| 摘要 |
PURPOSE: A manual-type elongated hole-boring machine is provided to make the work conditions excellent through simplification of structure and to reduce the cost. CONSTITUTION: A manual-type elongated hole-boring machine bores an elongated hole by rotating a boring drill(134) connected to a transmitting rod(132) through a rotating pump(130) while moving a guide rail(105) via a moving pump(100). A valve body(110), adjusting the advance and retreat by making compressed air come in and out the moving pump, is formed to the rear of the moving pump. An adjusting bush adjusting the direction of the compressed air is rotatably formed to the inside of the valve body. An adjusting lever is combined to one end of the adjusting bush to enable adjustment by rotation. A compressed air inlet is formed to a side of the valve body to supply compressed air. An advancing pneumatic hole is formed along an advancing passage and is connected to an advancing pneumatic pipe of the moving pump to supply the compressed air via a compressed air input port and an input hole of the adjusting bush.
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