Foldable Box Container with Steel Pipe Reinforcement and Interlocking Side Panels

The problem

Traditional rigid plastic or metal containers occupy significant volume even when empty, leading to high return freight costs and inefficient warehouse storage. While some collapsible bins exist, they often suffer from weak locking mechanisms that fail under heavy loads or complex assembly processes that slow down packing operations. There is a need for a container that offers the structural integrity of a rigid box during transport but collapses easily for storage, without requiring separate locking clips or tools.

The solution

This patent describes a foldable box container where the side panels are hinged to the bottom plate. The key innovation lies in the connection between the long and short side panels. When the box is assembled, the long panels slide over the short panels, engaging bayonet sockets on the long panel sides with clamping posts on the short panel sides. Additionally, hooks on the long panels engage with the bases of the short panels to secure the vertical alignment.

The bottom plate features a central protruding slot designed to accept a steel pipe. This pipe runs through the center of the container, providing internal reinforcement against deformation under heavy loads. The periphery of the bottom plate has notches that align with buttress mouth column structures on the upper edges of the side panels, allowing multiple containers to stack securely.

Who it is for

• Logistics companies looking to reduce return freight costs by minimizing the volume of empty containers.
• Manufacturing plants needing durable, reusable containers for moving parts between workstations.
• Retail distribution centers that require stackable containers with integrated tracking capabilities (RFID).
• Agricultural exporters transporting fluids or bulk goods who need reinforced structures to prevent bursting.

How it works

The main parts

Operating steps

1. Assembly: Lift the long and short side panels from the flat position. Slide the long panels over the short panels so that the bayonet sockets engage the clamping posts.
2. Locking: Ensure the hooks on the long panels catch the bases of the short panels, creating a rigid rectangular frame.
3. Reinforcement: Insert a steel pipe into the central slot of the bottom plate to enhance load-bearing capacity.
4. Stacking: Place another container on top; the buttress mouth columns on the upper edges fit into the notches on the bottom plate of the lower container.
5. Folding: To collapse, disengage the hooks and slides, then fold all panels inward toward the bottom plate.

Applications

Industrial Parts Transport

Factories move heavy metal components between stations. The steel pipe reinforcement prevents the bottom from sagging under weight, while the interlocking panels ensure the box stays square during forklift handling.

Agricultural Fluid Handling

Farmers transport liquids or semi-solids like fertilizers. The robust structure resists pressure from inside, and the ability to add a top cover with sealing holes helps contain spills during transit.

Retail Supply Chain Tracking

Distribution centers manage thousands of SKUs. The integrated RFID mounting points on the handles allow automated scanning of entire pallets of containers, speeding up inventory checks without manual label application.

Warehouse Space Optimization

During off-seasons, empty containers are stacked or nested. The folding mechanism reduces the footprint considerably compared to rigid boxes, freeing up valuable shelf space for stocked goods.

Where it is less suitable

• Single-use packaging: The cost of manufacturing this durable, reusable unit is higher than disposable cardboard or thin plastic.
• Extreme temperature environments: The patent does not specify material heat resistance; standard plastics may deform if used near furnaces or freezers without specific material grades.
• Very small items: The minimum dimensions required for the interlocking mechanism make it unsuitable for tiny jewelry or electronic component trays.