JPH0617699B2 - Brake shoes for synthetic resin wheels for bicycles - Google Patents

Brake shoes for synthetic resin wheels for bicycles

Info

Publication number
JPH0617699B2
JPH0617699B2 JP2118111A JP11811190A JPH0617699B2 JP H0617699 B2 JPH0617699 B2 JP H0617699B2 JP 2118111 A JP2118111 A JP 2118111A JP 11811190 A JP11811190 A JP 11811190A JP H0617699 B2 JPH0617699 B2 JP H0617699B2
Authority
JP
Japan
Prior art keywords
reinforcing material
rubber
wheel
brake shoe
synthetic resin
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
JP2118111A
Other languages
Japanese (ja)
Other versions
JPH0415330A (en
Inventor
景雨 木村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OOSAKA GURITSUPU KAKO KK
Original Assignee
OOSAKA GURITSUPU KAKO KK
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 OOSAKA GURITSUPU KAKO KK filed Critical OOSAKA GURITSUPU KAKO KK
Priority to JP2118111A priority Critical patent/JPH0617699B2/en
Publication of JPH0415330A publication Critical patent/JPH0415330A/en
Publication of JPH0617699B2 publication Critical patent/JPH0617699B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、自転車用合成樹脂製車輪に対して使用するブ
レーキシューに関する。
TECHNICAL FIELD The present invention relates to a brake shoe used for a synthetic resin wheel for a bicycle.

(従来の技術) 近時、自転車のファッション化に伴ない硬質合成樹脂製
の車輪が使用されるようになった。この車輪は耐衝撃強
度の必要性から、硬質熱可塑性合成樹脂、例えばポリア
ミド系樹脂が使用され、更に強度向上のためガラス繊維
の短繊維等の強化材が配合添加されている。
(Prior Art) Recently, wheels made of hard synthetic resin have come to be used as bicycles have become fashionable. Due to the necessity of impact strength, a hard thermoplastic synthetic resin such as a polyamide resin is used for this wheel, and a reinforcing material such as short glass fiber is added to improve the strength.

ところが、前記車輪に対し、そのリムと摺接して用いら
れるブレーキシューは、一般の鋼製車輪に使用する従来
から市販されているゴム製のものである。このゴム製シ
ューも近時、ゴム組成物の耐摩耗性を向上させるため、
補強効果の高い充填剤、例えばカーボンブラック、シリ
カ等をゴムに配合したり、汎用ゴム中耐摩耗性の優れた
ポリウタジエンゴム等を使用している。
However, the brake shoe used for sliding contact with the rim of the wheel is made of rubber, which is commercially available in the past and is used for general steel wheels. Recently, this rubber shoe also improves the wear resistance of the rubber composition,
A filler having a high reinforcing effect, for example, carbon black, silica or the like is compounded with rubber, or a general-purpose rubber such as polyutadiene rubber having excellent abrasion resistance is used.

一方、ゴム中に短繊維を配合した補強ゴム複合体が特公
昭57−32668号公報で提案されている。
On the other hand, Japanese Patent Publication No. 57-32668 proposes a reinforced rubber composite in which short fibers are mixed in rubber.

(発明が解決しようとする課題) 前記のようにガラス繊維等の強化材が配合添加された合
成樹脂製車輪リムに対し、前記従来の鋼製車輪リムに使
用していたゴム製シューを使用すると、その摩耗が繁し
く、短時日のもとに制動不能となり、非常に危険な状態
になることを知見した。
(Problems to be solved by the invention) As described above, when a rubber shoe used for the conventional steel wheel rim is used for a synthetic resin wheel rim to which a reinforcing material such as glass fiber is added, , It was discovered that the wear was so heavy that braking could not be done in a short time, resulting in a very dangerous condition.

そこで、前記特公昭57−32668号公報に提案されたよう
な補強ゴム複合体を用いることも考えられるが、被制動
体を考慮したものでなく、必ずしも好適な制動効果を発
揮するものでない。
Therefore, it is conceivable to use a reinforced rubber composite as proposed in Japanese Patent Publication No. 57-32668, but it does not take into consideration the braked object and does not necessarily exhibit a suitable braking effect.

