| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an earth hook capable of switching on/off a connection to a ground in a state in which the earth hook is attached to a power transmission line. <P>SOLUTION: An earth hook 1 comprises: an oblong operation rod 2; a hold part 3 for holding a power transmission line S as an electric line by an operation of the operation rod 2; a terminal part 4 to which a grounding line 40 is connected; and a conduction switching mechanism 5 for switching conduction and non-conduction between the hold part 3 and the terminal part 4 by an operation of an operation member 50 arranged in the operation rod 2, the earth hook 1 enabling a user to switch between a connection and disconnection of the power transmission line S and a ground E without removing the earth hook 1 from the power transmission line S. The conduction switching mechanism 5 is configured such that, when a voltage exceeding a prescribed value is applied in a state where the hold part 3 and the terminal part 4 are not conducted, it can flow current. So, if a voltage exceeding a prescribed value is applied to the power transmission line S in a state where the connection between the power transmission line S and the ground is disconnected, the current is allowed to flow to the ground. <P>COPYRIGHT: (C)2013,JPO&INPIT |
