JP5470958B2 - toilet seat - Google Patents

toilet seat Download PDF

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Publication number
JP5470958B2
JP5470958B2 JP2009074117A JP2009074117A JP5470958B2 JP 5470958 B2 JP5470958 B2 JP 5470958B2 JP 2009074117 A JP2009074117 A JP 2009074117A JP 2009074117 A JP2009074117 A JP 2009074117A JP 5470958 B2 JP5470958 B2 JP 5470958B2
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bottom plate
plate
outer peripheral
peripheral edge
welding
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JP2010220954A (en
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正 冨田
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Aisin Corp
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Aisin Seiki Co Ltd
Aisin Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B29C65/0609—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding characterised by the movement of the parts to be joined
    • B29C65/0618—Linear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/769—Sanitary equipment
    • B29L2031/7694—Closets, toilets

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Toilet Supplies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

本発明は、底板と着座面板とを振動溶着法により溶着した便座に関する。   The present invention relates to a toilet seat in which a bottom plate and a seating surface plate are welded by a vibration welding method.

熱可塑性樹脂製品の部材どうしを接合する方法として、超音波や低周波を利用した振動溶着法が従来から広くから利用され、腰掛け式の便器に付帯する合成樹脂製の便座についてもこの振動溶着法が適用されている。便器用の便座としては、一枚の緩やかな円弧用の断面形状とした最も簡単なもののほか、たとえば暖房便座のようにヒータを内蔵するものや、局部洗浄機能を持つ温水洗浄便座のように人の着座を検知するためのセンサやその他の電気配線を収納するものでは内部を中空構造としたものがある。そして、後者のものでは便器本体側に臨む底板とこれに被さる着座面板の２つの部材を振動溶着法によって接合して製品化されている。振動溶着法では、溶着部に溶着ビート又は溶着ヒゲが発生することは避けられないことは従来から知られている。   A vibration welding method using ultrasonic waves and low frequencies has been widely used as a method for joining thermoplastic resin product members together. This vibration welding method is also used for toilet seats made of synthetic resin attached to a stool. Has been applied. Toilet seats for toilets are not only the simplest one with a gentle cross-sectional shape for a circular arc, but also a person with a built-in heater such as a heated toilet seat or a warm water flush toilet seat with a local cleaning function. Some of the sensors for detecting the seating and other electrical wiring are housed in a hollow structure. And in the latter thing, two members, the bottom plate which faces the toilet body side, and the seating surface plate which covers this are joined by the vibration welding method, and are commercialized. It has been conventionally known that in the vibration welding method, it is inevitable that welding beats or welding beards are generated in the welding portion.

この問題に対して従来技術として、底板及び着座面板をそれぞれの外周縁と間隔をおいた位置の溶着部を振動溶着法により接合する便座において、溶着部より外側に位置して便座の外郭を相互の重合によって形成する底板または着座面板のそれぞれの部位の少なくとも一方を、振動溶着時の加圧によって撓み変形可能な肉厚とし、底板溶着治具及び面板溶着治具の少なくとも一方は、撓み変形可能な肉厚とした部位を自由端とする形状のものがある（例えば、特許文献１参照。）。   To solve this problem, as a conventional technique, in a toilet seat in which the welded portion at a position spaced apart from the outer peripheral edge of the bottom plate and the seating surface plate are joined by the vibration welding method, the outer contour of the toilet seat is positioned outside the welded portion. At least one of each part of the bottom plate or the seating surface plate formed by the polymerization is made thick enough to be deformable by pressure during vibration welding, and at least one of the bottom plate welding jig and the face plate welding jig can be bent and deformed. There is a shape that has a portion with a large thickness as a free end (see, for example, Patent Document 1).

