• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a tire made of rubber material comprising a tread comprising a shoulder zone (8) and a graphic element (5). The graphic element (5) is hollowed out in the shoulder zone (8) and comprises a plurality of strands distributed in the graphic element in a density of at least five strands per square millimeter (mm 2), each strand having a average section between 0.0007 mm2 and 0.06 mm2 and / or the graphic element (5) comprises a plurality of lamellae substantially parallel to each other, the pitch of the lamellae being at most equal to 0.5 mm, all or part of lamellae having an average width of between 0.03 mm and 0.3 mm.
    公开号:FR3014365A1
    申请号:FR1362401
    申请日:2013-12-11
    公开日:2015-06-12
    发明作者:Eric Berger；Benoit Gardarin；Bruno Guimard；Olivier Muhlhoff
    申请人:Michelin Recherche et Technique SA Switzerland ；Compagnie Generale des Etablissements Michelin SCA；Michelin Recherche et Technique SA France；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION [01] The present invention relates to a tire for a motor vehicle comprising a particular graphic element. STATE OF THE ART [2] The sidewalls of tires have a large amount of 10 markings intended to give technical and legal information or to enable consumers to distinguish the origin of the product. [3] It is common ground to try to improve the visibility and readability of these markings on the sidewalls of tires. [4] US 2008/0283169 discloses a tire of rubber material comprising a flank and a marking formed on this sidewall. The marking is arranged in a housing made hollow in the sidewall. This marking is protruding from the bottom of the housing so that it has good visibility on the sidewall of the tire. [5] However, during running, a large amount of sludge or dust may become lodged in the housing thereby decreasing the contrast between the marking and the bottom of the housing. [6] There is therefore a need to propose a solution for maintaining a high contrast marking on the sidewall of a tire, during the running of this tire. DEFINITIONS [7] "Pneumatic" means all types of elastic bandages subjected to internal pressure or not. [8] "Tread" of a tire means a quantity of rubber material delimited by side surfaces and by two major surfaces, one of which is intended to come into contact with a roadway when the tire is rolling. [9] "Sidewall" of a tire means a side surface of the tire disposed between the tread of the tire and a bead of the tire. [10] "Graphic element" on a sidewall means all or part of a marking present on this sidewall. [11] "Strand" means a filamentary element whose height is at least equal to twice the diameter of a disc of the same surface as an average section 15 of this strand. [12] "Medium section" of a strand means the average of sections measured at regular intervals from the base of the strand to the top of that strand. [13] "Slat" means elongated strands having a length at least twice their height. [14] "Mean width" of a lamella means the average width measured at regular intervals from the base of the lamella to the top of this lamella. SUMMARY OF THE INVENTION [15] The invention relates to a tire made of rubber material comprising a tread comprising a shoulder zone and a graphic element. The graphic element is hollowed out in said shoulder zone and comprises a plurality of strands distributed in this graphic element in a density at least equal to five strands per square millimeter (mm2), each strand having a mean section of between 0.0007 mm 2 and 0.06 mm 2 and / or the graphic element comprises a plurality of lamellae substantially parallel to each other, the pitch of the lamellae being at most equal to 0.5 mm, all or part of the lamellae having an average width of between 0, 03 mm and 0.3 mm. [16] The texture, arranged in the graphic element and formed by strands or lamellae, brings a triple advantage. On the one hand, this texture makes it possible to "trap" all or part of the incident light rays that meet the graphic element. This makes it possible to give a blacker aspect to this graphic element and consequently it makes it possible to improve its contrast and thus its visibility with respect to the rest of the flank. On the other hand, this particular texture makes it possible to obtain a pleasant touch at the level of the graphic element, of the "velvet" type. Finally, the texture used has hydrophobic properties so that the evacuation of water, dust or mud out of the graphic element