EP1160396A2 - Mast for support structure - Google Patents

Mast for support structure Download PDF

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Publication number
EP1160396A2
EP1160396A2 EP01105398A EP01105398A EP1160396A2 EP 1160396 A2 EP1160396 A2 EP 1160396A2 EP 01105398 A EP01105398 A EP 01105398A EP 01105398 A EP01105398 A EP 01105398A EP 1160396 A2 EP1160396 A2 EP 1160396A2
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EP
European Patent Office
Prior art keywords
mast
pressure
sleeve
piece
sections
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
EP01105398A
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German (de)
French (fr)
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EP1160396B1 (en
EP1160396A3 (en
Inventor
Karsten Gierss
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Individual
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Individual
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Publication of EP1160396A3 publication Critical patent/EP1160396A3/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
    • E04H3/00—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons
    • E04H3/10—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons for meetings, entertainments, or sports
    • E04H3/22—Theatres; Concert halls; Studios for broadcasting, cinematography, television or similar purposes
    • E04H3/24—Constructional features of stages
    • 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
    • E04H12/18—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures movable or with movable sections, e.g. rotatable or telescopic
    • E04H12/185—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures movable or with movable sections, e.g. rotatable or telescopic with identical elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/55—Member ends joined by inserted section
    • Y10T403/557—Expansible section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7041—Interfitted members including set screw

Definitions

  • the invention relates to a mast for a carrying device with straps that run over a runner on the mast in the Height are movable and for mounting stage technology Equipment are used, the mast consisting of several pipe sections of the same diameter, which is connected to the Seams aligned with each other through an inner tube piece and are connected to each other.
  • the present invention is therefore based on the object to design a carrying device of the type mentioned at the outset, that the masts, which are made up of sections, are extreme can be mounted stably.
  • This configuration allows it in an extremely simple manner along a radial plane through the center of the inner tube piece gradually convert the pressure forces introduced into forces, which spreads the sleeve over its entire diameter lead and not just jamming in the area of Effect slit. This configuration therefore ensures tight, tight and play-free fitting of the inner tube piece on the mast sections in the area of their seams.
  • the thus constructed mast can be as stable as a continuous one one-piece mast can be built.
  • the pressure screw in one through the slot radial plane and lie on in this way bring about the desired distribution of the spreading forces.
  • the length of the inner tube piece can also several pressure screws, preferably two, are provided be, each at the same axial distance from the The seam of the stacked mast sections runs.
  • the outer contour of Pressure and counter pressure pieces each have a circular cylinder surface his. This allows the use of prefabricated profile parts.
  • the pressure piece can be attached to a pressure screw be provided with a nut resting on a guide piece is provided, the pressure piece on the guide piece becomes.
  • the pressure piece on the opposite side Side an axial stop may be provided, the in turn on a rectangular profile lying against the pipe wall is present. This configuration prevents the Thread guide when adjusting the pressure screw.
  • the inner tube piece can also be used Openings for the passage of a turning tool for the pressure screw and it can have at least one, in particular radial bolts protruding from the central transverse plane be provided as an axial stop when assembling the Mast sections in a recess at the interface between engages adjacent mast sections.
  • This configuration ensures the correct arrangement of the inner tube in the Longitudinal direction of the mast sections and at the same time allows that the openings for passing a turning tool in a position in which they come with corresponding openings aligned in the mast sections.
  • the attack head for the Actuation of the pressure screw to provide an extension sleeve, through the openings provided in the mast sections engages and therefore to axially secure the mast sections against each other contributes, especially when, besides the usual expected pressure forces on the mast sections tensile forces may also be necessary.
  • This can be the case, for example, if the masts are not only for guiding beams indoors, but for arrangement of an outdoor roof and serve wind forces on it the roof act, can lead to tensile forces in the masts.
  • the extension sleeve should, however, to ensure the flawless free guidance of the runner for the supporting structure, if such is provided to secure, not over the outer contour the mast sections must be led to the outside.
  • Fig. 1 is a support device 1 for stage technology Devices shown, which consist of vertically movable beams 2 and from these beams 2 masts holding in their vertical position 3 is constructed.
  • a connecting pipe piece 6 fastened with a stand 7 in the one known from German utility model 92 178 65 Is equipped.
  • connection piece 7a of the joint part 7 and the first section 3a of the mast is in the area the interface 8 and at the interface 8 between first section 3a and second section 3a 'each in the Sections 3a, 3a 'and 7a an inner tube piece in the form a sleeve 9 inserted, as shown in FIGS. 4 and 5 and visible in Fig. 3 by dashed lines is made.
  • the mast 3 is at its upper end with a Headpiece 10 equipped, over which a rope or a chain 11 is guided, on the one hand firmly on the carrier 2 and on the other hand is held on a hoist 12 which, for example a winch or a chain hoist with which the length of the rope guided over the head piece 10 or Chain 11 is changeable, so that the height of the Beam 2 can be adjusted on the mast 3.
  • a hoist 12 which, for example a winch or a chain hoist with which the length of the rope guided over the head piece 10 or Chain 11 is changeable, so that the height of the Beam 2 can be adjusted on the mast 3.
  • Each carrier 2 is attached to a runner part 13, which in known Way (utility model 92 17 865) is guided on mast 3.
  • the sleeve 9 is, as Fig. 5 shows with a slot 14 running along a surface line provided, and therefore it represents what in particular from Fig. 6 can be seen, an enlarged in diameter Spreading part.
  • Both edges of the slot 14 are with Provide profiles 15, which, as Fig. 6 shows, as semicircular profiles are formed, the convex outer contour of the inside the sleeve 9 protrudes.
  • the profiles 15 are on the edges 16 of the slot 14 fixed, for example welded.
  • FIG. 6 or FIG. 4 In a radial plane running through the center of the slot 14 are, as can be seen in FIG. 6 or FIG. 4, two Pressure screws 17 arranged at the same distance from the interface 8. Of these pressure screws 17, only that is shown in FIG shown lower of Fig. 4. The upper pressure screw corresponds but that shown in Fig. 6.
  • the pressure screw 17 is on one provided at its ends with a thread 18, and it has one at its end opposite the thread 18 with their associated stop head 19 in the form of a welded Flanged nut against a flat profile 20 presses that with a through opening for the end of the Pressure screw 17 is provided, which has a hexagon socket 21 is provided for rotating the pressure screw 17.
  • a collar nut 22 is screwed onto the thread 18, which presses against a guide piece 23, which is held non-rotatably in the sleeve 9 and with a Pressure piece 24 is provided with a concave outer contour, which is pressed against the concave outer sides of the profiles 15 is.
  • the pressure piece 24 is part of a Semicircular profile.
  • the pressure bars 15 are of such Semicircular profiles formed with a circular cross-section.
  • the sleeve 9 is to the hexagon socket 21 for actuating the To make pressure screw 17 accessible, with a bore 25 provided after the installation of the sleeve 9 in the mast sections 3a, 3a 'with openings 26 in the mast sections is aligned so that the twist with a tool from the outside the pressure screw 17 is possible.
  • the sleeve 9 with an axially projecting pin shoulder 27 provided that after installation in semicircular Recesses 28 at the end of the mast sections 3a and 3a 'engages and thus ensures that the actuating openings 25 for the pressure screws also with the assigned Openings 26 in the mast sections are aligned.
  • the connecting sleeve 9 5 Before going into the mode of operation of the connecting sleeve 9 5 may be pointed out with reference to FIG be that at an edge 16 of the slot 14 spacer blocks 29 are attached, which serve to spread the To keep sleeve 9 under a certain bias, this is used to reduce the diameter of the sleeve 9 secure before assembly or disassembly.
  • the sleeve 9 is thereby also designed as a kind of spreading spring, which spread apart under the action of the pressure screw 17 and therefore can be enlarged in diameter, however their diameter below their inherent elasticity also reduced again when the pressure screw 17 is loosened becomes.
  • FIG. 6 clearly shows, is by a Rotation of the pressure screw 17 in one direction the collar nut 22 leads to a larger distance from the collar nut 19.
  • the pressure piece 24 with its convex outer contour pressed against the outer contour of the pressure strips 15, so that, as shown in FIG. 7, forces in the sense of arrows 30 exerted on the pressure pieces 15 and thus on the outer wall 9a become.
  • the mast sections 3a, 3a by the loads sitting on the supports 2, for example Headlights or the like, usually used under pressure.
  • the frictional forces exerted by the sleeve 9 serve hence the backlash-free assembly.
  • the frictional engagement can undoubtedly also absorb certain forces when train on the Mast 3 is exercised. This can be the case, for example be when on the beams 2 in the fully extended Position a roof is arranged and the whole carrying device not set up indoors, but outdoors becomes. In this case, wind forces can hit the roof occur that lead to a tensile load on the masts 3.

