JP6118762B2

JP6118762B2 - Remaining hot water removal device and remaining hot water removal adapter for bathtub

Info

Publication number: JP6118762B2
Application number: JP2014128828A
Authority: JP
Inventors: 伸成小林; 正和田口; 秀樹藤澤; 正義山縣
Original assignee: 株式会社ハタノ製作所
Priority date: 2014-06-24
Filing date: 2014-06-24
Publication date: 2017-04-19
Anticipated expiration: 2034-06-24
Also published as: JP2016008753A

Description

本発明は、浴槽内に残った湯水を洗濯水等に利用する際に用いられる浴槽用残り湯取出装置および残り湯取出アダプタに関する。 The present invention relates to a remaining hot water take-out device for a bathtub and a remaining hot water take-out adapter used when hot water remaining in the bathtub is used for washing water or the like.

追い焚きができる循環式の浴槽用給湯システムにおいて、浴槽内に残った湯水（残り湯）の再利用をスムーズに行えるように、浴槽と、洗濯機が設置された洗面室等との間に残り湯取出管（お湯取り管）を設置しておき、その残り湯取出管を用いて浴槽内の残り湯を洗濯機まで送り出すようにした配管設備が周知である。 In a circulating hot water supply system for bathtubs that can be reheated, it remains between the bathtub and the washroom where the washing machine is installed so that the hot water remaining in the bathtub can be reused smoothly. A piping facility in which a hot water outlet pipe (hot water outlet pipe) is installed and the remaining hot water outlet pipe is used to send out the remaining hot water in the bathtub to the washing machine is well known.

一方、循環式の浴槽用給湯システムにおいて、浴槽側壁に組み付けられる循環金具としては、吐出回路と吸込回路との２つの回路を有する２回路式のものが一般に用いられており、このような一般的な循環金具に適用可能な残り湯利用装置としては、例えば特許文献１に示すものが周知である。 On the other hand, in the circulating hot water supply system for bathtubs, as the circulating metal fittings assembled on the side walls of the bathtub, a two-circuit type having two circuits of a discharge circuit and a suction circuit is generally used. As an apparatus for using remaining hot water that can be applied to simple circulating metal fittings, for example, the one shown in Patent Document 1 is well known.

この残り湯利用装置は、循環金具に設けられた往き管接続口および戻り管接続口が、往き管および戻り管を介して給湯器の吐出口および吸込口に接続される一方、往き管および戻り管のいずれかに、分岐管（残り湯取出管）が接続され、その残り湯取出管が洗濯機に接続される。そして追い焚き時には、給湯器から往き管を介して浴槽内に湯水を供給するとともに、浴槽内の湯水を戻り管を介して給湯器に戻す一方、残り湯取出時には、浴槽内の湯水（残り湯）を残り湯取出管を介して洗濯機に供給するようにしている。 In this remaining hot water utilization device, the forward pipe connection port and the return pipe connection port provided in the circulation fitting are connected to the discharge port and the suction port of the water heater via the forward pipe and the return pipe, while the forward pipe and the return pipe are connected. A branch pipe (remaining hot water outlet pipe) is connected to one of the pipes, and the remaining hot water outlet pipe is connected to the washing machine. When reheating, hot water is supplied from the water heater to the bathtub through the return pipe, and the hot water in the bathtub is returned to the water heater through the return pipe. ) Is supplied to the washing machine through the remaining hot water discharge pipe.

また従来においては特許文献２に示すように、浴槽側壁に取り付けられる循環金具として、残り湯取出管が直接連結されるようにした３回路式のものも周知である。この３回路式の循環金具は、循環金具の前面（浴槽内側）に、吐出口および吸込口に加えて、残り湯を取り出すための残り湯吸込口が設けられている。さらに循環金具の後端部（浴槽外側）には、上記吐出口および吸込口に加えて、残り湯取出管接続口が設けられている。そして往き管接続口および戻り管接続口が、往き管および戻り管を介して給湯器の吐出口および吸引口にそれぞれ接続されるとともに、残り湯取出管接続口が残り湯取出管を介して洗濯機に接続されている。この循環金具において、残り湯取出時には、浴槽内の残り湯が残り湯吸込口から吸い込まれ、さらにその残り湯が残り湯取出管を通って洗濯機に供給されるようになっている。 Conventionally, as shown in Patent Document 2, as a circulating metal fitting attached to the bathtub side wall, a three-circuit type in which a remaining hot water outlet pipe is directly connected is also known. This three-circuit type circulation fitting is provided with a remaining hot water suction port for taking out the remaining hot water in addition to the discharge port and the suction port on the front surface (inside the bathtub) of the circulation fitting. Furthermore, in addition to the discharge port and the suction port, a remaining hot water discharge pipe connection port is provided at the rear end (outside the bathtub) of the circulation fitting. The forward pipe connection port and the return pipe connection port are connected to the discharge port and suction port of the water heater via the forward pipe and the return pipe, respectively, and the remaining hot water outlet pipe connection port is washed through the remaining hot water outlet pipe. Connected to the machine. In this circulating metal fitting, when the remaining hot water is taken out, the remaining hot water in the bathtub is sucked from the remaining hot water suction port, and the remaining hot water is supplied to the washing machine through the remaining hot water outlet pipe.

特開２０１２−４１７９０号公報JP 2012-41790 A 特開２００３−１０２６３３号公報JP 2003-102633 A

上記特許文献１に示す従来の残り湯取出装置においては、残り湯取出管に湯水を供給するための切替弁として電磁弁が採用されている。しかしながら電磁弁は、施工時に電気工事が別途必要となり、施工作業が面倒であるという課題があった。 In the conventional remaining hot water take-out device shown in Patent Document 1, an electromagnetic valve is employed as a switching valve for supplying hot water to the remaining hot water take-out pipe. However, the electromagnetic valve has a problem that electric work is separately required at the time of construction, and the construction work is troublesome.

また仮に切替弁として、電磁弁を用いずに手動式の切替弁を用いる場合には、残り湯取出時には、手動による弁の切替操作を行う必要があり、この手動による流路切替操作が面倒であり、残り湯の取出作業を簡単に行うことができないという課題が発生する。 Also, if a manual switching valve is used as the switching valve without using a solenoid valve, it is necessary to manually switch the valve when removing the remaining hot water, and this manual switching operation is troublesome. There arises a problem that the remaining hot water can not be easily taken out.

なお切替弁を設置せずに、残り湯取出管を往き管や戻り管にただ単に分岐させておくだけでは、湯はり時や追い焚き時に往き管や戻り管を流通する湯水が残り湯取出管に導入されて、その湯水が残り湯取出管を通って洗濯機内に漏れ出して汚染されてしまうことになる。 If the remaining hot water discharge pipe is simply branched to the forward pipe or return pipe without installing a switching valve, the hot water flowing through the forward pipe or return pipe during hot water or retreating will remain. In other words, the hot water leaks into the washing machine through the remaining hot water discharge pipe and is contaminated.

一方、特許文献２に示す３回路式の循環金具においては、通常時には、槽内に開口された残り湯吸込口を栓で塞いでおき、残り湯を取り出す場合のみ、栓を外して残り湯取出口を開放するようにしている。この残り湯取出口の開放操作は、面倒なことに手動で行う必要があるため、上記と同様、残り湯の取出作業を簡単に行うことができないという課題を抱えている。 On the other hand, in the three-circuit type circulating metal fitting shown in Patent Document 2, normally, the remaining hot water inlet port opened in the tank is closed with a stopper, and the stopper is removed only when the remaining hot water is taken out. The exit is opened. Since the operation of opening the remaining hot water outlet is troublesome and needs to be performed manually, there is a problem that the operation of removing the remaining hot water cannot be easily performed as described above.

この発明は、上記の課題に鑑みてなされたものであり、必要時以外に残り湯取出管から湯水が漏れ出すような不具合を防止しつつ、残り湯の取出作業を簡単に行える上さらに、施工作業も簡単に行うことができる浴槽用残り湯取出装置および残り湯取出アダプタを提供することを目的とする。 The present invention has been made in view of the above-mentioned problems, and can easily remove the remaining hot water while preventing problems such as leakage of hot water from the remaining hot water discharge pipe other than when necessary. An object of the present invention is to provide a remaining hot water take-out device for a bathtub and a remaining hot water take-out adapter that can be easily operated.

上記目的を達成するため、本発明は以下の構成を要旨とする。 In order to achieve the above object, the gist of the present invention is as follows.

［１］一端側が浴槽内に開口する槽内吐出口に連通し、かつ他端側が給湯器の吐出口に連通する吐出管路と、一端側が浴槽内に開口する槽内吸込口に連通し、かつ他端側が給湯器の吸込口に連通する吸込管路と、前記吸込管路の途中に設けられた残り湯取出管接続口とを備え、前記残り湯取出管接続口に接続される残り湯取出管を介して浴槽内の湯水が浴槽外に取り出されるようにした浴槽用残り湯取出装置であって、
前記吸込管路における前記残り湯取出管接続口よりも他端側において、前記吐出管路および前記吸込管路間を連通する合流管路と、
前記合流管路に設けられ、前記吸込管路から前記吐出管路への湯水の流れを許容し、かつその逆方向の流れを制止する第１逆止弁と、
前記吸込管路における前記残り湯取出管接続口および前記合流管路間に設けられ、吸込方向の湯水の流れを許容し、かつその逆方向の流れを制止する第２逆止弁と、
前記残り湯取出管接続口に設けられ、前記吸込管路から残り湯取出管への湯水の流れを許容し、かつその逆方向の流れを制止する第３逆止弁とを備えたことを特徴とする浴槽用残り湯取出装置。 [1] The one end side communicates with the discharge outlet in the tank opened in the bathtub, and the other end communicates with the discharge outlet of the water heater, and the one end side communicates with the tank suction opening opened in the bathtub, And a remaining hot water connected to the remaining hot water outlet pipe connection port, the other end side including a suction pipe line communicating with the suction port of the water heater, and a remaining hot water outlet pipe connection port provided in the middle of the suction pipe line A remaining hot water take-out device for a bathtub that allows hot water in the bathtub to be taken out of the bathtub through a take-out pipe,
On the other end side of the remaining hot water outlet pipe connection port in the suction pipe, a merging pipe communicating between the discharge pipe and the suction pipe,
A first check valve provided in the merging pipe, allowing a flow of hot water from the suction pipe to the discharge pipe, and restricting a flow in the reverse direction;
A second check valve that is provided between the remaining hot water outlet pipe connection port and the merging pipe line in the suction pipe line, allows the flow of hot water in the suction direction, and restricts the flow in the reverse direction;
A third check valve provided at the remaining hot water outlet pipe connection port, allowing a flow of hot water from the suction pipe line to the remaining hot water outlet pipe, and restricting the flow in the opposite direction; The remaining hot water take-out device for the bathtub.

［２］前記第３逆止弁は、通常状態ではバネの付勢力によって弁本体が弁座に密着して閉弁状態に保持されるバネ式逆止弁によって構成されている前項１に記載の浴槽用残り湯取出装置。 [2] The third check valve according to the preceding item 1, wherein the third check valve is configured by a spring check valve in which the valve body is kept in close contact with the valve seat by a biasing force of a spring in a normal state. Remaining hot water removal device for bathtubs.

