FR2664948A1 - Assembly of tubes made from heat-curable composite materials, with these tubes being immobilised by a prestressed cable - Google Patents

Assembly of tubes made from heat-curable composite materials, with these tubes being immobilised by a prestressed cable Download PDF

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Publication number
FR2664948A1
FR2664948A1 FR9009543A FR9009543A FR2664948A1 FR 2664948 A1 FR2664948 A1 FR 2664948A1 FR 9009543 A FR9009543 A FR 9009543A FR 9009543 A FR9009543 A FR 9009543A FR 2664948 A1 FR2664948 A1 FR 2664948A1
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FR
France
Prior art keywords
tubes
assembly
cable
composite materials
heat
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
Application number
FR9009543A
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French (fr)
Inventor
David Jean Alphonse
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR9009543A priority Critical patent/FR2664948A1/en
Publication of FR2664948A1 publication Critical patent/FR2664948A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K19/00—Cycle frames
    • B62K19/18—Joints between frame members
    • B62K19/28—Means for strengthening joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K19/00—Cycle frames
    • B62K19/18—Joints between frame members
    • B62K19/22—Adhesive joints

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ropes Or Cables (AREA)

Abstract

The present invention offers improvements to Patent no. 86 08761, and simplifies manufacture. The main modification is the use of one and the same element composing sleeves and reinforcements. On the other hand, a cable made from heat-curable composite passes through the tubes and sleeves in order to immobilise the assembly, using a prestress on the cable. The fastening of the ends of the cable is similar to that of the steel in prestressed concrete.

Description

La présente invention concerne l'assemblage de tubes en matériaux composites thermodurcissables avec leur blocage par cable précontraint pour la réalisation en particulier de cadre de bicyclette.The present invention relates to the assembly of tubes of thermosetting composite materials with their locking by prestressed cable for the production in particular of a bicycle frame.

Depuis quelques années les composites, spécialement, le carbone/époxy ont pénétré le monde du cadre de vélo.In recent years composites, especially carbon / epoxy have entered the world of bicycle frames.

En dehors de mon brevet nO 8608761, sur l'ensemble du monde, les tubes des cadres carbone sont toujours assemblés avec des élèments aluminium dont les inconvénients sont connus.Apart from my patent No. 8608761, all over the world, the carbon frame tubes are always assembled with aluminum elements, the drawbacks of which are known.

La présente invention est d'apporter des améliorations sensilles au brevet 8608761 et de simplifier au maximum la fabrication.The present invention is to make significant improvements to patent 8608761 and to simplify manufacturing as much as possible.

La modification principale est l'utilisation du renfort comme support du manchon, renfort et manchon ne faisant qu'ui. The main modification is the use of the reinforcement as a support for the sleeve, reinforcement and sleeve only doing yes.

Prenons comme exemple le tube de selle. La partie qui doit recevoir le renfort du tube de selle (fig. 1) est diminuée d'épaisseur. On ceinture cette partie dégagée par un écheveau de fibre de carbone/époxy par exemple, dont les deux extrémités traversent l'évidement du moule représentant la forme du manchon, les fibres sont mises en tension et après ltétuvage et le démoulage, le manchon et le tube ne font plats qu'un (fig. 2)
La même technique est apPliquée pour les manchons recevant les haubans sur le tube de selle. Idem pour les manchons de la boite de pédalier et le tube de direction.Take the seat tube as an example. The part which must receive the reinforcement of the seat tube (fig. 1) is reduced in thickness. This exposed part is belted by a skein of carbon fiber / epoxy for example, the two ends of which pass through the mold recess representing the shape of the sleeve, the fibers are tensioned and after steaming and demolding, the sleeve and the tube are one flat (fig. 2)
The same technique is applied for the sleeves receiving the seat stays on the seat tube. Ditto for the sleeves of the bottom bracket and the steering tube.

Pour ce dernier, l'application technique est différentes, le renfort du tube circule dans le petit tube de construction nécessaire à sa forme (fig. 3). For the latter, the technical application is different, the tube reinforcement circulates in the small construction tube necessary for its shape (fig. 3).

En dehors de cette modification technique, premier objet de l'invention, une conception de blocage des tubes apporte un plus à la rigidité tout en empêchant le déboitement des tubes.Apart from this technical modification, the first object of the invention, a tube blocking design brings more rigidity while preventing the dislocation of the tubes.