Abstract

Internal tubular joining sections (9) connecting tubular mast sections, comprise lengths of split tube. Inside them, is a transverse, internal screw jack (17). This works through a thrust pad (24) with convex external contour, against opposing thrust pads (15) fitted to edges of the split (14); these pads also being convex.

Description

Die Erfindung betrifft einen Mast für eine Tragvorrichtung mit Trägern, die über einen am Mast geführten Läufer in der Höhe verfahrbar sind und zur Halterung von bühnentechnischen Gerätschaften dienen, wobei der Mast aus mehreren Rohrabschnitten gleichen Durchmessers aufgebaut ist, die an den Nahtstellen durch ein Innenrohrstück zueinander ausgerichtet und untereinander verbunden sind.The invention relates to a mast for a carrying device with straps that run over a runner on the mast in the Height are movable and for mounting stage technology Equipment are used, the mast consisting of several pipe sections of the same diameter, which is connected to the Seams aligned with each other through an inner tube piece and are connected to each other.

Aus dem DE 9217865 U1 ist ein Tragvorrichtung dieser Art bekannt, bei der in Bodenteilen aufgestellte Masten vorgesehen sind und bei der zwischen Bodenteil und Mast ein Aufstellgelenk vorgesehen ist, das den Mast zur einfacheren Aufstellung kippbar mit einem Rohrstück des Bodenteils verbindet.DE 9217865 U1 discloses a carrying device of this type, provided for masts erected in floor parts and where there is an upright joint between the floor part and the mast It is provided that the mast for easier installation Tiltably connects to a pipe section of the bottom part.

Da solche Tragvorrichtungen z.B. bei Fernseh- oder Filmaufnahmen bis knapp unter die Deckenhöhe von Räumen gefahren werden müssten, werden die Masten in der Regel aus mehreren Abschnitten aufgebaut, um einen Transport der Tragvorrichtung zum und vom Aufstellungsort zu vereinfachen.Since such support devices e.g. for television or film recordings moved to just below the ceiling height of rooms masts are usually made up of several Sections built to carry the carrying device to simplify to and from the site.

