EP0489599B1 - Système d'échafaudage - Google Patents

Système d'échafaudage Download PDF

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Publication number
EP0489599B1
EP0489599B1 EP19910311365 EP91311365A EP0489599B1 EP 0489599 B1 EP0489599 B1 EP 0489599B1 EP 19910311365 EP19910311365 EP 19910311365 EP 91311365 A EP91311365 A EP 91311365A EP 0489599 B1 EP0489599 B1 EP 0489599B1
Authority
EP
European Patent Office
Prior art keywords
socket
members
pin
attachment means
scaffolding system
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.)
Expired - Lifetime
Application number
EP19910311365
Other languages
German (de)
English (en)
Other versions
EP0489599A1 (fr
Inventor
John Holland
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.)
LEADA ACROW LIMITED (REG. N 2766044)
Original Assignee
LEADA ACROW Ltd (Reg n 2766044)
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 LEADA ACROW Ltd (Reg n 2766044) filed Critical LEADA ACROW Ltd (Reg n 2766044)
Priority to EP96102144A priority Critical patent/EP0718452A3/fr
Publication of EP0489599A1 publication Critical patent/EP0489599A1/fr
Application granted granted Critical
Publication of EP0489599B1 publication Critical patent/EP0489599B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/30—Scaffolding bars or members with non-detachably fixed coupling elements
    • E04G7/302—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members
    • E04G7/306—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are fixed at several bars or members to connect
    • E04G7/308—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are fixed at several bars or members to connect without tying means for connecting the bars or members
    • 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
    • E04G5/00—Component parts or accessories for scaffolds
    • E04G5/14—Railings
    • 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
    • E04G5/00—Component parts or accessories for scaffolds
    • E04G5/16—Struts or stiffening rods, e.g. diagonal rods

