WO2019230773A1 - Pneumatique - Google Patents

Pneumatique Download PDF

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Publication number
WO2019230773A1
WO2019230773A1 PCT/JP2019/021239 JP2019021239W WO2019230773A1 WO 2019230773 A1 WO2019230773 A1 WO 2019230773A1 JP 2019021239 W JP2019021239 W JP 2019021239W WO 2019230773 A1 WO2019230773 A1 WO 2019230773A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
width direction
resin
reinforcing member
belt
Prior art date
Application number
PCT/JP2019/021239
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English (en)
Japanese (ja)
Inventor
圭一 長谷川
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 WO2019230773A1 publication Critical patent/WO2019230773A1/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
    • 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 invention relates to a pneumatic tire.
  • a belt is usually disposed outside the carcass in the tire radial direction in order to improve tire performance (for example, Patent Document 1).
  • the belt is formed by spirally winding a resin-coated cord or a rubber-coated cord with a cord coated with a coating material such as resin or rubber in the tire circumferential direction (so-called spiral belt).
  • a belt formed by spirally winding a resin-coated cord or a rubber-coated cord in the tire circumferential direction has a problem that it is weak against input due to protrusions or the like because its binding force in the tire width direction is slightly low. .
  • an object of the present invention is to provide a pneumatic tire having excellent protrusion penetration resistance.
  • the gist configuration of the present invention is as follows.
  • the pneumatic tire of the present invention comprises a belt in which a cord covered with a coating material is spirally wound in the tire circumferential direction, and a width direction reinforcing member, And further including one or more circumferential main grooves extending continuously in the tire circumferential direction;
  • the width direction reinforcing member is arranged over at least a region between end portions in the tire width direction of the one or more circumferential main grooves.
  • the “circumferential main groove” refers to a groove having a groove width (opening width) of 2 mm or more.
  • the “groove width” and other dimensions in the present specification are measured in a state in which the tire is mounted on the applicable rim, filled with the specified internal pressure, and in a no-load state.
  • the “circumferential main groove” may extend linearly, or may extend in a curved shape or zigzag shape, and in the case of linear extension, it extends at an inclination angle of 10 ° or less with respect to the tire circumferential direction. Preferably it is.
  • tire contact width means that the outermost position in the tire width direction of the contact surface in the state where the tire is mounted on the applicable rim, the specified internal pressure is filled, and the maximum load is applied is the ground end, and the tire is applied to the applicable rim. It is set as the distance in the tire width direction between the ground contact ends in a state in which it is mounted and filled with the specified internal pressure and is in a no-load state.
  • appcable rim is an industrial standard effective in the region where tires are produced and used.
  • JATMA Joint Automobile Tire Association
  • JATMA YEAR BOOK and in Europe, ETRTO (The European) Tire and Rim Technical Organization's STANDARDDS MANUAL, in the United States TRA (The Tire and Rim Association, Inc.) YEAR BOOK, etc.
  • Standard rim (ETRTOSTANDAND in the applicable size to be described in the future) Refers to Measuring Rim, TRA's YEAR BOOK, Design Rim) (ie, “Rim” above) In addition to the current size, it includes the size that can be included in the above industrial standards in the future.As an example of “future size to be described”, it is described as “FUTURE DEVELOPMENTS” in ETRTO STANDARDDS MANUAL 2013 edition. However, in the case of a size not described in the industry standard, it means a rim having a width corresponding to the tire bead width.
  • the “specified internal pressure” refers to an air pressure (maximum air pressure) corresponding to the tire maximum load capacity of the standard such as JATMA in a tire of an applicable size. In the case of a size not described in the industry standard, the “specified internal pressure” refers to an air pressure (maximum air pressure) corresponding to a maximum load capacity specified for each vehicle on which a tire is mounted. “Maximum load load” is the tire maximum load capacity of the standard such as JATMA for the tire of the applicable size, or, in the case of a size not described in the industry standard, the maximum load capacity defined for each vehicle on which the tire is mounted. Means the load corresponding to.
