EP4060139A1 - Profile member for holding a canvas of a suspended ceiling and suspended ceiling comprising such a profile member - Google Patents

Abstract

Profile (1) for holding a canvas (7) for a false ceiling or false wall, the profile comprising a housing (3) intended to receive an edge of the canvas (7), the housing (3) being closed by a clamp comprising a fixed jaw (4) and a movable jaw (5) arranged to exert a holding force on the canvas edge (7) engaged in the housing (3), the fixed jaw (4) comprising a support surface for the jaw (5), the support surface being oriented towards the inside of the housing (3), characterized in that the movable jaw (5) is deformed and put under stress to bear against the support surface of the fixed jaw ( 4) and close the housing (3), before engagement of the canvas edge (7) in the housing (3).

Description

The invention relates to the technical field of stretched false ceilings and false walls.

False stretched ceilings and walls have been known for a long time. One can refer, for example, to the documents CA835014 (Barracudaverken, 1970 ), FR2078579 (Blick, 1971 ).

False stretched ceilings and false walls are formed by mounting at least one canvas on a frame.

The frame is formed by assembling sections, called smooth, made of polymeric material such as polyvinyl chloride, or of metal alloy, typically aluminum alloy, or of composite material, for example fiber-reinforced polymer material.

Depending on their constituent material, heddles are conventionally extruded or pultruded.

The frame can be fixed directly to the walls of a room, for example by screwing.

The canvas can then be of large surface area, and be formed by assembling strips.

False walls and false ceilings comprising slabs or boxes are also known, each slab comprising at least one canvas mounted on a frame of stringers.

When the false ceiling or the false wall is in the form of slabs, the frame can be contained or bagged in an envelope formed by the canvas. There are also slabs formed of two canvases attached to a frame, see for example FR1319171 (Isora, 1963 ), US3460299 (Wilson ).

False stretch ceilings are mounted, for the most part, with their stretched fabric horizontal in its entirety.

In some embodiments, the canvas being stretched over a horizontal frame of smooths fixed to the walls of a room, deformations of the stretched sheet are produced, as described in the documents FR1515260 (Saulnier, 1968 ) Where EP281468 (Scherrer, 1988 ).

The fabrics of false ceilings or false stretched walls are most often made of flexible polymer, in particular polyvinyl chloride. By deformable, we designate here the possibility of stretching these fabrics, by a manual effort.

There are also known stretched false ceilings and stretched false walls comprising a canvas that is not very deformable, in particular in fabric, or in coated fabric, for example by calendering.

The means of mounting the edges of canvases on a frame of stringers are very varied.

In a first family of means for mounting the canvas edges on the heald frame, the periphery of the canvas comprises an added strip of material, having a hook-shaped section.

In this first family and according to a first type of embodiment, the heald has a U-shaped groove and one of the two walls of the U-shaped groove of the heald has a lip turned towards the bottom of the groove, the canvas edge in form of hook coming to be anchored positively on this lip. One can refer, for example, to the document FR1303930 (Barracudaverken, 1962 ).

In this first family and according to a second type of embodiment, the heald comprises a U-shaped groove and one of the two walls of the groove of the heald comprises a shoulder, the part of which located towards the bottom of the groove forms a support for the edge canvas in the form of a hook. One can refer, for example, to the documents FR1475446 (Licentia, 1967 ), FR2002261 (Barracudaverken, 1969 ), EP338925 (Scherrer, 1989 ), FR2843141 (Mphi, 2004 ).

In this first family and according to a third type of embodiment, the heald has a U-shaped groove and each of the two walls of the groove of the heald has a shoulder and the edge of the canvas is in the form of a double hook. One can refer for example to the document FR2486127 (Allemann, 1982 ), FR2627207 (Bidini, 1989 ). In this first family and according to a fourth type of embodiment, the rail has a rigid lip on which the edge of the fabric is hooked. One can refer for example to the document FR2786515 (Newmat, 2000 ).

This first family of mounting means is very widely used, but has some drawbacks.

In particular, it is necessary to fix a strip of material having a hook-shaped section on the periphery of the fabric. This operation is long and meticulous.

Furthermore, when the canvas is made of PVC, the laying is usually carried out hot, using a hot air generator, for example using propane or butane gas. After setting up the means for mounting the canvas on the rail, the production of hot air is stopped, and the canvas returns to ambient temperature, which causes it to be put under tension in the frame of the rail. For this tensioning to be correct, the canvas must be prefabricated in the factory with precise dimensions.

