Pivoting Tape Winder Arm for Accurate Off-Axis Wrapping
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Solution Overview
Problem
In existing tape winding devices, the peeling force causes objects to be displaced from the axis during tape winding, leading to improper winding and potential twisting of the object.
Innovation Solution
A tape winder design where a roll tape is held by an arm with a pivot shaft and an enlarged diameter curved surface, allowing the arm to pivot and control the tape's tension, ensuring the tape is wound around the object without being pulled out, thereby suppressing displacement from the axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the tape is wound around the object using a rotating body, then the tape winding process is automated, but the object is displaced from the axis due to peeling force causing improper winding
Solution Approach 1:
The patent applies dynamics by making the arm movable rather than fixed. The arm can pivot around the rotation axis, allowing it to dynamically adjust its position in response to the peeling force. This dynamic adjustment enables the arm to move outward when peeling force acts on the tape, preventing the object from being displaced from the rotation axis, thus maintaining winding accuracy while preserving automated operation.
Solution Approach 2:
The patent changes the parameter of arm position from fixed to variable. By allowing the arm to pivot and change its radial position, the system can adapt to the varying peeling force during tape unwinding. The arm's position parameter adjusts automatically, enabling it to counteract the peeling force's effect on the object's position, thereby resolving the contradiction between automation and winding precision.
2Productivity
If the peeling force acts on the tape during winding, then the tape is peeled from the roll, but the object rotates and twists occur
Solution Approach 1:
The movable arm dynamically responds to peeling force by pivoting outward, which counterbalances the rotational moment caused by peeling force on the object. This dynamic adjustment prevents the object from rotating or twisting while the tape is being fed, maintaining both productivity and object orientation stability.
Solution Approach 2:
The arm acts as a counterbalancing mechanism. When peeling force tries to rotate the object, the arm's outward movement creates a counteracting moment that balances the peeling force's rotational effect, preventing object rotation and twisting while allowing continuous tape feeding.
3Device complexity
If the arm is fixed during rotation, then the structure is simple, but the tape is pulled out causing object displacement
Solution Approach 1:
The patent transitions from a fixed arm structure to a movable arm that can pivot. This dynamic structure allows the arm to adjust its position in response to peeling force, preventing tape pull-out and object displacement. The added complexity of the pivot mechanism is minimal compared to the significant improvement in winding position accuracy it achieves.
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 design achieves excellent tape winding performance by alternately managing the tape's tension, ensuring proper winding and preventing object displacement, resulting in improved tape winding efficiency.
Implementation Method 1
an enlarged diameter curved surface portion that comes into contact with the arm that pivots at a time of rotation. In an angle range in which the arm is in contact with the enlarged diameter curved surface portion, the arm is pushed in a rotation outward direction at the time of rotation
Data Source
AI summary
A roll tape 1 is held by a tip end portion of an arm 3 connected by a pivot shaft 4 fixed to a rotating body 5, and an enlarged diameter curved surface portion 6 is provided that comes into contact with the arm 3 that pivots at a time of rotation. In an angle range in which the arm 3 is in contact with the enlarged diameter curved surface portion 6, the arm 3 is pushed in a rotation outward direction at the time of rotation such that the tape stretched from the roll tape 1 to an object 9 is wound around the object 9 while being pulled out. In an angle range in which the arm 3 is not in contact with the enlarged diameter curved surface portion 6, the tape previously pulled out from the roll tape 1 is wound around the object 9 while being wound up on the object 9. By repeating this alternately, displacement of the object from the rotation axis is suppressed, and proper winding is performed.