EP0000793A1 - Transportable mast, especially for directional broadcast installations - Google Patents

Transportable mast, especially for directional broadcast installations Download PDF

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Publication number
EP0000793A1
EP0000793A1 EP78200068A EP78200068A EP0000793A1 EP 0000793 A1 EP0000793 A1 EP 0000793A1 EP 78200068 A EP78200068 A EP 78200068A EP 78200068 A EP78200068 A EP 78200068A EP 0000793 A1 EP0000793 A1 EP 0000793A1
Authority
EP
European Patent Office
Prior art keywords
pawl
lifting
mast
mast tube
tripod head
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.)
Granted
Application number
EP78200068A
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German (de)
French (fr)
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EP0000793B1 (en
Inventor
Robert Graf
René Meier
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BBC Brown Boveri AG Switzerland
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BBC Brown Boveri AG Switzerland
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Publication date
Application filed by BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0000793A1 publication Critical patent/EP0000793A1/en
Application granted granted Critical
Publication of EP0000793B1 publication Critical patent/EP0000793B1/en
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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
    • E04H12/34—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 transportable 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, mast tube elements which can be plugged and braced, and guy elements for fixing the mast at the installation site.
  • Known transportable radio masts mainly suffer from the fact that their lifting device accommodated in the tripod head, 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 pinion with rack and pinion, the function of which is impaired when contaminated. Especially at This disadvantage can play a decisive role in military applications.
  • the mast according to the invention is characterized in that its lifting and lowering device has three ring-shaped friction pawls enclosing the mast tube, which are arranged one above the other within the tripod head in the longitudinal direction of the mast tube elements, the upper friction pawl serving as a carrying pawl, one in operative connection with the middle friction pawl has standing, manually operated lifting thumb and is pivotally mounted on its side opposite the lifting thumb, that in the tripod head, a friction thumb, which is operatively connected to the lower, serving as a lifting pawl, is pivotably mounted between the lifting pawl and the middle, as a lowering pawl Serving friction pawl spring means are provided which are intended to hold the two pawls in contact with the two lifting thumbs mentioned, and that means are present which fix the lifting pawl as soon as a lower end face of a Mast tube element, which is not in contact with the adjacent end face of a next mast tube element, a certain position within the Tripod head has reached.
  • Fig. 1 denote 1 the tripod, 2 the mast tube, 3 guy ropes that lead via pulleys 5, 6, 7, 8, 9 to a rope tensioner 10 of known type, with which the ropes 3 are tensioned individually or together can.
  • II, 12 and 13 denote reels for winding the ropes 3.
  • ropes 4 are fastened 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 and whose adjustment mechanism 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, a plastic disc 22 the vertical axial thrust and a plastic bushing 23 the horizontal forces records.
  • 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 upper 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 FIGS. 5 to 10 in plan and side view.
  • 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 4l which interacts 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 enable 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.
  • 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 number 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, which is simultaneously pivoted clockwise by the force transmitted from the spring 58 to the lowering pawl 29.
  • This movement is transmitted via the roller 4l and the lifting thumb 32 to the pawl 28, which also rotates clockwise and thereby releases the mast tube element 17, which, when the lever 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 as shown in FIG. 12 if the subsequent mast tube element 67 is not connected to the latter in an integrity manner, i.e. 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 engaging 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 with the internal thread of a clamping cone 74 cooperates.
  • 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, in 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 in its upper one Partly provided with a series of transverse bores for receiving a bolt 80, the ends of which protrude on both sides can be displaced in the longitudinal 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 below the bolt 80.

Abstract

Der Mast ist zusammengesetzt aus Mastrohrelementen (17), die hintereinander mittels einer in einem Stativkopf untergebrachten Hebevorrichtung gehoben und nach Erreichen einer bestimmten Höhe im Stativkopf mit dem jeweils nächsten Mastrohrelement verbunden werden. Die Hebevorrichtung besteht aus drei übereinander angeordneten, durch Reibung selbsthemmenden Klinken: Tragklinke (28), Senkklinke (29) und Hubklinke (30), die in Verbindung mit Federn (38,39,57,58) ein schlupfloses Heben, Senken und Arretieren der Mastrohrelemente erlauben. Ein Fanghebel (61) mit einer Tastnase (62) sorgt dafür, dass der Bedienungsmann auf eine fehlerhafte Verbindung der Mastrohrelemente aufmerksam wird und dass ein im Bereich der Hebevorrichtung befindliches Mastrohrelement erst nach korrektem Anfügen des folgenden Mastrohrelementes aus dem Stativkopf herausgeschoben werden kann.The mast is composed of mast tube elements (17) which are lifted one after the other by means of a lifting device accommodated in a tripod head and, after reaching a certain height in the tripod head, are connected to the next mast tube element. The lifting device consists of three superimposed pawls, which are self-locking due to friction: supporting pawl (28), lowering pawl (29) and lifting pawl (30), which, in conjunction with springs (38,39,57,58), enable a smooth lifting, lowering and locking of the Allow mast tube elements. A catch lever (61) with a sensing lug (62) ensures that the operator becomes aware of a faulty connection of the mast tube elements and that a mast tube element located in the area of the lifting device can only be pushed out of the tripod head after the following mast tube element has been correctly attached.