In a second family of means for mounting the edges of the fabric in the frame of the heddles, the edge of the fabric is provided with a rod, generally of round cross-section, which is lodged with friction in a groove of the heald. One can refer for example to the documents FR1588150 (Pecault, 1970 ), FR2199505 (Tombu, 1974 ), DE102018100572 (Streckfuss, 2019 ).

This second family of assembly means has drawbacks similar to those of the first family.

In a third family of means for mounting the edges of canvas or fabric on a heald frame, a tensioning cover is added or hinged to the heald profile. One can refer for example to the documents DE2217116 (Loeoef, 1972 ), FR2157090 (Archambault, 1973 ), EP198834 (Serac, 1986 ).

The use of a tensioner cover has the disadvantage of requiring the manufacture and cutting of an additional part. When the tensioner cover is hinged to the rail profile, the canvas edge is often fixed to the tensioner cover by gluing or stapling. The dismantling of the canvas cannot be ensured without degradation of the canvas.

In a fourth family of means for mounting the canvas edges on the heald frame, the canvas is pinched. These mounting means allow the laying of a canvas stretched in fabric, for example in polyester textile coated with polyurethane, the laying of the canvas being carried out at room temperature, without requiring a heat source.

In this fourth family and according to a first type of embodiment, the fabric is pinched by the smooth against a wall such as a wall. One can refer, for example, to the document FR2675180 (Isaia, 1992 ), FR2715682 (Hosteing, 1995 ), FR 2734296 (Ringaud, 1996 ).

The pinching of the fabric against a wall, for example a wall, has many drawbacks. First, the pinch proves to be insufficient to sustainably maintain the canvas under tension. Secondly, the dismantling of the canvas is difficult. Furthermore, the wall against which the fabric is clamped, for example a wall, may have irregularities, so that the fabric is not maintained in a constant manner over the entire length of the rail fixed to the wall.

In this fourth family and according to a second type of embodiment, the heddle is provided with means forming a laying and tensioning clamp.

The pinching can be obtained by a profile snapped onto another profile. The use of a snap-on profile has the disadvantage of requiring the manufacture and cutting of two parts to form the rail.

The pinching can be obtained by a smooth profile comprising an articulated wing, as illustrated for example in the documents DE2207954 (Filzfabrik, 1973 ), US 4676016 (Phlips, 1987 ), US4805330 (Bubernak, 1989 ), US4817699 (Fein, 1989 ).

The pinching can be obtained by a smooth profile comprising an elastic wing, as illustrated for example in the documents US4197686 (Baslow, 1980 ), FR2642779 (Mecanobloc, 1990 ), FR2649433 (Aviloff, 1991 ), FR2823779 (Internova, 2002 ), FR2829781 (Cantiello, 2003 ), EN 2900171 and FR 2900172 (Gagliardi, 2007 ), FR2952088 (Normalu, 2011 ), FR3032464 (Swal, 2016 ), FR3064015 (Clipso, 2018 ), DE 102017107780 (Streckfuss, 2018 ), FR3071524 (Normalu, 2019 ).

The rails provided with fabric pinching means, for false ceilings or stretched false walls, have numerous drawbacks.

In particular, they do not allow effective and lasting pinching of the fabric of the false ceiling or false wall, in particular when the fabric is thick.

In an attempt to overcome this drawback, it has been proposed to produce sections provided with teeth in the pinching zone of the stretched fabric. One can refer, for example, to the documents US4625490 (Baslow, 1986 ), US5214892 (Livingstone, 1993 ), FR2699209 , EN 2699210 , FR2699211 and FR2699212 (Swal, 1994 ), US5953873 (Novawall, 1999 ), US5970669 (Livingstone, 1999 ), US6499262 (Novak, 2002 ), US20040117957 (Kintzing, 2004 ), US2009028748 (Goddard, 2009 ), US2015361662 (Novawall, 2015 ).

The presence of these teeth can lead to deterioration of the canvas edge.

The invention aims to overcome the drawbacks which have just been presented.

For these purposes, there is proposed, according to a first aspect, a profile for holding a canvas for a false ceiling or false wall, the profile comprising a housing intended to receive an edge of the canvas, the housing being closed by a clip comprising a fixed jaw and a mobile jaw arranged to exert a holding force on the canvas edge engaged in the housing, the fixed jaw comprising a support surface for the mobile jaw, the support surface being oriented towards the inside of the housing, the mobile jaw being deformed and put under stress to come to bear on the support surface of the fixed jaw and close the housing, before engagement of the edge of the fabric in the housing.

