Roll Sheet Material Dispenser with Cam-Driven Automatic Roll Switching
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Solution Overview
Problem
Existing dispensers for sheet material often get stuck during operation, requiring manual intervention to switch between rolls, indicating a need for an improved dispensing system that can seamlessly transition between rolls without operator assistance.
Innovation Solution
A method and dispenser design that involves a cam mechanism to pivotally lower and raise spindles, allowing for continuous dispensing from one roll while automatically positioning the second roll for use, with spindles sliding along vertically and transversely extending slots to maintain efficient roll switching without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single roll is dispensed at a time, then the dispensing mechanism is simple, but the operator must manually intervene to switch rolls causing the dispenser to get stuck
Solution Approach 1:
The cam mechanism dynamically changes the position of spindles during operation. As the first roll is dispensed, the cam automatically lowers the first spindle and raises the second spindle, enabling seamless transition between rolls without manual intervention while maintaining a relatively simple mechanical structure
Solution Approach 2:
The second roll is pre-positioned on the second spindle above the dispensing location before it is needed. When the first roll is depleted, the cam mechanism automatically lowers the first roll and raises the pre-positioned second roll into the dispensing position, eliminating the need for manual roll switching
2Productivity
If manual intervention is required to switch rolls, then the mechanism is simpler, but productivity decreases due to operator intervention
Solution Approach 1:
The dispenser performs self-service by automatically switching between rolls through the cam mechanism. As material is dispensed, the system autonomously monitors roll position and automatically transitions to the next roll without requiring operator intervention, thereby maintaining continuous productivity
Solution Approach 2:
The cam mechanism ensures continuous dispensing action by seamlessly transitioning between rolls. The automatic lowering of the first spindle and raising of the second spindle maintains uninterrupted material flow, eliminating downtime associated with manual roll switching
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 solution enables smooth and automatic transition between rolls, preventing sticking issues and allowing for continuous dispensing without operator intervention, enhancing the operational efficiency and usability of sheet material dispensers.
Implementation Method 1
lowering the first roll from the first location as the first sheet of material is being dispensed
Data Source
AI summary
A method of dispensing sheet material from two rolls includes dispensing a first sheet of material from a first roll of the material located at a first location, lowering the first roll from the first location as the first sheet of material is being dispensed, lowering a second roll of material onto a second location above the first location when the first roll has been lowered to a location below the first location, and dispensing a second sheet of material from the second roll. A dispenser allowing for dispensing from two rolls includes a first wall having a forward end, a second wall opposite and spaced apart from the first wall and a cam coupled to each wall.