JPH0370802U

JPH0370802U -

Info

Publication number: JPH0370802U
Application number: JP12927189U
Authority: JP
Priority date: 1989-11-07
Filing date: 1989-11-07
Publication date: 1991-07-17
Anticipated expiration: 2004-11-02
Also published as: JPH0641681Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例において、プラグが
装着された状態を示す縦断側面図、第２図は同じ
くプランジヤとカムリングとの関係を示す平面図
、第３図は同じくプラグが離脱できる状態を示す
縦断側面図である。第４図および第５図は、いず
れも上記実施例におけるカムリングの取付方法を
例示する図である。第６図は上記実施例の装置に
よる鋼管穿孔状況を示す図である。第７図は、本
考案の他の実施例においてプラグが装着された状
態を示す縦断面図である。第８図および第９図は
、従来提案されているプラグ着脱装置の一例の互
いに異なる状態を示す縦断面図、第１０図および
第１１図は、同じく従来の他の例の互いに異なる
状態を示す縦断面図である。１……バー、２……キヤツプ、３……挿通孔、
４……プランジヤ、５……係止ボール、６ａ……
大径部、６ｂ……小径部、８……ストツパピン、
９……操作孔、１０……プラグ、１１……係止凹
部、１２……圧縮ばね、１６……バー、１７……
スリーブ１８……芯部材、１９……プラグ取付穴
、２０……通し孔、２１……鋼球、２２……コイ
ルばね、２３……スライド部材、２４……凸部、
２５……プラグアタツチメント、２６……嵌着溝
、２７……プラグ、２８……搬送ロール、３１…
…カムリング、３２……カム溝、３３……組立用
溝、３４……ピン、３５……カムフオロア、３６
……ガイドピン、３７……先端金具、３８……ガ
イド孔、３９……プランジヤ、４０……長さ調整
リング、４１……皿ばね、４２……ナツト、４３
……ビレツト、４４……コイルばね、４５……ニ
ツプロール。 Fig. 1 is a longitudinal cross-sectional side view showing an embodiment of the present invention with a plug attached, Fig. 2 is a plan view showing the relationship between the plunger and the cam ring, and Fig. 3 is a state in which the plug can be removed. FIG. 4 and 5 are diagrams illustrating a method of attaching the cam ring in the above embodiment. FIG. 6 is a diagram showing the state of steel pipe drilling by the apparatus of the above embodiment. FIG. 7 is a longitudinal sectional view showing a state in which a plug is attached in another embodiment of the present invention. 8 and 9 are vertical cross-sectional views showing different states of an example of a conventionally proposed plug attachment/detachment device, and FIGS. 10 and 11 show different states of another conventional example. FIG. 1...bar, 2...cap, 3...insertion hole,
4... Plunger, 5... Locking ball, 6a...
Large diameter part, 6b... Small diameter part, 8... Stopper pin,
9... Operation hole, 10... Plug, 11... Locking recess, 12... Compression spring, 16... Bar, 17...
Sleeve 18... Core member, 19... Plug mounting hole, 20... Through hole, 21... Steel ball, 22... Coil spring, 23... Slide member, 24... Convex portion,
25...Plug attachment, 26...Fitting groove, 27...Plug, 28...Transport roll, 31...
...Cam ring, 32 ... Cam groove, 33 ... Assembly groove, 34 ... Pin, 35 ... Cam follower, 36
... Guide pin, 37 ... Tip metal fitting, 38 ... Guide hole, 39 ... Plunger, 40 ... Length adjustment ring, 41 ... Disc spring, 42 ... Nut, 43
...Billet, 44...Coil spring, 45...Nipprol.

Claims

[Scope of utility model registration request]

A cylindrical tip fitting that is fixed to the tip of the bar and into which a plug can be attached and removed; a plunger that can slide in the axial direction within the tip fitting and has a small diameter portion at the tip; A plurality of locking balls are fitted to be movable in the radial direction and have a diameter larger than the thickness of the tip of the tip fitting, and a plurality of locking balls are fixed to the side surface of the plunger and are bored in the side wall of the tip fitting along the axial direction. A guide pin that can slide in the guide hole, and a cam that can rotate in the circumferential direction along the outer surface of the tip metal fitting and into which the tip of the guide pin is inserted into the inner surface at an angle in the axial and circumferential directions. A plug attachment/detachment device comprising: a cam ring having a groove;