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
  • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
  • E04G3/24—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons
  • E04G3/26—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons specially adapted for working on roofs
• • 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
  • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
  • E04G3/20—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by walls
• • 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
  • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
  • E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
• • 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
  • E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
• • 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
  • E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
  • E04G5/041—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffolds on roof frameworks or on roofs
• • 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
  • E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
  • E04G5/045—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffoldings on profiles, e.g. I or H profiles
• • 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
  • E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
  • E04G5/046—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffoldings on walls
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G1/00—Scaffolds primarily resting on the ground
  • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
  • E04G2001/155—Platforms with an access hatch for getting through from one level to another

Definitions

• the present invention relates to a method of installing a scaffolding suspended from a facade of a building, as well as the system for implementing such a method.
• the present invention aims to eliminate the above drawbacks of the known methods of installing suspended scaffolding.
• the invention proposes a method of installing a scaffolding suspended from a facade of a building: comprising at least one horizontal row of anchoring studs spaced preexisting by construction at the top of the facade and which is characterized in that it consists in successively mounting the different scaffolding elements from the ground by hand by at least one operator remaining on the ground and lifting scaffolding elements assembled by means of a lifting device or 'elevation consisting of the first scaffolding elements hooked by the operator to the corresponding anchor bolts.
• the method consists in mounting the elements of the lifting device to the peaks by means of a disengageable pole from each of these elements attached to the corresponding anchoring peaks. More precisely, this method consists in removably fixing at the end of the pole a pulley jib forming a scaffolding element of the lifting device; manually lifting the pole to present the bracket at a piton of the same row of pitons and hang it on this piton; to remove the pole from this bracket; fixing removably at the end of the pole another pulley jib forming another scaffolding element of the lifting device; to manually raise the pole to present the other bracket at another piton of the row of pitons and hang it on the latter; and remove the pole from that other gallows.
• the method also consists in placing two brackets at right angles, each resting on the ground by a support structure with a supporting leg parallel to the crosspiece of the console and two vertical wheels carried by a transverse bar secured to the leg arranged opposite of the facade, substantially vertically plumbed respectively by the two brackets attached to their respective peaks; to attach one end of a flexible link, such as a cord, wound on the vertical pulley of one of the brackets, to a nozzle extending the cross member of the corresponding console and located on the same side as the two wheels vertical; to attach one end of another flexible link, such as a cord, wound on the vertical pulley of the other bracket, to a nozzle extending the cross member of the other console and located on the same side ⁇ as the two vertical wheels thereof; laying a scaffolding floor on the two horizontal crosspieces of the two brackets; to raise the assembly consisting of the two brackets and the scaffolding floor by simultaneously pulling on the two flexible links of the two brackets so that this assembly moves vertically towards the two brackets by
• the method also consists, after installation of scaffolding fixed to the facade by anchoring studs of the same row, one of which is located near the edge of a dihedron formed by the facade and a second facade, to install a second scaffolding on the second facade by manually hooking, from the installed scaffolding, to the anchoring stud close to the edge and to a second anchoring stud of the second facade also close to the ridge and located at the same level as the first peak, a rigid angle support covering the salient angle formed by the two facades; manually hooking or using the pole a first pulley bracket to an anchor bolt secured to the support at the edge thereof and at the same level as the other anchor bolts; hanging, using a flexible link wound on the pulley of the bracket, a first angle console at right angles to the bracket and whose horizontal cross member located in the same horizontal plane as the cross members of the bracket brackets of the scaffolding already installed, constitutes a bisector of the angle formed by the two facades; attaching a second pulley bracket using the pole to the
• the method also consists in hooking a third pulley bracket using the pole to a third anchoring stud of the second facade situated at the same level as the other anchoring studs; hooking the end of a scaffolding floor to the cross member of a third bracket console located on the ground and which can be lifted by a flexible link wound on the pulley of the third bracket; fixing the opposite end of the scaffolding floor to another flexible link, preferably the one wound on the pulley of the second bracket; lifting the assembly consisting of the scaffolding floor and the third console by two people, one on the ground and the other on the two scaffolding angle floors, maneuvering the two flexible links so as to hang the third console to the third anchor bolt and to be installed by hooking the opposite end of the scaffolding floor to the cross member of the second console.
• the second and third brackets can each be removed from their respective anchoring pins to be reused later when installing another scaffolding floor as an extension of the previous one or when installing another scaffolding.
• the dismantling of the scaffolding elements is carried out from the ground by simultaneously pulling on the two links to disengage the two brackets from the respective anchoring elements of the two brackets; going down to the ground using the links on the two consoles and then picking up the gallows of their respective anchor bolts using the pole.
• the method consists in hooking the upper part of a mast remaining vertically in place of the lifting device to an anchoring pin, the mast comprising a return pulley at its upper part and a crank winch at its bottom; hook the upper part of another mast remaining vertically in place of the lifting device to another anchoring peg in the same row and also comprising a deflection pulley at its upper part and a crank winch at its lower part; hook a square bracket to a sliding anchor of a mast connected to the end of the sling of the corresponding winch so that the cross member of the console is perpendicular to the front wall and its upright is supported on the front wall by two vertical wheels carried by a lower support structure of the console; hook another angle bracket to a sliding anchor of the other mast connected to the end of the sling of the other winch so that the cross member of the other console is perpendicular to the front wall and its amount is supported on this wall by two vertical wheels carried by a lower support structure of the other console;
• the dismantling of the above scaffolding elements is carried out by maneuvering the two winches to lower the scaffolding floor and the two consoles to a predetermined height close to the ground at which the scaffolding floor can be removed from the two consoles and the latter are then disengaged from the respective sliding anchoring elements of the two masts which are then successively disengaged manually from their anchor bolts.
• the method also consists, from the first scaffolding floor mounted on the two brackets fixed to the facade, to hook the end of a rail to an anchoring stud of the above-mentioned row remote from the floor; fix the opposite end of the rail to the upper part of the amount of the corresponding bracket or of the corresponding mast so that the rail is substantially horizontal; hooking a third angled console with horizontal lower wheels to an anchoring element, which is movably mounted on the rail so as to slide along it, by means of an end piece extending the cross member of the console and located on the same side as the horizontal wheels thereof so that the wheels are supported on the wall of the facade; hang the end of another scaffolding floor on the horizontal crosspiece of the third console; push the scaffolding floor so as to move the console along the rail to a position where the other end of the scaffolding floor can be laid and hung on the corresponding support console of the first scaffolding floor so that the two floors are an extension of each other.
• the dismantling, from the first scaffolding floor, of the support scaffolding elements of the other scaffolding floor is carried out by disengaging by lifting the end of this other floor from the support console of the first floor d 'scaffolding; pulling on the other floor to move the third console along the rail towards the first floor to a position at which the other floor can be disengaged from the third console and placed on the first floor; disengaging the third console from the sliding anchor of the rail to place it on the first floor; and disengaging the end of the rail from the anchor bolt to place it on the first floor.
• two railing posts are mounted on the two ends of the two crosspieces of the two consoles and, after having lowered the scaffolding floor from its height close to the ground during the dismantling operation, the two guardrail posts are removed from these two consoles.
• the method also consists, from at least one scaffolding floor mounted at a predetermined height on two support brackets fixed to the facade of the building, to hang on an anchor bolt secured to at least one roofing element of the building by projecting from the outside thereof, the end part in the form of a housing for hooking an end piece removably fixed to the end of a pole or of an upright of a roof ladder and to which is fixed, by means of a carabiner, a flexible link, such as a rope, so as to allow a person to ensure, to access the roof, using this link, fixed, preferably a harness worn by the person.
• the method further comprises hanging on each console fixed at a predetermined support height of an upper scaffolding floor two elongated flexible suspension elements, such as ropes, straps or cables, descending approximately to the ground in a plane substantially perpendicular to the front wall; and to hang scaffolding floors and railings from the ground and successively between two pairs of suspension elements respectively from two adjacent consoles for supporting the upper floor.
• two elongated flexible suspension elements such as ropes, straps or cables
• the invention also provides a system for implementing the method of installing a scaffolding suspended from a facade of a building comprising a horizontal row of anchoring studs spaced apart already existing by construction at the top of the facade and which is characterized in that it comprises a lifting or lifting device consisting of the first scaffolding elements hooked by hand to the anchoring pins of the row, from the ground, by at least one operator remaining on the ground and allowing the operator to lift scaffolding elements assembled at a determined height of use.
• the lifting device comprises two pulley jibs fixed by hooking respectively to two anchoring studs of the aforementioned row and each comprising an upright provided at its upper part with a back hooking box in which engages by interlocking one of the two attachment pins and at its lower part at least one dorsal support foot on the front wall to keep the upright substantially vertical, and a pulley support crosspiece, the axis of rotation is perpendicular to the upright.
• each pulley jib further comprises at its lower part a portion of front tube adapted to engage removably at the end of a pole maneuvered by one operator to hook the pulley jib to the corresponding anchoring pin via the attachment box and at its upper part, below the cross member, an anchoring element for a support console for a scaffolding floor constituting scaffolding elements, the two consoles and the floor being lifted simultaneously by two flexible links, such as ropes, wound respectively on the two pulleys of the brackets.
• each pulley jib also comprises, in the upper part thereof, at least one U-shaped lateral part extending perpendicular to the cross member of the jib and intended to receive an end portion of a rail allowing the mounting a scaffolding floor as an extension of that carried by two brackets respectively attached to the two anchoring elements of the two brackets.
• each pulley jib further comprises a part disposed between the cross member and the anchoring element and arranged to guide the hooking by fitting of a tip of the support console on the anchoring element.
• the back block for attaching the pulley bracket comprises two side plates extending from the opening of the housing towards the lower part of the bracket post and moving away from one another to guide the introduction of the piton d anchoring in the hanging box.
• each pulley jib is U-shaped, the branches of which are fixed to the upright and an axis is fixed transversely between the branches of the U of the cross member, opposite the post of the jib and the pulley, the l the axis of rotation is fixed between its branches perpendicular to them, so that the link passes vertically between the pulley and the axis when lifting the brackets and the scaffolding floor or from the pulley passing over it axis to descend vertically during the lifting operation of the corresponding console from its bracket during the dismantling of the scaffolding elements.
• the lifting device comprises two masts fixed vertically by hooking their upper parts respectively to two anchoring pins of the same row, each mast comprising at its upper part a back box d hooking to lateral guide plates in which one of the two anchoring studs engages by interlocking as well as a deflection pulley and at its lower part at least one dorsal support foot on the front wall as well as a crank winch, the winch sling passing over the deflecting roller having its end connected to a movable member slidably mounted along the mast and cons' titué preferably by a square section sleeve closely surrounding the mast, the movable member carrying at its front part an anchoring element of a support console for a scaffolding floor and at one of its side walls a ratchet and return spring assembly for blocking the movable member to the mast at a predetermined height.
• Each mast comprises at least three elements, a central element of great length on which the movable member is slidably mounted and the lower part of which comprises the support foot and two shorter end elements slidably mounted telescopically. respectively in the two upper and lower end parts of the central element, each end element being fixed relative to the central element in an adjustable position for example by an axis or a fixing bolt and the crank winch is fixed to the lower end element of the mast while the return pulley is fixed to the upper end element of this mast, the sling starting from the winch passing over another return pulley fixed to the element d lower end and passing through the lower end element, the central element and the upper end element of the mast to hook onto the mo bile.
• the two support consoles of a scaffolding floor intended to be hung by the operator respectively to the two anchoring elements of the two brackets or of the two movable members of the two masts are each in the form of a square, the lower part of which of the upright is fixed to a rolling support comprising a support leg located under the cross member of the console parallel to the latter and a bar fixed transversely to the end of the leg on the side of the upright opposite to that comprising the cross member and bearing two vertical support and bearing wheels for the console on the front wall.
• Each console includes an end piece extending the crosspiece from the upright and ending in a part in the form of a hanging box in which the anchoring element of a pulley jib or of a movable member can be removably engaged. of the mast, the end piece and the support bar of the vertical wheels projecting from the console upright by a distance allowing the crosspiece of this console to be maintained in a horizontal position and perpendicular to the front wall when the console is hung on the anchor of the bracket itself hooked to the corresponding anchoring stud or to the anchoring element of the movable member of the mast fixed to the front wall, with the vertical wheels resting thereon.
