動部材10との間にリター
ンばね11を介装して前記チエンガイド9を多段
フロントギヤの小径ギヤ側に付勢する一方、前記
第1リンク部材5に、該第1リンク部材5及び前
記第2リンク部材6の揺動範囲を調整する一対の
アジヤストボルト12,13を設けると共に、前
記固定部材2に、前記アジヤストボルト12,1
3と当接する一対の当接部14,15を前記第1
リンク部材5の揺動方向に所定間隔を置いて設
け、前記アジヤストボルト12,13の調節によ
り前記第1リンク部材5の揺動範囲、ひいては前
記チエンガイド9の揺動範囲を規制するようにし
ている。(Embodiment) The illustrated front derailleur includes a fixing member 2 that is fixed to the seat tube of a bicycle via a tightening band 1, and a pair of pivot shafts 3 and 4 attached to the fixing member 2.
a pair of first and first link members 5, 6 connected by
and a movable member 10 having a chain guide 9 connected to the free ends of the link members 5, 6 by a pair of pivot shafts 7, 8, the second link member 6 and the movable member A return spring 11 is interposed between the first link member 5 and the second link to bias the chain guide 9 toward the small diameter gear of the multi-stage front gear. A pair of adjusting bolts 12 and 13 are provided for adjusting the swing range of the member 6, and the adjusting bolts 12 and 13 are provided on the fixed member 2.
The pair of contact portions 14 and 15 that contact the first
They are provided at a predetermined interval in the swinging direction of the link member 5, and the swinging range of the first link member 5 and, by extension, the swinging range of the chain guide 9 is regulated by adjusting the adjusting bolts 12 and 13. ing.
又、前記第1リンク部材5の基端部に、操作ワ
イヤと該ワイヤを案内するアウター筒とから成る
操作索における前記ワイヤを支持する支持部16
aをもつた支持腕16を一体に設けて、前記ワイ
ヤの牽引操作により前記リンク機構Aを変形させ
て、前記チエンガイド9を多段フロントギヤの軸
方向で、大径ギヤ側に往動させ、また、前記ワイ
ヤの弛緩操作により前記チエンガイドを、前記リ
ターンばね11の復元力で小径ギヤ側に復動させ
るようにしている。。 Further, at the proximal end of the first link member 5, there is provided a support portion 16 for supporting the wire in the operating cable consisting of an operating wire and an outer tube for guiding the wire.
A support arm 16 having a diameter A is integrally provided, and the link mechanism A is deformed by pulling the wire to move the chain guide 9 forward in the axial direction of the multi-stage front gear toward the large diameter gear, Further, by loosening the wire, the chain guide is moved back toward the small diameter gear by the restoring force of the return spring 11. .
しかして、第1〜第5図に示した実施例では、
前記アジヤストボルト12,13を設ける第1リ
ンク部材5における基端部の枢支軸3周りに、前
記第1リンク部材5の揺動中心線と同方向に延
び、前記当接部14,15を設ける固定部材2に
対向する対向面5aに開口する空洞51を設け
て、前記アジヤストボルト12,13の先端部を
前記空洞51内に臨ませると共に、前記当接部1
4,15を設ける固定部材2に、前記空洞51内
に突入し、かつ、前記空洞51内で相対回転可能
な受体21を設け、この受体21に前記当接部1
4,15を設けたのである。 However, in the embodiments shown in FIGS. 1 to 5,
The abutting portions 14, 15 extend in the same direction as the swing center line of the first link member 5 around the pivot shaft 3 at the proximal end of the first link member 5 on which the adjuster bolts 12, 13 are provided. A cavity 51 is provided that opens on the opposing surface 5a facing the fixing member 2 provided with the fixing member 2, so that the tips of the adjusting bolts 12 and 13 are faced into the cavity 51, and the abutment part 1
4 and 15 is provided with a receiver 21 that protrudes into the cavity 51 and is relatively rotatable within the cavity 51, and the receiver 21 is provided with the contact portion 1.
4,15 were established.
以上の構成において、前記空洞51は、前記第
1リンク部材5の成形時、例えば第1図の如く断
面半円形に成形するのであつて、この空洞51の
平担面部分に一対のねじ孔52,53を開口さ
せ、これらねじ孔52,53に螺合する前記アジ
ヤストボルト12,13の先端部を前記空洞51
内に臨ませるのである。又、前記ねじ孔52,5
3は、前記枢支軸3を中心として前記リンク部材
5の長さ方向に振分けている。 In the above configuration, when the first link member 5 is molded, the cavity 51 is formed to have a semicircular cross section as shown in FIG. , 53 are opened, and the tips of the adjusting bolts 12, 13 that are screwed into these screw holes 52, 53 are inserted into the cavity 51
Let it come within. Moreover, the screw holes 52, 5
3 is distributed in the length direction of the link member 5 with the pivot shaft 3 as the center.
