JP6820557B2 - Square duct connection structure, connection method and square duct - Google Patents

Square duct connection structure, connection method and square duct Download PDF

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JP6820557B2
JP6820557B2 JP2017051098A JP2017051098A JP6820557B2 JP 6820557 B2 JP6820557 B2 JP 6820557B2 JP 2017051098 A JP2017051098 A JP 2017051098A JP 2017051098 A JP2017051098 A JP 2017051098A JP 6820557 B2 JP6820557 B2 JP 6820557B2
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square duct
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connected body
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JP2018155289A (en
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梶野　勇
勇 梶野
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株式会社新富士空調
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本発明は、角ダクトと他のダクトなどを接続するための角ダクト接続構造、接続方法および角ダクトに関する。 The present invention relates to a square duct connection structure, a connection method, and a square duct for connecting a square duct and another duct or the like.

従来、筒状で断面が略四角形のダクト本体の開口端部には、開口縁に沿って延びるフランジが設けられ、他のダクトなどと接続できるようになっている。すなわち、ダクト本体を構成する鋼板の端部を垂直に曲げて形成された共板フランジの場合、フランジ同士を面合わせして、フランジ押え金物（クリップ）でフランジ同士を挟持する。そして、フランジの角部に配設したコーナーピースおいてボルト締結することで、ダクト同士等を接続する（例えば、非特許文献１参照。）。 Conventionally, a flange extending along the opening edge is provided at the opening end of a duct body having a tubular shape and a substantially quadrangular cross section so that it can be connected to another duct or the like. That is, in the case of a common plate flange formed by vertically bending the end portion of a steel plate constituting the duct body, the flanges are face-to-face with each other and the flanges are sandwiched by a flange holding metal fitting (clip). Then, the ducts and the like are connected to each other by bolting the corner pieces arranged at the corners of the flange (see, for example, Non-Patent Document 1).

「標準ダクトテキスト」一般社団法人 全国ダクト工業団体連合会 編集発行、平成２５年７月、ｐ.３９〜ｐ.４０"Standard Duct Text" edited and published by the National Federation of Duct Industry Associations, July 2013, p.39-p.40

ところで、従来のダクト接続構造では、特殊工具を使用して対向する４組のフランジをそれぞれフランジ押え金物で挟持し、さらに、４つの角部にそれぞれ一対のコーナーピースを配設してスパナなどでボルト締結しなければならず、多大な時間と労力を要する。しかも、狭い場所や高い場所など作業が困難な場所では、作業者の負担が大きいばかりでなく、フランジ押え金物による挟持やコーナーピースでのボルト締結が不完全になるおそれがある。また、接続箇所が増えるほど、多くのフランジ押え金物やボルトなどを要し、コストが嵩んでいた。 By the way, in the conventional duct connection structure, four sets of flanges facing each other are sandwiched by flange holding hardware by using a special tool, and a pair of corner pieces are arranged at each of the four corners with a spanner or the like. It has to be bolted, which requires a lot of time and effort. Moreover, in a place where work is difficult such as a narrow place or a high place, not only the burden on the operator is heavy, but also there is a possibility that the flange holding metal fittings hold the bolts and the bolts are incompletely fastened with the corner pieces. In addition, as the number of connection points increases, more flange holding hardware and bolts are required, which increases the cost.

そこでこの発明は、容易に接続が可能で、しかも、コストを低減可能な角ダクトの接続構造、接続方法および角ダクトを提供することを目的とする。 Therefore, an object of the present invention is to provide a connection structure, a connection method, and a square duct of a square duct that can be easily connected and can reduce the cost.

上記目的を達成するために請求項１に記載の発明は、４つの側板部が略四角い筒状に配設されて端部に継手部を有する角ダクトと、前記継手部と同構造の継手部を有する被接続体と、を接続する角ダクトの接続構造であり、前記継手部は、前記各側板部の端部に設けられた接続部から構成され、前記接続部は、前記側板部の端部が前記側板部の板面と略平行に３つ折りされて、前記側板部側から順に下位接続部、中位接続部、上位接続部が設けられ、前記上位接続部の自由端が前記下位接続部と前記中位接続部との折り曲げ部よりも突出し、前記上位接続部に係止部と上位被係止部が設けられ、前記中位接続部に中位被係止部が設けられ、前記角ダクトの接続部の上位接続部を前記被接続体の接続部の上位接続部と中位接続部の間に嵌入させると、前記角ダクトの係止部が前記被接続体の中位被係止部に係止して、前記被接続体の係止部が前記角ダクトの上位被係止部に係止し、または、前記被接続体の接続部の上位接続部を前記角ダクトの接続部の上位接続部と中位接続部の間に嵌入させると、前記被接続体の係止部が前記角ダクトの中位被係止部に係止して、前記角ダクトの係止部が前記被接続体の上位被係止部に係止して、前記角ダクトと前記被接続体とが接続される、ことを特徴とする。 In order to achieve the above object, the invention according to claim 1 is a square duct in which four side plate portions are arranged in a substantially square tubular shape and have a joint portion at an end, and a joint portion having the same structure as the joint portion. It is a connection structure of a square duct connecting the connected body having the above, the joint portion is composed of the connection portion provided at the end portion of each side plate portion, and the connection portion is the end of the side plate portion. The portion is folded in three substantially parallel to the plate surface of the side plate portion, and the lower connection portion, the middle connection portion, and the upper connection portion are provided in order from the side plate portion side, and the free end of the upper connection portion is the lower connection portion. A locking portion and an upper locked portion are provided on the upper connecting portion, and a intermediate locked portion is provided on the middle connecting portion, which protrudes from the bent portion between the portion and the intermediate connecting portion. When the upper connection portion of the connection portion of the square duct is fitted between the upper connection portion and the middle connection portion of the connection portion of the connected body, the locking portion of the square duct is engaged with the middle of the connected body. The locking portion of the connected body is locked to the upper locked portion of the square duct, or the upper connecting portion of the connecting portion of the connected body is connected to the square duct. When it is fitted between the upper connection portion and the middle connection portion of the portion, the locking portion of the connected body is locked to the middle locked portion of the square duct, and the locking portion of the square duct is engaged. It is characterized in that the square duct and the connected body are connected by locking to the upper locked portion of the connected body.

請求項２に記載の発明は、請求項１に記載のダ角ダクトの接続構造において、前記折り曲げ部にパッキンが設けられ、前記角ダクトの接続部の上位接続部を前記被接続体の接続部の上位接続部と中位接続部の間に嵌入、または、前記被接続体の接続部の上位接続部を前記角ダクトの接続部の上位接続部と中位接続部の間に嵌入させた際に、前記角ダクトのパッキンと前記被接続体のパッキンが当接する、ことを特徴とする。 According to the second aspect of the present invention, in the connection structure of the square duct according to the first aspect, a packing is provided at the bent portion, and the upper connecting portion of the connecting portion of the square duct is connected to the connecting portion of the connected body. When it is fitted between the upper connection part and the middle connection part of the above, or when the upper connection part of the connection part of the connected body is fitted between the upper connection part and the middle connection part of the connection part of the square duct. In addition, the packing of the square duct and the packing of the connected body come into contact with each other.

請求項３に記載の発明は、請求項１または２に記載の角ダクトの接続構造造において、前記角ダクトと前記被接続体とが接続された状態で、前記角ダクトと前記被接続体の継手部の角部を連結する連結体を備える、ことを特徴とする。 The invention according to claim 3 relates to the square duct and the connected body in a state where the square duct and the connected body are connected in the connection structure structure of the square duct according to claim 1 or 2. It is characterized by including a connecting body for connecting the corners of the joint portion.

請求項４に記載の発明は、請求項３に記載の角ダクトの接続構造において、前記連結体は、略Ｌ字状体で、断面が略Ｃ字状で真っ直ぐ延びる第１の連結部と、断面が略Ｃ字状で前記第１の連結部の一端から略直角に延びてＣ字の両端部が開閉自在な第２の連結部と、を有し、前記第１の連結部と前記第２の連結部のＣ字の開口がＬ字の内側を向き、前記角ダクトの接続部の１つである第１の接続部と、該第１の接続部と嵌入関係にある前記被接続体の接続部である第１の接続部とが重なった第１の重なり部の端縁から、前記第１の連結部のＣ字内に前記第１の重なり部の端部側を嵌入し、前記角ダクトの第１の接続部と隣接する接続部である第２の接続部と、該第２の接続部と嵌入関係にある前記被接続体の接続部である第２の接続部とが重なった第２の重なり部の端部側に、前記第２の連結部を位置させてＣ字の両端部を閉じ、前記第２の連結部のＣ字内に前記第２の重なり部の端部側を嵌入することで、前記継手部の角部を連結する、ことを特徴徴とする。 The invention according to claim 4 relates to a first connecting portion having a substantially L-shaped cross section and a substantially C-shaped cross section extending straight in the connection structure of the square duct according to claim 3. It has a second connecting portion having a substantially C-shaped cross section and extending substantially at right angles from one end of the first connecting portion, and both ends of the C-shape can be opened and closed. The first connecting portion and the first connecting portion. The C-shaped opening of the connecting portion 2 faces the inside of the L-shape, and the first connecting portion, which is one of the connecting portions of the square duct, and the connected body having a fitting relationship with the first connecting portion. From the edge of the first overlapping portion that overlaps with the first connecting portion, which is the connecting portion of the first connecting portion, the end side of the first overlapping portion is fitted into the C-shape of the first connecting portion. The second connection portion, which is a connection portion adjacent to the first connection portion of the square duct, and the second connection portion, which is a connection portion of the connected body having a fitting relationship with the second connection portion, overlap with each other. The second connecting portion is positioned on the end side of the second overlapping portion to close both ends of the C-shape, and the end portion of the second overlapping portion is inside the C-shape of the second connecting portion. It is characterized in that the corners of the joint portion are connected by fitting the side.

