JP2725126B2 - Vacuum breaker - Google Patents
Vacuum breakerInfo
- Publication number
- JP2725126B2 JP2725126B2 JP33518492A JP33518492A JP2725126B2 JP 2725126 B2 JP2725126 B2 JP 2725126B2 JP 33518492 A JP33518492 A JP 33518492A JP 33518492 A JP33518492 A JP 33518492A JP 2725126 B2 JP2725126 B2 JP 2725126B2
- Authority
- JP
- Japan
- Prior art keywords
- valve member
- flexible valve
- casing
- vacuum breaker
- guide wall
- 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.)
- Expired - Lifetime
Links
Landscapes
- Sanitary Device For Flush Toilet (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、水路系内の逆流を防
止するバキュームブレーカに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum breaker for preventing backflow in a waterway system.
【０００２】[0002]
【従来の技術】従来、水路系、例えば水洗大便器と、こ
の水洗大便器へ洗浄水を噴出させるフラッシュ弁との間
にはバキュームブレーカが介在されており、このバキュ
ームブレーカは、例えば水洗大便器内での水の抜き取り
等に起因して水供給水路内に真空状態が生じた時等に、
フラッシュ弁が作動されると、詰まった水洗大便器の汚
水が飲料水供給水路内に逆流することを有効に防止する
ために設置されるものであって、従来のバキュームブレ
ーカとして、例えば図３に示すような構造のものがあ
る。2. Description of the Related Art Conventionally, a vacuum breaker is interposed between a waterway system, for example, a flush toilet and a flush valve for ejecting flush water to the flush toilet, and the vacuum breaker is, for example, a flush toilet. When a vacuum condition occurs in the water supply channel due to the extraction of water inside, etc.,
When the flush valve is actuated, it is installed to effectively prevent contaminated sewage from the flush toilet from flowing back into the drinking water supply channel, and as a conventional vacuum breaker, for example, as shown in FIG. Some have the structure shown.
【０００３】即ち、バキュームブレーカ５１は、円管状
に形成されたケーシング５２を有し、このケーシング５
２の上端部には外方に突出状にフランジ部５３が形成さ
れており、このフランジ部５３の下方の周面側には複数
の通気孔５４が形成されている。また、このケーシング
５２の上端部には連結用ナット５５が配設され、この連
結用ナット５５を介しフラッシュバルブの下端部５７が
一体状に連結される。この連結用ナット５５の下部に内
方に突出状に形成されたフランジ部５５ａに前記ケーシ
ング５２のフランジ部５３が載置され、このフランジ部
５５ａの下部には垂下状にスカート部５６が一体形成さ
れている。このスカート部５６は前記通気孔５４の外方
に適当な間隔をおいて配置されるものであり、通気孔５
４内への異物の流入等を防止するものである。なお、前
記ケーシング５２の下端部には想像線で示す連結ナット
５８等を介して水洗大便器側の洗浄管が接続される。[0003] That is, the vacuum breaker 51 has a casing 52 formed in a tubular shape.
A flange portion 53 is formed at an upper end portion of the second member so as to protrude outward, and a plurality of ventilation holes 54 are formed on a peripheral surface side below the flange portion 53. A connecting nut 55 is provided at the upper end of the casing 52, and the lower end 57 of the flash valve is integrally connected via the connecting nut 55. A flange portion 53 of the casing 52 is placed on a flange portion 55a formed in a protruding shape inward at a lower portion of the connection nut 55, and a skirt portion 56 is formed integrally with the lower portion of the flange portion 55a in a hanging manner. Have been. The skirt portion 56 is disposed outside the ventilation hole 54 at an appropriate interval.
4 is to prevent foreign matter from flowing into the inside 4. A flush pipe on the flush toilet side is connected to a lower end of the casing 52 via a connection nut 58 and the like shown by imaginary lines.
