| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap closing a spot facing portion of a mounting hole formed on a guide rail and capable of maintaining fixing force to the spot facing portion over a long period.SOLUTION: A cap 5 includes a first member 51 and a second member 52 to be used by being superposed on each other. The first member 51 includes six recessed portions 51a formed at equal intervals on an outer peripheral surface of a disc and a hole portion 51b. The second member 52 includes six projecting portions 52a formed at equal intervals at an outer edge portion of the disc and a shaft portion 52b. In the cap 5, a shaft portion 52b of the second member 52 is passed through the hole portion 51b of the first member 51, and the projecting portions 52a of the second member 52 are fitted to recessed portions 51a of the first member 51. The projecting portions 52a are elastically deformed in a spot facing portion 41 to fix the cap 5 to the spot facing portion 41. |