［３］前記第３逆止弁は、リング状弁座に対し弁本体が軸心方向に沿って接離移動することによって開閉されるように構成されるとともに、その開弁状態では前記弁座の開閉口を通過した湯水が前記弁本体および流路内周面間の環状流路を通過するよう構成され、
前記第３逆止弁が開弁した状態では、前記弁座の開閉口における開口面積と、前記環状流路の流路断面積とがほぼ等しくなるように調整されている前項１または２に記載の浴槽用残り湯取出装置。 [3] The third check valve is configured to be opened and closed by moving the valve main body toward and away from the ring-shaped valve seat along the axial direction, and in the opened state, the valve seat The hot and cold water that has passed through the opening and closing port is configured to pass through an annular flow path between the valve body and the inner peripheral surface of the flow path,
3. The preceding item 1 or 2 wherein the opening area of the valve seat opening and closing and the flow passage cross-sectional area of the annular flow passage are adjusted to be substantially equal when the third check valve is opened. Remaining hot water removal device for bathtubs.

［４］前記第１逆止弁は、通常状態では少量開弁した状態に調整されている前項１〜３のいずれか１項に記載の浴槽用残り湯取出装置。 [4] The remaining hot water take-out device for a bathtub described in any one of the preceding items 1 to 3, wherein the first check valve is adjusted to a state where the valve is opened in a small amount in a normal state.

［５］給湯器から吐出された湯水が往き管を通って循環金具の往き側接続口から導入されて浴槽内に吐出されるとともに、浴槽内の湯水が循環金具に吸い込まれて循環金具の戻り側接続口から流出されて戻り管を通って給湯器に吸い込まれるようにした浴槽用給湯システムにおける循環金具と、往き管および戻り管との間に組み付けられる浴槽用残り湯取出アダプタであって、
一端側が循環金具の往き側接続口に連通され、かつ他端側が往き管に連通される吐出管路と、
一端側が循環金具の戻り側接続口に連通され、かつ他端側が戻り管に連通される吸込管路と、
前記吸込管路の途中に設けられ、かつ浴槽内の残り湯を浴槽外に取り出すための残り湯取出管が接続される残り湯取出管接続口と、
前記吸込管路における前記残り湯取出管接続口よりも他端側において、前記吸込管路および前記吐出管路間を連通する合流管路と、
前記合流管路に設けられ、前記吸込管路から前記吐出管路への湯水の流れを許容し、かつその逆方向の流れを制止する第１逆止弁と、
前記吸込管路における前記残り湯取出管接続口および前記合流管路間に設けられ、吸込方向の湯水の流れを許容し、かつその逆方向の流れを制止する第２逆止弁と、
前記残り湯取出管接続口に設けられ、前記吸込管路から残り湯取出管への湯水の流れを許容し、かつその逆方向の流れを制止する第３逆止弁とを備えたことを特徴とする浴槽用残り湯取出アダプタ。 [5] Hot water discharged from the water heater is introduced from the forward connection port of the circulation fitting through the outgoing pipe and discharged into the bathtub, and hot water in the bathtub is sucked into the circulation fitting and returned to the circulation fitting. A recirculating metal fitting in a hot water supply system for a bath tub that is discharged from a side connection port and sucked into a hot water heater through a return pipe, and a remaining hot water take-out adapter for a bathtub assembled between the forward pipe and the return pipe,
A discharge pipe having one end connected to the forward connection port of the circulation fitting and the other end connected to the forward pipe;
A suction pipe having one end connected to the return side connection port of the circulation fitting and the other end connected to the return pipe;
A remaining hot water outlet pipe connection port to which a remaining hot water outlet pipe for taking out the remaining hot water in the bathtub is connected to the outside of the bathtub;
On the other end side of the remaining hot water outlet pipe connection port in the suction pipe, a merging pipe that communicates between the suction pipe and the discharge pipe,
A first check valve provided in the merging pipe, allowing a flow of hot water from the suction pipe to the discharge pipe, and restricting a flow in the reverse direction;
A second check valve that is provided between the remaining hot water outlet pipe connection port and the merging pipe line in the suction pipe line, allows the flow of hot water in the suction direction, and restricts the flow in the reverse direction;
A third check valve provided at the remaining hot water outlet pipe connection port, allowing a flow of hot water from the suction pipe line to the remaining hot water outlet pipe, and restricting the flow in the opposite direction; Remaining hot water outlet adapter for bathtubs.

上記［１］の発明の浴槽用残り湯取出装置によれば、第１〜第３逆止弁は、水圧によって自動的に作動して流路を切り替えることができるため、残り湯を取り出す際には、例えば手動による流路切替操作等を行わずとも、残り湯取出管の端部から吸引するだけで浴槽内の残り湯を取り出すことができて、残り湯の取出作業を簡単に行うことができる。さらに本発明は、電磁弁を用いなくとも良いため、施工に際して面倒な電気工事も不要であり、施工作業を簡単に行うことができる。また本発明においては、湯はり時、追い焚き時等、残り湯取出時以外のときに、残り湯取出管接続口に設けられる第３逆止弁に対し、開弁方向に湯水による水圧が加わらないため、残り湯取出時以外のときに、残り湯取出管に湯水が流入することがなく、湯水が残り湯取出管から漏れ出すような不具合を確実に防止することができる。 According to the remaining hot water takeout device for a bathtub of the invention of the above [1], the first to third check valves can automatically operate by water pressure to switch the flow path. For example, it is possible to take out the remaining hot water in the bathtub simply by suctioning from the end of the remaining hot water discharge pipe without performing manual channel switching operation, etc. it can. Furthermore, since it is not necessary to use a solenoid valve, the present invention does not require troublesome electrical work during construction, and the construction work can be easily performed. In the present invention, the water pressure by the hot water is applied in the valve opening direction with respect to the third check valve provided at the remaining hot water outlet pipe connection port at times other than the time of taking out the remaining hot water, such as at the time of hot water pouring and chasing. Therefore, when the remaining hot water is not taken out, hot water does not flow into the remaining hot water take-out pipe, and it is possible to reliably prevent a problem that hot water leaks out from the remaining hot water take-out pipe.

上記［２］の発明の浴槽用残り湯取出装置によれば、残り湯取出時以外のときには、第３逆止弁が確実に閉じられているため、例えば追い焚き時に、残り湯取出管内のエアーが第３逆止弁を通って吸込管路内に流入することによって、湯水の吸込不良が生じる等の不具合を確実に防止することができる。 According to the bathtub remaining hot water take-out device of the invention of [2], the third check valve is securely closed at times other than when the remaining hot water is taken out. By flowing into the suction pipe through the third check valve, it is possible to reliably prevent problems such as poor suction of hot water.

上記［３］の発明の浴槽用残り湯取出装置によれば、第３逆止弁における入口側流路断面積と出口側流路断面積とが等しくなるため、安定した弁動作を行えるとともに、残り湯を効率良く流通させることができる。 According to the remaining hot water takeout device for bathtubs of the invention of [3] above, the inlet side channel cross-sectional area and the outlet side channel cross-sectional area of the third check valve are equal, so that stable valve operation can be performed, The remaining hot water can be distributed efficiently.

上記［４］の発明の浴槽用残り湯取出装置によれば、浴槽内の水位を検出する水位センサーが給湯器内の吸込口に対応して設置されている場合、浴槽内の水位が低下した際にその水位低下を上記の水位センサーによって精度良く確実に検出することができる。 According to the remaining hot water takeout device for a bathtub of the invention of the above [4], when a water level sensor for detecting the water level in the bathtub is installed corresponding to the suction port in the water heater, the water level in the bathtub is lowered. At that time, the water level drop can be accurately and reliably detected by the water level sensor.

上記［５］の発明の浴槽用残り湯取出アダプタによれば、既設の循環金具に組み付けるだけで簡単に、上記と同様の効果を奏する残り湯取出装置を得ることができる。 According to the bathtub remaining hot water takeout adapter of the invention of [5], it is possible to obtain a remaining hot water takeout device that exhibits the same effect as described above simply by assembling it to an existing circulating metal fitting.

図１はこの発明の実施形態である残り湯取出アダプタが適用された浴槽用給湯システムを示すブロック図である。FIG. 1 is a block diagram showing a hot water supply system for a bathtub to which a remaining hot water takeout adapter according to an embodiment of the present invention is applied. 図２は実施形態の給湯システムにおける残り湯取出アダプタ周辺を示す平面図である。FIG. 2 is a plan view showing the vicinity of the remaining hot water extraction adapter in the hot water supply system of the embodiment. 図３は図２の断面図である。FIG. 3 is a cross-sectional view of FIG. 図４は図２の分解断面図である。4 is an exploded cross-sectional view of FIG. 図５は実施形態の残り湯取出アダプタに採用された第１逆止弁を示す図であって、図（ａ）は断面図、図（ｂ）は弁座周辺を示す正面図である。FIG. 5 is a view showing a first check valve employed in the remaining hot water take-out adapter of the embodiment, wherein FIG. 5 (a) is a sectional view and FIG. 5 (b) is a front view showing the periphery of the valve seat. 図６は実施形態の残り湯取出アダプタに採用された第２逆止弁を示す図であって、図（ａ）は断面図、図（ｂ）は弁座周辺を示す正面図である。FIG. 6 is a view showing a second check valve employed in the remaining hot water take-out adapter of the embodiment, wherein FIG. 6 (a) is a sectional view and FIG. 6 (b) is a front view showing the vicinity of the valve seat. 図７は実施形態の残り湯取出アダプタに採用された第３逆止弁を示す図であって、図（ａ）は閉弁状態での断面図、図（ｂ）は開弁状態での断面図、図（ｃ）は弁支持片周辺を示す正面図、図（ｄ）は図（ｃ）のＸ−Ｘ線断面図である。FIG. 7 is a view showing a third check valve employed in the remaining hot water take-out adapter of the embodiment, in which FIG. (A) is a cross-sectional view in a valve-closed state, and FIG. (B) is a cross-section in a valve-open state. The figure and figure (c) are the front views which show the valve support piece periphery, and figure (d) is a XX line sectional view of figure (c). 図８は実施形態の給湯口アダプタ周辺を湯はり時の状態で示す概略断面図である。FIG. 8 is a schematic cross-sectional view showing the vicinity of the hot water supply adapter of the embodiment in a state of hot water filling. 図９は実施形態の給湯口アダプタ周辺を追い焚き時の状態で示す概略断面図である。FIG. 9 is a schematic cross-sectional view illustrating the vicinity of the hot water supply adapter according to the embodiment in a state of reheating. 図１０は実施形態の給湯口アダプタ周辺を残り湯取出時の状態で示す概略断面図である。FIG. 10 is a schematic cross-sectional view showing the vicinity of the hot water supply adapter according to the embodiment in a state when the remaining hot water is taken out.

