JP2010077696A - Repair drain made of soft thermoplastic resin, molding method of repair drain made of soft thermoplastic resin, and repair drain structure - Google Patents
Repair drain made of soft thermoplastic resin, molding method of repair drain made of soft thermoplastic resin, and repair drain structure Download PDFInfo
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Description
既設の屋上やバルコニー等をシート防水工法で改修する時に、既設ドレインに適用する軟質熱可塑性樹脂製縦型改修ドレイン、軟質熱可塑性樹脂製改修ドレインの成形方法及び改修ドレイン構造に関する。 The present invention relates to a soft thermoplastic resin vertical repair drain, a soft thermoplastic resin repair drain molding method, and a repair drain structure that are applied to an existing drain when repairing an existing rooftop, balcony, or the like with a sheet waterproofing method.
従来、建物の屋上等をシート防水工法で改修する際、既設のドレインに該ドレインの排水口径より小さい口径の改修ドレインを差込むことが一般的に行われている。改修ドレインは、防水シートと接合するツバ状部と既設ドレインの排水口に差し込む長さ１００〜１５０ｍｍ程度の排水筒とから形成されており、成形方法として、一般的には射出成形が採用され前記形状に成形される。既設ドレインの排水口に改修ドレインの排水筒が充分な長さで差し込むため図５のように、改修ドレインの排水筒部に該排水筒部の外径と同等か又はそれより若干（２ｍｍ程度まで）大きい内径を有するジャバラホースや別の筒状部材を接合し継ぎ足して所定の長さにしている（特許文献１参照）。しかし、改修ドレインを射出成形で成形している場合、金型に２〜５°の抜き勾配（図４のＲに相当）をつけないと排水筒部を金型から脱型することができない。このため、排水筒部の筒先ほど口径が小さく先細り傾向になり、延長ホースを接合した場合、抜き勾配があるため接合部に隙間が出来やすくなり、シーリングしても接合部の水密性を十分確保することが難しくなる。また、射出成形では排水筒部を長くした一体成形も可能であるが、あまり長くした場合、上記のように抜き勾配を設けるため筒先で口径が小さくなってしまう。筒先の口径が小さくなると排水容量が低下するため、射出成形で成形した改修ドレインの筒長さは１００ｍｍが限界となってしまう。 Conventionally, when a rooftop of a building is repaired by a sheet waterproofing method, it is generally performed to insert a repair drain having a smaller diameter than the drain diameter of the drain into an existing drain. The renovation drain is formed from a flange-like portion to be joined to the waterproof sheet and a drain tube having a length of about 100 to 150 mm to be inserted into a drain outlet of an existing drain. Molded into a shape. Since the drain of the modified drain is inserted into the drain outlet of the existing drain with a sufficient length, as shown in FIG. 5, the drain cylinder of the modified drain is equal to or slightly more than the outer diameter of the drained cylinder (up to about 2 mm). ) A bellows hose having a large inner diameter or another cylindrical member is joined and added to a predetermined length (see Patent Document 1). However, when the modified drain is formed by injection molding, the drain tube part cannot be removed from the mold unless a draft of 2 to 5 ° (corresponding to R in FIG. 4) is attached to the mold. For this reason, the pipe diameter of the drainage cylinder part tends to be smaller and taper, and when an extension hose is joined, there is a draft angle, so it becomes easy to create a gap in the joint part, and sufficient water tightness of the joint part is ensured even after sealing It becomes difficult to do. In addition, in the injection molding, an integral molding with a long drainage cylinder portion is possible. However, if it is made too long, the draft is provided as described above, so that the diameter becomes small at the cylinder tip. Since the drainage capacity decreases as the diameter of the tube tip decreases, the tube length of the modified drain formed by injection molding is limited to 100 mm.
