EP0794039B1 - Pince avec deux branches en matiere platique, obtenues par moulage - Google Patents

Pince avec deux branches en matiere platique, obtenues par moulage Download PDF

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Publication number
EP0794039B1
EP0794039B1 EP96103123A EP96103123A EP0794039B1 EP 0794039 B1 EP0794039 B1 EP 0794039B1 EP 96103123 A EP96103123 A EP 96103123A EP 96103123 A EP96103123 A EP 96103123A EP 0794039 B1 EP0794039 B1 EP 0794039B1
Authority
EP
European Patent Office
Prior art keywords
pliers
metal
pivot
pliers according
bearing surface
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
EP96103123A
Other languages
German (de)
English (en)
Other versions
EP0794039A1 (fr
Inventor
Hermann J. Zerver
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.)
Hazet Werk Hermann Zerver GmbH and Co KG
Original Assignee
Hazet Werk Hermann Zerver GmbH and Co 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 Hazet Werk Hermann Zerver GmbH and Co KG filed Critical Hazet Werk Hermann Zerver GmbH and Co KG
Priority to DE59603713T priority Critical patent/DE59603713D1/de
Priority to AT96103123T priority patent/ATE186864T1/de
Priority to ES96103123T priority patent/ES2139968T3/es
Priority to EP96103123A priority patent/EP0794039B1/fr
Publication of EP0794039A1 publication Critical patent/EP0794039A1/fr
Application granted granted Critical
Publication of EP0794039B1 publication Critical patent/EP0794039B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/20—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same inserting or withdrawing split pins or circlips
    • B25B27/205—Pliers or tweezer type tools with tow actuated jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B25G1/12—Handle constructions characterised by material or shape electrically insulating material

