JP5757395B2

JP5757395B2 - Heat insulation material mounting tool to duct and method of attaching heat insulation material to duct using the same

Info

Publication number: JP5757395B2
Application number: JP2011040543A
Authority: JP
Inventors: 慎一郎深川; 昌吾大隣
Original assignee: Sanki Engineering Co Ltd
Current assignee: Sanki Engineering Co Ltd
Priority date: 2011-02-25
Filing date: 2011-02-25
Publication date: 2015-07-29
Anticipated expiration: 2031-02-25
Also published as: JP2012177425A

Description

ダクトの外周に装着される保温材の厚みが１５０ｍｍ以上必要とされる高温または超低温の気体を流すダクトにおいて、前記保温材を安全確実に取り付け、支持するためのダクトへの保温材取付用具及びそれを用いるダクトへの保温材の取付方法に関する。 In a duct for flowing a high-temperature or ultra-low-temperature gas that requires a thickness of 150 mm or more to be installed on the outer periphery of the duct, the heat-insulating material attaching tool to the duct for securely attaching and supporting the heat-insulating material, and the same The present invention relates to a method for attaching a heat insulating material to a duct using a hood.

角形ダクトの外周にロックウールやグラスウールの保温板を取付ける一般的な工法として、たとえば、建築設備施工マニュアル（空調篇）第２版〔日本建築設備士協会発行〕のＰ２９０〜２９４に保温板取付鋲を使用する場合の取付方法が記載されている。
これによれば、角ダクトに保温板を取り付ける場合には、その準備として、保温板を取り付けるための鋲を、ダクト側面、下面、及び上面に相互に等間隔となるよう、かつ千鳥に植付ける。この鋲の植付けには、接着剤による接着、はんだ付け、あるいは電気溶接などの方法が採用されている。
そして保温材は、前記準備段階でダクトに植え付けられた鋲が保温板を直角に貫くようにしてダクト表面に装着され、貫通した前記鋲の頭部にワッシャーを介入させて直角に折り曲げて固定する。
またその後、必要に応じてメタルラスを巻き付ける等配置場所の状況に合わせて外装を施すとしている。 As a general method of attaching a rock wool or glass wool heat insulation plate to the outer periphery of a rectangular duct, for example, a heat insulation plate attachment rod is attached to P290 to 294 of the second edition of the Building Equipment Construction Manual (Air Conditioning Edition) [published by Japan Association of Building Equipment Engineers] The mounting method when using is described.
According to this, when attaching a heat insulation board to a square duct, as preparations, plant the ridges for attaching the heat insulation board to the duct side surface, the lower surface, and the upper surface so that they are equally spaced from each other. . For planting the cocoons, methods such as bonding with an adhesive, soldering, or electric welding are employed.
The heat insulating material is attached to the surface of the duct so that the cocoon planted in the duct in the preparation stage penetrates the heat insulating plate at a right angle, and a washer is inserted into the head of the cocoon that penetrates and fixed at a right angle. .
After that, the exterior is applied according to the situation of the arrangement place such as winding a metal lath as required.

空調等一般的な角形ダクトの保温においては、上記工法による保温板の取り付けが行われているが、たとえば、高温の気体や超低温の気体を流すダクト等その用途によっては、取り付けなければならない保温材の厚さが１５０ｍｍを超える場合がある。
このような場合、通常１５０ｍｍを超える長さの鋲がないことや、あっても細い鋲では保温材の荷重に耐えられず、またダクトと鋲の溶接部分が経年劣化することから、前記鋲に換えて、全ねじボルト又はスタッドボルトが、ダクトの側面と下面の保温材を保持するために用いられる。
前記全ねじボルト又はスタッドボルトを保温材の保持に用いる場合には、予め工場でダクト側面、及び下面に前記全ねじボルト又はスタッドボルトを螺着するためのナットが溶接されて現場に持ち込まれる。ダクトが高温の気体用の場合など、接着剤による接着では経時的な接着剤の劣化により前記ナットが脱落するおそれがあり、それを防ぐためにナットを溶着することになる。 In the insulation of general rectangular ducts such as air conditioning, the insulation board is attached by the above method. For example, the insulation material that needs to be attached depending on the application, such as a duct through which high-temperature gas or ultra-low temperature gas flows. The thickness may exceed 150 mm.
In such a case, since there is usually no wrinkle with a length exceeding 150 mm, even if there is a thin flaw, it cannot withstand the load of the heat insulating material, and the welded portion between the duct and the flaw deteriorates over time. Instead, full thread bolts or stud bolts are used to hold the insulation on the side and bottom surfaces of the duct.
When the full screw bolt or the stud bolt is used for holding the heat insulating material, nuts for screwing the full screw bolt or the stud bolt to the duct side surface and the lower surface are welded in advance at the factory. In the case of bonding with an adhesive, such as when the duct is for a high-temperature gas, the nut may fall off due to deterioration of the adhesive over time, and the nut is welded to prevent this.

しかし、上記の方法においては、ナットを溶接する熱によって前記ダクトが壁の内側まで溶融して穴があかないよう板厚のダクトを使用しなければならない。そのため、軽量化が困難で架設経費も嵩むという問題が内在している。
また、工場から現場に納品されたダクトへのナット溶接数に不足があった場合や、現場においてダクトへのナット溶接数に追加が必要となった場合には、現場でナットの溶接を行うことになるが、溶接によってダクト内面に黒皮が生じる。黒皮とは、鉄鋼が５７５℃以上に加熱されたときに生じる黒く堅い酸化鉄の皮膜であり、ダクト内で不均一に発生し除去が必要となる。このため該当個所のダクトを黒皮除去のための酸洗浄が可能な工場へ返送することとなり、工期遅れの原因ともなっていた。特に、小口径ダクトでは内部の視認が困難であるため、酸洗浄後のダクト内面に黒皮が残存しているか否かの確認が難しく、ダクトの品質保証上の問題となる。
なお、上記の問題は現場でダクトにナットを溶接する場合のみならず、ダクトに全ねじボルトやスタッドボルトを直接溶接する場合においても同様に起こる。 However, in the above-described method, a duct having a plate thickness must be used so that the heat of welding the nut melts the duct to the inside of the wall and does not have a hole. Therefore, the problem that weight reduction is difficult and the construction cost increases is inherent.
In addition, if there is a shortage of nut welding to the duct delivered from the factory to the site, or if it is necessary to add to the number of nut welding to the duct at the site, the nut should be welded on site. However, black skin occurs on the inner surface of the duct by welding. Black skin is a film of black and hard iron oxide that is produced when steel is heated to 575 ° C. or higher, and it is unevenly generated in the duct and needs to be removed. For this reason, the duct at the corresponding location was returned to a factory capable of acid cleaning to remove the black skin, causing a delay in the construction period. In particular, since it is difficult to visually check the inside of a small-diameter duct, it is difficult to confirm whether or not black skin remains on the inner surface of the duct after acid cleaning, which is a problem in quality assurance of the duct.
The above problem occurs not only when a nut is welded to a duct in the field, but also when a full screw bolt or a stud bolt is directly welded to the duct.

