JP5319249B2 - Elastic track - Google Patents
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- JP5319249B2 JP5319249B2 JP2008297054A JP2008297054A JP5319249B2 JP 5319249 B2 JP5319249 B2 JP 5319249B2 JP 2008297054 A JP2008297054 A JP 2008297054A JP 2008297054 A JP2008297054 A JP 2008297054A JP 5319249 B2 JP5319249 B2 JP 5319249B2
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Description
本発明は、クローラ式走行車両に装着される弾性履帯に関する。 The present invention relates to an elastic crawler belt mounted on a crawler type traveling vehicle.
ミニショベル等の土木工事用クローラ式走行車両に装着される弾性履帯では、ラグは、弾性履帯幅方向に交互に千鳥状に配され、または芯金の１〜２ピッチごとに配される場合が多い。また、土木工事用の弾性履帯におけるラグは、周方向において芯金の幅全体と重なるように、または隣り合う２つの芯金に跨る程度に大きく形成される。そして、土木工事用の弾性履帯は、泥の付着等を少なくするために隣り合うラグの間が広くなっており、全体としてラグの総接地面積が小さい。 In an elastic crawler belt mounted on a crawler-type traveling vehicle for civil engineering work such as a mini excavator, the lugs may be alternately arranged in a staggered manner in the elastic crawler width direction, or may be arranged every one to two pitches of the core metal. Many. Moreover, the lug in the elastic crawler belt for civil engineering work is formed large enough to overlap the entire width of the core metal in the circumferential direction or straddle two adjacent core bars. The elastic crawler belt for civil works has a wide space between adjacent lugs in order to reduce mud adhesion and the like, and the total contact area of the lugs as a whole is small.
一方、芝等の緑化管理用に使用されるトラックローダーに装着される弾性履帯のラグは、芝等を痛めないように、通常分断されたブロックが弾性履帯幅方向に１列に並べて形成されており、ブロックに分割されて各ブロック間は比較的密にされて接地面の面圧を下げている。また、緑化管理に使用される弾性履帯は、大きな強度が要求されないことから、芯金を有さず、または有していても芯金は棒状の細いものであることが多い。 On the other hand, the elastic crawler lug attached to the track loader used for greening management of turf etc. is usually formed by dividing the divided blocks in a row in the elastic crawler width direction so as not to damage the turf etc. The blocks are divided into blocks, and the blocks are relatively dense to reduce the contact pressure of the ground contact surface. In addition, since the elastic crawler belt used for greening management does not require a high strength, the core bar does not have a core bar or has a core bar in many cases.
このように、土木工事用クローラ式走行車両に装着される弾性履帯と緑化管理用に使用されるトラックローダーに装着される弾性履帯とはその構成が異なる。そのため、例えば、土木工事用弾性履帯を緑化管理用のトラックローダーに装着して使用すると、ラグ間が大きく総接地面が小さいことから接地面の面圧が高く、旋回時に芝切れを生じさせる等の問題が生ずる。 Thus, the structure differs between the elastic crawler belt mounted on the crawler type traveling vehicle for civil engineering work and the elastic crawler belt mounted on the track loader used for greening management. Therefore, for example, when an elastic crawler track for civil engineering is installed on a track loader for greening management, the contact surface is high because the gap between the lugs is large and the total contact surface is small. Problem arises.
また、緑化管理用弾性履帯を土木工事用走行車両に装着して使用すると、緑化管理用弾性履帯は、その剛性が低いために走行車両から脱輪し易く、脱輪を防止するためには、走行車両本体に転輪の脱輪防止ガイド等の対策を講ずる必要がある等の問題がある。
ブルドーザおよび油圧ショベル等の土木工事用走行車両に装着して使用される弾性履帯においては、走行中の弾性履帯の脱落が弾性履帯の剛性が低いことに起因するとして、剛性が向上された、幅方向に対して傾斜するラグが幅方向両側に千鳥状に配され、かつ幅方向両側のラグの接地面が幅方向中央で連続する弾性履帯が提案されている（特許文献１）。
For elastic crawler belts used on civil engineering traveling vehicles such as bulldozers and hydraulic excavators, the width of the crawler is improved because the drop of the elastic crawler belt during travel is caused by the low rigidity of the elastic crawler belt. There has been proposed an elastic crawler belt in which lugs inclined with respect to the direction are arranged in a staggered manner on both sides in the width direction, and the ground contact surfaces of the lugs on both sides in the width direction are continuous at the center in the width direction (Patent Document 1).
特許文献１に記載された剛性を高める工夫がなされた弾性履帯は、トラックローダー等に装着する場合に、剛性が高く曲がりにくいために装着が容易でなく、また装着されたト
ラックローダーは、その剛性の高さのために動力ロスにより燃費が悪化することが予想される。
本発明は、上述の問題に鑑みてなされたもので、土木工事用クローラ式走行車両および緑化管理用クローラ式走行車両のいずれにもこれら車両の機能を損なうことなく装着可能な弾性履帯を提供することを目的とする。
The elastic crawler belt devised to increase the rigidity described in Patent Document 1 is not easy to mount because it is rigid and difficult to bend when mounted on a track loader or the like. It is expected that the fuel efficiency will deteriorate due to the power loss due to the height.
The present invention has been made in view of the above problems, and provides an elastic crawler belt that can be mounted on any of a crawler traveling vehicle for civil engineering work and a crawler traveling vehicle for greening management without impairing the functions of these vehicles. For the purpose.
本発明に係る弾性履帯は、ゴムにより無端帯状に形成された履帯本体と、前記履帯本体の周方向に間隔を有して前記履帯本体に埋め込まれた複数の芯金と、前記履帯本体の幅方向一方の側および他方の側においてそれぞれ前記履帯本体の外周側の表面から突出する複数のラグと、で形成されており、複数の前記ラグは、そのすべてまたはその一部が複数の前記芯金と周方向において重なるように配され、前記幅方向の両側でそれぞれ前記周方向に隣り合う前記ラグの間隔は、前記幅方向の中央からの距離が前記履帯本体の幅寸法の半分のさらに３分の１から４分の３の位置で最も狭くなるように形成され、前記ラグの前記外周側における端面である接地面の総面積Ｌが、前記履帯本体を前記外周側から見たときの総面積Ｓに対して３５％以上である。 The elastic crawler belt according to the present invention includes a crawler belt body formed in an endless belt shape with rubber, a plurality of core bars embedded in the crawler belt body at intervals in the circumferential direction of the crawler belt body, and a width of the crawler belt main body A plurality of lugs projecting from the outer peripheral surface of the crawler belt body on one side and the other side, respectively, and the plurality of lugs are all or part of the plurality of core bars. The distance between the lugs adjacent to each other in the circumferential direction on the both sides in the width direction is an additional 3 minutes that the distance from the center in the width direction is half the width dimension of the crawler belt body. The total area L of the ground contact surface which is the end surface on the outer peripheral side of the lug is the total area when the crawler belt body is viewed from the outer peripheral side. 35% or more against S A.
前記周方向に隣り合う前記ラグの間隔が最も狭くなる位置における前記履帯本体の表面は、凹状の湾曲面である。
前記ラグを、前記幅方向両側のいずれにおいても、前記幅方向の中央から前記幅方向端に向けて全体として前記周方向の同じ一方の側に傾斜して伸びるものとしてもよい。
前記周方向に隣り合う前記ラグの間隔は、これらの間隔が最も狭くなる前記位置から前記幅方向の中央および端縁に向かうにつれてそれぞれ徐々に拡がる。
The surface of the crawler belt main body at the position where the interval between the lugs adjacent in the circumferential direction is the narrowest is a concave curved surface.
The lug may be inclined and extended toward the same one side in the circumferential direction as a whole from the center in the width direction toward the end in the width direction on both sides in the width direction.
The distance between the lugs adjacent in the circumferential direction gradually increases from the position where the distance is the narrowest toward the center and the edge in the width direction.
前記弾性履帯において、前記幅方向の両側における前記ラグはいずれも２以上の異なる形状のラグで構成され、かつ前記幅方向に並ぶ前記ラグの形状が異なる構成としてもよい。
好ましくは、前記芯金はその長手方向両端側にそれぞれ板状の翼部を備え、前記翼部は、前記幅方向に延びた前記周方向両側の端縁の近傍がいずれも当該端縁が前記履帯本体の内周側となるように折り曲げられまたは湾曲されており、折り曲げられまたは湾曲された前記周方向両側の端縁の近傍の一部または全部が、前記周方向において前記ラグと重なるように形成される。
In the elastic crawler belt, each of the lugs on both sides in the width direction may be composed of two or more different shapes of lugs, and the lugs arranged in the width direction may have different shapes.
Preferably, the cored bar is provided with plate-like wings on both ends in the longitudinal direction, and the wings are located in the vicinity of both edges in the circumferential direction extending in the width direction. It is bent or curved so as to be on the inner peripheral side of the crawler belt main body, and a part or all of the vicinity of the edge on both sides in the circumferential direction that is bent or curved overlaps with the lug in the circumferential direction. It is formed.
