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EP1237681B1 - Locking pliers - Google Patents

Locking pliers Download PDF

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Publication number
EP1237681B1
EP1237681B1 EP00981445A EP00981445A EP1237681B1 EP 1237681 B1 EP1237681 B1 EP 1237681B1 EP 00981445 A EP00981445 A EP 00981445A EP 00981445 A EP00981445 A EP 00981445A EP 1237681 B1 EP1237681 B1 EP 1237681B1
Authority
EP
European Patent Office
Prior art keywords
pivot
notch
locking pliers
pliers according
mobile
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 - Lifetime
Application number
EP00981445A
Other languages
German (de)
French (fr)
Other versions
EP1237681A1 (en
Inventor
Jean-Pierre Flavigny
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.)
Facom SA
Original Assignee
Facom SA
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Filing date
Publication date
Application filed by Facom SA filed Critical Facom SA
Publication of EP1237681A1 publication Critical patent/EP1237681A1/en
Application granted granted Critical
Publication of EP1237681B1 publication Critical patent/EP1237681B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/06—Joints
    • B25B7/10—Joints with adjustable fulcrum
    • 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
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
    • B25B7/123—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears with self-locking toggle levers

Definitions

  • Clamps of this type allow to exercise for a long time duration, without operator intervention, a large clamping force on a object, or more frequently on two objects to be assembled.
  • the clamping force is obtained by slightly crossing the alignment of the toggle joint by adjusting the elasticity of the parts of the vice grip.
  • the multi-notch light provides a range of opening of the larger jaw than in vise grips where the first pivot has a position single fixed.
  • an operator ensures a rough preset of the opening jaws by positioning the first pivot in a selected notch, the fine adjustment being ensured by changing the position of the rear knee support point the along the fixed handle, for example by means of a screw.
  • multi-notch pliers typically have four or five notches for adjusting the position of the first pivot.
  • the invention aims to solve these problems by providing a vise grips of the aforementioned type and whose presetting of the opening of the jaws is more easier and faster.
  • the subject of the invention is a vise grip of the aforementioned type, characterized in that said light comprises only two notches, namely a first notch and a second notch in which the pivot can pass from the first notch, by pivoting in a first direction of the moving crew around of the rear knee support point on the fixed equipment, when applying an effort tending to bring the handles of the vice grip closer while the knee pad is freely in substantially aligned position.
  • Figure 1 schematically illustrates a vise grip 1 which includes essentially a fixed crew 2 and a mobile crew 3.
  • Stationary equipment 2 is rigid and has a generally elongated shape with a distal or front end part 4 constituting a fixed jaw, a part proximal or rear 5 constituting a fixed handle, and an intermediate part 6 link.
  • the intermediate part 6 has a U-shaped cross section and has thus two side yokes 7 of which only one is visible in FIG. 1.
  • the rear end of the arm 15 can pivot at 17 against the end front of the screw 18, so that the arm 15 forms a connecting rod.
  • the connecting rod 15 and the part of the lever 12 which extends between the second pivot 13 and the third pivot 16 form in known manner a toggle 20, which is supported in 17 on the fixed assembly 2 and by the second pivot 13 on the jaw movable 9, and which can be actuated by the movable handle 14.
  • the moving element 3 further comprises a trigger 21 of release by breaking of the toggle joint 20, in the form of an auxiliary lever articulated on lever 12 and one front end of which is intended to bear on an eccentric part 22 of the connecting rod 15.
  • a helical tension spring 24 extends between the fixed handle 5 and the lower rear vertex of the movable jaw 9, to recall jaws 4 and 9 in open position.
  • Pivot 10 is fitted into the upper rear vertex of the jaw mobile 9 and its ends are received in identical lights 26 arranged opposite each other in each flange 7 of the connecting part 6 of the fixed crew 2.
  • the lights 26 have a general shape in the heart, of which the two lobes, oriented towards the front of the vise grip 1, form an upper notch 27 and a notch lower 28.
  • the upper notch 27 is partially delimited by a lower ramp surface 30 convex, while the lower notch 28 is partially delimited by a surface of upper ramp 31 concave.
  • the ramp surfaces 30 and 31, on the one hand, are join at the front of the light 26 by forming a point 32 directed towards the rear, and on the other hand, are connected to the rear of the light 26 by a surface concave 33 regular.
  • the average lines L1 and L2 of surfaces 30 and 31 form an angle a of about 90 ° therebetween.
  • the ramp surface 30 is oriented towards the lower notch 28 and the ramp surface 31 is oriented towards the upper notch 27.
  • a helical compression spring 36 is supported by its rear end on the fixed assembly 2, and by its front end on the pivot 10 via a stirrup 37.
  • the stirrup 37 encloses the upper rear apex of the movable jaw 9 and is crossed by the pivot 10.
  • the spring 36 is notably more powerful than the traction spring 24.
  • the pivot 10 is positioned in the upper notch 27 which corresponds to a smaller opening of jaws 4 and 9.
  • the knee brace 20 then freely takes up its substantially aligned position shown in Figure 1, i.e. without elastic deformation of the parts constituting the toggle joint 20.
  • the lever 12 and the connecting rod 15 then behave as a one-piece assembly tending to pivot around the fulcrum 17 of the connecting rod 15 on the fixed crew 2.
  • the pivot 10 then tends to move downward relative to the moving assembly 2 and bears on the ramp surfaces 30 of the notches 27. These surfaces 30 then exert a reaction force on the pivot 10, one of which component R (figure 2) is directed towards the rear of the vice grip.
  • the pivot 10 thus travels down the ramp surface 30 down to what it reaches the tip 32 as shown in FIG. 3.
  • the pivot 10 which always tends to move away from the bottom of the moving part 2, leaves the ramp surface 30 and is pushed back by the spring 36 against the ramp surface 31 which guides the pivot 10 to the bottom of the notch 28.
  • the operator can therefore change the pivot 10 from notch 27 to notch 28 by simply tightening the handles 5 and 14 with one hand.
  • the operator can ensure the transition from notch 28 to notch 27 while taking the vise grip with one hand which grips the connecting part 6 of the crew fixed 2 and the actuating lever 12 in the vicinity of the movable jaw 9.
  • the operator can pass the pivot 10 of the notch 27 to notch 28 and vice versa, only by changing the position of his hand along the fixed 2 and mobile 3 crews.
  • Fine adjustment of this opening and application of a clamping force on, for example, two objects to be assembled, are carried out in a conventional manner.
  • the surface 33 limits the movement of the pivot 10 and the lets pass freely.
  • the surface 33 can be adapted to serve guide surface of the pivot 10 during its passage from one notch to another.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Description

