EP2144333B1 - Bypass and earthing device with grip clamp and cable connecting element - Google Patents

Bypass and earthing device with grip clamp and cable connecting element Download PDF

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Publication number
EP2144333B1
EP2144333B1 EP08012291.4A EP08012291A EP2144333B1 EP 2144333 B1 EP2144333 B1 EP 2144333B1 EP 08012291 A EP08012291 A EP 08012291A EP 2144333 B1 EP2144333 B1 EP 2144333B1
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EP
European Patent Office
Prior art keywords
jaws
actuating
screw
bracket
clip terminal
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EP08012291.4A
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German (de)
French (fr)
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EP2144333A1 (en
Inventor
Klaus Mutschlechner
Arnold Reichegger
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/26—End pieces terminating in a screw clamp, screw or nut
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/308—Conductive members located parallel to axis of screw
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/22—End pieces terminating in a spring clip
    • H01R11/24—End pieces terminating in a spring clip with gripping jaws, e.g. crocodile clip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail

Definitions

  • this clamp is similar to a carpenter clamp constructed and consists of a bracket at one end a screw in the direction of the second end of the same bracket is screwed.
  • the contact surfaces of this terminal remain parallel to each other when adjusting the screw.
  • This contact terminal is by itself bulky due to the ferrule and the rotatable screw spindle and requires for the operation of the screw a considerable amount of space.
  • the invention has the object to provide a tapping clamp of the type mentioned above, in particular a terminal for a Kurzschschhoff- and grounding device which is handy and to different
  • Types of terminal strips irrespective of the possibly intended Sich mecanicsart, attachable, which requires no adjustment elements for the contact elements, which allows grounding without the use of specific connection or contact elements, which provides the technician the maximum security during the attachment of the short-circuiting device and which is suitable to avoid the risk of direct contact with the live parts.
  • the invention has the object to provide a crocodile clip which effective contact with metallic elements of very different shape, such as screw heads, terminal strips, plaques on terminal strips, grounding cables, sheets or other metal parts of lighting masts or to fuse boxes which are grounded and Terminal strips, with or without fuses, included.
  • the invention proposes a tapping clamp according to claim 1.
  • the invention proposes the provision of a clamp with two jaws in front of which at least one is moved with the contact surface parallel to the contact surface of the second jaw.
  • this alligator clip can always be easily removed from the rear by means of an insulated tool for working under tension, such as e.g. an Allen key or a screwdriver.
  • the alligator clip according to the invention essentially consists of a stirrup body which in the region of the axis has a seat with bearing surface for the head of an actuating screw which is screwed into a threaded bore of an actuating stirrup which is inserted between the arms of the stirrup body.
  • This actuating bracket has at the ends of two inclined planes which are inclined to the threaded bore and correspond to the inclined planes which are provided on the two on a guide pin between the ends of the arms of the hanger body, mutually displaceably mounted in a parallel position, jaws.
  • the operating handle will act on the movable jaw with only one of the inclined planes;
  • the actuating bow is replaced by one or two pivotally mounted on the bracket body, driven by a screw, elements which act on a surface of the jaws so that the mutual displacement is achieved.
  • this screw can right-handed thread, a bearing surface which is provided at the bottom of the seat on the bracket body for the screw head corresponds to the annular surface at the base of this head.
  • the inclined planes on the actuating bow can be replaced by inclined grooves or guide slots in which projecting from the jaws pin or projections slide.
  • the actuating screw is fixed to the hanger body so that axial displacements are prevented and by operating the said screw, the closing and also the opening movement of the jaws is achieved.
  • the relatively wide movement of the jaws allows the clamping of the jaws on elements of the terminal block which have different shape and dimensions as well as to metallic elements which are provided with grounding or directly to cables or grounding terminals. Furthermore, the adjustment of the jaws while maintaining the mutually parallel position ensures effective tapping and large contact surfaces.
  • this contact socket is voteilhaftble protected by one of the insulating shell of the terminal projecting tubular approach.
  • connection cables which are interconnected to form a short-circuiting and earthing device according to the invention, is fastened in a simple manner, in the manner of a clamp, in a dedicated bore on the bracket body of the alligator clip.
  • the entire terminal is covered by a shell of electrically insulating material, wherein for the access to the actuating screw and the screw for the attachment of the connection cable tubular projections are provided to prevent direct contact with these screws.
  • the jaws of the terminals are advantageously covered by a plastic shell with only the contact surface of the jaws are not covered.
  • the inclined surfaces on the operating bracket or on the pivotable actuators can by oblique guide grooves or Guide slots are replaced in which, from the jaws protruding, pins or projections slide.
  • the fact that the actuating screw of the clamp according to the invention can be actuated from the rear is this, even in the case of a close arrangement of the terminals or the contact elements, possibly between projecting insulating bars on the terminal strip, easily attachable.
  • the tapping clamp can not be used for purposes which do not provide for shorting such as e.g. be used for the creation of electrical bypasses or by-pass, for.sabgreifung, electrical measurements and the like.
  • the Fig. 1 shows a perspective view of an alligator clip according to the invention a Kurzsch wider- and grounding device which on a terminal block with Fuse, within a metallic lighting mast, is attached; Grounding is done via one of the alligator clips directly on the wall of the metallic grounded mast.
  • the Fig. 2 shows a perspective view of a terminal block with two fuses and placed between insulating bars terminals.
  • the Fig. 3 shows a perspective view of a terminal block with fuse and terminals between which no insulating bars are provided.
  • the Fig. 4 shows a perspective view of an alligator clip according to the invention which at a terminal of a terminal block, of the in Fig. 2 shown, is appropriate.
  • the Fig. 5 shows a perspective view of an alligator clip according to the invention which at a terminal of a terminal block, of the in Fig. 3 shown, is appropriate.
  • the Fig. 6 shows a perspective view of an alligator clip according to the invention which is attached to the wall of a metallic grounded lighting mast.
  • La Fig. 7 shows, partially in section, an alligator clip according to the invention.
  • the alligator clip 3 essentially consists of a metallic hanger body 3d, an actuating yoke 3g and two jaws 3a which are displaceable on a guide pin 3e held between the two arms of the hanger body.
  • the actuating bow 3g has in the region of the axis of symmetry of the bracket a threaded hole for a screw 3h with left-handed thread on which is inserted with her head in a seat which has a through hole and is provided coaxially to the axis of symmetry on the hanger body 3d.
  • This seat has a support surface 3n for the head of the screw.
  • the actuating bow 3g has two, inclined to the axis of the threaded bore for the screw 3h, inclined planes 3i, these inclined planes 3i act on the inclined planes 3j which are provided on the back of the jaws 3a, which by a on the Guide pin 3e deferred compression spring 3f are pressed into the position of the maximum opening of the terminal.
  • the alligator clip is externally covered by an insulating 3k which in the region of the axis of the actuating screw 3h and the fastening screw 3m tubular projections 3b and 3c for the introduction of a Allen wrench or screwdriver, without the risk of direct contact with the metallic parts having. Both jaws may possibly be covered by a shell of insulating material so that only the contact surface remains free.
  • V presses the actuating yoke 3g in the direction of the guide pin because of the left-handed thread and because it rests with its head on the surface 3n in the seat on the hanger body 3d 3e.
  • This movement V of the moving bar 3g causes, due to the action of the corresponding inclined planes 3i, 3j, the mutual approach S of the two jaws 3a along the guide pin 3e and thus the parallel closing movement.
  • the opening movement of the jaws 3 a is carried out by actuation of the screw 3 h to the left, whereby the actuating bow 3 g, by the action of the compression spring 3 f which pushes both jaws 3 a in the maximum open position, is pushed back.
  • the opening and closing movements S of the jaws 3a these are always guided by the guide pin 3e and move parallel to one another, whereby a suitable frictional connection and an effective contact surface are always ensured.
  • the alligator clip 3 as well as the insulated cable connector 5 can also be used for purposes other than short circuit and grounding, e.g. As for the manufacture of electrical bridges, connections and / or bypass, for electrical voltage drops, measurements and the like.

