JPH10281332A - Pressure control valve - Google Patents
Pressure control valveInfo
- Publication number
- JPH10281332A JPH10281332A JP8903697A JP8903697A JPH10281332A JP H10281332 A JPH10281332 A JP H10281332A JP 8903697 A JP8903697 A JP 8903697A JP 8903697 A JP8903697 A JP 8903697A JP H10281332 A JPH10281332 A JP H10281332A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm valve
- cover
- case
- pressure control
- control valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 37
- 230000006835 compression Effects 0.000 claims abstract description 27
- 238000007906 compression Methods 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 abstract description 19
- 230000037303 wrinkles Effects 0.000 abstract description 6
- 239000002828 fuel tank Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009194 climbing Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Fluid-Driven Valves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は圧力制御弁に関する
もので、より詳しくは、ダイアフラム弁を使用した圧力
制御弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure control valve, and more particularly, to a pressure control valve using a diaphragm valve.
【０００２】[0002]
【従来の技術】従来、制御すべき流体圧を、流路のシー
ト部と対向する弁部を形成したダイアフラム弁に作用さ
せて、流体圧が過大の場合はダイアフラム弁を開作動
し、流体圧が過小の場合はダイアフラム弁を閉作動して
流体圧を制御する圧力制御弁がある。2. Description of the Related Art Conventionally, a fluid pressure to be controlled is applied to a diaphragm valve having a valve portion opposed to a seat portion of a flow path, and when the fluid pressure is excessive, the diaphragm valve is opened to operate the fluid pressure. Is too small, there is a pressure control valve that closes the diaphragm valve to control the fluid pressure.
【０００３】このような圧力制御弁として、例えばガソ
リン用の燃料タンク内とキャニスタ（蒸発燃料捕集装
置）との連通流路中に図９及び図１０に示すような圧力
制御弁が用いられる（特開平８−２１０５３０号公報中
の図４参照）。As such a pressure control valve, for example, a pressure control valve as shown in FIGS. 9 and 10 is used in a communication passage between a fuel tank for gasoline and a canister (evaporated fuel collecting device) (FIG. 9). FIG. 4 in JP-A-8-210530).
【０００４】この図９及び図１０に示す圧力制御弁を説
明すると、その圧力制御弁内には、ケース１の上側周縁
部１ａと、カバー２の下側周縁部２ａ間に、可撓性を有
する円盤状のダイアフラム弁３の周縁に一体成形した圧
縮部３ａを圧縮挟持して、このダイアフラム弁３を介し
てケース１側に正圧室４が区画形成され、カバー２側に
大気室５が区画形成されている。The pressure control valve shown in FIGS. 9 and 10 will be described. In the pressure control valve, flexibility is provided between the upper peripheral portion 1a of the case 1 and the lower peripheral portion 2a of the cover 2. A positive pressure chamber 4 is defined and formed on the case 1 side through the diaphragm valve 3 by compressing and sandwiching a compression portion 3 a integrally formed on the periphery of the disk-shaped diaphragm valve 3, and an atmosphere chamber 5 is formed on the cover 2 side. The compartment is formed.
【０００５】上記ケース１の下部にはエバポパイプ６が
形成され、該エバポパイプ６は図示しないガソリン用燃
料タンク内と接続している。更にケース１の下部には導
出路７が形成され、該導出路７は図示しないキャニスタ
に連通している。該導出路７のケース側内端には圧力管
８が連通形成されているとともに該圧力管８はケース１
の略中央部において起立し、その開口端がシート面８ａ
になっている。更に上記導出路７にはチェックボール式
のベーパリリーフバルブ９が分岐して形成されている。
該ベーパリリーフバルブ９は、チェックボール９ａと、
該チェックボール９ａとストッパ９ｂ間に圧縮介在した
スプリング９ｃとからなる。[0005] An evaporative pipe 6 is formed at the lower portion of the case 1, and the evaporative pipe 6 is connected to a gasoline fuel tank (not shown). Further, a lead-out path 7 is formed in a lower portion of the case 1, and the lead-out path 7 communicates with a canister (not shown). A pressure pipe 8 is formed to communicate with the inner end of the outlet path 7 on the case side, and the pressure pipe 8 is connected to the case 1.
Of the seat surface 8a.
It has become. Further, a check ball type vapor relief valve 9 is formed in the outlet path 7 in a branched manner.
The vapor relief valve 9 includes a check ball 9a,
It comprises a spring 9c which is compressed and interposed between the check ball 9a and the stopper 9b.
