JP5971853B2

JP5971853B2 - Intake valve device

Info

Publication number: JP5971853B2
Application number: JP2012223504A
Authority: JP
Inventors: ゆかり大島
Original assignee: Maezawa Kasei Kogyo KK
Current assignee: Maezawa Kasei Kogyo KK
Priority date: 2012-10-05
Filing date: 2012-10-05
Publication date: 2016-08-17
Anticipated expiration: 2032-10-05
Also published as: JP2014074483A

Description

本発明は、排水管内の圧力が外気圧より低下する際に、外気を吸引するための吸気弁を具備する吸気弁装置に関する。 The present invention relates to an intake valve device including an intake valve for sucking outside air when the pressure in a drain pipe drops below the outside air pressure.

従来から、排水器具の封水保護を目的に吸気弁が用いられている。排水管内の圧力と外気圧との圧力差が生じない通常時に、排水管内の臭気が外部に漏れないように吸気弁は、弁体にて吸気孔を閉塞する。また、排水管内の圧力が外気圧より低下する圧力低下時に、吸気弁は、外気との圧力差にて弁体が吸気孔から離間して吸気孔を開放して、外気を吸引可能な状態となる。そして、このように外気を吸引することにより、排水器具の封水を保護する。 Conventionally, intake valves have been used for the purpose of protecting the sealing of drainage equipment. The intake valve closes the intake hole with a valve body so that the odor in the drain pipe does not leak to the outside at the normal time when the pressure difference between the pressure in the drain pipe and the external pressure does not occur. In addition, when the pressure in the drain pipe drops below the atmospheric pressure, the intake valve is in a state where the valve body is separated from the intake hole due to a pressure difference with the outside air and the intake hole is opened to suck the outside air. Become. And the sealing water of a drainage device is protected by attracting outside air in this way.

この種の吸気弁を備えた吸気弁装置は、特許文献１のように壁体内に設置する場合や、特許文献２のように壁体内から天井裏にわたって設置する場合や、特許文献３のように洗面台の下部に設置する場合などがある。 An intake valve device provided with this type of intake valve is installed in a wall as in Patent Document 1, installed in a wall from the wall as in Patent Document 2, or as in Patent Document 3. There are cases where it is installed under the sink.

特開平０９−１１２７２７号公報JP 09-1112727 A 特開２００２−３０９６３９号公報JP 2002-309639 A 特開２００３−０６４７４５号公報JP 2003-064745 A

このように、吸気弁装置は建物内の様々な箇所に設置される。最近では、建物内の空間を有効に利用するために、壁体内や天井裏内を小さく設計することもある。このため、吸気弁装置のコンパクト化が求められている。 Thus, the intake valve device is installed at various locations in the building. Recently, in order to effectively use the space in the building, the interior of the wall or the back of the ceiling may be designed to be small. For this reason, downsizing of the intake valve device is required.

本発明はこのような点に鑑みてなされたもので、小さいスペースに設置できる吸気弁装置の提供を目的とする。 The present invention has been made in view of these points, and an object thereof is to provide an intake valve device that can be installed in a small space.

本発明の吸気弁装置は、排水器具からの排水が流れる排水管に接続し排水が流入する流入部、該流入部から流入する排水を排水管へ流出する流出部、および、これら流入部と流出部との間から分岐する分岐部を有する分岐継手と、前記分岐部に取り付けて、前記排水管内の圧力が外気圧より低下する際に外気を吸入する吸気弁とを具備し、該吸気弁は、外気空間に連通する吸気孔を有し前記分岐部内に収容可能な略筒状の吸気弁本体と、該吸気弁本体の内部に設け前記排水管内の圧力と外気圧との圧力差によって前記吸気孔の開閉を切り替える弁体と、該弁体が前記吸気孔を閉塞する状態を保持する保持手段と、前記分岐部内において前記給気弁本体の下側を通気可能に覆う基部とを備え、前記弁体は、前記吸気孔を閉塞可能なシール部と、前記排水管から逆流する排水にて浮揚可能なフロート部とを有し、前記フロート部は、天面部と、この天面部から下方へ筒状にのびる側面部とを有する中空形状であり、かつ、前記天面部の中央部から前記基部側へ突出する円筒状のガイド軸部を有し、前記基部には、この基部から前記フロート部の前記天面部側へ突出するガイド突起部を設け、前記ガイド軸部と前記ガイド突起部とで前記保持手段を挟持し、前記排水管内の圧力と外気圧との圧力差が生じない場合には、前記保持手段によって前記弁体が前記吸気孔を閉塞する状態を保持し、前記排水管内の圧力が外気圧より低下し圧力差が生じる場合には、前記弁体が前記吸気弁本体内を移動して前記吸気孔を開放するものである。 An intake valve device according to the present invention is connected to a drain pipe through which drainage from drainage equipment flows, and an inflow section into which drainage flows, an outflow section through which drainage flowing in from the inflow section flows out to the drain pipe, and these inflow sections and outflow A branch joint having a branch part that branches from between the part and an intake valve that is attached to the branch part and sucks outside air when the pressure in the drain pipe falls below the outside air pressure, the said substantially cylindrical intake valve body that can accommodate in a branch portion having a suction hole communicating with the outside air space, the pressure difference between the pressure and the outside pressure of the drainage tube provided inside the intake valve body A valve body that switches between opening and closing of the intake hole, holding means for holding the state where the valve body closes the intake hole, and a base part that covers the lower side of the supply valve main body in the branch portion so as to allow ventilation . The valve body includes a seal portion that can close the intake hole; A float portion that can float by drainage flowing backward from the drainage pipe, the float portion having a hollow shape having a top surface portion and a side surface portion extending in a cylindrical shape downward from the top surface portion, and A cylindrical guide shaft portion projecting from a central portion of the top surface portion toward the base portion, and a guide projection portion projecting from the base portion toward the top surface portion of the float portion; When the holding means is sandwiched between the shaft portion and the guide protrusion, and the pressure difference between the pressure in the drain pipe and the external air pressure does not occur, the valve body closes the intake hole by the holding means When the pressure in the drain pipe falls below the external pressure and a pressure difference is generated, the valve body moves in the intake valve body to open the intake hole.

また、本発明の吸気弁装置は、排水器具からの排水が流れる排水管に接続し開口端部を有する管体と、該開口端部に取り付けて、前記排水管内の圧力が外気圧より低下する際に外気を吸入する吸気弁とを具備し、該吸気弁は、外気空間に連通する吸気孔を有し前記開口端部内に収容可能な略筒状の吸気弁本体と、該吸気弁本体の内部に設け前記排水管内の圧力と外気圧との圧力差によって前記吸気孔の開閉を切り替える弁体と、該弁体が前記吸気孔を閉塞する状態を保持する保持手段と、前記開口端部内において前記給気弁本体の下側を通気可能に覆う基部とを備え、前記弁体は、前記吸気孔を閉塞可能なシール部と、前記排水管から逆流する排水にて浮揚可能なフロート部とを有し、前記フロート部は、天面部と、この天面部から下方へ筒状にのびる側面部とを有する中空形状であり、かつ、前記天面部の中央部から前記基部側へ突出する円筒状のガイド軸部を有し、前記基部には、この基部から前記フロート部の前記天面部側へ突出するガイド突起部を設け、前記ガイド軸部と前記ガイド突起部とで前記保持手段を挟持し、前記排水管内の圧力と外気圧との圧力差が生じない場合には、前記保持手段によって前記弁体が前記吸気孔を閉塞する状態を保持し、前記排水管内の圧力が外気圧より低下し圧力差が生じる場合には、前記弁体が前記吸気弁本体内を移動して前記吸気孔を開放するものである。 In addition, the intake valve device of the present invention is connected to a drain pipe through which drainage from drainage equipment flows and has an open end, and is attached to the open end, so that the pressure in the drain pipe is lower than the external pressure. comprising an intake valve for drawing in outside air in, the intake valve has a substantially cylindrical intake valve body capable of containing within said open end has a suction hole communicating with the outside air space, intake valve body A valve body that is provided inside the drain pipe and switches between opening and closing of the intake hole according to a pressure difference between the pressure in the drain pipe and the external pressure, holding means for holding the state in which the valve body closes the intake hole, and in the opening end portion And a base portion that covers the lower side of the air supply valve body so as to allow ventilation , and the valve body includes a seal portion that can close the intake hole, and a float portion that can be floated by drainage flowing backward from the drain pipe. And the float portion has a top surface portion and a tube extending downward from the top surface portion. And has a cylindrical guide shaft portion that protrudes from the center portion of the top surface portion toward the base side, and the base portion has the cylindrical portion of the float portion. When a guide projection that protrudes toward the top surface is provided, the holding means is sandwiched between the guide shaft and the guide projection, and when a pressure difference between the pressure in the drain pipe and the external pressure does not occur, When the valve body holds the state where the intake hole is closed by the holding means, and the pressure in the drain pipe falls below the outside air pressure and a pressure difference occurs, the valve body moves in the intake valve body. The intake hole is opened.

