JPH051746Y2 - - Google Patents

Description

【考案の詳細な説明】 （産業上の利用分野） 本考案は、湯水混合栓、特にウオーターハンマ
ー防止機構を備えた湯水混合栓に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hot and cold water mixing faucet, and particularly to a hot and cold water mixing faucet equipped with a water hammer prevention mechanism.

（従来の技術） 従来、ウオーターハンマー防止機構を備えた湯
水混合栓として第５図に示す構造のもの（本願と
同一出願人の出願にかかる特願昭61−243539号）
がある。(Prior Art) Conventionally, a hot water/cold water mixing faucet equipped with a water hammer prevention mechanism has the structure shown in FIG.
There is.

第５図のものは、湯水混合栓本体Ａの湯流路１
と混合水流路２、水流路３と混合水流路２を区画
する隔壁部分４に夫々湯流路１側、水流路３側を
１次側とする逃し弁座５及び逃し弁孔６を設け、
各逃し弁座５の１次側にはバネ７により常時逃し
弁座５側に付勢されると共に１次側内の圧力を受
けて該圧力が上記バネ７のバネ力を越えると逃し
弁座から遠ざかるように作動するピストン８と、
該ピストン８と一体的に進退して逃し弁座５に接
離する逃し弁体９を配備することにより、開閉弁
の急閉などのため湯流路１内、水流路３内の圧力
が急激に上昇したとき、その上昇圧力により逃し
弁ｅを開き、上昇圧力を混合水流路２に放出して
ウオーターハンマーを防止するものである。 The one in Figure 5 shows the hot water flow path 1 of the hot water mixing faucet main body A.
A relief valve seat 5 and a relief valve hole 6 are provided in the partition wall portion 4 that partitions the mixed water flow path 2 and the water flow path 3 and the mixed water flow path 2, with the hot water flow path 1 side and the water flow path 3 side being primary sides, respectively,
The primary side of each relief valve seat 5 is always biased toward the relief valve seat 5 side by a spring 7, and when it receives pressure inside the primary side and the pressure exceeds the spring force of the spring 7, the relief valve seat a piston 8 that operates to move away from the
By providing a relief valve body 9 that advances and retreats integrally with the piston 8 and approaches and separates from the relief valve seat 5, the pressure in the hot water flow path 1 and the water flow path 3 is prevented from rapidly increasing due to sudden closing of the on-off valve. When the pressure rises to 1, the relief valve e is opened by the rising pressure, and the rising pressure is released into the mixed water flow path 2 to prevent water hammer.

一方、湯水混合栓の湯流路、水流路には夫々開
閉弁の上流側に逆止弁を設けてあるが、逆止弁は
湯側のみ吐出時、隔壁を介して伝わる湯側の熱に
より水側の開閉弁と逆止弁の間の密閉空間内の水
が熱膨張し、該空間内の圧力が上昇するのを防止
するために、弁座をスライド自在な構造とし、こ
の弁座のスライドにより密閉空間を拡張させて上
昇圧力を吸収できるようにしている。 On the other hand, the hot water flow path and the water flow path of a hot water mixing faucet are each equipped with a check valve on the upstream side of the on-off valve, but when only the hot water side is discharged, the check valve is activated by the heat from the hot water side transmitted through the partition wall. In order to prevent the water in the sealed space between the water side on-off valve and the check valve from thermally expanding and the pressure in the space to increase, the valve seat is designed to be slidable. The slide expands the sealed space to absorb rising pressure.

然る処、前述した第５図のウオーターハンマー
防止機構を設けた湯水混合栓において、逆止弁の
弁座がスライド自在な構造であると、給湯源を同
じくして複数の湯水混合栓を設置した場合、１つ
の湯水混合栓の使用により、他の使用しない湯水
混合栓の湯流路側のウオーターハンマー防止機構
が作動し、使用しない湯水混合栓の吐出口から水
が洩出し、故障と間違われる恐れがある。 However, if the check valve seat of the hot water mixer faucet equipped with the water hammer prevention mechanism shown in Fig. 5 is designed to be slidable, it is possible to install multiple hot water mixer faucets using the same hot water source. In this case, when one hot water mixer faucet is used, the water hammer prevention mechanism on the hot water flow path side of the other unused hot water mixer faucet is activated, causing water to leak from the outlet of the unused hot water mixer faucet, which can be mistaken for a malfunction. There is a fear.

