EP2722468B1 - Einheit zur zeitweiligen Befestigung am Boden von jeder Art von Ausstattung für die Anordnung von Räumen für besondere Events - Google Patents

Einheit zur zeitweiligen Befestigung am Boden von jeder Art von Ausstattung für die Anordnung von Räumen für besondere Events Download PDF

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Publication number
EP2722468B1
EP2722468B1 EP13188940.4A EP13188940A EP2722468B1 EP 2722468 B1 EP2722468 B1 EP 2722468B1 EP 13188940 A EP13188940 A EP 13188940A EP 2722468 B1 EP2722468 B1 EP 2722468B1
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EP
European Patent Office
Prior art keywords
unlocking
locking
assembly
stud
sleeve
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EP13188940.4A
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English (en)
French (fr)
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EP2722468A2 (de
EP2722468A3 (de
Inventor
Marie-Céline Rascle
Jean-Paul Rascle
François Ledin
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Aime Ledin Ets
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Aime Ledin Ets
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Publication of EP2722468A2 publication Critical patent/EP2722468A2/de
Publication of EP2722468A3 publication Critical patent/EP2722468A3/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/22—Sockets or holders for poles or posts
    • E04H12/2253—Mounting poles or posts to the holder
    • E04H12/2269—Mounting poles or posts to the holder in a socket
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/658—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing
    • E01F9/673—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing for holding sign posts or the like
    • E01F9/677—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing for holding sign posts or the like the sign posts being removable without tools, e.g. of stud-and-socket type
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/658—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing
    • E01F9/673—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing for holding sign posts or the like
    • E01F9/685—Subsoil means, e.g. foundations

