WO2019244788A1 - Pneu - Google Patents

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Publication number
WO2019244788A1
WO2019244788A1 PCT/JP2019/023638 JP2019023638W WO2019244788A1 WO 2019244788 A1 WO2019244788 A1 WO 2019244788A1 JP 2019023638 W JP2019023638 W JP 2019023638W WO 2019244788 A1 WO2019244788 A1 WO 2019244788A1
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WO
WIPO (PCT)
Prior art keywords
resin
tire
belt
width direction
region
Prior art date
Application number
PCT/JP2019/023638
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English (en)
Japanese (ja)
Inventor
鈴木　隆弘
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
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 WO2019244788A1 publication Critical patent/WO2019244788A1/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
    • 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 tire.
  • the tire disclosed in Patent Document 1 has an annular belt outside the tire frame member, and the annular belt is formed by spirally winding a resin-coated cord formed by coating a reinforcing cord with a resin. Is formed.
  • the present disclosure aims to improve cornering power while suppressing a decrease in ride comfort.
  • the tire according to the first aspect is provided with a tire frame member including a carcass, a tread formed of a rubber material, and a resin material provided between the tire frame member and the tread. And a resin reinforcement body in which a reinforcement cord wound in the tire circumferential direction is embedded, wherein the resin reinforcement body is located outside in the tire width direction when the entire tire width direction of the resin reinforcement body is taken as 100%.
  • a resin reinforcement body made of a resin material and embedded with a cord wound in the tire circumferential direction is provided between the tire frame member and the tread. Thereby, the rigidity of (the crown portion of) the tire frame member is increased.
  • the resin reinforcing body is formed such that the average thickness dimension of the outer region (the region 25% from the outer end in the width direction) is larger than the average thickness size of the central region (the region other than the outer region). ing.
  • the outer portion of the crown portion in the tire width direction is mainly increased in rigidity, and as a result, the cornering power is improved.
  • the rigidity of the central portion in the tire width direction in the crown portion is suppressed, and as a result, the reduction in ride comfort is suppressed. .
  • an arrow R direction indicates a tire radial direction
  • an arrow W direction indicates a tire width direction
  • the tire radial direction means a direction orthogonal to the tire rotation axis (not shown).
  • the tire width direction means a direction parallel to the tire rotation axis.
  • the tire width direction can also be referred to as the tire axial direction.
  • CL indicates the tire equatorial plane.
  • the tire 10 includes a pair of bead portions 20 in which the bead cores 12 are embedded.
  • a carcass 16 composed of one carcass ply 14 straddles between one bead portion 20 and the other bead portion 20.
  • FIG. 1 shows the shape of the tire 10 in a natural state before air filling.
  • the carcass ply 14 is formed by coating a plurality of cords (not shown) extending in the radial direction of the tire 10 with a coating rubber (not shown). That is, the tire 10 of the present embodiment is a so-called radial tire.
  • the cord material of the carcass ply 14 is, for example, PET, but may be another known material.
  • the end portion of the carcass ply 14 has the bead core 12 folded back in the tire radial direction.
  • a portion of the carcass ply 14 that extends from one bead core 12 to the other bead core 12 is called a main body portion 14A, and a portion that is folded back from the bead core 12 is called a folded portion 14B.
  • Bead fillers 18 whose thickness gradually decreases from the bead core 12 to the outside in the tire radial direction are disposed between the main body portion 14A and the folded portion 14B of the carcass ply 14. Note that, in the tire 10, a portion inside the tire radial direction from the tire radial outer end 18 ⁇ / b> A of the bead filler 18 is a bead portion 20.
  • An inner liner 22 made of a rubber material is arranged inside the tire of the carcass 16, and a side rubber layer 24 made of a rubber material is arranged outside the carcass 16 in the tire width direction.
  • the tire core member 25 which forms the skeleton of the tire 10, is formed by the bead core 12, the carcass 16, the bead filler 18, the inner liner 22, and the side rubber layer 24.
  • the tire frame member 25 includes a pair of bead portions 20, a pair of side portions, and a crown portion.
  • the side part is a part that forms the side part of the tire 10 and is gently curved so as to protrude outward from the bead part 20 toward the crown part in the tire rotation axis direction.
  • the crown portion is a portion that connects the pair of side portions to each other in the tire width direction, and is a portion that supports a tread 36 described later.
