PROBLEM TO BE SOLVED: To provide a support post used by inserting into soil in which a conical tip member can be strongly fixed to a hollow rod body, and which can be easily removed when necessary.SOLUTION: There is provided a support post used by inserting into soil in which a convex portion 160 protruded on an inner surface of a hollow rod body is provided, a tip member 106 is constituted of a conical portion 130 and an insertion part 132 inserted into the hollow rod body, a spiral groove is formed in the insertion part 132, the insertion part 132 is screwed into the hollow rod body by allowing the convex portion 160 to be positioned in the spiral groove, rotation of the conical member 130 is regulated by a rotary lock mechanism 190 constituted of at least the convex portion 160 and the tip member 106 to prevent the conical member 130 from falling, and the conical member 130 can be easily removed by turning in an opposite direction.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2017,JPO&INPIT【課題】錐形の先端部材を中空状棒体に強固に固定できかつ必要に応じて容易に取り外すことができる、土壌に挿入して用いる支柱を提供する。【解決手段】中空状棒体の内面において突出する凸部160を設け、先端部材106は錐形部分130と中空状棒体内に挿入される挿入部分132によって構成され、挿入部分132には螺旋状溝が形成され、螺旋状溝に凸部160を位置させることによって挿入部分132を中空状棒体にねじ込み、少なくとも凸部160と先端部材106とで構成される回転ロック機構190によって錐形部材130の回転を規制し錐形部材130の脱落を防止し、錐形部材130は逆向きに回すことにより容易に取り外すことができる土壌に挿入して用いる支柱。【選択図】図9
