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US 11,959,863 B2Granted
Sheet inspection device
AssigneeOMRON Corporation
InventorYuto Kawashima
Life of this patent
Estimating the term…
Abstract
Provided is a sheet inspection device capable of saving space, reducing member costs, and reducing the number of maintenance steps. A first light source Ls1 and a first inspection part S1 for inspecting a flaw on the front surface of a sheet and a second light source Ls2 and a second inspection part S2 for inspecting a flaw on the back surface of the sheet are disposed in such a positional relationship that when the sheet has a hole, the first inspection part S1 can detect light emitted by the second light source and transmitted through the hole in the sheet.
Claims3
A sheet inspection device comprising:
- a first light source configured to irradiate a first surface of a sheet-shaped inspection target material;
- a first inspector configured to detect reflected light obtained by the first surface of the inspection target material reflecting the light emitted by the first light source;
- a second light source configured to irradiate a second surface of the inspection target material;
- a second inspector configured to detect reflected light obtained by the second surface of the inspection target material reflecting the light emitted by the second light source;
- and
- a detection determination processor configured to detect and determine a defect of the inspection target material based on a signal input from the first inspector and/or a signal input from the second inspector,
- wherein the first inspector is disposed at a position where, when the inspection target material has a hole, light emitted from the second light source and transmitted through the hole is detectable, and
- the detection determination processor detects and determines the hole as the defect of the inspection target material in a case where the first inspector detects the light emitted from the second light source and transmitted through the hole.
5 more elements
Dependencies are inferred from the claim text.