WO2021125112A1 - Bandage pneumatique - Google Patents

Bandage pneumatique Download PDF

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Publication number
WO2021125112A1
WO2021125112A1 PCT/JP2020/046417 JP2020046417W WO2021125112A1 WO 2021125112 A1 WO2021125112 A1 WO 2021125112A1 JP 2020046417 W JP2020046417 W JP 2020046417W WO 2021125112 A1 WO2021125112 A1 WO 2021125112A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
belt
cord
spiral belt
circumferential direction
Prior art date
Application number
PCT/JP2020/046417
Other languages
English (en)
Japanese (ja)
Inventor
正之 有馬
Original Assignee
株式会社ブリヂストン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2019230928A external-priority patent/JP7377698B2/ja
Priority claimed from JP2019230929A external-priority patent/JP7377699B2/ja
Application filed by 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Publication of WO2021125112A1 publication Critical patent/WO2021125112A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre

Definitions

  • the present disclosure relates to a pneumatic tire having a belt with a resin layer.
  • a pneumatic tire to be mounted on an automobile there is a pneumatic tire provided with a belt formed of a resin layer on the outer side of the carcass in the radial direction (see, for example, Japanese Patent Application Laid-Open No. 2007-069745).
  • the curved belt has a double curvature near the end of the belt, which is a curvature of the curvature in the tire circumferential direction and a curvature of the curvature in the tire width direction.
  • the belt on the ground side is deformed linearly in the circumferential direction when viewed from the tire side. Further, when viewed from the front of the tire, the curved portions on both sides in the width direction of the belt on the ground contact side are deformed in the direction in which the curvature is increased, in other words, the belt is deformed substantially linearly. Therefore, when the pneumatic tire is used for traveling, the vicinity of the end portion in the width direction of the belt is distorted due to the deformation in the circumferential direction and the deformation in the width direction.
  • the pneumatic tire of JP-A-2007-069745 has a two-layer structure in which reinforcing cords made of organic fiber cords such as steel cords and aramid cords that are inclined and extend in the tire circumferential direction are arranged in the tire circumferential direction.
  • the belt of the so-called interlaced layer is described, and it is described that the reinforcing layer in which the reinforcing cord is embedded in the resin layer is used for the belt.
  • the purpose of this disclosure is to provide a pneumatic tire capable of suppressing distortion caused in the resin of the belt.
  • the pneumatic tire according to the first aspect has a carcass straddling from one bead portion to the other bead portion and a belt cord arranged outside the carcass in the tire radial direction and spirally wound in the tire circumferential direction.
  • there is at least a shear-suppressing reinforcing layer arranged from the belt end of the spiral belt to the outermost peripheral main groove in the tire width direction.
  • the shear suppression reinforcing layer is arranged along the spiral belt from at least the belt end of the spiral belt to the outermost circumferential main groove in the tire width direction, at least the spiral belt The shear strain generated in the portion from the belt end to the outermost peripheral main groove in the tire width direction can be suppressed by the shear suppression reinforcing layer.
  • the pneumatic tire of the present disclosure has an excellent effect that the distortion generated in the resin of the belt can be suppressed.
  • the pneumatic tire 10 of the present embodiment is, for example, a so-called radial pneumatic tire used in a passenger car, includes a pair of bead portions 20 in which a bead core 12 is embedded, and one bead portion 20.
  • a carcass 16 composed of one carcass ply 14 straddles between the bead portion 20 and the other bead portion 20.
  • the carcass ply 14 is formed by coating a plurality of cords (not shown) extending in the radial direction of the pneumatic tire 10 with coated rubber (not shown). That is, the pneumatic tire 10 of the present embodiment is a so-called radial pneumatic tire.
  • the material of the cord of the carcass ply 14 is, for example, PET, but other conventionally known materials may be used.
  • the carcass ply 14 has a bead core 12 folded outward in the tire radial direction at the end portion in the tire width direction.
  • the portion extending from one bead core 12 to the other bead core 12 is called a main body portion 14A, and the portion folded back from the bead core 12 is called a folded portion 14B.
  • the cross-sectional shape of the main body 14A of the carcass ply 14 in the pneumatic tire 10 of the present embodiment is the same cross-sectional shape as that of a conventional general pneumatic tire, and the radius around the tire equatorial plane CL is substantially constant and flat. Yes, the radius is gradually decreasing near the shoulder.
