WO2019239941A1 - Pneumatique - Google Patents

Pneumatique Download PDF

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Publication number
WO2019239941A1
WO2019239941A1 PCT/JP2019/021997 JP2019021997W WO2019239941A1 WO 2019239941 A1 WO2019239941 A1 WO 2019239941A1 JP 2019021997 W JP2019021997 W JP 2019021997W WO 2019239941 A1 WO2019239941 A1 WO 2019239941A1
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WO
WIPO (PCT)
Prior art keywords
resin
tire
cord
protective member
coated cord
Prior art date
Application number
PCT/JP2019/021997
Other languages
English (en)
Japanese (ja)
Inventor
圭一 長谷川
崇之 藏田
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 WO2019239941A1 publication Critical patent/WO2019239941A1/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
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/04—Bead cores
    • 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
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics

Definitions

  • This disclosure relates to a pneumatic tire.
  • JP 2012-523340 A discloses a tire in which a circumferential belt is formed of a stainless steel cord or the like parallel to the tire circumferential direction.
  • Japanese Unexamined Patent Application Publication No. 2014-210487 discloses a tire in which a reinforcing cord member is spirally wound around a crown portion of a resin tire frame member.
  • This disclosure protects the tip of the cord in a resin-coated cord wound spirally.
  • the pneumatic tire according to the first aspect includes a carcass formed across a pair of bead cores and a resin-coated cord formed by covering the cord with a resin and disposed on the outer side in the tire radial direction of the carcass in the tire circumferential direction.
  • a resin belt layer formed by being wound in a spiral shape; and a resin protective member fused to the distal end surface of the resin-coated cord and extending along the tire circumferential direction.
  • a resin belt layer is formed by spirally winding a resin-coated cord formed by coating a cord with a resin in the tire circumferential direction.
  • a resin protective member is fused to the front end surface of the resin-coated cord. For this reason, the tip of the cord is protected.
  • the “tip surface” of the resin-coated cord is a surface where the tip of the cord is exposed.
  • the protective member has a shape in which the tire radial direction dimension gradually decreases toward the tip in the tire circumferential direction.
  • the tire radial dimension at the tip of the protection member gradually decreases toward the tire circumferential tip, so that the rigidity of the protection member gradually decreases toward the tire circumferential tip. For this reason, the rigidity level difference of the tire peripheral direction in the front-end
  • the resin-coated cord has a shape in which the tire radial dimension at the tip gradually decreases toward the tip in the tire circumferential direction.
  • the rigidity of the resin-coated cord gradually decreases toward the tire circumferential tip. For this reason, the rigidity level difference of the tire peripheral direction in the front-end
  • chamfering is formed at the end of the resin belt layer in the tire width direction of the resin belt layer and the end of the protective member in the tire width direction.
  • the rigidity step in the tire width direction can be reduced.
  • a pneumatic tire according to a fifth aspect includes a bead core formed by spirally winding a resin-coated cord formed by coating a cord with a resin in a tire circumferential direction, and a carcass formed across a pair of the bead cores And a belt layer disposed on the outer side in the tire radial direction of the carcass, and a resin protective member fused to the front end surface of the resin-coated cord and extending along the tire circumferential direction.
  • a bead core is formed by spirally winding a resin-coated cord formed by coating a cord with a resin in the tire circumferential direction.
  • a resin protective member is fused to the front end surface of the resin-coated cord. For this reason, the tip of the cord is protected.
  • the pneumatic tire according to the present disclosure can protect the tip of the cord in the coated cord wound in a spiral.
  • 1 is a half cross-sectional view illustrating a pneumatic tire according to a first embodiment of the present disclosure. It is the perspective view which showed an example of the resin belt layer in the pneumatic tire which concerns on 1st Embodiment of this indication. It is sectional drawing of the resin belt layer in the pneumatic tire which concerns on 1st Embodiment of this indication. It is sectional drawing which shows the modification which coat
  • FIG. 19A It is a top view showing the modification which formed chamfering in the protection member made into the shape where the resin covering cord and the tire radial direction size in the pneumatic tire concerning a 1st embodiment of this indication decrease gradually.
  • FIG. 19B It is the side view which looked at the protection member made into the shape where the resin-coated code
  • FIG. 19B is a sectional view taken along line DD in FIG. 19A.
