FR2995119A1 - PLASTIC ADVERTISING DISPLAY COUPLING STRIP AND COUPLING DEVICE INCORPORATING SUCH BANDS. - Google Patents

Abstract

The invention relates to an advertising display coupling plastic strip comprising an adhesive-covered fastening zone (31A, 31B) (31A, 31B) and a coupling zone (32A, 32B). provided with at least two rows of parallel claws (320A, 320B), characterized in that at least one claw row (320A, 320B) is locally deformed to form a plurality of obstacles (4A, 4B).

Description

TECHNICAL FIELD OF THE INVENTION

The invention relates to a plastic strip mating advertising poster. It also relates to a device for coupling together advertising posters, advertising furniture in which are installed advertising posters coupled together by means of such a device, and a method of manufacturing the plastic strip. The invention relates to the general technical field of coupling devices formed of two plastic strips each comprising an adhesive-covered attachment zone and a coupling zone provided with claws of complementary shape intended to engage with each other. other. State of the art

In the display sector, there are known rolling billboards. Such advertising furniture is shown schematically in Figure 1. It generally comprises a support 1 intended to be fixed against a facade on a specific portal or on a roadway. Advertising posters 2 coupled to one another are arranged inside the support 1, and are rotated in front of at least one viewing aperture 10. In practice, the posters 2 are set in rotation. by motorized cylinders 11a, 11b for alternately arranging said posters in front of the opening 10. The posters 2 are connected by their upper edge and their lower edge by means of a specific coupling device 3. Such a device coupling is for example described in the patent documents FR 2.942.377 (TEBIB, PUMIGLIA) or FR 2.485.895 (FLEXICO-FRANCE) and shown schematically in Figure 2. It is formed of two plastic strips 30A, 30B each having a zone d adhesive-bonded fastener 31A, 31B 310A, 310B and a coupling zone 32A, 32B provided with at least two rows of claws respectively 320A, 320B. The claws 320A, 320B of each band 30A, 30B have a complementary shape allowing their inter-engagement and their joining by elastic deformation. The attachment areas 31A, 31B are glued at the upper and lower side edges of the posters 2 and the coupling of said posters is achieved simply by interengaging the claws 320A, 320B of each strip 30A, 30B. This type of coupling device is particularly advantageous because the strips 30A, 30B can be manufactured in long lengths by extrusion and then cut to the desired length. In addition, the coupling of the posters 2 between them is simple and fast. The coupling devices described in these patent documents are not entirely satisfactory. Indeed, during the rotation of the posters 2 by the motorized cylinders 11a, 11b, it appears a lateral translation of said posters relative to each other and therefore a relative lateral sliding of the strips 30A, 30B. "Lateral sliding" means a translational movement in the direction in which the rows of claws 320A, 320B are oriented. As can be seen in FIGS. 2 and 3, this sliding possibility is notably due to the fact that there is a clearance J between the claws 320A, 320B. This sliding is detrimental to the extent that it can lead to the locking of the motorized cylinders and the stopping of the scrolling of the posters. In practice, the operators lay strips of adhesive over all or part of the length of the strips. It is understood that this operation can be costly in time, labor and consumables. To remedy this problem, patent document FR 2.923.066 (BARGES ANN) discloses a binding device comprising, on the one hand, a male rail having a substantially U-shaped section, the ends of which are each provided with a bead of substantially circular section and, secondly, a female rail 10 in which said male rail intermesh. The female rail comprises at least two grooves adapted to receive the beads, said grooves having a substantially circular section complementary to that of said beads. This configuration eliminates the clearance between the male rail and the female rail, thereby increasing the friction zone between the two rails. The lateral sliding of the bands is in fact limited. This technical solution is however complex to implement because it is necessary to have a precise adjustment of the beads and grooves to induce an optimal friction. Also known from patent document WO 2011/148063 (LARGE, DARGENT), the use of rubber seal arranged in the claws to form a friction zone preventing movements or slippage bands. This solution is not satisfactory because it has been found that at relatively high temperatures (from 40 ° C), the seal was no longer effective and that the bands began to slide again. In view of this state of affairs, the main technical problem that the invention aims to solve is to perfect the plastic coupling strips of the type described in the patent documents FR 2,942,377 (TEBIB, PUMIGLIA) or FR 2,485,895 ( FLEXICO-FRANCE), in order to eliminate, or at least limit, the relative lateral sliding of said strips when they are rotated by the motorized cylinders. Another object of the invention is to provide a method of manufacturing a plastic coupling strip which is simple to implement and which is compatible with an extrusion technique. Yet another object of the invention is to propose a manufacturing method that can be applied to plastic coupling strips known from the prior art and of the type described above. Disclosure of the invention.

