| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint structure of a rail that prevents an abnormal sound and vibrations, can withstand appropriately the load of wheels and can be laid inexpensively. SOLUTION: In a rail joint structure that makes rails (1 and 1) butt each other, spacing them by a joint gap and makes connecting hardware (2) butt the sides of butted rails (1) and connecting them by bolts (4), a clearance (S) equal to or greater than the length of thermal expansion of the rails responding to a change in ambient temperature is provided in the rail laying direction and the rails butting angle (α) in the joint gap is made to meet the following formula:α<=tan-1 (Z/S). However, the rail width direction clearance (Z) is defined by the formula: Z=(A-2r)- P/(σmax 2×R×0.000272}/1.5, where, A is the width of the rail top (mm), r is the radius of the top r portion (mm), P is the wheel load (kg),σmax is the compression strength of the rail (kg/mm2) and R is the radius of the wheel (mm).
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