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 46, Issue 4
Displaying 1-18 of 18 articles from this issue
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  • Three Topics on Apple Cultivation
    Taichi TAKEDA
    1985 Volume 46 Issue 4 Pages 441-442
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_441
    JOURNAL FREE ACCESS
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  • Studies on the Movable Type Crop-bed System in Greenhouse (4)
    Practical Application Test and Economical Evaluation for The System
    Isamu KURATA
    1985 Volume 46 Issue 4 Pages 443-450
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_443
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    For the purpose of labor-saving and the improvement of the working environment in greenhouse, a new type of movable crop-bed system, including the working machinery and the partial cooling apparatus was developed and practically used. The practical application test and the economical evaluation for this system were done. As for the result of the cultivation test using this system, the yield of tomatoes of forced growing for winter production was about 3.7kg per one plant, which are neary equal to the yield for usual growing. The total working hour required for that cultivation was about 374h/10a, which is only about 1/3 of the labor for usual forced growing of tomatoes. When the labor-expense is increased higher than 1100yen/h, it seems to be profitable to use this movable type crop-bed system.
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  • Studies on the Development of a Screw Type Soybean Thresher (IV)
    Trial Manufacture of Screw Type Soybean Threshers and its Performance
    Tomohiko ICHIKAWA, Takao SUGIYAMA, Masao MANAKA
    1985 Volume 46 Issue 4 Pages 451-457
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_451
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    Trial make threshers equipped with the screw type threshing and separating mechanisms which were reported previously from part I to part III were built. These threshers were Model ST90 and Model ST100 in 1980, Model ST101 in 1981, the standard capacity type and Model ST102 in 1981, the high capacity type. In this report, the structure and functional characteristics of Model ST101 were discussed as a typical example of trial make threshers. At the same time, as a result of experimental comparison of Model ST101 with 3 conventional soybean threshers with the tangential threshing mechanism, Model ST101 was found to have a high performance.
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  • Studies on Rotary Blade in Up Cut Tilling for Deep Tillage (II)
    Model Test (1) Backward Throwing of Soil Clods
    Sakae SHIBUSAWA, Noboru KAWAMURA
    1985 Volume 46 Issue 4 Pages 459-464
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_459
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    The model tests of trial manufactured blades with various scoop surfaces to cut soil block were conducted to estimate the characteristics of backward throwing of soil clods. The clods thrown backward passed over the rotor shaft in up cut tilling, but they felt down on the tilling bottom in down cut tilling. The blade with flat scoop surface cut and threw the soil only at the tip and did not give it so high initial velocity. To make longer the throwing of clods in up cut tilling, ρ should be smaller, φ should be larger and/or φ1 should be larger, where ρ, φ and φ1 were the design parameters of circular arced cross section of scoop surface. High revolutional speed of the blade was also favolable for the improvement of backward throwing. The experimental results described above agreed with the simulations by throwing model shown in former paper.
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  • Studies on a small trencher (II)
    The effects of the shape of blades on the cutting resistance
    Junichi KAMIDE, Masanori TSUCHIYA
    1985 Volume 46 Issue 4 Pages 465-470
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_465
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    In the previous paper, the authors investigated the characteristics of power performance of a small trencher with a ladder chain type cutting device.
    In this paper, some commercial cutting blades were discussed in their shape and dimensions, and then, the nine blades were tested in the soil bin in order to clarify the effects of the shape of blades on the soil cutting resistance. The nine tested blades had different tip angle and tip foreward projection length from commercial blades.
    It was found that the soil cutting resistance was decreased as the tip anglewas decreased and tip foreward projection length was increaseed.
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  • Studies on a Track Type Tea Field Working Machine (I)
    Body and Tea Plucker for a Track Type Working Machine
    Yashuho MATSUYAMA, Tetsuya MATSUKUBO, Katsuro OKAMURA, Yoshimi MATSUMO ...
    1985 Volume 46 Issue 4 Pages 471-478
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_471
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    Practical application of machines for harvest, pest control, fertilization and inter tillage is almost completed in the studies, done since 1961, on a riding type tea field wheel type working machine. But 30-45 times traveling a year in row spacing under these operations, ground contact pressure is a problem to be discussed. As the optimum plucking time is short, plucking is necessary even under wet weather condition. Against these problems the resolution is changing from wheel type to track type which is superior in lightweigt and low ground contact pressure. A track type tea pluckig machine is better than any other tea plucking machines in good uniformity of plucked tea bush surface, less loss in plucking tea leaf and large amount of plucked leaf. Plucked leaf are conveyed by wind pressure into a picking bag, so leaf is bruised. But if only bruised leaf is processed on the same day, there are no problems.
    The running area per hour was about 10a/h in average.
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  • Studies on the Practical Application of Solar Energy to Rice Drying. (Part 2)
    Rice Drying with a Simplified Air Collector
    Kazuo HORIBE, Kenji NAKAGAWA, Seiishi OHSHITA, Masatoshi MAEDA
    1985 Volume 46 Issue 4 Pages 479-487
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_479
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    To put a rice drying with solar energy to practical use, in this report, the mathematical model of the rice drying and the solar drying simulations have been discussed.
    Firstly, a solar drying model was developed and the validity of the model was verified by indoor experiments, then the model was applied to solar drying field tests with a simplified air collector and a vinylhouse.
