NAIL

Japanese Patent JP2021156332

A

To provide a nail which is hard to come out of an object.SOLUTION: A nail includes a nail head part, and a nail shaft part having two shafts arranging in left and right directions being one direction. The nail head part has flush upper surface and lower surface, respectively. Each shaft has a body part and a tip end, and is set very closely vertically from the nail head part. The body part of each shaft has a shape in which a portion of a column has a flat part vertical to the nail head part, and the flat part faces each other. The tip end of each shaft has a sharp form comprising three planes. The sharp form is configured such that an elongated triangular pyramid shape is inclined to a predetermined direction while one of the vertex of the elongated triangular pyramid shape is coincident with the one of the ends of a lateral direction diameter of the body part from a position where a longitudinal central axis line of the elongated triangular pyramid shape is coincident with an axis line passing the center of the longitudinal diameter being the other direction of the body part in the longitudinal direction of the body part. The predetermined direction is the direction where an angle formed by the edge line of the elongated triangular pyramid shape including the vertex and the normal including the end is increased, and the angular degree of the angle is incremented by a predetermined angular degree by the inclination.SELECTED DRAWING: Figure 1

HONGO MICHIO

JP2020055553A

October 07, 2021

March 26, 2020

Click for automatic bibliography generation  

TSUCHIDA SEISAKUSHO KK

F16B15/04

JPS56141413A	1981-11-05
JP2001059507A	2001-03-06
JPS54136474U	1979-09-21
JPS62124304A	1987-06-05
JP2003226097A	2003-08-12
JPH0285705U	1990-07-05

Patent Service Corporation Miyata Patent Office

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