JP2006290301A - Endless structure of rubber crawler - Google Patents

Endless structure of rubber crawler Download PDF

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JP2006290301A
JP2006290301A JP2005117353A JP2005117353A JP2006290301A JP 2006290301 A JP2006290301 A JP 2006290301A JP 2005117353 A JP2005117353 A JP 2005117353A JP 2005117353 A JP2005117353 A JP 2005117353A JP 2006290301 A JP2006290301 A JP 2006290301A
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rubber
steel cord
endless structure
steel
rubber crawler
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JP4782464B2 (en
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Yoshihiko Ono
義彦 小野
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Bridgestone Corp
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Bridgestone Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a phenomenon of eliminating the curve of a steel cord at a butted portion in an endless structure in which the steel cords at both ends of a rubber crawler base body overlap each other and are vulcanized. <P>SOLUTION: In the endless structure, steel cords 2 are longitudinally embedded in a long rubber crawler base body 1 with ends, the steel cords are protruded from both ends of the rubber crawler base body, and the steel cords overlap each other and area vulcanization-adhered, the steel cord on one side corresponding to tips of the overlapped steel cords is waved in the separating direction from the tip of the steel cords, or a separate rubber material is affixed thereto. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明はゴムクロ−ラのエンドレス構造の改良に関するものである。   The present invention relates to an improvement in the endless structure of a rubber track.

ゴムクロ−ラのエンドレス構造としては、一般には長尺で有端のゴムクロ−ラ基体を加硫成形し、この両端を接着してエンドレス構造としている。その際、ゴムクロ−ラ基体中に埋設されているスチ−ルコ−ドをその両端より突出させておき、これを重ね合わせた状態で加硫接着し、エンドレスのゴムクロ−ラとするものである。   As an endless structure of a rubber crawler, generally, a long and end rubber crawler base is vulcanized and bonded at both ends to form an endless structure. At that time, a steel cord embedded in the rubber track substrate is protruded from both ends thereof, and vulcanized and bonded in a state of being overlapped to form an endless rubber track.

図１はその一例を示す図であり、符号１はゴムクロ−ラ基体であり、その長手方向にスチ−ルコ−ド２が埋設されたものである。そして、ゴムクロ−ラ基体１の両端より突出するかかるスチ−ルコ−ド２の両端２ａ、２ｂを重ね合わせて加硫するものである。尚、この際、通常はＡ部のゴムは未加硫或いは半加硫状態としておき、特にゴムクロ−ラ基体１の両端１ａ、１ｂを突き合わせて加硫することとしている。尚、ゴムクロ−ラには外面にラグが形成され、その長手方向に一定ピッチをもって芯金が埋設されているが、ここでは図示しない。   FIG. 1 is a view showing an example thereof. Reference numeral 1 denotes a rubber track substrate, and a steel cord 2 is embedded in the longitudinal direction thereof. Then, both ends 2a and 2b of the steel cord 2 projecting from both ends of the rubber track substrate 1 are overlapped and vulcanized. At this time, the rubber of part A is usually left in an unvulcanized or semi-vulcanized state, and in particular, the both ends 1a and 1b of the rubber-cola base 1 are abutted and vulcanized. Note that a lug is formed on the outer surface of the rubber crawler, and a core metal is embedded at a constant pitch in the longitudinal direction, but it is not shown here.

しかしながら、かかる部位Ａのゴムが加硫される際には当然ゴムの流れが起き、スチ−ルコ−ド２ａ、２ｂはこの流れに伴って引っ張られる傾向にあり、図１の点線にて示すようにスチ−ルコ−ド２ａ側が突き合わせ側に湾曲３した状態でエンドレス構造が完成することとなる。エンドレス部がかかる状態となっているゴムクロ−ラは建設機械や高速キャリア、トラクタ−等の重作業や高速車両ではこの部分の応力歪みが大きく、スチ−ルコ−ド２の切断、ゴムとの接着の剥離、更には、ゴム部４における亀裂等の耐久性に問題があった。   However, when the rubber in the part A is vulcanized, naturally, a rubber flow occurs, and the steel cords 2a and 2b tend to be pulled along with this flow, as shown by the dotted line in FIG. In addition, the endless structure is completed in a state where the steel cord 2a side is curved 3 toward the butting side. The rubber crawler with the endless part applied is heavy in construction machinery, high-speed carriers, tractors, etc., and in high-speed vehicles, the stress strain at this part is large, cutting the steel cord 2 and bonding with rubber Further, there was a problem in the durability such as peeling of the rubber part 4 and cracks in the rubber part 4.

