| 摘要 |
PURPOSE:To enable simplification of working by subjecting the peripheral threaded part of a bleed tube, and further forming a thick film of a soft metal such as zinc or the like, in the fuel jet which is inserted in and screwed to the bleed tube. CONSTITUTION:A bleed tube 7 is inserted into a guide hole 6 and screwed by the threaded part 8, and the fuel jet 9 is inserted therein and screwed by an outer peripheral threaded part 10. Then, when the jet 9 is rotated to be replaced, a rotational force is acted on the tube 7. However, since a film 8a of a soft metal is formed beforehand, on the outer peripheral threaded part, the film acts to prevent relaxation, and only the jet 9 is removed. The relaxation preventing function causes a large compresson force upon clamping the threaded part 8, and subjects the threaded part 8 to generate large contraction force resulting in elastic deformation to cause the tightness between the screw thread on the side of the tube 7 and the screw thread on the side of the guide hole 6. |
