Classroom on demand

Welcome to Classroom on demand, your source for educational materials related to the vertical transportation industry. This site represents the knowledge and expertise of the best engineers and mechanics in the elevator industry, and will help those new to the elevator industry learn about the basic workings of elevator systems, and also will serve as a reference for people with more experience.

Hatch Equipment Module

1. The platform assembly is the surface that the cab sits on.
2. The sling assembly is the framework around the cab and platform.
3. The safety assembly attaches to the bottom of the car sling or in some cases to the counterweight sling, which is called “safety plank.”
4. One rail guide assembly, typically four sets of roller guides, is fastened to the car sling and a second rail guide assembly is fastened to the counterweight sling, typically four sets of roller guides, to guide the car and counterweight on their respective rails.
5. The pit assembly is a device on which spring or oil buffers are mounted.
6. Rail bracket assembly is used to hold the main and counterweight rails in place.
7. The limit switch assembly includes brackets, switches, and a cam. In its simplest form, the cam activates the limit switch. The limit switch stops the movement of the elevator from extending beyond the terminal landings.
8. Fasteners are the hardware used to build and mount various assemblies, including the sling.
9. An insert assembly is inserted into the hoistway wall and used to attach the rail bracket to the wall.
10. The pit ladder assembly is used to access the pit area from the bottom landing.
11. The counterweight sling assembly is used to house the counterweights that are used to counterbalance the weight of the elevator car plus approximately half of the capacity load.
12. Hoist ropes are used to support the car (and passing over the drive sheave to the counterweight) pulls the car.

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