EP0336251A2 - Borne à vis - Google Patents

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Publication number
EP0336251A2
EP0336251A2 EP89105376A EP89105376A EP0336251A2 EP 0336251 A2 EP0336251 A2 EP 0336251A2 EP 89105376 A EP89105376 A EP 89105376A EP 89105376 A EP89105376 A EP 89105376A EP 0336251 A2 EP0336251 A2 EP 0336251A2
Authority
EP
European Patent Office
Prior art keywords
frame
screw
terminal
clamp
transverse side
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.)
Granted
Application number
EP89105376A
Other languages
German (de)
English (en)
Other versions
EP0336251A3 (en
EP0336251B1 (fr
Inventor
Erhard Küster
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.)
ABB AG Germany
ABB AB
Original Assignee
Asea Brown Boveri AG Germany
Asea Brown Boveri AB
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, Asea Brown Boveri AB filed Critical Asea Brown Boveri AG Germany
Publication of EP0336251A2 publication Critical patent/EP0336251A2/fr
Publication of EP0336251A3 publication Critical patent/EP0336251A3/de
Application granted granted Critical
Publication of EP0336251B1 publication Critical patent/EP0336251B1/fr
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
    • 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
    • H01R4/36—Conductive members located under tip of screw
    • H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member

Definitions

  • the invention relates to a screw terminal for an electrical installation device, in particular a circuit breaker, for connecting one and / or more connecting wires or connecting rails, which is provided with a one-piece rectangular terminal frame, the upper transverse side of which has a recess for receiving a clamping screw which forms a loop with the terminal frame through box frame, which has a threaded bore in its upper cross bar adjacent to the upper transverse side of the terminal frame, the side walls of the box frame, which are offset at right angles to the long sides of the terminal frame and provided with elongated holes, are formed by guide tabs formed on the lower transverse side of the terminal frame, the engage in the elongated holes.
  • screw terminals are used both individually and in electrical installation devices for fixing or for the electrical connection of electrical conductors. Particularly when used in electrical installation devices, there is often a need for clamping devices which enable simple handling. It is often required that both individual connecting wires and connecting rails must be able to be connected equally without additional devices or precautions being required.
  • Such a screw terminal designed as a box terminal for use in a housing for an electrical installation device has become known from DE-OS 31 37 117, in which a band-like conductor strip is bent into a square terminal frame which is penetrated by a loop-shaped box frame.
  • a clamping screw works together with the terminal frame and the box frame and is used for the non-positive fixing of the connecting conductors, which can be provided both as a wire and as a flat conductor in the form of connecting rails.
  • the connecting rails are clamped between the upper transverse side of the terminal frame and the screw head of the terminal screw, it is provided for fixing individual connecting wires that they are inserted into the loop formed by the box frame, which is then tightened against the lower transverse side of the terminal frame by means of the terminal screw. It is easily possible that due to the clamping force exerted by the clamping screw, the normally parallel longitudinal sides of the clamping frame suffer permanent deformation by arching like a bow and thereby impairing the durability of the force-fitting fastening, so that the screw connection can be loosened.
  • the terminal frame is designed as an open ring, that a defined gap is provided between the upper transverse side of the terminal frame and the free end of the longitudinal side of the terminal frame forming a support leg, that the upper side of the terminal frame at Tightening the clamping screw resiliently approximates the free end of the support leg and that, in order to save material, the long side forming the support leg has at most half the width of the longitudinal side arranged opposite it and connected to the upper and lower transverse side of the terminal frame.
  • the long side of the clamp frame forming the support leg is provided with an inwardly facing cam-like bulge, which serves to temporarily hold the box frame reaching through the clamp frame in its respective position by the support leg with the cam-like bulge on the upper crossbar of the box frame.