• Each end piece of a console is slidably housed in a tube-shaped part of the cross member of the console and is fixed in this part at a position determined by a through pin, the end piece comprising a means for fixing the end of one of the flexible links passing over the pulley of the bracket and the opposite end of which can be pulled to raise the console, the fixing means preferably being constituted by one of the holes in the end piece through which passes the end of the link retained at this tip by a knot formed at this end.
• a railing post is fixed to the crossmember of each console by its lower end part passing through a hole made in the end part of the crossmember.
• the scaffolding floor is fixed on two consoles resting on the ground or mounted on the two masts by two pairs of rigid hooks respectively secured to the two ends of the floor, each pair of hooks being supported on the cross member of the corresponding console.
• each scaffolding floor can be of the telescopic type and comprises, if necessary, a flap-like opening of the hatch type.
• each mast or its movable member preferably comprises at its upper part a lateral U-shaped piece extending transversely to the plane of the console and intended to receive an end portion of a rail allowing the mounting of a scaffolding floor as an extension of that carried by the two brackets fixed to the masts.
• Each rail used in one or the other of the two embodiments above is in the form of a hollow tube with rectangular cross section split on one side, the side walls on either side of the slot of the tube constituting raceways of a carriage internal to the tube and supporting outside the tube an element for anchoring the attachment housing of the end piece of a third console so as to allow the latter to slide at a position allowing the support of another scaffolding floor in extension of the scaffolding floor supported by two consoles in the high position of use, each rail comprising a back attachment box for fixing the end of the rail, opposite to that maintained on the U-shaped side piece of the corresponding bracket or of the corresponding mast, to a front anchoring stud distant from that supporting the bracket or the mast.
• Each rail further comprises a bar forming a rail maneuvering pole fixed at one of its ends to the rail in the same plane as the latter and having an intermediate part fixed to the rail by a bracket so that the bar is inclined towards the top above the rail from the end of the bar attached to the rail.
• the third console is of a structure generally identical to the other aforementioned consoles and has its lower transverse bar carrying at its ends two horizontal wheels for supporting and rolling the console along the front wall.
• a device forming a tip in the general form of a rigid rigid bar which can be removably fixed to the end of a pole comprises at its free end a hooking box intended to receive a fixed anchor bolt secured to a part of roof of the building, a tube fixed at its opposite end making it possible to removably couple the end-piece to the tubular end part of the pole or of one of the uprights of a roof ladder and a part in the shape of a loop fixed in the vicinity of the coupling tube and allowing to hang, via a carabiner, a flexible link, such as a rope, also connected to a harness of a person to allow him to make sure to climb on the roof from a scaffolding floor in the position of use on its respective consoles, the attachment box preferably comprising at its opening for passage of the anchor bolt, two divergent side plates guiding the fitting of the housing hooking on the hooking bolt.
• At least two anchors of the roof of the building accessible from the outside, located on the two ramps of the roof perpendicular to these, are fixed in the vicinity of the two ends of two arms mounted articulated in the manner of a compass on the roof ridge failure, each arm being fixed between two successive rafters by means of a flat bar secured to the arm transversely to the latter and fixed to the two rafters by fixing screws.
• Each support arm of an anchor bolt comprises two telescopic tubes, the internal tube of which has at its free end a sleeve situated in the longitudinal median plane of the internal tube perpendicular to it and in which is fixed in relative position and selectively adjustable the anchoring bolt and whose outer tube is pivotally mounted on an axis parallel to the ridge purlin, the two free ends of the pivot axis of the two outer tubes of the two articulated arms being engaged respectively in two vertical oblong holes each made in the vertical branch of a square support piece whose horizontal branch is fixed on the upper side of the ridge purlin, the internal tube of each arm being fixed relative to the external tube, in a selectively adjustable position, for example by an axis or a bolt passing through the two tubes.
• At least one anchor bolt on the roof of the building accessible from the outside and located on the roof slope perpendicular to it, is fixed to a common breakdown of the wooden frame by means of the two perpendicular telescopic tubes.
• the purlin and whose inner tube carries at its free end the anchor bolt and the outer tube is fixed to the current purlin at least by a rigid lower plate parallel to the purlin secured to the outer tube at the base thereof , the inner tube being fixed relative to the outer tube at a selectively adjustable position for example by an axis or a bolt passing through the two tubes.
• the external tube is also fixed to the current purlin by a rigid upper plate integral with a sheath mounted on the free end portion of the external tube opposite the piton " and perpendicular to this tube, the upper plate being fixed to the current purl by two angled rods, one of the branches of each rod perpendicular to the outer tube having a threaded part crossing the corresponding end of the upper plate while the other branch of the angled rod parallel to the hollow tube and passing under the current purlin having at its end a pointed boss penetrating into the current purlin when two nuts screwed respectively on the two threaded parts of the corresponding branches are locked on the upper plate.
• At least one anchor bolt on the roof of the building accessible from the outside and located in the slope of the roof perpendicularly to it, is fixed to a metal I-shaped purlin of a metal frame of the roof via of two telescopic tubes, the internal tube of which carries the anchor bolt at its free end and the external tube is fixed on two parts of the upper edges of the fins facing the purlin perpendicularly to these by two pairs of tie rods located on either side of the fins and having at their ends opposite the outer tube hooked parts anchored on the lower edges of corresponding fins.
• the tie rods of one pair have their threaded parts passing through a rigid plate fixed on the outer tube near the opening for passage of the inner tube in the outer tube and the tie rods of the other pair have their threaded parts passing through two tubes respectively.
• Each anchoring peg of the roof is covered by a cat flap " through which the attachment box of the end-piece device can engage to hang it on the anchoring peg and the so-called ventilation side of the cat flap is closed by a tilting grid or flexible combs.
• the pole used in particular to hang each pulley jib in particular on an anchor bolt is telescopic and comprises at least three U-profiles fitted into each other, the displacement of the profile of smaller section relative to the profile of medium section being controlled by a first means independent of a second means controlling the displacement of the profile of medium section relative to the profile of larger section, the first means comprising a flexible link, such as a rope, wound to a return pulley fixed to an axis fixed transversely between the two fins of the medium-section profile at the passage end of the profile with the smallest section and one end of which is fixed to an axis fixed transversely between the two fins of the profile with the smallest section at the opposite the free end of the section of smaller section which has an end tube to
• the telescopic pole also comprises first and second pawls making it possible to respectively block the profile of smaller section relative to the profile of medium section and the profile of medium section relative to the profile of larger section, the first pawl being pivotally mounted on an axis fixed transversely between the two fins of the medium-section profile in the vicinity of the pulley of the first control means and returned by a spring in a tilted position so that one of the transverse bars secured to the bottom of the profile smaller section comes into abutment, by gravity, against the first pawl to retain the section of smaller section at a determined relative position, while the second pawl is pivotally mounted on an axis fixed transversely between the fins of the section of larger section in the vicinity of the return pulley of the second control means and returned by a spring to a tilted position so that one of the transverse bars integral with the fins of the profile of medium section comes into abutment, by gravity, against the second pawl for retain the mid-section profile at a determined relative position,
• At least one of the front anchoring studs is fixed to a ring secured to the front wall by means of an anchoring hook secured to the stud which includes a screw for holding the stud in the housing d '' a pulley jib bearing on the post of the jib.
• At least one of the front anchoring studs is fixed to a horizontal axis integral with the facade wall by means of an element comprising a hook-shaped part secured to the stud which comprises a retaining screw - of the stud in the housing of a pulley jib bearing on the amount of the jib and a ring-shaped part fixed removably to the stud by an axis.
• the pulley jib intended to be attached to the corresponding anchoring stud comprises two adjustable stabilizing support feet constituted by two through screws a rigid plate integral with the amount of the bracket transverse thereto, the free end of each screw comprising a bearing portion in the form of a cup.
• At least one of the front anchoring studs is mounted sliding in a retractable manner in an assembly comprising a tube, preferably of rectangular section, in which a sliding part of the anchoring stud can slide and intended to be held between two building blocks of the facade wall being fixed between them by a joint cement of the two blocks, and a part forming a casing integral with one end of the tube, in which the active part of the anchor bolt is housed, and at least part of which can be embedded in an external covering such as a plaster of the front wall, the box comprising at its front part external to the wall a drawer in the form of a plate for closing the box which can slide in a captive manner at a open position to authorize the exit, for example by traction, of the active part of the anchor bolt outside, the slider part of the anchor pin integral with its part a ctive comprising an oblong hole crossed by an axis integral with the guide tube, which comprises a plate at its end opposite to the housing part and bearing on two parts of adjacent vertical faces of the two building blocks.
• At least one of the front anchoring studs is mounted sliding in a retractable manner in a generally parallelepipedal box embedded in concrete and comprising on its upper wall a vertical rigid plate crossed by a screw parallel to the longitudinal axis of the housing and making it possible to hold the housing between two parallel walls of a formwork into which the concrete is then poured, the opening of the housing opposite the retaining screw being closed, during the pouring of the concrete, by a cover bearing against the corresponding wall of the formwork and removed after sealing the housing in concrete so as to removably fix in the opening of the embedded housing a second external housing with drawer in the form of a closing plate which can slide captively in the open position to allow the exit, for example by traction, of the anchoring bolt, the slider part in the form of a plate sliding in a sliding rectangular section in the form of a tube fixed in the embedded housing, comprises an oblong hole crossed by an axis integral with the housing.
• the wall of the aforementioned housing comprises an external, self-adhesive or magnetic plate, fixed removably to this wall and allowing the positioning of the housing on the internal wall of the metal formwork before closing it.
• At least one of the front anchoring studs is retractably mounted to tilt in a box of parallelepipedal shape embedded in concrete of the front wall and comprising at its rear wall opposite to its opening for tilting the anchoring stud, a square piece for sealing the housing in the concrete, this piece carrying a vertical rigid plate crossed by a screw for holding the housing between two parallel walls of a concrete pouring formwork and perpendicular to the upright of the square piece so to come into forced abutment on one of these two walls, the opening of the casing being closed during the pouring of the concrete by a cover in abutment against the other wall and which is removed after sealing the casing in the concrete so as to fix removably in the opening of the submerged case another external case closable by a drawer in the form of a sliding plate captive in an open position at the watercolors the anchor tilted by gravity in the position of use substantially perpendicular to the plane of the " opening of the removable housing and is held in this position by a stop integral with the piton and bearing on
• Two support consoles for a scaffolding floor each support two flexible long vertical elements, such as ropes, straps or cables extending to the ground, located in a plane substantially perpendicular to the front wall and comprising the along these and opposite loops rigidly fixed to the elements and in which U-shaped fasteners are removably supported two by two a bar arranged between the two elements perpendicular to them and serving as a support ends of a scaffolding floor, the floors being successively mounted by hand on the bars between two successive pairs of elements from the ground to below the two support consoles of the upper scaffolding floor.
• two flexible long vertical elements such as ropes, straps or cables extending to the ground
• Each attachment box for a pulley jib, a support console for a scaffolding floor or a rail has on its wall opposite a corresponding anchor bolt a vertical slot and the anchoring stud at its active end in the form of a tee perpendicular to the front wall and engaging in said attachment housing with the leg of the tee, constituted by a rigid vertical plate, engaging in the slot so that the head of the tee, also in the form of a rigid vertical plate, retains the attachment box.
• a notch is made in the upper part of the leg of the anchor tee and adjacent to the head of the latter so that the end of the slot of the attachment housing comes to bear at the bottom of the notch .
• the aforementioned angle support comprises two rigid plates forming a dihedral respectively comprising two elongated slots parallel to the common edge of the two plates and open at one of their ends and through which the two legs of the two peaks can engage respectively for anchoring the two facades, the projecting angle of which has substantially the same value as the dihedral angle of the two plates of the angle support.
• Each corner support plate comprises two parts assembled to one another by bolts passing through oblong holes in the two parts and perpendicular to the aforementioned common edge to allow adjustment of the relative position of the two parts.
• Each reusable pulley bracket includes a flat bar-shaped upright comprising a lateral cutout configured so as to allow the bracket to be hooked to an anchoring stud and the manual removal of the stem from this stud after hooking a console. to the anchor bolt by means of an attachment box secured to the console; a pulley support cross member fixed in the upper part of the upright; and an intermediate piece fixed transversely to the upright and arranged so as to guide the attachment of the console housing to the anchoring pin.
