JP6854078B2 - Water spouting device and hand washing device - Google Patents

Water spouting device and hand washing device Download PDF

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JP6854078B2
JP6854078B2 JP2015257238A JP2015257238A JP6854078B2 JP 6854078 B2 JP6854078 B2 JP 6854078B2 JP 2015257238 A JP2015257238 A JP 2015257238A JP 2015257238 A JP2015257238 A JP 2015257238A JP 6854078 B2 JP6854078 B2 JP 6854078B2
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water
chamber
water discharge
passage
outlet
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JP2017119989A (en
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和彦 張岳
和彦 張岳
豪介 榊▲原▼
豪介 榊▲原▼
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Lixil Corp
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Description

本発明は、便器装置に用いられる吐水装置及びこれを用いた手洗装置に関する。 The present invention relates to a water discharge device used for a toilet bowl device and a hand washing device using the water discharge device.

従来より、大便器の利用後に使用者が手洗いできるように、大便器と手洗器を組み合わせて用いる場合がある。この手洗器には、通常、便器洗浄タンクに給水するタンク給水路を給水源とする吐水装置が取り付けられ、吐水装置からは手洗器の鉢部に向けて吐水される。 Conventionally, a toilet bowl and a hand-washing device may be used in combination so that the user can wash the hands after using the toilet bowl. This hand washer is usually equipped with a water discharge device whose water supply source is a tank water supply channel for supplying water to the toilet bowl wash tank, and water is discharged from the water discharge device toward the pot portion of the hand wash device.

特許文献１には、この種の便器装置に用いられる吐水装置ではないが、水栓に用いられる吐水装置が開示されている。この吐水装置は、給水路から水が流入する通水路と、通水路から流出する水を一時的に溜めるための水室と、水室に溜められる水を吐水孔から吐水するための吐水部とを備えている。 Patent Document 1 discloses a water spouting device used for a faucet, although it is not a water spouting device used for this type of toilet bowl device. This water discharge device has a water passage for water flowing in from the water supply channel, a water chamber for temporarily storing the water flowing out from the water passage, and a water discharge unit for discharging the water stored in the water chamber from the water discharge hole. It has.

特開２０１３−２１１８号公報Japanese Unexamined Patent Publication No. 2013-2118

ところで、便器装置のタンク給水路には、通常、定流量弁が設置されており、下流側に給水される水の流量が制限されている。このため、タンク給水路から吐水装置に給水される水の流量は比較的に小流量になり易くなる。特許文献１に記載の吐水装置のような、水室に溜めた水を吐水孔から吐水する構造の場合、吐水装置に小流量の水が給水される条件のもとでは、吐水部から吐水される水流の流量分布に位置による偏りが長期に亘り生じ易くなるという知見を本発明者は得た。このような流量分布の偏りが生じてしまうと、過度に流量の少ない箇所からは、他の箇所と比べて弱水勢の水流が吐水されてしまい、全体としてきれいな吐水流を得られなくなってしまう。 By the way, a constant flow rate valve is usually installed in the tank water supply channel of the toilet bowl device, and the flow rate of water supplied to the downstream side is restricted. Therefore, the flow rate of the water supplied from the tank water supply channel to the water discharge device tends to be relatively small. In the case of a structure such as the water discharge device described in Patent Document 1 in which water stored in a water chamber is discharged from a water discharge hole, water is discharged from the water discharge portion under the condition that a small flow rate of water is supplied to the water discharge device. The present inventor has obtained the finding that the distribution of the flow rate of the water stream is likely to be biased depending on the position for a long period of time. If such a bias in the flow rate distribution occurs, a water flow with a weaker water force will be discharged from a place where the flow rate is excessively low as compared with other places, and it will not be possible to obtain a clean water discharge flow as a whole.

本発明は、このような課題に鑑みてなされ、その目的は、吐水部から吐水される水流の流量分布を均一化し易くできる吐水装置を提供することにある。 The present invention has been made in view of such a problem, and an object of the present invention is to provide a water discharge device capable of easily making the flow rate distribution of the water flow discharged from the water discharge portion uniform.

上記課題を解決するための本発明のある態様は吐水装置である。
第１態様の吐水装置は、便器洗浄タンクに給水するタンク給水路を給水源とし、手洗器に取り付けられる吐水装置であって、上流側水路から水が流入する通水路と、前記通水路から流出する水を一時的に溜めるための水室と、前記水室に溜められる水を吐水孔から吐水するための吐水部と、を有し、前記通水路は、前記通水路内を流れる水が衝突する衝突面を有することを特徴とする。 One aspect of the present invention for solving the above problems is a water discharge device.
The water discharge device of the first aspect is a water discharge device attached to a hand washer with a tank water supply channel for supplying water to the toilet bowl washing tank as a water supply source. It has a water chamber for temporarily storing the water to be collected and a water discharge unit for discharging the water stored in the water chamber from the water discharge hole, and the water passage is collided with water flowing in the water passage. It is characterized by having a collision surface.

第１態様の吐水装置によれば、通水路内を流れる水を衝突面に衝突させることにより、その水の流速を減少させてから水室に流出させることができる。よって、上流側水路から通水路に過度に流速の速い水が流入した場合でも、通水路から水室内に過度に流速の速い水が流出するのを防止できる。これにより、水室内での位置による流速分布の偏りを抑えられ、吐水部から吐水される水流の流速分布を均一化し易くできる。 According to the water discharge device of the first aspect, by colliding the water flowing in the water passage with the collision surface, the flow velocity of the water can be reduced and then the water can be discharged to the water chamber. Therefore, even when water having an excessively high flow velocity flows into the water passage from the upstream side water channel, it is possible to prevent the water having an excessively high flow velocity from flowing out from the water passage into the water chamber. As a result, the deviation of the flow velocity distribution depending on the position in the water chamber can be suppressed, and the flow velocity distribution of the water flow discharged from the water discharge portion can be easily made uniform.

本態様によれば、吐水部から吐水される水流の流速分布を均一化し易くできる。 According to this aspect, it is possible to easily make the flow velocity distribution of the water flow discharged from the water discharge portion uniform.

実施形態の手洗装置が用いられる便器装置を示す斜視図である。It is a perspective view which shows the toilet bowl device which uses the hand washing device of embodiment. 実施形態の便器装置の給水系の一部を模式的に示す構成図である。It is a block diagram which shows a part of the water supply system of the toilet bowl device of embodiment schematically. 実施形態の手洗装置の側面断面図である。It is a side sectional view of the hand washing apparatus of embodiment. 実施形態の手洗装置の一部を拡大した側面断面図である。It is an enlarged side sectional view of a part of the hand washing apparatus of embodiment. 図４のＡ−Ａ線に沿った切断面の一部とともに他の部位の外観を示す部分断面図である。It is a partial cross-sectional view which shows the appearance of the other part together with a part of the cut surface along the line AA of FIG. 図４の吐水装置を下側から見た斜視図である。It is a perspective view which looked at the water discharge device of FIG. 4 from the lower side. 図４のＢ−Ｂ線断面図である。FIG. 4 is a cross-sectional view taken along the line BB of FIG. 図４の吐水装置の拡大図である。It is an enlarged view of the water discharge device of FIG. 図９（ａ）は、図８のＣ−Ｃ線断面図、図９（ｂ）は、図８のＤ−Ｄ線断面図、図９（ｃ）は、図８のＥ−Ｅ線断面図である。9 (a) is a sectional view taken along line CC of FIG. 8, FIG. 9 (b) is a sectional view taken along line DD of FIG. 8, and FIG. 9 (c) is a sectional view taken along line EE of FIG. Is. 図１０（ａ）は、第１参考例のハウジングを模式的に示す側面断面図であり、図１０（ｂ）は、その上面断面図である。FIG. 10 (a) is a side sectional view schematically showing the housing of the first reference example, and FIG. 10 (b) is a top sectional view thereof.

以下、実施形態、変形例では、同一の構成要素に同一の符号を付し、重複する説明を省略する。また、各図面では、説明の便宜のため、構成要素の一部を適宜省略したり、構成要素の寸法を適宜拡大、縮小して示す。 Hereinafter, in the embodiments and modifications, the same components will be designated by the same reference numerals, and duplicate description will be omitted. Further, in each drawing, for convenience of explanation, some of the constituent elements are appropriately omitted, and the dimensions of the constituent elements are appropriately enlarged or reduced.

図１は、実施形態の手洗装置１０が用いられる便器装置１２を示す斜視図である。
便器装置１２は、主に、便器１４と、ケーシング１６と、便器洗浄タンク１８（以下、単にタンク１８ともいう）と、手洗装置１０とを備える。ケーシング１６は、タンク１８等を収めるための外装体である。ケーシング１６は、タンク１８とともに便器１４に搭載され、その上端部には上端開口部１６ａが形成される。タンク１８は、便器１４の便鉢（不図示）内に供給される洗浄水を貯溜するためのものである。手洗装置１０は、ケーシング１６の上端開口部１６ａに蓋として取り付けられる。 FIG. 1 is a perspective view showing a toilet bowl device 12 in which the hand washing device 10 of the embodiment is used.
The toilet bowl device 12 mainly includes a toilet bowl 14, a casing 16, a toilet bowl washing tank 18 (hereinafter, also simply referred to as a tank 18), and a hand washing device 10. The casing 16 is an exterior body for accommodating the tank 18 and the like. The casing 16 is mounted on the toilet bowl 14 together with the tank 18, and an upper end opening 16a is formed at the upper end thereof. The tank 18 is for storing the washing water supplied in the toilet bowl (not shown) of the toilet bowl 14. The hand washing device 10 is attached to the upper end opening 16a of the casing 16 as a lid.

