WO1995004202A1 - Method for placing forms for a staircase, particularly a curved staircase, and resulting formwork - Google Patents

Method for placing forms for a staircase, particularly a curved staircase, and resulting formwork Download PDF

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Publication number
WO1995004202A1
WO1995004202A1 PCT/CH1994/000158 CH9400158W WO9504202A1 WO 1995004202 A1 WO1995004202 A1 WO 1995004202A1 CH 9400158 W CH9400158 W CH 9400158W WO 9504202 A1 WO9504202 A1 WO 9504202A1
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WO
WIPO (PCT)
Prior art keywords
formwork
bench
support members
synthetic material
longitudinal
Prior art date
Application number
PCT/CH1994/000158
Other languages
French (fr)
Inventor
Olivier Caverzasio
Jean-Pierre Rihs
Original Assignee
Olivier Caverzasio
Rihs Jean Pierre
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olivier Caverzasio, Rihs Jean Pierre filed Critical Olivier Caverzasio
Priority to DE69401910T priority Critical patent/DE69401910T2/en
Priority to EP94921565A priority patent/EP0663038B1/en
Publication of WO1995004202A1 publication Critical patent/WO1995004202A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/10—Forming or shuttering elements for general use with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air
    • 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
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • 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
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • E04G13/062—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall for stairs or steps
    • 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
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G9/05—Forming boards or similar elements the form surface being of plastics

Definitions

  • the present invention relates to a method for producing a stair formwork, in particular a spiral staircase, this formwork comprising a lower element called a bench top and upper elements called formwork of the steps.
  • finishing layer which is made with a smoothing coating, is delicate and risks being damaged during the installation of the frame and upper elements.
  • the present invention proposes to overcome these drawbacks by proposing a formwork method and a formwork produced according to this method, which make it possible to quickly form a spiral staircase by easily adapting to all forms of staircase, to reuse this formwork when it involves making several similar staircases, and in all cases ensuring an exceptional quality of finish while avoiding the use of highly specialized labor and resorting to the use of lifting gear oversized and expensive.
  • the horizontal support members arranged to support the said bench are mounted on the walls of the stairwell.
  • support members being made up of longitudinal telescopic tubular crosspieces, in that the benchtop consisting of at least one plate of synthetic material is placed on said support members, in that panels are fixed to form the formwork of the steps, and in that one puts in place a metal frame having at least longitudinal reinforcing bars arranged substantially parallel to the surface of said bench.
  • the synthetic material used is preferably a polyester resin reinforced with fibers or a multilayer material.
  • At least one face of said synthetic material is applied to at least one layer of a polymerizable substance and / or a film of a smooth synthetic material.
  • the horizontal support members arranged to support said bench are made up of telescopic longitudinal and transverse tubular crosspieces, said benchtop is formed by placing at least one deformable lattice on said crosspieces, by putting in place on said lattice a precut sheet of thermoformable synthetic material and by applying said sheet of synthetic material on the lattice by heating, panels are fixed to form the formwork of the steps, and a frame is put in place metal comprising at least longitudinal reinforcing bars arranged substantially parallel to the surface of said bench.
  • thermoformable synthetic material is preferably a cellular foam, and hinged trellis elements are preferably used to form said deformable trellis.
  • the said assemblies are mounted horizontal support members by fixing on at least one wall of the stairwell wall fixing elements arranged to each receive one end of said longitudinal telescopic tubular sleepers of the support members.
  • each telescopic tubular cross member can be equipped with at least one coupling element arranged to connect it in a mobile manner to another cross member.
  • the formwork obtained according to the method of the invention is characterized in that it comprises horizontal support members arranged to support said bench-top consisting of at least one plate of synthetic material, these support members comprising longitudinal telescopic tubular crosspieces , means for fixing said support members to the walls of the stairwell, panels for forming the formwork of the steps as well as means for fixing these panels.
  • each crosspiece comprises a central telescopic rod and at least one ball-shaped head fixed to at least one end of said central rod.
  • the bench which can be reused, comprises several juxtaposed and assembled sections, made of a rigid synthetic material.
  • the benchtop which cannot be reused, comprises a deformable mesh and a sheet of thermoformable synthetic material.
  • the bench support members further comprise transverse telescopic tubular crosspieces arranged to ensure the transverse coupling of at least two longitudinal crosspieces, and each crosspiece is provided with at least one coupling element. agency to receive at least one head from at least one other crosspiece.
  • said support members comprise wall fastening elements consisting of a fixing plate and a socket for receiving a head of one of said longitudinal crosspieces.
  • FIG. 1 represents a partial perspective view illustrating a first embodiment of a lower formwork element for a spiral staircase of the "half-round" type
  • FIG. 2 represents a partial sectional view illustrating an embodiment of the lower formwork element of FIG. 1 for a spiral staircase without a central core
  • FIG. 3 represents a cross-sectional view of an embodiment of the bench used in the formwork of FIGS. 1 and 2,
  • the figure represents a sectional view illustrating a method of assembling two sections of the benchtop of FIG. 3,
  • FIG. 5 represents a partial perspective view illustrating a second embodiment of a lower formwork element according to the invention of a spiral staircase
  • FIG. 6 represents a partial view from below of the support members of the embodiment of FIG. 5,
  • FIG. 7 represents a partially sectional view of a telescopic tubular cross member of the support members
  • FIG. 8 represents a detailed view of a coupling element of the support members illustrated in FIG. 5, and FIG. 9 represents a sectional view of a preferred method of fixing the support members of the formwork of FIG. 5,
  • the formwork as illustrated is intended for a spiral staircase of the half-round type and is made so that it can be dismantled and reused for the realization of other similar staircases. It consists of a lower element, formed from a bench 10 supported by support members 16, and standard upper elements (not shown) called formwork of counter steps and serving to delimit said counter steps.
