JP3596362B2

JP3596362B2 - Plant seedling storage shelf

Info

Publication number: JP3596362B2
Application number: JP20851499A
Authority: JP
Inventors: 章英工藤; 正人宮丸; 智恵利久保田
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 1999-07-23
Filing date: 1999-07-23
Publication date: 2004-12-02
Anticipated expiration: 2019-07-23
Also published as: JP2001028946A

Description

【０００１】
【発明の属する技術分野】
本発明は、野菜や花卉などの植物苗を低温環境下にて貯蔵する際に適した照明装置を備えた植物苗保存棚に関するものである。
【０００２】
【従来の技術】
従来から、多くの場合、植物苗の貯蔵は低温暗黒下にて行われてきた。しかし、保存期間が長くなるにつれて、苗の徒長、黄化等によって苗質の低下することが問題となっっており、長期間にわたる貯蔵は困難とされていた。近年、低温下にて適当な強度の光を苗に照射することによって、苗の徒長、あるいは黄化を防ぐことができて、苗質を低下させることなく、より長い期間にわたって貯蔵できることが明らかになってきている。
【０００３】
一方、植物苗の保存用として、特開昭６３−１８５３１７として開示されている、支持体と、この支持体に支持されて照明装置が設けられた植物等の培養用の棚と、前記照明装置の照度を予め設定された値に制御する調光装置とを備えた照明装置が提案されている。このものは、培養植物の成長度にあわせて照度の設定が容易にできて排熱が良好であり、電力費を低減可能な植物の培養棚に使用するに適したものである。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来の技術のものにおいては、光の強度の調節を誤って、強くしたときには苗が生育し、また、弱すぎたときには暗黒下と同様に徒長、黄化することとなる。
【０００５】
ところで、最近の詳しい研究によると、貯蔵時において苗に照射する光の強度は、光補償点の条件が適切であることが明らかになってきている。この光補償点とは、植物の光合成における、二酸化炭素の吸収と呼吸による二酸化炭素の排出とがつりあって、見かけ上の空気中の二酸化炭素濃度の増減がゼロとなる点である（参考文献：ＡｃｔａＨｏｒｔｉｃｕｌｔｕｒａｅＮｏ．３９３，Ｍａｒｃｈ、１９９５久保田、古在ら）。
【０００６】
また、さらに参考文献として、「農業および園芸」（第７２巻第６号１９９７小澤）には、白熱灯を照射距離５０ｃｍで点灯させ、被照射面の照度を均一化させるとともに白熱灯の熱による葉焼けの防止を図ったもの、あるいは、「生物環境調節３４（２）」（１３５〜１３９１９９６久保田、古在ら）には、蛍光灯を近接照射させて空間の利用効率向上を図ったものが紹介されている。
【０００７】
一般に、苗の貯蔵は、低温環境下の空間の利用効率を向上させるために多段式貯苗棚を用いることが望ましい。しかし、上記の前者のものは空間の利用効率が悪く、あるいは後者のものは照度の均一化が図れないという問題があった。すなわち、照度が不均一な場合、貯蔵される苗が生育することもあって、苗高さ、苗質に影響を及ぼすことがあり、厳密に光補償点に調節しないときには、生育あるいは枯れが生ずることとなって苗質の維持ができないという問題があった。
【０００８】
本発明は、上記事由に鑑みてなしたもので、その目的とするところは、苗貯蔵における空間の利用効率を向上させるとともに苗質の維持が可能な植物苗保存棚を提供することにある。
【０００９】
【課題を解決するための手段】
上記目的を達成するために、本発明の植物苗保存棚にあっては、上下に設置された複数の棚板間に、その下方に配設された平坦状の苗箱へ向けて、同苗箱の全面が略同一の照度となるよう照光する面状の照光部を有する照明装置を設けてなることを特徴としている。
【００１０】
この構成により、上下の複数の棚板間の下方に配設される平坦状の苗箱が、その上方に設置された照明装置の面状の照光部から、同苗箱の全面が略同一の照度となるよう照光される。
【００１１】
そして、上記照光部を、苗箱に設けられる苗の上部との間隔が略１０ｃｍとなるよう位置させて、発光のパターンがその中央部から周辺部にかけて同心状に高輝度とすることが好ましい。
【００１２】
この場合、苗箱内全面の苗は、その上部から上方略１０ｃｍの位置に設置された照明装置の、発光のパターンをその中央部から周辺部にかけて同心状に高輝度とした面状の照光部から、その全面が略同一の照度となるよう照光される。
【００１３】
また、上記苗箱を四角状とし、照光部を、同苗箱と略同一の四角平面形状をもって形成し、その平面の一対向辺にそれぞれ線状の光源を配設させるとともに、その光源間に照光面の発光の輝度比を所定の割合値とする同心状パターンの拡散反射部をもつ導光板を設けるのが好ましい。
【００１４】
この場合、照光部は、四角状の苗箱と略同一の四角平面形状をもって、同平面の一対向辺にそれぞれ線状の光源が配設され、その光源間に照光面の発光の輝度比を所定の割合値とする同心状パターンの拡散反射部をもつ導光板が設けられて面状に形成される。
【００１５】
また、上記苗箱を四角状とし、照光部を、同苗箱と略同一の四角平面形状をもって形成し、その平面の一対向辺より内側にそれぞれ線状の光源を配設させるとともに、その光源の、後部に断面略Ｍ字状の反射板、前部には照光面の発光の輝度比を所定の割合値とする同心状パターンの遮光部をもつ透光カバーを設けるのも好ましい。
【００１６】
この場合、照光部は、四角状の苗箱と略同一の四角平面形状をもって、同平面の一対向辺より内側にそれぞれ線状の光源が配設され、その光源の、後部に断面略Ｍ字状の反射板、前部には照光面の発光の輝度比を所定の割合値とする同心状パターンの遮光部をもつ透光カバーが設けられて面状に形成される。
【００１７】
また、上記苗箱に設けられる苗の上部位置の照度が、５０〜２０００ルクスの間の所定の照度値であることが好ましい。
【００１８】
この場合、上下の複数の棚板間の下方に配設される平坦状の苗箱が、その上方に設置された照明装置の面状の照光部から、同苗箱の全面の苗の上部位置の照度が、５０〜２０００ルクスの間の所定の照度値となるよう照光される。
【００１９】
また、上記苗箱に設けられる苗の上部位置の照度を、５０〜２０００ルクスの間の所望の照度値とする照度調節部を設けるのが好ましい。
【００２０】
この場合、上下の複数の棚板間の下方に配設される平坦状の苗箱が、その上方に設置された照明装置に設けられる照度調節部にて、その面状の照光部から同苗箱の全面の苗の上部位置の照度が、５０〜２０００ルクスの間の所望の照度値となるよう調節し照光できる。
