JP2018057318A - Joint structure for duct, and connection method of duct - Google Patents

Joint structure for duct, and connection method of duct Download PDF

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JP2018057318A
JP2018057318A JP2016197131A JP2016197131A JP2018057318A JP 2018057318 A JP2018057318 A JP 2018057318A JP 2016197131 A JP2016197131 A JP 2016197131A JP 2016197131 A JP2016197131 A JP 2016197131A JP 2018057318 A JP2018057318 A JP 2018057318A
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duct
opening
peripheral surface
joint body
connection
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JP6853927B2 (en
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松沼　保夫
Yasuo Matsunuma
保夫 松沼
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    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor

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Abstract

PROBLEM TO BE SOLVED: To make connection work between ducts that are made of a plastic film.SOLUTION: In a joint structure for duct 1 of the present invention, a joint body 10 is made of an elastic material. In connecting to a peripheral surface part 111 of one duct (master duct) 110, the vicinity of a flange part 12 may only be deformed so as to reduce a diameter from outside, inserted into opening for connection 112 in this state, and fixed by a pressing member 20. In connecting the other duct (slave duct) 120 to this, the duct may be connected to a cylindrical part 11 protruded outside from the peripheral surface part 111 of the one duct (master duct) 110. Therefore, connection work can be performed easily comparing to the case of performing connection work inside the one duct (master duct) 110. Further, because the joint body is made of an elastic material, a connection state with each duct is maintained by the effect of its elastic force (restoring force).SELECTED DRAWING: Figure 1

Description

本発明は、ダクト用継手構造及びダクトの接続方法に関し、特に、温室に配設され、気体の流路を形成するダクトの接続に用いられるダクト用継手構造及びダクトの接続方法に関する。   The present invention relates to a duct joint structure and a duct connecting method, and more particularly, to a duct joint structure and a duct connecting method used for connecting a duct disposed in a greenhouse and forming a gas flow path.

特許文献１では、空気や二酸化炭素等の気体を温室内に供給するため、それらの供給源に連結されるダクトを温室内に設けている。具体的には、図５に示したように、気体の供給源１０００の出口管１０１０に接続されるメインダクト（親ダクト）１１００と、この親ダクト１１００から枝分かれされ、各栽培植物の株元付近に沿って敷設されるサブダクト（子ダクト）１２００とを備えている。子ダクトには、吐出口１２１０が開口され、この吐出口１２１０から所定の気体（図５の例では、外気と温室内空気を所定の割合で混合した気体）が各栽培植物に供給される。   In patent document 1, in order to supply gas, such as air and a carbon dioxide, in a greenhouse, the duct connected with those supply sources is provided in the greenhouse. Specifically, as shown in FIG. 5, a main duct (parent duct) 1100 connected to the outlet pipe 1010 of the gas supply source 1000, and a branch from the parent duct 1100, near the roots of each cultivated plant And a sub duct (child duct) 1200 laid along the line. A discharge port 1210 is opened in the child duct, and a predetermined gas (a gas in which outside air and greenhouse air are mixed at a predetermined ratio in the example of FIG. 5) is supplied from the discharge port 1210 to each cultivated plant.

一般に、温室内には、このような空気等の供給のためだけでなく、冷暖房装置に接続され、冷気や暖気を供給するダクト等、各種気体を供給するダクトが配設されているが、これらも通常、相対的に直径の大きな親ダクトと、この親ダクトからＴ字状に枝分かれされ、相対的に直径の小さい子ダクトとから構成されている。そして、これらのダクトはいずれもプラスチックフィルム製であり、親ダクトの周面部に容易に接続用開口を開設でき、子ダクトを所望の位置に連結することができる。しかしながら、両者を接続するための専用の部材が必要である。   Generally, in a greenhouse, ducts for supplying various gases such as ducts for supplying cold air and warm air are provided, not only for supplying such air but also connected to an air conditioner. Ordinarily, it is composed of a parent duct having a relatively large diameter and a child duct branched from the parent duct in a T-shape and having a relatively small diameter. Each of these ducts is made of a plastic film, and a connection opening can be easily opened in the peripheral surface portion of the parent duct, so that the child duct can be connected to a desired position. However, a dedicated member for connecting the two is necessary.

親ダクトに対して子ダクトをＴ字状に接続する部材として、例えば、非特許文献１に示されたものが知られている。これは相互に接合可能な２つのリングからなり、まず、２つのリングを未接合の状態で子ダクトの外周囲に配置し、次に、該子ダクトの開口端側に位置する一方のリングを、該子ダクトの開口端付近の部位と共に、親ダクト内に、その周面部に形成した切り込みから挿入する。その後、挿入した一方のリングに、他方のリングを接近させ、親ダクトの切り込みと子ダクトの開口端付近の部位を２つのリングで挟み込み、２つのリングを接合して固定するものである。   As a member for connecting the child duct in a T shape to the parent duct, for example, a member shown in Non-Patent Document 1 is known. This consists of two rings that can be joined to each other. First, the two rings are arranged in an unjoined state around the outer circumference of the child duct, and then one ring located on the open end side of the child duct is placed. In addition to the portion near the open end of the child duct, the child duct is inserted into the parent duct from the notch formed in the peripheral surface portion. Thereafter, the other ring is brought close to the inserted one ring, the notch of the parent duct and the portion near the opening end of the child duct are sandwiched between the two rings, and the two rings are joined and fixed.