本発明は上記したうに長尺のゴムクロ−ラ基体の両端部のスチ−ルコ−ドを重ね合わせて加硫してなるエンドレス構造において、突き合わせ部におけるスチ−ルコ−ドの湾曲をなす現象をなくすように改良を加えたものである。   As described above, the present invention eliminates the phenomenon that the steel cord is bent at the abutting portion in the endless structure in which the steel cords at both ends of the long rubber track substrate are overlapped and vulcanized. This is an improvement.

本第１発明の要旨は、長尺で有端のゴムクロ−ラ基体であって、当該ゴムクロ−ラ基体は長手方向に向かってスチ−ルコ−ドを埋設すると共に、ゴムクロ−ラ基体の両端部よりスチ−ルコ−ドを突出させ、当該突出したスチ−ルコ−ドを重ね合わせて加硫接着してなるエンドレス構造であって、重ね合わせたスチ−ルコ−ド先端に対応する一方側のスチ−ルコ−ドを、前記スチ−ルコ−ド先端より遠ざける方向にウエ−ブをかけたエンドレス構造にかかるものである。   The gist of the first aspect of the invention is a long and end rubber roller base, which has a steel cord embedded in the longitudinal direction and both ends of the rubber track base. Further, the steel cord is protruded, and the protruding steel cords are overlapped and vulcanized and bonded to each other. The endless structure corresponds to the end of the stacked steel cords. -An endless structure in which the cord is waved in a direction away from the tip of the steel cord.

本第２発明の要旨は、長尺で有端のゴムクロ−ラ基体であって、当該ゴムクロ−ラ基体は長手方向に向かってスチ−ルコ−ドを埋設すると共に、ゴムクロ−ラ基体の両端部よりスチ−ルコ−ドを突出させ、当該突出したスチ−ルコ−ドを重ね合わせて加硫接着してなるエンドレス構造であって、スチ−ルコ−ド先端に対応する一方側のスチ−ルコ−ドに対し、未加硫ゴム材料或いは加硫ゴム材料を貼着して重ね合わせたことを特徴とするゴムクロ−ラのエンドレス構造にかかるものである。   The gist of the second invention is a long and end rubber roller base, which has a steel cord embedded in the longitudinal direction and both ends of the rubber track base. A steel cord on one side corresponding to the tip of the steel cord, having an endless structure in which the steel cord is further protruded and the protruding steel cords are overlapped and vulcanized and bonded together. The present invention relates to an endless structure of a rubber crawler characterized in that an unvulcanized rubber material or a vulcanized rubber material is attached to and superposed on a rubber layer.

本発明により、スチ−ルコ−ドのオ−バ−ラップ部の先端近傍の歪みが大幅に緩和され、内側（転輪側）のゴム亀裂の抑止、スチ−ルコ−ドの腐食切断等の不具合が改善されたものである。   According to the present invention, distortion in the vicinity of the tip of the overlap portion of the steel cord is greatly relieved, and the inner side (roller side) rubber cracks are suppressed, and the corrosion of the steel cord is broken. Is an improvement.

エンドレス構造の加硫にあって、突き合わせ部のゴム（未加硫或いは半加硫）のボリュ−ムが少ない場合、外側（ラグ側）からのゴムの流動が発生し、このため、スチ−ルコ−ドもゴムの流れに引きずられ、内側（転輪側）に落ち込む現象がある。かかる現象が起きると、一方のスチ−ルコ−ド（内側）の先端との間が狭まり、ここに歪みが生じることによってゴム切れが発生し、ゴム欠落に発生することになる。更に、スチ−ルコ−ドが引き込まれることによりこのスチ−ルコ−ドとゴムクロ−ラの内側表面との間隔即ちゴム厚が少なくなり、外力に対する干渉力が小さくなり、ここでもゴムに亀裂が入る等の欠陥が見られる。   In the case of vulcanization with an endless structure, when there is little volume of rubber (uncured or semi-cured) at the butt portion, rubber flows from the outside (lug side), and this is why There is also a phenomenon that the door is dragged by the rubber flow and falls inside (the wheel side). When such a phenomenon occurs, the space between the tip of one steel code (inner side) is narrowed, and distortion occurs here, resulting in rubber breakage and loss of rubber. Further, when the steel cord is pulled in, the distance between the steel cord and the inner surface of the rubber crawler, that is, the rubber thickness is reduced, the interference force against the external force is reduced, and the rubber is also cracked here. Defects such as are seen.

