EP0000793B1 - Mât transportable, particulièrement adapté à des installations de radiopropagation dirigée - Google Patents

Mât transportable, particulièrement adapté à des installations de radiopropagation dirigée Download PDF

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Publication number
EP0000793B1
EP0000793B1 EP78200068A EP78200068A EP0000793B1 EP 0000793 B1 EP0000793 B1 EP 0000793B1 EP 78200068 A EP78200068 A EP 78200068A EP 78200068 A EP78200068 A EP 78200068A EP 0000793 B1 EP0000793 B1 EP 0000793B1
Authority
EP
European Patent Office
Prior art keywords
mast
pawl
raising
friction
mast tube
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
EP78200068A
Other languages
German (de)
English (en)
Other versions
EP0000793A1 (fr
Inventor
Robert Graf
René Meier
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0000793A1 publication Critical patent/EP0000793A1/fr
Application granted granted Critical
Publication of EP0000793B1 publication Critical patent/EP0000793B1/fr
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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1235—Collapsible supports; Means for erecting a rigid antenna

Definitions

  • the present invention relates to a portable mast, in particular for directional radio systems, with a tripod and rotatable tripod head, a mast tube lifting and lowering device accommodated in the tripod head, having friction means, pluggable and braceable mast tube elements and guy elements for fixing the mast at the installation site.
  • Known transportable radio masts mainly suffer from the fact that their tripod-mounted lifting device, by means of which the individual mast tube elements are lifted one after the other in order to be able to attach the following mast tube element, are complicated and also prone to failure.
  • the lifting device usually has a toothed drive with a toothed rack and pinion, the function of which is impaired when contaminated.
  • This disadvantage can play a decisive role, particularly in military applications.
  • a device for the present purpose which uses friction means in the form of three tiltable friction wheel pairs for lifting and lowering a mast.
  • friction wheels themselves work reliably and reliably, three bevel gear pairs are required for their common drive, which complicate and make the equipment more expensive and also require a certain amount of maintenance, which should be avoided in military applications.
  • a mast lifting and lowering device which has conical friction sleeve pairs for lifting, lowering and holding the mast, each consisting of an inner and an outer sleeve and in which, depending on the direction of actuation of the outer sleeve the inner sleeve releases or clamps the mast, thus creating a positive connection in the desired direction to raise or lower the mast.
  • this device in particular the conical sleeves, require high machining accuracy with tight tolerances and correspondingly high manufacturing costs for proper functioning.
  • Clamping hoists are also generally known, i.a. one from DE-B-1 037 098, in which a lifting or lowering movement can be carried out by alternately tilting and releasing clamping plates enclosing a mast or a stamp in cooperation with a holding plate. Clamping hoists of this type are particularly widespread in the design as wagons.
  • such a clamp hoist is for the present purpose, i.e. not suitable for lifting and lowering masts, the top of which carries radio devices weighing 50 and more kg.
  • a hoist must be modified accordingly, e.g. in such a way that lifting and lowering can be carried out without being affected by the process of attaching or detaching the individual mast tube elements when the system is being set up or removed.
  • Fig. 1 denote the tripod, 2 the mast tube, 3 guy ropes, which lead via pulleys 5, 6, 7, 8, 9 to a rope tensioner 10 of known type with which the ropes 3 can be tensioned individually or together .
  • 11, 12 and 13 denote reels for winding the ropes 3.
  • ropes 4 are attached to the anchoring points 5, 6 and 7 and tensioned by hand.
  • the stand 1 shown in FIG. 2 has three legs 14 which are adjustable in length, the adjustment mechanism of which is described below.
  • the tripod head 16 is rotatably mounted on a common head plate 15 in order to be able to rotate the mast 2, of which the uppermost mast tube element 17 is shown in its starting position in FIG. 2, in the desired azimuth direction.
  • a taper pin 18 and two shackle plates 19 for fastening the guy ropes 3 and 4.
  • Articulated claws 20 ensure that the tripod legs 14 stand securely.
  • Fig. 3 shows the tripod head 16 with the lifting and lowering device housed therein for the mast tube 2 and with the mast tube element 17.
  • a base plate 21 is rotatably supported, with a plastic disc 22 the vertical axial thrust and a plastic sleeve 23 absorbs the horizontal forces.
  • the base plate 21 there is an annular groove 24 in which there are sliding blocks 25 with an internal thread which, in conjunction with screws 26 which project upwards through the head plate 15, enable the base plate 21 to be clamped.
  • a washer 27 attached to the screw end prevents the screw 26 from being completely unscrewed.
  • the upper pawl 28 serves to carry the mast tube, the middle pawl 29 for lowering and the lower pawl 30 for lifting the mast tube 17. Accordingly, these pawls are referred to as support pawls, countersunk pawls or lifting pawls. These pawls are shown individually in the plan and side view in FIGS. 5 to 10.
  • the carrying pawl 28 has a lifting thumb 32 which can be pivoted about a bolt 31 and has a threaded bore 33 into which a lever tube for actuating the lifting thumb 32 can be screwed.
