EP0861707B1 - Wrench - Google Patents

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Publication number
EP0861707B1
EP0861707B1 EP98103075A EP98103075A EP0861707B1 EP 0861707 B1 EP0861707 B1 EP 0861707B1 EP 98103075 A EP98103075 A EP 98103075A EP 98103075 A EP98103075 A EP 98103075A EP 0861707 B1 EP0861707 B1 EP 0861707B1
Authority
EP
European Patent Office
Prior art keywords
tongs
wrench according
leading
joint
faces
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
EP98103075A
Other languages
German (de)
French (fr)
Other versions
EP0861707A2 (en
EP0861707A3 (en
Inventor
Stefan Pfab
Alfons Tulay
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.)
HARRY P WILL WERKZEUGFABRIK GmbH and Co KG
Original Assignee
HARRY P WILL WERKZEUGFABRIK 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.)
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Publication date
Application filed by HARRY P WILL WERKZEUGFABRIK GmbH and Co KG filed Critical HARRY P WILL WERKZEUGFABRIK GmbH and Co KG
Publication of EP0861707A2 publication Critical patent/EP0861707A2/en
Publication of EP0861707A3 publication Critical patent/EP0861707A3/en
Application granted granted Critical
Publication of EP0861707B1 publication Critical patent/EP0861707B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/02Jaws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/06Joints
    • B25B7/10Joints with adjustable fulcrum

Definitions

  • the present invention relates to a gripper according to the preamble of Claim 1, which is known from document DE 3 303 368 A.
  • Gripping pliers of this type which for certain applications are also used as water pumps or.
  • Armature pliers are generally known to have two articulated connections Pliers legs that grip in the lower area. In the top or Each leg has an angled, preferably serrated, head region Gripping jaw. To adapt them to something that is tangible or exciting Workpiece, the legs are longitudinally and angularly movable against each other.
  • the arrangement and design of the joint is important. Relatively easy slide and grooved sliding joints are to be realized; but if hard High shear forces and moments occur, this can lead to wear, to rattle and even to break the often not very strong joint pin to lead.
  • Push-through grippers according to DE 90 03 285 U1 have an adjusting roller, the internal thread with a rear Teeth of the guided leg screws, so that the workpiece has a stepless Setting is possible. This usually also requires two-hand operation ahead, for which sufficient space must be available.
  • a solid construction with low wear is also sought Joint that enables comfortable use with increased handling safety.
  • the invention provides according the characterizing part of claim 1 that the sliding joint is a disc has, which is rotatably mounted in a head region of the guided pliers leg is, in turn, stores the locking pin and with guide surfaces on the leading Pliers legs can be moved along in the parallel recess.
  • An advantageous guide support of the guided pliers leg is achieved one according to claim 3, by parallel, projecting transversely from the joint disc Guide surfaces rest on sliding surfaces of the leading pliers leg.
  • The is further supported according to claim 4 in that the guide surfaces of the The leading pliers leg out of the parallel recess embrace.
  • a very convenient usability is achieved in accordance with claim 6, if the locking pin can be locked in a selectable position on the locking steps by the Handles are opened, the guided pliers leg against the gripper jaw closing direction is moved and the handles are closed.
  • claim 7 is a parallel adjustment of the gripper jaws from a larger or maximum distance possible with the legs closed by using the guided pliers legs under the contact of a stop body with the locking steps provided sliding surfaces without pivoting the handles in the closing direction is movable along.
  • the gripping size is therefore only adjusted on the pliers legs, without manual locking adjustment in the joint area required would. For example, ten locking levels are at a maximum gripping distance of 50 mm can be easily realized.
  • Claim 11 provides that the locking pin is spring-loaded and one between Angle stops of the joint disc limited swiveling, guided by the Pliers leg has detectable driver. This is a remarkable one Advantage over conventional gripping pliers with rigid locking bolts, which Opening and closing the pliers could complicate.
  • the suspension can be loud Claim 12 advantageously be designed so that one on or in the joint disc spring held the locking pin in the direction of the driver loaded on a lower angle stop surface of the joint disc. specially can attack a compression spring according to claim 13, preferably arranged together with her in a recess of the joint disc Radial arm.
  • the simple manufacture and assembly is also claimed 14 supported by the fact that the driver e.g. pen-shaped, with the Locking pin is radially connected pressure piece and that two angular stops of Surfaces are formed that have a recess on a flat step of the joint disk limit.
  • yet another embodiment of the invention consists in that the guided pliers leg next to the joint disc a stop body with a nose assigned to the driver, pressure surface or the like.
  • the stop body according to claim 17 can be closed Grips on the back sliding surfaces of the leading pliers leg Have surface that contributes to leadership on the one hand, but as a effective pinch protection.
  • Another security measure provides for claim 18, according to which the guided Pliers legs to relieve the joint when opening a safety stop has, especially on the side of the lower jaw and opposite one Stop body.
  • the leading pliers leg comes when opening the Gripping pliers on the safety stop to the system, so that it acts Absorbs forces or moments and the joint disc does not support it can be tilted.
  • the gripping tongs shown in FIGS. 1 and 2 are generally designated 10. She has a leading pliers leg F and a guided pliers leg G, which in a head region 18 pivotally connected to one another via a sliding joint 20 are.
  • the pliers legs F, G run out at the lower end in handles 12 and 13; the upper ends are designed as gripping jaws 14, 15.
  • the leading pliers leg F has a parallel recess 42 towards the head region 18 through which the Head area of the guided pliers leg G is inserted.
  • the sliding joint 20 has a joint disk 22 of relatively large size Diameter D, which is rotatable about an axis C in the head area of the guided Pliers legs stored and with guide surfaces 23, 24 on the leading Pliers leg F is movable along in the parallel recess 42.
  • the diameter D of the joint disc is larger than the width b of the leading pliers leg F in the head region 18.
  • the guide surfaces stand from the joint disk 22 23, 24 in parallel so that the leading pliers leg F from the Grip out parallel recess 42 and guide on its sliding surfaces 50, 54.
  • the rear sliding surfaces 50 are provided with locking steps 52 into which Locking pin 30 can engage, which in the joint plate 22 parallel to the axis C is mounted and has 32 flats 34 at its ends (FIGS. 3 and 6).
  • the flats 34 merge into a corner part 35 at the lower end Shape of that of the back sliding surfaces 50 of the leading pliers leg F is the same or at least similar.
  • FIGS. 3 to 6 Details of the structure are shown in FIGS. 3 to 6. You can see that the joint disc 22 has an asymmetrical recess 26 in the middle to one with the locking pin 30 fixed radial lever 36 and a compression spring 38 record. This loads the radial lever 36 and thus the locking pin 30, which is slidably mounted in a bearing 28 of the flexible disc 22 and after outside has a driver in the form of a pressure piece 40, which when closed Pliers legs F, G comes to rest on a lower angle stop 47. This is on a flat step 62 as the lower limit of a recess 46 provided, which is limited at the top by a further angle stop 48.
  • the stop body 56 also has a sliding surface 58, which at the pinch protection closed pliers legs F, G is used (Fig. 3 and 6). You prevented by System on the rear sliding surfaces 50 of the leading pliers leg F a finger clamp. This safety is also effective when using the pliers large gripping dimension between the gripping jaws 14, 15 is closed.
  • the sliding surface 58 of the stop body 56 enables and supports as well as the elastic stored locking bolt 30 a movement in the closing direction S, for what only the force of the compression spring 38 is to be overcome.
  • the locking pin leads to this Upward movement of the guided pliers leg G from level to level one small swivel until it comes close to the gripping dimension of a (not drawn) workpiece the last possible detent step 52 has been reached.
  • the guided pliers leg G also has the gripping jaw 14 facing Part of the head area 18 has a securing stop 64, which relieves the joint serves in the fully open pliers position (Fig. 6). Then he comes Securing stop 64 on the front sliding surface 54 of the leading pliers leg F to the system so that a further spread is not possible.
  • a gripping toothing provided on the gripping jaws 14, 15 16 may be designed differently from the illustrations. They also have to Stop body 56, 64 do not necessarily have the shapes shown. you but recognizes that a gripping pliers 10 according to the invention a plug Sliding joint for connecting two pliers legs in such a way that gripping jaws 14, 15 face each other at an adjustable distance.
  • a leading pliers leg F takes a guided pliers leg in a parallel recess 44 G slidably on.
  • a disc 22 of the slide joint 20 is in one Head region 18 of the guided pliers leg G rotates and in turn supports a locking pin 30 offset at the end; it is on with guide surfaces 23, 24 along the leading pliers leg F in the parallel recess 42.
  • the diameter D of the joint disc 22 is larger than the width b of the leading one Pliers leg F, which has locking steps 52 and sliding surfaces 50 on the back which flats 34 semi-cylindrical locking pin ends 32 non-positively issue.
  • the spring-loaded locking pin 30 is eccentric in the flexible disk 22 so that its axis of rotation P in the through the rear sliding surfaces 50 defined plane, and it has a between angular stops 47, 48 of the joint disc 22 limited pivotable by the guided pliers legs G detectable driver 40, e.g.
  • the guided pliers leg G has a stop body in addition to the joint disk 22 56 with pressure surfaces 58, 60 and a safety stop 64.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Harvester Elements (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Abstract

