PROBLEM TO BE SOLVED: To reduce the vertical direction dimension of the inner peripheral surface of the through-hole of a funnel holding base to which the foot part of a funnel is to be inserted without damaging the holding stability of the funnel.SOLUTION: On the funnel holding base 2, the through-hole 20 to which the foot part of the funnel is to be inserted is formed. On the inner peripheral surface of the through-hole, a plurality of projection parts 22 and a plurality of recessed parts 26 are alternatively formed at equal angular intervals to the center axis 21 of the through-hole respectively.COPYRIGHT: (C)2010,JPO&INPIT【課題】漏斗の保持安定性を損なうことなく、漏斗の足部が挿入される漏斗保持台の貫通穴の内周面の上下方向寸法を小さくする。【解決手段】漏斗保持台2に漏斗の足部が挿入される貫通穴20が形成されている。貫通穴の内周面には、複数の凸部22及び複数の凹部26が、それぞれ貫通穴の中心軸21に対して等角度間隔で交互に形成されている。【選択図】図2
