Tension Transmitting Device for Drop Cables
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Solution Overview
Problem
Conventional methods for transmitting tension to drop cables are complex, time-consuming, and can damage the cables due to the use of tightly wound ropes, and existing methods for stringing and wiring other cables also face inefficiencies and complications.
Innovation Solution
A tension transmitting device with a covering body and a tension transmission belt that is easily attached and detached, featuring a slit for secure wrapping around the cable, allowing for efficient tension transfer without local pressure damage, utilizing a flexible belt that slides in the slit to reduce drawing resistance and ensure stable attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rope is tightly wound around the drop cable to transmit tension, then the tension transmission reliability is improved, but the cable may be damaged due to local pressure
Solution Approach 1:
The tension transmission device divides the contact interface into multiple segments: the covering body wraps around the cable to distribute pressure, the tension transmission belt is wrapped around the cable multiple times to increase contact area, and the slit structure segments the force transmission path. This segmentation distributes the local pressure over a larger area, preventing cable damage while maintaining reliable tension transmission.
Solution Approach 2:
The covering body acts as an intermediary between the tension transmission belt and the cable. It provides a protective interface that distributes the clamping force evenly around the cable, preventing direct concentrated pressure from the belt while still allowing effective tension transmission through friction.
2Reliability
If a rope is wrapped in a complex manner to prevent slippage, then the tension transmission stability is improved, but the operation time and complexity increase
Solution Approach 1:
The tension transmission device employs self-service mechanisms where the tension itself tightens the belt around the cable through the slit structure, and the friction between the belt and cable automatically prevents slippage. The device self-adjusts and self-secures without requiring complex manual wrapping operations, reducing operation time while maintaining stability.
Solution Approach 2:
The device changes the physical parameters of the system by using a flexible belt with specific friction characteristics and a covering body with particular geometric properties. These parameter changes enable effective tension transmission with simpler operations compared to traditional rope wrapping methods.
3Force
If the rope is wrapped around the cable at high places, then the tension can be applied to the strung cable, but the workability and ease of operation deteriorate
Solution Approach 1:
The covering body and tension transmission belt are merged into a single integrated device that can be easily handled and installed at height. The compact combined structure reduces the number of separate components that need to be manipulated in difficult-to-reach locations, improving ease of operation while maintaining full tension application capability.
4Force
If a cable gripping tool is used to clamp the wire, then the tension transmission is effective, but the cable may be damaged and the device complexity increases
Solution Approach 1:
The device uses a flexible covering body and tension transmission belt instead of rigid metal clamps. These flexible components conform to the cable surface, distributing pressure evenly and avoiding the localized high stress concentrations that occur with rigid gripping tools, thereby preventing cable damage while maintaining effective tension transmission.
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 device allows for efficient and stable tension transmission to drop cables, reducing the time required for stringing or wiring operations and preventing damage to the cables by minimizing local pressure, thus enhancing work efficiency and cable integrity.
Implementation Method 1
the rope f is wrapped around the drop cable c at at least 3 positions spaced apart from each other... the wrapped portion of the rope f wrapped around the drop cable c is tightened around the drop cable c by the tension and fastens the drop cable c, and therefore the tension is reliably transmitted without slippage
Data Source
AI summary
A tension transmitting device includes a covering body placed over a target drop cable from a side thereof; and a tension transmission belt having a first end secured on a first end side of the covering body and a second end used as a free end, the tension transmission belt receiving the tension during stringing or wiring operation on a free end side thereof. The free end of the tension transmission belt extends from a secured portion thereof secured to the covering body so as to run on a covering surface side of the covering body and is wound around the drop cable. The covering body includes a slit provided on a second end side thereof, and the slit has a side receiving opening through which the tension transmission belt is received in a width direction.