EP2909397B1 - Structure de support de tribune et methode de superposer de la structure - Google Patents

Structure de support de tribune et methode de superposer de la structure Download PDF

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Publication number
EP2909397B1
EP2909397B1 EP13779327.9A EP13779327A EP2909397B1 EP 2909397 B1 EP2909397 B1 EP 2909397B1 EP 13779327 A EP13779327 A EP 13779327A EP 2909397 B1 EP2909397 B1 EP 2909397B1
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EP
European Patent Office
Prior art keywords
frame unit
support structure
latching
structure according
frame
Prior art date
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Active
Application number
EP13779327.9A
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German (de)
English (en)
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EP2909397A1 (fr
Inventor
Nigel Matthew PARKER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Steeldeck Industries Ltd
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Steeldeck Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CA2789576A external-priority patent/CA2789576A1/fr
Priority claimed from US13/609,386 external-priority patent/US9234362B2/en
Application filed by Steeldeck Industries Ltd filed Critical Steeldeck Industries Ltd
Publication of EP2909397A1 publication Critical patent/EP2909397A1/fr
Application granted granted Critical
Publication of EP2909397B1 publication Critical patent/EP2909397B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • 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
    • E04H3/12—Tribunes, grandstands or terraces for spectators
    • E04H3/123—Telescopic grandstands