Definitions

  • This invention relates to scaffolding systems.
  • Scaffolding systems generally consist of interconnected horizontal and vertical members.
  • the horizontal and vertical members may both be in the same form, e.g. tubular members or the horizontal members can take the form of a space frame comprising two horizontal chord members interconnected and spaced by bracing members.
  • Scaffolding systems have a multiplicity of uses, a particularly common one of which is to support beams, the beams being used, for example, as a work platform or to support concrete cast thereabove. Scaffolding systems employed for this purpose have to have good structural integrity and a problem which arises with those systems where space frames are employed is how to connect these to the vertical leg members to ensure this.
  • the space frames are connected between adjacent vertical members by inserting pins attached to the ends of the chord members of the space frames in sockets provided on the vertical members.
  • a latch member in the form of a plate pivotally mounted on the space frame is then rotated into a position in which it is held between the bottom edge of the socket and the space frame and so serves to prevent the space frame from upward movement relative the socket which would release the pin therefrom.
  • the latching means plate is carried on a face of the space frame and is, therefore, vulnerable to damage both when the system is being transported in its dismantled state and when it is erected and in use.
  • the latching plates do not prevent all movement of the pins in the sockets and so do not provide a rigid connection. They are furthermore vulnerable to incorrect positioning on erection and/or dislodgement in use, in which case they will cease to be effective in any way.
  • a further disadvantage of all the above-described arrangements is that they do not readily permit the attachment of bracing members across the bays formed by the vertical leg members and the horizontal space frames. Specifically, they do not allow the bracing members to be connected at the points of attachment of the space frames and the vertical leg members. The addition of bracing members at locations off-set from these attachment points can cause the introduction of secondary stresses into the system.
  • European Patent Application EP-A-0427448 (relevant under Article 53(3)-EPC) describes a scaffolding system comprising a diagonal brace with a transverse pin for engaging an aperture in an end fitting of a horizontal cross-member.
  • the pin has an internal snap-action latch which a hooked projection end to engage a complementary configuration on the eye.
  • Danish Patent DK-A-117987 describes a scaffolding system with horizontal space frames including a pair of spaced horizontal chords. At each end of both chords a vertical pin is provided, which pins are received in sockets carried on vertical uprights of the system. Each pin carries therein a rivet shaped part biassed by a spring to protrude from the pin when positioned within a socket and thereby retain the pin therein.
  • a scaffolding system has a plurality of legs which are vertical in use, each provided with identical socket members along the length thereof, and a plurality of space frames, each of which comprises two horizontal chord members interconnected and spaced by bracing members and first attachment means at either end of at least one of the chord members whereby the space frame may be connected between two adjacent vertical legs, the first attachment means comprising a pin for insertion into the socket of a socket member, releasable latch means carried on or in the pin and biassing means which, when the pin is inserted into the socket of a socket member, automatically urges the latch means towards a locked position in which a portion thereof latches against the socket member to retain the pin therein and movement of the pin within the socket is prevented, characterised in that the sockets of the socket members have horizontal axes and in that the axes of the pins of the first attachment means of each space frame are transverse to the plane of the space frame whereby when the frame is connected between two adjacent vertical legs, the pins axes
  • the first attachment means are automatically operated so that erection of the system is simpler and quicker. Secondly, they do not require any bolts nor indeed any separate parts which could easily be lost. Thirdly, a rigid and secure connection is provided in which movement of the pin within the socket is prevented and so too, therefore, is movement of the space frame relative the vertical leg to which it is connected. Furthermore, as the latch means is carried on or in the pin, it can be located so that, in use, it is positioned between the vertical member and the space frame and is, therefore, protected.
  • the latch means is carried in the pin with the portion thereof which latches against the socket protruding from the pin.
  • the biassing means comprises a spring carried in the pin.
  • the pin is preferably dimensioned such that it will form a close fit with the socket member to thereby provide a rigid and strong connection of the space frame and vertical member.
  • the other chord member of each space frame may also be provided at each end thereof with first attachment means.
  • the other chord member of each space frame is provided at either end thereof with second attachment means comprising a C-shaped end fitting which locates around and cooperates with a portion of a socket member.
  • a further advantage is that, as will be further described below, the C-shaped end fitting when located around and cooperating with a particular socket member does not interfere with or prevent the securement of a first attachment means to that socket member. Diagonal bracing members provided at an end thereof with a first attachment means can, therefore, be secured to the socket member. In this way the introduction of secondary stresses into the system is avoided.
  • the socket members are suitably arranged in spaced groups, each group comprising two sets of four socket members equi-angularly spaced around a vertical leg, the sets being spaced apart by a distance approximately equal to that between the chord members of a space frame.
  • each socket member comprises a pair of spaced plates, each connected at one end to a vertical leg and formed with an aperture therein dimensioned such that a pin of the first attachment means may be passed therethrough, the apertures being aligned.
