Abstract of Special Research Report (SRR-No.13)
National Institute of Occupational Safety and Health, Japan
Development of Devices and Working Systems for Promoting Safety of Aged Workers (First Report)
|Shigeo UMEZAKI and Kiyoshi FUKAYA|
: As the aged society is coming true in Japan, the expansion of the field of work and the promoting safety for aged workers has become a matter of great concern. Therefore, the specific research of the "Development of Micro-Electronics for Promoting the Working Life of Aged Workers" was conducted from 1986 to 1989. That research aimed mainly at promoting safety of aged workers in regular or usual operations.
Falling Accidents and Evaluation of Potential Risk of Fatal Falls of Elderly People
: As the population of the elderly in Japan is gradually increasing year by year, and at the same time the birth rate is declining, Japanese employees are tending to work until a more advanced age. Accidental falls are causing a large number of deaths and disabilities, and importantly the elderly are more liable to lose their balance, and to suffer fatal injuries by falls than the younger.
Effects of Noise in Work-Place on Performance of Elderly Workers
: Since the knowledge of the effect of noise on task performance is limited and is generally inconclusive, the effect of noise on the performance of data processing task was investigated. In this experiment, three aged subjects and four controlled subjects were used, and the comparison was made between the aged group and the controlled group. During the experimental procedure, these subjects were exposed to six kinds of noises which were impulsive noise with high frequency, steady-state noise with high frequency, impulsive noise with low frequency, steady-state noise with low frequency, fractal noise and resonance noise. These experiments with the six environments were compared with an environment of non-noise condition. Each subject performed the experimental task for 30 minutes under the noise intensity of 85dB(A). The procedure of experimental task was as follows;
An Experimental Study on Risk Perception of Aged People
: This study was aimed to clarify some characteristics of aged people regarding their ability of risk perception. In this experiment, the risk perceptions for respective 32 aged (56-77 years old) and younger ( 18-26 years old) subjects in each group were evaluated by using twenty videotaped scenes which consist of four situations; daily work, working in a factory, driving and cycling.
Evaluation of Danger Perception Ability by Tactile Sense of the Aged
: In this report "danger perception" implies "danger avoidance", because the concept of "danger" implies the concept of "prediction" and "avoidance"
Improvement of Operation Devices Suitable for Aged Workers
|Kiyoshi FUKAYA, Hiroyasu IKEDA, Shigeo UMEZAKI and Shoken SHIMIZU|
: The most important requirement for an operation of aged workers was the realization of safety of work near the dangerous movable parts of machinery. In the present situation, when many aged workers are engaged in such work, they are forced to use complicated or highly computerized operation devices, and they feel difficulty and anxiety for this operation. Therefore improvement of operation devices which is suitable for aged workers should be required.
Safety Evaluation of Prevention System for Crushing in Warehouse
|Shigeo UMEZAKI and Shoken SHIMIZU|
: The operation in warehouses which many aged workers are engaged in can be characterized by the fact that they are forced to work near many dangerous moving machines such as stacker crane, automatic guided vehicle and motor-drived door of cold warehouse. For this reason, some rules of stopping machines when they operate or approach machines are usually established in industries, but actually there are many other operations without stopping machines, so that many serious accidents have sometimes occurred during the execution of these dangerous operations.
Summary and Subject of Future Studies
: The aim of this research was promoting safety of aged workers engaged in irregular or unusual operations. For that purpose, various characteristics of the agd were studied, and several safety measures were proposed. The results of these studies are summarized as follows.