In advantageous implementations, a force amplifier is placed in the housing, the force amplifier being put under stress when the housing is closed by deformation of the movable jaw.

The force amplifier is advantageously a strip of material coextruded with the profile.

The profile is advantageously made of polymer material, extruded or pultruded in a configuration in which the movable jaw is at a distance from the fixed jaw and the housing is open. For example, the profile is made of polyvinyl chloride or acrylonitrile butadiene styrene.

Advantageously, at least one of the two jaws is provided, on its surface intended to grip the edge of the canvas, with a surface state or a coating increasing the retention of the edge of the canvas. For example, at least one of the two jaws is provided with pads made of silicone or plasticized polyvinyl chloride. For example, at least one of the two jaws is provided with said pads, the other jaw being provided with grooves of shapes complementary to those of the pads. Advantageously, the profile comprises an anchoring wing for its attachment to a wall such as a wall or a ceiling, and the profile comprises at least one strip of material forming a damper on the external face of the anchoring wing. In some implementations, multiple strips of damper material are placed over the external face of the anchoring wing, the strips of material forming a damper having a trapezoidal cross-section. Advantageously, an adhesive is placed between the strips of material forming a damper. The strips of material forming a damper are for example made of elastomer. Advantageously, the strips of material forming a damper are coextruded with the strip of material forming the anchoring wing.

In some implementations, the section includes a caulking tongue, capable of masking from view the space existing between the anchoring wing and the fixing wall of the section.

In some implementations, the mobile jaw comprises a lug defining two support zones for the end of a tool, for the movement of the mobile jaw inside the housing. Advantageously, the profile comprises a guide drilling groove for a cutting tool, the groove being arranged on the fixed jaw, below the fabric pinching zone.

In certain embodiments, the profile comprises an anchoring wing for its attachment to a wall such as a wall or a ceiling and a reinforcing wing substantially parallel to the anchoring wing, a space internal to the profile being defined between the two wings and forming a stiffening box. Advantageously, the internal space is of trapezoidal section, the small base of the trapezium being formed by the reinforcing wing, the large base of the trapezium being formed by the anchoring wing, the housing being delimited by the reinforcing wing , the fixed jaw and the mobile jaw.

In certain embodiments, the profile comprises an anchoring wing for its attachment to a wall such as a wall or a ceiling, and an angled wing and a reinforcing wing substantially perpendicular to the anchoring aid. Advantageously, at least one internal space is arranged between the square flange and the reinforcing flange, this internal space forming a stiffening box, the housing being delimited by the reinforcing flange, the fixed jaw and the mobile jaw.

It is proposed, according to a second aspect, an assembly comprising a profile as presented above, and a false wall fabric, the fabric being a deformable fabric such as polyvinyl chloride fabric, or a substantially non-deformable fabric such as a polyester canvas coated with polyurethane.

It is proposed, according to a third aspect, a false wall comprising such an assembly, the profile forming a frame in which the fabric is held. In some implementations, the profile forms a false wall slab frame such as a false ceiling slab. In other implementations, the profile forms a frame fixed to a wall such as a wall or a ceiling.

• la figure 1 est une vue en coupe transversale d'une lisse, selon un premier mode de réalisation, la lisse étant en position fermée;
• la figure 2 est une vue en coupe transversale d'une lisse, selon un deuxième mode de réalisation, la lisse étant en position fermée;
• la figure 3 est une vue de détail en coupe transversale de la lisse de la figure 1, la lisse étant en position ouverte;
• la figure 4 est une vue en coupe transversale de la lisse de la figure 2, la lisse étant en position ouverte ;
• la figure 5 est une vue de détail de la lisse représentée en figure 4 ;
• la figure 6 est une vue montrant des états intermédiaires de la lisse de la figure 5, entre sa position ouverte et sa position fermée ;
• la figure 7 est une vue de détail de la zone de pincement de la toile, dans les lisses du type représenté en figure 1 ou 2, un outil d'arasement étant schématisé en figure 7;
• la figure 8 est une vue de détail analogue à la figure 7, les éléments de la lisse étant représentés en vue éclatée ;
• la figure 9 représente différentes utilisation d'un outil pour le montage et le démontage d'une toile dans une lisse du type représenté en figures 1 ou 2 ;
• la figure 10 est une vue de détail de la lisse représentée en figure 4, la lisse étant fixée sur une paroi telle qu'un mur, la lisse étant en position ouverte ;
• la figure 11 est une vue de la lisse représentée en figure 2, la lisse étant fixée sur une paroi telle qu'un mur, la lisse étant en position fermée ;
• la figure 12 est une vue analogue à la figure 10, la lisse étant fixée sur une paroi telle qu'un mur présentant des défauts de planéité, la lisse étant représentée en position ouverte.