Description

Die vorliegende Erfindung betrifft einen transportablen Mast, insbesondere für Richtfunkanlagen, mit einem Stativ und drehbarem Stativkopf, einer im Stativkopf untergebrachten Mastrohrhebe- und-eenkvorrichtung, zusammensteck-und verspannbaren Mastrohrelementen und Abspannelementen für die Fixierung des Mastes am Aufstellort.The present invention relates to a transportable 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, mast tube elements which can be plugged and braced, and guy elements for fixing the mast at the installation site.

Bekannte transportable Richtfunkmaste kranken hauptsächlich daran, dass ihre im Stativkopf untergebrachte Hebevorrichtung, mittels deren die einzelnen Mastrohrelemente nacheinander gehoben werden, um das folgende Mastrohrelement anfügen zu können, kompliziert und auch störanfällig sind.Known transportable radio masts mainly suffer from the fact that their lifting device accommodated in the tripod head, 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.

Dies rührt daher, dass die Hebevorrichtung gewöhnlich einen Zahntrieb mit Zahnstange und Ritzel aufweist, dessen Funktion bei Verschmutzung beeinträchtigt wird. Besonders bei militärischen Anwendungen kann dieser Nachteil eine ausschlaggebende Rolle spielen.This is due to the fact that the lifting device usually has a pinion with rack and pinion, the function of which is impaired when contaminated. Especially at This disadvantage can play a decisive role in military applications.

Mit der vorliegenden Erfindung sollen diese Mängel vermieden werden.These deficiencies are to be avoided with the present invention.

Der erfindungsgemässe Mast ist dadurch gekennzeichnet, dass seine Hebe- und Senkvorrichtung drei ringförmige, das Mastrohr umschliessende Friktionsklinken aufweist, die innerhalb des Stativkopfes in der Längsrichtung der Mastrohrelemente übereinanderliegend angeordnet sind, wobei die obere Friktionsklinke als Tragklinke dient, einen mit der mittleren Friktionsklinke in Wirkverbindung stehenden, manuell betätigbaren Hebedaumen aufweist und an ihrer dem Hebedaumen gegenüberliegenden Seite schwenkbar gelagert ist, dass im Stativkopf ein mit der unteren, als Hubklinke dienenden Friktionsklinke in Wirkverbindung stehender, manuell betätigbarer Hebedaumen schwenkbar gelagert ist, dass zwischen der Hubklinke und der mittleren, als Senkklinke dienenden Friktionsklinke Federmittel vorgesehen sind, die dazu bestimmt sind, die beiden Klinken in Berührung mit den genannten beiden Hebedaumen zu halten, und dass Mittel vorhanden sind, die die Hubklinke fixieren, sobald eine untere Stirnfläche eines Mastrohrelementes, die mit der benachbarten Stirnfläche eines nächstfolgenden Mastrohrelementes nicht in Berührung steht, eine bestimmte Stellung innerhalb des Stativkopfes erreicht hat.The mast according to the invention is characterized in that its lifting and lowering device has three ring-shaped friction pawls enclosing the mast tube, which are arranged one above the other within the tripod head in the longitudinal direction of the mast tube elements, the upper friction pawl serving as a carrying pawl, one in operative connection with the middle friction pawl has standing, manually operated lifting thumb and is pivotally mounted on its side opposite the lifting thumb, that in the tripod head, a friction thumb, which is operatively connected to the lower, serving as a lifting pawl, is pivotably mounted between the lifting pawl and the middle, as a lowering pawl Serving friction pawl spring means are provided which are intended to hold the two pawls in contact with the two lifting thumbs mentioned, and that means are present which fix the lifting pawl as soon as a lower end face of a Mast tube element, which is not in contact with the adjacent end face of a next mast tube element, a certain position within the Tripod head has reached.

Der Erfindungsgegenstand wird im folgenden unter Bezugnahme auf die Zeichnungen näher beschrieben. In diesen stellen dar:

