EP2189592A1 - Dispositif de blocage pour échafaudage modulaire ou similaire - Google Patents

Dispositif de blocage pour échafaudage modulaire ou similaire Download PDF

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Publication number
EP2189592A1
EP2189592A1 EP08169693A EP08169693A EP2189592A1 EP 2189592 A1 EP2189592 A1 EP 2189592A1 EP 08169693 A EP08169693 A EP 08169693A EP 08169693 A EP08169693 A EP 08169693A EP 2189592 A1 EP2189592 A1 EP 2189592A1
Authority
EP
European Patent Office
Prior art keywords
catch
safety catch
securing
scaffolding
safety
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
EP08169693A
Other languages
German (de)
English (en)
Other versions
EP2189592B1 (fr
Inventor
Ulf Peter Oskarsson
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.)
Haki AB
Original Assignee
Haki AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Haki AB filed Critical Haki AB
Priority to PL08169693T priority Critical patent/PL2189592T3/pl
Priority to DK08169693.2T priority patent/DK2189592T3/en
Priority to EP08169693.2A priority patent/EP2189592B1/fr
Publication of EP2189592A1 publication Critical patent/EP2189592A1/fr
Application granted granted Critical
Publication of EP2189592B1 publication Critical patent/EP2189592B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
    • E04G1/154—Non-detachably fixed and secured connections between platform and scaffold
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/02—Connections between parts of the scaffold with separate coupling elements
    • E04G7/28—Clips or connections for securing boards

