Elevator Door Rail Shielding Against Belt Wear Debris
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Solution Overview
Problem
The adhesion of abrasion powder from an endless belt to the door rail and roller in elevator door devices causes difficulty in smooth opening and closing movement of the door parts.
Innovation Solution
The elevator door device incorporates a wear-debris adhesion suppression part, which is a part of the frame member extending in the opening and closing direction, positioned to cover the door rail and rollers, and disposed between the drive pulley and the door rail and rollers, effectively blocking wear debris from adhering to these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door rail is disposed below the drive pulley and the roller rolls on the door rail during door opening and closing, then the door part can move smoothly along the door rail, but wear debris from the endless belt adheres to the door rail and roller, causing difficulty in smooth movement
Solution Approach 1:
A wear-debris adhesion suppression part is introduced as an intermediary component between the drive pulley and the door rail/roller. This suppression part intercepts wear debris generated by the endless belt before it can adhere to the door rail and roller, thereby maintaining smooth door operation without interfering with the rolling mechanism
Solution Approach 2:
The wear-debris adhesion suppression part is designed to extract or remove wear debris from the operational area. By positioning this suppression part to cover the door rail and roller while being disposed between the drive pulley and these components, wear debris is prevented from reaching the critical rolling surfaces
2Object-affected harmful factors
If the wear-debris adhesion suppression part is disposed between the drive pulley and the door rail and roller, then wear debris adhesion is suppressed, but the structural complexity of the door device increases
Solution Approach 1:
The wear-debris adhesion suppression part is designed to perform multiple functions: it suppresses wear debris adhesion to the door rail and roller, and simultaneously serves as a protective cover or shield. This multi-functionality reduces the need for additional separate components, thereby minimizing the increase in structural complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The wear-debris adhesion suppression part effectively prevents wear debris from adhering to the door rail and rollers, ensuring smooth operation of the door parts by reducing the accumulation of debris during the opening and closing process.
Implementation Method 1
a roller rotatable around a rotary shaft that extends orthogonal to the opening and closing direction and in a horizontal direction, the door part configured to move in the opening and closing direction by rolling of the roller on the door rail
Implementation Method 2
an endless belt that is wound around the drive pulley and the driven pulley... the door hanger is connected to the endless belt that is rotated by the motor to move the door part in the opening and closing direction
Implementation Method 3
a drive pulley and configured to drive to rotate the drive pulley; a driven pulley disposed apart from the drive pulley in the opening and closing direction
Data Source
AI summary
The present invention provides an elevator door device including a door rail, a door part configured to move by rolling of a roller on the door rail, a door drive part, and a wear-debris adhesion suppression part extending in an opening and closing direction of the door part. The door drive part includes a motor part configured to drive and rotate a drive pulley, a driven pulley disposed apart from the drive pulley in the opening and closing direction, and an endless belt that is wound around the drive pulley and the driven pulley, and to which the door part is connected. The door rail is located below the drive pulley. The wear-debris adhesion suppression part is disposed between the drive pulley, and the door rail and the roller, and disposed at a position corresponding to the drive pulley in the opening and closing direction.