EP0855484B1 - Länglicher, rohrförmiger Hohlmast - Google Patents

Länglicher, rohrförmiger Hohlmast Download PDF

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Publication number
EP0855484B1
EP0855484B1 EP19970310696 EP97310696A EP0855484B1 EP 0855484 B1 EP0855484 B1 EP 0855484B1 EP 19970310696 EP19970310696 EP 19970310696 EP 97310696 A EP97310696 A EP 97310696A EP 0855484 B1 EP0855484 B1 EP 0855484B1
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EP
European Patent Office
Prior art keywords
mast
reinforcing member
rib structure
opening
reinforcing
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
EP19970310696
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English (en)
French (fr)
Other versions
EP0855484A1 (de
Inventor
Hendrik Jakobus Van Der Steen
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.)
Hunter Douglas Industries BV
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Hunter Douglas Industries BV
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Filing date
Publication date
Application filed by Hunter Douglas Industries BV filed Critical Hunter Douglas Industries BV
Priority to EP19970310696 priority Critical patent/EP0855484B1/de
Publication of EP0855484A1 publication Critical patent/EP0855484A1/de
Application granted granted Critical
Publication of EP0855484B1 publication Critical patent/EP0855484B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/003—Access covers or locks therefor

Definitions

  • This invention relates to an elongate hollow tubular mast comprising: a tubular wall having a longitudinal section that includes a first opening giving access to an interior space of the mast; and a tubular reinforcing member that is fixedly attached to an inner surface of the outer wall bordering its first opening, said reinforcing member including a second opening in registration with the first opening to provide an access opening in the mast to its interior space.
  • Such masts are commonly used to support lighting fixtures and signs along roadsides and on man-made structured such as bridges. Such masts can also be used as flag poles and as columns to support various overhead structures. Such masts are further found on ships.
  • NL-A- 7 908 623 upon which the precharacterising portion of appended claim 1 is based, describes an elongate hollow tubular mast having a first opening and a tubular reinforcing member on the inside of the mast with a second opening in registration with the first opening.
  • EP-A- 0 414 284 discloses a polygon lamp standard with an access opening and cover.
  • the wall parts of the lamp standard adjoining the side edges of the opening are made thicker so as to increase the strength in that area.
  • inwardly directed strips are provided which together form a rail for fitting connection equipment and fuse boxes.
  • An object of this invention is therefore to strengthen further the known elongate hollow tubular mast.
  • an elongate hollow tubular mast comprising a tubular wall having a longitudinal section that includes a first opening giving access to an interior space of said mast and a tubular reinforcing member fixedly attached to an inner surface of said wall bordering said first opening, said reinforcing member being substantially shorter than the length of the mast and including a second opening in registration with said first opening to provide an access opening in said mast to said interior space, characterised in that an integrally formed, longitudinally elongate, first reinforcing rib structure projects radially from an inner surface of said reinforcing member and is generally opposite said access opening; and the reinforcing member also comprises an, integrally formed, longitudinally elongate, second reinforcing rib structure extending longitudinally above and below the second opening and projecting radially from an inner surface of said reinforcing member parallel to, and circumferentially spaced from, said first reinforcing rib structure, said second reinforcing rib structure being diametrically opposite said first
  • the first reinforcing rib structure is formed so as to provide a mounting rail for accessory components to be fitted in the interior space of the mast.
  • accessory components such as fuse boxes and rope or cable clamps
  • the first reinforcing rib structure is provided with an undercut groove that can accept fastener elements, such as bolts, for mounting of accessory components.
  • an undercut groove is preferably provided by forming the first reinforcing rib structure, in cross-section in the reinforcing member, as a pair of radially symmetrical L-shaped legs.
  • the second reinforcing rib structure still further increase the strength of the reinforcing member, provides further means for attaching accessories to the interior of the mast and improves the manufacture of the mast.
  • the second reinforcing rib structure is advantageously identical in cross section to the first reinforcing rib structure.
  • the rib structure(s) of this invention allow the behaviour of the reinforcing member to be advantageously controlled during its expansion within the first longitudinal section of the mast.
  • a non-uniform structure such as a hollow mast with a first opening cut in its tubular wall expands
  • the structure has a tendency to bend longitudinally, whereby it deflects laterally.
  • Such a bending tendency can be in addition to, or compensate for, another bending tendency that occurs during expansion of the mast's reinforcing member.
  • a reinforcing member can be made that has a neutral behaviour during such expansion of the reinforcing member in the mast according to GB 1413334, and also, the reinforcing member can be symmetrically shaped so that the position, in which it is inserted in the mast, is less critical.
  • the second reinforcing rib structure is intersected by the mast's access opening which is closed by a cover or lid, and a latch on the cover advantageously engages the front rib. This provides additional lateral fixing of the access door cover, which is desirable in areas prone to vandalism of such masts.
  • Two further rib structures may be positioned at opposite lateral sides of the access opening. With such further rib structures, additional reinforcement of the tubular reinforcing member can be obtained along the lateral sides of the access opening and circumferentially beyond the opening.
  • the tubular reinforcing member can advantageously be attached to the inner surface of the tubular longitudinal section by an interference fit.
  • the reinforcing member can be attached to the inner surface of the longitudinal section by means of an adhesive material.
  • FIGS 1-4 show an elongate hollow tubular metal mast 1 suitable, for example, as a lighting pole or as a flag pole.
  • a lower end 2 of the mast 1 is buried in the ground 3.
  • the lower end 2 could also take the form of a pedestal mounted on a man-made structure such as a bridge or viaduct.
  • a cable entrance opening 4 in the lower end 2 of the mast which may only be required for a lighting pole.
