WO2019244776A1 - Bandage pneumatique - Google Patents

Bandage pneumatique Download PDF

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Publication number
WO2019244776A1
WO2019244776A1 PCT/JP2019/023525 JP2019023525W WO2019244776A1 WO 2019244776 A1 WO2019244776 A1 WO 2019244776A1 JP 2019023525 W JP2019023525 W JP 2019023525W WO 2019244776 A1 WO2019244776 A1 WO 2019244776A1
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WO
WIPO (PCT)
Prior art keywords
belt
resin
tire
width direction
tire width
Prior art date
Application number
PCT/JP2019/023525
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English (en)
Japanese (ja)
Inventor
好秀 河野
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 WO2019244776A1 publication Critical patent/WO2019244776A1/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
    • 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 provided with a belt including a cord wound in a spiral shape.
  • the tire is inclined outward in the tire radial direction of the carcass with respect to the tire circumferential direction.
  • a structure including a belt composed of two or more inclined belt plies including a cord and a plurality of layers including a reinforcing layer and the like disposed outside the inclined belt plies in the tire radial direction is generally used.
  • Japanese Patent Application Laid-Open No. 2018-0665426 discloses a tire having a belt formed by spirally winding a resin-coated cord formed by coating a reinforcing cord with a resin in the tire circumferential direction on the outer periphery of a tire frame member. Is disclosed.
  • the pneumatic tires disclosed in JP-A-2013-244930 and JP-A-2013-220743 are provided with two or more inclined belt plies and a reinforcing layer, and thus are necessary for reinforcing the carcass crown. Although it is possible to secure in-plane shear rigidity and the like, it is difficult to reduce the weight of the tire due to the large number of plies and reinforcing layers.
  • the present disclosure aims to provide a pneumatic tire that can ensure the durability of a belt when a belt is formed by covering a reinforcing cord with a resin.
  • the pneumatic tire of the present disclosure is configured to include a carcass straddling from one bead portion to the other bead portion, at least a tire case in which an outer portion in the tire width direction of the carcass is covered with a rubber material, and a tire circumferential direction. And a belt joined to the outer peripheral side of the tire case, wherein the reinforcing cord is wound around the belt, and is joined to an outer peripheral side of the tire case. Are greater at the end in the tire width direction than at the center in the tire width direction.
  • the pneumatic tire belt according to the present disclosure includes a reinforcing cord covered with a resin.
  • the number of reinforcing cords per unit width in the cross section in the tire width direction of the belt is larger at the end portion in the tire width direction where the tension in the tire circumferential direction acting on the belt is larger, so that the tension borne by one reinforcing cord is equalized. can do. Thereby, the durability of the belt including the reinforcing cord can be secured.
  • the durability of the belt when forming a belt by covering a reinforcing cord with a resin, the durability of the belt can be ensured.
  • FIG. 1 is a cross-sectional view along a tire rotation axis showing a pneumatic tire according to a first embodiment. It is an expanded sectional view showing the neighborhood of the shoulder of the pneumatic tire concerning a 1st embodiment. It is a sectional view of a belt of a pneumatic tire concerning a 1st embodiment. It is a sectional perspective view showing a process of winding a resin coating cord on a belt forming drum.
  • FIG. 7 is a cross-sectional view (a cross-sectional view taken along line 5-5 in FIG. 6) of the belt of the pneumatic tire according to the second embodiment. It is a top view of a belt of a pneumatic tire concerning a 2nd embodiment.
  • the pneumatic tire 10 of the present embodiment is, for example, a so-called radial tire used for a passenger car, includes a pair of bead portions 20 in which a bead core 12 is embedded, and one bead portion 20 and the other bead portion.
  • a carcass 16 composed of one carcass ply 14 straddles the bead portion 20.
  • FIG. 1 shows the shape of the pneumatic tire 10 in a natural state before air filling.
  • the carcass 16 is an example of a tire case.
