| 摘要 |
<p>A bolt 121 has a cylindrical fit receiving portion 121i. When the bolt 121 slides forward, the rear part of a valve body 122 enters the fit receiving portion 121i. At a closed end 121d opposed to its opening 121g behind the fit receiving portion 121i, a cylindrical body 151 is provided. The cylindrical body 151 lets the interior of the bolt 121 and the exterior of the bolt 121 communicate with each other. The shank 154 of an opening/closing body 153 is slidably placed in the cylindrical body 151. This opening/closing body 153 has an lid portion 155 at the end of the shank 154 on the fit receiving portion 121i side and a coming-off preventing portion 156 at the outside end of the shank 154. An opening/closing body spring 152 is placed between the closed end 121d of the bolt 121 and the lid portion 155 and pushes the lid portion 155 toward the fit receiving portion 121i.</p> |