  • An annular belt 26 is arranged outside the crown portion of the tire frame member 25, in other words, outside the carcass 16 in the tire radial direction.
  • the belt 26 is joined to the outer peripheral surface of the carcass 16.
  • the belt 26 is formed by spirally winding a resin-coated cord 34 in which two reinforcing cords 30 are covered with a resin 32. The method of manufacturing the belt 26 will be described later.
  • the reinforcing cord 30 of the belt 26 is thicker than the cord of the carcass ply 14 and has high strength (tensile strength).
  • the reinforcing cord 30 of the belt 26 can be composed of a monofilament (single wire) such as a metal fiber or an organic fiber, or a multifilament (stranded wire) obtained by twisting these fibers.
  • the reinforcing cord 30 of the present 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.
  • thermoplastic resin having elasticity 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). And dynamically crosslinked thermoplastic elastomers (TPV).
  • 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
  • TEV dynamically crosslinked thermoplastic elastomers
  • thermoplastic resin examples include a polyurethane resin, a polyolefin resin, a vinyl chloride resin, and a polyamide resin.
  • the deflection temperature under load (under a load of 0.45 MPa) specified in ISO75-2 or ASTM D648 is 78 ° C. or more
  • the tensile yield strength specified in JIS K7113 is 10 MPa.
  • a material having a tensile elongation at break specified in JIS K 7113 of 50% or more and a Vicat softening temperature (A method) specified in JIS K 7206 of 130 ° C. or more can be used.
  • the tensile modulus of elasticity of the resin 32 that covers the reinforcing cord 30 (defined by JIS K7113: 1995) is preferably 50 MPa or more.
  • the upper limit of the tensile modulus of the resin 32 covering the reinforcing cord 30 is preferably 1000 MPa or less.
  • the tensile modulus of the resin 32 covering the reinforcing cord 30 is particularly preferably in the range of 200 to 500 MPa.
  • a tread 36 made of a rubber material is disposed outside the belt 26 in the tire radial direction via a cushion rubber (not shown).
  • a conventionally known rubber material is used as the rubber material used for the tread 36.
  • a groove 37 for drainage is formed in the tread 36.
  • the tread 36 has a conventionally known pattern.
  • the width BW (width dimension measured along the tire width direction) of the belt 26 is 75% or more with respect to the contact width TW of the tread 36 measured along the tire width direction. In addition, it is preferable that the width BW of the belt 26 be 110% or less with respect to the contact width TW.
  • the contact width TW of the tread 36 means that the tire 10 is mounted on a standard rim specified in JATMA YEAR BOOK (2018 edition, Japan Automobile Tire Association Standard), and the applicable size and ply rating in JATMA YEAR BOOK 100% internal pressure of the air pressure (maximum air pressure) corresponding to the maximum load capacity (bold load in the internal pressure-load capacity correspondence table), so that the rotation axis is parallel to the horizontal flat plate in the stationary state It is the one when placed and the mass corresponding to the maximum load capacity is added.
  • the TRA standard and the ETRTO standard are applied at the place of use or the place of manufacture, the respective standards are followed.
  • a resin plate 35 is joined to an outer portion in the width direction of the belt 26 (in FIG. 1, illustration of the resin plate 35 is omitted).
  • a total of four resin plates 35 are provided, each of which is provided in an annular shape around the tire rotation axis, similarly to the belt 26. That is, the resin plate 35 is arranged with the tire radial direction as the plate thickness direction.
  • the four resin plates 35 are provided on the outer side in the tire radial direction and the inner side in the tire radial direction on one side in the width direction of the belt 26 (left side in FIG. 2), and on the other side in the width direction of the belt 26 (right side in FIG. 2).
  • the resin plate 35 is joined to the resin 32 portion of the belt 26 by welding.
  • the position of the outer end of the resin plate 35 in the tire width direction substantially coincides with the position of the outer end of the belt 26 in the tire width direction. Therefore, the resin plate 35 has no portion protruding outward in the tire width direction with respect to the belt 26.
  • the structure in which the resin plate 35 does not protrude outward in the tire width direction with respect to the belt 26 is illustrated.
  • the belt 26 may protrude outward in the tire width direction. In this case, the effect of reducing the widthwise rigidity step at the belt end is exhibited.
  • the crown portion of the tire frame member 25 is reinforced by the belt 26 and the resin plate 35.
