JP2020118329A - Duct with reinforcing rib - Google Patents

Duct with reinforcing rib Download PDF

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JP2020118329A
JP2020118329A JP2019008379A JP2019008379A JP2020118329A JP 2020118329 A JP2020118329 A JP 2020118329A JP 2019008379 A JP2019008379 A JP 2019008379A JP 2019008379 A JP2019008379 A JP 2019008379A JP 2020118329 A JP2020118329 A JP 2020118329A
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reinforcing ribs
reinforcing rib
fitting
reinforcing
duct
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JP7185280B2 (en
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梶野　勇
Isamu Kajino
勇 梶野
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Shinfuji Kuuchou Co Ltd
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Shinfuji Kuuchou Co Ltd
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Abstract

To provide a duct with a reinforcing rib having a simple configuration and capable of being easily manufactured.SOLUTION: Four wall plates 2 to 5 are joined to form a substantially square cylindrical shape, air flows axially, the center part of respective wall plates 2 to 5 is folded in two and projects outward, reinforcing ribs 23, 33 extending in a direction substantially orthogonal to the axial direction are formed, and a connecting metal fitting 7 for connecting the end parts of the adjacent reinforcing ribs 23 and 33 is provided. The connecting metal fitting 7 is a substantially L-shaped flat plate, and has one end part bolted to the end part of one reinforcing rib 23 and the other end part bolted to the end part of the other reinforcing rib 33.SELECTED DRAWING: Figure 1

Description

本発明は、温度調整された空気などを流すダクトに関し、特に、空気の流れ方向と略直交する方向に延びる補強リブを有する補強リブ付きダクトに関する。 The present invention relates to a duct for flowing air whose temperature is adjusted, and more particularly to a duct with a reinforcing rib having a reinforcing rib extending in a direction substantially orthogonal to the flow direction of air.

ダクトは、建物の天井内などの構造物内に複数設置されて空気の流路を形成し、温度調整された空気などを流す。このようなダクトで断面が四角い角ダクトにおいては、大きさが所定以上の場合や所定の使用形態の場合には、空気の流れ方向と略直交する方向に延びる補強材を設ける必要がある。従来、補強材を設ける場合、山形鋼で構成された補強材をダクトの側壁表面にスポット溶接やリベットで取り付けていた。 A plurality of ducts are installed in a structure such as the ceiling of a building to form a flow path for air, and flow air whose temperature is adjusted. In such a duct having a square cross section, it is necessary to provide a reinforcing member extending in a direction substantially orthogonal to the air flow direction in the case of a size larger than a predetermined size or in a predetermined usage form. Conventionally, when a reinforcing material is provided, the reinforcing material made of angle steel is attached to the side wall surface of the duct by spot welding or rivets.

しかしながら、山形鋼で成る補強材をスポット溶接やリベットで取り付ける場合、材料費や労力、時間を要し、費用が嵩むばかりでなく、補強材が山形鋼であるためダクト全体の重量が重くなる、という問題があった。このため、補強材の取り付けを不要にすることができるダクトが知られている（例えば、非特許文献１参照。）。このダクトは、各側壁の中央部を２つ折りして外側に突出させ、流れ方向と略直交する方向に延びる補強リブが形成されている。そして、隣接する補強リブの端部同士が連結金具で覆われて連結されているものである。 However, when attaching a reinforcing member made of chevron steel by spot welding or rivets, not only material cost, labor and time are required, but also the cost increases, and since the reinforcing material is chevron steel, the weight of the entire duct becomes heavy, There was a problem. Therefore, there is known a duct that can eliminate the need to attach a reinforcing member (for example, see Non-Patent Document 1). This duct has a reinforcing rib formed by folding the central portion of each side wall in two and projecting it outward and extending in a direction substantially orthogonal to the flow direction. Then, the ends of the adjacent reinforcing ribs are covered with the connecting fittings and are connected to each other.

特開２００７−１４７２６９号公報JP, 2007-147269, A

ところで、特許文献１に記載のダクトでは、隣接する補強リブの端部同士を覆うように連結金具が複雑な形状に形成されているため、製作費が嵩むばかりでなく、取り扱いが煩雑であった。しかも、この連結金具をスポット溶接で壁板（側壁）に固定しなければならず、労力と時間、費用を要していた。 By the way, in the duct described in Patent Document 1, since the connecting fitting is formed in a complicated shape so as to cover the end portions of the adjacent reinforcing ribs, not only the manufacturing cost is increased, but also the handling is complicated. .. In addition, this connecting fitting must be fixed to the wall plate (side wall) by spot welding, which requires labor, time, and cost.

そこで本発明は、構成が簡易で容易に製作が可能な補強リブ付き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 duct with a reinforcing rib that has a simple structure and can be easily manufactured.

上記目的を達成するために請求項１に記載の発明は、４つの壁板が接合されて略四角い筒状に形成され、軸方向に空気が流れ、前記各壁板の中央部を２つ折りして外側に突出させ、軸方向と略直交する方向に延びる補強リブが形成され、隣接する前記補強リブの端部同士を連結する連結金具を備え、前記連結金具は、略Ｌ字状の平板で、一端部が一方の前記補強リブの端部にボルト締結され、他端部が他方の前記補強リブの端部にボルト締結される、ことを特徴とする補強リブ付きダクトである。 In order to achieve the above-mentioned object, the invention according to claim 1 is formed by joining four wall plates into a substantially rectangular tube shape, air flows in the axial direction, and the center part of each wall plate is folded in two. Reinforcing ribs extending outward in a direction substantially orthogonal to the axial direction are formed, and a connecting fitting for connecting the ends of the adjacent reinforcing ribs is provided. The connecting fitting is a substantially L-shaped flat plate. A duct with reinforcing ribs, wherein one end is bolted to an end of one of the reinforcing ribs and the other end is bolted to an end of the other reinforcing rib.

