Suction Unloader Control for Top-Layer Separation Accuracy
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Solution Overview
Problem
Existing unloaders face challenges in accurately detecting and separating the topmost article layer from a stack, often resulting in incomplete separation due to incorrect positional information or attachment issues, leading to potential collisions and damage.
Innovation Solution
An unloader system featuring a suction device, a mover, and an article detector that computes a vertical relative distance and performs a predetermined-direction moving process to prevent suction portion movement when an article is detected, ensuring accurate detection and separation of the topmost layer without collision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the suction portion moves toward the stack of articles to separate the topmost layer, then the unloading operation can be performed, but articles may remain unseparated or collide with the suction portion causing damage
Solution Approach 1:
The article detector performs detection at a position spaced downward from the suction surface by a predetermined distance before the suction portion reaches the target article group. This preliminary detection allows the system to identify articles in advance and adjust the suction portion's movement accordingly, preventing collisions and ensuring complete separation of the topmost layer.
Solution Approach 2:
The detection result from the article detector is fed back to control the mover's operation. When an article is detected at the predetermined distance position, the system adjusts the suction portion's vertical movement to maintain appropriate spacing, enabling real-time correction of separation accuracy while maintaining operational efficiency.
2Measurement precision
If the detection line is positioned closer to the suction surface for better detection accuracy, then article detection improves, but the risk of collision between the suction portion and articles increases
Solution Approach 1:
The detection is performed at a predetermined distance downward from the suction surface before the suction portion reaches the detection line position. This timing allows accurate detection of articles while maintaining a safety margin that prevents collision between the suction portion and detected articles.
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 solution enables precise detection and separation of the topmost article layer, reducing the risk of collisions and improving the unloading process by maintaining appropriate vertical distances and directional control.
Implementation Method 1
a suction device including a suction portion to suction an upper surface of the target article group to hold the target article group
Data Source
AI summary
An unloader includes a suction device including a suction portion, a mover, a controller, and an article detector. The controller moves the suction portion relative to a mount in a first predetermined direction to switch from a state in which a vertical relative distance is greater than a greater one of an article height or a predetermined distance and is less than a total length of the article height and the predetermined distance and in which a detection line is located in a second predetermined direction from a target article group to a state in which the detection line is located in the first predetermined direction from the target article group, and prohibits an operation to move the suction portion in a vertical direction toward the target article group when the article detector detects an article.