図１〜図４はこの発明の実施形態である残り湯取出アダプタＰが適用された浴槽用給湯システムを示す図である。 1-4 is a figure which shows the hot water supply system for bathtubs to which the remaining hot water extraction adapter P which is embodiment of this invention was applied.

これらの図に示すように、本実施形態の浴槽用給湯システムは、浴槽Ｒ１の側壁に貫通状態に取り付けられる循環金具（循環アダプタ）Ｑと、循環金具Ｑに組み付けられる残り湯取出アダプタＰと、残り湯取出アダプタＰに往き管９ａおよび戻り管９ｂを介して接続される室外給湯器Ｒ３とを備えている。さらにこの給湯システムには、残り湯取出アダプタＰから洗濯機Ｒ２が設置される洗面室等にかけて残り湯取出管（お湯取り管）９ｃが敷設されている。そして後に詳述するように、湯はり時には、給湯器Ｒ３から往き管９ａおよび戻り管９ｂの双方に湯水が供給されて、その湯水が残り湯取出アダプタＰおよび循環金具Ｑを通って浴槽Ｒ１内に吐出される。さらに追い焚き時には、浴槽内の湯水が循環金具Ｑから吸い込まれ、その湯水が残り湯取出アダプタＰおよび戻り管９ｂを通って給湯器Ｒ３に戻されるとともに、給湯器Ｒ３から往き管９ａに湯水が供給されて、その湯水が残り湯取出アダプタＰおよび循環金具Ｑを通って浴槽内に吐出される。また残り湯取出時には、浴槽内の湯水が循環金具Ｑから吸い込まれ、その湯水が残り湯取出アダプタＰおよび残り湯取出管９ｃを通って洗面室等の洗濯機Ｒ２（残り湯取出箇所）に供給されるようになっている。 As shown in these figures, the hot water supply system for a bathtub of the present embodiment includes a circulation fitting (circulation adapter) Q attached to the side wall of the bathtub R1 in a penetrating state, a remaining hot water extraction adapter P assembled to the circulation fitting Q, An outdoor water heater R3 connected to the remaining hot water take-out adapter P through an outgoing pipe 9a and a return pipe 9b is provided. Further, in this hot water supply system, a remaining hot water outlet pipe (hot water outlet pipe) 9c is laid from the remaining hot water outlet adapter P to the washroom where the washing machine R2 is installed. As will be described in detail later, when hot water is supplied, hot water is supplied from the water heater R3 to both the outgoing pipe 9a and the return pipe 9b, and the hot water passes through the remaining hot water outlet adapter P and the circulation fitting Q in the bathtub R1. Discharged. Further, when reheating, hot water in the bathtub is sucked from the circulation fitting Q, and the hot water is returned to the hot water supply R3 through the remaining hot water take-out adapter P and the return pipe 9b, and hot water is supplied from the hot water supply R3 to the outgoing pipe 9a. The hot water is supplied and discharged into the bathtub through the remaining hot water extraction adapter P and the circulation fitting Q. When the remaining hot water is taken out, the hot water in the bathtub is sucked from the circulation fitting Q, and the hot water is supplied to the washing machine R2 (remaining hot water outlet location) such as a washroom through the remaining hot water outlet adapter P and the remaining hot water outlet pipe 9c. It has come to be.

図３に示すように、循環金具Ｑは、アダプタ本体８１と、槽外取付具（ボディ）８２とを備え、浴槽Ｒ１の外壁面に沿って配置された槽外取付具８２に対し、アダプタ本体８１が浴槽内側から浴槽壁部を貫通してねじ込まれることによって、浴槽壁部に固定されている。 As shown in FIG. 3, the circulation fitting Q includes an adapter main body 81 and a tank outer attachment (body) 82, and the adapter main body is arranged with respect to the tank outer attachment 82 arranged along the outer wall surface of the bathtub R <b> 1. 81 is penetrated through the bathtub wall part from the bathtub inner side, and is fixed to the bathtub wall part.

アダプタ本体８１には、浴槽内にそれぞれ開口する吐出口（槽内吐出口）８１ａおよび吸込口（槽内吸込口）８１ｂが形成されている。また槽外取付具８２には、両側方に向けて開口する往き側接続口８２ａおよび戻り側接続口８２ｂが形成されている。さらに循環金具Ｑ内には、往き側接続口８２ａおよび槽内吐出口８１ａとを連通する吐出流路８ａと、戻り側接続口８２ｂおよび槽内吸込口８１ｂとを連通する吸込流路８ｂとが形成されている。これにより、往き側接続口８２ａから循環金具Ｑ内に導入された湯水は、吐出流路８ａおよび槽内吐出口８１ａを通って浴槽内に吐出されるとともに、槽内吸込口８１ｂから循環金具Ｑ内に吸い込まれた浴槽内の湯水は、吸込流路８ｂおよび戻り側接続口８２ｂを通って槽外に送り出されるようになっている。 The adapter body 81 is formed with a discharge port (in-vessel discharge port) 81a and a suction port (in-vessel suction port) 81b that open in the bathtub. Further, the outside attachment 82 is formed with a forward connection port 82a and a return connection port 82b that open toward both sides. Further, in the circulation fitting Q, there are a discharge flow path 8a that communicates the forward connection port 82a and the tank discharge port 81a, and a suction flow path 8b that communicates the return connection port 82b and the tank suction port 81b. Is formed. Thereby, hot water introduced into the circulation fitting Q from the forward connection port 82a is discharged into the bathtub through the discharge flow path 8a and the vessel discharge port 81a, and the circulation fitting Q from the vessel suction port 81b. The hot water in the bathtub sucked in is sent out of the tank through the suction flow path 8b and the return side connection port 82b.

図２〜図４に示すように、残り湯取出アダプタＰは、第１〜第３管部材１〜３と、第１〜第３逆止弁４〜６とを備えている。なお本実施形態においては、発明の理解を容易にするため、図２〜図４に向かって左側を「一端側」と称し、右側を「他端側」と称する。 As shown in FIGS. 2 to 4, the remaining hot water removal adapter P includes first to third pipe members 1 to 3 and first to third check valves 4 to 6. In the present embodiment, in order to facilitate understanding of the invention, the left side is referred to as “one end side” and the right side is referred to as “the other end side” in FIGS.

第１管部材１は、主管部１０と、その主管部１０の一端に形成され、かつ主管部１０の管軸に対し直交する内側方向に向けて開口する一端側開口部１１と、主管部１０の他端に形成され、かつ他端方向に向けて開口する他端側開口部１５と、主管部１０の中間に形成され、かつ主管部１０の管軸に対し直交する内側方向に向けて延び同方向に開口する接続管部１３とを備えている。 The first pipe member 1 includes a main pipe part 10, one end side opening part 11 that is formed at one end of the main pipe part 10 and opens in an inner direction perpendicular to the pipe axis of the main pipe part 10, and the main pipe part 10. The other end side opening portion 15 formed at the other end of the main tube portion 10 and opened toward the other end direction is formed in the middle of the main pipe portion 10 and extends in the inner direction perpendicular to the tube axis of the main pipe portion 10. And a connecting pipe portion 13 that opens in the same direction.

第２管部材２は、主管部２０と、その主管部２０の一端に形成され、かつ主管部２０の管軸に対し直交する内側方向に向けて開口する一端側開口部２１と、主管部２０の他端に形成され、かつ他端方向に向けて開口する他端側開口部２５と、主管部２０の中間に形成され、かつ主管部２０の管軸に対し直交する内側方向に向けて延び同方向に開口する接続管部２３とを備えている。 The second pipe member 2 is formed at one end of the main pipe part 20, the one end part of the main pipe part 20, and opens at the one end side opening part 21 that opens toward the inner side perpendicular to the pipe axis of the main pipe part 20, and the main pipe part 20. The other end side opening 25 is formed at the other end of the tube and opens toward the other end, and is formed in the middle of the main pipe portion 20 and extends in the inner direction perpendicular to the tube axis of the main pipe portion 20. And a connecting pipe portion 23 that opens in the same direction.

第３管部材３は、主管部３０と、主管部３０の一端に形成され、かつ主管部３０の管軸に対し直交する外側方向（第１管部材１側の方向）に向けて延び同方向に開口する第１接続管部３１と、主管部３０の一端に形成され、かつ主管部３０の管軸に対し直交する外側方向（第２管部材２側の方向）に向けて延び同方向に開口する第２接続管部３２と、主管部３０の他端に形成され、かつ他端方向に向けて開口する他端側開口部３５とを備えている。 The third pipe member 3 is formed at one end of the main pipe part 30 and the main pipe part 30 and extends in the outer direction (direction on the first pipe member 1 side) orthogonal to the pipe axis of the main pipe part 30 in the same direction. The first connection pipe portion 31 that is open to the main pipe portion 30, and is formed at one end of the main pipe portion 30 and extends in the same direction extending in the outer direction (direction on the second pipe member 2 side) perpendicular to the pipe axis of the main pipe portion 30. A second connecting pipe portion 32 that opens and a second end opening portion 35 that is formed at the other end of the main pipe portion 30 and opens toward the other end are provided.

第１管部材１の接続管部１３が第１逆止弁４を介して第３管部材３の第１接続管部３１に水密状態に外嵌されて連結されるとともに、第１管部材１の一端側開口部１１が循環金具Ｑの往き側接続口８２ａに水密状態に挿入されて連結される。 The connecting pipe portion 13 of the first pipe member 1 is externally fitted and connected to the first connecting pipe portion 31 of the third pipe member 3 via the first check valve 4 in a watertight manner. The one end side opening 11 is inserted into and connected to the forward connection port 82a of the circulation fitting Q in a watertight state.

さらに第２管部材２の接続管部２３が第２逆止弁５を介して第３管部材の第２接続管部３２に水密状態に外嵌されて連結されるとともに、第２管部材２の一端側開口部２１が循環金具Ｑの戻り側接続口８２ｂに水密状態に挿入されて連結される。 Further, the connecting pipe portion 23 of the second pipe member 2 is externally fitted and connected to the second connecting pipe portion 32 of the third pipe member via the second check valve 5 in a watertight manner. The one end side opening 21 is inserted into and connected to the return side connection port 82b of the circulation fitting Q in a watertight state.

さらに後述するように第２管部材２の他端側開口部２５内には、第３逆止弁６が適合状態に収容される。 Further, as will be described later, the third check valve 6 is accommodated in the second end opening 25 of the second pipe member 2 in an adapted state.

これにより残り湯取出アダプタＰが組み立てられると同時に、その残り湯取出アダプタＰが循環金具Ｑに組み付けられて固定される。 As a result, the remaining hot water takeout adapter P is assembled, and at the same time, the remaining hot water takeout adapter P is assembled and fixed to the circulation fitting Q.

