JP6975103B2

JP6975103B2 - Repair fittings

Info

Publication number: JP6975103B2
Application number: JP2018123765A
Authority: JP
Inventors: 龍大佐野
Original assignee: Sankyo Tateyama Inc
Current assignee: Sankyo Tateyama Inc
Priority date: 2018-06-28
Filing date: 2018-06-28
Publication date: 2021-12-01
Anticipated expiration: 2038-06-28
Also published as: JP2020002662A

Description

本発明は、建物開口部に残存する既設枠の内周に配置される改修建具に関する。 The present invention relates to a repair fitting arranged on the inner circumference of an existing frame remaining in a building opening.

建物開口部に残存する既設枠の内周に配置される改修建具が公知となっている。 Repair fittings placed on the inner circumference of the existing frame remaining in the opening of the building are known.

特開２００２−２８５７５７号公報Japanese Unexamined Patent Publication No. 2002-285757

上記特許文献１に記載された改修建具は、新設した下枠の室内側部を内部額縁によって覆うことで室内側の見栄えを良くしている。
上記特許文献１に記載された建具においては、新設した下枠のレールの位置が既存の下枠の高さ位置よりも高い位置となっているので、新設下枠のレールが突出することを防止する点から、新設した下枠の室内側部分や新設した下枠の室内側部分を覆う内部額縁に高さを持たせる必要がある。
そのため、既設下枠と新設下枠の室内側部分や内部額縁との間に間隙が形成されてしまい、火災時に、該間隙を通って炎や煙が侵入するなどして、延焼が生じる可能性があった。 In the repair fitting described in Patent Document 1, the indoor side of the newly installed lower frame is covered with an internal frame to improve the appearance of the indoor side.
In the fitting described in Patent Document 1, the position of the rail of the newly installed lower frame is higher than the height position of the existing lower frame, so that the rail of the newly installed lower frame is prevented from protruding. From this point of view, it is necessary to give a height to the inner frame that covers the indoor side part of the newly installed lower frame and the indoor side part of the newly installed lower frame.
Therefore, a gap is formed between the existing lower frame and the indoor side part of the new lower frame or the internal frame, and in the event of a fire, flame or smoke may invade through the gap and spread the fire. was there.

本発明は、上記の事情を鑑み、改修建具の強度を向上するとともに、改修下枠の室内側部に生じる間隙からの延焼を抑制し、防火性能を向上させることを目的とする。 In view of the above circumstances, it is an object of the present invention to improve the strength of the repair fitting, suppress the spread of fire from the gap generated in the indoor side of the repair lower frame, and improve the fire protection performance.

本発明の一実施形態は、躯体開口部に残存する既設下枠に装着される新設下枠と、新設下枠の室内側を覆う内部カバーを備え、新設下枠は、室内側壁部と、室内側壁部から室内側に延設される室内側上壁部を有しており、内部カバーは、新設下枠の室内側上壁部の上面を覆う天板部を有し、天板部の室外側端部に形成された係合部が新設下枠の室内側上壁部の上方位置で室内側壁部に係合されているとともに、新設下枠の室内側の躯体開口部に固定されており、新設下枠は、室内側壁部の室内側面に、加熱により新設下枠と躯体開口部の間の間隙に向かって膨張する加熱膨張材が配置されている改修建具である。 One embodiment of the present invention includes a new lower frame attached to an existing lower frame remaining in the opening of the skeleton and an internal cover that covers the indoor side of the new lower frame. It has an indoor side upper wall portion extending from the side wall portion to the indoor side, and the inner cover has a top plate portion covering the upper surface of the indoor side upper wall portion of the newly installed lower frame, and the room of the top plate portion. The engaging portion formed at the outer end is engaged with the indoor side wall at a position above the indoor upper wall of the new lower frame, and is fixed to the indoor skeleton opening of the new lower frame. The new lower frame is a refurbished fitting in which a heat-expanding material that expands toward the gap between the new lower frame and the opening of the skeleton by heating is arranged on the indoor side surface of the indoor side wall portion.

本発明の防火建具の構成により、改修建具の強度を向上することができ、防火性能を向上させることができる。 With the configuration of the fire protection fitting of the present invention, the strength of the repair fitting can be improved, and the fire protection performance can be improved.

本発明の一実施形態に係る改修建具の竪断面図である。It is a vertical sectional view of the repair fitting which concerns on one Embodiment of this invention. 本発明の一実施形態に係る改修建具の横断面図である。It is sectional drawing of the repair fitting which concerns on one Embodiment of this invention. （ａ）は、本発明の一実施形態に係る改修建具の下枠部分の竪断面図であり、（ｂ）は、その一部拡大図である。(A) is a vertical sectional view of a lower frame portion of a repair fitting according to an embodiment of the present invention, and (b) is a partially enlarged view thereof. 本発明の他の実施形態に係る改修建具の竪断面図である。It is a vertical sectional view of the repair fitting which concerns on other embodiment of this invention. 本発明の他の実施形態に係る改修建具の横断面図である。It is sectional drawing of the repair fitting which concerns on other embodiment of this invention. （ａ）は、本発明の他の実施形態に係る改修建具の下枠部分の竪断面図であり、（ｂ）は、その一部拡大図である。(A) is a vertical sectional view of a lower frame portion of a repair fitting according to another embodiment of the present invention, and (b) is a partially enlarged view thereof. 本発明の実施形態に係る改修建具の上枠と竪枠との連結部分のシールを説明するための斜視図である。It is a perspective view for demonstrating the seal of the connecting part between the upper frame and the vertical frame of the repair fitting which concerns on embodiment of this invention. 本発明の実施形態に係る改修建具の下枠と竪枠との連結部分のシールを説明するための斜視図である。It is a perspective view for demonstrating the seal of the connecting part between the lower frame and the vertical frame of the repair fitting which concerns on embodiment of this invention.

−第１の実施形態―
本発明の第１の実施形態の改修建具として、図１ないし３に示すように、既設の引違い建具の既設枠１の内周に、新設枠２を装着してなる改修建具を用いて説明する。 -First embodiment-
As a repair fitting according to the first embodiment of the present invention, as shown in FIGS. do.

