JOURNAL of the JAPANESE SOCIETY of AGRICULTURAL MACHINERY
Online ISSN : 1884-6025
Print ISSN : 0285-2543
ISSN-L : 0285-2543
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Volume 47, Issue 3
Displaying 1-20 of 20 articles from this issue
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  • An Agricultural Machinery Manufactur's Opinion
    Masao MIKAYAMA
    1985 Volume 47 Issue 3 Pages 271-272
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.271
    JOURNAL FREE ACCESS
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  • Analysis of Ignitability of Diesel Engines under Low Temperatures Condition Using Sunflower Oil as a Renewable Fuel (Part 2)
    Ignition Lag of Injected Fuel Particles
    Ken Araya, Tomiho Yoshida
    1985 Volume 47 Issue 3 Pages 273-277
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.273
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    When the sunflower oil was used as diesel engine fuel, the ignitability at low temperatures was much poorer than diesel oil. In order to find the cause, the behavior of the sunflower oil spray injected in the combustion chamber has analyzed in Part 1. In this paper, a combustion phenomenon of the fuel particles injected in the combustion chamber was theoretically analysed to investigate the engine startability.
    The sunflower oil showed a ignition lag which is about 5.8 times longer than No. 2 diesel oil. Consequently if they were injected in the same combustion chamber under the same conditions, sunflower oil was more difficult to be ignited than No. 2 diesel oil. The chemical ignition lag was 1.2 times longer with sunflower oil than with No. 2 diesel oil, because of the difference of an activated energy. The physical ignition lag of sunflower oil was about 25 times longer than that of No. 2 diesel oil because of the larger size of the injected particle.
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  • Research on the Pelletization of Biomass (Part I)
    Experiment on Pelletization Using a Roller Desk Type Pelleting Machine
    Haruo ESAKI, Takaaki SATAKE, Kangquan GUO, Mikio YASHIRO
    1985 Volume 47 Issue 3 Pages 279-284
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.279
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    The objective of this study is to analyse the mechanism of formation of biomass resources such as rice husk, rice straw, peanut shell, bark of wood, and stem of Sugi and Hinoki trees using the roller desk type pelleting machine.
    The effect of the water content of the material, inner diameter of holes formed on the desk die and the presence of binding materials, etc. on the process of pelletization was studied experimentally.
    Quantitative determinations of the major mechanical properties of the pellets such as apparent density, compression strength, bending strength and shearing resistance and coefficient of crushing to pieces were also performed.
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  • The Fundamental Study of Hill Side Tractor (1)
    The effect of the warming-up process and the friction characteristic of the rubber tyre under the sloped condition
    Takemi MACHIDA
    1985 Volume 47 Issue 3 Pages 285-292
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.285
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    Regarding the fundamental study of the Hill Side Tractor, the side slip test of model tyre on the steep slope condition was done by using the side slip testing apparatus, but sometimes the reproducible data could not be obtained under the same test conditions. This result was based upon the diffrent conditions of the tyre and the non perfect tyre warming-up process.
    Therefore, the main object of this study was to establish the method of pre-warming-up process of tyre, and to clarify the effect of the pre-warming-up process by using the SEM (scanning electon microscope) and an instrument for the measurement of surface roughness by the stylus method.
    This paper describes also on the relationship between tyre leaning angle and tyre characteristic. coefficient of friction, the distribution of contact pressure, and the contact imprints by tyre pressure analizer.
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  • The Study on the Vibratory Soil Cutting of Vibrating Subsoiler (Part 3)
    Characteristics of Power Requirement
    Kenshi SAKAI, Hideo TERAO
    1985 Volume 47 Issue 3 Pages 293-300
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.293
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    In the previous papers, the studies were focused on draft force reduction on a vibrating subsoiler. The purpose of this paper is to describe the characteristics of power requirements on a vibrating subsoiler and to investigate the effects of the cutting directional angle β, amplitude a, frequency f and velocity ratio λ on soil cutting horsepower ratio Ps and total horsepower ratio Pt.
    Soil cutting horsepower ratio Ps can be defined as a change of energy to brake the soil on vibratory tillage against non-vibratory tillage. Total horsepower ratio Pt shows a change of energy to operate the tested subsoiler on vibratory tillage against non-vibratory tillage.
