WO2019240101A1 - Cordon de câble et pneumatique le comprenant - Google Patents

Cordon de câble et pneumatique le comprenant Download PDF

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Publication number
WO2019240101A1
WO2019240101A1 PCT/JP2019/022992 JP2019022992W WO2019240101A1 WO 2019240101 A1 WO2019240101 A1 WO 2019240101A1 JP 2019022992 W JP2019022992 W JP 2019022992W WO 2019240101 A1 WO2019240101 A1 WO 2019240101A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheath
cable bead
tire
filament
bead
Prior art date
Application number
PCT/JP2019/022992
Other languages
English (en)
Japanese (ja)
Inventor
一敬 ▲徳▼冨
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
Priority to JP2020525568A priority Critical patent/JP7177831B2/ja
Publication of WO2019240101A1 publication Critical patent/WO2019240101A1/fr

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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to a cable bead and a tire using the cable bead, and more particularly to a cable bead that can improve the breakdown pressure resistance of the tire while maintaining a light weight and a tire using the cable bead.
  • Patent Document 1 proposes a cable bead having a five-layer structure.
  • This cable bead is made of carbon steel whose sheath filament is brass-plated, and the core is made of carbon steel having a carbon content equal to or less than that of the sheath filament. Then, the cable bead is taken out from the new tire using the cable bead, the inner diameter of the filament circle when the sheath filament wound in the coil shape is loosened, and the inner diameter of the bead when embedded in the tire is a. In this case, the durability of the bead is improved by setting b / a> 0.90.
  • Patent Document 1 the carbon content of the sheath filament is also examined. Specifically, when the carbon content of the sheath filament is less than 0.50% by weight, it is difficult to withstand the stress applied to the bead during traveling, and conversely, when it exceeds 0.90% by weight, It is stated that it is difficult to bend and that the minimum necessary elongation cannot be secured for a bead that can withstand the stresses that occur during tire travel.
  • a cable bead that serves as a core for supporting an aircraft fuselage has a cable bead structure, that is, a core diameter, a sheath diameter, and the number of sheath filaments, based on the breakdown pressure resistance.
  • Breaking pressure resistance is greatly affected by the strength of one sheath filament and the number of sheath filaments, and in order to ensure high breaking pressure resistance, it is necessary to increase the strength of the sheath filament. Therefore, conventionally, the sheath filament diameter is increased to increase the strength of the sheath filament. However, when the sheath filament diameter increases, the weight of the cable bead increases. Therefore, the breakdown pressure resistance and lightness of the tire are in a trade-off relationship.
  • an object of the present invention is to provide a cable bead capable of improving the fracture pressure resistance of the tire while maintaining the light weight, and a tire using the same.
  • the present inventor made the sheath filament diameter predetermined by setting the carbon content of the sheath filament and the chromium content within a predetermined range. It has been found that the above problems can be solved, and the present invention has been completed.
  • a sheath filament has a carbon content of 0.90 mass% or more and 0.95 mass% or less, a chromium content of 0.15 mass% or more and 0.30 mass% or less, and
  • the sheath filament constituting the sheath at least one sheath filament having a wire diameter smaller than that of the innermost sheath layer is used.
  • the carbon content is measured by an infrared absorption method in accordance with JIS G1211 (Appendix 3: Total Carbon Quantitative Method—High Frequency Induction Furnace Combustion), and more specifically, a device called “CS-400” manufactured by LECO. Can be obtained by melting steel by high-frequency heating and performing quantitative analysis by an infrared absorption method.
  • the layer structure is a 1 + A + B + C + D + E structure, A is 6 or more and 14 or less, B is 8 or more and 22 or less, C is 14 or more and 30 or less, D is 26 or more and 42 or less, and E is 32. It is preferable that it is 50 or more.
  • 1 in the layer structure represents a core.
  • the sheath filament is preferably subjected to brass plating. Furthermore, in the cable bead of the present invention, the tensile strength of the sheath filament is preferably 2000 MPa or more. In the cable bead of the present invention, the diameter of the sheath filament is preferably 1.20 mm or more and 2.40 mm or less.
  • the tire of the present invention includes the cable bead of the present invention.
  • the present invention it is possible to provide a cable bead capable of improving the fracture pressure resistance of the tire while maintaining the light weight, and a tire using the cable bead.
  • the tire of the present invention can be suitably used for aircraft tires.
  • FIG. 1 is a schematic cross-sectional view in a tire width direction of a tire according to a preferred embodiment of the present invention.
  • FIG. 1 is a schematic cross-sectional view of a cable bead according to a preferred embodiment of the present invention.
  • a cable bead 10 according to the present invention includes a core 1 made of steel formed in an annular shape and a sheath 3 made of at least one sheath layer in which a sheath filament 2 made of steel is spirally wound around the core 1. And having.
  • the sheath 3 is a five-layer sheath including a first sheath layer 3a, a second sheath layer 3b, a third sheath layer 3c, a fourth sheath layer 3d, and a fifth sheath layer 3e, which are innermost sheath layers.
  • the structure of the cable bead 10 of the present invention is not limited to this, and the sheath layer may be five or more layers.
  • the illustrated cable bead 10 has a 1 + 8 + 16 + 27 + 33 + 39 structure.
  • the carbon content of the sheath filament 2 is 0.90 mass% or more and 0.95 mass% or less, and the chromium content is 0.15 mass% or more and 0.30 mass% or less. It is.
  • the sheath filament 2 can be reduced in diameter, and the cable bead 10 can be reduced in weight. That is, by setting the chromium content in the above range, even when the carbon content exceeds 0.90% by mass, the bead that can withstand the stress acting during running of the tire is difficult when the sheath filament is bent as described above.
  • the strength of the sheath filament 2 can be improved without causing the problem that the necessary minimum elongation cannot be ensured.