即ち、一般に湯は絞りや湯沸器を経由するた
め、このようなものを経由しない水側に比べて動
水圧力が低くなるが、給湯を停止しているときの
静水圧は水側と同じになつている。 In other words, since hot water generally passes through a throttle or water heater, the dynamic water pressure is lower than on the water side that does not pass through such a device, but when hot water supply is stopped, the hydrostatic pressure is the same as on the water side. It's getting old.

そこで、給湯源を同じくする複数の湯水混合栓
のいずれかから給湯を行うと、給湯管路内の圧力
が低下して水側の圧力より低くなるので、他の使
用されない湯水混合栓の湯流路においては今まで
水側の圧力と同じ圧力でバランスしていた逆止弁
の１次側と２次側のバランスが崩れ、２次側に対
して１次側の圧力が低くなり、逆止弁の弁座は再
び２次側の圧力が１次側の圧力にバランスする位
置まで１次側へスライド移動する。 Therefore, if hot water is supplied from one of the multiple hot and cold water mixing faucets that use the same hot water source, the pressure in the hot water supply pipe will drop and become lower than the pressure on the water side, so the hot water flow from the other unused hot and cold water mixing faucets will decrease. In the case of roads, the balance between the primary and secondary sides of check valves, which used to be balanced at the same pressure as the water side, is disrupted, and the pressure on the primary side becomes lower than the secondary side, causing the check valve to become unbalanced. The valve seat of the valve again slides toward the primary side until the pressure on the secondary side is balanced with the pressure on the primary side.

次に使用していた湯水混合栓の給湯を停止する
と、湯側管路内の圧力は再び水側と同じ圧力まで
上昇復帰するので、使用されなかつた湯水混合栓
において１次側へスライドしていた逆止弁座が２
次側へ移動し、２次側の圧力は上昇する。 Next, when you stop the hot water supply from the hot water mixing faucet that was being used, the pressure in the hot water side pipe will rise and return to the same pressure as the water side, so the hot water mixing faucet that was not used will slide toward the primary side. The check valve seat is 2
It moves to the next side, and the pressure on the secondary side increases.

従つて、この圧力上昇により使用しなかつたに
もかかわらず湯側のウオーターハンマー防止機構
が作動してそのピストン、逃し弁体が開弁方向に
移動し、湯流路の逆止弁、２次側の水が混合水流
路を介して吐出口から流出する。 Therefore, due to this pressure increase, the water hammer prevention mechanism on the hot water side operates even though it is not in use, and its piston and relief valve body move in the valve opening direction, causing the check valve in the hot water flow path and the secondary The side water flows out from the outlet via the mixed water channel.

（考案が解決しようとする問題点） 湯流路及び水流路に流路内の圧力が急上昇する
と作動してその上昇圧力を混合水流路へ逃すこと
により、ウオーターハンマーを防止するウオータ
ーハンマー防止機構を備える湯水混合栓におい
て、給湯源を同じくする他の湯水混合栓の使用に
伴つて生ずる湯側の圧力変動による湯側逆止弁の
弁座の移動を、湯側のみの使用による水側の熱膨
張に伴う上昇圧力を水側逆止弁の弁座の１次側へ
のスライドにより吸収する機能を損なうことなく
防止することである。(Problem to be solved by the invention) A water hammer prevention mechanism is provided in the hot water flow path and the water flow path to prevent water hammer by activating when the pressure in the flow path suddenly increases and releasing the increased pressure to the mixed water flow path. In the hot water mixer faucet provided, the movement of the valve seat of the hot water side check valve due to the pressure fluctuation on the hot water side that occurs due to the use of other hot water mixer faucets that use the same hot water source is The purpose is to prevent the rising pressure caused by expansion by sliding the valve seat of the water side check valve toward the primary side without impairing the function of absorbing it.

