JP2015104925A - Rubber crawler and method for manufacturing the same - Google Patents
Rubber crawler and method for manufacturing the same Download PDFInfo
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- JP2015104925A JP2015104925A JP2013246142A JP2013246142A JP2015104925A JP 2015104925 A JP2015104925 A JP 2015104925A JP 2013246142 A JP2013246142 A JP 2013246142A JP 2013246142 A JP2013246142 A JP 2013246142A JP 2015104925 A JP2015104925 A JP 2015104925A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 202
- 239000005060 rubber Substances 0.000 title claims abstract description 202
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 96
- 239000010959 steel Substances 0.000 claims abstract description 96
- 230000002093 peripheral effect Effects 0.000 claims abstract description 70
- 238000000465 moulding Methods 0.000 claims description 39
- 238000004073 vulcanization Methods 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 24
- 239000004744 fabric Substances 0.000 claims description 10
- 239000002759 woven fabric Substances 0.000 claims description 7
- 238000005476 soldering Methods 0.000 abstract description 15
- 238000005452 bending Methods 0.000 abstract description 4
- 238000005304 joining Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 238000009940 knitting Methods 0.000 abstract 1
- 239000004753 textile Substances 0.000 abstract 1
- 239000012783 reinforcing fiber Substances 0.000 description 39
- 238000004804 winding Methods 0.000 description 26
- 230000009191 jumping Effects 0.000 description 10
- 230000003014 reinforcing effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000009719 polyimide resin Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920001875 Ebonite Polymers 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
Description
本発明は、コンバイン、トラクタ等の農業機械、バックホー等の建設機械のクローラ式走行装置に使用されるゴムクローラに関する。 The present invention relates to a rubber crawler used in a crawler type traveling device of an agricultural machine such as a combine or tractor, or a construction machine such as a backhoe.
コンバイン、トラクタ、バックホー等のクローラ式走行装置に使用されるゴムクローラは、周方向に作用する大きな張力に耐えられるように、スチールコードが複数並べられて帯状に形成された抗張体が、クローラ周方向に１周巻回された状態で埋め込まれている。
抗張体は、従来、クローラ本体の周長よりも若干長く帯状に形成されたものを一周させ、その両端がクローラ本体の厚さ方向に重ね合わされてクローラ本体に埋め込まれることが多かった。
A rubber crawler used in a crawler type traveling device such as a combine, tractor, backhoe, etc. is a crawler made of a tensile body formed in a strip shape by arranging a plurality of steel cords so as to withstand a large tension acting in the circumferential direction. It is embedded in a state of being wound once in the circumferential direction.
Conventionally, the tensile body has been made to wrap around a belt-shaped one that is slightly longer than the circumference of the crawler body, and both ends thereof are overlapped in the thickness direction of the crawler body and are often embedded in the crawler body.
しかし、このような構造のゴムクローラは、抗張体の両端が重ね合わされた部分の剛性が他の部分に比べて高くなり、この部分が駆動輪および従動輪を通過するときの歪みによって、抗張体からのゴムのはく離等が生じ易い。そこで、抗張体を、１本のスチールコードをまたはこのスチールコード複数本で形成された帯状コード単位が周方向にらせん状（スパイラル状）に巻き回しされたものとすることにより、この問題を解決する技術が提案されている（特許文献１）。 However, in the rubber crawler having such a structure, the rigidity of the portion where both ends of the tensile body are overlapped is higher than that of the other portions, and this portion is resistant to distortion due to distortion when the portion passes through the driving wheel and the driven wheel. The rubber peels easily from the tension body. Therefore, this problem can be solved by assuming that the tensile cord is formed of one steel cord or a belt-like cord unit formed by a plurality of steel cords wound in a spiral shape in the circumferential direction. A technique for solving this problem has been proposed (Patent Document 1).
特許文献１に提案されたスパイラル状の抗張体は、（らせん状に）巻き回されたスチールコードの端が、ハンダ付け等の加熱を要する手段で隣のスチールコードに固定される（段落００１８）。
ところで、抗張体として使用されるいわゆるスチールコードは、鋼鉄の線材がゴムで被覆されており、ハンダ付け等を行うにはスチールコードの端近傍およびこれを固定する隣のスチールコードの被覆材を剥がす作業が必要である。
In the spiral tensile body proposed in Patent Document 1, the end of a steel cord wound (in a spiral) is fixed to an adjacent steel cord by means such as soldering (paragraph 0018). ).
By the way, a so-called steel cord used as a tensile body has a steel wire coated with rubber, and in order to perform soldering, a steel cord covering near the end of the steel cord and the adjacent steel cord for fixing it is used. Peeling work is necessary.
巻き回し作業の途中でスチールコードが不足したときは、巻き終わりの端が隣のスチールコードにハンダ付け等により固着されるか、または、すでに巻き終えたスチールコードの端に新たなスチールコードの端がハンダ付け等により連結されて、巻き回し作業が再開される。
スパイラル状に巻き回されたスチールコードの端を隣のスチールコードに固定する作業、および不足分のスチールコードを繋ぎ足す作業のいずれも、ゴム被覆されたスチールコードがゴムクローラ成形用のゴムに巻き回された状態で行われる。
If there is a shortage of steel cord during winding, the end of winding is fixed to the adjacent steel cord by soldering, or the end of a new steel cord is attached to the end of the already wound steel cord. Are connected by soldering or the like, and the winding operation is resumed.
Both the work of fixing the end of the spirally wound steel cord to the adjacent steel cord and the task of adding the missing steel cord are wrapped around the rubber crawler forming rubber. It is done in a rotated state.
しかし、スチールコードが巻き回されたゴムクローラ成形用のゴムは未加硫であるため、ハンダ付け（溶接）作業等の熱により、成形前に接合箇所周りのゴムの加硫が進行するという問題がある。また、ハンダ付け部分はゴムに覆われず鋼鉄の線材がむきだしであるため、ゴムクローラ成形後の周りのゴムとの接着不良が生じ易いという問題がある。
本発明は、上述の問題に鑑みてなされたもので、ハンダ付け等による加熱接合箇所を有しないスパイラル状のスチールコードが埋め込まれたゴムクローラ、および端部を加熱接合しないでスパイラル状のスチールコードを埋め込むゴムクローラの製造方法を提供することを目的とする。
However, since rubber for crawler molding with steel cords wound around is not vulcanized, the problem is that the vulcanization of the rubber around the joint progresses before molding due to the heat of soldering (welding) etc. There is. In addition, since the soldered portion is not covered with rubber and the steel wire is exposed, there is a problem that poor adhesion to the surrounding rubber after rubber crawler molding is likely to occur.
The present invention has been made in view of the above-described problems, and is a rubber crawler embedded with a spiral steel cord that does not have a heat-joined portion by soldering or the like, and a spiral steel cord without heat-joining the end portion. It is an object of the present invention to provide a method for manufacturing a rubber crawler embedding a rubber.
本発明に係るゴムクローラは、芯金の翼部の外周側にスパイラル状に巻き回されたスチールコードを備えたゴムクローラである。ゴムクローラは、幅方向から見たときに、巻き回されたスチールコードの両端がいずれも芯金の翼部の外周側に位置する。スチールコードの両端の外周側のいずれにもスチールコードの両端を覆うように織物、編み物もしくはシートが埋め込まれ、またはスチールコードの両端の外周側のゴムの硬度が他の部分のゴ
ムの硬度に比べて高い。
The rubber crawler according to the present invention is a rubber crawler provided with a steel cord wound spirally around the outer peripheral side of a wing portion of a core metal. When viewed from the width direction of the rubber crawler, both ends of the wound steel cord are positioned on the outer peripheral side of the wing portion of the core metal. Woven fabric, knitted fabric or sheet is embedded on both outer circumference sides of the steel cord so as to cover both ends of the steel cord, or the hardness of rubber on the outer circumference side of both ends of the steel cord is compared with the hardness of rubber in other parts Is expensive.
好ましくは、ゴムクローラを幅方向から見たときに、スチールコードの両端近傍における翼部の外周側に位置する部分がスチールコードの他の部分に比べて翼部に近づけられる。
本発明に係るゴムクローラの製造方法は、芯金の翼部の外周側にスパイラル状に巻き回されたスチールコードを備えたゴムクローラの製造方法である。ゴムクローラの製造方法は、その加硫成形前において、スパイラル状に巻き回されたスチールコードの両端をいずれも翼部の外周側に位置させる。次に、スチールコードの両端およびその近傍の外周側にスチールコードの両端を覆うように織物、編み物もしくはシートを配し、またはスチールコードの両端およびその近傍の外周側にスチールコードの両端を覆うように他の部分の未加硫ゴムよりも硬度の高い未加硫ゴムを配する。そして、その後に加硫成形を行う。
Preferably, when the rubber crawler is viewed from the width direction, a portion located on the outer peripheral side of the wing portion in the vicinity of both ends of the steel cord is brought closer to the wing portion than the other portions of the steel cord.