• the angled corner console comprises in the lower part of the upright two wheels parallel to the upright and situated respectively in two dihedral planes so as to move along the two facades in obtuse angle and in the upper part of the upright a hanging box to an element forming the piton of a pulley jib and a return pulley of the flexible link to allow the lifting of the console to its position for hooking to the jib or the disassembly of the console from the jib and the descent of the latter here on the ground.
• the system may advantageously also include at least one railing post, the lower end of which is fixed to one leg of a T-shaped bar, the other part of which is formed by a bar transverse to the post and carrying two wheels parallel to the latter and which further comprises an end piece fixed to the post and supporting at its end a housing for hanging the post by a reusable pulley jib, to a peg anchoring a facade, the end piece comprising a means, such as a transverse axis, for hooking the end of a flexible operating link, such as a rope, so as to allow the railing post to be raised by pulling on the flexible link passing over the pulley of the stem and hang the post housing on the anchor bolt.
• the scaffolding floor is fixed at its two ends respectively on two crosspieces of two brackets at right angles by means of articulation axes allowing the pivoting of each console at right angles between an inactive fully folded position under the scaffolding floor and an active position perpendicular to the scaffolding floor to which the floor can be lifted from the ground to hang it on the wall of a facade.
• the scaffolding floor of this embodiment comprises three railing barriers respectively a longitudinal barrier and two lateral barriers, pivotally mounted with respect to each other on the floor so as to occupy a stowed folded position on the floor or an active deployed protective position, each side barrier may include two parts mounted to slide telescopically into one another.
• the system can comprise at least a second scaffolding floor making it possible to extend a first scaffolding floor previously posed on two square brackets fixed to the wall of the facade and whose end opposite to the first floor is fixed, for example by hooks, to a third angled console fixed to the wall of the facade, the second scaffolding floor having a length such that its end portion close to the first floor rests directly on the latter so as to take into account the differences in distance separating successive anchoring pins of the same row.
• the second scaffolding floor is advantageously made from a sheet of rectangular sheet metal whose two longitudinal edges and the edge of the end to be fixed to the third column are folded down to form stiffening fins.
• the aforementioned end edge of the sheet metal sheet is folded 90 ° under the sheet and the aforementioned longitudinal edges are folded on each side at 90 ° under the sheet over a part of its length and at 90 ° beyond above the leaf over the remaining length.
• FIG. 1 shows in perspective certain scaffolding elements of the scaffolding system of the first embodiment of the invention and intended to be fixed to pre-existing anchoring studs on a front wall of a building.
• Figure 2 is a perspective view similar to that of Figure 1 showing other scaffolding elements assembled before mounting all of these elements constituting the scaffolding at a predetermined height of the facade.
• Figure 3 is a perspective view showing the elevation of the scaffolding approximately to its position of use at the top of the facade.
• Figure 4 is an enlarged perspective view of one side of the scaffolding showing a console thereof anchored to the corresponding anchoring stud of the front wall.
• Figure 5 is an exploded perspective view of a first alternative embodiment of a pulley jib allowing the attachment of a scaffolding console to the corresponding anchoring stud of the front wall.
• Figure 6 is a rear view along arrow VI of Figure 5 of the upper part of the pulley jib.
• Figure 7 is a rear view along arrow VII of the attachment housing of a scaffolding console.
• Figure 8 is a perspective view of a second alternative embodiment of the pulley jib.
• Figure 9 is a perspective view of a third alternative embodiment of the pulley jib.
• Figure 10 is a partial perspective view showing in detail a scaffolding console.
• FIGS. 11A to 11E show in perspective different embodiments of anchoring studs to be fixed to corresponding supports.
• Figure 12 is a perspective view of a scaffold of the first embodiment mounted in the use position and from which can be mounted a second scaffold.
• Figure 13 is a detailed perspective view of a rail used for mounting the second scaffolding.
• FIG. 14 shows in perspective the anchoring of one end of the rail from the first scaffolding.
• FIG. 15 represents the anchoring of the other end of the rail to a pulley jib of the first scaffolding.
• FIG. 16 represents the anchoring of a third scaffolding console to a mobile element with an anchoring pin of the support rail.
• FIG. 17 represents the displacement of the third scaffolding console to its position of use remote from the first scaffolding using the scaffolding floor of the second scaffolding.
• FIG. 18 represents the second scaffolding in the mounted position with its scaffolding floor in extension of the scaffolding floor of the first scaffolding.
• Figure 19 is an enlarged view of the lower end portion of the third scaffolding console.
• Figure 20 shows in perspective a second embodiment of the scaffolding system of the invention with two vertical masts already fixed by their respective anchor bolts to the front wall.
• FIG. 21 is a perspective view showing scaffolding elements with brackets and floor mounted on the two scaffolding masts of FIG. 20.
• FIG. 22 is an enlarged perspective view of a scaffolding console mounted on one of the scaffolding masts of FIG. 20.
• FIG. 23 is an exploded perspective view of a device forming an end piece with an attachment box intended to be anchored to an anchoring stud of a roof of a building.
• FIG. 24 shows in perspective a first alternative embodiment of a device for fixing two anchoring pegs to a ridge fault of a wooden frame of a building.
• FIG. 25 is a sectional view in a vertical plane containing the line XXV-XXV of FIG. 24.
• Figure 26 is a partial perspective view showing a second alternative embodiment of a device for fixing an anchoring stud to the wooden frame of a building roof.
• Figure 27 shows in perspective an example of a cat flap intended to cover the anchoring pin of Figure 25 or Figure 26.
• Figure 28 is a perspective view of a third alternative embodiment of a device fixing an anchor bolt to a common breakdown of a wooden frame of a building roof.
• Figure 29 is a perspective view of a fourth alternative embodiment of a device for fixing an anchor bolt to a metal breakdown of a metal frame of a building roof.
• Figure 30 is a perspective view of a telescopically retractable anchor bolt in a device, part of which is sealed in a wall made of building blocks.
• Figure 31 is a perspective view of an anchor bolt pivotally mounted in a support housing, part of which is sealed in concrete.
• Figure 32 shows the housing part of Figure 31 held in position between two parallel walls of a formwork before pouring concrete into it to seal this housing.
• FIG. 33 is a perspective view of an anchor bolt mounted telescopically retractable in a support box, part of which is sealed in concrete in the manner of the box in FIGS. 31 and 32.
• FIG. 34 is a perspective view of an anchoring stud shaped so as to be fixed to a ring part sealed in a front wall.
• Figure 35 is a perspective view of an anchor stud shaped so as to be fixed to a horizontal bar fixed in a cavity of a front wall.
• Figure 36 is a perspective view of a telescopic pole according to the invention.
• FIG. 37 is an enlarged detailed view of the part circled in XXXVI of FIG. 36.
• FIG. 38 is an enlarged detailed view of the part circled in XXXVIII of FIG. 36.
• Figure 39 is a front view of a wall gable of a building on which are mounted a number of scaffolds of the invention below which are raised from the ground to these scaffolds of other parallel floors of scaffolding.
• Figure 40 is a side view along the arrow XL-XL in Figure 39.
• Figure 41 is an enlarged perspective view of a scaffolding console under which are fixed two vertical straps for supporting a scaffolding floor located below the scaffolding floor supported by the console.
• Figure 42 is a perspective front view showing two walls of a building forming between them a dihedral angle, preferably 90 °.
• Figure 43 is a perspective view of a scaffolding installed at one of the facades of Figure 42 to allow the installation at an angle of another scaffolding to the other facade.
• FIG. 44 is an enlarged perspective view of a part situated at the corner of the facades of FIG. 43.
• Figure 45 is an enlarged perspective view of a corner support to allow installation of the scaffolding to the other facade.
• Figure 46 is a perspective view of the corner support of Figure 45 fixed to the angle of the two facades.
• Figure 47 is a perspective view similar to that of Figure 46 with the presence of a corner bracket and a flexible link, such as a rope, for installing a corner console.
• Figure 48 is a perspective view showing in particular the corner console in the installation position.
• Figure 49 is a view similar to that of Figure
• Figure 50 is a view similar to that of Figure
• Figure 51 is a view similar to that of Figure
• Figure 52 is a perspective view showing the installation of a scaffolding floor on the other facade.
• Figure 53 is an enlarged perspective view showing another embodiment of a bracket disposed at the end of a pole before being anchored to the peak of a facade.
• Figure 54 shows the bracket of Figure 53 attached to a peg anchoring a facade.
• Figure 55 shows in perspective a railing post according to the invention.
• Figure 56 is a perspective view of two railing posts of Figure 55 attached to two anchoring studs on a facade.
• FIG. 61 is a perspective view of scaffolding floors allowing the installation of scaffolding to anchor pegs which can be spaced from each other at different distances.
• the installation system of a suspended scaffolding of the invention comprises a number of different scaffolding elements successively mounted from the ground by hand by at least an operator remaining on the ground and lifting scaffolding elements assembled by means of a lifting device constituted by first scaffolding elements hooked by the operator to the corresponding anchoring studs 1.
• the pulley bracket 2 comprises an upright 4 in shape of a metallic flat bar at the lower end of which is fixed, for example by welding, a tubular portion 5 whose longitudinal axis is parallel to the upright 4 and intended to engage with play in the tubular upper end 3a of the pole 3 until the lower end of the upright 4 abuts on part of the peripheral rim of the upper end of the tube 3a.
• the tubular portion 5 is fixed to the front face of the upright 4, the opposite dorsal face of which comprises a foot 6 bearing on the front wall M in the anchoring position of the bracket 2 to the corresponding anchoring stud 1.
• the support leg 6 is in this case constituted by a portion of L-shaped angle iron whose branch perpendicular to the upright 4 is fixed thereto, for example by welding, and the other branch parallel to the upright 4 is supported on the front wall.
• the lower end of the upright 4 of a bracket 2 also comprises a short length chain 7, one end of which is fixed to a fixing U, the branches of which are fixed by welding to the front face of the upright 4, the other end of the chain 7 comprising a pin 8 allowing the tubular portion 5 to be fixed in the tubular end 3a of the pole 3 by engaging the pin 8 in diametrically opposite bores and opposite the tubular portion 5 and the 'tubular end 3a.
• Such attachment may be necessary, for example when transporting the pole 3 with the bracket 2 to the mounting site or when the pole 3 is left in place on the bracket 2 during the scaffolding lifting operations, the pin 8 then being removed before raising the bracket 2 towards the corresponding anchor bolt 1 in the first case.
• the pulley jib 2 has its cross member 9 supporting the pulley 10 formed by a stirrup, the two branches 9a, 9b of which are fixed to the front face of the upper part of the upright 4 by welding.
• the pulley 10 is mounted on an axis of rotation 11 fixed between the two branches 9a, 9b of the crosspiece 9 perpendicularly to the latter and maintained at these removably by an external pin 12, of the genus "Mécanindus", the two branches 9a, 9b now of course laterally holding the pulley 10.
• a cylindrical axis 13 is also removably fixed between the two branches 9a, 9b of the cross member 9 perpendicularly to these and opposite the upright 4 and the pulley 10.
• the axis 13 is held between these two branches by an external pin 14.
• the role of the axis 13 is firstly to maintain the link flexible 15, such as a rope, wound on the pulley 10 during the elevation of assembled scaffolding elements as will be seen later and on the other hand to unhook the bracket 2 from the anchor bolt 1 during the disassembly of the scaffolding by passing the flexible link 15 of the pulley 10 around the axis 13 so that the flexible link 15 passes between this axis and the end of the stirrup of the cross member 9 opposite the upright 4.
• the upper part of the bracket 2 further comprises an attachment box 16 of generally parallelepipedal shape fixed, for example by welding, to the dorsal face of the upright 4 at the top of the latter.
• This housing has at its wall opposite to that fixed to the upright 4 a slot 17 parallel to the upright 4 starting from the corresponding edge of the lower opening 18 of the housing 16 to below its upper closing wall.
• the housing 16 is dimensioned so as to receive therein the active end of the anchor bolt 1 which has the shape of a tee whose head la consists of an approximately square plate and the leg 1b by a rectangular plate fixed to the head perpendicularly thereto and ending with a plate fixing it to the front wall so that when the stud 1 is fixed to this wall, the leg 1b is located in a vertical plane perpendicular to the wall and the head is located in a vertical plane parallel to this wall.
