EP0694221B1 - A power take-off adaptor for a conductor rail - Google Patents

A power take-off adaptor for a conductor rail Download PDF

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Publication number
EP0694221B1
EP0694221B1 EP94911974A EP94911974A EP0694221B1 EP 0694221 B1 EP0694221 B1 EP 0694221B1 EP 94911974 A EP94911974 A EP 94911974A EP 94911974 A EP94911974 A EP 94911974A EP 0694221 B1 EP0694221 B1 EP 0694221B1
Authority
EP
European Patent Office
Prior art keywords
locking
frame
switching
fingers
adaptor
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
EP94911974A
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German (de)
French (fr)
Other versions
EP0694221A1 (en
Inventor
Eero Nieminen
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.)
Nordic Aluminium Oyj
Original Assignee
Nordic Aluminium Oyj
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Filing date
Publication date
Application filed by Nordic Aluminium Oyj filed Critical Nordic Aluminium Oyj
Publication of EP0694221A1 publication Critical patent/EP0694221A1/en
Application granted granted Critical
Publication of EP0694221B1 publication Critical patent/EP0694221B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/14—Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length
    • H01R25/142—Their counterparts

Definitions

  • the present invention relates to a power take-off adaptor for a conductor rail having a longitudinal switching channel and longitudinal current conductors, whereby the adaptor comprises
  • the latch In the locking position the latch prevents both the locking fingers of the adaptor from moving to a protruding position so as to make contact with the conductor rail and the contact fingers from moving to a protruding position to make contact with the current conductors of the conductor rail. Only when the cam has pushed the latch to the disengaged position can both of these actions be carried out.
  • the locking construction calls for two separate movable locking elements and two springs in order to operate in the desired manner.
  • other kinds of locking constructions have been developed, all of which are comprised of at least one separate movable locking element, such as a lever, bar, catch or the like, and a spring actuating the locking element.
  • the known adaptors therefore have the major drawback that, in the first place, separate components must be manufactured for the locking construction and, secondly, the components of the locking construction require their own assembly stage. The construction of the adaptor is thus rendered complicated and its assembly becomes more difficult.
  • GB-A-2140983 discloses a power take-off adaptor for a conductor rail having a longitudinal switching channel and longitudinal current conductors.
  • the adaptor comprises a box-like frame forming a protruding switching member that can be inserted into the switching channel and a group of locking fingers and contact fingers (16, 17, 18) position in the frame.
  • a switching means mounted in the frame is movable between a switching position, in which the switching means moves the fingers to a contact position in which the fingers protrude from the switching member, and a locking position, in which the switching means moves the fingers to a disengaged position in which the fingers are retracted within the switching member.
  • the adaptor further comprises locking means comprising one locking element formed as an integral part of the switching means and another locking element formed as an integral part of the frame.
  • the locking elements lock the switching means stationary with respect to the frame and are movable one with respect to the other by means of the conductor rail, to a position unlocking the movement of the switching means, when one of the locking elements touches the conductor rail.
  • One of the locking elements is a slot formed in the switching means and the other locking element is a flexible tab formed in the frame. The flexible tab extends flexibly int the slot and when pressed against the conductor rail, flexes free from its engagement with the slot.
  • the object of the present invention is to provide a power take-off adaptor which avoids the above-mentioned drawbacks and is simpler than previous adaptors in terms of its construction and its assembly.
  • a power take-off adaptor for a conductor rail having a longitudinal switching channel and longitudinal current conductors
  • the adaptor comprises a box-like frame forming a protruding switching member that can be inserted into the switching channel, a group of locking fingers and contact fingers positioned in the frame, a switching means mounted in the frame movably between a switching position, in which the switching means moves the fingers to a contact position in which the fingers protrude from the switching member, and a locking position, in which the switching means moves the fingers to a disengaged position in which the fingers are retracted within the switching member, and a locking means comprising one locking element formed in the switching means and another locking element formed as an integral part of the frame, which locking elements lock the switching means stationary in respect of the frame and which are movable in respect of each other by means of the conductor rail to a position unlocking the movement of the switching means when one of the locking elements touches the conductor rail, characterised in that one of the locking elements is a first flexible