Definitions

  • the invention relates to pliers with pliers halves made of plastic moldings, which are pivotally connected to one another via a trade and one end shaped as a handle and the other end with a corresponding to the respective application, consisting of metal and protruding functional element are provided from the molded body, wherein both functional elements are arranged in the same plane of movement and each functional element is an integral part of an embedded in the molded body and is made of this mostly enclosed metal insert, each of the two metal inserts going beyond the commercial sector provided with an extension completely embedded in the molded body is, which extends into the beginning of the handles, and at least one of the two metal inserts is provided with a hole in which the axis of rotation of the trade is stored.
  • Such pliers with two pivotable in a common plane of movement Functional elements are used, for example, to open circlips used.
  • a generic pliers is from US-A 3,833,953 known. Both pliers halves each consist of plastic moldings, which is reinforced with metal inserts and in the commercial sector by means of a Screw connection are clamped against each other.
  • the invention has for its object to provide a lightweight and low-wear pliers, which ensures maximum movement precision and a pleasant force transmission to be felt at high operating forces.
  • an axial bearing surface concentrically surrounding the axis of rotation is formed on each of the two metal inserts as an annular elevation which bears against the other axial bearing surface, and that the axis of rotation is rotationally fixed in one of the two metal inserts is held and has at one end a radial extension forming an axial bearing surface, which rests on the back of the adjacent annular elevation.
  • a pliers designed in this way is the targeted reinforcement of the Halves of the pliers in the section demanding the greatest movement precision between functional element and trade particularly torsion resistant and lightweight at the same time.
  • By the metal inserts only in the Extending the beginning of the handles is also limited flexibility of the lower halves of the pliers, which when a large force is applied as a result of a certain flexibility and thus felt pleasant offers comfortable handling.
  • a backlash-free and low-wear Storage ensured by the design of the axial bearing surfaces.
  • the pliers also reduce friction and thus wear in the field of pliers. This also contributes to the fact that the axis of rotation is non-rotatably connected to one of the metal inserts and one additional axial bearing surface, which is on the back of the adjacent annular survey is present.
  • the metal insert with the hole and the other metal insert with a non-round one Opening e.g. a polygonal opening
  • a non-round one Opening e.g. a polygonal opening
  • the axis of rotation Hole and opening protrude at the same time and by means of the opening adapted mating surfaces is rotationally fixed with respect to the opening.
  • the one in the hole Arranged radial bearing surface of the axis of rotation can be between the axial Storage area and the mating surfaces are. In this way, the existence a reinforcing metal insert is also used to Pliers must be stored without play and with little wear.
  • the metal inserts serve the statics of the pliers when force is applied to improve the handles, furthermore the strength of the pliers against one Twisting of the pliers halves increase, and finally the friction as well reduce wear in the pliers industry.
  • the metal sets therefore need not be visible from the outside, which is why with a Training is proposed that the metal inserts so far in the Plastic moldings are embedded that only the functional elements and annular areas around the axis of rotation including the axial bearing surfaces are not covered by plastic.
  • the production of the metal insert as a stamped part is for reasons of production costs sought, in which case the functional element with the Stamped part is welded.
  • the functional element with the Stamped part is welded.
  • it has in terms of the strength of the Welding turned out to be advantageous if the stamped part and functional element connected by a TIG welding process without welding filler are.
  • the metal insert consists of a stamped metal piece, you can the ring-shaped elevations by cold deformation of the area round around the later axis of rotation.
  • the pliers halves be made from polyamide are in which the respective metal insert during the spraying process is positively embedded. To increase strength in the area of Handles a fiber reinforcement of the polyamide used is possible.
  • the pliers shown in Figures 1 and 2 in plan view and side view consists of two pliers halves connected by a trade 1 2, 3, from the ends of which functional elements 4 protrude. Each in one Functional elements running out of pins serve to make the ends more commercially available To seize circlips.
  • Both pliers halves 2, 3 consist predominantly of a molded body made of glass fiber reinforced polyamide.
  • the pincer halves 1, 2 are molded pins 7, between which there is a spring element 8 can be used. Extensions 7a of the pin end in the manner of Barbs prevent the spring element 8 from accidentally coming loose.
  • a metal insert is inserted into the plastic material of each pliers half 2, 3 9, 10 embedded, as can be seen in FIGS. 5 and 6.
  • Metal insert 9, 10 is a flat stamped part, which on its one end is connected to the functional element 4.
  • connection technology between the hardened functional element 4 and the non-heat-treated Metal insert 9, 10 has a TIG welding process without Welding consumables were found to be suitable.
  • Figures 5 and 6 also show that only that for Working with the pliers important end of the functional element 4 from the Shaped body of the respective pliers half 2, 3 protrudes, but otherwise one Part of the functional element 4 and the full metal insert 9, 10 in the Plastic molded body is embedded.
  • the metal insert 9, 10 encloses the opening 11 or bore 12 Axis of rotation of the trade 1, so that there is a rigid metallic connection results from the top of the functional element 4 to the trade 1.
  • each of the two metal inserts 9, 10 is beyond the range of Trade 1 also provided with an extension 13 which extends into the The beginning of each handle 5, 6 extends into it.
  • the length of the extensions 13 is such that this up to the first third of the length L of the Handle area of the handles 5, 6 protrude.
  • the metal insert 9 is in the area of trade 1 with a depression 14 provided, which in turn around the axis of rotation of the trade with a annular elevation 15 is provided.
  • the annular elevation 15 forms on its upper side a flat axial bearing surface 16, the bore 12 and so that the axis of rotation of the trade concentrically surrounds.
  • the axial bearing surface 16 is located exactly in the plane of movement B for the pivoting movement of the functional element 4. The corresponding one lies on the axial bearing surface 16 axial bearing surface 17 of the other pliers half 3, what in is shown individually in FIG. 4.
  • Fig. 3 also reveals that the metal insert 9 including the Functional element 4 so far in the plastic molded body of the pliers half 2 is embedded that only the tip of the functional element 4 and annular areas around the axis of rotation including the axial bearing surface 16 free.
  • the pliers halves 2, 3 are already in the manufacture metal insert provided with the functional element inserted into the injection mold, and then the liquid plastic is pressed into the mold, so that the Encloses metal parts in the form mentioned.
  • the axis of rotation 18 settles from a cylindrical section 19, a section provided with mating surfaces 20 and a radial extension 21 outside the metal inserts 9, 10 together.
  • the section 20 provided with mating surfaces projects through the opening 11 in the metal insert 10, while the cylindrical portion 19 the Hole 12 extends through the metal insert 9.
  • the mating surfaces 20 of section 20 are on the shape of the mating surfaces also Opening 11 tuned so that the axis of rotation 18 with respect to rotation of the metal insert 10.
  • the other metal insert 9 can be free rotate on the cylindrical portion 19 of the axis of rotation 18, and therefore forms the real pivot of the trade.
  • the axis of rotation falls out To prevent 18 is a locking screw 24 from the other side screwed into the threaded axis of rotation 18. Since the Axis of rotation 18 is held in the metal insert 10 in a rotationally fixed manner, no relative movement can occur and therefore no friction on the locking screw 24 occur, which is why self-locking of the axis of rotation 18 and locking screw 24 is present.
  • the radial support of the swivel joint takes place on the one hand by means of the adjacent one axial bearing surfaces 16, 17 of the two metal inserts 9, 10 and on the other hand by means of a further axial bearing surface 22, which is located on the radial Extension 21 of the axis of rotation 18 is located.
  • This axial bearing surface 22nd is supported flat on the back 23 of the annular elevation 15 of the Metal insert 9 from.
  • axis of rotation 18 and locking screw form 24 therefore an abutment for the axial forces and the torsional forces in business 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Scissors And Nippers (AREA)
  • Mechanical Control Devices (AREA)