【０００６】上記ダイアフラム弁３の中央下面には弁体
３ｂが一体形成され、該弁体３ｂが上記圧力管８のシー
ト面８ａに対向している。更に、ダイアフラム弁３の上
面側にはシェル１０が付設されているとともに、該シェ
ル１０とカバー２間にコイルスプリング１１が圧縮介在
されており、該コイルスプリング１１の付勢力によりダ
イアフラム弁３の弁体３ｂを常時上記シート面８ａ側へ
所定圧で付勢している。A valve 3b is integrally formed on the lower surface at the center of the diaphragm valve 3, and the valve 3b faces the seat surface 8a of the pressure pipe 8. Further, a shell 10 is provided on the upper surface side of the diaphragm valve 3, and a coil spring 11 is compressed and interposed between the shell 10 and the cover 2, and the urging force of the coil spring 11 causes the valve of the diaphragm valve 3 to be closed. The body 3b is constantly urged toward the seat surface 8a with a predetermined pressure.
【０００７】上記カバー２には大気導入ポート１２が形
成され、上記大気室５内の内圧は常時大気圧とされてい
る。また、ケース１には図示しない圧力センサへの導圧
路１３が形成されている。An air introduction port 12 is formed in the cover 2, and the internal pressure in the air chamber 5 is always atmospheric pressure. The case 1 has a pressure guide path 13 to a pressure sensor (not shown).
【０００８】そして、上記の構成において、正圧室４に
導入される燃料タンク内の内圧がコイルスプリング１１
の付勢力より大きい場合には正圧室４側の圧力によりダ
イアフラム弁３が開作動して燃料タンク内の圧力がキャ
ニスタ側へ放圧され、燃料タンク内の内圧がコイルスプ
リング１１の付勢力より小さい場合はダイアフラム弁３
が閉作動し、更に、燃料タンク内の内圧が大気圧に対し
て過少になるとベーパリリーフバルブ９が開作動して燃
料タンク内にキャニスタ内の空気を導入して燃料タンク
を保護するようになっている。In the above configuration, the internal pressure in the fuel tank introduced into the positive pressure chamber 4 is reduced by the coil spring 11.
Is greater than the urging force, the pressure in the positive pressure chamber 4 opens the diaphragm valve 3 to release the pressure in the fuel tank to the canister side, and the internal pressure in the fuel tank becomes greater than the urging force of the coil spring 11. Diaphragm valve 3 if smaller
When the internal pressure in the fuel tank becomes too low with respect to the atmospheric pressure, the vapor relief valve 9 opens to introduce air in the canister into the fuel tank to protect the fuel tank. ing.
【０００９】このような圧力制御弁において、そのケー
ス１と、カバー２と、ダイアフラム弁３とを固着する方
法として従来、次のような固着方法が採られている。先
ず図９に示すように、熱可塑性樹脂からなるケース１の
上側周縁部１ａに形成された凹部１ｂ内にダイアフラム
弁３の周縁において下面側へ突設した圧縮部３ａを嵌合
し、次で、熱可塑性樹脂からなるカバー２の周縁部２ａ
を、その下面２ｃと上記ダイアフラム弁３の圧縮部３ａ
の上面３ｃとの間に若干の隙間ｄ1 を設けてケース１の
接合部１ｄの内周面に嵌合して仮組付けし、次で、カバ
ー２を上方から加圧すると同時に超音波振動を与えて、
図９に示すような溶着用大径部２ｂを振動摩擦により溶
融して図１０に示すようにその溶着部Ａでケース１とカ
バー２を固着するようにしている。In such a pressure control valve, the following fixing method has conventionally been adopted as a method of fixing the case 1, the cover 2, and the diaphragm valve 3 to each other. First, as shown in FIG. 9, a compression portion 3 a protruding from the lower surface side at the peripheral edge of the diaphragm valve 3 is fitted into a concave portion 1 b formed in the upper peripheral portion 1 a of the case 1 made of a thermoplastic resin. , Peripheral portion 2a of cover 2 made of thermoplastic resin
To the lower surface 2c and the compression portion 3a of the diaphragm valve 3.
Some of a gap d 1 fitted to the inner peripheral surface of the joint portion 1d of the case 1 is temporarily assembled, with the following, pressurizing the cover 2 from above the ultrasonic vibration simultaneously between the upper surface 3c of And give
The large diameter portion 2b to be welded as shown in FIG. 9 is melted by vibration friction and the case 1 and the cover 2 are fixed at the welded portion A as shown in FIG.