Bei Tragvorrichtungen, die für große Lasten, beispielsweise für eine Reihe von Scheinwerfen o.dgl. gedacht sind, müssen entsprechend stabile Mastabschnitte verwendet werden, die spielfrei aneinandergehalten werden sollten, um die Stabilität zu sichern. Dies ist bisher nicht ausreichend sicher gelöst worden.In the case of carrying devices for large loads, for example for a number of headlamps or the like are thought must appropriately stable mast sections are used, the should be held together without play to ensure stability to secure. So far, this has not been solved with sufficient certainty been.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Tragvorrichtung der eingangs genannten Art so auszubilden, dass die Masten, die aus Abschnitten aufgebaut sind, äußerst stabil montiert werden können.The present invention is therefore based on the object to design a carrying device of the type mentioned at the outset, that the masts, which are made up of sections, are extreme can be mounted stably.

Zur Lösung dieser Aufgabe wird bei einem Mast für eine Tragvorrichtung der eingangs genannten Art vorgesehen, dass das Innenrohrstück aus einer längs einer Mantellinie geschlitzten Hülse besteht, die von einer Druckschraube durchsetzt ist, die über ein Druckstück mit konvexer Außenkontur auf am Rand des Schlitzes vorgesehene Gegendruckstücke mit ebenfalls konvexer Außenkontur einwirkt.To solve this problem is a mast for a support device of the type mentioned in the introduction that the Inner tube piece from a slotted along a surface line There is a sleeve which is penetrated by a pressure screw, the over a pressure piece with a convex outer contour on the edge of the slot provided counter pressure pieces with also convex External contour acts.

Diese Ausgestaltung erlaubt es in äußerst einfacher Weise die längs einer Radialebene durch die Mitte des Innenrohrstückes eingeleiteten Druckkräfte sukzessive in Kräfte umzusetzen, die zu einem Aufspreizen der Hülse über ihren ganzen Durchmesser führen und nicht nur ein Verklemmen im Bereich des Schlitzes bewirken. Diese Ausgestaltung sorgt daher für ein enges, straffes und spielfreies Anliegen des Innenrohrstückes an den Mastabschnitten im Bereich von deren Nahtstellen. Der so aufgebaute Mast kann dadurch so stabil wie ein durchgehender einstückiger Mast aufgebaut werden.This configuration allows it in an extremely simple manner along a radial plane through the center of the inner tube piece gradually convert the pressure forces introduced into forces, which spreads the sleeve over its entire diameter lead and not just jamming in the area of Effect slit. This configuration therefore ensures tight, tight and play-free fitting of the inner tube piece on the mast sections in the area of their seams. The thus constructed mast can be as stable as a continuous one one-piece mast can be built.

In Weiterbildung der Erfindung kann die Druckschraube in einer durch den Schlitz verlaufenden Radialebene liegen und auf diese Weise die gewünschte Verteilung der Spreizkräfte bewirken. Natürlich können über die Länge des Innenrohrstückes auch mehrere Druckschrauben, vorzugsweise zwei, vorgesehen werden, von denen jede im gleichen axialen Abstand zu der Nahtstelle der aneinander gesetzten Mastabschnitte verläuft. In a development of the invention, the pressure screw in one through the slot radial plane and lie on in this way bring about the desired distribution of the spreading forces. Of course, the length of the inner tube piece can also several pressure screws, preferably two, are provided be, each at the same axial distance from the The seam of the stacked mast sections runs.

In Weiterbildung der Erfindung kann die Außenkontur von Druck- und Gegendruckstücken jeweils eine Kreiszylinderfläche sein. Dies erlaubt die Verwendung vorgefertigter Profilteile. Das Druckstück kann dabei an einer Druckschraube angesetzt sein, die mit an einem Führungsstück anliegender Mutter versehen ist, wobei das Druckstück am Führungsstück vorgesehen wird.In a further development of the invention, the outer contour of Pressure and counter pressure pieces each have a circular cylinder surface his. This allows the use of prefabricated profile parts. The pressure piece can be attached to a pressure screw be provided with a nut resting on a guide piece is provided, the pressure piece on the guide piece becomes.

In Weiterbildung der Erfindung kann an der dem Druckstück gegenüberliegenden Seite ein Axialanschlag vorgesehen sein, der seinerseits an einem an der Rohrwand anliegenden Rechteckprofil anliegt. Diese Ausgestaltung verhindert ein Mitdrehen der Gewindeführung bei der Verstellung der Druckschraube.In a further development of the invention, the pressure piece on the opposite side Side an axial stop may be provided, the in turn on a rectangular profile lying against the pipe wall is present. This configuration prevents the Thread guide when adjusting the pressure screw.