The solution proposed by the invention is a plastic advertising sign coupling strip, comprising an adhesive-covered attachment zone and a coupling zone provided with at least two rows of parallel claws. This band is remarkable in that at least one row of claws is locally deformed so as to form several obstacles. Applicants have indeed realized that these obstacles create stops that oppose the relative lateral sliding of said strips when they are nested one inside the other. It is therefore now mechanical contacts that are formed in the interstitial clearance separating the claws and no longer the friction zones as provided in the devices of the prior art mentioned above. Another aspect of the invention relates to a coupling device formed of two plastic strips each comprising an adhesive-covered attachment zone and a coupling zone provided with at least two rows of parallel claws, the claws of a first band being configured to engage in the claws of the second band and thus couple the two said bands. This device is remarkable in that: - at least one row of claws of the first band and at least one row of claws of the second band are deformed so as to form several obstacles, - 5 - - which obstacles are arranged so as to that the obstacles of the claw row of the first band abut against the obstacles of the claw row of the second band, to oppose the relative lateral sliding of said strips.

Other advantageous features of this device are listed below, each of these characteristics being able to be considered in combination or independently of the remarkable characteristics mentioned above: the two rows of claws of the first band preferably comprise several obstacles; two rows of claws of the second band preferably comprise several obstacles. - The obstacles are advantageously in the form of beads located in planes perpendicular to the direction of relative lateral sliding strips. these beads are preferably spaced apart from each other by 3 mm to 7 mm. - Advantageously, the rows of claws of the first band have a different color rows of claws of the second band. Yet another aspect of the invention relates to advertising furniture comprising a support inside which advertising posters coupled to each other are rotated in front of at least one viewing opening, said posters being coupled together by means of the device. conform to one of the above characteristics. A further aspect of the invention relates to a method of manufacturing an aforementioned plastic strip. This strip is obtained by extrusion, at least one row of claw then being deformed locally, advantageously by crushing or thermoforming, so as to form said obstacles. Description of the figures. Other advantages and characteristics of the invention will appear better on reading the description of a preferred embodiment which will follow, with reference to the accompanying drawings, carried out as indicative and non-limiting examples and in which: - Figure 1 above is a schematic cross-sectional view of advertising furniture type scroll panel, - Figure 2 above is a schematic cross-sectional view of a coupling device of the type described in the patent documents FR 2.942.377 15 (TEBIB, PUMIGLIA) or FR 2.485.895 (FLEXICO-FRANCE), - Figure 3 is a longitudinal sectional view along AA of the device of Figure 2, - Figure 4 is a schematic cross-sectional view 5 is a diagrammatic view in longitudinal section of a coupling device according to the invention; FIG. 6 is an enlarged view of detail D of FIG. the fi FIG. 7 is a diagrammatic view in longitudinal section of a coupling device according to the invention, a deformation member forming the obstacles on the periphery of a claw; FIG. 8A is a view schematic from above showing two coupling strips according to the invention, which strips are not engaged one inside the other; FIG. 8B is a diagrammatic view from above showing two coupling strips conforming to FIG. invention, which strips are properly engaged one into the other, FIG. 80 is a schematic top view showing two coupling strips according to the invention, which strips are not being properly engaged in each other. Embodiments of the invention The coupling device object of the invention adapts particularly well to all paper media for advertising display. It is placed on the posters either manually or using an automated machine. In a more general