| 摘要 |
PROBLEM TO BE SOLVED: To realize size reduction and simple structure of a counterweight while keeping cooling efficiency by providing the counterweight with a weight member serving as the cooling fan. SOLUTION: A casing 1 is provided with a fixed scroll 2, a driving shaft 3, and a turning scroll 5. A slider 14 restricts rotation of the turning controller during turning. A plurality of weights 17 are disposed on a rotary plate of a counterweight along its circumferential direction each spaced at an interval. An end plate 5A of the turning scroll 5 is provided with a cooling fin 8. As a result, cooling air can be efficiently circulated into cooling air passages 18, 19, 20 formed on both sides of the slider 14, thus enhancing cooling efficiency in the easing 1.
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