EP0331927B1 - Pince coupante - Google Patents

Pince coupante Download PDF

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Publication number
EP0331927B1
EP0331927B1 EP89102303A EP89102303A EP0331927B1 EP 0331927 B1 EP0331927 B1 EP 0331927B1 EP 89102303 A EP89102303 A EP 89102303A EP 89102303 A EP89102303 A EP 89102303A EP 0331927 B1 EP0331927 B1 EP 0331927B1
Authority
EP
European Patent Office
Prior art keywords
roller body
cutting
centre cutting
nipper
cutters
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
EP89102303A
Other languages
German (de)
English (en)
Other versions
EP0331927A1 (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 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.
  • the handle leg heads are connected via a cross strap.
  • the latter acts on the end bearing bolts of the handle leg heads. This solution is felt to be even more complex.
  • DE-C-127 895 is known from the prior art. This document discloses a pair of pliers designed as side cutters or front cutters, in which the pliers legs cross without the need for a pivot pin.
  • 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 given joint-free crossing of the pliers legs results in an extension of the power arm while maintaining the basic length of the tool in the center cutter.
  • the joint means are laid in the head or cutting area.
  • the non-commercial crossover area of the handle legs can act as a guide surface.
  • the procedure is further such that the cylindrical tooth forming the tooth gap intervention
  • the roller body extends transversely to the wedge-shaped cutting edges in cross section and is received proportionately in a corresponding penetration cavity formed from two hollow sections in the cutting edges, such that there is an approximately right-angled transition between the wading edges of the cutting edges ending directly on the roller body and the walls of the hollow sections is.
  • 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 handle legs form a throat at hand width distance from the free end of the handle legs, which is at a corresponding distance from the crossover area of the pliers legs, which arched outward from the handle 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 cross each other in the commercial area, each in a 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 paired plate tabs which 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 thus extending transversely to the cutting edges 8, 9 is proportionately seated 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 (cf. 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 beyond the cutting edge of the tab 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 number 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 has the shape of a half roller body, divided in the axial view.
  • the supportive outer surface takes into account the need for movement to open the mouth, so it is slightly larger than the said half.
  • FIGS. 10 and 11 is also continued as a penetration line in FIGS. 10 and 11, however, because of the better understanding of the one-piece design, the arc line on the fastening jaw side is omitted.
  • the handle legs 1, 2 form abutment spurs 16 which face each other and which 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)
  • Disintegrating Or Milling (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Claims (10)

