The board conveyance device 92 loads, positions, and unloads the board K to, at, and from a mounting position. The board conveyance device 92 includes a conveyance unit 925 and a backup unit 926. The conveyance unit 925 is configured of a pair of guide rails 921 and 922, a pair of conveyor belts, and the like. The pair of guide rails 921 and 922 is assembled on the device table 91 in a parallel manner by crossing over the center of an upper face of the device table 91. The pair of conveyor belts disposed on an inner aide on which the pair of guide rails 921 and 922 faces each other rotates in a state where both edges of the board K are placed on respective belts and loads and unloads the board K to and from the mounting position set at a central portion of the device table 91. The backup unit 926 is disposed below the mounting position and pushes up and clamps the board K with a horizontal posture.

The component supply device 1 is configured of multiple tape feeders 10 arranged on a substantially rectangular pallet member 1A that is attached to and detached from the upper face of the device table 91. Various type or sizes of tape feeders 10 are used, and the consumption current varies depending on the type or size. Here, a type of tape feeder 10 called an auto loading feeder is assumed to be used. The tape feeder 10 is configured of a main body section 11 and two supply reels 18 and 19 disposed on a posterior portion of the main body section 11. The supply reels 18 and 19 wind and hold a carrier tape on which multiple electronic components are taped in a row. The carrier tape is unwound by predetermined pitches, and the electronic components are released from an accommodating state and are sequentially supplied.