Description

Es sind Kurzschließ- und Erdungsvorrichtungen, insbesondere für Klemmleisten mit Schmelzsicherungen für Beleuchtungsmasten oder für Klemmleisten in Verteilerdosen, bekannt. Diese Vorrichtungen bestehen generell

  • aus einer Serie, von unter sich jeweils an einem Ende verbundenen, Kabeln welche an jedem der zweiten Kabelenden mit einem, an Stelle der Schmelzsicherung einschraubbarem, Kontaktelement versehen sind,
  • aus Anpassungselemente für die besagten Kontaktelemente so dass der Anschluss an unterschiedlich große Sicherungsfassungen sichergestellt ist,
  • und aus einer Kontaktvorrichtung für die Erdung. Diese bekannten Vorrichtungen weisen verschiedene Nachteile auf:
  • weil sie aus mehreren Kabeln bestehen welche an einem der jeweiligen Enden verbunden sind und deren Handhabung unbequem ist und Verwirrung der Kabel verursacht,
  • um die Vorrichtung auch für Fassungen von Sicherungen mit unterschiedlichem Durchmesser verwenden zu können muss ein Set von Anpassungsbuchsen mitgeliefert werden,
  • die einschraubbaren Kontaktelemente sind nicht gegen ungewollte Kontakte über die nicht eingesetzten Kontaktelemente gesichert,
  • es ist eine Kurzschließung oder ein Anschluss nur jener Fasen möglich welche mit Sicherung versehen sind, nicht jener Fasen welche nur durch die Klemmleiste durchgeführt sind,
  • die Kontaktelemente haben einen platzraubenden Aufbau.
Short-circuiting and earthing devices, in particular for terminal strips with fuses for lighting masts or for terminal strips in distribution boxes, are known. These devices generally exist
  • from a series of cables, each connected at one end, which are provided at each of the second cable ends with a, in place of the fuse screwed, contact element,
  • from adaptation elements for the said contact elements, so that the connection to differently sized fuse holders is ensured,
  • and a contactor for grounding. These known devices have various disadvantages:
  • because they consist of several cables which are connected at one of the respective ends and whose handling is inconvenient and causes confusion of the cables,
  • in order to be able to use the device also for sockets of fuses with different diameters, a set of adapter sockets must be supplied,
  • the screw-in contact elements are not secured against unwanted contacts on the unused contact elements,
  • it is a short-circuit or a connection only those chamfers are possible which are provided with security, not those chamfers which are performed only by the terminal block,
  • the contact elements have a space-consuming construction.