図２は、便器装置１２の給水系の一部を模式的に示す構成図である。
便器装置１２は、タンク給水路２０と、分岐給水路２２とを備える。タンク給水路２０は、タンク１８に給水するための水路である。タンク給水路２０には第１定流量弁２３やボールタップ２４が設置される。第１定流量弁２３は、水源から供給される水を所定の第１流量以下の流量に制限する。第１定流量弁２３は、第１定流量弁２３より水源側の水路部分の圧力変動の影響を抑え、タンク１８内に安定した流量の水を給水するためのものである。ボールタップ２４は、タンク１８内の水位に連動してタンク給水路２０を開閉する。これにより、タンク給水路２０は、タンク１８に対して給水する給水状態と、タンク１８に対する給水を停止する給水停止状態との間で切り替わる。タンク１８内の洗浄水が所定水位を下回るとボールタップ２４が開弁し、タンク給水路２０の下流端部２０ａからタンク１８内に給水される。タンク１８内の洗浄水が所定水位以上になるとボールタップ２４が閉弁し、タンク給水路２０からタンク１８内への給水が停止する。 FIG. 2 is a configuration diagram schematically showing a part of the water supply system of the toilet bowl device 12.
The toilet device 12 includes a tank water supply channel 20 and a branch water supply channel 22. The tank water supply channel 20 is a water channel for supplying water to the tank 18. A first constant flow valve 23 and a ball tap 24 are installed in the tank water supply channel 20. The first constant flow rate valve 23 limits the water supplied from the water source to a flow rate equal to or lower than a predetermined first flow rate. The first constant flow rate valve 23 is for suppressing the influence of pressure fluctuations in the water channel portion on the water source side of the first constant flow rate valve 23 and supplying water with a stable flow rate into the tank 18. The ball tap 24 opens and closes the tank water supply channel 20 in conjunction with the water level in the tank 18. As a result, the tank water supply channel 20 switches between a water supply state in which water is supplied to the tank 18 and a water supply stop state in which the water supply to the tank 18 is stopped. When the washing water in the tank 18 falls below a predetermined water level, the ball tap 24 opens, and water is supplied into the tank 18 from the downstream end 20a of the tank water supply channel 20. When the washing water in the tank 18 reaches a predetermined water level or higher, the ball tap 24 closes and the water supply from the tank water supply channel 20 into the tank 18 is stopped.

分岐給水路２２は、手洗装置１０の吐水装置３０に給水するための水路であり、タンク給水路２０から分岐して設けられる。吐水装置３０はタンク給水路２０を給水源としていることになる。分岐給水路２２は、タンク給水路２０のボールタップ２４より下流側の水路部分から分岐している。分岐給水路２２は、タンク給水路２０と同様、タンク１８の水位に連動して、吐水装置３０に対して給水する給水状態と、吐水装置３０に対する給水を停止する給水停止状態との間で切り替わる。分岐給水路２２には第２定流量弁２５が設置される。第２定流量弁２５は、タンク給水路２０の下流端部２０ａからの吐水動作に伴う第１定流量弁２３と第２定流量弁２５との間の水路部分の圧力変動の影響を抑え、吐水装置３０に安定した流量の水を給水するためのものである。 The branch water supply channel 22 is a water channel for supplying water to the water discharge device 30 of the hand washing device 10, and is provided as a branch from the tank water supply channel 20. The water discharge device 30 uses the tank water supply channel 20 as a water supply source. The branch water supply channel 22 branches from the water channel portion on the downstream side of the ball tap 24 of the tank water supply channel 20. Similar to the tank water supply channel 20, the branch water supply channel 22 switches between a water supply state in which water is supplied to the water discharge device 30 and a water supply stop state in which water supply to the water discharge device 30 is stopped in conjunction with the water level of the tank 18. .. A second constant flow valve 25 is installed in the branch water supply channel 22. The second constant flow rate valve 25 suppresses the influence of the pressure fluctuation of the water channel portion between the first constant flow rate valve 23 and the second constant flow rate valve 25 due to the water discharge operation from the downstream end portion 20a of the tank water supply channel 20. This is for supplying a stable flow rate of water to the water discharge device 30.

図３は、手洗装置１０の側面断面図である。
手洗装置１０は、手洗器２６と、給水管２８と、吐水装置３０と、を備える。手洗器２６は、手洗器２６の取付相手となるベースとしてのケーシング１６に取り付けられる。詳しくは、手洗器２６は、ケーシング１６の上端開口部１６ａに取り付けられる。 FIG. 3 is a side sectional view of the hand washing device 10.
The hand washing device 10 includes a hand washing device 26, a water supply pipe 28, and a water discharge device 30. The hand wash device 26 is attached to a casing 16 as a base to which the hand wash device 26 is attached. Specifically, the hand washer 26 is attached to the upper end opening 16a of the casing 16.

手洗器２６は、合成樹脂、セラミックス等を素材として一体成形される。手洗器２６は、鉢部２６ａと、外周壁部２６ｂとを有する。外周壁部２６ｂは、鉢部２６ａの上端縁部から下方に延びて形成され、鉢部２６ａを外周側から囲むように設けられる。 The hand wash device 26 is integrally molded using synthetic resin, ceramics, or the like as a material. The hand wash device 26 has a pot portion 26a and an outer peripheral wall portion 26b. The outer peripheral wall portion 26b is formed so as to extend downward from the upper end edge portion of the pot portion 26a, and is provided so as to surround the pot portion 26a from the outer peripheral side.

鉢部２６ａの底面部には排水孔２６ｃが形成され、鉢部２６ａで受けた水は排水孔２６ｃ等を通してタンク１８内に排水される。鉢部２６ａの内周壁部の周方向の一部をなす後壁部２６ｄは、他部をなす前壁部２６ｅより上側に延びるように形成される。鉢部２６ａの後壁部２６ｄの上部には吐水装置３０が取り付けられる装置取付部２６ｆが設けられる。 A drain hole 26c is formed on the bottom surface of the pot portion 26a, and the water received by the pot portion 26a is drained into the tank 18 through the drain hole 26c and the like. The rear wall portion 26d forming a part of the inner peripheral wall portion of the pot portion 26a in the circumferential direction is formed so as to extend upward from the front wall portion 26e forming the other portion. A device mounting portion 26f to which the water discharge device 30 is mounted is provided above the rear wall portion 26d of the pot portion 26a.

図４は、手洗装置１０の一部を拡大した側面断面図である。図５は、図４のＡ−Ａ線に沿った切断面の一部とともに他の部位の外観を示す部分断面図である。
給水管２８は、合成樹脂等の硬質な素材を用いて一体成形される。給水管２８の上流端部には中継管２９（図３参照）が接続され、中継管２９を介してタンク給水路２０と連通される。給水管２８と中継管２９の内部には、前述の分岐給水路２２が形成される。給水管２８は、手洗器２６の後壁部２６ｄの裏面側（外周側）に配置される。給水管２８の先端側には雄側接続筒部２８ａが設けられる。手洗器２６の装置取付部２６ｆには挿通孔２６ｇが形成され、給水管２８の雄側接続筒部２８ａは挿通孔２６ｇに挿通される。給水管２８は、手洗器２６にビス等の取付具３２により取り付けられる。 FIG. 4 is an enlarged side sectional view of a part of the hand washing device 10. FIG. 5 is a partial cross-sectional view showing the appearance of a part of the cut surface along the line AA of FIG. 4 and other parts.
The water supply pipe 28 is integrally molded using a hard material such as synthetic resin. A relay pipe 29 (see FIG. 3) is connected to the upstream end of the water supply pipe 28 and communicates with the tank water supply channel 20 via the relay pipe 29. The above-mentioned branch water supply channel 22 is formed inside the water supply pipe 28 and the relay pipe 29. The water supply pipe 28 is arranged on the back surface side (outer peripheral side) of the rear wall portion 26d of the hand wash device 26. A male side connecting cylinder portion 28a is provided on the tip end side of the water supply pipe 28. An insertion hole 26g is formed in the device mounting portion 26f of the hand wash device 26, and the male side connection cylinder portion 28a of the water supply pipe 28 is inserted into the insertion hole 26g. The water supply pipe 28 is attached to the hand washer 26 by an attachment 32 such as a screw.

吐水装置３０は、ハウジング３４と、外装カバー３６と、を備える。ハウジング３４は、クリップ等の留め具３８により給水管２８に接続され、給水管２８を介して手洗器２６に取り付けられる。ハウジング３４は、給水管２８から給水される水をハウジング３４の吐水部４８から吐水するためのものである。外装カバー３６は、ハウジング３４の大部分を覆い隠すためのものであり、ハウジング３４にビス等の固定具４０により固定される。 The water discharge device 30 includes a housing 34 and an exterior cover 36. The housing 34 is connected to the water supply pipe 28 by a fastener 38 such as a clip, and is attached to the hand washer 26 via the water supply pipe 28. The housing 34 is for discharging the water supplied from the water supply pipe 28 from the water discharge portion 48 of the housing 34. The outer cover 36 is for covering most of the housing 34, and is fixed to the housing 34 by a fixture 40 such as a screw.

ハウジング３４は、給水管２８の雄側接続筒部２８ａが差し込まれる有底筒状の雌側接続筒部３４ａを有する。ハウジング３４の雌側接続筒部３４ａと給水管２８の雄側接続筒部２８ａとの間は、給水管２８の雄側接続筒部２８ａの外周面に装着されるシール部材４２によりシールされる。 The housing 34 has a bottomed tubular female side connecting cylinder 34a into which the male side connecting cylinder 28a of the water supply pipe 28 is inserted. The female side connecting cylinder portion 34a of the housing 34 and the male side connecting cylinder portion 28a of the water supply pipe 28 are sealed by a sealing member 42 mounted on the outer peripheral surface of the male side connecting cylinder portion 28a of the water supply pipe 28.

図６は、図４の吐水装置３０を下側から見た斜視図である。
図４、図６に示すように、ハウジング３４は、さらに、通水路４４と、水室４６と、吐水部４８と、を有する。通水路４４は、上流側水路となる給水管２８の分岐給水路２２から給水される水を流すための水路である。通水路４４は、分岐給水路２２の水流出口２２ａから流出した水が流入する流入室４４ａと、流入室４４ａと水室４６とを連通する連通水路４４ｂと、を有する。連通水路４４ｂは水室４６に開口する流出口４４ｃを有し、水室４６には通水路４４の流出口４４ｃから横向きに水が流出する。これらの詳細は後述する。 FIG. 6 is a perspective view of the water discharge device 30 of FIG. 4 as viewed from below.
As shown in FIGS. 4 and 6, the housing 34 further includes a water passage 44, a water chamber 46, and a water discharge portion 48. The water passage 44 is a water channel for flowing water supplied from the branch water supply channel 22 of the water supply pipe 28 which is the upstream water channel. The water passage 44 has an inflow chamber 44a into which the water flowing out from the water outlet 22a of the branch water supply passage 22 flows in, and a communication water passage 44b communicating the inflow chamber 44a and the water chamber 46. The communicating water channel 44b has an outlet 44c that opens into the water chamber 46, and water flows out to the water chamber 46 laterally from the outlet 44c of the water channel 44. These details will be described later.

水室４６は、通水路４４の連通水路４４ｂから流出する水を一時的に溜めるためのものである。水室４６内を水で満たした状態にすることにより、水室４６内の水に水圧をかけた状態で吐水部４８の吐水孔５０から吐水し易くなる。これにより、給水管２８から低流量の水が通水路４４に給水される場合でも、水室４６内が水で満たされた状態になれば、水室４６内での位置によって流速差の少ない水流を吐水部４８から吐水し易くなる。 The water chamber 46 is for temporarily storing the water flowing out from the communication channel 44b of the channel 44. By filling the water chamber 46 with water, it becomes easy to discharge water from the water discharge hole 50 of the water discharge unit 48 in a state where water pressure is applied to the water in the water chamber 46. As a result, even when a low flow rate of water is supplied from the water supply pipe 28 to the water passage 44, if the inside of the water chamber 46 is filled with water, a water flow having a small flow velocity difference depending on the position in the water chamber 46. Can be easily discharged from the water discharge unit 48.

