JP6429843B2

JP6429843B2 - Pressure reducing valve

Info

Publication number: JP6429843B2
Application number: JP2016206294A
Authority: JP
Inventors: 近藤　大介; 大介近藤; 望月　健一; 健一望月
Original assignee: Fujikoki Corp
Current assignee: Fujikoki Corp
Priority date: 2016-10-20
Filing date: 2016-10-20
Publication date: 2018-11-28
Anticipated expiration: 2036-10-20
Also published as: KR102340955B1; JP2018067204A; CN107965596B; CN107965596A; KR20180043728A

Description

本発明は、給湯設備等に使用される減圧弁に係り、特に弁本体の内部に一次側圧力を二次側に逃がす逃がし弁が設けられた減圧弁に関する。 The present invention relates to a pressure reducing valve used in a hot water supply facility or the like, and more particularly, to a pressure reducing valve provided with a relief valve for releasing a primary side pressure to a secondary side inside a valve body.

この種の減圧弁として、例えば下記特許文献１に所載のように、樹脂製の弁本体と、弁棒と、感圧応動部材（ダイアフラム装置）とを備えたものが知られている。 As this kind of pressure-reducing valve, as described in Patent Document 1 below, for example, a valve having a resin valve body, a valve rod, and a pressure-sensitive reaction member (diaphragm device) is known.

詳細には、特許文献１に所載の減圧弁では、内部に弁口付き弁座を有する弁室が設けられるとともに、前記弁口の下側に流出室が設けられ、外周部に前記弁室に連なる一次側流入口と前記流出室に連なる二次側流出口が設けられた一部材からなる弁本体と、前記弁口をその下側から開閉するための弁体部が設けられ、前記弁本体に上下方向に摺動自在に嵌挿された弁棒と、前記二次側流出口の二次側圧力を感知して前記弁棒を上下方向に駆動すべく前記弁本体に取り付けられた感圧応動部材と、を備えている。 Specifically, in the pressure reducing valve described in Patent Document 1, a valve chamber having a valve seat with a valve port is provided therein, an outflow chamber is provided below the valve port, and the valve chamber is provided at an outer peripheral portion. A valve main body comprising a single member provided with a primary side inlet connected to the outlet and a secondary side outlet connected to the outflow chamber, and a valve body part for opening and closing the valve port from below, the valve A valve stem that is slidably inserted in the main body in the vertical direction, and a feeling that is attached to the valve main body to drive the valve rod in the vertical direction by sensing the secondary pressure at the secondary outlet. A pressure response member.

また、かかる減圧弁では、樹脂製の弁本体及び他の構成部品等を保護するため、一次側圧力が所定値を超えたときに開弁して一次側圧力を二次側に逃がす逃がし弁が弁本体の内部に設けられている。この逃がし弁は、弁室に開口する逃がし弁口と、該逃がし弁口と連通するとともに二次側流出口に開口する横孔と、該横孔の側端部に挿着固定されたばね受け蓋と、逃がし弁口を開閉するボール弁体と、該ボール弁体を閉弁方向に付勢する圧縮コイルばねからなる閉弁ばねとから構成されている。 Further, in such a pressure reducing valve, there is a relief valve that opens when the primary side pressure exceeds a predetermined value and releases the primary side pressure to the secondary side in order to protect the resin valve body and other components. It is provided inside the valve body. The relief valve includes a relief valve opening that opens to the valve chamber, a horizontal hole that communicates with the relief valve opening and opens to the secondary side outlet, and a spring receiving cover that is fixedly inserted into a side end of the horizontal hole. And a ball valve body that opens and closes the relief valve port, and a valve closing spring comprising a compression coil spring that biases the ball valve body in the valve closing direction.

特開２０１５−２１０５３５号公報JP2015-210535A

ところで、上記特許文献１に所載の減圧弁では、前記ばね受け蓋は、一般に超音波溶着により横孔の側端部に固定される。詳しくは、ゴム製のボール弁体及び閉弁ばねをその順で横孔に装着した後に、ばね受け蓋を閉弁ばねに押し付けて該閉弁ばねを圧縮しながらばね受け蓋を超音波溶着で横孔の側端部に固定させることによって組み立てられる。このため、超音波溶着で発生した振動がばね受け蓋を経由して閉弁ばねやゴム製のボール弁体に伝わり、当該ボール弁体が溶融もしくは変形して閉弁ばねに食い込んでしまう。これによって、想定した閉弁ばねの取り付け長さ（以下、取付長という）が得られず、取り付け荷重が少なくなって制御性が低下するという問題があった。 Incidentally, in the pressure reducing valve described in Patent Document 1, the spring receiving lid is generally fixed to the side end portion of the horizontal hole by ultrasonic welding. Specifically, after the rubber ball valve body and the valve closing spring are mounted in the horizontal holes in this order, the spring receiving cover is pressed against the valve closing spring to compress the valve closing spring and ultrasonically weld the spring receiving cover. It is assembled by fixing it to the side end of the horizontal hole. For this reason, the vibration generated by the ultrasonic welding is transmitted to the valve closing spring and the rubber ball valve body through the spring receiving cover, and the ball valve body is melted or deformed and bites into the valve closing spring. As a result, the assumed attachment length of the valve-closing spring (hereinafter referred to as attachment length) cannot be obtained, and there is a problem that the attachment load is reduced and the controllability is lowered.

また、逃がし弁の組立時に、閉弁ばねの付勢力に抗しながらばね受け蓋を超音波溶着で横孔の側端部に固定する必要があるので、閉弁ばねの反発力によってばね受け蓋の状態が不安定になりやすく、組立作業性が低いという問題もあった。 Also, when assembling the relief valve, it is necessary to fix the spring receiving cover to the side end of the horizontal hole by ultrasonic welding while resisting the urging force of the valve closing spring. There is also a problem that the state of this is likely to become unstable and the assembly workability is low.

本発明は、上記事情に鑑みてなされたもので、逃がし弁組立時の超音波溶着による振動の影響を防止し制御性を確保するとともに、組立作業性の向上を図ることができる減圧弁を提供することを目的とする。 The present invention has been made in view of the above circumstances, and provides a pressure reducing valve capable of preventing the influence of vibration caused by ultrasonic welding during assembly of a relief valve, ensuring controllability, and improving assembly workability. The purpose is to do.

上記目的を達成するために、本発明に係る減圧弁は、内部に弁口付き弁座を有する弁室が設けられるとともに、前記弁口の下側に流出室が設けられ、外周部に前記弁室に連なる一次側流入口と前記流出室に連なる二次側流出口とが設けられた弁本体と、前記弁口を開閉するべく前記弁本体に上下方向に摺動自在に嵌挿された弁棒と、前記二次側流出口の二次側圧力を感知して前記弁棒を上下方向に駆動すべく前記弁本体に取り付けられた感圧応動部材と、を備え、前記弁本体に、前記一次側流入口の一次側圧力が所定値を超えたとき、その一次側圧力を前記二次側流出口に逃がす逃がし弁が設けられた減圧弁であって、前記逃がし弁は、前記弁室に開口する逃がし弁口と、前記逃がし弁口と連通するとともに前記二次側流出口に開口する筒状空所からなる収納穴とを有し、前記収納穴に、前記逃がし弁口を開閉する弁体と、該弁体を閉弁方向に付勢する閉弁ばねとが収納されるとともに、前記閉弁ばねを圧縮状態で保持するばね受け蓋が前記収納穴に対する相対回転により係合固定され、前記収納穴に、前記閉弁ばねの付勢力による前記ばね受け蓋の前記二次側流出口側への移動を阻止する突起部が設けられ、前記ばね受け蓋における前記二次側流出口側の外周に、前記突起部と係合せしめられる係合窪みが設けられ、前記ばね受け蓋が前記収納穴に内接せしめられるとともに、前記ばね受け蓋の外周に、前記係合窪みに連なる空気逃げ通路が設けられていることを特徴としている。 In order to achieve the above object, a pressure reducing valve according to the present invention includes a valve chamber having a valve seat with a valve port therein, an outflow chamber provided below the valve port, and the valve on an outer peripheral portion. A valve body provided with a primary side inlet connected to the chamber and a secondary side outlet connected to the outflow chamber, and a valve slidably inserted in the valve body to open and close the valve port A pressure sensing member attached to the valve body to sense the secondary pressure at the secondary outlet and drive the valve rod in the vertical direction. A pressure reducing valve provided with a relief valve for releasing the primary side pressure to the secondary side outlet when the primary side pressure of the primary side inlet exceeds a predetermined value, wherein the relief valve is provided in the valve chamber. An opening relief valve opening, and a tubular shape communicating with the relief valve opening and opening to the secondary outlet And a valve body that opens and closes the relief valve port and a valve closing spring that urges the valve body in a valve closing direction are housed in the storage hole. A spring receiving cover for holding the spring in a compressed state is engaged and fixed by relative rotation with respect to the storage hole, and the spring receiving cover is biased into the storage hole by the biasing force of the valve closing spring toward the secondary outlet port side. A protrusion for preventing the movement is provided, and an engagement recess that is engaged with the protrusion is provided on an outer periphery of the secondary receiving outlet side of the spring receiving cover, and the spring receiving cover is provided in the storage hole. In addition to being inscribed, an air escape passage continuing to the engagement recess is provided on the outer periphery of the spring receiving lid .

好ましい形態では、前記ばね受け蓋に、前記逃がし弁口側と前記二次側流出口側とを連通する貫通孔が設けられている、あるいは、前記ばね受け蓋の前記二次側流出口側の端面に、凹状窪みが設けられている。 In a preferred embodiment, the spring receiving lid is provided with a through hole that communicates the relief valve port side and the secondary outlet port side, or on the secondary outlet port side of the spring receiving lid. A concave recess is provided on the end face.

好ましい形態では、前記貫通孔あるいは前記凹状窪みの少なくとも一部は、断面非円形状を有する。 In a preferred embodiment, at least a part of the through hole or the concave depression has a non-circular cross section.

好ましい形態では、前記ばね受け蓋は、前記収納穴内に、該収納穴の軸線方向に沿って移動可能、且つ、該収納穴の軸線回りに回転可能に配在されている。 In a preferred embodiment, the spring receiving lid is disposed in the storage hole so as to be movable along the axial direction of the storage hole and to be rotatable about the axis of the storage hole.

