JP3814075B2

JP3814075B2 - Stopping material and tensioning method for plastic film for greenhouse

Info

Publication number: JP3814075B2
Application number: JP10614898A
Authority: JP
Inventors: 仁新井; 敦及川
Original assignee: GREEN TEC CO., LTD.
Current assignee: GREEN TEC CO., LTD.
Priority date: 1997-07-01
Filing date: 1998-04-16
Publication date: 2006-08-23
Anticipated expiration: 2018-04-16
Also published as: JPH1169917A

Description

【０００１】
【発明の属する技術分野】
本発明は、温室の被覆材であるプラスチックフィルムを張設するための止め材に関する。
【０００２】
【従来の技術】
温室の被覆材であるプラスチックフィルムを張設するに当たっては、従来、図１１に示すような止め材１００が用いられている。すなわち、所定の長さを有し、底板部１１１と、該底板部１１１の両側縁から、底板部１１１とのなす角が鋭角となるような関係をもってかつ上端縁１１２ａ，１１３ａ間に間隔が生じるように立ち上げられた２つの側板部１１２，１１３とを有するベース部材（ベース金具）１１０と、該ベース金具１１０内に装填されるフィルム押さえ用スプリング部材１２０とを有して構成されている。
【０００３】
ベース金具１１０は、例えば、温室の天井面に幅方向に沿って、上端縁１１２ａ，１１３ａ間の開口部側を外側に向けて配設される。被覆材であるプラスチックフィルムＡ，Ｂは、まず一方のプラスチックフィルムＡの一端縁付近を天井面と妻面との境界部に固定し、他端縁付近をベース金具１１０の開口部上に位置させる。次に、他方のプラスチックフィルムＢの一端縁付近をベース金具１１０上で上部用のプラスチックフィルムＡの他端縁付近に重ね合わせる。かかる状態で山形に加工したスプリング部材１２０を２つのプラスチックフィルムＡ，Ｂの重なり合った部分を押さえ付けるようにベース金具１１０の開口部から挿入する。その結果、該スプリング部材１２０の各山の頂部がベース金具１１０の側板部１１２，１１３内面を押圧するため２つのプラスチックフィルムＡ，Ｂの端縁付近が固定される。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記した止め材１００は次のような問題がある。まず、スプリング部材１２０は、プラスチックフィルムＡ，Ｂに対して、各山の頂部だけで接触しているため、擦れによりフィルム面が摩耗し、破れやすいという問題がある。特に、近年は耐候性に優れ、燃やしても有害ガスを発生せず廃棄処理が容易なことからビニルフィルムではなく、ポリオレフィン系のプラスチックフィルムが普及しているが、このポリオレフィン系のプラスチックフィルムは、ビニルフィルムと比較して特に擦れに弱いという問題がある。
【０００５】
このようなことから、ポリオレフィン系のプラスチックフィルムを使用する場合には、上記したようにプラスチックフィルムＡ，Ｂの各端縁付近を一つのベース金具１１０に固定するのではなく、ベース金具を左右に２本併設して右側に配置されたものに一方のプラスチックフィルムＡの他端縁付近を、左側に配置されたものに他方のプラスチックフィルムＢの一端縁付近をそれぞれスプリング部材により固定することが行われている。この方法によれば、２枚のプラスチックフィルムＡ，Ｂを重ねてベース金具１１０に固定する場合と比較して、弾性力の弱いスプリング部材を用いることができ、擦れによる損傷を軽減することができる。しかしながら、この場合には、２枚のプラスチックフィルムＡ，Ｂのいずれか一方の端縁を固定するために２本のベース金具を用いる必要があり、その幅分、温室内に影が多く生じるという問題がある。
【０００６】
本発明は上記事情に鑑みなされたものであり、隣接するプラスチックフィルムの端縁付近をまとめて１本のベース部材に固定することができると共に、擦れによるフィルム面の局部的な摩耗による破れの発生を少なくすることができる温室用プラスチックフィルムの止め材を提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記した課題を達成するため、請求項１では、温室の被覆材であるプラスチックフィルムを固定するための止め材であって、
各上端縁間に所定の間隔を有すると共に、各上端縁の下部に該上端縁間の間隔よりも対向間隔が広くなるテーパ部位を有するように対向して形成された２つの側板部を有するベース部材と、
該側板部間に挿入される挿入部を有すると共に、該挿入部の一方の側部に、ベース部材の底板部に対して直交する方向に引き上げられた場合に一方の側板部内面に係合し、かつ一方向に傾斜させて引き上げようとしても該一方の側板部内面に係合して傾斜を規制する第１の係合部を有し、該挿入部の他方の側部に、ベース部材の底板部に対して直交する方向に引き上げられた場合に他方の側板部内面に係合するが、他方向に傾斜させて引き上げようとする場合には他方の側板部内面に係合しない第２の係合部を有する押さえ部材と、を有し、
前記プラスチックフィルムをベース部材と押さえ部材との間に挟持して固定する温室用プラスチックフィルムの止め材を提供する。
請求項２では、前記ベース部材と押さえ部材が金属材料からなる請求項１記載の温室用プラスチックフィルムの止め材を提供する。
請求項３では、前記ベース部材の底板部の上面に突条部が形成されていると共に、前記押さえ部材を前記他方向に傾斜させて引き上げようとする場合に、該突条部に引っかかる突起部が、該押さえ部材の挿入部の外面に設けられている請求項１又は２記載の温室用プラスチックフィルムの止め材を提供する。
請求項４では、前記押さえ部材の挿入部のいずれかの係合部に、該挿入部をベース部材の側板部間に挿入した際、側板部間から外方に突出すると共に、内方に屈曲された屈曲部を有する突出片を備えた請求項１〜３のいずれか１に記載の温室用プラスチックフィルムの止め材を提供する。
【０００８】
請求項５では、請求項１〜４のいずれか１に２記載の温室用プラスチックフィルムの止め材を用いたプラスチックフィルムの張設方法であって、
一端縁付近が適所に固定されたプラスチックフィルムに隣接して配置される他のプラスチックフィルムを重ね合わせ、重ね合わせた各他端縁付近をベース部材上に位置させた後、押さえ部材の挿入部を、第２の係合部側が、該各プラスチックフィルムの他端縁側に位置するようにしてベース部材の側板部間に挿入し、該２枚のプラスチックフィルムの他端縁付近を一緒に固定する工程、該挿入部の第１の係合部とベース部材との間から引き出されている他のプラスチックフィルムをベース部材の側板部上端縁間の間隔を跨ぐように折り返し、その一端縁付近を適所に固定する工程、を有することを特徴とする温室用プラスチックフィルムの張設方法を提供する。
【０００９】
請求項６では、温室の被覆材であるプラスチックフィルムを固定するための止め材であって、
各上端縁間に所定の間隔を有すると共に、各上端縁の下部に該上端縁間の間隔よりも対向間隔が広くなるテーパ部位を有するように対向して形成された２つの側板部を有するベース部材と、
該側板部間に挿入される挿入部を有すると共に、該挿入部の一方の側部に、ベース部材の底板部に対して直交する方向に引き上げられた場合に一方の側板部内面に係合し、かつ一方向に傾斜させて引き上げようとしても該一方の側板部内面に係合して傾斜を規制する第１の係合部を有し、該挿入部の他方の側部に、ベース部材の底板部に対して直交する方向に引き上げられた場合に他方の側板部内面に係合するが、他方向に傾斜させて引き上げようとする場合には他方の側板部内面に係合しない第２の係合部を有し、さらに挿入部の反対面側に形成された凹部を有する第１の押さえ部材と、
該第１の押さえ部材の凹部内に挿入される挿入部を有すると共に、該挿入部における前記第１の押さえ部材の第２の係合部と同側部に、前記他方向と同方向にに傾斜させて引き上げようとする場合に凹部の内面に係合する第１の係合部を、第１の押さえ部材の第１の係合部と同側部に、前記一方向と同方向に傾斜させて引き上げようとする場合には凹部の内面に係合しない第２の係合部を有する第２の押さえ部材と、を有し、
一のプラスチックフィルムをベース部材と第１の押さえ部材との間に、他のプラスチックフィルムを第１の押さえ部材と第２の押さえ部材との間に挟持して固定する温室用プラスチックフィルムの止め材を提供する。
請求項７では、前記ベース部材、第１の押さえ部材及び第２の押さえ部材が金属材料からなる請求項６記載の温室用プラスチックフィルムの止め材を提供する。
請求項８では、前記ベース部材の底板部の上面に突条部が形成されていると共に、前記第１の押さえ部材を前記他方向に傾斜させて引き上げようとする場合に、該突条部に引っかかる突起部が、該第１の押さえ部材の挿入部の外面に設けられている請求項６又は７記載の温室用プラスチックフィルムの止め材を提供する。
請求項９では、前記第１の押さえ部材の挿入部のいずれかの係合部に、該挿入部をベース部材の側板部間に挿入した際、側板部間から外方に突出すると共に、内方に屈曲された屈曲部を有する突出片を備えており、前記第２の押さえ部材の挿入部における第１の押さえ部材に形成した突出片と対向する側の係合部に、内方に屈曲された屈曲部を有する突出片を備えている請求項６〜８のいずれか１に記載の温室用プラスチックフィルムの止め材を提供する。
【００１０】
請求項１０では、請求項６〜９のいずれか１に記載の温室用プラスチックフィルムの止め材を用いたプラスチックフィルムの張設方法であって、
一端縁付近が適所に固定された一のプラスチックフィルムの他端縁付近をベース部材上に位置させた後、第１の押さえ部材の挿入部を、第２の係合部側が、該各プラスチックフィルムの他端縁側に位置するようにしてベース部材の側板部間に挿入する工程、他のプラスチックフィルムの一端縁付近を第１の押さえ部材の凹部上に位置させた後、第２の押さえ部材の挿入部を、その第１の係合部側が他のプラスチックフィルムの一端縁と反対側に位置するように該凹部に挿入する工程、他のプラスチックフィルムの他端縁付近を適所に固定する工程、を有することを特徴とする温室用プラスチックフィルムの張設方法を提供する。
【００１１】
【発明の実施の形態】
以下、図面に示した実施の形態に基づき本発明をさらに詳細に説明する。図１及び図２は、本発明の第１の実施の形態にかかる温室用プラスチックフィルムの止め材１を示す図であり、ベース部材２と押さえ部材３を有して構成されている。
【００１２】
ベース部材２は、所定の長さを有し、底板部２１、該底板部２１の各側縁から該底板部２１となす内角が鋭角となるように立ち上げられた側板部２２，２３を有している。この側板部２２，２３は、さらに、上端縁２２ａ，２３ａ間に所定の間隔を保持するように立ち上げられている。すなわち、ベース部材２は、断面でみると底板部２１を底辺とする略三角形をなしているが、頂部付近が切り取られているような形状である。また、本実施の形態では、底板部２１の上面に、幅方向に所定間隔をおいて長手方向に沿って２つの突条部２１ａ，２１ｂが形成されている。さらに、側板部２２，２３の上端縁２２ａ，２３ａも、長手方向に沿って膨出するように形成されている。なお、突条部２１ａ，２１ｂ及び上端縁２２ａ，２３ａのいずれもプラスチックフィルムを損傷しないよう先端面は丸く加工されている。また、ベース部材２は、側板部２２，２３の上端縁２２ａ，２３ａ間の対向間隔よりも、該上端縁２２ａ，２３ａの下部に裾広がりのテーパ部位が形成され、該テーパ部位間の対向間隔が上端縁２２ａ，２３ａ間の対向間隔より広ければよく、本実施の形態のように、必ずしも側板部２２，２３の全体がテーパ状である必要はない。
【００１３】
押さえ部材３は、ベース部材２とほぼ同じ長さを有し、断面略半円形の挿入部３１と、該挿入部３１のいずれかの上端縁から一旦内方に屈曲させた後外方に伸びる突出片３２とを有して構成されている。挿入部３１は、ベース部材２の底板部２１と２つの側板部２２，２３との間に囲まれた空間内に収容される程度の大きさで形成され、その頂部３１ｃがベース部材２の２つの突条部２１ａ，２１ｂ間に位置するように、かつ突出片３２が側板部２２，２３の上端縁２２ａ，２３ａのいずれか一方を乗り越えるように配設される。
【００１４】
挿入部３１のうち、突出片３２が連設されていない側の上端縁は第１の係合部３１ａとして機能し、一旦内方に屈曲して突出片３２が連設されている他方の上端縁は第２の係合部３１ｂとして機能する。また、第１の係合部３１ａと第２の係合部３１ｂとの外面間の間隔は、ベース部材２の側板部２２，２３の上端縁２２ａ，２３ａ間の間隔よりも僅かに広くなるように形成されている。その結果、底板部２１に対して直交する方向に真っ直ぐ引き上げた場合には第１の係合部３１ａと第２の係合部３１ｂが、それぞれ２つの側板部２２，２３の内面に当接して係合する。その一方、突出片３２が浮き上がるように傾斜させて引き上げた場合には、他方の側板部２３の内面に第２の係合部３１ｂが係合せずに上端縁２２ａ，２３ａの間隙から抜け出ることができるが、これと逆方向に傾斜させようとすると、突出片３２が他方の側板部２３の上端縁に接触してその動きが規制され、第１の係合部３１ａは、一方の側板部２２の内面に当接して係合する。
【００１５】
本実施の形態によれば、プラスチックフィルムは次のように張設される。温室の天井面に２枚のプラスチックフィルムＡ，Ｂを張設する場合を例にとり説明する。まず、予め、ベース部材２を温室天井面の適所に幅方向に沿って配設する。一方のプラスチックフィルムＡの一端縁付近を温室の天井面と妻面との境界部に固定する。次に、他方のプラスチックフィルムＢをこの一方のプラスチックフィルムＡに重ねるように作業者が保持し、２つのフィルムの他端縁付近をベース部材２の側板部２２，２３間の開口部上に位置させる。次に、押さえ部材３の挿入部３１を、第２の係合部３１ｂがフィルムの他端縁側に位置するようにして、かつ、各フィルムの他端縁が第２の係合部３１ｂとベース部材２の他方の側板部２３から多少はみ出るようにして、ベース部材２の側板部２２，２３間に挿入する。このとき、ベース部材２の底板部２１には、２つの突条部２１ａ，２１ｂが形成されているため、断面略半円状の挿入部３１の外周面がプラスチックフィルムＡ，Ｂを介してこの２つの突条部２１ａ，２１ｂに当接し、所定位置に位置決めされる。次に、ベース部材２の一方の側板部２２と押さえ部材３の第１の係合部３１ｂから引き出されている他方のプラスチックフィルムＢを折り返し、ベース部材２の側板部２２，２３上端縁間の間隔を跨ぐようにして図上左側に引っ張る。最後に、他方のプラスチックフィルムＢの一端縁付近を図２に示した止め具１と所定間隔をおいて配設される別の止め具（図示せず）に、さらに別のプラスチックフィルム（図示せず）の端縁と共に、上記と同様にして固定する。天井面形成用のプラスチックフィルムを張設する場合は、このような作業を温室の他方の妻面に至るまで繰り返し、複数枚のプラスチックフィルムを張設する。
【００１６】
この結果、張設したプラスチックフィルムＡ，Ｂに風等によりばたつきが生じて各プラスチックフィルムＡ，Ｂに図２の矢印方向に張力が加わった場合、ベース部材２と押さえ部材３の第２の係合部３１ｃからはみ出ている部分の面積が小さいため、押さえ部材３の第１の係合部３１ｂ側がベース部材２の底板部２１から傾斜して引き上げられるような力が大きく作用する。しかしながら、この際、押さえ部材３の第１の係合部３１ｂはベース部材２の一方の側板部２２の内面に係合するため、押さえ部材３がベース部材２から離脱することなく、いずれのプラスチックフィルムＡ，Ｂもベース部材２と押さえ部材３とにより挟持された状態が維持される。
【００１７】
また、各プラスチックフィルムＡ，Ｂに対して、押さえ部材３の第１の係合部３１ｂが点接触でなく、線状（面）で接触する。従って、従来の山形に加工したスプリング部材を用いた場合と比較して、プラスチックフィルムＡ，Ｂが部分的に摩耗して破れを生じることが少なくなり、被覆材としてポリオレフィン系のフィルムを採用する場合に好適である。
【００１８】
