FR2837968A1 - DISPLAY DEVICE COMPRISING A CANVAS TENSIONED ON A FRAME - Google Patents

Abstract

Display device comprising a stretched canvas (6) equipped on at least two of its opposite sides with a lateral ring (8), and a mechanism for tensioning the canvas with respect to a fixed structure, cooperating with the rods said opposite sides of the fabric, characterized in that the tensioning mechanism comprises a plurality of profiled elements, namely: - on a first side of the fabric:. a first section (10) integral with the structure ,. a second section (20) mounted on the web of the fabric, and cooperating by hooking with the first section (10), - on the opposite side of the fabric:. a third section (33) integral with the structure,. a section cooperating with the ring located on the opposite side of the fabric, and comprising a zone forming a hook (24) ,. a fifth element (50), forming a tensioning member, capable of pivoting relative to the structure, and cooperating with the profile associated with the ring.

Description

Electronic processing and / or display system (11).

  DISPLAY DEVICE COMPRISING A FABRIC TENSIONED ON

A FRAME

  - Technical field The invention relates to the field of display, and more specifically of the display using supports made of stretched canvas, made for example of fabric coated with a plastic material such as PVC, or with a film made of plastic. The invention relates more particularly to a display system whose mechanism for tensioning the fabric is easy to implement in multiple applications, while being particularly adaptable to the geometric tolerances of the fabric and of the structure receiving the mechanism hanging

the Web.

  The invention finds very particular applications in the field of advertising packaging for trucks having rigid walls. The invention can also be declined in various types of applications necessary where a stretched canvas is displayed, whether on fixed or mobile structures, exposed or not

  outside weather. In the following description, the invention will be described

  more particularly in the application to the advertising cladding of walls of

  trucks, without this constituting a limitation of the scope of the invention.

  PRIOR ART In general, the walls of trucks constitute relatively large spaces, and which therefore form predestined surfaces.

  to accommodate advertising displays, more generally informative.

  However, the use of truck walls as advertising space

  remains limited, since it is subject to various constraints or obligations.

  Thus, it is frequently admitted that for an advertising message to have all its attractive force, it must be frequently replaced, and this at

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  rhythm of advertising campaigns. There is therefore a need to be able to interchange the display media that are capable of being installed on the sp o r of a truck, and this in contrast to solutions in which the advertising messages are directly painted, and this therefore almost definitively on the walls of a truck. Among the solutions making it possible to equip the carnion tarpaulins with a canvas capable of containing an advertising message, the Applicant uses a technical solution described in document EP 0 294 301. This solution uses a display medium, which can for example be a coated fabric which is fitted on two or four of its sides with a side rod forming a bead. This bead is placed inside a tensioning mechanism formed by different profiles trapping the peripheral ring of the fabric. Although it has multiple advantages, and it is widely exploited, this solution has disadvantages for certain applications, in particular in the application of advertising cladding for truck walls. Indeed, the profiles used in this prior solution are of relatively large sizes, which results in a shift between the display fabric and the support on which the profiles are placed. In addition, this solution is not perfectly suited in cases of

  figure o the support receiving the profiles has geometric irregularities.

  A problem that the invention seeks to solve is to allow the establishment of a stretched fabric with the possibility of adapting to configurations in which the support on which the display device is installed has geometric irregularities . Another problem that the invention seeks to solve is that of allowing display of excellent flatness, despite certain tolerances existing on the dimensions of the canvas, or even on its

  elongation capacity when energized.

  Another problem which the invention seeks to solve is that of providing a system which is easy to implement, while being particularly resistant.

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  the constraints that can be observed when the display media are subjected

  to external conditions, and in particular to the forces exerted by the wind.

  Expose of the invention The invention therefore relates to a display device which comprises on the one hand a stretched canvas equipped on at least two of its opposite sides with a lateral rod, and on the other hand a mechanism for tensioning of the fabric relative to a fixed structure, this tensioning mechanism cooperating with the rods of the

opposite sides of the canvas.