• the leg lb of the anchor bolt 1 comprises a notch or notch ld of rectangular shape made in the upper part of the leg lb just behind the head the.
• the housing 16 also comprises two plates 19 secured respectively to the two side walls of the housing 16 parallel to the longitudinal axis of the upright 4.
• the two plates 19 start from the corresponding peripheral edge portion of the opening 18 by deviating or diverging from one another towards the lower end of the upright 4, that is to say opposite the cross member 9, and serve of means for guiding the housing 16 to hang it on the anchoring stud 1 by covering the head 1a of this stud during the attachment phase.
• the bracket 2 further comprises an anchoring peg 20, of identical structure to the front peg ld, apart from the absence of the plate le of the peg ld, and whose leg 20b is fixed to the front face of the upright 4 perpendicularly to this, for example by welding, at a suitable location below the cross-member 9.
• the anchoring stud 20 is intended to fix a hooking box 21 of a scaffolding console 22 as will be seen later the housing 21, open at both ends s û s lower and upper, comprising, as the housing 16, a slot 23 formed in the front wall of the housing 21 extending vertically from the corresponding portion of the peripheral edge delimiting the opening bottom of the housing 21 to the upper part thereof.
• the housing 21 has in cross section the shape of a U whose ends of the branches are folded substantially at 90 ° to be fixed, for example by welding, to the rear or back part of a rectangular plate 24 integral with the end of a nozzle 25 in the form of a hollow tube of square section fixed telescopically to a chosen position in a corresponding hollow tube of a crosspiece 26 of the console 22 as will be explained in more detail later.
• the housing 16 when the housing 21 is fixed to the anchor bolt 20 so that the head 20a thereof is engaged in the housing 21 with the leg 20b engaged in the slot 23 of the housing 21, the end upper part of the slot 23 bears on the bottom of the notch 20d of the peg 20.
• the part 27 is constituted by an element 27a generally in the shape of a U whose intermediate branch connecting the two lateral branches is fixed perpendicular to the upright 4 by means of a fixing foot 27b fixed to this upright, for example by welding, and the two lateral branches 27c are flared from bottom to top relative to the upright 4 to ensure the guiding the attachment box 21 on the anchor bolt 20.
• the anchoring studs 1 have the common characteristic of the tee shape of their end and it is understood that many possibilities of fixing each stud to the front wall may exist as will be seen later, FIG. 5 representing a variant of embodiment according to which the stud 1 is fixed in the front wall by fixing screws 28 passing through the console and fixed in the wall.
• the two brackets 2 when fixed respectively to two anchoring studs 1, constitute the first scaffolding elements making a device for lifting the other scaffolding elements.
• Each console 22 in square shape, includes cross 26 fixed to the upright 30 and connected to each other by a diagonal reinforcement leg 31.
• the assembly constituted by the cross member 26, the upright 30 and the reinforcement leg 31 is supported by a bearing and bearing structure constituted by a leg 32 bearing on the ground located under the cross member 26 parallel to the latter in the same plane as the cross member 26, the lower end of the reinforcement leg 31 being fixed on the leg 32, and a bar 33 carrying at its two ends respectively two vertical wheels 34 being secured to the end of the support leg 32 opposite to that supported on the ground and transverse thereto.
• the wheel support bar 33 protrudes beyond the upright 30 by a distance substantially identical to that on which protrudes the end piece 25 and the attachment housing 21 telescopically fixed in the end also protruding from to the upright 30 of the cross member 26, so that in the mounted position of the console 22 on the corresponding bracket 2, the wheels 34 are supported on the front wall M to maintain the cross member 26 in a substantially horizontal position.
• the cross member 26 is in the form of a hollow tube of square section whose projecting end of the upright 30 telescopically receives the end piece 25 which is fixed in a relative projecting position by a pin 35 passing through the end piece 25 and the end of the cross member 26 and connected in a captive manner to the console 22 by a chain 36 fixed at an appropriate location on the cross-piece 26.
• each end piece 25 of a console 22 has a certain number of vertical holes 25a accessible from the outside in a fixed position of the end-piece 25 relative to the cross-member 26 and allowing for one of them the passage " from the end of the flexible link 15 so as to hang it on the end piece 25, for example by means of a node 15a produced at the free end of the link 15 under the end piece 25 as is better visible in FIG. 10.
• the reinforcement leg 31 is a tube square cross-section hollow and its end portion lower fixed to the support leg 32 by means of a square section tube 32a secured to the leg 32 (see in particular FIG.
• the scaffolding floor 29 is fixed on the two crosspieces 26 of the brackets 22 resting on the ground as shown in FIGS. 2 and 10 and for this purpose comprises at each of its ends two hook-shaped elements 39 secured to a corresponding crosspiece 29a of the structure of the floor 29 by projecting therefrom so as to come to bear on the corresponding crosspiece 26.
• the floor 29 can be of the telescopic type, known per se, making it possible to adapt to 1 ' variable spacing of two consecutive peaks.
• the floor 29 has an opening 40 with a flap 41, of the hatch type, fixed in an articulated manner to one of the side members 29b of the floor so as to be able to switch from the closed position of the opening 40 to an open position thereof by thrust exerted under the flap 41 by the end of a ladder 42 resting on the ground.
• the flap 41 has a hole 41a for the passage of a finger with one hand to allow an operator located on the floor 29 to lift the flap in the open position to descend from this floor by the ladder 42, l upper end of the ladder being held in the hatch
• Two guardrail posts 43 each comprising hooking and support elements 43a of horizontal guardrail boards, horizontal tubes or nets (not shown), are fixed respectively to the two free ends of the two crosspieces 26 opposite those carrying the end pieces 25, by introducing the cylindrical lower end part of each post 43 through a hole made at the corresponding end of the cross member 26.
• an operator takes the pole 3 to fix a pulley jib 2 at the upper end of it and lifts the pole 3 to the level of a chosen anchor bolt 1 where it places the housing 16 of the bracket 2 above the stud 1 so that then lowering the pole 3 by a determined distance, the housing 16 engages by interlocking on the stud 1 which then rigidly maintains the bracket 2 by fully entering the attachment box 16.
• the operator can then disengage the pole 3 from the bracket 2 by pulling down on this pole.
• the operator fixes a second pulley jib 2 at the upper end of the pole 3 to raise it so as to present the jib at another anchoring bolt in the same row where the housing hooking 16 of this bracket is presented above the second anchoring stud 1.
• the housing 16 By lowering the pole 3 by a predetermined distance, the housing 16 is engaged on the stud 1 which rigidly maintains the bracket 2 by fully entering this housing . The operator then releases the pole 3 from the bracket 2 by simply pulling down on this pole or else the pole remains in place.
• the floor 29 is then fixed on the two crosspieces 26 of the two consoles 22 resting on the ground before or after the fixing of the flexible links 15 to the two consoles and then the two railing posts 43 are fixed respectively to the two ends of the crosspieces 26.
• the scaffolding system thus assembled is as shown in FIG. 2.
• the two housings 21 of the two " brackets 22 are introduced under the respective crosspieces 9 of the bracket 2 and into the U-shaped guide part 27 so that they then fall by gravity onto the two anchoring pins 20 which then rigidly lock the boxes 21 and therefore the consoles 22 at their respective brackets 2.
• the scaffolding is then fixed to the front wall M with its floor 29 perpendicular to this wall as shown in FIG. 4.
• the dismantling of the scaffolding is carried out by performing the above operations in the opposite direction, taking care, when the operator is still on the scaffolding floor 29, to pass the part of the flexible link 15 leaving the pulley 10 and then descending vertically, so as to increase the lever arm to disengage each end piece 25 of a console 22 of the corresponding anchor pin 20.
• the two operators by pulling sharply and simultaneously on the two flexible links 15, can exert on the two end pieces 25 a sufficient tensile force to remove the latching boxes 21 from their respective anchoring studs 20 so that the scaffolding occupies a position corresponding substantially to that shown in FIG. 3.
• the scaffolding descends towards the ground by rolling over the wall M via the wheels 34 with the scaffolding tilting more and more by r contribution to this wall until the ends of the legs 32 come to bear on the ground and, continuing to release the flexible links 15, the wheels 34 in turn come into contact with the ground.
• Each operator then undoes the nodes 15a of the links 15 and then removes the scaffolding floor 29 from the two brackets 22 after having previously removed the two posts guardrail 43. Then, an operator grasps the pole 3 to introduce into the upper end thereof the tubular portion 5 of a bracket 2 and, by pushing on the pole 3, the operator can then disengage the housing of attachment 16 of the corresponding anchor bolt 1 and place this bracket on the ground.
• the operator removes the other bracket 2 from its anchoring stud 1 by introducing the tubular portion 5 thereof into the upper end, if necessary flared, of the pole 3 and exerting a pushing force on this pole to disengage the attachment housing 16 of the anchor bolt 1 so as to bring this other bracket back to the ground.
• the suspended scaffolding is easily erected and dismantled from the ground using scaffolding elements and a pole of very simple structures.
• FIG. 8 shows an alternative embodiment of a pulley bracket 2.
• the bracket of FIG. 8 differs from that of FIG. 5 in that it comprises two adjustable support feet constituted respectively by two threaded rods 44 fixed to the two ends of a rigid plate 45 fixed transversely, by welding, to the lower end part of the upright 4 of the bracket 2. More precisely, each threaded rod 44 comprises at one end an operating handle 46, passes through a tapped hole of a piece forming a nut 47 fixed by welding on the front face of the plate 45 and has at its end opposite to the handle 46 a cup-shaped element 48 bearing on the front wall M.
• the variant embodiment of the bracket 2 shown in FIG. 9 differs from the bracket of FIG. 5 only by the addition of a piece with a U-shaped cross section 49 fixed to the upper part of the upright 4 of the bracket so as to extend from one side of the latter perpendicular to the longitudinal median plane of the bracket 2.
• This part 49 is intended to receive an end part of a rail 50 visible in particular in FIG. 13 and forming part of a device allowing to make another scaffolding extending a scaffolding already mounted to the two corresponding anchoring studs 1 of a facade wall.
• FIG. 9 also shows an alternative embodiment of an anchoring stud 1, the leg 1b of which is extended to form a relatively long rigid plate at the end of which is fixed by welding a plate le, another rigid plate If being fixed to the lower edge of the plate of the leg lb perpendicular to the latter and intended to bear on a building element, such as a block of cement or concrete block, with the leg part lb arranged in the joint part between two successive blocks mounted on the one on which the plate lf is supported.
• a building element such as a block of cement or concrete block
• FIGS. 11A to 11E represent various embodiments of anchoring studs 1.
• the stud 1 of FIG. 11A comprises a rigid plate which is fixed by welding to the end of the leg 1b perpendicular to the latter and has holes lel allowing the fixing of the peg in the frontal part of a framework or a metal post with, if necessary, the welding of the plate to this frame or that post. According to FIG.
• the anchoring stud 1 comprises a relatively long vertical plate constituting the leg 1b thereof and pierced with one or more holes lel allowing lateral attachment to a frame or a metal post by bolts with , if necessary, welding a part of the leg 1b to this frame or this post.
• the anchoring stud 1 of FIG. 11C also allows the lateral fixing of the latter to a metal frame or a metal pole by means of a plate 1g fixed to the end of the leg 1b in the same plane as this one with through holes lb of bolts for fixing to the frame or to the post and, if necessary, the welding of the plate lg to this frame or this post.
• FIG. 11C the anchoring stud 1 comprises a relatively long vertical plate constituting the leg 1b thereof and pierced with one or more holes lel allowing lateral attachment to a frame or a metal post by bolts with , if necessary, welding a part of the leg 1b to this frame or this post.
• the anchoring stud 1 has its leg 1b fixed by welding to a square part lh, each branch of which is pierced with at least one lel hole and allowing fixing to a metal square by bolts and, the if necessary, welding, on this bracket.
• the various anchoring studs described above in FIGS. 11A to 11D can be fixed by fixing screws of the lag screw type to corresponding wooden structures.
• the anchoring stud 1 has its leg lb fixed by welding to a plate li preferably perpendicular to the leg lb and to the upper part of which is fixed, by welding, one end of a threaded rod lj intended to pass through the wall of a wall, a plate forming part lk being mounted on the threaded rod and a wing nut 11 being screwed to the end of the threaded rod lj opposite the plate li so as to fix the assembly to the wall by tightening the nut 11 on the plate lk resting on an internal wall of the wall to bring the anchoring stud 1 into abutment on the external wall of the wall by means of the plate li.