又、前記空洞51の開放口は、前記第1リンク
部材5を固定部材2に連結したとき、前記固定部
材2の表面2aによつて閉鎖されるのであるが、
好ましくは、第2図の如くリング状のシール材1
7を設けて、前記空洞51における開放口の閉鎖
性を高める如く成すのが好ましい。尚、前記シー
ル材17は、合成樹脂から成り、その内周面に、
前記対向面5a及び表面2aとの間で軽く挾持す
る複数個の舌片17aを設けている。 Further, the opening of the cavity 51 is closed by the surface 2a of the fixing member 2 when the first link member 5 is connected to the fixing member 2.
Preferably, a ring-shaped sealing material 1 as shown in FIG.
7 is preferably provided to improve the closure of the opening in the cavity 51. Note that the sealing material 17 is made of synthetic resin, and has the following on its inner circumferential surface:
A plurality of tongue pieces 17a are provided which are lightly held between the opposing surface 5a and the surface 2a.
又、前記受体21及び当接部14,15は、前
記固定部材2の成形時、一体に成形するのであ
る。尚、前記受体21は別に形成して、前記固定
部材2に固定してもよい。 Furthermore, the receiver 21 and the contact portions 14 and 15 are integrally molded when the fixing member 2 is molded. Note that the receiver 21 may be formed separately and fixed to the fixing member 2.
又、前記枢支軸3,4は、その基端を前記固定
部材2にカシメ加工により固定し、遊端部を連結
体18で相互に連結している。 Further, the pivot shafts 3 and 4 have their base ends fixed to the fixing member 2 by caulking, and their free ends are interconnected by a connecting body 18.
尚、図中19,20,30はゴム製のOリング
である。 In addition, 19, 20, and 30 in the figure are rubber O-rings.
本考案は以上の如く構成するもので、第1リン
ク部材5を枢支軸3で固定部材2に連結すると
き、固定部材2に設けた受体21を、前記第1リ
ンク部材5に設けた空洞51内に差込むことによ
り、前記第1リンク部材5に設けたアジヤストボ
ルト12,13の先端部を、前記受体21に設け
た当接部14,15に対向させることができるの
であり、又、前記空洞51の開放口を、前記固定
受体2の表面2aによつて閉鎖することができる
のである。従つて、前記アジヤストボルト12,
13と当接部14,15との当接部分を、特別の
隠蔽部材を設けなくとも隠蔽することができるの
である。 The present invention is constructed as described above, and when the first link member 5 is connected to the fixed member 2 by the pivot shaft 3, the receiver 21 provided on the fixed member 2 is provided on the first link member 5. By inserting them into the cavity 51, the tips of the adjusting bolts 12, 13 provided on the first link member 5 can be opposed to the contact portions 14, 15 provided on the receiver 21. Furthermore, the opening of the cavity 51 can be closed by the surface 2a of the fixed receiver 2. Therefore, the adjusting bolt 12,
The contact portion between the contact portion 13 and the contact portions 14 and 15 can be hidden without providing a special concealment member.
尚、以上説明した実施例では、第1リンク部材
5にアジヤストボルト12,13を設け、固定部
材2に当接部14,15を設けたが、その反対に
設けてもよい。又、前記第2リンク部材6と固定
部材2との一方に前記アジヤストボルト12,1
3を設け、他方に前記当接部14,15を設けて
もよいし、又、前記可動部材10と、前記リンク
部材5又は6との一方に前記アジヤストボルト1
2,13を設け、他方に前記当接部14,15を
設けてもよいのである。 In the embodiment described above, the adjusting bolts 12, 13 are provided on the first link member 5, and the contact portions 14, 15 are provided on the fixed member 2, but they may be provided in the opposite manner. Further, the adjusting bolts 12, 1 are attached to one of the second link member 6 and the fixing member 2.
3, and the abutting parts 14, 15 may be provided on the other, or the adjusting bolt 1 may be provided on one of the movable member 10 and the link member 5 or 6.
2 and 13 may be provided, and the contact portions 14 and 15 may be provided on the other.
(考案の効果)
以上の如く本考案は、リンク部材5,6の揺動
範囲を調整する一対のアジヤストボルト12,1
3を設ける一方の部材における枢支軸周りに、前
記リンク部材の揺動中心線と同方向に延び、当接
部14,15を設ける他方の部材に対向する対向
面に開口する空洞51を設けて、前記アジヤスト
ボルト12,13の先端部を前記空洞51内に臨
ませると共に、前記当接部14,15を設ける他
方の部材に、前記空洞51内に突入し、かつ、前
記空洞51内で相対回転可能な受体21を設け、
この受体21に前記当接部14,15を設けたか
ら、前記リンク部材5,6の固定部材2との連結
時、又は、可動部材10の前記リンク部材5,6
との連結時、前記受体21を空洞51内に差込む
だけの非常に簡単な操作で、前記アジヤストボル
ト12,13の先端部を前記当接部14,15に
対向させることができて、しかも、前記空洞51
の開放口を、前記受体21を設けた部材によつて
閉鎖することができるので、前記アジヤストボル
ト12,13と当接部14,15との当接部分に
泥が詰るのを防ぐことができ、泥詰りによる変速
性の悪化をなくすることができるのである。(Effect of the invention) As described above, the invention provides a pair of adjuster bolts 12 and 1 for adjusting the swing range of the link members 5 and 6.