請求項５に記載の発明は、請求項１から４に記載の角ダクトの接続構造において、断面がＵ字状または逆Ｕ凹状の補強リブが、前記接続部の上位接続部に設けられ、前記角ダクトの接続部の上位接続部を前記被接続体の接続部の上位接続部と中位接続部の間に嵌入、または、前記被接続体の接続部の上位接続部を前記角ダクトの接続部の上位接続部と中位接続部の間に嵌入させた際に、前記角ダクトの補強リブと前記被接続体の補強リブとが重なる、ことを特徴とする。 According to a fifth aspect of the present invention, in the connection structure of the square duct according to the first to fourth aspects, a reinforcing rib having a U-shaped cross section or an inverted U concave shape is provided in the upper connecting portion of the connecting portion. The upper connection part of the connection part of the square duct is fitted between the upper connection part and the middle connection part of the connection part of the connected body, or the upper connection part of the connection part of the connected body is connected to the square duct. It is characterized in that the reinforcing ribs of the square duct and the reinforcing ribs of the connected body overlap when they are fitted between the upper connecting portion and the middle connecting portion of the portion.

請求項６に記載の発明は、４つの側板部が略四角い筒状に配設されて端部に継手部を有する角ダクトと、前記継手部と同構造の継手部を有する被接続体と、を接続する角ダクトの接続方法であり、前記継手部は、前記各側板部の端部に設けられた接続部から構成され、前記接続部は、前記側板部の端部が前記側板部の板面と略平行に３つ折りされて、前記側板部側から順に下位接続部、中位接続部、上位接続部が設けられ、前記上位接続部の自由端が前記下位接続部と前記中位接続部との折り曲げ部よりも突出し、前記上位接続部に係止部と上位被係止部が設けられ、前記中位接続部に中位被係止部が設けられ、前記角ダクトの接続部の上位接続部を前記被接続体の接続部の上位接続部と中位接続部の間に嵌入して、前記角ダクトの係止部を前記被接続体の中位被係止部に係止させ、前記被接続体の係止部を前記角ダクトの上位被係止部に係止させ、または、前記被接続体の接続部の上位接続部を前記角ダクトの接続部の上位接続部と中位接続部の間に嵌入して、前記被接続体の係止部を前記角ダクトの中位被係止部に係止させ、前記角ダクトの係止部を前記被接続体の上位被係止部に係止させて、前記角ダクトと前記被接続体とを接続する、ことを特徴とする。 The invention according to claim 6 comprises a square duct in which four side plate portions are arranged in a substantially square tubular shape and have a joint portion at an end, and a connected body having a joint portion having the same structure as the joint portion. It is a connection method of a square duct for connecting the above, the joint portion is composed of a connection portion provided at an end portion of each side plate portion, and the end portion of the side plate portion of the connection portion is a plate of the side plate portion. Folded in three substantially parallel to the surface, a lower connection portion, a middle connection portion, and an upper connection portion are provided in order from the side plate portion side, and the free end of the upper connection portion is the lower connection portion and the middle connection portion. A locking portion and an upper locked portion are provided in the upper connecting portion, a middle locked portion is provided in the middle connecting portion, and the upper part of the connecting portion of the square duct is provided. The connecting portion is fitted between the upper connecting portion and the intermediate connecting portion of the connecting portion of the connected body, and the locking portion of the square duct is locked to the intermediate locked portion of the connected body. The locking portion of the connected body is locked to the upper locked portion of the square duct, or the upper connecting portion of the connecting portion of the connected body is intermediate with the upper connecting portion of the connecting portion of the square duct. It is fitted between the connecting portions to lock the locking portion of the connected body to the middle locked portion of the square duct, and the locking portion of the square duct is locked to the upper side of the connected body. It is characterized in that the square duct and the connected body are connected by being locked to a portion .

請求項７に記載の発明は、４つの側板部が略四角い筒状に配設されて端部に継手部を有する角ダクトであって、前記継手部は、前記各側板部の端部に設けられた接続部から構成され、前記接続部は、前記側板部の端部が前記側板部の板面と略平行に３つ折りされて、前記側板部側から順に下位接続部、中位接続部、上位接続部が設けられ、前記上位接続部の自由端が前記下位接続部と前記中位接続部との折り曲げ部よりも突出し、前記上位接続部に係止部と上位被係止部が設けられ、前記中位接続部に中位被係止部が設けられ、前記継手部と同構造の継手部を有する被接続体に対して、前記角ダクトの接続部の上位接続部を前記被接続体の接続部の上位接続部と中位接続部の間に嵌入して、前記角ダクトの係止部を前記被接続体の中位被係止部に係止させ、前記被接続体の係止部を前記角ダクトの上位被係止部に係止させ、または、前記被接続体の接続部の上位接続部を前記角ダクトの接続部の上位接続部と中位接続部の間に嵌入して、前記被接続体の係止部を前記角ダクトの中位被係止部に係止させ、前記角ダクトの係止部を前記被接続体の上位被係止部に係止させることで、前記角ダクトと前記被接続体とが接続される、ことを特徴とする。 The invention according to claim 7 is a square duct in which four side plate portions are arranged in a substantially square tubular shape and have joint portions at the ends, and the joint portions are provided at the end portions of the side plate portions. The connection portion is composed of the connection portions, the end portion of the side plate portion is folded in three substantially parallel to the plate surface of the side plate portion, and the lower connection portion, the middle connection portion, and the middle connection portion are arranged in order from the side plate portion side. An upper connection portion is provided, the free end of the upper connection portion protrudes from a bent portion between the lower connection portion and the middle connection portion, and a locking portion and an upper locked portion are provided on the upper connection portion. , The intermediate locked portion is provided in the intermediate connecting portion, and the upper connecting portion of the connecting portion of the square duct is connected to the connected body having the joint portion having the same structure as the joint portion. It is fitted between the upper connection portion and the middle connection portion of the connection portion of the above, and the locking portion of the square duct is locked to the middle locked portion of the connected body, and the connected body is locked. part was the locked to the upper engaged portion of the angle duct, or by fitting the upper connecting portion of the connecting portion of the object to be connected between the upper connecting portion and the middle connecting portion of the connecting portion of the angle duct Te, wherein the engaging portion of the object to be connected to engage with the middle engaged portion of the angle duct, by engaging the engaging portion of the angle duct to the upper engaged portion of the object to be connected , The square duct and the connected body are connected to each other.

請求項１、請求項６および請求項７に記載の発明によれば、角ダクトの接続部の上位接続部を被接続体の接続部の上位接続部と中位接続部の間に嵌入させ、あるいは、被接続体の接続部の上位接続部を角ダクトの接続部の上位接続部と中位接続部の間に嵌入させるだけで、角ダクトと被接続体とが接続される。このため、角ダクトと被接続体を容易かつ短時間で接続することが可能となり、また、狭い場所や高い場所などでも、作業者に大きな負担を与えることなく適正に接続することが可能となる。しかも、工具を要しないため、安全かつ容易な作業が可能となる。さらに、多くのフランジ押え金物やボルトなどを要しないため、コストを低減することが可能となる。しかも、従来のフランジが側板部に対して垂直に突出しているのに対して、接続部が側板部の板面と略平行なため、スリムで良好な外観が得られるとともに、設置スペースや搬送スペースを軽減することが可能となり、さらには、搬送時などに接続部が変形したりするのが抑制される。 According to the inventions of claims 1, 6 and 7 , the upper connection portion of the connection portion of the square duct is fitted between the upper connection portion and the middle connection portion of the connection portion of the connected body. Alternatively, the square duct and the connected body are connected by simply fitting the upper connecting portion of the connecting portion of the connected body between the upper connecting portion and the intermediate connecting portion of the connecting portion of the square duct. For this reason, it is possible to easily and quickly connect the square duct and the connected body, and it is possible to properly connect the square duct and the connected body even in a narrow place or a high place without imposing a heavy burden on the operator. .. Moreover, since no tools are required, safe and easy work is possible. Further, since many flange holding hardware and bolts are not required, the cost can be reduced. Moreover, while the conventional flange projects perpendicular to the side plate, the connection is almost parallel to the plate surface of the side plate, so a slim and good appearance can be obtained, and the installation space and transport space can be obtained. Further, it is possible to prevent the connection portion from being deformed during transportation or the like.

また、角ダクトの４つの接続部のうち、ある接続部においては、その上位接続部を被接続体の接続部の上位接続部と中位接続部の間に嵌入させ、別の接続部においては、その上位接続部と中位接続部の間に被接続体の接続部の上位接続部を嵌入させてもよい。つまり、角ダクトと被接続体のどちらの上位接続部を嵌入させるかは問わず、嵌入させればよいため、作業者はどちらを嵌入させるかを気にする必要がなく、より容易かつ短時間で接続することが可能となる。 Further, among the four connection portions of the square duct, in one connection portion, the upper connection portion is fitted between the upper connection portion and the middle connection portion of the connection portion of the connected body, and in another connection portion, the upper connection portion is fitted. , The upper connection portion of the connection portion of the connected body may be fitted between the upper connection portion and the middle connection portion. In other words, it does not matter whether the upper connection part of the square duct or the connected body is fitted, so that the operator does not have to worry about which one to fit, and it is easier and shorter time. It is possible to connect with.

