Trackway mat having a pocket comprising at least one degassing hole

Abstract

The invention relates to a trackway mat (10) that can be folded or rolled up and has a longitudinal direction (L) and a transverse direction (T), the trackway mat comprising a first pocket portion (18) and a second pocket portion (20) joined to one another in a stacked manner by a joining step, so as to define a first pocket (161) located between the first and second pocket portions and extending in the transverse direction of the trackway mat, the trackway mat further comprising at least one stiffening element (26) disposed in the first pocket, the first pocket comprising at least one degassing hole (22) for discharging the gases produced during the joining step.

Description

Treadmill having a pocket with at least one degassing hole

[0001] The present invention relates to a foldable or rollable conveyor belt intended for temporary placement on the ground to facilitate vehicle movement. Such a conveyor belt can be placed on soft ground, such as sand, on muddy terrain, or even on uneven ground, to create a driving surface and access path for vehicles.

[0002] Document FR 2 976 598, filed by the applicant, describes a mat formed of two layers bonded together in a superimposed manner via a bonding step. This mat includes a plurality of pockets formed between the two layers, each extending along a transverse direction of the mat. These pockets are configured to receive a stiffening element to give the mat greater strength, particularly for supporting heavy vehicles.

[0003] One drawback of this prior art conveyor belt is that the bonding process between its two layers generates significant gas release. The layers are made of polymer-coated textiles. The gas generated generally originates from the resins used to bond or coat the polymers onto the textiles. The nature of the gas depends on the types of resins or solvents chosen to ensure polymer adhesion to the textile. The generated gases then tend to accumulate within the pockets formed between the two layers. This results in swelling of the pockets, which can deform the conveyor surface and lead to tearing or separation of the different layers, for example, the first and second layers, at the pockets. The conveyor belt is therefore at risk of damage due to these accumulated gases.

[0004] One aim of the present invention is to provide a conveyor belt that remedies the aforementioned drawbacks.

[0005] To this end, the invention relates to a rolling or foldable conveyor belt having a longitudinal direction and a transverse direction, the conveyor belt comprising at least a first pocket portion and a second pocket portion joined together in a superimposed manner by a joining step, so as to define a first pocket for the conveyor belt located between said first and second pocket portions and extending along the transverse direction of the conveyor belt, the conveyor belt further comprising at least one stiffening element disposed in the first pocket, the first pocket comprising at least one degassing hole to evacuate the gases produced during the joining step.

[0006] The treadmill mat is particularly suitable for use on soft ground, such as sand, mud, or uneven surfaces. It provides additional traction, making it easier for the vehicle to move across these surfaces. It also helps prevent the vehicle from getting stuck in the mud.

[0007] Because it can be folded or rolled up, the treadmill's footprint can be reduced when not in use.

[0008] Without limitation, the conveyor belt may include a first layer, preferably forming the top layer of the belt, comprising the first pocket portion. Without limitation, the conveyor belt may also include a second layer, preferably forming the bottom layer of the belt, comprising the second pocket portion. Preferably, said first and second layers are bonded together.

[0009] Preferably, but not limited to, the first pocket portion forms an upper pocket portion for the treadmill. It advantageously forms a sleeve element. It advantageously has an upper surface on which the wheel of the vehicle moving on the treadmill rolls. Preferably, but not limited to, the second pocket portion forms a lower pocket portion for the wheel tread. It advantageously forms a sleeve element. This second pocket portion is advantageously designed to come into contact with the ground on which the treadmill is placed.

[0010] Preferably, the said first and second portions of the pocket each have a semicylindrical shape.

[0011] The conveyor belt may, but is not limited to, include one or more pockets. The conveyor belt advantageously comprises a plurality of pockets, spaced apart from one another. The first pocket advantageously has a tubular shape. It advantageously forms a sheath configured to receive the stiffening element. The first pocket advantageously has a diameter between 10 and 40 millimeters.

[0012] The stiffening element reinforces the treadmill belt, making it more rigid and thus further increasing its traction and load-bearing capacity. The stiffening element may extend entirely or partially within the first pocket, but is not limited to this. Preferably, but also not limited to this, the stiffening element may extend partially outside the first pocket.

[0013] Without limitation, the stiffening element can be formed from a metallic material or from a composite material.