  According to the invention, the tensioning mechanism comprises

a plurality of profiles.

  Thus, on a first side of the fabric, the mechanism comprises a first profile, which is integral with the structure, and which comprises at least one rib inclined towards the outside of the structure. The mechanism also comprises on this side of the fabric, a second profile, one end of which has a groove which is capable of trapping the rod located on the side of the fabric, and the other end of which

  cooperates by hooking with the rib located on the first profile.

  On the opposite side of the fabric, the tensioning mechanism includes three additional profiles. The third profile is integral with the structure, and it includes a stop which is oriented towards the outside of the structure, so as to form a housing for a pivot point. The system also includes a fourth profile, one end of which has a groove capable of trapping the rod located on the opposite side of the fabric, and the other end of which has a zone forming a hook. The mechanism also includes a fifth element, which forms a tensioning member. This fifth element has an end which cooperates with the stop of the third profile to allow the pivoting of this fifth element relative to the structure. This fifth element also includes at least one rib cooperating with the hook zone of the fourth profile. Finally, the fifth element comprises the locking means relative to the third profile in the position where the fabric is put

under pressure.

  In other words, the tensioning mechanism combines the use of various profiles. On one side of the fabric, which can be, for example the upper side, the fabric is held in a profile comprising a drop tube. This profile is hung on the first profile integral with the structure to allow the maintenance

  of, for example, the upper end of the canvas.

  On the opposite side, and for example at the lower end of the canvas, the rod present on the canvas is also placed in a drop tube which cooperates with the fifth element acting as a lever and a power up. This fourth profile can be hung on the tensioning member

  which can itself be pivoted relative to the third profile fixed to the structure.

  The pivoting of the tensioning member causes the profile to move

  secured to the edge of the canvas, and therefore the tensioning of the latter.

  It is understood that this tensioning mechanism is particularly advantageous, since it is produced only on the basis of profiled elements which can be obtained at competitive cost prices. In addition, the use of profiles ensures tensioning of the fabric over the entire length of one side, which ensures excellent uniformity of the tension applied to the fabric, and therefore

optimal flatness.

  Advantageously in practice, the profiles cooperating with the rod of the fabric, also called second and fourth profiles, are the same on both sides of the fabric, both to cooperate with the profile ensuring the attachment of the first side, and the element ensuring the tensioning on the opposite side. The use of the same lirnite profile of course the number of different parts in the

  mechanism thus simplifying its installation and its realization.

  J In practice, the profiles cooperating with the rods of the fabric, also called second and fourth sections, are produced in the form of successive segments, of unit length less than the length of the side of the fabric on which they are placed. Thanks to this arrangement, it is relatively easy to set up these different profiles on the rod of the canvas by threading the groove of the profle on the rod, and sliding this profle along the length of the side of the

- canvas.

  However, in some applications in which the canvas is relatively short, a single segment of profile can be used to

cover the length of the canvas.

  In the same vein, the mechanism in accordance with the invention can be used on the four sides of a tack canvas, when it is necessary to keep the canvas under transverse tension in these two directions. However, when the dimensions and applications allow it, it may be sufficient to maintain only two opposite sides of the fabric. In the same way, the fabric can have a rectangular or four-sided shape, but the device can also be declined for other s s of s of polygonal type es, preferably with an even number of sides, and sides opposite opposite of each

others and parallel.

  In practice, it is preferred that the fifth element, forming the tensioning member is in the form of several punctual pieces, of short length, distributed over the length of the side on which they act. This arrangement makes it possible to adjust the voltage applied to the

  canvas at different discrete points distributed along the length of the side of the canvas.

  In practice, it will be preferable for these tensioning members to be placed at the junctions between the different segments of the profiles cooperating with the rods of the fabric. In other words, by this arrangement, the forces exerted on the profile receiving the rod of the canvas are exerted at each

  end of the segments, which ensures good stability of the assembly.

