WO2012123929A1 - Moyen de support destiné à être utilisé dans un échafaudage - Google Patents

Moyen de support destiné à être utilisé dans un échafaudage Download PDF

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Publication number
WO2012123929A1
WO2012123929A1 PCT/IB2012/051297 IB2012051297W WO2012123929A1 WO 2012123929 A1 WO2012123929 A1 WO 2012123929A1 IB 2012051297 W IB2012051297 W IB 2012051297W WO 2012123929 A1 WO2012123929 A1 WO 2012123929A1
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WO
WIPO (PCT)
Prior art keywords
ledger
scaffold
support means
ledgers
lengthwise
Prior art date
Application number
PCT/IB2012/051297
Other languages
English (en)
Inventor
Marc Keersmaekers
Original Assignee
Marc Keersmaekers
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 Marc Keersmaekers filed Critical Marc Keersmaekers
Publication of WO2012123929A1 publication Critical patent/WO2012123929A1/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
    • E04G5/00—Component parts or accessories for scaffolds
    • 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
    • E04G5/007—Devices and methods for erecting scaffolds, e.g. automatic scaffold erectors

Definitions

  • Support means for use in a scaffold
  • the present invention relates to the field of scaffolding constructions, elements thereof and methods for erection thereof.
  • BE 20100443 describes a lift unit or climbing lift
  • a lift unit for ascending and descending in a shaft formed by a scaffold column of a scaffold, the scaffold column comprising at least one scaffold section, each scaffold section being defined by uprights and ledgers, comprising a first part adapted to enable fixing at different heights to the scaffold by means of a first set of fixing means;
  • a second part adapted to enable fixing at different heights to the scaffold by means of a second set of fixing means
  • BE20100442 describes a lift system generically as:
  • a lift system for use in a scaffold column of a scaffold, the scaffold column comprising at least one scaffold
  • each scaffold section being substantially defined by uprights and ledgers, the lift system comprising:
  • a lifting means which is adapted at a first outer end thereof to be coupled to the frame and is adapted at a second outer end thereof to be coupled to the lift unit, and which is adapted to control the ascent or descent of the lift unit in the scaffold.
  • the above stated applications also specify a guide system for a carrier unit or lift unit adapted to be mounted on the ledgers of the scaffold and adapted for coupling to the displacing means (e.g. wheel mechanisms) of a carrier unit or lift unit. They describe lifts which can be provided with displacing means.
  • the displacing means can comprise a number of (for instance four) wheel mechanisms which can optionally be driven and which are adapted to move (for instance travel) on a rail system which can be arranged through the scaffolding construction at a determined ledger level (for instance ground level) .
  • This lift unit can in this way be readily displaced through the whole scaffolding construction via the determined level (for instance ground level) , particularly to adjacent scaffold columns.
  • This rail system preferably comprises at least two rails which are adapted for mounting on the ledgers of the scaffold, and which are on the other hand adapted for coupling to the displacing means of the lift unit (for instance to wheels of the wheel mechanisms of the lift unit).
  • a scaffold comprising at least two horizontally adjacent scaffold sections, wherein the scaffold sections are defined substantially by lengthwise ledgers, transverse ledgers and uprights, and wherein the scaffold comprises a guide means adapted to be able to displace in substantially horizontal direction therealong a displaceable platform corresponding thereto and guided thereby.
  • the displacement can preferably take place through a distance greater than the width of one scaffold section.
  • a scaffold is described wherein the guide means is adapted to allow a further erection of the scaffold when it is arranged on a present highest level of the scaffold.
  • a scaffold in which the guide means and the corresponding displaceable platform are adapted to enable displacement of the platform substantially inside and through the at least two mutually adjacent scaffold sections.
  • a scaffold in which the guide means comprises at least one rail arranged in a direction parallel to the lengthwise ledgers.
  • a scaffold in which the guide means comprises two rails arranged in a direction parallel to the lengthwise ledgers.
  • a scaffold in which the lengthwise ledgers at least partially form the guide surface of the rails.
  • a scaffold in which the lengthwise ledgers run along the inner side of the scaffold sections defined by respective uprights.
  • the uprights of the scaffold are typically all identical.
  • the uprights preferably have a square or
  • a scaffold is described in which the lengthwise ledgers are fixed to respective support means, the support means themselves being fixed to the uprights at an appropriate height and being adapted for coupling to the ledgers.
  • the support means are preferably secured by means of bolts which can be arranged through aligned holes in diametrically opposite longitudinal surfaces of the upright.
  • a scaffold in which the length of the rail parts comprised in the support means is substantially greater than the width of an upright. This for at least several of the support means (for instance support blocks of the support block ledger or half support block ledger type) .
  • a scaffold is described in which the length of the rail parts comprised in the support means is substantially equal to the width of an upright .
  • a scaffold is described in which at least one outer end of a rail part comprised in the support means of an upright protrudes substantially outside a plane defined by the corresponding upright and another upright which are connected to each other by means of a transverse ledger.
  • a scaffold in which the rail part of the support means protrudes over a distance greater than 40 cm, greater than 50 cm, greater than 60 cm.
  • the rail part can for instance protrude about 50 cm or about 60 cm or about 70 cm on one or both sides of the scaffold. Allowing the rail parts to protrude leaves space available on a climbing lift or ork- floor where a worker can take up position adjacently of substantially horizontally stacked scaffolding material, such as for instance lengthwise ledgers.