[0014] Preferably, the first and second pocket sections enclose the stiffening element at the level of the first pocket. This improves the retention of the stiffening element. The stiffening element is advantageously enclosed within the first pocket.

[0015] Preferably, the first and second pouch portions each include a part that is not attached to the other pouch portion, in order to define said first pouch. The first and second pouch portions are advantageously attached to each other on either side of the first pouch.

[0016] The joining of the first and second sections of the ladle generates gas release, particularly within the first ladle. This gas release can result from a joining process involving vulcanization or high-frequency welding.

[0017] Said at least one degassing hole is formed in said first pocket.

[0018] A vent hole is defined as a through-hole or perforation made in the first pocket, for example, in the first or second portion of the pocket. A vent hole is advantageously defined as a perforation formed in the first pocket.

[0019] Said at least one vent hole advantageously passes through the first portion of the pocket or the second portion of the pocket. Said at least one vent hole advantageously forms a perforation in the portion of the pocket in which it is formed.

[0020] The at least one degassing hole advantageously has a substantially circular shape. Preferably, the at least one degassing hole extends transversely to the first pocket portion and / or transversely to the second pocket portion. The at least one degassing hole advantageously extends transversely to the longitudinal and transverse directions of the conveyor belt. Preferably, the conveyor belt extends in a plane of the belt, with the at least one degassing hole extending transversely to said plane of the belt. Without limitation, the at least one degassing hole may be formed in the first pocket portion or in the second pocket portion. It advantageously opens into the first pocket. The at least one degassing hole advantageously traverses the pocket portion in which it is formed. Preferably, the first pocket comprises a plurality of degassing holes.

[0021] According to the invention, at least one degassing hole in the first pocket allows the gases produced during the manufacturing of the conveyor belt, and more specifically during the step of joining the first and second pocket sections, to escape. These gases escape from the first pocket through this at least one degassing hole. As a result, the risk of deformation, tearing, or separation of the first and second pocket sections due to gas accumulation inside the first pocket is reduced.

[0022] Preferably, the conveyor belt comprises at least one layer or sheet to which the first pocket portion of the first pocket is attached. This layer or sheet advantageously includes the second pocket portion.

[0023] Preferably, the treadmill includes at least one layer comprising said second pocket portion.

[0024] According to a non-limiting variant, the conveyor belt comprises a first layer and a second layer joined together by a joining step, the first layer comprising the first pocket portion while the second layer comprises the second pocket portion. Advantageously, the first and second layers are not joined together at least at the first pocket. It is understood that the first and second pocket portions are then advantageously constituted by portions of the first and second layers, respectively.

[0025] Preferably, but not limited to, the first layer forms a top layer for the tread. It advantageously has a running surface on which the wheel of the vehicle moving on the tread rolls. Preferably, but not limited to, the second layer forms a bottom layer for the tread, intended to come into contact with the ground.

[0026] Said first layer advantageously includes all the first portions of the pockets of the rolling mat pockets.

[0027] Preferably, at least one vent hole is provided in the first or second layer. Advantageously, this vent hole passes through either the first or second layer. Advantageously, this vent hole consists of a perforation in the layer in which it is provided.

[0028] Advantageously, the said first and second layers each have the form of a sheet or a fold.

[0029] Preferably, said at least one degassing hole passes through said aquifer or fold of the layer in which it is provided.

[0030] Advantageously, the first and second pouch sections each comprise at least one polymer material. This polymer material allows, in particular, the joining of the first and second pouch sections by vulcanization or high-frequency welding. Such a material also exhibits good elongation at break.

[0031] Preferably, the polymer material comprises one or more elastomer(s).

[0032] Preferably, the treadmill includes at least one layer comprising at least one polymer material

[0033] Advantageously, at least one of the first and second pocket portions comprises a textile element coated with said polymer material. Such a polymer coating gives the treadmill good resistance while offering a satisfactory coefficient of adhesion, particularly at the pockets.

[0034] Advantageously, the textile element is woven. The textile element advantageously has at least one surface coated with the polymer material. Even more preferably, the textile element has an upper surface coated with the polymer material and a lower surface coated with the polymer material.

[0035] Preferably, the first pocket portion and the second pocket portion each comprise a polymer-coated textile element.