建築設備施工マニュアル（空調篇）第２版、日本建築設備士協会発行、ｐ２９０〜２９４Building equipment construction manual (air conditioning) 2nd edition, published by Japan Association of Building Equipment Engineers, p290-294

本発明は、上記周辺技術の現状に鑑みてなされたものであって、ダクトへのナットの溶接を避けることによって、ダクトの軽量化と、現場での溶接による黒皮の発生を皆無として工程遅れの原因の一つをなくし、かつ、保温材を安全確実に取り付け、支持できるダクトへの保温材取付用具及びそれを用いたダクトへの保温材取付方法を提供するものである。 The present invention has been made in view of the current state of the peripheral technology described above, and avoids welding of nuts to the duct, thereby reducing the weight of the duct and eliminating the occurrence of black skin due to on-site welding. It is an object of the present invention to provide a heat insulating material attaching tool to a duct that can eliminate and remove one of the causes, and to securely attach and support the heat insulating material, and a method of attaching the heat insulating material to the duct using the same.

本発明者らは上記課題を下記の手段により解決した。
（１）角型ダクトに、前記保温材を安全、確実に取り付け、支持するために前記角形ダクトの外周に装着して使用される保温材取付用具であり、
前記角形ダクトの上面と一方の側面に沿わせて配設される表面に保温材保持具が取り付けられる上部金具と、前記角形ダクトの下面ともう一方の側面に沿わせて配設される表面に保温材保持具が取り付けられる下部金具とからなり、前記上部金具と前記下部金具が、前記角形ダクトを囲んで固定されるための固定部を備えてなり、前記上部金具（１１）と下部金具（１２）の固定部（１１ａ、１２ｂ）、（１１ｂ、１２ａ）とが、当接してタッピングビス（１４）で結合可能に構成されてなることを特徴とするダクトへの保温材取付用具。 The present inventors have solved the above problems by the following means.
(1) A heat insulating material mounting tool that is used by being attached to the outer periphery of the rectangular duct in order to safely and reliably attach and support the heat insulating material to the square duct,
An upper metal fitting to which a heat insulating material holder is attached to a surface disposed along the upper surface and one side surface of the rectangular duct, and a surface disposed along the lower surface and the other side surface of the rectangular duct. consists of a lower metal fitting heat insulating material holder is mounted, the upper fitting and the lower fitting, the Ri Na comprise a stationary part to be fixed to surround the rectangular duct, said upper bracket (11) and a lower bracket fixing portion (12) (11a, 12b), (11b, 12a) with, but thermal insulation fitting to duct Rukoto wherein a is configured to be coupled in contact with the tapping screw (14).

（２）前記角形ダクトが、その外周に１５０ｍｍ以上の厚みを有する保温材の装着が必要となる高温又は超低温の気体を流すものであって、前記１５０ｍｍ以上の厚みを有する保温材を前記角形ダクトに安全、確実に取り付け，支持するのに使用されるものであることを特徴とする前項（１）に記載のダクトへの保温材取付用具。 (2) The rectangular duct is configured to flow a high-temperature or ultra-low-temperature gas that requires the installation of a heat insulating material having a thickness of 150 mm or more on the outer periphery thereof, and the heat insulating material having a thickness of 150 mm or more is used as the rectangular duct. The heat insulating material attaching tool to the duct as described in the above item (1), which is used for safely and reliably attaching and supporting the duct.

（３）外周に装着される保温材の厚みが１５０ｍｍ以上必要となる高温又は超低温の気体を流す角型ダクトに、前記保温材を安全、確実に取り付け、支持するために前記角形ダクトの外周に装着して使用される保温材用具であり、
前記角形ダクトの上面と一方の側面に沿わせて配設される表面に保温材保持具が取り付けられる上部金具と、前記角形ダクトの下面ともう一方の側面に沿わせて配設される表面に保温材保持具が取り付けられる下部金具とからなり、
前記上部金具と前記下部金具が、前記角形ダクトを囲んで固定するための固定部を備えてなり、
前記上部金具は、角形ダクトの上面に沿わせる上面フラットバーと、角形ダクトの側面に沿わせる側面フラットバーとからなり、前記上面フラットバーは、角形ダクトの幅寸法より長くとられ、角形ダクトから側方にはみ出した先端部分が下部金具との固定部を構成し、
側面フラットバーは、角形ダクトの高さ寸法より長くとられ、角形ダクトから下方にはみ出した先端部を外方に折り曲げてフランジ状の固定部を構成してなり、
前記下部金具は、角形ダクトの下面に沿わせる下面フラットバーと、角形ダクトの側面に沿わせる側面フラットバーとからなり、前記下面フラットバーは、角形ダクトの幅寸法より長くとられ、角形ダクトから側方にはみ出した先端部分が上部金具との固定部を構成し、
側面フラットバーは、角形ダクトの高さ寸法より長くとられ、角形ダクトから上方にはみ出した先端部を外方に折り曲げてフランジ状の固定部を構成してなることを特徴とする前項（１）又は（２）に記載のダクトへの保温材取付用具。 (3) In order to safely and reliably attach and support the heat insulating material to the rectangular duct through which a high temperature or ultra-low temperature gas that requires a thickness of 150 mm or more to be installed on the outer periphery is necessary, the outer periphery of the rectangular duct is provided. It is a heat insulating material tool that is worn and used,
An upper metal fitting to which a heat insulating material holder is attached to a surface disposed along the upper surface and one side surface of the rectangular duct, and a surface disposed along the lower surface and the other side surface of the rectangular duct. It consists of a lower bracket to which a heat insulating material holder is attached,
The upper metal fitting and the lower metal fitting are provided with a fixing portion for surrounding and fixing the rectangular duct,
The upper metal fitting is composed of an upper flat bar extending along the upper surface of the rectangular duct and a side flat bar extending along the side surface of the rectangular duct, and the upper flat bar is longer than the width of the rectangular duct. The tip that protrudes to the side forms a fixed part with the lower bracket,
The side flat bar is made longer than the height of the rectangular duct, and the tip that protrudes downward from the rectangular duct is bent outward to form a flange-shaped fixed part.
The lower bracket is composed of a lower flat bar extending along the lower surface of the rectangular duct and a side flat bar extending along the side surface of the rectangular duct, and the lower flat bar is longer than the width of the rectangular duct. The tip that protrudes to the side constitutes a fixed part with the upper bracket,
The side flat bar is longer than the height of the rectangular duct, and is configured to form a flange-shaped fixing portion by bending the tip portion protruding upward from the rectangular duct outwardly (1) Or the heat insulating material attachment tool to the duct as described in (2).

（４）前記保温材保持具が、前記上部金具の上面フラットバー及び側面フラットバー、又は側面フラットバーのみに、並びに前記下部金具の下面フラットバー及び側面フラットバーに、保温材保持具が備えられてなることを特徴とする前項（１）〜（３）のいずれか１項に記載のダクトへの保温材取付用具。 (4) The heat insulating material holder is provided with only the upper surface flat bar and the side surface flat bar of the upper metal fitting, or the side surface flat bar, and the lower surface flat bar and the side surface flat bar of the lower metal fitting. The tool for attaching a heat insulating material to the duct according to any one of the preceding items (1) to (3), wherein

（５）前記上部金具の上面フラットバーと側面フラットバーがＬ型フラットバーで構成され、前記下部金具の下面フラットバーと側面フラットバーが、Ｌ型フラットバーで構成されていることを特徴とする前項（１）〜（４）のいずれか１項に記載のダクトへの保温材取付用具。 (5) The upper flat bar and the side flat bar of the upper metal fitting are constituted by L-shaped flat bars, and the lower flat bar and the side flat bar of the lower metal fitting are constituted by L-shaped flat bars. The heat insulating material attachment tool to the duct according to any one of (1) to (4).

