Balance Windshield Door with Adjustable Stopper and Pressure Control
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Solution Overview
Problem
Existing windshields for balances require complex mechanisms to maintain a desired door opening degree, making it troublesome to automatically half-open and close the door.
Innovation Solution
A windshield with a door that uses a sensor to monitor movement, a stopper to block the door's movement path, and a control unit to stop the driving mechanism when the door is half-opened or fully opened, allowing for easy switching between half-open and full-open positions by adjusting the stopper's position, and incorporating a pressure sensor to control air cylinder operation for safety and automatic stopping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mechanism is provided to automatically open and close the door at a desired opening degree (as in Patent Literature 1), then the door can be automatically half-opened to minimize air flow, but the system becomes complex because a desired door opening degree needs to be kept in memory
Solution Approach 1:
The stopper serves itself by being disposed on the movement path to automatically determine the door's half-opened position. The system uses the physical presence of the stopper rather than requiring external memory or complex programming to remember the desired opening degree.
Solution Approach 2:
The patent replaces the memory-based control system with a mechanical stopper system. Instead of using electronic memory to store and recall the desired opening degree, the invention uses a physical stopper that mechanically defines the half-opened position, simplifying the control mechanism.
2Object-affected harmful factors
If the door is automatically opened and closed at a half-opened position, then air flow around the weighing pan is minimized, but the system requires complex mechanisms to maintain the desired opening degree
Solution Approach 1:
The invention extracts the essential function of defining the door position from the complex memory-based control system and implements it through a simple mechanical stopper. This removes the unnecessary complexity while preserving the air flow minimization benefit.
Solution Approach 2:
The stopper automatically defines the door's half-opened position without requiring external control systems. The mechanical stopper self-services by physically blocking the door at the correct position, eliminating the need for complex memory and control mechanisms.
3Device complexity
If a stopper is disposed on the movement path to determine door position, then the system becomes simpler and easier to operate, but additional mechanisms may be required to enable/disable the stopper
Solution Approach 1:
The stopper is made dynamically adjustable, allowing it to be disposed on or removed from the movement path as needed. This enables the system to switch between half-opened and fully opened modes without requiring complex additional mechanisms, as the stopper's position itself provides the adaptability.
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
Enables simple and safe automatic half-opening and closing of the door, improving operational ease and safety by using a stopper to determine the door's position and a pressure sensor to prevent over-opening or pinching, without the need for additional mechanisms.
Implementation Method 1
the sensor is a pressure sensor configured to monitor a pressure of air to be supplied to the air cylinder, and the control unit is configured to stop the supply of air to the air cylinder when the pressure of air monitored by the pressure sensor exceeds a predetermined value
Data Source
AI summary
A windshield for a balance which has a door that can be automatically opened and closed or half opened and half closed is provided. The windshield includes doors to which air cylinders are joined as driving means, sensors for monitoring movements of the doors, pressure sensors configured to monitor a pressure of air to be supplied to the air cylinders of the driving means, and a control unit configured to stop an air supply to the air cylinders when a pressure of air monitored by the pressure sensor exceeds a predetermined value. Stoppers are disposed on movement paths of the doors to block movement, and when air pressure inside the air cylinder increases to the predetermined value due to contact with the stopper, the door stops. The door can be freely fully opened and half-opened according to the position of the stopper.