KR20040029607A - Pneumatic tire having improved bead durability - Google Patents

Pneumatic tire having improved bead durability Download PDF

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Publication number
KR20040029607A
KR20040029607A KR1020020059914A KR20020059914A KR20040029607A KR 20040029607 A KR20040029607 A KR 20040029607A KR 1020020059914 A KR1020020059914 A KR 1020020059914A KR 20020059914 A KR20020059914 A KR 20020059914A KR 20040029607 A KR20040029607 A KR 20040029607A
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KR
South Korea
Prior art keywords
bead
reinforcing material
carcass
durability
pneumatic tire
Prior art date
Application number
KR1020020059914A
Other languages
Korean (ko)
Inventor
공수길
Original Assignee
한국타이어 주식회사
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Publication date
Application filed by 한국타이어 주식회사 filed Critical 한국타이어 주식회사
Priority to KR1020020059914A priority Critical patent/KR20040029607A/en
Publication of KR20040029607A publication Critical patent/KR20040029607A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C15/0628Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/0042Reinforcements made of synthetic materials

Abstract

PURPOSE: A pneumatic tire for heavy load is provided to improve bead durability by increasing the durability of a bead part through installation two sheets of nylon reinforcing members with the same elasticity to the bead part while suppressing deformation of the bead part caused by the installation of the nylon reinforcing members. CONSTITUTION: A pneumatic tire for heavy load comprises a tread, a side wall, and a bead part(3). The end portion of a carcass(10) is turned up at a bead core(30) of the bead part. A reinforcing member(4) is installed outside the turned-up carcass. The reinforcing member is formed of two sheets of nylon reinforcing members(41,42). One end of the first reinforcing member directly contacting with the carcass is installed at a position of covering the bead core. One end of the second reinforcing member installed outside the first reinforcing member is installed at a position off the lower part of the bead core.

Description

비드내구성을 향상시킨 중하중용 공기입 타이어{Pneumatic tire having improved bead durability}Pneumatic tire having improved bead durability

본 발명은 비드내구성을 향상시킨 중하중용 공기입 타이어에 관한 것으로, 더욱 상세하게는 비드부에 2매의 나이론 보강재를 사용하여 비드부의 내구성을 증대시키면서도, 2매의 나이론 보강재 설치로 인한 비드부의 변형을 억제시킬 수 있게 하므로서 비드 내구성을 향상시킬 수 있게 한 중하중용 공기입 타이어 에 관한 것이다.The present invention relates to a heavy-duty pneumatic tire with improved bead durability, and more particularly, by using two nylon reinforcements in the bead portion, while increasing the durability of the bead portion, deformation of the bead portion due to the installation of two nylon reinforcements The present invention relates to a heavy-duty pneumatic tire that can improve the bead durability while reducing the pressure.

일반적으로 중하중용 타이어에 있어서 품질에 가장 중요한 요소는 내구성과 내마모성이며 이중에서도 정작 중요한 요소는 내구성으로서, 내구성은 다시 벨트부 내구성과 비드부 내구성을 크게 나누어지는 바, 통상 벨트부 내구성 보다 비드부 내구성이 더욱 중요시된다.In general, the most important factor for quality of heavy-duty tires is durability and wear resistance, and the most important factor is durability, and durability is divided into belt part durability and bead part durability. This becomes even more important.

이는 비드부의 내구성 저조로 인한 사고발생시 나타나는 피해정도가 벨트부 내구성 저조로서 나타나는 피해 정도 보다 과중하기 때문이며, 이러한 이유로서 비드부의 내구성을 높이거나 혹은 내구성을 저하시키지 않으면서 슬림화시키는 노력이 활발하게 진행되어 왔다.This is because the degree of damage caused by an accident due to low durability of the bead portion is heavier than the degree of damage caused by low durability of the belt portion. For this reason, efforts to slim the bead portion without increasing or decreasing durability of the bead portion are actively progressed. come.

