portion 51 of the open and close member 50 centering around the hinge portion 58 inserting the closing portion 51 the yielding portions 53 and 54 and the contact portion 55 through the clearance between the guide edge 48 and the other side surface 20b of the residual matter discharge sleeve 20 slidably engaging the closing portion 51 with the inner surface of the guide edge 48 while contacting the contact portion 55 with the outer surface of the case 13 and then inserting the spring portion 59 by turning it inwardly centering around the hinge portion 58 into the residual matter discharge sleeve 20 so that one end of the closing portion 51 is contacted with the one side surface 20a of the residual matter discharge sleeve 20 the spring portion 59 is contacted with and held by the other surface 20b and the latching portions 61 of the operating portion 60 are engaged with the engaging concave portion 49 when the rotary member 36 is inserted into the case 13 through the base end opening 21 of the case 13 the lid 25 is engaged with the base end opening 21 so that the rotary shaft 38 is supported by the bearings 27 and 29 the fitting sleeve 32 of the lid 25 is fitted into the clamp case body 62 mounted on the base 1 in the state that the inlet cylinder 14 of the case 13 is faced upwardly the clamp engaging pawl not.