EP0230403B1 - Hebevorrichtung für die Mastteile eines zusammengebauten Mastes, insbesondere eines beweglichen Antennenmastes der Fachwerkart - Google Patents

Hebevorrichtung für die Mastteile eines zusammengebauten Mastes, insbesondere eines beweglichen Antennenmastes der Fachwerkart Download PDF

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Publication number
EP0230403B1
EP0230403B1 EP19870850011 EP87850011A EP0230403B1 EP 0230403 B1 EP0230403 B1 EP 0230403B1 EP 19870850011 EP19870850011 EP 19870850011 EP 87850011 A EP87850011 A EP 87850011A EP 0230403 B1 EP0230403 B1 EP 0230403B1
Authority
EP
European Patent Office
Prior art keywords
mast
jacket
sections
transport screw
screw
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
Application number
EP19870850011
Other languages
English (en)
French (fr)
Other versions
EP0230403A1 (de
Inventor
Bertil Jonsson
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.)
Jonsson Processmekanik AB
Original Assignee
Jonsson Processmekanik AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jonsson Processmekanik AB filed Critical Jonsson Processmekanik AB
Publication of EP0230403A1 publication Critical patent/EP0230403A1/de
Application granted granted Critical
Publication of EP0230403B1 publication Critical patent/EP0230403B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like

Definitions

  • the present invention refers to and elevating device for lifting the mast by the lowermost mast sections a sectional mast, especially a movable aerial mast of framework type, comprising a foot portion with a mast support and guide jacket, said elevating device including a power-operated screw mechanism, the elongated transport screw of which extends vertically along one side of the guide jocket.
  • Such a mast and lifting device is known from BE-A 449 601.
  • Movable aerial masts have to fill a plurality of partly contradictory requirements. Thus, they have to be strong and rigid but still relatively light and easily mountable and dismountable.
  • Conventional mast structures usually are of framework type and the masts are put together from a number of sections. The mast is erected by arranging at a desired place a foot portion of the mast having a support and guide jacket therefor and introducing into said jacket the sections one by one, coupling them together with the nearest preceding section and raising them by means of any suitable raising and lowering mechanism a sufficient distance for allowing the introduction of the subsequent mast section into the jacket.
  • the conventional raising and lowering mechanisms have been rope blocks or chain winches having a hook which is connected with the lower end of each mast section after the same has been inserted into the guide jacket after which raising is made, the mast is locked, the hook released and the raising and lowering mechanism returned to the initial position for again connecting the hook to the lower end of the subsequent mast section.
  • the object of the present invention now is to suggest such a device and the invention comprises mast and device of the aforementioned type which is characterized in that the screw contacts externally with its periphery the peripheral contour of a mast section housed parallel therewith within the jacket and in that each mast section in its lower portion at the point of contact on the peripheral contour is provided with a mechanical component serving as an open-sided nut segment meshing with the threads of the transport screw.
  • the transport screw certainly operates intermittently but permanently in the same direction during the erection of the mast and in the opposite direction during the lowering of said mast.
  • the respective mast sections only need to be inserted into the support and guide jacket of the foot portion in order to be brought directly into meshing with the transport screw with its nut segment, after which the screw is rotated and the mast section together with the preceding sections is raised a distance substantially corresponding to the length of one section, after which the subsequent mast section is introduced into the guide jacket, coupled to the preceding mast section and thereafter raised by means of the transport screw in cooperation with the nut segment of the last-mentioned section.
  • Fig 1 is a side elevational view of a mast with an elevating device according to the invention with a support and guide jacket in a foot portion of the mast and Fig 2 is a plan view from above of said guide jacket.
  • a movable aerial mast of framework type comprises a foot portion 1 and a plurality of mutually equal mast sections 2 of framework type and in the present case having triangular cross section.
  • the uppermost section carries in its upper end an aerial element such as a pa- raboloidal aerial 3.
  • the sections 2 are provided with suitable mountings for some suitable kind of coupling means such as a bolt connection of easy-coupling type.
  • the mast In its erected position the mast rests with its lowermost sections in a support and guide jacket 4 having an elevating device 5.
  • the jacket has the same general cross sectional shape as the mast sections 2, in the present case thus triangular shape, and surrounds the lowermost mast sections 2 with moderate clearance.
  • the height of the jacket substantially corresponds to the total length of two mast sections 2 and for stabilizing the mast the jacket 4 is provided with support legs 6 and side struts 7 protruding from the corners of the triangular cross section. From the top as well as from other levels of height of the mast, if desired, usually also extend span wires 8.
  • the jacket which suitably also is of framework type, is provided in the lower portion of one of its sides with an opening 10 in said side wall.
  • the mast sections 2 are guided by means of suitable guide members 11, preferably in the form of guide rollers cooperating with the corner edges of said mast sections 2.
  • the elevating or raising and lowering mechanism 5 may comprise an elongated vertical transport screw 12 which is along another side of the guide jacket 4 also provided with a suitable opening.
  • the screw 12 has a length which at least corresponds to the length of each mast section 2 and extends from a bottom of the guide jacket 4 and upwardly to a position above the level of a mast section 2 standing on the bottom of the jacket 4 or, in other words above the open portion of the framework at the insertion and removal side of the jacket 4.
  • the transport screw 12 is connected with some suitable kind of drive mechanism 13 not further illustrated, such as a worm drive driven by an electric motor for 12 or 24 volts.
  • the device also is provided with a connection for mounting of a hand crank for allowing manual operation of the transport screw in case of lack of electric current.
  • the transport screw 12 may be arranged in a plane coinciding with the center line of the adjacent jacket side such that the screw with its periphery approximately contacts externally one of the sides of a mast section 2 located in the jacket 4 and oriented parallelly thereto along an axis extending in said side, said axis preferably being the longitudinal center line of said side.
  • each mast section 2 according to the invention may be provided at the lower end of said center line with a nut segment 14 adapted for meshing with the threads of said transport screw 12.
  • the nut segment may be constituted by a slide block of suitable material such as bronze or by a roller.
  • the mast provided with the elevating device according to the invention may be erected in the following way. Firstly, the support and guide jacket 4 is arranged and levelled at the desired place and thereafter a first mast section 2 is inserted into the guide jacket 4 through the opening in one of the sides thereof, said section 2 of course being oriented in such a way that a side provided with a nut segment 14 is turned towards the side of the jacket 4 at which transport screw 12 is located. After that the rotation of the transport screw 12 is started and owing to the movement of the nut segment 14 along the threads of the screw 12 a raising of the mast section 2 through the jacket 4 is obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Claims (2)