is facilitated. [17] In an alternative embodiment, the graphic element is selected from a group of graphic elements comprising at least: letters, numbers, symbols. [18] In another variant embodiment, the strands of the graphic element, respectively the lamellae of the graphic element, are flush with the shoulder zone of the tread of the tire. [19] In this way, these strands, respectively these strips, are in the extension of the outer surface of the shoulder zone of the tire. The overall visual impression of the shoulder area is thus improved. [20] In another alternative embodiment, the strands of the graphic element, respectively the lamellae of the graphic element, are recessed with respect to the shoulder zone of the tread of the tire. [21] The shoulder area of the tire thus protects the texture of strands and / or slats against mechanical aggression that can be exerted on this shoulder area. This improves the durability of the texture. [22] In another alternative embodiment, the strands of the graphic element, respectively the lamellae of the graphic element, protrude from the shoulder zone of the tread of the tire. [23] The emergent parts of the strands or slats have a certain flexibility because of their great slenderness. When the texture undergoes friction forces, these strands, respectively these lamellae deform by absorbing part of these friction forces. In this way, the graphic element is protected from wear and ensures greater durability. In addition, the fact that the strands, respectively the lamellae of the texture, protrude beyond the shoulder zone of the tread of the tire, generally improves the tactile effect of the texture. [24] In a preferred embodiment, a portion of the strands of the graphic element, respectively a portion of the lamellae of the graphic element protrude from the shoulder zone of the tread of the tire and another part of these strands, respectively these lamellae are set back from this shoulder zone. [25] In this way, a good balance is ensured between the protection of the texture on the one hand and the protection of the graphic element on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS [26] Other features and advantages of the invention will emerge from the following description, given by way of example, without limitation, with reference to the accompanying drawings, in which: FIG. 1 schematically represents a view in FIG. perspective of a tread comprising a shoulder zone and sidewall of a tire and a graphic element present on this shoulder zone; FIG. 2 illustrates the way in which the axial edge of a tread is determined according to a first method of determination; FIG. 3 illustrates the way in which the axial edge of a tread is determined according to a second method of determination; - Figure 4 shows a sectional view along the axis X-X 'of Figure 1, a graphic element, according to a first embodiment of the invention; - Figure 5 shows a sectional view along the axis X-X 'of Figure 1, a graphic element according to a second embodiment of the invention; FIG. 6 represents a sectional view along line X-X 'of FIG. 1, of a graphic element according to a third embodiment of the invention; FIG. 7 represents the state of the texture present in the graphic element of FIG. 6 when the shoulder zone undergoes mechanical forces; - Figure 8 shows a sectional view along the axis X-X 'of Figure 1, a graphic element according to a fourth embodiment of the invention; FIG. 9 represents a schematic view of a texture present in the graphic element of FIG. 1 and comprising strands; FIG. 10 represents a schematic view of a texture present in the graphic element of FIG. 1 and comprising lamellae. [27] In the following description, substantially identical or similar elements will be designated by identical references. [28] Figure 1 shows a sidewall 3 and a tread 2 of a tire 1. This tread 2 of tire 1 comprises a so-called useful area 6 which is intended to come into contact with the ground, and a zone shoulder 8 which is not intended to come into contact with the ground while traveling in a straight line and at service loads and pressures. Note that the tread 2 is composed of grooves 11 (also called sculptures). Also, the shoulder zone 8 also has grooves 11 as illustrated in FIG. 1. The shoulder zone 8 is a transition zone between the flank 3 and the useful zone 6. As illustrated in FIG. 8 includes a graphic element 5. This allows an observer of the tire to better visualize the graphic element 5.