（全体の構成）
本実施形態の改修建具は、図１、図２に示すように、既設上枠１１，既設下枠１２，既設竪枠１３，１３からなる既設枠１を除去せずに、既設枠１の内周に新設上枠２１，新設下枠２２，新設竪枠２３，２３からなる新設枠２が配置されている。
なお、本実施形態の改修建具は、左右の竪枠部分についてその主たる構成がほとんど同様であるので、竪枠部分についての説明を右竪枠を用いて行う。 (Overall composition)
As shown in FIGS. 1 and 2, the repair fitting of the present embodiment has the existing frame 1 including the existing upper frame 11, the existing lower frame 12, and the existing vertical frames 13 and 13 without removing the existing frame 1. A new frame 2 composed of a new upper frame 21, a new lower frame 22, and a new vertical frame 23, 23 is arranged around the circumference.
Since the main configurations of the repair fittings of the present embodiment are almost the same for the left and right vertical frame portions, the explanation of the vertical frame portions will be given using the right vertical frame portion.

既設枠１を構成する既設上枠１１，既設下枠１２，既設竪枠１３のそれぞれには上取付補助材３１、下取付補助材３２及び竪取付補助材３３が固定されており、新設枠２は各取付補助材を介して既設枠１に装着されている。
なお、既設枠１は、その全ての部分が除去されずに残存させた状態で取付補助材及び新設枠を装着しても良いが、例えば図１に示す既設下枠１２の室外側下レールが切除されているように、必要に応じて新設枠２を配置するに際して邪魔となる部位が除去されていてもよい。 An upper mounting auxiliary material 31, a lower mounting auxiliary material 32, and a vertical mounting auxiliary material 33 are fixed to each of the existing upper frame 11, the existing lower frame 12, and the existing vertical frame 13 constituting the existing frame 1, and the new frame 2 Is mounted on the existing frame 1 via each mounting auxiliary material.
The existing frame 1 may be equipped with the mounting auxiliary material and the new frame in a state where all the parts thereof remain without being removed. For example, the outdoor lower rail of the existing lower frame 12 shown in FIG. 1 may be attached. As necessary, a portion that interferes with the placement of the new frame 2 may be removed as if it had been excised.

（上枠部分の構成）
既設上枠１１に固定される上取付補助材３１は、見込寸法が既設上枠１１の見込寸法とほぼ同程度の寸法を有し新設上枠２１の長手方向に延びる長尺部材からなる。上取付補助材３１は、新設上枠２１を装着する際の基準となる見込壁部３１ａと、見込壁部３１ａの室内外両端付近より外周方向に延設される室内側固定部３１ｂ及び室外側固定部３１ｃを有している。 (Structure of upper frame part)
The upper mounting auxiliary material 31 fixed to the existing upper frame 11 is composed of a long member having an estimated dimension of substantially the same as the expected dimension of the existing upper frame 11 and extending in the longitudinal direction of the new upper frame 21. The upper mounting auxiliary material 31 includes a prospective wall portion 31a as a reference when mounting the new upper frame 21, an indoor side fixing portion 31b extending in the outer peripheral direction from the vicinity of both indoor and outdoor ends of the prospective wall portion 31a, and an outdoor side. It has a fixed portion 31c.

そして、見込壁部３１ａが水平となるように見込壁部３１ａの外周側面を既設上枠１１の室内側壁部１１ａ、室外側壁部１１ｂの下端に当接させた状態で、室内側固定部３１ｂ及び室外側固定部３１ｃが既設上枠１１の室内側壁部１１ａの室外側と室外側壁部１１ｂの室内側との間に挿入され、室内側固定部３１ｂが室内側壁部１１ａにビス等の固定手段ｂにより固定され、室外側固定部３１ｃが室外側壁部１１ｂにビス等の固定手段ｂにより固定されている。 Then, in a state where the outer peripheral side surface of the prospective wall portion 31a is in contact with the indoor side wall portion 11a of the existing upper frame 11 and the lower ends of the outdoor wall portion 11b so that the prospective wall portion 31a is horizontal, the indoor side fixing portion 31b and The outdoor side fixing portion 31c is inserted between the outdoor side of the indoor side wall portion 11a of the existing upper frame 11 and the indoor side of the outdoor side wall portion 11b, and the indoor side fixing portion 31b is fixed to the indoor side wall portion 11a by fixing means such as screws b. The outdoor fixing portion 31c is fixed to the outdoor wall portion 11b by a fixing means b such as a screw.

新設上枠２１は、既設上枠１１よりも見込寸法が大きく形成されており、見込み方向室内側上面に加熱により膨張する加熱膨張材ｆが配置されるとともに、見込み方向の略中央付近において、スペーサー６１を介してビス等の固定手段ｂにより上取付補助材３１の見込壁部３１ａに固定されている。新設上枠２１の室内側下面には、後述する内部カバー７１を取り付けるための挿入部２１ａを有している。 The new upper frame 21 is formed to have a larger expected dimension than the existing upper frame 11, and a heating expansion material f that expands by heating is arranged on the upper surface on the indoor side in the prospective direction, and a spacer is provided near the substantially center in the prospective direction. It is fixed to the prospective wall portion 31a of the upper mounting auxiliary material 31 by a fixing means b such as a screw via 61. An insertion portion 21a for attaching an internal cover 71, which will be described later, is provided on the lower surface of the new upper frame 21 on the indoor side.

新設上枠２１は、室外側外周に気密材ｓを有しており、上取付補助材３１を介して既設上枠１１に固定された新設上枠２１の気密材ｓが既設上枠１１の室外側内周に当接して、既設上枠１１と新設上枠２１との室外側における気密を行っている。 The new upper frame 21 has an airtight material s on the outer periphery of the outdoor side, and the airtight material s of the new upper frame 21 fixed to the existing upper frame 11 via the upper mounting auxiliary material 31 is a chamber of the existing upper frame 11. The existing upper frame 11 and the new upper frame 21 are airtight on the outdoor side by abutting on the outer inner circumference.

また、新設上枠２１の室内側から既設上枠１１の室内側を覆うように、防水シート８１が設けられるとともに、防水シート８１を覆うようにアルミニウム合金等の金属製の内部カバー７１が配置されている。 Further, a waterproof sheet 81 is provided so as to cover the indoor side of the existing upper frame 11 from the indoor side of the new upper frame 21, and a metal inner cover 71 such as an aluminum alloy is arranged so as to cover the waterproof sheet 81. ing.

