JP4124534B2 - Spike pin for spike tire - Google Patents
Spike pin for spike tire Download PDFInfo
- Publication number
- JP4124534B2 JP4124534B2 JP07008499A JP7008499A JP4124534B2 JP 4124534 B2 JP4124534 B2 JP 4124534B2 JP 07008499 A JP07008499 A JP 07008499A JP 7008499 A JP7008499 A JP 7008499A JP 4124534 B2 JP4124534 B2 JP 4124534B2
- Authority
- JP
- Japan
- Prior art keywords
- spike
- pin
- tire
- present
- vickers hardness
- 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 - Fee Related
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Description
【０００１】
【発明の属する技術分野】
本発明はスパイクタイヤ用スパイクピンに関し、更に詳しくは氷路面上でのタイヤ性能が良好で走行時の粉塵発生を抑制し、そして耐摩耗性及び耐久性に優れたスパイクタイヤ用スパイクピンに関する。
【０００２】
【従来の技術】
従来スパイクタイヤ用スパイクピンとしては、金属、超硬合金、粉塵、硬質プラスチックなどが使用されているが、金属を使用した場合には走行時に路面が削られて粉塵を発生させるという問題があり、またプラスチックの場合には耐久性に難点があるという問題があった。
【０００３】
【発明が解決しようとする課題】
従って、本発明の目的は、前記した従来技術の問題点を克服し、氷上でのタイヤ性能が良好で、走行時の粉塵発生を抑制し、そして耐摩耗性及び耐久性に優れたスパイクタイヤ用スパイクピンを提供することにある。
【０００４】
【課題を解決するための手段】
本発明に従えば、細分した植物系原料に熱硬化性樹脂を含浸し、高温で熱処理をして炭素化させて得られるビッカース硬度が３０〜１５００の硬質多孔性炭素材料を成型して成るスパイクタイヤ用スパイクピンが提供される。
【０００５】
【発明の実施の形態】
本発明者らは、細分した植物系原料、たとえば米ぬかや細分した木質材料などに熱硬化性樹脂を含浸し、高温で熱処理して炭素化させた硬質多孔性炭素材料を成型したスパイクピンは、熱硬化性樹脂の配合量及び処理温度によりピンの硬さを広範囲に亘って調整することができることを見い出した。更に、本発明で用いる植物系原料は、細分した状態、例えば、粉状、細片状で用いるため、スパイクピンの成型に際し、金型に入れて成型したり、押出し、切削、研磨などの加工による製造が極めて容易に行えるため、様々な形状のスパイクピンを容易に製造することができる。
【０００６】
本発明に従った植物系原料によるスパイクピンはビッカース硬度１０００〜１５００のアスファルト路面よりも硬度が低く、ビッカース硬度が３０以下の氷よりは硬度が高いために、タイヤ走行時に粉塵を発生させることなく、氷路面上での制動性能を改善することができる。一方、氷上での制動性能は従来の鋼鉄などの金属製スパイクピンと同等であるが、耐久性は植物系原料から得られる硬質多孔性炭素材料の優れた耐摩耗性により金属製スパイクピンと同等以上である。
【０００７】
本発明によれば、使用する熱硬化性樹脂の配合量と熱処理温度（焼成温度）を調整することでビッカース硬度を、アスファルト路面より柔らかく、氷路面より硬い硬度である、３０〜１５００の広い範囲、好ましくは２００〜１０００で調整することができる。しかも本発明に従ってスパイクピン用の材料は７５重量％程度は天然素材であるため、人体などの環境への影響が従来の金属やプラスチック性スパイクピンより少ないエコマテリアルであるという特長も有する。
【０００８】
本発明に係るスパイクピンの成型に使用される特定のビッカース硬度を有する硬質多孔性炭素材料は、例えば脱脂した米ぬかや木材粉をフェノール樹脂、ユリア樹脂、メラミン樹脂などの熱硬化性樹脂を含浸させた後、高温で焼成して炭素化させることによって得られるもので、例えばフェノール樹脂を含浸させたものは窒素雰囲気下で７００〜１１００℃で焼成することにより硬質の多孔質炭化粒子を得ることができる。好ましい硬質多孔性炭素材料の代表平均粒径は５０〜５００μｍで、硬度はビッカース硬さで平均３０〜１５００、好ましくは２００〜１０００である。
【０００９】
本発明に従ったスパイクピンは従前のスパイクピンと同様にしてタイヤトレッド部に装着することができ、粉塵の発生を効果的に防止することができると共に耐久性に優れるという効果を得ることができる。
【００１０】
【実施例】
以下、実施例によって本発明を更に説明するが、本発明の範囲をこれらの実施例に限定するものでないことは言うまでもない。
【００１１】
実施例１及び比較例１〜３
表Ｉに示すように、本発明に従ったビッカース硬度の硬質多孔性材料であるＲＢセラミックスを用いたスパイクピン（実施例１）と、従来の超硬質合金を用いたスパイクピン（比較例１）並びに本発明で用いるのと同じ材料であるがビッカース硬度の値が本発明の範囲外の材料を用いたスパイクピン（比較例２及び３）とを常法に従って作製し、タイヤトレッド部に取り付けて、以下の方法で、その路面の摩耗性、氷上制動性能及びピンの寿命について評価した。実施例１および比較例２及び３のスパイクピン材料であるＲＢセラミックスは、米ぬかに熱硬化性樹脂を表Ｉに示す樹脂量にて含浸させ、表Ｉに示す焼成温度にて熱処理し、表Ｉに示すビッカース硬度に調整したものである。結果を表Ｉに示す。