本発明の吸気弁装置によれば、吸気弁本体が分岐部の内部に収容可能であるため、小さいスペースでも設置できる。 According to the intake valve device of the present invention, since the intake valve main body can be accommodated inside the branch portion, it can be installed even in a small space.

本実施形態に係る吸気弁装置の建物内における配置を示す説明図である。It is explanatory drawing which shows arrangement | positioning in the building of the intake valve apparatus which concerns on this embodiment. 同上吸気弁装置を示す断面図である。It is sectional drawing which shows an intake valve apparatus same as the above. 同上吸気弁装置における吸気弁の分解状態を示す斜視図である。It is a perspective view which shows the decomposition | disassembly state of the intake valve in an intake valve apparatus same as the above. 第２実施形態に係る吸気弁装置を示す断面図である。It is sectional drawing which shows the intake valve apparatus which concerns on 2nd Embodiment.

以下、本実施形態の構成について図面を参照しながら説明する。 Hereinafter, the configuration of the present embodiment will be described with reference to the drawings.

図１において、１は吸気弁装置である。この吸気弁装置１は、例えば住宅などの建物２内における床下などの空間内にて、洗面台、洗濯機、トイレおよび浴槽などの排水器具３の排水管４に接続する排水管５内に設置される。 In FIG. 1, reference numeral 1 denotes an intake valve device. The intake valve device 1 is installed in a drain pipe 5 connected to a drain pipe 4 of a drainage device 3 such as a wash basin, a washing machine, a toilet, and a bathtub in a space such as a floor in a building 2 such as a house. Is done.

吸気弁装置１は、分岐継手６および吸気弁７を備える。分岐継手６は、排水器具３からの排水が流れる排水管５に接続される。 The intake valve device 1 includes a branch joint 6 and an intake valve 7. The branch joint 6 is connected to a drain pipe 5 through which drainage from the drainage device 3 flows.

分岐継手６は、流入部12と流出部14と分岐部15とを有する。流入部12は、排水管５における上流側配管部材11と接続し、この上流側配管部材11から排水が流入する。 The branch joint 6 has an inflow portion 12, an outflow portion 14, and a branch portion 15. The inflow portion 12 is connected to the upstream piping member 11 in the drain pipe 5, and drainage flows from the upstream piping member 11.

また、流出部14は、排水管５における下流側配管部材13と接続し、流入部12から流入する排水を下流側配管部材13へ流出する。 In addition, the outflow portion 14 is connected to the downstream side piping member 13 in the drain pipe 5, and drains the inflow from the inflow portion 12 to the downstream side piping member 13.

さらに、分岐部15は、流入部12と流出部14との間から分岐し、内部に吸気弁７を収容可能で外気空間と連通する。 Furthermore, the branch part 15 branches from between the inflow part 12 and the outflow part 14, can accommodate the intake valve 7 therein, and communicates with the outside air space.

流入部12は、上流側配管部材11の外径よりやや大径の上流側嵌合口16を有する。この上流側嵌合口16には上流側配管部材11を内嵌し、排水管５と流入部12とを連通する。 The inflow portion 12 has an upstream fitting port 16 having a diameter slightly larger than the outer diameter of the upstream piping member 11. An upstream side piping member 11 is fitted into the upstream side fitting port 16, and the drain pipe 5 and the inflow portion 12 are communicated with each other.

流出部14は、下流側配管部材13の外径よりやや大径の下流側嵌合口17を有する。この下流側嵌合口17には下流側配管部材13を内嵌し、排水管５と流出部14とを連通する。 The outflow portion 14 has a downstream side fitting port 17 that is slightly larger in diameter than the outer diameter of the downstream side piping member 13. A downstream side piping member 13 is fitted into the downstream side fitting port 17, and the drain pipe 5 and the outflow part 14 are communicated with each other.

分岐部15は、吸気弁７の外径よりやや大径の吸気弁嵌合口18を有する。この吸気弁嵌合口18の内部には吸気弁７を収容する。 The branch portion 15 has an intake valve fitting port 18 having a diameter slightly larger than the outer diameter of the intake valve 7. The intake valve 7 is accommodated in the intake valve fitting port 18.

吸気弁７は、排水管５内の圧力が外気圧より低下する際に、排水管５内へ外気を吸引する。 The intake valve 7 sucks outside air into the drain pipe 5 when the pressure in the drain pipe 5 falls below the external pressure.

図２および図３に示すように、吸気弁７は、吸気弁本体21と弁体22と蓋体41と保護部材42とを備える。 As shown in FIGS. 2 and 3, the intake valve 7 includes an intake valve main body 21, a valve body 22, a lid body 41, and a protection member 42.

吸気弁本体21は、合成樹脂などで形成する。この吸気弁本体21は、分岐部15の内部に収容可能な略円筒状である。そして、吸気弁本体21は、外気空間から吸引した外気を排水管５へ通気可能である。また、吸気弁本体21内には、排水管５内の圧力と外気圧との圧力差によって移動可能な弁体22を設ける。 The intake valve body 21 is made of synthetic resin or the like. The intake valve main body 21 has a substantially cylindrical shape that can be accommodated in the branch portion 15. The intake valve main body 21 can vent the outside air sucked from the outside air space to the drain pipe 5. In addition, a valve body 22 is provided in the intake valve main body 21 so as to be movable by a pressure difference between the pressure in the drain pipe 5 and the external pressure.

吸気弁本体21は、図３に示すように、吸気弁本体21の下部を構成する第１の筒部材23と、吸気弁本体21の上部を構成する第２の筒部材24とを有する。 As shown in FIG. 3, the intake valve body 21 includes a first cylinder member 23 that forms the lower part of the intake valve body 21, and a second cylinder member 24 that forms the upper part of the intake valve body 21.

第１の筒部材23は、長手方向を有する略円筒状の筒本体25と吸気孔27とを有する。 The first cylinder member 23 includes a substantially cylindrical cylinder body 25 having a longitudinal direction and an intake hole 27.

そして、筒本体25は、外周面25aおよび内周面25bを有する。また、この筒本体25の長手方向の一端である上端部25cには、この上端部25cの外周面25aから筒本体25における径方向の中心側へ突出する壁面101を形成する。 The cylinder body 25 has an outer peripheral surface 25a and an inner peripheral surface 25b. Further, a wall surface 101 that protrudes from the outer peripheral surface 25a of the upper end portion 25c to the center side in the radial direction of the cylindrical main body 25 is formed at the upper end portion 25c that is one end in the longitudinal direction of the cylindrical main body 25.

吸気孔27は、壁面101の内周縁によって円形状に形成し、筒本体25の径方向の中心から径方向の外側へ広がる。この吸気孔27は、外気空間に連通して外気が流入可能である。 The intake hole 27 is formed in a circular shape by the inner peripheral edge of the wall surface 101, and extends from the radial center of the cylinder body 25 to the outer side in the radial direction. The intake hole 27 communicates with the outside air space and allows the outside air to flow in.

壁面101の下側面である収容部102側の吸気孔27の周囲には、弁体22が接離可能な弁座部26を設ける。 A valve seat portion 26 to which the valve element 22 can contact and separate is provided around the intake hole 27 on the housing portion 102 side, which is the lower side surface of the wall surface 101.

すなわち、第１の筒部材23は、長手方向の一端である上端部25cに、吸気孔27および弁座部26を有する壁面101を備える。 That is, the first cylindrical member 23 includes a wall surface 101 having an intake hole 27 and a valve seat portion 26 at an upper end portion 25c that is one end in the longitudinal direction.