好ましくは、前記翼部よりも前記外周側に配され前記幅方向両側に埋め込まれた１対の抗張体を有し、少なくとも前記周方向に隣り合う前記芯金間における前記抗張体の前記内周側でありかつ前記芯金における最も内周側に位置する部分よりも外周側である部分の一部または全部に、その他の部分よりも低い硬度５５〜６８度のゴムが使用される。 Preferably, it has a pair of tensile bodies arranged on the outer peripheral side of the wing portion and embedded on both sides in the width direction, and at least the tensile body between the core bars adjacent in the circumferential direction. A rubber having a hardness of 55 to 68 degrees lower than that of the other part is used for a part or all of the part on the inner peripheral side and on the outer peripheral side with respect to the innermost peripheral part of the core metal.
本発明によると、土木工事用クローラ式走行車両および緑化管理用クローラ式走行車両のいずれにもこれら車両の機能を損なうことなく装着可能な弾性履帯を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the elastic crawler belt which can be mounted | worn without impairing the function of these vehicles can be provided to both the crawler type traveling vehicle for civil engineering, and the crawler type traveling vehicle for greening management.
図１は弾性履帯１を接地側から見た図、図２は図１におけるＡ−Ａ矢視断面図、図３は図１におけるＢ−Ｂ矢視断面図である。
以下の説明において、クローラ式走行車両に装着されたときにおける弾性履帯１の接地側を「外周側」といい、接地側の反対側を「内周側」という。また、クローラ式走行車両が走行するときに弾性履帯１が循環する方向を「周方向」、このときの周方向に直交し、かつクローラ式走行車両の転輪等の回転軸に平行な方向を「幅方向」というものとする。
1 is a view of the elastic crawler belt 1 viewed from the grounding side, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB in FIG.
In the following description, the grounding side of the elastic crawler belt 1 when mounted on a crawler type traveling vehicle is referred to as “outer peripheral side”, and the opposite side of the grounding side is referred to as “inner peripheral side”. Further, the direction in which the elastic crawler belt 1 circulates when the crawler type traveling vehicle travels is the “circumferential direction”, and the direction orthogonal to the circumferential direction at this time and parallel to the rotation axis of the crawler type traveling vehicle such as a wheel. It shall be called “width direction”.
図１ないし図３を参照して、弾性履帯１は、芯金２，…，２、履帯本体３、ラグ４，…，４および１対の抗張体５，５等からなる。
芯金２は、金属等の硬質材料によって形成される。芯金２は、全体として略長い芯金本体１１および１対の突起部１２，１２からなる。
芯金本体１１は、その長手方向の両端から中央に向けて一定の長さが板状の翼部１３，１３となっている。翼部１３は、図３に示されるように、その周方向両側の端近傍の所定
の幅Ｗの部分が、内周側に曲げ角度θで折り曲げられている（以下、周方向両側の端近傍の所定の幅Ｗの部分を「折り曲げ部１４」という）。各折り曲げ部１４，１４の「所定の幅Ｗ」とは、芯金２が履帯本体３に埋め込まれたときに周方向両端間の距離（折り曲げられた状態である）Ｗａを基準として、翼部１３の周方向両端間の距離Ｗａに対して略３分の１〜５分の１である。なお、折り曲げ部１４の幅Ｗは、外周側の面における寸法が基準となる。折り曲げ部１４の曲げ角度θは、１０度以上４５度以下が採用される。
1 to 3, the elastic crawler belt 1 includes core bars 2,..., 2, a crawler belt body 3, lugs 4,..., 4 and a pair of tensile members 5, 5.
The cored bar 2 is formed of a hard material such as metal. The core metal 2 includes a substantially long core metal body 11 and a pair of protrusions 12 and 12 as a whole.
The cored bar body 11 has plate-like wings 13 and 13 having a certain length from both ends in the longitudinal direction toward the center. As shown in FIG. 3, the wing portion 13 is bent at a predetermined angle W near the ends on both sides in the circumferential direction at the bending angle θ on the inner circumference side (hereinafter, near the ends on both sides in the circumferential direction). A portion having a predetermined width W is referred to as a “folded portion 14”). The “predetermined width W” of each of the bent portions 14 and 14 is a wing portion based on a distance Wa between the circumferential ends when the core metal 2 is embedded in the crawler belt body 3 (which is a bent state) Wa. 13 to 1/5 of the distance Wa between both ends in the circumferential direction. The width W of the bent portion 14 is based on the dimension on the outer peripheral surface. The bending angle θ of the bent portion 14 is 10 degrees or more and 45 degrees or less.
折り曲げ部１４を、一定の角度を有する折り曲げ線で折り曲げた形状ではなく、内周側に徐々に曲がる湾曲面として形成してもよい。
突起部１２は、芯金本体１１における折り曲げ部１４が曲がる側の表面から内周側に突出している。芯金２は、芯金本体１１の長手方向が後に説明する履帯本体３の幅方向となるようにして、履帯本体３に周方向に等間隔に埋め込まれている。
The bent portion 14 may be formed as a curved surface that gradually bends to the inner peripheral side instead of a shape bent at a bending line having a certain angle.
The protruding portion 12 protrudes from the surface on the side where the bent portion 14 of the metal core body 11 is bent toward the inner peripheral side. The core metal 2 is embedded in the crawler belt body 3 at equal intervals in the circumferential direction so that the longitudinal direction of the core metal body 11 is the width direction of the crawler belt body 3 described later.
履帯本体３は、肉厚帯状のゴムの両端が接合されて無端帯状に形成されたものである。履帯本体３は、埋め込まれた隣り合う芯金２，２の間における幅方向の中央に、内周側と外周側とを貫通する係合孔１５，…，１５を備えている。係合孔１５は、弾性履帯１が装着されるクローラ式走行車両の駆動輪の爪に係合されて、駆動輪の回転により弾性履帯１を循環運動させるためのものである。 The crawler belt main body 3 is formed in an endless belt shape by joining both ends of a thick belt rubber. The crawler belt main body 3 includes engagement holes 15,..., 15 penetrating the inner peripheral side and the outer peripheral side at the center in the width direction between the adjacent core bars 2 and 2 embedded. The engagement hole 15 is engaged with a claw of a driving wheel of a crawler type traveling vehicle to which the elastic crawler belt 1 is mounted, and causes the elastic crawler belt 1 to circulate by rotation of the driving wheel.
履帯本体３の外周側には、周方向に所定の大きさを有し、幅方向における係合孔１５の端縁近傍から幅方向の端まで拡がるラグ４が、突出している。ラグ４は、１つの係合孔１５について幅方向のいずれかの側に設けられ、周方向に並ぶ隣り合う係合孔１５，１５では幅方向について交互に、つまりラグ４，…，４は、周方向については千鳥状に設けられている。 A lug 4 having a predetermined size in the circumferential direction and extending from the vicinity of the edge of the engagement hole 15 in the width direction to the end in the width direction protrudes on the outer peripheral side of the crawler belt body 3. The lugs 4 are provided on either side in the width direction with respect to one engagement hole 15, and the adjacent engagement holes 15, 15 arranged in the circumferential direction alternately in the width direction, that is, the lugs 4,. The circumferential direction is staggered.
ラグ４は、幅方向中央側の基点となる係合孔１５に対して周方向両側に位置する芯金２，２のそれぞれの芯金本体１１，１１に、その一部が周方向において重なっている。ここで、ラグ４の上記「周方向に所定の大きさ」とは、周方向に隣り合う２つの芯金２，２に重なる程度の周方向の大きさをいうものである。ここで「周方向において重なる」とは、例えば弾性履帯１を外周側から見たときに重なる意であり、このときのラグ４の意は、履帯本体３から突出する部分全体（突出する根元（ねもと）より外周側のすべて）を含む（図１参照）。 The lug 4 is partially overlapped in the circumferential direction with each of the cored bar bodies 11, 11 of the cored bars 2, 2 located on both sides in the circumferential direction with respect to the engagement hole 15 which is a base point on the center side in the width direction. Yes. Here, the above-mentioned “predetermined size in the circumferential direction” of the lug 4 refers to a size in the circumferential direction so as to overlap two core bars 2 and 2 adjacent in the circumferential direction. Here, “overlapping in the circumferential direction” means, for example, overlapping when the elastic crawler belt 1 is viewed from the outer peripheral side, and the meaning of the lug 4 at this time is the entire portion protruding from the crawler belt body 3 (the protruding root ( (Nemoto) includes everything on the outer periphery side (see FIG. 1).
次に、ラグ４の形状を詳述する。
ラグ４における、履帯本体３から突出する根元が形作る閉じた輪郭形状、および突出端である接地面１６の端縁（輪郭）形状は、前者の方が大きいが両者は略相似形である。図１を参照して、接地面１６の輪郭（端縁）は、周方向の一方の側（図１における上側）では、履帯本体３における幅方向中央側（幅方向における係合孔１５の端近傍相当位置）から幅方向端縁に向けて、履帯本体３の幅半分の２分の１余りの位置まで幅方向に直線的に伸びている。
Next, the shape of the lug 4 will be described in detail.
