JP6128858B2 - Duct and duct connection structure - Google Patents

Duct and duct connection structure Download PDF

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JP6128858B2
JP6128858B2 JP2013008936A JP2013008936A JP6128858B2 JP 6128858 B2 JP6128858 B2 JP 6128858B2 JP 2013008936 A JP2013008936 A JP 2013008936A JP 2013008936 A JP2013008936 A JP 2013008936A JP 6128858 B2 JP6128858 B2 JP 6128858B2
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fitting
fitted
component
duct
bent
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JP2013174427A (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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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02Ducting arrangements
    • F24F13/0245Manufacturing or assembly of air ducts; Methods therefor

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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)

Description

この発明は、空調用あるいは吸排気用などの壁板を接合して筒状に形成された長方形断面を有するダクトを、二つ突合せて接続するダクトおよびダクト接続構造に関する。   The present invention relates to a duct and a duct connection structure in which two ducts having a rectangular cross section formed into a cylindrical shape by joining wall plates for air conditioning or intake / exhaust are connected together.

従来、ダクトの接続構造は、TDCやTFDと称される共板フランジ接続工法がよく知られている。この共板フランジ接続工法では、筒状ダクト両端の開口端部の四辺を各々外方へ直角に折曲することで、このダクトの筒状開口端部の四辺に接続用のフランジ部を形成する。そして、このフランジ部同士をガスケットを介して突き合わせた上、各フランジ部の四隅に装着したL形のコーナーピースをボルト・ナット止めすると共に、突き合わせたフランジ部をクリップで弾性的に挟み込むことで、フランジ部同士(筒状ダクト同士)を接続する構成の工法が用いられている。(例えば、特許文献1または2参照。)。   Conventionally, a common plate flange connection method called TDC or TFD is well known as a duct connection structure. In this co-plate flange connection method, the flanges for connection are formed on the four sides of the cylindrical opening end portion of the duct by bending the four sides of the opening end portions of the cylindrical duct at right angles outward. . Then, after abutting the flange parts through gaskets, the L-shaped corner pieces attached to the four corners of each flange part are bolted and nut-fastened, and the abutted flange parts are elastically sandwiched with clips, A construction method of connecting flange portions (cylindrical ducts) to each other is used. (For example, refer to Patent Document 1 or 2.)

このような従来のダクトの接続構造(共板フランジ接続工法)は、ボルト固定が四隅(コーナーピース)のみで少ない分、突き合わせた接続部の各辺毎に前述したクリップ(板厚は1.0mm程度)という金具をかみ合わせて強度を出すように構成されている。   In such a conventional duct connection structure (co-plate flange connection method), the clip (plate thickness is 1.0 mm) described above for each side of the contacted portion where the bolt is fixed only at the four corners (corner pieces). It is configured to increase the strength by engaging the metal fittings.

特開平7−91723号公報JP 7-91723 A 特開2011−122810号公報JP 2011-122810 A

しかしながら、従来のダクトの接続構造では、ダクトのフランジ部同士のボルト固定が四隅のコーナーピースのみでここに負荷が集中するため、地震などの衝撃によりコーナーピース単体がフランジ部から外れる可能性があり、これによりダクト同士の接続部(フランジ部間)もズレてしまうという不具合があった。   However, in the conventional duct connection structure, the bolts between the flange portions of the duct are fixed only at the corner pieces at the four corners, and the load concentrates here, so there is a possibility that the corner piece alone will come off the flange portion due to an impact such as an earthquake. As a result, there is a problem that the connecting portion (between the flange portions) between the ducts is also displaced.

また、従来のダクトの接続構造では、フランジ部同士をクリップで弾性的に挟み込んで接続しているが、このクリップも地震などの負荷により外れる場合があり、ダクト同士の接続部(フランジ部間)がズレてしまうという不具合があった。   Also, in the conventional duct connection structure, the flange portions are elastically sandwiched and connected by clips, but this clip may also be disconnected by a load such as an earthquake, and the connection portions between the ducts (between the flange portions) There was a problem that would shift.

そこで、この発明は、ダクト同士を突き合わせたフランジ部間が地震などの負荷でも外れることなく、かつフランジ部間の接続部でのズレを防止できるダクトおよびダクト接続構造を提供することを目的としている。   Then, this invention aims at providing the duct and duct connection structure which can prevent the shift | offset | difference in the connection part between flange parts, without the space | interval between the flange parts which faced ducts also coming off by load, such as an earthquake. .

前記の課題を解決するために、請求項1の発明は、壁板が四方に配設された筒状のダクト同士を、開口端部が互いに接するように接続するダクト接続構造であって、一方のダクトの開口端部に、前記壁板が折り曲げられて開口端縁に沿って延びる凸状の嵌合部が形成され、他方のダクトの開口端部に、前記壁板が折り曲げられて開口端縁に沿って延びる凹状の被嵌合部が形成され、前記嵌合部が前記被嵌合部内に嵌合することで、前記一方のダクトと前記他方のダクトとが接続される、ことを特徴とするダクト接続構造である。   In order to solve the above-mentioned problem, the invention of claim 1 is a duct connection structure for connecting cylindrical ducts having wall plates arranged in four directions so that the open end portions thereof are in contact with each other. At the opening end of the duct, the wall plate is bent to form a convex fitting portion extending along the opening edge, and at the opening end of the other duct, the wall plate is bent to the opening end. A concave mating portion extending along an edge is formed, and the one duct and the other duct are connected by fitting the mating portion into the mating portion. This is a duct connection structure.

この発明によれば、壁板が四方に配設された筒状のダクト同士を、突き合わせて互いに接するように配置させ、この突き合わせた一方のダクトの開口端部に凸状の嵌合部と、他方のダクトの開口端部に凹状の被嵌合部と、が各々配置されて、この嵌合部が被嵌合部に嵌合することで、一方のダクトと他方のダクトとがズレなく接続される。   According to this invention, the cylindrical ducts in which the wall plates are arranged in four directions are arranged so as to abut each other and come into contact with each other, and a convex fitting portion at the opening end portion of the one of the abutted, A concave mating part is arranged at the opening end of the other duct, and the one duct and the other duct are connected without misalignment by fitting the mating part to the mating part. Is done.

さらに、請求項1の発明は、前記嵌合部は、開口側に延びる第1の嵌合構成部と、この第1の嵌合構成部から反開口側に折り曲げられた第2の嵌合構成部と、この第2の嵌合構成部から開口側に折り曲げられた第3の嵌合構成部と、この第3の嵌合構成部から前記壁板と並行に外側に突出して折り曲げられた突出部と、を備え、前記被嵌合部は、開口側に延びる第1の被嵌合構成部と、この第1の被嵌合構成部から反開口側に折り曲げられた第2の被嵌合構成部と、この第2の被嵌合構成部から開口側に折り曲げられた第3の被嵌合構成部と、前記第2の被嵌合構成部と第3の嵌合構成部との間に前記壁板と並行に溝状に折り曲げられた溝部と、を備える、ことを特徴とする。 Further, according to the invention of claim 1 , the fitting portion includes a first fitting configuration portion extending toward the opening side, and a second fitting configuration bent from the first fitting configuration portion toward the non-opening side. , A third fitting component bent to the opening side from the second fitting component, and a protrusion protruding outward from the third fitting component in parallel with the wall plate A first fitted component that extends to the opening side, and a second fitted member that is bent from the first fitted component to the side opposite to the opening. Between the component, the third fitted component bent from the second fitted component to the opening side, and the second fitted component and the third fitted component And a groove portion bent in a groove shape in parallel with the wall plate.