また、第１の筒部材23の他端である下端部25dは、開口しており、吸気孔27から流入する外気を通気可能な通気孔28を形成する。 The lower end 25d, which is the other end of the first cylindrical member 23, is open and forms a ventilation hole 28 through which outside air flowing from the intake hole 27 can be vented.

第１の筒部材23の内周面25bは、収容部102を形成する。この収容部102は、弁体22を移動可能に収容する。 The inner peripheral surface 25b of the first cylindrical member 23 forms the accommodating portion 102. This accommodating part 102 accommodates the valve body 22 so that a movement is possible.

収容部102には、内周面25bから径方向の内側へ突出し筒本体25の長手方向に延設する複数の、例えば３つの板状のガイド部29を等間隔に設ける。そして、弁体22は、これらガイド部29に沿って収容部102内を筒本体25の長手方向に移動し弁座部26に接離する。 The accommodating portion 102 is provided with a plurality of, for example, three plate-shaped guide portions 29 that protrude inward in the radial direction from the inner peripheral surface 25b and extend in the longitudinal direction of the cylindrical main body 25 at equal intervals. Then, the valve body 22 moves along the guide portion 29 in the accommodating portion 102 in the longitudinal direction of the cylinder main body 25 and contacts and separates from the valve seat portion 26.

筒本体25の外周面25aの他端近傍には、径方向の外側へ突出する拡径部30を周方向に沿って設ける。この拡径部30は、外径が分岐部15の内径よりやや小さく、分岐部15に係合可能である。 In the vicinity of the other end of the outer peripheral surface 25a of the cylinder main body 25, a diameter-expanded portion 30 protruding outward in the radial direction is provided along the circumferential direction. The enlarged diameter portion 30 has an outer diameter slightly smaller than the inner diameter of the branch portion 15 and can be engaged with the branch portion 15.

また、筒本体25の外周面25aの一端には、径方向の内側へ凹状に形成する複数の、例えば３つの凹溝部31を等間隔に設ける。この各凹溝部31からは、外周面25aに傾斜状に連続して形成する凹状の係合溝部32を設ける。 In addition, a plurality of, for example, three concave groove portions 31 formed in a radially inwardly concave shape are provided at one end of the outer peripheral surface 25a of the cylinder body 25 at equal intervals. Each concave groove 31 is provided with a concave engagement groove 32 formed continuously in an inclined manner on the outer peripheral surface 25a.

さらに、筒本体25の外周面25aの下端部25dの近傍には、径方向の外側へ突出する複数の、例えば２つの係合突起部33を設ける。 Further, a plurality of, for example, two engaging projections 33 projecting outward in the radial direction are provided in the vicinity of the lower end 25d of the outer peripheral surface 25a of the cylinder body 25.

また、第１の筒部材23の壁面101の弁座部26と反対側の上側面には、上方へ突出する目印突起部34を設ける。この目印突起部34は、第１の筒部材23に対する第２の筒部材24の取り付けが正確かを目視で確認する目印となる。 Further, a mark projection 34 projecting upward is provided on the upper surface of the wall surface 101 of the first cylindrical member 23 opposite to the valve seat 26. The mark protrusion 34 serves as a mark for visually confirming whether the second cylinder member 24 is correctly attached to the first cylinder member 23.

第２の筒部材24は、略円筒状の筒本体35を有する。この筒本体35は、外周面35aと内周面35bとを有する。また、筒本体35の内径は、筒本体25の外径よりやや大きい。 The second cylinder member 24 has a substantially cylindrical cylinder main body 35. The cylinder body 35 has an outer peripheral surface 35a and an inner peripheral surface 35b. Further, the inner diameter of the cylinder body 35 is slightly larger than the outer diameter of the cylinder body 25.

この筒本体35の一端である上端部35cには、この上端部35cから突出する矩形板状の複数の、例えば３つの係合片部36を等間隔に設ける。 A plurality of, for example, three engagement piece portions 36 having a rectangular plate shape protruding from the upper end portion 35c are provided at equal intervals on the upper end portion 35c which is one end of the cylinder main body 35.

筒本体35の他端である下端部35dには、筒本体35の外周面35aおよび内周面35bに対して筒本体35の他端の先端へ向かって径方向内側へ傾斜する傾斜縁103を設ける。 The lower end 35d, which is the other end of the tube body 35, has an inclined edge 103 that is inclined radially inward toward the tip of the other end of the tube body 35 with respect to the outer peripheral surface 35a and the inner peripheral surface 35b of the tube body 35. Provide.

また、筒本体35の内周面35bには、径方向の内側へ突出する複数の、例えば３つの係合突起部37を等間隔に設ける。この係合突起部37は、第１の筒部材23の凹溝部31に挿通して嵌合可能であり、また、係合溝部32に係合可能である。 In addition, a plurality of, for example, three engaging protrusions 37 protruding inward in the radial direction are provided on the inner peripheral surface 35b of the cylinder body 35 at equal intervals. The engagement protrusion 37 can be inserted through the recessed groove 31 of the first cylindrical member 23 and can be engaged with the engagement groove 32.

そして、係合突起部37を凹溝部31に挿通して嵌合する状態から、係合突起部37が係合溝部32内を移動するように、第１の筒部材23に対して第２の筒部材24を回動する。これにより、係合突起部37が係合溝部32に螺合するように係合する。また、第１の筒部材23に対して第２の筒部材24を位置決めし、第１の筒部材23と第２の筒部材24との取付状態を保持する。 Then, from the state in which the engaging protrusion 37 is inserted into and fitted into the recessed groove portion 31, the second protrusion with respect to the first cylindrical member 23 is moved so that the engaging protrusion 37 moves in the engaging groove portion 32. The cylindrical member 24 is rotated. As a result, the engagement protrusion 37 is engaged with the engagement groove 32 so as to be screwed. Further, the second cylinder member 24 is positioned with respect to the first cylinder member 23, and the attachment state between the first cylinder member 23 and the second cylinder member 24 is maintained.

図２に示すような、第２の筒部材24の係合突起部37が第１の筒部材23の凹溝部31に嵌合する状態で、第１の筒部材23の拡径部30と第２の筒部材24の筒本体35の傾斜縁103とに挟まれる第１の筒部材23の筒本体25の外周面25aは、固定パッキン38を係止可能なパッキン係止部39を形成する。 As shown in FIG. 2, in the state where the engaging projection 37 of the second cylindrical member 24 is fitted in the concave groove 31 of the first cylindrical member 23, The outer peripheral surface 25a of the cylinder body 25 of the first cylinder member 23 sandwiched between the inclined edge 103 of the cylinder body 35 of the second cylinder member 24 forms a packing locking portion 39 that can lock the fixed packing 38.

固定パッキン38は、拡径部30の上側に接触するように筒本体25の外周面25aに装着する。そして、係合突起部37が係合溝部32内を移動するように第１の筒部材23に対して第２の筒部材24を回動すると、パッキン係止部39の幅が狭くなる。すなわち、第１の筒部材23の拡径部30と第２の筒部材24の傾斜縁103とは固定パッキン38を幅方向に押圧する。このため、固定パッキン38は径方向の外側へ突出するように変形する。この変形状態の固定パッキン38は、吸気弁本体21を分岐部15に収容する状態で、分岐部15と吸気弁本体21とを水密に固定する。 The fixed packing 38 is attached to the outer peripheral surface 25a of the cylinder main body 25 so as to contact the upper side of the enlarged diameter portion 30. And if the 2nd cylinder member 24 is rotated with respect to the 1st cylinder member 23 so that the engagement protrusion part 37 may move in the engagement groove part 32, the width | variety of the packing latching | locking part 39 will become narrow. That is, the enlarged diameter portion 30 of the first cylindrical member 23 and the inclined edge 103 of the second cylindrical member 24 press the fixed packing 38 in the width direction. For this reason, the fixed packing 38 is deformed so as to protrude outward in the radial direction. The fixed packing 38 in the deformed state fixes the branch portion 15 and the intake valve main body 21 in a watertight manner in a state where the intake valve main body 21 is accommodated in the branch portion 15.