  • Fig. 1 einen erfindungsgemässen Mast, im Gelände betriebsfertig aufgebaut,
  • Fig. 2 das Stativ des Mastes nach Fig. 1 mit dem obersten Mastrohrelement, dessen Spitze einen Kegelzapfen zur Aufnahme des Richtfunkgerätes aufweist,
  • Fig. 3 den Stativkopf im Schnitt mit der Hebe- und Senkvorrichtung für das Mastrohr,
  • Fig. 4 den Stativkopf im Grundriss,
  • Fig. 5 bis 10 die drei Friktionsklinken,jeweils im Grund-und Seitenriss,
  • Fig. 11 und 12 Funktionsschemata der Hebe- und Senkvorrichtung,
  • Fig. 13 die Verbindungselemente des Mastrohres,
  • Fig. 14 bis 19 die zum Verbinden der Mastrohrelemente erforderlichen Manipulationen, und
  • Fig. 20 einen Stativfuss, teilweise geschnitten.
The subject matter of the invention is described in more detail below with reference to the drawings. In these represent:
  • 1 a mast according to the invention, assembled ready for use in the field,
  • 2 the tripod of the mast according to FIG. 1 with the uppermost mast tube element, the tip of which has a tapered pin for receiving the directional radio,
  • 3 the tripod head in section with the lifting and lowering device for the mast tube,
  • 4 the tripod head in plan,
  • 5 to 10, the three friction pawls, each in the plan and side elevation,
  • 11 and 12 functional diagrams of the lifting and lowering device,
  • 13 the connecting elements of the mast tube,
  • 14 to 19 the manipulations required to connect the mast tube elements, and
  • Fig. 20 a tripod foot, partially cut.

Bei dem in Fig. l dargestellten Mast bezeichnen 1 das Stativ, 2 das Mastrohr, 3 Abspannseile, die über Umlenkrollen 5, 6, 7, 8, 9 zu einem Seilspanner 10 bekannter Bauart führen, mit dem die Seile 3 einzeln oder gemeinsam gespannt werden können. ll, 12 und 13 bezeichnen Seilhaspeln zum Aufspulen der Seile 3. Um die Stabilität des Mastrohres 2 bei stärkerem Wind zu gewährleisten, werden nach erfolgtem Aufrichten des Mastrohres Seile 4 an den Verankerungspunkten 5, 6 und 7 befestigt und von Hand gespannt.In the mast shown in Fig. 1 denote 1 the tripod, 2 the mast tube, 3 guy ropes that lead via pulleys 5, 6, 7, 8, 9 to a rope tensioner 10 of known type, with which the ropes 3 are tensioned individually or together can. II, 12 and 13 denote reels for winding the ropes 3. In order to ensure the stability of the mast tube 2 in stronger winds, after the mast tube has been erected, ropes 4 are fastened to the anchoring points 5, 6 and 7 and tensioned by hand.

Das in Fig. 2 dargestellte Stativ 1 weist drei in der Länge verstellbare Beine 14 auf, deren Verstellmechanismus weiter unten beschrieben ist. Auf einer gemeinsamen Kopfplatte 15 ist der Stativkopf 16 drehbar gelagert, um den Mast 2, von dem in Fig. 2 das oberste Mastrohrelement 17 in seiner Aus- .gangsstellung gezeigt ist, in die gewünschte Azimutrichtung drehen zu können. Am oberen Ende des Mastrohrelementes 17 . erkennt man ferner einen Kegelzapfen 18 sowie zwei Schäkelplatten 19 zur Befestigung der Abspannseile 3 und 4. Gelenkig gelagerte Pratzen 20 gewährleisten einen sicheren Stand der Stativbeine 14.The stand 1 shown in FIG. 2 has three legs 14 which are adjustable in length and whose adjustment mechanism 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. At the upper end of the mast tube element 17. one can also see 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 zeigt den Stativkopf 16 mit der darin untergebrachten Hebe- und Senkvorrichtung für das Mastrohr 2 sowie mit dem Mastrohrelement 17. Auf der Kopfplatte 15 ist eine Grundplatte 21 drehbar gelagert, wobei eine Kunststoffscheibe 22 den senkrechten Achsialschub und eine Kunststoffbüchse 23 die waagrechten Kräfte aufnimmt. In der Grundplatte 21 ist eine Ringnut 24, in der sich Gleitsteine 25 mit Innengewinde befinden, die in Verbindung mit Schrauben 26, die durch die Kopfplatte 15 nach oben ragen, ein Festklemmen der Grundplatte 21 ermöglichen. Eine am Schraubenende befestigte Scheibe 27 verhindert, dass die Schraube 26 vollständig herausgedreht werden kann.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. On the head plate 15, a base plate 21 is rotatably supported, a plastic disc 22 the vertical axial thrust and a plastic bushing 23 the horizontal forces records. In 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.

Von den drei Friktionsklinken dient die obere Klinke 28 zum Tragen des Mastrohres, die mittlere Klinke 29 zum Senken und die obere Klinke 30 zum Heben des Mastrohres 17. Dementsprechend werden diese Klinken als Tragklinke, Senkklinke bzw. Hubklinke bezeichnet. Diese Klinken sind in den Fig. 5 bis 10 einzeln im Grund- und Seitenriss dargestellt. Die Tragklinke 28 weist einen um einen Bolzen 31 schwenkbaren Hebedaumen 32 auf mit einer Gewindebohrung 33, in die ein Hebelrohr zur Betätigung des Hebedaumens 32 eingeschraubt werden kann. Auf der dem Hebedaumen 32 gegenüberliegenden Seite weist die Tragklinke 28 zwei Lappen 34 auf (siehe Fig. 6), mit denen sich die Tragklinke auf einen im Gehäuse 35 gelagerten Bolzen 36 abstützt.Of the three friction pawls, the upper pawl 28 serves to carry the mast tube, the middle pawl 29 for lowering and the upper 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 FIGS. 5 to 10 in plan and side view. 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. 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.

