EP0824757B1 - Electrical switch with locking-screw securing device - Google Patents

Electrical switch with locking-screw securing device Download PDF

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Publication number
EP0824757B1
EP0824757B1 EP97905076A EP97905076A EP0824757B1 EP 0824757 B1 EP0824757 B1 EP 0824757B1 EP 97905076 A EP97905076 A EP 97905076A EP 97905076 A EP97905076 A EP 97905076A EP 0824757 B1 EP0824757 B1 EP 0824757B1
Authority
EP
European Patent Office
Prior art keywords
clamping
locking
insertion aid
screw
switching device
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
EP97905076A
Other languages
German (de)
French (fr)
Other versions
EP0824757A1 (en
Inventor
Norbert Rösner
Peter Becker
Helmut Kern
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.)
Eaton Industries GmbH
Original Assignee
Moeller GmbH
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Filing date
Publication date
Application filed by Moeller GmbH filed Critical Moeller GmbH
Publication of EP0824757A1 publication Critical patent/EP0824757A1/en
Application granted granted Critical
Publication of EP0824757B1 publication Critical patent/EP0824757B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-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
    • H01R4/28Clamped connections, spring connections
    • H01R4/30Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/301Clamped connections, spring connections utilising a screw or nut clamping member having means for preventing complete unscrewing of screw or nut
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/58Electric connections to or between contacts; Terminals
    • H01H1/5855Electric connections to or between contacts; Terminals characterised by the use of a wire clamping screw or nut
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00Details of electromagnetic relays
    • H01H50/14Terminal arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02Bases, casings, or covers
    • H01H9/0264Protective covers for terminals

Definitions

  • the invention relates to an electrical switching device with locking screw lock, with at least one locking screw with locking washer, one of the number of locking screws corresponding number of fixed contact pieces and one inner cover as a control room cover and one arranged above it outer cover as an insertion aid with coaxial to the Clamping screws arranged through holes and locking means for snapping onto the switchgear.
  • GB 2 044 877 A discloses a generic Switchgear with locking screw lock, with at least a locking screw with locking washer, one of the number of Corresponding number of fixed contact pieces, four identical outer fuse covers as an insertion aid which are arranged coaxially to the clamping screws Through holes, locking means for snapping onto the Switchgear and one assigned to each through hole Locking cams, through which the clamping screw against independent Screwing is secured, is trained. Training the Through holes and those immediately adjacent to them Locking cams require a complex mold and manufacturing process for the fuse covers.
  • the invention has for its object to cover the To design clamping screws so that when screwed up the clamping screws both against falling out removed outer cover as well as against the automatic Are secured.
  • the insertion aid has an inner cover to cover the control room is arranged, which with edge-extending, the holding flanges assigned to the clamping screws with one each arranged coaxially to the clamping screws and through holes Through hole is formed in which the clamping screws held captive when screwed up are, the outer diameter of the clamping disc larger and the diameter of the screw head is smaller than the diameter of the push-through hole, and that the insertion aid to the Then through holes on the edge with protruding downwards, resiliently spreadable and overlapping the holding flanges Edge webs is formed on the inside of the Locking cams are formed above, and that each locking cam such a distance from the installation level of the insertion aid on the switching device, so that it is rotated under the Condition of the clamping screw on the underside of the retaining flange the adjacent clamping disc snaps into place.
  • the invention enables the clamping of the clamping screws with clamping disc by resiliently snapping on the outer cover, whereby the clamping screw prevents it from turning in automatically is secured.
  • the special thing here is that the Clamping disc of the clamping screw between the outer cover and the inner cover, namely between the insertion aid, i.e. the locking cam of the insertion aid and the control room cover, i.e. their additionally molded holding flanges, clamped becomes. So the clamping screw is indirectly on the outside Cover of the insertion aid held on the clamping disc and secured against unscrewing.
  • Control room cover with holding flanges also prevents the clamping screws from falling out removed outer cover.
  • Another major advantage can be seen in the fact that the screw head of the clamping screw is free of clamping devices. When screwing in later the clamping screw after inserting cables the screwdriver does not hinder and neither can Plastic is rubbed off when screwing in the clamping screw, which could lead to contamination of the device.
  • the outer and inner lids made of suitable ones are advantageous thermoplastics manufactured by injection molding.
  • each clamping screw has an individually projecting one Holding flange with through hole is assigned.
  • the locking cam is preferably centered on the inside of the edge web assigned to each through hole, so that the locking cam at slightly arched clamping washers below the highest bulge point the clamping disc can grip.
  • the electrical Switchgear 1 schematically shows an electrical switching device, for example contactor, circuit breaker, auxiliary contactor or the same with those parts that are used to explain the The inventive concept is shown.
  • the electrical Switchgear 1 is in the individual, through partitions divided compartments equipped with fixed contact pieces 6. They are two on opposite sides rows of five clamping screws each of the switching device intended.
  • a locking screw 2 with locking washer 3 is shown as an example, further as an inner cover the control room cover 5.
  • the insertion aid 4 is with Through holes 40 corresponding to the clamping screws to be screwed in 2 formed, these through holes 40 also serve when screwing in the clamping screws 2 the screwdriver respectively.
  • the control room cover 5 is according to the invention additionally on both sides of the edge, which correspond to the rows of Clamping screws 2 are adjacent, with protruding retaining flanges 50 formed, namely each compartment of the switching device 1, in which a clamping screw 2 is arranged, is a Holding flange 50 assigned.
  • the holding flanges 50 are with a through hole 51 is formed, which is so large that the Head 2a of the clamping screw 2 can be inserted.
  • the Outside diameter of the clamping disc 3 is always larger than that Diameter of the through hole 51 of the retaining flange, so that the clamping disc 3 is not guided through the through hole 51 can be.
  • the through holes 51 of the control room cover 5 are coaxial to the through holes 40 of the insertion aid 4 and coaxial to the screwed-in clamping screw 2 of each compartment of the switching device 1 in the installed state.
  • the insertion aid 4 also points to the one adjoining the through holes 40 Side of a web 41 projecting downwards, associated with each through hole 40 on the inside the lower edge with an inwardly projecting Locking cam 42 is formed.
  • the insertion aid 4 is off made of a thermoplastic, such that the two opposite edge webs 41 in Arrow direction P1 (Fig. 5) slightly spread apart and can be snapped onto the switching device 1 in this way.
  • the switching device 1 is concretized with Insertion aid 4, control room cover 5 and in the assembled State shown in the inventive configuration.
  • the Insertion aid 4 according to FIG. 2 points at two to one another opposite sides five through holes 40 each, which in Row are arranged on. It is of course also possible that Form rows angled, then it is necessary that the control room cover 5 with the through holes 51 and Holding flanges 50 is formed correspondingly assigned. It it is also possible to have control room covers 5 and insertion aids 4 for clamping screws arranged on one side only or also for fewer clamping screws in a row using the invention provided. 2 are on the bottom the insertion aid 4 further locking webs 43, which engage the Use insertion aid on the electrical device.
  • control room cover 5 that matches the insertion aid 4 shown, the middle covering the control room Area adapted in its design to the switching device 1 is.
  • On the control room cover 5 are according to the invention in the congruent to the through holes 40 of the insertion aid 4 Areas protruding sideways, i.e. widening them accordingly, the holding flanges 50, each with a push-through opening 51 trained.
  • the assembly of the switching device 1 using the invention trained control room cover 5 and insertion aid 4 is explained with reference to FIG. 1.
  • the Control room cover 5 mounted on switchgear 1.
  • the clamping screws 2 with the clamping washers 3 again turned up until the clamping washers are below the retaining flanges 50 rest on the control room cover 5 and the screw head 2a of the clamping screw through the through opening 51 of the holding flange 50 protrudes.
  • Fig. 4 the two right-hand clamping screws 2 with a clamping washer 3 are shown in the assembled state, the head 2a of the clamping screw not closer here shown.
  • the left three clamping screws show that State in which the clamping screw is turned all the way down and the clamping disc 3 when rotating down by elastic Spread the locking cam 42 outwards from the previous one described fixed position is moved. This screwing in the clamping screw 2 down is only against the spring force of the locking cam 42 possible, this spring force so is dimensioned that in this state the clamping screw 2 itself do not screw in during shaking independently during transport can. 5 are also the fixed contact pieces 6 shown with a nut thread 6a for receiving the Clamping screw 2 are equipped.
  • the clamping screws 2 with Clamping disks 3 are in the pre-assembled state shown, the clamping disc 3 between locking cams 42nd the insertion aid and the holding flange of the control room cover 5 is clamped.
  • the clamping screw 2 After inserting a cable between Fixed contact piece 6 and clamping disk 3 can then the clamping screw 2 by means of a through the opening 40 of the Insertion aid 4 and through hole 51 of the control room cover 5 in the screw head 2a screwdriver in the direction of the arrow M1 are screwed in, being applied by the Force in the direction of arrow M1 of the edge web 41 with locking cams 42 in Arrow direction P1 is elastically spread outwards, whereby the clamping disc 3 is released and the clamping screw 2 can be turned down until the line is attached.
  • the distance a of the locking cams 42 from the contact surface the insertion aid 4 on the switching device 1 is dimensioned that the clamping disc 3 between the underside of the holding flanges 50 of the control room cover 5 (Fig. 3) and the locking cam 42 is easy to pinch.
  • the height is also corresponding to dimension the locking web 41.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Lock And Its Accessories (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Fuses (AREA)
  • Clamps And Clips (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Connection Of Plates (AREA)

