SPIRAL TYPE CONVEYING DEVICE

PROBLEM TO BE SOLVED: To improve conveyance performance and to make maintenance easy for a spiral type conveying device.SOLUTION: The problem is solved in this invention by: including a cylindrical member (100) in which a conveyance passage (170) is formed inside; having an interlocking part (118) which interlocks end parts of two spiral axes (40) for conveyance inside the cylindrical member (100); and forming an opening (114) which communicates the conveyance passage (170) and an outside part of the cylindrical part (100), at a portion facing the interlocking part (118) on a side wall of the cylindrical member (100). Also, a lid (125) for blocking the opening (114) is provided. It is preferable to have a configuration in which an auxiliary conveyance passage (172), which becomes a part of the conveyance passage (170), is formed between the inner side surface of the lid (125) and the interlocking part (118), in a state where the lid (125) is mounted on the opening (114).