Abstract: The present invention relates to a crawler without steel cores (hereinafter referred to as “coreless crawler”), which is used for transporting the caterpillar vehicles for construction, civil engineering, agricultural use or the like. More particularly this invention relates to a coreless crawler for preventing the crawler body from being separated from a wheel or sprocket and the guide roller from riding the guide projection formed on the inward surface of the crawler, by disposing a pair of separation preventing steel cords having an oblique angle, symmetrically with respect to the center portion in the direction of driving so as to balance the deflection forces, thereby extending the lifetime of the crawler product.

Abstract: The present invention provides an elastic crawler having an improved flexing properties in which arrangement of lugs are improved so as to prevent deterioration of the flexing properties due to rigidity of a crawler body increased by providing lugs. The crawler includes a crawler body 2, a plurality of core members 3 having right and left wings 3R, 3L, respectively, and provided in the crawler body laterally with respect to the crawler and in parallel to each other with a space therebetween in the longitudinal direction of the crawler, and a plurality of right and left lugs including small lugs provided correspondingly to one of the wings 3R or 3L and large lugs provided correspondingly to two of the wings 3R or 3L adjacent to each other in the longitudinal direction of the crawler.