なお、張設したプラスチックフィルムＡ，Ｂを取り外す際には、一方のプラスチックフィルムＡの一端縁及び他方のプラスチックフィルムＢの一端縁は固定したまま、ベース部材２の他方の側板部２３と押さえ部材３の第２の係合部３１ｂとからはみ出している部分を引き上げれば、押さえ部材３の突出片３２がその下面から押圧され、第２の係合部３１ｂ側が引き上げられる。このように傾斜して引き上げられた場合には、第２の係合部３１ｂが他方の側板部２３の内面に接触したとしても係合しないため、ベース部材２内から挿入部３１が容易に離脱される。これにより、プラスチックフィルムＡ，Ｂの各他端縁の固定が解除される。
【００１９】
次に、図３及び図４に示した本発明の第２の実施の形態について説明する。本実施の形態では、上記第１の実施の形態と全く同じ形状のベース部材２と、第１の実施の形態と全く同じ形状の押さえ部材である第１の押さえ部材３のほか、さらに、第２の押さえ部材４を用いている。
【００２０】
第２の押さえ部材４は、第１の押さえ部材３の挿入部３１を上記したように断面略半円形とすることにより反対面に形成される凹部３５内に収まる程度の大きさの断面略円弧状の挿入部４１を有している。そして、該挿入部４１の一方の上端縁が第１の係合部４１ａとして機能し、他方の上端縁が第２の係合部４１ｂとして機能する。なお、第１の係合部４１ａと第２の係合部４１ｂの外面間の間隔は、後述のようにして第１の押さえ部材３の凹部３５内に挿入した際、ベース部材２の底板部２１に直交する方向に真っ直ぐ引き上げた場合に、第１の係合部４１ａと第２の係合部４１ｂが、凹部３５の内面に相当する第１の押さえ部材３の第１の係合部３１ａと第２の係合部３１ｂの各内面に当接して係合するが、傾斜して引き上げられた場合には、該凹部３５内から離脱できる程度の間隔で形成されている。また、挿入部４１の他方の上端縁である第２の係合部４１ｂには、一旦内方に屈曲した後、斜め上方に立ち上がり、その後、略水平に外側に屈曲されている突出片４２が連設されている。
【００２１】
第２の押さえ部材４は、プラスチックフィルムを介して、その第１の係合部４１ａが、第１の押さえ部材３の凹部３５内で該第１の押さえ部材３の第２の係合部３１ｂと同側部に位置するように、かつ、突出片４２の水平部分が、第１の押さえ部材３における第１の係合部３１ａ側に位置してベース部材２の一方の側板部２２の上端縁を乗り越えるように配設される（図４参照）。この結果、第１の係合部４１ａが押し上げられる方向に傾斜した場合には、第１の係合部４１ａが、凹部３５の内面、具体的には第１の押さえ部材３における第２の係合部３１ｂの内面にプラスチックフィルムを介して当接して係合する。逆方向、すなわち、第２の係合部４１ｂが押し上げられる方向に傾斜した場合には、突出片４２の傾斜範囲が規制されないため、第２の係合部４１ｂは、第１の押さえ部材３の凹部３５内面にプラスチックフィルムを介して接触しつつも係合せずに、凹部３５内から離脱する。
【００２２】
本実施の形態の止め材によれば、まず、上記した実施の形態と同様に、温室の天井面にベース部材２を幅方向に沿って配設する。次に、一方のプラスチックフィルムＡの一端縁付近を温室の天井面と妻面との境界部に固定し、他端縁付近をベース部材２の側板部２２，２３の開口部上に位置させる。次に、第１の押さえ部材３の第２の係合部３１ｂ及び突出片３２が、該一方のプラスチックフィルムＡの他端縁側となるように位置させて、底板部２１と側板部２２，２３とにより形成される空間に挿入部３１を挿入する。このとき、第１の押さえ部材３の第２の係合部３１ｂとベース部材２の他方の側板部２３との間からはみ出ている部分は、風等の影響を受けないよう、その部分の面積はできるだけ小さくするように留意する。この結果、該一方のプラスチックフィルムＡがばたついた場合、第１の押さえ部材３の第１の係合部３１ａ側が押し上げられるような力（図４の右向きの矢印方向の力）が作用するが、第１の係合部３１ａは、ベース部材２の一方の側板部２２に当接して係合するため、該一方のプラスチックフィルムＡの固定は解除されない。
【００２３】
次に、他方のプラスチックフィルムＢの一端縁付近を第１の押さえ部材３における凹部３５上に位置させる。そして、第２の押さえ部材４の第１の係合部４１ａが第１の押さえ部材３における第２の係合部３１ｂ側に位置するようにして、他方のプラスチックフィルムＢの一端縁付近を押さえつけるように、該凹部３５内に挿入する。なお、このとき、第２の押さえ部材４の第２の係合部４１ｂと凹部３５との隙間からはみ出る部分の面積ができるだけ小さくなるように留意する。他方のプラスチックフィルムＢの他端縁は、温室天井面に上記止め材と平行に配設される別の止め材（図示せず）に、さらに別のプラスチックフィルム（図示せず）の一端縁付近と共に固定する。この結果、他方のプラスチックフィルムＢが風等によりばたついた場合、第２の押さえ部材４の第１の係合部４１ａ側が押し上げられるような力（図４の左向きの矢印方向の力）が作用するが、該第１の係合部４１ａは凹部３５の内面である第１の押さえ部材３における第２の係合部３１ｂの内面に当接して係合するため、該他方のプラスチックフィルムＢの挟持状態が保持される。
【００２４】
張設した２枚のプラスチックフィルムＡ，Ｂを取り外す際は、一方のプラスチックフィルムＡの場合には、第１の押さえ部材３の第２の係合部３１ｂとベース部材２の他方の側板部２３とからはみ出た部分、他方のプラスチックフィルムＢの場合には、第２の押さえ部材４の第２の係合部４１ｂと第１の押さえ部材３の凹部３５からはみ出た部分を作業者が引き上げればよい。
【００２５】
図５及び図６は、本発明の第３の実施の形態にかかる温室用プラスチックフィルムの止め材１を示す図であり、ベース部材２に対し、押さえ部材として、第１の押さえ部材３及び第２の押さえ部材４を用いている点は上記第２の実施の形態と同様である。
【００２６】
但し、第１の押さえ部材３の挿入部３１の外面には突起部３１ｄが設けられている。第１の押さえ部材３に対し、第２の係合部３１ｂ側が押し上げられるような力（図５の左向きの矢印方向の力）が作用した場合には、上記各実施の形態では第２の係合部３１ｂがベース部材２の他方の側板部２３に係合しないため、外れ易く構成されている。もちろん、プラスチックフィルムＡ，Ｂをきちんと張設している限り、上記各実施の形態で説明したように通常は問題ないが、何らかの要因でフィルムのテンションが緩むこともあり得る。そこで、本実施の形態では、このような事態にも対処するために、フィルムのテンションが緩んで容易に外れてしまうことがないよう、念のために突起部３１ｄを形成したものである。従って、この突起部３１ｄは、第１の押さえ部材３に対し、第２の係合部３１ｂ側が押し上げられるような力が作用した場合にベース部材２のいずれかの部位に引っかかるように設ける必要がある。本実施の形態では、このような力が作用した場合にベース部材２の一方の突条部２１ａに当接する位置に突起部３１ｄを形成しているが、これに限定されるものではない。例えば、他方の突条部２１ｂに当接し得る位置に形成してもよい。なお、このような突起部３１ｄを形成することが好ましいことは、上記した第１の実施の形態のように、押さえ部材３を一つだけ用いる場合でも同様である。
【００２７】
また、本実施の形態では、図５及び図６に示したように、第１の押さえ部材３の突出片３２を内方に屈曲した屈曲部３２ａを有する形状に形成し、第２の押さえ部材４の突出片４２を同じく内方に屈曲した屈曲部４２ａを有する形状に形成している。これにより、２つの屈曲部３２ａ，４２ａ同士が対向して設けられることになり、両者間に、ハウスバンド固定用の金具（バネ等）を挿入配置することもできる。
【００２８】
図７及び図８は、本発明の第４の実施の形態にかかる温室用プラスチックフィルムの止め材１’を示す図であり、ベース部材２’と押さえ部材３’を有して構成される。
【００２９】
ベース部材２’の形状は、上記第１の実施の形態とほぼ同様で、所定の長さを有し、底板部２１’と、両側縁から鋭角に立ち上げられ、上端縁２２’ａ，２３’ａ間に所定の間隔を有する側板部２２’，２３’を有して構成される。但し、第１の実施の形態と異なり、底板部２１’上には押さえ部材３’の位置決めのための突条部は形成されていない。
【００３０】
押さえ部材３’は、略円弧状の挿入部３１’と、この挿入部３１’の両側縁から下方に突出するように設けられた第１の係合部３１’ａと第２の係合部３１’ｂとを有して構成されている。第１の係合部３１’ａは、挿入部３１’の長手方向中心とベース部材２’の底板部２１’の長手方向中心とを略一致させたときに、先端が底板部２１’と一方の側板部２２’との境界付近に至るほど大きく外方に反るように突出し、第２の係合部３１’ｂは、ほぼ真っ直ぐ下方に延びた後、先端付近が僅かに外方に突出している。また、第１の係合部３１’ａと第２の係合部３１’ｂの最も外方に突出した部分間の間隔は、ベース部材２の底板部２１’に対して直交する方向に真っ直ぐ引き上げた場合には、第１の係合部３１’ａと第２の係合部３１’ｂのいずれもがベース部材２の側板部２２’，２３’の内面に係合する程度で形成される。また、挿入部３１’の各上端縁には、長手方向に沿って、かつ該各上端縁を中心として両側に突出する突出片３２’，３３’が形成されている。
【００３１】
従って、本実施の形態では、第１の実施の形態と同様、上記したベース部材２’の側板部２２’，２３’の上端縁２２’ａ，２３’ａ間上に、２枚のプラスチックフィルムＡ，Ｂの端縁付近を位置させ、押さえ部材３’の挿入部３１’によって該プラスチックフィルムＡ，Ｂを押さえ付けるように挿入する。プラスチックフィルムＡ，Ｂがばたつくことにより、第１の係合部３１’ａ側が引き上げられるような力（図８の矢印方向の力）が作用した場合には、第１の係合部３１’ａが一方の側板部２２’の内面にプラスチックフィルムを介して当接して係合するため、ベース部材２’から離脱せず、プラスチックフィルムＡ，Ｂを保持できる。一方、プラスチックフィルムＡ，Ｂの第２の係合部３１’ｂとベース部材２の他方の側板部２３’との間からはみ出している部分を引き上げた場合には、第２の係合部３１’ｂ側が浮き上がるように傾斜するが、第２の係合部３１’ｂは僅かに外方に突出しているだけであるため、他方の側板部２３’内面に係合せず、底板部２１’と側板部２２’，２３’とにより形成される空間から離脱する。
【００３２】
次に、図９及び図１０に示した本発明の第５の実施の形態について説明する。本実施の形態では、上記第４の実施の形態と全く同じ形状のベース部材２’と、第４の実施の形態と全く同じ形状の押さえ部材である第１の押さえ部材３’のほか、さらに、第２の押さえ部材４’を用いている。
【００３３】
この第２の押さえ部材４’は、上記した第２の実施の形態の押さえ部材４と全く同様の形状であり、第１の押さえ部材３’の挿入部３１’の反対面に形成される凹部３５’内に収まる程度の大きさの断面略円弧状の挿入部４１’を有している。
【００３４】
そして、第２の押さえ部材４’は、プラスチックフィルムを介して、その第１の係合部４１’ａが、第１の押さえ部材３’の凹部３５’内において、該第１の押さえ部材３’の第２の係合部３１’ｂと同側部に位置するように、かつ、突出片４２’の水平部分が第１の押さえ部材３’における第１の係合部３１’ａ側に位置して一方の突出片３２’の上方に位置するように配設される。この結果、第１の係合部４１’ａが押し上げられる方向に傾斜しても、突出片４２’の水平部分が第１の押さえ部材３’の一方の突出片３２’の上面に当接して、傾斜範囲が規制されるため、第１の係合部４１’ａは、凹部３５’の内面にプラスチックフィルムＢを介して当接して係合する。逆方向、すなわち、第２の係合部４１’ｂが押し上げられる方向に傾斜した場合には、突出片４２’の傾斜範囲が規制されないため、第２の係合部４１’ｂは、第１の押さえ部材３’の凹部３５’内面にプラスチックフィルムＢを介して接触しつつも係合せずに、凹部３５’内から離脱する。
【００３５】
従って、本実施の形態の止め材は、上記した第２の実施の形態と全く同様の方法でプラスチックフィルムを張設することができる。
【００３６】
ここで、上記した各実施の形態にかかる止め材を構成するベース部材２，２’、押さえ部材３，３’，４，４’は、硬質樹脂により成形することも可能であるが、強度の点から、いずれもアルミ板等の金属材料から構成することが好ましい。
【００３７】
また、上記した説明では、温室の天井面を形成する複数枚のプラスチックフィルムを張設する場合を説明しているが、側面を形成する複数枚のプラスチックフィルムの止め材として用いることもできることはもちろんである。なお、側面を形成するプラスチックフィルムを張設する場合は、例えば、上部用と下部用の２枚のプラスチックフィルムを用意し、止め材を側面略中央に水平に配置して張設するが、雨水の浸入を防ぐため、該止め材に固定される上部用プラスチックフィルムと下部用プラスチックフィルムの重なり部分においては、上部用プラスチックフィルムが外側に位置するよう張設することが好ましい。
【００３８】
【発明の効果】
本発明の温室用プラスチックフィルムの止め材によれば、プラスチックフィルムに対し、押さえ部材及びベース部材が、点ではなく線状（面）で接触しているため、フィルムの擦れによる破損を従来の止め材と比較して少なくすることができる。従って、擦れ摩擦に弱いポリオレフィン系のプラスチックフィルムの止め材として適する。また、隣接する２枚のプラスチックフィルムの一方の端縁付近を１つの止め材で固定できるため、止め材を併設する必要がない。
【図面の簡単な説明】
【図１】図１は、本発明の第１の実施の形態にかかる止め材を示す斜視図である。
【図２】図２は、同実施の形態にかかる止め材を用いたプラスチックフィルムの張設方法を説明するための斜視図である。
【図３】図３は、本発明の第２の実施の形態にかかる止め材を示す斜視図である。
【図４】図４は、同実施の形態にかかる止め材を用いたプラスチックフィルムの張設方法を説明するための斜視図である。
【図５】図５は、本発明の第３の実施の形態にかかる止め材を示す斜視図である。
【図６】図６は、同実施の形態にかかる止め材を示す正面図である。
【図７】図７は、本発明の第４の実施の形態にかかる止め材を示す斜視図である。
【図８】図８は、同実施の形態にかかる止め材を用いたプラスチックフィルムの張設方法を説明するための斜視図である。
【図９】図９は、本発明の第５の実施の形態にかかる止め材を示す斜視図である。
【図１０】図１０は、同実施の形態にかかる止め材を用いたプラスチックフィルムの張設方法を説明するための斜視図である。
【図１１】従来の止め材を用いたプラスチックフィルムの張設方法を説明するための斜視図である。
【符号の説明】
１止め材
１’止め材
２ベース部材
２’ベース部材
３押さえ部材
３’押さえ部材
４第２の押さえ部材
４’第２の押さえ部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stopper for stretching a plastic film as a greenhouse covering material.
[0002]
[Prior art]
Conventionally, a stopper 100 as shown in FIG. 11 is used to stretch a plastic film as a greenhouse covering material. That is, it has a predetermined length, and a space is formed between the upper edge 112a and 113a so that the angle between the bottom plate 111 and both side edges of the bottom plate 111 is an acute angle. A base member (base metal fitting) 110 having two side plate portions 112 and 113 raised in this manner and a film pressing spring member 120 loaded in the base metal fitting 110 are configured.
[0003]
The base metal fitting 110 is disposed, for example, on the ceiling surface of the greenhouse along the width direction with the opening side between the upper end edges 112a and 113a facing outward. For the plastic films A and B, which are covering materials, first, the vicinity of one end edge of one plastic film A is fixed to the boundary between the ceiling surface and the end face, and the vicinity of the other end is positioned on the opening of the base metal fitting 110. . Next, the vicinity of one end edge of the other plastic film B is superimposed on the vicinity of the other end edge of the upper plastic film A on the base metal fitting 110. In this state, the spring member 120 processed into a mountain shape is inserted from the opening of the base metal fitting 110 so as to press down the overlapping portion of the two plastic films A and B. As a result, the tops of the peaks of the spring member 120 press the inner surfaces of the side plates 112 and 113 of the base metal 110, so that the vicinity of the edges of the two plastic films A and B is fixed.
[0004]
[Problems to be solved by the invention]
However, the above-described stopper 100 has the following problems. First, since the spring member 120 is in contact with the plastic films A and B only at the tops of the peaks, there is a problem that the film surface is worn by rubbing and easily broken. Particularly, in recent years, polyolefin-based plastic films, not vinyl films, are widely used because they are excellent in weather resistance, do not generate harmful gas even when burned, and are easy to dispose of. There is a problem that it is particularly vulnerable to rubbing as compared with a vinyl film.
[0005]
For this reason, when using a polyolefin-based plastic film, the base metal fitting is not fixed to one base metal fitting 110 instead of fixing the vicinity of each edge of the plastic films A and B as described above. A spring member is used to fix the vicinity of the other end of one plastic film A to the one disposed on the right side and the other end of the other plastic film B to the one disposed on the left side. It has been broken. According to this method, it is possible to use a spring member having a weak elastic force as compared with the case where two plastic films A and B are stacked and fixed to the base metal fitting 110, and damage due to rubbing can be reduced. . However, in this case, it is necessary to use two base metal fittings in order to fix one of the edges of the two plastic films A and B, and a shadow is generated in the greenhouse by the width. There's a problem.
[0006]
The present invention has been made in view of the above circumstances, and the vicinity of the edge of adjacent plastic films can be collectively fixed to one base member, and the occurrence of tearing due to local abrasion of the film surface due to rubbing can be achieved. An object of the present invention is to provide a stopper for a plastic film for greenhouses, which can reduce the amount of heat.
[0007]
[Means for Solving the Problems]
In order to achieve the above-described problem, in claim 1, a stopper for fixing a plastic film which is a greenhouse covering material,
A base having two side plate portions formed to face each other so as to have a predetermined interval between the upper end edges and a tapered portion where the opposing interval is wider than the interval between the upper end edges at the lower part of each upper end edge Members,
It has an insertion part to be inserted between the side plate parts, and engages with the inner surface of one side plate part when the side plate is pulled up in a direction perpendicular to the bottom plate part of the base member. And having a first engaging portion that engages with the inner surface of the one side plate portion to regulate the inclination even when it is inclined to be lifted in one direction, and on the other side portion of the insertion portion, When it is pulled up in a direction perpendicular to the bottom plate portion, it engages with the inner surface of the other side plate portion, but when it is inclined to be raised in the other direction, it does not engage with the inner surface of the other side plate portion. A holding member having an engaging portion,
Provided is a plastic film stopper for a greenhouse in which the plastic film is sandwiched and fixed between a base member and a pressing member.
According to a second aspect of the present invention, there is provided the greenhouse plastic film stopper according to the first aspect, wherein the base member and the pressing member are made of a metal material.
According to a third aspect of the present invention, when a protrusion is formed on the upper surface of the bottom plate portion of the base member and the pressing member is tilted in the other direction, the protrusion is caught by the protrusion. Is provided on the outer surface of the insertion portion of the pressing member. 3. A greenhouse plastic film stopper according to claim 1 or 2 provided.
According to a fourth aspect of the present invention, when the insertion portion is inserted between the side plate portions of the base member into any of the engaging portions of the insertion portion of the pressing member, it protrudes outward from between the side plate portions and bends inward. The stopper for a plastic film for greenhouses according to any one of claims 1 to 3, further comprising a protruding piece having a bent portion.
[0008]
Claim 5 is a plastic film stretching method using the greenhouse plastic film stopper according to any one of claims 1 to 4,
Overlay the other plastic film that is placed adjacent to the plastic film with the vicinity of one edge fixed in place, and place the vicinity of each overlapped other edge on the base member, And inserting the second engaging portion side between the side plate portions of the base member so that the second engaging portion side is located on the other end edge side of each plastic film, and fixing the vicinity of the other end edges of the two plastic films together. The other plastic film drawn out from between the first engaging portion of the insertion portion and the base member is folded back so as to straddle the interval between the upper end edges of the side plate portions of the base member, and the vicinity of one end edge thereof is put in place. There is provided a method for stretching a plastic film for a greenhouse characterized by comprising a fixing step.
[0009]
In Claim 6, it is a stop material for fixing the plastic film which is a covering material of a greenhouse,
A base having two side plate portions formed to face each other so as to have a predetermined interval between the upper end edges and a tapered portion where the opposing interval is wider than the interval between the upper end edges at the lower part of each upper end edge Members,
It has an insertion part to be inserted between the side plate parts, and engages with the inner surface of one side plate part when the side plate is pulled up in a direction perpendicular to the bottom plate part of the base member. And having a first engaging portion that engages with the inner surface of the one side plate portion to regulate the inclination even when it is inclined to be lifted in one direction, and on the other side portion of the insertion portion, When it is pulled up in a direction perpendicular to the bottom plate portion, it engages with the inner surface of the other side plate portion, but when it is inclined to be raised in the other direction, it does not engage with the inner surface of the other side plate portion. A first pressing member having an engagement portion and further having a recess formed on the opposite side of the insertion portion;
