Exterior Member-Equipped Wire with Perforated Bendable Portion
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Solution Overview
Problem
Existing methods for wrapping protective sheets around wires face issues with deformation and detachment due to reaction forces, making it difficult to maintain a small diameter and secure wrapping state.
Innovation Solution
Incorporating an easily bendable portion, such as a perforated line, into the sheet-like body portion of the exterior member, which reduces reaction forces and enhances the wrapping process by allowing for more flexible configuration and improved adhesion at the joining portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective sheet is wrapped around a wire using double-sided adhesive tape, then the sheet can be attached to the wire, but the reaction force causes the sheet to deform and increase in diameter, making it impossible to maintain a small wrapped diameter
Solution Approach 1:
The sheet is divided into a body portion and an easily bendable portion (with perforated lines), allowing the easily bendable portion to absorb reaction forces through controlled deformation while the body portion maintains its wrapped shape and small diameter
Solution Approach 2:
The easily bendable portion has modified physical properties (reduced bending stiffness through perforations) compared to the body portion, enabling it to yield under reaction forces while the body portion maintains structural integrity and small wrapped diameter
2Stability of the object's composition
If the reaction force of the protective sheet is greater than the adhesive force of the double-sided adhesive tape, then the sheet returns to its original state, but the adhesive tape at the wrapping-end portion detaches
Solution Approach 1:
The sheet is segmented into a body portion and an easily bendable portion, confining the deformation and reaction force absorption to the easily bendable portion while keeping the body portion stable and properly adhered
Solution Approach 2:
The easily bendable portion acts as an intermediary element between the sheet body and the wire, absorbing reaction forces and preventing them from transmitted to the adhesive tape at the wrapping-end portion
3Shape
If the protective sheet is made rigid to maintain shape, then the wrapped diameter can be maintained, but the sheet cannot be easily wrapped around the wire and the reaction force increases
Solution Approach 1:
Different portions of the sheet have different mechanical properties: the body portion is rigid to maintain wrapped diameter, while the easily bendable portion is flexible to enable easy wrapping and reduce reaction forces
Solution Approach 2:
The sheet is divided into functional segments with different rigidity characteristics, allowing simultaneous achievement of easy wrapping (through the flexible portion) and maintained shape (through the rigid body portion)
Data Source
AI summary
It is an object of the present invention to provide a technology that makes it possible to easily maintain the wrapped state of a sheet member around a wire. An exterior member-equipped wire includes a wire and an exterior member. The exterior member is formed by the sheet member being wrapped around the wire. The sheet member includes a sheet-like body portion formed to be able to be wrapped around the wire, and an easily bendable portion constituting a portion of the sheet-like body portion that extends along a circumferential direction of the wire and whose portion extending along an extension direction of the wire is formed to be more easy to bend than other portions of the sheet-like body portion.