Elastomer expansion joint device

The utility model discloses an elastic body expansion joint device and relates to the field of bridge expansion joints, the inner side of a concrete bridge plate is connected with symmetrical steel members in a pouring mode, an elastic body is arranged between the steel members, the inner sides of the steel members are movably provided with bottom liners, and the bottom liners are located at the bottom of the elastic body. A protection assembly is movably installed on the upper portion of the inner side of the steel member, a drainage assembly is fixedly installed in the elastic body, a limiting sliding groove is formed in the upper portion of the inner side of the steel member, and the protection assembly is movably clamped in the limiting sliding groove. By means of the protection assembly which is installed between the steel members and located above the elastic body, dust, stones and other impurities are blocked under the action of the protection assembly in the using process, the stones and other impurit