PROBLEM TO BE SOLVED: To improve the production efficiency of an internally threaded float equipped with a fishing line insertion hole having a changing inner diameter.SOLUTION: The internally threaded float is equipped with a float body equipped with a through hole formed from an upper through hole part and a lower through hole part having an inner diameter larger than that of the upper through hole part, a metal member composed of a metal pipe that is made of a metal as a material, provided with the fishing line insertion hole having an inner diameter changing along the direction of fishing line insertion, has an outer diameter corresponding to the upper through hole part and is formed with passing through the through hole of the float body and a float tip metal part that is arranged so as to be inserted into the opening part of the lower through hole part at the lower tip end part of the metal pipe and is separately from or integrally with the metal pipe and a ring type sinker that is inserted into the metal pipe and positioned at the lower through hole part in a state in which the metal pipe is passed through the through hole of the float body.COPYRIGHT: (C)2013,JPO&INPIT【課題】内径が変化する道糸挿通孔を備える中通しウキの製造効率を向上させる。【解決手段】上側貫通孔部とこれより大きい内径の下側貫通孔部とにより形成される貫通孔が形成されたウキ本体と、金属を材料とし、道糸の挿通する方向に沿って内径が変化するように道糸挿通孔が形成されるとともに、上側貫通孔部に対応した外径を有し、ウキ本体の貫通孔を貫通して設けられる金属パイプと、この金属パイプの下側先端部において下側貫通孔部の開口部にはめ込まれるように設けられ、金属パイプと別体または一体に形成されるウキ先端金属部とから成る金属部材と、金属パイプに挿通して設けられ、金属パイプがウキ本体の貫通孔を貫通している状態では下側貫通孔部において位置するリング型重りとを備えて中通しウキを構成する。【選択図】図1