    [0002] The graphic element 5 is hollowed out in said shoulder zone 8. The shoulder zone 8 being subjected to numerous air passages, the fact that the graphic element 5 is hollowed out makes it possible not to disturb the flow of the air on said shoulder zone 8. The graphic element 5 is located outside the vehicle to be visible. In a non-limiting embodiment, the graphic element 5 is located at a distance less than or equal to 30 mm from the transverse grooves 11 of the tread 2. In addition, in a non-limiting embodiment, the element graph 5 is located at a distance less than or equal to 30 mm from a wear zone of the tread 2, and to the outside thereof when the wear of the tread is at the wear indicators . [29] In nonlimiting examples, two methods are used to determine the width L of the shoulder zone 8. The width L of the shoulder zone 8 corresponds to the distance between a first axial edge 20 and a boundary 21. This boundary 21 more particularly, in the case of sector molds, this boundary 21 corresponds to the mold seal between a shell of the mold (molding the sidewall) and mold sectors (molding the zone). useful and the shoulder area of the tread). The way in which the width L of a shoulder zone 8 is determined is illustrated in FIGS. 2 and 3, which each show in particular the partial profile of a tread 2 and the part of a sidewall 3 which is adjacent to it in one direction. radial. In some tire architectures, the transition from the tread 2 to the sidewalls 3 is very clear, as in the case shown in FIG. 2, and the determination of the first axial edge 20 is easy. However, there are tire architectures where the transition between the tread 2 and the sidewalls 3 is continuous. An example is shown in Figure 3. In this figure, the first axial edge 20 of the tread 2 is determined as follows. In a radial section of the tire, the tangent to the tread surface is drawn at any point of said tread surface in the transition zone towards the sidewall 3. The first axial edge 20 is the point at which the angle (3 (Beta) between said tangent and an axial direction is equal to 30 ° .Where there are several points for which the angle (3 between said tangent and an axial direction is equal to 30 °), the most radially The first axial edge 20 represents one of the ends of the shoulder zone 8. The other end of the shoulder zone 8 is the border 21 between the sidewall 3 and the grooves 11 of the tread 2. the width L of the shoulder zone 8. [30] The graphic element 5 is here completely filled by a texture, this texture comprises a plurality of strands 7, as represented in FIG. a generally conical shape with a dimi section nuant in the Hb height of these strands. More particularly, the average section of each strand, corresponding to the average of sections S measured at regular intervals from the base of the strand, is between 0.0007 mm 2 and 0.06 mm 2. In the texture, the strands are distributed at a density of at least five strands per square millimeter. [31] In an alternative embodiment, the texture comprises a plurality of lamellae 9, as shown in FIG. 10. In this figure, the lamellae 9 have a generally triangular section and the average width of each lamella, corresponding to the average widths 1 measured at regular intervals in the height H1 of the lamella is between 0.03 mm and 0.3 mm. In the texture, the lamellae 9 are substantially parallel to one another and the pitch P of the lamellae is at least equal to 0.1 mm and at most equal to 0.5 mm. [32] In another embodiment, the texture comprises a combination of strands 7 and 9 lamellae. Thus, the texture (called "velvet") of the graphic element 5 absorbs the light and thus well visualize the letters, numbers or symbols composing said graphic element 5. The complementary parts to the graphic element 5 that one wishes to visualize are themselves provided with a texture favoring the return of light towards the observer. These are textures of low roughness. In the example of Figure 1, the complementary part of the graphic element "o" is the center of said "o". In a non-limiting example, the complementary parts (namely the non-recessed parts) have a roughness of average amplitude less than 0.2 mm. This provides a better contrast between the graphic element and the surrounding areas of the shoulder that reflect light. [33] Figure 4 shows a sectional view of the texture present in the graphic element 5 according to a first embodiment of the invention. This texture comprises strands 7 and / or lamellae 9. [34] More particularly, the strands 7 of the texture, respectively the lamellae 9 of the texture here, are flanked by the sidewall 3 of the tire, that is to say that the vertices of these strands 7, respectively the vertices of these lamellae 9 are at the same level as the