JPH05278647A - Elastic crawler - Google Patents

Abstract

PURPOSE:To prevent the generation of a crack at right and left lugs, their joint part and around the joint part and improve durability. CONSTITUTION:In an elastic crawler 1, in the elastic endless band-like crawler body 2 of which a core bar 3, tensile body 4, etc., are embedded and on the outer peripheral grounding side of which many lugs 7 are provided, and which has a joint part 6 at the center in the cross direction of the crawler body 2, one or a plurality of grooves 8 are provided at the boarder of the lug 7 and joint part 6 or at the joint part 6 to absorb local strain.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、農業機械、建設機械、
各種運搬車、雪上車等で用いる主としてゴム等の弾性材
料からなる無端帯状の弾性クローラに関するものであ
る。BACKGROUND OF THE INVENTION The present invention relates to agricultural machinery, construction machinery,
The present invention relates to an endless belt-shaped elastic crawler mainly made of an elastic material such as rubber, which is used in various vehicles and snow vehicles.

【０００２】[0002]

【従来の技術】従来、この種弾性クローラとして、図７
及び図８に例示するものが知られている。即ち、このク
ローラ11は、ゴム等の弾性材料からなる無端帯状クロー
ラ本体12内に、該本体12の幅方向に伸延し周方向に所定
間隔をもって芯金13が多数埋設されると共に、該芯金13
と外周接地側との間に周方向にスチールコード等からな
る抗張体14が埋設され、外周接地側に多数のラグ15が左
右に突設されている。2. Description of the Related Art Conventionally, as this kind of elastic crawler, FIG.
And the one illustrated in FIG. 8 is known. That is, the crawler 11 is composed of an endless belt-shaped crawler body 12 made of an elastic material such as rubber, in which a large number of cored bars 13 extend in the width direction of the main body 12 and are circumferentially spaced at predetermined intervals. 13
A tensile body 14 made of steel cord or the like is embedded in the circumferential direction between the outer peripheral contact side and the outer peripheral contact side, and a large number of lugs 15 project left and right on the outer peripheral contact side.

【０００３】そして、クローラ本体12の幅方向中央には
一定の間隔で駆動輪（スプロケット) が係合する係合孔
16が設けられ、前記ラグ15はクローラ本体12の幅方向中
央部に、ラグ15の高さよりも低い継ぎ部17が設けられて
おり、該継ぎ部17は芯金13の中央部を保護している。An engaging hole is formed in the center of the crawler body 12 in the width direction so that the drive wheels (sprocket) are engaged at regular intervals.
16 is provided, the lug 15 is provided in the widthwise central portion of the crawler body 12, a joint portion 17 lower than the height of the lug 15 is provided, and the joint portion 17 protects the central portion of the cored bar 13. There is.

【０００４】[0004]

【発明が解決しようとする課題】ところで、上記従来技
術では、使用時の回動によって図７及び図９に点線18及
び19で示すように、ラグ15と継ぎ部17の境界部分に局部
的な歪（伸びの差) によるクラック等が発生し、このク
ラック18,19 の成長に伴い、雨水や土砂等がクラック1
8,19 に侵入して、芯金13や抗張体14に錆が発生し、芯
金13、抗張体14及びクローラ本体12の切損に至るという
問題がある。By the way, in the above-mentioned prior art, as shown by the dotted lines 18 and 19 in FIGS. 7 and 9, the rotation at the time of use causes a local difference at the boundary between the lug 15 and the joint 17. Cracks due to strain (difference in elongation) occur, and as the cracks 18 and 19 grow, rainwater, earth and sand, etc. crack 1.
There is a problem that the core metal 13, the tensile body 14 and the crawler main body 12 are damaged due to the rusting of the core metal 13 and the tensile body 14 by invading the 8,19.

【０００５】本発明は、上述のような実状に鑑みてなさ
れたもので、その目的とするところは、左右のラグとそ
の継ぎ部及びその周辺でのクラックの防止及び雨水や土
砂の侵入による芯金、抗張体等の切損、クローラ本体の
破断を防止できる弾性クローラを提供するにある。The present invention has been made in view of the above-mentioned circumstances, and its object is to prevent cracks at the left and right lugs and their joints and their surroundings, and to prevent wicks from entering rainwater or earth and sand. Another object of the present invention is to provide an elastic crawler capable of preventing damage to gold, a tensile body, etc., and breaking of the crawler body.

