JP2017065610A - Elastic crawler and elastic crawler device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elastic crawler having excellent durability and an elastic crawler device.SOLUTION: An elastic crawler 10 comprises: an endless belt-like body 2 having elasticity; plural projections 5 which project from an inner peripheral surface 2f of the body 2 and are located at intervals in a circumferential direction of the body 2; and plural auxiliary projections 6 which project from the body 2 and are lower than a height of the projection 5, and of width direction outer edges 6e are located on a width direction outer side with respect to a width direction outer edge 5e of the projection 5. The auxiliary projection 6 is located between the projections 5. An elastic crawler device comprises the elastic crawler 10.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an elastic crawler and an elastic crawler device.

  In the elastic crawler, a plurality of protrusions (center guide lugs) provided on the inner peripheral surface of the endless belt-like main body are arranged at intervals in the circumferential direction, and a plurality of engaging portions provided on the driving side are provided on the protrusions. There is one that operates by rolling a rolling wheel or the like provided on the drive side on the inner peripheral surface of the main body while sequentially engaging (see, for example, Patent Document 1).

JP-A-8-320051

  However, in general, the elastic crawler rolls on the inner peripheral surface of the main body on the outer side in the width direction of the projection, so that the slanting characteristic of the elastic crawler (a specific deviation that can occur in the elastic crawler) and the turning If the elastic crawler shifts in the width direction with respect to the rolling wheels due to a thrust load or the like, it is considered that interference occurs between the rolling wheels and the protrusions. In this case, if the elastic crawler is forcibly driven, there is a possibility that the protrusions basically made of an elastic body are worn and the durability of the elastic crawler is impaired.

  Accordingly, an object of the present invention is to provide an elastic crawler and an elastic crawler device having excellent durability.

An elastic crawler according to the present invention includes an endless belt-like main body having elasticity, a plurality of protrusions that protrude from the inner peripheral surface of the main body and are spaced from each other in the circumferential direction of the main body, A plurality of first auxiliary protrusions that protrude from the inner peripheral surface and that are lower than the height of the protrusions and that have a widthwise outer edge disposed outside the widthwise outer edge of the main body of the protrusions in the widthwise direction. And the auxiliary protrusion is disposed between the protrusions adjacent in the circumferential direction of the main body.
According to the elastic crawler according to the present invention, excellent durability can be obtained.

In the elastic crawler according to the present invention, it is preferable that the first auxiliary protrusion and the protrusion are integrally formed.
In this case, durability can be further improved.

In the elastic crawler according to the present invention, it is preferable that the first auxiliary protrusion is disposed with a gap from the first auxiliary protrusion and the protrusion adjacent in the circumferential direction of the main body.
In this case, durability can be improved while suppressing an increase in bending rigidity.

In the elastic crawler according to the present invention, the protrusion protrudes from the inner peripheral surface of the main body on the outer side in the width direction of the main body, is lower than the height of the protrusion, and is wider than the outer edge of the main body in the width direction of the protrusion It is preferable to have the 2nd auxiliary | assistant protrusion by which the width direction outer edge is arrange | positioned on the outer side.
In this case, durability can be further improved.

In the elastic crawler according to the present invention, it is preferable that the auxiliary protrusions extend so as to overlap the protrusions over the entire width direction in a cross-sectional view in the width direction.
In this case, durability can be further improved.

In the elastic crawler according to the present invention, it is preferable that the centers of the protrusions and the auxiliary protrusions coincide with each other in the width direction of the main body.
In this case, excellent durability can be obtained more reliably.

An elastic crawler device according to the present invention includes the elastic crawler described above, and a driving wheel, a driven wheel, and a roller wheel around which the elastic crawler is wound.
According to the elastic crawler device of the present invention, excellent durability can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the elastic crawler and elastic crawler apparatus excellent in durability can be provided.

It is the top view which looked at the elastic crawler concerning a 1st embodiment of the present invention from the inner skin side. It is XX sectional drawing of FIG. It is YY sectional drawing of FIG. In the elastic crawler of FIG. 1, it is sectional drawing explaining an effect | action when an elastic crawler slips sideways with respect to the wheel. In the conventional elastic crawler, it is sectional drawing explaining an effect | action when an elastic crawler slip | deviates laterally with respect to a wheel. It is the top view which looked at the elastic crawler which concerns on the 2nd Embodiment of this invention from the inner peripheral surface side. It is XX sectional drawing of FIG. It is YY sectional drawing of FIG. It is the top view which looked at the elastic crawler which concerns on the 3rd Embodiment of this invention from the inner peripheral surface side. It is XX sectional drawing of FIG. FIG. 10 is a YY sectional view of FIG. 9.

