JPH05131548A - Protective sheet for manufacturing conductor connecting section - Google Patents
Protective sheet for manufacturing conductor connecting sectionInfo
- Publication number
- JPH05131548A JPH05131548A JP29455391A JP29455391A JPH05131548A JP H05131548 A JPH05131548 A JP H05131548A JP 29455391 A JP29455391 A JP 29455391A JP 29455391 A JP29455391 A JP 29455391A JP H05131548 A JPH05131548 A JP H05131548A
- Authority
- JP
- Japan
- Prior art keywords
- material layer
- point material
- protective sheet
- melting
- conductor connecting
- 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.)
- Pending
Links
Landscapes
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、絶縁性及び防水性の高
い導体接続部を製造するための保護シートに係り、特に
超音波等の振動波により溶融、溶着することにより、導
体接続部を絶縁防水保護するための保護シートに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective sheet for producing a conductor connecting portion having a high insulating property and a high waterproof property, and in particular, the conductor connecting portion is melted and welded by a vibration wave such as an ultrasonic wave. The present invention relates to a protective sheet for insulation and waterproof protection.
【０００２】[0002]
【従来の技術】例えば絶縁被覆電線に他の電線を分岐接
続した場合、導体接続部を絶縁防水処理しなくてはなら
ない。従来、その方法として、特開平２−２１２１２５
号公報に示す方法が知られている。2. Description of the Related Art For example, when another wire is branched and connected to an insulation-coated wire, the conductor connecting portion must be subjected to insulation / waterproofing. Conventionally, as a method thereof, JP-A-2-212125
The method shown in Japanese Patent Publication is known.
【０００３】この方法は、絶縁被覆電線の被覆を剥いで
導体同士を接続し、この導体接続部分及びその近傍の絶
縁被覆層を上下両面から、表面にホットメルトを塗布し
た保護シートで挟み、この挟み込んだ部分のホットメル
トを超音波により溶融させてモールド絶縁層を形成す
る、というものである。この場合の保護シートは、高融
点材層（例えば塩化ビニルシート）の表面に低融点材層
（ホットメルト層）を形成した二層構造のものである。In this method, the insulation-coated electric wire is stripped off to connect the conductors to each other, and the conductor connection portion and the insulation-coating layers in the vicinity thereof are sandwiched from the upper and lower sides by a protective sheet having hot melt applied to the surface, The hot melt in the sandwiched portion is melted by ultrasonic waves to form a mold insulating layer. In this case, the protective sheet has a two-layer structure in which a low melting point material layer (hot melt layer) is formed on the surface of a high melting point material layer (for example, a vinyl chloride sheet).
【０００４】以下、この方法を図面を用いて具体的に説
明する。Hereinafter, this method will be specifically described with reference to the drawings.
【０００５】図６において、１は絶縁被覆電線であっ
て、まずその中間部の絶縁被覆層１ａを剥ぎ取って露出
した導体１ｂに、分岐線２の端末部の導体２ｂを導体ス
リーブ３によって圧着接続する。４は保護シートであっ
て、片面にホットメルト４ａを適宜の厚さに塗布した二
層構造を持つ。５及び６は一対の溶着用金型であって、
それぞれの対向する端面には導体接続部の絶縁保護形状
に対応する溶着溝５ａ、６ａが凹設されている。そし
て、下方の金型６には超音波ホーン７が装着されてい
る。この場合、例えば絶縁被覆電線１及び分岐線２がビ
ニルシース電線である場合には、保護シート４の高融点
材層の材料として同材質のビニルシート、またホットメ
ルト４ａとしてポリアミド系の接着剤を使用すればよ
い。In FIG. 6, reference numeral 1 denotes an insulation-coated electric wire. First, the insulation coating layer 1a in the middle portion is peeled off to expose the conductor 1b, and the conductor 2b at the end of the branch line 2 is crimped by a conductor sleeve 3. Connecting. Reference numeral 4 is a protective sheet, which has a two-layer structure in which hot melt 4a is applied on one surface to an appropriate thickness. 5 and 6 are a pair of welding molds,
Welding grooves 5a and 6a corresponding to the insulating protection shape of the conductor connecting portion are provided in the opposing end surfaces, respectively. An ultrasonic horn 7 is attached to the lower mold 6. In this case, for example, when the insulation-coated electric wire 1 and the branch wire 2 are vinyl sheath electric wires, a vinyl sheet of the same material is used as the high melting point material layer of the protective sheet 4, and a polyamide adhesive is used as the hot melt 4a. do it.