  • the sheath filament 2 can be reduced in diameter, which can contribute to weight reduction of the tire.
  • the chromium content in the sheath filament 2 is less than 0.15% by mass, the above effect cannot be obtained and the sheath filament 2 cannot be provided with sufficient strength.
  • chromium content exceeds 0.30 mass%, since it becomes disadvantageous on the surface of cost and the effect of this invention will be saturated, it is unpreferable.
  • the carbon content is preferably 0.91 mass% or more and 0.94 mass% or less, and the chromium content is preferably 0.17 mass% or more and 0.25 mass% or less, more preferably 0 20 mass% or more and 0.23 mass% or less.
  • the sheath filament constituting the sheath 3 In the cable bead 10 of the present invention, at least one type of sheath filament having a smaller wire diameter than the sheath filament of the innermost sheath layer is used as the sheath filament constituting the sheath 3. In conventional cable beads, all the sheath filaments have the same diameter. However, since the cable bead 10 of the present invention can increase the strength of the sheath filament 2 as described above, the sheath filament 2 can be reduced in diameter. Therefore, it is possible to contribute to weight reduction of the tire by using as the sheath filament 2 at least one sheath filament having a diameter smaller than that of the innermost sheath layer. For example, all the sheath filaments after the second sheath layer may be reduced in diameter, or only the sheath filaments of a predetermined sheath layer may be reduced in diameter.
  • the sheath filament diameter of the n-th sheath layer is ds n and the sheath filament diameter of the (n + 1) -th sheath layer is ds n + 1
  • the sheath filament diameter is reduced in the order of the first sheath layer 3a, the second sheath layer 3b, and the third sheath layer 3c, and the third sheath layer 3c, the fourth sheath layer 3d,
  • the sheath filaments of the fifth sheath layer 3e have the same diameter, but the cable bead 10 of the present invention is not limited to this as long as the above relational expression is satisfied.
  • the sheath layer is preferably 2 layers or more and 7 layers or less.
  • a 1 + A + B + C + D + E structure is preferable, and in the illustrated tire, the sheath 3 provided around the core 1 is composed of five sheath layers.
  • the number of sheath filaments 2 is preferably 6 to 14 or less, B to 8 to 22, C to 14 to 30, D to 26 to 42, E to 32 to 50, More preferably, A is from 7 to 12, B is from 12 to 20, C is from 18 to 26, D is from 28 to 40, and E is from 34 to 48.
  • the sheath filament 2 is preferably plated.
  • the plating treatment include brass plating, bronze plating, copper plating, zinc plating, and ternary alloy plating such as copper-cobalt-zinc plating. Brass plating is preferable.
  • the brass plating composition is not particularly limited, but the copper content is preferably 60% by mass or more.
  • the tensile strength of the sheath filament 2 is preferably 2000 MPa or more.
  • the tensile strength of the sheath filament 2 is preferably 2000 MPa or more.
  • the diameter of the sheath filament 2 is 1.20 mm or more and 2.40 mm or less.
  • the diameter of the sheath filament is preferably 2.0 mm or greater and 8.0 mm or less from the viewpoint of lightness and strength.
  • the carbon content and the chromium content in the sheath filament 2 may satisfy the above ranges, and the diameter of the sheath filament 2 may be set as described above. Absent.
  • the core 1 of the cable bead 10 can be manufactured in an annular shape by abutting and welding both ends of the core filament. Thereafter, for example, the cable bead 10 of the present invention can be manufactured by winding the sheath filament 2 that satisfies the above-described requirements spirally by being wound around a supply reel, around the core 1 in a spiral manner. .
  • the material of a core filament The material conventionally used as a core of a cable bead can be used.
  • FIG. 2 is a schematic cross-sectional view in the tire width direction of a tire according to a preferred embodiment of the present invention.
  • the illustrated tire 100 includes a tread portion 101, a pair of shoulder portions 102 located on both outer sides in the tire width direction of the tread portion 101, and a pair of sidewall portions 103 extending inward in the tire radial direction from the side portion of the shoulder portion 102.
  • a bead portion 104 connected to the inner side in the tire radial direction of each sidewall portion 103 and a bead core 105 having a circular cross section embedded in the bead portion 104 are provided.
  • the tire 100 includes a radial carcass 106 made of a carcass ply, which is formed of a plurality of organic fiber cords extending in a toroidal shape and extending at an angle in a range of 70 ° to 90 ° with respect to the tire equatorial plane. I have.
  • the radial carcass 106 extends around each bead core 105 in the radial direction so as to cover a turn-up ply that is wound up from the inner side to the outer side in the tire width direction, and a portion of the turn-up ply that is wound with respect to the bead core 105
  • it has a so-called up-down structure composed of a down ply extending at least to the radially inner portion of the bead core 105.
  • the tire 100 of the present invention uses the cable bead of the present invention as the bead core 105 embedded in the bead portion 104.
  • the cable bead of the present invention is a cable bead that can improve the breakdown pressure resistance while maintaining the lightness of the tire. Therefore, the tire 100 of the present invention is suitable for aircraft tires because it maintains lightness while improving fracture pressure resistance as compared with conventional tires.
  • the tire 100 of the present invention is not particularly limited except that the cable bead of the present invention is used as the bead core 105, and a known structure can be adopted for other structures.
  • a belt 107 composed of four belt layers and a belt protective layer 108 are sequentially arranged on the outer side in the tire radial direction of the radial carcass 106 of the tread portion 101.
  • a tread rubber is disposed on the outer side of the belt protective layer 108 in the tire radial direction, and a groove 109 such as a circumferential groove extending in the tire circumferential direction is formed on the surface of the tread rubber.
  • the belt 107 includes a total of four belt layers.
  • the number and arrangement positions of the belt layers may be any number or as required. It can be an arrangement position.
  • the cable bead of the present invention can improve the breakdown pressure resistance of the tire while maintaining the light weight.

