ROTARY SWITCHING VALVE

To reduce costs by fixing packing mounting members without using other components excluding the packing mounting members and a valve casing in a rotary type switching valve in which annular packings 5 are mounted in annular packing mounting grooves 4 formed around opening ends to a valve chest 11, of radial ports 131, 132 formed on the valve casing 1, the annular packing mounting members 6 having inner peripheral-side groove walls 42 and bottom walls 43 of the packing mounting grooves are disposed separately from the valve casing, and the packing mounting members are fitted and fixed to the valve casing at the radial ports.SOLUTION: Recessed grooves 131 are formed on peripheral wall surfaces of radial ports 131, 132 of a valve casing 1, and claw portions 62 elastically fitted to and engaged with the recessed grooves 131 are disposed on the packing mounting members 6. Fixing means of the packing mounting members 6 are composed of the recessed grooves 131 and the claw portions 62. Further the packing mounting members 6 may be fixed by press fitting, thermal deformation, adhesion and the like.SELECTED DRAWING: Figure 2 【課題】弁筐１に形成した径方向ポート１３１，１３２の弁室１１に対する開口端の周囲に設けられた環状のパッキン装着溝４に環状のパッキン５が装着された回転式切換弁であって、パッキン装着溝の内周側溝壁４２と底壁４３とを有する、弁筐とは別体の環状のパッキン装着部材６が設けられ、パッキン装着部材が径方向ポートにおいて弁筐に嵌合固定されるものにおいて、パッキン装着部材をこれと弁筐以外の部品を用いずに固定できるようにして、コストダウンを図る。【解決手段】弁筐１の径方向ポート１３１，１３２の周壁面に凹溝１３１を形成し、パッキン装着部材６に、凹溝１３１に弾性的に入り込んで係合する爪部６２を設ける。そして、凹溝１３１と爪部６２とでパッキン装着部材６の固定手段を構成する。また、圧入、熱変形、接着等でパッキン装着部材６を固定してもよい。【選択図】図２