（６）前記固定部の角形ダクトからのはみ出し幅が、前記ダクトの外周に密着させる板状の保温材の厚みに等しくとられてなることを特徴とする前項（３）〜（５）のいずれか１項に記載のダクトへの保温材取付用具。 ( 6 ) Any one of the preceding items ( 3 ) to ( 5 ), wherein the protruding width of the fixed portion from the rectangular duct is equal to the thickness of the plate-shaped heat insulating material adhered to the outer periphery of the duct. A heat insulating material attaching tool to the duct according to claim 1.

（７）前項（１）〜（６）に記載のダクトへの保温材取付用具を用いて行う角形ダクトへの保温材の取付けが、
ａ．前記上部金具の上面フラットバーの固定部と下部金具の側面フラットバーの固定部、下部金物の下面フラットバーの固定部と上部金物の側面フラットバーの固定部とが互いに当接するようにして角形ダクトの外周を囲い、当接し合った固定部をタッピングビスで接合して前記角形ダクトに固定する作業を、角形ダクトの延長方向に所定の間隔を開けて実施する第１工程と、
ｂ．角形ダクトの延長方向に所定の間隔で固定されたダクトへの保温材取付用具の保温材保持具に板状の保温材を複数枚装着して角形ダクトの外周を前記板状の保温材で囲繞する第２工程と、
ｃ．角形ダクトの外周を囲繞した板状の保温材の外周にフェルト状の保温材を巻き付け、前記板状の保温材及びフェルト状の保温材を貫通した保温材保持具の先端に保温材留具を装着してすべての保温材をダクトに固定する第３工程と、
ｄ．前記固定されたフェルト状の保温材の外周に亀甲金網を巻き付け、前記板状の保温材及びフェルト状の保温材を前記角形ダクトに確実に密着、固定させる第４工程と
で行われてなるものであることを特徴とするダクトへの保温材の取付方法。 ( 7 ) The heat insulating material is attached to the rectangular duct using the heat insulating material attaching tool to the duct described in the preceding paragraphs (1) to ( 6 ).
a. A rectangular duct in which the upper flat bar fixing portion of the upper metal fitting and the side flat bar fixing portion of the lower metal fitting, the lower flat bar fixing portion of the lower hardware and the side flat bar fixing portion of the upper hardware are in contact with each other. A first step of carrying out the work of fixing the rectangular duct by fixing the abutting fixed portions with a tapping screw and fixing the rectangular duct in the extending direction of the rectangular duct;
b. A plurality of plate-shaped heat insulating materials are mounted on the heat insulating material holder of the heat insulating material attaching tool to the duct fixed at a predetermined interval in the extension direction of the rectangular duct, and the outer periphery of the square duct is surrounded by the plate-shaped heat insulating material. A second step of
c. A felt-shaped heat insulating material is wound around the outer periphery of a plate-shaped heat insulating material surrounding the outer periphery of the rectangular duct, and a heat insulating material fastener is attached to the end of the heat insulating material holder penetrating the plate-shaped heat insulating material and the felt-shaped heat insulating material. A third step of attaching and fixing all the heat insulating materials to the duct;
d. Wrapping a turtle shell metal wire around the fixed felt-shaped heat insulating material, and performing the fourth step of securely attaching and fixing the plate-shaped heat insulating material and the felt-shaped heat insulating material to the rectangular duct. A method of attaching a heat insulating material to a duct, characterized by being:

（８）前記板状の保温材がロックウール、又はグラスウールであることを特徴とする前項（７）に記載のダクトへの保温材の取付方法。 ( 8 ) The method for attaching a heat insulating material to a duct as described in ( 7 ) above, wherein the plate-shaped heat insulating material is rock wool or glass wool.

本発明のダクトへの保温材の取付用具及びそれを用いる保温材の取付方法によって下記の効果が発揮される。
〈１〉本発明のダクトへの保温材の取付用具が、角型ダクトに、前記保温材を安全、確実に取り付け、支持するために前記角形ダクトの外周に装着して使用されるものであり、前記角形ダクトの上面と一方の側面に沿わせて配設される表面に保温材保持具が取り付けられる上部金具と、前記角形ダクトの下面ともう一方の側面に沿わせて配設される表面に保温材保持具が取り付けられる下部金具とからなり、前記上部金具と前記下部金具が、前記角形ダクトを囲んで固定されるための固定部を備えているので、作業現場で前記上部金具と下部金具とをその固定部を合わせ接合させタッピングビス等の結合部材で結合することにより、現場の状況に応じて角形ダクトの必要な個所に随時容易に取り付けられ、保温材をより安全、確実に取り付け保持することできる。
特に、前記角形ダクトが、その外周に１５０ｍｍ以上の厚みを有する保温材の装着が必要となる高温又は超低温の気体を流すものにあっては、従来前記保温材保持具としての全ねじボルト又はスタッドボルト装着用のナットを予め前記角形ダクトに溶接しておく必要がなくなり、溶接に不向きであった板厚の薄いダクトの使用も可能となり、ダクトの軽量化が図れる。
そして上記効果によって、ダクトの取付作業の効率化が図れ、工期の短縮、経費の節減にも寄与する。
さらに現場における追加溶接に基づく黒皮の発生も皆無となり、施工ダクトの品質保証も確実となる。 The following effects are exhibited by the tool for attaching the heat insulating material to the duct of the present invention and the method for attaching the heat insulating material using the same.
<1> A tool for attaching a heat insulating material to a duct according to the present invention is used by being mounted on the outer periphery of the rectangular duct in order to safely and reliably attach and support the heat insulating material to the square duct. An upper metal fitting to which a heat insulating material holder is attached to a surface disposed along the upper surface and one side surface of the rectangular duct, and a surface disposed along the lower surface and the other side surface of the rectangular duct. A lower metal fitting to which a heat retaining material holder is attached, and the upper metal fitting and the lower metal fitting are provided with a fixing portion for fixing the rectangular duct around the square duct. By attaching the metal fittings together with their fixed parts and joining them with a tapping screw or other coupling member, it can be easily attached to the required location of the square duct according to the situation at the site, and the heat insulating material can be attached more safely and securely. Able to equity.
In particular, in the case where the square duct flows a high-temperature or ultra-low-temperature gas that requires the installation of a heat insulating material having a thickness of 150 mm or more on the outer periphery thereof, all screw bolts or studs conventionally used as the heat insulating material holder It is no longer necessary to weld a bolt mounting nut to the rectangular duct in advance, and it is possible to use a duct with a thin plate thickness that is unsuitable for welding, thereby reducing the weight of the duct.
Due to the above effects, the efficiency of duct installation work can be improved, and the construction period can be shortened and the cost can be reduced.
In addition, there will be no black skin due to additional welding on site, and the quality assurance of the construction duct will be ensured.

