Use of limit ruler

The purpose of this ruler is as follows:

Limit ruler, also called safety ruler, is used to bump the gear lever of crown block limiter. On the same day, the car runs to the set position and stops when it touches the limit ruler. This is a safety device, which is used to collide with the travel switch at both ends of the track of cars and carts. This ruler is made of angle steel with one end slightly inclined.

When the cart and the car are about to reach the finish line, the travel switch will touch the safety ruler and the cart or the car will stop. This device is the safety ruler. The crown block safety ruler is mainly used for small cars. Generally, there are limit switches on the main girder. When the car runs to the limit position, the safety ruler will touch the limit switch, so it will stop moving forward. Safety ruler is a safety device used to prevent the trolley of overhead traveling crane from exceeding the operating limit.