JPH06305460A - Structure and manufacture of rubber crawler - Google Patents
Structure and manufacture of rubber crawlerInfo
- Publication number
- JPH06305460A JPH06305460A JP12063893A JP12063893A JPH06305460A JP H06305460 A JPH06305460 A JP H06305460A JP 12063893 A JP12063893 A JP 12063893A JP 12063893 A JP12063893 A JP 12063893A JP H06305460 A JPH06305460 A JP H06305460A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- rubber crawler
- corner
- crawler
- peripheral side
- 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.)
- Granted
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はゴムクロ−ラの構造及び
その製法に関し、特に言えば、芯金が埋設されていない
タイプのゴムクロ−ラの構造及びその製法に係るもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a rubber crawler and a manufacturing method thereof, and more particularly to a structure of a rubber crawler of a type in which a core bar is not buried and a manufacturing method thereof.
【０００２】[0002]
【従来の技術】近年、ゴムクロ−ラは、農業機械をはじ
めとして建設機械や土木作業機械に広く使用されてい
る。ゴムクロ−ラの構造については２通りあり、ゴムク
ロ−ラの内周面側に突出する角部をスプロケットの係合
部として推進力を伝えるゴムクロ−ラがある。このタイ
プのゴムクロ−ラの角部はゴム部よりなっており、通常
は芯金がゴム中に埋設することがないので、ゴムクロ−
ラの軽量化が図れるといわれている。2. Description of the Related Art In recent years, rubber crawlers have been widely used in construction machines and civil engineering machines as well as agricultural machines. There are two types of rubber crawler structures, and there is a rubber crawler that transmits a propulsive force by using the corners protruding toward the inner peripheral surface of the rubber crawler as engaging parts of the sprocket. Since the corners of this type of rubber crawlers are made of rubber, the core bar is usually not buried in the rubber, so
It is said that the LA can be made lighter.
【０００３】[0003]
【発明が解決しようとする課題】しかるに、このゴムク
ロ−ラの角部の剛性を確保するために、ゴムボリュ−ム
を多くしているのが通例である。このため、ゴムクロ−
ラの製造の際には、ゴムの熱伝導率が低いことと熱伝導
率の高い芯金が埋設されてないこともあり、通常の芯金
入りゴムクロ−ラより加硫成形時間が長いという欠点が
あった。本発明は、かかる従来の技術の問題点に鑑みて
なされたものであって、加硫成形時の成形時間の短縮を
ねらったものである。However, it is customary to increase the number of rubber volumes in order to ensure the rigidity of the corners of the rubber crawlers. Therefore, the rubber
In the production of rubber, the rubber has a low thermal conductivity and the core bar with a high thermal conductivity is not embedded, so that the vulcanization molding time is longer than that of a normal rubber cradle with core bar. was there. The present invention has been made in view of the problems of the conventional techniques, and aims at shortening the molding time at the time of vulcanization molding.
【０００４】[0004]
【課題を解決するための手段】本発明の第１におけるゴ
ムクロ−ラの構造は、無端状ゴム弾性体中にその長手方
向に向って抗張体が埋設され、その内周面側にスプロケ
ットとの係合部となるゴム製角部と、外周面側にゴムラ
グとが形成されたゴムクロ−ラにあって、角部に対向し
て窪みを形成したことを特徴とするものであって、好ま
しくは、この窪みがゴムクロ−ラの外周側より構成さ
れ、この窪みが抗張体の埋設部位より内側に達してお
り、場合によっては、この窪みがゴムクロ−ラの内周面
より角部内にまで達しているゴムクロ−ラの構造であ
る。そして、窪みが角部を貫通している場合もあり、或
いはゴムクロ−ラの内周側より形成されたものもある。The structure of the rubber crawler according to the first aspect of the present invention is such that a tensile member is embedded in an endless rubber elastic body in the longitudinal direction thereof, and a sprocket is provided on the inner peripheral surface side thereof. In a rubber crawler in which a rubber corner portion to be an engaging portion of and a rubber lug is formed on the outer peripheral surface side, a recess is formed facing the corner portion, which is preferable. Is formed from the outer peripheral side of the rubber crawler, the inner part reaches the inside of the embedding part of the tensile body, and in some cases, this dimple extends from the inner peripheral surface of the rubber crawler to the inside of the corner. It is the structure of the rubber crawler that has reached. In some cases, the depressions penetrate the corners, or there are those formed from the inner peripheral side of the rubber crawler.