  • the cam-like bulge acts as a resilient buffer against which the upper crossbar of the box frame strikes and which can only be overcome with a defined amount of force.
  • the great advantage of the screw terminal provided with this improvement is that, depending on whether connecting rails or connecting wires are to be fastened, the advantageous, ie assembly-friendly position of the box frame with respect to the terminal frame can be set beforehand without this setting being changed during the Assembly changes automatically. It is provided that in the event that connecting rails are to be fastened, the upper crossbar of the box frame is located directly next to the upper transverse side of the terminal frame and the bulge acting as retaining cams on the support web of the terminal frame bears against the lower crossbar of the box frame.
  • the box frame when individual connecting wires are to be fastened, the box frame is pressed down so that its upper crossbar is adjacent to the lower transverse side of the terminal frame, the cam-like bulge on the support web of the terminal frame acting on the upper crossbar of the box frame from above and a change in position prevented by moving upwards.
  • the cam-like bulge which is preferably conical, is arranged near the free end of the long side of the clamp frame forming the support leg, the distance between the cam-like bulge and the upper transverse side of the clamp frame being approximately the thickness of the upper crossbar of the box frame corresponds to or is slightly larger than this, so that in its upper position it adjoins the upper transverse side of the terminal frame.
  • a further advantageous embodiment of the invention consists in the length of the threaded shaft of the clamping screw, i.e. H. the distance between the screw head and screw end to the length of the box frame or the same length of the terminal frame. This ensures that when screwed in, when the screw head of the clamping screw rests on the upper transverse side of the terminal frame and the threaded shaft is screwed into the threaded hole in the upper transverse web of the box frame so that it rests on the upper transverse side of the terminal frame, the screw end on the lower transverse side of the terminal frame.
  • the one long side of the clamp frame, which forms a support leg is shorter than the opposite long side, so that between the free end of the long side forming the support leg and the upper transverse side of the clamp frame arranged above it a distance is formed, which gives it resilient compliance, it is ensured that when inserting a single connecting wire tes or even several connecting wires, for which a displacement of the box frame is required down, the clamping force from the lower crossbar of the box frame over its side walls to its upper crossbar and the screwed screw is transmitted to the lower transverse side of the terminal frame, so that the long sides of the Terminal frame are not involved in the power transmission of the clamping force for the connecting wires. Due to the selected geometric conditions, it is provided that the screw head rests on the upper transverse side of the terminal frame, the resilient reaction force of which causes the screw connection described above to be pretensioned.
  • this configuration combines the advantage that the support leg of the terminal frame, which is provided with the cam-like bulge and serves as a holding member for the box frame, remains free of deformation and thus its holding function for the box frame is not impaired.
  • the terminal frame essentially for holding and guiding the box frame and of course for power transmission.
  • the longitudinal side of the clamp frame opposite the support leg is provided with a molding which is matched to the respective intended use and location, for example with an arc runner. It is also possible to use parts of a contact point, e.g. B. a fixed contact piece to be molded onto the terminal frame or to be electrically connected to it.
  • the terminal frame or its longitudinal side opposite the supporting leg with corresponding projections or recesses for fixing and centering.
  • the opposite long side of the terminal frame is designed so that it at least partially projects beyond the box frame reaching through the terminal frame on its two side walls , and thus reliably prevents twisting or tilting of the box frame in the terminal frame.
  • a screw terminal 10 according to the invention is shown in side view, which is formed from a terminal frame 12 and a box frame 14, which are connected to one another by means of a clamping screw 16.
  • a flat conductor 18 is inserted into the screw terminal and is fastened with the aid of the clamping screw 16.