In Weiterbildung der Erfindung kann das Innenrohrstück mit Öffnungen zum Durchführen eines Drehwerkzeuges für die Druckschraube versehen sein, und es kann mit mindestens einem, insbesondere von der Mittelquerebene abstehenden Radialbolzen versehen sein, der als ein Axialanschlag beim Zusammenbau der Mastabschnitte in eine Ausnehmung an der Nahtstelle zwischen benachbarten Mastabschnitten eingreift. Diese Ausgestaltung sichert die korrekte Anordnung des Innenrohrstückes in der Längsrichtung der Mastabschnitte zu und gewährt gleichzeitig, dass die Öffnungen zum Durchführen eines Drehwerkzeuges in eine Stellung kommen, in der sie mit korrespondierenden Öffnungen in den Mastabschnitten fluchten.In a further development of the invention, the inner tube piece can also be used Openings for the passage of a turning tool for the pressure screw and it can have at least one, in particular radial bolts protruding from the central transverse plane be provided as an axial stop when assembling the Mast sections in a recess at the interface between engages adjacent mast sections. This configuration ensures the correct arrangement of the inner tube in the Longitudinal direction of the mast sections and at the same time allows that the openings for passing a turning tool in a position in which they come with corresponding openings aligned in the mast sections.

Es ist schließlich auch noch möglich, am Angriffskopf für die Betätigung der Druckschraube eine Verlängerungshülse vorzusehen, die durch in den Mastabschnitten vorgesehenen Öffnungen greift und daher zur Axialsicherung der Mastabschnitte gegeneinander beiträgt, was insbesondere dann, wenn außer den üblicherweise zu erwartenden Druckkräften auf die Mastabschnitte auch Zugkräfte auftreten können, notwendig sein kann. Dies kann beispielsweise dann der Fall sein, wenn die Masten nicht nur zur Führung von Trägern in Innenräumen, sondern zur Anordnung eines Daches im Freien dienen und Windkräfte, die auf das Dach wirken, zu Zugkräften in den Masten führen können. Die Verlängerungshülse sollte dabei allerdings, um die einwandfreie freie Führung des Läufers für das Traggerüst, wenn ein solches vorgesehen ist, zu sichern, nicht über die Außenkontur der Mastabschnitte nach außen geführt sein.After all, it is also possible to use the attack head for the Actuation of the pressure screw to provide an extension sleeve, through the openings provided in the mast sections engages and therefore to axially secure the mast sections against each other contributes, especially when, besides the usual expected pressure forces on the mast sections tensile forces may also be necessary. This can be the case, for example, if the masts are not only for guiding beams indoors, but for arrangement of an outdoor roof and serve wind forces on it the roof act, can lead to tensile forces in the masts. The extension sleeve should, however, to ensure the flawless free guidance of the runner for the supporting structure, if such is provided to secure, not over the outer contour the mast sections must be led to the outside.

Die Erfindung ist anhand eines Ausführungsbeispieles in der Zeichnung dargestellt und wird im folgenden erläutert. Es zeigen:

Fig. 1
die Seitenansicht eines Teiles einer Tragvorrichtung für bühnentechnische Geräte mit einem Mast nach der Erfindung,
Fig. 2
die Draufsicht auf die Tragvorrichtung nach Fig. 1 in Richtung des Pfeiles II in Fig. 1,
Fig. 3
eine vergrößerte Darstellung der Nahtstelle zwischen zwei Mastabschnitten des Mastes nach Fig. 1,
Fig. 4
die Seitenansicht einer an der Maststelle in die Abschnitte des Mastes eingeschobenen Innenhülse,
Fig. 5
die um 180° versetzte Seitenansicht der Innenhülse der Fig. 4,
Fig. 6
eine vergrößerte Darstellung des Schnittes der längs der Linie VI-VI in Fig. 4,
Fig. 7
die vergrößerte Darstellung der Druckstückanordnung nach Fig. 6 und
Fig. 8
die Darstellung der Druckstückanordnung nach Fig. 7, jedoch in der Stellung während des Aufspreizvorganges der Hülse nach Fig. 6.
The invention is illustrated in the drawing using an exemplary embodiment and is explained below. Show it:
Fig. 1
the side view of part of a carrying device for stage equipment with a mast according to the invention,
Fig. 2
1 in the direction of arrow II in FIG. 1,
Fig. 3
2 shows an enlarged representation of the interface between two mast sections of the mast according to FIG. 1,
Fig. 4
the side view of an inner sleeve inserted into the sections of the mast at the mast point,
Fig. 5
4 shows the side view of the inner sleeve of FIG. 4 offset by 180 °,
Fig. 6
3 shows an enlarged representation of the section along the line VI-VI in FIG. 4,
Fig. 7
the enlarged view of the pressure piece arrangement according to FIGS. 6 and
Fig. 8
7, but in the position during the expansion process of the sleeve according to FIG. 6.

