Load-Type Sliding Door Mechanism With Inclined Rail
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Solution Overview
Problem
Conventional load-type door opening and closing devices face issues with slow operation speed and durability due to excessive load on the sliding member, difficulty in manual operation, and susceptibility to failure from impact forces and dust accumulation, especially when multiple users are involved.
Innovation Solution
The device features a sliding support rail and an inclined door opening rail with a footboard coupled through a coupling member, where the sliding member is positioned at the upper end of the rail, allowing the stepping force to act vertically and reduce the load on the sliding member, enhancing durability and operation speed by moving the sliding member along the downward inclination of the rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sliding member is pressed against the door opening rail in the up direction through leverage, then the door can be moved in the opening direction, but the weight of the door is applied to the sliding member causing excess load and reduced durability
Solution Approach 1:
The patent inverts the conventional arrangement by positioning the sliding member at the upper end of the door opening rail instead of the lower end. This inversion changes the direction of force application: stepping force now pushes the sliding member downward along the inclined rail, allowing the door weight to be supported by the rail structure rather than the sliding member. This resolves the contradiction by maintaining operational ease while eliminating excessive load on the sliding member, thereby improving durability.
2Ease of operation
If the sliding member moves along the upward inclination direction of the door opening rail, then the door can be opened, but the operation speed is slow even with use of leverage
Solution Approach 1:
The patent reverses the movement direction of the sliding member from upward to downward along the inclined rail. By positioning the sliding member at the upper end and having it move downward under stepping force, the door opens more quickly. This inversion eliminates the slow operation issue while maintaining the leverage mechanism's operational ease.
3Extent of automation
If the sliding support rail is inclined downward in the closing direction, then the door can close automatically, but manual movement of the door becomes difficult when failure occurs
Solution Approach 1:
The patent applies different inclination characteristics to different parts of the door opening rail. The upper portion of the rail has a steeper inclination to enable quick door opening, while the lower portion has a gentler inclination that facilitates both automatic closing and manual movement. This local differentiation of rail inclination resolves the contradiction between automatic closing functionality and ease of manual operation during failures.
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
This configuration improves the durability and quickness of door operation by reducing the load on the sliding member, allowing for rapid and efficient opening and closing without manual effort, even with multiple users, and simplifies maintenance with no need for power sources or complex installations.
Implementation Method 1
a door opening rail that is inclined upward in an opening direction of the door
Implementation Method 2
a sliding member that is slidably attached to the door opening rail
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
Provide is a sliding door opening and closing device that horizontally opens and closes the sliding door with application of light weight. The advent of a metal automatic door that is not electrically driven and always uses stepping force of a user even during power failures or disasters has been anticipated. A load-type door opening and closing device comprises: a sliding support rail 2 slidably supporting the door 1 to open and close the door; a door opening rail 3 provided in the door 1 and inclined upward in an opening direction of the door 1; a sliding member 4 sliding on the door opening rail 3; a footboard 5; and a coupling member 6 that couples the sliding member 4 with the footboard 5. The sliding member 4 is located at an upper end side of the door opening rail 3 when the door 1 is closed, and the sliding member 4 is depressed against the door opening rail 3 by stepping force acting on the footboard 5 during opening operation, to displace the door 1 in the opening direction.