| 摘要 |
PROBLEM TO BE SOLVED: To improve workability in maintenance and the like.SOLUTION: A case 12 is formed with a holding portion 40 which holds a cap 13 in an opening state between an opening edge 121 of the case 12 and an engaging portion 20, when the cap 13 is opened while engagement between the engaging portion 20 and an engaging protrusion 30 is kept. In this structure, when the cap is opened while the engagement between the engaging portion and the engaging protrusion is kept, the cap can be held in the opening state by the holding portion. Therefore, dropping of the cap by self-weight can be suppressed. |