なお本実施形態においては、循環金具Ｑの往き側接続口８２ａと、戻り側接続口８２ｂと、残り湯取出アダプタＰにおける第１管部材１の一端側開口部１１と、第２管部材２の一端側開口部２１との各軸心は一致している。さらに第１および第２管部材１，２は、循環金具Ｑに対し、軸心回りに回転自在に連結されている。これにより本実施形態においては、残り湯取出アダプタＰを循環金具Ｑに対し、直線上に配置した状態（図２参照）と、直角に配置した状態（図示省略）との間で回転操作自在に構成されている。 In this embodiment, the forward connection port 82a, the return connection port 82b of the circulation fitting Q, the one end opening 11 of the first pipe member 1 in the remaining hot water outlet adapter P, and the second pipe member 2 Each axis center with the one end side opening part 21 corresponds. Further, the first and second pipe members 1 and 2 are connected to the circulation fitting Q so as to be rotatable around the axis. Accordingly, in the present embodiment, the remaining hot water take-out adapter P can be freely rotated between a state in which the remaining hot water take-out adapter P is arranged in a straight line with respect to the circulation fitting Q (see FIG. 2) and a state in which it is arranged at a right angle (not shown). It is configured.

ここで本実施形態においては図３に示すように、第１管部材１の主管部１０が吐出管路Ａとして構成されている。さらに第２管部材２における一端側開口部２１から、主管部２０の一端側半部、接続管部２３、第３管部材３の第２接続管部３２および主管部３０にかけての部分が吸込管路Ｂとして構成されている。さらに第１管部材１の接続管部１３と第３管部材３の第２接続管部３１とが合流管路Ｃとして構成されている。 Here, in the present embodiment, as shown in FIG. 3, the main pipe portion 10 of the first pipe member 1 is configured as a discharge pipe A. Further, the portion from the one end side opening 21 in the second pipe member 2 to the one end side half of the main pipe portion 20, the connection pipe portion 23, the second connection pipe portion 32 of the third pipe member 3, and the main pipe portion 30 is a suction pipe. It is configured as a path B. Furthermore, the connecting pipe part 13 of the first pipe member 1 and the second connecting pipe part 31 of the third pipe member 3 are configured as a merged pipe line C.

また本実施形態においては、第１管部材１の一端側開口部１１が吐出管路Ａの一端側として構成されるとともに、第１管部材１の他端側開口部１５が吐出管路Ａの他端側として構成されている。また第２管部材２の一端側開口部２１が吸込管路Ｂの一端側として構成されるとともに、第３管部材３の他端側開口部３５が吸込管路Ｂの他端側として構成されている。さらに第２管部材２の他端側開口部２５が残り湯取出管接続口として構成されている。 Moreover, in this embodiment, while the one end side opening part 11 of the 1st pipe member 1 is comprised as one end side of the discharge pipe line A, the other end side opening part 15 of the 1st pipe member 1 is the discharge pipe line A. It is configured as the other end side. The one end side opening 21 of the second pipe member 2 is configured as one end side of the suction pipe B, and the other end side opening 35 of the third pipe member 3 is configured as the other end side of the suction pipe B. ing. Furthermore, the opening 25 on the other end side of the second pipe member 2 is configured as a remaining hot water outlet pipe connection port.

従って本実施形態においては、吸込管路Ｂにおける残り湯取出管接続口２５よりも他端側（給湯器側）において吐出管路Ａおよび吸込管路Ｂ間を連通するように合流管路Ｃが形成されるとともに、その合流管路Ｃ内に第１逆止弁４が配置されている。さらに詳細には、第１逆止弁４は、合流管路Ｃ内における吐出管路Ａとの接続部近傍に配置されている。 Therefore, in the present embodiment, the merging pipe line C is connected so that the discharge pipe line A and the suction pipe line B communicate with each other on the other end side (water heater side) with respect to the remaining hot water outlet pipe connection port 25 in the suction pipe line B. The first check valve 4 is disposed in the merging pipeline C while being formed. More specifically, the first check valve 4 is disposed in the vicinity of the connection portion with the discharge pipe A in the merging pipe C.

また吸込管路Ｂにおける残り湯取出管接続口２５および合流管路Ｃ間に第２逆止弁５が配置されている。さらに詳細には、第２逆止弁５は、吸込管路Ｂ内において、残り湯取出管接続口２５よりも他端側（給湯器側）に配置され、かつ合流管路Ｃとの接続部よりも一端側（浴槽側）に配置されている。 Further, the second check valve 5 is disposed between the remaining hot water outlet pipe connection port 25 and the merging pipe line C in the suction pipe line B. More specifically, the second check valve 5 is disposed in the suction pipe B at the other end side (hot water heater side) of the remaining hot water outlet pipe connection port 25 and connected to the merging pipe line C. It is arrange | positioned rather than the one end side (tub side).

また残り湯取出管接続口２５の周辺には、第３逆止弁６が配置されることとなる。換言すると、第３逆止弁６は、残り湯接続管９ｃが連結される残り湯取出管接続口２５を開閉できる態様に配置されている。 Further, the third check valve 6 is disposed around the remaining hot water outlet pipe connection port 25. In other words, the 3rd non-return valve 6 is arrange | positioned in the aspect which can open and close the remaining hot water extraction pipe connection port 25 with which the remaining hot water connection pipe 9c is connected.

第１逆止弁４は、第３管部材３から第１管部材１側への湯水の流れを許容し、かつその逆方向の湯水の流れを制止する逆止弁、すなわち、吸込管路Ｂから吐出管路Ａへの湯水の流れを許容し、かつその逆方向の流れを制止する逆止弁によって構成されている。 The first check valve 4 is a check valve that allows the flow of hot water from the third pipe member 3 to the first pipe member 1 side and stops the flow of hot water in the opposite direction, that is, the suction pipe B. It is comprised by the non-return valve which accept | permits the flow of the hot water to the discharge pipe line A, and stops the flow of the reverse direction.

図４および図５に示すようにこの第１逆止弁４は、第３管部材３における第１接続管部３１の開口周縁部によって構成される弁座４２と、一端が弁座４２に揺動自在に固定された弁本体４３とを備え、弁本体４３が揺動して弁座４２に着脱することによって、弁座４２の開口部（開閉口）が開閉されるスウィング式の逆止弁によって構成されている。言うまでもなくこの第１逆止弁４は、水圧を操作動力源として作動する自力式の弁である。 As shown in FIGS. 4 and 5, the first check valve 4 includes a valve seat 42 constituted by an opening peripheral edge portion of the first connection pipe portion 31 in the third pipe member 3, and one end swinging to the valve seat 42. And a swing check valve that opens and closes the opening (opening / closing port) of the valve seat 42 when the valve body 43 swings and is attached to and detached from the valve seat 42. It is constituted by. Needless to say, the first check valve 4 is a self-powered valve that operates using water pressure as an operating power source.

またこの第１逆止弁４における弁座４２には、内径方向に突出し、かつ周方向に等間隔おきに配置される複数のリブ４４が形成されている。これにより閉弁方向（逆流方向）に水圧が加わった際に、弁本体４３が弁座４２と共にリブ４４によっても支持されるため、弁本体４３が閉弁状態に確実に保持されるようになっている。 The valve seat 42 of the first check valve 4 is formed with a plurality of ribs 44 protruding in the inner diameter direction and arranged at equal intervals in the circumferential direction. As a result, when water pressure is applied in the valve closing direction (back flow direction), the valve main body 43 is supported by the rib 44 together with the valve seat 42, so that the valve main body 43 is reliably held in the valve closed state. ing.

なお本実施形態において、第１逆止弁４は、図５（ａ）の実線に示す通常状態では、弁本体４３が弁座４２から少し浮き上がって僅かに開弁した状態となっており、後述するように浴槽内の水位の検出を正確に行えるようになっている。また言うまでもなく、第１逆止弁４は逆流方向の水圧が加わった際には確実に閉弁するようになっている。 In the present embodiment, the first check valve 4 is in a state where the valve body 43 is slightly lifted from the valve seat 42 and slightly opened in the normal state shown by the solid line in FIG. As a result, the water level in the bathtub can be accurately detected. Needless to say, the first check valve 4 is surely closed when the water pressure in the reverse flow direction is applied.

第２逆止弁５は、第２管部材２から第３管部材３側への湯水の流れを許容し、かつその逆方向の湯水の流れを制止する逆止弁、すなわち、吸込管路Ｂの吸込方向の湯水の流れを許容し、かつその逆方向の流れを制止する逆止弁によって構成されている。 The second check valve 5 is a check valve that allows the flow of hot water from the second pipe member 2 to the third pipe member 3 side and stops the flow of hot water in the opposite direction, that is, the suction pipe line B. It is constituted by a check valve that allows the flow of hot water in the suction direction and restricts the flow in the opposite direction.

図４および図６に示すようにこの第２逆止弁５は、第２管部材２の接続管部２３内に適合状態に収容される外筒体５１と、外筒体５１における第３管部材３側の端面に設けられた弁座５２と、一端が弁座５２に揺動自在に固定された弁本体５３とを備え、弁本体５３が揺動して弁座５２に着脱することによって、弁座５３の開口部（開閉口）が開閉されるスウィング式の逆止弁によって構成されている。言うまでもなくこの第２逆止弁５も、上記第１逆止弁４と同様、水圧を操作動力源として作動する自力式の弁である。 As shown in FIGS. 4 and 6, the second check valve 5 includes an outer cylinder body 51 accommodated in the connection pipe portion 23 of the second pipe member 2 and a third pipe in the outer cylinder body 51. A valve seat 52 provided on the end face on the member 3 side and a valve main body 53 having one end pivotably fixed to the valve seat 52 are provided. The valve main body 53 swings and is attached to and detached from the valve seat 52. The swing seat is configured by a swing type check valve that opens and closes the opening (opening / closing port) of the valve seat 53. Needless to say, the second check valve 5 is also a self-powered valve that operates using water pressure as an operating power source, like the first check valve 4.

またこの第２逆止弁５においても、上記第１逆止弁４と同様、弁座５２に内径方向に突出し、かつ周方向に等間隔おきに配置される複数のリブ５４が形成されている。これにより閉弁方向（逆流方向）に水圧が加わった際に、弁本体５３が弁座５２と共にリブ５４によっても支持されるため、弁本体５３が閉弁状態に確実に保持されるようになっている。 Also in the second check valve 5, like the first check valve 4, a plurality of ribs 54 are formed on the valve seat 52 so as to protrude in the inner diameter direction and are arranged at equal intervals in the circumferential direction. . As a result, when water pressure is applied in the valve closing direction (back flow direction), the valve main body 53 is supported by the rib 54 together with the valve seat 52, so that the valve main body 53 is reliably held in the valve closed state. ing.

第３逆止弁６は、第２管部材２から他端側開口部（残り湯取出管接続口）２５を介して湯水が流出するのを許容し、かつ残り湯取出管接続口２５から第２管部材２への流入を制止する逆止弁、すなわち吸込管路Ｂから後述の残り湯取出管９ｃへの湯水の流れを許容し、かつその逆方向の流れを制止する逆止弁によって構成されている。 The third check valve 6 allows the hot water to flow out from the second pipe member 2 through the other end side opening (remaining hot water outlet pipe connection port) 25, and from the remaining hot water outlet pipe connection port 25. A check valve for restricting the inflow into the two-pipe member 2, that is, a check valve for allowing hot water to flow from the suction pipe B to the remaining hot water take-out pipe 9c described later and for preventing the reverse flow. Has been.