特開２０１４−４２４８３号公報JP 2014-42483 A

株式会社誠和、商品名「ダクトリング」（インターネットＵＲＬ：https://www.seiwa-ltd.jp/products/%e3%83%80%e3%82%af%e3%83%88/）Seiwa Co., Ltd., product name “Duct Ring” (Internet URL: https://www.seiwa-ltd.jp/products/%e3%83%80%e3%82%af%e3%83%88/)

非特許文献１に開示の部材は、２つのリングからなるものであり、構成が非常に簡易である。接続作業も、一方のリングを切り込みから親ダクト内に挿入し、一方のリングを親ダクト内で保持しつつ、他方のリングを接合すればよいだけであり比較的容易である。しかしながら、接続作業はより容易であるほど望ましい。また、このリングは硬質プラスチックからなり、両者を接合した状態では、各ダクトを構成する柔軟なプラスチックフィルムを強固に挟み込む。そのため、ある程度使用した後に点検作業等で付け直したりする場合に、ダクトを構成するプラスチックフィルムに伸びなどの変形が生じていて、付け直し作業が行いにくい場合もあった。   The member disclosed in Non-Patent Document 1 is composed of two rings and has a very simple configuration. The connection work is also relatively easy because it is only necessary to insert one ring into the parent duct from the notch and hold the one ring in the parent duct while joining the other ring. However, the easier the connection is, the better. Further, this ring is made of hard plastic, and when both are joined, a flexible plastic film constituting each duct is firmly sandwiched. For this reason, when a part of the plastic film is used after a certain period of time, it may be difficult to perform the reattachment work because the plastic film constituting the duct has undergone deformation such as elongation.

本発明は上記に鑑みなされたものであり、プラスチックフィルムから構成されるダクト同士の接続作業をより容易に行うことができると共に、使用に伴う伸び等の変形を抑制し、付け直し作業への支障も抑制できるダクト用継手構造及びダクトの接続方法を提供することを課題とする。   The present invention has been made in view of the above, and it is possible to more easily connect ducts made of a plastic film, while suppressing deformation such as elongation caused by use, and hindering reattachment work. It is an object of the present invention to provide a joint structure for a duct and a method for connecting the duct, which can also suppress the above.

上記した課題を解決するため、本発明のダクト用継手構造は、
プラスチックフィルム製の一方のダクトの周面部に、プラスチックフィルム製の他方のダクトを略Ｔ字状に接続するためのダクト用継手構造であって、
弾性素材からなり、前記他方のダクトに連結される筒部と、前記一方のダクトの周面部に設けられた接続用開口よりも大きな外径で、前記筒部の一端に外方に突出するように設けられ、前記一方のダクトに連結されるフランジ部とを備えた継手本体と、
前記フランジ部を、前記接続用開口から前記一方のダクトの前記周面部の内側に挿入した状態で、前記接続用開口の周囲に位置する開口周縁部を、前記継手本体に押さえ付ける押さえ付け部材と
を有することを特徴とする。 In order to solve the above-described problems, the duct joint structure of the present invention is
A duct joint structure for connecting the other duct made of plastic film in a substantially T-shape to the peripheral surface portion of one duct made of plastic film,
It is made of an elastic material, and has a cylindrical portion connected to the other duct and an outer diameter larger than a connection opening provided in a peripheral surface portion of the one duct, and protrudes outward from one end of the cylindrical portion. And a joint body provided with a flange portion connected to the one duct,
A pressing member that presses the peripheral edge of the opening positioned around the opening for connection to the joint body in a state where the flange is inserted from the connection opening to the inside of the peripheral surface of the one duct; It is characterized by having.

前記継手本体の前記筒部内に挿入される、硬質素材からなる接続管をさらに有し、
前記他方のダクトが、その開口端から前記接続管を挿入した状態で、前記筒部内に挿入されて連結される構成であることが好ましい。
前記継手本体を構成する弾性素材が、ゴムであることが好ましい。
前記各ダクトが、温室に配設され、気体の流路を形成しているものであることが好ましい。 It further has a connecting pipe made of a hard material, which is inserted into the tube part of the joint body,
It is preferable that the other duct is configured to be inserted and coupled into the cylindrical portion in a state where the connection pipe is inserted from the opening end thereof.
The elastic material constituting the joint body is preferably rubber.
Each of the ducts is preferably disposed in a greenhouse and forms a gas flow path.

また、本発明のダクトの接続方法は、
プラスチックフィルム製の一方のダクトの周面部に、プラスチックフィルム製の他方のダクトを略Ｔ字状に接続するためのダクトの接続方法であって、
弾性素材からなり、筒部と、前記筒部の一端に設けられ、外方に突出しているフランジ部とを有する継手本体を用い、
前記一方のダクトの周面部に、前記フランジ部の外径よりも小さな接続用開口を形成する工程と、
前記接続用開口から前記フランジ部を前記一方のダクトの周面部の内側に挿入する工程と、
前記接続用開口の周囲に位置する開口周縁部を、前記継手本体に押さえ付け部材を用いて押さえ付ける工程と、
前記他方のダクトを前記筒部に連結する工程と
を有することを特徴とする。 The duct connecting method of the present invention includes:
A duct connecting method for connecting the other duct made of plastic film in a substantially T-shape to the peripheral surface portion of one duct made of plastic film,
Made of an elastic material, using a joint body having a tubular portion and a flange portion provided at one end of the tubular portion and projecting outward,
Forming a connection opening smaller than the outer diameter of the flange on the peripheral surface of the one duct;
Inserting the flange portion into the inside of the peripheral surface portion of the one duct from the connection opening;
The step of pressing the opening peripheral edge located around the connection opening to the joint body using a pressing member;
Connecting the other duct to the cylindrical portion.