  • the present invention can provide a pneumatic tire excellent in protrusion penetration resistance.
  • FIG. 1 is a schematic cross-sectional view in the tire width direction showing a pneumatic tire according to an embodiment of the present invention. It is a schematic sectional drawing which shows the belt, the resin reinforcement layer, and the width direction reinforcement member in embodiment shown in FIG. It is a tire width direction schematic sectional drawing which shows the pneumatic tire concerning other embodiment of this invention.
  • FIG. 1 is a schematic cross-sectional view in the tire width direction showing a pneumatic tire according to an embodiment of the present invention.
  • the pneumatic tire 1 of the present embodiment (hereinafter also simply referred to as a tire) includes a carcass 3 straddling a bead core 2 a embedded in a pair of bead portions 2 in a toroidal shape.
  • the tire 1 includes a belt 4 and a tread 5 in this order on the outer side in the tire radial direction of the crown portion of the carcass 3.
  • the tire 1 of the present embodiment has the same configuration between the half portions in the tire width direction with the tire equatorial plane CL as a boundary, but may be asymmetrical. .
  • the tire 1 of the present embodiment has a bead core 2a in which steel cords are bundled.
  • the material and shape of the bead core are not particularly limited, or may have a structure without the bead core 2a.
  • the carcass 3 is comprised by the one carcass ply consisting of organic fiber, the material and the number of carcass plies are not particularly limited.
  • the belt 4 is a spiral belt in a state in which a resin-coated cord in which the cord 4b is coated with the coating resin 4a is spirally wound around the tire axis.
  • the belt 4 is preferably a single layer. It is because it is preferable from a viewpoint of weight reduction.
  • the width of the belt 4 in the tire width direction can be, for example, 90 to 120% of the tire ground contact width.
  • the thickness (maximum thickness) of the belt 4 is not particularly limited, but may be 2 to 6 mm, for example.
  • the cord 4b any known material can be used, for example, a steel cord can be used.
  • the steel cord can be made of, for example, steel monofilament or stranded wire.
  • the cord 4b can also use organic fiber, carbon fiber, or the like.
  • a thermoplastic elastomer or a thermoplastic resin can be used, and a resin that is cross-linked by heat or an electron beam or a resin that is cured by thermal dislocation can also be used.
  • thermoplastic elastomers polyolefin-based thermoplastic elastomer (TPO), polystyrene-based thermoplastic elastomer (TPS), polyamide-based thermoplastic elastomer (TPA), polyurethane-based thermoplastic elastomer (TPU), polyester-based thermoplastic elastomer (TPC) And dynamic crosslinkable thermoplastic elastomer (TPV).
  • thermoplastic resin examples include polyurethane resin, polyolefin resin, vinyl chloride resin, polyamide resin and the like.
  • the deflection temperature under load (when 0.45 MPa is loaded) specified in ISO 75-2 or ASTM D648 is 78 ° C or more, and the tensile yield strength specified in JIS K7113 is used. 10 MPa or more, and the tensile elongation at break (JIS K7113) specified in JIS K7113 is 50% or more and the Vicat softening temperature (Method A) specified in JIS K7206 is 130 ° C or more. Can do.
  • the tensile elastic modulus (specified in JIS K7113: 1995) of the coating resin 4a that covers the cord 4b is preferably 50 MPa or more. This is because the belt rigidity can be increased.
  • the tensile modulus of the coating resin 4a that covers the cord 4b is preferably 1000 MPa or less. This is because the ride comfort can be maintained well.
  • the coating resin 4a here does not include rubber (an organic polymer substance exhibiting rubber elasticity at room temperature).
  • the resin-coated cord can be formed, for example, by coating a molten coating resin 4a on the outer peripheral side of the cord 4b and solidifying by cooling.
  • FIG. 2 is a schematic sectional view showing the belt 4, the resin reinforcing layer 6, and the width direction reinforcing member 7 in the embodiment shown in FIG.
  • the tire 1 of the present embodiment includes a resin reinforcing layer 6 on the inner side in the tire radial direction of the belt 4.
  • the resin reinforcing layer 6 is a layer made of a plate-like resin.
