The stacking design of heavy-duty folding storage cages requires a multi-dimensional approach, including structural optimization, precise alignment, anti-tipping devices, and material reinforcement, to achieve stable stacking under high loads. Its core design logic revolves around "mechanical balance" and "safety redundancy," ensuring structural stability even when bearing hundreds of kilograms of weight.
Stacking stability primarily relies on the precise alignment design of the bottom and top. The top frame of the heavy-duty folding storage cage typically has "positioning bosses" welded on it, with their height and diameter precisely calculated. Correspondingly, "positioning grooves" are provided on the bottom frame. During stacking, the grooves of the upper cage precisely fit into the bosses of the lower cage, creating a mechanical alignment. This design not only prevents misalignment during stacking but also evenly distributes vertical pressure across the cage frame, preventing excessive localized stress and deformation. For example, in automotive manufacturing, heavy-duty storage cages for storing engine blocks, using this design, ensure a tight seal and prevent wobbling even when stacked in two layers.
Anti-tipping devices are a crucial element in ensuring stacking safety. Some heavy-duty folding storage cages feature anti-tipping hooks at the top of the side frames. When stacked, the upper and lower cages are connected and secured using these hooks. This design effectively adds lateral support to the stacked structure, resisting tilting caused by external impacts or uneven ground. For example, in logistics hubs, heavy-duty storage cages storing metal coils using this design maintain stability even during minor collisions by forklifts, preventing the risk of overall tipping.
Reinforced materials and structure are fundamental to stacking stability. The frames of heavy-duty folding storage cages are typically made of high-strength steel, such as Q355 low-carbon alloy steel or manganese steel, whose yield strength far exceeds that of conventional steel, allowing them to withstand greater pressure without deformation. The base frame, as the main load-bearing component, is often made of thickened steel plates or welded steel sections, with added reinforcing ribs forming a grid-like load-bearing structure that evenly distributes the weight of the load throughout. For example, a heavy machinery company uses storage cages with a base frame thickness of 12 mm. Combined with reinforced ribs, the maximum deformation of the base frame after long-term storage of a 3-ton machine tool spindle is far below industry standards, ensuring stacking stability.
The reinforced design of the cage door and frame also affects stacking safety. The cage door frame of the heavy-duty folding storage cage is made of steel wire of the same specifications as the main frame. Thickened hinges are used at the connection between the door and the cage body, and the hinge shafts are made of stainless steel, ensuring flexible opening and closing even after long-term use. The cage door locking device uses a "double locking structure," adding a bolt lock in addition to the conventional latches to prevent accidental opening of the cage door due to vibration during handling. For example, in a car manufacturing company storing car chassis, the latches of a storage cage loosened due to road bumps during forklift handling, but the bolt lock device still firmly secured the cage door, preventing the goods from falling.
Limiting the number of stacking layers is also an important safety measure. Heavy-duty folding storage cages typically support limited stacking, generally one to two layers. The specific number of layers needs to be adjusted according to load-bearing requirements and material strength. Limiting the number of stacking layers avoids the risk of tipping over due to a high center of gravity, while also reducing long-term deformation of the bottom cage under pressure. For example, in metallurgical enterprises, storage cages for storing stainless steel plates, by strictly limiting the number of stacking layers and using an anti-slip base design, effectively prevent the center of gravity shift caused by goods sliding during sudden braking of forklifts.
Safety signs and warning designs mitigate risks from the perspective of human operation. Heavy-duty folding storage cages have load-bearing labels affixed to prominent locations on the cage, clearly indicating the rated load capacity, prohibited stacking layers, and usage precautions. The labels are made of wear-resistant and waterproof materials to ensure they remain clearly legible even after long-term use. Some cages also have warning colors painted on the uprights to remind workers to operate safely. For example, a manufacturing warehouse, by standardizing the inspection of load-bearing labels, has eliminated overloading, significantly reducing the damage rate of storage cages due to overloading.
The stacking stability of heavy-duty folding storage cages is achieved through multiple design features, including precise alignment, anti-tipping devices, material reinforcement, reinforced cage doors, stacking restrictions, and safety signs. These designs not only improve the utilization rate of warehouse space, but also provide reliable protection for the storage and turnover of heavy goods from the perspective of structural safety, making them an indispensable core equipment in modern industrial warehousing.