また、好ましい形態では、前記ばね受け蓋の外周に、前記ばね受け蓋を前記収納穴に挿入するときに前記突起部との干渉を回避するための逃げ溝が設けられている。 In a preferred embodiment, a clearance groove is provided on the outer periphery of the spring receiving cover for avoiding interference with the protrusion when the spring receiving cover is inserted into the storage hole.

他の好ましい形態では、前記収納穴における前記突起部、並びに、前記ばね受け蓋における前記係合窪み及び前記逃げ溝はそれぞれ複数設けられている。 In another preferred embodiment, a plurality of the projections in the storage hole and a plurality of the engagement recesses and the escape grooves in the spring receiving lid are provided.

他の好ましい形態では、前記収納穴における前記突起部、並びに、前記ばね受け蓋における前記係合窪み及び前記逃げ溝はそれぞれ等間隔で設けられている。 In another preferred embodiment, the protrusion in the storage hole and the engagement recess and the escape groove in the spring receiving lid are provided at equal intervals.

他の好ましい形態では、前記ばね受け蓋に、前記収納穴での前記ばね受け蓋の回転に伴って前記突起部に当接して前記収納穴での前記ばね受け蓋の回転を規制する回転規制部が設けられている。 In another preferred embodiment, a rotation restricting portion that restricts the rotation of the spring receiving cover in the storage hole by contacting the protrusion with the spring receiving cover as the spring receiving cover rotates in the storage hole. Is provided.

他の好ましい形態では、前記収納穴は、前記逃がし弁口に連通する円筒状空所からなる第１収納穴と、前記二次側流出口に開口するとともに前記第１収納穴より大径の第２収納穴とを有する。 In another preferred embodiment, the storage hole includes a first storage hole formed of a cylindrical space communicating with the relief valve port, and a second opening having a diameter larger than that of the first storage hole. 2 storage holes.

更に好ましい形態では、前記第１収納穴と前記第２収納穴との間に形成される段差部が、前記ばね受け蓋の前記逃がし弁口側への移動を阻止するストッパ部とされる。 In a further preferred form, the step portion formed between the first storage hole and the second storage hole is a stopper portion that prevents the spring receiving cover from moving toward the relief valve port.

更に好ましい形態では、前記ばね受け蓋は、前記第１収納穴に内挿される大きさの一端側小径部と、前記第１収納穴より大径の他端側大径部とを有し、前記一端側小径部と前記他端側大径部との間に形成される段差部が、前記収納穴の前記ストッパ部に対接せしめられるようにされている。 In a more preferred form, the spring receiving lid has a small-diameter portion on one end side having a size inserted into the first storage hole, and a large-diameter portion on the other end side having a larger diameter than the first storage hole, A step portion formed between the one end side small diameter portion and the other end side large diameter portion is configured to be brought into contact with the stopper portion of the storage hole.

更に好ましい形態では、前記ばね受け蓋は、前記閉弁ばねの付勢力に抗して前記一端側小径部が前記第１収納穴に内挿された状態で、前記収納穴内で回転自在とされている。 In a further preferred form, the spring receiving lid is rotatable in the storage hole in a state where the one end side small diameter portion is inserted into the first storage hole against the urging force of the valve closing spring. Yes.

更に好ましい形態では、前記他端側大径部が、前記第２収納穴に内接せしめられるようにされている。 In a more preferred embodiment, the other end side large diameter portion is inscribed in the second storage hole.

更に好ましい形態では、前記弁本体に設けられた装着穴に、前記第２収納穴を形成する貫通孔を有するとともに、前記突起部が設けられた筒状部材が固定されている。 In a more preferred form, the mounting member provided in the valve main body has a through-hole that forms the second storage hole, and a cylindrical member provided with the projection is fixed.

更に好ましい形態では、前記筒状部材は、超音波溶着により前記弁本体の前記装着穴に固着されている。 In a more preferred embodiment, the cylindrical member is fixed to the mounting hole of the valve body by ultrasonic welding.

本発明に係る減圧弁によれば、逃がし弁口を開閉する弁体と該弁体を閉弁方向に付勢する閉弁ばねとを収納するための収納穴を有し、該収納穴に前記閉弁ばねを圧縮状態で保持するばね受け蓋が前記収納穴に対する相対回転により係合固定されているので、従来のように超音波溶着でばね受け蓋を収納穴の二次側流出口側の端部に固定させる必要がない。このため、逃がし弁組立時の超音波溶着による振動の影響を防止することができ、想定した閉弁ばねの取付長を得られるので制御性を確実に確保することができる。また、逃がし弁の組立にあたっては、例えば収納穴に弁体と閉弁ばねとを挿入した後に、ばね受け蓋を該収納穴に挿入し回転することにより該収納穴に係合固定させることができるので、逃がし弁を容易に組み立てることができ、組立作業性の向上を図りやすくなる。 The pressure reducing valve according to the present invention has a storage hole for storing the valve body that opens and closes the relief valve port and the valve closing spring that biases the valve body in the valve closing direction, and the storage hole has the storage hole. Since the spring receiving cover that holds the valve closing spring in a compressed state is engaged and fixed by relative rotation with respect to the storage hole, the spring receiving cover is placed on the secondary outlet side of the storage hole by ultrasonic welding as in the prior art. There is no need to fix it to the end. For this reason, it is possible to prevent the influence of vibration caused by ultrasonic welding at the time of assembly of the relief valve, and to obtain the assumed installation length of the valve closing spring, so that controllability can be reliably ensured. When the relief valve is assembled, for example, after inserting a valve body and a valve closing spring into the storage hole, the spring receiving lid can be inserted into the storage hole and rotated to be engaged and fixed in the storage hole. Therefore, the relief valve can be easily assembled, and the assembly workability can be easily improved.

また、ばね受け蓋に逃がし弁口側と二次側流出口側とを連通する貫通孔が設けられている、あるいは、ばね受け蓋の二次側流出口側の端面に凹状窪みが設けられているので、この貫通孔あるいは凹状窪みを介して二次側流出口側からばね受け蓋を回転させることができる。しかも、貫通孔あるいは凹状窪みの少なくとも一部が断面非円形状を有する場合、ばね受け蓋の回転を容易に行うことができる。 Also, the spring receiving cover is provided with a through hole that allows the relief valve port side and the secondary side outlet side to communicate with each other, or the end face on the secondary side outlet side of the spring receiving cover is provided with a concave recess. Therefore, the spring receiving cover can be rotated from the secondary side outlet side through the through hole or the concave depression. In addition, when at least a part of the through hole or the concave depression has a non-circular cross section, the spring receiving lid can be easily rotated.

更に、収納穴に、閉弁ばねの付勢力によるばね受け蓋の二次側流出口側への移動を阻止する突起部が設けられ、ばね受け蓋における二次側流出口側の外周に、突起部と係合せしめられる係合窪みが設けられているので、突起部と係合窪みとからなる係合構造を利用してばね受け蓋を容易に収納穴に固定させることができる。 Furthermore, a protrusion is provided in the storage hole to prevent the spring receiving cover from moving to the secondary outlet side due to the urging force of the valve closing spring, and a protrusion is formed on the outer periphery of the spring receiving cover on the secondary outlet side. Since the engagement recess that is engaged with the portion is provided, the spring receiving lid can be easily fixed to the storage hole using the engagement structure including the projection and the engagement recess.

また、ばね受け蓋に、収納穴での前記ばね受け蓋の回転に伴って突起部に当接して収納穴でのばね受け蓋の回転を規制する回転規制部が設けられているので、この回転規制部を利用して収納穴に対するばね受け蓋の位置決め、すなわち突起部と係合窪みとの位置決めを容易に行うことができる。 In addition, since the spring receiving cover is provided with a rotation restricting portion that abuts on the protrusion as the spring receiving cover rotates in the receiving hole and restricts the rotation of the spring receiving cover in the receiving hole. The positioning of the spring receiving cover with respect to the storage hole, that is, the positioning of the protrusion and the engagement recess can be easily performed using the restricting portion.

更に、収納穴が逃がし弁口に連通する円筒状空所からなる第１収納穴と、二次側流出口に開口するとともに第１収納穴より大径の第２収納穴とを有し、第１収納穴と第２収納穴との間に形成される段差部が、ばね受け蓋の逃がし弁口側への移動を阻止するストッパ部とされるので、ばね受け蓋を収納穴の内部に挿入するときに、該段差部によってこれ以上の逃がし弁口側への挿入が阻止されるので、組立作業をより容易に行うことができる。 Furthermore, the storage hole has a first storage hole formed of a cylindrical space that communicates with the relief valve port, and a second storage hole that opens to the secondary side outlet and has a diameter larger than the first storage hole. The step formed between the 1 storage hole and the 2nd storage hole is a stopper that prevents the spring receiving cover from moving toward the relief valve port, so the spring receiving cover is inserted into the storage hole. In this case, the stepped portion prevents further insertion into the relief valve port side, so that the assembling work can be performed more easily.

更に、弁本体に設けられた装着穴に、第２収納穴を形成する貫通孔を有するとともに、突起部が設けられた筒状部材が固定されているので、該筒状部材を別途加工して装着穴に固定することで弁本体に一体化することが可能になる。従って、例えば弁本体に直接突起部を設けた場合と比べて、突起部の加工性を向上することができるとともに、製品としてのバリエーションを増やすことができる。 Furthermore, since the mounting member provided in the valve body has a through hole that forms the second storage hole and the cylindrical member provided with the protrusion is fixed, the cylindrical member is processed separately. It can be integrated into the valve body by being fixed in the mounting hole. Therefore, for example, the processability of the protrusion can be improved and variations as a product can be increased as compared with the case where the protrusion is directly provided on the valve body.

