Clamp Arm Position Feedback for Safe Load Detachment
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Solution Overview
Problem
The handling of loads with varying dimensions and weights in warehouses and factories using clamping devices is challenging due to restricted visibility and the risk of accidents when operators fail to fully open the clamp arms during load release, especially when stacking loads high.
Innovation Solution
A method that informs the operator when the clamp arms are sufficiently detached from the load by measuring the distance and position of the arms relative to each other and the load, using sensors and signals to ensure safe movement of the loader.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the clamp arms are manually opened during load release, then the operator can control the release process, but the visibility to the arms and contact surfaces is restricted making it difficult to ensure sufficient detachment
Solution Approach 1:
The patent applies feedback by providing visual indicators (lights) that show the operator the position of the clamp arms and contact surfaces. The system includes sensors that detect arm position and transmit this information to the operator through visual signals, enabling the operator to make informed decisions about when to move the loader safely.
Solution Approach 2:
The patent introduces an intermediary system consisting of sensors, signal processors, and visual indicators that mediate between the physical clamp arm position and the operator's perception. This intermediary system translates physical positions into visible signals, solving the visibility problem without requiring direct line of sight.
2Reliability
If the operator relies on visual inspection to ensure arms are fully opened, then safety can be monitored, but accidents may still occur due to restricted visibility
Solution Approach 1:
The system continuously provides feedback about arm position through visual indicators, enabling real-time safety monitoring. The feedback mechanism ensures the operator is always informed of the current state, preventing accidents caused by insufficient arm detachment.
Solution Approach 2:
The system performs preliminary detection of arm position before the operator attempts to move the loader. By providing advance warning signals when arms are not sufficiently opened, the system prevents potential accidents before they occur.
3Adaptability or versatility
If different frame and arm combinations are used to adapt to varying load dimensions, then the clamp can handle different load sizes, but the complexity of the clamping device increases
Solution Approach 1:
The patent employs dynamically adjustable arm positions and lengths rather than fixed combinations. The arms can be extended or repositioned based on the specific load dimensions, providing adaptability without requiring multiple discrete arm sets. This dynamic adjustment reduces device complexity while maintaining versatility.
Solution Approach 2:
The clamping device is designed with universal arms that can accommodate various load dimensions through adjustment mechanisms. Rather than having specialized arms for each load type, the system uses multi-functional arms that can be configured for different applications, reducing overall system complexity.
4Productivity
If asymmetric clamping arms are used to handle specific load types, then the clamp performance is optimized, but the visibility problem is exacerbated
Solution Approach 1:
The patent introduces visual indicator systems as intermediaries that compensate for the visibility limitations created by asymmetric arm configurations. The indicators provide information about contact surface positions that would otherwise be difficult to observe due to the asymmetric geometry.
Solution Approach 2:
The system uses color-coded visual indicators (different colored lights) to convey information about arm position and contact status. This color-based feedback system makes it easier for operators to quickly assess the state of asymmetric arms without requiring detailed visual inspection of each component.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Method for handling loads (6, 7) with a load handling device (2) connected to a loader (1), which load handling device comprises at least two arms (3a, 3b) with contact surfaces (4a, 4b) for contacting substantially opposite side surfaces of a load and wherein at least one of the at least two arms (3a) is movable in relation to the other arm (3b) for obtaining the clamping and release operations for the load, wherein when the load (6, 7) is clamped between the contact surfaces (4a, 4b) the distance and/or position of the arms (3a, 3b) in relation to each other or in relation to the handled load is defined, and during releasing of the load the movement and/or position of the arms in relation to each other or in relation to the handled load is measured, and once defined distance and/or position between the arms or in relation to the handled load is reached, a signal indicating safe movement of the loader (1) is issued.