TIRE DRIVE TYPE CRAWLER BELT DEVICE

PURPOSE:To prevent tires from being off by forming the sections extending from treads to side walls of tire shoulder sections into straightly tapered surfaces and forming the inside of the side guide of a crawler belt into a tapered surface corresponding to the tapered shoulder sections and by restricting the rising of the tires to the side guide sections. CONSTITUTION:The shoulder sections extending from the tread sections 51 of rear wheel tires 14 and freely rotatable wheel tires 16 toward right and side wall sections 52 and 52 are formed on straightly tapered surfaces 53 and 53. The inside sections, tapered surfaces 54 and 54, of the girders 19 and 19 of both side guide sections of the tread section 18 of a crawler belt 17 are also made to correspond to the surfaces 53 and 53. In the next step, when they receive side force in turning or get over a gap such as the edge of a pavement, relative horizontal displacement is produced between the belt 17 and tires 14 and 16, and the surfaces 53 are guided downward contacting with the surfaces 54 due to the turning, as a result, the tires 14 and 16 are contained between the girders 19 and 19 of both sides of the belt 17. Therefore, the tires 14 and 16 are prevented from being off from the belt 17.