【００１０】[0010]
【発明が解決しようとする課題】しかし、上記従来の圧
力制御弁においては、そのダイアフラム弁３の圧縮部３
ａの上面３ｃが平坦面に形成されているとともに該上面
３ｃに対向するカバー２の周縁部２ａの下面２ｃも平坦
面で形成されていることから、これらの面が非接触状態
の仮組付け状態から超音波溶着すると、ダイアフラム弁
３における圧縮部３ａの上面側が振動によってそのダイ
アフラム弁３の中心方向へ移動し、溶着終了後において
ダイアフラム弁３にしわが発生するおそれがある。この
ようなしわが発生すると、ダイアフラム弁３の弁体３ｂ
が、その閉弁時にシート面８ａに対して傾斜して当接す
ることになり、弁部のシール不良が発生する問題があ
る。However, in the above-mentioned conventional pressure control valve, the compression portion 3 of the diaphragm valve 3 is provided.
a is formed as a flat surface, and the lower surface 2c of the peripheral portion 2a of the cover 2 facing the upper surface 3c is also formed as a flat surface, so that these surfaces are temporarily assembled in a non-contact state. When ultrasonic welding is performed from the state, the upper surface side of the compression portion 3a of the diaphragm valve 3 moves toward the center of the diaphragm valve 3 due to vibration, and there is a possibility that wrinkles may occur in the diaphragm valve 3 after welding is completed. When such wrinkles occur, the valve element 3b of the diaphragm valve 3
However, when the valve is closed, it comes into contact with the seat surface 8a while being inclined, and there is a problem that a poor sealing of the valve portion occurs.
【００１１】そこで本発明は、上記のような超音波溶着
時におけるダイアフラム弁の中心方向への移動を阻止し
てダイアフラム弁のしわの発生を防止し、上記のような
シール不良の発生を防止できる圧力制御弁を提供するこ
とを目的とするものである。Therefore, the present invention prevents the diaphragm valve from moving toward the center during ultrasonic welding as described above, thereby preventing the occurrence of wrinkles of the diaphragm valve and the occurrence of the above-described defective seal. It is an object to provide a pressure control valve.
【００１２】[0012]
【課題を解決するための手段】上記の課題を解決するた
めに、請求項１記載の第１の発明は、ケースの上側周縁
部に凹溝を形成して該凹溝にダイアフラム弁の周縁に形
成した圧縮部を嵌合し、上記ケースにおける上記凹溝の
外側に位置する部分に接合部を形成し、カバーの下側周
縁部を上記接合部に嵌合して超音波溶着するものにおい
て、ダイアフラム弁の周縁に形成した圧縮部の上面に突
起を全周に渡って一体形成し、カバーの下側周縁部の下
面には、上記突起に嵌合する第２の凹溝を全周に渡って
形成し、かつ、上記突起の内側面と上記第２の凹溝の内
側面とを、カバーの仮組付時に相互に重なり合って係止
するように設定したことを特徴とするものである。According to a first aspect of the present invention, a groove is formed in an upper peripheral portion of a case, and the concave groove is formed in the peripheral groove of the diaphragm valve. Fitting the formed compressed portion, forming a joint at a portion located outside the concave groove in the case, fitting the lower peripheral edge of the cover to the joint, and ultrasonic welding, A projection is integrally formed on the upper surface of a compression portion formed on the periphery of the diaphragm valve over the entire periphery, and a second concave groove fitted to the projection is formed on the lower surface of the lower peripheral portion of the cover over the entire periphery. And the inner surface of the projection and the inner surface of the second groove are set so as to overlap with each other and lock when the cover is temporarily assembled.
【００１３】本発明においては、カバーの仮組付け時に
おいて、カバーの下側周縁部に形成した第２の凹溝の内
側面が、ダイアフラム弁の圧縮部の上面に形成した突起
の内側面に係止する。この状態でカバーを加圧しつつ超
音波振動を与えてケースの接合部とカバーの下側周縁部
を超音波溶着する。In the present invention, when the cover is temporarily assembled, the inner surface of the second concave groove formed on the lower peripheral portion of the cover is formed on the inner surface of the projection formed on the upper surface of the compression portion of the diaphragm valve. Lock. In this state, ultrasonic vibration is applied while pressurizing the cover to ultrasonically weld the joint of the case and the lower peripheral edge of the cover.
【００１４】このとき、ケース側の凹溝とダイアフラム
弁の圧縮部が嵌合し、かつ上記第２の凹溝の内側面とダ
イアフラム弁における圧縮部の内側面相互が係止してい
るので、上記の超音波振動によってダイアフラム弁の圧
縮部全体がダイアフラム弁の中心方向に移動することを
阻止する。At this time, since the concave groove on the case side and the compressed portion of the diaphragm valve are fitted, and the inner surface of the second concave groove and the inner surface of the compressed portion of the diaphragm valve are locked to each other. The above ultrasonic vibration prevents the entire compressed portion of the diaphragm valve from moving toward the center of the diaphragm valve.
