| 摘要 |
<p>A water-tight structure of a simple construction which has a high waterproofing effect and a low sliding resistance, and which is provided between a lower arm of and a processing liquid tank for an immersion wire electric discharge machine. First and second water-tight structures are provided between a wall (24) of a processing liquid tank (23) through which a lower arm (22) is passed and the lower arm (22). The first water-tight structure is provided with a slide plate (27) moving slidingly along with the lower arm (22), and the second water-tight structure is provided with an oil seal (29) which is provided at the portion of the slide plate through which the lower arm (22) passes, and which contacts the outer circumferential surface of the lower arm (22).</p> |
