摘要:
The invention relates to a ladder arrangement, a person lifter and a method of using a person lifter provided with ladders. The ladders comprise a movable ladder part (8) and a fixed ladder part (9), and an actuator (11) for placing the movable ladder part relative to the fixed ladder part in such a manner that the steps (8a, 9a) of the ladder parts are substantially at the same point. When the steps are being placed at the same point with each other, the beam (2) is substantially immobile.
摘要:
The invention relates to a method for fire-fighting, and to a rescue boom and a nozzle of a piercing tool. A rescue boom (3) is provided with an elongated piercing tool (7) that can be pushed through a shell (8) of a burning object. A fire extinguishing medium can be conveyed through the piercing tool to a nozzle (12) provided in the piercing tool. The nozzle is provided with orifices (17) arranged such that single jets (20) form a single uniform jet (13) having a flat curtain-like shape.
摘要:
The invention relates to a method for locking an operating position of a boom, to a personnel hoist and a lift cylinder for a boom. The boom (3) may be raised up to an operating position (A) by the lift cylinder (8). The movement between a piston rod (13) of the lift cylinder (8) and the cylinder body (14) may be locked at least in the return direction by means of a locking device (17). The locking device comprises a first locking member (10) moving together with the piston and a second locking member (15) coupled to the cylinder body.In the locking position of the locking device the relative longitudinal movement between the locking members is prevented mechanically, which allows the boom to be locked to its operating position.
摘要:
The invention relates to a method of measuring bending of a personnel hoist boom, a personnel hoist, and a measurement system. The boom (3) of the personnel hoist (1) is provided with at least two angle sensors (8a, 8b) arranged at a distance (L) from one another. When the boom bends, an angle difference (KE) whose magnitude is proportional to the magnitude of the bending is generated between angle values (K1, K2) of the angle sensors.