  • FIG. 5 is a side view showing a modified example in which a bead core is formed of a resin-coated cord in a pneumatic tire according to an embodiment of the present disclosure, and a protective member is fused to a front end surface. It is sectional drawing of the bead core which formed with the resin coating cord and fuse
  • FIG. 1 shows a cut surface (that is, along the tire circumferential direction) cut along the tire width direction and the tire radial direction of the pneumatic tire (hereinafter referred to as “tire 10”) according to the first embodiment of the present disclosure.
  • tire 10 the tire radial direction of the pneumatic tire
  • An arrow W indicates the width direction of the tire 10 (tire width direction)
  • an arrow R indicates the radial direction of the tire 10 (tire radial direction).
  • the tire width direction here refers to a direction parallel to the rotation axis of the tire 10.
  • the tire radial direction refers to a direction orthogonal to the rotation axis of the tire 10.
  • Reference sign CL indicates the equator plane of the tire 10 (tire equator plane).
  • FIG. 1 shows the shape of the pneumatic tire 10 in a natural state before air filling.
  • the side closer to the rotation axis of the tire 10 along the tire radial direction is “inner side in the tire radial direction”, and the side farther from the rotation axis of the tire 10 along the tire radial direction is “outer side in the tire radial direction”. It describes.
  • the side close to the tire equator plane CL along the tire width direction is described as “inner side in the tire width direction”, and the side far from the tire equator plane CL along the tire width direction is described as “outer side in the tire width direction”.
  • the tire 10 includes a pair of bead portions 12, a carcass 16 straddling a bead core 12 ⁇ / b> A embedded in each bead portion 12, and an end portion locked to the bead core 12 ⁇ / b> A, and a bead portion 12.
  • a bead filler 12B that is buried and extends along the outer surface of the carcass 16 from the bead core 12A to the outer side in the tire radial direction, a resin belt layer 40 provided on the outer side in the tire radial direction of the carcass ply 14; And a tread 60 provided on the head.
  • the tire 10 is provided with a resin protective member 70 (see FIG. 4) fused to the distal end surface of a resin-coated cord 42 described later in the resin belt layer 40.
  • bead cores 12A as wire bundles are respectively embedded.
  • a carcass ply 14 straddles these bead cores 12A.
  • the bead core 12A can employ various structures such as a circular cross section and a polygonal cross section. Further, for example, a hexagon can be adopted as the polygon, but in the present embodiment, it is a quadrangle.
  • a bead filler 12B is embedded in a region surrounded by the carcass ply 14 locked to the bead core 12A in the bead portion 12.
  • the bead filler 12B extends from the bead core 12A to the outer side in the tire radial direction, and the thickness gradually decreases toward the outer side in the tire radial direction.
  • a bead portion 20 is a portion on the inner side in the tire radial direction from the tire radial direction outer end 12BE of the bead filler 12B.
  • the carcass 16 is formed by a single carcass ply 14 formed by coating a plurality of cords with a covering rubber.
  • the carcass ply 14 extends in a toroidal shape from one bead core 12A to the other bead core 12A to constitute a tire skeleton. Further, the end portion side of the carcass ply 14 is locked to the bead core 12A.
  • the carcass ply 14 includes a main body portion 14A that extends from one bead core 12A to the other bead core 12A, and a folded portion 14B that is folded outward from the bead core 12A in the tire radial direction.
  • the carcass ply 14 is a radial carcass.
  • the material of the carcass ply 14 is not particularly limited, and rayon, nylon, polyethylene naphthalate (PEN), polyethylene terephthalate (PET), aramid, glass fiber, carbon fiber, steel, or the like can be used. From the viewpoint of weight reduction, an organic fiber cord is preferable.
  • the number of carcass shots is in the range of 20 to 60 pieces / 50 mm, but is not limited to this range.
  • the carcass 16 is formed by the single carcass ply 14, but the carcass 16 may be formed by a plurality of carcass plies.
  • An inner liner 22 made of rubber is arranged inside the tire of the carcass 16, and a side rubber layer 24 made of rubber is arranged outside the carcass 16 in the tire width direction.
  • a tire case 25 is configured by the bead core 12A, the carcass 16, the bead filler 12B, the inner liner 22, and the side rubber layer 24.