図４および図７に示すようにこの第３逆止弁６は、第２管部材２における残り湯取出管接続口２５内に適合状態に収容される外筒体６１を備えている。外筒体６１内における一端側（浴槽側）端部には、弁座６２が形成されるとともに、その弁座６２の他端側（洗濯機側）の面である弁座面が略テーパー状に形成されている。 As shown in FIGS. 4 and 7, the third check valve 6 includes an outer cylindrical body 61 that is accommodated in the remaining hot water outlet pipe connection port 25 in the second pipe member 2. A valve seat 62 is formed at one end side (tub side) end portion in the outer cylindrical body 61, and a valve seat surface which is a surface on the other end side (washing machine side) of the valve seat 62 is substantially tapered. Is formed.

また外筒体６１の他端側（洗濯機側）の端部には、その周方向の一部から内径方向に沿って軸心位置まで延びる弁軸支持片６５が形成されている。さらに外筒体６１の内部には、弁本体６３が収容されるとともに、この弁本体６３には軸心方向に沿って延びる弁軸６４が形成されている。この弁軸６４が弁軸支持片６５の先端部にスライド自在に貫通されることにより、弁本体６３が軸心方向にスライド自在に支持されている。これにより図７（ａ）に示すように弁本体６３が一端側にスライド移動した際には、弁本体６３が弁座６２に密着して閉弁状態となり、図７（ｂ）に示すように弁本体６３が他端側にスライド移動した際には、弁本体６３が弁座６２から離間して弁座６２の開口部（開閉口）が開放されて開弁状態となる。 A valve shaft support piece 65 extending from a part in the circumferential direction to the axial center position along the inner diameter direction is formed at the end of the outer cylinder 61 on the other end side (washing machine side). Further, a valve main body 63 is accommodated in the outer cylindrical body 61, and a valve shaft 64 extending along the axial direction is formed in the valve main body 63. The valve body 64 is slidably penetrated through the distal end portion of the valve shaft support piece 65 so that the valve body 63 is supported so as to be slidable in the axial direction. As a result, when the valve body 63 slides to one end as shown in FIG. 7A, the valve body 63 comes into close contact with the valve seat 62 and closes, as shown in FIG. 7B. When the valve main body 63 slides to the other end side, the valve main body 63 is separated from the valve seat 62 and the opening (opening / closing port) of the valve seat 62 is opened to be in the valve open state.

さらに弁本体６３と弁軸支持片６５との間には弁軸６４に外嵌するようにして圧縮コイルバネ６６が介在されている。これにより通常状態において弁本体６３は、バネ６６の付勢力によって弁座６３に押し付けられた状態に保持されている。 Further, a compression coil spring 66 is interposed between the valve body 63 and the valve shaft support piece 65 so as to be fitted on the valve shaft 64. As a result, in the normal state, the valve body 63 is held in a state of being pressed against the valve seat 63 by the biasing force of the spring 66.

この構成においては、図７（ｂ）に示すように第２管部材２内の湯水の水圧によって、弁本体６３がバネ６６の付勢力に抗して他端側に移動して開弁状態となった際には、弁座６２の開閉口６７を通った湯水が、外筒体６１の内周面（流路内周面）と弁本体６３との間の環状流路６８を通って他端側に流動するようになっている。また湯水が逆流しようとした際には、水圧およびバネ６６の付勢力によって弁本体６３が弁座６２に密着することによって閉弁状態となり、湯水の逆流が制止されるようになっている。言うまでもなくこの第３逆止弁６も、上記第１および第２逆止弁４，５と同様、水圧を操作動力源として作動する自力式の弁である。 In this configuration, as shown in FIG. 7B, the valve body 63 moves to the other end side against the urging force of the spring 66 due to the water pressure of the hot water in the second pipe member 2, and the valve is opened. When this happens, the hot water that has passed through the opening / closing port 67 of the valve seat 62 passes through the annular flow path 68 between the inner peripheral surface (flow path inner peripheral surface) of the outer cylinder 61 and the valve body 63, and so on. It flows to the end side. When hot water is about to flow backward, the valve main body 63 comes into close contact with the valve seat 62 by the hydraulic pressure and the biasing force of the spring 66, so that the valve is closed and the hot water is prevented from flowing backward. Needless to say, the third check valve 6 is also a self-acting valve that operates using water pressure as an operating power source, like the first and second check valves 4 and 5.

ここで本実施形態では、第３逆止弁６が開弁した状態において、弁座６２の開閉口６７の開口面積と、弁本体６３外周の環状流路６８の流路断面積とが等しくなるように調整されている。つまり、第３逆止弁６に対し流入する湯水の流量と、流出する湯水の流量とが等しくなるように調整されている。 Here, in the present embodiment, in the state where the third check valve 6 is opened, the opening area of the opening / closing port 67 of the valve seat 62 is equal to the channel cross-sectional area of the annular channel 68 on the outer periphery of the valve body 63. Have been adjusted so that. That is, the flow rate of the hot water flowing into the third check valve 6 is adjusted to be equal to the flow rate of the flowing hot water.

また図７（ｄ）に示すように本実施形態において、弁軸支持片６５における環状流路６８に対応する部分は、湯水の流れを許容する方向（正方向）に対し、上流側が先鋭な矢尻状の断面に形成されている。このため第３逆止弁６を湯水が流通する際に、その湯水に混入した毛髪等のゴミが、弁軸支持片６５に引っ掛かるようなことがなく、目詰まり等の不具合の発生を有効に防止することができる。 As shown in FIG. 7D, in the present embodiment, the portion corresponding to the annular flow path 68 in the valve shaft support piece 65 has a sharp arrowhead on the upstream side with respect to the direction in which the hot water flow is allowed (positive direction). It is formed in a cross section. For this reason, when hot water flows through the third check valve 6, dust such as hair mixed in the hot water does not get caught on the valve shaft support piece 65, and it is possible to effectively generate defects such as clogging. Can be prevented.

以上のように構成された残り湯取出アダプタＰにおいて、図１および図３に示すように第１管部材１の他端側開口部（吐出管路Ａの他端側）１５に往き管９ａの一端側が連結されるとともに、その往き管９ａの他端側が給湯器Ｒ３の吐出口（出湯口）に連結される。さらに第３管部材３の他端側開口部（吸込管路Ｂの他端側）３５に戻り管９ｂの一端側が連結されるとともに、その戻り管９ｂの他端側が給湯器Ｒ３の吸込口（吸引口）に連結される。さらに残り湯取出管９ｃの一端側が第２管部材２の他端側開口部（残り湯取出管接続口）２５に連結され、この残り湯取出管接続口２５が残り湯取出管９ｃを介して洗濯機Ｒ２に連通接続される。 In the remaining hot water take-out adapter P configured as described above, as shown in FIGS. 1 and 3, the forward pipe 9a is connected to the other end side opening (the other end side of the discharge pipe A) 15 of the first pipe member 1. One end side is connected, and the other end side of the forward pipe 9a is connected to a discharge port (outlet port) of the water heater R3. Furthermore, one end side of the return pipe 9b is connected to the other end side opening part (the other end side of the suction pipe B) 35 of the third pipe member 3, and the other end side of the return pipe 9b is connected to the suction port of the water heater R3 ( Connected to the suction port). Furthermore, one end side of the remaining hot water outlet pipe 9c is connected to the other end side opening (remaining hot water outlet pipe connecting port) 25 of the second pipe member 2, and this remaining hot water outlet pipe connecting port 25 is connected via the remaining hot water outlet pipe 9c. It is connected in communication with the washing machine R2.

以上の構成の浴槽用給湯システムにおいて、浴槽Ｒ１にお湯を溜める湯はり処理を行う場合には、給湯器Ｒ３の吐出口および吸込口から往き管９ａおよび戻り管９ｂの双方に湯水が供給される、いわゆるダブル搬送によって行われる。このダブル搬送においては水圧によって図８に示すように第１逆止弁４が開弁状態となり、第２および第３逆止弁５，６が閉弁状態となり、同図の矢符号に示すような湯水の流れが形成される。すなわち図４および図８に示すように往き管９ａに導入された湯水は、残り湯取出アダプタＰの第１管部材１における他端側開口部（吐出管路Ａの他端側）１５から主管部１０（吐出管路Ａ）に導入される。主管部１０に導入された湯水は、残り湯取出アダプタＰの一端側開口部１１、循環金具Ｑの往き側接続口８２ａを通って吐出流路８ａに導入されて、槽内吐出口８１ａを介して浴槽Ｒ１内に供給される。一方、給湯器Ｒ３から戻り管９ｂに導入された湯水は、残り湯取出アダプタＰの第３管部材３における主管部３０の他端側開口部（吸込管路Ｂの他端側）３５から主管部３０（吸込管路Ｂ）に導入される。主管部３０に導入された湯水は、第１接続管部３１、第１逆止弁４、第１管部材１の接続管部１３（合流管路Ｃ）を通って、第１管部材１の主管部１０（吐出管路Ａ）に導入されて、吐出管路Ａ内の湯水と合流する。こうして合流した湯水は、既述した通り主管部１０（吐出管路Ａ）、一端側開口部１１、循環金具Ｑの往き側接続口８２ａを通って吐出流路８ａに導入されて、槽内吐出口８１ａを介して浴槽Ｒ１内に供給される。 In the hot water supply system for a bathtub having the above-described configuration, when performing hot water treatment for accumulating hot water in the bathtub R1, hot water is supplied to both the forward pipe 9a and the return pipe 9b from the discharge port and the suction port of the hot water heater R3. This is performed by so-called double conveyance. In this double conveyance, the first check valve 4 is opened and the second and third check valves 5 and 6 are closed as shown in FIG. 8 due to water pressure. A hot water flow is formed. That is, as shown in FIG. 4 and FIG. 8, the hot water introduced into the forward pipe 9a is connected to the main pipe from the other end opening (the other end side of the discharge pipe A) 15 in the first pipe member 1 of the remaining hot water take-out adapter P. Part 10 (discharge line A) is introduced. The hot water introduced into the main pipe portion 10 is introduced into the discharge flow path 8a through the one end side opening 11 of the remaining hot water take-out adapter P and the forward connection port 82a of the circulation fitting Q, and passes through the in-tank discharge port 81a. Supplied into the bathtub R1. On the other hand, the hot water introduced into the return pipe 9b from the water heater R3 is supplied from the other end opening (the other end side of the suction pipe B) 35 of the main pipe portion 30 in the third pipe member 3 of the remaining hot water take-out adapter P. Part 30 (suction line B) is introduced. Hot water introduced into the main pipe part 30 passes through the first connection pipe part 31, the first check valve 4, the connection pipe part 13 (merging pipe line C) of the first pipe member 1, and passes through the first pipe member 1. It is introduced into the main pipe portion 10 (discharge pipe A) and merges with hot water in the discharge pipe A. The hot and cold water thus joined is introduced into the discharge passage 8a through the main pipe portion 10 (discharge pipe A), the one end side opening portion 11 and the forward connection port 82a of the circulation fitting Q as described above, and discharged into the tank. It is supplied into the bathtub R1 through the outlet 81a.