소경성형에 있어서 기존의 비드부 나일론 보강재의 부착은 카카스와 기타의 비드부 보강재를 원통형의 롤에 감고 비드코아 및 비드필러 등의 비드부재를 위치시키고 카카스를 턴업시켜 그린 타이어를 성형하게 되는 바, 스틸 보강재와 나일론 보강재가 방향성 재질임에 의해 상호 자신의 방향성에 대해 움직이므로 상대적으로코드 방향에 대해 강성이 큰 스틸 보강재는 폭방향의 줄어듦이 적은데 반해 상대적으로 폭방향의 강성이 적은 나이론 보강재는 그 폭방향의 축소량이 크게 되어 성형 중 또는 성형완료시 나이론 보강재의 끝단부에서 심한 변형이 발생하고 이로 인해 주위의 부재에 영향을 주어 근처의 부재와 함께 뭉치는 형상이 발생하고, 이것이 원인이되어 완성타이어의 비드부 부재에 후크플로우(Hook Flow)가 발생하는 문제점이 있었다.In the small diameter molding, the existing bead part nylon reinforcement is attached to the carcass and other bead part reinforcement in a cylindrical roll to place bead members such as bead cores and bead fillers, and turn the carcass to form green tires. Since steel reinforcement and nylon reinforcement move toward each other's own direction because they are directional materials, steel reinforcement that is relatively rigid in cord direction has less shrinkage in width direction, whereas nylon reinforcement that is relatively in width direction is less. The amount of shrinkage in the width direction becomes large so that severe deformation occurs at the end of the nylon reinforcement during molding or upon completion of molding, which affects the surrounding members, causing the shape to stick together with nearby members, which causes There was a problem in that a hook flow occurred in the bead member of the finished tire.

이러한 문제점을 해결하고자 신축율이 동일한 나일론 보강재를 2매설치시키는 방법이 시도 되었으나 이는 카카스 턴업 동작시 겹쳐지게 설치된 2매의 나이론 보강재의 사이에서 움직임이 심하게 발생되어 비드부가 변형되고 고무흐름이 불량해지는 문제점이 있었다.In order to solve this problem, a method of installing two pieces of nylon reinforcement having the same elasticity ratio has been attempted. However, when the carcass turn-up operation, two pieces of nylon reinforcement are overlapped and the beads are deformed and the rubber flow is bad. There was a problem with getting lost.

본 발명은 상기와 같은 종래의 문제점을 해결하기 위한 것으로서 본 발명은 비드부에 신축율이 동일한 2매의 나이론 보강재를 사용하여 비드부의 내구성을 증대시키면서도, 2매의 나이론 보강재 설치로 인한 비드부의 변형을 억제시킬 수 있게 하므로서 비드 내구성을 향상시킬 수 있게 한 중하중용 공기입 타이어를 제공함에 그 목적이 있다.The present invention is to solve the above-mentioned problems, the present invention is to increase the durability of the bead portion by using two nylon reinforcement having the same elasticity in the bead portion, while the deformation of the bead portion due to the installation of two nylon reinforcement It is an object of the present invention to provide a heavy-load pneumatic tire that can improve the bead durability while being able to suppress the.

본 발명은 상기와 같은 목적을 달성하기 위하여 다음과 같이 구성된다. 즉, 본 발명은 트래드와 사이드월 및 비드부로 구성되고, 상기 비드부의 비드코아에 카카스의 단부가 턴업설치되며, 턴업 설치된 카카스의 외측에 보강재가 설치되는 것에 있어서, 상기 보강재를 2매의 나일론 보강재로 형성시키되, 카카스와 직접 접촉하는 제 1 보강재의 일단은 비드코아를 감싸는 위치에 설치시키고, 제 1보강재의 외측에 설치되는 제 2 보강재의 일단은 비드코아의 하부로부터 벗어난 위치에 설치시켜 구성되는 것에 특징을 둔 것이다.The present invention is configured as follows to achieve the above object. That is, this invention consists of a tread, a sidewall, and a bead part, The edge part of a carcass is turned up in the bead core of the said bead part, The reinforcement material is provided in the outer side of the turn-up installed carcass, and the said reinforcement material is two pieces. It is formed of a nylon reinforcing material, one end of the first reinforcing material in direct contact with the carcass is installed in a position surrounding the bead core, and one end of the second reinforcing material installed outside the first reinforcement is installed in a position away from the bottom of the bead core It is characterized by what is constructed.