upper surface 4 of the shoulder zone 8. [35] In an embodiment variant visible in FIG. 5, the strands 7 of the texture, respectively the lamellae 9 of the texture are recessed with respect to the shoulder zone 8, that is to say that the tops of these strands 7, respectively the apices of these strips 11 are below the upper surface 4 of the 8. [36] In another embodiment shown in Figure 6, the strands 7 of the texture, respectively the strips 9 of the texture, exceed the shoulder zone 8 of the tire, that is to say that the tops of these strands 7, respectively the tops of these strips 9 exceed the surface this upper 4 of the shoulder zone 8. In the event of friction of the sidewall of the tire at the level of the graphic element, the strands 7 and the lamellae 9 respectively flex, as can be seen in FIG. 7, by absorbing all or part of these rubs. [37] In another embodiment shown in Figure 8, a portion of the strands 7 of the texture, respectively a portion of the lamellae 9 of the texture 30 exceed the upper surface 4 of the shoulder zone 8 of the tire and another part of these strands 7, respectively of these strips 9 are set back in the graphic element. Preferably, at least 30% of the strands 7 and 9 respectively of the lamellae exceed the upper surface 4 of the shoulder zone 8. [38] Thus, having the graphic element 5 embedded and composed of strands and / or slats allows to protect the graphic element 5 of the sidewalk grating. Indeed, the friction forces resulting in abrasion are taken up by the rigid parts of the shoulder zone 8, and the pressure exerted on the graphical element 5 due to the friction forces is low due to the flexibility of said strands and / or slats. [39] The invention is not limited to the examples described and shown and various modifications can be made without departing from its scope. [40] The tire sidewall may comprise other graphic elements that do not have a texture as described in the invention. [41] Finally, the slats 9 of Figure 10 may be discontinuous. They have a flat part between them. In addition, they may have section differences between them. In addition, the slats may have curvatures or angles, especially in their length. They can, moreover, be of variable length. [42] Thus, the invention described has the following advantages in particular: - it makes it possible to obtain markings (graphic element) resistant to abrasions of the sidewalk grating type compared to unsupported micro-textures and consequently one obtains durability said markings in time; it makes it possible to obtain markings with very high visibility / contrast; and it makes it possible to gain aerodynamics at the shoulder zone by minimizing the relief markings in this zone. The aerodynamic profile of the tire and thus the vehicle is optimized.
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. Pneumatic rubber material comprising a tread (2) having a shoulder zone (8), and a graphical element (5), characterized in that the graphical element (5) is recessed in said shoulder zone (8). ), and comprises a plurality of strands (7) distributed in this graphic element in a density of at least five strands per square millimeter (mm 2), each strand (7) having a mean section of between 0.0007 mm 2 and 0, 6 mm 2 and / or the graphic element 10 (5) comprises a plurality of lamellae (9) substantially parallel to each other, the pitch of the lamellae being at most equal to 0.5 mm, all or part of the lamellae having an average width of between 0.03 mm and 0.3 mm.
    [0002]
    2. A tire according to claim 1, characterized in that the graphic element (5) is selected from a group of graphic elements comprising at least: - letters; - numbers; - symbols. 20
    [0003]
    3. A tire according to any one of claims 1 to 2, wherein the strands (7) of the graphic element, respectively the strips (9) of the graphic element, are flush with the shoulder zone (8) of the strip of tire bearing (2). 25
    [0004]
    4. A tire according to claim 1, wherein the strands (7) of the graphic element (5), respectively the strips (9) of the graphic element (5), are set back with respect to the shoulder zone (8). ) of the tread (2) of the tire.
    [0005]
    A tire according to claim 1, wherein the strands (7) of the graphic element (5), respectively the slats (9) of the graphic element (5), extend beyond the shoulder zone (8) of the strip of rolling (2) of the tire.
    [0006]
    6. A tire according to claim 1, wherein a portion of the strands (7) of the graphic element (5), respectively a portion of the slats (9) of the graphic element (5) protrude from the shoulder zone (8) of the tread (2) of the tire and another part of these strands (7), respectively of these strips (9) are set back with respect to this shoulder zone (8).