  • the tire case 25 is a tire frame member that forms the frame of the pneumatic tire 10.
  • a resin belt layer 40 is disposed outside the crown portion of the carcass 16, in other words, outside the carcass 16 in the tire radial direction.
  • the resin belt layer 40 has a ring-shaped ridge formed by winding one resin-coated cord 42 spirally around the outer circumferential surface of the carcass 16 in the tire circumferential direction.
  • the front end surfaces 42E1 and 42E2 in the circumferential direction of the resin-coated cord 42 are surfaces along the tire width direction and the radial direction, and are arranged at different positions in the tire circumferential direction. Note that “spiral” indicates a state in which one resin-coated cord 42 is wound at least one turn around the carcass 16.
  • the resin-coated cord 42 is configured by coating one reinforcing cord 42C with a coating resin 42S, and has a substantially square cross section as shown in FIG. 3A.
  • the coating resin 42S is closely bonded to the outer peripheral surface of the carcass 16 by an adhesive or vulcanization adhesion.
  • the coating resins 42S adjacent to each other in the tire width direction are joined by fusion bonding. Thereby, the resin belt layer 40 in which the reinforcing cord 42C is covered with the covering resin 42S is formed.
  • the reinforcing cord 42C in the resin belt layer 40 of the present embodiment is a steel cord whose outer peripheral surface is plated with cobalt.
  • the steel cord is mainly composed of steel and can contain various trace contents such as carbon, manganese, silicon, phosphorus, sulfur, copper, and chromium.
  • the plating material is not limited to cobalt, and nickel or the like can be used.
  • the end surface of the reinforcing cord 42C is not plated, and the solid steel is exposed.
  • the width BW of the resin belt layer 40 measured along the tire axial direction is preferably 75% or more with respect to the contact width TW of the tread 60 measured along the tire axial direction. Thereby, the rigidity in the vicinity of the shoulder 39 can be increased.
  • the upper limit of the width BW of the resin belt layer 40 is preferably 110% with respect to the ground contact width TW. Thereby, the weight increase of the tire 10 can be suppressed.
  • the contact width TW of the tread 60 means that the tire 10 is mounted on a standard rim stipulated in JATMA YEAR BOOK (2018 version, Japan Automobile Tire Association Standard), and applicable size / prior rating in JATMA YEAR BOOK. Is filled with 100% of the internal pressure corresponding to the maximum load capacity (that is, the bold load in the internal pressure-load capacity correspondence table) (ie, the maximum air pressure), and the axis of rotation is parallel to the horizontal plate in a stationary state. When the mass corresponding to the maximum load capacity is added. When the TRA standard or ETRTO standard is applied at the place of use or manufacturing, the respective standards are followed.
  • the embodiment of the present disclosure is not limited thereto, and the reinforcing cord 42C in the resin belt layer 40 may be a monofilament cord or a cord in which a plurality of filaments are twisted instead of the steel cord.
  • organic fibers such as aramid, carbon, and the like may be used.
  • Various designs can be adopted for the twist structure, and various cross-sectional structures, twist pitches, twist directions, and distances between adjacent filaments can be used.
  • the resin belt layer 40 and the tread 60 are integrated by an adhesive or vulcanization adhesion.
  • the resin material used for the resin belt layer 40 is a thermoplastic resin.
  • the embodiment of the present disclosure is not limited thereto, and examples of the resin material include thermoplastic elastomers, thermosetting resins, (meth) acrylic resins, EVA resins, vinyl chloride resins, fluorine resins, and silicone resins.
  • thermoplastic elastomers include thermosetting resins, (meth) acrylic resins, EVA resins, vinyl chloride resins, fluorine resins, and silicone resins.
  • engineering plastics including super engineering plastics
  • the resin material here does not include vulcanized rubber.
  • Thermoplastic resin refers to a polymer compound that softens and flows as the temperature rises and becomes relatively hard and strong when cooled.
  • the material softens and flows with increasing temperature, and becomes relatively hard and strong when cooled, and a high molecular compound having rubber-like elasticity is a thermoplastic elastomer, and the material increases with increasing temperature. Is softened, fluidized, and becomes a relatively hard and strong state when cooled, and a high molecular compound having no rubber-like elasticity is distinguished as a thermoplastic resin that is not an elastomer.
