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EP0140183A1 - Pince - Google Patents

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Publication number
EP0140183A1
EP0140183A1 EP84111691A EP84111691A EP0140183A1 EP 0140183 A1 EP0140183 A1 EP 0140183A1 EP 84111691 A EP84111691 A EP 84111691A EP 84111691 A EP84111691 A EP 84111691A EP 0140183 A1 EP0140183 A1 EP 0140183A1
Authority
EP
European Patent Office
Prior art keywords
legs
leg
pliers
pliers according
joint
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
EP84111691A
Other languages
German (de)
English (en)
Other versions
EP0140183B1 (fr
Inventor
Walter Erke
Jürgen Koltermann
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.)
Belzer-Dowidat Werkzeug-Union GmbH
BELZER DOWIDAT GmbH
Original Assignee
Belzer-Dowidat Werkzeug-Union GmbH
BELZER DOWIDAT GmbH
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 Belzer-Dowidat Werkzeug-Union GmbH, BELZER DOWIDAT GmbH filed Critical Belzer-Dowidat Werkzeug-Union GmbH
Publication of EP0140183A1 publication Critical patent/EP0140183A1/fr
Application granted granted Critical
Publication of EP0140183B1 publication Critical patent/EP0140183B1/fr
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
    • 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

Definitions

  • the invention relates to a pair of pliers for holding and / or pinching workpieces, with two hinged metal legs that abut one another with working edges, each of which has a working part and a curved handle part coated with plastic.
  • Pliers that serve to hold or cut workpieces such as combination pliers, needle-nose pliers, side cutters and the like, have legs, each of which consist of a working part and a handle part.
  • the legs are generally made of forged steel and they are provided with a plastic coating in the area of the handle parts, which enables better handling and also has an electrically insulating effect.
  • the shape of such pliers is essentially determined by the metal parts, the plastic coating forming only an outer jacket. Because the shape of the handle parts it in generally requires that the metal be deformed by forging, the known pliers are made of forgeable steel, which can be additionally hardened in the area of the working parts.
  • the requirement to use forgeable steel for the two pliers legs is a sensitive limitation because non-forgeable metals often have higher strength and would result in better cutting edge quality.
  • Scissors are also known in which the cutting edges are made of metal, but the handle parts are made of plastic.
  • the invention has for its object to provide pliers of the type mentioned, which is light in weight and can be made from non-forgeable material.
  • the invention provides that the legs each consist of a non-forge sheet of substantially constant thickness.
  • the pliers according to the invention are particularly easy to manufacture.
  • the legs can be punched out of sheet metal. Only bevels are required to produce the cutting edges. In all other areas, the sheets are of constant thickness, and bends may be required. High-speed steels, hard metals or other non-forgeable materials can be used as the material for the work parts. In this way, you achieve greater hardness and better cutting edge quality than with forgeable work fabrics.
  • Another advantage of the invention is that the pliers can be made lightweight. To a certain extent, the metal sheets in the handle parts only form a core or a reinforcement, while the outer shape of the handle parts is determined by the plastic coating. In the plane of the sheet metal parts in which the main load on the handle parts occurs, the sheet metal parts have a high section modulus. The sheet metal parts can therefore be made relatively narrow and lightweight.
  • the working part runs obliquely to the plane of the handle part and that the undersides of the legs form an obtuse angle in the working part.
  • a spring is arranged in a recess on the handle side between the legs, which spring is overlapped on each side by a plate molded onto the coating area.
  • the spring that pushes the pliers legs apart is thus concealed between the plates.
  • a flat stop is expediently provided on at least one of the legs and limits the closing movement of the working parts.
  • This stop which is molded onto the plastic coating of one of the handle parts, protects the cutting edges against excessive working pressure, so that overstressing of the cutting edges is avoided.
  • the coating areas each have a circular segment-shaped boundary around the hinge axis.
  • the hinge axis connects the metallic legs.
  • the working parts In order to enable the legs to lie against one another over the entire surface, the working parts have exposed circular areas which are delimited by the plastic sheathing.
  • the front ends of the plastic coatings can be designed on the outer sides of the legs in the form of thumb recesses in order to facilitate gripping and actuating the pliers and to ensure a secure grip for the hand.
  • the joint preferably has a screw as the joint axis. This enables the joint to be readjusted in the event of loosening or wear of joint parts.
  • All or part of the working parts can be provided with a hard coating.
  • a hard coating can e.g. consist of titanium carbide or titanium nitrite.
  • Such cutting edges are suitable for cutting soft and hard wires.
  • the pliers shown in the form of a side cutter have two metallic legs 11, 12 which are connected to one another by a joint 13.
  • Each leg 11, 12 consists of a front working part 14 and a rear handle part 15.
  • the metallic legs 11, 12, which are shown in FIG. 4 without plastic coating of the handle parts, consist of Strips of constant thickness. The strengths of the sheet metal parts are reduced by beveling only in the area of the abutting cutting edges 16, 17.
  • the legs 11, 12 are provided with a plastic coating 18 which determines the outer contour of the pliers legs in the handle part 15.
  • the handle parts 15 have an arcuate shape in the plane of the legs 11, 12, the arc openings facing one another.
  • the plastic coating 18 extends into the vicinity of the joint 13, where it ends at a boundary 19 in the form of a segment of a circle.
  • the front areas 24 of the handle parts 15, that is to say those areas which lie between the joint 13 and the arcuate areas, run parallel to one another.
  • a stop 23 protruding in the direction of the other leg is made of plastic, against which the other leg abuts in the closed state.
  • the stop 23 has the task of limiting the closing force and protecting the cutting edges 16, 17 and the plastic parts from being pressed against one another too strongly.
  • the plastic coating 18 forms thumb troughs 20 at the level of the areas 24.
  • the handle parts 15 have recesses on the mutually facing surfaces, into which a spring 21 is inserted, which strives to push the pliers legs 11, 12 apart.
  • the recess containing the spring 21 is covered on both sides by plates 22, of which one plate is molded onto the plastic cover 18 of one leg 11 and the other plate is molded onto the plastic cover 18 of the other leg 12.
  • the plates 22 have one such an extension in the transverse direction that they cover the spring 21 in each open position of the pliers.
  • the metallic pliers legs 11, 12 have bends 25 in the initial region of the handle parts, so that the metallic legs lie in a common plane in the region of the handle parts.
  • Corresponding offsets 26 are also provided in the initial region of the working parts 14 to ensure that the cutting edges 16, 17 meet. 2 shows, the offset 26 of the leg 12, which projects in the direction of the plate 27 forming the joint part of the other leg 11, has an arcuate course. However, the curve of the bend 26 does not run in a circle around the center of the joint 13, but the distance of the bend 26 from the central axis of the joint 13 increases to the outer edge of the leg 12, so that the part of the leg 11 extending from the plate 27 increases the opening movement of the pliers can be pivoted.
  • the plastic coating 18 is injection-molded onto each of the legs in an injection mold. This gives the handle parts 15 their final outer contour.
  • the cutting edges 16 and 17 do not abut against one another with the tips of their cutting edges, as shown in FIG on the other hand (in the representation according to FIG. 4) above the leg 12. This means that the legs 11, 12 intersect at the rear end of the cutting edges 16, 17.
  • the cutting edge 16 the leg 11 of which lies above the leg 12 in the region of the joint 13, is pushed under the cutting edge 17. In this way, the legs in the joint 13 are pressed against one another and not pushed apart.
  • Fig. 3 it follows that the cutting edges 16 and 17 are inclined with respect to the legs 11, 12, so that the working parts 14 extend obliquely to the level of the handle parts 15.
  • the working parts are also inclined relative to each other.
  • 5 shows, the undersides of the cutting edges 16 and 17 form an angle a of less than 180 °.
  • the bevels of the cutting edges are on the tops. The angle ⁇ between these bevels is approximately 90 °.
  • holes 28 are provided, which are both through the plastic coating 18 and through the metal sheets Extend leg.
  • the holes 28 serve as hanging holes for threading a thread or wire through which the pliers can be hung. Since the holes 28 also pass through the sheet metal parts, there is no risk of the holes being torn out, even under heavy mechanical stress.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Scissors And Nippers (AREA)
  • Knives (AREA)
EP84111691A 1983-10-22 1984-09-29 Pince Expired EP0140183B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8330495U 1983-10-22
DE19838330495U DE8330495U1 (de) 1983-10-22 1983-10-22 Zange

