Handling Bag Strap Loop for Wear Detection
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Solution Overview
Problem
Handling bags with gripping handles experience wear and tear issues at the points of contact with lifting devices, leading to a risk of rupture and potential accidents if not detected in time, with existing solutions like local reinforcement being unsatisfactory as they hide the wear area and only defer the risk of breakage.
Innovation Solution
The addition of additional straps forming loops parallel to the gripping handles, which are secured to the side walls but not at the area of cooperation with the lifting device, providing a mechanical strength relay in case of handle breakage, ensuring safe handling by maintaining the gripping handle and loop as a single unit during normal use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the gripping handle is locally reinforced by increasing thickness, then the mechanical resistance of the strap is improved, but the wear area is hidden and the risk of breakage is only deferred
Solution Approach 1:
The strap is divided into two functional parts: a reinforced section for mechanical strength and a non-reinforced section for wear detection. This segmentation allows the handle to have both high strength where needed and visible wear areas for monitoring, resolving the contradiction between strength and detectability.
2Reliability
If additional straps are added to provide a mechanical relay, then the safety is improved, but the device complexity increases
Solution Approach 1:
The additional strap system is designed to be dynamically inactive during normal operation but automatically activates when the primary handle fails. This dynamic behavior provides safety redundancy without adding operational complexity, as the additional straps remain passive until needed.
3Ease of operation
If the additional loop is positioned close to the gripping handle, then the jerk is reduced when the loop takes over, but the user may inadvertently insert the lifting device into the wrong loop
Solution Approach 1:
The gripping handle and additional loop are given different local characteristics: the handle has reinforcement and specific positioning for active use, while the loop has a distinct configuration for passive standby. This local differentiation ensures the user can easily distinguish between the two, preventing incorrect insertion while maintaining smooth load transfer.
Data Source
Figure 1~2
AI summary
The invention relates to a handling bag including: a shell which is made, in particular, of a synthetic textile, which has an upper opening, a bottom (6), and sidewalls (2-5), and which is to constitute the container for products to be handled, wherein said products are provided either discretely or in bulk; and means for securing the bag and lifting equipment, consisting of straps (8) rigidly connected at least to the sidewalls (2-5) of the shell and defining gripping handles (9) which are to engage with said lifting equipment. The bag further includes additional straps (10) rigidly connected to the straps (8) constituting the securing means, which define loops (11) that are substantially parallel to the gripping handles (9) and the lengths of which are slightly greater than those of said handles, the loops (11) also being rigidly connected to the gripping handles (9) over a substantial portion of the length thereof, with the exception of the area in which the gripping handles (9) engage with the lifting equipment.