【０００１】
【発明の属する技術分野】
本発明は住宅等の外壁の大壁工法における胴差部の目地処理方法に関する。
【０００２】
【従来の技術】
従来、住宅の大壁工法による外壁目地構造、特に２階と１階部分の間の胴差部における目地の処理方法において、図３に示すように、上下に隣接する外壁下地パネルの間に若干の隙間、例えば６〜１０ｍｍ程度の隙間をあけ、通常の幅の目地、例えば５〜２０ｍｍ程度の幅の目地を設け、該目地にシ−リング材を充填し、目地を設けることで目地処理をしていた。（例えば、特許文献１参照。）。
【０００３】
ところが、二階と一階部分の間の胴差部において、上階の外壁パネル等の重量が前記胴差部にかかり、せっかくシ−リング材で仕上げた目地部分に外力働き、上下外壁下地パネル間の隙間が狭くなるとともに、シ−リング材にも圧縮応力が働いて、シ−リング材が外部に押し出され、目地部のフクレやシワＦとなって表面へ現れ、外観上大変見苦しくなった。
【０００４】
そこで、この目地部のフクレやシワといった欠点を隠すため、図４の（イ）に示すように意匠の異なる化粧目地ｐで仕上げるか又は（ロ）に示すように別部材としての化粧幕板１４を取り付けて上記欠点を隠蔽し、仕上げていた。化粧目地ｐを設ける方法は、目地にシ−リング材５をコ−キング処理し養生後、その上に基層塗り層（下塗り層）１１を塗装し、乾燥養生後、化粧目地ｐの施工部に養生テ−プ（図示せず）を張り、その上に模様塗り層（上塗り層）１２を塗装し、直ちに養生テ−プを除去して化粧目地ｐを設ける方法がとられていた。
【０００５】
【特許文献１】
特開平６−３２２９２７号公報（第５頁、第２図、第１１図）
【０００６】
【発明が解決しようとする課題】
しかしながら、図３に示すように、上下に隣接する外壁下地パネルの間に若干の隙間と通常の幅の目地を設け、該目地にシ−リング材５を塗布して目地処理をする従来の方法では、上記したように、上階の外壁パネル等の重量が前記胴差部にかかり、上下の外壁下地パネル間の隙間が縮まり、シ−リング材に働く圧縮応力によってシ−リング材が局部的にスジ状に押し出され、目地部のフクレやシワの発生の原因となり、それを避けるために、化粧目地又は化粧幕板で目地を隠蔽する方法では、せっかく大壁工法で仕上げようとしても、化粧目地や化粧幕板が上下外壁パネルを視覚的に分断するので、本当の意味での大壁意匠が発揮できず、意匠上の制約が生じ大きな問題点となっていた。
【０００７】
また、固く硬化するパテ材による胴差目地部の固定等も試みられたが、上階の荷重や地震等による揺れで目地部に亀裂等が発生し漏水の原因ともなっていた。
【０００８】
本発明の目的は住宅の大壁工法による外壁の胴差部の目地処理において、上階の外壁等の負荷による圧縮応力が目地部分に集中することなく適度に分散、吸収され、目地部のシ−リング材の膨れ、シワを防止し、よって化粧目地又は化粧幕板を用いなくても済み、従って、大壁意匠が失われることがなく、さらに漏水等の心配もない外壁の目地処理方法を提供することにある。
【０００９】
【課題を解決するための手段】
上記目的を達成するために本発明にかかる請求項１に記載の外壁の目地処理方法は、外壁大壁工法の胴差部の目地部において、上下方向に相互に隣接する外壁下地パネル間に広幅の傾斜目地を設け、該傾斜目地に弾性を有する目地処理材を充填することを特徴とする。
【００１０】
係る構成から、上階の外壁パネル等の荷重による圧縮応力が目地部に集中せず、適度に分散するので、目地部のシ−リング材にフクレやシワの発生が極めて少ない。すなわち、上下方向に相互に隣接する外壁下地パネル間に広幅の傾斜目地を設け、目地部の幅を従来の方法に比べて格段に広くとることによって、二階の外壁パネル等の重量からくる圧縮力の応力集中が回避でき、うまく圧縮応力が分散してくれるので、たとえ目地部のシ−リング材（目地処理材）に圧縮応力による変形が発生しても、発生した変形が広幅傾斜目地部の広い範囲に分散されるので、フクレやシワの山の高さが小さくなり、結果として表層上塗り層の弾性塗料の膨れやシワがほとんど目立たなくなり、継ぎ目のない大壁意匠が可能となり、さらに漏水等の心配もなくなるのである。
【００１１】
