Braking force adjustable gradual falling prevention safety device applicable to guide rail of rack body

The utility model discloses a braking force adjustable gradual falling prevention safety device applicable to a guide rail of a rack body, relating to the cage failing-proof safety field. The braking force adjustable gradual falling prevention safety device comprises a base body, on which wedge blocks, racing-to-top adjustment blocks, sliding blocks, disc springs, resetting pullback springs and brake cables are arranged. The braking force adjustable gradual falling prevention safety device is simple in structure, and is provided with the wedge block racing-to-top adjustment member and the disc spring adjustment member, which realizes the adjustment performed on the braking force of the rack guide rail by the wedges through the practical performance parameters of the cage. When the case surpasses the predetermined speed or falls off, the braking force adjustable gradual falling prevention safety device enables the cage to decelerate according to the predetermined deceleration and finally stop on the guide rail. The braking force adjustable gradual falling prevention safety device is provided with two wedge blocks which are connected to the brake cables and connected to a lever system which is interlocked with a speed governor, so that the braking can be achieved by tightly locking the two wedge blocks when the distances between the two wedge blocks and the guide rail are different. By directly connecting the lever system and the wedge blocks which are positioned differently in a three-dimensional space for transmission, the braking force adjustable gradual falling prevention safety device simplifies the transmission system and improves the braking effects.