  • a ring is secured between the plates with its axis aligned with the apertures therein.
  • the outer radius of the ring is approximately equal to the radius of the inner face of a C-shaped end fitting of the second attachment means.
  • the distance between the ring and the vertical leg to which the socket member is secured is equal to the width of an arm of the C-shaped end fitting.
  • the scaffolding system comprises a plurality of vertical legs 2 interconnected by space frames 4.
  • the space frames 4 comprise two horizontal chord members 6 interconnected and spaced by bracing members 8 which may be vertical, as shown, and/or diagonal.
  • the legs 2 are provided with a plurality of groups of sockets 10 along their length, each group consisting of two sets of four equi-angularly spaced sockets 10.
  • the spacing between each set of sockets 10 is approximately equal to that between the two chord members 6 of the space frames 4.
  • the number of groups of sockets 10 provided will obviously depend on the length of the leg 2. As illustrated in Figure 4, only one group of sockets 10 may be provided.
  • Each socket 10 consists of a pair of plates 12 welded, see 14, to the leg 2. Aligned apertures 15 are provided in the plates 12 and a ring 16 whose inner diameter is equal to that of the apertures is welded, see 18, between the plates 12 with its axis aligned with those of the apertures 15.
  • the set of sockets 10 which are uppermost has the apertures 15 in the upper halves of the plates 12, whilst the set which is lowermost has the apertures 15 in the lower halves of the plates 12.
  • Figure 1 shows the top chord 6a of a space frame 4. This is provided at either end with first attachment means 20 shown in detail in Figure 5.
  • the first attachment means 20 comprises a body having a generally annular boss 22 by which it is welded, see 24, to the end of the chord member 6a.
  • An integral bracket portion 26 of the boss 22 mounts a hollow pin 28 which extends transversely to the plane of the space frame 4.
  • a hook-like latch member 30 is mounted in the interior of the pin 28.
  • the latch member 30 has a hooked projecting nib 32 which protrudes through a slot provided in the wall of the pin 28.
  • the other end of the latch member 30 is pivotally mounted on, for example, a Bissel pin 34 connected between opposite walls of the pin 28.
  • a torsion spring 36 is mounted between an internal surface of the pin 28 and the latch member 30 and around the pivot pin 34. The torsion spring 36 urges the latch member 30 to the position illustrated in Figure 5 in which the nib 32 projects from the pin 28.
  • the latch member 20 Adjacent the pivot pin 34, the latch member 20 has an integral operating arm 38 which projects laterally from the pin 28 through a slot in the wall of the latter as shown in Figure 1.
  • the operating arm projects towards the chord member 6a of the bracing frame 4 and is disposed between a pair of protective ribs or flanges 40 on the latching member 20.
  • the nib 32 When the pin 28 of the latching member 20 is inserted through apertures 15 and ring 16 of a socket member 10, the nib 32 is pushed into the pin 28 against the bias of spring 36, the nib 32 being provided with a tapered leading surface to facilitate this movement.
  • the spring 36 When the pin 28 has been fully inserted, the spring 36 will cause the nib 32 to revert to the position in which it projects through the slot in the pin 28 so causing it to engage the plate 12 on the opposite side of the socket member 10 to that from which the pin 28 was inserted.
  • the pin 28 will, therefore, be positively retained within the socket member 10.
  • the pin 28 is a close fit within the ring 16, whilst the distance between the bracket 26 and the tip of the nib 32 is equal to that between the two plates 12 of the socket member 10. Thus a rigid connection will be provided at which there will be little movement of the parts.
  • the arm 38 is pressed towards the chord 6a to cause the nib 32 to be withdrawn into the pin 28 against the bias of the spring 36. Pin 28 can then be withdrawn from the ring 16.
  • FIG 3 shows the lower chord 6b of a space frame 4. This is provided with second attachment means 42 at either end thereof.
  • the attachment means 42 comprises an annular boss 44 by which it is welded, see 46, to the end of the chord member 6b.
  • Integrally formed with the annular boss 44 is a C-shaped end fitting 48 with an inner circular face of the same radius as the exterior of ring 16.
  • the width of the outer arm 50 of the C-shaped end fitting 48 is equal to the distance between the ring 16 of the socket member 10 and the face of the leg 2 to which the socket member 10 is attached.
  • the thickness of the C-shaped end fitting is equal to the distance between the plates 12 of the socket member 10.
  • the form of the socket members 10 and of the second attachments means 42 allows a bracing member 52 to be additionally attached between the point of connection of a leg 2 and the lower chord 6b of a space frame 4 and a head or base jack carried on an adjacent leg.
  • the diagonal bracing member 52 is provided at one end thereof with a first attachment means 20.
  • the pin thereof can be inserted through the ring 16 without interference from the end fitting 48 of the second attachment means 42 provided at the ends of the lower chord 6b of the space frame 4.
  • the space frame 4 can be easily and securely attached between two vertical legs 2 by pinning its upper chord 6a to two aligned socket members 10 with the first attachment means 20, and latching its lower chord 6b between two further aligned socket members 10 by locating the end fittings 48 of the second attachment means provided at either end thereof around the rings 16 of the socket members 10.
  • first attachment means could be provided at either end of the lower chord 6b with second attachment means being provided at either end of the upper chord 6a.
  • Diagonal bracing members 52 can be attached at those socket members where a space frame chord is connected by second attachment means.
  • the diagonal bracing members could instead be provided with a suitable form of the second attachment means so that these could be attached at socket members where a space frame chord is secured by first attachment means.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Ladders (AREA)

