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公开(公告)号：JPH03227702A
公开(公告)日：1991-10-08
申请号：JP1899690
申请日：1990-01-31
Applicant: BRIDGESTONE CORP
Inventor： MATSUSHITA NORINAGA
Abstract: PURPOSE:To reduce the deflection at a belt side end part, prevent peeling, etc., of the belt-side end part, and improve the durability of a tire by setting the width of a belt or the like to be a tread width or less, and embedding it radially inside a carcass. CONSTITUTION:A tire is composed of a carcass 2 wind-folded back around a pair of bead cores 1 at both side end parts, a belt 4 consisting of a plurality of belt layers 3, and a tread part 6 for forming a tread surface 5. In this case, the width of the belt 4 is set to be a tread width or less, and it is disposed radially inside a crown part of the carcass 2. The external force acting on the tread part 6 is damped by the tread rubber and carcass 2 respectively and transmitted to the belt 4. The deflection at the side end parts of the belt 4 is thus reduced to prevent troubles such as peeling at the side end parts, thereby the durability of the belt 4 is improved.
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公开(公告)号：JP2015042456A
公开(公告)日：2015-03-05
申请号：JP2013174239
申请日：2013-08-26
Applicant: 株式会社ブリヂストン , Bridgestone Corp
Inventor： MATSUSHITA NORINAGA
IPC: B29D30/06
Abstract: 【課題】小型、安価でありながら帯状部材Rに対し高能率で安全にV溝21を形成する。【解決手段】外径が軸方向中央部から軸方向両外側に向かうに従い小径となった形成ローラ35を転動させることで、帯状部材RにV溝21を形成しているため、形成ローラ35に付与する力は小さな値で十分であり、帯状部材Rとの接触面積も狭いものとなる。また、形成ローラ35の帯状部材Rに対する付着部位は水平方向成分を含む円弧を描きながら移動するため、形成ローラ35は帯状部材Rから強力に剥離される。この結果、形成ローラ35と帯状部材Rとの付着を剥離する作業は不要となり、帯状部材Rに対し高能率で安全にV溝21を形成することができる。【選択図】図2
Abstract translation: 要解决的问题：即使装置紧凑且便宜，也可以安全且高效率地将条形部件R形成为V形槽21.解决方案：由于V形槽21通过旋转地层 具有从轴向中心部分到轴向两端的外径变小的辊35，足够的力被施加到形成辊35和形成辊之间的接触区域 35，带状构件R窄。 此外，由于形成辊35的沉积部分与带状部件R同时拉伸包括水平分量的电弧，所以形成辊35从带状部件R强烈地剥离。因此， 形成辊35和带状构件R变得不必要，并且V形槽21可以安全地且高效率地形成在带状构件R上。
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公开(公告)号：JP2014148086A
公开(公告)日：2014-08-21
申请号：JP2013017838
申请日：2013-01-31
Applicant: Bridgestone Corp , 株式会社ブリヂストン
Inventor： MATSUSHITA NORINAGA
IPC: B29D30/30
Abstract: PROBLEM TO BE SOLVED: To provide a tire capable of further increasing durability of a toe of bead by suppressing the occurrence of a failure in a folded part of a carcass ply, when a green case has a diameter enlarged in a tire molding step.SOLUTION: In a tire molding step, when a force for bonding a carcass ply and a wire chafer material together is adjusted for enlargement of a diameter of a green case before the wire chafer material is bonded, a cord of a folded part of the carcass ply is restrained from following a change in the cord direction of the wire chafer material.