前記他方のダクトを前記筒部に連結する工程では、硬質素材からなる接続管を、前記他方のダクトの開口端から挿入し、前記他方のダクトを前記接続管と共にに、前記筒部内に挿入して連結することが好ましい。
温室に配設され、気体の流路を形成するダクトの接続に用いられることが好ましい。 In the step of connecting the other duct to the cylindrical portion, a connecting pipe made of a hard material is inserted from the opening end of the other duct, and the other duct is inserted into the cylindrical portion together with the connecting pipe. Are preferably connected.
It is preferably used for connecting ducts that are disposed in a greenhouse and form a gas flow path.

本発明によれば、継手本体が弾性素材からなり、一方のダクト（親ダクト）の周面部に連結する際には、フランジ部付近を外側から縮径するように変形し、その状態で接続用開口に挿入して押さえ付け部材で固定するだけでよく、これに他方のダクト（子ダクト）を接続する場合には、一方のダクト（親ダクト）の周面部から外方に突出しいている筒部に連結すればよい。そのため、一方のダクト（親ダクト）の内部で接続作業を行う場合と比較して、より容易に接続作業を行うことができる。また、継手本体が弾性素材からなるため、その弾性力（復元力）の作用で各ダクトとの連結状態が維持される。よって、所定期間使用し、点検作業等で付け替える場合でも、各ダクトを構成するプラスチックフィルムに生じる伸び等の変形を抑制でき、付け替え作業に支障を来すこともなく、また、各ダクトの長寿命化に貢献できる。   According to the present invention, when the joint body is made of an elastic material and is connected to the peripheral surface portion of one duct (parent duct), the vicinity of the flange portion is deformed so as to reduce the diameter from the outside, and in that state for connection It only needs to be inserted into the opening and fixed with a pressing member, and when connecting the other duct (child duct) to this, the cylindrical part protruding outward from the peripheral surface of one duct (parent duct) Can be linked to. Therefore, the connection work can be performed more easily than the case where the connection work is performed inside one duct (parent duct). Moreover, since a joint main body consists of elastic materials, the connection state with each duct is maintained by the effect | action of the elastic force (restoring force). Therefore, even when it is used for a predetermined period and replaced by inspection work, etc., deformation such as elongation that occurs in the plastic film that constitutes each duct can be suppressed, so there is no hindrance to the replacement work and the long life of each duct. Can contribute to

図１は、本発明の一の実施形態にかかるダクト用継手構造を示す分解斜視図である。FIG. 1 is an exploded perspective view showing a duct joint structure according to an embodiment of the present invention. 図２は、上記実施形態にかかるダクト用継手構造の継手本体を示す図であり、（ａ）は側面図、（ｂ）は平面図、（ｃ）は（ｂ）のＡ−Ａ線断面図である。2A and 2B are views showing a joint body of the joint structure for duct according to the embodiment, wherein FIG. 2A is a side view, FIG. 2B is a plan view, and FIG. 2C is a cross-sectional view taken along line AA in FIG. It is. 図３は、継手本体を一方のダクト（親ダクト）に取り付ける工程を説明するための図である。Drawing 3 is a figure for explaining the process of attaching a joint main part to one duct (parent duct). 図４（ａ）は、一方のダクト（親ダクト）に継手本体を取り付けた後、他方のダクト（子ダクト）を筒部に連結する工程を説明するための図であり、図４（ｂ）は、両ダクトを連結した状態の要部を示した断面図である。FIG. 4A is a diagram for explaining a process of connecting the other duct (child duct) to the cylindrical portion after attaching the joint body to one duct (parent duct), and FIG. These are sectional drawings which showed the principal part of the state which connected both the ducts. 図５は、温室内に設置されるダクトの構成の一例を示した図である。FIG. 5 is a diagram illustrating an example of a configuration of a duct installed in a greenhouse.

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及び図２は、本実施形態にかかるダクト用継手構造１を示す図である。これらの図に示したように、本実施形態のダクト用継手構造１は、継手本体１０、押さえ付け部材２０及び接続管３０を備えている。   Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG.1 and FIG.2 is a figure which shows the joint structure 1 for ducts concerning this embodiment. As shown in these drawings, the duct joint structure 1 of this embodiment includes a joint body 10, a pressing member 20, and a connecting pipe 30.