  • both locking element are formed as an integral part of the elements supporting them (the frame or the switching means) and that at least one of the locking elements is formed in such a way that through the action of an external force (the conductor rail) the locking element can move from one position (the locking position) to another position (the disengaged position).
  • This allows the locking element to be manufactured in conjunction with manufacture of the element supporting the locking element, thus obviating the need to manufacture discrete locking components separately.
  • a separate stage for assembling the locking means is not required, either.
  • the power take-off adaptor shown in Figures 1-3 of the drawings comprises a box-like frame 1 having a switching member 3 that can be inserted into a conductor rail 2 shown in Figure 3, and a first switching shaft 4 that is pivotally mounted with bearings in the frame as well as a second connecting shaft 5 that is mounted with bearings in the frame.
  • the switching shaft is provided with two locking fingers 6 and one contact finger 7, whereas the connecting shaft is provided with two locking fingers 6 and two contact fingers 7.
  • the shafts are connected to each other so as to rotate in sync between a switching position, in which the locking fingers and contact fingers have moved to a position protruding from the switching member, and a locking position, in which the fingers have moved to a disengaged position retracted within the switching member.
  • the switching shaft is for this purpose provided with a crank 8 which protrudes from the frame and can be moved from a disengaged position shown in Figures 1-4 to a switching position shown with broken lines in Figure 2.
  • the contact finger 7 of the connecting shaft can be turned by means of a selector knob 9, which is mounted with bearings to the switching shaft, so that the contact finger extends to the desired side of the frame at any given time depending on the desired phase connection.
  • the construction and operation of the adaptor correspond in principle to the adaptor described in Finnish Patent Specification 84,305 and, therefore, the operation of the adaptor will not be described in greater detail in this connection.
  • the adaptor is also provided with a locking means 10 in order to lock the switching shaft 4 into said disengaged position.
  • the locking means comprises a flexible opening tab 11 in the frame and a flexible retainer tab 12 in the switching shaft.
  • the opening tab is formed in a part 1a of the frame which, when the adaptor is pushed into the conductor rail, presses against an edge 13a of a longitudinal channel 13 of the conductor rail, as shown in Figure 3.
  • the opening tab 11 is formed as an integral part of the frame so that the tab extends outside the surface of said part la of the frame when the opening tab is not actuated, i.e., when the adaptor has been disengaged from the conductor rail but is pressed in level with this surface when the adaptor is pushed into the conductor rail and said part la of the frame is pressed against the edge 13a of the longitudinal channel.
  • the retainer tab 12 is formed as an integral part of a flange 4a of the switching shaft in such a way that the tab rises into engagement with an abutment 14 in said part la of the frame when the retainer tab is not actuated, i.e., when the switching shaft has been moved to the disengaged position by means of the cam 8 in order to connect the adaptor to the conductor rail or to disengage it from the rail.
  • the opening tab and the retainer tab are arranged to lie one above the other in this disengaged position in such a way that the retainer tab is able to snap in place behind the abutment 14 and to seat under the opening tab.
  • the opening tab 11 When the adaptor is inserted into the conductor rail and the edge 13a of its longitudinal channel is positioned against the part la of the frame of the adaptor, the opening tab 11 is pressed in level with this part and at the same time presses the retainer tab 12 towards the cam so that the retainer tab is released from engagement with the abutment 14 of the frame, Figure 5B.
  • the switching shaft is thus released from its locked state and can be moved, by turning the crank, to the switching position in which the adaptor is seated firmly in the conductor rail and the contact fingers come into contact with its current conductors 15.
  • the switching shaft When the adaptor is to be removed from the conductor rail, the switching shaft is turned by the crank back to the locking position such that the adaptor is disengaged from engagement with the conductor rail and can be pulled out of the channel of the conductor rail.
  • the opening tab 11 is able to flex back to its original position and the retainer tab 12, thanks to its flexibility, snaps into engagement with the abutment 14 of the frame such that the switching shaft becomes unpivotally locked to the frame, Figure 5A.