  • the tire 10 includes the resin reinforcement 31 that reinforces the tire frame member 25, and the resin reinforcement 31 includes the belt 26 and the resin plate 35.
  • the belt 26 is formed by spirally winding the resin-coated cords 34 having the same cross section (rectangular cross section in the present embodiment), so that the thickness dimension of the belt 26 is in the width direction of the belt 26. Is substantially constant irrespective of the position. Therefore, the thickness dimension of the resin reinforcing body 31 is thicker in the portion where the resin plate 35 is joined than in the portion where the resin plate 35 is not joined. That is, it can be said that the resin reinforcing body 31 includes a thin portion where the resin plate 35 is not joined and a pair of thick portions where the resin plate 35 is joined.
  • the width W1 of the resin plate 35 is preferably 12.5 to 25.0% of the width BW of the belt 26.
  • the thickness of the belt 26 and the thickness of the resin plate 35 are the same. Therefore, the thickness of the thick portion is set to be about three times the thickness of the thin portion.
  • the thickness dimension of the belt 26 and the thickness dimension of the resin plate 35 are not limited to substantially the same, and may be appropriately changed according to the required rigidity.
  • the thickness of the thick portion relative to the thickness of the thin portion is preferably 150 to 400%.
  • the resin material constituting the resin plate 35 for example, the same resin material as the resin 32 of the belt 26 can be used. However, the present invention is not limited to this.
  • the resin plate 35 only needs to be able to be welded to the resin 32 of the belt 26. In some cases, a resin material having the same kind of resin material but different in hardness may be used, or a resin material different from the resin 32 may be used. A resin material may be used.
  • an unvulcanized tire frame member 25 (tire case) including an inner liner 22, a bead core 12, a bead filler 18, a carcass ply 14, and a side rubber layer 24 is formed on the outer periphery of a known tire forming drum (not shown). I do.
  • the separately formed resin reinforcing member 31 is arranged radially outside the tire frame member 25 on the tire building drum, and the tire frame member 25 is expanded to expand the outer peripheral surface of the tire frame member 25, in other words, the outer periphery of the carcass 16. The surface is pressed against the inner peripheral surface of the resin reinforcing body 31.
  • an unvulcanized tread 36 is attached to the outer peripheral surface of the belt 26 in the same manner as a general pneumatic tire. Thereby, a raw tire is completed.
  • the green tire is vulcanized and molded in a vulcanization mold in the same manner as a general pneumatic tire. Thereby, the tire 10 is completed.
  • the code supply device 42, the heating device 50, the pressing roller 60, and the cooling roller 70 are movably disposed near the belt forming drum 40.
  • the cord supply device 42 includes a reel 43 around which the resin-coated cord 34 is wound, and a guide member 44 for guiding the resin-coated cord 34 unwound from the reel 43 to the outer periphery of the belt forming drum 40.
  • the guide member 44 has a cylindrical shape, and the resin-coated cord 34 passes through the inside thereof. Further, the resin-coated cord 34 is sent out from the mouth 46 of the guide member 44 toward the outer peripheral surface of the belt forming drum 40.
  • the heating device 50 blows hot air onto the resin-coated cord 34 to heat and melt the blown portion.
  • air heated by a heating wire (not shown) is blown out from the outlet 52 by an airflow generated by a fan (not shown), and the blown hot air is blown against the resin-coated cord 34.
  • the configuration of the heating device 50 is not limited to the above configuration, and may be any configuration as long as the thermoplastic resin can be heated and melted.
  • a hot iron may be brought into contact with the side surface of the resin-coated cord 34 to heat and melt the side surface, may be heated and melted by radiant heat, or may be heated and melted by irradiating infrared rays.
  • the pressing roller 60 is for pressing a resin-coated cord 34 described later against the outer peripheral surface of the belt forming drum 40, and is capable of adjusting the pressing force F. Further, the roller surface of the pressing roller 60 is processed to prevent the resin material in a molten state from adhering.
  • the pressing roller 60 is rotatable. When the resin-coated cord 34 is pressed against the outer periphery of the belt forming drum 40, the pressing roller 60 is driven to rotate in the rotation direction (the direction of the arrow A) of the belt forming drum 40. It has become.