Zwischen einem Gehäusedeckel 37 und der Tragklinke 28 befinden sich zwei in Serie angeordnete Tellerfedern 38 und auf der Seite des Hebedaumens 32 sind zwei Schraubendruckfedern 39 zwischen Gehäusedeckel und Tragklinke eingespannt. Hierzu sind in der Tragklinke 28 zwei aus Fig. 5 ersichtliche Führungszapfen 40 vorgesehen.Between a housing cover 37 and the support pawl 28 there are two disc springs 38 arranged in series and on the side of the lifting thumb 32 two helical compression springs 39 are clamped between the housing cover and the support pawl. For this purpose, two guide pins 40 shown in FIG. 5 are provided in the support pawl 28.

Die in den Fig. 7 und 8 im Detail dargestellte Senkklinke 29 trägt auf einer Seite eine mit dem Hebedaumen 32 zusammenwirkende Rolle 4l und auf der gegenüberliegenden Seite zwei Gewindestifte 42 mit Muttern 43 zum Fixieren der Gewindestifte 42, die als Klinkendrehpunkte dienen.The countersunk pawl 29 shown in detail in FIGS. 7 and 8 carries on one side a roller 4l which interacts 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.

Die in den Fig. 9 und 10 im Detail dargestellte Hubklinke 30 ist im wesentlichen spiegelverkehrt gleich wie die Senkklinke 29 ausgeführt, besitzt aber zusätzlich an der ihrer Rolle 44 entgegengesetzten Seite eine gerade Schneide 45.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.

4 Die Klinken 28, 29 und 30 sind mit einer zur Klinkenebene um einige Grad geneigten Bohrung 46, 47 bzw. 48 versehen, welche das Mastrohr umschliessen und in bekannter Weise ein Verkanten und eine Selbsthemmung auf dem Mastrohr ermöglichen. Die Hubklinke 30 weist ebenfalls zwei Gewindestifte 49 und Muttern 50 zu deren Fixierung auf, wobei diese Gewindestifte ebenfalls als Klinkendrehpunkte dienen.4 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 enable 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.

Unterhalb der Hubklinke 30 befindet sich ein auf einem Bolzen 51 schwenkbar gelagerter Hebedaumen 52 mit einer Gewindebohrung 53, die zur Aufnahme eines Hebelrohrs bestimmt ist. Die beiden, in den Fig. 11 und 12 schematisch dargestellten Hebelrohre 54 und 55 für die Hebedaumen 32 bzw. 52 können durch eine Oeffnung im Stativkopf 16 eingeführt werden, die durch ein Türchen 56 verschliessbar ist.Below the jack 30 is one on one Bolt 51 pivotally mounted lifting thumb 52 with a threaded bore 53 which is intended for receiving 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.

Zwischen der Senkklinke 29 und der Hubklinke 30 sind eine das Mastrohrelement 17 umschliessende Schraubendruckfeder 57 sowie zwei kleinere Schraubendruckfedern 58, deren Enden in Ausnehmungen 59 bzw. 60 liegen, eingespannt. In den Fig. 11 und 12 sind die Federn 58 nicht gezeigt.A helical compression spring 57 enclosing the mast tube element 17 and two smaller helical compression springs 58, the ends of which lie in recesses 59 and 60, respectively, are clamped between the countersink pawl 29 and the lifting pawl 30. 11 and 12, the springs 58 are not shown.

Auf der den Hebedaumen gegenüberliegenden Seite befindet sich ein Fanghebel 61, der um den Bolzen 36 schwenkbar gelagert ist. Sein unterer Teil ist als Nase 62 ausgebildet und im mittleren Teil weist er eine Reihe von Rastzähnen 63 auf, die dazu bestimmt sind, mit der Schneide 45 der-Hubklinke 30 zum Eingriff zu kommen. In der Wand des Gehäuses 35 sitzt eine Schraubendruckfeder 64, die durch eine Schraube 65 gehalten wird. Die Feder 64 drückt die Nase 62 des Fanghebels 61 gegen die Aussenfläche des Mastrohrelementes 17.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 number of locking teeth 63 which are intended to come into engagement with the cutting edge 45 of the lifting pawl 30. 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.