  • a bead filler 18 whose thickness gradually decreases from the bead core 12 toward the outside in the tire radial direction is arranged between the main body portion 14A and the folded-back portion 14B of the carcass ply 14.
  • the bead portion 20 is a portion of the bead filler 18 inside the tire radial direction from the outer end 18A in the tire radial direction.
  • An inner liner 22 made of rubber is arranged inside the pneumatic tire of the carcass 16.
  • the bead portion 20 and the side rubber layer 24A forming the outer surface of the side portion 24 are arranged.
  • the tire case 25 is composed of the bead core 12, the carcass 16, the bead filler 18, the inner liner 22, and the side rubber layer 24A.
  • the tire case 25 is a pneumatic tire skeleton member forming the skeleton of the pneumatic tire 10.
  • a spiral belt 26 for restraining the outer peripheral portion of the carcass 16 and obtaining a tag effect is arranged on the outside of the crown portion of the carcass 16, in other words, the outside of the carcass 16 in the tire radial direction.
  • the spiral belt 26 of the present embodiment is formed almost entirely flat when viewed in a cross section along the rotation axis, in other words, the central portion in the tire width direction is formed in a straight line parallel to the tire rotation axis.
  • both ends in the tire width direction have a smaller radius of curvature than the central portion in the tire width direction, and are curved inward in the tire radial direction.
  • the spiral belt 26 of the present embodiment is formed by spirally winding a resin-coated cord 34 in which a plurality of (two in the present embodiment) belt cords 30 are coated with a resin material 32. Therefore, the belt cord 30 is substantially parallel to the tire circumferential direction (strictly speaking, the belt cord 30 is inclined by several degrees in the tire circumferential direction). Further, when the spiral belt 26 is viewed in a plan view, the belt cords 30 are arranged in parallel with each other.
  • the belt cord 30 of the spiral belt 26 can be composed of a monofilament (single wire) such as a metal fiber or an organic fiber, or a multifilament (twisted wire) obtained by twisting these fibers.
  • the belt cord 30 of this embodiment is a steel cord.
  • a “1 ⁇ 5” steel cord having a diameter of 0.225 mm can be used, but a steel cord having another conventionally known structure can also be used.
  • a rubber material that constitutes the side rubber layer 24A and a resin material that has a higher tensile elastic modulus than the rubber material that constitutes the tread rubber layer 36A that constitutes the tread 36 described later is used. Can be done.
  • an elastic thermoplastic resin, a thermoplastic elastomer (TPE), a thermosetting resin, or the like can be used. Considering the elasticity during running and the moldability during manufacturing, it is desirable to use a thermoplastic elastomer.
  • thermoplastic elastomer examples include polyolefin-based thermoplastic elastomer (TPO), polystyrene-based thermoplastic elastomer (TPS), polyamide-based thermoplastic elastomer (TPA), polyurethane-based thermoplastic elastomer (TPU), and polyester-based thermoplastic elastomer (TPC). , Dynamic cross-linked thermoplastic elastomer (TPV) and the like.
  • TPO polyolefin-based thermoplastic elastomer
  • TPS polystyrene-based thermoplastic elastomer
  • TPA polyamide-based thermoplastic elastomer
  • TPU polyurethane-based thermoplastic elastomer
  • TPC polyester-based thermoplastic elastomer
  • TPV Dynamic cross-linked thermoplastic elastomer
  • thermoplastic resin examples include polyurethane resin, polyolefin resin, vinyl chloride resin, and polyamide resin.
  • the deflection temperature under load (at 0.45 MPa load) specified in ISO75-2 or ASTM D648 is 78 ° C. or higher
  • the tensile yield strength specified in JIS K7113 is 10 MPa.
  • JIS K7113 examples of the thermoplastic resin material
  • a tensile fracture elongation of 50% or more specified in JIS K7113 and a Bikat softening temperature (method A) specified in JIS K7206 of 130 ° C. or more can be used.
