EP0498019B1 - Protective contact terminal - Google Patents

Protective contact terminal Download PDF

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Publication number
EP0498019B1
EP0498019B1 EP91101792A EP91101792A EP0498019B1 EP 0498019 B1 EP0498019 B1 EP 0498019B1 EP 91101792 A EP91101792 A EP 91101792A EP 91101792 A EP91101792 A EP 91101792A EP 0498019 B1 EP0498019 B1 EP 0498019B1
Authority
EP
European Patent Office
Prior art keywords
bracket
clamp
protective conductor
tensioning
tightening
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
EP91101792A
Other languages
German (de)
French (fr)
Other versions
EP0498019A1 (en
Inventor
Zdenek Ing. Krec
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE59105268T priority Critical patent/DE59105268D1/en
Priority to AT91101792T priority patent/ATE121571T1/en
Priority to DK91101792.9T priority patent/DK0498019T3/en
Priority to EP91101792A priority patent/EP0498019B1/en
Priority to ES91101792T priority patent/ES2071137T3/en
Publication of EP0498019A1 publication Critical patent/EP0498019A1/en
Application granted granted Critical
Publication of EP0498019B1 publication Critical patent/EP0498019B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/26—Clip-on terminal blocks for side-by-side rail- or strip-mounting
    • H01R9/2691—Clip-on terminal blocks for side-by-side rail- or strip-mounting with ground wire connection to the rail

Definitions

  • the invention relates to a protective conductor terminal which has a tension bracket and pressure bracket for bracing on the rail edges of a mounting rail, the tension bracket and / or the pressure bracket being in electrical connection with conductor connection terminals.
  • protective conductor terminals hereinafter referred to as protective conductor terminals for short
  • spring clips or tensioning elements which can be tightened by a tensioning screw
  • tension and pressure brackets are clamped in such clamps by means of a clamping screw (DE-C-2 841 302), although a stronger clamping element can bring about a secure electrical contact.
  • the clamping screws are often over-tightened, so that reliable contact, particularly afterwards as a result of signs of fatigue, is not guaranteed. This has led to the development of resilient contact elements in protective conductor terminals of the type described at the outset.
  • the invention has for its object to improve a protective conductor terminal with a clamping screw so that its advantages come into play.
  • the pull and / or push bracket are designed to be resilient.
  • the element in question is under the action of a clamping screw, the tightening path of which is limited by a stop. This can cause a great force for safe contact to the mounting rail can be exerted without being able to tighten the clamping screw too tight.
  • the screw head of the clamping screw can spread on a tubular element, which limits the tensioning of the spring for making contact.
  • the drawbar can be made from electrically conductive material as the base body of an entire terminal body using folding technology.
  • Conductor connection terminals can be held on tabs and a limiting body for limiting the tightening path and for receiving the tensioning screw can be formed by folding the entire terminal body or by an inserted special part.
  • the protective conductor terminal according to Figure 1 has a stiff pull bracket 1 and a push bracket 2 made of resilient material. They clamp the protective conductor terminal on a mounting rail 3.
  • the pull bracket 1 and the push bracket 2 are in an electrically conductive connection with a conductor connecting terminal 4.
  • the pull bracket can preferably be made from electrically conductive material.
  • the resilient pressure bracket 2 is under the action of a clamping screw 5. Its tightening path is limited by a stop 6. As a result, the clamping screw 5 can only bend the pressure bracket 2 to the point where it is braced until the screw head 7 abuts or rides on the stop 6.
  • the stop 6 can be tubular.
  • the pulling bracket 1 is part of an entire terminal body which is formed using folding technology and which can accommodate the conductor connecting terminal 4 and possibly a further connecting terminal on holding tabs 8.
  • the stop 6 is formed by a limiting body, which also receives the clamping screw 5.
  • the protective conductor terminal according to FIG. 2 illustrates a further embodiment using folding technology, where the pull bracket 1 is bent in a horseshoe shape in a plane perpendicular to the plane of the drawing and plugged together with a connecting tab 9 extending perpendicular to the plane of the drawing.
  • a standing flap 10 is bent up from the connecting flap 9.
  • This Standing flap 10 is shaped like a horseshoe in a cross section perpendicular to the plane of the drawing; it is open to the drawing level and offers a view of the end faces 11.
  • FIG. 2 also shows the outline 12 of terminal blocks of an associated system.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Insulated Conductors (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Cable Accessories (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

An earth conductor connecting terminal, which has a tension bracket (1) and a compression bracket (2) for clamping onto the rail edges of a supporting rail (3), the tension bracket (1) and/or the compression bracket (2) being electrically connected to conductor connecting terminals (4). It is provided that the tension (1) and/or compression bracket (2) is of resilient design and is under the influence of a clamping screw (5) whose tightening movement is limited by a stop (6). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Schutzleiteranschlußklemme, die Zugbügel und Druckbügel zum Verspannen an den Schienenrändern einer Tragschiene aufweist, wobei der Zugbügel und/oder der Druckbügel mit Leiteranschlußklemmen in elektrischer Verbindung stehen.The invention relates to a protective conductor terminal which has a tension bracket and pressure bracket for bracing on the rail edges of a mounting rail, the tension bracket and / or the pressure bracket being in electrical connection with conductor connection terminals.