manner, it would be possible to use this coupling device as a closing or connecting member between any two objects, for example as a closure member of a garment, a bag, etc. Advertising posters 2 thus coupled are adapted to be implemented in an advertising panel of the pull-down type. Such advertising furniture is shown schematically in Figure 1 above. It comprises a support 1 intended to be fixed against a facade, on a specific portico or on a roadway. The posters 2 coupled to each other are arranged inside the support 1, and are rotated in front of at least one viewing aperture 10. In practice, the posters 2 are rotated by motorized cylinders 11a, 11b allowing alternatively arranging said posters in front of the opening 10. The posters 2 are connected by their upper edge and their lower edge by means of a specific coupling device 3. With reference to FIG. 8A, the coupling device object of the invention is formed of two strips 30A, 30B each having an attachment zone 31A, 31B covered with adhesive 310A, 310B and a coupling zone 32A, 32B provided with claws 320A, 320B. The latter are generally in the form of hook whose beak may be more or less inclined and / or curved. In practice, the attachment areas 31A, 31B are located at a longitudinal edge of the strips 30A, 30B and the coupling areas 32A, 32B are located on the opposite edge. For a first band 30A, the attachment zone 31A 5 and the coupling zone 32A are each disposed on a face distinct from said band. For the second band 30B, the attachment zone 31B and the coupling zone 32B are arranged on the same face. In this way, the attachment areas 31A, 31B are located on the same side when the claws 320A, 320B are nested (configuration similar to that shown in Figure 2). Coupling areas 32A, 32B are provided with at least two parallel claw rows 320A, 320B. The claws 320A, 320B extend in a direction parallel to the longitudinal edges of the strips 30A, 30B, which edges are generally straight but can be curved. The claws 320A, 320B of each band 30A, 30B have a complementary shape allowing their interengagement and their joining by elastic deformation. The strips 30A, 30B are properly engaged one into the other when the two claws 320A of the first band 30A are nested in the two claws 320B of the second band 30B (Figure 8B). Each strip 30A, 30B is initially stored as a coil and may have a length of several tens or even hundreds of meters. The strips 30A, 30B are automatically trancannées during winding. Before use, the strips 30A, 30B are cut along a length which is a function of the length of the lateral edges of the posters 2 to be coupled. In practice, the width of the strips 30A, 30B is about 18.5 mm, the width of attachment areas 31A, 31B of about 10 mm and the width of the coupling areas 32A, 32B of about 3 mm . Each of the strips 30A, 30B has a thickness of between 0.4 mm and 0.5 mm, preferably 0.45 mm. This thickness may be slightly less, but it is preferable that in any case the thickness of the connection separating the attachment zone 31A, 31B from the coupling zone 32A, 32B is between 0, 4 mm and 0.5 mm, preferably 0.45 mm. The thickness of this connection makes it possible, while retaining the flexibility of the strips 30A, 30B, to reinforce their resistance and to prevent them from tearing during the separation of the claws 320A, 320B. The latter have substantially the same thickness as the strips 30A, 30B and have a height of about 1 mm to 2 mm and are spaced apart by a distance of between 1 mm and 3 mm, preferably about 1.5 mm.

The strips 30A, 30B are preferably made of a plastic material based on thermoformed polypropylene. Other plastics such as polyethylene, polyester, polyvinyl chloride, etc. can also be used. The strips 30A, 30B, provided with their coupling zone 32A, 32B, are typically obtained by an extrusion process, although a molding method provides a similar result. The attachment zones 31A, 31B may be located in the same plane when the two bands 30A, 30B are coupled to each other (configuration similar to that shown in Figure 2). However, the separation of the claws 320A, 320B is easier if the attachment areas 31A, 31B are in two separate parallel planes. The attachment zone 31A, 31B can therefore be located above the claws 320A, 320B, substantially in the extension of the upper surface of the coupling zone 32A, 32B.