【０００５】そして、本発明の第２の製法は、上下に開
放するモ−ルドを合せ、両モ−ルドにて形成されたキャ
ビテイ内にゴム材料を充満させて加硫成形してなるゴム
クロ−ラの製法であって、ゴムクロ−ラの内周側に突出
する角部を形成する凹部をモ−ルド面に形成し、これに
対向するモ−ルド面に膨突部を形成し、角部を形成する
両モ−ルド面の間隔をせまくしたことを特徴とするもの
である。In the second manufacturing method of the present invention, rubber molds formed by vulcanizing and molding by combining molds which are opened vertically and filling the cavity formed by both molds with a rubber material. In the method of manufacturing a rubber crawler, a concave portion that forms a corner portion that protrudes toward the inner peripheral side of the rubber crawler is formed on the mold surface, and a bulge portion is formed on the mold surface that faces the concave portion. It is characterized by narrowing the space between the two mold surfaces forming the.
【０００６】[0006]
【作用】本発明のゴムクロ−ラは以上の構造及びその製
法を有するものであり、一口で言えばゴム材料の最も厚
い角部の部位に対し、外周側より窪みを形成してそのゴ
ム材料をできるだけ薄くしたものである。このために
は、ゴムクロ−ラを形成する際のモ−ルドの形状を、か
かる部位に膨突部を備えたものである。The rubber crawler of the present invention has the above-described structure and the manufacturing method thereof. In a word, the rubber material is formed by forming a recess from the outer peripheral side at the thickest corner portion of the rubber material. It is as thin as possible. For this purpose, the shape of the mold when forming the rubber crawler is such that a bulge portion is provided at this portion.
【０００７】従って、熱伝導率のすぐれたモ−ルドがゴ
ムの厚みの大きい角部の外周側に近づくこととなるた
め、加硫成形の際の時間が短かくてすむこととなったも
のである。勿論、ゴムクロ−ラの大きさによって、加硫
成形の条件は異なるが、通常行われている１６０度で６
０分の加硫成形条件であったものが、４０分程度ですむ
こととなり、生産性が高くなることは明らかである。更
にゴムクロ−ラ全体を考えれば、この部位のゴムが省略
されることとなり、材料の軽減による軽量化を図られる
ことともなる。Therefore, since the mold having excellent thermal conductivity comes close to the outer peripheral side of the corner portion where the rubber has a large thickness, the time required for the vulcanization molding can be shortened. is there. Of course, the conditions for vulcanization molding differ depending on the size of the rubber crawler, but it is usually 6 at 160 degrees.
It is clear that the vulcanization molding condition of 0 minutes will require about 40 minutes and the productivity will be high. Further, considering the entire rubber crawler, the rubber in this portion is omitted, and the weight can be reduced by reducing the material.
【０００８】[0008]
【実施例】以下、本発明を実施例をもって更に詳細に説
明する。図１は、本発明の第１におけるゴムクロ−ラの
第１実施例を示す内周面の平面図、図２は、その外周面
の平面図、図３は、その側面図である。又、図４は、図
１におけるＡ−Ａ線での断面図であり、図５は、Ｂ−Ｂ
線での断面図である。図において、１はゴムクロ−ラの
基本をなす無端状のゴム弾性体であり、その内周面側の
中央に一定間隔をもち、弾性体１と同体をなす角部２、
２…が形成されている。又、無端状のゴム弾性体１の外
周側には、これ又弾性体１と同体のゴムラグ３、３…が
形成されている。EXAMPLES The present invention will be described in more detail with reference to examples. 1 is a plan view of an inner peripheral surface showing a first embodiment of a rubber crawler according to the first aspect of the present invention, FIG. 2 is a plan view of an outer peripheral surface thereof, and FIG. 3 is a side view thereof. 4 is a sectional view taken along the line AA in FIG. 1, and FIG. 5 is a sectional view taken along the line BB.