Claims (10)

  1. Système d'échafaudage ayant plusieurs montants (2) qui sont verticaux en utilisation, chacun étant muni d'éléments d'emboîtement (10) le long de sa longueur, et de plusieurs entretoises (4) dont chacune comprend deux membrures horizontales (6) reliées et espacées par des éléments d'étrésillonnement (8) et un premier moyen de fixation (20) à chaque extrémité d'au moins une des membrures, de telle sorte que l'entretoise (4) puisse être interposée entre deux montants verticaux contigus (2), le premier moyen de fixation (20) comprenant une goupille (28) que l'on introduit dans le logement d'un élément d'emboîtement (10), des moyens de verrouillage débloquables (30, 32) portés sur ou dans la goupille (28) et un moyen de charge préliminaire (36) qui, lorsque la goupille (28) est introduite dans le logement d'un élément d'emboîtement (10), pousse automatiquement le moyen de verrouillage (30, 32) vers une position verrouillée dans laquelle une partie (32) dudit moyen se verrouille contre l'élément d'emboîtement (10) pour retenir la goupille (28) à l'intérieur et le mouvement de la goupille (28) dans le logement est empêché, caractérisé en ce que les logements des éléments d'emboîtement (10) ont des axes horizontaux et en ce que les axes des goupilles (28) du premier moyen de fixation (20) de chaque entretoise (4) sont transversaux par rapport au plan de l'entretoise (4), si bien que lorsque l'entretoise (4) est interposée entre deux montants verticaux contigus (2), les axes des goupilles sont horizontaux.
  2. Système d'échafaudage selon la Revendication 1 dans lequel des premiers moyens de fixation (20) sont aussi prévus à chaque extrémité de l'autre membrure (6) de chaque entretoise 4).
  3. Système d'échafaudage selon la Revendication 1, dans lequel l'autre membrure (6) de chaque entretoise (4) est munie à chacune de ses extrémités d'un deuxième moyen de fixation (42) comprenant un embout en forme de C (48) qui se positionne autour d'une partie de l'élément d'emboîtement (10) et coopère avec lui.
  4. Système d'échafaudage selon l'une quelconque des Revendications précédentes, dans lequel les éléments d'emboîtement (10) de chaque montant vertical (2) sont disposés en groupes espacés, chaque groupe comprenant deux jeux de quatre éléments d'emboîtement (10) espacés à intervalles angulaires égaux autour-du montant (2), les jeux étant espacés d'une distance approximativement égale à celle qui existe entre les membrures (6) d'une entretoise (4).
  5. Système d'échafaudage selon l'une quelconque des Revendications précédentes dans lequel chaque élément d'emboîtement (10) comprend une paire de plaques espacées (12), chacune étant reliée à une extrémité à un montant vertical (2) et comportant une ouverture (15) dimensionnée de telle sorte qu'une goupille (28) du premier moyen de fixation (20) puisse passer au travers, les ouvertures (15) étant alignées.
  6. Système d'échafaudage selon la Revendication 5 sous la forme dépendant de la Revendication 3 ou de la Revendication 4, dans lequel la distance entre les plaques (12) est au moins égale à l'épaisseur des bras (50) des embouts en forme de C (48).
  7. Système d'échafaudage selon la Revendication 5 ou la Revendication 6, dans lequel chaque élément d'emboîtement (10) comprend en outre un anneau (16) fixé entre les plaques (12) avec son axe aligné avec celui des ouvertures (15) prévues dans lesdites plaques.
  8. Système d'échafaudage selon la Revendication 6 ou la Revendication 7 sous la forme dépendante soit de la Revendication 3 soit de la Revendication 4, dans lequel chaque embout d'extrémité en forme de C (48) a une face intérieure partiellement circulaire dont le rayon est égal au rayon extérieur de chaque anneau (16).
  9. Système d'échafaudage selon la Revendication 6 ou 8 ou la Revendication 7 lorsqu'elle dépend de la Revendication 3 ou de la Revendication 4, dans lequel l'anneau (16) de chaque élément d'emboîtement (10) est porté par les plaques (12) à une distance du montant vertical (2) auquel elles sont fixées égale à la largeur d'un bras (50) de chaque embout d'extrémité en forme de C (48).
  10. Système d'échafaudage selon l'une quelconque des revendications 3 à 9 comprenant des éléments d'étrésillonnement (52) prévus à une de leurs extrémité avec le premier moyen de fixation (20).
EP19910311365 1990-12-06 1991-12-06 Système d'échafaudage Expired - Lifetime EP0489599B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96102144A EP0718452A3 (fr) 1990-12-06 1991-12-06 Perfectionnements aux systèmes d'échafaudages

