EP0140183B1 - Pince - Google Patents

Pince Download PDF

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Publication number
EP0140183B1
EP0140183B1 EP84111691A EP84111691A EP0140183B1 EP 0140183 B1 EP0140183 B1 EP 0140183B1 EP 84111691 A EP84111691 A EP 84111691A EP 84111691 A EP84111691 A EP 84111691A EP 0140183 B1 EP0140183 B1 EP 0140183B1
Authority
EP
European Patent Office
Prior art keywords
pliers
legs
leg
plastic
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.)
Expired
Application number
EP84111691A
Other languages
German (de)
English (en)
Other versions
EP0140183A1 (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
Original Assignee
Belzer-Dowidat Werkzeug-Union 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 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 pliers for holding and / or pinching workpieces, with two working edges abutting, articulated metallic legs, each having a working part and a plastic coated curved handle part and made of sheet metal of substantially constant thickness, and with one Handle parts of the leg pushing apart spring.
  • a known pliers the legs of which are made of sheet metal material and the handle parts are coated with plastic, is known from US-A-3 521 510. With these pliers, the handle parts of the legs are pressed apart by a spring, so that the working parts are normally held in the open position.
  • the plastic coating consists of sleeves that are pushed onto the sheet metal parts of the legs, and the spring engages directly on the unprotected sheet metal parts and is exposed unprotected. The spring can therefore come into conflict with other objects or cause injuries when the pliers are actuated.
  • US-A-3 082 652 describes a similar pair of pliers, the legs of which consist of plastic-coated sheet metal parts, but no spring is provided here at all, which brings the pliers legs into the open position.
  • the invention has for its object to provide a pair of pliers of the type mentioned, in which the spring is housed protected with a simple shape of the plastic covers of the legs.
  • the invention provides that the spring is inserted in recesses in the handle parts and covered on both sides by plates, that one plate is molded from the plastic of one leg and the other plate is molded from the plastic of the other leg, and that the plates are one have such an extension in the transverse direction that they cover the spring in each open position of the pliers.
  • 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. B. consist of titanium carbide or titanium nitride.
  • Such cutting edges are suitable for cutting soft and hard wires.
  • 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
  • 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. B. consist of titanium carbide or titanium nitride.
  • 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 sheet metal 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, i.e. those areas which lie between the joint 13 and the arcuate areas run parallel to one another.
  • a plastic stop 23 protruding in the direction of the other leg is formed, 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, one plate of which is molded onto the plastic covering 18 of one leg 11 and the other plate is molded onto the plastic covering 18 of the other leg 12.
  • the plates 22 have 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 abut, as shown in FIG. 5 shows, not with the tips of their cutting edges against each other, but the tip of the cutting edge 16 of the leg 11 lies somewhat lower than the tip of the cutting edge 17 of the leg 12. In contrast, the leg 11 lies above (in the illustration according to FIG. 4) the leg 12. This means that the legs 11, 12 intersect at the rear end of the cutting edges 16, 17. If the pliers are closed with great force, 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 in the vicinity of the handle-side ends of the legs 11 and 12 and extend through both the plastic coating 18 and the sheet metal of the legs.
  • 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)
  • Scissors And Nippers (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Knives (AREA)

Claims (9)

1. Pince permettant de maintenir et/ou tronçonner des pièces, comprenant, d'une part, deux branches métalliques (11, 12) qui sont reliées de façon articulée et appliquent l'une sur l'autre leurs arêtes actives et qui comprennent chacune une partie active (14) et une poignée (15) cintrée et revêtue de matière plastique et sont constituées de tôle d'une épaisseur sensiblement constante et, d'autre part, un ressort (21) repoussant à l'écart l'une de l'autre ces poignées (15) des branches (11,12), caractérisée en ce que le ressort (21) est placé dans des cavités des poignées et est recouvert sur les deux côtés par des plaquettes (22), en ce que l'une (22) de ces plaquettes est réalisée par formage avec la matière plastique de la première branche (11) et l'autre plaquette (22) est réalisée par formage avec la matière plastique de l'autre branche (12) et en ce que ces plaquettes (22) ont, suivant la direction transversale, une étendue telle qu'elles recouvrent le ressort (21) dans toute position d'ouverture de la pince.
2. Pince suivant la revendication 1, caractérisée en ce que les parties actives (14) s'étendent d'une manière inclinée par rapport au plan des poignées (15) et en ce que les faces inférieures des branches (11,12) de ces parties actives (14) font entre elles un angle obtus (a).
3. Pince suivant la revendication 1 ou 2, caractérisée en ce que la branche (11) qui, au niveau de l'articulation (13), se trouve audessus de l'autre branche (12), attaque par son arête active légèrement au-dessous de celle de cette autre branche (12).
4. Pince suivant l'une des revendications 1 à 3, caractérisée en ce qu'il est prévu, sur au moins l'une des branches (11, 12), une butée en forme de surface (23) qui limite le déplacement de fermeture des parties actives (14).
5. Pince suivant l'une des revendications 1 à 4, caractérisée en ce que les parties actives (14) sont pourvues, au moins partiellement, d'un revêtement en matériau dur.
6. Pince suivant l'une des revendications 1 à 5, caractérisée en ce que les revêtements en matière plastique comportent chacun une limite en forme d'arc de cercle (19) autour de l'axe d'articulation (13).
7. Pince suivant la revendication 1 ou 6,
caractérisée en ce que les extrémités avant des revêtements en matière plastique sont agencés, sur les côtés extérieurs des branches (11, 12), sous la forme de creux (20) pour le pouce.
8. Pince suivant l'une des revendications 1 à 7, caractérisée en ce que l'articulation (13) comporte, en tant qu'axe d'articulation, une vis.
9. Pince suivant l'une des revendications 1 a 8, caractérisée en ce que, au voisinage de l'extrémité, côté poignée, d'au moins une branche (11, 12), il est prévu un trou (28) qui s'étend tant à travers le revêtement de matière plastique (18) qu'à travers la tôle de cette branche.
EP84111691A 1983-10-22 1984-09-29 Pince Expired EP0140183B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Family Cites Families (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
US3774301A (en) * 1972-01-24 1973-11-27 F Brown Cutters
SE398995B (sv) * 1975-12-19 1978-01-30 Bahco Verktyg Ab Tang
US4316315A (en) * 1980-01-29 1982-02-23 Josko Vogelnik Pliers

Also Published As

Publication number Publication date
EP0140183A1 (fr) 1985-05-08
DE8330495U1 (de) 1984-01-19
DE3470677D1 (en) 1988-06-01

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