特開平１０−１６５３３１号公報Japanese Patent Laid-Open No. 10-165331

しかしながら従来技術では、底板または着座面板の少なくとも一方を振動溶着時の加圧によって撓み変形可能な肉厚とした部位を自由端とする形状にする必要があり、製品設計の自由度が制限され、また高度な加工精度が求められ、コスト高の要因になる。また、振動溶着時の加圧によって撓み変形可能な肉厚部に割れ等の不具合を生じる虞がある。また、底板及び着座面板の振動溶着の際に発生する溶着ビート又は溶着ヒゲが外周縁に噛み込んで、外周縁の外へ突出する虞がある。溶着ビート又は溶着ヒゲが外周縁に噛み込んで、外周縁の外へ突出すると外観不良となり、人の手で溶着ビード又は溶着ヒゲを取り除く作業が必要で生産性の低下、コストの増大につながる。   However, in the prior art, it is necessary to make at least one of the bottom plate or the seating surface plate a shape having a thickened portion that can be bent and deformed by pressurization during vibration welding, and the degree of freedom in product design is limited. In addition, a high degree of machining accuracy is required, resulting in high costs. Moreover, there is a possibility that a problem such as a crack may occur in the thick part that can be bent and deformed by pressurization during vibration welding. Further, there is a possibility that welding beats or welding whiskers generated during vibration welding of the bottom plate and the seating surface plate may bite into the outer peripheral edge and protrude out of the outer peripheral edge. If the welding beat or welding whisker bites into the outer peripheral edge and protrudes out of the outer peripheral edge, the appearance is poor, and it is necessary to remove the welding bead or welding whiskers by human hands, leading to a decrease in productivity and an increase in cost.

本発明は上記問題点に鑑みて成されたものであり、従来技術より底板及び着座面板の外周縁及び接着部の設計の自由度が高く、高い加工精度が不要で、振動溶着時の加圧による割れ等の不具合が生じず、溶着ビート又は溶着ヒゲが外周縁の外に突出することを防止する便座を提供することを目的とする。   The present invention has been made in view of the above-mentioned problems, and has a higher degree of freedom in designing the outer peripheral edge of the bottom plate and the seating surface plate and the bonding portion than in the prior art, does not require high processing accuracy, and pressurization during vibration welding It is an object of the present invention to provide a toilet seat that prevents a welding beat or a welding mustache from projecting out of the outer peripheral edge without causing problems such as cracks due to the above.

本発明の第１の課題解決手段は、底板と、前記底板に被せて振動溶着法により一体化する着座面板と、前記底板と前記着座面板で形成される外周縁と、前記外周縁と間隔をおいた位置で前記底板及び前記着座面板が溶着して接合する溶着部と、前記底板及び前記着座面板のいずれか一方で、前記外周縁と前記溶着部の間に形成される凹部と、を備える便座であって、前記底板及び前記着座面板のいずれか他方に、前記凹部に対向して配設され、前記凹部の空間に延在されて、前記底板及び前記着座面板の溶着の際に発生する溶着ビート又は溶着ヒゲが前記外周縁の外へ突出するのを防止する障害壁を設け、前記障害壁は前記凹部の底部に当接しない構成である。 A first problem-solving means of the present invention includes a bottom plate, a seating surface plate that is integrated on the bottom plate by a vibration welding method, an outer peripheral edge formed by the bottom plate and the seating surface plate , and an interval between the outer peripheral edge. A welded portion where the bottom plate and the seating surface plate are welded and joined at a position, and a recess formed between the outer peripheral edge and the welded portion on either the bottom plate or the seating surface plate. A toilet seat, which is disposed on one of the bottom plate and the seating surface plate so as to face the concave portion, extends into the space of the concave portion, and is generated when the bottom plate and the seating surface plate are welded. An obstacle wall that prevents the welding beat or welding beard from protruding out of the outer peripheral edge is provided , and the obstacle wall is configured not to contact the bottom of the recess .

また、第３の課題解決手段は、前記障害壁は、前記空間の前記溶着部と前記外周縁を結ぶ位置に設けられる構成である。 The third problem-solving means is configured such that the obstacle wall is provided at a position connecting the welded portion of the space and the outer peripheral edge.

また、第４の課題解決手段は、前記障害壁は、前記底板の平面に突起した形状で設けられる構成である。 Further, a fourth problem solving means is a configuration in which the obstacle wall is provided in a shape protruding on a plane of the bottom plate.

