Gripping Device Outer Bag Rupture Detection
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Solution Overview
Problem
The existing gripping devices face issues with the outer bag rupturing due to abrasion or incision, leading to exposure of the inner bag, which can result in breakage when the work comes into direct contact, making it difficult to detect the rupture, especially when the outer bag is dirty, causing production line stoppages.
Innovation Solution
A gripping device with an abutment member featuring an inner bag filled with particulate matter and an outer bag made of aramid fiber, where a light-emitting portion is integrated between the reverse face of the outer bag and the surface of the inner bag, allowing for easy detection of outer bag ruptures through light emission, independent of dirt accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the outer bag is made from durable aramid fiber woven cloth, then the durability and abrasion resistance is improved, but the ability to visually detect holes or breaks becomes difficult when dirt adheres to the surface
Solution Approach 1:
The patent applies a light-emitting material (fluorescent or phosphorescent) to the outer bag surface that changes its optical properties by emitting light when exposed to ultraviolet light. This allows holes or breaks in the outer bag to be visually detected by observing light emission patterns, even when dirt is present on the surface. The light-emitting property provides a consistent visual reference that is not obscured by dirt accumulation.
2Productivity
If the outer bag is used repeatedly for gripping operations, then productivity is improved, but the outer bag may develop holes due to abrasion and incision
Solution Approach 1:
The light-emitting material provides visual feedback about the condition of the outer bag. When holes or breaks develop during repeated use, the light emission pattern changes, allowing operators to detect damage and replace the outer bag before it causes failure of the inner bag or workpiece. This feedback mechanism enables proactive maintenance while maximizing productive use of the outer bag.
3Ease of operation
If visual observation is used to detect holes in the outer bag, then the detection process is simple, but it becomes ineffective when dirt adheres to the outer bag surface
Solution Approach 1:
The light-emitting material transforms the detection method from relying on visual contrast of holes against the bag surface to observing light emission patterns. When ultraviolet light illuminates the outer bag, holes appear as dark regions where light does not emit, providing high-contrast visual indicators that are not obscured by dirt. This maintains simplicity while dramatically improving detection accuracy.
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 light-emitting portion enables visual detection of outer bag ruptures in a dark environment, preventing inner bag breakage and allowing for timely maintenance, thereby avoiding production line stoppages.
Implementation Method 1
the light-emitting portion emits light in response to ultraviolet light
Implementation Method 2
the light-emitting portion is constituted by a light storage member
Data Source
AI summary
A gripping device is equipped with an abutment member that is annexed on a region of a gripping portion that abuts on a work. The abutment member is equipped with an inner bag that is made of a material having elasticity, a particulate matter with which the inner bag is filled, and an outer bag that covers the inner bag. The particulate matter is hardened while being deformed into a shape matching a contour of the work by increasing a ratio of a volume of the particulate matter to an inner volume of the inner bag with the work gripped by the gripping portion. A reverse face of the outer bag and a surface of the inner bag have a light-emitting portion therebetween. Thus, a rupture created in the outer bag can be detected, and the breakage of the inner bag can be obviated.