WO2020129970A1 - Pneu - Google Patents

Pneu Download PDF

Info

Publication number
WO2020129970A1
WO2020129970A1 PCT/JP2019/049375 JP2019049375W WO2020129970A1 WO 2020129970 A1 WO2020129970 A1 WO 2020129970A1 JP 2019049375 W JP2019049375 W JP 2019049375W WO 2020129970 A1 WO2020129970 A1 WO 2020129970A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
belt
cord
spiral
reinforcing
Prior art date
Application number
PCT/JP2019/049375
Other languages
English (en)
Japanese (ja)
Inventor
翔 福▲崎▼
俊雄 細田
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 WO2020129970A1 publication Critical patent/WO2020129970A1/fr

Links

Images

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
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • 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 tire, and particularly to a tire that can be suitably used for a high-performance four-wheeled vehicle.
  • a pneumatic tire for a four-wheeled vehicle such as a passenger car (hereinafter, abbreviated as a tire as appropriate), particularly a tire for a high-performance four-wheeled vehicle (including a racing vehicle), a tire having a pair of intersecting belt layers
  • a structure including a reinforcing belt (also referred to as a spiral belt) in which a reinforcing cord is wound along the tire circumferential direction is widely used on the outer side in the radial direction (see Patent Document 1).
  • the present invention has been made in view of such a situation, and an object thereof is to provide a tire in which the cornering force generated at a low slip angle is further enhanced while enhancing the high-speed durability.
  • One embodiment of the present invention is a tire (pneumatic tire 10) including at least a tread (tread 20) that comes into contact with a road surface, and a reinforcing belt (spiral belt 100) provided on the tire radial direction inner side of the tread,
  • the reinforcing belt has a reinforcing cord (spiral cord 111) wound so as to be substantially parallel to the tire circumferential direction, the tensile breaking strength of the reinforcing cord is 10 cN/dtex or more, The elongation at break is 13% or less.
  • FIG. 1 is a cross-sectional view of a pneumatic tire 10.
  • FIG. 2 is a top view (a tread surface view) showing a part of the carcass 40, the intersecting belt layer 50, and the spiral belt 100 of the pneumatic tire 10.
  • FIG. 3 is a partial perspective view of the spiral belt 100.
  • FIG. 1 is a sectional view of a pneumatic tire 10 according to the present embodiment. Specifically, FIG. 1 is a cross-sectional view of the pneumatic tire 10 taken along the tire width direction and the tire radial direction. Note that in FIG. 1, the cross-sectional hatching is partially omitted (the same applies hereinafter).
  • the tire equator line CL indicates the center of the pneumatic tire 10 in the tire width direction and the tire circumferential direction.
  • the pneumatic tire 10 includes a tread 20, a tire side portion 30, a carcass 40, a cross belt layer 50, a bead portion 60, and a spiral belt 100.
  • the pneumatic tire 10 is a pneumatic tire for four-wheeled vehicles such as passenger cars, and can be suitably used especially for high-performance four-wheeled vehicles (including racing vehicles).
  • Tread 20 is the part that contacts the road surface.
  • the tread 20 is formed with a pattern (not shown) according to the environment in which the pneumatic tire 10 is used and the type of vehicle to which the pneumatic tire 10 is mounted.
  • Tire side portion 30 is connected to the tread 20 and is located inside the tread 20 in the tire radial direction.
  • the tire side portion 30 is an area from the tire width direction outer end of the tread 20 to the upper end of the bead portion 60.
  • the tire side portion 30 is sometimes called a sidewall or the like.
  • the carcass 40 forms the skeleton of the pneumatic tire 10.
  • the carcass 40 has a radial structure in which carcass cords 41 (not shown in FIG. 1, see FIG. 2) radially arranged along the tire radial direction are covered with a rubber material.
  • the carcass 40 is not limited to the radial structure, and may have a bias structure in which the carcass cords 41 are arranged so as to intersect in the tire radial direction.
  • the interlaced belt layer 50 is provided inside the tread 20 in the tire radial direction.
  • the cross belt layer 50 is provided between the carcass 40 and the spiral belt 100.
  • the cross belt layer 50 is composed of a pair of cross belts, specifically, a cross belt 51 and a cross belt 52. That is, the intersecting belt layer 50 is provided inside the spiral belt 100 in the tire radial direction.