    类似技术:
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    同族专利:
    公开号 | 公开日
    JP2016539856A|2016-12-22|
    US20160303916A1|2016-10-20|
    BR112016012329A2|2017-12-05|
    EP3094506A1|2016-11-23|
    CN105813860A|2016-07-27|
    WO2015086447A1|2015-06-18|
    FR3014365B1|2017-01-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2204296A2|2005-10-21|2010-07-07|Société de Technologie Michelin|Tyre marking offering better visibility and tyre marking method|
    EP2483088B1|2009-09-28|2013-07-24|Compagnie Generale Des Etablissements Michelin|Tire having a high-contrast marking|FR3057209A1|2016-10-11|2018-04-13|Compagnie Generale Des Etablissements Michelin|PNEUMATIC HAVING A TEXTURE RING|
    CN108068557A|2016-11-11|2018-05-25|东洋橡胶工业株式会社|Pneumatic tire|GB2010755B|1977-12-23|1982-06-16|Dunlop Ltd|Shallow relief patterns on tyre sidewalls|
    JPH0624211A|1992-07-06|1994-02-01|Ohtsu Tire & Rubber Co Ltd :The|Structure of tire tread|
    JP4070308B2|1998-07-07|2008-04-02|株式会社ブリヂストン|Pneumatic tire with grooves extending from the tread pattern on the side wall surface|
    US6189586B1|1998-10-15|2001-02-20|Warren L. Guidry|Pneumatic rubber tire for on/off-road vehicles|
    DE602006013802D1|2005-03-16|2010-06-02|Bridgestone Corp|TIRES|
    MX2010008872A|2008-03-17|2010-08-31|Michelin Rech Tech|Tire with apertured shoulder block for improved temperature control.|
    FR2943275B1|2009-03-18|2015-05-15|Michelin Soc Tech|PNEUMATIC WITH PROTECTION WALLS|
    US20130228261A1|2010-08-31|2013-09-05|Bridgestone Corporation|Pneumatic tire|
    JP2012116217A|2010-11-29|2012-06-21|Bridgestone Corp|Tire|
    JP5520240B2|2011-02-10|2014-06-11|東洋ゴム工業株式会社|Pneumatic tire and method for manufacturing pneumatic tire|
    FR2976523B1|2011-06-15|2014-07-25|Michelin Soc Tech|PNEUMATIC COMPRISING A HIGH-CONTRAST PATTERN AND PATTERN PROTECTION RIBS|JP6220036B1|2016-11-30|2017-10-25|株式会社バンダイ|Model toy|
    EP3867080A1|2018-10-16|2021-08-25|Bridgestone Americas Tire Operations, LLC|Structure and method for marking tires|
    法律状态:
    2015-12-21| PLFP| Fee payment|Year of fee payment: 3 |
    2016-12-22| PLFP| Fee payment|Year of fee payment: 4 |
    2017-12-21| PLFP| Fee payment|Year of fee payment: 5 |
    2019-09-27| ST| Notification of lapse|Effective date: 20190906 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1362401A|FR3014365B1|2013-12-11|2013-12-11|PNEUMATIC COMPRISING A PARTICULAR GRAPHICAL ELEMENT|FR1362401A| FR3014365B1|2013-12-11|2013-12-11|PNEUMATIC COMPRISING A PARTICULAR GRAPHICAL ELEMENT|
    JP2016539135A| JP2016539856A|2013-12-11|2014-12-05|Tires containing specific graphic elements|
    EP14806663.2A| EP3094506A1|2013-12-11|2014-12-05|Tyre comprising a particular graphic element|
    PCT/EP2014/076685| WO2015086447A1|2013-12-11|2014-12-05|Tyre comprising a particular graphic element|
    US15/103,657| US20160303916A1|2013-12-11|2014-12-05|Tire Having a Particular Graphic Element|
    CN201480066801.6A| CN105813860A|2013-12-11|2014-12-05|Tyre comprising a particular graphic element|
    BR112016012329A| BR112016012329A2|2013-12-11|2014-12-05|tire comprising a special graphic element|
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