Support Effect and Simulation Evaluation of Lifting Motion Using Non-Wearing Type Power Assist Device

Author:

Yokota Masashi1,Takaiwa Masahiro2

Affiliation:

1. Faculty of Information Science and Engineering, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama, Okayama 700-0005, Japan

2. Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima, Tokushima 770-8506, Japan

Abstract

One of the serious problems that Japan has been facing is its growing aging society, which causes a shortage of young workers in the nursing field to support care recipients and in other industries that require heavy labor. Many workers in these workplaces experience back pain. To reduce the burden on the lower back, the squat method is generally recommended when workers lift heavy objects. Many assist devices have been developed to reduce the burden on the body; however, most wearing type devices have difficulty performing the squat method owing to their mechanical constraints. In a previous study, we developed a non-wearing type pneumatic power assist device that considers the squat method and evaluated its support effects during a simple lifting motion. In this study, we developed a passive type assist device and a previously developed active type device and quantitatively evaluated their effectiveness in lifting motions. In addition, we analyzed muscle activity using a musculoskeletal simulator.

Funder

Awa Bank Foundation for Academic and Cultural Promotion

Publisher

Fuji Technology Press Ltd.

Subject

Electrical and Electronic Engineering,General Computer Science

Reference23 articles.

1. Ministry of Internal Affairs and Communications, Japan, “White Paper: Information and Communications in Japan,” 2016 (in Japanese).

2. Ministry of Health, Labour and Welfare, “Occupational Disease Occurrence Survey Report,” 2018 (in Japanese).

3. Ministry of Health, Labour and Welfare, “Low Back Pain Prevention Guidelines in the Workplace,” 2013 (in Japanese).

4. K. Naminohira and M. Fujimura, “Electromyographic and Kinematical Study of Human Lifting Motion —Effect of Mass of Heavy Object on Motion Methods—,” Japanese J. of Occupational Medicine and Traumatology, Vol.58, No.5, pp. 234-239, 2010 (in Japanese).

5. K. Naminohira, M. Fujimura, and K. Shinkoda, “Electromyographic and Kinematic Study of Lifting Motion in Male Adults —Effects of Mass of the Object on Motion Patterns (The Second Report)—,” Japanese J. of Occupational Medicine and Traumatology, Vol.59, No.5, pp. 245-250, 2011 (in Japanese).

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