EP0011545B1 - Auswechselbares Messer für Bolzenschneider - Google Patents

Auswechselbares Messer für Bolzenschneider Download PDF

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Publication number
EP0011545B1
EP0011545B1 EP79400826A EP79400826A EP0011545B1 EP 0011545 B1 EP0011545 B1 EP 0011545B1 EP 79400826 A EP79400826 A EP 79400826A EP 79400826 A EP79400826 A EP 79400826A EP 0011545 B1 EP0011545 B1 EP 0011545B1
Authority
EP
European Patent Office
Prior art keywords
cutting
interchangeable
interchangeable knife
jaw
knife
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
EP79400826A
Other languages
English (en)
French (fr)
Other versions
EP0011545A1 (de
Inventor
Alfred 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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT79400826T priority Critical patent/ATE998T1/de
Publication of EP0011545A1 publication Critical patent/EP0011545A1/de
Application granted granted Critical
Publication of EP0011545B1 publication Critical patent/EP0011545B1/de
Expired legal-status Critical Current

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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
    • B25B7/02—Jaws
    • B25B7/04—Jaws adjustable
    • 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 an interchangeable knife for a bolt cutter consisting essentially of two cutting jaws articulated around two axes held by two flanges and actuated by lever arms pivoting around two other axes maintained by the same flanges.
  • the bolt cutter comprises two branches articulated to each other by means of a bolt fulfilling the pivot function and two jaws connected to each other by two lateral flanges by means of bolts.
  • the jaws include knives, the cutting edges of which serve to cut metal wires, screws, threaded rods, concrete iron, cables and the like.
  • the bolt cutter is subjected to high value forces and the cutting edges become dull quickly and means must be provided to restore the other's primary efficiency.
  • a device for adjusting the clearance between the cutting edges of the jaws of a bolt cutter shears, comprising two offset cams on each of which is mounted a jaw and which are themselves mounted on a bolt assembling the corresponding jaw with lateral flanges threaded on the bolt rod.
  • the bolt rods are cylindrical, while the off-center cams are locked in rotation on the bolt rods by means of a key or grooves, the axial thickness of the off-center cams being somewhat greater than that of the jaws at the location tapped holes, while the lateral flanges are tightened on the lateral faces of the offset cams to block them in rotation.
  • the longevity of the bolt cutter is increased, but after a certain period of use, the blunt knives must be replaced. Frequently, it is not possible to replace defective parts and you have to purchase a new bolt cutter, which incurs additional costs.
  • a second known means there is provided in the edges facing the jaws a cavity in which a knife is engaged.
  • This knife has an equilateral section and we can reverse the different edges as and when they wear.
  • side flanges are provided projecting from the two edges of the base. The protrusions of these lateral flanges partially cover the two sides adjacent to the cutting angle.
  • this second means has several drawbacks, among others it frequently happens that the knives are torn from their housing. This tearing occurs when the cut is made at an angle and not perpendicularly. Because the knife has an equilateral section, the cutting angle is necessarily 60 degrees. However, the larger the angle, the less the cutting edge penetrates the material to be cut and the greater the human effort must be.
  • a bolt cutter consisting of two cutting jaws actuated by lever arms comprising interchangeable knives covering the internal edge of the cutting jaw.
  • These interchangeable knives have practiqaement a rectangular section and the face opposite to that applied on the internal edge of the cutting jaw has a cutting edge.
  • Said knives are held laterally in place by bars integral with the lateral faces of said knives and projecting from the face applied to the internal edge of the cutting jaw. These bars have on the internal face, near one of their ends, a boss which engages in a semi-spherical recess.
  • a pliers comprising a tool having a body of section of a U covering the internal edge of a jaw, fixed to the jaw by a bolt parallel to the axis of articulation of the jaw.
  • the tool in question is only used to hold the parts gripped by the pliers and, therefore, has no means ensuring the cutting of a bolt.
  • the tool is held by a rivet and it is not intended that this tool is interchangeable.
  • the present invention as characterized in the claims aims to provide the interchangeable knives with a structure such that these knives can absorb significant lateral forces created when a cut is not perpendicular to the workpiece while allowing significantly better cutting results.
  • Figure 1 is an elevational view of the upper part of a cutting jaw of a bolt cutter according to the invention
  • Figure 2 is a plan view of Figure 1.
  • Each bolt cutter comprises two cutting jaws 1 each pivoting about a hinge axis 2.
  • the upper end 3 of the jaw of section 1 has an internal edge 4 parallel to the median axis 5 of the bolt cutter.
  • This internal edge 4 is capped with an interchangeable knife 6.
  • This interchangeable knife 6 has a U-shaped section body.
  • the two parallel wings 7 and 8 are applied against the two faces 9 and 10 of the cutting jaw 1 then that the internal face 11 of the transverse wing 12 abuts against said internal edge 4.
  • the external face 13 of the transverse wing 12 has a cutting edge 14 directed towards the median axis 5.
  • transverse axes 15 are provided parallel to the articulation axes 2 annihilating any sliding of the two parallel wings 7, 8 of the interchangeable knife 6 relative to the faces 9, 10 of the cutting jaw 1.
  • the lateral forces obtained when a cut is not perpendicular to the workpiece, do not tear off the knife 6.
  • these transverse axes 15 are advantageously high-strength bolts .
  • the cutting edge 14 has an angle such that it facilitates the penetration of the knife into the workpiece without said edge being blunt. This angle is 50 degrees.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Knives (AREA)
  • Scissors And Nippers (AREA)
  • Milling Processes (AREA)
  • Shearing Machines (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
  • Threshing Machine Elements (AREA)