金属製の内部カバー７１は、防水シート８１を覆うカバー部７１ａと、新設上枠２１の挿入部２１ａに挿入される脚部７１ｂと、カバー部７１ａの上端に連続する固定部７１ｃとを有している。
そして、内部カバー７１は、脚部７１ｂが新設上枠２１の挿入部２１ａに上下動自在に挿入された状態で、固定部７１ｃがビス等の固定手段ｂにより躯体開口部に固定されて配置されている。 The metal inner cover 71 has a cover portion 71a that covers the waterproof sheet 81, a leg portion 71b that is inserted into the insertion portion 21a of the new upper frame 21, and a fixing portion 71c that is continuous with the upper end of the cover portion 71a. ing.
The internal cover 71 is arranged so that the fixed portion 71c is fixed to the skeleton opening by a fixing means b such as a screw while the leg portion 71b is vertically and vertically inserted into the insertion portion 21a of the new upper frame 21. ing.

（下枠部分の構成）
既設下枠１２に固定される下取付補助材３２は、室内側取付補助材３２１と室外側取付補助材３２２の二つの部材からなる。
室内側取付補助材３２１は、アルミニウム合金等の金属材料からなり、新設下枠２２の室内側の荷重を支持する支持部３２１ａと、支持部３２１ａの室内側に連続する取付壁３２１ｂと、を有し、取付壁３２１ｂが既設下枠１２の室内側の壁面にビス等の固定手段ｂにより固定されている。また、室内側取付補助材３２１の支持部３２１ａは、既設下枠１２の室内側下レールに固定された荷重支持部材３２３にスペーサー６２を介して支持されている。 (Structure of lower frame part)
The lower mounting auxiliary material 32 fixed to the existing lower frame 12 is composed of two members, the indoor side mounting auxiliary material 321 and the outdoor side mounting auxiliary material 322.
The indoor side mounting auxiliary material 321 is made of a metal material such as an aluminum alloy, and has a support portion 321a that supports the load on the indoor side of the newly installed lower frame 22, and a mounting wall 321b that is continuous to the indoor side of the support portion 321a. The mounting wall 321b is fixed to the wall surface of the existing lower frame 12 on the indoor side by a fixing means b such as a screw. Further, the support portion 321a of the indoor side mounting auxiliary material 321 is supported by the load support member 323 fixed to the indoor side lower rail of the existing lower frame 12 via the spacer 62.

室外側取付補助材３２２は、新設下枠２２の室外側の荷重を支持する支持部３２２ａ及び新設下枠２２の室外側端部の浮き上がりを防止する浮き上がり防止部３２２ｂを有し、支持部３２２ａがスペーサー６３を介して既設下枠１２に載置された状態で既設下枠１２の前壁部にビス等の固定手段ｂにより固定されている。 The outdoor mounting auxiliary material 322 has a support portion 322a that supports the load on the outdoor side of the new lower frame 22, and a lift prevention portion 322b that prevents the outdoor end of the new lower frame 22 from lifting, and the support portion 322a has a support portion 322a. It is fixed to the front wall portion of the existing lower frame 12 by a fixing means b such as a screw while being placed on the existing lower frame 12 via the spacer 63.

新設下枠２２は、既設下枠１２よりも見込寸法が大きく形成されており、見込み方向の室内側が室内側取付補助材３２１の支持部３２１ａに支持され、ビス等の固定手段ｂにより室内側取付補助材３２１の支持部３２１ａに固定されている。
また、新設下枠２２は、室外側下端に室内側に屈曲して延びる浮き上がり防止片２２ｇを有しており、新設下枠２２を既設下枠１２に装着した状態で浮き上がり防止片２２ｇが室外側取付補助材３２２の浮き上がり防止部３２２ｂの下方に位置している。そして、必要に応じて、新設下枠２２の室外側が室外側取付補助材３２２の浮き上がり防止部３２２ｂに対して、ビス止め固定されている。 The new lower frame 22 has a larger expected dimension than the existing lower frame 12, and the indoor side in the prospective direction is supported by the support portion 321a of the indoor side mounting auxiliary material 321 and is mounted on the indoor side by a fixing means b such as a screw or the like. It is fixed to the support portion 321a of the auxiliary material 321.
Further, the new lower frame 22 has a floating prevention piece 22g that bends and extends toward the indoor side at the lower end of the outdoor side, and the floating prevention piece 22g is attached to the existing lower frame 12 with the new lower frame 22 attached to the outdoor side. It is located below the lift prevention portion 322b of the mounting auxiliary material 322. Then, if necessary, the outdoor side of the newly installed lower frame 22 is fixed with screws to the floating prevention portion 322b of the outdoor side mounting auxiliary material 322.

新設下枠２２の室内側から既設下枠１２の室内側を覆うように防水シート８２が設けられており、防水シート８２を覆うようにアルミニウム合金等の金属製の内部カバー７２が配置されている。 A waterproof sheet 82 is provided so as to cover the indoor side of the existing lower frame 12 from the indoor side of the new lower frame 22, and a metal inner cover 72 such as an aluminum alloy is arranged so as to cover the waterproof sheet 82. ..

（竪枠部分の構成）
既設竪枠１３に固定される竪取付補助材３３は、見込寸法が既設竪枠１３の見込寸法とほぼ同程度の見込寸法を有し新設竪枠２３の長手方向に延びる長尺部材からなる。竪取付補助材３３は、新設竪枠２３を装着する際の基準となる見込壁部３３ａと、見込壁部３３ａの室内外両端付近より外周方向に延設される室内側固定部３３ｂ及び室外側固定部３３ｃを有している。 (Structure of vertical frame part)
The vertical mounting auxiliary material 33 fixed to the existing vertical frame 13 is a long member having an estimated dimension approximately the same as the expected dimension of the existing vertical frame 13 and extending in the longitudinal direction of the new vertical frame 23. The vertical mounting auxiliary material 33 includes a prospective wall portion 33a as a reference when mounting the new vertical frame 23, an indoor side fixing portion 33b extending in the outer peripheral direction from the vicinity of both indoor and outdoor ends of the prospective wall portion 33a, and an outdoor side. It has a fixed portion 33c.

そして、竪取付補助材３３は、室内側固定部３３ｂ及び室外側固定部３３ｃが既設竪枠１３の室内側壁部１３ａの室外側と室外側壁部１３ｂの室内側との間に挿入されることで、見込壁部３３ａが内周に向く垂直面となるように配置され、室内側固定部３３ｂが室内側壁部１３ａにビス等の固定手段ｂにより固定され、室外側固定部３３ｃが室外側壁部１３ｂにビス等の固定手段ｂにより固定されている。 Then, in the vertical mounting auxiliary material 33, the indoor side fixing portion 33b and the outdoor side fixing portion 33c are inserted between the outdoor side of the indoor side wall portion 13a of the existing vertical frame 13 and the indoor side of the outdoor side wall portion 13b. The prospective wall portion 33a is arranged so as to be a vertical surface facing the inner circumference, the indoor side fixing portion 33b is fixed to the indoor side wall portion 13a by a fixing means b such as a screw, and the outdoor side fixing portion 33c is the outdoor side wall portion 13b. It is fixed to the door by a fixing means b such as a screw.

