JP2018104968A - Cleaning port covering packing - Google Patents
Cleaning port covering packing Download PDFInfo
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- JP2018104968A JP2018104968A JP2016251544A JP2016251544A JP2018104968A JP 2018104968 A JP2018104968 A JP 2018104968A JP 2016251544 A JP2016251544 A JP 2016251544A JP 2016251544 A JP2016251544 A JP 2016251544A JP 2018104968 A JP2018104968 A JP 2018104968A
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- cleaning port
- cover
- packing
- drain trap
- cleaning
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- 238000004140 cleaning Methods 0.000 title claims abstract description 94
- 238000012856 packing Methods 0.000 title claims abstract description 63
- 239000000428 dust Substances 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract 2
- 230000001174 ascending effect Effects 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Sink And Installation For Waste Water (AREA)
Abstract
Description
本発明は、清掃口カバー用パッキンに関する。 The present invention relates to a packing for a cleaning port cover.
排水トラップにおいて、配管内に詰まりが生じた際の清掃を可能とするために、下り部と上り部を繋ぐ屈曲部に清掃口を設けた構造が開示されている（特許文献１参照）。 In the drain trap, in order to enable cleaning when clogging occurs in the pipe, a structure is disclosed in which a cleaning port is provided in a bent portion connecting the descending portion and the ascending portion (see Patent Document 1).
上記した従来例の清掃口は、屈曲部の下端から下方に突出した筒状とされている。清掃口には、着脱可能なカバーが取り付けられる。 The above-described conventional cleaning port has a cylindrical shape protruding downward from the lower end of the bent portion. A removable cover is attached to the cleaning port.
しかしながら、この構成では、排水が排水トラップを通過する際に清掃口の内側の空間に入り込むため、乱流が発生し易い。繊維質の多い生ごみをディスポーザにて粉砕して流した場合には、乱流により繊維質の固まりが発生し、詰まりが発生し易くなる。 However, in this configuration, since the wastewater enters the space inside the cleaning port when passing through the drain trap, turbulent flow is likely to occur. When garbage with a large amount of fiber is pulverized with a disposer and flowed, the turbulent flow causes a lump of fibers to be generated, and clogging is likely to occur.
本発明は、排水トラップの清掃口におけるごみの詰まりを抑制することを目的とする。 An object of the present invention is to suppress clogging of dust at a cleaning port of a drain trap.
請求項１に係る清掃口カバー用パッキンは、排水トラップの流路に設けられた筒状の清掃口と前記清掃口を塞ぐカバーとの間に挟まれる環状のパッキン本体と、前記パッキン本体に一体的に構成され、前記カバーを前記清掃口に取り付けた状態において前記清掃口の内側の空間を埋める柱状部と、を有する。 A packing for a cleaning port cover according to claim 1 is formed integrally with an annular packing body sandwiched between a cylindrical cleaning port provided in a flow path of a drain trap and a cover for closing the cleaning port, and the packing body. And a columnar portion that fills the space inside the cleaning port when the cover is attached to the cleaning port.
この清掃口カバー用パッキンでは、排水トラップの清掃口とカバーとの間にパッキン本体が挟まれることで、清掃口からの水漏れを抑制できる。また、カバーを清掃口に取り付けた状態において、柱状部により清掃口の内側の空間が埋められるので、排水トラップに排水を流したときに、清掃口の部分での乱流の発生が抑制される。したがって、繊維質のごみが含まれた排水であっても、排水トラップを円滑に通過させることができる。パッキン本体と柱状部が一体なので部品が大きくなり、紛失しにくく、狭い場所の取付け、取外しも容易となる。更に、清掃口カバー用パッキンがカバーの上に乗るので、取付け、取外し時に脱落しにくい。 In the cleaning port cover packing, water leakage from the cleaning port can be suppressed by sandwiching the packing body between the cleaning port of the drain trap and the cover. In addition, when the cover is attached to the cleaning port, the space inside the cleaning port is filled with the columnar portion, so that when the drainage is passed through the drain trap, the occurrence of turbulent flow at the cleaning port is suppressed. . Therefore, even waste water containing fibrous waste can be smoothly passed through the drain trap. Since the packing body and the columnar part are integrated, the parts become large and are not easily lost, making it easy to install and remove in narrow spaces. Furthermore, since the cleaning port cover packing is placed on the cover, it is difficult to fall off during installation and removal.