実施形態に係る減圧弁を示す断面図。Sectional drawing which shows the pressure-reduction valve which concerns on embodiment. 図１中の逃がし弁部分を示す拡大断面図。The expanded sectional view which shows the relief valve part in FIG. 逃がし弁部分を示す分解斜視図。The disassembled perspective view which shows a relief valve part. 筒状部材を示す斜視図。The perspective view which shows a cylindrical member. ばね受け蓋を示す斜視図。The perspective view which shows a spring receiving cover. （ａ）は逃がし弁の組立手順を示す部分側面図、（ｂ）は逃がし弁の組立手順を示す部分断面図。(A) is a partial side view showing the assembly procedure of the relief valve, (b) is a partial cross-sectional view showing the assembly procedure of the relief valve. （ａ）は逃がし弁の組立手順を示す部分側面図、（ｂ）は逃がし弁の組立手順を示す部分断面図。(A) is a partial side view showing the assembly procedure of the relief valve, (b) is a partial cross-sectional view showing the assembly procedure of the relief valve. （ａ）は逃がし弁の組立手順を示す部分側面図、（ｂ）は逃がし弁の組立手順を示す部分断面図。(A) is a partial side view showing the assembly procedure of the relief valve, (b) is a partial cross-sectional view showing the assembly procedure of the relief valve.

以下、図面を参照して本発明に係る減圧弁の実施形態について説明する。なお、以下の説明において、上下、左右、前後等の位置、方向を表わす記述は、説明が煩瑣になるのを避けるために図面に従って便宜上付けたものであり、実際の使用状態での位置、方向を指すものではない。 Hereinafter, an embodiment of a pressure reducing valve according to the present invention will be described with reference to the drawings. In the following description, descriptions representing positions and directions such as up and down, left and right, and front and rear are given for the sake of convenience in accordance with the drawings in order to avoid complicated description, and the positions and directions in the actual use state. It does not point to.

図１は実施形態に係る減圧弁を示す断面図である。本実施形態の減圧弁１は、例えば給湯設備等に使用されるものであり、主に、弁本体１０と、弁本体１０の内部に収納された弁棒３０と、感圧応動部材としてのダイアフラム装置４０とを備えている。 FIG. 1 is a cross-sectional view showing a pressure reducing valve according to an embodiment. The pressure reducing valve 1 according to the present embodiment is used in, for example, hot water supply equipment, and mainly includes a valve body 10, a valve rod 30 housed in the valve body 10, and a diaphragm as a pressure sensitive response member. Device 40.

弁本体１０は、例えば樹脂材料によって形成されており、その内部には、弁口２２付き弁座２３を有する円筒状の弁室２１が設けられ、弁口２２の下側には、流出室２６が設けられている。この弁本体１０は、弁室２１に連なるように開口する上面開口１０ａと、流出室２６に連なるように開口する下面開口１０ｂとを有し、下面開口１０ｂは厚肉略円板状の底蓋部材６０によって塞がれている。上面開口１０ａは、前記ダイアフラム装置４０によって閉塞されている。 The valve body 10 is formed of, for example, a resin material, and a cylindrical valve chamber 21 having a valve seat 23 with a valve port 22 is provided therein, and an outflow chamber 26 is provided below the valve port 22. Is provided. The valve body 10 has an upper surface opening 10a that opens so as to be continuous with the valve chamber 21, and a lower surface opening 10b that opens so as to be continuous with the outflow chamber 26. The lower surface opening 10b has a thick, substantially disk-shaped bottom lid. It is blocked by the member 60. The upper surface opening 10 a is closed by the diaphragm device 40.

弁本体１０の外周部には、弁室２１に連なる一次側流入口１１と流出室２６に連なる二次側流出口１２とが、それぞれ横向きに形成されている。弁室２１と一次側流入口１１および流出室２６と二次側流出口１２は、横方向（すなわち、水平方向）に並設されるとともに、それらの中心軸が縦方向（すなわち、上下方向）において所定の距離で離れて配置されている。言い換えれば、一次側流入口１１と二次側流出口１２とは、縦方向において同軸上に配置されていない。このため、弁室２１と二次側流出口１２との間には、上述の弁口２２付き弁座２３の一部を構成する段差部１３が形成されている。なお、一次側流入口１１と二次側流出口１２とが縦方向において同軸上に配置されていても、弁本体１０の内部形状を変更することにより、段差部１３を形成することができる。 A primary side inlet 11 connected to the valve chamber 21 and a secondary side outlet 12 connected to the outlet chamber 26 are respectively formed laterally on the outer periphery of the valve body 10. The valve chamber 21, the primary side inlet 11, the outflow chamber 26, and the secondary side outlet 12 are juxtaposed in the horizontal direction (that is, the horizontal direction), and their central axes are in the vertical direction (that is, the vertical direction). Are arranged at a predetermined distance. In other words, the primary side inlet 11 and the secondary side outlet 12 are not coaxially arranged in the vertical direction. For this reason, a step portion 13 is formed between the valve chamber 21 and the secondary outlet 12 which constitutes a part of the valve seat 23 with the valve port 22 described above. In addition, even if the primary side inflow port 11 and the secondary side outflow port 12 are arrange | positioned coaxially in the vertical direction, the level | step-difference part 13 can be formed by changing the internal shape of the valve main body 10. FIG.

また、弁本体１０の上面開口１０ａと弁室２１との間には、弁棒３０を保持するべく上下方向に延びる案内孔１９が形成されている。弁棒３０は、弁口２２をその下側（すなわち、流出室２６側）から開閉すべく、上下方向に沿って案内孔１９に摺動自在に嵌挿されている。この弁棒３０は、主に、弁本体１０の前記案内孔１９に摺動自在に嵌挿され且つ弁口２２に挿通される弁軸３８と、弁軸３８の下端部に設けられて弁口２２をその下側から開閉するための弁体部３５とを有する。 A guide hole 19 extending in the vertical direction is formed between the upper surface opening 10 a of the valve body 10 and the valve chamber 21 so as to hold the valve rod 30. The valve rod 30 is slidably fitted into the guide hole 19 along the vertical direction in order to open and close the valve port 22 from the lower side (that is, the outflow chamber 26 side). This valve stem 30 is mainly provided in a valve shaft 38 that is slidably inserted into the guide hole 19 of the valve body 10 and is inserted into the valve port 22, and a valve port provided at the lower end of the valve shaft 38. And a valve body portion 35 for opening and closing 22 from the lower side.

弁軸３８は、上側から順に、ダイアフラム装置４０を支承するダイアフラム支承部３２、案内孔１９に摺動自在に嵌挿される摺動大径部３３、弁口２２に挿通されて流出室２６まで延びる挿通小径部３４を有するとともに、挿通小径部３４の略中間部外周から、弁体部３５のシール部材３５ａ（後述する）を上方から押さえる円錐状の上側押さえ部３６が突設されている。また、弁軸３８の中央には、上下方向に延びる貫通孔３１が形成されている。貫通孔３１の上端部及び下端部の周壁には、雌ねじ部３１ａ，３１ｂがそれぞれ螺設されている。摺動大径部３３の外周に設けられた環状溝に、案内孔１９との間に形成される摺動面間隙間をシールするべく、Ｏリング２８が装着されている。 The valve shaft 38 extends from the upper side to the outflow chamber 26 through the diaphragm support portion 32 for supporting the diaphragm device 40, the sliding large diameter portion 33 slidably inserted into the guide hole 19, and the valve port 22. While having the insertion small diameter part 34, the cone-shaped upper holding | suppressing part 36 which hold | suppresses the sealing member 35a (after-mentioned) of the valve body part 35 from upper direction protrudes from the substantially outer periphery of the insertion small diameter part 34 from the upper part. A through hole 31 extending in the vertical direction is formed at the center of the valve shaft 38. Female threaded portions 31 a and 31 b are respectively screwed on the peripheral walls of the upper end portion and the lower end portion of the through hole 31. An O-ring 28 is attached to an annular groove provided on the outer periphery of the sliding large-diameter portion 33 so as to seal a clearance between sliding surfaces formed between the guide hole 19 and the annular groove.

弁体部３５は、挿通小径部３４の下端部の外周に取り付けられ、挿通小径部３４の下端部に外挿される略円錐台状、且つ弁口２２より若干大径のシール部材３５ａと、挿通小径部３４の底部に固定されてシール部材３５ａを下側及び外周から押さえる有底円筒状の下側押さえ部材３５ｂとから構成されている。シール部材３５ａは、上述の上側押さえ部３６及び下側押さえ部材３５ｂに挟持されるようにして、貫通孔３１の下端部に設けられた雌ねじ部３１ｂに螺合される締結ねじ２７によって弁軸３８に固定されている。シール部材３５ａは、例えばゴムによって形成され、その外周面が弁座２３と接離することにより弁口２２を開閉する。 The valve body portion 35 is attached to the outer periphery of the lower end portion of the insertion small-diameter portion 34, has a substantially truncated cone shape that is extrapolated to the lower end portion of the insertion small-diameter portion 34, and a sealing member 35 a slightly larger in diameter than the valve port 22. It is comprised from the bottomed cylindrical lower side pressing member 35b fixed to the bottom part of the small diameter part 34, and pressing down the sealing member 35a from the lower side and outer periphery. The seal member 35a is clamped by the above-described upper pressing portion 36 and the lower pressing member 35b so that the valve shaft 38 is fastened by a fastening screw 27 that is screwed into a female screw portion 31b provided at the lower end portion of the through hole 31. It is fixed to. The seal member 35a is made of, for example, rubber, and opens and closes the valve port 22 when the outer peripheral surface thereof contacts and separates from the valve seat 23.

ダイアフラム装置４０は、二次側流出口１２の二次側圧力を感知して弁棒３０を上下方向に駆動すべく、弁本体１０の上面開口１０ａを塞ぐようにその上部に取り付けられている。 The diaphragm device 40 is attached to the upper portion of the valve body 10 so as to close the upper surface opening 10a in order to sense the secondary pressure of the secondary outlet 12 and drive the valve rod 30 in the vertical direction.

