WO2008142351A2

WO2008142351A2 - Trim strip for a fabric display panel and panel tensioning system

Info

Publication number: WO2008142351A2
Application number: PCT/FR2008/050853
Authority: WO
Inventors: Eric Bihr
Original assignee: Prismaflex International
Priority date: 2007-05-18
Filing date: 2008-05-16
Publication date: 2008-11-27
Also published as: WO2008142351A3; EP2146852A2; FR2916158A1; FR2916158B1

Abstract

The invention relates to a trim strip (4) intended to be disposed along the edge (5) of a fabric panel (3) in order to tension the panel (3) by inserting same into a continuous groove (12) provided along the periphery of a frame (1). The invention is characterised in that the trim strip includes: three ribs (27, 28, 29) each comprising a ridge (7, 8, 9) at the vertex thereof, which ridges extend in parallel so as to define a prism (40) with a triangular base, and a flat coupling area (41) for solidly connecting the edge (5) of the fabric panel (3) to the trim strip (4). The invention is also characterised in that at least one of the three ridges (7, 8, 9) can move towards another ridge. The invention also relates to a fabric panel provided with a trim strip (4) and to the system for maintaining same on a frame (1).

Description

JONC EQUIPPING A DISPLAY CANVAS. DISPLAY CANVAS AND SYSTEM FOR MAINTAINING A CANVAS TENSION

TECHNICAL AREA

The invention relates to the field of maintaining under tension a poster or a canvas on a rigid frame. Such canvases can be used in particular to decorate an interior wall in a particular home, but also to keep under tension a display screen on an outdoor advertising billboard.

PRIOR ART

As described in EP 0 294 301, it is known to equip the selvedge with a web with a ring that cooperates with a rigid frame. This ring is secured to the periphery of the fabric and allows both to maintain and power on the canvas on the frame. This type of ring has a cylindrical shape that penetrates into an open profile and cooperates with two tongues.

Thus, the powering up of the poster can be carried out by performing a very precise positioning of the ring on the periphery of the fabric and respecting very constraining manufacturing ribs for the various elements of the frame, the fabric and the fabric. reported rush. Furthermore, if during the establishment of the poster on the frame, a tensioning without fold can be achieved, when the canvas is arranged outside it happens that under the effect of an external element such as the wind in particular, it relaxes by forming unsightly folds on its surface. In this case, it is necessary to replace the canvas with a new fabric. Such a replacement is expensive, especially since the dimensions of the fabric are important.

Thus, the object of the invention is to allow readjustment of the tensioning of the fabric on a frame when the fabric has relaxed.

Another object of the invention is to allow greater tolerance at the ribs manufacturing the fabric but also the frame and the rod. MANNER OF REALIZING THE INVENTION

As already mentioned, the invention firstly relates to a rod intended to be attached at the edge of a web to maintain the tension of the canvas by insertion into a continuous groove arranged at the periphery of a frame .

According to the invention, this ring is characterized in that it comprises:

three fins, each fin comprising at its apex an edge and each edge extending parallel by defining a prism with a triangular base; - A flat attachment zone capable of allowing the fastening of the edge of the fabric with the ring; and in that at least one of the three edges may comprise a displacement capacity towards another edge

In other words, the three fins are used to define a prismatic volume in space, whose section is inscribed in a triangle whose vertices are formed by the edges of the fins. Such a three-dimensional arrangement of the three edges allows in particular to gradually insert the rod inside a groove in the manner of a zipper type "zip". Similarly, the extraction of the ring outside the throat can also be carried out gradually as a zip.

In this way, it is possible to deform the ring by bringing two fins together and thus allow the rod to be inserted into a housing having at least one narrowing so as to prevent the rewinding of the rod once. introduced and deformed into a groove.

Furthermore, the attachment zone extends parallel to the immediate proximity of the prismatic shape defined by the three fins along the entire length of the rod. One of the three edges may be inscribed in the plane defined by this snap zone.