請求項２の発明は、請求項１に記載の清掃口カバー用パッキンにおいて、前記柱状部が、前記カバーを前記清掃口に取り付けた状態において、先端が前記流路に面する高さを有している。 According to a second aspect of the present invention, in the cleaning port cover packing according to the first aspect, the columnar portion has a height at which a tip faces the flow path when the cover is attached to the cleaning port. ing.
この清掃口カバー用パッキンでは、カバーを清掃口に取り付けた状態において、柱状部の先端が排水トラップの流路に面するので、清掃口の部分での乱流の発生が更に抑制される。 In this cleaning port cover packing, in the state where the cover is attached to the cleaning port, the tip of the columnar portion faces the flow path of the drain trap, so that the generation of turbulent flow at the cleaning port portion is further suppressed.
請求項３の発明は、請求項１又は請求項２に記載の清掃口カバー用パッキンにおいて、前記パッキン本体が、前記カバーに嵌込み可能である。 According to a third aspect of the present invention, in the packing for a cleaning port cover according to the first or second aspect, the packing main body can be fitted into the cover.
この清掃口カバー用パッキンでは、パッキン本体をカバーに嵌込むことができるので、カバーを清掃口から取り外した状態において、脱落することがない。このため、カバーの着脱の作業性を高めることができる。 In this cleaning port cover packing, since the packing body can be fitted into the cover, it does not fall off when the cover is removed from the cleaning port. For this reason, the workability of attaching and detaching the cover can be improved.
本発明に係る清掃口カバー用パッキンによれば、排水トラップの清掃口におけるごみの詰まりを抑制することができる。 According to the packing for a cleaning port cover according to the present invention, clogging of dust at the cleaning port of the drain trap can be suppressed.
以下、本発明を実施するための形態を図面に基づき説明する。図１、図２において、本実施形態に係る清掃口カバー用パッキン１０は、例えばサイホン排水システム用の排水トラップ１２の清掃口１４に取り付けられる止水部材である。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 and 2, a cleaning port cover packing 10 according to the present embodiment is a water stop member attached to a cleaning port 14 of a drain trap 12 for a siphon drainage system, for example.
まず、排水トラップ１２の一例について簡単に説明する。排水トラップ１２は、例えばＳ型の排水トラップであり、樹脂成形品である。この排水トラップ１２には、上流側から下流側に向かって、第１下り部２１、第１屈曲部３１、上り部１６、第２屈曲部３２及び第２下り部２２が順に設けられている。 First, an example of the drain trap 12 will be briefly described. The drain trap 12 is, for example, an S-shaped drain trap and is a resin molded product. The drain trap 12 is provided with a first descending portion 21, a first bent portion 31, an ascending portion 16, a second bent portion 32, and a second descending portion 22 in this order from the upstream side to the downstream side.
第１下り部２１は、水廻り器具からの排水管（図示せず）が接続される部位である。第１屈曲部３１は、第１下り部２１の下端と上り部１６の下端とを繋ぐ略Ｕ字状の部分である。第２屈曲部３２は、上り部１６の上端と第２下り部２２の上端とを繋ぐ略逆Ｕ字状の部分である。第２下り部２２は、更に下流側の排水管が接続される部位である。上り部１６は、第１下り部２１よりも小径に構成されている。 The first descending portion 21 is a portion to which a drain pipe (not shown) from a watering device is connected. The first bent portion 31 is a substantially U-shaped portion that connects the lower end of the first descending portion 21 and the lower end of the ascending portion 16. The second bent portion 32 is a substantially inverted U-shaped portion that connects the upper end of the ascending portion 16 and the upper end of the second descending portion 22. The 2nd descent | fall part 22 is a site | part to which the downstream drainage pipe is connected further. The ascending portion 16 is configured to have a smaller diameter than the first descending portion 21.