Definitions

  • the present invention relates to a rostrum and a support structure for a rostrum.
  • a rostrum of the invention a plurality of decks are received upon respective frame units which are retractable together so that, when not in use, the rostrum can be stored in a smaller space than would be represented by the rostrum in its position in use.
  • Rostra of this type are described for example in International Patent Application No. WO 2008/149077 and International Patent Application No. WO 2011/042709 .
  • Such rostra typically include a latching mechanism for locking frame units with respect to one another in the extended position.
  • a latching mechanism is described in WO 2011/042709 which comprises a movable blade which is engageable with a latch surface.
  • Each frame unit has a respective movable blade and latch surface and is configured so that, during retraction, the smallest frame unit is first of all unlatched and moved into the next largest frame unit, unlatching it in the process. As a result, the frame units are unlatched and retracted one by one from the smallest to the second largest.
  • a latching mechanism as described in WO 2011/042709 has the disadvantage that, as retraction proceeds, the number of frame units which require guiding increases. This means that the total mass which requires guiding increases, so that, at the end of the retraction process it can be very difficult and requires a lot of effort to ensure that the frame units are stacked smoothly one inside another.
  • the present inventors have set out to overcome this problem.
  • a support structure for a rostrum can be provided in which retraction of the frame units starts with retracting the second largest frame unit into the largest frame unit.
  • the moving mass is the same as in prior art systems, only one frame unit is actually being moved into the retracted position at any one time, so that only it needs to be controlled, thereby simplifying the procedure of retraction.
  • the present invention provides a support structure for a rostrum according to Claim 1.
  • a latching mechanism is provided which prevents the third frame unit from being moved into the second frame unit until the second frame unit has been retracted. Accordingly, the operator has to align only the second frame unit as it is retracted into the first frame unit and can then turn their attention to aligning the third frame unit when the second frame unit has been appropriately aligned.
  • each smaller frame unit being retractable into an immediately larger frame unit, each frame unit being only retractable into the immediately larger frame unit when the immediately larger frame unit has been retracted into the frame unit which is immediately larger than it.
  • frame units there may be five or more, preferably six or more, frame units. There may be up to twelve frame units, more typically up to about ten frame units.
  • the frame units may be of any suitable design, provided that each frame unit which is smaller than the largest frame unit is retractable into an immediately larger frame unit. In this way, the frame units may form a nestable set. By “retracted” it is meant that a smaller frame unit is at least partially enclosed by a larger frame unit, preferably being substantially completely enclosed.
  • the frame units may be as described, for example, in WO 2008/149077 or WO 2011/042709 .
  • each frame unit comprises at least one structural member which extends generally in the retraction direction.
  • the at least one structural member is preferably a foot member.
  • the foot member is preferably configured to move over a floor surface.
  • the foot member comprises at least one roller or sliding surface, for moving over a floor surface.
  • the foot members may extend at an angle to the retraction direction, but it is most preferable from the point of view of efficient stacking that the foot members extend substantially parallel to the retraction direction.
  • the frame units may be made of any suitable material, for example structural steel members. They may be assembled in any suitable manner, for example by welding, bolting or any other suitable method.
  • the latching mechanism may prevent movement of the third frame unit until after the second frame unit has completed a certain proportion of its movement in the retraction direction into the first frame unit.
  • the latching mechanism permits movement of the third frame unit after the second frame unit has completed at least 75%, more preferably at least 90% and most preferably at least 95% of its movement in the retraction direction.
  • the support structure may comprise a latching member operator mounted on the second frame unit which is engageable with a control member mounted on the first frame unit when the second frame unit is retracted into the first frame unit.
  • the latching member operator is configured to move the latching member from the first position to the second position when the latching member operator ceases to engage with a control member of the first frame unit.
  • the second frame unit comprises a blocking member which is biased into contact with a blocking surface formed on the first frame unit and which is displaceable along the blocking surface, the blocking member being movable when it reaches a terminal portion of the blocking surface, the blocking member and the latching member being operably connected so that, when the blocking member moves upon reaching the terminal portion of the blocking surface, the latching member is moved into its second position.
  • the third frame unit comprises a latching surface, which is engageable with the latching member when the latching member is in its first position, in such a manner as to prevent movement of the third frame unit with respect to the second frame unit.
  • the latching member comprises a roller which is configured so that, in a first position, it prevents movement of the third frame unit but, in moving from the first position to the second position, the roller allows a smooth movement of the third frame unit with respect to the second frame unit.
  • the latching surface comprises an end surface of a foot member of the third frame unit.
  • the blocking member or latching member operator is located at a first position on the second frame unit and the latching member is located at a second position on the second frame unit which is displaced from the first position in the retraction direction.
  • the blocking member comprises a roller for moving smoothly with respect to the blocking surface of the first frame unit.
  • the blocking surface comprises a longitudinally extending surface of a foot member of the first frame unit.
  • the terminal portion of the blocking surface corresponds to an end of the foot member in the retraction direction.
  • the latching member is mounted on an arm which is pivotally mounted with respect to the second frame unit.
  • the blocking member comprises an arm which is pivotally mounted with respect to the second frame unit.
  • there is a linking member linking the blocking member and the latching member so that when the blocking member moves upon coming into contact with the terminal portion of the blocking surface, the latching member is moved to its second position.
  • the linking member extends in the retraction direction.
  • Each frame unit may comprise a first position definer for defining its extended position with respect to the immediately larger frame unit.
  • a second position definer for defining the extended position of each frame unit with respect to its immediately smaller frame unit.