（問題点を解決するための手段） 上記問題点を解決するために本考案が講ずる技
術的手段は、湯水混合栓本体の湯流路と、混合水
流路、水流路と混合水流路を区画する隔壁部分
に、夫々湯流路側、水流路側を１次側とする逃し
弁座及び逃し弁孔を設け、各逃し弁座の１次側に
はバネにより常時逃し弁座側に付勢されると共に
１次側の圧力を受けて該圧力が上記バネのバネ力
を越えると逃し弁座から遠ざかるように作動する
ピストンと、該ピストンに連係して進退して逃し
弁座に接離する逃し弁体を配備する湯水混合栓に
おいて、湯流路には弁座部材を湯流路に固定した
逆止弁を、水流路には弁座部材を水流路壁面に対
して摺動自在に配備し、該弁座部材をバネにより
二次側へ付勢した逆止弁を、夫々上記逃し弁座よ
り上流側に設けるものである。(Means for solving the problem) The technical means taken by the present invention to solve the above problem is to partition the hot water flow path and the mixed water flow path of the hot water mixer faucet body, and the water flow path and the mixed water flow path. A relief valve seat and a relief valve hole are provided in the partition wall portion, with the hot water flow path side and the water flow path side being the primary side, respectively, and the primary side of each relief valve seat is always biased toward the relief valve seat side by a spring. A piston that receives pressure on the primary side and moves away from the relief valve seat when the pressure exceeds the spring force of the spring, and a relief valve body that moves back and forth in conjunction with the piston to approach and separate from the relief valve seat. In a hot water mixing faucet equipped with a water flow path, a check valve with a valve seat member fixed to the hot water flow path is provided in the hot water flow path, and a valve seat member is provided in the water flow path so as to be slidable against the water flow path wall surface. A check valve whose valve seat member is biased toward the secondary side by a spring is provided upstream of the relief valve seat.

（作用） 而して、本考案の上記技術的手段によれば、湯
側の逆止弁は弁座が湯流路に固定されているの
で、湯側に圧力変動が生じても弁座の移動がな
く、水側の逆止弁は弁座が水流路の壁面に対して
摺動自在で、かつバネにより２次側に付勢されて
いるので、２次側にバネ力以上の圧力上昇がある
と弁座が１次側へスライドする。(Function) According to the above technical means of the present invention, the valve seat of the check valve on the hot water side is fixed to the hot water flow path, so even if pressure fluctuations occur on the hot water side, the valve seat remains unchanged. There is no movement, and the valve seat of the check valve on the water side can freely slide against the wall of the water flow path, and is biased toward the secondary side by a spring, so there is no pressure increase on the secondary side that exceeds the spring force. If there is, the valve seat will slide toward the primary side.

（実施例） 以下、本考案の一実施例を図に基づいて説明す
る。(Example) Hereinafter, an example of the present invention will be described based on the drawings.

図中Ａは湯水混合栓本体で、開閉弁ｃの弁要素
が湯流路１に連絡する湯用弁孔１３、水流路３に
連絡する水用弁孔１４及び混合水流路２に連絡す
る混合水流出孔１５を穿設した固定デイスク１６
と、この固定デイスク１６に摺動自在に重ね合わ
せられ、湯用弁孔１３と水用弁孔１４の双方又は
一方を混合水流出孔１５に連絡する通路１６を有
する可動デイスク１７とで構成され、レバーハン
ドル１８を操作して可動デイスク１７を固定デイ
スク１６上で摺動させ、湯流路１、水流路３から
混合水流路２への湯、水の流動を開始、停止させ
ると共に湯と水の混合水流路２への流入割合を調
節するようになつている。 In the figure, A is the hot water mixing faucet main body, in which the valve element of the on-off valve c is a hot water valve hole 13 that communicates with the hot water flow path 1, a water valve hole 14 that communicates with the water flow path 3, and a mixing faucet that communicates with the mixed water flow path 2. Fixed disk 16 with water outflow holes 15
and a movable disk 17 that is slidably superimposed on the fixed disk 16 and has a passage 16 that connects both or one of the hot water valve hole 13 and the water valve hole 14 to the mixed water outflow hole 15. , operate the lever handle 18 to slide the movable disk 17 on the fixed disk 16 to start and stop the flow of hot water and water from the hot water flow path 1 and the water flow path 3 to the mixed water flow path 2, and to control the flow of hot water and water. The proportion of water flowing into the mixed water flow path 2 is adjusted.

