JP4058356B2 - Greenhouse film opener - Google Patents

Greenhouse film opener Download PDF

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JP4058356B2
JP4058356B2 JP2003012856A JP2003012856A JP4058356B2 JP 4058356 B2 JP4058356 B2 JP 4058356B2 JP 2003012856 A JP2003012856 A JP 2003012856A JP 2003012856 A JP2003012856 A JP 2003012856A JP 4058356 B2 JP4058356 B2 JP 4058356B2
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greenhouse film
closing device
guide rod
shaped member
shaft
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JP2004222563A (en
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孝信 有田
克夫 小野沢
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Seiwa KK
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Seiwa KK
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25Greenhouse technology, e.g. cooling systems therefor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/14Measures for saving energy, e.g. in green houses

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Description

【0001】
【発明の属する技術分野】
本発明は、温室の側面や谷部等に配設され、換気のために開閉される温室用フィルムを巻き取り又は巻き戻しして開閉するための温室用フィルム開閉装置に関する。
【0002】
【従来の技術】
例えば、温室の側面に換気用に設けられる巻き上げ式の温室用フィルムを開閉する装置としては、温室用フィルムの端部や中間部に固定された巻き取り軸を、ハンドルを用いて手動で回転させる装置や、モータを利用して回転駆動させる装置がある。但し、いずれにしても、駆動部の回転を巻き取り軸に伝達するためには、これらの装置には、駆動部の自転を防止する回り止め手段が必要となる。回り止め手段としては、特許文献1〜3に示されているように、例えば、地面にガイド用棒状部材を立設し、このガイド用棒状部材の周面に沿って上下に移動するガイドローラや車輪を備えた移動機構を駆動部に付設することが行われている。移動機構を構成するガイドローラや車輪がガイド用棒状部材に接することにより駆動部の自転が防止され、駆動部の回転力が巻き取り軸に伝達されるものである。このような移動機構を用いた場合には、駆動部は、温室用フィルムの巻き取り軸への巻き取り量に応じて、巻き取り軸と共にガイド用棒状部材に沿って上下動する。
【0003】
【特許文献1】
特開2001−128563号公報
【特許文献2】
実開平5−91297号公報
【特許文献3】
実開平6−6696号公報
【0004】
【発明が解決しようとする課題】
特許文献1〜3に開示された装置は、上記のように、移動機構を備えた駆動部が、巻き取り軸と共にガイド用棒状部材に沿って上下動するが、これは、いずれも巻き取り軸に巻き付けられる温室用フィルムに牽引されて上下するものである。このため、温室用フィルムのうち、特に駆動部側に近い部位において、駆動部の重さに伴う破損や伸びが発生し易い。特許文献1では、駆動部を構成するモータとして直流モータを用いて駆動部の軽量化を図り、温室用フィルムの破損や伸びを軽減しているが、それでもなお、駆動部の重さがそのまま温室用フィルムの負荷となる点で変わりはない。また、特許文献3では、バランス用のウェイト部材を配設することにより、駆動部の重さ相殺し、温室用フィルムに加わる負荷を軽減しているが、ウェイト部材を配設するに当たっては、駆動部とウェイト部材とを結ぶワイヤや、該ワイヤを巻き掛ける滑車をガイド用棒状部材に設けなければならないなど、構造が複雑で、製造コストが高くなる。
【0005】
また、例えば、巻き取り軸に温室用フィルムを巻き取っていくと、温室用フィルムを巻き取った状態での実質上の外径は、フィルムの厚さの積算分太くなっていく。このため、巻き取り軸の移動速度は、実質上の外径が太くなるほど、速くなる。これに対し、駆動部は、巻き取り軸の移動速度の影響を受けないとすれば、一定の速度でガイド用棒状部材に沿って移動しようとする。従って、温室用フィルムを巻き取り又は巻き戻すことによる巻き取り軸の移動速度と、駆動部の移動速度との間には、ずれがあり、このずれが巻き取り軸を蛇行させ、温室用フィルムに無理な力が加わる原因の一つとなっている。
【0006】
本発明は上記に鑑みなされたものであり、手動であるか電動であるか、あるいは直流モータであるか交流モータであるといった駆動部の種類に拘わらず、温室用フィルムに加わる駆動部の荷重に伴う負荷を軽減し、温室用フィルムの破損や伸びを抑制できる温室用フィルム開閉装置を提供することを課題とする。また、本発明は、簡易な構造で、駆動部の荷重に伴う温室用フィルムへの負荷を軽減できる温室用フィルム開閉装置を提供することを課題とする。また、本発明は、駆動部の移動速度と巻き取り軸の移動速度との間のずれを小さくし、巻き取り軸の蛇行を抑制できる温室用フィルム開閉装置を提供することを課題とする。
【0007】
【課題を解決するための手段】
上記した課題を解決するため、請求項1記載の本発明では、温室用フィルムを巻き取り又は巻き戻しして開閉する巻き取り軸を回転させる駆動部を備えた温室用フィルム開閉装置であって、
前記駆動部が、ガイド用棒状部材に沿って移動可能な移動機構を備えており、
該移動機構が、付勢手段によって、前記巻き取り軸と共に前記ガイド用棒状部材に押し付けられる方向に付勢される係合部を有し
前記係合部が、前記巻き取り軸とにより、前記ガイド用棒状部材を挟む位置関係で設けられ、前記付勢手段が、該係合部を前記巻き取り軸と共に前記ガイド用棒状部材に押し付ける方向に付勢するように、基端が前記駆動部のケーシングに連結され、他端が常態において互いに拡開方向に付勢される―対のバネ部を備えた弾性部材からなることを特徴とする温室用フィルム開閉装置を提供する。
請求項記載の本発明では、 前記弾性部材が、略M字状に屈曲されたバネ材からなり、外側に位置する各直線部により前記―対のバネ部が構成され、各直線部同士を連結する中間部と各直線部との交差部が、前記基端として、前記駆動部のケーシングに連結されていることを特徴とする請求項記載の温室用フィルム開閉装置を提供する。
請求項記載の本発明では、前記―対のバネ部の各他端が、前記ガイド用棒状部材を挟んで巻き取り軸の略反対側に位置するように屈曲されてガイド用棒状部材に押し付けられる方向に付勢され、該各他端が前記係合部を構成していることを特徴とする請求項又は記載の温室用フィルム開閉装置を提供する。
請求項記載の本発明では、前記―対のバネ部の各他端に、前記ガイド用棒状部材を挟んで巻き取り軸の略反対側に位置するガイドローラを設け、該ガイドローラが前記係合部を構成してガイド用棒状部材に押し付けられる方向に付勢されていることを特徴とする請求項又は記載の温室用フィルム開閉装置を提供する。
請求項記載の本発明では、前記巻き取り軸のうち、前記付勢手段によって前記係合部と共にガイド用棒状部材に押し付けられる部位に、巻き取り軸の外面よりも摩擦抵抗の高い素材からなる筒部材が装着されていることを特徴とする請求項1〜のいずれか1に記載の温室用フィルム開閉装置を提供する。
請求項記載の本発明では、前記筒部材の外径が、巻き取り軸の移動範囲において、温室用フィルムを巻き取った際の温室用フィルムを含む巻き取り軸の実質上の最大外径と、温室用フィルムを巻き戻した際の実質上の最小外径との間の略中間の値に設定されていることを特徴とする請求項記載の温室用フィルム開閉装置を提供する。
請求項記載の本発明では、前記筒部材が、―方の端部から他方の端部までの間で外径差を有する形状に形成されていることを特徴とする請求項記載の温室用フィルム開閉装置を提供する。
請求項記載の本発明では、前記筒部材は、―方の端部から他方の端部に向かって外径が大きくなるテーパ状に形成されていることを特徴とする請求項記載の温室用フィルム開閉装置を提供する。
請求項記載の本発明では、前記筒部材は、少なくともいずれか―方の端部と略中心部との間で外径差を有する形状に形成されていることを特徴とする請求項記載の温室用フィルム開閉装置を提供する。