【０００４】また、ケーシング５２内にはゴム製等の可
撓性弁部材５９が配設されており、この可撓性弁部材５
９は、前記ケーシング５２の内周面と僅かな隙間を形成
して垂直状に配設される薄肉状の側壁５９ａと、この側
壁５９ａの下部部位に肉厚を厚くして傾斜状に形成され
たテーパー壁部５９ｂと、このテーパー壁部５９ｂの平
坦部分相互間の折り目の底端部よりケーシング５２の軸
心に向かって一体状に延出されたリブ部５９ｃと、前記
側壁５９ａの上端部に外方向に突出状に形成された支持
フランジ部５９ｄとにより構成されており、この支持フ
ランジ部５９ｄには内側に凹み状の凹溝５９ｅが形成さ
れ、また、前記リブ部５９ｃにそれぞれの内縁側間にて
細隙が形成されている。[0004] A flexible valve member 59 made of rubber or the like is provided in the casing 52.
Reference numeral 9 denotes a thin-walled side wall 59a which is formed vertically with a slight gap formed between the inner peripheral surface of the casing 52, and a thicker portion formed in a lower portion of the side wall 59a to be inclined. A tapered wall portion 59b, a rib portion 59c extending integrally from the bottom end of the fold between the flat portions of the tapered wall portion 59b toward the axis of the casing 52, and an upper end portion of the side wall 59a. The support flange 59d is formed with a recessed groove 59e inwardly formed in the support flange 59d. A gap is formed between the edges.
【０００５】この可撓性弁部材５９の前記凹溝５９ｅ内
にフランジ部６０ａを嵌合させた状態で、可撓性弁部材
５９の上部部位には挿入部材６０が配設されている。こ
の挿入部材６０はプラスチック等の硬質素材にて形成さ
れており、倒立円錐形状に形成され、その下端部の底端
部６０ｂから前記フランジ部６０ａにかけて、例えば３
個程度の導水口Ｈが垂直に形成されている。[0005] An insertion member 60 is disposed above the flexible valve member 59 in a state where the flange portion 60a is fitted into the concave groove 59e of the flexible valve member 59. The insertion member 60 is formed of a hard material such as plastic, and is formed in an inverted conical shape. From the bottom end 60b of the lower end to the flange 60a, for example, 3
About water inlets H are formed vertically.
【０００６】このように形成されたバキュームブレーカ
５１においては、給水管に接続された図示しないフラッ
シュバルブ側からケーシング５２内に洗浄水が導水され
ると、洗浄水は導水口Ｈを通り可撓性弁部材５９に達
し、水圧によりこの可撓性弁部材５９のテーパー壁部５
９ｂを側方に押圧するとともに、側壁５９ａを側方に押
圧し、側壁５９ａを通気孔５４に密着させ、通気孔５４
からの漏水を良好に防止させ、かつリブ部５９ｃの細隙
を押し広げてケーシング５２の下方に水を通過させ、洗
浄水を下方の図示しない洗浄大便器に供給することがで
きる。In the vacuum breaker 51 formed as described above, when washing water is introduced into the casing 52 from a flash valve (not shown) connected to the water supply pipe, the washing water passes through the water inlet H and becomes flexible. Reaching the valve member 59, the tapered wall portion 5 of the flexible valve member
9b is pressed laterally, and the side wall 59a is pressed sideways to bring the side wall 59a into close contact with the ventilation hole 54.
Water can be prevented from leaking, and the narrow space of the rib portion 59c can be expanded to allow the water to pass below the casing 52, thereby supplying the flush water to a flush toilet (not shown) below.
