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Volume 58, Issue 3
Displaying 1-19 of 19 articles from this issue
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S. SHIMADA1996 Volume 58 Issue 3 Pages 1-2
Published: 1996
Released on J-STAGE: April 30, 2010
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Kouzo KAWASAKI, Hideaki IMURA, Masahiro AIURA, Shigeru ITOH1996 Volume 58 Issue 3 Pages 3-10
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSRush-bundles are usually packed vertically in a dryer and are dried by hot air after immersing in mud water. At the later period of the drying process, water vaporization rate decreases significantly and the thermal efficiency becomes much lower. If we feed back the hot exhaust gas into the supplied hot air during the later period, the thermal efficiency is expected to be improved. In order to estimate the improvement of the thermal efficiency by this controlled feedback method, we simulated the process of rush drying with theoretical calculation and compared the controlled feedback drying with non-feedback one. As a result, we obtained the following conclusion; Total thermal energy consumption for rush-drying decreases more than 10% by employing controlled feedback system.View full abstractDownload PDF (984K) -
Physical Properties and Inorganic Chemical Components of Brown SugarTakayoshi AKINAGA, Akihiro NOSE, Hiroshi OKADOME, Yoshihiro KOHDA1996 Volume 58 Issue 3 Pages 11-17
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSOkinawan brown sugar were produced at 7 factories in Okinawa prefecture. Quality of sugar cane stalks as the raw materials directly influence on the quality of brown sugar and the quality is unstable. It is necessary to investigate the properties of brown sugar for the improvement of its quality and manufacturing technology. Taste, inorganic chemical components and physical properties of brown sugar produced in all of manufactories in Okinawa prefecture were investigated and the reciprocal relation among them were analized. As the result of investigation, it became clear that the P, N, and Ca significantly affected the quality of brown sugar.View full abstractDownload PDF (821K) -
Michihisa IIDA, Katsuya FURUBE, Kiyoshi NAMIKAWA, Mikio UMEDA1996 Volume 58 Issue 3 Pages 19-26
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA watermelon harvesting gripper for agricultural robot has been developed. To determine the specification of the gripper, the dimensions and mechanical characteristics of watermelon were investigated. The gripper has self-locking mechanism by friction force between finger and watermelon. Then, actuator to grasp a watermelon is not required. In this study the permissible position error and the contact stress between the finger of the gripper and a watermelon were measured indoors. As these results, it is confirmed that the gripper can harvest watermelon without damage at position error less than 40mm.View full abstractDownload PDF (2381K) -
Transmission of Ultraviolet Rays through FabricsNobuaki KUWABARA, Tsuguo OKAMOTO1996 Volume 58 Issue 3 Pages 27-35
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn this study, the reduction of UV exposure for farmer in agricultural work, is aimed. For the purpose, UV transmission was measured for various fibers dyed in different colors. The results obtained are as follows. 1) The UV transmission through fabrics greatly depended on type of fibers. The UV transmission for polyester was low and that for cotton which is often used as farm's working clothes in summer was high. 2) Dyeing of fabrics reduced their UV transmisson. Thus, selection of fibers and coloring were found to be very effective to reduce the UV exposure. 3) It was found that the UV transmittance for fabrics follows the Kubelka's theory, hence the absorption efficiency (α) and the scattering efficiency (S) can be determined for various fabrics. By these results the characteristic of UV transmission for various fabrics were understood. 4) The range of α and S to hold UV exposure of less than 1 MED (Minimal Erythema Dose), were determined. The results were very helpful not only for the poduction of farm working clothes, but also for the choice in wearing proper clothes depending on weather condition.View full abstractDownload PDF (999K) -
Mohammad Ali BASUNIA, Takemi ABE, Yoshio HIKIDA1996 Volume 58 Issue 3 Pages 37-47
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA two dimensional, heat conduction problem in cylindrical coordinate system, expressed by partial differential equation, was solved using the finite difference method for predicting the temperature distribution in cylindrical rough rice storage bins. The program can handle any square size element. The model can simulate the temperatures in filled grain bins of any regular shape and at any location, if the initial grain temperature at the start of simulation and the hourly ambient air temperature for the location are available. Other input data required for the model include two dimensional grid data of square size element, and the thermal properies of the grain, air and the thermal and physical properties of the bin wall material. The model has been programmed in BASIC, compatible with microcomputers, thus requiring less time for computer simulation of temperatures. Tempeature predicted by the model were in very good agreement with the measured temperatures in two 0.8m diameter bins of wooden and metalic containing rough rice, respectively.View full abstractDownload PDF (1125K) -
Distribution of Wear on TineGang ZHENG, Yoshinobu OTA, Tatsuo HIROMA, Takashi KATAOKA1996 Volume 58 Issue 3 Pages 49-58
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to develop a high speed tiller for minimum tilling operation, knowledge of wear mechanism, among others, is a basic requirement. In one of the models of the high speed tiller, the wear mechanism of a cultivating tine is investigated to improve its wear resistance. In this paper wear characteristics is discussed. Wear improvement techniques is discussed in part 2 of this study. In this study, the amount of wear and condition of surface wear on the commonly used cultivator tine, together with tines coated with fine ceramics that would give a good wear resistance were investigated. The experiments were performed both in the laboratory and on the field at various runs. The results show that the maximum wear of the tine tip occurs at the center as well as at the extreme edges of the tip. The amount of surface wear is proportional to the depth of penetration of the tine. The surface which is coated with fine ceramics is observed to show minimum wear.View full abstractDownload PDF (1281K) -