〈２〉前記上部金具が、角形ダクトの上面に沿わせる上面フラットバーと、角形ダクトの側面に沿わせる側面フラットバーとからなり、前記上面フラットバーは、角形ダクトの幅寸法より長くとられ、角形ダクトから側方にはみ出した先端部分が下部金具との固定部を構成し、前記側面フラットバーは角形ダクトの高さ寸法より長くとられ、角形ダクトから下方にはみ出した先端部を外方に折り曲げてフランジ状の固定部を構成してなり、
また、前記下部金具は、角形ダクトの下面に沿わせる下面フラットバーと、角形ダクトの側面に沿わせる側面フラットバーとからなり、前記下面フラットバーは、角形ダクトの幅寸法より長くとられ、角形ダクトから側方にはみ出した先端部分が上部金具との固定部を構成し、側方フラットバーは、角形ダクトの高さ寸法より長くとられ、角形ダクトから上方にはみ出した先端部を外方に折り曲げてフランジ状の固定部を構成しており、また前記上部金具の上面フラットバーと側面フラットバー、下部金具の下面フラットバーと側面フラットバーとがＬ型フラットバーで構成されていてもよいので、上部金具及び下部金具は１本のフラットバーを取り付けるダクトの寸法に合わせて折り曲げることによって容易に製造でき、外形寸法の異なるダクトへの保温材装着にも容易に適応できる。 <2> The upper metal fitting is composed of an upper surface flat bar along the upper surface of the rectangular duct and a side flat bar along the side surface of the rectangular duct, and the upper surface flat bar is longer than the width of the rectangular duct, The tip that protrudes laterally from the square duct forms a fixed part with the lower bracket, and the side flat bar is longer than the height of the square duct, and the tip that protrudes downward from the square duct is outward. Folded to form a flange-shaped fixed part,
Further, the lower bracket is composed of a lower flat bar along the lower surface of the rectangular duct and a side flat bar along the side surface of the rectangular duct, and the lower flat bar is longer than the width of the rectangular duct. The tip that protrudes laterally from the duct forms a fixed part with the upper bracket, and the side flat bar is longer than the height of the rectangular duct, and the tip that protrudes upward from the rectangular duct is outward. The flange-shaped fixed part is formed by bending, and the upper flat bar and the side flat bar of the upper metal fitting, and the lower flat bar and the side flat bar of the lower metal fitting may be constituted by an L-shaped flat bar. The upper metal fitting and the lower metal fitting can be easily manufactured by bending according to the size of the duct to which one flat bar is attached, and have different external dimensions. It can be readily adapted to the thermal insulation material mounted on transfected.

〈３〉前記上部金具の上面フラットバー及び側面フラットバー、又は側面フラットバーのみに、並びに前記下部金具の下面フラットバー及び側面フラットバーに、保温材保持具が備えられているので、従前のように予めダクトに溶接されたナットに保護材保持具としての全ねじボルト又はスタッドボルトを一つずつ取り付けていく必要がなく、現場作業が容易となり作業効率の向上がはかれる。 <3> Since the upper surface flat bar and the side surface flat bar of the upper metal fitting, or only the side surface flat bar, and the lower surface flat bar and the side surface flat bar of the lower metal fitting are equipped with heat insulating material holders, In addition, it is not necessary to attach all the screw bolts or stud bolts as protective material holders one by one to the nuts welded to the duct in advance, so that field work is facilitated and work efficiency is improved.

〈４〉前記上部金具と下部金具の固定部が、当接した固定部同士をタッピングビスで結合可能に構成されているので、作業現場において上部金具と下部金具を前記角形ダクトに密着させた後に前記当接固定部にねじ穴を穿ってタッピングビスで固定でき、本発明のダクトへの保温材の取付金具を緩みなく取り付けられ、保温材の安定、確実な支持と、良好な保温効果を実現することができる。 <4> Since the fixed portions of the upper metal fitting and the lower metal fitting are configured so that the fixed portions that come into contact with each other can be coupled with a tapping screw, the upper metal fitting and the lower metal fitting are brought into close contact with the rectangular duct at the work site. A screw hole can be drilled in the abutment fixing part and fixed with a tapping screw, and the heat-insulating material mounting bracket can be attached to the duct of the present invention without loosening, realizing a stable and reliable support of the heat-insulating material and good heat-insulating effect can do.

〈５〉前記固定部の角形ダクトからのはみ出し幅が、前記ダクトの外周に密着させる板状の保温材の厚みに等しくとられているので、前記板状の保温材を重ねて装着する際、前記保温材を密着させることができ、良好な保温効果が維持できる。 <5> Since the protruding width of the fixed part from the rectangular duct is equal to the thickness of the plate-shaped heat insulating material to be in close contact with the outer periphery of the duct, The heat insulating material can be brought into close contact, and a good heat insulating effect can be maintained.

〈６〉本発明のダクトへの保温材取付用具を用いて行う角形ダクトへの保温材の取付方法が、
ａ．前記上部金具の上面フラットバーの固定部と下部金具の側面フラットバーの固定部、下部金物の下面フラットバーの固定部と上部金物の側面フラットバーの固定部とが互いに当接するようにして角形ダクトの外周を囲い、当接し合った固定部をタッピングビスで接合して前記角形ダクトに固定する作業を、角形ダクトの延長方向に所定の間隔を開けて実施する第１工程と、
ｂ．角形ダクトの延長方向に所定の間隔で固定されたダクトへの保温材取付用具の保温材保持具に板状の保温材を複数枚装着して角形ダクトの外周を前記板状の保温材で囲繞する第２工程と、
ｃ．角形ダクトの外周を囲繞した板状の保温材の外周にフェルト状の保温材を巻き付け、前記板状の保温材及びフェルト状の保温材を貫通した保温材保持具の先端に保温材留具を装着してすべての保温材をダクトに固定する第３工程と、
ｄ．前記固定されたフェルト状の保温材の外周に亀甲金網を巻き付け、前記板状の保温材及びフェルト状の保温材を前記角形ダクトに確実に密着、固定させる第４工程と
でなるので、作業現場では上部金具と下部金具の接合した固定部にタッピングビス用のねじ穴を穿つ以外には特段に加工を施す必要はなく、手順に従って順次組み上げていくだけで、厚みが１５０ｍｍを超える保温材を角形ダクトへ容易、かつ確実に取り付けられることから、作業効率の向上、作業期間の短縮、ひいては経費の節減が図れる。
また現場での状況によって保温材保持具としての全ねじボルトまたはスタッドボルトの本数増加が必要となった場合でも、本発明のダクトへの保温材取付用具の追加取付で処理でき、従来の行われてきたダクトへのナットの追加溶接によるのと比べ各段に容易で、かつ確実に作業が進められ、工期の延長が回避できる。 <6> A method of attaching the heat insulating material to the rectangular duct using the heat insulating material attaching tool to the duct of the present invention,
a. A rectangular duct in which the upper flat bar fixing portion of the upper metal fitting and the side flat bar fixing portion of the lower metal fitting, the lower flat bar fixing portion of the lower hardware and the side flat bar fixing portion of the upper hardware are in contact with each other. A first step of carrying out the work of fixing the rectangular duct by fixing the abutting fixed portions with a tapping screw and fixing the rectangular duct in the extending direction of the rectangular duct;
b. A plurality of plate-shaped heat insulating materials are mounted on the heat insulating material holder of the heat insulating material attaching tool to the duct fixed at a predetermined interval in the extension direction of the rectangular duct, and the outer periphery of the square duct is surrounded by the plate-shaped heat insulating material. A second step of
c. A felt-shaped heat insulating material is wound around the outer periphery of a plate-shaped heat insulating material surrounding the outer periphery of the rectangular duct, and a heat insulating material fastener is attached to the end of the heat insulating material holder penetrating the plate-shaped heat insulating material and the felt-shaped heat insulating material. A third step of attaching and fixing all the heat insulating materials to the duct;
d. It is a fourth step in which a turtle shell wire mesh is wrapped around the fixed felt-shaped heat insulating material, and the plate-shaped heat insulating material and the felt-shaped heat insulating material are securely adhered and fixed to the rectangular duct. Then, there is no need to make any special processing other than drilling a tapping screw screw hole in the fixed part where the upper and lower metal parts are joined. By simply assembling sequentially according to the procedure, a heat insulating material with a thickness exceeding 150 mm is formed into a rectangular duct. Since it can be easily and securely attached, the work efficiency can be improved, the work period can be shortened, and the cost can be reduced.
Even if it is necessary to increase the number of all screw bolts or stud bolts as a heat insulating material holder due to the situation at the site, it can be handled by adding the heat insulating material mounting tool to the duct of the present invention, which is the conventional method. Compared to the additional welding of nuts to the duct, the work is easier and more reliable at each stage, and the extension of the construction period can be avoided.

