Abstract: An electrophotographic photoreceptor includes a conductive substrate, and a lamination type photosensitive layer disposed on the conductive substrate and including a charge generation layer and a charge transport layer, in which the charge transport layer contains a charge transport material, at least one of a polyester resin (PEz) or a polycarbonate resin (PCz) that has at least one of a structure (Z1) represented by Formula (Z1) or a structure (Z2) represented by Formula (Z2) at at least one terminal, and a resin (X) that has at least one of a unit (X1) represented by Formula (X1) or a unit (X2) represented by Formula (X2), a mass proportion of the resin (X) in a total amount of the polyester resin (PEz), the polycarbonate resin (PCz), and the resin (X) in the charge transport layer is 0.

Abstract: A seismic isolator wherein vibrating units 5 arranged in a multiplex manner are formed of suspension members 53 constituting tensile force bearing members, and frames 51 and bases 52 to which both end portions of the suspension members are joined, adjacent vibrating units 5, 5 being joined together by diagonal members 6 of wire rods constituting compressive force bearing members, whereby the area occupied by the seismic isolator decreases.