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DESIGN AND SELECTION OF HINGE JOINT CONCEPT FOR CASUALTY EVACUATION BACKPACK STRETCHER USING IPD TOOLS LIKE QFD

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Author(s): PREM CHAND GUPTA | SURESH GARG | SACHIN MAHESHWARI

Journal: International Journal of Engineering Science and Technology
ISSN 0975-5462

Volume: 4;
Issue: 1;
Start page: 204;
Date: 2012;
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Keywords: Casualty Evacuation Backpack Stretcher | Hinge Joint | QFD (Quality Functions Deployment)

ABSTRACT
Casualty Evacuation (Casevac) Stretcher plays an important role in the casualty evacuation chain. The designs of existing stretcher are single or double fold and heavy therefore difficult to carry. For the present war scenario, a strong need to design the multifold backpack Casualty Evacuation Stretcher is felt since it will be easy to carry use and store. To make the stretcher backpack, hinge joint is the most suitable method to meet the functional requirements. Various engineering considerations are required to design the hinge joint for the stretcher. The functional requirements of the hinge joint are worked out from the market survey conducted for stretcher.For the present work, an attempt is made to design the stretcher hinge joint by using Integrated Product Design Approach and tools like QFD (Quality Functions Deployment) and CAD. (Computer Aided Design). The application of CAD is dovetailed to QFD to generate and visualize the shape, size, weight and assembly of the hinge joint with stretcher, in addition to the stress analysis. To evaluate and select the right design, QFD tool is applied since it is a convenient technique to deal with the various objectives like voice of customer (what’s), voice of engineers (how’s) and technical difficulties to achieve the target values.
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