本発明はかかる知見に基づいてなされたものであり、その第１はゴム流れによって引きずられる側のスチ−ルコ−ドのかかる部位を、引きずられる方向と反対側、具体的には外側に向けて予めウエ−ブをかけておくものである。このことにより、例えゴムと共に引きずられたとしても内側に大きく落ち込むことはなくなり、通常は若干ウエ−ブの残った状態でエンドレス構造となるものである。これによってかかる部位への歪みの集中が避けられることとなったのである。かかるウエ−ブの高さはゴムクロ−ラの大きさやスチ−ルコ−ドの種類によっても異なるが、約３〜５ｍｍの高さが有れば十分である。   The present invention has been made on the basis of such knowledge, and the first is that the portion of the steel code on the side dragged by the rubber flow is directed to the side opposite to the dragged direction, specifically to the outside. A wave is applied in advance. As a result, even if dragged with the rubber, it will not fall greatly inward, and normally an endless structure is obtained with a little wave remaining. This avoids the concentration of strain on the site. The height of such a wave varies depending on the size of the rubber crawler and the type of steel code, but it is sufficient if the height is about 3 to 5 mm.

その第２は、ゴム流れによって引きずられる側のスチ−ルコ−ドのかかる部位に、未加硫ゴム材料或いは加硫ゴム材料を貼着しておくものであり、このことにより、例えゴムと共に引きずられたとしても内側に大きく落ち込むことがないエンドレス構造となるものである。これによってかかる部位への歪みの集中が避けられることとなったのである。   Secondly, an unvulcanized rubber material or a vulcanized rubber material is stuck on a portion of the steel cord that is dragged by the rubber flow. Even if it is, it will be an endless structure that does not fall down greatly inside. This avoids the concentration of strain on the site.

尚、ゴムクロ−ラには通常芯金が埋設されるが、かかる芯金の直上は歪みの集中が少ない。このため、スチ−ルコ−ドの先端をこの上に置き、他方のウエ−ブもかかる芯金に対応して配置するのが最良の形態である。   In addition, although the core metal is normally embedded in the rubber track, the concentration of distortion is small immediately above the core metal. For this reason, it is best to place the tip of the steel cord on this, and to arrange the other wave corresponding to the cored bar.

以下、実施例をもって本発明を更に詳細に説明する。
図２は本第１発明の第１実施例を示すエンドレス部の図であり、重ね合わされた内側のスチ−ルコ−ド２の先端２ｂ０ に対応する外側のスチ−ルコ−ド２にウエ−ブ１１がかけられた例である。特にこの例は芯金５、５間にスチ−ルコ−ド２ｂ側の先端２ｂ０ 及びウエ−ブ１１が配置されたものである。 Hereinafter, the present invention will be described in more detail with reference to examples.
FIG. 2 is a view of the endless portion showing the first embodiment of the first invention. The wave is applied to the outer steel cord 2 corresponding to the tip 2b0 of the superposed inner steel cord 2. FIG. 11 is an example applied. In particular, in this example, a tip 2b0 and a wave 11 on the side of the steel cord 2b are arranged between the cores 5 and 5.

かかるエンドレス構造にあって、エンドレス加硫の際にスチ−ルコ−ド２ａが内側に引っ張られた場合でも直接的にはウエ−ブ１１の部分が引っ張られるだけであり、従って、スチ−ルコ−ド２ｂ０ とウエ−ブ１１の間隔は狭くならず、かつ、内周面との間の厚みを十分に保たれるものであり、従来のエンドレス構造の場合と異なり耐久性に大きな違いが発現されたものである。   In such an endless structure, even when the steel cord 2a is pulled inward during endless vulcanization, only the portion of the wave 11 is pulled directly. The distance between the cable 2b0 and the wave 11 is not narrowed, and the thickness between the inner peripheral surface is sufficiently maintained, and a great difference in durability is exhibited unlike the conventional endless structure. It is a thing.

