JPH06327844A - Tire for toy vehicle and manufacture thereof - Google Patents
Tire for toy vehicle and manufacture thereofInfo
- Publication number
- JPH06327844A JPH06327844A JP5139272A JP13927293A JPH06327844A JP H06327844 A JPH06327844 A JP H06327844A JP 5139272 A JP5139272 A JP 5139272A JP 13927293 A JP13927293 A JP 13927293A JP H06327844 A JPH06327844 A JP H06327844A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- outer skin
- sponge body
- sponge
- skin
- 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.)
- Pending
Links
Landscapes
- Toys (AREA)
- Tires In General (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ラジオコントロール等
の玩具車のタイヤとその製造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire for a toy car such as a radio control and a method for manufacturing the tire.
【0002】[0002]
【従来の技術】ラジオコントロール等の玩具車は車体重
量1.0〜2.0kg、最高時速50kmで走行するものがあ
り、しかも、アスファルト路、コンクリート路、砂地と
いった各種路面での直線曲線走行が要求される。従っ
て、タイヤ性能もハイレベルなものとなっている。2. Description of the Related Art Some toy cars such as radio control cars have a body weight of 1.0 to 2.0 kg and can run at a maximum speed of 50 km / h, and moreover, they are capable of running straight curved lines on various road surfaces such as asphalt roads, concrete roads and sands. Required. Therefore, the tire performance is also high level.
【0003】タイヤに必要な基本要件は、路面に対する
グリップ力と、車体重量を支え且つ路面からの振動を吸
収する剛性との二要件である。前者のグリップ力は、ゴ
ムを軟質なものにすればする程高くなり、後者の剛性は
ゴムを硬質なものにすればする程高くなる。即ち、グリ
ップ力を高めようとして柔いゴムを使うと、車体重量を
支えるに充分な剛性を得ることができず、逆に又、必要
な剛性を維持させると、グリップ力が弱く、タイヤスリ
ップが生じ易い。云い換えれば、タイヤは、グリップ力
と剛性という相反する性質をバランスさせ、ハイレベル
な性能を引出している。Two basic requirements for tires are gripping the road surface and rigidity for supporting the weight of the vehicle body and absorbing vibrations from the road surface. The grip force of the former becomes higher as the rubber is made softer, and the rigidity of the latter becomes higher as the rubber is made harder. That is, if a soft rubber is used to increase the grip force, it is not possible to obtain sufficient rigidity to support the weight of the vehicle body. Conversely, if the necessary rigidity is maintained, the grip force will be weak and tire slip will not occur. It is easy to occur. In other words, tires balance the contradictory properties of grip and rigidity to bring out a high level of performance.
【0004】従来の玩具車用タイヤの代表例は、前述し
た相反する性質のバランスを考慮した中空ゴムタイヤ
と、中実スポンジタイヤが主流となっている。中空ゴム
タイヤは、タイヤ自身を柔軟にすることによってグリッ
プ力は高められるが、剛性を確保するために柔軟にする
のには限度があり、結果的に実用化されている中実スポ
ンジタイヤよりグリップ力が低いのが現実である。中実
スポンジタイヤは、スポンジ表面の気泡の目が路面の細
かな凹凸にひっかかってグリップ力を確保する。このた
め凹凸のない路面(ビニタイル等)や路面の細かな凹凸
がスポンジの目の大きさに合わない場合はグリップ力が
低下する。これとは別に、ラジオコントロールファンの
間では、中実スポンジタイヤの表面にゴム管を嵌め、路
面条件に応じてゴム管の材質を変え、前述したタイヤの
基本的要件の充足を図っている。As typical examples of conventional toy car tires, hollow rubber tires and solid sponge tires in consideration of the balance of the above-mentioned contradictory properties are mainly used. Hollow rubber tires have increased gripping power by making them softer, but there is a limit to their flexibility in order to ensure rigidity, and as a result, gripping force is better than that of solid sponge tires that have been put to practical use. The reality is that is low. With solid sponge tires, the eyes of the bubbles on the sponge surface catch on the fine irregularities on the road surface to ensure grip. For this reason, the gripping force is reduced when the road surface has no unevenness (such as vinyl tiles) or the fine unevenness of the road surface does not match the size of the eyes of the sponge. Separately from this, between the radio control fans, a rubber tube is fitted on the surface of the solid sponge tire, and the material of the rubber tube is changed according to the road surface condition to satisfy the basic requirements of the tire described above.