この発明によれば、嵌合部に、第1の嵌合構成部、第2の嵌合構成部、第3の嵌合構成部のように複数折り曲げられた嵌合構成部を介して形成される突出部と、被嵌合部に、第1の被嵌合構成部、第2の被嵌合構成部、第3の被嵌合構成部のような複数折り曲げられた被嵌合構成部を介して形成される溝部と、を備えることで、この突出部と溝部との開口端部が複数折り曲げた折り曲げ部により補強される。   According to the present invention, the fitting portion is formed via a plurality of folded fitting components such as the first fitting component, the second fitting component, and the third fitting component. A plurality of bent components such as a first fitted component, a second fitted component, and a third fitted component on the protruding portion and the fitted portion. And the groove end portion formed between the projecting portion and the groove portion is reinforced by a plurality of bent end portions.

請求項の発明は、請求項1に記載のダクト接続構造において、前記突出部から、前記壁板に対して垂直に延びる嵌合側フランジ部が形成され、前記溝部から、前記壁板に対して垂直に延びる被嵌合側フランジ部が形成され、前記嵌合側フランジ部と被嵌合側フランジ部とがボルトを介して接続される、ことを特徴とする。 The invention of claim 2 is the duct connection structure according to claim 1, from said protrusion fitting-side flange portion extending perpendicular to said wall plate is formed from the groove, with respect to the wallboard The fitting side flange portion extending vertically is formed, and the fitting side flange portion and the fitting side flange portion are connected via a bolt.

この発明によれば、突出部から垂直に延びる嵌合側フランジ部と、溝部から垂直に延びる被嵌合側フランジ部とを備え、当該突出部と溝部とを篏合させることで、この垂直方向の嵌合側フランジ部と被嵌合側フランジ部とがお互い当接して容易に外れないようにボルトを介して固定される。   According to the present invention, the fitting side flange portion extending vertically from the protruding portion and the fitted side flange portion extending vertically from the groove portion are provided, and the protruding portion and the groove portion are engaged with each other in the vertical direction. The fitting-side flange portion and the fitted-side flange portion are fixed via bolts so as not to come into contact with each other and easily come off.

請求項の発明は、壁板が四方に配設された筒状のダクトであって、一方の開口端部に、前記壁板が折り曲げられて開口端縁に沿って延びる凸状の嵌合部が形成され、他方の開口端部に、前記壁板が折り曲げられて開口端縁に沿って延びる凹状の被嵌合部が形成され、前記嵌合部が前記被嵌合部内に嵌合可能となっている、ことを特徴とするダクトである。 The invention of claim 3 is a cylindrical duct in which wall plates are arranged in four directions, and a convex fitting that extends along the opening edge by bending the wall plate at one opening end. The wall plate is bent at the other opening end to form a recessed fitting portion that extends along the opening edge, and the fitting portion can be fitted into the fitting portion. This is a duct characterized by that.

さらに、請求項3の発明は、前記嵌合部は、開口側に延びる第1の嵌合構成部と、この第1の嵌合構成部から反開口側に折り曲げられた第2の嵌合構成部と、この第2の嵌合構成部から開口側に折り曲げられた第3の嵌合構成部と、この第3の嵌合構成部から前記壁板と並行に外側に突出して折り曲げられた突出部と、を備え、前記被嵌合部は、開口側に延びる第1の被嵌合構成部と、この第1の被嵌合構成部から反開口側に折り曲げられた第2の被嵌合構成部と、この第2の被嵌合構成部から開口側に折り曲げられた第3の被嵌合構成部と、前記第2の被嵌合構成部と第3の嵌合構成部との間に前記壁板と並行に溝状に折り曲げられた溝部と、を備える、ことを特徴とする。 Further, in the invention of claim 3, the fitting portion includes a first fitting component extending to the opening side, and a second fitting component bent from the first fitting component to the side opposite to the opening. , A third fitting component bent to the opening side from the second fitting component, and a protrusion protruding outward from the third fitting component in parallel with the wall plate A first fitted component that extends to the opening side, and a second fitted member that is bent from the first fitted component to the side opposite to the opening. Between the component, the third fitted component bent from the second fitted component to the opening side, and the second fitted component and the third fitted component And a groove portion bent in a groove shape in parallel with the wall plate.

請求項の発明は、請求項3に記載のダクトにおいて、前記突出部から、前記壁板に対して垂直に延びる嵌合側フランジ部が形成され、前記溝部から、前記壁板に対して垂直に延びる被嵌合側フランジ部が形成され、前記嵌合側フランジ部と被嵌合側フランジ部には、ボルトを挿入する挿入孔が形成されている、ことを特徴とする。 According to a fourth aspect of the present invention, in the duct according to the third aspect, a fitting-side flange portion extending perpendicularly to the wall plate is formed from the protruding portion, and the vertical portion is perpendicular to the wall plate from the groove portion. A fitting-side flange portion is formed, and insertion holes for inserting bolts are formed in the fitting-side flange portion and the fitting-side flange portion.

また、本発明は、壁板が四方に配設された筒状で、開口端縁から前記壁板に対して垂直に延びるフランジ部が形成されたダクト同士を、開口端部が互いに接するように接続するダクト接続構造であって、一方のダクトのフランジ部に、該フランジ部が折り曲げられて開口端縁に沿って延びる凸状の嵌合部が形成され、他方のダクトのフランジ部に、該フランジ部が折り曲げられて開口端縁に沿って延びる凹状の被嵌合部が形成され、前記嵌合部が前記被嵌合部内に嵌合することで、前記一方のダクトと前記他方のダクトとが接続されてもよい Further, the present invention is a cylindrical shape in which wall plates are arranged in four directions, and the opening end portions are in contact with each other with ducts formed with flange portions extending perpendicularly to the wall plate from the opening edge. A duct connection structure for connecting, wherein a flange-shaped flange portion of one duct is bent to form a convex fitting portion extending along an opening edge, and the flange portion of the other duct has the flange portion A flanged portion is bent to form a recessed fitted portion extending along the opening edge, and the fitting portion is fitted into the fitted portion, whereby the one duct and the other duct are There may be connected.