【０００７】[0007]
【発明が解決しようとする課題】この従来のバキューム
ブレーカ５１においては、例えば、何らかの原因により
給水管側が真空状態となると、ケーシング５２内にサイ
ホン作用が生じて、通気孔５４内から外気がケーシング
５２内に導入され、この外気により可撓性弁部材５９が
挿入部材６０側に押圧されて導水口Ｈを塞ぐとともに、
リブ部５９ｃの細隙が閉じられて水洗大便器側から逆流
する汚水等を防止しようとするものであるが、可撓性弁
部材５９の側壁５９ａが垂直状であることから、負圧に
対し応答性が悪く、このため挿入部材６０に可撓性弁部
材５９が押圧されると、側壁５９ａが大きく変形を生じ
て、挿入部材６０の倒立円錐形状のテーパー縁部６０ｃ
と可撓性弁部材５９のテーパー壁部５９ｂとが重合状と
なることなく、リブ部５９ｃの細隙が大きく開いて汚水
が給水管側へ逆流する恐れがあり、また、導水口Ｈを通
り可撓性弁部材５９に上方より洗浄水が流入されたとき
に、リブ部５９ｃの細隙を通り下方へ流下する過程にお
いて、流速が増し、ケーシング５２内に負圧が生じ、こ
の負圧により側壁５９ａを外側から押圧して通気孔５４
を通りケーシング５２内に外気が吸い込まれ、この外気
の吸い込み時に笛吹き音を発生するという問題点があっ
た。In the conventional vacuum breaker 51, for example, when the water supply pipe side is evacuated for some reason, a siphon action is generated in the casing 52, and the outside air is discharged from the inside of the ventilation hole 54 to the casing 52. The flexible valve member 59 is pressed toward the insertion member 60 side by the outside air to close the water inlet H,
The slit of the rib portion 59c is closed to prevent sewage or the like flowing backward from the flush toilet side, but since the side wall 59a of the flexible valve member 59 is vertical, it is resistant to negative pressure. When the flexible valve member 59 is pressed against the insertion member 60 due to poor responsiveness, the side wall 59a is greatly deformed and the inverted conical tapered edge portion 60c of the insertion member 60 is formed.
And the tapered wall portion 59b of the flexible valve member 59 do not form a superimposed state, and there is a possibility that the narrow space of the rib portion 59c is greatly opened and the sewage flows backward to the water supply pipe side. When the washing water flows into the flexible valve member 59 from above, in the process of flowing downward through the narrow space of the rib portion 59c, the flow velocity increases, and a negative pressure is generated in the casing 52. The side wall 59a is pressed from the outside to form the ventilation hole 54.
The outside air is sucked into the casing 52 through the casing 52, and a whistling sound is generated when the outside air is sucked.
【０００８】本発明は、上記従来の問題点を解決すべく
なされたもので、給水管側に真空状態が生じた場合、可
撓性弁部材の応答性が良好で、かつリブ部の細隙の開度
を著減して汚水の逆流を防止することができ、また、ケ
ーシング内に負圧を生じて通気孔より外気が流入して、
その際に発生する笛吹き音を防止することのできるバキ
ュームブレーカを提供することを目的とするものであ
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. When a vacuum state occurs on the water supply pipe side, the responsiveness of the flexible valve member is good and the gap of the rib portion is small. , The backflow of sewage can be prevented, and a negative pressure is generated in the casing to allow outside air to flow in from the ventilation holes.
It is an object of the present invention to provide a vacuum breaker capable of preventing a whistling sound generated at that time.