Definitions

  • the present invention relates to the technical sector of the temporary ground fixing of equipment for the arrangement of spaces, especially urban, for specific events, and relates to an assembly for said fixing.
  • a first solution is to use an anchor pad directly forming part of the specific equipment, for example in the form of a concrete base directly fixed and anchored in the ground. This technique allows only permanent anchoring in the soil.
  • Another solution is to use an anchor anchored in the ground adapted to receive a specific equipment. This solution is not entirely satisfactory in that it does not propose a locking of said equipment.
  • the problem to be solved by the invention is to ensure the attachment to the ground of equipment for the arrangement of spaces, especially urban, for specific events that allows both a temporary and universal fixation, that is to say for any type of equipment, and a locking of said equipment in the ground.
  • Another object of the invention is also to provide a fastening assembly for unlocking the equipment only by a single operator equipped with a particular tool. The unlocking operation is done by leaving the hands free of the operator.
  • the equipment in question is equipped with a universal end piece enabling it to be engaged in the anchor pad and to be locked.
  • the attachment of the equipment is temporary and the fact of using a universal tip makes it possible to adapt to any type of equipment.
  • a locking spring working in compression is arranged between an abutment integral with the upper part of the fixed shaft and an abutment integral with the lower part of the movable shaft, to allow the return and the maintenance of the mobile shaft in its locking position.
  • the locking / unlocking means comprise a ring and an unlocking tool, said ring is integral with the upper end of the mobile drum and comprises arrangements for cooperating with the unlocking tool to allow the passage of the mobile drum in its unlocking position.
  • the locking / unlocking means further comprise at least one orifice formed in the wall of the fixed shaft and receiving a retractable locking ball of diameter substantially greater than the diameter of the orifice so that the ball is adapted to protrude inside said barrel to come, in a locking position, partially housed in an annular groove present on the wall of the connecting piece, without said ball passes entirely through said orifice.
  • the cooperation of the ball and the annular groove of the universal connection piece makes it possible to lock the latter axially inside said fixed barrel.
  • the latter comprises an upper portion of internal diameter substantially equal to the outer diameter of the fixed shaft so as to allow the sliding of said mobile shaft by relative to the fixed shaft, and a lower part of diameter internal upper than the outer diameter of the fixed barrel so as to define a space between said barrels, the two parts being delimited by a slope for abutting against the retractable locking ball and force it to protrude inside the fixed shaft when the mobile drum is in its locking position, and the ball being intended to be housed in the space defined between the two barrels when the mobile drum is in its unlocking position.
  • the assembly according to the invention comprises means for adjusting the axial orientation of the connection piece relative to the anchor pad.
  • said adjustment means are in the form of an orientation washer, fixed to the bottom of said fixed shaft with a defined orientation, and designed to cooperate with a longitudinal notch formed on the lower end of the shaft. connection end.
  • the arrangements of the ring, for cooperating with an unlocking tool are in the form of an annular rib forming a hook.
  • the unlocking tool comprises a portion intended to hook on the annular rib forming a hook of the unlocking ring, a portion adapted to bear on the ground or on a portion of the anchor pad, and an arm portion of lever operable to pivot said tool about the point of contact with the ground or portion of the anchor pad, to lift said unlocking ring and move the movable drum to its unlocked position.
  • the unlocking of the connection piece can only be performed by an operator equipped with such a tool.
  • the unlocking operation requires only the presence of a single operator who can simultaneously unlock the tip and remove it himself.
  • the aforementioned tool is adapted to be manipulated by exerting pressure on said lever arm portion, which causes the unlocking of the tip. The user having the free hands can withdraw alone the considered equipment.
  • the Figures 1 and 2 represent an assembly (1) according to the invention for the temporary fixing on the ground of any type of equipment (not shown) for the arrangement of spaces, especially urban, for specific events, which includes a stud ( 2) ground anchor and a universal connection tip (3).
  • the ground anchor pad (2) is made of a sufficiently strong metallic material coated with an anti-corrosion coating lubricated for life to allow optimal anchoring and to withstand the mechanical stresses generated by the equipment to be installed, and severe weather.
  • the anchoring stud (2) is hollow and generally cylindrical in shape with a bottom wall (2a) and an upper opening (2b) for receiving the connecting end (3).
  • the stud (2) is anchored to be recessed and fixed in the ground (not shown). It further comprises a flange (4) for resting on the ground, said flange (4) being, when the stud (2) is anchored in the ground, the outcrop of the ground surface.