The pliers have two shanks (F,G) terminating in hand grips (12,13). The upper ends of the two shanks terminate in profiled grip jaws (14,15). The two halves are linked by a pivot on a sliding mounting to alter the spacing of the jaws. The sliding setting is secured by a ratchet (52) along the rear edge of one half and gripped by a ratchet grip (40) on the other section. The pivot section of the pliers has a rotating plate (18) which supports the ratchet grip at one edge. The plate also has two parallel lips to form the sliding guide for the other half of the pliers.

Description

Die vorliegende Erfindung betrifft eine Greifzange gemäß dem Oberbegriff von Anspruch 1, die aus dem Dokument DE 3 303 368 A bekannt ist.The present invention relates to a gripper according to the preamble of Claim 1, which is known from document DE 3 303 368 A.

Derartige Greifzangen, die für gewisse Anwendungen auch als Wasserpumpen-bzw. Armaturzangen bezeichnet werden, haben allgemein zwei gelenkig verbundene Zangenschenkel, die im unteren Bereich in Griffe auslaufen. Im oberen oder Kopf-Bereich weist jeder Schenkel eine abgewinkelte, vorzugsweise gezahnte Greifbacke auf. Zu deren Anpassung an ein zu greifendes oder zu spannendes Werkstück sind die Schenkel gegeneinander längs- und winkelbeweglich.Gripping pliers of this type, which for certain applications are also used as water pumps or. Armature pliers are generally known to have two articulated connections Pliers legs that grip in the lower area. In the top or Each leg has an angled, preferably serrated, head region Gripping jaw. To adapt them to something that is tangible or exciting Workpiece, the legs are longitudinally and angularly movable against each other.

Wichtig ist die Anordnung und Ausbildung des Gelenks. Verhältnismäßig einfach sind aufgelegte Gleit- und Rillengleitgelenke zu realisieren; wenn aber bei harter Beanspruchung große Scherkräfte und -momente auftreten, kann das zu Verschleiß, zu Klapperspiel und sogar zum Bruch des vielfach nicht sehr starken Gelenkzapfens führen. The arrangement and design of the joint is important. Relatively easy slide and grooved sliding joints are to be realized; but if hard High shear forces and moments occur, this can lead to wear, to rattle and even to break the often not very strong joint pin to lead.