【００２１】
【発明の実施の形態】
図１乃至図４は、本発明の請求項１及び３に対応する第１の実施の形態を示し、図５、６は、本発明の請求項２及び４に対応する第２の実施の形態を示している。
【００２２】
［第１の実施の形態］
図１は、第１の実施の形態の植物苗保存棚を示す概略構成図である。図２は、同植物苗保存棚の照明装置を示す図で、（ａ）は平面図、（ｂ）は側面断面図である。図３は、同植物苗保存棚の照明装置の照光部の説明図である。図４は、同植物苗保存棚の照明装置の比較説明のための従来例の照光部の説明図である。
【００２３】
この実施の形態の植物苗保存棚１は、上下に設置された複数の棚板２，２間に、その下方に配設された平坦状の苗箱３へ向けて、同苗箱３の全面が略同一の照度となるよう照光する面状の照光部５を有する照明装置４を設けてなる。
【００２４】
又、該実施の形態の植物苗保存棚１においては、照光部５を、苗箱３に設けられる苗３１の上部との間隔が略１０ｃｍとなるよう位置させて、発光のパターンがその中央部から周辺部にかけて同心状に高輝度となるようなしてもいる。又、該実施の形態の植物苗保存棚１においては、苗箱３を四角状とし、照光部５を、同苗箱３と略同一の四角平面形状をもって形成し、その平面の一対向辺にそれぞれ線状の光源６，６を配設させるとともに、その光源６，６間に照光面の発光の輝度比を所定の割合値とする同心状パターンの拡散反射部８をもつ導光板７を設けてもいる。又、該実施の形態の植物苗保存棚１においては、苗箱３に設けられる苗３１の上部位置の照度を、５０〜２０００ルクスの間の所定の照度値としてもいる。
【００２５】
詳しくは、この植物苗保存棚１は、野菜や花卉などの植物苗を、低温環境下にて徒長、黄化等させることなく光補償点を維持させ貯蔵するためのものであり、複数の棚板２が上下に多段に設置され、その棚板２，２間に苗箱３及び照明装置４が配設されて形成されている。
【００２６】
苗箱３は、この場合四角状で、棚板２の上面に前後等にスライドさせて出し入れ自在に設けられている。この棚板２の下面には、後述する照明装置４が苗箱３内に設けられる苗３１の上部間との距離が略１０ｃｍとなるように取着されている。この苗箱３は、この場合、苗３１の苗高さが２０ｃｍ以下の定植前の幼少苗を想定して設けられるが、棚板２を支持させる支持具２１を、苗３１の高さに合わせて両側の支柱１４に調節自在となるよう取着させ支持させても良い。
【００２７】
この照明装置４は、照光部５となる下面蓋５１の設けられる、一面開口の薄型直方体状の箱体４１の開口部が下面となるよう上記棚板２の下面に取着され、この箱体４１内に、光源６と、導光板７と、点灯制御部となるインバータ部９とが設けられて形成されている。下面蓋５１は、その全面にわたって照光部５となるように、透明あるいは乳白色の透光性のアクリル樹脂板にて形成されている。
【００２８】
光源６は、この場合、線状の冷陰極管にて形成されて、２本づつを連設し対向させて、上記箱体４１の長辺側底部に配設されている。したがって、苗箱に設けられる苗には熱が加わることが無く、低温環境下にて容易に光補償点に維持させやすい。この光源６には、断面略コ字状の長尺のリフレクタ６１が、その開口を内側に向くようにその周囲に設けられており、箱体４１の側部に設けられているインバータ部９にてその点灯が制御され、後述する導光板７へ向けて光源６から発せられる光が導かれ、後述するように最大２０００ルクスを達成するようになっている。
【００２９】
導光板７は、光源６から発せられる光を下面蓋５１へ向けて導くためのもので、アクリル樹脂板にて形成され、その背面側に拡散反射部８が構成されている。この拡散反射部８は、光源６から発せられる光が下面蓋５１の発光の輝度比を所定の割合値とするためのもので、この場合、図３（ａ）に示すように、下面蓋５１の中央部から周辺部にかけて６０％、７０％、８５％、１００％と順に同心状に高輝度となるよう導光板７の裏面にパターン印刷された印刷面７１と、この印刷面７１に密接させ配設される拡散反射シート８１とにて構成されており、５０〜２０００ルクスの範囲で且つ略同一の照度となるようにパターン印刷を設定している。その結果、このものにおいては、下面蓋５１の１０ｃｍ下方の苗箱の四角状の範囲における、照度の変動を照度の最小値と最大値との比において０．９以上と良好に維持することができる。なお、拡散反射シート８１に直接遮光パターンを印刷して、所望の照度とするような拡散反射シート８１を入れ替え自在としても良い。上記の如く、５０〜２０００ルクスの範囲で且つ略同一の照度とすることにて、各種の野菜や花卉などの植物苗を、低温環境下にて光補償点を維持させて貯蔵することができで、より多くの種類の苗の保存に適用できる。
【００３０】
なお、従来の技術の項にて説明した図４（ａ）に示す構成の２０Ｗの直管形蛍光灯を１灯用いた光源Ａによる照明装置の下面の１０ｃｍ下方の苗箱の四角状の範囲における照度の変動は、図４（ｂ）に示すような同心状に明るい部分と暗い部分とをもって照度の最小値と最大値との比において０．３以下の照度の構成であり、このものに比べて上記のものは、苗箱の全面を略同一の照度とすることができる。
【００３１】
上記の植物苗保存棚１においては、上下の複数の棚板２，２間の下方に配設される平坦状の苗箱３の略全面にわたって各種の野菜や花卉などの苗３１が配置される。そして、苗３１の上方に設置された照明装置４の面状の照光部５から、同苗箱３の全面が５０〜２０００ルクスの範囲の略同一の所望の照度となるよう照光し、低温環境下にて光補償点を維持させて貯蔵させる。
【００３２】
このとき、苗箱３内全面の苗３１を、その上部から上方略１０ｃｍの位置に設置された照明装置４の、発光のパターンをその中央部から周辺部にかけて同心状に高輝度とした面状の照光部５から、その全面が略同一の照度となるよう照光し、狭い空間により多くの苗を保存することができる。また、照明装置４の照光部５が、四角状の苗箱３と略同一の四角平面形状をもって、同平面の一対向辺にそれぞれ線状の光源６を配設させ、その光源６，６間に照光部５の照光面の発光の輝度比を所定の割合値とする同心状パターンの拡散反射部をもつ導光板７を設けて面状に形成されて、より薄型に照明装置４が構成されることによってより狭い空間に多くの苗を保存させることができる。
【００３３】
したがって、以上説明した植物苗保存棚１によると、上下の複数の棚板２，２間の下方に配設される平坦状の苗箱３が、その上方に設置された照明装置４の面状の照光部５から、同苗箱３の全面が略同一の照度となるよう照光されるので、苗貯蔵における空間の利用効率を向上させることができて、苗質を良好に維持させることが出来る。
【００３４】
