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 45, Issue 3
Displaying 1-21 of 21 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1983 Volume 45 Issue 3 Pages 282
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.282
    JOURNAL FREE ACCESS
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  • Cooling and Durability of Air-cooled Wankel Rotary Engine for General Use (2)
    Problems on Durability as well as Measures
    Jinzo NAGAHIRO
    1983 Volume 45 Issue 3 Pages 283-288
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.283
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    The purpose of this study is to clarify problems on cooling and durability which occured during the study on them of the small air-cooled Wankel rotary engine as well as measures. Between the two, the investigation on experimental results of (1) an axial flow air-cooling system of housings, and of (2) a charge cooling system both to lubricate the needle roller bearing, etc. in an induction mixture passage and to cool the rotor with the mixture were discussed in the first report.
    Subsquently, various kinds of an endurance test were performed with two prototype engines made by applying standard design parameters and materials, such as materials of housings and gas seals, anti-wear treatment for the silding wall surface of gas seals, gas seal clearances, the necessary quantitity of cooling air, optimum lublicating oil, etc.
    The present report deals with (1) the investigation on the results of endurance tests and (2) problems which occured during tests as well as maesures.
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  • Studies on the Mint Oil and its Application to Spark Ignition Engine (Part 1)
    Properties of Mint Oils and Some Engine Performance
    Hideo TERAO, Hiroyuki NISHIMURA, Katsuhiro MATSUI
    1983 Volume 45 Issue 3 Pages 289-296
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.289
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    It was found that the physical and chemical properties of refined peppermint and spearmint oil, produced in cold regions such as Hokkaido-northern part of Japan, were very simular to those of refined eucaliptus oil. Its applications to spark ignition engine as fuel has been conducted. In this paper the engine was operated on the peppermint and spearmint oil blended fuels with regular grade gasoline of lead free. The results are as follows: 1) Excess air ratio can be shifted towards lean mixture part unless the carburetor setting is for neat gasoline use. As a result, brake horsepower and brake thermal efficiency were slighty increased in case of using the mint oil blended fuels compared to neat gasoline. 2) When the engine was operated under the same excess air ratio, the brake horsepower and brake thermal efficiency showed little difference between neat peppermint oil and neat regular gasoline.
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  • Study on Vibration and Noise Reduction of Tractor Cab (Part 1)
    One State of Vibration and Noise of Tractor Cab
    Akira OIDA, Takashi TANAKA, Hiroyuki TAKAHASHI
    1983 Volume 45 Issue 3 Pages 297-302
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.297
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    In some tractor cabs an operator is in an uncomfortable condition because of high noise level, even if the cabs aim at the comfortable work for the operator. In order to reduce the noise in the cab we investigated closely the state of vibration of a commercial cab and noise in the cab in various test conditions. Resonance phenomena were also clarified experimentally. It was found from the results that a solid borne sound, which was occured from vibrations of cab walls caused by transmitted vibrations of engine through tractor body, was very high at frequencies under 100Hz. To cut or reduce the transmitted vibrations from engine to cab was suggested to improve the inner coditions of tractor cab.
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  • Desigh of the Vehicle Equipped with a Winch and its Travelling Performance on Slope (I)
    Design of the Vehicle and Fundamental Performances
    Tsuguhiko FURUKAWA, Ken KAWASAKI
    1983 Volume 45 Issue 3 Pages 303-310
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.303
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    A vehicle equipped with a winch, in which the winding speed of a wire rope was synchronized automatically with the peripheral speed of driving wheels, was developed and its fundamental performances were investigated.
    Results obtained were as follows
    1) When the vehicle was used jointly with a winch, the winch and wheels were operated normally. It was possible to move smoothly uphill and downhill.
    2) The tractive force of the vehicle used jointly with a winch was larger than the wheel drive only, and increased with increasing the revolution-speed ratio between the winch and wheels.
    3) When the vehicle was used jointly with a winch, the variation of travelling speed was little in the range of lower slippage. The higher the revolution-speed ratio, the more outstanding was this tendency.
    4) The climbing ability of the vehicle used jointly with a winch was fairly higher than the wheel drive only. It is necessary in the determination of revolution-speed ratio to consider the wheel slippage and the load of winch.