  • the upper surface of the bench 10 corresponds to the lower surface of the finished staircase. As such, it is the quality of the finish of this upper surface on which the quality of the finish of the lower surface of the staircase will depend.
  • the bench 10 is advantageously made of several sections 10a, 10b,. . . which are juxtaposed and clamped against each other by suitable assembly means described in more detail below, to form an apparently continuous assembly. Joints can be chewed or filled with a suitable substance.
  • the central core ⁇ is a substantially flat wall ending in a rounded flank 15, but this core can also be circular or have any profile.
  • this type of formwork it is also possible to use this type of formwork in an open stairwell. In this case, the elements must be fixed to supports reconstituting a fictitious stairwell or be mounted on props.
  • the lower element is fixed to the side walls of the stairwell and to a central core.
  • the support members 16 of the bench 10 consist of longitudinal telescopic tubular sleepers 18, substantially horizontal and more or less spaced depending on the size of the staircase to be made, associated at each of their ends with fastening elements 19-
  • these crosspieces comprise at each of their ends a ball head 20 and are, in places, supported on props adjustable verticals 17-
  • the ball head 20 of one end of the crosspieces 18 is engaged in a socket 22 of the fastening means 19 of said crosspieces to the wall.
  • This socket 22 is associated with a plate 23 disposed below the formwork of the bench. This plate is fixed to the wall by two screws 24. After formwork removal, the screw holes 24 should be plugged.
  • the crosspieces 18 comprise at one of their ends a ball head 20 intended to cooperate with the means of attachment 19 to the wall of the stairwell and to their other end of a perforated head 21.
  • This perforated head is arranged to engage in a pin carried by an arm 80 which constitutes a guide for a stringer 81 serving to then put in place the shuttering formwork panels.
  • the stays 17, which carry the entire formwork, are adjustable in height and provided with a ball head 25, engaged in a cavity of a socket 26 integral with each cross member 18 so that the surface defined by the support members perfectly matches the shape of the bench.
  • the bench 10 which constitutes the finishing element and on which the concrete will ultimately be poured, is placed on the support members 16 after their installation.
  • This bench shown in section in Figure 3, consists for example of a central plate 30 of a cellular synthetic material coated with two layers 31 and 32 of a polymerized substance such as polyester resin reinforced with glass fibers or carbon fiber applied on both sides of this plate 30.
  • a polymerized substance such as polyester resin reinforced with glass fibers or carbon fiber applied on both sides of this plate 30.
  • an impregnation film 33 intended to facilitate the formwork.
  • each section is provided on its underside with a section of square or bent section, as shown in FIG. 4.
  • the two bent sections 41 and 42, respectively integral with the sections 10a, 10b of the bench, are tightened against each other by means of clamping screws 43.
  • a flexible seal 44 is interposed for mounting between the two sections to ensure sealing.
  • each section is also equipped on its lower face with a slide 27 (FIG. 2) in which a cross member 18 is threaded during assembly, this slide being provided with the bush 26 arranged to receive the ball head 25 of the was 17-
  • FIG. 5 Another embodiment of the formwork according to the invention is illustrated in FIG. 5.
  • This type of formwork makes it possible to quickly build a staircase of unique and varied shape with an excellent quality of finish. In this embodiment, the bench cannot be reused.
  • the support members 116 are produced in the form of a support mesh for the benchtop 110, which has all the required resistance characteristics and which allows adaptation to all forms of stairwells and staircases.
  • these bodies consist of crosspieces longitudinal 118 and transverse 118 '.
  • These cross members illustrated in more detail in FIG. 7, comprise a central rod 170 composed of two tubes 171 and 172 mounted telescopically and which carry at one of their ends each a head 158 in the form of a ball joint.
  • the crosspieces 118 ′ are arranged to connect the longitudinal crosspieces 118 in a mobile manner. To do this, the said crosspieces 118 are fitted with coupling elements 190 as shown in FIG. 8.
  • Each of these elements is designed to receive the ball heads 158 'of two transverse crosspieces 118'.
  • these coupling elements 190 comprise two lateral sockets 200 receiving the ball heads and a flange 201 which is placed on the central rod of the crosspiece.
  • the bench 110 made on these support members 116 consists of a deformable lattice 120 in order to obtain the required shape of the bench and a sheet 121 of a flexible thermoformable synthetic material.
  • the trellis 120 is advantageously constituted by an articulated grid which is suitable for warping. It is held in place on the support members 116 by clamps (not shown) or any other similar fixing means. It can also consist of several grids. In the absence of grids, a simple formwork lattice of the mechanically welded type is perfectly suitable.
  • the sheet 121 of synthetic material applied to the trellis 120 is precut using a template in a flat plate of thermoformable cellular foam or any other similar flexible thermoformable synthetic material. It is then applied to the mesh 120 and shaped by a current of hot air.
  • FIG. 9 represents a partial sectional view which illustrates the preferred method of positioning the horizontal support members 116 of the bench 110.
  • the crosspieces used lend themselves to the mounting of a formwork for a stairwell made up of side walls and a central column or wall on which one can fix the wall fixing means 119-
  • These fixing means 119 advantageously consist of a fixing plate 150, fixed to the wall by means of a recessed plug 151 and a screw 152, and which carries a fixed nut 153 intended to receive a bolt 154 ensuring the connection with a cross member 118.
  • This bolt 154 is housed in a tubular bush 155 secured to a plate 156 carrying a fixed bush 157 provided with an open cavity intended to accommodate the end head 158 in the form of a ball joint of the cross member 118.
  • the nut 153 is provided with an upper housing 60 arranged to receive the transverse bars.
  • the wall fixing elements 119 will be embedded in the concrete and only openings for the passage of the tubular sockets 155 and the bolts 154 will remain visible when the staircase is exposed.
  • other wall fixing means can be provided which can be recovered during formwork removal.
  • the shape of the components can be changed somewhat as required.
  • the lower surface of the supporting element can be tinted or structured since it will remain permanently as a decorative element under the finished staircase.
  • This formwork process can also be used for a "free" staircase, that is to say not located in a stairwell, by using two stringer bars for guiding the formwork and by equipping the support members with two props vertical by cross.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Steps, Ramps, And Handrails (AREA)
  • Handcart (AREA)

