Abstract: Provided is a packing arrangement structure which can prevent rotation of a packing. The packing arrangement structure includes an annular packing disposed between a first member and a second member. The packing includes an annular portion main body extending in an axial direction of the packing and a protruding portion protruding from the annular portion main body in an outward direction or in an inward direction. The first member is provided with a recessed portion configured to house the protruding portion and formed into a shape corresponding to the protruding portion. The protruding portion is formed such that a circumferential dimension of a top portion thereof located in a protruding direction is greater than a circumferential dimension between basal parts thereof.

Abstract: The feeder connector consists of feeding-side and receiving-side connectors. The feeding-side connector includes a casing consisting of split-type cases fastened to each other, a connector body slidably installed in a front half section of the casing, and a handle movably mounted in a rear half section of the casing such that it advances through rotation of a lever to push the connector body against the receiving-side connector, the handle also serving as lead wires-passing tube. The lever includes a first locking means for locking the connector body in an engaged state with a mating connector body of the receiving-side connector, a second locking means operated through energizing an electro-magnetic coil, and a means for releasing the lever from the locking by the first locking means after the locking by the second locking means is released by deenergizing.