Journal of the Society of Agricultural Structures, Japan
Online ISSN : 2186-0122
Print ISSN : 0388-8517
ISSN-L : 0388-8517
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Volume 9, Issue 1
Displaying 1-5 of 5 articles from this issue
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  • An Experiment on Explosibility of Some Sorts of Agricultural Dusts
    Shigeru YOSHIZAKI, Tomohiro TAKIGAWA
    1978 Volume 9 Issue 1 Pages 4-9
    Published: October 20, 1978
    Released on J-STAGE: September 05, 2011
    DOIhttps://doi.org/10.11449/sasj1971.9.4
    JOURNAL FREE ACCESS
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    In order to study the explosibility for agricultural dusts the authors made the explosion tests and measured the explosion pressures. The apparatus used was a so called Hartmann type explosion bomb. The agricultural dusts tested ranged from 200 mesh to 400 in size, 1.5% to 18 in moisture content (d. b.) and 71% to 99 in volatile matter content.
    The experimental results obtained were as follows:
    (1) All of the agricultural dusts tested showed rather strong explosibility.
    (2) Rice husk dust exploded with the whole range of moisture content tested.
    (3) Both maximum explosion pressure and maximum pressure rise increased with decrease of dust size. The above tendency was remarkable for the latter.
    (4) Maximum pressure rise decreased with increase of moisture content. On the other hand, moisture content did not influence on maximum explosion pressure.
    (5) The relation of volatile matter content to dust explosibility was not obviously observed, but the dust in higher volatile matter content showed a tendency to have higher explosive severity.
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  • Studies on the Location Planning for Agricultural Structures (II)
    On the Influences of Grain Dust Dispersion from Paddy Drying and Processing Facilities to the Surrounding Area
    Tomoyuki SENO
    1978 Volume 9 Issue 1 Pages 10-18
    Published: October 20, 1978
    Released on J-STAGE: September 05, 2011
    DOIhttps://doi.org/10.11449/sasj1971.9.10
    JOURNAL FREE ACCESS
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    The environmental problem of paddy drying and processing facilities (so-called “rice-center”; RC), especially, the influences of dispersion of grain dust to the surrounding area were investigated. The results obtained were summarized as follows;
    1) The concentrations of dust in RC were higher than the environmental quality standard for the protection of workers' health and safety.
    2) At outdoor of RC, the emitting dust from the dust control system were widely dispersed to surrounding area.
    3) From the questionaire to the neighbors of RC, it was proved that grain dust and machine noise from RC had occurred many troubles, and existence of RC itself resulted in excessive problem for most of the neighbors.
    4) It was provided that the area influenced with dust dispersion was correlated with the distance from RC and the angle composed of main wind direction and the line of RC to surrounding houses. This correlated line was named as limit line of dust influence, which depended on the types of dust collecting and processing system (shown in Fig. 5).
    5) The area influenced with noise was depended on only the distance from the facilities to houses, and the extent influenced over was estimated as far as about 300 meters.
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  • Work Studies of Rotary Milking Porlour
    Iwao NOTSUKI, Masaharu ODAI, Katsumi UENO, Noriaki YAMAGISHI, Toshio W ...
    1978 Volume 9 Issue 1 Pages 19-26
    Published: October 20, 1978
    Released on J-STAGE: September 05, 2011
    DOIhttps://doi.org/10.11449/sasj1971.9.19
    JOURNAL FREE ACCESS
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    Time and travel studies on milking routine were conducted in two farms (A and B) with 12-stall herringborne rotary milking parlour and a farm (C) with 8-stall tandem one. Heart rate and energy expenditure of milking operators were measured in another farm (D) with 12-stall herringbone type. Results were summarized as follows.
    1. The time for milking routine 103.6, 140.6 and 195.6sec./cow in A, B and C, respectively. The time for washing udder ranged 38.4-75.5sec./cow, and that for replacing and removing tlat cup was 41.0-64.4.
    2. The distance for milking routine was 27.0, 17.6 and 31.0m/cow in A, B and C, respectively.
    3. The numder of cows milked per man-hour was 34.7, 25.6 and 18.4 in A, B and C, respectively.
    4. The values of relative metabolic rate (R M R) measured in D were 2.42 for washing udder and 2.36 for putting cups on.
    5. It is suggested that the low efficiencies observed in this study were mainly ascribed to the inefficiencies of washing udder and putting cup on and off.
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  • On the Standards and Relations between Thermal E. M. F. and Temperatures of CC Thermocouples
    Shusaku KATAYAMA
    1978 Volume 9 Issue 1 Pages 27-31
    Published: October 20, 1978
    Released on J-STAGE: September 05, 2011
    DOIhttps://doi.org/10.11449/sasj1971.9.27
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  • Automatic Ventilation Control of Curing House for Domestic Tobacco Based on Dew-point Temperature
    Yuko OGURA, Asaji FURIUUCHI, Ryusaku WATANABE
    1978 Volume 9 Issue 1 Pages 32-37
    Published: October 20, 1978
    Released on J-STAGE: September 05, 2011
    DOIhttps://doi.org/10.11449/sasj1971.9.32
    JOURNAL FREE ACCESS
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