  C on form to an ec aractéri s tic of the inventi on, the c in which th element, S forming a tensioning member, has several offset ribs allowing different hookings of the profile cooperating with the rod, so as to allow different power-up intensities. In other words, the attachment of the profile as associated with the canvas can be done at different levels from the pivoting element forming the tensioning member. In this way, the tension exerted on the fabric can be adjusted by choosing the appropriate rib. This system also makes it possible to compensate for variations in geometry due either to the making of the canvas, or to the installation of the proflés on the fixed structure. It is thus possible to ensure an almost uniform tensioning over the entire length of the

canvas, despite this type of defect.

  Furthermore, according to another characteristic of the invention, the first profle, fixed to the structure may comprise several inclined ribs making it possible to arrange the first side of the fabric at different levels of the structure, so as to compensate for geometric deviations of the canvas and / or the structure. In the same way, this plurality of hooking positions of the end, for example upper of the fabric, makes it possible to correct production faults which go beyond the possibilities of compensation offered by the adjustment located on the

opposite side.

  Advantageously in practice, the mechanism may include means for locking the hooking of the profiles cooperating with the rod, opposite the ribs located on the first profile and the fifth element. In other words, the attachment of the profile as a company to the canvas is obtained effectively, by limiting the risks of unexpected detachment, by defining the forms of cooperating zones.

  between them to ensure this attachment.

  In the same spirit, the mechanism may include means for locking the engagement of the pivoting ensuring the function of the tensioning member relative to the proflés fixed on the structure. This in particular makes it possible to prevent the pivoting profile, ensuring the tensioning, from becoming detached from its pivoting point during handling of placing under

canvas tension.

Brief description of the unbelievers

  The manner of carrying out the invention as well as the advantages which flow therefrom

  will emerge clearly from the description of the embodiment which follows, in support of

  attached figures in which: Figures 1 and 2 are two side views of a truck equipped with the device

  display according to the invention.

  Figure 1 shows the wall of the truck fitted with different profiles

  characteristics, before placing the canvas.

  Figure 2 shows the wall of the truck when the canvas is in place.

  Figures 3 to 6 are sections of the characteristic sections.

  Figures 7 and 8 are detail side views showing the cooperation between the first and the second section on which the fabric is mounted, and this

  respectively at two stages of assembly operations.

  Figures 9 and 10 are also detailed views of the cooperation of the third, fourth and fifth sections, respectively before and after placing

under tension of the fabric.

  Figure 11 is a front view of a segment of the fifth element.

  FIG. 12 is a detailed view of the lower part of the display device,

  illustrating the ability to adjust the tension of the poster.

  Manner of Realizing the Invention As already mentioned, the invention relates to a display device which can, for example but not limited to, be used to equip rigid walls of trucks. Thus, as illustrated in FIG. 1, the wall (1) of the truck is equipped with four lengths of profiles. On the upper side, the wall (1) receives a profile element (2). An element (3) made from the same profile is also arranged on a vertical side of the wall (1). These elements (2, 3) are produced from the profile of a first type (also called first profile in the rest of the

  description). On the opposite sides, the wall (1) is equipped with two elements (4, 5).

  These elements (4, 5) are made from a profiled auke (also called

  third section in the rest of the description). These profiles are of widths

  slightly different, since the elements (2 and 3) are intended to receive the hanging of the canvas, while the elements (4, 5) are intended to receive the

  tensioning and locking devices.

  As illustrated in FIG. 2, the wall (1) is intended to receive the fabric (6) by means of different segments (7) produced from the same profile

  (also called second or fourth profle in the rest of the description),

  and which cooperates with the rod (8) present on the periphery of the fabric (6). These segments (7) of the second profile are hung on ribs present on the elements (2 and 3) of the first profile. On the opposite sides, the elements (7) are held relative to the elements (4 and 5) of the third profile by means of tensioning members (8), distributed over the length of the fabric, and

  themselves fixed on the elements (4, 5) of the koisième profile.