• the threaded rod 1j may comprise at its free end a deformable element, such as a wire, allowing its introduction into a hole in the wall by means of an overturned housing, such as the housing 16 of the bracket 2, in which the peg 1 is hung, so that by pulling on the deformable element on the other side of the wall, the threaded rod 1j is introduced in a guided manner into the hole in the wall.
• a deformable element such as a wire
• Figures 12 to 19 show the mounting of a second scaffolding whose floor must be located in extension of the scaffolding floor of a first scaffolding initially mounted on the front wall as explained in the method of the first embodiment.
• Figure 12 also shows the first scaffolding mounted on a facade wall M and the scaffolding floor 29 is fixed on the two brackets 22 fixed respectively on the two brackets 2 themselves fixed to their respective anchor bolts 1.
• an operator climbs on the ladder 42 to access the scaffolding floor 29 as already explained above.
• the operator grasps the rail 50 previously mounted on the scaffolding and lifts the rail 50 as shown in FIG. 14 to fix its free end opposite the scaffolding to another anchoring stud 1 located on the same row of anchoring studs 1 for fixing the jibs 2.
• the rail 50 as can be seen better from FIG.
• the housing 51 comprises, in the vicinity of its free end portion, a hooking box 51 substantially identical to the attachment housing 16 to plates 19 of the bracket 2 and fixed on a part of the back side of this rail.
• the housing 51 also includes a slot 52 identical to the slot 1 " of the housing 16 so as to allow the housing 51 to be fixed by interlocking to the anchoring stud 1.
• the rail 50 is in the form of a hollow section tube transverse rectangular, split on one side, the side walls on either side of the slot 53 of the tube constituting raceways of a carriage 54 internal to the tube and supporting outside the tube an anchor bolt 55 of structure identical to the anchor stud 1.
• the stud 55 is intended to receive a hooking box 21 for the end piece 25 of a third console 22 identical to the brackets 22 previously described except that the wheels 34 mounted at the two ends of the support bar 33 are located in a plane parallel to the plane containing the bar 33, that is to say that they occupy a horizontal position in the position of use.
• the wheels 34 are removably fixed to their respective support axes 33a fixed by welding to the two ends of the bar 33 perpendicularly to the latter so as to also allow removable fixing on two axes of support 33b fixed by welding to the two ends of the bar 33 in extension thereof to place these wheels in the vertical position of use.
• the rail 50 also comprises a bar 56 forming a rail operating pole fixed at one of its ends to the rail 50, preferably by welding, so that the bar 56 is located in the median longitudinal plane of the rail 50, the bar 56 having its intermediate part fixed to the rail by a stirrup 57 so that the bar is inclined upwards above the rail 50 starting from its end secured to this rail.
• the free end of the rail 50 opposite the bar 56 comprises a part 58 with a U-shaped cross section fixed in the extension of the rail 50 and which can serve as a support for another rail in extension of the rail 50 when the latter is fixed by its attachment box 51 to the corresponding anchoring stud to make a third scaffolding in continuation of the two previous ones.
• the operator grasps the rail 50 by the bar 56 to fix it to the distant anchoring stud 1 by its housing. hooking 51 and then engages the end part of the rail opposite the housing 51 in the U-shaped support piece 49 of the bracket 2 as shown in FIG. 15, so that the rail occupies a substantially horizontal position. Then, the operator grasps a console 22 with horizontal wheels 34 previously deposited on the scaffolding floor 29 to fix it by its attachment box 21 to the movable anchor pin 55 positioned near the scaffolding, as shown in Figure 16.
• Figure 17 shows that the operator has entered a second floor 29, if necessary previously adjusted in length, identical to the first floor and previously placed on the latter, to deposit it by the two extreme hooks 39 on the crosspiece 26 of the third console 22 and then moved the third console 22 along the rail 50 by sliding the carriage 54 and rolling the wheels 34 of the console 22 along the front wall M by exerting a pushing force on the floor scaffolding 29 until the third console 22 is brought to a position remote from the first scaffolding such that the operator can then fix the opposite end of the second floor 29 on the corresponding cross member 26 of the first scaffold by means of the two end hooks 39, as shown in FIG. 18.
• This figure shows that the second scaffold floor 29 is in a horizontal position in extension of the first floor 29.
• the dismantling of the second scaffolding by an operator from the first scaffolding is carried out by repeating the above mounting operations in reverse.
• the operator lifts the end part of the second floor 29 of the console 22 of the first scaffolding and exerts a tensile force on the second floor 29 to slide the assembly constituted by the carriage 54 and the console 22 towards the first scaffolding to a position close to the latter at which the operator lifts the opposite end part of the scaffolding floor 29 to disengage it completely from the third console 22.
• the operator unhooks the console 22 from the piton anchor 55 and, after placing this console on the first scaffold, grips the handling bar 56 of the rail 50 to unhook the housing 51 thereof of the anchor bolt 1, the rail then being deposited on the first scaffolding.
• FIGS 20 to 22 show a second embodiment of the suspended scaffolding system of the invention.
• This system comprises two identical masts 59 fixed vertically to their upper end parts respectively to two anchoring studs 1 in the same row by means of attachment boxes 60 fixed by welding to the dorsal faces of these parts. ends and each of a structure substantially identical to that of the attachment housing 16 of a bracket 2. More specifically, each mast 59 comprises a central element of great length
• each end element 62 is fixed relative to the central element 61 in a selectively adjustable position by a fixing bolt 63 introduced through suitable holes opposite of these two elements and being part of a series of holes along them.
• the attachment box 60 is fixed to the dorsal face of the upper end element 62.
• a crank winch 64 is fixed to the lower end element 62 by means of a fixing bracket 65 and has its sling 66 starting from the winch 64 s winding on a deflection pulley 67 mounted on a yoke 68 secured to the end of the element 62, passing through the lower element 62, the central element 61 and leaving the upper end element 62 passing over another deflection pulley 69 mounted on a yoke 70 integral with the end of the element
• a movable member 71 slidably mounted along the central element 61 of the mast 59 and preferably constituted by a sheath with a square or rectangular cross section closely surrounding the element 61.
• the movable member 71 supports on its front face and perpendicular thereto a anchor pin 72 of a structure identical to anchor pin 1 and to which can be fixed by interlocking the attachment housing 21 of the end piece 25 of a console 22.
• the movable member 71 may comprise on the one of its side walls, a ratchet and return spring assembly (not shown) and capable of engaging in one of the holes made along the central element 61 to block the movable member 71 at the mast at a predetermined height .
• the central element 61 of each mast 59 comprises a foot 73 fixed by welding to the dorsal face of the lower end part of the central element 61 and coming to bear on the front wall M when the mast 59 is hooked to the anchor pin 1.
• the winch 64 known per se, is of the type in which one of the drive toothed wheels turns freely in one direction and whose rotation in the other direction can be blocked by a deactivatable pawl and vice versa .
• FIG. 20 shows the two masts 59 fixed to the wall of facade M.
• the two masts 59 thus constitute a device for lifting assembled scaffolding elements constituted by two consoles 22 and a scaffolding floor 29 mounted thereon.
• each console 22 is also in abutment at its lower part on the front wall M by means of the two vertical wheels 34.
• the lower support structure of the console 22 can comprise a part forming a slide 74 at least partially surrounding a corresponding part of the tube of the central element 61 so as to ensure perfect guidance of the console along the central element 61 of the mast 59.
• the operator grasps a scaffolding floor 29 for the fix by its end hooks 39 on the two crosspieces 26 of the two brackets 22 in their low position.
• the operator fixes the two railing posts 43 at the corresponding ends of the two crosspieces 26 of the brackets 22 and the other railing elements, not shown, such as horizontal boards, horizontal tubes or nets. Two operators then simultaneously turn the two cranks of the two winches 64 so that the slings 66 make the two movable members 71 slide upwards.
• the dismantling of the scaffolding system of this second embodiment is carried out by repeating the above operations in reverse.
• the two operators located on the ground operate the two cranks of the two winches 64, after having deactivated the two locking pawls thereof, in a direction of rotation bringing down the mobile members 71 as well as the assembly constituted by the two consoles 22 and the scaffolding floor 29 to the lowest position at which one of the operators removes the scaffolding floor from the two consoles and then successively disengages the two consoles 22 from their respective anchoring pins 72 for weigh these scaffolding elements on the ground.
• the scaffolding system of this second embodiment can also be arranged so as to allow the mounting of a second scaffolding in extension of the first scaffolding according to this embodiment, preferably by providing in the upper part of each of the two central elements.
• 61 masts 59 one U-shaped piece
• FIG. 23 represents a device forming an end piece 75 which can be removably fixed to the end of the pole 3 so as to be fixed in a disengageable manner to an anchoring peg, certain embodiments of which will be defined later, fixed to a part of roof of the building projecting outside thereof.
• This device 75 is intended to allow a person, in particular a roofer, to make sure to mount on the roof of the building from a scaffolding erected in accordance with the first or second embodiment described above.
• the device 75 comprises a rigid bar in the form of a plate 76 at the upper part of which is fixed a hanging box 77 of the same structure as the hanging box 16 of a bracket 2, that is to say that is to say essentially comprising the slot 78 through which the leg of an anchor bolt is engaged and coming to bear by its upper edge on the bottom of the corresponding notch of this leg and two diverging plates 79 to guide the fitting of the housing 77 onto the anchor bolt.
• the lower end part of the plate 76 comprises a tubular part 80 fixed by welding to the front face of the plate and intended to engage removably in the upper end of the pole 3.
• a pin 81 fixed to the lower end part of the plate 76 by a chain 82 can be used to temporarily hold, especially during transport of the device 75 from the ground to the scaffolding, the device 75 at the end of the pole 3.
• a part 83 in the form of a handle or grip handle is also fixed on the front face of the plate 76 and is intended in particular for fixing, by means of a carabiner (not shown), of the end of a flexible link, such as a rope, the opposite end of which is fixed to a harness worn by the roofer.
• FIG. 25 shows the device 75 about to be engaged, by its attachment box 77, in a front opening of a cat flap 85 of the roof so that this box can be fixed by interlocking to the stud d anchor 84 of identical structure to the front anchor stud 1 and perpendicular to the slope of the roof.
• the cat flap 85 has its so-called ventilation face which can be closed by a tilting grid or elements forming flexible combs.
• the two anchoring studs 84 located respectively on the two ramps of the roof are fixed respectively at the two ends of two identical arms 86 articulated relative to each other in the manner of a compass on the ridge purlin 87 by the intermediary of two angle support pieces 88 whose two vertical branches facing each other form a support bracket for the two arms 86 and the two other branches are fixed on the upper side of the ridge purlin 87.
• the two arms 86 are pivotally mounted on an axis 89 parallel to the purlin 87 and the two ends of which are engaged respectively in two vertical oblong holes in the vertical arms of the stirrup.
• Each arm 86 is preferably made up of two tubes telescopically mounted one inside the other 91 and 92 with square or rectangular cross sections, the internal tube 91 carrying, near its free end, the corresponding anchoring stud 84 whose leg 84a is engaged in a sheath with a rectangular cross section 93 fixed perpendicular to the end of the inner tube 91, the leg 84a being able to be fixed in a position selectively adjustable in the sleeve 93 by means of an axis, a pin or a fixing bolt (not shown).
• the internal tube 91 is fixed relative to the external tube 92 at a position selectively adjustable by an axis, a pin or a bolt (not shown) passing through the two tubes.
• Each internal tube 91 has on its upper side a transverse bar 94 which can slide on the tube 91 by a stirrup piece 95 and intended to be fixed, by means of screws of the lag screw, on two rafters 96 of the frame. roof so as to fix each arm 86 between these two rafters parallel to these with the anchor stud 84 protruding above the plane passing over these rafters.
• Each anchoring stud 84 is covered by the cat flap 85 and is accessible from the outside through the tilting grid or the flexible combs.
• the two anchoring studs 84 can be fixed at a position relative to the rafters and to the ridge purlin 87 to facilitate the mounting of the elements of the roof and the two oblong holes 90 allow movement in a vertical direction of the support axis 89 of the two arms 96 so as to take account of these variations in inclination of these arms depending on that of the rafters 96.
• Figure 26 shows another embodiment of fixing a roof anchor bolt of a building.
