| 摘要 |
<p>PURPOSE:To wind a hose on a yet smaller drum as keeping the extent of good directional controllability at the time of driving in the underground, without taking much time and labor. CONSTITUTION:A lot of driving tubes T are connected with one another free of flection via a connecting part B, a connecting hose H is installed in a driving head being attached to such one at the tip side out of these driving tubes T. A part or all driving tubes T in a pusher body is halved in the longitudinal direction, and both divided tubes 5, 6 themselves are formed free of connection or separation, while length of the hose H is set so as to make both these divided tubes 5, 6 relatively bendable in the separated state. Then, such a diametral expanding part 4 as housing the hose H in the connected state after being loosened is formed in a part or all driving tubes among lots of driving tubes T.</p> |
