Defect Detection Device With Swing Arm For Bag Making
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Solution Overview
Problem
Existing defect detection systems in bag making apparatuses are prone to damaging sheet panels due to constant contact with a contactor, such as a roller, during the detection process.
Innovation Solution
A defect detecting device with a detection unit that includes a support, an arm swingable around a swing shaft, and a sensor to detect arm displacement. The device has a movement mechanism to position the detection unit away from the feed plane during the feed phase and into contact during the pause phase, minimizing contact and potential damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a contactor is kept in constant contact with the sheet panel for defect detection, then defect detection capability is improved, but the sheet panel is likely to be damaged
Solution Approach 1:
The detection unit is made movable between a detection position (where contactors touch the sheet panel) and a retracted position (where contactors are away from the sheet panel). This dynamic positioning allows the system to maintain contact only when needed for detection, preventing constant contact damage while ensuring reliable defect detection when the unit is at the detection position.
Solution Approach 2:
The detection unit operates in periodic cycles, moving to the detection position during pause phases to perform defect detection, then retracting during feed phases. This periodic engagement ensures defect detection capability is maintained while minimizing contact time and preventing continuous damage to the sheet panel.
2Object-affected harmful factors
If the detection unit is retracted during feed phase, then sheet panel damage is reduced, but defect detection timing is constrained
Solution Approach 1:
The detection unit is positioned to perform defect detection during the pause phase before the sheet panel enters the feed phase. By completing detection before feeding begins, the system ensures defect identification occurs at an optimal time without interfering with the continuous feed operation, thus minimizing both damage and timing conflicts.
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 effectively detects defects in bag making without causing damage to the sheet panels, as the contactors only engage during the pause phase, reducing the risk of damage and allowing for accurate defect detection.
Implementation Method 1
a sensor for detecting a displacement of the arm relative to the support
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
This defect detecting device comprises a detecting unit and a movement mechanism. The detecting unit comprises a support, an arm that is supported by the support so as to be pivotable around a pivot axis, and a sensor for detecting the relative position of the arm to the support. The arm comprises a contact. The movement mechanism holds the contact at a distance from a conveying plane while a body material is being conveyed, and moves the contact to the conveying plane and away from the conveying plane while the body material is stopped. The defect detecting device additionally comprises a determination unit that determines whether there is a defect in bag-making on the basis of data from a sensor.