【０００６】絶縁被覆電線１と分岐線２の導体接続部分
Ｊを絶縁保護するには、下金型６の上に、ホットメルト
４ａを表にして保護シート４を載せ、その上に、導体接
続部分Ｊがちょうど溶着溝６ａに位置するように置い
て、もう一枚の保護シート４を重ねる。そして、導体接
続部分Ｊを上下両面からホットメルト４ａで挟み込んだ
状態にする。In order to insulate and protect the conductor connection portion J of the insulation-coated electric wire 1 and the branch line 2, the hot melt 4a is placed on the lower mold 6 and the protective sheet 4 is placed on the lower mold 6, and the conductor connection is made thereon. The portion J is placed so that it is located exactly in the welding groove 6a, and another protective sheet 4 is overlaid. Then, the conductor connecting portion J is sandwiched by the hot melt 4a from both upper and lower surfaces.
【０００７】次いで、図７に示すように上金型５を下降
させて、適宜圧力で加圧しながら超音波ホーン７により
超音波を発生させ、溶着溝５ａ、６ａ部分を超音波振動
させる。これにより、保護シート４のホットメルト４ａ
が振動による摩擦熱で溶融し、導体接続部分Ｊ、即ち露
出導体１ｂ、２ｂ、導体スリーブ３及び近傍の絶縁被覆
層１ａに密着し、冷却により図８、図９に示すようにモ
ールド絶縁層Ｒが形成され、導体接続部分Ｊへの外部か
らの水等の侵入が遮断される。Then, as shown in FIG. 7, the upper mold 5 is lowered, and ultrasonic waves are generated by the ultrasonic horn 7 while applying pressure with an appropriate pressure to ultrasonically vibrate the welding grooves 5a and 6a. Thereby, the hot melt 4a of the protective sheet 4
Melts due to frictional heat caused by vibration, and adheres to the conductor connecting portions J, that is, the exposed conductors 1b and 2b, the conductor sleeve 3, and the insulating coating layer 1a in the vicinity, and is cooled by the mold insulating layer R as shown in FIGS. Is formed, and the invasion of water or the like from the outside into the conductor connecting portion J is blocked.
【０００８】この場合、図６の例では、保護シート４と
して、平板状の高融点材層の表面にホットメルトを平坦
に塗布した構成のものを用いているが、図１０に示すよ
うに網目状にホットメルト４ａを適宜厚さに形成したも
のや、図１１に示すように凹凸状にホットメルト４ａを
形成したものを用いる場合もある。そうした場合には、
超音波エネルギーが網目状または凹凸状ホットメルトの
交点に集中し、ここから次第に他の部分に熱が伝わって
いくのでホットメルト４ａが完全に溶融する。また、超
音波で低融点材層を溶融させる方法以外に、高周波で低
融点材層を溶融させる方法もある。In this case, in the example of FIG. 6, as the protective sheet 4, a flat plate-like high melting point material layer having a structure in which hot melt is evenly applied is used, but as shown in FIG. In some cases, a hot melt 4a having a proper thickness is formed, or an uneven hot melt 4a is formed as shown in FIG. If you do,
The ultrasonic energy is concentrated at the intersections of the mesh-shaped or concave-convex hot melts, and the heat is gradually transferred to other portions from this, so that the hot melts 4a are completely melted. In addition to the method of melting the low melting point material layer with ultrasonic waves, there is a method of melting the low melting point material layer with high frequency.
