EP0794039B1 - Pliers with two arms made from moulded plastic - Google Patents
Pliers with two arms made from moulded plastic Download PDFInfo
- 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
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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.
Abstract
Description
Die Erfindung betrifft eine Zange mit Zangenhälften aus Kunststoff-Formkörpern, die über ein Gewerbe verschwenkbar miteinander verbunden sind und deren eine Enden als Handgriff geformt und deren andere Enden mit einem dem jeweiligen Einsatzzweck entsprechenden, aus Metall bestehenden und aus dem Formkörper herausragenden Funktionselement versehen sind, wobei beide Funktionselemente in derselben Bewegungsebene angeordnet sind und jedes Funktionselement einstückiger Bestandteil eines in den Formkörper eingebetteten und von diesem größtenteils umschlossenen Metalleinsatzes ist, wobei jeder der beiden Metalleinsätze über den Bereich des Gewerbes hinaus mit einer vollständig in den Formkörper eingebetteten Verlängerung versehen ist, die sich bis in den Anfang der Handgriffe hinein erstreckt, und wobei zumindest einer der beiden Metalleinsätze mit einer Bohrung versehen ist, in der die Drehachse des Gewerbes gelagert ist.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.
Derartige Zangen mit zwei in einer gemeinsamen Bewegungsebene schwenkbaren Funktionselementen werden beispielsweise zum Öffnen von Sicherungsringen verwendet. Eine gattungsgemäße Zange ist aus der US-A 3,833,953 bekannt. Beide Zangenhälften bestehen jeweils aus Kunststoff-Formkörpern, die mit Metalleinsätzen verstärkt und im Bereich des Gewerbes mittels einer Schraubverbindung gegeneinander verspannt sind.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.
Es hat sich allerdings herausgestellt, daß sich die beiden Zangenhälften dieser Zange gerade beim Aufbringen hoher Betätigungskräfte relativ stark verwinden, so daß eine derartige Zange für hohe Betätigungskräfte ungeeignet ist. However, it has been found that the two pliers halves of this Twist the pliers relatively strongly, especially when applying high actuation forces, so that such pliers are unsuitable for high actuation forces.
Der Erfindung liegt die Aufgabe zugrunde, eine leichtgewichtige und verschleißarme Zange zu schaffen, welche bei hohen Betätigungskräften größte Bewegungspräzision und eine angenehm zu empfindende Krafteinleitung gewährleistet.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.
Zur Lösung wird bei einer Zange der eingangs genannten Art vorgeschlagen, daß an jedem der beiden Metalleinsätze eine die Drehachse konzentrisch umgebende axiale Lagerfläche als ringförmige Erhebung ausgebildet ist, welche an der jeweils anderen axialen Lagerfläche anliegt, und daß die Drehachse drehfest in einem der beiden Metalleinsätze gehalten ist und an ihrem einen Ende eine eine axiale Lagerfläche bildende, radiale Erweiterung aufweist, welche an der Rückseite der angrenzenden ringförmigen Erhebung anliegt.To solve the problem , it is proposed with pliers of the type mentioned at the outset that 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.
Eine solchermaßen ausgestaltete Zange ist durch die gezielte Verstärkung der Zangenhälften in dem die größte Bewegungspräzision fordernden Abschnitt zwischen Funktionselement und Gewerbe besonders verwindungsfest und gleichzeitig leichtgewichtig. Indem sich die Metalleinsätze lediglich bis in den Anfang der Handgriffe hinein erstrecken, ist zudem eine begrenzte Biegsamkeit der unteren Zangenhälften gegeben, die bei Einleitung großer Kräfte eine infolge einer gewissen Nachgiebigkeit als angenehm empfundene und damit komfortable Handhabung bietet. Darüber hinaus wird eine spielfreie und verschleißarme Lagerung durch die Ausgestaltung der axialen Lagerflächen sichergestellt. Infolge des flächigen Kontaktes der als ringförmige Erhebungen ausgestalteten Lagerflächen tritt neben einer Erhöhung der Verwindungsfestigkeit der Zange auch eine Reduzierung der Reibung und damit des Verschleißes im Bereich des Zangengewerbes ein. Dazu trägt auch bei, daß die Drehachse drehfest mit einem der Metalleinsätze verbunden ist und eine zusätzliche axiale Lagerfläche bildet, welche an der Rückseite der angrenzenden ringförmigen Erhebung anliegt.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. In addition, a backlash-free and low-wear Storage ensured by the design of the axial bearing surfaces. As a result of the flat contact of the as annular elevations designed storage space occurs in addition to an increase in torsional strength 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.