Definitions

  • the present invention relates to a locking device for modular scaffolding, such as building site scaffolding, mason's staging or similar, and especially to such a locking device between ledgers and decks, scaffold boards, ramps, ladders or stairs, for preventing the decks, boards, ramps or stairs of the modular scaffolding to become disconnected from the ledgers.
  • a known method for fitting scaffold decks to ledgers in a modular scaffolding, for example a scaffold is to utilise hooks at each end of the decks that are hitched onto the associated ledger by putting the deck hooks at each end of the deck over the associated ledger.
  • the decks are then secured to the ledger at each end, so that the deck, i.e. the deck hooks being open downwards are prevented from being lifted off the ledger, i.e. locking deck and ledger, by using securing devices with safety catches.
  • a known securing device is disclosed in SE-C2- 521 317 .
  • This securing device comprises a safety catch on a through shaft, a spring and a nut.
  • the safety catch is constituted by a displaceable locking slide which is movable in a curved guiding slit essentially following the circumference of the ledger.
  • the securing slide is slid in the slit between a release position, in which the deck can be assembled and disassembled, respectively, with the deck hooks, and a lock position, in which the slide blocks the deck in the deck hook elements and locks the deck to the scaffolding.
  • the present invention thus relates to an improvement of a securing or locking device between decks, stairs, ladders and ledgers for modular scaffolds or similar, and to loops used for securing around studs or pins.
  • the securing device has inherent springing features and comprises a safety catch between the deck and the ledger.
  • the catch is provided on the deck and will, in its locked position, secure the deck to the ledger.
  • the locking device of the present invention fulfils the object by means of a device for securing detachable parts at a modular scaffolding comprising a safety catch, the catch being adapted to be moved from a first open position to a second securing position when securing at least one detachable part at the scaffolding.
  • the safety catch is movably arranged in an attachment member on the associated detachable part and is shaped in such a way that the safety catch and the attachment member interact achieving an inherent spring action enabling the catch to be moved manually between the first and second positions, while at the same time enabling the catch to be retained in each position.
  • the locking device of the present invention also fulfils the object by means of a device for securing detachable parts at a modular scaffolding comprising a safety catch, the catch being adapted to be moved from a first open position to a second securing position when securing at least one detachable part at the scaffolding.
  • the safety catch is devised to surround at least two opposing sides of a connecting part on the associated scaffolding when securing the detachable part at the scaffolding.
  • the safety catch is shaped in such a way that it will have resilient properties enabling the catch to be retained in the first open position and the second securing position, respectively.
  • the safety catch is shaped in such a way that it will have resilient properties enabling the catch to be retained in each of said positions.
  • the safety catch is arranged to surround at least three sides of the connecting part on the associated scaffolding.
  • the safety catch has an L-shape, an U-shape, or a D-shape.
  • the safety catch is shaped in an elongated bent form, whereby, in one embodiment, the safety catch is shaped of a bent wire in such a way that the central portion of the catch is made by double wire, and, in another embodiment, the safety catch is shaped of a bent wire in such a way that the ends of the catch is made by double wire.
  • the safety catch is rotatably attached at its middle portion or its ends to the detachable part of the scaffolding.
  • the safety catch is arranged through the attachment member.
  • the safety catch has two free ends extending in the essentially same direction.
  • the safety catch is shaped and arranged in the attachment member such that the spring action is achieved by means of a biasing force from the catch being clamped therein.
  • the attachment member has an inner cavity with varying inside dimensions for control of the resilience of the safety catch when moved therein.
  • the inner cavity of the attachment member in one embodiment has a cross-section forming at least two distinct locations corresponding to said positions for the safety catch, and, in another embodiment, the inner cavity of the attachment member has an essentially square shape with inner corners.
  • the inner cavity comprises at least one groove in each of at least two diametrically opposing inner corners increasing the inner dimension between these corners.
  • the safety catch in still another embodiment is shaped such that it is able to clamp the ledger when locked in its second position.
  • the advantages of the present invention are the following: a minimum of parts are required for constructing the securing device facilitating both handling, mounting, dismounting and storing of the different parts, and also the securing device as a whole due to the fact that only two parts form the securing device; the reduced complexity of the securing device also reduces the wear of parts, the risk of corrosion of parts, and parts freezing on to or in each other minimizing the malfunction as a lesser number of parts is used; and reduces costs related thereto.