〈７〉前記板状の保温材がロックウール、又はグラスウールであるので高温の気体を流すダクトへの安全な使用と良好な保温効果が期待できる。 <7> Since the plate-shaped heat insulating material is rock wool or glass wool, safe use for a duct through which a high-temperature gas flows can be expected and a good heat insulating effect can be expected.

本発明のダクトへの保温材取付用具の構成斜視図The structure perspective view of the heat insulating material attachment tool to the duct of this invention 本発明のダクトへの保温材取付用具を用いて保温材が取り付けられたダクトの構造を示す一部断面斜視図The partial cross section perspective view which shows the structure of the duct in which the heat insulating material was attached using the heat insulating material attachment tool to the duct of the present invention ダクトへの保温材取付用具を用いたダクトへの保温材取付方法の第１工程終了時の状態図State diagram at the end of the first step of the method of attaching the heat insulating material to the duct using the heat insulating material attaching tool to the duct ダクトへの保温材取付用具を用いたダクトへの保温材取付方法の第２工程でダクト側面に保温材を取り付け終えた時点の状態図State diagram when the heat insulation material is completely attached to the side of the duct in the second step of the method of attaching the heat insulation material to the duct using the tool for attaching the heat insulation material to the duct. ダクトへの保温材取付用具を用いたダクトへの保温材取付方法の第２工程終了時の状態図State diagram at the end of the second step of the method of attaching the heat insulating material to the duct using the heat insulating material attaching tool to the duct ダクトへの保温材取付用具を用いたダクトへの保温材取付方法の第３工程でダクト側面に保温材を取り付け終えた状態の時点の状態図State diagram at the time when the heat insulating material has been attached to the side of the duct in the third step of the method of attaching the heat insulating material to the duct using the tool for attaching the heat insulating material to the duct. ダクトへの保温材取付用具を用いたダクトへの保温材取付方法の第４工終了時の状態図State diagram at the end of the 4th work of the method of attaching the heat insulating material to the duct using the heat insulating material attaching tool to the duct

本発明のダクトへの保温材取付用具及びそれを用いる保温材の取付方法を実施するための形態を、実施例の図面に基づいて説明する。
図１は本発明のダクトへの保温材取付用具の構成斜視図、図２は本発明のダクトへの保温材取付用具を用いて保温材が取り付けられたダクトの構造を示す一部断面斜視図であり、図３−１〜図３−５は本発明のダクトへの保温材取付用具を用いたダクトへの保温材取付方法の説明図であって、図３−１は第１工程終了時の時の状態、図３−２は第２工程でダクト側面に保温材を取り付け終えた時点の状態、図３−３は第２工程終了時の状態、図３−４は第３工程終了時の状態、図３−５は第４項工程終了時の状態を示す。
図において１０はダクトへの保温材の取付用具、１１は上部金具、１２は下部金具、１１ａ，１１ｂ上部金具の固定部、１１１は上面フラットバー、１１２は側面フラットバー、１２ａ、１２ｂは下部金具の固定部、１２１は下面フラットバー、１２２は側面フラットバー、１３は保温材保持具、１４はタッピングビス、１５は保温材留具、２０は角形ダクト、３０は板状の保温材、４０はフェルト状の保温材、５０は亀甲金網を示す。 The form for implementing the heat insulating material attachment tool to the duct of this invention and the heat insulating material attachment method using the same is demonstrated based on drawing of an Example.
FIG. 1 is a perspective view of a configuration of a heat insulating material attaching tool to a duct according to the present invention, and FIG. 2 is a partially sectional perspective view showing a structure of a duct in which a heat insulating material is attached using the heat insulating material attaching tool to the duct according to the present invention. FIGS. 3-1 to 3-5 are explanatory views of a method of attaching the heat insulating material to the duct using the heat insulating material attaching tool to the duct of the present invention, and FIG. 3-2 is the state when the heat insulating material is completely attached to the side of the duct in the second step, FIG. 3-3 is the state at the end of the second step, and FIG. 3-4 is the end of the third step. FIG. 3-5 shows a state at the end of the fourth item process.
In the figure, 10 is a tool for attaching a heat insulating material to a duct, 11 is an upper metal fitting, 12 is a lower metal fitting, 11a and 11b upper metal fitting fixing parts, 111 is an upper flat bar, 112 is a side flat bar, and 12a and 12b are lower metal fittings. , 121 is a bottom flat bar, 122 is a side flat bar, 13 is a heat insulating material holder, 14 is a tapping screw, 15 is a heat insulating material fastener, 20 is a rectangular duct, 30 is a plate-shaped heat insulating material, and 40 is A felt-shaped heat insulating material, 50 is a turtle shell metal mesh.

