Design Of Wearable Sit-Stand Stool For Prolonged Standing Jobs

Zakaria, Mohd Ridzman Ikhza (2020) Design Of Wearable Sit-Stand Stool For Prolonged Standing Jobs. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, people that working in the manufacturing field are prone to have lower back pain due to working in standing posture for prolonged time. Working in a standing position for many hours is so much tiring and it will directly affect worker's health and work productivity. In order to solve this problem, this project has been conducted to design a Wearable Sit-Stand Stool (W3S) for prolonged standing jobs. W3S allows the users to walk together with the sitting support while wearing it, without obstructing the workspace, at the same time avoiding strenuous postures such as bending. The main objectives of this project are to determine the design requirement of W3S, analyze technical specifications of W3S and to fabricate a medium-fidelity prototype of W3S. In order to achieve these objectives, several methods have been conducted. Questionnaire survey and Quality Function Deployment (QFD) has been developed to determine the design requirement from the customer. Next, four conceptual design was produced based on the design requirement and all the design were going through Pugh concept screening and concept scoring. The material for W3S was chosen based on the method of material selection, which consist of design requirement, concept screening and concept scoring. Next, Design for Assembly has been conducted to reduce assembly time and assembly cost which leads to lower cost of product. Furthermore, a lot of analysis such as static analysis and stress analysis were conducted to W3S to determine the best condition ofW3S to the user. After conducting all of the analysis, medium-fidelity prototype has been fabricated and the prototype has additional features like adjustable length, adjustable angle inclination and adjustable seating position. In tem1 of sustainability, material used for the prototype can be recycled and it also used lower amount of material and component compare to other concepts of design. Therefore, the impact of fabrication W3S towards environment are low

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