摘要:
The invention relates to an arrangement in an elongated working platform (2) which at each end is carried by a mast via a drive support (8) movable along the mast. The drive support includes an electric motor unit by means of which the drive support is drivable along the mast, said drive support pivotally carrying the corresponding end of the platform. At each motor unit an operating means for manual release of a motor brake for lowering the platform in case of power failure, is connected to a levelling device (24-38). The levelling device is arranged to be triggered in order to prevent movement of a drive support resulting in deviation of the platform from a position essentially corresponding to the horizontal position, said transmission being arranged to return the operating means to a position activating the motor brake, if the manual release of the motor brake causes triggering of the levelling device.
摘要:
Dans un élévateur à vis, la cage (4) de l'élévateur est portée par un écrou d'entraînement (10) monté rotatif sur une vis (2) sensiblement droite, la cage de l'élévateur portant un moyen de support (8) et un moyen d'entraînement (6) pour l'écrou. La vis (2) est supportée par plusieurs consoles de support (14) fixées à ladite vis sur sa longueur. Ledit écrou (10) a la forme d'une spirale dotée de spires, dont le pas et l'épaisseur axiale (a) sont adaptés à la distance (b) entre les consoles (14) et la dimension (c) de celles-ci dans le sens de la longueur de ladite vis de manière à permettre à l'écrou de passer librement devant les consoles lorsque celles-ci passent entre les spires de l'écrou pendant le passage.
摘要:
A lift car securing arrangement includes a restraining arrangement having a restraint that is supported by the lift car arranged such that it can be placed into and removed from restraining interaction with an extended stationary interaction element arranged to extend along the vertical pathway of the lift car, and which restraint when placed into restraining interaction locks the lift car to the stationary interaction element, a power-interruption device that can be placed into and removed from a power-interrupting position whereby the power to a driving motor unit that is part of the lift is interrupted when the power-interruption device is placed arranged in its power-interrupting position, in which the power-interruption device is so arranged at the restraining arrangement that the said power-interruption device is located in its power-interrupting position when the restraint has been set into restraining interaction with the extended stationary interaction element.
摘要:
In a lift powered by a combustion engine having a lift cage and a driving means which is moved with the lift and control means (35, 37, 39, 41) arranged in the lift cage to control the throttle of the combustion engine (15) and to operate a brake which is applied in an inoperative state to prevent movement of the lift cage, there is a centrifugal clutch (17), which is arranged after the combustion engine (15) and which couples the engine (15) to the drive chain at a determined speed of the engine, the coupling speed. A throttle control (39) is connected to a disc cam having a cam surface, which via a cam follower influences the operating means of the brake (33) to move in a releasing direction when increasing the speed of the engine such that when the coupling speed of the centrifugal clutch (17) has been obtained, the brake (33) is completely released and allows the lift cage to move along the drive track.
摘要:
The present invention concerns an arrangement for a hoist to secure safety zones in case persons should be outside the hoist cage in a hoist shaft, comprising a means of identifying risk situations and mechanical means of limitation that can enter into the path of the hoist cage arranged at a distance from the upper and lower end limits of the hoist cage during normal operation in order to form an upper and a lower safety end limit, mechanically securing the said safety zones. The arrangement involves that striking surfaces are arranged to tilt between an inactive state outside the path of the hoist cage and an active state in the path of the hoist cage forming the said safety end limits, that the striking surfaces are so balanced that they strive to take their respective active states and that a retaining device is arranged on each striking surface to keep the striking surfaces in an inactive state during normal operation and to release the striking surface in a risk situation so that they take their respective active states.
摘要:
The present invention concerns an arrangement for a hoist to secure safety zones in case persons should be outside the hoist cage in a hoist shaft, comprising a means of identifying risk situations and mechanical means of limitation that can enter into the path of the hoist cage arranged at a distance from the upper and lower end limits of the hoist cage during normal operation in order to form an upper and a lower safety end limit, mechanically securing the said safety zones. The arrangement involves that striking surfaces are arranged to tilt between an inactive state outside the path of the hoist cage and an active state in the path of the hoist cage forming the said safety end limits, that the striking surfaces are so balanced that they strive to take their respective active states and that a retaining device is arranged on each striking surface to keep the striking surfaces in an inactive state during normal operation and to release the striking surface in a risk situation so that they take their respective active states.
摘要:
A versatile construction hoist system comprises a hoist trolley (2) having a first pair (16, 18) of connection members, and a work platform (32) having a second pair (38, 40) of connection members. The work platform is releasably connectable to the trolley through interconnection of the first and second pairs of connection members with the work platform in a horizontal position in which the work platform floor is situated at the first level (55) relative the trolley. A transport platform (60), which has a third pair (74, 76) of connection members, is releasably connectable to the trolley (2) through interconnection of the first (16, 18) and third pairs (74, 76) of connection members with the transport platform in a horizontal position in which its floor (62) is situated at a second level (80) relative the trolley, said second level being below said first level. An adapter (66) enables use of standard transport platform elements.
摘要:
An actuating mechanism for a catch (3) of a hoist door (4) comprises a vertically displaceable operating member (16), which is associated with a vertically displaceable actuating member (46), by means of which the catch (3) may be released. A coupling mechanism is provided between the actuating member (46) and the operating member (16) and has a cam follower (36), which in engagement with a cam (56) locks the coupling mechanism in such a manner that a displacement of the operating member will be transferred to the actuating member (46) for the release of the door catch (3). When the cam (56) is absent no movement will be transferred to the actuating member (46). The cam (56) and the cam follower (36) are provided on a hoist cage at a landing, respectively, or vice versa, so that the door catch (3) may be released, only when the hoist cage is at a landing. The coupling mechanism is a toggle joint mechanism, having two pivotably connected link arms (28, 38), the cam follower (36) being associated with the common pivot (34) of the link arms (28, 38). The opposite ends of the link arms (28, 38) are connected to the operating member (16) and the actuating member (46), respectively.
摘要:
An elevator interlocking mechanism, having interlocking of the elevator (1) cage door and interlocking of each landing door (48), comprises operating means for releasing the interlockings when the elevator cage (1) is at rest at a landing. In this case the elevator cage interlocking comprises an elevator door locking rod (8), which in a locking position engages a lock pin (11), which prevents the elevator cage door from being opened, each landing interlocking including a corresponding landing door locking rod (32), which in a locking position engages a locking pin (38), which prevents the landing door from being opened. Thereby, the locking rods (8, 32) are jointly operated by a single operating means (2, 4) in such a manner that the operating means at a proper landing position displaces the elevator locking rod (8) from its locking position, this locking rod (8) in turn displacing the landing door locking rod (32) from its locking position by means of a cam (30) rigidly connected to said latter locking rod (32).
摘要:
In a screw lift the lift cage (4) is carried by a drive nut (10) rotatably provided on an essentially upright screw (2), the lift cage carrying a bearing means (8) and a drive means (6) for the nut. The screw (2) is supported by several supporting braces (14) attached thereto along the length thereof. The nut (10) has the shape of a spiral having turns, the pitch and axial thickness (a) of which are adapted to the distance (b) between the braces (14) and the dimension (c) of these in the length direction of the screw so as to enable the nut to pass freely past the braces by passing between the turns of the nut during the passage.