Device for cable guide pulleys

Abstract

The present invention relates to a device intended to form a liner for a cable guide pulley, the device having an outer surface oriented radially outward from the device, the outer surface having a groove of depth D and width W intended to contact a cable of diameter DC, the groove generating a rim angle A, and the outer profile of the groove including a gradual change in radius of curvature.

Description

Technical Field

[0001] The present invention relates to a device for a cable guide pulley. The present invention particularly relates to a device intended to form a lining of a cable guide pulley.

Background Art

[0002] The devices, cable guide pulleys, and objects referred to in the present invention are usually described by means of a representation in the meridian plane, i.e., a plane enclosing the axis of rotation (axis of rotation) of the cable guide pulley. All of these products (devices and cable guide pulleys) are objects having a shape of a turn relative to their axis of rotation.

[0003] A cable conveying system usually includes a traction cable extending along a given path, at least one conveying unit movable along the path and connectable to the traction cable by a coupling device, a support structure positioned along the path for supporting and guiding the conveying unit, and at least one cable guide pulley mounted on the support structure. The cable conveying system of the above type includes both a rail system and a suspension system.

[0004] The cable guide pulley is provided with a device (lining), also called an "envelope" or "bandage", which will come into direct contact with the traction cable. The device (lining) is mainly made of one or more elastomeric compositions for better adhesion to the traction cable and for absorbing vibrations transmitted through the traction cable while withstanding the mechanical attack on the traction cable generated through the traction cable and / or the support structure, and a reinforcing section incorporated into the elastomeric composition for better fastening onto a rigid member such as a wheel, hub, or pulley on which the device (lining) is assembled to guarantee the load capacity of the device (lining).

[0005] The load capacity and durability of the device (lining) are a result of the properties of the elastomer composition, which is the only material that deforms periodically with each rotation, contributing to its load-bearing capacity. Increasing the load capacity generates additional stress on the contact between the elastomer composition and the cable. The groove shape of the device (lining) is a parameter that affects the wear (service life) of the elastomer composition and the stress levels the elastomer composition experiences under shear and contact pressure.

[0006] It is well known that equalizing the contact pressure level beneath the cable is effective in improving the service life and durability of the device (lining) by avoiding the occurrence of areas of excessive stress that lead to greater fatigue. The service life of the device (lining) is related to the early onset of cracks in areas subjected to maximum pressure, while areas with less load can last longer. Various solutions have been proposed to improve these functions.

[0007] DE3024177 discloses a cable pulley having a groove comprising a rounded bottom surface and two straight sides that conform to the diameter of the cable, wherein the coefficient of friction of the sides is smaller than that of the bottom surface, and the pulley can be constructed from sections, one section incorporating the rounded bottom surface being fixed between two outer members having inner surfaces that form the straight sides, and three sections can be connected, with the central section having feet that project outward to fit into recesses in the base of each side section.

[0008] DE1575583 discloses an interchangeable rope running ring for a rope pulley cooperating with a wire rope, comprising one or two different materials, wherein the wear material of this ring in the area of ​​the rope groove is made of a material known on its own, such as rubber or elastic rope swath, and the wear material is divided in particular in the area of ​​the rope groove for better heat dissipation and to achieve a sufficiently firm fit.

[0009] DE102011055939 discloses a pulley having a support surface for guiding a wire rope as it travels on the pulley, and including a structured mold for increasing the contact surface between the pulley and the wire rope, wherein the mold is adapted to the shape of the outer surface of the wire rope, the mold includes projections and / or recesses formed in the direction of the rotational direction of the pulley and / or its axis of rotation, the support surface is formed by edge sections, and the mold includes structured sections having a length proportional to the length of the wire rope. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] DE3024177 [Patent Document 2] DE1575583 [Patent Document 3] DE102011055939 [Overview of the Initiative] [Problems that the invention aims to solve]

[0011] However, the solutions disclosed in these documents make it difficult to equalize the contact pressure level under the cable, which leads to a reduction in the lifespan and durability of the device (lining).

[0012] Therefore, there is a need for a device intended to form a cable guide pulley device (lining) that can equalize the contact pressure level under the cable, which provides increased service life and durability of the device (lining). [Means for solving the problem]

[0013] The "radial direction / orientation" is the direction / orientation perpendicular to the rotation axis of the cable guide pulley. This direction / orientation corresponds to the thickness orientation of the device (lining).