Abstract

A power take-off adaptor for a conductor rail, comprising a box-like frame (1) provided with a group of locking fingers and contact fingers (6, 7) and a switching means (4) which moves the fingers from a disengaged position retracted within the frame to a switching position protruding from the frame as well as locking elements (11, 12) for locking the switching means into the disengaged position and to release the switching means when the adaptor has been inserted into place in the conductor rail. In order to simplify the manufacture and assembly of the adaptor, the locking elements are formed as integral parts of the switching means and the frame.

Description

The present invention relates to a power take-off adaptor for a conductor rail having a longitudinal switching channel and longitudinal current conductors, whereby the adaptor comprises
  • a box-like frame forming a protruding switching member that can be inserted into the switching channel,
  • a group of locking fingers and contact fingers positioned in the frame,
  • a switching means mounted in the frame movably between a switching position, in which the switching means moves the fingers to a contact position in which the fingers protrude from the switching member, and a locking position, in which the switching means moves the fingers to a disengaged position in which the fingers are retracted within the switching member, and
  • a locking means comprising locking elements positioned in the frame and in the switching means, which locking elements lock the switching means stationary in respect of the frame and which are movable in respect of each other by means of the conductor rail to a position unlocking the movement of the switching means when one of the locking elements touches the conductor rail.
Conductor rail systems of this type are today used quite commonly in various rooms to connect lighting equipment, small machines and the like to a power source by means of a power take-off adaptor. Both various adaptors and various conductor rails have been developed and certain adaptor constructions have been presented in Finnish Patent Specifications 47,236 and 84,305, German Offenlegungsschrift 2,810,681 and US Patent Specification 3,960,426.
In order to ensure that the power take-off adaptor has been placed securely in its correct position in the conductor rail before the contact fingers can be moved to make contact with the current conductors of the conductor rail, various locking constructions have been designed for the adaptors. One locking construction has been disclosed in the above-mentioned Finnish Patent Specification 47,236. It has a latch that is mounted in the switching member of the frame of the adaptor and a retainer part that cooperates with the latch. The latch has a cam which protrudes from the switching member of the adaptor and which is intended to make contact with the bottom of the conductor rail and to push the latch from a locking position to a disengaged position when the adaptor has been pushed into place in the longitudinal channel of the conductor rail. In the locking position the latch prevents both the locking fingers of the adaptor from moving to a protruding position so as to make contact with the conductor rail and the contact fingers from moving to a protruding position to make contact with the current conductors of the conductor rail. Only when the cam has pushed the latch to the disengaged position can both of these actions be carried out.
In this known construction the locking construction calls for two separate movable locking elements and two springs in order to operate in the desired manner. To provide the same kind of locking effect, other kinds of locking constructions have been developed, all of which are comprised of at least one separate movable locking element, such as a lever, bar, catch or the like, and a spring actuating the locking element. The known adaptors therefore have the major drawback that, in the first place, separate components must be manufactured for the locking construction and, secondly, the components of the locking construction require their own assembly stage. The construction of the adaptor is thus rendered complicated and its assembly becomes more difficult.
GB-A-2140983 discloses a power take-off adaptor for a conductor rail having a longitudinal switching channel and longitudinal current conductors. The adaptor comprises a box-like frame forming a protruding switching member that can be inserted into the switching channel and a group of locking fingers and contact fingers (16, 17, 18) position in the frame. A switching means mounted in the frame is movable between a switching position, in which the switching means moves the fingers to a contact position in which the fingers protrude from the switching member, and a locking position, in which the switching means moves the fingers to a disengaged position in which the fingers are retracted within the switching member. The adaptor further comprises locking means comprising one locking element formed as an integral part of the switching means and another locking element formed as an integral part of the frame. The locking elements lock the switching means stationary with respect to the frame and are movable one with respect to the other by means of the conductor rail, to a position unlocking the movement of the switching means, when one of the locking elements touches the conductor rail. One of the locking elements is a slot formed in the switching means and the other locking element is a flexible tab formed in the frame. The flexible tab extends flexibly int the slot and when pressed against the conductor rail, flexes free from its engagement with the slot.
The object of the present invention is to provide a power take-off adaptor which avoids the above-mentioned drawbacks and is simpler than previous adaptors in terms of its construction and its assembly.
According to the invention, there is provided a power take-off adaptor for a conductor rail having a longitudinal switching channel and longitudinal current conductors, whereby the adaptor comprises a box-like frame forming a protruding switching member that can be inserted into the switching channel, a group of locking fingers and contact fingers positioned in the frame, a switching means mounted in the frame movably between a switching position, in which the switching means moves the fingers to a contact position in which the fingers protrude from the switching member, and a locking position, in which the switching means moves the fingers to a disengaged position in which the fingers are retracted within the switching member, and a locking means comprising one locking element formed in the switching means and another locking element formed as an integral part of the frame, which locking elements lock the switching means stationary in respect of the frame and which are movable in respect of each other by means of the conductor rail to a position unlocking the movement of the switching means when one of the locking elements touches the conductor rail, characterised in that one of the locking elements is a first flexible tab formed in the switching means and positioned in engagement with an abutment formed in the frame in the locking position of the switching means and the other locking element is a second flexible tab formed in the frame in such a position with respect to the first tab that the second tab, when pressed against the conductor rail, flexibly displaces the first tab to flex free from its engagement with the abutment.
