| 摘要 |
PROBLEM TO BE SOLVED: To provide a guide gutter of a ball lifter enabling ease of fabrication, reduction of installation area and ease of mounting operation. SOLUTION: Right and left inflow gutters 21 and 22 and an outflow gutter 23 are formed separately from one another and are attached respectively to right and left recovery gutters and the ball lifter to constitute the guide gutter 20. Thus, even if a long distance cannot be secured between the downstream ends of the right and left recovery gutters, the work of mounting the guide gutter 20 in place can be facilitated. Also, a partition wall 29a is provided on the bottom wall of the outflow gutter 23 so that used balls flowing out are caused to roll in alignment with one another.
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