さらに、本発明は、壁板が四方に配設された筒状で、両端の開口端縁から前記壁板に対して垂直に延びるフランジ部が形成されたダクトであって、一方のフランジ部に、該フランジ部が折り曲げられて開口端縁に沿って延びる凸状の嵌合部が形成され、他方のフランジ部に、該フランジ部が折り曲げられて開口端縁に沿って延びる凹状の被嵌合部が形成され、前記嵌合部が前記被嵌合部内に嵌合可能となっていてもよい Further, the present invention is a duct having a cylindrical wall plate arranged in four directions, and a flange portion formed perpendicularly to the wall plate from the opening edge of both ends, wherein one flange portion has The flange portion is bent to form a convex fitting portion that extends along the opening edge, and the other flange portion is bent to fit the concave fitting portion that extends along the opening edge. parts are formed, the fitting portion may be made fittable into the fitted portion.

請求項1およびに記載の発明によれば、ダクト同士の開口端部を突き合わせた一方の凸状の嵌合部と、他方の凹状の被嵌合部と、がお互い嵌合されてダクト同士が接続される構造のため、地震などの衝撃が加わっても、嵌合部と被嵌合部との篏合により負荷が抑えられてコーナーピースが外れることがなく、ダクト接続部のズレを防止できる。 According to invention of Claim 1 and 3 , one convex fitting part which faced | matched the opening edge part of ducts, and the other concave fitting part are mutually fitted, and ducts mutually Because the structure is connected, even if an impact such as an earthquake is applied, the load is suppressed by the mating of the mating part and mated part, and the corner piece does not come off, preventing the duct connection part from shifting it can.

また、請求項1および3に記載の発明によれば、複数折り曲げられて補強させた折り曲げ部を介して突出部と溝部とが形成されるため、十分な強度を備え、地震などの衝撃にも変形することなく耐えることができる。 In addition, according to the first and third aspects of the present invention, since the protruding portion and the groove portion are formed through the bent portion which is bent and reinforced, it has sufficient strength and can be used for an impact such as earthquake. It can withstand without deformation.

請求項2および4に記載の発明によれば、突出部と溝部との篏合とともに当接する嵌合側フランジ部と被嵌合側フランジ部とを、ボルトを介して固定させるため、コーナーピースの外れやダクトのズレを確実に抑えることができる。 According to invention of Claim 2 and 4 , in order to fix the fitting side flange part and the to-be-fitted side flange part which contact | abut with the coupling | bonding of a protrusion part and a groove part via a volt | bolt, Detachment and duct displacement can be reliably suppressed.

また、上述したように、フランジ部に設けた凸状の嵌合部および凹状の被嵌合部を利用する場合には、請求項1、と同様に、凸状の嵌合部と凹状の被嵌合部とが嵌合した状態でダクト同士が接続されるため、地震などによる外力・衝撃が加わっても、ダクト同士の接続がずれたり外れたりするのを防止することができる。しかも、フランジ部に嵌合部と被嵌合部とが形成されているため、外部から嵌合部や被嵌合部が見易く、嵌合部と被嵌合部との嵌合を容易かつ迅速に行うことが可能となる。 In addition, as described above, when the convex fitting portion and the concave mating portion provided on the flange portion are used, the convex fitting portion and the concave fitting portion are provided as in the first and third aspects. Since the ducts are connected in a state in which the fitted portion is fitted, the connection between the ducts can be prevented from being shifted or disconnected even when an external force or impact due to an earthquake or the like is applied. In addition, since the fitting portion and the fitted portion are formed on the flange portion, the fitting portion and the fitted portion can be easily seen from the outside, and the fitting portion and the fitted portion can be easily and quickly fitted. Can be performed.

この発明の実施の形態1に係るダクトの構造を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the duct which concerns on Embodiment 1 of this invention. 図1の篏合部と被篏合部とを詳しく示す拡大斜視図であり、(a)は篏合部を、(b)は被篏合部を、各々示している。It is an expansion perspective view which shows in detail the joining part and to-be-joined part of FIG. 1, (a) has shown the joining part, (b) has shown the to-be-joined part, respectively. 図2の篏合部と被篏合部との折り曲げ状態を示す側面図であり、(a)は篏合部を、(b)は被篏合部を、各々示している。It is a side view which shows the bending state of the joining part and to-be-joined part of FIG. 2, (a) has shown the joining part, (b) has shown the to-be-joined part, respectively. 図1に示したダクトを組立てた状態を示す組立て図であり、(a)は篏合部側を、(b)は被篏合部側を、各々示している。It is an assembly figure which shows the state which assembled the duct shown in FIG. 1, (a) has shown the joining part side, (b) has shown the to-be-joined part side, respectively. 図1のダクトを一対に突き合わせて接続させる動作を示す斜視図である。It is a perspective view which shows the operation | movement which abuts and connects a pair of duct of FIG. この発明の実施の形態2に係るダクトを示す斜視図である。It is a perspective view which shows the duct which concerns on Embodiment 2 of this invention. 図6のダクトにおける嵌合部と被嵌合部とを示す斜視図である。It is a perspective view which shows the fitting part and to-be-fitted part in the duct of FIG. 図6のダクトにおける被嵌合部側のコーナーピースを示す斜視図である。It is a perspective view which shows the corner piece by the side of the to-be-fitted part in the duct 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。   The present invention will be described below based on the illustrated embodiments.

(実施の形態1)
図1は、この実施の形態に係るダクト1の構造を示す分解斜視図である。また、図2は、図1の篏合部12と被篏合部13とを詳しく示す拡大斜視図であり、(a)は篏合部12を、(b)は被篏合部13を、各々示している。また、図3は、図2の篏合部12と被篏合部13との折り曲げ状態を示す側面図であり、(a)は篏合部12を、(b)は被篏合部13を、各々示している。この発明の実施の形態に係るダクト1は、図1に示すように、空調用あるいは吸排気用などに用いられおり、4つの壁板10を四方に配設させて、お互いが隣接する側面をハゼなどにより接合することで筒状とし、この筒状両端の開口断面が矩形断面を有するように組立てられている。
(Embodiment 1)
FIG. 1 is an exploded perspective view showing the structure of the duct 1 according to this embodiment. 2 is an enlarged perspective view showing in detail the mating portion 12 and the mated portion 13 of FIG. 1, wherein (a) shows the mated portion 12, (b) shows the mated portion 13, and FIG. Each is shown. 3 is a side view showing a bent state of the mating portion 12 and the mated portion 13 of FIG. 2, wherein (a) shows the mated portion 12 and (b) shows the mated portion 13. , Each showing. The duct 1 according to the embodiment of the present invention is used for air conditioning or intake / exhaust as shown in FIG. 1, and four wall plates 10 are arranged in four directions so that side surfaces adjacent to each other are arranged. It joins with a goby etc., it is set as a cylinder, and it is assembled so that the opening cross section of this cylindrical both ends may have a rectangular cross section.

