EP0335311A2 - Hydraulisches Gerüst - Google Patents

Hydraulisches Gerüst Download PDF

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Publication number
EP0335311A2
EP0335311A2 EP89105421A EP89105421A EP0335311A2 EP 0335311 A2 EP0335311 A2 EP 0335311A2 EP 89105421 A EP89105421 A EP 89105421A EP 89105421 A EP89105421 A EP 89105421A EP 0335311 A2 EP0335311 A2 EP 0335311A2
Authority
EP
European Patent Office
Prior art keywords
platform
post
posts
scaffolding
hook
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
EP89105421A
Other languages
English (en)
French (fr)
Other versions
EP0335311B1 (de
EP0335311A3 (en
Inventor
Jean St-Germain
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.)
AVANT-GARDE ENGINEERING Inc
Original Assignee
AVANT-GARDE ENGINEERING Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22648993&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0335311(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by AVANT-GARDE ENGINEERING Inc filed Critical AVANT-GARDE ENGINEERING Inc
Publication of EP0335311A2 publication Critical patent/EP0335311A2/de
Publication of EP0335311A3 publication Critical patent/EP0335311A3/fr
Application granted granted Critical
Publication of EP0335311B1 publication Critical patent/EP0335311B1/de
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
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/18—Scaffolds primarily resting on the ground adjustable in height
    • E04G1/20—Scaffolds comprising upright members and provision for supporting cross-members or platforms at different positions therealong