本発明のダクトへの保温材取付用具１０は、図１及び図２に示すように、前記角形ダクト２０の上面と一方の側面に沿わせて配設され、その表面に保温材保持具１３が取り付けられる上部金具１１と、前記角形ダクト２０の下面ともう一方の側面に沿わせて配設され、その表面に保温材保持具１３が取り付けられる下部金具１２とで構成されている。
そして、前記上部金具１１は、前記角形ダクト２０の上面に沿わせる上面フラットバー１１１と、角形ダクト２０の側面に沿わせる側面フラットバー１１２とからなり、前記上面フラットバー１１１は、角形ダクト２０の幅寸法より長くとられ、角形ダクトから側方にはみ出した先端部分が下部金具１２との固定部１１ａを構成し、前記上部金具１１の側面フラットバー１１２は、角形ダクト２０の高さ寸法より長くとられ、角形ダクト２０から下方にはみ出した先端部を外方に折り曲げてフランジ状の固定部１１ｂを形成している。
また、前記下部金具１２は、角形ダクト２０の下面に沿わせる下面フラットバー１２１と、角形ダクト２０の側面に沿わせる側面フラットバー１２２とからなり、前記下面フラットバー１２１は、角形ダクト２０の幅寸法より長くとられ、角形ダクト２０から側方にはみ出した先端部分が上部金具１１との固定部１２ａを形成し、前記下部金具１２の側面フラットバー１１２は、角形ダクト２０の高さ寸法より長くとられ、角形ダクト２０から上方にはみ出した先端部を外方に折り曲げてフランジ状の固定部１２ｂを形成している。
そして前記上部金具１１の側面フラットバー１１２と、前記下部金具１２の下面フラットバー１２１及び側面フラットバー１２２には、前記保温材保持具１３が備えられている。
なお、前記保温材保持具１３を上部金具１１の上面フラットバー１１１に備えられることがあってもよい。
なお各フラットバー１１１、１１２，１２１、１２２への保温材保持具１３の装着は高温気体を扱うダクトに取り付けることに鑑みて溶接によって行われることが好ましい。 As shown in FIGS. 1 and 2, the heat insulating material attaching tool 10 to the duct of the present invention is disposed along the upper surface and one side surface of the rectangular duct 20, and the heat insulating material holder 13 is provided on the surface thereof. The upper metal fitting 11 to be attached, and the lower metal fitting 12 which is disposed along the lower surface and the other side surface of the rectangular duct 20 and to which the heat insulating material holder 13 is attached.
The upper metal part 11 includes an upper surface flat bar 111 along the upper surface of the rectangular duct 20 and a side flat bar 112 along the side surface of the rectangular duct 20, and the upper surface flat bar 111 is formed of the rectangular duct 20. The front end portion that is longer than the width dimension and protrudes laterally from the rectangular duct forms a fixing portion 11a with the lower metal fitting 12, and the side flat bar 112 of the upper metal fitting 11 is longer than the height dimension of the rectangular duct 20. The leading end protruding downward from the rectangular duct 20 is bent outward to form a flange-shaped fixing portion 11b.
The lower metal fitting 12 includes a lower flat bar 121 extending along the lower surface of the rectangular duct 20 and a side flat bar 122 extending along the side surface of the rectangular duct 20, and the lower flat bar 121 has a width of the rectangular duct 20. The tip portion that is longer than the dimension and protrudes laterally from the rectangular duct 20 forms a fixing portion 12a with the upper metal fitting 11, and the side flat bar 112 of the lower metal fitting 12 is longer than the height dimension of the rectangular duct 20. The leading end protruding upward from the rectangular duct 20 is bent outward to form a flange-shaped fixing portion 12b.
The heat insulating material holder 13 is provided on the side flat bar 112 of the upper metal fitting 11, the lower flat bar 121 and the side flat bar 122 of the lower metal fitting 12.
The heat insulating material holder 13 may be provided on the upper flat bar 111 of the upper metal fitting 11.
In addition, it is preferable that welding of the heat insulating material holder 13 to each flat bar 111, 112, 121, 122 is performed by welding in view of attaching to a duct that handles high-temperature gas.

また、前記上部金具１１の上面フラットバー１１１と側面フラットバー１１２がＬ型に折り曲げられた１本のフラットバーで構成され、前記下部金具１２の下面フラットバー１２１と側面フラットバー１２２が、Ｌ型に折り曲げられた１本のフラットバーで構成されてなることも好ましい。
さらに、前記固定部１１ａ，１２ａ、１１ｂ、１２ｂの角形ダクト２０からのはみ出し幅が、前記ダクト２０の外周に密着させる板状の保温材３０の厚みに等しくとられることが望ましい。
そして前記上部金具１１の上面フラットバー１１１の固定部１１ａと、下部金具１２の側面フラットバー１２２の固定部１２ｂ、前記上部金具１１の側面フラットバー１１２の固定部１１ｂと下部金具１２の下面フラットバー１２１の固定部１２ａとが、当接してタッピングビス１４（図３−１参照）で結合できるよう構成されている。
図１の実施例では保温材保持具１３を全ねじボルトで示したが、前記保温材保持具１３としてスタッドボルトなど保温材を取り付けて安全、確実に保持できる部材の使用を妨げるものではない。 In addition, the upper surface flat bar 111 and the side surface flat bar 112 of the upper metal part 11 are constituted by one flat bar bent into an L shape, and the lower surface flat bar 121 and the side surface flat bar 122 of the lower metal part 12 are formed as an L type. It is also preferable that it is composed of a single flat bar that is bent into two.
Furthermore, it is desirable that the protruding width of the fixing portions 11 a, 12 a, 11 b, and 12 b from the rectangular duct 20 is equal to the thickness of the plate-shaped heat insulating material 30 that is in close contact with the outer periphery of the duct 20.
And the fixing | fixed part 11a of the upper surface flat bar 111 of the said upper metal fitting 11, the fixing part 12b of the side flat bar 122 of the lower metal fitting 12, the fixing part 11b of the side flat bar 112 of the said upper metal fitting 11, and the lower surface flat bar of the lower metal fitting 12 The fixed portion 12a of 121 is configured to come into contact and be coupled with a tapping screw 14 (see FIG. 3A).
In the embodiment of FIG. 1, the heat insulating material holder 13 is shown as a full screw bolt, but this does not prevent the use of a member that can hold a heat insulating material such as a stud bolt as the heat insulating material holder 13 and can hold it safely and reliably.