In der Fig. 1 ist eine Tragvorrichtung 1 für bühnentechnische Geräte gezeigt, die aus in der Höhe verfahrbaren Trägern 2 und aus diese Träger 2 in ihrer Vertikallage haltenden Masten 3 aufgebaut ist. Die Masten 3, von denen in den Fig. 1 und 2 jeweils nur einer gezeigt ist, bestehen dabei aus mehreren Abschnitten 3a gleichen Durchmessers und aus einem Fußstück 4 mit einstellbaren Stützspindeln 5, die Unebeneinheiten des Bodens ausgleichen können. An dem Fußstück 4 ist ein Anschlussrohrstück 6 befestigt, das mit einem Aufstellgelenk 7 in der aus dem deutschen Gebrauchsmuster 92 178 65 bekannten Art ausgerüstet ist. Zwischen dem Anschlussstutzen 7a des Gelenkteils 7 und dem ersten Abschnitt 3a des Mastes ist im Bereich der Nahtstelle 8 sowie an der Nahtstelle 8 zwischen erstem Abschnitt 3a und zweitem Abschnitt 3a' jeweils in die Abschnitte 3a, 3a' bzw. 7a einen Innenrohrstück in der Form einer Hülse 9 eingeschoben, wie sie aus den Fig. 4 und 5 ersichtlich und in Fig. 3 durch gestrichelte Linien sichtbar gemacht ist. Der Mast 3 ist an seinem oberen Ende mit einem Kopfstück 10 ausgerüstet, über das ein Seil oder eine Kette 11 geführt ist, die einerseits fest am Träger 2 und andererseits an einem Hebezeug 12 gehalten ist, welches beispielsweise eine Seilwinde oder ein Kettenzug sein kann, mit dem die über das Kopfstück 10 geführte Länge des Seiles oder der Kette 11 veränderbar ist, so dass dadurch die Höhenlage des Trägers 2 am Mast 3 eingestellt werden kann. Jeder Träger 2 ist dabei an einem Läuferteil 13 befestigt, das in bekannter Weise (Gebrauchsmuster 92 17 865) am Mast 3 geführt ist.In Fig. 1 is a support device 1 for stage technology Devices shown, which consist of vertically movable beams 2 and from these beams 2 masts holding in their vertical position 3 is constructed. The masts 3, of which in Figs. 1 and 2 only one is shown, consist of several Sections 3a of the same diameter and from a foot piece 4 with adjustable support spindles 5, the uneven units of the Can compensate for soil. At the foot piece 4 is a connecting pipe piece 6 fastened with a stand 7 in the one known from German utility model 92 178 65 Is equipped. Between the connection piece 7a of the joint part 7 and the first section 3a of the mast is in the area the interface 8 and at the interface 8 between first section 3a and second section 3a 'each in the Sections 3a, 3a 'and 7a an inner tube piece in the form a sleeve 9 inserted, as shown in FIGS. 4 and 5 and visible in Fig. 3 by dashed lines is made. The mast 3 is at its upper end with a Headpiece 10 equipped, over which a rope or a chain 11 is guided, on the one hand firmly on the carrier 2 and on the other hand is held on a hoist 12 which, for example a winch or a chain hoist with which the length of the rope guided over the head piece 10 or Chain 11 is changeable, so that the height of the Beam 2 can be adjusted on the mast 3. Each carrier 2 is attached to a runner part 13, which in known Way (utility model 92 17 865) is guided on mast 3.

Die Fig. 3 bis 5 machen nun deutlich, dass die aneinander stoßenden Mastabschnitte 3a und 3a' - analog auch die aneinander stoßenden Abschnitte 3a und 7a oder auch noch weitere - durch ein Innenrohrstück in der Form einer Hülse 9 fluchtend zueinander ausgerichtet sind, deren Außendurchmesser im Ausgangszustand geringfügig kleiner als der Innendurchmesser der Abschnitte 3a und 3a' ist. Die Hülse 9 ist, wie Fig. 5 zeigt, mit einem längs einer Mantellinie verlaufenden Schlitz 14 versehen, und sie stellt daher, was insbesondere auch aus Fig. 6 erkennbar ist, ein in seinem Durchmesser vergrößerbares Spreizteil dar. Beide Ränder des Schlitzes 14 sind mit Profilen 15 versehen, die, wie Fig. 6 zeigt, als Halbrundprofile ausgebildet sind, deren konvexe Außenkontur in das Innere der Hülse 9 hereinragt. Die Profile 15 sind an den Rändern 16 des Schlitzes 14 fest angebracht, beispielsweise angeschweißt.3 to 5 make it clear that the one another abutting mast sections 3a and 3a '- analogously also to each other abutting sections 3a and 7a or even more - aligned by an inner tube piece in the form of a sleeve 9 are aligned with each other, their outer diameter in the initial state slightly smaller than the inside diameter of the Sections 3a and 3a '. The sleeve 9 is, as Fig. 5 shows with a slot 14 running along a surface line provided, and therefore it represents what in particular from Fig. 6 can be seen, an enlarged in diameter Spreading part. Both edges of the slot 14 are with Provide profiles 15, which, as Fig. 6 shows, as semicircular profiles are formed, the convex outer contour of the inside the sleeve 9 protrudes. The profiles 15 are on the edges 16 of the slot 14 fixed, for example welded.