    Soil cutting horsepower ratio Ps and total horsepower ratio Pt were not affected seriously by the cutting directional angle β and increased as velocity ratio λ decreased. At the same velocity ratio λ, the greater the amplitude or the smaller the frequency, the smaller both Pt and Ps became.
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  • Study on Specific Gravity Separation by Pneumatic Pulse
    Jinzo NAGAHIRO
    1985 Volume 47 Issue 3 Pages 301-310
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.301
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    In order to determine the standard design parameters required for the basic design of a specific gravity separator of down-flow type, which stratifies and separates bulk materials, the husked rice mixture in particular, into vertical layers according to specific gravity from bottom to top, basic researches on the separation of bulk materials differing in specific gravity were carried out. And, it became clear that (1) the optimum specifications of a perforated sheet metal screen with round opening which is mounted at the bottom of separating chamber are hole diameter d=∅1.5mm, hole pitch p=3.0mm and opening area ratio S0=9.4%, (2) the optimum frequency of sinusoidal pneumatic pulse vibration is fa=5Hz and (3) the specifications of a inclined porous separating screen can be determined easily by adopting the down-flow layer thickness of husked rice mixture h=20-40mm and the separating period required ts, req=40-100s for separating efficiency ηs=100%
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  • Development of the Measuring Device for Six-Components of Rotary Tillage Resistance and Analysis of Torque Waves
    Koichi HASHIGUCHI, Jun SAKAI, Shoichiro YAMANAKA, Koichi IWASAKI
    1985 Volume 47 Issue 3 Pages 311-319
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.311
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    In order to clarify the tillage resistance on the rotary blades, a new device for the measurement of six-components of force and moment acting on individual blades was developed, which is composed of triple cylinders and attached to the center-drive type transmission of tractors. By use of this device, a series of tillage tests for Japanese type rotary blade “nata-zume” was carried out changing the arrangement of blades. Representative examples of the measured waves of six-copmpnents of tillage resistance are illustrated. Further, the functional equation for the description of tillage resistance on a nata-zume is proposed introducing new fundamental parameters related to the shear length of soil. In accordance with this equation, three kinds of configuration value in the triangle wave which is the simplest approximation of the actual wave of tillage torque are formulated as linear double regression equations of those fundamental parameters.
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  • The Rotational Vibration of Tractors (Part 1)
    Basic Characteristics of Rotational Vibration
    Kazuhiko OHMIYA
    1985 Volume 47 Issue 3 Pages 321-327
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.321
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    To evaluate the characteristics of the rotational vibration of tractor (pitch, roll, yaw), a gravel road was selected and the angular accelerations of 3 tractors were measured and analyzed. The angular acceleration was calculated from accelerations measured by 9 accelerometers. Consequently, the pitch and yaw rotational vibrations were affected by the irregularities of terrain and the roll rotational vibration was affected not only by the irregularities of terrain, but also by lugs of rear wheels. And it seems that the magnitude of the yaw rotational vibration was negligibly small.
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  • Composting of beet sugar manufactory waste and its sterilizing effect (Part 1)
    The test result in the Summer
    Juzo Matsuda, Mitsuro Hyakumachi, Tadayoshi Takeda, Jun-ichi Himoto, Y ...
    1985 Volume 47 Issue 3 Pages 329-335
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.329
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    This investigation was carried out to evaluate a feasibility of composting and a sterilizing effect by the Beltsville aerated-pile method on beet sugar manufactory wastes.
    The tested materials from manufactory were composed from the residual soil which was separated from raw beet piles (piler soil), the dehydrated surplus sewage sludge and the concentrated steffen filtrate (C. S. F.), and the wheat straw was added as bulking agent and sources of carbon.
    The composting period during aeration was 23 days and the curing period was 43 days. The central temperature of this compost pile reached over 60°C within 3 to 7 days and the highest temperature was 81.9°C. Organic matter was decomposed sufficiently during composting and curing periods, and also the pasteurizing effect by heat generated in composting on waste soil was very satisfactory.