Claims (9)

  1. Pince comportant deux branches (1, 2) consistant en des corps moulés en matière plastique, qui sont reliés l'un à l'autre de manière pivotante par l'intermédiaire d'une articulation encastrée (1), l'une de leurs extrémités étant moulée en forme de poignée (5, 6) tandis que l'autre de leurs extrémités est pourvue d'un élément fonctionnel (4) consistant en un métal, faisant saillie à partir du corps moulé et correspondant à l'utilisation prévue, les deux éléments fonctionnels (4) étant disposés dans le même plan de mouvement (B) et chaque élément fonctionnel (4) étant un élément constitutif, d'une seule pièce, d'un insert métallique (9, 10) encastré dans le corps moulé et entouré en majeure partie par celui-ci, chacun des deux inserts métalliques (9, 10) étant pourvu, au-delà de la zone de l'articulation (1), d'un prolongement (13) complètement noyé dans le corps moulé et s'étendant jusqu'au début des poignées (5, 6), au moins l'un des deux inserts métalliques (9, 10) étant pourvu d'un alésage (12) dans lequel est monté l'axe d'articulation (18) de l'articulation encastrée (1),
    caractérisée en ce que
    au niveau de chacun des deux inserts métalliques (9, 10), une surface axiale d'appui (respectivement 16, 17), qui entoure de manière concentrique l'axe d'articulation (18), est réalisée sous la forme d'une élévation annulaire (15), qui porte contre l'autre surface axiale d'appui (respectivement 17, 16), et en ce que l'axe d'articulation (18) est maintenu de manière antitorsion dans l'un (10) des deux inserts métalliques et présente, à l'une de ses extrémités, un élargissement radial (21) constituant une surface axiale d'appui (22), qui porte contre l'envers (23) de l'élévation annulaire (15) adjacente.
  2. Pince selon la revendication 1, caractérisée en ce qu'un insert métallique (9) est pourvu de l'alésage (12), l'autre insert métallique (10) étant pourvu d'une ouverture (11) non ronde, telle que par exemple une ouverture polygonale, et en ce que l'axe d'articulation (18) passe dans l'alésage (12) ainsi que dans l'ouverture (11) et est maintenu, de manière antitorsion, par rapport à l'ouverture (11) à l'aide de surfaces de contact adaptées à l'ouverture (11).
  3. Pince selon la revendication 2, caractérisée en ce que la surface radiale d'appui de l'axe d'articulation (18), placée dans l'alésage (12), se trouve entre la surface axiale d'appui (22) et les surfaces de contact de l'ouverture (11).
  4. Pince selon la revendication 3, caractérisée en ce que l'axe d'articulation (18) est pourvu, à son autre extrémité, d'une vis de blocage (24).
  5. Pince selon l'une des revendications 1 à 4, caractérisée en ce que les inserts métalliques (9, 10) sont encastrés dans les corps moulés en matière plastique de telle sorte qu'exclusivement les éléments fonctionnels (4) ainsi que les zones annulaires situées tout autour de l'axe d'articulation, y compris les surfaces axiales d'appui (16, 17), soient exposés.
  6. Pince selon l'une des revendications précédentes, caractérisée en ce que l'insert métallique (9 ou bien 10) est, à l'exception de l'élément fonctionnel (4), une pièce de découpage, qui est soudée sur l'élément fonctionnel (4).
  7. Pince selon la revendication 6, caractérisée en ce que la pièce de découpage et l'élément fonctionnel sont assemblés au moyen d'un procédé de soudage TIG (soudage à l'arc en atmosphère inerte avec électrode de tungstène) sans produit d'apport de soudage.
  8. Pince selon l'une des revendications précédentes, caractérisée en ce que les deux branches (1, 2) de la pince sont fabriquées en polyamide, dans lequel l'insert métallique correspondant (9 ou bien 10) est encastré par liaison mécanique pendant l'opération d'injection.
  9. Pince selon l'une des revendications précédentes, caractérisée par un ressort (8) retenu entre des ergots (7) situés sur les poignées (5, 6), les ergots (7) étant pourvus, à leur extrémité, d'élargissements (7a) conformés à la manière d'une barbe.
EP96103123A 1996-03-01 1996-03-01 Pince avec deux branches en matiere platique, obtenues par moulage Expired - Lifetime EP0794039B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59603713T DE59603713D1 (de) 1996-03-01 1996-03-01 Zange mit zwei Zangenhälften aus Kunststoff-Formkörpern
AT96103123T ATE186864T1 (de) 1996-03-01 1996-03-01 Zange mit zwei zangenhälften aus kunststoff- formkörpern
ES96103123T ES2139968T3 (es) 1996-03-01 1996-03-01 Alicates con semi-alicates de cuerpos moldeados de plastico.
EP96103123A EP0794039B1 (fr) 1996-03-01 1996-03-01 Pince avec deux branches en matiere platique, obtenues par moulage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96103123A EP0794039B1 (fr) 1996-03-01 1996-03-01 Pince avec deux branches en matiere platique, obtenues par moulage