Abstract

Formwork for rapidly placing forms for a curved staircase of any shape giving an exceptional finish, including a lower member or base and upper members or riser forms. The formwork further comprises horizontal supporting members (16) for supporting said base (10) made of at least one plate of synthetic material. Said supporting members consist of longitudinal telescoping tubular cross-members (18), assemblies (19) for attaching the supporting members to the walls (12, 13) of the stairwell, panels for forming the riser forms and assemblies for attaching said panels. The base (10) may be prepared in advance in a workshop, delivered in a number of sections (10a, 10b, ...) and reused for producing a number of similar staircases.

Description

PROCEDE DE COFFRAGE D'UN ESCALIER, NOTAMMENT D'UN ESCALIER TOURNANT ET COFFRAGE REALISE SELON CE PROCEDEMETHOD OF FORMWORK OF A STAIRCASE, PARTICULARLY OF A TURNING STAIRCASE AND FORMWORK CARRIED OUT ACCORDING TO THIS PROCESS
La présente invention concerne un procédé de réalisation d'un coffrage d'escalier, notamment d'un escalier tournant, ce coffrage comprenant un élément inférieur appelé paillasse et des éléments supérieurs appelés coffrages des contre-marches .The present invention relates to a method for producing a stair formwork, in particular a spiral staircase, this formwork comprising a lower element called a bench top and upper elements called formwork of the steps.
Elle concerne également le coffrage pour la mise en oeuvre de ce procédé.It also relates to the formwork for the implementation of this process.
La réalisation d'un coffrage pour un escalier tournant représente actuellement une tâche longue et fastidieuse, surtout lorsque cette tâche est répétitive. On procède tout d'abord à un traçage au sol puis au relevé des cotes verticales le long des parois latérales de la cage de l'escalier. Ensuite, on réalise l'élément inférieur porteur au moyen de segments de planches qui en constituent le support de la paillasse. Lorsque ce support est solidement arrimé, on effectue un premier remplissage-lissage au moyen d'un enduit quelconque qui peut être à base de ciment, de chaux, de plâtre etc. . Sur la couche de remplissage on applique ensuite une couche de finition lisse. La qualité de finition* de la surface inférieure de l'escalier dépend de l'état de finition de cette dernière couche. Après la mise en place de l'armature métallique requise et la fixation des éléments supérieurs délimitant les contre-marches, le béton peut être coulé.Creating formwork for a spiral staircase is currently a long and tedious task, especially when this task is repetitive. We first proceed with a tracing on the ground then with the reading of the vertical dimensions along the side walls of the stairwell. Then, the lower carrying element is produced by means of plank segments which constitute the support for the bench. When this support is securely stowed, a first filling-smoothing operation is carried out using any coating which may be based on cement, lime, plaster, etc. . A smooth top coat is then applied to the filling layer. The quality of finish * of the lower surface of the staircase depends on the state of finish of this last layer. After placing the required metal reinforcement and fixing the upper elements delimiting the steps, the concrete can be poured.
Les différentes étapes de préparation et de montage de ce coffrage sont très longues et nécessitent l'intervention de spécialistes expérimentés. En outre, si dans un même bâtiment plusieurs appartements sont prévus avec le même escalier, les opérations de coffrage de ces escaliers sont systématiquement à refaire. Il n'est généralement pas possible de récupérer une partie ou la totalité de l' un de ces coffrages pour la réutiliser par la suite.The various stages of preparation and assembly of this formwork are very long and require the intervention of experienced specialists. In addition, if in the same building several apartments are provided with the same staircase, the formwork operations of these stairs are systematically to be redone. It is generally not possible to recover part or all of one of these forms for later reuse.
Enfin la dernière couche de finition, qui est faite avec un enduit de lissage, est délicate et risque d'être endommagée lors de la pose de l'armature et des éléments supérieurs .Finally the last finishing layer, which is made with a smoothing coating, is delicate and risks being damaged during the installation of the frame and upper elements.
Pour toutes ces raisons , le prix de revient d' un coffrage d'escalier tournant est très élevé. On pourrait contourner partiellement ce problème en posant un escalier préfabriqué. Cependant la réalisation d'escaliers de ce type nécessite également la réalisation d'un coffrage ou moule relativement coûteux, généralement en tôle. Il est certain que le coût d'un tel moule peut être réduit à condition qu'on envisage la construction de plusieurs escaliers identiques .For all these reasons, the cost price of a spiral staircase formwork is very high. We could partially circumvent this problem by installing a prefabricated staircase. However, the production of stairs of this type also requires the production of a relatively expensive formwork or mold, generally made of sheet metal. It is certain that the cost of such a mold can be reduced provided that consideration is given to the construction of several identical staircases.
Malheureusement, dans ce cas il convient d'ajouter au coût de construction de l'escalier proprement dit le prix de la pose et du transport, qui est très élevé. En effet, un tel escalier pèse entre deux et trois tonnes et nécessite des engins de manutention lourds . Lors de la construction d'un immeuble, les frais d'immobilisation d'une grue ont une incidence non négligeable sur le prix de cette construction. Pour la manutention de la plupart des matériaux de construction une grue standard de petite dimension suffit amplement. Cependant, lorsqu'il s'agit de prévoir la pose d'un escalier préfabriqué de plusieurs tonnes, une telle grue est insuffisante et il devient nécessaire de prévoir une grue adaptée à ce travail particulier. Le coût de la construction dans son ensemble se trouve de ce fait très forteriïent augmenté.Unfortunately, in this case it is necessary to add to the cost of construction of the staircase itself the price of installation and transport, which is very high. Indeed, such a staircase weighs between two and three tonnes and requires heavy handling equipment. During the construction of a building, the costs of immobilizing a crane have a significant impact on the price of this construction. For the handling of most construction materials, a standard small crane is more than enough. However, when it comes to providing for the installation of a prefabricated staircase weighing several tonnes, such a crane is insufficient and it becomes necessary to provide a crane suitable for this particular job. The cost of construction as a whole is therefore greatly increased.
La présente invention se propose de pallier ces inconvénients en proposant un procédé de coffrage et un coffrage réalisé selon ce procédé, qui permettent de coffrer rapidement un escalier tournant en s' adaptant facilement à toutes les formes d'escalier, de réutiliser ce coffrage lorsqu'il s'agit de réaliser plusieurs escaliers similaires, et d'assurer dans tous le cas une qualité de finition exceptionnelle tout en évitant de faire appel à une main-d'oeuvre hautement spécialisée et de recourir à l'emploi d'engins de levage surdimensionnés et coûteux.The present invention proposes to overcome these drawbacks by proposing a formwork method and a formwork produced according to this method, which make it possible to quickly form a spiral staircase by easily adapting to all forms of staircase, to reuse this formwork when it involves making several similar staircases, and in all cases ensuring an exceptional quality of finish while avoiding the use of highly specialized labor and resorting to the use of lifting gear oversized and expensive.
Ces buts sont atteints par le procédé selon l'invention, caractérisé en ce que l'on monte sur les parois de la cage de l'escalier des organes de support horizontaux agencés pour soutenir ladite paillasse, ces organes de support étant constitués de traverses tubulaires télescopiques longitudinales , en ce que l'on pose la paillasse constituée d'au moins une plaque d'un matériau synthétique sur lesdits organes de support, en ce que l'on fixe des panneaux pour former les coffrages des contre-marches, et en ce que l'on met en place une armature métallique comportant au moins des barreaux d'armature longitudinaux disposés sensiblement parallèlement à la surface de ladite paillasse.These objects are achieved by the method according to the invention, characterized in that the horizontal support members arranged to support the said bench are mounted on the walls of the stairwell. support members being made up of longitudinal telescopic tubular crosspieces, in that the benchtop consisting of at least one plate of synthetic material is placed on said support members, in that panels are fixed to form the formwork of the steps, and in that one puts in place a metal frame having at least longitudinal reinforcing bars arranged substantially parallel to the surface of said bench.