In the lag 4, it closed contours root is form projecting from the track body 3, and edge (outline) shape of the ground plane 16 is a protruding end is larger in the former case both are substantially similar in shape. Referring to FIG. 1, the contour (end edge) of the ground contact surface 16 is on the one side in the circumferential direction (upper side in FIG. 1), in the width direction center side of the crawler belt body 3 (the end of the engagement hole 15 in the width direction) It extends linearly in the width direction from the position corresponding to the vicinity) to the edge in the width direction to a position that is a half of the half width of the crawler belt body 3.
その後、接地面１６の一方の側の輪郭は、周方向の他方の側に折れて幅方向端縁に向けて履帯本体３の端から一定の距離まで伸び、次に履帯本体３の端と平行に周方向の他方の側に続く。接地面１６の輪郭は、履帯本体３の端と平行に伸びた周方向の他方の側の端から、幅方向中央側に向けて、周方向の他方の側に傾斜しながら、幅方向中央から幅方向端縁までの距離の２分の１余りの位置まで直線的に伸びている。 Thereafter, the contour on one side of the ground surface 16 is folded to the other side in the circumferential direction and extends from the end of the crawler belt body 3 to a certain distance toward the edge in the width direction, and then parallel to the end of the crawler belt body 3. To the other side in the circumferential direction. The outline of the ground surface 16 is inclined from the center in the width direction while inclining toward the other side in the circumferential direction from the other end in the circumferential direction extending parallel to the end of the crawler belt body 3 toward the center in the width direction. It extends linearly to a position that is a half of the distance to the edge in the width direction.
接地面１６における周方向他方の側の輪郭は、この後、周方向一方の側に傾斜しながら幅方向中央側に伸び、伸びた端で、周方向一方の側における輪郭の起点と、周方向に延びた線で繋がる。なお、ラグ４の接地面１６も、その一部が周方向に隣り合う２つの芯金２，２のそれぞれの一部に、周方向において重なっている。
接地面１６の輪郭における直線が連結される部分は、輪郭線が角度を有して連結されるのではなく、湾曲線を介して連結されている。
Then, the contour on the other side in the circumferential direction of the ground surface 16 is extended to the center in the width direction while being inclined to one side in the circumferential direction, and is the extended end, the starting point of the contour on the one side in the circumferential direction, and the circumferential direction Connected by a line extending to A part of the grounding surface 16 of the lug 4 also overlaps in the circumferential direction with a part of each of the two core bars 2 and 2 adjacent in the circumferential direction.
The portions where the straight lines in the outline of the ground plane 16 are connected are connected via a curved line rather than being connected with an angled outline.
幅方向一方の側のラグ４および他方の側のラグ４は、（周方向の位置がずれているが）形状としては幅方向に直交する面について面対称である。
上記した形状を有し周方向に隣り合うラグ４，４は、図１に示されるように、ラグ４についての幅方向略中央で最も接近し両者のその間が最も狭くなっている。ラグ４は、周方
向の一方の側の輪郭が、幅方向中央から幅方向端縁までの距離の２分の１余りの位置から幅方向端縁に向けて、周方向の他方の側に傾斜しながら伸び、周方向の他方の側の輪郭が、幅方向端縁側から幅方向中央から幅方向端縁までの距離の２分の１余りの位置に向けて、周方向の他方の側に傾斜しながら伸びている。隣り合うラグ４，４の周方向に対向するそれぞれの側面１７ａ，１７ｂは、図３に示されるように、幅方向中央から幅方向端縁までの距離の２分の１余りの位置でその間隔が最も狭くなり、これらの間隔は、この位置から弾性履帯１の幅方向の端縁に向かうにつれて徐々に拡がる。
The lug 4 on one side in the width direction and the lug 4 on the other side are symmetrical with respect to a plane orthogonal to the width direction (although the position in the circumferential direction is shifted).
As shown in FIG. 1, the lugs 4 and 4 that have the above-described shape and are adjacent to each other in the circumferential direction are closest to each other at the approximate center in the width direction of the lug 4 and are narrowest between the two. In the lug 4, the contour on one side in the circumferential direction is inclined toward the other edge in the circumferential direction from the position of a half of the distance from the center in the width direction to the edge in the width direction toward the edge in the width direction. While extending, the contour on the other side in the circumferential direction is inclined toward the other side in the circumferential direction toward the position that is a half of the distance from the width direction edge side to the width direction center to the width direction edge. While growing. As shown in FIG. 3, the side surfaces 17 a and 17 b facing each other in the circumferential direction of the adjacent lugs 4 and 4 are spaced at a position that is a half of the distance from the center in the width direction to the edge in the width direction. Becomes the narrowest, and these intervals gradually increase from this position toward the edge of the elastic crawler belt 1 in the width direction.
また、周方向の一方の側の輪郭は、幅方向中央から幅方向端縁までの距離の２分の１余りの位置まで、幅方向に伸びている。一方、周方向の他方の側の輪郭は、幅方向中央から幅方向端縁までの距離の２分の１余りの位置から幅方向の中央側の端まで、周方向一方の側に傾斜しながら伸びている。隣り合うラグ４，４の周方向に対向するそれぞれの側面１７ａ，１７ｂの間隔は、幅方向端縁までの距離の２分の１余りの位置から幅方向の中央側に向かうにつれて徐々に拡がっている。 Further, the contour on one side in the circumferential direction extends in the width direction to a position that is a half of the distance from the center in the width direction to the edge in the width direction. On the other hand, the contour on the other side in the circumferential direction is inclined to one side in the circumferential direction from a position that is a half of the distance from the center in the width direction to the edge in the width direction to the end on the center side in the width direction. It is growing. The distance between the side surfaces 17a and 17b facing each other in the circumferential direction of the adjacent lugs 4 and 4 gradually increases from the position that is a half of the distance to the edge in the width direction toward the center in the width direction. Yes.
周方向の一方の側および周方向の他方の側における、この幅方向中央から幅方向端縁までの距離の２分の１余りの位置は、幅方向中央から幅方向端縁までの距離の３分の１から４分の３の範囲で任意に変更することができる。
また、隣り合うラグ４，４の間が最も狭くなった部分における履帯本体３の表面（外周側に露出する面）１８は、凹状となった湾曲面となっている。
On the one side in the circumferential direction and the other side in the circumferential direction, a position that is a half of the distance from the center in the width direction to the edge in the width direction is 3 of the distance from the center in the width direction to the edge in the width direction. It can be arbitrarily changed in the range of 1 to 3/4.
Moreover, the surface (surface exposed to the outer peripheral side) 18 of the crawler belt main body 3 in the narrowest portion between the adjacent lugs 4 and 4 is a concave curved surface.
弾性履帯１は、周方向に隣り合うラグ４，４間の最も狭くなった部分の履帯本体３の表面１８を凹状の湾曲面とすること、および芯金２の幅方向両側の翼部１３，１３のそれぞれに内周側に曲げられた折り曲げ部１４，１４を設けることにより、走行時の転輪からの荷重による応力集中が緩和される。
弾性履帯１は、すべてのラグ４，…，４の接地面１６，…，１６の総面積Ｌが、係合孔１５，…，１５を除く弾性履帯１を外周側から見たときの総面積Ｓの３５％以上である。弾性履帯１は、接地面１６，…，１６の総面積Ｌを、弾性履帯１の外周側から見たときの総面積Ｓの３５％以上とすることにより、接地端面の（単位面積当たりの）面圧を低下させ、トラックローダー等に装着されて芝の上を走行するときの芝の損傷を防止する。
The elastic crawler belt 1 has the surface 18 of the crawler belt body 3 at the narrowest portion between the lugs 4 and 4 adjacent in the circumferential direction as a concave curved surface, and the wing portions 13 on both sides in the width direction of the core metal 2. By providing the bent portions 14 and 14 bent to the inner peripheral side in each of the 13, the stress concentration due to the load from the rolling wheels during traveling is alleviated.
In the elastic crawler belt 1, the total area L of the ground contact surfaces 16,..., 16 of all lugs 4,..., 4 is the total area when the elastic crawler belt 1 excluding the engagement holes 15,. It is 35% or more of S. In the elastic crawler belt 1, the total area L of the ground contact surfaces 16,..., 16 is set to 35% or more of the total area S when viewed from the outer peripheral side of the elastic crawler belt 1, thereby Reduces the surface pressure and prevents damage to the turf when traveling on the turf by being mounted on a truck loader or the like.
抗張体５は、複数のスチールコード等の抗張力コードが幅方向に１列に並べられて形成されている。各抗張体５は、幅方向における係合孔１５の両側にそれぞれ芯金２の翼部１３，１３の外周側を周方向全体にわたり巻回された状態で、履帯本体３に１対が埋め込まれている。
弾性履帯１では、周方向に隣り合う芯金２，２間における抗張体５の内周側であり、かつ芯金２の折り曲げ部１４における最も内周側に位置する部分（周方向両側の端）よりも外周側である部分に、履帯本体３における他の部分、およびラグ４等を形成するゴムＲｈよりも硬度の低いゴムＲｓが使用される（図３参照）。例えば、履帯本体３における他の部分、およびラグ４等に「ＪＩＳ Ｋ ６２５３」に準拠したデュロメータによる計測値（デュロメータ硬さ）が７０〜９５度の高硬度のゴムＲｈが使用された場合、抗張体５と芯金２の折り曲げ部１４，１４との間には、デュロメータ硬さが５５〜６８度の低硬度のゴムＲｓが使用される。
The tensile body 5 is formed by arranging a plurality of tensile cords such as steel cords in a line in the width direction. Each tensile body 5 has a pair embedded in the crawler belt body 3 in a state where the outer peripheral sides of the wing portions 13 and 13 of the core metal 2 are wound around the entire circumferential direction on both sides of the engagement hole 15 in the width direction. It is.
