Description
Elevator lock elevator car small door lock JK5077-1 Brief Introduction
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Product Name |
Elevator lock elevator car small door lock |
| Model Number | JK5077-1 |
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Elevator Car Small Door Lock JK5077-1: Safety Protection Core from Nanjing Zhuye Elevatorparts
Elevator Car Small Door Lock JK5077-1 is a specialized safety locking component designed for elevator car small doors (including maintenance doors, inspection doors, and emergency exit doors on the car). It integrates mechanical locking and electrical interlocking functions, ensuring the small door remains securely locked during elevator operation and only authorized personnel can unlock it for maintenance or emergency purposes. The lock is equipped with an interlocking switch that transmits real-time locking status signals to the elevator controller—if the small door is not properly locked, the elevator cannot start or run, effectively preventing safety hazards such as personnel falling into the shaft or equipment damage. Compatible with mainstream elevator car models (including OTIS, Mitsubishi, and KONE), this small door lock is widely applicable to residential, commercial, and industrial elevators, serving as a critical safety barrier for elevator car systems. Exclusively supplied by Nanjing Zhuye Elevatorparts, a professional provider of high-quality elevator safety components, the Elevator Car Small Door Lock JK5077-1 fully complies with international elevator safety standards (EN 81-20, GB 7588) and mechanical lock technical specifications. Manufactured with premium materials and precision assembly technology, it features excellent anti-prying performance, high durability, and stable interlocking signal transmission, winning trust from global elevator maintenance teams and manufacturers.
Nanjing Zhuye Elevatorparts adheres to the core philosophy of “Secure Locking, Reliable Interlocking” and implements strict quality control for the JK5077-1 elevator car small door lock. Each unit undergoes multi-stage pre-delivery inspections, including locking strength testing, interlocking signal verification, durability testing, and environmental adaptability evaluation. The JK5077-1 small door lock adopts advanced materials and technologies: the lock body is made of high-strength stainless steel (304 grade), effectively resisting corrosion and impact; the lock core uses a precision pin-tumbler structure with anti-drilling and anti-pick functions, supporting over 10,000 times of reliable locking/unlocking; the built-in interlocking switch uses silver-nickel alloy contacts, ensuring low contact resistance (≤ 50mΩ) and stable signal transmission; the lock bolt is equipped with a self-locking mechanism to prevent accidental unlocking due to vibration; the surface is treated with anti-corrosion coating, adapting to harsh environments inside the car and shaft (-30℃ to 70℃). The standardized mounting structure enables seamless matching with most elevator car small door designs, simplifying installation and replacement.
Step-by-Step Usage Guide for Elevator Car Small Door Lock JK5077-1
To maximize the safety performance, service life, and operational stability of the Elevator Car Small Door Lock JK5077-1, strictly follow the professional guidelines provided by Nanjing Zhuye Elevatorparts for selection, installation, and maintenance:
1. Professional Selection & Pre-Installation Preparation
Installation must be performed by certified elevator technicians. Prior to selection, refer to the elevator car small door’s thickness, material, and mounting hole dimensions, or consult Nanjing Zhuye Elevatorparts’ technical team to confirm compatibility of the JK5077-1 lock. Preparation steps: Cut off the elevator’s main power supply and lock the power switch; place a “Maintenance in Progress” warning sign at the elevator entrance; move the elevator car to a flat floor and stabilize it with mechanical supports; open the car small door (using the original lock or emergency tool) and clean the lock mounting area on the door and door frame to remove dust, oil stains, and debris; prepare professional tools such as a screwdriver, wire stripper, and multimeter.
2. Correct Installation & Interlocking Calibration
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Lock Body Fixing: Take the JK5077-1 car small door lock from Nanjing Zhuye Elevatorparts, align it with the pre-marked mounting holes on the small door, and fix the lock body with high-strength stainless steel bolts (torque: 20–25N·m). Ensure the lock is installed horizontally without tilting, and the lock bolt can smoothly extend into the door frame’s lock hole when the door is closed.
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Interlocking Wiring: Connect the lock’s interlocking switch wires to the elevator controller’s safety circuit according to the elevator’s electrical schematic and Nanjing Zhuye Elevatorparts’ wiring manual. Distinguish between power lines (DC 12V–24V) and signal lines; ensure tight wiring and correct polarity to avoid interlocking function failure. Use cable ties to fix the wire harness to the car frame, preventing friction with moving components.