  • the present invention relates to a self-springing securing device 10, arranged between a deck or a stair 20 and a ledger 30 in e.g. scaffolding, for releasably locking these detachable parts, i.e. at least one deck or stair to the modular scaffolding.
  • the securing device comprises a safety catch 4, 40, 400, 410 (shown in Figs 1-20 ), preferably arranged at the exterior end of the deck or the stair.
  • the catch may be modified to be arranged on the scaffolding or ledger instead (not shown).
  • the deck or stair 20 comprises hook-shaped protrusions for mounting onto the ledger 30 (shown in Figs 1 and 2 ), which deck or stair then is secured by the securing device 10 according to the invention for preventing these hooks from being lifted off accidentally from the ledger.
  • the securing device 10 for securing the deck or stair 20 comprises the safety catch 4, 40, 400, 410 movably mounted in an attachment member 5, 50 on the deck end.
  • Figs 3-5 show the function of the securing device 10.
  • the catch is adapted to be moved from a first open position 10A shown in Figs 1 , 3 , 10 , 11 , and 19 to a second securing position 10B shown in Figs 2 , 5 , 6 , 8 , 12 , and 15 to 18 , and to interact with the attachment member achieving an inherent spring action enabling the catch to be moved manually between the positions 10A, 10B, while at the same time enabling the catch to be retained in each position.
  • the catch is held in each position by itself.
  • the catch moves past an intermediary position 10C shown in Fig 4 when moved counter-clockwise between the positions 10A and 10B.
  • the catch could of course be moved in the clockwise direction (as for another embodiment of the catch 410 moved from the locked position 10B in Fig 18 to the open position 10A in Fig 19 ) if the catch in Fig 3 pointed downwards instead of upwards.
  • the safety catch 4, 40, 400, 410 is an elongated object with a bent shape such that when fitting the catch into the attachment member 5, 50, which functions as a bracket for forming the security device 10 together with the catch as one unit consisting of only two parts.
  • the catch is resiliently and movably clamped inside the bracket 5, 50 when the security device is attached to the deck or stair 20.
  • the safety catch 4, 40, 400, 410 may have a L-shape (surrounding at least two sides of the ledger 30 when locked, see Figs 8 and 9 ), an U-shape (surrounding at least two opposing sides of the ledger, see Fig 6 ), i.e. one embodiment has an U-shape in at least two directions as seen in Figs.
  • a D-shape (surrounding at least one side of the ledger and functioning similar to a stop or anvil when locked or surrounding all sides of a pin or stud (not shown) when folded over the pin end such that the pin end protrudes through the eye-bolt like catch when locked in position 10B shown in Figs 15-18 ).
  • the safety catch 4, 40, 400, 410 is a bent wire.
  • the catch is shaped in such a way that the central portion of the catch is made by double wire or the catch ends 4A, 4B; 40A, 40B; 410A are made by double wire.
  • the catch 4, 40, 400, 410 in one embodiment is rotatably arranged in the bracket 5, 50 such that it may be rotated one whole turn or more, i.e. it may be turned more than 90°, and even more than 360°, even though, in some of the disclosed embodiments, the catch is not turned more than 90° or 180° in the bracket when used.
  • the catch is turned stepwise 90°, one step at a time achieving almost fixed intervals between the positions 10A and 10B.
  • This construction of the security device 10 according to the invention has no rotation limiting structure in itself as it may be rotated more than one whole turn inside the bracket.
  • the only stops for its resilient pivoting in shown embodiments are the deck or stair 20 forming physical stops or anvils.
  • the catch 4, 40, 410 is bent double at least at its middle portion, and in the embodiment shown in Figs 10-14 , the catch 400 is double at its ends 400A, 400B.
  • Each doubled portion of each catch is fitted into one bracket 5, 50 and clamped therein when the security device 10 is attached to the deck or the stair 20, such that this double portion is compressed inside the bracket creating an inherent biasing/spring action or force from the catch inside the bracket.
  • Any known detachable or non-detachable means of attaching the bracket to the deck is possible, e.g. screws and nuts, clamps, welding, or riveting, but detachable means are preferred.
  • the embodiment of the catch 400 in Figs 10-14 may be used as a handle for lifting a deck/stair 20 or as a safety catch for preventing the same deck or stair to be lifted off the ledger 30 accidentally. If this catch 400 is to be used as a safety catch it is attached to the ledger or the scaffolding 30 such that its protruding end 400A is placed over the deck or stair when in its locked position 10B shown in Fig 12 . In this embodiment, two brackets 5 are used for holding the catch 400.
  • Figs. 1 , 3 , 10 , 11 , and 19 show the catch 4, 40, 400, 410 in its open position.
  • the catch When mounting the deck 20 to the ledger 30, the catch will be in this open position 10A. In its open position, the hooks of the deck/stair can be hooked, without resistance, over the ledger. The catch is then switched over by turning it manually to its locking position 10B shown in Figs 2 , 5 , 6 , 8 , 12 , and 15-18 .
  • the protruding end 4B, 40B of the catch 4, 40 in Figs 3-9 will then be placed under the ledger 30, the same goes for the protruding end 410B of the catch 410 in Figs 15-18 , and 20 , preventing the deck or stair from being lifted up; thus making it securely locked. Disassembling is performed in reverse order.