  • the width of the resin reinforcing layer 6 in the tire width direction is larger than the width of the belt 4 in the tire width direction, and can be, for example, 100 to 130% of the tire ground contact width.
  • the thickness (maximum thickness) of the resin reinforcing layer 6 is not particularly limited, but may be, for example, 0.1 to 3 mm.
  • FIG. 3 is a schematic cross-sectional view in the tire width direction showing a pneumatic tire according to another embodiment of the present invention. As shown in FIG.
  • a configuration without the resin reinforcing layer 6 may be employed. Further, as shown in FIG. 3, in the present invention, a width direction reinforcing member 7 can be disposed on the inner side in the tire radial direction of the carcass 3.
  • the tire 1 of the present embodiment further includes a width direction reinforcing member 7 on the inner side of the belt 4 in the tire radial direction (in this example, on the inner side of the resin reinforcing layer 6 in the tire radial direction).
  • the width of the width direction reinforcing member 7 in the tire width direction is smaller than the width of the belt 4 in the tire width direction, and may be, for example, 80 to 110% of the tire ground contact width.
  • the thickness (maximum thickness) of the width direction reinforcing member 7 is not particularly limited, but may be 0.5 to 1.5 mm, for example.
  • the width-direction reinforcing member 7 is a member formed by rubber-coating (one or a plurality of) steel cords or organic fiber cords extending obliquely with respect to the tire circumferential direction.
  • the steel cord or the organic fiber cord is preferably inclined at an angle of 45 to 90 ° with respect to the tire circumferential direction.
  • the rubber any known material may be used.
  • a rubber often used for tire rubber may be used.
  • the steel cord one made of monofilament or one obtained by twisting a plurality of monofilaments can be used.
  • nylon or the like can be used as the organic fiber, and a single fiber or a plurality of single fibers twisted together can be used.
  • the width direction reinforcing member 7 may be a member made of resin.
  • the resin since the resin has a higher rigidity than the weight, it is preferable to reduce the weight by adopting a configuration without the steel cord or the organic fiber cord.
  • the steel cord or the organic fiber is preferable.
  • the cord may be covered with a resin.
  • the resin of the width direction reinforcing member 7 a resin of the same material as the coating resin 4 a of the belt 4 can be used, but a different resin can also be used.
  • the tensile modulus of elasticity of the resin of the width direction reinforcing member 7 (specified in JIS K7113: 1995) is preferably 50 MPa or more. This is because the belt rigidity can be reinforced and increased. Moreover, it is preferable that the tensile elasticity modulus of resin of the width direction reinforcement member 7 shall be 1000 Mpa or less. It is because riding comfort etc. can be maintained favorable.
  • the tire 1 of the present embodiment has one or more tires (in the illustrated example, the tire equator) that are inclined at an angle of 10 ° or less and continuously extend linearly. Further, there are four circumferential main grooves 8 in total in the tire width direction half with the surface CL as a boundary. The number and arrangement of the circumferential main grooves 8 may be arbitrary (if one or more are provided).
  • the width direction reinforcement member 7 is arrange
  • the width direction reinforcing member 7 extends continuously in the tire width direction. That is, the width direction reinforcing member 7 is disposed at a position in the tire width direction corresponding to one or more circumferential main grooves 8, and the width of the width direction reinforcing member 7 in the tire width direction is the circumferential direction main groove 8. It is larger than the width in the tire width direction between the ends in the tire width direction.
  • the width direction reinforcing member 7 is preferably provided in a tire width direction region including at least the tire equatorial plane CL.
  • the width direction reinforcing member 7 may be provided at least in the entire region in the tire width direction region between the two circumferential main grooves closest to the tire equatorial plane CL. preferable.
  • the effect of the pneumatic tire of this embodiment is explained.