  • a scaffold is described in which the guide surface of the rails and of possible rail parts of the support means are formed by elongate rods of square cross-section.
  • these rods when the rails are mounted horizontally in appropriate manner in the scaffold, comprise two diagonally opposite longitudinal ribs running in the same vertical plane. The other two ribs are then situated in the same horizontal plane.
  • the use of a spacer is not necessary between the rods and the rest of the ledgers or support blocks. Production is easier and allows the use of simple and efficient locking mechanisms, which can be used to secure a displaceable platform against release. Such a mechanism can for instance engage under the edge of the two ribs in the same horizontal plane.
  • a scaffold in which the outer ends of the lengthwise ledgers are fixed to the respective support means by means of substantially two fixing points, such as for instance threaded rod elements fixed to the support means and corresponding nuts which can tighten the outer end of the lengthwise ledgers against the respective support means, wherein each of the outer ends of the lengthwise ledgers comprise two guide slots which are adapted, during placing of the ledger, to be able to successively receive
  • first fixing points such as threaded rod elements
  • second fixing points such as threaded rod elements
  • a scaffold is described in which, after the first fixing point, e.g.
  • the first fixing point e.g. threaded rod element
  • the first fixing point can serve temporarily as sole support point for the ledger.
  • a scaffold in which at least two adjacent support means are further connected in the width direction of the scaffold by means of a respective transverse ledger, this transverse ledger being adapted such that the forward movement of the displaceable platform along the guide means is not obstructed.
  • the transverse ledger is arranged here at a height which is lower than the height of the top side, or even lower than the height of the underside of the
  • a scaffold comprising at least one fold-up diagonal.
  • the fold-up diagonal comprises four arms, such as for instance rods, which are each connected at a first outer end to a shared rotation means and at another outer end to suitable locations on the scaffold. Suitable locations can for instance be holes in the uprights or connection points to associated support means.
  • a scaffold which further comprises a climbing lift or lift cage or is adapted for co-action therewith, for the purpose of carrying scaffolding material up and downward in a scaffold column, for instance as described in BE20100443 and BE20100442.
  • a scaffold is described in which the one or more rails are mounted on the transverse ledgers.
  • a method for erecting a scaffold comprising at least two horizontally adjacent scaffold sections, the scaffold sections being defined substantially by lengthwise ledgers, transverse ledgers and uprights, comprising of: - erecting a first level of a scaffold, the first level comprising at least two horizontally adjacent scaffold sections ;
  • the lift platform ascending to the second level of the scaffold with the lift platform, the lift platform carrying scaffolding material suitable for further erection of the scaffold.
  • horizontally mobile platform which is adapted for guiding by guide means, for instance travel rail ledgers and support block ledgers according to embodiments of the present invention.
  • the mobile platform preferably comprises a number of wheel devices, for instance four, six or eight wheels.
  • Two, three or four aligned wheel devices can for instance be present on each of the sides in the longitudinal direction of the mobile platform.
  • these wheel devices can be retracted and extended in a direction substantially perpendicular to the longitudinal direction of the mobile platform typically corresponding to the longitudinal direction of the scaffold. This can in specific cases simplify the installation, storage or passage of the platform.
  • the mobile platform comprises a first floor part adapted to receive a person, and a second floor part adapted to stock material such as scaffolding material, construction material or other material and to be carried upward relative to (moved a distance from) the first floor part.
  • first floor part adapted to receive a person
  • second floor part adapted to stock material such as scaffolding material, construction material or other material and to be carried upward relative to (moved a distance from) the first floor part.
  • the second floor part is located centrally in the mobile platform and the platform comprises for instance two first floor part, each at a different outer end of the second floor part, at the outer end of the mobile platform.
  • the wheels of the mobile platform can be without driving, or can be driven manually or mechanically by means of a drive mechanism.
  • a ledger for use in a scaffold which comprises at each of its outer ends a coupling means comprising guide slots adapted to be able, during placing of the ledger, to successively receive respectively a first fixing point, e.g. threaded rod element, and a second fixing point, e.g. threaded rod element, which are located at fixed positions of a first fixing point, e.g. threaded rod element, and a second fixing point, e.g. threaded rod element, which are located at fixed positions of a first fixing point, e.g. threaded rod element, and a second fixing point, e.g. threaded rod element, which are located at fixed positions of a first fixing point, e.g. threaded rod element, and a second fixing point, e.g. threaded rod element, which are located at fixed positions of a first fixing point, e.g. threaded rod element, and a second fixing point, e.g. threaded rod element, which are located at fixed
  • This scaffolding element can preferably be a support means, such as for instance a support block ledger.
  • the ledger can be a width ledger (also referred to as transverse ledger) or lengthwise ledger of the scaffold.
  • a ledger is
  • coupling plate which is substantially flat and the main surface of which lies perpendicularly of the longitudinal direction of the ledger and in which the fixed positions of the first and second fixing point (e.g. threaded rod
  • the two fixing points are a lower fixing point and an upper fixing point, the upper fixing point being placed higher than the lower one, and wherein the two slots are also a lower slot and an upper slot, the upper slot lying higher than the lower one.
  • a ledger is
  • a ledger is
  • the upper slot further extends in an upward curving circular arc corresponding to a rotation of the ledger round the first fixing point.
  • the coupling plate comprises a recess on the rear side close to the outer end of the arcuate upper slot which can receive a nut coupled to the upper threaded rod element, this preferably in a manner such that the threaded rod element-nut connection, in the possible case it comes loose, resulting in the ledger possibly rotating away, would be blocked by the recess.
