#231 Safety Design - 3: Built-in Safety Devices
Building a safety device into mechanical equipment increases the intrinsic safety of the equipment. It is best to incorporate the intrinsic safety feature during the designing stage of equipment when you install a safety device inside the equipment.
(1) Built-in design of safety devices
-1Types of safety devices
The following types of safety devices are available:
1)Movable barrier safety device
2)Two-hand control safety device
3)Photoelectric safety device
4)Sweep safety device
5)Pull-out safety device
-2Built-in design of safety devices
Case example of movable barrier safety device:
The mechanical equipment with this safety feature implemented will not run if any part of the body is placed within the guard zone. If you install a built-in interlocking control as part of the equipment during the initial design stage, it can prevent disasters resulting from deliberate alteration such as removal of the guard.
(2) Safety measures for non-intrinsically safe device
You may need to implement additional safety measures for purchased equipment or when it is difficult to install a built-in safety device into the equipment during the initial design stage. The best way for such cases would be to implement safety measures in a step-by-step manner as shown in the below figure.
- Positioning technology
- Designing and processing
- Sensor Technology
- Automation elements technology
- Clean room technology
- Design hints
- Design tips
- Designing and Machining
- Drive mechanism design
- Hints on designing
- Linear Motion Components
- Locating Technology
- Manufacturing technology
- Motion mechanism design
- Pneumatic Drives
- Production Technology
- Technology Outlook
- General description
- Low-cost automation and materials
- Transfer LCA
- #333 Know-how on automation: Pressurized heating technology - 5: Multilayer pressurized heating process technique
- #332 Know-how on automation: Pressurized heating technology - 4: Points to remember when designing mechanism of pneumatic pressurization method
- #331 Know-how on automation: Pressurized heating technology - 3: Pneumatic pressurization method and pressure profile
- #330 Know-how on automation: Pressurized heating technology - 2: Pressurization method and pressure profile
- #329 Know-how on automation: Pressurized heating technology