Letzterer findet bei durchgestecktem Gleitgelenk im oder am führenden Zangenschenkel beiderseits Abstützung, was man schon vor Jahrzehnten auch mit Druckknopf-Schnellverstellung kombiniert hat. Dabei muß die Zange meist weit geöffnet, d.h. beidhändig benutzt werden. Durchsteck-Greifzangen gemäß DE 90 03 285 U1 haben eine Stellrolle, deren Innengewinde mit einer rückseitigen Zahnung des geführten Schenkels schraubt, so daß am Werkstück eine stufenlose Einstellung möglich ist. Auch das setzt in der Regel eine Zwei-Hand-Bedienung voraus, wofür genügend Raum zur Verfügung stehen muß.The latter takes place in or on the leading pliers leg when the sliding joint is inserted support on both sides, which you had with decades ago Has combined push button quick adjustment. The pliers usually have to be wide open, i.e. can be used with both hands. Push-through grippers according to DE 90 03 285 U1 have an adjusting roller, the internal thread with a rear Teeth of the guided leg screws, so that the workpiece has a stepless Setting is possible. This usually also requires two-hand operation ahead, for which sufficient space must be available.

Es ist ein wichtiges Ziel der Erfindung, eine verbesserte Greifzange der eingangs genannten Art zu schaffen, die auf einfache Weise und in großem Bereich verstellbar ist. Angestrebt wird ferner eine solide Konstruktion mit verschleißarmem Gelenk, die bei erhöhter Handhabungs-Sicherheit bequemen Gebrauch ermöglicht.It is an important object of the invention to provide an improved gripper at the beginning to create the type that is adjustable in a simple manner and over a wide range is. A solid construction with low wear is also sought Joint that enables comfortable use with increased handling safety.

Hauptmerkmale der Erfindung sind in Anspruch 1 angegeben. Ausgestaltungen sind Gegenstand der Ansprüche 2 bis 18.Main features of the invention are set out in claim 1. refinements are the subject of claims 2 to 18.

Bei einer Greifzange mit zwei Zangenschenkeln, die in ihrem unteren Bereich jeweils in einen Griff auslaufen und im oberen Bereich mit je einer abgewinkelten, vorzugsweise gezahnten Greifbacke einstückig sind, mit einem durchgesteckten Gleitgelenk zur Verbindung der Zangenschenkel derart, daß sich die Greifbacken in einstellbarem Abstand gegenüberstehen, wobei ein führender Zangenschenkel eine Anzahl von Raststufen sowie in deren Bereich eine Parallelaussparung hat, in der ein geführter Zangenschenkel gleitbeweglich und mittels eines endseitig abgesetzten Bolzens an den Raststufen verrastbar ist, sieht die Erfindung gemäß dem kennzeichnenden Teil von Anspruch 1 vor, daß das Gleitgelenk eine Scheibe aufweist, die in einem Kopfbereich des geführten Zangenschenkels drehbar gelagert ist, ihrerseits den Rastbolzen lagert und mit Führungsflächen an dem führenden Zangenschenkel in der Parallelaussparung entlangbewegbar ist. Dieser verhältnismäßig einfache Aufbau gewährleistet hohe mechanische Beanspruchbarkeit und Sicherheit. Außerdem erzielt man eine schlanke, kompakte Form ohne seitliche Überstände, so daß man mit der Zange auch an schwer zugänglichen Stellen gut hantieren kann. Durch die Scheibe werden die wirkenden Kräfte bzw. Momente an einem großen Durchmesser aufgenommen, was wesentlich zur Verschleißminderung beiträgt und eine Bruchgefahr praktisch ausschließt. Günstig ist insbesondere laut Anspruch 2 eine solche Bemessung, daß der Durchmesser der Gelenkscheibe größer ist als die Breite des führenden Zangenschenkels.With a gripper with two pliers legs, each in their lower area run out in a handle and in the upper area with an angled, preferably toothed gripping jaw are in one piece, with a plug-through Sliding joint for connecting the pliers legs in such a way that the gripping jaws face each other at an adjustable distance, with a leading pliers leg has a number of locking steps and a parallel recess in their area, in which a guided pliers leg is slidable and by means of one end offset bolt can be locked at the locking stages, the invention provides according the characterizing part of claim 1 that the sliding joint is a disc has, which is rotatably mounted in a head region of the guided pliers leg is, in turn, stores the locking pin and with guide surfaces on the leading Pliers legs can be moved along in the parallel recess. This relatively simple structure ensures high mechanical strength and security. You also get a slim, compact shape without lateral protrusions, so that the pliers can be used even on hard-to-reach areas Can handle well. The acting forces or Moments recorded on a large diameter, which is essential for Reduces wear and practically eliminates the risk of breakage. Cheap is in particular according to claim 2 such a dimensioning that the diameter the joint disc is larger than the width of the leading pliers leg.

Eine vorteilhafte Führungs-Abstützung des geführten Zangenschenkels erzielt man gemäß Anspruch 3, indem parallele, von der Gelenkscheibe quer abstehende Führungsflächen an Gleitflächen des führenden Zangenschenkels anliegen. Das wird nach Anspruch 4 noch dadurch unterstützt, daß die Führungsflächen der Gelenkscheibe den führenden Zangenschenkel aus der Parallelaussparung heraus umgreifen.An advantageous guide support of the guided pliers leg is achieved one according to claim 3, by parallel, projecting transversely from the joint disc Guide surfaces rest on sliding surfaces of the leading pliers leg. The is further supported according to claim 4 in that the guide surfaces of the The leading pliers leg out of the parallel recess embrace.

Wichtig ist die Weiterbildung von Anspruch 5, wonach der führende Zangenschenkel beiderseits der Parallelaussparung rückseitig mit jeweils fluchtenden Raststufen versehene Gleitflächen hat, an denen Anflachungen von Enden des Rastbolzens kraftschlüssig anliegen. Dies gestattet eine außerordentlich einfache Verrastung, wobei die Rastbolzen-Enden an den Gleitflächen des führenden Zangenschenkels beiderseits angreifen und daher eine zuverlässige Abstützung gewährleisten.It is important to further develop claim 5, according to which the leading pliers leg on both sides of the parallel recess on the back with aligned Has locking steps provided sliding surfaces on which flat ends of the Fit the locking bolt non-positively. This allows an extremely simple one Locking, the locking pin ends on the sliding surfaces of the leading Pliers legs attack on both sides and therefore a reliable support guarantee.