In the elastic crawler belt 1, the innermost side of the tensile body 5 between the core bars 2 and 2 adjacent to each other in the circumferential direction and the portion located on the innermost side of the bent portion 14 of the core bar 2 (on both sides in the circumferential direction). The rubber Rs having a lower hardness than the rubber Rh forming the other parts of the crawler belt main body 3 and the lugs 4 and the like is used for the part on the outer peripheral side of the end) (see FIG. 3). For example, when a rubber Rh having a hardness value of 70 to 95 degrees using a durometer (durometer hardness) in accordance with “JIS K 6253” is used for the other part of the crawler belt body 3 and the lug 4 or the like, A rubber Rs having a low durometer hardness of 55 to 68 degrees is used between the tension member 5 and the bent portions 14 and 14 of the cored bar 2.
なお、上記した「周方向に隣り合う芯金２，２間」は、通常の意味ではなく、周方向に隣り合う芯金２，２の互いに対向する折り曲げ部１４，１４も含まれる意である。つまり、硬度の低いゴムＲｓは、周方向に隣り合う芯金２，２のそれぞれの近い側の折り曲げ部１４，１４のそれぞれの周方向両側（折り曲げ線および端縁）、および抗張体５で囲まれた部分の全部または一部に使用することができる。 The above-mentioned “between the core bars 2 and 2 adjacent to each other in the circumferential direction” does not mean a normal meaning, and includes the bent portions 14 and 14 of the core bars 2 and 2 adjacent to each other in the circumferential direction. . That is, the rubber Rs having a low hardness is formed on both sides in the circumferential direction (folding line and edge) of the bent portions 14 and 14 on the near side of the core bars 2 and 2 adjacent to each other in the circumferential direction, and on the tensile body 5. It can be used for all or part of the enclosed part.
弾性履帯１では、隣り合う芯金２，２のそれぞれ対向する折り曲げ部１４，１４の間に、途切れることなく連続して硬度の低いゴムＲｓが使用され、硬度の低いゴムＲｓが使用された部分の周方向断面形状は、略二等辺三角形である。
弾性履帯１は、隣り合う芯金２，２のそれぞれの翼部１３，１３における折り曲げ部１４，１４間に使用された、他の部分よりも硬度の低いゴムＲｓによって、弾性履帯１の衝撃吸収性（クッション効果）が向上して装着されたクローラ式走行車両の走行時の振動が
減少すると同時に、部分的に剛性を低下させて、トラックローダー等への装着が容易となっている。
In the elastic crawler belt 1, the rubber Rs having a low hardness is used continuously between the bent portions 14 and 14 of the adjacent core bars 2 and 2 facing each other, and the rubber Rs having a low hardness is used. The cross-sectional shape in the circumferential direction is a substantially isosceles triangle.
The elastic crawler belt 1 absorbs the shock of the elastic crawler belt 1 by the rubber Rs used between the bent portions 14 and 14 of the wing portions 13 and 13 of the adjacent core bars 2 and 2 and having a hardness lower than that of other portions. At the same time, vibration during traveling of the crawler type traveling vehicle mounted with improved performance (cushion effect) is reduced, and at the same time, the rigidity is partially reduced to facilitate mounting on a truck loader or the like.
図４は他の弾性履帯１Ｂを接地側（外周側）から見た図である。
弾性履帯１Ｂは、芯金２Ｂ，…，２Ｂ、履帯本体３Ｂ、ラグ４Ｂ，…，４Ｂおよび１対の抗張体等からなる。
芯金２Ｂは、金属等の硬質材料によって形成され、弾性履帯１における芯金２と同じく、全体として略長い芯金本体１１Ｂおよび１対の突起部からなる。芯金２Ｂは、長手方向の両端から中央に向けて一定の長さで板状となった翼部１３Ｂを備える。翼部１３Ｂは、弾性履帯１における芯金２と同様に、その周方向両側の端近傍の所定の幅の部分が、内周側に曲げられて折り曲げ部となっている。芯金２Ｂは、履帯本体３Ｂの幅に対する長さ（芯金２Ｂの長手方向長さ）の比が、弾性履帯１における芯金２の履帯本体３の幅に対する長さの比よりも大きい。
FIG. 4 is a view of another elastic crawler belt 1B as seen from the ground contact side (outer periphery side).
The elastic crawler belt 1B includes a core bar 2B,..., 2B, a crawler belt body 3B, lugs 4B,.
The cored bar 2B is formed of a hard material such as metal, and is composed of a substantially long cored bar body 11B and a pair of protrusions as a whole, like the cored bar 2 in the elastic crawler belt 1. The core metal 2B includes a wing portion 13B having a plate shape with a certain length from both ends in the longitudinal direction toward the center. As with the core metal 2 in the elastic crawler belt 1, the wing portion 13B is a bent portion in which portions of a predetermined width near the ends on both sides in the circumferential direction are bent toward the inner peripheral side. The ratio of the length of the metal core 2B to the width of the crawler belt body 3B (the length in the longitudinal direction of the metal core 2B) is larger than the ratio of the length of the metal core 2 to the width of the crawler belt body 3 in the elastic crawler belt 1.
芯金２Ｂは、その長手方向が後述する履帯本体３Ｂの幅方向となるようにして、履帯本体３Ｂに周方向に等間隔に埋め込まれている。
履帯本体３Ｂは、上述した履帯本体３と同様に、肉厚帯状のゴムの両端が接合されて無端帯状に形成されたものである。履帯本体３Ｂは、埋め込まれた隣り合う芯金２，２の間の幅方向中央に、内周側と外周側とを貫通する係合孔１５，…，１５を備えている。係合孔１５の役割は、弾性履帯１における係合孔１５と同じである。
The core metal 2B is embedded in the crawler belt main body 3B at equal intervals in the circumferential direction so that the longitudinal direction thereof is the width direction of the crawler belt main body 3B described later.
The crawler belt main body 3B is formed in an endless belt shape by joining both ends of a thick rubber band like the crawler belt main body 3 described above. The crawler belt main body 3B includes engagement holes 15,..., 15 penetrating the inner peripheral side and the outer peripheral side at the center in the width direction between the adjacent core bars 2 and 2 embedded. The role of the engagement hole 15 is the same as that of the engagement hole 15 in the elastic crawler belt 1.
履帯本体３Ｂの外周側には、外方に突出して係合孔１５の端縁近傍から幅方向の端まで拡がるラグ４Ｂ，…，４Ｂが、周方向に並ぶ隣り合う係合孔１５，…，１５の幅方向の一方または他方に交互に配されている。履帯本体３Ｂにおけるラグ４Ｂ，…，４Ｂも、履帯本体３におけるラグ４，…，４と同様に、周方向について千鳥状に設けられている。
ラグ４Ｂは、履帯本体３Ｂから突出する根元が形作る閉じた輪郭形状と、突出端である接地面１６Ｂの端縁（輪郭）形状とが略相似形である。なお、ラグ４Ｂというときは、履帯本体３Ｂから外周側に突出する部分全体をいうものとする。
On the outer peripheral side of the crawler belt main body 3B, lugs 4B,..., 4B that protrude outward and extend from the vicinity of the edge of the engagement hole 15 to the end in the width direction are adjacent engagement holes 15,. They are alternately arranged in one or the other of the 15 width directions. The lugs 4B,..., 4B in the crawler belt main body 3B are also provided in a staggered manner in the circumferential direction in the same manner as the lugs 4,.
In the lug 4B, the closed contour shape formed by the base projecting from the crawler belt body 3B and the end edge (contour) shape of the ground contact surface 16B which is the projecting end are substantially similar. The lug 4B refers to the entire portion protruding from the crawler belt main body 3B to the outer peripheral side.
図４を参照して、ラグ４Ｂの形状を、その根元と相似形の接地面１６Ｂの輪郭形状で説明する。
ラグ４Ｂの接地面１６Ｂの輪郭（端縁）は、周方向の一方の側（図４における上側）では、幅方向中央側（幅方向における係合孔１５の端近傍相当より僅かに幅方向端縁寄り）から幅方向端縁に向けて履帯本体３Ｂの幅半分の略４分の３の位置１８Ｂまで、周方向の他方の側に（幅方向に対して）少し傾斜して直線的に伸びている。周方向の一方の側における接地面１６Ｂの輪郭は、この伸びた端から履帯本体３Ｂの（幅方向）端縁近傍まで、幅方向に対する傾斜の程度を２段階で増して、周方向における最も他方の側に位置する部分１９Ｂに至る。
With reference to FIG. 4, the shape of lug 4B is demonstrated with the outline shape of the ground-contacting surface 16B similar to the root.
