Container Handling Vehicle Guide Assembly for Earlier Rail Movement
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Solution Overview
Problem
Existing container handling vehicles with cantilevered sections experience inefficiencies due to the need to wait until the lifting frame is fully raised and in contact with the cantilevered section before moving on the rail system, leading to cumulative time delays in operations.
Innovation Solution
The implementation of a lifting frame guide assembly with a first guide device on the lifting frame and a second guide device slidably connected to the sidewall via a vertically extending rail, which interacts to restrict horizontal movement of the lifting frame relative to the vehicle body, allowing movement on the rail system as soon as the lifting frame is lowered above the rail system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the lifting frame is allowed to move horizontally freely during vehicle movement, then the vehicle can move on the rail system as soon as the lifting frame is lowered above the rail system, but the lifting frame may experience unwanted horizontal movement due to vehicle acceleration and movement
Solution Approach 1:
The guide assembly transitions from a static constraint (fixed guide pins in the lifting frame) to a dynamic system where the second guide device moves vertically along the rail while maintaining horizontal guidance. This allows the system to adapt between two states: constrained during lifting operations and free during vehicle movement, resolving the contradiction between stability and mobility
Solution Approach 2:
The guidance function is segmented between two independent components: the first guide device (guide pins) attached to the lifting frame and the second guide device attached to the vehicle body. This segmentation allows each component to perform its specific function independently - the first guide device provides horizontal reference while the second guide device provides vertical movement along the rail, enabling the lifting frame to be guided horizontally without restricting vehicle movement
2Stability of the object's composition
If the lifting frame is constrained to prevent horizontal movement, then the lifting frame remains stable during vehicle movement, but the vehicle must wait until the lifting frame is fully raised and in contact with the cantilevered section before moving on the rail system
Solution Approach 1:
The horizontal guidance function is extracted from the lifting frame itself and transferred to the guide assembly system. The first guide device (guide pins) on the lifting frame provides the horizontal reference, while the second guide device on the vehicle body provides the constraining action. This separation allows the lifting frame to be guided without requiring full raising contact with the cantilevered section, eliminating the time delay
Solution Approach 2:
The guide assembly acts as an intermediary mechanism between the lifting frame and the vehicle body. Instead of directly constraining the lifting frame to the vehicle body (which would require full raising), the guide pins and guide device interact through a defined path (vertically extending rail) to provide horizontal guidance during the lifting operation, enabling earlier vehicle movement
3Stability of the object's composition
If the lifting frame is fully raised to contact the cantilevered section before vehicle movement, then horizontal movement of the lifting frame is prevented, but cumulative time delays occur in operations
Solution Approach 1:
The guide assembly is configured to provide horizontal guidance action before the lifting frame is fully raised to contact the cantilevered section. The vertically extending rail and guide device establish horizontal constraints during the lifting operation itself, preventing the need to wait for full raising contact, thus maintaining stability while improving throughput
Solution Approach 2:
The guide assembly maintains continuous horizontal guidance throughout the lifting operation and vehicle movement transition. The guide pins remain engaged with the guide device along the vertically extending rail, providing uninterrupted horizontal stability from the start of lifting through vehicle movement, eliminating idle waiting time and maintaining continuous productive action
Data Source
AI summary
A container handling vehicle for lifting a storage container from an underlying framework structure includes a container lifting assembly for lifting the storage container and a vehicle body. The container lifting assembly includes a lifting frame for releasable connection to a storage container, a lifting shaft assembly, and a plurality of lifting bands. The lifting bands are connected to the lifting frame and the lifting shaft assembly such that the lifting frame may be raised or lowered by operating the lifting shaft assembly. The vehicle body includes a sidewall and a cantilevered section from which the lifting frame depends. The cantilevered section extends laterally from an upper end of the sidewall. The container lifting assembly features a lifting frame guide assembly comprising a first guide device and a cooperating second guide device. The first guide device is provided on the lifting frame. The second guide device is slidably connected to the sidewall via at least one vertically extending rail, such that the second guide device can move in a vertical direction relative to the sidewall. The first guide device and the second guide device are arranged to interact with each other when the lifting frame is adjacent the sidewall, such that horizontal movement of the lifting frame relative to the vehicle body is restricted.