The basic idea of the invention is that both locking element are formed as an integral part of the elements supporting them (the frame or the switching means) and that at least one of the locking elements is formed in such a way that through the action of an external force (the conductor rail) the locking element can move from one position (the locking position) to another position (the disengaged position). This allows the locking element to be manufactured in conjunction with manufacture of the element supporting the locking element, thus obviating the need to manufacture discrete locking components separately. When the adaptor is assembled, a separate stage for assembling the locking means is not required, either.
In the following the invention will be described in greater detail with reference to the accompanying drawings, in which
  • Figure 1 shows a perspective view of a preferred embodiment of a power take-off adaptor according to the invention,
  • Figures 2 and 3 show a side view and an end view of the adaptor with locking means, the adaptor having been inserted into a conductor rail,
  • Figure 4 shows a perspective view of the switching means of the adaptor,
  • Figures 5A and 5B show, on a larger scale, a side view of the adaptor's locking means in a disengaged position and, similarly, in a locking position.
    • The power take-off adaptor shown in Figures 1-3 of the drawings comprises a box-like frame 1 having a switching member 3 that can be inserted into a conductor rail 2 shown in Figure 3, and a first switching shaft 4 that is pivotally mounted with bearings in the frame as well as a second connecting shaft 5 that is mounted with bearings in the frame. The switching shaft is provided with two locking fingers 6 and one contact finger 7, whereas the connecting shaft is provided with two locking fingers 6 and two contact fingers 7. The shafts are connected to each other so as to rotate in sync between a switching position, in which the locking fingers and contact fingers have moved to a position protruding from the switching member, and a locking position, in which the fingers have moved to a disengaged position retracted within the switching member. The switching shaft is for this purpose provided with a crank 8 which protrudes from the frame and can be moved from a disengaged position shown in Figures 1-4 to a switching position shown with broken lines in Figure 2. The contact finger 7 of the connecting shaft can be turned by means of a selector knob 9, which is mounted with bearings to the switching shaft, so that the contact finger extends to the desired side of the frame at any given time depending on the desired phase connection. The construction and operation of the adaptor correspond in principle to the adaptor described in Finnish Patent Specification 84,305 and, therefore, the operation of the adaptor will not be described in greater detail in this connection.
    The adaptor is also provided with a locking means 10 in order to lock the switching shaft 4 into said disengaged position. The locking means comprises a flexible opening tab 11 in the frame and a flexible retainer tab 12 in the switching shaft. The opening tab is formed in a part 1a of the frame which, when the adaptor is pushed into the conductor rail, presses against an edge 13a of a longitudinal channel 13 of the conductor rail, as shown in Figure 3.
    The opening tab 11 is formed as an integral part of the frame so that the tab extends outside the surface of said part la of the frame when the opening tab is not actuated, i.e., when the adaptor has been disengaged from the conductor rail but is pressed in level with this surface when the adaptor is pushed into the conductor rail and said part la of the frame is pressed against the edge 13a of the longitudinal channel.
    The retainer tab 12 is formed as an integral part of a flange 4a of the switching shaft in such a way that the tab rises into engagement with an abutment 14 in said part la of the frame when the retainer tab is not actuated, i.e., when the switching shaft has been moved to the disengaged position by means of the cam 8 in order to connect the adaptor to the conductor rail or to disengage it from the rail. The opening tab and the retainer tab are arranged to lie one above the other in this disengaged position in such a way that the retainer tab is able to snap in place behind the abutment 14 and to seat under the opening tab.
    When the adaptor is inserted into the conductor rail and the edge 13a of its longitudinal channel is positioned against the part la of the frame of the adaptor, the opening tab 11 is pressed in level with this part and at the same time presses the retainer tab 12 towards the cam so that the retainer tab is released from engagement with the abutment 14 of the frame, Figure 5B. The switching shaft is thus released from its locked state and can be moved, by turning the crank, to the switching position in which the adaptor is seated firmly in the conductor rail and the contact fingers come into contact with its current conductors 15.
    When the adaptor is to be removed from the conductor rail, the switching shaft is turned by the crank back to the locking position such that the adaptor is disengaged from engagement with the conductor rail and can be pulled out of the channel of the conductor rail. In this case, the opening tab 11 is able to flex back to its original position and the retainer tab 12, thanks to its flexibility, snaps into engagement with the abutment 14 of the frame such that the switching shaft becomes unpivotally locked to the frame, Figure 5A.
    It is to be noted that no separate parts need be manufactured for the locking means 10, the necessary locking elements being formed during the manufacture of the frame and the switching means. Nor is any special assembly stage required for the locking means, since instead the locking elements assume their correct positions during the assembly of the frame and the switching means.
    The Figures and the description relating thereto are intended only to illustrate the idea of the invention. In its details, the adaptor according to the invention can vary within the scope of the claims. The invention can also be applied to adaptors in which the construction for displacing the locking fingers and contact fingers is different from what has been described above and shown in the drawings.