Aus der US 5,030,106 ist eine Klemme für den Anschluss eines Kabelendes an den Polkontaktstift einer Speicherbatterie bekannt. Die Kontaktflächen dieser Klemme sind über einen Schneckenrad- und Zahnstangenmechanismus zueinander parallel verstellbar um am Polstift angesetzt und festgeklemmt werden zu können.From the US 5,030,106 is a terminal for connecting a cable end to the Polkontaktstift a storage battery known. The contact surfaces of this terminal are parallel to each other via a worm gear and rack mechanism adjustable to be applied and clamped on the pole pin.

Aus der US 4,778,413 ist eine Kontaktklemme für ein Elektroschweißgerät bekannt, diese Klemme ist ähnlich wie eine Tischlerzwinge aufgebaut und besteht aus einem Bügel an dessen einem Ende eine Schraubenspindel in Richtung des zweiten Endes des selben Bügels einschraubbar ist. Die Kontaktflächen dieser Klemme bleiben beim Verstellen der Schraubenspindel zueinander parallel. Diese Kontaktklemme ist durch den Zwingenbügel und der verdrehbaren Schraubenspindel von sich aus sperrig und erfordert für die Betätigung der Schraubenspindel einen beachtlichen Freiraum.From the US 4,778,413 is a contact terminal for an electric welder known, this clamp is similar to a carpenter clamp constructed and consists of a bracket at one end a screw in the direction of the second end of the same bracket is screwed. The contact surfaces of this terminal remain parallel to each other when adjusting the screw. This contact terminal is by itself bulky due to the ferrule and the rotatable screw spindle and requires for the operation of the screw a considerable amount of space.

Die Erfindung stellt sich die Aufgabe eine Abgreifklemme der eingangs genannten Art, insbesondere eine Klemme für eine Kurzschließ- und Erdungsvorrichtung zu schaffen welche handlich ist und an verschiedeneThe invention has the object to provide a tapping clamp of the type mentioned above, in particular a terminal for a Kurzschließ- and grounding device which is handy and to different

Arten von Klemmleisten, unabhängig von der eventuell vorgesehnen Sicherungsart, anbringbar ist, welche keine Anpassungselemente für die Kontaktelemente benötigt, welche eine Erdung ohne Einsatz spezifischer Anschluss- oder Kontaktelemente ermöglicht, welche während der Anbringung der Kurzschließvorrichtung dem Techniker die maximale Sicherheit bietet und welche geeignet ist das Risiko direkter Kontakte mit den unter Spannung stehenden Teilen zu verhindern.Types of terminal strips, irrespective of the possibly intended Sicherungsart, attachable, which requires no adjustment elements for the contact elements, which allows grounding without the use of specific connection or contact elements, which provides the technician the maximum security during the attachment of the short-circuiting device and which is suitable to avoid the risk of direct contact with the live parts.

Weiters stellt sich die Erfindung die Aufgabe eine Abgreifklemme zu schaffen welche einen wirkungsvollen Kontakt an metallischen Elementen sehr unterschiedlicher Ausformung, wie an Schraubenköpfen, an Klemmleisten, Plaketten an Klemmleisten, Erdungskabel, Blechen oder an anderen metallischen Teilen an Beleuchtungsmasten oder an Sicherungskästen welche geerdet sind und Klemmleisten, mit oder ohne Sicherungen, enthalten, herstellt.Furthermore, the invention has the object to provide a crocodile clip which effective contact with metallic elements of very different shape, such as screw heads, terminal strips, plaques on terminal strips, grounding cables, sheets or other metal parts of lighting masts or to fuse boxes which are grounded and Terminal strips, with or without fuses, included.