Each attachment zone 31A, 31B is covered with adhesive 310 and extends in a general direction parallel to the claws 320A, 320B. The adhesive 310A, 310B is preferably made of polyester, the tackiness of a material being approximately 19 N / 25 mm (according to the AFERA 4001 method). The adhesive 310A, 310B is in the form of one or more parallel lines, continuous or discontinuous, placed manually or automatically on the upper surface of the attachment zones 31A, 31B. In practice, the adhesive lines 310A, 310B are located at a distance of about 1 mm from the edge opposite the claws 320A, 320B. In order to preserve the properties of the adhesive 310A, 310B and prevent it from sticking to supports other than a poster 2 during the storage and / or handling of the strips 30, a peelable polypropylene protective film advantageously covers said adhesive. The establishment of a band 30A, 30B at a side edge of a poster 2 is relatively simple. After having cut a first strip 30A to the right length, the protective film is removed from the adhesive 310A, 310B. We can then paste it on a side edge of the poster 2. The same operation is performed at the side edge of another poster 2, but using the second 30B complementary strip. By simply pressing the thumb and the index finger, it is sufficient to engage the claws 320A, 320B of the two strips 30A, 30B so that they become solid.

According to the invention, and referring to Figures 4 to 8C appended, at least one claw row 320A, 320B of each band 30A, 30B is locally deformed so as to form several obstacles 4A, 4B. The claws 320A, 320B are deformed in the portion that exceeds the plane P of the coupling zone 32A, 32B (Figure 4). These obstacles 4A, 4B are similar to claws - or secondary teeth - arranged on the corresponding main claw 320A, 320B. The obstacles 4A, 4B are wholly or partially located in the initial interstitial clearance J separating the claws 320A, 320B when the strips 30A, 30B are coupled. As clearly shown in FIGS. 5 and 6, the obstacles 4A, 4B are arranged in such a way that the obstacles 4A of the claw row 320A of the first band 30A abut against the obstacles 4B of the claw row 320B. the second band 30B. These mechanical contacts are induced in the interstitial clearance J separating the claws 320A, 320B, in the direction in which said claws are oriented, that is to say in the direction of relative lateral sliding of the strips 30A, 30B. In fact, when the claws 320A, 320B are engaged, the obstacles 4A, 4B oppose the relative lateral sliding of the strips 30A, 30B. Applicants have found that the best results were obtained when the two rows of claws 320A, 320B had obstacles 4A and 4B. However, satisfactory results are obtained when only the two rows of claws of the first band 30A, or the second band 30B, comprise these obstacles 4A, 4B. Referring to Figures 4 and 8A, the obstacles 4A, 4B are in the form of beads located in planes perpendicular to the direction of relative lateral sliding strips 30A, 30B. In practice, when the claws 320A, 320B are deformed, the material flows a few tenths of millimeters on either side of said claws and forms these beads. These are preferably spaced from each other by a distance "a" of between 3 mm and 7 mm. The strips 30A, 30B thus retain a possibility of lateral sliding on this gap, which may be advantageous for precisely adjusting said strips together. In addition, the Applicants have found that with 30A, 30B strips with a length greater than or equal to 1 m (which is generally the case for advertising posters), and that with such spacing of obstacles, It was very difficult to slide the strips laterally, unless there was a very large effort, generally greater than the efforts likely to be made in advertising furniture. However, when only about 10 cm of strips are engaged, the lateral sliding of said strips remains relatively easy, at least manually, which is advantageous for their adjustment. Referring to Figure 7, the claws 320A, 320B are deformed by crushing or thermoforming. After extruding the strip 30A, 30B, a tool 5 of the punch, gear or other tool suitable to those skilled in the art, deforms, at regular intervals or not, the claws 320A, 320B. A heated tool 5 facilitates this deformation. In Figure 7, the tool 5 acts on the upper part of the claws 320A, 320B. However, it is conceivable to provide a tool 5 which acts on the lateral part of the claws 320A, 320B. In practice, it suffices that the tool 5 penetrates a few tenths of a millimeter into the claws 320A, 320B, so that the material flows and forms the obstacles 4A, 4B. This method is particularly advantageous because it makes it possible to quickly and simply form obstacles on any model of coupling strip, in particular those described in the patent documents FR 2,942,377 (TEBIB, PUMIGLIA) or FR 2,485,895 (FLEXICO -FRANCE) above.