3, a cavity 51 is provided around the pivot axis in one of the members, which extends in the same direction as the center line of swing of the link member, and which opens on the opposing surface facing the other member, in which the abutting portions 14 and 15 are provided. Then, the tips of the adjusting bolts 12 and 13 are made to face the inside of the cavity 51, and the other member provided with the contact portions 14 and 15 is inserted into the cavity 51 and is inserted into the cavity 51. A receiver 21 that is relatively rotatable is provided,
Since the contact parts 14 and 15 are provided on the receiver 21, when the link members 5 and 6 are connected to the fixed member 2, or when the link members 5 and 6 of the movable member 10 are connected,
When connecting with, the tips of the adjusting bolts 12, 13 can be opposed to the contact parts 14, 15 by a very simple operation of just inserting the receiver 21 into the cavity 51. , and the cavity 51
Since the opening of the opening can be closed by the member provided with the receiver 21, it is possible to prevent mud from clogging the abutting portions between the adjusting bolts 12, 13 and the abutting portions 14, 15. This makes it possible to eliminate deterioration in shifting performance due to mud clogging.
しかも、特別の隠蔽部材が不要であるから、構
造を簡単にでき、それだけ泥詰りを防止できる割
りに加工及び組立性を良好にでき、コストを安く
できるのである。 Furthermore, since no special concealing member is required, the structure can be simplified, and while mud clogging can be prevented, processing and assembly can be improved, and costs can be reduced.
第1図は本考案フロントデイレーラーの一実施
例を示す要部のみの拡大正面図、第2図は同じく
拡大平面図、第3図は全体の側面図、第4図は同
正面図、第5図は同平面図である。
2……固定部材、3,4,7,8……枢支軸、
5,6……リンク部材、9……チエンガイド、1
0……可動部材、12,13……アジヤストボル
ト、14,15……当接部、21……受体、51
……空洞。
Fig. 1 is an enlarged front view of only the main parts showing one embodiment of the front derailleur of the present invention, Fig. 2 is an enlarged plan view, Fig. 3 is a side view of the whole, Fig. 4 is a front view of the same, and Fig. 4 is an enlarged front view of only the main parts. FIG. 5 is a plan view of the same. 2... Fixed member, 3, 4, 7, 8... Pivot shaft,
5, 6... Link member, 9... Chain guide, 1
0... Movable member, 12, 13... Adjustment bolt, 14, 15... Contact portion, 21... Receiver, 51
……cavity.
Claims (1)
枢支軸3,4で連結し、これらリンク部材5,6
に一対の枢支軸7,8でチエンガイド9をもつた
可動部材10を連結すると共に、前記固定部材2
又は前記可動部材10と、前記リンク部材5又は
6との一方に、前記リンク部材5,6の揺動範囲
を調整する一対のアジヤストボルト12,13を
設け、他方に、これらアジヤストボルト12,1
3と当接する当接部14,15を設けて成るフロ
ントデイレーラーにおいて、前記アジヤストボル
ト12,13を設ける一方の部材における枢支軸
周りに、前記リンク部材の揺動中心線と同方向に
延び、前記当接部14,15を設ける他方の部材
に対向する対向面に開口する空洞51を設けて、
前記アジヤストボルト12,13の先端部を前記
空洞51内に臨ませると共に、前記当接部14,
15を設ける他方の部材に、前記空洞51内に突
入し、かつ、前記空洞51内で相対回転可能な受
体21を設け、この受体21に前記当接部14,
15を設けたことを特徴とする自転車用フロント
デイレーラー。 A pair of link members 5 and 6 are connected to the fixed member 2 by a pair of pivot shafts 3 and 4, and these link members 5 and 6
A movable member 10 having a chain guide 9 is connected to the fixed member 2 by a pair of pivot shafts 7 and 8.
Alternatively, one of the movable member 10 and the link member 5 or 6 is provided with a pair of adjusting bolts 12 and 13 for adjusting the swing range of the link members 5 and 6, and the adjusting bolt 12 is provided on the other side. ,1
3, the adjusting bolts 12, 13 are arranged around the pivot shaft of one of the members, in the same direction as the center line of swing of the link member. A cavity 51 is provided that extends and opens on the opposing surface facing the other member in which the abutting portions 14 and 15 are provided,
The tips of the adjusting bolts 12 and 13 are made to face into the cavity 51, and the contact portions 14,
15 is provided with a receiver 21 that protrudes into the cavity 51 and is relatively rotatable within the cavity 51, and the contact portion 14,
A bicycle front derailleur characterized by having 15 parts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986106216U JPH0322070Y2 (en) | 1986-07-10 | 1986-07-10 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986106216U JPH0322070Y2 (en) | 1986-07-10 | 1986-07-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6312495U JPS6312495U (en) | 1988-01-27 |
JPH0322070Y2 true JPH0322070Y2 (en) | 1991-05-14 |
Family
ID=30981367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986106216U Expired JPH0322070Y2 (en) | 1986-07-10 | 1986-07-10 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0322070Y2 (en) |
-
1986
- 1986-07-10 JP JP1986106216U patent/JPH0322070Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6312495U (en) | 1988-01-27 |
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