  • Thermoplastic resins include polyolefin-based thermoplastic elastomers (TPO), polystyrene-based thermoplastic elastomers (TPS), polyamide-based thermoplastic elastomers (TPA), polyurethane-based thermoplastic elastomers (TPU), and polyesters.
  • TPO polyolefin-based thermoplastic elastomers
  • TPS polystyrene-based thermoplastic elastomers
  • TPA polyamide-based thermoplastic elastomers
  • TPU polyurethane-based thermoplastic elastomers
  • polyesters polyesters.
  • TSV dynamically crosslinked thermoplastic elastomer
  • polyolefin thermoplastic resin polystyrene thermoplastic resin
  • polyamide thermoplastic resin polyamide thermoplastic resin
  • polyester thermoplastic resin etc. Can be mentioned.
  • thermosetting resin refers to a polymer compound that forms a three-dimensional network structure as the temperature rises and cures, and examples thereof include a phenol resin, an epoxy resin, a melamine resin, and a urea resin.
  • FIG. 2 In the resin belt layer 40, the front ends of the reinforcing cords 42C are exposed on the front end surfaces 42E1 and 42E2 in the circumferential direction of the resin-coated cord 42.
  • a resin protective member 70 is fused to the front end surfaces 42E1 and 42E2.
  • the protection member 70 is a cover member that protects the tip of the reinforcing cord 42C.
  • the protection member 70 is a rigidity step reducing member that reduces the rigidity step at the tip of the resin-coated cord 42.
  • illustration of the protection member 70 is abbreviate
  • the protective member 70 is formed using the same resin as the coating resin 42S, and extends along the tire circumferential direction (arrow S direction). Further, the cross-sectional shape of the protective member 70 along the tire width direction and the radial direction is substantially equal to the cross-sectional shape of the resin-coated cord 42.
  • the protective member according to the embodiment of the present disclosure can have various shapes.
  • the protective member may have a shape in which the tire radial dimension gradually decreases toward the tip in the tire circumferential direction, like a protective member 72 shown in FIGS. 5A and 5B.
  • the inclined surface 72S is inclined toward the carcass 16.
  • the “shape in which the tire radial direction dimension gradually decreases” may be a curved shape, a stepped shape, or the like in addition to the linear shape shown in FIG. 5B.
  • the protective member 72 has a shape in which the tire radial dimension gradually decreases in the entire tire circumferential direction, it is only necessary to gradually decrease the tire radial dimension only at the circumferential tip.
  • the protective member may have a shape in which the size in the tire width direction gradually decreases toward the tip in the tire circumferential direction, as in the protective member 74 shown in FIGS. 6A and 6B.
  • the inclined surface 74S is inclined toward the resin-coated cord 42 adjacent in the tire width direction.
  • the “shape in which the tire width direction dimension gradually decreases” may be a curved shape, a stepped shape, or the like in addition to the linear shape shown in FIG. 6A.
  • the protective member 74 has a shape in which the tire width direction dimension gradually decreases in the entire tire circumferential direction, it is only necessary to gradually decrease the tire width direction dimension at least at the front end portion in the circumferential direction.
  • the protective member may have a shape in which the tire radial direction dimension and the tire width direction dimension gradually decrease toward the tip in the tire circumferential direction, as in the protective member 76 shown in FIGS. 7A and 7B.
  • the two inclined surfaces 76S are inclined toward the carcass 16 or the resin-coated cord 42 adjacent in the tire width direction, respectively.
  • the “shape in which the tire radial dimension gradually decreases” may be a curved shape or the like in addition to the linear shape shown in FIG. 5B.
  • a tread 60 is provided outside the resin belt layer 40 in the tire radial direction.
  • the tread 60 is a part that contacts the road surface during traveling.
  • a plurality of circumferential grooves 62 extending in the tire circumferential direction are formed on the tread surface of the tread 60.
  • the shape and number of the circumferential grooves 62 are appropriately set according to the performance such as drainage performance and steering stability required for the tire 10.
  • the resin belt layer 40 is formed by winding the resin-coated cord 42 spirally in the tire circumferential direction.