  Hereinafter, an elastic crawler according to various embodiments of the present invention will be described with reference to the drawings.

  1-3, the code | symbol 10 is an elastic crawler which concerns on the 1st Embodiment of this invention. The elastic crawler 10 has an endless belt-like crawler main body (main body) 2 having elasticity. In the present embodiment, the crawler body 2 is made of a rubber material. In the following description, the symbol W is the width direction of the crawler main body 2 (the width direction of the main body) (hereinafter also simply referred to as “width direction”). Reference numeral L denotes a circumferential direction of the crawler body 2 (a circumferential direction of the body) (hereinafter also simply referred to as “circumferential direction”). Furthermore, the symbol D is the thickness direction of the crawler body (hereinafter, also simply referred to as “thickness direction”). Here, the thickness direction is the direction of the perpendicular when the crawler body 2 is extended horizontally.

  In the present embodiment, as shown in FIGS. 2 and 3, a main cord layer 3 a is disposed on the crawler body 2. The main cord layer 3a is formed by, for example, arranging a plurality of tensile bodies (for example, steel cords) that circulate in the circumferential direction of the crawler body 2 at intervals in the width direction. The crawler body 2 can be provided with a reinforcing layer together with the main cord layer 3a. Examples of the reinforcing layer include a one-layer or two-layer 0 ° ply extending in the width direction and a two-layer bias ply extending obliquely.

  The elastic crawler 10 has a plurality of lugs 4. The lugs 4 are arranged on the outer peripheral side of the crawler main body 2 at intervals in the circumferential direction. In the present embodiment, the lug 4 is made of a rubber material.

  The elastic crawler 10 has a plurality of guide protrusions (protrusions) 5. As shown in FIG. 3, the guide protrusions 5 protrude from the inner peripheral surface 2 f of the crawler body 2 and are arranged at intervals in the circumferential direction. In the present embodiment, the rotating body R, which will be described later, is used as a friction drive wheel, and the rotating body R is rolled on the inner peripheral surface 2f of the crawler body 2 to transmit the driving force to the crawler body 2. .

The elastic crawler 10 has a plurality of auxiliary protrusions (first auxiliary protrusions) 6. As shown in FIG. 3, the auxiliary protrusions 6 protrude from the inner peripheral surface 2 f of the crawler body 2 and are disposed between the guide protrusions 5 adjacent in the circumferential direction. The height of the auxiliary protrusion 6 is lower than the height of the guide protrusion 5. In the present invention, the “height” of the guide protrusion 5 or the auxiliary protrusion 6 is from the inner peripheral surface 2f of the crawler body 2 to the position on the innermost peripheral side in the thickness direction of the guide protrusion 5 or the auxiliary protrusion 6, respectively. This is the distance in the thickness direction. In the present embodiment, as shown in FIG. 2, the height h ₅ of the guide protrusion 5 is the height from the inner peripheral surface 2 f of the crawler body 2 to the top surface of the guide protrusion 5, and the height of the auxiliary protrusion 6. h ₆ is the height from the inner peripheral surface 2 f of the crawler body 2 to the top surface of the auxiliary protrusion 6. More specifically, the height h ₆ of the auxiliary protrusion 6 is lower than the height h ₅ of the guide protrusion 5. Incidentally, h ₆ / h ₅ is preferably 0.2 to 0.5.

Further, in the elastic crawler 10, as shown in FIGS. 1 and 2, the widthwise outer edge 6 e of the auxiliary protrusion 6 is disposed outside the widthwise outer edge 5 e of the guide protrusion 5. In the present embodiment, the two widthwise outer edges 6e ₁ of the auxiliary protrusions 6 are respectively arranged on the outer sides in the width direction than the widthwise outer edges 5e of the guide protrusions 5. In the present embodiment, the auxiliary protrusion 6 extends in the width direction. Furthermore, in this embodiment, the guide protrusion 5 and the auxiliary protrusion 6 each extend in the width direction so as to overlap with the guide protrusion 5 in the cross-sectional view in the width direction, as shown in FIG.

