Swiveling Bobbin Winding Device Force Measurement
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Solution Overview
Problem
Existing bobbin removal methods in winding devices require high manual effort or complex devices due to the increasing weight and pressing force of the bobbin during winding, making it difficult to lift a full bobbin weighing up to 25 kg.
Innovation Solution
A method and device that utilize a force measurement unit to determine the direction of a manually applied force, allowing a controller to swivel the bobbin frame and reduce the lifting force required, using a drive with self-locking gears to maintain the bobbin's position, enabling easy bobbin exchange with minimal manual effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual lifting force is applied to remove the bobbin, then the bobbin can be lifted from the backing roller, but high manual effort is required due to the bobbin weight of up to 25 kg
Solution Approach 1:
The patent applies counterweights to compensate for the bobbin's weight during removal. The counterweight system balances the gravitational force acting on the bobbin, reducing the manual effort required to lift and remove the bobbin from the retaining arms and backing roller.
Solution Approach 2:
The patent introduces a lever as an intermediary mechanical element between the operator and the bobbin. This lever provides mechanical advantage, allowing the operator to apply smaller forces over longer distances to achieve the same lifting effect, thereby reducing the perceived manual effort.
2Stress or pressure
If counterweights are used to hold pressing forces constant, then the pressing force on the bobbin surface is reduced, but the device complexity increases
Solution Approach 1:
Counterweights are integrated into the existing retaining arm structure to continuously balance the pressing force generated by the bobbin's weight during winding. This passive compensation system maintains constant pressing force without requiring active control mechanisms, minimizing the increase in device complexity.
3Ease of operation
If a lever is used for manual swiveling, then the bobbin can be swiveled relative to the backing roller, but high manual force must be applied
Solution Approach 1:
A lever is positioned to provide mechanical advantage during the swiveling operation. The lever acts as an intermediary that amplifies the operator's input force, reducing the effort required to overcome the bobbin's weight and friction during swiveling motion relative to the backing roller.
Solution Approach 2:
The system transitions from static force application to dynamic force application during swiveling. The lever enables the operator to apply force progressively during the motion, taking advantage of the changing mechanical advantage throughout the swiveling arc, rather than requiring peak force throughout the entire motion.
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
Enables effortless bobbin removal and exchange by reducing the manual lifting force needed, ensuring the bobbin is securely positioned and allowing for automatic reorientation of the bobbin frame, thus simplifying the process and reducing operator strain.
Implementation Method 1
A force measurement unit is used to measure a force effect that acts on at least one retaining arm
Implementation Method 2
using a drive with self-locking gears to maintain the bobbin's position
Implementation Method 3
the two retaining arms are mounted on a shared swivel arm having a swivel axis
Data Source
AI summary
A winding device and associated method for swiveling a bobbin in the winding device during an interruption of a winding operation are provided, wherein the bobbin rests on a backing roller and is formed on a bobbin tube onto which a thread is wound. The bobbin tube is rotatably held between holders on two retaining arms mounted on a common swivel arm having a swivel axis. With force measurement unit, one of intrinsic weight of the bobbin or a force effect that acts on the retaining arms due to contact of the bobbin with the backing roller is measured. A manual force is transmitted into at least one of the retaining arms in a force direction that is determined by evaluating the force measurement unit. With a drive that is operably configured with the swivel arm, the swivel arm is swiveled in the force direction.