請求項10記載の本発明では、前記筒部材は、略中心部の外径が小さく、各端部の外径が大きい形状に形成されていることを特徴とする請求項記載の温室用フィルム開閉装置を提供する。
【0008】
【発明の実施の形態】
以下、図面に示した実施形態に基づき本発明をさらに詳細に説明する。図1は、本発明の一の実施形態にかかる温室用フィルム開閉装置1を示す概略斜視図である。
【0009】
本実施形態の温室用フィルム開閉装置1は、駆動部10、移動機構20及び巻き取り軸30を有して構成される。駆動部10は、駆動源となるモータ11と、該モータ11を支持すると共に、内部にモータ11の回転駆動力を伝達するギア機構(図示せず)等が内蔵されたケーシング12とを備えて構成される。ケーシング12は、モータ11の下部に位置する前部フレーム121とその後方に突出させた後部フレーム122とを備えてなる。ケーシング12の前部フレーム121には、巻き取り軸30が該前部フレーム121を厚み方向に貫通するように配設され、上記したギア機構を介して該巻き取り軸30を正転又は逆転方向に回転可能に支持している。また、モータ11を駆動させる操作スイッチ13が該前部フレーム121に設けられている。なお、前部フレーム121の左右に、モータ11によって回転する出力軸(図示せず)を突出させ、該出力軸に対し、すなわち、ケーシング12の外部において、巻き取り軸30を連結する場合もあるが、かかる場合には、本明細書においては、該出力軸も巻き取り軸に含めて取り扱うものとする。
【0010】
移動機構20は、駆動部10に付設される。この移動機構20は、本実施形態において付勢手段を構成する弾性部材としてのバネ材21と、係合部としてのガイドローラ22,23とを備えて構成される。バネ材21は、外側に位置する2つの直線部からなる一対のバネ部211,212と、この直線部からなる各バネ部211,212同士を連結する略U字状の中間部213とを備え、全体として略M字状に屈曲形成されている。そして、各バネ部211,212と中間部213との各交差部214,215が、ケーシング12の後部フレーム122の側面にボルト123によって固定される。これにより、各交差部214,215がケーシング12に連結される各バネ部211,212の基端を構成し、各バネ部211,212は、地面に立設するなどして配置したガイド用棒状部材50に沿って上下方向に離間して位置することになる。
【0011】
上記した一対のバネ部211,212は、各他端216,217が拡開する方向に付勢される弾性を備えていると共に、各他端216,217が、後部フレーム122の位置するガイド用棒状部材50の一方側から他方側に至るまで延びる長さを有している。また、各他端216,217は、ガイド用棒状部材50の側方を通過した後、他方側においてガイド用棒状部材50に近接する方向に屈曲されており、屈曲された各他端216,217にガイド用棒状部材50に係合する係合部を構成するガイドローラ22,23が支持されている。係合部としては、バネ部211,212の各他端216,217を、例えば略円弧状に形成して、ガイド用棒状部材50に直接接触させることも可能であるが、この場合には、駆動部10が移動する際の摺動抵抗が大きくなるため、本実施形態のようにガイドローラ22,23を配設して係合部を構成する方が、より滑らかな動作を実現するために好ましい。
【0012】
一方、ケーシング12の前部フレーム121を左右に貫通して配設された巻き取り軸30は、ガイド用棒状部材50の一方側に位置するように設けられる。この結果、上記した係合部を構成するガイドローラ22,23は、ガイド用棒状部材50を挟んで、平面視で、巻き取り軸30の略反対側に位置することになる。そして、かかるガイドローラ22,23は、一対のバネ部211,212の各他端216,217に支持されていることにより、基端となっている各交差部214,215を中心として互いに広がる方向に付勢されているため、ガイド用棒状部材50の他方側に対して常に押し付けられている。一対のバネ部211,212がこのように他端216,217を拡開させる方向に付勢する弾性を有しているということは、ガイドローラ22,23を上記のようにガイド用棒状部材50に他方側から押し付ける一方で、ガイド用棒状部材50を挟んで反対側に位置する巻き取り軸30をガイド用棒状部材50に一方側から押し付けることになる。すなわち、一対のバネ部211,212は、ガイド用棒状部材50を挟んで一方側と他方側に位置する巻き取り軸30とガイドローラ22,23とを、共にガイド用棒状部材50に押し付ける方向に付勢する機能を有する。
なお、係合部を構成するガイドローラ22,23は、必ずしも、平面視で巻き取り軸30の略反対側に配置されていなくてもよく、ガイド用棒状部材50の側方に偏った位置に設け、ガイド用棒状部材50を斜めに挟む位置関係で設けてもよい。また、例えば、ガイドローラ22,23として、それぞれ略そろばん玉状のローラ部材(図示せず)を2個ずつ用い、各そろばん玉状のローラ部材をガイド用棒状部材50の側方に偏った位置で接するように設けることもできる。いずれにしても、巻き取り軸30と、ガイドローラ22,23などから構成される係合部とによって、略反対方向からあるいは斜めに、ガイド用棒状部材50を挟むことが可能な位置関係で設けられればよい。但し、略反対方向から挟むような位置関係で設けることにより、ガイドローラ22,23と巻き取り軸30とを、より簡易な構成でかつ確実にガイド用棒状部材50に押し付けることができる。
【0013】
上記したように、移動機構20は、バネ材21と、ガイドローラ22,23と、バネ材21によりガイドローラ22,23と共にガイド用棒状部材50に圧接される巻き取り軸30の一部とから構成してもよいが、巻き取り軸30のうち、ガイド用棒状部材50に圧接される部位には、ゴムやウレタン材等から構成され、巻き取り軸30と共に回転する筒部材24を装着することが好ましい。巻き取り軸30は、通常、金属製のパイプから形成されるため、ゴムやウレタン材等から構成される筒部材24を用いることにより、ガイド用棒状部材50との間の摩擦抵抗を、巻き取り軸30を直接接触させる場合よりも高めることができる。駆動部10から巻き取り軸30に回転力が伝達された際に、上記したバネ材21の弾性力により、筒部材24がガイドローラ22,23と共にガイド用棒状部材50に押し付けられながら上下動するが、その際、ガイド用棒状部材50に対して確実に密接できるため、駆動部10の自重をより確実に支持でき、温室用フィルムの負荷の低減効果が大きい。
【0014】
筒部材24は、図1及び図2(a)に示したように、外径が長手方向一方の端部から他方の端部までほぼ同じ円筒状に形成してもよいが、この場合の外径は、巻き取り軸30の移動範囲において、温室用フィルムを最も巻き取った際の温室用フィルムを含む巻き取り軸30の実質上の外径(温室用フィルムを巻き付けている場合の最も外側の径)と、最も巻き戻した際の実質上の外径との間の略中間の値に設定することが好ましい。温室用フィルムを含んだ巻き取り軸30の実質上の外径は、温室用フィルムを巻き戻した際と巻き取った際とでは、巻き取り量に応じて変化し、温室用フィルムを巻き取っていくに従って実質上の外径が太くなると、巻き取り軸30の移動速度(上下動速度)が増し、巻き戻していくに従って実質上の外径が細くなると移動速度が低下していく。これに対し、上記した移動機構20を介して上下動する駆動部10は、巻き取り軸30の移動速度の変化の影響を受けないとすれば、ほぼ一定の速度で移動しようとする。従って、両者間には、温室用フィルムの巻き取り量により移動速度にずれが生じるが、上記のように、筒部材24の外径を巻き取り軸30の実質上の外径の最大時と最小時との略中間に設定することで、巻き取り軸30と駆動部10との移動速度のずれが、いずれか一方に移動した際に偏って大きくなることを防止でき、移動速度のずれに伴う巻き取り軸30の蛇行を抑制することができる。
【0015】
筒部材24は、外径が一方の端部から他方の端部までほぼ同じである場合には、上記のような巻き取り軸30の実質上の外径の最大時と最小時との略中間の外径に設定することが好ましいが、一方の端部から他方の端部までの間で外径差を有する形状に形成することが、巻き取り軸30と駆動部10との移動速度のずれを抑制する上で、より好ましい。また、そのうち、最も細い部位の外径が、巻き取り軸30の実質上の外径の最小時に近く、最も太い部位の外径が、巻き取り軸30の実質上の外径の最大時に近いことが、さらに好ましい。
【0016】
筒部材24に外径差を設ける場合の形状としては、例えば、図2(b)に示したように、一方の端部24aから他方の端部24bに向かって順次外径が大きくなるテーパ状に形成することができる。また、少なくともいずれか一方の端部と略中心部との間で外径差を備えた形状とすることもでき、例えば、図2(c)に示したように、略中心部24cの外径が小さく、各端部24a,24bの外径が大きい形状とすることができる。
【0017】
