Sliding Hoisting Frame for Single-Operator Reinforcement Mat Lifting
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Solution Overview
Problem
Existing hoisting devices for steel reinforcement mats require multiple operators and can damage the substrate during decoupling, making them inefficient and unsafe for lifting and placing mats.
Innovation Solution
A hoisting frame with supporting elements that slide through the meshes of the reinforcement mat, allowing single-person operation and safe lifting without substrate damage, using adjustable dimensions and hydraulic or magnetic assistance for secure clamping and unclamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If flexible elements are bent for coupling and decoupling, then the steel reinforcement mat can be lifted and placed, but the substrate may be damaged during decoupling
Solution Approach 1:
The coupling mechanism is divided into two independent parts: a fixed coupling element that remains stationary and a movable coupling element that travels with the steel reinforcement mat. This segmentation allows the mat to be coupled and decoupled without bending flexible elements, eliminating substrate damage while maintaining operational ease.
Solution Approach 2:
A guide element acts as an intermediary between the movable coupling element and the steel reinforcement mat. The guide element guides the movable coupling element along a predetermined path, enabling smooth coupling and decoupling operations without direct contact between the coupling elements and the substrate, thus preventing substrate damage.
2Reliability
If two people operate the hoisting device, then the steel reinforcement mat can be lifted safely, but more workers are needed and movement between locations is required
Solution Approach 1:
The hoisting device is designed with self-aligning and self-latching characteristics. The fixed and movable coupling elements automatically align with the steel reinforcement mat corners and engage securely without requiring multiple operators. The device serves itself by using the weight and geometry of the mat to ensure proper coupling and lifting safety.
Solution Approach 2:
The coupling and lifting functions are merged into a single integrated mechanism. The movable coupling element combines the functions of positioning, coupling, and lifting engagement in one component, eliminating the need for separate operations and reducing the number of operators required while maintaining safety.
3Device complexity
If the hoisting device uses fixed coupling elements, then the structure is simple, but the device cannot adapt to different mat sizes and positions
Solution Approach 1:
The coupling mechanism transitions from a fixed structure to a dynamic system where the movable coupling element can travel along the guide element to different positions. This dynamic capability allows the device to adapt to various steel reinforcement mat sizes, shapes, and stacking configurations while maintaining a relatively simple overall structure.
Solution Approach 2:
The movable coupling element serves multiple functions: it can couple with different mat configurations, adjust to various positions along the guide element, and work with different mat sizes. This multi-functionality is achieved through a single adjustable component rather than multiple specialized elements, maintaining structural simplicity while enhancing versatility.
Data Source
AI summary
A device for lifting a steel reinforcement mat includes a grid of parallel rods in a first direction and, placed thereon and fastened permanently, parallel rods in a second direction, each according to a predetermined mesh width. The device has a hoisting frame suitable for being secured to a hoist. The hoisting frame has supporting elements on opposite sides positioned in such a way that when the hoisting frame rests on an uppermost steel reinforcement mat of a stack thereof, each supporting element is located in a respective mesh. The supporting elements are configured to slide in the first direction in such a way that during lifting, the supporting elements each support with a respective supporting surface exclusively rods in the second direction of exclusively the uppermost steel reinforcement mat. The supporting elements on the opposite sides slide away in the opposite direction to each other.