[0036] Advantageously, the treading mat includes at least one layer comprising a textile element coated with said polymer material.

[0037] Advantageously, the first and second pouch sections are joined together by welding or vulcanization. One benefit is achieving an effective and durable bond between the first and second pouch sections. These bonding techniques involve fusing the polymer material of the first pouch section with the polymer material of the second pouch section. It is understood that each of these bonding techniques generates a release of gas.

[0038] Advantageously, the conveyor belt comprises first and second layers joined together by welding or vulcanization.

[0039] Preferably, the first pocket comprises a first end and a second end opposite the first end, considered along the transverse direction of the conveyor belt, with at least one of the first and second ends being closed. One advantage is to reduce the risk of the stiffening element coming out of the first pocket and being lost or soiled by falling to the ground. Another advantage is to improve the pocket's watertightness by preventing water or mud from entering it through either end.

[0040] The said end of the pouch is advantageously closed by joining the first and second portions of the pouch at this point.

[0041] Preferably, the first and second ends of the first pocket are closed. This further reduces the risk of the stiffening element escaping from the first pocket and further improves the pocket's watertightness.

[0042] Advantageously, said at least one degassing hole is formed in the first pocket portion or in the second pocket portion of the first pocket.

[0043] Advantageously, the first and second portions of the pocket are in the form of a fold or a sheet, with at least one vent hole being provided in said fold or sheet. This vent hole advantageously passes through said fold or sheet.

[0044] Preferably, said at least one degassing hole is formed in a summit portion of said first pocket portion or said second pocket portion. Preferably, said at least one degassing hole is formed in a central portion of said first pocket portion or said second pocket portion, considered along said longitudinal direction.

[0045] Preferably, the first pouch has a plurality of degassing holes formed in said first portion of the pouch and / or in said second portion of the pouch. One advantage is to allow for faster and more efficient degassing.

[0046] Without limitation, the first pocket may include one or more vent hole(s) formed in the first portion of the pocket and / or one or more vent hole(s) formed in the second portion of the pocket.

[0047] Preferably, but not exclusively, the degassing holes of the first pocket are formed only in the first portion of the pocket or only in said second portion of the pocket.

[0048] Preferably, the degassing holes are distributed according to the width of the conveyor belt. Advantageously, the distance from the first end of the first pocket is different for all the degassing holes of said first pocket.

[0049] Advantageously, the vent holes are positioned close to the stiffening element, preferably at the location of said stiffening element. In other words, the vent holes of the first pocket are advantageously formed opposite the stiffening element, or even perpendicular to said stiffening element.

[0050] Preferably, the degassing holes are positioned in a middle part of the first portion of the pocket and / or the second portion of the pocket, considered in the longitudinal direction of the conveyor.

[0051] Preferably, said first pocket comprises a plurality of degassing holes formed in said first portion of pocket and substantially aligned along said transverse direction of the conveyor belt.

[0052] Preferably, said degassing holes pass through the first portion of the ladle. Advantageously, said degassing holes form perforations in said first portion of the ladle.

[0053] Preferably, the vent holes are arranged in a median plane of the first and second ladle portions, parallel to the transverse direction and perpendicular to the conveyor belt. Preferably, the vent holes are distributed along the length of the first ladle portion, considered in the transverse direction of the conveyor belt.

[0054] Preferably, said first pocket comprises a plurality of degassing holes formed in said second portion of pocket and substantially aligned along said transverse direction of the conveyor belt.

[0055] Advantageously, the stiffening element passes through at least two adjacent vent holes formed in the first portion of the pocket, so that a portion of the stiffening element, located between these two vent holes, extends outside the first pocket. The vent holes thus fulfill a dual function: allowing the evacuation of gases while also allowing the stiffening element to extend partially outside the first pocket. A portion of the stiffening element is therefore visible. One advantage is the ability to visually inspect its condition and potentially access it, for example, to extract it from the first pocket by pulling on the portion of the stiffening element extending outside the first pocket. This allows, in particular, the replacement of a damaged stiffening element.Furthermore, in this configuration, the first and second sections of the ladle exert a support on the stiffening element at the level of the aforementioned degassing holes through which it passes. Also, the gap between the first and second sections of the ladle and the stiffening element is reduced, which improves the latter's stability.

[0056] It is also understood that part of the first pocket section is then pinched between the second pocket section and the part of the stiffening element extending beyond the first pocket. This allows the first pocket section to be stretched and provides it with better support.

[0057] Preferably, the distance between said two adjacent vent holes through which the stiffening element passes is less than a distance separating one of these two vent holes and another vent hole which is adjacent to it.

[0058] Preferably, the distance between said two degassing holes through which the stiffening element passes is between 5 and 15 millimeters, preferably about 8 millimeters.

[0059] Preferably, at least one vent hole has a diameter equal to or slightly larger than the diameter of the stiffening element. Another advantage is reducing the gap between the stiffening element and the first section of the pocket. This also ensures the pocket is watertight, preventing water or mud from entering through the vent hole. However, the venting of gases through the vent hole is not compromised.

[0060] Advantageously, said at least one degassing hole has a diameter of less than 20 mm.

[0061] Preferably, the conveyor belt further comprises a first portion of a second pocket and a second portion of a second pocket defining a second pocket located between said first and second portions of a second pocket, said second pocket extending parallel to said first pocket, in the transverse direction of the conveyor belt.

[0062] This second pocket is advantageously configured to accommodate a stiffening element, placed within it. One benefit is to further reinforce the tread and improve its load-bearing capacity and traction.

[0063] Preferably, said second pocket includes at least one degassing hole.

[0064] Preferably, the pockets are distributed along the longitudinal direction of the mat. Preferably, the distance between two consecutive pockets is the same for all pockets.

[0065] Preferably, the treadmill includes at least three pockets.

[0066] Preferably, the conveyor belt comprises at least one layer including the second pocket portion of the first pocket and the second portion of the second pocket. Preferably, the second pocket portion of the first pocket and the second portion of the second pocket form a single piece. Preferably, the first portion of the first pocket and the first portion of the second pocket are attached to said layer including the second pocket portion of the first pocket and the second portion of the second pocket.

[0067] According to an advantageous embodiment, the first pocket portion of the first pocket has a first free lateral edge facing the second pocket, and the first portion of the second pocket has a second free lateral edge facing the first pocket, said second free lateral edge being distant from and distinct from the first free lateral edge. According to this embodiment, the first pocket portion of the first pocket and the first portion of the second pocket are distinct elements, formed in separate layers. They do not form a single piece. The first pocket portion of the first pocket and the first portion of the second pocket are advantageously each formed by a distinct strip.

[0068] According to another advantageous variant, the first portion of the second pocket of the second pocket and the first portion of the pocket of the first pocket form a single piece.

[0069] According to this variant, it is understood that the first portion of the second pocket and the first portion of the pocket of the first pocket belong to the same layer of the conveyor belt, rather than the first layer of the conveyor belt.

[0070] Advantageously, the second portion of the second pocket of the second pocket and the second portion of the pocket of the first pocket form one and the same piece.

[0071] Advantageously, said first pocket extends over substantially the entire width of the conveyor belt, considered in said transverse direction. Alternatively, said first pocket could extend over only a portion of the width of the conveyor belt.

[0072] Advantageously, said stiffening element has the shape of a rod.

[0073] Preferably, considered in the transverse direction, the stiffening element has a length less than or equal to the width of the conveyor belt. One advantage is to prevent the stiffening element from protruding laterally beyond the belt, in order to avoid injuring users.

[0074] Preferably, at least one degassing hole passes through the portion of the pocket in which it is formed. It is understood that it passes through either the first portion of the pocket or the second portion of the pocket.

[0075] The invention also relates to a method for manufacturing a conveyor belt as described above, the method comprising the steps according to which: - a first pocket portion and a second pocket portion are provided; - the stiffening element is placed on the second pocket portion; - the first pocket portion is placed on the second pocket portion, the stiffening element being located between the first and second pocket portions; - at least one degassing hole is made in one of the first and second pocket portions; - the first and second pocket portions are joined together so that the stiffening element is located in a first pocket defined between the first and second pocket portions, the gas produced during joining being able to be evacuated via the degassing hole.

[0076] Without limitation, the degassing hole may be made before or after placing the stiffening element on the second portion of the pocket, before or after placing the first portion of the pocket on the second portion of the pocket, before or after joining the first and second portions of the pocket together.