[0014] The "axial direction / orientation" is the direction / orientation parallel to the rotation axis of the cable guide pulley. A direction / orientation of ±10° parallel to the rotation axis of the cable guide pulley is considered "substantially parallel" to the axial direction / orientation.

[0015] The "circumferential direction / orientation" is the direction / orientation that is tangential with respect to any circle centered on the axis of rotation. This direction / orientation is perpendicular to both the axial direction / orientation and the radial direction / orientation. Directions / orientations within ±10° that are perpendicular to both the axial direction / orientation and the radial direction / orientation are considered "substantially parallel" to the circumferential direction / orientation.

[0016] In other words, the object of the present invention is to provide a device intended to form a cable guide pulley device (lining), such a device (lining) can provide improvements to service life and durability through a suitable groove shape (outer profile).

[0017] The present invention provides a device intended to form a lining for a cable guide pulley, the device having an outer surface facing radially outward, the outer surface is - A groove having a depth D, wherein the depth D is the radial distance between the radially outermost point of the groove and the radially innermost point of the groove having a width W, the width W is the axial distance between the two axial ends, and the groove has an outer profile. Includes, - The groove is intended to make contact with a DC diameter cable. - The inner surface is intended to be in contact with the cable guide pulley. -On the plane that confines the axis of rotation of the cable guide pulley, the groove generates a ledge angle A between the tangent imaginary line with respect to the outer profile of the groove at the radially outermost point of the groove and the axis of rotation of the cable guide pulley. - In the meridional plane of the cable guide pulley, the outer profile of the groove includes a gradual change in the radius of curvature from the innermost point of the groove to the radially outermost point of the groove.

[0018] This arrangement provides improvements to the service life and durability performance through the proper outer profile (outer side profile) of the groove.

[0019] Since the outer side profile of the groove includes a gradual change in the radius of curvature, such an outer side profile does not induce a transition effect at the junction between two arcs of different radii, especially with respect to the contact pressure and shear of the elastomeric composition constituting the device (lining), because the curvature changes abruptly at the connection point of the arcs of different radii. It is possible to make the contact pressure levels more uniform under the cable, which provides an increase in the service life and durability performance of the device (lining).

[0020] In another preferred embodiment, in the meridian plane of the cable guide pulley, the gradual change in the radius of curvature with respect to the outer side profile of the groove is a portion of a conic section.

[0021] This arrangement enables the design of the outer side profile of the groove to efficiently make the contact pressure levels more uniform under the cable.

[0022] In another preferred embodiment, in the meridian plane of the cable guide pulley, the gradual change in the radius of curvature with respect to the outer side profile of the groove is a portion of an ellipse, and the major axis of the ellipse is substantially parallel to the axial direction.

[0023] This arrangement can increase the service life and durability performance of the device (lining). This is because the outer side profile of the groove has a large radius at the center of the groove, which further equalizes the contact pressure levels under the cable, and at the same time has a small radius around the edge of the groove, resulting in stress reduction for the elastomeric composition constituting the device (lining) without inducing a transition effect and providing better cable guidance.

[0024] In another preferred embodiment, the ellipticity of the ellipse (the ratio of the length of the semi - minor axis to the length of the major axis) is between 0.20 and 0.96.

[0025] When the ellipticity of the ellipse is greater than 0.96, the outer profile of the groove at the center of the groove is too flat, which risks excessive contact pressure at the center of the groove. When the ellipticity of the ellipse is less than 0.20, the contact pressure at the edge of the groove, where the maximum shear stress and relative sliding stress occur between the cable and the elastomer composition constituting the device (liner), is at risk of being excessive because the outer profile of the groove at the edge of the groove is too small. By setting the ellipticity of the ellipse between 0.20 and 0.96, the contact pressure level under the cable can be made more uniform, thereby providing an increased service life and durability of the device (lining).

[0026] The ellipticity of the ellipse is preferably between 0.33 and 0.84, and more preferably between 0.50 and 0.84.

[0027] In another preferred embodiment, the groove depth D is between 7% and 35% of the diameter DC of the cable to be guided.

