| 摘要 |
PROBLEM TO BE SOLVED: To provide a boom detachment apparatus enabling to change in boom height and detachment of a boom to easily be carried out without using an industrial tool. SOLUTION: Knobs 49A, 49B are pulled inside while resisting the elastic force of springs 47A and 47B. Boom attachments 37A and 37B are mounted on a pipe 31A while maintaining the above state in such a way that the pipe 31A is fitted in concave parts 39A and 39B formed on the bottom of the attachments 37A and 37B. After that, upper part of the attachments 37A and 37B are shaken backward and forward in a state where the knobs are released. During that movement, each hole 35A is pierced by one end of each of locking pins 43A and 43B when the directions of through holes 41A and 41B match up to the direction of the hole 35A.
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