図７は、図４のＢ−Ｂ線断面図である。
図４、図７に示すように、水室４６は、通水路４４の水が流出する流出口４４ｃより左右に幅広かつ扁平な形状である。水室４６は、上下に対向する上内面４６ａと下内面４６ｂとを有する。水室４６の上内面４６ａの一部と下内面４６ｂとは、通水路４４の流出口４４ｃの中心軸線ＣＬ１に沿って延びるように平行に配置される。水室４６の下内面４６ｂや、通水路４４の流出口４４ｃの中心軸線ＣＬ１は、水平面に対して傾斜している。詳しくは、これらは、通水路４４の流出口４４ｃからの水の流出方向Ｐａに向かって上り勾配で傾斜している。この条件を満たすように、ハウジング３４は手洗器２６に取り付けられるともいえる。ここでの流出方向Ｐａとは、流出口４４ｃの中心軸線ＣＬ１に沿った方向のうち、通水路４４から水室４６に向かう方向をいう。 FIG. 7 is a cross-sectional view taken along the line BB of FIG.
As shown in FIGS. 4 and 7, the water chamber 46 has a wide and flat shape to the left and right of the outlet 44c through which the water in the water passage 44 flows out. The water chamber 46 has an upper inner surface 46a and a lower inner surface 46b facing each other in the vertical direction. A part of the upper inner surface 46a and the lower inner surface 46b of the water chamber 46 are arranged in parallel so as to extend along the central axis CL1 of the outlet 44c of the water passage 44. The lower inner surface 46b of the water chamber 46 and the central axis CL1 of the outlet 44c of the water passage 44 are inclined with respect to the horizontal plane. Specifically, they are inclined uphill toward the outflow direction Pa of water from the outflow port 44c of the water passage 44. It can be said that the housing 34 is attached to the hand washer 26 so as to satisfy this condition. The outflow direction Pa here refers to the direction from the water passage 44 toward the water chamber 46 in the direction along the central axis CL1 of the outflow port 44c.

水室４６は、通水路４４の流出口４４ｃに近い側に設けられる後側部分４６ｃと、その流出口４４ｃから遠い側に設けられる前側部分４６ｄと、を有する。後側部分４６ｃの左右両側の内面には、通水路４４の流出口４４ｃに向かうにつれて内幅寸法（左右寸法）が幅狭となるように導水面４６ｅが形成されている。前側部分４６ｄは後側部分４６ｃより左右に幅広となるように形成される。前側部分４６ｄの下側壁部の一部は吐水部４８を構成する。 The water chamber 46 has a rear side portion 46c provided on the side close to the outlet 44c of the water passage 44, and a front side portion 46d provided on the side far from the outlet 44c. Water guide surfaces 46e are formed on the inner surfaces on both the left and right sides of the rear side portion 46c so that the inner width dimension (left and right dimension) becomes narrower toward the outlet 44c of the water passage 44. The front side portion 46d is formed so as to be wider to the left and right than the rear side portion 46c. A part of the lower side wall portion of the front side portion 46d constitutes a water discharge portion 48.

図４、図６に示すように、吐水部４８は、水室４６に溜められる水を吐水孔５０から吐水するためのものである。吐水部４８は、ハウジング３４の外内を隔てる壁部の一部を構成する。吐水部４８は、手洗器２６の鉢部２６ａの底側に臨むように配置され、吐水孔５０から下向きに吐水する。吐水部４８は、ハウジング３４の周囲に連なる他の壁部３４ｂより外側に突き出るように形成される。これにより、吐水部４８に形成される吐水孔５０の水導入口５０ａから水導出口５０ｂまでの水路長を長くでき、吐水孔５０内を流れる水を整流し易くなる。 As shown in FIGS. 4 and 6, the water discharge unit 48 is for discharging the water stored in the water chamber 46 from the water discharge hole 50. The water discharge portion 48 constitutes a part of a wall portion that separates the outside and the inside of the housing 34. The water spouting portion 48 is arranged so as to face the bottom side of the pot portion 26a of the hand washing device 26, and spouts water downward from the water spouting hole 50. The water discharge portion 48 is formed so as to protrude outward from another wall portion 34b connected to the periphery of the housing 34. As a result, the length of the water channel from the water inlet 50a to the water outlet 50b of the water discharge hole 50 formed in the water discharge portion 48 can be lengthened, and the water flowing in the water discharge hole 50 can be easily rectified.

吐水部４８は、後述する吐水孔５０の配列態様に応じたＵ字状の外周形状をもつ。外装カバー３６は吐水部４８の外周形状に対応する内周形状の嵌込部３６ａを有し、ハウジング３４の吐水部４８は外装カバー３６の嵌込部３６ａに嵌め込まれる。 The water discharge portion 48 has a U-shaped outer peripheral shape according to the arrangement mode of the water discharge holes 50 described later. The outer cover 36 has an inner peripheral shape fitting portion 36a corresponding to the outer peripheral shape of the water discharge portion 48, and the water discharge portion 48 of the housing 34 is fitted into the fitting portion 36a of the exterior cover 36.

吐水部４８には複数の吐水孔５０が形成される。各吐水孔５０のそれぞれからは鉢部２６ａの底側に向けてシャワー状の水流が吐水される。複数の吐水孔５０は、吐水部４８の外面に描かれるＵ字状の仮想線を配列線としたとき、二本の配列線上に位置するように配列される。複数の吐水孔５０の配列態様は吐水部４８から幅広な範囲に水流が吐水されるように設定される。 A plurality of water discharge holes 50 are formed in the water discharge portion 48. A shower-like water stream is discharged from each of the water discharge holes 50 toward the bottom side of the pot portion 26a. The plurality of water discharge holes 50 are arranged so as to be located on the two arrangement lines when the U-shaped virtual line drawn on the outer surface of the water discharge portion 48 is used as the arrangement line. The arrangement mode of the plurality of water discharge holes 50 is set so that the water flow is discharged from the water discharge portion 48 in a wide range.

図８は、図４の吐水装置３０の拡大図である。図９（ａ）は、図８のＣ−Ｃ線断面図、図９（ｂ）は、図８のＤ−Ｄ線断面図、図９（ｃ）は、図８のＥ−Ｅ線断面図である。
図８、図９に示すように、通水路４４の流入室４４ａは、ハウジング３４の雌側接続筒部３４ａの底部と給水管２８の雄側接続筒部２８ａとに囲まれて形成される。流入室４４ａは、一つの中心軸線ＣＬ２に沿って延びる円形の内周面４４ａａと、分岐給水路２２の水流出口２２ａと対向する奥底面４４ａｂと、を有する。流入室４４ａの中心軸線ＣＬ２は水流出口２２ａの中心軸線ＣＬ３と同軸に設けられる。流入室４４ａの奥底面４４ａｂには連通水路４４ｂ内に通水するための通水口４４ｄが開口する。流入室４４ａは、分岐給水路２２の水流出口２２ａより水流出口２２ａの中心軸線ＣＬ３に直交する断面での断面積が大きくなるように形成される。 FIG. 8 is an enlarged view of the water discharge device 30 of FIG. 9 (a) is a sectional view taken along line CC of FIG. 8, FIG. 9 (b) is a sectional view taken along line DD of FIG. 8, and FIG. 9 (c) is a sectional view taken along line EE of FIG. Is.
As shown in FIGS. 8 and 9, the inflow chamber 44a of the water passage 44 is formed so as to be surrounded by the bottom portion of the female side connecting cylinder portion 34a of the housing 34 and the male side connecting cylinder portion 28a of the water supply pipe 28. The inflow chamber 44a has a circular inner peripheral surface 44aa extending along one central axis CL2 and a back bottom surface 44ab facing the water outlet 22a of the branch water supply channel 22. The central axis CL2 of the inflow chamber 44a is provided coaxially with the central axis CL3 of the water outlet 22a. A water passage port 44d for passing water into the communication water passage 44b opens in the back bottom surface 44ab of the inflow chamber 44a. The inflow chamber 44a is formed so that the cross-sectional area in the cross section orthogonal to the central axis CL3 of the water outlet 22a is larger than that of the water outlet 22a of the branch water supply channel 22.

通水路４４の連通水路４４ｂは直線状に延びている。連通水路４４ｂの断面は円周上の二点を通る弧と弦とを連ねた形状をなし、流入室４４ａの中心軸線ＣＬ２に直交する断面より水路断面積が小さくなるように形成される。連通水路４４ｂの一部の面となる弧状の内下面４４ｂａは流入室４４ａの一部の面となる下内面４４ａｃと滑らかに連なるように形成される。 The communication channel 44b of the channel 44 extends in a straight line. The cross section of the communicating water channel 44b has a shape in which an arc passing through two points on the circumference and a chord are connected, and is formed so that the cross section of the water channel is smaller than the cross section orthogonal to the central axis CL2 of the inflow chamber 44a. The arc-shaped inner lower surface 44ba, which is a part of the surface of the communication channel 44b, is formed so as to be smoothly connected to the lower inner surface 44ac, which is a part of the inflow chamber 44a.

ここで、通水路４４の流入室４４ａの奥底面４４ａｂは、給水管２８の水流出口２２ａに対して、水流出口２２ａからの水の流出方向Ｐｂに設けられる衝突面５２を有する。衝突面５２は流入室４４ａの対向する一方の面となる上内面４４ａｄから、対向する他方の面となる下内面４４ａｃに向けて延びる段差面として形成される。 Here, the inner bottom surface 44ab of the inflow chamber 44a of the water passage 44 has a collision surface 52 provided in the outflow direction Pb of water from the water outlet 22a with respect to the water outlet 22a of the water supply pipe 28. The collision surface 52 is formed as a stepped surface extending from the upper inner surface 44ad, which is one of the facing surfaces of the inflow chamber 44a, toward the lower inner surface 44ac, which is the other facing surface.

