Lighting device and inspection device with light shield irradiation port configured to irradiate light only on the inspection region
AssigneeKomori Corporation
InventorsYusuke Tsumura, Takeshi Chiba, Osamu Yamamoto
Life of this patent
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Abstract
A lighting device (23) irradiates a web under conveyance with light. The lighting device includes a light source (43), and an irradiation port (61) configured to open linearly in a widthwise direction of the web at an end portion facing the web. The irradiation port (61) is formed between first and second parallel portions (62b, 63b) where a first plate member (62) and a second plate member (63) parallelly face each other. The web under conveyance is irradiated with linear light. It is possible to provide a lighting device capable of irradiating only an inspection region of a sheet or a web with light.
Claims5
A lighting device configured to irradiate an inspection region in one of a sheet and a web under conveyance with light, comprising:
- a light source;
- and
- a light shielding member including an irradiation port which opens linearly,
- wherein the light shielding member includes a first plate member and a second plate member,
- the first plate member and the second plate member include a first parallel portion and a second parallel portion, respectively,
- the first parallel portion and the second parallel portion parallelly face each other, and
- the irradiation port is formed between the first parallel portion and the second parallel portion,
- an opening width of the irradiation port in a direction orthogonal to a widthwise direction of one of the sheet and the web which is narrower than a width of the inspection region in the direction orthogonal to the widthwise direction of one of the sheet and the web, and
- the irradiation port is configured to irradiate a linear region in the inspection region with light, thereby irradiating only the inspection region with the light.
Dependencies are inferred from the claim text.