Elevator Door Lock

Elevator Door Triangular Safety Lock (EDTSL)

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Installation Position and Function of Elevator Door Lock

‌1. Installation Position‌

The triangle lock is installed on the elevator landing door (hall door), typically near the door latch mechanism. For landing doors, it’s mounted on the side opposite the hinges;

‌2. Core Function‌

This safety device prevents unauthorized door opening by requiring a triangle-shaped key to disengage the lock. It ensures that the elevator door remains securely closed when not in operation, complying with international safety standards like EN 81-20.

‌3. Technical Advantages‌

• ‌Mechanical Interlock‌: Physically blocks door movement without proper key activation

• ‌Tamper-Resistant Design‌: Specialized key shape prevents standard tools from bypassing

• ‌Dual-Purpose Use‌: Can be installed as both primary lock and backup safety feature

‌4. Operational Principle‌

When the elevator reaches a floor, the triangle key inserts into the lock mechanism, releasing the latch to allow door opening. The lock automatically re-engages when the door closes, creating a failsafe barrier against accidental openings.

Elevator Triangle Lock – Premium Safety Solution

‌1. Product Overview‌
The triangle lock is a high-security door interlock system designed for elevators, featuring a patented triangular key mechanism. Manufactured to EN 81-20 standards, it ensures foolproof door protection for both landing doors and car doors.

‌2. Key Features‌

‌Anti-Tamper Design‌: Unique key shape prevents unauthorized access with standard tools
‌Dual-Mode Installation‌: Compatible with vertical/horizontal door configurations (landing doors & car doors)
‌Fail-Safe Mechanism‌: Automatically re-locks upon door closure without manual intervention
‌Corrosion-Resistant‌: Zinc alloy construction with IP54-rated dust/water resistance

‌3. Technical Specifications‌

Parameter	Value
Operating Force	≤50N
Key Insertion Depth	12±0.5mm
Temperature Range	-30°C to +70°C
Certification	CE, ISO 9001, GOST

‌4. Competitive Advantages‌
• 30% faster installation than conventional locks
• 500,000+ cycle durability tested
• Customizable branding on key heads

‌5. Application Scenarios‌
✔ Residential elevators
✔ High-rise commercial buildings
✔ Hospital/airport passenger elevators
✔ Fire-rated elevator systems

‌6. Why Choose Our Product?‌
As the original triangle lock manufacturer since 2010, we combine German precision engineering with cost-effective Chinese manufacturing. All products undergo 100% functional testing before shipment.

‌Core Manufacturing Processes of Elevator Triangle Locks

‌1. Material Selection‌
• ‌Lock Body‌: High-strength zinc alloy (EN AC-43000) for corrosion resistance
• ‌Key Mechanism‌: Precision-machined stainless steel (AISI 304) with triangular profile
• ‌Spring Component‌: Music wire (SWP-B grade) for 500,000+ cycle durability

‌2. Key Production Stages‌
‌a) CNC Machining‌

5-axis milling creates lock body cavities with ±0.05mm tolerance
Laser engraving forms anti-counterfeit key patterns

‌b) Hardening Treatment‌

Case hardening (HRC 50-55) for wear-resistant key teeth
Electroless nickel plating (5-8μm) for corrosion protection

‌c) Assembly & QC‌

Robotic arm installation of springs and locking pins
100% functional testing with certified load cells (≥200N force test)

‌3. Functional Integration‌
• ‌Interlock System‌: Mechanical linkage with door sensors (EN 81-20 compliant)
• ‌Safety Feature‌: Automatic re-locking after 3-second key removal