  • the cross belt 51 is in contact with the carcass 40 and is provided outside the carcass 40 in the tire radial direction.
  • the cross belt 52 contacts the cross belt 51 and is provided outside the cross belt 51 in the radial direction of the tire.
  • the bead portion 60 is connected to the tire side portion 30 and is located inside the tire side portion 30 in the tire radial direction.
  • the bead portion 60 has an annular shape, and the carcass 40 is folded back from the tire width direction inner side to the tire width direction outer side via the bead portion 60.
  • the spiral belt 100 is provided inside the tread 20 in the tire radial direction.
  • the spiral belt 100 constitutes a reinforcing belt.
  • the spiral belt 100 is provided in an area of 80% or more of the total width TW of the tread in the tire width direction. If possible, the spiral belt 100 may be provided in an area of 100% or more of the total width TW.
  • Width TW is based on the condition that the pneumatic tire 10 is assembled to an appropriate rim wheel, the pneumatic tire 10 is set to the regular internal pressure, and the pneumatic tire 10 is loaded with the regular load.
  • the regular internal pressure is the air pressure that corresponds to the maximum load capacity of the JATMA (Japan Automobile Tire Manufacturers Association) YearBook in Japan
  • the regular load is the maximum load capacity (maximum load) that corresponds to the maximum load capacity of the JATMA YearBook. ..
  • ETRTO in Europe, TRA in the US, and tire standards of other countries correspond.
  • FIG. 2 is a top view (a tread surface view) showing a part of the carcass 40, the intersecting belt layer 50, and the spiral belt 100 of the pneumatic tire 10.
  • the carcass 40 has a radial structure and has carcass cords 41 radially provided along the tire radial direction.
  • the carcass cord 41 can be formed by using an organic fiber such as nylon, like a tire for a general high-performance four-wheeled vehicle.
  • the cross belt 51 that forms the cross belt layer 50 is provided outside the carcass 40 in the tire radial direction.
  • the cross belt 51 has a belt cord 51a that is inclined with respect to the tire width direction.
  • the cross belt 52 that forms the cross belt layer 50 is provided outside the cross belt 51 in the tire radial direction.
  • the cross belt 52 also has a belt cord 52a inclined with respect to the tire width direction.
  • the belt cord 52a is inclined in the direction opposite to the belt cord 51a with the tire width direction as a reference (or the tire equator line CL may be used as a reference).
  • the angle ⁇ 1 formed by the belt cord 51a and the tire width direction is approximately 40 degrees.
  • the belt cord 52a is inclined in the opposite direction to the belt cord 51a, but the angle ⁇ 2 formed by the belt cord 52a and the tire width direction is also approximately 40 degrees.
  • Belt belt 51a and belt cord 52a are made of organic fiber or steel.
  • organic fibers for example, polyester or Kevlar can be used.
  • the spiral belt 100 has a spiral cord 111 wound so as to be substantially parallel to the tire circumferential direction.
  • the angle formed by the spiral cord 111 with the tire circumferential direction (tire equator line CL) is preferably ⁇ 10 degrees or less, and more preferably ⁇ 5 degrees or less.
  • the spiral cord 111 is made of organic fiber or steel.
  • the material of the spiral cord 111 and the material of the belt cord 51a and the belt cord 52a may be the same, but in consideration of the performance required for the pneumatic tire 10, it is preferable that they are different.
  • the spiral cord 111 preferably has higher strength than the belt cords 51a and 52a.
  • Kevlar can be used, for example.
  • the tensile breaking strength of the spiral cord 111 is preferably 10 cN/dtex or more.
  • the elongation at break of the spiral cord 111 is preferably 13% or less.
  • the tensile strength at break and elongation at break mean the values measured by the corresponding JIS measurement method.
  • the arrangement interval (may be referred to as arrangement density) of the spiral cords 111 in the tire width direction is 10 or more/cm.
  • FIG. 3 is a partial perspective view of the spiral belt 100.
  • the spiral belt 100 is composed of a plurality of cord units 110.
  • the spiral belt 100 is configured by winding a cord unit 110, in which a plurality of spiral cords 111 are arranged along the tire width direction, around the tire circumferential direction.
  • the cord unit 110 has two spiral cords 111 provided at intervals in the tire width direction.
  • Such a cord unit 110 may be called a double-strand winding (the number of spiral cords 111 included in the cord unit 110).