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  • Studies on Cultivator Shanks
    Satoru NAMBU, Shun-ichi HATA, Toshio ENDO
    1983 Volume 45 Issue 3 Pages 311-318
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.311
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    It is well known that the spring-tine of cultivator is more effective than a rigid-tine under a hardpan or stony land condition. This test was conducted to determine the dynamic characteristics of spring-shanks for a field cultivator and a row crop cultivator. The relationship between the draft force and soil hardness was found by use of subsurface cone-penetrometer at a higher speed. Maximum draft force of tine and strength of three kinds of shanks were analysed
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  • Studies on the Coating of Vegetable Seeds (2)
    Elucidation of the Coating Mechanism
    Sadami YADA
    1983 Volume 45 Issue 3 Pages 319-326
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.319
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    The seed was coated in 3 layers with the inner coated layer (white powder) the middle layer (red powder) and the outer layer (white powder) by using powder of 2 colours for the purpose of investigating on the coating mechanism of the seeds by the fluidizing methods. Cutting section of a coated seed was classified into 4 shapes. The shape of cutting section of a coated seed was differed by circulating conditions of the seeds in the coating cylinder. At the best circulating conditions, the seed was located in the center, 3 coated layers were a circular shape with equall thickness, and particles of adhered powder to a fixed thickness were scarcely separated.
    In this experimental equipment, the seeds started circulating at the air velocity of less than that of Yagi's formula. Theoretical equations of the adhered quantities of coating powder on a seed setted up, and they approximated the experimental values.
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  • Studies on the Screening of Brown Rice by the Trommel Type Screen (II)
    On the Diameter of the Cylinder and the Agitating Rods
    Akira AKASE, Masanori TSUCHIYA
    1983 Volume 45 Issue 3 Pages 327-335
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.327
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    The authors investigated the effects of the diameter of the cylinder and the agitating rods in the cylinder on the screening accuracy and capacity of the trommel type separator for brown rice. The results indicated that both the screening accuracy and capacity were improved by increasing the number of the agitating rods in the case of using the large diameter cylinder and the size of the separating unis became smaller by use of many parallel small diameter cylinders when handling the material at a certain feed rate.
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  • Studies on Automatic Sorting of Agricultural Products (I)
    Surface Color Detecting of Agricultural Products
    Vinh Duc CHAU, Shigeo UMEDA, Kentaro MOHRI
    1983 Volume 45 Issue 3 Pages 337-341
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.337
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    The peel color, as well as the shape, is considerable factor in grading agricultural products that is mainly discriminated by people in fact. In this paper, automatic detecting for the peel colors of agricultural products were attemped by using an opto-electronic system consisting of four color sensors and a 4W fluorescence lamp. The color sensor was made by combining two different spectral sensitivity photo diodes and infrared cut off filter into one (Dual junction photo diode).
    In order to detect the peel colors, these color sensors were set to receive the reflective rays from the both sides of equatoral part and stem part, or apidal part (blossom end part) of a fruit. Hence, from the output voltages of these color sensors, colored degree Cm and colored uneveness Cv(1), Cv(2), Cv(3) were calculated to express the status of color.
    Tomatoes and satsuma oranges were tested and the following results were obtained:
    As the peel colors progressed from matured green to dart red (Hue θ=120°-20° (Hunter's chromaticity)) the values of Cm decreased in proportionally.
    The peel colors of satsuma oranges in SHU group (good group) were more even (values of Cv(1), Cv(2), Cv(3) were small) and progressive (values of Cm were small) than those in YU proup (fair group). It shows that the status of peel color seems to be discriminated by this method availably.
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  • Analysis of the Motion of Tea Leaves in a Primary Drying Tea Roller (I)
    Hitoshi YOSHITOMI
    1983 Volume 45 Issue 3 Pages 343-349
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.343
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    The motion of tea leaves in a primary drying tea roller which plays a role of main process of tea manufacturing is thought to give a great effect on the quality in drying of tea. In this paper, as the theoretical approarch on the leaf motion, the equation of the leaf motion by the stiring arm of a drimary drying tea roller was developed, and the trajectory of tea leaves was obtained by solving this equation. As a consequence, it was found that the design parameters such as the stiring arm length and the bent angle of stiring arm tip, the revolution of main shaft, and the friction coefficient of tea leaves were the factors of controlling the leaf motion. It became feasible to calculate the effect of these factors on the trajectory of tea leaves by this equation.