    Claims (1)

    1. A power take-off adaptor for a conductor rail (2) having a longitudinal switching channel (13) and longitudinal current conductors (15), whereby the adaptor comprises
      a box-like frame (1) forming a protruding switching member (3) that can be inserted into the switching channel,
      a group of locking fingers and contact fingers (6, 7) positioned in the frame,
      a switching means (4) mounted in the frame movably between a switching position, in which the switching means moves the fingers to a contact position in which the fingers protrude from the switching member, and a locking position, in which the switching means moves the fingers to a disengaged position in which the fingers are retracted within the switching member, and
      a locking means (10), comprising one locking element (12) formed in the switching means (4) and another locking element (14) formed as an integral part of the frame (1), which locking elements lock the switching means stationary in respect of the frame and which are movable in respect of each other by means of the conductor rail to a position unlocking the movement of the switching means when one of the locking elements touches the conducter rail, characterized in that one of the locking elements is a first flexible tab (12) formed in the switching means (4) and positioned in engagement with an abutment (14) formed in the frame in the locking position of the switching means (4) and the other locking element is a second flexible tab (11) formed in the frame (1) in such a position with respect to the first tab (12) that the second tab (11), when pressed against the conductor rail (2), flexibly displaces the first tab (12) to flex free from its engagement with the abutment (14).
    EP94911974A 1993-04-16 1994-04-14 A power take-off adaptor for a conductor rail Expired - Lifetime EP0694221B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FI931743A FI92635C (en) 1993-04-16 1993-04-16 Power outlet for a contact rail
    FI931743 1993-04-16
    PCT/FI1994/000141 WO1994024731A1 (en) 1993-04-16 1994-04-14 A power take-off adaptor for a conductor rail