Abstract

The invention concerns an electrical switch, for instance a contactor, protective circuit breaker or relay, with a locking-screw securing device. The switch (1) is fitted with at least one locking screw (2) with a washer (3), the same number of fixed contact pieces (6) as there are locking screws (2), plus an inner cover (5) which covers over the switch compartment and, disposed over it, an outer cover which acts as a lead-insertion guide (4) and has through-bores (40) coaxial with the locking screws (2) as well as snap-in engagement means enabling it to be fitted on to the switch (1). The switch-compartment cover (5) has, extending along its sides, flanges (50) associated with the locking screws (2), the flanges having a through-hole (51) located coaxially with each locking screw (2) and each through-bore (40) in the lead-insertion guide (4). When not in the screwed-down position, the locking screws (2) are held in the flanges (50) so that they cannot drop out.

Description

Technisches GebietTechnical field

Die Erfindung bezieht sich auf ein elektrisches Schaltgerät mit Klemmschraubensicherung, mit mindestens einer Klemmschraube mit Klemmscheibe, einer der Anzahl der Klemmschrauben entsprechenden Anzahl von Festkontaktstücken sowie einem inneren Deckel als Schaltraumabdeckung und einem darüber angeordneten äußeren Deckel als Einführhilfe mit koaxial zu den Klemmschrauben angeordneten Durchgangslöchern und Rastmitteln zum Aufrasten an das Schaltgerät.The invention relates to an electrical switching device with locking screw lock, with at least one locking screw with locking washer, one of the number of locking screws corresponding number of fixed contact pieces and one inner cover as a control room cover and one arranged above it outer cover as an insertion aid with coaxial to the Clamping screws arranged through holes and locking means for snapping onto the switchgear.

