PROBLEM TO BE SOLVED: To address the problem of maintaining the driving directionality of a U-pin pile with a holding jig without breaking the U-pin pile, and to allow efficient driving of the U-pin pile safely, simply, swiftly and accurately while self-supported perpendicularly to the ground surface with a worker standing in a relaxed posture.SOLUTION: In order to insert a U-pin pile 6 into the side face of an elliptical cylindrical member 1 from the side, "fig. 1" in the longitudinal direction, an insertion port 2 is provided to extend widely as a slit or semi-cylindrical shape 2a, a rod member 3 with a stroke length is provided with a grip 4 attached to the top part of the rod member 3 and a recess provided along a bend R of a pile head of the U-pin pile at the bottom part of the rod member, and a weight 5 for hitting is installed and formed integrally. The rod member 3 is designed to fit freely into the bore of the elliptical cylindrical member 1 and the grip 4 is held by hand and pulled up to the upper part of the insertion hole 2 during use. The U-pin pile 6 can easily be driven as shown in "fig. 1" by vertically moving the grip 4 after insertion into the insertion hole 2 from the side and lowering the grip 4.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】 解決しようとする課題は、Uピン杭を保持具によって打つ方向性を持たせ、Uピン杭を壊すことなく、地面に垂直に自立させ、作業員が立ったまま楽な姿勢で安全、且つ、簡単、迅速、的確にUピン杭を効率的に打つことが出来るようにする。【解決手段】 楕円筒形状部材1の側面にUピン杭6を横から挿入できるように、「図1」長手方向に挿入口2をスリット状又は半円筒状2aのように幅広く設ける、ストローク長を持った桿材3を設け、その桿材3上部にはグリップ4を取り付けてあり、下部にはUピン杭頭の曲がりRに沿った凹みを設け、衝打する重り5を装着して一体となっている、桿材3は楕円筒形状部材1の内径に自在に遊嵌するようになっている、使用時にはグリップ4を手で持ち挿入口2上部にまで引上げ、Uピン杭6を「図1」のように、挿入口2の横から挿入しグリップ4を下げてグリップ4を上下動させることで容易に打ち込み出来る。【選択図】 図1