ここで、本実施形態のダクト用継手構造１は、温室内において、冷暖房装置から供給される暖気や冷気、特許文献１に記載のように、空気を混合したり選択したりする装置から供給される外気、温室内空気若しくはそれらの混合空気、又は、二酸化炭素等の気体を供給するダクト同士の接続に用いられる。温室用のこれらのダクトは、プラスチックフィルムを用いており、一方のダクトに他方のダクトを接続する場合、一方のダクトの周面部の任意の位置に容易に接続用開口を設けることができる。すなわち、一方のダクトに対して、他方のダクトを略Ｔ字状に接続することが容易である。温室内には、栽培植物が保持された栽培容器等が多数配設されているが、例えば、相対的に直径の大きなダクト（親ダクト）の周面部に、相対的に直径の小さなダクト（子ダクト）を接続し、各栽培容器等に隣接した位置までそれらが行き渡るように配設され、栽培植物の近くで各子ダクトに形成した吐出口から所定の気体が吐出される。本実施形態のダクト用継手構造１は、このような親ダクトの周面部に子ダクトの軸方向開口端を接続する際に用いられる（図５参照）。   Here, the duct joint structure 1 of the present embodiment is supplied from a device that mixes and selects air as described in Patent Literature 1 in warm air and cold air supplied from an air conditioning device in a greenhouse. Used to connect ducts supplying gas such as outside air, greenhouse air or mixed air thereof, or carbon dioxide. These ducts for greenhouses use a plastic film, and when one duct is connected to the other duct, a connection opening can be easily provided at an arbitrary position on the peripheral surface portion of the one duct. That is, it is easy to connect the other duct in a substantially T shape to one duct. In the greenhouse, a large number of cultivation containers or the like holding cultivated plants are arranged. For example, a duct (child) having a relatively small diameter is disposed on a peripheral surface portion of a duct (parent duct) having a relatively large diameter. Ducts) are connected and arranged so as to extend to positions adjacent to each cultivation container and the like, and a predetermined gas is discharged from an outlet formed in each child duct near the cultivated plant. The duct joint structure 1 of the present embodiment is used when the axially open end of the child duct is connected to the peripheral surface portion of such a parent duct (see FIG. 5).

継手本体１０は、筒部１１と、該筒部１１の一端に一体に形成されたフランジ部１２とを有して構成される。そして、本実施形態は、フランジ部１２を一方のダクト（親ダクト）１１０の周面部１１１に簡易に連結できる。すなわち、筒部１１と他方のダクト（子ダクト）１２０とは、いずれも筒状であるため、両者の接続は基本的に容易であるが、本実施形態では、フランジ部１２の一方のダクト（親ダクト）１１０への接続も容易に行うことができる構造であるため、２つのダクト１１０，１２０を略Ｔ字状に接続する作業全体を極めて容易に行うことができる。   The joint body 10 includes a cylindrical portion 11 and a flange portion 12 formed integrally with one end of the cylindrical portion 11. In the present embodiment, the flange portion 12 can be easily connected to the peripheral surface portion 111 of one duct (parent duct) 110. That is, since both the cylinder part 11 and the other duct (child duct) 120 are cylindrical, the connection between the two is basically easy, but in this embodiment, one duct ( Since the connection to the parent duct 110 can be easily performed, the entire operation of connecting the two ducts 110 and 120 in a substantially T shape can be performed very easily.

フランジ部１２の一方のダクト（親ダクト）１１０への接続を容易に行うための構成として、まず、フランジ部１２の外径を、一方のダクト（親ダクト）１１０の周面部１１１に設けられる接続用開口１１２の直径よりも大きく形成し、かつ、筒部１１及びフランジ部１２を含む継手本体１０全体を弾性素材から形成している。そのため、図３に示したように、フランジ部１２付近を外方から手等により押しつぶせば、直径の小さな接続用開口１１２に該フランジ部１２を容易に通過させることができ、該フランジ部１２を接続用開口１１２の開口周縁部１１２ａの内側に容易に配置することができる。開口周縁部１１２ａの内側に配置した後は、押しつぶしていた外力を解除すれば、該フランジ部１２は周面部１１１の内側で復元して広がる（図３及び図４（ｂ）参照）。それにより、再度、外方から押しつぶしたりしない限りは、接続用開口１１２を介して外側に抜け落ちたりすることのなくることなく、一方のダクト（親ダクト）１１０に支持される。   As a configuration for easily connecting the flange portion 12 to one duct (parent duct) 110, first, the outer diameter of the flange portion 12 is connected to the peripheral surface portion 111 of the one duct (parent duct) 110. The entire joint body 10 including the cylindrical portion 11 and the flange portion 12 is formed of an elastic material. Therefore, as shown in FIG. 3, if the vicinity of the flange portion 12 is crushed by hand or the like from the outside, the flange portion 12 can be easily passed through the connection opening 112 having a small diameter. Can be easily arranged inside the opening peripheral edge 112a of the connection opening 112. After disposing inside the opening peripheral edge 112a, if the crushed external force is released, the flange 12 is restored and spreads inside the peripheral surface 111 (see FIGS. 3 and 4B). As a result, as long as it is not crushed again from the outside, it is supported by one duct (parent duct) 110 without falling outside through the connection opening 112.

継手本体１０を形成する弾性素材は、ゴムからなることが好ましい。ゴムを用いることにより、フランジ部１２の筒部１１側に位置する外表面１２ａが接続用開口１１２の開口周縁部１１２ａに接した際に高い摩擦力が機能し、開口周縁部１１２ａの位置ずれを抑制し、両者間の密着性を高めるのに寄与する。   The elastic material forming the joint body 10 is preferably made of rubber. By using rubber, a high frictional force functions when the outer surface 12a located on the cylindrical portion 11 side of the flange portion 12 comes into contact with the opening peripheral portion 112a of the connection opening 112, and the displacement of the opening peripheral portion 112a is shifted. It suppresses and contributes to improving the adhesiveness between them.