  • the first position definer may comprise a projection which is receivable into a second position definer in the form of a notch of the immediately larger/smaller frame unit.
  • a second latching mechanism may be provided for allowing the second frame unit to be retracted into the first frame unit.
  • the second latching mechanism may have a first position for preventing movement of the second frame unit with respect to the first frame unit and a second position for allowing the second frame unit to be retracted into the first frame unit.
  • the second latching mechanism may be movable from its first position to its second position by any suitable mechanism. It may be manually operable. There may be an operating member extending from the second latching mechanism to a position where it is convenient for an operator to operate the operating member.
  • the second latching mechanism may be switchable electronically.
  • the rostrum of the present invention comprises a support structure for a rostrum according to the invention, with a respective deck engaged with each respective frame unit.
  • the present invention further provides a method of stacking a support structure for a rostrum according to Claim 15.
  • Figure 1 shows a support structure for a rostrum 1.
  • the support structure for a rostrum 1 is substantially as shown in International Patent Application No. WO 2008/149077 and will not be described in detail. It comprises two pairs of A-frames, each pair comprising a first frame unit 20, a second frame unit 30 and a third frame unit 40.
  • the second frame unit 30 is retractable in a retraction direction marked by the arrow A from the extended position shown in Figure 1 into the first frame unit 20.
  • the third frame unit 40 is retractable in the retraction direction A from the extended position shown in Figure 1 into the second frame unit 30.
  • the first frame unit 20 comprises a pair of foot members 21 and 22.
  • the second frame unit 30 comprises a pair of foot members 31 and 32.
  • the third frame unit 40 comprises a pair of foot members 41 and 42.
  • the foot members 31 and 32 of the second frame unit are received inside and adjacent to the foot members 21 and 22 of the first frame unit.
  • the foot members 41 and 42 of the third frame unit 40 are received between and within the foot members 31 and 32 of the second frame unit 30.
  • At least the second foot member 32 of the second frame unit 30 is used to mount components of a latching mechanism as shown in Figures 2 and 3 .
  • the second foot member 32 of the second frame unit 30 is described with respect to Figures 2 and 3 , but it will be seen that this latching mechanism can be deployed on other foot members if there are more frame units, as explained with respect to Figure 4 .
  • the second foot member 32 comprises a longitudinally extending member.
  • a plurality of rollers 33, 34, 35 and 36 are provided for rolling along a floor surface.
  • the lower part 37 of the A-frame of the second frame unit 30 and a cross member 38 of the second frame unit 38 can also be seen in part.
  • a blocking member 50 in the form of a roller 51 mounted on an arm 52 is provided at the end of the foot member 32 which is outermost in the retraction direction.
  • the lever 52 is pivotally mounted about a pivot 53 which is formed within the framework of the foot member 32.
  • the opposite end 54 of the lever is connected by a link rod 55 extending in the retraction direction A.
  • auxiliary roller 39 for allowing smooth movement of the foot member 32 along the inside vertical surface 95 of the second foot member 22 of the first A-frame 20.
  • a blocking member 60 is provided at the end which is furthest in the retraction direction A. It comprises a roller 61 mounted on an arm 62 which is pivotally mounted to the foot member 32.
  • the linking rod 55 is pivotally connected to the arm 62 at a position 63 which is on the same side of the fulcrum 64 of the arm 62 at the roller 61.
  • Biasing means bias the arm 62 in an anticlockwise direction as explained below.
  • linking rod 56 which is parallel to the first linking rod 55 and connected in the same manner. It has exactly the same function as the linking rod 55 and is provided for security, in case the first linking rod 55 is damaged.
  • a position definer 70 is provided which, in the extended position engages with a position defining member 80 of the first frame 20 to define the extended position in a reliable manner.
  • a corresponding position defining member 81 is also provided at the end of the foot member 32 which is outermost in the retraction direction for engaging a similar position definer slot 71 of the third frame unit which can be seen in Figure 4 .
  • FIG 4 the second foot member 22 of the first frame unit 20 can be seen, with the second foot member 32 of the second frame unit 30 alongside it and the second foot member 42 of the third frame member 40 alongside the second foot member 32 of the second frame unit 30.
  • a fourth frame unit 90 is shown, having a respective second foot member 92.
  • a part of a fifth frame unit 93 is provided which also has a foot member 94 (partially shown).
  • Each of the foot member 32, foot member 42, foot member 92 and foot member 94 is provided with exactly the same design of latching mechanism as the second foot member of the second frame unit as shown in Figures 2 and 3 .
  • the inside vertical surface 95 of the foot member 22, the inside vertical surface 96 of the foot member 32, the inside vertical surface 97 of the foot member 42 and the inside vertical surface 98 of the foot member 92 each provides a blocking surface. It can be seen that the roller 61' of the foot member 92 is in contact with and is biased into contact with the respective blocking surface 97 of the foot member 42. The blocking surface 97 prevents the arm 62' pivoting in an anticlockwise direction. As a result, the linking member 55' holds the lever arm 52' in a position in which the roller 51' is held in a position in which it blocks movement in the retraction direction A of the foot member 94 which can be seen in Figure 4 .
  • the linking arm 55 has been moved in a direction opposite to the retraction direction A to rotate the arm 52 in an anticlockwise direction so that the roller 51 has moved out of engagement with the end 100 of the second foot member 42 of the third frame unit 40. That is, the latching member was placed in its second position which allowed the third frame unit 40 to be retracted with respect to the second frame unit 30.
  • the foot member 94 is shown in its fully extended position with respect to the foot member 92.
  • the position definer notch 101 of the foot member 94 has engaged the position defining member 102 of the foot member 92 so that they are held in the extended position with respect to one another.
  • Figure 5 summarises in schematic form the method of the present invention. Foot members of the first frame unit 20, second frame unit 30 and third frame unit 40 are shown in the extended position in Figure 5a .
  • Figure 5b according to the present invention, the second frame unit 30 has been retracted with respect to the first frame unit 20. Retraction of the third frame unit 40 is not possible until the second frame unit 30 has been retracted into the first frame unit 20. Only when this retraction has been completed can the support structure be moved into the fully retracted position shown in Figure 5c .
  • Movement of the second frame unit 30 in all of the figures above with respect to the first frame unit 20 is prevented by a latching mechanism which is not shown in the drawings but which can comprise any suitable latching mechanism.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Pallets (AREA)
  • Handcart (AREA)

