Segmented Self-Adhesive Wire Harness Sheet for Spiral Winding
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Solution Overview
Problem
Self-adhesive wire harness sheets with adhesive on one surface cannot be wound in a spiral shape around electric wire bundles due to adhesive interference, and double-sided adhesive sheets cannot be stored efficiently due to adhesive contact issues.
Innovation Solution
A wire harness sheet design with a first self-adhesive layer on one surface and a second self-adhesive layer on another, where the lengths and positions of these layers allow for overlapping storage and spiral winding without adhesive contact, using a sheet base material with specific adhesive regions and unformed adhesive portions to facilitate easy handling and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a self-adhesive layer is provided on only one surface of the sheet base material, then the sheet can be bonded to itself, but the sheet cannot be wound in a spiral shape around an electric wire bundle due to adhesive interference
Solution Approach 1:
The adhesive layer is segmented into multiple regions with different properties: a first adhesive region that bonds to the sheet base material, a second adhesive region that remains non-adhesive for contact with the electric wire bundle, and a third adhesive region that bonds to itself. This segmentation allows the sheet to simultaneously achieve self-bonding capability and spiral winding capability around the wire bundle without adhesive interference.
2Adaptability or versatility
If a double-sided self-adhesive sheet is used to enable spiral winding, then the sheet can be wound in a spiral shape, but the sheet cannot be stored in a rolled up or overlapping manner due to adhesive contact issues
Solution Approach 1:
Different regions of the adhesive layer are assigned different local qualities: the first and third adhesive regions have bonding properties for self-adhesion, while the second adhesive region has non-adhesive properties for storage. This local quality differentiation allows the sheet to be stored in rolled-up or overlapping manners without unwanted adhesive bonding, while still enabling spiral winding capability.
3Ease of operation
If end edge portions are bonded together to enable sheet usage, then the sheet can be used in wire harness, but the joining margin cannot protrude in routing portions
Solution Approach 1:
The adhesive layer is designed with dynamic functionality through its multiple regions: the self-bonding capability allows flexible bonding of end edges for various configurations, while the non-adhesive second region accommodates routing portions where margin protrusion needs to be controlled. This dynamic design enables the sheet to adapt to different bonding configurations without rigid constraints on margin protrusion.
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
Enables efficient storage and winding of wire harness sheets in an overlapping manner without release paper, improving handling and environmental sustainability by preventing adhesive fixation to the wire bundle and allowing for easy correction of the wire bundle position, enhancing the quality and workability of the wire harness.
Implementation Method 1
a first self-adhesive layer formed on one surface in a first common region of the sheet base material... a second self-adhesive layer formed on at least part of one surface in a second common region of the sheet base material
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3
AI summary
Provided is a wire harness sheet that can be stored in an overlapping manner without using release paper and can be wound in a spiral shape around an electric wire bundle. A wire harness sheet 11 includes a first self-adhesive layer 15 of a sheet base material 13, the first self-adhesive layer 15 being is formed on one surface of a first common region 27, and the other surface of the first common region 27 becoming a first adhesive layer unformed portion 29; and a second self-adhesive layer 17 that is formed on at least part of one surface of a second common region 31.