Pneumatic Counterbalanced Machine Guard for Easy Vertical Handling
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Solution Overview
Problem
Existing protective devices for machines, particularly container treatment machines, are difficult for operators to maneuver due to the weight of the protective elements, posing a risk of injury and affecting operational safety, especially as they depend on the operator's physical constitution.
Innovation Solution
A protective device with a pneumatic unit that includes a pressurizable pneumatic element to balance the weight force of the protective element, allowing it to be moved easily in the vertical direction, using compressed air to compensate for the weight during both upward and downward movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the protective element is made heavier to ensure adequate protection and shielding, then the protective function is improved, but the ease of operation deteriorates as operators struggle to move it manually
Solution Approach 1:
The patent applies the anti-weight principle by introducing a pneumatic unit that generates an upward force to counterbalance the weight of the protective element. The pneumatic element (such as a pneumatic cylinder or air spring) provides a counteracting force that compensates for gravity, allowing the heavy protective element to be moved easily between closed and open positions without requiring significant manual effort from operators.
Solution Approach 2:
The patent employs pneumatics by using a pneumatic unit connected to the protective element. This pneumatic unit uses compressed air to generate the necessary force to support and move the protective element. The pneumatic system provides controlled force application, enabling smooth movement of the heavy protective element while maintaining safety standards.
2Device complexity
If manual handling of the protective element is used to simplify the device structure, then the device complexity is reduced, but the risk of operator injury increases due to the weight of the protective element
Solution Approach 1:
The pneumatic unit acts as a counterweight mechanism that offsets the harmful effect of the protective element's weight. By generating an upward force equal to or slightly greater than the gravitational force on the protective element, the pneumatic unit eliminates the risk of operator injury during manual handling while keeping the overall device structure relatively simple.
Solution Approach 2:
The pneumatic unit serves as an intermediary between the protective element and the operator. Instead of the operator directly handling the heavy protective element, the pneumatic unit mediates the interaction by providing mechanical assistance, thereby reducing the harmful effects of weight on operator safety.
3Ease of operation
If the protective element is designed to be fully supported by the pneumatic unit, then the ease of operation is improved, but the control effort and device complexity increase due to precise pressure adjustment requirements
Solution Approach 1:
The patent applies partial action by designing the pneumatic unit to provide substantial but not necessarily complete compensation for the protective element's weight. The pneumatic element is sized and pressurized to compensate for a significant portion (e.g., 85-95%) of the weight, which is sufficient to make handling easy while avoiding the need for extremely precise pressure control systems.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the pressure in the pneumatic element to achieve the desired level of weight compensation. By changing the pressure parameter within a reasonable range, the system achieves easy handling of the protective element without requiring complex control mechanisms, as the pressure can be adjusted through simple manual or automated means.
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
Ensures operational safety by allowing easy handling of the protective element regardless of the operator's physical strength, reducing the risk of injury and maintaining operational efficiency.
Implementation Method 1
the pneumatic unit comprises a pressurizable pneumatic element, which is configured to substantially compensate for the weight force of the protective element during a movement along the vertical direction
Implementation Method 2
the weight force acting on the protective element is balanced or compensated by the pressure prevailing in the pneumatic element
Data Source
AI summary
A protective device for a machine, for example a container treatment machine, includes a protective element movable in the vertical direction and a pneumatic unit connected to the protective element. The pneumatic unit comprises a pressurizable pneumatic element, which is configured to substantially compensate for the weight force of the protective element during a movement along the vertical direction.