FR2621968A3 - Protection element for front derailleur of bicycles or similar vehicles - Google Patents

Protection element for front derailleur of bicycles or similar vehicles Download PDF

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Publication number
FR2621968A3
FR2621968A3 FR8714743A FR8714743A FR2621968A3 FR 2621968 A3 FR2621968 A3 FR 2621968A3 FR 8714743 A FR8714743 A FR 8714743A FR 8714743 A FR8714743 A FR 8714743A FR 2621968 A3 FR2621968 A3 FR 2621968A3
Authority
FR
France
Prior art keywords
fork
element according
pad
shoe
bicycles
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.)
Granted
Application number
FR8714743A
Other languages
French (fr)
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FR2621968B3 (en
Inventor
Henri Juy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Simplex SA
Original Assignee
Simplex SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Simplex SA filed Critical Simplex SA
Priority to FR8714743A priority Critical patent/FR2621968B3/en
Publication of FR2621968A3 publication Critical patent/FR2621968A3/en
Application granted granted Critical
Publication of FR2621968B3 publication Critical patent/FR2621968B3/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/131—Front derailleurs
    • B62M9/136—Chain guides; Mounting thereof

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)

Abstract

The subject of the invention relates to the technical field of accessories for cycles. The element is made up of a pad 1 whose overall shape very substantially corresponds to that of the inner fork F and has arrangements so as to be fitted dismantlably onto the said fork and to cover the internal part of the latter, on the chain side.

Description

Elément de protection pour dérailleur avant de bicy dettes ou véhicules similaires. Protective element for front derailleur of bicy debts or similar vehicles.

L3objet de 1 invention se rattache au secteur technique des accessoires pour cycles. The subject of the invention relates to the technical field of cycle accessories.

Les dérailleurs avant de bicyclettes sont notoirement connus et présentent pour loessentiel une chape composée de de fourchettes parallèles en métal et assujetties à un mécanisme de commande pour être déplacées en vue d'assurer le passage de la channe dSun plateau de diamètre inférieur au plateau de diamètre supérieur et inversement. Diff.rents mécanismes ont été proposés pour atteindre ce résultat. Bicycle front derailleurs are notoriously known and have a clevis essentially made up of parallel metal forks which are controlled by a control mechanism to be moved in order to ensure the passage of the chain from a plate of smaller diameter than the diameter plate. higher and vice versa. Various mechanisms have been proposed to achieve this result.

Selon le positionnement de la chaine sur les pignons arrière, il est très fréquent que la chaine frotte sur lUune des fourrhettes de la chape ce qui engendre un bruit désagréable qui peut éventuellement étire diminué en obligeant I utilisateur d'agir sur son dérailleur avant pour tenter de positionner correctement le fsurchette. On conçoit que cette opération est dElica- te, avec un résultat très aléatoire. Depending on the position of the chain on the rear gears, it is very common for the chain rubs on one of the scabbards of the screed which generates an unpleasant noise that can eventually be decreased by requiring the user to act on his derailleur before to try to correctly position the fsurette. It is understandable that this operation is difficult, with a very random result.

Outre le bruit engendré, le frottement de la channe provoque une usure prématurée notamment de la fourchette interne susceptible d'obliger l'utilisateur à changer la totalité de son dérailleur
Un autre inconvénient apparat au niveau du passage de la channe du petit plateau au plateau supérieur qui peut s'avérer parfois délicat en fonction de la différence de dentures des deux plateaux ou d'un mauvais réglage du dérailleur.In addition to the noise generated, the friction of the channe causes premature wear including the internal range may require the user to change the entire derailleur
Another disadvantage arises in the passage of the channe small tray to the upper plate which can sometimes be difficult depending on the difference of teeth of the two trays or a bad adjustment of the derailleur.

L'invention s'est fixée pour but de remédier à ces inconvénients d'une manière simple, efficace et économique en mettant au point un patin de protection réalisé notamment en résine acétale et qui est remarquable en ce qu'il présente des agencements pour être adapté d'une manière démontable sur ladite fourchette et recouvrir la partie interne de cette dernière, du côté de la chaine. The aim of the invention is to overcome these drawbacks in a simple, efficient and economical manner by developing a protective pad made in particular of acetal resin and which is remarkable in that it has arrangements for being adapted in a removable manner on said fork and cover the inner part of the latter, the side of the chain.

Suivant une autre caractéristique, la face interne du patin présente au niveau de la base et de la partie avant une rampe profilée conformée pour faciliter le passage de la channe du plateau de diamètre inférieur au plateau de diamètre 5.tp6- rieur. According to another feature, the inner face of the shoe has at the base and the front part a profiled ramp shaped to facilitate the passage of the channe of the plate of smaller diameter than the plateau diameter 5.tpérieur.