そして、吸気弁本体21は、第１の筒部材23と第２の筒部材24との取付状態を保持する状態で、分岐部15に収納可能である。つまり、吸気弁本体21を分岐部15に収容する状態で、筒本体25および筒本体35は吸気弁嵌合口18内に位置する。 The intake valve main body 21 can be stored in the branch portion 15 in a state in which the attachment state of the first cylinder member 23 and the second cylinder member 24 is maintained. That is, the cylinder body 25 and the cylinder body 35 are located in the intake valve fitting port 18 in a state where the intake valve body 21 is accommodated in the branch portion 15.

なお、図３に示すように、固定パッキン38と第２の筒部材24の傾斜縁103との間には、第２の筒部材24を回動しやすくするため、例えば合成樹脂などで形成する滑り片40を設ける。 As shown in FIG. 3, between the fixed packing 38 and the inclined edge 103 of the second cylinder member 24, the second cylinder member 24 is formed of, for example, a synthetic resin so as to facilitate the rotation. A sliding piece 40 is provided.

吸気弁本体21の上部、すなわち、第２の筒部材24の筒本体35の上端部35c側には、蓋体41を設ける。蓋体41は、合成樹脂などで形成し、吸気孔27の上方を通気可能に覆う。 A lid 41 is provided on the upper portion of the intake valve body 21, that is, on the upper end portion 35c side of the cylinder body 35 of the second cylinder member 24. The lid body 41 is formed of synthetic resin or the like and covers the upper side of the air intake hole 27 so as to allow ventilation.

さらに、吸気弁本体21の下部、すなわち第１の筒部材23の筒本体25の下端部25d側には、保護部材42を設ける。保護部材42は、合成樹脂などで形成し、吸気弁本体21内に弁体22を収容する状態にて通気孔28を通気可能に覆う。 Further, a protective member 42 is provided at the lower part of the intake valve body 21, that is, on the lower end portion 25d side of the cylinder body 25 of the first cylinder member 23. The protective member 42 is formed of synthetic resin or the like, and covers the vent hole 28 so as to allow ventilation in a state where the valve body 22 is accommodated in the intake valve main body 21.

蓋体41は、円盤状の蓋本体43を有する。この蓋本体43には、周縁から下方に突出するように、矩形板状の被係合突出部44を複数、例えば３つ設ける。 The lid 41 has a disc-shaped lid body 43. The lid main body 43 is provided with a plurality of, for example, three engagement protrusions 44 having a rectangular plate shape so as to protrude downward from the peripheral edge.

この被係合突出部44は、第２の筒部材24の係合片部36と係合可能である。また、被係合突出部44の外周側には、第１の筒部材23に対して第２の筒部材24を回動する際に滑り止めとなる溝104を設ける。 The engaged projecting portion 44 can be engaged with the engaging piece portion 36 of the second cylindrical member 24. Further, a groove 104 is provided on the outer peripheral side of the engaged projecting portion 44 to prevent slipping when the second cylinder member 24 is rotated with respect to the first cylinder member 23.

係合片部36と被係合突出部44との係合は、蓋本体43を吸気孔27から離間する状態で固定して、蓋体41は吸気孔27の上方を覆う。なお、蓋体41は、吸気弁本体21が分岐部15に収容する状態では、蓋体41の蓋本体43が分岐部15から上方へ突出する。 The engagement between the engagement piece 36 and the engaged protrusion 44 fixes the lid main body 43 in a state of being separated from the intake hole 27, and the lid 41 covers the intake hole 27. In the state where the intake valve main body 21 is housed in the branch portion 15, the lid main body 43 of the lid body 41 protrudes upward from the branch portion 15.

蓋本体43には、円形状に開口する目印開口部45を設ける。そして、第２の筒部材24に蓋体41を取り付けた状態で、第１の筒部材23に第２の筒部材24を取り付けると、第２の筒部材24の回動に伴って、第１の筒部材23の目印突起部34と目印開口部45との相対位置が変化する。第１の筒部材23と第２の筒部材24とを正確な位置決め状態で取り付けると、目印突起部34の先端を目印開口部45から視認できる。これにより、第１の筒部材23と第２の筒部材24とが正確な位置決め状態であることを目視で確認できる。 The lid body 43 is provided with a mark opening 45 that opens in a circular shape. When the second cylinder member 24 is attached to the first cylinder member 23 in a state where the lid 41 is attached to the second cylinder member 24, the first cylinder member 24 is turned along with the rotation of the second cylinder member 24. The relative position between the mark projection 34 and the mark opening 45 of the cylindrical member 23 changes. When the first cylinder member 23 and the second cylinder member 24 are attached in an accurate positioning state, the tip of the mark protrusion 34 can be viewed from the mark opening 45. Thereby, it can visually confirm that the 1st cylinder member 23 and the 2nd cylinder member 24 are an exact positioning state.

保護部材42は、排水管５からの排水の逆流にともなう夾雑物の吸気弁本体21内への進入を防止する。 The protection member 42 prevents foreign matter from entering the intake valve main body 21 due to the backflow of drainage from the drain pipe 5.

また、保護部材42は、幅狭の略円筒状の周縁部105の一端を開口し、他端に吸気弁本体21を通気する外気が通気可能な通気開孔部46を形成する基部47を有する。 Further, the protective member 42 has a base portion 47 that opens at one end of a substantially cylindrical peripheral portion 105 having a narrow width, and forms a ventilation opening portion 46 through which the outside air that ventilates the intake valve main body 21 can be vented at the other end. .

周縁部105には、嵌合部48を設ける。嵌合部48は、基部47より外径が大きく、かつ、内径が第１の筒部材23の筒本体25の下端部25dの外径よりやや大きい。嵌合部48には、筒本体25の下端部25dに嵌合可能な溝部106を周縁部105の内側に形成する。 The peripheral portion 105 is provided with a fitting portion 48. The fitting portion 48 has an outer diameter larger than that of the base portion 47 and has an inner diameter slightly larger than the outer diameter of the lower end portion 25d of the cylinder body 25 of the first cylinder member 23. In the fitting portion 48, a groove portion 106 that can be fitted to the lower end portion 25 d of the cylinder body 25 is formed inside the peripheral edge portion 105.

また、基部47の中央部には、ガイド突起部49を設ける。ガイド突起部49は、基部47から保護部材42の一端である開口側の吸気弁本体21へ向かって突出する円筒状の突起である。 A guide projection 49 is provided at the center of the base 47. The guide protrusion 49 is a cylindrical protrusion that protrudes from the base 47 toward the intake valve body 21 on the opening side that is one end of the protection member 42.

嵌合部48には、周縁部105の一端である開口側の先端部107に、周縁部105の内周面から外周面側へ凹状に形成する被係合溝部50を設ける。この被係合溝部50は、第１の筒部材23の係合突起部33に係合可能である。被係合溝部50は、複数、例えば２つ設ける。 The engagement portion 48 is provided with an engaged groove portion 50 that is formed in a concave shape from the inner peripheral surface of the peripheral portion 105 to the outer peripheral surface side at the opening-side tip portion 107 that is one end of the peripheral portion 105. The engaged groove portion 50 can be engaged with the engaging protrusion 33 of the first cylindrical member 23. A plurality of, for example, two engaged groove portions 50 are provided.

また、嵌合部48の先端部107には、保護部材42の外周面から径方向中心側へ凹状に形成する凹溝部51を設ける。凹溝部51は、メンテナンスなどで第１の筒部材23から保護部材42を取り外す際に、治具や爪などを挿入可能である。 In addition, a concave groove portion 51 that is formed in a concave shape from the outer peripheral surface of the protective member 42 toward the radial center side is provided at the distal end portion 107 of the fitting portion 48. The concave groove 51 can be inserted with a jig or a claw when the protective member 42 is removed from the first cylindrical member 23 for maintenance or the like.

弁体22は、内部が空洞の中空形状で、排水管５から逆流する排水に浮揚可能なフロート部53と、弁座部26に着座して吸気孔27を閉塞可能なシール部52とを有する。 The valve body 22 has a hollow shape with a hollow inside, and has a float portion 53 that can float on drainage that flows backward from the drain pipe 5, and a seal portion 52 that can sit on the valve seat portion 26 and close the intake hole 27. .