Definitions

  • the invention relates to scaffolding and, more particularly, to a scaffolding arranged so as to be installed along a building wall for use by workers during the installation of a covering on this wall, by example a brick facing.
  • Conventional scaffolding of the type mentioned above usually consists of detachable frame members arranged to be manipulated by one or two men and to be connected one above the other while the men work progressing upward. along the high scaffolding members. This is very dangerous work and there are often accidents.
  • bricks, mortar and ⁇ or other materials intended to apply a coating on the adjacent building wall must be mounted by winch in small quantities, since the load likely to be transported by this scaffolding is quite small .
  • This type of scaffolding should also be installed very close to the wall, and when there is any obstruction whatsoever, such as a balcony or the like protruding from the wall, erection of the scaffolding becomes very difficult, and it the same is true for laying bricks.
  • the general object of the invention is to provide a scaffolding more particularly intended to be installed adjacent to a building wall, which circumvents the disadvantages mentioned above in that it has posts and a likely working platform to support a heavy load, including a sufficient amount of wall covering material, and in that force means raise the platform by the posts which consist of modular members capable of being installed by a worker on the platform while it is being lifted.
  • Another object of the present invention is to provide a scaffolding as described above, having means allowing a worker on the platform to install fasteners for the posts and tie rods from the posts to the wall. to stabilize the posts while the platform is being lifted and to allow the installation of scaffolding at a sufficient distance from the building wall to clear balconies and others that may protrude from the wall of the building.
  • Another object of the present invention lies in new means for lifting and lowering the platform and its load along the posts.
  • Another object of the present invention is that it provides platform extensions which can be fixed to the working platform itself to elongate adjacent to the building wall, despite the uneven outline of said wall .
  • Another object of the present invention is to provide a scaffolding as described above, which can be installed very quickly and which allows the wall cladding much faster compared to what can be achieved with known scaffolding structures.
  • a scaffolding comprising a base, a pair of spaced-apart posts fixed to and projecting from said base, each post formed of modular post sections, fastening means for fixing in a removable and successive manner said sections of posts above each other, said posts defining substantially equidistant bearing means, a working platform surrounding said posts and capable of being raised and lowered relative to said posts, a pair of anchoring members carried pivotally by said platform adjacent to each post, and alternately and successively engaging with said bearing means for suspending said working platform from said posts at different levels, at least one anchoring member of said pair being a force-controlled member capable of extending and retracting along said posts relative to said working platform in a courtyard at least equal to the vertical spacing between the adjacent bearing means, said platform being able to rise and fall by said members being able to lengthen, means of constraint associated with said anchoring members to cause the automatic engagement of said anchoring members with said bearing means when said platform is raised or lowered, and the other member of said pairs alternately engaging said bearing
  • each post section comprises a trellis frame of quadrangular section forming longitudinal corner members interconnected by transverse bars which constitute said bearing means; and said elongable member comprises a double action hydraulic cylinder pivoted at one end to said platform and having a piston rod elongated from its outer end and forming at its outer end a part engaging a transverse bar.
  • said cylinder is pivoted at its lower end and elongates upwards thereof and said part engaging a transverse bar is formed at the upper end of said piston rod, said cylinder and said piston rod being inclined upwards towards said post, the center of gravity of said jack and of said piston rod being situated between said post and the pivot joint of said jack with said platform, thus constituting the stressing means which cause the automatic engagement of the part engaging the crossbar with any of the crossbars.
  • said portion engaging a cross bar is a first hook projecting downward to partially surround the upper portion of any of the cross bars.
  • a first guide member is attached to and protrudes from said first hook and can slide along the crossbar immediately above during the lifting of said platform. work to pivot said cylinder outside said post against the constraint of its constraint means and to allow said first hook to release the crossbar immediately above.
  • the other of the pair of anchoring members is an arm extending along said post, pivoted to said platform at its lower end and forming a second open hook engaging downwards at its upper end, said second hook being able to engage with successive transverse bars under the action of the constraint means associated with said arm when said platform is raised or lowered.
