Double-simple-support type anti-falling comb-shaped bridge expansion device

The invention discloses a double-simple-support type anti-falling comb-shaped bridge expansion device. The device is characterized in that a comb plate A is arranged on an anti-falling steel plate, comb teeth of a comb plate B and comb teeth of the comb plate A are arranged on the anti-falling steel plate flat in a mutual insertion mode, and the anti-falling steel plate is supported by a base anchoring part A and a base anchoring part B provided with a stainless steel sliding plate through a simple support structure; a tooth root end plate of the comb plate A is fixedly connected with the anti-falling steel plate and the base anchoring part A; a tooth root end plate of the comb plate B is arranged on the stainless steel sliding plate through a leveling steel plate and fixedly connected with the leveling steel plate, the stainless steel sliding plate and the base anchoring part B. Compared with the prior art, the device has the advantages that comb teeth of the comb plate B and comb teeth of the comb plate A i