In einer durch die Mitte des Schlitzes 14 verlaufenden Radialebene sind, wie Fig. 6 oder Fig. 4 erkennen lassen, zwei Druckschrauben 17 im gleichen Abstand zur Nahtstelle 8 angeordnet. Von diesen Druckschrauben 17 ist in Fig. 6 nur die untere der Fig. 4 gezeigt. Die obere Druckschraube entspricht aber der in Fig. 6 gezeigten. Die Druckschraube 17 ist an einem ihrer Enden mit einem Gewinde 18 versehen, und sie weist an ihrem dem Gewinde 18 gegenüberliegenden Ende einen fest mit ihre verbundenen Anschlagkopf 19 in der Form einer angeschweißten Bundmutter auf, die gegen ein Flachprofil 20 drückt, das mit einer Durchgangsöffnung für das Ende der Druckschraube 17 versehen ist, welches mit einem Innensechskant 21 zur Verdrehung der Druckschraube 17 versehen ist. An dem dem Anschlagkopf 19 entgegengesetzten Ende der Druckschraube 17 ist auf das Gewinde 18 eine Bundmutter 22 aufgeschraubt, die innen gegen ein Führungsstück 23 drückt, welches unverdrehbar in der Hülse 9 gehalten ist und mit einem Druckstück 24 mit einer konkaven Außenkontur versehen ist, welches gegen die konkaven Außenseiten der Profile 15 gedrückt ist.In a radial plane running through the center of the slot 14 are, as can be seen in FIG. 6 or FIG. 4, two Pressure screws 17 arranged at the same distance from the interface 8. Of these pressure screws 17, only that is shown in FIG shown lower of Fig. 4. The upper pressure screw corresponds but that shown in Fig. 6. The pressure screw 17 is on one provided at its ends with a thread 18, and it has one at its end opposite the thread 18 with their associated stop head 19 in the form of a welded Flanged nut against a flat profile 20 presses that with a through opening for the end of the Pressure screw 17 is provided, which has a hexagon socket 21 is provided for rotating the pressure screw 17. On the end of the pressure screw opposite the stop head 19 17 a collar nut 22 is screwed onto the thread 18, which presses against a guide piece 23, which is held non-rotatably in the sleeve 9 and with a Pressure piece 24 is provided with a concave outer contour, which is pressed against the concave outer sides of the profiles 15 is.

Beim Ausführungsbeispiel ist das Druckstück 24 Teil eines Halbrundprofiles. Auch die Druckleisten 15 sind von solchen Halbrundprofilen mit Kreisquerschnitt gebildet.In the embodiment, the pressure piece 24 is part of a Semicircular profile. The pressure bars 15 are of such Semicircular profiles formed with a circular cross-section.

Die Hülse 9 ist, um den Innensechskant 21 zur Betätigung der Druckschraube 17 zugängig zu machen, mit einer Bohrung 25 versehen, die nach dem Einbau der Hülse 9 in die Mastabschnitte 3a, 3a' mit Öffnungen 26 in den Mastabschnitten fluchtet, so dass mit einem Werkzeug von außen die Verdrehung der Druckschraube 17 möglich ist. The sleeve 9 is to the hexagon socket 21 for actuating the To make pressure screw 17 accessible, with a bore 25 provided after the installation of the sleeve 9 in the mast sections 3a, 3a 'with openings 26 in the mast sections is aligned so that the twist with a tool from the outside the pressure screw 17 is possible.

Um sicherzustellen, dass nach dem Einbau der Hülse 9 deren Öffnungen 25 mit den Öffnungen 26 in den Mastabschnitten fluchten, ist die Hülse 9 mit einem axial abstehenden Stiftansatz 27 versehen, der nach dem Einbau in halbkreisförmigen Ausnehmungen 28 jeweils am Ende der Mastabschnitte 3a bzw. 3a' eingreift und so sicherstellt, dass die Betätigungsöffnungen 25 für die Druckschrauben auch mit den zugeordneten Öffnungen 26 in den Mastabschnitten fluchten.To ensure that after installing the sleeve 9 whose Openings 25 with the openings 26 in the mast sections are in alignment, the sleeve 9 with an axially projecting pin shoulder 27 provided that after installation in semicircular Recesses 28 at the end of the mast sections 3a and 3a 'engages and thus ensures that the actuating openings 25 for the pressure screws also with the assigned Openings 26 in the mast sections are aligned.

Ehe nun auf die Wirkungsweise der Verbindungshülse 9 eingegangen wird, darf noch anhand von Fig. 5 darauf hingewiesen werden, dass an einem Rand 16 des Schlitzes 14 Abstandshalteklötze 29 befestigt sind, die dazu dienen, die aufgespreizte Hülse 9 unter einer gewissen Vorspannung zu halten, die dazu ausgenützt wird, um die Durchmesserverringerung der Hülse 9 vor der Montage oder bei einer Demontage zu sichern. Die Hülse 9 ist dadurch auch als eine Art Spreizfeder ausgebildet, die unter der Wirkung der Druckschraube 17 auseinandergespreizt und daher im Durchmesser vergrößert werden kann, aber ihren Durchmesser unter der ihr inne wohnenden Eigenelastizität auch wieder verringert, wenn die Druckschraube 17 gelöst wird.Before going into the mode of operation of the connecting sleeve 9 5 may be pointed out with reference to FIG be that at an edge 16 of the slot 14 spacer blocks 29 are attached, which serve to spread the To keep sleeve 9 under a certain bias, this is used to reduce the diameter of the sleeve 9 secure before assembly or disassembly. The sleeve 9 is thereby also designed as a kind of spreading spring, which spread apart under the action of the pressure screw 17 and therefore can be enlarged in diameter, however their diameter below their inherent elasticity also reduced again when the pressure screw 17 is loosened becomes.

Wie die Fig. 6 ohne weiteres deutlich macht, wird durch eine Verdrehung der Druckschraube 17 in einer Richtung die Bundmutter 22 auf einen größeren Abstand der Bundmutter 19 führt. Dadurch wird das Druckstück 24 mit seiner konvexen Außenkontur gegen die Außenkontur der Druckleisten 15 gedrückt, so dass dadurch, wie Fig. 7 zeigt, Kräfte im Sinn der Pfeile 30 auf die Druckstücke 15 und damit auf die Außenwand 9a ausgeübt werden.As FIG. 6 clearly shows, is by a Rotation of the pressure screw 17 in one direction the collar nut 22 leads to a larger distance from the collar nut 19. As a result, the pressure piece 24 with its convex outer contour pressed against the outer contour of the pressure strips 15, so that, as shown in FIG. 7, forces in the sense of arrows 30 exerted on the pressure pieces 15 and thus on the outer wall 9a become.

