Sliding Door Safety Device with Disk Roller Locking Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing safety devices for sliding doors either require manual operation or exert excessive resistance when closing, leading to potential finger pinching and noise issues during the opening and closing process.
Innovation Solution
A safety device comprising a guide frame and a feed plate with a disk roller mechanism, where the feed plate collides with the disk roller to move the shaft into a lock groove, preventing further closure and ensuring smooth operation without manual intervention or excessive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a stopper is manually operated to prevent pinching, then finger safety is improved, but operation convenience deteriorates due to cumbersome manual switching
Solution Approach 1:
The safety device automatically detects closing speed and activates the stopper function without manual intervention. The feed plate with collision face and disk roller with shaft automatically engage when excessive closing speed is detected, eliminating the need for manual operation while maintaining safety
Solution Approach 2:
The device uses the closing speed of the sliding door as feedback to automatically control the stopper activation. When the feed plate collides with the disk roller at excessive speed, the shaft moves to the lock groove, activating the stopper function proportionally to the detected closing speed
2Object-affected harmful factors
If an oil dumper is used to control closing speed, then finger safety is improved, but closing force requirement increases
Solution Approach 1:
The invention extracts the speed control function from the closing mechanism itself and places it in the safety device. The feed plate and disk roller detect closing speed independently, allowing the main closing mechanism to operate freely without excessive force requirements while still preventing pinching through automatic stopper activation
Solution Approach 2:
The feed plate acts as an intermediary that transfers closing speed information to the disk roller, which then activates the stopper. This indirect control mechanism allows safety activation without requiring excessive closing force, as the speed detection is passive and the stopper engagement is automatic
3Device complexity
If a manual stopper system is used, then device complexity is reduced, but reliability deteriorates due to human error in operation
Solution Approach 1:
The safety device monitors its own operating conditions (closing speed) and automatically activates the stopper function without human intervention. This self-monitoring and self-activation capability eliminates human error while maintaining relatively simple device structure through the feed plate-disk roller-shaft mechanism
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
Prevents finger pinching and noise by automatically inhibiting the sliding door's closure when excessive force is applied, ensuring safe and quiet operation.
Implementation Method 1
a slow movement groove provided to extend in a left-right direction along a direction of movement of the sliding door and a lock groove consecutively connected to the slow movement groove
Data Source
AI summary
[Problem] To provide a safety device for a sliding door with which finger pinching can be automatically prevented without manually operating a stopper, and which can be smoothly closed without a resistance that acts when closing the sliding door. [Solution] A safety device for a sliding door is provided with a guide frame 11 and a feed plate 12 that are mounted on the opening side and the sliding door side, respectively, so as to face each other. A low-speed movement groove 38a and a lock groove 38b are provided on the guide frame 11 side. A contact face 12c that is inclined to contact a disk roller is provided on the feed plate 12 side. In addition, when the feed plate 12 collides with the disk roller 14 at a force stronger than or equal to a prescribed value, the shaft 14b of the disk roller 14 is moved from inside the low-speed movement groove 38a to inside the lock groove 38b and the movement of the disk roller 14 in the left-right direction is locked.