{"created":"2021-03-01T06:43:32.496851+00:00","id":25570,"links":{},"metadata":{"_buckets":{"deposit":"16c5360f-dd89-48b5-a089-108c2151b59b"},"_deposit":{"id":"25570","owners":[],"pid":{"revision_id":0,"type":"depid","value":"25570"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00025570","sets":["27:2466:2467:2587","9:504:2469:2588"]},"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Felling, Bucking, and Delimbing by a Harvester"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1987","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"37","bibliographicPageStart":"31","bibliographicVolumeNumber":"77","bibliographic_titles":[{"bibliographic_title":"東京大学農学部演習林報告"}]}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"マッケリハーベスタによるカラマツ間伐実験の結果，平均処理時間は67.8秒/本であった。枝払と同時に玉切・はい積できるので，無駄な移動は全くないが，要素作業の時間構成では移動時間が約4割で最も多く，枝払そのものは26％であった。伐木，玉切は1秒とかからない。また間伐でもかかり木は全く発生しない。枝払能率は17.8秒/本で，チェーンソー作業と最も差のつくところである。本機の造材機能を十分活かして林内で玉切・はい積した後，フォアワーダでこれを効率よく集材していけば，省力化による高能率作業が期待できる。間伐木の伐木造材の作業能率は従来のチェーンソー作業の2.5～6倍になる。この伐木造材費用は3108円/m3となり，機械価格が高くても生産性が高いため，チェーンソー作業に比して採算が取れ，今後の人件費上昇に対しては益々有利となる。本機を十分活用するためには180～340ha/年の間伐林を必要とし，3000～5600haの人工林が目安として与えられる。本機の所要路網密度は，1日の作業限界から，7.3m/haとなるが，集材作業のための集材車両の所要路網密度に包含することができる。","subitem_description_type":"Abstract"},{"subitem_description":"Average processing time of a MAKERI harvester 35 T was 67.8 sec/tree from our experiments of thinning larch. It can fell, delimb, buck, and pile simultaneously which also makes moving time a minimum. Time expenditure is 40% for moving, 26% for delimbing, and almost 0% for felling and bucking. There were no hang-ups even in thinning operations. Productivity of delimbing was 17.8 sec/tree which is the greatest difference from chain-saw operations. The combination of forwarders and this harvester will bring high productivity to one-man operations. Total productivity of this machine is as much as 2.5～6.0 of that of chain-saw operations, and the cost is 3108 yen/m3. The harvester will overcome increasing labor costs because of its high productivity. It requires a thinning area of 180～340 ha per year or plantation forests of 3000～5600 ha per year. Although the minimum forest-road network for this machine is 7.3 m/ha calculated from the working area per day, this figure can be included in that for forwarders.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"55449","nameIdentifierScheme":"WEKO"}],"names":[{"name":"SAKAI, Hideo"}]},{"nameIdentifiers":[{"nameIdentifier":"55450","nameIdentifierScheme":"WEKO"}],"names":[{"name":"MINAMIKATA, Yasushi"}]}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学大学院農学生命科学研究科附属演習林"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162451","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03716007","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"610","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"The Tokyo University Forests"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学農学部林学科"},{"subitem_text_value":"宇都宮大学農学部林学科"},{"subitem_text_value":"Department of Forestry, Faculty of Agriculture, University of Tokyo"},{"subitem_text_value":"Department of Forestry, Faculty of Agriculture, Utsunomiya University"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"酒井, 秀夫"}],"nameIdentifiers":[{"nameIdentifier":"55447","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"南方, 康"}],"nameIdentifiers":[{"nameIdentifier":"55448","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-09"}],"displaytype":"detail","filename":"esrh077004.pdf","filesize":[{"value":"501.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"esrh077004.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/25570/files/esrh077004.pdf"},"version_id":"c58bd988-430e-4497-9bf2-39e8f2ed33cc"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"ハーベスタによる伐木造材作業","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"ハーベスタによる伐木造材作業"}]},"item_type_id":"4","owner":"1","path":["2588","2587"],"pubdate":{"attribute_name":"公開日","attribute_value":"2014-09-03"},"publish_date":"2014-09-03","publish_status":"0","recid":"25570","relation_version_is_last":true,"title":["ハーベスタによる伐木造材作業"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T04:03:46.458785+00:00"}