EP0263390A2 - Borne à vis - Google Patents

Borne à vis Download PDF

Info

Publication number
EP0263390A2
EP0263390A2 EP87114123A EP87114123A EP0263390A2 EP 0263390 A2 EP0263390 A2 EP 0263390A2 EP 87114123 A EP87114123 A EP 87114123A EP 87114123 A EP87114123 A EP 87114123A EP 0263390 A2 EP0263390 A2 EP 0263390A2
Authority
EP
European Patent Office
Prior art keywords
frame
screw
box frame
spring element
terminal
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.)
Withdrawn
Application number
EP87114123A
Other languages
German (de)
English (en)
Other versions
EP0263390A3 (fr
Inventor
Dieter Hoeft
Erwin Leible
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Asea Brown Boveri AG Germany
BBC Brown Boveri AG Germany
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 Asea Brown Boveri AG Germany, BBC Brown Boveri AG Germany filed Critical Asea Brown Boveri AG Germany
Publication of EP0263390A2 publication Critical patent/EP0263390A2/fr
Publication of EP0263390A3 publication Critical patent/EP0263390A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut

Definitions

  • the invention relates to a screw terminal, in particular intended for use in a housing of an electrical installation device, for the electrical connection of one or more electrical conductors formed from wire and / or busbars with a box frame which is open on two opposite sides and has a through opening in its upper holding surface has for a clamping screw, which interacts with the box frame and a terminal frame which extends through this on the open sides and has a thread on its upper holding surface and thereby fixes the conductors to be connected in a fluid manner, in that these between the lower adjacent holding surfaces of the box frame and the Clamping frame and / or is clamped between the lower holding surface of the box frame and the shaft-side end face of the clamping screw and / or between the upper holding surface of the box frame and the head of the clamping screw.
  • Screw terminals can be found in various ways on electrical installation devices and are used to connect electrical lines with which the power supply of electrical consumers takes place.
  • the electrical conductors which can be designed as simple wires, wires provided with cable lugs or as a busbar, are mechanically fixed by the interaction of two clamping elements.
  • these clamping elements consist of a stationary contact part which is connected to one of the switching contacts of the installation device, and a clamping screw which can be screwed into the contact part and clamps the conductor to be connected between itself and the contact part.
  • the contact parts of screw terminals are often provided with recesses into which the conductor to be connected is to be inserted, where it is then fixed by means of the clamping screw.
  • Such a screw terminal has become known from DE-OS 3 137 117, in which the contact part is formed from a box frame and a terminal frame, the terminal frame reaching through the box frame open on two opposite sides and interacting with the clamping screw carried out through a through opening in the box frame.
  • This interaction consists in that the conductor or conductors to be connected - as wire of the same or different diameter or as a busbar - can be clamped between the screw head and the box frame, between the screw shaft and the box frame or between the box frame and the terminal frame.
  • Box frames and terminal frames are designed similarly and are each open on two opposite sides. In the ready-to-install state, the extension levels of the respective open side surfaces of the box clamp and box clamp are arranged at right angles to each other.
  • Screw terminals of the type described above are used in many ways in electrical switching devices, in particular in installation devices.
  • the installation devices are used in control cabinets with mounting rails designed according to general standards.
  • the distance between the mounting rails, which are generally designed as profile mounting rails with a hat profile, is arranged at such a small distance that the connection of the provided electrical conductors is made extremely difficult due to the restricted accessibility of the connection terminals.
  • the invention has for its object to provide a screw terminal of the generic type, which allows the easy connection of the conductor to be connected with a simple design even in confined spaces due to the use of busbars for cross wiring.
  • a spring element is inserted into the box frame, which is guided by the clamping screw and is supported on the box and clamp frame and thereby presses the lower holding surfaces of the box and clamp frame together.
  • the inserted conductors are held without the clamping screw initially participating.
  • the clamping screw is used to permanently fix the conductor rail intended for cross-wiring.
  • the invention takes into account that the required holding force of the spring element varies depending on the size of the screw terminals and thus on the number and thickness of the conductors to be connected. Accordingly, the size of the spring force of the spring element is matched to the size of the screw terminal.
  • the front and rear end faces of the box frame are each provided with an opening which serves to receive electrical conductors.
  • the terminal frame is also provided with recesses on its enclosed side surfaces, which are also provided for inserting and fixing electrical conductors.