このような外径差を設けることにより、例えば、図2(c)に示した筒部材24を用いると、温室用フィルムを巻き戻す際には、図3(a)に示したように、巻き取り軸30の実質上の外径が細くなるに従って、筒部材24とガイド用棒状部材50との接点が、外径の細い略中心部24cへと移動する。巻き取る際には、図3(b)に示したように、筒部材24とガイド用棒状部材50との接点が、巻き取り軸30の実質上の外径が太くなるに従って、筒部材24のうち外径の大きいいずれかの端部24bへと移動する。これにより、巻き取り軸30の移動速度と駆動部10の移動速度とのずれをより小さくできる。
【0018】
本実施形態の温室用フィルム開閉装置1は、例えば、温室の妻面付近に立設したガイド用棒状部材50に対し、巻き取り軸30に装着した筒部材24とガイドローラ22,23とが、該ガイド用棒状部材50を挟んで略反対側に位置するように配設する。巻き取り軸30には、例えば、温室の側面を開閉する温室用フィルムの端部を巻き付け固定しておく。温室用フィルムを巻き取る際には、操作スイッチ13を操作して駆動部10のモータ11を一方向に回転駆動させる。駆動部10は、移動機構20を構成する筒部材24とガイドローラ22,23とがガイド用棒状部材50に互いに略反対方向から密接しているため、自転せずに、巻き取り軸30を巻き取り方向に回転させ、温室用フィルムを順次巻き取り、温室の側面に設けた換気部を開放していく。
【0019】
温室用フィルムが巻き取られると、巻き取り軸30がそれに伴って上昇するため、移動機構20を構成する筒部材24とガイドローラ22,23とがガイド用棒状部材50に沿って上方向に移動する。この際、本実施形態によれば、バネ材21の一対のバネ部211,212の弾性力によって、筒部材24とガイドローラ22,23とを互いに反対方向からガイド用棒状部材50に押し付ける面圧を発生させるため、駆動部10は移動機構20を介してガイド用棒状部材50に沿って自走することになり、駆動部10の荷重が該移動機構20及びガイド用棒状部材50によって分担される。このため、温室用フィルムによって分担すべき駆動部10の荷重負担が軽減され、負荷が小さくなり、温室用フィルムの破損や伸びを抑制することができる。
【0020】
また、筒部材24として、上記したように、巻き取り軸30の実質上の外径の最大時と最小時との略中間の外径に設定されたものや、一方の端部と他方の端部との間で外径差を有するものを用いることにより、巻き上げ時に巻き取り軸30の実質上の外径が太くなることによる駆動部10の移動の遅れを抑え、それに伴う巻き取り軸30の蛇行を抑制でき、さらに、巻き取り軸30の蛇行に伴って温室用フィルムに無理な力が加わることを抑制することができる。
【0021】
一方、温室の側面に形成した換気部を閉鎖する際には、操作スイッチ13を操作して、駆動部10のモータ11を上記と逆方向に回転駆動させる。これにより、巻き取り軸30が上記と逆に回転し、温室用フィルムを巻き戻していく。この場合も、移動機構20を構成する筒部材24とガイドローラ22,23とが一対のバネ部211,212の弾性によってガイド用棒状部材50に互いに略反対方向から圧接されるため、駆動部10の荷重が分担され、温室用フィルムの負荷となる駆動部10の荷重負担が軽減される。
【0022】
温室用フィルムの開閉動作の中途において、あるいは、上死点又は下死点において、駆動部10の駆動を停止した場合、従来であれば、駆動部10の荷重がそのまま温室用フィルムの負荷となっていたが、本実施形態によれば、その場合でも、筒部材24とガイドローラ22,23とを互いに反対方向からガイド用棒状部材50に押し付ける面圧が発生するため、その摩擦抵抗によって駆動部10の荷重を分担支持でき、温室用フィルムに加わる負荷を軽減することができる。
【0023】
なお、本発明の温室用フィルム開閉装置は、上記した実施形態に限定されるものではない。上記した実施形態では、係合部であるガイドローラ22,23をガイド用棒状部材50に押圧する弾性部材として、略M字状のバネ材21を用いているが、ガイドローラ22,23を拡開方向に付勢してガイド用棒状部材50に対し、巻き取り軸30と略反対方向から押し付けられる一対のバネ部を備えていればよい。従って、一対のバネ部をそれぞれ別々のバネ材から構成することもできる。但し、上記のように略M字状の1本のバネ材21を用いれば、ガイドローラ22,23を拡開方向に付勢する一対のバネ部を容易に形成することができる。また、図1においては、駆動部10をガイド用棒状部材50の右側に、すなわち温室用フィルムが配設されている側に設け、バネ材21、ガイドローラ22,23及び筒部材24から構成される移動機構20を、駆動部10の左側に設けているが、ガイド用棒状部材50の設置場所や温室との距離等を考慮して、駆動部10をガイド用棒状部材50の左側に位置させ、バネ材21をケーシング12の右側の側面に取り付けるなどして、移動機構20を駆動部10の右側に配設する構成とすることもできる。
【0024】
また、係合部を構成するガイドローラ22,23をガイド用棒状部材50に押し付ける付勢手段としては、上記した弾性部材に代えて、図4に示したような構造のものを用いることもできる。図4に示した付勢手段は、駆動部10のケーシング12に連結される取り付けフレーム60と、この取り付けフレーム60に支持される係合部可動部材としてのネジ部材70とを備えて構成される。
【0025】
取り付けフレーム60は、ケーシング12の前部フレーム121から前方に突出し、ガイド用棒状部材50を挟んで巻き取り軸30の略反対側に至った後、折り曲げられた折り曲げ板部61を備えている。この折り曲げ板部61に、係合用可動部材としてのネジ部材70を支持させ、該ネジ部材70を、ガイドローラ22,23を回転可能に保持する保持フレーム(図示せず)に当接又は連結している。これにより、ネジ部材70を締め込むことにより、ガイドローラ22,23をガイド用棒状部材50に近接させ、押し付けることができる。このようにして、ガイドローラ22,23をガイド用棒状部材50に押し付けると、巻き取り軸30に装着された筒部材24と該ガイドローラ22,23との距離が短くなるため、筒部材24も、ガイド用棒状部材50に押し付けられることになる。従って、ネジ部材70の締め付け量を調整することによって、筒部材24(巻き取り軸30)及びガイドローラ22,23を、適宜の押し付け力で、ガイド用棒状部材50に押し付けることができ、図1に示した実施形態と同様に、駆動部10の荷重を分担支持することができる。
【0026】
なお、係合部可動部材としては、図4に示したネジ部材70に代えて、コイルスプリング等のバネ部材やゴムなどの弾性部材を折り曲げ板部61とガイドローラ22,23との間に配設して、ガイドローラ22,23を付勢することもできる。また、ネジ部材70の周囲にコイルスプリングを設けるなどして、ネジ部材70と弾性部材とを併用することもできる。いずれにしても、付勢手段としては、ガイドローラ22,23等からなる係合部をガイド用棒状部材50に押し付けることができるものであれば、どのようなものであってもよい。但し、より簡易にかつ安価に製作できる点で、図1に示したような一対のバネ部211,212を備えた弾性部材を用いることが好ましい。
【0027】
また、上記実施形態では、駆動部10としてモータ11を具備した電動式のものを示しているが、特許文献2に開示されたような手動式のハンドルを備えた駆動部を有するものであっても、本発明を適用可能であることはもちろんである。また、上記した説明では温室の側部に設けられる換気用の温室用フィルムを開閉する場合について説明しているが、連棟式の温室における谷部の換気を行うための温室用フィルムやその他のフィルムであって、駆動部をガイド用棒状部材に案内させて巻き取り軸によって巻き取り又は巻き戻しする装置であれば、本発明を適用することができる。また、ガイド用棒状部材としては、図1に示したような断面略円形のパイプ材が一般的であるが、断面形状が略角形、略H字状のものであっても本発明を適用可能である。
【0028】
【発明の効果】
本発明の温室用フィルム開閉装置は、付勢手段によって、巻き取り軸と共にガイド用棒状部材に押し付けられる方向に付勢される係合部を有する移動機構が、駆動部に付設されている。従って、駆動部の荷重をガイド用棒状部材に押圧される係合部と巻き取り軸との抵抗により分担支持することができ、温室用フィルムの負荷を低減することができ、温室用フィルムの破損や伸びを抑制することができる。しかも、ガイド用棒状部材に、付勢手段によって、巻き取り軸と共に押し付けられる係合部を備えていればよく、極めて簡易な構造で、安価に提供することができる。また、付勢手段によって、係合部と共に、ガイド用棒状部材に押し付けられる筒部材を巻き取り軸に装着すると共に、その外径を所定の外径に設定し、あるいは、該筒部材に外径差を設けることにより、駆動部の移動速度と巻き取り軸の移動速度とのずれを小さくでき、巻き取り軸の蛇行を抑制し、それによって生じる温室用フィルムの破損や伸びを抑制することができる。
【図面の簡単な説明】
【図1】図1は、本発明の一の実施形態にかかる温室用フィルム開閉装置を示す概略斜視図である。
【図2】図2(a)〜(c)は、巻き取り軸に装着される筒部材の具体例を示す図である。
【図3】図3(a)〜(b)は、図2(c)で示した筒部材の作用を説明するための図である。