請求項２に記載の発明によれば、例えば、角ダクトの接続部の上位接続部を被接続体の接続部の上位接続部と中位接続部の間に嵌入させて、角ダクトと被接続体とが接続されると、角ダクトのパッキンと被接続体のパッキンが当接するため、角ダクトの接続部と被接続体の接続部とがパッキンで気密される。このため、角ダクトと被接続体とを接続した後に気密処理・シーリングを施す必要がなく、施工作業の迅速化、適正化を図ることが可能となる。 According to the second aspect of the present invention, for example, the upper connection portion of the connection portion of the square duct is fitted between the upper connection portion and the middle connection portion of the connection portion of the connected body to be connected to the square duct. When the body is connected, the packing of the square duct and the packing of the connected body come into contact with each other, so that the connecting portion of the square duct and the connecting portion of the connected body are airtight with the packing. Therefore, it is not necessary to perform airtight treatment / sealing after connecting the square duct and the connected body, and it is possible to speed up and optimize the construction work.

請求項３に記載の発明によれば、角ダクトと被接続体とが接続された状態で、角ダクトと被接続体の継手部の角部が連結体で連結されるため、角ダクトと被接続体との接続を強固に維持することが可能となる。 According to the third aspect of the present invention, in a state where the square duct and the connected body are connected, the corner portion of the joint portion between the square duct and the connected body is connected by the connecting body, so that the square duct and the connected body are connected. It is possible to maintain a strong connection with the connecting body.

請求項４に記載の発明によれば、連結体の第１の連結部のＣ字内に、角ダクトと被接続体の第１の重なり部の端部側を嵌入し、角ダクトと被接続体の第２の重なり部の端部側に連結体の第２の連結部を位置させ、Ｃ字の両端部を閉じて第２の重なり部の端部側を嵌入するだけで、容易かつ適正に継手部の角部を連結することができる。しかも、工具を要しないため、安全かつ容易な作業が可能となる。 According to the fourth aspect of the present invention, the end side of the first overlapping portion of the square duct and the connected body is fitted into the C-shape of the first connecting portion of the connecting body to be connected to the square duct. It is easy and appropriate to position the second connecting part of the connecting body on the end side of the second overlapping part of the body, close both ends of the C-shape, and insert the end side of the second overlapping part. The corners of the joint can be connected to. Moreover, since no tools are required, safe and easy work is possible.

また、請求項１、請求項６および請求項７に記載の発明によれば、角ダクトと被接続体とが接続されると、角ダクトの係止部が被接続体の中位被係止部に係止して、被接続体の係止部が角ダクトの上位被係止部に係止した状態、あるいは、被接続体の係止部が角ダクトの中位被係止部に係止して、角ダクトの係止部が被接続体の上位被係止部に係止した状態となる。このため、角ダクトと被接続体が離れることが防止、抑制され、適正かつ強固に接続することが可能になるとともに、連結体の取り付けなどを容易に行うことが可能となる。 Further , according to the inventions of claims 1, 6 and 7 , when the square duct and the connected body are connected, the locking portion of the square duct is intermediately locked to the connected body. A state in which the locked portion of the connected body is locked to the upper locked portion of the square duct, or the locked portion of the connected body is engaged to the middle locked portion of the square duct. When stopped, the locking portion of the square duct is locked to the upper locked portion of the connected body. For this reason, it is possible to prevent and suppress the separation of the square duct and the connected body, enable proper and firm connection, and easily attach the connecting body.

請求項５に記載の発明によれば、角ダクトと被接続体の接続部に補強リブが設けられているため、接続部が強固となり、角ダクトと被接続体を適正かつ強固に接続することが可能となる。しかも、角ダクトと被接続体とが接続されると、角ダクトの補強リブと被接続体の補強リブとが重なるため、より適正かつ強固に接続することが可能となる。 According to the invention of claim 5 , since the connecting portion between the square duct and the connected body is provided with the reinforcing rib, the connecting portion is strengthened, and the square duct and the connected body are properly and firmly connected. Is possible. Moreover, when the square duct and the connected body are connected, the reinforcing ribs of the square duct and the reinforcing ribs of the connected body overlap each other, so that the connection can be made more appropriately and firmly.

この発明の実施の形態に係る角ダクトを示す斜視図である。It is a perspective view which shows the square duct which concerns on embodiment of this invention. 図１の角ダクト同士を接続する前の状態を示す正面図である。It is a front view which shows the state before connecting the square ducts of FIG. 図１の角ダクト同士を接続した状態を示す正面図である。It is a front view which shows the state which connected the square ducts of FIG. 図１の角ダクトの接合部を示す図であり、（ａ）は角ダクトを展開した状態を示し、（ｂ）は角ダクトを閉じた状態を示す。It is a figure which shows the joint part of the square duct of FIG. 1, (a) shows the state which the square duct is expanded, and (b) shows the state which the square duct is closed. 図１の角ダクトを折り畳んだ状態を示す図である。It is a figure which shows the state which the square duct of FIG. 1 is folded. 図１の角ダクトの接続部を示す断面図である。It is sectional drawing which shows the connection part of the square duct of FIG. 図６の接続部同士を接続した状態を示す断面図（図１２のＤ１−Ｄ１断面図）である。6 is a cross-sectional view (D1-D1 cross-sectional view of FIG. 12) showing a state in which the connection portions of FIG. 6 are connected to each other. この発明の実施の形態に係る角ダクトの接続構造における連結体の、第２の連結部の両端部が開いた状態を示す斜視図である。It is a perspective view which shows the state in which both ends of the 2nd connecting part of the connecting body in the connecting structure of the square duct which concerns on embodiment of this invention are open. 図８の連結体の第２の連結部の両端部が閉じた状態を示す斜視図である。It is a perspective view which shows the state which both ends of the 2nd connecting part of the connecting body of FIG. 8 are closed. 図７の状態から図８の連結体を取り付けた状態を示す断面図（図１２のＤ２−Ｄ２断面図）である。It is sectional drawing (D2-D2 sectional view of FIG. 12) which shows the state which attached the connecting body of FIG. 8 from the state of FIG. 図３の状態から図８の連結体を取り付ける状態を示す斜視図である。It is a perspective view which shows the state which attaches the coupling body of FIG. 8 from the state of FIG. 図３の状態から図８の連結体を取り付けた状態を示す斜視図である。It is a perspective view which shows the state which attached the connecting body of FIG. 8 from the state of FIG.

以下、この発明を図示の実施の形態に基づいて説明する。 Hereinafter, the present invention will be described based on the illustrated embodiment.

図１〜図１２は、この発明の実施の形態を示し、図１は、この実施の形態に係る角ダクトＡを示す斜視図であり、図３は、この実施の形態に係る角ダクトＡの接続構造を示す正面図である。角ダクトＡは、耐食鋼板製の４つの壁板（側板部）１が略四角い筒状に配設されて両端部（両開口部）に継手部２を有するダクトであり、角ダクトＡの接続構造は、角ダクトＡと、角ダクトＡの継手部２と同構造・同形状の継手部２を有する被接続体と、を接続する接続構造である。ここで、この実施の形態では、被接続体が、角ダクトＡと同じ断面を有する（長さは異なってもよい）角ダクトＢの場合について、主として説明する。このため、角ダクトＡについて主として説明し、角ダクトＢについては、角ダクトＡの構成と同一の構成について同一符号を付することで、その説明を省略する。 1 to 12 show an embodiment of the present invention, FIG. 1 is a perspective view showing a square duct A according to this embodiment, and FIG. 3 is a perspective view of a square duct A according to this embodiment. It is a front view which shows the connection structure. The square duct A is a duct in which four wall plates (side plate portions) 1 made of corrosion-resistant steel plate are arranged in a substantially square tubular shape and have joint portions 2 at both ends (both openings), and is connected to the square duct A. The structure is a connection structure for connecting the square duct A and the connected body having the joint portion 2 having the same structure and shape as the joint portion 2 of the square duct A. Here, in this embodiment, the case where the connected body has the same cross section as the square duct A (the length may be different) will be mainly described. Therefore, the square duct A will be mainly described, and the square duct B will be omitted by giving the same reference numerals to the same configurations as those of the square duct A.

角ダクトＡは、この実施の形態では、折り畳みおよび展開が自在なダクトとなっている。すなわち、隣接する壁板１の側縁部において接合され、その接合部１０が回動自在で、接合部１０が回動することで、壁板１が重なるようにして全体が折り畳まれたり、筒状に展開したりできるようになっている。具体的には、図４に示すように、略長方形の壁板１の長手方向（角ダクトＡの軸線方向）に延びる一側縁部に、カール状のシングルハゼ１ａが形成されている。一方、この壁板１に隣接する壁板１の長手方向に延びる一側縁部に、シングルハゼ１ａと係合するカール状のダブルハゼ１ｂが形成され、シングルハゼ１ａとダブルハゼ１ｂとによって接合部（スピンハゼ）１０が構成されている。 In this embodiment, the square duct A is a duct that can be freely folded and unfolded. That is, they are joined at the side edge portions of the adjacent wall plates 1, the joint portions 10 are rotatable, and the joint portions 10 rotate so that the wall plates 1 are overlapped and the whole is folded or a cylinder. It can be expanded in a shape. Specifically, as shown in FIG. 4, a curled single goby 1a is formed on one side edge extending in the longitudinal direction (axial direction of the square duct A) of the substantially rectangular wall plate 1. On the other hand, a curled double goby 1b that engages with the single goby 1a is formed on one side edge portion extending in the longitudinal direction of the wall plate 1 adjacent to the wall plate 1, and the joint portion (joint portion) by the single goby 1a and the double goby 1b. Spin goby) 10 is configured.

