Cable Tray Hold-Down Clamp With Visual Expansion Orientation
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Solution Overview
Problem
Existing cable tray systems face challenges in correctly installing combination hold-down members, which are crucial for both clamping and expansion modes, especially in applications where visual verification is difficult, leading to potential misapplication and issues like buckling or failure due to inadequate relative movement between the cable tray and support bars.
Innovation Solution
A combination hold-down clamp and expansion guide apparatus featuring a main body with distinct indicia for visible indication of tight and loose clamped orientations, incorporating expansion and fixed clamp portions with visible signals, such as color markings, to ensure proper installation and functional application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If combination hold-down members are used to provide both clamping and expansion modes, then the parts list is reduced and economy is improved, but the difficulty of correctly installing and verifying the proper mode increases
Solution Approach 1:
The patent applies color coding to visually distinguish between clamping and expansion modes. The hold-down member includes a first color (e.g., red) indicating clamping mode and a second color (e.g., green) indicating expansion mode. This color indication system allows installers to quickly verify the correct installation mode without complex inspection procedures, directly resolving the contradiction between using fewer parts and maintaining easy verification.
2Adaptability or versatility
If expansion clamps are used to permit relative movement for thermal expansion, then the cable tray can accommodate temperature variations, but the number of parts and installation complexity increases
Solution Approach 1:
The patent integrates both clamping and expansion functions into a single hold-down member. The member can be installed in two different modes: a clamping mode that rigidly secures the cable tray, and an expansion mode that permits relative movement for thermal expansion. This multi-functionality eliminates the need for separate fixed clamps and expansion clamps, reducing the total number of parts while maintaining both adaptability functions.
Solution Approach 2:
The hold-down member incorporates a dynamic design that allows it to function in two states. The member includes features such as a movable portion or adjustable geometry that enables it to transition between a rigid clamping configuration and a flexible expansion configuration. This dynamic capability allows a single part to adapt to different installation requirements without increasing overall system complexity.
3Reliability
If visual indicia are added to indicate installation mode, then correct installation can be verified even in hard-to-inspect applications, but the device complexity increases
Solution Approach 1:
The patent incorporates visual indicia in the form of color coding directly into the hold-down member structure. The first color indicates clamping mode installation and the second color indicates expansion mode installation. These color indications are integrated into the design of the member itself rather than being separate components, allowing reliable verification of correct installation while minimizing increases in device complexity.
Data Source
AI summary
A hold-down apparatus (10) for holding an associated cable tray on an associated support rod member includes a main body portion (100), U-shaped expansion and fixed clamp portions (102, 104), and first and second indicia (330, 332). The expansion clamp portion (102) is configured to loosely engage hold an associated bead of the cable tray relative to the associated support rod member and the fixed clamp portion (104) tightly holds the members together. The first indicia (330) is carried on a side of the main body portion (100) opposite from the fixed clamp portion (104) and the second indicia (320) is carried on a side of the main body portion (100) opposite from the expansion clamp portion (102). The indicia (330, 332) are visually distinguishable from the main body portion (100) for indicating an orientation of the fixed and expansion clamp portions (102, 104) relative to the associated cable tray.