  The forms of an exemplary embodiment of the profiles are illustrated in FIGS. 3 to 6. Thus, the first profile (10), making it possible to produce the elements (2 and 3) of the figure, is illustrated in FIG. 3. This profile (10) has at its ends a flat area (11, 12) by which it can be fixed on the wall (1) of the truck, more generally on the fixed skucture. In its central zone, the profile (10) comprises identical curved ribs (13, 14, 15). Each of these ribs (1315) therefore defines a housing (16) oriented upwards in the example illustrated, and therefore more generally towards the outside of the support structure. This housing (16) has a bottom which is substantially cylindrical, to allow pivoting movements by rotation. Typically, this profile (10) has a length of the order of ten centimeters. This profile (10) is intended to receive the profile (20) as illustrated in FIG. 4. This profile (20) has at one of its ends a groove (21) forming a drop tube, and having a slot (22) intended to receive the connecting portion (18) connecting the rod (8) to the fabric (6), as illustrated in FIG. 7. The shape of the groove (21) and that of the rod (8) are determined to ensure good resistance to tearing, while facilitating the sliding of the

  rod (8) inside the groove (21) during the positioning operations.

  At the opposite end, the profile (20) comprises a zone (23) forming a hook, and comprising at its end a bulged zone (24), having a radius of curvature substantially identical to that of the housing (16) of the profile (10 ). The curved area (23) is connected to the groove (21) by a substantially inclined connecting portion (25). This portion (25) has on its face oriented on the side of the hook (23) a rib (26) defining between itself and the bulged part (24) a housing (27), of dimension substantially equivalent to that of the rib

(14) of the profile (10).

  The length of the rib (26), therefore defining the depth of the housing (27) is chosen to prevent the risks of the profile (20) falling off by

relative to the profile (10).

  The profile (20) illustrated in Figure 4, is that which equips the upper part of the fabric (6), but also the lower end of the fabric, on the opposite side. This profile (20) is therefore intended to cooperate with the element (50) illustrated in FIG. 6

  (also called fifth element in the rest of the description). This

  fifth element (50) cooperates with the profile (30) (also called

  third profile) illustrated in Figure 5.

  More specifically, the profile (30) has a generally flat shape, and

  has an end (31) by which it can be fixed to the support structure.

  - 10 Another portion (32) of the flat area can also be used to form a

  second attachment point relative to the fixed structure.

  According to another characteristic of the invention, this profile (30) comprises a rib (33) forming a stop, oriented towards the outside of the structure, and that is to say in the example of embodiment, towards the low. This rib forms a stop, and therefore defines a housing (34), also of cylindrical shape which can serve as a rotation zone by pivoting a part of the profile (50). The length of the rib (33), and more precisely the arc of a circle which it defines, is chosen to ensure an effect of

  satisfactory stop, and to avoid any risk of slipping of the element (50).

  In the illustrated form, the profile (30) also comprises in its lower part, a zone (35) defining a slide inside which can be moved hooking means, and typically a cleat (36) associated with a

screws (37).

  The profile (30) is intended to receive in the housing (34) one end of the element (50) illustrated in Figure 6. More specifically, this element (50) has at one of its ends a bulged portion (51) typically of cylindrical shape, and of a diameter substantially equal to that of the housing (34) of the profile (30). Near the bulged area (51), the element (50) has a rib (52), also in an arc, which defines a housing (53) around a portion of the periphery of the bulge (51). This housing (53) is intended to receive the rib (33) of the profile (30) when the pivoting movement is engaged. The width of the housing (53) is therefore defined to be substantially equal and slightly

  less than the thickness of the width (33).

