HOUSING CASE FOR MULTIPLE OPTICAL AXIS PHOTOELECTRIC SWITCH

PROBLEM TO BE SOLVED: To provide a housing case for a multiple optical axis photoelectric switch, having sure water resistance even in the multiple optical axis photoelectric switch composed of a projector and a light receiver having any length. SOLUTION: A housing case for a multiple optical axis photoelectric switch is constituted of a housing case 2 and cover members 6 and 7. Plural units 12, for arranging photoelectric elements, composed of projecting elements or light receiving elements, in a frame 12, are housed in the housing case 2. Windows 21 and 22 are formed, so that the flood light of the housed photoelectric elements or light to be received can pass, on the surface, which is one surface of the hollow square column of the housing case 2, also a surface at the front of the photoelectric element in a housing condition. The cover members 6 and 7, composed of transparent resin, a fixed to the housing case 2 by adhesive, etc., so as to cover the windows 21 and 22 respectively.