【図4】図4は、他の例に係る付勢手段を取り付けた温室用フイルム開閉装置の実施形態を示す概略斜視図である。
【符号の説明】
1 温室用フイルム開閉装置
10 駆動部
11 フレーム
12 ケーシング
121 前部フレーム
122 後部フレーム
20 移動機構
21 バネ材
211,212 バネ部
213 中間部
22,23 ガイドローラ
24 筒部材
30 巻き取り軸
50 ガイド用棒状部材
60 取り付けフレーム
70 ネジ部材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a greenhouse film opening and closing device for winding and unwinding and opening and closing a greenhouse film that is disposed on a side surface or a valley of a greenhouse and that is opened and closed for ventilation.
[0002]
[Prior art]
For example, as a device for opening and closing a wind-up type greenhouse film provided for ventilation on the side of a greenhouse, a winding shaft fixed to an end or an intermediate part of the greenhouse film is manually rotated using a handle. There are devices and devices that rotate using a motor. However, in any case, in order to transmit the rotation of the drive unit to the take-up shaft, these devices need a detent means for preventing the drive unit from rotating. As the rotation preventing means, as shown in Patent Documents 1 to 3, for example, a guide bar member standing on the ground and moving up and down along the peripheral surface of the guide bar member, A movement mechanism having wheels is attached to a drive unit. When the guide roller and the wheel constituting the moving mechanism come into contact with the guide rod-shaped member, the rotation of the drive unit is prevented, and the rotational force of the drive unit is transmitted to the winding shaft. When such a moving mechanism is used, the drive unit moves up and down along the guide rod-shaped member together with the take-up shaft in accordance with the amount of the greenhouse film taken up onto the take-up shaft.
[0003]
[Patent Document 1]
JP 2001-128563 A
[Patent Document 2]
Japanese Utility Model Publication No. 5-91297
[Patent Document 3]
Japanese Utility Model Publication No. 6-6696
[0004]
[Problems to be solved by the invention]
In the devices disclosed in Patent Documents 1 to 3, as described above, the drive unit having the moving mechanism moves up and down along the guide rod-shaped member together with the take-up shaft. It is pulled up and down by a greenhouse film wound around. For this reason, especially in the site | part close | similar to the drive part side among the films for greenhouses, it is easy to generate | occur | produce the breakage and elongation accompanying the weight of a drive part. In Patent Document 1, a DC motor is used as a motor constituting the drive unit to reduce the weight of the drive unit and reduce the damage and elongation of the greenhouse film. However, the weight of the drive unit is still in the greenhouse. There is no change in the point which becomes the load of the film. In Patent Document 3, the weight of the drive unit is offset by disposing the weight member for balance, and the load applied to the greenhouse film is reduced. However, when the weight member is disposed, the driving is performed. The structure is complicated and the manufacturing cost is high, for example, a wire connecting the portion and the weight member and a pulley around which the wire is wound must be provided on the guide rod-like member.
[0005]
Further, for example, when a greenhouse film is wound around a winding shaft, the substantial outer diameter in a state where the greenhouse film is wound is increased by an integral amount of the film thickness. For this reason, the moving speed of the winding shaft increases as the substantial outer diameter increases. On the other hand, if the drive unit is not affected by the moving speed of the take-up shaft, it tries to move along the guide bar-like member at a constant speed. Therefore, there is a deviation between the moving speed of the take-up shaft due to winding or rewinding the greenhouse film and the moving speed of the drive unit, and this deviation causes the take-up shaft to meander and cause the greenhouse film to move. This is one of the causes of excessive force.