  In its middle portion, the element (50) has three ribs (54, 55, 56) oriented towards the outside of the structure, and conforming to a generally cylindrical shape. Each of its ribs defines a housing (57) capable of accommodating the bulge (24) of the profile (20) illustrated in FIG. 4, and therefore having

compatible diameters.

  At its end opposite the bulge (51), the element (50) has a zone (58) offset from the central portion (59). This portion (58) is intended to come to bear on the groove (35) of the profile (30). On its internal face, oriented towards the structure, this portion (58) has a rib (60) intended to serve as a stop against the upper face (38) of the groove (35). The portion (58) of the element (50) can be pierced with different housings, and preferably with housings opening out laterally, so as to receive the screws (37) arranged on the

profile (30).

  The installation of different profile elements relative to each other

  others are illustrated in Figures 7 to 10.

  So, in a first step, the canvas is put in place by its end

  1S upper on the element (2) of the tensioning mechanism.

  As illustrated in Figure 7, the fabric is first equipped with different

  profile elements (20) which are threaded through their groove (21) on the rod (8).

  Typically, the profile segments (20) have a length of the order of 80 cm to 1 meter, so as to allow their easy handling and their sliding without difficulty around the rod (8). When the upper end of the fabric is fitted with

  profiles (20), the latter are placed on the profile (10).

  More specifically, the bulge (24) is placed in the housing (16) of the profile (10). To do this, it is necessary that the profile (20) is inclined

  sufficient angle, and typically greater than 60 relative to its final position.

  This is necessary so that the rib (14) penetrates inside the housing (27) formed in the profile (20). This makes it possible in particular to avoid any risk of tearing off when the fabric is put in place, or during installation maneuvers. When the set of profiles (20) is put in place with respect to the profile (10), the fabric (6) is therefore hooked by its upper end and can hang vertically, in the configuration illustrated in FIG. 8. In the illustrated example, the second section (20) is hooked relative to the first section (10) at the intermediate rib (14), but this attachment could take place at the other ribs (13, 15) depending on the tolerances on the dimensions of the canvas and

  on the positioning of the profile (10) relative to the structure.

  Subsequently, the operator hooks up the free ends and their

  power up, as shown in Figures 9 and 10.

  Thus, it is necessary to equip the lower end of the fabric (6) with profile segments (20), by sliding them on the rod (8), in the same way as was done for the end. high. The operator then sets up parts (9) of the element (50) in position relative to the profile (30). To do this, it engages the bulge (51) of the element (SO) inside the housing (34) defined by the rib (33) Given the presence of the rib (52) for locking, the positioning of the element (50) takes place with an inclination of the latter relatively close to the vertical. Thereafter, the element (9) can be lifted

  to pivot relative to the bulge (51).

  The profile (20) is therefore located near the ribs (54-56) of the element (50), and the bulge (24) can then be inserted in the housing (57) defined by one of the ribs (54 -56). The choice of the rib in which the profile (20) must be placed is made as a function of the tension which it is desired to obtain on the canvas, or else to compensate for variations in the length of the latter, or else still positioning the profile (30) relative to the fixed structure. This situation is illustrated in figure 12, on which it is observed that the ends of the sections (20a), (20b) and (20c) are hung at levels

  different from the energizing elements (SOa, 50b).

  For this attachment to take place, it is necessary that the element (50) is sufficiently raised and pivoted so that the rib (55) can penetrate inside.

  the housing (27) defined between the bulge (24) and the rib (26) of the profile (20).

  Thereafter, it suffices for the operator to exert pressure on the area (58) of the element (50) so that a force is exerted on the fabric by means of the profile (20). This then leads to the situation illustrated in FIG. 10, in which the fabric (6) is under tension. The profile (20) is then locked in position relative to the

  profile (50) thanks to the penetration of the rib (55) inside the housing (27).

