| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a packing seal-type unleaded construction method in which a sealing property can be enhanced remarkably without a need of a high-grade skill degree by a method wherein a rubber packing, with an oil passage, in which an engaging groove and the oil passage are formed on the outer circumference and a trapezoidal packing, with an oil passage, in which an engaging groove and the oil passage are formed on the outer circumference in the same manner are screwed. SOLUTION: A rubber packing-side oil passage 21 and a rubber packing-side engaging groove are formed on a rubber packing 20 with the oil passage, and a trapezoidal packing-side oil passage 31 and a trapezoidal packing-side engaging groove are formed on a trapezoidal packing 30 with the oil passage. Then, the rubber packing-side engaging groove and the trapezoidal packing-side engaging groove are formed in a direction opposite to the threaded direction of a wavy aluminum coating layer 1 in such a way that they can be screwed to waves on the wavy aluminum coating layer 1 at an OF cable. Consequently, the rubber packing 20 with the oil passage and the trapezoidal packing 30 with the oil passage can be screwed and integrated. As a result, their mutual dislocation can be eliminated completely, and the sealing property of a packing seal-type unleaded construction method can be enhanced without a need of a high-grade skill degree.</p> |
