Tokyo-buhin Kogyo Co., Ltd

Junya Kaneko

Toshiyuki Ishida

Shin Yoshida

Mitsuyoshi Ohba

In the expander ( ) in a drum brake, when the brake is activated, the sleeve ( ) is extended in the lateral directions in the drawing by the wedge ( ) inserted within the housing ( ), and the shoe engaged with the clip ( ) is swung to press the lining ( ) against the drum, and friction braking is performed. When the lining ( ) wears away and the amount of movement of the sleeve ( ) increases, the sleeve ( ) is rotated by reciprocal action with a drive ring ( ) that is engaged with the periphery of the sleeve and, thereby, the pressing screw ( ) screwed thereon comes out by the amount of the increase of movement (the amount of wear on the lining). A flat surface ( ) is formed on the periphery of the sleeve and the detecting head ( ) of the displacement detection apparatus detects the rotation of the sleeve ( ).

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Tokyo, Japan

Junya Kaneko