さらに、断熱仕様のシート防水工法で改修する場合には、ポリスチレンフォームなどの断熱材の厚み相当分下地が嵩さ上げされ、排水筒が既設ドレインの排水管に充分な長さで挿入するため、上述のようにジャバラホース等の延長排水ホースを接合するが、改修ドレインの排水筒径を延長排水ホースの口径に合わせながら既設ドレインに差し込めるように設計すると、延長排水ホースの内径と外径の径差により、既設ドレインに対して改修ドレインの口径が極端に小さくなり、改修時の排水量が確保できなくなるという問題が生じる。 Furthermore, when refurbishing with a sheet waterproof construction method with heat insulation specifications, the base is raised by the equivalent thickness of the heat insulating material such as polystyrene foam, and the drain tube is inserted into the drain pipe of the existing drain with a sufficient length, As described above, an extension drain hose such as a bellows hose is joined, but if the drain tube diameter of the modified drain is designed to be plugged into the existing drain while matching the diameter of the extension drain hose, the inner diameter and outer diameter of the extension drain hose Due to the difference in diameter, there is a problem that the diameter of the repair drain becomes extremely small with respect to the existing drain, and the amount of drainage at the time of repair cannot be secured.
別な改修方法として、既設の防水シート及び既設ドレインのフランジ部に新規防水シートを接着して敷設し、導水筒体対応部分の新規防水シートを切除して、改修ドレイン部材のフランジ板と防水層押えで導水筒体対応部分の新規防水シート端縁を挟持して防水シート端縁からの漏水を防止する技術（特許文献２参照）が提案されているが、ドレイン改修部材が多くなり、改修工事も煩雑となりコスト高に繋がってしまう。
また、排水量を確保するために、既設ドレインを撤去し、新規ドレインを施工する方法も考えられるが、既設配管の取り外しなどの工事には、大きな手間とコストが発生してしまう。
As another refurbishment method, a new waterproof sheet is bonded and laid on the existing waterproof sheet and the flange of the existing drain, and the new waterproof sheet corresponding to the water conduit is cut off, and the flange plate and waterproof layer of the repair drain member A technology to prevent water leakage from the edge of the waterproof sheet by holding the edge of the new waterproof sheet at the part corresponding to the water guide cylinder with the presser has been proposed (see Patent Document 2), but the number of drain repair members increases, and the repair work Becomes complicated and leads to high costs.
Moreover, in order to secure the amount of drainage, a method of removing the existing drain and constructing a new drain is conceivable. However, construction such as removal of the existing pipes requires a lot of labor and cost.
以上のように、従来の改修方法では、排水容量の低下、施工時の接合ミスによる漏水の危険、部材や作業工程が増えることによるコスト高などの問題があり、更には、経年後に再改修する際は、更に排水口径の小さい改修ドレインを挿入することになり、排水量の確保がより難しくなる。
本発明は、上記の問題点に鑑みてなされたもので、改修時に漏水の危険が無く水密性の信頼性を高め、充分な排水容量を確保でき、部材、作業工程を低減でき、低コストであり、さらに再改修時に工事の簡易化が図れる軟質熱可塑性樹脂製改修ドレイン、軟質熱可塑性樹脂製改修ドレインの成形方法及び改修ドレイン構造を提供することにある。 The present invention has been made in view of the above-mentioned problems, and there is no risk of water leakage at the time of refurbishment, the reliability of water tightness is improved, sufficient drainage capacity can be secured, members and work processes can be reduced, and the cost can be reduced. Furthermore, another object of the present invention is to provide a soft thermoplastic resin repair drain, a soft thermoplastic resin repair drain molding method, and a repair drain structure, which can simplify the construction during refurbishment.
