Aoyama Seisakusho Co., Ltd.

Other

Junzo Ozawa

Shuji Ito

Masafumi Takahashi

Hiromichi Mizuno

Masahito Yabuoshi

Takashi Asakura

Kenji Inagaki

Mitsushige Gotou

A fastener for members (M , M ) to be clamped with a certain spacing therebetween includes a nut ( ); a bolt ( ); and a moveable collar ( ) having in an inner bore thereof a torque transmitting device capable of transmitting torque of the bolt, which is axially inserted into the inner bore, to the movable collar through thread&mdash;thread engagement, and wherein a portion of the thread of the bolt includes special thread ridges ( ), by which a frictional force is imparted to the thread&mdash;thread engagement.

Fastener for clamping members having a certain spacing from each other while maintaining the certain spacing therebetween

The invention relates to a bolt for integrally fastening a first member and a second member, which are spaced away to each other, the bolt comprising a cylindrical-shaped collar bolt provided on a portion of an outer peripheral surface thereof with an external thread portion and on an inner peripheral surface thereof with an internal thread portion; and a bolt body having in an area of one end of a shank an external thread portion capable of threading into the internal thread portion of the collar bolt and a head on the other end thereof.

Bolt, method of fastening members with the use of the bolt, and method of releasing fastening

The invention has been accomplished in order to provide a method of manufacturing a columnar material of metal having an excellent dimensional accuracy without the need of much work time and cost, said method comprising equally forming a multiplicity of longitudinal grooves on an outer periphery of a column-shaped raw material of metal, and then uniformly squeezing tip ends of portions between the respective longitudinal grooves to make the same flat to obtain a target outside dimension.

Method of manufacturing a columnar material

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Aichi, Japan

Junzo Ozawa