【００１５】したがって、ダイアフラム弁の圧縮部がダ
イアフラム弁の中心方向に移動してダイアフラム弁にし
わが発生することを防止できる。請求項２記載の第２の
発明は、上記第１の発明において、突起の内側面と第２
の凹溝の内側面を、ダイアフラム面と直交する面に形成
したものである。Therefore, it is possible to prevent the compression portion of the diaphragm valve from moving toward the center of the diaphragm valve and wrinkling of the diaphragm valve. According to a second aspect of the present invention, in the first aspect, the inner surface of the protrusion and the second
Are formed on a surface orthogonal to the diaphragm surface.
【００１６】本第２の発明においても上記第１の発明と
同様の作用を発揮する。請求項３記載の第３の発明は、
上記第１の発明において、突起における内側面と第２の
凹溝の内側面を、ダイアフラム弁の内側から外側に向か
って斜め上方に向かうテーパ面としたものである。In the second aspect of the invention, the same effect as in the first aspect of the invention is exhibited. The third invention according to claim 3 is:
In the first invention, the inner surface of the projection and the inner surface of the second groove are tapered surfaces obliquely upward from the inside to the outside of the diaphragm valve.
【００１７】本第３の発明においては、更に、上記のよ
うなカバーの加圧時に、両テーパ面によって突起を第２
の凹溝内へ引き込む作用が働き、超音波振動により突起
が第２の凹溝外へ乗り上げることを阻止する。In the third aspect of the present invention, when the cover is pressurized as described above, the protrusion is formed by the two tapered surfaces.
Works to prevent the protrusion from climbing out of the second groove due to the ultrasonic vibration.
【００１８】[0018]
【発明の実施の形態】図１乃至図８に示す実施例に基づ
いて本発明の実施の形態について説明する。図１乃至図
４は第１実施例を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the embodiments shown in FIGS. 1 to 4 show a first embodiment.
【００１９】本発明は、図１におけるケース１とカバー
２とダイアフラム弁３との固着部分Ｂを要旨とするもの
で、本第１実施例におけるケース１とカバー２とダイア
フラム弁３との固着部Ｂ以外の構造は上記図９及び図１
０に示した従来の構造と同一であるため、図９及び図１
０と同一部分には同一符号を付してその説明は省略す
る。The gist of the present invention is a fixing portion B between the case 1, the cover 2 and the diaphragm valve 3 in FIG. 1, and the fixing portion between the case 1, the cover 2 and the diaphragm valve 3 in the first embodiment. Structures other than B are shown in FIGS.
9 and FIG. 1 because it is the same as the conventional structure shown in FIG.
The same parts as those of 0 have the same reference characters allotted, and description thereof will not be repeated.
【００２０】図１において、熱可塑性樹脂で成形された
ケース１の上側周縁部１ａの上面には、そのケース１の
径方向断面が矩形の第１の凹溝１ｂが上側周縁部１ａの
全周に渡って形成されている。In FIG. 1, on the upper surface of an upper peripheral portion 1a of a case 1 molded of a thermoplastic resin, a first concave groove 1b having a rectangular cross section in the radial direction of the case 1 is formed all around the upper peripheral portion 1a. Is formed over.
【００２１】熱可塑性樹脂で成形されたカバー２の下側
周縁部２ａの下面には、そのカバー２の径方向断面が長
方形の第２の凹溝２ｄが下面を開口して下側周縁部２ａ
の全周に渡って形成されている。On the lower surface of the lower peripheral edge 2a of the cover 2 formed of a thermoplastic resin, a second concave groove 2d having a rectangular cross section in the radial direction of the cover 2 is opened at the lower surface to open the lower peripheral edge 2a.
Is formed over the entire circumference.
【００２２】また、ゴム、樹脂等の可撓性材料で形成さ
れたダイアフラム弁３の周縁下面には、上記第１の凹溝
１ｂに嵌合する圧縮部３ａが、そのダイアフラム弁３の
径方向の断面を矩形にして全周に渡って一体に形成され
ている。更に上記圧縮部３ａの上面には、ダイアフラム
弁３の径方向の断面が矩形の突起３ｄがダイアフラム弁
３の全周に渡って一体に形成されている。On the lower surface of the periphery of the diaphragm valve 3 made of a flexible material such as rubber or resin, a compression portion 3a fitted into the first groove 1b is provided in a radial direction of the diaphragm valve 3. Has a rectangular cross section and is integrally formed over the entire circumference. Further, on the upper surface of the compression portion 3a, a projection 3d having a rectangular cross section in the radial direction of the diaphragm valve 3 is formed integrally over the entire circumference of the diaphragm valve 3.