【０００９】[0009]
【課題を解決するための手段】本発明は、上記従来課題
を解決するため、側面に通気孔を有する略管状のケーシ
ングと、このケーシングに内装され複数の導水口を有し
て倒立円錐形状のテーパー縁部を有する挿入部材と、こ
の挿入部材の下方に付設されて下部に略倒立円錐形状の
ガイド壁と、このガイド壁の下部に細隙を有して開閉可
能にリブ部を形成して洗浄水を通過し、かつ前記通気孔
からの漏水と逆流を防止する可撓性弁部材とからなるバ
キュームブレーカにおいて、前記可撓性弁部材のガイド
壁の上部側に伸縮可能に蛇腹部を形成して、洗浄水の給
水管側の負圧により可撓性弁部材のガイド壁を前記挿入
部材の倒立円錐形状のテーパー縁部に重合当接可能に構
成したバキュームブレーカであり、さらに、前記ケーシ
ングの内径部の通気孔の下方に中心方向へ張出すシール
座面を形成するとともに、前記可撓性弁部材の蛇腹部の
下に、前記シール座面の上方に臨み、かつ同下面の四周
にシール座面に当接可能にシール凸条を有する下部フラ
ンジ部を形成する構成としたバキュームブレーカに存す
る。SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides a generally tubular casing having a vent hole on a side surface, an inverted conical shape provided in the casing and having a plurality of water inlets. An insertion member having a tapered edge, a substantially inverted conical guide wall provided below the insertion member and formed at a lower portion, and a rib portion formed to be openable and closable with a small gap at a lower portion of the guide wall. In a vacuum breaker comprising a flexible valve member that passes through the washing water and prevents water leakage and backflow from the ventilation hole, a bellows portion is formed on the upper side of the guide wall of the flexible valve member so as to extend and contract. A vacuum breaker configured so that the guide wall of the flexible valve member can be brought into contact with the inverted conical tapered edge of the insertion member by a negative pressure on the water supply pipe side of the washing water so that the guide wall is overlapped; Through the inner diameter of A seal seat surface extending in the center direction is formed below the hole, and under the bellows portion of the flexible valve member, the seal seat surface faces upwardly of the seal seat surface, and contacts the seal seat surface on four circumferences of the lower surface. The present invention provides a vacuum breaker having a configuration in which a lower flange portion having a seal ridge is formed so as to be able to contact.
【００１０】[0010]
【作用】上記構成としたことにより、給水管側が真空状
態を生じて負圧となった場合、可撓性弁部材の蛇腹部が
応答よく短縮作動して略倒立円錐形状のガイド壁が挿入
部材の倒立円錐形状のテーパー縁部に重合当接し、リブ
部の細隙側が変形して開口することを抑止して汚水の逆
流を防止し、また、流水により可撓性弁部材のリブ部の
下側付近に負圧を生じた場合、可撓性弁部材の蛇腹部が
応答よく伸長作動して下部フランジ部のシール凸条がハ
ウジングのシール座面に当接して、通気孔からの外気の
侵入を防止して笛吹き音の発生を防止する。According to the above construction, when a negative pressure is generated due to the occurrence of a vacuum state on the water supply pipe side, the bellows portion of the flexible valve member is shortened in a responsive manner and the substantially inverted conical guide wall is inserted. Overlaps with the tapered edge of the inverted conical shape to prevent the slit side of the rib portion from being deformed and opening to prevent reverse flow of sewage, When a negative pressure is generated near the side, the bellows portion of the flexible valve member operates responsively to extend, the sealing ridge of the lower flange portion abuts against the seal seat surface of the housing, and outside air enters through the ventilation hole. To prevent the occurrence of whistling noise.
【００１１】[0011]
【実施例】次に、本発明の一実施例を図面に従って説明
すると、図１はバキュームブレーカ１の断面図を示すも
ので、従来と同様にケーシング２と連結用ナット９と挿
入部材６０と可撓性弁部材１５とより構成されている。FIG. 1 is a sectional view of a vacuum breaker 1 according to an embodiment of the present invention. As shown in FIG. It comprises a flexible valve member 15.
【００１２】このケーシング２は略管状に形成され、そ
の下部側の外周には洗浄管を接続する下部ねじ部３が形
成され、このケーシング２の内径部の所定の位置には中
心線Ｃ方向に向かって水平状にシール座面４が形成さ
れ、このシール座面４の上部壁部５の外周には連結用ナ
ット９を螺合する上部ねじ部６が螺設されるとともに、
同上部壁部５には所定の間隔で通気孔７が貫設されてい
る。また、下部ねじ部３の上部内径部にはフランジ部８
が形成されて、シール座面４径＞フランジ部８径に形成
されている。The casing 2 is formed in a substantially tubular shape, and a lower thread portion 3 for connecting a washing pipe is formed on an outer periphery on a lower side thereof. A seal seating surface 4 is formed horizontally toward the upper surface, and an upper screw portion 6 for screwing a connection nut 9 is screwed around the outer periphery of an upper wall portion 5 of the seal seating surface 4.