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9026567A GB2251451A (en) 1990-12-06 1990-12-06 Scaffold fastening;wedge and pin with apertured stem
GB9026567 1990-12-06

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP96102144.1 Division-Into 1991-12-06

Publications (2)

Publication Number Publication Date
EP0489599A1 EP0489599A1 (fr) 1992-06-10
EP0489599B1 true EP0489599B1 (fr) 1996-08-28

Family

ID=10686600

Family Applications (2)

Application Number Title Priority Date Filing Date
EP96102144A Withdrawn EP0718452A3 (fr) 1990-12-06 1991-12-06 Perfectionnements aux systèmes d'échafaudages
EP19910311365 Expired - Lifetime EP0489599B1 (fr) 1990-12-06 1991-12-06 Système d'échafaudage

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP96102144A Withdrawn EP0718452A3 (fr) 1990-12-06 1991-12-06 Perfectionnements aux systèmes d'échafaudages

Country Status (5)

Country Link
EP (2) EP0718452A3 (fr)
DE (1) DE69121679T2 (fr)
ES (1) ES2093081T3 (fr)
GB (1) GB2251451A (fr)
IE (1) IE76453B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2843119B1 (fr) 2002-07-30 2006-10-06 Rhodia Chimie Sa Composition d'huiles silicone reticulables en elastomeres pour le traitement par impregnation de materiaux fibreux
CN103388397A (zh) * 2013-08-02 2013-11-13 南通亨特管业有限公司 活动脚手架用双横杆

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1348548A (fr) * 1964-04-10
GB647356A (en) * 1947-11-14 1950-12-13 John Burton Improvements in or relating to tubular metal scaffolding
GB1273995A (en) * 1969-09-13 1972-05-10 Kwikform Ltd Improvements in or relating to builders' scaffolding
GB1509899A (en) * 1974-07-19 1978-05-04 Kwikform Ltd Scaffolding constructions
GB1471356A (en) * 1975-07-29 1977-04-27 Palmers Scaffolding Ltd Scaffolding
DE2704398C3 (de) * 1977-02-03 1980-08-21 Plettac Gmbh, 5970 Plettenberg Aus Ständern und Riegeln zusammensetzbares Gerüst
FR2447434A1 (fr) * 1979-01-23 1980-08-22 Somefran Entretoisement d'echafaudage, et elements d'echafaudage pour le montage de cet entretoisement
FR2533610B1 (fr) * 1982-09-23 1985-10-04 Somefran Procede de montage d'un echafaudage, contreventement utilise pour la mise en oeuvre de ce procede, et echafaudage equipe dudit contreventement
WO1988003212A1 (fr) * 1986-10-28 1988-05-05 Lubeca Contruction Systems Pty. Ltd. Systeme d'echafaudage
GB2238571B (en) * 1989-11-01 1994-03-09 Grayston Central Services Scaffolding

Also Published As

Publication number Publication date
ES2093081T3 (es) 1996-12-16
GB2251451A (en) 1992-07-08
EP0718452A3 (fr) 1996-08-14
DE69121679T2 (de) 1997-01-23
EP0718452A2 (fr) 1996-06-26
IE914233A1 (en) 1992-06-17
DE69121679D1 (de) 1996-10-02
EP0489599A1 (fr) 1992-06-10
IE76453B1 (en) 1997-10-22
GB9026567D0 (en) 1991-01-23

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