Bei Schutzleiteranschlußklemmen, nachstehend kurz Schutzleiterklemmen genannt, stehen üblicherweise Federbügel oder Spannelemente, die von einer Spannschraube angezogen werden können, mit der metallischen Tragschiene in elektrisch leitender Verbindung (DE-C-2 615 134, DE-U-8 521 369). In der Regel werden Zug- und Druckbügel bei derartigen Klemmen mittels einer Spannschraube verspannt (DE-C-2 841 302), wobei zwar ein kräftigeres Spannelement einen sicheren elektrischen Kontakt bewirken kann. In der Praxis werden jedoch die Spannschrauben häufig überdreht, so daß ein zuverlässiger Kontakt insbesondere nachträglich infolge von Ermüdungserscheinungen nicht gewährleistet ist. Das hat zur Entwicklung von federnden Kontaktelementen bei Schutzleiterklemmen der eingangs geschilderten Art geführt.In the case of protective conductor connection terminals, hereinafter referred to as protective conductor terminals for short, spring clips or tensioning elements, which can be tightened by a tensioning screw, are in an electrically conductive connection with the metallic mounting rail (DE-C-2 615 134, DE-U-8 521 369). As a rule, tension and pressure brackets are clamped in such clamps by means of a clamping screw (DE-C-2 841 302), although a stronger clamping element can bring about a secure electrical contact. In practice, however, the clamping screws are often over-tightened, so that reliable contact, particularly afterwards as a result of signs of fatigue, is not guaranteed. This has led to the development of resilient contact elements in protective conductor terminals of the type described at the outset.

Der Erfindung liegt die Aufgabe zugrunde, eine Schutzleiterklemme mit Spannschraube so zu verbessern, daß ihre Vorteile zum Tragen kommen.The invention has for its object to improve a protective conductor terminal with a clamping screw so that its advantages come into play.

Die Lösung der geschilderten Aufgabe erfolgt durch eine Schutzleiterklemme nach Patentanspruch 1. Danach sind der Zug- und/oder der Druckbügel federnd ausgeführt. Das betreffende Element steht unter der Einwirkung einer Spannschraube, deren Anzugsweg durch einen Anschlag begrenzt ist. Dadurch kann eine große Kraft für sichere Kontaktgabe zur Tragschiene ausgeübt werden, ohne die Spannschraube zu fest anziehen zu können. Beispielsweise kann der Schraubenkopf der Spannschraube auf einem rohrförmigen Element aufreiten, wodurch das Spannen der Feder für die Kontaktgabe begrenzt ist.The described task is solved by a protective conductor terminal according to claim 1. Thereafter, the pull and / or push bracket are designed to be resilient. The element in question is under the action of a clamping screw, the tightening path of which is limited by a stop. This can cause a great force for safe contact to the mounting rail can be exerted without being able to tighten the clamping screw too tight. For example, the screw head of the clamping screw can spread on a tubular element, which limits the tensioning of the spring for making contact.

Vorteilhafterweise kann der Zugbügel in Falttechnik aus elektrisch leitendem Material als Grundkörper eines gesamten Klemmenkörpers ausgeführt werden. Leiteranschlußklemmen können an Lappen gehaltert werden und ein Begrenzungskörper zur Begrenzung des Anzugsweges und zur Aufnahme der Spannschraube kann in Falttechnik vom gesamten Klemmenkörper oder durch ein eingesetztes Sonderteil gebildet werden.Advantageously, the drawbar can be made from electrically conductive material as the base body of an entire terminal body using folding technology. Conductor connection terminals can be held on tabs and a limiting body for limiting the tightening path and for receiving the tensioning screw can be formed by folding the entire terminal body or by an inserted special part.

Die Erfindung soll nun anhand von in der Zeichnung grob schematisch wiedergegebenen Ausführungsbeispielen näher erläutert werden:

In FIG 1
ist die Schutzleiterklemme in Seitenansicht und teilweise aufgebrochen und in Schnittansicht wiedergegeben.
In FIG 2
ist ein anderes Ausführungsbeispiel für eine Schutzleiterklemme dargestellt.
The invention will now be explained in more detail with reference to exemplary embodiments shown roughly schematically in the drawing:
In FIG. 1
is the protective conductor terminal in side view and partially broken away and shown in sectional view.
In FIG. 2
Another embodiment of a protective conductor terminal is shown.