Gemäß einer Weiterbildung der Zange wird vorgeschlagen, daß der eine Metalleinsatz mit der Bohrung und der andere Metalleinsatz mit einer nicht-runden Öffnung, wie z.B. einer Mehrkantöffnung, versehen ist, und daß die Drehachse Bohrung und Öffnung zugleich durchragt und sie mittels an die Öffnung angepaßter Paßflächen drehfest bezüglich der Öffnung ist. Die in der Bohrung angeordnete radiale Lagerfläche der Drehachse kann sich zwischen der axialen Lagerfläche und den Paßflächen befinden. Auf diese Weise wird das Vorhandensein eines verstärkenden Metalleinsatzes zusätzlich dazu ausgenutzt, das Zangengewerbe spielfrei und verschleißarm zu lagern.According to a development of the pliers, it is proposed that the metal insert with the hole and the other metal insert with a non-round one Opening, e.g. a polygonal opening, and that 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.
Die Metalleinsätze dienen dazu, die Statik der Zange bei der Krafteinleitung über die Handgriffe zu verbessern, ferner die Festigkeit der Zange gegen ein Verwinden der Zangenhälften zu erhöhen, und schließlich die Reibung sowie den Verschleiß im Bereich des Zangengewerbes zu reduzieren. Die Metallensätze brauchen daher von außen nicht sichtbar zu sein, weshalb mit einer Weiterbildung vorgeschlagen wird, daß die Metalleinsätze soweit in die Kunststoff-Formkörper eingebettet sind, daß ausschließlich die Funktionselemente sowie ringförmige Bereiche rund um die Drehachse einschließlich der axialen Lagerflächen nicht von Kunststoff bedeckt sind.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.
Die Herstellung des Metalleinsatzes als Stanzteil ist aus Gründen der Produktionskosten angestrebt, wobei in diesem Fall das Funktionselement mit dem Stanzteil verschweißt ist. Hierbei hat es sich im Hinblick auf die Festigkeit der Verschweißung als vorteilhaft herausgestellt, wenn Stanzteil und Funktionselement durch ein WIG-Schweißverfahren ohne Schweißzusatz verbunden sind. Sofern der Metalleinsatz aus einem gestanzten Metallstück besteht, können die ringförmigen Erhebungen durch Kaltverformung des Bereiches rund um die spätere Drehachse hergestellt werden.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. Here 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. If 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.
Schließlich wird vorgeschlagen, daß die Zangenhälften aus Polyamid hergestellt sind, in das der jeweilige Metalleinsatz während des Spritzvorganges formschlüssig eingebettet wird. Zur Erhöhung der Festigkeit im Bereich der Handgriffe ist eine Faserverstärkung des verwendeten Polyamids möglich. Finally, it is proposed that 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.
Auf der Zeichnung ist ein Ausführungsbeispiel einer erfindungsgemäßen Zange dargestellt, und zwar zeigen darin:
- Fig. 1
- in einer Gesamtansicht eine Zange,
- Fig. 2
- eine Seitenansicht der Zange,
- Fig. 3
- einen Schnitt durch einen Teil einer der beiden Zangenhälften,
- Fig. 4
- einen Schnitt durch das Gewerbe der vollständigen Zange,
- Fig. 5
- eine teilweise geschnittene Ansicht der einen Zangenhälfte und
- Fig. 6
- eine teilweise geschnittene Ansicht der anderen Zangenhälfte.