Claims (5)

1. Auswechselbare Schneide für Bolzenschneider aus zwei Schneidbacken (1), die um zwei Achsen (2) drehen, welche von zwei Flanschen gehalten werden, wobei sie von Hebelarmen betätigt werden, die um zwei, von den gleichen Flanschen gehaltenen Achsen drehen, gekennzeichnet dadurch, dass die auswechselbare Schneide (6) einen U-förmigen Körper aufzeigt, der in seiner vollen Länge an der Innenschmalseite (4) der Schneidbacke (1) aufsitzt, wobei die Schneidkante (14) und der Körper ein geschlossenes Ganzes bilden.
2. Auswechselbare Schneide gemäss Anspruch 1, dadurch gekennzeichnet, dass die beiden parallelen und vertikalen Flügel (7, 8) des Körpers mit den Aussenflächen (9, 10) der Schneidbacke (1) zusammenwirken.
3. Auswechselbare Schneide gemäss Anspruch 1, dadurch gekennzeichnet, dass die mit der Aussenfläche (13) des Querflügels (12) des U-förmigen Körpers fest zusammenhängende Schneidkante (14) einen Winkel von fünfzig Grad aufzeigt.
4. Auswechselbare Schneide gemäss Anspruch 1, dadurch gekennzeichnet, dass sie Mittel (15) aufzeigt, welche den Wider stand gegen eine seitliche Vershiebung der Schneide (6) im Vergleich zu den Aussenflächen (9, 10) der Schneidbacke (1) erhöhen.
5. Auswechselbare Schneide gemäss Anspruch 4, dadurch gekennzeichnet, dass die Mittel, welche die beiden parallelen Flügel (7, 8) des Körpers gegen die Aussenflächen (9, 10) der Schneidbacke (1) drücken, aus einem hochfesten Bolzen (15) bestehen, der durch die Schneidbacke (1) und die Beiden parallelem Flügel (7, 8) des Körpers der auswechselbaren Schneide (6) dringt.
EP79400826A 1978-11-07 1979-11-06 Auswechselbares Messer für Bolzenschneider Expired EP0011545B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79400826T ATE998T1 (de) 1978-11-07 1979-11-06 Auswechselbares messer fuer bolzenschneider.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7832052A FR2440803A1 (fr) 1978-11-07 1978-11-07 Coupe-boulon
FR7832052 1978-11-07

Publications (2)

Publication Number Publication Date
EP0011545A1 EP0011545A1 (de) 1980-05-28
EP0011545B1 true EP0011545B1 (de) 1982-05-12

Family

ID=9214823

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400826A Expired EP0011545B1 (de) 1978-11-07 1979-11-06 Auswechselbares Messer für Bolzenschneider

Country Status (4)

Country Link
EP (1) EP0011545B1 (de)
AT (1) ATE998T1 (de)
DE (1) DE2962838D1 (de)
FR (1) FR2440803A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7191525B2 (en) 2003-10-08 2007-03-20 Brailovskiy Aleksandr M Two-stage attachment for cutting, crimping etc, and mechanical method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1334965A (en) * 1917-03-08 1920-03-30 Ridings John Henry Jawed tool
US2574909A (en) * 1948-06-03 1951-11-13 Harold S Willoughby Adjusting means for the jaws of a pivoted jaw wrench

Also Published As

Publication number Publication date
FR2440803B1 (de) 1982-03-26
ATE998T1 (de) 1982-05-15
EP0011545A1 (de) 1980-05-28
FR2440803A1 (fr) 1980-06-06
DE2962838D1 (en) 1982-07-01

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