In addition to having an insertion portion inserted into the recess of the first pressing member, on the same side as the second engaging portion of the first pressing member in the insertion portion, in the same direction as the other direction The first engaging portion that engages with the inner surface of the recess when tilted and lifted is tilted in the same direction as the first direction on the same side as the first engaging portion of the first pressing member. And a second pressing member having a second engaging portion that does not engage with the inner surface of the recess when trying to pull up,
A greenhouse plastic film stopper that clamps and fixes one plastic film between the base member and the first pressing member and another plastic film between the first pressing member and the second pressing member. I will provide a.
According to a seventh aspect of the present invention, there is provided the plastic film stopper for a greenhouse according to the sixth aspect, wherein the base member, the first pressing member, and the second pressing member are made of a metal material.
In claim 8, when a ridge is formed on the upper surface of the bottom plate portion of the base member and the first pressing member is inclined to be raised in the other direction, The greenhouse plastic film stopper according to claim 6 or 7, wherein the hooked protrusion is provided on an outer surface of the insertion portion of the first pressing member.
According to a ninth aspect of the present invention, when the insertion portion is inserted between the side plate portions of the base member into any of the engagement portions of the insertion portion of the first pressing member, the projection protrudes outward from between the side plate portions, A protruding piece having a bent portion bent in the direction, and bent inward to the engaging portion on the side facing the protruding piece formed in the first pressing member in the insertion portion of the second pressing member. A stopper for a greenhouse plastic film according to any one of claims 6 to 8, comprising a protruding piece having a bent portion.
[0010]
Claim 10 is a method for stretching a plastic film using the greenhouse plastic film stopper according to any one of claims 6 to 9,
After the vicinity of the other end edge of one plastic film whose one end edge is fixed in place is positioned on the base member, the insertion portion of the first pressing member is connected to the second engaging portion side of each plastic film. A step of inserting between the side plate portions of the base member so as to be positioned on the other end edge side of the second plastic member, and after positioning the vicinity of one end edge of the other plastic film on the concave portion of the first pressing member, Inserting the insertion portion into the recess so that the first engagement portion side is located on the side opposite to the one end edge of the other plastic film, fixing the vicinity of the other end edge of the other plastic film in place, A method for stretching a plastic film for greenhouses is provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. 1 and 2 are views showing a greenhouse plastic film stopper 1 according to a first embodiment of the present invention, which includes a base member 2 and a pressing member 3.
[0012]
The base member 2 has a predetermined length, and includes a bottom plate portion 21 and side plate portions 22 and 23 raised from each side edge of the bottom plate portion 21 so that an internal angle formed with the bottom plate portion 21 is an acute angle. is doing. The side plate portions 22 and 23 are further raised so as to maintain a predetermined distance between the upper end edges 22a and 23a. That is, the base member 2 has a substantially triangular shape with the bottom plate portion 21 as a base when viewed in cross section, but has a shape in which the vicinity of the top portion is cut off. Further, in the present embodiment, two protrusions 21 a and 21 b are formed on the upper surface of the bottom plate portion 21 along the longitudinal direction at a predetermined interval in the width direction. Furthermore, upper edge 22a, 23a of the side-plate parts 22 and 23 is also formed so that it may bulge along a longitudinal direction. It should be noted that the tip surfaces of the protrusions 21a and 21b and the upper end edges 22a and 23a are rounded so as not to damage the plastic film. Further, the base member 2 is formed with a taper portion having a hem extending at the lower part of the upper end edges 22a, 23a rather than the facing interval between the upper end edges 22a, 23a of the side plate portions 22, 23, and the facing interval between the tapered parts Need only be wider than the spacing between the upper end edges 22a and 23a, and the entire side plate portions 22 and 23 are not necessarily tapered as in the present embodiment.
[0013]
The holding member 3 has substantially the same length as the base member 2 and has an insertion part 31 having a substantially semicircular cross section, and extends outward after being bent inward from any upper end edge of the insertion part 31. And a projecting piece 32. The insertion portion 31 is formed in such a size that it can be accommodated in a space surrounded by the bottom plate portion 21 and the two side plate portions 22 and 23 of the base member 2, and the top portion 31 c is 2 of the base member 2. The protruding piece 32 is disposed so as to be positioned between the two protruding portions 21a and 21b and so as to get over any one of the upper end edges 22a and 23a of the side plate portions 22 and 23.
[0014]
The upper end edge of the insertion portion 31 on the side where the protruding piece 32 is not provided continuously functions as the first engaging portion 31a, and the other upper end where the protruding piece 32 is provided continuously after being bent inward once. The edge functions as the second engaging portion 31b. Further, the interval between the outer surfaces of the first engagement portion 31a and the second engagement portion 31b is slightly wider than the interval between the upper end edges 22a, 23a of the side plate portions 22, 23 of the base member 2. Is formed. As a result, the first engaging portion 31a and the second engaging portion 31b are in contact with the inner surfaces of the two side plate portions 22 and 23, respectively, when they are pulled straight up in a direction perpendicular to the bottom plate portion 21. Engage. On the other hand, when the projecting piece 32 is lifted so as to be lifted, the second engaging portion 31b may not be engaged with the inner surface of the other side plate portion 23 and may escape from the gap between the upper end edges 22a and 23a. However, if it is attempted to incline in the opposite direction, the protruding piece 32 comes into contact with the upper end edge of the other side plate portion 23 and its movement is restricted, and the first engaging portion 31a is connected to the one side plate portion 22. Abuts and engages the inner surface.
