Tray Feeder Door Lock Mechanism for Safe Component Mounting
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Solution Overview
Problem
In component mounting processes, particularly with tray feeders, safety measures are inadequate during process changes such as tray exchanges, risking operator safety when unskilled operators interact with operational areas.
Innovation Solution
A component mounting device and method featuring a tray feeder with a tray retrieving unit, a mounting head, a heat transfer mechanism, and a door lock mechanism, where the door lock is released only when the tray retrieving unit is at a component pickup position, blocking the interior from the head transfer space, ensuring safe operation during tray exchanges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door lock mechanism allows operator access to the tray housing portion during device operation, then ease of operation is improved, but operator safety deteriorates due to risk of hand entry into hazardous areas
Solution Approach 1:
The tray retrieving unit acts as an intermediary barrier between the operator and the hazardous head transfer space. When positioned at the component pickup position, it physically blocks operator access to the dangerous area, allowing door opening for tray exchange without exposing the operator to moving mounting heads
Solution Approach 2:
The system automatically determines door lock release based on the tray retrieving unit's position. The controller monitors whether the tray retrieving unit is at the component pickup position and automatically releases the door lock state without operator intervention, ensuring safety while enabling necessary access
2Object-affected harmful factors
If the door lock mechanism prevents operator access during device operation, then operator safety is improved, but ease of operation deteriorates due to restricted access during tray exchange
Solution Approach 1:
The door lock state is dynamic rather than fixed. It transitions from locked to released automatically based on the real-time position of the tray retrieving unit. This dynamic control allows the door to be locked during hazardous operations and unlocked during safe operations, balancing safety with operational needs
Solution Approach 2:
The controller receives feedback about the tray retrieving unit's position and automatically adjusts the door lock state accordingly. When the tray retrieving unit reaches the component pickup position and blocks the hazardous area, the controller releases the door lock, providing automatic safety verification before allowing access
3Object-affected harmful factors
If the device stops production during tray exchange, then operator safety is improved by halting moving parts, but productivity deteriorates due to production interruption
Solution Approach 1:
The tray retrieving unit is positioned at the component pickup position in advance before the operator needs to access the tray housing portion. This preliminary positioning creates a safe barrier that allows tray exchange to proceed without stopping the mounting operations in other parts of the device
Solution Approach 2:
The device maintains continuous production by allowing tray exchange operations to occur without stopping the mounting heads. The door lock mechanism enables the operator to exchange trays while the mounting operations continue uninterrupted in other areas, eliminating production interruptions
Data Source
AI summary
A tray feeder includes tray supply mechanisms and arranged in parallel. Each of the tray supply mechanisms has a function of retrieving a tray from a tray housing portion by a tray retrieving unit, and transferring the pallet up to a component pickup position set in the vicinity of a height at the upper end of the tray housing portion. A lock state of a door by a door lock mechanism is released only in a state where the tray retrieving unit is located at the component pickup position and blocks an interior of the tray feeder from a head transfer space in which the mounting head transfers.