[0077] Preferably, when the mat includes a layer comprising said second pocket portion, said first pocket portion is attached to said second layer.

[0078] Preferably, said at least one degassing hole passes through the portion of the pocket in which it is formed.

[0079] Advantageously, said at least one degassing hole is made in one of the first and second portions of the pocket near the stiffening element, preferably at the location of the stiffening element.

[0080] Preferably, the first and second portions of the pocket are joined together by vulcanization or welding.

[0081] Advantageously, said first pocket comprises a first end and a second end opposite said first end, and said first and second portions of pocket are joined together so as to close at least one of the first and second ends of the first pocket. Description of the drawings

[0082] The invention will be better understood upon reading the following description of embodiments of the invention given by way of non-limiting examples, with reference to the accompanying drawings, in which:

[0083] Laillustre a first embodiment of a conveyor belt according to the invention;

[0084] This is a longitudinal cross-sectional view of the first pocket of the conveyor belt;

[0085] This is a top view of the conveyor belt;

[0086] Laillustre a second embodiment of a conveyor belt according to the invention;

[0087] This is a cross-sectional view of the first pocket of the conveyor belt, zoomed in on a visible part of the stiffening element;

[0088] Laillustre a third embodiment of a conveyor belt according to the invention;

[0089] This illustrates a fourth embodiment of a conveyor belt according to the invention; and

[0090] This is a longitudinal cross-sectional view of part of the conveyor belt. Detailed description

[0091] The invention relates to a foldable or rollable treadmill that facilitates the movement of vehicles, particularly on soft ground, and includes a first pocket comprising at least one degassing hole.

[0092] To make the explanation more concrete, several embodiments of a conveyor belt according to the invention are described in detail below, with reference to the accompanying drawings. It should be noted that the invention is not limited to these examples.

[0093] Lamontre presents a first embodiment of a treadmill10 according to the invention. This treadmill is foldable and rollable upon itself.

[0094] The conveyor belt 10 has a longitudinal direction L and a transverse direction T. Its length, considered along said longitudinal direction L, is greater than its width, considered along said transverse direction T. For clarity, the entire conveyor belt is not shown here. The conveyor belt 10 has a first lateral edge 10a and a second lateral edge 10b opposite the first lateral edge.

[0095] As illustrated in Figure 10, and in the longitudinal cross-sectional view of Figure 14, the conveyor belt 10 comprises, in this non-limiting example, a first layer 12, forming here an upper layer. The conveyor belt further comprises a second layer 14, forming here a lower layer for the belt. The first and second layers 12, 14 each comprise a textile element coated with a polymer material, covering both faces of said textile element. The first and second layers 12, 14 are superimposed and bonded together, here by a vulcanization technique. The vulcanization step results in the fusion of the polymer material of the first layer 12 and the polymer material of the second layer 14, leading to the bonding of the first and second layers. Without departing from the scope of the invention, the bonding of the first and second layers 12, 14 can be achieved by welding, in particular by high-frequency welding.

[0096] The first layer 12 has an upper surface 12a defining a running surface. The second layer 14 has a lower surface 14a configured to come into contact with the ground on which the running belt is positioned.

[0097] Referring again to the diagram, we observe that the conveyor belt 10 comprises a plurality of pockets 161, 162, 163 extending along the transverse direction T. In this non-limiting example, only three pockets are shown: a first pocket 161, a second pocket 162, and a third pocket 163. The belt may, however, include more pockets. These pockets 16 extend parallel to each other and, in this non-limiting example, across the entire width of the conveyor belt. These pockets 161, 162, 163 are located between the first and second layers 12, 14. The pockets 161, 162, 163 are spaced apart and separated at regular intervals along the longitudinal direction L of the conveyor belt. The first, second, and third pockets 161, 162, 163 are spaced approximately 20 centimeters apart.

[0098] Figure 161 shows a longitudinal cross-sectional view illustrating the first pocket. The second and third pockets are substantially identical to this first pocket, so they will not be described in detail here.

