SHAFT SEAL UNIT

To provide a shaft seal unit having excellent sealability, low friction force, and a long service life in a simple structure.SOLUTION: A shaft seal unit for a shaft part of a rotary body includes an outer periphery part including a sectionally circular cylindrical cavity, and a cylindrical rotary shaft following member arranged in the cylindrical cavity, the outer periphery part including a seal member on the inner peripheral face of the cylindrical cavity, the seal member having an inner peripheral surface part abutting on the outer peripheral face of the cylindrical rotary shaft following member, the cylindrical rotary shaft following member including a rotary shaft insertion hole in the center, whereby the movement of powder between the cylindrical rotary shaft following member following the rotation of the rotary shaft and the outer periphery part is restricted.SELECTED DRAWING: Figure 1 【課題】 優れたシール性、低摩擦力で、高寿命で、簡便な構造の軸シールユニットの提供。【解決手段】 断面円形の円筒状空洞を備えた外周パーツと、円筒状空洞内に配された円筒状回転軸従動部材とを備えた回転体軸部用軸シールユニットであって、該外周パーツは、その円筒状空洞内周面上にシール部材を備えており、該シール部材の内周表面部は円筒状回転軸従動部材の外周面に当接しており、該円筒状回転軸従動部材は、その中心に回転軸挿入孔を備え、回転軸の回転に追従する該円筒状回転軸従動部材と該外周パーツとの間の粉体の移動を規制するための、回転体軸部用軸シールユニット。【選択図】 図１