  • the spring element which is preferably made of metallic material, is generally designed as a cylindrical compression spring. However, it is also possible to provide the spring element as a leaf spring instead, which is axially loaded at its ends by being supported on the box and terminal frame.
  • the spring element in a special embodiment of the invention, it can be advantageous to design the spring element as a truncated cone-shaped compression coil spring, which in the fully tensioned state, i.e. completely compressed, has only the thickness of a single layer of spring wire.
  • a further advantageous embodiment of the invention provides for the spring element to be manufactured as a permanently elastic plastic part which is inserted between the box frame and the terminal frame in the manner described above and acts on these in opposite directions.
  • the spring element can also be formed from disc springs, which are preferably placed opposite one another, so that a larger spring travel can be set.
  • box frame is provided on its lower holding web with outwardly directed, sharp-edged features which press into the electrical conductors introduced there and thus ensure a positive fit.
  • the box frame is connected in one piece to a busbar which leads to a switch contact within the installation device.
  • FIG. 1 shows the side view of a counter space or switch panel 10 of an installation system with two hat profile support rails 12 arranged one above the other, on each of which standard installation devices 14, each with a fixed nose 16 and a movable nose 18, are snapped on.
  • the hat profile mounting rails 14 are attached to the rear wall 11 of the control panel 10 at a vertical distance "A", which according to the applicable regulations with regard to the best possible use of space is determined so that in the fully assembled state only a small space 13 remains between the installation devices 14, which is provided for establishing the electrical connection of the installation devices.
  • the single-pole installation devices 14, 15 have two connection terminals 20, which are each arranged on the lower and on the upper narrow side of the installation device 14, 15.
  • the arrangement of the installation devices 14, 15 shown in FIG. 1 shows them during the electrical connection work. Both recognizable installation devices 14, 15 are connected by means of lines 22 to the supply network and by means of lines 24 to the connected consumers, not shown.
  • the upper installation device 14 is moreover connected to a busbar 26, via which adjacent installation devices, which cannot be seen in this side view, are supplied.
  • the screw terminals 20 arranged on the lower narrow side of the installation devices 14, 15 are shown in a partial section.
  • the screw terminals 20 are connected to a busbar 21 integrated in the installation devices 14, 15, which leads to switching contacts (not shown in more detail) within the installation devices 14, 15.
  • sectional view shows that the lines 22 inserted into the screw terminals 20 from below are held in the screw terminals 20 although the clamping screw 30 has not yet been tightened.
  • a spring element 32 provided according to the invention, which is shown by means of dashed lines, pressurizes the inserted line ends and thus clamps them in the screw terminal 20.
  • FIG. 2 shows an enlarged view of a screw terminal 20 according to the invention, which has a box frame 34, which is penetrated by a terminal frame 36 and which interacts with a clamping screw 30.
  • a spring element 32 is arranged within the screw terminal 20 and is enclosed by the box frame 34 and the terminal frame 36.
  • the box frame 34 has the shape of a cuboid box, in which two opposite sides are open and the other sides are closed. An opening is let into the top of the box frame 34, through which the clamping screw 30 is inserted.
  • the box frame 34 is on its Side faces open, ie here no wall belonging to the box frame 34 is provided.
  • the front and rear end faces of the box frame 34 are each interrupted by a recess 33, which is used to insert conductors to be connected.
  • the clamp frame 36 also encloses a cuboid cavity and is open on two opposite sides, while the other side surfaces, with the exception of the lower side surface, have recesses 35.
  • the corresponding recess in the top of the frame clamp 36 is provided with a screw thread which interacts with the clamping screw 30.
  • the recesses 35 on the side surfaces of the clamping frame 36 have the shape of narrow strips and are also provided for receiving conductors to be connected.
  • the spring element 32 already mentioned which is designed as a helical compression spring in FIG. 2, is arranged between the underside of the box frame 34 and the top of the clamp frame 36 and acts on both in the opposite direction, so that the underside of the clamp frame 36 contacts the top of the box frame 34 is pressed.
  • the clamping screw 30, which can be actuated by means of a tool 40 shown in FIG. 2, is loosely pushed through the top of the box frame 34 and screwed into the top of the clamp frame 36. By pressing the screw head 38, the clamping screw 30 can be moved with its shaft 39 into the interior of the box frame 34.