斯かる目的を達成するために本発明の講じた手段は、長さが２００〜５００ｍｍである長尺排水筒とツバ状部材とを一体成形してなることを特徴とする軟質熱可塑性樹脂製縦型改修ドレインとしたことであり(請求項１)、長さが２００〜５００ｍｍである長尺排水筒とツバ状部材とをディッピング成形法により一体成形する軟質熱可塑性樹脂製縦型改修ドレインの成形方法としたことであり(請求項２)、請求項１に記載の軟質熱可塑性樹脂製縦型改修ドレインの長尺排水筒を既設のドレイン排水口に差し込み、上記軟質熱可塑性樹脂製縦型改修ドレインのツバ状部材の上に新設の熱可塑性樹脂製防水シートを敷設し、該ツバ状部材と該新設の熱可塑性樹脂製防水シート裏面とを溶着して形成する縦型改修ドレイン構造としたことであり(請求項３)、長さが２００〜５００ｍｍである長尺排水筒とツバ状部材とを一体成形した第２の軟質熱可塑性樹脂製の縦型改修ドレインの長尺排水筒を、請求項３に記載の縦型改修ドレイン構造の長尺排水筒内に差し込み、第２の軟質熱可塑性樹脂製の縦型改修ドレインのツバ状部材と上記新設の熱可塑性樹脂製防水シート表面とを溶着し２重ドレイン構造とする縦型改修ドレイン構造としたことである(請求項４)。
In order to achieve such an object, the means taken by the present invention is a longitudinal body made of a soft thermoplastic resin, characterized in that a long drain tube having a length of 200 to 500 mm and a flange-like member are integrally formed. (1) Molding of a vertical thermoplastic drain made of a soft thermoplastic resin, in which a long drain tube having a length of 200 to 500 mm and a flange-like member are integrally formed by dipping molding (Claim 2), the long vertical drain of the soft thermoplastic resin vertical repair drain according to
本発明によれば、排水筒を長尺にすることにより、排水筒を十分な長さで既設の排水管に差し込めるため排水筒と延長用排水管とを接合する必要がなく水密性が高まる。また、長尺排水筒とツバ状部材とを接合部がないように一体成形することにより、改修ドレインとしての強度、耐久性が増し水密性が向上し、長尺排水筒とツバ状部材とを接合する工程が必要なくコスト低減になる。さらに、軟質熱可塑性樹脂製であるため新設防水シートと熱又は溶剤等で溶着でき新設の熱可塑性樹脂製防水シートと改修ドレインの接合強度が高まり、接合作業性が向上する。 According to the present invention, by making the drain tube long, the drain tube can be inserted into the existing drain pipe with a sufficient length, so that it is not necessary to join the drain pipe and the extension drain pipe, thereby improving the water tightness. . Also, by integrally forming the long drainage tube and the collar-like member so that there is no joint, the strength and durability as a repair drain are increased and the water tightness is improved. There is no need for a bonding step, which reduces costs. Furthermore, since it is made of a soft thermoplastic resin, it can be welded to the newly installed waterproof sheet with heat or a solvent or the like, and the bonding strength between the newly installed waterproof sheet of the thermoplastic resin and the repair drain is increased, and the joining workability is improved.
ディッピング成形により一体成形するにすることより、射出成形のように抜き勾配をとらなくとも脱型が可能となり長尺排水筒の長さを長くしても排水筒の筒元と筒先の口径を同じにできるため排水容量を充分確保することができる。また、射出成形と異なり金型が安価なため改修現場の状況に合わせて、各種の改修ドレインを作成することができる。 By integrally molding by dipping molding, it is possible to remove the mold without taking a draft as in injection molding, and even if the length of the long drainage pipe is lengthened, the diameter of the drainage cylinder and the tip of the cylinder are the same Therefore, sufficient drainage capacity can be secured. In addition, unlike injection molding, since the mold is inexpensive, various repair drains can be created in accordance with the situation of the repair site.
軟質熱可塑性樹脂製の縦型改修ドレインの長尺排水筒を既設のドレイン排水口に差し込み、上記軟質熱可塑性樹脂製の縦型改修ドレインのツバ状部材の上に新設の熱可塑性樹脂製防水シートを敷設し、上記ツバ状部材と該新設の熱可塑性樹脂製防水シート裏面とを溶着して形成することにより、水密性、耐久性の優れた縦型改修ドレイン構造とすることができ、コスト低減にもなり接合作業などの施工性も向上する。 Insert a long drain tube of a vertical modified drain made of soft thermoplastic resin into an existing drain outlet, and install a new thermoplastic resin tarpaulin on the flange-shaped member of the vertical modified drain made of soft thermoplastic resin , And welded to the back surface of the newly formed thermoplastic resin waterproof sheet, the vertical repair drain structure with excellent water-tightness and durability can be obtained. Also, workability such as joining work is improved.
