| 摘要 |
An improved hydraulic lifting sectional security door, capable of being installed at an entry space to a room, comprising a pair of profiles (PRF) near to each frame (STP) of the entry space, a series of panels (PNL) articulated together and a device or group (GP) for lifting the panels (PNL), which includes a hydraulic cylinder (CI), to which fixed and mobile lifting pulleys (PL 1 , PL 2 , PL 3 , PL 4 ) are fixed; according to the invention the lifting cables (FA 1 , FA 2 ) start from stops (FE 1 , FE 2 ), which are preferably next to the cylinder (CI) and their exit in the direction of the return pulleys (PU 1 , PU 2 ) takes place in a balanced manner, on the two outer sides of the lifting pulleys (PL 1 , PL 2 , PL 3 , PL 4 ), so as to be able to obtain a reversible container (CAS), which allows the hydraulic cylinder (CI) and the exit of the hydraulic tube (TU) to the right or left of the entry space, according to the user's desires and requirements.
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