WEIGHT DEVICE OF SWINGING MACHINE BODY

PROBLEM TO BE SOLVED: To facilitate installation of a weight and reduce cost by providing a bulged part having a mounting part for a weight suspending member integrally with a counterweight. SOLUTION: A rear face of a counterweight 20 is formed in a circular arc shape in plan view and left and right side parts are formed on a straight line along a swinging machine body. Bulged parts 21 bulged upward in a circular arc shape are provided on the left and right side parts and the rear side part 25 constitutes an approximately horizontal form at a position lower than the bulged parts 21. The bulged parts 21 are formed integrally with the counterweight 20 and covers the outside face of a hood from outside. Therefore, side parts of a seat where field of vision becomes bad at the time of swinging can be protected by the bulged parts 21, and further man-hours for fabricating and assembling can be reduce by forming the bulged parts 21 integrally with the counterweight 20. In the vicinity of the top of the bulged parts 21, mounting holes 22 penetrating in left and right directions is provided, and mounting holes 23 in vertical directions are formed in the top face of the rear part 25 of the counterweight 20 so that the weight is stably lifted so as to perform assembly work smoothly.