上記縦型改修ドレイン構造の長尺排水筒内に、長尺排水筒とツバ状部材からなる第２の軟質熱可塑性樹脂製縦型改修ドレインの長尺排水筒を差し込み、第２の軟質熱可塑性樹脂製の縦型改修ドレインのツバ状部材と上記新設の熱可塑性樹脂製防水シートの表面とを溶着し２重ドレイン構造とすることにより、経年後の次回改修時に第２の軟質熱可塑性樹脂製縦型改修ドレインのツバ状部材を残して長尺排水筒部分を切除して、その残したツバ状部材と新たに敷設する熱可塑性樹脂製防水シート裏面とを溶着するだけで、水密性を維持したうえ改修できるため大幅な省力化、コスト低減ができる。 The second soft thermoplastic resin is inserted into the long drainage pipe of the vertical repair drain structure, and the second soft thermoplastic resin vertical drainage drainage pipe made of the long drainage pipe and the flange-like member is inserted. By welding the flange-shaped member of the vertical repair drain made of resin and the surface of the above-mentioned new thermoplastic resin tarpaulin to make a double drain structure, it is made of the second soft thermoplastic resin at the next repair after a year Maintaining water-tightness by simply removing the long drainage cylinder part while leaving the flange-like member of the vertical renovation drain, and welding the remaining flange-like member to the newly laid thermoplastic resin tarpaulin. In addition, it can be refurbished, resulting in significant labor savings and cost reduction.
本発明では、請求項４に記載の第２の軟質熱可塑性樹脂製縦型改修ドレインを単に第２の改修ドレインといい、それ以外の本発明に係る軟質熱可塑性樹脂製縦型改修ドレインを第１の改修ドレインという。以下、本発明の実施の形態を、図面を参照して詳しく説明するが、本発明はこれらの図面に限定されるものではない。 In the present invention, the second vertical modified drain made of soft thermoplastic resin according to claim 4 is simply referred to as the second modified drain, and the other vertical modified drain made of soft thermoplastic resin according to the present invention is referred to as the second modified drain. It is called 1 improvement drain. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these drawings.
［実施の形態１］
本発明の第１、第２の改修ドレインを説明する。
第１、第２の改修ドレインは、図１に示すように長尺排水筒とツバ状部材とで構成されており、長尺排水筒とツバ状部材とに接合部が無いように軟質熱可塑性樹脂を一体成形して形成されている。
[Embodiment 1]
The first and second modified drains of the present invention will be described.
As shown in FIG. 1, the first and second modified drains are composed of a long drain tube and a flange-like member, and are soft thermoplastic so that there is no joint between the long drain tube and the flange-like member. It is formed by integrally molding resin.
第１、第２の改修ドレインともに、長尺排水筒とツバ状部材の厚さは加工性（離型性）、施工性（溶着作業性）、強度を考慮すると０．３〜３ｍｍがよく、０．５〜２ｍｍがより好ましい。長尺排水筒の長さは、２００〜５００ｍｍである。長さが２００ｍｍ未満では排水が既設排水管上部に逆流し改修ドレインと既設防水シートの間に水が浸入する危険があり、ジャバラホース等の連結が必要となるため、部材や作業工程が増えて好ましくない。長尺排水筒の長さは５００ｍｍ以上の成形も可能であるが、ドレイン改修において逆流防止のためには長尺排水筒の長さは５００ｍｍまでで充分であり、それ以上長くすることは材料コストが高くなるだけで意味が無い。
第１、第２の改修ドレインともに、長尺排水筒の断面形状は円形、楕円形、多角形が良く、排水性、加工性を考慮すると円形が良い。ツバ状部材の外周形状は円形、楕円形、多角形が良く、施工性、改修ドレイン構造の仕上がり外観を考慮すると円形が好ましい。
For both the first and second modified drains, the thickness of the long drain tube and the flange-like member is preferably 0.3 to 3 mm in consideration of workability (releasability), workability (welding workability), and strength. 0.5-2 mm is more preferable. The length of the long drain tube is 200 to 500 mm. If the length is less than 200 mm, the drainage will flow back to the upper part of the existing drainage pipe, and there is a risk of water entering between the repair drain and the existing waterproof sheet. It is not preferable. The length of the long drain can be formed to 500 mm or more, but the length of the long drain can be up to 500 mm to prevent backflow in drain repair. It just does n’t make sense to get higher.
For both the first and second modified drains, the cross-sectional shape of the long drainage cylinder is preferably a circle, an ellipse, or a polygon, and a circle is preferable in view of drainage and workability. The outer shape of the brim-like member is preferably a circle, an ellipse, or a polygon, and a circle is preferable in consideration of workability and the finished appearance of the modified drain structure.