  • the mast 1 has a tubular outer wall 5 with a longitudinal section 8 that is closer to the ground 3 than to the top of the mast.
  • the longitudinal section 8 includes an opening, generally 9, normally in the front of the mast, giving access to an interior space 10 within the mast.
  • the access opening 9 is closed by a cover 11 locked in position by a locking element 13.
  • a tubular inner wall or reinforcing member 15 which is positioned within the interior of the mast 1 and within its longitudinal section 8 bordering the access opening 9.
  • the reinforcing member 15 is fixedly attached to an inner surface of the outer wall 5.
  • the reinforcing member 15 takes the form of a sleeve that snugly fits within the interior of the mast 1.
  • Projecting radially inwardly from the inner surface of the reinforcing member 15 are one or more, preferably at least a pair of, parallel, circumferentially spaced, identical, rib structures, generally 17.
  • Each of the rib structures 17 includes an undercut groove 19 which is preferably provided by forming the first reinforcing rib structure, in cross-section in the reinforcing member 15, as a pair of radially symmetrical L-shaped legs 21 and 22.
  • the inwardly-directed free end portions of the L-shaped legs 21, 22 have oppositely directed, enlarged ends or feet 23, 24 that preferably extend towards each other so that the pairs of legs and feet 21,23 and 22,24 are mirror images of each other about the center of each rib structure 17.
  • the undercut groove 19 in the rib structures can be used to mount accessory components by means of conventional fasteners.
  • the access opening 9 of the mast 1 comprises a first opening 25 in the longitudinal section 8 and a second opening 27 in the reinforcing member 15.
  • the second opening 27 is in radial registration with the first opening 25.
  • the first opening 25 is cut in the front of the outer wall 5 of the mast 1 prior to the insertion of the reinforcing member 15 in the mast.
  • the second opening 27 can, as is shown, be slightly smaller than the first opening 25 to provide a recessed abutment edge for the cover 11.
  • each of the rib structures 17 preferably comprises a longitudinally elongate structure that projects radially from, and is integrally formed with, the inner surface of the reinforcing member 15.
  • one of the rib structures 17A is generally opposite, particularly diametrically opposite, the second opening 27 in the reinforcing member 1 and at the rear of the mast.
  • This first or rear reinforcing rib structure 17A preferably extends longitudinally along the full height of the reinforcing member 15. The rear rib structure 17A thereby reinforces further the mast against weaknesses caused by its access opening 9 'and does so at a most effective location in the reinforcing member 15.
  • a second or front reinforcing rib structure 17B be provided that is circumferentially spaced from the rear rib structure 17A in the reinforcing member 15 and preferably is diametrically opposite the rear reinforcing rib structure 17A. It is especially preferred that the front reinforcing rib structure 17B extend longitudinally above and below the second opening 27 in the reinforcing member , particularly to the top and bottom of the reinforcing member 15. In this regard, it is quite particularly preferred that the access opening 9 intersect radially the front reinforcing rib structure 17B. (A particular advantage of such an arrangement will be explained below with respect to Figure 4 .) The front reinforcing rib structure 17B still further increases the strength of the reinforcing member and makes it easier to locate properly the reinforcing member in the mast during its manufacture.
  • the cover 11 is in an almost closed position.
  • a tongue 29 which engages the undercut groove 19 of the front reinforcing rib structure 17B.
  • the locking element 13 that includes a latch 31 and a latch bolt 33 which can be engaged by a suitable tool or key.
  • the latch 31 also engages the sides of the groove 19 of the front reinforcing rib structure 17B.
  • the engagement of the tongue 29 and the latch 31 with the groove 19 of the front reinforcing rib structure 17B gives an additional tangential retainment for the cover 11, which otherwise could only engage the lateral edges of the cover 11. This much improved lateral fixation of the cover meets a demand provoked by vandalism of such masts. In this regard, it has been possible for vandals to sideways kick out the covers of conventional lighting pole masts.
  • the positioning of the rear and front reinforcing rib structures 17A and 17B on diametrically opposite sides of the reinforcing member 15 also allows the reinforcing member 15 to be fit within the longitudinal section 8 of the mast 1 by internal expansion as described in GB 1413334, without fear of the reinforcing member assuming a curved shape. Such curvature could result if the amount of material in the cross-sectional areas of either the rear or front reinforcing rib structure 17A or 17B were more resistant to expansion than the other cross-sectional areas of the reinforcing member. Of course, such a situation can be avoided if the reinforcing member has a symmetrical cross-section.
  • the reinforcing member 15 can be given an initial outer diameter slightly in excess of the inner diameter of the mast 1.
  • the reinforcing member can then be fitted, in a conventional manner, by heating the mast or by cooling the reinforcing member or by effecting both operations simultaneously.
  • Another method of fixing the reinforcing member 15 to the mast involves the use of an adhesive material between the reinforcing member and the mast. This can also be done in a conventional manner.
  • the rear reinforcing rib structure 17A reinforces the finished mast 1 to overcome the weakening of the mast caused by the presence of the access opening. Additional reinforcement of the mast can be obtained from the front reinforcing rib structure 17B, above and below the access opening 9. Still further reinforcement of the mast can be obtained by positioning two additional rib structures 17 along both lateral sides of the access opening. Not all the rib structures need be of the same shape or configuration, but the principal rear reinforcing rib structure 17A opposite the access opening is preferably shaped to provide additionally an attachment rail for accessory components. All the rib structures according to the invention are preferably of a continuous cross-section so that the reinforcing member 15 can be produced by a metal extrusion process.
  • the rear and front reinforcing rib structures 17A and 17B need not be identical, and if desired, the front reinforcing rib structure 178 need not have feet 23 and 24 or an undercut groove 19, defined by such feet.
  • feet 23 and 24, if initially present on rib structures 17 during the manufacture of the mast, can later be milled off of one or more of them to make the interior of the mast more accessible or to provide a stronger latch for the cover 9.