Vent holes 7 are provided through the upper wall 5 at predetermined intervals. In addition, a flange portion 8 is provided on the upper inner diameter portion of the lower screw portion 3.
Is formed, and the diameter of the seal seat surface 4 is larger than the diameter of the flange portion 8.
【００１３】また、連結用ナット９はケーシング２の上
部ねじ部６に螺合するねじ部１０を有し、このねじ部１
０の下方にはケーシング２の通気孔７の外方を所定の間
隔を有して覆設するスカート部１１が形成され、また、
ねじ部１０の上部側の内径部には給水管を接続するねじ
部１２が形成されている。また、このねじ部１２の下部
には従来と同様の挿入部材６０および可撓性弁部材１５
を受承する断面かぎ形状の受承片１３が形成されてい
る。The connecting nut 9 has a screw portion 10 which is screwed to the upper screw portion 6 of the casing 2.
0, a skirt portion 11 for covering the outside of the ventilation hole 7 of the casing 2 at a predetermined interval is formed.
A screw portion 12 for connecting a water supply pipe is formed in an inner diameter portion on an upper side of the screw portion 10. In addition, the insertion member 60 and the flexible valve member 15 as in the related art are provided below the screw portion 12.
A receiving piece 13 having a key-shaped cross-section for receiving the same is formed.
【００１４】また、挿入部材６０は従来と同様にプラス
チック部材によりフランジ部６０ａを有して下方に略倒
立円錐状にガイド片６０ｂが三等分位置に配設されて導
水口Ｈが形成され、この挿入部材６０の下部には可撓性
弁部材１５が取付けられている。The insertion member 60 has a flange portion 60a made of a plastic member as in the prior art, and the guide piece 60b is disposed in a substantially inverted conical shape at three equally divided positions below to form a water introduction port H. The flexible valve member 15 is attached to a lower portion of the insertion member 60.
【００１５】この可撓性弁部材１５は、例えばゴム、合
成樹脂等からなるもので、連結用ナット９の受継片１３
に係合する取付フランジ部１６を有し、この取付フラン
ジ部１６の下部には蛇腹部１７が形成され、その下部に
はケーシング２のシール座面４の上方に臨む下部フラン
ジ部１８が形成され、この下部フランジ部１８の下部に
は図２に示すように、下端部に中心線Ｃを中心として１
２０度間隔でリブ部１９を有し、このリブ部１９間の中
心部に谷部２０を有して略倒立円錐形状のガイド壁２１
が形成され、リブ部１９の中心には可撓性弁部材１５の
中心線Ｃに向かって細隙２２が形成されて、給水の通過
に際し開口可能に設けられている。また、下部フランジ
部１８の下面側外周には連続してシール凸条２３が形成
されて、シール座面４に当接可能に設けられている。The flexible valve member 15 is made of, for example, rubber, synthetic resin, or the like.
And a bellows portion 17 is formed at a lower portion of the mounting flange portion 16, and a lower flange portion 18 facing above the seal seat surface 4 of the casing 2 is formed at a lower portion thereof. As shown in FIG. 2, the lower end of the lower flange portion 18 has a center line C at its lower end.
It has rib portions 19 at intervals of 20 degrees, and has a valley portion 20 at the center between the rib portions 19 to form a guide wall 21 having a substantially inverted conical shape.
Is formed at the center of the rib portion 19 toward the center line C of the flexible valve member 15, and is provided so as to be openable when water is supplied. A seal ridge 23 is formed continuously on the outer periphery on the lower surface side of the lower flange portion 18, and is provided so as to be able to abut on the seal seat surface 4.
