Abstract: Disclosed is a casing structure by which stiffness of a casing of a container refrigeration unit for cooling the interior of a container can be increased without affecting the arrangement, shape, and maintainability of devices accommodated in the casing. A container interior side of the external casing (12) which constitutes the casing (11) is provided with flanges (34) which extend vertically and which are located at both end portions of the external casing (12) along a dimension of the container width. Each of the flanges (34) has a rectangular cylindrical portion (34a) extending vertically along the external casing (12).

Abstract: Disclosed is a casing structure by which stiffness of a casing of a container refrigeration unit for cooling the interior of a container can be increased without affecting the arrangement, shape, and maintainability of devices accommodated in the casing. A container interior side of the external casing (12) which constitutes the casing (11) is provided with flanges (34) which extend vertically and which are located at both end portions of the external casing (12) along a dimension of the container width. Each of the flanges (34) has a rectangular cylindrical portion (34a) extending vertically along the external casing (12).

Abstract: A multi-layered panel wherein an interlayer material in a fluid state or in a solidified state transformed therefrom is provided between a pair of panels, comprises an internally-threaded member fitted in a through-hole formed in an outer one of the panels, and a cap capped on the internally-threaded member. The cap has a bottomed tubular-shaped body portion adapted to be brought into close contact with an outer peripheral surface of the internally-threaded member while sealing a threaded hole of the internally-threaded member, and a panel-contact contributing portion supported by the body portion, and adapted to be, at least partly, closely contactable with the outer panel.