そして、上記湯流路１と水流路３は夫々混合水
流路２に隣接して形成されており、これら湯、水
両流路１，３と混合水流路２を区画する隔壁４
に、上記弁要素を介さずに湯、水両流路１，３と
混合水流路２を連絡する通孔１９を穿設すると共
にこの通孔１９と同軸の開口２０を本体Ａに開設
して該開口２０と通孔１９とに亘つて、カートリ
ツジケース２１内に機能部を収容したウオーター
ハンマー防止ユニツトｄを装着する。 The hot water flow path 1 and the water flow path 3 are respectively formed adjacent to the mixed water flow path 2, and a partition wall 4 is formed to partition the hot water and water flow paths 1, 3 and the mixed water flow path 2.
A through hole 19 is formed in the main body A to communicate the hot water and water flow paths 1 and 3 with the mixed water flow path 2 without using the valve element, and an opening 20 coaxial with the through hole 19 is opened in the main body A. A water hammer prevention unit d having a functional section housed in a cartridge case 21 is installed across the opening 20 and the through hole 19.

また、湯流路１は湯入口２２を、水流路３は水
入口２３を夫々本体Ａの背面に突出状に開設して
おり、これら湯、水両入口２２，２３には夫々構
造の異なる逆止弁ａ，ｂを配設する。 The hot water flow path 1 has a hot water inlet 22, and the water flow path 3 has a water inlet 23 projecting from the back of the main body A, and these hot water and water inlets 22 and 23 have different structures. Install stop valves a and b.

即ち、湯側、水側夫々の逆止弁ａ，ｂは、いず
れも入口２２，２３に装着される円筒状の弁座部
材１０，１１とこの弁座部材１０，１１に対応し
て、その２次側から接離自在に対応する逆止弁体
２４，２５とにより構成するが、湯側の逆止弁ａ
は湯入口２２を螺孔となすと共に弁座部材１０の
外周面に螺子２６を設けて、弁座部材１０を湯入
口２２に螺着固定し、水側の逆止弁ｂは水入口２
３内周面及び弁座部材１１外周面の双方を平滑面
となして弁座部材１１を水入口２３に摺動自在に
挿入し、１次側からバネ１２で２次側方向へ付勢
する。 That is, the check valves a and b on the hot water side and the water side each have cylindrical valve seat members 10 and 11 attached to the inlets 22 and 23, and corresponding valve seat members 10 and 11, respectively. It is composed of check valve bodies 24 and 25 that can freely approach and separate from the secondary side, but the check valve a on the hot water side
The hot water inlet 22 is formed into a screw hole, and a screw 26 is provided on the outer peripheral surface of the valve seat member 10 to screw and fix the valve seat member 10 to the hot water inlet 22, and the check valve b on the water side is connected to the water inlet 2.
3. With both the inner peripheral surface and the outer peripheral surface of the valve seat member 11 made smooth, the valve seat member 11 is slidably inserted into the water inlet 23, and biased from the primary side toward the secondary side by the spring 12. .

上記バネ１２は水入口２３の開口端近くに嵌着
するリング２７と弁座部材１１とにわたつて弾装
する。 The spring 12 is loaded across the valve seat member 11 and a ring 27 fitted near the open end of the water inlet 23.

一方、前記ウオーターハンマー防止ユニツトｄ
のカートリツジケース２１は、一端を開放すると
共に他端には段部を介して逃し弁孔６を開設し、
段部内周側には逃し弁孔６の孔縁に沿つて逃し弁
座５を突出形成する。 On the other hand, the water hammer prevention unit d
The cartridge case 21 is open at one end and has a relief valve hole 6 at the other end through a step.
A relief valve seat 5 is formed to protrude along the edge of the relief valve hole 6 on the inner peripheral side of the stepped portion.

また、カートリツジケース２１は、逃し弁座５
近傍の周面に流入孔２８を開穿すると共にこの流
入孔２８より開放端側に若干寄つた部分の周面に
小孔２９を開穿する。 The cartridge case 21 also has a relief valve seat 5.
An inflow hole 28 is drilled in the nearby circumferential surface, and a small hole 29 is bored in the circumferential surface of a portion slightly closer to the open end side than the inflow hole 28.