It is sectional drawing in a line. In the figure, reference numeral 1 denotes an endless rubber elastic body that forms the basis of a rubber crawler, and a corner portion 2 that has the same body as the elastic body 1 with a constant interval in the center on the inner peripheral surface side,
2 ... is formed. Further, on the outer peripheral side of the endless rubber elastic body 1, rubber lugs 3, 3, ... Also formed of the elastic body 1 are formed.
【０００９】そして、ゴム弾性体１の長手方向に向かっ
て、抗張体としてのスチ−ルコ−ド列４が一列に並べら
れて埋設されている。前記した角部２は、図示しないス
プロケットとの係合部となり、或いはスプロケットや転
輪との脱輪防止用係合部となるものである。A plurality of steel code rows 4 as a tensile body are arranged and embedded in the rubber elastic body 1 in the longitudinal direction. The above-mentioned corner portion 2 serves as an engaging portion with a sprocket (not shown), or serves as an engaging portion for preventing wheel removal with the sprocket and the rolling wheels.
【００１０】さて、図示するように角部２の部位はゴム
ラグ３の位置にもよるが、ゴムクロ−ラ全体としては最
も厚さの厚い個所である。しかるに、本発明のこの例に
あっては、ゴムクロ−ラの外周側よりこの部位２に向っ
て窪み５を形成したものである。この窪み５は、ゴム材
料の低減となることは勿論であるが、ゴムクロ−ラの加
硫成形時にあって、熱伝導率のよいモ−ルドの部位がこ
こに挿入されることとなり、成形時間の短縮がもたらさ
れるものである。As shown in the figure, the corner portion 2 is the thickest portion of the entire rubber crawler although it depends on the position of the rubber lug 3. However, in this example of the present invention, the recess 5 is formed from the outer peripheral side of the rubber crawler toward this portion 2. Needless to say, this recess 5 reduces the amount of rubber material, but at the time of vulcanization molding of the rubber crawler, a portion of a mold having a good thermal conductivity is inserted here, so that the molding time is shortened. Will be shortened.
【００１１】図にあって、窪み５はスチ−ルコ−ド列４
より内方のゴムクロ−ラの内周面を越えて角部２内に入
り込んだ例であり、このようにすることにより、いずれ
も熱伝導率のよいスチ−ルコ−ド列４と、モ−ルドの膨
突部との存在により、成形時間の短縮が確実になされる
こととなるのである。In the figure, the depression 5 is a steel cord row 4
This is an example in which the inner side of the inner rubber crawler is crossed over and enters the corner portion 2. By doing so, the steel cord row 4 and the mold 4 each having a good thermal conductivity are formed. By virtue of the presence of the bulging portion of the groove, the molding time can be surely shortened.
【００１２】この窪み５の深さは、そのゴムクロ−ラの
形状、使用予定状態等により任意に選択されるが、スチ
−ルコ−ド列４と略同じ位置におかれてもよい。又、場
合によっては、図６の実施例２に示すように窪み５が角
部２をつらぬいた形状であってもよい場合がある。The depth of the recess 5 is arbitrarily selected according to the shape of the rubber crawler, the state of use, etc., but it may be located at substantially the same position as that of the steel code row 4. In some cases, the recess 5 may have a shape in which the corner 2 is cut out as shown in the second embodiment of FIG.
