Title:
MULTI-NEEDLE PUSH PIN FOR GYPSUM BOARD
Document Type and Number:
Japanese Patent JP2023046231
Kind Code:
A
Abstract:
To solve the problems that when attaching hangers, a table for placing small items, a picture frame, etc. on a gypsum board, a multi-needle push pin has excellent load resistance in a direction of gravity but a tensile load in a direction perpendicular to a wall surface is not large, so that depending on a force component perpendicular to the wall surface due to inclination of a load in the direction of gravity, the push pin may easily come off, and to provide a push pin capable of improving the load resistance perpendicular to the wall surface and improving its variation even when the push pin is a multi-needle push pin.SOLUTION: All pins 2, 3, 4 have their central axes on an outer peripheral surface of a same cylinder in an insertion direction, and the pins 2, 3, 4 are loosely pitched and have a helical shape. Further, a threaded pin head 1 has a function of generating force for rotating the pin head 1 from force of inserting a multi-needle push pin. A plurality of protrusions or recesses is provided around the pin head 1. The recesses or protrusions generate rotational force on the pin head 1, and engages with helical crests or troughs on a guide side to act as a screw.SELECTED DRAWING: Figure 1
Inventors:
Masanori Konishi
Junichi Kakumoto
Junichi Kakumoto
Application Number:
JP2022081958A
Publication Date:
April 03, 2023
Filing Date:
May 19, 2022
Export Citation:
Assignee:
Junichi Kakumoto
International Classes:
F16B15/00