JPH09242214A - Sleeve for duct insertion of fire resistive covering steel frame member - Google Patents
Sleeve for duct insertion of fire resistive covering steel frame memberInfo
- Publication number
- JPH09242214A JPH09242214A JP5190796A JP5190796A JPH09242214A JP H09242214 A JPH09242214 A JP H09242214A JP 5190796 A JP5190796 A JP 5190796A JP 5190796 A JP5190796 A JP 5190796A JP H09242214 A JPH09242214 A JP H09242214A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- sleeve
- duct
- claws
- steel frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Building Environments (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ダクトを耐火被
覆層の厚さを確保して耐火被覆鉄骨部材に貫通させる際
に使用される耐火被覆鉄骨部材のダクト挿通用スリーブ
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sleeve for inserting a duct of a fireproof coated steel member, which is used when the duct has a thickness of the fireproof coated layer and is penetrated through the fireproof coated steel member.
【０００２】[0002]
【従来の技術】耐火被覆鉄骨部材として、図６及び図７
に示す構造が知られている。これらの図は、床版２を支
持する耐火被覆鉄骨梁４を示すものである。2. Description of the Related Art FIG. 6 and FIG.
The structure shown in is known. These figures show a refractory coated steel beam 4 supporting a floor slab 2.
【０００３】耐火被覆梁４は、Ｈ形鋼（鉄骨部材）６の
外周にアスベスト等の耐火被覆材を吹き付けて所定厚さ
の耐火被覆層８を設けた梁である。ここで、Ｈ形鋼６の
ウェブ６ａには、空調用ダクト１０を貫通させるための
貫通孔１２が形成されており、この貫通孔１２の内周側
にも耐火被覆層８が設けられている。The fireproof coated beam 4 is a beam having a fireproof coating layer 8 of a predetermined thickness formed by spraying a fireproof coating material such as asbestos on the outer periphery of an H-shaped steel (steel frame member) 6. Here, the web 6a of the H-section steel 6 is formed with a through hole 12 for penetrating the air conditioning duct 10, and the fireproof coating layer 8 is also provided on the inner peripheral side of the through hole 12. .
【０００４】[0004]
【発明が解決しようとする課題】ところで、上記構造と
した耐火被覆鉄骨梁４の貫通孔１２に、空調用ダクト１
０を貫通する際に、貫通孔１２の内周側に設けた耐火被
覆層８（図７の符号Ａで示す丸印部分）に空調用ダクト
１０が接触し、貫通孔１２の周囲の耐火被覆材が剥がれ
てＨ形鋼６の表面が露出してしまう場合がある。そのた
め、耐火被覆材が剥がれた部分に、再び耐火被覆材を吹
き付ける補修作業を行わなければならず、補修作業のた
めに多くの手間と時間が費やされてしまう。By the way, the air-conditioning duct 1 is provided in the through hole 12 of the fireproof coated steel beam 4 having the above structure.
When passing through 0, the air-conditioning duct 10 comes into contact with the fireproof coating layer 8 (the circled portion indicated by the symbol A in FIG. 7) provided on the inner peripheral side of the throughhole 12, and the fireproof coating around the throughhole 12 is provided. The material may peel off and the surface of the H-section steel 6 may be exposed. Therefore, the repair work of spraying the fireproof covering material again on the portion where the fireproof covering material has been peeled off must be performed, and a lot of trouble and time are spent for the repairing work.
【０００５】そこで、耐火被覆材の吹き付け作業を行う
前に、貫通孔１２にダクト挿通用スリーブを溶接等によ
り固定しておき、このダクト挿通用スリーブにより耐火
被覆層８との接触を防止することが考えられるが、スリ
ーブ固定作業のための多くのの時間が費やされ、作業コ
ストも増大する。また、スリーブ固定作業が完了するま
で、Ｈ形鋼６への耐火被覆材の吹き付け作業を開始する
ことができないので、工事の遅延に繋がるおそれがあ
る。Therefore, before performing the work of spraying the fireproof coating material, a duct insertion sleeve is fixed to the through hole 12 by welding or the like, and the duct insertion sleeve prevents contact with the fireproof coating layer 8. However, much time is spent for fixing the sleeve, and the working cost is increased. Further, the work of spraying the refractory coating material onto the H-section steel 6 cannot be started until the sleeve fixing work is completed, which may lead to a delay in construction.
