EP0706442B1 - Tightening tool such as a screwdriver - Google Patents

Tightening tool such as a screwdriver Download PDF

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Publication number
EP0706442B1
EP0706442B1 EP95918039A EP95918039A EP0706442B1 EP 0706442 B1 EP0706442 B1 EP 0706442B1 EP 95918039 A EP95918039 A EP 95918039A EP 95918039 A EP95918039 A EP 95918039A EP 0706442 B1 EP0706442 B1 EP 0706442B1
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EP
European Patent Office
Prior art keywords
driving
tool according
driven
handle
parts
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Expired - Lifetime
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EP95918039A
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German (de)
French (fr)
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EP0706442A1 (en
Inventor
Hervé Gilbert GOMAS
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Facom SA
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Facom SA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/06—Handle constructions reversible or adjustable for position
    • B25G1/063—Handle constructions reversible or adjustable for position for screwdrivers, wrenches or spanners
    • B25G1/066—Handle constructions reversible or adjustable for position for screwdrivers, wrenches or spanners the grip itself being angularly adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00—Screwdrivers
    • B25B15/02—Screwdrivers operated by rotating the handle

Definitions

  • the present invention relates to a tool for screwing-unscrewing of the type described in the preamble of claim 1. It applies especially with screwdrivers.
  • the leading part forms the entire handle
  • the driven part is formed by the blade of the screwdriver.
  • the handle has a slot longitudinal, which seriously affects the comfort of typing of the handle in said first position of use.
  • the object of the invention is to provide means economical and reliable for exercising on a part either a relatively weak couple, or a couple much higher, by having a tool identical to conventional tools in the first position of use.
  • a screwdriver it is allow rapid screwing followed by tightening energetic at the end of the tightening, or an unlocking of a screw followed by rapid unscrewing.
  • the invention relates to a tool for tightening of the aforementioned type and including the characteristics of the claim 1.
  • the clamping tool according to the invention can have one or more of the characteristics described in claims 2 to 10.
  • This screwdriver 1 consists of a handle 2 carrying a blade 3 and has, in its normal position of use, a general axis X-X 'assumed to be vertical.
  • the handle 2 of the screwdriver 1 breaks down into a driving part or handle 4 and in a driven part 5 including a blade holder.
  • the handle 4 consists of an envelope exterior 6 of revolution around the axis XX ′, of a shape adapted to be easily gripped by a operator.
  • This envelope 6, for example in material plastic, has an elongated shape and has two end edges, upper 7 and lower 8, flat and horizontal.
  • This envelope 6 surrounds a cylindrical core 9 of axis XX ', for example of steel, the upper end of which 10 is flush with the end 7 of the casing 6 and of which a lower part 11 protrudes under the end 8 of this envelope.
  • the core 9 On a lower section of the order of a third of its length, the core 9 has a blind axial bore 12 with hexagon as shown in Figure 4. This bore 12 clearly penetrates into the envelope 6 and leads to the low.
  • Figure 5 shows that the lower part projection 11 of core 9 is split along the diameter of the bore 12, so as to form two legs 13 and 14 diametrically opposite and symmetrical about the axis X-X '. These legs are delimited internally by respective flat and parallel surfaces 15.16 making part of the above-mentioned hexagon.
  • the upper end 7 of the casing 6 carries a cap 20 in a spherical cap having a base diameter equal to that of this end 7.
  • This plug 20 is fixed by a cylindrical finger 21 inserted in a blind bore 22 of axis X-X ', formed in the core 9, the bore 22 being a depth slightly greater than the length of the finger 21.
  • the blade holder consists of a body 23, by plastic example, externally tapered and slightly converge downward, having two slices upper end 24 and lower 25 flat and horizontal.
  • This body 23 is crossed along the axis XX ' by a bore having two successive diameter reductions.
  • the bore section 26 having the largest diameter extends about half the height of the body 23 to from the upper end 24 thereof, from so as to be slightly deeper than the length of the lower part 11 projecting from the core 9.
  • the diameter of the section 26 is equal to the outside diameter of this core.