  • 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 a coating rubber (not shown). That is, the pneumatic 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 in the tire width direction has the bead core 12 folded back in the tire radial direction.
  • a portion extending from one bead core 12 to the other bead core 12 is referred to as a main body portion 14A, and a portion folded from the bead core 12 is referred to as 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.
  • a portion of the bead filler 18 from the tire radial outer end 18 ⁇ / b> A to the tire radial direction inside is a bead portion 20.
  • An inner liner 22 made of rubber is arranged inside the tire of the carcass 16, and a side rubber layer 24 made of the first rubber material is arranged outside the carcass 16 in the tire width direction.
  • the tire case 25 is constituted by the bead core 12, the carcass 16, the bead filler 18, the inner liner 22, and the side rubber layer 24.
  • the tire case 25 is, in other words, a tire frame member that forms the frame of the pneumatic tire 10.
  • a belt 26 is arranged outside the crown portion of the carcass 16, in other words, outside the carcass 16 in the tire radial direction, and the belt 26 is in close contact with the outer peripheral surface of the carcass 16.
  • the belt 26 is formed by winding a resin-coated cord 34 in which a plurality of reinforcing cords 30 are covered with a resin 32 in the tire circumferential direction. The method of manufacturing the belt 26 will be described later.
  • the number of the reinforcing cords 30 that are covered with the resin 32 is set such that the belt 26 is larger at the end in the tire width direction than at the center in the tire width direction.
  • the end of the belt 26 in the tire width direction refers to a predetermined range from the end of the belt 26 in the tire width direction, and is preferably a region of 15 to 30% of the width BW of the belt 26.
  • the central portion of the belt 26 in the tire width direction refers to a predetermined range around the tire equatorial plane CL, and is preferably 40 to 70% of the width BW of the belt 26 sandwiched between the end portions in the tire width direction. Area.
  • the width BW of the belt 26 refers to a range from one tire width direction end of the belt 26 to the other tire width direction end.
  • the resin-coated cords 34 at the end portions of the belt 26 in the tire width direction each have three reinforcements.
  • the cords 30 are covered with the resin 32, and the resin-coated cords 34 at the center portion of the belt 26 in the tire width direction (the sixth and subsequent cords from both ends in the tire width direction) are each formed of two reinforcing cords 30 with the resin 32.
  • the range in which the number of the reinforcing cords 30 to be covered is larger than the central portion in the tire width direction is a range of 1/4 of the width BW of the belt 26 from the end in the tire width direction of the belt 26.
  • the groove 37 be described below and be in a range outside the groove 37 at the end in the tire width direction.
  • 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 100 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 700 MPa.
  • the thickness t of the belt 26 of the present embodiment is larger than the diameter of the reinforcing cord 30. In other words, it is preferable that the reinforcing cord 30 is completely embedded in the resin 32.
  • the thickness t of the belt 26 is preferably set to 0.70 mm or more.
  • a tread 36 made of a second rubber material is disposed outside the belt 26 in the tire radial direction.
  • a generally known material is used as the second 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 of the belt 26 measured along the tire width direction is 75% or more with respect to the contact width TW of the tread 36 measured along the tire width direction.
  • the upper limit of the width BW of the belt 26 be 110% with respect to the contact width TW.
  • the contact width TW of the tread 36 means that the pneumatic tire 10 is mounted on a standard rim stipulated in JATMA YEAR BOOK (2018 edition, Japan Automobile Tire Association Standard) and the applicable size in JATMA YEAR BOOK. Fills with 100% internal pressure of the air pressure (maximum air pressure) corresponding to the maximum load capacity (the bold load in the internal pressure-load capacity correspondence table) in the ply rating, and the rotation axis is parallel to the horizontal flat plate in a stationary state And a 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.
  • the in-plane shear rigidity of the belt 26 is preferably equal to or greater than that of the belt formed by rubber coating.