  • said constraint means associated with said first arm comprising a spring connected to said platform and to said first arm.
  • a second arm which extends along said pole and is pivoted to said platform under said first arm and spaced therefrom, said second arm carrying a third hook opening downwards at its upper end, can be engaged with another crossbar and substantially at the same time with the second hook; and manual control means for releasing said second and third hooks from engagement with said bars to disengage them when said platform is lowered.
  • a second and a third guide member fixed to and projecting upwards from said second and third hooks, respectively, and sliding along the immediately higher transverse bars when said platform is raised to pivot said second and third arm towards the outside of said post and to allow said second and third hooks to release the immediately higher transverse bars.
  • a means of level balancing suspending said balancing stage from said platform, said balancing stage extending at least from one post to another and carrying supports for tie bars accessible to an operator standing on said stage rocking, said rocking stage allowing said operator to install said tie bars diagonally through said two posts and to fix said tie bars to said posts.
  • tie rods are intended to be supported in said supports carried by said rocking stage, said tie rods having means for fixing it to said posts and to an adjacent building wall, to stabilize said posts and said platform along said building wall.
  • a hydraulic supply circuit is connected to said hydraulic cylinders; and level means for controlling said hydraulic supply circuit are provided, said hydraulic supply circuit and said level means being installed on said platform and being accessible to a worker on said platform.
  • modular work platform extensions prefferably connected to said work platform and arranged to conform to the outline of an adjacent building wall in order to allow access therefrom from said work platform.
  • said working platform comprises a bottom frame rigidly rigid with this one and further comprising guide bearings carried in pairs vertically spaced by said working platform and by said bottom frame and in rolling contact with said organs of corner to stabilize said working platform by compared to said posts.
  • said first hook consists at its upper end of a rigid link whose lower end is pivoted at the upper end of said piston rod, transversely to said piston rod, and further comprising a guide rod s 'extending parallel to and spaced from said piston rod and rigidly fixed at its upper end to the upper end of said piston rod; and a guide sleeve is attached to the upper end of said cylinder for slidingly receiving said guide rod.
  • a rigid base 20 consisting of a central beam 22 and two transverse beams of ends 24 from each end of which protrudes down a foot or adjustable leveling disc, 26.
  • four standing tubes 28 are fixed, arranged at the corners of a rectangle.
  • Each group of four tubes 28 are arranged to support and fix an upright post 30.
  • Each post consists of modular post sections, 32.
  • Each post section consists of an open trellis frame having a rectangular section and comprising four members corner and elongated angles, 34, interconnected by inclined fasteners 36 and by transverse fasteners 37 along two opposite faces of each post and by transverse bars 38 along two other opposite faces of each post 30.
  • each post section comprises a projecting plate 39 which can engage in the upper end of the corner members 34 of the immediately lower post section, these plates being anchored in place by transverse pins 40 passing through orifices opposite in the arranged parts, as shown in FIG. 5.
  • Each section of post 32 has such a length and width that it can be easily handled by a single worker, by means of a manual winch if necessary, on a working platform 42 suspended from the two posts. Consequently, the numerous sections of pole 32 can be carried by the working platform 42 and successively installed one above the other while the platform is being lifted and dismantled while the platform is lowered.
  • the working platform 42 is generally rectangular in shape and comprises a main frame 44 directly supporting a floor 46, the frame 44 being reinforced below by a bottom frame 48. As illustrated in Figure 4, the working platform 42 has two openings 50 spaced along the central line of the working platform for the passage of the two posts 30.
  • the frame 44 and the bottom frame 48 are made of two tubular metal members in which platform extension sections, 52, can be removably installed, at various levels, as shown in FIG. 2, and also in FIGS. 2 and 3 in the form of supports for supporting the floor 54 near a building wall 56 which can be arranged to follow the outline of the building wall, as shown in plan section in FIG. 4, so as to allow a worker A to stand near the building wall where to install a covering, for example bricks referenced B, using mortar C.
  • the scaffolding can be installed sufficiently spaced from a building wall 45, so as to completely clear any projecting obstruction such as balconies D and the like.
  • the platform extensions are temporarily removed to clear each balcony as the brick laying work progresses up the wall.