そして、苗箱３内全面の苗３１は、その上部から上方略１０ｃｍの位置に設置された照明装置４の、発光のパターンをその中央部から周辺部にかけて同心状に高輝度とした面状の照光部５から、その全面が略同一の照度となるよう照光されるので、狭い空間により多くの苗を保存することができる。また、照光部５は、四角状の苗箱３と略同一の四角平面形状をもって、同平面の一対向辺にそれぞれ線状の光源６が配設され、その光源６，６間に照光面の発光の輝度比を所定の割合値とする同心状パターンの拡散反射部８をもつ導光板７が設けられて面状に形成されるので、より薄型に照明装置４が構成されることによってより狭い空間に多くの苗３１を保存させることができ、しかも、上下の複数の棚板２，２間の下方に配設される平坦状の苗箱が、その上方に設置された照明装置の面状の照光部から、同苗箱３の全面の苗の上部位置の照度が、５０〜２０００ルクスの間の所定の照度値となるよう照光されるされるので、各種の野菜や花卉などの植物苗を、低温環境下にて光補償点を維持させて貯蔵することができで、より多くの種類の苗の保存に適用できて使い勝手は良好である。
【００３５】
［第２の実施の形態］
図５は、第２の実施の形態の植物苗保存棚の照明装置を示す図で、（ａ）は平面図、（ｂ）は側面断面図である。図６は、同植物苗保存棚の照明装置の照光部の説明図である。
【００３６】
この実施の形態の植物苗保存棚は、照明装置４の構成のみが第１の実施の形態と異なるもので、他の構成部材は第１の実施の形態のものと同一で、該実施の形態の植物苗保存棚１は、苗箱３を四角状とし、照光部５を、同苗箱と略同一の四角平面形状をもって形成し、その平面の一対向辺より内側にそれぞれ線状の光源６，６を配設させるとともに、その光源６，６の、後部に断面略Ｍ字状の反射板１０、前部には照光面の発光の輝度比を所定の割合値とする同心状パターンの遮光部１２をもつ透光カバー１１を設けている。
【００３７】
又、該実施の形態の植物苗保存棚は、苗箱３に設けられる苗３１の上部位置の照度を、５０〜２０００ルクスの間の所望の照度値とする照度調節部１３を設けてもいる。
【００３８】
この植物苗保存棚１の照明装置４は、図５に示すような、照光部５となる透光カバー１１の設けられる、一面開口の薄型直方体状の箱体４２の開口部が下面となるよう前述の棚板２の下面に取着され、この箱体４２内に、その底部の一対向辺より内側にそれぞれ線状の光源６，６と、点灯制御部となるインバータ部９とが設けられて形成されている。上記光源６，６の背面となる後部には、白色に着色された鋼板製で断面略Ｍ字状に折曲された反射板１０が、インバータ部９を隠蔽し、また、後述する並設された光源６どうしの光が干渉しあわないよう分離するようにして配設されている。
【００３９】
光源６は、この場合、線状の冷陰極管にて形成されて、２本づつを連設されて箱体４２の長辺側底部に沿設されている。したがって、苗箱３に設けられる苗３１には熱が加わることが無く、低温環境下にて容易に光補償点に維持させやすい。この光源６は、箱体４２底部に設けられているインバータ部９にてその点灯が制御され、４本が一括して照度調節部１３にて調光比５〜１００％となるように調光される。そして、後述する透光カバー１１表面の発光のパターンがその中央部から周辺部にかけて同心状に高輝度となっており、各種の野菜や花卉などの植物苗を、容易に多くの種類の苗の保存に適用させて低温環境下にて光補償点を維持させて貯蔵することができるように、苗箱３に設けられる苗３１の上部位置の照度を５０〜２０００ルクスの間の所望の照度値に調節可能となっている。
【００４０】
透光カバー１１は、アクリル樹脂板にて形成され、その背面側に、図６に示す如く微細ドットが印刷され同透光カバー１１の表面の発光のパターンを中央部から周辺部にかけて同心状に高輝度となるよう遮光する遮光部１２が設けられて構成されている。
【００４１】
上記の植物苗保存棚１においては、上下の複数の棚板２，２間の下方に配設された平坦状の苗箱３の略全面にわたって配置される各種の野菜や花卉などの苗３１に、四角状の苗箱３と略同一の四角平面形状をもって、同平面の一対向辺より内側にそれぞれ線状の光源６，６が配設され、その光源６の、後部に断面略Ｍ字状の反射板１０、前部に照光面の発光の輝度比を所定の割合値とする同心状パターンの遮光部１２をもつ透光カバー１１の設けられた、より簡単な構成による安価な照明装置４の面状形成された照光部５から、該苗箱３の全面が５０〜２０００ルクスの間の所望の照度値となるよう調節し照光し、低温環境下にて光補償点を維持させて苗を保存し貯蔵させることができる。
【００４２】
したがって、以上説明した植物苗保存棚１によると、照光部５は、四角状の苗箱３と略同一の四角平面形状をもって、同平面の一対向辺より内側にそれぞれ線状の光源６が配設され、その光源６の、後部に断面略Ｍ字状の反射板１０、前部には照光面の発光の輝度比を所定の割合値とする同心状パターンの遮光部１２をもつ透光カバー１１が設けられて面状に形成されるので、より簡単な構成にて安価にて照明装置４に照光部５を面状形成できる。
【００４３】
そして、上下の複数の棚板２，２間の下方に配設される平坦状の苗箱３が、その上方に設置された照明装置４に設けられる照度調節部１３にて、その面状の照光部５から同苗箱３の全面の苗の上部位置の照度が、５０〜２０００ルクスの間の所望の照度値となるよう調節し照光できるので、容易に多くの種類の苗の保存に適用させて低温環境下にて光補償点を維持させて貯蔵することができる。
【００４４】
なお、本発明は、植物苗保存棚の照明装置の構成は上記に示されたもの以外に、各種の実施の形態のものを含むことは言うまでもない。
【００４５】
【発明の効果】
本発明の植物苗保存棚は、上述の実施態様の如く実施されて、上下の複数の棚板間の下方に配設される平坦状の苗箱が、その上方に設置された照明装置の面状の照光部から、同苗箱の全面が略同一の照度となるよう照光されるので、苗貯蔵における空間の利用効率を向上させることができて、苗質を良好に維持させることが出来る。
【００４６】
そして、苗箱内全面の苗は、その上部から上方略１０ｃｍの位置に設置された照明装置の、発光のパターンをその中央部から周辺部にかけて同心状に高輝度とした面状の照光部から、その全面が略同一の照度となるよう照光されるので、狭い空間により多くの苗を保存することができる。
【００４７】
また、照光部は、四角状の苗箱と略同一の四角平面形状をもって、同平面の一対向辺にそれぞれ線状の光源が配設され、その光源間に照光面の発光の輝度比を所定の割合値とする同心状パターンの拡散反射部をもつ導光板が設けられて面状に形成されるので、より薄型に照明装置が構成されることによってより狭い空間に多くの苗を保存させることができる。
【００４８】
また、照光部は、四角状の苗箱と略同一の四角平面形状をもって、同平面の一対向辺より内側にそれぞれ線状の光源が配設され、その光源の、後部に断面略Ｍ字状の反射板、前部には照光面の発光の輝度比を所定の割合値とする同心状パターンの遮光部をもつ透光カバーが設けられて面状に形成されるので、より簡単な構成にて安価にて照明装置に照光部を面状形成できる。