Claims (11)

  1. Länglicher, rohrförmiger Hohlmast, umfassend eine rohrförmige Wand (5) mit einem länglichen Abschnitt (8), der eine erste Öffnung (25) hat, welche Zugang zu einem Innenraum (10) des genannten Mastes ermöglicht, und ein rohrförmiges Verstärkungsglied (15), das fest an einer Innenfläche der genannten Wand (5) befestigt ist und an die genannte erste Öffnung angrenzt, wobei das genannte Verstärkungsglied (15) wesentlich kürzer als die Länge des Mastes ist und eine zweite Öffnung (27) umfaßt, die paßgenau zur ersten Öffnung angeordnet ist, um eine Zugangsöffnung (9) in dem genannten Mast zu dem genannten Innenraum zu schaffen, dadurch gekennzeichnet, daß
    eine in einem Teil mit dem genannten Verstärkungsglied geformte, in Längsrichtung verlaufende, längliche erste Verstärkungsrippenstruktur (17, 17A) radial von einer Innenfläche des genannten Verstärkungsglieds hervorragt und generell gegenüber der genannten Zugangsöffnung (9) angeordnet ist; und
    das Verstärkungsglied (15) ebenfalls eine in einem Teil damit geformte, in Längsrichtung verlaufende, längliche zweite Verstärkungsrippenstruktur (17B) umfaßt, die sich in Längsrichtung oberhalb und unterhalb der zweiten Öffnung (27) erstreckt und radial von einer Innenfläche des genannten Verstärkungsglieds hervorragt und parallel zu der genannten ersten Verstärkungsrippenstruktur (17A) und in Umfangsrichtung von dieser beabstandet verläuft, wobei die zweite Verstärkungsrippenstruktur (17B) diametral gegenüber der genannten ersten Verstärkungsrippenstruktur (17A) angeordnet ist.
  2. Mast gemäß Anspruch 1, dadurch gekennzeichnet, daß die erste Verstärkungsrippenstruktur (17) diametral gegenüber der genannten Zugangsöffnung (9) angeordnet ist.
  3. Mast gemäß Anspruch 1, dadurch gekennzeichnet, daß die erste Verstärkungsrippenstruktur Mittel (19-24) umfaßt, die eine Befestigungsschiene für Zubehörteile bilden, welche in dem genannten Innenraum montiert werden sollen.
  4. Mast gemäß Anspruch 3, dadurch gekennzeichnet, d a ß die Mittel (19-24), die eine Befestigung bilden, eine unterschnittene Rille (19) in der genannten ersten Verstärkungsrippenstruktur (17, 17A) umfassen.
  5. Mast gemäß Anspruch 4, dadurch gekennzeichnet, d a ß die unterschnittene Rille gebildet wird, indem die genannte Rippenstruktur im Querschnitt in dem genannten Verstärkungsglied als Paar von radial symmetrischen L-förmigen Schenkeln (21, 22) ausgebildet wird.
  6. Mast gemäß Anspruch 5, dadurch gekennzeichnet, d a ß die L-förmigen Schenkel (21, 22) nach innen gerichtete freie Abschnitte mit einander gegenüberliegenden vergrößerten Füßen (23, 24) haben, die sich so aufeinander zu erstrecken, daß die genannten Schenkel und die genannten Füße (23, 24) Spiegelbilder von einander um den Mittelpunkt der genannten Rippenstruktur sind.
  7. Mast nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die erste und die zweite Rippenstruktur einen identischen Querschnitt haben.
  8. Mast nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, d a ß die genannte Zugangsöffnung (9) von einer Abdeckung (11) verschlossen wird und Einrastmittel (13), die auf der genannten Abdeckung vorgesehen sind, mit der genannten zweiten Verstärkungsrippenstruktur (17B) in Eingriff gebracht werden, die von der genannten Zugangsöffnung (9) unterbrochen wird.
  9. Mast nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, d a ß das genannte Verstärkungsglied ebenfalls zwei weitere, in einem Teil damit geformte, radial hervorragende, in Längsrichtung verlaufende, längliche Rippenstrukturen hat, die an gegenüberliegenden seitlichen Seiten der genannten Zugangsöffnung angeordnet sind.
  10. Mast nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das genannte Verstärkungsglied (15) an der Innenfläche des genannten länglichen Abschnitts (8) durch Preßsitz befestigt wird.
  11. Mast nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das genannte Verstärkungsglied (15) an der Innenfläche des genannten länglichen Abschnitts (8) mit Hilfe eines Klebstoffs befestigt wird.
EP19970310696 1997-01-22 1997-12-31 Länglicher, rohrförmiger Hohlmast Expired - Lifetime EP0855484B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19970310696 EP0855484B1 (de) 1997-01-22 1997-12-31 Länglicher, rohrförmiger Hohlmast