【0005】[0005]
【本発明が解決しようとする課題】前述した中実スポン
ジタイヤにゴム管を嵌め込んだキャップドタイヤは、ス
ポンジ材とゴム材の特色を引出しそれを応用しようとす
る点に注目される。しかし、このキャップドタイヤは、
市販の中実スポンジタイヤの外周面に軟質のゴム管を輪
切りにしたものを嵌め込むが、中実スポンジタイヤの外
径よりゴム管の内径を小さくし、ゴムの弾力を利用して
中実スポンジタイヤにぴったりと嵌めるのが一般的であ
る。しかし、この場合、ゴム管は伸び、本来の軟らかさ
が失われ、グリップ力が低下する傾向にある。また、ゴ
ム管の伸びによるグリップ力の低下を防ぐには、中実ス
ポンジタイヤの外径に対し、ゴム管の内径をわずかに小
さくするか、ほぼ同一とすればよいが、この場合は、加
速や減速、カーブを曲がる時などにかかる力により、ゴ
ム管がスポンジタイヤから外れやすい。これを防ぐため
にスポンジタイヤとゴム管を接着するが、接着剤を均一
に塗付することが難しく、塗付された接着剤の厚みの違
いがゴム管の表面に表れ、タイヤ外周面が均一にならず
細かな凹凸が生じることになって、グリップ力を低下さ
せる原因となる。この接着剤の厚みの違いによるタイヤ
の外周面の仕上がりへの影響は柔らかい材質のゴム管ほ
ど大きなものとなり、結果としてグリップ力を高めるた
めにゴム管の材質を柔らかくするには限度が生じる。
又、スポンジタイヤの側面でゴム管の両端が浮き上がり
気味になり、外観上、見苦しいものになると共に、高速
で回転するタイヤであることを考えるとバランス不良に
よる振動の原因ともなる。It is noted that the above-mentioned capped tire in which a rubber tube is fitted into the solid sponge tire draws out the special features of the sponge material and the rubber material and applies it. However, this capped tire
A commercially available solid sponge tire is fitted with a rounded soft rubber tube, but the inner diameter of the rubber tube is made smaller than the outer diameter of the solid sponge tire, and the elasticity of rubber is used to create a solid sponge. It is generally fitted snugly on the tire. However, in this case, the rubber tube tends to be stretched, the original softness is lost, and the grip force tends to be reduced. To prevent the decrease in grip force due to the elongation of the rubber tube, the inner diameter of the rubber tube may be made slightly smaller than or substantially the same as the outer diameter of the solid sponge tire. The rubber tube is easily disengaged from the sponge tire due to the force applied when decelerating or turning a curve. To prevent this, the sponge tire and the rubber tube are bonded, but it is difficult to apply the adhesive evenly, and the difference in the thickness of the applied adhesive appears on the surface of the rubber tube, and the tire outer peripheral surface is even. However, fine irregularities are generated, which causes a decrease in grip strength. The influence of the difference in the thickness of the adhesive on the finish of the outer peripheral surface of the tire becomes greater as the rubber tube made of a softer material becomes larger, and as a result, there is a limit to softening the material of the rubber tube in order to increase the grip.
Further, both ends of the rubber tube are likely to be lifted up on the side surface of the sponge tire, which makes the appearance unsightly and also causes vibration due to imbalance when considering that the tire rotates at high speed.
【0006】それ故に、本発明は、前述した従来の玩具
車用タイヤの欠点を解消させることを解決すべき課題と
する。Therefore, it is an object of the present invention to solve the above-mentioned drawbacks of the conventional tire for a toy car.
【0007】[0007]
【課題を解決するための手段】本発明は、前述した課題
を解決するために、軟質のゴム材を使うことでグリップ
力を追求し、硬質のスポンジ体を使うことで剛性を追求
するという新しい技術的概念を導入する。In order to solve the above-mentioned problems, the present invention seeks a grip force by using a soft rubber material and a rigidity by using a hard sponge body. Introduce a technical concept.