  • the size of the cord unit 110 in the tire width direction is preferably 4% or less of the total width TW of the tread 20 (see FIG. 1). It should be noted that the lower limit of the unit width W is not particularly limited, but considering the ease of manufacturing the cord unit 110 and the like, it is considered that the unit width W is actually 0.3% or more of the total width TW.
  • the spiral belt 100 configured by such a cord unit 110 may be called a mono spiral belt (MSB).
  • the spiral belt 100 is configured by winding a cord unit 110 having two spiral cords 111 a plurality of times in the tire circumferential direction.
  • the cord unit 110 is wound multiple times in the tire circumferential direction from one end in the tire width direction to the other end.
  • the spiral cord 111 is preferably twisted, although it depends on the material (organic fiber or steel). In the case of organic fibers (Kevlar), it is preferable that the fibers are twisted at about 4 to 5 times/cm.
  • the cross-sectional area of the cord unit 110 specifically, the product of the unit width W and the unit height H, the number of spiral cords 111 to be driven is preferably 2 /mm 2 or less.
  • the spiral belt 100 has a spiral cord 111 wound so as to be substantially parallel to the tire circumferential direction.
  • the tensile breaking strength of the spiral cord 111 is 10 cN/dtex or more.
  • the elongation at break of the spiral cord 111 is 13% or less.
  • the spiral belt 100 having the highly elastic spiral cord 111 effectively suppresses the pantograph deformation of the cross belt layer 50. Further, the spiral belt 100 effectively suppresses the deformation of the intersecting belt layer 50 in the tire circumferential direction and the specific deformation of the shoulder portion of the tread 20 when the lateral force is input to the pneumatic tire 10. That is, the shear rigidity inside the intersecting belt layer 50 is improved.
  • the tensile breaking strength of the spiral cord 111 is high and the elongation at break is low, the strain amount due to repeated compression and tension of the spiral belt 100 during high-speed rolling of the pneumatic tire 10 can be effectively suppressed. ..
  • the cornering force generated at a low slip angle can be further increased while improving the high-speed durability.
  • the spiral cord 111 is made of organic fiber such as Kevlar or steel.
  • the arrangement interval of the spiral cords 111 in the tire width direction is 10 cords/cm or more.
  • the spiral belt 100 is provided in an area of 80% or more of the total width TW of the tread 20 in the tire width direction.
  • the belt cord 51a and the belt cord 52a are made of organic fiber or steel. Therefore, pantograph deformation of the intersecting belt layer 50 can be further suppressed. Thereby, the high-speed durability of the pneumatic tire 10 and the cornering force at a low slip angle can be further enhanced.
  • the spiral belt 100 is configured by winding a cord unit 110, in which a plurality of spiral cords 111 are arranged along the tire width direction, around the tire circumferential direction. Therefore, since the cord unit 110 can be wound around the tire circumferential direction, the manufacturing of the spiral belt 100 becomes easy (time is shortened), and the strength required for the spiral belt 100 is easily secured.
  • the size of the cord unit 110 in the tire width direction is 4% or less of the total width TW of the tread 20. Therefore, the cord unit 110 follows the shape of the tread 20 whose cross-sectional shape is rounded in a crown shape. Thereby, the same performance can be exhibited regardless of the part of the tread 20. That is, the high-speed durability of the pneumatic tire 10 and the cornering force at a low slip angle can be further enhanced.
  • the cord unit 110 has two windings (two spiral cords 111), but the number of spiral cords 111 included in the cord unit 110 may be slightly increased.
  • the spiral belt 100 may be configured by winding one rubber-coated spiral cord 111 along the tire circumferential direction without using the cord unit 110.
  • spiral belt 100 and the spiral cord 111 may be called a circumferential belt and a circumferential cord.
  • the pneumatic tire 10 is a pneumatic tire for four-wheeled vehicles such as passenger cars, and is described as being particularly suitable for high-performance four-wheeled vehicles (including racing vehicles).
  • the pneumatic tire 10 may be used for general passenger cars and is not limited to four-wheeled cars, but may be widely used for vehicles that corner by utilizing slip angles.