- Fig. 1
- in a general view a pair of pliers,
- Fig. 2
- a side view of the pliers,
- Fig. 3
- a section through part of one of the two pliers halves,
- Fig. 4
- a section through the trade of the complete pliers,
- Fig. 5
- a partially sectioned view of a pair of pliers and
- Fig. 6
- a partially sectioned view of the other half of the pliers.
Die in den Figuren 1 und 2 in Draufsicht und Seitenansicht dargestellte Zange
besteht aus zwei über ein Gewerbe 1 miteinander verbundenen Zangenhälften
2, 3, aus deren Enden Funktionselemente 4 herausragen. Die jeweils in einem
Zapfen auslaufenden Funktionselemente dienen dazu, die Enden handelsüblicher
Sicherungsringe zu ergreifen.The pliers shown in Figures 1 and 2 in plan view and side view
consists of two pliers halves connected by a
Beide Zangenhälften 2, 3 bestehen ganz überwiegend aus einem Formkörper
aus glasfaserverstärktem Polyamid. An den Innenseiten der Handgriffe 5, 6
der Zangenhälften 1, 2 sind Zapfen 7 angeformt, zwischen denen sich ein Federelement
8 einsetzen läßt. Erweiterungen 7a des Zapfenendes nach Art von
Widerhaken verhindern, daß sich das Federelement 8 versehentlich löst.Both
In das Kunststoffmaterial jeder Zangenhälfte 2, 3 wird jeweils ein Metalleinsatz
9, 10 eingebettet, wie die Figuren 5 und 6 erkennen lassen. Bei dem
Metalleinsatz 9, 10 handelt es sich um ein flaches Stanzteil, welches an seinem
einen Ende mit dem Funktionselement 4 verbunden ist. Als Verbindungstechnik
zwischen dem gehärteten Funktionselement 4 und dem nicht wärmebehandelten
Metalleinsatz 9, 10 hat sich ein WIG-Schweißverfahren ohne
Schweißzusätze als geeignet herausgestellt. 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. In which
Metal insert 9, 10 is a flat stamped part, which on its
one end is connected to the
Die Figuren 5 und 6 lassen ferner erkennen, daß ausschließlich das für das
Arbeiten mit der Zange wichtige Ende des Funktionselementes 4 aus dem
Formkörper der jeweiligen Zangenhälfte 2, 3 herausragt, ansonsten jedoch ein
Teil des Funktionselements 4 sowie der vollständige Metalleinsatz 9, 10 in den
Kunststoff-Formkörper eingebettet ist.Figures 5 and 6 also show that only that for
Working with the pliers important end of the
Der Metalleinsatz 9, 10 umschließt mit einer Öffnung 11 bzw. Bohrung 12 die
Drehachse des Gewerbes 1, so daß sich eine starre metallische Verbindung
von der Spitze des Funktionselementes 4 bis zu dem Gewerbe 1 ergibt. Darüber
hinaus ist jeder der beiden Metalleinsätze 9, 10 über den Bereich des
Gewerbes 1 hinaus mit einer Verlängerung 13 versehen, die sich bis in den
Anfang des jeweiligen Handgriffes 5, 6 hinein erstreckt. Die Länge der Verlängerungen
13 ist dergestalt, daß diese bis in das erste Drittel der Länge L des
Griffbereiches der Handgriffe 5, 6 ragen.The metal insert 9, 10 encloses the
Anhand der Fig. 3 wird nunmehr die Gestaltung der Metalleinsätze 9 im Bereich
des Gewerbes 1 erläutert. In Fig. 3 dargestellt ist der mit einer runden
Bohrung 12 versehene Metalleinsatz 9, jedoch gelten die nachfolgenden Ausführungen
für die andere Zangenhälfte mit dem Metalleinsatz 10 gleichermaßen.