  • the intermediate bore section 27 has a hexagonal section identical to that of bore 12, and the second reduction in diameter defines a shoulder horizontal 28 near the lower end 25 of the body 23.
  • a shaft 29 of axis XX ′ for example of steel, with combined hexagon section of the section 27 and the bore 12, is force-fitted from above into the body 23 up to abut on the shoulder 28.
  • An upper section 30 of this tree 29 protrudes above the end upper 24 of body 23.
  • Two longitudinal grooves 31 and 32 diametrically opposite extend upward along the tree 29, substantially from the bottom of the bore section 26, without opening up.
  • the depth of these grooves allows the insertion of the protruding ends of the lugs 18 and 19 inside the grooves 31 and 32, with the surfaces 15 and 16 of legs 13 and 14 in contact with two opposite sides of the shaft 29.
  • an elastic ring circular 33 radially elastic is received in a peripheral groove of the shaft 29, so as to increase the friction between this shaft 29 and the adjacent surfaces bore 12 and legs 13.14.
  • a blind bore 34 This bore leads to the lower end of it and has a diameter slightly lower than that of the lower body section 23.
  • the screwdriver blade 3 is inserted with friction by the bottom inside this bore 34 and abuts against the bottom of it.
  • screwdriver 1 The operation of screwdriver 1 is now explained with reference to Figures 1, 2 and 6.
  • the screwdriver is used as a screwdriver usual, in the configuration of Figure 1.
  • the handle 4 is then vertical to the blade holder while being locked in it against any tipping. More specifically, the lower part 11 of the handle 4 is fitted into the bore section 26 of the blade holder, while the upper part 30 of the shaft 29 is inserted in bore 12.
  • This lock can be qualified as "positive” because it subsists when the user exercises a screwing / unscrewing couple and / or a pushing down and / or leveraging in a plane any radial, i.e. for any usual action exercised when using a screwdriver classic.
  • the handle 4 rotates the blade holder thanks to the shape hex of bore 12 and shaft 29 and possibly to the cooperation of the lugs 18 and 19 and the grooves 31 and 32.
  • the handle 4 is then unlocked, in now attaching the blade holder and pulling up the handle 4.
  • the pins 18 and 19 slide in the grooves 31 and 32 until they stop at the end superior of these.
  • the upper part of the tree 29 then lying entirely between the legs 13 and 14, the handle 4 can be tilted around the axis horizontal Y-Y 'defined by lugs 18 and 19, as the shows figure 6.
  • This part 4 thus constitutes an arm lever, and it's easy to exert a high torque on the screw, transmitted to the blade holder 5 via surfaces 15 and 16.
  • FIG. 7 shows a variant of blade holder in which is incorporated a reversible pawl 35.
  • This ratchet has a classic general structure, with a stator constituted by the body 23, a rotor 36 which has a flat vertical surface 37 extending along a cord, a movable wedge 38, a spring 39 for biasing this corner towards one end or the other of the surface 37, and a selection ring 40 which internally carries a lug 41 for attacking the spring.
  • the ring 40 is mounted rotatable at the lower end of the body 23 by means of a circular elastic ring 42, and its rotation in a sense or in the other defines the active direction of the ratchet.
  • the shaft 29 of FIGS. 1 and 2 came integrally with the body 23.
  • the blade 3 (which, in the example shown, is reversible) crosses freely a central orifice of the ring 40, then crosses with friction the rotor 36 and the shaft 29, until it stops at bottom of bore 34 of this shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Description

La présente invention est relative à un outil de vissage-dévissage du type décrit dans le préambule de la revendication 1. Elle s'applique en particulier aux tourne vis.The present invention relates to a tool for screwing-unscrewing of the type described in the preamble of claim 1. It applies especially with screwdrivers.

Dans un tournevis connu de ce type (FR-A-2570975) comprenant les caractéristiques du préambule de la revendication 1, la partie menante forme la totalité du manche, et la partie menée est constituée par la lame du tournevis. Pour permettre le basculement, le manche présente une fente longitudinale, qui nuit gravement au confort de la saisie du manche dans ladite première position d'utilisation.In a known screwdriver of this type (FR-A-2570975) comprising the characteristics of the preamble of claim 1, the leading part forms the entire handle, and the driven part is formed by the blade of the screwdriver. For allow tilting, the handle has a slot longitudinal, which seriously affects the comfort of typing of the handle in said first position of use.

