PROBLEM TO BE SOLVED: To provide a blade-shaped component structure capable of easily attaching blade plates to both side surfaces of a main body of a crawler lure and reducing the weight. SOLUTION: The blade-shaped plate 3 is composed of a fastener 4, and a rectangular hole 3a long in the vertical direction is formed at a root portion of the blade-shaped plate 3. The fastener 4 is composed of a joint metal fitting 5, a stopper screw 6, and two screws 7. The joint metal fitting 5 has a shape in which both ends of a horizontally long rectangular plate are bent in a semicircular shape, and a screw hole 5a is provided at both ends and a hole 5b through which a stopper screw 6 is passed is provided at the center of the semicircular arc. A cut-up 5c having a width of about 1/3 of the vertical width of the plate is provided between the stopper screw hole 5b and one end of the semicircle, and the cut-up tip is bent toward the outside of the semicircle. The length of the stopper screw shall be longer than the semicircular radial dimension, and the head shall be flat ring-shaped. With the joint metal fitting 5 passed through the rectangular hole 3a of the vane-shaped plate 3, it is attached to the side surface of the lure body with two screws 7, and further, the stopper screw 6 is attached. [Selection diagram] Fig. 2【課題】クローラー系ルアーの本体両側面に羽根板を簡単に取り付けでき、軽量化を図れる羽根状部品構造体を提供する。【解決手段】羽根状板３と留め具４で構成し、羽根状板３の根元部分には縦方向に長い矩形穴３ａを形成する。留め具４はジョイント金具５とストッパー螺子６と２個の螺子７で構成する。ジョイント金具５は横長矩形板の両端部分を残してその間を半円弧状に折り曲げた形状とし、両端部分に螺子穴５ａを、半円弧状の中央部にストッパー螺子６を通す穴５ｂを設ける。ストッパー螺子用穴５ｂと半円弧の一方の端との間に板の縦方向幅の１／３程度幅の切り起こし５ｃを設け、切り起こし先端部を半円弧外側に向けて折り曲げておく。ストッパー螺子の長さは半円弧状の半径寸法より長くし、頭部は扁平リング状とする。羽根状板３の矩形穴３ａにジョイント金具５を通した状態で２個の螺子７にてルアー本体側面に取付け、更にストッパー螺子６を取り付ける。【選択図】図２