Specifically, as shown in FIG. 2, the width W ₆ of the auxiliary protrusion 6 is made longer than the width W ₅ of the guide protrusion 5. Incidentally, W ₆ / W ₅ is preferably 10 to 30.
Specifically, the centers of the guide protrusion 5 and the auxiliary protrusion 6 are made to coincide in the width direction of the crawler body 2. More specifically, as shown in FIG. 1, a crawler body circumferential center line O _2L passing through the center of the crawler body 2 in the width direction, a guide protrusion circumferential center line O _5L passing through the width direction center of the guide protrusion ₅ , and By aligning the auxiliary projection circumferential center line O _6L passing through the center of the auxiliary projection 6 in the width direction, or as shown in FIG. 2, the crawler body thickness direction center line O _2D passing through the width center of the crawler body _2. The guide projection thickness direction center line O _5D passing through the width direction center of the guide projection ₅ and the auxiliary projection thickness direction center line O _6D passing through the width direction center of the auxiliary projection ₆ are arranged to coincide with each other. That is, as shown in FIGS. 1 and 2, by arranging the guide protrusion 5 and the auxiliary protrusion 6 so that the width direction centers thereof coincide with the center of the crawler body 2 in the width direction, the outer edge 6e of the auxiliary protrusion 6 in the width direction. widthwise outer edge of _one guide projection 5 It is arranged so as to be outside in the width direction than e.

As described above, if the centers of the guide protrusion 5 and the auxiliary protrusion 6 are aligned in the width direction of the crawler body 2, the guide protrusion 5 and the auxiliary protrusion 6 can be centered. Both the width direction outer edges 6e can be arranged at equal positions with respect to the width direction outer edge 5e of the guide protrusion 5. In particular, in this embodiment, the width W ₆ of the auxiliary protrusion 6 is longer than the width W ₅ of the guide protrusion 5, and the guide protrusion 5 and the auxiliary protrusion 6 are centered in the width direction of the crawler body 2. Since the guide protrusion 5 and the auxiliary protrusion 6 are arranged on the inner peripheral surface 2f of the crawler body 2 so as to match the width direction center, the width direction outer edge 6e of the auxiliary protrusion 6 is changed to the width direction outer edge of the guide protrusion 5. Along with 5e, the crawler body 2 can be arranged at an equal position with respect to the center in the width direction.

  Next, the operation of the elastic crawler 10 according to this embodiment will be described.

In FIG. 4, reference numeral R denotes a driving-side rotating body that rolls on the inner peripheral surface 2 f of the crawler body 2 of the elastic crawler 10. In the present embodiment, the rotating body R is composed of a metal iron ring part R ₁ constituting the main body of the rotating body R, and a rubber lining part R ₂ provided in an annular shape on the outer peripheral surface of the iron ring part R _1. Yes. In this case, it is preferable that the thickness h _r of the rubber lining portion R ₂ is substantially equal to the height h ₆ of the auxiliary protrusion 6. In this embodiment, since the rotating body R is a friction type driving wheel as described above, the rotating body R is a driving wheel, a driven wheel, and a wheel, but the driving wheel on the driving side has a plurality of pin members around the rotation axis of the sprocket. In the case of a sprocket in which (engaging portion) is arranged, the rotating body R is a wheel or a driven wheel.

  In the elastic crawler 10 according to the present embodiment, the height of the auxiliary protrusion 6 is lower than that of the guide protrusion 5, and the width direction outer edge 6 e of the auxiliary protrusion 6 is disposed outside the width direction outer edge 5 e of the guide protrusion 5. Therefore, even if the crawler main body 2 is laterally displaced in the width direction with respect to the rotating body R, the rotating body R comes into contact with the width direction outer edge 5e of the guide protrusion 5 by contacting with the width direction outer edge 6e of the auxiliary protrusion 6. Do not touch or contact is suppressed. For this reason, according to the elastic crawler 10 according to the present embodiment, it is possible to prevent or suppress the wear of the guide protrusion 5 caused by the rotating body R interfering with the guide protrusion 5. Therefore, according to the elastic crawler 10 according to the present embodiment, excellent durability can be obtained. Further, in the elastic crawler 10 according to the present embodiment, the auxiliary protrusion 6 extends so as to overlap the guide protrusion 5 over the entire width direction in a cross-sectional view in the width direction, so that the durability is further improved. Can do.

