FR2562622A1

FR2562622A1 - Springs for moving apart the handles of pliers

Info

Publication number: FR2562622A1
Application number: FR8405780A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-04-09
Filing date: 1984-04-09
Publication date: 1985-10-11

Abstract

Spring of a particular shape for moving apart the handles of pliers, secateurs, or other objects in which it may have the same function. The spring of usual appearance is composed of a cylindrical body comprising several coils of round wire, sufficiently spaced so as to have almost all the necessary travel, connected at two ends by several turns tightened by one turn which is approximately conical with a variable pitch which can go back inside the turns of the body when they are contiquous. The invention can be used on cutting pliers for wire, shears or secateurs, etc.

Description

La présente invention a pour objet principal un type de ressort pour écarter les poignées de pinces diverses, sécateurs ou autres objets articulés ou non ayant besoin d'un ressort pour assurer un écartement. The main object of the present invention is a type of spring for spreading the handles of various pliers, secateurs or other articulated or non-articulated objects needing a spring to ensure separation.

Habituellement on utilise pour cette fonction un ressort en feuillard se présentant sous la forme biconique de deux ressorts volutes liés par leur grande base. Ces pièces sont fabriquées à partir de feuillard découpé en V puis enroulé et traité pour obtenir l'élasticité nécessaire. Usually a strip spring is used for this function in the biconical form of two scroll springs linked by their large base. These parts are made from a strip cut in V then rolled up and treated to obtain the necessary elasticity.

Ces ressorts sont aussi remplacés par des ressorts hélicotdaux biconiques en fil rond dont les extrémités plus petites sont centrées sur des tétons solidaires des poignées, différents dispositifs sont en service pour le centrage des petites bases des ressorts et assurent une compression correcte sans flambage du ressort. Les formes utilisées actuellement ne permettent pas de remplacer automatiquement un Ressort en feuillard par un ressort en fil rond, notamment lorsque la course est importante, on constate des flambages disgracieux et des déformations, rendant le fonctionnement de la pince impossible.These springs are also replaced by biconical helical springs in round wire, the smaller ends of which are centered on studs integral with the handles, various devices are in use for centering the small bases of the springs and ensure correct compression without buckling of the spring. The shapes currently used do not automatically replace a strip spring with a round wire spring, especially when the stroke is large, there are unsightly buckling and deformations, making the operation of the clamp impossible.

Le ressort selon l'invention peut remplacer un ressort en feuillard sans modification des modes de centrage, sans positionnement particulier ou autres précautions. The spring according to the invention can replace a strip spring without modifying the centering modes, without particular positioning or other precautions.

Il est constitué par un corps cylindrique 1 comprenant plu sieurs spires avec un pas assez grand pour assurer en grande partie l'ouverture de la pince, le rapport diamètre moyen sur diamètre de fil et le pas ont été choisis pour permettre la compression à spires jointives sans déform2tions
Cette partie cylindrique 1 pour des besoins particuliers pouvant être conique et se comprimer & spires-jointives est raccordée aux deux extrémités 2 par une spire environ à enroulement conique et à pas variable 3 qui lors de la compression rentre à l'intérieur de la partie cylindrique 1, assurant le complément de course nécessaire par le fait de l'enroulement conique qui peut amener une flèche négative, et la forme de la spire assure le centrage des extrémités 2 et du corps 1.It is constituted by a cylindrical body 1 comprising several turns with a not large enough to ensure largely the opening of the clamp, the ratio average diameter on diameter of wire and the pitch were chosen to allow compression with contiguous turns without distortions
This cylindrical part 1 for special needs which can be conical and compressive & contiguous turns is connected at both ends 2 by a turn approximately with conical winding and with variable pitch 3 which during compression enters inside the cylindrical part 1, ensuring the additional travel required by the fact of the conical winding which can cause a negative arrow, and the shape of the turn ensures the centering of the ends 2 and of the body 1.

Enfin les deux extrémités 2 à spires jointives ou non, assurent par leurs formes
- le centrage du ressort sur ses deux tétons 4
- le maintien du ressort en place même si l'on écarte les poignées gracie à un resserrement de la première spire de chaque ex trémité qui rentre en force sur les tétons 4 qui sont en général plus gros à leur extrémité qu'à leur base sur la poignée.Finally the two ends 2 with contiguous turns or not, ensure by their shapes
- the centering of the spring on its two pins 4
- keeping the spring in place even if the handles are removed thanks to a tightening of the first turn of each end which comes into force on the nipples 4 which are generally larger at their end than at their base on the handle.

Ce type de ressort s'applique à toute pince ou instrument comportant un ressort en feuil lard habituel ou système a ressort ou élastique nécessitant une certaine course et que pour cela un ressort classique cylindrique biconique ou d'autre forme ne peut pas convenir. This type of spring applies to any clamp or instrument comprising a usual bacillus spring or spring or elastic system requiring a certain stroke and that for this a conventional biconical cylindrical spring or of other shape cannot be suitable.

Bien entendu l'invention n'est pas limitée aux exemples d'applications ou de réalisations ci-dessus décrits mais concerne également toutes les variantes d'utzli$atxons et de réalisations sans pour cela sortir du Ac cadre d l'invention. Of course, the invention is not limited to the examples of applications or embodiments described above, but also relates to all variants of utzli $ atxons and of embodiments without departing from the scope of the invention.

Claims

CLAIMS -n 10 / - Spring for spreading the grips of pliers characterized by the fact that it is composed of a cylindrical body of several turns with a pitch large enough to have a suitable court with the function that is his. 2 / - Spring according to claim 1 characterized in that the cylindrical part may also be conical.

30 / - Spring according to claim 1 characterized in that

that a variable pitch conical turn is connected & each

end of the cylindrical part.

40 / - Spring according to claim 3 characterized in that

that the conical turn of each end of the cylin part

drique is connected to two sets of cylindrical turns

of a much smaller diameter.

50 / - Spring according to claim 4 characterized in that

in each set of cylindrical turns, these are

or not 60 / - Spring according to claim 5 characterized in that

each set of cylindrical turns has & its extr-

mite leaning on the handle a slightly tight turn

compared to others.

70 / - Spring according to claim 6 characterized in that

the tightened turns of each end are ground or not

to secure their seat.

80 / w Spring according to claim 1 characterized in that

that he does not have to be positioned to fulfill his office.

90 / - Spring according to claim 1 characterized in that

that it can replace a form wound coil spring

biconical usually used on this kind of airlock device

no modification of the latter.