[0028] If the groove depth D is less than 7% of the diameter DC of the cable being guided, the groove is too shallow, and there is a risk that the cable will fall out of the groove. If the groove depth D is greater than 35% of the diameter DC of the cable being guided, the centralizing force generated by the groove is too large, and there is a risk that the contact pressure at the edge of the groove will be excessive. By setting the groove depth D between 7% and 35% of the diameter DC of the cable being guided, the contact pressure level under the cable can be made more uniform, thereby providing an increased service life and durability of the device (lining) and ensuring proper guidance of the cable being guided.

[0029] The groove depth D is preferably between 10% and 30% of the diameter DC of the cable to be guided, and more preferably between 12% and 25% of the diameter DC of the cable to be guided.

[0030] In another preferred embodiment, the ledge angle A is between 12° and 80°.

[0031] If the ledge angle A is less than 12°, the centralizing force generated by the groove is too small, posing a risk of the cable falling out of the groove. If the ledge angle A is greater than 80°, the centralizing force generated by the groove is too large, posing a risk of excessive contact pressure at the groove edge. By setting the ledge angle A between 12° and 80°, the contact pressure level under the cable can be made more uniform, thereby increasing the service life and durability of the device (lining) and ensuring proper guidance of the cable being guided.

[0032] The ledge angle A is preferably between 20° and 45°, and more preferably between 30° and 40°.

[0033] In another preferred embodiment, the width W of the groove is between 105% and 180% of the diameter DC of the cable to be guided.

[0034] If the groove width W is less than 105% of the diameter DC of the cable being guided, the groove width is too small relative to the diameter DC, posing a risk of the cable falling out of the groove. If the groove width W is greater than 180% of the diameter DC of the cable being guided, the groove width is too wide relative to the diameter DC of the cable, posing a risk of vibration, which can also induce the cable to fall out. By setting the groove width W between 105% and 180% of the diameter DC of the cable being guided, it is possible to provide proper guidance for the cable.

[0035] The groove width W is preferably between 120% and 160% of the diameter DC of the cable being guided.

[0036] In another preferred embodiment, the device (lining) includes at least one reinforcing section placed within its volume.

[0037] This arrangement allows the reinforcing section placed within the volume to provide better fastening of the device (lining) to rigid members such as wheels, hubs, or pulleys on which the device (lining) is assembled, thereby increasing the service life of the device (lining).

[0038] The above arrangement provides a device intended to form a cable guide pulley device (lining), such a device (lining) can provide improvements to service life and durability through the appropriate outer profile of the groove.

[0039] Other features and advantages of the present invention will arise from the following description with reference to the accompanying drawings which illustrate embodiments of the present invention as non-limiting examples. [Brief explanation of the drawing]

[0040] [Figure 1] This is a schematic cross-sectional view of a device having a cable guide pulley according to an embodiment of the present invention. [Figure 2] This is a schematic enlarged view of a device having a guiding cable according to an embodiment of the present invention. [Modes for carrying out the invention]

[0041] Preferred embodiments of the present invention are described below with reference to the drawings.

[0042] Device 1 according to an embodiment of the present invention will be described below with reference to Figures 1 and 2.

[0043] Figure 1 is a schematic cross-sectional view of a device having a cable guide pulley according to an embodiment of the present invention. Figure 2 is a schematic enlarged view of a device having a cable guide pulley according to this embodiment of the present invention.

[0044] The cable guide pulley 99 has a rotation axis XX' and includes two flanges 97 that are spaced apart axially and define the axial end of the cable guide pulley 99, and a hub 95 on which the cable guide pulley 99 is mounted so that it can rotate along the rotation axis XX' on a fixed spindle. The horizontal center of the cable guide pulley 99 is indicated by YY'.

[0045] Device 1 is a device intended to form a lining for the cable guide pulley 99 on the radially outward-facing portion of the cable guide pulley 99, which is surrounded by two flanges 97. Device 1 (lining) has an outer surface 5 facing radially outward, which has a groove 4 with a depth D, where the depth D is the radial distance between the radially outermost and radially innermost points of the groove 4, and the width W is the axial distance between the two axial ends of the groove 4, which is intended to contact a cable (shown in Figure 2) with a diameter DC, and an inner surface 6 intended to contact the cable guide pulley 99.