  • the tensile elastic modulus (specified in JIS K7113: 1995) of the resin material 32 that covers the belt cord 30 is preferably 100 MPa or more. Further, the upper limit of the tensile elastic modulus of the resin material 32 covering the belt cord 30 is preferably 1000 MPa or less. The tensile elastic modulus of the resin material 32 that covers the belt cord 30 is particularly preferably in the range of 200 to 700 MPa.
  • the thickness of the spiral belt 26 of the present embodiment is preferably larger than the diameter dimension of the belt cord 30, in other words, it is preferable that the belt cord 30 is completely embedded in the resin material 32.
  • the thickness of the spiral belt 26 is preferably 0.70 mm or more.
  • a tread rubber layer 36A made of an elastic material such as rubber constituting the tread 36 is arranged on the outer side of the spiral belt 26 in the tire radial direction.
  • the tread rubber layer 36A extends beyond the ground contact end 36E of the tread 36 toward the side portion 24, and also forms an outer surface of the shoulder portion (also referred to as a buttress portion) 38.
  • the ground contact end 36E means the end portion of the ground contact width TW described below.
  • the ground contact width TW of the tread 36 is that the pneumatic tire 10 is attached to the standard rim specified in JATMA YEAR BOOK (2019 version, Japan Automobile Pneumatic Tire Association standard), and the applicable size ply in JATTA YEAR BOOK.
  • Fill the internal pressure with 100% of the air pressure (maximum air pressure) corresponding to the maximum load capacity (internal pressure-load capacity correspondence table in bold) in the rating so that the rotation axis is parallel to the horizontal flat plate in a stationary state. It is the one when the mass corresponding to the maximum load capacity is added. If the TRA standard or ETRTO standard is applied at the place of use or manufacturing, the respective standards will be followed.
  • the shoulder portion 38 of the present embodiment refers to a region between the ground contact end 36E and the 77% position of the cross-sectional height SH of the pneumatic tire 10 as an example.
  • the tread 36 is formed with circumferential main grooves 40A and 40B extending along the tire circumferential direction.
  • a conventionally known pattern can be used, and a lateral groove (not shown) or the like may be formed.
  • the width BW of the spiral belt 26 measured along the tire axial direction is preferably 75% or more of the ground contact width TW of the tread 36 measured along the tire axial direction.
  • the upper limit of the width BW of the spiral belt 26 is preferably 110% with respect to the ground contact width TW.
  • the tread 36 is formed with circumferential main grooves 40A and 40B extending in the circumferential direction inside the ground contact end 36E in the tire width direction.
  • the belt end 26E of the spiral belt 26 may be covered with a layer containing an organic fiber cord or the like, if necessary.
  • a shear suppression reinforcing layer 48 is provided between the spiral belt 26 and the carcass 16.
  • the shear suppression reinforcing layer 48 is a reinforcing layer that suppresses shear distortion in the tire circumferential direction of the spiral belt 26, and can be rephrased as a belt reinforcing layer. Further, the shear suppressing reinforcing layer 48 can increase the in-plane rigidity of the spiral belt 26.
  • the shear suppression reinforcing layer 48 is arranged in a region extending from at least the belt end 26E of the spiral belt 26 to the outermost circumferential main groove 40B (groove end portion on the shoulder side) in the tire width direction.
  • the shear suppression reinforcing layer 48 is arranged on the shoulder side of the spiral belt 26 at a portion having a small radius of curvature of curvature and having a double curvature.
  • the shear suppression reinforcing layer 48 may be provided beyond the circumferential main groove 40B toward the tire equatorial plane CL side, or may be arranged up to the other belt end 26E (not shown in FIG. 1). ..
  • the shear suppression reinforcing layer 48 may be formed only of an elastic material 48A such as elastic rubber or resin, as shown in FIG. 2A, and as an example of a covering material, as shown in FIG. 2B. It may be a composite material composed of the elastic material 48A and the cord 48B for reinforcing the elastic material 48A. Further, although not shown, the elastic material 48A may be mixed with a reinforcing filler. As the filler mixed in the elastic material 48A, a known filler used for reinforcing the resin can be used.
  • the same type of resin as the resin material 32 coated with the belt cord 30 can be used, and a resin different from the resin material 32 should be used. You can also.
  • the resin used for the elastic material 48A a resin having a higher tensile elastic modulus than the resin material 32 coated with the belt cord 30 can be used.
