Cable supporting device

A cable supporting device for supporting a cable, comprising:

• a main body comprising a tubular portion, wherein a through hole, which extends in a first direction and into which the cable is inserted, is formed in the tubular portion, and an external thread is formed on a part of an outer circumferential surface of the tubular portion;
• an annular nut member, wherein an internal thread screwed with the external thread formed on the tubular portion is formed on an inner circumferential surface of the annular nut member;
• a stopper arranged on one side in the first direction with respect to the external thread formed on the tubular portion, and opposed to the nut member in the first direction;
• and
• a coil spring arranged in such a manner that the tubular portion is received on an inner circumferential side of the coil spring, wherein the coil spring applies, to the nut member, a rotational force in a direction toward the stopper,
• wherein,
• an engagement portion that engages a first end portion of the coil spring is formed in the nut member;
• an insertion groove is formed on the outer circumferential surface of the tubular portion and on the other side of the external thread in the first direction, a second end portion of the coil spring on a side opposite to the first end portion is inserted into the insertion groove;
• and
• the insertion groove at least has an abutting surface that abuts against the second end portion of the coil spring when the nut member screwed with the tubular portion is rotated in a direction away from the stopper.