| 摘要 |
<p>Two liquid sealing sections are arranged on the outer peripheral surface of a mandrel section (13) at an interval in the axial direction, the mandrel section (13) pressing and expanding a pipe material (P) from the inside by hydraulic pressure and affixing the pipe material (P) to the pipe hole. The liquid sealing sections each comprises, in order from the liquid discharge opening (13c) side: an annular elastic member (15, 16); an annular guide member (17, 18) having a tapered sloped surface facing the annular elastic member (15, 16); an annular deformable member (19, 20) having an outer diameter expanded by being compressed by pressing force from the annular guide member (17, 18); and an annular engagement member (21, 22). The annular elastic member (15, 16), the annular guide member (17, 18), and the annular deformable member (19, 20) can move in the axial direction on the outer peripheral surface, and the annular engagement member (21, 22) cannot move. The annular elastic members (15, 16) are formed so that the outer diameter thereof is smaller than the inner diameter of the pipe material (P) and that the annular elastic members (15, 16) can move in the axial direction on the sloped surfaces. Preferably, a communication groove (21a, 22a) for connecting spaces formed on the annular end surface side of annular positioning member (23, 24) is provided in the annular engagement member (21, 22) and in the annular positioning member (23, 24) which is located on the outer peripheral surface of the annular engagement member (21, 22).</p> |
