Elevators Technician

The Process Of "Brooming" Or "Flowering" An Elevator Wire Rope, Which Is The Preliminary Step For Creating A Spelter Socket.

✅Rope Termination Process

7This traditional "old school" method of rope termination involves several critical steps:

⚙️Brooming/Flowering: The end of the wire rope is opened so that each strand and individual wire stands apart. This increases the surface area for the binding agent to grip.

⚙️Cleaning: It is essential to clean the wires thoroughly of all lubricants before pouring the socket.

⚙️Socketing: The "flowered" end is pulled into a socket. For a proper installation, a small amount (typically around 1/8") of the "rosette" or "turn back" should remain exposed past the socket and the pour for inspection purposes.

✅Safety and Inspection
Improperly executed terminations can lead to safety hazards. Common issues include:

🔴Deep Seating: Pulling the turn backs too deep into the socket, which prevents inspectors from verifying the termination's integrity.

🔴Birdcaging: A type of damage where outer strands are forced open into a cage-like shape, often due to a sudden release of tension or shock loading.

🔴Corrosion/Rouge: The appearance of red, dusty iron oxide (rouge) indicates internal corrosion, often caused by poor lubrication or moisture.

The Mitsubishi Electric Diamond-Trac® MRL (Machine-Room-Less) elevator is a high-performance, space-saving vertical transport system designed for, and sold in, the United States. It features a compact PM gearless traction machine, offering a smooth, quiet ride with up to 35% energy savings via regenerative drive technology, making it ideal for modern, sustainable building design.

✅Key Features of Diamond-Trac® MRL Elevators:

⚙️Space-Saving Design: Eliminates the need for a separate machine room, as all equipment fits within the hoistway, allowing for greater architectural freedom.

⚙️Performance and Efficiency: Utilizes a permanent magnet (PM) gearless motor with low torque ripple for a comfortable, quiet ride.

♻️Energy Efficiency: Regenerative converter technology allows the elevator to feed power back into the building's electrical network, reducing energy usage by up to 35%.

⚙️Flexible Installation: The slim control panel can be placed anywhere within a 100-foot (30-meter) radius of the traction machine, allowing flexible layout options.

⚙️Sustainability: The systems are designed for long life cycles and improved sustainability.
Advanced Connectivity: Equipped with ReadyConnect™ technology, allowing integration with building management systems, including HVAC, security, and smart building features.

⚙️Diamond-Trac® Streamline: A streamlined version offering pre-designed, cost-effective options to reduce manufacturing lead times for faster projects.

✅Specifications:
Capacity: 2000 lbs to 5000 lbs.
Usage: Commonly used in mid-rise applications.

Mitsubishi Elevator Maintenance

guides shoes car

Level Switch👍

Elevator Safety System, Specifically Focusing On How It Prevents A Cabin From Falling In An Over-speed Or Free-fall Scenario.
Core Components and Their Functions⚙️

⚙️Over-speed Governor:

This is the "brain" of the safety system, usually located at the top of the elevator shaft. It monitors the speed of the car via a dedicated governor rope. If the car exceeds a preset speed, centrifugal force causes the governor to lock.
Lever Linkage & Pulling Rod: When the governor locks, the governor rope pulls on this linkage attached to the cabin. This mechanical action pulls the Pulling Rod upward.

⚙️Safety Gear

(The Brake): The pulling rod activates the safety gear. In the diagram, you can see how the upward movement of the rod (indicated by the red arrows) forces the Brake Shoes (wedge-shaped blocks) upward into the tapered Clamps.

⚙️Guild Rail (Guide Rail): The heavy steel track that the elevator travels on. The safety gear works by physically "biting" or clamping onto this rail.
How the Emergency Braking Works
The bottom right diagram illustrates the mechanical physics of the braking action:
Activation: The pulling rod is yanked upward during an over-speed event.

⚙️Wedge Action: As the Brake Shoes are pulled up, they are forced inward by the angled walls of the clamp.
Friction (
): This creates an immense normal force against the Guild Rail. The resulting upward friction force (
) opposes the downward weight (
) of the cabin.
Spring Tension: The Springs on the outside ensure that a constant, regulated pressure is applied so the stop is firm but not so instantaneous that it injures passengers.
Result: The elevator is effectively wedged onto the rails, staying frozen in place until technicians can manually reset the system.

✅Note: This system is entirely mechanical and designed to work even if the elevator loses all electrical power.

Elevator Car's Bottom System, Specifically An Underslung Sheave Beam Assembly And Safety Plank. This System Is A Crucial Part Of The Elevator's Car Frame, Which Supports The Cabin And Integrates Various Safety And Operational Components.

⚙️Sheave Beam Assembly:

The Yellow Components House Sheaves (Pulleys) For The Wire Ropes. These Assemblies Are Often Designed To Pick On The Center Of Gravity Of The Car.
⚙️Safety Plank:

The main horizontal metal structure (grey) is the safety plank. It is typically constructed of heavy-duty C-channel and plate members.
Guide Rollers/Shoes: The blue assembly on the left includes guide rollers that run along the guide rails in the elevator shaft, ensuring the car travels smoothly and stays aligned.

⚙️Roping System: The wire ropes visible are part of the elevator's suspension and traction system, often configured in a 2:1 roping Undersling

Fujitec and Mitsubishi Electric are Japanese multinational corporations with a global presence in the elevator and escalator market.
Fujitec is known for its focus on innovation, incorporating features like IoT-enabled elevators and energy-regenerative drives. They have a significant manufacturing presence in India and other regions.
Mitsubishi Electric is globally recognized for high standards in innovation, efficiency, safety, and comfort. They have secured major orders for large developments and are noted for advanced features like destination control systems and energy efficiency optimization.
Key Differences and Offerings
While both brands are considered reputable and offer quality products, specific project requirements often determine the better fit.
Market Position: In terms of general company ratings on certain platforms, Mitsubishi Electric tends to rate slightly higher than Fujitec.
Technology: Mitsubishi Electric is often seen as having edged further ahead in performance in recent years when comparing their products in other sectors like air conditioning. Their elevator systems focus on advanced monitoring and control systems for seamless performance.
Maintenance & Service: Both companies emphasize quality service and genuine parts, with Fujitec promoting faster movement, silent transit, and reduced downtime through their maintenance programs.