Remotely Operated Hook Block Rotation Mechanism
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Solution Overview
Problem
Existing hook block apparatuses require manual operation or the use of tag lines for rotational positioning of suspended loads, which poses health and safety risks due to the need for operators to be in close proximity to the load, and can result in unintended rotation and entanglement issues.
Innovation Solution
A hook block apparatus with a remotely operable rotation mechanism, comprising a motor-driven gear system and a rotation sensor, allowing for precise rotational positioning of the hook member and selective control over rotational movement of the suspended load from a safe distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation or tag lines are used for rotational positioning, then the load can be rotated, but operators must be in close proximity to the load which creates health and safety risks
Solution Approach 1:
The patent replaces the manual mechanical operation system (tag lines and manual handling) with an automated motor-driven rotation system. The motor (42) is coupled to the hook member (30) through a bearing arrangement (32), enabling automated rotational positioning without requiring operators to physically interact with the load or be in close proximity, thereby eliminating the safety hazards associated with manual operation.
2Ease of operation
If tag lines are used for rotation control, then the load can be manoeuvred, but the tag lines can become wrapped around operators or entangled with other articles
Solution Approach 1:
The patent extracts the rotation control function from the manual tag line system and integrates it directly into the hook block apparatus. The motor (42) and bearing arrangement (32) are built into the hook block, allowing the rotation function to be performed by the apparatus itself rather than by external tag lines, thereby eliminating the entanglement and wrapping hazards that tag lines create.
3Adaptability or versatility
If the hook member is freely rotatable, then the load can rotate freely, but unintended rotation occurs which is difficult to control
Solution Approach 1:
The patent implements a dynamic rotation control system where the bearing arrangement (32) allows the hook member (30) to rotate freely when required, but the motor (42) provides active control to prevent or correct unintended rotation. The system can selectively engage or disengage rotation control based on operational conditions, providing both rotational freedom when needed and stability when required.
4Extent of automation
If a motor-driven rotation system is implemented, then remote rotational positioning is enabled, but the device complexity increases
Solution Approach 1:
The patent integrates the motor (42) and bearing arrangement (32) into the existing hook block structure, allowing the same apparatus to perform both lifting functions (through the sheave assembly) and rotation functions (through the motor-driven system). This multi-functionality reduces the need for separate devices and minimizes overall system complexity despite adding automation capabilities.
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 safer and more controlled rotational positioning of suspended loads from a remote location, reducing the risk of accidents and operational hazards associated with manual operation or tag lines, while allowing selective control over rotational movement.
Implementation Method 1
a motor which has an output shaft coupled to the first gear such that operation of the motor causes rotation of the hook member
Implementation Method 2
the hook member is rotatably connected to the lower portion via a bearing arrangement
Data Source
Figure 1(a)~1(b)
Figure 2
AI summary
A hook block apparatus(10) comprising: an upper portion (12) comprising a sheave assembly (20) for receiving a lifting rope of a hoisting device; a lower portion (14) fixedly connected to the upper portion (12); a hook member (30) which is rotatably connected to the lower portion (14); and rotation means (40, 42) for rotating the hook member relative to the lower portion about a vertical axis, wherein the rotation means is selectively operable from a remote location.