La présente invention concerne une pince-étau, comprenant

  • un équipage fixe comprenant à une extrémité avant un mors fixe et à une extrémité arrière une poignée fixe,
  • un équipage mobile comprenant à une extrémité avant un mors mobile, monté sur l'équipage fixe au moyen d'un pivot, et à une extrémité arrière une poignée mobile,
  • une genouillère prenant appui en un point arrière sur l'équipage fixe et en un point avant sur le mors mobile, et actionnable par la poignée mobile, et
  • au moins une lumière recevant le pivot et comprenant plusieurs crans de positionnement de ce dernier.
The present invention relates to a vise grip, comprising
  • a fixed assembly comprising at a front end a fixed jaw and at a rear end a fixed handle,
  • a movable assembly comprising at a front end a movable jaw, mounted on the fixed assembly by means of a pivot, and at a rear end a movable handle,
  • a toggle bearing at a rear point on the fixed assembly and at a front point on the movable jaw, and actuable by the movable handle, and
  • at least one light receiving the pivot and comprising several positioning notches of the latter.

Les pinces de ce type (voir par exemple FR-A-2288589) permettent d'exercer pendant une longue durée, sans intervention de l'opérateur, une force de serrage importante sur un objet, ou plus fréquemment sur deux objets à assembler.Clamps of this type (see for example FR-A-2288589) allow to exercise for a long time duration, without operator intervention, a large clamping force on a object, or more frequently on two objects to be assembled.

La force de serrage est obtenue par un léger franchissement de l'alignement de la genouillère en jouant sur l'élasticité des pièces de la pince-étau.The clamping force is obtained by slightly crossing the alignment of the toggle joint by adjusting the elasticity of the parts of the vice grip.

La lumière à crans multiples permet d'offrir une plage d'ouverture des mors plus étendue que dans les pinces-étaux où le premier pivot a une position unique fixée.The multi-notch light provides a range of opening of the larger jaw than in vise grips where the first pivot has a position single fixed.

En pratique, un opérateur assure un préréglage grossier de l'ouverture des mors en positionnant le premier pivot dans un cran choisi, le réglage fin étant assuré par modification de la position du point d'appui arrière de la genouillère le long de la poignée fixe, par exemple au moyen d'une vis.In practice, an operator ensures a rough preset of the opening jaws by positioning the first pivot in a selected notch, the fine adjustment being ensured by changing the position of the rear knee support point the along the fixed handle, for example by means of a screw.

Généralement, les pinces-étaux à crans multiples présentent quatre ou cinq crans de réglage de la position du premier pivot.Typically, multi-notch pliers have four or five notches for adjusting the position of the first pivot.

On constate en pratique qu'il est difficile de positionner le premier pivot dans un cran choisi. Ainsi, l'opération de préréglage de l'ouverture des mors est délicate et impose toujours l'utilisation des deux mains de l'opérateur.We notice in practice that it is difficult to position the first pivot in a selected notch. Thus, the operation for presetting the opening of the bit is delicate and always requires the use of both hands of the operator.