[0006]
The present invention has been made in view of the above, and is applied to the load of the drive unit applied to the greenhouse film regardless of the type of the drive unit, which is manual, electric, or a DC motor or an AC motor. It is an object of the present invention to provide a greenhouse film opening / closing device that can reduce the accompanying load and suppress damage and elongation of the greenhouse film. Another object of the present invention is to provide a greenhouse film opening / closing device that can reduce the load on the greenhouse film accompanying the load of the drive unit with a simple structure. Another object of the present invention is to provide a greenhouse film opening / closing device that can reduce the deviation between the moving speed of the drive unit and the moving speed of the take-up shaft and suppress meandering of the take-up shaft.
[0007]
[Means for Solving the Problems]
  In order to solve the above-described problem, the present invention according to claim 1 is a greenhouse film opening and closing device provided with a drive unit that rotates a winding shaft that winds or unwinds a greenhouse film and opens and closes it.
  The drive unit includes a moving mechanism that can move along the guide rod-shaped member;
  The moving mechanism has an engaging portion that is urged by the urging means in a direction in which the moving mechanism is pressed against the guide rod-shaped member together with the winding shaft.,
  The engaging portion is provided in a positional relationship that sandwiches the guide rod-shaped member with the take-up shaft, and the urging means presses the engaging portion against the guide rod-shaped member together with the take-up shaft. The base end is connected to the casing of the drive unit, and the other end is normally urged toward each other in the spreading direction--consisting of an elastic member having a pair of spring portionsA greenhouse film opening and closing device is provided.
  Claim2In the present invention described above, the elastic member is made of a spring material bent in a substantially M shape, and the pair of spring portions are formed by the straight portions positioned on the outside, and the intermediate portions connecting the straight portions to each other. The intersection part of a part and each linear part is connected with the casing of the said drive part as the said base end.1A greenhouse film opening and closing device as described.
  Claim3In the present invention described above, each of the other ends of the pair of spring portions is bent so as to be positioned on the substantially opposite side of the take-up shaft across the guide bar-shaped member and is pressed in the direction pressed against the guide bar-shaped member. The urging is performed, and each of the other ends constitutes the engaging portion.1Or2A greenhouse film opening and closing device as described.
  Claim4In the present invention described above, a guide roller is provided at each other end of the pair of spring portions on the opposite side of the take-up shaft with the guide rod-shaped member interposed therebetween, and the guide roller includes the engaging portion. It is comprised and is urged | biased in the direction pressed on the rod-shaped member for guides.1Or2A greenhouse film opening and closing device as described.
  Claim5In the present invention described above, a cylindrical member made of a material having a higher frictional resistance than the outer surface of the take-up shaft is placed on a portion of the take-up shaft that is pressed against the guide rod-shaped member together with the engaging portion by the biasing means. It is mounted | worn with Claim 1 characterized by the above-mentioned4A greenhouse film opening / closing device according to any one of the above.
  Claim6In the present invention described above, the outer diameter of the cylindrical member is substantially the maximum outer diameter of the take-up shaft including the greenhouse film when the greenhouse film is taken up in the moving range of the take-up shaft; It is set to a substantially intermediate value between the substantially minimum outer diameter when the film is rewound.5A greenhouse film opening and closing device as described.
  Claim7In the present invention described above, the cylindrical member is formed in a shape having a difference in outer diameter from one end to the other end.5A greenhouse film opening and closing device as described.
  Claim8In the present invention described above, the cylindrical member is formed in a tapered shape having an outer diameter that increases from one end to the other end.7A greenhouse film opening and closing device as described.
  Claim9In the present invention described above, the cylindrical member is formed in a shape having an outer diameter difference between at least one of the end portion and the substantially central portion.5A greenhouse film opening and closing device as described.
  Claim10In the present invention described above, the cylindrical member is formed in a shape having a small outer diameter at a substantially central portion and a large outer diameter at each end portion.9A greenhouse film opening and closing device as described.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG. 1 is a schematic perspective view showing a greenhouse film opening / closing device 1 according to an embodiment of the present invention.
[0009]
The greenhouse film opening / closing device 1 according to this embodiment includes a drive unit 10, a moving mechanism 20, and a winding shaft 30. The drive unit 10 includes a motor 11 serving as a drive source, and a casing 12 that supports the motor 11 and incorporates a gear mechanism (not shown) that transmits a rotational driving force of the motor 11 therein. Composed. The casing 12 includes a front frame 121 positioned at the lower portion of the motor 11 and a rear frame 122 protruding rearward thereof. A winding shaft 30 is disposed on the front frame 121 of the casing 12 so as to penetrate the front frame 121 in the thickness direction, and the winding shaft 30 is rotated in the forward or reverse direction via the gear mechanism described above. It is rotatably supported. An operation switch 13 for driving the motor 11 is provided on the front frame 121. An output shaft (not shown) that is rotated by the motor 11 protrudes from the left and right of the front frame 121, and the winding shaft 30 may be connected to the output shaft, that is, outside the casing 12. In this case, however, in this specification, the output shaft is also included in the take-up shaft.
[0010]
The moving mechanism 20 is attached to the driving unit 10. The moving mechanism 20 includes a spring material 21 as an elastic member that constitutes an urging unit in the present embodiment, and guide rollers 22 and 23 as engaging portions. The spring material 21 includes a pair of spring portions 211 and 212 composed of two straight portions positioned on the outside, and a substantially U-shaped intermediate portion 213 that connects the spring portions 211 and 212 composed of the straight portions. The whole is bent in a substantially M shape. The intersecting portions 214 and 215 of the spring portions 211 and 212 and the intermediate portion 213 are fixed to the side surface of the rear frame 122 of the casing 12 by bolts 123. As a result, the intersecting portions 214 and 215 constitute the base ends of the spring portions 211 and 212 connected to the casing 12, and the spring portions 211 and 212 are arranged as guide rods such as standing on the ground. It will be spaced apart along the member 50 in the up-down direction.
[0011]
The pair of spring portions 211 and 212 described above have elasticity that is biased in the direction in which the other ends 216 and 217 expand, and the other ends 216 and 217 are for guides where the rear frame 122 is located. The rod member 50 has a length extending from one side to the other side. The other ends 216 and 217 pass through the side of the guide bar-shaped member 50 and are bent in the direction approaching the guide bar-shaped member 50 on the other side. The bent other ends 216 and 217 are bent. Further, guide rollers 22 and 23 constituting an engaging portion that engages with the guide rod-shaped member 50 are supported. As the engaging portion, the other ends 216 and 217 of the spring portions 211 and 212 can be formed in a substantially arc shape, for example, and brought into direct contact with the guide rod-shaped member 50. In this case, Since the sliding resistance when the drive unit 10 moves increases, it is possible to realize a smoother operation when the guide rollers 22 and 23 are provided and the engaging unit is configured as in the present embodiment. preferable.