Die Wirkungsweise der Hebe- und Senkvorrichtung und des Fanghebels geht aus den Fig. 11 und 12 hervor. Beim Hinunterdrücken des Hebelrohres 55 drückt der'Hebedaumen 53 zunächst die Rolle 44 und damit die Hubklinke 30 nach oben, wobei gleichzeitig durch die von der Feder 58 auf die Senkklinke 29 übertragene Kraft diese im Uhrzeigersinn geschwenkt wird. Diese Bewegung überträgt sich über die Rolle 4l und den Hebedaumen 32 auf die Tragklinke 28, die sich ebenfalls im Uhrzeigersinn dreht und dadurch das Mastrohrelement 17 freigibt, das bei weiterem Hinunterdrücken des Hebelrohres 55 durch die Hubklinke 30, die inzwischen das Mastrohrelement 17 klemmend erfasst hat, nach oben schiebt. Beim folgenden Aufwärtsziehen des Hebelrohres 55 läuft dieser Vorgang sinngemäss umgekehrt ab, wobei zunächst die Tragklinke 28 zur Wirkung kommt und anschliessend die Hubklinke das Mastrohrelement freigibt.The mode of operation of the lifting and lowering device and the catch lever can be seen from FIGS. 11 and 12. When going down pressing the lever tube 55, the lifting thumb 53 first presses the roller 44 and thus the lifting pawl 30 upwards, which is simultaneously pivoted clockwise by the force transmitted from the spring 58 to the lowering pawl 29. This movement is transmitted via the roller 4l and the lifting thumb 32 to the pawl 28, which also rotates clockwise and thereby releases the mast tube element 17, which, when the lever tube 55 is pressed down further, by the lifting pawl 30, which has meanwhile clamped the mast tube element 17 , pushes up. When 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.

Zum Senken des Mastrohrs wird das Hebelrohr 54 nach unten geschwenkt, wodurch zunächst die Senkklinke 29 zum klemmenden Eingriff mit dem Mastrohrelement 17 gelangt und anschliessend die Hubklinke 30 und die Tragklinke 28 freigegeben werden, so dass beim weiteren Hinunterstossen des Hebelrohrs 54 der Mast abgesenkt wird.To lower the mast tube, 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.

Die Tellerfedern 38 und die Schraubendruckfedern 39, 57 und 58 dienen dazu, die Klinken gegeneinander zu verspannen und sie in der für die Funktion erforderlichen Stellung zu halten.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.

Die beiden Gewindestifte 42 und 49 mit den dazugehörigen Muttern 43 bzw. 50 dienen zum Einstellen der gegenseitigen Lage der Klinken, insbesondere zur Anpassung an den Mastrohrdurchmesser zum Ausgleich von Durchmessertoleranzen.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.

Der Fanghebel 61 hat die Aufgabe, die Hubklinke 30 wie in Fig. 12 gezeigt festzuhalten, wenn das nachfolgende Mastrohrelement 67 nicht einwandfrei, d.h., mit seiner Stirnfläche fugenlos an die Stirnfläche 66 des oberen Rohrelementes anstossend, mit letzterem verbunden ist. In diesem Falle drückt die Feder 64 (Fig. 3) den Fanghebel in die in Fig. 12 gezeigte Stellung, wobei die Schneide 45 (Fig. 3) der Hubklinke 30 in eine der Rastzähne 63 einrastet.The catch lever 61 has the task of holding the lifting pawl 30 as shown in FIG. 12 if the subsequent mast tube element 67 is not connected to the latter in an impeccable manner, i.e. with its end face butting against the end face 66 of the upper tube element. In this case, 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 engaging in one of the locking teeth 63.

Wird die Hubklinke in dieser Position über den Hebedaumen 52 betätigt, so schwenkt sie so lange leer auf und ab, bis die Rohrelemente ordnungsgemäss verbunden sind, d.h., bis ihre benachbarten Stirnflächen ohne Spalt aneinanderstossen. Dadurch wird einem fehlerhaften Zusammenbau des Mastrohrs vorgebeugt und verhindert, dass das jeweils unterste Mastrohrelement bei Unaufmerksamkeit aus dem Stativkopf herausgehoben wird.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.

Die Fig. 13 zeigt die Verbindungselemente zum Zusammenbau der Mastrohrelemente. Sie bestehen aus einem Zuganker 68 mit einem Bund 69 und einem Schraubengewinde 73, das mit dem Innengewinde eines Spannkegels 74 zusammenwirkt. Der Zuganker, dessen Kopf einen Schlitz zur Aufnahme eines entsprechenden Schlüssels aufweist, stützt sich mit seinem Bund 69 auf den im Mastrohrelement befestigten Stützring 70 ab und ist in achsialer Richtung durch einen mittels Schrauben 72 befestigten Deckel 71 gesichert.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 with the internal thread of a clamping cone 74 cooperates. 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.

