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

• the present invention relates to a vise grip, of the type
• 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,
• At least one light receiving the pivot and comprising several positioning notches of the latter.
• the pliers of this type allow to exert for a long time, without operator intervention, a large clamping force on an object, or more frequently on two objects to be assembled.
• the clamping force is obtained by slightly crossing the alignment of the toggle by adjusting the elasticity of the parts of the vice grip.
• the multi-notch light makes it possible to offer a wider opening range of the jaws than in the vice-grips where the first pivot has a single fixed position.
• an operator ensures a rough presetting of the jaw opening by positioning the first pivot in a chosen notch, fine adjustment being ensured by modifying the position of the rear support point of the toggle joint along the fixed handle. , for example by means of a screw.
• multi-clamp pliers have four or five notches for adjusting the position of the first pivot.
• the object of the invention is to solve these problems by providing a vice of the aforementioned type and of which the presetting of the opening of the jaws is easier and faster.
• the subject of the invention is a vise grip of the aforementioned type, characterized in that said lumen 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 assembly around the rear point of support of the toggle joint on the stationary assembly, when a force is applied tending to bring the handles of the vice grip closer while the toggle is freely in the substantially aligned position.
• 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 which tends to bring the handles of the vise grips together and the knee lever is freely in substantially aligned position.
• the pivot can pass from the second notch to the first notch, by pivoting in a second direction of the moving assembly around the rear point of support of the toggle joint on the fixed assembly, when a tensile force is applied in the vicinity of the jaws to bring the moving element closer to the stationary 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 made on the vice grip in the vicinity of the jaws tending to bring the mobile assembly closer to the fixed crew.
• 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.
• 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 light has a rear surface for guiding the pivot.
• Said light with two notches has a general shape in the heart whose lobes form said notches.
• the vice grip comprises elastic means for returning the pivot to the bottom of the notches.
• the vice grip comprises a return spring for the jaws 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 knee lever 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 a point intermediate of the actuating lever and bearing at a rear point on the fixed equipment.
• 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 of the upper notch
• - Figure 3 is a view similar to Figure 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.
• FIG. 1 schematically illustrates a vice grip 1 which essentially comprises a fixed assembly 2 and a movable assembly 3.
• the fixed assembly 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 connecting part 6.
• the intermediate part 6 has a U-shaped cross section and thus has two lateral yokes 7, only one of which is visible in FIG. 1.
• the movable element 3 essentially comprises:
• 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
• the rear end of the arm 15 can pivot at 17 against the front end 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 a known manner a toggle 20, which bears at 17 on the fixed assembly 2 and by the second pivot 13 on the movable jaw 9, which can be actuated by the movable handle 14.
• the movable assembly 3 further comprises a trigger 21 for unlocking by breaking the toggle joint 20, in the form of an auxiliary lever articulated on the 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 apex of the movable jaw 9, to return the jaws 4 and 9 to the open position.
• the pivot 10 is fitted into the upper rear apex of the movable jaw 9 and its ends are received in identical slots 26 arranged opposite one another in each flange 7 of the connecting part 6 of the stationary assembly 2 .
• the apertures 26 have a general shape at the heart, the two lobes of which, facing the front of the vice grip 1, form an upper notch 27 and a lower notch 28.
• the upper notch 27 is delimited in part by a convex lower ramp surface 30, while the lower notch 28 is delimited in part by a concave upper ramp surface 31 .
• the average lines L1 and L2 of the surfaces 30 and 31 form between them an angle ⁇ of approximately 90 °.
• 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 bears by its rear end on the fixed assembly 2, and by its front end on the pivot 10 by means of a stirrup 37.
• the stirrup 37 encloses the upper rear vertex 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 the jaws 4 and 9.
• the toggle 20 then freely takes its substantially aligned position shown in Figure 1, that is to say without elastic deformation of the parts constituting the toggle 20.
• the lever 12 and the connecting rod 15 then behaves like a one-piece assembly tending to pivot around the point 17 of support of the connecting rod 15 on the fixed assembly 2.
• the pivot 10 then tends to move downward relative to the movable element 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 component of which R ( figure 2) is directed towards the rear of the vice grip. 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.
• the pivot 10 thus traverses the ramp surface 30 downwards until 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 pass the pivot 10 from the notch 27 to the notch 28 by simply tightening the handles 5 and 14 with one hand.
• the pivot 10 then tends to move upwards and the ramp surface 31 ensures the release of the pivot 10 from the notch 28 against the action of the spring 36, until the pivot 10 reaches the point 32, after which the compression spring 36 brings the pivot 10 to the bottom of the upper notch 27.
• the operator can ensure the passage from the notch 28 to the notch 27 by holding the vice-grip with one hand which encloses the connection part 6 of the stationary assembly 2 and the actuation lever 12 in the vicinity of the movable jaw 9 However, it is still possible to use both hands. A first hand is then placed at the level of the handles 5 and 14 while the other hand exerts the approximation effort in the vicinity of the jaws 4 and 9
• the operator can, with one hand, pass the pivot 10 from the notch 27 to the notch 28 and vice-versa, only by modifying the position of his hand along the fixed 2 and mobile 3 crews.

Landscapes

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

Applications Claiming Priority (3)

Publications (2)

Family

ID=9553184

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (5)

Family Cites Families (5)

• 1999
  • 1999-12-13 FR FR9915692A patent/FR2802137B1/fr not_active Expired - Fee Related
• 2000
  • 2000-11-20 WO PCT/FR2000/003220 patent/WO2001043921A1/fr not_active Ceased
  • 2000-11-20 EP EP00981445A patent/EP1237681B1/de not_active Expired - Lifetime
  • 2000-11-20 DE DE60005558T patent/DE60005558D1/de not_active Expired - Lifetime
  • 2000-11-20 AU AU18692/01A patent/AU1869201A/en not_active Abandoned

Non-Patent Citations (1)

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