  • the upper slot extends further upward in curved manner, wherein the positions of the outer ends of the lower slot and of the upper slot are adapted to each other such that they can simultaneously receive the
  • a ledger is
  • a ledger is
  • a ledger is
  • a ledger is
  • the rod when the ledger is mounted in the scaffold, comprises two diagonally opposite longitudinal ribs running in the same vertical plane.
  • a ledger is described in which the rod is connected to the coupling means above the second slot.
  • a ledger in a scaffold as lengthwise ledger is described, wherein the length of the ledger is substantially smaller than the distance between the two uprights it helps to connect.
  • a ledger in a scaffold as lengthwise ledger
  • the lengthwise ledgers are connected to the uprights by means of accessories such as support block ledgers connected to the respective uprights .
  • a support means is described for use in the erection of a scaffold, wherein the support means is adapted to enable connection to an upright and to enable connection to at least one lengthwise ledger of the scaffold.
  • Such a support means can be attached to an upright during the erection of a scaffold before making couplings to width and/or lengthwise ledgers.
  • a support means is described which is further adapted to enable connection to a width ledger of the scaffold.
  • a support means which further comprises a ledger part which, when the support means is connected to an upright in a scaffold, protrudes substantially at least on one side in the
  • a support means which comprises a ledger part of a lengthwise ledger which, when the support means is connected to an upright in a scaffold, protrudes substantially on both sides in the longitudinal direction of the scaffold out of the plane defined by the upright to which the support means is connected and the adjacent upright in the width direction.
  • a support means in which the ledger part protrudes at least 30 cm, at least 40 cm, at least 50 cm, at least 60 cm on one or both sides.
  • a support means is described in which the outer ends of the ledger part are adapted to enable connection to a ledger for the scaffold.
  • a support means in which the outer ends of the ledger parts comprise a first and a second fixing point, e.g. threaded rod element, at fixed positions, the longitudinal direction of which is parallel to the longitudinal direction of the ledger part.
  • a support means is described in which the outer ends of the ledger parts comprise a coupling plate which is substantially flat, and the main surface of which lies perpendicularly of the longitudinal direction of the ledger part, the coupling plate comprising the first and the second fixing points.
  • a support means in which the support means comprises a first and a second fixing point for the purpose, when coupled to an upright, of being coupled to a width ledger.
  • a support means is described in which the ledger part is adapted so that it can form part of a guide means through a scaffold along which a corresponding displaceable platform guided thereby can be displaced in substantially horizontal direction.
  • a support means in which the guide surface of the ledger part is formed by substantially two elongate rectangular surfaces lying substantially at a right angle.
  • a support means is described in which the guide surface of the ledger part is formed by elongate rods of square cross-section.
  • a support means is described wherein these rods, when the support means are mounted in the scaffold, comprise two diagonally opposite longitudinal ribs running in the same vertical plane.
  • each threaded rod element is provided with a corresponding nut, and further comprising a removable blocking means which prevents undesired release of the nut from the threaded rod element.
  • a lengthwise ledger can be externally connected to these successive uprights. This can take place on both the front and the rear side of the scaffold for the same scaffold section or scaffold column.
  • a locally wider scaffold section or scaffold column can in this way be constructed, this being useful for instance when a lift system is used in this column in combination with a separately displaceable
  • a stabilizing element for use in a scaffold comprising at least two arms or rods which can be oriented relative to each other and which are each connected at a first outer end to a shared folding means and comprise at another outer end a connecting means adapted for fixing to elements of the scaffold.
  • a stabilizing element for use in a scaffold comprising at least four arms or rods which can be oriented relative to each other and which are each connected at a first outer end to a shared folding means and comprise at another outer end a connecting means adapted for fixing to elements of the scaffold.
  • a stabilizing element for use in a scaffold which is adapted to be able to orient the arms such that they come to lie substantially parallel, wherein their first outer ends and their second outer ends coincide.
  • the two or four arms or rods can thus be folded together so that they become shorter and can still be stocked horizontally.
  • a stabilizing element for use in a scaffold is described in which the orientation means comprises a central ring structure and wherein the first outer ends of the arms comprise a ring structure, which arms are each connected to this ring as chain links (interconnected links). This provides for a strong connection and allows folding together of the two or four arms .
  • a stabilizing element for use in a scaffold in which the second outer ends of the arms are adapted so that they can be attached to the uprights of the scaffold.
  • a stabilizing element for use in a scaffold in which the second outer ends of the arms are adapted so that they can be attached to support means for ledgers of the scaffold, the support means being fixed to respective uprights.
  • a stabilizing element for use in a scaffold in which the second outer ends of the arms are adapted for fixing to holes in the uprights or support means by means of a fixing means such as a threaded rod element or a pin.
  • a scaffold comprising at least one scaffold section and at least one stabilizing element as described above, wherein each of the second outer ends of the arms of the stabilizing element is secured close to one of the four corners of the front plane of a scaffold section formed by the two uprights and two lengthwise ledgers defining the plane.
  • the use of such diagonals allows the stability of the scaffold to be increased, and the diagonals can be stocked horizontally.
  • the fold-up diagonals with four arms do in fact comprise two diagonals in one and provide for an extra strength of the scaffold structure which has often been realized in the prior art by placing diagonals in the width direction. In embodiments of the present invention this is not possible or is so to only limited extent, since mobile platforms are used .