Stand der TechnikState of the art

Es ist erforderlich, die Klemmschrauben gegen Herausfallen, desweiteren auch gegen ein selbsttätiges Drehen, insbesondere Eindrehen während des Transportes, zu sichern. Insbesondere der Verhinderung des Herausfallens der Klemmschrauben kommt eine besondere Bedeutung zu, denn es wird im Rahmen von Rationalisierungsbestrebungen dazu übergegangen, Klemmschrauben, die erst an einer Montagestelle mit Leitungen zu versehen sind, bewußt nur einige Gewindegänge tief einzuschrauben - also im hochgeschraubten Zustand anzuliefern -, um dem Monteur an der Baustelle das Herausschrauben der Klemmschrauben vor dem Einfügen eines Leitungsendes zu ersparen, so daß der Monteur nur noch nach Einstecken eines Leitungsendes die Klemmschrauben einschrauben und das Leitungsende gegen das Festkontaktstück festschrauben muß. It is necessary to prevent the clamping screws from falling out, furthermore also against automatic turning, in particular Secure during transportation. In particular preventing the clamping screws from falling out of particular importance, because it is part of rationalization efforts transitioned to clamping screws, to be provided with lines only at an assembly point are consciously screwing in only a few threads - So to deliver in the screwed-up state - to the fitter Unscrew the clamping screws at the construction site to save the insertion of a line end, so that the Installer only after inserting a cable end Screw in the clamping screws and the cable end against the Screw the fixed contact piece tight.

Es sind Sicherungen zum Sichern und Festhalten von Klemmschrauben im annähernd herausgedrehten Zustand nach Druckschrift DE 29 09 202 C2 und DE 27 15 572 C2 bekannt. Bei der ersteren Lösung wird eine Abdeck- und Sicherungskappe für die Klemmschrauben vorgesehen, die mit federnden Ringansätzen ausgerüstet ist, in denen die Köpfe der Klemmschrauben festgeklemmt werden. Diese Anordnung hat jedoch den Nachteil, daß nach Abzug der Abdeck- und Sicherungskappe die Klemmschrauben, falls sie nicht genügend eingedreht sind, herausfallen können. Ähnlich verhält es sich auch mit einer Lösung gemäß Druckschrift DE 24 48 111 C2, bei der die Klemmscheibe mittels einer Abdeckung mit Verriegelungszungen fixiert wird, die zwar das Herausfallen der Klemmschraube bei vorhandener Abdeckung verhindern und auch das selbsttätige Herausdrehen der Klemmschraube verhindern, jedoch bei abgenommener Abdeckung das Herausfallen der Klemmschraube im hochgeschraubten Zustand nicht verhindert wird.They are fuses for securing and holding clamping screws in almost unscrewed condition according to the publication DE 29 09 202 C2 and DE 27 15 572 C2 are known. In the The former solution is a cover and safety cap for the Clamping screws provided with resilient ring approaches is equipped in which the heads of the clamping screws are clamped become. However, this arrangement has the disadvantage that after removing the cover and safety cap, the clamping screws, if they are not screwed in enough, fall out can. The situation is similar with a solution according to Document DE 24 48 111 C2, in which the clamping disc by means of a cover is fixed with locking tongues, which the falling out of the clamping screw with existing Prevent cover and also the automatic unscrewing prevent the clamping screw, but with the one removed Cover the falling out of the clamping screw in the screwed up Condition is not prevented.

Die Druckschrift GB 2 044 877 A offenbart ein gattungsgemäßes Schaltgerät mit Klemmschraubensicherung, mit mindestens einer Klemmschraube mit Klemmscheibe, einer der Anzahl der Klemmschrauben entsprechenden Anzahl von Festkontaktstücken, vier gleichartigen äußeren Sicherungsabdeckungen als Einführhilfe , die mit koaxial zu den Klemmschrauben angeordneten Durchgangslöchern, Rastmitteln zum Aufrasten an das Schaltgerät und einem jedem Durchgangsloch zugeordneten Rastnocken, durch den die Klemmschraube gegen selbständiges Eindrehen gesichert ist, ausgebildet ist. Die Ausbildung der Durchgangslöcher und der diesen unmittelbar benachbarten Rastnocken erfordert ein aufwendiges Formwerkzeug und Herstellungsverfahren für die Sicherungsabdeckungen.GB 2 044 877 A discloses a generic Switchgear with locking screw lock, with at least a locking screw with locking washer, one of the number of Corresponding number of fixed contact pieces, four identical outer fuse covers as an insertion aid which are arranged coaxially to the clamping screws Through holes, locking means for snapping onto the Switchgear and one assigned to each through hole Locking cams, through which the clamping screw against independent Screwing is secured, is trained. Training the Through holes and those immediately adjacent to them Locking cams require a complex mold and manufacturing process for the fuse covers.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt die Aufgabe zugrunde, die Abdeckung der Klemmschrauben so zu gestalten, daß im hochgeschraubten Zustand die Klemmschrauben sowohl gegen das Herausfallen bei abgenommenem äußerem Deckel als auch gegen das selbsttätige Eindrehen gesichert sind.The invention has for its object to cover the To design clamping screws so that when screwed up the clamping screws both against falling out removed outer cover as well as against the automatic Are secured.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß unterhalb der Einführhilfe ein inneren Deckel als Schaltraumabdekkung angeordnet ist, die mit randseitig sich erstreckenden, den Klemmschrauben zugeordneten Halteflanschen mit je einem koaxial zu den Klemmschrauben und Durchgangslöchern angeordneten Durchsteckloch ausgebildet ist, in denen die Klemmschrauben im hochgeschraubten Zustand verliersicher gehaltert sind, wobei der Außendurchmesser der Klemmscheibe größer und der Durchmesser des Schraubenkopfes kleiner als der Durchmesser des Durchsteckloches ist, und daß die Einführhilfe an die Durchgangslöcher anschließend randseitig mit nach unten vorstehenden, federnd ab-spreizbaren und die Halteflansche übergreifenden Randstegen ausgebildet ist, an die innenseitig die Rastnocken vorstehend angeformt sind, und daß jeder Rastnokken einen solchen Abstand von der Anlageebene der Einführhilfe am Schaltgerät aufweist, so daß er unter die im hochgedrehten Zustand der Klemmschraube an der Unterseite des Halteflansches anliegende Klemmscheibe rastet.This object is achieved in that below the insertion aid has an inner cover to cover the control room is arranged, which with edge-extending, the holding flanges assigned to the clamping screws with one each arranged coaxially to the clamping screws and through holes Through hole is formed in which the clamping screws held captive when screwed up are, the outer diameter of the clamping disc larger and the diameter of the screw head is smaller than the diameter of the push-through hole, and that the insertion aid to the Then through holes on the edge with protruding downwards, resiliently spreadable and overlapping the holding flanges Edge webs is formed on the inside of the Locking cams are formed above, and that each locking cam such a distance from the installation level of the insertion aid on the switching device, so that it is rotated under the Condition of the clamping screw on the underside of the retaining flange the adjacent clamping disc snaps into place.