[0015]
According to the present embodiment, the plastic film is stretched as follows. A case where two plastic films A and B are stretched on the ceiling surface of the greenhouse will be described as an example. First, the base member 2 is previously arranged along the width direction at an appropriate place on the ceiling surface of the greenhouse. The vicinity of one edge of the plastic film A is fixed to the boundary between the ceiling surface and the wife surface of the greenhouse. Next, the operator holds the other plastic film B so as to overlap the one plastic film A, and the vicinity of the other edge of the two films is positioned on the opening between the side plates 22 and 23 of the base member 2. Let Next, the insertion portion 31 of the pressing member 3 is arranged such that the second engagement portion 31b is positioned on the other end edge side of the film, and the other end edge of each film is the base of the second engagement portion 31b. It is inserted between the side plate portions 22 and 23 of the base member 2 so as to protrude somewhat from the other side plate portion 23 of the member 2. At this time, since the two protrusions 21a and 21b are formed on the bottom plate portion 21 of the base member 2, the outer peripheral surface of the insertion portion 31 having a substantially semicircular cross section is interposed between the plastic films A and B. It abuts on the two ridges 21a and 21b and is positioned at a predetermined position. Next, the other plastic film B pulled out from one side plate portion 22 of the base member 2 and the first engaging portion 31b of the pressing member 3 is folded back, and between the upper edges of the side plate portions 22 and 23 of the base member 2 Pull to the left in the figure across the gap. Finally, another plastic film (not shown) is attached to another stopper (not shown) disposed at a predetermined distance from the stopper 1 shown in FIG. Z)) and fixing in the same manner as above. When a plastic film for forming a ceiling surface is stretched, such a work is repeated until the other wife surface of the greenhouse, and a plurality of plastic films are stretched.
[0016]
As a result, when the stretched plastic films A and B are fluttered by wind or the like and tension is applied to the plastic films A and B in the direction of the arrow in FIG. Since the area of the portion protruding from the joint portion 31c is small, a large force is exerted so that the first engagement portion 31b side of the pressing member 3 is inclined and lifted from the bottom plate portion 21 of the base member 2. However, at this time, since the first engaging portion 31b of the pressing member 3 engages with the inner surface of the one side plate portion 22 of the base member 2, the pressing member 3 is not separated from the base member 2, and any plastic is used. The state in which the films A and B are also sandwiched between the base member 2 and the pressing member 3 is maintained.
[0017]
In addition, the first engaging portion 31b of the pressing member 3 contacts the plastic films A and B not in a point contact but in a linear shape (surface). Therefore, compared with the case of using a spring member processed into a conventional chevron, the plastic films A and B are less likely to be partially worn and torn, and when a polyolefin film is used as a coating material. It is suitable for.
[0018]
When removing the stretched plastic films A and B, the one end edge of one plastic film A and the other end edge of the other plastic film B are fixed, and the other side plate portion 23 and the pressing member of the base member 2 are fixed. When the portion protruding from the third second engaging portion 31b is pulled up, the protruding piece 32 of the pressing member 3 is pressed from the lower surface, and the second engaging portion 31b side is pulled up. When the second engaging portion 31b is brought up by tilting in this way, even if the second engaging portion 31b comes into contact with the inner surface of the other side plate portion 23, the second engaging portion 31b is not engaged. Is done. Thereby, fixation of each other end edge of the plastic films A and B is released.
[0019]
Next, a second embodiment of the present invention shown in FIGS. 3 and 4 will be described. In the present embodiment, in addition to the base member 2 having the same shape as that of the first embodiment and the first pressing member 3 that is a pressing member having the same shape as that of the first embodiment, 2 holding members 4 are used.
[0020]
The second pressing member 4 has a substantially circular cross section having a size that can be accommodated in a recess 35 formed on the opposite surface by making the insertion portion 31 of the first pressing member 3 substantially semicircular in cross section as described above. An arcuate insertion portion 41 is provided. One upper end edge of the insertion portion 41 functions as the first engagement portion 41a, and the other upper end edge functions as the second engagement portion 41b. The interval between the outer surfaces of the first engaging portion 41a and the second engaging portion 41b is such that the bottom plate portion of the base member 2 is inserted into the recess 35 of the first pressing member 3 as will be described later. When the first engagement portion 41 a and the second engagement portion 41 b are pulled straight up in a direction orthogonal to the first direction 21, the first engagement portion 31 a of the first pressing member 3 corresponding to the inner surface of the recess 35 is formed. Are formed so as to be separated from the inside of the recess 35 when they are pulled up at an angle. The second engaging portion 41b, which is the other upper end edge of the insertion portion 41, has a protruding piece 42 that is bent inward once, then rises obliquely upward, and is then bent outward substantially horizontally. It is connected continuously.
[0021]
The second pressing member 4 has a first engaging portion 41a in the concave portion 35 of the first pressing member 3 through a plastic film, and the second engaging portion 31b of the first pressing member 3 is interposed therebetween. And the horizontal portion of the protruding piece 42 is positioned on the first engagement portion 31a side of the first pressing member 3 and is located at the upper end of one side plate portion 22 of the base member 2. It arrange | positions so that an edge may be overcome (refer FIG. 4). As a result, when the first engagement portion 41a is inclined in the direction in which the first engagement portion 41a is pushed up, the first engagement portion 41a is in contact with the inner surface of the recess 35, specifically, the second engagement of the first pressing member 3. The inner surface of the joint portion 31b is brought into contact with and engaged through a plastic film. When tilted in the reverse direction, that is, in the direction in which the second engaging portion 41 b is pushed up, the tilt range of the protruding piece 42 is not restricted, and therefore the second engaging portion 41 b is connected to the first pressing member 3. While coming into contact with the inner surface of the recess 35 through the plastic film, it is detached from the recess 35 without engaging.