  • a scaffold in which the central ring structure lies in a plane substantially parallel to the front plane of the scaffold-
  • fixing points are a threaded rod or threaded rod element.
  • These threaded rod (elements) can for instance also be bolts or bolt elements, such as for instance an outer end of a bolt comprising screw thread.
  • the use of alternative fixing means or coupling means which replicate the functionalities as described for the bolts (or threaded rods) and nuts for the present invention is not precluded.
  • Figure 1A is a perspective view of a scaffold concept according to embodiments of the present invention.
  • Figure IB is a top view of such a scaffold which shows a diagonal present in a horizontal plane in one of the sections.
  • FIGS 2A to 21 show details of Figure 1A.
  • Figures 3A to 3D show front, top, rear and side views of a support block ledger according to eiabodiments of the present invention *
  • Figures 4A to 4 ⁇ show respectively a front view, a rear view, a cross-sectional view along the line A-A in Figure 4A and a side view of a half support block ledger according to embodiments of the present invention.
  • Figure 5A shows a side view of a lengthwise ledger according to embodiments of the present invention.
  • Figure 5B is a front view of the coupling means of the ledger which
  • Figures 6A to 6F illustrate embodiments of a connecting ledger according to embodiments of the present invention.
  • Figure 6A shows a perspective view
  • Figure 6B a cross- sectional view along line C-C in Figure 6C.
  • Figure 6C is a side view.
  • Figures 6D and E are end views of the ledger.
  • Figure 6F is a top view.
  • FIGS 7 and 8A to 8C illustrate two types of pairs of slots in the coupling means of the ledgers according to embodiments of the present invention.
  • Figures 9A and 9B show a front view and a cross-sectional view in the direction A-A indicated in the front view of a coupling plate of a support block, support block ledger or extension ledger.
  • the coupling means of a half support block ledger is similar.
  • Figure 10 shows a top view of a non-standard construction of a scaffold in which a determined scaffold column has a greater width than the standard scaffold sections.
  • Figures 11A, 11D and HE show respectively a front view, a top view and a perspective view of an extension ledger according to embodiments of the present invention.
  • Figures 11B and 11C show front views of coupling means suitable for coupling to the coupling means of the extension ledger.
  • Figure 1A shows a scaffold according to preferred
  • the scaffold comprises rows and columns (I, II, III) of scaffold sections. Each of these scaffold sections is defined substantially by
  • transverse ledgers 4B The scaffold sections can further be strengthened by the use of diagonals 8. At the bottom the uprights typically comprise a foot jack 7, According to preferred embodiments of the present invention, ledgers 4L, 4B are connected to support means or support blocks 50, 51, 52. An extension ledger 4VL can also be arranged between for instance a support block 52 and a main ledger 4L. These support blocks 50, 51, 52 are in turn connected to uprights 6. Support blocks 50, 51, 52 are further also adapted for coupling to ledgers 4B which mutually connect two adjacent uprights in the width
  • support block ledgers 50, 51, 52 allows arrangement of the ledgers within the section defined by their respective uprights; in other words, the ledgers can be positioned on the interior of the scaffold defined by the uprights, i.e. on the side of the uprights pointing inward into the scaffold.
  • These ledgers are preferably also adapted to serve as guide means for a platform guided displaceably thereby.
  • the displaceable platform typically comprising a wheel device 31, a work-floor 33 and a rail 32, can be displaced over this guide surface of the lengthwise ledgers. This by allowing co-action of the wheels of wheel device 31 with the rails formed by, among other parts, the lengthwise ledgers and parts of the support blocks.
  • the support blocks can themselves be provided for this purpose with a rail part or ledger part which, together with a guide surface of ledgers 4L, form a continuous rail through the scaffold construction at a determined ledger level. This is possible for instance at each ledger level.
  • displaceable platform is preferably a lift cage or a
  • a lift cage is described as an alternative platform allowing movement up and downward in vertical direction in a scaffold column.
  • These respective climbing lift or lift cage devices are then preferably provided with guide means 31 which can co-act with the rails formed by lengthwise ledgers 4L and the respective support blocks or support block ledgers 50, 51, 52.
  • guide means 31 which can co-act with the rails formed by lengthwise ledgers 4L and the respective support blocks or support block ledgers 50, 51, 52.
  • displaceable platform is preferably also a vertically displaceable platform, or it can be displaced on such a vertically displaceable platform (and carried into the scaffold from the vertically displaceable platform) .
  • displaceable platform is preferably also a vertically displaceable platform, or it can be displaced on such a vertically displaceable platform (and carried into the scaffold from the vertically displaceable platform) .
  • scaffold column II is a column in which climbing lift 3 can be displaced vertically.
  • the lengthwise ledgers typically extend from upright to upright, or they extend at least from their first outer end located close to the first upright (for instance the rosette of a LayherTM upright) to a similar position on an adjacent upright.
  • the lengthwise ledgers are difficult to stack horizontally here without leaving essential space clear for the personnel erecting the scaffold. Stacking of the scaffold material at an angle or vertically is less obvious.
  • the displaceable platform can displace along the rails at a determined level in substantially horizontal direction, a complete row of scaffold sections can be erected quickly and efficiently by travelling with a
  • the displaceable platform can once again be placed on a climbing lift device situated in the wider scaffold column II or, when the climbing lift itself serves as displaceable
  • this climbing lift can preferably be re-placed in scaffold column II.