도 1 은 일반적인 중하중용 공기입 타이어를 발췌 도시한 단면도1 is a cross-sectional view showing a typical heavy-load pneumatic tire

도 2 는 본 발명에 따른 비드부의 제조과정을 도시한 단면도Figure 2 is a cross-sectional view showing the manufacturing process of the bead portion according to the present invention

도 3 은 본 발명의 비드부가 성형 완료된 상태를 발췌 도시한 단면도Figure 3 is a cross-sectional view showing a state in which the bead portion of the present invention is molded

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

1. 트래드 2. 사이드월1. Tread 2. Sidewall

3. 비드부 4. 보강재3. Bead part 4. Stiffener

10. 카카스 30. 비드코아10. Carcass 30.Bidcoa

이하에서는 첨부된 도면을 참조하여 본 발명의 바람직한 실시 예를 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention;

첨부된 도면 도 1 은 일반적인 중하중용 공기입 타이어를 발췌 도시한 단면도이고, 도 2 는 본 발명에 따른 비드부의 제조과정을 도시한 단면도이며, 도 3 은 본 발명의 비드부가 성형 완료된 상태를 발췌 도시한 단면도이다.1 is a cross-sectional view showing a typical heavy-load pneumatic tire, Figure 2 is a cross-sectional view showing the manufacturing process of the bead portion according to the present invention, Figure 3 is a view showing a state in which the bead portion of the present invention is molded One cross section.

도 1 내지 도 3 에 도시되는 바와 같이, 본 발명은 트래드(1)와 사이드월(2) 및 비드부(3)로 구성되고, 상기 비드부(3)의 비드코아(30)에 카카스(10)의 단부가 턴업설치되며, 턴업 설치된 카카스의 외측에 보강재(4)가 설치되는 것에 있어서, 상기 보강재를 2매의 나일론 보강재(41)(42)로 형성시키되, 카카스(10)와 직접 접촉하는 제 1 보강재(41)의 일단은 비드코아(30)를 감싸는 위치에 설치시키고, 제 1보강재(41)의 외측에 설치되는 제 2 보강재(42)의 일단은 비드코아(30)의 하부로부터 벗어난 위치에 설치시켜 구성되는 것으로서, 상기 제 2 보강재(42)의 일단은 비드코아(30)의 선단 모서리(31)로부터 10∼30㎜의 범위내에 위치되도록 설치시켜 구성한다.As shown in Figs. 1 to 3, the present invention is composed of a tread 1, a sidewall 2 and a bead part 3, and a carcass (3) on the bead core 30 of the bead part 3; 10, the end of the turn-up is installed, the reinforcement 4 is provided on the outer side of the turn-up carcass, the reinforcement is formed of two nylon reinforcement (41, 42), the carcass 10 and One end of the first reinforcing material 41 in direct contact is installed at a position surrounding the bead core 30, and one end of the second reinforcing material 42 provided outside the first reinforcing material 41 of the bead core 30 It is comprised so that it may be provided in the position which deviated from the lower part, One end of the said 2nd reinforcing material 42 is comprised so that it may be located in the range of 10-30 mm from the front edge 31 of the bead core 30.

또한 제 1 보강재(41)의 또 다른 일단과 제 2 보강재(42)의 또 다른 일단은 서로 이격시켜 설치시키되, 이격되는 간격은 20㎜이상이 되도록 설치시키는 것이 바람직하다.In addition, the other end of the first reinforcing material 41 and the other end of the second reinforcing material 42 is spaced apart from each other, it is preferable to be installed so that the spaced interval is 20mm or more.

본 발명은 전술한 실시 예에 한정되지 않고 본 발명의 기술사상이 허용하는 범위 내에서 다양하게 변형하여 실시할 수가 있다.The present invention is not limited to the above embodiments, and various modifications can be made within the scope allowed by the technical idea of the present invention.

