so as to be rotatable with respect to the main plate 102 and the pallet bridge 164 that is an upper shaft portion 142 a of the pallet fork 142 is supported so as to be rotatable with respect to a pallet bridge 164 a lower shaft portion 142 b of the pallet fork 142 is supported so as to be rotatable with respect to the main plate 102 lubricating oil is applied to a bearing portion of the barrel bridge 160 rotatably supporting the upper shaft portion 120 a of the barrel arbor 120 f to a bearing portion of the train wheel bridge 162 rotatably supporting the upper shaft portion 124 a of the center wheel amp pinion 124 to a bearing portion of the train wheel bridge 162 rotatably supporting the upper shaft portion 126 a of the third wheel amp pinion 126 to a bearing portion of the train wheel bridge 162 rotatably supporting the upper shaft portion 128 a of the second wheel amp pinion 128 to a bearing portion of the train wheel bridge 162 rotatably supporting the upper shaft portion 130 a of the escape wheel amp pinion 130 and to a bearing portion of the pallet bridge 164 rotatably supporting the upper shaft portion 142 a of the pallet fork 142 further lubricating oil is applied to a bearing portion of the main plate 102 rotatably supporting the lower shaft portion 120.