詳細には、ダイアフラム装置４０は、弁本体１０の上面開口１０ａを覆うように配在されたダイアフラム４１と、このダイアフラム４１の外周部を弁本体１０の上端に設けられたダイアフラム受け部１０ｃと協働してその下端面部４２ｂで挟圧封止する断面概略段付き釣鐘状のキャップ４２と、ダイアフラム４１とキャップ４２の上部との間に配在されてダイアフラム４１を下方に付勢する圧縮コイルばね４５と、雌ねじ部３１ａに螺合される締結ねじ２９が挿通される挿通孔４３ａを有し、前記圧縮コイルばね４５の下端を受け止めるべくダイアフラム４１の内周部上に載せられ、前記弁棒３０のダイアフラム支承部３２と協働してダイアフラム４１を挟持する断面概略逆ハット状の下側ばね受け部材４３と、圧縮コイルばね４５の上端を受け止める受け座４６ａが上端から外側へ突設された断面概略凹字状の上側ばね受け部材４６と、下端が上側ばね受け部材４６と当接され且つ上端に六角穴が形成された略円柱状の六角穴付き調節ねじ４７と、を備えている。このダイアフラム装置４０は、キャップ４２の下端面部４２ｂを複数本のボルト（図示せず）で弁本体１０のダイアフラム受け部１０ｃに締結固定することにより、弁本体１０に組み付けられている。 Specifically, the diaphragm device 40 cooperates with a diaphragm 41 disposed so as to cover the upper surface opening 10 a of the valve body 10, and a diaphragm receiving portion 10 c provided on the outer periphery of the diaphragm 41 at the upper end of the valve body 10. A bell-shaped cap 42 having a stepped cross section that is pressed and sealed at the lower end surface portion 42b, and a compression coil spring that is arranged between the diaphragm 41 and the upper portion of the cap 42 and biases the diaphragm 41 downward. 45 and an insertion hole 43a through which a fastening screw 29 screwed into the female thread portion 31a is inserted, and is placed on the inner peripheral portion of the diaphragm 41 to receive the lower end of the compression coil spring 45. The lower spring receiving member 43 having a generally inverted cross-sectional shape that holds the diaphragm 41 in cooperation with the diaphragm support portion 32 and the upper end of the compression coil spring 45 An upper spring receiving member 46 having a generally concave shape in cross section, in which a receiving seat 46a projecting outward from the upper end, and a substantially cylindrical shape in which a lower end is in contact with the upper spring receiving member 46 and a hexagonal hole is formed at the upper end. The hexagon socket head adjusting screw 47 is provided. The diaphragm device 40 is assembled to the valve body 10 by fastening and fixing the lower end surface portion 42b of the cap 42 to the diaphragm receiving portion 10c of the valve body 10 with a plurality of bolts (not shown).

ダイアフラム装置４０では、圧縮コイルばね４５のセット荷重調節に供するべく、前記キャップ４２の上部口筒部４２ａの内周に雌ねじ部４２ｃが形成され、その雌ねじ部４２ｃと六角穴付き調節ねじ４７の外周に設けられた雄ねじ部４７ａとが螺合されている。調節ねじ４７を回動させると、下側ばね受け部材４３と上側ばね受け部材４６との間に縮装された圧縮コイルばね４５のセット荷重が調節される。これによって、ダイアフラム装置４０の開弁時の圧力が調節される。 In the diaphragm device 40, in order to adjust the set load of the compression coil spring 45, a female screw portion 42c is formed on the inner periphery of the upper mouth tube portion 42a of the cap 42, and the outer periphery of the female screw portion 42c and the hexagonal hole adjusting screw 47 is formed. And a male threaded portion 47a provided on the screw. When the adjusting screw 47 is rotated, the set load of the compression coil spring 45 that is compressed between the lower spring receiving member 43 and the upper spring receiving member 46 is adjusted. Thereby, the pressure when the diaphragm device 40 is opened is adjusted.

前記ダイアフラム４１と弁軸３８のダイアフラム支承部３２の上面との間には、感圧室２４が画成されている。また、図示しないが、前記弁本体１０における二次側流出口１２側の周側部に、後述する逃がし弁５０との干渉を回避するように、前記感圧室２４に連なる縦穴からなる感圧通路が形成されている。二次側流出口１２の二次側圧力が、前記感圧通路及び感圧室２４を介して感圧応動部材としてのダイアフラム装置４０に感知されることで、ダイアフラム装置４０のダイアフラム４１に連結された弁棒３０が弁本体１０内で上下方向に駆動される。 A pressure sensitive chamber 24 is defined between the diaphragm 41 and the upper surface of the diaphragm support portion 32 of the valve shaft 38. In addition, although not shown in the drawing, a pressure-sensitive pressure comprising a vertical hole connected to the pressure-sensitive chamber 24 at the peripheral side of the valve body 10 on the secondary outlet 12 side so as to avoid interference with a later-described relief valve 50. A passage is formed. The secondary side pressure of the secondary side outlet 12 is detected by the diaphragm device 40 as a pressure sensitive response member via the pressure sensitive passage and the pressure sensitive chamber 24, so that it is connected to the diaphragm 41 of the diaphragm device 40. The valve stem 30 is driven in the vertical direction within the valve body 10.

弁本体１０の下面開口１０ｂを下方から閉塞する底蓋部材６０は、円板状の基部６１を有し、該基部６１の上面に、弁棒３０の弁軸３８の下端に締結された締結ねじ２７との干渉を避けるべく椀状の凹部６３が設けられ、凹部６３を取り囲むように基部６１の上面から略円環状のストッパ部６２が立設されている。また、基部６１の外周に設けられた環状溝には、シール材としてのＯリング６４が装着されている。 The bottom cover member 60 that closes the lower surface opening 10b of the valve body 10 from below has a disk-like base 61, and is a fastening screw fastened to the lower end of the valve shaft 38 of the valve stem 30 on the upper surface of the base 61. In order to avoid interference with 27, a bowl-shaped recess 63 is provided, and a substantially annular stopper 62 is erected from the upper surface of the base 61 so as to surround the recess 63. Further, an O-ring 64 as a sealing material is attached to the annular groove provided on the outer periphery of the base 61.

底蓋部材６０の基部６１は、複数のボルト６５によって弁本体１０と締結固定されている。基部６１に設けられたストッパ部６２は、弁棒３０の下動規制を行うための構造であり、弁口２２を開弁して弁棒３０が降下するときに、弁体部３５の下側押さえ部材３５ｂがストッパ部６２と当接し、弁棒３０がこれ以上降下することができない。また、当接時に弁棒３０の下側押さえ部材３５ｂとの貼り付きを防止するため、当該ストッパ部６２には、その円周方向に沿って複数の切り欠き（図示例では、紙面に対して前後左右４箇所の位置に切り欠き）が設けられている。 The base 61 of the bottom cover member 60 is fastened and fixed to the valve body 10 by a plurality of bolts 65. The stopper portion 62 provided on the base portion 61 is a structure for restricting the downward movement of the valve stem 30, and when the valve stem 30 is lowered when the valve port 22 is opened, the lower side of the valve body portion 35 is provided. The pressing member 35b comes into contact with the stopper portion 62, and the valve stem 30 cannot be lowered any further. Further, in order to prevent sticking to the lower pressing member 35b of the valve rod 30 at the time of contact, the stopper portion 62 has a plurality of notches (in the illustrated example, with respect to the paper surface). Cutouts are provided at four positions on the front, rear, left and right.

本実施形態の減圧弁１において、樹脂製の弁本体１０及び他の構成部品等を異常な高圧から守るために、一次側圧力が所定値（弁本体１０及び他の構成部品等の耐圧限界値）を超えたときに開く逃がし弁５０が前記段差部１３に設けられている。 In the pressure reducing valve 1 of the present embodiment, in order to protect the resin valve body 10 and other components from abnormally high pressure, the primary pressure is a predetermined value (the pressure limit value of the valve body 10 and other components). ) Is provided in the step portion 13 so as to open when the pressure exceeds.

図２は図１中の逃がし弁部分を示す拡大断面図であり、図３は逃がし弁部分を示す分解斜視図である。逃がし弁５０は、図２及び図３に示す左側から順に、弁室２１に開口するオリフィスからなる逃がし弁口５１、該逃がし弁口５１と連通するとともに二次側流出口１２に開口する段付き円筒状空所からなる収納穴５７とを有する。収納穴５７は、更に、逃がし弁口５１に連通する円筒状空所からなる第１収納穴５２と、二次側流出口１２に開口するとともに第１収納穴５２より大径の第２収納穴５３ａとから構成されている。そして、逃がし弁口５１、第１収納穴５２及び第２収納穴５３ａは、それぞれ横向きに形成され、左側から右側に向かって段差を有するように同軸上に配置されている。 2 is an enlarged cross-sectional view showing the relief valve portion in FIG. 1, and FIG. 3 is an exploded perspective view showing the relief valve portion. The relief valve 50 is provided with a relief valve port 51 comprising an orifice that opens to the valve chamber 21 in order from the left side shown in FIGS. 2 and 3, and a step that communicates with the relief valve port 51 and opens to the secondary outlet 12. And a storage hole 57 made of a cylindrical void. The storage hole 57 further includes a first storage hole 52 formed of a cylindrical space that communicates with the relief valve port 51, and a second storage hole that opens to the secondary side outlet 12 and has a larger diameter than the first storage hole 52. 53a. And the relief valve port 51, the 1st accommodation hole 52, and the 2nd accommodation hole 53a are each formed laterally, and are arrange | positioned coaxially so that it may have a level | step difference toward the right side from the left side.

詳しくは、第１収納穴５２は、内径が逃がし弁口５１よりも大きく形成され、その内部に、逃がし弁口５１を開閉するゴム製のボール型の弁体（以下、ボール弁体と称する）５５と、該ボール弁体５５を閉弁方向に付勢する圧縮コイルばねからなる閉弁ばね５６とが収納されている。該第１収納穴５２より大径の第２収納穴５３ａは、第１収納穴５２の二次側流出口１２側（に設けられた装着穴５８）に固定された円筒状部材（筒状部材）５３の貫通孔によって形成され、その一端が第１収納穴５２と連通して、他端が二次側流出口１２に開口する。 Specifically, the first storage hole 52 has an inner diameter larger than that of the relief valve port 51, and a rubber ball-type valve body that opens and closes the relief valve port 51 (hereinafter referred to as a ball valve body). 55 and a valve closing spring 56 formed of a compression coil spring that urges the ball valve body 55 in the valve closing direction are housed. The second storage hole 53 a having a diameter larger than that of the first storage hole 52 is a cylindrical member (tubular member) fixed to the secondary outlet 12 side of the first storage hole 52 (the mounting hole 58 provided in the second storage hole 53 a). ) 53, one end of which communicates with the first storage hole 52, and the other end opens to the secondary outlet 12.