請求項２に記載の発明は、請求項１に記載の補強リブ付きダクトにおいて、前記連結金具の角部の外縁が円弧状に形成され、前記連結金具の両端部が前記ボルト締結された際に、前記連結金具の角部の外縁が前記補強リブの外縁よりも突出するように形成されている、ことを特徴とする。 According to a second aspect of the present invention, in the duct with reinforcing ribs according to the first aspect, when the outer edges of the corners of the connecting fitting are formed in an arc shape, and both ends of the connecting fitting are fastened by the bolts. The outer edge of the corner portion of the connecting fitting is formed to project more than the outer edge of the reinforcing rib.

請求項３に記載の発明は、４つの壁板が接合されて略四角い筒状に形成され、軸方向に空気が流れ、前記各壁板の中央部を２つ折りして外側に突出させ、軸方向と略直交する方向に延びる補強リブが形成され、隣接する前記補強リブの端部同士を連結する連結金具を備え、前記連結金具は、略Ｌ字状の平板で、一端部が一方の前記補強リブの間に挿入され、他端部が他方の前記補強リブの間に挿入される、ことを特徴とする補強リブ付きダクトである。 According to a third aspect of the present invention, four wall plates are joined together to form a substantially quadrangular tubular shape, air flows in the axial direction, the central portion of each wall plate is folded in two, and is projected outward, Reinforcing ribs extending in a direction substantially orthogonal to the direction are formed, and a connecting fitting for connecting the ends of the adjacent reinforcing ribs is provided, and the connecting fitting is a substantially L-shaped flat plate, and one end of the connecting fitting is one. A duct with reinforcing ribs, characterized in that it is inserted between the reinforcing ribs and the other end is inserted between the other reinforcing ribs.

請求項４に記載の発明は、請求項３に記載の補強リブ付きダクトにおいて、前記連結金具の角部の外縁が円弧状に形成され、前記連結金具の両端部が前記補強リブの間に挿入された際に、前記連結金具の角部の外縁が前記補強リブの外縁よりも突出するように形成されている、ことを特徴とする。 According to a fourth aspect of the invention, in the duct with reinforcing ribs according to the third aspect, the outer edges of the corners of the connecting fitting are formed in an arc shape, and both ends of the connecting fitting are inserted between the reinforcing ribs. The outer edge of the corner portion of the connecting metal piece is formed so as to project more than the outer edge of the reinforcing rib when the connecting metal is bent.

請求項１に記載の発明によれば、各壁板の中央部を２つ折りして補強リブが形成されているため、山形鋼から成る補強材をスポット溶接やリベットで取り付ける必要がない。また、連結金具の両端部を隣接する補強リブの端部にボルト締結するだけで、隣接する補強リブの端部同士を連結することができ、従来のように連結金具をスポット溶接する場合に比べて、労力と時間、費用を軽減することが可能となる。このように、構成が簡易で容易に製作することが可能となる。また、連結金具が略Ｌ字状の平板で単純な形状のため、取り扱いや保管、運搬などがしやすい。 According to the invention described in claim 1, since the reinforcing rib is formed by folding the central portion of each wall plate in two, it is not necessary to attach the reinforcing member made of angle steel by spot welding or rivets. In addition, the ends of the adjacent reinforcing ribs can be connected by simply bolting both ends of the connecting bracket to the ends of the adjacent reinforcing ribs. Therefore, it is possible to reduce labor, time and cost. In this way, the structure is simple and it can be easily manufactured. Further, since the connecting fitting is a substantially L-shaped flat plate and has a simple shape, it is easy to handle, store, and carry.

請求項２に記載の発明によれば、連結金具の両端部を補強リブの端部にボルト締結した状態、つまり、隣接する補強リブの端部同士を連結金具で連結した状態で、連結金具の角部の円弧状の外縁が補強リブの外縁よりも突出する。このため、補強リブの端部で手を傷つけたり外部に損傷を与えたりするのを、より確実に防止、抑制することが可能となる。 According to the invention described in claim 2, in the state where both ends of the connecting metal fitting are bolted to the ends of the reinforcing ribs, that is, the ends of the adjacent reinforcing ribs are connected with the connecting metal fitting, The arcuate outer edge of the corner portion projects more than the outer edge of the reinforcing rib. Therefore, it is possible to more reliably prevent and suppress the injury of the hand or the damage to the outside at the end of the reinforcing rib.

請求項３に記載の発明によれば、各壁板の中央部を２つ折りして補強リブが形成されているため、山形鋼から成る補強材をスポット溶接やリベットで取り付ける必要がない。また、連結金具の両端部を隣接する補強リブの間（隙間）に挿入するだけで、隣接する補強リブの端部同士を連結することができ、従来のように連結金具をスポット溶接する場合に比べて、労力と時間、費用を軽減することが可能となる。このように、構成が簡易で容易に製作することが可能となる。また、連結金具が略Ｌ字状の平板で単純な形状のため、取り扱いや保管、運搬などがしやすい。 According to the invention described in claim 3, since the reinforcing rib is formed by folding the central portion of each wall plate in two, it is not necessary to attach the reinforcing member made of angle steel by spot welding or rivets. In addition, the ends of adjacent reinforcing ribs can be connected by simply inserting both ends of the connecting bracket between adjacent reinforcing ribs (gap). In comparison, it is possible to reduce labor, time and cost. In this way, the structure is simple and it can be easily manufactured. Further, since the connecting fitting is a substantially L-shaped flat plate and has a simple shape, it is easy to handle, store, and carry.