L'invention est exposée ci-après plus en détail à laide des dessins annexés dans lesquels
- les figures 1 et 2 sont des vues en perspective du patin, respectivement du coté interne et du coté externe.The invention is explained below in more detail using the accompanying drawings in which
- Figures 1 and 2 are perspective views of the pad, respectively the inner side and the outer side.

- les figures Z et 4 illustrent en perspective, l'adaptation du patin sur le dérailleur avant,
- la figure 5 est une vue en coupe transversale à plus grande échelle considérée selon la ligne 5.5. de la figure
Rfin de rendre plus concret l'objet de l'invention, on le décrit maintenant dune manière non limitative en se réfé- rant aux exemples de réalisation des figures des dessins.- Figures Z and 4 illustrate in perspective, the adaptation of the pad on the front derailleur,
- Figure 5 is a cross-sectional view on a larger scale considered according to line 5.5. of the figure
In order to make the object of the invention more concrete, it is now described in a nonlimiting manner with reference to the exemplary embodiments of the figures of the drawings.

Le patin de protection désigné dans son ensemble par (1) a une +orme générale correspondant très sensiblement à celle de la fourchette interne (F) de la chape (C) du dérailleur avant CD). Ce patin est réalisé en matière plastique, armée ou non, du type résine acétale. The protective pad designated as a whole by (1) has a general elm corresponding very substantially to that of the inner fork (F) of the yoke (C) of the front derailleur CD). This pad is made of plastic material, armed or not, of the acetal resin type.

Selon invention, la partie avant du patin (1) et sa partie arrière, présentent des agencements conformés pour permettre l'adaptation dudit patin sur la fourchette (F) et recouvrir la partie interne de cette dernière. Dans ce but, la partie avant du patin (1) présente dans son épaisseur, un fourreau (la) avec une fente profilée (lal) d'introduction, apte à permettre l'engagement de l'extrémité avant de la fourchette interne. 4 l'arrière le patin (1) présente un trou (lb) pour coopérer avec l'axe entretoise (C1) des fourchettes de la chape. Le fourreau (la) est obtenu directement lors du moulaqe du corps du patin et présente une épaisseur réduite. According to the invention, the front portion of the shoe (1) and its rear portion, have arrangements shaped to allow the adaptation of said pad on the fork (F) and cover the inner part thereof. For this purpose, the front portion of the shoe (1) has in its thickness, a sleeve (la) with a profiled slot (lal) introduction, adapted to allow the engagement of the front end of the inner fork. 4 back the pad (1) has a hole (lb) to cooperate with the spacer shaft (C1) of the forks of the yoke. The sheath (la) is obtained directly during the molding of the body of the pad and has a reduced thickness.

Après montage du patin (1) sur la fourchette interne (F), par engagement du fourreau (la) en bout de ladite fourchet te et introduction du trou (nib) sur l'axe (Ci), ledit patin (1) recouvre la totalité de la face interne de la fourchette (F) (figures r et 4). After mounting the shoe (1) on the inner fork (F), by engaging the sheath (la) at the end of said forking te and introduction of the hole (nib) on the axis (Ci), said shoe (1) covers the all of the inner face of the fork (F) (Figures r and 4).

Dans ces conditions, il apparait que la chape lors d'une manoeuvre sur le dérailleur avant et/ou arrière ne sera pas en contact direct avec la face interne de la fourchette (F > mais avec le patin. Compte-tenu de la nature du matériau composant ce patin (1), il suffit de le changer sans pour cela autre obligé de changer l'ensemble du dérailleur avant. Under these conditions, it appears that the yoke during a maneuver on the front and / or rear derailleur will not be in direct contact with the inner face of the fork (F> but with the pad. material component of this pad (1), just change it without the other to change the entire front derailleur.

Suivant une autre caractéristique importante, la face interne du fourreau (1), située du c8té de la chaine, présente 3 sa base et du coté de son extrémité avant, une rampe profilée (Ic). Cette rampe (ic) qui constitue un niveau très légèrement dÇcalX en hauteur par rapport au plan défini par la face interne du patin, est déterminéepour faciliter le passage de la chaine du petit plateau au plateau supérieur en ayant tendance à "por- ter" la channe sur la denture du plateau supérieur. According to another important feature, the inner face of the sheath (1), located on the side of the chain, has 3 its base and the side of its front end, a profiled ramp (Ic). This ramp (ic) which constitutes a level very slightly in height with respect to the plane defined by the inner face of the pad, is determined to facilitate the passage of the chain of the small plate to the upper plate while tending to "carry" the sings on the teeth of the upper plate.