The method for producing a rubber crawler according to the present invention is a method for producing a rubber crawler provided with a steel cord wound spirally around the outer peripheral side of a wing portion of a core metal. In the rubber crawler manufacturing method, both ends of the steel cord wound in a spiral shape are positioned on the outer peripheral side of the wing before the vulcanization molding. Next, a woven fabric, a knitted fabric or a sheet is arranged so as to cover both ends of the steel cord and the outer peripheral side in the vicinity thereof, or cover both ends of the steel cord on both ends of the steel cord and in the vicinity thereof. An unvulcanized rubber having a higher hardness than other portions of the unvulcanized rubber is disposed. Then, vulcanization molding is performed.
好ましくは、加硫成形前に、スチールコードの両端近傍における芯金の翼部の外周側に位置する部分をスチールコードの他の部分に比べて翼部に近づけ、その後に加硫成形を行う。 Preferably, before vulcanization molding, a portion located on the outer peripheral side of the wing portion of the core metal in the vicinity of both ends of the steel cord is brought closer to the wing portion than the other portions of the steel cord, and then vulcanization molding is performed.
本発明によると、ハンダ付け等による加熱接合箇所を有しないスパイラル状のスチールコードが埋め込まれたゴムクローラ、および端部を加熱接合しないでスパイラル状のスチールコードを埋め込むゴムクローラの製造方法を提供することができる。 According to the present invention, there are provided a rubber crawler in which a spiral steel cord not having a heat-joined portion by soldering or the like is embedded, and a method for manufacturing a rubber crawler in which a spiral steel cord is embedded without heat-bonding an end portion. be able to.
図１はゴムクローラ１の製造過程における芯金４の翼部１２にらせん状に巻き回された並列被覆体１５の様子を示す図、図２は図１におけるＡ−Ａ矢視図である。
ゴムクローラ１は、クローラ本体２、ラグ３、芯金４および一対の抗張体５等からなる。
クローラ本体２は、肉厚な帯状のゴムにより形成された大きな輪である。ラグ３は、輪であるクローラ本体２の外周面から外方に突出した状態で、クローラ本体２の内方からクローラ本体２の幅方向端に向けて延びている。ラグ３は、クローラ本体２の周方向に一定の間隔で複数設けられる。以下「幅方向」というときはクローラ本体２における幅方向をいい、「周方向」というときはクローラ本体２における周方向をいうものとする。「外周」および「内周」の語は、「輪」であるクローラ本体２（ゴムクローラ１）におけるそれぞれ「外周」および「内周」をいう。
FIG. 1 is a view showing a state of a parallel covering body 15 spirally wound around a wing portion 12 of a metal core 4 in the manufacturing process of the rubber crawler 1, and FIG. 2 is a view taken along the line AA in FIG.
The rubber crawler 1 includes a crawler body 2, a lug 3, a cored bar 4, a pair of tensile bodies 5, and the like.
The crawler body 2 is a large ring formed of a thick band-like rubber. The lug 3 extends from the inner side of the crawler main body 2 toward the end in the width direction of the crawler main body 2 in a state of protruding outward from the outer peripheral surface of the crawler main body 2 that is a ring. A plurality of lugs 3 are provided at regular intervals in the circumferential direction of the crawler body 2. Hereinafter, the “width direction” refers to the width direction in the crawler body 2, and the “circumferential direction” refers to the circumferential direction in the crawler body 2. The terms “outer periphery” and “inner periphery” refer to “outer periphery” and “inner periphery”, respectively, in the crawler body 2 (rubber crawler 1), which is a “ring”.
ラグ３は、幅方向の両側に面対称に、または幅方向両側で交互に千鳥状に配される。ラグ３は、幅方向の一方の端から他方の端に連続して設けられることがある。
芯金４は、金属等の硬質材料によって形成される。芯金４は、全体として細長い形状である。芯金４の中央には、芯金４の長手方向に間隔を有して一方の表面から同方向に突出する一対の突起部１１が設けられている。芯金４における突起部１１から長手方向外方端までの部分を翼部１２という。
The lugs 3 are arranged symmetrically on both sides in the width direction, or alternately in a staggered manner on both sides in the width direction. The lug 3 may be provided continuously from one end in the width direction to the other end.
The cored bar 4 is formed of a hard material such as metal. The cored bar 4 has an elongated shape as a whole. In the center of the cored bar 4, a pair of protrusions 11 are provided that protrude in the same direction from one surface with an interval in the longitudinal direction of the cored bar 4. A portion from the protruding portion 11 to the outer end in the longitudinal direction of the cored bar 4 is referred to as a wing portion 12.
翼部１２は、板状であって、突起部１１近傍から芯金４の長手方向の端に向かうに伴い厚さおよび幅が小さくなっている。翼部１２の厚さおよび幅は、この形状に限られず、芯金４に求められる機能により、任意に決定される。
芯金４は、突起部１１の突出する側がゴムクローラ１の内周側となるように、複数が周方向に等間隔に配されて、クローラ本体２に埋め込まれている。
The wing part 12 is plate-shaped, and its thickness and width are reduced from the vicinity of the projection part 11 toward the longitudinal end of the cored bar 4. The thickness and width of the wing part 12 are not limited to this shape, and are arbitrarily determined depending on the function required of the cored bar 4.
A plurality of the cored bars 4 are embedded in the crawler body 2 at equal intervals in the circumferential direction so that the protruding side of the protruding portion 11 is the inner peripheral side of the rubber crawler 1.
抗張体５は、１本のスチールコード１３が、またはスチールコード１３複数本を略等間隔で平行に並べて１単位とされたコード並列体が、突起部１１側から芯金４の長手方向の端側に向けて（またはこの逆方向に）、翼部１２の外周側にらせん状（スパイラル状）に巻き回されて形成される。
ゴムクローラ１の製造過程における加硫成形工程では、らせん状に巻き回される１本のスチールコード１３またはコード並列体は、あらかじめゴム１４により被覆されて使用される。ゴム１４で被覆されたスチールコード１３、およびゴム１４で被覆されたコード並列体は、例えば特開２００１−２５３３７４号公報、特開２０１３−４０４２８号公報等に記載されており、公知である。
The tensile body 5 includes a single steel cord 13 or a cord parallel body in which a plurality of steel cords 13 are arranged in parallel at substantially equal intervals to form one unit in the longitudinal direction of the core metal 4 from the protruding portion 11 side. It is formed by being wound in a spiral shape (spiral shape) on the outer peripheral side of the wing portion 12 toward the end side (or in the opposite direction).
In the vulcanization molding step in the manufacturing process of the rubber crawler 1, one steel cord 13 or cord parallel body wound in a spiral shape is used by being covered with rubber 14 in advance. The steel cord 13 covered with the rubber 14 and the cord parallel body covered with the rubber 14 are described in, for example, Japanese Patent Application Laid-Open Nos. 2001-253374 and 2013-40428, and are well known.
図１に示されるコード並列体は、２本のスチールコード１３を１単位とする。以下、ゴム１４で被覆されたコード並列体を「並列被覆体１５」という。
抗張体５を備えたゴムクローラ１は、例えば以下のようにして加硫成形される。
先ずゴムクローラ１の内周側の形状を形成する内側モールド（内側金型）に未加硫ゴムが充填され、芯金４が、突起部１１を内側（奥側、内周側）にして所定の位置に並べられる。続いて、芯金４の翼部の外側に、突起部１１側から翼部１２の端側に向けて並列被覆体１５が巻き回される。並列被覆体１５は、巻き始めの端（以下「始端１６」という）が、クローラ本体２の厚さ方向から見たときに、芯金４の翼部１２の投影位置（翼部１２に重なる位置）に配される。以下単に「厚さ方向」というときは、クローラ本体２における厚さ方向をいう。
The cord parallel body shown in FIG. 1 has two steel cords 13 as one unit. Hereinafter, the cord parallel body covered with the rubber 14 is referred to as a “parallel sheath 15”.
The rubber crawler 1 provided with the tensile body 5 is vulcanized and molded as follows, for example.
First, the inner mold (inner mold) that forms the shape of the inner circumference side of the rubber crawler 1 is filled with unvulcanized rubber, and the cored bar 4 has a predetermined portion 11 inside (back side, inner circumference side). It is arranged in the position of. Subsequently, the parallel covering 15 is wound around the outer side of the wing portion of the core metal 4 from the protruding portion 11 side toward the end side of the wing portion 12. The parallel covering 15 has a winding start end (hereinafter referred to as “start end 16”) when projected from the wing part 12 of the cored bar 4 when viewed from the thickness direction of the crawler body 2 (position overlapping the wing part 12). ). Hereinafter, the “thickness direction” simply refers to the thickness direction in the crawler body 2.
並列被覆体１５の巻き回しが所定の周回数繰り返されると、始端１６が重なる芯金４の翼部１２に巻き終わりの端（以下「終端１７」という）を（厚さ方向に）重ねて、巻き回しが終了される。終端１７は、図１におけるＡ−Ａ矢視方向から見たとき、その端面が始端１６の端面に対向し、始端１６の端面と間隔を有する。
終端１７を、Ａ−Ａ矢視方向から見たとき、その近傍が始端１６の近傍に重なるように位置させてもよい。終端１７を、始端１６が重なる芯金４に対して周方向両側で隣り合ういずれかの芯金４の翼部１２に重ならせてもよい。
When the winding of the parallel covering 15 is repeated a predetermined number of times, the end of winding (hereinafter referred to as “end 17”) is overlapped (in the thickness direction) on the wing portion 12 of the core metal 4 where the start end 16 overlaps, Winding is finished. When viewed from the direction of arrows AA in FIG. 1, the end surface 17 is opposed to the end surface of the start end 16 and has a distance from the end surface of the start end 16.