이상에서와 같이 본 발명에 따르면 비드부에 신축율이 동일한 2매의 나이론 보강재를 사용하여 비드부의 내구성을 증대시키면서도, 2매의 나이론 보강재 설치로 인한 비드부의 변형을 억제시킬 수 있게 하므로서 비드 내구성을 향상시킬 수 있는 효과가 있다.As described above, according to the present invention, by using two nylon reinforcing materials having the same elasticity in the bead part, while increasing the durability of the bead part, it is possible to suppress the bead part deformation due to the installation of two nylon reinforcing materials, thereby improving bead durability. There is an effect that can be improved.

Claims (3)

트래드(1)와 사이드월(2) 및 비드부(3)로 구성되고, 상기 비드부(3)의 비드코아(30)에 카카스(10)의 단부가 턴업설치되며, 턴업 설치된 카카스의 외측에 보강재(4)가 설치되는 것에 있어서, 상기 보강재를 2매의 나일론 보강재(41)(42)로 형성시키되, 카카스(10)와 직접 접촉하는 제 1 보강재(41)의 일단은 비드코아(30)를 감싸는 위치에 설치시키고, 제 1보강재(41)의 외측에 설치되는 제 2 보강재(42)의 일단은 비드코아(30)의 하부로부터 벗어난 위치에 설치시켜 구성되는 것을 특징으로 하는 비드내구성을 향상시킨 중하중용 공기입 타이어.Comprising a tread (1), a sidewall (2) and a bead portion (3), the end of the carcass 10 is turned up in the bead core 30 of the bead portion (3), the turn-up of the carcass In the case where the reinforcing material 4 is provided on the outside, the reinforcing material is formed of two nylon reinforcing materials 41 and 42, and one end of the first reinforcing material 41 in direct contact with the carcass 10 is bead core. The end of the second reinforcing material (42), which is installed at the position surrounding the 30 and is installed outside the first reinforcing material (41), is characterized in that the bead is installed in a position away from the lower portion of the bead core (30) Heavy-duty pneumatic tires for improved durability. 제 1 항에 있어서, 상기 제 2 보강재(42)의 일단이 비드코아(30)의 선단 모서리(31)로부터 10∼30㎜의 범위내에 위치됨을 특징으로 하는 비드내구성을 향상시킨 중하중용 공기입 타이어.2. The heavy-duty pneumatic tire according to claim 1, wherein one end of the second reinforcing material (42) is located within a range of 10 to 30 mm from the leading edge (31) of the bead core (30). . 제 1 항 또는 제 2 항에 있어서, 제 1 보강재(41)의 또 다른 일단과 제 2 보강재(42)의 또 다른 일단이 20㎜이상의 간격으로 이격 설치되는 것을 특징으로 하는 비드내구성을 향상시킨 중하중용 공기입 타이어.The heavy load according to claim 1 or 2, wherein another end of the first reinforcing material 41 and the other end of the second reinforcing material 42 are spaced apart at intervals of 20 mm or more. Medium pneumatic tires.
KR1020020059914A 2002-10-01 2002-10-01 Pneumatic tire having improved bead durability KR20040029607A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060003583A (en) * 2004-07-07 2006-01-11 금호타이어 주식회사 Pneumatic tire for medium heavy weight
KR102088907B1 (en) 2018-11-21 2020-03-13 금호타이어 주식회사 Heavy duty pneumatic tire
KR20200059915A (en) 2018-11-22 2020-05-29 금호타이어 주식회사 Heavy duty pneumatic tire

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060003583A (en) * 2004-07-07 2006-01-11 금호타이어 주식회사 Pneumatic tire for medium heavy weight
KR102088907B1 (en) 2018-11-21 2020-03-13 금호타이어 주식회사 Heavy duty pneumatic tire
KR20200059915A (en) 2018-11-22 2020-05-29 금호타이어 주식회사 Heavy duty pneumatic tire

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