Multi-core cable untwisting device

A multi-core cable untwisting device for pulling out a tip portion of a sheath of a multi-core cable, which includes a plurality of electric wires and the sheath that covers the electric wires, while correcting kinks in the electric wires, the multi-core cable untwisting device comprising:

• a retention member configured to retain a non-tip portion of the sheath that has a cut between the tip portion and the non-tip portion;
• a gripping member configured to grip the tip portion of the sheath;
• a pull-out device configured to pull out the tip portion of the sheath by moving at least one of the gripping member and the retention member so that the gripping member moves away from the retention member;
• a rotating device configured to relatively rotate the tip portion of the sheath that is gripped by the gripping member and the non-tip portion of the sheath;
• and
• a control device configured to control the pull-out device and the rotating device,
• wherein the control device is configured to perform a first control and a second control from start until end of the pulling-out of the tip portion of the sheath, wherein the first control is to control the pull-out device and the rotating device so that the amount of rotation per unit travel distance of the tip portion of the sheath is smaller than a predetermined amount of rotation, and the second control is to control the pull-out device and the rotating device so that the amount of rotation per unit travel distance of the tip portion of the sheath is equal to or greater than the predetermined amount of rotation.