図８に示すように、水流出口２２ａから流出した水（矢印Ｐｃ１参照）は通水路４４の衝突面５２に衝突し、その後に水流出口２２ａの中心軸線ＣＬ３に対して通水口４４ｄがある側（図中下側）に流れ方向を変更する（矢印Ｐｃ２参照）。流入室４４ａ内で通水口４４ｄがある側に流れる水は、流入室４４ａの内周面４４ａａと衝突し、その後に通水口４４ｄに近づく方向に流れ方向を変更し（矢印Ｐｃ３参照）、通水口４４ｄを通り抜ける。通水路４４の通水口４４ｄを通り抜けた水は流出口４４ｃに向けて直進するように流れる。 As shown in FIG. 8, the water flowing out from the water outlet 22a (see arrow Pc1) collides with the collision surface 52 of the water passage 44, and then the side where the water outlet 44d is located with respect to the central axis CL3 of the water outlet 22a (see arrow Pc1). Change the flow direction to the lower side in the figure (see arrow Pc2). The water flowing in the inflow chamber 44a to the side where the water passage port 44d is located collides with the inner peripheral surface 44aa of the inflow chamber 44a, and then changes the flow direction in the direction approaching the water passage port 44d (see arrow Pc3). Go through 44d. The water that has passed through the water passage port 44d of the water passage 44 flows straight toward the outlet 44c.

このように、通水路４４は、上流側水路２２の水流出口２２ａから流入する水を衝突面５２と衝突させた後、その衝突により流れ方向を変更した水を連通水路４４ｂに導くように構成される。また、通水路４４は、上流側水路２２の水流出口２２ａから流入する水を衝突面５２と衝突させた後、流れ方向を変えた水を流入室４４ａの他の内面（内周面４４ａａ）と更に衝突させてから、連通水路４４ｂに導くように構成されてもいる。 In this way, the water passage 44 is configured to collide the water flowing in from the water outlet 22a of the upstream water channel 22 with the collision surface 52, and then guide the water whose flow direction is changed by the collision to the communication water channel 44b. To. Further, in the water passage 44, after the water flowing in from the water outlet 22a of the upstream water channel 22 collides with the collision surface 52, the water whose flow direction is changed is brought into the other inner surface (inner peripheral surface 44aa) of the inflow chamber 44a. It is also configured to lead to the communication channel 44b after further collision.

通水路４４に流入する水を衝突面５２と衝突させることにより、その水の流速を減少させることができる。また、通水路４４の流入室４４ａは、分岐給水路２２の水流出口２２ａより断面積が大きくなるように形成されるため、衝突面５２と衝突した水を流入室４４ａ内の広い範囲に大きく拡散させることで、更に流速を減少させることができる。水室４６には、衝突面５２との衝突により、分岐給水路２２の水流出口２２ａから流出した時点より流速の減少した水が通水路４４の流出口４４ｃから流出される。つまり、通水路４４は、衝突面５２に水を衝突させることにより、水の流速を減少させた状態で水室４６に流出させるように構成されているといえる。 By colliding the water flowing into the water passage 44 with the collision surface 52, the flow velocity of the water can be reduced. Further, since the inflow chamber 44a of the water passage 44 is formed so as to have a larger cross-sectional area than the water outlet 22a of the branch water supply passage 22, the water colliding with the collision surface 52 is widely diffused in a wide range in the inflow chamber 44a. By doing so, the flow velocity can be further reduced. Due to the collision with the collision surface 52, water having a flow velocity reduced from the time when it flows out from the water outlet 22a of the branch water supply channel 22 flows out to the water chamber 46 from the outlet 44c of the water passage 44. That is, it can be said that the water passage 44 is configured to cause water to collide with the collision surface 52 so that the water flows out to the water chamber 46 in a state where the flow velocity of the water is reduced.

このように構成するうえで、通水路４４の衝突面５２に衝突してから通水路４４の流出口４４ｃから流出するまでの間に水が流れる水路の長さが長すぎると、その内部を水が流れる過程で流速減少効果が低減してしまう恐れがある。このため、この長さは、分岐給水路２２の水流出口２２ａから流出した時点の流速より、通水路４４の流出口４４ｃから流出する時点での流速が小さくなるような所定長さに設定される。この長さは実験、解析等により求めればよい。 In such a configuration, if the length of the water channel through which water flows from the collision with the collision surface 52 of the water channel 44 to the outflow from the outlet 44c of the water channel 44 is too long, water is formed inside the channel 44. There is a risk that the effect of reducing the flow velocity will be reduced in the process of flowing. Therefore, this length is set to a predetermined length so that the flow velocity at the time of outflow from the outflow port 44c of the water passage 44 is smaller than the flow velocity at the time of outflow from the water outflow port 22a of the branch water supply channel 22. .. This length may be obtained by experiment, analysis, or the like.

吐水装置３０の作用効果を説明する。
図１０（ａ）は、第１参考例のハウジング１３４を模式的に示す側面断面図であり、図１０（ｂ）は、その上面断面図である。
第１参考例のハウジング１３４は通水路４４に衝突面５２がなく、給水管２８から通水路４４に流入した水が直進して水室４６に流出する点で異なる。本発明者は参考例のハウジング１３４を用いて実験的検討をしたところ、次のような知見を得た。 The action and effect of the water discharge device 30 will be described.
FIG. 10A is a side sectional view schematically showing the housing 134 of the first reference example, and FIG. 10B is a top sectional view thereof.
The housing 134 of the first reference example is different in that the water passage 44 does not have a collision surface 52, and the water flowing from the water supply pipe 28 into the water passage 44 goes straight and flows out to the water chamber 46. The present inventor conducted an experimental study using the housing 134 of the reference example, and obtained the following findings.

給水管２８から通水路４４に過度に流速が速い水が流入する場合を考える。この場合、第１参考例のハウジング１３４では、流速の速い水が流速を落とすことなく水室４６に流出してしまう。このため、通水路４４の流出口４４ｃの中心軸線ＣＬ１に近い範囲Ｓａにある吐水孔５０の近傍には流速の速い水が流れる。この通水路４４の流出口４４ｃから流出した水は流出方向Ｐａの突き当たりにある面４６ｆに衝突し、その後に周囲に拡散して中心軸線ＣＬ１から遠ざかるように流れる。このため、その中心軸線ＣＬ１から遠い範囲Ｓｂにある吐水孔５０の近傍には流速の遅い水が流れることになる。この結果、通水路４４から過度に流速の速い水が水室４６内に流出してしまうと、水室４６内での位置によって流速分布に偏りが生じ易くなる。この傾向は、水室４６内に水が溜まりきっておらず、通水路４４から水室４６内に水が流出しはじめた増水段階にあるときに生じ易い。また、この傾向は、吐水装置に給水される水の流量が少ない場合、水室４６内に水が溜まりきっていない増水段階が長く続くため、長期に亘り特に生じ易い。 Consider a case where water having an excessively high flow velocity flows from the water supply pipe 28 into the water passage 44. In this case, in the housing 134 of the first reference example, the water having a high flow velocity flows out to the water chamber 46 without reducing the flow velocity. Therefore, water having a high flow velocity flows in the vicinity of the water discharge hole 50 in the range Sa near the central axis CL1 of the outlet 44c of the water passage 44. The water flowing out from the outflow port 44c of the water passage 44 collides with the surface 46f at the end of the outflow direction Pa, and then diffuses to the surroundings and flows away from the central axis CL1. Therefore, water having a slow flow velocity flows in the vicinity of the water discharge hole 50 in the range Sb far from the central axis CL1. As a result, if water having an excessively high flow velocity flows out from the water passage 44 into the water chamber 46, the flow velocity distribution tends to be biased depending on the position in the water chamber 46. This tendency tends to occur when the water is not completely accumulated in the water chamber 46 and the water is in the flooding stage when the water starts to flow out from the water passage 44 into the water chamber 46. Further, this tendency is particularly likely to occur over a long period of time because the water increase stage in which the water is not completely accumulated in the water chamber 46 continues for a long time when the flow rate of the water supplied to the water discharge device is small.

このような水室４６内での流速分布に大きな偏りが生じると、吐水部４８から吐水される水流の流量分布も位置による偏りが生じ易くなる。ここでの流量分布の位置による偏りとは、図１０の例でいえば、範囲Ｓａにある吐水孔５０からは強水勢の水流が吐水され、範囲Ｓｂにある吐水孔５０からは弱水勢の水流が吐水される状態をいう。この結果、全体としてきれいな吐水流を得られなくなってしまう。 If the flow velocity distribution in the water chamber 46 is greatly biased, the flow rate distribution of the water flow discharged from the water discharge portion 48 is likely to be biased depending on the position. The bias due to the position of the flow rate distribution here means that, in the example of FIG. 10, a strong water flow is discharged from the water discharge hole 50 in the range Sa, and a weak water flow is discharged from the water discharge hole 50 in the range Sb. Refers to the state in which water is discharged. As a result, it becomes impossible to obtain a clean water discharge flow as a whole.

この点、本実施形態の吐水装置３０によれば、通水路４４内を流れる水を衝突面５２に衝突させることにより、その水の流速を減少させてから水室４６に流出させることができる。よって、給水管２８から通水路４４に過度に流速の速い水が流入した場合でも、通水路４４から水室４６内に過度に流速の速い水が流出するのを防止できる。これにより、水室４６内での位置による流速分布の偏りを抑えられ、吐水部４８から吐水される水流の流量分布を均一化し易くでき、全体としてきれいな吐水流を得やすくなる。この効果は、水室４６内に水が溜まりきっていない増水段階において、特に効果的に得られる。また、この効果は、吐水装置３０に給水される水の流量が少なく、増水段階が長く続くような場合でも、吐水部４８から吐水される水流の流速分布を長期に亘り均一化できる点で、特に有効な効果として得られる。 In this respect, according to the water discharge device 30 of the present embodiment, by colliding the water flowing in the water passage 44 with the collision surface 52, the flow velocity of the water can be reduced and then the water can flow out to the water chamber 46. Therefore, even when water having an excessively high flow velocity flows from the water supply pipe 28 into the water passage 44, it is possible to prevent the water having an excessively high flow velocity from flowing out from the water passage 44 into the water chamber 46. As a result, the bias of the flow velocity distribution depending on the position in the water chamber 46 can be suppressed, the flow rate distribution of the water flow discharged from the water discharge portion 48 can be easily made uniform, and a clean water discharge flow can be easily obtained as a whole. This effect is particularly effective in the flooding stage where the water is not completely accumulated in the water chamber 46. Further, this effect is that even when the flow rate of the water supplied to the water discharge device 30 is small and the water increase stage continues for a long time, the flow velocity distribution of the water flow discharged from the water discharge unit 48 can be made uniform over a long period of time. It is obtained as a particularly effective effect.

また、本実施形態の吐水装置３０によれば、通水路４４の流入室４４ａが分岐給水路２２の水流出口２２ａより広がるように形成されるため、前述のように、通水路４４内を流れる水の流速を更に減少させてから水室４６に流出させることができる。よって、通水路４４から水室４６内に過度に流速の速い水が流出するのをより効果的に防止できる。 Further, according to the water discharge device 30 of the present embodiment, the inflow chamber 44a of the water passage 44 is formed so as to expand from the water outlet 22a of the branch water supply passage 22, so that the water flowing in the water passage 44 is described as described above. The flow velocity of the water can be further reduced and then discharged to the water chamber 46. Therefore, it is possible to more effectively prevent water having an excessively high flow velocity from flowing out from the water passage 44 into the water chamber 46.