L'invention a pour but de résoudre ces problèmes en fournissant une pince-étau du type précité et dont le préréglage de l'ouverture des mors soit plus facile et plus rapide.The invention aims to solve these problems by providing a vise grips of the aforementioned type and whose presetting of the opening of the jaws is more easier and faster.

A cet effet, l'invention a pour objet une pince-étau du type précité, caractérisée en ce que ladite lumière ne comprend que deux crans , à savoir un premier cran et un deuxième cran dans lequel le pivot peut passer depuis le premier cran, par pivotement dans un premier sens de l'équipage mobile autour du point arrière d'appui de la genouillère sur l'équipage fixe, lorsqu'on applique un effort tendant à rapprocher les poignées de la pince-étau alors que la genouillère est librement en position sensiblement alignée.To this end, the subject of the invention is a vise grip of the aforementioned type, characterized in that said light comprises only two notches, namely a first notch and a second notch in which the pivot can pass from the first notch, by pivoting in a first direction of the moving crew around of the rear knee support point on the fixed equipment, when applying an effort tending to bring the handles of the vice grip closer while the knee pad is freely in substantially aligned position.

Selon des modes particuliers de réalisation, la pince-étau peut comprendre l'une ou plusieurs des caractéristiques suivantes, prise(s) isolément ou selon toutes les combinaisons techniquement possibles :

  • le premier cran est délimité en partie par une première surface qui forme rampe de dégagement du pivot de ce premier cran vers le deuxième cran lorsqu'on applique un effort tendant à rapprocher les poignées de la pince-étau et que la genouillère est librement en position sensiblement alignée.
  • ladite première surface a un profil convexe.
  • le pivot peut passer du deuxième cran au premier cran; par pivotement dans un deuxième sens de l'équipage mobile autour du point arrière d'appui de la genouillère sur l'équipage fixe, lorsqu'on applique au voisinage des mors un effort tendant à rapprocher l'équipage mobile de l'équipage fixe, le deuxième sens de pivotement étant opposé au premier sens de pivotement.
  • le deuxième cran est délimité en partie par une deuxième surface formant rampe de dégagement du pivot de ce deuxième cran vers le premier cran lorsqu'on exerce sur la pince-étau au voisinage des mors un effort tendant à rapprocher l'équipage mobile de l'équipage fixe.
  • ladite deuxième surface a un profil concave.
  • lesdites première et deuxième surfaces sont des surfaces permettant le dégagement du pivot d'un cran vers l'autre et inversement par actionnement de la pince-étau d'une seule main.
  • lesdites première et deuxième surfaces se rejoignent en formant sensiblement une pointe.
  • les lignes moyennes des première et deuxième surfaces forment un angle sensiblement égal à 90°.
  • le premier cran correspond à une ouverture plus réduite des mors et le deuxième cran correspond à une ouverture plus importante des mors.
  • la lumière comporte une surface arrière de guidage du pivot.
  • ladite lumière à deux crans a une forme générale en coeur dont les lobes forment lesdits crans.
  • la pince-étau comprend des moyens élastiques de rappel du pivot au fond des crans.
  • la pointe du coeur est orientée vers l'arrière, et les moyens élastiques de rappel. comprennent un ressort hélicoïdal comprimé entre un organe porté par le pivot et un point de l'équipage fixe situé en arrière de cet organe.
  • la pince-étau comprend un ressort de rappel des mors en position d'ouverture.
  • le ressort de rappel des mors en position d'ouverture est situé entre le ressort hélicoïdal de rappel du pivot au fond des crans et la poignée mobile.
  • la genouillère comprend, d'une part, une partie avant d'un levier d'actionnement articulé sur le mors mobile et dont une partie arrière forme la poignée mobile, et d'autre part une bielle articulée par l'avant en un point intermédiaire du levier d'actionnement et prenant appui en un point arrière sur l'équipage fixe.
According to particular embodiments, the vice grip may include one or more of the following characteristics, taken alone or in any technically possible combination:
  • the first notch is delimited in part by a first surface which forms a ramp for releasing the pivot from this first notch towards the second notch when a force is applied tending to bring the handles of the vise grips together and the knee lever is freely in position substantially aligned.
  • said first surface has a convex profile.
  • the pivot can pass from the second notch to the first notch; by pivoting in a second direction of the moving element around the rear point of support of the toggle joint on the fixed element, when a force is applied in the vicinity of the jaws tending to bring the moving element closer to the fixed element, the second direction of pivoting being opposite to the first direction of pivoting.
  • the second notch is delimited in part by a second surface forming a ramp for releasing the pivot from this second notch towards the first notch when an effort is exerted on the vice grip in the vicinity of the jaws tending to bring the mobile assembly closer to the fixed crew.
  • said second surface has a concave profile.
  • said first and second surfaces are surfaces allowing the release of the pivot from one notch to the other and vice versa by actuation of the vice grip with one hand.
  • said first and second surfaces meet by forming a substantially point.
  • the middle lines of the first and second surfaces form an angle substantially equal to 90 °.
  • the first notch corresponds to a smaller opening of the jaws and the second notch corresponds to a larger opening of the jaws.
  • the lumen has a back surface for guiding the pivot.
  • said lumen with two notches has a general shape in the heart, the lobes of which form said notches.
  • the vice grip comprises elastic means for returning the pivot to the bottom of the notches.
  • the tip of the heart is oriented towards the rear, and the elastic return means. comprise a helical spring compressed between a member carried by the pivot and a point of the stationary equipment situated behind this member.
  • the vise grip includes a jaw return spring in the open position.
  • the return spring of the jaws in the open position is located between the helical return spring of the pivot at the bottom of the notches and the movable handle.
  • the toggle joint comprises, on the one hand, a front part of an actuating lever articulated on the movable jaw and of which a rear part forms the movable handle, and on the other hand a connecting rod articulated from the front at an intermediate point of the actuating lever and bearing at a rear point on the fixed equipment.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et faite en se référant aux dessins annexés, sur lesquels :

