PROBLEM TO BE SOLVED: To improve a shouldering feeling, to reduce a load in work time, to improve stability in shouldering time, and to facilitate taking-around of a shouldering band.SOLUTION: A pair of left-right recessed parts 9 and 9 are provided in an inverse truncated chevron shape when viewed from the shouldering surface side in an upper part on the shouldering surface side of a tank 3, and a pair of left-right rod-like members 14 and 14 for installing an upper end part 20A of a shouldering band 20, are arranged in a truncated chevron shape when viewed from the shouldering surface side in the pair of left-right recessed parts 9 and 9, so that the rod-like members 14 are formed in substantially parallel to an inclination of a shoulder of an operator, and the shouldering band 20 is obliquely pulled out and can be hooked along the inclination of the shoulder as it is, and a twist of the shouldering band 20 is prevented, and a shouldering feeling is improved. Thus, the shouldering band 20 is pulled out along the inclination of the shoulder, and can be thereby further fitted to the body, and a load in work time is reduced, and the center of gravity is brought near to a back, and shouldering time stability is improved. In addition, an upper part of the recessed part 9 for arranging the rod-like member 14 is opened upward, and the shouldering band 20 is easily taken around.SELECTED DRAWING: Figure 3