[0022]
According to the stopper of the present embodiment, first, the base member 2 is disposed along the width direction on the ceiling surface of the greenhouse, as in the above-described embodiment. Next, the vicinity of one edge of one plastic film A is fixed to the boundary between the ceiling surface and the wife surface of the greenhouse, and the vicinity of the other edge is positioned on the openings of the side plates 22 and 23 of the base member 2. Next, the second engaging portion 31 b and the protruding piece 32 of the first pressing member 3 are positioned so as to be on the other end edge side of the one plastic film A, and the bottom plate portion 21 and the side plate portions 22, 23. The insertion portion 31 is inserted into the space formed by At this time, the area of the portion protruding from between the second engaging portion 31b of the first pressing member 3 and the other side plate portion 23 of the base member 2 is not affected by wind or the like. Take care to make it as small as possible. As a result, when the one plastic film A flutters, a force that pushes up the first engaging portion 31a side of the first pressing member 3 (the force in the right arrow direction in FIG. 4) acts. However, since the first engaging portion 31a contacts and engages with one side plate portion 22 of the base member 2, the fixing of the one plastic film A is not released.
[0023]
Next, the vicinity of one end edge of the other plastic film B is positioned on the recess 35 in the first pressing member 3. And the 1st engaging part 41a of the 2nd pressing member 4 is located in the 2nd engaging part 31b side in the 1st pressing member 3, and presses the edge vicinity of the other plastic film B In the same way, it is inserted into the recess 35. At this time, attention is paid so that the area of the portion of the second pressing member 4 that protrudes from the gap between the second engaging portion 41b and the concave portion 35 is as small as possible. The other end edge of the other plastic film B is adjacent to one end edge of another plastic film (not shown) on another stopping material (not shown) arranged in parallel with the above-mentioned stopping material on the greenhouse ceiling surface. Fix together. As a result, when the other plastic film B is fluttered by wind or the like, a force that pushes up the first engaging portion 41a side of the second pressing member 4 (force in the direction of the arrow in the left direction in FIG. 4) is generated. However, since the first engagement portion 41a contacts and engages with the inner surface of the second engagement portion 31b of the first pressing member 3 which is the inner surface of the recess 35, the other plastic film B Is held.
[0024]
When removing two stretched plastic films A and B, in the case of one plastic film A, the second engaging portion 31b of the first pressing member 3 and the other side plate portion 23 of the base member 2 are used. In the case of the other plastic film B, the operator can pull up the portion protruding from the second engaging portion 41b of the second pressing member 4 and the concave portion 35 of the first pressing member 3. That's fine.
[0025]
FIGS. 5 and 6 are views showing a greenhouse plastic film stopper 1 according to a third embodiment of the present invention. As a pressing member for the base member 2, the first pressing member 3 and the first pressing member 3 are shown. The point which uses the 2 pressing member 4 is the same as that of the said 2nd Embodiment.
[0026]
However, a protruding portion 31 d is provided on the outer surface of the insertion portion 31 of the first pressing member 3. When a force that pushes up the second engaging portion 31b side (force in the left arrow direction in FIG. 5) is applied to the first pressing member 3, the second engagement is performed in each of the above embodiments. Since the joining portion 31b does not engage with the other side plate portion 23 of the base member 2, the joining portion 31b is configured to be easily detached. Of course, as long as the plastic films A and B are properly stretched, there is usually no problem as described in the above embodiments, but the tension of the film may be loosened for some reason. Therefore, in the present embodiment, in order to cope with such a situation, the protrusion 31d is formed as a precaution so that the tension of the film does not loosen and easily comes off. Therefore, the protrusion 31d needs to be provided so as to be caught by any part of the base member 2 when a force that pushes up the second engaging portion 31b is applied to the first pressing member 3. is there. In the present embodiment, the protruding portion 31d is formed at a position where it contacts the one protruding portion 21a of the base member 2 when such a force is applied. However, the present invention is not limited to this. For example, you may form in the position which can contact | abut to the other protrusion 21b. Note that it is preferable to form such a protrusion 31d even when only one pressing member 3 is used as in the first embodiment described above.
[0027]
Moreover, in this Embodiment, as shown in FIG.5 and FIG.6, the protrusion 32 of the 1st pressing member 3 is formed in the shape which has the bending part 32a bent inward, and the 2nd pressing member The four protruding pieces 42 are also formed in a shape having a bent portion 42a bent inward. As a result, the two bent portions 32a and 42a are provided to face each other, and a metal fitting (spring or the like) for fixing the house band can be inserted between them.
[0028]
7 and 8 are views showing a greenhouse plastic film stopper 1 'according to a fourth embodiment of the present invention, which includes a base member 2' and a pressing member 3 '.
[0029]
The shape of the base member 2 ′ is substantially the same as that of the first embodiment, has a predetermined length, is raised at an acute angle from the bottom plate portion 21 ′ and both side edges, and the upper end edges 22 ′ a, 23. It is configured to have side plate portions 22 'and 23' having a predetermined interval between 'a'. However, unlike the first embodiment, no protrusion for positioning the pressing member 3 ′ is formed on the bottom plate portion 21 ′.
[0030]
The pressing member 3 ′ includes a substantially arc-shaped insertion portion 31 ′, and a first engagement portion 31 ′ a and a second engagement portion provided so as to protrude downward from both side edges of the insertion portion 31 ′. 31′b. The first engaging portion 31′a has a tip that is substantially the same as the bottom plate portion 21 ′ when the longitudinal center of the insertion portion 31 ′ and the longitudinal center of the bottom plate portion 21 ′ of the base member 2 ′ substantially coincide with each other. The second engaging portion 31 ′ b extends substantially straight downward and then protrudes slightly outward near the tip after reaching the boundary with the side plate portion 22 ′. ing. Further, the distance between the most outwardly projecting portions of the first engaging portion 31 ′ a and the second engaging portion 31 ′ b is straight in the direction orthogonal to the bottom plate portion 21 ′ of the base member 2. When pulled up, the first engaging portion 31 ′ a and the second engaging portion 31 ′ b are formed so as to engage with the inner surfaces of the side plate portions 22 ′ and 23 ′ of the base member 2. The Further, projecting pieces 32 ′ and 33 ′ are formed on each upper end edge of the insertion portion 31 ′ so as to project along the longitudinal direction and on both sides around the upper end edge.