また、図４を用いて説明したように、水室４６の下内面４６ｂは通水路４４からの水の流出方向Ｐａに向かって上り勾配で傾斜しているため、次の利点がある。ボールタップ２４が閉弁して分岐給水路２２からの給水が停止した状況を考える。この状況のときに水室４６内に残る水（以下、残水という）の一部は、水室４６の下内面４６ｂの勾配により通水路４４に案内されることで、水室４６内から通水路４４に排水される。仮に、水室４６に残水が滞留し続けると、水室４６内への給水の停止後、長期間に亘り吐水孔５０から水が流れ出てしまい、外観上の見栄えを損なってしまう。この点、前述の傾斜があれば、水室４６内の残水を自重により通水路４４に案内でき、水室４６内の残水を早期に通水路４４に排水できるようになる。よって、分岐給水路２２からの給水の停止後、吐水孔５０から水が流れ出る期間を短くでき、外観上良好な見栄えを得やすくなる。 Further, as described with reference to FIG. 4, the lower inner surface 46b of the water chamber 46 is inclined in an upward gradient toward the outflow direction Pa of water from the water passage 44, and thus has the following advantages. Consider a situation in which the ball tap 24 is closed and the water supply from the branch water supply channel 22 is stopped. In this situation, a part of the water remaining in the water chamber 46 (hereinafter referred to as residual water) is guided to the water passage 44 by the gradient of the lower inner surface 46b of the water chamber 46, so that the water can flow from the inside of the water chamber 46. It is drained to the water channel 44. If the residual water continues to stay in the water chamber 46, the water will flow out from the spout hole 50 for a long period of time after the water supply to the water chamber 46 is stopped, and the appearance will be impaired. In this respect, if there is the above-mentioned inclination, the residual water in the water chamber 46 can be guided to the water passage 44 by its own weight, and the residual water in the water chamber 46 can be drained to the water passage 44 at an early stage. Therefore, after the water supply from the branch water supply channel 22 is stopped, the period during which the water flows out from the water discharge hole 50 can be shortened, and it becomes easy to obtain a good appearance.

なお、図８に示すように、通水路４４の流出口４４ｃの上端縁４４ｃａは、給水管２８の水流出口２２ａの下端縁２２ａａより鉛直方向の高位置に設けられる。また、給水管２８の水流出口２２ａは分岐給水路２２の最も鉛直方向の高位置に設けられ、タンク給水路２０の下流端部２０ａ（図２参照）は分岐給水路２２より低位置に設けられる。これにより、水室４６から通水路４４に排水された水を給水管２８の水流出口２２ａに排水し、かつ、給水管２８を通してタンク給水路２０の下流端部２０ａからタンク１８内に排水できる。 As shown in FIG. 8, the upper end edge 44ca of the outlet 44c of the water passage 44 is provided at a position higher in the vertical direction than the lower end edge 22aa of the water outlet 22a of the water supply pipe 28. Further, the water outlet 22a of the water supply pipe 28 is provided at the highest position in the vertical direction of the branch water supply channel 22, and the downstream end portion 20a (see FIG. 2) of the tank water supply channel 20 is provided at a position lower than the branch water supply channel 22. .. As a result, the water drained from the water chamber 46 to the water passage 44 can be drained to the water outlet 22a of the water supply pipe 28, and can be drained into the tank 18 from the downstream end portion 20a of the tank water supply passage 20 through the water supply pipe 28.

また、図７を用いて説明したように、水室４６の左右両側の内面には、通水路４４の流出口４４ｃに向かうにつれて幅狭となるように導水面４６ｅが形成されている。よって、水室４６内の残水を通水路４４に排水するとき、水室４６の導水面４６ｅにより残水を通水路４４の流出口４４ｃに導けるようになる。このため、水室４６が左右に幅広な形状でも、水室４６内の残水の多くを通水路４４を通して排水し易くなり、水室４６内を衛生的に保ち易くなる。 Further, as described with reference to FIG. 7, water guide surfaces 46e are formed on the inner surfaces on both the left and right sides of the water chamber 46 so as to become narrower toward the outlet 44c of the water passage 44. Therefore, when the residual water in the water chamber 46 is drained to the water passage 44, the residual water can be guided to the outflow port 44c of the water passage 44 by the water guide surface 46e of the water chamber 46. Therefore, even if the water chamber 46 has a wide shape to the left and right, most of the residual water in the water chamber 46 can be easily drained through the water passage 44, and the inside of the water chamber 46 can be easily kept hygienic.

また、水室４６には横向きに水が流出し、かつ、吐水部４８は吐水孔５０から下向きに吐水するため、次の利点がある。吐水部４８の吐水範囲を広くするためには、吐水孔５０を吐水部４８の広い範囲に形成するため、吐水孔５０からの吐水方向と直交する二方向での吐水部４８の寸法の大型化を要する。ここで、仮に、吐水部４８が吐水孔５０から横向きに吐水する場合、通水路４４の流出口４４ｃに対して水の流出方向Ｐａに吐水部４８が設けられる。この場合、前述の二方向での吐水部４８の寸法を大型化すると、それに伴い水室４６の高さ寸法（図４の中心軸線ＣＬ４に沿った方向での水室４６の寸法）の増大を招く。この点、本実施形態のように、吐水部４８が吐水孔５０から下向きに吐水する場合、吐水部４８の吐水方向と直交する二方向での吐水部４８の寸法が大型化したとしても、水室４６の高さ寸法の増大を招かない。よって、吐水部４８の吐水範囲を広くしつつ、水室４６の高さ寸法を効果的に抑えることができる。 Further, since water flows out to the water chamber 46 sideways and the water discharge portion 48 discharges water downward from the water discharge hole 50, there are the following advantages. In order to widen the water discharge range of the water discharge portion 48, the water discharge hole 50 is formed in a wide range of the water discharge portion 48, so that the size of the water discharge portion 48 is increased in two directions orthogonal to the water discharge direction from the water discharge hole 50. Needs. Here, if the water discharge unit 48 discharges water sideways from the water discharge hole 50, the water discharge unit 48 is provided in the water outflow direction Pa with respect to the outlet 44c of the water passage 44. In this case, if the size of the water discharge portion 48 in the above-mentioned two directions is increased, the height dimension of the water chamber 46 (the dimension of the water chamber 46 in the direction along the central axis CL4 in FIG. 4) is increased accordingly. Invite. In this respect, when the water discharge unit 48 discharges water downward from the water discharge hole 50 as in the present embodiment, even if the size of the water discharge unit 48 in two directions orthogonal to the water discharge direction of the water discharge unit 48 becomes large, water is discharged. It does not increase the height dimension of the chamber 46. Therefore, the height dimension of the water chamber 46 can be effectively suppressed while widening the water discharge range of the water discharge unit 48.

また、水室４６は通水路４４の前方に配置され、衝突面５２は通水路４４の上内面４４ａｄから下内面４４ａｃに向かって延びる段差面であるため、次の利点がある。通水路４４の衝突面５２を通水路４４の下内面４４ａｃから上内面４４ａｄに向けて延びる段差面とし、本実施形態の水室４６と同じ寸法の水室を流出口４４ｃとの相対位置が同じとなる位置に設ける場合を第２参考例とする。本実施形態によれば、通水路４４や水室４６の上内面４４ａｄが前側に向かって上り勾配で傾斜するように設ける場合に、参考例と比べて、通水路４４や水室４６を含めた箇所の鉛直方向での高さ寸法Ｈ１を抑えられる。よって、通水路４４に衝突面５２を設けつつ、通水路４４や水室４６を含めた箇所の高さ寸法Ｈ１を抑えられる。 Further, since the water chamber 46 is arranged in front of the water passage 44 and the collision surface 52 is a stepped surface extending from the upper inner surface 44ad of the water passage 44 toward the lower inner surface 44ac, there are the following advantages. The collision surface 52 of the water passage 44 is a stepped surface extending from the lower inner surface 44ac of the water passage 44 toward the upper inner surface 44ad, and the water chamber having the same dimensions as the water chamber 46 of the present embodiment has the same relative position to the outlet 44c. A second reference example is the case where the water is provided at the position where. According to the present embodiment, when the upper inner surface 44ad of the water passage 44 and the water chamber 46 is provided so as to incline toward the front side with an upward slope, the water passage 44 and the water chamber 46 are included as compared with the reference example. The height dimension H1 in the vertical direction of the portion can be suppressed. Therefore, while providing the collision surface 52 in the water passage 44, the height dimension H1 of the portion including the water passage 44 and the water chamber 46 can be suppressed.

なお、ハウジング３４は、水室４６が内部に形成される前側壁部分３４ｃと、通水路４４の一部となる流入室４４ａが内部に形成される後側壁部分３４ｄとを有する。前側壁部分３４ｃは左右に幅広かつ扁平な形状であり、その下面部には前述の吐水部４８が形成される。ハウジング３４は、吐水部４８の吐水方向（吐水孔５０の中心軸線ＣＬ４に沿った方向）が鉛直線に対して傾斜するように手洗器２６に取り付けられる。後側壁部分３４ｄは筒状をなす。前側壁部分３４ｃの上面部と後側壁部分３４ｄの上面部とは前側に向かって上り勾配で傾斜するように設けられる。前側壁部分３４ｃと後側壁部分３４ｄとの間には後側壁部分３４ｄの上面部から前側壁部分３４ｃの上面部に向かって下向きに延びる段差部分３４ｅが形成される。前述のハウジング３４の衝突面５２はこの段差部分３４ｅの内側に形成される。 The housing 34 has a front side wall portion 34c in which the water chamber 46 is formed inside, and a rear side wall portion 34d in which the inflow chamber 44a, which is a part of the water passage 44, is formed inside. The front side wall portion 34c has a wide and flat shape on the left and right, and the above-mentioned water discharge portion 48 is formed on the lower surface portion thereof. The housing 34 is attached to the hand washing device 26 so that the water discharge direction of the water discharge portion 48 (the direction along the central axis CL4 of the water discharge hole 50) is inclined with respect to the vertical line. The rear side wall portion 34d has a tubular shape. The upper surface portion of the front side wall portion 34c and the upper surface portion of the rear side wall portion 34d are provided so as to incline toward the front side with an upward slope. A step portion 34e extending downward from the upper surface portion of the rear side wall portion 34d toward the upper surface portion of the front side wall portion 34c is formed between the front side wall portion 34c and the rear side wall portion 34d. The collision surface 52 of the housing 34 is formed inside the stepped portion 34e.