【００１６】このように形成されたバキュームブレーカ
１において、給水管側より洗浄水が供給されて挿入部材
６０の導水口Ｈを通り可撓性弁部材１５内に流入される
と、流下する水力により、リブ部１９の細隙２２がその
中心線Ｃより押し広げられ、洗浄水は水洗大便器へ供給
される、この細隙２２を通り下方へ洗浄水が流れるとき
に、ケーシング２内の可撓性弁部材１５の下部付近で空
気の流れが速くなり、この付近で負圧が発生することと
なり、この負圧により、ケーシング２の上部側壁５の通
気孔７より若干の外気が導入されるが、可撓性弁部材１
５はその蛇腹部１７が流下する水力により応答よく伸長
作動して下方へ伸長し、その下部フランジ部１８が下方
へ変位され、この下部フランジ部１８の下面に形成した
シール凸条２３がケーシング２の内径部に形成したシー
ル座面４に当接されて外気の吸い込みが防止され、これ
により笛吹き音の発生がなく、笛吹き音による不快感を
解消することができる。In the vacuum breaker 1 formed as described above, when the cleaning water is supplied from the water supply pipe side and flows into the flexible valve member 15 through the water introduction port H of the insertion member 60, the flowing hydraulic power causes The gap 22 of the rib portion 19 is pushed out from its center line C, and the washing water is supplied to the flush toilet. When the washing water flows downward through the gap 22, the flexible space inside the casing 2 is removed. The flow of air is increased near the lower part of the valve member 15, and a negative pressure is generated in the vicinity of the lower part. Due to this negative pressure, a small amount of outside air is introduced from the ventilation hole 7 in the upper side wall 5 of the casing 2. , Flexible valve member 1
5 is extended responsively by the hydrodynamic force of the bellows portion 17 to extend downward by responsive operation, the lower flange portion 18 is displaced downward, and the sealing ridge 23 formed on the lower surface of the lower flange portion 18 is formed by the casing 2. The abutment with the seal seating surface 4 formed on the inner diameter of the horn prevents the inhalation of outside air, thereby preventing the occurrence of a whistling sound and eliminating the discomfort caused by the whistling sound.
【００１７】また、何等かの原因で給水管側に真空状態
が生じた場合、ケーシング２の通気孔７より外気が導入
され、この外気により可撓性弁部材１５を外方より変形
しようとするものであるが、可撓性弁部材１５に形成し
た蛇腹部１７が真空状態となると応答よく縮動してガイ
ド壁２１が上動されて、挿入部材６０の倒立円錐形状の
テーパー縁部６０ｃに沿ってガイド壁２１が重合されて
その変形が著減され、リブ部１９に形成された細隙２２
の開口変形することが防止され、給水管側の真空状態に
起因する汚水の逆流現象を防止することができる。Further, when a vacuum state is generated on the water supply pipe side for some reason, outside air is introduced from the ventilation hole 7 of the casing 2, and the outside air tends to deform the flexible valve member 15 from outside. However, when the bellows portion 17 formed in the flexible valve member 15 is in a vacuum state, the bellows portion 17 is responsively contracted, the guide wall 21 is moved upward, and the inverted conical tapered edge portion 60 c of the insertion member 60 is formed. The guide wall 21 is superimposed along and the deformation thereof is remarkably reduced, and the slit 22 formed in the rib portion 19 is formed.
Can be prevented from being deformed, and the backflow phenomenon of sewage caused by the vacuum state on the water supply pipe side can be prevented.
【００１８】次に、図３には変形例を示す。すなわち、
図３に示す構造は、前記可撓性弁部材１５の下部フラン
ジ部１８とシール凸条２３を無くし、蛇腹部１７とガイ
ド壁２１間の胴体部１５ａを長く形成して、可撓性弁部
材１５の下端のリブ部１９がケーシング２のフランジ部
８の上面近傍まで達するように可撓性弁部材１５を形成
したものであり、また、ケーシング２には、通気孔７の
下部に形成したシール座面４から更に中心方向へ突出さ
せて段突部４ａを形成したものである。他の構成は前記
図１のものと同様である。Next, FIG. 3 shows a modification. That is,
The structure shown in FIG. 3 is such that the lower flange portion 18 and the sealing ridge 23 of the flexible valve member 15 are eliminated, and the body portion 15a between the bellows portion 17 and the guide wall 21 is formed longer. The flexible valve member 15 is formed so that the rib 19 at the lower end of the casing 15 reaches the vicinity of the upper surface of the flange 8 of the casing 2. A step projection 4a is formed by projecting further from the seat surface 4 toward the center. Other configurations are the same as those in FIG.