このように、目地部を傾斜面とすることで目地部の幅を従来より格段に広くとることができるのである。さらに、前記傾斜目地に充填される目地処理材は弾性を有する目地処理材（シ−リング材）であるので、前記圧縮応力による変形を適度に吸収でき表層上塗り層の弾性塗料の膨れやシワの発生防止に好適である。
【００１２】
また、本発明の請求項２に記載の外壁の目地処理方法は、請求項１に記載の外壁の目地処理方法において、前記隣接する外壁下地パネル間に所定の大きさの隙間を設け、該隙間に弾性体を挿入したことを特徴とする。
【００１３】
係る構成から、上記隣接外壁パネル間の隙間に設けた弾性体が上階の外壁パネルの荷重等によるシ−リング材の圧縮応力を、適度に吸収するので、上階の外壁パネルの重量等からくる圧縮力が弾性体によっても吸収、緩和され、よって目地部のシ−リング材に生じるフクレやシワの発生を、いっそう有効に抑制することができるので、前記大壁意匠性確保及び漏水防止にもいっそう効果的である。
【００１４】
また、本発明の請求項３に記載の外壁の目地処理方法は、請求項１又は２に記載の外壁の目地処理方法において、前記目地処理材がＪＩＳＫ−６２５３で定めるゴム硬度で５〜５０の範囲にあり、前記弾性体が合成樹脂発泡体からなることを特徴とする。
【００１５】
係る構成から、上階の外壁パネルの荷重等によるシ−リング材の圧縮応力の吸収、緩和がよりいっそう確実になされ、よって目地部のシ−リング材に生じるフクレやシワの発生を、よりいっそう有効に抑制することができるので、前記大壁意匠性確保及び漏水防止がよりいっそう効果的である。
【００１６】
【発明の実施の形態】
以下、図面を参考にして、本発明の実施の形態の一例を説明する。図１は本発明の目地処理方法を示す側断面図である。図２は図１のＡ部拡大図である。
【００１７】
図１、図２において、引用符号１は屋根、２は二階の外壁下地パネル、３は一階の外壁下地パネルを示す。また、４は胴差、５は目地部の弾性を有する目地処理材（シ−リング材）、６は弾性体、７は養生テ−プ、８は釘、９は通気受材、１０は二階の床下地材、ｍは広幅の傾斜目地部、１１は基層塗り層（下塗り層）、１２は模様塗り層（上塗り層）を示す。
【００１８】
本発明の外壁目地の処理方法を以下に述べる。先ず、二階の外壁パネル２と一階の外壁パネル３とのジョイント部の先端を、それぞれ傾斜面状に鉋、カッタ−ナイフ等で切削し、先端部間を所定の寸法、例えば３〜１５ｍｍ程度隙間を開けて胴差４に釘８を用いて釘着する。
【００１９】
この時、傾斜面の幅は約２０〜４０ｍｍ程度、傾斜面の深さは約５〜１０ｍｍ程度が適する。このようにしておよそ４０〜１００ｍｍ程度の大きさの幅を持つ広幅の傾斜目地部ｍを設ける。
【００２０】
次に、前記広幅の傾斜目地部ｍに弾性を有するシ−リング材（目地処理材）５を充填し、広幅の傾斜目地部ｍのコ−キング処理を行う。塗布したシ−リング材５をへらを用いて十分に平滑に仕上げる。シ−リング材５としては、弾力性を有するアクリル系、シリコン系、変性シリコン系、ポリサルファイト系、ポリオレフィン系、ポリマ−セメント系シ−リング材等を例示することができる。該シ−リング材５のゴム硬度は、５〜５０程度が望ましい。また、これらと同等の弾力性と防水性を有する弾性パテ材であれば前記例示した以外のものであっても良い。
【００２１】
この時、外壁パネル２、３の隙間の胴差部に、あらかじめ養生テ−プ７と弾性体（バックアップ材）６を設けておくと、目地部のフクレやシワをいっそう有効に抑制することができる。養生テ−プ７は通常のクラフトテ−プやプラスチックフィルムテ−プでよい。
【００２２】
この時、通気受材９は省略しても良く、特に通気工法とするときにのみ通気受材９を用いる。手順は、胴差４の表面又は通気受材９の表面に養生テ−プ７を貼着し、次に外壁下地パネル２、３の隙間の養生テ−プ７表面に弾性体（バックアップ材）６を取り付ける。該弾性体（バックアップ材）６は、外壁パネル間の隙間に見合う大きさで、その材質は合成樹脂発泡体が望ましく、例えば、ウレタン樹脂発泡体、ポリエチレン樹脂発泡体等の合成樹脂発泡体を例示することができる。これら以外に、天然ゴム、合成ゴム等を用いることも可能である。
養生テ−プ７の表面に接着剤、両面粘着テ−プ等を用いて取り付ける。以上のようにして外壁下地パネル張り工事及び本発明の目地処理方法による目地処理工事は完了する。
【００２３】