The end 17 may be positioned so that its vicinity overlaps the vicinity of the start 16 when viewed from the direction of arrows AA. The terminal end 17 may be overlapped with the wing part 12 of any one of the core bars 4 adjacent on both sides in the circumferential direction with respect to the core bar 4 on which the start end 16 overlaps.
始端１６からその近傍および終端１７からその近傍を内周側に折り曲げることにより、これらの部分を並列被覆体１５における他の部分よりも芯金４に近づけるのが好ましい（図２の二点鎖線参照）。
始端１６および終端１７の外周側に、補強繊維が配される。ゴムクローラ１では、矩形に裁断された補強繊維２１が、始端１６および終端１７を含んで、（芯金４の）翼部１２外方で重なる並列被覆体１５の部分を覆う。
It is preferable that these portions are made closer to the cored bar 4 than the other portions in the parallel covering 15 by bending the vicinity from the start end 16 and the vicinity thereof from the end 17 to the inner peripheral side (see the two-dot chain line in FIG. 2). ).
Reinforcing fibers are arranged on the outer peripheral side of the start end 16 and the end end 17. In the rubber crawler 1, the reinforcing fiber 21 cut into a rectangle includes the start end 16 and the end end 17 and covers a portion of the parallel covering 15 that overlaps outside the wing portion 12 (of the core metal 4).
補強繊維２１には、綿または麻によるキャンバス（帆布）に換えて、ナイロン等の他の種類の繊維による織物、ポリイミド樹脂シート等の樹脂シートまたは樹脂シートが編まれたもの（編み物）等を使用することができる。
次に、芯金４，４および並列被覆体１５の外側が、そのキャビティに未加硫ゴムが充填された外側モールド（外側金型）で覆われ、内側モールドと外側モールドとが結合される。外側モールドは、ゴムクローラ１におけるラグ３を含む外周側の形状を形成させる
キャビティ内の未加硫ゴムは、所定の温度および時間で加硫処理され、芯金４，４および抗張体５が埋め込まれたゴムクローラ１が形成される。
As the reinforcing fiber 21, a woven fabric made of other types of fibers such as nylon, a resin sheet such as a polyimide resin sheet, or a knitted fabric (knitted fabric) or the like is used instead of a canvas made of cotton or hemp. can do.
Next, the outer sides of the core bars 4 and 4 and the parallel covering 15 are covered with an outer mold (outer mold) in which the cavities are filled with unvulcanized rubber, and the inner mold and the outer mold are joined. The outer mold forms a shape on the outer peripheral side including the lug 3 in the rubber crawler 1. The unvulcanized rubber in the cavity is vulcanized at a predetermined temperature and time, and the core bars 4 and 4 and the tensile body 5 are formed. An embedded rubber crawler 1 is formed.
ところで、従来、巻き回されたスチールコードの始端および終端がそれぞれに隣り合う
スチールコードにハンダ付け等で固着されたのは、ゴムクローラが始端および終端が埋め込まれた部分で屈曲したとき、これらを含む近傍が単独で外周側に跳ね上がるのを防止するためであった。
上記したゴムクローラ１では、始端１６および終端１７を含むこれらの近傍の外周側が補強繊維２１で覆われており、始端１６、終端１７を含むこれらの近傍の外周側への跳ね上がりは、補強繊維２１によって防止される。ゴムクローラ１は、補強繊維２１を所定の場所に埋め込むことにより、その加硫成形工程において始端１６および終端１７のハンダ付け等の固着作業を行わなくとも、屈曲時のスチールコード１３，１３の端近傍の跳ね上がりを防ぐことができる。
By the way, conventionally, the start end and the end of the wound steel cord are fixed to the adjacent steel cord by soldering or the like when the rubber crawler is bent at the portion where the start end and the end are embedded. This is in order to prevent the surrounding area from jumping up to the outer peripheral side by itself.
In the rubber crawler 1 described above, the outer peripheral side in the vicinity including the starting end 16 and the terminal end 17 is covered with the reinforcing fiber 21, and the jumping to the outer peripheral side in the vicinity including the starting end 16 and the terminal end 17 is caused by the reinforcing fiber 21. Is prevented by. The rubber crawler 1 embeds the reinforcing fibers 21 in a predetermined place, so that the ends of the steel cords 13 and 13 at the time of bending can be obtained without performing fixing work such as soldering of the start end 16 and the end end 17 in the vulcanization molding process. It is possible to prevent jumping up in the vicinity.
また、始端１６、終端１７を含むこれらの近傍を、並列被覆体１５における他の部分よりも芯金４の翼部１２に近づけること、つまり始端１６、終端１７を含むこれらの近傍を意図的に内周側に位置させることにより、ゴムクローラ１の屈曲時等の始端１６、終端１７の外周側（接地側）への移動（位置変化）距離を大きくし、当該部分のゴムの亀裂発生を効果的に防止することができる。 Further, these neighborhoods including the start end 16 and the end end 17 are brought closer to the wing part 12 of the cored bar 4 than other portions in the parallel covering 15, that is, these neighborhoods including the start end 16 and the end end 17 are intentionally made. By positioning the rubber crawler 1 at the inner peripheral side, the movement (position change) distance of the starting end 16 and the terminal end 17 to the outer peripheral side (grounding side) when the rubber crawler 1 is bent is increased, and the occurrence of cracks in the rubber at the relevant part is effective. Can be prevented.
図１に示されるゴムクローラ１では、１枚の補強繊維２１により始端１６および終端１７近傍を覆ったが、２枚の補強繊維を用い、それぞれで始端１６近傍および終端１７近傍を別々に覆ってもよい。
図３は他のゴムクローラ１Ｂの製造過程におけるらせん状に巻き回された並列被覆体１５ａ，１５ｂの様子を示す図、図４は図３におけるＢ−Ｂ矢視図である。
In the rubber crawler 1 shown in FIG. 1, the vicinity of the start end 16 and the end 17 is covered with one reinforcing fiber 21, but two reinforcing fibers are used, and the vicinity of the start 16 and the end 17 are separately covered respectively. Also good.
FIG. 3 is a view showing a state of the parallel covering bodies 15a and 15b wound in a spiral shape in the manufacturing process of another rubber crawler 1B, and FIG. 4 is a view taken along arrow BB in FIG.
ゴムクローラ１Ｂを構成するクローラ本体２、ラグ３および芯金４は、ゴムクローラ１におけるものと同じである。
ゴムクローラ１Ｂは、抗張体５が、連続する１本の並列被覆体１５で形成されるのではなく、２本の並列被覆体１５ａ，１５ｂが不連続に直列に並べられて形成される。並列被覆体１５ａ，１５ｂは、それぞれの長さが並列被覆体１５より短い点を除き、２本のスチールコード１３，１３がゴム１４に被覆された並列被覆体１５と同じである。
The crawler main body 2, the lug 3 and the cored bar 4 constituting the rubber crawler 1B are the same as those in the rubber crawler 1.
In the rubber crawler 1B, the tensile body 5 is not formed by one continuous parallel covering body 15, but is formed by discontinuously arranging two parallel covering bodies 15a and 15b in series. The parallel coverings 15 a and 15 b are the same as the parallel covering 15 in which the two steel cords 13 and 13 are covered with the rubber 14 except that each length is shorter than that of the parallel covering 15.
ゴムクローラ１Ｂは、芯金４の翼部１２の外周側に最初に巻き回される並列被覆体１５（１５ａ）に、新たにボビン等に巻かれた別の並列被覆体１５（１５ｂ）が巻き足されて製造される。
ゴムクローラ１Ｂの製造における芯金４の翼部１２への並列被覆体１５ａの巻き回しの開始は、ゴムクローラ１と同様に、突起部１１側から行われる。並列被覆体１５ａの巻き始めの端１６ａ（始端１６ａ）は、厚さ方向から見たとき、芯金４の翼部１２におけるその幅の中央付近に重なる。始端１６ａを含むその近傍を、翼部１２に近づけるように内周側に折り曲げるのが好ましい（図４二点鎖線参照）。
In the rubber crawler 1B, another parallel covering 15 (15b) newly wound around a bobbin or the like is wound around the parallel covering 15 (15a) that is first wound around the outer peripheral side of the wing portion 12 of the metal core 4. It is added and manufactured.
In the production of the rubber crawler 1 </ b> B, the winding of the parallel covering body 15 a around the wing portion 12 of the core metal 4 is started from the protruding portion 11 side as in the rubber crawler 1. The winding start end 16a (starting end 16a) of the parallel covering 15a overlaps the vicinity of the center of the width of the wing portion 12 of the cored bar 4 when viewed from the thickness direction. It is preferable to bend the vicinity including the start end 16a to the inner peripheral side so as to approach the wing portion 12 (see the two-dot chain line in FIG. 4).
