JPS62156613U

JPS62156613U -

Info

Publication number: JPS62156613U
Application number: JP4473886U
Authority: JP
Priority date: 1986-03-28
Filing date: 1986-03-28
Publication date: 1987-10-05
Also published as: JPH0231606Y2

Description

[Brief explanation of drawings]

第１図は、この考案の一実施例セルフタツピン
グねじの側面図、第２図は、第１図のセルフタツ
ピングねじの一部破断拡大斜視図、第３図は、第
２図の―線による一部破断断面図、第４図は
、この考案の他の実施例の第２図と同様の断面図
、第５図は、この考案のさらに別の実施例の第２
図と同様の断面図、第６図は、従来のセルフタツ
ピングねじの使用状態を示す一部破断分解断面図
である。〔符号の説明〕、１…セルフタツピングねじ、
２…頭部、３…軸部、７…ねじ部、８…第１フラ
ンク部、９…第２フランク部、１０…圧力側フラ
ンク面、１１…遊び側フランク面、１２…陥没フ
ランク面、１３…凹部、１４…つるまき線、１５
…山頂部、１６…底縁部。 Fig. 1 is a side view of a self-tapping screw according to an embodiment of the invention, Fig. 2 is a partially cutaway enlarged perspective view of the self-tapping screw of Fig. 1, and Fig. 3 is a side view of the self-tapping screw of Fig. 2. 4 is a sectional view similar to FIG. 2 of another embodiment of this invention, and FIG. 5 is a sectional view of still another embodiment of this invention.
FIG. 6, which is a sectional view similar to the figure, is a partially broken exploded sectional view showing a conventional self-tapping screw in use. [Explanation of symbols], 1...Self-tapping screw,
2... Head, 3... Shaft, 7... Threaded part, 8... First flank, 9... Second flank, 10... Pressure side flank surface, 11... Play side flank surface, 12... Recessed flank surface, 13 ... recess, 14... spiral wire, 15
...Top of the mountain, 16...Bottom edge.

Claims

[Scope of Claim for Utility Model Registration] 1. A self-tapping screw having a head and a shaft continuous to the head, with a threaded portion formed on the shaft, the free side flank surface of the threaded portion having a Recesses extending in a direction that intersects the lead angle of the screw are formed at equal intervals along the thread direction, and the threaded portion is connected to a second flank portion in which the recesses are formed and a first flank portion between the second flank portions. A self-tapping screw characterized by being divided into a flank portion and a flank portion. 2. The concave portion of the second flank portion is formed by a recessed flank surface disposed closer to the pressure side flank surface by a dimension smaller than the play side flank surface. self-tapping screws. 3. The self-tapping screw according to claim 2, wherein the recessed flank surface is arranged parallel to the play side flank surface. 4. The crest of the second flank part is made common to the crest of the first flank part, and the intersection angle of the depressed flank surface and the pressure side flank surface is smaller than the thread angle of the first flank part. 3. A self-tapping screw according to claim 2, characterized in that the recess is provided by forming a self-tapping screw. 5 The bottom edge of the second flank portion is made common to the bottom edge of the first flank portion, and the intersection angle of the depressed flank surface and the pressure side flank surface is set to be greater than the thread angle of the first flank portion. 3. The self-tapping screw according to claim 2, wherein the recess is provided with a larger diameter. 6 The length of the second flank portion in the thread direction is 16 or less of the length of one lead of the thread, and
The self-tapping screw according to claim 1, 2, 3, 4, or 5, characterized in that at least two screws are provided per lead.