Other objects and advantages of the invention will appear in the light of the description of an embodiment, given below with reference to the appended drawings in which:

• the figure 1 is a cross-sectional view of a heddle, according to a first embodiment, the heddle being in the closed position;
• the figure 2 is a cross-sectional view of a heddle, according to a second embodiment, the heddle being in the closed position;
• the picture 3 is a cross-sectional detail view of the stringer of the figure 1 , the arm being in the open position;
• the figure 4 is a cross-sectional view of the stringer of the figure 2 , the rail being in the open position;
• the figure 5 is a detail view of the rail shown in figure 4 ;
• the figure 6 is a view showing intermediate states of the rail of the figure 5 , between its open position and its closed position;
• the figure 7 is a detail view of the canvas pinch zone, in the heddles of the type shown in picture 1 or 2 , a leveling tool being schematized as figure 7 ;
• the figure 8 is a detail view similar to the figure 7 , the elements of the rail being shown in exploded view;
• the figure 9 represents different uses of a tool for mounting and dismounting a canvas in a rail of the type shown in figures 1 or 2 ;
• the figure 10 is a detail view of the rail shown in figure 4 , the smooth being fixed on a wall such as a wall, the smooth being in the open position;
• the figure 11 is a view of the rail shown in picture 2 , the smooth being fixed on a wall such as a wall, the smooth being in the closed position;
• the figure 12 is a view analogous to figure 10 , the smooth being fixed on a wall such as a wall having unevenness, the smooth being shown in the open position.

In the appended figures are shown profiles and mountings of fabrics on profiles, seen in section.

To facilitate reading, an orthogonal reference XYZ is defined in these figures comprising three perpendicular axes two by two, namely: an X axis, defining a horizontal direction, a Y axis, defining a vertical direction, which with the X axis defines a vertical XY plane, and a Z axis, perpendicular to the horizontal XY plane.

In the rest of this description, the terms "horizontal", "vertical", "top", "bottom" are used in reference to this XYZ reference, without this implying any limitation in the orientation that the profile can take when of its use.

Thus, for example, the profile can be used for the production of false ceilings, and carry a canvas extending substantially horizontally. The profile can be used for the production of false walls, and carry a canvas extending substantially vertically. The profile can also be used for the production of false walls, and carry a fabric extending along a plane forming any angle with the vertical.

In the rest of this description, only an edge portion of each fabric is shown mounted on a profile.

It is understood that the profile can be used for the production of a frame, this frame being fixed to a civil engineering structure (such as a wall, a ceiling, a partition). The frame can be formed by assembling a profile as shown in the figures.

It is understood that the profile can be used for the production of a slab or box frame, the slab or box being for example mounted suspended from a ceiling, or even fixed to a civil engineering wall (such as a wall, or a partition).

In the figures, the profile is shown in section.

It is understood that the profile can be made in the form of a slender rectilinear section extending in the direction Z perpendicular to the plane of the figures. The profile thus allows the production of square or polygonal slabs, or can be a smooth fixed on the walls of a room.

In other implementations, the profile is curved, allowing the production of contour slabs comprising at least one curved section, for example a circular or oval contour, these slabs being for example suspended.

The profile or profiled element 1 can be made of a polymer material, in particular of rigid polyvinyl chloride. By rigid, is meant here the fact that the profile cannot be stretched or plastically deformed by manual effort.

In other implementations, the profile 1 is made of composite material, in particular with a fiber-reinforced polymer matrix.

In a particular implementation, the profile 1 is made of polymer material reinforced with fiberglass or vegetable fiber such as flax fiber. This arrangement makes it possible to achieve high mechanical strength per linear meter of profile.

The profile 1 can be cut, by means known per se, to the desired length, and the profile sections can be assembled together, in particular by fishplates, brackets, in a manner known per se.

The profile 1 is advantageously derived from extrusion or pultrusion.