【００２３】更に、図２に示すように、ケース１とカバ
ー２の固着前における上記第１の凹溝１ｂの径方向長Ｌ
1 は上記圧縮部３ａの径方向長Ｌ2 よりも大きく、ま
た、上記第２の凹溝２ｄの径方向長Ｌ3 は上記突起３ｄ
の径方向長Ｌ4 よりも大きく設定され、更に、上記第１
の凹溝１ｂにおける内側面１ｃと上記圧縮部３ａにおけ
る内側面３ｅとはダイアフラム弁３の中心から同径に形
成され、更に、上記第２の凹溝２ｄにおける内側面２ｅ
と上記突起３ｄの内側面３ｆとはダイアフラム弁３の中
心から同径に形成されている。Further, as shown in FIG. 2, the radial length L of the first groove 1b before the case 1 and the cover 2 are fixed to each other.
1 is larger than the radial length L 2 of the compression portion 3a, also radial length L 3 of the second groove 2d is the protrusion 3d
It is set larger than the radial length L 4 of the further the first
The inner surface 1c of the concave groove 1b and the inner surface 3e of the compression portion 3a are formed to have the same diameter from the center of the diaphragm valve 3, and further, the inner surface 2e of the second groove 2d.
The inner surface 3f of the projection 3d is formed to have the same diameter from the center of the diaphragm valve 3.
【００２４】また、上記第１の凹溝１ｂの外側に位置し
て壁状の接合部１ｄがケース１と一体に上方へ突出形成
され、該接合部１ｄはケース１の全周に渡って形成され
ている。更に、カバー２における下側周縁部２ａの外周
面は、その下方部に位置して上記接合部１ｄの内面１ｅ
に一ぱいに嵌合する面２ｆと、上方部に位置して接合部
１ｄの内面１ｅより若干大径の溶着用大径部２ｇとで形
成されている。Further, a wall-shaped joint 1d is formed outside the first groove 1b so as to protrude upward integrally with the case 1, and the joint 1d is formed over the entire periphery of the case 1. Have been. Further, the outer peripheral surface of the lower peripheral edge portion 2a of the cover 2 is located below the inner peripheral surface 1e of the joint portion 1d.
And a welding large-diameter portion 2g, which is located at an upper portion and has a slightly larger diameter than the inner surface 1e of the joining portion 1d.
【００２５】また、図１及び図２に示すように、上記溶
着用大径部２ｇが上記の接合部１ｄ上に載置された仮組
付け状態においては、カバー２の第２の凹部２ｄにおけ
る内側面２ｅの先部とダイアフラム弁３の突起３ｄにお
ける内側面３ｆの先部とが軸方向にわずかに重なり合う
ように設定されており、この重合部Ｃの重合量Ｈ1 は
０．１ｍｍ以上に設定するとよい。更に、この重合時に
おいて、カバー２の下側周縁部２ａの下面２ｈとダイア
フラム弁３の上面間には、溶着時においてカバー２が必
要量下降でき、かつ溶着終了時には上側周縁部２ａがダ
イアフラム弁３の圧縮部３ａを加圧できる隙間ｄ2 が形
成されている。As shown in FIGS. 1 and 2, when the large-diameter welding portion 2g is placed on the joint 1d in a temporary assembly state, the cover 2 has a second concave portion 2d. and is a tip portion of the inner surface 3f is set to be slightly overlap in the axial direction in the front portion and the projections 3d of the diaphragm valve 3 of the inner surface 2e, the polymerization amount H 1 of the overlapping portion C is more than 0.1mm It is good to set. Further, at the time of this polymerization, the cover 2 can be lowered by a required amount at the time of welding between the lower surface 2h of the lower peripheral portion 2a of the cover 2 and the upper surface of the diaphragm valve 3, and at the end of welding, the upper peripheral portion 2a becomes the diaphragm valve. gap d 2 of the 3 compression section 3a can be pressurized is formed.