既設ドレインの排水管口径は、使用される部位により設定されるが、一般的には５０〜３００ｍｍ程度であり、第１、第２の改修ドレインも５０〜３００ｍｍ程度の口径のものが使用される。
前述したように、排水容量を確保するには、長尺排水筒の筒元（ツバ状部材側）と筒先の内径の差は少ないほうがよく、図４のＲに相当する抜き勾配が０〜２°（角度）がよく、０〜１°（角度）が好ましい。この角度は射出成形法では困難な抜き勾配である。
The drain pipe diameter of the existing drain is set depending on the part to be used, but is generally about 50 to 300 mm, and the first and second modified drains also have a diameter of about 50 to 300 mm. .
As described above, in order to secure the drainage capacity, it is better that the difference between the inner diameter of the long drainage cylinder (the flange-like member side) and the inner diameter of the cylinder tip is small, and the draft corresponding to R in FIG. The angle (angle) is good, and 0 to 1 ° (angle) is preferable. This angle is a draft that is difficult with the injection molding method.
第１の改修ドレインは、図６のように改修時に長尺排水筒を既設ドレインの排水管内に差込み、ツバ状部材を新設の熱可塑性樹脂製防水シート裏面と溶着される。既設ドレインの排水管内径と第１の改修ドレインの長尺排水筒外径との差［（既設ドレインの排水管内径）−（第１の改修ドレインの長尺排水筒外径）］は１〜１０ｍｍの範囲がよく、施工性、排水性を考慮すると２〜５ｍｍが好ましい。
本発明で使用する第２の改修ドレインは、図７のように長尺排水筒を、縦型改修ドレイン構造の第１の改修ドレインの長尺排水筒内に差し込み、ツバ状部材と新設の熱可塑性樹脂製防水シート表面とを溶着するものである。第１の改修ドレインの長尺排水筒内径と第２の改修ドレインの長尺排水筒外径との差［（第１の改修ドレインの長尺排水筒の内径）−（第２の改修ドレインの長尺排水筒外径）］は１〜１０ｍｍの範囲がよく、施工性、排水性を考慮すると２〜５ｍｍが好ましい。
As shown in FIG. 6, the first modified drain has a long drain tube inserted into the drain pipe of the existing drain at the time of the modification, and the brim-like member is welded to the rear surface of the newly formed thermoplastic resin waterproof sheet. The difference between the inner diameter of the drain of the existing drain and the outer diameter of the long drain tube of the first modified drain [(the inner diameter of the drain pipe of the existing drain) − (the outer diameter of the long drain of the first modified drain)] is 1 to 1. The range of 10 mm is good, and 2 to 5 mm is preferable in consideration of workability and drainage.
As shown in FIG. 7, the second modified drain used in the present invention is a long drainage tube inserted into the elongated drainage tube of the first modified drain having a vertical modified drain structure, and a brim-like member and a newly installed heat drain. It welds the surface of the waterproof sheet made of plastic resin. Difference between the inner diameter of the long drainage pipe of the first modified drain and the outer diameter of the elongated drainage pipe of the second modified drain [(inner diameter of the elongated drainage pipe of the first modified drain) − (the second modified drain The long drain tube outer diameter)] is preferably in the range of 1 to 10 mm, and preferably 2 to 5 mm in consideration of workability and drainage.
本発明の第１、第２の改修ドレインは、ディッピング成形法、パウダー成形法などで形成できディッピング成形法が好ましい。また、押出成形等で円筒とシートを別々に成形し、シートをくり抜いてツバ状部材とし円筒と熱溶着すれば同形状の縦型改修ドレインは得られる。しかしながら、この方法は一体成形ではなく接合面積も大きく取れないため、接合部での強度、水密性に不安が残り、また１工程が増えてコストアップに繋がり好ましくない。 The first and second modified drains of the present invention can be formed by a dipping molding method, a powder molding method or the like, and the dipping molding method is preferable. Further, if a cylinder and a sheet are separately formed by extrusion molding or the like, and the sheet is cut out to form a brim-like member and thermally welded to the cylinder, the vertical repair drain having the same shape is obtained. However, this method is not integral molding, and a large joining area cannot be obtained. Therefore, anxiety remains in the strength and water tightness at the joining portion, and one step is increased, leading to an increase in cost.