図３は本第１発明の第２実施例を示すエンドレス部の図であり、この例では、芯金５０ がエンドレス部にあり、重ね合わされた内側のスチ−ルコ−ド２の先端２ｂがこの芯金５０ 上に配置されている。一方、外側のスチ−ルコ−ド２ａの一部にウエ−ブ１１がかけられ、これが芯金５０ 上に配置された例である。   FIG. 3 is a view of an endless portion showing a second embodiment of the first invention. In this example, the cored bar 50 is in the endless portion, and the tip 2b of the superposed inner steel cord 2 is the endless portion 2b. It is arranged on the core metal 50. On the other hand, the wave 11 is hung on a part of the outer steel cord 2a, and this is an example in which it is disposed on the cored bar 50.

かかるエンドレス構造にあって、例えゴム加硫の際にスチ−ルコ−ド２ａが内側に引っ張られた場合でも芯金５０ の存在によりウエ−ブ１１が多少引っ張られるだけであり、スチ−ルコ−ド２ａ、２ｂ間の間隔は狭くならず、かつ、ウエ−ブ１１内にもゴムが充満することから、スチ−ルコ−ド先端２ｂ０ とウエ−ブ１１間は広く保持され、かつこの部位にゴムが充満しており、かかる部位に歪みが加えられてもその緩和力は大きく、これ又、従来のエンドレス構造の場合と異なり耐久性に大きな違いが発現されたものである。   In such an endless structure, even when the steel cord 2a is pulled inward during rubber vulcanization, the wave 11 is only pulled slightly due to the presence of the core 50, and the steel cord Since the distance between the wires 2a and 2b is not narrow and the rubber is also filled in the wave 11, the distance between the steel cord tip 2b0 and the wave 11 is kept wide, and this portion The rubber is full, and even if a strain is applied to such a portion, the relaxation force is large, and, unlike the conventional endless structure, a great difference is expressed in durability.

図４は本第２発明の第１実施例を示すエンドレス部の図であり、重ね合わされた内側のスチ−ルコ−ド２の先端２ｂ０ に対応する外側のスチ−ルコ−ド２にゴム材料２１を貼着してなる例である。特にこの例は芯金５、５間にスチ−ルコ−ド２ｂ側の先端２ｂ０ 及びゴム材料２１が配置されたものである。   FIG. 4 is a view of the endless portion showing the first embodiment of the second invention. The rubber material 21 is attached to the outer steel cord 2 corresponding to the front end 2b0 of the inner steel cord 2 which is overlapped. It is an example formed by sticking. In particular, in this example, the tip 2b0 on the side of the steel cord 2b and the rubber material 21 are arranged between the cores 5 and 5.

かかるエンドレス構造にあって、エンドレス加硫の際にスチ−ルコ−ド２ａが内側に引っ張られた場合でも直接的にはゴム材料２１が引っ張られ、このゴム材料２１が流動するもので、スチ−ルコ−ド２ａは実質的にその位置を変えることがなく、従って、スチ−ルコ−ド２ｂ０ とスチ−ルコ−ド２ａの間隔は狭くならず、かつ、内周面との間の厚みを十分に保たれるものであり、従来のエンドレス構造の場合と異なり耐久性に大きな違いが発現されたものである。   In such an endless structure, even when the steel cord 2a is pulled inward during the endless vulcanization, the rubber material 21 is pulled directly, and the rubber material 21 flows. The code 2a does not substantially change its position. Therefore, the distance between the steel code 2b0 and the steel code 2a is not narrowed, and the thickness between the inner peripheral surface is sufficient. Unlike the case of the conventional endless structure, a great difference in durability is expressed.