Die Fluchtung der miteinander zu verbindenden Mastrohrelemente 17 und 67 ist durch eine mit dem Rohrelement 67 verbundene Spreizhülse 75 gewährleistet, die im unteren Teil zylindrisch ausgebildet ist und im oberen Teil einen Innenkegel aufweist, in den der Spannkegel 74 eingesetzt ist. Die Spannhülse 75 weist einen Längsschlitz 76 auf, in den eine als Verdrehsicherung wirkende, nicht dargestellte Nase des Spannkegels 74 eingreift. Beim Anziehen des Zugankers 68 mittels des in den Fig. 16 und 19 dargestellten Schlüssels 77 wird das obere Mastrohrelement 17 gegenüber dem unteren Mastrohrelement 67 zentriert und verspannt. Die Fig. 14 bis 19 zeigen schematisch die Manipulationen beim Verbinden bzw. Trennen zweier benachbarter Mastrohrelemente 17 und 67.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, in which a nose of the clamping cone 74, which acts as an anti-rotation lock and engages, engages. When the tie rod 68 is tightened by means of the key 77 shown in FIGS. 16 and 19, the upper mast tube element 17 is centered and braced relative to the lower mast tube element 67. 14 to 19 schematically show the manipulations when connecting or disconnecting two adjacent mast tube elements 17 and 67.

Die Fig. 20 zeigt ein Bein 14 des Stativs und den Verstellmechanismus für die Einstellung der Beinlänge. Es trägt an seinem unteren Ende eine Pratze 21, die an einem verschiebbaren Rohr 78 schwenkbar gelagert ist und für den sicheren Stand des Stativs sorgt. Dieses Rohr 78 ist in seinem oberen Teil mit einer Reihe von Querbohrungen zur Aufnahme eines Bolzens 80 versehen, dessen beidseitig überstehende Enden in zwei einander diametral gegenüberliegenden Längsschlitzen eines äusseren Führungsrohres 79 in der Achsrichtung des Stativbeins verschiebbar sind. Auf dem mit einem Aussengewinde versehenen Führungsrohr 79 ist oberhalb des Bolzens 80 ein mit einer Rändelmutter 82 verbundenes Schutzrohr 81 und unterhalb des Bolzens 80 eine Rändelmutter 83 vorgesehen. Durch Verspannen der beiden Rändelmuttern 82 und 83 gegen den Bolzen 80 kann die eingestellte Beinlänge fixiert und das Stativbein starr gemacht werden.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 in its upper one Partly provided with a series of transverse bores for receiving a bolt 80, the ends of which protrude on both sides can be displaced in the longitudinal direction of the tripod leg in two diametrically opposed longitudinal slots of an outer guide tube 79. On the guide tube 79 provided with an external thread, a protective tube 81 connected to a knurled nut 82 is provided above the bolt 80 and a knurled nut 83 below the bolt 80. By tightening the two knurled nuts 82 and 83 against the bolt 80, the leg length set can be fixed and the tripod leg can be made rigid.

B e z e i c h n u n g s l i s t eB e z e i c h n u n g s l i s t e

  • 1 Stativ1 tripod
  • 2 Mastrohr2 mast tube
  • 3 Abspannseil3 guy rope
  • 4 Abspannseil4 guy rope
  • 5 Umlenkrolle5 pulley
  • 6 Umlenkrolle6 pulley
  • 7 Umlenkrolle7 pulley
  • 8 Umlenkrolle8 pulley
  • 9 Umlenkrolle9 pulley
  • 10 Seilspannwinde10 winch
  • 11 Seilspannwinde11 winch
  • 12 Seilspannwinde12 winch
  • 13 Seilspannwinde13 winch
  • 14 Stativbeine14 tripod legs
  • 15 Kopfplatte15 head plate
  • 16 Stativkopf16 tripod head
  • 17 Mastrohrelement17 mast tube element
  • 18 Kegelzapfen18 tapered pins
  • 19 Schäkelplatte19 shackle plate
  • 20 Pratze20 claws
  • 21 Grundplatte21 base plate
  • 22 Kunststoffscheibe22 plastic disc
  • 23 Kunststoffbüchse23 plastic rifle
  • 24 Ringnut24 ring groove
B e z e i c h n u n g s l i s t eB e z e i c h n u n g s l i s t e

  • 25 Gleitstein25 sliding block
  • 26 Schraube26 screw
  • 27 Scheibe27 disc
  • 28 Tragklinke28 pawl
  • 29 Senkklinke29 countersunk pawl
  • 30 Hubklinke30 lifting pawl
  • 31 Bolzen31 bolts
  • 32 Hebedaumen32 lifting thumbs
  • 33 Bohrung33 hole
  • 34 Lappen34 rags
  • 35 Gehäuse35 housing
  • 36 Bolzen36 bolts
  • 37 Gehäusedeckel37 housing cover
  • 38 Tellerfeder38 disc spring
  • 39 Schraubendruckfeder39 helical compression spring
  • 40 Führungszapfen40 guide pins
  • 41 Rolle41 roll
  • 42 Gewindestift42 grub screw
  • 43 Mutter43 mother
  • 44 Rolle44 roll
  • 45 Schneide45 cutting edge
  • 46 Bohrung46 hole
  • 47 Bohrung47 hole
B e z e i c h n u n g s l i s t eB e z e i c h n u n g s l i s t e

