| 简介 |
PROBLEM TO BE SOLVED : To provide an invasion prevention fence that effectively prevents monkey invasion even if intervals of electric wires are widened so as to reduce the danger of electric leakage.
SOLUTION : A plurality of supports 10a are driven in the ground at prescribed intervals. The lower ends of plates 20a are fixed on the upper ends of the supports 10a and the plates face upward from the upper ends of the supports 10a, incline forward and extend. Wire nets 30 are stretched tightly between the supports 10a so as to cover spaces from the surface 60 of the earth to prescribed heights in the vicinity of the upper ends of the supports 10a. The wire nets 30 have electrical conductivity and are grounded to the surface 60 of the earth. Monkey nets 40 are stretched tightly between the plates 20a so as to cover spaces from the upper edges of the wire nets 30 to prescribed heights in the vicinity of the upper ends of the plates 20a. One or more electric wires 50 are fixed on the plates 20a and installed along the monkey nets 40. The electric wires 50 are in parallel with the upper edges and the lower edges of the monkey nets 40. A high-voltage pulse is applied to the electric wires 50 at prescribed intervals (impulse current flows).
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