Pour que la paillasse obtenue soit rigide et puisse préalablement être réalisée et divisée en plusieurs tronçons , le matériau synthétique utilisé est de préférence une résine polyester armée de fibres ou un matériau multicouche.So that the benchtop obtained is rigid and can be produced beforehand and divided into several sections, the synthetic material used is preferably a polyester resin reinforced with fibers or a multilayer material.
Afin de faciliter le décoffrage, dans le mode de réalisation préféré du procédé, l'on applique sur au moins une face dudit matériau synthétique au moins une couche d'une substance polymérisable et/ou un film d'une matière synthétique lisse.In order to facilitate stripping, in the preferred embodiment of the method, at least one face of said synthetic material is applied to at least one layer of a polymerizable substance and / or a film of a smooth synthetic material.
Dans une deuxième forme de réalisation du procédé, les organes de support horizontaux agencés pour soutenir ladite paillasse sont constitués de traverses tubulaires télescopiques longitudinales et transversales, l'on forme ladite paillasse en posant au moins un treillis déformable sur lesdites traverses, en mettant en place sur ledit treillis une feuille prédécoupée d'un matériau synthétique thermoformable et en appliquant ladite feuille de matériau synthétique sur le treillis par chauffage, l'on fixe des panneaux pour former les coffrages des contre-marches , et l'on met en place une armature métallique comportant au moins des barreaux d'armature longitudinaux disposés sensiblement parallèlement à la surface de ladite paillasse.In a second embodiment of the method, the horizontal support members arranged to support said bench are made up of telescopic longitudinal and transverse tubular crosspieces, said benchtop is formed by placing at least one deformable lattice on said crosspieces, by putting in place on said lattice a precut sheet of thermoformable synthetic material and by applying said sheet of synthetic material on the lattice by heating, panels are fixed to form the formwork of the steps, and a frame is put in place metal comprising at least longitudinal reinforcing bars arranged substantially parallel to the surface of said bench.
Dans ce deuxième mode de réalisation le matériau synthétique thermoformable est de préférence une mousse cellulaire et l'on utilise de préférence des éléments de treillis articulés pour constituer ledit treillis déformable.In this second embodiment, the thermoformable synthetic material is preferably a cellular foam, and hinged trellis elements are preferably used to form said deformable trellis.
Dans toutes les formes de réalisation du procédé, l'on monte lesdits organes de support horizontaux en fixant sur au moins un mur de la cage de l' escalier des éléments de fixation murale agencés pour recevoir chacun une extrémité desdites traverses tubulaires télescopiques longitudinales des organes de support.In all embodiments of the method, the said assemblies are mounted horizontal support members by fixing on at least one wall of the stairwell wall fixing elements arranged to each receive one end of said longitudinal telescopic tubular sleepers of the support members.
Dans la deuxième forme de réalisation du procédé , chaque traverse tubulaire télescopique peut être équipée d'au moins un élément d'accouplement agencé pour la relier de façon mobile à une autre traverse.In the second embodiment of the method, each telescopic tubular cross member can be equipped with at least one coupling element arranged to connect it in a mobile manner to another cross member.
Le coffrage obtenu selon le procédé l'invention est caractérisé en ce qu' il comporte des organes de support horizontaux agencés pour soutenir ladite paillasse constituée d'au moins une plaque d' un matériau synthétique, ces organes de support comportant des traverse tubulaires télescopiques longitudinales , des moyens de fixation desdits organes de support aux parois de la cage de l'escalier, des panneaux pour former les coffrages des contre-marches ainsi que des moyens de fixation de ces panneaux .The formwork obtained according to the method of the invention is characterized in that it comprises horizontal support members arranged to support said bench-top consisting of at least one plate of synthetic material, these support members comprising longitudinal telescopic tubular crosspieces , means for fixing said support members to the walls of the stairwell, panels for forming the formwork of the steps as well as means for fixing these panels.
Pour obtenir une adaptation parfaite du coffrage à la cage de l' escalier, chaque traverse comporte une tige télescopique centrale et au moins une tête en forme de rotule fixée à au moins une extrémité de ladite tige centrale.To obtain a perfect adaptation of the formwork to the stairwell, each crosspiece comprises a central telescopic rod and at least one ball-shaped head fixed to at least one end of said central rod.
Dans une première forme de réalisation, la paillasse, qui peut être réutilisée, comporte plusieurs tronçons juxtaposés et assemblés , réalisés en un matériau synthétique rigide.In a first embodiment, the bench, which can be reused, comprises several juxtaposed and assembled sections, made of a rigid synthetic material.
Dans une deuxième forme de réalisation la paillasse, qui ne pourra pas être réutilisée, comporte un treillis déformable et une feuille de matériau synthétique thermoformable.In a second embodiment, the benchtop, which cannot be reused, comprises a deformable mesh and a sheet of thermoformable synthetic material.
Dans une forme de réalisation particulière les organes de support de la paillasse comportent en outre des traverses tubulaires télescopiques transversales agencées pour assurer l'accouplement transversal d'au moins deux traverses longitudinales , et chaque traverse est pourvue d'au moins un élément d'accouplement agencé pour recevoir au moins une tête d'au moins une autre traverse.In a particular embodiment, the bench support members further comprise transverse telescopic tubular crosspieces arranged to ensure the transverse coupling of at least two longitudinal crosspieces, and each crosspiece is provided with at least one coupling element. agency to receive at least one head from at least one other crosspiece.
Selon une forme de réalisation préférée du coffrage, lesdits organes de support comportent des éléments de fixation murale constitués d' une plaque de fixation et d'une douille réceptrice d'une tête d'une desdites traverses longitudinales.According to a preferred embodiment of the formwork, said support members comprise wall fastening elements consisting of a fixing plate and a socket for receiving a head of one of said longitudinal crosspieces.
La présente invention sera mieux comprise en référence à la description d'un exemple de réalisation et aux dessins annexés dans lesquels :The present invention will be better understood with reference to the description of an exemplary embodiment and to the accompanying drawings in which:
la figure 1 représente une vue partielle en perspective illustrant une première forme de réalisation d'un élément inférieur de coffrage d'un escalier tournant du type "demi-rond" ,FIG. 1 represents a partial perspective view illustrating a first embodiment of a lower formwork element for a spiral staircase of the "half-round" type,
la figure 2 représente une vue partielle en coupe illustrant une forme de réalisation de l'élément inférieur de coffrage de la figure 1 pour un escalier tournant sans noyau central,FIG. 2 represents a partial sectional view illustrating an embodiment of the lower formwork element of FIG. 1 for a spiral staircase without a central core,
la figure 3 représente une vue en coupe d'une forme de réalisation de la paillasse utilisée dans le coffrage des figures 1 et 2,FIG. 3 represents a cross-sectional view of an embodiment of the bench used in the formwork of FIGS. 1 and 2,
la figure représente une vue en coupe illustrant un mode d'assemblage de deux tronçons de la paillasse de la figure 3,the figure represents a sectional view illustrating a method of assembling two sections of the benchtop of FIG. 3,
la figure 5 représente une vue partielle en perspective illustrant une deuxième forme de réalisation d'un élément inférieur de coffrage selon l'invention d'un escalier tournant,FIG. 5 represents a partial perspective view illustrating a second embodiment of a lower formwork element according to the invention of a spiral staircase,
la figure 6 représente une vue partielle de dessous des organes de support de la forme de réalisation de la figure 5,FIG. 6 represents a partial view from below of the support members of the embodiment of FIG. 5,
la figure 7 représente une vue partiellement en coupe d'une traverse tubulaire télescopique des organes de support,FIG. 7 represents a partially sectional view of a telescopic tubular cross member of the support members,
la figure 8 représente une vue détaillée d'un élément d'accouplement des organes de support illustrés par la figure 5, et la figure 9 représente une vue en coupe d'un mode de fixation préféré des organes de support du coffrage de la figure 5,FIG. 8 represents a detailed view of a coupling element of the support members illustrated in FIG. 5, and FIG. 9 represents a sectional view of a preferred method of fixing the support members of the formwork of FIG. 5,
