Plotter Pinch Roller Mechanism with Rail Window
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Solution Overview
Problem
Existing plotter pinch roller mechanisms face challenges in maintaining visibility of the pinch roller, especially when using a rail with high rigidity, and are not suitable for both consumer-grade and large-sized cutting plotters due to component complexity and cost.
Innovation Solution
A plotter pinch roller mechanism featuring a rail with a window in the slider that exposes the pinch roller diagonally upward, allowing for improved visibility and a compact, cost-effective design that includes a spring for biasing the roller support member and a pressing release mechanism with an operating lever.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rail with high rigidity is used to support the pinch roller mechanism, then the structural stability and pressing force transmission are improved, but the visibility of the pinch roller deteriorates because the rail obstructs the view
Solution Approach 1:
The rail structure is segmented into multiple sections with strategic openings. The rail includes a first section with a first opening and a second section with a second opening, allowing the pinch roller to be visible through these openings while maintaining the overall structural integrity and rigidity of the rail for supporting the pinch roller mechanism.
Solution Approach 2:
The openings in the rail act as intermediaries that allow light to pass through, enabling visibility of the pinch roller. The rail structure serves as both an obstacle (maintaining rigidity) and a mediator (providing visibility through openings), resolving the contradiction between structural strength and detectability.
2Ease of operation
If a complex cam member and lever mechanism is used to control the pinch roller, then the pressing and release functions are achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The complex cam member and lever mechanism is extracted and replaced with a simpler direct pressing mechanism. The pinch roller is directly pressable by a pressing member, eliminating the need for intermediate cam members and levers, thereby reducing device complexity while maintaining the pressing and release functions.
Solution Approach 2:
The pinch roller mechanism is designed to be self-operating through direct pressing. The pressing member can directly apply force to the pinch roller without requiring complex mechanical transmission, allowing the system to serve itself with minimal components and reduced operational complexity.
3Device complexity
If an axial member is used to transmit pressing force, then the structure is simplified, but the pressing force is weakened due to deflection at the center portion
Solution Approach 1:
The rail serves as an intermediary structure with high rigidity to transmit and amplify the pressing force from the pressing member to the pinch roller. The rail's rigid structure prevents deflection and ensures efficient force transmission, overcoming the weakness of simple axial members while maintaining structural simplicity.
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
The mechanism enhances visibility of the pinch roller even with a rigid rail, is compact and inexpensive, and can be integrated into both consumer-grade and large-sized cutting plotters, reducing the number of components and operational costs.
Implementation Method 1
a spring (39) arranged between the sliding member (16) and the roller support member (27, 28) and configured to bias the roller support member (27, 28) downward
Implementation Method 2
a pressing release mechanism (45) including an operating lever (46) swingably supported by the sliding member (16) and configured to push the roller support member (27, 28) upwards against a spring force of the spring (39) by an operating force applied to the operating lever (46)
Data Source
AI summary
The pinch roller mechanism comprises: a slider which is supported by a rail movably in a left-right direction; a roller support member which moves in an up-down direction while being supported by the slider, and a pinch roller which is rotatably supported by the roller support member. The slider includes a window that exposes the pinch roller diagonally upward on the upstream side in the conveyance direction.