  • an inner liner 22 made of a rubber material, a bead core 12, a bead filler 18 made of a rubber material, a carcass ply 14 having a cord covered with a rubber material, and a side rubber layer 24 are provided on the outer periphery of a known tire forming drum (not shown).
  • An unvulcanized tire case 25 is formed.
  • the manufacturing method up to here is the same as the conventional one.
  • the resin-coated cord 34 (shown by a two-dot chain line in FIGS. 2 and 3) is formed by covering two or three reinforcing cords 30 with the resin 32 for covering.
  • the resin-coated cord 34 first, the three reinforcing cords 30 are covered with the resin 32 to a length wound by 1 / of the width BW of the belt 26. Then, the reinforcing cord 30 at the center in the width direction among the three is cut, and the two reinforcing cords 30 are covered with the resin 32 until the reinforcing cord 30 reaches a length wound by ⁇ of the width BW of the belt 26. After one reinforcing cord 30 is inserted again between the two reinforcing cords 30, the three reinforcing cords 30 reach a length wound by 1 / of the width BW of the belt 26. Up to the resin 32.
  • the cross-sectional shape of the resin-coated cord 34 is a rectangle (a rectangle that is long in the tire width direction).
  • the belt 26 is formed by spirally winding a resin-coated cord 34.
  • the cord 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 guides the reel 43 around which the resin-coated cord 34 in which the reinforcing cord 30 is coated with the coating resin 32 and the resin-coated cord 34 unwound from the reel 43 to the outer periphery of the belt forming drum 40.
  • a guide member 44 for performing the operation 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 width direction by the pressing roller 60, and the side surfaces of the resin 32 adjacent to each other in the tire width direction come into contact with each other and weld. .
  • 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 position of the mouth 46 of the cord supply device 42 is moved in the tire width direction with the rotation of the tire case 17, or the tire case 17 is moved in the tire width direction. You can move it.
  • the belt 26 in which the resin 32 has been solidified is removed from the belt forming drum 40, and disposed outside the tire case of the tire forming drum in the radial direction, and the tire case is expanded to expand the outer peripheral surface of the tire case, in other words, the outer periphery of the carcass 16. The surface is pressed against the inner peripheral surface of the belt 26.
  • an unvulcanized tread 36 is attached to the outer peripheral surface of the belt 26 in the same manner as a general pneumatic tire, and a green tire is completed.
  • the green tire thus manufactured is vulcanized and molded by a vulcanization mold in the same manner as a general pneumatic tire, and the pneumatic tire 10 is completed.
  • the crown portion of the carcass 16 is reinforced by the belt 26 covered with the resin 32 on the reinforcing cord 30 wound in a spiral shape. Compared to a belt composed of a plurality of layers composed of a belt ply, it is lighter in weight and easier to manufacture.
  • the tensile modulus of the resin 32 covering the reinforcing cord 30 is set to 50 MPa or more and the thickness is secured to 0.7 mm or more, so that the in-plane shearing of the belt 26 in the tire width direction is performed.
  • the rigidity can be sufficiently secured.
  • the belt 26 having a high in-plane shear rigidity is used, and the width BW of the belt 26 is set to be 75% or more of the contact width TW of the tread 36, so that the rigidity near the shoulder 39 is obtained. Can be increased.
  • the belt 26 since the belt 26 has a one-layer structure, the thickness of the belt 26 can be reduced as compared with a conventional case where two or more belt plies are used, and the tread 36 The thickness can be increased, and the depth of the groove 37 can be increased. As a result, the life of the pneumatic tire 10 can be extended.
  • the reinforcing cord 30 is spirally wound, and there is no portion where the reinforcing cord 30 overlaps in the tire radial direction on the circumference, and the thickness is uniform in the tire circumferential direction.
  • the pneumatic tire 10 is excellent in uniformity.