Eine sehr bequeme Bedienbarkeit erreicht man im Einklang mit Anspruch 6, wenn der Rastbolzen an den Raststufen in wählbarer Position verrastbar ist, indem die Griffe geöffnet werden, der geführte Zangenschenkel entgegen der Greifbacken-Schließrichtung bewegt wird und die Griffe geschlossen werden. Nach Anspruch 7 ist eine Parallelverstellung der Greifbacken von größerem oder maximalem Abstand herunter auf Greifmaß bei geschlossenen Schenkeln möglich, indem der geführte Zangenschenkel unter Anlage eines Anschlagkörpers an den mit Raststufen versehenen Gleitflächen ohne Verschwenkung der Griffe in Schließrichtung entlangbewegbar ist. Mithin erfolgt die Greifmaß-Einstellung nur an den Zangenschenkeln, ohne daß eine manuelle Rasteinstellung im Gelenkbereich erforderlich wäre. Beispielsweise zehn Raststufen sind bei einem maximalen Greifabstand von 50 mm ohne weiteres realisierbar.A very convenient usability is achieved in accordance with claim 6, if the locking pin can be locked in a selectable position on the locking steps by the Handles are opened, the guided pliers leg against the gripper jaw closing direction is moved and the handles are closed. According to claim 7 is a parallel adjustment of the gripper jaws from a larger or maximum distance possible with the legs closed by using the guided pliers legs under the contact of a stop body with the locking steps provided sliding surfaces without pivoting the handles in the closing direction is movable along. The gripping size is therefore only adjusted on the pliers legs, without manual locking adjustment in the joint area required would. For example, ten locking levels are at a maximum gripping distance of 50 mm can be easily realized.

Verschiedene Rastbolzen-Ausgestaltungen sind in den Ansprüchen 8 bis 15 angegeben. So können seine Enden als längsgeteilte Halbzylinder ausgebildet sein, was für Fertigung und Montage vorteilhaft ist. Günstig ist es ferner, wenn der Rastbolzen gemäß Anspruch 9 in der Gelenkscheibe exzentrisch gelagert ist, vorzugsweise nach Anspruch 10 derart, daß die Drehachse des Rastbolzens in der durch die rückseitigen Gleitflächen des führenden Zangenschenkels definierten Ebene liegt. Das ist eine platzsparende Anordnung, die zugleich zu erleichterter Handhabung beiträgt.Different locking pin configurations are specified in claims 8 to 15. So its ends can be designed as longitudinally divided half cylinders, which is advantageous for manufacturing and assembly. It is also favorable if the Locking bolt according to claim 9 is mounted eccentrically in the joint disc, preferably according to claim 10 such that the axis of rotation of the locking pin in the one defined by the back sliding surfaces of the leading pliers leg Level lies. This is a space-saving arrangement that is also easier to do Handling contributes.

Anspruch 11 sieht vor, daß der Rastbolzen federbelastet ist und einen zwischen Winkelanschlägen der Gelenkscheibe begrenzt schwenkbaren, durch den geführten Zangenschenkel erfaßbaren Mitnehmer aufweist. Dies ist ein beachtlicher Vorzug gegenüber herkömmlichen Greifzangen mit starrem Rastbolzen, der das Öffnen und Schließen der Zange erschweren konnte. Die Federung kann laut Anspruch 12 vorteilhaft so ausgebildet sein, daß eine an oder in der Gelenkscheibe gehaltene Feder den Rastbolzen in Richtung zur Anlage des Mitnehmers an einer unteren Winkelanschlag-Fläche der Gelenkscheibe belastet. Speziell kann gemäß Anspruch 13 an dem Rastbolzen eine Druckfeder angreifen, bevorzugt über einen zusammen mit ihr in einer Aussparung der Gelenkscheibe angeordneten Radialhebel. Die einfache Fertigung und Montage wird ferner nach Anspruch 14 dadurch unterstützt, daß der Mitnehmer ein z.B. stiftförmiges, mit dem Rastbolzen radialverbundenes Druckstück ist und daß zwei Winkelanschläge von Flächen gebildet sind, die eine Ausnehmung an einer Flachstufe der Gelenkscheibe begrenzen.Claim 11 provides that the locking pin is spring-loaded and one between Angle stops of the joint disc limited swiveling, guided by the Pliers leg has detectable driver. This is a remarkable one Advantage over conventional gripping pliers with rigid locking bolts, which Opening and closing the pliers could complicate. The suspension can be loud Claim 12 advantageously be designed so that one on or in the joint disc spring held the locking pin in the direction of the driver loaded on a lower angle stop surface of the joint disc. specially can attack a compression spring according to claim 13, preferably arranged together with her in a recess of the joint disc Radial arm. The simple manufacture and assembly is also claimed 14 supported by the fact that the driver e.g. pen-shaped, with the Locking pin is radially connected pressure piece and that two angular stops of Surfaces are formed that have a recess on a flat step of the joint disk limit.

Zur formschlüssigen Verrastung trägt es vorteilhaft bei, wenn nach Anspruch 15 die End-Anflachungen des Rastbolzens in ein unteres Eckteil auslaufen, das den rückseitigen Gleitflächen am führenden Zangenschenkel formähnlich oder formgleich ist.For positive locking, it advantageously contributes if according to claim 15 the end flats of the locking pin run into a lower corner part, which the rear sliding surfaces on the leading pliers legs similar or identical in shape is.