    Secondly, a mathematical model of the solar rice drying with the collector was conducted by conjunction between this mathematical drier and the collector. Using this, use the solar drying simulation could be conducted under optional geography, weather, collector, and drying condition.
    Then, an suitble solar collection area can be estimated in accordance with a quantity of rice to be dried. The simulations under the general datas were condcted, an a practical prediction formula of the mean drying rate was proposed.
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  • Studies on Three-Point Linkage for Rotary Tilling Tractor (I)
    Characteristics of Behavior of Virtual Hitch Point
    Jun SAKAI, Takao IKEMI, Hiroshi KARASAWA
    1985 Volume 46 Issue 4 Pages 489-494
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_489
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    Small-sized Japanese tractors have been developed mainly for the use of rotary tillage. They have special three-point linkages, and differ from the standard linkage system. The basic behavior and the mechanical characteristics of the three-point linkage for rotary tillage are clarified in this study. The purpose is to obtain an instruction of the rational design of three-point linkage for a rotary tilling tractor.
    This report clarified the geometric characteristics and the basic behavior of the virtual hitch point depending on changing depth of tillage which is important to rotary tillage at the free link condition. Their actual tendency based on the specification data of small-sized Japanese tractors was explained. It will be clarified under the limited condition of the virtual hitch point for stable rotary tillage and the design instruction of rational three-point linkage in future reports.
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  • Utilization of Solar Energy for Dairy Farming (II)
    System Analysis by Simulation
    Hisaya YAMADA, Noboru KAWAMURA, Kiyoshi NAMIKAWA
    1985 Volume 46 Issue 4 Pages 495-500
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_495
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    In dairy farming, much hot water are demanded over a wide temperature range. So, a compound solar system consisting of high temperature and low temperature system to supply hot water was proposed in the previous report.
    This paper describes the results of digital simulation to clarify the effectiveness of the proposed system. The compound solar system could be more effective under some conditions than the single solar system consisted of one type collector and one storage tank. Also, calculations on the possibility of driving a refrigerator by solar energy were tried.
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  • Soil Failure by Introduing Fluid under Pressure (II)
    Differences of soil failure at different soil moisture contents
    Ken ARAYA
    1985 Volume 46 Issue 4 Pages 501-508
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_501
    JOURNAL FREE ACCESS
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    When pressurized air was supplied into a soil layer to break it down, the observed nature of soil failure was varied with the moisture content of the soil. This research was conducted for analyzing the differences of stress in soil induced by injecting air into the soil layer with variable moisture content by the finite element method.
    When the moisture content was below than the plastic limit, the soil was broken down by shearing stress produced by static pressure of the injected air.
    When the moisture content was increased (close to the liquid limit), and soil showed a high resistance to air permeability, soil was disrupted by tensile stress as if it was torn. This phenomenon was observed even if injected fluid was liquid.
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  • Development of Measuring Device of State of Cooked Cocoons by Cocoon Filaments' Peeling Tension
    Chiyuki TAKABAYASHI, Akira HOSOKAWA
    1985 Volume 46 Issue 4 Pages 511-519
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_511
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    In order to determine the state of finish of cooked cocoons in the silk reeling procss, the authors conducted research on a method to evaluate the state of cooked cocoons by a simulation detecting the points of high tension force occurring unexpectedly in the dispersion of cocoon filaments' peeling tension as pulses. On the basis of the simulatioion, a measuring device was developed, and a study was done on the relationship between the distribution of pulses and the state of cooked cocoons and reelability of cocoons. The authors confirmed that this measuring device could be usable as one of the methods for determining the state of cooked cocoons in the silk reeling process.
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  • Studies on deodorant apparatus of soil filter
    Isao FUKUMORI, Naoaki DOSHU
    1985 Volume 46 Issue 4 Pages 521-527
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_521
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  • Handle Starting of Engines for Agricultural and Indstrial Use
    Ken ARAYA
    1985 Volume 46 Issue 4 Pages 529-533
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_529
    JOURNAL FREE ACCESS
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  • Characteristics of Solar Heat Collecting Materials Sola Roll
    Kentaro MOHRI, Shigeo UMEDA, Shinichi NISHIMURA
    1985 Volume 46 Issue 4 Pages 534-537
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_534
    JOURNAL FREE ACCESS
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  • A Test of The Water Contamination of Lubricating Oil for Small Type Farm Engines
    Heizo MIYAZAKI
    1985 Volume 46 Issue 4 Pages 538-544
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_538
    JOURNAL FREE ACCESS
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  • Research for Farm Human Labor
    Ryuzo TAKEUCHI
    1985 Volume 46 Issue 4 Pages 545-552
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_545
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  • Studies on the Automatic Detecting Meter of the Grain Moisture for Drying Control in the Rough Rice-dryer
    Sadami YADA
    1985 Volume 46 Issue 4 Pages 553-557
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_553
    JOURNAL FREE ACCESS
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  • Noise in farm work-Measurement and evaluation
    Fumitake ISHIKAWA, Kyo KOBAYASHI
    1985 Volume 46 Issue 4 Pages 558-562
    Published: 1985
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.46.4_558
    JOURNAL FREE ACCESS
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