  • This collar (4) allows in particular to limit the depression of the stud (2) in the ground and includes other advantages which will be described below.
  • Anti-rotation fins (5) extend longitudinally downwardly from said flange (4) to limit the rotation of the anchor stud (2) when it is anchored in the ground. The anchoring of the stud (2) is optimal.
  • the tip (3) universal connection is also made of a solid metal material with a lubricated anti-corrosion coating for life and is generally cylindrical.
  • the connecting end (3) is preferably hollow to receive the equipment to anchor temporarily on the ground. Said equipment is either fixed at the end, in particular at the upper end (3a), of the connection piece (3) not all known and appropriate means.
  • This tip (3) comprises at its upper part a breaking zone (6) to excessive forces such as shocks.
  • the rupture zone (6) is in the form of a zone of smaller thickness of the wall of said nozzle (3), in particular an annular groove. Said annular groove is formed on the wall of the nozzle (3), below the receiving zone (3a) of the equipment in question.
  • the connecting end (3) comprises a groove (7) formed on its outer wall at a given height, below the rupture zone (6). This groove (7) allows the locking of said tip (3) in the stud (2) of anchoring as described below.
  • connection end piece (3) further comprises a profile in the form of, for example, a longitudinal indentation (8) formed on its lower end. This notch (8) allows the adjustment of the orientation of the tip (3) in the stud (2) anchoring as described below.
  • the end piece (3) thus secured to the equipment is then adapted to be engaged and locked inside the anchor pad (2) for temporarily anchoring the said equipment to the ground.
  • the tip (3) is engaged inside the stud (2) to the rupture zone (6).
  • the anchoring stud (2) comprises a fixed shaft (9), a mobile shaft (10) and means for locking / unlocking the hub (3). ) relative to the stud (2).
  • the fixed shaft (9) is ideally also made of a solid metal material coated with a lubricated anti-corrosion coating for life.
  • Said fixed shaft (9) is hollow and generally cylindrical in shape and is intended to receive the end piece (3) universal connection.
  • the internal diameter of the fixed shaft (9) is substantially equal to the outer diameter of the connecting end (3) with a slight clearance so as to allow the sliding of the end piece (3) in the fixed shaft (9).
  • the anchoring stud (2) comprises a base plate (2c) and the bottom of the fixed shaft (9) is secured to a fastening bushing (11) which is itself secured to said base plate (2c) by means of a fixing nut (11a).
  • An orientation washer (12) is arranged between the nut (11a) and the sleeve (11) as described below.
  • the mobile shaft (10) is ideally also made of a solid metal material coated with a lubricated anti-corrosion coating for life.
  • Said mobile drum (10) is hollow and generally cylindrical in shape and is mounted with sliding capacity around the fixed shaft (9) between a locking position of the end piece (3) in the stud (2) and an unlocking position .
  • the outer diameter of the mobile drum (10) is substantially equal to the inner diameter of the anchor pad (2) with a slight clearance to allow the sliding of said mobile drum (10) in the stud (2) anchoring.
  • the mobile shaft (10) comprises an upper portion (10a) of internal diameter substantially equal to the outer diameter of the fixed shaft (9) with a slight clearance so as to allow said mobile shaft (10) to slide relative to the stationary shaft (9). ), and a lower portion (10b) of inner diameter greater than the outer diameter of the fixed shaft (9) so as to define a space (10d) between said barrels, the two parts (10a, 10b) being delimited by a slope (10c). ).
  • the elastic member is in the form of a helical spring (13) arranged around the fixed shaft (9) and housed in the space (10d) defined between the two barrels (9, 10).
  • the spring (13) works in compression between two retaining rings (13a, 13b), themselves abutting against, on the one hand, an annular shoulder (14) defined on the outer wall of the fixed shaft (9), and on the other hand, on a support washer (15) arranged in an internal annular groove formed in the inner wall of the lower end of the mobile shaft (10). The work of the spring (13) tends to push and hold the mobile shaft (10) downwards in its locking position.
  • the locking / unlocking means of the universal connection end piece (3) in the ground anchor stud (2) comprise at least one orifice (16), four in the embodiment illustrated in the appended figures, provided in FIG. the thickness of the wall of the fixed shaft (9), above the shoulder (14) forming a stop for the retaining ring (13a) of the spring (13).
  • the four orifices (16) are diametrically opposed and regularly distributed over the periphery of the fixed shaft (9).
  • Each of the orifices (16) receives a ball (17) retractable locking diameter substantially greater than the diameter of the orifice (16) so that the ball (17) is adapted to protrude, in the locking position, to the interior of said barrel without completely traversing said orifice (16).
  • the arrangement of the mobile shaft (10) relative to the fixed shaft (9) is such that the orifices (16) receiving the retractable balls (17) are at the lower part of the mobile shaft (10).