そして、壁板１と壁板１とが直角に位置する状態（図４（ａ）、筒状に展開した状態）で、一方の壁板１を他方の壁板１側に押すと、ダブルハゼ１ｂを軸としてシングルハゼ１ａが回動し、図４（ｂ）に示すように、一方の壁板１が他方の壁板１側に移動する。つまり、図５に示すように、各壁板１が重なるようにして全体が折り畳まれた（扁平した）状態となる。さらに、この状態から、一方の壁板１を他方の壁板１側から離すと、ダブルハゼ１ｂを軸としてシングルハゼ１ａが回動し、４つの壁板１が筒状に展開された状態となるものである。なお、図４中符号１１は、チューブ状のガスケットである。 Then, when the wall plate 1 and the wall plate 1 are located at right angles (FIG. 4 (a), expanded in a tubular shape) and one wall plate 1 is pushed toward the other wall plate 1, the double goby 1b The single goby 1a rotates about the axis, and as shown in FIG. 4B, one wall plate 1 moves to the other wall plate 1 side. That is, as shown in FIG. 5, the entire wall plate 1 is folded (flattened) so as to overlap each other. Further, when one wall plate 1 is separated from the other wall plate 1 side from this state, the single goby 1a rotates around the double goby 1b, and the four wall plates 1 are deployed in a tubular shape. It is a thing. Reference numeral 11 in FIG. 4 is a tubular gasket.

継手部２は、各壁板１の端部（角ダクトＡの軸線方向に直交する辺部）に設けられた接続部３から構成されている。つまり、継手部２は、４つの接続部３から構成された四角い環状部で、角ダクトＡの両端部に継手部２が設けられている。 The joint portion 2 is composed of a connecting portion 3 provided at an end portion of each wall plate 1 (a side portion orthogonal to the axial direction of the square duct A). That is, the joint portion 2 is a square annular portion composed of four connecting portions 3, and the joint portions 2 are provided at both ends of the square duct A.

接続部３は、図６に示すように、壁板１の端部が壁板１の板面と略平行に３つ折りされて、壁板１側から順に下位接続部３１、中位接続部３２、上位接続部３３が設けられている。すなわち、壁板１の端部がそのまま真っ直ぐに延びた下位接続部３１と、下位接続部３１の上に重なるように折り曲げられた中位接続部３２と、さらに、中位接続部３２の上に重なるように折り曲げられた上位接続部３３と、を有する。 As shown in FIG. 6, the connection portion 3 has the end portion of the wall plate 1 folded in three substantially parallel to the plate surface of the wall plate 1, and the lower connection portion 31 and the middle connection portion 32 are sequentially folded from the wall plate 1 side. , The upper connection portion 33 is provided. That is, on the lower connection portion 31 in which the end portion of the wall plate 1 extends straight as it is, the middle connection portion 32 bent so as to overlap the lower connection portion 31, and further on the middle connection portion 32. It has an upper connecting portion 33 that is bent so as to overlap.

また、上位接続部３３の自由端が、下位接続部３１と中位接続部３２との折り曲げ部３１ａよりも突出して延びている。すなわち、角ダクトＢと接続された際に、上位接続部３３が角ダクトＢの下位接続部３１と中位接続部３２をほぼ覆うように、上位接続部３３の長さが設定されている。このような上位接続部３３が角ダクトＡの外側に位置するように、各壁板１が配置されている。 Further, the free end of the upper connecting portion 33 protrudes from the bent portion 31a of the lower connecting portion 31 and the intermediate connecting portion 32 and extends. That is, the length of the upper connecting portion 33 is set so that the upper connecting portion 33 substantially covers the lower connecting portion 31 and the intermediate connecting portion 32 of the square duct B when connected to the square duct B. Each wall plate 1 is arranged so that such an upper connection portion 33 is located outside the square duct A.

そして、角ダクトＡの接続部３の上位接続部３３を角ダクトＢの接続部３の上位接続部３３と中位接続部３２の間に嵌入、または、角ダクトＢの接続部３の上位接続部３３を角ダクトＡの接続部３の上位接続部３３と中位接続部３２の間に嵌入させられるように、上位接続部３３と中位接続部３２との隙間などが設定され、このような嵌入を行うことで、角ダクトＡと角ダクトＢとが接続・接合される。 Then, the upper connecting portion 33 of the connecting portion 3 of the square duct A is fitted between the upper connecting portion 33 of the connecting portion 3 of the square duct B and the intermediate connecting portion 32, or the upper connecting portion 3 of the connecting portion 3 of the square duct B is connected. A gap between the upper connecting portion 33 and the intermediate connecting portion 32 is set so that the portion 33 can be fitted between the upper connecting portion 33 and the intermediate connecting portion 32 of the connecting portion 3 of the square duct A. The square duct A and the square duct B are connected and joined by performing the fitting.

また、下位接続部３１と中位接続部３２との折り曲げ部３１ａには、折り曲げ部３１ａの長手方向（折り曲げ縁）に沿って、気密用のパッキン４が配設されている。ここで、折り曲げ部３１ａの断面は、所定幅のパッキン４を配設できるように、パッキン４を配設する面が広い台形状に形成されている。 Further, in the bent portion 31a of the lower connecting portion 31 and the middle connecting portion 32, a packing 4 for airtightness is arranged along the longitudinal direction (bending edge) of the bent portion 31a. Here, the cross section of the bent portion 31a is formed in a trapezoidal shape having a wide surface on which the packing 4 is arranged so that the packing 4 having a predetermined width can be arranged.

そして、図７に示すように、角ダクトＡの接続部３の上位接続部３３を角ダクトＢの接続部３の上位接続部３３と中位接続部３２の間に嵌入、または、角ダクトＢの接続部３の上位接続部３３を角ダクトＡの接続部３の上位接続部３３と中位接続部３２の間に嵌入させた際に、角ダクトＡのパッキン４と角ダクトＢのパッキン４が当接するように、パッキン４の厚みや折り曲げ部３１ａの位置などが設定されている。ここで、当接した際に、両パッキン４がやや圧縮されて、気密性が向上するように設定されている。 Then, as shown in FIG. 7, the upper connecting portion 33 of the connecting portion 3 of the square duct A is fitted between the upper connecting portion 33 of the connecting portion 3 of the square duct B and the intermediate connecting portion 32, or the square duct B is inserted. When the upper connection portion 33 of the connection portion 3 of the above is fitted between the upper connection portion 33 of the connection portion 3 of the square duct A and the middle connection portion 32, the packing 4 of the square duct A and the packing 4 of the square duct B The thickness of the packing 4 and the position of the bent portion 31a are set so that the packing 4 comes into contact with the packing 4. Here, both packings 4 are slightly compressed when they come into contact with each other, and the airtightness is improved.

接続部３の上位接続部３３には、係止部３３ａと上位被係止部３３ｂが設けられ、接続部３の中位接続部３２には、中位被係止部３２ａが設けられている。すなわち、図６に示すように、上位接続部３３の自由端部に、壁板１側に斜めに曲げられた係止部３３ａが、自由端縁に沿って形成され、上位接続部３３の中位接続部３２との折り曲げ部３２ｂ側に、壁板１側に窪んだ凹状の上位被係止部３３ｂが、長手方向（角ダクトＡの開口縁）に沿って形成されている。また、中位接続部３２の折り曲げ部３２ｂ側に、反壁板１側に突出した凸状の中位被係止部３２ａが、長手方向に沿って形成されている。ここで、中位被係止部３２ａは、係止部３３ａが侵入し易く、かつ、適正に係止するように、略三角形状（侵入側が斜めの略直角三角形）に形成されている。 The upper connection portion 33 of the connection portion 3 is provided with a locking portion 33a and an upper locked portion 33b, and the middle connecting portion 32 of the connecting portion 3 is provided with a middle locked portion 32a. .. That is, as shown in FIG. 6, at the free end portion of the upper connecting portion 33, a locking portion 33a bent obliquely toward the wall plate 1 side is formed along the free end edge, and is inside the upper connecting portion 33. On the bent portion 32b side with the position connecting portion 32, a concave upper locked portion 33b recessed on the wall plate 1 side is formed along the longitudinal direction (opening edge of the square duct A). Further, on the bent portion 32b side of the intermediate connecting portion 32, a convex intermediate locked portion 32a protruding toward the anti-wall plate 1 side is formed along the longitudinal direction. Here, the intermediate locked portion 32a is formed in a substantially triangular shape (a substantially right triangle with an oblique intrusion side) so that the locking portion 33a can easily enter and properly lock.

そして、角ダクトＡの接続部３の上位接続部３３が角ダクトＢの接続部３の上位接続部３３と中位接続部３２の間に嵌入されると、図７に示すように、角ダクトＡの係止部３３ａが角ダクトＢの中位被係止部３２ａに係止して、角ダクトＢの係止部３３ａが角ダクトＡの上位被係止部３３ｂに係止する。一方、角ダクトＢの接続部３の上位接続部３３が角ダクトＡの接続部３の上位接続部３３と中位接続部３２の間に嵌入されると、角ダクトＢの係止部３３ａが角ダクトＡの中位被係止部３２ａに係止して、角ダクトＡの係止部３３ａが角ダクトＢの上位被係止部３３ｂに係止する。換言すると、このように係止するように、係止部３３ａ、上位被係止部３３ｂおよび中位被係止部３２ａの位置、形状などが設定されている。 Then, when the upper connection portion 33 of the connection portion 3 of the square duct A is fitted between the upper connection portion 33 and the middle connection portion 32 of the connection portion 3 of the square duct B, as shown in FIG. 7, the square duct The locking portion 33a of A is locked to the intermediate locked portion 32a of the square duct B, and the locking portion 33a of the square duct B is locked to the upper locked portion 33b of the square duct A. On the other hand, when the upper connecting portion 33 of the connecting portion 3 of the square duct B is fitted between the upper connecting portion 33 of the connecting portion 3 of the square duct A and the intermediate connecting portion 32, the locking portion 33a of the square duct B is engaged. It is locked to the intermediate locked portion 32a of the square duct A, and the locking portion 33a of the square duct A is locked to the upper locked portion 33b of the square duct B. In other words, the positions, shapes, and the like of the locking portion 33a, the upper locked portion 33b, and the middle locked portion 32a are set so as to lock in this way.