継手本体１０は、より具体的には、筒部１１が、接続対象の他方のダクト（子ダクト）１２０を接続できる直径の筒状に形成され、その一端に上記のフランジ部１２が一体に外方に突出するように形成されている。また、筒部１１とフランジ部１２との境界部１３は、内方にせり出しており、境界部１３の外面に凹部１３ａが形成され、内方にせり出した部位は段差部１３ｂとなっている。また、外面において、凹部１３ａと筒部１１との間には、リング状に外方に若干突出するリング状凸部１３ｃが形成されている。   More specifically, in the joint body 10, the cylindrical portion 11 is formed in a cylindrical shape having a diameter that can connect the other duct (child duct) 120 to be connected, and the flange portion 12 is integrally attached to one end thereof. It is formed so as to protrude in the direction. Moreover, the boundary part 13 of the cylinder part 11 and the flange part 12 protrudes inward, the recessed part 13a is formed in the outer surface of the boundary part 13, and the site | part protruded inward is the level | step-difference part 13b. Further, on the outer surface, a ring-shaped convex portion 13c that protrudes slightly outward in a ring shape is formed between the concave portion 13a and the cylindrical portion 11.

押さえ付け部材２０は、本実施形態では、Ｏリングからなり、継手本体１０の凹部１３ａに装着される。フランジ部１２を接続用開口１１２の内側に挿入すると、開口周縁部１１２ａが、フランジ部１２の外側に位置し、上記のように、フランジ部１２の筒部１１側に位置する外表面１２ａに接するが、該開口周縁部１１２ａが凹部１３ａの周囲に至るようにフランジ部１２の挿入量を調整する。その状態で、押さえ付け部材２０としてのＯリングを、該開口周縁部１１２ａを間に挟んで凹部１３ａに装着する。これにより、継手本体１０が、一方のダクト（親ダクト）１１０の周面部１１１に接続される（図４（ａ），（ｂ）参照）。   In this embodiment, the pressing member 20 is formed of an O-ring and is attached to the concave portion 13 a of the joint body 10. When the flange portion 12 is inserted inside the connection opening 112, the opening peripheral edge portion 112a is located outside the flange portion 12 and contacts the outer surface 12a located on the cylinder portion 11 side of the flange portion 12 as described above. However, the insertion amount of the flange portion 12 is adjusted so that the opening peripheral portion 112a reaches the periphery of the recess 13a. In this state, an O-ring as the pressing member 20 is mounted in the recess 13a with the opening peripheral edge 112a interposed therebetween. Thereby, the coupling main body 10 is connected to the peripheral surface portion 111 of one duct (parent duct) 110 (see FIGS. 4A and 4B).

筒部１１は、上記のように、接続対象の他方のダクト（子ダクト）１２０を接続できる直径の筒状に形成されており、また、ゴム等の弾性素材から形成されている。そのため、該筒部１１を縮径するように保持して、他方のダクト（子ダクト）１２０にその開口端１２０ａから押し込んだ後、縮径させていた外力を解除すると、復元力の作用と筒部１１の表面の摩擦力によって該他方のダクト（子ダクト）１２０を接続することができる。しかしながら、この場合には、筒部１１を作業者が手等で縮径状態で所定時間保持しなければならないなど、作業効率の点で課題がある。そこで、本実施形態のように、接続管３０を用いることが好ましい。   As described above, the cylindrical portion 11 is formed in a cylindrical shape having a diameter capable of connecting the other duct (child duct) 120 to be connected, and is formed from an elastic material such as rubber. Therefore, when the cylindrical portion 11 is held so as to be reduced in diameter and pushed into the other duct (child duct) 120 from the opening end 120a and then the reduced external force is released, the action of the restoring force and the cylinder The other duct (child duct) 120 can be connected by the frictional force of the surface of the portion 11. However, in this case, there is a problem in terms of work efficiency, for example, the operator must hold the cylinder portion 11 in a reduced diameter state with a hand or the like for a predetermined time. Therefore, it is preferable to use the connecting pipe 30 as in this embodiment.

接続管３０は、硬質素材からなる筒状部材であり、他方のダクト（子ダクト）１２０の開口端１２０ａから挿入し、該他方のダクト(子ダクト)１２０を外面側に保持した状態で、一緒に筒部１１内に挿入し、筒部１１と接続するものである（図４（ａ），（ｂ）参照）。硬質素材からなるため、柔軟な他方のダクト（子ダクト）１２０の形状を保持するガイドとして機能し、筒部１１への挿入を容易にする。   The connecting pipe 30 is a cylindrical member made of a hard material, and is inserted from the opening end 120a of the other duct (child duct) 120, and the other duct (child duct) 120 is held together on the outer surface side. It inserts in the cylinder part 11, and connects with the cylinder part 11 (refer Fig.4 (a), (b)). Since it is made of a hard material, it functions as a guide for maintaining the shape of the other flexible duct (child duct) 120 and facilitates insertion into the cylindrical portion 11.