Thus, the other two edges extend parallel to each other on the plane defined by the attachment zone and the two corresponding fins generate excrescences. emerging from this plane that can generate non-return means when the rod is inserted into a continuous groove.

In practice, the three fins can be shifted 120 degrees relative to each other.

Thus, the edges of the ring may be angularly offset around an axis of rotation. The angle of rotation between each fin is advantageously 120 degrees.

Advantageously, each pair of edges can be connected by at least one wall of fins.

In other words, when the adjacent walls of two fins form flat faces, they can be coplanar and in this case, they form a single wall of fins common to the two adjacent fins. They may also not be coplanar and generate two separate wing walls. Indeed, according to this first variant, the fin walls can be flat.

According to a second variant, the fin walls can be convex. In this case, the fins may emerge partially from the triangular base defined by the three edges.

According to a third variant, the fin walls can be concave. In this case the fins are inscribed in the triangular base formed by the three edges.

In practice, the base of the prism can form an isosceles triangle. In this way, at least two of the three sides of the triangle have an equal length.

The invention also relates to a display fabric equipped at one of its selvedges with a rod carrying a planar attachment zone capable of allowing the fastening of the edge of the fabric with the rod, the latter being suitable for cooperate with a profile intended to form all or part of a frame. In other words, the rod as previously described may be associated by welding at its attachment zone with a flexible sheet made of a material compatible with that of the ring. The sheet and the rod, once associated, then form a monolithic display screen adapted to be arranged on a particular display panel.

Furthermore, the invention also relates to the system for holding a fabric under tension by insertion into a continuous groove arranged at the periphery of a frame. This system comprises a profile intended to form all or part of the frame by defining the groove and having at least one rib arranged in the longitudinal direction of the profile and emerging from a first inner face of the groove.

According to the invention, this system is characterized in that it comprises a rod such as previously described reported at the edge of the fabric and to maintain the canvas under tension on the frame.

Therefore, the invention also relates to the assembly formed by a display fabric equipped at one of its selvedges of a rod which is introduced into a groove of a frame so as to realize both the keeping the fabric on the frame and turning it on so as to remove creases on its surface. The particular shape of the rod and the groove thus allows for a gradual introduction and extraction in the manner of a zipper type zip, by a suitable rotation of the rod combined with a translation in the groove. These operations can be advantageously performed using a cursor. The extraction can also be done by a simple manual action.

Advantageously, the rib can be oriented towards the bottom of the groove. In this way, when one of the fins of the rod penetrates inside the groove and approaches the bottom thereof, the rib then performs the function of a non-return means preventing this fin, and therefore the rod , to come out of the throat.

In practice, the profile may comprise a plurality of ribs arranged parallel to one another. Thus, it is possible to achieve different levels of power of the canvas according to the conditions of the external environment, including wind. It is also possible to proceed with the power of a canvas that would have relaxed after a few days use or because of external stresses.

Such a maintenance system thus makes it possible to extend the duration of an advertising campaign by means of the same poster arranged on a frame.

According to a particular embodiment, the ribs may comprise different inclination slopes.

In this case, it is possible to adapt the tear resistance of the rod inserted inside a groove according to its position inside the groove. Indeed, the more the rod is introduced deep inside the groove, the more the rod rotates about an axis of revolution, which generates a different position of the fins at each level of introduction. As a result, the slope of the ribs is adapted according to the orientation of the fin which comes into contact with it.

The groove can be defined in different ways and in particular it can be formed only by the profile. It can also be defined by, firstly the profile, and secondly a frame on which the profile is attached or by a wall on which the profile is reported.

Thus, according to a first embodiment, the groove may be defined by a second planar inner face of the profile, the first and second inner faces of the groove being arranged parallel to one another.

In this case, the profile can form alone the frame on which is reported the display screen. It can also be attached to an existing frame, in particular to allow the adaptation of this holding system on a display panel comprising a display screen holding system which is different from the previously described holding system. According to a second embodiment, the groove may be defined by a planar face of the frame, the first inner face of the profile and the flat face of the frame being arranged parallel facing one another.