また、接続部３の上位接続部３３には、強度および平坦度を高めるために、断面がＵ字状の補強リブ３３ｃが設けられている。すなわち、図６に示すように、上位接続部３３の係止部３３ａ側と上位被係止部３３ｂ側のそれぞれに、壁板１側に窪んだ断面がＵ字状の補強リブ３３ｃが、長手方向に沿って形成されている。 Further, the upper connecting portion 33 of the connecting portion 3 is provided with a reinforcing rib 33c having a U-shaped cross section in order to increase the strength and flatness. That is, as shown in FIG. 6, reinforcing ribs 33c having a U-shaped cross section recessed toward the wall plate 1 are longitudinally formed on each of the locking portion 33a side and the upper locked portion 33b side of the upper connecting portion 33. It is formed along the direction.

そして、図７に示すように、角ダクトＡの接続部３の上位接続部３３を角ダクトＢの接続部３の上位接続部３３と中位接続部３２の間に嵌入、または、角ダクトＢの接続部３の上位接続部３３を角ダクトＡの接続部３の上位接続部３３と中位接続部３２の間に嵌入させた際に、角ダクトＡの補強リブ３３ｃと角ダクトＢの補強リブ３３ｃとが重なるように、各補強リブ３３ｃの位置、形状などが設定されている。換言すると、所定の補強効果および平坦度維持効果が得られ、かつ、嵌入して角ダクトＡ、Ｂの補強リブ３３ｃが重なるように、補強リブ３３ｃの形状、大きさが設定されている。 Then, as shown in FIG. 7, the upper connection portion 33 of the connection portion 3 of the square duct A is fitted between the upper connection portion 33 and the middle connection portion 32 of the connection portion 3 of the square duct B, or the square duct B. When the upper connection portion 33 of the connection portion 3 of the above is fitted between the upper connection portion 33 and the middle connection portion 32 of the connection portion 3 of the square duct A, the reinforcing rib 33c of the square duct A and the reinforcement of the square duct B are reinforced. The position, shape, and the like of each reinforcing rib 33c are set so as to overlap with the rib 33c. In other words, the shape and size of the reinforcing ribs 33c are set so that a predetermined reinforcing effect and a flatness maintaining effect can be obtained and the reinforcing ribs 33c of the square ducts A and B are fitted and overlapped.

図８、図９に示す連結体５は、角ダクトＡと角ダクトＢが接続された状態で、角ダクトＡと角ダクトＢの継手部２の角部２１を連結する金物である。すなわち、角ダクトＡ、Ｂには、図１に示すように、ある接続部３の端部と隣接する接続部３の端部とによって、略直角な角部２１が形成され、接続部３の端部と隣接する接続部３の端部との間には、隙間が生じている。そして、角ダクトＡと角ダクトＢが接続されると、図１１に示すように、角ダクトＡ、Ｂの継手部２（各接続部３）が重なり、角部２１も重なる。連結体５は、このような角ダクトＡ、Ｂの角部２１同士を覆うようにして連結するものである。 The connecting body 5 shown in FIGS. 8 and 9 is a hardware that connects the square duct A and the corner portion 21 of the joint portion 2 of the square duct B in a state where the square duct A and the square duct B are connected. That is, as shown in FIG. 1, in the square ducts A and B, a substantially right-angled corner portion 21 is formed by the end portion of a certain connection portion 3 and the end portion of the adjacent connection portion 3, and the connection portion 3 is formed. There is a gap between the end portion and the end portion of the adjacent connecting portion 3. Then, when the square duct A and the square duct B are connected, as shown in FIG. 11, the joint portions 2 (each connecting portion 3) of the square ducts A and B overlap, and the corner portions 21 also overlap. The connecting body 5 is connected so as to cover the corner portions 21 of the square ducts A and B.

具体的には、図９に示すように、全体が略Ｌ字状体で、断面が略Ｃ字状で真っ直ぐ延びる第１の連結部５１と、断面が略Ｃ字状で第１の連結部５１の一端から略直角に延びる第２の連結部５２と、を有し、第１の連結部５１と第２の連結部５２のＣ字の開口がＬ字の内側を向いている。すなわち、長方形状の主面部５３と、この主面部５３の両側縁から垂直に突出する垂直部（端部）５４と、この両垂直部５４の端縁から主面部５３に平行に突出する水平部（端部）５５と、を有する断面がＣ字状の部材を、垂直部５４と水平部５５がＬ字の内側を向くように中央部で折り曲げたような形状で、折り曲げ部を境に第１の連結部５１と第２の連結部５２が形成されている。 Specifically, as shown in FIG. 9, a first connecting portion 51 having a substantially L-shaped cross section and a substantially C-shaped cross section extending straight, and a first connecting portion having a substantially C-shaped cross section and extending straight, as shown in FIG. It has a second connecting portion 52 extending substantially at a right angle from one end of the 51, and the C-shaped opening of the first connecting portion 51 and the second connecting portion 52 faces the inside of the L-shape. That is, a rectangular main surface portion 53, a vertical portion (end portion) 54 projecting vertically from both side edges of the main surface portion 53, and a horizontal portion projecting parallel to the main surface portion 53 from the end edges of both vertical portions 54. A member having a (end) 55 and a C-shaped cross section is bent at the center so that the vertical portion 54 and the horizontal portion 55 face the inside of the L-shape, and the first portion is bent at the bent portion. The connecting portion 51 of 1 and the second connecting portion 52 are formed.

また、第２の連結部５２のＣ字の両端部は開閉自在となっている。すなわち、図８に示すように、第２の連結部５２の主面部５３と垂直部５４の境には、ミシン目５６が形成され、使用前（製造時）には、両垂直部５４が開いて主面部５３と面一に配置されている。そして、ミシン目５６で両垂直部５４を折り曲げると、図９に示すように、両垂直部５４が閉じるようになっている。 Further, both ends of the C-shape of the second connecting portion 52 are openable and closable. That is, as shown in FIG. 8, a perforation 56 is formed at the boundary between the main surface portion 53 and the vertical portion 54 of the second connecting portion 52, and both vertical portions 54 are opened before use (during manufacturing). It is arranged flush with the main surface portion 53. Then, when both vertical portions 54 are bent at the perforations 56, both vertical portions 54 are closed as shown in FIG.

このような連結体５は、次のようにして取り付けられる。ここで、図１１に示すように、角ダクトＡの接続部３の１つである第１の接続部３１と、この第１の接続部３１と嵌入関係にある角ダクトＢの接続部３である第１の接続部３１とが重なったものを第１の重なり部３Ａとする。また、角ダクトＡの第１の接続部３１と隣接する接続部３である第２の接続部３２と、この第２の接続部３２と嵌入関係にある角ダクトＢの接続部３である第２の接続部３２とが重なったものを第２の重なり部３Ｂとする。そして、第１の重なり部３Ａと第２の重なり部３Ｂで構成される角部２１に、連結体５を取り付ける場合を例にして説明する。 Such a connecting body 5 is attached as follows. Here, as shown in FIG. 11, the first connecting portion 3 1 which is one of the connection part 3 of the corner duct A, the connection portion of the angular duct B in the first connecting portion 3 1 and the fitting relationship The overlap with the first connecting portion 3 1 which is 3, is referred to as the first overlapping portion 3A. Further, the second connecting portion 3 2 which is the connecting portion 3 adjacent to the first connecting portion 3 1 of the square duct A and the connecting portion 3 of the square duct B which has a fitting relationship with the second connecting portion 3 2 The overlap with the second connecting portion 3 2 is referred to as the second overlapping portion 3B. Then, a case where the connecting body 5 is attached to the corner portion 21 composed of the first overlapping portion 3A and the second overlapping portion 3B will be described as an example.

まず、図８に示す第２の連結部５２の両垂直部５４が開いた状態で、図１１に示すように、第１の重なり部３Ａの端縁から、第１の連結部５１のＣ字内に第１の重なり部３Ａの端部側を嵌入する。このとき、第１の重なり部３Ａの端縁を第１の連結部５１の両垂直部５４間に挿入して、第１の連結部５１を第１の重なり部３Ａに沿ってスライドさせることで、両垂直部５４と両水平部５５で構成される空間内（Ｃ字内）に第１の重なり部３Ａの端部側を収容する。 First, with both vertical portions 54 of the second connecting portion 52 shown in FIG. 8 open, as shown in FIG. 11, from the end edge of the first overlapping portion 3A, the C shape of the first connecting portion 51 is formed. The end side of the first overlapping portion 3A is fitted inside. At this time, the edge of the first overlapping portion 3A is inserted between the two vertical portions 54 of the first connecting portion 51, and the first connecting portion 51 is slid along the first overlapping portion 3A. The end side of the first overlapping portion 3A is accommodated in the space (inside the C shape) composed of both the vertical portions 54 and the horizontal portions 55.

