| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a liquid mixture injection apparatus having a rubber plug which keeps a slit in a closed condition even when liquid pressure within a chamber section is increased while the slit of the rubber plug is closed. <P>SOLUTION: A liquid mixture injection unit 10 of the liquid mixture injection apparatus A includes the chamber section 11, a downstream branch pipe 12, a connecting opening 13 and an upstream branch pipe 14 which are extending in different directions from the chamber section 11, and a cap member 20 attached to the connecting opening 13b. The rubber plug 25 having the slit 25a is attached within the cap member 20. The inner circumferential surface of the cap member 20 has the inner circumferential face 21b tapered gradually from the lower side to the upper side, and a part of the rubber plug 25 that comes into close contact with the inner circumferential face 21b is tapered gradually from the lower side to the upper side. In addition, the inclination angle of the outer circumferential surface of the rubber plug 25 is larger than that of the inner circumferential face 21b. <P>COPYRIGHT: (C)2008,JPO&INPIT |