【００１３】図７は、本発明の第１のゴムクロ−ラの別
例を示す断面図であり、この例では成形時に加熱に時間
がかかる部位、即ち角部４にその頂部より窪み５1 を形
成した例である。こうすることにより、成形時にゴム材
料への熱伝導が比較的均一化されるものであり、又、ゴ
ム材料の低減ともなるものである。かかる窪み５1 は、
モ−ルドの角部を形成する凹み内に突出部をもうけるこ
とで簡単にできることとなる。FIG. 7 is a cross-sectional view showing another example of the first rubber crawler of the present invention. In this example, a recess 5 1 is formed in the corner 4 at the portion where heating takes time at the time of molding, that is, in the corner 4. It is an example of forming. By doing so, the heat conduction to the rubber material during molding is relatively uniform, and the rubber material is reduced. The depression 5 1 is
This can be easily done by providing a protrusion in the recess forming the corner of the mold.
【００１４】さて、図８は、ゴムクロ−ラを加硫成形す
る際に用いられるモ−ルドの断面図を示すが、上モ−ル
ド１１にはゴムラグを形成する凹部１２が備えられ、一
方、下モ−ルド１３には角部が形成される凹部１４が備
えられていて、これら上下モ−ルド１１、１３が合せら
れ、ゴムクロ−ラを形成するキャビテイ１５を形取るこ
ととなる。FIG. 8 shows a sectional view of a mold used for vulcanizing and molding a rubber crawler. The upper mold 11 is provided with a recess 12 for forming a rubber lug, while The lower mold 13 is provided with a concave portion 14 having a corner portion, and these upper and lower molds 11 and 13 are combined to form a cavity 15 forming a rubber crawler.
【００１５】しかるに、上モ−ルド１１には、下モ−ル
ド１３の凹部１４に対向して膨突部１６が形成され、こ
れが前記したゴムクロ−ラの窪み５を形成することとな
る。図中、２１はキャビテイ１５内に予め張設されたス
チ−ルコ−ド列であり、この熱伝導率のよいスチ−ルコ
−ド列２１と、これ又熱伝導率のよいモ−ルド１１の膨
突部１６によって、ゴムクロ−ラの加硫成形時の熱に対
する厚みを比較的平均的なものとするものであって、こ
のため、ゴムの加硫成形時間が従来のものより短縮され
ることとなったものである。On the other hand, the upper mold 11 is formed with the bulging portion 16 facing the concave portion 14 of the lower mold 13, and this forms the depression 5 of the rubber crawler. In the figure, reference numeral 21 designates a steel cord row which is stretched in advance in the cavity 15, and includes a steel cord row 21 having a good thermal conductivity and a mold 11 having a good thermal conductivity. The bulging portion 16 makes the thickness of the rubber crawler relatively to heat during vulcanization molding, and therefore the vulcanization molding time of rubber can be shortened as compared with the conventional one. It has become.
【００１６】尚、このゴムクロ−ラにおいて、キャビテ
イ内の所定個所例えば角部の先端部位やゴムラグの先端
部位に、超高分子量のポリエチレン製の先端部材をはめ
込んでおくことにより、これらと一体成形が可能となる
ことは言うまでもない。In this rubber crawler, an ultra-high molecular weight polyethylene tip member is fitted at a predetermined portion in the cavity, for example, a tip portion of a corner or a tip portion of a rubber lug, so that it can be integrally molded with them. It goes without saying that it will be possible.
【００１７】[0017]
【発明の効果】本発明は以上の通りのゴムクロ−ラ及び
その製法にあって、ゴムクロ−ラの構造として言えば、
ゴムの使用量が低減され軽量化が図られると共に、製法
の面から言えば、ゴム材料にかかる熱伝導面での改善に
よって加硫成形時間が短縮されるメリットがあるもの
で、ゴムクロ−ラのコストの低減効果は大きい。Industrial Applicability The present invention is a rubber crawler and a method for producing the same as described above.