【0008】本発明は、具体的には、軟質ゴムからなる
表皮と、該表皮の内側に該表皮と一体となるよう発泡さ
れたスポンジ体とを有し、該表皮が路面に対するグリッ
プ力を確保し、スポンジ体がタイヤに必要な剛性を確保
する玩具車用タイヤを提供する。Specifically, the present invention has an outer skin made of soft rubber and a sponge body which is foamed so as to be integrated with the outer skin on the inside of the outer skin, and the outer skin secures a grip force on a road surface. A toy car tire is provided in which the sponge body ensures the rigidity required for the tire.
【0009】さらに、本発明は、ゴム材からなる表皮を
型成形すること、中子付き型内に表皮を配すること、表
皮内側と中子との間でスポンジ体を発泡成形することよ
りなる玩具車用タイヤの製造法を提供する。Further, the present invention comprises molding a skin made of a rubber material, placing the skin in a mold with a core, and foam molding a sponge body between the inside of the skin and the core. A method of manufacturing a tire for a toy car is provided.
【0010】[0010]
【作用】本発明では、金型内において柔軟なゴムでタイ
ヤ外形を形成し、その後スポンジ体をタイヤ内に充填、
発泡させるために、表皮となるゴムに引っ張りの力がか
かることが少なく、本来持っている柔軟性を損なわれる
ことが少なく、高いグリップ力を得やすい。また表皮と
なるゴムと内部のスポンジは成形時に一体に融合するこ
とから、接着剤を使わなくてもよく、タイヤ外周面の仕
上がりを均一にできる。更に金型内で成形するため、本
物の自動車に使われているタイヤのように外周面にトレ
ッドパターンを入れたり、側面に文字等を入れることで
本物らしさを高めることを可能とする。さらに、軟質ゴ
ム材からなる表皮は、各種路面に対して充分なグリップ
力を示し、又、スポンジ体がタイヤに必要な剛性を示す
ので、表皮は剛性を全く考慮せず、グリップ力のみを、
且つスポンジ体はグリップ力を全く考慮せず剛性のみに
着目して材質選択を可能にする。In the present invention, the outer shape of the tire is formed of a soft rubber in the mold, and then the sponge body is filled in the tire,
Due to the foaming, the rubber that serves as the outer skin is less subject to a pulling force, the original flexibility is not impaired, and high gripping power is easily obtained. Further, since the rubber to be the skin and the sponge inside are fused together at the time of molding, it is not necessary to use an adhesive and the finish of the tire outer peripheral surface can be made uniform. Further, since the molding is performed in the mold, it is possible to enhance the authenticity by putting a tread pattern on the outer peripheral surface or putting characters on the side surface like a tire used in a real automobile. Furthermore, the skin made of a soft rubber material shows a sufficient grip force on various road surfaces, and the sponge body shows the rigidity required for the tire, so the skin does not consider the rigidity at all, and only the grip force is
In addition, the sponge body allows material selection without paying attention to gripping force, focusing only on rigidity.
【0011】[0011]
【実施例】玩具車用タイヤ1は、軟質ゴム材の表皮2
と、該表皮の内側にあって該表皮と一体のスポンジ体3
とよりなり、スポンジ体3がホイール4に支持される。
表皮2は、1.5mm以下の厚みで、天然ゴム、スチレンブ
タジエンゴム、ブチルゴム、ブタジエンゴム、ウレタン
ゴム、ポリノルボーネンゴム等の材料が使用可能で、路
面とのグリップ力を高めるに必要な軟らかさにする。即
ち、タイヤに要求される剛性を無視して、グリップ力の
みを考慮した材料選択とする。表皮2はJIS−A型硬
度計で40°以下の硬度でよい。好ましくは、同硬度計
で15〜25°の範囲とする。スポンジ体3は、発泡体
状に成型でき、軽量にして、振動を吸収し且つ車体重量
を支えるに充分な剛性を有する材料が好ましい。たとえ
ば、ウレタン樹脂、塩化ビニル樹脂、ポリスチレン樹脂
等の樹脂系材料を使用できる。ASKER−C型硬度計
で30°以下のスポンジ体でよい。好ましくは、同硬度
計で15〜25°の範囲とする。[Example] A tire 1 for a toy car has a skin 2 made of a soft rubber material.