請求項４に記載の発明によれば、連結金具の両端部を補強リブの間に挿入した状態、つまり、隣接する補強リブの端部同士を連結金具で連結した状態で、連結金具の角部の円弧状の外縁が補強リブの外縁よりも突出する。このため、連結金具の角部が補強リブの間に入って連結金具がずれてしまうのを防止、抑制することができ、隣接する補強リブの端部同士を適正に連結することが可能となる。さらに、補強リブの端部で手を傷つけたり外部に損傷を与えたりするのを、より確実に防止、抑制することが可能となる。 According to the invention as set forth in claim 4, in a state where both ends of the connecting metal fitting are inserted between the reinforcing ribs, that is, in a state where the ends of the adjacent reinforcing ribs are connected by the connecting metal fitting, the corner portion of the connecting metal fitting is connected. The arc-shaped outer edge of the projection protrudes more than the outer edge of the reinforcing rib. For this reason, it is possible to prevent or suppress the displacement of the connecting metal fitting due to the corner portion of the connecting metal fitting entering between the reinforcing ribs, and it becomes possible to properly connect the end portions of the adjacent reinforcing ribs. .. Further, it is possible to more reliably prevent and suppress the injury of the hand or the damage to the outside at the end portion of the reinforcing rib.

この発明の実施の形態１に係る補強リブ付きダクトを示す斜視図である。It is a perspective view which shows the duct with a reinforcement rib which concerns on Embodiment 1 of this invention. 図１の補強リブ付きダクトの第１の壁板を示す斜視図である。It is a perspective view which shows the 1st wall board of the duct with a reinforcement rib of FIG. 図２のＡ部拡大図である。It is an A section enlarged view of FIG. 図１の補強リブ付きダクトの第２の壁板を示す斜視図である。It is a perspective view which shows the 2nd wall plate of the duct with a reinforcement rib of FIG. 図４のＢ部拡大図（ａ）と、第１の壁板と第２の壁板のハゼ接合状態を示す断面図（ｂ）である。It is the B section enlarged view (a) of FIG. 4, and sectional drawing (b) which shows the goby joining state of a 1st wall board and a 2nd wall board. 図１の補強リブ付きダクトのコーナーピース周辺を示す拡大斜視図である。It is an expansion perspective view which shows the corner piece periphery of the duct with a reinforcement rib of FIG. 図１の補強リブ付きダクトの連結金具を示す正面図である。It is a front view which shows the connection metal fitting of the duct with a reinforcement rib of FIG. 図７の連結金具の取付状態を示す斜視図である。It is a perspective view which shows the attachment state of the connection metal fitting of FIG. この発明の実施の形態２に係る連結金具の取付状態を示す斜視図である。It is a perspective view which shows the attachment state of the connection metal fitting which concerns on Embodiment 2 of this invention. この発明の実施の形態３に係る連結金具の取付状態を示す斜視図である。It is a perspective view which shows the attachment state of the connection metal fitting which concerns on Embodiment 3 of this invention.

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 embodiments.

（実施の形態１）
図１は、この実施の形態に係る補強リブ付きダクト１を示す斜視図である。この補強リブ付きダクト１は、補強リブ２３、３３等を備えるダクトであり、４つの壁板２〜５が接合されて略四角い筒状に形成され、軸方向に空気が流れるようになっている。ここで、相対向する第１の壁板２と第３の壁板４とが同等な構成で、相対向する第２の壁板３と第４の壁板５とが同等な構成なため、主として、第１の壁板２と第２の壁板３について説明する。 (Embodiment 1)
FIG. 1 is a perspective view showing a duct 1 with a reinforcing rib according to this embodiment. The duct 1 with the reinforcing ribs is a duct including the reinforcing ribs 23, 33, etc., and is formed into a substantially square tubular shape by joining four wall plates 2 to 5 so that air flows in the axial direction. .. Here, since the first wall plate 2 and the third wall plate 4 facing each other have the same configuration, and the second wall plate 3 and the fourth wall plate 5 facing each other have the same configuration, The first wall plate 2 and the second wall plate 3 will be mainly described.

第１の壁板２は、図２に示すように、略長方形の板材で構成され、両短辺部が外側に略直角に折り曲げられてフランジ部２１が形成されている。また、両長辺部がハゼ折りされて接合部２２が形成されている。この接合部２２にはシングルはぜ２２ａが複数連続的に形成され、後述するダブルはぜ３２と合わせてボタンパンチスナップはぜを構成している。このシングルはぜ２２ａは、図３に示すように、接合部２２がコ字状に切断され、コ字状の切断部分が内側に折り曲げられて形成されている。 As shown in FIG. 2, the first wall plate 2 is made of a substantially rectangular plate material, and both short side portions are bent outward at a substantially right angle to form a flange portion 21. Further, both long side portions are goose-folded to form a joint portion 22. A plurality of single seams 22a are continuously formed in the joint portion 22, and a button punch snap seam is formed by combining with a double seam 32 described later. As shown in FIG. 3, the single groove 22a is formed by cutting the joint portion 22 into a U-shape and bending the U-shaped cut portion inward.