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Function Calibration: Close the car small door and test the locking function with the matching key—ensure the key inserts and rotates smoothly, and the lock bolt extends fully to lock the door. Use a multimeter to test the interlocking switch: the switch should be closed (signal on) when the door is locked, and open (signal off) when the door is unlocked. Operate the elevator controller to confirm that the elevator can only start when the interlocking signal is normal (door locked).
3. Post-Installation Testing & Daily Maintenance
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Safety Testing: Restore the elevator’s power supply and test the interlocking protection function: Attempt to start the elevator with the small door unlocked—confirm the elevator cannot start and the controller displays an alarm. Close and lock the small door, then test the elevator’s normal operation to ensure the interlocking function does not affect regular use. Test the emergency unlocking function to ensure authorized personnel can quickly unlock the door with the key in emergencies.
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Daily Inspection: Maintenance personnel should check the lock during daily car inspections: Observe the lock body for damage, corrosion, or loose mounting; check the keyhole for blockage (clean with compressed air if necessary); test the locking/unlocking smoothness with the key; use a multimeter to test the interlocking switch’s signal transmission status regularly.
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Regular Maintenance: Every 3 months, apply a small amount of anti-rust lubricant to the lock core and bolt to ensure flexible operation (avoid excessive lubricant that may attract dust). Every 6 months, check the lock bolt’s wear degree and the tightness of mounting bolts; re-tighten the bolts if loose. For elevators in high-humidity or dusty environments, clean the lock surface regularly and apply anti-corrosion coating annually.
Recommended Replacement Cycle for Elevator Car Small Door Lock JK5077-1
As a core safety component enduring long-term mechanical wear, environmental erosion (humidity, dust, temperature changes), and frequent locking/unlocking operations, the JK5077-1 elevator car small door lock has a specified service life. Timely replacement is crucial to avoiding faults such as lock core jamming, bolt wear, or interlocking switch failure—issues that may lead to unauthorized access to the car, elevator operation disorders, or loss of safety protection, posing serious risks to personnel and equipment.
1. Standard Replacement Cycle
Under normal operating conditions (daily locking/unlocking times ≤ 20, operating environment temperature -30℃ to 70℃, humidity 10%–95%), the recommended replacement cycle for the JK5077-1 elevator car small door lock is 5–7 years. This cycle is determined based on Nanjing Zhuye Elevatorparts’ long-term field operation data, lock core wear tests, and global user feedback on elevator safety locks.
2. Adjustments for Special Scenarios
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High-Frequency Use & Harsh Environments: For elevators requiring frequent small door access (e.g., elevators in construction sites or with regular maintenance) or in harsh environments (e.g., coastal areas with high salt spray, industrial sites with strong corrosion), the replacement cycle is shortened to3–4 years. Frequent use accelerates lock core and bolt wear, while harsh environments cause rapid corrosion of the lock body and interlocking switch.
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Low-Frequency Use & Stable Environments: For elevators with low small door usage frequency (e.g., residential elevators, small office buildings) and stable operating environments (constant temperature and humidity), the replacement cycle can be extended to7–10 years—only after Nanjing Zhuye Elevatorparts’ technicians inspect and confirm that the lock core performance, bolt wear, and interlocking signal stability meet factory standards.
3. Immediate Replacement Conditions
Replace the JK5077-1 elevator car small door lock immediately if any of the following issues occur, regardless of its service life:
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The lock core is stuck or the key cannot rotate smoothly, making it impossible to lock or unlock normally.
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The lock bolt is severely worn, deformed, or cannot extend/retract fully, leading to incomplete locking of the small door.
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The interlocking switch fails, and the locking status signal cannot be transmitted to the controller, causing the elevator to be unable to start or run abnormally.
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The lock body is severely corroded, cracked, or damaged due to impact, reducing its anti-prying performance and safety.
In conclusion, the Elevator Car Small Door Lock JK5077-1 from Nanjing Zhuye Elevatorparts is a high-quality, highly reliable safety protection component tailored for modern elevator systems. By following the correct selection, installation, maintenance, and replacement guidelines, elevator maintenance teams can effectively ensure the safety of the elevator car small door, prevent potential hazards, and enhance the overall safety of the elevator system. Choosing Nanjing Zhuye Elevatorparts means you get 100% authentic JK5077-1 car small door locks, plus professional support—including model matching, on-site installation guidance, and prompt after-sales service. Trust Nanjing Zhuye Elevatorparts for the safety protection of your elevator car small door.
