JPH0321493U

JPH0321493U -

Info

Publication number: JPH0321493U
Application number: JP8047389U
Authority: JP
Priority date: 1989-07-07
Filing date: 1989-07-07
Publication date: 1991-03-04

Description

[Brief explanation of drawings]

第１図乃至第４図は本考案の一実施例を示すも
ので、第１図は掘削ヘツドの正面図、第２図は同
側面図、第３図は第１図の−線に沿う横断上
面図、第４図は杭の埋込み施工の工程を示す図で
ある。また、第５図は拡大部を備えた掘削孔を示
す縦断面図、第６図は従来の掘削ヘツドを一部を
断面にて示す正面図、第７図は他の従来例を示す
第１図相当図である。図面中、１２……掘削ロツド、１３……掘削孔
、１３ａ……拡大部、１４……掘削ヘツド、１５
……シヤフト部、１６……スクリユー羽根、１７
……拡大掘削爪、１８……支持部を示す。 Figures 1 to 4 show one embodiment of the present invention, in which Figure 1 is a front view of the excavation head, Figure 2 is a side view of the same, and Figure 3 is a cross-sectional view taken along the - line in Figure 1. The top view and FIG. 4 are diagrams showing the process of embedding the piles. Further, Fig. 5 is a longitudinal cross-sectional view showing a drilling hole with an enlarged part, Fig. 6 is a front view partially showing a conventional drilling head in cross section, and Fig. 7 is a first cross-sectional view showing another conventional example. It is a figure equivalent figure. In the drawings, 12...Drilling rod, 13...Drilling hole, 13a...Enlarged part, 14...Drilling head, 15
...Shaft part, 16... Screw blade, 17
. . . Enlarged digging claw, 18 . . . Shows the support portion.

Claims

[Scope of utility model registration request]

A screw blade provided at the tip of a drilling rod of a drilling device, and comprising a shaft part connected to the drilling rod and a screw blade spirally provided on the outer periphery of the shaft part, wherein the tip part is rotated when the drilling rod rotates in reverse. An excavation head characterized in that an enlarged excavation claw protruding outward from the screw blade is located within a spiral path of excavated soil formed by the screw blade.