また、第１の壁板２の中央部には、２つに折り重ねられて外側に突出し、軸方向と略直交する方向（フランジ部２１と平行）に延びる補強リブ２３が形成されている。すなわち、図３に示すように、第１の壁板２の中央部が折り重ねられて長板状の補強リブ２３が形成されており、補強リブ２３は第１の壁板２と一体である。この補強リブ２３の位置と高さは、補強リブ付きダクト１が所定の強度、剛性が得られるように設定されている。また、補強リブ２３を形成できるように、接合部２２には、補強リブ２３の厚みの分だけ接合部２２が形成されない切欠き部２２ｂが設けられている。このような補強リブ２３の両端部つまり両接合部２２側には、第１のボルト挿入孔２３ａが形成されている。 In addition, a reinforcing rib 23 is formed at the center of the first wall plate 2 so as to be folded in two, project outward, and extend in a direction substantially parallel to the axial direction (parallel to the flange 21). That is, as shown in FIG. 3, the central portion of the first wall plate 2 is folded and overlaid to form a long plate-shaped reinforcing rib 23, and the reinforcing rib 23 is integral with the first wall plate 2. .. The position and height of the reinforcing rib 23 are set so that the duct 1 with the reinforcing rib can obtain a predetermined strength and rigidity. Further, in order to form the reinforcing rib 23, the joint portion 22 is provided with a notch portion 22b in which the joint portion 22 is not formed by the thickness of the reinforcing rib 23. A first bolt insertion hole 23a is formed on both end portions of the reinforcing rib 23, that is, on the joint portion 22 side.

第２の壁板３は、図４に示すように、略長方形の板材で構成され、両短辺部が外側に略直角に折り曲げられてフランジ部３１が形成されている。また、図５（ａ）に示すように、両長辺部がハゼ折りされてダブルはぜ３２が形成され、このダブルはぜ３２は、図５（ｂ）に示すように、第１の壁板２のシングルはぜ２２ａとかみ合う形状に形成されている。そして、第２の壁板３のダブルはぜ３２が第１の壁板２の接合部２２とはぜ接合されて、第１の壁板２と第２の壁板３とが組み付けられている。 As shown in FIG. 4, the second wall plate 3 is formed of a substantially rectangular plate material, and both short side portions are bent outward at a substantially right angle to form a flange portion 31. Further, as shown in FIG. 5( a ), both long side portions are goby-folded to form a double seam 32. The double seam 32 is formed on the first wall as shown in FIG. 5( b ). The single plate 2 is formed in a shape that engages with the sea 22a. The double wall 32 of the second wall plate 3 is bonded to the joint portion 22 of the first wall plate 2 to assemble the first wall plate 2 and the second wall plate 3 together. ..

また、第２の壁板３の中央部には、第１の壁板２と同様に、２つに折り重ねられて外側に突出し、軸方向と略直交する方向（フランジ部３１と平行）に延びる補強リブ３３が形成されている。この補強リブ３３の位置と高さは、補強リブ２３と同じに設定され、補強リブ付きダクト１の周方向に連続的に延びるように補強リブ２３、３３（壁板４、５の補強リブを含む）が形成されている。このような補強リブ３３の両端部つまり両ダブルはぜ３２側には、第２のボルト挿入孔３３ａが形成されている。 Further, in the central portion of the second wall plate 3, like the first wall plate 2, it is folded in two and protrudes outward, and in the direction substantially orthogonal to the axial direction (parallel to the flange portion 31). Reinforcing reinforcing ribs 33 are formed. The position and height of the reinforcing ribs 33 are set to be the same as those of the reinforcing ribs 23, and the reinforcing ribs 23 and 33 (the reinforcing ribs of the wall plates 4 and 5 are arranged so as to continuously extend in the circumferential direction of the duct 1 with the reinforcing ribs). (Including) are formed. A second bolt insertion hole 33a is formed on both ends of the reinforcing rib 33, that is, on both sides of the double seam 32.

このような壁板２〜５が組み付けられて四角い筒体が形成され、例えば、図６に示すように、第１の壁板２のフランジ部２１と第２の壁板３のフランジ部３１とにＬ字状のコーナーピース６が取り付けられる。同様に、他のフランジ間にもコーナーピース６が取り付けられる。そして、コーナーピース６の角部に形成された孔６ａにボルトを挿入することで、他のダクトなどと連結されるようになっている。 Such wall plates 2 to 5 are assembled to form a rectangular tubular body. For example, as shown in FIG. 6, a flange portion 21 of the first wall plate 2 and a flange portion 31 of the second wall plate 3 are formed. An L-shaped corner piece 6 is attached to. Similarly, the corner piece 6 is attached between the other flanges. Then, by inserting a bolt into a hole 6a formed in a corner portion of the corner piece 6, it is connected to another duct or the like.

また、隣接する補強リブ２３、３３の端部同士を連結する連結金具７を備える。この連結金具７は、図７に示すように、略Ｌ字状の平板で、略長方形状の２つの直板部７１が略直角にアングル状に配置され、それぞれの自由端部側には連結用孔７１ａが形成されている。また、２つの直板部７１の自由端部の外側の角部が斜めにカットされて、傾斜部７１ｂが形成されている。さらに、連結金具７の角部（２つの直板部７１の交差部）の外縁７ａが円弧状に形成され、２つの直板部７１の外縁７１ｃよりも角部の外縁７ａが外側に突出するように形成されている。 Further, a connecting fitting 7 is provided for connecting the ends of the adjacent reinforcing ribs 23 and 33. As shown in FIG. 7, the connecting fitting 7 is a substantially L-shaped flat plate, and two substantially rectangular straight plate portions 71 are arranged in an angle at a substantially right angle. The hole 71a is formed. Further, the outer corners of the free ends of the two straight plate portions 71 are obliquely cut to form inclined portions 71b. Further, the outer edge 7a of the corner portion (intersection portion of the two straight plate portions 71) of the connecting metal fitting 7 is formed in an arc shape so that the outer edge 7a of the corner portion is projected more outward than the outer edge 71c of the two straight plate portions 71. Has been formed.

