Patent ID: 8393087

Claim:
A dimension measuring device for a long material, comprising: an end face following mechanism which butts against the end face in the longitudinal direction of the long material; a dimension measuring mechanism which is connected to the end face following mechanism to measure the dimension of the long material; and a pushingly moving mechanism for pushingly moving the end face following mechanism toward the end face in the longitudinal direction of the long material, wherein the end face following mechanism includes a plurality of (three or more) contact sensors, which are arranged along one plane to detect a contact state, on the side where the end face following mechanism butts against the end face in the longitudinal direction of the long material, and is turnable around at least two axes intersecting at right angles with the direction normal to the plane and intersecting at right angles with each other; the pushingly moving mechanism pushingly moves the end face following mechanism into the state in which at least three contact sensors of the plurality of contact sensors detect that the end face following mechanism butts against the end face in the longitudinal direction of the long material; and the dimension measuring mechanism is pushingly moved integrally and is turnable integrally with the end face following mechanism, and measures the dimension of the long material when it is detected, by at least three contact sensors of the plurality of contact sensors, that the end face following mechanism butts against the end face in the longitudinal direction of the long material.