Zur lösung dieser Aufgabe schlägt die erfindung eine Abgreifklemme nach Anspruch 1.To solve this problem, the invention proposes a tapping clamp according to claim 1.

Dadurch dass für jede kurzzuschließende Fase, bzw. auch für die Erdung, einzelne Kabel vorgesehen sind, sind diese bequem anbringbar und verbindbar ohne Verwirrung zu schaffen was auch dadurch verhindert wird dass, zwecks Schaffung des Kontaktes, keine Drehbewegungen erforderlich sind. Sei es die Abgreifklemmen als auch das Verbindungselement sind durch eine Schale isoliert so dass jeglicher ungewollter Kontakt mit metallischen, unter Spannung stehenden, Teilen der Vorrichtung ausgeschlossen ist.The fact that individual short cables are provided for each short-circuiting, or for the grounding, these are easily attachable and connectable without confusion to create what is also prevented by that, in order to create the contact, no rotational movements are required. Be it the alligator clips as well as the connecting element are insulated by a shell so that any unwanted contact with metallic, live, parts of the device is excluded.

Um über eine Abgreifklemme zu verfügen welche an, eventuell unter Spannung stehende Elemente, bzw. an Erdungselemente, deren Form und Abmessungen sehr unterschiedlich sind und welche eventuell in engen Abständen vorgesehen sind, anbringbar ist, wobei immer eine wirkungsvolle Verbindung gesichert wird, schlägt die Erfindung die Schaffung einer Klemme mit zwei Backen vor von denen mindestens eine mit der Kontaktfläche parallel zur Kontaktfläche der zweiten Backe bewegt wird. Eventuell sind auch diese Backen, mit Ausnahme der Kontaktflächen, von einer isolierenden Schale abgedeckt. Diese Abgreifklemme kann weiters erfindungsgemäß immer bequem von der Rückseite her mittels eines isolierten Werkzeuges für Arbeiten unter Spannung, wie z.B. einem Inbusschlüssel oder einem Schraubendreher, betätigt werden.In order to have an alligator clip which is attached to, possibly live elements, or to grounding elements whose shape and dimensions are very different and which are possibly provided at close intervals, attachable, always with an effective connection is secured, the invention proposes the provision of a clamp with two jaws in front of which at least one is moved with the contact surface parallel to the contact surface of the second jaw. Maybe these jaws, with the exception of the contact surfaces, covered by an insulating shell. According to the invention, this alligator clip can always be easily removed from the rear by means of an insulated tool for working under tension, such as e.g. an Allen key or a screwdriver.