  • la figure 1 est une vue schématique en plan d'une pince-étau selon l'invention, le premier pivot étant positionné dans le cran supérieur,
  • la figure 2 est une vue en plan, partielle et agrandie, illustrant le dégagement du premier pivot du cran supérieur,
  • la figure 3 est une vue analogue à la figure 1 illustrant le premier pivot dans une position intermédiaire entre le cran supérieur et le cran inférieur,
  • la figure 4 est une vue analogue à la figure 1 illustrant le premier pivot engagé dans le cran inférieur.
The invention will be better understood on reading the description which follows, given only by way of example, and made with reference to the appended drawings, in which:
  • FIG. 1 is a schematic plan view of a vise grip according to the invention, the first pivot being positioned in the upper notch,
  • FIG. 2 is a plan view, partial and enlarged, illustrating the release of the first pivot from the upper notch,
  • FIG. 3 is a view similar to FIG. 1 illustrating the first pivot in an intermediate position between the upper notch and the lower notch,
  • Figure 4 is a view similar to Figure 1 illustrating the first pivot engaged in the lower notch.

La figure 1 illustre schématiquement une pince-étau 1 qui comprend essentiellement un équipage fixe 2 et un équipage mobile 3.Figure 1 schematically illustrates a vise grip 1 which includes essentially a fixed crew 2 and a mobile crew 3.

L'équipage fixe 2 est rigide et a une forme générale allongée avec une partie d'extrémité distale ou avant 4 constituant un mors fixe, une partie proximale ou arrière 5 constituant une poignée fixe, et une partie intermédiaire 6 de liaison.Stationary equipment 2 is rigid and has a generally elongated shape with a distal or front end part 4 constituting a fixed jaw, a part proximal or rear 5 constituting a fixed handle, and an intermediate part 6 link.

La partie intermédiaire 6 a une section transversale en U et présente ainsi deux chapes latérales 7 dont une seule est visible sur la figure 1.The intermediate part 6 has a U-shaped cross section and has thus two side yokes 7 of which only one is visible in FIG. 1.

L'équipage mobile 3 comprend essentiellement :

  • un mors mobile 9 de forme générale triangulaire, dont le sommet arrière supérieur est articulé à la partie de liaison 6 par un premier pivot 10,
  • un levier d'actionnement 12, dont l'extrémité avant est reliée par un deuxième pivot 13 au sommet arrière inférieur du mors mobile 9 et dont l'extrémité arrière forme une poignée mobile 14, et
  • un bras 15 dont l'extrémité avant est articulée en un point intermédiaire du levier 12 par un troisième pivot 16, et dont l'extrémité arrière prend appui en 17 sur l'extrémité avant d'une vis 18, qui est reçue dans un taraudage de la poignée fixe 5 pour régler la position du point d'appui 17 le long de la poignée fixe 5.
The moving equipment 3 essentially comprises:
  • a movable jaw 9 of generally triangular shape, the upper rear vertex of which is articulated to the connecting part 6 by a first pivot 10,
  • an actuating lever 12, the front end of which is connected by a second pivot 13 to the lower rear apex of the movable jaw 9 and the rear end of which forms a movable handle 14, and
  • an arm 15 whose front end is articulated at an intermediate point of the lever 12 by a third pivot 16, and whose rear end is supported at 17 on the front end of a screw 18, which is received in a thread of the fixed handle 5 to adjust the position of the fulcrum 17 along the fixed handle 5.

L'extrémité arrière du bras 15 peut pivoter en 17 contre l'extrémité avant de la vis 18, si bien que le bras 15 forme une bielle.The rear end of the arm 15 can pivot at 17 against the end front of the screw 18, so that the arm 15 forms a connecting rod.

