(12) Oversettelse av europeisk patentskrift

Transkript

1 (12) Oversettelse av europeisk patentskrift (11) NO/EP B1 (19) NO NORGE (51) Int Cl. B60M 1/24 ( ) Patentstyret (21) Oversettelse publisert (80) Dato for Den Europeiske Patentmyndighets publisering av det meddelte patentet (86) Europeisk søknadsnr (86) Europeisk innleveringsdag (87) Den europeiske søknadens Publiseringsdato (30) Prioritet , DE, (84) Utpekte stater AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (73) Innehaver Rail Power Systems GmbH, Garmischer Strasse 35, München, DE-Tyskland (72) Oppfinner Ruiz Garcia, Josè Francisco, Lauinger Str. 55, München, DE-Tyskland (74) Fullmektig Onsagers AS, Postboks 1813 Vika, 0123 OSLO, Norge (54) Benevnelse CARRIER FOR CONTACT WIRE (56) Anførte publikasjoner EP-A WO-A1-02/ DE-A DE-U

2 1 The invention relates to a conductor rail for overhead contact systems, and to an overhead contact system comprising conductor rails. To supply electrically operated rails with traction current, conductor rails are known in addition to overhead lines. The conductor rails are part of the overhead contact system. EP A2 discloses a conductor rail corresponding to the preamble of claim 1, which comprises a gantry support from which two tensioning arms extend, on which clamping brackets for receiving a contact wire are integrally formed. The tensioning arms and clamping arms enclose a cavity that receives straps for connecting the conductor rails. EP B1 describes a similar conductor rail that has substantially the same profile as the conductor rail known from EP A2. The two conductor rails mentioned above are characterised in that they comprise a planar gantry support, on the underside of which the downwardly pointing legs are formed, which legs merge into the clamping arms for receiving the contact wire. Although the known conductor rails have proven successful in practice, sagging of the conductor rails is a fundamental problem. To keep sagging to a minimum, the conductor rails should have as high a moment of inertia as possible with the lowest possible weight. In addition, the conductor rails should be able to be suspended on the brackets of the poles in as simple a manner as possible. The object of the invention is to provide a conductor rail that can be suspended on the brackets of the poles in a relatively simple manner and is also distinguished by a high moment of inertia while being lightweight. The object of the invention is also to provide an overhead contact system comprising conductor rails that are simple to install and have a high moment of inertia while being lightweight, so the conductor rails sag to a small extent. These objects are achieved according to the invention by the features of the independent claims. The dependent claims relate to advantageous embodiments of the invention.

3 2 The conductor rail according to the invention is characterised in that the carrier, which is the upper carrier when installed, comprises, on the upper side, a recess which extends in the longitudinal direction of the carrier and is undercut at the opposite longitudinal sides. The longitudinal recess in the carrier allows the conductor rails to be attached to the brackets of the overhead contact system by means of connecting elements that engage in the recesses to create an interlocking connection. This allows the conductor rails to be installed on the brackets rapidly and securely. In addition, by comparison with the known conductor rails, which have a planar upper carrier, the conductor rails having the specially formed upper carrier are distinguished by a high moment of inertia for the same weight. As a result, the sagging can be reduced or the longitudinal span can be increased. The conductor rail according to the invention thus not only makes installation simple, but also improves the overhead contact system per se. In a preferred embodiment, the recess extending in the longitudinal direction in the upper carrier is designed to receive the hook head of a hook head bolt with an exact fit, i.e. the recess is adapted to the shape of the head of the hook head bolt. The hook head bolt allows the conductor rail to be attached to the bracket in a particularly simple and inexpensive manner. Preferably, the hook head bolts are themselves screwed to profiles of the brackets. Preferably the profiles of the brackets are U-profiles to which the hook head bolts are attached. Instead of hook head bolts, however, it is also possible to use any other known connecting element by which an interlocking connection can be produced. The conductor rail is preferably calculated statically as a continuous carrier with a uniformly distributed linear load, the connecting elements being arranged at the points of contraflexure. Positioning the connecting elements in this way reduces the sagging of the conductor rail to a minimum. In a particularly preferred embodiment of the conductor rail, the upper carrier comprises a lower profile piece which interconnects the upper ends of the two downwardly pointing legs, wherein upwardly extending legs, on which upper arms that protrude on either side are formed, are connected to the ends of the lower profile piece so as to form the recess undercut at the opposite longitudinal sides.