【０００６】[0006]

【課題を解決するための手段】本発明では、上記目的を
達成するために、次の技術的手段を講じた。即ち、本発
明は、弾性材料からなる無端帯状のクローラ本体内に、
抗張体等の補強材が埋入され、外周接地側に多数のラグ
を備えかつ該ラグのクローラ本体幅方向中央に継ぎ部を
有する弾性クローラにおいて、前記ラグと継ぎ部の境界
又は継ぎ部に１又は複数の溝を設けたことを特徴として
いる。In order to achieve the above object, the present invention takes the following technical means. That is, the present invention, in the endless belt-shaped crawler body made of elastic material,
In an elastic crawler in which a reinforcing material such as a tensile body is embedded, and which is provided with a large number of lugs on the outer peripheral ground side and has a joint at the center of the crawler body width direction of the lug, at the boundary between the lug and the joint or at the joint. It is characterized in that one or more grooves are provided.

【０００７】[0007]

【作用】本発明によれば、ラグと継ぎ部の境界又は継ぎ
部の溝によって、走行中における左右のラグと継ぎ部境
界の局部的な歪即ち伸びの差を吸収し、クラックの発生
が防止される。According to the present invention, the boundary between the lug and the joint portion or the groove in the joint portion absorbs the local strain, that is, the difference in elongation between the left and right lugs and the joint portion during traveling, and prevents the occurrence of cracks. To be done.

【０００８】[0008]

【実施例】以下、本発明の実施例を図面に基づき説明す
る。図１及び図２は本発明の第１実施例を示し、弾性ク
ローラ1 は、ゴム等の弾性材料からなる無端帯状のクロ
ーラ本体2 と、該本体2 内に埋設された芯金3 、スチー
ルコード等からなる抗張体4 、キャンバス5 などから成
っている。Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention, in which an elastic crawler 1 is an endless crawler main body 2 made of an elastic material such as rubber, a cored bar 3 embedded in the main body 2, a steel cord. Tensile body 4 and canvas 5, etc.

【０００９】前記クローラ本体2 の外周接地側には、該
本体2 の幅方向中央部の継ぎ部6 を介して左右のラグ7,
7 が周方向に所定の間隔で突設され、継ぎ部6 の高さは
ラグ7 の高さよりも低くされており、該継ぎ部6 とラグ
7 の境界部に、周方向に伸びる溝8,8 が夫々設けられて
いる。前記芯金3 は、図２に示すように、左右一対の芯
金翼部3Aを中央の連結部3Bで一体的に連結すると共に、
前記翼部3Aの連結部3B側端部に転輪案内突起3Cを備え、
連結部3Bの中央に図外の駆動輪（スプロケット) が咬み
合う係合孔9 が設けられており、前記クローラ本体2 内
に、前記翼部3Aがラグ7 間に位置しかつ転輪案内突起3C
がクローラ本体2 の内周反接地側に突出するように所定
の間隔で埋設されている。On the outer peripheral ground side of the crawler body 2, there are left and right lugs 7, via a joint portion 6 at the center of the body 2 in the width direction.
7 are projected at a predetermined interval in the circumferential direction, and the height of the joint 6 is lower than the height of the lug 7.
Grooves 8 and 8 extending in the circumferential direction are provided at the boundary of 7. As shown in FIG. 2, the core metal 3 integrally connects a pair of left and right core metal wings 3A with a central connecting portion 3B, and
The wing portion 3A is provided with a wheel guide protrusion 3C at the end of the connecting portion 3B side,
An engaging hole 9 for engaging a drive wheel (sprocket) (not shown) is provided in the center of the connecting portion 3B, and the wing portion 3A is located between the lugs 7 and the rolling wheel guide projection is provided in the crawler body 2. 3C
Are embedded in the crawler body 2 at a predetermined interval so as to project to the inner peripheral anti-ground side.

