Cranes rising limit position limiter

Up limit position limiter is lifting one important safety device. When hoisting motion, the spreader in working height range. At the maximum working position, the spreader with the top of the supporting mechanism (such as a frame or a small  bridge crane, etc.) should have a certain distance. The specific size of this space, the driver is more difficult to master at work, coupled with inevitable negligence in work. Therefore, if the installation does not increase the limit position limiter or limiters failure, work, may occur to the upper supporting structure spreader top, and rising operation of the drive system lifting spreader situation continues,hoist crane resulting in wire breakage, and to spreader fall accidents.

Adopt and maintain its upper limiter work effectively to prevent similar incidents from happening, so "crane safety regulations" in the states: all power-driven crane, its lifting mechanism (including main and auxiliary hoisting mechanism), should be installation rising limit position limiter.

Up limit position limiter basic principle is the separation of a drive by the lifting motion action to trigger an electrical switch, resulting in increased transmission system to stop working,overhead bridge crane and thus play a protective role. The common form of hammer and screw two.