Ihi Corporation

Kiyofumi Fujimura

Toshihiro Hayashi

Norimasa Taga

Michiko Baba

Kouzou Hasegawa

An inner diameter measuring device for measuring a shape of an inner surface of a cylindrical member, comprising an image pickup unit () disposed on a base end side of a frame unit () and for picking up an image of a forward end side, a cone mirror unit () provided on a forward end side of the frame unit and having a cone mirror () with a conical reflection surface at a forward end, and a laser beam emitting unit () for emitting a laser beam () toward a forward end of the cone mirror, wherein the cone mirror unit can be replaced by another cone mirror unit having a cone mirror with a different vertical angle to suit measuring condition.

Inner diameter measuring device

An inner diameter measuring device, comprising an image pickup unit () provided at a base end of a frame unit () and for picking up an image of a forward end side, a centering unit () provided at a forward end of the frame unit, a laser beam diffusing unit () provided on the centering unit and at a forward end side of the centering unit via a light transmitting window, a laser beam emitting unit () provided on a base end side of the centering unit, and a cone mirror () provided on the laser beam diffusing unit and having a conical reflection surface at a forward end, wherein a center line of the cone mirror coincides with an optical axis of the image pickup unit, and the centering unit is adapted to adjust a posture of the image pickup unit so that a laser beam () projected from the laser beam emitting unit enters a vertex of the cone mirror.

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Tokyo, Japan

Kiyofumi Fujimura