第１屈曲部３１の底部には、筒状の清掃口１４が設けられている。清掃口１４の外周には、雄ねじ部１４Ａが形成されている。この雄ねじ部１４Ａには、カバー２０の雌ねじ部２０Ａが螺合することで、カバー２０が清掃口１４に取り付けられるようになっている。また、第２屈曲部３２には、上方に開口した通気弁取付け部１８が設けられている。通気弁（図示せず）は、外部からの空気を排水トラップ１２へ通過させると共に排水トラップ１２から外部へ排水及び空気を通過させないための部品である。なお、清掃口１４の位置は、第１屈曲部３１の底部に限られない。清掃口１４が排水トラップ１２の他の部位に設けられていてもよい。 A cylindrical cleaning port 14 is provided at the bottom of the first bent portion 31. A male screw portion 14 </ b> A is formed on the outer periphery of the cleaning port 14. The cover 20 is attached to the cleaning port 14 by screwing the female screw portion 20A of the cover 20 into the male screw portion 14A. Further, the second bent portion 32 is provided with a vent valve mounting portion 18 opened upward. The vent valve (not shown) is a part for allowing air from outside to pass through the drain trap 12 and preventing the drain and air from passing through the drain trap 12 to the outside. The position of the cleaning port 14 is not limited to the bottom of the first bent portion 31. The cleaning port 14 may be provided in another part of the drain trap 12.
上り部１６の中心軸Ｓ３と清掃口４の中心軸Ｓ２との距離ｄ２は、第１下り部２１の中心軸Ｓ１と清掃口４の中心軸Ｓ２との距離ｄ１よりも小さく形成されている。したがって、上り部１６は、第１下り部２１に比べて清掃口１４の近くに配置されている。換言すれば、清掃口１４は、第１下り部２１より上り部１６寄りに配置されている。上り部１６の流路の半分程度は、清掃口１４の直上に配置されている。これにより、汚れの影響が大きい細い配管（上り部１６の流路）の清掃が容易となっている。 The distance d2 between the central axis S3 of the ascending portion 16 and the central axis S2 of the cleaning port 4 is formed to be smaller than the distance d1 between the central axis S1 of the first descending portion 21 and the central axis S2 of the cleaning port 4. Therefore, the ascending portion 16 is disposed closer to the cleaning port 14 than the first descending portion 21. In other words, the cleaning port 14 is disposed closer to the ascending portion 16 than the first descending portion 21. About half of the flow path of the ascending portion 16 is disposed immediately above the cleaning port 14. This facilitates cleaning of a thin pipe (flow path of the upward portion 16) that is greatly affected by dirt.
次に、図１から図３において、清掃口カバー用パッキン１０は、パッキン本体２４と、柱状部２６とを有している。清掃口カバー用パッキン１０は、ゴム等が望ましく、その他樹脂、エラストマー等の弾性部材であってもよい。 Next, in FIGS. 1 to 3, the cleaning port cover packing 10 includes a packing body 24 and a columnar portion 26. The cleaning port cover packing 10 is desirably rubber or the like, and may be an elastic member such as resin or elastomer.
図１、図２に示されるように、パッキン本体２４は、排水トラップ１２の流路に設けられた筒状の清掃口１４と該清掃口１４を塞ぐカバー２０との間に挟まれる環状の部位である。このパッキン本体２４は、清掃口１４の端面１４Ｂと、カバー２０の底部２０Ｂとに挟まれる部位である。清掃口１４の端面が円環状に形成されているので、パッキン本体２４も円環状に形成されている。柱状部２６の下端から径方向外側に張り出して形成されている。よって、パッキン本体２４を、清掃口カバー用パッキン１０のフランジ部と言い換えることもできる。 As shown in FIGS. 1 and 2, the packing body 24 has an annular portion sandwiched between a cylindrical cleaning port 14 provided in the flow path of the drain trap 12 and a cover 20 that closes the cleaning port 14. It is. The packing body 24 is a part sandwiched between the end surface 14B of the cleaning port 14 and the bottom 20B of the cover 20. Since the end face of the cleaning port 14 is formed in an annular shape, the packing body 24 is also formed in an annular shape. The columnar portion 26 is formed so as to protrude radially outward from the lower end. Therefore, the packing body 24 can be rephrased as the flange portion of the cleaning port cover packing 10.