  • the belt is formed so as to have a slightly smaller diameter at the end side in the tire width direction than at the center side in the tire width direction according to the shape of the tire case. Therefore, when the pneumatic tire rolls, the belt receives the force in the tire expanding direction at the end in the tire width direction, that is, the tension in the tire circumferential direction, and the tire contracts at the center in the tire width direction.
  • Directional force that is, a compressive force in the tire circumferential direction.
  • the tension in the tire circumferential direction acting on the belt is the same as in a conventional inclined belt ply. Cannot be supported by multiple codes skewed. Therefore, in the resin belt, the tension in the tire circumferential direction has a structure in which the reinforcing cords extending in the tire circumferential direction are independently supported. On the other hand, the tension in the tire circumferential direction acting on the belt increases toward the end in the tire width direction, so that the tension borne by one reinforcing cord increases toward the end in the tire width direction. Therefore, in the case where the conventional belt is simply replaced with a resin belt in the pneumatic tire, the load on the reinforcing cord at the end portion in the tire width direction becomes large, so that it is difficult to improve the durability.
  • the number of the reinforcing cords 30 covered with the resin 32 in the resin-coated cords 34 is greater at the end in the tire width direction than at the center in the tire width direction. It is set as follows. That is, in the belt 26 of the present embodiment, the number of the reinforcing cords 30 per unit width in the tire width direction cross section is larger at the tire width direction end side where the tension is larger, so that the tension borne by one reinforcing cord 30 is smaller. Can be equalized. Thereby, the durability of the belt 26 including the reinforcing cord 30 can be ensured.
  • the belt 26 of the present embodiment is configured by winding a resin-coated cord 34 in which a plurality of reinforcing cords 30 are covered with a resin 32, and changes the number of the reinforcing cords 30 arranged on the resin-coated cord 34. By doing so, the number of reinforcing cords 30 per unit width is changed. Therefore, the number of reinforcing cords 30 at the end portion in the tire width direction can be increased without changing the winding method of the resin-coated cord 34, and the durability of the belt 26 can be improved without increasing the number of man-hours for manufacturing the belt 26. Can be secured.
  • the number of the reinforcing cords 30 is increased in a range of 1/4 of the width BW of the belt 26 from the end in the tire width direction. This range is a range outside the groove 37 at the end in the tire width direction among the grooves 37. According to the present embodiment, by increasing the number of the reinforcing cords 30 outside the groove 37, the tension load near the shoulder 39 can be reduced.
  • the belt 26 of the present embodiment is formed by winding a resin-coated cord 34 in which one reinforcing cord 30 is covered with a resin 32 in the tire circumferential direction.
  • the number of reinforcing cords 30 per unit width is changed by changing the feed speed in the tire width direction when winding the resin-coated cords 34, in other words, by changing the interval between adjacent resin-coated cords 34.
  • the resin forming the filling portion 33 be the same material as the resin 32 forming the resin-coated cord 34.
  • the range in which the interval between the adjacent resin-coated cords 34 is narrower than the central portion in the tire width direction is preferably set to a range of 1 / of the width BW of the belt 26 from the end in the tire width direction.
  • the belt 26 can be formed without increasing the man-hour for manufacturing the resin-coated cords 34. Durability can be ensured.
  • the belt 26 is formed by winding the resin-coated cord 34.
  • the present invention is not limited to this, and the belt 26 may be formed of a single cylindrical body made of resin.
  • the reinforcing cord 30 is wound around the outer periphery of a resin ring formed in a cylindrical shape in advance so that the number of end portions in the tire width direction is larger than that in the central portion in the tire width direction. Is further covered with a resin 32.
  • the resin-made cylindrical ring can be formed by cutting a resin cylinder formed by injection molding or extrusion molding into a predetermined length.
  • the belt 26 composed of one cylindrical body as described above also has the same function and effect as the first embodiment.
  • the belt may be divided in the width direction due to poor welding, but the belt 26 has an interface in the tire width direction. Therefore, there is no fear that the belt 26 is separated in the tire width direction due to poor welding, and the durability can be improved. Further, as compared with the case where the belt is formed by welding the resin-coated cord, the number of steps is reduced, so that the productivity is improved and the cost can be reduced.
