| 摘要 |
<p>PURPOSE: To enable the downward extension of travel of an elevator for construction in response to the progress of the underground construction. CONSTITUTION: Before performing the excavation, a support 1 is placed in the ground G to the depth, which exceeds the excavation depth Bn at the time of conclusion of the excavation, and thereafter, when the ground G is excavated to the B1 level, a post 2 is fixed to the support 1 to the depth exposed by the excavation, and supported by an upper post receiver 7 and a post receiver base 8, and a loading bed 4 integrally having a loading bed driving device 5 is fitted to the post 2, and a platform 11 is built in the ground at the stop position of the loading bed 4. When the ground G is excavated to the B2 level, a new post 2 is fitted so as to be continued to the existing post, and the lower end thereof is supported by the post receiver base 8 moved downward, and the travel of the loading bed 4 is thereby extended downward along the post 2.</p> |