Die in Fig. 7 angedeuteten Kräfte im Sinn der Pfeile 30 lassen sich in bekannter Weise in Kräfte senkrecht zur nicht gezeigten Außenwand, beispielsweise des Abschnitte 3a, und in eine Kraft in Richtung dieser Außenwand 9a zerlegen. Leave the forces indicated in FIG. 7 in the direction of arrows 30 in a known manner in forces perpendicular to the not shown Outer wall, for example of section 3a, and in disassemble a force in the direction of this outer wall 9a.

Die Fig. 8 zeigt nun die Situation, bei der das Druckstück 24 noch weiter zwischen die beiden Druckleisten 15 hereingedrückt ist. Die Berührungsstelle 32' zwischen Druckstück 24 und Leisten 15 ist dabei auf den Mantellinien der miteinander in Eingriff kommenden Druckstücke im Sinn des Pfeiles 33 verschoben gegenüber ihrer Lage 32 in Fig. 7. Die Krafteinleitung längs des Pfeiles 31 in die Außenwand 9a erfolgt daher, gemessen von der von der Druckschraube 17 ausgeübten Kraftrichtung 34, unter einem größeren Winkel, was dazu führt, dass bei einer Zerlegung der im Sinn des Pfeiles 31 eingeleiteten Kraft, die in Richtung auf die Außenwand des Abschnittes 3a ausgeübte Kraftkomponente kleiner, die in Richtung des Umfanges der Wand 9a dagegen ausgeübte Kraft größer als jene der Stellung nach Fig. 7 werden. Dies führt zu einer Aufspreizung der Hülse am gesamten Umfang. Die Hülse 9 legt sich daher im gespannten Zustand satt an die Innenwände der aneinandergrenzenden Abschnitte 3a, 3a' bzw. 3a, 7a an. Ein spielfreier stabiler Zusammenschluß der Mastabschnitte wird dadurch gewährleistet.8 now shows the situation in which the pressure piece 24 pressed even further between the two pressure bars 15 is. The contact point 32 'between the pressure piece 24 and strips 15 is on the surface lines of each other engaging thrust pieces moved in the direction of arrow 33 compared to their position 32 in Fig. 7. The introduction of force therefore along the arrow 31 into the outer wall 9a, measured from the direction of force exerted by the pressure screw 17 34, at a larger angle, which leads to that with a disassembly of those initiated in the direction of arrow 31 Force towards the outer wall of the section 3a applied force component smaller that in the direction of The circumference of the wall 9a, however, exerted greater force than that the position of FIG. 7. This leads to a spread the sleeve over the entire circumference. The sleeve 9 lies down therefore in the tensioned state tired of the inner walls of the adjacent Sections 3a, 3a 'and 3a, 7a. On backlash-free connection of the mast sections thereby guaranteed.

Wie Fig. 1 zu entnehmen ist, werden die Mastabschnitte 3a, 3a' durch die an den Trägern 2 sitzenden Lasten, beispielsweise Scheinwerfer o.dgl., in der Regel auf Druck beansprucht. Die von der Hülse 9 ausgeübten Reibungskräfte dienen daher dem spielfreien Zusammenbau. Der Reibungsschluß kann zweifellos auch gewisse Kräfte aufnehmen, wenn Zug auf den Mast 3 ausgeübt wird. Dies kann beispielsweise dann der Fall sein, wenn an den Trägern 2 in der voll nach oben ausgefahrenen Stellung ein Dach angeordnet wird und die ganze Tragvorrichtung nicht innerhalb von Räumen, sondern im Freien aufgestellt wird. In diesem Fall können Windkräfte auf das Dach auftreten, die zu einer Zugbelastung der Masten 3 führen. Um hier außer dem Reibungsschluß auch noch einen Formschluß zu erzielen, ist es möglich, die mit den Innensechskanten 21 versehenen Betätigungsansätze der Druckschrauben 17 nach außen so weit zu verlängern, dass ein Eingriff in die Öffnungen 26 der Mastabschnitte 3a bzw. 3a' stattfindet.As can be seen in FIG. 1, the mast sections 3a, 3a 'by the loads sitting on the supports 2, for example Headlights or the like, usually used under pressure. The frictional forces exerted by the sleeve 9 serve hence the backlash-free assembly. The frictional engagement can undoubtedly also absorb certain forces when train on the Mast 3 is exercised. This can be the case, for example be when on the beams 2 in the fully extended Position a roof is arranged and the whole carrying device not set up indoors, but outdoors becomes. In this case, wind forces can hit the roof occur that lead to a tensile load on the masts 3. Around in addition to the frictional engagement here also a positive engagement achieve, it is possible to use the hexagon socket 21 provided actuating approaches of the pressure screws 17 to the outside to extend so far as to interfere with the openings 26 of the mast sections 3a and 3a 'takes place.