一つ目の並列被覆体１５ａの巻き終わりの端１７ａ（終端１７ａ）が芯金４の翼部１２に重なるように、並列被覆体１５ａが切断される。終端１７ａは、始端１６ａと同様に、その近傍が内周側に折り曲げられるのが好ましい。
次に、巻き終えた並列被覆体１５ａの終端１７ａが重なる芯金の翼部１２から、別の並列被覆体１５ｂの巻き回しが再開される。並列被覆体１５ｂの巻き回しの始端１６ｂは、既に巻かれた並列被覆体１５ａの終端１７ａからわずかに離される。二つ目の並列被覆体１５ｂの始端１６ｂ近傍も、内周側に折り曲げられるのが好ましい。
The parallel covering 15a is cut so that the winding end 17a (terminal 17a) of the first parallel covering 15a overlaps the wing part 12 of the cored bar 4. Similarly to the start end 16a, the vicinity of the end 17a is preferably bent toward the inner peripheral side.
Next, the winding of another parallel covering 15b is resumed from the wing part 12 of the cored bar where the end 17a of the parallel covering 15a that has been wound overlaps. The winding start end 16b of the parallel covering 15b is slightly separated from the end 17a of the parallel covering 15a that has already been wound. It is preferable that the vicinity of the start end 16b of the second parallel covering 15b is also bent toward the inner peripheral side.
二つ目の並列被覆体１５ｂが巻き回された後のその終端１７ｂの処理は、ゴムクローラ１の場合と同じである。並列被覆体１５ｂの終端１７ｂは、並列被覆体１５ａの始端１６ａと同じ芯金４の翼部１２に重ならせるのが好ましい。
続いて、一つ目の並列被覆体１５ａの始端１６ａを含むその近傍、および始端１６ａに（クローラ本体２の）幅方向で隣り合う二周目前後の並列被覆体１５ａの外周側が、補強繊維２１Ｂａに覆われる。補強繊維２１Ｂａが覆う範囲は、少なくとも一周目の始端１６ａを含む始端１６ａ近傍、および始端１６ａが重なる翼部１２に重なる２周目、または２，３周目の並列被覆体１５ａを含むのが好ましい。
The treatment of the end 17b after the second parallel covering 15b is wound is the same as that of the rubber crawler 1. The end 17b of the parallel covering 15b is preferably overlapped with the wing portion 12 of the same core 4 as the start end 16a of the parallel covering 15a.
Subsequently, the vicinity including the start end 16a of the first parallel covering 15a, and the outer peripheral side of the parallel covering 15a before and after the second turn adjacent to the start end 16a in the width direction (of the crawler body 2) are reinforcing fibers 21Ba. Covered with. The range covered by the reinforcing fiber 21Ba preferably includes at least the vicinity of the start end 16a including the start end 16a of the first turn, and the parallel covering 15a of the second turn or the second or third turn overlapping the wing 12 where the start end 16a overlaps. .
一つ目の並列被覆体１５ａの終端１７ａを含むその近傍および二つ目の並列被覆体１５ｂの始端１６ｂを含むその近傍の外周側、ならびに二つ目の並列被覆体１５ｂの終端１７
ｂ近傍も、一つ目の始端１６ａと同様な形態で、それぞれ補強繊維２１Ｂｂ，２１Ｂｃにより覆われる。補強繊維２１Ｂｂは、終端１７ａおよび始端１６ｂを挟む、幅方向両側の並列被覆体１５ａ，１５ｂの各一列または各二列をも覆うのが好ましい。
The vicinity including the end 17a of the first parallel covering 15a, the outer peripheral side thereof including the starting end 16b of the second parallel covering 15b, and the end 17 of the second parallel covering 15b.
The vicinity of b is also covered with reinforcing fibers 21Bb and 21Bc, respectively, in the same form as the first start end 16a. Reinforcing fiber 21Bb preferably covers each row or each two rows of parallel coverings 15a and 15b on both sides in the width direction across end 17a and start 16b.
この後、金型内で未加硫ゴムが加硫成形され、スパイラル状のスチールコード１３，１３が埋め込まれたゴムクローラ１Ｂが製造される。
ゴムクローラ１Ｂは、始端１６ａ、ハンダ付け等されることなく直列に配された終端１７ａおよび始端１６ｂ、ならびに終端１７ｂを含むこれらの近傍の外周側が補強繊維２１Ｂａ，２１Ｂｂ，２１Ｂｃで覆われている。このことにより、ゴムクローラ１Ｂは、スチールコード１３，１３における始端１６ａ，１６ｂ、終端１７ａ，１７ｂを含むこれらの近傍の外周側への跳ね上がりが防止される。ゴムクローラ１は、補強繊維２１Ｂｂが、一つ目の並列被覆体１５ａの終端１７ａおよび二つ目の並列被覆体１５ｂの始端１６ｂの外周側を覆うことにより、これらをハンダ付け等で固着して連続させる作業を行うことなく製造することができる。
Thereafter, unvulcanized rubber is vulcanized and molded in a mold, and a rubber crawler 1B in which spiral steel cords 13 and 13 are embedded is manufactured.
The rubber crawler 1B is covered with reinforcing fibers 21Ba, 21Bb, and 21Bc at the start end 16a, the end 17a and start end 16b that are arranged in series without soldering, and the vicinity of the outer periphery including the end 17b. Thus, the rubber crawler 1B is prevented from jumping to the outer peripheral side in the vicinity of the steel cords 13 and 13 including the start ends 16a and 16b and the end ends 17a and 17b. In the rubber crawler 1, the reinforcing fibers 21Bb cover the outer periphery of the end 17a of the first parallel covering 15a and the start end 16b of the second parallel covering 15b, thereby fixing them by soldering or the like. It can manufacture without performing the operation | work which makes it continue.
また、上述した補強繊維２１Ｂａ，２１Ｂｂ，２１Ｂｃを使用する加硫成形工程では、スチールコード１３，１３がスパイラル状に巻き回されたゴムクローラ１Ｂの製造に、複数本の並列被覆体１５ａ，１５ｂを使用することができ、通常廃棄される半端な長さの並列被覆体の有効活用が可能となる。
図５は他のゴムクローラ１Ｃの周方向断面図、図６はゴムクローラ１Ｃに巻き回された並列被覆体１５ａ，１５ｂの様子を示す図、図７はゴムクローラ１Ｃ加硫成形前の図５の断面に対応する断面図である。なお、図５は加硫成形後における図６のＣ−Ｃ矢視断面である。
In the vulcanization molding process using the reinforcing fibers 21Ba, 21Bb, and 21Bc described above, a plurality of parallel coverings 15a and 15b are used for manufacturing the rubber crawler 1B in which the steel cords 13 and 13 are wound in a spiral shape. It can be used, and it is possible to effectively use the half-length parallel covering that is normally discarded.
FIG. 5 is a cross-sectional view in the circumferential direction of another rubber crawler 1C, FIG. 6 is a view showing the state of the parallel coverings 15a and 15b wound around the rubber crawler 1C, and FIG. 7 is a view before vulcanization molding of the rubber crawler 1C. It is sectional drawing corresponding to a cross section. 5 is a cross-sectional view taken along the line CC of FIG. 6 after vulcanization molding.
ゴムクローラ１Ｃを構成するクローラ本体２、ラグ３および芯金４は、ゴムクローラ１，１Ｂにおけるものと同じである。
ゴムクローラ１Ｃは、抗張体５が２つの並列被覆体１５ａ，１５ｂを使用して形成されている。並列被覆体１５ａ，１５ｂは、ゴムクローラ１，１Ｂに使用された、２本のスチールコード１３，１３がゴム１４に被覆されたものである。ゴムクローラ１Ｃにおける不連続な一対のスチールコード１３，１３のそれぞれは、両端（始端１６ａ，１６ｂ、終端１７ａ，１７ｂに該当）が、厚さ方向から見たときに同じ芯金４の翼部１２に外周側で重なっている。スチールコード１３，１３のすべての端近傍は、スチールコード１３，１３の他の部分よりも翼部１２に近くなるように、内周側に折り曲げられている。折り曲げられた端近傍の外周側には、クローラ本体２を形成するゴムよりも硬度が５度以上高い、ＪＩＳ−Ｋ−６２５３、タイプＡデュロメータ硬さにおいて硬度６０〜８０度の補強ゴム２２Ｃ，２２Ｃが配されている。
The crawler body 2, the lug 3 and the cored bar 4 constituting the rubber crawler 1C are the same as those in the rubber crawlers 1 and 1B.
In the rubber crawler 1C, the tensile body 5 is formed by using two parallel covering bodies 15a and 15b. The parallel covering bodies 15a and 15b are obtained by covering the rubber 14 with two steel cords 13 and 13 used for the rubber crawlers 1 and 1B. Each of the pair of discontinuous steel cords 13, 13 in the rubber crawler 1 </ b> C has both ends (corresponding to the start ends 16 a, 16 b and the end points 17 a, 17 b) of the wing portion 12 of the same core 4 when viewed from the thickness direction. On the outer peripheral side. The vicinity of all ends of the steel cords 13 and 13 is bent toward the inner peripheral side so as to be closer to the wing portion 12 than the other portions of the steel cords 13 and 13. Reinforced rubbers 22C and 22C having a hardness of 5 degrees or more higher than the rubber forming the crawler body 2 and having a hardness of 60 to 80 degrees in JIS-K-6253, type A durometer hardness, are disposed on the outer peripheral side near the bent end. Is arranged.