  • the rigidity of the belt 4 is sufficiently reinforced to enhance the steering stability. Etc. can be improved. Furthermore, since the pneumatic tire of the present embodiment has the width direction reinforcing member 7 in the tire width direction region, the rigidity in the tire width direction is provided at the portion where the circumferential main groove 8 is disposed with low rigidity. By arranging the high member, the width direction reinforcing member 7 bears the tensile force in the tire width direction that is generated when the protrusion is overcome, so that the protrusion penetration resistance can be improved.
  • the width direction reinforcing member 7 is placed on the inner side in the tire radial direction of the belt 4 (in this embodiment, the tire radial direction of the resin reinforcing layer 6 By arranging the inner side), the width direction reinforcing member 7 can bear the tensile force in the tire width direction more effectively.
  • the belt 4 is a resin-coated belt, and since the resin has higher rigidity than the weight in comparison with rubber, it is possible to improve tire performance such as steering stability while reducing the weight. it can.
  • the width direction reinforcing member 7 is made of steel cord or organic fiber cord covered with rubber, the rigidity in the tire width direction can be higher than the rigidity in the tire circumferential direction depending on the extending direction of the cord. It can be adjusted by the inclination angle of the cord. As described above, according to the pneumatic tire of the present embodiment, the protrusion penetration resistance can be improved.
  • the coating material is preferably a resin. This is because the resin has higher rigidity than the weight in comparison with the rubber, so that the tire performance such as steering stability can be improved while reducing the weight.
  • the covering material is preferably rubber. This is because the rubber-coated cord is particularly excellent in manufacturability.
  • the width-direction reinforcing member 7 is a member formed by rubber coating a steel cord or an organic fiber cord extending obliquely with respect to the tire circumferential direction. Is preferred. Since the rigidity in the extending direction of the cord can be increased, it can be adjusted by the extending angle of the cord or the like when securing the rigidity of the width direction reinforcing member 7 in the tire width direction.
  • the steel cord or the organic fiber cord preferably extends at an inclination angle of 80 ° to 90 ° with respect to the tire circumferential direction in order to ensure rigidity in the tire width direction.
  • the width direction reinforcing member is preferably a member made of resin. This is because the rigidity of the resin is higher than the weight, so that the rigidity of the width direction reinforcing member 7 in the tire width direction can be ensured while reducing the weight.
  • two or more circumferential main grooves 8 are provided, and in the tire width direction region between the two circumferential main grooves 8 adjacent in the tire width direction, the width direction reinforcement is performed. It is preferable to have a region where the member 7 is not disposed.
  • the width direction reinforcing member 7 is disposed on the inner side in the tire radial direction of the belt 4, but the width direction reinforcing member 7 may be disposed on the outer side in the tire radial direction of the belt 4.
  • the width of the resin reinforcing layer 6 in the tire width direction is larger than the width of the belt 4 in the tire width direction, but may be the same or smaller.
  • the width direction reinforcing member 7 may be provided outside the resin reinforcing layer 6 in the tire radial direction as long as it is inside the belt 4 in the tire radial direction.
  • the width of the width direction reinforcing member 7 in the tire width direction is smaller than the width of the belt 4 and the resin reinforcing layer 6 in the tire width direction, but either or both of the belt 4 and the resin reinforcing layer 6 are used. It may be larger than the width in the tire width direction. This means that, depending on the position of the circumferential main groove 8 in the tire width direction (for example, when the circumferential main groove 8 is arranged on the outer side in the tire width direction), the width direction reinforcing member 7 is moved to the position in the tire width direction.
  • the shoulder portion with low rigidity In order to reinforce the protrusion and further improve the protrusion penetration resistance, such a large width can be used.
  • the invention example in which the width direction reinforcing member 7 having a width of 60 mm in the tire width direction is arranged has higher plunger durability than the comparative example.