  In addition, in the elastic crawler 10 according to the present embodiment, the auxiliary protrusion 6 is disposed with a gap from the auxiliary protrusion 6 and the guide protrusion 5 adjacent in the circumferential direction. In this case, the crawler body 2 can be easily bent by forming a gap extending in the width direction between the guide protrusion 5 and the auxiliary protrusion 6. For this reason, according to the elastic crawler 10 which concerns on this embodiment, durability can be improved, suppressing the increase in bending rigidity.

  In the elastic crawler 10 according to the present embodiment, the centers of the guide protrusion 5 and the auxiliary protrusion 6 coincide with each other in the width direction of the crawler body 2. In this case, since the guide protrusion 5 and the auxiliary protrusion 6 can be centered, the elastic crawler 10 can be prevented from laterally shifting in the width direction with respect to the rotating body R, so that excellent durability can be obtained more reliably.

In the present embodiment, the auxiliary protrusion 6 has two corner edges 6e ₂ connected in the circumferential direction to the widthwise outer edge 6e ₁ of the auxiliary protrusion 6 in a plan view of FIG. Each corner edge 6e ₂ is curved outward in the width direction toward the outer side in the width direction as it approaches the outer edge 6e ₁ in the width direction from the circumferential end edge of the auxiliary protrusion 6 extending in the width direction. In this case, even when the rotating body R is in contact with the oblique from circumferentially around the width direction outer edge 6e ₁ of auxiliary protrusions 6, by releasing the rotating body R along the corner edge 6e ₂ outward in the width direction, the guide protrusion The durability of 5 can be further improved.

  On the other hand, as shown in FIG. 5, the conventional elastic crawler interferes with the guide protrusion 5 when laterally displaced with respect to the rotating body R. Such interference may cause wear on the guide protrusion 5 when the elastic crawler is forcibly driven.

  Next, in FIGS. 6 to 8, reference numeral 20 denotes an elastic crawler according to the second embodiment of the present invention. In the following description, components substantially the same as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the elastic crawler 20 according to the present embodiment, each of the auxiliary protrusions 6 is connected to the guide protrusion 5 adjacent to the auxiliary protrusion 6 in the circumferential direction. Specifically, as shown in FIGS. 6 and 8, it is integrally formed on the inner peripheral surface 2 f of the crawler main body 2 so as to fill a space between the auxiliary protrusion 6 and the guide protrusion 5 adjacent in the circumferential direction. Thereby, the width direction outer edge 6e ₁ of the auxiliary protrusion 6 is locally arranged on the outer side in the width direction than the width direction outer edge 5e of the guide protrusion 5 as shown in FIGS.

Also in the elastic crawler 20 according to the present embodiment, the height of the auxiliary protrusion 6 is lower than that of the guide protrusion 5, and the width direction outer edge 6 e ₁ of the auxiliary protrusion 6 is outward in the width direction from the width direction outer edge 5 e of the guide protrusion 5. Therefore, even if the crawler body 2 is laterally displaced in the width direction with respect to the rotating body R, the rotating body R comes into contact with the outer edge 6e ₁ of the auxiliary protrusion 6 in the width direction. No contact with 5e or contact is suppressed. For this reason, according to the elastic crawler 20 according to the present embodiment, it is possible to prevent or suppress the wear of the guide protrusion 5 caused by the rotating body R interfering with the guide protrusion 5. Therefore, according to the elastic crawler 20 according to the present embodiment, it is possible to prevent the guide protrusions 5 from being worn early, chipped, and torn, and to obtain excellent durability. Further, even in the elastic crawler 20 according to the present embodiment, the auxiliary protrusion 6 extends so as to overlap the guide protrusion 5 over the entire width direction in a cross-sectional view in the width direction, so that the durability is further improved. Can do.

  In addition, in the elastic crawler 20 according to the present embodiment, the auxiliary projection 6 is connected to the guide projection 5 adjacent to the auxiliary projection 6 in the circumferential direction. In this case, by connecting the guide protrusion 5 and the auxiliary protrusion 6 and improving the strength of the auxiliary protrusion 6, early wear, chipping and tearing of the guide protrusion 5 can be further prevented, and durability can be further improved. Can do. Further, even when the crawler body 2 is obliquely displaced laterally with respect to the rotating body R, the rotating body R comes into contact with the outer edge 6e of the auxiliary protrusion 6 in the width direction, so that the width direction of the guide protrusion 5 can be ensured. No contact with the outer edge 5e or contact is suppressed. For this reason, according to the elastic crawler 30 according to the present embodiment, it is possible to more reliably prevent or suppress the wear of the guide protrusion 5 caused by the rotating body R interfering with the guide protrusion 5. In the elastic crawler 20 according to the present embodiment, as shown in FIG. 6, the corner edge is not formed on the circumferential side of the guide protrusion 5 in a plan view, thereby further reducing the possibility of interference with the guide protrusion 5. be able to.