この壁板10は、図1に示したように板状で鋼板材からなり四方に配設されて、お互い隣接する側縁部を接合させるハゼなどの接合部11が備えられている。また、壁板10には、この接合部11の両端縁部を複数折り曲げ、一方の開口端縁(図1の右側)に沿って延びる(突出させた)凸状の嵌合部12と、他方の開口端縁(図1の左側)に沿って延びる(凹ませた)凹状の被嵌合部13と、が各々形成されている。   As shown in FIG. 1, the wall plate 10 is formed of a plate-like steel plate material and is arranged in four directions. The wall plate 10 includes a joint 11 such as a goby that joins adjacent side edges. In addition, the wall plate 10 has a convex fitting portion 12 which is bent (protruded) along one opening end edge (the right side in FIG. 1), and the other end edge portion of the joint portion 11 is bent. And a recessed fitting portion 13 extending (recessed) along the opening edge (left side in FIG. 1).

このような嵌合部12と被嵌合部13とは、お互いに嵌合可能に形成されており、ダクト1同士を突き合わせた際に、例えば、一方のダクト1の嵌合部12と、他方のダクト1の被嵌合部13と、が各々篏合して接続されることで、ダクト1同士の接続部でのズレを確実に防止できるダクト接続構造に構成されている。   The fitting portion 12 and the fitted portion 13 are formed so as to be fitted to each other. When the ducts 1 are brought into contact with each other, for example, the fitting portion 12 of one duct 1 and the other By connecting the mated portions 13 of the ducts 1 to each other and connecting them, a duct connection structure that can surely prevent the displacement at the connection portions between the ducts 1 is configured.

より具体的に、嵌合部12と被嵌合部13とは、図2に示すように、壁板10の端部を複数回折り曲げることで、この端部でお互い篏合する際の強度を確保できるように形成するとともに、鋼板を容易に加工できるように最小限の折り返しでダクト接続構造を構成できるようになっている。   More specifically, as shown in FIG. 2, the fitting portion 12 and the fitted portion 13 have a plurality of bending portions of the end portion of the wall plate 10 so that the strength when mating with each other at the end portion is increased. The duct connection structure can be configured with minimum folding so that the steel sheet can be easily processed while being formed so as to be secured.

まず、嵌合部12は、図2(a)に示すように、第1の嵌合構成部12a、第2の嵌合構成部12b、第3の嵌合構成部12c、突出部12dの順に折り曲げられて形成されている。第1の嵌合構成部12aは、ダクト1の筒状開口側の縁部を垂直方向に所定の高さの段差を形成して突出するように折り曲げられている。第2の嵌合構成部12bは、第1の嵌合構成部12aから延びて離間した所定位置で反開口側に折り曲げられている。第3の嵌合構成部12cは、第2の嵌合構成部12bから第1の嵌合構成部12aの段差側に延びて、この段差の近傍でさらに開口側に折り曲げられている。最後に、突出部12dは、第3の嵌合構成部12cから壁板10と並行に外側(開口側)に突出して折り返すように折り曲げられている。   First, as shown in FIG. 2A, the fitting portion 12 is formed in the order of the first fitting component 12a, the second fitting component 12b, the third fitting component 12c, and the protruding portion 12d. It is formed by bending. The first fitting component 12a is bent so that the edge of the duct 1 on the cylindrical opening side protrudes in a vertical direction with a step having a predetermined height. The second fitting component 12b is bent to the non-opening side at a predetermined position extending from the first fitting component 12a and spaced apart. The third fitting component 12c extends from the second fitting component 12b to the step side of the first fitting component 12a, and is further bent toward the opening in the vicinity of the step. Finally, the protruding portion 12d is bent so as to protrude outward from the third fitting component 12c in parallel with the wall plate 10 (opening side) and be turned back.

一方、被嵌合部13は、図2(b)に示すように、第1の被嵌合構成部13a、第2の被嵌合構成部13b、第3の被嵌合構成部13c、溝部13dの順に折り曲げられて形成されている。第1の被嵌合構成部13aは、ダクト1の筒状開口側に延びて垂直方向に所定の高さの段差を形成して突出するように折り曲げられている。第2の被嵌合構成部13bは、第1の被嵌合構成部13aから延びて離間した所定位置で反開口側に折り曲げられている。第3の被嵌合構成部13cは、第2の被嵌合構成部13bから第1の被嵌合構成部13aの段差側に延びて、この段差の近傍でさらに開口側に折り曲げられている。最後に、溝部13dは、図2(b)に示した第2の被嵌合構成部13bの下面と第3の嵌合構成部13cの下面との間に、壁板10と並行に溝状(反開口側に凹む溝状)に折り曲げられている。   On the other hand, as shown in FIG. 2B, the fitted portion 13 includes a first fitted component 13a, a second fitted component 13b, a third fitted component 13c, and a groove. It is formed by bending in the order of 13d. The first fitted component 13a is bent so as to extend to the cylindrical opening side of the duct 1 and protrude in a vertical direction with a predetermined height. The second fitted component 13b is bent to the non-opening side at a predetermined position extending and spaced from the first fitted component 13a. The third fitted component 13c extends from the second fitted component 13b to the step side of the first fitted component 13a, and is further bent toward the opening in the vicinity of the step. . Finally, the groove 13d is formed in a groove shape in parallel with the wall plate 10 between the lower surface of the second fitted component 13b and the lower surface of the third fitted component 13c shown in FIG. It is bent into a groove shape recessed in the opposite opening side.

そして、突出部12dおよび溝部13dから延びた端部には、壁板10に対して垂直方向に折り曲げて、図1に示した筒状開口端の四辺で各々外方へ曲げて、ダクト1を接続するための嵌合側フランジ部12eと被嵌合側フランジ部13eとが各々備えられている。この嵌合側フランジ部12eと被嵌合側フランジ部13eとは、ダクト1の接続時にボルト2(図5参照)を挿入して接続させるために、図2に示したボルト2挿入用の孔12f、13fが中央部に各々開口されている。   The end portions extending from the projecting portions 12d and the groove portions 13d are bent in the direction perpendicular to the wall plate 10 and bent outward at the four sides of the cylindrical opening end shown in FIG. The fitting side flange part 12e and the to-be-fitted side flange part 13e for connection are each provided. The fitting-side flange portion 12e and the fitted-side flange portion 13e are provided with the bolt 2 insertion holes shown in FIG. 2 in order to insert and connect the bolt 2 (see FIG. 5) when the duct 1 is connected. 12f and 13f are each opened in the center.

また、図2に示した第1〜3の嵌合構成部12a〜dと第1〜3の被嵌合構成部13a〜dとの折り曲げ部は、壁板10が一定の板厚であるため、図3に示すように、折り返した上下に隙間がほぼなく押し潰したような状態で折り曲げられている。すなわち、壁板10の開口端部を折り重ねてほぼ一枚の鋼板のように潰して形成させることで、強度を十分に確保している。これにより、地震などの負荷に対しても十分な強度を有し、突出部12dと溝部13dとが容易に外れないよう篏合できる。   Moreover, since the wall board 10 is a fixed board thickness in the bending part of the 1st-3rd fitting components 12a-d and the 1st-3rd to-be-fitted components 13a-d shown in FIG. As shown in FIG. 3, it is folded in a state where it is crushed with almost no gap between the folded top and bottom. That is, the opening end portion of the wall plate 10 is folded and formed so as to be crushed almost like a single steel plate, thereby ensuring sufficient strength. Thereby, it has sufficient intensity | strength also with respect to loads, such as an earthquake, and can match | combine so that the protrusion part 12d and the groove part 13d may not remove | deviate easily.