つまり、ゴムクローラ１Ｃにおいて、スチールコード１３，１３のすべての端近傍は、芯金４の翼部１２と補強ゴム２２Ｃとに挟まれている。
図６，７を参照して、ゴムクローラ１Ｃの加硫成形工程では、翼部１２の外周側への並列被覆体１５ａ，１５ｂの巻き回し時にまたは巻き回しの後に、並列被覆体１５ａ，１５ｂの両端近傍が内周側に折り曲げられ、この両端近傍の外周側が、高い硬度の未加硫ゴム（加硫後の補強ゴム２２Ｃ）で覆われる。
That is, in the rubber crawler 1C, the vicinity of all ends of the steel cords 13 and 13 is sandwiched between the wing portion 12 of the cored bar 4 and the reinforcing rubber 22C.
Referring to FIGS. 6 and 7, in the vulcanization molding process of rubber crawler 1C, the parallel coverings 15a and 15b are wound when or after the parallel coverings 15a and 15b are wound around the outer peripheral side of the blade portion 12. The vicinity of both ends is bent to the inner peripheral side, and the outer peripheral side in the vicinity of both ends is covered with high-cured unvulcanized rubber (reinforced rubber 22C after vulcanization).
隣り合う芯金４，４の翼部１２，１２の間には、加硫成形時に未加硫ゴムの流動による並列被覆体１５ａ，１５ｂの移動（位置の乱れ）を防ぐため、未加硫ゴム（補積ゴム）２５Ｃが配される。
補積ゴム２５Ｃは、ゴムクローラ１Ｃにおいて主に芯金４よりも内周側のクローラ本体２となるベースゴム２３、および主に芯金４よりも外周側のクローラ本体２、ラグ３となるトレッドゴム２４と同じものである。
In order to prevent movement of the parallel coverings 15a and 15b (disturbance of position) due to the flow of the unvulcanized rubber during the vulcanization molding, the unvulcanized rubber is provided between the wings 12 and 12 of the adjacent core bars 4 and 4. (Complement rubber) 25C is arranged.
In the rubber crawler 1 </ b> C, the supplementary rubber 25 </ b> C is mainly a base rubber 23 that becomes the crawler body 2 on the inner peripheral side of the core metal 4, and a tread that mainly becomes the crawler main body 2 and the lug 3 on the outer peripheral side of the core metal 4. It is the same as the rubber 24.
また、ゴムクローラ１Ｃの加硫成形では、芯金４の翼部１２および補積ゴム２５Ｃの外周がキャンバス（帆布）２６Ｃで覆われ、キャンバス２６Ｃの外周側に並列被覆体１５ａ，１５ｂが巻き回される。キャンバス２６Ｃは、並列被覆体１５ａ，１５ｂが芯金４の翼部１２に接するのを防止する役割をする。キャンバス２６Ｃは、ナイロン等の他の種類の繊維による織物、ポリイミド樹脂シート等の樹脂シートまたは樹脂シートが編まれたもの
（編み物）等（「織物またはシート」）で代用することができる。
Further, in the vulcanization molding of the rubber crawler 1C, the outer periphery of the wing portion 12 of the core metal 4 and the complement rubber 25C is covered with a canvas (canvas) 26C, and the parallel coverings 15a and 15b are wound around the outer periphery of the canvas 26C. Is done. The canvas 26 </ b> C serves to prevent the parallel covering bodies 15 a and 15 b from coming into contact with the wing part 12 of the core metal 4. The canvas 26 </ b> C can be substituted with a fabric made of other types of fibers such as nylon, a resin sheet such as a polyimide resin sheet, or a knitted fabric (knitted fabric) or the like (“woven fabric or sheet”).
加硫成形されたゴムクローラ１Ｃは、スチールコード１３，１３の端近傍の外周側が高い硬度の補強ゴム２２Ｃ，２２Ｃで覆われる。ゴムクローラ１Ｃでは、製造時に１つ目の並列被覆体１５ａの終端１７ａ（のスチールコード１３）および二つ目の並列被覆体１５ｂの始端１６ｂ（のスチールコード１３）をハンダ付け等により固着、またはこれらを隣のスチールコード１３に固着しなくても、始端１６ａ，１６ｂ、終端１７ａ，１７ｂを含むこれらの近傍は、硬度の高い補強ゴム２２Ｃ，２２Ｃによってその外周側への跳ね上がりが防止される。 In the vulcanized rubber crawler 1C, the outer peripheral side in the vicinity of the ends of the steel cords 13 and 13 is covered with reinforcing rubbers 22C and 22C having high hardness. In the rubber crawler 1C, at the time of manufacture, the end 17a (the steel cord 13) of the first parallel covering 15a and the start end 16b (the steel cord 13) of the second parallel covering 15b are fixed by soldering or the like, or Even if these are not fixed to the adjacent steel cord 13, the vicinity of these including the start ends 16a and 16b and the end points 17a and 17b is prevented from jumping to the outer peripheral side by the hard rubbers 22C and 22C.
さらに、ゴムクローラ１Ｃは、スチールコード１３，１３の両端近傍が内周側に折り曲げられていることにより、両端近傍とクローラ本体２の外周側表面との距離が大きくなり、外周側表面への飛び出しのおそれが減少する。
並列被覆体１５ａ，１５ｂそれぞれの始端１６ａ，１６ｂおよび終端１７ａ，１７ｂ近傍の形態、つまりこれらの近傍が内周側に折り曲げられたこと、およびこれらの外周側に他の部分よりも硬度の高い補強ゴム２２Ｃが配されたことは、一つの並列被覆体１５がスパイラル状に巻き回されたゴムクローラに適用することができる。適用されたゴムクローラは、ゴムクローラ１Ｃと同様に、スチールコードの巻き始め部分、および巻き終わり部分の外周側表面への飛び出しが防止される。
Further, in the rubber crawler 1C, because the vicinity of both ends of the steel cords 13 and 13 is bent toward the inner peripheral side, the distance between the vicinity of both ends and the outer peripheral surface of the crawler body 2 increases, and the rubber crawler 1C jumps out to the outer peripheral surface. Reduces the risk of
Forms in the vicinity of the start ends 16a, 16b and end ends 17a, 17b of the parallel coverings 15a, 15b, that is, the vicinity thereof is bent to the inner peripheral side, and the outer peripheral side has higher hardness than the other parts. The arrangement of the rubber 22C can be applied to a rubber crawler in which one parallel covering 15 is wound in a spiral shape. As with the rubber crawler 1C, the applied rubber crawler is prevented from jumping out to the outer peripheral side surface of the winding start portion and the winding end portion of the steel cord.
図８は他のゴムクローラの加硫成形前の翼部１２における周方向断面図である。
加硫成形前の状態が図８に示されるゴムクローラは、加硫成形後におけるクローラ本体、ラグおよび芯金４が、ゴムクローラ１，１Ｂ，１Ｃにおけるものと同じである。このゴムクローラに使用される並列被覆体１５ａ，１５ｂ、および加硫成形工程における並列被覆体１５ａ，１５ｂの巻き回し、それぞれの始端１６ａ，１６ｂおよび終端１７ａ，１７ｂ近傍の曲げ等の処理は、ゴムクローラ１Ｃにおける処理と同じである。
FIG. 8 is a circumferential cross-sectional view of the wing 12 before vulcanization molding of another rubber crawler.
The rubber crawler in which the state before vulcanization molding is shown in FIG. 8 is the same as that of the rubber crawler 1, 1B, 1C in the crawler main body, lug and core metal 4 after vulcanization molding. The parallel coverings 15a and 15b used in the rubber crawler and the winding of the parallel coverings 15a and 15b in the vulcanization molding process, and the processes such as bending in the vicinity of the start ends 16a and 16b and the end ends 17a and 17b, This is the same as the processing in the crawler 1C.
以下の説明において、ゴムクローラ１Ｃと同じ構成のものについてはゴムクローラ１Ｃにおけると同じ名称および符号を付しその説明を省略する。
ゴムクローラの加硫成形工程では、並列被覆体１５ａ，１５ｂそれぞれの始端１６ａ，１６ｂおよび終端１７ａ，１７ｂは、厚さ方向からみたとき、隣り合う芯金４，４の翼部１２，１２の間に配される。補強ゴム２２Ｃ，２２Ｃは、始端１６ａ、終端１７ａと始端１６ｂとが対向する部分、および終端１７ｂの三カ所それぞれの近傍の外周側を覆う。そして、隣り合う芯金４，４の翼部１２，１２の間には、未加硫の補積ゴム２５Ｃが入れられる。つまり、始端１６ａ、終端１７ａと始端１６ｂとが対向する部分、および終端１７ｂそれぞれの近傍は、補強ゴム２２Ｃおよび補積ゴム２５Ｃで挟まれた状態で加硫成形が行われ、ゴムクローラが製造される。
In the following description, the same components as those of the rubber crawler 1C are given the same names and reference numerals as those of the rubber crawler 1C, and the description thereof is omitted.
