Elevator Door Height Raising Member for Motor Positioning
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Solution Overview
Problem
Conventional car door devices for elevators require a larger motor and more space due to the need for a taller frame to accommodate high ceilings, leading to increased costs and weight of the door panels.
Innovation Solution
A height raising member that supports the motor at a higher position relative to the frame, allowing the motor to be positioned above the ceiling while maintaining a lower frame height, using a configuration with a base part and a supporting part connected via adjustable holes and fixing members to adjust the motor's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the frame height is increased to accommodate high ceilings, then the motor can be positioned above the ceiling, but the door panel height and weight increase
Solution Approach 1:
The invention divides the frame structure into two independent parts: the main frame body and the height raising member. The height raising member is a separate component that attaches to the upper end of the frame, extending upward to raise the motor position. This segmentation allows the motor to be positioned above the ceiling without increasing the height of the main frame body, thereby preventing the door panel from needing to be taller and heavier.
Solution Approach 2:
The height raising member acts as an intermediary structure between the main frame and the motor. It provides the necessary vertical extension to position the motor above the ceiling while keeping the main frame compact. The height raising member includes a base part connecting to the frame and a supporting part holding the motor, with adjustable holes allowing precise positioning.
2Length of stationary object
If the frame height is increased to position the motor above the ceiling, then the motor clearance is improved, but the car door device occupies more space and costs more
Solution Approach 1:
By segmenting the height-raising function into a separate attachable component (height raising member) rather than increasing the main frame size, the invention achieves motor clearance above the ceiling without proportionally increasing the overall volume of the car door device. The height raising member extends vertically from the compact frame, minimizing horizontal space occupation.
3Reliability
If the motor position is raised above the ceiling, then the belt tension is maintained, but the frame structure becomes more complex
Solution Approach 1:
The height raising member serves as an intermediary structure that simplifies the overall design by providing a dedicated mounting platform for the motor at the required height. Rather than redesigning the entire frame structure to accommodate the motor above the ceiling, the height raising member is attached to the existing frame, maintaining simple pulley and belt arrangements while achieving proper motor positioning for optimal belt tension.
Data Source
AI summary
The present invention includes a height raising member body mountable to an upper end of a frame disposed above an entrance of a car that moves up and down through an elevator shaft, in which a rail for guiding a car door in an opening and closing direction and a pulley for use in opening and closing drive of the car door are mounted to the frame. The height raising member body characteristically includes: a base part connectable to the frame; and a supporting part capable of supporting the motor at a position upward away from the base, the motor being configured to drive the pulley via a belt.