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  • The Effect of Pre-treatment on the Press Characteristics of Grass (II)
    Naoki Sakai, Hiroyuki Nakagawasai, Mikio Kamo, Wataru Sunohara
    1985 Volume 47 Issue 3 Pages 337-342
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.337
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    A factorial experiment on the pre-treatments by using the two legumes and the two press machines was carried out. It was shown that the advantages of the piling pre-treatment from some points such as a rate of press, a consumed electric energy and an amount of total nitrogen in juice fraction. Although it was possible to obtain more total nitrogen in the processed juice by piling compared with the other methods from a material balance, this was caused by the high value of rate of press and by the increment of non-protein nitrogen during piling. EAA (Essential amino acid) index of the processed juice by piling seemed to be equivalent to the EAA of soybean, the piling for an useful method was proposed in order to obtain the leaf protein effectively.
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  • Studies on Evaluation Method for Clod Size Distribution of Soil Layer after Tillage (Part 1)
    Approximation by Rayleigh's Distributoin to Clod Size Distribution
    Naotaka HAYASHI, Shoji MORIIZUMI, Tomoo YUMIYA, Hajime KARAHASHI, Kuni ...
    1985 Volume 47 Issue 3 Pages 343-348
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.343
    JOURNAL FREE ACCESS
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    In order to judge the result of tillage, we bust establish the test methods for evaluating the change of soil conditions. We unst numerize the state of soil clods or the state of turning over soil layer. But many problems are stacked on clod size analysis.
    There are no standard methods, such as sampler sizes, system of openings of sieves and so on. No valuable method how to express the sieved clod size is generally found.
    In this report, the following properties were clarified. The clod size distribution can be well approximated with Rayleigh's distribution and by using the two parameters of Rayleigh's distribution, the followings can be obtained easily; the mean clod diameter in weight, its standard deviation and so on. By this method, the parameters were obtained regardless of the series of openings of sieves. So this method can be recommended for valuable clod size analysis.
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  • An Evaluation of Semi-mechanization of Transplanting and Harvesting Operations in Tobacco Production from the standpoint of Sciece of Labour
    Yasuhiko MIYAKE
    1985 Volume 47 Issue 3 Pages 349-354
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.349
    JOURNAL FREE ACCESS
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  • Impact Response Properties of Watermelons in growth Process
    Chenge of Impact Response
    Akira SASAO
    1985 Volume 47 Issue 3 Pages 355-358
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.355
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  • The cone penetrometer for puddlfd paddy soil
    Yoshiki NAKAMURA, Haruhiko MURASE
    1985 Volume 47 Issue 3 Pages 359-362
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.359
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  • Improvement of Soil Fertility by Agricultural Machinery
    Yoshio SHINMURA
    1985 Volume 47 Issue 3 Pages 363-366
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.363
    JOURNAL FREE ACCESS
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  • Electrostatic Characteristics of Tea Leaves and Stems
    Senkichiro HAYAKAWA, Eiichiro SAKAGUCHI, Ritsuya YAMASHITA
    1985 Volume 47 Issue 3 Pages 367-373
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.367
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  • Hay Drying Facilities with the Utilization of Solar Heat
    Katsuzirou KOJIMA, Masao TSUKAMOTO, Hirosi MAEKAWA
    1985 Volume 47 Issue 3 Pages 375-380
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.375
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  • On Brack Soybean Drying With De-fumidifier and Vinyl-house
    Yosisige MATSUO
    1985 Volume 47 Issue 3 Pages 381-384
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.381
    JOURNAL FREE ACCESS
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  • On the New Technique for Transplanting of Welsh Onion by Rice Transplanter
    Mitunori HOSONO, Hiraku MAEDA, Yukinori YOKOYAMA
    1985 Volume 47 Issue 3 Pages 385-388
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.385
    JOURNAL FREE ACCESS
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  • Linear Electromagnetic Actuator and its Application to Agricultural Machine
    Considering intelligent agricultusal machines and energy for agriculture in future
    Yosio KANO, Shinya HASEBE, Shu FUNADA, Hajime YAMADA
    1985 Volume 47 Issue 3 Pages 389-395
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.47.389
    JOURNAL FREE ACCESS
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