硬質素材からなる接続管３０としては、金属から形成することも可能であるが、軽量化の点から硬質の合成樹脂から形成したものが好ましい。接続管３０は、外径が筒部１１の内径とほぼ同じか、若干大きめに形成されている。好ましくは、接続管３０の外面側に他方のダクト（子ダクト）１２０を配置した状態で、すなわち、接続管３０の外径に、他方のダクト（子ダクト）を構成するプラスチックフィルムの厚みが付加された状態で、接続管３０内に挿入した際に、若干きつめとなる程度の外径で形成される。より具体的には、接続管３０の外径は、継手本体１０の素材や弾性にもよるが、筒部１１の内径に対して、９５〜１１０％程度であることが好ましい。なお、接続管３０は、他方のダクト（子ダクト）１２０の開口端１２０ａから挿入されて使用されるものであるため、他方のダクト（子ダクト）１２０の内径よりも小さな外径のものが選択される。   The connecting pipe 30 made of a hard material can be made of metal, but is preferably made of a hard synthetic resin in terms of weight reduction. The connecting pipe 30 has an outer diameter that is substantially the same as or slightly larger than the inner diameter of the cylindrical portion 11. Preferably, the thickness of the plastic film constituting the other duct (child duct) is added to the outer diameter of the connecting pipe 30 in a state where the other duct (child duct) 120 is arranged on the outer surface side of the connecting pipe 30. In this state, the outer diameter is slightly tight when inserted into the connecting pipe 30. More specifically, the outer diameter of the connecting pipe 30 is preferably about 95 to 110% with respect to the inner diameter of the cylindrical portion 11, although it depends on the material and elasticity of the joint body 10. The connecting pipe 30 is used by being inserted from the opening end 120a of the other duct (child duct) 120, so that the outer diameter smaller than the inner diameter of the other duct (child duct) 120 is selected. Is done.

接続管３０の長さは制限されるものではないが、他方のダクト（子ダクト）１２０を筒部１１に装着するガイドとしての機能を果たせばよく、また、長すぎると取り扱いにくいことから、筒部１１の長さとほぼ同じか、長くてもその３倍以内であることが好ましく、通常、５〜２０ｃｍ程度とすることができる。   Although the length of the connecting pipe 30 is not limited, it is only necessary to perform a function as a guide for mounting the other duct (child duct) 120 to the cylindrical portion 11, and if it is too long, it is difficult to handle. It is preferably about the same as the length of the portion 11 or within 3 times the length of the portion 11 and can usually be about 5 to 20 cm.

次に、本実施形態のダクト用継手構造１を用いたダクトの接続方法を説明する。まず、一方のダクト（親ダクト）１１０に接続する他方のダクト（子ダクト）１２０の直径に適合する筒部１１を備えた継手本体１０を選択する。次に、図３に示したように、一方のダクト（親ダクト）１１０の周面部１１１の所望の位置に、所定径の接続用開口１１２を開口する。この場合、接続対象の他方のダクト（子ダクト）１２０の直径に適合する筒部１１を備えた継手本体１０を選択すると、そのフランジ部１２よりも小さな直径の接続用開口１１２を開口するための所定径の円盤形のテンプレート(図示せず)が、継手本体１０等と共に、ダクト用継手構造１としてセットで提供されるようにしておくと好ましい。それにより、このテンプレートの外周に沿って切り込みを入れることで、所定の直径の接続用開口１１２を容易に形成できる。   Next, a duct connecting method using the duct joint structure 1 of the present embodiment will be described. First, the joint body 10 including the cylindrical portion 11 that matches the diameter of the other duct (child duct) 120 connected to the one duct (parent duct) 110 is selected. Next, as shown in FIG. 3, a connection opening 112 having a predetermined diameter is opened at a desired position on the peripheral surface portion 111 of one duct (parent duct) 110. In this case, when the joint body 10 having the cylindrical portion 11 that matches the diameter of the other duct (child duct) 120 to be connected is selected, a connection opening 112 having a smaller diameter than the flange portion 12 is opened. It is preferable that a disk-shaped template (not shown) with a predetermined diameter is provided as a set as the duct joint structure 1 together with the joint body 10 and the like. Thereby, the opening 112 for connection of a predetermined diameter can be easily formed by notching along the outer periphery of this template.

次に、図３に示したように、継手本体１０を、フランジ部１２付近を中心として縮径ないしは押しつぶすように変形させる外力を加え、上記の接続用開口１１２から一方のダクト（親ダクト）１１０内に挿入する。そして、開口周縁部１１２ａが筒部１１とフランジ部１２の境界部１３の凹部１３ａの周囲に至るようにフランジ部１２の挿入量を調整する。その後、上記の外力を解除すると、フランジ部１２を含む継手本体１０が原形状に復元するため、接続用開口１１２が押し広げられた状態が維持される。   Next, as shown in FIG. 3, an external force that deforms the joint body 10 so as to reduce or crush the joint body 10 around the flange portion 12 is applied, and one duct (parent duct) 110 is connected from the connection opening 112. Insert inside. And the insertion amount of the flange part 12 is adjusted so that the opening peripheral part 112a may reach the circumference | surroundings of the recessed part 13a of the boundary part 13 of the cylinder part 11 and the flange part 12. FIG. Thereafter, when the external force is released, the joint body 10 including the flange portion 12 is restored to the original shape, so that the state in which the connection opening 112 is expanded is maintained.