Die Erfindung ermöglicht, das Festklemmen der Klemmschrauben mit Klemmscheibe durch federndes Aufrasten des äußeren Dekkels, wodurch die Klemmschraube gegen selbständiges Eindrehen gesichert wird. Das besondere ist jedoch hierbei, daß die Klemmscheibe der Klemmschraube zwischen dem äußeren Deckel und dem inneren Deckel, nämlich zwischen der Einführhilfe, d.h. dem Rastnocken der Einführhilfe und der Schaltraumabdekkung, d.h. deren zusätzlich angeformte Halteflansche, festgeklemmt wird. So wird die Klemmschraube indirekt an dem äußeren Deckel der Einführhilfe an der Klemmscheibe gehalten und gegen selbständiges Eindrehen gesichert. Die Ausbildung der Schaltraumabdeckung mit Halteflanschen bringt die Klemmscheibe der Klemmschraube in eine bestimmte Lage und hält sie in dieser Lage, so daß der Rastnocken der Einführhilfe unter die Klemmscheibe rasten kann. Die erfindungsgemäße Form der Schaltraumabdeckung mit Halteflanschen und Durchstecklöchern verhindert zudem das Herausfallen der Klemmschrauben auch bei abgenommenem äußeren Deckel. Ein weiterer wesentlicher Vorteil ist darin zu sehen, daß der Schraubenkopf der Klemmschraube frei von Klemmvorrichtungen ist. Beim späteren Eindrehen der Klemmschraube nach dem Einlegen von Leitungen wird der Schraubendreher nicht behindert und es kann auch kein Kunststoff beim Eindrehen der Klemmschraube abgerieben werden, der zu einer Verschmutzung des Gerätes führen könnte. Vorteilhaft sind der äußere und der innere Deckel aus geeigneten thermoplastischen Kunststoffen durch Spritzgießen hergestellt. Mit Hilfe der Rastnocken der Einführhilfe ist es möglich, die Klemmschraube während des Transportes gegen selbsttätiges Eindrehen zu sichern, da mit Hilfe des Rastnokkens ein Festklemmen der Klemmscheibe der Klemmschraube möglich ist. Durch den vorgesehenen Abstand der Rastnocken von der Anlageebene der Einführhilfe am Schaltgerät rastet der Rastnocken unter die im hochgedrehten Zustand der Klemmschraube an der Unterseite des Halteflansches anliegenden Klemmscheibe, wodurch die Klemmscheibe zwischen Halteflansch der Schaltraumabdeckung und Rastnocken der Einführhilfe festklemmbar ist und die Klemmschraube gegen selbsttätiges Eindrehen gesichert ist, also rüttelsicher im hochgedrehten Zustand während des Transportes in dem Schaltgerät eingebaut ist.The invention enables the clamping of the clamping screws with clamping disc by resiliently snapping on the outer cover, whereby the clamping screw prevents it from turning in automatically is secured. The special thing here is that the Clamping disc of the clamping screw between the outer cover and the inner cover, namely between the insertion aid, i.e. the locking cam of the insertion aid and the control room cover, i.e. their additionally molded holding flanges, clamped becomes. So the clamping screw is indirectly on the outside Cover of the insertion aid held on the clamping disc and secured against unscrewing. Training the Control panel cover with holding flanges brings the clamping disc the clamping screw in a certain position and holds it in this position, so that the locking cam of the insertion aid under the clamping disc can snap. The form of the invention Control room cover with holding flanges and push-through holes also prevents the clamping screws from falling out removed outer cover. Another major advantage can be seen in the fact that the screw head of the clamping screw is free of clamping devices. When screwing in later the clamping screw after inserting cables the screwdriver does not hinder and neither can Plastic is rubbed off when screwing in the clamping screw, which could lead to contamination of the device. The outer and inner lids made of suitable ones are advantageous thermoplastics manufactured by injection molding. With the help of the locking cams of the insertion aid it is possible to counter the clamping screw during transport secure automatic screwing in, as with the help of the locking cam it is possible to clamp the clamping disc of the clamping screw is. Due to the intended distance of the locking cams from the system level of the insertion aid on the switchgear engages Locking cams under the clamping screw when it is turned up rest on the underside of the retaining flange Clamping disc, which creates the clamping disc between the holding flange the control room cover and locking cams of the insertion aid is clampable and the clamping screw against automatic Screwing in is secured, i.e. vibration-proof when turned up Condition installed in the switchgear during transport is.

