lift height limiter

Abstract

The invention relates to a lifting height limiter comprising a vertical rod (2), a tension spring (4) and a link (7). The right end of the link (7) is provided with a pulley (8), the middle of the link (7) is hinged to the middle of the vertical rod (2), the left end of the link (7) is provided with an upper contact block (3) and a lower contact block (9), the upper end of the vertical rod (2) is connected to the left end of the link (7) through the tension spring (4), the lower portion of the vertical rod (2) is provided with a lower limiter unit (5) matching with the lower contact block (9), and the upper portion of the vertical rod (2) is provided with an upper limiter unit (6) matching with the upper contact block (3). According to the lifting height limiter, the link matches with the upper and lower limiter units, the dual-protection effect is provided, and the cage roof fall accident is avoided effectively.

Description

technical field [0001] The invention relates to a lifting height limiter, which is used for a construction hoist. It belongs to the technical field of safety protection devices. Background technique [0002] Construction elevators are also called construction elevators for buildings, and they can also be used as outdoor elevators and hoisting cages on construction sites. It is a manned and cargo-carrying construction machine often used in construction, mainly used for interior and exterior decoration of high-rise buildings, construction of bridges, chimneys and other buildings. [0003] The existing limiter is to set the side of the hanging cage (the limiter has a telescopic handle, which is braked when pressed, and normal operation when protruding), and a block that cooperates with the limiter is set on the main limb of the standard section (see Figure 10 ), when the construction elevator goes up, the cage moves upward along the guide rail frame, when it moves to the ape...

AI Technical Summary

Problems solved by technology

[0004] The above braking method has the following problems: After the construction elevator is used for a long time, the cooperation gap between the stopper and the limiter becomes larger, the fit is easy to be displaced, and the lifting handle of the limiter is easily damaged, which leads to the failure of the limiter , when the cage rises to the apex, the cage will continue to rise, and finally break away from the guide rail frame, causing an accident; at the same time, when the workers assemble and disassemble the top of the cage, the stopper has not been installed. At this time, the cage is most likely to fall and the cage will fall serious accident

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