Big bed guardrail

The utility model discloses a big bed guardrail, including mobile jib, vice pole and flexible connecting rod, the mobile jib is with vice the pole is vertical installs in four edges of bed board, andvice pole links to each other through the cap of being connected that is equipped with with the upper end of mobile jib, flexible connecting rod is located between the vice pole, and the both ends offlexible connecting rod link to each other with vice pole through the swing joint spare that is equipped with, swing joint spare is become by last casing and inferior valve body group. This big bed guardrail when need changing guardrail high, only needs to promote the sliding closure on the swing joint spare, makes the T type slider that links to each other with the sliding closure slide to the jack direction, and at this moment, the top pressing block on the T type slider then can connect the spring lug on the cap by the roof pressure to make it break away from the jack, like this alright reciprocate flexible connecti