Abstract translation: 要解决的问题：为了提供一种能够通过抑制胎体帘布层的折叠部的故障的发生而进一步提高胎圈的趾部的耐久性的轮胎，因此在轮胎成形工序中，在绿色外壳的直径增大的情况下， ：在轮胎成型工序中，在将胎圈帘布布材料接合之前调整用于将胎体帘布层和线胎圈包布材料接合的力用于放大绿色壳体的直径的情况下，将胎体帘布层的折叠部分的帘线 被阻止跟随电线胎圈包布材料的帘线方向的变化。
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公开(公告)号：JP2006347063A
公开(公告)日：2006-12-28
申请号：JP2005177810
申请日：2005-06-17
Applicant: BRIDGESTONE CORP
Inventor： MATSUSHITA NORINAGA
Abstract: PROBLEM TO BE SOLVED: To obtain a proper bead back-surface gauge of a pneumatic tire without increasing the size of a rubber chafer gauge of a green tire. SOLUTION: The manufacturing method of the pneumatic tire comprises the steps of extruding at least two kinds of rubber having different hardness or chafer rubber and sidewall rubber so that the extruded rubber partly overlap each other; half-vulcanizing the extruded rubber except a predetermined width (at least 2 mm) from the edge portion 16c where the rubber chafer 16 having bigger hardness does not overlap the sidewall rubber 18 by projecting an electron ray to the whole surface of the rubber chafer 16; pasting the half-vulcanized rubber chafer 16 and the sidewall rubber 18 on a shaping drum to make a green tire; and vulcanizing the green tire. COPYRIGHT: (C)2007,JPO&INPIT
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公开(公告)号：JP2014117924A
公开(公告)日：2014-06-30
申请号：JP2012276547
申请日：2012-12-19
Applicant: Bridgestone Corp , 株式会社ブリヂストン
Inventor： KAWAI TOSHIYUKI , MATSUSHITA NORINAGA
Abstract: PROBLEM TO BE SOLVED: To provide a mold for tire vulcanization giving a tire with flash rubber formed in a lug groove reduced and a tire production method.SOLUTION: A mold for tire vulcanization includes a pair of side molds 3 profiling mainly a side wall part of a tire and a sector mold 5 arranged between the pair of side molds 3 and profiling mainly a tread part of the tire. The sector mold 5 becomes ring-shaped as a whole on mold closing, consists of a plurality of arc-shaped segments 5a divided in the circumferential direction and a protrusion 7 for formation of a lug groove extending from the sector mold 5 to the side mold 3 on mold closing and divided at a parting position. Between the divided end surfaces 9 of the protrusion 7 for formation of a lug groove, one divided end surface 9 is formed with a concave part 13, and the other divided end surface 9 is formed with a convex part 11. The concave part 13 and the convex part 11 are engaged mutually on mold closing.
Abstract translation: 要解决的问题：提供一种用于轮胎硫化的模具，该轮胎具有形成在减小的横向花纹沟中的闪光橡胶的轮胎和轮胎生产方法。解决方案：一种用于轮胎硫化的模具包括一对侧模3，其主要以侧壁部分 的轮胎和扇形模具5，其布置在所述一对侧模具3之间，并且主要对轮胎的胎面部分进行成形。 扇形模具5在闭合时整体呈环形，由沿圆周方向分割的多个弧形段5a和从扇形模具5延伸到侧模的横向花纹槽形成的突起7组成 3在模具闭合处并在分离位置分割。 在用于形成横向花纹沟的突起7的分开的端面9之间形成有一个分开的端面9，其具有凹部13，另一个分割端面9形成有凸部11.凹部13和 凸部11在模具闭合时相互接合。
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Patent Agency Ranking
公开(公告)号：JPH09226319A
公开(公告)日：1997-09-02
申请号：JP33411396
申请日：1996-12-13
Applicant: BRIDGESTONE CORP
Inventor： MATSUSHITA NORINAGA , TERADA KOJI
Abstract: PROBLEM TO BE SOLVED: To prevent upper and lower cords from closely adhering to each other at the time of vulcanization by forming a reinforcing layer disposed between two layers of spiral cord layers by a fiber/rubber complex of one layer or more, in which fibers, the diameter or the maximum diameter and length of which are limited to a specified range are united in a body by a rubber layer. SOLUTION: A belt 5 comprises two, upper and lower layers of spiral cords 6, 6 formed by winding a rubber coated cord made by burying a one-wire organic fiber cord in coating rubber spirally at an angle along the circumferential direction of a tire in such a manner as to sequentially shift in the axial direction of the tire, and a reinforcing layer 7 formed by one layer of non-woven/rubber complex (fiber/rubber complex) disposed between the above cord. The diameter or the maximum diameter of a fiber is 0.1-100μm, preferably 0.1-50μm. As the length of the fiber, 8mm or more is required, preferably 10mm or more. Accordingly, two layers of spiral cords can be prevented from being pressed and made closely adhere to each other at the time of vulcanization so as to prevent lowering of durability.