次に、図４（ａ），（ｂ）に示したように、押さえ付け部材２０としてのＯリングを、開口周縁部１１２ａを間に挟んで凹部１３ａに装着する。これにより、開口周縁部１１２ａが凹部１３ａに密接した状態で、継手本体１０が、一方のダクト（親ダクト）１１０の周面部１１１に接続される。なお、本実施形態の継手本体１０は、凹部１３ａと筒部１１との間にリング状凸部１３ｃを備えているため、リング状凸部１３ｃが押さえ付け部材２０のずれ防止に役立つ。   Next, as shown in FIGS. 4A and 4B, an O-ring as the pressing member 20 is mounted in the recess 13a with the opening peripheral edge 112a interposed therebetween. Thereby, the joint main body 10 is connected to the peripheral surface portion 111 of one duct (parent duct) 110 in a state where the opening peripheral edge portion 112a is in close contact with the concave portion 13a. In addition, since the joint main body 10 of this embodiment is provided with the ring-shaped convex part 13c between the recessed part 13a and the cylinder part 11, the ring-shaped convex part 13c is useful for prevention of deviation | shift of the pressing member 20. FIG.

次に、他方のダクト（子ダクト）１２０の開口端１２０ａから、その内部に接続管３０を挿入し、該開口端１２０ａを接続管３０の先端側から内側に折り返し、その状態で、筒部１１内に挿入する（図４（ａ），（ｂ）参照）。接続管３０が硬質素材からなるため、挿入時のガイドとして機能し、柔軟なプラスチックフィルム製の他方のダクト（子ダクト）１２０を筒部１１内に容易に挿入することができる。他方のダクト（子ダクト）１２０は、接続管３０と共に挿入されることにより、筒部１１が多少押し広げられることになるため、筒部１１の復元力が接続管３０の外周面に向かって作用し、両者間に他方のダクト（子ダクト）１２０が挟まれた状態で容易に接続することができる。なお、筒部１１内には、凹部１３ａに対向する位置に内方に突出する段差部１３ｂが設けられているため、挿入された接続管３０はこの段差部１３ｂに当接するとそれ以上の挿入が阻止される。すなわち、段差部１３ｂは、接続管３０を押し込み過ぎを防止し、継手本体１０内の適切な位置で保持する機能を果たす。   Next, the connecting pipe 30 is inserted into the inside from the opening end 120a of the other duct (child duct) 120, and the opening end 120a is folded inward from the distal end side of the connecting pipe 30. (See FIGS. 4A and 4B). Since the connecting pipe 30 is made of a hard material, it functions as a guide for insertion, and the other duct (child duct) 120 made of a flexible plastic film can be easily inserted into the cylindrical portion 11. When the other duct (child duct) 120 is inserted together with the connecting pipe 30, the cylindrical portion 11 is somewhat pushed and widened, so that the restoring force of the cylindrical portion 11 acts toward the outer peripheral surface of the connecting pipe 30. Then, the other duct (child duct) 120 can be easily connected between the two. In addition, since the step part 13b which protrudes inward is provided in the position which opposes the recessed part 13a in the cylinder part 11, if the inserted connecting pipe 30 contact | abuts to this step part 13b, it will be inserted further. Is blocked. In other words, the step portion 13 b serves to prevent the connecting pipe 30 from being pushed too much and hold it at an appropriate position in the joint body 10.

本実施形態によれば、ダクト用継手構造１を構成する継手本体１０がゴム等の弾性素材から形成されているため、その弾性力（復元力）を利用して、一方のダクト（親ダクト）１１０と他方のダクト（子ダクト）１２０との接続作業を容易に行うことができる。また、一方のダクト（親ダクト）１１０は、継手本体１０のうち、境界部１３付近において押さえ付け部材２０との間に挟まれ、他方のダクト（子ダクト）１２０は、筒部１１内において接続管３０との間に挟まれることによって接続されるが、いずれにしても継手本体１０の弾性力（復元力）の作用で挟まれた状態が維持されるものである。そのため、所定期間使用後の点検時等に、例えば、継手本体１０を取り外した後付け直す場合においても、プラスチックフィルムからなる各ダクト１１０，１２０のうち、継手本体１０との間に挟まれていた部位に伸び等の変形が生じることを抑制でき、各ダクト１１０，１２０の長寿命化に寄与できる。   According to the present embodiment, since the joint body 10 constituting the duct joint structure 1 is formed of an elastic material such as rubber, one of the ducts (parent duct) is utilized by utilizing its elastic force (restoring force). 110 and the other duct (child duct) 120 can be easily connected. Further, one duct (parent duct) 110 is sandwiched between the joint body 10 and the pressing member 20 in the vicinity of the boundary portion 13, and the other duct (child duct) 120 is connected within the cylindrical portion 11. Although it is connected by being pinched between the pipes 30, in any case, the pinched state is maintained by the action of the elastic force (restoring force) of the joint body 10. Therefore, at the time of inspection after use for a predetermined period, for example, when removing and reattaching the joint body 10, the part sandwiched between the joint body 10 among the ducts 110 and 120 made of a plastic film. It is possible to suppress the occurrence of deformation such as elongation, and to contribute to the extension of the service life of the ducts 110 and 120.

なお、上記実施形態では、継手本体１０を構成する筒部１１及びフランジ部１２の外形を円形に形成している。取り扱いやすさ等を考慮すると円形が好ましいが、必ずしもこれに限定されるものではなく、楕円形やその他の多角形等であってもよい。また、筒部１１の外面に凹部１３ａ、リング状凸部１３ｃを設けているが、押さえ付け部材２０が位置ずれしないように保持できる限り、これらは必ずしも設けなくてもよい。   In the above-described embodiment, the outer shape of the cylindrical portion 11 and the flange portion 12 constituting the joint body 10 is formed in a circular shape. In consideration of ease of handling and the like, a circular shape is preferable. However, the shape is not necessarily limited thereto, and may be an elliptical shape or other polygonal shapes. Moreover, although the recessed part 13a and the ring-shaped convex part 13c are provided in the outer surface of the cylinder part 11, as long as it can hold | maintain so that the pressing member 20 may not position-shift, these do not necessarily need to provide.