Claims (15)

  1. Structure de support pour une tribune (1), comprenant :
    une pluralité d'unités de cadre (20, 30, 40) comprenant au moins une première unité de cadre (20), une deuxième unité de cadre (30) qui est rétractable dans une direction de retrait depuis une position étendue dans la première unité de cadre (20) et une troisième unité de cadre (40), qui est rétractable dans la direction de retrait depuis une position étendue dans la deuxième unité de cadre (30) ; et
    dans laquelle un mécanisme de verrouillage comprend un élément de verrouillage présentant une première position afin d'empêcher la troisième unité de cadre (40) de se déplacer relativement à la deuxième unité de cadre (30) et une seconde position dans laquelle la troisième unité de cadre (40) est autorisée à se déplacer relativement à deuxième unité de cadre (30), dans laquelle le mécanisme de verrouillage est configuré de sorte que le mouvement de la deuxième unité de cadre (30) dans la première unité de cadre (20) provoque le déplacement de l'élément de verrouillage de sa première position à sa seconde position, caractérisée en ce que le mécanisme de verrouillage empêche le retrait de la troisième unité de cadre (40) de la position étendue dans la deuxième unité de cadre (30) jusqu'à ce que la deuxième unité de cadre (30) ait été rétractée de la position étendue dans la première unité de cadre (20).
  2. Structure de support selon la revendication 1, dans laquelle il existe quatre unités de cadre ou plus (20, 30, 40), incluant une unité de cadre la plus grande (20) et une pluralité d'unités de cadre plus petites (30, 40), chaque unité de cadre plus petite (30, 40) étant rétractable dans une unité de cadre immédiatement plus grande (20, 30), chaque unité de cadre (30, 40) étant seulement rétractable dans l'unité de cadre immédiatement plus grande (20, 30), lorsque l'unité de cadre immédiatement plus grande (30) a été rétractée en son unité de cadre immédiatement plus grande (20).
  3. Structure de support selon la revendication 1 ou 2, dans laquelle chaque unité de cadre (20, 30, 40) comprend au moins un élément structurel qui s'étend dans la direction de retrait, et
    dans laquelle, de préférence, le au moins un élément structurel est un élément de pied (21, 22, 31, 32, 41, 42).
  4. Structure de support selon l'une quelconque des revendications 1 à 3, dans laquelle la structure de support comprend un opérateur d'élément de verrouillage monté sur la deuxième unité de cadre (30) qui peut être mis en prise avec un élément de commande monté sur la première unité de cadre (20), lorsque la deuxième unité de cadre (30) est rétractée dans la première unité de cadre (20).
  5. Structure de support selon l'une quelconque des revendications 1 à 4, dans laquelle la structure de support comprend un opérateur d'élément de verrouillage qui est configuré afin de déplacer l'élément de verrouillage de la première position à la seconde position, lorsque l'opérateur d'élément de verrouillage cesse de se mettre en prise avec un élément de commande de la première unité de cadre (20).
  6. Structure de support selon l'une quelconque des revendications précédentes, dans laquelle la deuxième unité de cadre (30) comprend un élément de blocage (60) qui est polarisé en contact avec une surface de blocage (95) formé sur la première unité de cadre (20) et qui peut être déplacé le long de la surface de blocage (95), l'élément de blocage (60) étant mobile lorsqu'il entre en contact avec une partie d'extrémité de la surface de blocage (95), l'élément de blocage (60) et l'élément de verrouillage étant raccordés de manière opérationnelle de sorte que, lorsque l'élément de blocage (60) se déplace en entrant en contact avec la partie d'extrémité de la surface de blocage (95), l'élément de verrouillage est déplacé dans sa seconde position.
  7. Structure de support selon l'une quelconque des revendications précédentes, dans laquelle la troisième unité de cadre (40) comprend une surface de verrouillage, qui peut être mise en prise avec l'élément de verrouillage, lorsque l'élément de verrouillage est dans sa première position, de façon à empêcher un mouvement de la troisième unité de cadre (40) relativement à la deuxième unité de cadre (30).
  8. Structure de support selon la revendication 7, dans laquelle la surface de verrouillage comprend une surface d'extrémité d'une partie de pied de la troisième unité de cadre (40).
  9. Structure de support selon la revendication 4 ou 5, ou l'une quelconque des revendications précédentes en dépendant, dans laquelle l'opérateur d'élément de verrouillage est situé dans une première position sur la deuxième unité de cadre (30) et l'élément de verrouillage est situé dans une seconde position sur la deuxième unité de cadre (30) qui est déplacée de la première position dans la direction de retrait.
  10. Structure de support selon la revendication 6, ou l'une quelconque des revendications précédentes en dépendant, dans laquelle la surface de blocage (95) comprend une surface s'étendant de manière longitudinale d'un pied de la première unité de cadre (20) et la partie d'extrémité de la surface de blocage (95) correspond à une extrémité du pied.
  11. Structure de support selon la revendication 6, ou l'une quelconque des revendications précédentes en dépendant, dans laquelle il existe un élément de liaison (55) qui relie l'élément de blocage (60) et l'élément de verrouillage de sorte que, lorsque l'élément de blocage (60) se déplace jusqu'à entrer en contact avec la partie d'extrémité de la surface de blocage (95), l'élément de verrouillage est déplacé vers sa seconde position.
  12. Structure de support selon l'une quelconque des revendications précédentes, comprenant en outre un second mécanisme de verrouillage ménagé de façon à permettre que la deuxième unité de cadre (30) soit rétractée dans la première unité de cadre (20).
  13. Structure de support selon la revendication 11, ou l'une quelconque des revendications précédentes en dépendant, dans laquelle l'élément de liaison (55) s'étend dans la direction de retrait.
  14. Tribune, comprenant une structure de support selon l'une quelconque des revendications précédentes.
  15. Procédé d'empilement d'une structure de support pour une tribune (1), la structure de support comprenant une première unité de cadre (20), une deuxième unité de cadre (30) qui est rétractable dans une direction de retrait depuis une position étendue dans la première unité de cadre (20) et une troisième unité de cadre (40), qui est rétractable dans la direction de retrait depuis une position étendue dans la deuxième unité de cadre (30), comprenant le retrait de la deuxième unité de cadre (30) dans la première unité de cadre (20) et ensuite le retrait de la troisième unité de cadre (40) dans la deuxième unité de cadre (30),
    dans laquelle un mécanisme de verrouillage comprend un élément de verrouillage présentant une première position afin d'empêcher la troisième unité de cadre (40) de se déplacer relativement à la deuxième unité de cadre (30) et une seconde position dans laquelle la troisième unité de cadre (40) est autorisée à se déplacer relativement à deuxième unité de cadre (30), dans laquelle le mécanisme de verrouillage est configuré de sorte que le mouvement de la deuxième unité de cadre (30) dans la première unité de cadre (20), provoque le déplacement de l'élément de verrouillage de sa première position à sa seconde position, caractérisée en ce que le mécanisme de verrouillage empêche le retrait de la troisième unité de cadre (40) de la position étendue dans la deuxième unité de cadre (30) jusqu'à ce que la deuxième unité de cadre (30) a été rétractée de la position étendue dans la première unité de cadre (20), le procédé comprenant en outre une étape consistant à faire fonctionner le mécanisme de verrouillage afin de permettre le mouvement de la troisième unité de cadre (40) dans la deuxième unité de cadre (30), lorsque la deuxième unité de cadre (30) a été rétractée dans la première unité de cadre (20).
EP13779327.9A 2012-09-11 2013-09-11 Structure de support de tribune et methode de superposer de la structure Active EP2909397B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA2789576A CA2789576A1 (fr) 2012-09-11 2012-09-11 Estrade et structure de soutien d'estrade
US13/609,386 US9234362B2 (en) 2012-09-11 2012-09-11 Rostrum and rostrum support structure
PCT/GB2013/052377 WO2014041348A1 (fr) 2012-09-11 2013-09-11 Tribune et structure de support de tribune