フロート部53は、吸気弁本体21の収容部102において、弁座部26側となる上端側に位置し、外径が第１の筒部材23のガイド部29間よりやや小径な円盤状の天面部54を有する。また、この天面部54の周縁からは、弁座部26側の上側面と反対側の下側面108の面方向へ円筒状の側面部55を垂直に延設する。 The float portion 53 is located on the upper end side on the valve seat portion 26 side in the accommodating portion 102 of the intake valve main body 21 and has a disk-shaped ceiling whose outer diameter is slightly smaller than that between the guide portions 29 of the first cylindrical member 23. A surface portion 54 is provided. Further, from the peripheral edge of the top surface portion 54, a cylindrical side surface portion 55 is vertically extended in the surface direction of the lower side surface 108 opposite to the upper side surface on the valve seat portion 26 side.

すなわち、フロート部53は、側面部55の一端を天面部54にて閉塞し、側面部55の他端を開口する中空形状である。 That is, the float portion 53 has a hollow shape in which one end of the side surface portion 55 is closed by the top surface portion 54 and the other end of the side surface portion 55 is opened.

シール部52は、弁体22の天面部54における弁座部26側の面、すなわち上側面であるシール面56と、このシール面56上に配設するシールパッキン57と、このシールパッキン57上に配設するシール座金58とで構成する。 The seal portion 52 includes a surface on the valve seat portion 26 side of the top surface portion 54 of the valve body 22, that is, a seal surface 56 that is an upper surface, a seal packing 57 disposed on the seal surface 56, and a seal packing 57 on the seal packing 57. And a seal washer 58 disposed on the surface.

シール面56の径方向の中心には、シール面56から突出する挿通突起部59を設ける。この挿通突起部59の基端部の周囲には、シール面56から突出し、シールパッキン57およびシール座金58をシール面56上に係止するシール係止部60を設ける。シールパッキン57は、第１の筒部材23の弁座部26に着座して吸気孔27を閉塞する。シール座金58は、シールパッキン57の密着性を向上するために、シールパッキン57とシール係止部60との間に配置する。 An insertion protrusion 59 that protrudes from the seal surface 56 is provided at the center of the seal surface 56 in the radial direction. Around the base end portion of the insertion protrusion 59, there is provided a seal locking portion 60 that protrudes from the seal surface 56 and locks the seal packing 57 and the seal washer 58 on the seal surface 56. The seal packing 57 is seated on the valve seat portion 26 of the first cylindrical member 23 and closes the intake hole 27. The seal washer 58 is disposed between the seal packing 57 and the seal locking portion 60 in order to improve the adhesion of the seal packing 57.

そして、シール部52が弁座部26に着座する状態では、挿通突起部59が吸気孔27から突出し、シール面56上に配設するシールパッキン57が吸気孔27の縁部に密着し、吸気孔27を閉塞する。 In a state where the seal portion 52 is seated on the valve seat portion 26, the insertion protrusion 59 protrudes from the intake hole 27, and the seal packing 57 disposed on the seal surface 56 is in close contact with the edge of the intake hole 27. The hole 27 is closed.

ここで、フロート部53には、天面部54の下側面108の中央部から下方へ突出する円筒状のガイド軸部61を設ける。 Here, the float portion 53 is provided with a cylindrical guide shaft portion 61 that protrudes downward from the center portion of the lower surface 108 of the top surface portion 54.

このガイド軸部61は、内径がガイド突起部49の外径よりやや大径であり、ガイド突起部49に摺動自在に外嵌する。 The guide shaft portion 61 has an inner diameter slightly larger than the outer diameter of the guide projection portion 49, and is slidably fitted to the guide projection portion 49.

また、ガイド軸部61の内径中心には、挿通突起部59内から下方へ突出する棒状のばね保持部62を設ける。 Further, a rod-shaped spring holding portion 62 that protrudes downward from the insertion projection portion 59 is provided at the inner diameter center of the guide shaft portion 61.

このばね保持部62は、外径がガイド突起部49の内周よりやや小径であり、ガイド突起部49に摺動自在に内嵌する。 The spring holding portion 62 has an outer diameter that is slightly smaller than the inner circumference of the guide projection 49, and is slidably fitted into the guide projection 49.

このばね保持部62には、シール部52が弁座部26に着座して弁体22が吸気孔27を閉塞する状態を保持する保持手段としてのばね部材63を取り付ける。 A spring member 63 is attached to the spring holding portion 62 as a holding means for holding the seal portion 52 seated on the valve seat portion 26 and the valve body 22 closing the intake hole 27.

すなわち、図２に示すように、ばね保持部62とガイド突起部49とは、ばね部材63を挟持して嵌合する。これにより、吸気弁本体21内において、ばね部材63の付勢力は、弁体22をガイド突起部49に対して上方に付勢する。すなわち、ばね部材63の付勢力は、シール部52が弁座部26に着座して吸気孔27を閉塞する状態を保持する。 That is, as shown in FIG. 2, the spring holding portion 62 and the guide projection portion 49 are fitted with the spring member 63 interposed therebetween. Thereby, in the intake valve main body 21, the urging force of the spring member 63 urges the valve body 22 upward with respect to the guide protrusion 49. That is, the biasing force of the spring member 63 maintains the state where the seal portion 52 is seated on the valve seat portion 26 and closes the intake hole 27.

次に、本実施形態の作用および効果を説明する。 Next, the operation and effect of this embodiment will be described.

排水管５内の圧力と外気圧とに圧力差が生じない通常時には、吸気弁装置１のばね部材63が、弁体22を吸気孔27側に付勢し、弁体22が弁座部26に着座し吸気孔27を閉塞する状態を保持する。 During normal times when there is no pressure difference between the pressure in the drain pipe 5 and the external air pressure, the spring member 63 of the intake valve device 1 biases the valve body 22 toward the intake hole 27, and the valve body 22 is the valve seat portion 26. The state in which the air intake hole 27 is closed is held.

また、排水器具３からの排水が排水管５内を流動し排水管５内の圧力が低下して、排水管５内の圧力と外気圧とに圧力差が生じる圧力低下時は、その圧力差によって、弁体22がばね部材63の付勢力に抗してシール部52が弁座部26から離間するように吸気弁本体21内を下方に移動し、吸気孔27を開放する。 In addition, when the drainage from the drainage device 3 flows in the drainage pipe 5 and the pressure in the drainage pipe 5 is reduced to cause a pressure difference between the pressure in the drainage pipe 5 and the external pressure, the pressure difference As a result, the valve body 22 moves downward in the intake valve body 21 so that the seal portion 52 is separated from the valve seat portion 26 against the urging force of the spring member 63, and the intake hole 27 is opened.

吸気孔27を開放すると、外気空間からの外気は、吸気孔27を通って吸気弁本体21内へ通気し、通気孔28から排水管５へ通気する。 When the intake hole 27 is opened, outside air from the outside air space passes through the intake hole 27 into the intake valve main body 21 and then flows from the vent hole 28 to the drain pipe 5.

排水管５内に外気が通気すると、排水管５内の圧力と外気圧との圧力差がなくなる。このため、外気空間からは弁体22に圧力が作用しなくなる。そして、弁体22は、ばね部材63の付勢力によって吸気弁本体21内を上方へ移動しシール部52が弁座部26に着座して、吸気孔27を閉塞する。 When the outside air is ventilated in the drain pipe 5, the pressure difference between the pressure in the drain pipe 5 and the external pressure is eliminated. For this reason, pressure does not act on the valve body 22 from the outside air space. The valve body 22 moves upward in the intake valve main body 21 by the urging force of the spring member 63, the seal portion 52 is seated on the valve seat portion 26, and the intake hole 27 is closed.

吸気弁７は、弁体22を保持する保持手段としてのばね部材63を備えている。このため、上記特許文献１や特許文献３などの従来の自重式の構成に比べて弁体22を小さく設計しても、本実施形態の吸気弁装置１では、通常時に正確に吸気孔27を閉塞できるとともに、吸気孔27を閉塞する状態を確実に保持できる。 The intake valve 7 includes a spring member 63 as a holding unit that holds the valve body 22. For this reason, even if the valve body 22 is designed to be smaller than the conventional self-weighting configuration such as Patent Document 1 and Patent Document 3 described above, the intake valve device 1 of the present embodiment accurately defines the intake hole 27 at the normal time. While being able to close, the state which block | closes the intake hole 27 can be hold | maintained reliably.

このため、弁体22を小さく設計できるとともに、吸気弁本体21を分岐部15の内部に収容可能な大きさにできる。 Therefore, the valve body 22 can be designed to be small, and the intake valve main body 21 can be sized to be accommodated in the branch portion 15.

そして、吸気弁本体21が分岐部15の内部に収容可能であるため、吸気弁装置１をコンパクトに設計でき、小さいスペースに設置できる。 And since the intake valve main body 21 can be accommodated in the branch part 15, the intake valve device 1 can be designed compactly and installed in a small space.

ばね部材63の付勢力により、弁体22が吸気孔27を閉塞状態に保持できるため、吸気弁７は、簡単な構成で閉塞状態を保持でき、容易に製造できる。 Since the valve body 22 can hold the intake hole 27 in the closed state by the biasing force of the spring member 63, the intake valve 7 can be held in the closed state with a simple configuration and can be easily manufactured.

弁体22は、シール部52を有するため、弁座部26に着座する際にシール部52は吸気孔27を確実に閉塞できる。 Since the valve body 22 has the seal portion 52, the seal portion 52 can reliably close the intake hole 27 when seated on the valve seat portion 26.

このシール部52は、シール面56にシールパッキン57とシール座金58とを設ける構成である。このため、シール部52は、シールパッキン57とシール座金58により弁座部26の周縁に密着しやすく、吸気孔27を確実に閉塞できる。 The seal portion 52 is configured to provide a seal packing 57 and a seal washer 58 on the seal surface 56. For this reason, the seal portion 52 is easily adhered to the periphery of the valve seat portion 26 by the seal packing 57 and the seal washer 58, and the intake hole 27 can be reliably closed.

また、弁体22は、排水管５から逆流する排水にて浮揚可能なフロート部53を有する。このため、吸気孔27が開放状態にて下流側配管部材13から流出部14へ排水が逆流する場合、フロート部53によって弁体22が浮揚し、吸気孔27を閉塞して、排水の流出を防止できる。 Further, the valve body 22 has a float portion 53 that can be floated by drainage flowing backward from the drain pipe 5. For this reason, when the drainage flows backward from the downstream piping member 13 to the outflow part 14 with the intake hole 27 open, the valve body 22 floats by the float part 53, closes the intake hole 27, and discharges the drainage. Can be prevented.

例えば、ばね部材63が腐食などによって付勢力を喪失すると、吸気孔27は常に開放状態になる。しかし、本実施形態の弁体22は、フロート部53を有している。このため、排水が逆流する場合には、フロート部53によって弁体22が浮揚し、吸気孔27を確実に閉塞できる。したがって、本実施形態の弁体22は、弁体22をばね部材63のみによって閉塞する構成よりも排水が流出するリスクを更に低下できる。 For example, when the spring member 63 loses the urging force due to corrosion or the like, the intake hole 27 is always open. However, the valve body 22 of the present embodiment has a float part 53. For this reason, when the drainage flows backward, the valve body 22 is floated by the float 53, and the intake hole 27 can be reliably closed. Therefore, the valve body 22 of the present embodiment can further reduce the risk of drainage of the drainage than the configuration in which the valve body 22 is closed only by the spring member 63.

このフロート部53は、天面部54と側面部55とを有する中空形状であるため、逆流する排水により確実に浮揚できるとともに、簡単な構成で容易に製造できる。 Since the float portion 53 has a hollow shape having a top surface portion 54 and a side surface portion 55, the float portion 53 can be reliably floated by the backflowing drainage and can be easily manufactured with a simple configuration.

吸気弁本体21は、第１の筒部材23の下端部に通気孔28からの夾雑物の進入を防止する保護部材42を設けるため、吸気弁本体21内には夾雑物が進入しにくい。このため、夾雑物の進入による弁体22の作動不良を防止できる。 Since the intake valve main body 21 is provided with a protective member 42 that prevents the entry of foreign substances from the vent hole 28 at the lower end portion of the first cylindrical member 23, the foreign substances are less likely to enter the intake valve main body 21. For this reason, it is possible to prevent malfunction of the valve body 22 due to the entry of foreign substances.

また、吸気弁本体21は、第２の筒部材24に蓋体41を設けるため、外気空間に連通する吸気孔27へのゴミや埃などの進入を防止でき、汚れが付着しにくい。このため、汚れの付着による弁体22の作動不良を防止できる。 In addition, since the intake valve main body 21 is provided with the lid 41 on the second cylindrical member 24, it is possible to prevent the entry of dust and dirt into the intake hole 27 communicating with the outside air space, and dirt is difficult to adhere. For this reason, it is possible to prevent malfunction of the valve body 22 due to adhesion of dirt.

さらに、吸気弁本体21は、第１の筒部材23と第２の筒部材24とでパッキン係止部39を構成する。第１の筒部材23に第２の筒部材24を取り付けることにより、固定パッキン38が径方向の外側へ突出するように変形して、吸気弁本体21と分岐部15とを水密に固定可能な状態となる。このため、第１の筒部材23の外周面に予め固定パッキン38を嵌合し、第１の筒部材23に第２の筒部材24を取り付けるだけで、固定パッキン38を容易に設置できる。また、固定パッキン38は、分岐部15と吸気弁本体21とを水密に固定できる。 Further, in the intake valve main body 21, the first cylindrical member 23 and the second cylindrical member 24 constitute a packing locking portion 39. By attaching the second cylindrical member 24 to the first cylindrical member 23, the fixed packing 38 is deformed so as to protrude outward in the radial direction, and the intake valve main body 21 and the branch portion 15 can be fixed in a watertight manner. It becomes a state. For this reason, the fixed packing 38 can be easily installed simply by fitting the fixed packing 38 to the outer peripheral surface of the first cylindrical member 23 in advance and attaching the second cylindrical member 24 to the first cylindrical member 23. The fixed packing 38 can fix the branch portion 15 and the intake valve main body 21 in a watertight manner.

また、吸気弁本体21には、収容部102に弁体22の移動を案内するガイド部29を設ける。このため、弁体22は、ガイド部29に沿って移動でき、排水管５内の圧力と外気圧との圧力差によって正確に移動できる。 Further, the intake valve main body 21 is provided with a guide portion 29 that guides the movement of the valve body 22 in the accommodating portion 102. For this reason, the valve body 22 can move along the guide part 29, and can move accurately by the pressure difference between the pressure in the drain pipe 5 and the external air pressure.

さらに、吸気弁本体21には、外周面25aに拡径部30を設ける。このため、この拡径部30に固定パッキン38を係止する状態にて、第１の筒部材23と第２の筒部材24とを嵌合でき、固定パッキン38を正確に設置できる。 Further, the intake valve main body 21 is provided with an enlarged diameter portion 30 on the outer peripheral surface 25a. Therefore, the first cylinder member 23 and the second cylinder member 24 can be fitted in a state where the fixed packing 38 is locked to the enlarged diameter portion 30, and the fixed packing 38 can be accurately installed.

また、吸気弁本体21には、固定パッキン38と第２の筒部材24の傾斜縁103との間に滑り片40を設ける。このため、第１の筒部材23に第２の筒部材24を取り付ける際に、第２の筒部材24が回動しやすくなり、第１の筒部材23と第２の筒部材24と固定パッキン38とを正確かつ容易に取り付けできる。 The intake valve body 21 is provided with a sliding piece 40 between the fixed packing 38 and the inclined edge 103 of the second cylindrical member 24. For this reason, when attaching the 2nd cylinder member 24 to the 1st cylinder member 23, the 2nd cylinder member 24 becomes easy to rotate, and the 1st cylinder member 23, the 2nd cylinder member 24, and fixed packing 38 can be attached accurately and easily.

さらに、吸気弁本体21には、第１の筒部材23に凹溝部31および係合溝部32を設ける。このため、第１の筒部材23に対して第２の筒部材24を強固かつ正確に取り付けやすい。 Further, the intake valve main body 21 is provided with a concave groove portion 31 and an engagement groove portion 32 in the first cylindrical member 23. For this reason, it is easy to attach the second cylinder member 24 firmly and accurately to the first cylinder member 23.