１ ダクト用継手構造
１０ 継手本体
１１ 筒部
１２ フランジ部
１３ 境界部
１３ａ 凹部
２０ 押さえ付け部材
３０ 接続管
１１０ 一方のダクト（親ダクト）
１１１ 周面部
１１２ 接続用開口
１２０ 他方のダクト（子ダクト） DESCRIPTION OF SYMBOLS 1 Joint structure for ducts 10 Joint body 11 Cylinder part 12 Flange part 13 Boundary part 13a Concave part 20 Holding member 30 Connection pipe 110 One duct (parent duct)
111 Peripheral surface 112 Opening for connection 120 Duct on the other side (child duct)

Claims (7)

プラスチックフィルム製の一方のダクトの周面部に、プラスチックフィルム製の他方のダクトを略Ｔ字状に接続するためのダクト用継手構造であって、
弾性素材からなり、前記他方のダクトに連結される筒部と、前記一方のダクトの周面部に設けられた接続用開口よりも大きな外径で、前記筒部の一端に外方に突出するように設けられ、前記一方のダクトに連結されるフランジ部とを備えた継手本体と、
前記フランジ部を、前記接続用開口から前記一方のダクトの前記周面部の内側に挿入した状態で、前記接続用開口の周囲に位置する開口周縁部を、前記継手本体に押さえ付ける押さえ付け部材と
を有することを特徴とするダクト用継手構造。 A duct joint structure for connecting the other duct made of plastic film in a substantially T-shape to the peripheral surface portion of one duct made of plastic film,
It is made of an elastic material, and has a cylindrical portion connected to the other duct and an outer diameter larger than a connection opening provided in a peripheral surface portion of the one duct, and protrudes outward from one end of the cylindrical portion. And a joint body provided with a flange portion connected to the one duct,
A pressing member that presses the peripheral edge of the opening positioned around the opening for connection to the joint body in a state where the flange is inserted from the connection opening to the inside of the peripheral surface of the one duct; A duct joint structure characterized by comprising: 前記継手本体の前記筒部内に挿入される、硬質素材からなる接続管をさらに有し、
前記他方のダクトが、その開口端から前記接続管を挿入した状態で、前記筒部内に挿入されて連結される請求項１記載のダクト用継手構造。 It further has a connecting pipe made of a hard material, which is inserted into the tube part of the joint body,
The joint structure for a duct according to claim 1, wherein the other duct is inserted into the cylindrical portion and connected in a state where the connection pipe is inserted from an opening end thereof. 前記継手本体を構成する弾性素材が、ゴムである請求項１又は２記載のダクト用継手構造。   The duct joint structure according to claim 1 or 2, wherein the elastic material constituting the joint body is rubber. 前記各ダクトが、温室に配設され、気体の流路を形成しているものである請求項１〜３のいずれか１に記載のダクト用継手構造。   The joint structure for a duct according to any one of claims 1 to 3, wherein each of the ducts is disposed in a greenhouse and forms a gas flow path. プラスチックフィルム製の一方のダクトの周面部に、プラスチックフィルム製の他方のダクトを略Ｔ字状に接続するためのダクトの接続方法であって、
弾性素材からなり、筒部と、前記筒部の一端に設けられ、外方に突出しているフランジ部とを有する継手本体を用い、
前記一方のダクトの周面部に、前記フランジ部の外径よりも小さな接続用開口を形成する工程と、
前記接続用開口から前記フランジ部を前記一方のダクトの周面部の内側に挿入する工程と、
前記接続用開口の周囲に位置する開口周縁部を、前記継手本体に押さえ付け部材を用いて押さえ付ける工程と、
前記他方のダクトを前記筒部に連結する工程と
を有することを特徴とするダクトの接続方法。 A duct connecting method for connecting the other duct made of plastic film in a substantially T-shape to the peripheral surface portion of one duct made of plastic film,
Made of an elastic material, using a joint body having a tubular portion and a flange portion provided at one end of the tubular portion and projecting outward,
Forming a connection opening smaller than the outer diameter of the flange on the peripheral surface of the one duct;
Inserting the flange portion into the inside of the peripheral surface portion of the one duct from the connection opening;
The step of pressing the opening peripheral edge located around the connection opening to the joint body using a pressing member;
Connecting the other duct to the cylindrical portion. A method for connecting ducts. 前記他方のダクトを前記筒部に連結する工程では、硬質素材からなる接続管を、前記他方のダクトの開口端から挿入し、前記他方のダクトを前記接続管と共にに、前記筒部内に挿入して連結する請求項５記載のダクトの接続方法。   In the step of connecting the other duct to the cylindrical portion, a connecting pipe made of a hard material is inserted from the opening end of the other duct, and the other duct is inserted into the cylindrical portion together with the connecting pipe. The duct connecting method according to claim 5, wherein the ducts are connected together. 温室に配設され、気体の流路を形成するダクトの接続に用いられる請求項５又は６記載のダクトの接続方法。   The duct connection method according to claim 5 or 6, wherein the duct connection method is used for connecting a duct which is disposed in a greenhouse and forms a gas flow path.
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