新設竪枠２３は、既設竪枠１３よりも見込寸法が大きく形成されており、見込み方向室内側外周面に加熱により膨張する加熱膨張材ｆが配置されるとともに、見込み方向の略中央付近において、スペーサー６４を介してビス等の固定手段ｂにより竪取付補助材３３の見込壁部３３ａに固定されている。新設竪枠２３の室内側内周面には、後述する内部カバー７３を取り付けるための挿入部２３ａを有している。 The new vertical frame 23 is formed to have a larger expected dimension than the existing vertical frame 13, and a heating expansion material f that expands by heating is arranged on the outer peripheral surface on the indoor side in the prospective direction, and in the vicinity of substantially the center in the prospective direction. It is fixed to the prospective wall portion 33a of the vertical mounting auxiliary material 33 by a fixing means b such as a screw via a spacer 64. An insertion portion 23a for attaching an inner cover 73, which will be described later, is provided on the inner peripheral surface of the new vertical frame 23 on the indoor side.

新設竪枠２３は、室外側外周に気密材ｓを有しており、竪取付補助材３３を介して既設竪枠１３に固定された新設竪枠２３の気密材ｓが既設竪枠１３の室外側内周に当接して、既設竪枠１３と新設竪枠２３との室外側における気密を行っている。
また、新設竪枠２３の室内側及び既設竪枠１３の室内側を覆うように防水シート８３が設けられており、防水シート８３を覆うようにアルミニウム合金等の金属製の内部カバー７３が配置され、ビス等の固定手段ｂによって躯体開口部に固定されている。 The new vertical frame 23 has an airtight material s on the outer periphery of the outdoor side, and the airtight material s of the new vertical frame 23 fixed to the existing vertical frame 13 via the vertical mounting auxiliary material 33 is the chamber of the existing vertical frame 13. The existing vertical frame 13 and the new vertical frame 23 are airtight on the outdoor side by abutting on the outer inner circumference.
Further, a waterproof sheet 83 is provided so as to cover the indoor side of the new vertical frame 23 and the indoor side of the existing vertical frame 13, and a metal inner cover 73 such as an aluminum alloy is arranged so as to cover the waterproof sheet 83. , Is fixed to the skeleton opening by a fixing means b such as a screw.

金属製の内部カバー７３は、防水シート８３を覆うカバー部７３ａと、新設竪枠２３の挿入部２３ａに内周方向から挿入される脚部７３ｂと、カバー部７３ａの外周側端に連続する固定部７３ｃとを有している。そして、内部カバー７３は、脚部７３ｂを新設竪枠２３の挿入部２３ａに左右移動自在に挿入した状態で、固定部７３ｃがビス等の固定手段ｂにより躯体開口部に固定されて配置されている。 The metal inner cover 73 is continuously fixed to the cover portion 73a that covers the waterproof sheet 83, the leg portion 73b that is inserted into the insertion portion 23a of the new vertical frame 23 from the inner peripheral direction, and the outer peripheral side end of the cover portion 73a. It has a portion 73c. The internal cover 73 is arranged with the leg portion 73b inserted into the insertion portion 23a of the new vertical frame 23 so as to be movable left and right, and the fixing portion 73c is fixed to the skeleton opening by a fixing means b such as a screw. There is.

ここで、新設枠２および既設枠１の室内側を覆うように配置される防水シートについて、図７，８を参考にして説明する。
図７に示すように、既設上枠１１の室内側壁部１１ａと新設上枠２１の室内側との間には、隙間ｄ１（スペーサー６１が配置されている。）が存在するが、該隙間ｄ１を覆うように、防水シート８１が設けられている。 Here, the waterproof sheet arranged so as to cover the indoor side of the new frame 2 and the existing frame 1 will be described with reference to FIGS. 7 and 8.
As shown in FIG. 7, there is a gap d1 (a spacer 61 is arranged) between the indoor side wall portion 11a of the existing upper frame 11 and the indoor side of the new upper frame 21, but the gap d1 A waterproof sheet 81 is provided so as to cover the surface.

また、既設竪枠１３の室内側壁部１３ａと新設竪枠２３の室内側との間には、隙間ｄ３（スペーサー６３が配置されている。）が存在するが、該隙間ｄ３を覆うように、防水シート８３が設けられている。
そして、枠の上コーナー部において、上枠に配置された防水シート８１と、竪枠に配置された防水シート８３を連続させるように、防水シート８４及び防水シート８５が設けられている。 Further, although there is a gap d3 (a spacer 63 is arranged) between the indoor side wall portion 13a of the existing vertical frame 13 and the indoor side of the new vertical frame 23, the gap d3 is covered so as to cover the gap d3. A waterproof sheet 83 is provided.
At the upper corner of the frame, the waterproof sheet 84 and the waterproof sheet 85 are provided so as to make the waterproof sheet 81 arranged on the upper frame and the waterproof sheet 83 arranged on the vertical frame continuous.

一方、図８に示すように、既設下枠１２の室内側壁部１２ａと新設下枠２２の室内側との間には、隙間ｄ２が存在するが、該隙間ｄ２を覆うように、防水シート８２が設けられている。 On the other hand, as shown in FIG. 8, there is a gap d2 between the indoor side wall portion 12a of the existing lower frame 12 and the indoor side of the new lower frame 22, but the waterproof sheet 82 covers the gap d2. Is provided.

また、既設竪枠１３の室内側壁部１３ａと新設竪枠２３の室内側との間には、隙間ｄ３（スペーサー６３が配置されている。）が存在するが、該隙間ｄ３を覆うように、防水シート８３が設けられている。
そして、枠の下コーナー部において、下枠に配置された防水シート８２と、竪枠に配置された防水シート８３を連続させるように、防水シート８６が設けられている。 Further, although there is a gap d3 (a spacer 63 is arranged) between the indoor side wall portion 13a of the existing vertical frame 13 and the indoor side of the new vertical frame 23, the gap d3 is covered so as to cover the gap d3. A waterproof sheet 83 is provided.
Then, at the lower corner of the frame, the waterproof sheet 86 is provided so as to make the waterproof sheet 82 arranged in the lower frame and the waterproof sheet 83 arranged in the vertical frame continuous.