Noch eine andere Ausgestaltung der Erfindung besteht laut Anspruch 16 darin, daß der geführte Zangenschenkel neben der Gelenkscheibe einen Anschlagkörper mit einer dem Mitnehmer zugeordneten Nase, Andruckfläche o.dgl. hat. Insbesondere kann der Anschlagkörper nach Anspruch 17 eine bei geschlossenen Griffen an den rückseitigen Gleitflächen des führenden Zangenschenkels anliegende Fläche aufweisen, die einerseits zur Führung beiträgt, andererseits aber als wirksamer Klemmschutz dient.According to claim 16, yet another embodiment of the invention consists in that the guided pliers leg next to the joint disc a stop body with a nose assigned to the driver, pressure surface or the like. Has. In particular, the stop body according to claim 17 can be closed Grips on the back sliding surfaces of the leading pliers leg Have surface that contributes to leadership on the one hand, but as a effective pinch protection.

Eine andere Sicherheitsmaßnahme sieht Anspruch 18 vor, wonach der geführte Zangenschenkel zur Gelenkentlastung beim Öffnen einen Sicherheitsanschlag hat, insbesondere auf der Seite der unteren Greifbacke und gegenüber einem Anschlagkörper. Der führende Zangenschenkel kommt beim weiten Öffnen der Greifzange an dem Sicherungsanschlag zur Anlage, so daß dieser wirkende Kräfte bzw. Momente aufnimmt und die Gelenkscheibe in ihrer Lagerung nicht verkantet werden kann.Another security measure provides for claim 18, according to which the guided Pliers legs to relieve the joint when opening a safety stop has, especially on the side of the lower jaw and opposite one Stop body. The leading pliers leg comes when opening the Gripping pliers on the safety stop to the system, so that it acts Absorbs forces or moments and the joint disc does not support it can be tilted.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus dem Wortlaut der Ansprüche und der folgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung. Darin zeigen:

Fig. 1
eine Draufsicht einer erfindungsgemäßen Greifzange,
Fig. 2
eine Seitenansicht der Zange von Fig. 1,
Fig. 3
eine vergrößerte Teil-Ansicht einer geschlossenen Zange, im Lagerbereich teilweise weggebrochen dargestellt,
Fig. 4
eine Seiten-Rückansicht der Zange von Fig. 3,
Fig. 5
eine Seiten-Stirnansicht der Zange von Fig. 3 und
Fig. 6
eine weiter vergrößerte Teil-Ansicht ähnlich Fig. 3, jedoch bei geöffneter Zange.
Further features, details and advantages of the invention result from the wording of the claims and the following description of exemplary embodiments with reference to the drawing. In it show:
Fig. 1
a plan view of a gripper according to the invention,
Fig. 2
a side view of the pliers of Fig. 1,
Fig. 3
2 shows an enlarged partial view of closed pliers, partially broken away in the storage area,
Fig. 4
3 shows a side rear view of the pliers of FIG. 3,
Fig. 5
a side end view of the pliers of Fig. 3 and
Fig. 6
a further enlarged partial view similar to FIG. 3, but with the pliers open.

Die in Fig. 1 und 2 dargestellte Greifzange ist allgemein mit 10 bezeichnet. Sie hat einen führenden Zangenschenkel F und einen geführten Zangenschenkel G, die in einem Kopfbereich 18 über ein Gleitgelenk 20 miteinander schwenkbar verbunden sind. Die Zangenschenkel F, G laufen am unteren Ende in Griffe 12 bzw. 13 aus; die oberen Enden sind als Greifbacken 14, 15 gestaltet. Der führende Zangenschenkel F hat zum Kopfbereich 18 hin eine Parallelaussparung 42, durch die der Kopfbereich des geführten Zangenschenkels G durchgesteckt ist.The gripping tongs shown in FIGS. 1 and 2 are generally designated 10. she has a leading pliers leg F and a guided pliers leg G, which in a head region 18 pivotally connected to one another via a sliding joint 20 are. The pliers legs F, G run out at the lower end in handles 12 and 13; the upper ends are designed as gripping jaws 14, 15. The leading pliers leg F has a parallel recess 42 towards the head region 18 through which the Head area of the guided pliers leg G is inserted.

Das Gleitgelenk 20 weist eine Gelenkscheibe 22 von verhältnismäßig großem Durchmesser D auf, die um eine Achse C drehbar im Kopfbereich des geführten Zangenschenkels gelagert und mit Führungsflächen 23, 24 an dem führenden Zangenschenkel F in der Parallelaussparung 42 entlangbewegbar ist. Der Durchmesser D der Gelenkscheibe ist größer als die Breite b des führenden Zangenschenkels F im Kopfbereich 18. Von der Gelenkscheibe 22 stehen die Führungsflächen 23, 24 parallel so ab, daß sie den führenden Zangenschenkel F aus der Parallelaussparung 42 heraus umgreifen und an dessen Gleitflächen 50, 54 führen.The sliding joint 20 has a joint disk 22 of relatively large size Diameter D, which is rotatable about an axis C in the head area of the guided Pliers legs stored and with guide surfaces 23, 24 on the leading Pliers leg F is movable along in the parallel recess 42. The diameter D of the joint disc is larger than the width b of the leading pliers leg F in the head region 18. The guide surfaces stand from the joint disk 22 23, 24 in parallel so that the leading pliers leg F from the Grip out parallel recess 42 and guide on its sliding surfaces 50, 54.

Die rückseitigen Gleitflächen 50 sind mit Raststufen 52 versehen, in die ein Rastbolzen 30 eingreifen kann, der in der Gelenkscheibe 22 parallel zu der Achse C gelagert ist und an seinen Enden 32 Anflachungen 34 aufweist (Fig. 3 und 6). Die Anflachungen 34 gehen am unteren Ende in einen Eckteil 35 über, dessen Form derjenigen der rückseitigen Gleitflächen 50 des führenden Zangenschenkels F gleich oder zumindest ähnlich ist.The rear sliding surfaces 50 are provided with locking steps 52 into which Locking pin 30 can engage, which in the joint plate 22 parallel to the axis C is mounted and has 32 flats 34 at its ends (FIGS. 3 and 6). The flats 34 merge into a corner part 35 at the lower end Shape of that of the back sliding surfaces 50 of the leading pliers leg F is the same or at least similar.