L'invention a pour but de fournir des moyens économiques et fiables permettant d'exercer sur une pièce soit un couple relativement faible, soit un couple beaucoup plus élevé, en disposant d'un outil identique aux outils classiques dans la première position d'utilisation. En particulier, dans le cas d'un tournevis, il s'agit de permettre de réaliser un vissage rapide suivi d'un serrage énergique en fin de vissage, ou bien un déblocage d'une vis suivi d'un dévissage rapide.The object of the invention is to provide means economical and reliable for exercising on a part either a relatively weak couple, or a couple much higher, by having a tool identical to conventional tools in the first position of use. In particular, in the case of a screwdriver, it is allow rapid screwing followed by tightening energetic at the end of the tightening, or an unlocking of a screw followed by rapid unscrewing.

A cet effet, l'invention a pour objet un outil de serrage du type précité et comprenant les caractéristiques de la revendication 1. To this end, the invention relates to a tool for tightening of the aforementioned type and including the characteristics of the claim 1.

L'outil de serrage suivant l'invention peut comporter une ou plusieurs des caractéristiques décrites dans les revendications 2 à 10. The clamping tool according to the invention can have one or more of the characteristics described in claims 2 to 10.

Un exemple de réalisation de l'invention va maintenant être décrit en regard des dessins annexés, sur lesquels :

  • la figure 1 est une coupe longitudinale d'un tournevis suivant l'invention, en position verrouillée du mécanisme de basculement ;
  • la figure 2 est une vue analogue du tournevis de la figure 1, en position déverrouillée du mécanisme de basculement ;
  • la figure 3 est une vue partielle en élévation du mécanisme de basculement ;
  • les figures 4 et 5 sont des vues en coupe transversale prises respectivement suivant les lignes IV-IV et V-V de la figure 3 ;
  • la figure 6 représente le tournevis en position déverrouillée du mécanisme de basculement, avec le manche en cours de basculement, la vue étant prise suivant la flèche VI de la figure 2 ; et
  • la figure 7 représente en coupe longitudinale, à plus grande échelle, une partie d'une variante.
An embodiment of the invention will now be described with reference to the accompanying drawings, in which:
  • Figure 1 is a longitudinal section of a screwdriver according to the invention, in the locked position of the tilting mechanism;
  • Figure 2 is a similar view of the screwdriver of Figure 1, in the unlocked position of the tilting mechanism;
  • Figure 3 is a partial elevational view of the tilting mechanism;
  • Figures 4 and 5 are cross-sectional views taken respectively along lines IV-IV and VV of Figure 3;
  • 6 shows the screwdriver in the unlocked position of the tilting mechanism, with the handle being tilted, the view being taken along arrow VI of Figure 2; and
  • Figure 7 shows in longitudinal section, on a larger scale, part of a variant.

En se reportant aux figures 1 à 6, l'outil de serrage est décrit en étant appliqué à un tournevis 1. Ce tournevis 1 est constitué d'un manche 2 portant une lame 3 et possède, dans sa position normale d'utilisation, un axe général X-X' supposé vertical.Referring to Figures 1 to 6, the tightening is described by being applied to a screwdriver 1. This screwdriver 1 consists of a handle 2 carrying a blade 3 and has, in its normal position of use, a general axis X-X 'assumed to be vertical.

Le manche 2 du tournevis 1 se décompose en une partie menante ou poignée 4 et en une partie menée 5 comprenant un porte-lame.The handle 2 of the screwdriver 1 breaks down into a driving part or handle 4 and in a driven part 5 including a blade holder.

La poignée 4 est constituée d'une enveloppe extérieure 6 de révolution autour de l'axe X-X', d'une forme adaptée pour être facilement préhensible par un opérateur. Cette enveloppe 6, par exemple en matière plastique, a une forme allongée et a deux tranches d'extrémité, supérieure 7 et inférieure 8, planes et horizontales. The handle 4 consists of an envelope exterior 6 of revolution around the axis XX ′, of a shape adapted to be easily gripped by a operator. This envelope 6, for example in material plastic, has an elongated shape and has two end edges, upper 7 and lower 8, flat and horizontal.

