公开(公告)号：JPS619314A

公开(公告)日：1986-01-16

申请号：JP13016184

申请日：1984-06-26

Applicant: Bridgestone Corp

Inventor： TANAKA MAKOTO ,  MIYAMOTO KENJI ,  URA YASUYUKI

IPC: B60C9/18 ,  B60C9/20 ,  B60C9/22 ,  B60C9/28

CPC classification number: B60C9/28 ,  B60C9/2006 ,  B60C9/22

Abstract: PURPOSE: To improve durability, resistance to deviating wear, and straight running ability, by a method wherein, in a titled tyre for street car, an auxiliary belt layer formed by cord of a high inclination angle is disposed to the inner side of a main belt layer formed by a spiral cord of a low lead angle to constitute a belt.
CONSTITUTION: A belt layer B is formed with a main belt layer B
1 which is formed by a spiral metallic cord, being substantially parallel to the peripheral direction of a tyre and has width being 0.7W1.2 times as wide as that of a tread, and an auxiliary belt layer B
2 which is formed by a cord being at the inner side in a radial direction and having an inclination angle of 40W85°C with the peripheral direction of the tyre, and has width being 0.6W1.3 times as wide as that of the main belt layer B
1 . This constitution improves resistance to separation of a belt end, durability, resistance to deviating wear, and straight running ability, and enables a decrease in rolling resistance.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：为了提高耐久性，耐偏差耐磨性和直线行驶能力，通过以下方法，在道路车用轮胎中，将由高倾斜角度的帘线形成的辅助带束层设置在主体的内侧 带层由低导程角的螺旋线形成，构成皮带。 构成：带束层B形成有主带层B1，其由螺旋状金属帘线形成，大致平行于轮胎周向，宽度为胎面宽度的0.7-1.2倍， 辅助带束层B2由沿着径向内侧的帘线与轮胎周向倾斜40-85℃的帘线形成，宽度为宽度的0.6-1.3倍 如主带束层B1的那样。 这种结构提高了对带端部的分离性，耐久性，耐偏差磨损和直线行驶能力的阻力，并且能够降低滚动阻力。

公开(公告)号：JPS5977907A

公开(公告)日：1984-05-04

申请号：JP18782382

申请日：1982-10-26

Applicant: Bridgestone Corp

Inventor： TANAKA MAKOTO ,  MIYAMOTO KENJI ,  MAKINO SHIGEO ,  URA YASUYUKI

IPC: B60C11/04 ,  B60C11/03 ,  B61D1/00 ,  B61F13/00 ,  B60C11/06

CPC classification number: B60C11/042 ,  B60C11/0309 ,  B60C11/045 ,  B60C2011/0353 ,  B60C2011/0383

Abstract: PURPOSE:To prevent the cracking of the groove bottom by a method in which the maximum groove half-width portion of the main groove of a tire with zig- zagged main groove for underway, etc., is made up of given inside and outside portions, and the depth of the inside groove is set up to more than a given % of the depth of the main groove. CONSTITUTION:Main groove 1 is made up of a zigzagged outside groove 1' along the circumferential direction of tire and an inside groove 1'' in parallel with the circumferential direction of tire. The maximum groove half-width W0 of the step face of the outside groove portion 1' is set to 1-7.5% range of the tread width W, and the maximum groove half-width W1 of the step face of the inside groove portion 1'' is set to 27-67% of the width W. The depth of the inside groove portion 1'' is set to 5% or more of that of the main groove. The swing width S of the zigzagged edge R and pitch P are each set to 10-80% and 20-180% in relation to the half-width W0 of the outside groove. The cracking of the groove bottom can thus be effectively prevented without damaging the railway abrasion prevention effect.

Abstract translation: 目的：为了防止槽底的破裂，其中具有用于正在进行的具有锯齿形主槽的轮胎的主槽的最大槽半宽度部分由给定的内部和外部部分 并且内侧槽的深度设定为大于主槽的深度的给定百分比。 构成：主槽1由轮胎周向的锯齿状的外槽1'和与轮胎的周向平行的内侧槽1“构成。 外槽部1'的台阶面的最大槽半宽W0设定为胎面宽度W的1-7.5％的范围，内侧槽部1的台阶面的最大槽半宽度W1 “被设定为宽度W的27-67％。内侧槽部1”的深度设定为主槽的5％以上。 曲折边缘R和间距P的摆幅宽度S相对于外槽的半宽W0分别设定为10-80％和20-180％。 因此可以有效地防止槽底的龟裂，而不损害铁路的防磨损效果。

