| 摘要 |
PROBLEM TO BE SOLVED: To provide a piping connection device for a construction machine adaptable to connection of thin piping without deteriorating strength of the piping, and capable of facilitating execution of work. SOLUTION: A protruding part 21a formed by deforming a piping thick part from an inner side to an outer side is provided in the vicinity of ends of the respective piping 21 to be connected. A seal ring 25 made of an elastic material is externally fitted between the end of the respective piping 21 and the protruding part 21a. A part of the seal ring 25 is covered by a retainer 27. An end of a cylindrical sleeve 26 is fitted to the vicinity of the end of the respective piping 21. A remaining part of the seal ring 25 is covered by a tapered part 26c on both ends of the sleeve 26. The tapered part 26c on both the ends of the sleeve 26 and the retainer 27 are surrounded by a clamp ring 28, and the seal ring 25 is fastened and fixed to the piping 21 by a bolt 29 and a nut 30 together with the retainer 27 and the clamp ring 28. COPYRIGHT: (C)2011,JPO&INPIT
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