（第１の実施形態の下枠室内側部分の構成）
以上のように、本実施形態の改修建具は、新設下枠２２の室内側が室内側取付補助材３２１を介して既設下枠１２に支持されているが、既設下枠１２に対して新設下枠２２の室内側レールを高い位置に配置していることから、火災時等に内、外障子が室外側に反るように変形した際に、新設下枠２２が室外側に転んでしまい、内、外障子が外れてしまう危険性があった。 (Structure of the lower frame indoor side portion of the first embodiment)
As described above, in the modified fitting of the present embodiment, the indoor side of the new lower frame 22 is supported by the existing lower frame 12 via the indoor side mounting auxiliary material 321. However, the new lower frame 12 is supported with respect to the existing lower frame 12. Since the indoor side rail of 22 is arranged at a high position, the newly installed lower frame 22 falls to the outdoor side when the internal and external shoji are deformed so as to warp to the outdoor side in the event of a fire or the like. , There was a risk that the shoji would come off.

また、新設下枠２２の室内側レールを高い位置に設定することにより、室内側レールに高さを合わせて形成された新設下枠２２の室内側部分を覆う内部カバー７２の高さ寸法も高く設定されることとなり、新設下枠２２及び内部カバー７２の下面に隙間ｄ２が生じることとなった。そのため、内部カバー７２の室内側端部が火災時の熱等により溶融することで、火災の比較的早い段階で建具の室内外が連通してしまう可能性があった。 Further, by setting the indoor side rail of the new lower frame 22 to a high position, the height dimension of the inner cover 72 that covers the indoor side portion of the new lower frame 22 formed by matching the height with the indoor side rail is also high. As a result, a gap d2 is created on the lower surfaces of the newly installed lower frame 22 and the inner cover 72. Therefore, there is a possibility that the indoor and outdoor ends of the fittings may communicate with each other at a relatively early stage of the fire because the indoor end of the inner cover 72 melts due to heat or the like at the time of a fire.

以下、本発明の一実施形態の改修建具における、火災時の変形による新設下枠２２の転びを防止すると共に、新設下枠２２の室内側部分における室内外の連通を抑制するための構成について、さらに詳細に説明する。 Hereinafter, in the repair fitting according to the embodiment of the present invention, the configuration for preventing the new lower frame 22 from falling due to deformation at the time of fire and suppressing the indoor / outdoor communication in the indoor side portion of the new lower frame 22 will be described. This will be described in more detail.

既設下枠１２に取り付けられる新設下枠２２は、図３（ａ）に示すように、室内側見込壁を構成する室内側底壁部２２ａと、室外側見込壁を構成する室外側底壁部２２ｂと、室内側底壁部２２ａの室内側から立ち上がる室内側壁部２２ｃと、室内側壁部２２ｃの上端よりもやや下方位置の室内側面から室内側に延設される室内側上壁部２２ｄと、室内側底壁部２２ａと室外側底壁部２２ｂとを連続する立壁部２２ｅと、室外側底壁部２２ｂの室外側端から下方に向かって延設される前壁部２２ｆと、前壁部２２ｆの下端から室内側に屈曲して延設される浮き上がり防止片２２ｇと、室内側底壁部２２ａの室外側上面に立設される室内下レール２２ｈと、室外側底壁部２２ｂの上面に立設される室外下レール２２ｉと、室内側底壁部２２ａの室外側に延設される気密材保持片２２ｊを有している。 As shown in FIG. 3A, the new lower frame 22 attached to the existing lower frame 12 has an indoor bottom wall portion 22a constituting the indoor side prospective wall and an outdoor side bottom wall portion constituting the outdoor side prospective wall. 22b, an indoor side wall portion 22c rising from the indoor side of the indoor side bottom wall portion 22a, and an indoor side upper wall portion 22d extending from the indoor side surface slightly below the upper end of the indoor side wall portion 22c to the indoor side. A vertical wall portion 22e that connects the indoor side bottom wall portion 22a and the outdoor side bottom wall portion 22b, a front wall portion 22f extending downward from the outdoor side end of the outdoor side bottom wall portion 22b, and a front wall portion. On the floating prevention piece 22g that bends and extends from the lower end of the 22f to the indoor side, the indoor lower rail 22h that stands on the outdoor upper surface of the indoor bottom wall 22a, and the upper surface of the outdoor bottom wall 22b. It has an outdoor lower rail 22i to be erected and an airtight material holding piece 22j extending to the outdoor side of the indoor bottom wall portion 22a.

また、新設下枠２２は、図３（ｂ）に示すように、室内側壁部２２ｃの室内側上壁部２２ｄよりも上方部位に内部カバー７２の室外側を係合する被係合部２２ｋが形成されており、室内側上壁部２２ｄの上面には、後述する内部カバー７２の天板部７２ａを支持するリブが長手方向に沿って形成されている。 Further, as shown in FIG. 3B, the newly installed lower frame 22 has an engaged portion 22k that engages the outdoor side of the inner cover 72 with a portion above the indoor side upper wall portion 22d of the indoor side wall portion 22c. A rib that supports the top plate portion 72a of the inner cover 72, which will be described later, is formed along the longitudinal direction on the upper surface of the indoor side upper wall portion 22d.

さらに、新設下枠２２は、図３（ａ），（ｂ）に示すように、室内側壁部２２ｃの室内側面であって被係合部２２ｋよりも下方位置と、室内側壁部２２ｃの室外側面と、立壁部２２ｅの室外側面に加熱膨張材ｆを保持する膨張材ホルダー２２ｍ，２２ｎ，２２ｓが形成されており、各膨張材ホルダー２２ｍ，２２ｎ，２２ｓに加熱により膨張する加熱膨張材ｆが配置されている。 Further, as shown in FIGS. 3A and 3B, the newly installed lower frame 22 is an indoor side surface of the indoor side wall portion 22c at a position below the engaged portion 22k and an outdoor side surface of the indoor side wall portion 22c. The expansion material holders 22m, 22n, 22s for holding the heating expansion material f are formed on the outdoor surface of the vertical wall portion 22e, and the heating expansion material f that expands by heating is arranged in each expansion material holder 22m, 22n, 22s. Has been done.

