| 摘要 |
PROBLEM TO BE SOLVED: To provide a slide plug for an injector with tight sealability and slidability, by making a column body of the slide plug for an injector to have the maximum diameter part at the middle part in the axis direction and the diameter is gradually reduced in forward and rearward directions from the maximum diameter part. SOLUTION: A screw hole 13 of a plunger 21 is equipped on an axis part of a laminate slide plug 10, and the slide plug is inserted into an injector outer tube 22 by the plunger 21. The laminate slide plug 10 is a rotation symmetry body centering on the axis line and made so as a contact face 14 at which the outline of the laminate slide plug cut by a cross section passing through the axis line is in contact with the injector outer tube 22 to be composed of a part of an arc. The arc is set in a position where it center is afar in a direction orthogonally crossing with the axis line and made to make the maximum outer diameter of the laminate slide plug, the maximum diameter of the contact face 14, only one at a middle part in the axial direction length of the contact face 14. The diameter is gradually reduced in forward and rearward directions to integrally form a taper plug part 17 with a diameter gradually reducing rearward from the maximum outer diameter part. |