[0099] The first layer 12 comprises a first portion of a pocket 18 defining an upper portion of the first pocket 161. This first portion of a pocket 18 forms a sheath element. The second layer 14 comprises a second portion of a pocket 20 defining a lower portion of the first pocket 161. This second portion of a pocket 20 also forms a sheath element. These first and second portions of the pocket 18, 20 are joined together on either side of the first pocket by vulcanization. However, they each have a portion that is not joined together to form the first pocket.

[0100] In this non-limiting example, the first pocket portion 18 forms a portion of the first layer 12. The second pocket portion 20 forms a portion of the second layer 14. The first and second pocket portions 18, 20 each comprise a textile element coated with a polymer material, covering both faces of said textile element. Referring again to the previous example, we find that the first pocket 161 presents a first end 16a and a second end 16b, opposite the first end. The first end 16a of the first pocket is located at the first lateral edge 10a of the conveyor belt, while the second end 16b of the first pocket is located at the second lateral edge 10b of the conveyor belt. In the embodiment of the, the first and second ends of the pockets 16 1,162,163sont ouvertes ou, autrement dit, ne sont pas fermées.

[0101] Each pocket contains a stiffening element 26, shaped like a rod and made of a composite material. In the example shown, the stiffening elements 26 extend over substantially the entire width of the mat, along the longitudinal direction T, and over the entire length of the pockets.

[0102] According to the invention, the first pocket161 includes at least one degassing hole22. More precisely, as can be seen in Figures 1 to 3, the first pocket16 1comprend une pluralité de trous de dégazage22. Ces trous de dégazage22permettent d’évacuer les gaz produits lors de l’étape de solidarisation des première et deuxième portions de poche18,20entres-elles, au moment de l’assemblage du tapis de roulage.

[0103] These degassing holes 22 are formed in the first layer 12 and more precisely in the first portion of the pocket 18, so that they are visible in the upper part of the conveyor belt. These degassing holes pass through the first layer 12 and the first portion of the pocket 18. They form perforations made in said first portion of the pocket.

[0104] Without departing from the scope of the invention, one or more vent holes could be formed in the second portion of the pocket 20. The vent holes 22 pass through the first layer 12 and open into the first pocket 161. As illustrated in Figure 3, these vent holes 22 are substantially aligned along the transverse direction T of the conveyor belt and are positioned at the location, level, or opposite the stiffening element 26. They are distributed along the length of the first pocket. The vent holes 22 are grouped in pairs close to each other. Within a pair, the vent holes are spaced approximately 10 millimeters apart. The diameter of the vent holes 22 is approximately 22 millimeters. In the non-limiting example in Figure 3, the stiffening element 26 does not pass through said vent holes 22.

[0105] The conveyor belt 10 has a centerline extending M, extending along the longitudinal direction Let illustrated in the top view of the. In this non-limiting example, the first pocket 161 comprises eight vent holes 22, arranged in four pairs of vent holes. The first pocket 161 includes a first pair22 1de trous de dégazage22positionnée à proximité du premier bord latéral10adu tapis de roulage10. Elle comprend également une deuxième paire222de trous de dégazage22positionnée à proximité de la ligne médianeM, d’un premier côté de cette ligne médiane. La première poche comprend de plus une troisième paire223de trous de dégazage22positionnée à proximité de cette ligne médianeMet d’un autre côté de cette dernière. La première poche161comprend enfin une quatrième paire224de trous de dégazage22située à proximité du deuxième bord latéral10bdu tapis de roulage. La première paire221de trous de dégazage22est située à environ 20 centimètres du premier bord latéral10adu tapis de roulage. La quatrième paire224de trous de dégazage22est située environ à 20 centimètres du deuxième bord latéral10bdu tapis de roulage.

[0106] Similar to the first pocket 161, the other pockets 162, 163 of the conveyor belt 10 also include a plurality of vent holes 22. These pockets also each comprise a first pocket portion and a second pocket portion. In particular, the second pocket 162 comprises a first portion of a second pocket 182 and a second portion of a second pocket 202.

[0107] In this non-limiting example, the first layer 12 comprises the first portion 18 of the first pocket 161 and the first portion of the second pocket 182 of the second pocket 162. Therefore, the first portion 18 of the first pocket 161 and the first portion of the second pocket 182 form a single piece. Similarly, in this non-limiting example, the second layer 14 comprises the second portion 20 of the first pocket 161 and the second portion of the second pocket 202 of the second pocket 162. Therefore, the second portion 20 of the first pocket 161 and the first portion of the second pocket 202 form a single piece.