Abstract

La présente invention concerne un pneumatique comportant : une ceinture comprenant un câblé revêtu d'un matériau de revêtement et enroulé en spirale dans une direction circonférentielle du pneu ; et un élément de renforcement dans le sens de la largeur. Le pneumatique comprend en outre une ou plusieurs rainures principales circonférentielles s'étendant de façon continue dans la direction circonférentielle du pneu. L'élément de renforcement dans le sens de la largeur est disposé au moins sur une région entre des extrémités dans le sens de la largeur du pneu de la ou des rainures principales circonférentielles.
PCT/JP2019/021239 2018-05-31 2019-05-29 Pneumatique WO2019230773A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-105565 2018-05-31
JP2018105565A JP2019209755A (ja) 2018-05-31 2018-05-31 空気入りタイヤ

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WO2019230773A1 true WO2019230773A1 (fr) 2019-12-05

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021125112A1 (fr) * 2019-12-20 2021-06-24 株式会社ブリヂストン Bandage pneumatique
JP7377698B2 (ja) 2019-12-20 2023-11-10 株式会社ブリヂストン 空気入りタイヤ
JP7377699B2 (ja) 2019-12-20 2023-11-10 株式会社ブリヂストン 空気入りタイヤ

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004284552A (ja) * 2003-03-25 2004-10-14 Bridgestone Corp 空気入りタイヤ
JP2005035345A (ja) * 2003-07-17 2005-02-10 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2006103397A (ja) * 2004-10-01 2006-04-20 Bridgestone Corp 空気入りタイヤ
JP2008285059A (ja) * 2007-05-18 2008-11-27 Bridgestone Corp 航空機用空気入りタイヤ
JP2009262826A (ja) * 2008-04-25 2009-11-12 Bridgestone Corp 空気入りタイヤ
JP2012035681A (ja) * 2010-08-04 2012-02-23 Bridgestone Corp 空気入りタイヤ
JP2012523340A (ja) * 2009-04-09 2012-10-04 ソシエテ ド テクノロジー ミシュラン 半径方向カーカス補強材を備えたタイヤ
JP2013537149A (ja) * 2010-09-21 2013-09-30 コンパニー ゼネラール デ エタブリッスマン ミシュラン 保護補強材を有するタイヤ
JP2015515412A (ja) * 2012-04-06 2015-05-28 コンパニー ゼネラール デ エタブリッスマン ミシュラン ラジアル又はクロスプライカーカスを備えたタイヤ
WO2017200064A1 (fr) * 2016-05-20 2017-11-23 株式会社ブリヂストン Pneumatique

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004284552A (ja) * 2003-03-25 2004-10-14 Bridgestone Corp 空気入りタイヤ
JP2005035345A (ja) * 2003-07-17 2005-02-10 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2006103397A (ja) * 2004-10-01 2006-04-20 Bridgestone Corp 空気入りタイヤ
JP2008285059A (ja) * 2007-05-18 2008-11-27 Bridgestone Corp 航空機用空気入りタイヤ
JP2009262826A (ja) * 2008-04-25 2009-11-12 Bridgestone Corp 空気入りタイヤ
JP2012523340A (ja) * 2009-04-09 2012-10-04 ソシエテ ド テクノロジー ミシュラン 半径方向カーカス補強材を備えたタイヤ
JP2012035681A (ja) * 2010-08-04 2012-02-23 Bridgestone Corp 空気入りタイヤ
JP2013537149A (ja) * 2010-09-21 2013-09-30 コンパニー ゼネラール デ エタブリッスマン ミシュラン 保護補強材を有するタイヤ
JP2015515412A (ja) * 2012-04-06 2015-05-28 コンパニー ゼネラール デ エタブリッスマン ミシュラン ラジアル又はクロスプライカーカスを備えたタイヤ
WO2017200064A1 (fr) * 2016-05-20 2017-11-23 株式会社ブリヂストン Pneumatique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021125112A1 (fr) * 2019-12-20 2021-06-24 株式会社ブリヂストン Bandage pneumatique
JP7377698B2 (ja) 2019-12-20 2023-11-10 株式会社ブリヂストン 空気入りタイヤ
JP7377699B2 (ja) 2019-12-20 2023-11-10 株式会社ブリヂストン 空気入りタイヤ

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