  • the resin-coated cord 42 is formed by coating the reinforcing cord 42C with a coating resin 42S.
  • a resin protective member 70 is fused to the front end surface of the resin-coated cord 42. For this reason, the tip of the reinforcing cord 42C is protected. For example, since the tip of the reinforcing cord 42C is covered with resin, it is difficult to rust. Further, it is possible to prevent moisture from penetrating from the front end surface of the resin-coated cord 42 through the reinforcing cord 42 ⁇ / b> C to the inside of the resin-coated cord 42.
  • the protective member 70 is formed using the same resin as the coating resin 42S, but the reinforcing cord 42C is not embedded in the protective member 70. For this reason, the protection member 70 has lower rigidity than the resin-coated cord 42. As a result, as shown in FIG. 4C, the rigidity in the tire circumferential direction in the vicinity of the front end surfaces 42E1 and 42E2 (that is, the front end portion) of the resin-coated cord 42 can be prevented from suddenly changing from the front end surfaces 42E1 and 42E2. That is, the rigidity step can be reduced.
  • the horizontal axis (S) in FIG. 4C indicates the circumferential position.
  • the vertical axis (G) indicates the rigidity at the cross-sectional position where the reinforcing cord 42C passes in the outermost resin-coated cord 42 in the tire width direction. The same applies to FIGS. 5C, 8C, 8D, 9C, and 9D described later.
  • the tire radial direction dimension of the protective member 72 gradually decreases toward the tip in the tire circumferential direction. For this reason, as shown to FIG. 5C, the rigidity of a tire circumferential direction also reduces gradually. Thereby, the rigidity step can be relaxed. Further, even if a protective member 74 (see FIGS. 6A and 6B) and a protective member 76 (see FIGS. 7A and 7B) are used instead of the protective member 70, the rigidity step can be reduced.
  • the front end surfaces 42E1 and 42E2 of the resin-coated cord 42 are surfaces along the tire width direction and the radial direction, and are substantially perpendicular to the tire circumferential direction.
  • the resin-coated cord 42A according to the second embodiment has the tip surfaces 42AE1 and 42AE2 inclined in a range of less than 90 ° with respect to the tire circumferential direction and the radial direction.
  • the front end surfaces 42AE1 and 42AE2 are inclined toward the carcass 16. That is, the resin-coated cord 42A has a shape in which the tire radial direction dimension of the tip portion gradually decreases toward the tip in the tire circumferential direction.
  • the “shape in which the tire radial direction dimension gradually decreases” can be a straight shape, a curved shape, or the like.
  • a protective member is fused to the front end surfaces 42AE1 and 42AE2 of the resin-coated cord 42A having a shape in which the tire radial dimension gradually decreases toward the front end in the tire circumferential direction.
  • this protective member can be a protective member 70A.
  • the protective member 70 ⁇ / b> A has a cross-sectional shape along the tire width direction and the radial direction at the front end portion substantially equal to the cross-sectional shape of the resin-coated cord 42.
  • the protective member 70A may be formed of a resin having a lower rigidity than the coating resin 42S. In this case, as shown in FIG. 8D, the rigidity step can be relaxed.
  • the protective member fused to the front end surfaces 42AE1 and 42AE2 of the resin-coated cord 42A can be a protective member 72A as shown in FIGS. 9A and 9B.
  • the protective member 72A has a shape in which the tire radial dimension of the tip portion gradually decreases toward the tip in the tire circumferential direction.
  • the rigidity step in the tire circumferential direction can be reduced as shown in FIG. 9C.
  • the protective member 72A may be formed of a resin having a lower rigidity than the coating resin 42S. In this case, as shown in FIG. 9D, the rigidity step can be relaxed.
  • the embodiment in which the protective member is formed of a resin having lower rigidity than the coating resin 42S can be applied to the other embodiments.
  • the protective member fused to the tip surfaces 42AE1 and 42AE2 of the resin-coated cord 42A can be a protective member 74A as shown in FIGS. 10A and 10B.
  • the protection member 74 ⁇ / b> A has a shape in which the tire width direction dimension of the tip portion gradually decreases toward the tip in the tire circumferential direction.
  • the protective member fused to the front end surfaces 42AE1 and 42AE2 of the resin-coated cord 42A can be a protective member 76A as shown in FIGS. 11A and 11B.