Claims (9)

Mast für eine Tragvorrichtung mit Trägern (2), die über einen am Mast (3) geführten Läufer (13) in der Höhe verfahrbar sind und zur Halterung von bühnentechnischen Gerätschaften dienen, wobei der Mast aus mehreren Rohrabschnitten (3a, 3a') gleichen Durchmessers aufgebaut ist, die an den Nahtstellen (8) durch ein Innenrohrstück (9) zueinander ausgerichtet und untereinander verbunden sind,
dadurch gekennzeichnet, dass
das Innenrohrstück aus einer längs einer Mantelline geschlitzten Hülse (9) besteht, die von mindestens einer Druckschraube (17) durchsetzt ist, die über ein Druckstück (24) mit konvexer Außenkontur auf am Rand des Schlitzes (14) vorgesehene Gegendruckstücke (15) mit ebenfalls konvexer Außenkontur einwirkt.Mast for a carrying device with supports (2) which can be moved in height by means of a runner (13) guided on the mast (3) and which are used to hold stage equipment, the mast consisting of several pipe sections (3a, 3a ') of the same diameter is constructed, which are aligned with each other at the seams (8) by an inner tube piece (9) and connected to each other,
characterized in that
the inner tube piece consists of a sleeve (9) slotted along a surface line, which is penetrated by at least one pressure screw (17) which also has a pressure piece (24) with a convex outer contour on counter pressure pieces (15) provided at the edge of the slot (14) acts on the convex outer contour. Mast nach Anspruch 1, dadurch gekennzeichnet, dass die Druckschraube (17) in einer durch den Schlitz (14) verlaufenden Radialebene liegt.Mast according to claim 1, characterized in that the pressure screw (17) lies in a radial plane running through the slot (14). Mast nach Anspruch 1, dadurch gekennzeichnet, dass die Außenkontur von Druckstück (24) und Gegendruckstück (15) von Kreiszylinderflächen gebildet sind.Mast according to claim 1, characterized in that the outer contour of the pressure piece (24) and counter pressure piece (15) are formed by circular cylindrical surfaces. Mast nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Druckschraube (17) mit einer verstellbaren Mutter (22) versehen ist, die an einem unverdrehbar geführten Führungsstück (23) anliegt, welches das Druckstück (24) aufweist.Mast according to one of claims 1 to 3, characterized in that the pressure screw (17) is provided with an adjustable nut (22) which bears against a non-rotatably guided guide piece (23) which has the pressure piece (24). Mast nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass an der dem Druckstück (24) gegenüberliegenden Seite der Druckschraube (17) ein Anschlagkopf (19) vorgesehen ist, der an einem an der Rohrinnenwand anliegenden Rechteckprofil (20) anliegt. Mast according to one of claims 1 to 4, characterized in that a stop head (19) is provided on the side of the pressure screw (17) opposite the pressure piece (24), which rests against a rectangular profile (20) resting on the inner tube wall. Mast nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Hülse (9) mit Öffnungen (25) zum Durchführen eines Drehwerkzeuges für die Druckschraube (17) versehen ist.Mast according to one of claims 1 to 5, characterized in that the sleeve (9) is provided with openings (25) for carrying out a turning tool for the pressure screw (17). Mast nach Anspruch 6, dadurch gekennzeichnet, dass fluchtend zu den Öffnungen (25) an der Hülse (9) Öffnungen (26) in den Mastabschnitten (3a, 3a') vorgesehen sind.Mast according to claim 6, characterized in that openings (26) are provided in the mast sections (3a, 3a ') in alignment with the openings (25) on the sleeve (9). Mast nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Hülse (9) mit mindestens einem, insbesondere von der Mittelquerebene der Hülse abstehenden Anschlagstift (27) versehen ist, der als Axialanschlag in jeweils eine halbkreisförmige Ausnehmung (28) an der Nahtstelle (8) zwischen benachbarten Mastabschnitten (3a, 3a') eingreift.Mast according to one of claims 1 to 6, characterized in that the sleeve (9) is provided with at least one stop pin (27) which projects in particular from the central transverse plane of the sleeve and which acts as an axial stop in each case in a semicircular recess (28) at the seam (8) engages between adjacent mast sections (3a, 3a '). Mast nach Anspruch 7, dadurch gekennzeichnet, dass die Druckschraube (17) mit einem Innensechskant (21) zur Betätigung versehen ist, der an einem stirnseitigen Ansatz angebracht ist und dass dieser Ansatz zur formschlüssigen Axialsicherung der Mastabschnitte (3a, 3a') gegeneinander in die Öffnungen (26) der Mastabschnitte hereinreicht.Mast according to claim 7, characterized in that the pressure screw (17) is provided with an internal hexagon (21) for actuation, which is attached to a front attachment and that this attachment for positive axial securing of the mast sections (3a, 3a ') against each other in the Openings (26) of the mast sections reach in.
EP01105398A 2000-06-02 2001-03-12 Mast for support structure Expired - Lifetime EP1160396B1 (en)

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Application Number Priority Date Filing Date Title
DE20009896U DE20009896U1 (en) 2000-06-02 2000-06-02 Mast for a carrying device
DE20009896U 2000-06-02

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EP1160396A2 true EP1160396A2 (en) 2001-12-05
EP1160396A3 EP1160396A3 (en) 2003-05-28
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AT (1) ATE335897T1 (en)
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Also Published As

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HK1042534A1 (en) 2002-08-16
EP1160396B1 (en) 2006-08-09
EP1160396A3 (en) 2003-05-28
US20020007612A1 (en) 2002-01-24
DE50110659D1 (en) 2006-09-21
US6519910B2 (en) 2003-02-18
DE20009896U1 (en) 2000-09-07
ATE335897T1 (en) 2006-09-15

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