| 摘要 |
PURPOSE: A nut loosening preventing apparatus for a point machine is provided to prevent the loosening of the nut by controlling a forward rotation and counter-rotation of a rotating member through a fixing member. CONSTITUTION: A screw thread(11) is formed on one end of a switch adjuster(10). A key groove(12) is formed on one side of the screw thread. A loosening preventing unit(A) includes a fixing member(20) and a rotating member(30). The fixing member and the rotating member are inserted between a contact controls. The fixing member and rotating member are combined each other. A plurality of rotation protective grooves is formed on a backside of a main body of the rotating member into a columnar direction. A nut unit is formed on a front side of the main body of the rotating member. The nut unit is screwed up with the contact control. |