  • the protection member 76A has a shape in which the tire radial direction dimension and the tire width direction dimension of the front end portion gradually decrease toward the front end in the tire circumferential direction.
  • the front end surfaces 42E1 and 42E2 of the resin-coated cord 42 are surfaces along the tire width direction and the radial direction, and are substantially perpendicular to the tire circumferential direction.
  • the resin-coated cord 42B in the third embodiment is inclined such that the front end surfaces 42BE1 and 42BE2 are less than 90 ° with respect to the tire circumferential direction.
  • the tip surfaces 42BE1 and 42BE2 are inclined toward the resin-coated cord 42 adjacent in the tire width direction. That is, the resin-coated cord may have a shape in which the size in the tire width direction of the tip portion gradually decreases toward the tip in the tire circumferential direction.
  • a protective member is fused to the front end surfaces 42BE1 and 42BE2 of the resin-coated cord 42B having a shape in which the tire width direction dimension gradually decreases toward the front end in the tire circumferential direction.
  • this protective member can be a protective member 70B.
  • the protective member 70 ⁇ / b> B has a cross-sectional shape along the tire width direction and a radial direction substantially equal to the cross-sectional shape of the resin-coated cord 42.
  • the protective member fused to the front end surfaces 42BE1 and 42BE2 of the resin-coated cord 42B can be a protective member 72B as shown in FIGS. 13A and 13B.
  • the protection member 72 ⁇ / b> B has a shape in which the tire radial direction dimension gradually decreases toward the tire circumferential direction front end.
  • the protective member fused to the tip surfaces 42BE1 and 42BE2 of the resin-coated cord 42B can be a protective member 74B as shown in FIGS. 14A and 14B.
  • the protection member 74 ⁇ / b> B has a shape in which the tire width direction dimension of the tip portion gradually decreases toward the tip in the tire circumferential direction.
  • the protective member fused to the front end surfaces 42BE1 and 42BE2 of the resin-coated cord 42B can be a protective member 76B as shown in FIGS. 15A and 15B.
  • the protection member 76B has a shape in which the tire radial direction dimension and the tire width direction dimension of the front end portion gradually decrease toward the front end in the tire circumferential direction.
  • the resin-coated cord 42A according to the second embodiment has a shape in which the tire radial direction dimension of the tip portion gradually decreases toward the tip in the tire circumferential direction.
  • the resin-coated cord 42B in the third embodiment has a shape in which the tire width direction dimension of the tip portion gradually decreases toward the tip in the tire circumferential direction, but the embodiment of the present disclosure is not limited thereto.
  • the front end portion of the resin-coated cord has both the tire radial direction dimension and the tire width direction dimension toward the front end in the tire circumferential direction.
  • the shape may be gradually reduced.
  • the resin belt layer 40 is formed by coating one reinforcing cord 42C with a coating resin 42S to form a substantially square resin-coated cord 42.
  • a coating resin 42S to form a substantially square resin-coated cord 42.
  • a plurality of (for example, two) reinforcing cords 44C may be formed using a resin-coated cord 44 having a substantially parallelogram cross section formed by coating with a coating resin 44S. .
  • each shape shown in the above embodiments can be applied.
  • the reinforcing cords 44C arranged on the outer side in the tire width direction may be formed shorter than the reinforcing cords 44C arranged on the inner side in the tire width direction.
  • Each reinforcing cord 44C is formed with stepped end surfaces 44E1 and 44E2 so that the end surfaces are exposed.
  • a protective member 78 may be formed in a step shape.
  • a chamfer R may be formed at the ends of the resin-coated cord and the protective member in the tire width direction, like the resin-coated cord 42 and the protective member 70 in FIGS. 18A, 18B, 18C, and 18D.
  • the chamfer R includes a protective member 72 having a shape in which the tire radial direction dimension and the tire width direction dimension gradually decrease toward the front end in the tire circumferential direction. 74 (see FIGS. 6A and 6B).
  • the bead core 12A shown in FIG. 1 is a wire bundle.
  • the bead core 12A may be formed of a resin-coated cord. That is, the bead core 12A may be formed of the resin-coated cord 46 as shown in FIGS. 20A and 20B.