  • the climbing lift optionally with a displaceable platform 3 placed thereon, can then ascend a level further in the scaffold and the following row of scaffold sections can be erected in similar manner.
  • the climbing lift can descend via the optionally wider scaffold column II to ground level to load material for further construction.
  • the scaffold system according to aspects of the present invention is indeed a very rapid, efficient and so less cost-intensive solution for erecting scaffolding constructions.
  • the climbing lift device is itself the mobile platform.
  • the climbing lift can for instance be converted to a lift cage system or lift system or, after removal of the climbing lift, such a lift system can be arranged in a determined scaffold column.
  • the lift system preferably comprises a guide means for guiding a
  • Such a guide can for instance be realized by using rail elements of the type used for the ledgers and support block ledgers and arranged on a floor part of the lift system.
  • Mobile platforms can then be arranged at one or more levels of the scaffold in order to perform determined operations on for instance a building. It is therefore no longer necessary to have to arrange work- floors in the scaffold, this resulting in quite some time- saving.
  • These mobile platforms can be arranged permanently at specific or all levels of the scaffold during work operations. It is also possible for one or more displaceable platforms to change level in the scaffold during work operations by making use of the lift system.
  • a lift system is used in a standard scaffold construction and the horizontally displaceable platforms are adapted to retract/extend the wheels in the transverse direction.
  • at least one wider scaffold column can be erected in which the lift system will later be arranged. The width of the lift platform can then be relatively greater, and this allows the use of
  • the guide system is arranged only at a determined, e.g. the lowest, level of a scaffold, typically for use with scaffold
  • a complete scaffold column can be erected to a predetermined height by making use of for instance a guide system, e.g. LayherTM systems, a complete scaffold column can be erected to a predetermined height by making use of for instance a guide system, e.g. LayherTM systems, a complete scaffold column can be erected to a predetermined height by making use of for instance a guide system, e.g. LayherTM systems, a complete scaffold column can be erected to a predetermined height by making use of for instance a guide system, e.g. LayherTM systems
  • the climbing lift can then descend back to ground level and travel on the rails arranged in the lowest level of the scaffold to for instance the adjacent scaffold column. This can then be erected vertically in similar manner, and so on.
  • Existing scaffolding systems can also be improved in such manner, for instance in the sense that the erection/dismantling thereof can be accelerated.
  • support block ledger 51 is typically advantageous close to an outer end of the scaffolding construction (for instance on the left or right) where no further erection is required.
  • Support block elements 50, 51, 52 can in any case be coupled to further ledgers or
  • extension ledgers This can take place by means of different mechanisms, several of which are described below.
  • the connection between width ledgers 4B and the associated support blocks 50, 51, 52 can also take place by means of the same coupling mechanisms.
  • Figure IB shows a top view of the scaffold of Figure 1A.
  • the section furthest to the right here comprises a diagonal according to embodiments of the present invention.
  • Figures 2A to 2G show details of Figure 1.
  • Figure 2A shows a perspective view of a half support block ledger 51 coupled to an upright 6 in the longitudinal direction of the
  • Figure 2B is similar but illustrates the use of a full support block ledger 50.
  • Figure 2C shows the coupling between a lengthwise ledger 4L and an extension ledger 4VL in more detail.
  • Figure 2D shows the other side of extension ledger 4VL coupled to a support block 52. Support block 52 is connected to upright 6 and is coupled to a width ledger 4B. On the other side of the support block in the
  • Figure 2E further illustrates a diagonal 8 as example of a stabilizing
  • Diagonal 8 comprises at least two, and here four arms 81 (e.g. rods) which can be oriented relative to each other and which are each connected at a first outer end 811 to a shared folding means 82 and at another outer end comprise a connecting means (812, 813, 814, 815, 816, 817) which is adapted for fixing to elements- of the scaffold.
  • the first outer end of arms 81 can for instance end in a ring structure which is connected as a chain link to a central ring 82.
  • a similar ring structure 812 can for instance.
  • the connecting means can for instance also comprise a second part 816 lying for instance, though not necessarily, at an angle to first part 814 differing from 180 degrees.
  • This angle is for instance predetermined as a function of the size of respective typical scaffold dimensions and as a function of where exactly the coupling between the coupling plate and the scaffold, for instance upright, support block or support block ledger, has to take place.
  • the angle can be determined such that the first part 814 comes to lie in line with the corresponding rod 81 when the diagonal is placed in a corresponding scaffold section.
  • the second part typically comprises a hook-like recess 817 which allows hooking behind a threaded rod, for instance of a bolt.
  • the second part 816 can be tightened against the upright by means of a nut, or the bolt, and the diagonal can be locally secured.
  • the use of a hook-like recess allows a simple coupling to the threaded rod. This is illustrated in figures 2F, 2G, 2H and 21.
  • Central ring 82 and ring structures 812 can in this way come to lie in a plane parallel to the plane defined by the rectangle spanned by the diagonal in the scaffold.
  • the two or four arms 81 can be folded together because of the central ring structure 82, the orienting means.
  • the length of the diagonal can hereby be reduced, this enabling horizontal stacking of the diagonal on a work platform, horizontally and/or vertically displaceable platform.
  • a diagonal embodied with four arms 81 as described further provides an additional stability factor when compared to the situation in which two independent diagonals were to
  • Figures 3A to 3D show support block ledgers 50 in more detail.
  • Figure 3A shows a front view, figure 3B a top view, figure 3C a rear view and figure 3D a side view of this support block ledger.
