| 摘要 |
<p>PROBLEM TO BE SOLVED: To achieve ventilation of a hydraulic equipment chamber in which hydraulic equipment becoming a heat source of a control valve, a hydraulic oil tank, or the like is stored.SOLUTION: A rail column 23b and vertical supports 24a, 24b which are made of hollow pipes extending from the inside of a hydraulic equipment chamber 13 to the outside above the hydraulic equipment chamber 13 are arranged in the hydraulic equipment chamber 13. In this configuration, ventilation is carried out by discharging air in the hydraulic equipment chamber 13 to the outside, with a chimney effect of the rail column 23b and the vertical supports 24a, 24b, and the rail column 23b and the vertical supports 24a, 24b are used as constituent members of first and second handrails 23, 24 utilized by an operator going up to and down from a top face of the hydraulic equipment chamber 13.</p> |