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公开(公告)号：JPH09109615A
公开(公告)日：1997-04-28
申请号：JP27540895
申请日：1995-10-24
Applicant: BRIDGESTONE CORP
Inventor： KAJIMOTO KATSUHIKO , MATSUSHITA NORINAGA
IPC: B60C11/04 , B60C11/11 , B60C11/113 , B60C11/12
Abstract: PROBLEM TO BE SOLVED: To improve various performance by gradually decreasing the inclina tion in relation to the tread periphery of a curved line connecting the width centers of a first main groove and a second main groove at the specified posi tion in the specified range, making the block edge and the sipe edge into the length in the specified range, and setting the negative ratio of the tread and the specified % modulus of the tread rubber into the specified range. SOLUTION: The inclinations θ1 , θ2 in relation to the tread circumference, of curved lines connecting respective width centers of first main grooves 2 and second main grooves 3 are gradually decreased from respective ends to the tread width center in the range of 90 to 40 deg., and they are gradually decreased from the tread width center to the vicinities of respective edges in the range of 50 to 10 deg.. The edges of blocks B1 , B2 and the edges of sipes S are formed into the length three to ten times on the equatorial plane and five to fifteen times on the meridian section by the magnification corresponding to the block arrangement pitch length of the total length projected to the tire equatorial plane and the tire meridian section. The negative ratio of a tread 1 is in the range of 35 to 45%, and the 300% modulus of the tread rubber is in the range of 40 to 110kgf/cm .
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公开(公告)号：JPH05286306A
公开(公告)日：1993-11-02
申请号：JP9310992
申请日：1992-04-13
Applicant: BRIDGESTONE CORP
Inventor： MATSUSHITA NORINAGA
Abstract: PURPOSE:To prevent the generation of groove bottom cracks of branch grooves and inclination lug grooves provided at spheres that exceed the specific ratio of the maximum width of a periphery tread. CONSTITUTION:A sphere SW where the 1st belt ply 22 and the 2nd belt ply 24 of a pneumatic radial tire 10 for a two wheeler accumulate, is made to be upto the 65% of the maximum width TW of a periphery tread. Layer belts 25 are arranged at the radial outer parts of both side end portions of the 1st belt ply 22, and a layer belt 25 is made to be a width QW that is from the position of the 60% of the maximum width TW of the periphery tread to the side end edge of the 1st belt ply 22. The directions of the cords 25A of the layer belts 25 and inclination lug grooves 27, 29 and branch grooves 28 are made to be directions that cross each other, and the crossing angles of the inclination lug grooves 27, 29 and branch grooves 28 and the cords 25A of the layer belts 25 are made to be 45 deg.-90 deg..
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公开(公告)号：JP2001138707A
公开(公告)日：2001-05-22
申请号：JP32739599
申请日：1999-11-17
Applicant: BRIDGESTONE CORP
Inventor： MATSUSHITA NORINAGA
Abstract: PROBLEM TO BE SOLVED: To provide a pnuematic tire capable of simultaneously providing controllability and gap absorbance. SOLUTION: An angle θc of a carcass cord 16 in a region 26 of one-third of a tread width TW is set in a range of 60 deg.-90 deg., an angle θs of the carcass cord 16 in an inner region 28 inside of the tire radius direction from a carcass maximum width position P is set in a range of 50 deg.-70 deg., and θc-θs is set in a range of 10 deg.-30 deg.. In an overlaying part between a body part 14A and a winding part 14B of a carcass ply 14, the carcass cord 16 forms a kind of cross structure (bias structure), and a transverse spring constant (transverse rigidity) for contributing improvement of the controllability can be increased without providing a reinforcement for a side part 30. Since the reinforcement is not provided for the side part 30, increase of a longitudinal spring constant (longitudinal rigidity) is suppressed, and the gap absorbance does not decrease.
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公开(公告)号：JPH0781311A
公开(公告)日：1995-03-28
申请号：JP15732494
申请日：1994-07-08
Applicant: BRIDGESTONE CORP
Inventor： OKA TAKESHI , MATSUSHITA NORINAGA
Abstract: PURPOSE:To provide a pneumatic tire, in which rigidity of side parts can be improved without adding a new reinforcing member and the flexibility is also provided in the side parts. CONSTITUTION:A pneumatic tire has at least one reinforcing layer 9 along the periphery of a carcass 7, which is formed by folding a small number of plies 3 of rubber-coated cord layer from the inside of a bead core 4 and a filler rubber 5 to the outside thereof so as to be overlapped with each other at a crown part 6. This reinforcing layer 9 is made of rubber-coated cord layer spirally wound, practically, arranged in parallel with a flat surface, which includes the circumference of a tire.
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