EP0005669B1 - Dispositif de coupe en particulier coupe-boulon - Google Patents

Dispositif de coupe en particulier coupe-boulon Download PDF

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Publication number
EP0005669B1
EP0005669B1 EP79400304A EP79400304A EP0005669B1 EP 0005669 B1 EP0005669 B1 EP 0005669B1 EP 79400304 A EP79400304 A EP 79400304A EP 79400304 A EP79400304 A EP 79400304A EP 0005669 B1 EP0005669 B1 EP 0005669B1
Authority
EP
European Patent Office
Prior art keywords
articulation
cutting device
blade
articulation means
blades
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
Application number
EP79400304A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0005669A1 (fr
Inventor
Alfred Muller
Jean-Paul Muller
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.)
J Muller - Fabrique D'outils SA
Original Assignee
J Muller - Fabrique D'outils SA
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 J Muller - Fabrique D'outils SA filed Critical J Muller - Fabrique D'outils SA
Priority to AT79400304T priority Critical patent/ATE213T1/de
Publication of EP0005669A1 publication Critical patent/EP0005669A1/fr
Application granted granted Critical
Publication of EP0005669B1 publication Critical patent/EP0005669B1/fr
Expired 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
    • 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 cutting device, in particular a bolt cutter consisting of two. cutting blades articulated around two fixed axes held by two flanges and actuated respectively by lever arms pivoting around two other fixed axes maintained by the same flanges.
  • this pusher is connected by means of an axis, sliding in grooves made in the internal faces of the flanges, at the center of rotation of two lever arms connected by articulation axes and by the intermediate of two rods to the flanges of the clamp.
  • this pliers is only used to crimp a metal part and, in general, a thin sheet metal part on an electric cable and, therefore, the effort to be provided is relatively low whereas to cut a bolt and / or a round rod, the effort required is very important.
  • the free ends of the lever arms are brought closer and a push is exerted on the central pusher. Under the action of this vertical thrust, a lateral deployment of the two links is obtained, which causes a lateral thrust exerted on the ends of the jaws causing their rotation and therefore the bringing together of the two elements provided for crimping.
  • a bolt cutter comprising two blades articulated on a common support, two arms also articulated on the same support and means of transmission of forces and movements between the blades and the arms.
  • the blades and the arms are articulated on axes of fixed position in the common support constituted by at least one cheek, while the anterior ends of the arm are arranged between the posterior ends of the blades and that the means of transmission of the forces between each arm and blade consist of a connecting rod whose ends are articulated, one at the rear end of the blade and the other at the front end of the corresponding arm.
  • Each link has at its two ends a cylindrical projection capable of being embedded in a semi-cylindrical housing formed respectively in the rear part of each blade and in the front part of each arm.
  • Each arm comprises, at its anterior end and facing its counterpart, on the one hand, a stop face disposed behind its axis of articulation on the cheeks and intended to cooperate with the corresponding face of the arm opposite. to limit the closing angle of the two br,:.; at a value compatible with human morphology and, on the other hand, an abutment face disposed before the aforementioned articulation axis and intended to limit the maximum opening angle so that the maximum value of the distance separating two . handles attached to the posterior ends of the arms is not greater than human possibilities.
  • the effort is a pushing effort.
  • the semi-cylindrical housing of the front part of each arm exerts a traction on the cylindrical projection of the rod.
  • the latter by its second projection, exerts traction on the semi-cylindrical housing of the rear part of each blade.
  • the present invention aims to provide a remedy to this difficulty.
  • the invention as characterized by the claims, solves the problem of creating a cutting device, in particular a bolt cutter whose effort is a tensile force exerted on the posterior ends of the cutting blades by the intermediary of articulation elements connected, on the one hand, to the cutting blades and, on the other hand, to the lever arms by articulation axes making it possible to obtain a great reduction. Therefore, it is possible, with the same effort, to cut bolts or round rods with a diameter greater than that of bolts or round rods cut with known devices.
  • the robustness of the cutting tool is considerably increased since a spacer can be inserted between the cutting blades and the flanges, which allows, under the pressure and / or traction effect exerted on the axes d 'articulation of the cutting blades, to avoid ovalization of the holes made, on the one hand, in the cutting blades and, on the other hand, in the two flanges.
  • Figure 1 is an elevational view of the active mechanism of the bolt cutter according to the invention
  • Figure 2 is a plan view of a bolt cutter, the upper flange being partially removed
  • Figure 3 is a partial plan view of the bolt cutter according to the invention according to another embodiment
  • Figure 4 is a partial sectional view along section line IV-IV of Figure 3
  • FIG. 5 is a partial sectional view along the section line V-V of FIG. 3.
  • the bolt cutter 1 comprises two parallel flanges 2, 3 interconnected by spacers 4, 5 having a frustoconical head 6, 7 embedded in a frustoconical hole 8, 9 formed in the external face 10 of the upper flange 2 and a threaded bore 11, 12.
  • this threaded bore 11, 12 is screwed a screw 13, 14 whose head.
  • frustoconical 15, 16, embedded in a frustoconical hole 17, 18 produced in the lower flange 3 has a hexagon socket 19, 20.
  • the parallel flanges 2, 3 are crossed by a first pair of fixed vertical axes 21, 22 serving as articulation axes for the cutting blades 23, 24.
  • the parallel flanges 2, 3 are crossed by a second pair of fixed vertical axes 25, 26 serving as articulation axes at the front ends 27, 28 of two lever arms 29, 30.
  • the rear end 31, 32 of the cutting blades 23, 24 and the front end 27, 28 of the two lever arms 29, 30 are connected by articulation elements 33, 34 whose horizontal plane is different from the horizontal plane of the cutting blades 23, 24 and / or of the two lever arms 29, 30.
  • upper articulation elements 33, 34 and lower articulation elements 35, 36 are provided. These articulation elements 33 to 36 are connected to the rear ends 31, 32 of the cutting blades 23 , 24 by articulation rods 37, 38 and at the anterior ends 27, 28 of the two lever arms 29, 30 by articulation rods 39, 40. Therefore, one obtains between the top 41 and the bottom 42 cutting blades 23, 24 and the internal faces 43, 44 of the flanges 2, 3 a free space 45, 46 whose height corresponds to the thickness of the articulation elements. There are inserted in this free space 45, 46 two horizontal spacers 47, 48 connecting together articulation rods 21, 22. The thickness of these spacers 47, 48 corresponds to the thickness of the articulation elements.
  • the flanges 2, 3 bear simultaneously on the spacers and on the articulation elements and the surfaces of these flanges are parallel to each other.
  • These spacers 47, 48 give the whole a certain robustness and annihilate any ovalization of. holes 49, 50 under the effects of thrust and / or traction exerted on the articulation axes 21, 22.
  • These spacers 47, 48 make it possible to reduce the thickness of the flanges 2, 3 while maintaining a minimum resistance of 2000 bars in compression as in tension.
  • the internal edges 51, 52 of the front ends 27, 28 of the two lever arms 29, 30 form a stop.
  • the two lever arms 29, 30 are brought together. These lever arms 29, 30 pivot about their fixed axes 25, 26. Therefore, the articulation rods 39, 40 describe an arc around the center of the fixed axes 25, 26 and having as radius the distance between the center of the fixed axes 25, 26 and the center of the articulation rods 39, 40.
  • a traction is exerted on the articulation elements 33 to 36. The latter transmit this traction, via the articulation rods 37, 38 on the posterior ends 31, 32 of the cutting blades 23, 24. Therefore, the blades of cutting 23, 24 pivot around the fixed vertical axes 21, 22 and the cutting edges of these cutting blades 23, 24 approach until complete shearing of the bolt or round iron.
  • FIGS. 3, 4 and 5 showing another embodiment of the cutting tool.
  • a slot 56 into which the end 57 of the articulation element 33, 34 connected to this rear end 31 is inserted.
  • 32 of the cutting blades 23, 24 by the articulation rod 37.
  • a slot 58 is made in which the other end 59 is inserted of the articulation element 33, 34.
  • the articulation rod 39 connects the articulation element 33m 34 to the anterior end 27, 28 of the two lever arms 29, 30.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Scissors And Nippers (AREA)
  • Shearing Machines (AREA)
  • Harvester Elements (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Details Of Cutting Devices (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Knives (AREA)
EP79400304A 1978-05-17 1979-05-15 Dispositif de coupe en particulier coupe-boulon Expired EP0005669B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79400304T ATE213T1 (de) 1978-05-17 1979-05-15 Schneidegeraet, insbesondere bolzenschneider.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7815170 1978-05-17
FR7815170A FR2425912A1 (fr) 1978-05-17 1978-05-17 Dispositif de coupe, en particulier coupe-boulon

