Flexible Expandable Double-row Gravity Roller Conveyor

FB Flexible Expandable Gravity Double Roller Conveyor 

Gravity flexible expandable double-roller conveyor is designed specially for handling of carton package with flat bottom. Complete steel structure is used for this conveyor. When laying out according to complete expansion of single curve or composite curve, its structure remains integrated.

Characteristics

This conveyor is defined by a set of unique physical and operational traits:

1. Modular & Portable Design:

• Constructed from lightweight, interlocking sections (typically aluminum or steel).

• Can be compressed to a fraction of its extended length for compact storage and transport. Many models include handles or wheels for easy mobility.

• The "expandable" nature means a single 10-foot conveyor might extend to 15 feet, allowing one unit to service multiple dock doors or truck beds.

2. Dual-Row Roller Configuration:

• This is a key feature. Two parallel rows of rollers create a stable, wide track.

• Benefits:

• Prevents smaller or sagging cartons from getting stuck in the center.

• Provides better support and stability for a wide range of box sizes.

• Allows for smoother movement of irregularly shaped items compared to a single roller line.

3. Unpowered (Gravity-Fed) Operation:

• It has no motors, chains, or belts. Operation is silent and has zero energy cost.

• Movement is entirely dependent on gravity, requiring a consistent downward slope (typically achieved by adjusting the height of the support legs).

4. On-Demand Flexibility:

• The conveyor's spine is designed to flex, allowing operators to bend it into straight lines, "S" curves, or "U" shapes to navigate around corners, pillars, and other obstacles in real-time.

5. Light to Medium Duty Capacity:

• While robust, these conveyors are engineered for cartons, parcels, and totes—not for pallets or extremely heavy industrial parts. Load capacity is a critical specification to check.

6. Low Maintenance:

• With no electrical components and simple bearing-based rollers, maintenance is minimal, usually involving occasional cleaning and bearing lubrication.

Applications

This conveyor excels in dynamic environments where permanence and fixed paths are limitations. Its primary applications include:

1. Loading and Unloading Trucks:

This is its most common use. The conveyor can be extended from a warehouse dock directly into a truck trailer, bent to follow the contour of the trailer walls, maximizing access and efficiency.

2. Parcel & Package Distribution:

Ubiquitous in the shipping industry (e.g., FedEx, UPS) for sorting and moving packages from sorting lines into delivery vehicles quickly.

3. Shipping and Receiving Docks:

Ideal for creating temporary sortation lines, moving received goods to staging areas, or consolidating outbound orders.

4. Moving and Logistics Companies:

Perfect for loading and unloading household goods, office equipment, and general freight from trucks.

5. Seasonal or Fluctuating Workflows:

Excellent for temporary operations like pop-up distribution centers, holiday season peaks, or special projects where a permanent conveyor is not justified.

6. Assembly and Production Kitting:

Used to bring components from storage to assembly stations and can be easily reconfigured or moved as production needs change.

Specifications of FB Flexible Expandable Gravity Roller Conveyor 

Model No.	Units	Length	Width	Height	Load/unit	Rollers/unit	Qty of Legs	Weight
FB-50-450×1	1	450-1250	450	800-1000	100	18	2	56
FB-50-450×2	2	900-2500					3	91
FB-50-450×3	3	1350-3750					4	126
FB-50-450×4	4	1800-5000					5	160
FB-50-450×5	5	2250-6250					6	197
FB-50-450×6	6	2700-7500					7	232
FB-50-500×1	1	450-1250	500	800-1000	100	18	2	59
FB-50-500×2	2	900-2500					3	95
FB-50-500×3	3	1350-3750					4	132
FB-50-500×4	4	1800-5000					5	169
FB-50-500×5	5	2250-6250					6	204
FB-50-500×6	6	2700-7500					7	243
FB-50-600×1	1	450-1250	600	800-1000	100	18	2	64
FB-50-600×2	2	900-2500					3	103
FB-50-600×3	3	1350-3750					4	142
FB-50-600×4	4	1800-5000					5	182
FB-50-600×5	5	2250-6250					6	220
FB-50-600×6	6	2700-7500					7	262

Model No. FB-50-500×5 Example

FB-series

50-roller diameter

500-transportation surface width

×5-five units

Critical Distinction: How it Turns vs. a Tapered Roller Conveyor

It is crucial to understand how this conveyor creates a curve compared to the Gravity Tapered Steel Roller discussed previously.

• Flexible Expandable Conveyor: The curve is created by physically bending the entire conveyor frame. The rollers themselves are straight and remain parallel to each other. The curve is a result of the flexible spine, and the outer path is simply longer than the inner path. This works well for lightweight loads but can cause larger, rigid items to bind if the curve is too tight.

• Gravity Tapered Roller Conveyor: The conveyor frame is rigid and fixed. The curve is achieved mechanically because each individual roller is tapered. The difference in diameter from one end to the other forces the load to turn. This provides a positive, controlled turn for very heavy loads like pallets.

Conclusion

In summary, the Flexible Expandable Gravity Double Roller Conveyor is the epitome of logistical agility. It is an unpowered, portable, and adaptable workhorse that solves the "last-mile" problem inside warehouses and loading docks. Its value is not in handling immense weight or serving as a permanent fixture, but in its ability to be instantly deployed, reconfigured, and stored, making material handling more efficient and ergonomic in ever-changing environments