[0012]
On the other hand, the winding shaft 30 disposed through the front frame 121 of the casing 12 from side to side is provided so as to be positioned on one side of the guide bar-shaped member 50. As a result, the guide rollers 22 and 23 constituting the engaging portion are positioned on the substantially opposite side of the winding shaft 30 in plan view with the guide rod-shaped member 50 interposed therebetween. The guide rollers 22 and 23 are supported by the other ends 216 and 217 of the pair of spring portions 211 and 212, so that the guide rollers 22 and 23 spread in the center with respect to the intersecting portions 214 and 215 serving as the base ends. Therefore, it is always pressed against the other side of the guide bar-shaped member 50. The pair of spring portions 211 and 212 has elasticity that urges the other ends 216 and 217 in such a manner as to expand the other ends 216 and 217 as described above. On the other hand, the winding shaft 30 located on the opposite side across the guide bar-shaped member 50 is pressed against the guide bar-shaped member 50 from one side. That is, the pair of spring portions 211 and 212 are arranged in a direction in which the winding shaft 30 and the guide rollers 22 and 23 positioned on one side and the other side are pressed against the guide rod-shaped member 50 with the guide rod-shaped member 50 interposed therebetween. Has the function of energizing.
The guide rollers 22 and 23 constituting the engaging portion are not necessarily arranged on the substantially opposite side of the take-up shaft 30 in a plan view, and are located at a position biased to the side of the guide bar-shaped member 50. The guide rod-shaped member 50 may be provided in a positional relationship sandwiched obliquely. Further, for example, as the guide rollers 22 and 23, two substantially abacus ball-shaped roller members (not shown) are used, and each abacus ball-shaped roller member is offset to the side of the guide rod-shaped member 50. It can also be provided so that it touches. In any case, the guide rod-shaped member 50 can be sandwiched between the winding shaft 30 and the engaging portion composed of the guide rollers 22 and 23 in a substantially opposite direction or obliquely. It only has to be done. However, the guide rollers 22 and 23 and the take-up shaft 30 can be reliably pressed against the guide rod-shaped member 50 with a simpler configuration by providing the positions so as to be sandwiched from substantially opposite directions.
[0013]
As described above, the moving mechanism 20 includes the spring material 21, the guide rollers 22 and 23, and a part of the take-up shaft 30 that is pressed against the guide rod-shaped member 50 together with the guide rollers 22 and 23 by the spring material 21. Although it may be configured, a cylindrical member 24 made of rubber or urethane material and rotating together with the winding shaft 30 is attached to a portion of the winding shaft 30 that is pressed against the guide rod-shaped member 50. Is preferred. Since the take-up shaft 30 is usually formed from a metal pipe, by using the cylindrical member 24 made of rubber, urethane material, or the like, the frictional resistance between the take-up shaft 30 and the guide rod-like member 50 is taken up. This can be higher than when the shaft 30 is in direct contact. When a rotational force is transmitted from the drive unit 10 to the winding shaft 30, the cylindrical member 24 moves up and down while being pressed against the guide bar member 50 together with the guide rollers 22 and 23 by the elastic force of the spring material 21 described above. In this case, however, the guide bar-like member 50 can be reliably brought into close contact with each other, so that the weight of the drive unit 10 can be more reliably supported, and the effect of reducing the load on the greenhouse film is great.
[0014]
As shown in FIG. 1 and FIG. 2 (a), the cylindrical member 24 may be formed in the same cylindrical shape with the outer diameter extending from one end to the other end in the longitudinal direction. The diameter is a substantially outer diameter of the take-up shaft 30 including the greenhouse film when the greenhouse film is most taken up in the moving range of the take-up shaft 30 (the outermost side when the greenhouse film is wound). (Diameter) and a substantially intermediate value between the outermost diameter at the time of most rewinding. The substantial outer diameter of the take-up shaft 30 including the greenhouse film varies depending on the amount of winding when the greenhouse film is rewound and when it is wound. As the actual outer diameter increases, the moving speed (vertical movement speed) of the winding shaft 30 increases, and as the actual outer diameter decreases, the moving speed decreases. On the other hand, the drive unit 10 that moves up and down via the moving mechanism 20 attempts to move at a substantially constant speed if it is not affected by the change in the moving speed of the winding shaft 30. Therefore, there is a shift in the moving speed between the two depending on the amount of the greenhouse film wound up. However, as described above, the outer diameter of the cylindrical member 24 is the maximum and the maximum of the substantial outer diameter of the winding shaft 30. By setting it approximately in the middle of the time, it is possible to prevent the shift of the moving speed of the winding shaft 30 and the drive unit 10 from being biased and increased when moving to either one, and accompanying the shift of the moving speed The meandering of the winding shaft 30 can be suppressed.
[0015]
When the outer diameter is substantially the same from one end to the other end, the cylindrical member 24 is substantially intermediate between the maximum and minimum actual outer diameters of the winding shaft 30 as described above. Although it is preferable to set the outer diameter of the winding shaft 30 and the driving unit 10 to have a shape having a difference in outer diameter between one end and the other end, It is more preferable for suppressing the above. Of these, the outer diameter of the thinnest part is close to the minimum of the actual outer diameter of the take-up shaft 30, and the outer diameter of the thickest part is close to the maximum of the actual outer diameter of the take-up shaft 30. Is more preferable.
[0016]
For example, as shown in FIG. 2B, the cylindrical member 24 has a tapered shape in which the outer diameter gradually increases from one end 24a to the other end 24b. Can be formed. Moreover, it can also be set as the shape provided with the outer diameter difference between at least any one edge part and a substantially center part, for example, as shown in FIG.2 (c), the outer diameter of the substantially center part 24c. The end portions 24a and 24b can have a large outer diameter.
[0017]
By providing such an outer diameter difference, for example, when the cylindrical member 24 shown in FIG. 2 (c) is used, when the greenhouse film is rewound, as shown in FIG. As the substantial outer diameter of the take-up shaft 30 becomes thinner, the contact point between the cylindrical member 24 and the guide rod-shaped member 50 moves to the substantially central portion 24c having a smaller outer diameter. At the time of winding, as shown in FIG. 3B, the contact between the cylindrical member 24 and the guide rod-shaped member 50 is increased as the substantial outer diameter of the winding shaft 30 increases. Of these, it moves to one of the end portions 24b having a large outer diameter. Thereby, the shift | offset | difference of the moving speed of the winding shaft 30 and the moving speed of the drive part 10 can be made smaller.
[0018]
The greenhouse film opening / closing device 1 of the present embodiment includes, for example, a cylindrical member 24 mounted on the take-up shaft 30 and guide rollers 22 and 23 with respect to a guide rod-shaped member 50 erected in the vicinity of the wife's face of the greenhouse. It arrange | positions so that it may be located in the other side on both sides of this rod member 50 for guides. For example, an end portion of a greenhouse film that opens and closes the side surface of the greenhouse is wound and fixed on the winding shaft 30. When winding the greenhouse film, the operation switch 13 is operated to rotate the motor 11 of the drive unit 10 in one direction. Since the cylindrical member 24 and the guide rollers 22 and 23 constituting the moving mechanism 20 are in close contact with the guide rod-shaped member 50 from substantially opposite directions, the drive unit 10 does not rotate and winds the winding shaft 30. Rotate in the take-up direction, wind up the film for the greenhouse sequentially, and open the ventilation section provided on the side of the greenhouse.