公开(公告)号：JP2006273124A

公开(公告)日：2006-10-12

申请号：JP2005095504

申请日：2005-03-29

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： TANAKA MAKOTO

IPC: B60C9/20 ,  B60C9/18 ,  B60C11/12

Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire suppressing generation of a ply steer, and also generation of crack from the bottom of a sipe.
SOLUTION: The pneumatic tire 10 comprises a carcass 14 laid in a toroidal shape over a pair of bead cores 12, a plurality of waved belt layers 15 arranged outside in a tire diameter direction of the carcass 14, and a tread portion 16 arranged outside in the tire diameter direction of the waved belt layer 15, and equipped with a land part 17 divided by at least two main grooves 13 extending in a tire circumferential direction. The waved belt layer 15 is a belt layer made from a plurality of cords 20 extending while meandering in the tire circumferential direction. A plurality of sipes 18 is formed on the land part 17 of the tread portion 16. The sipes 18 extend at an angle θ in a range of 0°±5° in regard to a tire width direction. Therefore, the whole of the sipes almost simultaneously steps into a ground surface.
COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供抑制帘布层转向器的产生的充气轮胎，以及从刀槽花纹的底部产生裂纹。 解决方案：充气轮胎10包括在一对胎圈芯12上成环状地形成的胎体14，布置在胎体14的轮胎直径方向外侧的多个波纹带束层15，以及胎面部16 布置在波纹带层15的轮胎直径方向的外侧，并且配备有由轮胎周向延伸的至少两个主槽13分割的陆部17。 波纹带层15是由在轮胎周向上蜿蜒而延伸的多根帘线20制成的带束层。 多个刀槽花纹18形成在胎面部16的陆部17上。刀槽花纹18相对于轮胎宽度方向以0°±5°的角度θ延伸。 因此，整个刀槽花纹几乎同时进入地面。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2002234311A

公开(公告)日：2002-08-20

申请号：JP2001029455

申请日：2001-02-06

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO

IPC: B60C9/20 ,  B60C9/18 ,  B60C11/12

Abstract: PROBLEM TO BE SOLVED: To provide a tire that can reduce a value of corning power characteristics and thus suppress a degradation in the life of the tire and a road surface for a guide wheel, and can suppress generation of a crack from the bottom of a sipe. SOLUTION: The tire has a carcass 2 toroidally astride between a pair of bead cores 3, a waved belt layer 5 comprising a plurality of cords 5A meanderingly extending along a tire circumference, and a tread 6 disposed outside the waved belt layer 5 along a tire radius. No cords are present between the carcass 2 and the waved belt layer 5, and the waved belt layer 5 has two or more layers.

公开(公告)号：JPH11254914A

公开(公告)日：1999-09-21

申请号：JP6318498

申请日：1998-03-13

Applicant: BRIDGESTONE CORP ,  SAPPORO CITY

Inventor： TANAKA MAKOTO

IPC: B60C9/08 ,  B60C11/04 ,  B60C11/13

Abstract: PROBLEM TO BE SOLVED: To provide a radial tire for a heavy load and track travel with a tread abrasion quantity measuring means, capable of preventing the uneven abrasion occurrence without impairing various tire performance. SOLUTION: In a radial tire for heavy weight and track travel having a compression of 80% or less equipped with: a pair of bead parts, a carcass in ranging in a troidal state with the bead parts, and a tread 1 arranged in the crown part of the carcass; rectilinear grooves 2 are arranged one by one in a peripheral direction respectively in a right and left pair of regions from both the ends of the tread 1 to a tread width of 25-10%.

公开(公告)号：JPH1148714A

公开(公告)日：1999-02-23

申请号：JP20572397

申请日：1997-07-31

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO

IPC: B60C11/01 ,  B29C33/02 ,  B29L30/00 ,  B60C11/12

Abstract: PROBLEM TO BE SOLVED: To sufficiently eliminate the generation of crack in a groove bottom of a narrow groove by providing a narrow groove in a shoulder rib, and interrupting this narrow groove at a part corresponding to a position of sector type laminated surface in the tread circumferential direction over a specified length in the tread circumferential direction. SOLUTION: A shoulder rib 3 is partitioned in a tread side end part by a circumferential main groove 2 continuously extended straight in the tread circumferential direction, and the shoulder rib 3 is provided with a narrow groove 4 extended straight in the tread circumferential direction. This narrow groove 4 is interrupted at plural parts in the tread circumferential direction corresponding to the position of sector type laminated surfaces over the length of 2-15 mm in the tread circumferential direction. Consequently, the narrow groove 4 is formed of plural narrow groove parts 4a aligned in the tread circumferential direction with plural interruption positions 5 as a whole. Generation of crack causing the generation of crack of the groove bottom of the narrow groove 4 is prevented.