According to this variant, the profile is necessarily attached to a frame so as to define a groove between the first inner face of the profile and a flat face of the frame. Such a profile can be reported also on existing frames, so as to replace a different holding system and not having the advantages of the invention.

According to a third variant, the profile can also be directly attached to a flat wall such as a wall or a partition. In this case, the groove is defined by the first face of the profile and a flat face of the wall arranged parallel opposite.

Advantageously, the flat face may comprise streaks. In other words, the flat face of the frame or of the profile for defining the groove has a microrelief for improving the adhesion of at least one fin of the ring when the display fabric is energized. Thus, the streaks improve the tear resistance of the ring inside the groove when the poster is powered.

In practice, the first inner face of the profile and the smooth face may comprise a pivoting capacity relative to the bottom of the groove.

Thus, when the rod is inserted inside the groove, and when it has a high rigidity, it allows to deform the groove at the passage of the various ribs present on the inner face of the profile. In this case, it is not necessary for at least one of the three edges of the ring to have a displacement capacity in the direction of another edge. To do this, a profile of thermoplastic material can be made and in particular be used for interior applications, such as frames comprising a decorative display fabric, a painting cloth or a photograph printed on a textile web. Moreover, the profile can be arranged in a plane of parallel to the plane of the poster. This type of positioning makes it possible to position the device in particular on a flat wall.

Another type of positioning called "full face" is nevertheless to hide a portion of the profile by making visible only the wing comprising the first inner face of the profile. Indeed, in this case the profile is arranged perpendicular to the plane of the poster. Thus, the poster can cover either the flat face of the frame or the second face of the profile.

SUMMARY DESCRIPTION OF THE FIGURES

The manner of carrying out the invention as well as the advantages derived therefrom will clearly emerge from the description of the embodiment which follows, given as an indication and not by way of limitation, in support of the figures in which:

FIG. 1 is a perspective view of a frame equipped with a fabric according to the invention; FIG. 2 is a sectional view of the profile making it possible to produce with a ring a system for holding a fabric; according to the invention; 3 is a perspective view of a rod according to the invention; FIGS. 4 to 7 are cross-sectional views of different variants of the rod.

Figures 8 to 10 are sectional views showing the establishment of the rod in the profile, keeps it under tension of the fabric and the extraction of the rod.

MANNER OF REALIZING THE INVENTION

As already mentioned, the invention relates to a display screen and its support system on a frame.

As shown in Figure 1, such a display fabric (3) can be tensioned relative to a frame (1) in different ways. As shown in Figure 2, the frame (1) can be completely formed by a profile (11) for defining a groove (12). This groove (12) is defined by means of a first inner face (14) and a second inner face (16) facing one another.

The first inner face (14) has a plurality of ribs (13) inclined towards the bottom (15) of the groove (12). Furthermore, the second inner face (16) may comprise grooves arranged parallel to the ribs (13) so as to improve the pull-out resistance of the rod (4) enabling the display to be tensioned ( 3).

In this embodiment, the first internal face (14) comprises four ribs (13) so as to achieve four levels of tensioning of the fabric to in particular adapt to a particular external environment or to allow a subsequent adjustment of the when a display fabric (3) has relaxed.

In the variant shown, the display fabric (3) is attached at its selvedge (5) to a substantially planar hooking zone (41).

As shown, the profile (11) is arranged perpendicularly to the plane of the display fabric (3) so as to hide a portion of the profile (11) below the display fabric (3) to impart an effect " full face "to the holding system under tension.

In this case, the second inner face (16) may comprise, at the opening of the groove (12), a bead (42) allowing both to avoid wear of the attachment zone (41). ) in contact with the profile (11), but also to increase the effect "full face" of the display panel. Indeed, in this case, it is possible to position the selvedge

(5) of the poster closer to the first inner face (14) of the profile (11). The frame (1) is almost invisible to a person looking at the poster (3).