[0031]
Therefore, in the present embodiment, as in the first embodiment, two plastic films are disposed between the upper end edges 22'a and 23'a of the side plate portions 22 'and 23' of the base member 2 '. The plastic films A and B are inserted so as to be pressed by the insertion portion 31 ′ of the pressing member 3 ′ in the vicinity of the edges of A and B. When the plastic film A, B flutters and a force (force in the direction of the arrow in FIG. 8) that pulls up the first engagement portion 31′a is applied, the first engagement portion 31′a However, since it contacts and engages with the inner surface of one side plate part 22 'via a plastic film, it can hold | maintain the plastic films A and B, without detaching | releasing from base member 2'. On the other hand, when the portion protruding from between the second engaging portion 31′b of the plastic films A and B and the other side plate portion 23 ′ of the base member 2 is pulled up, the second engaging portion 31 is pulled up. 'b side is inclined so as to be lifted, but the second engaging portion 31'b only slightly protrudes outward, so it does not engage with the inner surface of the other side plate portion 23', and the bottom plate portion 21 ' It leaves | separates from the space formed by side plate part 22 ', 23'.
[0032]
Next, a fifth embodiment of the present invention shown in FIGS. 9 and 10 will be described. In the present embodiment, in addition to the base member 2 ′ having the same shape as that of the fourth embodiment and the first pressing member 3 ′ that is a pressing member having the same shape as that of the fourth embodiment, The second pressing member 4 ′ is used.
[0033]
The second pressing member 4 ′ has the same shape as the pressing member 4 of the second embodiment described above, and is a recess formed on the opposite surface of the insertion portion 31 ′ of the first pressing member 3 ′. It has an insertion portion 41 ′ having a substantially arc-shaped cross section that is large enough to fit within 35 ′.
[0034]
Then, the second pressing member 4 ′ has a first engaging portion 41′a in the recess 35 ′ of the first pressing member 3 ′ via a plastic film. The horizontal portion of the protruding piece 42 ′ is located on the first engaging portion 31 ′ side of the first pressing member 3 ′ so as to be located on the same side portion as the second engaging portion 31 ′ b. It arrange | positions so that it may be located and may be located above one protrusion piece 32 '. As a result, even if the first engaging portion 41′a is inclined in the direction in which the first engaging portion 41′a is pushed up, the horizontal portion of the protruding piece 42 ′ comes into contact with the upper surface of one protruding piece 32 ′ of the first pressing member 3 ′. Since the inclination range is restricted, the first engagement portion 41′a is brought into contact with and engaged with the inner surface of the recess 35 ′ via the plastic film B. When tilted in the reverse direction, that is, in the direction in which the second engaging portion 41′b is pushed up, the tilting range of the protruding piece 42 ′ is not restricted, so the second engaging portion 41′b The pressing member 3 ′ is detached from the concave portion 35 ′ without engaging with the inner surface of the concave portion 35 ′ through the plastic film B.
[0035]
Therefore, the stopper material of the present embodiment can stretch the plastic film in the same manner as in the second embodiment described above.
[0036]
Here, the base members 2, 2 ′ and the pressing members 3, 3 ′, 4, 4 ′ constituting the stoppers according to the respective embodiments described above can be molded from hard resin, From the point of view, it is preferable that both are made of a metal material such as an aluminum plate.
[0037]
Further, in the above description, a case where a plurality of plastic films forming a ceiling surface of a greenhouse is stretched is described, but it can be used as a stopper for a plurality of plastic films forming a side surface. It is. In addition, when stretching the plastic film that forms the side surface, for example, two plastic films for the upper part and the lower part are prepared, and the stopper is horizontally disposed substantially at the center of the side surface. In order to prevent the penetration of the upper plastic film, it is preferable that the upper plastic film is stretched so that the upper plastic film is positioned on the outer side in the overlapping portion of the upper plastic film and the lower plastic film fixed to the stopper.
[0038]
【The invention's effect】
According to the greenhouse plastic film stopper of the present invention, since the pressing member and the base member are in contact with the plastic film in a linear shape (surface) instead of a point, damage due to film rubbing is prevented conventionally. It can be reduced compared to the material. Therefore, it is suitable as a stopper for polyolefin plastic film which is weak against rubbing friction. In addition, since one edge of the two adjacent plastic films can be fixed with one stopper, there is no need to provide a stopper.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a stopper according to a first embodiment of the present invention.
FIG. 2 is a perspective view for explaining a method for stretching a plastic film using the stopper according to the embodiment;
FIG. 3 is a perspective view showing a stopper according to a second embodiment of the present invention.
FIG. 4 is a perspective view for explaining a method for stretching a plastic film using the stopper according to the embodiment;
FIG. 5 is a perspective view showing a stopper according to a third embodiment of the present invention.
FIG. 6 is a front view showing the stopper according to the embodiment;
FIG. 7 is a perspective view showing a stopper according to a fourth embodiment of the present invention.
FIG. 8 is a perspective view for explaining a plastic film tensioning method using the stopper according to the embodiment;
FIG. 9 is a perspective view showing a stopper according to a fifth embodiment of the present invention.
FIG. 10 is a perspective view for explaining a plastic film tensioning method using the stopper according to the embodiment;
FIG. 11 is a perspective view for explaining a conventional method of stretching a plastic film using a stopper.
[Explanation of symbols]
1 Stop material
1 'stop material
2 Base member
2 'base member
3 Holding member
3 'holding member
4 Second holding member
4 'second holding member