  • the support pawl 28 On the side opposite the lifting thumb 32, the support pawl 28 has two tabs 34 (see FIG. 6) with which the support pawl is supported on a bolt 36 mounted in the housing 35.
  • the countersunk pawl 29 shown in detail in FIGS. 7 and 8 carries on one side a roller 41 cooperating with the lifting thumb 32 and on the opposite side two setscrews 42 with nuts 43 for fixing the setscrews 42, which serve as pawl pivot points.
  • the lifting pawl 30 shown in detail in FIGS. 9 and 10 is essentially mirror-inverted, like the lowering pawl 29, but additionally has a straight cutting edge 45 on the side opposite its roller 44.
  • the pawls 28, 29 and 30 are provided with a bore 46, 47 and 48 which is inclined to the pawl plane by a few degrees, which enclose the mast tube and allow tilting and self-locking on the mast tube in a known manner.
  • the lifting pawl 30 also has two setscrews 49 and nuts 50 for fixing them, these setscrews also serving as pawl pivot points.
  • a lifting thumb 52 pivotably mounted on a bolt 51 with a threaded bore 53 which is intended to receive a lever tube.
  • the two lever tubes 54 and 55 for the lifting thumbs 32 and 52 which are shown schematically in FIGS. 11 and 12, can be introduced through an opening in the tripod head 16, which can be closed by a door 56.
  • a catch lever 61 On the side opposite the lifting thumb is a catch lever 61 which is pivotally mounted about the bolt 36. Its lower part is designed as a nose 62 and in the middle part it has a series of locking teeth 63 which are intended to come into engagement with the cutting edge 45 of the lifting pawl 30.
  • a helical compression spring 64 In the wall of the housing 35 there is a helical compression spring 64 which is held by a screw 65. The spring 64 presses the nose 62 of the catch lever 61 against the outer surface of the mast tube element 17.
  • FIGS. 11 and 12 The mode of operation of the lifting and lowering device and the catch lever can be seen from FIGS. 11 and 12.
  • the lifting thumb 53 first presses the roller 44 and thus the lifting pawl 30 upwards, whereby at the same time the force transmitted from the spring 58 to the lowering pawl 29 pivots it clockwise.
  • This movement is transmitted via the roller 41 and the lifting thumb 32 to the pawl 28, which also rotates clockwise and thereby releases the mast tube element 17, which, when the lifting tube 55 is pressed down further, by the lifting pawl 30, which has meanwhile clamped the mast tube element 17 , pushes up.
  • the lever tube 55 is subsequently pulled up, this process proceeds in reverse, with the pawl 28 first taking effect and then the lifting pawl releasing the mast tube element.
  • the lever tube 54 is pivoted downward, as a result of which the lowering pawl 29 first comes into clamping engagement with the mast tube element 17 and then the lifting pawl 30 and the supporting pawl 28 are released, so that the mast is lowered when the lever tube 54 is pushed further down.
  • the plate springs 38 and the helical compression springs 39, 57 and 58 serve to clamp the pawls against one another and to hold them in the position required for the function.
  • the two setscrews 42 and 49 with the associated nuts 43 and 50 are used to adjust the mutual position of the pawls, in particular to adapt to the mast tube diameter to compensate for diameter tolerances.
  • the catch lever 61 has the task of holding the lifting pawl 30 in place as shown in FIG. 12 if the subsequent mast tube element 67 is not connected to the latter in an integrity manner, ie, with its end face butting against the end face 66 of the upper tube element.
  • the spring 64 (FIG. 3) presses the catch lever into the position shown in FIG. 12, the cutting edge 45 (FIG. 3) of the lifting pawl 30 engages in one of the locking teeth 63.
  • the lifting pawl If the lifting pawl is actuated in this position via the lifting thumb 52, it swings up and down empty until the tubular elements are properly connected, i.e. until their adjacent end faces abut without a gap. This prevents incorrect assembly of the mast tube and prevents the bottom mast tube element from being lifted out of the tripod head if inattentive.
  • FIG. 13 shows the connecting elements for assembling the mast tube elements. They consist of a tie rod 68 with a collar 69 and a screw thread 73 which interacts with the internal thread of a clamping cone 74.
  • the tie rod the head of which has a slot for receiving a corresponding key, is supported with its collar 69 on the support ring 70 fastened in the mast tube element and is secured in the axial direction by a cover 71 fastened by means of screws 72.
  • the alignment of the mast tube elements 17 and 67 to be connected to one another is ensured by an expansion sleeve 75 connected to the tube element 67, which is cylindrical in the lower part and has an inner cone in the upper part, into which the clamping cone 74 is inserted.
  • the clamping sleeve 75 has a longitudinal slot 76, into which a nose of the clamping cone 74, which acts as an anti-rotation lock and engages, engages.
  • FIG. 20 shows a leg 14 of the tripod and the adjustment mechanism for adjusting the leg length. It carries a claw 21 at its lower end, which is pivotably mounted on a displaceable tube 78 and ensures that the tripod stands securely.
  • This tube 78 is provided in its upper part with a series of transverse bores for receiving a bolt 80, the ends of which protrude on both sides are displaceable in the axial direction of the tripod leg in two diametrically opposed longitudinal slots of an outer guide tube 79.
  • a protective tube 81 connected to a knurled nut 82 is provided above the bolt 80 and a knurled nut 83 is provided below the bolt 80.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Earth Drilling (AREA)
  • Support Of Aerials (AREA)