浴槽Ｒ１内の湯水を再加熱する追い焚き処理を行う場合には、給湯器Ｒ３の吐出口から往き管９ａ内に高温の湯水が導入されるとともに、給湯器Ｒ３の吸込口から戻り管９ｂ内が吸引される。この追い焚き時には水圧によって図９に示すように第２逆止弁５が開弁状態となり、第１および第３逆止弁４，６が閉弁状態となり、同図の矢符号に示すような湯水の流れが形成される。すなわち図４および図９に示すように往き管９ａに導入された湯水は、残り湯取出アダプタＰの第１管部材１における他端側開口部（吐出管路Ａの他端側）１５から主管部１０（吐出管路Ａ）に導入される。主管部１０に導入された湯水は、残り湯取出アダプタＰの一端側開口部１１、循環金具Ｑの往き側接続口８２ａを通って吐出流路８ａに導入されて、槽内吐出口８１ａを介して浴槽Ｒ１内に供給される。一方、給湯器Ｒ３の吸引作用によって、浴槽Ｒ１内の湯水が循環金具Ｑの槽内吸込口８１ｂから吸込流路８ｂ内に吸い込まれて、戻り側接続口８２ｂ、残り湯取出アダプタＰの第２管部材２の一端側開口部２１（吸込管路Ｂの一端側）を通って主管部２０内に吸い込まれる。主管部２０に吸い込まれた湯水は、接続管部２３、第２逆止弁５を通って、第３管部材３の第２接続管部３２に吸い込まれる。第２接続管部３２に吸い込まれた湯水は、主管部３０、他端側開口部３５を通って戻り管９ｂに吸い込まれて、給湯器Ｒ３に戻る。こうして浴槽Ｒ１および給湯器Ｒ３間を湯水が循環するようになっている。 When reheating the hot water in the bathtub R1 is performed, hot hot water is introduced from the discharge port of the water heater R3 into the outgoing pipe 9a, and from the suction port of the water heater R3 to the return pipe 9b. Is sucked. At this time, the second check valve 5 is opened as shown in FIG. 9 by the water pressure, and the first and third check valves 4 and 6 are closed as shown in FIG. A stream of hot water is formed. That is, as shown in FIGS. 4 and 9, the hot water introduced into the forward pipe 9 a is connected to the main pipe from the other end opening (the other end side of the discharge pipe A) 15 in the first pipe member 1 of the remaining hot water take-out adapter P. Part 10 (discharge line A) is introduced. The hot water introduced into the main pipe portion 10 is introduced into the discharge flow path 8a through the one end side opening 11 of the remaining hot water take-out adapter P and the forward connection port 82a of the circulation fitting Q, and passes through the in-tank discharge port 81a. Supplied into the bathtub R1. On the other hand, by the suction action of the water heater R3, the hot water in the bathtub R1 is sucked into the suction flow path 8b from the tank suction port 81b of the circulation fitting Q, and the return side connection port 82b and the second of the remaining hot water takeout adapter P are drawn. The pipe member 2 is sucked into the main pipe portion 20 through the one end side opening 21 (one end side of the suction pipe B). The hot water sucked into the main pipe part 20 passes through the connection pipe part 23 and the second check valve 5 and is sucked into the second connection pipe part 32 of the third pipe member 3. The hot water sucked into the second connecting pipe part 32 is sucked into the return pipe 9b through the main pipe part 30 and the other end side opening part 35 and returns to the water heater R3. Thus, hot water circulates between the bathtub R1 and the water heater R3.

浴槽内の残り湯（湯水）を洗濯水として再利用する残り湯取出処理（お湯取り処理）を行う場合には、給湯器Ｒ３は停止したままの状態で、洗濯機Ｒ２に備えられた吸引ポンプの吸引作用によって残り湯取出管９ｃ内が負圧に設定される。これにより図１０に示すように第３逆止弁６が開弁状態となり、第１および第２逆止弁４，５が閉弁状態となり、同図の矢符号に示すような湯水の流れが形成される。すなわち図４および図１０に示すように浴槽Ｒ１内の湯水（残り湯）が循環金具Ｑの槽内吸込口８１ｂから吸込流路８ｂ内に吸い込まれて、戻り側接続口８２ｂ、残り湯取出アダプタＰの第２管部材２の一端側開口部２１（吸込管路Ｂの一端側）を通って主管部２０内に吸い込まれる。主管部２０に吸い込まれた湯水は、第２管部材２の他端側開口部（残り湯取出管接続口）２５、第３逆止弁６を通って残り湯取出管９ｃ内に吸い込まれ、残り湯取出管９ｃを通って洗濯機Ｒ２に供給（吸引）される。 When performing the remaining hot water removal process (hot water removal process) in which the remaining hot water (hot water) in the bathtub is reused as washing water, the suction pump provided in the washing machine R2 with the water heater R3 stopped. The remaining hot water outlet pipe 9c is set to a negative pressure by the suction action. As a result, as shown in FIG. 10, the third check valve 6 is opened, the first and second check valves 4 and 5 are closed, and the flow of hot water as indicated by the arrow in FIG. It is formed. That is, as shown in FIGS. 4 and 10, hot water (remaining hot water) in the bathtub R1 is sucked into the suction flow path 8b from the tank suction port 81b of the circulation fitting Q, and the return side connection port 82b and the remaining hot water takeout adapter are obtained. The P second pipe member 2 is sucked into the main pipe portion 20 through the one end side opening 21 (one end side of the suction pipe B). The hot water sucked into the main pipe part 20 is sucked into the remaining hot water outlet pipe 9c through the other end side opening (remaining hot water outlet pipe connection port) 25 of the second pipe member 2 and the third check valve 6. It is supplied (sucked) to the washing machine R2 through the remaining hot water discharge pipe 9c.

以上のように本実施形態の浴槽用給湯システムによれば、水圧によって作動する自力式の逆止弁である第１〜第３逆止弁４〜６によって、湯はり時、追い焚き時、残り湯取出時の流路を切り替えるようにしているため、例えば残り湯を取り出す際には、手動による流路切換操作等の面倒な操作を行わずとも、洗濯機Ｒ２の吸引ポンプを作動させるだけで簡単に、浴槽内の残り湯を残り湯取出管９ｃを介して洗濯機Ｒ２に取り込むことができる。 As described above, according to the hot water supply system for a bathtub according to the present embodiment, the first to third check valves 4 to 6, which are self-operated check valves that are operated by water pressure, allow the remaining time when hot water is poured, when reheating is performed. Since the flow path at the time of hot water removal is switched, for example, when removing the remaining hot water, only the suction pump of the washing machine R2 is operated without performing troublesome operations such as manual flow path switching operation. The remaining hot water in the bathtub can be easily taken into the washing machine R2 through the remaining hot water discharge pipe 9c.

さらに流路切替用に水圧作動式の逆止弁４〜６を用いているため、電磁弁を採用する場合と比較して、施工に際して面倒な電気工事が不要であり、施工作業を簡単に行うことができる。さらに本実施形態においては、電磁弁を設置しなくとも良い分、小型化を図ることができるとともに、設置スペースが小さくとも確実に施工することができる。 Furthermore, since the hydraulically operated check valves 4 to 6 are used for switching the flow path, compared to the case of employing a solenoid valve, troublesome electrical work is not required for the construction, and the construction work is easily performed. be able to. Furthermore, in this embodiment, it is possible to reduce the size as much as it is not necessary to install a solenoid valve, and it is possible to perform construction reliably even if the installation space is small.

また湯はり処理や追い焚き処理等、残り湯取出処理以外の時に、残り湯取出管接続口２５の第３逆止弁６に対し、開弁方向に湯水による水圧が加わることがない。例えば図８に示す湯はり時には、第３逆止弁６が配置される第２管部材２の主管部２０を湯水が通過せず、第３逆止弁６に開弁方向に水圧が加わることがない。さらに図９に示す追い焚き時には、第２管部材２の主管部２０は負圧となり、第３逆止弁６に開弁方向の水圧が加わることもない。このため、残り湯取出処理以外の時には、第３逆止弁６が確実に閉弁状態に維持される。従って、残り湯取出時以外に、残り湯取出アダプタＰから残り湯取出管９ｃに湯水が流入することがなく、湯水が洗濯機Ｒ２等に漏れ出すような不具合を確実に防止することができる。 In addition, water pressure by hot water is not applied in the valve opening direction to the third check valve 6 of the remaining hot water outlet pipe connection port 25 at a time other than the remaining hot water outlet processing such as hot water processing or reheating processing. For example, when hot water is shown in FIG. 8, hot water does not pass through the main pipe portion 20 of the second pipe member 2 where the third check valve 6 is disposed, and water pressure is applied to the third check valve 6 in the valve opening direction. There is no. Further, at the time of reheating shown in FIG. 9, the main pipe portion 20 of the second pipe member 2 has a negative pressure, and water pressure in the valve opening direction is not applied to the third check valve 6. For this reason, the third check valve 6 is reliably maintained in the closed state at times other than the remaining hot water removal processing. Accordingly, the hot water does not flow into the remaining hot water outlet pipe 9c from the remaining hot water outlet adapter P except when the remaining hot water is taken out, and it is possible to reliably prevent a problem that the hot water leaks into the washing machine R2 or the like.

また本実施形態の残り湯取出アダプタＰにおいては、吐出管路Ａおよび吸込管路Ｂ間の合流管路Ｃに設けられた第１逆止弁４を、通常状態では少量開弁した状態に設定しているため、フルオートタイプの給湯器を採用している場合、特に有益である。すなわち給湯器Ｒ３として、水位低下時に自動的に足し湯（差し湯）する機能を備えたフルオートタイプの給湯器を採用している場合、水位センサーは通常、給湯器Ｒ３内の吸込口（吸込流路）に対応して設置される。この場合仮に残り湯取出アダプタＰの第１管部材１および第３管部材３間の第１逆止弁４が全閉されていると、浴槽内の水位が低下ししても、第３管部材３内、ひいては給湯器Ｒ３の吸込口の水圧が低下せず、上記水位センサーによって浴槽内の水位低下を検出できないことがある。そうすると、浴槽内の水位が実際に低下しても、足し湯されなくなってしまう。 Further, in the remaining hot water take-out adapter P of the present embodiment, the first check valve 4 provided in the junction pipe C between the discharge pipe A and the suction pipe B is set to a state where a small amount is opened in the normal state. Therefore, it is particularly beneficial when a fully automatic water heater is employed. That is, when a full-automatic water heater having a function of automatically adding hot water (pour hot water) when the water level drops is adopted as the water heater R3, the water level sensor usually has a suction port (suction) in the water heater R3. It is installed corresponding to the flow path). In this case, if the first check valve 4 between the first pipe member 1 and the third pipe member 3 of the remaining hot water take-out adapter P is fully closed, even if the water level in the bathtub drops, the third pipe In some cases, the water pressure in the member 3 and thus the suction port of the water heater R3 does not decrease, and the water level in the bathtub may not be detected by the water level sensor. If it does so, even if the water level in a bathtub actually falls, it will not be added hot water.