4 3 The two upper arms allow the conductor rail to be attached to the bracket not only using connecting elements that engage in the recesses, but also using clamping elements that act on the side arms. Therefore, the conductor rail according to the invention can be used in all applications. In another particularly preferred embodiment, lower arms that protrude on either side are integrally formed on the two legs in the transition region to the clamping arms. The particular design of the upper carrier having the longitudinal recess and the upper arms protruding at the side, in conjunction with the two legs and clamping arms and the lower arms protruding at the side, creates a sufficiently rigid profile in the longitudinal direction that clampingly receives and securely holds the contact wire. In the following, an embodiment of the invention will be explained in more detail with reference to the drawings, in which: Fig. 1 is a sectional view of an embodiment of the conductor rail according to the invention, together with a first embodiment of the connecting element according to the invention for attaching the conductor rail to a bracket, a connecting piece being inserted into the conductor rail in order to interconnect the conductor rails, Fig. 2 is a sectional view of the conductor rail from Fig. 1, together with a second embodiment of the connecting element for attaching the conductor rail to a bracket, Fig. 2.1 is a partial view of the conductor rail from Fig. 1, together with a third embodiment of the connecting element for attaching the conductor rail to a bracket, Fig. 3 is a side view of a portion of the conductor rail from Fig. 1, and Fig. 4 shows an embodiment of the overhead contact system according to the invention comprising the conductor rail according to the invention. In the following, the conductor rail will be described in the installed position, in which the conductor rail is attached to a bracket in a suspended manner. The conductor rail 1 comprises a carrier 2, which is the upper carrier when in the installed position. On its upper

5 4 side, the upper carrier 2 comprises a recess 3 that extends in the longitudinal direction of the carrier and is undercut at the two opposite longitudinal sides 4, 5. The longitudinal recess 3 comprising the undercuts 6, 7 is designed such that the hook head 9 of a hook head bolt 8 can be inserted into the recess with an exact fit. The width and height of the recess 3 are thus adapted to the dimensions of the hook head of conventional hook head bolts, the contour of the undercuts 6, 7 corresponding to the contour of the hooks of the hook head of the hook head bolts. Fig. 1 shows the conductor rail 1 together with the hook head bolt 8, the hook head 9 of which is located in the recess 3. The conductor rail 1 is attached to the hook head bolt 8 by the nut 8A of the hook head bolt 8 being screwed down. The upper carrier 2 of the conductor rail 1 comprises a lower profile piece 10, to the ends of which upwardly extending legs 11, 12 are connected so as to form the undercut recess 3. Upper arms 13, 14 that protrude on either side are integrally formed on the two upper legs 11, 12. In this embodiment, the upper leg 3 has a width of 85 mm and a thickness b of 27.5 mm. The thickness c of the lower profile piece 10 of the carrier 2 is 7 mm in this embodiment. In the process, the width d of the conductor rail is 130 mm. Legs 15, 16, which extend downwards on either side and of which the cross section reduces downwards, are connected to the lower profile piece 10 of the upper carrier 2. The lower ends of the two legs 15, 16 merge into inwardly extending clamping arms 17, 18, which clampingly receive the contact wire (not shown). By means of the two upper legs 15, 16 and the clamping arms 17, 18, the upper carrier 2 encloses a cavity 19 for receiving two connecting pieces 20, 21, by which the individual conductor rails are interconnected. The connecting pieces 20, 21 are bolted together by bolts (not shown) that extend through holes 22, 23 in the legs 15, 16. In the transition region to the clamping arms 17, 18 lower arms 24, 25 that protrude downwards on either side are integrally formed on the legs 15, 16 of the conductor rail 1. The conductor rail according to the invention can be attached not only using the hook head bolt 8 shown in Fig. 1, but also using other connecting elements. Fig. 2 shows an alternative