柱状部２６は、パッキン本体２４に一体的に構成され、カバー２０を清掃口１４に取り付けた状態において清掃口１４の内側の空間３０を埋める部位である。清掃口カバー用パッキン１０は、全体として段付きの円柱状に形成されており、柱状部２６とパッキン本体２４とは、互いに同軸上に形成されている。パッキン本体２４をフランジ部ではなく円板部と考えると、柱状部２６は該円板部からの上方突出部となる。 The columnar part 26 is a part that is integrally formed with the packing body 24 and fills the space 30 inside the cleaning port 14 in a state where the cover 20 is attached to the cleaning port 14. The cleaning port cover packing 10 is formed in a stepped columnar shape as a whole, and the columnar portion 26 and the packing body 24 are formed coaxially with each other. When the packing main body 24 is considered as a disk part instead of a flange part, the columnar part 26 becomes an upward projecting part from the disk part.
柱状部２６は、カバー２０を清掃口１４に取り付けた状態において、先端２６Ａが流路に面する高さを有している。柱状部２６は、清掃口１４の形状に合わせて円柱状に形成されている。柱状部２６の外径は、清掃口１４の内径と同等である。 The columnar portion 26 has a height at which the tip 26 </ b> A faces the flow path when the cover 20 is attached to the cleaning port 14. The columnar portion 26 is formed in a columnar shape in accordance with the shape of the cleaning port 14. The outer diameter of the columnar portion 26 is equal to the inner diameter of the cleaning port 14.
本実施形態では、清掃口１４が排水トラップ１２の第１屈曲部３１の底部に設けられていることから、先端２６Ａは、第１屈曲部３１の内面の輪郭の底部に位置するようになっている。 In this embodiment, since the cleaning port 14 is provided at the bottom of the first bent portion 31 of the drain trap 12, the tip 26A is positioned at the bottom of the contour of the inner surface of the first bent portion 31. Yes.
なお、排水を妨げないために、柱状部２６の先端２６Ａは流路内に突出しないことが望ましい。また、乱流が生じなければ、柱状部２６の先端２６Ａが流路に面していなくてもよい。柱状部２６の先端２６Ａは、清掃口１４への取付け向き（軸方向回りの角度位置）に関して方向性を有しない平面であるが、同様に方向性を有しない凹面であってもよい。 In order not to prevent drainage, it is desirable that the tip 26A of the columnar portion 26 does not protrude into the flow path. If no turbulent flow occurs, the tip 26A of the columnar portion 26 may not face the flow path. The front end 26A of the columnar portion 26 is a flat surface having no direction with respect to the mounting direction (the angular position about the axial direction) to the cleaning port 14, but may be a concave surface having no directivity.
パッキン本体２４は、カバー２０に嵌込み可能である。具体的には、カバー２０の雌ねじ部２０Ａよりも底部２０Ｂ側には、円筒部２０Ｃが設けられており、パッキン本体２４の外周が該円筒部２０Ｃに嵌込み可能となっている。例えば、パッキン本体２４の外径がカバー２０における円筒部２０Ｃの内径より少し大きくなっていることで、パッキン本体２４をカバー２０に嵌込み可能となっている。パッキン本体２４と雌ねじ部２０Ａとの干渉を抑制するため、パッキン本体２４の厚さは円筒部２０Ｃの長さと同等以下に設定されている。パッキン本体２４をカバー２０に嵌め込むことで、カバー２０と清掃口カバー用パッキン１０とが組み合わされる。 The packing body 24 can be fitted into the cover 20. Specifically, a cylindrical portion 20C is provided on the bottom 20B side of the female screw portion 20A of the cover 20, and the outer periphery of the packing body 24 can be fitted into the cylindrical portion 20C. For example, since the outer diameter of the packing body 24 is slightly larger than the inner diameter of the cylindrical portion 20 </ b> C in the cover 20, the packing body 24 can be fitted into the cover 20. In order to suppress interference between the packing body 24 and the female screw portion 20A, the thickness of the packing body 24 is set to be equal to or less than the length of the cylindrical portion 20C. By fitting the packing body 24 into the cover 20, the cover 20 and the cleaning port cover packing 10 are combined.
