| 摘要 |
PURPOSE:To prevent a belt-like main body from being bent at the middle part thereof so as to avoid disengagement of wheels by embedding bottom reinforcements which intersect each other in the longitudinal direction of the belt, inside the belt-like main body. CONSTITUTION:The part of a resilient material in the vicinity of the opposed end parts of reinforcements 3 and 4 which run in two rows is formed as a thickened part 12 which has a larger thickness than the part of a resilient material in the vicinity of the respective external ends of the reinforcements 3 and 4. Most of the thickened part 12 is formed to gain height on the side of the internal face opposite to the grounded face. Additionally, bottom reinforcements 14 which intersect each other are embedded inside a belt-like main body 2 in the longitudinal direction of the belt. On account of the formation of the thickened part 12, namely, the part made of resilient material in the vicinity of the opposed end parts of reinforcements 3 and 4, with a thickness larger than that of the part of a resilient material in the vicinity of the respective external ends of the reinforcements 3 and 4, an endless belt 1, if travelling on any road surface with steps, may be restrained from being bent from the middle part to prevent wheels from coming off. |