  • the terminal frame 12 is formed from a band-like flat material to form a rectangular open ring with an upper transverse side 20, a lower transverse side 4, a longitudinal side 2 connecting both transverse sides 20, 4 and a longitudinal side which adjoins the lower transverse side 4 and serves as a supporting leg 26.
  • a defined gap is formed between the free end 27 of the longitudinal side of the frame clamp 12, designated as the support leg 26, and the upper transverse side 20 adjacent thereto, which allows the upper transverse side 20 to have resilient mobility when the clamping screw 16 is tightened.
  • the free space between the longitudinal sides 22 and 26 and the transverse sides 20 and 24 of the terminal frame 12 is penetrated by the loop-shaped box frame 14, which also has two mutually parallel side walls 30, each of which is provided with an elongated hole 32, in which one of the lower transverse side 24 of the clamp frame 12 engages molded guide tab 25 with a positive fit.
  • a lower crosspiece 34 is used at the lower end, which is arched outward like an arch, and an upper crosspiece 36, which is formed from flush overlapping right-angled bends of the two side walls 30 and in its flat web surface 8 has a threaded bore 7.
  • This threaded hole 7 serves to receive the already mentioned clamping screw 16, which is used to apply and transmit the predetermined clamping force for fastening the electrical conductors.
  • FIG. 2 shows the top view of the arrangement according to FIG. 1, essentially showing the clamping screw 16 and the flat conductor piece 18, which for the most part covers the screw terminal 10 located underneath. Only the area of the upper transverse side 20 of the terminal frame 14 adjoining the longitudinal side 22 and one of two retaining flanks 23 formed on both sides of the longitudinal side 22, along which the box terminal 14 can slide, can be seen.
  • FIG. 3 shows a central longitudinal section through the arrangement of the screw terminal 10 shown in FIG. 1 with a flat conductor 18 fastened therein. Where applicable in this illustration, the corresponding parts are provided with the same reference numbers as in FIG. 1. It can be seen more clearly than in FIG. 1 that the upper transverse web 36 is formed from two flat sheet metal pieces which are arranged one above the other and lie closely against one another and which are each bent at right angles by the side walls 30 of the box clamps 14.
  • FIG. 4 shows a longitudinal section offset by 90 ° from the longitudinal section shown in FIG. 3 of the arrangement according to FIG. 1, from which further details of the inventive design of the screw terminal 10 can be seen.
  • this arrangement shows the arrangement of the holding flanks 23 formed on the longitudinal side 22 of the box clamp 12, which at are molded onto the long side 22 and protrude beyond the box clamp 14.
  • the lower crosspiece 34 of the box clamp 14 has a slightly curved shape, which is used to fix a wire conductor inserted between the lower crosspiece 34 of the box clamp and the lower transverse side 24 of the box clamp as centrally as possible, ie below the clamping screw 16, which, as can be seen in FIG. 5, tries to put on the lower transverse side 24 of the box clamp 12 with its screw end.
  • a tolerance distance due to the tolerance between the screw end of the clamping screw 16 and the lower transverse side 24 of the clamping frame which is denoted by the dimension "y" in FIG. 5, is in the distance between the free end 27 of the support leg 26 and the upper transverse side of the upper leg Terminal frame 12 provided distance "x" already taken into account.
  • a cam-like bulge 28 on the support leg 26 is to be pointed out, which is stamped into the support leg 26 just below the free end 27 thereof.
  • the bulge 28 is conical and directed inward and rests elastically on the box clamp 14 due to the resilient flexibility of the support leg 26, the distance between the bulge 28 and the upper transverse side 20 of the clamp frame located above it, as can be seen particularly in FIG. 3 is the thickness of the upper crossbar 36 of the box frame 14 corresponds.
  • FIG. 6 shows the top view of the arrangement shown in FIG. 5, which essentially corresponds to the view known from FIG. 2. Different from this, however, the entire screw terminal 10 can be seen from above in FIG. H. Both the terminal frame 12 with its upper transverse side 20 and the transition of the upper transverse web 36 into the side walls 30 of the box terminal 14. Furthermore, the retaining flanks 23 formed on both sides of the longitudinal side 20 connected to the upper transverse side 20 are shown, as well as a connected lead wire 19.