Die erfindungsgemäße Abgreifklemme besteht wesentlich aus einem Bügelkörper welcher im Bereich der Achse einen Sitz mit Auflagefläche für den Kopf einer Betätigungsschraube aufweist welche in eine Gewindebohrung eines Betätigungsbügels eingeschraubt ist welcher zwischen den Armen des Bügelkörpers eingesetzt ist. Dieser Betätigungsbügel weist an den Enden zwei schiefe Ebenen auf welche zur Gewindebohrung hin geneigt sind und den schiefen Ebenen entsprechen welche an den beiden an einem Führungsbolzen zwischen den Enden der Arme des Bügelkörpers, zueinander in paralleler Stellung verschiebbar gelagerten, Backen vorgesehen sind. In diesem Fall wird der Betätigungsbügel mit nur einer der schiefen Ebenen auf die bewegliche Backe wirken; es ist weiters denkbar, dass der Betätigungsbügel von einem oder von zwei am Bügelkörper schwenkbar gelagerten, über eine Schraube angetriebene, Elemente ersetzt wird wobei diese auf eine Fläche der Backen so wirken dass das gegenseitige Verschieben erreicht wird. In diesem Fall, bei Schwenkachsen der Betätigungselemente in einer Position zwischen der Betätigungsschraube und der schiefen oder gebogenen Ebene (z.B. spiralenförmig oder schraubenlinienförmig) welche auf die entsprechende Backe wirkt, kann diese Schraube ein rechtsläufiges Gewinde aufweisen, eine Auflagefläche welche am Grund des Sitzes am Bügelkörper für den Schraubenkopf vorgesehen ist, entspricht der Ringfläche an der Basis dieses Kopfes. Die schiefen Ebenen am Betätigungsbügel können von schiefen Rillen oder Führungsschlitzen ersetzt werden in welchen von den Backen vorstehende Zapfen oder Vorsprünge gleiten. In diesem Fall ist die Betätigungsschraube am Bügelkörper festgelegt so dass axiale Verschiebungen verhindert werden und durch Betätigung der besagten Schraube die Schließ- und auch die Öffnungsbewegung der Backen erreicht wird. Die relativ weite Bewegung der Backen ermöglicht das Festklemmen der Backen an Elementen der Klemmleiste welche unterschiedliche Form und Abmessungen aufweisen sowie auch an metallischen Elementen welche mit Erdung versehen sind oder auch direkt an Kabeln oder Erdungsklemmen. Weiters sichert das Verstellen der Backen unter Beibehaltung der gegenseitig parallelen Position ein wirkungsvolles Abgreifen und große Kontaktflächen. Vorzugsweise kann am Rücken der Abgreifklemme eine Kontaktbuchse für die Anbringung von Steckern, z.B. zwecks Durchführung elektrischer Messungen, vorgesehen sein, diese Kontaktbuchse ist voteilhafterweise durch einen von der Isolierschale der Klemme vorstehenden rohrförmigen Ansatz geschützt.The alligator clip according to the invention essentially consists of a stirrup body which in the region of the axis has a seat with bearing surface for the head of an actuating screw which is screwed into a threaded bore of an actuating stirrup which is inserted between the arms of the stirrup body. This actuating bracket has at the ends of two inclined planes which are inclined to the threaded bore and correspond to the inclined planes which are provided on the two on a guide pin between the ends of the arms of the hanger body, mutually displaceably mounted in a parallel position, jaws. In this case, the operating handle will act on the movable jaw with only one of the inclined planes; It is further conceivable that the actuating bow is replaced by one or two pivotally mounted on the bracket body, driven by a screw, elements which act on a surface of the jaws so that the mutual displacement is achieved. In this case, with pivot axes of the actuators in a position between the actuating screw and the inclined or curved plane (eg helical or helical) which acts on the corresponding jaw, this screw can right-handed thread, a bearing surface which is provided at the bottom of the seat on the bracket body for the screw head corresponds to the annular surface at the base of this head. The inclined planes on the actuating bow can be replaced by inclined grooves or guide slots in which projecting from the jaws pin or projections slide. In this case, the actuating screw is fixed to the hanger body so that axial displacements are prevented and by operating the said screw, the closing and also the opening movement of the jaws is achieved. The relatively wide movement of the jaws allows the clamping of the jaws on elements of the terminal block which have different shape and dimensions as well as to metallic elements which are provided with grounding or directly to cables or grounding terminals. Furthermore, the adjustment of the jaws while maintaining the mutually parallel position ensures effective tapping and large contact surfaces. Preferably, at the back of the alligator clip, a contact socket for the attachment of plugs, eg for the purpose of carrying out electrical measurements, be provided, this contact socket is voteilhafterweise protected by one of the insulating shell of the terminal projecting tubular approach.

Eines der Enden an jedem der Verbindungskabel, welche unter sich verbunden sind um eine erfindungsgemäße Kurzschließ- und Erdungsvorrichtung zu bilden, ist auf einfache Weise, nach Art einer Klemme, in einer eigenen dafür vorgesehenen Bohrung am Bügelkörper der Abgreifklemme befestigt. Erfindungsgemäß ist die gesamte Klemme durch eine Schale aus elektrisch isolierendem Werkstoff abgedeckt, wobei für den Zugang zur Betätigungsschraube und zur Schraube für die Befestigung des Verbindungskabels rohrartige Ansätze vorgesehen sind um den direkten Kontakt mit diesen Schrauben zu verhindern. Auch die Backen der Klemmen sind vorteilhafterweise von einer Kunststoffschale abgedeckt wobei nur die Kontaktfläche der Backen nicht abgedeckt sind. Die schiefen Flächen am Betätigungsbügel oder an den schwenkbaren Betätigungselementen können durch schräge Führungsrillen oder Führungsschlitze ersetzt werden in welchen, von den Backen vorstehende, Zapfen oder Vorsprünge gleiten.
Dadurch dass die Betätigungsschraube der erfindungsgemäßen Klemme von der Rückseite her betätigt werden kann ist diese, auch im Falle einer engen Anordnung der Klemmen oder der Kontaktelemente eventuell zwischen vorspringenden Isolierstegen an der Klemmleiste, bequem anbringbar.One of the ends on each of the connection cables, which are interconnected to form a short-circuiting and earthing device according to the invention, is fastened in a simple manner, in the manner of a clamp, in a dedicated bore on the bracket body of the alligator clip. According to the invention the entire terminal is covered by a shell of electrically insulating material, wherein for the access to the actuating screw and the screw for the attachment of the connection cable tubular projections are provided to prevent direct contact with these screws. The jaws of the terminals are advantageously covered by a plastic shell with only the contact surface of the jaws are not covered. The inclined surfaces on the operating bracket or on the pivotable actuators can by oblique guide grooves or Guide slots are replaced in which, from the jaws protruding, pins or projections slide.
The fact that the actuating screw of the clamp according to the invention can be actuated from the rear is this, even in the case of a close arrangement of the terminals or the contact elements, possibly between projecting insulating bars on the terminal strip, easily attachable.