1. Zusammengesetzter Mast, insbesondere beweglicher Antennenmast der Fachwerkart, und Hebevorrichtung zum Anheben des Mastes an den untersten Mastteilen, mit einem Fußabschnitt mit einer Maststütze und einem Führungsgerüst, wobei die Hebevorrichtung einen kraftbetätigten Gewindespindeltrieb aufweist, dessen lange Verstellspindel (12) sich senkrecht entlang einer Seite des Führungsgerüstes (4) erstreckt, dadurch gekennzeichnet, daß die Gewindespindel (12) mit ihrem Außenumfang an der Außenumfangskontur eines parallel zu ihr im Gerüst aufgenommenen Mastteils (2) anliegt, und daß jeder Mastteil (2) in seinem unteren Abschnitt an der Berührungsstelle der Außenumfangskontur mit einem mechanischen Bauteil (14) versehen ist, das als offenes Mutternsegment dient, welches mit dem Gewinde der Verstellgewindespindel (12) in Eingriff ist.
2. Vorrichtung nach Anspruch 1 für Mastteile und eine Stütze und ein Führungsgerüst (4) von polygonaler, insbesondere dreieckiger Querschnittsgestalt, dadurch gekennzeichnet, daß die Verstellgewindespindel (12) so angeordnet ist, daß ihre Längsachse in einer durch die Längsmittellinie der Gerüstseite gehenden Ebene zentriert ist, und daß das Mutternsegment (14) jedes Mastteils (2) am unteren Ende der Längsmittellinie von wenigstens einer der Seiten der Teile (2) angeordnet ist, wobei sich die Verstellgewindespindel (12) ferner von einem Unterteil des Gerüsts (4) nach oben bis auf eine Höhe erstreckt, welche die Länge eines Mastteils (2) übersteigt.
EP19870850011 1986-01-17 1987-01-16 Hebevorrichtung für die Mastteile eines zusammengebauten Mastes, insbesondere eines beweglichen Antennenmastes der Fachwerkart Expired EP0230403B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8600213A SE451376B (sv) 1986-01-17 1986-01-17 Hoj- och senkanordning for mastsektioner vid en sektionsvis sammansettbar mast, serskilt en flyttbar antennmast av fackverkstyp
SE8600213 1986-01-17

Publications (2)

Publication Number Publication Date
EP0230403A1 EP0230403A1 (de) 1987-07-29
EP0230403B1 true EP0230403B1 (de) 1989-08-09

Family

ID=20363133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870850011 Expired EP0230403B1 (de) 1986-01-17 1987-01-16 Hebevorrichtung für die Mastteile eines zusammengebauten Mastes, insbesondere eines beweglichen Antennenmastes der Fachwerkart

Country Status (3)

Country Link
EP (1) EP0230403B1 (de)
DE (1) DE3760412D1 (de)
SE (1) SE451376B (de)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1066720B (de) * 1959-10-08
BE449601A (de) *
DE119095C (de) *
FR1256677A (fr) * 1960-02-12 1961-03-24 Dispositif pour le montage de grues à mât formé d'éléments superposés
DE1228040B (de) * 1961-09-19 1966-11-03 Markus Schmidt Tychsen Derrick Kran, dessen Saeule aus einer Mehrzahl von Mastelementen aufgebaut ist
FR1325120A (fr) * 1962-03-23 1963-04-26 Installation de mât de support extensible
AT292966B (de) * 1966-10-12 1971-09-27 Friedrich Freimueller Aus Schüssen aufgebauter Gittermast
FR1543012A (fr) * 1967-10-24 1968-10-18 Dispositif de transformation d'un mouvement rotatif en une translation rectiligne, particulièrement pour le déplacement d'une charge
FR1585396A (de) * 1968-11-26 1970-01-16
FR2247913A6 (en) * 1971-07-22 1975-05-09 Comabi Elevator formed of scaffolding frames - has ladder elements enclosing vert. operating screws

Also Published As

Publication number Publication date
DE3760412D1 (en) 1989-09-14
SE451376B (sv) 1987-10-05
SE8600213D0 (sv) 1986-01-17
SE8600213L (sv) 1987-07-18
EP0230403A1 (de) 1987-07-29

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