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP97200146 1997-01-22
EP97200146 1997-01-22
EP19970310696 EP0855484B1 (de) 1997-01-22 1997-12-31 Länglicher, rohrförmiger Hohlmast

Publications (2)

Publication Number Publication Date
EP0855484A1 EP0855484A1 (de) 1998-07-29
EP0855484B1 true EP0855484B1 (de) 2003-06-25

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EP19970310696 Expired - Lifetime EP0855484B1 (de) 1997-01-22 1997-12-31 Länglicher, rohrförmiger Hohlmast

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807694B1 (fr) 2000-04-14 2002-07-05 Europ De Laquage Et De Faconna Dispositif d'assemblage des bords longitudinaux de panneaux, lattes ou lambris
FR2808822B1 (fr) 2000-05-15 2003-01-03 Europ De Laquage Et De Faconna Dispositif d'assemblage des bords longitudinaux de panneaux, lattes ou lambris, a repartition de forces
FR2825734B1 (fr) 2001-06-12 2004-07-09 Europ De Laquage Et De Faconna Dispositif d'assemblage de panneaux, lattes ou lambris, a repartition de forces
FR2828703A1 (fr) 2001-08-14 2003-02-21 Europ De Laquage Et De Faconna Procede de pose de panneaux, lattes ou lambris comportant un dispositif d'assemblage des bords a repartition de forces
DE10338347A1 (de) * 2003-08-21 2005-03-17 Christa Reiners Beleuchtungsmast aus Metall
FR2874050B1 (fr) * 2004-08-09 2008-11-14 Technilum Ensemble de mobilier urbain.
EP2246504B1 (de) * 2009-04-27 2013-09-18 Europoles Sp. z.o.o. Konischer Mast

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1913331A1 (de) * 1969-03-15 1970-09-24 Adolf Schuch Kg Lichttechn Spe Leuchtenmast aus Kunststoff
NL7908623A (nl) * 1979-11-28 1981-07-01 Hunter Douglas Ind Bv Holle lichtmetalen lichtmast en binnenbus daarvoor.
NL8902163A (nl) * 1989-08-25 1991-03-18 Alcoa Nederland Bv Lichtmast met door een deur af te sluiten toegangsopening.
FR2654184B1 (fr) * 1989-11-03 1992-01-24 Solycome Element tubulaire obtenu par assemblage bord a bord de deux profiles elementaires.
FR2706686A1 (fr) * 1993-06-14 1994-12-23 Danis Nathalie Alberte Dispositif destiné à améliorer le câblage et l'entretien des raccordements de supports électriques.
FR2726598B1 (fr) * 1994-11-04 1997-01-24 Equip Comp Ind Mat tubulaire
EP0751271B1 (de) * 1995-06-26 2000-08-30 Hunter Douglas Industries B.V. Rohrmast-Tür

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