Abstract: An air damper includes: a piston adapted to reciprocate in a cylinder; an annular recessed portion formed along an outer periphery of the piston; a sealing member fitted in the recessed portion in a slidable manner, adapted to slidingly contact an inner peripheral surface of the cylinder, and forming air chambers on both sides of the piston, respectively, together with the piston; a communicating device allowing the air chambers formed on both sides of the piston to communicate with each other or not to communicate with each other depending on a stopping position of the sealing member; and a reduced-diameter portion formed by reducing a diameter of the cylinder on one end side thereof so as to gradually increase a frictional force between an inner periphery of the reduced-diameter portion and the sealing member.

Abstract: An air damper includes: a piston adapted to reciprocate in a cylinder; an annular recessed portion formed along an outer periphery of the piston; a sealing member fitted in the recessed portion in a slidable manner, adapted to slidingly contact an inner peripheral surface of the cylinder, and forming air chambers on both sides of the piston, respectively, together with the piston; a communicating device allowing the air chambers formed on both sides of the piston to communicate with each other or not to communicate with each other depending on a stopping position of the sealing member; and a reduced-diameter portion formed by reducing a diameter of the cylinder on one end side thereof so as to gradually increase a frictional force between an inner periphery of the reduced-diameter portion and the sealing member.

Abstract: A substrate supply apparatus includes a substrate-accommodating section for accommodating a substrate on which electronic components are to be mounted, a substrate-width-adjusting device, a transporting device, a substrate-sucking device, and an elevating device. The accommodating section has substrate-width-regulating sections a distance between which can be adjusted in a width direction of the substrate. The adjusting device adjusts the distance between the regulating sections by moving one of the regulating sections in the width direction. The transporting device is supported by the regulating sections, has a pair of rails, is arranged above the accommodating section, and transports the substrate to an electronic component-mounting apparatus. The sucking device has a long substrate-sucking arm and a plurality of short substrate-sucking arms. Each of the substrate-sucking short arms is position-changeably installed on the long substrate-sucking arm.

Abstract: A fastener for securing an insulator in the form of a sheet onto a floor panel, comprising a stem portion adapted to be passed through and secured in a mounting hole provided in a floor panel or the like, a flange portion at a base end of the stem portion, and flat pieces which can be secured in a position to interpose the insulator between the flange portion and the flat pieces. The flat pieces may be bent toward the stem portion so that the flat pieces may be passed through an opening provided in the insulator along with the stem portion and then extended to the position for interposing the insulator between the flange portion and the flat pieces. The flat pieces may be provided with engagement means for securing them at this position. Once the fastener is thus integrally attached to the insulator, the positioning of the fastener is facilitated without requiring the relative positioning between the fastener and the insulator to be heeded.