本発明は、上記に鑑み自転車用合成樹脂製車輪、特に強
化材の配合された車輪に対し、耐摩耗性能と制動性能の
優れたブレーキシューを提供することを目的とする。
In view of the above, the present invention has an object to provide a brake shoe having excellent wear resistance and braking performance for a bicycle synthetic resin wheel, particularly a wheel in which a reinforcing material is mixed.

(課題を解決するための手段) 本発明は上記の目的を達成するため手段として、硬質熱
可塑性合成樹脂中に、ガラス繊維等の強化材が均一に分
散した繊維強化熱可塑性樹脂により形成された車輪のリ
ムに摺接して使用されるブレーキシューであって、この
ブレーキシューは天然あるいは合成ゴム中に、前記車輪
中に含まれる強化材よりも耐摩耗性の大なる強化材が含
まれたものからなる構成を採用した。
(Means for Solving the Problems) As a means for achieving the above object, the present invention is formed by a fiber-reinforced thermoplastic resin in which a reinforcing material such as glass fiber is uniformly dispersed in a hard thermoplastic synthetic resin. A brake shoe used in sliding contact with the rim of a wheel, wherein the brake shoe contains natural or synthetic rubber containing a reinforcing material having greater wear resistance than the reinforcing material contained in the wheel. The configuration consisting of is adopted.

(作用) 回転する車輪のリムに対しブレーキシューを摺接する
と、両者間に動摩擦力が生ずる。このさい車輪素材中の
強化材よりもブレーキシューのゴム中に含まれる強化材
の方が耐摩耗性が大きいのでシュー表面は比較的摩耗せ
ず、しかもシューのゴムは、車輪側のマトリックス樹脂
と好適に摺接して両者間に大なる摩擦力が生じて制動効
果を発揮する。
(Operation) When the brake shoe slides against the rotating wheel rim, a dynamic friction force is generated between the two. Since the reinforcing material contained in the rubber of the brake shoe has higher wear resistance than the reinforcing material in the wheel material, the shoe surface does not wear relatively easily, and the rubber of the shoe is the same as the matrix resin on the wheel side. The sliding contact is favorably made, and a large frictional force is generated between the two to exert a braking effect.

(実施例) 以下、本発明について詳述する。(Example) Hereinafter, the present invention will be described in detail.

本発明のブレーキシューが使用される自転車の車輪は、
硬質熱可塑性合成樹脂(以下マトリックス樹脂という)
中に、ガラス繊維等の強化材が均一に分散配合された繊
維強化熱可塑性樹脂(以下FRTPという)からなる。
前記マトリックス樹脂としてはポリアミド系(ナイロ
ン),PE,PP,PS,AS,ABS,PPO,PB
T,PEEK等の樹脂を例示できる。
The bicycle wheel in which the brake shoe of the present invention is used is
Hard thermoplastic synthetic resin (hereinafter referred to as matrix resin)
A fiber-reinforced thermoplastic resin (hereinafter referred to as FRTP) in which a reinforcing material such as glass fiber is uniformly dispersed and blended therein.
The matrix resin may be polyamide (nylon), PE, PP, PS, AS, ABS, PPO, PB.
Examples of the resin include T and PEEK.

前記、強化材としては、ガラス繊維,ポリアミド系繊
維,カーボン繊維,ボロン繊維,炭化ケイ素繊維等の無
機、有機系繊維を例示できる。これら強化材は例えばチ
ョップドファイバとして前記マトリックス樹脂に10〜40
%混入してペレット状にし、射出成形等の手段で車輪が
成形される。なお、現在市販されている車輪の殆んど
は、マトリックス樹脂としてポリアミド系樹脂中に強化
材としてガラス繊維をチョップドファイバ形状で混入し
たものが使用されている。
Examples of the reinforcing material include inorganic and organic fibers such as glass fiber, polyamide fiber, carbon fiber, boron fiber and silicon carbide fiber. These reinforcing materials are, for example, 10 to 40 as chopped fibers in the matrix resin.
% Into a pellet, and the wheel is molded by means such as injection molding. It should be noted that most of the wheels currently on the market use a mixture of polyamide resin as a matrix resin and glass fibers as a reinforcing material in the form of chopped fiber.