【００１０】そして、前記クローラ本体2 の幅方向中央
には、各芯金3 の連結部3B間に位置して図外の駆動輪が
咬み合う係合孔10が設けられており、前記ラグ継ぎ部6
は芯金連結部3Bの接地側面を保護している。前記抗張体
4 は、クローラ本体2 の幅方向に左右振分け状に係合孔
9,10を挟んで、芯金3 の接地側に周方向に埋設されてい
る。また、該抗張体4 と芯金3 の間にキャンバス5 が埋
設されている。なお、キャンバス5 は、抗張体4 の接地
面側に埋設し、或いは抗張体4 全体を包むように設ける
ことができる。At the center of the crawler body 2 in the width direction, there is provided an engaging hole 10 located between the connecting portions 3B of the cores 3 for engaging drive wheels (not shown). Part 6
Protects the grounding side surface of the core metal connecting portion 3B. The tensile body
4 is an engaging hole that is distributed in the width direction of the crawler body 2
It is embedded in the circumferential direction on the grounding side of the cored bar 3 with 9 and 10 in between. A canvas 5 is embedded between the tensile body 4 and the core metal 3. The canvas 5 can be embedded in the ground plane side of the tensile body 4 or provided so as to wrap the entire tensile body 4.

【００１１】前記溝8 の深さＤは、局部的な歪を吸収す
るに十分な寸法とされ、芯金3 の接地側面から継ぎ部6
の表面までの高さＨに比例して設定するのが好ましい。
上記第１実施例において、クローラ1 を走行駆動させた
場合、ラグ7 と継ぎ部6 の境界部分における局部的伸び
の差即ち歪は、溝8 によって吸収され、クラック等が発
生せず、雨水や土砂が侵入して芯金3 や抗張体4 を錆さ
せることがなく、芯金3 の折損、抗張体4 及びクローラ
本体2 の破断を防止でき、クローラ１の耐久性を大幅に
向上させることができ、特に芯金3 間にラグ7 を配設し
た本実施例における効果は格別顕著である。The depth D of the groove 8 is set to a size sufficient to absorb the local strain, and the depth of the groove 8 from the ground side surface of the core metal 3 to the joint 6 is reduced.
It is preferable to set it in proportion to the height H to the surface.
In the first embodiment, when the crawler 1 is driven to travel, the difference in local elongation at the boundary portion between the lug 7 and the joint portion 6, that is, strain, is absorbed by the groove 8 and no cracks or the like occur, and rainwater or The earth and sand do not invade the cored bar 3 and the tensile body 4 and prevent breakage of the cored bar 3 and breakage of the tensile body 4 and the crawler body 2 and greatly improve the durability of the crawler 1. In particular, the effect of this embodiment in which the lug 7 is arranged between the cored bar 3 is particularly remarkable.

【００１２】図３は本発明の第２実施例を示すもので、
第１実施例と異なるところは、芯金3 の連結部3Bに駆動
輪の係合孔を備えていない点であり、その他の構成及び
作用効果は第１実施例と同じであるから、図１と同符号
を付し詳細説明を省略する。図４は本発明の第３実施例
を示すもので、第１実施例と異なるところは、溝8が各
継ぎ部6 と左右いずれか一方のラグ7 との境界部１カ所
に設けられている点であり、その他の構成及び作用効果
は第１実施例と同じであるから、図１と同符号を付し詳
細説明を省略する。FIG. 3 shows a second embodiment of the present invention.
The difference from the first embodiment is that the connecting portion 3B of the cored bar 3 is not provided with an engaging hole for a drive wheel, and the other configurations and effects are the same as those of the first embodiment. The same reference numerals are given to omit detailed description. FIG. 4 shows a third embodiment of the present invention. The difference from the first embodiment is that a groove 8 is provided at one boundary portion between each joint 6 and either one of the left and right lugs 7. The other points are the same as those of the first embodiment in other configurations and operational effects, and therefore the same reference numerals as in FIG.

【００１３】図５は本発明の第４実施例を示し、第１実
施例と異なるところは、溝8 が各継ぎ部6 の左右ラグ7,
7 間中央１カ所に設けられている点であり、その他の構
成及び作用効果は第１実施例と同じであるから、図２と
同符号を付し詳細説明を省略する。図６は本発明の第５
実施例を示し、第１実施例と異なるところは、継ぎ部6
の高さとラグ7 の高さが同じとされている点であり、そ
の他の構成及び作用効果は第１実施例と同じであるか
ら、図１と同符号を付し詳細説明を省略する。FIG. 5 shows a fourth embodiment of the present invention. The difference from the first embodiment is that the groove 8 has left and right lugs 7, 7 of each joint 6.
Since it is provided at one place in the center between 7 and other configurations and operational effects are the same as those of the first embodiment, the same reference numerals as in FIG. 2 are given and detailed description thereof is omitted. FIG. 6 shows the fifth aspect of the present invention.
An embodiment is shown, and the difference from the first embodiment is that the joint 6
The height of the lug 7 is the same as the height of the lug 7. Since the other constructions and effects are the same as those of the first embodiment, the same reference numerals as those in FIG.