    Publications (2)

    Publication Number Publication Date
    EP0694221A1 EP0694221A1 (en) 1996-01-31
    EP0694221B1 true EP0694221B1 (en) 1998-07-22

    Family

    ID=8537757

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP94911974A Expired - Lifetime EP0694221B1 (en) 1993-04-16 1994-04-14 A power take-off adaptor for a conductor rail

    Country Status (5)

    Country Link
    EP (1) EP0694221B1 (en)
    AU (1) AU6431194A (en)
    DE (1) DE69411904T2 (en)
    FI (1) FI92635C (en)
    WO (1) WO1994024731A1 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO1998053533A1 (en) * 1997-05-22 1998-11-26 Harald Widell Safety device at connectors to electric current rails, installation channels and the like

    Families Citing this family (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FI100370B (en) * 1996-03-13 1997-11-14 Nordic Aluminium Oyj Power outlet for a contact rail
    FI101756B (en) * 1996-03-13 1998-08-14 Nordic Aluminium Oyj Current collector for contact rail
    US6089884A (en) * 1997-07-10 2000-07-18 Dal Partnership Track lighting system
    DE10312012A1 (en) * 2003-03-18 2004-11-04 Erco Leuchten Gmbh Busbar adapter
    AU2003904362A0 (en) * 2003-08-18 2003-08-28 Sinclair, John Electrical plug and flexible rail
    DE102012007084B4 (en) * 2012-04-11 2014-04-24 Hoffmeister Leuchten Gmbh adapter
    DE202013101777U1 (en) * 2013-04-24 2014-07-28 Zumtobel Lighting Gmbh DIN rail for the formation of a lighting system and trunking system
    US9379502B2 (en) 2014-02-14 2016-06-28 Universal Electric Corporation Tool-less busway take-off device for electrical busway and method of installing
    DE202014104800U1 (en) 2014-10-07 2016-01-11 Zumtobel Lighting Gmbh LED luminaire with adjustable holding element and arrangement for emitting light with such an LED luminaire
    WO2019071266A1 (en) 2017-10-06 2019-04-11 Power Distribution, Inc. Universal tap-off box

    Family Cites Families (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    IT8321669V0 (en) * 1983-04-28 1983-04-28 Profilux Srl STRUCTURE OF BIPOLAR ADAPTER FOR MULTIPOLAR ELECTRIC LINES OF THE ARMORED TYPE, PART OF INSTALLATIONS FOR INTERIOR LIGHTING.

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO1998053533A1 (en) * 1997-05-22 1998-11-26 Harald Widell Safety device at connectors to electric current rails, installation channels and the like

    Also Published As

    Publication number Publication date
    DE69411904T2 (en) 1999-02-18
    EP0694221A1 (en) 1996-01-31
    DE69411904D1 (en) 1998-08-27
    WO1994024731A1 (en) 1994-10-27
    FI92635B (en) 1994-08-31
    FI931743A0 (en) 1993-04-16
    AU6431194A (en) 1994-11-08
    FI92635C (en) 1994-12-12

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