本発明では、底板及び着座面板の少なくともいずれか一方で、外周縁と溶着部の間の空間に位置する障害壁を備えるため、振動溶着の際に発生した溶着ビート又は溶着ヒゲが空間を通って外周縁の合わせ隙間から突出することを防止できる。従来技術のような底板または着座面板の少なくとも一方を振動溶着時の加圧によって撓み変形可能な肉厚とした部位を自由端とする形状が不要で、外周縁及び接着部の設計の自由度が高く、高い加工精度が不要で、振動溶着時の加圧によって割れ等の不具合が生じる虞がない。   In the present invention, since at least one of the bottom plate and the seating surface plate is provided with the obstacle wall located in the space between the outer peripheral edge and the welding portion, the welding beat or welding whisker generated during vibration welding passes through the space. It can prevent protruding from the alignment gap of the outer periphery. There is no need for a shape in which at least one of the bottom plate or the seating surface plate is thick enough to bend and deform by pressurization during vibration welding as in the prior art, and the degree of freedom in designing the outer peripheral edge and the adhesive portion is not required. High and high machining accuracy is not required, and there is no risk of problems such as cracking due to pressurization during vibration welding.

また、障害壁は空間内で溶着部と外周縁を結ぶ線上の位置に設けられるため、溶着の際の溶着ビート又は溶着ヒゲが延びて外周縁の合わせ隙間から突出することを防止できる。   Further, since the obstacle wall is provided at a position on the line connecting the welded portion and the outer peripheral edge in the space, it is possible to prevent the welding beat or welding whisker from extending and protruding from the gap between the outer peripheral edges.

また、障害壁は、底板の平面に突起した形状で設けられるシンプルな構成のため、従来技術と比べて設計の自由度が高く、また高い加工精度が不要なため、低コスト化が可能である。   In addition, the obstacle wall has a simple configuration with a shape that protrudes from the plane of the bottom plate, so the degree of freedom in design is higher than in the prior art, and high processing accuracy is not required, so the cost can be reduced. .

本発明の便座の裏面図である。It is a reverse view of the toilet seat of this invention. 本発明の便座のＡ−Ａ断面図である。It is AA sectional drawing of the toilet seat of this invention. 本発明の便座のＢ部拡大図である。It is the B section enlarged view of the toilet seat of this invention.

以下に本発明の実施の形態について詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail.

図１は、本発明の温水洗浄装置の便座１の裏面図である。便座１は、熱可塑性樹脂から成る底板２と、底板２に被せて振動溶着法により一体化される熱可塑性樹脂から成る着座面板３と、から構成される。   FIG. 1 is a back view of the toilet seat 1 of the hot water cleaning apparatus of the present invention. The toilet seat 1 includes a bottom plate 2 made of a thermoplastic resin, and a seating face plate 3 made of a thermoplastic resin that covers the bottom plate 2 and is integrated by a vibration welding method.

図２は、図１のＡ−Ａ断面図である。底板２と着座面板３が合わさるＢ部は、外周縁４と、外周縁４と間隔をおいた位置で底板２及び着座面板３が溶着して接合する溶着部５と、外周縁４と溶着部５の間に形成される空間６と、を備える。底板２はほぼ一様な肉厚の平面で、外周縁４、溶着部５は便座１の全周に渡って形成される。   FIG. 2 is a cross-sectional view taken along the line AA of FIG. The B part where the bottom plate 2 and the seating surface plate 3 are combined includes the outer peripheral edge 4, the welded part 5 where the bottom plate 2 and the seating surface plate 3 are welded and joined at a position spaced from the outer peripheral edge 4, and the outer peripheral edge 4 and the welded part. And a space 6 formed between the two. The bottom plate 2 is a plane having a substantially uniform thickness, and the outer peripheral edge 4 and the welded portion 5 are formed over the entire circumference of the toilet seat 1.