  • balustrade or ramp 58 is removably installed on all three sides of the platform as a safety measure. Part of this balustrade can be used as an opening door, as shown at 60 in Figures 3 and 4, to allow easier loading of the working platform when it is substantially at ground level. If desired, platform extensions can be installed at both ends of the main work platform, 42, to increase the wall section width accessible to workers.
  • a balancing stage 62 extends longitudinally from the working platform 42 under the latter and is suspended there by cables 64.
  • Guard railings 66 are also connected to the cables 64.
  • upright stabilization rods, 68 are fixed to the swinging stage 62 and have a stop at their upper end. They are guided by sliding in sleeves 70 fixed to the working platform 42. The guide rods 68 stabilize laterally and longitudinally the swinging stage 62, and firmly stop the swinging stage at the desired level under the platform 42.
  • This arrangement allows the swinging stage to rest on the base 20 immediately under the working platform 42 when the latter is in the fully lowered position, with its bottom frame 48 resting on the base 20 so that the platform completely lowered and the base can occupy a minimum of height when not used to facilitate their transport from one construction site to another.
  • the swinging stage 62 carries upright posts 72 (FIG. 2) provided with fasteners 74 to support elongated spacers, not shown, to be installed by the worker, who has come down from the working platform on the swinging stage 62, so as to attach the two posts to one another.
  • These attachment bars are successively attached at the required height intervals, while the platform is being lifted, and are similarly detached from the posts when the platform is lowered, and the post sections successively undone.
  • the attachment rods 76 supported by the hooks 64 are installed by the worker to attach the two posts to the building wall 56 while the platform is raised, so to stabilize the posts in the direction towards and outside the building wall.
  • the tie rods 76 are removed, again using the rocking stage to access it. Eyelets 78 have been previously fixed to the wall 56 and a hook 80 is added at one end of the attachment rods 76 for engaging the eyelets 78.
  • the attachment rods 76 are fixed to the posts 30 by rod-joint seals adjustable clip, 81.
  • the working platform 42 is guided along the post 30 by two sets of rollers with guide flange, 82, engaging the angular members 34 at the four corners of each post, a set at the working platform 42, and the other set of flanged rollers 82 being carried by the bottom frame 48 vertically below the first set of rollers, so as to better stabilize the platform transversely there.
  • Figure 7 shows the means for suspending the platform from each post and for raising or lowering the platform along the posts.
  • An arm 84 extends on one side of each post and is pivoted at 86 to the ears 88 fixed to the frame 44 of the platform. job.
  • the upper end of each arm 44 carries a hook member opening downwards, 90, engaged in a removable manner with any of the transverse bars 38 of the pole sections 32 to suspend the platform there.
  • the lower end of each arm 84 includes a side arm 92 to which a tension spring 94 is attached, the other end of which is attached to a post 96 fixed to the platform 42.
  • the spring 94 constantly forces the arm 84 toward the post 30.
  • a guide bar 98 extends upwards from the hook 90, being fixed there.
  • the guide bar 98 releases the next higher bar 38 towards the outside.
  • the guide bar 98 slides along the crossbar or the next higher notch, as shown in Figure 8, so as to release it when the platform rises.
  • the constraint spring 94 automatically forces the arm 84 towards the post, so that its hook 90 will then engage the next upper crossbar, 38.
  • a duplicate arrangement of an arm 84 ′, a pivot 86 ′, ears 88 ′, a hook 90 ′, a side arm 92 ′, a spring tension 94 ′ and a guide bar 98 ′ are installed on the bottom frame 48 vertically below the first anchoring system, so that the two hooks 90, 90 ′ can engage different transverse bars at the same time, as shown in Figure 7.
  • This Figure 7 also shows manual actuating means for remotely pivoting the lower arms 84 ′ outward, so as to release the transverse notches 38 from the two posts during the lowering of the platform.
  • These means comprise a side arm 100 fixed to the lower arm 84 ′ and connected by a seal 102 to an actuating arm 104 pivoted to the working platform 42 in a position accessible to the worker on the platform, to release the hook inferior.
  • the upper hook can be released by pulling out the guide bar 98 when releasing the notch 38 as shown in FIG. 9.
  • the other anchoring member of the pair is shown at 106 in FIG. 7, it is actuated by force; it can extend and retract longitudinally, so as to raise or lower the platform in relation to the posts.
  • the elongable member 106 comprises a double-action hydraulic cylinder 108 pivoted at its lower end 110 to the bottom frame 48 of the working platform and extending upwards thereof through the opening 50 of the work platform.
  • the jack 108 has a piston rod 112 extending upwards from the platform and the upper end of which is pivoted at 114 to the rigid arm 116, the upper end of which is fixed to an opening hook member downwards, 118, similar to the hook 90, and is also provided with an upwardly inclined guide bar, 120, similar to the guide bar 98 and for the same purpose.
