Wrapping Module Retractable Arms for Belt Replacement
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Solution Overview
Problem
The existing bundling installations for packaging products in plastic film face challenges in efficiently and safely changing the conveyor belt at the topping station, requiring high tension and precise synchronization, which leads to wear and tear and complicates maintenance, necessitating multiple operators and extensive time.
Innovation Solution
A redesigned topping station with a U-shaped cradle and retractable arms allows for easier access and replacement of the conveyor belt, featuring a sole with a fixed central plate and complementary plates, and quick-release mechanisms for the motorized roller, enabling belt tension adjustment and reduction in the conveyor table's longitudinal size by 10-25%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the conveyor belt is subjected to high tensions to achieve precise synchronization, then the synchronization precision is improved, but the belt wear increases and reliability deteriorates
Solution Approach 1:
The patent applies dynamics by making the support arms for the guide rollers movable and retractable rather than fixed. This allows the belt tension to be adjusted dynamically - during operation the arms are extended to provide necessary tension for synchronization, but during maintenance they can be retracted to reduce tension and facilitate easy belt replacement without damage
Solution Approach 2:
The patent changes the parameter of belt tension by allowing the support arms to be positioned at different distances from the table center. This enables optimization of tension levels - high tension during operation for precision, and low tension during maintenance for safety and ease of replacement
2Measurement precision
If the conveyor belt is subjected to high tensions to achieve precise synchronization, then the synchronization precision is improved, but the belt wear increases leading to more frequent replacements
Solution Approach 1:
The movable and retractable support arms allow dynamic adjustment of belt tension. During operation, the arms are extended to provide high tension for precise synchronization. During maintenance, the arms are retracted to reduce tension, enabling safe and easy belt replacement without waiting for catastrophic failure
Solution Approach 2:
The patent enables preliminary maintenance action by allowing the belt to be replaced before it fails. The retractable arms make belt replacement simple and quick, so operators can proactively replace belts during scheduled maintenance rather than waiting for breakage, thereby extending the effective service life and avoiding unplanned downtime
3Stability of the object's composition
If the topping table is designed with fixed support structures for the conveyor belt, then the structural stability is improved, but the ease of belt replacement deteriorates
Solution Approach 1:
The patent transforms fixed support structures into dynamic, movable support arms that can be retracted. During normal operation, the arms are extended to provide stable support for the belt. During maintenance, the arms are retracted to create easy access for belt replacement, eliminating the need for complex disassembly operations
Solution Approach 2:
The support structure is segmented into movable arms that can be independently retracted. This segmentation allows the belt access area to be opened up without affecting the overall structural stability of the topping table, enabling easy maintenance while preserving operational stability
4Ease of operation
If the conveyor table is designed with extended support arms for belt guidance, then the operational functionality is improved, but the longitudinal size increases
Solution Approach 1:
The support arms are designed to be retractable rather than permanently extended. During operation, they extend to provide necessary belt guidance and tension. During storage or when not in use, they can be retracted to minimize the longitudinal footprint of the table, optimizing space utilization
Solution Approach 2:
The retractable arms can be positioned inside or alongside the main table structure when not in use, similar to nested dolls. This allows the functional elements to be stored compactly within the overall table envelope, reducing the effective longitudinal size when belt guidance is not actively required
Data Source
Figure 1~4
Figure 2~3
Figure 5
AI summary
The module comprises, combined in a U-shaped cradle (5), a wrapping table (11) and a cycler (12), the bars (13) of which are mounted on endless chains (14) in order to revolve all around said table (11). The structure (21) of the table consists of side members (23) which are extended by extensions (22) in the form of retractable arms (32), the ends of which carry rollers (33) for guiding the belt (25) and said structure (21) is secured, by way of appropriate, easily removable means, to at least one of the side walls of the cradle (5) which is in the form of a frame (8) perforated by a window (28). The window (28) has a dimension in the longitudinal direction which is less than the overall length of said table (11), but this dimension is greater than the length of said table (11) following retraction of its end arms (32) so that the belt (25) can be removed and a new belt can be fitted.