そして、このカートリツジケース２１は、内部
にピストン８と、逃し弁体９と、補助ピストン３
０と、上記ピストン８と補助ピストン３０を相互
に反対方向に付勢するバネ７を収容配備し、逃し
弁座５側を先にして、開口２０から湯、水両流路
１，３に夫々挿入し、先端を隔壁４の通孔１９に
嵌合すると共に後端には、開口２０の蓋を兼ねる
蓋３１を螺着して、隔壁４と開口２０に亘つて挟
着固定する。 This cartridge case 21 has a piston 8, a relief valve body 9, and an auxiliary piston 3 inside.
0, and a spring 7 that biases the piston 8 and the auxiliary piston 30 in mutually opposite directions. The tip is inserted into the through hole 19 of the partition wall 4, and the lid 31, which also serves as a cover for the opening 20, is screwed onto the rear end, and the partition wall 4 and the opening 20 are clamped and fixed.

ピストン８は、カートリツジケース２１内周面
に対して摺動自在に設けられ、逃し弁座５に対向
する端面にはシートパツキンを取りつけて逃し弁
体９を一体に設ける。 The piston 8 is slidably provided on the inner peripheral surface of the cartridge case 21, and a seat packing is attached to the end surface facing the relief valve seat 5, and a relief valve body 9 is integrally provided therein.

またピストン８は、逃し弁体９を設けた端面と
は反対側の端面から軸方向中途部にかけて凹孔３
２を凹設すると共にこの凹孔３２底部から逃し弁
体９前面中央に貫ける透孔３３を穿設し、該透孔
には逃し弁体９を構成するシートパツキンの固定
を兼ねて貫通孔付ビス３４を螺着する。 Further, the piston 8 has a concave hole 3 extending from the end surface opposite to the end surface where the relief valve body 9 is provided to a midway portion in the axial direction.
2 is recessed, and a through hole 33 is bored from the bottom of the recessed hole 32 to the center of the front surface of the relief valve body 9, and a through hole is provided in the through hole to also fix the sheet packing that constitutes the relief valve body 9. Screw in screw 34.

上記ピストン８は逃し弁体９が逃し弁座５に着
座した状態で、後端、即ち凹孔３２開放端がカー
トリツジケース２１に螺着した蓋３１との間に若
干の間隔を有する。従つてピストン８はその間隔
分後方へ摺動することができ、後方へ摺動するこ
とにより逃し弁体９が逃し弁座５から離れる。 When the relief valve element 9 is seated on the relief valve seat 5, the piston 8 has a slight distance between its rear end, that is, the open end of the recessed hole 32, and the lid 31 screwed onto the cartridge case 21. Therefore, the piston 8 can slide rearward by that distance, and by sliding backward, the relief valve body 9 separates from the relief valve seat 5.

また、ピストン８は、カートリツジケース２１
の流入孔２８と小孔２９の間に位置する部分の周
面にシールパツキン３５を流入孔２８側に凹の状
態に嵌着すると共にＵパツキン３５嵌着部より後
方の外径をカートリツジケース２１内径より僅か
に小径に形成して両者間にできる僅かな間〓によ
り小孔２９から流入する湯（水）をピストン８後
方の間〓に導く小通路３６を形成する。 The piston 8 is also mounted in the cartridge case 21.
A seal packing 35 is fitted into the peripheral surface of the portion located between the inlet hole 28 and the small hole 29 in a concave state toward the inlet hole 28, and the outer diameter rearward of the fitting portion of the U-packing 35 is made slightly smaller than the inner diameter of the cartridge case 21, so that a small gap is formed between the two to form a small passage 36 which guides hot water (cold water) flowing in from the small hole 29 to the gap behind the piston 8.

補助ピストン３０はピストン８の凹孔３２内周
面に対して摺動自在に設けられて凹孔３２の開口
部を塞ぎ、凹孔３２内に空室３７を形成する。 The auxiliary piston 30 is slidably provided on the inner circumferential surface of the recessed hole 32 of the piston 8 and closes the opening of the recessed hole 32 to form a cavity 37 within the recessed hole 32 .

