Movable Top Frame for Tubular Film Packaging Safety
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Solution Overview
Problem
Existing packaging apparatuses for tubular films pose safety risks to operators during maintenance, as they require entering a dangerous work space to access and maintain the top frame and its components.
Innovation Solution
The apparatus allows the top frame to be moved from a working position to a maintenance position outside the work space, enabling operators to access and maintain the top frame without entering the work space, utilizing a hoist device with guide tracks and a motor-driven belt or chain system to facilitate this movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the top frame is fixed to the main frame, then the structure is stable and simple, but the operator must enter the work space for maintenance which is dangerous
Solution Approach 1:
The top frame is made movable relative to the main frame through a hoist device with guide tracks, allowing it to be dynamically positioned between a working position (above the work space) and a maintenance position (outside the work space). This dynamic capability enables operators to access the top frame from outside the dangerous work space while maintaining structural stability during packaging operations.
2Object-affected harmful factors
If the top frame is movable between working and maintenance positions, then operator safety is improved, but the device complexity increases due to hoist device and guide tracks
Solution Approach 1:
A hoist device serves as an intermediary mechanism between the top frame and the main frame, enabling controlled movement between working and maintenance positions. The hoist device includes a motor-driven belt or chain system with guide tracks that provide structured movement paths, reducing operational complexity compared to free-moving designs while still achieving the safety benefit of external maintenance access.
3Ease of operation
If the top frame is moved outside the work space for maintenance, then accessibility for operators is improved, but the positioning precision and control complexity increase
Solution Approach 1:
The hoist device acts as an intermediary that simplifies positioning control by providing predefined movement paths through guide tracks. These tracks constrain the top frame's movement to specific trajectories between working and maintenance positions, reducing the complexity of positioning control while ensuring accurate and safe transitions.
Solution Approach 2:
The manual positioning and control of the top frame is replaced by an automated hoist device with motor-driven belt or chain mechanisms. This mechanical substitution eliminates the need for operators to manually position the top frame, reducing control complexity while improving maintenance accessibility.
Data Source
AI summary
An apparatus for packaging an object with a tubular film, includes: a main frame, a stretch frame for stretching the tubular film and for applying the tubular film to the object, and a top frame having a feeding device for delivering a tubular film from a film magazine to the stretch frame and having a cutting device to cut the tubular film to a predetermined length. The top frame is moveable at the main frame between a working position and a maintenance position. In the maintenance position the top frame is located outside the work space.