Einzelheiten des Aufbaues gehen aus den Fig. 3 bis 6 hervor. Man erkennt, daß die Gelenkscheibe 22 mittig eine unsymmetrische Aussparung 26 hat, um einen mit dem Rastbolzen 30 fest verbundenen Radialhebel 36 sowie eine Druckfeder 38 aufzunehmen. Diese belastet den Radialhebel 36 und damit den Rastbolzen 30, welcher in einem Lager 28 der Gelenkscheibe 22 gleitgelagert ist und nach außen einen Mitnehmer in Form eines Druckstücks 40 hat, das bei geschlossenen Zangenschenkeln F, G an einem unteren Winkelanschlag 47 zur Anlage kommt. Dieser ist an einer Flachstufe 62 als untere Begrenzung einer Ausnehmung 46 vorgesehen, die oben von einem weiteren Winkelanschlag 48 begrenzt wird. An letzterem kommt der Mitnehmer 40 zur Anlage, wenn die Zange geöffnet wird, so daß ein Anschlagkörper 56 mit einer Andruckfläche 60 das Druckstück 40 hebt (Fig. 6), wodurch gleichzeitig die Feder 38 von dem Radialhebel 36 zusammengedrückt wird. In dieser Position kann der geführte Zangenschenkel G entlang den Gleitflächen 50, 54 des führenden Zangenschenkels F auf und ab bewegt werden.Details of the structure are shown in FIGS. 3 to 6. You can see that the joint disc 22 has an asymmetrical recess 26 in the middle to one with the locking pin 30 fixed radial lever 36 and a compression spring 38 record. This loads the radial lever 36 and thus the locking pin 30, which is slidably mounted in a bearing 28 of the flexible disc 22 and after outside has a driver in the form of a pressure piece 40, which when closed Pliers legs F, G comes to rest on a lower angle stop 47. This is on a flat step 62 as the lower limit of a recess 46 provided, which is limited at the top by a further angle stop 48. On the latter, the driver 40 comes to rest when the pliers are opened, so that a stop body 56 with a pressure surface 60 lifts the pressure piece 40 (Fig. 6), whereby the spring 38 is compressed by the radial lever 36 becomes. In this position, the guided pliers leg G along the Sliding surfaces 50, 54 of the leading pliers leg F are moved up and down.

Der Anschlagkörper 56 hat ferner eine Gleitfläche 58, die dem Klemmschutz bei geschlossenen Zangenschenkeln F, G dient (Fig. 3 und 6). Sie verhindert durch Anlage an den rückseitigen Gleitflächen 50 des führenden Zangenschenkels F eine Finger-Klemmung. Diese Sicherheit ist auch wirksam, wenn die Zange bei großem Greifmaß zwischen den Greifbacken 14, 15 geschlossen wird. Die Gleitfläche 58 des Anschlagkörpers 56 ermöglicht und unterstützt ebenso wie der elastisch gelagerte Rastbolzen 30 eine Bewegung in Schließrichtung S, wozu lediglich die Kraft der Druckfeder 38 zu überwinden ist. Da die Drehachse P des Rastbolzens 30 in der Ebene liegt, welche durch die rückseitigen Gleitflächen 50 des führenden Zangenschenkels F definiert ist, führt der Rastbolzen bei dieser Aufwärtsbewegung des geführten Zangenschenkels G von Stufe zu Stufe eine kleine Schwenkung aus, bis durch Annäherung an das Greifmaß eines (nicht gezeichneten) Werkstücks die letzte dafür mögliche Raststufe 52 erreicht ist.The stop body 56 also has a sliding surface 58, which at the pinch protection closed pliers legs F, G is used (Fig. 3 and 6). You prevented by System on the rear sliding surfaces 50 of the leading pliers leg F a finger clamp. This safety is also effective when using the pliers large gripping dimension between the gripping jaws 14, 15 is closed. The sliding surface 58 of the stop body 56 enables and supports as well as the elastic stored locking bolt 30 a movement in the closing direction S, for what only the force of the compression spring 38 is to be overcome. Since the axis of rotation P of Latching pin 30 lies in the plane which is defined by the rear sliding surfaces 50 of the leading pliers leg F is defined, the locking pin leads to this Upward movement of the guided pliers leg G from level to level one small swivel until it comes close to the gripping dimension of a (not drawn) workpiece the last possible detent step 52 has been reached.

Der geführte Zangenschenkel G hat ferner in dem der Greifbacke 14 zugewandten Teil des Kopfbereichs 18 einen Sicherungsanschlag 64, welcher zur Gelenkentlastung in der voll geöffneten Zangenposition dient (Fig. 6). Dann kommt der Sicherungsanschlag 64 an der vorderen Gleitfläche 54 des führenden Zangenschenkels F zur Anlage, so daß eine weitere Spreizung nicht möglich ist.The guided pliers leg G also has the gripping jaw 14 facing Part of the head area 18 has a securing stop 64, which relieves the joint serves in the fully open pliers position (Fig. 6). Then he comes Securing stop 64 on the front sliding surface 54 of the leading pliers leg F to the system so that a further spread is not possible.

Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt. Beispielsweise kann eine an den Greifbacken 14, 15 vorgesehene Greifverzahnung 16 abweichend von den Abbildungen gestaltet sein. Auch müssen die Anschlagkörper 56, 64 nicht unbedingt die gezeichneten Formen aufweisen. Man erkennt aber, daß eine Greifzange 10 erfindungsgemäß ein durchgestecktes Gleitgelenk zur Verbindung zweier Zangenschenkel derart hat, daß sich Greifbacken 14, 15 in einstellbarem Abstand gegenüberstehen. Ein führender Zangenschenkel F nimmt in einer Parallelaussparung 44 einen geführten Zangenschenkel G gleitbeweglich auf. Eine Scheibe 22 des Gleitgelenks 20 ist in einem Kopfbereich 18 des geführten Zangenschenkels G drehbar und lagert ihrerseits einen endseitig abgesetzten Rastbolzen 30; sie ist mit Führungsflächen 23, 24 an dem führenden Zangenschenkel F in der Parallelaussparung 42 entlangbewegbar. Der Durchmesser D der Gelenkscheibe 22 ist größer als die Breite b des führenden Zangenschenkels F, der rückseitig Raststufen 52 und Gleitflächen 50 hat, an denen Anflachungen 34 halbzylindrischer Rastbolzen-Enden 32 kraftschlüssig anliegen. Der federbelastete Rastbolzen 30 ist in der Gelenkscheibe 22 exzentrisch so gelagert, daß seine Drehachse P in der durch die rückseitigen Gleitflächen 50 definierten Ebene liegt, und er hat einen zwischen Winkelanschlägen 47, 48 der Gelenkscheibe 22 begrenzt schwenkbaren, durch den geführten Zangenschenkel G erfaßbaren Mitnehmer 40, z.B. einen Radialstift. An dem Rastbolzen 30 greift über einen Radialhebel 36 in der Gelenkscheibe 22 eine Druckfeder 38 an. Der geführte Zangenschenkel G hat neben der Gelenkscheibe 22 einen Anschlagkörper 56 mit Andruckflächen 58, 60 sowie einen Sicherungsanschlag 64. The invention is not restricted to the exemplary embodiments shown. For example, a gripping toothing provided on the gripping jaws 14, 15 16 may be designed differently from the illustrations. They also have to Stop body 56, 64 do not necessarily have the shapes shown. you but recognizes that a gripping pliers 10 according to the invention a plug Sliding joint for connecting two pliers legs in such a way that gripping jaws 14, 15 face each other at an adjustable distance. A leading pliers leg F takes a guided pliers leg in a parallel recess 44 G slidably on. A disc 22 of the slide joint 20 is in one Head region 18 of the guided pliers leg G rotates and in turn supports a locking pin 30 offset at the end; it is on with guide surfaces 23, 24 along the leading pliers leg F in the parallel recess 42. The diameter D of the joint disc 22 is larger than the width b of the leading one Pliers leg F, which has locking steps 52 and sliding surfaces 50 on the back which flats 34 semi-cylindrical locking pin ends 32 non-positively issue. The spring-loaded locking pin 30 is eccentric in the flexible disk 22 so that its axis of rotation P in the through the rear sliding surfaces 50 defined plane, and it has a between angular stops 47, 48 of the joint disc 22 limited pivotable by the guided pliers legs G detectable driver 40, e.g. a radial pin. On the locking pin 30 engages a compression spring 38 via a radial lever 36 in the articulated disk 22 on. The guided pliers leg G has a stop body in addition to the joint disk 22 56 with pressure surfaces 58, 60 and a safety stop 64.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

bb
Breitewidth
CC
Drehpunkt/GelenkachsePivot / hinge axis
DD
Durchmesserdiameter
FF
führender Zangenschenkelleading pliers leg
GG
geführter Zangenschenkelguided pliers legs
PP
Bolzenachsepin axis
SS
Schließrichtungclosing direction
1010
Greifzangepliers
12,1312.13
Griffehandles
14,1514.15
Greifbackenjaws
1616
Greifverzahnunggripping teeth
1818
Kopfbereichhead area
2020
Gleitgelenkslip joint
2222
GelenkscheibeFlexible coupling
23,2423.24
Führungsflächenguide surfaces
2626
Aussparungrecess
2828
Lagercamp
3030
RastbolzenIndexing plungers
3232
Endenend up
3434
Anflachungflattening
3535
Eckteilcorner part
3636
Radialhebelradial arm
3838
Druckfedercompression spring
4040
Mitnehmer/DruckstückCarrier / pressure piece
4242
Parallelaussparungparallel recess
4646
Ausnehmungrecess
47,4847.48
Winkelanschlägeangle stops
5050
rückseitige Gleitflächenback sliding surfaces
5252
Raststufenclick stops
5454
vordere Gleitflächenfront sliding surfaces
5656
Anschlagkörperstop body
5858
(Gleit-)Fläche / Klemmschutz(Sliding) surface / pinch protection
6060
Andruckflächepressure surface
6262
Flachstufeflat stage
6464
Sicherungsanschlagsecuring stop

Claims (18)