そして、図８に示すように、連結金具７の一方の直板部７１の連結用孔７１ａと補強リブ２３の第１のボルト挿入孔２３ａとにボルト８１を挿入し、ボルト８１にナット８２を締め付けることで、連結金具７の一端部が一方の補強リブ２３の端部にボルト締結される。同様に、連結金具７の他方の直板部７１の連結用孔７１ａと補強リブ３３の第２のボルト挿入孔３３ａとにボルト８１を挿入し、ボルト８１にナット８２を締め付けることで、連結金具７の他端部が他方の補強リブ３３の端部にボルト締結される。 Then, as shown in FIG. 8, a bolt 81 is inserted into the connecting hole 71 a of the one straight plate portion 71 of the connecting fitting 7 and the first bolt insertion hole 23 a of the reinforcing rib 23, and the nut 82 is fastened to the bolt 81. As a result, one end of the connecting fitting 7 is bolted to the end of the one reinforcing rib 23. Similarly, by inserting the bolt 81 into the connecting hole 71a of the other straight plate portion 71 of the connecting fitting 7 and the second bolt insertion hole 33a of the reinforcing rib 33, and tightening the nut 82 on the bolt 81, the connecting fitting 7 The other end of the above is bolted to the end of the other reinforcing rib 33.

このようにして、隣接する補強リブ２３、３３の端部同士が連結金具７で連結されている。そして、すべての隣接する補強リブ２３、３３（壁板４、５の補強リブを含む）の端部同士が、同様にして連結金具７で連結されている。 In this way, the end portions of the adjacent reinforcing ribs 23 and 33 are connected by the connecting fitting 7. The ends of all the adjacent reinforcing ribs 23 and 33 (including the reinforcing ribs of the wall plates 4 and 5) are similarly connected by the connecting fitting 7.

また、このような連結状態において、図８に示すように、連結金具７の角部の円弧状の外縁７ａが、補強リブ２３、３３の外縁（折り目部）よりも外側に突出するように、連結金具７が形成されている。なお、図１、図８においては、図を見やすくするために、傾斜部７１ｂを図示省略している。後述する図９、図１０においても、同様に傾斜部７１ｂを図示省略している。 Further, in such a connected state, as shown in FIG. 8, the arc-shaped outer edges 7a of the corners of the connecting metal fitting 7 are projected outside the outer edges (folded portions) of the reinforcing ribs 23 and 33. A connecting fitting 7 is formed. In addition, in FIG. 1 and FIG. 8, the inclined portion 71b is omitted in order to make the drawings easy to see. Similarly, in FIGS. 9 and 10 described later, the inclined portion 71b is not shown.

以上のような構成の補強リブ付きダクト１によれば、各壁板２〜５の中央部を２つ折りして補強リブ２３、３３等が形成されているため、山形鋼から成る補強材をスポット溶接やリベットで取り付ける必要がない。また、連結金具７の両端部（直板部７１）を隣接する補強リブ２３、３３等の端部にボルト締結するだけで、隣接する補強リブ２３、３３等の端部同士を連結することができ、従来のように連結金具をスポット溶接する場合に比べて、労力と時間、費用を軽減することが可能となる。このように、構成が簡易で容易に製作することが可能となる。また、連結金具７が略Ｌ字状の平板で単純な形状のため、取り扱いや保管、運搬などがしやすい。 According to the duct 1 with reinforcing ribs configured as described above, since the reinforcing ribs 23, 33 and the like are formed by folding the central portions of the wall plates 2 to 5 in two, the reinforcing material made of angle steel is spotted. No need to attach by welding or rivets. Further, the ends of the adjacent reinforcing ribs 23, 33, etc. can be connected by simply bolting both ends (straight plate portion 71) of the connecting fitting 7 to the ends of the adjacent reinforcing ribs 23, 33, etc. The labor, time, and cost can be reduced as compared with the conventional case where the connecting fitting is spot-welded. In this way, the structure is simple and it can be easily manufactured. Further, since the connecting fitting 7 is a substantially L-shaped flat plate and has a simple shape, it is easy to handle, store, and carry.

しかも、連結金具７の両端部を補強リブ２３、３３等の端部にボルト締結した状態、つまり、隣接する補強リブ２３、３３等の端部同士を連結金具７で連結した状態で、連結金具７の角部の円弧状の外縁７ａが補強リブ２３、３３等の外縁よりも突出する。このため、補強リブ２３、３３等の端部・角部で手を傷つけたり外部に損傷を与えたりするのを、より確実に防止、抑制することが可能となる。 Moreover, in the state where both ends of the connecting metal fitting 7 are bolted to the ends of the reinforcing ribs 23, 33, that is, the end portions of the adjacent reinforcing ribs 23, 33 are connected by the connecting metal fitting 7, The arc-shaped outer edge 7a of the corner portion of 7 projects more than the outer edges of the reinforcing ribs 23, 33 and the like. For this reason, it is possible to more reliably prevent and suppress damage to the hands and external damage at the ends and corners of the reinforcing ribs 23, 33 and the like.