  • the cooling roller 70 is disposed downstream of the pressing roller 60 in the rotation direction of the belt forming drum 40, and cools the resin coating cord 34 while pressing the resin coating cord 34 against the outer peripheral surface of the belt forming drum 40. is there.
  • the cooling roller 70 is capable of adjusting the pressing force, and has been subjected to processing for preventing adhesion of a molten resin material to the roller surface.
  • the cooling roller 70 is rotatable similarly to the pressing roller 60, and when the resin-coated cord 34 is pressed against the outer peripheral surface of the belt forming drum 40, the rotation direction of the belt forming drum 40 (arrow A) Direction).
  • the cooling roller 70 is configured such that a liquid (for example, water) flows through the inside of the roller, and a member (the resin-coated cord 34 in the present embodiment) that comes into contact with the roller surface by heat exchange of the liquid. Can be cooled. When the resin material in the molten state is naturally cooled, the cooling roller 70 may be omitted.
  • a liquid for example, water
  • a member the resin-coated cord 34 in the present embodiment
  • the belt forming drum 40 is rotated in the direction of arrow A, and the resin-coated cord 34 is sent out from the mouth 46 of the cord supply device 42 toward the outer peripheral surface of the belt forming drum 40.
  • the resin-coated cord 34 is attached to the belt forming drum 40 while Is pressed against the outer peripheral surface of the belt forming drum 40 by the pressing roller 60.
  • the resin-coated cord 34 is deformed (deformed by crushing) so that the side portion swells in the tire rotation axis direction by the pressing roller 60, and the side surfaces of the resin 32 adjacent in the tire rotation axis direction come into contact with each other. Weld. Thereafter, the molten portion of the resin 32 contacts the cooling roller 70 and is solidified, and the welding of the adjacent resin-coated cords 34 is completed.
  • the resin-coated cord 34 is spirally wound around the outer peripheral surface of the belt forming drum 40 and pressed against the outer peripheral surface, whereby the belt 26 is formed on the outer peripheral surface of the belt forming drum 40.
  • the belt 26 is formed by spirally winding a resin-coated cord 34 in which two reinforcing cords 30 are covered with a coating resin 32.
  • the four resin plates 35 are joined to the belt 26 by welding.
  • the resin reinforcement 31 is formed (see FIG. 2).
  • the joining method by welding is not particularly limited, but for the resin plate 35 on the outer side in the tire radial direction, after the belt 26 is formed on the belt forming drum 40, the resin plate 35 is welded to the belt 26 before being removed from the belt forming drum 40. Is preferred.
  • a reinforcing body 31 is provided. Thereby, the crown portion of the tire frame member 25 is reinforced.
  • the average thickness of the outer region OR (the region 25% from the outer end in the width direction) is larger than the average thickness of the central region CR (the region other than the outer region OR). It is formed as follows. For this reason, the outer portion of the crown portion in the tire width direction is mainly increased in rigidity, and as a result, the cornering power is improved. Further, compared to a mode in which the overall thickness of the resin reinforcing body 31 in the tire width direction is increased, the rigidity of the central portion in the tire width direction in the crown portion is suppressed, and as a result, the reduction in ride comfort is suppressed. I have.
  • the resin plate 35 is joined to the belt 26 (spiral belt layer) of the resin reinforcing member 31, so that the thickness of the resin reinforcing member 31 outside in the tire width direction is increased. That is, since the resin reinforcing member 31 can be formed by adding the resin plate 35 made of resin to the belt 26, manufacturing is easy.
  • the area W1 of the belt 26 where the resin plate 35 is joined and the thickness dimension is increased when the entire belt width direction of the belt 26 in the tire width direction is 100%, the area W1 is 12.
  • the region is 5 to 25.0%.
  • the resin reinforcement 31 is formed such that the average thickness of the outer region OR is 1.5 times (more preferably, 2 times or more) the average thickness of the central region CR. That is, since the ratio of the average thickness dimension of the outer region OR and the central region CR of the resin reinforcing body 31 is set to a certain value or more, a significant effect can be obtained.
  • the tensile elasticity of the resin 32 covering the reinforcing cord 30 is set to 50 MPa or more and the thickness is set to 0.7 mm or more, the in-plane shear rigidity of the belt 26 in the tire width direction is sufficiently ensured. be able to.
  • width BW of the belt 26 is set to 75% or more of the contact width TW of the tread 36, the rigidity near the shoulder 39 can be increased.
