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EP0331927A1 - Pince coupante - Google Patents

Pince coupante Download PDF

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Publication number
EP0331927A1
EP0331927A1 EP89102303A EP89102303A EP0331927A1 EP 0331927 A1 EP0331927 A1 EP 0331927A1 EP 89102303 A EP89102303 A EP 89102303A EP 89102303 A EP89102303 A EP 89102303A EP 0331927 A1 EP0331927 A1 EP 0331927A1
Authority
EP
European Patent Office
Prior art keywords
cutting
roller body
center cutter
particular according
handle
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.)
Granted
Application number
EP89102303A
Other languages
German (de)
English (en)
Other versions
EP0331927B1 (fr
Inventor
Ralf Putsch
Karl Putsch
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.)
Knipex Werk C Gustav Putsch KG
Original Assignee
Knipex Werk C Gustav Putsch KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Knipex Werk C Gustav Putsch KG filed Critical Knipex Werk C Gustav Putsch KG
Priority to AT89102303T priority Critical patent/ATE75177T1/de
Publication of EP0331927A1 publication Critical patent/EP0331927A1/fr
Application granted granted Critical
Publication of EP0331927B1 publication Critical patent/EP0331927B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
    • 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
    • B25B7/08—Joints with fixed 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
    • B26B17/02—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact with jaws operated indirectly by the handles, e.g. through cams or toggle levers