Der Metalleinsatz 9 ist im Bereich des Gewerbes 1 mit einer Einsenkung
14 versehen, die ihrerseits um die Drehachse des Gewerbes herum mit einer
ringförmigen Erhebung 15 versehen ist. Die ringförmige Erhebung 15 bildet
auf ihrer Oberseite eine ebene axiale Lagerfläche 16, die die Bohrung 12 und
damit die Drehachse des Gewerbes konzentrisch umgibt. Die axiale Lagerfläche
16 befindet sich exakt in der Bewegungsebene B für die Schwenkbewegung
des Funktionselementes 4. An der axialen Lagerfläche 16 liegt die korrespondierende
axiale Lagerfläche 17 der anderen Zangenhälfte 3 an, was im
einzelnen in Fig. 4 dargestellt ist.3, the design of the
Die Fig. 3 läßt ferner erkennen, daß der Metalleinsatz 9 einschließlich des
Funktionselementes 4 soweit in den Kunststoff-Formkörper der Zangenhälfte 2
eingebettet ist, daß ausschließlich die Spitze des Funktionselementes 4 sowie
ringförmige Bereiche rund um die Drehachse einschließlich der axialen Lagerfläche
16 freibleiben. Dies gilt in gleicher Weise für die andere Zangenhälfte 3.
Zu diesem Zweck wird bei der Herstellung der Zangenhälften 2, 3 der bereits
mit dem Funktionselement versehene Metalleinsatz in die Spritzform eingelegt,
und dann der flüssige Kunststoff in die Form eingepreßt, so daß dieser die
Metallteile in der genannten Form umschließt.Fig. 3 also reveals that the
Anhand der Fig. 4 werden nunmehr Einzelheiten des Gewerbes 1 und der
verwendeten Drehachse 18 aus Metall erläutert. Die Drehachse 18 setzt sich
aus einem zylindrischen Abschnitt 19, einem mit Paßflächen versehenen Abschnitt
20 und einer radialen Erweiterung 21 außerhalb der Metalleinsätze 9,
10 zusammen. Der mit Paßflächen versehene Abschnitt 20 durchragt die Öffnung
11 in dem Metalleinsatz 10, während der zylindrische Abschnitt 19 die
Bohrung 12 in dem Metalleinsatz 9 durchragt. Hierbei ist der zylindrische Abschnitt
19 von geringfügig kürzerer Länge als die Bohrung 12. Die Paßflächen
20 des Abschnittes 20 sind auf die Gestalt der ebenfalls Paßflächen aufweisenden
Öffnung 11 abgestimmt, so daß die Drehachse 18 verdrehfest bezüglich
des Metalleinsatzes 10 ist. Hingegen kann der andere Metalleinsatz 9 frei
auf dem zylindrischen Abschnitt 19 der Drehachse 18 drehen, und bildet daher
das eigentliche Drehgelenk des Gewerbes. Um ein Herausfallen der Drehachse
18 zu verhindern, ist eine Sicherungsschraube 24 von der anderen Seite
aus in die mit einem Gewinde versehene Drehachse 18 eingeschraubt. Da die
Drehachse 18 drehfest in dem Metalleinsatz 10 gehalten ist, kann keine Relativbewegung
und damit auch keine Reibung an der Sicherungsschraube 24
auftreten, weshalb eine Selbstsicherung von Drehachse 18 und Sicherungsschraube
24 vorliegt.4 details of
Die radiale Abstützung des Drehgelenks erfolgt einerseits mittels der aneinanderliegenden
axialen Lagerflächen 16, 17 der beiden Metalleinsätze 9, 10 und
andererseits mittels einer weiteren axialen Lagerfläche 22, die sich an der radialen
Erweiterung 21 der Drehachse 18 befindet. Diese axiale Lagerfläche 22
stützt sich flächig an der Rückseite 23 der ringförmigen Erhebung 15 des
Metalleinsatzes 9 ab. Im Zusammenwirken bilden Drehachse 18 und Sicherungsschraube
24 daher ein Widerlager für die axialen Kräfte sowie die Torsionskräfte
im Gewerbe 1. 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
- 11
- GewerbeBusiness
- 22nd
- erste Zangenhälftefirst half of the pliers
- 33rd
- zweite Zangenhälftesecond half of the pliers
- 44th
- FunktionselementFunctional element
- 55
- erster Handgrifffirst handle
- 66
- zweiter Handgriffsecond handle
- 77
- ZapfenCones
- 7a7a
- Erweiterung des ZapfenendesExtension of the tenon end
- 88th
