| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to keep the binding state rigidly when a heavy load is given. SOLUTION: Mounting a hit ball supply tray 20 on a front face door board 5, as a fixing bolt 70, which is placed on the left side of hit ball supply tray 20 seen head-on, is put into a bolt hole 109 set on the front face door board 5 and is fixed from the back face of front face door board 5 with the nut 71, and a mounting part 72 that is including a mounting penetrate boss 69 is fixed from the back face of the front face door board 5 with the screw according to the mounting hole 106 set on the front face door board 5, and as it is constructed including the fixing means, at least the fixing bolt 70 and the nut 71, compare to the one that is fixed with only a thread, the binding strength is improved substantially, without loosening of the hit ball supply tray 20 when heavy load is given repeatedly and the supplying the hit ball to the hitting position with the hit ball supply tray 20 is done smoothly.
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