Definitions

  • the invention relates to a center cutter according to the preamble of claim 1.
  • the cutting jaws are each mounted on a bolt.
  • the jaw ends on the handle leg articulate to the handle legs, which are supported one above the other by a commercial bolt.
  • the handle legs form double levers.
  • the shorter lever engages the end of the cutting jaws.
  • Corresponding configurations are relatively complex.
  • the cutting jaws are supported or tied to one another by tabs and a tooth space intervention. From DE-OS 34 27 990 it is known on such a bolt cutter to form the shorter lever arm of the handle leg double lever, that is, the handle leg heads, as mutually supporting, pair-acting, cam-like crank parts. Connected are the handle leg heads over a cross flap. The latter acts on the end bearing bolts of the handle leg heads. This solution is felt to be even more complex.
  • the object of the invention is to increase the cutting performance with simple means in a generic tool while maintaining the classic, crossing overlap, that is, the one-piece design of the handle leg and pliers jaw.
  • the power arm becomes longer while maintaining the basic length of the tool; the joint means are now moved to the head or cutting area.
  • the non-commercial crossover area of the handle legs can act as a guide surface. Accordingly, increased cutting performance is optimized with simple means in that the cutting edges open into the lateral surface of the tooth space intervention.
  • the length of the load arm that is otherwise occupied by the commercial area between the commercial bolt and the cutting edge on this side is now a cutting edge.
  • the construction has proceeded in such a way that a cylindrical roller body forming the tooth gap engagement extends transversely to the wedge-shaped cutting edges in cross-section and is proportionally accommodated in a corresponding penetration cavity formed from two hollow sections in the cutting edges such that an approximately rectangular one There is a transition between the wading edges of the cutting edges ending directly on the roller body and the walls of the cavity sections.
  • This leads to extremely good cutting behavior; higher cutting forces can be applied under the most stable bearing conditions.
  • the penetration cavity formed proportionally in the cutting areas for receiving the roller body can not only be produced in a structurally simple manner (this zone is completely free for processing), but also creates a firm, form-fitting fit due to the increasing enlargement of the supporting surface of the walls for the roller body in the cavity depth Abutment. With increasing closing, which is associated with the occurrence of the cutting forces, this reason, which favors guidance of the roller body, is pressed even more firmly against the lateral surface of the roller body; rather, shear forces causing a jaw shift are absorbed without damage. Last but not least, this is due to the fact that the bevels pass at right angles into the walls of the cavity sections.
  • the grip legs form a throat at hand width distance from the free end of the grip leg, which is at a corresponding distance from the crossover area of the pliers legs, which arched outward from the grip sections extending from this throat run and the free end sections following a second throat take a slightly divergent course. So there are good ergonomic conditions.
  • the invention proposes that the cutting edges pass into the full thickness of the cutting jaws after a jaw tapering step. As a result, the areas of the cutting jaws lying flat against the tabs are significantly wider. The leadership is therefore larger and therefore better. The cutting edges sit practically like strips on the opposite sides of the cutting jaws.
  • the center cutter shown has two handle legs 1, 2, which, crossing one another in the commercial area, continue into a respective cutting jaw 3, 4.
  • Each handle leg 1, 2 is rotatably supported on a special bearing pin 5 or 6.
  • the latter extend on both sides of the axis of symmetry x-x of the side cutter. They lie on a common transverse plane E-E as well as across the cutting jaw swivel plane.
  • the bearing bolts 5, 6 pass through cross-section-adapted through bores of two tabs 7. These plate tabs, which are arranged in pairs and extend in the pivoting plane of the cutting jaws 3, 4 or handle legs 1, 2, grasp the transition region between the cutting jaws 3, 4 and handle legs 1, 2.
  • bearing bolts 5, 6 they have heads on the one hand and rivets on the other hand.
  • the heads are frustoconical in shape, the rivets are rounded.
  • the tabs 7 In the area of the cutting edges 8, 9 of the cutting jaws 3, 4 facing each other, the tabs 7 have a rounded niche 10. The latter has a centering effect on the object to be cut, such as wire.
  • a roller body 11 is embedded between them at the same distance from the bearing bolts 5, 6.
  • the latter forms a kind of tooth space engagement ZL between the cutting jaws 3, 4 and is cylindrical in shape. Its edges are chamfered.
  • the axial length corresponds to the clear distance between the brackets 7 arranged parallel to one another, or more precisely to the thickness of the cutting jaws 3, 4 measured in this direction.
  • the cylindrical roller body 11, which thus extends transversely to the cutting edges 8, 9, sits proportionately in a corresponding manner two cavity sections I, II of the cutting edges 8, 9 formed penetration cavity 12. Since the cutting edges 8, 9 are wedge-shaped and the If the roller body 11 is cylindrical, the cavity sections I, II have a lenticular wall contour (see FIG. 9).
  • the wall of the cavity section I, II increases increasingly until it has its line L of greatest length approximately at the level of the transverse plane EE. From there, the area of the wall decreases again accordingly.
  • this line L lies at least in the cavity sections I, II which form the receptacle of the roller body, at least in the direct connecting line between the central axes yy of the two bearing bolts 5, 6.
  • the roller body 11 even takes this line in the direction of the handle legs 1, 2 exceeding location.
  • the hollow sections I, II in the cutting edges 8, 9 are further assigned such that the roller body 11 partially protrudes over the cutting edge flap edge or the bottom of the recess 10 when the side cutter is open.
  • the opening jaws move in the direction of the object to be cut.
  • the roller body which is supported via its end faces on the inner surfaces of the tabs 7, moves back into its full-area axial support position.
  • the chamfered edges prevent any removal. In the open position, approximately half the cross-sectional area of the roller body is exposed.
  • the cutting edges 8, 9 pass over a clear step 13 into the maximum jaw thickness.
  • This jaw taper stage 13 is located on both sides of the cutting jaws 8, 9. The reduction is approximately 50%.
  • the transition into the thicker section of the cutting jaws 3, 4 is rounded concavely and bears the reference numeral 14.
  • the wedges 8, 9 wedging in connection with the jaw tapering step 13 pass into the blunted bevel 8 'or 9'.
  • the cutting line coincides with the central longitudinal axis x-x of the center cutter on which the roller body moves.
  • the cutting edge angle alpha of the cutting edges 8, 9 is 40 °.
  • the interruption of the cutting flank course according to the gradation 13 brings an area gain for the tab-side guidance of the cutting jaws 3, 4 from the width z. Z corresponds to a little more than the radius of the roller body.
  • the cranked crossing area of the handle legs 1, 2, which is connected behind the tabs 7 on the handle side, is significantly widened compared to the handle and cheek zone, in the interest of large-area guide surfaces 15.
  • the procedure for the formation of the tooth space engagement ZL is such that the roller body 11 is fastened in one of the cavity sections I, II.
  • the attachment can be done by brazing.
  • an embodiment is preferred in such a way that the roller body 11 is assigned to one or the other cutting edge 8, 9, here the cutting edge 9, as an equally forged projection.
  • the protrusion is in the form of a half roller body, divided in the axial direction.
  • the supportive surface area takes into account the movement required to open the mouth, so it is slightly larger than the said half.
  • the jacket wall of the integrally formed roller body 11 continues in FIGS. 10 and 11 as a penetration line, but because of the better understanding of the one-piece design, the fastening line on the fastening jaw side is omitted.
  • the handle legs 1, 2 form abutment spurs 16 that face each other and define the closed position of the cutting edges 8, 9.
  • the opening delimitation is formed by sections 8 ⁇ and 9 ⁇ of the cutting jaw parts lying beyond the penetration cavity 12 on the handle leg side.
  • the length ratio of the cutting jaw 3 or 4 to the handle leg 1 or 2 is about 1:10. Half the length of the cutting edge 8 or 9 is omitted on the lever H.
  • Insulation 17 is applied, preferably shrunk, to the weakly corrugated grip legs 1, 2.
  • the said corrugation of the handle legs is such that the handle legs 1, 2 form a groove 18 on the outside at a hand-width distance from the free end of the handle legs.
  • the throat 18 of both handle legs 1, 2 lies on a common transverse plane.
  • the distance between the throat 18 and the free ends of the handle legs is approximately the same as the distance between the deepest point of the throat 18 and the crossover area K. These distance zones are curved outwards, thus giving the overall grip two more bulbous zones.
  • the insulation 17 ends approximately in the middle of the handle section on the pliers head. As can be seen in the drawing, the free end sections take a slightly diverging course following a second outside throat 19 there. All sections merge into one another.
  • the first throat 18 and the overall bulging section adjoining the handle end enable an optimal gripping posture adapted to the ergonomic conditions of the operating hand, with the thumb root embedded in one or the other first throat 18.
  • the four fingers of the operating hand overlap the curved section of the other handle leg. Since the handle sections have a curvature that corresponds to the curvature of the palm of the hand, high actuation forces can be applied.
  • the barrel shape of the handle which is in any case double in the silhouette, even enables two-hand operation, since the handle sections on both sides of the first throat 18 are of the same length, that is to say both are at a hand's width distance.
  • the handle legs 1, 2 are spaced apart such that fingers projecting into their intermediate space 20 are not pinched.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Scissors And Nippers (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Disintegrating Or Milling (AREA)
EP89102303A 1988-03-05 1989-02-10 Pince coupante Expired - Lifetime EP0331927B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89102303T ATE75177T1 (de) 1988-03-05 1989-02-10 Mittenschneider.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8803016U 1988-03-05
DE8803016U DE8803016U1 (de) 1988-03-05 1988-03-05 Mittenschneider