Test for Practical UseKen KOBAYASHI, Akihiko ONODA, Masato SUZUKI, Haruki OTSUKI1996 Volume 58 Issue 3 Pages 59-68
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSBased on the techniques developed through the function check model and the experimental model, the demonstration model in which scion and stock were fed manually and clips were fed automatically by the parts feeder was developed. The demonstration model was brought to the horticulture experimental stations in Saitama and Iwate Prefectures, and the practicability was confirmed through 8 grafting tests with over 7, 500 seedlings. From these tests results, it was judged that the demonstration model had practicability. The results of this research were transferred to an agricultural machinery manufacturing company, and the market in October 1993.View full abstractDownload PDF (7963K) -
Basic Study on the Development of Seeding SystemYasuhiko SAWADA, Seiichi ITO, Ikuma ENDO, Hideyuki HANAI, Kazuo HORIBE1996 Volume 58 Issue 3 Pages 69-76
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDirect seeding is one of the advantageous methods to save labor on rice culture. On this method of cultivating, it is important to raise germination rate for getting high yield. Then the effect of several factors on the penetration depth of dropped seeds was examined, and a new rice seeder for submerged paddy field was manufactured in order to prove the practicality application of pneumatic direct seeding system.View full abstractDownload PDF (2358K) -
Fundamental Studies and Trial Manufacture of CombineTomohiko ICHIKAWA, Takao SUGIYAMA1996 Volume 58 Issue 3 Pages 77-86
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSStudies were conducted to develop a combine for multi-crops, which equipps with screw type threshing and separating mechanisms, and is adaptable not only for paddy but also for upland crops such as wheat, barley, soybean, buckwheat, etc. As the results of transferring this technology to manufacturers concerned, combines for multi-crops were put into practical use and are widely used in paddy and upland farming fields. The whole process of these studies will be mentioned by the series of 4 reports. In this paper, fundamental studies on threshing and separating mechanisms and on a introducing drum attached to the threshing cylinder are discussed. The structure and function of prototype combine made as trial are also reported.View full abstractDownload PDF (1364K) -
Performance Test of Prototype MachineKazutomo ICHITO, Mitsuru HACHIYA, Tatsushi TOGASHI, Yasuhiro SASAKI1996 Volume 58 Issue 3 Pages 87-94
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSResearch on shredder for chopping roll bales to process mixed feed was carried out. A prototype of shredder with new cutting mechanism, in which roll bales are cut squarely with two kinds of cutters aranged in right angle, were developed. Degree of chopping, ease of handling and power requirements of the prototype were investigated, useing silage, straw and hay roll bales, the first bales being our main target. The low power requirements and the precision of chopping attained our target, but the portion which can not be cut (remainder of disposition) occurs as the cutting mechanism premise that the objects maintain column shape. The disposition quantity per hour was lower than our target, and is necessary to further improve the performance.View full abstractDownload PDF (1026K) -
Atsushi SUMI, Ken ARAYA1996 Volume 58 Issue 3 Pages 95-102
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper deals with the prevention of air pollution by collecting dust which is exhausted from the dryers of co-operative grain facilities. An air filter which consists of cotton and artificial fiber was tested. This filter is disposable but the dust collection efficiency is high and the cost is resonable because the rated filtration velocity is high such as 0.4m/s. The dust collection efficiency and the life span of the filter were tested. The results showed that the dust collection efficiency was 98% for more than 50μm dust particles, 86 to 89% for 20 to 30μm dust particles, and 86% for less than 10μm dust particles. Under the exhaust air with 16mg/m3 dust density, the pressure of the filter rose extremly after twenty days and cleaning by air jet was required.View full abstractDownload PDF (5462K) -
Koichro OKAZAKI, Masahiro MIYAZAKI, Yuji NAGASAKI, Nobuhiro ITOKAWA1996 Volume 58 Issue 3 Pages 103-109
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to develop an automatic operation system in steep sloped citrus orchards, an overhead monorail was set on the top of citrus trees with wire-trellis. The monorail carieer was possible to move automatically by installing radio and sensor control devices. Automatic pesticide spraying units which stride over a tree, a sensor which detects the degree of luxuriance with luminous diode, and automatic loading units with movable bucket conveyers were developped.View full abstractDownload PDF (887K) -
Measurement of Operating Items at Cold Starting ConditionKazuo SATO, Masamitsu NAKANO, Takehiro MATSUMOTO, Masami TAKANO1996 Volume 58 Issue 3 Pages 111-114
Published: 1996
Released on J-STAGE: April 30, 2010
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Outline and Working SystemsTakashi GOTOH, Sumihiko MIYAHARA1996 Volume 58 Issue 3 Pages 115-118
Published: 1996
Released on J-STAGE: April 30, 2010
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Tohru AKACHI1996 Volume 58 Issue 3 Pages 119-124
Published: 1996
Released on J-STAGE: April 30, 2010
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K. TAKAHARA, S. HAYASHI1996 Volume 58 Issue 3 Pages 125-126
Published: 1996
Released on J-STAGE: April 30, 2010
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M. DOMON1996 Volume 58 Issue 3 Pages 127-128
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (257K) -
I. ISHII1996 Volume 58 Issue 3 Pages 129-130
Published: 1996
Released on J-STAGE: April 30, 2010
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