Erfindungsgemäß kann die Abgreifklemme für Zwecke welche nicht die Kurzschließung vorsehen, wie z.B. für das Erstellen von elektrischen Überbrückungen oder Bypasse, für Spannungsabgreifung, elektrische Messungen und dergleichen verwendet werden.According to the invention, the tapping clamp can not be used for purposes which do not provide for shorting such as e.g. be used for the creation of electrical bypasses or by-pass, for Spannungsabgreifung, electrical measurements and the like.

Die Erfindung wird anschließend anhand eines in den beigelegten Zeichnungen schematisch dargestellten Ausführungsbeispieles einer Abgreifklemme für Kurzschließ- und Erdungsvorrichtung samt Verbindungskabel und einem Kabel-Verbindungselement näher erklärt, dabei erfüllen die Zeichnungen rein erklärenden, nicht beschränkenden Zweck.The invention will be explained in more detail with reference to an embodiment schematically illustrated in the accompanying drawings of a tapping clamp for Kurzschließ- and grounding device including connection cable and a cable connection element, the drawings meet purely explanatory, non-limiting purpose.

Die Fig. 1 zeigt in perspektivischer Darstellung eine erfindungsgemäße Abgreifklemme einer Kurzschließ- und Erdungsvorrichtung welche an einer Klemmleiste mit Schmelzsicherung, innerhalb eines metallischen Beleuchtungsmastes, angebracht ist ; die Erdung erfolgt über eine der Abgreifklemmen direkt an der Wand des metallischen geerdeten Mastes.The Fig. 1 shows a perspective view of an alligator clip according to the invention a Kurzschließ- and grounding device which on a terminal block with Fuse, within a metallic lighting mast, is attached; Grounding is done via one of the alligator clips directly on the wall of the metallic grounded mast.

Die Fig. 2 zeigt in perspektivischer Darstellung eine Klemmleiste mit zwei Schmelzsicherungen und zwischen Isolierstege platzierte Klemmen.The Fig. 2 shows a perspective view of a terminal block with two fuses and placed between insulating bars terminals.

Die Fig. 3 zeigt in perspektivischer Darstellung eine Klemmleiste mit Schmelzsicherung und Klemmen zwischen welchen keine Isolierstege vorgesehen sind.The Fig. 3 shows a perspective view of a terminal block with fuse and terminals between which no insulating bars are provided.

Die Fig. 4 zeigt in perspektivischer Darstellung eine erfindungsgemäße Abgreifklemme welche an einer Klemme einer Klemmleiste, von der in Fig. 2 dargestellten Art, angebracht ist.The Fig. 4 shows a perspective view of an alligator clip according to the invention which at a terminal of a terminal block, of the in Fig. 2 shown, is appropriate.

Die Fig. 5 zeigt in perspektivischer Darstellung eine erfindungsgemäße Abgreifklemme welche an einer Klemme einer Klemmleiste, von der in Fig. 3 dargestellten Art, angebracht ist.The Fig. 5 shows a perspective view of an alligator clip according to the invention which at a terminal of a terminal block, of the in Fig. 3 shown, is appropriate.

Die Fig. 6 zeigt in perspektivischer Darstellung eine erfindungsgemäße Abgreifklemme welche an der Wand eines metallischen geerdeten Beleuchtungsmastes angebracht ist.The Fig. 6 shows a perspective view of an alligator clip according to the invention which is attached to the wall of a metallic grounded lighting mast.

La Fig. 7 zeigt, teilweise in Schnittdarstellung eine erfindungsgemäße Abgreifklemme.La Fig. 7 shows, partially in section, an alligator clip according to the invention.