  • the resin-coated cord 34 used in manufacturing the belt 26 was formed by coating two reinforcing cords 30 with the resin 32.
  • the resin-coated cord 34 is one reinforcing cord 30. May be coated with the resin 32, or three or more reinforcing cords 30 may be coated with the resin 32.
  • the tire of the second embodiment is different from the first embodiment in the configuration of the resin reinforcing body 31. Since the configuration other than the resin reinforcement 31 is substantially the same, a description will be given with reference to FIG. Hereinafter, a method of manufacturing the resin reinforcement 31 of the second embodiment will be described, and the structure thereof will be described.
  • a belt 26T shown in FIG. 4A is formed by spirally winding a resin-coated cord 34 in which two reinforcing cords 30 are covered with a resin 32 for covering.
  • the resin-coated cord 34 of the second embodiment is formed to have a larger vertical dimension (a direction that coincides with the tire radial direction when the tire is completed) than the resin-coated cord 34 of the first embodiment, and has a substantially square cross section. It has been.
  • the outer peripheral surface (outer surface in the tire radial direction) and the inner peripheral surface of the belt 26T are cut to reduce the thickness dimension of the belt 26 at the central portion in the width direction.
  • the belt 26 shown in FIG. 4B is formed.
  • the belt 26 is formed such that the average thickness of the outer region OR is twice or more the average thickness of the center region CR.
  • the belt 26 corresponds to the “resin reinforcement” of the present disclosure. That is, the resin reinforcing body 31 does not include the resin plate 35 but includes only the belt 26 (spiral belt layer, a resin-coated cord 34 spirally wound).
  • the average thickness of the outer region OR (the region 25% from the outer end in the width direction) is larger than the average thickness of the central region CR (the region other than the outer region OR). Is also formed to be large. For this reason, the outer portion of the crown portion in the tire width direction is mainly increased in rigidity, and as a result, the cornering power is improved. In addition, compared to a mode in which the entire thickness of the resin reinforcement body 31 in the tire width direction is increased, the rigidity of the central portion in the tire width direction in the crown portion is suppressed, and as a result, the reduction in ride comfort is suppressed. I have.
  • the tire of the third embodiment is different from the first and second embodiments in the configuration of the resin reinforcing body 31. Since the configuration other than the resin reinforcement 31 is substantially the same, only the resin reinforcement 31 of the third embodiment will be described with reference to FIG.
  • the resin reinforcement 31 is formed by integral formation by injection molding. Therefore, the shape and size of the resin reinforcing body 31 can be determined by the shape and size of the mold used for injection molding.
  • the resin reinforcing body 31 is formed such that the thickness dimension gradually decreases from the outer side in the width direction to the center side in the width direction. Therefore, the resin reinforcement 31 cannot be clearly divided into a portion having a large thickness and a portion having a small thickness.
  • the resin reinforcing body 31 may be formed so that a thick portion (thick portion) and a small portion (thin portion) can be clearly distinguished. .
  • the thick portion be a region of 12.5 to 25.0% from the widthwise outer end of the resin reinforcement 31.
  • the average thickness of the outer region OR (the region 25% from the outer end in the width direction) is larger than the average thickness of the central region CR (the region other than the outer region OR). Is also formed to be large. For this reason, the outer portion of the crown portion in the tire width direction is mainly increased in rigidity, and as a result, cornering power is improved. In addition, compared to a mode in which the overall thickness of the resin reinforcement body 31 in the tire width direction is increased, the rigidity of the central portion in the tire width direction in the crown portion is suppressed, and as a result, the reduction in ride comfort is suppressed. I have.
  • the resin reinforcement 31 is integrally formed, unlike the resin reinforcement 31 of the first or second embodiment, there is no bonding interface existing between the resin-coated cords 34. Therefore, there is no fear of cracking based on the bonding interface of the resin reinforcement 31.
  • the belt 26 has a shape extending linearly in the tire width direction when viewed in a cross section passing through the tire rotation axis.
  • the shape of the belt 26 may be such that the central portion in the tire width direction is convex outward in the tire radial direction when viewed in a cross section passing through the tire rotation axis.
  • the tire 10 is a general pneumatic tire
  • a run-flat tire in which side portions are reinforced with reinforcing rubber may be used.