より詳しくは、弁本体１０の段差部１３には、第１収納穴５２と連通するとともに、第１収納穴５２及び第２収納穴５３ａのいずれより大径の装着穴５８が設けられている。装着穴５８における逃がし弁口５１側の外周には、二次側流出口１２側に開口する環状溝５８ａが形成されている。該装着穴５８に、前記円筒状部材５３はその一部が装着穴５８に内挿され、残りが装着穴５８の外部（二次側流出口１２側）に露出した状態で、超音波溶着で固着されている。 More specifically, the stepped portion 13 of the valve body 10 is provided with a mounting hole 58 that communicates with the first storage hole 52 and has a larger diameter than either the first storage hole 52 or the second storage hole 53a. An annular groove 58a that opens to the secondary outlet 12 side is formed on the outer periphery of the relief hole 51 side in the mounting hole 58. A part of the cylindrical member 53 is inserted into the mounting hole 58 in the mounting hole 58, and the remaining part is exposed to the outside of the mounting hole 58 (secondary outlet 12 side). It is fixed.

図４は前記円筒状部材を示す斜視図である。図３及び図４に示すように、円筒状部材５３の内部中央には、前記第２収納穴５３ａを形成する貫通孔が形成されている。この第２収納穴５３ａは、断面円形であり、ボール弁体５５及び閉弁ばね５６を挿通可能な大きさを有する。第２収納穴５３ａの二次側流出口１２側端部の内壁面には、該内壁面から突出する一対の突起部５３ｂが設けられている。この一対の突起部５３ｂは、第２収納穴５３ａの周方向に沿って１８０°の間隔で配置され、すなわち互いに対向するように配置されている。 FIG. 4 is a perspective view showing the cylindrical member. As shown in FIGS. 3 and 4, a through hole that forms the second storage hole 53 a is formed in the center of the cylindrical member 53. The second storage hole 53 a has a circular cross section and has a size that allows the ball valve body 55 and the valve closing spring 56 to be inserted therethrough. A pair of projecting portions 53b projecting from the inner wall surface are provided on the inner wall surface of the second storage hole 53a at the end on the secondary outlet 12 side. The pair of protrusions 53b are arranged at an interval of 180 ° along the circumferential direction of the second storage hole 53a, that is, arranged so as to face each other.

一方、円筒状部材５３における突起部５３ｂが形成された端部とは反対側の端部には、内径が第２収納穴５３ａの内径よりも大きい円環状の溶着部５３ｃが設けられている。この溶着部５３ｃは、装着穴５８の環状溝５８ａに嵌め込まれ、超音波溶着によってその樹脂材料が瞬時に溶融して、装着穴５８が設けられた段差部１３に接合される。これによって、該円筒状部材５３は弁本体１０と一体とされている。 On the other hand, an annular weld 53c having an inner diameter larger than the inner diameter of the second storage hole 53a is provided at the end of the cylindrical member 53 opposite to the end where the projection 53b is formed. The welded portion 53c is fitted into the annular groove 58a of the mounting hole 58, and the resin material is instantaneously melted by ultrasonic welding and joined to the stepped portion 13 provided with the mounting hole 58. Thus, the cylindrical member 53 is integrated with the valve body 10.

図２に示すように、第２収納穴５３ａの内径が第１収納穴５２より大きいため、第１収納穴５２と第２収納穴５３ａとの間には段差部が形成され、該段差部は、ばね受け蓋５４の収納穴５７への挿入時に、ばね受け蓋５４の逃がし弁口５１側への移動を阻止するストッパ部６７としての役割を果たす（後で詳述）。 As shown in FIG. 2, since the inner diameter of the second storage hole 53a is larger than the first storage hole 52, a step portion is formed between the first storage hole 52 and the second storage hole 53a. When the spring receiving lid 54 is inserted into the storage hole 57, it serves as a stopper portion 67 that prevents the spring receiving lid 54 from moving toward the relief valve port 51 (details will be described later).

収納穴５７における第２収納穴５３ａの内部には、閉弁ばね５６を圧縮状態で保持するばね受け蓋５４が係合固定されている。図５はばね受け蓋を示す斜視図である。ばね受け蓋５４は、収納穴５７内に、軸線Ｏ方向に沿って移動可能且つ軸線Ｏ回りに回転可能に配在されている。具体的には、このばね受け蓋５４は、第１収納穴５２に内挿される大きさ（すなわち、第１収納穴５２より若干小径）の左側（逃がし弁口５１側）小径部６６と、第１収納穴５２より若干大径の右側（二次側流出口１２側）大径部５９とを有する。 A spring receiving lid 54 that holds the valve closing spring 56 in a compressed state is engaged and fixed inside the second storage hole 53 a in the storage hole 57. FIG. 5 is a perspective view showing the spring receiving cover. The spring receiving lid 54 is disposed in the storage hole 57 so as to be movable along the direction of the axis O and rotatable about the axis O. Specifically, the spring receiving lid 54 has a small-diameter portion 66 on the left side (relief valve port 51 side) of a size (that is, slightly smaller in diameter than the first storage hole 52) inserted into the first storage hole 52, and It has a right-side (secondary outlet 12 side) large-diameter portion 59 slightly larger in diameter than the one storage hole 52.

左側小径部６６は、円筒状を呈し、ばね受け蓋５４全体長さの約半分の長さを有する。この左側小径部６６は、ばね受け蓋５４を収納穴５７内に挿入する際に、第１収納穴５２に挿入されながら（後で詳述）、閉弁ばね５６の先端部と当接して該閉弁ばね５６をボール弁体５５側に押し付けて圧縮する役割を果たす。また、左側小径部６６と右側大径部５９との外径の違いによって、両者の間に段差部５９ｇが形成されている。この段差部５９ｇが、第１収納穴５２と第２収納穴５３ａとの間に形成された前記ストッパ部６７に対接せしめられる。 The left small diameter portion 66 has a cylindrical shape, and has a length that is approximately half of the entire length of the spring receiving lid 54. When the spring receiving lid 54 is inserted into the storage hole 57, the left small diameter portion 66 is in contact with the tip of the valve closing spring 56 while being inserted into the first storage hole 52 (described in detail later). The valve closing spring 56 is pressed against the ball valve body 55 to compress it. Further, due to the difference in outer diameter between the left small diameter portion 66 and the right large diameter portion 59, a stepped portion 59g is formed between them. The stepped portion 59g is brought into contact with the stopper portion 67 formed between the first storage hole 52 and the second storage hole 53a.

右側大径部５９は、左側小径部６６と一体的に形成され、第２収納穴５３ａに内接するように、その外径が第２収納穴５３ａの内径とほぼ同じ、もしくはその内径よりも僅かに小さくなっている。また、右側大径部５９は、円筒状部材５３の突起部５３ｂの形状に合わせて、その外周に突起部５３ｂとの干渉を回避するための逃げ溝５９ａと、突起部５３ｂと係合可能な係合窪み５９ｂとがそれぞれ複数個(本実施形態では、２箇所ずつ)設けられている。本実施形態では、これらの逃げ溝５９ａ及び係合窪み５９ｂは、第２収納穴５３ａの周方向に沿って９０°の間隔で交互に配置されている。 The right large-diameter portion 59 is formed integrally with the left small-diameter portion 66, and its outer diameter is substantially the same as or slightly smaller than the inner diameter of the second storage hole 53a so as to be inscribed in the second storage hole 53a. It is getting smaller. The right large diameter portion 59 is engageable with the protrusion 53b and a clearance groove 59a for avoiding interference with the protrusion 53b on the outer periphery according to the shape of the protrusion 53b of the cylindrical member 53. A plurality of engagement recesses 59b are provided (two in this embodiment). In the present embodiment, the escape grooves 59a and the engagement recesses 59b are alternately arranged at 90 ° intervals along the circumferential direction of the second storage hole 53a.

逃げ溝５９ａは、円筒状部材５３への挿入方向（すなわち、軸線Ｏ方向）に沿ってばね受け蓋５４の右側大径部５９の外周に設けられている。一方、係合窪み５９ｂは、右側大径部５９の二次側流出口１２側の先端面５９ｃから上述の挿入方向に沿って所定の範囲にわたって（ここでは、突起部５３ｂとほぼ同じ深さとなるように）形成されている。 The escape groove 59a is provided on the outer periphery of the right-side large-diameter portion 59 of the spring receiving lid 54 along the direction of insertion into the cylindrical member 53 (that is, the direction of the axis O). On the other hand, the engagement recess 59b extends over a predetermined range along the above-described insertion direction from the distal end surface 59c of the right large diameter portion 59 on the secondary outlet 12 side (here, substantially the same depth as the protrusion 53b). Is formed).

ばね受け蓋５４を収納穴５７に挿入する際に、該第２収納穴５３ａ及び第１収納穴５２内部の空気を逃がすべく、右側大径部５９の外周には、係合窪み５９ｂと連通するように空気逃げ溝部（空気逃げ通路）５９ｄが設けられている。このようにすることで、円筒状部材５３とばね受け蓋５４とが密接する状態においても、収納穴５７へのばね受け蓋５４の挿入作業をよりスムーズに行える。 When the spring receiving lid 54 is inserted into the storage hole 57, the outer periphery of the right large-diameter portion 59 communicates with the engagement recess 59b so as to allow air inside the second storage hole 53a and the first storage hole 52 to escape. Thus, an air escape groove (air escape passage) 59d is provided. By doing so, even when the cylindrical member 53 and the spring receiving cover 54 are in close contact with each other, the operation of inserting the spring receiving cover 54 into the storage hole 57 can be performed more smoothly.