Cette enveloppe 6 entoure un noyau cylindrique 9 d'axe X-X', par exemple en acier, dont l'extrémité supérieure 10 affleure l'extrémité 7 de l'enveloppe 6 et dont une partie inférieure 11 fait saillie sous l'extrémité 8 de cette enveloppe.This envelope 6 surrounds a cylindrical core 9 of axis XX ', for example of steel, the upper end of which 10 is flush with the end 7 of the casing 6 and of which a lower part 11 protrudes under the end 8 of this envelope.

Sur un tronçon inférieur de l'ordre du tiers de sa longueur, le noyau 9 comporte un alésage axial borgne 12 à six-pans comme le montre la figure 4. Cet alésage 12 pénètre nettement dans l'enveloppe 6 et débouche vers le bas.On a lower section of the order of a third of its length, the core 9 has a blind axial bore 12 with hexagon as shown in Figure 4. This bore 12 clearly penetrates into the envelope 6 and leads to the low.

La figure 5 montre que la partie inférieure saillante 11 du noyau 9 est fendue suivant le diamètre de l'alésage 12, de manière à former deux jambes 13 et 14 diamétralement opposées et symétriques par rapport à l'axe X-X'. Ces jambes sont délimitées intérieurement par des surfaces planes et parallèles respectives 15,16 faisant partie du six-pans précité.Figure 5 shows that the lower part projection 11 of core 9 is split along the diameter of the bore 12, so as to form two legs 13 and 14 diametrically opposite and symmetrical about the axis X-X '. These legs are delimited internally by respective flat and parallel surfaces 15.16 making part of the above-mentioned hexagon.

Près de l'extrémité libre des jambes 13,14 est percé dans celles-ci un alésage 17 traversant, horizontal et perpendiculaire aux surfaces 15 et 16 et d'un diamètre faible par rapport à celui de l'alésage 12. A l'intérieur de cet alésage 17 sont fixés deux ergots 18 et 19, affleurant la surface extérieure des jambes 13 et 14 respectivement et légèrement en saillie intérieure par rapport aux surfaces 15 et 16.Near the free end of the legs 13.14 is drilled in them a through bore 17, horizontal and perpendicular to surfaces 15 and 16 and of a diameter weak compared to that of bore 12. Inside from this bore 17 are fixed two lugs 18 and 19, flush the outer surface of the legs 13 and 14 respectively and slightly protruding inside compared to surfaces 15 and 16.

L'extrémité supérieure 7 de l'enveloppe 6 porte un bouchon 20 en calotte sphérique ayant un diamètre de base égal à celui de cette extrémité 7. Ce bouchon 20 est fixé par un doigt cylindrique 21 inséré dans un alésage borgne 22 d'axe X-X', ménagé dans le noyau 9, l'alésage 22 étant d'une profondeur légèrement supérieure à la longueur du doigt 21.The upper end 7 of the casing 6 carries a cap 20 in a spherical cap having a base diameter equal to that of this end 7. This plug 20 is fixed by a cylindrical finger 21 inserted in a blind bore 22 of axis X-X ', formed in the core 9, the bore 22 being a depth slightly greater than the length of the finger 21.

Le porte-lame est constitué d'un corps 23, par exemple en matière plastique, extérieurement tronconique et légèrement convergent vers le bas, ayant deux tranches d'extrémité supérieure 24 et inférieure 25 planes et horizontales. Ce corps 23 est traversé selon l'axe X-X' par un alésage ayant deux réductions de diamètre successives. Le tronçon d'alésage 26 ayant le plus grand diamètre s'étend sur environ la moitié de la hauteur du corps 23 à partir de l'extrémité supérieure 24 de celui-ci, de manière à être légèrement plus profond que la longueur de la partie inférieure 11 en saillie du noyau 9. Le diamètre du tronçon 26 est égal au diamètre extérieur de ce noyau.The blade holder consists of a body 23, by plastic example, externally tapered and slightly converge downward, having two slices upper end 24 and lower 25 flat and horizontal. This body 23 is crossed along the axis XX ' by a bore having two successive diameter reductions. The bore section 26 having the largest diameter extends about half the height of the body 23 to from the upper end 24 thereof, from so as to be slightly deeper than the length of the lower part 11 projecting from the core 9. The diameter of the section 26 is equal to the outside diameter of this core.