En référence aux figures 1 et 2, le coffrage tel qu'illustré est destiné à un escalier tournant du type demi-rond et est réalisé de façon à pouvoir être démonté et réutilisé pour la réalisation d'autres escaliers similaires . Il se compose d'un élément inférieur, formé d'une paillasse 10 supportée par des organes de support 16, et d'éléments supérieurs standards (non représentés) appelés coffrages des contre¬ marches et servant à délimiter lesdites contre-marches . La surface supérieure de la paillasse 10 correspond à la surface inférieure de l'escalier fini. A ce titre, c'est de la qualité de la finition de cette surface supérieure dont dépendra la qualité de la finition de la surface inférieure de l'escalier. La paillasse 10 est avantageusement réalisée en plusieurs tronçons 10a, 10b, . . . qui sont juxtaposés et serrés les uns contre les autres par des moyens d'assemblage appropriés décrits plus en détail ci-dessous, pour former un ensemble apparemment continu. Les jointures peuvent être mastiquées ou remplies d'une substance appropriée.Referring to Figures 1 and 2, the formwork as illustrated is intended for a spiral staircase of the half-round type and is made so that it can be dismantled and reused for the realization of other similar staircases. It consists of a lower element, formed from a bench 10 supported by support members 16, and standard upper elements (not shown) called formwork of counter steps and serving to delimit said counter steps. The upper surface of the bench 10 corresponds to the lower surface of the finished staircase. As such, it is the quality of the finish of this upper surface on which the quality of the finish of the lower surface of the staircase will depend. The bench 10 is advantageously made of several sections 10a, 10b,. . . which are juxtaposed and clamped against each other by suitable assembly means described in more detail below, to form an apparently continuous assembly. Joints can be chewed or filled with a suitable substance.
Ces éléments inférieur et supérieurs sont montés dans la cage d'escalier 11 , entre ses parois latérales 12, 13 et un noyau central 1 . Dans l'exemple représenté, le noyau central \ est une paroi sensiblement plane terminée par un flanc arrondi 15, mais ce noyau peut également être circulaire ou avoir un profil quelconque. En outre, il est également envisageable d'utiliser ce type de coffrage dans une cage d'escalier ouverte. Dans ce cas, les éléments doivent être fixés à des supports reconstituant une cage d'escalier fictive ou être montés sur des étais .These lower and upper elements are mounted in the stairwell 11, between its side walls 12, 13 and a central core 1. In the example shown, the central core \ is a substantially flat wall ending in a rounded flank 15, but this core can also be circular or have any profile. In addition, it is also possible to use this type of formwork in an open stairwell. In this case, the elements must be fixed to supports reconstituting a fictitious stairwell or be mounted on props.
Dans le cas de la figure 1, l'élément inférieur est fixé aux parois latérales de la cage de l'escalier et à un noyau central.In the case of Figure 1, the lower element is fixed to the side walls of the stairwell and to a central core.
Les organes de support 16 de la paillasse 10 se composent de traverses tubulaires télescopiques longitudinales 18, sensiblement horizontales et plus ou moins espacées selon la dimension de l'escalier à réaliser, associées à chacune de leurs extrémités à des éléments de fixation 19- Afin d'obtenir le profil de paillasse voulu, ces traverses comportent à chacune de leurs extrémités une tête à rotule 20 et sont, par endroits , en appui sur des étais verticaux réglables 17-The support members 16 of the bench 10 consist of longitudinal telescopic tubular sleepers 18, substantially horizontal and more or less spaced depending on the size of the staircase to be made, associated at each of their ends with fastening elements 19- In order to obtain the desired bench-top profile, these crosspieces comprise at each of their ends a ball head 20 and are, in places, supported on props adjustable verticals 17-
La tête à rotule 20 d'une extrémité des traverses 18 est engagée dans une douille 22 des moyens de fixation 19 desdites traverses à la paroi murale. Cette douille 22 est associée à une plaque 23 disposée en dessous du coffrage de la paillasse. Cette plaque est fixée à la paroi par deux vis 24. Après le décoffrage, il conviendra de boucher les trous des vis 24.The ball head 20 of one end of the crosspieces 18 is engaged in a socket 22 of the fastening means 19 of said crosspieces to the wall. This socket 22 is associated with a plate 23 disposed below the formwork of the bench. This plate is fixed to the wall by two screws 24. After formwork removal, the screw holes 24 should be plugged.
Lorsque l'escalier ne comporte pas de noyau central (figure 2) les traverses 18 comportent à une de leurs extrémités un tête à rotule 20 destinée à coopérer avec les moyens de fixation 19 à la paroi de la cage d'escalier et à leur autre extrémité une tête perforée 21. Cette tête perforée est agencée pour s'engager dans une goupille portée par un bras 80 qui constitue une guide pour une limonière 81 servant à mettre ensuite en place les panneaux de coffrage des contre- marches .When the staircase does not have a central core (Figure 2) the crosspieces 18 comprise at one of their ends a ball head 20 intended to cooperate with the means of attachment 19 to the wall of the stairwell and to their other end of a perforated head 21. This perforated head is arranged to engage in a pin carried by an arm 80 which constitutes a guide for a stringer 81 serving to then put in place the shuttering formwork panels.
Les étais 17, qui portent l'ensemble du coffrage, sont réglables en hauteur et pourvus d'une tête à rotule 25, engagée dans une cavité d'une douille 26 solidaire de chaque traverse 18 afin que la surface définie par les organes de support épouse parfaitement la forme de la paillasse.The stays 17, which carry the entire formwork, are adjustable in height and provided with a ball head 25, engaged in a cavity of a socket 26 integral with each cross member 18 so that the surface defined by the support members perfectly matches the shape of the bench.
La paillasse 10, qui constitue l'élément de finition et sur laquelle sera finalement coulé le béton, est posée sur les organes de support 16 après leur mise en place.The bench 10, which constitutes the finishing element and on which the concrete will ultimately be poured, is placed on the support members 16 after their installation.
Cette paillasse, représentée en coupe à la figure 3, est constituée par exemple d'une plaque centrale 30 d'une matière synthétique alvéolaire revêtue de deux couches 31 et 32 d'une substance polymérisée telle que de la résine polyester armée de fibres de verre ou de fibres de carbone appliquée de part et d'autre de cette plaque 30. Pour garantir une qualité de finition impeccable de la surface inférieure de l'escalier moulé, on peut appliquer, sur la couche supérieure 31 , un film d'imprégnation 33 destiné à faciliter le décoffrage.This bench, shown in section in Figure 3, consists for example of a central plate 30 of a cellular synthetic material coated with two layers 31 and 32 of a polymerized substance such as polyester resin reinforced with glass fibers or carbon fiber applied on both sides of this plate 30. To guarantee an impeccable quality finish on the surface lower of the molded staircase, one can apply, on the upper layer 31, an impregnation film 33 intended to facilitate the formwork.
Cette paillasse ainsi obtenue est rigide. Elle est préalablement réalisée en atelier par un procédé de moulage connu en soi sur un moule conçu à cet effet et découpée en plusieurs tronçons afin de faciliter son transport et sa mise en place. Après le découpage, et en vue de leur assemblage, chaque tronçon est pourvu sur sa face inférieure d' un profilé de section carrée ou coudée, comme le montre la figure 4. Les deux profilés coudés 41 et 42, respectivement solidaires des tronçons 10a, 10b de la paillasse, sont serrés l'un contre l'autre au moyen de vis de serrage 43. Un joint souple 44 est interposé au montage entre les deux tronçons pour en assurer l'étanchéité. D'autre part chaque tronçon est également équipé sur sa face inférieure d'une coulisse 27 (figure 2) dans laquelle on enfile une traverse 18 lors du montage, cette coulisse étant pourvue de la douille 26 agencée pour recevoir la tête à rotule 25 des étais 17-This benchtop thus obtained is rigid. It is previously carried out in the workshop by a molding process known per se on a mold designed for this purpose and cut into several sections in order to facilitate its transport and its installation. After cutting, and with a view to their assembly, each section is provided on its underside with a section of square or bent section, as shown in FIG. 4. The two bent sections 41 and 42, respectively integral with the sections 10a, 10b of the bench, are tightened against each other by means of clamping screws 43. A flexible seal 44 is interposed for mounting between the two sections to ensure sealing. On the other hand, each section is also equipped on its lower face with a slide 27 (FIG. 2) in which a cross member 18 is threaded during assembly, this slide being provided with the bush 26 arranged to receive the ball head 25 of the was 17-