このあと、続いて仕上げ工事に入る。最初に、上記目地部のコ−キング処理養生後、コ−キング処理表面に目地補強ネットを貼着してもよい。例えばグラスファイバ−テ−プ（糊付き：（株）ベイ・ミルズ社製：幅５０ｍｍ）を例示することができる。
【００２４】
続いて、弾性水性シ−ラ−をロ−ラ−又はスプレ−で全面に塗布し常温で２時間以上養生する。次に基層塗り（下塗り）養生乾燥後、続いて模様塗り（上塗り）をほどこして外壁工事が完了する。基層塗り（下塗り）模様塗り（上塗り）は可撓性のある弾性系樹脂塗料、例えば微弾性のアクリル系塗料を用いる。塗布量は通常、基層塗り（下塗り）で１．０ｋｇ／ｍ２以上、模様塗り（上塗り）で１．５ｋｇ／ｍ２以上とする。
【００２５】
【発明の効果】
以上のように本発明に係る外壁下地パネルの目地処理方法によれば、外壁大壁工法の胴差部の目地部において、上下方向に相互に隣接する外壁パネル間に広幅の傾斜目地を設け、該傾斜目地に弾性を有する目地処理材を充填するので、上階の外壁パネル等の荷重による圧縮応力や地震による変形が目地部に局部的に集中せず、適度に分散し、目地部のシ−リング材に生ずるフクレやシワが極めて少なくなり、大壁意匠性が確保されると共に目地部の漏水等の心配もなくなる。
【００２６】
また、二階と一階で隣接する外壁下地パネル間に隙間を設け、該隙間に弾性体を挿入したので、上記隣接外壁下地パネル間の隙間に設けた弾性体が階上の外壁下地パネルの荷重によるシ−リング材の圧縮応力を適度に吸収するので、目地部のシ−リング材に生じるフクレやシワの発生を、よりいっそう有効に抑制し、大壁意匠性確保と目地部漏水防止がいっそう確実になる。
【００２７】
また、前記目地処理材のゴム硬度が５〜５０であり、前記弾性体が合成樹脂発泡体からなるので、フクレやシワの発生防止、大壁意匠性確保、漏水防止がよりいっそう効果的である。
【図面の簡単な説明】
【図１】本発明の目地処理方法を示す側断面図。
【図２】図１のＡ部拡大図。
【図３】従来の目地処理方法を示す側断面図でシワ、フクレ等の発生を示す。
【図４】従来の目地処理方法を示す側断面図。
（イ）化粧目地仕上げ。
（ロ）化粧幕板仕上げ。
【符号の説明】
１ 屋根
２ 二階の外壁下地パネル
３ 一階の外壁下地パネル
４ 胴差
５ 目地部の弾性を有する目地処理材（シ−リング材）
６ 弾性体
７ 養生テ−プ
８ 釘
９ 通気受材
１０ 二階の床下地材
ｍ 広幅の傾斜目地部
１１ 基層塗り層（下塗り層）
１２ 模様塗り層（上塗り層）
１３ 目地補強ネット
１４ 化粧幕板
１５ 従来の目地
１６ 従来の目地処理材
Ｆ フクレ
ｐ 化粧目地[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a joint treatment method of a waist portion in a large wall construction method for an outer wall of a house or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a method of treating a joint of an outer wall by a large wall method of a house, particularly, a method of treating a joint at a waist portion between a second floor and a first floor, as shown in FIG. A gap of, for example, about 6 to 10 mm is provided, a joint having a normal width, for example, a joint having a width of about 5 to 20 mm is provided, the sealing material is filled in the joint, and the joint is provided to perform the joint processing. Was. (For example, refer to Patent Document 1).
