| 摘要 |
PROBLEM TO BE SOLVED: To improve workability of an opening/closing mechanism. SOLUTION: In an opening/closing lock device 31 which has a plurality of frames and performs locking and unlocking by using an engagement craw 32 when the frames are opened and closed, an upper frame 10a having a craw 33 and an engagement hole 35 for engaging the craw 33 is provided and a second frame having a protrusion 36 for releasing engagement of the craw 33 and the engagement hole 35 is provided. When the upper frame 10a and a lower frame 10b are separated, the unlocking position of the engagement craw 32 is maintained by the engagement of the craw 33 and the engagement hole 35. When the upper frame 10a and the lower frame 10b are in contact with each other, the engagement is released by making contact between the craw 33 and the protrusion 36, and the engagement craw 32 is moved to a locking position.
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