Le principe étant le suivant : après avoir percé dans le sens longitudinal les manchons d'un de 3 m/m par exemple, on fait passer avant montage du cadre, un cable composite carbone/époxy ou autre, par les trous des manchons (fig. *), ainsi le cable à qui on fait subir uFe précontrainte rend solidaire l'ensemble manchon et tube que l'on a collé au préalable. La tension donnée à la précontrainte du câble est contrôlable par tensiomètre et permet ainsi de mesurer la rigidité de l'ensemble, la fixation du câble précontraint peut-ebtre similaire aux méthodes employées pour le B.A. précontraint. The principle being as follows: after having pierced in the longitudinal direction the sleeves of a 3 m / m for example, we pass before mounting the frame, a carbon / epoxy or other composite cable, through the holes of the sleeves (fig . *), thus the cable which is subjected to a prestressed uFe makes integral the sleeve and tube assembly which has been glued beforehand. The tension given to the prestressing of the cable is controllable by tensiometer and thus makes it possible to measure the rigidity of the assembly, the fixing of the prestressed cable can be similar to the methods used for the prestressed B.A.

Claims (2)

REVENDICATIONS 10) Dispositif d'assemblage de tubes en matériaux composites thermodurcissables, notamment pour la réalisation de cadre de bicyclette caractérisé par le blocage de ceux-ci par câble précontraint, les manchons d'assemblage des tubes en matériaux composites thermodurcissables formant avec les renforts une seule pièce.10) Device for assembling tubes of thermosetting composite materials, in particular for producing a bicycle frame characterized by the locking of the latter by prestressed cable, the sleeves for assembling tubes of thermosetting composite materials forming with the reinforcements a single room. 20) Dispositif selon la revendication 1 caractérisé par un câble en composite thermodurcissable précontrain t ceinturant le cadre pour blocage. 20) Device according to claim 1 characterized by a thermosetting composite cable prestressed t surrounding the frame for blocking.
FR9009543A 1990-07-20 1990-07-20 Assembly of tubes made from heat-curable composite materials, with these tubes being immobilised by a prestressed cable Pending FR2664948A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9009543A FR2664948A1 (en) 1990-07-20 1990-07-20 Assembly of tubes made from heat-curable composite materials, with these tubes being immobilised by a prestressed cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9009543A FR2664948A1 (en) 1990-07-20 1990-07-20 Assembly of tubes made from heat-curable composite materials, with these tubes being immobilised by a prestressed cable

Publications (1)

Publication Number Publication Date
FR2664948A1 true FR2664948A1 (en) 1992-01-24

Family

ID=9399113

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9009543A Pending FR2664948A1 (en) 1990-07-20 1990-07-20 Assembly of tubes made from heat-curable composite materials, with these tubes being immobilised by a prestressed cable

Country Status (1)

Country Link
FR (1) FR2664948A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2469932A (en) * 2009-05-01 2010-11-03 Moulton Development Ltd Bicycle frame incorporating tension members

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576576A1 (en) * 1985-01-29 1986-08-01 David Jean Bicycle frame made from composite materials with tubes assembly without connection piece
FR2600031A1 (en) * 1986-06-13 1987-12-18 David Jean Assembly of tubes made from heat-curable composite materials for producing bicycle frames
US4856800A (en) * 1987-11-11 1989-08-15 Araya Industrial Co., Ltd. Pipe joining construction of a bicycle frame

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576576A1 (en) * 1985-01-29 1986-08-01 David Jean Bicycle frame made from composite materials with tubes assembly without connection piece
FR2600031A1 (en) * 1986-06-13 1987-12-18 David Jean Assembly of tubes made from heat-curable composite materials for producing bicycle frames
US4856800A (en) * 1987-11-11 1989-08-15 Araya Industrial Co., Ltd. Pipe joining construction of a bicycle frame

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DESIGN ENGINEERING. février 1987, LONDON GB pages 35 - 46; Pye: "Adhesives in automotive and structural engineering in Japan" *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2469932A (en) * 2009-05-01 2010-11-03 Moulton Development Ltd Bicycle frame incorporating tension members
GB2469932B (en) * 2009-05-01 2011-04-27 Moulton Development Ltd Bicycle frame

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