JPH01104302U

JPH01104302U -

Info

Publication number: JPH01104302U
Application number: JP20012387U
Authority: JP
Priority date: 1987-12-31
Filing date: 1987-12-31
Publication date: 1989-07-13

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例の全体を示す断面
正面図、第２図は穿孔の状態を示す断面正面図、
第３図はドリル軸とはす歯ギヤとの関係を示す断
面正面図、第４図は第３図のＡ―Ａ断面図、第５
図はチヤツク固定部を示す断面正面図である。１……支持部材、２，３ａ……ガイド孔、３…
…ドリル駆動体、４……はす歯ギヤ、５……ドリ
ル軸、５ａ……スパイラル溝、８……ドリル、１
０……被穿孔物。 Fig. 1 is a cross-sectional front view showing the entire embodiment of this invention, Fig. 2 is a cross-sectional front view showing the state of the perforation,
Figure 3 is a cross-sectional front view showing the relationship between the drill shaft and the helical gear, Figure 4 is a cross-sectional view taken along line AA in Figure 3, and Figure 5 is a cross-sectional view showing the relationship between the drill shaft and the helical gear.
The figure is a sectional front view showing the chuck fixing part. 1... Support member, 2, 3a... Guide hole, 3...
... Drill drive body, 4 ... Helical gear, 5 ... Drill shaft, 5a ... Spiral groove, 8 ... Drill, 1
0...Object to be perforated.

Claims

[Scope of utility model registration request]

a support member whose bottom surface is stably placed on the object to be drilled;
A drill drive body that is supported by the support member so as to be movable up and down and has a grasping portion at the upper end; a drill shaft that is attached to the drill drive body so as to be movable up and down and rotatable and has a spiral groove on the circumferential surface; a drill attached to the lower end by a chuck; a helical gear meshing with the spiral groove of the drill shaft and fixed to the drill driver; and a space between the drill shaft and the drill driver and the supporting member. A hand drill characterized by comprising a compression spring interposed between a drill driving body and a compression spring.