次ぎに、本発明のダクトへの保温材取付用具１０を用いて行う角形ダクト２０への保温材３０、４０の取付方法について図３−１〜図３−５に基づいて説明する。
本発明のダクトへの保温材取付用具１０を用いて行う角形ダクト２０への保温材３０、４０の取付は、
ａ．前記上部金具１１の上面フラットバー１１１の固定部１１ａと下部金具１２の側面フラットバー１２２の固定部１２ｂ、下部金物１２の下面フラットバー１２１の固定部１２ａと上部金具１１の側面フラットバー１１２の固定部１１ｂとが互いに当接するようにして角形ダクト２０の外周を囲い、当接し合った固定部１１ａと１２ｂ、１１ｂと１２ａとをタッピングビス１４で接合して前記角形ダクト２０に固定する作業を、角形ダクト２０の延長方向に所定の間隔を開けて実施する（図３−１参照）第１工程と、
ｂ．角形ダクト２０の延長方向に所定の間隔で固定されたダクトへの保温材取付用具１０の保温材保持具１３に板状の保温材３０を複数枚装着して角形ダクト２０の外周を前記板状の保温材３０で囲繞する（図３−３参照）第２工程と、
ｃ．角形ダクト２０の外周を囲繞した板状の保温材３０の外周にフェルト状の保温材４０を巻き付け、前記板状の保温材３０及びフェルト状の保温材４０を貫通した保温材保持具１３の先端に保温材留具１５（ワッシャ１５ａ、ナット１５ｂ）を装着してすべての保温材３０、４０を前記角形ダクト２０に固定する（図３−４参照）第３工程と、
ｄ．前記固定されたフェルト状の保温材４０の外周に亀甲金網５０を巻き付ける（図３−５参照）第４工程と
で構成されている。 Next, a method of attaching the heat insulating materials 30 and 40 to the rectangular duct 20 using the heat insulating material attaching tool 10 to the duct of the present invention will be described based on FIGS. 3-1 to 3-5.
The heat insulating materials 30 and 40 are attached to the rectangular duct 20 using the heat insulating material attaching tool 10 to the duct of the present invention.
a. The fixing part 11a of the upper surface flat bar 111 of the upper metal part 11 and the fixing part 12b of the side surface flat bar 122 of the lower metal part 12, and the fixing part 12a of the lower surface flat bar 121 of the lower metal part 12 and the side flat bar 112 of the upper metal part 11 are fixed. An operation of surrounding the outer periphery of the rectangular duct 20 so that the portions 11b abut each other, and fixing the abutting fixing portions 11a and 12b, 11b and 12a to the rectangular duct 20 by joining with the tapping screws 14, A first step that is carried out at a predetermined interval in the extending direction of the rectangular duct 20 (see FIG. 3A);
b. A plurality of plate-shaped heat insulating materials 30 are attached to the heat insulating material holder 13 of the heat insulating material attaching device 10 to the duct fixed at a predetermined interval in the extension direction of the rectangular duct 20, and the outer periphery of the rectangular duct 20 is formed into the plate shape. A second step surrounded by a heat insulating material 30 (see FIG. 3-3);
c. A felt-shaped heat insulating material 40 is wound around the outer periphery of a plate-shaped heat insulating material 30 surrounding the outer periphery of the rectangular duct 20, and the tip of the heat insulating material holder 13 penetrating the plate-shaped heat insulating material 30 and the felt-shaped heat insulating material 40. A third step of fixing all the heat insulating materials 30 and 40 to the rectangular duct 20 by attaching the heat insulating material fasteners 15 (washers 15a and nuts 15b) to the rectangular duct 20;
d. It is comprised by the 4th process which winds the turtle shell metal-mesh 50 around the outer periphery of the said fixed felt-shaped heat insulating material 40 (refer FIG. 3-5).

なお第２工程においては、図３−２の示すようにまず側面フラットバー１１２、１２２（図１参照）に溶接された保温材保持具１３である全ねじボルト又はスタッドボルトに板状の保温材３０複数枚を取り付け、その後上部フラットバー１１１上に板状の保温材を複数枚載置、さらに下部フラットバー１２１に溶接された保温材保持具１３である全ねじボルト又はスタッドボルトに板状の保温材３０複数枚取り付け、この下面フラットバー１２１の保温材保持具１３に取り付けた板状の保温材３０の落下を防止する手段を施した後に第３工程に移ることが好ましい。
また、第３工程においてフェルト状の保温材４０を巻き付ける際、前記フェルト状の保温材４０の両端部をダクトの上面で合わせるようにして取り付け、前記下面フラットバー１２１に取り付けた保温材保持具１３の先端に装着された保温材留具が万一脱落した場合でも、板状の保温材３０の落下が防止できるようにしておくことも好ましい。
さらに、本実施例では保温材保持具１３を全ねじボルト又はスタッドボルトとしたので保温材留具１５をワッシャ１５ａとナット１５ｂで構成したが、保温材をダクトに安全かつ確実に取り付けられ保持されるのであれば、どのような保温材保持具１３と保温材留具１５との組み合わせが選択され、使用されるのを妨げるものではない。
そして、前記ダクトへの保温材取付用具１０の角形ダクト２０への取付間隔が、直線部分では４５０ｍｍ〜５５０ｍｍであることが好ましく、また、前記角形ダクトが水平方向に曲がる部分で使用する前記保温材取付用具１０においては、上部金具１１の上面フラットバー１１１、及び下部金具１２の下面フラットバー１２１の寸法を直線部で使用する保温材取付用具１０のそれらより１０〜１５ｍｍ長くして前記角形ダクト２０と保温材取付用具１０との間に余裕を持たせ、角形ダクト２０に対する保温材取付用具１０の取付角度に自由度を持たせることが好ましい。 In the second step, as shown in FIG. 3-2, a plate-shaped heat insulating material is first attached to all screw bolts or stud bolts which are the heat insulating material holders 13 welded to the side flat bars 112 and 122 (see FIG. 1). After mounting a plurality of 30 sheets, a plurality of plate-shaped heat insulating materials are placed on the upper flat bar 111, and further, a plate-shaped heat insulating material holder 13 welded to the lower flat bar 121 is attached to all screw bolts or stud bolts. It is preferable to move to the third step after attaching a plurality of heat insulating materials 30 and applying means for preventing the plate-shaped heat insulating material 30 attached to the heat insulating material holder 13 of the lower flat bar 121 from dropping.
Further, when the felt-shaped heat insulating material 40 is wound in the third step, both the end portions of the felt-shaped heat insulating material 40 are attached so as to be aligned with the upper surface of the duct, and the heat insulating material holder 13 attached to the lower flat bar 121 is attached. It is also preferable that the plate-shaped heat insulating material 30 can be prevented from falling even if the heat insulating material fastener attached to the tip of the material is dropped.
Further, in this embodiment, since the heat insulating material holder 13 is a full screw bolt or a stud bolt, the heat insulating material fastener 15 is constituted by a washer 15a and a nut 15b. However, the heat insulating material is securely and securely attached to the duct and held. If this is the case, any combination of the heat insulating material holder 13 and the heat insulating material retainer 15 is not selected and used.
And it is preferable that the installation space | interval to the square duct 20 of the heat insulating material installation tool 10 to the said duct is 450 mm-550 mm in a linear part, and the said heat insulating material used in the part where the said square duct bends in a horizontal direction. In the mounting tool 10, the dimensions of the upper surface flat bar 111 of the upper metal fitting 11 and the lower surface flat bar 121 of the lower metal fitting 12 are made 10 to 15 mm longer than those of the heat insulating material mounting tool 10 used in the straight portion, and the rectangular duct 20. It is preferable to provide a degree of freedom in the mounting angle of the heat insulating material mounting tool 10 with respect to the rectangular duct 20 by providing a margin between the heat insulating material mounting tool 10 and the heat insulating material mounting tool 10.

本実施例は、高温の気体や超低温の気体を流す角形ダクトの保温を図るため、厚さが１５０ｍｍ以上の保温材を取り付ける必要がある場合についてのものであるが、それ以外に保温材の厚みがさほど厚くない場合においても、本発明のダクトへの保温材取付用具１０が採用できることは言うまでもない。
また、本発明のダクトへの保温材取付用具１０は、ダクトの素材を問わずに使用できるものである。 The present embodiment is for the case where it is necessary to attach a heat insulating material having a thickness of 150 mm or more in order to keep the rectangular duct through which a high-temperature gas or an ultra-low temperature gas flows. Needless to say, even when the thickness is not so thick, the heat insulating material attaching tool 10 to the duct of the present invention can be employed.
Moreover, the heat insulating material attachment tool 10 to the duct of the present invention can be used regardless of the material of the duct.