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

Abstract

L'invention concerne un cordon de câble avec lequel il est possible d'augmenter la résistance à la fracture à haute pression d'un pneumatique tout en conservant des propriétés de légèreté, et un pneumatique comprenant le cordon de câble. Le cordon de câble (10) comprend un noyau annulaire (1) constitué d'acier et une gaine (3) constituée d'au moins deux couches de gaine composées chacune de filaments de gaine (2) constitués d'acier et enroulés en spirale autour du noyau (1), les filaments de gaine (2) ayant une teneur en carbone de 0,90-0,95 % en masse et une teneur en chrome de 0,15-0,30 % en masse, et les filaments de gaine (2) constituant la gaine (3) comprenant des filaments de gaine de la couche de gaine la plus interne et au moins un type de filaments de gaine ayant chacun un diamètre plus petit que les filaments de gaine de la couche de gaine la plus interne.
PCT/JP2019/022992 2018-06-11 2019-06-10 Cordon de câble et pneumatique le comprenant WO2019240101A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020525568A JP7177831B2 (ja) 2018-06-11 2019-06-10 ケーブルビードおよびこれを用いたタイヤ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-111392 2018-06-11
JP2018111392 2018-06-11

Publications (1)

Publication Number Publication Date
WO2019240101A1 true WO2019240101A1 (fr) 2019-12-19