更に、ばね受け蓋５４の右側大径部５９には、収納穴５７内での周方向への回転に伴って円筒状部材５３の突起部５３ｂと当接して当該ばね受け蓋５４の回転を規制する回転規制部５９ｅが設けられている。回転規制部５９ｅは、隣接する逃げ溝５９ａと係合窪み５９ｂとの間に位置し、先端面５９ｃから二次側流出口１２側に突出している。本実施形態において、回転規制部５９ｅは１箇所のみ形成されているが、必要に応じて２箇所以上に形成しても良い。なお、ばね受け蓋５４の係合窪み５９ｂが円筒状部材５３の突起部５３ｂと係合する際に、突起部５３ｂが係合窪み５９ｂ内に嵌め込まれることにより、両者間の相対的回転も規定できるので、回転規制部５９ｅを必ずしも設ける必要はない。 Further, the large-diameter portion 59 on the right side of the spring receiving lid 54 abuts against the protrusion 53 b of the cylindrical member 53 as the circumferential rotation in the accommodation hole 57 and restricts the rotation of the spring receiving lid 54. A rotation restricting portion 59e is provided. The rotation restricting portion 59e is located between the adjacent escape groove 59a and the engagement recess 59b, and protrudes from the front end surface 59c to the secondary side outlet 12 side. In the present embodiment, the rotation restricting portion 59e is formed only at one place, but may be formed at two or more places as necessary. When the engagement recess 59b of the spring receiving lid 54 engages with the projection 53b of the cylindrical member 53, the projection 53b is fitted into the engagement recess 59b, so that relative rotation between the two is also defined. Therefore, the rotation restricting portion 59e is not necessarily provided.

ばね受け蓋５４の内部中央には、円筒状部材５３への挿入方向（すなわち、軸線Ｏ方向）に沿う貫通孔５４ａが設けられている（図２参照）。この貫通孔５４ａは、第１収納穴５２内部の空気や開弁時の一次側圧力を二次側流出口１２側に逃がすために設けられたものである。例えば、上述の空気逃げ溝部５９ｄを設けた場合には、該貫通孔５４ａを省いても良い。 A through hole 54a is provided in the center of the spring receiving lid 54 along the direction of insertion into the cylindrical member 53 (that is, the direction of the axis O) (see FIG. 2). The through hole 54a is provided for releasing the air inside the first storage hole 52 and the primary pressure when the valve is opened to the secondary outlet 12 side. For example, when the air escape groove 59d described above is provided, the through hole 54a may be omitted.

貫通孔５４ａは、段付き構造になっており、第１収納穴５２側寄りの部分が小径の断面円形部で、二次側流出口１２側寄りの部分が大径の断面非円形部である。そして、大径の断面非円形部は工具挿入孔５９ｆとなっている。工具挿入孔５９ｆは、ばね受け蓋５４を回転させるための構造であり、ばね受け蓋５４の二次側流出口１２側の端面（すなわち、貫通孔５４ａの先端面５９ｃ）から貫通孔５４ａの長さの約半分まで延びている。本実施形態において、工具挿入孔５９ｆは、断面六角形状となっているが、六角形状以外の多角形状ないし楕円形状等の非円形状であっても良い。 The through hole 54a has a stepped structure, a portion near the first storage hole 52 is a small-diameter cross-sectional circular portion, and a portion near the secondary outlet 12 is a large-diameter cross-sectional non-circular portion. . The large-diameter non-circular cross section is a tool insertion hole 59f. The tool insertion hole 59f is a structure for rotating the spring receiving cover 54, and the length of the through hole 54a from the end surface on the secondary outlet 12 side of the spring receiving cover 54 (that is, the front end surface 59c of the through hole 54a). It extends to about half the length. In the present embodiment, the tool insertion hole 59f has a hexagonal cross section, but may have a noncircular shape such as a polygonal shape or an elliptical shape other than the hexagonal shape.

このように工具挿入孔５９ｆを設けることで、ばね受け蓋５４を収納穴５７内部に挿入した後に、例えば六角レンチ等で該ばね受け蓋５４を容易に回転させることができる。なお、ばね受け蓋５４の貫通孔５４ａに代えて、ばね受け蓋５４の二次側流出口側の端面である先端面５９ｃに（貫通しない）断面非円形状の凹状窪みを設けても良い。 By providing the tool insertion hole 59f in this way, the spring receiving cover 54 can be easily rotated with, for example, a hexagon wrench after the spring receiving cover 54 is inserted into the storage hole 57. Instead of the through hole 54a of the spring receiving lid 54, a concave recess having a non-circular cross section (not penetrating) may be provided on the distal end surface 59c which is the end face on the secondary outlet side of the spring receiving lid 54.

逃がし弁５０は、例えば図６〜図８に示す手順で組み立てることができる。なお、逃がし弁５０の組立作業は専用の治具又は工具などを用いて行われるが、ここでは治具又は工具を省略する。 The relief valve 50 can be assembled, for example, according to the procedure shown in FIGS. The assembly work of the relief valve 50 is performed using a dedicated jig or tool, but the jig or tool is omitted here.

逃がし弁５０の組み立ての前工程として、まず、円筒状部材５３を弁本体１０と一体化させる。具体的には、円筒状部材５３の溶着部５３ｃを環状溝５８ａに嵌め込むように該円筒状部材５３を装着穴５８に挿入（内挿）し、超音波溶着で円筒状部材５３を装着穴５８に固着させる。 As a pre-process for assembling the relief valve 50, first, the cylindrical member 53 is integrated with the valve body 10. Specifically, the cylindrical member 53 is inserted (inserted) into the mounting hole 58 so that the welded portion 53c of the cylindrical member 53 is fitted into the annular groove 58a, and the cylindrical member 53 is attached to the mounting hole by ultrasonic welding. 58 is fixed.

次に、逃がし弁５０を組み立てる。具体的には、まず、円筒状部材５３の第２収納穴５３ａ（貫通孔）を介して、第１収納穴５２の内部に順にボール弁体５５と閉弁ばね５６とを挿入する。その後、図６に示すようにばね受け蓋５４の左側小径部６６が円筒状部材５３側に向いた状態で逃げ溝５９ａと円筒状部材５３の突起部５３ｂとの位置合わせを行いながら、ばね受け蓋５４を円筒状部材５３の収納穴５７の内部に挿入する。 Next, the relief valve 50 is assembled. Specifically, first, the ball valve body 55 and the valve closing spring 56 are sequentially inserted into the first storage hole 52 through the second storage hole 53 a (through hole) of the cylindrical member 53. Thereafter, as shown in FIG. 6, the spring receiver 54 is aligned with the escape groove 59a and the protrusion 53b of the cylindrical member 53 while the left small diameter portion 66 of the spring receiving lid 54 faces the cylindrical member 53 side. The lid 54 is inserted into the storage hole 57 of the cylindrical member 53.

収納穴５７への挿入時、図６（ａ）に示すように、逃げ溝５９ａが円筒状部材５３の突起部５３ｂと位置合わせているため、ばね受け蓋５４は突起部５３ｂと干渉せずに挿入される。そして、収納穴５７内部への進入に従い、ばね受け蓋５４の左側小径部６６が閉弁ばね５６の先端部と当接する。このとき、閉弁ばね５６の付勢力に抗して該閉弁ばね５６をボール弁体５５に押し付けるように外力を加えて、ばね受け蓋５４の左側小径部６６を第１収納穴５２に内挿させるようにして、該ばね受け蓋５４を挿入し続ける。 When inserted into the storage hole 57, as shown in FIG. 6A, the escape groove 59a is aligned with the projection 53b of the cylindrical member 53, so that the spring receiving lid 54 does not interfere with the projection 53b. Inserted. Then, the left small diameter portion 66 of the spring receiving lid 54 comes into contact with the distal end portion of the valve closing spring 56 as it enters the storage hole 57. At this time, an external force is applied so as to press the valve closing spring 56 against the ball valve body 55 against the urging force of the valve closing spring 56, so that the left small diameter portion 66 of the spring receiving lid 54 is inserted into the first storage hole 52. The spring receiving cover 54 is continuously inserted as if inserted.

ばね受け蓋５４の収納穴５７への挿入作業は、左側小径部６６と右側大径部５９との間に形成された段差部５９ｇが第１収納穴５２と第２収納穴５３ａとの間に形成されたストッパ部６７と当接するまで行われる。本実施形態では、段差部５９ｇがストッパ部６７と当接した状態で、挿入方向におけるばね受け蓋５４の係合窪み５９ｂの位置が、円筒状部材５３の突起部５３ｂよりも第１収納穴５２側になるように設定されている。従って、ばね受け蓋５４の左側小径部６６が第１収納穴５２内に内挿され、段差部５９ｇがストッパ部６７と当接した際に、係合窪み５９ｂが突起部５３ｂの位置を超えて第１収納穴５２側に位置することになる（図７参照）。 The step of inserting the spring receiving lid 54 into the storage hole 57 includes a step 59g formed between the left small diameter portion 66 and the right large diameter portion 59 between the first storage hole 52 and the second storage hole 53a. This is performed until the formed stopper portion 67 comes into contact. In the present embodiment, the position of the engagement recess 59b of the spring receiving lid 54 in the insertion direction is greater than the protrusion 53b of the cylindrical member 53 in the first contact hole 52 in a state where the stepped portion 59g is in contact with the stopper portion 67. It is set to be on the side. Therefore, when the left small diameter portion 66 of the spring receiving lid 54 is inserted into the first storage hole 52 and the stepped portion 59g contacts the stopper portion 67, the engagement recess 59b exceeds the position of the projection 53b. It will be located in the 1st accommodation hole 52 side (refer FIG. 7).

続いて、図７の矢印Ｆに示すように、挿入方向へ外力を加えて段差部５９ｇをストッパ部６７に当接させたまま、ばね受け蓋５４を反時計回りに約９０°回転させる。ばね受け蓋５４の回転に伴い、ばね受け蓋５４の回転規制部５９ｅ（の側面）が円筒状部材５３の突起部５３ｂ（の側面）と当接し、ばね受け蓋５４のこれ以上の回転ができなくなる。この状態において、ばね受け蓋５４を挿入するための外力が解除されると、閉弁ばね５６の反発力によってばね受け蓋５４が右方へ移動せしめられ、係合窪み５９ｂに突起部５３ｂがはまり込み、係合窪み５９ｂが突起部５３ｂと当接し係合する。これによって、閉弁ばね５６の反発力によるばね受け蓋５４の二次側流出口１２側への移動が阻止されるとともに、ばね受け蓋５４は円筒状部材５３に係合固定される（図８参照）。以上より、逃がし弁５０の組立作業が完了する。なお、逃がし弁５０を取り外す場合には、上述の内容と逆の手順で行えば良い。 Subsequently, as shown by an arrow F in FIG. 7, the spring receiving lid 54 is rotated about 90 ° counterclockwise while applying an external force in the insertion direction and keeping the stepped portion 59 g in contact with the stopper portion 67. As the spring receiving cover 54 rotates, the rotation restricting portion 59e (the side surface) of the spring receiving cover 54 comes into contact with the projection 53b (the side surface) of the cylindrical member 53, and the spring receiving cover 54 can rotate further. Disappear. In this state, when the external force for inserting the spring receiving cover 54 is released, the spring receiving cover 54 is moved to the right by the repulsive force of the valve closing spring 56, and the protrusion 53b fits into the engagement recess 59b. The engaging recess 59b comes into contact with and engages with the protrusion 53b. As a result, the spring receiving cover 54 is prevented from moving toward the secondary outlet 12 by the repulsive force of the valve closing spring 56, and the spring receiving cover 54 is engaged and fixed to the cylindrical member 53 (FIG. 8). reference). Thus, the assembly operation of the relief valve 50 is completed. In addition, what is necessary is just to perform in the reverse procedure to the above-mentioned content, when removing the relief valve 50. FIG.