そして、第２の連結部５２の主面部５３が第２の重なり部３Ｂに当接するまで、第１の連結部５１をスライドさせて、第２の重なり部３Ｂの端部側に第２の連結部５２を位置させる。続いて、第２の連結部５２のＣ字の両端部、つまり両垂直部５４を閉じて、図１２に示すように、第２の連結部５２のＣ字内に第２の重なり部３Ｂの端部側を嵌入、収容する。これにより、継手部２の角部２１が連結体５で連結される。 Then, the first connecting portion 51 is slid until the main surface portion 53 of the second connecting portion 52 abuts on the second overlapping portion 3B, and the second connecting portion 3B is connected to the end portion side of the second overlapping portion 3B. Position the portion 52. Subsequently, both ends of the C-shape of the second connecting portion 52, that is, both vertical portions 54 are closed, and as shown in FIG. 12, the second overlapping portion 3B is formed in the C-shape of the second connecting portion 52. Fit and accommodate the end side. As a result, the corner portions 21 of the joint portion 2 are connected by the connecting body 5.

このような取付状態では、第１の連結部５１と第２の連結部５２は、図１０に示すように、第１の重なり部３Ａと第２の重なり部３Ｂに嵌合する。ここで、第１の連結部５１について説明する。すなわち、第１の連結部５１の主面部５３が接続部３の上位接続部３３に対向し、両垂直部５４がそれぞれ接続部３の折り曲げ部３２ｂに対向して、両水平部５５がそれぞれ接続部３の下位接続部３１と中位接続部３２の間に位置する。 In such an attached state, the first connecting portion 51 and the second connecting portion 52 are fitted to the first overlapping portion 3A and the second overlapping portion 3B as shown in FIG. Here, the first connecting portion 51 will be described. That is, the main surface portion 53 of the first connecting portion 51 faces the upper connecting portion 33 of the connecting portion 3, both vertical portions 54 face each of the bent portions 32b of the connecting portion 3, and both horizontal portions 55 are connected to each other. It is located between the lower connection portion 31 and the middle connection portion 32 of the portion 3.

次に、このような構成の角ダクトＡおよび角ダクトＡの接続構造による、角ダクトＡの接続方法について説明する。 Next, a method of connecting the square duct A by the connection structure of the square duct A and the square duct A having such a configuration will be described.

まず、図２に示すように、角ダクトＡと角ダクトＢの継手部２同士を対向させ、角ダクトＡの接続部３の上位接続部３３を角ダクトＢの接続部３の上位接続部３３と中位接続部３２の間に嵌入、または、角ダクトＢの接続部３の上位接続部３３を角ダクトＡの接続部３の上位接続部３３と中位接続部３２の間に嵌入して、図３に示すように、角ダクトＡと角ダクトＢとを接続する。このとき、角ダクトＡのある接続部３では、角ダクトＡの上位接続部３３を角ダクトＢに嵌入し、角ダクトＡの他の接続部３では、角ダクトＢの上位接続部３３を角ダクトＡに嵌入してもよい。すなわち、角ダクトＡの４つの接続部３のうち、すべての接続部３を角ダクトＢに嵌入してもよいし、一部のどの接続部３を角ダクトＢに嵌入してもよいし、すべての接続部３に角ダクトＢを嵌入してもよい。 First, as shown in FIG. 2, the joint portions 2 of the square duct A and the square duct B face each other, and the upper connecting portion 33 of the connecting portion 3 of the square duct A is connected to the upper connecting portion 33 of the connecting portion 3 of the square duct B. And the upper connection part 33 of the connection part 3 of the square duct B is fitted between the upper connection part 33 and the middle connection part 32 of the connection part 3 of the square duct A. , As shown in FIG. 3, the square duct A and the square duct B are connected. At this time, in the connecting portion 3 having the square duct A, the upper connecting portion 33 of the square duct A is fitted into the square duct B, and in the other connecting portion 3 of the square duct A, the upper connecting portion 33 of the square duct B is cornered. It may be fitted in the duct A. That is, of the four connecting portions 3 of the square duct A, all the connecting portions 3 may be fitted into the square duct B, or any of the connecting portions 3 may be fitted into the square duct B. Square ducts B may be fitted into all the connecting portions 3.

このようにして角ダクトＡと角ダクトＢを接続すると、対向するすべての接続部３、３間において、角ダクトＡのパッキン４と角ダクトＢのパッキン４が当接して、接続部３、３間が気密される。また、角ダクトＡの係止部３３ａが角ダクトＢの中位被係止部３２ａに係止して、角ダクトＢの係止部３３ａが角ダクトＡの上位被係止部３３ｂに係止した状態、あるいは、角ダクトＢの係止部３３ａが角ダクトＡの中位被係止部３２ａに係止して、角ダクトＡの係止部３３ａが角ダクトＢの上位被係止部３３ｂに係止した状態となる。さらに、角ダクトＡの補強リブ３３ｃと角ダクトＢの補強リブ３３ｃが重なる。 When the square duct A and the square duct B are connected in this way, the packing 4 of the square duct A and the packing 4 of the square duct B come into contact with each other between all the connecting portions 3 and 3 facing each other, and the connecting portions 3 and 3 The space is airtight. Further, the locking portion 33a of the square duct A is locked to the intermediate locked portion 32a of the square duct B, and the locking portion 33a of the square duct B is locked to the upper locked portion 33b of the square duct A. In this state, or the locking portion 33a of the square duct B is locked to the intermediate locked portion 32a of the square duct A, and the locking portion 33a of the square duct A is locked to the upper locked portion 33b of the square duct B. It will be in a locked state. Further, the reinforcing rib 33c of the square duct A and the reinforcing rib 33c of the square duct B overlap.

次に、角ダクトＡと角ダクトＢの継手部２の全角部２１に、連結体５を上記のようにして取り付ける。このとき、角部２１を構成する２つの重なり部（例えば、上記の３Ａと３Ｂ）のうち、どちらの重なり部をどちらの連結部５１、５２に嵌入するかは、作業位置や作業姿勢、作業環境などに応じて、作業がし易い方にすればよい。 Next, the connecting body 5 is attached to the full-width portion 21 of the joint portion 2 of the square duct A and the square duct B as described above. At this time, which of the two overlapping portions (for example, 3A and 3B described above) constituting the corner portion 21 is fitted into which connecting portion 51 or 52 depends on the working position, working posture, and work. Depending on the environment etc., it may be easier to work.

以上のように、この角ダクトＡの接続構造、接続方法および角ダクトＡによれば、角ダクトＡの接続部３の上位接続部３３を角ダクトＢの接続部３の上位接続部３３と中位接続部３２の間に嵌入させ、あるいは、角ダクトＢの接続部３の上位接続部３３を角ダクトＡの接続部３の上位接続部３３と中位接続部３２の間に嵌入させるだけで、角ダクトＡと角ダクトＢとが接続される。このため、角ダクトＡと角ダクトＢを容易かつ短時間で接続することが可能となり、また、狭い場所や高い場所などでも、作業者に大きな負担を与えることなく適正に（接続箇所の漏れが接続不良などなく）接続することが可能となる。しかも、工具を要しないため、安全かつ容易な作業が可能となる。さらに、多くのフランジ押え金物やボルトなどを要しないため、コストを低減することが可能となる。しかも、従来のフランジが壁板に対して垂直に突出しているのに対して、接続部３が壁板１の板面と略平行なため、スリムで良好な外観が得られるとともに、設置スペースや搬送スペースを軽減することが可能となり、さらには、搬送時などに接続部３が変形したりするのが抑制される。 As described above, according to the connection structure and connection method of the square duct A and the square duct A, the upper connection portion 33 of the connection portion 3 of the square duct A is centered with the upper connection portion 33 of the connection portion 3 of the square duct B. It is simply fitted between the upper connecting portions 32, or the upper connecting portion 33 of the connecting portion 3 of the square duct B is fitted between the upper connecting portion 33 of the connecting portion 3 of the square duct A and the intermediate connecting portion 32. , The square duct A and the square duct B are connected. Therefore, the square duct A and the square duct B can be easily and quickly connected, and even in a narrow place or a high place, the operator can be properly connected without imposing a heavy burden (leakage at the connection point). It is possible to connect (without poor connection). Moreover, since no tools are required, safe and easy work is possible. Further, since many flange holding hardware and bolts are not required, the cost can be reduced. Moreover, while the conventional flange projects perpendicularly to the wall plate, the connecting portion 3 is substantially parallel to the plate surface of the wall plate 1, so that a slim and good appearance can be obtained, and the installation space and installation space are increased. It is possible to reduce the transport space, and further, it is possible to prevent the connection portion 3 from being deformed during transport.

また、角ダクトＡの４つの接続部３のうち、ある接続部３においては、その上位接続部３３を角ダクトＢの接続部３の上位接続部３３と中位接続部３２の間に嵌入させ、別の接続部３においては、その上位接続部３３と中位接続部３２の間に角ダクトＢの接続部３の上位接続部３３を嵌入させてもよい。つまり、角ダクトＡと角ダクトＢのどちらの上位接続部３３を嵌入させるかは問わず、嵌入させればよいため、作業者はどちらを嵌入させるかを気にする必要がなく、より容易かつ短時間で接続することが可能となる。 Further, among the four connection portions 3 of the square duct A, in a certain connection portion 3, the upper connection portion 33 is fitted between the upper connection portion 33 and the middle connection portion 32 of the connection portion 3 of the square duct B. In another connection portion 3, the upper connection portion 33 of the connection portion 3 of the square duct B may be fitted between the upper connection portion 33 and the middle connection portion 32. That is, it does not matter whether the upper connection portion 33 of the square duct A or the square duct B is fitted, so that the operator does not have to worry about which one to fit, which is easier and easier. It becomes possible to connect in a short time.