Publications (2)

Publication Number Publication Date
EP0140183A1 true EP0140183A1 (fr) 1985-05-08
EP0140183B1 EP0140183B1 (fr) 1988-04-27

Family

ID=6758219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111691A Expired EP0140183B1 (fr) 1983-10-22 1984-09-29 Pince

Country Status (2)

Country Link
EP (1) EP0140183B1 (fr)
DE (2) DE8330495U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19505080C2 (de) * 1995-02-15 1998-02-19 Guenter Nusbaumer Spaltzange zum Trennen von Glassmalten

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3082652A (en) * 1959-07-30 1963-03-26 Marti Rene Pliers and like tools
US3521510A (en) * 1968-05-22 1970-07-21 Crescent Niagara Corp Spring opened pliers
DE2303375A1 (de) * 1972-01-24 1973-08-09 Brown Frank R Schneideinrichtung
DE2653840A1 (de) * 1975-12-19 1977-06-30 Bahco Verktyg Ab Zange
US4316315A (en) * 1980-01-29 1982-02-23 Josko Vogelnik Pliers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3082652A (en) * 1959-07-30 1963-03-26 Marti Rene Pliers and like tools
US3521510A (en) * 1968-05-22 1970-07-21 Crescent Niagara Corp Spring opened pliers
DE2303375A1 (de) * 1972-01-24 1973-08-09 Brown Frank R Schneideinrichtung
DE2653840A1 (de) * 1975-12-19 1977-06-30 Bahco Verktyg Ab Zange
US4316315A (en) * 1980-01-29 1982-02-23 Josko Vogelnik Pliers

Also Published As

Publication number Publication date
DE3470677D1 (en) 1988-06-01
EP0140183B1 (fr) 1988-04-27
DE8330495U1 (de) 1984-01-19

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