In particular, in the elastic crawler 20 according to the present embodiment, the auxiliary protrusion 6 has two circumferential corner angles that are connected in the circumferential direction to the widthwise outer edge 6e ₁ of the auxiliary protrusion 6 along the circumferential direction in the plan view of FIG. It has an edge 6e _2. Each of the circumferential corner edges 6e ₂ is inclined outward in the width direction between the width direction outer edge 5e of the guide protrusion 5 and the width direction outer edge 6e ₁ of the auxiliary protrusion 6. In this case, even when the rotating body R is obliquely contacted in the circumferential direction near the widthwise outer edge 6e ₁ of the auxiliary protrusion 6, the rotating body R is allowed to escape outward in the width direction along the circumferential corner edge 6e ₂ . The durability of the guide protrusion 5 can be further improved.

  Further, in FIGS. 9 to 11, reference numeral 30 denotes an elastic crawler according to the third embodiment of the present invention. In the following description, components substantially the same as those of the other embodiments are denoted by the same reference numerals and description thereof is omitted.

  The elastic crawler 30 according to the present embodiment is a modification of the elastic crawler 20 according to the second embodiment. In the elastic crawler 30 according to the present embodiment, the guide protrusion 5 protrudes from the inner peripheral surface 2f of the guide protrusion 5 in the width direction, is lower than the height of the guide protrusion 5, and the outer edge of the guide protrusion 5 in the width direction. An auxiliary protrusion 6 (second auxiliary protrusion) is disposed on the outer side in the width direction than 5e. In the present embodiment, each of the auxiliary protrusions 6 is generally connected to the periphery of the guide protrusion 5 within a range including the guide protrusion 5. Specifically, as shown in FIGS. 9 to 11, the auxiliary protrusion 6 is integrally formed on the inner peripheral surface 2 f of the crawler body 2 so as to have the auxiliary protrusion 6 on the outer side in the width direction of the guide protrusion 5. ing. Thereby, the width direction outer edge 6e of the auxiliary | assistant protrusion 6 is arrange | positioned at the whole circumferential direction of the crawler main body 2, as shown in FIG.9 and FIG.10.

  Also in the elastic crawler 30 according to the present embodiment, the height of the auxiliary protrusion 6 is lower than that of the guide protrusion 5, and the width direction outer edge 6 e of the auxiliary protrusion 6 is disposed on the outer side in the width direction than the width direction outer edge 5 e of the guide protrusion 5. Therefore, even if the crawler main body 2 is obliquely displaced laterally with respect to the rotating body R in the width direction, the rotating body R comes into contact with the outer edge 6e in the width direction of the auxiliary protrusion 6, thereby No contact with 5e or contact is suppressed. For this reason, according to the elastic crawler 30 according to the present embodiment, it is possible to prevent or suppress the wear of the guide protrusion 5 caused by the rotating body R interfering with the guide protrusion 5. Therefore, according to the elastic crawler 30 according to the present embodiment, the guide protrusion 5 can be prevented from early wear, chipping, and tearing, and excellent durability can be obtained. Further, even in the elastic crawler 30 according to the present embodiment, the auxiliary protrusion 6 extends so as to overlap the guide protrusion 5 over the entire width direction in a cross-sectional view in the width direction, thereby further improving durability. Can do.

  In addition, in the elastic crawler 30 according to the present embodiment, the guide protrusion 5 protrudes from the inner peripheral surface 2f of the guide protrusion 5 to the outside in the width direction, is lower than the height of the guide protrusion 5, and The widthwise outer edge 6e is disposed outside the widthwise outer edge 5e, the widthwise outer edge 6e is disposed on the widthwise outer edge 6e, and the widthwise outer edge 6e of the auxiliary protrusion 6 disposed between the guide protrusions 5 is aligned in the widthwise direction. ing. In this case, as shown in FIG. 9, the entire width direction outer edge 5 e of the guide protrusion 5 is disposed on the inner side in the width direction than the width direction outer edge 6 e of the auxiliary protrusion 6. Even when laterally shifted in the width direction, the rotating body R is most reliably not in contact with the width direction outer edge 5e of the guide protrusion 5 or is prevented from being contacted by contacting the width direction outer edge 6e of the auxiliary protrusion 6. The For this reason, according to the elastic crawler 30 according to the present embodiment, it is possible to most reliably prevent or suppress the wear of the guide protrusion 5 caused by the rotating body R interfering with the guide protrusion 5. For this reason, in the elastic crawler 30 which concerns on this embodiment, durability can be improved most. The other auxiliary projections 6 can be arranged separately from the guide projections 5 and on the outer side in the width direction without being provided integrally with the guide projections 5 as in this embodiment.