Publications (2)

Publication Number Publication Date
EP0794039A1 EP0794039A1 (fr) 1997-09-10
EP0794039B1 true EP0794039B1 (fr) 1999-11-24

Family

ID=8222520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103123A Expired - Lifetime EP0794039B1 (fr) 1996-03-01 1996-03-01 Pince avec deux branches en matiere platique, obtenues par moulage

Country Status (4)

Country Link
EP (1) EP0794039B1 (fr)
AT (1) ATE186864T1 (fr)
DE (1) DE59603713D1 (fr)
ES (1) ES2139968T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE20040399A1 (en) * 2004-06-14 2005-12-14 Seamus Duffy Parallel jaw locking snap ring pliers
DE102016109488A1 (de) * 2016-05-24 2017-11-30 G. Lang GmbH & Co. KG Betätigungselement, insbesondere Hebel oder Schraubenschlüssel, und Verfahren zu dessen Herstellung
TWI704037B (zh) * 2019-12-04 2020-09-11 鴻安國際興業有限公司 C型扣環鉗

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2483383A (en) * 1946-01-29 1949-09-27 Waldes Kohinoor Inc Tool for handling open-ended spring retaining rings
FR1247950A (fr) * 1959-07-30 1960-12-09 Pince perfectionnée
US3082652A (en) * 1959-07-30 1963-03-26 Marti Rene Pliers and like tools
FR1310734A (fr) * 1961-10-21 1962-11-30 Plast Outils Ets Outil du genre pince
US3833953A (en) * 1973-12-21 1974-09-10 Illinois Tool Works Dielectric tool
FR2440249A1 (fr) * 1978-10-30 1980-05-30 Sibille & Cie Ateliers Pince isolee perfectionnee
GB2119695A (en) * 1982-05-05 1983-11-23 Kenneth Robert Scott Pliers
FR2562622A1 (fr) * 1984-04-09 1985-10-11 Chavagne Jean Ressorts pour ecarter les poignees de pinces
CA1312454C (fr) * 1987-05-07 1993-01-12 James R. Jeromson, Jr. Outil manuel
DE9307010U1 (de) * 1993-05-08 1993-07-08 Hazet-Werk Hermann Zerver Gmbh & Co Kg, 5630 Remscheid Zange

Also Published As

Publication number Publication date
ES2139968T3 (es) 2000-02-16
ATE186864T1 (de) 1999-12-15
EP0794039A1 (fr) 1997-09-10
DE59603713D1 (de) 1999-12-30

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