FOUP Clamping Mechanism for Space-Saving Integrated Docking
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Solution Overview
Problem
Existing clamping mechanisms for FOUPs occupy valuable space below the mounting base and require a two-stage operation for clamping and docking, increasing cycle time and limiting their applicability.
Innovation Solution
A clamping mechanism that uses a plate-like first and second mounting base with a rotatably supported clamp lever, where the clamping pawl is actuated by an elastic member, allowing clamping during the docking operation without the need for actuators like air cylinders or motors below the mounting base, thus freeing up space and integrating movement for efficient docking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an actuator such as an air cylinder or motor is installed below the mounting base to actuate the clamping pawl, then the clamping mechanism can effectively clamp the FOUP, but the space below the mounting base is occupied and cannot be effectively used
Solution Approach 1:
The actuator is extracted from the space below the mounting base and relocated to the space above the mounting base. This allows the clamping mechanism to remain effective while freeing up the previously occupied space below the mounting base for other uses, directly resolving the space utilization problem.
Solution Approach 2:
The actuator arrangement is changed from a vertical configuration (below the mounting base) to a horizontal configuration (above the mounting base, extending in the left-right direction). This dimensional change allows the mechanism to maintain its clamping function while optimizing space utilization in the previously unused horizontal space.
2Reliability
If actuators are installed below the mounting base for clamping operation, then the FOUP can be securely fixed, but the cycle time increases due to required two-stage operation (clamping then docking)
Solution Approach 1:
The clamping operation and docking operation are merged into a single integrated operation. The mounting base is designed to move horizontally while the clamping pawl engages the FOUP during the same motion sequence, eliminating the need for separate clamping and docking stages and thereby reducing cycle time.
Solution Approach 2:
The clamping pawl is preliminarily positioned to engage the FOUP before the complete docking motion is executed. This preliminary engagement ensures secure fixation is established during the docking process itself, rather than requiring a separate prior clamping stage, thus optimizing the overall cycle time.
3Reliability
If actuators like air cylinders or motors are placed below the mounting base, then clamping function is achieved, but the mechanism complexity increases and applicability to various configurations is limited
Solution Approach 1:
The clamping mechanism utilizes the horizontal movement of the mounting base itself to drive the clamping action, rather than requiring a separate actuator. The mounting base's horizontal displacement automatically engages and disengages the clamping pawl with the FOUP, simplifying the overall mechanism and improving adaptability to different configurations.
Solution Approach 2:
The mounting base is given dual functionality: it performs both the docking function (moving the FOUP horizontally to the port door) and the clamping function (engaging the clamping pawl during movement). This multi-functionality reduces the need for separate actuators and components, thereby simplifying the mechanism and enhancing its universal applicability.
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 effective use of space below the mounting base, reduces cycle time by integrating clamping with docking, and simplifies the mechanism, making it applicable to a wider range of configurations while maintaining airtight and clean connections.
Implementation Method 1
a second member which acts on the clamp lever so as to displace the clamping pawl downward
Data Source
AI summary
The carrier base 3 is movably installed at the upper part of the FOUP opener main body 50b, and the clamping base 4 is movably installed at the upper part of the carrier base 3. The clamp lever 5a is rotatably supported by the rotating shaft 5c at the upper part of the clamping base 4, and the clamping pawl 5b is formed on the clamp lever 5a. The carrier base 3 and the FOUP 2 integrally move. The clamping pawl 5b, which is accommodated into the clamping recess 2h, presses the clamped portion 2c from above to below, by which the FOUP 2 is fixed to the mounting base 51.