In addition to reducing the amount of rubber used and making it lighter in weight, in terms of the manufacturing method, there is the advantage that the vulcanization molding time can be shortened by improving the heat conduction surface of the rubber material. The cost reduction effect is great.
【図１】図１は本発明の第１におけるゴムクロ−ラの第
１実施例を示す内周面の平面図である。FIG. 1 is a plan view of an inner peripheral surface showing a first embodiment of a rubber crawler according to the first aspect of the present invention.
【図２】図２は図１のゴムクロ−ラの外周面の平面図で
ある。FIG. 2 is a plan view of an outer peripheral surface of the rubber crawler of FIG.
【図３】図３は図１のゴムクロ−ラの側面図である。FIG. 3 is a side view of the rubber crawler of FIG.
【図４】図４は図１におけるＡ−Ａ線での断面図であ
る。4 is a cross-sectional view taken along the line AA in FIG.
【図５】図５は図１におけるＢ−Ｂ線での断面図であ
る。5 is a cross-sectional view taken along line BB in FIG.
【図６】図６は本発明の第１におけるゴムクロ−ラの第
２実施例を示す断面図である。FIG. 6 is a sectional view showing a second embodiment of the rubber crawler according to the first aspect of the present invention.
【図７】図７は本発明の第１におけるゴムクロ−ラの第
３実施例を示す断面図である。FIG. 7 is a sectional view showing a third embodiment of the rubber crawler according to the first aspect of the present invention.
【図８】図８はゴムクロ−ラを加硫成形する際に用いら
れるモ−ルドの断面図である。FIG. 8 is a sectional view of a mold used in vulcanizing and molding a rubber crawler.
１‥‥ゴムクロ−ラの基体をなす無端状のゴム弾性体、 ２‥‥ゴム弾性体の内周面に設けられた角部、 ３‥‥ゴム弾性体の外周側のゴムラグ、 ４‥‥ゴム弾性体中に埋設された抗張体（スチ−ルコ−
ド列）、 ５、５1 ‥‥角部に向かって構成された窪み、 １１‥‥上モ−ルド、 １２‥‥ゴムラグを形成する凹部、 １３‥‥下モ−ルド １４‥‥角部を形成する凹部、 １５‥‥上下モ−ルドにて形成されるキャビテイ、 １６‥‥上モ−ルドに形成された膨突部、 ２１‥‥キャビテイ内に張設されたスチ−ルコ−ド列。1 ... Endless rubber elastic body that forms the base of the rubber crawler, 2 ... Corners provided on the inner peripheral surface of the rubber elastic body, 3 ... Rubber lug on the outer peripheral side of the rubber elastic body, 4 ... Rubber A tensile body (steel coil) embedded in an elastic body.
Row), 5, 5 1 ... a recess formed toward the corner, 11 ... an upper mold, 12 ... a recess forming a rubber lug, 13 ... a lower mold 14 ... the corner. Recesses to be formed, 15 ... cavities formed by upper and lower molds, 16 ... bulging parts formed on the upper mold, 21 ... steel cord rows stretched in the cavities.
Claims (6)
って抗張体が埋設され、その内周面側にスプロケットと
の係合部となるゴム製角部と、外周面側にゴムラグとが
形成されたゴムクロ−ラにあって、角部に対向して窪み
を形成したことを特徴とするゴムクロ−ラの構造。1. A tensile body is embedded in an endless rubber elastic body in the longitudinal direction thereof, a rubber corner portion serving as an engagement portion with a sprocket is formed on an inner peripheral surface side thereof, and a rubber lug is formed on an outer peripheral surface side thereof. A structure of the rubber crawler in which a dent is formed so as to face a corner portion in the rubber crawler formed with.
れた請求項第１項記載のゴムクロ−ラ。2. The rubber crawler according to claim 1, wherein the recess is formed on the outer peripheral side of the rubber crawler.
れ、抗張体の埋設部位より内側に達している請求項第１
項記載のゴムクロ−ラの構造。3. The depression is formed on the outer peripheral side of the rubber crawler and reaches the inside of the embedded portion of the tensile body.
