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

Definitions

• the present invention relates to a crossed pliers of the type described in the preamble of claim 1.
• Multi-grip pliers of this type make it possible to produce a stepped guide, and therefore precise and reliable, with two branches produced by cold forging and a plate reported on the protruding branch.
• planar shape of the plate leads to a large thickness of the overlapping branch and to a corresponding thick thickness of the other branch.
• the invention aims to lighten the branches of the clamp. To this end, it has for its object a pliers multipass taken the above type, characterized in that the plate has, in side view, a general shape of ⁇ .
• the pliers according to the invention may include one or more of the features of claims 2 to 9.
• FIG. 1 is a partial view in elevation of a pliers according to the invention
• - Figure 2 is a partial elevational view of the protruding branch of this clamp
• Figure 3 is a partial elevational view of the protruding branch of the clamp;
• Figure 4 is an elevational view of the wafer;
• FIG. 5 is a sectional view along the broken line V-V of Figure 4.
• FIG. 6 is a view of the pliers taken in section along the broken line VI-VI of Figure 1.
• Figures 1 and 6 assumed to be laid flat on a horizontal surface, consists of a projecting branch 2 in one piece obtained by cold forging, shown in the Figure 2, of a split branch 3 also in one piece and obtained by cold forging, shown in Figure 3, of a plate 4 shown in Figures 4 and 5, and a device 5 for controlling jaw opening visible in Figure 6.
• the branch 2 has at its distal end or before a first jaw 6 having an appropriate gripping groove 7. It also comprises, from this jaw, an intermediate region 8 in which a hollow is formed. 9, then a rear or proximal part 10 forming a handle. Conventionally, the part 10 can be coated with a sheath 11 made of plastic or elastomer.
• the jaw 6 and the part 10 have the same thickness E ( Figure 6) and have a generally rectilinear shape, while the region 8 has a reduced thickness and has in elevation ( Figure 2) a generally angled shape whose concavity is turned towards bottom on the drawings.
• the hollow 9 ( Figures 2 and 6) consists of a central recess 12 with a flat bottom whose depth is E / 2 and whose bottom has a circular orifice 13 of diameter Dl.
• This recess 12 is bordered at each longitudinal end by a flat step 14 with a height close to E / 4.
• the steps are limited at their outer ends by respective shoulders 15 which converge strongly towards each other towards the back of the clamp, that is to say upwards.
• Figure 1 In the example shown, the lines D1 and D2 corresponding to these shoulders form an angle of about 50 °.
• each step 14 there projects a substantially frustoconical stud 16 coming from cold forging.
• a hollow 17 is formed under each stud.
• a projection 18 is provided on the inner edge of the proximal step 14. This projection has a proximal face 19 inclined at approximately 45 ° and a distal face 20 substantially vertical, which also delimits the part 12 of one recess.
• the outside surface of the branch 2, namely its lower surface in the illustrated position, is flat except for the two recesses 17.
• the branch 3 also has an outer surface (its upper surface in the position shown) which is planar. It has the thickness E in its front or distal region which defines its jaw 21, as well as in its rear region 22 forming a handle. In its intermediate articulation region 23, the thickness of the branch 3 is E / 2.
• This region 23 is substantially rectilinear in elevation (FIG. 3) and comprises an elongated lumen 24 with several circular notches 25 of diameter D2 less than D1 which interpenetrate, as is conventional in multi-socket pliers.
• the minimum width of the light 24, between the notches 25, is D3 ⁇ D2.
• the handle 22 is coated with a sheath
• the plate 4 has, in elevation view according to Figures 1 and 4, the outline of the hollow 9 of the branch 2, from one shoulder 15 to the other.
• longitudinal section ( Figure 5) it has a shape in ⁇ , that is to say that its two end parts 27, which are planar and apply flat on the respective steps 14, are in a plane offset downward relative to its central part 28, which is also plane.
• Each part 27 is pierced with a circular orifice 29 flaring upwards, while the part 28 is pierced with a circular orifice 30 of diameter D3, bordered above by a shallow circular bowl 31.
• the control device 5 consists of a stage pin 33 having a lower part 34 of diameter D1, an intermediate part 35 of diameter D2, an upper part 36 of diameter D3 and an end portion of smaller diameter.
• the pin 33 crosses from the bottom upwards the orifice 13, the light 24 and the orifice 30.
• a cup 37 is positioned in the bowl 31, a washer 38 is riveted on the upper end of the pin 33, and a spring frustoconical helical 39 is compressed between this washer and the bottom of the cup 37.
• the branch 2 is placed on a horizontal support, with the recess 9 facing upwards, then the part 34 of the pin 33 is inserted into the orifice 13.
• the branch 3 is then placed with its flat face turned upwards and its intermediate region 23 placed on the bottom of part 12 of the recess 9, a notch 25 threading onto part 35. of the pin.
• the plate 4 is then placed on the assembly, so that the part 36 of the pin 33 passes through the orifice 30 and that each stud 16 passes through an orifice 29.
• the cup 37 and the spring 39 are put in place, then the washer 38 is fixed by riveting to the upper end of pin 33.
• the two pins 16 are bolted in the holes 29.
• the washer 38 is pressed until it is retracted into the cup 37 against the spring 39. It is then the part 36 of the pin 33 which is in the light 34, which makes it possible to move the pawn along this light.
• the spring 39 brings the part 35 back into a notch 25 in the slot 24, which defines a fixed articulation pivot of the clamp ( Figure 6).
• the thickness of the branches 2 and 3 can be limited to E, that is to say double the thickness of the zones articulation intermediaries 8 and 23 of the two branches.
• the handles of the two branches have a limited approximation so as to prevent pinching of the user's fingers.
• the stop is provided, for the front notch 25, by the contact of the two jaws and, for the other notches, by the contact of the back of the region 23 with the front edge 20 of the projection 18.
• This projection can moreover, alternatively, also limit the closing of the clamp for the front notch 25.
• the substantially vertical orientation of the edge 20 has the result that even if the user forces the tool towards closing, - this does not result in any stress on the wafer 4 when expelled upwards.

Landscapes

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

Applications Claiming Priority (3)

Publications (2)

Family

ID=8852710

Family Applications (1)

Country Status (6)

Families Citing this family (14)

Family Cites Families (7)

• 2000
  • 2000-07-19 FR FR0009495A patent/FR2811925B1/fr not_active Expired - Fee Related
• 2001
  • 2001-07-06 US US10/332,848 patent/US6880434B2/en not_active Ceased
  • 2001-07-06 DE DE60140544T patent/DE60140544D1/de not_active Expired - Lifetime
  • 2001-07-06 EP EP01984221A patent/EP1303382B1/de not_active Expired - Lifetime
  • 2001-07-06 AU AU2002222918A patent/AU2002222918A1/en not_active Abandoned
  • 2001-07-06 WO PCT/FR2001/002193 patent/WO2002006012A1/fr active Application Filing

Non-Patent Citations (1)

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