| 摘要 |
PURPOSE: A lifetime extensive wooden door with a height adjustment device is installed with a height adjustment device using a spring on the top and is coated by the surface to obtain strong rustproof properties and extend the lifetime. CONSTITUTION: A lifetime extensive wooden door with a height adjustment device is formed with a coating layer on the surface. The coating layer contains phosphate, titanium dioxide as an inorganic material, and red clay. A height adjustment device comprises a case, a coil spring, a rod, a connection member, and a roller. The height adjustment device is installed on the top of a wooden door. The rod is in touch with the top end of the coil spring inside the case. The connection member is joined to the top end of the rod. The roller is joined to the top end of the connection member. The roller rolls and comes in contact with an upper door frame. |