【００４９】
また、上下の複数の棚板間の下方に配設される平坦状の苗箱が、その上方に設置された照明装置の面状の照光部から、同苗箱の全面の苗の上部位置の照度が、５０〜２０００ルクスの間の所定の照度値となるよう照光されるので、より多くの種類の苗の保存に適用できて使い勝手は良好である。
【００５０】
また、上下の複数の棚板間の下方に配設される平坦状の苗箱が、その上方に設置された照明装置に設けられる照度調節部にて、その面状の照光部から同苗箱の全面の苗の上部位置の照度が、５０〜２０００ルクスの間の所望の照度値となるよう調節し照光できるので、容易に多くの種類の苗の保存に適用させて低温環境下にて光補償点を維持させて貯蔵することができる。
【００５１】
【図面の簡単な説明】
【図１】本発明の第１の実施の形態の植物苗保存棚を示す概略構成図である。
【図２】同植物苗保存棚の照明装置を示す図で、（ａ）は平面図、（ｂ）は側面断面図である。
【図３】同植物苗保存棚の照明装置の照光部の説明図である。
【図４】同植物苗保存棚の照明装置の比較説明のための従来例の照光部の説明図である。
【図５】第２の実施の形態の植物苗保存棚の照明装置を示す図で、（ａ）は平面図、（ｂ）は側面断面図である。
【図６】同植物苗保存棚の照明装置の照光部の説明図である。
【符号の説明】
１植物苗保存棚
２棚板
３苗箱
３１苗
４照明装置
５照光部
６光源
７導光板
８拡散反射部
１０反射板
１１透光カバー
１２遮光部
１３照度調節部[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a plant seedling storage shelf provided with a lighting device suitable for storing plant seedlings such as vegetables and flowers in a low-temperature environment.
[0002]
[Prior art]
Conventionally, in many cases, storage of plant seedlings has been performed under low temperature and darkness. However, as the storage period becomes longer, there is a problem that the quality of the seedlings is degraded due to the length and yellowing of the seedlings, and it has been difficult to store the seedlings for a long time. In recent years, by irradiating seedlings with light of appropriate intensity under low temperatures, it is clear that seedlings can be prevented from growing or yellowing, and can be stored for a longer period without lowering seedling quality. It has become to.
[0003]
On the other hand, for preserving plant seedlings, a support disclosed in Japanese Patent Application Laid-Open No. 63-185317, a shelf for culturing plants and the like provided with an illumination device supported by the support, and the illumination device There has been proposed a lighting device including a light control device that controls the illuminance of a light to a preset value. This is suitable for use in a plant culture shelf that can easily set the illuminance in accordance with the growth degree of the cultured plant, discharges heat well, and can reduce the power cost.
[0004]
[Problems to be solved by the invention]
However, in the above-mentioned conventional technology, seedlings grow when the intensity of light is erroneously adjusted to be high, and when the intensity is too weak, the seedlings grow and yellow as in the darkness.
[0005]
By the way, according to recent detailed research, it is becoming clear that the intensity of the light irradiating the seedling during storage is appropriate for the condition of the light compensation point. The light compensation point is a point where absorption of carbon dioxide and emission of carbon dioxide due to respiration balance in photosynthesis of a plant, and the apparent increase and decrease in the concentration of carbon dioxide in the air become zero (references: Acta Horticulturae No. 393, March, 1995 Kubota, Furuzou et al.).