The contour (end edge) of the ground contact surface 16B of the lug 4B is slightly wider in the width direction than on the one side in the circumferential direction (upper side in FIG. 4). From the edge) to the edge in the width direction, it extends linearly with a slight inclination (relative to the width direction) to the other side in the circumferential direction, up to a position 18B that is approximately three quarters of the width of the crawler belt body 3B. ing. The contour of the ground contact surface 16B on one side in the circumferential direction increases from the extended end to the vicinity of the (width direction) edge of the crawler belt body 3B by increasing the degree of inclination with respect to the width direction in two steps, To the portion 19B located on the side of.
接地面１６Ｂの輪郭は、周方向の他方の側では、周方向における最も他方の側に位置する部分１９Ｂから幅方向中央側に向けて、かつ全体として周方向の一方の側に向けて、周方向の一方の側に対して凸状に湾曲して伸びている。接地面１６Ｂの輪郭は、幅方向中央側における周方向の一方の側の端と周方向の他方の側の端とが、周方向に延びた直線で連続している。 On the other side in the circumferential direction, the contour of the ground surface 16B is such that the portion 19B located on the other side in the circumferential direction is directed toward the center in the width direction and as a whole toward one side in the circumferential direction. It curves and extends in a convex manner with respect to one side of the direction. In the contour of the ground surface 16B, the end on one side in the circumferential direction on the central side in the width direction and the end on the other side in the circumferential direction are continuous with a straight line extending in the circumferential direction.
なお、接地面１６Ｂの輪郭における直線が連結される部分は、輪郭線が角度を有して連結されるのではなく、湾曲線を介して連結される。
このような形状を有するラグ４Ｂは、幅方向における履帯本体３Ｂの幅半分の略４分の３の位置１８Ｂで、その接地面１６Ｂの周方向の幅（周方向の一方の端から他方の端までの距離）が最も大きい。したがって、周方向に隣り合うラグ４Ｂ，４Ｂの間隔は、幅方向における履帯本体３Ｂの幅半分の略４分の３の位置１８Ｂで最も小さくなり、この位置よりも幅方向端縁側および中央側では、この位置から離れるにしたがい隣り合う４Ｂ，４Ｂの間隔が徐々に大きくなっている。
In addition, the part to which the straight line in the outline of the grounding surface 16B is connected is connected via a curved line, not the outline is connected with an angle.
The lug 4B having such a shape has a circumferential width of the ground contact surface 16B (from one end in the circumferential direction to the other end) at a position 18B that is approximately three-fourths of the half width of the crawler belt body 3B in the width direction. Distance) is the largest. Therefore, the interval between the lugs 4B and 4B adjacent in the circumferential direction is the smallest at a position 18B that is approximately three-fourths of the width half of the crawler belt body 3B in the width direction. As the distance from this position increases, the interval between the adjacent 4B and 4B gradually increases.
なお、幅方向における履帯本体３Ｂの幅半分の略４分の３の位置１８Ｂは、厳密に規定されるものではなく、図４に示されるように幅方向に一定の大きさを有する範囲である。
また、この周方向に隣り合うラグ４Ｂ，４Ｂの間隔が最も小さくなる位置は、幅方向中
央から幅方向端縁までの距離の３分の１から４分の３の範囲で任意に変更できる。
幅方向両側で千鳥状に設けられたラグ４Ｂ，…，４Ｂは、幅方向一方の側のラグ４Ｂと他方の側のラグ４Ｂとは、形状についていえば幅方向に直交する面について面対称である。
Note that the position 18B of approximately three-fourths of the half width of the crawler belt body 3B in the width direction is not strictly defined, and is a range having a certain size in the width direction as shown in FIG. .
Further, the position where the interval between the lugs 4B, 4B adjacent in the circumferential direction becomes the smallest can be arbitrarily changed within a range from one third to three quarters of the distance from the center in the width direction to the edge in the width direction.
The lugs 4B,..., 4B provided in a staggered manner on both sides in the width direction are symmetric with respect to a plane orthogonal to the width direction in terms of the shape of the lug 4B on one side and the lug 4B on the other side in the width direction. is there.
弾性履帯１Ｂは、すべてのラグ４Ｂ，…，４Ｂの接地面１６Ｂ，…，１６Ｂの総面積Ｌが、係合孔１５，…，１５を除く弾性履帯１Ｂを外周側から見たときの総面積Ｓの３５％以上である。弾性履帯１Ｂは、接地面１６Ｂ，…，１６Ｂの総面積Ｌを、弾性履帯１Ｂの外周側から見たときの総面積Ｓの３５％以上とすることにより、接地端面の面圧を低下させ、トラックローダー等に装着されて芝の上を走行するときの芝の損傷を防止することができる。 In the elastic crawler belt 1B, the total area L of the ground contact surfaces 16B,..., 16B of all lugs 4B,..., 4B is the total area when the elastic crawler belt 1B excluding the engagement holes 15,. It is 35% or more of S. The elastic crawler belt 1B reduces the surface pressure of the ground contact end face by setting the total area L of the ground contact surfaces 16B,..., 16B to 35% or more of the total area S when viewed from the outer peripheral side of the elastic crawler belt 1B. Damage to the turf when traveling on the turf by being mounted on a truck loader or the like can be prevented.
ラグ４Ｂは、周方向に並ぶ３つの芯金２Ｂ，２Ｂ，２Ｂ（のそれぞれの一部）に周方向において重なっている。
弾性履帯１Ｂにおいても、弾性履帯１と同様に、抗張体と芯金２Ｂの折り曲げ部の間に、履帯本体３Ｂにおける他の部分等を形成するゴムＲｈよりも硬度の低いゴムＲｓを使用してもよい。弾性履帯１Ｂをそのように構成することにより、弾性履帯１Ｂの衝撃吸収性が向上して装着されたクローラ式走行車両の走行時の振動を減少させると同時に、トラックローダー等への装着を容易に行うことができる。
The lug 4B overlaps in the circumferential direction with three core bars 2B, 2B, 2B (part of each) arranged in the circumferential direction.
In the elastic crawler belt 1B, similarly to the elastic crawler belt 1, a rubber Rs having a hardness lower than that of the rubber Rh forming the other portion of the crawler belt main body 3B is used between the tensile body and the bent portion of the core metal 2B. May be. By configuring the elastic crawler belt 1B in such a manner, the impact absorption of the elastic crawler belt 1B is improved to reduce vibration during traveling of the crawler type traveling vehicle, and at the same time, it can be easily attached to a truck loader or the like. It can be carried out.
弾性履帯１Ｂの各部構成は、上記した部分を除き弾性履帯１におけるものと同じである。弾性履帯１Ｂにおいて弾性履帯１におけるものと同一の構成を有する部分は、説明を省略して図４において弾性履帯１におけるものと同一の符合を付す。
図５は他の弾性履帯１Ｃを接地側（外周側）から見た図である。
弾性履帯１Ｃは、芯金２Ｂ，…，２Ｂ、履帯本体３Ｂ、大ラグ４Ｃａ，…，４Ｃａ、小ラグ４Ｃｂ，…，４Ｃｂおよび１対の抗張体等からなる。弾性履帯１Ｃにおける大ラグ４Ｃａおよび小ラグ４Ｃｂ以外の部分の構成は弾性履帯１Ｂにおけるものと同じであり、その説明を省略し、図５において図４と同じ符合を付すものとする。
The configuration of each part of the elastic crawler belt 1B is the same as that of the elastic crawler belt 1 except for the parts described above. In the elastic crawler belt 1B, portions having the same configuration as those in the elastic crawler belt 1 are omitted from description, and the same reference numerals as those in the elastic crawler belt 1 are given in FIG.
FIG. 5 is a view of another elastic crawler belt 1C as viewed from the ground contact side (outer periphery side).
The elastic crawler belt 1C includes a core metal 2B,..., 2B, a crawler belt main body 3B, large lugs 4Ca,..., 4Ca, small lugs 4Cb,. The configuration of the elastic crawler belt 1C other than the large lugs 4Ca and the small lugs 4Cb is the same as that in the elastic crawler belt 1B, and the description thereof is omitted. In FIG. 5, the same reference numerals as those in FIG.
大ラグ４Ｃａおよび小ラグは、いずれも履帯本体３Ｂの外周側から外方に塊状となって突出する。
大ラグ４Ｃａは、周方向に並ぶ係合孔１５，…，１５の幅方向の横一方の側または他方に、それぞれの側で係合孔１５，…，１５の４つの並びに１つずつ（３つの係合孔１５を挟んで）配されている。また、大ラグ４Ｃａは、係合孔１５の２つの並びに１つずつ（１つの係合孔１５を挟んで）、周方向において千鳥状となるように幅方向の一方の側および他方の側で交互に配されている。
Both the large lugs 4Ca and the small lugs project in a lump shape outward from the outer peripheral side of the crawler belt main body 3B.
