A refrigerated shelf unit comprising: a refrigerated shelf unit housing and a plurality of shelves arranged therein in a stair-like manner, the refrigerated shelf unit housing being provided with an access opening whose opening plane is inclined by at least 10° to at most 70° with respect to a vertical plane, a night time cover assembly configured to close the access opening, the night time cover assembly comprising: a roller blind cylinder associated with an upper edge of the access opening and being fastened to the refrigerated shelf unit housing, a flexible insulating film (48, 48') comprising an upper end which is fixed to the roller blind cylinder, wherein, when the assembly is in an open state, the flexible insulating film is rolled on the roller blind cylinder and, when the assembly is in a closed state, the flexible insulating film is rolled off the roller blind cylinder so as to be spanned in the access opening, a horizontal tensioning rail arranged at the lower end of the insulating film (48, 48'), at least one pivot arm (44, 44') whose upper longitudinal end is hinged at a housing-side pivot hinge and whose lower longitudinal end is hinged at a tensioning rail-side holding hinge 52), wherein the hinges (50, 52) are inclined so that a pivot plane of the pivot arm (44, 44') corresponds to the opening plane and is inclined by at least 10° to at most 70° with respect to the vertical plane, characterized in that the pivot arm (44, 44') is provided as a telescopic arm and comprises at least two telescopable telescopic bars (56, 58). a refrigerated shelf unit housing and a plurality of shelves arranged therein in a stair-like manner, the refrigerated shelf unit housing being provided with an access opening whose opening plane is inclined by at least 10° to at most 70° with respect to a vertical plane, a night time cover assembly configured to close the access opening, the night time cover assembly comprising: a roller blind cylinder associated with an upper edge of the access opening and being fastened to the refrigerated shelf unit housing, a flexible insulating film (48, 48') comprising an upper end which is fixed to the roller blind cylinder, wherein, when the assembly is in an open state, the flexible insulating film is rolled on the roller blind cylinder and, when the assembly is in a closed state, the flexible insulating film is rolled off the roller blind cylinder so as to be spanned in the access opening, a horizontal tensioning rail arranged at the lower end of the insulating film (48, 48'), at least one pivot arm (44, 44') whose upper longitudinal end is hinged at a housing-side pivot hinge and whose lower longitudinal end is hinged at a tensioning rail-side holding hinge 52), wherein the hinges (50, 52) are inclined so that a pivot plane of the pivot arm (44, 44') corresponds to the opening plane and is inclined by at least 10° to at most 70° with respect to the vertical plane, a roller blind cylinder associated with an upper edge of the access opening and being fastened to the refrigerated shelf unit housing, a flexible insulating film (48, 48') comprising an upper end which is fixed to the roller blind cylinder, wherein, when the assembly is in an open state, the flexible insulating film is rolled on the roller blind cylinder and, when the assembly is in a closed state, the flexible insulating film is rolled off the roller blind cylinder so as to be spanned in the access opening, a horizontal tensioning rail arranged at the lower end of the insulating film (48, 48'), at least one pivot arm (44, 44') whose upper longitudinal end is hinged at a housing-side pivot hinge and whose lower longitudinal end is hinged at a tensioning rail-side holding hinge 52), wherein the hinges (50, 52) are inclined so that a pivot plane of the pivot arm (44, 44') corresponds to the opening plane and is inclined by at least 10° to at most 70° with respect to the vertical plane, characterized in that the pivot arm (44, 44') is provided as a telescopic arm and comprises at least two telescopable telescopic bars (56, 58).