このような構造を有する逃がし弁５０では、一次側圧力が所定値を超えると、ボール弁体５５に働く開弁方向の力が閉弁ばね５６の閉弁方向の付勢力に打ち勝ち、逃がし弁５０が開弁し、一次側流入口１１と二次側流出口１２とが連通することになる。従って、一次側圧力が弁室２１→逃がし弁口５１→第１収納穴５２→ばね受け蓋５４の貫通孔５４ａを経て、二次側流出口１２側に流れる。これによって、一次側圧力が低減される。 In the relief valve 50 having such a structure, when the primary pressure exceeds a predetermined value, the force in the valve opening direction acting on the ball valve body 55 overcomes the urging force in the valve closing direction of the valve closing spring 56, and the relief valve 50. Is opened, and the primary inlet 11 and the secondary outlet 12 communicate with each other. Accordingly, the primary pressure flows to the secondary outlet 12 side through the valve chamber 21 → the relief valve port 51 → the first storage hole 52 → the through hole 54 a of the spring receiving lid 54. Thereby, the primary pressure is reduced.

本実施形態の減圧弁１では、弁本体１０に装着された円筒状部材５３が内部にボール弁体５５及び閉弁ばね５６を挿通する第２収納穴５３ａを有し、閉弁ばね５６を圧縮状態で保持するばね受け蓋５４が、当該ばね受け蓋５４に設けられた係合窪み５９ｂと円筒状部材５３の突起部５３ｂとの係合によって円筒状部材５３（つまり、弁本体１０）に固定されている。具体的には、上述のように先に超音波溶着で円筒状部材５３を弁本体１０の装着穴５８に固定させ、その第２収納穴５３ａを介してボール弁体５５及び閉弁ばね５６を収納穴５７（の第１収納穴５２）の内部に挿入した後に、ばね受け蓋５４を収納穴５７に挿入及び回転して円筒状部材５３に固定させる。このため、逃がし弁５０を容易に組み立てることができ、組立作業性の向上を図ることができる。 In the pressure reducing valve 1 of the present embodiment, the cylindrical member 53 attached to the valve body 10 has a second storage hole 53a through which the ball valve body 55 and the valve closing spring 56 are inserted, and compresses the valve closing spring 56. The spring receiving lid 54 held in the state is fixed to the cylindrical member 53 (that is, the valve body 10) by the engagement between the engagement recess 59b provided in the spring receiving lid 54 and the projection 53b of the cylindrical member 53. Has been. Specifically, as described above, the cylindrical member 53 is first fixed to the mounting hole 58 of the valve body 10 by ultrasonic welding, and the ball valve body 55 and the valve closing spring 56 are connected via the second storage hole 53a. After being inserted into the storage hole 57 (the first storage hole 52 thereof), the spring receiving lid 54 is inserted into the storage hole 57 and rotated to be fixed to the cylindrical member 53. For this reason, the relief valve 50 can be easily assembled, and the assembly workability can be improved.

しかも、ばね受け蓋５４が収納穴５７に挿入された後に、当該収納穴５７に対する相対回転で弁本体１０（円筒状部材５３）に固定されるので、従来のように超音波溶着でばね受け蓋を固定する必要がない。その結果、逃がし弁組立時の超音波溶着による振動の影響を防止することができ、想定した閉弁ばね５６の取付長を得られるので制御性を確実に確保することができる。 In addition, since the spring receiving cover 54 is inserted into the receiving hole 57 and is fixed to the valve body 10 (cylindrical member 53) by relative rotation with respect to the receiving hole 57, the spring receiving cover is conventionally ultrasonically welded. There is no need to fix. As a result, the influence of vibration due to ultrasonic welding at the time of assembly of the relief valve can be prevented, and the assumed mounting length of the valve closing spring 56 can be obtained, so that controllability can be reliably ensured.

更に、第２収納穴５３ａにおける二次側流出口１２側端部の内壁面に突起部５３ｂと、ばね受け蓋５４の右側大径部５９の外周に前記突起部５３ｂと係合可能な係合窪み５９ｂとがそれぞれ設けられているので、この突起部５３ｂと係合窪み５９ｂとからなる係合構造を利用してばね受け蓋５４を容易に弁本体１０（円筒状部材５３）に固定させることができる。その結果、従来と比べて逃がし弁５０の組立作業を容易になる。 Further, the protrusion 53b is formed on the inner wall surface of the second storage hole 53a at the end on the secondary outlet 12 side, and the protrusion 53b is engaged with the outer periphery of the right large diameter portion 59 of the spring receiving lid 54. Since the depressions 59b are provided, the spring receiving lid 54 can be easily fixed to the valve body 10 (cylindrical member 53) using the engagement structure formed by the protrusions 53b and the engagement depressions 59b. Can do. As a result, the assembly work of the relief valve 50 is facilitated as compared with the conventional case.

また、ばね受け蓋５４を収納穴５７の内部に挿入するときに、左側小径部６６と右側大径部５９との間に形成された段差部５９ｇを第１収納穴５２と第２収納穴５３ａとの間に形成されたストッパ部６７と当接させることにより、ばね受け蓋５４の収納穴５７への更なる挿入が阻止されるので、組立作業をより容易に行うことができる。 Further, when the spring receiving lid 54 is inserted into the storage hole 57, the step 59g formed between the left small diameter part 66 and the right large diameter part 59 is formed in the first storage hole 52 and the second storage hole 53a. Since the further insertion into the accommodation hole 57 of the spring receiving cover 54 is prevented, the assembling work can be performed more easily.

更に、ばね受け蓋５４の右側大径部５９に、収納穴５７内でのばね受け蓋５４の回転に伴って突起部５３ｂに当接してばね受け蓋５４の回転を規制する回転規制部５９ｅが設けられているので、収納穴５７に対するばね受け蓋５４の位置決め、突起部５３ｂと係合窪み５９ｂとの位置決めを容易に行うことができる。 Furthermore, a rotation restricting portion 59e that abuts the protrusion 53b as the spring receiving lid 54 rotates in the accommodation hole 57 and restricts the rotation of the spring receiving lid 54 on the right large diameter portion 59 of the spring receiving lid 54. Since it is provided, the positioning of the spring receiving lid 54 with respect to the storage hole 57 and the positioning of the protrusion 53b and the engagement recess 59b can be easily performed.

更に、弁本体１０に設けられた装着穴５８に、第２収納穴５３ａを形成する貫通孔を有するとともに突起部５３ｂが設けられた円筒状部材５３が固定されているので、当該円筒状部材５３を別途加工して装着穴５８に固定することで弁本体１０に一体化することが可能になる。従って、例えば弁本体に直接突起部を設けた場合と比べて、突起部５３ｂの加工性を向上することができるとともに、製品としてのバリエーションを増やすことができる。 Further, since the cylindrical member 53 having a through hole forming the second storage hole 53a and having the protrusion 53b is fixed to the mounting hole 58 provided in the valve body 10, the cylindrical member 53 is fixed. Can be integrated into the valve body 10 by separately processing and fixing to the mounting hole 58. Therefore, for example, the processability of the protrusion 53b can be improved and variations as a product can be increased as compared with the case where the protrusion is directly provided on the valve body.

以上、本発明の実施形態について詳述したが、本発明は、上述の実施形態に限定されるものではなく、特許請求の範囲に記載された本発明の精神を逸脱しない範囲で、種々の設計変更を行うことができるものである。 Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed.

例えば、円筒状部材５３とばね受け蓋５４とを係合固定する形態としては、上述の内容のほか、例えば収納穴５７（の第２収納穴５３ａ）の内壁面に螺旋状の溝、ばね受け蓋５４の外周に上記溝と係合可能な突起部をそれぞれ設けても良い。また、円筒状部材５３を必ずしも設ける必要がなく、例えば第１収納穴５２の二次側流出口１２側端部の内壁面に係合窪み５９ｂと係合可能な突起部を直接設けても良い。 For example, as a form in which the cylindrical member 53 and the spring receiving cover 54 are engaged and fixed, in addition to the above-described contents, for example, a spiral groove or a spring holder is formed on the inner wall surface of the storage hole 57 (second storage hole 53a). Protrusions that can engage with the grooves may be provided on the outer periphery of the lid 54. In addition, the cylindrical member 53 is not necessarily provided. For example, a protrusion that can be engaged with the engagement recess 59b may be directly provided on the inner wall surface of the end of the first storage hole 52 on the secondary outlet 12 side. .