【００２６】次にケース１とカバー２とダイアフラム弁
３の固着方法について説明する。先ず、図１及び図２に
示すように、ケース１における第１の凹溝１ｂ内にダイ
アフラム弁３の圧縮部３ａを嵌合し、その後、カバー２
の第２の凹溝２ｄにおける内側面２ｅの先部とダイアフ
ラム弁３の突起３ｄにおける内側面３ｆの先部とが軸方
向にわずかに重なり合うように係止させてカバー２の下
側周縁部２ａをケース１の接合部１ｄ内に嵌合し、仮組
付けする。Next, a method of fixing the case 1, the cover 2, and the diaphragm valve 3 will be described. First, as shown in FIGS. 1 and 2, the compression portion 3 a of the diaphragm valve 3 is fitted into the first groove 1 b of the case 1, and then the cover 2
Of the inner side surface 2e of the second concave groove 2d and the front end of the inner side surface 3f of the projection 3d of the diaphragm valve 3 so that they slightly overlap in the axial direction. Is fitted into the joint 1d of the case 1 and temporarily assembled.
【００２７】次に、カバー２の下側周縁部２ａを図の上
方から下方へ適宜手段で加圧しつつ超音波振動機により
超音波振動を与える。すると、カバー２における溶着用
大径部２ｇの下端部とこれに圧接するケース１における
接合部１ｄの内面部とが振動摩擦により溶融しながら下
側周縁部２ａが下降する。Next, ultrasonic vibration is applied by an ultrasonic vibrator while the lower peripheral portion 2a of the cover 2 is pressed downward from above in the figure by appropriate means. Then, the lower peripheral edge portion 2a descends while the lower end portion of the large-diameter portion 2g of the cover 2 and the inner surface portion of the joining portion 1d of the case 1 pressed against the inner portion are melted by vibration friction.
【００２８】そして、下側周縁部２ａが所定量下降した
時点でその超音波振動と加圧を停止すると、図３及び図
４に示すように、カバー２における下側周縁部２ａの下
面２ｈ（図２参照）がダイアフラム弁３の圧縮部３ａを
所定量圧縮するとともに溶着部Ｄによりケース１とカバ
ー２が固着される。したがって、ダイアフラム弁３の圧
縮部３ａはケース１とカバー２間に圧縮介在されて固定
されるとともにこの圧縮部３ａによってケース１とカバ
ー２間が気密的に連結される。When the ultrasonic vibration and pressurization are stopped when the lower peripheral edge 2a is lowered by a predetermined amount, as shown in FIGS. 3 and 4, the lower surface 2h of the lower peripheral edge 2a of the cover 2 (see FIG. 3). 2) compresses the compression portion 3a of the diaphragm valve 3 by a predetermined amount, and the case 1 and the cover 2 are fixed by the welding portion D. Therefore, the compression portion 3a of the diaphragm valve 3 is compressed and interposed between the case 1 and the cover 2 and is fixed, and the case 1 and the cover 2 are hermetically connected by the compression portion 3a.
【００２９】また、上記超音波振動による溶着作業時に
おいて、その振動開始前の仮組付け状態から溶着終了時
点までの間、ダイアフラム弁３に形成した圧縮部３ａの
内側面３ｅが第１の凹溝１ｂの内側面１ｃに、また、ダ
イアフラム弁３に形成した突起３ｄの内側面３ｆが第２
の凹溝２ｄの内側面２ｅに夫々係止しているため、上記
の超音波振動によってダイアフラム弁３の圧縮部３ａが
ダイアフラム弁３の中心方向（内側方向）に移動するこ
とを阻止される。そのため、従来のようなダイアフラム
弁の移動によるしわの発生が防止される。During the welding operation by the ultrasonic vibration, the inner surface 3e of the compression portion 3a formed in the diaphragm valve 3 is in the first recessed state from the temporary assembly state before the start of the vibration to the end of the welding. The inner surface 1c of the groove 1b and the inner surface 3f of the projection 3d formed on the diaphragm valve 3 are the second surface.
Are locked to the inner side surface 2e of the concave groove 2d, respectively, thereby preventing the compressed portion 3a of the diaphragm valve 3 from moving in the center direction (inward direction) of the diaphragm valve 3 due to the above ultrasonic vibration. Therefore, generation of wrinkles due to the movement of the diaphragm valve as in the related art is prevented.
【００３０】図５乃至図８は第２実施例を示す。本第２
実施例は、上記第１実施例におけるカバー２に形成した
第２の凹溝２ｄと、これに嵌合するダイアフラム弁３の
突起３ｄの形状の変形例を示す。FIGS. 5 to 8 show a second embodiment. Book second
The present embodiment shows a modified example of the shape of the second groove 2d formed in the cover 2 and the projection 3d of the diaphragm valve 3 fitted in the second groove 2d in the first embodiment.
