European distribution centers are being pushed in three directions at once: higher throughput, narrower delivery windows, and rising cost per square metre. A パレットシャトルシステム addresses these by storing pallets in deep, high-density lanes and using autonomous shuttle vehicles to move goods to a lift or workstation. The result is a storage architecture that can pack more pallet positions into the same cube while reducing dependence on large numbers of forklift moves inside the rack.

What a Pallet Shuttle System Changes in a European DC
A pallet shuttle system is not a single machine. It is a coordinated set of mechatronic modules: racking, rail-guided shuttles, vertical lifts, conveyors or interfaces, and control software. The shuttle travels in four directions within a rack level, so it can change aisles and service multiple deep lanes without a crane. A vertical bidirectional shuttle, such as the H-bot in Zikoo’s 六方向シャトル architecture, moves pallets between rack levels and works as the vertical transport hub. The R-bot 四方向シャトル operates inside the rack, while the PTP software platform provides WMS, WES, WCS, and RCS functions for mission orchestration, inventory allocation, and traffic management.
This architecture changes the operating model of a distribution centre. In a conventional wide-aisle warehouse, many pallet moves depend on a driver travelling to the location. In a shuttle system, software selects the pallet, dispatches the shuttle, and brings the pallet to a drop-off point. That makes replenishment, picking, and marshalling more predictable. For European DCs with expensive land and high labour costs, the shift from driver-dependent travel to software-directed retrieval is often the main source of benefit.
The R-bot platform shows the range of pallet interfaces that a European DC should expect. It is available in multiple models to suit different regional pallet footprints and load weights:
| モデル | Pallet interface | 定格負荷 | Empty / loaded speed |
|---|---|---|---|
| R1200B standard type | 1,200 × 800–1,000 mm | 1,200 kg | 1.6 m/s / 1.2 m/s |
| R1500J Japanese type | 1,100 × 1,100 mm | 1,500 kg | 1.6 m/s / 1.2 m/s |
| R2000B heavy-duty large pallet type | up to 1,400 mm | 2,000 kg | 1.35 m/s / 1.0 m/s |
| H1800B vertical shuttle | 1,200 × 800–1,200 mm | 1,800 kg | 1.0 m/s / 0.5 m/s |

The H-bot vertical shuttle adds positioning accuracy of ±1 mm, which matters when transferring pallets between levels at height. In a multi-level system, that repeatability reduces the risk of pallet skew, rack contact, and downstream scan failures.
European Operating Conditions and System Configuration
Pallet mix and load interfaces
One of the first decisions in a European DC is not the robot; it is the pallet population. The EPAL Euro pallet footprint is 1,200 mm × 800 mm with a nominal safe working load of 1,500 kg [1]. Many logistics sites also run 1,200 × 1,000 mm industrial pallets, UK pallets, or overseas pallets on 1,219 × 1,016 mm footprints. If the shuttle is too tightly matched to one pallet size, the DC loses flexibility. If it is too generic, the lane guidance and load handling can become less precise. The practical response is a vehicle family with defined pallet-interface variants, as in the R-bot standard, American, Japanese, and heavy-duty models. The buyer should not assume that a system handles every pallet type without confirming which pallet sizes and load weights actually enter the DC.
Temperature, energy, and building constraints
European food and pharmaceutical distribution often combines ambient, chilled, and frozen storage in one building. In cold stores, shuttle batteries, sensors, and control boards need to operate at low temperature. The R-bot cold chain solution uses a −25 °C lithium battery with a low-temperature charging port design and PCBA coating for high-humidity environments. This is not a generic cold-room setting; the electrical system has to be specified for condensation and deep-freeze cycling. Standard R-bot models already operate down to −15 °C, while the cold-chain configuration extends that envelope.

European cold-chain projects also put pressure on energy consumption, defrost cycles, and door management. <コールドチェーン物流の革新:Zikoo Robotics六方向シャトルが高密度・高効率倉庫を実現> covers how dense shuttle storage reduces the refrigerated volume that must be maintained per pallet position.
Configuration choices
A 四方向シャトルシステム fits a DC that needs 密な収納 and flexible horizontal travel. A six-way configuration, combining R-bot horizontal shuttles with H-bot vertical lifts, fits a multi-level building where pallets must move between levels quickly. A narrow-aisle U-bot stacker robot may be more appropriate when the project is a retrofit into an existing building with aisles of about 2,100 mm and lower ceiling heights. The choice is not a single best shuttle, but the minimum architecture that meets the required storage depth, throughput, and building constraint.
Configuration checkpoint: If you are deciding between a four-way layout and a six-way lift-assisted layout, email [email protected] with the building cross-section and peak pallet flow. A short configuration options note usually prevents over- or under-sizing at this stage.
Throughput, Space, and Compliance Planning
Throughput and space
The capacity of a shuttle system is determined by several variables: the number of shuttles per level, lift capacity, the distance from storage lanes to drop-off points, and the order profile. The R-bot four-way shuttle travels at up to 1.6 m/s empty and 1.2 m/s loaded in standard models, while the H-bot vertical shuttle runs at up to 1.0 m/s empty. These vehicle speeds are only one input. A well-designed system can still deliver poor throughput if every pallet has to pass through one lift or one workstation. The layout should provide enough lifts and input/output positions for peak hour, not average day.

Deep-lane storage reduces aisle count and increases pallet positions per square metre, but lane depth must be matched to SKU velocity. A very deep lane suits slow-moving, single-SKU reserve storage. A shallower lane with more shuttle travel paths suits fast movers and high-SKU operations. For European distribution centres that handle both retail replenishment and e-commerce peaks, mixed lane depths and shuttle zones are generally more effective than one uniform lane length.
CE marking, safety, and rack tolerance
A pallet shuttle system placed in the EU market must be CE marked under the Machinery Directive 2006/42/EC [2]. Rail-dependent storage and retrieval machines fall under the safety requirements of EN 528 [3]. Continuous handling elements at the interface with conveyors and lifts need to be assessed under EN 619 [4]. The rack structure itself must be designed, installed, and inspected to the tolerances of EN 15620, because shuttle guidance depends on plumb, level, and straight rack alignment [5]. Buyers should require a documented risk assessment, a complete technical file, and alignment measurements as part of site acceptance testing, not just a declaration that the equipment is CE marked.
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参考文献
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