A retainer member has a retainer portion, a through hole, and non-circular cross section. A bearing section is disposed on an outer periphery of the retainer portion. The through hole has a circular axial cross section and an inner periphery, which is axially penetrated by a non-circular portion of a spool shaft from back to front. The non-circular cross-sectional portion is formed by cutting out a front end of the retainer portion by machining. The non-circular cross-sectional portion has a non-circular axial cross section that engages the non-circular portion of the spool shaft.對於紡車式捲線器的捲筒,可容易且確實地防止保持構件的遊動。保持構件(70),具有:第1保持部(72)、及第2保持部(73)、及設在第1保持部(72)及第2保持部(73)之間的圓板部(71)、及捲筒軸(15)的非圓形部(15b)可朝軸方向貫通內周部的貫通孔(74)、及在第1保持部(72)的前端部藉由朝徑方向貫通的方式切削加工而被切除使捲筒軸(15)的非圓形部(15b)可卡合地使軸方向剖面形成非圓形的非圓形剖面部(77)。非圓形剖面部(77),是使相面對的2面成為平行的方式藉由銑削加工使第1保持部(72)的前端部被切除而形成。70...保持構件71...圓板部72...第1保持部73...第2保持部74...貫通孔76...貫通孔77...非圓形剖面部