• the anchoring stud 84 of the roof of the building accessible from the outside like the studs 84 of the embodiment of FIGS. 24 and 25, is fixed to a piece forming a sheath 97 slidingly mounted on a metal crosspiece.
• support 98 fixed at its ends respectively on two successive rafters 96 of the framework in cois by means of fixing screws of the lag screw type.
• the sleeve piece 97 is positioned relative to the crosspiece 98 by two links in the present case constituted by arms 99 articulated at their ends to the sleeve so as to be able to move away or be bring each other closer in the same plane parallel to the plane of the rafters 96, the articulated arms 99 being fixed to their end portions opposite to those articulated to the piece 97 on the two rafters 96 by means of screws fastening 100, of the lag screw type so as to maintain the sleeve piece 97 and the anchor stud 84 in a desired desired position depending on the assembly of the tiles 101 on the rafters of the roof with the stud 84 protruding at creeping from the roof and covered by a cat flap tile 101 of the kind shown in FIG.
• the sleeve piece 97 comprises a sleeve 102 of rectangular cross section fixed perpendicular to the plane passing through the two arms 99 opposite them and in which is fixed, at a selectively adjustable position, the leg 84a of the peak of anchoring 84, the fixing of this piton being effected by a pin or a bolt; not shown) passing through the sleeve 102 and the leg 84a.
• the sleeve 102 can be fixed on the side of the arms 99.
• the device for fixing the roof anchor stud described above makes it possible to easily adjust the position of this stud relative to the structural elements of the roof to allow the mounting of the roof tiles.
• FIG. 28 represents yet another embodiment for fixing a roof anchor bolt 84 fixed to a common breakdown 103 of the wooden frame of the roof of the building and comprising two tubes with square or rectangular cross sections mounted telescopically one inside the other 104 and 105 and perpendicular to the purlin 103, the internal tube 104 carrying at its end the anchoring stud 84 and the external tube 105 being fixed on the purlin 103 on the one hand by one or , as shown, two plates 106, one of which is integral with the base or lower side of the tube 105 by welding and fixed to the purlin 103, parallel to the longitudinal axis thereof, by fixing screws of the tire type bottom 107 and the other is secured by welding a sheath 109 and fixed to the purlin 103 by fixing screws 107 of the lag screw type.
• an upper rigid plate 108 is secured by welding the sheath 109 mounted on the free end part of the outer tube 105 opposite the stud 84, the plate 108 being perpendicular to the tube 105.
• the upper plate 108 is fixed to the current failure 103 by two angled rods 110, one of the branches 110a of each rod 110 perpendicular to the external tube 105 having a threaded part passing through the corresponding end of the upper plate 108 while the other branch 110b of the rod 110, parallel to the external tube 105 and passing under the current purlin 103, having at its end a boss in point HObl penetrating into the wood of the purlin 103 when two butterfly nuts 111 are screwed respectively on the two threaded parts 110a to block the plate upper 108 in position relative to the outer tube 105 and perfect the fixing of this tube to the tip 103.
• the inner tube 104 is fixed in a position selectively re adjustable relative to the tube 105 by a pin or bolt 112 passing through the two tubes.
• the roof anchor stud 84 shown in FIG. 29 is fixed to a metal purlin profiled in I 113 forming part of a metal frame of the roof, by means of a hollow tube 115 with square cross section or rectangular in which the leg of conjugate shape of the stud 84 is slidably mounted, the external hollow tube 115 being fixed on two parts of the upper edges of the fins opposite 114 of the purlin 113 by two pairs of tie rods 116 located on the right and other of the fins 114 and having at their ends opposite to the tube 115 hook parts 116a anchored on the parts of the lower edges of the fins 114 opposite to those on which the tube 115.
• the tie rods 116 of a pair have their threaded portions 116b passing through a rigid plate 117 fixed by welding to the external tube 115 in the vicinity of the passage opening of the leg 84b, the tie rods being locked by tightening nuts. 120 on the plate 117.
• the tie rods 116 of the other pair have their threaded parts 116b respectively passing through two cylindrical tubes 118 fixed by welding respectively to the two lateral faces of a sleeve 119 mounted on the end part of the opposite outer tube 115 to the anchor pin 84 outside the metal purlin 113.
• the tie rods 116 of this pair are locked in position on the purlin 113 by tightening nuts 120 screwed onto the threaded parts 116b of the two tie rods.
• the outer tube 115 is rigidly fixed to the metal purlin 113.
• the leg 84a is fixed to a selectively adjustable position in the tube 115 by a pin or a bolt 121 passing through it and one of the holes 84bl drilled through the leg, so as to adjust the projecting position of the stud 84.
• the device as shown in Figure 30 allows to fix the retractable anchor bolt 1 during the construction of a facade wall using building blocks such as cement blocks or concrete blocks.
• This device comprises a rectangular cross-section tube 122 in which the elongated leg lb of the stud 1 can slide between two extreme positions, one of which is retracted and the other projecting from the wall M, and delimited by an axis or a bolt 123 passing through the tube 122 as well as an oblong hole lbl made through the leg lb of the stud 1 parallel to the longitudinal axis of the tube 122.
• the latter comprises at one of its ends a rectangular plate 124 fixed by welding to this end perpendicularly to the tube 122 and coming to bear against two parts of walls or internal faces of two consecutive blocks in the joint part of which the tube 122 is disposed bearing by its lower side on the underlying block to the two consecutive blocks.
• the other end of the tube 122 ends in a part in the form of a housing 125 to which this end opens, the wall delimiting the rear part of this housing 125 being in abutment on the external face of the blocks.
• the housing 125 receives the active part of the peg 1 in the retracted position thereof.
• the housing 125 is partly embedded in the covering, such as a plaster, which will be applied to the external face of the block wall and a mesh 126 is provided by projecting from the four sides of the housing 125 while being embedded in the covering in order avoid any subsequent cracking of it.
• a flap 127 in the form of a plate mounted so as to slide captively in two lateral slides of the housing 125 is provided for closing the latter in the retracted or retracted position of the anchoring stud 1.
• This flap comprises a hook 128 fixed in the lower part of it by welding to bring the flap to its open position by pulling down on the hook member 128, for example using a pole, this flap being closed by pushing up on the latter after use of the piton 1.
• the anchor bolt 1 is mounted tilting in a retractable manner in a box 129 of general shape in a rectangular parallelepiped oriented vertically and embedded in the concrete of a front wall in the manner which will be explained below.
• the housing comprises a rigid flat square piece 130 whose branch 130a, perpendicular to the rear wall of the housing opposite to that comprising the opening allowing the tilting of the anchoring stud 1, crosses this rear wall to penetrate into the housing 129.
• the end of the branch 130a inside the housing 129 has an axis 131 perpendicular thereto and on which the stud 1 can tilt from a retracted position in the housing 129 parallel to the longitudinal axis of the housing at a position out of use through the opening of the housing and perpendicular to this longitudinal axis.
• the piton 1 is held in its position of use by a stop lb2 secured to the leg lb of the piton and resting on the internal end of the branch 130a of the part 130.
• the square part 130 has its branch 130b supporting a plate 132 fixed at the end, by welding, of the branch 130b perpendicular to the latter and comprising a tapped hole crossed by a screw 133 extending parallel to the branch 130a of the square piece 130.
• the housing 129 is in fact made up two parts, a larger housing part 129a intended to be embedded in the concrete, which receives the stud 1 in the retracted position, and a smaller external front housing part 129b which can be fixed removably in the opening of the housing 129a by means of elastic tabs, for example of sheet metal 134 secured to the internal peripheral edge of the housing part 129b and coming to bear elastically against the parts " corresponding to the internal faces of the walls of the housing part 129a.
• the housing part 129b has its front opening closed by a plate shutter 135, identical to the shutter 127 in FIG.
• the shutter 135 is slidably mounted in a captive manner in two lateral slides of the housing part 129b.
• the mounting of the device in FIG. 31 to allow it to be partially embedded in concrete will now be described with reference to FIG. 32.
• the opening of the housing part 129a is closed by a removable plate 129c fixed to the latter by elastic tabs, for example sheet metal 129d in the same way as the cover part 129b.
• Figure 32 shows the presence of two walls 137 such as wooden planks of a formwork arranged vertically and separated from each other by a distance allowing the introduction of the assembly formed by the housing part 129a , the square piece 130 and the screw 133 so as to place the closure plate 129c of the opening of the housing part 129a in abutment against the corresponding wall 137 while the screw 133 is operated in the direction of screwing to bring its free end in forced abutment against the other wall 137 in order to maintain the housing part 129a in the fixed position shown in FIG. 32.
• two walls 137 such as wooden planks of a formwork arranged vertically and separated from each other by a distance allowing the introduction of the assembly formed by the housing part 129a , the square piece 130 and the screw 133 so as to place the closure plate 129c of the opening of the housing part 129a in abutment against the corresponding wall 137 while the screw 133 is operated in the direction of screwing to bring its free end in forced abutment
• This figure shows the presence of an armature rod 138 passing through a bore 130bl of the branch 130b of the square part 130 so as to rigidly hold the housing part 129a in concrete poured between the walls 137 of the formwork to drown the housing part 129a and its associated external elements.
• the walls 137 are removed so as to update the closure plate 129c of the housing part 129a to remove it and then fix the removable housing part 129b which is closed by its shutter.
• shutter 135 for keeping the anchor bolt 1 in the retracted position in the housing 129.
• the device shown in Figure 33 comprises a housing 139 having the general shape of a rectangular parallelepiped embedded horizontally in concrete and in which is fixed a hollow tube 140 of rectangular cross section by welding one of its ends to the rear wall of the housing 139 so that the tube 140 extend in the longitudinal direction of the housing 139.
• the tube 140 is adapted to receive sliding way a relatively long metal plate constituting the leg lb of the anchor bolt 1 so that it can occupy a retracted position in the tube 140 and the housing 139 or an external position of use.
• the stroke of the anchoring stud 1 is limited by an axis 141 passing through the two vertical side walls of the housing 139 perpendicularly thereto and an oblong hole 142 formed through the vertical leg 1b of the stud 1 extending parallel to the longitudinal axis of the housing 139.
• the axis 141 has two end threaded portions 141a on which are tightened nuts 143 for fixing the axis 141.
• the housing 139 further comprises a rigid plate 144 fixed by welding on the upper face of this housing perpendicular to its longitudinal axis and which has a threaded hole through which passes a screw 145 extending parallel to this longitudinal axis.
• the housing 139 consists of two parts, a larger part 139a to be embedded in the concrete and a smaller part 139b which will be removably fixed to the opening of the housing part 139a once the latter has been sealed in the concrete.
• the fixing of the housing part 139b to the part 139a comprises a certain number of elastic tabs, for example of sheet metal 146 fixed to the internal peripheral edge of the housing part 139b and engaging elastically by force against the eorrespcndantes parts of the internal faces of the four walls of the part this housing 139a.
• the outer casing part 139b is closed off by a plate shutter 147 mounted to slide in two lateral slides of the casing part 139b and in a captive manner.
• the flap 147 has at its lower part an operating hook 148 for bringing this flap into the open position by pulling down. on it or in the closed position by pushing it up.
• the method for embedding the housing part 139a in concrete is carried out in a manner generally identical to that for embedding the housing part 129a in FIG. 32. It is therefore unnecessary to describe such a method again in detail.
• the housing 139 may comprise at its closing wall opposite its opening, a plate (not shown) of the self-adhesive or magnetic type, removably fixed to this wall and allowing the positioning of the housing on the internal wall of a formwork metal before closing it.
• FIGS. 34 and 35 represent the use of adapters for fixing front anchoring studs 1 to pre-existing anchoring elements in the front walls, in particular of old buildings.
• the pre-existing anchoring element consists of a ring 149 fixed in the front wall M and to which an anchoring stud 1 can be hung.
• This anchoring stud which includes, like the other studs , the head 1a, the leg 1b and the notch 1d, is provided with an adapter element 150 consisting of a hook generally in the form of a C, one of the branches of which is fixed by welding to the upper part of the leg 1b.
• the anchoring stud 1 comprises a nut element 151 fixed by welding to the lower side of the leg 1b and through which a screw passes 152 allowing the piton 1 to be held in the housing 16 of the bracket 2 by coming into tight support on the corresponding dorsal face of the upright 4 of this bracket.