【００１９】このように構成すれば、給水管側より洗浄
水が供給されて挿入部材６０の導水口Ｈを通り可撓性弁
部材１５内に洗浄水が流入される時に、蛇腹部１７が存
在し、可撓性弁部材１５の下端部はフランジ部８に近接
しているため、下方側へ延びようとする力が可撓性弁部
材１５に働かず、洗浄水の流下する水力は法線方向に圧
力として加わり、胴体部１５ａが法線方向へ広がり、胴
体部１５ａの外周がケーシング２の段突部４ａに密着さ
れて、外気の吸い込みが防止され、笛吹き音の発生を防
止することができる。With this configuration, when the washing water is supplied from the water supply pipe side and flows through the water inlet H of the insertion member 60 into the flexible valve member 15, the bellows portion 17 is present. However, since the lower end of the flexible valve member 15 is close to the flange 8, a downward force does not act on the flexible valve member 15, and the hydraulic force flowing down the washing water is normal. Pressure is applied in the direction, the body part 15a spreads in the normal direction, and the outer periphery of the body part 15a is in close contact with the step protrusion 4a of the casing 2, so that the outside air is prevented from being sucked in and the whistling noise is prevented. Can be.
【００２０】尚、何らかの原因で給水管側に真空状態が
生じた場合には、前記図１の構造と同様に蛇腹部１７が
縮動して、ガイド壁２１が挿入部材６０の倒立円錐形状
のテーパー縁部６０ｃに重合され、汚水の逆流現象を防
止することができるものである。When a vacuum state is generated on the water supply pipe side for some reason, the bellows portion 17 is contracted similarly to the structure of FIG. It is polymerized on the tapered edge portion 60c, and can prevent the backflow phenomenon of sewage.
【００２１】[0021]
【発明の効果】本発明は上記構成としたことにより、給
水管側が真空状態を生じて負圧となった場合、可撓性弁
部材の蛇腹部が応答よく短縮作動して略倒立円錐形状の
ガイド壁が挿入部材の倒立円錐形状のテーパー縁部に重
合当接し、リブ部の細隙側が変形して開口することを抑
止して汚水の逆流を良好に防止することができる。According to the present invention, the bellows portion of the flexible valve member operates swiftly and responsively when the water supply pipe side is vacuumed and becomes a negative pressure. The guide wall overlaps the tapered edge of the inverted conical shape of the insertion member so as to prevent the slit side of the rib portion from being deformed and opening, so that the backflow of sewage can be satisfactorily prevented.
【図１】バキュームブレーカの断面図である。FIG. 1 is a sectional view of a vacuum breaker.
【図２】可撓性弁部材の斜視図である。FIG. 2 is a perspective view of a flexible valve member.
【図３】変形例を示すバキュームブレーカの断面図であ
る。FIG. 3 is a sectional view of a vacuum breaker showing a modification.
【図４】従来のバキュームブレーカの断面図である。FIG. 4 is a sectional view of a conventional vacuum breaker.
