| 摘要 |
PURPOSE:To provide possibility of holding a sealing member always at normal temperature even though its circumstances want to heat or cool it by furnishing a temp. control part at a retainer member located in the neighborhood of the sealing member. CONSTITUTION:A temp. control part 6 consisting of ducts is furnished at a retainer member 1 located in the neighborhood of the sealing member 3. Thereby the sealing member 3 can be always held at normal temp. even when the circumstance wants to heat or cool the sealing member 3. Moreover, effective heat conduction is assured from the temp. control part 6 to the sealing member 3 universally because the heat conductor 4 is in contact with the retainer member 1 and an extension part 4b from the internal surface of the heat conductor 4 toward the moving member 2 is buried in the sealing member 3. Accordingly the sealing member 3 eventually heated or cooled can be promptly reinstated to the normal temp. and held there to ensure free from embrittlement owing to partial hardening. Thus the sealing performance initially intended can be secured for a long period. |