  • it cooperates with the ball (17) so that the slope (10c), connecting the upper part (10a) of the mobile drum (10) to the lower part (10b) , abuts against the retractable balls (17) and pushes them into the orifices (16) of respective kinds that said balls (17) project inside the fixed shaft (9).
  • the mobile shaft (10) and said balls (17) are therefore in the locking position.
  • the retractable balls (17) cooperate with the annular groove (7) and partially penetrate into the annular groove (7) so as to axially locking said connection piece (3) with respect to the fixed shaft (9) and thus with respect to the anchoring stud (2).
  • the locking / unlocking means also comprise a ring (18) and a tool (19) for unlocking.
  • the ring (18) is made of a solid metallic material and coated with a lubricated anti-corrosion coating for life.
  • the flange (4) of the stud (2) ground anchor defines a frustoconical inlet at the upper end of said stud (2) anchoring.
  • the ring (18) is of generally frustoconical shape complementary to the shape of the inlet defined by the collar (4) so that said ring (18) rests on the flange (4) in the locked position, without penetrating into said anchor pad (2).
  • the ring (18) is integral with the upper end of the mobile shaft (10) and comprises an internal diameter equal to the inner diameter of the fixed shaft (9).
  • the ring (18) comprises two seals (18a, 18b), one (18a) arranged on the outer periphery of said ring (18) in order to be in contact with the frustoconical flanges (4a) of the flange (4) to guarantee the seal between said flange (4) and the ring (18), and the other (18b) arranged on the inner periphery of the ring (18) so as to be in contact with the outer wall of the end piece (3) of connection when it is engaged in the stud (2) anchoring to ensure the seal between said tip (3) and the ring (18).
  • the ring (18) makes it possible to move the mobile drum (10) into its unlocked position. It comprises for this purpose, arrangements for cooperating with the tool (19) for unlocking.
  • the arrangements are in the form of an annular rib (18c) forming a hook.
  • the unlocking tool (19) comprises, in turn, a portion (19a) intended to hook on the annular rib (18c) forming a hook of the ring (18) for unlocking, a portion (19b) adapted to take support on the ground or on a part of the anchoring stud (2), in particular on the collar (4), and a portion (19c) forming a lever arm that can be actuated to pivot said tool (19) around the point contact with the ground or the part of the anchoring stud (2), to lift said unlocking ring (18).
  • pressing the portion (19c) forming the lever arm of the unlocking tool (19) can raise the ring (18) and thus lift the movable shaft (10), against the compression force of the spring (13).
  • lifting the mobile drum (10) removes the contact of the slope (10c) with the balls (17) retractable.
  • Said balls (17) are opposite the space (10d) defined between the two drums (9, 10) and are able to withdraw from the annular groove (7) and to be housed in said space (10d), thus releasing the locking of the tip (3) relative to the stud (2).
  • the operator only has to remove the equipment by hand.
  • the edges of the annular groove (7) comprise chamfers (7a) so that the removal of the equipment and thus the connecting end (3) makes it possible to push the retractable balls (17) into the space (10d). ) above.
  • Unlocking is done by a single operator using the specific tool (19).
  • the operator ideally activates the tool (19) with his foot and keeps his hands free to remove the equipment.
  • the movable shaft (10) is forced by the spring (13) to return to its locking position and is maintained in this position, that is to say the ring (18) abutting on the flange (4) and the slope (10c) abutting on the balls (17) retractable.
  • the sleeve (11) deforms and flattens slightly so that the fixed shaft (9) moves slightly downwards, against the compression force of the spring (13), and sufficiently so that the retractable balls (17) are at the space (10c) defined between the two drums (9, 10), and pushed into it by the part beveled (3b) of the tip (3).
  • the tip (3) is then engaged in the fixed shaft (9) until the retractable balls (17) are released and partially penetrate into the annular groove (7) of said tip (3) for the locking of the latter. this.
  • the annular rib (18c) forming a hook of the unlocking ring (18) makes it possible, when the latter does not receive the tool (19), and when no coupling end (3) is engaged in the stud ( 2) anchoring, to receive a protective cap (not shown) for the stud (2) anchoring.
  • the operator then directs the equipment, and therefore the connecting end piece (3) as he wishes, at the same time orienting the orientation washer (12), and then removes the end piece (3) with the aid of the unlocking tool (19).
  • the operator finally tightens the nut (11a) fixing trying to keep the orientation of the orientation washer (12).
  • the orientation of the tip (3) is set and maintained.
  • the assembly (1) makes it possible to make any equipment mounted at the end of the end piece (3) of universal connection removable. This makes it possible to remodel urban spaces according to events, seasons or technical needs.
  • the implementation is simple, fast and secure. The presence of a single operator is necessary to perform the locking / unlocking operations of the equipment in question. Unlocking can only be done with the specific tool (19).