バネ７はピストン８の凹孔３２底部と補助ピス
トン３０とに亘つて弾装し、ピストン８を、逃し
弁体９を逃し弁座５に圧接せしめる方向に付勢す
ると共に補助ピストン３０を蓋３１に圧接せしめ
る方向に付勢する。 The spring 7 is elastically loaded between the bottom of the concave hole 32 of the piston 8 and the auxiliary piston 30, and biases the piston 8 in a direction that presses the relief valve element 9 against the relief valve seat 5, and also pushes the auxiliary piston 30 against the lid 31. energized in the direction of pressing into contact with.

而して、斬る湯水混合栓は、給湯時、可動デイ
スク１７を摺動させて給湯を停止し、湯流路１、
水流路３内の圧力が瞬間的に上昇すると、その上
昇圧力はカートリツジケース２１の流入孔２８を
介してピストン８及び逃し弁体９前面に直ちに作
用する。 Therefore, when hot water is being supplied, the cutting hot water mixing faucet stops the hot water supply by sliding the movable disk 17, and the hot water flow path 1,
When the pressure in the water flow path 3 momentarily increases, the increased pressure immediately acts on the front surface of the piston 8 and the relief valve body 9 through the inflow hole 28 of the cartridge case 21.

一方、湯流路１、水流路３はカートリツジケー
ス２１の小孔２９及び小通路３６を介してピスト
ン８及び補助ピストン３０背後と連絡している
が、上記小孔２９及び小通路３６は非常に狭いた
め湯流路１、水流路３の圧力上昇がピストン８及
び補助ピストン３０背後に作用するには若干の時
間を必要とする。 On the other hand, the hot water flow path 1 and the water flow path 3 communicate with the rear of the piston 8 and the auxiliary piston 30 via the small hole 29 and small passage 36 of the cartridge case 21, but the small hole 29 and the small passage 36 are Since the pistons are narrow, it takes some time for the pressure increase in the hot water passage 1 and the water passage 3 to act on the rear of the piston 8 and the auxiliary piston 30.

従つて、湯流路１、水流路３の圧力が急上昇し
た瞬間、ピストン８の前面側と背面側に作用する
圧力には差が出来、この圧力差によりピストン８
がバネ７の力に抗して後退し、これと一体に設け
られた逃し弁体９が逃し弁座５から離れて逃し弁
孔６を開放するので、上昇圧力は混合水流路３を
経由して吐出口３８から放出される。（第３図） この圧力放出により、湯流路１、水流路３内の
圧力が低下すると、ピストン８はバネ７の力によ
り前進して、逃し弁体９が逃し弁座５に当接す
る。 Therefore, at the moment when the pressure in the hot water flow path 1 and the water flow path 3 suddenly increases, a difference is created between the pressures acting on the front side and the back side of the piston 8, and this pressure difference causes the piston 8 to
moves back against the force of the spring 7, and the relief valve body 9 provided integrally with it separates from the relief valve seat 5 and opens the relief valve hole 6, so that the increased pressure passes through the mixed water flow path 3. and is discharged from the discharge port 38. (FIG. 3) When the pressure in the hot water passage 1 and the water passage 3 decreases due to this pressure release, the piston 8 moves forward by the force of the spring 7, and the relief valve body 9 comes into contact with the relief valve seat 5.

また給湯元、給水元の圧力変動などによつて、
湯流路１、水流路３の圧力が上昇する場合には、
圧力の上昇は緩慢に行われ、ピストン８の前面側
と背面側にはほとんど圧力差が生じないため、ピ
ストン８及び逃し弁体９は作動せず、逃し弁座孔
６は開かないが、湯、水流路１，３内圧力がバネ
７の力を越えると補助ピストン８が空室３７内に
押し込まれ、一次圧とつり合う位置まで補助ピス
トンが移動する。 Also, due to pressure fluctuations at the hot water supply source and water supply source,
When the pressure of hot water flow path 1 and water flow path 3 increases,
The pressure rises slowly, and there is almost no pressure difference between the front and back sides of the piston 8, so the piston 8 and the relief valve body 9 do not operate, and the relief valve seat hole 6 does not open, but the hot water When the pressure inside the water channels 1 and 3 exceeds the force of the spring 7, the auxiliary piston 8 is pushed into the cavity 37 and moves to a position where it balances the primary pressure.

