| 摘要 |
The present invention relates to a hoist crane having a movable bucket, which draws a vehicle in and out to carry the soil excavated underground during subway construction or underground construction or to draw the vehicle into the underground, and, more specifically, to a hoist crane having a movable bucket, which controls the width and the height thereof. The present invention comprises a pair of hydraulic cylinders which have a rod coupled to the top end of an upper support and a rod coupled to the bottom end of a lower support between the upper and lower supports of each support for supporting the hoist crane. Thus, a piston is moved forward and backward by pumping hydraulic pressure into the upper and lower hydraulic cylinders, thereby controlling the height of the upper and lower supports. |