[0108] Figure 1 illustrates a second embodiment of the conveyor belt according to the invention. The first, second, and third pockets 161, 162, 163 are similar to the pockets of the first embodiment shown in Figures 1 to 3. In particular, the first, second, and third pockets 161, 162, 163 each also comprise a plurality of degassing holes 22, which are arranged in the same manner as in the first embodiment.

[0109] In this second embodiment, the stiffening element 26, located in the first pocket 161, passes through all the vent holes 22 of this first pocket. Furthermore, the stiffening element 26 has several visible parts, each extending out of the first pocket 161 and situated between two adjacent vent holes 22 forming one of said pairs of vent holes. More precisely, the stiffening element 26 comprises: - a first visible part 261 located between the two vent holes 22 of the first pair 221 of vent holes; - a second visible part 262 located between the two vent holes 22 of the second pair 222 of vent holes; - a third visible part 263 located between the two vent holes 22 of the third pair 223 of vent holes; and- a fourth visible part264located between the two degassing holes of the fourth pair224of degassing holes.

[0110] Lamontre shows a cross-sectional view of the first pocket161, zoomed in on the first visible part261 of the stiffening element26. On this, we can see the stiffening element26 extending partly inside the first pocket161 between the first et deuxième couches12,14et entre les première et deuxième portions de poche18,20. On voit également la partie visible261de l’élément de rigidification s’étendant hors de la première poche161, entre les deux trous de dégazage22de la première paire de trous de dégazage221. On constate qu’une partie18ade la première portion de poche18est pincée entre la partie visibles261de l’élément de rigidification26et la deuxième portion de poche20. Un intérêt est d’améliorer le maintien de l’élément de rigidification et d’exercer une tension sur la première portion de poche18, et plus généralement sur la première poche161, afin d’en améliorer le maintien.

[0111] Figure 16 illustrates a third embodiment of the conveyor belt according to the invention. In this third embodiment, the first, second, and third pockets 161, 162, 163 are shorter than the width of the conveyor belt. They therefore extend over less than the width of said conveyor belt. The pockets 16 also have first and second ends 16a, 16b which are closed. The stiffening elements 26 are also shorter than the width of the conveyor belt, so they do not extend over the entire width of the conveyor belt. The stiffening elements 26 are partially embedded within the pockets.

[0112] Figure 1 illustrates a fourth embodiment of the conveyor belt 10 according to the invention. In this fourth embodiment, the conveyor belt also comprises a plurality of pockets 161, 162, 163. As in the previous examples, the second layer 14 comprises the second portions of the pockets 161, 162, 163, and in particular the second portion 20 of the first pocket 161 and the second portion 20 of the second pocket 202. The second portions of the pockets thus form a single piece.

[0113] In this non-limiting example, the carpet lacks a first layer. The first portions of the pockets in the set of pockets are distinct. In particular, the first portion of the first pocket and the first portion of the second pocket form two separate pieces.

[0114] As can be seen in the cross-sectional view, the first portion of pocket 18 of the first pocket 161 has a first free lateral edge 19 located opposite the second pocket 162. Furthermore, the first portion of the second pocket 182 has a second free lateral edge 192 located opposite the first pocket, distinct from the first free lateral edge 19. This second free lateral edge 192 is located at a distance d1 from the first free lateral edge 19 of the first portion of pocket.

