Aoyama Seisakusho Co., Ltd.

Kenichiro Araki

Kazuhiro Koga

Tsuyoshi Kojima

Keiichiro Masui

Shigeki Matsunami

Dan Kitajima

Yuichi Katsumata

A piercing nut according to the present invention includes an internal thread, a ring-shaped punching part, a ring-shaped groove, and a bearing surface. The internal threadis formed at the center of a nut main body. The ring-shaped punching partprotrudes around the outer periphery of the internal thread. The ring-shaped grooveis formed around the outer periphery of the ring-shaped punching part. The bearing surfaceprotrudes around the outer periphery of the ring-shaped groove. The height h of the ring-shaped punching partis equal to or lower than the height H of the bearing surfacein the opposite manner to the conventional technique.

Piercing nut and method for fixing the same to inner surface of mating member having closed sectional shape

A device for fixing a nut to an inner surface of a pipe member having a small inner diameter is provided. The device includes a unit box () to be inserted into the pipe member, a rotation shaft () extending from the unit box () to the outside of the pipe member, a cam fixed to the rotation shaft () in the unit box (), and a nut holder () that advances from the unit box () toward the inner surface of the pipe member by the rotation of the cam. A pressure receiving member to be abutted on the inner surface of the pipe member is provided on an opposite surface of the nut holder ().

Device and method for fixing nut to inner surface of pipe member

Growing community of inventors

Niwa-Gun, Japan

Kenichiro Araki