What is the space utilization rate of the multi-level small item sorting grid chute
1、 Quantitative comparison: multi-layer vs. traditional side-by-side single-layer sliding groove
Condition: Same mainline length, same grid width
Single layer side-by-side arrangement
To have N grid slots, it is necessary to extend N sets of chutes backwards along the sorting main line, with a horizontal depth that is multiplied; Occupying a huge flat space.
2-4 layer vertical stacking chute (
1、 Quantitative comparison: multi-layer vs. traditional side-by-side single-layer sliding groove
Condition: Same mainline length, same grid width
Single layer side-by-side arrangement
To have N grid slots, it is necessary to extend N sets of chutes backwards along the sorting main line, with a horizontal depth that is multiplied; Occupying a huge flat space.
2-4 layer vertical stacking chute (mainstream solution)
Within the same horizontal depth, the number of grid openings directly doubles/triples/quadruples;
Double layer: equally occupying space, increasing grid capacity by 100%
Three floors: equal land occupation, increased grid capacity by 200%
Fourth floor: equal land occupation, increased grid capacity by 300%
Intuitive examples
Single layer scheme: 40 grid openings, occupying a depth of 8m;
Four layer sliding groove scheme: with the same depth of 8m, 160 grid openings can be arranged; The occupation of flat land is directly reduced by 75%.
Key point: It saves expensive sorting operation area and fully utilizes the vertical height of the factory, which is very suitable for e-commerce warehouses and small transfer centers with a floor height of ≥ 4.5m.
2、 4 core constraints affecting space utilization (natural loss points)
1. Depth loss caused by the inclination angle of the chute
The gravity chute must maintain an inclination angle of 18 ° to 30 ° (22 ° to 26 ° is commonly used for small items), and the higher the drop, the longer the horizontal projection of the chute.
The more layers there are, the greater the height difference between the upper and lower layers, and the horizontal depth of the bottom chute is forced to elongate;
If not designed properly, the bottom of the high-level chute will encroach on the operating space of the lower level, resulting in "mutual occupation" of space.
Optimization plan: Adopting a staggered arrangement of upper and lower layers to avoid complete overlap of the chute and compress the overall depth.
2. Safety gaps between floors and space occupied by support structures
Each level of chute support, edge protection, and maintenance clearance will occupy a vertical height of 120-200mm;
The more layers there are, the larger the accumulated space occupied by the bracket; It is not recommended to exceed 5 floors, as the vertical space loss increases rapidly and exceeds the artificial comfortable operating height.
3. Ergonomic boundary of manual operation (incompressible)
At the end of small item sorting, manual packaging is commonly used:
Industry range: Operating height 800mm (bottom layer) to 1650mm (top layer)
Exceeding 4 layers can easily result in the top layer being too high and the bottom layer being too low, requiring more operational space to be reserved and reducing utilization;
If the width of the operation channel is forcibly compressed, it will cause traffic congestion and jamming during warehouse explosions.
The clear width of the conventional single-sided operation channel is ≥ 1200mm; for double-sided operation, it is ≥ 1800mm.
4. Redundancy in package cache capacity and grid size
Small item storage space needs to be reserved at the end of the chute; The width of the grid must reserve redundancy for the cargo type and cannot exactly fit the package size, otherwise it is easy to get stuck. Redundancy directly affects the effective utilization of space.
3、 Ranking of Space Utilization Ratios in Different Layout Forms (from High to Low)
1. Multi layer staggered sliding groove
The upper and lower sliding grooves are staggered to avoid the upper sliding groove bottom plate being vertically pressed above the lower channel, and the overall depth is the shortest under the same number of layers; At present, the mainstream solution for cross belt small item grids is.
2. Multi layer stacked sliding groove
Vertical alignment up and down, simple structure, but with greater depth, resulting in higher space waste compared to misalignment schemes; Suitable for scenes with sufficient depth of the venue.
3. Single layer parallel sliding groove
Low utilization rate, consuming a large amount of flat area, only suitable for scenarios with large items and low grid quantities.
4. Spiral groove
Vertical conveying is fast, but the number of compartments is small, making it suitable for vertical transportation and not suitable for dense sorting with multiple destination compartments.
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