図３は、図２のＢ部拡大図である。空間６には底板２に形成された障害壁７が設けられる。障害壁７は、空間６の溶着部５と外周縁４を結ぶ線上に位置し、底板２の平面から突起した形状である。   FIG. 3 is an enlarged view of a portion B in FIG. In the space 6, an obstacle wall 7 formed on the bottom plate 2 is provided. The obstacle wall 7 is located on a line connecting the welded portion 5 and the outer peripheral edge 4 of the space 6 and has a shape protruding from the plane of the bottom plate 2.

本発明の便座１の溶着の際の障害壁７の機能について説明する。底板２と着座面板３は、図示しない溶着治具によって加圧と振動が加えられる。溶着部５は摩擦熱で溶融し、底板２と着座面板３は溶着部で溶着される。このとき、溶着部には摩擦熱で溶融した熱可塑性樹脂が溶着ビート等９（溶着ビート又は溶着ヒゲ）として発生する。障害壁７は空間６内で溶着部５と外周縁４を結ぶ線上の位置に設けられるため、溶着ビート等９が外周縁４の合わせ隙間８から外に突出するのを防止する。   The function of the obstacle wall 7 when the toilet seat 1 of the present invention is welded will be described. The bottom plate 2 and the seating surface plate 3 are pressurized and vibrated by a welding jig (not shown). The welded portion 5 is melted by frictional heat, and the bottom plate 2 and the seating face plate 3 are welded at the welded portion. At this time, a thermoplastic resin melted by frictional heat is generated at the welded portion as welding beats 9 (welding beats or welding whiskers). Since the obstacle wall 7 is provided at a position on the line connecting the welded portion 5 and the outer peripheral edge 4 in the space 6, the welding beat 9 or the like 9 is prevented from protruding outside from the alignment gap 8 of the outer peripheral edge 4.

本発明では、底板２に外周縁４と溶着部５の間の空間に位置する障害壁７を備えるため、振動溶着の際に発生した溶着ビート等９が空間６を通って外周縁４の合わせ隙間８から外に突出することを防止できる。底板または着座面板の少なくとも一方を振動溶着時の加圧によって撓み変形可能な肉厚とした部位を自由端とする形状が不要で、外周縁４及び接着部５の設計の自由度が高く、高い加工精度が不要で、振動溶着時の加圧によって割れ等の不具合を生じない。   In the present invention, since the bottom plate 2 is provided with the obstacle wall 7 located in the space between the outer peripheral edge 4 and the welded portion 5, welding beats 9 generated during vibration welding pass through the space 6 and align the outer peripheral edge 4. Protruding outside from the gap 8 can be prevented. There is no need for a shape in which at least one of the bottom plate or the seating face plate is a free end that can be bent and deformed by pressurization during vibration welding, and the design of the outer peripheral edge 4 and the bonding portion 5 is highly flexible and high. Machining accuracy is not required, and cracks and other problems do not occur due to the pressure applied during vibration welding.

また、障害壁７は空間６内で溶着部５と外周縁４を結ぶ線上の位置に設けられるため、溶着の際の溶着ビート等９が延びて外周縁４の合わせ隙間８から突出することを防止できる。   Further, since the obstacle wall 7 is provided at a position on the line connecting the welded portion 5 and the outer peripheral edge 4 in the space 6, a welding beat 9 at the time of welding extends and protrudes from the alignment gap 8 of the outer peripheral edge 4. Can be prevented.

また、障害壁７は、底板２の平面に突起したシンプルな形状であるため、従来技術と比べて設計の自由度が高く、また高い加工精度が不要なため、低コスト化が可能である。   Further, since the obstacle wall 7 has a simple shape protruding on the plane of the bottom plate 2, the degree of freedom of design is higher than that of the prior art, and high processing accuracy is not required, so that the cost can be reduced.

１ 便座
２ 底板
３ 着座面板
４ 外周縁
５ 溶着部
６ 空間
７ 障害壁
９ 溶着ビート等（溶着ビート又は溶着ヒゲ） DESCRIPTION OF SYMBOLS 1 Toilet seat 2 Bottom plate 3 Seating face plate 4 Outer periphery 5 Welding part 6 Space 7 Obstacle wall 9 Welding beat, etc. (welding beat or welding mustache)

Claims (4)

底板と、
前記底板に被せて振動溶着法により一体化する着座面板と、
前記底板と前記着座面板で形成される外周縁と、
前記外周縁と間隔をおいた位置で前記底板及び前記着座面板が溶着して接合する溶着部と、
前記底板及び前記着座面板のいずれか一方で、前記外周縁と前記溶着部の間に形成される凹部と、を備える便座であって、
前記底板及び前記着座面板のいずれか他方に、前記凹部に対向して配設され、前記凹部の空間に延在されて、前記底板及び前記着座面板の溶着の際に発生する溶着ビート又は溶着ヒゲが前記外周縁の外へ突出するのを防止する障害壁を設け、
前記障害壁は前記凹部の底部に当接しない
ことを特徴とする便座。 The bottom plate,
A seating face plate that covers the bottom plate and is integrated by a vibration welding method;
An outer periphery formed by the bottom plate and the seating surface plate;
A welded portion where the bottom plate and the seating face plate are welded and joined at a position spaced from the outer peripheral edge; and
A toilet seat comprising either one of the bottom plate and the seating face plate, and a recess formed between the outer peripheral edge and the welded portion,
One of the bottom plate and the seating surface plate is disposed so as to face the concave portion, and extends into the space of the concave portion, and generates a welding beat or welding whisker generated when the bottom plate and the seating surface plate are welded. Is provided with a barrier wall that prevents the outer peripheral edge from protruding outside ,
The toilet seat is characterized in that the obstacle wall does not contact the bottom of the recess . 底板と、The bottom plate,
前記底板に被せて振動溶着法により一体化する着座面板と、A seating face plate that covers the bottom plate and is integrated by a vibration welding method;
前記底板と前記着座面板で形成される外周縁と、An outer periphery formed by the bottom plate and the seating surface plate;
前記外周縁と間隔をおいた位置で前記底板及び前記着座面板が溶着して接合する溶着部と、A welded portion where the bottom plate and the seating face plate are welded and joined at a position spaced from the outer peripheral edge; and
前記底板及び前記着座面板のいずれか一方で、前記外周縁と前記溶着部の間に形成される凹部と、を備える便座であって、A toilet seat comprising either one of the bottom plate and the seating face plate, and a recess formed between the outer peripheral edge and the welded portion,
前記底板及び前記着座面板のいずれか他方の前記凹部に対向する部分に配設され、前記凹部の空間に延在されて前記底板及び前記着座面板の溶着の際に発生する溶着ビート又は溶着ヒゲが前記外周縁の外へ突出するのを防止する障害壁を設け、There is a welding beat or a welding beard that is disposed in a portion of the bottom plate and the seating surface plate facing the concave portion and extends to the space of the concave portion and is generated when the bottom plate and the seating surface plate are welded. An obstacle wall is provided to prevent the outer peripheral edge from protruding outside,
前記障害壁は、前記凹部の底面に当接せず、The obstacle wall does not contact the bottom surface of the recess,
前記凹部に対向する部分で前記障害壁と前記溶着部との間の部分は、前記凹部とは反対側に凹んでいないThe portion between the obstacle wall and the welded portion at the portion facing the recess is not recessed on the opposite side of the recess.
ことを特徴とする便座。A toilet seat characterized by that. 前記障害壁は、前記空間の前記溶着部と前記外周縁を結ぶ線上の位置に設けられることを特徴とする請求項１又は請求項２に記載の便座。 The toilet seat according to claim 1 or 2 , wherein the obstacle wall is provided at a position on a line connecting the welded portion and the outer peripheral edge of the space. 前記障害壁は、前記底板の平面に突起した形状で設けられることを特徴とする請求項１から３のいずれか一に記載の便座。 The toilet seat according to any one of claims 1 to 3, wherein the obstacle wall is provided in a shape protruding on a plane of the bottom plate.
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