Abstract: A pre-array temporary placement area A2 and a post-return temporary placement area A3 are set along with a lower receiving area A1. Temporary placement positions TP for lower receiving pins 22 in the pre-array temporary placement area A2 and the post-return temporary placement area A3 are previously assigned in consideration of requirements for preventing occurrence of interference between the lower receiving pins 22, which would otherwise occur during transfer of the lower receiving pins 22, and in accordance with array positions AP of the lower receiving pins 22 in the lower receiving area A1. Further, a transfer sequence is set in accordance with array positions AP.

Abstract: In a palette movement in which a palette (24) which holds a tray (6) whose components are used up is moved from a palette carrying part (27) where the palette (24) was carried for the exchange with a new tray (6) to a palette accommodating part (23), the accommodating address of the return destination is specified based on a readout result of a palette identification mark of a palette information readout sensor (32) and palette accommodating data which are stored in advance. Therefore, even if the components in two or more palettes (24) are used up in the same period, the palettes (24) can be returned to the palette accommodating parts (23) corresponding to the specified accommodating addresses of the return destinations.

Abstract: A pre-array temporary placement area A2 and a post-return temporary placement area A3 are set along with a lower receiving area A1. Temporary placement positions TP for lower receiving pins 22 in the pre-array temporary placement area A2 and the post-return temporary placement area A3 are previously assigned in consideration of requirements for preventing occurrence of interference between the lower receiving pins 22, which would otherwise occur during transfer of the lower receiving pins 22, and in accordance with array positions AP of the lower receiving pins 22 in the lower receiving area A1. Further, a transfer sequence is set in accordance with array positions AP.

Abstract: In a palette movement in which a palette (24) which holds a tray (6) whose components are used up is moved from a palette carrying part (27) where the palette (24) was carried for the exchange with a new tray (6) to a palette accommodating part (23), the accommodating address of the return destination is specified based on a readout result of a palette identification mark of a palette information readout sensor (32) and palette accommodating data which are stored in advance. Therefore, even if the components in two or more palettes (24) are used up in the same period, the palettes (24) can be returned to the palette accommodating parts (23) corresponding to the specified accommodating addresses of the return destinations.