[0003]
However, in the waist portion between the second floor and the first floor portion, the weight of the outer wall panel or the like on the upper floor is applied to the waist portion, and external force acts on the joint portion finished with the sealing material, and the space between the upper and lower outer wall base panels is reduced. And the compressive stress also acted on the sealing material, and the sealing material was extruded to the outside, and appeared on the surface as blisters and wrinkles F at joints, making the appearance very unsightly.
[0004]
Therefore, in order to hide the defects such as blisters and wrinkles at the joints, the decorative joint plate 14 is finished with a decorative joint p having a different design as shown in FIG. 4A or as a separate member as shown in FIG. Was attached to conceal the above drawbacks and finished. The method of providing the decorative joint p is as follows. After sealing and curing the sealing material 5 on the joint, a base coat layer (undercoat layer) 11 is coated thereon, and after drying and curing, the joint is applied to the joint of the decorative joint p. A curing tape (not shown) is applied, a pattern coating layer (overcoat layer) 12 is applied thereon, and the curing tape is immediately removed to provide a cosmetic joint p.
[0005]
[Patent Document 1]
JP-A-6-322927 (page 5, FIG. 2, FIG. 11)
[0006]
[Problems to be solved by the invention]
However, as shown in FIG. 3, a conventional method of providing a joint having a slight gap and a normal width between the upper and lower outer wall base panels and applying a sealing material 5 to the joint to perform the joint treatment. As described above, as described above, the weight of the upper floor outer wall panel and the like is applied to the trunk portion, the gap between the upper and lower outer wall base panels is reduced, and the sealing material is locally localized by the compressive stress acting on the sealing material. In order to avoid the occurrence of blisters and wrinkles at the joints, and to avoid this, in the method of hiding the joints with a decorative joint or a decorative curtain plate, even if you try to finish with the large wall method, Since the joints and the decorative curtain visually separate the upper and lower outer wall panels, the large wall design in the true sense cannot be exhibited, which has been a major problem due to restrictions on the design.
[0007]
Attempts have also been made to fix the joint at the girth joint with a hardened putty material, but cracks and the like have been generated at the joint due to shaking due to a load on the upper floor or an earthquake or the like, causing water leakage.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to jointly treat a girder joint of an outer wall by a large wall method of a house, and compressive stress due to a load on an outer wall of an upper floor is appropriately dispersed and absorbed without concentrating on the joint, and the joint of the joint is treated. -A method for treating the outer wall joints which prevents swelling and wrinkling of the ring material and thus eliminates the need for decorative joints or decorative curtain plates, so that the large wall design is not lost and there is no risk of water leakage, etc. To provide.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the joint method of an outer wall according to claim 1 according to the present invention is characterized in that the joint between the outer wall base panels vertically adjacent to each other at the joint portion of the trunk portion of the outer wall large wall construction method has a large width. Characterized in that an inclined joint is provided, and the inclined joint is filled with an elastic joint treatment material.