In other applications, especially where the profile is arranged on a flat wall or a frame parallel to the plane defined by the poster, such a bead (42) is not useful and the profile may therefore be devoid of it. As shown in Figure 3, the rod (4) has at least three edges (7, 8, 9) defining three fins (27, 28, 29). Thus, each pair of edges (7, 8, 9) is connected by at least one wall of fins (17, 18, 19). As shown in this embodiment, the fin walls form a prism (40) with a triangular base, however the invention also covers any rod whose edges (7, 8, 9) extend parallel by defining a prism (40) triangular base.

In this variant, the ring (4) also comprises a hooking zone (41) for fastening a display fabric at its edge.

As shown in FIG. 4, the rod (54) can also be defined by means of edges (8, 9) interconnected by two fin walls (58, 59) extending in a flat manner and being secured to each other with a hooking portion of the fabric. These three edges (7, 8, 9), however, also define a prism (40) with a triangular base and form a tripod in a plane transverse to the ring.

As shown in Figure 5, the rod (64) may comprise fin portions (67, 68, 69) of convex shape and for connecting each pair of fins (7, 8, 9).

As shown in FIG. 6, the rod (74) may comprise edges (7, 8, 9) each defining a band rather than a line, each pair of edges (7, 8, 9) being connected by two concave zones (78, 79) and a substantially flat area (77).

It is clear that the three edges (7, 8, 9) make it possible to define a prism with a triangular base whose vertices are chamfered.

As shown in Figure 7, the rod (84) may comprise three fins, one having a different length. Indeed, the fin (80) ends with an edge (9) tangent with a circle of diameter greater than that tangent with the edges (7 and 8). In this case, the edges (7, 8, 9) form strips of curved section and also make it possible to define a triangular base prism whose vertices are blunted. As shown, the rod (84) has in its insertion direction inside the groove, a height (a) less than the height (b) corresponding to the position in which the rod (84) is located when the display screen is turned on. In this way, the introduction of the ring inside the groove is possible without special effort, then the rotation of the ring inside the groove makes it possible to position the ring in contact with the ribs of the profile.

Furthermore, a bead (81) can be positioned at the level of the plane attachment zone of the ring (84) so as to facilitate the setting in position of the poster before achieving its joining by welding in particular.

As shown in Figure 8, the rod (34) has a height (b) between the two edges (7) and (8). Before proceeding to its introduction into the profile (21), this height (b) is greater than a coast (c) corresponding to the distance between the flat face (26) and the lower ends of the ribs (23).

As shown in Figure 9, the introduction of the rod (34) is achieved by exerting a thrust force at the junction between the attachment zone (41) and the fin comprising the edge (8). This thrust force has the effect of bringing the two edges (7) and (8) to one another and direction of the attachment zone (41).

Such a thrust force can be achieved in multiple ways and in particular by using a tool (42) having a rounded edge whose thickness is substantially narrow to penetrate inside the profile (21).

As shown in Figure 10, each passage of the rod (34) beyond a lower end of a rib (23), the fins return to their original shape and the edges (7) and (8) deviate from each other.

As shown in Figure 11, once the poster (5) energized, it exerts a tensile force on the attachment zone (41) of the ring. This effort of the order of 100 daN / m may cause a slight pivoting of the fin (9) towards the flat face (26). As shown in Figure 12, such an assembly can withstand external stresses applied to the fabric, such as wind in particular. Tests have shown in particular that in the extreme position shown, the force on the rod is of the order of 800 daN / m. This additional constraint has the effect of pressing the two edges (7) and (9) in contact with the flat face (26) and to move the edges (7) and (8) away from each other.

As shown in Figure 13, the extraction of the rod is performed by rotating it on itself by a manual action of an operator. This rotational movement detaches the edge (7) of the flat face (26) and the approximation of the edges (8) and (9).

As shown in Figure 14, when the distance between the edges (8) and (9) is equal to the coast (c) the rod is then line out of the profile by performing a transverse translation movement below the various ribs (23) of the profile (21).

Furthermore, Figures 8 to 14 show a planar wall forming with the profile (21) the entire frame. In this case, the first inner face (24) of the groove (22) faces a flat face (26) of the frame (2).