（実施の形態２）
図９は、この実施の形態に係る連結金具７の取付状態を示す斜視図である。この実施の形態では、連結金具７の一端部が一方の補強リブ２３の間に挿入されてボルト締結され、他端部が他方の補強リブ３３の間に挿入されてボルト締結される点で、実施の形態１と構成が異なり、実施の形態１と同等の構成については、同一符号を付することでその説明を省略する。 (Embodiment 2)
FIG. 9 is a perspective view showing a mounting state of the connecting fitting 7 according to this embodiment. In this embodiment, one end of the connecting fitting 7 is inserted between one of the reinforcing ribs 23 and bolted, and the other end is inserted between the other reinforcing ribs 33 and bolted. The configuration different from that of the first embodiment and the same configuration as that of the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

すなわち、連結金具７の一方の直板部７１が第１の壁板２の補強リブ２３の間に挿入され（補強リブ２３で挟まれ）、この直板部７１の連結用孔７１ａと補強リブ２３の第１のボルト挿入孔２３ａとにボルト８１を挿入し、ボルト８１にナット８２を締め付けることで、連結金具７の一端部が一方の補強リブ２３の端部に固定される。同様に、連結金具７の他方の直板部７１が第２の壁板３の補強リブ３３の間に挿入され（補強リブ３３で挟まれ）、この直板部７１の連結用孔７１ａと補強リブ３３の第２のボルト挿入孔３３ａとにボルト８１を挿入し、ボルト８１にナット８２を締め付けることで、連結金具７の他端部が他方の補強リブ３３の端部に固定される。 That is, one straight plate portion 71 of the connecting fitting 7 is inserted between the reinforcing ribs 23 of the first wall plate 2 (sandwiched between the reinforcing ribs 23 ), and the connecting holes 71 a of the straight plate portion 71 and the reinforcing ribs 23 are formed. By inserting the bolt 81 into the first bolt insertion hole 23 a and tightening the nut 82 on the bolt 81, one end of the connecting fitting 7 is fixed to the end of the one reinforcing rib 23. Similarly, the other straight plate portion 71 of the connecting fitting 7 is inserted between the reinforcing ribs 33 of the second wall plate 3 (sandwiched between the reinforcing ribs 33 ), and the connecting hole 71 a of this straight plate portion 71 and the reinforcing rib 33. By inserting the bolt 81 into the second bolt insertion hole 33a and tightening the nut 82 on the bolt 81, the other end of the coupling fitting 7 is fixed to the end of the other reinforcing rib 33.

このようにして、隣接する補強リブ２３、３３の端部同士が連結金具７で連結されている。そして、すべての隣接する補強リブ２３、３３（壁板４、５の補強リブを含む）の端部同士が、同様にして連結金具７で連結されている。 In this way, the end portions of the adjacent reinforcing ribs 23 and 33 are connected by the connecting fitting 7. The ends of all the adjacent reinforcing ribs 23 and 33 (including the reinforcing ribs of the wall plates 4 and 5) are similarly connected by the connecting fitting 7.

また、このような状態において、連結金具７の角部の円弧状の外縁７ａが、補強リブ２３、３３の外縁（折り目部）よりも外側に突出するように、連結金具７が形成されている。すなわち、隣接する補強リブ２３、３３の端部間に連結金具７の角部が配置され、この角部の円弧状の外縁７ａが、補強リブ２３、３３の外縁よりも外側に突出する。 Further, in such a state, the connecting metal fitting 7 is formed so that the arcuate outer edge 7a of the corner portion of the connecting metal fitting 7 projects outside the outer edges (folded portions) of the reinforcing ribs 23 and 33. .. That is, the corner portion of the connecting metal fitting 7 is arranged between the end portions of the adjacent reinforcing ribs 23 and 33, and the arc-shaped outer edge 7 a of this corner portion projects outside the outer edges of the reinforcing ribs 23 and 33.

このような実施の形態によれば、実施の形態１と同様に、各壁板２〜５の中央部を２つ折りして補強リブ２３、３３等が形成されているため、山形鋼から成る補強材をスポット溶接やリベットで取り付ける必要がない。また、連結金具７の両端部（直板部７１）を隣接する補強リブ２３、３３等の間（隙間）に挿入してボルト締結するだけで、隣接する補強リブ２３、３３等の端部同士を連結することができ、従来のように連結金具をスポット溶接する場合に比べて、労力と時間、費用を軽減することが可能となる。このように、構成が簡易で容易に製作することが可能となる。 According to such an embodiment, as in the first embodiment, the reinforcing ribs 23, 33, etc. are formed by folding the central portion of each of the wall plates 2-5 in two, so that the reinforcement made of angle steel is used. No need to spot weld or rivet the material. In addition, by inserting both ends (straight plate portion 71) of the connecting metal fitting 7 into the spaces (gap) between the adjacent reinforcing ribs 23, 33 and tightening the bolts, the ends of the adjacent reinforcing ribs 23, 33, etc. can be connected to each other. They can be connected, and labor, time, and cost can be reduced as compared with the conventional case where spot welding is performed on the connecting fitting. In this way, the structure is simple and it can be easily manufactured.

しかも、連結金具７の２つの直板部７１の自由端部に傾斜部７１ｂが形成されているため、直板部７１を補強リブ２３、３３等の間に容易に挿入することが可能となる。また、２つの直板部７１を補強リブ２３、３３等で挟んでさらにボルト締結するため、隣接する補強リブ２３、３３等の端部同士を連結金具７でより強固に連結することが可能となる。この結果、補強材としての補強リブ２３、３３等および連結金具７の強度、剛性を高めることが可能となる。 Moreover, since the inclined portions 71b are formed at the free ends of the two straight plate portions 71 of the connecting fitting 7, the straight plate portion 71 can be easily inserted between the reinforcing ribs 23, 33 and the like. Further, since the two straight plate portions 71 are sandwiched by the reinforcing ribs 23, 33 and the like and further bolted, the end portions of the adjacent reinforcing ribs 23, 33, etc. can be connected more firmly by the connecting fitting 7. .. As a result, it is possible to increase the strength and rigidity of the reinforcing ribs 23, 33 and the like as the reinforcing material and the connecting fitting 7.