Landscapes

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

Abstract

La présente invention concerne un pneumatique (10) qui est pourvu d'une courroie en spirale (100). La courroie en spirale (100) comprend un câble en spirale (111) qui est enroulé sensiblement parallèlement à la direction circonférentielle du pneu. Le câble en spirale (111) présente une résistance à la rupture par traction non inférieure à 10 cN/dtex et un allongement à la rupture ne dépassant pas 13 %.
PCT/JP2019/049375 2018-12-17 2019-12-17 Pneu WO2020129970A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-235203 2018-12-17
JP2018235203A JP2020097261A (ja) 2018-12-17 2018-12-17 タイヤ

Publications (1)

Publication Number Publication Date
WO2020129970A1 true WO2020129970A1 (fr) 2020-06-25

Family

ID=71100380

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/049375 WO2020129970A1 (fr) 2018-12-17 2019-12-17 Pneu

Country Status (2)

Country Link
JP (1) JP2020097261A (fr)
WO (1) WO2020129970A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09207516A (ja) * 1996-02-09 1997-08-12 Bridgestone Corp ラジアルタイヤ
JP2003011614A (ja) * 2001-07-03 2003-01-15 Bridgestone Corp 二輪車用タイヤ
WO2003061991A1 (fr) * 2002-01-24 2003-07-31 Bridgestone Corporation Pneu radial et procede de production
JP2008080993A (ja) * 2006-09-28 2008-04-10 Bridgestone Corp 空気入りタイヤ
JP2008195148A (ja) * 2007-02-09 2008-08-28 Bridgestone Corp 空気入りタイヤ
WO2011065018A1 (fr) * 2009-11-26 2011-06-03 株式会社ブリヂストン Pneumatique
JP2013166471A (ja) * 2012-02-15 2013-08-29 Bridgestone Corp 二輪車用空気入りタイヤ
WO2015045728A1 (fr) * 2013-09-30 2015-04-02 コニカミノルタ株式会社 Unité d'objectif et dispositif d'imagerie
JP2018164967A (ja) * 2017-03-28 2018-10-25 艶金化学繊維株式会社 作業ロボット用耐熱性保護カバー

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4318419B2 (ja) * 2001-12-18 2009-08-26 住友ゴム工業株式会社 空気入りラジアルタイヤ
JP5353275B2 (ja) * 2009-02-03 2013-11-27 横浜ゴム株式会社 空気入りラジアルタイヤ
JP2013164967A (ja) * 2012-02-10 2013-08-22 Hitachi Maxell Ltd 角形二次電池
DE102014216260A1 (de) * 2014-08-15 2016-02-18 Continental Reifen Deutschland Gmbh Hybridkord zur Verwendung als Festigkeitsträger in einer Gürtelbandage eines Fahrzeugluftreifens
JP6911513B2 (ja) * 2017-05-17 2021-07-28 住友ゴム工業株式会社 空気入りタイヤ

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09207516A (ja) * 1996-02-09 1997-08-12 Bridgestone Corp ラジアルタイヤ
JP2003011614A (ja) * 2001-07-03 2003-01-15 Bridgestone Corp 二輪車用タイヤ
WO2003061991A1 (fr) * 2002-01-24 2003-07-31 Bridgestone Corporation Pneu radial et procede de production
JP2008080993A (ja) * 2006-09-28 2008-04-10 Bridgestone Corp 空気入りタイヤ
JP2008195148A (ja) * 2007-02-09 2008-08-28 Bridgestone Corp 空気入りタイヤ
WO2011065018A1 (fr) * 2009-11-26 2011-06-03 株式会社ブリヂストン Pneumatique
JP2013166471A (ja) * 2012-02-15 2013-08-29 Bridgestone Corp 二輪車用空気入りタイヤ
WO2015045728A1 (fr) * 2013-09-30 2015-04-02 コニカミノルタ株式会社 Unité d'objectif et dispositif d'imagerie
JP2018164967A (ja) * 2017-03-28 2018-10-25 艶金化学繊維株式会社 作業ロボット用耐熱性保護カバー

Also Published As

Publication number Publication date
JP2020097261A (ja) 2020-06-25

Similar Documents

Publication Publication Date Title
JP5756486B2 (ja) 空気入りタイヤ
JP5841383B2 (ja) 空気入りタイヤ
JP5075688B2 (ja) 自動二輪車用タイヤ
JP5399535B2 (ja) 二輪自動車用タイヤ
CN105452017B (zh) 充气轮胎
JP4377934B2 (ja) 空気入りタイヤ
WO2020129971A1 (fr) Pneumatique
WO2020129970A1 (fr) Pneu
JP5089259B2 (ja) 自動二輪車用空気入りタイヤ
JP4528240B2 (ja) 自動二輪車用タイヤ
JP5680881B2 (ja) 空気入りタイヤ
JP4675710B2 (ja) 自動二輪車用タイヤ
JP4980010B2 (ja) 空気入りタイヤ
JP5350749B2 (ja) 二輪自動車用タイヤ対
JP5522708B2 (ja) 空気入りタイヤ
JP2008302871A (ja) 自動二輪車用空気入りタイヤ
JP5541614B2 (ja) 空気入りタイヤ
JP2012228995A (ja) 自動二輪車用空気入りタイヤ
WO2022270067A1 (fr) Pneu
JP4570979B2 (ja) ラグ付き農業用タイヤ
JP6729107B2 (ja) 空気入りタイヤ
JP6346813B2 (ja) 二輪自動車用タイヤ
JP6529127B2 (ja) 空気入りタイヤ
JP2006168395A (ja) 二輪車用ラジアルタイヤ
JP2010126128A (ja) 二輪自動車用空気入りタイヤ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19898204

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19898204

Country of ref document: EP

Kind code of ref document: A1