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

Abstract

L'invention concerne un pneu équipé : d'un organe squelette de pneu formé par inclusion d'une carcasse ; d'une bande de roulement composée d'un matériau de caoutchouc ; d'un corps de renfort en résine qui est disposé entre l'organe squelette de pneu et la bande de roulement, et composé d'un matériau de résine, et dans lequel un câble de renfort enroulé dans la direction circonférentielle du pneu est incorporé. Dans le corps de renfort en résine, des régions externes, lesquelles constituent une région à 25 % depuis l'extrémité externe correspondante dans la direction de la largeur du pneu, ont une dimension d'épaisseur moyenne qui est plus importante que la dimension d'épaisseur moyenne d'une région centrale qui est la région restante.
PCT/JP2019/023638 2018-06-18 2019-06-14 Pneu WO2019244788A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018115207A JP2019217843A (ja) 2018-06-18 2018-06-18 タイヤ
JP2018-115207 2018-06-18

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WO2019244788A1 true WO2019244788A1 (fr) 2019-12-26

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Citations (14)

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Publication number Priority date Publication date Assignee Title
JPS61119407A (ja) * 1984-11-15 1986-06-06 Bridgestone Corp 空気入りタイヤ
JPH01229704A (ja) * 1988-03-10 1989-09-13 Bridgestone Corp 空気入りラジアルタイヤ
JPH02234807A (ja) * 1989-03-08 1990-09-18 Bridgestone Corp 空気入りラジアルタイヤ
JPH0439104A (ja) * 1990-06-01 1992-02-10 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JPH071914A (ja) * 1993-06-14 1995-01-06 Toyo Tire & Rubber Co Ltd 空気入りラジアルタイヤ
JPH1199806A (ja) * 1997-09-30 1999-04-13 Yokohama Rubber Co Ltd:The 空気入りラジアルタイヤ
JP2006315516A (ja) * 2005-05-12 2006-11-24 Bridgestone Corp 空気入りタイヤ
JP2007069745A (ja) * 2005-09-07 2007-03-22 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2014210487A (ja) * 2013-04-18 2014-11-13 株式会社ブリヂストン タイヤ及びタイヤの製造方法
WO2016017556A1 (fr) * 2014-07-30 2016-02-04 株式会社ブリヂストン Pneu
WO2017099127A1 (fr) * 2015-12-07 2017-06-15 株式会社ブリヂストン Pneumatique
WO2017203765A1 (fr) * 2016-05-26 2017-11-30 株式会社ブリヂストン Pneumatique
WO2018074196A1 (fr) * 2016-10-18 2018-04-26 株式会社ブリヂストン Pneu
WO2018101175A1 (fr) * 2016-12-02 2018-06-07 株式会社ブリヂストン Pneumatique

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61119407A (ja) * 1984-11-15 1986-06-06 Bridgestone Corp 空気入りタイヤ
JPH01229704A (ja) * 1988-03-10 1989-09-13 Bridgestone Corp 空気入りラジアルタイヤ
JPH02234807A (ja) * 1989-03-08 1990-09-18 Bridgestone Corp 空気入りラジアルタイヤ
JPH0439104A (ja) * 1990-06-01 1992-02-10 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JPH071914A (ja) * 1993-06-14 1995-01-06 Toyo Tire & Rubber Co Ltd 空気入りラジアルタイヤ
JPH1199806A (ja) * 1997-09-30 1999-04-13 Yokohama Rubber Co Ltd:The 空気入りラジアルタイヤ
JP2006315516A (ja) * 2005-05-12 2006-11-24 Bridgestone Corp 空気入りタイヤ
JP2007069745A (ja) * 2005-09-07 2007-03-22 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2014210487A (ja) * 2013-04-18 2014-11-13 株式会社ブリヂストン タイヤ及びタイヤの製造方法
WO2016017556A1 (fr) * 2014-07-30 2016-02-04 株式会社ブリヂストン Pneu
WO2017099127A1 (fr) * 2015-12-07 2017-06-15 株式会社ブリヂストン Pneumatique
WO2017203765A1 (fr) * 2016-05-26 2017-11-30 株式会社ブリヂストン Pneumatique
WO2018074196A1 (fr) * 2016-10-18 2018-04-26 株式会社ブリヂストン Pneu
WO2018101175A1 (fr) * 2016-12-02 2018-06-07 株式会社ブリヂストン Pneumatique

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