１ バキュームブレーカ ２ ケーシング ４ シール座面 ４ａ 段突部 ７ 通気孔 １５ 可撓性弁部材 １５ａ 胴体部 １７ 蛇腹部 １８ 下部フランジ部 １９ リブ部 ２１ ガイド壁 ２２ 細隙 ２３ シール凸条 ６０ 挿入部材 ６０ｃ テーパー縁部 DESCRIPTION OF SYMBOLS 1 Vacuum breaker 2 Casing 4 Seal seat surface 4a Step projection part 7 Vent hole 15 Flexible valve member 15a Body part 17 Bellows part 18 Lower flange part 19 Rib part 21 Guide wall 22 Narrow gap 23 Seal ridge 60 Inserting member 60c Taper Rim
Claims (3)
ング２と、このケーシング２に内装され複数の導水口Ｈ
を有して倒立円錐形状のテーパー縁部６０ｃを有する挿
入部材６０と、この挿入部材６０の下方に付設されて下
部に略倒立円錐形状のガイド壁２１と、このガイド壁２
１の下部に細隙２２を有して開閉可能にリブ部１９を形
成して洗浄水を通過し、かつ前記通気孔７からの漏水と
逆流を防止する可撓性弁部材１５とからなるバキューム
ブレーカ１において、前記可撓性弁部材１５のガイド壁
２１の上部側に伸縮可能に蛇腹部１７を形成して、洗浄
水の給水管側の負圧により可撓性弁部材１５のガイド壁
２１を前記挿入部材６０の倒立円錐形状のテーパー縁部
６０ｃに重合当接可能に構成したバキュームブレーカ。1. A substantially tubular casing 2 having a ventilation hole 7 on a side surface, and a plurality of water introduction ports H provided in the casing 2
An insertion member 60 having an inverted conical tapered edge portion 60c, an inverted conical guide wall 21 provided below and below the insertion member 60,
A vacuum comprising a flexible valve member 15 having a narrow portion 22 at the lower portion of the lower portion 1 so as to be capable of opening and closing and forming a rib portion 19 to allow washing water to pass therethrough and to prevent leakage from the vent hole 7 and backflow. In the breaker 1, a bellows portion 17 is formed so as to be extendable and contractible on the upper side of the guide wall 21 of the flexible valve member 15, and the guide wall 21 of the flexible valve member 15 is formed by a negative pressure on the water supply pipe side of the washing water. A vacuum breaker configured to be able to overlap the inverted conical tapered edge portion 60c of the insertion member 60.
下方に中心方向へ張出すシール座面４を形成するととも
に、前記可撓性弁部材１５の蛇腹部１７の下に、前記シ
ール座面４の上方に臨み、かつ同下面の四周にシール座
面４に当接可能にシール凸条２３を有する下部フランジ
部１８を形成する構成とした請求項１のバキュームブレ
ーカ。2. A seal seat surface (4) extending in the center direction below the ventilation hole (7) in the inner diameter portion of the casing (2), and the seal seat (4) is provided below the bellows portion (17) of the flexible valve member (15). The vacuum breaker according to claim 1, wherein a lower flange portion (18) having a sealing ridge (23) is formed on four sides of the lower surface of the lower surface so as to be in contact with the seal seat surface (4).
の胴体部１５ａが洗浄水の流下時に密着し得る段突部４
ａを、前記ケーシング２の内径部の通気孔７の下方に中
心方向に向かって突出させて形成した請求項１のバキュ
ームブレーカ。3. A stepped portion 4 to which a body portion 15a below the bellows portion 17 of the flexible valve member 15 can adhere when washing water flows down.
The vacuum breaker according to claim 1, wherein a is formed so as to protrude toward the center below the ventilation hole 7 in the inner diameter portion of the casing 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33518492A JP2725126B2 (en) | 1992-11-20 | 1992-11-20 | Vacuum breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33518492A JP2725126B2 (en) | 1992-11-20 | 1992-11-20 | Vacuum breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06158696A JPH06158696A (en) | 1994-06-07 |
| JP2725126B2 true JP2725126B2 (en) | 1998-03-09 |
Family
ID=18285701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33518492A Expired - Lifetime JP2725126B2 (en) | 1992-11-20 | 1992-11-20 | Vacuum breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2725126B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003034014A2 (en) * | 2001-10-16 | 2003-04-24 | Innovent, Llc. | Systems and methods for measuring pressure |
| JP6988037B2 (en) * | 2017-09-05 | 2022-01-05 | 株式会社ブリヂストン | trap |
-
1992
- 1992-11-20 JP JP33518492A patent/JP2725126B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06158696A (en) | 1994-06-07 |
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