Le tronçon intermédiaire d'alésage 27 a une section en six-pans identique à celle de l'alésage 12, et la deuxième réduction de diamètre définit un épaulement horizontal 28 près de l'extrémité inférieure 25 du corps 23.The intermediate bore section 27 has a hexagonal section identical to that of bore 12, and the second reduction in diameter defines a shoulder horizontal 28 near the lower end 25 of the body 23.

Un arbre 29 d'axe X-X', par exemple en acier, à section à six-pans conjuguée du tronçon 27 et de l'alésage 12, est inséré à force par le haut dans le corps 23 jusqu'à buter sur l'épaulement 28. Un tronçon supérieur 30 de cet arbre 29 est en saillie au-dessus de l'extrémité supérieure 24 du corps 23.A shaft 29 of axis XX ′, for example of steel, with combined hexagon section of the section 27 and the bore 12, is force-fitted from above into the body 23 up to abut on the shoulder 28. An upper section 30 of this tree 29 protrudes above the end upper 24 of body 23.

Deux rainures longitudinales 31 et 32 diamétralement opposées s'étendent vers le haut le long de l'arbre 29, sensiblement à partir du fond du tronçon d'alésage 26, sans déboucher vers le haut. La profondeur de ces rainures permet l'insertion des extrémités en saillie des ergots 18 et 19 à l'intérieur des rainures 31 et 32, avec les surfaces 15 et 16 des jambes 13 et 14 au contact de deux pans opposés de l'arbre 29.Two longitudinal grooves 31 and 32 diametrically opposite extend upward along the tree 29, substantially from the bottom of the bore section 26, without opening up. The depth of these grooves allows the insertion of the protruding ends of the lugs 18 and 19 inside the grooves 31 and 32, with the surfaces 15 and 16 of legs 13 and 14 in contact with two opposite sides of the shaft 29.

A l'extrémité du tronçon supérieur 30 de l'arbre 29, au dessus des rainures 31 et 32, un jonc élastique circulaire 33 radialement élastique est reçu dans une gorge périphérique de l'arbre 29, de manière à augmenter le frottement entre cet arbre 29 et les surfaces adjacentes de l'alésage 12 et des jambes 13,14.At the end of the upper section 30 of the shaft 29, above the grooves 31 and 32, an elastic ring circular 33 radially elastic is received in a peripheral groove of the shaft 29, so as to increase the friction between this shaft 29 and the adjacent surfaces bore 12 and legs 13.14.

Sur la majeure partie de la longueur de l'arbre 29 s'étend un alésage borgne 34. Cet alésage débouche sur l'extrémité inférieure de celui-ci et a un diamètre légèrement inférieur à celui du tronçon inférieur du corps 23. La lame 3 de tournevis est insérée à frottement par le bas à l'intérieur de cet alésage 34 et bute contre le fond de celui-ci.Over most of the length of the tree 29 extends a blind bore 34. This bore leads to the lower end of it and has a diameter slightly lower than that of the lower body section 23. The screwdriver blade 3 is inserted with friction by the bottom inside this bore 34 and abuts against the bottom of it.

Le fonctionnement du tournevis 1 est maintenant expliqué en regard des figures 1, 2 et 6. Pour débuter un vissage, le tournevis est utilisé en tant que tournevis usuel, dans la configuration de la figure 1. La poignée 4 est alors à la verticale du porte-lame en étant verrouillée dans celui-ci à l'encontre de tout basculement. Plus précisément, la partie inférieure 11 de la poignée 4 est emboítée dans le tronçon d'alésage 26 du porte-lame, tandis que la partie supérieure 30 de l'arbre 29 est insérée dans l'alésage 12. Ce verrouillage peut être qualifié de "positif" car il subsiste lorsque l'utilisateur exerce un couple de vissage/dévissage et/ou une poussée vers le bas et/ou un effort de levier dans un plan radial quelconque, c'est-à-dire pour toute action habituelle exercée lors de l'utilisation d'un tournevis classique.The operation of screwdriver 1 is now explained with reference to Figures 1, 2 and 6. To start a screwing, the screwdriver is used as a screwdriver usual, in the configuration of Figure 1. The handle 4 is then vertical to the blade holder while being locked in it against any tipping. More specifically, the lower part 11 of the handle 4 is fitted into the bore section 26 of the blade holder, while the upper part 30 of the shaft 29 is inserted in bore 12. This lock can be qualified as "positive" because it subsists when the user exercises a screwing / unscrewing couple and / or a pushing down and / or leveraging in a plane any radial, i.e. for any usual action exercised when using a screwdriver classic.