公开(公告)号：JPH0948212A

公开(公告)日：1997-02-18

申请号：JP20105595

申请日：1995-08-07

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO

IPC: B60C9/18 ,  B60C9/20

Abstract: PROBLEM TO BE SOLVED: To lighten strain generated on the end parts of a belt so as to deal with large input over customary input. SOLUTION: A second belt layer 20 and a third belt layer 22 are crossingly laminated so that mutual steel cords 24 are slanted in the opposite direction while pinching a tire equatorial plane CL between. In the steel cord 24 of the third belt layer 22, the slanting angle against the tire equatorial plane CL are larger at both end parts in the tire width direction than that on the tire equatorial plane CL side, and the cord intervals are widened on both end parts in the tire width direction. Rubber between belt layers of 50% extension modulus 15-25kg/cm is arranged between the second belt layer 20 and the third belt layer 22 at between both end parts in the tire width direction. Hereby, strain generated in the vicinity of the end part of the third belt layer is lightened so as to prevent a crack from generating, and the tire can deal with large input over customary input.

公开(公告)号：JPH08142610A

公开(公告)日：1996-06-04

申请号：JP28766894

申请日：1994-11-22

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO

IPC: B60C9/18 ,  B60C11/04 ,  B60C11/12

Abstract: PURPOSE: To sufficiently suppress the irregular wear by respectively providing shoulder small grooves extending parallel to the main grooves between a side edge small groove of a shoulder land part and a tread end, and forming a shoulder rib between the shoulder small groove and the tread end, and a side edge rib between the main groove and the side small groove. CONSTITUTION: A tread 5 is provided with a center land part 71 to be demarcated by a plurality of zigzag circumferential main grooves 6 and right and left shoulder land parts 72 . The tread 5 is respectively provided with a pair of circumferential side edge small grooves 8 extending in parallel to a main groove 6 close to the shoulder and the center land parts 72 , 71 , and a shoulder small groove 9 extending in parallel to the main groove 6 in the middle between the tread ends E of the side edge small grooves 8 of the shoulder land part 72 , and a shoulder rib 10 is formed between the shoulder small groove 9 and the tread end E, and a side edge rib 11 is formed between the main groove 6 and the side edge small groove 8 respectively. Generation of the irregular wear (river wear) can be favorably reduced.

公开(公告)号：JPH06127210A

公开(公告)日：1994-05-10

申请号：JP27443192

申请日：1992-10-13

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO

IPC: B60C9/08 ,  B60C9/20

Abstract: PURPOSE:To prevent separation from an innermost belt layer end by preventing the end of the innermost belt layer from dangling. CONSTITUTION:A tire radial outer side of a cushion rubber 24 is located along the extension line extending to the tire lateral outer side of a first belt layer 2, and a shoulder side corner 24A of the cushion rubber 24 and the end 20A of a first belt layer 20 are separated 4mm to 15mm from each other. The end 20A is covered with a belt end cover rubber 32. Even if some error is produced at the sticking position of the first belt layer 20, the end 20A of the first belt layer 20 does not go down beyond the shoulder side corner 24A of the cushion rubber 24, and any large distortion is not produced at the end 20A of the first belt layer 20 during the rolling under load to prevent separation from the end 20A of the first belt layer 20 from occurring.

公开(公告)号：JPH05201201A

公开(公告)日：1993-08-10

申请号：JP1399092

申请日：1992-01-29

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO ,  YAGAWA KAZUO

IPC: B60C1/00 ,  B60C11/00 ,  B60C11/04

Abstract: PURPOSE:To prevent a rubber tire from catching fire or burning without losing abrasion resistance, partial abrasion resistance and crack resistance by forming an outer surface part of a circumferential main groove by flame resistance rubber composition with a specific value of oxygen index and not by providing a see-through part which continues in the straight line state in the tire circumferential direction in a groove space of the circumferential main groove CONSTITUTION:This flame resistant rubber tire is provided with a tread rubber layer 12 in which a plurality of circumferential grooves 20 extending in the zigzag state in the tire circumferential direction are formed, an outer surface rubber part 11 formed by a side rubber layer 13 continuing to both ends in the tire width direction of the tread rubber layer 12 and extending close to a bead part 18 toward the tire radial direction, and a reinforced part inside the outer surface rubber part 11. The outer surface part of the circumferential main groove 20 is formed by a flame-resistant rubber composition whose oxygen index is within the range from 19.8 to 27.5, and a groove space of the circumferential main groove 20 does not have a see-through part continuing in the straight line state in the tire circumferential direction. Also, a wall angle part on the groove side of a bent part 20A of the circumferential main grooves 20 are connected smoothly by a curve with the radius of curvature of 5mm or more.