JPH02101112U

JPH02101112U -

Info

Publication number: JPH02101112U
Application number: JP901289U
Authority: JP
Priority date: 1989-01-26
Filing date: 1989-01-26
Publication date: 1990-08-13

Description

[Brief explanation of drawings]

第１図は本考案の羽根付きドリルねじの正面図
、第２図は第１図の羽根の部分の拡大斜視図、第
３図は羽根が破砕したところを示す説明図、第４
図は羽根を刻設する打型の拡大斜視図、第５図ａ
，ｂは羽根付きドリルねじの使用例を示す断面図
、第６図は従来の羽根付きドリルねじの正面図、
第７図は従来の打型を示す説明図、第８図は第６
図の羽根の部分の拡大斜視図、第９図は従来の羽
根が破砕したところを示す説明図である。１：頭部、２：工具係合穴、３：ねじ部、４：
ねじ山、５：ドリル部、６：傾斜溝、７：尖端斜
面、８：チゼルエツヂ、９：羽根、９ａ：突出部
、１０：打型、１１：軟質部材、１１：硬質部材
。 Fig. 1 is a front view of the bladed drill screw of the present invention, Fig. 2 is an enlarged perspective view of the blade portion of Fig. 1, Fig. 3 is an explanatory view showing the blade broken, and Fig. 4
The figure is an enlarged perspective view of the die for carving the blades, Figure 5a.
, b is a sectional view showing an example of the use of a bladed drill screw, and FIG. 6 is a front view of a conventional bladed drill screw.
Figure 7 is an explanatory diagram showing the conventional striking mold, and Figure 8 is the 6th one.
FIG. 9 is an enlarged perspective view of the blade portion in the figure, and is an explanatory view showing a conventional blade broken. 1: Head, 2: Tool engagement hole, 3: Threaded part, 4:
Screw thread, 5: drill part, 6: inclined groove, 7: pointed slope, 8: chisel edge, 9: vane, 9a: protruding part, 10: mold, 11: soft member, 11: hard member.

Claims

[Scope of utility model registration request]

Consisting of a head 1 having a tool engagement hole 2, a threaded part 3 having a thread formed on its outer periphery, and a drill part 5 extending from the threaded part 3 at a predetermined distance, 2
In a drill screw used for fastening two or more members to be fastened, a pair of blades 9 symmetrical with respect to the axis are provided between the threaded portion 3 and the drilled portion 5 as a completely flat plate, and the outside of the threaded portion 3 is A bladed drill screw characterized in that it is carved so as to protrude slightly larger than its diameter, and is formed to have such strength that the protruding portion 9a breaks when the blade 9 is pressed against a predetermined position of a member to be fastened.