Abstract of Special Research Report (SRR-82-1)
National Institute of Occupational Safety and Health, Japan
Special Research of Integrated Preventive Countermeasures for Overturnning Accidents Transportation Machinery
Introduction
SRR-82-1-1 |
Teizo HAKAMAZUKA |
: Woodworking equipment creates more accidents than every other machinery does. Especially, the accidents caused by the powered circular saw and hand-feed jointer account for 80 percents of all woodworking equipment accidents.
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Systematical Analysis of Countermeasures against Hazards Involved in Operation of Woodworking Machinery by using MORT
SRR-82-1-2 |
Yoshinobu SATO, Kiyoshi FUKAYA and Yoshiyuki EGAWA |
: In Japan, occupational accidents caused by the use of woodworking machinery has not decreased in the last several years, and the number of injuries by the accidents, for example, in 1980 accounted for 6.3 percent of all injuries resulting in more than four-days off from work in all sectors of industry. Thus, the prevention of such accidents at woodworking factories is given a more priority than other areas.
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Study of the Functional Safety Measures for Multiuse Woodworking Equipments
SRR-82-1-3 |
Noboru SUGIMOTO, Yoshinobu SATO and Kiyoshi FUKAYA |
: Also to woodworking operation, as to any industrial operation, the new technology of production has been introduced : the automation, robotalization, flexible automation system, which eliminate the necessity of the workers' operation. |
Study on Prevention to Blade Injuries by Sawing Machine
SRR-82-1-4 |
Kiyoshi FUKAYA and Noboru SUGIMOTO |
: According to the analysis of accidents caused by the use of woodworking machinery, approximately half of the total accidents occurred by circular saw bench and so on. And 79 % of accidents were blade injuries. Thus countermeasures against blade injuries involved in operation of circular saw bench were studied. There were three approaches ; measurement of human characteristic of response to the kickback, measurement of object of workers' attention during circular saw work, and evaluation of safety guards in the view point of ease of work. |
New Models of Wood-Shavings Collectors for the Molding Machine with High Speed Single Spindle
SRR-82-1-5 |
Kinichi KINOSHITA |
: Effective collector of wood-shavings or dusts has not yet been developed for the molding machines with high speed single-spindles. An obstacle is that works to chamfer and plane the curved surfaces of boards are formed with the machine. This paper describes two models of collecting wood shavings and dusts by purging jet-air and suction air.
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Dust Explosion avd Fire Hazards in a Wood-Dust collecting System
SRR-82-1-6 |
Toei MATSUDA and Michio NAITO |
: In many woodworking shops, dust collecting systems have been installed for the purposes of environmental aspects, use of wood dusts as a fuel in the furnace and so on. The hazards of wood-dust explosions and fires in the systems, however, have not always been appreciated, partly due to the recognition of the wood dust as by-products or wastes among wood workers. If flow velocities in the duct are kept as high as practical, then the time of exposure of dust particles to an ignition source is minimal, and the possibility of ignition is minimal. On the other hand, the hazard of flame propagation and acceleration in the coal mine galleries under initial static conditions have been reported in many publications, but the effect of air currents on the dust explosibility is not well clear in the ventilating duct system. Wood-dust explosion propensity in pipeline was then examined in relation to the installation of protective measures in the collecting, or pneumatic transport systems. |
Oxidative Self-Heating Behaviors of Fifteen Different Species of Wood Powder
SRR-82-1-7 |
Takashi KOTOYORI and Michio NAITO |
: There exist many research reports on various aspects of pyrolysis and combustion phenomena of wood or woody materials. However, researches on oxidative self-heating behaviours of those materials under strict adiabatic condition are very few. For that matter works by Akita et al.2), by Robertson et al.3) and lately by Anthony et al.4) are quite precious.
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An Investigation of Minimum Ignition Energies for the Layers of Some Wood Dusts
SRR-82-1-8 |
Toei MATSUDA and Michio NAITO |
: In wood process industries, values of minimum ignition energies are required for safety standards in relation to possible explosion hazards of wood dust clouds. A mass of data on the ignition energy are available for dust clouds, but the data for the ignition energies of dusts as deposits, heaps or their layers and the accuracy of the values are limited. |