And a sponge body 3 which is inside the epidermis and is integral with the epidermis
And the sponge body 3 is supported by the wheel 4.
The skin 2 has a thickness of 1.5 mm or less and can be made of a material such as natural rubber, styrene-butadiene rubber, butyl rubber, butadiene rubber, urethane rubber, or polynorbornene rubber, and is soft enough to enhance grip with the road surface. Say it. That is, the rigidity required for the tire is ignored, and the material is selected in consideration of only the grip force. The skin 2 may have a hardness of 40 ° or less according to the JIS-A type hardness meter. Preferably, the hardness meter has a range of 15 to 25 °. The sponge body 3 is preferably a material that can be molded into a foam, is lightweight, has sufficient rigidity to absorb vibrations and support the weight of the vehicle body. For example, a resin material such as urethane resin, vinyl chloride resin, polystyrene resin can be used. A sponge body with an ASKER-C hardness meter of 30 ° or less may be used. Preferably, the hardness meter has a range of 15 to 25 °.
【0012】次に、玩具車用タイヤ1の成型例を示す。
1mm厚みのタイヤ外周面とその縁を作る金型にて、天然
ゴムを160℃、10分間加流させ表皮2を作製した。
この表皮2を図に示す金型5内に配し、その内周面に、
ビニルトリメトキシシラン(信越化学、KBU−100
3)2重量%希釈品を塗付する。中子の周囲から、金型
5内にエーテル系ウレタン樹脂(日本ポリウレタン工
業、CFA−001とNFA−001との混合品)を流
し込み、5倍に発泡させながら室温で30分硬化させ、
表皮2とスポンジ体3とを一体化したタイヤ1を作製し
た。Next, a molding example of the toy car tire 1 will be shown.
A natural rubber was applied at 160 ° C. for 10 minutes with a mold for forming the outer peripheral surface of the tire having a thickness of 1 mm and its edge, and the skin 2 was produced.
This skin 2 is placed in the mold 5 shown in the figure, and on its inner peripheral surface,
Vinyltrimethoxysilane (Shin-Etsu Chemical, KBU-100
3) Apply 2% by weight diluted product. From the periphery of the core, an ether type urethane resin (Nippon Polyurethane Industry, a mixture of CFA-001 and NFA-001) is poured into the mold 5 and allowed to cure for 30 minutes at room temperature while foaming 5 times.
A tire 1 in which the skin 2 and the sponge body 3 were integrated was produced.
【0013】このようにして形成したスポンジコアラバ
ータイヤの走行試結果を示す。 タイヤ特性 形状:前輪 φ55mm 後輪 φ58mm 素材:ラバー表皮2 天然ゴム 硬度20°(JIS-A 型硬度計) インナースポンジ3 ウレタン樹脂 硬度20°(ASKER-C 型硬度計) 一体成型品 硬度30°(ASKER-C 型硬度計) ラバー表皮厚さ: 1mm 重量:前輪 12.5g 後輪 15.2g 結果 軟質なグリップ感があり、車体を中心に軽い四輪操舵の
ようなニュートラルステアで曲がり、この時の舵角はわ
ずかであり、前輪をこじることによる失速がなく、ラッ
プタイム短縮に大きく貢献するハイスピードで高効率な
コーナリングを示した。尚、比較のため同寸法の従来の
中空ゴムタイヤ、中実スポンジタイヤ及びキャップドタ
イヤを同一車体に配して、同一条件で走行させたが、ラ
ップタイムはスポンジコアラバータイヤに及ばなかっ
た。The running test results of the sponge core rubber tire thus formed are shown below. Tire characteristics Shape: Front wheel φ55mm Rear wheel φ58mm Material: Rubber skin 2 Natural rubber Hardness 20 ° (JIS-A type hardness tester) Inner sponge 3 Urethane resin hardness 20 ° (ASKER-C type hardness tester) Integrated product hardness 30 ° ( ASKER-C type hardness tester) Rubber skin thickness: 1mm Weight: Front wheel 12.5g Rear wheel 15.2g Result A soft grip feel and bend with neutral steering like light four-wheel steering around the body, at this time The steering angle of the car was small and there was no stall due to twisting the front wheels, and it showed high speed and high efficiency cornering that greatly contributes to shortening the lap time. For comparison, a conventional hollow rubber tire, a solid sponge tire, and a capped tire of the same size were placed in the same vehicle body and run under the same conditions, but the lap time was shorter than that of the sponge core rubber tire.