Claims

Rolling conveyor (10) foldable or rollable on itself and having a longitudinal direction (L) and a transverse direction (T), the rolling conveyor comprising at least a first pocket portion (18) and a second pocket portion (20) joined together in a superimposed manner by a joining step, so as to define a first pocket (161) for the rolling conveyor situated between said first and second pocket portions and extending along the transverse direction of the rolling conveyor, the rolling conveyor further comprising at least one stiffening element (26) disposed in the first pocket, the first pocket comprising at least one degassing hole (22) to evacuate the gases produced during the joining step, said at least one degassing hole (22) being formed in the first pocket portion (18) or in the second pocket portion (20) of the first pocket (161). Conveyor belt (10) according to claim 1, wherein said first and second pocket portions (18,20) each comprise at least one polymer material. Rolling mat (10) according to claim 2, wherein at least one of said first and second pocket portions (18,20) comprises a textile element coated with said polymer material. Conveyor belt (10) according to claim 2 or 3, in which said first and second pocket portions (18,20) are joined together by welding or vulcanization. A conveyor belt (10) according to any one of claims 1 to 4, wherein said first pocket (161) comprises a first end (16a) and a second end (16b) opposite said first end, considered along said transverse direction (T) of the conveyor belt, and wherein at least one of said first and second ends is closed. Conveyor belt (10) according to claim 5, in which said first and second ends (16a,16b) of the first pocket (161) are closed. Conveyor belt (10) according to any one of claims 1 to 6, wherein said first pocket (161) comprises a plurality of degassing holes (22) formed in said first portion of pocket (18) and / or in said second portion of pocket (20). A conveyor belt (10) according to claim 7, in which said degassing holes (22) are positioned near the stiffening element (26), preferably at the location of said stiffening element. Rolling conveyor (10) according to claim 7 or 8, wherein said first pocket (161) has a plurality of degassing holes (22) formed in said first portion of pocket (18) and which are substantially aligned along said transverse direction (T) of the rolling conveyor. A conveyor belt (10) according to claims 8 and 9, wherein the stiffening element (26) passes through at least two adjacent vent holes (22) formed in the first pocket portion (18), so that a portion of said stiffening element, located between these two vent holes, extends out of the first pocket (161). Running belt (10) according to any one of claims 1 to 10, wherein said at least one degassing hole (22) has a diameter of less than 20 mm. A conveyor belt (10) according to any one of claims 1 to 11, further comprising a first portion of a second pocket (182) and a second portion of a second pocket (202) defining a second pocket (162) situated between said first and second portions of a second pocket, said second pocket extending parallel to said first pocket (161), along the transverse direction (T) of the conveyor belt. A conveyor belt (10) according to claim 12, wherein the first portion of the pocket (18) of the first pocket (161) has a first free lateral edge (19) disposed opposite the second pocket (162), and wherein the first portion of the second pocket (182) has a second free lateral edge (192) disposed opposite the first pocket, said second free lateral edge being distant and distinct from the first free lateral edge. Conveyor belt (10) according to claim 12, wherein the first portion of the second pocket (182) of the second pocket (162) and the first portion of the pocket (18) of the first pocket (161) form one and the same piece. Rolling mat (10) according to any one of claims 12 to 14, wherein the second portion of the second pocket (202) of the second pocket (162) and the second portion of the pocket (20) of the first pocket (161) form a single piece. Rolling belt (10) according to any one of claims 1 to 15, wherein said first pocket (161) extends over substantially the entire width of the rolling belt, considered along said transverse direction (T). Treadmill (10) according to any one of claims 1 to 16, wherein said stiffening element (26) has the form of a rod. Running belt (10) according to any one of claims 1 to 17, in which, considered along said transverse direction (T), said stiffening element (26) has a length less than or equal to a width of the running belt. Conveyor belt (10) according to any one of claims 1 to 18, wherein said at least one degassing hole (22) passes through the pocket portion (18,20) in which it is formed. A method for manufacturing a conveyor belt (10) according to any one of claims 1 to 19, comprising the steps in which: - a first pocket portion (18) and a second pocket portion (20) are provided; - the stiffening element (26) is placed on the second pocket portion; - the first pocket portion is placed on the second pocket portion, the stiffening element being located between the first and second pocket portions; - at least one degassing hole (22) is made in one of the first and second pocket portions; - the first and second pocket portions are joined together so that the stiffening element is located in a first pocket (161) defined between the first and second pocket portions, the gas produced during joining being able to be evacuated via the degassing hole. Method according to claim 20, wherein said at least one degassing hole (22) is made in one of the first and second pocket portions (18,20) near the stiffening element (26), preferably at the location of the stiffening element. Manufacturing method according to claim 20 or 21, wherein said first and second pocket portions (18,20) are joined together by vulcanization or welding. A manufacturing method according to any one of claims 20 to 22, wherein said first pocket (16) comprises a first end (16a) and a second end (16b) opposite said first end, and wherein said first and second pocket portions (18,20) are joined together so as to close at least one of the first and second ends of the first pocket.

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