[0010]
With such a configuration, the compressive stress due to the load on the outer floor panel or the like on the upper floor is not concentrated on the joints but is appropriately dispersed, so that the sealing material at the joints is very unlikely to have blisters and wrinkles. That is, by providing a wide inclined joint between the outer wall base panels adjacent to each other in the vertical direction, and by making the width of the joint part much wider than that of the conventional method, the compressive force derived from the weight of the outer wall panel and the like on the second floor is obtained. Stress concentration can be avoided and the compressive stress can be dispersed well, so even if the sealing material (joint treatment material) of the joint is deformed by the compressive stress, the generated deformation is Since it is dispersed over a wide range, the height of blisters and wrinkles is reduced, and as a result, the swelling and wrinkles of the elastic paint on the surface top coating layer are almost inconspicuous, enabling seamless large wall designs, and water leakage etc. No more worry.
[0011]
Thus, the width of the joint portion can be made much wider than before by making the joint portion an inclined surface. Further, since the joint treatment material filled in the inclined joint is a joint treatment material having elasticity (sealing material), deformation due to the compressive stress can be appropriately absorbed, and swelling and wrinkling of the elastic paint of the surface top coat layer can be prevented. It is suitable for preventing occurrence.
[0012]
According to a second aspect of the present invention, there is provided the joint processing method for an outer wall according to the first aspect, wherein a gap having a predetermined size is provided between the adjacent outer wall base panels. Characterized in that an elastic body is inserted therein.
[0013]
With such a configuration, the elastic body provided in the gap between the adjacent outer wall panels appropriately absorbs the compressive stress of the sealing material due to the load on the outer floor panel on the upper floor, so that the weight of the outer wall panel on the upper floor, etc. Compression force is also absorbed and relaxed by the elastic body, so that the occurrence of blisters and wrinkles generated in the sealing material at the joint can be more effectively suppressed, so that the large wall design can be ensured and water leakage can be prevented. It is even more effective.
[0014]
The joint processing method for an outer wall according to claim 3 of the present invention is the joint processing method for an outer wall according to claim 1 or 2, wherein the joint processing material has a rubber hardness of 5 to 50 as defined by JISK-6253. And the elastic body is made of a synthetic resin foam.
[0015]
With such a configuration, absorption and relaxation of the compressive stress of the sealing material due to the load of the outer floor panel on the upper floor and the like are more reliably performed, and thus the occurrence of blisters and wrinkles generated in the sealing material at the joint is further reduced. Since it can be effectively suppressed, the design of the large wall and the prevention of water leakage are more effective.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view showing the joint processing method of the present invention. FIG. 2 is an enlarged view of a portion A in FIG.
[0017]
1 and 2, reference numeral 1 denotes a roof, 2 denotes an outer wall base panel on the second floor, and 3 denotes an outer wall base panel on the first floor. Reference numeral 4 denotes a difference in body, 5 denotes a joint treatment material (sealing material) having elasticity of joints, 6 denotes an elastic body, 7 denotes a curing tape, 8 denotes a nail, 9 denotes a ventilation receiving material, and 10 denotes a second floor. , M indicates a wide inclined joint portion, 11 indicates a base coat layer (undercoat layer), and 12 indicates a pattern coat layer (overcoat layer).
[0018]
The method for treating an outer wall joint according to the present invention will be described below. First, the ends of the joints between the second-floor outer wall panel 2 and the first-floor outer wall panel 3 are cut into planes, cutters, knives, or the like in an inclined plane, respectively, and the distance between the distal ends is a predetermined dimension, for example, about 3 to 15 mm. A gap is opened and nails are attached to the body difference 4 using nails 8.
[0019]
At this time, the width of the slope is about 20 to 40 mm, and the depth of the slope is about 5 to 10 mm. In this way, a wide inclined joint portion m having a width of about 40 to 100 mm is provided.
[0020]
Next, the wide inclined joint portion m is filled with a sealing material (joint treatment material) 5 having elasticity, and coking processing of the wide inclined joint portion m is performed. The applied sealing material 5 is sufficiently smoothed using a spatula. Examples of the sealing material 5 include elastic acrylic, silicon-based, modified silicon-based, polysulfite-based, polyolefin-based, and polymer-cement-based sealing materials having elasticity. The rubber hardness of the sealing material 5 is preferably about 5 to 50. In addition, any other elastic putty material having the same elasticity and waterproofness as those described above may be used.