Claims (3)

1. Mât transportable, notamment pour installations de radiodiffusion à faisceau hertzien, comportant un pied et une tête de pied rotative, un dispositif de levage et d'abaissement du tube du mât, comportant des moyens de friction, logé dans la tête du pied, des éléments tubulaires de mât pouvant être assemblés et solidarisés et des éléments d'haubanage pour fixer le mât au lieu d'érection, caractérisé en ce que les moyens de friction du dispositif de levage et d'abaissement comprennent trois cliquets de friction (28, 29, 30) annulaires embrassant le tube du mât qui sont superposés à l'intérieur de la tête (16) du pied dans la direction longitudinale des éléments tubulaires du mât (17 et 67), le cliquet de friction supérieur jouant le rôle de cliquet de support (28), comportant un mentonnet (32) actionnable manuellement, en liaison fonctionnelle avec le cliquet de friction central (29) et étant monté pivotant de son côté opposé au mentonnet (32), en ce qu'un mentonnet actionnable manuellement (52), en liaison fonctionnelle avec le cliquet de friction inférieur jouant le rôle de cliquet de levage (30) est monté pivotant dans la tête du pied, en ce qu'entre le cliquet de levage (30) et le cliquet de friction central jouant le rôle de cliquet d'abaissement (29) se trouvent des moyens élastiques (57, 58) destinés à maintenir les deux cliquets (29, 30) en contact avec les deux mentonnets (32, 52) cités, et en ce qu'il comporte des moyens (36, 45, 61, 64, 65) qui fixent le cliquet de levage (30) dès qu'une surface frontale inférieure (66) d'un élément tubulaire (17) qui n'est pas en contact avec la surface frontale voisine d'un élément tubulaire (67) suivant immédiatement a atteint une positiondéter- minée à l'intérieur de la tête (16) du pied.
2. Mât selon la revendication 1, caractérisé en ce que les moyens de fixation du cliquet de levage (30) comprennent une clenche (61) sollicitée par un ressort de compression hélicoïdale (64), pivotante autour d'un tourillon (36), comportant un bec (62) et des crans (63) ainsi qu'une arête (45) située sur le cliquet de levage (30).
3. Mât selon la revendication 1 ou 2, caractérisé en ce qu'il comporte pour relier les éléments tubulaires (17, 67) du mât, un manchon d'expansion (75) comportant un cône intérieur, un cône de coincement (74) comportant un alésage taraudé pour coopérer avec ce cône intérieur, un tirant (68) destiné à être vissé dans cet alésage taraudé, ainsi que des moyens (70, 71, 72) de fixation axiale du tirant (68) dans l'élément tubulaire (17, 67) du mât.
EP78200068A 1977-08-04 1978-06-29 Mât transportable, particulièrement adapté à des installations de radiopropagation dirigée Expired EP0000793B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH956677A CH616984A5 (fr) 1977-08-04 1977-08-04
CH9566/77 1977-08-04

Publications (2)

Publication Number Publication Date
EP0000793A1 EP0000793A1 (fr) 1979-02-21
EP0000793B1 true EP0000793B1 (fr) 1981-02-11

Family

ID=4353318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78200068A Expired EP0000793B1 (fr) 1977-08-04 1978-06-29 Mât transportable, particulièrement adapté à des installations de radiopropagation dirigée

Country Status (6)