In the embodiments appearing in the figures, the profile 1 is in the form of a hollow body, the profile 1 comprising an internal space 2 for stiffening in the embodiment of the figure 1 , or two internal spaces 2 in the embodiment of the figure 2 .

These arrangements are advantageous in terms of mechanical strength per linear meter of profile. These provisions also allow the passage of wired elements, if necessary, for example for low current.

In other embodiments, not shown, the profile does not include an internal stiffening space, or includes a reinforcing insert housed in an internal space. These provisions can be advantageous when the material used for the manufacture of the profile has good properties in terms of carbon balance or life cycle analysis, but does not have good mechanical properties.

In the embodiments shown, the webs or fabrics are represented in the form of strips of low, substantially constant thickness.

It is understood that each fabric or layer can be solid or not, for example provided with perforations or microperforations. The microperforations can allow acoustic attenuation, as described in the document WO01/71116 (Newmat ). As a variant, the web or canvas can be provided with opening perforations visible to the naked eye.

In some implementations, the canvas is made of a deformable polymer, in particular polyvinyl chloride. By deformable, we designate here the possibility of stretching these fabrics, by a manual effort.

In other implementations, the canvas is not very deformable, in particular in fabric, or in coated fabric, for example by calendering. In certain particular implementations, the fabric is made of polyester fabric coated with polyurethane.

The profile 1 can be in two distinct states.

In a first state, represented in figures 3 to 5 , 10 and 12 , a housing 3 of the profile 1 is open. This first state of the profile 1 is that obtained during the manufacture of the profile, for example by extrusion or pultrusion.

In a second state, represented in figures 1, 2 and 11 , the housing 3 of the profile 1 is closed.

This second state is advantageously obtained by a step following the manufacture of the profile, for example by passing the profile resulting from extrusion or pultrusion through a train of profiling rollers. The profile is thus advantageously delivered closed, for its use on construction sites for the installation of false ceilings or false walls.

In other implementations, the profile is delivered open, and the closure of the profile is carried out on the installation site of false ceilings or false walls, or during a previous finishing operation.

The profile 1 comprises a fixed jaw 4 and a movable jaw 5. The term jaw is used here in reference to the jaws of a clamp or a vice.

The closing of the profile 1 leads to the approximation then to the support with constraint of the mobile jaw 5 against the fixed jaw 4. Several states intermediaries of the movable jaw 5, during this closing of the profile, are represented in figure 6 .

Closing the profile using a tool, such as for example a train of profiling rollers, advantageously makes it possible to obtain a high clamping force for the clamp formed by the movable jaw 5 and the fixed jaw 4.

This clamping force is all the higher when the movable jaw 5 does not comprise a weakened zone or an articulation zone, unlike the profiles of the state of the art comprising a wing provided with a thinned zone forming joint area.

The thickness of the movable jaw 5 is thus advantageously slightly decreasing, in a constant manner, between its base 5a and its end part 5b.

Advantageously, a force amplifier 6 is placed in the housing 3. This force amplifier 6 is placed under compressive stress when the housing is closed, by deformation of the movable jaw 5.

In some implementations, this force amplifier 6 is a strip of flexible material. The term flexible is used here in reference to the ability of a material to deform under the application of a compressive stress. Advantageously, the profile is bi-material, the strip of flexible material is coextruded with the semi-rigid material forming the profile.

In the implementations shown, the force amplifier 6 has a full circular cross-section. In other embodiments, not shown, the force amplifier 6 is of oval or polygonal section.

By way of indication, the force amplifier 6 is of circular section, with a diameter of between 4 and 6 mm.

The fabric 7 mounted in the profile 1 is clamped between the movable jaw 5 and the fixed jaw 4.

At least one of the two jaws 4, 5 is provided with means increasing the grip.

In the embodiments shown, the fixed jaw 4 is provided with pads 8 of soft material, the movable jaw 5 being provided with grooves 9 of shapes complementary to those of the pads 8 of the fixed jaw 4. In other embodiments, not represented, the fixed jaw is provided with grooves of shapes complementary to those of soft material pads placed on the movable jaw 5.

The flexible material forming the pads is for example a silicone or a plasticized PVC. Advantageously, the pads are co-extruded with the material forming the profile.

The material forming the pads advantageously has a stickiness or a high coefficient of friction.

In some implementations, the material forming the pads 8 has adhesive properties when it is brought to a temperature of the order of 30° C. to 45° C. approximately, the temperature range used when installing false ceilings in PVC.

By way of example, the bearings have a radius of curvature of the order of 0.25 mm.