また、連結金具７の直板部７１を補強リブ２３、３３等の間に挿入した状態、つまり、隣接する補強リブ２３、３３等の端部同士を連結金具７で連結した状態で、連結金具７の角部の円弧状の外縁７ａが補強リブ２３、３３等の外縁よりも突出する。このため、ボルト締結する前において、連結金具７の角部が補強リブ２３、３３等の間に入って連結金具７がずれてしまうのを防止、抑制することができ、隣接する補強リブ２３、３３等の端部同士を適正に連結することが可能となる。さらに、補強リブ２３、３３等の端部・角部で手を傷つけたり外部に損傷を与えたりするのを、より確実に防止、抑制することが可能となる。 In addition, in the state where the straight plate portion 71 of the connecting metal fitting 7 is inserted between the reinforcing ribs 23, 33, that is, in the state where the end portions of the adjacent reinforcing ribs 23, 33 are connected by the connecting metal fitting 7, the connecting metal fitting 7 The arc-shaped outer edge 7a of the corner portion of the projection protrudes more than the outer edges of the reinforcing ribs 23, 33 and the like. Therefore, it is possible to prevent or suppress the displacement of the connecting metal fitting 7 due to the corner portion of the connecting metal fitting 7 entering between the reinforcing ribs 23, 33, etc. before the bolt is fastened, and the adjacent reinforcing ribs 23, It is possible to properly connect the end portions such as 33. Further, it is possible to more reliably prevent and suppress the damage to the outside or the hand of the reinforcing ribs 23 and 33 at the ends and corners.

（実施の形態３）
図１０は、この実施の形態に係る連結金具７の取付状態を示す斜視図である。この実施の形態では、連結金具７の一端部が一方の補強リブ２３の間に挿入され、他端部が他方の補強リブ３３の間に挿入される点で、実施の形態２と構成が異なり、実施の形態２と同等の構成については、同一符号を付することでその説明を省略する。 (Embodiment 3)
FIG. 10 is a perspective view showing a mounting state of the connecting fitting 7 according to this embodiment. This embodiment differs from the second embodiment in that one end of the connecting fitting 7 is inserted between the reinforcing ribs 23 on one side and the other end is inserted between the reinforcing ribs 33 on the other side. The same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

すなわち、連結金具７の一方の直板部７１が第１の壁板２の補強リブ２３の間に挿入されて、補強リブ２３で直板部７１が挟持されることで、連結金具７の一端部が一方の補強リブ２３の端部に固定される。同様に、連結金具７の他方の直板部７１が第２の壁板３の補強リブ３３の間に挿入されて、補強リブ３３で直板部７１が挟持されることで、連結金具７の他端部が他方の補強リブ３３の端部に固定される。 That is, one straight plate portion 71 of the connecting fitting 7 is inserted between the reinforcing ribs 23 of the first wall plate 2, and the straight plate portion 71 is sandwiched by the reinforcing ribs 23, so that one end of the connecting fitting 7 is It is fixed to the end of one reinforcing rib 23. Similarly, the other straight plate portion 71 of the connecting fitting 7 is inserted between the reinforcing ribs 33 of the second wall plate 3 and the straight plate portion 71 is sandwiched by the reinforcing ribs 33, so that the other end of the connecting fitting 7 is The part is fixed to the end of the other reinforcing rib 33.

このような実施の形態によれば、連結金具７の両直板部７１を補強リブ２３、３３等で挟持するだけで、隣接する補強リブ２３、３３等の端部同士を連結することができ、ボルト締結する必要がないため、実施の形態１、２に比べてより構成が簡易でより容易に製作することが可能となる。しかも、連結金具７に連結用孔７１ａを設けたり補強リブ２３、３３等にボルト挿入孔２３ａ、３３ａ等を設けたりする必要がなく、より構成が簡易でより容易に製作することが可能となる。 According to such an embodiment, the ends of the adjacent reinforcing ribs 23, 33, etc. can be connected by simply sandwiching both the straight plate portions 71 of the connecting fitting 7 with the reinforcing ribs 23, 33, etc. Since it is not necessary to fasten with bolts, the structure is simpler and manufacturing can be performed more easily than in the first and second embodiments. In addition, it is not necessary to provide the connecting hole 71a in the connecting fitting 7 or the bolt inserting holes 23a, 33a in the reinforcing ribs 23, 33, etc., and the structure is simpler and the manufacturing can be facilitated. ..

以上、この発明の実施の形態１〜３を詳述してきたが、具体的な構成は各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、実施の形態１〜３では、ボタンパンチスナップはぜで壁板２〜５を組み付けているが、その他のはぜや結合方法（溶接等）で組み付けてもよく、壁板２〜５が折り重なったり展開したりする結合方法（スピンはぜ）であってもよい。 Although the first to third embodiments of the present invention have been described in detail above, the specific configuration is not limited to the respective embodiments, and there are design changes and the like within the scope not departing from the gist of the present invention. Also included in the present invention. For example, in the first to third embodiments, the wall plates 2 to 5 are assembled by the button punch snap fit, but the wall plates 2 to 5 may be assembled by other fits or a joining method (welding or the like). It may be a binding method of folding or unfolding (spin seam).