Es ist vorteilhaft, daß jeder Klemmschraube je ein einzeln vorstehender Halteflansch mit Durchsteckloch zugeordnet ist.It is advantageous that each clamping screw has an individually projecting one Holding flange with through hole is assigned.

Bevorzugt ist der Rastnocken am Randsteg innenseitig mittig jedem Durchgangsloch zugeordnet, so daß der Rastnocken bei leicht gewölbten Klemmscheiben unter den höchsten Wölbungspunkt der Klemmscheibe greifen kann. The locking cam is preferably centered on the inside of the edge web assigned to each through hole, so that the locking cam at slightly arched clamping washers below the highest bulge point the clamping disc can grip.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Nachfolgend wird die Erfindung anhand von Zeichnungen näher erläutert. Es zeigen

Figur 1:
eine schematisierte Explosionsdarstellung eines Schaltgerätes;
Figur 2:
eine Einführhilfe in perspektivischer Darstellung für ein Schaltgerät mit zwei Klemmenreihen für je fünf Klemmschrauben;
Figur 3:
eine Schaltraumabdeckung passend zu der Einführhilfe gemäß Fig. 2 in perspektivischer Darstellung;
Figur 4:
eine teilweise geschnittene Ansicht des Schaltgerätes gemäß Ansicht A nach Fig. 1 mit Einführhilfe und Schaltraumabdeckung gemäß Fig. 2 und 3;
Figur 5:
eine teilweise geschnittene Ansicht des Schaltgerätes gemäß Fig. 1 in der Ansicht B bzw. in der Ansicht C gemäß Fig. 4 mit einer Schaltraumabdeckung und Einführhilfe gemäß Fig. 3 und 2.
The invention is explained in more detail below with reference to drawings. Show it
Figure 1:
a schematic exploded view of a switching device;
Figure 2:
an insertion aid in perspective for a switching device with two rows of terminals for five terminal screws;
Figure 3:
a control room cover matching the insertion aid of Figure 2 in a perspective view.
Figure 4:
a partially sectioned view of the switching device according to view A of FIG 1 with insertion aid and switch compartment cover according to FIGS. 2 and 3.
Figure 5:
1 in view B or in view C according to FIG. 4 with a control room cover and insertion aid according to FIGS. 3 and 2.

Bester Weg zur Ausführung der ErfindungBest way to carry out the invention

In der Fig. 1 ist schematisch ein elektrisches Schaltgerät, beispielsweise Schaltschütz, Schutzschalter, Hilfsschütz oder dergleichen mit denjenigen Teilen, die zur Erläuterung des Erfindungsgedankens erforderlich sind, dargestellt. Das elektrische Schaltgerät 1 ist in den einzelnen, durch Zwischenwände abgeteilten Abteilen mit Festkontaktstücken 6 ausgerüstet. Es sind zwei auf einander gegenüberliegenden Seiten des Schaltgerätes ausgebildete Reihen von jeweils fünf Klemmschrauben vorgesehen. Eine Klemmschraube 2 mit Klemmscheibe 3 ist beispielhaft dargestellt, des weiteren als innerer Deckel die Schaltraumabdeckung 5. Hierüber kommt abschließend als äußerer Deckel die Einführhilfe 4. Die Einführhilfe 4 ist mit Durchgangslöchern 40 entsprechend den einzuschraubenden Klemmschrauben 2 ausgebildet, wobei diese Durchgangslöcher 40 auch dazu dienen, beim Eindrehen der Klemmschrauben 2 den Schraubendreher zu führen. Die Schaltraumabdeckung 5 ist erfindungsgemäß zusätzlich an beiden Randseiten, die den Reihen von Klemmschrauben 2 benachbart sind, mit vorstehenden Halteflanschen 50 ausgebildet, und zwar jedem Abteil des Schaltgerätes 1, in dem eine Klemmschraube 2 angeordnet wird, ist ein Halteflansch 50 zugeordnet. Die Halteflansche 50 sind mit einem Durchsteckloch 51 ausgebildet, das so groß ist, daß der Kopf 2a der Klemmschraube 2 hindurch gesteckt werden kann. Der Außendurchmesser der Klemmscheibe 3 ist stets größer als der Durchmesser des Durchsteckloches 51 des Halteflansches, so daß die Klemmscheibe 3 nicht durch das Durchsteckloch 51 geführt werden kann. Die Durchstecklöcher 51 der Schaltraumabdeckung 5 sind koaxial zu den Durchgangslöchern 40 der Einführhilfe 4 und koaxial zu der eingedrehten Klemmschraube 2 jedes Abteils des Schaltgerätes 1 im eingebauten Zustand. Die Einführhilfe 4 weist zusätzlich an der an die Durchgangslöcher 40 anschließenden Seite einen nach unten vorstehenden Randsteg 41 auf, der jedem Durchgangsloch 40 zugeordnet auf der Innenseite nahe dem unteren Rand mit einem nach innen vorstehenden angeformten Rastnocken 42 ausgebildet ist. Die Einführhilfe 4 ist aus einem thermoplastischen Kunststoff hergestellt, dergestalt, daß die beiden einander gegenüberliegenden Randstege 41 in Pfeilrichtung P1 (Fig. 5) leicht federnd auseinander spreizbar und auf diese Weise auf das Schaltgerät 1 aufrastbar sind.1 schematically shows an electrical switching device, for example contactor, circuit breaker, auxiliary contactor or the same with those parts that are used to explain the The inventive concept is shown. The electrical Switchgear 1 is in the individual, through partitions divided compartments equipped with fixed contact pieces 6. They are two on opposite sides rows of five clamping screws each of the switching device intended. A locking screw 2 with locking washer 3 is shown as an example, further as an inner cover the control room cover 5. Finally comes as outer cover the insertion aid 4. The insertion aid 4 is with Through holes 40 corresponding to the clamping screws to be screwed in 2 formed, these through holes 40 also serve when screwing in the clamping screws 2 the screwdriver respectively. The control room cover 5 is according to the invention additionally on both sides of the edge, which correspond to the rows of Clamping screws 2 are adjacent, with protruding retaining flanges 50 formed, namely each compartment of the switching device 1, in which a clamping screw 2 is arranged, is a Holding flange 50 assigned. The holding flanges 50 are with a through hole 51 is formed, which is so large that the Head 2a of the clamping screw 2 can be inserted. The Outside diameter of the clamping disc 3 is always larger than that Diameter of the through hole 51 of the retaining flange, so that the clamping disc 3 is not guided through the through hole 51 can be. The through holes 51 of the control room cover 5 are coaxial to the through holes 40 of the insertion aid 4 and coaxial to the screwed-in clamping screw 2 of each compartment of the switching device 1 in the installed state. The insertion aid 4 also points to the one adjoining the through holes 40 Side of a web 41 projecting downwards, associated with each through hole 40 on the inside the lower edge with an inwardly projecting Locking cam 42 is formed. The insertion aid 4 is off made of a thermoplastic, such that the two opposite edge webs 41 in Arrow direction P1 (Fig. 5) slightly spread apart and can be snapped onto the switching device 1 in this way.