  I1 is then suitable for locking in position of the element (50) relative to the profile (30), by means of the screw (37). Because the segments (9) are of limited size, typically of the order of ten centimeters, it is possible to slide the screw (37) and the associated cleat (36) inside the slide for engage it in the housing (63) provided for this purpose in the part (58) of the element (50), as illustrated in FIG. 11. This element (50) can be produced from a profiled, with a constant section, or even be obtained by

injection; molding or the like.

  Of course, other locking modes than those illustrated in the figures can be used, as long as they ensure a firm and effective maintenance of the various sections with respect to each other, in particular in the case where the fabric is subjected to relatively large efforts, for example when it is

exposed to the wind.

  I1 emerges from the above that the display device according to the invention has multiple advantages, and in particular the fact that it can adapt very easily to variations in dimensions consecutive to the operations of making the canvas. , since it allows adjustment of the tension of the fabric at different points distinct from the length of the fabric. In addition, the fixing mechanism can adapt to different types of load-bearing structures, by being able to compensate for certain geometric defects, and in particular the phenomena of bending of load-bearing beams, or even variations in the dimensions of the load-bearing structure or in the angles formed by the different sides of such a supporting structure.

DREAM ND I CA T I O NS

  1 / Display device comprising a stretched fabric (6) fitted on at least two of its opposite sides with a lateral rod (8), and a mechanism for tensioning the fabric relative to a fixed structure, cooperating with the rods on said opposite sides of the fabric, characterized in that the tensioning mechanism comprises a plurality of profiled elements, namely: - on a first side of the fabric: a first profile (10) integral with the structure, and comprising at least one rib (13-15) inclined towards the outside of the structure, a second profile (20), one end of which has a groove (21) capable of trapping the rod (8) located on one side of the fabric , and the other end of which (24) cooperates by hooking with the rib (13-15) located on the first section (10), - on the opposite side of the fabric: a third section (30) integral with the structure, and comprising a stop (33) oriented towards the outside of the structure, 20 a fourth profile (40), one end of which has a groove (21) capable of trapping the rod (8) located on the opposite side of the fabric, and the other end of which has a hook-forming zone (23), element (50), forming a tensioning member, this fifth element having one end (51) cooperating with the stop (33) of the third profile (30) to allow the fifth element to pivot relative to the structure, the fifth element also comprising at least one rib (54-56) cooperating with the zone (23) forming the hook of the fourth profile (2 (1), the fifth element further comprising locking means (58) relative to the third profile in the position o the fabric is tensioned. 2 / display device according to claim 1, characterized in that the second and the fourth profle (20) cooperating with the rod of the canvas are identical. 3 / display device according to claim 1, characterized in that the second and the fourth profile (20) are made in the form of successive segments (7) of unit length less than the length of the side of the fabric (6) on which they are put in place, their being put in place by sliding

  of the groove (21) of the profle (20) on the rod (8).

  4 / display device according to claim 1, characterized in that the profile (50) forming tensioning member comprises several elements (9)

  of short length distributed on the side of the fabric.

  5 / display device according to claims 3 and 4, characterized in that

  the tensioning members (9) are placed at the junctions

  between the successive segments (7) of the profiles cooperating with the rod of the fabric.

  6 / A display device according to claim 1, characterized in that the fifth element (50) forming a tensioning member has several offset ribs (54-56), allowing different hookings of the profile (20) cooperating with the rod , so as to allow different power-up intensities. 7 / display device according to claim 1, characterized in that the first profle (10) has several inclined ribs (13-15) allowing to have the first side of the canvas at different levels of the structure, so as to in particular to compensate for geometric deviations of the fabric and / or of the structure. 8 / display device according to claim 1, characterized in that it comprises locking means (26) of the attachment of the profiles (20) cooperating with the rod on the nervares (13-15; 54-56) the first profle (10) and the

fifth element (50).

  9 / display device according to claim 1, characterized in that it comprises locking means (35-38) of the engagement of the pivoting

  of the fifth element on the third profile.

Applicant: PRISMAFLEX INTERNATIONAL