In the rubber crawler vulcanization molding process, the start ends 16a and 16b and the end ends 17a and 17b of the parallel coverings 15a and 15b are located between the wing portions 12 and 12 of the adjacent core bars 4 and 4 when viewed from the thickness direction. Arranged. The reinforcing rubbers 22C and 22C cover the outer peripheral side in the vicinity of the start end 16a, the portion where the end 17a and the start end 16b are opposed, and the three ends of the end 17b. Then, unvulcanized filler rubber 25 </ b> C is placed between the wing parts 12, 12 of the adjacent core bars 4, 4. That is, the start end 16a, the portion where the end 17a and the start end 16b face each other, and the vicinity of each end 17b are vulcanized and molded between the reinforcing rubber 22C and the accumulated rubber 25C, and a rubber crawler is manufactured. The
ゴムクローラの加硫成形工程では、ゴムクローラ１Ｃの加硫成形と同様に、翼部１２，１２間の補積ゴム２５Ｃの存在によりベースゴム２３（およびトレッドゴム２４）の流動による並列被覆体１５ａ，１５ｂの位置変化が防止され、加硫成形後にも始端１６ａ，１６ｂおよび終端１７ａ，１７ｂは、その外周側が補強ゴム２２Ｃ，２２Ｃで覆われる。
このようにして加硫成形されたゴムクローラは、スチールコード１３，１３の端近傍の外周側に存在する硬度の高い補強ゴム２２Ｃ，２２Ｃにより、離れて継ぎ足されたスチールコード１３，１３の端同士が互いにハンダ付け等されなくても、および巻き始めの端、巻き終わりの端が幅方向隣のスチールコード１３にハンダ付け等されなくとも、外周側への跳ね上がりが防止される。
In the rubber crawler vulcanization molding process, as in the rubber crawler 1C vulcanization molding, the parallel covering 15a due to the flow of the base rubber 23 (and the tread rubber 24) due to the presence of the accumulated rubber 25C between the wing parts 12 and 12 is provided. 15b is prevented from changing, and the outer ends of the start ends 16a and 16b and the end ends 17a and 17b are covered with the reinforcing rubbers 22C and 22C even after vulcanization molding.
The rubber crawler vulcanized and molded in this way has the ends of the steel cords 13 and 13 spliced apart by the high-strength reinforcing rubbers 22C and 22C existing on the outer peripheral side in the vicinity of the ends of the steel cords 13 and 13. Even if they are not soldered to each other, and even if the winding start end and winding end are not soldered to the steel cord 13 adjacent to the width direction, jumping to the outer peripheral side is prevented.
このゴムクローラにおいて、補強ゴム２２Ｃ，２２Ｃに換えて、ゴムクローラ１，１Ｂに使用された補強繊維２１，２１Ｂａ，２１Ｂｂ，２１Ｂｃを使用してもよく、その場合にも、硬度の高い補強ゴム２２Ｃ，２２Ｃを使用したときと同様の効果（ハンダ付け等を行うことなく跳ね上がり防止）を得る。
図９は他のゴムクローラ１Ｄに巻き回された並列被覆体１５の様子を示す図、図１０は図９におけるＤ−Ｄ矢視図である。
In this rubber crawler, the reinforcing fibers 21, 21Ba, 21Bb, 21Bc used in the rubber crawlers 1 and 1B may be used instead of the reinforcing rubbers 22C and 22C. , 22C, the same effect (prevents jumping without performing soldering or the like) is obtained.
FIG. 9 is a view showing a state of the parallel covering body 15 wound around another rubber crawler 1D, and FIG. 10 is a view taken along the line DD in FIG.
ゴムクローラ１Ｄを構成するクローラ本体２、ラグ３および芯金４は、ゴムクローラ１，１Ｂ，１Ｃにおけるものと同じである。
ゴムクローラ１Ｄに埋め込まれた抗張体５は、翼部１２の外周側への巻き回しの途中でスチールコード１３が途切れた、ゴムクローラ１Ｂにおけるものと同じである。ゴムクローラ１Ｄにおいてゴムクローラ１，１Ｂ，１Ｃにおけるものと同じ構成の部分は、図９，１０においてゴムクローラ１，１Ｂ，１Ｃにおけるものと同じ符合を付し、その説明を省略する。
The crawler main body 2, the lug 3 and the cored bar 4 constituting the rubber crawler 1D are the same as those in the rubber crawlers 1, 1B and 1C.
The tensile body 5 embedded in the rubber crawler 1D is the same as that in the rubber crawler 1B in which the steel cord 13 is cut off during the winding of the wing portion 12 to the outer peripheral side. In the rubber crawler 1D, the same components as those in the rubber crawlers 1, 1B, 1C are denoted by the same reference numerals as those in the rubber crawlers 1, 1B, 1C in FIG.
ゴムクローラ１Ｂについての図３，４と図９，１０とを比較して、ゴムクローラ１Ｄは、加硫成形工程において、始端１６ａ，１６ｂおよび終端１７ａ，１７ｂの外周側を覆う補強繊維２１Ｄａ，２１Ｄｂ，２１Ｄｃの周方向における範囲が異なる。ゴムクローラ１Ｂでは、加硫成形工程における補強繊維２１Ｂａ，２１Ｂｂ，２１Ｂｃによる始端１６ａ，１６ｂ、終端１７ａ，１７ｂを覆う範囲が、始端１６ａ，１６ｂ等が（厚さ方向に）重なる芯金４の翼部１２にとどまっていた。 Comparing FIGS. 3 and 4 and FIGS. 9 and 10 for the rubber crawler 1B, the rubber crawler 1D is provided with reinforcing fibers 21Da and 21Db that cover the outer peripheral sides of the start ends 16a and 16b and the end ends 17a and 17b in the vulcanization molding process. , 21Dc are different in the circumferential direction. In the rubber crawler 1B, the range covering the start ends 16a, 16b and the end ends 17a, 17b by the reinforcing fibers 21Ba, 21Bb, 21Bc in the vulcanization molding process is such that the start ends 16a, 16b and the like overlap (in the thickness direction). I stayed in part 12.
これに対して、ゴムクローラ１Ｄの加硫成形工程では、補強繊維２１Ｄａ，２１Ｄｂ，２１Ｄｃが覆う範囲は、始端１６ａ，１６ｂ等が（厚さ方向に）重なる芯金４に加えて、これと周方向両側で隣り合う芯金４，４の翼部１２，１２にまで及ぶ。補強繊維２１Ｄａ，２１Ｄｂ，２１Ｄｃは、始端１６ａ，１６ｂ等が重なる翼部１２から両隣の芯金４，４の翼部１２に架け渡される。補強繊維２１Ｄａ，２１Ｄｂ，２１Ｄｃは、少なくとも、並列被覆体１５ａ，１５ｂにおける始端１６ａ，１６ｂ、終端１７ａ，１７ｂを有する当該巻き部分、および始端１６ａ，１６ｂについては一周後の隣り合う並列被覆体の部分、終端１７ａ，１７ｂについては一周前の隣り合う並列被覆体の部分を覆う。 On the other hand, in the vulcanization molding process of the rubber crawler 1D, the range covered by the reinforcing fibers 21Da, 21Db, and 21Dc is in addition to the core metal 4 in which the start ends 16a, 16b and the like overlap (in the thickness direction), It extends to the wings 12 and 12 of the cored bars 4 and 4 adjacent on both sides in the direction. The reinforcing fibers 21Da, 21Db, and 21Dc are bridged from the wing portion 12 where the start ends 16a and 16b and the like overlap to the wing portions 12 of the adjacent core bars 4 and 4. Reinforcing fibers 21Da, 21Db, and 21Dc are at least winding portions having start ends 16a and 16b and end portions 17a and 17b in parallel covering bodies 15a and 15b, and portions of adjacent parallel covering bodies after one turn with respect to start ends 16a and 16b. The ends 17a and 17b cover the adjacent parallel covering portions one cycle before.
ゴムクローラ１Ｄの加硫成形工程では、ゴムクローラ１Ｃの加硫成形工程と同様に、隣り合う芯金４，４の翼部１２，１２間が、補積ゴム２５Ｃで満たされる。
ゴムクローラ１Ｄは、加硫成形前にこのように補強繊維２１Ｄａ，２１Ｄｂ，２１Ｄｃが配されることにより、加硫成形処理において未加硫ゴムが、ラグ等に吸い上げられる等の流動により始端１６ａ，１６ｂ、終端１７ａ，１７ｂが隣り合う翼部１２，１２の間に移動しても、始端１６ａ，１６ｂ、終端１７ａ，１７ｂの外周側に必ず補強繊維２１Ｄａ，２１Ｄｂ，２１Ｄｃが存在する。 ゴムクローラ１Ｄは、離れて継ぎ足されたスチールコード１３，１３の端同士が互いにハンダ付け等されなくても、および巻き始めの端、巻き終わりの端が幅方向隣のスチールコード１３にハンダ付け等されなくとも、スチールコード１３，１３の端近傍の外周側への跳ね上がりが防止される。
In the vulcanization molding process of the rubber crawler 1D, the space between the wings 12 and 12 of the adjacent metal cores 4 and 4 is filled with the supplementary rubber 25C as in the vulcanization molding process of the rubber crawler 1C.