  • rubber is used as the elastic material 34A, a rubber having a higher tensile elastic modulus than the resin material 32 coated with the belt cord 30 can be used as the rubber.
  • the shear suppression reinforcing layer 48 can be adhered to the spiral belt 26 and the carcass ply 14 by using an adhesive. Further, when a resin is used for the elastic material 48A, it can be fused with the resin material 32 coated with the belt cord 30.
  • cord 48B used for the shear suppression reinforcing layer 48 It is preferable to use a steel cord as the cord 48B used for the shear suppression reinforcing layer 48.
  • a steel cord When a steel cord is used, one having a lower bending rigidity than the belt cord 30 used for the spiral belt 26, in other words, one thinner than the belt cord 30 used for the spiral belt 26 can be used.
  • the cord 48B of the shear suppression reinforcing layer 48 extends so as to be inclined with respect to the tire circumferential direction (direction of arrow A in the drawing).
  • the code 48B does not extend along the tire circumferential direction and does not extend along the tire width direction orthogonal to the tire circumferential direction.
  • the inclination angle ⁇ of the code 48B with respect to the tire circumferential direction is appropriately selected as necessary.
  • the inclination angle ⁇ of the code 48B is preferably set within the range of 30 ° to 60 °.
  • the inclination direction of the code 48B with respect to the tire circumferential direction is not particularly limited. That is, when the shear suppression reinforcing layer 48 is viewed in a plan view from the outside in the tire radial direction, the cord 48B may be inclined upward to the right or upward to the left.
  • FIG. 3 is an explanatory diagram for explaining the distortion generated by the spiral belt 26 of the ground contact portion (the portion in contact with the road surface G shown in FIG. 1) 36C of the tread 36.
  • the ground contact portion 36C is viewed in a plan view from the outside of the tire (road surface side), the tire rotation direction is the direction indicated by the arrow R, and the traveling direction of the vehicle is the direction indicated by the arrow F.
  • the spiral belt 26 of the present embodiment is curved in the tire circumferential direction in the vicinity of the shoulder portion 38, in other words, in the vicinity of the belt end 26E, and is also curved in the tire width direction intersecting the tire circumferential direction, and is double. It has a curvature.
  • the curved portion of the spiral belt 26 is linearly deformed by the ground contact, and the spiral belt 26 is deformed from the linear shape to the curved shape to become the spiral belt 26 of the ground contact portion.
  • a portion T on which a tensile force in the tire circumferential direction acts and a portion C on which a compressive force in the tire circumferential direction acts are generated on the stepping side and the kicking side near the belt end.
  • the range from the belt end 26E to the outermost circumferential main groove 40B in the tire width direction is the portion where the spiral belt 26 has a double curvature, and during running, the spiral belt 26 has shear distortion in the tire circumferential direction. Is a part that is particularly likely to occur.
  • the shear suppression reinforcing layer 48 is arranged in the portion of the spiral belt 26 where the shear distortion is likely to occur, the shear strain generated in the spiral belt 26 can be effectively suppressed.
  • the pneumatic tire 10 Since there is a diameter difference between the inner peripheral surface and the outer peripheral surface of the spiral belt 26, the pneumatic tire 10 is used for running, and the spiral belt 26 is curved to linear on the stepping side due to contact with the road surface. When deformed to, a tensile force acts on the inner portion of the spiral belt 26 in the radial direction of the tire.
  • the cord 48B of the shear suppression reinforcing layer 48 arranged inside the spiral belt 26 in the tire radial direction is a steel cord that is difficult to extend with respect to tension, the tension acting on the spiral belt 26 is applied. It can receive the force and effectively suppress the deformation of the spiral belt 26. Since the steel cord can effectively receive not only the tensile force but also the compressive force, it is suitable as the cord 48B of the shear suppression reinforcing layer 48 for suppressing the shear strain of the spiral belt 26.
  • the spiral belt is compared with the case where the composite material is not used, in other words, the case where the resin alone or the rubber alone is used.
  • the effect of suppressing the shear strain of 26 can be enhanced.
  • the cord 48B extends at an angle with respect to the tire circumferential direction, in other words, extends in an interlaced manner with respect to the belt cord 30, so that the cord 48B extends with respect to the tire circumferential direction.