【０００６】そこで、この発明は上記事情に鑑みてなさ
れたものであり、単純な構造として低廉化を図り、且つ
鉄骨部材への装着作業を容易として耐火被覆材の吹き付
け作業に影響を与えず、且つ耐火被覆層の剥離を確実に
防止することが可能な耐火被覆鉄骨部材のダクト挿通用
スリーブを提供することを目的とする。Therefore, the present invention has been made in view of the above circumstances, has a simple structure and can be manufactured at low cost, and can easily be attached to a steel frame member without affecting the operation of spraying the fireproof coating material. Moreover, it is an object of the present invention to provide a duct insertion sleeve for a fireproof coated steel frame member capable of reliably preventing peeling of the fireproof coating layer.
【０００７】[0007]
【課題を解決するための手段】本発明の請求項１記載の
発明は、ダクトが貫通する貫通孔を形成した鉄骨部材の
周囲に所定厚さの耐火被覆層を形成する際に、前記貫通
孔の周囲の耐火被覆層の厚さを均一とするために前記鉄
骨部材に装着するダクト挿通用スリーブであって、前記
ダクトが挿通するスリーブ本体と、このスリーブ本体の
外周の周方向に所定間隔をあけて固定され、前記貫通孔
の縁部との係合により前記スリーブ本体を前記貫通孔内
に保持する複数のスペーサとを備えている。According to a first aspect of the present invention, when a refractory coating layer having a predetermined thickness is formed around a steel frame member having a through hole through which a duct penetrates, the through hole is formed. A duct insertion sleeve to be attached to the steel frame member in order to make the thickness of the fireproof coating layer around the sleeve body uniform, the sleeve body through which the duct is inserted, and a predetermined interval in the circumferential direction of the outer periphery of the sleeve body. A plurality of spacers that are opened and fixed, and that hold the sleeve body in the through hole by engaging with the edge portion of the through hole.
【０００８】また、請求項２記載の発明は、請求項１記
載の耐火被覆鉄骨部材のダクト挿通用スリーブにおい
て、前記スペーサを、前記スリーブ本体の外周に固定し
た接合板部と、この接合板の縁部から折れ曲がって前記
スリーブ本体側から外方に向けて突出する支持板部とを
備えた矩形板材とし、前記支持板部の先端部に先端から
基端側に向けて２本の切れ込みを入れることにより、こ
れら２本の切れ込みの外側に一対の爪を形成し、この一
対の爪の間に係合片を形成し且つ当該係合片を前記一対
の爪に対して外側又は内側に僅かに折り曲げた形状と
し、前記一対の爪により前記貫通孔近くの両側面を挟み
込むとともに、前記一対の爪間に位置した前記貫通孔の
内周面に対して、外側又は内側に折り曲がった前記係合
片が弾性反力を作用する構造とした。According to a second aspect of the present invention, in the sleeve for inserting the duct of the fireproof coated steel frame member according to the first aspect, the spacer is fixed to the outer periphery of the sleeve body, and a joining plate portion of the joining plate. A rectangular plate member having a supporting plate portion that is bent from an edge portion and protrudes outward from the sleeve body side is formed, and two notches are formed in the distal end portion of the supporting plate portion from the distal end toward the proximal end side. As a result, a pair of claws is formed on the outside of these two notches, an engagement piece is formed between the pair of claws, and the engagement piece is slightly outward or inward with respect to the pair of claws. The bent shape, sandwiching both side surfaces near the through hole by the pair of claws, the engagement bent outward or inward with respect to the inner peripheral surface of the through hole located between the pair of claws One piece acts an elastic reaction force It has a structure.
【０００９】[0009]
【発明の実施の形態】以下、本発明の耐火被覆鉄骨のダ
クト挿通用スリーブの一実施形態について、図面に基づ
いて説明する。なお、図６及び図７に示した構成と同一
構成部分については、同一符号を付してその説明を省略
する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a duct insertion sleeve of a fireproof coated steel frame according to the present invention will be described below with reference to the drawings. The same components as those shown in FIGS. 6 and 7 are designated by the same reference numerals, and the description thereof will be omitted.
【００１０】図１及び図２は、本実施形態のダクト挿通
用スリーブ２０を装着した耐火被覆鉄骨梁２２を示すも
のである。ダクト挿通用スリーブ２０は、空調用ダクト
１０より大径の鋼管からなるスリーブ本体２４と、この
スリーブ本体２２の外周の周方向に９０度の間隔をあけ
て固定された４個のスペーサ２６とで構成されている。FIG. 1 and FIG. 2 show a fireproof coated steel frame beam 22 equipped with a duct insertion sleeve 20 of this embodiment. The duct insertion sleeve 20 includes a sleeve main body 24 made of a steel pipe having a diameter larger than that of the air conditioning duct 10, and four spacers 26 fixed at intervals of 90 degrees in the circumferential direction of the outer circumference of the sleeve main body 22. It is configured.
