| 摘要 |
PURPOSE:To improve lifting capacity and resistance to wear, by a method wherein a pair of roll-in rollers on both sides are mounted to a device body which is located so that a longitudinal angle is adjustable, and the rollers are formed in the blending shape of a cylindrical and a spherical shape. CONSTITUTION:A lifting device for fish net 14, rope 15, etc. has a device body 2 comprising a gear box 5 and an angle regulating means 6, and roll-in rollers 3 are respectively mounted to a pair of rotary shafts on both sides projected from the under surface of the gear box 5. The roll-in roller 3 is structured such that tapered curved parts 36 are integrally formed above and below an about cylindrical central peripheral contact part 35, and air can be injected in the interior thereof. A pair of fixed arms 40 on both sides are located in a forward-extented condition the device body 2, moving arms 41 extended obliquely are respectively mounted to the front parts of the two arms 40, and the opposite ends of a guide roller 4 are pivotally secured between the two moving arms 41. |