  • the effect of suppressing the shear distortion in the tire circumferential direction generated in the spiral belt 26 can be enhanced as compared with the case where the spiral belt 26 extends in the parallel direction or in the direction perpendicular to the tire circumferential direction, in other words, in the tire width direction.
  • the inclination angle ⁇ of the code 48B with respect to the tire circumferential direction is appropriately selected so as to suppress the shear distortion of the spiral belt 26 in the tire circumferential direction.
  • the cord 48B may be inclined with respect to the tire circumferential direction as needed, and may not be inclined with respect to the tire circumferential direction as long as the shear distortion in the tire circumferential direction can be suppressed, in other words, the cord. 48B may be parallel to the tire circumferential direction or may be parallel to the tire width direction. Further, the cord 48B may be provided as needed, and the shear suppressing reinforcing layer 48 may be composed of only the elastic material 48A as long as the shear strain in the tire circumferential direction can be suppressed.
  • the shear suppression reinforcing layer 48 of the present embodiment is configured by coating a plurality of cords 48B extending so as to increase to the left with respect to the tire circumferential direction with an elastic material 48A. It is a so-called interlaced layer in which the layer 50 of No. 1 and the second layer 52 formed by coating a plurality of cords 48B extending upwardly inclined with respect to the tire circumferential direction with an elastic material 48A are laminated. Either the first layer 50 or the second layer 52 may be inside in the tire radial direction.
  • the inclination angle ⁇ 1 of the code 48B of the first layer 50 with respect to the tire circumferential direction and the inclination angle ⁇ 2 of the code 48B of the second layer 52 with respect to the tire circumferential direction are set within the range of 30 to 60 °.
  • an organic fiber cord is used for the cord 48B used for the shear suppression reinforcing layer 48.
  • the material of the organic fiber cord include known organic materials used for tires such as PET (polyethylene terephthalate), aromatic polyamide, aliphatic polyamide, and rayon.
  • FIG. 6 is an explanatory diagram for explaining the distortion generated in the spiral belt 26 of the ground contact portion (the portion in contact with the road surface G during traveling) 36C of the tread 36.
  • the ground contact portion 36C is viewed in a plan view from the outside of the tire (road surface side), the tire rotation direction is the direction indicated by the arrow R, and the traveling direction of the vehicle is the direction indicated by the arrow F.
  • the pneumatic tire 10 of the second embodiment also has a spiral suppression reinforcing layer 48 arranged at a portion of the spiral belt 26 where shear distortion is likely to occur. The shear strain generated in the belt 26 can be effectively suppressed.
  • the shear suppression reinforcing layer 48 arranged inside the spiral belt 26 in the tire radial direction is an interlaced layer in which the cords 48B are interlaced, it is compared with the case where the cords 48B are not interlaced. Therefore, the deformation suppressing effect can be enhanced with respect to tension and compression, and the deformation of the spiral belt 26 can be effectively suppressed. That is, the shear suppression reinforcing layer 48 formed as an interlaced layer has a suitable configuration for suppressing the shear strain of the spiral belt 26.
  • the pneumatic tire 10 Since there is a diameter difference between the inner peripheral surface and the outer peripheral surface of the spiral belt 26, the pneumatic tire 10 is used for running, and the spiral belt 26 is curved to linear on the stepping side due to contact with the road surface. When deformed to, a tensile force acts on the inner portion of the spiral belt 26 in the radial direction of the tire.
  • the shear suppression reinforcing layer 48 arranged inside the spiral belt 26 in the tire radial direction is an interlaced layer that is strong against both tension and compression, the tension acting on the spiral belt 26 is applied. It can receive the force and effectively suppress the deformation of the spiral belt 26.
  • the cord 48B used for the shear suppression reinforcing layer 48 is used as a steel cord, but the cord 48B may be an organic fiber cord.
  • the shear suppressing reinforcing layer 48 is provided only on the carcass 16 side of the spiral belt 26, but as shown in FIG. 4, the shear suppressing reinforcing layer 48 is provided on the carcass 16 of the spiral belt 26. It may be provided on both the side and the tread side, and although not shown, the shear suppression reinforcing layer 48 may be provided only on the tread side of the spiral belt 26.
  • the shear suppression reinforcing layer 48 is provided only on the carcass 16 side of the spiral belt 26, but although not shown, the shear suppression reinforcement layer 48 is provided on the carcass 16 side of the spiral belt 26. It may be provided on both the tread 36 side and the tread 36 side, and the shear suppression reinforcing layer 48 may be provided only on the tread 36 side of the spiral belt 26.
  • the shear suppression reinforcing layer 48 of the second embodiment is the first layer 50 formed by coating a plurality of cords 48B extending so as to be inclined upward to the right with respect to the tire circumferential direction with an elastic material 48A.
  • a second layer 52 formed by coating a plurality of cords 48B extending in an upwardly leftward direction with respect to the tire circumferential direction with an elastic material 48A was laminated, but with respect to the tire circumferential direction.
  • a plurality of cords 48B extending diagonally upward to the right and a plurality of cords 48B extending diagonally upward to the left with respect to the tire circumferential direction may be overlapped and coated with an elastic material 48A.
  • the configuration may not be coated with the material 48A (ie, code 48B only).
  • the cord 48B used for the shear suppression reinforcing layer 48 is used as an organic fiber cord, but the cord 48B may be a steel cord.
  • the present disclosure can also be applied to tires of other types other than a passenger car, such as a tire for a bus, a tire for a truck, and a tire for a heavy load. ..

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

La présente invention concerne un bandage pneumatique ayant : une carcasse ; une ceinture en spirale configurée par revêtement, avec un matériau de résine, un câble de ceinture qui est disposé sur le côté extérieur de la carcasse dans la direction radiale du pneu et enroulée en spirale dans la direction circonférentielle du pneu ; une bande de roulement qui est disposée sur le côté radialement vers l'extérieur de la ceinture en spirale ; une pluralité de rainures principales de direction circonférentielle qui sont formées dans la bande de roulement le long de la direction circonférentielle du pneu ; et une couche de renforcement de prévention de cisaillement qui est disposée le long de la ceinture en spirale et qui est disposée, le long de la ceinture en spirale, au moins à partir d'une extrémité de ceinture de la ceinture en spirale vers la rainure principale de direction circonférentielle située la plus à l'extérieur dans le sens de la largeur du pneu.
PCT/JP2020/046417 2019-12-20 2020-12-11 Bandage pneumatique WO2021125112A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2019230928A JP7377698B2 (ja) 2019-12-20 2019-12-20 空気入りタイヤ
JP2019-230928 2019-12-20
JP2019230929A JP7377699B2 (ja) 2019-12-20 2019-12-20 空気入りタイヤ
JP2019-230929 2019-12-20

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WO2021125112A1 true WO2021125112A1 (fr) 2021-06-24

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PCT/JP2020/046417 WO2021125112A1 (fr) 2019-12-20 2020-12-11 Bandage pneumatique

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WO (1) WO2021125112A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008195264A (ja) * 2007-02-14 2008-08-28 Bridgestone Corp 空気入りタイヤ
WO2019220888A1 (fr) * 2018-05-14 2019-11-21 株式会社ブリヂストン Pneumatique
WO2019220887A1 (fr) * 2018-05-14 2019-11-21 株式会社ブリヂストン Pneumatique
WO2019230773A1 (fr) * 2018-05-31 2019-12-05 株式会社ブリヂストン Pneumatique
WO2019230770A1 (fr) * 2018-05-31 2019-12-05 株式会社ブリヂストン Pneu
WO2019244738A1 (fr) * 2018-06-19 2019-12-26 株式会社ブリヂストン Bandage pneumatique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008195264A (ja) * 2007-02-14 2008-08-28 Bridgestone Corp 空気入りタイヤ
WO2019220888A1 (fr) * 2018-05-14 2019-11-21 株式会社ブリヂストン Pneumatique
WO2019220887A1 (fr) * 2018-05-14 2019-11-21 株式会社ブリヂストン Pneumatique
WO2019230773A1 (fr) * 2018-05-31 2019-12-05 株式会社ブリヂストン Pneumatique
WO2019230770A1 (fr) * 2018-05-31 2019-12-05 株式会社ブリヂストン Pneu
WO2019244738A1 (fr) * 2018-06-19 2019-12-26 株式会社ブリヂストン Bandage pneumatique

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