前述の第２参考例は、ハウジング３４の後側壁部分３４ｄの下面部から前側壁部分３４ｃの下面部に向かって下向きに延びる段差部分を有するとする。以上の構成によれば、前側壁部分３４ｃや後側壁部分３４ｄの上面部が前側に向かって上り勾配で傾斜するように設けられる場合に、第２参考例と比べて、ハウジング３４の壁部分３４ｃ、３４ｄの鉛直方向での高さ寸法Ｈ２を抑えられる。ここでの高さ寸法Ｈ２とは、あくまでハウジング３４の外内を隔てる壁部分３４ｃ、３４ｄの高さ寸法であり、壁部分３４ｃ、３４ｄに設けられるリブ３４ｆを除いた寸法をいう。よって、ハウジング３４の通水路４４に衝突面５２を設けつつ、ハウジング３４の壁部分３４ｃ、３４ｄの高さ寸法Ｈ２を抑えられる。 It is assumed that the second reference example described above has a stepped portion extending downward from the lower surface portion of the rear side wall portion 34d of the housing 34 toward the lower surface portion of the front side wall portion 34c. According to the above configuration, when the upper surface portions of the front side wall portion 34c and the rear side wall portion 34d are provided so as to incline toward the front side with an upward slope, the wall portion 34c of the housing 34 is compared with the second reference example. , 34d height dimension H2 in the vertical direction can be suppressed. The height dimension H2 here is the height dimension of the wall portions 34c and 34d that separate the outside and the inside of the housing 34, and refers to the dimension excluding the ribs 34f provided on the wall portions 34c and 34d. Therefore, the height dimension H2 of the wall portions 34c and 34d of the housing 34 can be suppressed while providing the collision surface 52 in the water passage 44 of the housing 34.

次に、本実施形態の吐水装置３０の他の特徴を説明する。
吐水部４８に形成される吐水孔５０の合計孔断面積をＳ１［ｍｍ２］とする。ここでの合計孔断面積Ｓ１とは、吐水孔５０の中心軸線に直交する断面での吐水孔５０の断面積を孔断面積としたとき、複数の吐水孔５０それぞれの孔断面積の合計値をいう。本実施形態とは異なるが、単数の吐水孔５０しかない場合、合計孔断面積Ｓ１は単数の吐水孔５０の孔断面積をいう。ここでの孔断面積は、吐水孔５０の水導入口５０ａから水導出口５０ｂまでの範囲の中で最小となる箇所での孔断面積をいう。 Next, another feature of the water discharge device 30 of this embodiment will be described.
The total hole cross-sectional area of the water discharge holes 50 formed in the water discharge portion 48 is S1 [mm 2 ]. The total hole cross-sectional area S1 here is the total value of the hole cross-sectional areas of each of the plurality of water discharge holes 50, where the cross-sectional area of the water discharge holes 50 in the cross section orthogonal to the central axis of the water discharge holes 50 is the hole cross-sectional area. To say. Although different from the present embodiment, when there is only a single water discharge hole 50, the total hole cross-sectional area S1 means the hole cross-sectional area of the single water discharge hole 50. The hole cross-sectional area here refers to the hole cross-sectional area at the smallest point in the range from the water inlet 50a to the water outlet 50b of the water discharge hole 50.

また、分岐給水路２２の水流出口２２ａの断面積をＳ２［ｍｍ２］とする。ここでの断面積Ｓ２とは、分岐給水路２２の流れ方向に直交する断面での水流出口２２ａの断面積をいう。 Further, the cross-sectional area of the water outlet 22a of the branch water supply channel 22 is S2 [mm 2 ]. The cross-sectional area S2 here means the cross-sectional area of the water outlet 22a in a cross section orthogonal to the flow direction of the branch water supply channel 22.

このとき、吐水孔５０の合計孔断面積Ｓ１は分岐給水路２２の水流出口２２ａの断面積Ｓ２より小さくなるように設定される。これにより、吐水部４８の単位時間当たりの全吐水量よりも、分岐給水路２２の水流出口２２ａからの単位時間当たりの通水路４４に対する流出量を多くし易くなる。よって、水室４６内を早期に水で満たし易くなり、水室４６内での位置によって流速差の少ない水流を吐水部４８から早期に吐水し易くなる。 At this time, the total hole cross-sectional area S1 of the water discharge holes 50 is set to be smaller than the cross-sectional area S2 of the water outlet 22a of the branch water supply channel 22. As a result, it becomes easier to increase the outflow amount from the water outlet 22a of the branch water supply channel 22 to the water passage 44 per unit time than the total amount of water discharged per unit time of the water discharge unit 48. Therefore, it becomes easy to fill the inside of the water chamber 46 with water at an early stage, and it becomes easy to discharge water with a small flow velocity difference from the water discharge unit 48 at an early stage depending on the position in the water chamber 46.

なお、分岐給水路２２や通水路４４の連通水路４４ｂは、予め定められた最小断面積以上の水路断面積となるように設定される。本実施形態では分岐給水路２２と連通水路４４ｂの水路断面積が最小断面積に設定されている。これにより、分岐給水路２２から水室４６に水が流れるまでの間に大きい通水抵抗が付与され難くなり、これらを流れる水の水圧の増大を防止できる。 The branch water supply channel 22 and the communication channel 44b of the channel 44 are set so as to have a channel cross-sectional area equal to or larger than a predetermined minimum cross-sectional area. In the present embodiment, the cross-sectional area of the branch water supply channel 22 and the communication channel 44b is set to the minimum cross-sectional area. As a result, it becomes difficult to impart a large water flow resistance between the branch water supply channel 22 and the water flow to the water chamber 46, and it is possible to prevent an increase in the water pressure of the water flowing through these channels.

図４、図７を参照する。吐水部４８は、吐水部４８の内面４８ａから突き出る複数の筒状部５４を有する。筒状部５４の外周面は円形状をなす。前述の吐水孔５０は、筒状部５４の内側を筒軸方向に貫通するように形成される。吐水孔５０の水導入口５０ａは、吐水部４８の内面４８ａから筒軸方向に離れた位置に形成されることになる。この理由を説明する。 See FIGS. 4 and 7. The water spouting portion 48 has a plurality of tubular portions 54 protruding from the inner surface 48a of the water spouting portion 48. The outer peripheral surface of the tubular portion 54 has a circular shape. The water discharge hole 50 described above is formed so as to penetrate the inside of the tubular portion 54 in the tubular axial direction. The water inlet 50a of the water discharge hole 50 is formed at a position separated from the inner surface 48a of the water discharge portion 48 in the tubular axis direction. The reason for this will be explained.

本発明者は、実験的検討をした結果、水室４６内に溜めた水を筒状部５４のない吐水部４８から吐水する構造の場合、吐水部４８の吐水孔５０から吐水される水流が乱れるケースがあるとの知見を得た。このような乱れは、通水路４４から水室４６内に水が流出しはじめた増水段階にあるとき、特に生じ易くなっていた。このような乱れが生じると、吐水部４８の外側で吐水孔５０周りに飛沫が生じる原因になる。 As a result of experimental studies, the present inventor has found that in the case of a structure in which the water stored in the water chamber 46 is discharged from the water discharge portion 48 having no tubular portion 54, the water flow discharged from the water discharge hole 50 of the water discharge portion 48 is generated. It was found that there are cases of disorder. Such turbulence was particularly likely to occur during the flooding stage when water began to flow out from the water passage 44 into the water chamber 46. When such a disorder occurs, it causes droplets to be generated around the water discharge hole 50 on the outside of the water discharge portion 48.

この原因は不明であるが、本発明者は、前述の筒状部５４を有する吐水部４８を用いたところ、このような吐水部４８から吐水される水流の乱れを抑えるのに効果があるという知見を得た。これにより、吐水部４８の外側で吐水孔５０周りに飛沫が生じるのを防止できる。 Although the cause of this is unknown, the present inventor says that when the water spouting portion 48 having the above-mentioned tubular portion 54 is used, it is effective in suppressing the turbulence of the water flow discharged from the water spouting portion 48. I got the knowledge. As a result, it is possible to prevent droplets from being generated around the water discharge hole 50 on the outside of the water discharge portion 48.

このことから、前述の筒状部５４のない吐水部４８から吐水する構造の場合、吐水部４８の内面４８ａの近くを通る水流に乱れが生じていると推察される。前述の構成によれば、吐水部４８の内面４８ａから離れた位置に吐水孔５０の水導入口５０ａが形成されることになる。よって、吐水部４８の内面４８ａの近くを通る水流が乱れたとしても、水導入口５０ａから吐水孔５０に導入される水は、その水流の乱れの影響を受けにくくなり、吐水部４８から吐水される水流の乱れも抑えられると推察される。 From this, it is presumed that in the case of the structure in which water is discharged from the water discharge portion 48 without the tubular portion 54, the water flow passing near the inner surface 48a of the water discharge portion 48 is turbulent. According to the above configuration, the water inlet 50a of the water discharge hole 50 is formed at a position away from the inner surface 48a of the water discharge portion 48. Therefore, even if the water flow passing near the inner surface 48a of the water discharge unit 48 is disturbed, the water introduced into the water discharge hole 50 from the water inlet 50a is less likely to be affected by the turbulence of the water flow, and the water is discharged from the water discharge unit 48. It is presumed that the turbulence of the water flow will be suppressed.

また、水室４６内の水に微細な気泡が混入している場合、その気泡が混入された状態のままで吐水孔５０から吐水されてしまうと、吐水孔５０から吐水される水流の透明度が意図せず低くなってしまう。この点、前述の構成によれば、筒状部５４の内側に吐水孔５０が形成されるため、吐水孔５０の水導入口５０ａから水導出口５０ｂまでの水路長を長くできる。よって、吐水孔５０内を流れる水を整流し易くなり、その水に混入する気泡量を減らすことで、吐水孔５０から吐水される水流の透明度を高められる。 Further, when fine bubbles are mixed in the water in the water chamber 46, if the water is discharged from the water discharge hole 50 with the bubbles mixed, the transparency of the water flow discharged from the water discharge hole 50 becomes high. It goes down unintentionally. In this respect, according to the above-described configuration, since the water discharge hole 50 is formed inside the tubular portion 54, the length of the water channel from the water inlet 50a to the water outlet 50b of the water discharge hole 50 can be lengthened. Therefore, it becomes easy to rectify the water flowing in the water discharge hole 50, and by reducing the amount of bubbles mixed in the water, the transparency of the water flow discharged from the water discharge hole 50 can be increased.