- FederelementSpring element
- 99
- erster Metalleinsatzfirst metal insert
- 1010th
- zweiter Metalleinsatzsecond metal insert
- 1111
- Öffnungopening
- 1212th
- Bohrungdrilling
- 1313
- Verlängerungrenewal
- 1414
- EinsenkungSinking
- 1515
- ringförmige Erhebungring-shaped elevation
- 1616
- axiale Lagerflächeaxial bearing surface
- 1717th
- axiale Lagerflächeaxial bearing surface
- 1818th
- DrehachseAxis of rotation
- 1919th
- zylindrischer Abschnittcylindrical section
- 2020th
- mit Paßflächen versehener Abschnittsection provided with mating surfaces
- 2121
- radiale Erweiterungradial expansion
- 2222
- axiale Lagerflächeaxial bearing surface
- 2323
- Rückseiteback
- 2424th
- SicherungsschraubeLocking screw
- LL
- Länge des HandgriffsHandle length
- BB
- BewegungsebenePlane of movement
Claims (9)
- Pliers having plier halves (1, 2) of plastic moulded bodies, which are pivotably connected to one another via a joint (1) and whose one ends are formed as a handle (5, 6) and whose other ends are provided with a functional element (4), which corresponds to the respective application, is made of metal and projects from the moulded body, both functional elements (4) being arranged in the same motion plane (B), and each functional element (4) being a one-piece component of a metal insert (9, 10) embedded in the moulded body and largely enclosed by the latter, each of the two metal inserts (9, 10), beyond the region of the joint (1), being provided with an extension (13), which is completely embedded in the moulded body and extends right into the initial part of the handles (5, 6), and at least one of the two metal inserts (9, 10) being provided with a bore (12), in which the pivot (18) of the joint (1) is mounted, characterized in that an axial bearing surface (16 or 17 respectively) concentrically surrounding the pivot (18) is formed as an annular prominence (15) on each of the two metal inserts (9, 10) and bears against the respectively other axial bearing surface (17 or 16 respectively), and in that the pivot (18) is held in a rotationally locked manner in one of the two metal inserts (10) and has a radial widened portion (21) at its one end, and this radial widened portion (21) forms an axial bearing surface (22) and bears against the rear side (23) of the adjoining, annular prominence (15).
- Pliers according to Claim 1, characterized in that one metal insert (9) is provided with the bore (12) and the other metal insert (10) is provided with a non-circular opening (11), such as, for example, a polygonal opening, and in that the pivot (18) projects through both the bore (12) and the opening (11) and it is fixed in a rotationally locked manner relative to the opening (11) by means of fitting surfaces adapted to the opening (11).
- Pliers according to Claim 2, characterized in that the radial bearing surface, arranged in the bore (12), of the pivot (18) is located between the axial bearing surface (22) and the fitting surfaces of the opening (11).
- Pliers according to Claim 3, characterized in that the pivot (18) is provided with a locking screw (24) at its other end.
- Pliers according to one of Claims 1 to 4, characterized in that the metal inserts (9, 10) are embedded in the plastic moulded bodies to such an extent that only the functional elements (4) and annular regions all around the pivot including the axial bearing surfaces (16, 17) are exposed.
- Pliers according to one of the preceding claims, characterized in that the metal insert (9 or 10 respectively), with the exception of the functional element (4), is a stamping, which is welded to the functional element (4).