そして、新設下枠２２は、室内側底壁部２２ａの下面の内外２か所に形成された脚部を室内側取付補助材３２１の支持部３２１ａに載置した状態で、ビス等の固定手段ｂにより室内側取付補助材３２１に固定することで、既設下枠１２に取付けられている。なお、このとき室外側底壁部２２ｂを室外側取付補助材３２２に載置するようにしてもよい。 Then, the newly installed lower frame 22 is a fixing means such as a screw in a state where the legs formed at two places inside and outside the lower surface of the indoor side bottom wall portion 22a are placed on the support portion 321a of the indoor side mounting auxiliary material 321. It is attached to the existing lower frame 12 by being fixed to the indoor side mounting auxiliary material 321 by b. At this time, the outdoor bottom wall portion 22b may be placed on the outdoor mounting auxiliary material 322.

既設下枠１２に取付けられた新設下枠２２の上端、例えば室内下レール２２ｈもしくは室内側壁部２２ｃの上端は、既設下枠１２もしくは躯体開口部の上端よりも所定寸法高く設定されている。
そして、新設下枠２２の室内側壁部２２ｃから室内側に延設される室内側上壁部２２ｄと躯体開口部の上端との間には隙間ｄ２が形成され、室内側上壁部２２ｄの上面から躯体開口部にかけて、間隙を塞ぐように防水シート８２が配置されている。 The upper end of the new lower frame 22 attached to the existing lower frame 12, for example, the upper end of the indoor lower rail 22h or the indoor side wall portion 22c is set higher than the upper end of the existing lower frame 12 or the skeleton opening by a predetermined dimension.
A gap d2 is formed between the indoor side upper wall portion 22d extending from the indoor side wall portion 22c of the new lower frame 22 to the indoor side upper wall portion 22d and the upper end of the skeleton opening, and the upper surface of the indoor side upper wall portion 22d is formed. A waterproof sheet 82 is arranged from the to the opening of the skeleton so as to close the gap.

新設下枠２２の室内側を覆う内部カバー７２は、室内側上壁部２２ｄ及び躯体開口部の上面を覆う天板部７２ａと、天板部７２ａの室内側に連続する室内壁部７２ｂを有する長尺部材からなり、天板部７２ａの室外側端部に下方に突出する係合凸部７２ｃが形成されている。
また、天板部７２ａの室内側下面には、長手方向に沿って複数のリブ状の脚部７２ｄ，７２ｄが形成されている。 The inner cover 72 that covers the indoor side of the new lower frame 22 has a top plate portion 72a that covers the indoor side upper wall portion 22d and the upper surface of the skeleton opening, and an indoor wall portion 72b that is continuous with the indoor side of the top plate portion 72a. It is made of a long member, and an engaging convex portion 72c protruding downward is formed at the outdoor end of the top plate portion 72a.
Further, on the lower surface of the top plate portion 72a on the indoor side, a plurality of rib-shaped leg portions 72d and 72d are formed along the longitudinal direction.

そして、内部カバー７２は、室外側に形成された係合凸部７２ｃを新設下枠２２の被係合部２２ｋに係合すると共に、室内側に形成された複数のリブ状の脚部７２ｄ，７２ｄを躯体開口部に載置した状態で、ビス等の固定手段ｂにより、既設下枠１２に固定されている。
新設下枠２２及び躯体開口部に固定された内部カバー７２の天板部７２ａの上面は、新設下枠２２の室内側壁部２２ｃの上端とほぼ同じ高さであり、室内側壁部２２ｃの室内側おいて、室内側上壁部２２ｄの上面から躯体開口部にかけて配置された防水シート８２、すなわち室内側上壁部２２ｄと躯体開口部との隙間ｄ２を覆うように配置されている。 Then, the inner cover 72 engages the engaging convex portion 72c formed on the outdoor side with the engaged portion 22k of the newly installed lower frame 22, and the plurality of rib-shaped leg portions 72d formed on the indoor side. With the 72d placed on the skeleton opening, it is fixed to the existing lower frame 12 by a fixing means b such as a screw.
The upper surface of the top plate portion 72a of the inner cover 72 fixed to the new lower frame 22 and the skeleton opening is substantially the same height as the upper end of the indoor side wall portion 22c of the new lower frame 22, and is the indoor side of the indoor side wall portion 22c. The waterproof sheet 82 arranged from the upper surface of the indoor side upper wall portion 22d to the skeleton opening, that is, the waterproof sheet 82 is arranged so as to cover the gap d2 between the indoor side upper wall portion 22d and the skeleton opening.

以上の第１の実施形態においては、新設下枠２２の室内側を覆う内部カバー７２が、躯体開口部にビス止め固定されているとともに、新設下枠２２の室内側壁部２２ｃの上方位置に係合しているので、火災時のおける建具の変形による新設下枠２２の倒れを抑制することができ、強度の向上を図ることができる。 In the above first embodiment, the inner cover 72 that covers the indoor side of the new lower frame 22 is fixed to the opening of the skeleton with screws and is engaged with the upper position of the indoor side wall portion 22c of the new lower frame 22. Therefore, it is possible to prevent the newly installed lower frame 22 from collapsing due to deformation of the fittings in the event of a fire, and it is possible to improve the strength.

また、内部カバー７２により、比較的高い位置にある室内側上壁部２２ｄの上面と躯体開口部の上面を覆うことで、高さ位置の異なる新設下枠２２と躯体開口部との間に生じる隙間ｄ２を塞ぐとともに、新設下枠２２の室内側壁部２２ｃの室内側面であって被係合部２２ｋの下方位置に加熱膨張材ｆを配置しているので、既設下枠１２の形状に関係なく、火災時には加熱膨張材ｆが室内方向に向かって膨張し、新設下枠２２，内部カバー７２と、躯体開口部との間の隙間に充満するので、内部カバー７２が溶融することによる室内外の連通を抑制することができる。 Further, by covering the upper surface of the indoor side upper wall portion 22d and the upper surface of the skeleton opening at a relatively high position with the inner cover 72, it is generated between the new lower frame 22 having different height positions and the skeleton opening. Since the gap d2 is closed and the heat expansion material f is arranged on the indoor side surface of the indoor side wall portion 22c of the new lower frame 22 at a position below the engaged portion 22k, the heat expansion material f is arranged regardless of the shape of the existing lower frame 12. In the event of a fire, the heat expansion material f expands toward the room and fills the gap between the newly installed lower frame 22, the inner cover 72 and the skeleton opening, so that the inner cover 72 melts inside and outside the room. Communication can be suppressed.

