| 摘要 |
<p>PURPOSE: To hold a plug when the value of pressure becomes a high level abnormally by inserting the plug in an outer case, abutting and positioning the male taper part of the plug on the female taper surface of the outer case, bending the outer cases at the intermediate diameter and small diameter parts of the plug respectively, and fastening and fixing it. CONSTITUTION: A piston 2 is housed in an outer case 1a, a plug 5 is inserted, a male taper part 5f abuts on a female taper surface 1h, positioning is carried out, the side of the opening 1b of the outer case 1a, and the side is fastened on the intermediate diameter part 5c of the plug 5. The top end of the opening 1b is bent, and it is rolling-fastened on the small diameter part 5a of the plug 5. When pressure of gas in the outer case 1a becomes a high level abnormally, a weak part is expanded, the annular part 5d of the plug 5 is taken off from the bending part 1f of the outer case 1a, the annular part 5b of the plug 5 is taken off from the bending part 1d since the diameter direction displacement of the outer case 1a is small, gas is blown out, and thereby, the plug 5 can be held on the outer case 1a.</p> |