La bielle 15 et la partie du levier 12 qui s'étend entre le deuxième pivot 13 et le troisième pivot 16 forment de manière connue une genouillère 20, qui prend appui en 17 sur l'équipage fixe 2 et par le deuxième pivot 13 sur le mors mobile 9, et qui peut être actionnée par la poignée mobile 14.The connecting rod 15 and the part of the lever 12 which extends between the second pivot 13 and the third pivot 16 form in known manner a toggle 20, which is supported in 17 on the fixed assembly 2 and by the second pivot 13 on the jaw movable 9, and which can be actuated by the movable handle 14.

L'équipage mobile 3 comprend en outre une gâchette 21 de déblocage par brisure de la genouillère 20, sous forme d'un levier auxiliaire articulé sur le levier 12 et dont une extrémité avant est destinée à prendre appui sur une partie excentrée 22 de la bielle 15.The moving element 3 further comprises a trigger 21 of release by breaking of the toggle joint 20, in the form of an auxiliary lever articulated on lever 12 and one front end of which is intended to bear on an eccentric part 22 of the connecting rod 15.

Un ressort hélicoïdal 24 de traction s'étend entre la poignée fixe 5 et le sommet arrière inférieur du mors mobile 9, pour rappeler les mors 4 et 9 en position d'ouverture.A helical tension spring 24 extends between the fixed handle 5 and the lower rear vertex of the movable jaw 9, to recall jaws 4 and 9 in open position.

Le pivot 10 est emmanché dans le sommet arrière supérieur du mors mobile 9 et ses extrémités sont reçues dans des lumières 26 identiques ménagées l'une en regard de l'autre dans chaque flasque 7 de la partie de liaison 6 de l'équipage fixe 2. Pivot 10 is fitted into the upper rear vertex of the jaw mobile 9 and its ends are received in identical lights 26 arranged opposite each other in each flange 7 of the connecting part 6 of the fixed crew 2.

Les lumières 26 ont une forme générale en coeur, dont les deux lobes, orientés vers l'avant de la pince-étau 1, forment un cran supérieur 27 et un cran inférieur 28.The lights 26 have a general shape in the heart, of which the two lobes, oriented towards the front of the vise grip 1, form an upper notch 27 and a notch lower 28.

Comme illustré plus en détail par la figure 2, pour chaque lumière 26, le cran supérieur 27 est délimité en partie par une surface de rampe inférieure 30 convexe, tandis que le cran inférieur 28 est délimité en partie par une surface de rampe supérieure 31 concave. Les surfaces de rampe 30 et 31, d'une part, se rejoignent à l'avant de la lumière 26 en formant une pointe 32 dirigée vers l'arrière, et d'autre part, sont reliées à l'arrière de la lumière 26 par une surface concave 33 régulière. Les lignes moyennes L1 et L2 des surfaces 30 et 31 forment entre elles un angle a d'environ 90°. La surface de rampe 30 est orientée vers le cran inférieur 28 et la surface de rampe 31 est orientée vers le cran supérieur 27.As illustrated in more detail in FIG. 2, for each light 26, the upper notch 27 is partially delimited by a lower ramp surface 30 convex, while the lower notch 28 is partially delimited by a surface of upper ramp 31 concave. The ramp surfaces 30 and 31, on the one hand, are join at the front of the light 26 by forming a point 32 directed towards the rear, and on the other hand, are connected to the rear of the light 26 by a surface concave 33 regular. The average lines L1 and L2 of surfaces 30 and 31 form an angle a of about 90 ° therebetween. The ramp surface 30 is oriented towards the lower notch 28 and the ramp surface 31 is oriented towards the upper notch 27.

Un ressort hélicoïdal 36 de compression prend appui par son extrémité arrière sur l'équipage fixe 2, et par son extrémité avant sur le pivot 10 par l'intermédiaire d'un étrier 37. L'étrier 37 enserre le sommet arrière supérieur du mors mobile 9 et est traversé par le pivot 10. Le ressort 36 est notablement plus puissant que le ressort 24 de traction.A helical compression spring 36 is supported by its rear end on the fixed assembly 2, and by its front end on the pivot 10 via a stirrup 37. The stirrup 37 encloses the upper rear apex of the movable jaw 9 and is crossed by the pivot 10. The spring 36 is notably more powerful than the traction spring 24.

Sur la figure 1, le pivot 10 est positionné dans le cran supérieur 27 qui correspond à une ouverture moins importante des mors 4 et 9.In FIG. 1, the pivot 10 is positioned in the upper notch 27 which corresponds to a smaller opening of jaws 4 and 9.