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PCT/JP2019/022992 WO2019240101A1 (fr) 2018-06-11 2019-06-10 Cordon de câble et pneumatique le comprenant

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JP (1) JP7177831B2 (fr)
WO (1) WO2019240101A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220185034A1 (en) * 2020-12-16 2022-06-16 The Goodyear Tire & Rubber Company Tire with improved bead structure
US20220185035A1 (en) * 2020-12-16 2022-06-16 The Goodyear Tire & Rubber Company Tire with improved bead structure

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05147414A (ja) * 1991-11-29 1993-06-15 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JPH06211009A (ja) * 1993-01-20 1994-08-02 Bridgestone Corp 空気入りラジアルタイヤ
JPH108203A (ja) * 1996-06-24 1998-01-13 Nippon Steel Corp デスケーリング性と伸線性の優れた線材
JPH10183242A (ja) * 1996-12-20 1998-07-14 Sumitomo Metal Ind Ltd 高強度鋼線の製造方法
WO2000044954A1 (fr) * 1999-01-28 2000-08-03 Nippon Steel Corporation Fil pour fil d'acier a resistance a la fatigue elevee, fil d'acier et procede de production correspondant
JP2005067311A (ja) * 2003-08-21 2005-03-17 Bridgestone Corp 二輪車用空気入りタイヤ
JP2010242279A (ja) * 2009-03-19 2010-10-28 Sumitomo Denko Steel Wire Kk 環状同芯撚りビードコード、その製造方法、及び車両用タイヤ
JP2015523475A (ja) * 2012-06-07 2015-08-13 コンパニー ゼネラール デ エタブリッスマン ミシュラン タイヤのためのより軽いハイブリッドビードワイヤ
CN105415986A (zh) * 2015-12-14 2016-03-23 刘安林 一种轮胎及其缆型胎圈
WO2018194038A1 (fr) * 2017-04-17 2018-10-25 株式会社ブリヂストン Talon à câble et pneu d'avion l'utilisant

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05147414A (ja) * 1991-11-29 1993-06-15 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JPH06211009A (ja) * 1993-01-20 1994-08-02 Bridgestone Corp 空気入りラジアルタイヤ
JPH108203A (ja) * 1996-06-24 1998-01-13 Nippon Steel Corp デスケーリング性と伸線性の優れた線材
JPH10183242A (ja) * 1996-12-20 1998-07-14 Sumitomo Metal Ind Ltd 高強度鋼線の製造方法
WO2000044954A1 (fr) * 1999-01-28 2000-08-03 Nippon Steel Corporation Fil pour fil d'acier a resistance a la fatigue elevee, fil d'acier et procede de production correspondant
JP2005067311A (ja) * 2003-08-21 2005-03-17 Bridgestone Corp 二輪車用空気入りタイヤ
JP2010242279A (ja) * 2009-03-19 2010-10-28 Sumitomo Denko Steel Wire Kk 環状同芯撚りビードコード、その製造方法、及び車両用タイヤ
JP2015523475A (ja) * 2012-06-07 2015-08-13 コンパニー ゼネラール デ エタブリッスマン ミシュラン タイヤのためのより軽いハイブリッドビードワイヤ
CN105415986A (zh) * 2015-12-14 2016-03-23 刘安林 一种轮胎及其缆型胎圈
WO2018194038A1 (fr) * 2017-04-17 2018-10-25 株式会社ブリヂストン Talon à câble et pneu d'avion l'utilisant

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220185034A1 (en) * 2020-12-16 2022-06-16 The Goodyear Tire & Rubber Company Tire with improved bead structure
US20220185035A1 (en) * 2020-12-16 2022-06-16 The Goodyear Tire & Rubber Company Tire with improved bead structure
CN114633587A (zh) * 2020-12-16 2022-06-17 固特异轮胎和橡胶公司 具有改进的胎圈结构的轮胎
CN114633588A (zh) * 2020-12-16 2022-06-17 固特异轮胎和橡胶公司 带有改进胎圈结构的轮胎
EP4015253A1 (fr) * 2020-12-16 2022-06-22 The Goodyear Tire & Rubber Company Pneu ayant une structure de talon améliorée
EP4015254A1 (fr) * 2020-12-16 2022-06-22 The Goodyear Tire & Rubber Company Pneumatique à bourrelet perfectionné

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Publication number Publication date
JPWO2019240101A1 (ja) 2021-07-15
JP7177831B2 (ja) 2022-11-24

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