  • the clamp frame 36 also moves in unison, so that the top and bottom sides of the box frame 34 and the clamp frame 36, which are adjacent to one another in the idle state, take a distance between them. Becomes released the clamping screw 30, the clamp frame 36 is pressed against the box frame 34 due to the action of the spring element 32.
  • a conductor piece provided for connection can be clamped in, i. H. provisionally mounted, without the clamping screw 30 having to be operated first. If several conductor pieces are to be connected in the same screw terminal, then it is sufficient for a provisional fastening by means of pressure on the clamping screw 30 to leave a space between the lower holding surfaces of the box frame 34 and the terminal frame 36. After releasing the terminal screw 30, the conductor pieces are then clamped onto the box frame 34 and terminal frame 36 by means of the force of the spring element 32.
  • the box frame 34 has an outward indentation on its underside, which accordingly appears on the outside as an indentation 37 and is intended to contribute to holding the inserted conductor pieces for the electrical connection in a form-fitting manner, in which the indentation 37 presses into the conductor below.
  • the screw terminal 20 shown in Figure 2 is made from pre-punched sheet metal parts which are assembled in the manner described above. That the nesting of the terminal frame 36 in the box frame 34 and the insertion of the spring element 32 during production must be taken into account, that is to say that the individual parts have to be put together at the right time, if this is still possible, goes without saying.
  • the spring element 32 is guided inside the screw clamp 20 essentially by the screw shaft 39 of the clamping screw 30, but the casing through the box frame 34 around the clamp frame 36 also contributes to the axial alignment of the spring element 32.
  • FIG. 3 shows a part of a spring element 32 guided by the screw shaft 39, which is designed as a leaf spring.
  • This spring element is a rectangular strip of elastic material, for example spring steel sheet, in which a likewise strip-shaped recess 42 is punched out, so that a frame-like structure remains similar to a picture frame, the longitudinal axis of which runs parallel to the screw axis.
  • the spring element 32 is acted upon axially on its two narrow sides, whereupon it deflects laterally and bends around its transverse axis arranged at half the length.
  • the dimensions of the spring element i.e. Both its length and its width, as well as the material thickness, are determined in such a way that a sufficient holding force is achieved, taking into account the geometric conditions with regard to the dimensions of the screw terminal 20 and the electrical conductor provided for fixing.
  • the size of the spring force and the size of the screw terminal correspond.
  • FIG. 4 shows a side view of the illustration shown in FIG. 3, from which the lateral deflection of the spring element 32 can be seen on its narrow sides when acted upon.
  • the two spring strips 44 held together by the narrow sides take the screw shaft 39 between them.
  • a screw terminal 20 is shown, as can be seen from Figure 2.
  • the spring element 32 which is designed here as a frustoconical compression coil spring
  • the design of the screw terminal 20 is identical to that known from FIG. Accordingly, the reference numerals for the same parts correspond to those in FIG. 2.
  • a conductor 23 is additionally introduced in FIG. 5, which is clamped between the undersides of the box frame 34 and the terminal frame 36.
  • the design of the spring element 32 as a frustoconical compression coil spring has the advantage that the individual layers of the spring do not lie against each other but one inside the other, so that a lower overall height of the spring element 32, namely in extreme cases only one position, results or that the same Terminal size a larger number of conductors can be connected.
  • the screw terminal 20 according to the invention is installed in the installation devices 14, which are pre-assembled on the mounting rails 12 in the switch panel 10.
  • difficulties can arise when connecting the electrical conductors 23, for example individual wires 22, 24 of different cross-section or busbars 26, due to the narrow space 13 between installation devices 14 arranged one above the other, in particular if there are several conductors 22, 23 to be connected is because a conductor 23 already inserted into the screw terminal 20 can slip out again when the next conductor, e.g. B. a busbar 26 is subsequently introduced.
  • the screw terminal 20 itself is composed of stamped sheet metal parts which are given their respective shape after stamping.
  • An advantage that is associated with the configuration of the screw terminal 20 according to the invention is based on the rigidity of the screw terminal 20 achieved by the box construction of the box frame 34 and the terminal frame 36. A deformation due to the tightening of the clamping screw 30 and a loosening of the electrical connection caused thereby the consequence of possibly increased contact resistances or sparking can thus be reliably avoided.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
EP87114123A 1986-10-04 1987-09-28 Borne à vis Withdrawn EP0263390A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863633854 DE3633854A1 (de) 1986-10-04 1986-10-04 Schraubklemme
DE3633854 1986-10-04

