SAFETY MANHOLE Safety Manhole
Safety Manhole (Automatic Guardrail Interlocking)
Acquired Official Performance Certification from the Ministry of SMEs and Startups • Non-powered Automatic Railing Deploying Immediately Upon Opening
Acquired Official Performance Certification from the Ministry of SMEs and Startups • Non-powered Automatic Railing Deploying Immediately Upon Opening
This is the world's first innovative public safety infrastructure solution developed to prevent fall accidents from manhole openings scattered across water/wastewater treatment plants and pedestrian paths. The physical rotational force generated during cover opening is mechanically interlocked with precision gears to automatically deploy a fall prevention guardrail and safety barrier band around the opening that fully meet ANSI/OSHA standards.
World's First Safety Manhole 4-Axis Opening and Closing Drive Simulation
This is an interlocking model video showing the fall prevention guardrail automatically deploying through precision gear interlocking without any mechanical delay the moment the manhole cover is opened. Click on each type card below to immediately play the corresponding simulation video.
1 DOOR Open Type (Inspection Port/Water Sampling)
Designed for routine water sampling for water quality measurement in sewage sedimentation tanks, etc., and simple visual inspection. Even when only one door is opened, the built-in handrail and safety barrier band firmly block the lower opening to secure the worker's safety.
2 DOOR Full Open Type (Facility Maintenance/Equipment Entry)
Applicable when a large area entry is required, such as positioning large mechanical gear units or repairing lower pumps. Interlocked with the opening angle of both doors, a super-large guardrail bar surrounding all four sides is formed, turning the fall hazard zone into a safe zone.
4 DOOR Inspection Hatch Type (4-way Guard Connection)
This lineup is suitable for large-diameter underground utility tunnels or public pits. Depending on individual inspection purposes, the four doors can be opened sequentially or simultaneously. The gear interlocking is designed with multiple axes to prevent fence distortion or malfunctions.
4 DOOR Equipment Hatch Type (Non-powered Lift)
This is a dedicated lifting infrastructure lineup designed for large-area, non-powered opening and closing of all four doors to bring in and take out large rotating machinery, pumps, and heavy equipment for inspection into underground facilities.
Key Product Features (Key Features)
- Non-powered Automatic Interlocking: Purely mechanical precision gear interlocking operation without external power supply or switches
- One-Person Opening/Closing Design: Combining a precision hinge and auxiliary compensation mechanism, one person can easily operate the large, heavy manhole cover
- Dual Safety Structure: Individual guards operate automatically even during partial opening from 1 DOOR to 4 DOOR according to the required area
- Reduction of Safety Procedures: Maximizes work efficiency by omitting the installation procedures for temporary fences or mobile safety cone warnings
- High-Visibility Luminous Structure: Can be equipped with optional luminescent and high-brightness LED for visibility at a glance even at night or in underground treatment plants with low illuminance
- Super engineering plastic guard ensures wear resistance and semi-permanent lifespan
Conventional Manhole vs. Linkon Handrail Automatic Interlocking Safety Manhole
| Comparison Item | Conventional Manhole | Linkon Safety Manhole (Fully Certified for Performance) |
|---|---|---|
| Required Opening/Closing Personnel | Requires at least 2 people (High physical burden such as back injuries) | Can be opened by one person alone (Auxiliary gas spring and hinge mechanism) |
| Fall Prevention Device | Requires separate mobile safety guard after opening, manually installed | Instantly forms automatic safety handrails without power upon opening the cover |
| Required Work Time | Significant preparation time required for transporting, installing, and removing mobile fences | Safety zone is completed simultaneously with opening the manhole, reducing preparation time by 90% |
| External Power/Tools | Requires assembly tools or heavy support fixtures for installation | Purely mechanical non-powered (No additional power or assembly tools required at all) |
| Flexible Maintenance | Since the cover is integrated, it must be fully opened, leaving a risk of falling | Individual doors can be opened separately according to the purpose (simple inspection, equipment insertion) |
Technical Specifications
Product Consultation & Document Request Available
Linkon Technology Co., Ltd. actively supports customized engineering designs tailored to on-site specifications.