【０００９】[0009]
【発明が解決しようとする課題】ところで、特に超音波
でホットメルト４ａを溶融させる場合には、電線１、２
と保護シート４間に作用する加圧力が溶融状態の良否に
影響する。By the way, especially when the hot melt 4a is melted by ultrasonic waves, the electric wires 1, 2
The pressing force acting between the protective sheet 4 and the protective sheet 4 affects the quality of the molten state.
【００１０】すなわち、超音波ホーン７から加工物に伝
達されるエネルギは一般に次の式で表わされる。That is, the energy transmitted from the ultrasonic horn 7 to the workpiece is generally represented by the following equation.
【００１１】パワー＝定数×圧力×周波数×振幅 したがって、同一条件の保護シート４を用いた場合に
は、電線サイズが大きく接続電線の本数が多いほど溶着
溝５ａ、６ａ内での上記加圧力が高くなるため溶融し過
ぎて焦げつきを起こしやすく、また反対に電線サイズが
小さく接続本数が少ないほど、溶融溝５ａ、６ａ内での
上記加圧力が低くなるため未溶融となり不完全モールド
となりやすかった。このように、従来の保護シート４
は、電線サイズや本数の組み合わせによって加圧力が変
わりやすいため、電線サイズや接続本数などによって、
ホットメルトの塗布量などを変えた複数種の保護シート
を用意する等の対策が必要であった。Power = constant × pressure × frequency × amplitude Therefore, when the protective sheet 4 under the same conditions is used, the above pressing force in the welding grooves 5a and 6a increases as the wire size increases and the number of connecting wires increases. Since it becomes higher, it is more likely to melt and cause charring, and conversely, as the wire size is smaller and the number of connections is smaller, the above-mentioned pressing force in the melting grooves 5a and 6a is lower and unmelting is likely to result in incomplete molding. In this way, the conventional protective sheet 4
Since the pressing force easily changes depending on the combination of the wire size and the number of wires,
It was necessary to take measures such as preparing multiple types of protective sheets with different amounts of hot melt applied.
【００１２】本発明は、そのような事情を考慮し、広い
範囲の電線サイズ、組み合わせに対応することのできる
保護シートを提供することを目的とする。In view of such circumstances, it is an object of the present invention to provide a protective sheet which can accommodate a wide range of wire sizes and combinations.
【００１３】[0013]
【課題を解決するための手段】本発明の保護シートは、
高融点材層の表面に低融点材層を形成したものであっ
て、低融点材層側を内側にして絶縁被覆電線の導体接続
部とその近傍の絶縁被覆層を上下両面から加圧して挟
み、その状態で超音波等の振動波により低融点材層を溶
融させてモールド絶縁層を形成するための導体接続部製
造用の保護シートにおいて、前記高融点材層の表面に多
数の可撓性突部を形成し、この表面の形状に沿って前記
低融点材層を形成したことを特徴としている。The protective sheet of the present invention comprises:
A low-melting-point material layer is formed on the surface of the high-melting-point material layer, and the low-melting-point material layer side is placed inside and the conductor connection part of the insulated wire and the insulating coating layer in the vicinity are pressed from above and below. In such a state, in a protective sheet for producing a conductor connecting portion for melting a low melting point material layer by a vibration wave such as ultrasonic waves to form a mold insulating layer, a large number of flexible materials are formed on the surface of the high melting point material layer. It is characterized in that a protrusion is formed and the low melting point material layer is formed along the shape of the surface.
【００１４】[0014]
【作用】本発明の保護シートを用いた場合、電線サイズ
や組み合わせが変わっても、可撓性突部がそれに応じて
変形（倒れたり圧縮したり）する。そして、突部の変形
により、保護シートと電線間に働く加圧力をある程度一
定に保って超音波条件を一定に保つ。When the protective sheet of the present invention is used, even if the electric wire size or combination is changed, the flexible projection is deformed (falls or compresses) accordingly. Then, due to the deformation of the protrusion, the pressure applied between the protective sheet and the electric wire is kept constant to some extent and the ultrasonic condition is kept constant.
【００１５】[0015]
【実施例】以下、本発明の一実施例を図面を参照しなが
ら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【００１６】図１は実施例の保護シート１０を示し、
（ａ）は高融点材層１０ａのみを示し、（ｂ）は高融点
材層１０ａの表面に低融点材層１０ｂを形成した保護シ
ート１０の断面を示している。FIG. 1 shows a protective sheet 10 of the embodiment,
(A) shows only the high melting point material layer 10a, (b) has shown the cross section of the protective sheet 10 which formed the low melting point material layer 10b on the surface of the high melting point material layer 10a.
【００１７】高融点材層１０ａは、軟質塩化ビニル樹脂
のような柔軟な材料を押し出し成形して得たもので、表
面に一定方向に延びる多数の可撓性突部として突条１１
を有している。各突条１１は先端に行くほど幅の狭まっ
た山形をなしており、所定の可撓性を有している。そし
て、この多数の突条１１を有した高融点材層１０ａの表
面に、その表面形状に沿ってホットメルト等の柔軟な材
料を塗布することにより、低融点材層１０ｂが形成され
ている。The high-melting-point material layer 10a is obtained by extruding a flexible material such as soft vinyl chloride resin, and has a ridge 11 as a large number of flexible projections extending in a certain direction on the surface.
have. Each of the ridges 11 has a mountain shape whose width becomes narrower toward the tip, and has a predetermined flexibility. The low melting point material layer 10b is formed by applying a soft material such as hot melt along the surface shape to the surface of the high melting point material layer 10a having the large number of protrusions 11.
【００１８】この保護シート１０を用いて導体接続部を
絶縁保護する場合は、図２に示すように金型溶着溝５
ａ、６ａに対し突条１１が直交するように保護シート１
０、１０を配設して、突条１１と電線１、２を直交させ
る。そして、従来同様に加圧した状態で振動波としての
超音波を発生させる。なお、振動波としては高周波を用
いることもできる。また、保護シート１０による挟み込
みは、一枚のシートを二つ折りにして行うこともでき
る。When the conductor connecting portion is insulated and protected by using this protective sheet 10, as shown in FIG.
Protective sheet 1 so that ridge 11 is orthogonal to a and 6a
0 and 10 are arranged so that the ridge 11 and the electric wires 1 and 2 are orthogonal to each other. Then, as in the conventional case, an ultrasonic wave as a vibration wave is generated in a pressurized state. A high frequency can be used as the vibration wave. The sandwiching with the protective sheet 10 can also be performed by folding one sheet in two.
【００１９】この際、保護シート１０の表面には可撓性
の突条１１が存在するので、図３に示すように、突条１
１が、挟み込んだ電線１のサイズに応じて撓み変形す
る。例えば、太い電線の場合は突条１１が大きく撓んで
逃げ、細い電線の場合は突条があまり撓まない。そし
て、突条１１の変形により、保護シート４と電線１間に
作用する加圧力がほぼ一定に保たれる。よって、電線サ
イズや組み合わせによらずに超音波条件をほぼ一定に保
つことができ、同一の保護シート１０により一定品質の
導体接続部を製造することができる。At this time, since the flexible ridges 11 are present on the surface of the protective sheet 10, as shown in FIG.
1 flexibly deforms in accordance with the size of the electric wire 1 sandwiched. For example, in the case of a thick electric wire, the ridge 11 largely bends and escapes, and in the case of a thin electric wire, the ridge does not bend so much. The deformation of the ridges 11 keeps the pressing force acting between the protective sheet 4 and the electric wire 1 substantially constant. Therefore, the ultrasonic conditions can be kept substantially constant regardless of the size and combination of the electric wires, and the same protective sheet 10 can be used to manufacture a conductor connection part of constant quality.
【００２０】また、図４に示すように、太い電線１、２
の場合（ａ）も、細い電線１、２の場合（ｂ）も、可撓
性の突条１１（図１〜図３参照）が電線に押されて電線
形状になじむため、低融点材層１０ｂが電線サイズに応
じて良く充填される上、突条１１を除いた高融点材層１
０ａの厚さが従来と同じであるとすれば高融点材層１０
ａが突条１１（図１〜図３参照）の高さに応じて厚く形
成される。よって、圧着端子の絶縁シート破れによるリ
ークを効果的に防止することができる。Further, as shown in FIG. 4, thick electric wires 1, 2
In both the case (a) and the case of the thin electric wires 1 and 2 (b), the flexible ridge 11 (see FIGS. 1 to 3) is pushed by the electric wire and conforms to the electric wire shape. 10b is well filled according to the wire size, and the high melting point material layer 1 excluding the protrusions 11
If the thickness of 0a is the same as the conventional one, the high melting point material layer 10
a is formed thick according to the height of the protrusion 11 (see FIGS. 1 to 3). Therefore, it is possible to effectively prevent the leak due to the breakage of the insulating sheet of the crimp terminal.
【００２１】なお、突条１１の高さを高くした場合は、
肉厚が増えて保護シート１０全体の可撓性が減少するの
で、その場合は、図５に示すように、高融点材層１０ａ
の裏面側に切込み１４を入れて柔軟性を確保することが
望ましい。When the height of the ridge 11 is increased,
Since the wall thickness increases and the flexibility of the entire protective sheet 10 decreases, in that case, as shown in FIG. 5, the high melting point material layer 10a is formed.
It is desirable to make a notch 14 on the back surface side to secure the flexibility.
【００２２】また、上記実施例においては、高融点材層
１０ａの表面に突条１１を形成した場合を示したが、多
数の点状の突起を形成して、その表面形状に沿って低融
点材層を形成してもよい。In the above embodiment, the case where the ridges 11 are formed on the surface of the high melting point material layer 10a is shown. However, a large number of point-like projections are formed and the low melting point is formed along the surface shape. A material layer may be formed.
【００２３】[0023]
【発明の効果】以上説明したように、本発明の保護シー
トを用いた場合、電線サイズや組み合わせが変わって
も、可撓性突部が撓むことにより電線と保護シート間の
加圧力をほぼ一定に保って超音波条件を一定に保つこと
ができる。したがって、一種類の保護シートで、広い範
囲の電線サイズ、組み合わせに対応することができる。
また、可撓性突部が電線に押されて電線形状になじむた
め、低融点材が電線間に良く浸透しシール性が向上す
る。As described above, when the protective sheet of the present invention is used, even if the electric wire size or combination is changed, the flexible protruding portion bends so that the pressing force between the electric wire and the protective sheet is almost eliminated. The ultrasonic conditions can be kept constant by keeping them constant. Therefore, a single type of protective sheet can accommodate a wide range of wire sizes and combinations.
Further, since the flexible protrusion is pushed by the electric wire and conforms to the electric wire shape, the low melting point material penetrates well between the electric wires and the sealing property is improved.
【図１】本発明の一実施例の保護シートを示し、（ａ）
は高融点材層の表面形状を示す図、（ｂ）は高融点材層
の表面に低融点材層を形成した保護シートの断面図であ
る。FIG. 1 shows a protective sheet of one embodiment of the present invention, (a)
FIG. 3B is a diagram showing the surface shape of the high melting point material layer, and FIG. 6B is a cross-sectional view of the protective sheet in which the low melting point material layer is formed on the surface of the high melting point material layer.
【図２】上記実施例の保護シート１０を用いて導体接続
部を製造する場合の説明図である。FIG. 2 is an explanatory diagram of a case where a conductor connecting portion is manufactured using the protective sheet 10 of the above embodiment.
【図３】上記実施例の保護シートの作用の説明図であ
る。FIG. 3 is an explanatory view of the action of the protective sheet of the above embodiment.
【図４】上記実施例の保護シートを用いて製造した導体
接続部の断面図であり、（ａ）は太い電線の場合、
（ｂ）は細い電線の場合を示す。FIG. 4 is a cross-sectional view of a conductor connecting portion manufactured using the protective sheet of the above-mentioned example, (a) is a thick electric wire,
(B) shows the case of a thin electric wire.
【図５】本発明の他の実施例の保護シートの部分詳細図
である。FIG. 5 is a partial detailed view of a protective sheet according to another embodiment of the present invention.
【図６】従来の導体接続部の製造方法の説明図である。FIG. 6 is an explanatory view of a conventional method for manufacturing a conductor connecting portion.
【図７】同製造方法の図６の次の工程の説明図である。FIG. 7 is an explanatory diagram of a step subsequent to FIG. 6 of the manufacturing method.
【図８】上記方法により製造した導体接続部の外観図で
ある。FIG. 8 is an external view of a conductor connecting portion manufactured by the above method.
【図９】同接続部の断面図である。FIG. 9 is a sectional view of the connecting portion.
【図１０】他の構成の保護シートを用いた導体接続部の
製造方法の説明図である。FIG. 10 is an explanatory diagram of a method for manufacturing a conductor connecting portion using a protective sheet having another configuration.
【図１１】さらに他の構成の保護シートを用いた導体接
続部の製造方法の説明図である。FIG. 11 is an explanatory diagram of a method for manufacturing a conductor connecting portion using a protective sheet having another configuration.
１，２ 電線 ５、６金型 ５ａ，６ａ 溶着溝 ７ 超音波ホーン １０ 保護シート １０ａ 高融点材層 １０ｂ 低融点材層 １１ 突条（可撓性突部） 1 and 2 electric wires 5 and 6 molds 5a and 6a welding groove 7 ultrasonic horn 10 protective sheet 10a high melting point material layer 10b low melting point material layer 11 ridge (flexible protrusion)
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０１Ｒ 43/01 Ａ 7161−5Ｅ // Ｂ２９Ｌ 7:00 4Ｆ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location H01R 43/01 A 7161-5E // B29L 7:00 4F
Claims (1)
た保護シートであって、低融点材層側を内側にして絶縁
被覆電線の導体接続部とその近傍の絶縁被覆層を上下両
面から加圧して挟み、その状態で超音波等の振動波によ
り低融点材層を溶融させてモールド絶縁層を形成するた
めの導体接続部製造用の保護シートにおいて、前記高融
点材層の表面に多数の可撓性突部を形成し、この表面の
形状に沿って前記低融点材層を形成したことを特徴とす
る導体接続部製造用の保護シート。1. A protective sheet having a low-melting-point material layer formed on the surface of a high-melting-point material layer, wherein the low-melting-point material layer side is the inner side, and the conductor connection part of the insulated wire and the insulating coating layer in the vicinity thereof are vertically arranged. The surface of the high-melting-point material layer in the protective sheet for manufacturing a conductor connecting portion for forming the mold insulating layer by melting the low-melting-point material layer by vibration waves such as ultrasonic waves while sandwiching by pressing from both sides. A protective sheet for producing a conductor connecting portion, characterized in that a large number of flexible protrusions are formed on the surface of the sheet, and the low melting point material layer is formed along the shape of the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29455391A JPH05131548A (en) | 1991-11-11 | 1991-11-11 | Protective sheet for manufacturing conductor connecting section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29455391A JPH05131548A (en) | 1991-11-11 | 1991-11-11 | Protective sheet for manufacturing conductor connecting section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05131548A true JPH05131548A (en) | 1993-05-28 |
Family
ID=17809284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29455391A Pending JPH05131548A (en) | 1991-11-11 | 1991-11-11 | Protective sheet for manufacturing conductor connecting section |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05131548A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2823535A4 (en) * | 2012-03-08 | 2015-07-29 | 3M Innovative Properties Co | Insulating and waterproofing member and insulating and waterproofing method |
-
1991
- 1991-11-11 JP JP29455391A patent/JPH05131548A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2823535A4 (en) * | 2012-03-08 | 2015-07-29 | 3M Innovative Properties Co | Insulating and waterproofing member and insulating and waterproofing method |
| US9502879B2 (en) | 2012-03-08 | 2016-11-22 | 3M Innovative Properties Company | Insulation waterproof member and insulation waterproofing method |
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