なお、筒状部５４の内周面には、吐水方向とは反対側（図中上側）の内端部から吐水方向に向かうにつれて縮径するようなテーパー面５４ａが形成される。このテーパー面５４ａは、金型を用いた射出成形等によりハウジング３４を成形するときに抜き勾配として機能し、ハウジング３４の成形性を高められる。 A tapered surface 54a is formed on the inner peripheral surface of the tubular portion 54 so that the diameter decreases from the inner end portion on the side opposite to the water discharge direction (upper side in the drawing) toward the water discharge direction. The tapered surface 54a functions as a draft when the housing 34 is molded by injection molding using a mold or the like, and the moldability of the housing 34 can be improved.

また、筒状部５４の内周面には、テーパー面５４ａより水導出口５０ｂ側にストレート面５４ｂが形成される。ストレート面５４ｂは筒状部５４の筒軸方向に向かって同等の内径となるように設定される。ストレート面５４ｂがあることにより、吐水孔５０内を流れる水を更に整流し易くなる。 Further, on the inner peripheral surface of the tubular portion 54, a straight surface 54b is formed on the water outlet 50b side from the tapered surface 54a. The straight surface 54b is set to have the same inner diameter in the tubular axial direction of the tubular portion 54. The presence of the straight surface 54b makes it easier to rectify the water flowing in the water discharge hole 50.

また、吐水部４８の外面は平坦に形成されている。これは、吐水部４８の外面は吐水孔５０の周縁部に凹凸がなく平坦に形成されていることを意味する。これにより、吐水部４８の外面を布等でぬぐうとき、吐水孔５０の周縁部に布等をひっかけずに作業でき、良好な清掃性を得られる。なお、吐水孔５０の水路長を長くする観点から、吐水部４８の外面に突き出る筒状部を設け、その筒状部の内側に吐水孔５０を形成してもよい。 Further, the outer surface of the water discharge portion 48 is formed flat. This means that the outer surface of the water discharge portion 48 is formed flat without unevenness on the peripheral edge portion of the water discharge hole 50. As a result, when the outer surface of the water spouting portion 48 is wiped with a cloth or the like, the work can be performed without catching the cloth or the like on the peripheral portion of the water spouting hole 50, and good cleaning performance can be obtained. From the viewpoint of lengthening the water channel length of the water discharge hole 50, a tubular portion protruding from the outer surface of the water discharge portion 48 may be provided, and the water discharge hole 50 may be formed inside the tubular portion.

以上、実施の形態に基づき本発明を説明したが、実施の形態は、本発明の原理、応用を示すにすぎない。また、実施の形態には、請求の範囲に規定された本発明の思想を逸脱しない範囲において、多くの変形例や配置の変更が可能である。 Although the present invention has been described above based on the embodiments, the embodiments merely show the principles and applications of the present invention. Further, in the embodiment, many modifications and arrangements can be changed without departing from the idea of the present invention defined in the claims.

手洗器２６は、ケーシング１６の上端開口部１６ａに取り付けられる例を説明したが、その取付位置は特に限定されない。手洗器２６は、たとえば、タンク１８の上端開口部に蓋として取り付けられてもよいし、キャビネットのカウンター上に取り付けられてもよい。また、手洗器２６は、ケーシング１６と一体成形により設けられていてもよい。 Although the example in which the hand wash device 26 is attached to the upper end opening 16a of the casing 16 has been described, the attachment position thereof is not particularly limited. The hand wash device 26 may be attached, for example, to the upper end opening of the tank 18 as a lid, or may be attached to the counter of the cabinet. Further, the hand wash device 26 may be provided by being integrally molded with the casing 16.

吐水孔５０はシャワー状の水流を吐水するために吐水部４８に複数形成される例を説明した。この他にも、吐水孔５０は、滝状の水流を吐水するために吐水部４８にスリット状に形成されてもよい。つまり、吐水部４８にはシャワー状又は滝状の水流を吐水するための吐水孔５０が形成されていればよい。また、吐水部４８は、吐水孔５０から幅広な範囲にシャワー状又は滝状の水流を吐水するように構成されてもよい。 An example has been described in which a plurality of water discharge holes 50 are formed in the water discharge portion 48 in order to discharge a shower-like water stream. In addition to this, the water discharge hole 50 may be formed in a slit shape in the water discharge portion 48 in order to discharge water in a waterfall shape. That is, the water spouting portion 48 may be formed with a spouting hole 50 for spouting a shower-shaped or waterfall-shaped water stream. Further, the water discharge unit 48 may be configured to discharge a shower-shaped or waterfall-shaped water stream from the water discharge hole 50 in a wide range.

通水路４４の流入室４４ａは、ハウジング３４の雌側接続筒部３４ａの底部と給水管２８の雄側接続筒部２８ａとに囲まれて形成される例を説明した。この他にも、通水路４４の流入室４４ａは、ハウジング３４の内部に単一の部材のみで形成されてもよいし、給水管２８以外の他部材とハウジング３４とにより囲まれて形成されてもよい。これらの場合、通水路４４の流入室４４ａには、分岐給水路２２ではなく他の水路が上流側水路として連なるように設けられる。 An example has been described in which the inflow chamber 44a of the water passage 44 is formed by being surrounded by the bottom portion of the female side connecting cylinder portion 34a of the housing 34 and the male side connecting cylinder portion 28a of the water supply pipe 28. In addition to this, the inflow chamber 44a of the water passage 44 may be formed of only a single member inside the housing 34, or may be formed so as to be surrounded by other members other than the water supply pipe 28 and the housing 34. May be good. In these cases, the inflow chamber 44a of the water passage 44 is provided so that a water channel other than the branch water supply channel 22 is connected as an upstream water channel.

通水路４４は、上流側水路２２の水流出口２２ａから流入する水を衝突面５２と衝突させた水を、更に他の面と衝突させてから、つまり、二回衝突させてから連通水路４４ｂに導かれるように構成される例を説明した。この衝突回数は特に限られず、たとえば、通水路４４は衝突面５２と衝突させた水が流れ方向を変更した後、その流れ先に連通水路４４ｂがあってもよい。 The water passage 44 is formed after the water flowing from the water outlet 22a of the upstream water channel 22 collides with the collision surface 52 and then collides with another surface, that is, after being collided twice, into the communication water channel 44b. An example configured to be guided has been described. The number of collisions is not particularly limited. For example, the water passage 44 may have a communication passage 44b at the flow destination after the water colliding with the collision surface 52 changes the flow direction.

水室４６の前側部分４６ｄは後側部分４６ｃとの境界箇所において後側部分４６ｃより左右の内幅寸法が大きくなるように形成される例を説明した。この水室４６の前側部分４６ｄは後側部分４６ｃとの境界箇所において後側部分４６と左右の内幅寸法が同じになるように形成されてもよい。この場合、水室４６の前側部分４６ｄと後側部分４６ｃとの境界箇所に前側に臨む段差面が形成されず、水室４６内に残水が残り難くなり、水室４６内をえさらに衛生的に保ち易くなる。 An example has been described in which the front side portion 46d of the water chamber 46 is formed so that the left and right inner width dimensions are larger than the rear side portion 46c at the boundary portion with the rear side portion 46c. The front side portion 46d of the water chamber 46 may be formed so that the left and right inner width dimensions are the same as those of the rear side portion 46 at the boundary portion with the rear side portion 46c. In this case, a stepped surface facing the front side is not formed at the boundary between the front side portion 46d and the rear side portion 46c of the water chamber 46, and it becomes difficult for residual water to remain in the water chamber 46, further sanitizing the inside of the water chamber 46. It becomes easier to keep the target.

水室４６の導水面４６ｅは、水室４６の左右両側の内面に形成される例を説明したが、左右一方の内面のみに形成されてもよい。 Although the example in which the water guiding surface 46e of the water chamber 46 is formed on the inner surfaces on both the left and right sides of the water chamber 46 has been described, it may be formed on only one of the left and right inner surfaces.

以上の実施形態、変形例により具体化される発明を一般化すると、以下の技術的思想が導かれる。以下、発明が解決しようとする課題に記載の態様を用いて説明する。 Generalization of the invention embodied by the above embodiments and modifications leads to the following technical ideas. Hereinafter, the aspects described in the problem to be solved by the invention will be described.

第２の態様の吐水装置は、第１の態様において、前記通水路は、前記上流側水路から水が流入し、前記衝突面が形成される流入室を有し、前記流入室は、前記上流側水路の水流出口より前記水流出口の中心軸線の径方向外側に広がるように形成されてもよい。
この態様によれば、衝突面と衝突した水を流入室内の広い範囲に大きく拡散させることで、更に流速を減少させることができる。よって、通水路から水室内に過度に流速の速い水が流出するのをより効果的に防止できる。 In the water discharge device of the second aspect, in the first aspect, the water passage has an inflow chamber into which water flows in from the upstream side water channel and the collision surface is formed, and the inflow chamber is the upstream. It may be formed so as to extend outward in the radial direction of the central axis of the water outlet from the water outlet of the side channel.
According to this aspect, the flow velocity can be further reduced by largely diffusing the water colliding with the collision surface over a wide area in the inflow chamber. Therefore, it is possible to more effectively prevent water having an excessively high flow velocity from flowing out from the water passage into the water chamber.

第３の態様の吐水装置は、第１又は第２の態様において、前記吐水部は、前記吐水部の内面から突き出る筒状部を有し、前記吐水孔は、前記筒状部の内側に形成されてもよい。
この態様によれば、吐水部から吐水される水流の乱れを抑えられ、吐水部の外側で吐水孔周りに飛沫が生じるのを防止できる。 In the water discharge device of the third aspect, in the first or second aspect, the water discharge portion has a tubular portion protruding from the inner surface of the water discharge portion, and the water discharge hole is formed inside the tubular portion. May be done.
According to this aspect, the turbulence of the water flow discharged from the water discharge portion can be suppressed, and the droplets can be prevented from being generated around the water discharge hole on the outside of the water discharge portion.

第４の態様の吐水装置は、第１〜第３のいずれかの態様において、前記吐水孔の合計孔断面積は、前記上流側水路の水流出口の断面積より小さくなるように設定されてもよい。
この態様によれば、吐水部の単位時間当たりの全吐水量よりも、上流側水路の水流出口からの単位時間当たりの通水路に対する流出量を多くし易くなる。よって、水室内を早期に水で満たし易くなり、水室内での位置によって流速差の少ない水流を吐水部から早期に吐水し易くなる。 In the water discharge device of the fourth aspect, even if the total hole cross-sectional area of the water discharge holes is set to be smaller than the cross-sectional area of the water outlet of the upstream water channel in any one of the first to third aspects. Good.
According to this aspect, it becomes easier to increase the outflow amount from the water outlet of the upstream waterway to the water passage per unit time than the total amount of water discharged per unit time of the water discharge part. Therefore, it becomes easy to fill the water chamber with water at an early stage, and it becomes easy to discharge a water flow having a small flow velocity difference from the water discharge portion at an early stage depending on the position in the water chamber.