Publications (2)

Publication Number Publication Date
EP0005669A1 EP0005669A1 (fr) 1979-11-28
EP0005669B1 true EP0005669B1 (fr) 1981-09-16

Family

ID=9208547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400304A Expired EP0005669B1 (fr) 1978-05-17 1979-05-15 Dispositif de coupe en particulier coupe-boulon

Country Status (8)

Country Link
US (1) US4268961A (da)
EP (1) EP0005669B1 (da)
JP (1) JPS5510986A (da)
AT (1) ATE213T1 (da)
CA (1) CA1097051A (da)
DE (1) DE2960814D1 (da)
ES (1) ES480654A1 (da)
FR (1) FR2425912A1 (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3140530A1 (de) * 1981-10-13 1983-04-28 Gustav Klauke GmbH & Co, 5630 Remscheid "kabelschere, insbesondere handhebel-kabelschere"
DE3807251A1 (de) * 1988-03-05 1989-09-14 Sennheiser Electronic Kapazitiver schallwandler
JP4801425B2 (ja) * 2005-11-25 2011-10-26 前田金属工業株式会社 手動切断具
US20120198704A1 (en) * 2011-02-03 2012-08-09 Cosier Norman L Apparatus for Trimming Toilet Anchor Bolts

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US188133A (en) * 1877-03-06 Improvement in bolt and rivet cutters
US102006A (en) * 1870-04-19 Improved bolt-cutter
US374480A (en) * 1887-12-06 Rod-cutter
FR404782A (fr) * 1909-07-06 1909-12-11 George Henry Powell Outil à machoires articulées
US1455297A (en) * 1921-11-21 1923-05-15 Heller Tool Company Cutting tool
US2229263A (en) * 1937-06-26 1941-01-21 Henry P Van Keuren Hand tool
US2992576A (en) * 1957-11-19 1961-07-18 Amp Inc Hand crimping tool
US3269230A (en) * 1965-05-10 1966-08-30 Vlier Engineering Corp Hand toggle pliers
FR2261101B1 (da) * 1974-02-18 1976-12-03 Stephanoises Forges

Also Published As

Publication number Publication date
EP0005669A1 (fr) 1979-11-28
DE2960814D1 (en) 1981-12-03
FR2425912B1 (da) 1982-03-26
US4268961A (en) 1981-05-26
CA1097051A (fr) 1981-03-10
JPS5510986A (en) 1980-01-25
ATE213T1 (de) 1981-10-15
ES480654A1 (es) 1979-11-16
FR2425912A1 (fr) 1979-12-14

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