These provisions promote good retention of the fabric 7, by clamping between the fixed jaw 4 and the movable jaw 5, without risk of damaging the fabric.

The profile 1 comprises an anchoring wing 10, for fixing it against a wall such as for example a wall or a ceiling.

In some implementations, the profile 1 is fixed using nails or staples, using a pneumatic gun. This technique is quick and clean, and is widely used, but has drawbacks.

In particular, the pressure exerted for fixing can lead to breaks or cracks in the profile, especially when the profile is made of PVC.

The section 1 comprises means making it possible to limit the risks of breakage or cracking during the use of pneumatic guns. The profile 1 comprises, on the outer face of the anchoring wing, at least one mass of mechanically absorbing material, hereafter called damper 11.

In the embodiment shown in figure 4 , the profile 1 comprises several dampers 11, substantially equidistant, of rectangular section.

The dampers advantageously have a cross-section in the shape of a trapezoid, as shown for example in figures 1 and 2 , the small base of the trapezoid being in contact with the anchoring wing 10, the large base of the trapezium being intended to come into contact and bear against a wall 12 such as a wall or a ceiling.

An adhesive 13 is advantageously placed between the dampers 11. In the embodiment shown in figure 11 , the spaces separating the dampers 11 are filled with adhesive 13, these spaces having a cross-section in the shape of a trapezium, the small base of the trapezium being in contact and resting on the wall 12, the large base of the trapezium being in contact with the anchor wing 10.

In other implementations, the dampers 11 are of trapezoidal section, the small base of the trapezium being in contact and resting on the wall 12, the space located between the dampers 11 containing the adhesive 13.

These provisions allow a synergy between the damping effect produced by the material of the shock absorbers 11, and the bonding effect produced by the adhesive 13. Optimal adhesion of the profile 1 to the wall 12 is thus obtained, with very low risk of degradation of the profile 1 during its fixing.

The shock absorbers 11 absorb part of the mechanical energy when the anchoring means (screw, staple, nail) passes through the anchoring wing 10. The shock absorbers 11 are put under stress and are compressed when the fixing of the profile causes a pressure of the anchoring wing 10 against the wall 12.

The dampers 11 are for example made of elastomer.

By way of example, the dampers are in the form of blocks of rectangular section, of dimensions 2 mm×0.5 mm.

In an advantageous implementation, the dampers 11 come from coextrusion with the semi-rigid material forming the anchoring wing 10. In order to increase the effectiveness of the bonding, the outer face 14 of the anchoring wing 10 is rough, and comprises for example parallel grooves.

The anchoring wing 10 advantageously comprises pins 15 for inserting the means for fixing the profile 1. In the embodiments shown, the anchoring wing 10 comprises three pins 15, equidistant, arranged opposite the spaces intended to house the adhesive 13.

The profile 1 includes a tab 16 caulking. This tongue 16 forms a flexible flap. By flexible, is meant here the fact that the tongue is hinged to the rest of the profile 1. Advantageously, the tongue 16 is derived from coextrusion.

When the wall 12 does not have any unevenness, as shown in figure 11 , the tongue 16 is placed between the anchoring wing 10 and the wall 12. The tongue 16 advantageously has a thickness substantially equal to that of the shock absorbers 11. The tongue 16 thus participates in the damping effect during the fastening of profile 1 to wall 12.

When the wall 12 has defects or when it is not possible to press the anchoring wing 10 against the wall 12, as shown in figure 12 , the tab closes and hides from view the space between the anchoring wing 10 and the wall.

The profile 1 comprises a lug 17, in the vicinity of the movable jaw 5.

This lug 17 performs several functions.

A first function of the lug 17 is to define two support zones 18, 19 for the end 21 of a tool 20, for dismantling the fabric 7. Manual effort on the tool 20 makes it possible to slightly lift the movable jaw 5 with respect to the fixed jaw 4, thus releasing the fabric 7, as shown in figure 9 .

A second function of the lug 17 is to separate the fabric 7 from the profile 1. The lug 17 is advantageously rounded in shape and has a smooth surface, so that the fabric 7 is not damaged by contact with the lug 17. The canvas thus only touches the mobile wing of section 1 on a very small surface of contact with the lug 17.

The profile 1 comprises a groove 22 forming a guide for a cutting tool 23, such as for example a cutter. The groove 22 is placed on the fixed jaw 4, below the space in which the canvas 7 is held tight. When the profile 1 is closed and the fabric 7 is clamped between the fixed jaw 4 and the movable jaw 5, the groove 22 is accessible for a cutting tool 23.

