Overhead Rail Mark Printing with Encoder-Guided Positioning
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Solution Overview
Problem
Manual mark printing on driving rails of overhead hoist transports is inefficient, requiring multiple personnel, leading to accuracy issues and potential safety hazards due to the need for manual operation.
Innovation Solution
An automated mark printing device with a driving unit, printing unit, data processing unit, encoder unit, and control unit that prints marks on the driving rail, ensuring accurate placement and type of marks, and includes a cover with a pump and filter to manage particle scattering and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual mark printing using a rolling tower is employed, then the mark printing operation can be performed, but a large number of personnel are required and work time increases
Solution Approach 1:
The patent replaces the manual mechanical rolling tower system with an automated mark printing device that moves along the driving rail using a driving unit. The automated device includes a printing unit with print head, cover, pump, and filter, controlled by a control unit that coordinates the driving unit's movement and the printing unit's operations, eliminating the need for manual mechanical operations.
Solution Approach 2:
The automated mark printing device performs the entire mark printing operation autonomously. The driving unit self-propels the device along the driving rail, the encoder unit self-monitors position and driving distance, the printing unit self-adjusts to print at correct positions, and the pump-filter system self-manages particle collection, all under automatic control without human intervention.
2Extent of automation
If manual mark printing using a rolling tower is employed, then the mark printing operation can be performed, but accuracy of mark printing deteriorates
Solution Approach 1:
The encoder unit provides real-time feedback on the current position and driving distance of the driving unit along the driving rail. The control unit receives this feedback and uses it to precisely control when and where the printing unit activates, ensuring marks are printed at the exact required positions with high accuracy.
Solution Approach 2:
The automated printing system replaces manual positioning and printing operations with computer-controlled mechanisms. The driving unit's automated movement along the rail and the printing unit's precisely controlled activation eliminate the positioning errors and inconsistency inherent in manual operations.
3Extent of automation
If manual operation with rolling tower is used, then mark printing can be performed, but safety accidents may occur when vehicle malfunctions
Solution Approach 1:
The automated mark printing device performs the entire operation autonomously without requiring workers to be present in the rolling tower. The driving unit self-propels, the printing unit self-activates at correct positions, and the pump-filter system self-operates, completely eliminating human exposure to potential safety hazards from vehicle malfunctions.
Solution Approach 2:
The patent replaces the manual mechanical rolling tower system with an automated vehicle-mounted printing system. This substitution removes human operators from the potentially hazardous environment near the driving rail and vehicle, eliminating safety risks associated with manual operation.
4Productivity
If automated mark printing device is used, then productivity and accuracy are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single integrated automated mark printing device. The driving unit, encoder unit, printing unit, cover, pump, and filter are merged into one coordinated system that performs positioning, monitoring, printing, and particle management simultaneously, reducing the need for separate manual operations and equipment.
Solution Approach 2:
The automated mark printing device is designed as a multi-functional system. The driving unit provides both propulsion and positioning functions, the encoder unit simultaneously monitors position and driving distance, and the pump-filter system handles both particle collection and environmental control, making each component serve multiple purposes to reduce overall system complexity.
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 automated system reduces human effort, enhances mark accuracy, and minimizes safety risks by enabling quick and precise printing of marks on the driving rail, while maintaining a clean environment by managing particle scattering and collection.
Implementation Method 1
a pump circulating air inside the cover through a passage passing through the cover
Implementation Method 2
a filter disposed on the passage and collecting the particles contained in the air
Data Source
AI summary
A mark printing device includes a driving unit driving along a driving rail of an overhead hoist transport, a printing unit being configured to print on the driving rail a mark for guiding a motion of a vehicle, a data processing unit receiving design data including design information of the driving rail and first information on a position and type of the mark from a server, an encoder unit being configured to calculate a rotation amount of a servo motor provided in the driving unit to detect a current position of the driving unit and a driving distance of the driving unit, and a control unit being configured to control the driving unit and the printing unit to print the mark on the driving rail by using the design data and second information on the current position and the driving distance of the driving unit.