Die Schutzleiterklemme nach Figur 1 weist einen steifen Zugbügel 1 und einen Druckbügel 2 aus federndem Material auf. Sie verspannen die Schutzleiterklemme an einer Tragschiene 3. Im Ausführungsbeispiel stehen der Zugbügel 1 und der Druckbügel 2 mit einer Leiteranschlußklemme 4 in elektrisch leitender Verbindung. Hierzu kann bei einer Klemme nach Ausführungsbeispiel gemäß Figur 1 vorzugsweise der Zugbügel aus elektrisch leitendem Material gefertigt sein. Der federnde Druckbügel 2 steht unter der Einwirkung einer Spannschraube 5. Ihr Anzugsweg ist durch einen Anschlag 6 begrenzt. Dadurch kann die Spannschraube 5 den Druckbügel 2 nur so weit zum Verspannen ausbiegen, bis der Schraubenkopf 7 auf dem Anschlag 6 ansteht bzw. aufreitet. Der Anschlag 6 kann, wie im Ausführungsbeispiel veranschaulicht, rohrförmig ausgebildet sein.The protective conductor terminal according to Figure 1 has a stiff pull bracket 1 and a push bracket 2 made of resilient material. They clamp the protective conductor terminal on a mounting rail 3. In the exemplary embodiment, the pull bracket 1 and the push bracket 2 are in an electrically conductive connection with a conductor connecting terminal 4. For this purpose, in a clamp according to the exemplary embodiment in accordance with FIG. 1, the pull bracket can preferably be made from electrically conductive material. The resilient pressure bracket 2 is under the action of a clamping screw 5. Its tightening path is limited by a stop 6. As a result, the clamping screw 5 can only bend the pressure bracket 2 to the point where it is braced until the screw head 7 abuts or rides on the stop 6. As illustrated in the exemplary embodiment, the stop 6 can be tubular.

Der Zugbügel 1 ist im Ausführungsbeispiel nach Figur 1 Teil eine in Falttechnik geformten gesamten Klemmenkörpers, der die Leiteranschlußklemme 4 und möglicherweise eine weitere Anschlußklemme an Haltelappen 8 aufnehmen kann. Der Anschlag 6 wird durch einen Begrenzungskörper gebildet, der zugleich die Spannschraube 5 aufnimmt.In the exemplary embodiment according to FIG. 1, the pulling bracket 1 is part of an entire terminal body which is formed using folding technology and which can accommodate the conductor connecting terminal 4 and possibly a further connecting terminal on holding tabs 8. The stop 6 is formed by a limiting body, which also receives the clamping screw 5.

Durch die federnde Ausführung des Druckbügels oder des Zugbügels und den am Anschlag 6 begrenzten Anzugsweg der Spannschraube 5 kann bei vorgwählter konstanter Kontaktkraft, die in weiten Grenzen vom Anzugsmoment unabhängig ist, ein gleichmäßiger elektrischer Kontakt zur Tragschiene sichergestellt werden. Hierbei können, konstruktiv vorgegeben, Kräfte ausgeübt werden, die auch bei isolierenden Oberflächenschichten, wie sie Oxidschichten darstellen, sicheren Kontakt gewährleisten. Ausßerdem wird das Aufreiten des Schraubenkopfes 7 am Anschlag 6 vom Montierenden als Grenze bemerkt, so daß das Gewinde gegen versehentliches Überdrehen durch zu große Anzugskräfte geschützt ist.Due to the resilient design of the pressure bracket or the tension bracket and the tightening path of the clamping screw 5 limited at the stop 6, a uniform electrical contact with the mounting rail can be ensured with a preselected constant contact force, which is largely independent of the tightening torque. Here, given the design, forces can be exerted which ensure reliable contact even with insulating surface layers such as oxide layers. In addition, the spreading of the screw head 7 at the stop 6 is noticed by the assembler as a limit, so that the thread is protected against accidental overtightening by excessive tightening forces.

Bei der geschilderten Schutzleiterklemme besteht weiter der Vorteil, daß das mechanisch verbindende Element zugleich den elektrischen Kontakt sicherstellt.In the case of the protective conductor terminal described, there is the further advantage that the mechanically connecting element also ensures the electrical contact.

