JPH0486179U

JPH0486179U -

Info

Publication number: JPH0486179U
Application number: JP12990290U
Authority: JP
Priority date: 1990-11-30
Filing date: 1990-11-30
Publication date: 1992-07-27

Description

[Brief explanation of the drawing]

第１図は本考案による打ち込み機のピストン構
造の一実施例の断面図、第２図は同じくピストン
とドライブビツトの結合部の加圧前の状態を示す
部分断面図、第３図は第２図の−線における
断面図、第４図は同じく結合部加圧後の固着状態
を示す部分断面図、第５図は第４図の−線に
おける断面図、第６図、第７図は本考案のそれぞ
れ異なる他の実施例の断面図、第８図は従来の打
ち込み機の全体を示す部分断面をした側面図、第
９図と第１１図は、それぞれ異なる従来技術のピ
ストン構造の断面図、第１０図は第９図の部の
部分断面図である。１……ピストン、２……ドライブビツト、３…
…ねじ、４……環状溝、６……押型、９……打ち
込み機本体、１０……蓄圧室、１３……シリンダ
、１５……止め具。 FIG. 1 is a cross-sectional view of an embodiment of the piston structure of a driving machine according to the present invention, FIG. 4 is a partial sectional view showing the fixed state after pressurizing the joint, FIG. 5 is a sectional view taken along the - line in FIG. 4, and FIGS. 6 and 7 are the main parts. 8 is a partially sectional side view showing the entire conventional driving machine, and FIGS. 9 and 11 are sectional views of different prior art piston structures. , FIG. 10 is a partial cross-sectional view of the portion shown in FIG. 9. 1... Piston, 2... Drive bit, 3...
... Screw, 4 ... Annular groove, 6 ... Pressing mold, 9 ... Driving machine body, 10 ... Pressure accumulator, 13 ... Cylinder, 15 ... Stopper.

Claims

[Claims for Utility Model Registration] A driving machine including a pressure accumulating chamber for storing a compressible fluid, a drive bit for driving a stopper, a piston, and a cylinder on which the piston slides, comprising: A threaded portion is provided in a part of the fitting portion of the piston to constitute a threaded portion, one or more annular grooves are provided in the same direction as the screwing direction of the screw of the drive bit, and the annular groove is provided with the threaded portion. A piston structure for a driving machine, characterized in that a part of the piston is pressed and deformed to prevent the drive bit and the piston from rotating.