本発明で云うディッピング成形方法とは、液状の樹脂が入った槽内に予熱した金型を浸漬し槽内から金型を引き上げて金型の周囲に付着した液状樹脂を加熱固化後冷却して賦形する方法である。パウダー成形方法とは、樹脂パウダーを加熱した金型に付着させ樹脂を加熱溶融させてから冷却して賦形する方法である。
ディッピング成形方法では、図２に示す金型を使用しツバ状部材或いは長尺排水筒の端縁を支持具で保持して成形すると、ツバ状部材の上側と長尺排水筒の内側とが一体となり［図３（イ）内成形］、ツバ状部材の下側と長尺排水筒の外側とが一体となり［図３（ロ）外成形］、ツバ状部材の外周部分と長尺排水筒の端縁を切除すれば径の異なる２種類の改修用ドレインが同時に作成できる。もちろん、どちらか一側の成形でも良い。金型本体への支持具の取り付けはネジ式で螺合しても、溶接してもよいが、成形品からツバ状部材或いは長尺排水筒の端縁部分を切除するにはネジ式で支持具が金型本体から取り外せる方が扱いやすい。
パウダー成形方法でもディッピング成形方法と同様のことが言え、径の異なる２種類の縦型改修ドレインを同時に作成することができる。
The dipping molding method referred to in the present invention is a method in which a preheated mold is immersed in a tank containing a liquid resin, the mold is lifted from the tank, and the liquid resin adhering to the periphery of the mold is heated and solidified and then cooled. It is a method of shaping. The powder molding method is a method in which resin powder is attached to a heated mold, the resin is heated and melted, and then cooled and shaped.
In the dipping molding method, when the mold shown in FIG. 2 is used and the edge of the collar-shaped member or the long drain tube is held by the support, the upper side of the collar-shaped member and the inside of the elongated drain cylinder are integrated. [Fig. 3 (B) inner molding], the lower side of the flange-shaped member and the outer side of the long drain tube are integrated [Fig. 3 (B) outer molding], the outer peripheral portion of the flange-shaped member and the long drain tube If the edge is cut off, two types of repair drains having different diameters can be formed simultaneously. Of course, either one of the moldings may be used. Mounting of the support to the mold body can be screwed or welded, but it can be screwed to cut off the edge of the flange-shaped member or long drainage tube from the molded product. It is easier to handle if the tool can be removed from the mold body.
The powder molding method is the same as the dipping molding method, and two types of vertical repair drains having different diameters can be created simultaneously.
ディッピング成形、パウダー成形で、金型から脱型する際は、図３（イ）に示す内成形の場合、樹脂は軟質の熱可塑性樹脂であるため曲げやすく、金型と成形品とを長尺排水筒の端部から順次剥がして内側に湾曲させていけばツバ状部材側から容易に抜き取れる。また、図３（ロ）に示す外成形の場合、金型と成形品とを長尺排水筒の端部から剥がして細いピンなどを差し込んで、金型と成形品とを剥離すればツバ状部材側と反対方向に長尺排水筒を引っ張れば金型から抜き取ることができる。 When removing from the mold by dipping molding or powder molding, the inner molding shown in Fig. 3 (a) is easy to bend because the resin is a soft thermoplastic resin. If it peels one by one from the end of the drain tube and curves inward, it can be easily pulled out from the brim-like member side. In the case of the outer molding shown in FIG. 3 (b), the mold and the molded product are peeled off from the end of the long drain tube, a thin pin is inserted, and the mold and the molded product are peeled off to form a flange shape. If the long drain tube is pulled in the direction opposite to the member side, it can be extracted from the mold.
ディッピング成形方法で用いる液状樹脂としては、熱可塑性樹脂を可塑剤、有機溶剤、水などに分散或いは溶解したものが使用できる。塩化ビニル樹脂の場合は、乳化重合法塩化ビニル樹脂パウダーに安定剤等の添加剤を所望量加え、可塑剤に分散した塩化ビニル樹脂ペーストが加工性よく好ましい。
パウダー成形方法に用いる樹脂パウダーは、軟質の熱可塑性樹脂ペレットを粉砕することなどによりパウダー状にすればよい。塩化ビニル樹脂の場合は、懸濁重合法塩化ビニル樹脂に可塑剤、安定剤等の添加剤を所望量加えてドライブレンドしパウダー状としたものが使用できる。
As the liquid resin used in the dipping molding method, a resin in which a thermoplastic resin is dispersed or dissolved in a plasticizer, an organic solvent, water or the like can be used. In the case of a vinyl chloride resin, a vinyl chloride resin paste in which a desired amount of an additive such as a stabilizer is added to the emulsion polymerization method vinyl chloride resin powder and dispersed in a plasticizer is preferable with good workability.