Publications (2)

Publication Number Publication Date
EP0331927A1 true EP0331927A1 (fr) 1989-09-13
EP0331927B1 EP0331927B1 (fr) 1992-04-22

Family

ID=6821521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89102303A Expired - Lifetime EP0331927B1 (fr) 1988-03-05 1989-02-10 Pince coupante

Country Status (6)

Country Link
US (1) US5014432A (fr)
EP (1) EP0331927B1 (fr)
JP (1) JP2647952B2 (fr)
AT (1) ATE75177T1 (fr)
DE (2) DE8803016U1 (fr)
ES (1) ES2031645T3 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997030822A1 (fr) * 1996-02-22 1997-08-28 Putsch, Ralf Pince coupante devant
EP1031400A3 (fr) * 1999-02-25 2000-11-22 Kapman AB Coupe-boulon
WO2009087174A1 (fr) * 2008-01-09 2009-07-16 Knipex-Werk C. Gustav Putsch Kg Pince telle que pince coupante centrale ou pince coupante de côté
WO2011064284A1 (fr) 2009-11-30 2011-06-03 Knipex-Werk C. Gustav Putsch Kg Pince
DE102009059198A1 (de) 2009-12-17 2011-06-22 KNIPEX-Werk C. Gustav Putsch KG, 42349 Zange
DE102010037286A1 (de) 2010-09-02 2012-03-08 Knipex-Werk C. Gustav Putsch Kg Schneidzange
DE102012101761A1 (de) 2012-03-02 2013-09-05 Knipex-Werk C. Gustav Putsch Kg Werkzeug
DE102014112150A1 (de) * 2014-08-26 2016-03-03 Mytools Enterprise Co., Ltd. Kraftsparende Schneidezange mit abgeschrägten Schneidekanten

