Patent ID: 8240028

Claim:
A mounting head for mounting electronic components to a plurality of mounting places on a board, the mounting head comprising: a frame; a plurality of nozzle units to which a plurality of nozzles are rotatably fitted at lower ends thereof, respectively, and which are provided so as to be movable up/down relative to the frame; a plurality of shaft-type linear motors fixed onto the frame, for moving the individual nozzle units up and down, independently of one another, relative to the frame; a plurality of linear encoders for detecting up/down positions of the individual nozzle units relative to the frame; and a rotating unit for rotationally driving the individual nozzle units, wherein: the shaft-type linear motors are provided vertically upward of the nozzle units, and the linear encoders are provided vertically upward of the shaft-type linear motors, each of the shaft-type linear motors includes a stator fixed to the frame, and a mover slidable up and down relative to the stator, each of the linear encoders includes a movable part connected to the mover of one of the shaft-type linear motors, and a stationary part that detects an up/down position of the movable part, the stationary part being fixed to the frame, and the mounting head further comprises a plurality of restricting members for coupling the shaft-type linear motors and the nozzle units to each other, respectively, and transferring driving force for up/down movement by the shaft-type linear motors to the nozzle units, and restricting rotational-direction movement of the movers of the shaft-type linear motors caused by rotational driving of the nozzle units by the rotating unit thereby restricting rotational-direction moving of the movable parts of the linear encoders.