Publications (2)

Publication Number Publication Date
EP0263390A2 true EP0263390A2 (fr) 1988-04-13
EP0263390A3 EP0263390A3 (fr) 1989-09-06

Family

ID=6311063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87114123A Withdrawn EP0263390A3 (fr) 1986-10-04 1987-09-28 Borne à vis

Country Status (3)

Country Link
EP (1) EP0263390A3 (fr)
JP (1) JPS6391971A (fr)
DE (1) DE3633854A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536482A3 (en) * 1991-10-11 1993-08-11 Felten & Guilleaume Energietechnik Ag Screw clamping member for electrical installation devices
EP0735614A3 (fr) * 1995-04-01 1998-02-11 Weidmüller Interface GmbH & Co. Douille de contact à vis
AT410613B (de) * 2001-03-20 2003-06-25 Moeller Gebaeudeautomation Kg Liftklemme
DE4013225B4 (de) * 1990-04-26 2004-02-19 Abb Patent Gmbh Schraubanschlußklemme

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9302280U1 (de) * 1993-02-17 1993-04-01 Dehn + Söhne GmbH + Co KG, 8500 Nürnberg Vorrichtung zum Anschließen eines mit einer Abschirmung versehenen Kabels
DE19513281A1 (de) * 1995-04-07 1996-10-10 Kopp Heinrich Ag Kombianschlußklemme
DE19615837C2 (de) * 1996-04-20 2000-12-21 Abb Patent Gmbh Anschlußklemme
DE19801331C2 (de) * 1998-01-16 2003-09-25 Hayo Joerg Modulares Mehrfach-Stern-Schraubklemmen-System

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH221093A (de) * 1941-10-25 1942-05-15 Landis & Gyr Ag Klemmenschraube für Ösenanschluss.
DE815054C (de) * 1948-10-02 1951-09-27 Hermann Wilden Klemmverbindung fuer elektrische Verteilungsanlagen und Abzweigkaesten
DE1100123B (de) * 1955-01-07 1961-02-23 Dr Friedrich Wieland Klemme fuer elektrische Leiter
GB1427787A (en) * 1973-09-17 1976-03-10 Electricity Council Electric cable connectors
FR2479577A1 (fr) * 1980-03-28 1981-10-02 Bonneau Albert Connecteur electrique
DE3141363C1 (de) * 1981-10-17 1983-03-31 F. Wieland, Elektrische Industrie GmbH, 8600 Bamberg Federdruckklemme für elektrische Leitungen
DE3504317A1 (de) * 1985-02-08 1986-08-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Klemme fuer elektrische leiter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013225B4 (de) * 1990-04-26 2004-02-19 Abb Patent Gmbh Schraubanschlußklemme
EP0536482A3 (en) * 1991-10-11 1993-08-11 Felten & Guilleaume Energietechnik Ag Screw clamping member for electrical installation devices
EP0735614A3 (fr) * 1995-04-01 1998-02-11 Weidmüller Interface GmbH & Co. Douille de contact à vis
AT410613B (de) * 2001-03-20 2003-06-25 Moeller Gebaeudeautomation Kg Liftklemme

Also Published As

Publication number Publication date
EP0263390A3 (fr) 1989-09-06
JPS6391971A (ja) 1988-04-22
DE3633854A1 (de) 1988-04-07

Similar Documents

Publication Publication Date Title
DE102004030085B4 (de) Klemme zum Anschluß elektrischer Leiter und Klemmenanordnung
DE602005000149T2 (de) Anschlussanordnung eines elektrischen Gerätes
EP0454019A1 (fr) Borne de raccordement à vis, spécialement pour un appareil de commutation adjacent ou des appareils similaires
EP0959529A2 (fr) Unité de connection électrique
EP0727797A1 (fr) Interrupteur de sécurité
DE29602589U1 (de) Kastenschleifleitung
DE2511385C3 (de) Elektrische Anschlußklemme
EP0263390A2 (fr) Borne à vis
DE69709533T2 (de) Verbindungsmodul mit Durchverbindung von Anschlüssen mittels eines oder mehreren beweglichen leitenden Teilen
DE102010033112B4 (de) Elektroinstallationsgerät
EP0762583A2 (fr) Système de barres omnibus à basse tension
EP0336251B1 (fr) Borne à vis
DE29706564U1 (de) Trageinrichtung für Stromschienen
EP1028488B1 (fr) Borne de connexion pour un appareillage d'installation électrique
DE20113643U1 (de) Einbaublock für einen Kabelanschlusskasten
EP1335138B1 (fr) Attache pour barre profilée
AT398654B (de) Vorrichtung zum potentialausgleich
DE3302325C1 (de) Klemmvorrichtung zum Aufsetzen auf Trägerschienen
EP1129461A1 (fr) Relais a element de couplage
DE10155924A1 (de) Vorrichtung zum Verbinden für zwei elektrische Kabel
EP1585195B1 (fr) Dispositif de barre omnibus
DE29805172U1 (de) Befestigungsvorrichtung für elektrische Installationsgeräte
DE1168990B (de) Nulleiter-Trennklemmleiste
DE19714742C2 (de) Klemme
DE102006042706A1 (de) Kernschraubenlose Montagevorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ASEA BROWN BOVERI AKTIENGESELLSCHAFT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19900210

17Q First examination report despatched

Effective date: 19910524

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19911004

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LEIBLE, ERWIN

Inventor name: HOEFT, DIETER