[0006]
Further, as a reference, “Agriculture and Horticulture” (Vol. 72, No. 6, 1997, Ozawa) discloses that an incandescent lamp is turned on at an irradiation distance of 50 cm to uniformize the illuminance of a surface to be illuminated, and heat generated by the incandescent lamp For the purpose of preventing leaf burning, or "Biological Environment Control 34 (2)" (135-139 1996 Kubota, Kozai et al.), The use of fluorescent light in close proximity to improve the space utilization efficiency Is introduced.
[0007]
Generally, it is desirable to use a multistage seedling storage rack for storing seedlings in order to improve the efficiency of using space in a low-temperature environment. However, the former has a problem in that the space utilization efficiency is poor, and the latter has a problem that the illuminance cannot be made uniform. In other words, when the illuminance is uneven, the seedlings to be stored may grow, which may affect the height of the seedlings and the quality of the seedlings. If the light compensation point is not strictly adjusted, growth or withering occurs. As a result, there was a problem that the seedling quality could not be maintained.
[0008]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a plant seedling storage shelf capable of improving the efficiency of space utilization in storing seedlings and maintaining seedling quality.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, in the plant seedling storage shelf of the present invention, the seedlings are placed between a plurality of vertically arranged shelves and toward a flat seedling box disposed therebelow. It is characterized in that an illumination device having a planar illumination section for illuminating the entire surface of the box with substantially the same illuminance is provided.
[0010]
With this configuration, the flat seedling box disposed below the plurality of upper and lower shelves is substantially the same as the entire seedling box from the planar illuminating portion of the lighting device installed above the flat seedling box. It is illuminated to be illuminated.
[0011]
Then, it is preferable that the illuminating portion is positioned so that the distance from the upper portion of the seedling provided in the seedling box is approximately 10 cm, and the light emission pattern is concentrically high in brightness from the central portion to the peripheral portion.
[0012]
In this case, the seedling on the entire surface of the seedling box is a planar illuminating part whose lighting pattern is concentrically high in brightness from the central part to the peripheral part of the illuminating device installed approximately 10 cm above the upper part thereof. Therefore, the entire surface is illuminated to have substantially the same illuminance.
[0013]
In addition, the seedling box is formed in a square shape, and the illuminating portion is formed to have substantially the same rectangular plane shape as that of the seedling box, and a linear light source is arranged on one opposing side of the plane, and between the light sources. It is preferable to provide a light guide plate having a concentric pattern of diffuse reflection portions having a predetermined ratio of the luminance ratio of the light emitted from the illumination surface.
[0014]
In this case, the illuminating section has a rectangular planar shape substantially the same as the rectangular seedling box, and a linear light source is disposed on each of opposite sides of the same plane, and the luminance ratio of light emission of the illuminating surface is set between the light sources. A light guide plate having a concentric pattern of diffuse reflection portions having a predetermined ratio value is provided and formed in a planar shape.
[0015]
Further, the seedling box is formed in a rectangular shape, and the illuminating portion is formed with a substantially same rectangular planar shape as the seedling box, and a linear light source is disposed inside one opposing side of the plane, and the light source is provided. It is also preferable to provide a reflection plate having a substantially M-shaped cross section at the rear and a light-transmitting cover having a light-shielding portion of a concentric pattern with a predetermined ratio of the luminance ratio of the light emitted from the illuminating surface at the front.
[0016]
In this case, the illuminating section has a rectangular planar shape substantially the same as the rectangular seedling box, and a linear light source is disposed inside one opposing side of the same plane, and a substantially M-shaped cross section is provided at the rear of the light source. A light-transmitting cover having a concentric pattern of light-shielding portions having a predetermined ratio of the luminance ratio of the light emitted from the illuminating surface is provided at the front of the reflection plate, and is formed in a planar shape.
[0017]
Further, it is preferable that the illuminance at an upper position of the seedling provided in the seedling box has a predetermined illuminance value between 50 and 2000 lux.
[0018]
In this case, the flat seedling box disposed below the plurality of upper and lower shelves is positioned above the seedling box on the entire surface of the seedling box from the planar illuminating portion of the lighting device installed thereabove. Is illuminated so as to have a predetermined illuminance value between 50 and 2000 lux.
[0019]
In addition, it is preferable to provide an illuminance adjustment unit that sets the illuminance at the upper position of the seedling provided in the seedling box to a desired illuminance value between 50 and 2000 lux.
[0020]
In this case, a flat seedling box disposed below the plurality of upper and lower shelves is illuminated by an illuminance adjustment unit provided in a lighting device installed above the flat seedling box from the planar illuminating unit. The illuminance at the upper position of the seedling on the entire surface of the box can be adjusted and illuminated so as to have a desired illuminance value of 50 to 2000 lux.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1 to 4 show a first embodiment corresponding to claims 1 and 3 of the present invention, and FIGS. 5 and 6 show a second embodiment corresponding to claims 2 and 4 of the present invention. Is shown.
[0022]
[First Embodiment]
FIG. 1 is a schematic configuration diagram illustrating a plant seedling storage shelf according to the first embodiment. 2A and 2B are diagrams showing a lighting device of the plant seedling storage shelf, wherein FIG. 2A is a plan view and FIG. 2B is a side sectional view. FIG. 3 is an explanatory diagram of an illuminating unit of the illuminating device of the plant seedling storage shelf. FIG. 4 is an explanatory view of a lighting unit of a conventional example for comparative explanation of a lighting device of the plant seedling storage shelf.
[0023]
The plant seedling storage shelf 1 of this embodiment is provided between a plurality of shelves 2 and 2 installed vertically and toward a flat seedling box 3 disposed below the shelf plates 2 and 2. Is provided with an illumination device 4 having a planar illumination unit 5 for illuminating the illumination light so that the illumination light has substantially the same illuminance.