第５の態様の吐水装置は、前記水室は、前記通水路の前方に配置され、前記衝突面は、前記通水路の上内面から下内面に向けて延びる段差面であってもよい。
通水路の衝突面を通水路の下内面から上内面に向けて延びる段差面とし、本態様の水室と同じ寸法の水室を流出口との相対位置が同じとなる位置に設ける場合を参考例とする。この態様によれば、通水路や水室の上内面が前側に向かって上り勾配で傾斜するように設ける場合に、参考例と比べて、通水路や水室を含めた箇所の高さ寸法を抑えられる。よって、通水路に衝突面を設けつつ、通水路や水室を含めた箇所の高さ寸法を抑えられる。 In the water discharge device of the fifth aspect, the water chamber may be arranged in front of the water passage, and the collision surface may be a stepped surface extending from the upper inner surface to the lower inner surface of the water passage.
Refer to the case where the collision surface of the water passage is a stepped surface extending from the lower inner surface to the upper inner surface of the water channel, and a water chamber having the same dimensions as the water chamber of this embodiment is provided at a position where the relative position with the outlet is the same. Take as an example. According to this aspect, when the upper inner surface of the water passage or the water chamber is provided so as to incline toward the front side with an upward slope, the height dimension of the portion including the water passage or the water chamber is set as compared with the reference example. It can be suppressed. Therefore, while providing a collision surface in the water passage, the height dimension of the portion including the water passage and the water chamber can be suppressed.

第６の態様の吐水装置は、第１〜第５のいずれかの態様において、前記衝突面は、前記上流側水路の水流出口に対して、前記水流出口からの水の流出方向に設けられてもよい。 In the water discharge device of the sixth aspect, in any one of the first to fifth aspects, the collision surface is provided in the direction of water outflow from the water outlet with respect to the water outlet of the upstream water channel. May be good.

本発明の他の態様は手洗装置である。第７の態様の手洗装置は、手洗器と、前述のいずれの態様の吐水装置と、を備え、前記水室には、前記通水路から横向きに水が流出し、前記水室の下内面は、前記通水路からの水の流出方向に向かって上り勾配で傾斜している。
この態様によれば、水室内の残水を自重により通水路に案内でき、水室内の残水を早期に通水路に排水できるようになる。よって、上流側水路からの給水の停止後、吐水孔から水が流れ落ちる期間を短くでき、外観上良好な見栄えを得やすくなる。 Another aspect of the present invention is a hand washing device. The hand washing device of the seventh aspect includes a hand washing device and a water spouting device of any of the above-described modes, and water flows out to the water chamber sideways from the water passage, and the lower inner surface of the water chamber is , It is inclined uphill toward the outflow direction of water from the water passage.
According to this aspect, the residual water in the water chamber can be guided to the water passage by its own weight, and the residual water in the water chamber can be drained to the water passage at an early stage. Therefore, after the water supply from the upstream water channel is stopped, the period during which the water flows down from the spout hole can be shortened, and it becomes easy to obtain a good appearance.

第８の態様の手洗装置は、第７の態様において、前記吐水部は、前記吐水孔から下向きに吐水してもよい。
この態様によれば、吐水部の吐水範囲を広くしつつ、水室の高さ寸法を効果的に抑えられる。 In the seventh aspect of the hand washing device of the eighth aspect, the water spouting portion may spout water downward from the spouting hole.
According to this aspect, the height dimension of the water chamber can be effectively suppressed while widening the water discharge range of the water discharge portion.

第９の態様の手洗装置は、第７又は第８の態様において、前記水室は、前記通水路の流出口より左右に幅広な形状であり、前記水室の左右両側又は一方の内面には、前記流出口に向かうにつれて幅狭となるように導水面が形成されていてもよい。
この態様によれば、水室内の残水を通水路に排水するとき、水室の導水面により残水を通水路の流出口に導けるようになる。このため、水室が左右に幅広な形状でも、水室内の残水の多くを通水路を通して排水し易くなり、水室内を衛生的に保ち易くなる。 In the seventh or eighth aspect of the hand washing device of the ninth aspect, the water chamber has a shape wider to the left and right than the outlet of the water passage, and is formed on both the left and right sides or one of the inner surfaces of the water chamber. , The water guide surface may be formed so as to become narrower toward the outlet.
According to this aspect, when the residual water in the water chamber is drained to the water passage, the residual water can be guided to the outlet of the water passage by the water guide surface of the water chamber. Therefore, even if the water chamber has a wide shape to the left and right, most of the residual water in the water chamber can be easily drained through the water passage, and the water chamber can be easily maintained hygienically.

１０…手洗装置、１４…便器、１８…便器洗浄タンク、２０…タンク給水路、２２…上流側水路、２２ａ…水流出口、２６…手洗器、２８…給水管、３０…吐水装置、３４…ハウジング、４４…通水路、４４ａ…流入室、４４ａｃ…下内面、４４ｂ…連通水路、４４ｃ…流出口、４６…水室、４６ｅ…導水面、４８…吐水部、４８ａ…内面、５０…吐水孔、５２…衝突面、５４…筒状部。 10 ... Hand wash device, 14 ... Toilet bowl, 18 ... Toilet bowl wash tank, 20 ... Tank water supply channel, 22 ... Upstream water channel, 22a ... Water outlet, 26 ... Hand wash device, 28 ... Water supply pipe, 30 ... Water discharge device, 34 ... Housing , 44 ... Water channel, 44a ... Inflow chamber, 44ac ... Lower inner surface, 44b ... Communication channel, 44c ... Outlet, 46 ... Water chamber, 46e ... Water guide surface, 48 ... Water discharge part, 48a ... Inner surface, 50 ... Water discharge hole, 52 ... Collision surface, 54 ... Cylindrical part.

Claims (9)

便器洗浄タンクに給水するタンク給水路を給水源とし、手洗器の外側に取り付けられる吐水装置であって、
上流側水路から水が流入する通水路と、
前記通水路から流出する水を一時的に溜めるための水室と、
前記水室に溜められる水を吐水孔から吐水するための吐水部と、を有し、
前記手洗器は、鉢部と、前記鉢部の外周側に配置される外周壁部とを備え、
前記上流側水路は、前記上流側水路から前記通水路に水が流出する水流出口を有し、
前記通水路は、前記水流出口の中心軸線の延長線上に設けられ、前記通水路内を流れる水が衝突する衝突面を有し、
前記衝突面を有する前記通水路は、前記外周壁部と前記鉢部との間には配置されず、前記手洗器の外側において本吐水装置の内部に配置されることを特徴とする吐水装置。 It is a water discharge device that is attached to the outside of the hand washer with the tank water supply channel that supplies water to the toilet bowl washer as the water supply source.
A waterway through which water flows in from the upstream waterway, and
A water chamber for temporarily storing the water flowing out of the waterway, and
It has a water discharge part for discharging the water stored in the water chamber from the water discharge hole.
The hand washer includes a pot portion and an outer peripheral wall portion arranged on the outer peripheral side of the pot portion.
The upstream canal has a water outlet through which water flows from the upstream canal to the canal.
The water passage is provided on an extension of the central axis of the water outlet, and has a collision surface on which water flowing in the water passage collides.
It said water passage having the impact surface, characterized in that said not arranged between the outer peripheral wall portion and the bowl portion is disposed inside the Oite the water discharger to the outside of the water basin water discharge apparatus. 前記通水路は、前記上流側水路から水が流入し、前記衝突面が形成される流入室を有し、
前記流入室は、前記上流側水路の前記水流出口より前記水流出口の中心軸線に直交する断面での断面積が大きくなるように形成される請求項１に記載の吐水装置。 The water passage has an inflow chamber in which water flows in from the upstream water channel and the collision surface is formed.
The water discharge device according to claim 1, wherein the inflow chamber is formed so that the cross-sectional area of the upstream water channel at a cross section orthogonal to the central axis of the water outlet is larger than that of the water outlet. 前記吐水部は、前記吐水部の内面から突き出る筒状部を有し、
前記吐水孔は、前記筒状部の内側に形成される請求項１又は２に記載の吐水装置。 The water spouting portion has a tubular portion protruding from the inner surface of the water spouting portion.
The water discharge device according to claim 1 or 2, wherein the water discharge hole is formed inside the tubular portion. 前記吐水孔の合計孔断面積は、前記上流側水路の前記水流出口の断面積より小さくなるように設定される請求項１〜３のいずれかに記載の吐水装置。 The total Anadan area of the water discharge holes, the water discharge device according to any one of claims 1 to 3 is set to be smaller than the cross-sectional area of the water outlet of the upstream side water passage. 前記水室は、前記通水路の前方に配置され、
前記衝突面は、前記通水路の上内面から下内面に向けて延びる段差面である請求項１〜４のいずれかに記載の吐水装置。 The water chamber is arranged in front of the water channel and is located in front of the water channel.
The water discharge device according to any one of claims 1 to 4, wherein the collision surface is a stepped surface extending from the upper inner surface to the lower inner surface of the water passage. 前記衝突面は、前記上流側水路の前記水流出口に対して、前記水流出口からの水の流出方向に設けられる請求項１〜５のいずれかに記載の吐水装置。 The water discharge device according to any one of claims 1 to 5, wherein the collision surface is provided in a direction in which water flows out from the water outlet with respect to the water outlet of the upstream water channel. 手洗器と、
請求項１〜６のいずれかに記載の吐水装置と、を備え、
前記水室には、前記通水路から横向きに水が流出し、
前記水室の下内面は、前記通水路からの水の流出方向に向かって上り勾配で傾斜していることを特徴とする手洗装置。 With a hand washer
The water discharge device according to any one of claims 1 to 6 is provided.
Water flows out to the water chamber sideways from the water channel,
A hand washing device characterized in that the lower inner surface of the water chamber is inclined with an upward slope toward the outflow direction of water from the water passage. 前記吐水部は、前記吐水孔から下向きに吐水する請求項７に記載の手洗装置。 The hand-washing device according to claim 7, wherein the water discharge unit discharges water downward from the water discharge hole. 前記水室は、前記通水路の流出口より左右に幅広な形状であり、
前記水室の左右両側又は一方の内面には、前記流出口に向かうにつれて幅狭となるように導水面が形成されている請求項７又は８に記載の手洗装置。 The water chamber has a shape wider to the left and right than the outlet of the water passage.
The hand washing apparatus according to claim 7 or 8, wherein a water guiding surface is formed on the left and right sides or one of the inner surfaces of the water chamber so as to become narrower toward the outlet.
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