The elastic crawler device according to the present invention includes the elastic crawler according to the present invention.
For example, an elastic crawler device according to an embodiment of the present invention includes any one of the elastic crawlers 10 to 30 described above. Specifically, the elastic crawler device according to the present embodiment includes at least one of the elastic crawlers 10 to 30 and the rotating body R. According to the elastic crawler device of this embodiment, excellent durability can be obtained.

  Thus, according to the present invention, an elastic crawler and an elastic crawler device excellent in durability can be provided.

  The above description discloses only some embodiments of the present invention, and various modifications can be made according to the claims. For example, in each of the above-described embodiments, the elastic crawler according to the present invention has been described as an elastic crawler having no cored bar, but the present invention can be applied to an elastic crawler having a cored bar.

  The present invention includes an elastic crawler and an elastic crawler having an endless belt-like main body having elasticity, and a plurality of protrusions that protrude from the inner peripheral surface of the main body and are spaced from each other in the circumferential direction of the main body. Can be used in the device.

2; crawler body (main body), 2f; inner peripheral surface of crawler body, 3a, 3b; main cord layer, 4; lug, 5; guide protrusion (protrusion), 5e; outer edge in the width direction of guide protrusion, 6; , 6e; widthwise outer edge of the auxiliary protrusion, 6e ₁ ; widthwise outer edge of the auxiliary protrusion, 6e ₂ ; circumferential corner edge of the auxiliary protrusion, 10; elastic crawler (first embodiment), 20; elastic crawler (first) 2), 30; elastic crawler (third embodiment), O _2L ; circumferential crawler body central axis, O _5L ; guide projection circumferential center line, O _6L ; auxiliary projection circumferential center line, O _2D Crawler body thickness direction center line, O _5D ; guide projection thickness direction center line, O _6D ; auxiliary projection thickness direction center line, h ₅ ; guide projection height, h ₆ ; auxiliary projection height, W ₅ ; Guide projection width direction length, W ₆ ; Auxiliary protrusion width direction Direction length, R: Rotating body, D: Crawler body thickness direction (main body thickness direction), L: Crawler body circumferential direction (main body circumferential direction), W: Crawler body width direction (main body width direction)

Claims (7)

An endless belt-like body having elasticity;
A plurality of protrusions that protrude from the inner peripheral surface of the main body and are arranged at intervals in the circumferential direction of the main body,
A plurality of first auxiliary protrusions protruding from the inner peripheral surface of the main body and having a widthwise outer edge that is lower than the height of the protrusion and outside the widthwise outer edge of the main body in the protrusion. When,
With
The elastic crawler, wherein the first auxiliary protrusions are disposed between the protrusions adjacent in the circumferential direction of the main body.   The elastic crawler according to claim 1, wherein the first auxiliary protrusion and the protrusion are integrally formed.   2. The elastic crawler according to claim 1, wherein the first auxiliary protrusion is disposed at a distance from the first auxiliary protrusion and the protrusion adjacent in the circumferential direction of the main body.   4. The outer edge of the main body in the width direction according to claim 1, wherein the protrusion protrudes from the inner peripheral surface of the main body to the outer side in the width direction of the main body, and is lower than the height of the main protrusion. The elastic crawler which has a 2nd auxiliary projection by which a width direction outer edge is arranged on the width direction outside rather than.   5. The elastic crawler according to claim 1, wherein the auxiliary protrusion extends so as to overlap the protrusion and the entire width direction in a cross-sectional view in the width direction.   The elastic crawler according to claim 1, wherein the centers of the protrusions and the auxiliary protrusions coincide with each other in the width direction of the main body.   An elastic crawler device comprising: the elastic crawler according to any one of claims 1 to 6; and a driving wheel, a driven wheel, and a wheel on which the elastic crawler is wound.

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