Dans cette situation, les couronnes définies par les surfaces 8 et 24 sont en contact mutuel, et les surfaces extérieures des parties 4 et 5 se raccordent exactement, de sorte que l'ensemble 6, 20, 23 a l'aspect d'un manche de tournevis classique, sans élément saillant.In this situation, the crowns defined by surfaces 8 and 24 are in mutual contact, and the outer surfaces of parts 4 and 5 connect exactly, so that the set 6, 20, 23 looks a classic screwdriver handle, without protruding element.

Pour effectuer l'essentiel du vissage, la poignée 4 entraíne en rotation le porte-lame grâce à la forme en six-pans de l'alésage 12 et de l'arbre 29 et éventuellement à la coopération des ergots 18 et 19 et des rainures 31 et 32.To carry out most of the screwing, the handle 4 rotates the blade holder thanks to the shape hex of bore 12 and shaft 29 and possibly to the cooperation of the lugs 18 and 19 and the grooves 31 and 32.

On remarque que, dans cette position, si l'on frappe sur le sommet du manche, le choc se transmet directement au porte-lame via les surfaces en contact 8 et 24, sans risquer de détériorer le mécanisme interne de basculement.We notice that, in this position, if we hits the top of the handle, the shock is transmitted directly to the blade holder via the contacting surfaces 8 and 24, without risk of damaging the internal mechanism of tilting.

Après que l'opérateur a effectué un vissage grossier, il désire exercer un couple élevé sur la vis. Pour cela, la poignée 4 est alors déverrouillée, en maintenant fixe le porte-lame et en tirant vers le haut la poignée 4. Les ergots 18 et 19 glissent dans les rainures 31 et 32 jusqu'à venir en butée à l'extrémité supérieure de celles-ci. La partie supérieure de l'arbre 29 se trouvant alors entièrement entre les jambes 13 et 14, la poignée 4 peut être basculée autour de l'axe horizontal Y-Y' défini par les ergots 18 et 19, comme le montre la figure 6. Cette partie 4 constitue ainsi un bras de levier, et il est aisé d'exercer un couple élevé sur la vis, transmis au porte-lame 5 via les surfaces 15 et 16.After the operator has screwed coarse, he wants to exert a high torque on the screw. For this, the handle 4 is then unlocked, in now attaching the blade holder and pulling up the handle 4. The pins 18 and 19 slide in the grooves 31 and 32 until they stop at the end superior of these. The upper part of the tree 29 then lying entirely between the legs 13 and 14, the handle 4 can be tilted around the axis horizontal Y-Y 'defined by lugs 18 and 19, as the shows figure 6. This part 4 thus constitutes an arm lever, and it's easy to exert a high torque on the screw, transmitted to the blade holder 5 via surfaces 15 and 16.

Il est à noter que comme les jambes 13 et 14 sont très courtes au-delà des ergots 18 et 19, elles ne font pas saillie par rapport au porte-lame 5 et n'augmentent donc pas l'encombrement de l'outil lorsque la poignée 4 est basculée. De plus, la poignée ne risque pas de basculer inopinément lors de l'utilisation en position "normale".It should be noted that as the legs 13 and 14 are very short beyond lugs 18 and 19, they do not not protruding from the blade holder 5 and do not increase therefore not the size of the tool when the handle 4 is flipped. In addition, there is no risk of the handle tipping over unexpectedly when used in the "normal" position.

