PROBLEM TO BE SOLVED: To provide a boring device capable of performing a lawn excavation work and a ground boring work simultaneously.SOLUTION: A boring device 102 is constituted of a cylindrical body part 110 and a blade 112 formed at one end portion of the body part 110, and at least three cutting parts 130 are formed at the blade 112. Moreover, the aforementioned problem can be solved by constituting said each cutting part 130 by apexes 132 disposed at mutually spaced positions, a trough 133 disposed at mutually spaced positions, and a ridge part 134 formed between the apexes 132 and the trough 133.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】比較的少ない力で芝の根切り作業と地面の穿孔作業とを同時に行うことができる穴あけ器を提供する。【解決手段】穴あけ器102を筒状の本体部110と、本体部110の一方端部に形成された刃112とで構成し、刃112に少なくとも3つの刃部130を形成する。また、当該各刃部130を、互いに離間した位置にある頂部132と、互いに離間した位置にある谷部133と、頂部132および谷部133との間に形成された稜線部134とで構成することにより、上記課題を解決できる。【選択図】図1