そこで本実施形態においては、残り湯取出アダプタＰの第１管部材１および第３管部材３間の第１逆止弁４が通常状態で少量開いているため、浴槽内の水位が低下した際に、その水位低下を、給湯器内の上記水位センサーによって直ちに検出でき、水位低下時に確実に足し湯することができる。 Therefore, in the present embodiment, when the first check valve 4 between the first pipe member 1 and the third pipe member 3 of the remaining hot water take-out adapter P is opened in a small amount in a normal state, the water level in the bathtub is lowered. In addition, the water level drop can be immediately detected by the water level sensor in the water heater, and the hot water can be reliably added when the water level drops.

なお言うまでもなく、第１逆止弁４は追い焚き時等に逆流方向に水圧が加わった場合には、水圧によって全閉されるため、そのような逆流を確実に防止することができる。 Needless to say, since the first check valve 4 is fully closed by the water pressure when the water pressure is applied in the backflow direction at the time of reheating or the like, such a backflow can be reliably prevented.

また本実施形態の残り湯取出アダプタＰにおいては、第２管部材２の残り湯取出管接続口２５に設けられる第３逆止弁６として、バネ式逆止弁によって構成しているため、通常状態では、バネ６６の付勢力によって弁本体６３を弁座６２に密着させることにより、全閉状態に確実に維持されている。このため追い焚き時等において、以下に詳述するように湯水を確実に循環させることができ、エラーの発生を確実に防止することができる。 In the remaining hot water outlet adapter P of the present embodiment, since the third check valve 6 provided in the remaining hot water outlet pipe connection port 25 of the second pipe member 2 is constituted by a spring type check valve, In the state, the valve body 63 is brought into close contact with the valve seat 62 by the urging force of the spring 66, so that the valve body 63 is reliably maintained in the fully closed state. For this reason, hot water can be circulated reliably as described in detail below at the time of rebirth and the like, and the occurrence of errors can be reliably prevented.

すなわち仮に、第３逆止弁６が通常状態で少量開いている場合、残り湯取出管９ｃが湯水が満たされていない空の状態で、追い焚き処理を行って給湯器Ｒ３の吸込口から戻り管９ｂを介して湯水を吸引すると、残り湯取出管９ｃ内のエアーが第３逆止弁６を通って、残り湯取出アダプタＰの吸込管路Ｂに吸引されて戻り管９ｂに吸引されてしまう。そうすると、浴槽内の湯水を十分に吸引できず、吸込流量（循環量）不足となり、給湯器Ｒ３にエラーが発生してしまう。 In other words, if the third check valve 6 is opened in a small amount in the normal state, the remaining hot water discharge pipe 9c is refilled from the suction port of the water heater R3 by performing a reheating process in an empty state where the hot water is not filled. When hot water is sucked through the pipe 9b, the air in the remaining hot water outlet pipe 9c passes through the third check valve 6 and is sucked into the suction pipe B of the remaining hot water outlet adapter P and sucked into the return pipe 9b. End up. If it does so, the hot water in a bathtub cannot fully be attracted | sucked, suction flow (circulation amount) becomes insufficient, and an error will generate | occur | produce in water heater R3.

そこで本実施形態においては、第３逆止弁６としてバネ式逆止弁を用いて、通常状態では全閉状態に維持されるようにしているため、追い焚き時に残り湯取出管９ｃ内のエアーが残り湯取出アダプタＰの吸込管路Ｂに吸引されることはなく、浴槽内の湯水を、循環金具Ｑの吸込流路８ａ、残り湯取出アダプタＰの吸込管路Ｂおよび戻り管９ｂを介して給湯器Ｒ３内に確実に吸引することができる。従って、湯水の循環を確実に行うことができ、給湯器Ｒ３に吸込不良によるエラーが発生するような不具合を確実に防止することができる。 Therefore, in the present embodiment, a spring check valve is used as the third check valve 6 so that the valve is maintained in the fully closed state in the normal state. Is not sucked into the suction pipe B of the remaining hot water take-out adapter P, and hot water in the bathtub is passed through the suction flow path 8a of the circulation fitting Q, the suction pipe B of the remaining hot water take-out adapter P, and the return pipe 9b. Thus, it can be reliably sucked into the water heater R3. Therefore, it is possible to reliably circulate hot water and to reliably prevent a problem that an error due to poor suction occurs in the water heater R3.

また図７（ｂ）に示すように本実施形態の残り湯取出アダプタＰでは、第３逆止弁６における弁座６２の開閉口６７の開口面積（入口側流路断面積）と、開弁状態の弁本体６３および外筒体６１間の環状流路６８の流路断面積（出口側流路断面積）とをほぼ等しくなるように調整しているため、弁本体６３を正確に作動できて、残り湯を残り湯取出管９ｃに効率良くスムーズに吸引することができる。すなわち、洗濯機Ｒ２等に備えられる吸引ポンプは一般的に吸引力が小さいため、第３逆止弁６の出口側流路断面積が入口側流路断面積に対し極端に大きい場合には、吸引時に弁本体６３に十分な吸引力を作用させることができず、弁本体６３を開くことができないおそれがあり、好ましくない。そればかりか、入口側流路断面積が小さいため、残り湯の流量を十分に確保できなくなってしまい、好ましくない。また第３逆止弁６の出口側流路断面積が極端に小さい場合には、残り湯の流量を十分に確保できず、好ましくない。従って既述した通り、第３逆止弁６の出口側流路断面積と入口側流路断面積とはほぼ等しく調整するのが好ましい。 Further, as shown in FIG. 7B, in the remaining hot water outlet adapter P of the present embodiment, the opening area (inlet side channel cross-sectional area) of the valve seat 62 of the third check valve 6 and the valve opening Since the flow passage cross-sectional area (outlet-side flow passage cross-sectional area) of the annular flow passage 68 between the valve body 63 and the outer cylinder 61 in the state is adjusted to be substantially equal, the valve main body 63 can be operated accurately. Thus, the remaining hot water can be efficiently and smoothly sucked into the remaining hot water discharge pipe 9c. That is, since the suction pump provided in the washing machine R2 or the like generally has a small suction force, when the outlet side channel cross-sectional area of the third check valve 6 is extremely larger than the inlet side channel cross-sectional area, A sufficient suction force cannot be applied to the valve body 63 during suction, and the valve body 63 cannot be opened, which is not preferable. In addition, since the inlet-side channel cross-sectional area is small, it is not preferable because a sufficient flow rate of the remaining hot water cannot be secured. In addition, when the outlet side flow passage cross-sectional area of the third check valve 6 is extremely small, it is not preferable because a sufficient flow rate of the remaining hot water cannot be secured. Therefore, as described above, it is preferable to adjust the outlet side channel cross-sectional area of the third check valve 6 and the inlet side channel cross-sectional area to be approximately equal.

また本実施形態の残り湯取出アダプタＰにおいて、第３逆止弁６の弁本体６３の弁軸６４を、外筒体６１の周方向の一点から内径方向に延びる１本の弁軸支持片６５によって支持するようにしているため、残り湯取出時に湯水に混入する毛髪等のゴミが、弁軸支持片６５に引っ掛かるのを有効に防止することができる。このためゴミが弁軸支持片６５に引っ掛かって第３逆止弁６に目詰まりが生じるのを防止でき、目詰まりによる閉弁不良が発生するのを防止することができ、長期間安定した弁動作を維持することができる。 In the remaining hot water take-out adapter P of the present embodiment, the valve shaft 64 of the valve main body 63 of the third check valve 6 is provided with one valve shaft support piece 65 extending in the inner diameter direction from one circumferential point of the outer cylinder 61. Therefore, it is possible to effectively prevent dust such as hair mixed in the hot water when the remaining hot water is taken out from being caught on the valve shaft support piece 65. For this reason, it is possible to prevent dust from being caught on the valve shaft support piece 65 and clogging the third check valve 6, prevent a valve closing failure due to clogging, and prevent the valve from being stable for a long time. The operation can be maintained.

その上さらに図７（ｄ）に示すように本実施形態の第３逆止弁６では、弁軸支持片６５における環状流路６８に対応する部分の断面形状が、上流側が先鋭な矢尻状に形成しているため、この点においても、弁軸支持片６５にゴミが引っ掛かるのを防止でき、目詰まりによる閉弁不良等が発生するのをより一層確実に防止することができる。 In addition, as shown in FIG. 7D, in the third check valve 6 of the present embodiment, the cross-sectional shape of the portion corresponding to the annular flow path 68 in the valve shaft support piece 65 has a sharp arrowhead shape on the upstream side. Because of this, also in this respect, it is possible to prevent dust from being caught on the valve shaft support piece 65, and to more reliably prevent the occurrence of valve closing failure due to clogging.

また本実施形態の残り湯取出アダプタＰにおいて、第１および第２逆止弁４，５における弁座４２，５２には、内径方向に突出する複数のリブ４４，５４を形成して、閉弁方向（逆流方向）の水圧が加わった際に、弁本体４３，５３が弁座４２，５２と共にリブ４４，５４によっても支持されるようにしているため、弁本体４３，５３が閉弁状態に確実に保持される。このため、逆流方向に多大な水圧が発生してとしても、弁本体４３，５３が不用意に撓んで水漏れが生じるような不具合を確実に防止することができる。さらにリブ４４，５４は、先端がフリーな片持ち構造であるため、リブ４４，５４に毛髪等のゴミが引っ掛かり難くなっている。従ってこの点においても、目詰まりによる閉弁不良等が発生するのを防止することができ、長期間安定した弁動作を維持することができる。 Further, in the remaining hot water takeout adapter P of the present embodiment, the valve seats 42 and 52 in the first and second check valves 4 and 5 are formed with a plurality of ribs 44 and 54 protruding in the inner diameter direction to close the valve. When the water pressure in the direction (back flow direction) is applied, the valve main bodies 43 and 53 are supported by the ribs 44 and 54 together with the valve seats 42 and 52, so that the valve main bodies 43 and 53 are closed. Holds securely. For this reason, even if a great amount of water pressure is generated in the reverse flow direction, it is possible to reliably prevent a problem that the valve main bodies 43 and 53 are bent inadvertently to cause water leakage. Further, since the ribs 44 and 54 have a cantilever structure with free ends, dust such as hair is hardly caught on the ribs 44 and 54. Therefore, also in this respect, it is possible to prevent the occurrence of valve closing failure due to clogging, and to maintain stable valve operation for a long time.

なお、上記実施形態においては、浴槽内の残り湯を洗濯水として利用する場合を例に挙げて説明したが、それだけに限られず、本発明においては、残り湯を洗濯水以外の水として利用するようにしても良い。例えば浴槽内の残り湯を、水撒き用の水、水拭き用の水、トイレ洗浄用の水、植物への水遣り用の水等として理由するようにしても良い。 In the above embodiment, the case where the remaining hot water in the bathtub is used as washing water has been described as an example. However, the present invention is not limited thereto, and in the present invention, the remaining hot water is used as water other than washing water. Anyway. For example, the remaining hot water in the bathtub may be used as watering water, water for wiping, water for toilet cleaning, water for watering plants, and the like.