The resin powder used in the powder molding method may be powdered by pulverizing soft thermoplastic resin pellets. In the case of a vinyl chloride resin, it is possible to use a suspension polymerization method vinyl chloride resin which is added in a desired amount with additives such as a plasticizer and a stabilizer and dry blended into a powder form.
本発明で、第１、第２の改修ドレイン及び新設の熱可塑性樹脂製防水シートに使用される熱可塑性樹脂としては、塩化ビニル系樹脂、オレフィン系樹脂（エチレン−酢酸ビニル共重合樹脂、エチレン−アクリル系モノマーとの共重合樹脂等）、アクリル系樹脂、熱可塑性エラストマー（オレフィン系、スチレン系、ポリエステル系、ウレタン系等）などが挙げられ、強度、施工性、コストを考えると塩化ビニル系樹脂、熱可塑性エラストマーが好ましい。また、第１、第２の改修ドレインと新設の熱可塑性樹脂製防水シートとは溶着するため同一又は同種の樹脂を用いることが好ましい。溶着とは、熱溶着、溶剤溶着のことをいい接着剤接着と比べて接合強度、耐久性が高くなる。 In the present invention, as the thermoplastic resin used in the first and second modified drains and the newly provided thermoplastic resin waterproof sheet, vinyl chloride resin, olefin resin (ethylene-vinyl acetate copolymer resin, ethylene- Copolymer resins with acrylic monomers), acrylic resins, thermoplastic elastomers (olefins, styrenes, polyesters, urethanes, etc.), and vinyl chloride resins when considering strength, workability, and cost A thermoplastic elastomer is preferred. In addition, since the first and second modified drains and the newly provided thermoplastic resin waterproof sheet are welded, it is preferable to use the same or the same type of resin. Welding refers to heat welding and solvent welding, and has higher bonding strength and durability than adhesive bonding.
［実施の形態２］
次に縦型改修ドレイン構造について説明する。
先ず、既設のドレイン本体を残して、ストレーナー、金具などを取り除いて、本発明の第１の改修ドレインの長尺排水筒を既設ドレイン本体の排水口に差し込み、既設防水シート上にツバ状部材が接するように第１の改修ドレインを配置する。このとき、既設防水シートと第１の改修ドレインのツバ状部材とは接着剤、シーリング剤等で接合したほうが、後の施工性がよく好ましいが、必ずしも接合する必要はない。
次に、防水下地に施工されている既設の防水シートに複数の新設防水シートを敷き並べ、ドレイン廻りを残して防水下地又は既設の防水シートに順次固定していき、隣り合った新設防水シート同士の端縁を溶着等で接合する。ドレイン廻りについては、第１の改修ドレインの長尺排水筒内径に見合う大きさで、第１の改修ドレインの長尺排水筒に対応する位置で新設防水シートに穴を開け、新設防水シート裏面を第１の改修ドレインのツバ状部材に溶着して図６に示すような改修ドレイン構造とする。
[Embodiment 2]
Next, the vertical repair drain structure will be described.
First, leave the existing drain main body, remove the strainer, metal fittings, etc., insert the long drainage cylinder of the first modified drain of the present invention into the drain outlet of the existing drain main body, and the brim-like member on the existing waterproof sheet The first repair drain is disposed so as to contact. At this time, it is preferable that the existing waterproof sheet and the brim-like member of the first repair drain are joined together with an adhesive, a sealing agent, or the like because the subsequent workability is better, but it is not always necessary to join them.
Next, several new waterproof sheets are laid out on the existing waterproof sheet installed on the waterproof base, and are fixed to the waterproof base or the existing waterproof sheet in order, leaving the drain area, and the adjacent new waterproof sheets The end edges of these are joined by welding or the like. As for the drain area, make a hole in the newly installed waterproof sheet at the position corresponding to the long drain cylinder of the first modified drain, and the back of the newly installed waterproof sheet. A modified drain structure as shown in FIG. 6 is formed by welding to the flange-shaped member of the first modified drain.