The large lugs 4Ca are arranged on one side or the other side in the width direction of the engagement holes 15,..., 15 arranged in the circumferential direction, and one each of the four engagement holes 15,. With two engaging holes 15 in between. Further, the large lugs 4Ca are arranged on one side and the other side in the width direction so as to form a staggered shape in the circumferential direction by placing two engaging holes 15 one by one (with one engaging hole 15 in between). Alternatingly arranged.
大ラグ４Ｃａは、履帯本体３Ｂから突出する根元が形作る閉じた輪郭形状、および突出端である接地面１６Ｃａの端縁（輪郭）形状は、接地面１６Ｃａの形状の方が小さいが、両者は略相似形である。大ラグ４Ｃａというときは、履帯本体３Ｂから外周側に突出する部分全体をいうものとする。
大ラグ４Ｃａの接地面１６Ｃａの輪郭（端縁）は、周方向の一方の側（図５における上側）では、幅方向中央側から幅方向端縁に向けて履帯本体３Ｂの幅半分の略２分の１の位置まで、周方向の一方の側に（幅方向に対して）傾斜して直線的に伸びている。周方向の一方の側における接地面１６Ｃａの輪郭は、この伸びた端から履帯本体３Ｂの（幅方向）端縁近傍まで、周方向の他方の側に傾斜して直線的に伸びている。
The large lug 4Ca has a closed contour shape formed by the base projecting from the crawler belt body 3B and an end edge (contour) shape of the ground contact surface 16Ca which is a projecting end, but the shape of the ground contact surface 16Ca is smaller, but both are substantially It is a similar shape. When referring to the large lug 4Ca, it means the entire portion protruding from the crawler belt main body 3B to the outer peripheral side.
The outline (end edge) of the ground contact surface 16Ca of the large lug 4Ca is approximately 2 that is half the width of the crawler belt main body 3B from one side in the circumferential direction (upper side in FIG. 5) toward the end in the width direction from the center in the width direction. It extends in a straight line inclined to one side in the circumferential direction (relative to the width direction) to a position of a half. The contour of the ground contact surface 16Ca on one side in the circumferential direction extends linearly while inclining to the other side in the circumferential direction from this extended end to the vicinity of the (width direction) edge of the crawler belt body 3B.
接地面１６Ｃａの輪郭（端縁）は、履帯本体３Ｂの（幅方向）端縁近傍で端縁に沿って周方向の他方の側の輪郭に繋がる。
接地面１６Ｃａの周方向の他方の側における輪郭は、この繋がった（履帯本体３Ｂの幅方向端縁側の）端を起点として、幅方向中央側から幅方向端縁に履帯本体３Ｂの幅半分の２分の１余りの位置まで、周方向の他方の側に傾斜して直線的に伸びている。その後、接地面１６Ｃａの輪郭は、周方向の一方の側に傾斜して直線的に伸び、幅方向中央側の端で周方向に延びた輪郭線に接続され、周方向の一方の側の輪郭における幅方向中央側の端に連続している。
The contour (edge) of the ground surface 16Ca is connected to the contour on the other side in the circumferential direction along the edge in the vicinity of the (width direction) edge of the crawler belt body 3B.
The contour on the other side in the circumferential direction of the ground surface 16Ca is half the width of the crawler belt body 3B from the center in the width direction to the edge in the width direction, starting from this connected end (on the width direction edge side of the crawler belt body 3B). Inclined to the other side in the circumferential direction and extends linearly up to a half position. Thereafter, the contour of the grounding surface 16Ca is inclined linearly on one side in the circumferential direction and linearly connected to the contour line extending in the circumferential direction at the end on the center side in the width direction. It continues to the end on the center side in the width direction.
つまり、大ラグ４Ｃａは、幅方向中央側から幅方向端縁に向けて履帯本体３Ｂの幅半分
の略２分の１の位置で、周方向の一方の側に最も張り出し、幅方向中央側から幅方向端縁に履帯本体３Ｂの幅半分の２分の１余りの位置で、周方向の他方の側に最も張り出している。なお、幅方向両側の大ラグ４Ｃａ，４Ｃａは、周方向の位置がずれているものの、形状については幅方向に直交する面について面対称である。
In other words, the large lug 4Ca protrudes most on one side in the circumferential direction from the center in the width direction toward the edge in the width direction, at approximately one half of the width of the crawler belt body 3B, and from the center in the width direction. At the edge in the width direction, it protrudes most on the other side in the circumferential direction at a position that is a half of the half width of the crawler belt body 3B. The large lugs 4Ca and 4Ca on both sides in the width direction are symmetrical with respect to the plane orthogonal to the width direction, although the positions in the circumferential direction are shifted.
接地面１６Ｃａの輪郭における直線が連結される部分は、輪郭線が角度を有して連結されるのではなく、湾曲線を介して連結される。
大ラグ４Ｃａのいずれも、周方向に隣り合う２つの芯金２Ｂ，２Ｂの芯金本体１１Ｂ，１１Ｂに、その一部が周方向において重なっている。
小ラグ４Ｃｂは、常に同一形状のものが２つ周方向に並んで配される。２つの小ラグ４Ｃｂ，４Ｃｂは、幅方向の一方の側に配された大ラグ４Ｃａに対して、係合孔１５を挟んで幅方向の他方の側に配されている。つまり、１組の小ラグ４Ｃｂ，４Ｃｂは、周方向において大ラグ４Ｃａとちょうど反対の千鳥状に配されている。
The portions to which the straight lines in the outline of the ground surface 16Ca are connected are connected via a curved line, not the outline is connected with an angle.
Each of the large lugs 4Ca partially overlaps the core metal bodies 11B and 11B of the two core metals 2B and 2B adjacent in the circumferential direction in the circumferential direction.
Two small lags 4Cb are always arranged in the circumferential direction in the same shape. The two small lugs 4Cb and 4Cb are arranged on the other side in the width direction with the engagement hole 15 interposed therebetween with respect to the large lug 4Ca arranged on one side in the width direction. That is, the pair of small lugs 4Cb and 4Cb are arranged in a zigzag pattern just opposite to the large lugs 4Ca in the circumferential direction.
小ラグ４Ｃｂの接地面１６Ｃｂの輪郭（端縁）は、周方向の一方の側（図５における上側）では、幅方向中央側から幅方向端縁に向けて履帯本体３Ｂの幅半分の２分の１余りの位置まで、周方向の一方の側に傾斜して直線的に伸びている。続いて、接地面１６Ｃｂの輪郭は、この伸びた端から履帯本体３Ｂの（幅方向）端縁近傍まで、周方向の他方の側に傾斜して直線的に伸びている。 The contour (end edge) of the ground contact surface 16Cb of the small lug 4Cb is one half of the width of the crawler belt body 3B from the center in the width direction toward the end edge in the width direction on one side in the circumferential direction (upper side in FIG. 5). To one of the remaining positions, it is inclined linearly on one side in the circumferential direction. Subsequently, the contour of the ground contact surface 16Cb extends linearly from the extended end to the other side in the circumferential direction from the vicinity of the edge of the crawler belt body 3B (in the width direction).
履帯本体３Ｂの端縁近傍で、接地面１６Ｃｂの輪郭は、端縁に沿って周方向の他方の側の輪郭に繋がる。
接地面１６Ｃｂの周方向の他方の側における輪郭は、この後、周方向の他方の側に対して凸状の湾曲線となって幅方向中央側の端に至り、幅方向中央側の端で周方向に延びた輪郭線に接続され、さらに周方向の一方の側の輪郭における幅方向中央側の端に連続している。この凸状の湾曲線は、幅方向中央側から幅方向端縁に履帯本体３Ｂの幅半分の略２分の１の位置近傍が最も周方向の他方の側となるものである。
In the vicinity of the edge of the crawler belt main body 3B, the contour of the ground contact surface 16Cb is connected to the contour on the other side in the circumferential direction along the edge.
The contour of the ground surface 16Cb on the other side in the circumferential direction thereafter becomes a curved line that is convex with respect to the other side in the circumferential direction, reaches the end on the center side in the width direction, and reaches the end on the center side in the width direction. It is connected to a contour line extending in the circumferential direction, and further connected to the end on the central side in the width direction of the contour on one side in the circumferential direction. This convex curve line is the other side in the circumferential direction that is approximately the half of the width of the crawler belt main body 3B from the width direction center side to the width direction edge.
周方向に２つ並ぶ小ラグ４Ｃｂ，４Ｃｂは、その間隔が、その周方向両側で隣り合う大ラグ４Ｃａ，４Ｃａとの間隔よりも小さい。また、周方向に２つ並ぶ小ラグ４Ｃｂ，４Ｃｂの間隔、およびその周方向両側で隣り合う大ラグ４Ｃａ，４Ｃａとの間隔は、幅方向中央側から幅方向端縁に履帯本体３Ｂの幅半分の略２分の１の位置近傍が最も狭く、この位置から離れるに伴いそれぞれの間隔は広くなっている。 The interval between the two small lugs 4Cb and 4Cb arranged in the circumferential direction is smaller than the interval between the adjacent large lugs 4Ca and 4Ca on both sides in the circumferential direction. Further, the interval between the two small lugs 4Cb, 4Cb arranged in the circumferential direction and the interval between the large lugs 4Ca, 4Ca adjacent on both sides in the circumferential direction are half the width of the crawler belt main body 3B from the center in the width direction to the edge in the width direction. The vicinity of about one-half of the position is the narrowest, and the distance between the positions increases as the distance from the position is increased.
