Handheld Packaging Machine Inching Control for Strap Locking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Handheld packaging machines without lifting handles face issues with strap displacement or skewing during automatic strapping operations, leading to poor packaging quality due to the strap falling out when the machine is released from hand.
Innovation Solution
A control apparatus with a grip handle, inching switch, and a single-chip microcomputer controller that independently controls the steering engine motor, ensuring the strap is locked in a handheld state and providing emergency unlocking through an automatic reset switch, enhancing operational flexibility and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If full-automatic mode is used with a single button press, then the operation is simplified and automation is improved, but the strap locking reliability deteriorates because the strap is not secured during hand-held strapping
Solution Approach 1:
The system dynamically switches between two operational modes: semi-automatic mode for hand-held strapping operations where the operator maintains control of the strap locking process, and full-automatic mode for stationary operations. This dynamic mode switching allows the system to adapt to different operational contexts, ensuring strap locking reliability during hand-held operations while maintaining automation benefits during stationary operations.
Solution Approach 2:
The system incorporates feedback mechanisms through detection switches that monitor the operational state and provide real-time information to the control circuit. This feedback enables the control system to automatically adjust the operational mode based on detected conditions, ensuring that the strap locking process is properly controlled during hand-held operations while maintaining automation during stationary operations.
2Ease of operation
If the handheld packaging machine is released from hand during strapping, then the operator can reposition the machine, but the strap becomes unsecured and may fall out or displace
Solution Approach 1:
The system dynamically adjusts the strap locking state based on the operational phase. During the strapping phase when the machine is held by the operator, the system maintains the strap in a locked state. After strapping is complete and the machine is released for repositioning, the system automatically transitions to an unlocked state, allowing the machine to be moved without compromising packaging quality during the critical strapping operation.
Solution Approach 2:
The system performs preliminary locking of the strap before the operator releases the machine for repositioning. This preliminary action ensures that the strap is securely locked during the hand-held strapping operation, and only after this critical phase is complete does the system allow unlocking, thereby preventing strap displacement or falling out during machine repositioning.
3Ease of operation
If the inching switch is positioned for easy finger operation, then the ease of operation is improved, but the device complexity increases due to additional switch arrangements
Solution Approach 1:
The system merges the inching switch function with the existing control switch structure. The inching switch is integrated into the control circuitry as an additional input signal that works in conjunction with the full-automatic button, rather than as a completely separate control mechanism. This merging approach allows for easy finger operation while minimizing the increase in overall device complexity by reusing existing control circuit components.
Data Source
AI summary
Disclosed is a control apparatus for a handheld packaging machine. An inching switch is arranged on the front of a lower side of a grip handle, and the startup of a steering engine electric motor is independently controlled by the inching switch. A controller detects signals of the inching switch all the time; determines, once detecting signal corresponding to the inching switch being switched on, whether a travel detection switch is in place; controls, if the travel detection switch is not in place, the steering engine electric motor to operate in an unlocking direction; and controls, if the signal corresponding to the inching switch being switched on is not detected, the steering engine electric motor to operate in a corresponding locking direction. The apparatus performs independent control by means of an inching switch, and when still in a handheld state, can make as needed a handheld packaging machine with a strap loaded enter a locking state, such that the problem of strap falling can be solved, and the quality is ensured; and since the inching switch of the apparatus is arranged on the front of a lower side of a grip handle of the handheld packaging machine, the apparatus can be conveniently operated in the handheld state, such that the inching switch is operated in a timely manner and continuously pressed as needed, and thus the operation of the handheld packaging machine is more flexible.