According to another advantageous characteristic of the invention, the rows of claws 320A of the first band 30A have a different color from the rows of claws 320B of the second band 30B. This technical characteristic makes it possible to form a visual keying element as it appears more explicitly in FIGS. 8B and 8C. When the strips 30A, 30B are properly engaged with each other (Figure 8B), the claws 320A, 320B overlap each other so that said claws are not visible. But if the strips 30A, 30B are poorly engaged (Figure 8C), only one row of claws 320A, 320B of each band 30A, 30B are engaged. A row of colored 320B claw is then discovered and becomes clearly visible, indicating to the operator a bad assembly. The device which is the subject of the invention has been tested and validated for operation under an extreme temperature of approximately 100 ° during time slots of six hours over several days.

Claims (10)

REVENDICATIONS1. Advertising display coupling plastic strip, having an adhesive-coated attachment zone (31A, 31B) (310A, 310B) and a coupling zone (32A, 32B) provided with at least two rows of claws (320A, 320B) characterized in that at least one row of claws (320A, 320B) is locally deformed so as to form several obstacles (4A, 4B). A coupling device formed of two plastic webs (30A, 30B) according to claim 1, said webs each having an adhesive-coated attachment area (31A, 31B) (310A, 310B) and an area of coupling (32A, 32B) provided with at least two parallel rows of claws (320A, 320B), the claws (320A) of a first band (30A) being configured to engage the claws (320B) of the second band (30A) strip (30B) and thus couple the two said strips, characterized by the fact that: - at least one row of claws (320A) of the first band (30A) and at least one row of claws (320B) of the second band (30B) are deformed locally so as to form several obstacles (4A, 4B), which obstacles are arranged so that the obstacles (4A) of the claw row (320A) of the first band (30A) abut against the obstacles (4B) of the claw row (320B) of the second band (30B), to oppose the glissem relative lateral ent of said bands. 3. Device according to claim 2, wherein the two rows of claws (320A) of the first band (30A) comprise several obstacles (4A). 4. Device according to claim 3, wherein the two rows of claws (320B) of the second band (30B) comprise several obstacles (4B). 5. Device according to one of claims 2 to 4, wherein the obstacles (4A, 4B) are in the form of beads located in planes perpendicular to the direction of relative lateral sliding strips (30A, 30B). 6. Device according to claim 5, wherein the beads are spaced apart from 3 mm to 7 mm. 7. Device according to one of the preceding claims, wherein the rows of claws (320A) of the first band (30A) have a different color rows of claws (320B) of the second band (30B). 8. Advertising furniture comprising a support (1) inside which advertising posters (2) coupled to each other are rotated in front of at least one viewing opening (10), characterized in that said posters are coupled between them by means of the device (3) according to one of claims 2 to 7. 9. A method of manufacturing a plastic strip (30A, 30B) according to claim 1, characterized in that said strip is obtained by extrusion and then at least one row of claws (320A, 320B) is deformed locally. , so as to form said obstacles (4A, 4B). The method of claim 9, wherein the claw row (320A, 320B) is deformed by crushing or thermoforming.