[0019]
When the greenhouse film is taken up, the take-up shaft 30 rises accordingly, so that the cylindrical member 24 and the guide rollers 22 and 23 constituting the moving mechanism 20 move upward along the guide bar-like member 50. To do. At this time, according to the present embodiment, the surface pressure that presses the cylindrical member 24 and the guide rollers 22 and 23 against the guide rod-shaped member 50 from opposite directions by the elastic force of the pair of spring portions 211 and 212 of the spring material 21. Therefore, the drive unit 10 self-travels along the guide bar-shaped member 50 via the moving mechanism 20, and the load of the drive unit 10 is shared by the moving mechanism 20 and the guide bar-shaped member 50. . For this reason, the load burden of the drive part 10 which should be shared by the film for greenhouses is reduced, a load becomes small, and the damage and elongation of the film for greenhouses can be suppressed.
[0020]
Further, as described above, the cylindrical member 24 is set to have an outer diameter that is substantially intermediate between the maximum and minimum actual outer diameters of the winding shaft 30, or one end and the other end. By using one having an outer diameter difference with the part, a delay in movement of the drive unit 10 due to the substantial outer diameter of the winding shaft 30 becoming thicker during winding is suppressed, and the accompanying winding shaft 30 The meandering can be suppressed, and furthermore, an unreasonable force can be suppressed from being applied to the greenhouse film as the winding shaft 30 meanders.
[0021]
On the other hand, when closing the ventilation part formed in the side surface of a greenhouse, the operation switch 13 is operated and the motor 11 of the drive part 10 is rotationally driven in the reverse direction. As a result, the take-up shaft 30 rotates in the reverse direction to rewind the greenhouse film. Also in this case, since the cylindrical member 24 and the guide rollers 22 and 23 constituting the moving mechanism 20 are pressed against the guide bar-shaped member 50 from substantially opposite directions by the elasticity of the pair of spring portions 211 and 212, the driving unit 10. The load of the drive unit 10 serving as a greenhouse film load is reduced.
[0022]
When driving of the driving unit 10 is stopped during the opening / closing operation of the greenhouse film or at the top dead center or the bottom dead center, conventionally, the load of the driving unit 10 becomes the load of the greenhouse film as it is. However, according to the present embodiment, even in such a case, a surface pressure is generated that presses the cylindrical member 24 and the guide rollers 22 and 23 against the guide bar-shaped member 50 from opposite directions. The load of 10 can be shared and supported, and the load applied to the greenhouse film can be reduced.
[0023]
The greenhouse film opening and closing device of the present invention is not limited to the above-described embodiment. In the embodiment described above, the substantially M-shaped spring material 21 is used as the elastic member that presses the guide rollers 22 and 23 that are the engaging portions against the guide rod-shaped member 50, but the guide rollers 22 and 23 are expanded. What is necessary is just to provide a pair of spring part which is urged | biased by the opening direction and is pressed with respect to the rod-shaped member 50 for a guide from the winding shaft 30 from a substantially opposite direction. Therefore, each of the pair of spring portions can be composed of separate spring materials. However, if one spring material 21 having a substantially M shape is used as described above, a pair of spring portions that urge the guide rollers 22 and 23 in the expanding direction can be easily formed. In FIG. 1, the drive unit 10 is provided on the right side of the guide rod-shaped member 50, that is, on the side where the greenhouse film is disposed, and is composed of a spring material 21, guide rollers 22 and 23, and a cylindrical member 24. The moving mechanism 20 is provided on the left side of the drive unit 10, but the drive unit 10 is positioned on the left side of the guide bar-shaped member 50 in consideration of the installation location of the guide bar-shaped member 50, the distance from the greenhouse, and the like. The moving mechanism 20 may be disposed on the right side of the drive unit 10 by attaching the spring material 21 to the right side surface of the casing 12.
[0024]
Further, as an urging means for pressing the guide rollers 22 and 23 constituting the engaging portion against the guide rod-shaped member 50, a structure as shown in FIG. 4 can be used instead of the above-described elastic member. . The urging means shown in FIG. 4 includes an attachment frame 60 connected to the casing 12 of the drive unit 10 and a screw member 70 as an engaging portion movable member supported by the attachment frame 60. .
[0025]
The attachment frame 60 includes a bent plate portion 61 that protrudes forward from the front frame 121 of the casing 12, reaches the substantially opposite side of the take-up shaft 30 with the guide rod-shaped member 50 interposed therebetween, and is bent. A screw member 70 as an engaging movable member is supported on the bent plate portion 61, and the screw member 70 is brought into contact with or connected to a holding frame (not shown) that rotatably holds the guide rollers 22 and 23. ing. Thus, by tightening the screw member 70, the guide rollers 22 and 23 can be brought close to and pressed against the guide bar-shaped member 50. When the guide rollers 22 and 23 are pressed against the guide rod-like member 50 in this way, the distance between the cylindrical member 24 mounted on the take-up shaft 30 and the guide rollers 22 and 23 is shortened. Then, it is pressed against the guide bar-shaped member 50. Therefore, by adjusting the tightening amount of the screw member 70, the cylindrical member 24 (winding shaft 30) and the guide rollers 22 and 23 can be pressed against the guide bar-shaped member 50 with an appropriate pressing force. Similarly to the embodiment shown in Fig. 5, the load of the drive unit 10 can be shared and supported.
[0026]
As the engaging portion movable member, a spring member such as a coil spring or an elastic member such as rubber is arranged between the bent plate portion 61 and the guide rollers 22 and 23 instead of the screw member 70 shown in FIG. It is also possible to urge the guide rollers 22 and 23. Further, the screw member 70 and the elastic member can be used together by providing a coil spring around the screw member 70. In any case, any urging means may be used as long as it can press the engaging portion composed of the guide rollers 22, 23 and the like against the guide rod-shaped member 50. However, it is preferable to use an elastic member provided with a pair of spring portions 211 and 212 as shown in FIG. 1 in that it can be manufactured more easily and inexpensively.
[0027]
In the above embodiment, an electric type equipped with a motor 11 is shown as the drive unit 10, but it has a drive unit equipped with a manual handle as disclosed in Patent Document 2. Of course, the present invention is applicable. In the above description, the case of opening and closing the greenhouse film for ventilation provided on the side of the greenhouse has been described. However, the greenhouse film for ventilating the valleys in the continuous greenhouse and other films The present invention can be applied to any device that is a film and is a device that guides the drive unit to the guide rod-shaped member and winds or rewinds the winding unit using the winding shaft. Further, as the guide rod-like member, a pipe material having a substantially circular cross section as shown in FIG. 1 is generally used, but the present invention can be applied even if the cross-sectional shape is a substantially square shape or a substantially H shape. It is.
[0028]
【The invention's effect】
In the greenhouse film opening and closing device of the present invention, a moving mechanism having an engaging portion that is urged by the urging means in a direction to be pressed against the guide rod-shaped member together with the take-up shaft is attached to the drive unit. Accordingly, the load of the drive unit can be shared and supported by the resistance between the engaging portion pressed by the guide rod-shaped member and the take-up shaft, the load on the greenhouse film can be reduced, and the greenhouse film is damaged. And elongation can be suppressed. Moreover, it is only necessary to provide the guide rod-like member with an engaging portion that is pressed together with the take-up shaft by the urging means, and can be provided at a low cost with a very simple structure. In addition, the urging means attaches the cylindrical member pressed against the guide rod-shaped member together with the engaging portion to the take-up shaft, sets the outer diameter to a predetermined outer diameter, or sets the outer diameter to the cylindrical member. By providing the difference, the deviation between the moving speed of the drive unit and the moving speed of the winding shaft can be reduced, the meandering of the winding shaft can be suppressed, and the damage and elongation of the greenhouse film caused thereby can be suppressed. .