【００３１】すなわち、ダイアフラム弁３の圧縮部３ａ
の上面に、ダイアフラム弁３の内側から外側に向かって
斜め上方へ向かうテーパ面３ｇを有するテーパ状突起３
ｈを全周に渡って一体形成し、カバー２の下側周縁部２
ａの下面に、上記テーパ状突起３ｈのテーパ面３ｇと同
方向に傾斜するテーパ面２ｉを有するテーパ状溝２ｊを
全周に渡って形成し、かつ、溶着前における上記のよう
な仮組付け時において、上記テーパ状突起３ｈにおける
テーパ面３ｇの先部と上記テーパ状溝２ｊにおけるテー
パ面２ｉの先部とがわずかに重合し、更に、カバー２に
おける下側周縁部２ａの下面とダイアフラム弁３の圧縮
部３ａの上面間に上記第１実施例と同様の隙間ｄ2 が形
成されるようになっている。That is, the compression portion 3a of the diaphragm valve 3
Tapered projection 3 having a tapered surface 3g obliquely upward from the inside to the outside of the diaphragm valve 3 on the upper surface of the diaphragm valve 3
h is formed integrally over the entire circumference, and the lower peripheral edge 2 of the cover 2 is formed.
A tapered groove 2j having a tapered surface 2i inclined in the same direction as the tapered surface 3g of the tapered projection 3h is formed on the entire lower surface of the lower surface a, and the above temporary assembly before welding is performed. At this time, the tip of the tapered surface 3g of the tapered protrusion 3h slightly overlaps with the tip of the tapered surface 2i of the tapered groove 2j. similar gap d 2 in the first embodiment between the upper surface of the compression portion 3a of 3 is adapted to be formed.
【００３２】上記重合部におけるダイアフラム面と平行
する方向の重合量Ｌ5 は０．５ｍｍ以上に設定し、ダイ
アフラム面と直交する方向（軸方向）の重合量Ｈ2 は
０．１ｍｍ以上に設定するとよい。The polymerization amount L 5 in a direction parallel to the diaphragm plane in the overlapping portion is set to more than 0.5 mm, the polymerization amount of H 2 direction (axial direction) perpendicular to the diaphragm surface is set to more than 0.1mm Good.
【００３３】その他の構造は上記第１実施例と同様であ
るため、同一部分には同一符号を付してその説明は省略
する。本第２実施例においては、図５及び図６に示すよ
うな仮組付け状態から、上記第１実施例と同様にカバー
２を加圧しつつ超音波振動を与えて、図７及び図８に示
すように溶着する。Since the other structure is the same as that of the first embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted. In the second embodiment, ultrasonic vibration is applied while pressing the cover 2 in the same manner as in the first embodiment from the temporarily assembled state as shown in FIGS. Weld as shown.
【００３４】この溶着作業時においてもテーパ状溝２ｊ
とテーパ状突起３ｈとの係合により、上記第１実施例と
同様に、ダイアフラム弁３における圧縮部３ａにおける
上面側がダイアフラム弁３の中心方向へ移動することを
阻止できる。更に、この溶着時に、カバー２の下側周縁
部２ａが加圧されて下降すると、上記両テーパ面２ｉと
３ｇとの係合によりテーパ状突起３ｈがテーパ状溝２ｊ
内へ引き込まれるため、上記の振動によりテーパ状突起
３ｈがテーパ状溝２ｊ以外へ乗り上げることを防止でき
る。Even during this welding operation, the tapered groove 2j
The engagement of the tapered projection 3h with the tapered projection 3h prevents the upper surface side of the compression portion 3a of the diaphragm valve 3 from moving toward the center of the diaphragm valve 3 as in the first embodiment. Further, during this welding, when the lower peripheral portion 2a of the cover 2 is pressed and lowered, the tapered protrusion 3h is formed by the engagement of the tapered surfaces 2i and 3g with the tapered groove 2j.
Since it is drawn in, the above-mentioned vibration can prevent the tapered projection 3h from riding on a portion other than the tapered groove 2j.
【００３５】なお、上記各実施例は、燃料タンク用の圧
力制御弁に適用した例であるが、本発明は上記実施例の
圧力制御弁に限るものではなく、その他、ダイアフラム
弁を使用した圧力制御弁に適用できるものである。Each of the above embodiments is an example in which the present invention is applied to a pressure control valve for a fuel tank. However, the present invention is not limited to the pressure control valve of the above embodiment. It can be applied to control valves.