  • 48 Bohrung48 hole
  • 49 Gewindestift49 grub screw
  • 50 Mutter50 mother
  • 51 Bolzen51 bolts
  • 52 Hebedaumen52 lifting thumb
  • 53 Bohrung53 hole
  • 54 Hebelrohr54 lever tube
  • 55 Hebelrohr55 lever tube
  • 56 Türchen56 doors
  • 57 Schraubendruckfeder57 helical compression spring
  • 58 Schraubendruckfeder58 helical compression spring
  • 59 Ausnehmung59 recess
  • 60 Ausnehmung60 recess
  • 61 Fanghebel61 safety catch
  • 62 Nase62 nose
  • 63 Rastzähne63 ratchet teeth
  • 64 Schraubendruckfeder64 helical compression spring
  • 65 Schraube65 screw
  • 66 Stirnfläche66 end face
  • 67 Mastrohrelement67 mast tube element
  • 68 Zuganker68 tie rods
  • 69 Bund69 fret
  • 70 Stützring70 support ring
B e z e i c h n u n g s l i s t eB e z e i c h n u n g s l i s t e

  • 71 Deckel71 cover
  • 72 Schraube72 screw
  • 73 Gewinde73 threads
  • 74 Spannkegel74 clamping cone
  • 75 Spreizhülse75 expansion sleeve
  • 76 Längsschlitz76 longitudinal slot
  • 77 Schlüssel77 keys
  • 78 Rohr78 tube
  • 79 Führungsrohr79 guide tube
  • 80 Bolzen80 bolts
  • 81 Schutzrohr81 protective tube
  • 82 Rändelmutter82 knurled nut
  • 83 Rändelmutter83 knurled nut

Claims (3)

I. Transportabler Mast, insbesondere für Richtfunkanlagen, mit einem Stativ und drehbarem Stativkopf, einer im Stativkopf untergebrachten Mastrohrhebe- und-senkvorrichtung, zusammensteck- und verspannbaren Mastrohrelementen und Abspannelementen für die Fixierung des Mastes am Aufstellort, dadurch gekennzeichnet, dass seine Hebe-und Senkvorrichtung drei ringförmige, das Mastrohr umschliessende Friktionsklinken (28, 29, 30) aufweist, die innerhalb des Stativkopfes (16) in der Längsrichtung der Mastrohrelemente (17, 67) übereinanderliegend angeordnet sind, wobei die obere Friktionsklinke als Tragklinke (28) dient, einen mit der mittleren Friktionsklinke (29) in Wirkverbindung stehenden, manuell betätigbaren Hebedaumen (32) aufweist und an ihrer dem Hebedaumen (32) gegenüberliegenden Seite schwenkbar gelagert ist, dass im Stativkopf (16) ein mit der unteren, als Hubklinke (30) dienenden Friktionsklinke in Wirkverbindung stehender, manuell betätigbarer Hebedaumen,(52) schwenkbar gelagert ist, dass zwischen der Hubklinke (30) und der mittleren, als Senkklinke (29) dienenden Friktionsklinke Federmittel (57, 58) vorgesehen sind, die dazu bestimmt sind, die beiden Klinken (29, 30) in Berührung mit den genannten beiden Hebedaumen (32, 52) zu halten, und dass Mittel (36, 45, 61, 64, 65) vorhanden sind, die die Hubklinke (30) fixieren, sobald eine untere Stirnfläche (66) eines Mastrohrelementes (17), die mit der benachbarten Stirnfläche eines nächstfolgenden Mastrohrelementes (67) nicht in Berührung steht, eine bestimmte Stellung innerhalb des Stativkopfes (16) erreicht hat.I. Transportable mast, in particular for directional radio systems, with a tripod and rotatable tripod head, a mast tube lifting and lowering device housed in the tripod head, pluggable and clampable mast tube elements and guy elements for fixing the mast at the installation site, characterized in that its lifting and lowering device has three annular friction pawls (28, 29, 30) surrounding the mast tube, which are arranged one above the other within the tripod head (16) in the longitudinal direction of the mast tube elements (17, 67), the upper friction pawl serving as a carrying pawl (28), one with the middle friction pawl (29) is operatively connected to the manually actuable lifting thumb (32) and is pivotably mounted on its side opposite the lifting thumb (32) in the tripod head (16) with a lower friction pawl serving as the lifting pawl (30) in Active connection of standing, manually operated lifting thumb, (52) is pivotally mounted t that spring means (57, 58) are provided between the lifting pawl (30) and the central friction pawl, which serves as a lowering pawl (29) and are intended to bring the two pawls (29, 30) into contact with the two lifting thumbs ( 32, 52) and that means (36, 45, 61, 64, 65) are present which fix the lifting pawl (30) as soon as a lower end face (66) of a mast tube element (17), which is not in contact with the adjacent end face of a next mast tube element (67), a certain position within the tripod head (16) has reached. 2. Mast nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel zur Fixierung der Hubklinke (30) aus einem durch eine Schraubendruckfeder (64) belasteten, um einen Bolzen (36) schwenkbar gelagerten Fanghebel (61) mit einer Nase (62) und Rastzähnen (63) sowie aus einer an der Hubklinke (30) vorgesehenen Schneide (45) bestehen.2. Mast according to claim 1, characterized in that the means for fixing the lifting pawl (30) from a by a helical compression spring (64) loaded by a bolt (36) pivotally mounted catch lever (61) with a nose (62) and locking teeth (63) and consist of a cutting edge (45) provided on the lifting pawl (30). 3. Mast nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass zur Verbindung der Mastrohrelemente (17, 67) eine Spreizhülse (75) mit einem Innenkegel, ein zum Zusammenwirken mit diesem Innenkegel bestimmter Spannkegel (74) mit einer Gewindeböhrung, ein zum Verschrauben in dieser Gewindebohrung bestimmter Zuganker (68) sowie Mittel (70, 71, 72) zur achsialen Fixierung des Zugankers (68) im Mastrohrelement (17, 67) vorgesehen sind.3. Mast according to claim 2 or 3, characterized in that for the connection of the mast tube elements (17, 67) an expansion sleeve (75) with an inner cone, a clamping cone (74) with a threaded hole for cooperation with this inner cone, a for screwing in this threaded hole of certain tie rods (68) and means (70, 71, 72) for axially fixing the tie rod (68) in the mast tube element (17, 67) are provided.
EP78200068A 1977-08-04 1978-06-29 Transportable mast, especially for directional broadcast installations Expired EP0000793B1 (en)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=4353318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78200068A Expired EP0000793B1 (en) 1977-08-04 1978-06-29 Transportable mast, especially for directional broadcast installations