図５は本発明の第２実施例を示すエンドレス部の図であり、この例では、芯金５０ がエンドレス部にあり、重ね合わされた内側のスチ−ルコ−ド２の先端２ｂがこの芯金５０ 上に配置されている。一方、外側のスチ−ルコ−ド２ａに貼着されたゴム材料２１も又芯金５０ 上に配置された例である。   FIG. 5 is a view of an endless portion showing a second embodiment of the present invention. In this example, the cored bar 50 is in the endless part, and the tip 2b of the superposed inner steel cord 2 is the cored bar. 50 is arranged above. On the other hand, the rubber material 21 adhered to the outer steel cord 2a is also an example in which the rubber material 21 is also disposed on the cored bar 50.

かかるエンドレス構造にあって、例えゴム加硫の際にスチ−ルコ−ド２ａが内側に引っ張られた場合でも芯金５０ の存在によりゴム材料２１が多少引っ張られるだけであり、スチ−ルコ−ド２ａ、２ｂ間の間隔は狭くならず、この間にゴムが充満しており、かかる部位に歪みが加えられてもその緩和力は大きく、これ又、従来のエンドレス構造の場合と異なり耐久性に大きな違いが発現されたものである。   In such an endless structure, even when the steel cord 2a is pulled inward at the time of rubber vulcanization, the rubber material 21 is only slightly pulled due to the presence of the cored bar 50. The space between 2a and 2b is not narrow, and the space is filled with rubber, and even if a strain is applied to such a part, the relaxation force is large, and also unlike the conventional endless structure, the durability is large. The difference is expressed.

本発明は以上の通りであり、スチ−ルコ−ドのオ−バ−ラップ部の先端近傍が大きく改善されたものであり、かかるエンドレス構造をなす全てのゴムクロ−ラに適用できるものであり、その技術的寄与は極めて大きい。   The present invention is as described above, and the vicinity of the tip of the overlap portion of the steel cord is greatly improved, and can be applied to all rubber crawlers having such an endless structure. The technical contribution is extremely large.

図１は従来のゴムクロ−ラのエンドレス構造を示す図である。FIG. 1 is a view showing an endless structure of a conventional rubber track. 図２は本第１発明のエンドレス構造の第１例を示す図である。FIG. 2 is a view showing a first example of the endless structure of the first invention. 図３は本第１発明のエンドレス構造の第２例を示す図である。FIG. 3 is a view showing a second example of the endless structure of the first invention. 図４は本第２発明のエンドレス構造の第１例を示す図である。FIG. 4 is a view showing a first example of the endless structure of the second invention. 図５は本第２発明のエンドレス構造の第２例を示す図である。FIG. 5 is a view showing a second example of the endless structure of the second invention.

符号の説明Explanation of symbols

１‥ゴムクロ−ラ基体、
１ａ、１ｂ‥ゴムクロ−ラ基体の両端、
２‥スチ−ルコ−ド、
２ａ、２ｂ‥スチ−ルコ−ドの両端、
２ｂ０ ‥スチ−ルコ−ド２ｂの先端、
３‥湾曲部、
４‥湾曲部内側のゴム部、
５、５０ ‥芯金、
１１‥ウエ−ブ、
２１‥ゴム材料。 1. Rubber rubber substrate,
1a, 1b ... both ends of the rubber track base,
2 Steel code,
2a, 2b ... both ends of the steel cord,
2b0 ... the tip of the steel cord 2b,
3. Curved part,
4. The rubber part inside the curved part,
5, 50 ... core,
11. Wave,
21. Rubber material.

Claims (7)