In den Fig. 2 bis 5 ist das Schaltgerät 1 konkretisiert mit Einführhilfe 4, Schaltraumabdeckung 5 und im montierten Zustand in erfindungsgemäßer Ausgestaltung dargestellt. Die Einführhilfe 4 gemäß Fig. 2 weist hierbei an zwei aneinander gegenüberliegenden Seiten je fünf Durchgangslöcher 40, die in Reihe angeordnet sind, auf. Es ist natürlich auch möglich, die Reihen abgewinkelt auszubilden, dann ist es erforderlich, daß die Schaltraumabdeckung 5 mit den Durchstecklöchern 51 und den Halteflanschen 50 entsprechend zugeordnet ausgebildet wird. Es ist auch möglich, Schaltraumabdeckungen 5 und Einführhilfen 4 für nur einseitig angeordnete Klemmschrauben oder auch für weniger Klemmschrauben in einer Reihe in Anwendung der Erfindung vorzusehen. Gemäß Fig. 2 befinden sich auf der Unterseite der Einführhilfe 4 weitere Raststege 43, die dem Einrasten der Einführhilfe am elektrischen Gerät dienen. In der Fig. 3 ist die zu der Einführhilfe 4 passende Schaltraumabdeckung 5 dargestellt, deren mittlerer den Schaltraum abdeckender Bereich in seiner Ausgestaltung dem Schaltgerät 1 angepaßt ist. An der Schaltraumabdeckung 5 sind erfindungsgemäß in den zu den Durchgangslöchern 40 der Einführhilfe 4 kongruenten Bereichen seitlich vorstehend, d.h. diese entsprechend verbreiternd, die Halteflansche 50 mit jeweils einer Durchstecköffnung 51 ausgebildet.2 to 5, the switching device 1 is concretized with Insertion aid 4, control room cover 5 and in the assembled State shown in the inventive configuration. The Insertion aid 4 according to FIG. 2 points at two to one another opposite sides five through holes 40 each, which in Row are arranged on. It is of course also possible that Form rows angled, then it is necessary that the control room cover 5 with the through holes 51 and Holding flanges 50 is formed correspondingly assigned. It it is also possible to have control room covers 5 and insertion aids 4 for clamping screws arranged on one side only or also for fewer clamping screws in a row using the invention provided. 2 are on the bottom the insertion aid 4 further locking webs 43, which engage the Use insertion aid on the electrical device. 3 is the control room cover 5 that matches the insertion aid 4 shown, the middle covering the control room Area adapted in its design to the switching device 1 is. On the control room cover 5 are according to the invention in the congruent to the through holes 40 of the insertion aid 4 Areas protruding sideways, i.e. widening them accordingly, the holding flanges 50, each with a push-through opening 51 trained.