【００１２】
評価方法
１）路面の摩耗…乾燥アスファルト路面上を滑らせ、粉塵発生量が金属スパイクピン程度の場合を×とし、粉塵発生量の減少により順に△、○とした。
２）氷上性能…初速度４０km／hrでロック制動し、制動距離が金属スパイク程度の場合を○、制動距離の増加により順に△、×とした。
３）ピンの寿命…一定距離（２０００km）を走行し、初期のピン長さからの変化の小さいものを○とし、ピンの摩耗の増加に従い順に△、×とした。
【００１３】
【表１】
【発明の効果】
表Ｉに示した結果からも明らかな通り、本発明に従えば、米ぬかや木材粉などの細分した植物系原料に熱硬化性樹脂を含浸し、熱処理した硬質多孔性炭素材料を用いてタイヤ用スパイクピンを構成するので、スパイクピンの硬度を広範囲で制御することができ、スパイクピンの氷上でのタイヤ性能を改善し、粉塵発生を抑制することができ、更に耐久性、寿命を向上させることができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spike pin for a spike tire, and more particularly to a spike pin for a spike tire that has good tire performance on an icy road surface, suppresses generation of dust during traveling, and is excellent in wear resistance and durability.
[0002]
[Prior art]
Conventionally, as spike pins for spike tires, metal, cemented carbide, dust, hard plastic, etc. are used, but when using metal, there is a problem that the road surface is scraped off when traveling and dust is generated, In the case of plastic, there is a problem that there is a difficulty in durability.
[0003]
[Problems to be solved by the invention]
Therefore, the object of the present invention is to overcome the above-mentioned problems of the prior art, have good tire performance on ice, suppress dust generation during running, and have excellent wear resistance and durability. To provide spike pins.
[0004]
[Means for Solving the Problems]
According to the present invention, a spike formed by molding a hard porous carbon material having a Vickers hardness of 30 to 1500 obtained by impregnating a thermosetting resin into a subdivided plant-based raw material and heat-treating it at a high temperature. A tire spike pin is provided.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present inventors have obtained a spike pin obtained by molding a hard porous carbon material obtained by impregnating a thermosetting resin into a subdivided plant raw material, such as rice bran or subdivided wood material, and heat treating at high temperature, It has been found that the hardness of the pin can be adjusted over a wide range by the blending amount of the thermosetting resin and the processing temperature. Furthermore, since the plant-based raw material used in the present invention is used in a subdivided state, for example, in the form of powder or strip, when forming the spike pin, it is put in a mold, processed by extrusion, cutting, polishing, etc. Therefore, spike pins having various shapes can be easily manufactured.
