İSTANBUL TECNICAL UNIVERSITY DEPARTMENT of MECHANICAL ENGINEERING TECHNICAL DRAWING COMPUTER AIDED RAPIDOS TECHNICAL DESIGN PROJEGT ASSOC. PROF. DR. Cevat Erdem İMRAK RESEARCH ASSISTANTS Recep DEMİRSÖZ MEMBERS ASENA KÖK 030020071 GONCA ERTEKİN 030030068 SELAHATTİN DOĞRAMACI
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TECHNICAL DRAWING COMPUTER AIDED
TECHNICAL DESIGN PROJEGT
ASSOC. PROF. DR. Cevat Erdem İMRAK
RESEARCH ASSISTANTS Recep DEMİRSÖZ
We visited the library and studied problem number ten on page 96 of the book “Engineering design Graphics” for the computer aided technical drawing course design homework
We exchanged our ideas and knowledges on the homework and we discussed what we can do about it. We examine the research done on this topic.We split the work in the parts and decided what everyone is going to be working on.
* Graphics about chair and desk height
* Dimensions of our design
* Some formulas about chair
* Sitting Position
For centuries the folding chairs have not changed
seat pan height = poplitedheight – 2.5cm + cushion height + height of heel
Where 2.5cm is introduced, based on the assumption that the seat pan height should be slightly lower than popliteal height to prevent impacting the thighs.
seat pan height = work surface height – sashaku + cushion height + height of shoe heel
When the work surface height is fixed , te seat pan height can be determined by subtracting sashaku from the work surface height
VDT sashaku = sitting eye height – height to display screen centre – l–sinb
Where l is the viewing distance and b is the viewing angle
the two submodel are connected by VDT sashaku from the relationship between the VDT screen centre height and sitting eye height. When the opperator faces the display screen, the centre of the display screen should correspond to the natural viewing angle of the operator. VDT sashaku in this case represents :
Reading/writing position Use front half of the seat Both feet on the floor Desktop sloping
Move backwards on the seat
Use the lumbar support
Feet on footrest