長尺で有端のゴムクロ−ラ基体であって、当該ゴムクロ−ラ基体は長手方向に向かってスチ−ルコ−ドを埋設すると共に、ゴムクロ−ラ基体の両端部よりスチ−ルコ−ドを突出させ、当該突出したスチ−ルコ−ドを重ね合わせて加硫接着してなるエンドレス構造であって、重ね合わせたスチ−ルコ−ド先端に対応する一方側のスチ−ルコ−ドを、前記スチ−ルコ−ド先端より遠ざける方向にウエ−ブをかけたことを特徴とするゴムクロ−ラのエンドレス構造。   A rubber crawler base having a long end and a steel crawler that embeds a steel cord in the longitudinal direction and projects the steel cord from both ends of the rubber crawler base. An endless structure in which the protruding steel cords are superposed and vulcanized and bonded, and the steel cord on one side corresponding to the end of the superposed steel cord is attached to the steel. An endless structure of a rubber crawler characterized in that a wave is applied in a direction away from the tip of the cord. 長尺方向に一定のピッチをもって芯金が埋設された請求項１記載のゴムクロ−ラのエンドレス構造。   2. The endless structure of a rubber crawler according to claim 1, wherein the cored bar is embedded with a constant pitch in the longitudinal direction. エンドレス構造における外側に位置するスチ−ルコ−ドにウエ−ブをかけた請求項１又は２記載のゴムクロ−ラのエンドレス構造。   3. An endless structure for a rubber crawler according to claim 1, wherein a steel cord positioned outside the endless structure is waved. 芯金上に前記ウエ−ブが配置された請求項１乃至３記載のゴムクロ−ラのエンドレス構造。   4. An endless structure of a rubber crawler according to claim 1, wherein the wave is disposed on a cored bar. 長尺で有端のゴムクロ−ラ基体であって、当該ゴムクロ−ラ基体は長手方向に向かってスチ−ルコ−ドを埋設すると共に、ゴムクロ−ラ基体の両端部よりスチ−ルコ−ドを突出させ、当該突出したスチ−ルコ−ドを重ね合わせて加硫接着してなるエンドレス構造であって、スチ−ルコ−ド先端に対応する一方側のスチ−ルコ−ドに対し、ゴム材料を貼着して重ね合わせたことを特徴とするゴムクロ−ラのエンドレス構造。   A rubber crawler base having a long end and a steel crawler that embeds a steel cord in the longitudinal direction and projects the steel cord from both ends of the rubber crawler base. The endless structure is formed by stacking the protruding steel cords and vulcanizing and adhering them, and a rubber material is applied to the one side steel cord corresponding to the end of the steel cord. An endless structure of a rubber crawler characterized by wearing and overlapping. 前記ゴム材料が未加硫ゴムである請求項５記載のゴムクロ−ラのエンドレス構造。   6. An endless structure of a rubber crawler according to claim 5, wherein the rubber material is unvulcanized rubber. 前記ゴム材料が加硫ゴムである請求項５記載のゴムクロ−ラのエンドレス構造。
造。 6. An endless structure of a rubber crawler according to claim 5, wherein the rubber material is vulcanized rubber.
Made.
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JP2008273449A (en) * 2007-05-01 2008-11-13 Sumitomo Rubber Ind Ltd Elastic crawler and method of manufacturing the elastic crawler
WO2014129660A1 (en) * 2013-02-25 2014-08-28 株式会社ブリヂストン Track

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JPH03295776A (en) * 1990-04-14 1991-12-26 Bridgestone Corp Endless structure for rubber crawler
JP2000159162A (en) * 1998-11-27 2000-06-13 Bridgestone Corp Connection structure of rubber crawler
JP2000247272A (en) * 1999-03-01 2000-09-12 Bridgestone Corp Rubber crawler and its molding method

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JPS6414582A (en) * 1987-07-06 1989-01-18 Matsushita Refrigeration Heat insulating box body
JPH03295776A (en) * 1990-04-14 1991-12-26 Bridgestone Corp Endless structure for rubber crawler
JP2000159162A (en) * 1998-11-27 2000-06-13 Bridgestone Corp Connection structure of rubber crawler
JP2000247272A (en) * 1999-03-01 2000-09-12 Bridgestone Corp Rubber crawler and its molding method

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Publication number Priority date Publication date Assignee Title
JP2008273449A (en) * 2007-05-01 2008-11-13 Sumitomo Rubber Ind Ltd Elastic crawler and method of manufacturing the elastic crawler
US7883160B2 (en) 2007-05-01 2011-02-08 Sumitomo Rubber Industries, Ltd. Elastic crawler and elastic crawler manufacturing method
WO2014129660A1 (en) * 2013-02-25 2014-08-28 株式会社ブリヂストン Track
JP2014162353A (en) * 2013-02-25 2014-09-08 Bridgestone Corp Crawler
CN105008214A (en) * 2013-02-25 2015-10-28 株式会社普利司通 Track
EP2960142A4 (en) * 2013-02-25 2016-05-04 Bridgestone Corp Track
US10479426B2 (en) 2013-02-25 2019-11-19 Bridgestone Corporation Crawler

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