| 摘要 |
PURPOSE: An earth bolt structure is provided to insert a washer after inserting an earth bolt into an earth terminal, to be in gear with a screw thread of a bolt, thereby preventing a wrong operation of the earth bolt generated during in-line operation. CONSTITUTION: An earth bolt(1) is inserted into an earth terminal(2) having a projector, to hook a flange of the earth bolt over the projector of the earth terminal. A washer(3) has a disc-type upper surface and a conic lower surface whose upper part is wide and a lower part is narrow. The washer is inserted, to make the lower surface of the washer in gear in a screw thread of the earth bolt.
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