A concave square tube lifting storage shelf, comprising
- a plurality of post components, respectively comprising a concave square tube and a plurality of elongated holes secured by fasteners, wherein each of the post components has an upper end and a lower end opposite to the upper end, each of the concave square tubes comprises a first plate, a second plate, a third plate, and a concave plate, each of the first plates and the corresponding second plate are parallel to each other, and two sides of each of the third plates are respectively connected to the corresponding first plate and the corresponding second plate, two sides of each of the concave plates are respectively connected to the corresponding first plate and the corresponding second plate, and the elongated holes secured by fasteners are respectively assembled on the concave plate at regular intervals, each of the elongated holes secured by fasteners comprises a fastening hole, and a hollow portion is provided within each of the concave square tubes;
- a plurality of assembly fixtures, wherein each of the assembly fixtures comprises a left-side plate, a right-side plate, and a bottom-side plate, wherein two sides of each of the bottom-side plates are vertically connected to the corresponding left-side plate and the right-side plate, one of the assembly fixtures is correspondingly assembled at positions of the upper end and the lower end of each of the post components, and each of the left-side plates is attached to a surface of the corresponding first plate, each of the right-side plates is attached to a surface of the corresponding second plate, and each of the bottom-side plates is attached to a surface of the corresponding third plate;
- and
- a plurality of storage layers, each comprising a movable shelf and four assembly components, wherein the four assembly components are respectively provided at four corners of the corresponding movable shelf, the size of the four assembly components is larger than the size of the concave square tubes, the storage layers can move along a lifting direction, the four assembly components comprise a plurality of protruding columns, the storage layers move along a first assembly direction, the protruding columns are fastened respectively into the corresponding fastening holes to assemble the storage layers between the post components, and the four assembly components in the storage layer corresponding to the upper end and the lower end of each of the post components are respectively attached to an outer surface of the corresponding assembly fixture.