１０：ダクトへの保温材取付用具
１１：上部金具、
１１ａ、１１ｂ：上部金具の固定部
１２：下部金具
１２ａ、１２ｂ：下部金具の固定部
１１１：上面フラットバー
１２１：下面フラットバー
１１２、１２２：側面フラットバー
１３：保温材保持具
１４：タッピングビス
１５：保温材留具
１５ａ：ワッシャ
１５ｂ：ナット
２０：角形ダクト
３０：板状の保温材
４０：フェルト状の保温材
５０：亀甲金網
10: Insulation tool for heat insulation to duct 11: Upper metal fitting,
11a, 11b: Fixing part of upper metal fitting 12: Lower metal fitting 12a, 12b: Fixing part of lower metal fitting 111: Upper flat bar 121: Lower flat bar 112, 122: Side flat bar 13: Insulating material holder 14: Tapping screw 15 : Thermal insulation fastener 15a: Washer 15b: Nut 20: Rectangular duct 30: Plate-shaped thermal insulation 40: Felt-shaped thermal insulation 50: Tortoise wire mesh

Claims

A heat insulating material mounting tool (10) used by being attached to the outer periphery of the rectangular duct in order to safely and reliably attach and support the heat insulating material to the square duct (20),
The upper metal fitting (11) to which the heat insulating material holder (13) is attached to the surface disposed along the upper surface and one side surface of the rectangular duct (20), the lower surface of the rectangular duct (20), and the other The lower metal fitting (12) to which the heat insulating material holder (13) is attached on the surface arranged along the side surface of the upper metal fitting (11) and the lower metal fitting (12) are connected to the rectangular duct ( fixing portion for being fixed surround 20) (11a, 11b, 12a , 12b) Ri Na comprise,
The fixing of the upper bracket (11) and a lower bracket (12) (11a, 12b), and (11b, 12a), but the characterized Rukoto a is configured to be coupled with the tapping screw (14) in contact with Insulation tool for heat insulating material to the duct.

The rectangular duct (20) is used for flowing a high-temperature or ultra-low-temperature gas that requires mounting of a heat insulating material having a thickness of 150 mm or more on the outer periphery thereof, and the heat insulating material having a thickness of 150 mm or more is used as the rectangular duct. The heat insulating material mounting tool for a duct according to claim 1, wherein the heat insulating material mounting tool is used for safely and reliably mounting and supporting (20).

A heat insulating material mounting tool (10) used by being attached to the outer periphery of the rectangular duct in order to safely and reliably attach and support the heat insulating material to the square duct (20),
The upper metal fitting (11) to which a heat insulating material holder is attached to the surface arranged along the upper surface and one side surface of the rectangular duct (20), and the lower surface and the other side surface of the rectangular duct (20). It consists of a lower metal fitting (12) to which a heat insulating material holder is attached on the surface arranged along the surface,
The upper metal fitting (11) and the lower metal fitting (12) are provided with fixing portions (11a, 11b, 12a, 12b) for surrounding and fixing the rectangular duct (20),
The upper metal fitting (11) includes an upper flat bar (111) along the upper surface of the rectangular duct (20) and a side flat bar (112) along the side of the rectangular duct (20). (111) is longer than the width of the rectangular duct (20), the tip portion protruding laterally from the rectangular duct constitutes a fixing part (11a) with the lower metal fitting (12),
The side flat bar (112) is longer than the height of the rectangular duct (20), and the front end protruding downward from the rectangular duct (20) is bent outward to form a flange-shaped fixing portion (11b). And
The lower metal fitting (12) includes a lower flat bar (121) along the lower surface of the rectangular duct (20) and a side flat bar (122) along the side of the rectangular duct (20). (121) is longer than the width dimension of the rectangular duct (20), the tip portion protruding laterally from the rectangular duct constitutes a fixing portion (12a) with the upper metal fitting (11),
The side flat bar (112) is longer than the height of the rectangular duct (20), and the front end protruding upward from the rectangular duct (20) is bent outward to form a flange-shaped fixing portion (12b). The heat insulating material attachment tool to the duct according to claim 1 or 2, wherein

The heat insulating material holder (13) is provided only on the upper flat bar (111) and the side flat bar (112) or the side flat bar (112) of the upper metal fitting (11), and on the lower surface of the lower metal fitting (12). The heat insulating material attaching tool to the duct according to any one of claims 1 to 3, wherein the heat insulating material attaching tool is provided on either the flat bar (121) or the side flat bar (122).

The upper flat bar (111) and the side flat bar (112) of the upper metal fitting (11) are L-shaped flat bars, and the lower flat bar (121) and the side flat bar (122) of the lower metal fitting (12) are provided. It is comprised with the L-shaped flat bar, The heat insulating material attachment tool to the duct of any one of Claims 1-4 characterized by the above-mentioned.

The protruding width of the fixing parts (11a, 12a), (11b, 12b) from the rectangular duct (20) is made equal to the thickness of the plate-shaped heat insulating material (30) to be in close contact with the outer periphery of the duct (20). The heat insulating material attaching tool to the duct according to any one of claims 3 to 5 , wherein the heat insulating material is attached to the duct.

Mounting of the heat insulating material to the rectangular duct (20) using the heat insulating material mounting tool (10) to the duct according to claim 1 to 6 ,
a. The fixing part (11a) of the upper flat bar (111) of the upper metal fitting (11), the fixing part (12b) of the side flat bar (122) of the lower metal fitting (12), and the lower flat bar (121) of the lower hardware (12). ) And the fixed part (11b) of the side flat bar (111) of the upper metal piece (12) are in contact with each other so as to surround the outer periphery of the rectangular duct (20) and contact each other. The work of joining the parts (11a, 12b), (12b, 11a) with the tapping screws (14) and fixing them to the rectangular duct (20) is performed at a predetermined interval in the extending direction of the rectangular duct (20). A first step of
b. A plurality of plate-shaped heat insulating materials (30) are attached to the heat insulating material holder (13) of the heat insulating material attaching device (10) to the duct fixed at a predetermined interval in the extending direction of the rectangular duct (20), and the rectangular shape is formed. A second step of surrounding the outer periphery of the duct (20) with the plate-shaped heat insulating material (30);
c. A felt-shaped heat insulating material (40) is wound around the outer periphery of a plate-shaped heat insulating material (30) surrounding the outer periphery of the rectangular duct (20), and the plate-shaped heat insulating material (30) and the felt-shaped heat insulating material (40). A third step of attaching the heat insulating material fastener (14) to the tip of the heat insulating material holder (13) penetrating through and fixing all the heat insulating materials to the duct;
d. A turtle shell wire net (50) is wound around the fixed felt-shaped heat insulating material (40), and the plate-shaped heat insulating material (30) and the felt-shaped heat insulating material (40) are securely attached to the rectangular duct (20). A method of attaching a heat insulating material to a duct, characterized in that it is performed in a fourth step of closely attaching and fixing to a duct.

The method for attaching a heat insulating material to a duct according to claim 7 , wherein the plate-shaped heat insulating material (30) is rock wool or glass wool.