[0024]
Further, in the plant seedling storage shelf 1 of the embodiment, the illuminating part 5 is positioned so that the distance from the upper part of the seedling 31 provided in the seedling box 3 is approximately 10 cm, and the light emission pattern is in the central part. In some cases, the brightness increases concentrically from the edge to the periphery. Further, in the plant seedling storage shelf 1 of the embodiment, the seedling box 3 is formed in a square shape, and the illuminating unit 5 is formed to have substantially the same rectangular plane shape as the seedling box 3, and is formed on one opposite side of the plane. The linear light sources 6 and 6 are disposed, and a light guide plate 7 having a concentric pattern of diffuse reflection portions 8 having a predetermined ratio of the luminance ratio of the light emitted from the illuminating surface is provided between the light sources 6 and 6. I have. Further, in the plant seedling storage shelf 1 of this embodiment, the illuminance at the upper position of the seedling 31 provided in the seedling box 3 is set to a predetermined illuminance value between 50 and 2000 lux.
[0025]
More specifically, the plant seedling storage shelf 1 is used to store and store plant seedlings such as vegetables and flowers in a low-temperature environment without being prolonged or yellowed, etc. The plates 2 are installed in multiple stages vertically, and a seedling box 3 and a lighting device 4 are arranged between the shelves 2.
[0026]
The seedling box 3 has a rectangular shape in this case, and is provided on the upper surface of the shelf plate 2 so as to be slidable back and forth or the like so as to be freely taken in and out. A lighting device 4 to be described later is attached to the lower surface of the shelf plate 2 such that the distance between the upper portion of the seedling 31 provided in the seedling box 3 is approximately 10 cm. In this case, the seedling box 3 is provided on the assumption that the seedlings 31 have a seedling height of 20 cm or less before planting, and the support 21 for supporting the shelf 2 is adjusted to the height of the seedlings 31. Alternatively, it may be attached to and supported by the columns 14 on both sides so as to be adjustable.
[0027]
The illuminating device 4 is attached to the lower surface of the shelf plate 2 so that the opening of a thin rectangular parallelepiped box 41 having a one-sided opening provided with a lower cover 51 serving as the illuminating section 5 faces the lower surface. Inside 41, a light source 6, a light guide plate 7, and an inverter unit 9 serving as a lighting control unit are provided and formed. The lower cover 51 is formed of a transparent or milky white translucent acrylic resin plate so as to form the illuminating portion 5 over the entire surface.
[0028]
In this case, the light source 6 is formed of a linear cold-cathode tube, and is disposed at the bottom on the long side of the box 41 so that two light sources are connected in series and face each other. Therefore, no heat is applied to the seedlings provided in the seedling box, and the seedlings can be easily maintained at the light compensation point in a low-temperature environment. A long reflector 61 having a substantially U-shaped cross section is provided around the light source 6 so that the opening faces inward, and the reflector 61 is provided on the side of the box 41. The light emitted from the light source 6 is guided toward a light guide plate 7 described later, and achieves a maximum of 2000 lux as described later.
[0029]
The light guide plate 7 guides the light emitted from the light source 6 toward the lower cover 51, is formed of an acrylic resin plate, and has a diffuse reflection portion 8 on the back side. The diffuse reflection portion 8 is used for setting the luminance ratio of the light emitted from the light source 6 to the light emission of the lower cover 51 to a predetermined ratio value. In this case, as shown in FIG. A printed surface 71 on which a pattern is printed on the back surface of the light guide plate 7 so as to have high brightness concentrically in the order of 60%, 70%, 85%, and 100% from the central portion to the peripheral portion thereof, is brought into close contact with the printed surface 71. The pattern printing is set so as to have the same illuminance in the range of 50 to 2000 lux and substantially the same illuminance. As a result, in this case, in the square range of the seedling box 10 cm below the lower cover 51, it is possible to maintain the fluctuation of the illuminance as good as 0.9 or more in the ratio between the minimum value and the maximum value of the illuminance. it can. Note that a light-shielding pattern may be directly printed on the diffuse reflection sheet 81 so that the diffusion reflection sheet 81 having a desired illuminance can be freely replaced. As described above, by setting the illuminance in the range of 50 to 2,000 lux and substantially the same illuminance, plant seedlings such as various vegetables and flowers can be stored while maintaining the light compensation point in a low temperature environment. Thus, it can be applied to the preservation of more kinds of seedlings.
[0030]
The rectangular area of the seedling box 10 cm below the lower surface of the lighting device by the light source A using one 20 W straight tube fluorescent lamp having the configuration shown in FIG. The variation of the illuminance at the time is a configuration of the illuminance of 0.3 or less in the ratio between the minimum value and the maximum value of the illuminance in the concentric bright part and the dark part as shown in FIG. On the other hand, in the case of the above, the entire surface of the seedling box can have substantially the same illuminance.
[0031]
In the above-mentioned plant seedling storage shelf 1, seedlings 31 such as various vegetables and flowers are arranged over substantially the entire surface of a flat seedling box 3 provided below the upper and lower shelves 2 and 2. . Then, the entire surface of the seedling box 3 is illuminated from the planar illuminating part 5 of the illuminating device 4 installed above the seedlings 31 so that the same desired desired illuminance in the range of 50 to 2000 lux is obtained. The light compensation point is maintained and stored below.
[0032]
At this time, the seedlings 31 on the entire surface of the seedling box 3 are concentrically brightened from the central part to the peripheral part of the light emission pattern of the lighting device 4 installed approximately 10 cm above the upper part. From the illuminating section 5 so that the entire surface has substantially the same illuminance, and more seedlings can be stored in a narrow space. The illuminating section 5 of the illuminating device 4 has a rectangular planar shape substantially the same as that of the rectangular seedling box 3, and linear light sources 6 are respectively arranged on opposite sides of the same plane. Is provided with a light guide plate 7 having a diffuse reflection portion of a concentric pattern having a predetermined ratio of the luminance ratio of the light emitted from the illuminating surface of the illuminating portion 5 to a predetermined value. By doing so, more seedlings can be stored in a smaller space.
