Jacquard Machine Hook Selection Guiding Body Locking Element
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Solution Overview
Problem
High-speed operation and heat within Jacquard machines lead to deformation of guiding body legs, causing selection problems as hooks are not accurately guided, resulting in unreliable hook selection by solenoids.
Innovation Solution
The introduction of a locking element on the selection body that restricts the horizontal movement of guiding body legs, preventing deformation and ensuring accurate hook guidance by engaging the legs' free ends with positioning lips and protuberances, thereby maintaining the intermediate distance between guiding body legs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed operation is implemented in the Jacquard machine, then productivity increases, but the guiding body legs deform due to heat and stress, causing selection problems
Solution Approach 1:
The patent changes the physical parameters of the guiding body by adding a locking element that restricts the intermediate distance between legs, preventing thermal and stress-induced deformation during high-speed operation, thus maintaining selection reliability while enabling high productivity
Solution Approach 2:
The locking element is installed beforehand to prevent deformation before it occurs during high-speed operation. This proactive measure compensates for the thermal expansion and stress effects that would otherwise cause selection problems during rapid weaving cycles
2Reliability
If the guiding body legs are made more rigid to prevent deformation, then selection reliability improves, but the device complexity increases
Solution Approach 1:
The guiding body is segmented into legs and a locking element, allowing the legs to remain relatively simple while the added locking component provides the necessary rigidity control. This modular approach improves reliability without significantly complicating the overall structure
Solution Approach 2:
The locking element acts as an intermediary component that mediates between the simple leg structure and the requirement for high rigidity. It provides the necessary structural reinforcement while maintaining ease of assembly and disassembly
3Ease of manufacture
If the intermediate distance between guiding body legs is increased to accommodate PCB mounting, then ease of manufacture improves, but structural stability deteriorates
Solution Approach 1:
The locking element is designed to be installed during the assembly process, preliminarily securing the intermediate distance between legs before the PCB is mounted. This ensures both ease of manufacture and structural stability are achieved
Data Source
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AI summary
This invention relates to an assembly consisting of a selection body (2) and at least one guiding body for a shed forming device for a weaving machine, the selection body comprising one or more positioning lips (11) in order to position the selection body (2) between guiding bodies placed next to one another, each guiding body comprising two legs (1) which have a free end between which a printed circuit board (PCB) can be mounted as a support of one or more selection bodies (2). This invention also relates to a hook selection device for a shed forming device for a weaving machine, more specifically a Jacquard machine provided with a selection body (2) of this type.