/scoreboard objectives add DropItem dummy

-クロック-
/execute @a ~ ~ ~ /scoreboard players set @e[r=3,type=Item] DropItem 1 {PickupDelay:40s,OnGround:0b,Age:0s}
/entitydata @e[type=Item,score_DropItem_min=1] {PickupDelay:0s,Invulnerable:1b,Motion:[0d,0d,0d]}