  • the upper surface 501 of the support block ledger forms a guide surface for a displaceable platform. This is not however essential.
  • the support block ledger according to this embodiment comprises a central support block 502 which is provided with two recesses 5021 and 5022 on its rear side.
  • the central support block can for instance comprise a piece of hollow, square or rectangular tubing provided with the necessary openings and coupling means.
  • Central support block 502 can then be coupled using two bolts which are attached through upright 6 by coupling to respective nuts on the rear of the upright.
  • the heads of the relevant bolts can slide here in support block 502 behind a rear surface 5023 of central support block 502. By tightening the nuts on the rear of the upright the central support block or the support block ledger can thus be fixed to upright 6.
  • the central support block is further provided with a coupling means adapted for coupling to transverse ledgers 4B which will be described in further detail.
  • This coupling means preferably comprises two threaded rod elements 5024A and 5024B which can be provided with nuts 5025A and 5025B. After coupling of threaded rods 5024A and 5024B to slots in the coupling means of transverse ledgers 4B, as will be described below, and tightening nuts 5025A and 5025B, transverse ledger 4B can be fixed to support block 502.
  • Central support block 502 is further connected to at least one elongate ledger part 50A which in determined embodiments can form a part of a rail, a guide means for a displaceable platform.
  • This rail part 50A extends on both sides of central support block 502. This can for instance be at a distance on either side of for instance 30, 40, 50, 60 or more centimetres.
  • coupling means for coupling to travel rail ledgers as will be described below (in
  • the coupling means at both outer ends of rail part 50A here comprise a plate element provided with two threaded rod elements, a first threaded rod element 5026A situated above a second threaded rod element 5026B, to which travel rail ledgers can be coupled in similar manner as described for the coupling between threaded rod elements 5024A and 5024B.
  • the support block ledger can further also comprise a lower ledger part 50B which likewise extends on either side of central support block 502 and is possibly also further connected to rail part 50 ⁇ by means of additional connecting elements 503.
  • Lower rail part 50B is also connected to central support block 502 and to the coupling means at the outer ends of the support block ledger, for instance using the coupling plates comprising the threaded rod elements.
  • a strengthened support block ledger or, as will be described below, a corresponding strengthened travel rail ledger is formed in this manner. Threaded rod elements 5026A and 5026B and the corresponding nuts 5027A and 5027B lie in
  • rail part 50A comprises a rod of square cross-section which is tilted. When the support block ledger is installed in the scaffold, the rod can be
  • ledger part 50A (which in determined embodiments is typically a rail part) allows a connection between ledger part 50A and the rest of the support means to be realized in simple manner (e.g. is easily welded) and also allows a locking mechanism to be realized in simple manner between wheel device 31 of a displaceable platform 3 and ledger part 50A. Note that the chosen pitch of the relevant threaded rods
  • FIGS 4A-4D show so-called half support block ledgers 51. These half support block ledgers are wholly similar to the support block ledgers illustrated in figures 3 and 4, although ledger parts 51A and 51B extend here along only one side of central support block part 512.
  • central support block part 512 comprises threaded rod elements 5126A and 5126B and corresponding nuts 5127A and 5127B.
  • Central support block 512 can hereby be coupled to for instance travel rail ledgers which are described belo .
  • Ledger 4L comprises a coupling means 4L4 at each of its outer ends .
  • the coupling means preferably comprises guide slots 4LS1 and 4LS2 adapted to be able, during placing of the ledger, to successively receive respectively a first threaded rod element and a second threaded rod element situated at fixed positions.
  • These threaded rod elements are preferably arranged at an outer end of the support blocks or support block ledgers as described above in the longitudinal direction of the
  • the travel rail ledger preferably comprises a first rod 4LA which substantially defines the length of the ledger and which is coupled to coupling means 4L4 at its outer ends.
  • this rod can serve as guide means for a displaceable platform (formed for instance by two parallel rods, two parallel ledgers) .
  • the rod can for instance comprise a square cross-section.
  • the first rod 4LA of square cross-section can be oriented such that it lies with two diametrically opposite longitudinal ribs in a substantially vertical plane, as also described in respect of the support block ledger. The two other diametrically opposite longitudinal ribs then lie in a substantially horizontal plane.
  • the use of a guide surface formed hereby in combination with wheels on a displaceable platform which form a complementary guide surface provides for an increased stability of the displaceable platform on the formed rails.
  • displaceable platform can for instance comprise a
  • the travel rail ledger also comprises a second connecting element, such as a connecting rod 4LB, which is also connected at its outer end to coupling means 4L4 and which is also connected in between to the first connecting element, the first rod 4LA, by means of support structures 4L3.
  • a second connecting element such as a connecting rod 4LB, which is also connected at its outer end to coupling means 4L4 and which is also connected in between to the first connecting element, the first rod 4LA, by means of support structures 4L3.
  • the travel rail ledger (more generally the lengthwise ledger) and the width ledger comprise a modified structure on their head.
  • This structure comprises a substantially flat plate 4L4S which in determined embodiments can form part of a bracket structure substantially comprising two slots 4LS1 and 4LS2.
  • Guide slots 4LS1 and 4LS2 are for instance
  • the fixed position of the first and second threaded rods on the support blocks or support block ledgers is preferably such that they run parallel to the longitudinal direction of the ledgers when the guide slots receive the threaded rod elements and a coupling is thus formed between the ledger and the support block or support block ledger.
  • the slots can preferably comprise a lower slot 4LS1 and an upper slot 4LS2, wherein the upper slot lies at a higher position than the lower one.