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (9)

  1. Anordnung (1) zur vorübergehenden Befestigung beliebig gearteter Ausrüstungsgegenstände am Boden, um Bereiche auszugestalten, wobei sie Folgendes umfasst:
    - einen hohlen Verankerungsstift (2), der dazu bestimmt ist, in den Boden eingeführt und dort befestigt zu werden;
    - ein universelles Anschlussstück (3), das dafür geeignet ist, ins Innere des Verankerungsstifts (2) eingesteckt zu werden, und dazu bestimmt ist, an einem Abschnitt des Ausrüstungsgegenstands befestigt zu werden, und
    - Mittel zum Verriegeln/Entriegeln des Stücks (3) gegenüber dem Stift (2);
    dadurch gekennzeichnet, dass die Anordnung darüber hinaus Folgendes umfasst:
    - einen festen Schaft (9), der im Inneren des Verankerungsstifts (2) angeordnet ist und dazu bestimmt ist, das universelle Anschlussstück (3) aufzunehmen, und
    - einen beweglichen Schaft (10), welcher derart angebracht ist, dass er rund um den festen Schaft (9) zwischen einer Verriegelungsposition, in welcher der bewegliche Schaft (10) mit den Verriegelungs-/Entriegelungsmitteln zusammenwirkt, um das Stück (3) gegenüber dem Stift (2) zu verriegeln, und einer Entriegelungsposition, in welcher er mit den Verriegelungs-/Entriegelungsmitteln zusammenwirkt, um das Stück (3) gegenüber dem Stift (2) zu entriegeln, verschiebbar ist.
  2. Anordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass eine zusammendrückbare Verriegelungsfeder (13) zwischen einem Anschlag (14), der fest mit dem oberen Abschnitt des festen Schafts (9) verbunden ist, und einem Anschlag (15), der fest mit dem unteren Abschnitt des beweglichen Schafts (10) verbunden ist, angeordnet ist, damit der bewegliche Schaft (10) in seine Verriegelungsposition zurückgeholt und dort gehalten werden kann.
  3. Anordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Verriegelungs-/Entriegelungsmittel einen Ring (18) und ein Entriegelungswerkzeug (19) umfassen, wobei der Ring (18) fest mit dem oberen Ende des beweglichen Schafts (10) verbunden ist und Ausgestaltungen umfasst, um mit dem Entriegelungswerkzeug (19) derart zusammenzuwirken, dass der bewegliche Schaft (10) in seine Entriegelungsposition gelangen kann.
  4. Anordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Verriegelungs-/Entriegelungsmittel darüber hinaus mindestens eine Öffnung (16) umfassen, die in der Wand des festen Schafts (9) ausgespart ist, wobei die Öffnung (16) eine zurückziehbare Verriegelungskugel (17) aufnimmt, deren Durchmesser deutlich größer als der Durchmesser der Öffnung (16) ist, sodass die Kugel (17) im Inneren des festen Schafts (9) derart hervorragen kann, dass sie in der Verriegelungsposition teilweise von einer Rille (7) aufgenommen wird, welche in der Wand des Anschlussstücks (3) ausgebildet ist, um dieses axial im Inneren des festen Schafts (9) zu verriegeln, ohne dass die Kugel (17) vollständig durch die Öffnung (16) gelangt.