  • the two embodiments of the catch 4, 40 and 410 may be placed on the ledger 30 or the deck/stair 20 as these catches are turned around an axis being essentially perpendicular to the plane of the deck.
  • the two free ends 4A, 4B; 40A, 40B of the safety catch 4, 40 extend essentially radially in relation to the attachment member 50, i.e. perpendicularly to the lifting direction of the deck 30. If any of the two catches 4 and 410 is placed on the ledger 30, their protruding ends 4B and 410B would then be placed over the deck or stair 20 when each catch is in the locked position 10B.
  • the catch 4 may also be turned upside-down in the latter arrangement, i.e.
  • the two free ends 400A, 400B of the safety catch 400 extend essentially along the attachment member 50 for better enabling the catch to be used as a retractable handle being retracted and extracted in the same direction as the lifting direction for the deck..
  • the bracket 5, 50 comprises an inner cavity 51 in the form of a through hole.
  • the inner cavity has a cross-section creating varying inside dimensions for control of the springing of the safety catch 4, 40, 400, 410 when moved therein
  • the inner cavity cross-section is formed with inner corners, grooves or recesses for forming at least two distinct locations opposite each other or at least two pairwise opposing locations. These distinct inner locations are achieved by making the inside dimension of the inner cavity 51 larger at these opposing locations and smaller at the areas between these locations. This means that the catch with its inherent biasing will snap into these diametrically opposing locations while at the same time create a resistance against movement out of these locations ensuring a reliable and sufficiently function but, at the same time, not making the effort for manual turning too great.
  • the inner cavity 51 of the attachment member 5, 50 has an essentially square shape but could of course be shaped with a circular cross-section having inner grooves forming the locations, a hexagonal cross-section forming more than two pairwise opposing locations, i.e. more than four distinct locations, or any other suitable shape.
  • One example of a inner cavity cross-section is square with at least two diametrically opposing inner corners being locally deeper (compared to the other corners between which the inner dimension is smaller diametrically) by means of additional grooves or indentations for increasing the retaining effect/force on the catch, e.g. in the locked position.
  • the increased retaining effect is achieved in that the indentations surround a larger part of the catch envelope when in this position.
  • the inner dimensions of the cavity 51 are varied locally for controlling the springing properties of the catch and for detemining the number of locations, e.g. instead of two positions, three or more positions with varying depth, i.e. larger or smaller inside dimensions diametrically, may be achieved with more or less resistance against movement in and out of these locations 10A, 10B.
  • the bracket 5, 50 is equipped with an longitudinal opening at the side towards the deck or stair 20 for enabling the introduction of the safety catch 4, 40, 400, 410.
  • the bracket 5, 50 could be made as two complementary halves between which the catch is placed, the two halves are put together forming the inner cavity 51 around the catch, and assembled into a two-part bracket resiliently clamping the catch therebetween.
  • one "half" of the "two-part" bracket 5, 50 could be integrated in the deck/stair 20 or the ledger 30 in the form of a open cavity or recess, i.e. this complementing bracket half would then be a fixed part of the deck or ledger.
  • the securing device 10 according to the invention may be used as safety catches for detachable decks and/or stairs in modular scaffolds, retractable handles in other applications, and/or retractable load hooks in other suitable applications, especially the eye-bolt like safety catch 410.
  • the above catch is made of an erosion-resistant material, such as zinc-coated or stainless steel, plastic or some other material suitable for the purpose and the bracket 5, 50 is made of aluminum, zinc-coated or stainless steel, plastic or some other material suitable for the purpose.
  • Another embodiment (not shown) of the catch 4 in Fig 6 has divergent ends 4A and 4B, i.e. instead of essentially parallel ends.
  • the ends extend such that an increasing distance is achieved between them in their direction pointing away from the bracket 50.
  • This varying distance between the ends 4A, 4B is adapted such that a physical contact is enabled between the ends and the ledger 30 in the ledge locking position 10B for the catch, whereby the ledger is clamped and held in a conical space between the catch ends 4A and 4B.
EP08169693.2A 2008-11-21 2008-11-21 Dispositif de blocage pour échafaudage modulaire ou similaire Active EP2189592B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL08169693T PL2189592T3 (pl) 2008-11-21 2008-11-21 Urządzenie blokujace do rusztowania modułowego lub podobnego
DK08169693.2T DK2189592T3 (en) 2008-11-21 2008-11-21 Locking device for modular scaffolding or the like
EP08169693.2A EP2189592B1 (fr) 2008-11-21 2008-11-21 Dispositif de blocage pour échafaudage modulaire ou similaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08169693.2A EP2189592B1 (fr) 2008-11-21 2008-11-21 Dispositif de blocage pour échafaudage modulaire ou similaire