[0046] As shown in Figure 1, the device 1 (lining) includes at least one reinforcing section 3 placed within the volume 2 of the device 1 (lining) at the radially innermost portion of the device 1 (lining). The at least one reinforcing section 3 includes a plurality of reinforcing belts 31 consisting of substantially circumferentially oriented parallel reinforcing strings, cords, or wires (not shown) wrapped in at least one elastomer composition for the reinforcing section 3 to ensure sufficient fastening of the device 1 (lining) onto a rigid member which is a cable guide pulley 99.

[0047] As shown in Figures 1 and 2, on the plane that encloses the rotation axis of the cable guide pulley 99, the groove 4 forms a ledge angle A between a virtual line tangent to the outer profile 41 of the groove 4 and the rotation axis of the cable guide pulley 99 at the radially outermost point of the groove 4, and the outer profile 41 of the groove 4 includes a gradual change in the radius of curvature.

[0048] As shown in Figure 2, the gradual change in the radius of curvature of the groove 4 relative to the outer profile 41 is a segment of a conic section. A conic section can be a quadratic curve such as an ellipse, parabola, or hyperbola. In this embodiment of the present invention, the gradual change in the radius of curvature of the groove 4 relative to the outer profile 41 is a segment of an ellipse, and the semi-major axis SMJ of the ellipse is substantially parallel to the axial direction.

[0049] As shown in Figure 2, the ellipticity of an ellipse, that is, the ratio of the length of the semi-minor axis SMA to the length of the semi-major axis SMJ, is between 0.20 and 0.96. In this embodiment of the present invention, the ellipticity of the ellipse is 0.54.

[0050] As shown in Figure 2, the depth D of the groove 4 is between 7% and 35% of the diameter DC of the cable 90 being guided, the ledge angle A is between 12° and 80°, and the width W of the groove 4 is between 105% and 180% of the diameter DC of the cable 90 being guided. In this embodiment of the present invention, the depth D of the groove 4 is 20% of the diameter DC of the cable 90 being guided, the ledge angle A is 40°, and the width W of the groove 4 is 130% of the diameter DC of the cable 90 being guided.

[0051] Since the outer profile 41 of the groove 4 includes a gradual change in the radius of curvature, such an outer profile 41 does not induce a transition effect at the joint between two arcs of different radii, particularly with respect to the contact pressure and shear of the elastomer composition constituting the device 1 (lining), as the curvature changes abruptly at the joint of arcs of different radii. This makes it possible to make the contact pressure level more uniform under the cable 90, thereby increasing the service life and durability of the device 1 (lining).

[0052] Since the gradual change in the radius of curvature of the groove 4 relative to the outer profile 41 is part of a cone curve, it is possible to design the outer profile 41 of the groove to efficiently make the contact pressure level more uniform under the cable 90.

[0053] The gradual and gradual change in the radius of curvature of the outer profile 41 of the groove 4 is part of an ellipse, and the semi-major axis of the ellipse is substantially parallel to the axial direction, which can increase the service life and durability of the device 1. This is because the outer profile 41 of the groove 4 has a large radius at the center of the groove 4, which further equalizes the contact pressure level under the cable 90, while the small radius around the edge of the groove 4 reduces stress on the elastomer composition constituting the device 1 (lining) without inducing a transition effect, thus providing better guidance for the cable 90.

[0054] Since the ellipticity of the ellipse (the length of the semi-minor axis divided by the length of the major axis) is between 0.20 and 0.96, the contact pressure level under the cable 90 can be made more uniform, thereby providing an increased service life and durability of device 1 (lining).

[0055] If the ellipticity of the ellipse is greater than 0.96, there is a risk of excessive contact pressure at the center of the groove 4 because the outer profile 41 of the groove at the center of the groove 4 is too flat. If the ellipticity of the ellipse is less than 0.20, there is a risk of excessive contact pressure at the edge of the groove 4, which experiences the maximum shear stress and relative sliding stress between the cable 90 and the elastomer composition constituting the device 1 (liner), because the outer profile 41 of the groove at the edge of the groove 4 is too small.

[0056] The ellipticity of the ellipse is preferably between 0.33 and 0.84, and more preferably between 0.50 and 0.84.

[0057] Since the depth D of the groove 4 is between 7% and 35% of the diameter DC of the cable 90 being guided, the contact pressure level under the cable 90 can be made more uniform, thereby providing an increased service life and durability of the device 1 (lining) and ensuring proper guidance of the cable 90 being guided.