一方、本発明のブレーキシューに用いられるゴムは、天
然ゴム,合成ポリイソプレンゴム,ポリブタジエンゴ
ム,ウレタンゴム等、及び上記ゴムの2種以上の混合体
も使用できる。更にゴム組成物には通常ゴム配合物に使
用される補強剤、充填剤、軟化剤、粘着付与剤、ゴム加
硫剤、加硫促進剤等が用いられ、通常ゴム硬度は60〜90
度である。
On the other hand, as the rubber used in the brake shoe of the present invention, natural rubber, synthetic polyisoprene rubber, polybutadiene rubber, urethane rubber, etc., and a mixture of two or more of the above rubbers can be used. Further, the rubber composition includes a reinforcing agent, a filler, a softening agent, a tackifier, a rubber vulcanizing agent, a vulcanization accelerator, etc., which are usually used in rubber compounds, and the rubber hardness is usually 60 to 90.
It is degree.

次に本発明のブレーキシューのゴム中に加えられる強化
材としては、ポリアミド系繊維,カーボン繊維,ボロン
繊維,炭化ケイ素繊維等の無機、有機繊維が例示でき
る。しかしながら本発明で使用する前記強化材はFRT
P中の強化材よりも耐摩耗性と強靭性を有することが必
須要件であり、例えばFRTP中の強化材がガラス繊維
の場合には、ゴム中の強化材はポリアミド系繊維の如く
である。
Next, examples of the reinforcing material added to the rubber of the brake shoe of the present invention include inorganic and organic fibers such as polyamide fibers, carbon fibers, boron fibers and silicon carbide fibers. However, the reinforcement used in the present invention is FRT.
It is essential that the reinforcing material in P has wear resistance and toughness. For example, when the reinforcing material in FRTP is glass fiber, the reinforcing material in rubber is like polyamide fiber.

以下に更に本発明の具体的実施例を挙げて説明する。Hereinafter, specific examples of the present invention will be further described.

被制動体の車輪は、マトリックス樹脂にポリアミド樹脂
を使用し、強化材としてガラス繊維のチョップドファイ
バ20%を添加したFRTPで形成されたものである。
The wheel to be braked is formed of FRTP using polyamide resin as a matrix resin and adding 20% of glass fiber chopped fiber as a reinforcing material.

一方、ブレーキシューは、次表の配合組成物からなって
いる。
On the other hand, the brake shoe is made of the composition shown in the following table.

前記の車輪に対し、上記表の配合によるブレーキシュー
の制動距離、摩耗量試験を行なったところ、ブレーキ操
作力20.1Kgf、試験回数10,000回で、制動距離平均324c
m、摩耗量は1gであるのに対し、上記表で強化材を加
えないブレーキシューでは、制動距離平均310cm、摩耗
量は16.8gと、制動距離において両者は殆んど差が認め
られないが、本発明のブレーキシューは、その耐摩耗性
において極めて優れたものであることが判った。
A braking distance of the brake shoe and a wear amount test were conducted on the above wheels according to the composition of the above table, and a braking operation force of 20.1 Kgf and a test count of 10,000 times, an average braking distance of 324 c
While the m and wear amount are 1 g, in the above table, the brake shoe without the reinforcing material has an average braking distance of 310 cm, and the wear amount is 16.8 g. It was found that the brake shoe of the present invention is extremely excellent in abrasion resistance.

