| 摘要 |
The present invention relates to a prefabricated housing for a door lock of a fire door. The present invention is provided to manufacture a housing used for preventing the damage, deformation, or separation of a door lock device of a fire door. The present invention can increase productivity and workability since the housing is formed not by an existing welding method but by a prefabricated method, and can conveniently replace or repair the door lock since the housing is formed to facilitate the assembly or disassembly. |