また、嵌合側フランジ部12eと被嵌合側フランジ部13eとには、図1に示したように板状でL字形のコーナーピース20が挿入され、ダクト1の開口端部の四隅を補強するようになっている。このコーナーピース20は、従来技術と同様にボルト2を介して固定できるように孔20aが開口されている。すなわち、本実施の形態では、嵌合側フランジ部12と被嵌合側フランジ部13との孔12f、13f(図2参照)によるボルト2固定と、コーナーピース20の孔20aによるダクト1四隅のボルト2固定とにより確実に固定され、従来必要とされていたクリップを不要としている。   Further, as shown in FIG. 1, plate-like and L-shaped corner pieces 20 are inserted into the fitting-side flange portion 12 e and the fitted-side flange portion 13 e to reinforce the four corners of the opening end portion of the duct 1. It is supposed to be. The corner piece 20 has a hole 20a so that the corner piece 20 can be fixed via the bolt 2 as in the prior art. That is, in this embodiment, the bolts 2 are fixed by the holes 12f and 13f (see FIG. 2) between the fitting side flange portion 12 and the fitting side flange portion 13, and the four corners of the duct 1 are formed by the holes 20a of the corner piece 20. It is securely fixed by the bolt 2 fixing, and the clip which has been conventionally required is unnecessary.

この際、嵌合側フランジ部12eは、図3(a)に示したように、コーナーピース20を挿入させる幅D1aが形成されている。この幅D1aは、嵌合側フランジ部12e側の折り曲げ位置と、第2の嵌合構成部12b側の折り曲げ位置と、を調整することで形成されている。嵌合側フランジ部12e側は、突出部12dから幅D2aの長さで延びた先端を略直角に折り曲げて幅D3aの端面12e−1を形成し、この先端をさらに反対側に折り曲げた幅D4aの先端部12e−2を備えている。そして、この先端部12e−2を折り曲げた際に、端部が幅D1aの位置になるように調整されている。また、第2の嵌合構成部12b側は、第1の嵌合構成部12aから反対側に折り曲げられる端部が、幅D1aの位置になるように調整されている。すなわち、幅D1aに挿入されたコーナーピース20は、先端部12e−2と第2の嵌合構成部12bとの折り曲げ端部により位置決めされる。   At this time, the fitting-side flange portion 12e is formed with a width D1a into which the corner piece 20 is inserted, as shown in FIG. The width D1a is formed by adjusting the folding position on the fitting flange portion 12e side and the folding position on the second fitting component portion 12b side. On the fitting side flange portion 12e side, the end surface 12e-1 having a width D3a is formed by bending the tip extending from the protruding portion 12d with a length of the width D2a at a substantially right angle, and the width D4a is further bent to the opposite side. Tip portion 12e-2. And when this front-end | tip part 12e-2 is bent, it adjusts so that an edge part may be in the position of the width | variety D1a. Further, the second fitting component 12b side is adjusted so that the end bent from the first fitting component 12a to the opposite side is positioned at the width D1a. That is, the corner piece 20 inserted into the width D1a is positioned by the bent end portion of the tip end portion 12e-2 and the second fitting component portion 12b.

そして、この各幅D1a〜D5aの寸法は、幅D2aが約36mm、幅D3aが約8.5〜9mm、幅D4aが約4mmに設定され、これにより幅D1aが約2〜3mmに設定されることが好ましい。また、突出部12dが突出する長さ(幅)D5aは、約12mmに設定されることが好ましい。   The dimensions of the widths D1a to D5a are set such that the width D2a is about 36 mm, the width D3a is about 8.5 to 9 mm, and the width D4a is about 4 mm, thereby setting the width D1a to about 2 to 3 mm. It is preferable. The length (width) D5a from which the protruding portion 12d protrudes is preferably set to about 12 mm.

一方、被嵌合側フランジ部13eにも、図3(b)に示したように、コーナーピース20を挿入する幅D1bが形成されている。この幅D1bは、被嵌合側フランジ部13e側の折り曲げ位置と、第2の被嵌合構成部13b側の折り曲げ位置と、を調整することで形成されている。この被嵌合側フランジ部13e側は、溝部13dから幅D2bの長さで延びた先端を略直角に折り曲げて幅D3bの端面13e−1を形成し、この先端をさらに反対側に折り曲げた幅D4bの先端部13e−2を備えている。そして、この先端部13e−2を折り曲げた際に、端部が幅D1bの位置になるように調整されている。また、第2の被嵌合構成部13b側は、第1の被嵌合構成部13aから反対側に折り曲げられる端部が、幅D1bの位置になるように調整されている。すなわち、幅D1bに挿入されたコーナーピース20は、先端部13e−2と第2の嵌合構成部13bとの折り曲げ端部により位置決めされる。   On the other hand, as shown in FIG. 3B, a width D1b into which the corner piece 20 is inserted is also formed in the fitted side flange portion 13e. The width D1b is formed by adjusting the folding position on the fitted flange portion 13e side and the folding position on the second fitted component 13b side. The fitted flange portion 13e side has an end surface 13e-1 having a width D3b formed by bending a tip extending from the groove portion 13d with a length of the width D2b substantially at a right angle, and the tip is further bent to the opposite side. D4b has a tip portion 13e-2. And when this front-end | tip part 13e-2 is bent, it adjusts so that an edge part may be in the position of the width | variety D1b. Further, the second fitted component 13b side is adjusted so that the end bent from the first fitted component 13a to the opposite side is positioned at the width D1b. That is, the corner piece 20 inserted into the width D1b is positioned by the bent end portion of the tip portion 13e-2 and the second fitting component portion 13b.

そして、この各幅D1b〜D5bの寸法は、幅D2bが約36mm、幅D3bが約8.5〜9mm、幅D4bが約4mmに設定され、これにより幅D1bが約2〜3mmに設定されることが好ましい。また、溝部13dが凹状に凹む深さ(幅)D5bは、約15mmに設定されることが好ましい。   The dimensions of the widths D1b to D5b are set such that the width D2b is about 36 mm, the width D3b is about 8.5 to 9 mm, and the width D4b is about 4 mm, thereby setting the width D1b to about 2 to 3 mm. It is preferable. Further, the depth (width) D5b in which the groove 13d is recessed is preferably set to about 15 mm.

このように本実施の形態では、突出部12dと溝部13dとが十分な強度を有するように折り曲げるだけではなく、この折り曲げによる新たな幅D1a、D1bを形成してコーナーピース20を固定できるように形成されている。   As described above, in the present embodiment, not only the protruding portion 12d and the groove portion 13d are bent so as to have sufficient strength, but also new widths D1a and D1b are formed by the bending so that the corner piece 20 can be fixed. Is formed.