  • the resin-coated cord 34 used when manufacturing the belt 26 is formed by covering two or three reinforcing cords 30 with the resin 32, but the present invention is not limited to this. That is, if the number of reinforcing cords 30 per unit width in the cross section of the belt 26 in the tire width direction is larger at the end in the tire width direction than at the center in the tire width direction, three or more reinforcing cords 30 are covered. There may be.
  • the cross section of the resin-coated cord 34 of the above embodiment is rectangular, and as shown in FIG. 2, an inner peripheral surface 34A on the carcass 16 side (lower side in the drawing) and an outer peripheral surface 34B on the tread 36 side (upper side in the drawing).
  • the cross section of the resin-coated cord 34 is not limited to a rectangle, and the inner peripheral surface 34A on the carcass side (the lower side in the drawing) and the outer peripheral surface on the tread side (the upper side in the drawing).
  • 34B may be displaced in the belt width direction.
  • the resin-coated cord 34 may have a parallelogram cross section.
  • the belt 26 of the present embodiment is not limited to a general pneumatic tire, and may be used for a run flat tire whose side portions are reinforced with reinforcing rubber.
  • the side surfaces in the tire width direction of the resin-coated cords 34 adjacent in the belt width direction are joined by welding, but may be joined by using an adhesive.

Abstract

L'invention concerne un bandage pneumatique équipé d'une enveloppe de pneu qui est conçue pour comprendre une carcasse s'étendant d'une partie talon à une autre partie talon, et dans laquelle au moins une partie extérieure, dans la direction de la largeur du pneu, de la carcasse est recouverte d'un matériau de caoutchouc, et une ceinture qui est conçue par revêtement de câbles de renfort, enroulés dans la direction circonférentielle du pneu, avec de la résine, et qui est reliée à un côté circonférentiel externe de la carcasse. Dans une section transversale traversant la ceinture dans la direction de la largeur du pneu, le nombre de câbles de renfort par largeur unitaire de la ceinture est supérieur dans des parties extrémités dans la direction de la largeur du pneu que dans une partie centrale dans la direction de la largeur du pneu.
PCT/JP2019/023525 2018-06-21 2019-06-13 Bandage pneumatique WO2019244776A1 (fr)

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JP2018117979A JP2019217957A (ja) 2018-06-21 2018-06-21 空気入りタイヤ
JP2018-117979 2018-06-21

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03157204A (ja) * 1989-11-14 1991-07-05 Bridgestone Corp 空気入りラジアルタイヤ
JP2005125815A (ja) * 2003-10-21 2005-05-19 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
JP2012035500A (ja) * 2010-08-06 2012-02-23 Bridgestone Corp タイヤの製造方法及びタイヤ
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
JP2016097945A (ja) * 2014-11-26 2016-05-30 株式会社ブリヂストン タイヤ
WO2017099127A1 (fr) * 2015-12-07 2017-06-15 株式会社ブリヂストン Pneumatique
JP2017206210A (ja) * 2016-05-20 2017-11-24 株式会社ブリヂストン タイヤ
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 (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03157204A (ja) * 1989-11-14 1991-07-05 Bridgestone Corp 空気入りラジアルタイヤ
JP2005125815A (ja) * 2003-10-21 2005-05-19 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
JP2012035500A (ja) * 2010-08-06 2012-02-23 Bridgestone Corp タイヤの製造方法及びタイヤ
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
JP2016097945A (ja) * 2014-11-26 2016-05-30 株式会社ブリヂストン タイヤ
WO2017099127A1 (fr) * 2015-12-07 2017-06-15 株式会社ブリヂストン Pneumatique
JP2017206210A (ja) * 2016-05-20 2017-11-24 株式会社ブリヂストン タイヤ
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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