Ce mode de réalisation se prête à une construction unitaire ainsi qu'à une réalisation de série aussi bien sur le chantier qu'en atelier. Dans ce dernier cas, l'escalier doit être moulé en position verticale pour éviter une déformation due aux pressions exercées par la masse de béton. Dans tous les cas, la qualité de la finition est impeccable, le gain de temps et l'amélioration de la qualité sont évidents .This embodiment lends itself to unitary construction as well as serial production both on site and in the workshop. In the latter case, the staircase must be molded in a vertical position to avoid deformation due to the pressures exerted by the mass of concrete. In all cases, the quality of the finish is impeccable, saving time and improving quality are evident.
Une autre forme de réalisation du coffrage selon l'invention est illustrée par la figure 5. Ce type de coffrage permet de construire rapidement un escalier de forme unique et variée avec une excellente qualité de finition. Dans cette forme de réalisation la paillasse ne peut pas être réutilisée.Another embodiment of the formwork according to the invention is illustrated in FIG. 5. This type of formwork makes it possible to quickly build a staircase of unique and varied shape with an excellent quality of finish. In this embodiment, the bench cannot be reused.
Les organes de supports 116 sont réalisés sous la forme d' un maillage de support de la paillasse 110, qui présente toutes les caractéristiques de résistance requises et qui permet une adaptation à toutes les formes de cages d'escaliers et d'escaliers. A cet effet, comme illustré par la figure 6, ces organes se composent de traverses longitudinales 118 et transversales 118' . Ces traverses illustrées plus en détail par la figure 7, comportent une tige centrale 170 composée de deux tubes 171 et 172 montés télescopiquement et qui portent à une de leurs extrémités chacun une tête 158 en forme de rotule. Les traverses 118' sont agencées pour relier entre elles de façon mobile les traverses longitudinales 118. Pour ce faire, lesdites traverses 118 sont équipés d'éléments d'accouplement 190 tels que représentés par la figure 8. Chacun de ces éléments est conçu pour recevoir les têtes à rotules 158' de deux traverses transversales 118' . A cet effet, ces éléments d'accouplement 190 comportent deux douilles latérales 200 réceptrices des têtes à rotule et une bride 201 qui se place sur la tige centrale de la traverse.The support members 116 are produced in the form of a support mesh for the benchtop 110, which has all the required resistance characteristics and which allows adaptation to all forms of stairwells and staircases. For this purpose, as illustrated in Figure 6, these bodies consist of crosspieces longitudinal 118 and transverse 118 '. These cross members illustrated in more detail in FIG. 7, comprise a central rod 170 composed of two tubes 171 and 172 mounted telescopically and which carry at one of their ends each a head 158 in the form of a ball joint. The crosspieces 118 ′ are arranged to connect the longitudinal crosspieces 118 in a mobile manner. To do this, the said crosspieces 118 are fitted with coupling elements 190 as shown in FIG. 8. Each of these elements is designed to receive the ball heads 158 'of two transverse crosspieces 118'. To this end, these coupling elements 190 comprise two lateral sockets 200 receiving the ball heads and a flange 201 which is placed on the central rod of the crosspiece.
La paillasse 110 réalisée sur ces organes de support 116 se compose d'un treillis 120 déformable afin d'obtenir la forme requise de la paillasse et d'une feuille 121 d'un matériau synthétique souple thermoformable .The bench 110 made on these support members 116 consists of a deformable lattice 120 in order to obtain the required shape of the bench and a sheet 121 of a flexible thermoformable synthetic material.
Le treillis 120 est avantageusement constitué par une grille articulée qui se prête au gauchissement. Il est maintenu en place sur les organes de support 116 par des brides de serrage (non représentées) ou tout autre moyen de fixation similaire. Il peut aussi être constitué de plusieurs grilles . En l'absence de treillis grilles , un simple treillis de coffrage du type treillis mécano-soudé convient parfaitement.The trellis 120 is advantageously constituted by an articulated grid which is suitable for warping. It is held in place on the support members 116 by clamps (not shown) or any other similar fixing means. It can also consist of several grids. In the absence of grids, a simple formwork lattice of the mechanically welded type is perfectly suitable.
La feuille 121 de matériau synthétique appliquée sur le treillis 120 est prédécoupée à l'aide d'un gabarit dans une plaque plane de mousse cellulaire thermoformable ou tout autre matériau synthétique souple thermoformable similaire. Elle est ensuite appliquée sur le treillis 120 et mise en forme par un courant d'air chaud.The sheet 121 of synthetic material applied to the trellis 120 is precut using a template in a flat plate of thermoformable cellular foam or any other similar flexible thermoformable synthetic material. It is then applied to the mesh 120 and shaped by a current of hot air.
La figure 9 représente une vue partielle en coupe qui illustre le mode de mise en place préféré des organes de support horizontaux 116 de la paillasse 110. Les traverses utilisées se prêtent au montage d'un coffrage pour une cage d'escalier constituée de parois latérales et d'une colonne ou mur central sur lesquelles on peut fixer les moyens de fixation murale 119- Ces moyens de fixation 119 se composent avantageusement d' une plaque de fixation 150, fixée au mur au moyen d' une cheville encastrée 151 et d'une vis 152, et qui porte un écrou fixe 153 destiné à recevoir un boulon 154 assurant la liaison avec une traverse 118. Ce boulon 154 est logé dans une douille tubulaire 155 solidaire d'une plaque 156 portant une douille fixe 157 pourvue d'une cavité ouverte destinée à loger la tête d'extrémité 158 en forme de rotule de la traverse 118. En outre, l' écrou 153 est pourvu d'un logement supérieur 60 agencé pour recevoir les barres transversalesFIG. 9 represents a partial sectional view which illustrates the preferred method of positioning the horizontal support members 116 of the bench 110. The crosspieces used lend themselves to the mounting of a formwork for a stairwell made up of side walls and a central column or wall on which one can fix the wall fixing means 119- These fixing means 119 advantageously consist of a fixing plate 150, fixed to the wall by means of a recessed plug 151 and a screw 152, and which carries a fixed nut 153 intended to receive a bolt 154 ensuring the connection with a cross member 118. This bolt 154 is housed in a tubular bush 155 secured to a plate 156 carrying a fixed bush 157 provided with an open cavity intended to accommodate the end head 158 in the form of a ball joint of the cross member 118. In addition, the nut 153 is provided with an upper housing 60 arranged to receive the transverse bars.
161 de l'armature métallique (non représentée) .161 of the metal frame (not shown).
Dans cette forme de réalisation les éléments de fixation murale 119 seront noyés dans le béton et seules des ouvertures pour le passage des douilles tubulaires 155 et des boulons 154 resteront apparentes quand l'escalier sera décoffré. On peut toutefois prévoir d'autres moyens de fixation murale qui peuvent être récupérés lors du décoffrage.In this embodiment, the wall fixing elements 119 will be embedded in the concrete and only openings for the passage of the tubular sockets 155 and the bolts 154 will remain visible when the staircase is exposed. However, other wall fixing means can be provided which can be recovered during formwork removal.
Dans d'autres réalisations , la forme des composants peut être quelque peu modifiée en fonction des besoins . En particulier, on peut envisager l' utilisation de l'élément inférieur porteur comme un coffrage perdu. Dans ce cas, des éléments de liaison entre ce coffrage et le béton coulé sont à prévoir. En outre, la surface inférieure de l'élément porteur peut être teintée ou structurée puisqu'elle restera définitivement comme élément décoratif sous l'escalier fini. On peut également utiliser ce procédé de coffrage pour un escalier "libre", c'est-à-dire pas situé dans une cage d'escalier, en utilisant deux limonières pour le guidage du coffrage et en équipant les organes de support de deux étais verticaux par traverse. In other embodiments, the shape of the components can be changed somewhat as required. In particular, one can consider the use of the lower load-bearing element as a lost formwork. In this case, connecting elements between this formwork and the poured concrete are to be expected. In addition, the lower surface of the supporting element can be tinted or structured since it will remain permanently as a decorative element under the finished staircase. This formwork process can also be used for a "free" staircase, that is to say not located in a stairwell, by using two stringer bars for guiding the formwork and by equipping the support members with two props vertical by cross.