Si l'opérateur souhaite positionner le pivot 10 dans le cran inférieur 28, il exerce d'une seule main sur les poignées 5 et 14 un effort de rapprochement de celles-ci. Aucun objet à serrer n'étant présent entre les mors 4 et 9, la genouillère 20 prend alors librement sa position sensiblement alignée représentée sur la figure 1, c'est à dire sans déformation élastique des pièces constituant la genouillère 20. Le levier 12 et la bielle 15 se comportent alors comme un ensemble monobloc tendant à pivoter autour du point 17 d'appui de la bielle 15 sur l'équipage fixe 2.If the operator wishes to position the pivot 10 in the lower notch 28, it exerts with one hand on the handles 5 and 14 an approximation effort of these. No object to be clamped being present between jaws 4 and 9, the knee brace 20 then freely takes up its substantially aligned position shown in Figure 1, i.e. without elastic deformation of the parts constituting the toggle joint 20. The lever 12 and the connecting rod 15 then behave as a one-piece assembly tending to pivot around the fulcrum 17 of the connecting rod 15 on the fixed crew 2.

Le pivot 10 tend alors à se déplacer vers le bas par rapport à l'équipage mobile 2 et prend appui sur les surfaces de rampe 30 des crans 27. Ces surfaces 30 exercent alors une force de réaction sur le pivot 10 dont une composante R (figure 2) est dirigée vers l'arrière de la pince-étau. The pivot 10 then tends to move downward relative to the moving assembly 2 and bears on the ramp surfaces 30 of the notches 27. These surfaces 30 then exert a reaction force on the pivot 10, one of which component R (figure 2) is directed towards the rear of the vice grip.

Ainsi, le pivot 10 se dégage alors du fond du cran 27 sous l'effet de la composante R qui s'oppose à l'action du ressort de compression 36.Thus, the pivot 10 then emerges from the bottom of the notch 27 under the effect of the component R which opposes the action of the compression spring 36.

Le pivot 10 parcourt ainsi la surface de rampe 30 vers le bas jusqu'à ce qu'il atteigne la pointe 32 comme représenté sur la figure 3.The pivot 10 thus travels down the ramp surface 30 down to what it reaches the tip 32 as shown in FIG. 3.

Ensuite, le pivot 10, qui tend toujours à s'éloigner vers le bas de l'équipage mobile 2, quitte la surface de rampe 30 et est repoussé par le ressort 36 contre la surface de rampe 31 qui guide le pivot 10 jusqu'au fond du cran 28.Then, the pivot 10, which always tends to move away from the bottom of the moving part 2, leaves the ramp surface 30 and is pushed back by the spring 36 against the ramp surface 31 which guides the pivot 10 to the bottom of the notch 28.

L'opérateur peut donc faire passer le pivot 10 du cran 27 au cran 28 par simple serrage d'une seule main des poignées 5 et 14.The operator can therefore change the pivot 10 from notch 27 to notch 28 by simply tightening the handles 5 and 14 with one hand.

Pour faire passer le premier pivot 10 du cran inférieur 28 au cran supérieur 27, il suffit d'exercer entre la partie de liaison 6 et la partie avant du levier 12, et notamment à l'aplomb du pivot 10, un effort tendant à les rapprocher. Le pivot 10 tend alors à se déplacer vers le haut et la surface de rampe 31 assure le dégagement du pivot 10 du cran 28 contre l'action du ressort 36, jusqu'à ce que le pivot 10 atteigne la pointe 32, après quoi le ressort de compression 36 ramène le pivot 10 au fond du cran 27 supérieur.To pass the first pivot 10 from the lower notch 28 to the notch upper 27, it suffices to exercise between the connecting part 6 and the front part of the lever 12, and in particular perpendicular to pivot 10, an effort tending to closer. The pivot 10 then tends to move upwards and the surface of ramp 31 ensures the release of the pivot 10 of the notch 28 against the action of the spring 36, until the pivot 10 reaches the point 32, after which the spring of compression 36 brings back the pivot 10 at the bottom of the upper notch 27.

L'opérateur peut assurer le passage du cran 28 au cran 27 en tenant la pince-étau d'une seule main qui enserre la partie de liaison 6 de l'équipage fixe 2 et le levier d'actionnement 12 au voisinage du mors mobile 9.The operator can ensure the transition from notch 28 to notch 27 while taking the vise grip with one hand which grips the connecting part 6 of the crew fixed 2 and the actuating lever 12 in the vicinity of the movable jaw 9.

Cependant, il est toujours possible d'utiliser les deux mains. Une première main se place alors au niveau des poignées 5 et 14 tandis que l'autre main exerce l'effort de rapprochement au voisinage des mors 4 et 9However, it is still possible to use both hands. A first hand is then placed at the level of handles 5 and 14 while the other hand exerts the approximation effort in the vicinity of jaws 4 and 9

Ainsi, l'opérateur peut, faire passer d'une seule main le pivot 10 du cran 27 au cran 28 et vice-versa, uniquement en modifiant la position de sa main le long des équipages fixe 2 et mobile 3.Thus, the operator can pass the pivot 10 of the notch 27 to notch 28 and vice versa, only by changing the position of his hand along the fixed 2 and mobile 3 crews.