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a greenhouse film opening / closing device according to an embodiment of the present invention.
FIGS. 2A to 2C are diagrams showing a specific example of a cylindrical member mounted on a winding shaft.
FIGS. 3A to 3B are views for explaining the operation of the cylindrical member shown in FIG.
FIG. 4 is a schematic perspective view showing an embodiment of a greenhouse film opening / closing device to which an urging means according to another example is attached.
[Explanation of symbols]
1 Greenhouse film opener
10 Drive unit
11 frames
12 casing
121 Front frame
122 Rear frame
20 Movement mechanism
21 Spring material
211, 212 Spring part
213 Middle part
22, 23 Guide roller
24 Tube member
30 Winding shaft
50 Bar-shaped member for guide
60 Mounting frame
70 Screw member

Claims (10)

温室用フィルムを巻き取り又は巻き戻しして開閉する巻き取り軸を回転させる駆動部を備えた温室用フィルム開閉装置であって、
前記駆動部が、ガイド用棒状部材に沿って移動可能な移動機構を備えており、
該移動機構が、付勢手段によって、前記巻き取り軸と共に前記ガイド用棒状部材に押し付けられる方向に付勢される係合部を有し
前記係合部が、前記巻き取り軸とにより、前記ガイド用棒状部材を挟む位置関係で設けられ、前記付勢手段が、該係合部を前記巻き取り軸と共に前記ガイド用棒状部材に押し付ける方向に付勢するように、基端が前記駆動部のケーシングに連結され、他端が常態において互いに拡開方向に付勢される―対のバネ部を備えた弾性部材からなることを特徴とする温室用フィルム開閉装置。
A greenhouse film opening and closing device comprising a drive unit for rotating a winding shaft for winding or unwinding and rewinding a greenhouse film,
The drive unit includes a moving mechanism that can move along the guide rod-shaped member;
The moving mechanism has an engaging portion that is urged by an urging unit in a direction in which the moving mechanism is pressed against the guide rod-shaped member together with the winding shaft ,
The engaging portion is provided in a positional relationship that sandwiches the guide rod-shaped member with the take-up shaft, and the urging means presses the engaging portion against the guide rod-shaped member together with the take-up shaft. The base end is connected to the casing of the drive unit so as to be biased, and the other end is normally biased toward each other in the expanding direction--consisting of an elastic member having a pair of spring portions Film opener for greenhouses.
前記弾性部材が、略M字状に屈曲されたバネ材からなり、外側に位置する各直線部により前記―対のバネ部が構成され、各直線部同士を連結する中間部と各直線部との交差部が、前記基端として、前記駆動部のケーシングに連結されていることを特徴とする請求項記載の温室用フィルム開閉装置。The elastic member is made of a spring material bent in a substantially M-shape, and each of the straight portions located on the outside constitutes the pair of spring portions, and an intermediate portion and straight portions that connect the straight portions. cross section, as the proximal end, greenhouse films switchgear according to claim 1, characterized in that it is connected to the casing of the drive unit. 前記―対のバネ部の各他端が、前記ガイド用棒状部材を挟んで巻き取り軸の略反対側に位置するように屈曲されてガイド用棒状部材に押し付けられる方向に付勢され、該各他端が前記係合部を構成していることを特徴とする請求項又は記載の温室用フィルム開閉装置。The other ends of the pair of spring portions are urged in directions in which the other ends of the pair of spring portions are bent and pressed against the guide rod-shaped member so as to be positioned substantially opposite to the winding shaft with the guide rod-shaped member interposed therebetween, The greenhouse film opening / closing device according to claim 1 or 2, wherein the other end constitutes the engaging portion. 前記―対のバネ部の各他端に、前記ガイド用棒状部材を挟んで巻き取り軸の略反対側に位置するガイドローラを設け、該ガイドローラが前記係合部を構成してガイド用棒状部材に押し付けられる方向に付勢されていることを特徴とする請求項又は記載の温室用フィルム開閉装置。At the other end of the pair of spring portions, a guide roller is provided on the opposite side of the take-up shaft across the guide rod-shaped member, and the guide roller constitutes the engaging portion to form a guide rod shape 3. The greenhouse film opening / closing device according to claim 1 , wherein the film opening / closing device is biased in a direction of being pressed against the member. 前記巻き取り軸のうち、前記付勢手段によって前記係合部と共にガイド用棒状部材に押し付けられる部位に、巻き取り軸の外面よりも摩擦抵抗の高い素材からなる筒部材が装着されていることを特徴とする請求項1〜のいずれか1に記載の温室用フィルム開閉装置。A cylindrical member made of a material having a higher frictional resistance than the outer surface of the take-up shaft is attached to a portion of the take-up shaft that is pressed against the guide rod-shaped member together with the engaging portion by the biasing means. The greenhouse film opening and closing device according to any one of claims 1 to 4, wherein the film opening and closing device is for greenhouses. 前記筒部材の外径が、巻き取り軸の移動範囲において、温室用フィルムを巻き取った際の温室用フィルムを含む巻き取り軸の実質上の最大外径と、温室用フィルムを巻き戻した際の実質上の最小外径との間の略中間の値に設定されていることを特徴とする請求項記載の温室用フィルム開閉装置。When the outer diameter of the cylindrical member is within the moving range of the winding shaft, the maximum outer diameter of the winding shaft including the greenhouse film when the greenhouse film is wound, and when the greenhouse film is rewound. 6. The greenhouse film opening / closing device according to claim 5 , wherein the film opening / closing device is set at a substantially intermediate value with respect to a substantially minimum outer diameter of the film. 前記筒部材が、―方の端部から他方の端部までの間で外径差を有する形状に形成されていることを特徴とする請求項記載の温室用フィルム開閉装置。6. The greenhouse film opening and closing device according to claim 5 , wherein the cylindrical member is formed in a shape having a difference in outer diameter between the end portion on the negative side and the other end portion. 前記筒部材は、―方の端部から他方の端部に向かって外径が大きくなるテーパ状に形成されていることを特徴とする請求項記載の温室用フィルム開閉装置。8. The greenhouse film opening and closing device according to claim 7 , wherein the cylindrical member is formed in a tapered shape having an outer diameter that increases from the negative end toward the other end. 前記筒部材は、少なくともいずれか―方の端部と略中心部との間で外径差を有する形状に形成されていることを特徴とする請求項記載の温室用フィルム開閉装置。6. The greenhouse film opening and closing device according to claim 5 , wherein the cylindrical member is formed in a shape having a difference in outer diameter between at least one of the end portions and the substantially central portion. 前記筒部材は、略中心部の外径が小さく、各端部の外径が大きい形状に形成されていることを特徴とする請求項記載の温室用フィルム開閉装置。10. The greenhouse film opening and closing device according to claim 9 , wherein the cylindrical member is formed in a shape having a small outer diameter at a substantially central portion and a large outer diameter at each end portion.
JP2003012856A 2003-01-21 2003-01-21 Greenhouse film opener Expired - Fee Related JP4058356B2 (en)

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KR101324747B1 (en) * 2011-11-15 2013-11-05 주식회사 유니크온 Guide Appratus for Green House Opening and Closing Device

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