Cloth spreading device
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Solution Overview
Problem
Conventional cloth spreading devices experience unstable operation due to external factors like air compressor conditions and varying cloth weights, leading to operational failures and increased costs, particularly requiring position sensors for precise control.
Innovation Solution
The use of actuators permitting speed control and position control for the up and down moving device, allowing simultaneous operation of introduction and extension chucks, and adjustable speed control for efficient cloth transfer and processing, eliminating the need for position sensors and enhancing safety and environmental sustainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an air cylinder is used as the up and down moving device, then the device structure is simple, but the operation becomes unstable due to external factors and varying loads
Solution Approach 1:
The patent changes the operating parameters of the air cylinder by introducing an adjustable speed control mechanism. The air cylinder's operating speed can be modified according to the weight of different clothes (sheets, quilt covers, etc.), allowing stable operation despite varying loads. This parameter adjustment resolves the contradiction between simple structure and stable operation.
2Measurement precision
If position control is implemented for the introduction chucks, then the positioning precision is improved, but facility cost increases due to position sensors
Solution Approach 1:
The patent implements self-service positioning where the introduction chucks automatically return to their initial position using the air cylinder's inherent rebound characteristic. When the air cylinder extends, the introduction chucks move upward and naturally rebound to the initial position without requiring position sensors or complex control systems. This achieves positioning functionality while avoiding additional facility costs.
3Productivity
If the introduction chucks move up continuously without intermediate stopping, then the processing speed is improved, but operation safety deteriorates due to potential collisions
Solution Approach 1:
The patent implements periodic action through speed control of the air cylinder. The introduction chucks move upward at controlled speeds with periodic adjustments - faster movement during safe zones and slower movement near potential collision points. This periodic speed adjustment maintains processing efficiency while preventing harmful collisions with the extension chucks or other components.
Data Source
Figure 1
Figure 2
Figure 3(I)~3(II)
AI summary
To provide a cloth spreading device capable of operating stably. The cloth spreading device includes: introduction chucks 21, 21 in a pair that grip corner portions of a cloth C; an up and down moving device 23 that moves the introduction chucks 21, 21 in a pair up and down; extension chucks 31, 31 in a pair that receive the cloth C from the introduction chucks 21,21 in a pair and grip corner portions of the cloth C; and a transversely moving device 34 that moves the extension chucks 31, 31 in a pair transversely. The up and down moving device 23 is driven by an actuator permitting speed control and position control. Thus, an external factor does not cause large change in the operation of the up and down moving device 23 to achieve stable upward and downward moving operations of the introduction chucks 21, 21. The introduction chucks 21, 21 can be moved and stopped at will. This eliminates the need for a position sensor to achieve reduction in facility cost.