In the rubber crawler 1D, the reinforcing fibers 21Da, 21Db, and 21Dc are arranged in this manner before vulcanization molding, so that the uncured rubber is sucked up by a lug or the like in the vulcanization molding process, and the starting end 16a, Even if 16b and the terminal ends 17a and 17b move between the adjacent wing parts 12 and 12, the reinforcing fibers 21Da, 21Db and 21Dc always exist on the outer peripheral side of the starting ends 16a and 16b and the terminal ends 17a and 17b. In the rubber crawler 1D, even if the ends of the steel cords 13 and 13 that are joined apart from each other are not soldered to each other, and the end of winding and the end of winding are soldered to the steel cord 13 adjacent in the width direction, etc. Even if it is not done, the steel cords 13 and 13 are prevented from jumping to the outer periphery near the ends.
ゴムクローラ１Ｄの加硫成形工程において、始端１６ａ，１６ｂ、終端１７ａ，１７ｂの近傍を内周側に折り曲げると、外周側への跳ね上がり防止効果が増大する。さらに始端１６ａ，１６ｂ、終端１７ａ，１７ｂの外周側に、ゴムクローラ１Ｃに使用された補強ゴム２２Ｃを配することにより、一層の跳ね上がり防止効果が期待できる。
図１１は他のゴムクローラ１Ｅに巻き回された並列被覆体１５の様子を示す図、図１２は図１１におけるＥ−Ｅ矢視図である。
In the vulcanization molding process of the rubber crawler 1D, if the vicinity of the start ends 16a and 16b and the end points 17a and 17b is bent to the inner peripheral side, the effect of preventing the jump to the outer peripheral side is increased. Further, by arranging the reinforcing rubber 22C used for the rubber crawler 1C on the outer peripheral sides of the start ends 16a and 16b and the end ends 17a and 17b, a further effect of preventing the jumping up can be expected.
FIG. 11 is a view showing a state of the parallel covering 15 wound around another rubber crawler 1E, and FIG. 12 is a view taken along the line EE in FIG.
ゴムクローラ１Ｅを構成するクローラ本体２、ラグ３および芯金４は、ゴムクローラ１，１Ｂ，１Ｃにおけるものと同じである。
ゴムクローラ１Ｅに埋め込まれた抗張体５は、ゴムクローラ１におけるものと同じである。ゴムクローラ１Ｅにおいてゴムクローラ１，１Ｂ，１Ｃにおけるものと同じ構成の部分は、図１１，１２においてゴムクローラ１，１Ｂ，１Ｃにおけるものと同じ符合を付し、その説明を省略する。
The crawler main body 2, the lug 3 and the cored bar 4 constituting the rubber crawler 1E are the same as those in the rubber crawlers 1, 1B and 1C.
The tensile body 5 embedded in the rubber crawler 1E is the same as that in the rubber crawler 1. In the rubber crawler 1E, the same components as those in the rubber crawlers 1, 1B, and 1C are denoted by the same reference numerals as those in the rubber crawlers 1, 1B, and 1C in FIGS.
ゴムクローラ１Ｅは、並列被覆体１５の始端１６近傍および終端１７近傍が、補強繊維２１Ｅａ，２１Ｅｂによって、ゴムクローラ１，１Ｂに比べて強固に被覆される。
すなわち、矩形の補強繊維２１Ｅａが、並列被覆体１５の始端１６を含む巻き始め部分に外周側で二重になるように巻かれ、かつ巻かれた二重の外周側の先の余った部分３１Ｅが、並列被覆体１５の二周目の巻き回しで並列被覆体１５の内周側になるように組み入れられる。
In the rubber crawler 1E, the vicinity of the start end 16 and the vicinity of the end end 17 of the parallel covering 15 is more strongly covered with the reinforcing fibers 21Ea and 21Eb than the rubber crawlers 1 and 1B.
That is, the rectangular reinforcing fiber 21Ea is wound around the winding start portion including the starting end 16 of the parallel covering 15 so as to be doubled on the outer peripheral side, and the remaining portion 31E on the double outer peripheral side is wound. However, it is integrated so that it may become the inner peripheral side of the parallel coating | cover 15 with the 2nd winding of the parallel coating | cover 15.
この後、並列被覆体１５は、ゴムクローラ１の場合と同様に芯金４の翼部１２の外周側にらせん状に巻き回される。
並列被覆体１５の巻き回しが終わると、並列被覆体１５の終端１７を含むその近傍に、
矩形の補強繊維２１Ｅｂが、外周側が二重となるように、補強繊維２１Ｅａとは逆方向で巻かれる。補強繊維２１Ｅｂは、終端１７を巻いてなお余った部分３２Ｅが、隣の並列被覆体１５の内周側に押し入れられる。
Thereafter, the parallel covering 15 is spirally wound around the outer peripheral side of the wing portion 12 of the core metal 4 as in the case of the rubber crawler 1.
When the winding of the parallel covering 15 is finished, in the vicinity including the end 17 of the parallel covering 15,
The rectangular reinforcing fiber 21Eb is wound in the opposite direction to the reinforcing fiber 21Ea so that the outer peripheral side is doubled. In the reinforcing fiber 21Eb, the remaining portion 32E wound around the terminal end 17 is pushed into the inner peripheral side of the adjacent parallel covering 15.
つまり、始端１６を覆う補強繊維２１Ｅａはその矩形の一辺側（の部分３１Ｅ）が始端１６の隣の並列被覆体１５と翼部１２との間に、終端１７を覆う補強繊維２１Ｅｂはその矩形の一辺側（の部分３２Ｅ）が終端１７の隣の並列被覆体１５と翼部１２との間に、見かけ上挟まれた形態となる。そして、補強繊維２１Ｅａ，２１Ｅｂは、この状態で加硫成形されてゴムクローラ１Ｅ内に埋め込まれる。 That is, the reinforcing fiber 21Ea covering the starting end 16 has a rectangular one side (part 31E) between the parallel covering 15 adjacent to the starting end 16 and the wing 12 and the reinforcing fiber 21Eb covering the terminal end 17 is rectangular. One side (part 32E) is apparently sandwiched between the parallel covering 15 adjacent to the terminal end 17 and the wing 12. The reinforcing fibers 21Ea and 21Eb are vulcanized and molded in the rubber crawler 1E in this state.
ゴムクローラ１Ｅは、スパイラル状に巻き回されたスチールコード１３，１３の両端にそれぞれ補強繊維２１Ｅａ，２１Ｅｂが巻かれ、補強繊維２１Ｅａ，２１Ｅｂは外周側で二重になっていることにより、ゴムクローラ１Ｅが始端１６および終端１７が埋め込まれた部分で屈曲したとき、始端１６および終端１７の過剰な動きが補強繊維２１Ｅａ，２１Ｅｂにより抑制される。その結果、スチールコード１３，１３の両端が位置する場所に生じ易いゴムの亀裂発生を、未然に防ぐことができる。 In the rubber crawler 1E, the reinforcing fibers 21Ea and 21Eb are wound around both ends of the steel cords 13 and 13 wound in a spiral shape, and the reinforcing fibers 21Ea and 21Eb are doubled on the outer peripheral side, so that the rubber crawler When 1E is bent at the portion where the start end 16 and the end end 17 are embedded, excessive movement of the start end 16 and the end end 17 is suppressed by the reinforcing fibers 21Ea and 21Eb. As a result, it is possible to prevent the occurrence of cracks in the rubber that are likely to occur at the locations where both ends of the steel cords 13 and 13 are located.
このように、補強繊維２１Ｅａ，２１Ｅｂは、ゴムクローラ１Ｅの製造過程において始端１６および終端１７のハンダ付け等の固着作業を省き、かつ耐久性の高いゴムクローラ１Ｅを実現することができる。
補強繊維２１Ｅａ，２１Ｅｂにおける、並列被覆体１５の他の部分と翼部１２との間に見かけ上挟まれる部分３１Ｅ，３２Ｅは、隣り合う並列被覆体１５のさらに隣り合う並列被覆体１５まで拡大してもよい。並列被覆体１５の他の部分と翼部１２との間に見かけ上挟まれる部分３１Ｅ，３２Ｅの範囲は、任意に決定することができる。
As described above, the reinforcing fibers 21Ea and 21Eb can eliminate the fixing work such as soldering of the start end 16 and the end end 17 in the manufacturing process of the rubber crawler 1E, and can realize a highly durable rubber crawler 1E.
In the reinforcing fibers 21Ea and 21Eb, the portions 31E and 32E that are apparently sandwiched between the other portions of the parallel covering 15 and the wings 12 expand further to the adjacent parallel covering 15 of the adjacent parallel covering 15. May be. The range of the parts 31E and 32E that are apparently sandwiched between the other part of the parallel covering 15 and the wing part 12 can be arbitrarily determined.