[0006]
The spike pin made of plant material according to the present invention is lower in hardness than an asphalt road surface having a Vickers hardness of 1000 to 1500 and higher in hardness than ice having a Vickers hardness of 30 or less, so that dust is not generated during running of the tire. The braking performance on the icy road surface can be improved. On the other hand, braking performance on ice is equivalent to conventional steel spike pins such as steel, but durability is equal to or better than metal spike pins due to the excellent wear resistance of hard porous carbon materials obtained from plant-based materials. is there.
[0007]
According to the present invention, the Vickers hardness is softer than the asphalt road surface and harder than the ice road surface by adjusting the blending amount of the thermosetting resin to be used and the heat treatment temperature (firing temperature), and a wide range of 30 to 1500. , Preferably, it can adjust by 200-1000. In addition, since the material for spike pins according to the present invention is about 75% by weight of a natural material, it has an advantage that it is an eco-material having less influence on the environment such as the human body than conventional metal or plastic spike pins.
[0008]
The hard porous carbon material having a specific Vickers hardness used for forming the spike pin according to the present invention is made by impregnating a thermosetting resin such as phenol resin, urea resin, melamine resin with degreased rice bran or wood powder, for example. And then carbonized by firing at a high temperature. For example, what is impregnated with a phenol resin can be obtained by firing at 700 to 1100 ° C. in a nitrogen atmosphere to obtain hard porous carbonized particles. it can. The typical average particle diameter of a preferable hard porous carbon material is 50 to 500 μm, and the hardness is Vickers hardness on average 30 to 1500, preferably 200 to 1000.
[0009]
The spike pin according to the present invention can be mounted on the tire tread portion in the same manner as the conventional spike pin, and it is possible to effectively prevent the generation of dust and to obtain the effect of excellent durability.
[0010]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention further, it cannot be overemphasized that the scope of the present invention is not limited to these Examples.
[0011]
Example 1 and Comparative Examples 1-3
As shown in Table I, spike pins (Example 1) using RB ceramics, which is a hard porous material of Vickers hardness according to the present invention, and spike pins using a conventional super hard alloy (Comparative Example 1) In addition, a spike pin (Comparative Examples 2 and 3) using the same material as that used in the present invention but having a Vickers hardness value outside the range of the present invention is manufactured according to a conventional method, and attached to the tire tread portion. The road surface wearability, ice braking performance and pin life were evaluated by the following methods. The RB ceramics which are spike pin materials of Example 1 and Comparative Examples 2 and 3 were impregnated with rice bran thermosetting resin in the amount of resin shown in Table I, and heat treated at the firing temperature shown in Table I. Table I Is adjusted to the Vickers hardness shown in FIG. The results are shown in Table I.
[0012]
Evaluation method 1) Abrasion of road surface: When the dry asphalt road surface was slid and the amount of dust generated was about a metal spike pin, x was given, and Δ and ○ were sequentially given as the amount of dust generated decreased.
2) Performance on ice: The lock braking was performed at an initial speed of 40 km / hr, and the case where the braking distance was about a metal spike was indicated as ◯, and the increase in the braking distance was indicated as △ and × in order.
3) Pin life: A certain distance (2000 km) was traveled, and a small change from the initial pin length was marked as ◯, and as the pin wear increased, △ and × were given in order.
[0013]
[Table 1]
【The invention's effect】
As is apparent from the results shown in Table I, according to the present invention, a plant material such as rice bran or wood flour is impregnated with a thermosetting resin and heat-treated hard porous carbon material is used for tires. Since the spike pin is configured, the hardness of the spike pin can be controlled in a wide range, the tire performance of the spike pin on ice can be improved, dust generation can be suppressed, and durability and life can be improved. Can do.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07008499A JP4124534B2 (en) | 1999-03-16 | 1999-03-16 | Spike pin for spike tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07008499A JP4124534B2 (en) | 1999-03-16 | 1999-03-16 | Spike pin for spike tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000264024A JP2000264024A (en) | 2000-09-26 |
| JP4124534B2 true JP4124534B2 (en) | 2008-07-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07008499A Expired - Fee Related JP4124534B2 (en) | 1999-03-16 | 1999-03-16 | Spike pin for spike tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4124534B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6181415B2 (en) * | 2013-04-26 | 2017-08-16 | 旭化成株式会社 | Composition of modified conjugated diene polymer |
-
1999
- 1999-03-16 JP JP07008499A patent/JP4124534B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000264024A (en) | 2000-09-26 |
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