The structure of the rubber crawler described in the item.
れ、ゴムクロ−ラの内周面より角部内にまで達している
請求項第１項記載のゴムクロ−ラの構造。4. The structure of the rubber crawler according to claim 1, wherein the recess is formed on the outer peripheral side of the rubber crawler and extends from the inner peripheral surface of the rubber crawler to the inside of the corner.
記載のゴムクロ−ラの構造。5. The structure of the rubber crawler according to claim 1, wherein the recess penetrates a corner.
ルドにて形成されたキャビテイ内にゴム材料を充満させ
て加硫形成してなるゴムクロ−ラの製法にあって、ゴム
クロ−ラの内周側に突出する角部を形成する凹部をモ−
ルド面に形成し、これに対向するモ−ルド面に膨突部を
形成し、角部を形成する両モ−ルド面の間隔をせまくし
たことを特徴とするゴムクロ−ラの製法。6. The upper and lower open molds are combined to form both molds.
In a method of manufacturing a rubber crawler in which a cavity formed by a cylinder is filled with a rubber material and vulcanized, a recess forming a corner protruding toward the inner peripheral side of the rubber crawler is molded.
A method for producing a rubber crow, which is characterized in that it is formed on a mold surface, a bulge portion is formed on a mold surface opposite to the mold surface, and a space between both mold surfaces forming a corner is narrowed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12063893A JP3265550B2 (en) | 1993-04-22 | 1993-04-22 | Rubber Crawler Structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12063893A JP3265550B2 (en) | 1993-04-22 | 1993-04-22 | Rubber Crawler Structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06305460A true JPH06305460A (en) | 1994-11-01 |
| JP3265550B2 JP3265550B2 (en) | 2002-03-11 |
Family
ID=14791178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12063893A Expired - Lifetime JP3265550B2 (en) | 1993-04-22 | 1993-04-22 | Rubber Crawler Structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3265550B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1486405A1 (en) * | 2002-03-15 | 2004-12-15 | Fukuyama Gomu Kogyo Kabushiki Kaisha | Rubber crawler and crawler traveling equipment |
| JP2006088664A (en) * | 2004-09-27 | 2006-04-06 | Bridgestone Corp | Manufacturing method for rubber crawler |
| WO2012111677A1 (en) * | 2011-02-15 | 2012-08-23 | 株式会社ブリヂストン | Rubber crawler |
-
1993
- 1993-04-22 JP JP12063893A patent/JP3265550B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1486405A1 (en) * | 2002-03-15 | 2004-12-15 | Fukuyama Gomu Kogyo Kabushiki Kaisha | Rubber crawler and crawler traveling equipment |
| EP1486405A4 (en) * | 2002-03-15 | 2006-11-15 | Fukuyama Rubber Ind | Rubber crawler and crawler traveling equipment |
| JP2006088664A (en) * | 2004-09-27 | 2006-04-06 | Bridgestone Corp | Manufacturing method for rubber crawler |
| JP4575095B2 (en) * | 2004-09-27 | 2010-11-04 | 株式会社ブリヂストン | Manufacturing method of rubber crawler |
| WO2012111677A1 (en) * | 2011-02-15 | 2012-08-23 | 株式会社ブリヂストン | Rubber crawler |
| JP2012166714A (en) * | 2011-02-15 | 2012-09-06 | Bridgestone Corp | Rubber crawler |
| EP2644481A1 (en) * | 2011-02-15 | 2013-10-02 | Bridgestone Corporation | Rubber crawler |
| EP2644481A4 (en) * | 2011-02-15 | 2014-07-30 | Bridgestone Corp | Rubber crawler |
| US9211923B2 (en) | 2011-02-15 | 2015-12-15 | Bridgestone Corporation | Rubber crawler |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3265550B2 (en) | 2002-03-11 |
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