【００１４】本発明は、上記実施例に限定されるもので
はなく、例えば、ラグが芯金に対応している弾性クロー
ラは勿論のこと、他のラグ形状のもの或いはラグが千鳥
状に配設されている弾性クローラにも採用することがで
きる。The present invention is not limited to the above-described embodiment. For example, not only an elastic crawler whose lug corresponds to a cored bar but also other lug shapes or lugs arranged in a zigzag pattern. It can also be used for elastic crawlers.

【００１５】[0015]

【発明の効果】本発明は、上述のように、弾性材料から
なる無端帯状のクローラ本体内に、抗張体等の補強材が
埋入され、外周接地側に多数のラグを備えかつ該ラグの
クローラ本体幅方向中央に継ぎ部を有する弾性クローラ
において、前記ラグと継ぎ部の境界又は継ぎ部に１又は
複数の溝を設けたことを特徴とするものであるから、左
右のラグとその継ぎ部及びその周辺部分でのクラック発
生及び雨水、土砂等が芯金や抗張体にまで侵入するのを
防止でき、芯金や抗張体は勿論のことクローラ本体の破
断を防止できるので、弾性クローラの耐久性が向上す
る。As described above, according to the present invention, a reinforcing material such as a tensile member is embedded in an endless belt-shaped crawler body made of an elastic material, and a large number of lugs are provided on the outer peripheral ground side and the lugs are provided. In the elastic crawler having a joint at the center in the width direction of the crawler body, one or a plurality of grooves are provided at the boundary between the lug and the joint or at the joint. Since it is possible to prevent cracks and rainwater, earth and sand, etc. from entering the core part and its surroundings and even intruding into the core bar and the tensile body, it is possible to prevent breakage of the core bar and the tensile body as well as the crawler body. The durability of the crawler is improved.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の第１実施例を示す接地側平面図であ
る。FIG. 1 is a ground-side plan view showing a first embodiment of the present invention.

【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.

【図３】本発明の第２実施例を示す接地側平面図であ
る。FIG. 3 is a ground-side plan view showing a second embodiment of the present invention.

【図４】本発明の第３実施例を示す接地側平面図であ
る。FIG. 4 is a ground-side plan view showing a third embodiment of the present invention.

【図５】本発明の第４実施例を示す接地側平面図であ
る。FIG. 5 is a ground-side plan view showing a fourth embodiment of the present invention.

【図６】本発明の第５実施例を示す断面図である。FIG. 6 is a sectional view showing a fifth embodiment of the present invention.

【図７】従来例を示す接地側平面図である。FIG. 7 is a ground-side plan view showing a conventional example.

【図８】図７のＢ−Ｂ線断面図である。8 is a cross-sectional view taken along line BB of FIG.

【図９】図７におけるクラック発生の他の例を示す接地
側平面図である。9 is a ground-side plan view showing another example of crack generation in FIG. 7. FIG.

【符号の説明】[Explanation of symbols]

１ 弾性クローラ ２ クローラ本体 ３ 芯金 ４ 抗張体 ６ 継ぎ部 ７ ラグ ８ 溝 1 Elastic Crawler 2 Crawler Main Body 3 Core Bar 4 Tensile Body 6 Joint 7 Lug 8 Groove

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 弾性材料からなる無端帯状のクローラ本
体内に、抗張体等の補強材が埋入され、外周接地側に多
数のラグを備えかつ該ラグのクローラ本体幅方向中央に
継ぎ部を有する弾性クローラにおいて、前記ラグと継ぎ
部の境界又は継ぎ部に１又は複数の溝を設けたことを特
徴とする弾性クローラ。1. An endless belt-shaped crawler main body made of an elastic material, in which a reinforcing material such as a tensile member is embedded, a large number of lugs are provided on the outer peripheral ground side, and a joint portion is provided at the center of the crawler main body in the width direction of the lugs. The elastic crawler having the above-mentioned, wherein one or a plurality of grooves are provided at a boundary between the lug and the joint or the joint.