6 5 connecting element for attaching the conductor rail. In the alternative embodiment, the conductor rail is attached by a clamping device 26 that acts on the sides of the upper arms 13, 14. The clamping device 26 comprises a clamping plate 27, to the underside of which the upper arms 13, 14 of the conductor rail 1 are attached clamping parts 28, 29 that engage from below. The clamping parts 28, 29 can, for example, be bolted to the clamping plate 27 in order to clampingly hold the upper arms 13, 14. The clamping plate 27 itself can in turn be attached to the bracket by a bolt 30. The conductor rail 1 thus enables attachment not only by means of a hook head screw 8, but also by means of a clamping device 26 to which the conductor rail is rigidly attached by clamping parts 28, 29. However, attachment using the clamping device 26 is not the preferred embodiment that allows for particularly simple and rapid installation. Instead of the clamping device 26, the conductor rail can also be attached by the clamping device shown in Fig. 2.1, which provides for sliding attachment of the conductor rail by means of the clamping parts 28A and 28B. Fig. 4 shows a part of an overhead contact system, in which the conductor rail 1 is attached to a bracket 31, which in turn is attached to the roof of a tunnel. The bracket 31 comprises a vertical arm 31A, which is attached to the roof, and a horizontal arm 31B, to which a U- profile 31D is attached by means of an insulator 31C. The hook head bolt 8 is bolted to the U-profile 31D, and the conductor rail 1 is in turn attached to the hook head bolt 1. The hook head bolts 8 for attaching the conductor rails 1 are arranged along the track at the points of contraflexure of the individual conductor rails, and so the sagging of the conductor rails is reduced to a minimum.

7 1 PATENTKRAV Strømskinne omfattende en bærer (2) som er plassert på toppen når den foreligger i installasjonsposisjonen og til hvilken to nedad rettede ben (15, 16) er forbundet, hvilke ben går over i innad utstrakte klemmende armer (17, 18) for mottak av en kontaktledning, der den øvre bæreren (2), de to bena (15, 16) og de klemmende armene (17, 18) omgir et mellomliggende rom (19) for mottak av koblingsstykker (20, 21), karakterisert ved at den øvre bæreren (2) omfatter, på den øvre siden, en utsparing (3) som strekker seg i den langsgående retningen av bæreren og er underskjært ved de motstående langsgående sidene (11, 12). 2. Strømskinne ifølge krav 1, karakterisert ved at utsparingen (3) i den øvre bæreren (2), som strekker seg i den langsgående retningen, er utformet for å motta krokhodet (9) på en krokhodebolt (8) på en tilpasset måte. 3. Strømskinne ifølge krav 1 eller krav 2, karakterisert ved at den øvre bæreren (2) omfatter en nedre profildel (10) som forbinder de øvre endene av de to bena (15, 16), der oppad utstrakte ben (11, 12) er forbundet til endene av den nedre profildelen (10) for slik å danne utsparingen (3) som er underskjært på de motstående langsgående sidene, på hvilke oppad utstrakte øvre armer (13, 14) er utformet, utstikkende ved hver side. 4. Strømskinne ifølge hvilket som helst av kravene 1 til 3, karakterisert ved at nedre armer (24, 25), som stikker ut ved hver side, er utformet på bena (15, 16) i overgangsregionen til de klemmende armene (17, 18). 5. Kjøreledningssystem omfattende utliggere på hvilke strømskinner (1) ifølge hvilket som helst av kravene 1 til 4 henger fra. 6. Kjøreledningssystem ifølge krav 1, karakterisert ved at strømskinnene (1) er festet til utliggerne (31) ved hjelp av koblingselementer (8, 30) som griper inn i utsparingene (3) av strømskinnene (1) som strekker seg i den langsgående retningen av strømskinnene. 7. Kjøreledningssystem ifølge krav 6, karakterisert ved at koblingselementene (8, 30) er anbrakt på nullmomentpunktene av strømskinnene (1).

8 2 8. Kjøreledningssystem ifølge krav 6 eller krav 7, karakterisert ved at koblingselementene er krokhodebolter (8) Kjøreledningssystem ifølge krav 8, karakterisert ved at krokhodeboltene (8) er skrudd til profiler (31C) av utliggerne (31). 10. Kjøreledningssystem ifølge krav 9, karakterisert ved at profilene (31C) på utliggerne (31) er U-formede profiler.

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