Tote Four-Way Shuttle Robot for Medicinal Herb Storage and Picking

Medicinal herb warehouses manage a wide range of product categories, batch numbers, packaging types, and storage requirements. From raw herbs and decoction pieces to small-package finished products, daily operations often include frequent inbound, storage, picking, checking, and outbound tasks.

Traditional person-to-goods picking depends heavily on manual searching, repeated order checking, and operator experience. As SKU quantity grows, this model can lead to low efficiency, picking errors, delayed information updates, and weak batch traceability.

To solve these challenges, the tote four-way Shuttle Robot can be used as the core equipment for high-density tote storage and goods-to-person picking. In the medicinal herb warehouse case, the system used 600 x 400 x 300 mm totes, with a load capacity of 30 kg per tote. The tote AS/RS was configured with 10 tote four-way Shuttle Robots, 5 tote lifts, and a two-level loop conveyor system, reaching a capacity of 300 totes per hour.

A medicinal herb warehouse is not only a storage area. It is also a batch management center, quality control point, and order fulfillment hub.

A single warehouse may handle hundreds of herb varieties, multiple packaging specifications, and thousands of SKUs. In the case study, the warehouse involved around 500 to 600 herb categories, around 400 commonly used herbs, and more than 3,000 SKUs based on incomplete statistics.

For large-batch materials, pallet AS/RS can support full-pallet storage. For small-batch, multi-variety, and high-frequency picking, the tote four-way Shuttle Robot becomes the key equipment.

Before automation, workers had to walk to shelves, search for herbs, repeatedly check order information, pick materials manually, and then sort and pack them by customer. This created heavy workload, low picking efficiency, and a higher risk of errors.

With the tote four-way Shuttle System, the workflow changes. The system automatically stores totes in high-density racking. When an order is released, WMS generates the task, WCS schedules the shuttle robots, and the required tote is delivered to the picking station through lifts and conveyors.

Operators no longer need to search through shelves. The required tote comes directly to the picking station.

This goods-to-person model reduces walking distance, shortens picking time, improves order response speed, reduces manual searching, lowers picking errors, improves operator comfort, and supports batch traceability.

The tote four-way shuttle robot can move freely inside the rack system. It is not limited to a single fixed aisle. This allows the warehouse to use space more efficiently and increase storage density.

In the case study, the tote shuttle AS/RS adopted a double-deep tote rack structure with a rack height of about 15 meters. The system was designed for compact storage, fast access, and future expansion.

Medicinal herbs require strict control over product name, specification, origin, batch, quantity, and storage status. Manual records can easily cause information delays or mismatches.

With the tote four-way shuttle system, each tote can be managed as an independent inventory unit. During inbound operation, the system can check barcode information, weight, profile, material data, batch information, and storage rules.

The solution also integrates a double-level tote picking line. The upper conveyor line transports totes waiting for picking, while the lower conveyor line handles picked materials and empty tote return. This structure improves space utilization, reduces unnecessary handling, and keeps the picking area organized.

At the picking station, the system can be equipped with operation terminals, large-screen picking prompts, barcode scanning, weight verification, light-guided picking, photoelectric detection, and multi-dimensional checking.

The tote four-way shuttle robot is not just a standalone machine. Its value comes from system-level coordination.

In the solution, WMS manages inventory, orders, batch rules, and storage strategies. WCS schedules tote shuttles, lifts, conveyors, and picking lines. Together, the systems coordinate inbound task creation, storage location allocation, tote movement, lift scheduling, goods-to-person picking, outbound confirmation, inventory updates, and exception handling.

After implementation, the medicinal herb supplier achieved significant improvement in storage and picking performance.

For medicinal herb warehouses, the challenge is not only storing more goods. It is storing more SKUs, picking faster, reducing errors, and keeping every batch traceable.

By combining tote shuttle robots, tote lifts, double-level conveyors, goods-to-person picking stations, WMS, and WCS, the system helps medicinal herb companies build a more efficient, accurate, and intelligent warehouse.