| 摘要 |
PURPOSE:To automatically drill holes by moving a drilling device back and forth by means of a moving mechanism provided to the lower part of an elevator connected to a tractor. CONSTITUTION:Guide rollers 31 are attached in two stages vertically on both left- and right-handed sides of the machine frame 2 connected to a tractor 1 by a connecting mechanism 8, and two elevators 3 are supported on both sides of the guide rollers 31 in such a way as to enable them to vertically move through the power-fetching shaft 16, etc. of the tractor 1. The guide roller 40 of a moving plate 39 is fitted into the guide plate 38 on the downside of the elevator 3 in a back and forth movable manner, and a drill device 4 is hung down from the left and right ends of a fitting connector plate 41 on the downside of the plate 39 to make up a moving mechanism 7. By the moving mechanism 7, the tractor is advanced while the drill device 4 is put into farm land and stopped, the drill 4 is pulled out and returned by a spring 43, etc., and holes are drilled. Vertical holes (not illustrated) can thus be drilled one spot at a time in a nursery of hard ground. |