  • Lower slot 4LS1 is substantially straight and extends substantially vertically upward through a predetermined distance from the lower edge of the coupling plate.
  • a travel rail ledger or a width ledger is coupled to the threaded rod elements of the support means, such as support blocks or support block ledgers as described above, this can preferably take place by having the lower slot 4LS1 coupled to the lower threaded rod on the respective support blocks or support block ledgers.
  • upper slot 4LS2 extends from a lateral edge of the coupling plate and the upper slot comprises an entry opening at a height adapted to correspond to the predetermined position of the second bolt relative to the first bolt.
  • the upper slot preferably extends further upward in a curve.
  • the slot comprises a lower edge 4LS22 and an upper edge 2LS21 which come together at a highest point at the end of slot 4LS2.
  • the positions of the outer ends of the lower and upper slot are preferably adapted such that they can
  • the upper edge (or upper guide surface) of slot 4LS2 of the upper slot further comprises locally a downward directed dip 4LS23.
  • This dip 4LS23 blocks the passage of the second threaded rod in second slot 4LS2 in the first instance after the second threaded rod has been received to limited extent by the second slot as a result of rotation of the ledger around the first bolt.
  • the temporary blocking of the second threaded rod by this dip 4LS23 can be released by slightly lifting the ledger. This is preferably done through a distance smaller than the length of the lower slot, so that the coupling between the lower slot and the first threaded rod is not released. Slight lifting of the ledger in
  • the positions of the threaded rods preferably correspond here with the outer ends of the slots 4LS1 and 4LS2.
  • the connection between the connecting elements (e.g. connecting rods) 4LA and 4LB and the coupling plates of coupling means 4L4 consequently takes place at locations differing from the locations of slots 4LS1, 4LS2 so as not to obstruct the coupling to the threaded rod elements by means of the slots.
  • Upper rod 4LA can thus be fixed to the coupling plate above the second slot and lower rod 4LB can be fixed between the first slot and the second slot.
  • the second rod can consequently be curved upward close to its outer ends, while away from its outer ends it is situated a constant distance from the first rod.
  • a coupling means of the bracket type is used as coupling means for the width ledgers (also referred to as transverse ledgers or connecting ledgers) 4B.
  • Such a structure allows tightening of respective nuts from inside the bracket in order to realize the coupling to respective support blocks or support block ledgers.
  • Such a ledger can comprise the same coupling structures with slots as described for the travel rail ledger or lengthwise ledger.
  • Figure 6A shows a perspective view
  • figure 6B shows a cross-section along the line C-C of figure 6C.
  • Figure 6C shows a side view of the connecting ledger.
  • Figures 6D and 6E show side views of the coupling means and figure 6F shows a top view of the connecting ledger.
  • the width ledgers can also be embodied without bracket structure, for instance with only a flat coupling plate as described for the lengthwise ledgers.
  • Width ledgers 4B are further preferably embodied such that the upper surface of the upper connecting element 4BA lies below, preferably substantially below, the height of the upper side of connecting part 4LA so as not to obstruct the passage of a displaceable platform.
  • connecting ledger is preferably also of the double ledger type and consequently also comprises a connecting part 4BB which can for instance be embodied as a cylindrical rod.
  • Connecting parts 4BA and 4BB are preferably connected to each other by means of support structures 4B3. This
  • connecting ledger 4B is described in more detail in figures 6A-6F.
  • Figures 8A and 8B show in more detail the coupling means which will preferably be used for width ledgers 4B.
  • the recess or opening 4L4U, 4B4U arranged at the bottom of the bracket to allow the passage of nuts or bolt heads.
  • Figure 7 shows an alternative coupling means which can be used for both lengthwise ledgers and width ledgers for the purpose of coupling to the threaded elements of the support blocks or support block ledgers.
  • the coupling mean shown here is of the bracket type and can preferably be used for width ledgers 4B.
  • the coupling means can also comprise a single plate, this preferably for the lengthwise ledgers. There is then no recess 4L4U. Slots 4LS1, 4BS1, 4LS2 and 4BS2 can be identical to those described for figure 8.
  • the coupling means comprises an upper slot 4LS2, 4BS2 which extends from a lateral edge of the coupling plate (bracket) and which comprises an entry opening lying at the height adapted to correspond to the predetermined position of the second threaded rod of the support block or the support block ledgers relative to the first threaded rod.
  • the upper slot further extends in an upward curving circular arc. The curvature of the circular arc corresponds to the rotation of the ledger round the first threaded rod.
  • the coupling plate therefore preferably comprises on the rear side a recess 4LS24, 2BS24 which can receive, close to the outer end of the circular upper slot 4LS2, 4BS2, a nut which is coupled to the upper threaded rod when this nut is screwed on.
  • Figure 9A shows a front view of a coupling plate such as can be comprised at the outer end of a support block ledger 50, half support block ledger 51 or extension ledger 4VL.
  • a head 504 of a support block ledger 50 is for instance considered (see also figure 3A) .
  • Figure 9B shows a cross-sectional view along the line A- A in figure 9A.
  • the bolts or threaded rod elements 5043 are arranged in holes 5041 in plate 504. Holes 5041 comprise for this purpose screw thread 5042 into which the first
  • a longitudinal part of bolt 5042 with a first diameter dl can be tightened.
  • a second longitudinal part of the bolt has a broader diameter d2, wherein the transition from the part with diameter dl to the part with diameter d2 is stepped.