Claims

A stopper for fixing a plastic film that is a covering material of a greenhouse,
A base having two side plate portions formed to face each other so as to have a predetermined interval between the upper end edges and a tapered portion where the opposing interval is wider than the interval between the upper end edges at the lower part of each upper end edge Members,
It has an insertion part to be inserted between the side plate parts, and engages with the inner surface of one side plate part when the side plate is pulled up in a direction perpendicular to the bottom plate part of the base member. And having a first engaging portion that engages with the inner surface of the one side plate portion to regulate the inclination even when it is inclined to be lifted in one direction, and on the other side portion of the insertion portion, When it is pulled up in a direction perpendicular to the bottom plate portion, it engages with the inner surface of the other side plate portion, but when it is inclined to be raised in the other direction, it does not engage with the inner surface of the other side plate portion. A holding member having an engaging portion,
A greenhouse plastic film stopper for holding and fixing the plastic film between a base member and a pressing member.

2. The greenhouse plastic film stopper according to claim 1, wherein the base member and the pressing member are made of a metal material.

When the protrusion is formed on the upper surface of the bottom plate portion of the base member and the pressing member is tilted in the other direction and is to be pulled up, the protruding portion caught by the protruding portion is the pressing member. The greenhouse plastic film stopper according to claim 1 or 2, which is provided on the outer surface of the insertion portion.

When the insertion portion is inserted between the side plate portions of the base member into any engagement portion of the insertion portion of the pressing member, a bent portion that protrudes outward from between the side plate portions and is bent inward is provided. The stopper for a plastic film for a greenhouse according to any one of claims 1 to 3, further comprising a protruding piece.

A method for stretching a plastic film using the greenhouse plastic film stopper according to any one of claims 1 to 4,
Overlay the other plastic film that is placed adjacent to the plastic film with the vicinity of one edge fixed in place, and place the vicinity of each overlapped other edge on the base member, And inserting the second engaging portion side between the side plate portions of the base member so that the second engaging portion side is located on the other end edge side of each plastic film, and fixing the vicinity of the other end edges of the two plastic films together. The other plastic film drawn out from between the first engaging portion of the insertion portion and the base member is folded back so as to straddle the interval between the upper end edges of the side plate portions of the base member, and the vicinity of one end edge thereof is put in place. A method of stretching a plastic film for greenhouses, comprising the step of fixing.

A stopper for fixing a plastic film that is a covering material of a greenhouse,
A base having two side plate portions formed to face each other so as to have a predetermined interval between the upper end edges and a tapered portion where the opposing interval is wider than the interval between the upper end edges at the lower part of each upper end edge Members,
It has an insertion part to be inserted between the side plate parts, and engages with the inner surface of one side plate part when the side plate is pulled up in a direction perpendicular to the bottom plate part of the base member. And having a first engaging portion that engages with the inner surface of the one side plate portion to regulate the inclination even when it is inclined to be lifted in one direction, and on the other side portion of the insertion portion, When it is pulled up in a direction perpendicular to the bottom plate portion, it engages with the inner surface of the other side plate portion, but when it is inclined to be raised in the other direction, it does not engage with the inner surface of the other side plate portion. A first pressing member having an engagement portion and further having a recess formed on the opposite side of the insertion portion;
In addition to having an insertion portion inserted into the recess of the first pressing member, on the same side as the second engaging portion of the first pressing member in the insertion portion, in the same direction as the other direction The first engaging portion that engages with the inner surface of the recess when tilted and lifted is tilted in the same direction as the first direction on the same side as the first engaging portion of the first pressing member. And a second pressing member having a second engaging portion that does not engage with the inner surface of the recess when trying to pull up,
A greenhouse plastic film stopper that clamps and fixes one plastic film between the base member and the first pressing member and another plastic film between the first pressing member and the second pressing member. .

7. The greenhouse plastic film stopper according to claim 6, wherein the base member, the first pressing member, and the second pressing member are made of a metal material.

When the ridge is formed on the upper surface of the bottom plate portion of the base member and the first pressing member is inclined to be raised in the other direction, the protrusion caught on the ridge is The stopper for a greenhouse plastic film according to claim 6 or 7, which is provided on an outer surface of the insertion portion of the first pressing member.

When the insertion portion is inserted between the side plate portions of the base member into any of the engagement portions of the insertion portion of the first pressing member, it protrudes outward from between the side plate portions and is bent inward. A protruding piece having a bent portion is provided, and a bent portion bent inward is formed on the engaging portion on the side facing the protruding piece formed on the first pressing member in the insertion portion of the second pressing member. The stopper for a plastic film for greenhouses according to any one of claims 6 to 8, further comprising a protruding piece having the protruding piece.

A method for stretching a plastic film using the greenhouse plastic film stopper according to any one of claims 6 to 9,
After the vicinity of the other end edge of one plastic film whose one end edge is fixed in place is positioned on the base member, the insertion portion of the first pressing member is connected to the second engaging portion side of each plastic film. A step of inserting between the side plate portions of the base member so as to be positioned on the other end edge side of the second plastic member, and after positioning the vicinity of one end edge of the other plastic film on the concave portion of the first pressing member, Inserting the insertion portion into the recess so that the first engagement portion side is located on the side opposite to the one end edge of the other plastic film, fixing the vicinity of the other end edge of the other plastic film in place, A method for stretching a plastic film for a greenhouse characterized by comprising: