JP6433698B2 - Bath lid - Google Patents

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JP6433698B2
JP6433698B2 JP2014136516A JP2014136516A JP6433698B2 JP 6433698 B2 JP6433698 B2 JP 6433698B2 JP 2014136516 A JP2014136516 A JP 2014136516A JP 2014136516 A JP2014136516 A JP 2014136516A JP 6433698 B2 JP6433698 B2 JP 6433698B2
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molding
lid
edge
reinforcing
surface plate
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遠藤　直樹
直樹 遠藤
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多田プラスチック工業株式会社
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本発明は、風呂蓋に関する。   The present invention relates to a bath lid.

従来、２枚又は３枚の蓋体から成る組合せ式の風呂蓋は、蓋体の上面材と下面材との温度差に起因して面膨張による反りが生じ、蓋体の周縁部と浴槽との間に隙間が形成され易く、浴槽内の熱気が漏れたり、保温効果が低下するという欠点があった。また、子供や高齢者が不意に風呂蓋の上に手を突いた場合であっても、風呂蓋が折れ曲がって浴槽内に落ちることのないように、ある程度の大きさの上からの荷重に耐え得る強度と剛性が必要であった。
そこで、蓋体の周縁部に硬質樹脂から成る補強部材が付設され、補強部材を包み込むように軟質樹脂から成るエッジプロテクタを被覆した風呂蓋が提案されている（特許文献１参照）。 Conventionally, a combination type bath lid composed of two or three lids is warped due to surface expansion due to a temperature difference between the upper surface material and the lower surface material of the lid, and the peripheral edge of the lid and the bathtub There is a drawback that a gap is easily formed between the two, and hot air in the bathtub leaks or the heat retaining effect is lowered. Also, even if a child or an elderly person suddenly pokes on the bath lid, it can withstand a certain amount of load from the top so that the bath lid does not bend and fall into the bathtub. The strength and rigidity to obtain were necessary.
In view of this, there has been proposed a bath lid in which a reinforcing member made of a hard resin is attached to the peripheral portion of the lid, and an edge protector made of a soft resin is covered so as to wrap the reinforcing member (see Patent Document 1).

特開平０８−２７５８９１号公報JP 08-275891 A

特許文献１記載の風呂蓋のように、蓋体の周縁部を硬質樹脂で補強して、曲げモーメント（bending moment）に対する強度を向上することが、蓋体の反りを抑制し、かつ、荷重に対する耐久性を高めるために有効であるが、しかし、蓋体の周縁部の全周の強度を高めようとすると、硬質樹脂の補強部材に係る材料費が増大してコスト高になると共に、風呂蓋の重量が増大するという欠点があった。   Like the bath lid described in Patent Document 1, reinforcing the peripheral edge of the lid with a hard resin to improve the strength against bending moment suppresses the warpage of the lid and against the load. It is effective to increase the durability, but if the strength of the entire periphery of the peripheral part of the lid is increased, the material cost related to the reinforcing member of the hard resin increases and the cost increases. There is a disadvantage that the weight of the resin increases.

一般的に、組合せ式の風呂蓋は、２枚又は３枚の蓋体を並べて浴槽の上に置いた施蓋使用状態に於て、浴槽を横切る位置に合せ目が形成され、この合せ目以外の蓋体の周縁部は浴槽の縁の上に載置される。即ち、蓋体の周縁部の内で、合せ目の箇所が浴槽の湯の熱で温められて、上面と下面の温度差が最も生じ易く、また、上からの荷重に対して、下方に支える物が無い（宙に浮いている）合せ目の箇所に応力（ストレス）が集中し、折れ曲がる危険性が最も高いことがわかった。   In general, a combination type bath lid has a seam formed at the position across the bathtub when the lid is used with two or three lids arranged side by side on the bathtub. The peripheral edge of the lid is placed on the edge of the bathtub. That is, in the peripheral part of the lid, the seam is heated by the hot water of the bathtub, so that the temperature difference between the upper surface and the lower surface is most likely to occur, and is supported downward against the load from above. It was found that stress is concentrated at the joint where there is no object (floating in the air), and the risk of bending is highest.

そこで、本発明は、上面と下面の温度差による反りが最も生じ易く、折れ曲がる危険性が最も高い箇所を補強した風呂蓋を提供することを目的とする。   Accordingly, an object of the present invention is to provide a bath lid that reinforces a portion that is most likely to warp due to a temperature difference between the upper surface and the lower surface and that has the highest risk of bending.

本発明に係る風呂蓋は、２枚又は３枚の蓋単体から構成され、施蓋使用状態で、浴槽を横切る位置に合せ目を形成する合せ辺部の強度を、全周縁部から上記合せ辺部を除いた残縁部の強度よりも、高く設定した風呂蓋であって、上記蓋単体は、上面板と発泡樹脂層と下面板とが順次積層一体化され、上記合せ辺部に沿って固着される第１モールと、上記残縁部に沿って固着される第２モールと、を備え、上記第１モールと上記第２モールは、軟質樹脂から成る外観形状同一の横断面コ字状端縁被覆部を有し、上記第１モールは、上記端縁被覆部の鉛直壁部の内面に一体押出成形された硬質樹脂から成る補強部を有し、上記補強部は、横断面矩形状であって、上記鉛直壁部との結合部近傍に上下一対の凹部を有すると共に、内部に中空部を有するものである。 The bath lid according to the present invention is composed of two or three lids alone, and in the use state of the lid, the strength of the mating side portion forming the seam at the position crossing the bathtub is measured from the entire peripheral portion to the mating side. The bath lid is set higher than the strength of the remaining edge portion excluding the portion, and the lid unit is formed by sequentially laminating and integrating the upper surface plate, the foamed resin layer, and the lower surface plate, along the mating side portion. A first molding to be fixed and a second molding to be fixed along the remaining edge portion, and the first molding and the second molding have a U-shaped cross section having the same external shape made of a soft resin. The first molding has a reinforcing portion made of a hard resin integrally formed on the inner surface of the vertical wall portion of the edge covering portion, and the reinforcing portion has a rectangular cross section. And having a pair of upper and lower recesses in the vicinity of the joint with the vertical wall, and having a hollow inside. It is intended.

また、上記補強部の上記中空部は、横断面円形乃至楕円形状である。 The hollow portion of the reinforcing portion has a circular or elliptical cross section .

本発明の風呂蓋によれば、２枚又は３枚の蓋単体の合せ目を形成する合せ辺部のみを補強して、反りを抑制し、かつ、上からの荷重に対する強度（耐久性）を効率よく向上できる。全体を軽量化でき、安価に製造することができる。   According to the bath lid of the present invention, only the joint side portion forming the joint of the two or three lids alone is reinforced, the warpage is suppressed, and the strength (durability) against the load from above is increased. It can be improved efficiently. The whole can be reduced in weight and manufactured at low cost.

本発明の風呂蓋の施蓋使用状態を示した正面図である。It is the front view which showed the cover use condition of the bath lid of this invention. 本発明の風呂蓋の施蓋使用状態を示した平面図である。It is the top view which showed the cover use condition of the bath lid of this invention. 図２のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図２のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 本発明の変形例を示した断面図であり（Ａ）は他の実施形態の断面図であり、（Ｂ）は別の実施形態の断面図であり、（Ｃ）はさらに別の実施形態の断面図である。It is sectional drawing which showed the modification of this invention, (A) is sectional drawing of other embodiment, (B) is sectional drawing of another embodiment, (C) is another embodiment. It is sectional drawing.

以下、実施の形態を示す図面に基づき本発明を詳説する。
図１と図２に示すように、本発明の風呂蓋は、２枚の蓋単体Ｆ，Ｆから構成された組合せ式の風呂蓋であって、施蓋使用状態で、浴槽Ｂの中央を横切る位置に合せ目１０を形成するよう浴槽Ｂの上に並べて置かれる。本発明に於て、蓋単体Ｆの全周縁部の内、合せ目１０を形成する箇所を合せ辺部４とし、全周縁部から合せ辺部４を除いた箇所を残縁部３とする。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
As shown in FIGS. 1 and 2, the bath lid of the present invention is a combined bath lid composed of two lid bodies F and F, and crosses the center of the bathtub B when the lid is used. Placed side by side on the tub B to form a seam 10 in position. In the present invention, a portion where the joint 10 is formed in the entire peripheral edge portion of the single lid F is referred to as a matching edge portion 4, and a portion obtained by removing the matching edge portion 4 from the entire peripheral edge is referred to as a remaining edge portion 3.

図３と図４に示すように、蓋単体Ｆは、上面板１１と発泡樹脂層１２と下面板１３とが順次積層一体化され、合せ辺部４に沿って固着される第１モール１と、残縁部３に沿って固着される第２モール２とを、備えている。
上面板１１は、軟質で、かつ、伸縮（ストレッチ）性のある素材から成り、例えば、ＰＶＣやゴム、又は、その発泡体が用いられる。下面板１３は、硬質樹脂から成り、例えば、ＰＰ、ＰＥ、ＡＢＳや、その複合体が用いられる。発泡樹脂層１２は、例えば、発泡ＰＵ（ポリウレタン）から成り、上面板１１と下面板１３と第１モール１と第２モール２によって囲まれた空間に、ウレタン樹脂を注入し、発泡・固化して形成されている。上面板１１を軟質素材とし下面板１３を硬質素材としたことで、浴槽内の湯温による下面板１３の面膨張を緩和させ、蓋単体Ｆの反りを抑制している。また、蓋単体Ｆ全体を軽量化できる利点もある。 As shown in FIGS. 3 and 4, the lid unit F includes a first molding 1 in which an upper surface plate 11, a foamed resin layer 12, and a lower surface plate 13 are sequentially stacked and integrated, and fixed along the mating side portion 4. The second molding 2 fixed along the remaining edge 3 is provided.
The upper surface plate 11 is made of a soft and stretchable material, and for example, PVC, rubber, or a foam thereof is used. The lower surface plate 13 is made of a hard resin, and for example, PP, PE, ABS, or a composite thereof is used. The foamed resin layer 12 is made of, for example, foamed PU (polyurethane), and injects urethane resin into a space surrounded by the upper surface plate 11, the lower surface plate 13, the first molding 1 and the second molding 2, and foams and solidifies. Is formed. Since the upper surface plate 11 is made of a soft material and the lower surface plate 13 is made of a hard material, the surface expansion of the lower surface plate 13 due to the hot water temperature in the bathtub is alleviated, and the warpage of the cover unit F is suppressed. Further, there is an advantage that the entire lid F can be reduced in weight.

図３に示すように、第１モール１は、軟質樹脂から成る横断面コ字状端縁被覆部６を有し、かつ、軟質樹脂の端縁被覆部６の内面６ａに一体押出成形された硬質樹脂から成る補強部９を有している。硬質樹脂から成る補強部９を有する第１モール１を付設することで、合せ辺部４の強度と剛性を向上させている。
端縁被覆部６は、蓋単体Ｆの側面を被覆する鉛直壁部２１と、鉛直壁部２１の上下両端部に連設される外嵌状突片部２２，２２とを有している。
補強部９は、ＡＢＳ、ＰＰ、ＰＣ等から成り、あるいは、これらの硬質樹脂に強化材として、ガラスやタルク材（ケイ酸マグネシウム等）を混入するも好ましい。硬質の補強部９は、ポリオレフィン系のエラストマーから成る軟質の端縁被覆部６と共に、同時押出成形によって形成されている。なお、本発明に於て、同時押出成形とは、成形冷却後の硬度等の特性が異なる材料を同時に押出して一体化する成形であって、２色押出成形と呼ばれることもある。このように、端縁被覆部６と補強部９を一体押出成形することで、接着等の加工工程を省くことができる。また、補強部９は、断面円形状の中空部９Ａを内部に有し、鉛直方向からの荷重による曲げモーメント（bending moment）に対し強い構造となっている。 As shown in FIG. 3, the first molding 1 has a U-shaped edge covering portion 6 made of a soft resin and is integrally extruded on the inner surface 6a of the edge covering portion 6 of the soft resin. It has a reinforcing part 9 made of hard resin. By attaching the first molding 1 having the reinforcing portion 9 made of hard resin, the strength and rigidity of the mating side portion 4 are improved.
The edge covering portion 6 includes a vertical wall portion 21 that covers the side surface of the cover unit F, and external fitting-like projecting piece portions 22 and 22 that are connected to upper and lower end portions of the vertical wall portion 21.
The reinforcing portion 9 is made of ABS, PP, PC, or the like, or it is also preferable to mix glass or talc material (magnesium silicate, etc.) as a reinforcing material in these hard resins. The hard reinforcing portion 9 is formed by coextrusion molding together with the soft edge covering portion 6 made of polyolefin elastomer. In the present invention, the coextrusion molding is molding in which materials having different properties such as hardness after molding cooling are simultaneously extruded and integrated, and is sometimes called two-color extrusion molding. In this way, by integrally extruding the edge covering portion 6 and the reinforcing portion 9, a processing step such as adhesion can be omitted. The reinforcing part 9 has a hollow part 9A having a circular cross section inside, and has a structure strong against a bending moment caused by a load from the vertical direction.

補強部９は、端縁被覆部６（鉛直壁部２１）の内面に連結一体化されており、補強部９と鉛直壁部２１との結合部近傍には、凹部１５，１５が形成されている。発泡樹脂層１２が形成される際、注入されたウレタン樹脂は、発泡しつつ、補強部９と上面板１１・下面板１３の隙間から凹部１５，１５に充填され、加熱により十分に固化して、上面板１１、下面板１３、鉛直壁部２１の内面、及び、補強部９の外面に、強く接着する。即ち、発泡樹脂層１２は、上面板１１と下面板１３と第１モール１（端縁被覆部６と補強部９）に接着固化し、かつ、凹部１５，１５に充填され固化することで、第１モール１を抜止めして固着一体化している。   The reinforcing portion 9 is connected and integrated with the inner surface of the edge covering portion 6 (vertical wall portion 21), and concave portions 15 and 15 are formed in the vicinity of the joint portion between the reinforcing portion 9 and the vertical wall portion 21. Yes. When the foamed resin layer 12 is formed, the injected urethane resin is filled in the recesses 15 and 15 from the gap between the reinforcing portion 9 and the upper surface plate 11 and the lower surface plate 13 while foaming, and is sufficiently solidified by heating. The upper plate 11, the lower plate 13, the inner surface of the vertical wall portion 21, and the outer surface of the reinforcing portion 9 are strongly bonded. That is, the foamed resin layer 12 is bonded and solidified to the upper surface plate 11, the lower surface plate 13, and the first molding 1 (the edge covering portion 6 and the reinforcing portion 9), and filled into the concave portions 15 and 15 to be solidified. The first molding 1 is secured and integrated.

一方、図４に示すように、第２モール２は、第１モール１と外観形状同一の軟質樹脂から成る横断面コ字状端縁被覆部６を有し、鉛直壁部２１の上下両端部の各々に、上面板１１・下面板１３の周端縁１１ａ，１３ａを差込む凹溝を形成する差込部８，８を有している。差込部８は、鉛直壁部２１の上下両端部に連設される一対の外嵌状突片部２２と内嵌状突片部２３から成る。
つまり、図３と図４に示すように、第１モール１が固着された合せ辺部４と、第２モール２が固着された残縁部３とは、外観上は軟質の端縁被覆部６で覆われて見た目が全く同じであるが、合せ辺部４については、曲げモーメント（bending moment）に対する強度が、（全周縁部から合せ辺部４を除いた）残縁部３の強度よりも、高く設定されているのである。 On the other hand, as shown in FIG. 4, the second molding 2 has a U-shaped edge covering portion 6 made of a soft resin having the same appearance as that of the first molding 1, and upper and lower end portions of the vertical wall portion 21. Are provided with insertion portions 8 and 8 for forming concave grooves into which the peripheral edges 11a and 13a of the upper surface plate 11 and the lower surface plate 13 are inserted. The insertion portion 8 is composed of a pair of externally fitting protruding piece portions 22 and an internally fitting protruding piece portion 23 that are connected to both upper and lower ends of the vertical wall portion 21.
That is, as shown in FIG. 3 and FIG. 4, the matching side portion 4 to which the first molding 1 is fixed and the remaining edge portion 3 to which the second molding 2 is fixed are, in terms of appearance, a soft edge covering portion. 6 is exactly the same in appearance, but with respect to the mating edge 4, the strength against the bending moment is greater than the strength of the remaining edge 3 (excluding the mating edge 4 from the entire periphery). Is set too high.

また、図３に示す合せ辺部４，４では、補強部９が上面板１１と下面板１３の間に装入され、発泡樹脂層１２にて包囲状として接着固化されている為、第１モール１が、上面板１１と発泡樹脂層１２と下面板１３に確実に固着一体化され、安定した補強効果が期待できる。
また、補強部９の形状は、自由度が高く、例えば、図５（Ａ）に示すように、断面楕円形状の中空部９Ａ，９Ａを２個有している構造であって良い。曲げモーメント（bending moment）に対する強度という点では、中空部９Ａが円形状乃至楕円形状であるのが好ましいが、図５（Ｂ）に示すように、断面三角形状の中空部９Ａ，９Ａを２個組み合わせた構造としても良く、あるいは、図５（Ｃ）のように、断面三角形状の比較的小さな中空部９Ａ，９Ａ，９Ａ，９Ａを複数個（２個以上）組み合わせた構造としても良い。 Further, in the mating side portions 4 and 4 shown in FIG. 3, the reinforcing portion 9 is inserted between the upper surface plate 11 and the lower surface plate 13 and is bonded and solidified as a surrounding shape by the foamed resin layer 12. The molding 1 is securely fixed and integrated with the upper surface plate 11, the foamed resin layer 12, and the lower surface plate 13, and a stable reinforcing effect can be expected.
Moreover, the shape of the reinforcement part 9 has a high freedom degree, for example, as shown to FIG. 5 (A), may have the structure which has two hollow parts 9A and 9A of an elliptical cross section. In terms of strength against bending moment, the hollow portion 9A is preferably circular or elliptical, but as shown in FIG. 5B, two hollow portions 9A, 9A having a triangular cross section are provided. A combined structure may be used, or a structure in which a plurality of (two or more) hollow portions 9A, 9A, 9A, 9A having a triangular cross section are combined as shown in FIG. 5C may be used.

図示省略するが、蓋単体Ｆが３枚の場合は、施蓋使用状態で、浴槽Ｂを横切る位置に２つの合せ目１０，１０が形成される。即ち、３枚の内の中間位置の蓋単体Ｆは矩形状であって、矩形状蓋単体Ｆの４辺の内、合せ目１０，１０を形成する平行な２辺に合せ辺部４，４を有し、合せ辺部４，４を除く残り２辺が残縁部３，３として形成されている。上述の構成と同様にして、合せ辺部４，４の強度を、合せ辺部４，４を除いた残縁部３，３の強度よりも、高く設定している。   Although illustration is omitted, when there are three lids F, two seams 10 and 10 are formed at positions crossing the bathtub B in a state where the lid is used. That is, the lid unit F at the intermediate position among the three sheets has a rectangular shape, and of the four sides of the rectangular lid unit F, two parallel sides forming the joints 10 and 10 are aligned with the side portions 4 and 4. The remaining two sides excluding the matching side portions 4 and 4 are formed as the remaining edge portions 3 and 3. In the same manner as the above-described configuration, the strength of the mating side portions 4 and 4 is set higher than the strength of the remaining edge portions 3 and 3 excluding the mating side portions 4 and 4.

なお、本発明は、設計変更可能であって、上面板１１と下面板１３は、同じ素材で構成されていても良い。また、第１モール１の端縁被覆部６が、上面板１１・下面板１３の周端縁１１ａ，１３ａを差込む凹溝を形成する差込部８を有する形状であっても良く、端縁被覆部６の形状は、本発明の主旨を逸脱しない範囲で自由に設計変更可能であるものとする。   The design of the present invention can be changed, and the upper surface plate 11 and the lower surface plate 13 may be made of the same material. Moreover, the shape which has the insertion part 8 which forms the ditch | groove which inserts the peripheral edge 11a, 13a of the upper surface board 11 and the lower surface board 13 may be sufficient as the edge covering part 6 of the 1st mall 1, The shape of the edge covering portion 6 can be freely changed in design without departing from the gist of the present invention.

以上のように、本発明に係る風呂蓋は、２枚又は３枚の蓋単体Ｆから構成され、施蓋使用状態で、浴槽Ｂを横切る位置に合せ目１０を形成する合せ辺部４，４の強度を、全周縁部から合せ辺部４を除いた残縁部３の強度よりも、高く設定したので、２枚又は３枚の蓋単体Ｆの合せ目１０を形成する合せ辺部４のみを補強して、反りを抑制でき、かつ、上からの荷重に対する強度（耐久性）を効率よく向上できる。全体を軽量化でき、安価に製造することができる。   As described above, the bath lid according to the present invention is composed of two or three lid bodies F, and the mating side portions 4 and 4 that form the seam 10 at a position across the bathtub B when the lid is used. Is set to be higher than the strength of the remaining edge 3 excluding the mating edge 4 from the entire peripheral edge, so that only the mating edge 4 forming the joint 10 of the two or three lid bodies F is provided. The warp can be suppressed and the strength (durability) against the load from above can be improved efficiently. The whole can be reduced in weight and manufactured at low cost.

また、合せ辺部４に沿って固着される第１モール１と、残縁部３に沿って固着される第２モール２とを、備え、第１モール１と第２モール２は、軟質樹脂から成る外観形状同一の横断面コ字状端縁被覆部６を有し、かつ、第１モール１は、軟質樹脂の端縁被覆部６の内面６ａに一体押出成形された硬質樹脂から成る補強部９を有するので、外観上は全周縁部が同じ見た目に形成され、全体としての体裁が良く、かつ、補強部９により合せ辺部４を補強できる。第１モール１の端縁被覆部６と補強部９を一体押出成形することで、接着等の加工工程を省くことができ、安価に製造できる。   Moreover, the 1st molding 1 fixed along the alignment side part 4 and the 2nd molding 2 fixed along the remaining edge part 3 are provided, and the 1st molding 1 and the 2nd molding 2 are soft resin. The first molding 1 is reinforced with a hard resin integrally extruded on the inner surface 6a of the edge covering portion 6 made of soft resin. Since the portion 9 is provided, the entire peripheral edge portion is formed with the same appearance in appearance, the overall appearance is good, and the mating side portion 4 can be reinforced by the reinforcing portion 9. By integrally extruding the edge covering portion 6 and the reinforcing portion 9 of the first molding 1, processing steps such as adhesion can be omitted, and manufacturing can be performed at low cost.

１ 第１モール
２ 第２モール
３ 残縁部
４ 合せ辺部
６ 端縁被覆部
６ａ 内面
９ 補強部
９Ａ 中空部
１０ 合せ目
１１ 上面板
１２ 発泡樹脂層
１３ 下面板
１５ 凹部
２１ 鉛直壁部
Ｆ 蓋単体
Ｂ 浴槽 DESCRIPTION OF SYMBOLS 1 1st molding 2 2nd molding 3 Remaining edge part 4 Alignment edge part 6 Edge covering part 6a Inner surface 9 Reinforcement part
9A hollow part 10 seam
11 top plate
12 foamed resin layer
13 bottom plate
15 recesses
21 Vertical wall part F Lid alone B Bathtub

Claims (2)

２枚又は３枚の蓋単体（Ｆ）から構成され、施蓋使用状態で、浴槽（Ｂ）を横切る位置に合せ目（１０）を形成する合せ辺部（４）（４）の強度を、全周縁部から上記合せ辺部（４）を除いた残縁部（３）の強度よりも、高く設定した風呂蓋であって、
上記蓋単体（Ｆ）は、上面板（１１）と発泡樹脂層（１２）と下面板（１３）とが順次積層一体化され、上記合せ辺部（４）に沿って固着される第１モール（１）と、上記残縁部（３）に沿って固着される第２モール（２）と、を備え、
上記第１モール（１）と上記第２モール（２）は、軟質樹脂から成る外観形状同一の横断面コ字状端縁被覆部（６）を有し、
上記第１モール（１）は、上記端縁被覆部（６）の鉛直壁部（２１）の内面（６ａ）に一体押出成形された硬質樹脂から成る補強部（９）を有し、
上記補強部（９）は、横断面矩形状であって、上記鉛直壁部（２１）との結合部近傍に上下一対の凹部（１５）（１５）を有すると共に、内部に中空部（９Ａ）を有することを特徴とする風呂蓋。 Consists of two or three lids alone (F), and the strength of the mating sides (4) and (4) forming the seam (10) at the position crossing the bathtub (B) when using the lid, It is a bath lid set higher than the strength of the remaining edge part (3) excluding the mating side part (4) from the entire peripheral part ,
The lid single body (F) includes a first molding in which an upper surface plate (11), a foamed resin layer (12), and a lower surface plate (13) are laminated and integrated sequentially, and are fixed along the mating side portion (4). (1) and a second molding (2) fixed along the remaining edge (3),
The first molding (1) and the second molding (2) have a U-shaped edge covering portion (6) having the same outer cross-sectional shape made of a soft resin,
The first molding (1) has a reinforcing part (9) made of a hard resin integrally extruded on the inner surface (6a) of the vertical wall part (21) of the edge covering part (6),
The reinforcing portion (9) has a rectangular cross section and has a pair of upper and lower concave portions (15) (15) in the vicinity of the connecting portion with the vertical wall portion (21), and a hollow portion (9A) inside. bath lid and having a. 上記補強部（９）の上記中空部（９Ａ）は、横断面円形乃至楕円形状である請求項１記載の風呂蓋。 The bath lid according to claim 1 , wherein the hollow portion (9A) of the reinforcing portion (9) has a circular or elliptical cross section.
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* Cited by examiner, † Cited by third party
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JPH08103389A (en) * 1994-10-03 1996-04-23 Toto Ltd Lid for bathtub
JP4593550B2 (en) * 2006-11-09 2010-12-08 多田プラスチック工業株式会社 Bath lid
US20080184476A1 (en) * 2007-02-07 2008-08-07 Eric Albert Tub Cover Lifting and Stowing Device

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