Drop prevention pin-hole beam device

A pin-hole type anti-drop beam device, which belongs to the field of bridge construction; assembly of the apparatus by a fixed end, the movable end assembly, limiting components, the fixed end by a fixed end plate assembly, consisting of the fixed end fitting, said fixing an apertured end plate steel open pit, the fixed end fitting to the ear holes of the pin connector, the fixed end plate by welding, the movable end plate assembly by the movable end, the movable end fitting composition, the active side flat steel plate is open, the movable end of the linker is connected to the pin holes of the ear piece, the movable end plate by welding, the restraining means by a first-order shear pin, a nut-order, first-order shim, second shear pin, second nuts, gaskets composed of second order. Clearly the concept of the present invention, the principles of clear, simple manufacture, may be mounted on both sides of the bridge expansion joint member, the probability of occurrence of the earthquake damage bridge girder for reducing off.