【００１１】各スペーサ２６は矩形状の金属板により形
成されており、図３に示すように、、長手方向の中央部
に設けられた接合板部２８と、この接合板の両縁部から
側面視逆ハＶ字形となるように折り曲げられた一対の支
持板部３０とを備えている。Each of the spacers 26 is formed of a rectangular metal plate, and as shown in FIG. 3, a joint plate portion 28 provided at the central portion in the longitudinal direction and side surfaces from both edges of the joint plate. It is provided with a pair of support plate portions 30 that are bent so as to have an inverted inverted V shape.
【００１２】そして、各支持板部３０の先端部には、先
端から基端側に向けて互いに平行に２本の切れ込み
Ｃ1 、Ｃ2 が入れられ、これら２本の切れ込みＣ1 、Ｃ
2 の外側に一対の爪３２ａ、３２ｂが形成され、これら
爪３２ａ、３２ｂの間に係合片３４が形成されている。
また、係合片３４は、一対の爪３２ａ、３２ｂより外側
に僅かに折り曲げられている。Then, two notches C 1 and C 2 are made in parallel to each other from the tip to the base end side at the tip of each support plate portion 30, and these two notches C 1 and C are made.
A pair of claws 32a and 32b is formed on the outer side of 2 , and an engagement piece 34 is formed between these claws 32a and 32b.
The engagement piece 34 is slightly bent outward from the pair of claws 32a and 32b.
【００１３】ここで、２本の切れ込みＣ1 、Ｃ2 間の距
離、すなわち一対の爪３２ａ、３２ｂ間の距離Ｌは、Ｈ
形鋼６のウェブ６ａの厚さＴと同一寸法に設定されてい
る。そして、各スペーサ２６は、スリーブ本体２４の外
周の周方向に９０度の間隔をあけた位置に、接合板部２
８を点溶接等の接合手段により接合することにより一体
化され、これにより、一対の支持板部３０はスリーブ本
体２２から放射状に突出する。Here, the distance between the two notches C 1 and C 2 , that is, the distance L between the pair of claws 32a and 32b is H
It is set to have the same dimension as the thickness T of the web 6a of the shaped steel 6. Then, the spacers 26 are provided on the outer circumference of the sleeve body 24 at positions spaced by 90 degrees in the circumferential direction.
8 are integrated by joining by means of joining means such as spot welding, whereby the pair of support plate portions 30 radially projects from the sleeve body 22.
【００１４】上記構成のダクト挿通用スリーブ２０は、
貫通孔１２内にスリーブ本体２４を挿入するとともに、
図５に示すように、４個のスペーサ２６の各一対の爪３
２ａ、３２ｂにより、貫通孔１２近くの両側面を挟み込
むだけで、貫通孔１２内に装着される。この際、係合片
３４は、図４に示すように、貫通孔１２の内周面に当接
して外側に折り曲げられていくが、その弾性反力が貫通
孔１２の内周面に作用して押圧するので、スリーブ本体
２４の径方向の移動が拘束される。The duct insertion sleeve 20 having the above structure is
While inserting the sleeve body 24 into the through hole 12,
As shown in FIG. 5, each pair of claws 3 of the four spacers 26
It is mounted in the through hole 12 only by sandwiching both side surfaces near the through hole 12 by the 2a and 32b. At this time, as shown in FIG. 4, the engagement piece 34 comes into contact with the inner peripheral surface of the through hole 12 and is bent outward, but its elastic reaction force acts on the inner peripheral surface of the through hole 12. Since it is pressed by pressing, the movement of the sleeve body 24 in the radial direction is restricted.
【００１５】そして、貫通孔１２へのダクト挿通用スリ
ーブ２０の装着が完了した後、Ｈ形鋼６の外周に向けて
耐火被覆材の吹き付け作業を行うと、Ｈ形鋼６の表面が
露出せずに耐火被覆層８を均一に設けた耐火被覆鉄骨梁
２２が形成される。After the installation of the sleeve 20 for inserting the duct into the through hole 12 is completed, the surface of the H-section steel 6 is exposed by spraying the fire-resistant coating material toward the outer periphery of the H-section steel 6. Instead, the fireproof coated steel frame beam 22 having the fireproof coating layer 8 uniformly provided is formed.