また、吸気弁本体21は、第１の筒部材23に係合突起部33を設け、保護部材42にこの係合突起部33と係合可能な被係合溝部50を設ける。このため、第１の筒部材23に対して保護部材42を強固かつ正確に取り付けやすい。 In addition, the intake valve main body 21 is provided with an engaging projection 33 on the first cylindrical member 23 and an engaged groove 50 that can be engaged with the engaging projection 33 on the protection member 42. For this reason, it is easy to attach the protection member 42 firmly and accurately to the first cylindrical member 23.

さらに、吸気弁本体21には、第１の筒部材23に目印突起部34を設け、蓋体41には目印開口部45を設ける。このため、第１の筒部材23に対して第２の筒部材24が正確に取り付けられているかを目視で確認できる。 Further, the intake valve body 21 is provided with a mark projection 34 on the first cylinder member 23, and a mark opening 45 is provided on the lid 41. For this reason, it can be visually confirmed whether or not the second cylindrical member 24 is correctly attached to the first cylindrical member 23.

なお、上記本実施形態では、吸気弁７を分岐継手６の分岐部15に取り付ける構成とした。しかしながら、このような構成には限定されない。例えば図１の吸気弁装置８のように、流入路9aおよび流出路9bを有する排水管９に接続する管体としての分岐路9cの端部に位置する開口端部10に吸気弁７を取り付ける構成にしてもよい。この構成では、吸気弁本体21を開口端部10の内部に収容する。 In the present embodiment, the intake valve 7 is attached to the branch portion 15 of the branch joint 6. However, it is not limited to such a configuration. For example, as in the intake valve device 8 of FIG. 1, the intake valve 7 is attached to the opening end portion 10 located at the end portion of the branch passage 9c as a tubular body connected to the drain pipe 9 having the inflow passage 9a and the outflow passage 9b. It may be configured. In this configuration, the intake valve main body 21 is housed inside the open end 10.

本実施形態の吸気弁７は、保持手段としてばね部材63を設け、ばね部材63の付勢力により弁体22が吸気孔27を閉塞する状態を保持する構成とした。しかしながら、このような構成には限定されない。保持手段は、弁体22が吸気孔27を閉塞する状態を保持できる構成であれば、例えば磁力を利用する構成や弁体22の自重を利用する構成などでもよい。但し、自重を利用する構成では、吸気孔27を大きくできず十分な通気量の確保が難しい。したがって、保持手段はばね部材や磁力を利用する構成が好ましい。 The intake valve 7 of the present embodiment has a configuration in which a spring member 63 is provided as a holding means, and the valve body 22 holds the intake hole 27 by the urging force of the spring member 63. However, it is not limited to such a configuration. The holding means may be, for example, a configuration using magnetic force or a configuration using the dead weight of the valve body 22 as long as the valve body 22 can hold the state closing the intake hole 27. However, in the configuration that uses its own weight, it is difficult to make the intake hole 27 large and it is difficult to secure a sufficient air flow rate. Therefore, it is preferable that the holding means uses a spring member or a magnetic force.

吸気弁本体21は、第１の筒部材23と第２の筒部材24とを有する構成としたが、このような構成には限定されず、分岐部15に収容可能で内部で弁体22が移動可能な構成であればよい。 The intake valve main body 21 is configured to include the first cylindrical member 23 and the second cylindrical member 24. However, the configuration is not limited to such a configuration, and the intake valve body 21 can be accommodated in the branch portion 15 so that the valve body 22 is contained therein. Any movable configuration may be used.

また、吸気弁本体21は、保護部材42を取り付ける構成としたが、このような構成には限定されず、保護部材42を設けない構成にしてもよい。 In addition, the intake valve main body 21 is configured to be attached with the protection member 42. However, the configuration is not limited to such a configuration, and the protection member 42 may not be provided.

さらに、吸気弁本体21は、蓋体41を取り付ける構成としたが、このような構成には限定されず、蓋体41を設けない構成にしてもよい。 Furthermore, although the intake valve body 21 is configured to be attached with the lid 41, the configuration is not limited to such a configuration, and the lid 41 may not be provided.

また、吸気弁本体21は、第１の筒部材23と第２の筒部材24とでパッキン係止部39を形成し、このパッキン係止部39に固定パッキン38を固定する構成としたが、このような構成には限定されず、固定パッキン38を固定する箇所を別個に設けてもよい。 In addition, the intake valve main body 21 has a structure in which the first cylindrical member 23 and the second cylindrical member 24 form a packing locking portion 39 and the fixed packing 38 is fixed to the packing locking portion 39. It is not limited to such a structure, You may provide the location which fixes the fixed packing 38 separately.

さらに、吸気弁本体21は、固定パッキン38を設ける構成には限定されず、固定パッキン38を用いない構成にしてもよい。 Further, the intake valve main body 21 is not limited to the configuration in which the fixed packing 38 is provided, and may be configured not to use the fixed packing 38.

また、固定パッキン38を設ける構成にする場合には、第１の筒部材23に第２の筒部材24を取り付けることにより、固定パッキン38が径方向外側に変形する構成には限定されず、固定パッキン38は適宜設計可能である。 Further, when the fixed packing 38 is configured to be provided, the second cylindrical member 24 is attached to the first cylindrical member 23 so that the fixed packing 38 is not limited to the configuration in which the fixed packing 38 is deformed radially outward. The packing 38 can be designed as appropriate.

さらに、吸気弁本体21は、固定パッキン38と第２の筒部材24の下端縁との間に滑り片40を設ける構成に限定されず、滑り片40を設けない構成にしてもよい。 Further, the intake valve main body 21 is not limited to the configuration in which the sliding piece 40 is provided between the fixed packing 38 and the lower end edge of the second cylindrical member 24, and may be configured not to provide the sliding piece 40.

また、吸気弁本体21は、内部に弁体22の移動を案内する板状のガイド部29を設ける構成としたが、このような構成には限定されず、ガイド部29を設けない構成にしてもよい。また、ガイド部29を設ける構成にする場合には、ガイド部29の数や形状は適宜設計できる。 In addition, the intake valve body 21 has a configuration in which a plate-shaped guide portion 29 that guides the movement of the valve body 22 is provided inside, but the configuration is not limited to such a configuration, and the guide portion 29 is not provided. Also good. In the case where the guide portion 29 is provided, the number and shape of the guide portions 29 can be designed as appropriate.

第１の筒部材23は、筒本体25に拡径部30を設ける構成としたが、このような構成には限定されず、拡径部30を設けない構成にしてもよい。 The first cylindrical member 23 is configured to provide the enlarged diameter portion 30 in the cylindrical main body 25. However, the first cylindrical member 23 is not limited to such a configuration, and may be configured not to provide the enlarged diameter portion 30.

また、吸気弁本体21は、第１の筒部材23に凹溝部31および係合溝部32を設け、第２の筒部材24に係合突起部37を設ける構成としたが、このような構成には限定されず、第１の筒部材23に第２の筒部材24が取付可能な構成であればよい。 In addition, the intake valve main body 21 is configured such that the first cylindrical member 23 is provided with the concave groove portion 31 and the engaging groove portion 32, and the second cylindrical member 24 is provided with the engaging projection portion 37. Is not limited as long as the second cylinder member 24 can be attached to the first cylinder member 23.

さらに、吸気弁本体21は、第１の筒部材23に係合突起部33を設け、保護部材42にこの係合突起部33に係合可能な被係合溝部50を設ける構成としたが、このような構成には限定されない。例えば保護部材42を設ける構成の場合には、第１の筒部材23または第２の筒部材24に保護部材42が取付可能な構成であればよい。 Further, the intake valve main body 21 has a configuration in which the first cylindrical member 23 is provided with an engaging protrusion 33 and the protective member 42 is provided with an engaged groove 50 that can be engaged with the engaging protrusion 33. It is not limited to such a configuration. For example in the case of a configuration in which the protective member 42, the protection member 42 to the first tubular member 23 or second tubular member 24 is not good if the attachable structure.

また、弁体22は、シール部52をシール面56とシールパッキン57とシール座金58とで構成するものには限定されず、シール部52が弁座部26に着座して吸気孔27を閉塞可能な構成であればよい。 Further, the valve body 22 is not limited to the seal portion 52 constituted by the seal surface 56, the seal packing 57, and the seal washer 58, but the seal portion 52 is seated on the valve seat portion 26 and closes the intake hole 27. Any configuration is possible.

