| Project/Area Number |
04556017
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
林学
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| Research Institution | Iwate University |
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Principal Investigator |
SHISHIUCHI Masao Iwate Univ., Fac.of Agric., Prof., 農学部, 教授 (10003782)
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| Co-Investigator(Kenkyū-buntansha) |
OIKAWA Ryoichirou Forestry Techniques Research Institute in TOYOMA, Director, 所長
TATSUKAWA Shirou Iwate Univ., Fac.of Agric., Lecture, 農学部, 講師 (70142891)
SAKAI Hideo Univ.of Tokyo, Fac.of Agric., Associ.Prof., 農学部, 助教授 (70126069)
GOTOU Junichi Kochi Univ., Fac.of Agric., Associ.Prof., 農学部, 助教授 (90127928)
村山 茂明 林業工学研究所, 研究員
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| Project Period (FY) |
1992 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 1994: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1993: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1992: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | radio control / appendant apparatus for generating soil hrust / gradability / stability / ability to get over obstacles / 障害物回避 / ソイル スラスト / 土圧 / ロータリー刃 / 最適回転数 / 切断トルク / 懸架構造 / 刈払機 / 試作 / リモートコントロール / 下刈り作業 / 地拵え作業 / ハイブリッド形車両 |
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| Research Abstract |
Backgroud In Japan, planting areas are usually covered with weeds, because of abundant precipitation and fertile forest-land. Weeding operations in several years after planting are needed for making productive forests. Now, weeds in planting areas are usually slashed by hand brush-cutters. A development of productive and low cost weeding machine is desired, because labor intensity is very high in weeding operations by hand brush-cutters especially on Japanese forest conditions of steep slope.
Concept in design Mechanical structure : 1.Self-propelled base machine with flexible gum-tracks. 2.Rotary cutter which can get over obstacles. 3.Radio-controlled operations from the ground. Performance : 1.Gradablity ; 50 degree. 2.Getable over obstacles ; 40 cm. 3.Ground pressure of tracks ; less than 0.5kg/cm^2.4.Maximum cutting width ; 1.8 m.
New mechanism Two new mechanisms were took in the machine, a piece of appendant apparatus to increase gradability and stability and rotary cutters which can get over obstacles. The appendant apparatus can generate more soil thrusts which assist gradability of a base machine by using shear strength of soil, and can prevent weight-transfer in steep slope. The suspension of rotary cutter is a link structure which can rift the cutter by using reaction of shock to obstacles.
Outlines of the machine 1.Total weight ; about 1 t. 2.Length*Width*Height ; 3.5m*1.4m*1.0m. 3.Engine power ; 30 PS.
Performance of the machine 1.Cutting speed ; 1m/s. 2.Gradability ; 45 degree. 3.Maximum obstacle height which the machine can get over ; 40cm.
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