−第２の実施形態―
次に、本発明の第２の実施形態の改修建具について、図４ないし６を参考にして説明する。なお、第２の実施形態の改修建具は、内部カバーが樹脂材料により形成されている点で、第１の実施形態の改修建具と異なっている。以下の説明においては、主に、第１の実施形態と異なる点について説明し、同様の構成については説明を省略する。 -Second embodiment-
Next, the repair fitting of the second embodiment of the present invention will be described with reference to FIGS. 4 to 6. The repair fitting of the second embodiment is different from the repair fitting of the first embodiment in that the inner cover is made of a resin material. In the following description, mainly the points different from the first embodiment will be described, and the description of the same configuration will be omitted.

（上枠部分の構成）
本実施形態の改修建具においては、図４に示すように、新設上枠２１の室内側から既設上枠１１の室内側を覆うように、防水シート８１が設けられるとともに、防水シート８１の室内側には、断面略Ｌ字状の金属製の上補強部材９１が配置されている。
そして、上取付補助材３１の室内側固定部３１ｂは、室内側壁部１１ａ及び上補強部材９１に対してビス等の固定手段ｂにより固定されている。 (Structure of upper frame part)
In the repair fitting of the present embodiment, as shown in FIG. 4, a waterproof sheet 81 is provided so as to cover the indoor side of the existing upper frame 11 from the indoor side of the new upper frame 21, and the indoor side of the waterproof sheet 81 is provided. A metal upper reinforcing member 91 having a substantially L-shaped cross section is arranged therein.
The indoor side fixing portion 31b of the upper mounting auxiliary member 31 is fixed to the indoor side wall portion 11a and the upper reinforcing member 91 by a fixing means b such as a screw.

樹脂製の内部カバー７１は、防水シート８１及び上補強部材９１を覆うカバー部７１ａと、新設上枠２１の挿入部２１ａに挿入される脚部７１ｂと、カバー部７１ａの上端に連続する固定部７１ｃとを有しており、脚部７１ｂを新設上枠２１の挿入部２１ａに上下動自在に挿入した状態で、固定部７１ｃがビス等の固定手段ｂにより躯体開口部に固定されて配置されている。 The resin inner cover 71 includes a cover portion 71a that covers the waterproof sheet 81 and the upper reinforcing member 91, a leg portion 71b that is inserted into the insertion portion 21a of the new upper frame 21, and a fixing portion that is continuous with the upper end of the cover portion 71a. The fixed portion 71c is fixed to the skeleton opening by a fixing means b such as a screw in a state where the leg portion 71b is vertically and vertically movably inserted into the insertion portion 21a of the newly installed upper frame 21. ing.

（竪枠部分の構成）
本実施形態の改修建具においては、図５に示すように、新設竪枠２３の室内側から既設竪枠１３の室内側を覆うように、防水シート８３が設けられており、防水シート８３の室内側には、断面略Ｌ字状の金属製の曲げ部材からなる竪補強部材９３が配置されている。
そして、竪取付補助材３３の室内側固定部３３ｂは、既設竪枠１３の室内側壁部１３ａ及び竪補強部材９３に対してビス等の固定手段ｂにより固定されている。 (Structure of vertical frame part)
In the repair fitting of the present embodiment, as shown in FIG. 5, a waterproof sheet 83 is provided so as to cover the indoor side of the existing vertical frame 13 from the indoor side of the new vertical frame 23, and the room of the waterproof sheet 83 is provided. Inside, a vertical reinforcing member 93 made of a metal bending member having a substantially L-shaped cross section is arranged.
The indoor side fixing portion 33b of the vertical mounting auxiliary material 33 is fixed to the indoor side wall portion 13a of the existing vertical frame 13 and the vertical reinforcing member 93 by a fixing means b such as a screw.

樹脂製の内部カバー７３は、防水シート８３及び竪補強部材９３を覆うカバー部７３ａと、新設竪枠２３の挿入部２３ａに内周方向から挿入される脚部７３ｂと、カバー部７３ａの外周側端に連続する固定部７３ｃとを有しており、脚部７３ｂを新設竪枠２３の挿入部２３ａに左右移動自在に挿入した状態で、固定部７３ｃがビス等の固定手段ｂにより躯体開口部に固定されて配置されている。 The resin inner cover 73 includes a cover portion 73a that covers the waterproof sheet 83 and the vertical reinforcing member 93, a leg portion 73b that is inserted into the insertion portion 23a of the new vertical frame 23 from the inner peripheral direction, and an outer peripheral side of the cover portion 73a. It has a continuous fixing portion 73c at the end, and in a state where the leg portion 73b is inserted into the insertion portion 23a of the new vertical frame 23 so as to be movable left and right, the fixing portion 73c is opened by a fixing means b such as a screw. It is fixed and placed in.

なお、竪補強部材９３は、例えば図５（ｂ）に示すように、アルミ形材によって形成されてもよい。 The vertical reinforcing member 93 may be formed of an aluminum profile, for example, as shown in FIG. 5 (b).

（下枠部分の構成）
本実施形態の改修建具においては、図６（ａ）に示すように、新設下枠２２の室内側壁部２２ｃから室内側に延設される室内側上壁部２２ｄと躯体開口部の上端との間には隙間ｄ２が形成され、室内側上壁部２２ｄの上面から躯体開口部にかけて、間隙を塞ぐように防水シート８２が配置されていると共に、室内側上壁部２２ｄの上面から躯体開口部にかけて、金属製の下補強部材９２が配置されている。
なお、新設下枠２２の室内側壁部２２ｃの室内側面に膨張材ホルダー２２ｍが形成され、加熱膨張材ｆが配置されていることは、第１の実施形態と同様である。 (Structure of lower frame part)
In the refurbished fitting of the present embodiment, as shown in FIG. 6A, the indoor side upper wall portion 22d extending from the indoor side wall portion 22c of the new lower frame 22 to the indoor side and the upper end of the skeleton opening A gap d2 is formed between them, and a waterproof sheet 82 is arranged from the upper surface of the indoor upper wall portion 22d to the skeleton opening so as to close the gap, and the skeleton opening is formed from the upper surface of the indoor upper wall portion 22d. A metal lower reinforcing member 92 is arranged.
It should be noted that the expansion material holder 22m is formed on the indoor side surface of the indoor side wall portion 22c of the new lower frame 22, and the thermal expansion material f is arranged, which is the same as the first embodiment.