次に、このような構成からなるダクト接続構造を用いてダクト1同士を接続する動作について、図4および5を参照して詳しく説明する。図4は、図1に示したダクト1を組立てた状態を示す組立て図であり、(a)は篏合部12側を、(b)は被篏合部13側を、各々示している。また、図5は、図1のダクト1を一対に突き合わせて接続させる動作を示す斜視図である。   Next, the operation | movement which connects the ducts 1 using the duct connection structure which consists of such a structure is demonstrated in detail with reference to FIG. 4A and 4B are assembly views showing a state where the duct 1 shown in FIG. 1 is assembled. FIG. 4A shows the mating portion 12 side, and FIG. 4B shows the mating portion 13 side. FIG. 5 is a perspective view showing an operation of connecting the duct 1 of FIG.

まず、図1に示した壁板10を四方に各々配置させて壁板10の各辺で隣接するハゼなどの接合部11を接合させて筒状に展開させる。この際、図3に示した嵌合側フランジ部12eと被嵌合側フランジ部13eとの幅D1a、D1bに、図1に示したコーナーピース20を差し込むことで、ダクト1の開口端部の四隅に各々装着させる。ここで、コーナーピース20は、嵌合側フランジ部12eと被嵌合側フランジ部13eとの幅D1a、D1bに差し込んだ後、ダクト1用のパテなどで接着され、嵌合側フランジ部12eと被嵌合側フランジ部13eとに各々固定される。   First, the wall plates 10 shown in FIG. 1 are arranged in four directions, and the joining portions 11 such as goby adjacent to each side of the wall plate 10 are joined and developed into a cylindrical shape. At this time, by inserting the corner piece 20 shown in FIG. 1 into the widths D1a and D1b between the fitting side flange portion 12e and the fitted side flange portion 13e shown in FIG. Attach to each corner. Here, after the corner piece 20 is inserted into the widths D1a and D1b between the fitting side flange portion 12e and the fitting side flange portion 13e, the corner piece 20 is bonded with a putty for the duct 1, and the like. It is each fixed to the to-be-fitted side flange portion 13e.

このように壁板10を四方に各々配置させて組立てられたダクト1は、図4に示すように、筒状開口端部の四辺に、コーナーピース20、嵌合側フランジ部12e、突出部12d、被嵌合側フランジ部13e、溝部13dが、各々配置されてダクト接続構造が形成される。ここで、突出部12dは、図4(a)に示すように、嵌合側フランジ部12eが配置された開口端部の内周四辺から各々リブ状に突出するように配置される。一方、溝部13dは、図4(b)に示すように、被嵌合側フランジ部13eが配置された開口端部の内周四辺に沿って、凹状の溝が延びて開口周囲を囲むように配置される。これにより、本実施形態によるダクト接続構造を備えたダクト1の組立てが完了する。   As shown in FIG. 4, the duct 1 assembled by arranging the wall plates 10 in four directions in this way is provided with corner pieces 20, fitting-side flange portions 12 e, and projecting portions 12 d on the four sides of the cylindrical opening end. The fitted flange portion 13e and the groove portion 13d are arranged to form a duct connection structure. Here, as shown to Fig.4 (a), the protrusion part 12d is arrange | positioned so that it may protrude in the shape of a rib from the inner peripheral four sides of the opening edge part in which the fitting side flange part 12e is arrange | positioned. On the other hand, as shown in FIG. 4 (b), the groove 13d has a concave groove extending along the inner peripheral four sides of the opening end where the fitted side flange 13e is arranged so as to surround the periphery of the opening. Be placed. Thereby, the assembly of the duct 1 provided with the duct connection structure according to the present embodiment is completed.

次に、このように構成されたダクト接続構造によりダクト1を接続する動作を詳しく説明する。まず、図4に示したように、嵌合側フランジ部12eの突出部12dと、被嵌合側フランジ部13eの溝部13dと、が各々配設されたダクト1を一対に準備する。そして、図5に示すように、嵌合側フランジ部12eと被嵌合側フランジ部13eとをガスケット(図示せず)を介して突き合わせるように配置する。   Next, the operation of connecting the duct 1 by the duct connection structure thus configured will be described in detail. First, as shown in FIG. 4, a pair of ducts 1 is prepared in which a protruding portion 12d of the fitting-side flange portion 12e and a groove portion 13d of the fitted-side flange portion 13e are provided. And as shown in FIG. 5, it arrange | positions so that the fitting side flange part 12e and the to-be-fitted side flange part 13e may face | match via a gasket (not shown).

その後、一対のダクト1の突き合わせた開口端部の突出部12dと溝部13dとを、ダクト1の突き合せた開口端部の四辺で各々篏合されるように位置合わせして、お互いを篏合させる。これにより嵌合側フランジ部12eと被嵌合側フランジ部13eとの孔12f、13fの位置が合致してボルト2およびナット3により固定される。同時に、各フランジ部の四隅に装着したL形のコーナーピース20の孔20aも合致してボルト2およびナット3により固定される。これにより一対のダクト1同士が接続され、このダクト接続構造による接続工程を繰り返すことで、一定の長さのダクト1が組立てられ、ダクトの接続作業が完了する。その後、この一定の長さに接続されたダクト1は、所定の設置場所に運んで設置される。   After that, the projecting portion 12d and the groove portion 13d at the opening end of the pair of ducts 1 are aligned so as to be joined at the four sides of the opening end at which the duct 1 is abutted, and are joined together. Let As a result, the positions of the holes 12f and 13f of the fitting-side flange portion 12e and the fitted-side flange portion 13e are matched and fixed by the bolt 2 and the nut 3. At the same time, the holes 20a of the L-shaped corner piece 20 mounted at the four corners of each flange portion are also matched and fixed by the bolt 2 and the nut 3. As a result, the pair of ducts 1 are connected to each other, and by repeating the connection process using this duct connection structure, the duct 1 having a certain length is assembled, and the duct connection work is completed. Thereafter, the duct 1 connected to the predetermined length is carried to a predetermined installation place and installed.

以上のように、このダクト1およびダクト接続構造によれば、ダクト1同士の開口端部を突き合わせた一方の凸状の嵌合部12(突出部12d)と、他方の凹状の被嵌合部13(溝部13d)と、がお互い嵌合されてダクト1同士が接続される構造のため、地震などの衝撃が加えられても、嵌合部12と被嵌合部13との篏合により負荷が抑えられてコーナーピース20が外れることがなく、ダクト1接続部のズレを防止できる。   As described above, according to the duct 1 and the duct connection structure, one convex fitting portion 12 (protruding portion 12d) in which the opening end portions of the ducts 1 are butted and the other concave fitting portion. 13 (groove portion 13d) are connected to each other and the ducts 1 are connected to each other. Is suppressed and the corner piece 20 is not detached, and the displacement of the connecting portion of the duct 1 can be prevented.