また上記実施形態においては、本発明の残り湯取出アダプタＰを循環金具Ｑに組み付けるように構成しているが、それだけに限られず、残り湯取出アダプタが循環金具に一体に組み込まれたもの、例えば本発明の残り湯取出装置の機能が組み込まれた循環金具を採用するようにしても良い。 Moreover, in the said embodiment, although it comprises so that the remaining hot water extraction adapter P of this invention may be assembled | attached to the circulation metal fitting Q, it is not restricted to it, For example, the thing in which the remaining hot water extraction adapter was integrated in the circulation metal fitting, for example this You may make it employ | adopt the circulation metal fitting in which the function of the remaining hot water taking-out apparatus of invention was integrated.

また上記実施形態においては、湯はり時に往き管および戻り管の双方で湯水を浴槽に供給するようにしたダブル搬送式の給湯器に、本発明の残り湯取出装置を適用した場合を例に挙げて説明したが、それだけに限られず、本発明は、湯はり時に往き管だけで湯水を浴槽に供給するようにしたシングル搬送式の給湯器に適用するようにしても良い。 Moreover, in the said embodiment, the case where the remaining hot water taking-out apparatus of this invention is applied to a double conveyance type water heater which was made to supply hot water to a bathtub with both an outward pipe and a return pipe at the time of hot water is mentioned as an example. However, the present invention is not limited to this, and the present invention may be applied to a single-conveying water heater in which hot water is supplied to a bathtub only by an outward pipe when hot water is poured.

また本発明において、循環金具は、必ずしも金属製品によって構成する必要はなく、一部または全部がプラスチックの成形品によって構成するようにしても良い。 In the present invention, the circulating metal fitting does not necessarily need to be made of a metal product, and a part or all of it may be made of a plastic molded product.

この発明の浴槽用残り湯取出装置は、浴槽内の残り湯を洗濯水等として利用する際の残り湯利用設備に適用することができる。 The remaining hot water take-out device for a bathtub of the present invention can be applied to the remaining hot water use facility when the remaining hot water in the bathtub is used as washing water or the like.

１１：一端側開口部（吐出管路の一端側）
１５：他端側開口部（吐出管路の他端側）
２１：一端側開口部（吸込管路の一端側）
２５：他端側開口部（残り湯取出接続口）
３５：他端側開口部（吸込管路の他端側）
４：第１逆止弁
５：第２逆止弁
６：第３逆止弁
６２：弁座
６３：弁本体
６６：バネ
６７：開閉口
６８：環状流路
８１ａ：槽内吐出口
８１ｂ：槽内吸込口
８２ａ：往き側接続口
８２ｂ：戻り側接続口
９ａ：往き管
９ｂ：戻り管
９ｃ：残り湯取出管
Ａ：吐出管路
Ｂ：吸込管路
Ｃ：合流管路
Ｐ：残り湯取出アダプタ
Ｑ：循環金具
Ｒ１：浴槽
Ｒ２：洗濯機（残り湯取出部）
Ｒ３：給湯器 11: One end side opening (one end side of the discharge pipe)
15: Opening at the other end (the other end of the discharge pipe)
21: Opening at one end (one end of suction pipe)
25: Opening at the other end (remaining hot water outlet connection port)
35: Opening at the other end (the other end of the suction pipe)
4: First check valve 5: Second check valve 6: Third check valve 62: Valve seat 63: Valve body 66: Spring 67: Opening / closing port 68: Annular flow path 81a: In-tank discharge port 81b: Tank Inner suction port 82a: Outlet side connection port 82b: Return side connection port 9a: Outward tube 9b: Return tube 9c: Remaining hot water outlet tube A: Discharge pipe B: Suction pipe C: Confluence pipe P: Remaining hot water outlet adapter Q: Circulation bracket R1: Bathtub R2: Washing machine (remaining hot water outlet)
R3: Water heater

Claims

一端側が浴槽内に開口する槽内吐出口に連通し、かつ他端側が給湯器の吐出口に連通する吐出管路と、一端側が浴槽内に開口する槽内吸込口に連通し、かつ他端側が給湯器の吸込口に連通する吸込管路と、前記吸込管路の途中に設けられた残り湯取出管接続口とを備え、前記残り湯取出管接続口に接続される残り湯取出管を介して浴槽内の湯水が浴槽外に取り出されるようにした浴槽用残り湯取出装置であって、
前記吸込管路における前記残り湯取出管接続口よりも他端側において、前記吐出管路および前記吸込管路間を連通する合流管路と、
前記合流管路に設けられ、前記吸込管路から前記吐出管路への湯水の流れを許容し、かつその逆方向の流れを制止する第１逆止弁と、
前記吸込管路における前記残り湯取出管接続口および前記合流管路間に設けられ、吸込方向の湯水の流れを許容し、かつその逆方向の流れを制止する第２逆止弁と、
前記残り湯取出管接続口に設けられ、前記吸込管路から残り湯取出管への湯水の流れを許容し、かつその逆方向の流れを制止する第３逆止弁とを備えたことを特徴とする浴槽用残り湯取出装置。 One end side communicates with the discharge port in the tank that opens into the bathtub, and the other end communicates with the discharge port of the water heater, and the other end communicates with the suction port in the tank that opens into the bathtub, and the other end. A remaining hot water outlet pipe connected to the remaining hot water outlet pipe connecting port, and a suction pipe line connected to the inlet of the hot water heater, and a remaining hot water outlet pipe connecting port provided in the middle of the suction pipe A hot water removal device for a bathtub that allows hot water in the bathtub to be taken out of the bathtub,
On the other end side of the remaining hot water outlet pipe connection port in the suction pipe, a merging pipe communicating between the discharge pipe and the suction pipe,
A first check valve provided in the merging pipe, allowing a flow of hot water from the suction pipe to the discharge pipe, and restricting a flow in the reverse direction;
A second check valve that is provided between the remaining hot water outlet pipe connection port and the merging pipe line in the suction pipe line, allows the flow of hot water in the suction direction, and restricts the flow in the reverse direction;
A third check valve provided at the remaining hot water outlet pipe connection port, allowing a flow of hot water from the suction pipe line to the remaining hot water outlet pipe, and restricting the flow in the opposite direction; The remaining hot water take-out device for the bathtub.

前記第３逆止弁は、通常状態ではバネの付勢力によって弁本体が弁座に密着して閉弁状態に保持されるバネ式逆止弁によって構成されている請求項１に記載の浴槽用残り湯取出装置。 2. The bathtub check valve according to claim 1, wherein the third check valve is configured by a spring check valve in which a valve main body is brought into close contact with a valve seat and held in a closed state by a biasing force of a spring in a normal state. Remaining hot water removal device.

前記第３逆止弁は、リング状弁座に対し弁本体が軸心方向に沿って接離移動することによって開閉されるように構成されるとともに、その開弁状態では前記弁座の開閉口を通過した湯水が前記弁本体および流路内周面間の環状流路を通過するよう構成され、
前記第３逆止弁が開弁した状態では、前記弁座の開閉口における開口面積と、前記環状流路の流路断面積とがほぼ等しくなるように調整されている請求項１または２に記載の浴槽用残り湯取出装置。 The third check valve is configured to be opened and closed by moving the valve main body toward and away from the ring-shaped valve seat along the axial direction, and in the opened state, the valve seat opening and closing port The hot and cold water passing through the valve body is configured to pass through an annular flow path between the valve body and the flow path inner peripheral surface,
In the state which the said 3rd non-return valve opened, it adjusted so that the opening area in the opening-and-closing port of the said valve seat and the flow-path cross-sectional area of the said annular flow path may become substantially equal. The remaining hot water take-out device for a bathtub described.

前記第１逆止弁は、通常状態では少量開弁した状態に調整されている請求項１〜３のいずれか１項に記載の浴槽用残り湯取出装置。 The said 1st non-return valve is the remaining hot water taking-out apparatus for bathtubs of any one of Claims 1-3 adjusted to the state opened small amount in the normal state.

給湯器から吐出された湯水が往き管を通って循環金具の往き側接続口から導入されて浴槽内に吐出されるとともに、浴槽内の湯水が循環金具に吸い込まれて循環金具の戻り側接続口から流出されて戻り管を通って給湯器に吸い込まれるようにした浴槽用給湯システムにおける循環金具と、往き管および戻り管との間に組み付けられる浴槽用残り湯取出アダプタであって、
一端側が循環金具の往き側接続口に連通され、かつ他端側が往き管に連通される吐出管路と、
一端側が循環金具の戻り側接続口に連通され、かつ他端側が戻り管に連通される吸込管路と、
前記吸込管路の途中に設けられ、かつ浴槽内の残り湯を浴槽外に取り出すための残り湯取出管が接続される残り湯取出管接続口と、
前記吸込管路における前記残り湯取出管接続口よりも他端側において、前記吸込管路および前記吐出管路間を連通する合流管路と、
前記合流管路に設けられ、前記吸込管路から前記吐出管路への湯水の流れを許容し、かつその逆方向の流れを制止する第１逆止弁と、
前記吸込管路における前記残り湯取出管接続口および前記合流管路間に設けられ、吸込方向の湯水の流れを許容し、かつその逆方向の流れを制止する第２逆止弁と、
前記残り湯取出管接続口に設けられ、前記吸込管路から残り湯取出管への湯水の流れを許容し、かつその逆方向の流れを制止する第３逆止弁とを備えたことを特徴とする浴槽用残り湯取出アダプタ。
Hot water discharged from the water heater is introduced from the forward connection port of the circulation fitting through the forward pipe and discharged into the bathtub, and the hot water in the bathtub is sucked into the circulation fitting and the return connection port of the circulation fitting A remaining hot water takeout adapter for a bathtub that is assembled between a circulation fitting in a hot water supply system for a bathtub that is discharged from a return pipe and sucked into a hot water heater, and an outgoing pipe and a return pipe,
A discharge pipe having one end connected to the forward connection port of the circulation fitting and the other end connected to the forward pipe;
A suction pipe having one end connected to the return side connection port of the circulation fitting and the other end connected to the return pipe;
A remaining hot water outlet pipe connection port to which a remaining hot water outlet pipe for taking out the remaining hot water in the bathtub is connected to the outside of the bathtub;
On the other end side of the remaining hot water outlet pipe connection port in the suction pipe, a merging pipe that communicates between the suction pipe and the discharge pipe,
A first check valve provided in the merging pipe, allowing a flow of hot water from the suction pipe to the discharge pipe, and restricting a flow in the reverse direction;
A second check valve that is provided between the remaining hot water outlet pipe connection port and the merging pipe line in the suction pipe line, allows the flow of hot water in the suction direction, and restricts the flow in the reverse direction;
A third check valve provided at the remaining hot water outlet pipe connection port, allowing a flow of hot water from the suction pipe line to the remaining hot water outlet pipe, and restricting the flow in the opposite direction; Remaining hot water outlet adapter for bathtubs.