  • the resin-coated cord 46 can be configured by coating one or a plurality of reinforcing cords 46C with a coating resin 46S. However, in this embodiment, as an example, as shown in FIG. 20B, three reinforcing cords 46C are covered with a coating resin 46S. As shown in FIG. 20A, the resin-coated cord 46 is disposed by winding about 3 turns in the tire circumferential direction. The coating resins 46S adjacent to each other in the tire radial direction are joined by fusion bonding. Thereby, the bead core 12A in which the reinforcing cord 46C is coated with the coating resin 46S is formed. Note that the number of windings of the resin-coated cord 46 (three in the present embodiment) and the number of reinforcing cords 46C disposed per winding (three in the present embodiment) can be appropriately increased or decreased depending on the purpose. .
  • the front end surfaces 46E1 and 46E2 of the resin-coated cord 46 are similar to the protective members 70, 70A, 70B, 72, 72A, 72B, 74, 74A, 74B, 76, 76A, 76B, 78 described above.
  • the shaped protective member can be fused. 20 shows an example in which the protective member 72 is fused.
  • front end surfaces 46E1 and 46E2 are formed along the tire radial direction in FIG. 20, the embodiment of the present disclosure is not limited to this, and the shapes of the front end surfaces 46E1 and 46E2 can be changed as appropriate. it can.
  • the tip surfaces 42E1 and 42E2 of the resin-coated cord 42 in the resin belt layer 40 are
  • the resin belt layer 40 is not necessarily provided as a belt layer provided on the outer side in the tire radial direction of the carcass 16, and the resin belt layer 40 may be replaced with a rubber belt layer in which a cord is covered with rubber.
  • At least one of the belt layer and the bead core 12A includes a resin-coated cord and a protective member.
  • the present disclosure can be implemented in various ways.

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  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Ropes Or Cables (AREA)

Abstract

Un pneumatique selon la présente invention comprend : une carcasse formée à travers une paire de tringles ; une couche de ceinture de résine disposée sur le côté extérieur de la carcasse dans la direction radiale du pneu et composée d'un cordon revêtu de résine formé par revêtement d'un cordon avec de la résine, le cordon revêtu de résine étant enroulé en une forme de spirale dans la direction circonférentielle du pneu ; et un élément de protection en résine fusionné à une surface d'extrémité avant du cordon revêtu de résine et s'étendant le long de la direction circonférentielle du pneu.
PCT/JP2019/021997 2018-06-15 2019-06-03 Pneumatique WO2019239941A1 (fr)

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JP2018-114849 2018-06-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3812173A4 (fr) * 2018-06-25 2022-06-08 Bridgestone Corporation Pneumatique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0459831A (ja) * 1990-06-29 1992-02-26 Teijin Ltd ゴム補強用材料
JP2007069745A (ja) * 2005-09-07 2007-03-22 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2010111074A (ja) * 2008-11-07 2010-05-20 Bridgestone Corp 超音波接合装置及びタイヤ製造方法
WO2011030765A1 (fr) * 2009-09-10 2011-03-17 不二精工株式会社 Tringle de talon pour pneu et pneu utilisant la tringle de talon
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
JP2017109434A (ja) * 2015-12-18 2017-06-22 東洋ゴム工業株式会社 タイヤ及びタイヤの製造方法
WO2018101175A1 (fr) * 2016-12-02 2018-06-07 株式会社ブリヂストン Pneumatique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0459831A (ja) * 1990-06-29 1992-02-26 Teijin Ltd ゴム補強用材料
JP2007069745A (ja) * 2005-09-07 2007-03-22 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2010111074A (ja) * 2008-11-07 2010-05-20 Bridgestone Corp 超音波接合装置及びタイヤ製造方法
WO2011030765A1 (fr) * 2009-09-10 2011-03-17 不二精工株式会社 Tringle de talon pour pneu et pneu utilisant la tringle de talon
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
JP2017109434A (ja) * 2015-12-18 2017-06-22 東洋ゴム工業株式会社 タイヤ及びタイヤの製造方法
WO2018101175A1 (fr) * 2016-12-02 2018-06-07 株式会社ブリヂストン Pneumatique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3812173A4 (fr) * 2018-06-25 2022-06-08 Bridgestone Corporation Pneumatique

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