また、このダクト1およびダクト接続構造によれば、ダクト1の開口端部を複数折り曲げて補強させた折り曲げ部を介して突出部12dと溝部13dとが形成されるため、十分な強度を備え、地震などの衝撃にも変形することなく耐えることができる。   Further, according to the duct 1 and the duct connection structure, since the protruding portion 12d and the groove portion 13d are formed through the bent portion in which the opening end portion of the duct 1 is bent and reinforced, the strength is sufficient. It can withstand impacts such as earthquakes without deformation.

さらに、このダクト1およびダクト接続構造によれば、突出部12dと溝部13dとの篏合とともに当接する嵌合側フランジ部12eと被嵌合側フランジ部13eとの孔12f、13fに、ボルト2を介して固定させるため、コーナーピース20の外れやダクト1のズレを確実に抑えることができる。   Further, according to the duct 1 and the duct connection structure, the bolt 2 Therefore, it is possible to reliably prevent the corner piece 20 from being detached and the duct 1 from being displaced.

(実施の形態2)
図6は、この実施の形態に係るダクト100を示す斜視図である。この実施の形態では、各壁板110のフランジ部120に、嵌合部130と被嵌合部140とが形成されている点で、実施の形態1と構成が異なる。
(Embodiment 2)
FIG. 6 is a perspective view showing the duct 100 according to this embodiment. This embodiment is different from the first embodiment in that a fitting portion 130 and a fitted portion 140 are formed on the flange portion 120 of each wall plate 110.

すなわち、図7に示すように、壁板110の両端に、開口端縁から壁板110に対して垂直に外側に延びるフランジ部120が形成され、一方のフランジ部120に、このフランジ部120が折り曲げられて開口端縁に沿って延びる凸状の嵌合部130が形成されている。具体的には、断面が外側(反壁板110側)に突出する逆U字状になり、この逆U字形がフランジ部120の長手方向に沿って延びるように、フランジ部120を折り曲げて嵌合部130が形成されている。   That is, as shown in FIG. 7, flange portions 120 extending outward from the opening edge perpendicularly to the wall plate 110 are formed at both ends of the wall plate 110, and the flange portions 120 are formed on one flange portion 120. A convex fitting portion 130 that is bent and extends along the edge of the opening is formed. Specifically, the flange portion 120 is folded and fitted so that the cross-section becomes an inverted U shape protruding outward (on the opposite wall plate 110 side), and the inverted U shape extends along the longitudinal direction of the flange portion 120. A joint portion 130 is formed.

一方、他方のフランジ部120に、このフランジ部120が折り曲げられて開口端縁に沿って延びる凹状の被嵌合部140が形成されている。具体的には、断面が内側(壁板110側)に突出するU字状になり、このU字形がフランジ部120の長手方向に沿って延びるように、フランジ部120を折り曲げて被嵌合部140が形成されている。そして、嵌合部130が被嵌合部140内に嵌合するように、嵌合部130および被嵌合部140が形成されている。   On the other hand, a concave fitted portion 140 is formed on the other flange portion 120 by bending the flange portion 120 and extending along the opening edge. Specifically, the flange portion 120 is bent so that the cross-section becomes a U-shape projecting inward (on the wall plate 110 side), and this U-shape extends along the longitudinal direction of the flange portion 120. 140 is formed. And the fitting part 130 and the to-be-fitted part 140 are formed so that the fitting part 130 may be fitted in the to-be-fitted part 140.

また、この実施の形態では、嵌合部130側のフランジ部120間に取り付けられるコーナーピース20は、実施の形態1と同じ構成であるが、被嵌合部140側のフランジ部120間に取り付けられるコーナーピース150は、図8に示すように構成が異なる。すなわち、直角に延びる2つの腕部150aにコーナー凹部151が形成されている。このコーナー凹部151は、断面がU字状で腕部150aの長手方向に沿って延びるように形成され、コーナー凹部151内に被嵌合部140が嵌合するように形成されている。   Further, in this embodiment, the corner piece 20 attached between the flange portions 120 on the fitting portion 130 side has the same configuration as that of the first embodiment, but is attached between the flange portions 120 on the fitting portion 140 side. The corner piece 150 is different in configuration as shown in FIG. That is, the corner recess 151 is formed in the two arm portions 150a extending at right angles. The corner recess 151 has a U-shaped cross section and extends along the longitudinal direction of the arm portion 150a. The corner recess 151 is formed so that the fitted portion 140 is fitted in the corner recess 151.

このようなダクト100同士を接続するには、コーナーピース20、150をフランジ部120間に取り付け、図6に示すように、一方のダクト100の嵌合部130を、他方のダクト100の被嵌合部140内に嵌合させる。そして、実施の形態1と同様に、対向するコーナーピース20、150をボルト、ナットで締結し、さらに、対向するフランジ部120をボルト、ナットで締結する。   In order to connect the ducts 100 to each other, the corner pieces 20 and 150 are attached between the flange parts 120, and the fitting part 130 of one duct 100 is fitted to the fitting part 130 of the other duct 100 as shown in FIG. Fit into the joint 140. Then, as in the first embodiment, the opposing corner pieces 20 and 150 are fastened with bolts and nuts, and the opposing flange portion 120 is fastened with bolts and nuts.

このようにこの実施の形態によれば、実施の形態1と同様に、凸状の嵌合部130と凹状の被嵌合部140とが嵌合した状態でダクト100同士が接続されるため、地震などによる外力・衝撃が加わっても、ダクト100同士の接続がずれたり外れたりするのを防止することができる。しかも、外側に突出するフランジ部120に、嵌合部130と被嵌合部140とが形成されているため、外部から嵌合部130や被嵌合部140が見易く、嵌合部130と被嵌合部140との嵌合を容易かつ迅速に行うことが可能となり、作業性が向上する。   Thus, according to this embodiment, the ducts 100 are connected with each other in a state where the convex fitting part 130 and the concave fitting part 140 are fitted, as in the first embodiment. Even when an external force / impact is applied due to an earthquake or the like, the connection between the ducts 100 can be prevented from being shifted or disconnected. In addition, since the fitting portion 130 and the fitted portion 140 are formed on the flange portion 120 protruding outward, the fitting portion 130 and the fitted portion 140 are easily visible from the outside, and the fitting portion 130 and the covered portion 140 are covered. The fitting with the fitting portion 140 can be easily and quickly performed, and the workability is improved.

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、ダクト1の筒状の開口端部両側に突出部12dと溝13dとを各々配置させた構造について説明しているが、これに限定されず、ダクト1の接続状況(例えば、ダクト1を長く接続させた最後の開口端部など)に応じて筒状の開口端部両側のいずれか片方に突出部12dまたは溝13dの一方のみを形成することも可能である。   Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above-described embodiment, the structure in which the projecting portions 12d and the grooves 13d are respectively arranged on both sides of the cylindrical opening end portion of the duct 1 is described. It is also possible to form only one of the protruding portion 12d or the groove 13d on either side of the cylindrical opening end depending on the situation (for example, the last opening end where the duct 1 is long connected). .

