Multifunctional transport-carriage overturned seat fixing blocking pin device

The utility model relates to an overturned seat fixing blocking pin device, in particular to a multifunctional transport-carriage overturned seat fixing blocking pin device. The multifunctional transport-carriage overturned seat fixing blocking pin device comprises a seat assembly and stand columns, and is characterized in that a transposition bolt is arranged on each stand column and is composed of a base plate, a middle sleeve and a storage sleeve, the middle sleeves and the storage sleeves are fixed to the base plates, a U-shaped blocking pin is installed in each middle sleeve in a clearance fit mode, and a limiting block is arranged at the end of each U-shaped blocking pin; seat sleeves are arranged at the edges of the seat assembly. When the multifunctional transport-carriage overturned seat fixing blocking pin device is used, the seat assembly is lifted, the short ends of the U-shaped blocking pins are inserted into the seat sleeves, at the moment, the short ends can be prevented from being disengaged by means of the weight of the limiting blocks and the weight of the U-shaped blocking pins, and the structures are arranged on the two sides of a seat so that the seat can be effectively prevented from shaking. The multifunctional transport-carriage overturned seat fixing blocking pin device has the advantages of being simple in structure and reliable in work, and is suitable for various multifunctional transport vehicles.