Country Link
US (1) US4212015A (fr)
EP (1) EP0000793B1 (fr)
CA (1) CA1105612A (fr)
CH (1) CH616984A5 (fr)
DE (2) DE7726367U1 (fr)
IT (1) IT1097412B (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201067C2 (de) * 1981-01-28 1988-04-14 Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter Teleskopierbarer Tragmast
DE3319330C2 (de) * 1983-05-27 1986-01-23 Südwestfunk, Anstalt des öffentlichen Rechts, 7570 Baden-Baden Antennenanlage, insbesondere für Füllsender und Empfangsstationen
US4587526A (en) * 1984-05-02 1986-05-06 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Latching mechanism for deployable/re-stowable columns useful in satellite construction
FR2575147B1 (fr) * 1984-12-26 1988-03-25 Mathellier Gervais Trepied a hauteur variable, destine a elever du materiel d'eclairage ou toutes autres charges
FR2597849B1 (fr) * 1986-04-24 1990-10-26 Etu Rech Chimiq Lab Procede de levage d'un mat en plusieurs elements, moyens en vue de la mise en oeuvre du procede et mats pourvus de ces moyens
GB8720658D0 (en) * 1987-09-02 1987-10-07 C S Antennas Ltd Telescopic masts
FR2634863B1 (fr) * 1988-07-29 1991-03-29 Lerc Lab Etudes Rech Chim Pietement pour un mat d'antenne, mat d'antenne pourvu de ce pietement et procede pour eriger un tel mat pourvu de ce pietement
US5218375A (en) * 1991-11-15 1993-06-08 Antenna Products Corporation Rapidly extendible and retractable antenna mast
US8381460B1 (en) 2007-02-27 2013-02-26 Patrick P. McDermott Extendable beam structure (EBS)
ES2522640T3 (es) * 2009-05-11 2014-11-17 Secobel Base para un mástil transportable y conjunto de mástil que comprende tal base
EP2824325B1 (fr) * 2013-07-11 2017-10-18 Siemens Aktiengesellschaft Stockage de section de tour
US11613905B1 (en) 2020-07-29 2023-03-28 Robert C. Lee Antenna tower construction/deconstruction stability assemblies and methods
US20220127867A1 (en) * 2020-10-28 2022-04-28 Innovatech, Llc Temporary brace system for a structure

Family Cites Families (15)

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Publication number Priority date Publication date Assignee Title
GB191006211A (en) * 1910-03-12 1910-10-13 Karl Nitschke Telescopic Lifting-gear.
US1031185A (en) * 1911-11-08 1912-07-02 John Krulish Pipe-pulling machine.
US1851420A (en) * 1930-09-23 1932-03-29 Fulton Sylphon Co Feeding device for strip materials
US2369195A (en) * 1943-06-03 1945-02-13 Anthony P Wiertz Form-raising jack
US2424929A (en) * 1946-10-03 1947-07-29 Lawrence A Haney Post handling jack
US2793717A (en) * 1950-10-07 1957-05-28 Camburn Sales & Mfg Corp Extendable mast
GB705598A (en) * 1951-02-13 1954-03-17 John Hunt Theakston Improvements in masts, poles and the like and the erection thereof
DE962197C (de) * 1952-09-27 1957-04-18 Braselmann Fa Ferd Hebevorrichtung mit Klemmplattenschaltwerk
DE1037098B (de) * 1952-11-11 1958-08-21 Hans Utz Klemmhubwerk mit Rueckholvorrichtung
CH336571A (de) * 1957-02-02 1959-02-28 Mewag Metallwarenfabrik Ag Hebezeug
US3320703A (en) * 1964-08-26 1967-05-23 Collins Radio Co Device for raising or lowering antenna mast
AT303124B (de) * 1969-07-28 1972-11-10 Alfredo Ferrari Schiebevorrichtung für Autoantennen
US3688455A (en) * 1970-10-23 1972-09-05 Sanders Associates Inc Telescoping support with double acting piston and latch and retaining means
FR2167435B1 (fr) * 1972-01-14 1975-10-24 Camusat Gueguen Telecomm
FR2263975A1 (en) * 1974-03-15 1975-10-10 Cloup Jean Vertical mast erection equipment - has single motor driving three mast friction rollers and guy rope winches

Also Published As

Publication number Publication date
DE2738317A1 (de) 1979-02-15
IT1097412B (it) 1985-08-31
EP0000793A1 (fr) 1979-02-21
IT7826106A0 (it) 1978-07-26
DE7726367U1 (de) 1979-05-10
CA1105612A (fr) 1981-07-21
US4212015A (en) 1980-07-08
CH616984A5 (fr) 1980-04-30

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