Les avantages ressortent bien de la description. En particuliers on souligne et on rappelle
- la diminution importante du bruit dans le cas ou la channe à tendance à frotter sur la fourchette de la chappe,
- la suppression de l'usure de la fourchette,
- l'amélioration du passage de la chape du plateau de diamètre inférieur au plateau de diamètre supérieur. The advantages are apparent from the description. In particular we emphasize and remember
- the significant reduction of the noise in the case where the channe tends to rub on the fork of the chappe,
- the suppression of the wear of the fork,
- Improvement of the passage of the screed of the lower diameter plate to the upper diameter plate.

Claims (5)

REVENDICATIONS - 1 - Elément de protection pour dérailleur avant de bicyclettes ou véhicules similaires comprenant une chape avec deux fourchettes parallèles entretoisées par un axe a leurs parties arrière, lesdites fourchettes étant assujetties à un système de commande, caractérisé en ce qu'il est constitué par un patin (1) d'une forme générale correspondant très sensiblement à celle de la fourchette intérieure (F) et présentant des agencements pour être adapté d'une manière démontable sur ladite fourchette et recouvrir la partie interne de cette dernière, du cté de la channe.- 1 - Protective element for front derailleur of bicycles or similar vehicles comprising a clevis with two parallel forks braced by an axis at their rear parts, said forks being subjected to a control system, characterized in that it consists of a shoe (1) of a general shape substantially corresponding to that of the inner fork (F) and having arrangements to be removably adapted to said fork and cover the inner part thereof, the side of the channe . - 2 - Elément selon la revendication i, caractérsé en ce qe le patin est réalisé en matière plastique du type résine acétale.- 2 - Element according to claim i, characterized in that the skid is made of plastic material of the acetal resin type. - 3 - élément selon la revendication 1, caractérisé en ce que les agencements sont constitués, d'une part, par un fourreau (1a) formé dans la partie avant en étant apte à coiffer l'extré- mité avant de la fourchette interne et, d'autre part, par une ouverture établie à la partie arrière du patin et apte à coopérer avec l'axe entretoise. - 3 - element according to claim 1, characterized in that the arrangements are constituted, on the one hand, by a sheath (1a) formed in the front part being able to cap the front end of the inner fork and on the other hand, by an opening established at the rear part of the pad and capable of cooperating with the spacer shaft. - 4 - Elément selon la revendication , caractérisé en ce que le fourreau (la) présente une fente profilée dans laquelle s'engage l'extrémité avant de la fourchette de sorte qu'après positionnement le patin recouvre la totalité de la face interne de la fourchette.- 4 - Element according to claim, characterized in that the sleeve (la) has a profiled slot in which engages the front end of the fork so that after positioning the pad covers the entire inner face of the fork. - 5 - Elément selon la revendication I, caractérisé en ce que la face interne du patin présente au niveau de la base et de la partie avant une rampe profilée (lc) conformée pour faciliter le passage de la chaîne du plateau de diamètre inférieur au plateau de diamètre supérieur. - 5 - Element according to claim I, characterized in that the inner face of the shoe has at the base and the front portion a profiled ramp (lc) shaped to facilitate the passage of the chain of the lower diameter plate plateau of greater diameter.
FR8714743A 1987-10-20 1987-10-20 PROTECTIVE ELEMENT FOR FRONT DERAILLEUR OF BICYCLES OR SIMILAR VEHICLES Expired FR2621968B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8714743A FR2621968B3 (en) 1987-10-20 1987-10-20 PROTECTIVE ELEMENT FOR FRONT DERAILLEUR OF BICYCLES OR SIMILAR VEHICLES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8714743A FR2621968B3 (en) 1987-10-20 1987-10-20 PROTECTIVE ELEMENT FOR FRONT DERAILLEUR OF BICYCLES OR SIMILAR VEHICLES

Publications (2)

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FR2621968A3 true FR2621968A3 (en) 1989-04-21
FR2621968B3 FR2621968B3 (en) 1989-09-22