La figure 7 représente une variante de porte-lame dans laquelle est incorporé un cliquet réversible 35. Ce cliquet a une structure générale classique, avec un stator constitué par le corps 23, un rotor 36 qui présente une surface verticale plane 37 s'étendant suivant une corde, un coin mobile 38, un ressort 39 de sollicitation de ce coin vers une extrémité ou l'autre de la surface 37, et une bague de sélection 40 qui porte intérieurement un ergot 41 d'attaque du ressort. La bague 40 est montée rotative à l'extrémité inférieure du corps 23 au moyen d'un jonc élastique circulaire 42, et sa rotation dans un sens ou dans l'autre définit le sens actif du cliquet.Figure 7 shows a variant of blade holder in which is incorporated a reversible pawl 35. This ratchet has a classic general structure, with a stator constituted by the body 23, a rotor 36 which has a flat vertical surface 37 extending along a cord, a movable wedge 38, a spring 39 for biasing this corner towards one end or the other of the surface 37, and a selection ring 40 which internally carries a lug 41 for attacking the spring. The ring 40 is mounted rotatable at the lower end of the body 23 by means of a circular elastic ring 42, and its rotation in a sense or in the other defines the active direction of the ratchet.

Dans cette variante, l'arbre 29 des figures 1 et 2 est venu de matière avec le corps 23. La lame 3 (qui, dans l'exemple représenté, est réversible) traverse librement un orifice central de la bague 40, puis traverse à frottement le rotor 36 et l'arbre 29, jusqu'à buter au fond de l'alésage 34 de cet arbre.In this variant, the shaft 29 of FIGS. 1 and 2 came integrally with the body 23. The blade 3 (which, in the example shown, is reversible) crosses freely a central orifice of the ring 40, then crosses with friction the rotor 36 and the shaft 29, until it stops at bottom of bore 34 of this shaft.

Grâce à cet agencement, lorsque le tournevis est monté et se trouve dans sa position normale analogue à celle de la figure 1, un choc vertical exercé sur le manche du tournevis est transmis directement à la lame 3, sans affecter en aucune manière le cliquet 35.Thanks to this arrangement, when the screwdriver is mounted and is in its normal position similar to that of FIG. 1, a vertical shock exerted on the screwdriver handle is transmitted directly to blade 3, without in any way affecting the pawl 35.

Claims (10)

  1. Screwing-unscrewing tool, such as a screwdriver, of the type comprising a handle (2), a driving part (4) and a driven part (5) which have a common axis of rotation (X-X') in a first position of use, pivot means (18,19) for pivoting the driving part (4) relative to the driven part (5), and locking means (11, 26, 12) capable of assuming a positive locking position for the driving part (4) in a position coaxial with the driven part (5) and a release position for the pivot means,
    the driving part (4) comprising a proximal part (6, 9) forming a grip for the handle (2) of the tool;
    the driven part (5) comprising a blade holder,
    the two driving and driven parts (4 and 5) being mounted so as to be coaxially movable relative to each other as far as a predetermined spaced position for releasing the pivot means,
    the pivot means comprising at least one transverse pin (18) which is fixedly attached to one of the two parts, namely the driving and driven parts, and is movable in a longitudinal groove (31, 32) of the other part provided with an abutment, and
    the locking means (11, 26, 12) comprising an interlocking portion between the driving part (4) and the driven part (5);
    characterised in that the handle (2) is made up of two parts, namely the driving part (4) and a complementary distal part (23) fixedly attached to the blade holder.
  2. Tool according to claim 1, characterised in that, in the locking position of the locking means (11, 26, 12), the two parts (4, 23) of the handle (2) are in mutual contact by their respective end sections (8, 24).
  3. Tool according to claim 1 or 2, characterised in that each of the two driving and driven parts (4 and 5) comprises a male extension (11, 30) which fits into a mating recess (26, 12) in the other part.
  4. Tool according to any one of claims 1 to 3, characterised in that the transverse pin (18) is close to the end of the part (4) which carries it.
  5. Tool according to any one of claims 1 to 4, characterised in that the interlocking portion comprises a mutual guide for the two driving and driven parts (4 and 5) in a non-circular form.
  6. Tool according to any one of claims 1 to 5, characterized in that, in said predetermined spaced position, the two driving and driven parts (4 and 5) cooperate by means of flat surfaces parallel to a predetermined tilting plane.
  7. Tool according to any one of claims 1 to 6, characterised in that it comprises braking means, notably a retaining ring (33), adapted to increase the friction between the two driving and driven parts (4 and 5) during their coaxial displacements.
  8. Tool according to any one of claims 1 to 7, characterised in that said proximal part (6, 9) of the grip forming the handle has an outer form of revolution.
  9. Tool according to any one of claims 1 to 8, characterised in that the blade holder comprises an auxiliary device (35) for torque transmission, notably a ratchet.
  10. Tool according to any one of claims 1 to 9, characterized in that it further comprises a blade (3) which abuts on the blade holder, if appropriate above the auxiliary device (35), through which it passes.
EP95918039A 1994-04-20 1995-04-20 Tightening tool such as a screwdriver Expired - Lifetime EP0706442B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9404741A FR2718991B1 (en) 1994-04-20 1994-04-20 Torque transmission mechanism, and screwdriver provided with such a mechanism.
FR9404741 1994-04-20
PCT/FR1995/000521 WO1995029041A1 (en) 1994-04-20 1995-04-20 Tightening tool such as a screwdriver