また、例えば、角ダクトＡの接続部３の上位接続部３３を角ダクトＢの接続部３の上位接続部３３と中位接続部３２の間に嵌入させて、角ダクトＡと角ダクトＢとが接続されると、角ダクトＡのパッキン４と角ダクトＢのパッキン４が当接するため、角ダクトＡの接続部３と角ダクトＢの接続部３とがパッキン４で気密される。このため、角ダクトＡと角ダクトＢを接続した後に気密処理・シーリングを施す必要がなく、作業の迅速化、適正化（作業漏れや作業不良などの削減）を図ることが可能となる。 Further, for example, the upper connecting portion 33 of the connecting portion 3 of the square duct A is fitted between the upper connecting portion 33 of the connecting portion 3 of the square duct B and the intermediate connecting portion 32, and the square duct A and the square duct B are formed. Is connected, the packing 4 of the square duct A and the packing 4 of the square duct B come into contact with each other, so that the connecting portion 3 of the square duct A and the connecting portion 3 of the square duct B are airtightly sealed by the packing 4. Therefore, it is not necessary to perform airtight treatment / sealing after connecting the square duct A and the square duct B, and it is possible to speed up and optimize the work (reduce work omissions and work defects).

さらに、角ダクトＡと角ダクトＢが接続されると、角ダクトＡの係止部３３ａが角ダクトＢの中位被係止部３２ａに係止して、角ダクトＢの係止部３３ａが角ダクトＡの上位被係止部３３ｂに係止した状態、あるいは、角ダクトＢの係止部３３ａが角ダクトＡの中位被係止部３２ａに係止して、角ダクトＡの係止部３３ａが角ダクトＢの上位被係止部３３ｂに係止した状態となる。このため、角ダクトＡと角ダクトＢが離れることが防止、抑制され、適正かつ強固に接続することが可能になるとともに、連結体５の取り付けなどを容易に行うことが可能となる。 Further, when the square duct A and the square duct B are connected, the locking portion 33a of the square duct A is locked to the intermediate locked portion 32a of the square duct B, and the locking portion 33a of the square duct B is engaged. The state of being locked to the upper locked portion 33b of the square duct A, or the locking portion 33a of the square duct B is locked to the middle locked portion 32a of the square duct A to lock the square duct A. The portion 33a is in a state of being locked to the upper locked portion 33b of the square duct B. Therefore, it is possible to prevent and suppress the separation of the square duct A and the square duct B, enable proper and firm connection, and facilitate attachment of the connecting body 5.

また、角ダクトＡと角ダクトＢの接続部３に補強リブ３３ｃが設けられているため、接続部３が強固となり、角ダクトＡと角ダクトＢを適正かつ強固に接続することが可能となる。しかも、角ダクトＡと角ダクトＢが接続されると、角ダクトＡの補強リブ３３ｃと角ダクトＢの補強リブ３３ｃとが重なるため、より適正かつ強固に接続することが可能となる。 Further, since the reinforcing rib 33c is provided at the connecting portion 3 between the square duct A and the square duct B, the connecting portion 3 becomes strong, and the square duct A and the square duct B can be properly and firmly connected. .. Moreover, when the square duct A and the square duct B are connected, the reinforcing rib 33c of the square duct A and the reinforcing rib 33c of the square duct B overlap each other, so that the square duct A and the square duct B can be connected more appropriately and firmly.

一方、角ダクトＡと角ダクトＢが接続された状態で、角ダクトＡと角ダクトＢの継手部２の角部２１同士が連結体５で連結されるため、角ダクトＡと角ダクトＢとの接続を強固に維持することが可能となる。 On the other hand, in a state where the square duct A and the square duct B are connected, the corner portions 21 of the joint portion 2 of the square duct A and the square duct B are connected by the connecting body 5, so that the square duct A and the square duct B are connected. It is possible to maintain a strong connection.

この際、連結体５の第１の連結部５１のＣ字内に、例えば、角ダクトＡと角ダクトＢの第１の重なり部３Ａの端部側を嵌入して連結体５をスライドさせ、第２の連結部５２の両垂直部５４を閉じて第２の重なり部３Ｂの端部側を嵌入するだけで、容易かつ適正に継手部２の角部２１同士を連結することができる。しかも、工具を要しないため、安全かつ容易な作業が可能となる。 At this time, for example, the end side of the first overlapping portion 3A of the square duct A and the square duct B is fitted into the C-shape of the first connecting portion 51 of the connecting body 5, and the connecting body 5 is slid. By simply closing both vertical portions 54 of the second connecting portion 52 and fitting the end portion side of the second overlapping portion 3B, the corner portions 21 of the joint portion 2 can be easily and appropriately connected to each other. Moreover, since no tools are required, safe and easy work is possible.

以上、この発明の実施の形態について説明したが、具体的な構成は、上記の実施の形態に限られるものではなく、この発明の要旨を逸脱しない範囲の設計の変更等があっても、この発明に含まれる。例えば、上記の実施の形態では、被接続体が角ダクトＢの場合について説明したが、被接続体がチャンバーや管継手など、他の空調機器であってもよい。 Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above-described embodiment, and even if there is a design change or the like within a range that does not deviate from the gist of the present invention. Included in the invention. For example, in the above embodiment, the case where the connected body is the square duct B has been described, but the connected body may be another air-conditioning device such as a chamber or a pipe joint.

Ａ 角ダクト
Ｂ 角ダクト（被接続体）
１ 壁板（側板部）
２ 継手部
２１ 角部
３ 接続部
３１ 第１の接続部
３２ 第２の接続部
３Ａ 第１の重なり部
３Ｂ 第２の重なり部
３１ 下位接続部
３１ａ 折り曲げ部
３２ 中位接続部
３２ａ 中位被係止部
３３ 上位接続部
３３ａ 係止部
３３ｂ 上位被係止部
３３ｃ 補強リブ
４ パッキン
５ 連結体
５１ 第１の連結部
５２ 第２の連結部
５３ 主面部
５４ 垂直部（端部）
５５ 水平部（端部）
A square duct B square duct (connected body)
1 Wall plate (side plate)
2 Joint part 21 Square part 3 Connection part 3 1 First connection part 3 2 Second connection part 3A First overlapping part 3B Second overlapping part 31 Lower connection part 31a Bending part 32 Intermediate connection part 32a Medium Locked part 33 Upper connecting part 33a Locking part 33b Upper locked part 33c Reinforcing rib 4 Packing 5 Connecting body 51 First connecting part 52 Second connecting part 53 Main surface part 54 Vertical part (end)
55 Horizontal part (end)

Claims (7)