而して、空気３７の容積減少により、湯、水流
路１，３の容積がその分増大し、この湯流路１、
水流路２の容積増大により上昇圧力は吸収され
る。（第４図） また、湯側のみ長期使用に伴い隔壁４を介して
伝わる湯側の熱により水側が加熱され、水流路３
の開閉弁ｃ部と逆止弁ｂの間の密閉空間３９内の
水が熱膨張して該空間３９内の圧力が上昇した場
合にも水側のウオーターハンマー防止ユニツトｄ
の補助ピストン３０は、上記同様作動するが、同
時に水側逆止弁ｂの弁座部材１１が上昇圧力によ
り押圧されてその１次側へスライド移動し、上記
密閉空間３９を更に拡張して上昇圧力を吸収す
る。（第４図） 一方、給湯源を同じくして複数設置された湯水
混合栓のうちのどれかが給湯を開始したり、停止
したりすることにより湯側の圧力に変動が生じた
場合、湯側のウオーターハンマー防止ユニツトｄ
の補助ピストン８が作動することはあつても、湯
側逆止弁ａの弁座部材１０は、湯流路１に固定さ
れているため移動することはない。 Therefore, as the volume of the air 37 decreases, the volumes of the hot water and water flow paths 1 and 3 increase accordingly, and the hot water flow paths 1 and 3 increase accordingly.
The increased pressure is absorbed by increasing the volume of the water flow path 2. (Fig. 4) In addition, as only the hot water side is used for a long time, the water side is heated by the heat from the hot water side that is transmitted through the partition wall 4, and the water flow path 3
Even if the water in the sealed space 39 between the opening/closing valve c and the check valve b expands thermally and the pressure in the space 39 increases, the water hammer prevention unit d on the water side
The auxiliary piston 30 operates in the same manner as described above, but at the same time, the valve seat member 11 of the water side check valve b is pressed by the rising pressure and slides toward its primary side, further expanding the sealed space 39 and rising. Absorb pressure. (Fig. 4) On the other hand, if any of the hot water mixing faucets installed with the same hot water supply source starts or stops supplying hot water, and the pressure on the hot water side fluctuates, Side water hammer prevention unit d
Although the auxiliary piston 8 may operate, the valve seat member 10 of the hot water side check valve a does not move because it is fixed to the hot water flow path 1.

尚、上記実施例ではウオーターハンマー防止ユ
ニツトの構造が第５図に示した従来のウオーター
ハンマー防止構造と相違しているが、第５図に示
したウオーターハンマー防止構造と同じ構造とす
ることも勿論任意である。 Although the structure of the water hammer prevention unit in the above embodiment is different from the conventional water hammer prevention structure shown in FIG. 5, it is of course possible to use the same structure as the water hammer prevention structure shown in FIG. Optional.

（効果） 本考案は上記の構成であるから以下の利点を有
する。(Effects) Since the present invention has the above configuration, it has the following advantages.

湯流路には弁座を湯流路に固定した逆止弁を、
水流路には弁座を水流路壁面に対して摺動自在に
配備し、該弁座をバネにより二次側へ付勢した逆
止弁を、夫々上記逃し弁座より上流側に設けたの
で、湯側のみの使用により生ずる水側の密閉空間
（開閉弁部と逆止弁間）内の圧力上昇を水側逆止
弁の１次側へのスライド移動により吸収すること
ができる一方、給湯源を同じくして複数設置され
た湯水混合栓のうちいずれかが使用されたり、使
用を停止したときに生ずる湯側の圧力変動により
湯側逆止弁の弁座が移動することはなく、従つて
湯側の逆止弁座が移動して、逆止弁下流側の湯流
路の圧力が瞬間的に上昇してピストン及び逃し弁
体を作動させ水を排出するようなことはない。 A check valve with a valve seat fixed to the hot water flow path is installed in the hot water flow path.
A valve seat is provided in the water flow path so as to be slidable against the wall surface of the water flow path, and a check valve in which the valve seat is biased toward the secondary side by a spring is provided on the upstream side of the relief valve seat. , the pressure increase in the closed space (between the open/close valve part and the check valve) on the water side that occurs when only the hot water side is used can be absorbed by sliding the water side check valve toward the primary side. The valve seat of the check valve on the hot water side will not move due to pressure fluctuations on the hot water side that occur when one of the multiple hot water mixing faucets installed with the same source is used or stopped. There is no possibility that the check valve seat on the hot water side will move and the pressure in the hot water flow path on the downstream side of the check valve will instantaneously rise to operate the piston and relief valve body to discharge water.