• the screw 152 associated with the anchor pin 1 of the embodiment of Figure 34 and having the same function.
• the stud 1 is fixed to a horizontal axis or bar 153 sealed in a vertical window 154 of the front wall M transversely to the latter.
• the bar 153 comprises two rods 155 obliquely extending its two ends towards the rear thereof and embedded in the concrete of the front wall M, the bar 153 being further mounted transversely between two side walls of a housing 156 embedded in the concrete of the wall, allowing window 154. to appear from the outside.
• This housing which may be made of plastic, is preferably in the form of a hollow cylindrical segment.
• the anchor bolt 1 is fixed to the bar 153 by means of an adaptation piece 157 to an upper hook 158 and to a lower ring 159 located approximately in the same plane.
• the anchoring stud 1 cannot be detached from this bar by simple vertical upward push on the stud since the free end of the hook 158 is sufficiently close to its part of base to prevent the bar 153 from passing through these two parts of the hook. Disassembly of the upper hook 158 from the bar 153 can only be carried out by lifting and pressing the upper hook 158 relative to the bar
• the lower ring 159 is fixed to the leg 1b of the peak 1 by a fixing bolt 160, the head of which energetically clamps the ring 159 against the corresponding lateral face of the ja be lb. It should be noted that the two devices of Figures 34 and 35 are used to fix in particular the pulley jib 2 comprising the two stabilizing feet 44 of FIG. 8.
• Figures 36 to 38 show an embodiment of a telescopic pole 161 allowing an operator remaining on the ground to successively hang pulley jibs 2 like the pole 3 but at heights greater than this, for example from the '' from 10 to 20 meters.
• the pole 161 comprises three U-shaped sections 162, 163 and 164 nested one inside the other, respectively a section with a larger section 162, a section with a medium section 163 and a section with a smaller section 164.
• the section with a smaller section 164 has at its free end a tubular part 165 fixed by welding and intended to receive the tubular part 5 of a pulley jib 2.
• the displacement of the profile 164 relative to the profile of medium section 163 is controlled by a flexible link 166, such that a rope, wound on a deflection pulley 167 fixed to an axis 168 fixed by welding between the two fins of the profile of medium section 163 at its end of passage of the profile of smaller section 164.
• One of the ends of the link flexible 166 is fixed to an axis 169 fixed transversely between the two fins of the section of smaller section 164 opposite the free end of this section comprising the tubular part 165 , so that a traction exerted on the link 166 causes the displacement in the direction of deployment of the section of smaller section 164 relative to the section of medium section 163.
• a pawl 170 making it possible to block the section of smaller section 164 relatively to the medium section profile 163 at a determined deployment position of the profile 164, is pivotally mounted on a support pin -171 fixed transversely between the two fins of the profile of medium section 163 at a distance relatively close to the pulley 167.
• the pawl 170 is elastically recalled by a spiral torsion spring 172 in a direction of tilting towards the bottom of the profile 164 so that one of the transverse bars 173 fixed to regular intervals at the bottom of the lower section 164 profile comes into abutment, by gravity when the pole
• the flexible link 166 passes through an eyelet 174 secured to the part upper of the pawl 170 so that by pulling on the link 166, the pawl 170 is automatically tilted to a disengaged position from one of the transverse bars 173.
• the traction exerted on this link 166 unlocks the pawl 170 of a transverse bar 173 to allow the controlled descent of the section 164, by retaining the link 166, in the section 163 to a position where, by releasing the traction on the link 166, the pawl switches to the blocking position at which one of the bars 173 abuts against the pawl to maintain the profile 164 for its more or less retracted position desired.
• the displacement of the profile of medium section 163 relative to the profile of larger section 162 is controlled by another flexible link 175, such as a rope, wound on another return pulley 176 fixed to an axis 177 fixed transversely between the two fins of the section of larger section 162 in the vicinity of its passage end of the section of medium section 163.
• the link 175 has one of its ends fixed to an axis 178 fixed transversely between the two fins of the section of section medium 163 to l 'opposite of the first deflection pulley 167, so that a traction exerted on the link 175 causes the displacement in the direction of deployment of the profile of medium section 163 relative to the profile of larger section 162.
• Another pawl 179 allowing block the medium section profile 163 relative to the large section profile
• the 162 has a desired position, is pivotally mounted on an axis support 180 fixed transversely between the two fins of the large section profile 162 at a distance relatively close to the pulley 176.
• the pawl 179 is recalled by a spiral torsion spring 179a mounted on the axis 180 in a position tilted towards the bottom of the profile 163 so that one of the bars 181 fixed between the two fins of the profile of medium section 163 comes into abutment, by gravity when the pole 161 is lifted, against a corresponding part of the pawl 179 to retain the profile 163 to a relative deployed position.
• the link 175 also passes through an eyelet 182 secured to the upper part of the pawl 179 so that by pulling on the link 175, the pawl 179 can switch to the unlocking position of one of the bars 181 against which it is in abutment to authorize the controlled descent of the medium section profile 163 to a retracted position in the large section profile 162.
• the telescopic pole 161 finally comprises at the lower end of the large section profile 162 a support bar 183 fixed on the ground transversely to this profile.
• Figure 39 shows the gable of a building wall at the top of which are fixed, for example at different heights, five scaffolds E1-E5.
• Each of these scaffolds can be produced from the system of one or other of the two embodiments described above and, in any case, each scaffold floor is mounted on two brackets 22 as described above.
• Figure 40 shows in side view two brackets 22 located at two different heights to support two scaffolding floors (not shown).
• This figure like FIG. 41, shows that each console 22 fixed to the front wall M to an anchoring stud 1 by means of its attachment box 21, supports two long, flexible vertical elements 184 descending to ground, such as ropes or cables or preferably, as shown, straps, located in a plane substantially perpendicular to the facade wall M.
• the elements 184 comprise along these and opposite loops 185 rigidly fixed to these elements and in which are removably fixed metal U-shaped fasteners 186.
• Two fasteners 186 opposite -vis have their connecting arms fixed by welding respectively to two ends of a bar 187 arranged so as to occupy a transverse position between the two elements 184, that is to say substantially perpendicular to the front wall.
• Two bars 187 of the same level allow the fixing of a scaffolding floor 188 identical to the scaffolding floors 29 described above, by means of hooks 189 fixed to the two ends of the floor 188.
• each fastener 186 to a loop 185 is effected by a pin 190 passing through one end of one of the branches of the fastener 186 and the loop 185 to be fixed, by screwing, in a tapped hole of the opposite end of the other branch of the fastener 186.
• the fixing of each upper end of an element 184 to the console is also carried out by means of a metal fastener in the form of U 186 whose branch is fixed by welding or by an adjustment screw at a suitable location on the console 22, the fixing pin 190 passing through the free loop-shaped end of the element 184.
• FIG. 41 shows that the fastener 186 of the element 184 closest to the front wall M es t fixed by welding under the support leg 32 of the console 22 while the fastener 186 for fixing the other element 184 is fixed by welding under the free end of the crosspiece 26.
• This suspension system with flexible elements 184 allows an operator to successively manually mount scaffolding floors 188 from a location relatively close to the ground, even when the latter is inclined as shown in FIG. 39, to the supported upper scaffolding floor 29 by two consoles 22.
• each console 22 can include a threaded rod 191, operable by a handle 192 at one end thereof, and passing through a square section tube 193 fixed to the upright 30 and to the reinforcing leg 31 projecting from either side thereof, so that a rotation of the threaded rod 181 relative to the tube 193, via of one or more nut-forming elements fixed in this tube, causes the end of the threaded rod 191 opposite the handle 192 to move to a bearing position on the front wall M by means of a plate for example in the form of a support cup 194 until the vertical wheels 34 of the console 22 are moved away from this wall, for example, depositing on this wall, at the places normally occupied by the wheels 34, a coating such as a plaster.
• the horizontal railings will be fixed on intermediate loops of the external strap parallel to the wall M and the corresponding floor.
• Figures 42 to 52 refer to the installation of scaffolding at another facade wall defining a dihedral angle, preferably 90 °, with the facade wall to which has already been installed scaffolding similar to that described with reference in Figures 1 to 10.
• FIG. 42 shows that the two front walls M1, M2 have at their upper part a horizontal row of spaced anchoring studs 1, identical to those shown in FIGS. 1 to 5, and preexisting by construction.
• FIG. 43 shows a scaffolding installed on the front wall Ml in the manner already explained with reference to FIGS. 1 to 10.
• two successive horizontal scaffolding floors 29 are placed on their respective consoles 22 which are each hung on a bracket 2 , of which only one is visible, itself attached to its corresponding anchor stud 1.
• Each console 22 shown in FIG. 43 has some structural differences compared to the consoles described above.
• the upright 30 of the console 22 supports at its lower end a single vertical wheel 34 and its upper end comprises, as is better visible in FIG.
• the attachment box 21 is fixed by welding to two side plates 30a also fixed by welding to the upper end of the upright 30 and between which are fixed two parallel axes 30b allowing the passage of an operating cord 15 wound on the pulley 10 of the bracket 2 to allow the attachment of the console 22 to the anchor pin 20.
• the wheel 34 is further fixed to the end of the support leg portion 32 which can slide to a selectively adjustable position in a sleeve 30c secured by welding to the lower end of the upright 30.
• the leg 32 can thus be fixed relative to the upright 30 in a selectively adjustable transverse position and blocked to it for example by a bolt.
• the console 22 includes a reinforcement upright 30e parallel to the upright 30 and extending between the cross-member 26 and the diagonal reinforcing leg 31.
• a corner support 200 intended to cover the salient angle formed by the two front walls Ml, M2 and comprising two rigid plates 201 , 202 forming a dihedral, preferably at a right angle, and respectively comprising two elongated slots of the same length 203, parallel to the common edge of the two plates 201, 202 and open at their lower ends when considering FIG. 45.
• These two slots 203 allow the angle support 200 to be fixed to two anchoring pins adjacent to the two front walls Ml, M2 respectively by engaging each slot 203 on the leg lb of the corresponding anchoring stud 1.
• the angle support 200 comprises a anchor stud 204, identical to stud 1, and the leg of which is fixed by welding to the upper part of the edge common to the two rigid plates 201, 202.
• Each plate 201, 202 comprises two parts 201a, 201b; 202a, 202b assembled to each other by bolts 205 passing through oblong holes 206 of these two parts, perpendicular to the common edge of the two plates 201, 202, to allow adjustment of the relative position of the two parts 201a, 201b; 202a, 202b.
• the two parts 201b, 202b constitute the same part defining the dihedral angle and to which the two plate parts 201a, 202a are related respectively.
• the angle support 200 finally comprises an operating handle 207.
• an operator located on the floor 29 of this scaffolding hooks the angle support 200 to the two neighboring pitons 1 situated at the same level on both sides. other of the edge common to the two front walls Ml, M2 by engaging the two slots 203 respectively on the two legs lb of these anchoring pins so that the angle support 200 covers the corresponding part of the projecting angle formed by these two walls.
• the leg 1b of the anchor bolt 1 to which the end bracket 2 of the scaffolding of the wall Ml is hung has sufficient space between the attachment housing 16 of the bracket and the plate 1 of the bolt 1 for allow the passage and the attachment of the plate 231.
• FIG. 47 which also shows that the bracket 2 has a flexible link 15, such as a rope, wound on its pulley 10.
• the bracket 2 is shown as having a structure identical to that of the bracket 2 shown in FIG. 5.
• FIG. 48 shows that a corner console 22, of general structure identical to the console 22 of Figures 43 and 44, is hooked by its housing 21 to the anchor bolt 20 of the angle bracket 2 after having been raised using the cord 15, one end of which is fixed to the corresponding end of the cross member 26 in passing around the pulley 10 of the bracket 2 and on a pulley 30f rotatably mounted between the two side plates 30a secured to the end of the upright 30 of the console 22.
• the latter comprises at the lower end of its upright 30 two wheels vertical 34 defining between them an angle corresponding to the projecting angle of the two walls Ml, M2 so as to roll respectively along these two walls when the angle console 22 is raised to its position of attachment to the angle bracket 2.
• Each wheel 34 is mounted on the upright 30 in an identical manner to the wheel 34 of the console 22 of FIGS. 43 and 44 with the two parts forming legs 32 for supporting these two wheels forming an angle identical to the salient angle of the two walls s Ml, M2 and each carrying the wheel 34 whose plane is perpendicular to the corresponding leg portion.