- Pliers according to Claim 6, characterized in that the stamping and the functional element are connected by a TIG welding process without welding filler.
- Pliers according to one of the preceding claims, characterized in that the plier halves (1, 2) are made of polyamide, in which the respective metal insert (9 or 10 respectively) is embedded in a positive-locking manner during the injection-moulding operation.
- Pliers according to one of the preceding claims, characterized by a spring (8) held between pins (7) of the handles (5, 6), the pins (7) being provided with widened portions (7a) arranged at their end and designed like a barb.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96103123A EP0794039B1 (en) | 1996-03-01 | 1996-03-01 | Pliers with two arms made from moulded plastic |
| AT96103123T ATE186864T1 (en) | 1996-03-01 | 1996-03-01 | PLIERS WITH TWO PLIERS HALF MADE OF PLASTIC MOLDED BODY |
| ES96103123T ES2139968T3 (en) | 1996-03-01 | 1996-03-01 | PLIERS WITH SEMI-PLASTIC BODY PLIERS. |
| DE59603713T DE59603713D1 (en) | 1996-03-01 | 1996-03-01 | Pliers with two pliers halves made of molded plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96103123A EP0794039B1 (en) | 1996-03-01 | 1996-03-01 | Pliers with two arms made from moulded plastic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0794039A1 EP0794039A1 (en) | 1997-09-10 |
| EP0794039B1 true EP0794039B1 (en) | 1999-11-24 |
Family
ID=8222520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96103123A Expired - Lifetime EP0794039B1 (en) | 1996-03-01 | 1996-03-01 | Pliers with two arms made from moulded plastic |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0794039B1 (en) |
| AT (1) | ATE186864T1 (en) |
| DE (1) | DE59603713D1 (en) |
| ES (1) | ES2139968T3 (en) |
Families Citing this family (3)
| 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 (en) * | 2016-05-24 | 2017-11-30 | G. Lang GmbH & Co. KG | Actuator, in particular lever or wrench, and method for its production |
| TWI704037B (en) * | 2019-12-04 | 2020-09-11 | 鴻安國際興業有限公司 | Circlip pliers |
Family Cites Families (10)
| 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 |
| US3082652A (en) * | 1959-07-30 | 1963-03-26 | Marti Rene | Pliers and like tools |
| FR1247950A (en) * | 1959-07-30 | 1960-12-09 | Advanced pliers | |
| FR1310734A (en) * | 1961-10-21 | 1962-11-30 | Plast Outils Ets | Pliers type tool |
| US3833953A (en) * | 1973-12-21 | 1974-09-10 | Illinois Tool Works | Dielectric tool |
| FR2440249A1 (en) * | 1978-10-30 | 1980-05-30 | Sibille & Cie Ateliers | Insulated pliers for electrical installation - is completely externally insulated except for jaws and pivoting surfaces |
| GB2119695A (en) * | 1982-05-05 | 1983-11-23 | Kenneth Robert Scott | Pliers |
| FR2562622A1 (en) * | 1984-04-09 | 1985-10-11 | Chavagne Jean | Springs for moving apart the handles of pliers |
| CA1312454C (en) * | 1987-05-07 | 1993-01-12 | James R. Jeromson, Jr. | Hand tool |
| DE9307010U1 (en) * | 1993-05-08 | 1993-07-08 | Hazet-Werk Hermann Zerver Gmbh & Co Kg, 5630 Remscheid, De |
-
1996
- 1996-03-01 AT AT96103123T patent/ATE186864T1/en active
- 1996-03-01 DE DE59603713T patent/DE59603713D1/en not_active Expired - Lifetime
- 1996-03-01 EP EP96103123A patent/EP0794039B1/en not_active Expired - Lifetime
- 1996-03-01 ES ES96103123T patent/ES2139968T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0794039A1 (en) | 1997-09-10 |
| DE59603713D1 (en) | 1999-12-30 |
| ES2139968T3 (en) | 2000-02-16 |
| ATE186864T1 (en) | 1999-12-15 |
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