[0021]
At this time, if a curing tape 7 and an elastic body (backup material) 6 are provided in advance in the body difference portion between the outer wall panels 2 and 3, the blisters and wrinkles at the joints can be more effectively suppressed. it can. The curing tape 7 may be an ordinary craft tape or a plastic film tape.
[0022]
At this time, the ventilation receiver 9 may be omitted, and the ventilation receiver 9 is used only when the ventilation method is used. The procedure is as follows. A curing tape 7 is stuck on the surface of the waist 4 or the surface of the ventilation receiving material 9, and then an elastic body (backup material) is provided on the surface of the curing tape 7 in the gap between the outer wall base panels 2 and 3. 6 is attached. The elastic body (backup material) 6 has a size corresponding to the gap between the outer wall panels, and is preferably made of a synthetic resin foam, for example, a synthetic resin foam such as a urethane resin foam or a polyethylene resin foam. can do. In addition, natural rubber, synthetic rubber, and the like can be used.
It is attached to the surface of the curing tape 7 using an adhesive, a double-sided adhesive tape or the like. As described above, the outer wall base panel paneling work and the joint processing work by the joint processing method of the present invention are completed.
[0023]
After that, the finishing work starts. First, after the coking treatment of the joint is cured, a joint reinforcement net may be attached to the coking treatment surface. For example, a glass fiber tape (with glue: Bay Mills Co., Ltd., width: 50 mm) can be exemplified.
[0024]
Subsequently, an elastic aqueous sealer is applied to the entire surface with a roller or a sprayer and cured at room temperature for 2 hours or more. Next, after the base layer coating (undercoating) curing and drying, a pattern coating (overcoating) is subsequently applied to complete the outer wall construction. The base layer coating (undercoating) and the pattern coating (overcoating) use a flexible elastic resin paint, for example, a microelastic acrylic paint. The application amount is usually 1.0 kg / m 2 or more for the base coat (undercoat) and 1.5 kg / m 2 or more for the pattern coat (overcoat).
[0025]
【The invention's effect】
As described above, according to the joint processing method of the outer wall base panel according to the present invention, at the joint of the waist portion of the outer wall large wall method, a wide inclined joint is provided between the outer wall panels adjacent to each other in the vertical direction. Since the sloping joints are filled with an elastic joint treatment material, the compressive stress due to the load on the outer floor panel of the upper floor or the deformation due to the earthquake is not locally concentrated at the joints, but is appropriately dispersed, and the joints at the joints are appropriately dispersed. -The blisters and wrinkles generated in the ring material are extremely reduced, the design of the large wall is ensured, and there is no fear of water leakage at joints.
[0026]
In addition, since a gap is provided between the outer wall base panels adjacent to each other on the second floor and the first floor, and an elastic body is inserted into the gap, the elastic body provided in the gap between the adjacent outer wall base panels has a load on the outer wall base panel on the floor. Moderately absorbs the compressive stress of the sealing material, thereby effectively suppressing the occurrence of blisters and wrinkles that occur in the sealing material at the joints, ensuring the design of large walls and preventing the joints from leaking. Be certain.
[0027]
Further, since the rubber hardness of the joint treatment material is 5 to 50 and the elastic body is made of a synthetic resin foam, prevention of occurrence of blisters and wrinkles, securing large wall design, and prevention of water leakage are more effective. .
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a joint processing method of the present invention.
FIG. 2 is an enlarged view of a portion A in FIG.
FIG. 3 is a side sectional view showing a conventional joint processing method, showing occurrence of wrinkles, blisters and the like.
FIG. 4 is a side sectional view showing a conventional joint processing method.
(A) Makeup joint finish.
(B) Finished curtain plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Roof 2 The basement panel of the outer wall of the second floor 3 The basement panel of the outer wall of the first floor 4 Body gap 5 Jointing treatment material (sealing material) which has the elasticity of the joint part
Reference Signs List 6 Elastic body 7 Curing tape 8 Nail 9 Ventilation receiving material 10 Second floor flooring material m Wide sloped joint part 11 Base coat layer (undercoat layer)
12 Pattern coating layer (overcoat layer)
13 Joint Reinforcement Net 14 Decorative Curtain Board 15 Conventional Joint 16 Conventional Joint Treatment Material F
