Quadrangular shelving comprising four bars with sets of four first pairs of holes, wherein the location of said sets defines different heights of the shelving for establishing the quadrangular trays, a set of quadrangular trays, wherein each tray comprises four corners and wherein each corner forms an opening and comprises a second pair of holes, the shelving comprises for each tray of the set of quadrangular trays: four plates, a pair of screws adapted to screw each plate and wherein the plate covers the opening.

The present invention discloses a connecting structure, a connecting method and an article containing the connecting structure. The connecting structure includes a fastener, a first connecting member adjacent to the trailing end of the fastener and a second connecting member away from the trailing end of the fastener. The second connecting member is provided with a threaded connecting hole, which in the axial direction thereof is provided with thread matching with the form of thread of the fastener and having a central angle of at least 180 degrees. The first connecting member is provided with a connecting hole, and the fastener connects the two connecting members through the threaded connecting hole and the connecting hole. The connecting method achieves quick connecting with the connecting hole of the first connecting member by preloading the fastener to the threaded connecting hole, without being affected by the assembly space. The connecting structure and the connecting method can be used in a variety of articles. The thickness of the threaded connecting hole is equal to the pitch of the fastener. The form of thread of the threaded connecting hole is fitted with the thread of the fastener by only one turn, which during processing can be made directly in the form of stamping, resulting in a simple processing and improving the processing efficiency.

A bracket mounting structure includes a bracket, a base, a connecting member, an elastic member, and a mounting member. The bracket includes a longitudinal wall. The base is arranged adjacent to the longitudinal wall and includes a first space and a second space. The connecting member is mounted in the first space and includes a first portion, a second portion, and a through hole arranged in the first portion and the second portion. At least one of the first portion and the second portion has a screw thread feature. The elastic member is received in the first space and is configured to apply an elastic force to the connecting member. The mounting member is mounted in the second space.

A bracket device includes a bracket and a connecting member. The bracket includes a longitudinal wall with an end portion. The connecting member can arrive at either of a first position and a second position with respect to the longitudinal wall and includes a connecting feature for connecting with a fixing member. The connecting member is away from the end portion of the longitudinal wall of the bracket when at the first position, and is close to the end portion of the longitudinal wall of the bracket when at the second position.

A bracket device includes a bracket and a connecting member. The bracket includes a longitudinal wall with an end portion. The connecting member can arrive at either of a first position and a second position with respect to the longitudinal wall and includes a connecting feature for connecting with a fixing member. The connecting member is away from the end portion of the longitudinal wall of the bracket when at the first position, and is close to the end portion of the longitudinal wall of the bracket when at the second position.

An adjustable free-standing shelving unit with horizontal shelf support beams suitable for holding one or more wire deck panels, which are detachably mounted to vertical corner posts by way of a unique combination of shoulder bolts, attached to the horizontal support beams, and keyhole slots in the vertical corner posts. In some embodiments, shoulder bolts having a head with a wrench receiving surface, an unthreaded shoulder, and a threaded shank are attached to the horizontal support beams using hex nuts. The keyhole slots, which are formed in each of the angled flat sides of the L-shaped vertical corner posts, are sized so that the heads of the shoulder bolts can be inserted into the wide upper openings of the keyhole and then pushed downwardly so that the unthreaded shoulders of the bolts will slide into the low slots.

An adjustable free-standing shelving unit with horizontal shelf support beams suitable for holding one or more wire deck panels, which are detachably mounted to vertical corner posts by way of a unique combination of shoulder bolts, attached to the horizontal support beams, and keyhole slots in the vertical corner posts. In some embodiments, shoulder bolts having a head with a wrench receiving surface, an unthreaded shoulder, and a threaded shank are attached to the horizontal support beams using hex nuts. The keyhole slots, which are formed in each of the angled flat sides of the L-shaped vertical corner posts, are sized so that the heads of the shoulder bolts can be inserted into the wide upper openings of the keyhole and then pushed downwardly so that the unthreaded shoulders of the bolts will slide into the low slots.

A shelf is configured for use with a weight rack including first and second vertical members extending generally parallel to each other and positioned in spaced relation to each other. The shelf supports one or more free weights and has first and second opposed ends and front and rear sides extending between the ends, where the first end of the shelf is connected to the first vertical member and the second end of the shelf is connected to the second vertical member, such that the first and second vertical members support the entire weight of the shelf. The shelf may include a rotation limiting structure to limit rotation of the shelf with respect to the vertical members. A weight rack may be outfitted with one or more such shelves, and in one configuration, the weight rack may include a number (N) of adjacent shelf stacks supported by number (N+1) of vertical members.

An adjustable free-standing shelving unit with horizontal shelf support beams suitable for holding one or more wire deck panels, which are detachably mounted to vertical corner posts by way of a unique combination of shoulder bolts, attached to the horizontal support beams, and keyhole slots in the vertical corner posts. In some embodiments, shoulder bolts having a head with a wrench receiving surface, an unthreaded shoulder, and a threaded shank are attached to the horizontal support beams using hex nuts. The keyhole slots, which are formed in each of the angled flat sides of the L-shaped vertical corner posts, are sized so that the heads of the shoulder bolts can be inserted into the wide upper openings of the keyhole and then pushed downwardly so that the unthreaded shoulders of the bolts will slide into the low slots.

An adjustable free-standing shelving unit with horizontal shelf support beams suitable for holding one or more wire deck panels, which are detachably mounted to vertical corner posts by way of a unique combination of shoulder bolts, attached to the horizontal support beams, and keyhole slots in the vertical corner posts. In some embodiments, shoulder bolts having a head with a wrench receiving surface, an unthreaded shoulder, and a threaded shank are attached to the horizontal support beams using hex nuts. The keyhole slots, which are formed in each of the angled flat sides of the L-shaped vertical corner posts, are sized so that the heads of the shoulder bolts can be inserted into the wide upper openings of the keyhole and then pushed downwardly so that the unthreaded shoulders of the bolts will slide into the low slots.