Title:
BORING DEPTH REGULATION STOPPER
Document Type and Number:
Japanese Patent JP2018062165
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a stopper for regulation of a hole depth used for a work for boring a hole, in which a spawn block and a forming bacteria for a raw wood is implanted in shiitake mushroom cultivation, by an electric drill, in which a drill is not rotated by a reaction due to biting of a gimlet, and a screw part to be fitted to the electric drill is not broken.SOLUTION: A body shape 2 of a stopper is so made as to be a frame shape of a frame over a rotation axis so as not to receive a biased load, thereby preventing breakage of a screw part. Further, a tip of the stopper is provided with a spring 3 which is moderately repelled from a force advancing by cutting of a gimlet 6 and a pressing hand force, and a contact face 10 of the stopper is so made as to be projected from the conventional whole circumferential surface and to have a spike effect, thereby preventing a drill 1 from rotation. The spring 3 causes the gimlet 6 to act in a drawn direction by a repulsive force of the spring 3 after the gimlet 6 advances to the stopper 2 and slips, and therefore, can achieve improvement of a work.SELECTED DRAWING: Figure 1
Inventors:
ISHIHARA KAZUMI
Application Number:
JP2016213743A
Publication Date:
April 19, 2018
Filing Date:
October 13, 2016
Export Citation:
Assignee:
ISHIHARA SYSTEM KK
International Classes:
B27C3/08; A01G18/55; B23B47/18