【００１６】このように、本実施形態のダクト挿通用ス
リーブ２０は、貫通孔１２内にスリーブ本体２４を挿入
し、各スペーサ２６の一対の爪３２ａ、３２ｂで貫通孔
１２近くの両側面を挟み込むことにより、貫通孔１２内
に簡単に装着されるので、スリーブ固定するための作業
時間や作業コストを大幅に低減することができる。As described above, in the duct insertion sleeve 20 of this embodiment, the sleeve body 24 is inserted into the through hole 12, and the pair of claws 32a and 32b of each spacer 26 sandwich both side surfaces near the through hole 12. As a result, since it is easily mounted in the through hole 12, the working time and working cost for fixing the sleeve can be significantly reduced.
【００１７】しかも、貫通孔１２の内周面に当接して外
側に折り曲げられた各スペーサ２６の係合片３４は、自
身の弾性反力により貫通孔１２の内周面を押圧してスリ
ーブ本体２４の径方向の移動を拘束するので、ダクト挿
通用スリーブ２０を貫通孔１２に確実に装着することが
できる。Moreover, the engagement piece 34 of each spacer 26, which is in contact with the inner peripheral surface of the through hole 12 and is bent outward, presses the inner peripheral surface of the through hole 12 by its own elastic reaction force to press the sleeve body. Since the radial movement of 24 is restricted, the duct insertion sleeve 20 can be reliably attached to the through hole 12.
【００１８】また、簡単にダクト挿通用スリーブ２０を
装着することができるので、Ｈ形鋼６に対する耐火被覆
材の吹き付け作業をすぐに開始することができ、工事が
遅延することがない。そして、貫通孔１２にダクト挿通
用スリーブ２０を装着した後にＨ形鋼６の外周に向けて
耐火被覆材の吹き付け作業を行うことにより、貫通孔１
２の周囲などにＨ形鋼６の表面を露出せず均一の耐火被
覆層８を設けることができる。Further, since the duct insertion sleeve 20 can be easily mounted, the work of spraying the refractory coating material on the H-section steel 6 can be immediately started, and the construction work will not be delayed. Then, after the duct insertion sleeve 20 is attached to the through hole 12, the refractory coating material is sprayed toward the outer periphery of the H-shaped steel 6 so that the through hole 1
A uniform refractory coating layer 8 can be provided on the periphery of 2 without exposing the surface of the H-section steel 6.
【００１９】さらに、ダクト挿通用スリーブ２０は、鋼
管からなるスリーブ本体２４と、スリーブ本体の外周の
周方向に等間隔に固定された４個のスペーサ２６とから
なる単純な構成なので、安価なスリーブを提供すること
ができる。Furthermore, since the duct insertion sleeve 20 has a simple structure including a sleeve body 24 made of a steel pipe and four spacers 26 fixed at equal intervals in the circumferential direction of the outer circumference of the sleeve body, the sleeve is inexpensive. Can be provided.
【００２０】なお、本実施形態では、ウェブ６ａに貫通
孔１２を形成したＨ形鋼６を鉄骨部材として説明した
が、本発明の要旨がこれに限定されるものではなく、他
の鋼材、例えばＩ形鋼、丸形鋼管、角形鋼管を鉄骨部材
とし、この鉄骨部材に貫通孔を形成して耐火被覆鉄骨梁
を形成しても同様の作用効果を得ることができる。In the present embodiment, the H-shaped steel 6 having the through holes 12 formed in the web 6a has been described as a steel frame member, but the gist of the present invention is not limited to this, and other steel materials such as, for example, Even if the I-shaped steel, the round steel pipe and the square steel pipe are used as the steel frame member and the through hole is formed in this steel frame member to form the fireproof coated steel beam, the same effect can be obtained.
【００２１】また、本実施形態で示した耐火被覆鉄骨梁
２２のみに限定されるものではなく、耐火被覆鉄骨柱で
あっても、同様の作用効果を得ることができる。また、
スリーブ本体２４の外周に固定されているスペーサ２６
の数は本実施形態のように４個に限るものではなく、ス
リーブ本体２４を確実に保持することができれば増減し
てもよい。Further, the present invention is not limited to the fire-resistant coated steel frame beam 22 shown in the present embodiment, and a fire-resistant coated steel frame column can also obtain the same effect. Also,
Spacer 26 fixed to the outer circumference of the sleeve body 24
The number is not limited to four as in the present embodiment, but may be increased or decreased as long as the sleeve body 24 can be securely held.