As it is represented in figure 7 , the groove 22 guides the cutting tool 23, allowing a leveling of the surplus 24 of canvas. This guide allows fast and practical cutting, with a perfect aesthetic result.

In the embodiment of the figure 1 , the profile 1 comprises a reinforcing wing 25 substantially parallel to the anchoring wing 10. The internal space 2 is arranged between the two wings 10, 25 and forms a box, providing rigidity to the profile. The internal space 2 is of trapezoidal section, the small base being formed by the wing 25, the large base being formed by the anchoring wing 10. The housing 3 is delimited by the reinforcing wing 25, the fixed jaw 4 and the movable jaw 5.

In the embodiment of figure 2 and 4 , the section 1 comprises an angled flange 26 and a reinforcing flange 27, two internal spaces 2 being arranged between the flanges 26, 27 and forming two boxes, providing rigidity to the profile. The housing 3 is delimited by the reinforcing wing 27, the fixed jaw 4 and the movable jaw 5. The anchoring wing 10 comprises an upper part, above the angled wing, and a lower part . The upper part of the anchoring wing 10 is slightly inclined with respect to the lower part of the anchoring wing 10. This slight inclination disappears after fixing the profile 1 on a wall 12, as shown in figure 11 .

The profile has many advantages.

The pinching of the fabric is very clearly increased, compared to the profiles known from the prior art. This increase in the holding force of the fabric in the profile is obtained by several means, which can be used alone or in combination.

The deformation of the mobile jaw is carried out in the mass of the material forming the mobile jaw. The movable jaw advantageously does not include a thinned zone which would form an articulation zone. The thickness of the movable jaw is advantageously slightly decreasing from its base to its end.

The deformation of the mobile jaw is advantageously carried out by a train of rollers, after extrusion or pultrusion of the profile. The profile is thus manufactured with the housing 3 open, the mobile jaw being substantially free of constraint, with the exception of those resulting from extrusion or pultrusion. The use of mechanical means such as a train of rollers allows application of a high mechanical force on the movable jaw, for closing the housing 3 and pressing the movable jaw against the fixed jaw. The profile is thus advantageously delivered with the housing closed, the clamp being under stress.

The pinching of the fabric is further advantageously increased by the arrangement of a stress amplifier 6, and by the arrangement of pads 8 and grooves 9 on the surfaces of the jaws.

The risks of degradation of the fabric are reduced, compared to the profiles of the state of the art. This reduction in the risk of Fabric degradation is achieved by several means, which may be used alone or in combination.

The fabric is advantageously pinched between two surfaces devoid of teeth or zig-zag shapes.

The presence of pads of soft material contributes to reducing the risk of marking the canvas when it is tightened by the pliers. The lug 17 creates a distance between the taut canvas and the movable jaw 5, the contact surface between the taut canvas and the movable jaw being limited to the smooth surface of the lug.

The disassembly of the fabric is facilitated, compared to the profiles known from the prior art.

The lug 17 forms two support zones for a dismantling tool, such as for example a spatula. A manual effort allows the mobile jaw to be moved slightly inside the housing, freeing the edge of the canvas.

The mounting of the fabric on the profile is facilitated, compared to the profiles of the state of the art. This ease of assembly is obtained by several means, which can be used alone or in combination.

The profile is advantageously one-piece, unlike many profiles of the state of the art, which include an attached tensioning cover. The elements of the profile are advantageously made in one piece, by coextrusion.

The leveling of the canvas is facilitated by the presence of a guide groove for a cutting tool such as a cutter.

A caulking tab in the form of a flexible flap making it possible to take into account flatness defects in the support wall of the profile, and to hide from view the space that could exist between the support wall and the profile.