次に、第２実施形態について図４を参照して説明する。なお、上記本実施形態と同一の構成及び作用については、同一符号を付してその説明を省略する。 Next, a second embodiment will be described with reference to FIG. In addition, about the structure and effect | action same as the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

図４に示すように、吸気弁装置１は、例えば接着などにて分岐部15に固定する略円筒状の取付部材71を備える。 As shown in FIG. 4, the intake valve device 1 includes a substantially cylindrical mounting member 71 that is fixed to the branch portion 15 by, for example, bonding.

この取付部材71は、分岐部15に嵌合可能な筒本体72を有する。この筒本体72の一端である上端部には、径方向の外側に突出するフランジ部73を設ける。また、筒本体72の内周面の一部には、吸気弁本体21との係合部としての螺着溝74を設ける。また、筒本体72の内周面には、フランジ部73から筒本体72の他端の径方向内側へ向かって傾斜するテーパ面76を設ける。 The attachment member 71 has a cylinder body 72 that can be fitted to the branch portion 15. A flange portion 73 protruding outward in the radial direction is provided at the upper end portion which is one end of the cylinder main body 72. Further, a screwing groove 74 as an engaging portion with the intake valve main body 21 is provided on a part of the inner peripheral surface of the cylinder main body 72. Further, a tapered surface 76 that is inclined from the flange portion 73 toward the radially inner side of the other end of the tube main body 72 is provided on the inner peripheral surface of the tube main body 72.

また、吸気弁本体21の外周面の一部には、螺着溝74に係合して螺着可能な被係合部としての螺子山部75を有する。 Further, a part of the outer peripheral surface of the intake valve main body 21 has a screw thread portion 75 as an engaged portion that can be engaged with and screwed into the screwing groove 74.

そして、このように吸気弁装置１は分岐部15に固定する取付部材71を具備し、吸気弁本体21が取付部材71の螺着溝74に螺着可能な螺子山部75を有する。このため、予め分岐部15に取付部材71を取り付けることにより、吸気弁７を容易に着脱できる。 In this way, the intake valve device 1 includes the attachment member 71 that is fixed to the branch portion 15, and the intake valve main body 21 has a screw thread portion 75 that can be screwed into the screw groove 74 of the attachment member 71. For this reason, the intake valve 7 can be easily attached and detached by attaching the attachment member 71 to the branch portion 15 in advance.

また、取付部材71には、テーパ面76を設ける。このため、吸気弁本体21の固定パッキン38は、取り付けに伴ってテーパ面76に当接し、分岐部15と吸気弁本体21とを水密に固定できる。 The attachment member 71 is provided with a tapered surface 76. For this reason, the fixed packing 38 of the intake valve main body 21 comes into contact with the tapered surface 76 when attached, and the branch portion 15 and the intake valve main body 21 can be fixed in a watertight manner.

１吸気弁装置
３排水器具
５排水管
６分岐継手
７吸気弁
８吸気弁装置
９排水管
9c 管体としての分岐路
10 開口端部
12 流入部
14 流出部
15 分岐部
21 吸気弁本体
22 弁体
23 第１の筒部材
24 第２の筒部材
27 吸気孔
38 固定パッキン
39 パッキン係止部
42 保護部材
47 基部
49 ガイド突起部
52 シール部
53 フロート部
54 天面部
55 側面部
61 ガイド軸部
63 保持手段としてのばね部材
71 取付部材
74 係合部としての螺着溝
75 被係合部としての螺子山部 1 Intake valve device
3 Drainage device 5 Drainage pipe 6 Branch joint 7 Intake valve 8 Intake valve device 9 Drainage pipe
9c Bifurcation as a tubular body
10 Open end
12 Inlet
14 Outflow part
15 Branch
21 Intake valve body
22 Disc
23 First tube member
24 Second cylinder member
27 Air intake vent
38 Fixed packing
39 Packing lock
42 Protection member
47 bases
49 Guide protrusion
52 Seal part
53 Float section
54 Top surface
55 Side
61 Guide shaft
63 Spring member as holding means
71 Mounting member
74 Threaded groove as engaging part
75 Screw thread as engaged part

Claims

An inflow part into which drainage flows in, connected to a drain pipe through which drainage from the drainage device flows, an outflow part in which drainage inflow from the inflow part flows out to the drain pipe, and a branch that branches from between the inflow part and the outflow part A branch joint having a portion;
An intake valve that is attached to the branch portion and sucks outside air when the pressure in the drain pipe drops below the outside air pressure;
The intake valve
A substantially cylindrical intake valve body capable of containing within said branch portion has a suction hole communicating with the outside air space,
A valve body that is provided inside the intake valve body and switches between opening and closing of the intake hole according to a pressure difference between the pressure in the drain pipe and the external pressure;
Holding means for holding the valve body in a state of closing the intake hole ;
A base portion that covers the lower side of the supply valve main body so as to allow ventilation in the branch portion ;
The valve body has a seal portion that can close the intake hole, and a float portion that can float by drainage flowing backward from the drain pipe,
The float portion has a hollow shape having a top surface portion and a side surface portion extending in a cylindrical shape downward from the top surface portion, and a cylindrical guide shaft portion protruding from the center portion of the top surface portion toward the base side. Have
The base is provided with a guide projection that protrudes from the base toward the top surface of the float.
The holding means is sandwiched between the guide shaft portion and the guide projection portion,
When the pressure difference between the pressure in the drain pipe and the external pressure does not occur, the holding means holds the state where the valve body closes the intake hole,
The intake valve device, wherein when the pressure in the drain pipe falls below an external pressure and a pressure difference occurs, the valve body moves in the intake valve main body to open the intake hole.

A tubular body having an open end connected to a drain pipe through which drainage from the drainage device flows;
An intake valve that is attached to the opening end and sucks outside air when the pressure in the drain pipe drops below the outside air pressure;
The intake valve
A substantially cylindrical intake valve body capable of containing within said open end has a suction hole communicating with the outside air space,
A valve body that is provided inside the intake valve body and switches between opening and closing of the intake hole according to a pressure difference between the pressure in the drain pipe and the external pressure;
Holding means for holding the valve body in a state of closing the intake hole ;
A base portion that covers the lower side of the supply valve main body so as to allow ventilation in the open end portion ; and
The valve body has a seal portion that can close the intake hole, and a float portion that can float by drainage flowing backward from the drain pipe,
The float portion has a hollow shape having a top surface portion and a side surface portion extending in a cylindrical shape downward from the top surface portion, and a cylindrical guide shaft portion protruding from the center portion of the top surface portion toward the base side. Have
The base is provided with a guide projection that protrudes from the base toward the top surface of the float.
The holding means is sandwiched between the guide shaft portion and the guide projection portion,
When the pressure difference between the pressure in the drain pipe and the external pressure does not occur, the holding means holds the state where the valve body closes the intake hole,
The intake valve device, wherein when the pressure in the drain pipe falls below an external pressure and a pressure difference occurs, the valve body moves in the intake valve main body to open the intake hole.

The intake valve device according to claim 1 or 2 , wherein the intake valve body is provided with a protective member that prevents entry of foreign substances from the drain pipe.

The intake valve body includes a substantially cylindrical first cylindrical member and a substantially cylindrical second cylindrical member that can be engaged with and attached to the outer peripheral surface of the first cylindrical member;
The first cylindrical member has a packing locking portion located on the outer peripheral surface of the first cylindrical member,
The intake valve includes a fixed packing attached to the packing locking portion,
The fixed packing is deformed so as to protrude outward in the radial direction by the engagement of the first cylindrical member and the second cylindrical member in a state of mounting the fixed packing on the outer peripheral surface;
The intake valve device according to any one of claims 1 to 3 , wherein the branch portion or the open end portion and the intake valve main body are fixed in a watertight manner by the fixed packing.

Provided with an attachment member provided with an engagement portion on an inner peripheral surface and fixed to the branch portion or the opening end,
The intake valve device according to any one of claims 1 to 4 , wherein the intake valve main body includes an engaged portion that can be engaged with the engagement portion.

The holding means is a spring member,
One end and the other end of the spring member are sandwiched between the guide shaft portion and the guide projection portion.
The intake valve device according to any one of claims 1 to 5, wherein