Die erfindungsgemäße Abgreifklemme 3 besteht wesentlich aus einem metallischen Bügelkörper 3d, aus einem Betätigungsbügel 3g und aus zwei Backen 3a welche an einem, zwischen den beiden Armen des Bügelkörpers gehaltenen, Führungsbolzen 3e verschiebbar S sind. Der Betätigungsbügel 3g weist im Bereich der Symmetrieachse des Bügels eine Gewindebohrung für eine Schraube 3h mit linksgängigem Gewinde auf welche mit ihrem Kopf in einen Sitz eingesetzt ist welcher eine durchgehende Bohrung aufweist und koaxial zur Symmetrieachse am Bügelkörper 3d vorgesehen ist. Dieser Sitz weist eine Auflagefläche 3n für den Kopf der Schraube auf. Der Betätigungsbügel 3g weist zwei, zur Achse der Gewindebohrung für die Schraube 3h geneigte, schiefe Ebenen 3i auf, diese schiefen Ebenen 3i wirken auf die schiefen Ebenen 3j welche rückseitig an den Backen 3a vorgesehen sind, welche durch eine auf den Führungsbolzen 3e aufgeschobene Druckfeder 3f in die Stellung der maximalen Öffnung der Klemme gedrückt werden. Die Abgreifklemme ist außen durch eine Isolierschale 3k abgedeckt welche im Bereich der Achse der Betätigungsschraube 3h und der Befestigungsschraube 3m rohrförmige Ansätze 3b und 3c für die Einführung eines Inbusschlüssels oder Schraubendrehers, ohne Gefahr eines direkten Kontaktes mit den metallischen Teilen, aufweist. Beide Backen können eventuell durch eine Schale aus isolierendem Werkstoff so verkleidet sein, dass nur die Kontaktfläche frei bleibt. Durch Drehen der Schraube 3h nach rechts mittels eines Schlüssels welcher durch den rohrförmigen Ansatz 3b eingeführt wird, drückt V diese, wegen des linksgängigen Gewindes und weil diese mit dem Kopf auf der Fläche 3n im Sitz am Bügelkörper 3d aufliegt, den Betätigungsbügel 3g in Richtung Führungsbolzen 3e. Diese Bewegung V des Bewegungsbügels 3g verursacht, durch Wirkung der entsprechenden schiefen Ebenen 3i, 3j, die gegenseitige Annäherung S der beiden Backen 3a längs des Führungsbolzens 3e und somit die parallele Schließbewegung. Die Öffnungsbewegung der Backen 3a erfolgt durch Betätigung der Schraube 3h nach links wodurch der Betätigungsbügel 3g, durch Wirkung der Druckfeder 3f welche beide Backen 3a in die maximale Öffnungsstellung drückt, zurückgeschoben wird.
Während der Öffnungs- und Schließbewegungen S der Backen 3a sind diese immer vom Führungsbolzen 3e geführt und bewegen sich zueinander parallel wodurch immer ein geeigneter Kraftschluss und eine wirkungsvolle Kontaktfläche gesichert wird.The alligator clip 3 according to the invention essentially consists of a metallic hanger body 3d, an actuating yoke 3g and two jaws 3a which are displaceable on a guide pin 3e held between the two arms of the hanger body. The actuating bow 3g has in the region of the axis of symmetry of the bracket a threaded hole for a screw 3h with left-handed thread on which is inserted with her head in a seat which has a through hole and is provided coaxially to the axis of symmetry on the hanger body 3d. This seat has a support surface 3n for the head of the screw. The actuating bow 3g has two, inclined to the axis of the threaded bore for the screw 3h, inclined planes 3i, these inclined planes 3i act on the inclined planes 3j which are provided on the back of the jaws 3a, which by a on the Guide pin 3e deferred compression spring 3f are pressed into the position of the maximum opening of the terminal. The alligator clip is externally covered by an insulating 3k which in the region of the axis of the actuating screw 3h and the fastening screw 3m tubular projections 3b and 3c for the introduction of a Allen wrench or screwdriver, without the risk of direct contact with the metallic parts having. Both jaws may possibly be covered by a shell of insulating material so that only the contact surface remains free. By turning the screw 3h to the right by means of a key which is inserted through the tubular projection 3b, V presses the actuating yoke 3g in the direction of the guide pin because of the left-handed thread and because it rests with its head on the surface 3n in the seat on the hanger body 3d 3e. This movement V of the moving bar 3g causes, due to the action of the corresponding inclined planes 3i, 3j, the mutual approach S of the two jaws 3a along the guide pin 3e and thus the parallel closing movement. The opening movement of the jaws 3 a is carried out by actuation of the screw 3 h to the left, whereby the actuating bow 3 g, by the action of the compression spring 3 f which pushes both jaws 3 a in the maximum open position, is pushed back.
During the opening and closing movements S of the jaws 3a, these are always guided by the guide pin 3e and move parallel to one another, whereby a suitable frictional connection and an effective contact surface are always ensured.

Sei es die Abgreifklemme 3 als auch das isolierte Kabel-Verbindungselement 5 können auch für andere Zwecke als für Kurzschließung und Erdung verwendet werden, z. B. zur Herstellung elektrischer Brücken, Verbindungen und/oder Bypasse, für elektrische Spannungsabnahmen, Messungen und dergleichen.Be it the alligator clip 3 as well as the insulated cable connector 5 can also be used for purposes other than short circuit and grounding, e.g. As for the manufacture of electrical bridges, connections and / or bypass, for electrical voltage drops, measurements and the like.