【００２２】また、各スペーサ２６の先端部に形成した
係合片３４は、一対の爪３２ａ、３２ｂに対して内側に
折れ曲がっていても、自身の弾性反力により貫通孔１２
の内周面を押圧してスリーブ本体２４の径方向の移動を
拘束することができる。Even if the engaging piece 34 formed at the tip of each spacer 26 is bent inwardly with respect to the pair of claws 32a and 32b, the elastic reaction force of the engaging piece 34 causes the through hole 12 to pass through.
The radial movement of the sleeve body 24 can be restricted by pressing the inner peripheral surface of the.
【００２３】[0023]
【発明の効果】以上説明したように、請求項１記載の耐
火被覆鉄骨部材のダクト挿通用スリーブは、貫通孔内に
スリーブ本体を挿入し、このスリーブ本体の外周の周方
向に所定間隔をあけて固定された複数のスペーサを貫通
孔の縁部に係合することにより、貫通孔内に簡単に装着
することができるので、スリーブ固定のための作業時間
や作業コストを大幅に低減することができる。As described above, in the duct insertion sleeve of the fireproof coated steel frame member according to the first aspect of the present invention, the sleeve body is inserted into the through hole, and a predetermined interval is provided in the circumferential direction of the outer circumference of the sleeve body. By engaging a plurality of spacers that are fixed together in the through hole, the spacers can be easily installed in the through hole, and the work time and work cost for fixing the sleeve can be significantly reduced. it can.
【００２４】また、簡単にダクト挿通用スリーブを装着
することができるので、耐火被覆材の吹き付け作業をす
ぐに開始することができ、工事が遅延することがない。
そして、貫通孔にダクト挿通用スリーブを装着した後、
鉄骨部材の外周に向けて耐火被覆材の吹き付け作業を行
うことにより、貫通孔の周囲などに鉄骨部材の表面を露
出せず均一の耐火被覆層を設けることができる。Further, since the duct insertion sleeve can be easily attached, the work of spraying the fireproof coating material can be immediately started, and the construction work is not delayed.
Then, after mounting the duct insertion sleeve in the through hole,
By spraying the fire-resistant coating material toward the outer periphery of the steel frame member, it is possible to provide a uniform fire-resistant coating layer around the through holes without exposing the surface of the steel frame member.
【００２５】また、請求項２記載の耐火被覆鉄骨部材の
ダクト挿通用スリーブは、請求項１記載の効果を得るこ
とができるとともに、スペーサの先端部に形成した一対
の爪が貫通孔近くの両側面を挟み込むという単純な構造
により貫通孔内に装着されるので、安価なダクト挿通用
スリーブを提供することができる。Further, the duct insertion sleeve of the fireproof coated steel member according to the second aspect can obtain the effect according to the first aspect, and the pair of claws formed at the tip of the spacer has both sides near the through hole. Since it is mounted in the through hole by a simple structure in which the surfaces are sandwiched, it is possible to provide an inexpensive duct insertion sleeve.
【００２６】しかも、貫通孔の内周面に当接して外側又
は内側に折り曲げられた係合片は、自身の弾性反力によ
り貫通孔の内周面を押圧してスリーブ本体の径方向の移
動を拘束するので、貫通孔内に確実に装着することがで
きる。Moreover, the engaging piece that is in contact with the inner peripheral surface of the through hole and is bent outward or inward presses the inner peripheral surface of the through hole by its own elastic reaction force and moves in the radial direction of the sleeve body. Since it is constrained, it can be securely mounted in the through hole.
【図１】本発明に係る耐火被覆鉄骨梁を示す側面図であ
る。FIG. 1 is a side view showing a fireproof coated steel frame beam according to the present invention.
【図２】図１のII−II線矢視を示す断面図である。2 is a cross-sectional view taken along the line II-II of FIG.
【図３】本発明に係るスペーサを示す斜視図である。FIG. 3 is a perspective view showing a spacer according to the present invention.
【図４】図１の符号Ｂで示す領域を拡大した側面図であ
る。FIG. 4 is an enlarged side view of a region indicated by reference numeral B in FIG.
【図５】図４のV −V 線矢視を示す断面図である。5 is a cross-sectional view taken along the line VV of FIG.
【図６】従来の耐火被覆鉄骨梁を示す側面図である。FIG. 6 is a side view showing a conventional fireproof coated steel beam.
【図７】図６のVII −VII 線矢視を示す断面図である。7 is a cross-sectional view taken along the line VII-VII of FIG.