Die Montage des Schaltgerätes 1 unter Einsatz der erfindungsgemäß ausgebildeten Schaltraumabdeckung 5 und Einführhilfe 4 wird anhand der Fig. 1 erläutert. Zuerst werden in das Schaltgerät 1 bei abgenommener Einführhilfe 4 und Schaltraumabdeckung 5 die Klemmschrauben 2 mit Klemmscheiben 3 eingedreht, und zwar so weit nach unten wie möglich. Danach wird die Schaltraumabdeckung 5 auf das Schaltgerät 1 montiert. Danach werden die Klemmschrauben 2 mit den Klemmscheiben 3 wieder hochgedreht, bis die Klemmscheiben unterhalb der Halteflansche 50 an der Schaltraumabdeckung 5 anliegen und der Schraubenkopf 2a der Klemmschraube durch die Durchstecköffnung 51 des Halteflansches 50 ragt. Danach kann die Einführhilfe 4 auf die Schaltraumabdeckung 5 aufgesetzt werden und durch Auseinanderspreizen der Randstege 41 über die seitlich vorstehenden Halteflansche 50 der Schaltraumabdeckung 5 geführt werden, bis die Rastnocken 42 der Einführhilfe 4 unter die an der Unterseite der Halteflansche 50 anliegenden Klemmscheiben 3 rasten. In dieser Position sind die Klemmschrauben 2 mit Klemmscheibe 3 während des Transportes rüttelsicher gehalten und die Klemmschrauben 2 gegen selbständiges Eindrehen gesichert. Bereits nach dem Aufsetzen der Schaltraumabdeckung 5 und Hochschrauben der Klemmschrauben 2, bis die Klemmscheibe unterhalb der Halteflansche 50 anliegt und der Schraubenkopf in dem Durchsteckloch 51 geführt ist, sind die Klemmschrauben 2 verliersicher gehalten. Bereits in diesem Montagezwischenstand ohne Einführhilfe 4 können die Klemmschrauben 2 mit Klemmscheibe 3 nicht mehr aus dem Schaltgerät 1 herausfallen. Auch bei der Demontage der Einführhilfe 4 können die Klemmschrauben nicht herausfallen.The assembly of the switching device 1 using the invention trained control room cover 5 and insertion aid 4 is explained with reference to FIG. 1. First be in the switching device 1 with the insertion aid 4 removed and the control room cover 5 screwed in the clamping screws 2 with clamping washers 3, and as far down as possible. After that the Control room cover 5 mounted on switchgear 1. After that the clamping screws 2 with the clamping washers 3 again turned up until the clamping washers are below the retaining flanges 50 rest on the control room cover 5 and the screw head 2a of the clamping screw through the through opening 51 of the holding flange 50 protrudes. Then the insertion aid 4 on the Control room cover 5 are put on and spread apart the edge webs 41 over the laterally protruding Holding flanges 50 of the control room cover 5 are guided until the locking cams 42 of the insertion aid 4 under the on the bottom of the holding flanges 50 engage the clamping disks 3. In this position, the clamping screws 2 with the clamping washer 3 Shake-proof during transport and the clamping screws 2 secured against independent screwing. Already after putting on the control room cover 5 and screwing it up the clamping screws 2 until the clamping disc is below the Holding flanges 50 abuts and the screw head in the through hole 51 is guided, the clamping screws 2 are captive held. Already in this intermediate assembly stand without Insertion aid 4 can use the clamping screws 2 with the clamping washer 3 no longer fall out of switching device 1. Even with the Disassembly of the insertion aid 4, the clamping screws can not fall out.

In Fig. 4 sind die beiden rechten Klemmschrauben 2 mit Klemmscheibe 3 sind im hochgedrehten montierten Zustand dargestellt, wobei der Kopf 2a der Klemmschraube hier nicht näher dargestellt. Die linken drei Klemmschrauben zeigen den Zustand, in dem die Klemmschraube ganz nach unten gedreht ist und die Klemmscheibe 3 beim Herunterdrehen durch elastisches Abspreizen des Rastnockens 42 nach außen aus der vorangehend beschriebenen fixierten Position bewegt ist. Dieses Eindrehen der Klemmschraube 2 nach unten ist jedoch nur gegen die Federkraft des Rastnockens 42 möglich, wobei diese Federkraft so bemessen ist, daß in diesem Zustand die Klemmschraube 2 sich nicht selbständig während des Transportes beim Rütteln eindrehen kann. In Fig. 5 sind auch die Festkontaktstücke 6 dargestellt, die mit einem Muttergewinde 6a zur Aufnahme der Klemmschraube 2 ausgestattet sind. Die Klemmschrauben 2 mit Klemmscheiben 3 sind im hochgedrehten vormontierten Zustand dargestellt, wobei die Klemmscheibe 3 zwischen Rastnocken 42 der Einführhilfe und dem Halteflansch der Schaltraumabdeckung 5 festgeklemmt ist. Nach dem Einstecken einer Leitung zwischen Festkontaktstück 6 und Klemmscheibe 3 kann dann die Klemmschraube 2 mittels eines durch die Durchgangsöffnung 40 der Einführhilfe 4 und Durchsteckloch 51 der Schaltraumabdeckung 5 in den Schraubenkopf 2a geführten Schraubendrehers in Pfeilrichtung M1 eingeschraubt werden, wobei durch die aufgebrachte Kraft in Pfeilrichtung M1 der Randsteg 41 mit Rastnocken 42 in Pfeilrichtung P1 elastisch nach außen abgespreizt wird, wodurch die Klemmscheibe 3 freigegeben wird und die Klemmschraube 2 nach unten gedreht werden kann, bis die Leitung befestigt ist. Der Abstand a der Rastnocken 42 von der Anlagefläche der Einführhilfe 4 am Schaltgerät 1 ist so bemessen, daß die Klemmscheibe 3 zwischen der Unterseite der Halteflansche 50 der Schaltraumabdeckung 5 (Fig. 3) und dem Rastnocken 42 gut einklemmbar ist. Entsprechend ist die Höhe auch des Raststeges 41 zu bemessen.In Fig. 4, the two right-hand clamping screws 2 with a clamping washer 3 are shown in the assembled state, the head 2a of the clamping screw not closer here shown. The left three clamping screws show that State in which the clamping screw is turned all the way down and the clamping disc 3 when rotating down by elastic Spread the locking cam 42 outwards from the previous one described fixed position is moved. This screwing in the clamping screw 2 down is only against the spring force of the locking cam 42 possible, this spring force so is dimensioned that in this state the clamping screw 2 itself do not screw in during shaking independently during transport can. 5 are also the fixed contact pieces 6 shown with a nut thread 6a for receiving the Clamping screw 2 are equipped. The clamping screws 2 with Clamping disks 3 are in the pre-assembled state shown, the clamping disc 3 between locking cams 42nd the insertion aid and the holding flange of the control room cover 5 is clamped. After inserting a cable between Fixed contact piece 6 and clamping disk 3 can then the clamping screw 2 by means of a through the opening 40 of the Insertion aid 4 and through hole 51 of the control room cover 5 in the screw head 2a screwdriver in the direction of the arrow M1 are screwed in, being applied by the Force in the direction of arrow M1 of the edge web 41 with locking cams 42 in Arrow direction P1 is elastically spread outwards, whereby the clamping disc 3 is released and the clamping screw 2 can be turned down until the line is attached. The distance a of the locking cams 42 from the contact surface the insertion aid 4 on the switching device 1 is dimensioned that the clamping disc 3 between the underside of the holding flanges 50 of the control room cover 5 (Fig. 3) and the locking cam 42 is easy to pinch. The height is also corresponding to dimension the locking web 41.