また、突出部12dおよび溝13dは、ダクト1の開口端部の四辺全周に設けることに限定されるものではなく、例えば、負荷が加わる状況に応じて上下または左右の二辺だけに設けることも可能である。   Further, the protruding portion 12d and the groove 13d are not limited to being provided on the entire circumference of the four sides of the opening end portion of the duct 1, and for example, provided on only the upper and lower sides or the left and right sides according to the load application condition. Is also possible.

1 ダクト
2 ボルト
3 ナット
10 壁板
11 接合部
12 篏合部
12a 第1の嵌合構成部
12b 第2の嵌合構成部
12c 第3の嵌合構成部
12d 突出部
12e 嵌合側フランジ部
12f 孔
13 被篏合部
13a 第1の被嵌合構成部
13b 第2の被嵌合構成部
13c 第3の被嵌合構成部
13d 溝部
13e 被嵌合側フランジ部
13f 孔
100 ダクト
110 壁板
120 フランジ部
130 嵌合部
140 被嵌合部
150 コーナーピース
DESCRIPTION OF SYMBOLS 1 Duct 2 Bolt 3 Nut 10 Wall board 11 Joint part 12 Joint part 12a 1st fitting structure part 12b 2nd fitting structure part 12c 3rd fitting structure part 12d Protrusion part 12e Fitting side flange part 12f Hole 13 Mated portion 13a First fitted component 13b Second fitted component 13c Third fitted component 13d Groove portion 13e Fitted side flange portion 13f Hole 100 Duct 110 Wall plate 120 Flange part 130 fitting part 140 fitted part 150 corner piece

Claims (4)

壁板が四方に配設された筒状のダクト同士を、開口端部が互いに接するように接続するダクト接続構造であって、
一方のダクトの開口端部に、前記壁板が折り曲げられて開口端縁に沿って延びる凸状の嵌合部が形成され、
他方のダクトの開口端部に、前記壁板が折り曲げられて開口端縁に沿って延びる凹状の被嵌合部が形成され、
前記嵌合部が前記被嵌合部内に嵌合することで、前記一方のダクトと前記他方のダクトとが接続されるようになっており、
前記嵌合部は、開口側に延びる第1の嵌合構成部と、この第1の嵌合構成部から反開口側に折り曲げられた第2の嵌合構成部と、この第2の嵌合構成部から開口側に折り曲げられた第3の嵌合構成部と、この第3の嵌合構成部から前記壁板と並行に外側に突出して折り曲げられた突出部と、を備え、
前記被嵌合部は、開口側に延びる第1の被嵌合構成部と、この第1の被嵌合構成部から反開口側に折り曲げられた第2の被嵌合構成部と、この第2の被嵌合構成部から開口側に折り曲げられた第3の被嵌合構成部と、前記第2の被嵌合構成部と第3の嵌合構成部との間に前記壁板と並行に溝状に折り曲げられた溝部と、を備える、
ことを特徴とするダクト接続構造。
A duct connection structure for connecting cylindrical ducts, in which wall plates are arranged in four directions, so that the open ends are in contact with each other,
On the opening end of one duct, the wall plate is bent to form a convex fitting portion extending along the opening edge,
At the opening end of the other duct, a concave mating portion is formed that is bent along the opening edge by bending the wall plate,
The one duct and the other duct are connected by fitting the fitting part into the fitted part ,
The fitting portion includes a first fitting component extending to the opening side, a second fitting component bent from the first fitting component to the side opposite to the opening, and the second fitting A third fitting component bent from the component to the opening side, and a protruding portion bent outward from the third fitting component in parallel with the wall plate,
The fitted portion includes a first fitted component extending to the opening side, a second fitted component bent from the first fitted component to the non-opening side, and the first fitted component. A third fitted component bent to the opening side from the two fitted components, and parallel to the wall plate between the second fitted component and the third fitted component A groove portion bent into a groove shape,
A duct connection structure characterized by that.
前記突出部から、前記壁板に対して垂直に延びる嵌合側フランジ部が形成され、
前記溝部から、前記壁板に対して垂直に延びる被嵌合側フランジ部が形成され、
前記嵌合側フランジ部と被嵌合側フランジ部とがボルトを介して接続される、
ことを特徴とする請求項に記載のダクト接続構造。
A fitting side flange portion extending perpendicularly to the wall plate is formed from the protruding portion,
From the groove portion, a fitted side flange portion extending perpendicularly to the wall plate is formed,
The fitting side flange portion and the mating side flange portion are connected via a bolt,
The duct connection structure according to claim 1 .
壁板が四方に配設された筒状のダクトであって、
一方の開口端部に、前記壁板が折り曲げられて開口端縁に沿って延びる凸状の嵌合部が形成され、
他方の開口端部に、前記壁板が折り曲げられて開口端縁に沿って延びる凹状の被嵌合部が形成され、
前記嵌合部が前記被嵌合部内に嵌合可能となってい
前記嵌合部は、開口側に延びる第1の嵌合構成部と、この第1の嵌合構成部から反開口側に折り曲げられた第2の嵌合構成部と、この第2の嵌合構成部から開口側に折り曲げられた第3の嵌合構成部と、この第3の嵌合構成部から前記壁板と並行に外側に突出して折り曲げられた突出部と、を備え、
前記被嵌合部は、開口側に延びる第1の被嵌合構成部と、この第1の被嵌合構成部から反開口側に折り曲げられた第2の被嵌合構成部と、この第2の被嵌合構成部から開口側に折り曲げられた第3の被嵌合構成部と、前記第2の被嵌合構成部と第3の嵌合構成部との間に前記壁板と並行に溝状に折り曲げられた溝部と、を備える、
ことを特徴とするダクト。
A cylindrical duct with wallboards arranged in all directions,
On one opening end, the wall plate is bent to form a convex fitting portion extending along the opening edge,
On the other opening end, the wall plate is bent to form a recessed mating portion extending along the opening edge,
The fitting portion is has become possible fit within the fitted portion,
The fitting portion includes a first fitting component extending to the opening side, a second fitting component bent from the first fitting component to the side opposite to the opening, and the second fitting A third fitting component bent from the component to the opening side, and a protruding portion bent outward from the third fitting component in parallel with the wall plate,
The fitted portion includes a first fitted component extending to the opening side, a second fitted component bent from the first fitted component to the non-opening side, and the first fitted component. A third fitted component bent to the opening side from the two fitted components, and parallel to the wall plate between the second fitted component and the third fitted component A groove portion bent into a groove shape,
A duct characterized by that.
前記突出部から、前記壁板に対して垂直に延びる嵌合側フランジ部が形成され、
前記溝部から、前記壁板に対して垂直に延びる被嵌合側フランジ部が形成され、
前記嵌合側フランジ部と被嵌合側フランジ部には、ボルトを挿入する挿入孔が形成されている、
ことを特徴とする請求項に記載のダクト。
A fitting side flange portion extending perpendicularly to the wall plate is formed from the protruding portion,
From the groove portion, a fitted side flange portion extending perpendicularly to the wall plate is formed,
An insertion hole for inserting a bolt is formed in the fitting side flange portion and the fitted side flange portion,
The duct according to claim 3 .
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