| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a structure of a screw spike for a crosstie, which enables completion of work in a period of scheduled work time by shortening a work time per screw spike, required for the work for fastening/loosening the screw spike for the crosstie.SOLUTION: In a structure of a screw spike 1 for a crosstie, a double-thread screw 4 is formed on an outer peripheral surface, and preferably, a pitch between the double-thread screws 4 is set to be about 24 mm. Thus, work for being fastened to/loosened from the crosstie is reduced.</p> |