  1. Wrench (10) having a pair of tongs (F, G) which in their lower zones run out to form a handle each and which in their upper zones (18) are each integral with an offset jaw (14; 15) that is preferably toothed, further having a slide through-joint (20) for articulating the tongs parts (F, G) such that the jaws (12, 13) face one another at a selectable distance, a leading tongs part (F) comprising a number of catch steps (52) as well as a parallel recess (42) in the region thereof for slidingly guiding a trailing tongs part (G) which is adapted to be locked at the catch steps (52) by means of a detent bolt (30) that is offset at its ends (32), wherein the slide joint (20) includes a disk (22) which is pivotably supported in the head zone (18) of the trailing tongs part (G), in turn supports the detent bolt (30) and is adapted to move within the parallel recess (42) along the leading tongs part (F), disk faces (23, 24) guiding the latter.
  2. Wrench according to claim 1, wherein the diameter (D) of the joint disk (22) exceeds the width (b) of the leading tong part (F).
  3. Wrench according to claim 1 or claim 2, wherein the joint disk (22) includes parallel guiding faces (23, 24) transverse to its plane for engaging slide faces (50, 54) of the leading tongs part (F).
  4. Wrench according to claim 3, wherein the guiding faces (23, 24) of the joint disk (22) engage the leading tongs part (F) overlappingly from out of the parallel recess (42).
  5. Wrench according to any one of claims 1 to 4, wherein the leading tongs part (F) comprises at either side of the parallel recess (42) rear slide faces (50) having aligned catch steps (52) which are non-positively engaged by flat faces (34) of ends (32) of the detent bolt (30).
  6. Wrench according to any one of claims 1 to 5, wherein the detent bolt (30) is adapted to lock at the catch steps (52) in a selectable position by opening the tongs handles (12, 13), moving the trailing tongs part (G) oppositely to the closing direction (S) of the jaws (14, 15) and closing the tongs handles (12, 13).
  7. Wrench according to at least one of claims 1 to 5, wherein the trailing tongs part (G) is movable in the closing direction (S) along the slide faces (50) and their catch steps (52), in contact with a stop (56) and without slewing the tongs handles (12, 13).
  8. Wrench according to any one of claims 1 to 7, wherein the ends (32) of the detent bolt (30) form longitudinally divided semi-cylinders.
  9. Wrench according to any one of claims 1 to 8, wherein the detent bolt (30) is eccentrically supported in the joint disk (22).
  10. Wrench at least according to claims 3 and 9, wherein the pivot axis (P) of the detent bolt (30) coincides with a plane defined by the rear slide faces (50) of the leading tongs part (F).
  11. Wrench according to any one of claims 1 to 10, wherein the detent bolt (30) is spring-biassed and comprises a dog (40) which is pivotably confined between angular stops (47, 48) of the joint disk (22) and which is engageable by the trailing tongs part (G).
  12. Wrench according to claim 11, wherein a spring (38) held at or in the joint disk (22) is arranged to load the detent bolt (30) in a direction of engagement of the dog (40) at a lower angular stop face (47) of the joint disk (22).
  13. Wrench according to claim 11 or claim 12, wherein the detent bolt (30) is engaged by a compression spring (38), preferably via a radial lever (36) that is, together with the spring, arranged in a recess (26) of the joint disk (22).
  14. Wrench according to any one of claims 11 to 13, wherein the dog (40) is e.g. pin-shaped and is radially fixed to the detent bolt (30), and wherein two angular stops are formed by faces (47, 48) that confine a relief (46) at a flat step (62) of the joint disk (22).
  15. Wrench according to any one of claims 5 to 15, wherein the flat end faces (34) of the detent bolt (30) run out to form lower corner portions (35) whose shape is similar to or identical with the rear slide faces (50) of the leading tongs part (F).
  16. Wrench according to any one of claims 11 to 15, wherein the trailing tongs part (G) includes, adjacent to the joint disk (22), a stop (56) having in association to the dog (40) a lug, a thrust face (60) or the like.
  17. Wrench according to claim 16, wherein the stop (56) comprises a face (58) for engaging, in the closed position of the tongs handles (12, 13), the rear slide faces (50) of the leading tongs part (F).
  18. Wrench according to any one of claims 1 to 17, wherein the trailing tongs part (G) includes a security stop (64) for relieving the joint (20) as the tongs are opened, said security stop (64) being in particular at the side of the lower jaw (14) and opposite to a stop (56).
EP98103075A 1997-02-28 1998-02-21 Wrench Expired - Lifetime EP0861707B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29703681U 1997-02-28
DE29703681U DE29703681U1 (en) 1997-02-28 1997-02-28 pliers

Publications (3)

Publication Number Publication Date
EP0861707A2 EP0861707A2 (en) 1998-09-02
EP0861707A3 EP0861707A3 (en) 1999-07-14
EP0861707B1 true EP0861707B1 (en) 2002-05-15

Family

ID=8036758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98103075A Expired - Lifetime EP0861707B1 (en) 1997-02-28 1998-02-21 Wrench

Country Status (3)

Country Link
EP (1) EP0861707B1 (en)
AT (1) ATE217562T1 (en)
DE (2) DE29703681U1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD910395S1 (en) 2019-03-11 2021-02-16 Milwaukee Electric Tool Corporation Pliers
US11247308B2 (en) 2017-09-11 2022-02-15 Milwaukee Electric Tool Corporation Locking pliers with movable torque-increasing jaw section
US11541514B2 (en) 2016-03-23 2023-01-03 Milwaukee Electric Tool Corporation Locking pliers

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES1043181Y (en) * 1999-05-03 2000-04-01 Super Ego Tools PERFECT ADJUSTABLE CLAMP.
DE202013101985U1 (en) * 2013-05-07 2013-05-17 Hazet-Werk Hermann Zerver Gmbh & Co. Kg tongs

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191000144A (en) * 1910-01-03 1910-11-17 Wilhelm Kessing An Improved Pipe Wrench or Spanner.
FR2052020A5 (en) * 1969-07-11 1971-04-09 Stephanoises Forges
DE3303368A1 (en) * 1983-02-02 1984-08-02 Knipex-Werk C. Gustav Putsch, 5600 Wuppertal Waterpump pliers
DE9003285U1 (en) * 1990-03-21 1990-06-21 Gedore-Werkzeugfabrik Otto Dowidat, 5630 Remscheid Water pump pliers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11541514B2 (en) 2016-03-23 2023-01-03 Milwaukee Electric Tool Corporation Locking pliers
US11247308B2 (en) 2017-09-11 2022-02-15 Milwaukee Electric Tool Corporation Locking pliers with movable torque-increasing jaw section
US11850707B2 (en) 2017-09-11 2023-12-26 Milwaukee Electric Tool Corporation Locking pliers with movable torque-increasing jaw section
USD910395S1 (en) 2019-03-11 2021-02-16 Milwaukee Electric Tool Corporation Pliers
USD951731S1 (en) 2019-03-11 2022-05-17 Milwaukee Electric Tool Corporation Pliers

Also Published As

Publication number Publication date
ATE217562T1 (en) 2002-06-15
EP0861707A2 (en) 1998-09-02
DE59804109D1 (en) 2002-06-20
EP0861707A3 (en) 1999-07-14
DE29703681U1 (en) 1997-06-19

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