また、ゴムクローラ１におけるように、並列被覆体１５の始端１６および終端１７近傍を１つの補強繊維でそれぞれ二重に巻いてもよい。
上述の実施形態において、いずれの補強繊維２１，２１Ｂａ，２１Ｂｂ，２１Ｂｃ，２１Ｅａ，２１Ｅｂも、厚さ方向から見たときに、並列被覆体１５の始端１６，１６ａ，１６ｂおよび終端１７，１７ａ，１７ｂを完全に覆い、なおこれらの端面が向く先に拡がる大きさが好ましい。
Further, as in the rubber crawler 1, the vicinity of the start end 16 and the end end 17 of the parallel covering 15 may be double wound with one reinforcing fiber.
In the above-described embodiment, any of the reinforcing fibers 21, 21 Ba, 21 Bb, 21 Bc, 21 Ea, 21 Eb is the start end 16, 16 a, 16 b and the end end 17, 17 a, 17 b of the parallel covering 15 when viewed from the thickness direction. It is preferable to have a size that completely covers the surface and expands to the end facing these end faces.
ゴムクローラ製造における加硫成形工程において、２本のスチールコード１３がゴムで被覆された並列被覆体１５，１５ａ，１５ｂに換えて、１本のスチールコード１３がゴムに被覆されたもの、３本以上のスチールコード１３による並列体がゴムで被覆された並列被覆体を使用してもよい。並列被覆体は２〜５本による並列体がゴムで被覆されたものの使用が好ましい。 In the vulcanization molding process in the production of rubber crawlers, instead of the parallel coverings 15, 15a, 15b in which two steel cords 13 are covered with rubber, one steel cord 13 is covered with rubber, three You may use the parallel covering body by which the parallel body by the above steel cord 13 was coat | covered with rubber | gum. It is preferable to use a parallel covering body in which two to five parallel covering bodies are covered with rubber.
上述したゴムクローラ１，１Ｂ，１Ｃ，１Ｄ，１Ｅの加硫成形工程では、スチールコード１３が予めゴム１４で被覆された並列被覆体１５，１５ａ，１５ｂが使用されたが、ゴム１４で被覆されないスチールコードを芯金４の翼部１２に巻き回す場合であっても、上述した形態を採用することができ、上記したと同様の効果を得ることができる。
その他、ゴムクローラ１，１Ｂ，１Ｃ，１Ｄ，１Ｅおよびゴムクローラ１，１Ｂ，１Ｃ，１Ｄ，１Ｅの各構成または全体の構造、形状、寸法、個数、材質などは、本発明の趣旨に沿って適宜変更することができる。
In the vulcanization molding process of the rubber crawlers 1, 1 </ b> B, 1 </ b> C, 1 </ b> D, and 1 </ b> E described above, the parallel covering bodies 15, 15 a and 15 b in which the steel cord 13 is previously coated with the rubber 14 are used. Even when the steel cord is wound around the wing portion 12 of the cored bar 4, the above-described form can be adopted, and the same effect as described above can be obtained.
In addition, each structure of rubber crawlers 1, 1B, 1C, 1D, 1E and rubber crawlers 1, 1B, 1C, 1D, 1E, or the overall structure, shape, dimensions, number, material, and the like are in accordance with the spirit of the present invention. It can be changed as appropriate.
本発明は、コンバイン、トラクタ等の農業機械、バックホー等の建設機械のクローラ式走行装置に装着されるゴムクローラに利用することができる。 INDUSTRIAL APPLICABILITY The present invention can be used for a rubber crawler mounted on a crawler type traveling device of an agricultural machine such as a combine or tractor, or a construction machine such as a backhoe.
１，１Ｂ，１Ｃ，１Ｄ，１Ｅ ゴムクローラ
４ 芯金
１２ 翼部
１３ スチールコード
１６，１６ａ，１６ｂ 巻き始めの端、始端（両端の一方）
１７，１７ａ，１７ｂ 巻き終わりの端、終端（両端の他方）
２１，２１Ｂａ，２１Ｂｂ，２１Ｂｃ，２１Ｄａ，２１Ｄｂ，２１Ｄｃ，２１Ｅａ，２１
Ｅｂ 補強繊維（織物、編み物またはシート）
２２Ｃ 補強ゴム（硬度の高いゴム）
1, 1B, 1C, 1D, 1E Rubber crawler 4 Core metal 12 Wing 13 Steel cord 16, 16a, 16b Winding start end, start end (one of both ends)
17, 17a, 17b End of winding end, end (the other of both ends)
21, 21Ba, 21Bb, 21Bc, 21Da, 21Db, 21Dc, 21Ea, 21
Eb Reinforcing fiber (woven fabric, knitted fabric or sheet)
22C Reinforced rubber (high hardness rubber)
Claims (4)
幅方向から見たときに、
巻き回された前記スチールコードの両端がいずれも前記翼部の外周側に位置し、
前記スチールコードの両端の外周側のいずれにも前記両端を覆うように織物、編み物もしくはシートが埋め込まれた、または前記スチールコードの両端の外周側のゴムの硬度が他の部分のゴムの硬度に比べて高い
ことを特徴とするゴムクローラ。 A rubber crawler provided with a steel cord wound in a spiral shape on the outer peripheral side of the wing portion of the core metal,
When viewed from the width direction,
Both ends of the wound steel cord are located on the outer peripheral side of the wing part,
A woven fabric, a knitted fabric or a sheet is embedded so as to cover the both ends on both outer peripheral sides of the steel cord, or the hardness of the rubber on the outer peripheral side of the both ends of the steel cord is equal to the hardness of the rubber of other portions. A rubber crawler characterized by a higher price.
前記スチールコードの両端近傍における前記翼部の外周側に位置する部分が前記スチールコードの他の部分に比べて前記翼部に近づけられた
請求項１に記載のゴムクローラ。 When viewed from the width direction,
The rubber crawler according to claim 1, wherein a portion located on an outer peripheral side of the wing portion in the vicinity of both ends of the steel cord is closer to the wing portion than other portions of the steel cord.
その加硫成形前において、スパイラル状に巻き回された前記スチールコードの両端をいずれも前記翼部の外周側に位置させ、
前記スチールコードの両端およびその近傍の外周側に前記両端を覆うように織物、編み物もしくはシートを配し、または前記スチールコードの両端およびその近傍の外周側に前記両端を覆うように他の部分の未加硫ゴムよりも硬度の高い未加硫ゴムを配し、
その後に加硫成形を行う
ことを特徴とするゴムクローラの製造方法。 A method of manufacturing a rubber crawler comprising a steel cord wound in a spiral shape on the outer peripheral side of a wing portion of a core metal,
Before the vulcanization molding, both ends of the steel cord wound in a spiral shape are positioned on the outer peripheral side of the wing part,
A woven fabric, a knitted fabric or a sheet is arranged so as to cover both ends of the steel cord and the vicinity thereof, or other parts of the steel cord are covered so as to cover both ends of the steel cord and the vicinity thereof. Arrange uncured rubber that is harder than unvulcanized rubber,
A method for producing a rubber crawler, comprising performing vulcanization molding thereafter.
前記スチールコードの両端近傍における前記翼部の外周側に位置する部分を前記スチールコードの他の部分に比べて前記翼部に近づけ、
その後に加硫成形を行う
請求項３に記載のゴムクローラの製造方法。 Before vulcanization molding,
The portion located on the outer peripheral side of the wing portion in the vicinity of both ends of the steel cord is closer to the wing portion than other portions of the steel cord,
The rubber crawler manufacturing method according to claim 3, wherein vulcanization molding is performed thereafter.
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| JP2020045044A (en) * | 2018-09-21 | 2020-03-26 | 住友ゴム工業株式会社 | Elastic crawler |
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|---|---|---|---|---|
| JP2001114144A (en) * | 1999-10-21 | 2001-04-24 | Ohtsu Tire & Rubber Co Ltd :The | Elastic crawler and its manufacturing method |
| JP2009029205A (en) * | 2007-07-25 | 2009-02-12 | Sumitomo Rubber Ind Ltd | Elastic crawler, and manufacturing method for elastic crawler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001114144A (en) * | 1999-10-21 | 2001-04-24 | Ohtsu Tire & Rubber Co Ltd :The | Elastic crawler and its manufacturing method |
| JP2009029205A (en) * | 2007-07-25 | 2009-02-12 | Sumitomo Rubber Ind Ltd | Elastic crawler, and manufacturing method for elastic crawler |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020045044A (en) * | 2018-09-21 | 2020-03-26 | 住友ゴム工業株式会社 | Elastic crawler |
| KR20200034591A (en) * | 2018-09-21 | 2020-03-31 | 스미토모 고무 코교 카부시키카이샤 | Elastic crawler |
| CN110937039A (en) * | 2018-09-21 | 2020-03-31 | 住友橡胶工业株式会社 | Elastic crawler belt |
| JP7155797B2 (en) | 2018-09-21 | 2022-10-19 | 住友ゴム工業株式会社 | elastic crawler |
| KR102552475B1 (en) * | 2018-09-21 | 2023-07-05 | 스미토모 고무 코교 카부시키카이샤 | Elastic crawler |
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