下補強部材９２は、図６（ｂ）に示すように、新設下枠２２の室内側上壁部２２ｄと躯体開口部の上端との間の隙間ｄ２に位置する閉塞部９２ａと、閉塞部９２ａの上端から室外側に延設されて新設下枠２２の室内側上壁部２２ｄに載置される上壁部９２ｂと、躯体開口部に固定される固定部９２ｃと、固定部９２ｃの上方部位に形成される内部カバー係合部９２ｄとを有している。
そして、上壁部９２ｂを新設下枠２２の室内側上壁部２２ｄの室内側上面に載置させた状態で固定部９２ｃが躯体開口部にネジ等の固定手段ｂにより固定されている。 As shown in FIG. 6B, the lower reinforcing member 92 has a closing portion 92a located in the gap d2 between the indoor upper wall portion 22d of the newly installed lower frame 22 and the upper end of the skeleton opening, and the closing portion 92a. The upper wall portion 92b extending from the upper end of the above to the outdoor side and mounted on the indoor upper wall portion 22d of the new lower frame 22, the fixing portion 92c fixed to the skeleton opening, and the upper portion of the fixing portion 92c. It has an internal cover engaging portion 92d formed in.
Then, the fixing portion 92c is fixed to the skeleton opening by a fixing means b such as a screw in a state where the upper wall portion 92b is placed on the indoor side upper surface of the indoor side upper wall portion 22d of the newly installed lower frame 22.

新設下枠２２の室内側を覆う内部カバー７２は、室内側上壁部２２ｄ及び躯体開口部の上面を覆う天板部７２ａと、天板部７２ａの室内側に連続する室内壁部７２ｂと、天板部７２ａの室内側下面に形成された係合部７２ｅを有する長尺部材からなり、天板部７２ａの室外側端部に下方に突出する係合凸部７２ｃが形成されている。 The inner cover 72 that covers the indoor side of the new lower frame 22 includes a top plate portion 72a that covers the indoor side upper wall portion 22d and the upper surface of the skeleton opening, and an indoor wall portion 72b that is continuous with the indoor side of the top plate portion 72a. It is composed of a long member having an engaging portion 72e formed on the lower surface of the top plate portion 72a on the indoor side, and an engaging convex portion 72c protruding downward is formed at the outdoor end portion of the top plate portion 72a.

そして、内部カバー７２は、室外側に形成された係合凸部７２ｃを新設下枠２２の被係合部２２ｋに係合すると共に、室内側下面に形成された係合部７２ｅを下補強部材９２の内部カバー係合部９２ｄに係合することで、新設下枠２２及び躯体開口部に固定されている。
新設下枠２２及び躯体開口部に固定された内部カバー７２の天板部７２ａの上面は、新設下枠２２の室内側壁部２２ｃの上端とほぼ同じ高さであり、室内側壁部２２ｃの室内側おいて、室内側上壁部２２ｄの上面から躯体開口部との隙間を覆うように配置されている。 Then, the inner cover 72 engages the engaging convex portion 72c formed on the outdoor side with the engaged portion 22k of the newly installed lower frame 22, and the engaging portion 72e formed on the lower surface on the indoor side is a lower reinforcing member. By engaging with the inner cover engaging portion 92d of 92, it is fixed to the newly installed lower frame 22 and the skeleton opening.
The upper surface of the top plate portion 72a of the inner cover 72 fixed to the new lower frame 22 and the skeleton opening is substantially the same height as the upper end of the indoor side wall portion 22c of the new lower frame 22, and is on the indoor side of the indoor side wall portion 22c. It is arranged so as to cover the gap between the upper surface of the indoor upper wall portion 22d and the skeleton opening.

以上の第２の実施形態によれば、火災時に、新設下枠２２の室内側壁部２２ｃの室内側面に形成された膨張材ホルダー２２ｍに配置された加熱膨張材ｆが室内方向に向かって膨張し、新設下枠２２と下補強部材９２とによって形成された空間に充満し、新設下枠２２と躯体開口部との間の隙間を塞ぐので、改修建具の下枠部分における室内外の連通を抑制することができる。 According to the second embodiment described above, in the event of a fire, the heat expansion material f arranged in the expansion material holder 22m formed on the indoor side surface of the indoor side wall portion 22c of the new lower frame 22 expands toward the room. , The space formed by the new lower frame 22 and the lower reinforcing member 92 is filled, and the gap between the new lower frame 22 and the skeleton opening is closed, so that communication between indoors and outdoors in the lower frame portion of the repair fitting is suppressed. can do.

なお、以上の実施形態は，請求項に記載された発明を限定するものではなく，例示として取り扱われることは言うまでもない。
例えば、改修される既設枠及び新設建具は、引違い建具に限定されるものではなく、開き建具やすべり出し建具等、建具の種類は何ら限定されるものではない。 Needless to say, the above embodiments do not limit the invention described in the claims, and are treated as examples.
For example, the existing frames and new fittings to be repaired are not limited to sliding fittings, and the types of fittings such as open fittings and sliding fittings are not limited at all.

１２：既設下枠
２２：新設下枠
２２ｃ：室内側壁部
２２ｄ：室内側上壁部
２２ｋ：被係合部
２２ｍ：膨張材ホルダー
７２：内部カバー
７２ａ：天板部
７２ｃ：係合凸部
７２ｄ：脚部
ｆ：加熱膨張材

12: Existing lower frame 22: New lower frame 22c: Indoor side wall part 22d: Indoor side upper wall part 22k: Engagement part 22m: Expansion material holder 72: Internal cover 72a: Top plate part 72c: Engagement convex part 72d: Leg f: Heat expansion material

Claims

It is equipped with a new lower frame that is attached to the existing lower frame that remains in the opening of the skeleton, and an internal cover that covers the indoor side of the new lower frame.
The new lower frame has an indoor side wall portion and an indoor side upper wall portion extending from the indoor side wall portion to the indoor side.
The inner cover has a top plate portion that covers the upper surface of the indoor upper wall portion of the new lower frame, and the engaging portion formed at the outdoor end of the top plate portion is the indoor upper wall portion of the new lower frame. It is engaged with the side wall of the room at the upper position and is fixed to the opening of the frame on the indoor side of the new lower frame.
The new lower frame is a refurbished fitting in which a heat-expanding material that expands toward the gap between the new lower frame and the opening of the skeleton by heating is placed on the indoor side surface of the indoor side wall.