幅方向両側で千鳥状に配される２つの小ラグ４Ｃｂ，４Ｃｂは、形状については幅方向に直交する面について面対称である。
弾性履帯１Ｃのように、幅方向一方の側の大ラグ４Ｃａに対し、幅方向他方の側に周方向に細い接地面１６Ｃｂを有する小ラグ４Ｃｂ，４Ｃｂを配することで、弾性履帯１Ｃが装着されたトラックローダー等が芝上で旋回するときの旋回抵抗を軽減し、芝への連続剪断時間を断続的に変えることで芝切れの発生を減少させることができる。
The two small lugs 4Cb and 4Cb arranged in a staggered pattern on both sides in the width direction are symmetrical with respect to a plane orthogonal to the width direction.
Like the elastic crawler belt 1C, the elastic crawler belt 1C is mounted by disposing the small lugs 4Cb and 4Cb having the thin ground contact surface 16Cb in the circumferential direction on the other side in the width direction with respect to the large lug 4Ca on one side in the width direction. It is possible to reduce the turning resistance when the track loader or the like turned on the turf, and to reduce the occurrence of turf cut by intermittently changing the continuous shear time to the turf.
また、大ラグ４Ｃａは複数の芯金２Ｂ，２Ｂに跨っているため、傾斜面での横滑り抵抗成分のラグ縦（周方向）成分が長くとれ、横滑りに効果がある。また、弾性履帯１Ｃは、幅方向一方に側に大ラグ４Ｃａが形成されるので、トラクションおよびラグ耐久性に優れる。
弾性履帯１Ｃは、すべての大ラグ４Ｃａ，…，４Ｃａおよび小ラグ４Ｃｂ，…，４Ｃｂの接地面１６Ｃａ，…，１６Ｃｂ，…の総面積Ｌが、係合孔１５，…，１５を除く弾性履帯１Ｂを外周側から見たときの総面積Ｓの３５％以上となるように形成される。弾性履帯１Ｃは、接地面１６Ｃａ，…，１６Ｃｂ，…の総面積Ｌを、弾性履帯１Ｃの外周側から見たときの総面積Ｓの３５％以上とすることにより、接地端面の面圧を低下させ、トラックローダー等に装着されて芝の上を走行するときの芝の損傷を防止することができる。
Further, since the large lug 4Ca straddles the plurality of core bars 2B and 2B, the lug longitudinal (circumferential direction) component of the side slip resistance component on the inclined surface can be taken long, and the side slip is effective. Further, the elastic crawler belt 1C is excellent in traction and lug durability because the large lug 4Ca is formed on one side in the width direction.
The elastic crawler belt 1C is an elastic crawler belt in which the total area L of the ground contact surfaces 16Ca, ..., 16Cb, ... of all the large lugs 4Ca, ..., 4Ca and the small lugs 4Cb, ..., 4Cb excludes the engagement holes 15, ..., 15 It is formed to be 35% or more of the total area S when 1B is viewed from the outer peripheral side. In the elastic crawler belt 1C, the total surface area L of the ground contact surfaces 16Ca,..., 16Cb,... Is 35% or more of the total area S when viewed from the outer peripheral side of the elastic crawler belt 1C. Thus, it is possible to prevent damage to the turf when it is mounted on a truck loader or the like and travels on the turf.
幅方向両側におけるいずれの小ラグ４Ｃｂも、いずれかの芯金２Ｂの芯金本体１１Ｂとその一部が周方向において重なっている。
弾性履帯１Ｃにおいても、抗張体と芯金２Ｂの折り曲げ部の間に、履帯本体３Ｂにおける他の部分等を形成するゴムＲｈよりも硬度の低いゴムＲｓを使用してもよい。
周方向に隣り合う大ラグ４Ｃａおよび小ラグ４Ｃｂの間隔、および２つ並んだ小ラグ４
Ｃｂ，４Ｃｂの間隔が最も小さくなる位置は、幅方向中央から幅方向端縁までの距離の３分の１から４分の３の範囲で任意に設定することができる。
Any of the small lugs 4Cb on both sides in the width direction overlaps the core metal body 11B of any of the metal cores 2B in the circumferential direction.
Also in the elastic crawler belt 1C, a rubber Rs having a lower hardness than the rubber Rh that forms other portions and the like in the crawler belt main body 3B may be used between the tensile body and the bent portion of the core metal 2B.
Spacing between large lugs 4Ca and small lugs 4Cb adjacent to each other in the circumferential direction, and two small lugs 4 arranged side by side
The position where the distance between Cb and 4Cb is the smallest can be arbitrarily set in the range of one third to three quarters of the distance from the center in the width direction to the edge in the width direction.
図６は他の弾性履帯１Ｄを接地側（外周側）から見た図である。
弾性履帯１Ｄは、芯金２Ｂ，…，２Ｂ、履帯本体３Ｂ、大ラグ４Ｃａ，…，４Ｃａ、小ラグ４Ｄｂ，…，４Ｄｂおよび１対の抗張体等からなる。弾性履帯１Ｄにおける小ラグ４Ｄｂ以外の部分の構成は弾性履帯１Ｃにおけるものと同じであり、その説明を省略し、図６において図５と同じ符合を付すものとする。
FIG. 6 is a view of another elastic crawler belt 1D as seen from the grounding side (outer peripheral side).
The elastic crawler belt 1D includes a core bar 2B,..., 2B, a crawler belt body 3B, a large lug 4Ca,..., 4Ca, a small lug 4Db,. The structure of the elastic crawler belt 1D other than the small lugs 4Db is the same as that of the elastic crawler belt 1C, and the description thereof is omitted. In FIG. 6, the same reference numerals as those in FIG.
小ラグ４Ｄｂは、常に同一形状のものが２つ周方向に並んで配される。小ラグ４Ｄｂが突出する根元の形状（輪郭）および弾性履帯１Ｄにおける２つの小ラグ４Ｄｂ，４Ｄｂの配置は、弾性履帯１Ｃにおける小ラグ４Ｃｂが突出する根元の形状および２つの小ラグ４Ｃｂ，４Ｃｂの配置と同一である。
小ラグ４Ｄｂは、幅方向の略中央に周方向に延びた溝２０Ｄを備えている。小ラグ４Ｄｂの接地面１６Ｄｂは、溝２０Ｄにより幅方向に２分されている。溝２０Ｄの幅は、履帯本体３Ｂの幅半分の略６分の１である。溝２０Ｄの幅は、履帯本体３Ｂの幅半分の１０分の１から５分の１の範囲で設けることができる。なお、溝２０Ｄの幅は、２分された接地面１６Ｄｂの対向する端縁２１Ｄａ，２１Ｄｂの距離をいうものとする。
As for the small lugs 4Db, two of the same shape are always arranged side by side in the circumferential direction. The shape (contour) of the root from which the small lug 4Db protrudes and the arrangement of the two small lugs 4Db, 4Db in the elastic crawler belt 1D are the shape of the root from which the small lug 4Cb protrudes in the elastic crawler belt 1C and the two small lugs 4Cb, 4Cb. Same as arrangement.
The small lug 4Db is provided with a groove 20D extending in the circumferential direction substantially at the center in the width direction. The grounding surface 16Db of the small lug 4Db is divided into two in the width direction by the groove 20D. The width of the groove 20D is approximately one sixth of the half width of the crawler belt body 3B. The width of the groove 20D can be provided in the range of 1/10 to 1/5 of the half width of the crawler belt body 3B. The width of the groove 20D refers to the distance between the opposed edges 21Da and 21Db of the ground plane 16Db divided in half.
溝２０Ｄを設けることにより、横滑り防止効果が得られ、また、土木作業等において軟弱地等を走行するときの排土性効果によるトラクションの向上を実現することができる。
弾性履帯１Ｄにおいても、すべての大ラグ４Ｃａ，…，４Ｃａおよび小ラグ４Ｄｂ，…，４Ｄｂの接地面１６Ｃａ，…，１６Ｄｂ，…の総面積Ｌが、係合孔１５，…，１５を除く弾性履帯１Ｄを外周側から見たときの総面積Ｓの３５％以上となるように形成される。
By providing the groove 20D, a skid prevention effect can be obtained, and an improvement in traction due to a soil removal effect when traveling on soft ground or the like in civil engineering work or the like can be realized.
Also in the elastic crawler belt 1D, the total area L of the ground contact surfaces 16Ca, ..., 16Db, ... of all the large lugs 4Ca, ..., 4Ca and the small lugs 4Db, ..., 4Db is elastic except for the engagement holes 15, ..., 15 It is formed to be 35% or more of the total area S when the crawler belt 1D is viewed from the outer peripheral side.