Claims (24)

Profile (1) for holding a canvas (7) for a false ceiling or false wall, the profile comprising a housing (3) intended to receive an edge of the canvas (7), the housing (3) being closed by a clamp comprising a fixed jaw (4) and a movable jaw (5) arranged to exert a holding force on the canvas edge (7) engaged in the housing (3), the fixed jaw (4) comprising a support surface for the jaw (5), the support surface being oriented towards the inside of the housing (3), characterized in that the movable jaw (5) is deformed and put under stress to bear against the support surface of the fixed jaw ( 4) and close the housing (3), before engagement of the canvas edge (7) in the housing (3). Profile (1) according to Claim 1, characterized in that a force amplifier (6) is placed in the housing (3), the force amplifier (6) being put under stress when the housing (3) is closed. by deformation of the movable jaw (5). Profile (1) according to Claim 2, characterized in that the force amplifier (6) is a strip of material coextruded with the profile (1). Profile (1) according to any one of Claims 1 to 3, characterized in that the profile (1) is made of polymer material, extruded or pultruded in a configuration in which the movable jaw (5) is at a distance from the fixed jaw ( 4) and the housing (3) is open. Profile (1) according to any one of Claims 1 to 4, characterized in that the profile (1) is made of polyvinyl chloride or of acrylonitrile butadiene styrene. Profile (1) according to any one of Claims 1 to 5, characterized in that at least one of the two jaws (4, 5) is provided, on its surface intended to pinch the edge of the canvas (7), with 'a state of surface or coating increasing the maintenance of the edge of the fabric (7). Profile (1) according to Claim 6, characterized in that at least one of the two jaws is provided with pads (8) made of silicone or plasticized polyvinyl chloride. Section (1) according to Claim 7, characterized in that one of the two jaws is provided with the said bearings (8), the other jaw being provided with grooves (9) of shapes complementary to those of the pads (8). Profile (1) according to any one of Claims 1 to 8, characterized in that it comprises an anchoring wing (10) for its attachment to a wall such as a wall or a ceiling, the profile (1) comprising at least one strip of material forming a shock absorber (11) on the external face of the anchoring wing (10). Profile (1) according to Claim 9, characterized in that several strips of material forming a shock absorber (11) are placed on the external face of the anchoring wing (10), the strips of material forming a shock absorber (11) having a trapezoidal cross section. Profile (1) according to Claim 10, characterized in that an adhesive (13) is placed between the strips of material forming a damper (11). Profile (1) according to Claims 10 or 11, characterized in that the strips of material forming a damper (11) are made of elastomer. Profile (1) according to any one of Claims 10 to 12, characterized in that the strips of material forming the shock absorber (11) are coextruded with the strip of material forming the anchoring wing (10). Profile (1) according to any one of Claims 9 to 13, characterized in that it comprises a caulking tongue (16), capable of masking from view the space existing between the anchoring wing (10) and the fixing wall of the profile. Profile (1) according to any one of the preceding claims, characterized in that the movable jaw (5) comprises a lug (17) defining two support zones (18, 19) for the end (21) of a tool (20), for moving the mobile jaw (5) inside the housing (3). Profile (1) according to any one of the preceding claims, characterized in that it comprises a groove (22) drilling guide for a cutting tool (23), the groove (22) being arranged on the fixed jaw (4) , below the canvas pinch zone (7). Section (1) according to any one of the preceding claims, characterized in that it comprises an anchoring wing (10) for its attachment to a wall such as a wall or a ceiling and a wing reinforcement (25) substantially parallel to the anchoring wing (10), an internal space (2) to the section (1) being defined between the two wings (10, 25) and forming a stiffening box. Profile (1) according to Claim 17, characterized in that the internal space (2) has a trapezoidal section, the small base of the trapezium being formed by the reinforcing wing (25), the large base of the trapezium being formed by the anchoring wing (10), the housing (3) being delimited by the reinforcing wing (25), the fixed jaw (4) and the mobile jaw (5). Profile (1) according to any one of Claims 1 to 16, characterized in that the profile (1) comprises an anchoring wing (10) for its attachment to a wall such as a wall or a ceiling, and a square wing (26) and a reinforcing wing (27) substantially perpendicular to the anchoring aid (10). Profile (1) according to Claim 19, characterized in that at least one internal space (2) is arranged between the angled wing (26) and the reinforcing wing (27), this internal space (2) forming a stiffening box, the housing (3) being delimited by the reinforcing wing (27), the fixed jaw (4) and the movable jaw (5). Assembly comprising a profile (1) according to any one of Claims 1 to 20 and a fabric for the false wall, characterized in that the fabric is a deformable fabric such as polyvinyl chloride fabric, or a substantially non-deformable fabric such as a polyester canvas coated with polyurethane. False wall comprising an assembly according to claim 21, characterized in that the section forms a frame in which the fabric is held. False wall according to Claim 22, characterized in that the profile forms a false wall slab frame such as a false ceiling slab. False wall according to Claim 22, characterized in that the section forming a frame fixed to a wall such as a wall or ceiling.

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