  5. Anordnung (1) nach Anspruch 4, dadurch gekennzeichnet, dass der bewegliche Schaft (10) einen oberen Abschnitt (10a) umfasst, dessen Innendurchmesser im Wesentlichen gleich dem Außendurchmesser des festen Schafts (9) ist, sodass der bewegliche Schaft (10) gegenüber dem festen Schaft (9) verschiebbar ist, sowie eine unteren Abschnitt (10b), dessen Innendurchmesser größer als der Außendurchmesser des festen Schafts (9) ist, sodass ein Raum (10d) zwischen den Schäften (9, 10) abgegrenzt wird, wobei die beiden Abschnitte (10a, 10b) von einer abschüssigen Fläche (10c) begrenzt werden, die dazu bestimmt ist, gegen die zurückziehbare Verriegelungskugel (17) zu stoßen, sodass diese zwangsläufig im Inneren des festen Schafts (9) hervorragt, wenn der bewegliche Schaft (10) sich in seiner Verriegelungsposition befindet, und wobei die Kugel (17) dazu bestimmt ist, im Raum (10d) aufgenommen zu werden, der zwischen den beiden Schäften (9, 10) abgegrenzt wird, wenn sich der bewegliche Schaft (10) in seiner Entriegelungsposition befindet.
  6. Anordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass sie Mittel zum Einstellen der axialen Ausrichtung des Anschlussstücks (3) gegenüber dem Verankerungsstift (2) umfasst.
  7. Anordnung (1) nach Anspruch 6, dadurch gekennzeichnet, dass die Einstellmittel in Form einer Ausrichtungsscheibe (12) vorliegen, die am Boden des festen Schafts (9) mit einer bestimmten Ausrichtung befestigt ist, wobei sie dazu bestimmt ist, mit einer längsgerichteten Ausnehmung (8) zusammenzuwirken, die am unteren Ende des Anschlussstücks (3) ausgespart ist.
  8. Anordnung (1) nach Anspruch 3, dadurch gekennzeichnet, dass die Ausgestaltungen des Rings (18) in Form einer ringförmigen Rippe (18c) vorliegen, die einen Haken bildet, welcher dazu befähigt ist, mit dem Entriegelungswerkzeug (19) zusammenzuwirken.
  9. Anordnung (1) nach Anspruch 8, dadurch gekennzeichnet, dass das Werkzeug (19) einen Abschnitt (19a) umfasst, der dazu bestimmt ist, sich an der ringförmigen Rippe (18c) einzuhaken, welche den Haken des Entriegelungsrings (18) bildet, sowie einen Abschnitt (19b), der dazu geeignet ist, auf dem Erdboden oder auf einem Abschnitt des Verankerungsstifts (2) aufzuliegen, und einen Abschnitt (19c), der einen Hebelarm bildet, welcher betätigt werden kann, um das Werkzeug (19) um den Kontaktpunkt mit dem Erdboden oder dem Abschnitt des Verankerungsstifts (2) zu schwenken, sodass der Entriegelungsring (18) angehoben wird und der bewegliche Schaft (10) in seine Entriegelungsposition gelangt.
EP13188940.4A 2012-10-18 2013-10-16 Einheit zur zeitweiligen Befestigung am Boden von jeder Art von Ausstattung für die Anordnung von Räumen für besondere Events Active EP2722468B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1259958A FR2997119B1 (fr) 2012-10-18 2012-10-18 Ensemble pour la fixation temporaire au sol de tout type d'equipement pour l'agencement d'espaces en vue d'evenements specifiques

Publications (3)

Publication Number Publication Date
EP2722468A2 EP2722468A2 (de) 2014-04-23
EP2722468A3 EP2722468A3 (de) 2016-04-20
EP2722468B1 true EP2722468B1 (de) 2017-03-01

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DE102020118800A1 (de) 2020-07-16 2022-01-20 Knirps International Gmbh Mastfußverankerung

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CN110593144A (zh) * 2019-08-05 2019-12-20 祝源 一种单体砼基座安装结构及方法
CN115602044B (zh) * 2022-10-21 2024-07-05 贵州电网有限责任公司 一种二次回路端子防误操作通用标识牌

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FR2997119A1 (fr) 2014-04-25
EP2722468A2 (de) 2014-04-23
EP2722468A3 (de) 2016-04-20

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