Abstract: An electronic component feeding apparatus which conveys electronic components in a alignment state to a predetermined position. This apparatus includes a conveying tube for conveying electronic components having a predetermined shape in a alignment state, an air cylinder for exerting an air suction into the conveying tube from an end of the conveying tube, and a movable stopper plate for stopping the electronic components conveyed in the alignment state.

Abstract: A rotary support device comprises an annular upper member and an annular under member which are so arranged that their inner or outer peripheral walls overlap each other with a small clearance formed therebetween. The overlapping peripheral walls are bent toward each other to form a pair of retaining portions which are rotatable relative to each other. A plurality of steel balls held spaced apart equidistantly by a retainer are rollably provided between the two members.

Abstract: A device including a stretchable assembly (2) of pairs of intersecting arms (3) and (4) pivoted to each other at the intersections for raising or lowering a table (5) mounted on the upper ends of the arms. The stretchable assembly (2) is vertically expandable or collapsible by a unit (6) of a cylinder (61) for advancing or retracting a piston rod (62), a pump (63) and an oil tank (66) mounted on a base plate (7) and fixed to a frame (1) at the lower end of the stretchable assembly (2). The piston rod (62) extends substantially upward from the cylinder (61) and is connected at its forward end to lower portions of the arms (3). The piston rod (62) intersects the arms (3) substantially at right angles thereto when the stretchable assembly (2) is in its collapsed position.