Country Status (6)

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

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EP0057002A2 (en) * 1981-01-28 1982-08-04 Salzgitter Maschinenbau Gmbh Telescopic antenna mast
FR2575147A1 (en) * 1984-12-26 1986-06-27 Mathellier Gervais Variable-height tripod, intended to raise lighting equipment or any other loads
EP0243244A1 (en) * 1986-04-24 1987-10-28 Laboratoire D'etudes Et De Recherches Chimiques L.E.R.C. S.A. Lifting method for a multisectional mast, means for carrying out the method and masts with these means
FR2634863A1 (en) * 1988-07-29 1990-02-02 Lerc Lab Etudes Rech Chim Underframe for an antenna mast, antenna mast provided with this underframe and method for erecting such a mast provided with this underframe

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DE3319330C2 (en) * 1983-05-27 1986-01-23 Südwestfunk, Anstalt des öffentlichen Rechts, 7570 Baden-Baden Antenna system, in particular for filling transmitters and receiving stations
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
GB8720658D0 (en) * 1987-09-02 1987-10-07 C S Antennas Ltd Telescopic masts
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)
US20120132780A1 (en) * 2009-05-11 2012-05-31 Secobel Base for a transportable mast and a mast assembly comprising such a base
EP2824325B1 (en) * 2013-07-11 2017-10-18 Siemens Aktiengesellschaft Tower section storage
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

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GB705598A (en) * 1951-02-13 1954-03-17 John Hunt Theakston Improvements in masts, poles and the like and the erection thereof
DE962197C (en) * 1952-09-27 1957-04-18 Braselmann Fa Ferd Lifting device with clamp switch mechanism
DE1037098B (en) * 1952-11-11 1958-08-21 Hans Utz Clamping hoist with return device
CH336571A (en) * 1957-02-02 1959-02-28 Mewag Metallwarenfabrik Ag Hoist
US3320703A (en) * 1964-08-26 1967-05-23 Collins Radio Co Device for raising or lowering antenna mast
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EP0057002A2 (en) * 1981-01-28 1982-08-04 Salzgitter Maschinenbau Gmbh Telescopic antenna mast
DE3201067A1 (en) * 1981-01-28 1982-08-12 Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter TELESCOPICABLE PORT
EP0057002A3 (en) * 1981-01-28 1982-10-06 Salzgitter Maschinen Und Anlagen Aktiengesellschaft Telescopic antenna mast
FR2575147A1 (en) * 1984-12-26 1986-06-27 Mathellier Gervais Variable-height tripod, intended to raise lighting equipment or any other loads
EP0243244A1 (en) * 1986-04-24 1987-10-28 Laboratoire D'etudes Et De Recherches Chimiques L.E.R.C. S.A. Lifting method for a multisectional mast, means for carrying out the method and masts with these means
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FR2634863A1 (en) * 1988-07-29 1990-02-02 Lerc Lab Etudes Rech Chim Underframe for an antenna mast, antenna mast provided with this underframe and method for erecting such a mast provided with this underframe

Also Published As

Publication number Publication date
IT1097412B (en) 1985-08-31
DE2738317A1 (en) 1979-02-15
CH616984A5 (en) 1980-04-30
DE7726367U1 (en) 1979-05-10
US4212015A (en) 1980-07-08
EP0000793B1 (en) 1981-02-11
CA1105612A (en) 1981-07-21
IT7826106A0 (en) 1978-07-26

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