幅方向両側におけるいずれの小ラグ４Ｄｂも、いずれかの芯金２Ｂの芯金本体１１Ｂとその一部が周方向において重なっている。
弾性履帯１Ｄにおいて、抗張体と芯金２Ｂの折り曲げ部の間に、履帯本体３Ｂにおける他の部分等を形成するゴムＲｈよりも硬度の低いゴムＲｓを使用してもよい。
弾性履帯１Ｄにおける２つ周方向に並んで配される小ラグ４Ｄｂ，４Ｄｂの１つを、弾性履帯１Ｃにおける小ラグ４Ｃｂとしてもよい。
Any of the small lugs 4Db on both sides in the width direction has the core metal body 11B of any of the metal cores 2B and a part thereof overlapping in the circumferential direction.
In the elastic crawler belt 1D, a rubber Rs having a lower hardness than the rubber Rh that forms other portions in the crawler belt main body 3B may be used between the tensile body and the bent portion of the core metal 2B.
One of the small lugs 4Db and 4Db arranged side by side in the circumferential direction in the elastic crawler belt 1D may be a small lug 4Cb in the elastic crawler belt 1C.
上述の実施形態において、弾性履帯１，１Ｂ，１Ｃ，１Ｄのいずれかが有する各部構成を、他の弾性履帯に適用することができる。例えば、弾性履帯１において、隣り合うラグ４，４の間が最も狭くなった部分における履帯本体３の表面１８を凹状となった湾曲面とする形態を、他の弾性履帯１Ｂ，１Ｃ，１Ｄにおける、周方向に隣り合うラグ間の最も狭くなった部分の履帯本体３Ｂの表面に適用することができる。 In the above-mentioned embodiment, each part structure which either of the elastic crawler belts 1, 1B, 1C, 1D has can be applied to other elastic crawler belts. For example, in the elastic crawler belt 1, the form in which the surface 18 of the crawler belt main body 3 at the narrowest portion between adjacent lugs 4 and 4 is a concave curved surface is used in the other elastic crawler belts 1B, 1C, and 1D. It can be applied to the surface of the crawler belt body 3B at the narrowest portion between the lugs adjacent in the circumferential direction.
弾性履帯１，１Ｂ，１Ｃ，１Ｄ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。 Each structure of the elastic crawler belts 1, 1B, 1C, and 1D or the overall structure, shape, dimensions, number, material, and the like can be appropriately changed in accordance with the spirit of the present invention.
本発明は、クローラ式走行車両に装着される弾性履帯に利用することができる。 The present invention can be used for an elastic crawler belt mounted on a crawler type traveling vehicle.
１，１Ｂ〜１Ｄ 弾性履帯
２，２Ｂ 芯金
３，３Ｂ 履帯本体
４，４Ｂ ラグ
４Ｃａ ラグ（大ラグ）
４Ｃｂ，４Ｄｂ ラグ（小ラグ）
５ 抗張体
１３ 翼部
１６，１６Ｂ，１６Ｃａ，１６Ｃｂ 接地面
１８ 凹状の彎曲面
Ｌ ラグの接地面の総面積
Ｓ 履帯本体を外周側から見たときの総面積
1,1B-1D Elastic crawler belt 2,2B Core metal 3,3B Crawler belt body 4,4B Lug 4Ca Rug (large lug)
4Cb, 4Db lag (small lag)
5 Tensile body 13 Wings 16, 16B, 16Ca, 16Cb Grounding surface 18 Concave saddle curved surface L Total surface area of lug grounding surface S Total area when crawler belt body is viewed from outer peripheral side
Claims (6)
前記履帯本体の周方向に間隔を有して前記履帯本体に埋め込まれた複数の芯金と、
前記履帯本体の幅方向一方の側および他方の側においてそれぞれ前記履帯本体の外周側の表面から突出する複数のラグと、で形成されており、
複数の前記ラグは、そのすべてまたはその一部が複数の前記芯金と周方向において重なるように配され、
前記幅方向の両側でそれぞれ前記周方向に隣り合う前記ラグの間隔は、前記幅方向の中央からの距離が前記履帯本体の幅寸法の半分のさらに３分の１から４分の３の位置で最も狭くなるように形成され、
前記ラグの前記外周側における端面である接地面の総面積Ｌが、前記履帯本体を前記外周側から見たときの総面積Ｓに対して３５％以上であり、
前記周方向に隣り合う前記ラグの間隔が最も狭くなる位置における前記履帯本体の表面が凹状の湾曲面である
ことを特徴とする弾性履帯。 A crawler belt body formed into an endless belt shape with rubber,
A plurality of metal cores embedded in the crawler belt main body at intervals in the circumferential direction of the crawler belt main body,
A plurality of lugs protruding from the outer peripheral surface of the crawler belt body on one side and the other side in the width direction of the crawler belt main body,
The plurality of lugs are arranged such that all or a part thereof overlaps the plurality of core bars in the circumferential direction,
The interval between the lugs adjacent to each other in the circumferential direction on both sides in the width direction is such that the distance from the center in the width direction is one third to three quarters of half the width dimension of the crawler belt body. Formed to be the narrowest,
The total area L of the ground contact surface that is the end face on the outer peripheral side of the lug is 35% or more with respect to the total area S when the crawler belt body is viewed from the outer peripheral side,
The elastic crawler belt characterized in that the surface of the crawler belt main body at a position where the interval between the lugs adjacent in the circumferential direction is the narrowest is a concave curved surface .
請求項１に記載の弾性履帯。 2. The elastic crawler belt according to claim 1, wherein the lug extends in an inclined manner toward the same one side in the circumferential direction as a whole from the center in the width direction toward the end in the width direction on both sides in the width direction .
かつ前記幅方向に並ぶ前記ラグの形状が異なる
請求項１に記載の弾性履帯。 The lugs on both sides in the width direction are each composed of two or more different shapes of lugs,
The elastic crawler belt according to claim 1, wherein the lugs arranged in the width direction are different in shape .
請求項１ないし請求項３のいずれか１項に記載の弾性履帯。 The interval between the lugs adjacent to each other in the circumferential direction gradually increases from the position where these intervals are the narrowest toward the center and the edge in the width direction, respectively. The described elastic track.
前記翼部は、前記幅方向に延びた前記周方向両側の端縁の近傍がいずれも当該端縁が前
記履帯本体の内周側となるように折り曲げられまたは湾曲されており、
折り曲げられまたは湾曲された前記周方向両側の端縁の近傍の一部または全部が、前記周方向において前記ラグと重なるように形成された
請求項１ないし請求項４のいずれか１項に記載の弾性履帯。 The cored bar is provided with plate-like wings on both ends in the longitudinal direction,
In the wing, the edges in the vicinity of both edges in the circumferential direction extending in the width direction are the front edges.
Folded or curved so that it is on the inner circumference side of the crawler belt body,
Some or all of the vicinity of the being bent or curved circumferential sides of the end edge, according to any one of the peripheral claims 1 formed so as to overlap with the lug in the direction claim 4 Elastic track.
少なくとも前記周方向に隣り合う前記芯金間における前記抗張体の前記内周側でありかつ前記芯金における最も内周側に位置する部分よりも外周側である部分の一部または全部に、その他の部分よりも低い硬度５５〜６８度のゴムが使用された
請求項１ないし請求項５のいずれか１項に記載の弾性履帯。 A pair of tensile bodies arranged on the outer peripheral side of the wing portion and embedded on both sides in the width direction;
At least a part of or all of the portion that is on the inner peripheral side of the tensile body between the core bars adjacent in the circumferential direction and that is on the outer peripheral side than the portion located on the innermost peripheral side of the core bar, The elastic crawler belt according to any one of claims 1 to 5, wherein rubber having a hardness of 55 to 68 degrees lower than other portions is used .
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| TWI776043B (en) * | 2018-05-08 | 2022-09-01 | 日商住友橡膠工業股份有限公司 | elastic track |
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| JP6162022B2 (en) * | 2013-10-28 | 2017-07-12 | 株式会社イノアックコーポレーション | Rubber pad for crawler |
| JP6499010B2 (en) | 2015-05-21 | 2019-04-10 | 株式会社ブリヂストン | Elastic crawler and elastic crawler device |
| JP6797743B2 (en) * | 2017-04-17 | 2020-12-09 | 株式会社ブリヂストン | Elastic crawler |
| JP7013436B2 (en) * | 2019-11-18 | 2022-01-31 | 鎔宰 崔 | Elastic crawler |
| US11970226B2 (en) * | 2019-11-18 | 2024-04-30 | Yong Jae Choi | Elastic crawler |
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| JPS6012787Y2 (en) * | 1981-05-28 | 1985-04-24 | 株式会社ブリヂストン | elastic track belt |
| JPS58171782U (en) * | 1982-05-13 | 1983-11-16 | 株式会社ブリヂストン | elastic track belt |
| JPH04331674A (en) * | 1991-05-07 | 1992-11-19 | Ohtsu Tire & Rubber Co Ltd :The | Endless belt for crawler |
| JP4722313B2 (en) * | 2001-04-09 | 2011-07-13 | 住友ゴム工業株式会社 | Protrusion-driven rubber crawler |
| JP2007210478A (en) * | 2006-02-09 | 2007-08-23 | Bridgestone Corp | Rubber crawler |
| JP4860450B2 (en) * | 2006-12-14 | 2012-01-25 | 住友ゴム工業株式会社 | Elastic track core and elastic track |
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