Claims (3)

  1. Electrical switching device having terminal screw security, having at least one terminal screw (2) with a clamping plate (3), having a number of fixed contact pieces (6) corresponding to the number of terminal screws (2), having an outer cover as an insertion aid (4) which is designed with through-holes (40), which are arranged coaxially with respect to the terminal screws (2), and with latching means (41) for latching onto the switching device (1), and having a latching stud (42), which is associated with each through-hole (40) and by means of which the terminal screw (2) is secured against being turned in on its own, characterized in that an inner cover is arranged underneath the insertion aid (4), as a switching area cover (5) which is designed with holding flanges (50) which extend on the edges, are associated with the terminal screws (2) and each have a push-through hole (51), which is arranged coaxially with respect to the terminal screws (2) and through-holes (40) and in which the terminal screws (2) are held captive in the screwed-up state, with the external diameter of the clamping plate (3) being greater than, and the diameter of the screwhead (2a) being less than, the diameter of the push-through hole (51), and in that the insertion aid (4) is designed, at the edge adjacent to the through-holes (40), with edge webs (41) which project downwards, can be spread apart in a sprung manner and engage over the holding flanges (50), and on the inside of which the latching studs are integrally formed such that they project, and in that each latching stud (42) is at a distance (a) from the plane in which the insertion aid (4) makes contact with the switching device (1) such that it latches under the clamping plate (3), which rests against the lower face of the holding flange (50) when the terminal screw (2) is in the screwed-up state.
  2. Electrical switching device according to Claim 1, characterized in that each terminal screw (2) has in each case one individually projecting associated holding flange (50) with a push-through hole (51).
  3. Electrical switching device according to one of Claims 1 or 2, characterized in that the latching stud (42) on the edge web (41) is associated centrally with each through-hole (40).
EP97905076A 1996-02-29 1997-02-22 Electrical switch with locking-screw securing device Expired - Lifetime EP0824757B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29603754U 1996-02-29
DE29603754U DE29603754U1 (en) 1996-02-29 1996-02-29 Electrical switching device with locking screw lock
PCT/EP1997/000857 WO1997032324A1 (en) 1996-02-29 1997-02-22 Electrical switch with locking-screw securing device

Publications (2)

Publication Number Publication Date
EP0824757A1 EP0824757A1 (en) 1998-02-25
EP0824757B1 true EP0824757B1 (en) 2002-04-17

Family

ID=8020326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97905076A Expired - Lifetime EP0824757B1 (en) 1996-02-29 1997-02-22 Electrical switch with locking-screw securing device

Country Status (4)

Country Link
EP (1) EP0824757B1 (en)
AT (1) ATE216532T1 (en)
DE (2) DE29603754U1 (en)
WO (1) WO1997032324A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI812795B (en) * 2019-10-09 2023-08-21 鴻海精密工業股份有限公司 Intelligent fool-proof device for locking screw

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29610330U1 (en) * 1996-06-12 1996-08-14 Siemens Ag Switchgear with screw-in protection
DE29703657U1 (en) * 1997-02-28 1997-04-24 Kloeckner Moeller Gmbh Terminal with screw locking
DE102009024867B4 (en) * 2009-06-09 2013-03-28 Abb Ag Installation switching device with terminal cover

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Publication number Priority date Publication date Assignee Title
DE2448111C3 (en) * 1974-10-09 1982-03-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Arrangement for connecting electrical lines to an electrical device
DE2715572C2 (en) * 1977-04-07 1985-11-14 Brown, Boveri & Cie Ag, 6800 Mannheim Screw locking
DE2732963C2 (en) * 1977-07-21 1982-10-21 Starkstrom Gummersbach GmbH, 5277 Marienheide Contactor
DE2909202C2 (en) * 1979-03-09 1983-04-28 Brown, Boveri & Cie Ag, 6800 Mannheim Cover and safety cap for clamping screws on electrical devices
FR2563947B1 (en) * 1984-05-02 1986-08-22 Alsthom Cgee PROTECTED TERMINAL CONNECTION ARRANGEMENT FOR ELECTRICAL EQUIPMENT
JP2725519B2 (en) * 1991-10-01 1998-03-11 三菱電機株式会社 Terminal block

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI812795B (en) * 2019-10-09 2023-08-21 鴻海精密工業股份有限公司 Intelligent fool-proof device for locking screw

Also Published As

Publication number Publication date
EP0824757A1 (en) 1998-02-25
DE29603754U1 (en) 1996-04-25
ATE216532T1 (en) 2002-05-15
WO1997032324A1 (en) 1997-09-04
DE59707018D1 (en) 2002-05-23

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