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644208A1 (de) * 1996-10-24 1998-04-30 Ver Beckersche Werkzeugfab Schneidwerkzeug
FR2809036B1 (fr) * 2000-05-18 2002-08-23 Sam Outil Plaque de maintien des lames d'un coupe boulon
EP1277551B1 (fr) * 2001-07-20 2004-04-14 Sam Outillage Plaque de maintien des lames d'un coupe boulon
USD472119S1 (en) 2002-04-08 2003-03-25 Ken Barton Burrows Granite and marble nipping tool
US7913400B2 (en) 2007-01-09 2011-03-29 John Arthur Larkin Compact bolt cutter with improved mechanical advantage
US10343295B2 (en) 2015-12-10 2019-07-09 Milwaukee Electric Tool Corporation Bolt cutter
US11745326B2 (en) 2018-03-30 2023-09-05 Milwaukee Electric Tool Corporation Bolt cutter
WO2019191634A1 (fr) 2018-03-30 2019-10-03 Milwaukee Electric Tool Corporation Coupe-boulons
US20240051161A1 (en) * 2022-04-08 2024-02-15 Black & Decker Inc. Multi-link cutting plier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE127895C (fr) *
FR1510908A (fr) * 1966-11-14 1968-01-26 Coupe-boulons à inertie
EP0227032A2 (fr) * 1985-12-21 1987-07-01 SWG Schraubenwerk Gaisbach GmbH & Co. KG Pince suivant le système Rabitz

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2168812A (en) * 1936-12-14 1939-08-08 Henry P Van Keuren Hand tool
US2806394A (en) * 1956-04-19 1957-09-17 Briegel Method Tool Company Plier-type indenter tool
FR2261101B1 (fr) * 1974-02-18 1976-12-03 Stephanoises Forges
DE3127717C2 (de) * 1981-07-14 1983-11-17 Werkzeugfabrik Albert Krenn, 8902 Neusäß Bolzenschneider
JPS61241222A (ja) * 1985-04-18 1986-10-27 Matsushita Electric Works Ltd 絶縁トロリ−の端部カバ−の除去法および除去具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE127895C (fr) *
FR1510908A (fr) * 1966-11-14 1968-01-26 Coupe-boulons à inertie
EP0227032A2 (fr) * 1985-12-21 1987-07-01 SWG Schraubenwerk Gaisbach GmbH & Co. KG Pince suivant le système Rabitz

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997030822A1 (fr) * 1996-02-22 1997-08-28 Putsch, Ralf Pince coupante devant
EP1031400A3 (fr) * 1999-02-25 2000-11-22 Kapman AB Coupe-boulon
US8479399B2 (en) 2008-01-09 2013-07-09 Knipex-Werk C. Gustav Putsch Kg Pliers as middle cutter or side cutter
WO2009087174A1 (fr) * 2008-01-09 2009-07-16 Knipex-Werk C. Gustav Putsch Kg Pince telle que pince coupante centrale ou pince coupante de côté
TWI419771B (zh) * 2008-01-09 2013-12-21 Putsch Gustav C Kg Knipex Werk 鉗子
WO2011064284A1 (fr) 2009-11-30 2011-06-03 Knipex-Werk C. Gustav Putsch Kg Pince
DE102009056081A1 (de) 2009-11-30 2011-06-09 Knipex-Werk C. Gustav Putsch Kg Zange
WO2011082914A1 (fr) 2009-12-17 2011-07-14 Knipex-Werk C. Gustav Putsch Kg Pince
DE102009059198A1 (de) 2009-12-17 2011-06-22 KNIPEX-Werk C. Gustav Putsch KG, 42349 Zange
US9457484B2 (en) 2009-12-17 2016-10-04 Knipex-Werk C. Gustav Putsch Kg Pliers
DE102010037286A1 (de) 2010-09-02 2012-03-08 Knipex-Werk C. Gustav Putsch Kg Schneidzange
WO2012028477A1 (fr) 2010-09-02 2012-03-08 Knipex-Werk C. Gustav Putsch Kg Pince coupante
DE102012101761A1 (de) 2012-03-02 2013-09-05 Knipex-Werk C. Gustav Putsch Kg Werkzeug
DE102014112150A1 (de) * 2014-08-26 2016-03-03 Mytools Enterprise Co., Ltd. Kraftsparende Schneidezange mit abgeschrägten Schneidekanten

Also Published As

Publication number Publication date
ATE75177T1 (de) 1992-05-15
JPH027989A (ja) 1990-01-11
DE8803016U1 (de) 1989-07-06
DE58901211D1 (de) 1992-05-27
JP2647952B2 (ja) 1997-08-27
ES2031645T3 (es) 1992-12-16
US5014432A (en) 1991-05-14
EP0331927B1 (fr) 1992-04-22

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