Publications (2)

Publication Number Publication Date
EP0706442A1 EP0706442A1 (en) 1996-04-17
EP0706442B1 true EP0706442B1 (en) 1998-07-15

Family

ID=9462322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95918039A Expired - Lifetime EP0706442B1 (en) 1994-04-20 1995-04-20 Tightening tool such as a screwdriver

Country Status (5)

Country Link
US (1) US5816119A (en)
EP (1) EP0706442B1 (en)
DE (1) DE69503453T2 (en)
FR (1) FR2718991B1 (en)
WO (1) WO1995029041A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2340199A (en) * 1998-08-03 2000-02-16 Stanley Works Ltd Ratchet mechanism
US6386075B1 (en) * 2001-05-03 2002-05-14 Hsuan-Sen Shiao Swingable handle adapted for rotating a tool bit of a hand tool
US6640672B1 (en) * 2002-08-19 2003-11-04 Gong Fong Enterprise Co., Ltd. Screwdriver
US7523525B2 (en) * 2003-04-22 2009-04-28 Mayhew Steel Products, Inc. Pry bar ergonomic handle
US8032991B2 (en) * 2003-05-05 2011-10-11 Mayhew Steel Products, Inc. Pry bar ergonomic handle
CN1297372C (en) * 2003-08-06 2007-01-31 胡厚飞 Structure-improved tool handle
JP2007276038A (en) * 2006-04-05 2007-10-25 Hitachi Koki Co Ltd Power tool
US20110000345A1 (en) * 2009-07-02 2011-01-06 Duron Plastics Limited Single-bit retractable screwdriver
TWI370761B (en) * 2010-02-08 2012-08-21 Kabo Tool Co Ratcheting tool
CN102152271A (en) * 2010-02-12 2011-08-17 谢智庆 Ratchet type hand tool structure
US8820197B2 (en) * 2012-06-14 2014-09-02 Gong Fong Enterprise Co., Ltd. Hand tool with replacement handle
CN110340831A (en) * 2019-06-10 2019-10-18 射阳县恒工工具有限公司 A kind of monkey wrench

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Publication number Priority date Publication date Assignee Title
US2572444A (en) * 1946-06-21 1951-10-23 Carden Albert Tool handle
US2512232A (en) * 1947-01-17 1950-06-20 Ivan T Hart Reversible ratchet screw driver
US3068728A (en) * 1960-03-07 1962-12-18 Thomas L Shepherd Socket wrench
US4597478A (en) * 1984-07-10 1986-07-01 Easco Corporation Ratcheting tool with improved support for driven shank
FR2570975A1 (en) * 1984-10-01 1986-04-04 Hartmann Sylvain Manual tightening tool
FR2578772A2 (en) * 1984-10-01 1986-09-19 Hartmann Sylvain Manual clamping tool
US5101696A (en) * 1989-06-23 1992-04-07 Ted Neff Driving tool with dual-position handle and locking means therefor
DE8910673U1 (en) * 1989-09-07 1989-12-07 Fa. Robert Schröder, 5600 Wuppertal Operating handle for screwdriver
CN1061286C (en) * 1994-01-07 2001-01-31 伊兹鲍尔公司 Multi-function driving tool

Also Published As

Publication number Publication date
FR2718991A1 (en) 1995-10-27
FR2718991B1 (en) 1996-07-12
US5816119A (en) 1998-10-06
DE69503453T2 (en) 1999-03-25
EP0706442A1 (en) 1996-04-17
DE69503453D1 (en) 1998-08-20
WO1995029041A1 (en) 1995-11-02

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