Le préréglage de l'ouverture des mors 4 et 9 est donc particulièrement aisé. Il nécessite uniquement un léger espacement entre les mors.Presetting the opening of jaws 4 and 9 is therefore particularly easy. It only requires a slight spacing between the jaws.

Le réglage fin de cette ouverture et l'application d'une force de serrage sur, par exemple, deux objets à assembler, s'effectuent de manière classique.Fine adjustment of this opening and application of a clamping force on, for example, two objects to be assembled, are carried out in a conventional manner.

Il est à noter cependant que du fait de la présence de seulement deux crans 27 et 28 de réglage de la position du premier pivot 10, toutes les positions de ce premier pivot 10 sont stables et permettent à la pince-étau d'avoir une capacité de serrage satisfaisante. It should be noted, however, that due to the presence of only two notches 27 and 28 for adjusting the position of the first pivot 10, all positions of this first pivot 10 are stable and allow the vise grip to have a satisfactory clamping capacity.

On notera que la surface 33 limite le mouvement du pivot 10 et le laisse passer librement. Cependant, la surface 33 peut être adaptée pour servir de surface de guidage du pivot 10 lors de son passage d'un cran à l'autre.It will be noted that the surface 33 limits the movement of the pivot 10 and the lets pass freely. However, the surface 33 can be adapted to serve guide surface of the pivot 10 during its passage from one notch to another.

Claims (17)

  1. Locking pliers (1) comprising:
    a fixed assembly (2) consisting of a fixed jaw (4) at a front end and a fixed handle (5) at the rear end,
    a mobile assembly (3) consisting of a mobile jaw (9) at a front end, mounted on the fixed assembly by means of a pivot (10), and a mobile handle (14) at a rear end,
    a knuckle joint (20) bearing at a rear point (17) on the fixed assembly (2) and at a front point (13) on the mobile jaw (9) and adapted to be actuated by the mobile handle (14), and
    at least one elongate hole (26) receiving the pivot (10) and comprising a plurality.of notches (27, 28) for positioning the latter,
       characterised in that said elongate hole (26) comprises only two notches (27, 28), namely a first notch (27) and a second notch (28) into which the pivot (10) can pass from the first notch (27) by pivoting of the mobile assembly in a first direction about the rear point (17) on which the knuckle joint of the fixed assembly bears when a force is applied that tends to move the handles (5, 14) of the locking pliers closer together when the knuckle joint is freely in a substantially aligned position.
  2. Locking pliers according to claim 1, characterised in that the first notch (27) is partly delimited by a first surface (30) that forms a ramp for movement of the pivot (10) from the first notch (27) towards the second notch (28) when a force is applied that tends to move the handles (5, 14) of the locking pliers closer together and the knuckle joint is freely in a substantially aligned position.
  3. Locking pliers according to claim 2, characterised in that said first surface (30) has a convex profile.
  4. Locking pliers according to any one of claims 1 to 3, characterised in that the pivot (10) can pass from the second notch (28) to the first notch (27) by pivoting of the mobile assembly in a second direction about the rear point (17) at which the knuckle joint bears on the fixed assembly when there is applied in the vicinity of the jaws a force tending to move the mobile assembly and the fixed assembly closer together, the second pivoting direction being opposite to the first pivoting direction.
  5. Locking pliers according to claim 4, characterised in that the second notch (28) is delimited in part by a second surface (31) forming a ramp for movement of the pivot (10) from the second notch (28) towards the first notch (27) when a force is applied to the locking pliers in the vicinity of the jaws (4, 9) that tends to move the mobile assembly and the fixed assembly closer together.
  6. Locking pliers according to claim 5, characterised in that said second surface (31) has a concave profile.
  7. Locking pliers according to claim 2 or claim 3 in conjunction with claim 5 or claim 6, characterised in that said first and second surfaces (30, 31) enable movement of the pivot (10) from one notch towards the other by one-handed actuation of the locking pliers.
  8. Locking pliers according to claim 7 or claim 2 or claim 3 in conjunction with claim 5 or claim 6, characterised in that said first and said second surfaces (30, 31) merge substantially at a point (32).
  9. Locking pliers according to claim 8, characterised in that centre-lines (L1, L2) of the first and second surfaces are at an angle (α) substantially equal to 90°.
  10. Locking pliers according to claim 9, characterised in that the first notch corresponds to a smaller opening of the jaws (4, 9) and the second notch corresponds to a larger opening of the jaws (4, 9).
  11. Locking pliers according to any one of the preceding claims, characterised in that the elongate hole has a rear surface (33) for guiding the pivot (10).
  12. Locking pliers according to any one of the preceding claims, characterised in that said elongate hole (26) with two notches (27, 28) is generally heart-shaped with lobes that form said notches.
  13. Locking pliers according to any one of the preceding claims, characterised in that it includes spring means (36) for spring-loading the pivot (10) towards the bottoms of the notches (27, 28).
  14. Locking pliers according to claim 12 in conjunction with claim 13, characterised in that the point of the heart-shape is oriented towards the rear and in that the spring means comprise a coil spring (36) compressed between a member (37) carried by the pivot (10) and a point on the fixed assembly (2) to the rear of said member (37).
  15. Locking pliers according to any one of claims 1 to 14, characterised in that it includes a spring (24) for spring-loading the jaws (4, 9) towards the open position.
  16. Locking pliers according to claim 14 in conjunction with claim 15, characterised in that the spring (24) for spring-loading the jaws towards the open position is between the coil spring (36) for spring-loading the pivot (10) towards the bottoms of the notches (27, 28) and the mobile handle (14).
  17. Locking pliers according to any one of the preceding claims, characterised in that the knuckle joint (20) comprises, firstly, a front portion of an actuator lever (12) articulated to the mobile jaw (4) and a rear portion of which forms the mobile handle- (14) and, secondly, a link (15) articulated at the front to an intermediate point (16) on the actuator lever (12) and bearing at a rear point (17) on the fixed assembly (2).
EP00981445A 1999-12-13 2000-11-20 Locking pliers Expired - Lifetime EP1237681B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9915692 1999-12-13
FR9915692A FR2802137B1 (en) 1999-12-13 1999-12-13 CLAMP, LOCKING
PCT/FR2000/003220 WO2001043921A1 (en) 1999-12-13 2000-11-20 Locking pliers