[0033]
Therefore, according to the plant seedling storage shelf 1 described above, the flat seedling box 3 disposed below the plurality of upper and lower shelves 2 and 2 has a planar shape of the lighting device 4 installed thereabove. From the illuminating section 5, the entire surface of the seedling box 3 is illuminated so as to have substantially the same illuminance, so that the space utilization efficiency in storing the seedlings can be improved, and the seedling quality can be favorably maintained. .
[0034]
The seedlings 31 on the entire surface of the seedling box 3 have a planar shape in which the light emission pattern of the lighting device 4 installed at a position approximately 10 cm above the upper part is concentrically high in brightness from the central part to the peripheral part. Since the entire surface is illuminated from the illuminating section 5 to have substantially the same illuminance, more seedlings can be stored in a narrow space. The illuminating section 5 has a rectangular planar shape substantially the same as that of the rectangular seedling box 3, and linear light sources 6 are respectively disposed on opposite sides of the same plane. Since the light guide plate 7 having the concentric pattern of the diffuse reflection portions 8 having the luminance ratio of light emission at a predetermined ratio value is provided and formed in a planar shape, the illumination device 4 is configured to be thinner and narrower. A large number of seedlings 31 can be stored in the space, and a flat seedling box disposed below the plurality of upper and lower shelves 2 is provided in a planar shape of the lighting device installed thereabove. Is illuminated from the illuminating part so that the illuminance at the upper position of the seedling on the entire surface of the seedling box 3 becomes a predetermined illuminance value of 50 to 2000 lux, so that plant seedlings such as various vegetables and flowers can be obtained. Can be stored in a low temperature environment while maintaining the light compensation point. Usability can be applied to storage of seedlings is good.
[0035]
[Second embodiment]
FIGS. 5A and 5B are diagrams showing a lighting device for a plant seedling storage shelf according to the second embodiment, wherein FIG. 5A is a plan view and FIG. 5B is a side sectional view. FIG. 6 is an explanatory diagram of an illuminating unit of the illuminating device of the plant seedling storage shelf.
[0036]
The plant seedling storage shelf of this embodiment is different from the first embodiment only in the configuration of the lighting device 4, and the other components are the same as those of the first embodiment. In the plant seedling storage shelf 1, the seedling box 3 is formed in a square shape, and the illuminating portion 5 is formed in the same rectangular plane shape as that of the seedling box. , 6 are arranged, and a reflection plate 10 having a substantially M-shaped cross section is provided at the rear of the light sources 6 and 6, and a concentric pattern of light having a predetermined ratio of the luminance ratio of the light emitted from the illuminating surface is provided at the front. A light-transmitting cover 11 having a portion 12 is provided.
[0037]
In addition, the plant seedling storage shelf of this embodiment is provided with an illuminance adjustment unit 13 that sets the illuminance at the upper position of the seedling 31 provided in the seedling box 3 to a desired illuminance value between 50 and 2000 lux. .
[0038]
As shown in FIG. 5, the lighting device 4 of the plant seedling storage shelf 1 is such that the light-transmitting cover 11 serving as the illuminating portion 5 is provided, and the opening of the thin rectangular parallelepiped box 42 with one opening is the lower surface. Inside the box 42, linear light sources 6 and 6 and an inverter unit 9 serving as a lighting control unit are provided inside the box body 42 at one inside of one opposing side of the bottom. It is formed. A reflector 10 made of a steel plate colored in white and bent in a substantially M-shaped cross section conceals the inverter unit 9 and is provided in parallel at a rear portion serving as a back surface of the light sources 6 and 6. The light sources 6 are arranged so as to be separated from each other so as not to interfere with each other.
[0039]
In this case, the light source 6 is formed of a linear cold-cathode tube, and two light sources are connected to each other along the long side bottom of the box 42. Therefore, no heat is applied to the seedlings 31 provided in the seedling box 3, and the seedlings 31 can be easily maintained at the light compensation point in a low-temperature environment. The lighting of the light source 6 is controlled by an inverter unit 9 provided at the bottom of the box 42, and the four light sources are collectively dimmed by the illuminance adjusting unit 13 so as to have a dimming ratio of 5 to 100%. Is done. The light emission pattern on the surface of the light-transmitting cover 11, which will be described later, has high brightness concentrically from the central part to the peripheral part, and various kinds of plant seedlings such as vegetables and flowers can be easily obtained. The illuminance at the upper position of the seedling 31 provided in the seedling box 3 is set to a desired illuminance value of 50 to 2000 lux so that the illuminance can be stored and maintained at a light compensation point in a low-temperature environment by applying to storage. It is adjustable.
[0040]
The translucent cover 11 is formed of an acrylic resin plate, and fine dots are printed on the back side thereof as shown in FIG. 6, and the light emission pattern on the surface of the translucent cover 11 is concentric from the center to the periphery. A light-shielding portion 12 for shielding light so as to have high brightness is provided.
[0041]
In the above-mentioned plant seedling storage shelf 1, seedlings 31 of various kinds of vegetables and flowers are arranged over substantially the entire surface of a flat seedling box 3 disposed below a plurality of upper and lower shelves 2. The light sources 6 and 6 each having a linear shape substantially the same as that of the rectangular seedling box 3 are disposed inside one opposite side of the same plane, and the light source 6 has a substantially M-shaped cross section at the rear. And a light-transmitting cover 11 having a concentric pattern of light-shielding portions 12 having a predetermined ratio of the luminance ratio of the light emitted from the illuminating surface to a predetermined value. The seedling box 3 is illuminated by adjusting the entire surface of the seedling box 3 to have a desired illuminance value of 50 to 2000 lux from the illuminating part 5 formed in a plane, and maintaining the light compensation point in a low temperature environment. Can be stored and stored.
[0042]
Therefore, according to the plant seedling storage shelf 1 described above, the illuminating unit 5 has a rectangular planar shape substantially the same as the rectangular seedling box 3 and the linear light sources 6 are arranged inside one opposing side of the same plane. A light-transmitting cover having a reflector 10 having a substantially M-shaped cross section at the rear of the light source 6 and a light-shielding portion 12 having a concentric pattern having a predetermined ratio of the luminance ratio of the light emitted from the illuminating surface at the front. 11 is provided and formed in a planar shape, so that the illuminating unit 5 can be formed in a planar shape in the illumination device 4 with a simpler configuration and at low cost.