図２のように、雌ねじ部２０Ａの底部２０Ｂ側の端部の位置を清掃口カバー用パッキン１０のパッキン本体２４Ａよりも上方にすれば、カバー２０を締め付けすぎることなく、清掃口１４に取付け可能となる。また、雌ねじ部２０Ａの底部２０Ｂ側の端部の位置をパッキン本体２４Ａの径方向に重なる位置にすれば、カバー２０を取り付けた際、清掃口１４が確実にシールされることになる。この様に、雌ねじ部２０Ａとパッキン本体２４Ａの位置関係は適宜調整することが可能である。 As shown in FIG. 2, if the position of the end portion on the bottom 20B side of the female screw portion 20A is set higher than the packing body 24A of the cleaning port cover packing 10, the cover 20 can be attached to the cleaning port 14 without being overtightened. It becomes. Further, if the position of the end portion on the bottom 20B side of the female screw portion 20A is set to a position overlapping in the radial direction of the packing body 24A, the cleaning port 14 is reliably sealed when the cover 20 is attached. In this way, the positional relationship between the female thread portion 20A and the packing body 24A can be adjusted as appropriate.
（作用）
本実施形態は、上記のように構成されており、以下その作用について説明する。図１において、本実施形態に係る清掃口カバー用パッキン１０では、排水トラップ１２の清掃口１４とカバー２０との間にパッキン本体２４が挟まれることで、清掃口１４からの水漏れを抑制できる。また、カバー２０を清掃口１４に取り付けた状態においては、柱状部２６により清掃口１４の内側の空間３０が埋められる。
(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 1, in the cleaning port cover packing 10 according to the present embodiment, the packing body 24 is sandwiched between the cleaning port 14 of the drain trap 12 and the cover 20, so that water leakage from the cleaning port 14 can be suppressed. . In the state where the cover 20 is attached to the cleaning port 14, the space 30 inside the cleaning port 14 is filled with the columnar portion 26.
特に、本実施形態では、この清掃口カバー用パッキン１０では、カバー２０を清掃口１４に取り付けた状態において、柱状部２６の先端２６Ａが排水トラップ１２の流路に面する。したがって、排水トラップ１２に排水を流したときに、清掃口１４の部分での乱流の発生が抑制される。したがって、繊維質のごみが含まれた排水であっても、排水トラップ１２を円滑に通過させることができる。このため、排水トラップ１２の清掃口１４におけるごみの詰まりを抑制することができる。 In particular, in this embodiment, in the cleaning port cover packing 10, the tip 26 </ b> A of the columnar portion 26 faces the flow path of the drain trap 12 in a state where the cover 20 is attached to the cleaning port 14. Therefore, when drainage is passed through the drain trap 12, the occurrence of turbulent flow at the cleaning port 14 is suppressed. Therefore, even if it is the waste_water | drain containing fibrous waste, the waste_water | drain trap 12 can be passed smoothly. For this reason, the clogging of the dust in the cleaning port 14 of the drain trap 12 can be suppressed.
また、清掃口カバー用パッキン１０を、パッキン本体２４の部分でカバー２０に嵌込むことができるので、カバー２０を清掃口１４から取り外したときに、清掃口カバー用パッキン１０が脱落することがない。パッキン本体２４と柱状部２６が一体なので、部品が大きくなり、紛失しにくく、狭い場所の取付け、取外しも容易となる。このため、カバー２０の着脱の作業性、更には排水管の清掃性を高めることができる。 Further, since the cleaning port cover packing 10 can be fitted into the cover 20 at the portion of the packing body 24, the cleaning port cover packing 10 does not fall off when the cover 20 is removed from the cleaning port 14. . Since the packing main body 24 and the columnar part 26 are integrated, the parts are large, are not easily lost, and are easily attached and removed in a narrow place. For this reason, the workability of attaching / detaching the cover 20 and the cleaning property of the drain pipe can be improved.
［他の実施形態］
以上、本発明の実施形態の一例について説明したが、本発明の実施形態は、上記に限定されるものでなく、上記以外にも、その主旨を逸脱しない範囲内において種々変形して実施可能であることは勿論である。
[Other Embodiments]
As mentioned above, although an example of embodiment of this invention was demonstrated, embodiment of this invention is not limited above, In addition to the above, in a range which does not deviate from the main point, it can implement variously. Of course there is.
例えば、本実施形態における排水トラップ１２が、サイホン排水システムに適用されるものとしたが、勾配配管を有する従来の排水システムにも適用可能である。 For example, although the drain trap 12 in the present embodiment is applied to a siphon drain system, it can also be applied to a conventional drain system having a gradient pipe.
パッキン本体２４がカバー２０に嵌込み可能であるものとしたが、パッキン本体２４の外径がカバー２０の円筒部２０Ｃの内径よりも小さく、カバー２０に嵌め込むことができない構成であってもよい。この場合でも、清掃口カバー用パッキン１０がカバー２０の上に乗るので、取付け、取外し時に脱落しにくい。 Although the packing main body 24 can be fitted into the cover 20, the outer diameter of the packing main body 24 may be smaller than the inner diameter of the cylindrical portion 20 </ b> C of the cover 20 and cannot be fitted into the cover 20. . Even in this case, since the cleaning port cover packing 10 is placed on the cover 20, it is difficult to drop off during mounting and removal.
１０…清掃口カバー用パッキン、１２…排水トラップ、１４…清掃口、２０…カバー、２４…パッキン本体、２６…柱状部、３０…空間 DESCRIPTION OF SYMBOLS 10 ... Cleaning port cover packing, 12 ... Drain trap, 14 ... Cleaning port, 20 ... Cover, 24 ... Packing main body, 26 ... Columnar part, 30 ... Space
Claims (3)
前記パッキン本体に一体的に構成され、前記カバーを前記清掃口に取り付けた状態において前記清掃口の内側の空間を埋める柱状部と、
を有する清掃口カバー用パッキン。 An annular packing body sandwiched between a cylindrical cleaning port provided in the flow path of the drain trap and a cover for closing the cleaning port;
A columnar portion that is configured integrally with the packing body and fills the space inside the cleaning port in a state where the cover is attached to the cleaning port;
Packing for cleaning port cover.
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| JP2016251544A JP6837827B2 (en) | 2016-12-26 | 2016-12-26 | Drain trap |
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| JP2016251544A JP6837827B2 (en) | 2016-12-26 | 2016-12-26 | Drain trap |
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| JP2018104968A true JP2018104968A (en) | 2018-07-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2021095673A (en) * | 2019-12-13 | 2021-06-24 | 株式会社ブリヂストン | Pipe trap, and waste water pipe structure |
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| JP6103350B2 (en) * | 2012-12-18 | 2017-03-29 | カシオ計算機株式会社 | Exercise support device, exercise support method, and exercise support program |
| KR102502347B1 (en) * | 2021-07-07 | 2023-02-21 | 이춘식 | Connecting socket for drain |
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| JPH0533375A (en) * | 1991-07-29 | 1993-02-09 | Maezawa Kasei Kogyo Kk | Trap pipe with cleaning hole |
| US20030163869A1 (en) * | 2002-03-04 | 2003-09-04 | Louis Bosch | Clear view drain |
| JP2014234591A (en) * | 2013-05-31 | 2014-12-15 | 丸一株式会社 | Connection structure of piping member |
| JP2015098702A (en) * | 2013-11-19 | 2015-05-28 | 丸一株式会社 | Drainage trap |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0533375A (en) * | 1991-07-29 | 1993-02-09 | Maezawa Kasei Kogyo Kk | Trap pipe with cleaning hole |
| US20030163869A1 (en) * | 2002-03-04 | 2003-09-04 | Louis Bosch | Clear view drain |
| JP2014234591A (en) * | 2013-05-31 | 2014-12-15 | 丸一株式会社 | Connection structure of piping member |
| JP2015098702A (en) * | 2013-11-19 | 2015-05-28 | 丸一株式会社 | Drainage trap |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2021095673A (en) * | 2019-12-13 | 2021-06-24 | 株式会社ブリヂストン | Pipe trap, and waste water pipe structure |
| JP7458178B2 (en) | 2019-12-13 | 2024-03-29 | 株式会社ブリヂストン | drain pipe structure |
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