  • a hook 122 is fixed to the upper end of the piston rod 112, said hook carrying the pivot 114 and also a guide rod 124 which extends downwards, parallel to the piston rod 112, and which is guided in a sleeve 126 fixed to the upper end of the cylinder of the jack 108.
  • the pivot 110 of the upper end of the jack 108 of the bottom frame 48 is sufficiently spaced from the post 130 so that the center of gravity of the jack and the hook system are always between the pivot 108 and the pole.
  • This therefore constitutes a means of constantly and automatically constraining the hook 118 against the post, so as to cause automatic engagement of the hook 118 with a transverse notch bar 38 when the platform is being lowered or raised.
  • the stroke of the jack 108 is at least slightly more than the vertical spacing between two adjacent notch bars 38 of the post 30; but, in practice, the stroke is a little more than the distance between three notch bars, so as to raise or lower the platform by two notches for a single stroke of the jack 108, thereby speeding up the lowering procedure or uplift.
  • the hook 90 only suspends the working platform.
  • the hook 118 is lifted by the piston rod 112 from its position in dotted lines to a position slightly above the second highest notch bar 38, then after slightly lowered to engage the last mentioned notch. So, following the retraction of the rod piston 112, as shown in Figure 8, the entire platform is raised; the hook 90 releases the next two higher notches ( Figures 8-9) until the piston rod 112 is fully retracted, at which position the hook 90 is slightly higher and releases the adjacent notch bar. Then, the piston rod 112 is slightly extended to substantially lower the platform and force the hook 90 to fully engage the adjacent catch bar 38, as shown in Figure 10. The platform is suspended securely and the cycle is repeated .
  • the platform is lowered again two notches at a time, as shown in FIG. 11.
  • a plate 128 is temporarily suspended from said notches 38 ′ and 38 ⁇ so that the hook 90 engages only the notch 38 ′′′.
  • the lever 104 is actuated to allow the release of the lowest hook, 90 ′.
  • the two lower hooks 90 ′ can be interconnected from one post to the other, so that a single action arm or lever 104 can operate the two lower hooks.
  • the arm 116 of the elongable arrangement, 106 is pivoted at 114 to the piston rod hook 122 to prevent any stress on the piston rod and its movement in the jack 110. As shown in FIG. 10, when the jack does not work, the arm 116 simply remains on the post and when the arm is under tension, the piston rod automatically aligns with said arm.
  • a spiral spring is arranged at the pivot 114 for constantly forcing the arm 116 towards the post 30.
  • the two jacks 108 are connected by a hydraulic circuit, including the tube 130, to a hydraulic pump (not shown) located in a box 132 (FIG. 3) installed on the working platform itself, 42, adjacent to a post. 30. Box 132 also contains an internal combustion engine to drive the hydraulic pump.
  • the hydraulic circuit is controlled by hydraulic valves (not shown) actuated by control levers 134 by the worker standing on the platform.
  • the platform is strong enough and that the hydraulic system is powerful enough to lift a platform, including the required number of workers, the total load of bricks and mortar sufficient for laying bricks for a multi-storey building over a width equivalent to the length of the work platform and even on an extension thereof. If additional building materials are required, a winch system can be installed on the work platform to lift them.
  • the scaffolding is quickly installed and dismantled, and when completely dismantled, occupies a reduced space to facilitate its transport to another construction site.
  • a set of wheels could be installed at 136 at the bottom frame and that a towing device could be installed at 138 at the opposite end, so that the scaffolding can be easily pulled by a trailer truck such as a semi-trailer, the platform being completely lowered to the base 20 and the latter being locked under the platform.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Movable Scaffolding (AREA)
  • Lubricants (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Chairs Characterized By Structure (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Ladders (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
EP89105421A 1988-04-01 1989-03-28 Hydraulisches Gerüst Expired - Lifetime EP0335311B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/177,539 US4809814A (en) 1988-04-01 1988-04-01 Scaffolding
US177539 1988-04-01

Publications (3)

Publication Number Publication Date
EP0335311A2 true EP0335311A2 (de) 1989-10-04
EP0335311A3 EP0335311A3 (en) 1990-12-05
EP0335311B1 EP0335311B1 (de) 1994-06-01

Family

ID=22648993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105421A Expired - Lifetime EP0335311B1 (de) 1988-04-01 1989-03-28 Hydraulisches Gerüst

Country Status (4)

Country Link
US (1) US4809814A (de)
EP (1) EP0335311B1 (de)
AT (1) ATE106491T1 (de)
DE (1) DE68915599T2 (de)

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Also Published As

Publication number Publication date
DE68915599D1 (de) 1994-07-07
US4809814A (en) 1989-03-07
EP0335311B1 (de) 1994-06-01
DE68915599T2 (de) 1994-09-15
EP0335311A3 (en) 1990-12-05
ATE106491T1 (de) 1994-06-15

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