Die Schutzleiterklemme nach Figur 2 veranschaulicht eine weitere Ausführung in Falttechnik, dort ist der Zugbügel 1 hufeisenförmig in einer Ebene senkrecht zur Zeichenebene umgebogen und mit einem senkrecht zur Zeichenebene sich erstreckenden Verbindungslappen 9 zusammengesteckt. Vom Verbindungslappen 9 ist ein Stehlappen 10 hochgebogen. Dieser Stehlappen 10 ist in einem Querschnitt senkrecht zur Zeichenebene hufeisenförmig geformt; er ist zur Zeichenebene nach vorn offen und bietet die Aufsicht auf die Stirnseiten 11. In Figur 2 ist zusätzlich der Umriß 12 von Reihenklemmen eines zugehörigen Systems veranschaulicht.The protective conductor terminal according to FIG. 2 illustrates a further embodiment using folding technology, where the pull bracket 1 is bent in a horseshoe shape in a plane perpendicular to the plane of the drawing and plugged together with a connecting tab 9 extending perpendicular to the plane of the drawing. A standing flap 10 is bent up from the connecting flap 9. This Standing flap 10 is shaped like a horseshoe in a cross section perpendicular to the plane of the drawing; it is open to the drawing level and offers a view of the end faces 11. FIG. 2 also shows the outline 12 of terminal blocks of an associated system.

Claims (3)

  1. Protective conductor connection terminal which has a tensioning clamp (1) and pressure clamp (2) for clamping it to the rail edges of a mounting rail (3), the tensioning clamp (1) and/or the pressure clamp (2) being electrically connected to conductor connection terminals (4), characterized in that the tensioning (1) and/or the pressure clamp (2) is designed so as to be flexible and is under the action of a tightening screw (5) whose tightening displacement is limited by a stop (6).
  2. Protective conductor terminal according to claim 1, characterized in that the screw head (7) of the tightening screw (5) is able to ride on a tubular stop (6).
  3. Protective conductor terminal according to claim 1, characterized in that the tensioning clamp (1) is made, using the folding method, of electrically conductive material as the base body of a complete terminal body, and conductor connection terminals (4) are mounted on holding lugs (8), a limit body holding the tightening screw (5) limiting the tightening displacement thereof.
EP91101792A 1991-02-08 1991-02-08 Protective contact terminal Expired - Lifetime EP0498019B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE59105268T DE59105268D1 (en) 1991-02-08 1991-02-08 Protective conductor connection terminal.
AT91101792T ATE121571T1 (en) 1991-02-08 1991-02-08 PROTECTIVE CONDUCTOR CONNECTION TERMINAL.
DK91101792.9T DK0498019T3 (en) 1991-02-08 1991-02-08 Protective conductor connection terminal
EP91101792A EP0498019B1 (en) 1991-02-08 1991-02-08 Protective contact terminal
ES91101792T ES2071137T3 (en) 1991-02-08 1991-02-08 TERMINAL CONNECTION OF PROTECTIVE CONDUCTORS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91101792A EP0498019B1 (en) 1991-02-08 1991-02-08 Protective contact terminal

Publications (2)

Publication Number Publication Date
EP0498019A1 EP0498019A1 (en) 1992-08-12
EP0498019B1 true EP0498019B1 (en) 1995-04-19

Family

ID=8206387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101792A Expired - Lifetime EP0498019B1 (en) 1991-02-08 1991-02-08 Protective contact terminal

Country Status (5)

Country Link
EP (1) EP0498019B1 (en)
AT (1) ATE121571T1 (en)
DE (1) DE59105268D1 (en)
DK (1) DK0498019T3 (en)
ES (1) ES2071137T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19818704C1 (en) * 1998-04-19 1999-11-04 Wago Verwaltungs Gmbh Mounting foot with protective conductor function for electrical connector block
EP3490073B1 (en) * 2017-11-22 2020-08-12 TE Connectivity Services GmbH Device for electrical connection to earth

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2615134C2 (en) * 1976-04-07 1978-03-09 Siemens Ag, 1000 Berlin Und 8000 Muenchen Protective conductor terminal block
CH631579A5 (en) * 1978-08-29 1982-08-13 Woertz Fa Electrical terminal for applying to a support rail.
DE2841302C2 (en) * 1978-09-22 1981-10-29 F. Wieland, Elektrische Industrie GmbH, 8600 Bamberg Multiple terminal block for electrical lines
DE2914182C2 (en) * 1979-04-07 1982-08-26 F. Wieland, Elektrische Industrie GmbH, 8600 Bamberg Multiple terminal block for electrical lines

Also Published As

Publication number Publication date
ES2071137T3 (en) 1995-06-16
DK0498019T3 (en) 1995-09-04
DE59105268D1 (en) 1995-05-24
EP0498019A1 (en) 1992-08-12
ATE121571T1 (en) 1995-05-15

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