| 摘要 |
<p>Tunnel or mine roadway tubbings erector comprises a head member which travels radially on the erector ring way and can be moved radially by hoist. The head member (13) is mounted centrally on a yoke assembly (16) hinged both sides to rack or threaded spindles which can be driven in enforced synchronism through a shared shaft (30). The rack or spindles should each form a guide rod travelling in a guide (22, 23) provided within the erector ring unit (10). The joints (19, 20) between yoke and spindles should be mutually spaced by one outside diameter of the erector ring way (10), one joint forming a slot and bolt connection with the rigidly constructed yoke.</p> |
