Aoyama Seisakusho Co., Ltd.

Toshiya Mori

Yukinori Fujimoto

Hideki Kakamu

Naoki Hoshino

There are provided a bolt caulking method and a bolt caulking device which ensure supply and caulking of a bolt as a single operation. The method is a bolt caulking method including supplying a bolt into a nose piece having a vertical hole, and lowering a punch from above to drive the bolt into a metal plate. The bolt is supplied through a pipe connected to a side of the nose piece, and dropped into a vertical hole formed in the nose piece along an inclined hole formed at a tip end of the pipe with a head part of the bolt being located on the topside. Thereafter, the punch which ejects air from a central hole is lowered within the vertical hole to drive the bolt into a metal plate while holding the bolt at a lower part of the vertical hole by the ejecting air flow.

Bolt caulking method and bolt caulking device

The invention relates to a spool valve having an inner hybrid construction and a method of manufacturing the same, and the spool valve comprising sliding surface portions and grooves, the sliding surface portions and the grooves being arranged alternately adjacent to each other in a longitudinal direction of the spool valve, the sliding surface portions being formed by sliding members, which are provided on a base portion of a synthetic resin to be fitted thereon.

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Niwa-gun, Japan

Toshiya Mori