１ 補強リブ付きダクト
２〜５ 壁板
２１ フランジ部
２２ 接合部
２２ａ シングルはぜ
２３ 補強リブ
２３ａ 第１のボルト挿入孔
３１ フランジ部
３２ ダブルはぜ
３３ 補強リブ
３３ａ 第２のボルト挿入孔
７ 連結金具
７ａ 角部の外縁
７１ 直板部
７１ａ 連結用孔
７１ｂ 傾斜部
７１ｃ 外縁
８１ ボルト
８２ ナット
1 Duct with reinforcing ribs 2 to 5 Wall plate 21 Flange portion 22 Joining portion 22a Single groove 23 Reinforcing rib 23a First bolt insertion hole 31 Flange portion 32 Double groove 33 Reinforcing rib 33a Second bolt insertion hole 7 Connecting metal fitting 7a Corner outer edge 71 Straight plate portion 71a Connection hole 71b Inclined portion 71c Outer edge 81 Bolt 82 Nut

Claims (4)

４つの壁板が接合されて略四角い筒状に形成され、軸方向に空気が流れ、
前記各壁板の中央部を２つ折りして外側に突出させ、軸方向と略直交する方向に延びる補強リブが形成され、
隣接する前記補強リブの端部同士を連結する連結金具を備え、
前記連結金具は、略Ｌ字状の平板で、一端部が一方の前記補強リブの端部にボルト締結され、他端部が他方の前記補強リブの端部にボルト締結される、
ことを特徴とする補強リブ付きダクト。 Four wall plates are joined together to form a substantially square cylinder, and air flows in the axial direction,
A reinforcing rib extending in a direction substantially orthogonal to the axial direction is formed by folding the central portion of each wall plate in two and projecting it outward.
A connecting fitting for connecting the ends of the adjacent reinforcing ribs is provided,
The connecting fitting is a substantially L-shaped flat plate, one end of which is bolted to an end of one of the reinforcing ribs and the other end of which is bolted to an end of the other reinforcing rib.
A duct with a reinforcing rib that is characterized. 前記連結金具の角部の外縁が円弧状に形成され、前記連結金具の両端部が前記ボルト締結された際に、前記連結金具の角部の外縁が前記補強リブの外縁よりも突出するように形成されている、
ことを特徴とする請求項１に記載のダクト。 An outer edge of a corner portion of the connecting metal fitting is formed in an arc shape, and when both ends of the connecting metal fitting are fastened by the bolts, an outer edge of a corner portion of the connecting metal fitting is projected more than an outer edge of the reinforcing rib. Is formed,
The duct according to claim 1, wherein: ４つの壁板が接合されて略四角い筒状に形成され、軸方向に空気が流れ、
前記各壁板の中央部を２つ折りして外側に突出させ、軸方向と略直交する方向に延びる補強リブが形成され、
隣接する前記補強リブの端部同士を連結する連結金具を備え、
前記連結金具は、略Ｌ字状の平板で、一端部が一方の前記補強リブの間に挿入され、他端部が他方の前記補強リブの間に挿入される、
ことを特徴とする補強リブ付きダクト。 Four wall plates are joined together to form a substantially square cylinder, and air flows in the axial direction,
A reinforcing rib extending in a direction substantially orthogonal to the axial direction is formed by folding the central portion of each wall plate in two and projecting it outward.
A connecting fitting for connecting the ends of the adjacent reinforcing ribs is provided,
The connecting fitting is a substantially L-shaped flat plate, one end of which is inserted between the one reinforcing rib and the other end of which is inserted between the other reinforcing ribs.
A duct with a reinforcing rib that is characterized. 前記連結金具の角部の外縁が円弧状に形成され、前記連結金具の両端部が前記補強リブの間に挿入された際に、前記連結金具の角部の外縁が前記補強リブの外縁よりも突出するように形成されている、
ことを特徴とする請求項３に記載のダクト。
Outer edges of the corners of the connecting fitting are formed in an arc shape, and when both ends of the connecting fitting are inserted between the reinforcing ribs, the outer edges of the corners of the connecting fitting are more than the outer edges of the reinforcing ribs. Is formed to project,
The duct according to claim 3, wherein:
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JPS5042560U (en) * 1973-08-13 1975-04-30
JPS5067642U (en) * 1973-10-19 1975-06-17
JPS5833042A (en) * 1981-05-11 1983-02-26 メツツ・テクニツク・ア−ゲ− Connecting mechanism of flange for rectangular air-conditioning duct
JPH0532941U (en) * 1991-04-26 1993-04-30 三重ダクト工業株式会社 Duct corner fittings
JPH07293959A (en) * 1994-04-25 1995-11-10 Fuji Kogyo Kk Reinforcing structure of corner for range hood fan
JP2007147269A (en) * 2005-11-04 2007-06-14 Fuji Kucho Kogyo Kk Duct and its manufacturing method

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JPS501567Y1 (en) * 1970-12-29 1975-01-17
NZ230202A (en) * 1988-08-04 1993-01-27 Bullock Mfg Pty Ltd L shaped corner bracket
JPH0622886U (en) * 1992-06-08 1994-03-25 サンデン株式会社 Door corner protection structure
JP3410062B2 (en) * 2000-05-02 2003-05-26 雄三 大塚 Filter device and filter cover mounting unit for range hood
US7195290B2 (en) * 2003-11-13 2007-03-27 William Christopher Duffy Apparatus for a fire-rated duct

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4733593Y1 (en) * 1970-10-12 1972-10-11
JPS5042560U (en) * 1973-08-13 1975-04-30
JPS5067642U (en) * 1973-10-19 1975-06-17
JPS5833042A (en) * 1981-05-11 1983-02-26 メツツ・テクニツク・ア−ゲ− Connecting mechanism of flange for rectangular air-conditioning duct
JPH0532941U (en) * 1991-04-26 1993-04-30 三重ダクト工業株式会社 Duct corner fittings
JPH07293959A (en) * 1994-04-25 1995-11-10 Fuji Kogyo Kk Reinforcing structure of corner for range hood fan
JP2007147269A (en) * 2005-11-04 2007-06-14 Fuji Kucho Kogyo Kk Duct and its manufacturing method

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