• the angle bracket 22 is thus mounted so that its crosspiece 26 projects from the edge common to the two walls Ml, M2, constituting approximately a bisector of the angle formed by these two walls.
• FIG. 49 shows that a corner scaffolding floor 29 generally in the shape of a rectangular trapezium has been placed on the end console of the scaffolding installed on the wall M1 and the corner console 22.
• This figure also shows that an operator located on the ground has hooked, using the pole 3, which can be telescopic, a second pulley bracket 2 to the anchor bolt 1 to which the angle support 20C is hung.
• the gallows 2 may be identical to the gallows 2 described in the first embodiment, but may have another structure which will be described later.
• FIG. 50 shows that a second console 22, identical to the angle console 22, except that the two vertical wheels 34 intended to roll along the wall of M2 facade are supported at the lower end of the upright 30 by a transverse bar 33 like the console 22 of the first embodiment, has been hooked by its attachment box 21 to the anchoring stud 1 projecting from the angle support 200, in the manner already explained previously.
• the operator located on the first corner scaffolding floor 29, places a second corner scaffolding floor 29, generally in the form of a rectangular trapezoid, on the corner console 22 and the second console 22 attached to the M2 wall, as shown in Figure 51.
• FIG. 52 shows that a third console 22, identical to the second console 22 attached to the wall M2, is connected to one end of the rope 15 wound on the pulley 10 of the bracket 2 and that a rectangular scaffolding floor 29 is hooked to the cross member 26 of the third console 22.
• the opposite end of the scaffolding floor 29 is fixed to the end of another rope 15 whose opposite end is grasped by the operator located on the second corner scaffolding floor 29.
• Figures 53 and 54 show another embodiment of a bracket 2 which can replace the brackets 2 attached to the anchoring studs of the facade wall M2 and which can also be removed from these anchoring studs once the second and third brackets 22 are hooked to the anchoring studs, with the aim of reusing these brackets for the installation of another scaffolding floor which can extend the scaffolding already installed on the M2 facade wall.
• bracket 2 of Figures 53 and 54 identical and performing the same function as those of the brackets 2 shown in particular in Figure 5 bear the same references and will therefore not be described again.
• the upright 4 of the bracket 2 in the form of a flat metal bar comprises a lateral notch 4a configured so as to allow the hooking of the bracket 2 to an anchoring stud 1 and the manual removal of the bracket 2 of this stud after hooking a console 22 to this anchor stud via the hooking box 21 secured to this console.
• the notch 4a is cut in the upright 4 having a recessed part 4al of a height greater than the height of the leg lb of the anchoring stud so as to allow the introduction of the leg lb into 1 ' indentation 4a and a groove 4a2 extending longitudinally to the upright 4 so that a downward movement of the pole 3 to which the bracket 2 is attached causes the introduction of at least part, if not all, of the leg lb of the piton 1 in the groove 4a2 as shown in FIG. 54.
• the leg lb of the piton 1 can have a notch (not shown) in which the bottom of the groove 4a2 can engage to lock the stem in position vertical.
• the hollowed-out part 4al is extended opposite the groove 4a2 by a ramp 4a3 making it possible to guide the introduction of the leg 1b of the peak 1 into the groove 4a2. It is understood that when a console 22 is attached to the anchoring stud 1 of the wall of M2 facade, the space existing between the mounting plate of the bolt 1 to the M2 wall and the attachment box of this console is sufficient to then allow the removal of the bracket 2 from the anchoring bolt 1 by manually exerting on the bracket 2 an effort following the arrow FI as indicated in FIG. 54.
• Figure 55 shows an embodiment of a railing post 210 which can be raised in the manner of a console as described above to be hung on an anchoring stud 1 of a front wall so as to constitute with other guardrail posts fixed to anchoring pegs in the same row, means of protection of people on the shore, for example, of the roof T of a building as shown in Figure 56.
• the guardrail post 210 comprises a rigid upright 211, made for example of a section with a square section, comprising at its lower end a sleeve 212 perpendicular to the upright 211 and in which a bar 213 carrying the l 'one of its ends a transverse bar 214 for supporting two vertical wheels 215 allowing the post 210 to move vertically along the facade wall.
• the bar 213 has through holes 216 allowing the passage of a bolt 217 for fixing the bar 213 to the sleeve 212 at a determined relative position.
• the upright 211 supports, at about a third of its length from its lower end, a housing 218 allowing the pole 210 to be hooked to a wall anchoring stud 1.
• the hanging box 218 is identical to the housing hooking 21 of a scaffolding console 22 and will therefore not be described again.
• the attachment box 218 is fixed, for example by welding, to the ends of two lugs forming a fixing end piece 219 which can slide respectively in two slides 220 in the form of a tube of rectangular section secured to one another, for example by welding, on each side of the upright 211 perpendicular to it.
• the two legs 219 have holes in facing 221 which can be traversed by a bolt 222 also passing through the two slides 220 so as to fix the two legs 219 at a predetermined relative position in correspondence with the relative position of the wheels 215 for allow the housing 218 to be hooked to the corresponding anchoring stud 1.
• An axis 223 is fixed transversely between the two lugs 219 near the hooking housing 218 and allows the end of a flexible manipulation link to be fixed, such as a rope (not shown). Alternatively, the end of the flexible link can be fixed to a stirrup secured to the two tabs 219 forming a nozzle.
• the post 210 includes a series of L-shaped hooking means 224 whose legs are fixed, for example by welding, to the post 211 to allow the installation of protective elements, such as for example boards 'extending horizontally from one post to another when these are fixed to their respective anchoring studs.
• the wheels 215, the attachment box 218 and the L-shaped attachment means 224 are located on the same side of the upright 211 of the post 210.
• each railing post 210 is carried out in the manner for example of the third console 22 in FIG. 52.
• the operator firstly hooks to an anchoring stud 1 of the front wall M a removable bracket 2 as described above in connection with FIGS. 53 and 54.
• the operator pulls on the end opposite of the rope, which is wound on the pulley of the removable bracket 2, to raise the pole 210 until the bracket 2 allows the housing 218 to be hooked to the anchoring stud 1.
• the operator can then hang a succession of parallel guardrail posts 210 respectively to the anchoring studs of the same row to obtain a configuration similar to that shown in FIG. 56 which shows that the guard posts bodies protrude above a roof T to allow the installation of protective boards in the L-shaped fastening means 224.
• the brackets 2 having served for the fastening of the railing posts 210 can be removed for future use.
• Figures 57 to 60 show another embodiment of a collapsible scaffolding floor.
• This floor 230 comprises a platform 231 with an access hatch 232 and three railing barriers respectively a longitudinal barrier 233 and two lateral barriers 234 which can be folded down by pivoting on the platform 231 so as to occupy an inactive stowed position represented in FIG. 57.
• This figure shows that the two lateral barriers 234 are folded down directly on the platform 231 while the longitudinal barrier 233 is folded above the two lateral barriers 234.
• the platform 231 comprises two vertical hollow feet 235 secured to the platform at the two corners of the latter on the same side of its length. The two feet 235 can respectively receive the two lower end portions of two uprights 236 of the longitudinal barrier 233 so as to maintain the barrier in a vertical position.
• each upright 236 has a transverse axis 237 projecting from either side of the upright and engaging respectively in two oblong holes 238 parallel to the corresponding foot 235 and produced through the two side walls of this foot perpendicular to the longitudinal axis of the platform 231.
• each foot 235 has at least part of its side wall parallel to the longitudinal axis of the platform and situated towards this hollow axis - so that '' by exerting a tensile force directed upwards on the longitudinal barrier 233, the two uprights 236 move relative to the feet 235 to an upper retaining position at which the pins 237 abut at the upper ends of the oblong holes 238 and, by pivoting the barrier 233 around the axes 237 anti-clockwise, the barrier 233 can be folded down towards the platform 231.
• Each lateral barrier 234 is articulated, by one of its uprights 239, to the corresponding upright 236 of the longitudinal barrier 233 so as to pivot about a vertical axis between a folded position against the longitudinal barrier 233 and a vertical service position substantially perpendicular to this barrier and to which it can be blocked by unlockable locking means (not shown).
• each lateral barrier 234 may comprise two parts 234a and 234b mounted to slide telescopically into one another as is clearly seen in FIGS. 59 and 60.
• the platform 231 is fixed at its two ends respectively on two crosspieces 26 of two bracket brackets 22 via articulation axes 240 allowing the pivoting of each bracket bracket 22 between an inactive position fully folded under the platform 231 ( Figure 57) and an active position perpendicular to this platform ( Figures 58-60).
• Each console 22 has its attachment box 21 to a wall anchoring stud fixed to the end of a nozzle 25 like the console 22 of the first embodiment.
• the platform 231 has at each of its ends two chaps 241 projecting under the platform 231 in the direction of the width of the latter and supporting the two axes 240 of pivoting of the corresponding console 22, these axes being arranged coaxially and perpendicular to the longitudinal axis of the platform 231.
• the installation process of the scaffolding 230 is carried out as follows.
• the operator hooks the end of a rope to each end piece 25 of the console 22 as already shown in FIG. 10. Then, the operator deploys the two consoles 22 from their inactive position to their perpendicular active position to platform 231 as shown in FIG. 58. Then, the operator pivots the barrier 233 and the barrier 234 folded against the barrier 233 and pushes the parts of the lower ends of the two uprights 236 of the barrier 233 into the fixing feet 235 as shown in FIG. 59. The operator then grasps each lateral barrier 234 to rotate it to the position perpendicular to the barrier 233 as shown in FIG. 60. Two operators are then required to pull the two lifting ropes from the scaffolding floor of FIG.
• FIG. 61 represents a scaffolding installed on the wall M of a facade and comprising two scaffolding floors 300 extending the scaffolding floor 29 and arranged so as to hold c takes into account differences in distance that may exist between anchor bolts in the same row.
• Each scaffolding floor 300 is made from a sheet of flat sheet metal 301 constituting the bottom of the floor and the two longitudinal edges of which are folded down to form longitudinal stiffening fins 3C2.
• each folded edge includes a first fin 302 folded 90 ° below the bottom 301 of the floor 300 and a second fin 302 folded 90 ° above this bottom so that the end portion of the floor 300 comprising the fins 302 folded upwards can rest directly on the corresponding end part of the scaffolding floor 29 or on the corresponding end part of another floor 300.
• Each floor 300 also has its end edge opposite the fins 302 folded upwards also folded downwards at 90 ° to form a fin 303 for transverse stiffening.
• To this fin 303 are fixed, for example by welding, two hooks 304 which can be attached to the cross member 26 of a square bracket 22 of the kind shown in particular in FIG. 10.
• the scaffolding floor 29 was first installed on the wall M in the manner already described with reference to FIGS. 1 to 10. Then, the first scaffolding floor 300 is installed as an extension of the floor 29 using either the method described in particular in Figures 14 to 18, or the process described with reference to Figure 52. Then, the floor 300 is hooked by its two hooks 304 to the crosspiece 26 of the console 22 opposite the floor 29 and rests by its part end opposite to the hooks 304 directly on the corresponding end part of the floor 29. Each floor 300 has a predetermined length taking into account the differences in distance that may appear between successive peaks of the same row.
• the floor 300 can have a length of 3.2 meters so that it rests on the floor 29 from a distance of about 0.30 meters.
• the distance d3 between the two anchoring pins of the second floor 300 is 2.50 meters, the second floor 300 would rest directly on the first floor 300 from a distance of about 0.70 meters.
• each floor 300 is advantageously light since it is produced from a relatively thin and sufficiently rigid sheet metal sheet by the presence of the stiffening fins 302 and 303.
• the fins 302 can be reinforced by two lateral beams (not shown) forming an elongated S.
• the fin 303 can be reinforced by a crosspiece attached to the fin.
• the suspended scaffolding system of the invention allows one or two people on the ground to assemble the different scaffolding elements without difficulty particular, these scaffolding elements being of a relatively simple structure unlike those of the suspended scaffolding systems known until now.

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

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• 1997
  • 1997-10-31 FR FR9713731A patent/FR2770554B1/fr not_active Expired - Lifetime
• 1998
  • 1998-10-29 EP EP98952815A patent/EP1027512A1/de not_active Withdrawn
  • 1998-10-29 WO PCT/FR1998/002319 patent/WO1999023329A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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