Landscapes

  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Surgical Instruments (AREA)
  • Casings For Electric Apparatus (AREA)
  • Discharge Heating (AREA)
  • Clamps And Clips (AREA)
  • Jigs For Machine Tools (AREA)
EP89105376A 1988-03-31 1989-03-25 Borne à vis Expired - Lifetime EP0336251B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3811023A DE3811023A1 (de) 1988-03-31 1988-03-31 Schraubklemme
DE3811023 1988-03-31

Publications (3)

Publication Number Publication Date
EP0336251A2 true EP0336251A2 (fr) 1989-10-11
EP0336251A3 EP0336251A3 (en) 1990-10-03
EP0336251B1 EP0336251B1 (fr) 1995-05-10

Family

ID=6351179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105376A Expired - Lifetime EP0336251B1 (fr) 1988-03-31 1989-03-25 Borne à vis

Country Status (6)

Country Link
EP (1) EP0336251B1 (fr)
AT (1) ATE122502T1 (fr)
DE (2) DE3811023A1 (fr)
DK (1) DK152289A (fr)
ES (1) ES2074450T3 (fr)
NO (1) NO891344L (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
FR2798514A1 (fr) * 1999-09-15 2001-03-16 Schneider Electric Ind Sa Borne de raccordement a cage elastique
EP2204884A1 (fr) 2008-12-30 2010-07-07 Landis+Gyr AG Connecteur à vis de cage
EP2725660A1 (fr) 2012-10-23 2014-04-30 Schneider Electric Industries SAS Cage élastique pour borne de raccordement et borne comportant une telle cage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19615837C2 (de) * 1996-04-20 2000-12-21 Abb Patent Gmbh Anschlußklemme

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR67552E (fr) * 1955-02-09 1958-03-14 Dispositif de raccordement d'un conducteur électrique à une borne de connexion
FR1120826A (fr) * 1955-03-14 1956-07-13 Dispositif de raccordement d'un conducteur électrique à une borne de connexion
DE1972976U (de) * 1967-09-08 1967-11-23 C A Weidmueller K G Anordnung an schraubklemmen mit zugbuegeln.
DE1977459U (de) * 1967-10-27 1968-01-25 C A Weidmueller K G Anordnung an schraubklemmen.
DE2642262C3 (de) * 1976-09-20 1980-12-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Rahmenklemme zum Anschluß elektrischer Leitungen
DE3137117A1 (de) * 1981-09-18 1983-04-14 Brown, Boveri & Cie Ag, 6800 Mannheim "schraubklemme"

Cited By (7)

* 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
FR2798514A1 (fr) * 1999-09-15 2001-03-16 Schneider Electric Ind Sa Borne de raccordement a cage elastique
EP1085601A1 (fr) * 1999-09-15 2001-03-21 Schneider Electric Industries SA Borne de raccordement a cage élastique
EP2204884A1 (fr) 2008-12-30 2010-07-07 Landis+Gyr AG Connecteur à vis de cage
WO2010075996A1 (fr) 2008-12-30 2010-07-08 Landis+Gyr Ag Borne d'ancrage à cage
EP2725660A1 (fr) 2012-10-23 2014-04-30 Schneider Electric Industries SAS Cage élastique pour borne de raccordement et borne comportant une telle cage
US9153881B2 (en) 2012-10-23 2015-10-06 Schneider Electric Industries Sas Flexible tunnel for a connection terminal and terminal comprising one such tunnel

Also Published As

Publication number Publication date
NO891344L (no) 1989-10-02
DE58909223D1 (de) 1995-06-14
DE3811023A1 (de) 1989-10-19
EP0336251A3 (en) 1990-10-03
EP0336251B1 (fr) 1995-05-10
NO891344D0 (no) 1989-03-30
DK152289A (da) 1989-10-01
ATE122502T1 (de) 1995-05-15
DK152289D0 (da) 1989-03-29
ES2074450T3 (es) 1995-09-16

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