１減圧弁
１０弁本体
１１一次側流入口
１２二次側流出口
１３段差部
２１弁室
２２弁口
２３弁座
２６流出室
３０弁棒
３５弁体部
３６上側押さえ部
３７シール部材
３８弁軸
４０ダイアフラム装置
４１ダイアフラム
４２キャップ
４３下側ばね受け部材
４５圧縮コイルばね
４６上側ばね受け部材
４７調節ねじ
５０逃がし弁
５１逃がし弁口
５２第１収納穴
５３円筒状部材（筒状部材）
５３ａ第２収納穴
５３ｂ突起部
５３ｃ溶着部
５４ばね受け蓋
５４ａ貫通孔
５５ボール弁体
５６閉弁ばね
５７収納穴
５８装着穴
５９右側大径部
５９ａ逃げ溝
５９ｂ係合窪み
５９ｃ先端面
５９ｄ空気逃げ溝部（空気逃げ通路）
５９ｅ回転規制部
５９ｆ工具挿入孔
５９ｇ段差部
６０底蓋部材
６６左側小径部
６７ストッパ部 DESCRIPTION OF SYMBOLS 1 Pressure-reducing valve 10 Valve body 11 Primary side inlet 12 Secondary side outlet 13 Step part 21 Valve chamber 22 Valve port 23 Valve seat 26 Outlet chamber 30 Valve rod 35 Valve body part 36 Upper pressing part 37 Seal member 38 Valve shaft 40 Diaphragm device 41 Diaphragm 42 Cap 43 Lower spring receiving member 45 Compression coil spring 46 Upper spring receiving member 47 Adjustment screw 50 Relief valve 51 Relief valve port 52 First storage hole 53 Cylindrical member (tubular member)
53a Second storage hole 53b Protruding part 53c Welding part 54 Spring receiving lid 54a Through hole 55 Ball valve element 56 Valve closing spring 57 Storage hole 58 Mounting hole 59 Right-side large diameter part 59a Escape groove 59b Engagement recess 59c End face 59d Air escape Groove (air escape passage)
59e Rotation restricting portion 59f Tool insertion hole 59g Step portion 60 Bottom cover member 66 Left small diameter portion 67 Stopper portion

Claims

内部に弁口付き弁座を有する弁室が設けられるとともに、前記弁口の下側に流出室が設けられ、外周部に前記弁室に連なる一次側流入口と前記流出室に連なる二次側流出口とが設けられた弁本体と、前記弁口を開閉するべく前記弁本体に上下方向に摺動自在に嵌挿された弁棒と、前記二次側流出口の二次側圧力を感知して前記弁棒を上下方向に駆動すべく前記弁本体に取り付けられた感圧応動部材と、を備え、前記弁本体に、前記一次側流入口の一次側圧力が所定値を超えたとき、その一次側圧力を前記二次側流出口に逃がす逃がし弁が設けられた減圧弁であって、
前記逃がし弁は、前記弁室に開口する逃がし弁口と、前記逃がし弁口と連通するとともに前記二次側流出口に開口する筒状空所からなる収納穴とを有し、前記収納穴に、前記逃がし弁口を開閉する弁体と、該弁体を閉弁方向に付勢する閉弁ばねとが収納されるとともに、前記閉弁ばねを圧縮状態で保持するばね受け蓋が前記収納穴に対する相対回転により係合固定され、
前記収納穴に、前記閉弁ばねの付勢力による前記ばね受け蓋の前記二次側流出口側への移動を阻止する突起部が設けられ、前記ばね受け蓋における前記二次側流出口側の外周に、前記突起部と係合せしめられる係合窪みが設けられ、
前記ばね受け蓋が前記収納穴に内接せしめられるとともに、前記ばね受け蓋の外周に、前記係合窪みに連なる空気逃げ通路が設けられていることを特徴とする減圧弁。 A valve chamber having a valve seat with a valve port is provided therein, an outflow chamber is provided below the valve port, and a primary side inflow port connected to the valve chamber on an outer peripheral portion and a secondary side connected to the outflow chamber A valve body provided with an outlet, a valve rod slidably inserted in the valve body to open and close the valve opening, and a secondary pressure of the secondary outlet And a pressure sensitive response member attached to the valve body to drive the valve stem in the vertical direction, and when the primary side pressure of the primary side inlet exceeds a predetermined value in the valve body, A pressure reducing valve provided with a relief valve for releasing the primary pressure to the secondary outlet,
The relief valve has a relief valve port that opens to the valve chamber, and a storage hole that is in communication with the relief valve port and is formed of a cylindrical space that opens to the secondary side outlet port. A valve body that opens and closes the relief valve port and a valve closing spring that biases the valve body in a valve closing direction are housed, and a spring receiving lid that holds the valve closing spring in a compressed state includes the housing hole. is engaged and fixed by the relative rotation with respect to,
The housing hole is provided with a protrusion that prevents the spring receiving cover from moving to the secondary outlet side by the urging force of the valve closing spring, and is provided on the secondary outlet side of the spring receiving cover. On the outer periphery, an engagement recess that is engaged with the protrusion is provided,
The pressure reducing valve , wherein the spring receiving lid is inscribed in the housing hole, and an air escape passage is provided on an outer periphery of the spring receiving lid and is continuous with the engagement recess .

前記ばね受け蓋に、前記逃がし弁口側と前記二次側流出口側とを連通する貫通孔が設けられている、あるいは、前記ばね受け蓋の前記二次側流出口側の端面に、凹状窪みが設けられていることを特徴とする請求項１に記載の減圧弁。 The spring receiving lid is provided with a through hole that communicates the relief valve port side and the secondary outlet port side, or a concave shape on the end surface of the spring receiving lid on the secondary outlet port side. The pressure reducing valve according to claim 1, wherein a depression is provided.

前記貫通孔あるいは前記凹状窪みの少なくとも一部は、断面非円形状を有することを特徴とする請求項２に記載の減圧弁。 The pressure reducing valve according to claim 2, wherein at least a part of the through hole or the concave recess has a non-circular cross section.

前記ばね受け蓋は、前記収納穴内に、該収納穴の軸線方向に沿って移動可能、且つ、該収納穴の軸線回りに回転可能に配在されていることを特徴とする請求項１〜３のいずれか一項に記載の減圧弁。 The spring receiving cover is disposed in the storage hole so as to be movable along the axial direction of the storage hole and to be rotatable about the axis of the storage hole. The pressure reducing valve according to any one of the above.

前記ばね受け蓋の外周に、前記ばね受け蓋を前記収納穴に挿入するときに前記突起部との干渉を回避するための逃げ溝が設けられていることを特徴とする請求項１〜４のいずれか一項に記載の減圧弁。 5. An escape groove for avoiding interference with the protrusion when the spring receiving cover is inserted into the housing hole is provided on an outer periphery of the spring receiving cover . The pressure reducing valve according to any one of the above.

前記収納穴における前記突起部、並びに、前記ばね受け蓋における前記係合窪み及び前記逃げ溝は、それぞれ複数設けられていることを特徴とする請求項５に記載の減圧弁。 6. The pressure reducing valve according to claim 5 , wherein a plurality of the protrusions in the storage hole, and the engagement recesses and the relief grooves in the spring receiving lid are provided.

前記収納穴における前記突起部、並びに、前記ばね受け蓋における前記係合窪み及び前記逃げ溝は、それぞれ等間隔で設けられていることを特徴とする請求項６に記載の減圧弁。 The pressure reducing valve according to claim 6 , wherein the protrusion in the storage hole and the engagement recess and the escape groove in the spring receiving lid are provided at equal intervals.

前記ばね受け蓋に、前記収納穴での前記ばね受け蓋の回転に伴って前記突起部に当接して前記収納穴での前記ばね受け蓋の回転を規制する回転規制部が設けられていることを特徴とする請求項１〜７のいずれか一項に記載の減圧弁。 The spring receiving cover is provided with a rotation restricting portion that abuts on the protrusion as the spring receiving cover rotates in the storage hole and restricts the rotation of the spring receiving cover in the storage hole. The pressure-reducing valve according to any one of claims 1 to 7 , wherein

前記収納穴は、前記逃がし弁口に連通する円筒状空所からなる第１収納穴と、前記二次側流出口に開口するとともに前記第１収納穴より大径の第２収納穴とを有することを特徴とする請求項１〜８のいずれか一項に記載の減圧弁。 The storage hole has a first storage hole made of a cylindrical space communicating with the relief valve port, and a second storage hole that opens to the secondary side outlet and has a diameter larger than that of the first storage hole. The pressure reducing valve according to any one of claims 1 to 8 , wherein

前記第１収納穴と前記第２収納穴との間に形成される段差部が、前記ばね受け蓋の前記逃がし弁口側への移動を阻止するストッパ部とされることを特徴とする請求項９に記載の減圧弁。 The step portion formed between the first storage hole and the second storage hole serves as a stopper portion that prevents the spring receiving lid from moving to the relief valve port side. 9. The pressure reducing valve according to 9 .

前記ばね受け蓋は、前記第１収納穴に内挿される大きさの一端側小径部と、前記第１収納穴より大径の他端側大径部とを有し、
前記一端側小径部と前記他端側大径部との間に形成される段差部が、前記収納穴の前記ストッパ部に対接せしめられるようにされていることを特徴とする請求項１０に記載の減圧弁。 The spring receiving lid has one end-side small-diameter portion that is sized to be inserted into the first storage hole, and the other end-side large-diameter portion that is larger in diameter than the first storage hole,
The step part formed between the said one end side small diameter part and the said other end side large diameter part is made to contact the said stopper part of the said storage hole, The Claim 10 characterized by the above-mentioned. The pressure reducing valve as described.

前記ばね受け蓋は、前記閉弁ばねの付勢力に抗して前記一端側小径部が前記第１収納穴に内挿された状態で、前記収納穴内で回転自在とされていることを特徴とする請求項１１に記載の減圧弁。 The spring receiving lid is rotatable in the storage hole in a state where the small diameter portion on one end side is inserted in the first storage hole against the urging force of the valve closing spring. The pressure reducing valve according to claim 11 .

前記他端側大径部が、前記第２収納穴に内接せしめられるようにされていることを特徴とする請求項１１又は１２に記載の減圧弁。 The other end large-diameter portion, a pressure reducing valve according to claim 11 or 12, characterized in that it is so caused to inscribed in the second storage hole.

前記弁本体に設けられた装着穴に、前記第２収納穴を形成する貫通孔を有するとともに、前記突起部が設けられた筒状部材が固定されていることを特徴とする請求項９〜１３のいずれか一項に記載の減圧弁。 A mounting hole provided in the valve body, and having a through hole for forming the second storage hole, claims 9 to 13, characterized in that the projection is a cylindrical member which is provided is fixed The pressure reducing valve according to any one of the above.

前記筒状部材は、超音波溶着により前記弁本体の前記装着穴に固着されていることを特徴とする請求項１４に記載の減圧弁。 The pressure reducing valve according to claim 14 , wherein the cylindrical member is fixed to the mounting hole of the valve body by ultrasonic welding.