Publications (2)

Publication Number Publication Date
EP1237681A1 EP1237681A1 (en) 2002-09-11
EP1237681B1 true EP1237681B1 (en) 2003-09-24

Family

ID=9553184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00981445A Expired - Lifetime EP1237681B1 (en) 1999-12-13 2000-11-20 Locking pliers

Country Status (5)

Country Link
EP (1) EP1237681B1 (en)
AU (1) AU1869201A (en)
DE (1) DE60005558D1 (en)
FR (1) FR2802137B1 (en)
WO (1) WO2001043921A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9492911B2 (en) 2015-01-15 2016-11-15 Milwaukee Electric Tool Corporation Locking pliers with improved adjustment member
USD782891S1 (en) 2015-04-02 2017-04-04 Milwaukee Electric Tool Corporation Locking pliers
USD811186S1 (en) 2014-08-01 2018-02-27 Milwaukee Electric Tool Corporation Pliers with control key

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007032108B4 (en) * 2007-07-10 2009-06-04 Lurch Ag Gripping pliers for household purposes
KR101059051B1 (en) * 2009-05-21 2011-08-24 에스티엑스조선해양 주식회사 Earth cable clamp
TWI472412B (en) * 2012-08-20 2015-02-11 Ming Chieh Wu A pair of pipe pliers with a counterweight structure
TW201603966A (en) * 2014-07-21 2016-02-01 Ming-Jie Wu Clamping device capable of rapidly adjusting clamping force

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1196588B (en) * 1963-06-21 1965-07-08 Dowidat Werke Toggle clamp
US3262343A (en) * 1964-03-27 1966-07-26 Robert W Weller Toggle wrench having automatic abutment adjusting means
FR2288589A2 (en) * 1974-06-26 1976-05-21 Facom Pair of clamping pliers with fixed and pivotal jaws - has locking lever pivotal on extension of pivotal jaw
FR2451804A1 (en) * 1979-03-23 1980-10-17 Roux Joseph Adjustable and lockable pincer wrench - has lever actuated knuckle joint stay on pivotable jaw with release lever
EP0216717B1 (en) * 1985-09-24 1989-12-20 Societe Outillage Roux France (Societe Anonyme) Clamping pliers with self-adjusting jaws

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD811186S1 (en) 2014-08-01 2018-02-27 Milwaukee Electric Tool Corporation Pliers with control key
US9492911B2 (en) 2015-01-15 2016-11-15 Milwaukee Electric Tool Corporation Locking pliers with improved adjustment member
USD782891S1 (en) 2015-04-02 2017-04-04 Milwaukee Electric Tool Corporation Locking pliers

Also Published As

Publication number Publication date
WO2001043921A8 (en) 2002-04-18
AU1869201A (en) 2001-06-25
FR2802137B1 (en) 2002-03-01
EP1237681A1 (en) 2002-09-11
DE60005558D1 (en) 2003-10-30
FR2802137A1 (en) 2001-06-15
WO2001043921A1 (en) 2001-06-21

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