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428085A1 (en) * 1989-11-14 1991-05-22 Shimano Inc. Front derailleur
US5676616A (en) * 1996-03-06 1997-10-14 Shimano, Inc. Protective cover for a bicycle derailleur
FR2797841A1 (en) * 1999-08-27 2001-03-02 Campagnolo Srl Fork for bicycle front derailleur gear comprises two parallel plates one having additional plate reducing gap separating plates
WO2001053718A1 (en) * 2000-01-20 2001-07-26 Wickliff Christopher Alan Front derailleur for a bicycle with annular chain guide
US6641495B2 (en) * 2000-09-15 2003-11-04 Campagnolo Srl Front bicycle derailleur fork and derailleur comprising said fork
FR2870508A1 (en) * 2004-04-26 2005-11-25 Jean Yves Delale Push-pull system for bicycle, has crank set mechanism constructed around central axle inserted in right pedal crank, and derailleur system comprising functional piece permitting to maintain spacing of control linkage
US6986723B2 (en) * 2000-09-15 2006-01-17 Campagnolo S.R.L. Front bicycle derailleur
US7025698B2 (en) 2000-01-20 2006-04-11 Christopher Alan Wickliffe Front derailleur with annular chain guide, bicycle and method of operation
WO2007060299A1 (en) * 2005-11-24 2007-05-31 Jean-Yves Delale Ergonomic pedal system with associated derailleur
DE102005057862A1 (en) * 2005-12-03 2007-06-06 Sram Deutschland Gmbh Front derailleur
EP1762482A3 (en) * 2005-09-12 2007-07-11 Shimano Inc. Front derailleur chain detachment prevention member
DE102021212937A1 (en) 2021-11-17 2023-05-17 Shimano Inc. CHAIN GUIDE MOUNTING ELEMENT FOR FRONT DERAILLEUR CHAIN GUIDE
DE102022202720A1 (en) 2022-03-21 2023-09-21 Shimano Inc. SLIDING PLATE FOR ATTACHING TO A FRONT DERAILLEUR CHAIN GUIDE

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE625169A (en) *
FR967698A (en) * 1948-06-08 1950-11-09 Chain guide for gear change by chain derailment
FR2518042A1 (en) * 1981-12-15 1983-06-17 Huret & Fils Guide arm for bicycle derailleur - has head with side flanges, one carrying anti-friction coating on guide surface
US4573950A (en) * 1983-06-24 1986-03-04 Shimano Industrial Company Limited Chain guide in a front derailleur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE625169A (en) *
FR967698A (en) * 1948-06-08 1950-11-09 Chain guide for gear change by chain derailment
FR2518042A1 (en) * 1981-12-15 1983-06-17 Huret & Fils Guide arm for bicycle derailleur - has head with side flanges, one carrying anti-friction coating on guide surface
US4573950A (en) * 1983-06-24 1986-03-04 Shimano Industrial Company Limited Chain guide in a front derailleur

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428085A1 (en) * 1989-11-14 1991-05-22 Shimano Inc. Front derailleur
US5171187A (en) * 1989-11-14 1992-12-15 Shimano, Inc. Front derailleur
US5676616A (en) * 1996-03-06 1997-10-14 Shimano, Inc. Protective cover for a bicycle derailleur
FR2797841A1 (en) * 1999-08-27 2001-03-02 Campagnolo Srl Fork for bicycle front derailleur gear comprises two parallel plates one having additional plate reducing gap separating plates
WO2001053718A1 (en) * 2000-01-20 2001-07-26 Wickliff Christopher Alan Front derailleur for a bicycle with annular chain guide
US6454671B1 (en) * 2000-01-20 2002-09-24 Christopher Alan Wickliffe Front bicycle derailleur with annular chain guide
US7025698B2 (en) 2000-01-20 2006-04-11 Christopher Alan Wickliffe Front derailleur with annular chain guide, bicycle and method of operation
US6986723B2 (en) * 2000-09-15 2006-01-17 Campagnolo S.R.L. Front bicycle derailleur
US6641495B2 (en) * 2000-09-15 2003-11-04 Campagnolo Srl Front bicycle derailleur fork and derailleur comprising said fork
CZ298113B6 (en) * 2000-09-15 2007-06-27 Campagnolo Sri Front bicycle derailleur fork and derailleur comprising such fork
FR2870508A1 (en) * 2004-04-26 2005-11-25 Jean Yves Delale Push-pull system for bicycle, has crank set mechanism constructed around central axle inserted in right pedal crank, and derailleur system comprising functional piece permitting to maintain spacing of control linkage
EP1762482A3 (en) * 2005-09-12 2007-07-11 Shimano Inc. Front derailleur chain detachment prevention member
US8444514B2 (en) 2005-09-12 2013-05-21 Shimano Inc. Front derailleur chain detachment prevention member
WO2007060299A1 (en) * 2005-11-24 2007-05-31 Jean-Yves Delale Ergonomic pedal system with associated derailleur
DE102005057862A1 (en) * 2005-12-03 2007-06-06 Sram Deutschland Gmbh Front derailleur
DE102021212937A1 (en) 2021-11-17 2023-05-17 Shimano Inc. CHAIN GUIDE MOUNTING ELEMENT FOR FRONT DERAILLEUR CHAIN GUIDE
DE102022202720A1 (en) 2022-03-21 2023-09-21 Shimano Inc. SLIDING PLATE FOR ATTACHING TO A FRONT DERAILLEUR CHAIN GUIDE

Also Published As

Publication number Publication date
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