[0058] If the depth D of groove 4 is less than 7% of the diameter DC of the cable 90 being guided, there is a risk that the cable will fall out of groove 4 because the groove 4 is too shallow. If the depth D of groove 4 is greater than 35% of the diameter DC of the cable 90 being guided, there is a risk that the centralizing force generated by groove 4 will be too large, resulting in excessive contact pressure at the edge of groove 4.

[0059] The depth D of the groove 4 is preferably between 10% and 30% of the diameter DC of the cable 90 to be guided, and more preferably between 12% and 25% of the diameter DC of the cable 90 to be guided.

[0060] Since the ledge angle A is between 12° and 80°, the contact pressure level under the cable 90 can be made more uniform, thereby providing an increased service life and durability of device 1 (lining) and providing correct guidance for the cable 90 being guided.

[0061] The ledge angle A is preferably between 20° and 45°, and more preferably between 30° and 40°.

[0062] Since the width W of groove 4 is between 105% and 180% of the diameter DC of the cable 90 to be guided, it is possible to provide correct guidance for the cable 90.

[0063] If the width W of groove 4 is less than 105% of the diameter DC of the cable 90 being guided, the groove width is too small relative to the diameter DC of the cable 90 being guided, and there is a risk that the cable will fall out of groove 4. If the width W of groove 4 is greater than 180% of the diameter DC of the cable 90 being guided, the groove width is too wide relative to the diameter DC of the cable 90 being guided, and there is a risk of vibration occurring, which may also induce the cable to fall out.

[0064] The width W of the groove 4 is preferably between 120% and 160% of the diameter DC of the cable 90 to be guided.

[0065] Since device 1 (lining) includes at least one reinforcing section 3 placed in volume 2, the reinforcing section 3 placed in volume 2 provides better fastening of device 1 (lining) to rigid members such as wheels, hubs, or pulleys on which device 1 (lining) is assembled to guarantee the load capacity of device 1 (lining), thus increasing the service life of device 1 (lining).

[0066] Examples of reinforcing belts 31 include metal or woven strings, cords, cables, wires, or sheets containing straight or wavy threads that extend with or without angles along the circumferential direction.

[0067] The interface between volume 2 and reinforcing section 3 may be of any of the following shapes, for example, linear, wavy, zigzag, or conical.

[0068] Device 1 (liner) can be provided so as to be positioned partially radially outward on the flange 97. Device 1 (liner) can be provided so as to have a shape in which at least one of its axial ends is chamfered.

[0069] The cable guide pulley 99 is preferably made of a material selected from a composite material consisting of steel or an alloy of aluminum and / or magnesium, and a composite material based on carbon fiber, glass fiber, aramid fiber, or plant fiber, wherein the fibers are contained within a matrix material based on a thermosetting or thermoplastic compound, or a composite compound containing an elastomer, and a composite material consisting of a resin and fibers selected from carbon fiber, glass fiber, aramid fiber, plant fiber, or any combination thereof.

[0070] The thermosetting compound-based matrix is ​​selected from epoxy resins, vinyl esters, unsaturated polyesters, ester cyanates, bismaleimides, acrylic resins, phenolic resins, polyurethanes, and combinations thereof.

[0071] The thermoplastic compound-based matrix materials are selected from polypropylene (PP), polyethylene (PE), polyamide (PA), semi-aromatic polyamide, polyester (PET), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), polyether ketone ketone (PEKK), polyether sulfone (PSU), polyetherimide (PEI), polyimide (PI), polyamideimide (PAI), polyphenylene sulfide (PPS), polyoxymethylene (POM), and polyphenylene oxide (PPO).

[0072] The elastomer composition for volume 2 and / or reinforcing section 3 can be made from a rubber-like elastomer that can be crosslinked by other specific atomic chains of thermoplastic elastomers (TPEs) by a chemical vulcanization reaction with sulfur crosslinking, or by carbon-carbon bonds generated by the action of peroxides or ionizing radiation, forming a network between the elastomer module, the elastically deformable portion and the relatively deformable "hard" regions. The cohesive forces of the "hard" regions are products of physical connections (microcrystalline or amorphous regions above their glass transition temperature), non-thermoplastic elastomers, and thermosetting resins.