なお、上記の試験は一般の自転車用ブレーキの試験方法
により行なったもので、走行速度を20Km/h、荷重90Kg
(フライホィール)、シリンダ径32mmφ=8.038cm2、シ
リンダ圧は制動距離試験では2.5Kgf/cm2、摩耗量試験
では3.0Kgf/cm2の各条件で行なった。
In addition, the above test was carried out by a general bicycle brake test method, running speed 20 Km / h, load 90 Kg.
(Flywheel), a cylinder diameter 32mmφ = 8.038cm 2, 2.5Kgf / cm 2 in the cylinder pressure braking distance tests, the wear amount test was conducted under the conditions of 3.0 kgf / cm 2.

(発明の効果) 本発明は車輪素材であるFRTP中の強化材よりも、ブ
レーキシューのゴム中に含まれる強化材として耐摩耗性
の大なるものを使用したので、車輪側の強化材がシュー
側の強化材を介してゴムに摺接するので、シュー側の強
化材が犠牲となってゴムを摩滅することがなく、一方、
シュー側のゴムを車輪側のマトリックス樹脂とよく摺接
して制動力を発揮することになり、従来のゴム製シュー
に比し格段の耐久性が得られたのである。
(Effects of the Invention) Since the present invention uses a material having greater wear resistance as the reinforcing material contained in the rubber of the brake shoe than the reinforcing material in FRTP, which is the wheel material, the reinforcing material on the wheel side is the shoe. Since it comes into sliding contact with the rubber via the reinforcing material on the side, the reinforcing material on the shoe side does not sacrifice and wear the rubber.
The rubber on the shoe side was in good contact with the matrix resin on the wheel side to exert braking force, and the durability was remarkably higher than that of the conventional rubber shoe.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】硬質熱可塑性合成樹脂中に、ガラス繊維等
の強化材が均一に分散した繊維強化熱可塑性樹脂により
形成された車輪のリムに摺接して使用されるブレーキシ
ューであって、 このブレーキシューは天然あるいは合成ゴム中に、前記
車輪中に含まれる強化材よりも耐摩耗性の大なる強化材
が含まれたものからなる自転車用合成樹脂製車輪のブレ
ーキシュー。
1. A brake shoe which is used by slidingly contacting a wheel rim formed of a fiber reinforced thermoplastic resin in which a reinforcing material such as glass fiber is uniformly dispersed in a hard thermoplastic synthetic resin, The brake shoe is a synthetic resin wheel brake shoe for a bicycle, which is made of natural or synthetic rubber containing a reinforcing material having greater wear resistance than the reinforcing material contained in the wheel.
JP2118111A 1990-05-07 1990-05-07 Brake shoes for synthetic resin wheels for bicycles Expired - Lifetime JPH0617699B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2118111A JPH0617699B2 (en) 1990-05-07 1990-05-07 Brake shoes for synthetic resin wheels for bicycles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2118111A JPH0617699B2 (en) 1990-05-07 1990-05-07 Brake shoes for synthetic resin wheels for bicycles

Publications (2)

Publication Number Publication Date
JPH0415330A JPH0415330A (en) 1992-01-20
JPH0617699B2 true JPH0617699B2 (en) 1994-03-09

Family

ID=14728300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2118111A Expired - Lifetime JPH0617699B2 (en) 1990-05-07 1990-05-07 Brake shoes for synthetic resin wheels for bicycles

Country Status (1)

Country Link
JP (1) JPH0617699B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100451375C (en) * 2003-12-03 2009-01-14 李海 Brake block and its manufacturing method
JP4543865B2 (en) * 2004-10-08 2010-09-15 フジテック株式会社 Rope brake
EP2520478B1 (en) * 2011-05-02 2014-01-22 CAMPAGNOLO S.r.l. Brake pad for a bicycle
CN106220916A (en) * 2016-08-16 2016-12-14 广西南宁胜祺安科技开发有限公司 A kind of preparation method of function admirable modified friction material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5259687A (en) * 1975-11-12 1977-05-17 Yutaka Tanahashi Abrasion resisting moldings strongly bonded carbon fiber and rubber

Also Published As

Publication number Publication date
JPH0415330A (en) 1992-01-20

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