６ Ｈ形鋼（鉄骨部材） ６ａ ウェブ ８ 耐火被覆層 １０ 空調用ダクト １２ 貫通孔 ２０ ダクト挿通用スリーブ ２４ スリーブ本体 ２６ スペーサ ２８ 接合板部 ３０ 支持板部 ３２ａ、３２ｂ 爪 ３４ 係合片 Ｃ1 、Ｃ2 切れ込み6 H-section steel (steel member) 6a web 8 fireproofing layer 10 air-conditioning duct 12 through holes 20 duct insertion sleeve 24 the sleeve body 26 spacer 28 joint plate portion 30 the support plate portions 32a, 32b pawl 34 engaging piece C 1, C 2 notch
Claims (2)
部材の周囲に所定厚さの耐火被覆層を形成する際に、前
記貫通孔の周囲の耐火被覆層の厚さを均一とするために
前記鉄骨部材に装着するダクト挿通用スリーブであっ
て、 前記ダクトが挿通するスリーブ本体と、このスリーブ本
体の外周の周方向に所定間隔をあけて固定され、前記貫
通孔の縁部との係合により前記スリーブ本体を前記貫通
孔内に保持する複数のスペーサと、を備えたことを特徴
とする耐火被覆鉄骨部材のダクト挿通用スリーブ。1. When forming a refractory coating layer of a predetermined thickness around a steel member having a through hole through which a duct penetrates, in order to make the thickness of the refractory coating layer around the through hole uniform. A duct insertion sleeve mounted on the steel frame member, comprising: a sleeve main body through which the duct is inserted, and an outer peripheral portion of the sleeve main body, which is fixed at a predetermined interval in a circumferential direction and is engaged with an edge portion of the through hole. And a plurality of spacers for holding the sleeve body in the through hole according to the first aspect of the present invention.
周に固定した接合板部と、この接合板の縁部から折れ曲
がって前記スリーブ本体側から外方に向けて突出する支
持板部とを備えた矩形板材とし、前記支持板部の先端部
に先端から基端側に向けて２本の切れ込みを入れること
により、これら２本の切れ込みの外側に一対の爪を形成
し、この一対の爪の間に係合片を形成し且つ当該係合片
を前記一対の爪に対して外側又は内側に僅かに折り曲げ
た形状とし、 前記一対の爪によって前記貫通孔近くの両側面を挟み込
むとともに、前記一対の爪間に位置した前記貫通孔の内
周面に対して、外側又は内側に折り曲がった前記係合片
が弾性反力を作用することを特徴とする請求項１記載の
耐火被覆鉄骨部材のダクト挿通用スリーブ。2. A joint plate portion, in which the spacer is fixed to an outer periphery of the sleeve body, and a support plate portion, which is bent from an edge portion of the joint plate and protrudes outward from the sleeve body side. A rectangular plate material is formed, and two notches are formed in the tip end portion of the support plate portion from the tip end toward the base end side to form a pair of claws on the outside of these two notches, and between the pair of claws. An engaging piece is formed on the engaging piece, and the engaging piece is slightly bent outward or inward with respect to the pair of claws, and both side surfaces near the through hole are sandwiched by the pair of claws. The duct of the fire-resistant coated steel frame member according to claim 1, wherein the engaging piece bent outward or inward acts on an inner peripheral surface of the through hole located between the claws to exert an elastic reaction force. Insertion sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05190796A JP3717991B2 (en) | 1996-03-08 | 1996-03-08 | Sleeve for duct insertion of fire-resistant coated steel members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05190796A JP3717991B2 (en) | 1996-03-08 | 1996-03-08 | Sleeve for duct insertion of fire-resistant coated steel members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09242214A true JPH09242214A (en) | 1997-09-16 |
| JP3717991B2 JP3717991B2 (en) | 2005-11-16 |
Family
ID=12899957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05190796A Expired - Fee Related JP3717991B2 (en) | 1996-03-08 | 1996-03-08 | Sleeve for duct insertion of fire-resistant coated steel members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3717991B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019060173A (en) * | 2017-09-27 | 2019-04-18 | 大和ハウス工業株式会社 | Jig for spraying fireproof covering material, and spraying method for fireproof covering material |
-
1996
- 1996-03-08 JP JP05190796A patent/JP3717991B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019060173A (en) * | 2017-09-27 | 2019-04-18 | 大和ハウス工業株式会社 | Jig for spraying fireproof covering material, and spraying method for fireproof covering material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3717991B2 (en) | 2005-11-16 |
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