It follows from the foregoing that a rod, a display screen and a holding system in accordance with the invention have many advantages and in particular: they make it possible to adapt the tension of the fabric according to the conditions of the external environment ; they allow a subsequent adjustment of the tension when folds are displayed on the surface of the display screen; they do not require complex tools to introduce the rod inside the groove; they make it possible to implement and dismantle progressively the poster on a frame in the manner of a zip; they can make it possible to equip existing panels and do not require the design of particular frames.

Claims

1. Ring (4, 34, 54, 64, 74, 84) intended to be attached at the level of the selvedge (5) of a fabric (3) in order to keep said fabric (3) under tension by insertion into a continuous groove (12, 22) arranged at the periphery of a frame (1, 2) and characterized in that it comprises:

- three fins (27, 28, 29), each fin (27, 28, 29) comprising at its apex a ridge (7, 8, 9), said ridges (7, 8, 9) extending in parallel defining a prism (40) with a triangular base; - An attachment zone (41) planar capable of allowing the joining of the edge (5) of the fabric (3) with the rod (4, 54, 64, 74, 84); and in that at least one of the three edges (7, 8, 9) has a displacement capacity towards another edge.

2. Ring according to claim 1, characterized in that the three fins (27, 28, 29) are offset by 120 ° relative to each other.

3. Ring according to claim 1, characterized in that one of the three edges (9) is concurrent with the plane defined by said attachment zone (41).

4. Ring according to claim 1, characterized in that each pair of edges (7, 8, 9) is connected by at least one fin wall (17, 18, 19, 58, 59, 67, 68, 69 , 78, 79).

5. Ring according to claim 4, characterized in that said fin walls (17, 18, 19, 58, 59) are planar.

6. Ring according to claim 4, characterized in that said fin walls (67, 68, 69) are convex.

7. Ring according to claim 4, characterized in that said fin walls (78, 79) are concave.

8. Ring according to claim 1, characterized in that the base of the prism (40) forms an isosceles triangle.

9. Display fabric (3) equipped at one of its edges (5) of a rod (4, 54, 64, 74, 84) according to claim 1 and adapted to cooperate with a profile (11, 21) for forming all or part of a frame (1, 2).

10. System for keeping a fabric (3) under tension by insertion into a continuous groove (12, 22) arranged at the periphery of a frame (1, 2), said system comprising a profile (11, 21) intended to forming all or part of the frame (1, 2) by defining the groove (12, 22) and comprising at least one rib (13, 23) arranged in the longitudinal direction of the profile (11, 21) and emerging from a first internal face (14, 24) of the groove (12, 22) characterized in that it comprises a rod (4, 34, 54, 64, 74, 84) according to one of claims 1 to 8 reported at the level of the selvedge (5) of the fabric (3) and making it possible to keep the fabric (3) under tension on the frame (1, 2).

11. Holding system according to claim 10, characterized in that said at least one rib (13, 23) is oriented towards the bottom (15, 25) of the groove (12, 22).

12. Holding system according to claim 10, characterized in that the profile (11, 21) comprises a plurality of ribs (13, 23) arranged parallel to one another.

13. Holding system according to claim 12, characterized in that the ribs (13, 23) have different inclination slopes.

14. Holding system according to claim 10, characterized in that the groove (12, 22) is defined by a second flat inner face (16) of the profile (11), said first (14) and second (16) internal faces. groove (12, 22) being arranged parallel to each other.

15. Holding system according to claim 10, characterized in that the groove (12, 22) is defined by a flat face (26) of the frame (2), said first inner face (24) of the section (21) and said flat face (26) of the frame (2) being arranged parallel facing each other.

16. Holding system according to one of claims 14 or 15, characterized in that said flat face (16,26) comprises streaks.

17. Retention system according to one of claims 14 or 15, characterized in that said first inner face (14) profiled (21) and said smooth face (16, 26) comprise a pivoting capacity relative to the bottom (15). , 25) of the groove (12, 22).