PROBLEM TO BE SOLVED: To prevent a cable from being damaged by rubbing it with a helicopter. SOLUTION: A protection frame 2 is installed on a side surface of a machine body below a winch 11 equipped on the helicopter 10. A support groove 213 of a circular cross section long in a horizontal direction is formed on the protection frame 2, and a slide-contact body 3 of a cylindrical shape is rotatably fitted to the support groove 213. A part of a peripheral surface of the slide-contact body 3 fitted from an opening part of the support groove 213 is exposed, and the cable 12 hung down from the winch 11 is brought into contact with the exposed part. The slide-contact body 3 is divided into two or more parts, and it is formed by continuously aligning the divided slide-contact bodies 30 of the cylindrical shape. Both ends of the divided slide-contact body 30 are formed to recession-like or projection-like taper shapes 31, 32, and they are aligned by fitting the recession and the projection of the tapers 31, 32 of the ends of the adjacent divided slide-contact bodies 30 to each other. COPYRIGHT: (C)2009,JPO&INPIT