Hand-cranked film hoist for the various types of agricultural plastic assembly shed, open duck shed, breeding shed wet curtain wall. Coupled with a 20mm internal diameter galvanized pipe, installed properly, used properly, shed length over 100 meters, one-person operation, can be quickly throughout the greenhouse side of the film rolled up or down to 1-2 m. The winch hand-cranked film structure in Figure 1, one end of the spine axle mounted roll handle, connect the opposite end of the volume membrane pole. Shake the handle will be able to drive the volume membrane rod rotation. Membrane pole of the film volume solid volume, so when the shaking volume membrane pole, they put a film around the enclosure volume in the volume membrane pole. As the film is rolled up, the film hoist will move along the rod up. When rolled up to the open position, stop, shake the handle, ratchet pawl stuck, stop its reversal and stay there.

Duck greenhouse film hoist work video address 1:

 http://v.youku.com/v_show/id_XMzk2MDc4NDE2.html?f=17528840

Duck greenhouse film hoist work video address 2: