Warehouse density calculations for long materials rarely favor the status quo. A conventional cantilever rack installation in an 8-meter clear-height building might utilize 30 to 40 percent of available cubic volume, with the remainder consumed by aisle clearance and the empty space above stored bundles. Herochu’s AS/RS Systems for High-Density Automated Steel Pipes Storage invert this ratio by treating vertical space as the primary storage dimension and horizontal floor area as a constraint to be minimized.
The mechanism enabling this density gain is the gantry robot, a three-axis Cartesian system that rides on floor-mounted rails spanning the storage array. Unlike stacker cranes that require aisle access to each rack face, the Herochu gantry operates within the rack structure itself. Towers stand adjacent to one another with no inter-tower clearance, and the gantry’s travel path runs along the face of the array at a single shared picking aisle. The result is a storage footprint that can be three to five times more space-efficient than flat storage for equivalent inventory volume, with floor area recovered for cutting stations, welding cells, or finished goods staging.
Retrieval cycle times remain competitive despite the density. The gantry travels at 5 to 30 meters per minute horizontally and 5 to 15 meters per minute vertically, delivering a bin to the output station within a cycle that typically completes in under two minutes for the furthest tower position. For multi-shift operations, this speed translates into throughput capacity that manual forklift retrieval cannot match: a single operator managing automated retrieval replaces the multiple workers required for searching, forklift operation, and material transport across a sprawling pipe yard.
The control system integrates density management with inventory intelligence. The PLC assigns storage locations based on material turnover rates, placing fast-moving stock in bins closest to the output station and consolidating slow-moving inventory in more distant positions. This algorithmic slotting reduces average retrieval time without requiring physical reorganization of the rack structure. When production schedules shift and material demand patterns change, the system reassigns priorities dynamically through the touchscreen interface.
Herochu manufactures the HC-X series in three standard model families differentiated by pipe length capacity. The HC-X6053-8 accepts 6,000-millimeter stock across five layers with 3,000-kilogram per-level loading. The HC-X7065-10 extends to 7,000 millimeters with six layers and 5,000-kilogram capacity. The HC-X8085-10 accommodates 8,000-millimeter material across eight layers at the same 5,000-kilogram rating. All three share the same gantry drive platform and PLC control architecture, meaning spare parts inventory and operator training remain consistent across a mixed fleet. Customization beyond these standard configurations is available, with layer counts, rack quantities, and bin dimensions adjusted to match the customer’s material profile and building dimensions.
Safety systems operate continuously during automated cycles. Laser sensors scan the gantry path and halt movement upon obstruction detection. Load monitoring verifies bin weight against rated capacity before lifting initiates, aborting the cycle if an overload condition exists. Mechanical fail-safes on the chain drive prevent uncontrolled descent in the event of drive malfunction. These protections operate independently of the operator, addressing the failure modes that manual handling introduces when heavy loads move at height.