1. Pince à coupe centrale, comportant des mâchoires de découpage (3, 4) montées à pivotement sur des axes ou boulons de palier (5, 6), dans laquelle l'articulation est formée au moyen de pattes d'attache (7), qui relient les mâchoires de découpage (3, 4) au dos de la zone des mâchoires de découpage, et une butée d'entredent (ZL) assurant la contention mutuelle des deux mâchoires de découpage (3, 4), caractérisée en ce que les branches de pince (1, 2) sont réalisées pour se croiser, sans aucun tourillon d'articulation, et en ce que le tranchants (8, 9) des mâchoires de découpage (3, 4) débouchent sur la surface d'enveloppe de la butée d'entredent (ZL) formée par un corp de roulement (11).
2. Pince à coupe centrale selon la revendication 1, caractérisée en ce que la corps de roulement (11), qui forme la butée d'entredent (ZL), est cylindrique et s'étend transversalement aux tranchants (8, 9) à section transversale en forme de coin, et est logé chaque fois partiellement, dans un évidement traversant (12) correspondant, composé de deux sections dévidements (I, II) formées dans les tranchants, de telle façon qu'on obtienne une transition à peu près à angle droit, entre les bords de coupe (8′, 9′), finissant directement sur le corps de roulement (11) et les parois de sections d'évidement (I, II).
3. Pince à coupe centrale selon la revendication 2, caractérisée en ce que les lignes (L) de plus grande longueur des parois des sections d'évidement (I, II) se déplacent en position de face à face pratiquement diamétral sur le corps de roulement (11), lors de la fermeture de la pince à coupe centrale.
4. Pince à coupe centrale selon l'une des revendications 2 ou 3, caractérisée en ce que le corps de roulement (11) s'encliquète en une position d'hyperextension, du côté des branches de saisie, au-dessus d'un plan transversal (E-E) défini par le boulon de palier (5, 6) des branches de pince.
5. Pince à coupe centrale selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que les sections d'évidement (I, II) sont disposées dans les tranchants (8, 9), de telle façon que le corps de roulement (11) fasse partiellement saillie sur la bordure côté tranchant des pattes d'attache (7) lorsque la pince à coupe centrale est ouverte.
6. Pince à coupe centrale selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que les sections d'évidement (I, II) sont un peu en forme en lentille, du fait de la pénétration.
7. Pince à coupe centrale selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que le corps de roulement (11) est fixé dans l'une des sections d'évidement (I, II).
8. Pince à coupe centrale selon l'une ou plusieurs des revendication précédentes, caractérisée en ce que le corps de roulement (11) de l'un ou l'autre tranchant (8 ou 9) est réalisé sous forme d'une saillie identique, obtenu monobloc par forgeage.
9. Pince à coupe centrale selon l'une ou plusieurs des revendications précédentes, caractérisée en ce qu'à une distance de la largeur d'une main de l'extrémité libre de la branche de prise, les branches de prise (1, 2) forment un creux (18), situé à une distance correspondante par rapport à la zone de croisement (K) des branches de pince, en ce que les sections de prise partant du creux s'étendent recourbées en forme d'arc vers l'extérieur et les sections d'extrémité libres raccordées à un deuxième creux (19) prennent une allure légèrement divergente.
10. Pince à coupe centrale selon l'une ou plusieurs des revendication précédentes, caractérisée en ce que le tranchant (8 ou 9) se prolonge jusqu'à la pleine épaisseur de la mâchoire de découpage (3 ou 4), au raccordement à un gradin (13) d'éffilement des mâchoires.
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 (fr) 1988-03-05 1988-03-05

Publications (2)

Publication Number Publication Date
EP0331927A1 EP0331927A1 (fr) 1989-09-13
EP0331927B1 true 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008003723A1 (de) 2008-01-09 2009-07-16 Knipex-Werk C. Gustav Putsch Kg Zange

Families Citing this family (13)

* 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
DE19644208A1 (de) * 1996-10-24 1998-04-30 Ver Beckersche Werkzeugfab Schneidwerkzeug
SE9900656L (sv) * 1999-02-25 2000-01-24 Kapman Ab Justerbar bultsax
FR2809036B1 (fr) * 2000-05-18 2002-08-23 Sam Outil Plaque de maintien des lames d'un coupe boulon
ES2217102T3 (es) * 2001-07-20 2004-11-01 Sam Outillage Placa de sujecion de las hojas de un corta-pernos.
US7913400B2 (en) 2007-01-09 2011-03-29 John Arthur Larkin Compact bolt cutter with improved mechanical advantage
DE102009056081A1 (de) 2009-11-30 2011-06-09 Knipex-Werk C. Gustav Putsch Kg Zange
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
TWM546298U (zh) 2015-12-10 2017-08-01 米沃奇電子工具公司 螺栓切斷器
US11745326B2 (en) 2018-03-30 2023-09-05 Milwaukee Electric Tool Corporation Bolt cutter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE127895C (fr) *
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
FR1510908A (fr) * 1966-11-14 1968-01-26 Coupe-boulons à inertie
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
DE3545756A1 (de) * 1985-12-21 1987-06-25 Schraubenwerke Gaisbach Gmbh & Rabitzzange

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008003723A1 (de) 2008-01-09 2009-07-16 Knipex-Werk C. Gustav Putsch Kg Zange
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
DE102008003723B4 (de) 2008-01-09 2018-11-22 Knipex-Werk C. Gustav Putsch Kg Zange

Also Published As

Publication number Publication date
JP2647952B2 (ja) 1997-08-27
US5014432A (en) 1991-05-14
EP0331927A1 (fr) 1989-09-13
ATE75177T1 (de) 1992-05-15
ES2031645T3 (es) 1992-12-16
JPH027989A (ja) 1990-01-11
DE8803016U1 (fr) 1989-07-06
DE58901211D1 (de) 1992-05-27

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