  • the part with diameter d2 hereby provides for a blocking effect from a determined screw-in depth of the bolt into opening 5041.
  • the bolt does not comprise a classic "head” here but comprises an opening 5046, for instance a hexagonal opening, but also any other known form of opening, in which a screwing means such as a screwdriver or key can engage in order to realize screwing-in of the bolt.
  • a nut 5045 can then co-act with a screw thread on the protruding part of the bolt.
  • the bolt can optionally also be arranged through an opening in a plate and secured by means of a nut or other element with screw thread along the rear side of the opening.
  • Figures 11A to HE illustrate the extension ledger 4VL.
  • a ledger can be used to later erect on for instance a support block 52, or on the side without ledger part in a half support block ledger 51, a scaffold section with a length substantially greater than the length of extension ledger 4L.
  • the extension ledger comprises at a first outer end a first coupling means 4VL41 and at a second outer end a second coupling means 4VL42.
  • connecting parts 4VLA (upper) and 4VLB (lower) connect these two coupling means and are connected to each other by means of support means 4VL3-
  • the structure at the second outer end 4VL42 corresponds to the structure of coupling means 504 of the ledger as described for instance in figures 5A and 5B, 8B.
  • the structure at the first outer end corresponds for instance to the structure at the outer end of the ledger part of a support beam ledger as for instance described with reference to figures 3A or 4A.
  • the coupling means of the longitudinal and width ledgers as described in the present invention can also be coupled to each other by means of bolts and nuts. This allows, if desired, mutual coupling of two or more

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Movable Scaffolding (AREA)

Abstract

L'invention porte sur un moyen de support (50 ; 51 ; 52) destiné à être utilisé dans le montage d'un échafaudage (1), lequel moyen comprend des montants verticaux (6) et des longerons dans le sens de la longueur (4L), lequel moyen de support (50 ; 51 ; 52) est apte à permettre une liaison avec l'un des montants verticaux (6) et au moins un longeron dans le sens de la longueur (4L) de l'échafaudage (1), de telle sorte que le ou les longerons dans le sens de la longueur (4L) se trouvent à l'intérieur d'une section définie par les montants verticaux adjacents (6), le moyen de support (50 ; 51 ; 52) comprenant une surface supérieure (501) formant une surface de guidage pour une plateforme pouvant être déplacée horizontalement dans la direction longitudinale.
PCT/IB2012/051297 2011-03-17 2012-03-19 Moyen de support destiné à être utilisé dans un échafaudage WO2012123929A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2011/0166A BE1019883A5 (nl) 2011-03-17 2011-03-17 Steunmiddel voor gebruik in een steiger.
BE2011/0166 2011-03-17

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WO2012123929A1 true WO2012123929A1 (fr) 2012-09-20

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2448013A1 (fr) * 1979-02-01 1980-08-29 Goubaud Michel Element d'echafaudage
GB2157352A (en) * 1984-03-22 1985-10-23 John Bevan Cole Scaffolding system
FI89401B (fi) * 1991-05-20 1993-06-15 Lohja Ab Oy Anordning foer att utfoera aotgaerder saosom murning eller liknande pao sedvanliga byggstaellningar pao byggnadsvaeggar
DE19741353C1 (de) * 1997-09-19 1998-10-01 Koch Marmorit Gmbh Baugerüst, insbesondere Fassadengerüst
JP2000110341A (ja) * 1998-10-01 2000-04-18 Hasegawa Kogyo Co Ltd 移動足場
DE20020794U1 (de) * 2000-12-08 2001-02-15 Layher W Vermogensverw Gmbh Verstärkungseinrichtung für den Anschlussbereich eines Gerüstes
JP2002167969A (ja) * 2000-12-04 2002-06-11 Protector:Kk 台車付きパイプ構築フレーム
FR2905967A1 (fr) * 2006-09-14 2008-03-21 Sanches Domingos Afonso Systeme d'echafaudage
WO2012006689A1 (fr) * 2010-07-16 2012-01-19 Marc Keersmaekers Echafaudage avec éléments d'échafaudage et procédés pour l'ériger

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2448013A1 (fr) * 1979-02-01 1980-08-29 Goubaud Michel Element d'echafaudage
GB2157352A (en) * 1984-03-22 1985-10-23 John Bevan Cole Scaffolding system
FI89401B (fi) * 1991-05-20 1993-06-15 Lohja Ab Oy Anordning foer att utfoera aotgaerder saosom murning eller liknande pao sedvanliga byggstaellningar pao byggnadsvaeggar
DE19741353C1 (de) * 1997-09-19 1998-10-01 Koch Marmorit Gmbh Baugerüst, insbesondere Fassadengerüst
JP2000110341A (ja) * 1998-10-01 2000-04-18 Hasegawa Kogyo Co Ltd 移動足場
JP2002167969A (ja) * 2000-12-04 2002-06-11 Protector:Kk 台車付きパイプ構築フレーム
DE20020794U1 (de) * 2000-12-08 2001-02-15 Layher W Vermogensverw Gmbh Verstärkungseinrichtung für den Anschlussbereich eines Gerüstes
FR2905967A1 (fr) * 2006-09-14 2008-03-21 Sanches Domingos Afonso Systeme d'echafaudage
WO2012006689A1 (fr) * 2010-07-16 2012-01-19 Marc Keersmaekers Echafaudage avec éléments d'échafaudage et procédés pour l'ériger

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