即ち、ウオーターハンマー防止機構を備えた湯
水混合栓において、他の湯水混合栓の使用によ
り、使用していない湯水混合栓のウオーターハン
マー防止機構が作動するのを、水側の熱膨張によ
る圧力上昇を吸収する機能を損うことなく防止す
ることができる。 In other words, in a hot water mixer faucet equipped with a water hammer prevention mechanism, the use of another hot water mixer faucet prevents the water hammer prevention mechanism of the unused hot water mixer faucet from activating, and prevents pressure rise due to thermal expansion on the water side. This can be prevented without impairing the absorption function.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例を示す湯水混合栓の
横断平面図、第２図は縦断正面図、第３図，第４
図は作動状態を示す拡大断面図で水側を示してあ
る。第５図は従来の湯水混合栓の一例を示す横断
平面図である。 Ａ……湯水混合栓、ａ……湯側の逆止弁、ｂ…
…水側の逆止弁、１……湯流路、２……混合水流
路、３……水流路、４……隔壁、５……逃し弁
座、６……逃し弁孔、７……逃し弁のバネ、８…
…ピストン、９……逃し弁体、１０……湯側逆止
弁の弁座部材、１１……水側逆止弁の弁座部材、
１２……逆止弁のバネ。 Fig. 1 is a cross-sectional plan view of a hot water mixer faucet showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional front view, Figs.
The figure is an enlarged sectional view showing the operating state and shows the water side. FIG. 5 is a cross-sectional plan view showing an example of a conventional hot water mixing faucet. A...Hot water mixing faucet, a...Check valve on the hot water side, b...
... Water side check valve, 1 ... Hot water flow path, 2 ... Mixed water flow path, 3 ... Water flow path, 4 ... Partition wall, 5 ... Relief valve seat, 6 ... Relief valve hole, 7 ... Relief valve spring, 8...
... Piston, 9 ... Relief valve body, 10 ... Valve seat member of hot water side check valve, 11 ... Valve seat member of water side check valve,
12...Check valve spring.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 湯水混合栓本体の湯流路と混合水流路、水流路
と混合水流路を区画する隔壁部分に、夫々湯流路
側、水流路側を１次側とする逃し弁座及び逃し弁
孔を設け、各逃し弁座の１次側にはバネにより常
時逃し弁座側に付勢されると共に１次側の圧力を
受けて該圧力が上記バネのバネ力を越えると逃し
弁座から遠ざかるように作動するピストンと、該
ピストンに連係して進退して逃し弁座に接離する
逃し弁体を配備する湯水混合栓において、湯流路
には弁座部材を湯流路に固定した逆止弁を、水流
路には弁座部材を水流路壁面に対して摺動自在に
配備し、該弁座部材をバネにより二次側へ付勢し
た逆止弁を、夫々上記逃し弁座より上流側に設け
てなる湯水混合栓。 A relief valve seat and a relief valve hole with the hot water flow path side and the water flow path side as the primary side are provided in the partition wall portion that partitions the hot water flow path and the mixed water flow path, and the water flow path and the mixed water flow path of the hot water mixing faucet body, respectively. A spring on the primary side of the relief valve seat is always urged toward the relief valve seat side, and when it receives pressure from the primary side and the pressure exceeds the spring force of the spring, it operates to move away from the relief valve seat. In a hot water mixing faucet equipped with a piston and a relief valve body that moves forward and backward in conjunction with the piston to approach and separate from a relief valve seat, a check valve with a valve seat member fixed to the hot water flow path is provided in the hot water flow path. A valve seat member is provided in the water flow path so as to be slidable against the wall surface of the water flow path, and a check valve in which the valve seat member is biased toward the secondary side by a spring is provided on the upstream side of the relief valve seat. A hot and cold water mixing faucet.