【0014】[0014]
【効果】本発明による玩具車用タイヤは、スポンジ体の
材質と発泡倍率の選択により、中実スポンジタイヤ並み
の軽さに仕上げることができる。さらに、表皮の縁をス
ポンジ体と一体にし、実物タイヤと同形状のものとさ
せ、スケール感を出すことができる。The tire for a toy car according to the present invention can be finished as light as a solid sponge tire by selecting the material of the sponge body and the expansion ratio. Further, the edge of the skin can be made integral with the sponge body so that it has the same shape as the actual tire, giving a sense of scale.
【図1】本発明のタイヤの一例の断面図である。FIG. 1 is a cross-sectional view of an example of a tire of the present invention.
【図2】タイヤ成形例を示す断面図である。FIG. 2 is a cross-sectional view showing a tire molding example.
1 タイヤ 2 表皮 3 スポンジ体 4 ホイール 1 Tire 2 Skin 3 Sponge 4 Wheel
Claims (3)
に該表皮と一体となるよう発泡されたスポンジ体とを有
し、該表皮が路面に対するグリップ力を確保し、スポン
ジ体がタイヤに必要な剛性を確保する玩具車用タイヤ。1. An outer skin made of soft rubber and a sponge body which is foamed so as to be integrated with the outer skin on the inner side of the outer skin. The outer skin secures a grip force on a road surface, and the sponge body is used for a tire. Toy car tires that ensure the required rigidity.
材よりなる請求項1記載の玩具車用タイヤ。2. The toy vehicle tire according to claim 1, wherein the outer skin is made of natural rubber and the sponge body is made of a synthetic resin material.
中子付き型内に表皮を配すること、表皮内側と中子との
間で樹脂材を発泡させスポンジ体を成形することよりな
る玩具車用タイヤの製造法。3. Molding a skin made of a rubber material,
A method for manufacturing a tire for a toy car, comprising placing a skin in a mold with a core, and foaming a resin material between the inside of the skin and the core to form a sponge body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5139272A JPH06327844A (en) | 1993-05-19 | 1993-05-19 | Tire for toy vehicle and manufacture thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5139272A JPH06327844A (en) | 1993-05-19 | 1993-05-19 | Tire for toy vehicle and manufacture thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06327844A true JPH06327844A (en) | 1994-11-29 |
Family
ID=15241426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5139272A Pending JPH06327844A (en) | 1993-05-19 | 1993-05-19 | Tire for toy vehicle and manufacture thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06327844A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011137785A (en) * | 2010-01-04 | 2011-07-14 | Beckman Coulter Inc | Analyzer |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4916536A (en) * | 1972-06-09 | 1974-02-14 | ||
JPS5252202A (en) * | 1975-10-23 | 1977-04-26 | Hoechst Ag | Packings for packing box of piston pumps having metallic piston |
JPS5328353A (en) * | 1976-07-26 | 1978-03-16 | Hitachi Ltd | Medical data processing sys tem |
-
1993
- 1993-05-19 JP JP5139272A patent/JPH06327844A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4916536A (en) * | 1972-06-09 | 1974-02-14 | ||
JPS5252202A (en) * | 1975-10-23 | 1977-04-26 | Hoechst Ag | Packings for packing box of piston pumps having metallic piston |
JPS5328353A (en) * | 1976-07-26 | 1978-03-16 | Hitachi Ltd | Medical data processing sys tem |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011137785A (en) * | 2010-01-04 | 2011-07-14 | Beckman Coulter Inc | Analyzer |
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