Claims (7)

  1. A clip terminal, in particular for a bypass and earthing device, which clip terminal can be attached to metal contact elements such as to elements on terminal strips, to terminals and earthing cables or directly to metal elements such as masts, protective boxes and the like, the clip terminal consisting of a bracket body (3d) which is equipped with a cable clamp having a fixing screw (3m) and a seat for the fixing of a connecting cable (4), characterized in that said bracket body (3d) holds between its ends a guide pin (3e) on which two jaws (3a) are mounted in such a way as to be displaceable (S), in that the terminal further consists of an actuating bracket (3g) which acts on said jaws (3a), of an actuating screw (3h) which acts between the bracket body (3d) and the actuating bracket (3g) in such a way that the latter is moved outward (V), and of a compression spring (3f) which is pushed onto the guide pin (3e) between the two jaws (3a) so that the latter are pushed in the direction of maximum opening of the jaws.
  2. The clip terminal according to claim 1, characterized in that the actuating bracket (3g) has, at both protruding ends, sloping planes (3i) which are inclined relative to the axis of symmetry of said bracket (3g) and has a threaded bore for an actuating screw (3h) which is coaxial to the axis of symmetry and which has a left-handed thread, and in that these sloping planes (3i) act on corresponding sloping planes (3j) on the two jaws (3a) in order to close (S) the latter by the outward movement (V) of the actuating bracket (3g), while retaining the parallel position between the contact faces of the jaws.
  3. The clip terminal according to claim 1, characterized in that the bracket body (3d) has, coaxial to the axis of symmetry of the bracket, a through-bore which acts as a seat for the actuating screw (3h), wherein there is provided for said screw an annular bearing face (3n) and an access bore for the purpose of actuating the screw (3h).
  4. The clip terminal according to claim 1, characterized in that the actuating bracket has, instead of the sloping planes (3i) which act on the corresponding sloping planes (3j) of the jaws (3a), sloping guides in which pins or protrusions which project from the jaws (3a) slide, and in that the actuating screw is mounted in a rotatable manner on the bracket body (3d) and is fixed against axial displacements so that both the closing movement and the opening movement (S) of the jaws (3a) is brought about by moving (V) the actuating bracket (3g).
  5. The clip terminal according to claim 1, characterized in that it is covered by an insulating shell (3k) which has, in the region of the shaft of the actuating screw (4h) and the shaft of the screw (3m) for fixing the electrical connecting cable (4), a respective tubular attachment (3b, 3c) for preventing direct contact with the metal parts and for having access to said screws (3h, 3m) by means of a suitable tool.
  6. The clip terminal according to claim 1, characterized in that the jaws (3a), with the exception of the gripping faces thereof, are covered by an insulating shell.
  7. The clip terminal according to claim 1, characterized in that the bracket body (3d) has on the rear a contact socket for the purpose of inserting a plug with cable, and in that said contact socket is protected by a tubular attachment which projects from the insulating shell (3k) of the terminal.
EP08012291.4A 2008-07-08 2008-07-08 Bypass and earthing device with grip clamp and cable connecting element Active EP2144333B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08012291.4A EP2144333B1 (en) 2008-07-08 2008-07-08 Bypass and earthing device with grip clamp and cable connecting element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08012291.4A EP2144333B1 (en) 2008-07-08 2008-07-08 Bypass and earthing device with grip clamp and cable connecting element

Publications (2)

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EP2144333A1 EP2144333A1 (en) 2010-01-13
EP2144333B1 true EP2144333B1 (en) 2015-12-02

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EP08012291.4A Active EP2144333B1 (en) 2008-07-08 2008-07-08 Bypass and earthing device with grip clamp and cable connecting element

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EP (1) EP2144333B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20101135A1 (en) * 2010-06-23 2011-12-24 C S R S R L JOINT STRUCTURE FOR SHEETS
US8887388B2 (en) 2010-11-22 2014-11-18 Andrew Llc Method for interconnecting a coaxial connector with a solid outer conductor coaxial cable
CN105846266B (en) * 2016-05-26 2019-06-04 广州番禺电缆集团有限公司 A kind of electric distribution box cable grounding switching device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2246901A (en) * 1940-11-23 1941-06-24 American Bosch Corp Distributor cable connector
US2613243A (en) * 1948-11-05 1952-10-07 Oscar W S Frear Safety ground clamp
US2852714A (en) * 1954-02-11 1958-09-16 Reliable Electric Co Power contact protector
GB949043A (en) * 1960-01-11 1964-02-12 Bowthorpe Electric Company Ltd Improvements in or relating to connectors for cables
CH448204A (en) * 1966-09-09 1967-12-15 Peyer Siegfried Power take-off clamping device
US3577114A (en) * 1969-12-12 1971-05-04 Thomas & Betts Corp Connecting device
GB1303095A (en) * 1970-09-16 1973-01-17
GB2132422B (en) * 1982-12-16 1986-12-10 Charles Frederick Johnson Terminal connector
US4778413A (en) 1987-04-28 1988-10-18 Reino Saarinen Ground clamp for a welding apparatus
US5030106A (en) 1990-02-08 1991-07-09 Cameron Robert W Battery jumper cable clamp
US6573484B1 (en) * 2002-03-25 2003-06-03 Steven Yue Electrical heating wire assembly

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