Claims

REVENDICATIONS
1. Procédé de réalisation d'un coffrage d'escalier, notamment d'un escalier tournant, ce coffrage comprenant un élément inférieur appelé paillasse et des éléments supérieurs appelés coffrages des contre¬ marches, caractérisé en ce que l'on monte sur les parois de la cage de l'escalier des organes de support horizontaux agencés pour soutenir ladite paillasse, ces organes de support étant constitués de traverses tubulaires télescopiques longitudinales, en ce que l'on pose la paillasse constituée d'au moins une plaque d'un matériau synthétique sur les supports horizontaux, en ce que l'on fixe des panneaux pour former les coffrages des contre-marches , et en ce que l'on met en place une armature métallique comportant au moins des barreaux d'armature longitudinaux disposés sensiblement parallèlement à la surface de ladite paillasse.1. Method for producing a stair formwork, in particular a spiral staircase, this formwork comprising a lower element called a bench top and upper elements called formwork against the steps, characterized in that it is mounted on the walls of the stairwell of the horizontal support members arranged to support said bench, these support members being made up of longitudinal telescopic tubular crosspieces, in that the bench is made up of at least one plate of material synthetic on the horizontal supports, in that the panels are fixed to form the formwork of the steps, and in that a metal reinforcement is put in place comprising at least longitudinal reinforcement bars arranged substantially parallel to the surface of said bench.
2. Procédé selon la revendication 1 , caractérisé en ce que ledit matériau synthétique constituant la paillasse contient une résine polyester armée de fibres.2. Method according to claim 1, characterized in that said synthetic material constituting the benchtop contains a polyester resin reinforced with fibers.
3. Procédé selon la revendication 2, caractérisé en ce que la paillasse obtenue est rigide et préalablement réalisée et divisée en plusieurs tronçons pouvant être assemblés.3. Method according to claim 2, characterized in that the benchtop obtained is rigid and previously produced and divided into several sections which can be assembled.
4« Procédé selon la revendication 1 , caractérisé en ce que ledit matériau synthétique est un matériau multicouche.4 "Method according to claim 1, characterized in that said synthetic material is a multilayer material.
5- Procédé selon la revendication 4, caractérisé en ce que l'on applique sur au moins une face dudit matériau synthétique au moins une couche d'une substance polymérisable et/ou un film d'une matière synthétique lisse.5- Method according to claim 4, characterized in that one applies to at least one face of said synthetic material at least one layer of a polymerizable substance and / or a film of a smooth synthetic material.
6. Procédé de réalisation d' un coffrage d'escalier, selon la revendication 1 , caractérisé en ce que les organes de support horizontaux agencés pour soutenir ladite paillasse sont constitués de traverses tubulaires télescopiques longitudinales et transversales , en ce que l'on forme ladite paillasse en posant au moins un treillis déformable sur lesdites traverses , en mettant en place sur ledit treillis une feuille prédécoupée d'un matériau synthétique thermoformable et en appliquant ladite feuille de matériau synthétique sur le treillis par chauffage, en ce que l'on fixe des panneaux pour former les coffrages des contre-marches, et en ce que l'on met en place une armature métallique comportant au moins des barreaux d'armature longitudinaux disposés sensiblement parallèlement à la surface de ladite paillasse.6. A method of producing a stair formwork, according to claim 1, characterized in that the horizontal support members arranged to support said bench are made of telescopic longitudinal and transverse tubular crosspieces, in that said form bench top by laying at least one trellis deformable on said crosspieces, by placing on said lattice a precut sheet of thermoformable synthetic material and applying said sheet of synthetic material on the lattice by heating, in that panels are fixed to form the formwork of the counter -marches, and in that one sets up a metal frame comprising at least longitudinal reinforcing bars arranged substantially parallel to the surface of said bench.
7. Procédé selon la revendication 6, caractérisé en ce que ledit matériau thermoformable est une mousse cellulaire.7. Method according to claim 6, characterized in that said thermoformable material is a cellular foam.
8. Procédé selon les revendications 1 et 6, caractérisé en ce que l'on monte lesdits organes de support horizontaux en fixant sur au moins un mur de la cage de l'escalier des éléments de fixation murale agencés pour recevoir chacun une extrémité desdites traverses tubulaires télescopiques longitudinales desdits organes de support.8. Method according to claims 1 and 6, characterized in that said horizontal support members are mounted by fixing on at least one wall of the stairwell wall fixing elements arranged to each receive one end of said sleepers longitudinal telescopic tubulars of said support members.
9. Procédé selon la revendication 6, caractérisé en ce que l'on équipe chaque traverse tubulaire télescopique d'au moins un élément d'accouplement agencé pour la relier de façon mobile à une autre traverse.9. Method according to claim 6, characterized in that each telescopic tubular cross member is fitted with at least one coupling element arranged to connect it in a mobile manner to another cross member.
10. Procédé selon la revendication 6, caractérisé en ce que l'on utilise des éléments de treillis articulés pour constituer ledit treillis déformable.10. Method according to claim 6, characterized in that hinged trellis elements are used to form said deformable trellis.
11. Coffrage d'escalier, notamment d'un escalier tournant, ce coffrage comprenant un élément inférieur appelé paillasse et des éléments supérieurs appelés coffrages des contre-marches , caractérisé en ce qu'il comporte des organes de support horizontaux (16; 116) agencés pour soutenir ladite paillasse (10, 110) constituée d'au moins une plaque d'un matériau synthétique, ces organes de support comportant des traverses tubulaires télescopiques longitudinales (18; 118) , des moyens de fixation (19; 119) desdits organes de support aux parois11. Stair formwork, in particular a spiral staircase, this formwork comprising a lower element called a bench top and upper elements called formwork against steps, characterized in that it comprises horizontal support members (16; 116) arranged to support said bench (10, 110) consisting of at least one plate of synthetic material, these support members comprising longitudinal telescopic tubular crosspieces (18; 118), fixing means (19; 119) of said members wall support
(12, 13) de la cage de l'escalier, des panneaux pour former les coffrages des contre-marches ainsi que des moyens de fixation de ces panneaux.(12, 13) of the stairwell, panels to form the formwork of the steps as well as means for fixing these panels.
12. Coffrage selon la revendication 11 , caractérisé en ce que chaque traverse (118) comporte une tige télescopique centrale ( 170) et au moins une tête (158) en forme de rotule fixée à au moins une extrémité de ladite tige centrale.12. Formwork according to claim 11, characterized in that each crosspiece (118) comprises a central telescopic rod (170) and at least one head (158) in the form of a ball joint fixed to at least one end of said central rod.
13. Coffrage selon la revendication 11 , caractérisé en ce que la paillasse (10) comporte plusieurs tronçons (10a, 10b, . . ) juxtaposés et assemblés , réalisés en un matériau synthétique rigide13. Formwork according to claim 11, characterized in that the bench (10) comprises several sections (10a, 10b,..) Juxtaposed and assembled, made of a rigid synthetic material
14. Coffrage selon la revendication 11, caractérisé en ce que la paillasse (110) comporte un treillis déformable (120) et une feuille de matériau synthétique thermoformable (121 ) .14. Formwork according to claim 11, characterized in that the bench (110) comprises a deformable mesh (120) and a sheet of thermoformable synthetic material (121).
15- Coffrage selon la revendication 11 , caractérisé en ce les organes de support (116) de la paillasse (110) comportent en outre des traverses tubulaires télescopiques transversales (118' ) agencées pour assurer l'accouplement transversal mobile d'au moins deux traverses longitudinales (118) .15- Formwork according to claim 11, characterized in that the support members (116) of the bench (110) further comprise transverse telescopic tubular sleepers (118 ') arranged to ensure the mobile transverse coupling of at least two sleepers longitudinal (118).
16. Coffrage selon la revendication 15, caractérisé en ce que chaque traverse (118) est pourvu d'au moins un élément d'accouplement (190) agencés pour recevoir au moins une tête (158' ) d'au moins une autre traverse (118* ) .16. Formwork according to claim 15, characterized in that each cross member (118) is provided with at least one coupling element (190) arranged to receive at least one head (158 ') of at least one other cross member ( 118 *).
17. Coffrage selon la revendication 11 , caractérisé en ce que lesdits organes de support (116) comportent des éléments de fixation murale (119) constitués d'une plaque de fixation (150) et d'une douille réceptrice (159) d'une tête (158) d'une desdites traverses longitudinales (118) . 17. Formwork according to claim 11, characterized in that said support members (116) comprise wall fixing elements (119) consisting of a fixing plate (150) and a receiving socket (159) of a head (158) of one of said longitudinal crosspieces (118).
PCT/CH1994/000158 1993-08-02 1994-08-02 Method for placing forms for a staircase, particularly a curved staircase, and resulting formwork WO1995004202A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE69401910T DE69401910T2 (en) 1993-08-02 1994-08-02 STAIRWAY PROCESSING METHOD, ESPECIALLY FOR TURNING STAIRS, AND FORMWORK PRODUCED BY THIS PROCESS
EP94921565A EP0663038B1 (en) 1993-08-02 1994-08-02 Method for placing forms for a staircase, particularly a curved staircase, and resulting formwork

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR93/09647 1993-08-02
FR9309647A FR2708651B1 (en) 1993-08-02 1993-08-02 Formwork process for a spiral staircase and formwork made using this process.