[0073] Volume 2 and / or reinforcing section 3 may be composed of more than two different elastomer compositions stacked, laminated, or in any suitable manner. Volume 2 may be provided with one or more other reinforcing bodies and / or reinforcing belts known in the art of the present invention.

[0074] The shape of the reinforcing section 3 can be any shape deemed appropriate, such as a circle, ellipse, rectangle, or polygon.

[0075] The stiffness of the elastomer composition constituting volume 2 and / or reinforcing section 3 can be evaluated by the tensile modulus MA10, measured at 10 percent (10%) elongation and a temperature of 23°C in accordance with ASTM D412.

[0076] The tensile modulus MA10 of the elastomer composition constituting the reinforcing section 3 can be at least 25%, preferably at least 30%, and more preferably at least 40%, higher than the tensile modulus MA10 of the elastomer composition constituting volume 2.

[0077] The preferred tensile modulus MA10 of the elastomer composition constituting volume 2 can be less than or equal to 8.0 MPa, more preferably less than or equal to 7.0 MPa, and more preferably less than or equal to 6.0 MPa.

[0078] The preferred tensile modulus MA10 of the elastomer composition constituting the reinforcing section 3 can be greater than or equal to 10.0 MPa, more preferably greater than or equal to 12.0 MPa, and more preferably greater than or equal to 14.0 MPa.

[0079] The present invention is not limited to the examples described, and various modifications can be made within its framework without deviating from it.

[0080] Reference Code List • 1 device • 2. Volume of the device (lining) • 3 Reinforcement Sections 31 Reinforcement belt ·4 grooves 41 Outer profile of groove ·5 External surface 6. Inner self 90 Cables 95 Hub 97 Flange 99 Cable guide pulley

Claims

1. The device (1) includes a device (1) intended to form a lining for a cable guide pulley (99), wherein the device (1) has an outer surface (5) facing radially outward, - A groove (4) having a depth D, wherein the depth D is the radial distance between the radially outermost point and the radially innermost point of the groove (4) having a width W, the width W is the axial distance between the two axial ends of the groove (4), and the groove (4) has an outer profile (41), Includes, - The groove (4) is intended to contact the DC diameter cable (90), - The inner surface (6) is intended to be in contact with the cable guide pulley (99), On the plane that encloses the rotation axis of the cable guide pulley (99), the groove (4) generates a ledge angle A between the tangent imaginary line with respect to the outer profile (41) of the groove (4) and the rotation axis of the cable guide pulley (99) at the radially outermost point of the groove (4). It is a cable guide pulley, The device described above, In the meridional plane of the cable guide pulley (99), the outer profile (41) of the groove (4) includes a gradual change in the radius of curvature from the innermost point of the groove (4) to the radially outermost point of the groove (4), and In the meridional plane of the cable guide pulley (99), the gradual change in the radius of curvature of the groove (4) relative to the outer profile (41) is a part of a cone curve. Characterized by, Cable guide pulley.

2. In the meridional plane of the cable guide pulley (99), the gradual change in the radius of curvature of the groove (4) relative to the outer profile (41) is part of an ellipse. The semi-major axis of the ellipse is substantially parallel to the axial direction. The cable guide pulley according to claim 1.

3. The cable guide pulley according to claim 2, wherein the ellipticity of the ellipse (the length of the semi-minor axis divided by the length of the major axis) is between 0.20 and 0.96, preferably between 0.33 and 0.84, and more preferably between 0.50 and 0.

84.

4. The cable guide pulley according to any one of claims 1 to 3, wherein the depth D of the groove (4) is between 7% and 35% of the diameter DC of the cable (90) to be guided, preferably between 10% and 30% of the diameter DC of the cable (90) to be guided, and more preferably between 12% and 25% of the diameter DC of the cable (90) to be guided.

5. The cable guide pulley according to any one of claims 1 to 4, wherein the ledge angle A is between 12° and 80°, preferably between 20° and 45°, and more preferably between 30° and 40°.

6. The cable guide pulley according to any one of claims 1 to 5, wherein the width W of the groove (4) is between 105% and 180% of the diameter DC of the cable (90) to be guided, preferably between 120% and 160% of the diameter DC of the cable (90) to be guided.

7. The cable guide pulley according to any one of claims 1 to 6, wherein the device (1) comprises at least one reinforcing section (3) placed in a volume (2).

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