[0043]
Then, the flat seedling box 3 disposed below the upper and lower shelves 2 is illuminated by the illuminance adjustment unit 13 provided in the illuminating device 4 installed thereabove. Since the illuminance from the illuminating unit 5 to the upper position of the seedling on the entire surface of the seedling box 3 can be adjusted and illuminated to a desired illuminance value of 50 to 2000 lux, it can be easily applied to storage of many types of seedlings. Then, it can be stored while maintaining the light compensation point in a low temperature environment.
[0044]
The present invention is configured of the illumination device of the plant seedling storage shelves other than those indicated above, it is needless to say, including those of each species embodiment.
[0045]
【The invention's effect】
The plant seedling storage shelf of the present invention is implemented as in the above-described embodiment, and a flat seedling box disposed below a plurality of upper and lower shelves is provided on a surface of a lighting device installed above the shelf. Since the entire surface of the seedling box is illuminated with substantially the same illuminance from the illuminated portion, the efficiency of space utilization in storing the seedlings can be improved, and the seedling quality can be favorably maintained.
[0046]
Then, the seedlings on the entire surface of the seedling box are illuminated by a lighting device installed at a position approximately 10 cm above the upper part of the seedling box. Since the entire surface is illuminated to have substantially the same illuminance, more seedlings can be stored in a narrow space.
[0047]
The illuminating section has a rectangular planar shape substantially the same as that of the rectangular seedling box, and linear light sources are disposed on opposite sides of the same plane, respectively. Since a light guide plate having a concentric pattern of diffuse reflection portions having a ratio value of is provided and formed in a planar shape, it is possible to store many seedlings in a narrower space by configuring a thinner lighting device. Can be.
[0048]
The illuminating part has a rectangular planar shape substantially the same as the rectangular seedling box, and a linear light source is arranged inside one opposing side of the same plane, and a substantially M-shaped cross section is provided at the rear of the light source. A light-transmitting cover having a concentric pattern light-shielding portion having a predetermined ratio value of the luminance ratio of the light emitted from the illuminating surface is provided at the front of the reflector plate, and is formed in a planar shape. The illuminating portion can be formed in a plane on the lighting device at low cost.
[0049]
In addition, a flat seedling box disposed between a plurality of upper and lower shelves is moved from a planar illuminating portion of a lighting device installed above the seedling box to an upper position of a seedling on the entire surface of the seedling box. Since the illuminance is illuminated so as to have a predetermined illuminance value of 50 to 2000 lux, it can be applied to preservation of more kinds of seedlings, and the usability is good.
[0050]
Further, a flat seedling box disposed below the plurality of upper and lower shelves is illuminated by an illuminance adjustment unit provided in a lighting device installed above the flat seedling box. Can be adjusted and illuminated so that the illuminance at the upper position of the seedling on the entire surface of the seedling is a desired illuminance value between 50 and 2000 lux. The compensation point can be maintained and stored.
[0051]
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a plant seedling storage shelf according to a first embodiment of the present invention.
FIGS. 2A and 2B are diagrams showing a lighting device of the plant seedling storage shelf, wherein FIG. 2A is a plan view and FIG.
FIG. 3 is an explanatory diagram of an illuminating unit of the illuminating device of the plant seedling storage shelf.
FIG. 4 is an explanatory view of an illumination unit of a conventional example for comparative explanation of an illumination device of the plant seedling storage shelf.
FIGS. 5A and 5B are diagrams showing a lighting device for a plant seedling storage shelf according to the second embodiment, wherein FIG. 5A is a plan view and FIG.
FIG. 6 is an explanatory diagram of an illuminating unit of the illuminating device of the plant seedling storage shelf.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 Plant seedling storage shelf 2 Shelf 3 Seedling box 31 Seedling 4 Lighting device 5 Illumination unit 6 Light source 7 Light guide plate 8 Diffuse reflection unit 10 Reflection plate 11 Translucent cover 12 Light shielding unit 13 Illuminance adjustment unit

Claims

Between a plurality of vertically arranged shelves, toward a flat seedling box disposed therebelow, a planar illuminating portion that illuminates the entire surface of the seedling box so as to have substantially the same illuminance. A lighting device is provided , and the illuminating part is positioned so that the distance from the upper part of the seedling provided in the seedling box is approximately 10 cm, so that the light emission pattern becomes concentrically high in brightness from the central part to the peripheral part. a plant Mononae storage shelves without the seedling box with a square shape, illuminating portion, and formed with a same seedling box approximately the same square planar shape, arrangement of each linear light source to an opposite side of the plane together is set, concentric patterns you characterized planting Mononae store shelves in that a light guide plate having diffusion reflectors of which the predetermined ratio value luminance ratio of the light emission of the illuminating surface between the light source.

Between a plurality of vertically arranged shelves, toward a flat seedling box disposed therebelow, a planar illuminating portion that illuminates the entire surface of the seedling box so as to have substantially the same illuminance. A lighting device is provided, and the illuminating part is positioned so that the distance from the upper part of the seedling provided in the seedling box is approximately 10 cm, so that the light emission pattern becomes concentrically high in brightness from the central part to the peripheral part. In the plant seedling storage shelf made, the seedling box is formed in a square shape, the illuminating part is formed with the same square planar shape as the same seedling box, and a linear light source is provided inside one opposing side of the plane. The light source is provided with a light-transmitting cover having a reflector having a substantially M-shaped cross section at the rear and a light-shielding portion having a concentric pattern having a predetermined ratio value of the luminance ratio of the light emitted from the illuminating surface at the front. that planted Mononae store shelves to characterized by providing.

Illuminance in the upper position of the seedlings provided in seedling boxes, 50-2000 predetermined claim 1 or 2 in any one plant seedling storage shelf according to claim wherein it is the intensity value between lux.

The illuminance adjustment part which makes the illuminance of the upper position of the seedling provided in a seedling box the desired illuminance value between 50-2000 lux was provided, The Claim 1 or 2 characterized by the above-mentioned. Plant seedling storage shelf.