JPS62174111U

JPS62174111U -

Info

Publication number: JPS62174111U
Application number: JP6229586U
Authority: JP
Priority date: 1986-04-24
Filing date: 1986-04-24
Publication date: 1987-11-05
Also published as: JPH0231608Y2

Description

[Brief explanation of the drawing]

第１図〜第７図は本考案の実施例ドリルねじを
示し、第１図はドリルねじ全体の正面図、第２図
は第１図の左側面図、第３図は第１図のドリルね
じにおけるドリル部の拡大図、第４図は第３図の
左側面図、第５図は第３図の底面図、第６図は第
５図の―視側面図、第７図は第１図のドリル
ねじにおけるドリル部の拡大斜視図、第８図はド
リル部における縦溝を切削加工している状態を示
す斜視図、第９図〜第１２図は従来のドリルねじ
におけるドリル部の拡大図を示し、第９図は正面
図、第１０図は第９図の左側面図、第１１図は第
９図の底面図、第１２図は第１１図の―
視側面図である。１０……ドリルねじ、１１……ねじ山、１２…
…シヤンク、１３……頭部、１４……ドリル部、
１５……傾斜端面、１６……長手軸線、１７……
縦溝、１７ａ……第１溝面、１７ｂ……第２溝面
、１８……仮想平面、１９……先端刃、２０……
チゼルエツジ、２１……交点、２３……隅肉部、
２２……隅肉部の傾斜面。 Figures 1 to 7 show a drill screw according to an embodiment of the present invention, Figure 1 is a front view of the entire drill screw, Figure 2 is a left side view of Figure 1, and Figure 3 is the drill of Figure 1. An enlarged view of the drill part in the screw, Figure 4 is the left side view of Figure 3, Figure 5 is the bottom view of Figure 3, Figure 6 is the side view of Figure 5, and Figure 7 is the side view of Figure 1. Figure 8 is an enlarged perspective view of the drill part of the drill screw shown in Figure 8. Figure 8 is a perspective view showing the vertical groove being cut in the drill part. Figures 9 to 12 are enlarged views of the drill part of the conventional drill screw. Fig. 9 is a front view, Fig. 10 is a left side view of Fig. 9, Fig. 11 is a bottom view of Fig. 9, and Fig. 12 is a - of Fig. 11.
FIG. 10...Drill screw, 11...Screw thread, 12...
...shank, 13...head, 14...drill part,
15... Inclined end surface, 16... Longitudinal axis, 17...
Vertical groove, 17a...First groove surface, 17b...Second groove surface, 18...Virtual plane, 19...Tip edge, 20...
Chisel edge, 21...intersection, 23...fillet,
22...Slanted surface of fillet part.

Claims

[Scope of utility model registration request]

A shank having a thread on the outer periphery, a head integrally formed at the upper end of the shank, and a drill part integrally formed at the lower end of the shank, the drill part having a pair of left and right inclined end surfaces. are formed so that both of the inclined end surfaces intersect with each other at a position that coincides with the longitudinal axis of the drill part,
In the drill part, two vertical grooves extending upward from both the inclined end surfaces are cut at diagonal positions, and the first groove surface of the first groove surface and the second groove surface forming the both vertical grooves is formed on the drill part. and the inclined end surfaces are intersected on both sides of a virtual plane that includes the longitudinal axis and is inclined at an appropriate angle with respect to the intersecting ridge line of both the inclined end surfaces, thereby forming a tip blade at the intersection point, Further, in a drill screw in which a portion of the intersecting ridge line between the two inclined end faces is configured as a chisel edge between the two tip edges, a corner where the first groove surface and the second groove surface intersect in the both longitudinal grooves is provided. A drill screw characterized in that a fillet portion is provided in the portion thereof so as to gradually swell toward the second groove surface from the intersection point where the chisel edge intersects with the tip blade or the vicinity of this intersection point.