| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal structure for an opening part at a plain divided case capable of setting a resistance value when an inserting component such as a cooling pipe or the like is inserted and passed at the inner circumference side of the packing to a low value, making its assembling characteristic more superior and at the same time setting a large seal surface pressure at the outer circumferential part of the packing, thereby making a seal characteristic more superior.SOLUTION: The present invention relates to a seal structure for use in sealing between a plainer divided case having an opening at aligned portions and an inserting component inserted into the opening and the structure has a rubber-like resilient packing to be installed between a circumferential edge of the opening of the case and the inserted component. The inner circumferential part of the packing is formed into a lip-shape. The inner circumferential part of the packing is also provided with a bead shape together with the lip-shape. The bead portion is pushed up to be widened by the inserted component to cause the outer circumferential part of the packing to be pushed against a circumferential edge part of the case. |