Publications (2)

Publication Number Publication Date
EP2909397A1 EP2909397A1 (fr) 2015-08-26
EP2909397B1 true EP2909397B1 (fr) 2020-05-06

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EP13779327.9A Active EP2909397B1 (fr) 2012-09-11 2013-09-11 Structure de support de tribune et methode de superposer de la structure

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EP (1) EP2909397B1 (fr)
ES (1) ES2810909T3 (fr)
WO (1) WO2014041348A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0969166A1 (fr) * 1998-01-14 2000-01-05 KabushikiKaisha Kotobuki Structure de redressement/pliage de siege de tribune amovible pour spectateurs

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744681B1 (fr) * 1996-02-09 1998-04-30 Guillet Sa Systeme de gradins repliable et mobile
WO2008149077A2 (fr) 2007-06-08 2008-12-11 Steeldeck Industries Limited Estrade et structure de support
GB2474295A (en) 2009-10-09 2011-04-13 Steeldeck Ind Ltd Rostrum Support Structure
US8413384B2 (en) * 2010-11-18 2013-04-09 Amtab Manufacturing Corporation Mobile folding choral riser with high-speed cylinder lift-assist mechanism and partially independent back railing linkage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0969166A1 (fr) * 1998-01-14 2000-01-05 KabushikiKaisha Kotobuki Structure de redressement/pliage de siege de tribune amovible pour spectateurs

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WO2014041348A1 (fr) 2014-03-20
EP2909397A1 (fr) 2015-08-26
ES2810909T3 (es) 2021-03-09

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