Importance

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Abstract

In an inspection device for inspecting front and back surfaces of a strip material rolled by a rolling machine, both ends of the strip material along a longitudinal direction of the strip material are claimed by two pairs of clamping devices and the front surface of the back surface of the strip material is pressed at an optional position between the two pairs of the clamping devices by at least one pressing device. Thus, after clamping the strip material, the two pairs of the clamping devices are not displaced along the longitudinal direction of the strip material. A function for applying tensile stress to the strip material and a function for clamping the strip material are individually and separately provided so that the inspection device can be simplified. By pressing the strip material at a point between the two pairs of the clamping devices, at least one of pressing devices can be down sized. It is superior in view of an economical reason. It is possible to set tensile stress at high accuracy and minimize tensile stress variation with respect to a tensile stress level previously set in an operation for inspecting front and back surfaces of the strip material. Therefore, it can be reduced a risk that the strip material is broken and it can be provide a safety inspection device with high reliability for inspecting front and back surfaces of the strip material. Further, it is possible to provide an inspection device for inspecting front and back surfaces wherein a warp of the strip material along a width direction thereof can be adjusted and wrinkles occurred on the strip material by clamping with the clamping devices are controlled.

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First Claim