Publications (1)

Publication Number Publication Date
WO1995004202A1 true WO1995004202A1 (en) 1995-02-09

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PCT/CH1994/000158 WO1995004202A1 (en) 1993-08-02 1994-08-02 Method for placing forms for a staircase, particularly a curved staircase, and resulting formwork

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EP (1) EP0663038B1 (en)
AT (1) ATE149613T1 (en)
DE (1) DE69401910T2 (en)
FR (1) FR2708651B1 (en)
WO (1) WO1995004202A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4420849A1 (en) * 1994-06-15 1995-12-21 Clemens Evers Method of manufacturing concrete stair underside shuttering
EP0696668A1 (en) * 1994-08-12 1996-02-14 Baumann Verwertungsgesellschaft GmbH Device for the erection of a falsework for the underside of a building stair flight
WO1998049415A1 (en) * 1997-04-28 1998-11-05 A.R. Tiltform Pty Ltd Method and arrangement for forming construction panels and structures
AU757329B2 (en) * 2001-03-02 2003-02-13 Top Stairs & Staff Pty Ltd An improved method of staircase manufacture and components therefor
AT501248A1 (en) * 2004-03-05 2006-07-15 Loibl Robert DEVICE FOR CREATING PARTICULARLY QUARTERLY, HALF OR FULLY-ENVELOPED LOCAL TREPPES
US7153261B2 (en) 2003-04-25 2006-12-26 Tyco Healthcare Group Lp Surgical hand access apparatus
US7393322B2 (en) 2004-04-05 2008-07-01 Tyco Healthcare Group Lp Surgical hand access apparatus
US7717847B2 (en) 2004-04-05 2010-05-18 Tyco Healthcare Group Lp Surgical hand access apparatus
US7766824B2 (en) 2005-03-31 2010-08-03 Tyco Healthcare Group Lp Surgical hand access apparatus
CN112459475A (en) * 2020-11-30 2021-03-09 四川仟坤建设集团有限责任公司 Stair formwork supporting structure and mounting method thereof
CN114986434A (en) * 2022-07-06 2022-09-02 江西恒禹设备安装有限公司 Installation auxiliary fixtures are erect to large-scale metal storage tank outside dish ladder

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2798153B1 (en) * 1999-09-03 2001-11-23 Bernard Choquet ADJUSTABLE SHOWER SKIN FOR TURNING OR HELICOIDAL STAIRS
WO2018049481A1 (en) * 2016-09-15 2018-03-22 Riserform Pty Ltd Apparatus for use in falsework and formwork for forming steps and stairs
DE102019117850A1 (en) * 2019-07-02 2021-01-07 LOIROTEC GmbH Process for the production of staircase formwork, computer program and machine-readable storage medium as well as staircase formwork components and staircase formwork
DE102021101679A1 (en) * 2021-01-26 2022-07-28 Peri Se Device for attaching a ceiling formwork panel, ceiling formwork, ceiling panel for a ceiling formwork, carrier strip, carrier unit, carrier connection and carrier holder

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FR561371A (en) * 1923-01-24 1923-10-20 Quick and economical assembly system for reinforced concrete stairs
US3277219A (en) * 1961-03-27 1966-10-04 Lloyd S Turner Method of molding a building structure by spraying a foamed plastic on the inside of an inflatable form
DE1684533A1 (en) * 1967-12-19 1970-04-30 Johann Welter Metal cladding for stone stair construction
DE1684476A1 (en) * 1966-01-31 1970-12-17 Wilhelm Stimpfle Device for the production of fixed concrete stairs
DE2306569A1 (en) * 1973-02-10 1974-08-15 Anton Prim FORMWORK FOR POURING A SPIRAL STAIR
DE3430539A1 (en) * 1984-08-18 1986-02-27 Roger 7851 Binzen Basler Shuttering element for end faces of concrete steps
DE8604559U1 (en) * 1986-02-20 1986-04-30 Austermann, Reinhard, 4830 Gütersloh Construction kit for a staircase formwork
DE9200496U1 (en) * 1991-05-15 1992-03-26 Kb-Produkter I Nybro Ab, Nybro, Se
EP0487952A1 (en) * 1990-11-14 1992-06-03 Gerhard Dingler Building element
EP0499420A1 (en) * 1991-02-12 1992-08-19 British Ceramic Research Limited Mould forming
FR2683574A1 (en) * 1991-11-07 1993-05-14 Soframat Shuttering panel made of a laminated material

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR561371A (en) * 1923-01-24 1923-10-20 Quick and economical assembly system for reinforced concrete stairs
US3277219A (en) * 1961-03-27 1966-10-04 Lloyd S Turner Method of molding a building structure by spraying a foamed plastic on the inside of an inflatable form
DE1684476A1 (en) * 1966-01-31 1970-12-17 Wilhelm Stimpfle Device for the production of fixed concrete stairs
DE1684533A1 (en) * 1967-12-19 1970-04-30 Johann Welter Metal cladding for stone stair construction
DE2306569A1 (en) * 1973-02-10 1974-08-15 Anton Prim FORMWORK FOR POURING A SPIRAL STAIR
DE3430539A1 (en) * 1984-08-18 1986-02-27 Roger 7851 Binzen Basler Shuttering element for end faces of concrete steps
DE8604559U1 (en) * 1986-02-20 1986-04-30 Austermann, Reinhard, 4830 Gütersloh Construction kit for a staircase formwork
EP0487952A1 (en) * 1990-11-14 1992-06-03 Gerhard Dingler Building element
EP0499420A1 (en) * 1991-02-12 1992-08-19 British Ceramic Research Limited Mould forming
DE9200496U1 (en) * 1991-05-15 1992-03-26 Kb-Produkter I Nybro Ab, Nybro, Se
FR2683574A1 (en) * 1991-11-07 1993-05-14 Soframat Shuttering panel made of a laminated material

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4420849A1 (en) * 1994-06-15 1995-12-21 Clemens Evers Method of manufacturing concrete stair underside shuttering
EP0696668A1 (en) * 1994-08-12 1996-02-14 Baumann Verwertungsgesellschaft GmbH Device for the erection of a falsework for the underside of a building stair flight
DE4428577A1 (en) * 1994-08-12 1996-02-15 Baumann Verwertungs Gmbh Device for erecting formwork for the underside of the stair frame of a building staircase
WO1998049415A1 (en) * 1997-04-28 1998-11-05 A.R. Tiltform Pty Ltd Method and arrangement for forming construction panels and structures
AU757329B2 (en) * 2001-03-02 2003-02-13 Top Stairs & Staff Pty Ltd An improved method of staircase manufacture and components therefor
US7153261B2 (en) 2003-04-25 2006-12-26 Tyco Healthcare Group Lp Surgical hand access apparatus
AT501248A1 (en) * 2004-03-05 2006-07-15 Loibl Robert DEVICE FOR CREATING PARTICULARLY QUARTERLY, HALF OR FULLY-ENVELOPED LOCAL TREPPES
AT501248B1 (en) * 2004-03-05 2006-12-15 Loibl Robert DEVICE FOR CREATING PARTICULARLY QUARTERLY, HALF OR FULLY-ENVELOPED LOCAL TREPPES
US7393322B2 (en) 2004-04-05 2008-07-01 Tyco Healthcare Group Lp Surgical hand access apparatus
US7717847B2 (en) 2004-04-05 2010-05-18 Tyco Healthcare Group Lp Surgical hand access apparatus
US8123682B2 (en) 2004-04-05 2012-02-28 Tyco Healthcare Group Lp Surgical hand access apparatus
US8328844B2 (en) 2004-04-05 2012-12-11 Covidien Lp Surgical hand access apparatus
US8485971B2 (en) 2004-04-05 2013-07-16 Covidien Lp Surgical hand access apparatus
US9028402B2 (en) 2004-04-05 2015-05-12 Covidien Lp Surgical hand access apparatus
US7766824B2 (en) 2005-03-31 2010-08-03 Tyco Healthcare Group Lp Surgical hand access apparatus
US8282547B2 (en) 2005-03-31 2012-10-09 Tyco Healthcare Group Lp Surgical hand access apparatus
CN112459475A (en) * 2020-11-30 2021-03-09 四川仟坤建设集团有限责任公司 Stair formwork supporting structure and mounting method thereof
CN114986434A (en) * 2022-07-06 2022-09-02 江西恒禹设备安装有限公司 Installation auxiliary fixtures are erect to large-scale metal storage tank outside dish ladder

Also Published As

Publication number Publication date
DE69401910D1 (en) 1997-04-10
FR2708651A1 (en) 1995-02-10
DE69401910T2 (en) 1997-09-11
EP0663038B1 (en) 1997-03-05
EP0663038A1 (en) 1995-07-19
FR2708651B1 (en) 1995-10-13
ATE149613T1 (en) 1997-03-15

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