Cable-Suspended Tree Girdling Device for Stable Forest Thinning
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Solution Overview
Problem
In poorly managed forests, thinning trees requires significant operator effort, and excessive removal of narrow trees can lead to instability, making them vulnerable to wind and snow, potentially causing them to die.
Innovation Solution
A cable use system comprising support posts, a winding device, a hoisting device, and a cutting device that allows for the stable facilitation of tree growth by reducing the effort required for thinning, using a cutting unit to girdle trees by cutting their surface all around, thereby reducing the number of trees that need to be removed at once.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If narrow trees are excessively removed at a time during thinning, then operator effort is reduced, but the remaining trees become unstable and vulnerable to wind and snow
Solution Approach 1:
The cutting device segments the tree removal process into multiple stages by making incremental circumferential cuts around the tree trunk. Instead of removing trees all at once, the system cuts through the bark and cambium layer in segments, allowing controlled weakening of the tree over time while maintaining its structural integrity during the process.
Solution Approach 2:
The system performs preliminary cutting actions by making circumferential cuts around the tree trunk before complete removal. The cutting device creates preliminary incisions in the bark and cambium layer that progressively weaken the tree's structural support, preparing it for eventual collapse while maintaining stability during the process.
2Productivity
If traditional thinning methods are used, then tree removal is achieved, but significant operator effort and time are required
Solution Approach 1:
The invention replaces manual mechanical cutting operations with an automated cable-suspended cutting device. The system uses a winding device to suspend and position a powered cutting device around the tree trunk, eliminating the need for operators to manually climb trees or use hand tools, thereby dramatically reducing operation time and labor requirements.
Solution Approach 2:
The cutting device is self-positioning and self-executing. Once the cable system suspends the cutting device around the tree, the device autonomously performs the circumferential cutting operation without continuous human intervention. The winding device automatically positions the cutting head at appropriate heights and angles for efficient tree removal.
3Ease of manufacture
If manual thinning operations are performed, then tree cutting is achieved, but operator safety and effort are compromised
Solution Approach 1:
The cable system acts as an intermediary between the operator and the tree. The winding device suspends the cutting device from overhead cables, allowing operators to control the cutting operation from ground level rather than climbing into the tree canopy. This intermediary cable mechanism eliminates the need for operators to be in hazardous positions while maintaining precise control over the cutting process.
Data Source
AI summary
A cable use system includes a plurality of support posts, a cable supported by the support posts, a winding device configured to wind the cable, a hoisting device coupled to the cable and configured to move in an air when the cable is wound by the winding device, and a cutting device hung from the hoisting device. The cutting device includes a cutting unit configured to cut a surface side of a tree all around.