| 摘要 |
<p>The purpose of the present invention is to achieve an efficient and stable shut-off capability in shuttering off a current without increasing the size of a driving device, thereby achieving size reduction and cost reduction. A driving device (31) is housed inside a casing (3), and an insulation operation rod (9) is attached to the driving device (31). The insulation operation rod (9) receives a rotational force from the driving device (31) and rotates centered on a central axis. Integral to the insulation operation rod (9), crank portions (14a, 14b) having the shape of a protrusion are provided. The crank portions (14a, 14b) are disposed at positions offset with each other by 180° with respect to the insulation operation rod (9). At least one support insulation tube (4) is fixed on the top face portion of the casing (3), a porcelain insulation tube (5) is attached, via a centerpiece (6a), to the upper extremity of the support insulation tube (4), and a porcelain insulation tube (5) is attached, via a centerpiece (6b), to the connecting portion between the support insulation tube (4) and the support insulation tube (4).</p> |