［実施の形態３］
２重ドレイン構造を有する縦型改修ドレイン構造について説明する。
上述した図６に示すような改修ドレイン構造を形成した後に、続けて縦型改修ドレイン構造の第１の改修ドレインの長尺排水筒内に、第２の改修ドレインの長尺排水筒を差し込み、新設の熱可塑性樹脂製防水シート表面と第２の改修ドレインのツバ状部材とを溶着した図７のような構造である。この２重ドレイン構造は次回経年後の改修に備えるためのもので、次回の改修時に第２の改修ドレインのツバ状部材を残して長尺排水筒を切除すれば、ほぼ未使用の状態で第１の改修ドレインの長尺排水筒が現出し、第２の改修ドレインのツバ状部材表面の汚染又は劣化部分を溶剤等で取り除くなどの処理をすれば、再改修に使用する熱可塑性樹脂製防水シート裏面と溶着でき再改修のドレイン構造が容易に完成し大幅にコスト低減することができる。
[Embodiment 3]
A vertical modified drain structure having a double drain structure will be described.
After the modified drain structure as shown in FIG. 6 is formed, the elongated drainage cylinder of the second modified drain is inserted into the elongated drainage cylinder of the first modified drain of the vertical modified drain structure. FIG. 7 shows a structure as shown in FIG. 7 in which the surface of a new thermoplastic resin waterproof sheet and a flange-like member of the second repair drain are welded. This double drain structure is for refurbishment after the next aging. If the long drainage tube is cut away while leaving the collar member of the second refurbishment drain at the next refurbishment, the second drain structure is almost unused. If a long drainage pipe of 1 refurbished drain appears and the surface of the collar-like member of the 2nd refurbished drain is treated with a solvent, etc., it will be waterproofed by thermoplastic resin used for refurbishment. It can be welded to the backside of the sheet, and a refurbished drain structure can be easily completed, greatly reducing costs.
本発明によりドレイン改修時に、水密性の信頼性を高め、排水容量を確保し、部材が削減でき、作業工程を低減でき、コスト低減ができ、さらに再改修時の簡易化も図れるため、本発明の軟質熱可塑性樹脂製改修ドレイン及びドレイン構造は、建築物の屋上、ベランダ等の改修工事に広く利用することができる。 According to the present invention, at the time of drain refurbishment, the reliability of watertightness is increased, the drainage capacity is secured, the number of members can be reduced, the work process can be reduced, the cost can be reduced, and simplification at the time of refurbishment can be achieved. The soft thermoplastic resin repair drain and drain structure can be widely used for repair work on the rooftops, verandas, etc. of buildings.
１ 第１の軟質熱可塑性樹脂製縦型改修ドレイン
１ａ ツバ状部材
１ｂ 長尺排水筒
２ 第２の軟質熱可塑性樹脂製縦型改修ドレイン
２ａ ツバ状部材
２ｂ 長尺排水筒
３ 縦型改修ドレインのディッピング成形用金型
３ｃ 支持具
４ 新設の熱可塑性樹脂製防水シート
５ 従来の改修ドレイン
５ａ ツバ状部材
５ｂ 排水筒
６ ジャバラホース
Ａ 防水下地
Ｂ 既設ドレイン
Ｃ 既設防水シート
DESCRIPTION OF
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| Application Number | Priority Date | Filing Date | Title |
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| JP2008247558A JP2010077696A (en) | 2008-09-26 | 2008-09-26 | Repair drain made of soft thermoplastic resin, molding method of repair drain made of soft thermoplastic resin, and repair drain structure |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2008247558A JP2010077696A (en) | 2008-09-26 | 2008-09-26 | Repair drain made of soft thermoplastic resin, molding method of repair drain made of soft thermoplastic resin, and repair drain structure |
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| JP2010077696A true JP2010077696A (en) | 2010-04-08 |
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| JP2011058169A (en) * | 2009-09-07 | 2011-03-24 | Sumitomo Bakelite Co Ltd | Method for installing drain, and drain structure |
| JP2020090000A (en) * | 2018-12-04 | 2020-06-11 | タキロンシーアイ株式会社 | Three-dimensional structure and method of manufacturing the same |
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