４つの側板部が略四角い筒状に配設されて端部に継手部を有する角ダクトと、前記継手部と同構造の継手部を有する被接続体と、を接続する角ダクトの接続構造であり、
前記継手部は、前記各側板部の端部に設けられた接続部から構成され、
前記接続部は、前記側板部の端部が前記側板部の板面と略平行に３つ折りされて、前記側板部側から順に下位接続部、中位接続部、上位接続部が設けられ、前記上位接続部の自由端が前記下位接続部と前記中位接続部との折り曲げ部よりも突出し、前記上位接続部に係止部と上位被係止部が設けられ、前記中位接続部に中位被係止部が設けられ、
前記角ダクトの接続部の上位接続部を前記被接続体の接続部の上位接続部と中位接続部の間に嵌入させると、前記角ダクトの係止部が前記被接続体の中位被係止部に係止して、前記被接続体の係止部が前記角ダクトの上位被係止部に係止し、または、前記被接続体の接続部の上位接続部を前記角ダクトの接続部の上位接続部と中位接続部の間に嵌入させると、前記被接続体の係止部が前記角ダクトの中位被係止部に係止して、前記角ダクトの係止部が前記被接続体の上位被係止部に係止して、前記角ダクトと前記被接続体とが接続される、
ことを特徴とする角ダクトの接続構造。 With a connection structure of a square duct that connects a square duct having four side plate portions arranged in a substantially square tubular shape and having a joint portion at an end, and a connected body having a joint portion having the same structure as the joint portion. Yes,
The joint portion is composed of a connection portion provided at an end portion of each side plate portion.
In the connection portion, the end portion of the side plate portion is folded in three substantially parallel to the plate surface of the side plate portion, and a lower connection portion, a middle connection portion, and an upper connection portion are provided in order from the side plate portion side. The free end of the upper connection portion protrudes from the bent portion of the lower connection portion and the middle connection portion, the upper connection portion is provided with the locking portion and the upper locked portion, and the middle connection portion is provided with the middle. A locked part is provided,
When the upper connection portion of the connection portion of the square duct is fitted between the upper connection portion and the middle connection portion of the connection portion of the connected body, the locking portion of the square duct becomes the middle cover of the connected body. Locked to the locking portion, the locking portion of the connected body is locked to the upper locked portion of the square duct, or the upper connecting portion of the connecting portion of the connected body is locked to the square duct. When fitted between the upper connection portion and the middle connection portion of the connection portion, the locking portion of the connected body is locked to the middle locked portion of the square duct, and the locking portion of the square duct is engaged. Locks to the upper locked portion of the connected body, and the square duct and the connected body are connected.
The connection structure of the square duct is characterized by that. 前記折り曲げ部にパッキンが設けられ、前記角ダクトの接続部の上位接続部を前記被接続体の接続部の上位接続部と中位接続部の間に嵌入、または、前記被接続体の接続部の上位接続部を前記角ダクトの接続部の上位接続部と中位接続部の間に嵌入させた際に、前記角ダクトのパッキンと前記被接続体のパッキンが当接する、
ことを特徴とする請求項１に記載の角ダクトの接続構造。 A packing is provided on the bent portion, and the upper connecting portion of the connecting portion of the square duct is fitted between the upper connecting portion and the intermediate connecting portion of the connecting portion of the connected body, or the connecting portion of the connected body is fitted. When the upper connection portion of the square duct is fitted between the upper connection portion and the middle connection portion of the connection portion of the square duct, the packing of the square duct and the packing of the connected body come into contact with each other.
The connection structure for a square duct according to claim 1. 前記角ダクトと前記被接続体とが接続された状態で、前記角ダクトと前記被接続体の継手部の角部を連結する連結体を備える、
ことを特徴とする請求項１または２のいずれか１項に記載の角ダクトの接続構造。 A connecting body for connecting the square duct and the corner portion of the joint portion of the connected body is provided in a state where the square duct and the connected body are connected.
The connection structure of a square duct according to any one of claims 1 or 2, characterized in that. 前記連結体は、略Ｌ字状体で、断面が略Ｃ字状で真っ直ぐ延びる第１の連結部と、断面が略Ｃ字状で前記第１の連結部の一端から略直角に延びてＣ字の両端部が開閉自在な第２の連結部と、を有し、前記第１の連結部と前記第２の連結部のＣ字の開口がＬ字の内側を向き、
前記角ダクトの接続部の１つである第１の接続部と、該第１の接続部と嵌入関係にある前記被接続体の接続部である第１の接続部とが重なった第１の重なり部の端縁から、前記第１の連結部のＣ字内に前記第１の重なり部の端部側を嵌入し、前記角ダクトの第１の接続部と隣接する接続部である第２の接続部と、該第２の接続部と嵌入関係にある前記被接続体の接続部である第２の接続部とが重なった第２の重なり部の端部側に、前記第２の連結部を位置させてＣ字の両端部を閉じ、前記第２の連結部のＣ字内に前記第２の重なり部の端部側を嵌入することで、前記継手部の角部を連結する、
ことを特徴とする請求項３に記載の角ダクトの接続構造。 The connecting body is a substantially L-shaped body, and has a first connecting portion having a substantially C-shaped cross section and extending straight, and a C having a substantially C-shaped cross section extending substantially at a right angle from one end of the first connecting portion. Both ends of the character have a second connecting portion that can be opened and closed, and the C-shaped opening of the first connecting portion and the second connecting portion faces the inside of the L-shape.
A first connection portion in which a first connection portion, which is one of the connection portions of the square duct, and a first connection portion, which is a connection portion of the connected body having a fitting relationship with the first connection portion, overlap. A second connecting portion that is adjacent to the first connecting portion of the square duct by fitting the end side of the first overlapping portion into the C-shape of the first connecting portion from the end edge of the overlapping portion. On the end side of the second overlapping portion where the connecting portion of the above and the second connecting portion which is the connecting portion of the connected body which is fitted to the second connecting portion overlap, the second connection The corners of the joint are connected by positioning the portions, closing both ends of the C-shape, and fitting the end side of the second overlapping portion into the C-shape of the second connecting portion.
The connection structure for a square duct according to claim 3. 断面がＵ字状または逆Ｕ凹状の補強リブが、前記接続部の上位接続部に設けられ、
前記角ダクトの接続部の上位接続部を前記被接続体の接続部の上位接続部と中位接続部の間に嵌入、または、前記被接続体の接続部の上位接続部を前記角ダクトの接続部の上位接続部と中位接続部の間に嵌入させた際に、前記角ダクトの補強リブと前記被接続体の補強リブとが重なる、
ことを特徴とする請求項１から４のいずれか１項に記載の角ダクトの接続構造。 Reinforcing ribs with a U-shaped or inverted U-shaped cross section are provided at the upper connecting portion of the connecting portion.
The upper connection portion of the connection portion of the square duct is fitted between the upper connection portion and the middle connection portion of the connection portion of the connected body, or the upper connection portion of the connection portion of the connected body is of the square duct. When fitted between the upper connection portion and the middle connection portion of the connection portion, the reinforcing ribs of the square duct and the reinforcing ribs of the connected body overlap.
The connection structure for a square duct according to any one of claims 1 to 4 , characterized in that. ４つの側板部が略四角い筒状に配設されて端部に継手部を有する角ダクトと、前記継手部と同構造の継手部を有する被接続体と、を接続する角ダクトの接続方法であり、
前記継手部は、前記各側板部の端部に設けられた接続部から構成され、
前記接続部は、前記側板部の端部が前記側板部の板面と略平行に３つ折りされて、前記側板部側から順に下位接続部、中位接続部、上位接続部が設けられ、前記上位接続部の自由端が前記下位接続部と前記中位接続部との折り曲げ部よりも突出し、前記上位接続部に係止部と上位被係止部が設けられ、前記中位接続部に中位被係止部が設けられ、
前記角ダクトの接続部の上位接続部を前記被接続体の接続部の上位接続部と中位接続部の間に嵌入して、前記角ダクトの係止部を前記被接続体の中位被係止部に係止させ、前記被接続体の係止部を前記角ダクトの上位被係止部に係止させ、または、前記被接続体の接続部の上位接続部を前記角ダクトの接続部の上位接続部と中位接続部の間に嵌入して、前記被接続体の係止部を前記角ダクトの中位被係止部に係止させ、前記角ダクトの係止部を前記被接続体の上位被係止部に係止させて、前記角ダクトと前記被接続体とを接続する、
ことを特徴とする角ダクトの接続方法。 A method of connecting a square duct that connects a square duct having four side plate portions arranged in a substantially square tubular shape and having a joint portion at an end and a connected body having a joint portion having the same structure as the joint portion. Yes,
The joint portion is composed of a connection portion provided at an end portion of each side plate portion.
In the connection portion, the end portion of the side plate portion is folded in three substantially parallel to the plate surface of the side plate portion, and a lower connection portion, a middle connection portion, and an upper connection portion are provided in order from the side plate portion side. The free end of the upper connection portion protrudes from the bent portion of the lower connection portion and the middle connection portion, the upper connection portion is provided with the locking portion and the upper locked portion, and the middle connection portion is provided with the middle. A locked part is provided,
The upper connection portion of the connection portion of the square duct is fitted between the upper connection portion and the middle connection portion of the connection portion of the connected body, and the locking portion of the square duct is inserted into the middle cover portion of the connected body. It is locked to the locking portion, the locking portion of the connected body is locked to the upper locked portion of the square duct, or the upper connecting portion of the connecting portion of the connected body is connected to the square duct. It is fitted between the upper connection portion and the middle connection portion of the portion, the locking portion of the connected body is locked to the middle locked portion of the square duct, and the locking portion of the square duct is described. The square duct and the connected body are connected by locking the upper locked portion of the connected body.
A method of connecting square ducts, which is characterized by this. ４つの側板部が略四角い筒状に配設されて端部に継手部を有する角ダクトであって、
前記継手部は、前記各側板部の端部に設けられた接続部から構成され、
前記接続部は、前記側板部の端部が前記側板部の板面と略平行に３つ折りされて、前記側板部側から順に下位接続部、中位接続部、上位接続部が設けられ、前記上位接続部の自由端が前記下位接続部と前記中位接続部との折り曲げ部よりも突出し、前記上位接続部に係止部と上位被係止部が設けられ、前記中位接続部に中位被係止部が設けられ、
前記継手部と同構造の継手部を有する被接続体に対して、前記角ダクトの接続部の上位接続部を前記被接続体の接続部の上位接続部と中位接続部の間に嵌入して、前記角ダクトの係止部を前記被接続体の中位被係止部に係止させ、前記被接続体の係止部を前記角ダクトの上位被係止部に係止させ、または、前記被接続体の接続部の上位接続部を前記角ダクトの接続部の上位接続部と中位接続部の間に嵌入して、前記被接続体の係止部を前記角ダクトの中位被係止部に係止させ、前記角ダクトの係止部を前記被接続体の上位被係止部に係止させることで、前記角ダクトと前記被接続体とが接続される、
ことを特徴とする角ダクト。 A square duct in which four side plates are arranged in a substantially square tubular shape and have joints at the ends.
The joint portion is composed of a connection portion provided at an end portion of each side plate portion.
In the connection portion, the end portion of the side plate portion is folded in three substantially parallel to the plate surface of the side plate portion, and a lower connection portion, a middle connection portion, and an upper connection portion are provided in order from the side plate portion side. The free end of the upper connection portion protrudes from the bent portion of the lower connection portion and the middle connection portion, the upper connection portion is provided with the locking portion and the upper locked portion, and the middle connection portion is provided with the middle. A locked part is provided,
Relative object to be connected with a joint portion of the joint portion of the same structure, and fitting the upper connecting portion of the connecting portion of the angle duct between the upper connecting portion and the middle connecting portion of the connecting portion of the object to be connected Then, the locking portion of the square duct is locked to the intermediate locked portion of the connected body, and the locking portion of the connected body is locked to the upper locked portion of the square duct , or , The upper connection portion of the connection portion of the connected body is fitted between the upper connection portion and the middle connection portion of the connection portion of the square duct, and the locking portion of the connected body is placed in the middle of the square duct. locked portion engaged thereby locked to the locking portion of the angle duct that is locked to the upper engaged portion of the object to be connected, the said angle duct and the connection body are connected,
A square duct characterized by that.
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JP6128858B2 (en) * 2012-01-26 2017-05-17 株式会社新富士空調 Duct and duct connection structure

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