Rotatable Door Safety Device for Treatment Machines
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Solution Overview
Problem
Conventional motorized rotatable doors in treatment machines lack safety systems to prevent accidental closure when obstacles are present, posing risks to operators and potential damage to the door and objects, and do not ensure adequate sealing pressure on the treatment chamber.
Innovation Solution
A closing group with an automatic safety device that includes a mobile arm with a rotation pin and an elastic element, which interacts with the drive mechanism to interrupt or reverse the door's closing rotation if an obstacle is detected, ensuring safe operation and maintaining sealing pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a powerful motor is used to guarantee effective closing and adequate gasket pressure, then sealing reliability is improved, but the risk of harmful effects increases when an obstacle is present
Solution Approach 1:
The safety device performs preliminary detection of obstacles before the door completes its closing action. The mobile arm with rotation pin detects interference during the closing rotation, and if an obstacle is detected, the command element is actuated to interrupt or reverse the closing motion before the door fully closes, preventing damage to objects or injury to operators while still allowing the powerful motor to be used for effective sealing when no obstacle is present
Solution Approach 2:
The safety device implements a feedback mechanism where the mobile arm continuously monitors the door closing motion. When an obstacle is detected, the command element receives feedback signal and automatically interrupts or reverses the motor-driven closing action. This feedback loop allows the system to maintain powerful motor operation for reliable sealing while automatically preventing harmful effects when obstacles are present
2Object-affected harmful factors
If safety systems are added to detect obstacles during door closing, then safety is improved, but device complexity increases
Solution Approach 1:
The safety device uses a simple mechanical intermediary system consisting of a mobile arm with a rotation pin that interacts with the command element. This mechanical intermediary detects obstacles during door closing and transmits the detection signal to the command element, which then interrupts or reverses the motor operation. The solution avoids complex electronic sensors or control systems by using a straightforward mechanical detection and actuation mechanism
Solution Approach 2:
The mobile arm with rotation pin serves multiple functions: it acts as both the detection mechanism for obstacles and the actuation mechanism for the command element. The same mechanical component that detects the presence of an obstacle during door closing also directly actuates the command element to interrupt or reverse the motor, eliminating the need for separate detection and actuation systems
3Stress or pressure
If the door closing force is increased to ensure proper sealing, then sealing pressure is improved, but the risk of overload damage increases
Solution Approach 1:
The safety device performs preliminary detection during the door closing rotation before the full closing force is applied. If an obstacle is detected during the closing motion, the command element interrupts or reverses the motor operation before the door completes closure, preventing overload conditions that could damage the door structure or gasket while still allowing high closing force to be applied when no obstacle is present
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The safety device effectively stops the door from closing if an obstacle is present, preventing accidents and ensuring consistent sealing pressure on the treatment chamber, enhancing safety and operational reliability in machines like washing, thermal disinfection, and sterilization units.
Implementation Method 1
the safety device comprises at least an elastic element configured to act in contrast with the removable attachment element and configured to allow the interaction of the safety device with the command element
Data Source
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AI summary
Closing group for a treatment machine, comprising a rotatable door (13), opening and closing drive means (14, 15) and at least a command element (37 to start and stop the drive means (14, 15); the closing group also comprises a safety device (27) connected to the rotatable door (13) by means of at least a removable attachment element (33), the safety device (27) is able to cooperate with the command element (37) of the drive means (14, 15) and is configured to automatically separate the attachment element (33) from the rotatable door (13) at least if there is an interference or obstacle (M) appears during the closing rotation (Rl) of the rotatable door (13) and to vary the condition of the command element (37) so as to control the drive means (14, 15) and effect at least the interruption or the inversion of the closing rotation (Rl) of the rotatable door (13); the safety device (27) comprises at least a mobile arm (29) on which the attachment element (33) is made, and is provided with a rotation pin (31) to pass from the connection position with the rotatable door (13) to the interaction position with the command element (37) and vice versa.