JPS594811U

JPS594811U - detent screw

Info

Publication number: JPS594811U
Application number: JP9952282U
Authority: JP
Inventors: 福林　憲司
Original assignee: 日東精工株式会社
Priority date: 1982-06-30
Filing date: 1982-06-30
Publication date: 1984-01-12

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

[Brief explanation of the drawing]

第１図は従来例の正面図、第２図は第１図のＡ−Ａ線に
沿った要部拡大断面図、第３図は本考案の正面図、第４
図は第３図のＢ−Ｂ線に沿った要部拡大断面図、第５図
は第３図の使用状態を示す一部断面正面図、第６図は第
５図のＣの要部拡大断面図である。１・・・頭部、２・・・溝、３・・：ねじ軸心、４・・
・おじ山、５−・・・平ら部、６・・・突起、７・・・
頭部首下、８・・・ねじ部、９・・・ストレート部、１
０・・・ねじ山外径の逓減部、１１・・・第１面、１２
・・・第２面、１３・・・頂点、１４・・・被締結物、
１５・・・相手材、１６・・・下穴、１７・・・雌ねじ
、１Ｂ・・・十字穴、１９・・・ねじ部先端、２０・・
・戻り止めねじ、２１・・・盛上がり部分。Fig. 1 is a front view of the conventional example, Fig. 2 is an enlarged sectional view of the main part along line A-A in Fig. 1, Fig. 3 is a front view of the present invention, and Fig. 4 is a front view of the conventional example.
The figure is an enlarged sectional view of the main part taken along the line B-B in Fig. 3, Fig. 5 is a partially sectional front view showing the usage condition of Fig. 3, and Fig. 6 is an enlarged view of the main part of C in Fig. 5. FIG. 1... Head, 2... Groove, 3...: Screw axis center, 4...
・Ojiyama, 5-... Flat part, 6... Protrusion, 7...
Below the head and neck, 8...Threaded part, 9...Straight part, 1
0... Decreasing portion of thread outer diameter, 11... First surface, 12
... second surface, 13 ... apex, 14 ... object to be fastened,
15...Mating material, 16...Prepared hole, 17...Female thread, 1B...Cross recess, 19...Threaded part tip, 20...
・Reset screw, 21...raised part.

Claims

[Scope of utility model registration request]

(1) It consists of a head 1 having a drive mechanism, a threaded part 8 having a straight part 9 and a part 10 with a decreasing thread outer diameter, and a flat part 5 between the threads 4 of the threaded part 8. In the set screw, the cross-sectional shape of the threaded portion 8 is non-circular, the screw thread 4 has a thread angle of 40° to 50°, and the screw head and neck are substantially parallel to the screw axis 3. A detent screw characterized in that a plurality of protrusions 6 protruding from the diameter of the flat part 5 are provided at equal intervals on the outer peripheral surface of the flat part 5 from 7 to the threaded part tip 19.

(2) Position the apex 13 of the protrusion 6 at 17
2 or less, and the angle of the first surface 11 is 45 degrees or more with respect to the vertical plane from the ridgeline of the protrusion 6 to the screw axis 3, and the angle of the second surface 1 is
2 is 45 degrees or less, and the first surface 11 is formed into a gently curved surface.