JPS5994607U - Synthetic resin board mounting screws - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案に係る一実施例の正面図、第２図ａ及び
ｂは夫々第１図における平面図、第３図は締着状態にお
ける説明図、第４図は他の実施例を示す説明図である。 図面の符号＝１・・・ねじ締着具本体、２・・・ねじ軸
部、３・・・ねじ頭部、５・・・つば部。Fig. 1 is a front view of one embodiment of the present invention, Fig. 2 a and b are plan views of Fig. 1, Fig. 3 is an explanatory diagram of the fastened state, and Fig. 4 shows another embodiment. FIG. Reference numbers in the drawings = 1...Screw fastener body, 2...Screw shaft portion, 3...Screw head, 5...Brim portion.

Claims (1)

【実用新案登録請求の範囲】 １　ねじ山を設けたねじ軸部と、該ねじ軸部上端に設け
られるねじ頭部からなるねじ締着具において、該ねじ頭
部を適宜逆多角錐に形成し、この上面につば部を形設し
たことを特徴とする合成樹脂ボートの取付用ねじ。 ２　ねじ頭部が、その下部をねじ軸部径より若干大径の
環状にアンダーカッ・トぎれ〜たものであることを特徴
とする実用新案登録請求の範囲第１項記載の合成樹脂ボ
ートの取付用ねじ。 ３　多角錐が、各面湾曲形成されたものであることを特
徴とする実用新案登録請求の範囲第１項記載の合成樹脂
ボートの取付用ねじ。[Scope of Claim for Utility Model Registration] 1. A screw fastener consisting of a screw shaft provided with a thread and a screw head provided at the upper end of the screw shaft, in which the screw head is appropriately formed into an inverted polygonal pyramid. , a synthetic resin boat mounting screw characterized by having a flange formed on its upper surface. 2. A synthetic resin boat as set forth in claim 1 of the utility model registration claim, wherein the screw head has an annular undercut with a diameter slightly larger than the diameter of the screw shaft at its lower part. Mounting screws. 3. The screw for attaching a synthetic resin boat according to claim 1, wherein the polygonal pyramid is curved on each side.