Publications (2)

Publication Number Publication Date
EP2189592A1 true EP2189592A1 (fr) 2010-05-26
EP2189592B1 EP2189592B1 (fr) 2014-12-24

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ID=40467233

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Application Number Title Priority Date Filing Date
EP08169693.2A Active EP2189592B1 (fr) 2008-11-21 2008-11-21 Dispositif de blocage pour échafaudage modulaire ou similaire

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EP (1) EP2189592B1 (fr)
DK (1) DK2189592T3 (fr)
PL (1) PL2189592T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114856162A (zh) * 2022-06-02 2022-08-05 常州第一建筑集团有限公司 一种盘扣式脚手架操作层走道水平杆新型连接件及其连接方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2398306A (en) * 1945-01-30 1946-04-09 John H Hermanson Safety clamp for scaffolds
GB743311A (en) * 1953-11-09 1956-01-11 Up Right Inc Portable scaffold unit
EP0061257A1 (fr) * 1981-03-19 1982-09-29 Eigertower Limited Crochet de blocage pour échafaudages
GB2174747A (en) * 1985-05-08 1986-11-12 Alto Systems Ltd Hook device
FR2719066A1 (fr) * 1994-04-20 1995-10-27 Comabi Dispositif de plateau pivotant pour échafaudage.
DE19504038A1 (de) * 1995-02-08 1996-08-14 Alvaro Peralta Gerüst
GB2310000A (en) * 1996-02-12 1997-08-13 James Gerald Nolan Ladder to scaffold resilient tie
JP2002004572A (ja) * 2000-06-27 2002-01-09 Ojima Seisakusho:Kk 足場板における隙間遮蔽構造
SE521317C2 (sv) 1999-04-09 2003-10-21 Pluseight Technology Ab Låsanordning vid ställningsplattformar
WO2006086989A1 (fr) * 2005-02-16 2006-08-24 Jumbo Stillads A/S Dispositif de surete pour echafaudage
EP1983129A2 (fr) * 2007-04-18 2008-10-22 Wilhelm Layher Verwaltungs-GmbH Support pour un ouvrage porteur en trois dimensions et dispositif de liaison pour un dispositif de garde-fou et procédé de fixation d'un dispositif de garde-fou sur un support

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2398306A (en) * 1945-01-30 1946-04-09 John H Hermanson Safety clamp for scaffolds
GB743311A (en) * 1953-11-09 1956-01-11 Up Right Inc Portable scaffold unit
EP0061257A1 (fr) * 1981-03-19 1982-09-29 Eigertower Limited Crochet de blocage pour échafaudages
GB2174747A (en) * 1985-05-08 1986-11-12 Alto Systems Ltd Hook device
FR2719066A1 (fr) * 1994-04-20 1995-10-27 Comabi Dispositif de plateau pivotant pour échafaudage.
DE19504038A1 (de) * 1995-02-08 1996-08-14 Alvaro Peralta Gerüst
GB2310000A (en) * 1996-02-12 1997-08-13 James Gerald Nolan Ladder to scaffold resilient tie
SE521317C2 (sv) 1999-04-09 2003-10-21 Pluseight Technology Ab Låsanordning vid ställningsplattformar
JP2002004572A (ja) * 2000-06-27 2002-01-09 Ojima Seisakusho:Kk 足場板における隙間遮蔽構造
WO2006086989A1 (fr) * 2005-02-16 2006-08-24 Jumbo Stillads A/S Dispositif de surete pour echafaudage
EP1983129A2 (fr) * 2007-04-18 2008-10-22 Wilhelm Layher Verwaltungs-GmbH Support pour un ouvrage porteur en trois dimensions et dispositif de liaison pour un dispositif de garde-fou et procédé de fixation d'un dispositif de garde-fou sur un support

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114856162A (zh) * 2022-06-02 2022-08-05 常州第一建筑集团有限公司 一种盘扣式脚手架操作层走道水平杆新型连接件及其连接方法

Also Published As

Publication number Publication date
EP2189592B1 (fr) 2014-12-24
PL2189592T3 (pl) 2015-05-29
DK2189592T3 (en) 2015-03-30

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