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  • Field Storage of Vegetables in Cold District (II)
    Artificial Inducement of Freezing Damage
    Taisei OKAMURA, Masashi HIROTA, Kazunori HIRONAKA, Ken'ichi ISHIBASHI
    1983 Volume 45 Issue 3 Pages 351-356
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.351
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    The freezing damage to the vegetables for four sorts being investigated under an artificial atmosphere in winter of Obihiro using drip as a criterion, multiple regression of drip on item (or initial moisture content), temperature (minimum) and time were calculated. Relationship between drip on temperature and time showed linearity from the orthogonal polynomials for Chinese cabbage and radishes, while quadratic curves on temperature were obtained for cabbage and carrots. The decreasing order of freezing damage is as follows: Chinese cabbage, radishes, cabbage and carrots, and this fact agreed much with the results reported in previous paper.
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  • Quantitative Measurement of the Texture and Cracks of Hulled Nonglutinous Rice Grains Using Image Data Processing System
    Tsugio MATSUHISA, Akira HOSOKAWA
    1983 Volume 45 Issue 3 Pages 357-367
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.357
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    A quantitative method of mechanical grading of the quality of nonglutinous hulled rice has been developed, using the image data processing system.
    The linear relationship was obtained between the attenuances of the images displayed on the color monitor and the readings of the scale of the multi-color data system. The regression was
    y=-0.08285x+2.31360
    where x is the reading of the scale, and y is the attenuance.
    A mean value of the attenuances of the image of a sample was
    Em=∑aj·sj10j=0/∑aj10j=0
    where aj is the distribution of attenuance expressed as the projected area of equal light intensity, and sj is the slice level of attenuance.
    Texture of rice samples was well determined by the mean attenuance, when they were illuminated by diffused, transmitted ray; 1st grade≤0.485<2nd grade ≤0.530<3rd grade ≤0.611
    Cracked grains were well detected under dark field illumination by oblique transmitted ray through the sample holder which was developed.
    The number of cracked grains was estimated by the following formula.
    y=-7.03757-0.60781a7+0.954693c6
    The content of whole grains or normal grains, a major factor for quality evaluation could be estimated from the distribution of attenuances.
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  • Banana Ripening Experiments on an Enlarged Scale
    Applicability of Experimental Results to Commercial Banana Ripening Practice
    Yasuhisa SEO, Akira HOSOKAWA
    1983 Volume 45 Issue 3 Pages 369-374
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.369
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    Banana ripening experiments with about 240kg (twenty cartons) of banana were conducted to examine an applicability of results obtained in experiments on rather small scale using about 12kg of banana to commercial banana ripening practice. These enlarged experiments were about 1/25 to 1/10 of the scale of commercial practice in quantity of banana.
    The applicability was confirmed by the results that in the enlarged experiments, the prediction of sugar content of banana pulp during ripenig was also made in good accuracy with the ripening temperature schedule and this proved realization of the automation of banana ripening on commercial scale.
    Finally, the fundamental procedure far the auotmation was illustrated by the flow chart.
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  • Erratum to : Prediction of Sugar Content with Temperature Schedule in Artificial Banana Ripening
    1983 Volume 45 Issue 3 Pages 374
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.3_374
    JOURNAL FREE ACCESS
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  • Performance of Up-Cut Rotary Tiller with Rake-Type Filtering Screen
    Kunio MORIMOTO, Kyoshiro MIURA, Shigeru YAGI, Motomu KARAHASHI
    1983 Volume 45 Issue 3 Pages 375-378
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.375
    JOURNAL FREE ACCESS
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  • Insect Control of Cereal Stored in Metallic Vapor Coating Bag
    Kiyokazu GOTO, Ritsuya YAMASHITA
    1983 Volume 45 Issue 3 Pages 379-382
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.379
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  • Safety Cabs/Frames and Their Testing (1)
    Tractor Overturing Accidents and Safety Cabs/Frames
    Yoshiaki MORI, Osamu YUKUMOTO, Akira HIRATA, Masamitsu TAKAHASHI
    1983 Volume 45 Issue 3 Pages 383-387
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.383
    JOURNAL FREE ACCESS
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  • Critical State Soil Mechanics and Soil-machine System
    Takashi TANAKA
    1983 Volume 45 Issue 3 Pages 388-393
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.388
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1983 Volume 45 Issue 3 Pages 394-398
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.394
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1983 Volume 45 Issue 3 Pages 399-403
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.399
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1983 Volume 45 Issue 3 Pages 404-405
    Published: 1983
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.45.404
    JOURNAL FREE ACCESS
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