【００３６】[0036]
【発明の効果】上記のようであるから、請求項１及び２
記載の発明によれば、ケースとカバーの超音波溶着時に
ダイアフラム弁にしわが発生することを防止でき、従来
のようなダイアフラム弁の弁部においてシール不良が発
生することを防止できる。As described above, claims 1 and 2
According to the invention described above, it is possible to prevent wrinkles from being generated in the diaphragm valve during ultrasonic welding of the case and the cover, and it is possible to prevent the occurrence of a defective seal in the valve portion of the conventional diaphragm valve.
【００３７】請求項３記載の発明によれば、超音波溶着
時にダイアフラム弁に形成した突起が、カバーに形成し
た第２の凹溝外へ乗り上げることを阻止し、上記第１の
発明の効果をより確実なものとすることができる。According to the third aspect of the invention, the projection formed on the diaphragm valve at the time of ultrasonic welding is prevented from climbing out of the second groove formed on the cover. It can be more reliable.
【図１】本発明の第１実施例を示す仮組付け状態の縦断
面図。FIG. 1 is a longitudinal sectional view of a temporarily assembled state showing a first embodiment of the present invention.
【図２】図１における要部拡大縦断面図。FIG. 2 is an enlarged longitudinal sectional view of a main part in FIG.
【図３】図１の実施例における溶着後の状態を示す縦断
面図。FIG. 3 is a longitudinal sectional view showing a state after welding in the embodiment of FIG. 1;
【図４】図３における要部拡大縦断面図。FIG. 4 is an enlarged longitudinal sectional view of a main part in FIG. 3;
【図５】本発明の第２実施例を示す仮組付け状態の縦断
面図。FIG. 5 is a longitudinal sectional view showing a second embodiment of the present invention in a temporarily assembled state.
【図６】図５における要部拡大縦断面図。FIG. 6 is an enlarged longitudinal sectional view of a main part in FIG. 5;
【図７】図５の実施例における溶着後の状態を示す縦断
面図。FIG. 7 is a longitudinal sectional view showing a state after welding in the embodiment of FIG. 5;
【図８】図７における要部拡大縦断面図。8 is an enlarged longitudinal sectional view of a main part in FIG. 7;
【図９】従来構造の仮組付け状態を示す縦断面図。FIG. 9 is a longitudinal sectional view showing a temporary assembly state of a conventional structure.
【図１０】従来構造の溶着状態を示す縦断面図。FIG. 10 is a longitudinal sectional view showing a welded state of a conventional structure.
１…ケース １ａ…上側周縁部 １ｂ…凹溝 ２…カバー ２ａ…下側周縁部 ２ｄ…第２の凹溝 ２ｅ…内側面 ３…ダイアフラム弁 ３ａ…圧縮部 ３ｄ…突起 ３ｆ…内側面 ２ｉ，３ｇ…テーパ面 ２ｊ…テーパ状溝 ３ｈ…テーパ状突起 DESCRIPTION OF SYMBOLS 1 ... Case 1a ... Upper peripheral part 1b ... Concave groove 2 ... Cover 2a ... Lower peripheral part 2d ... Second concave groove 2e ... Inner surface 3 ... Diaphragm valve 3a ... Compression part 3d ... Protrusion 3f ... Inner surface 2i, 3g ... tapered surface 2j ... tapered groove 3h ... tapered protrusion
Claims (3)
凹溝にダイアフラム弁の周縁に形成した圧縮部を嵌合
し、上記ケースにおける上記凹溝の外側に位置する部分
に接合部を形成し、カバーの下側周縁部を上記接合部に
嵌合して超音波溶着するものにおいて、 ダイアフラム弁の周縁に形成した圧縮部の上面に突起を
全周に渡って一体形成し、カバーの下側周縁部の下面に
は、上記突起に嵌合する第２の凹溝を全周に渡って形成
し、かつ、上記突起の内側面と上記第２の凹溝の内側面
とを、カバーの仮組付時に相互に重なり合って係止する
ように設定したことを特徴とする圧力制御弁。A concave portion is formed in an upper peripheral portion of a case, a compression portion formed in a peripheral portion of a diaphragm valve is fitted into the concave groove, and a joining portion is formed in a portion of the case located outside the concave groove. The lower peripheral portion of the cover is fitted to the above-mentioned joint portion and ultrasonically welded, and a projection is integrally formed over the entire periphery on the upper surface of the compression portion formed on the peripheral edge of the diaphragm valve, and the cover is formed. On the lower surface of the lower peripheral portion, a second concave groove fitted to the projection is formed over the entire circumference, and the inner surface of the projection and the inner surface of the second concave groove are formed. A pressure control valve, wherein the pressure control valve is set so as to be overlapped and locked when the cover is temporarily assembled.
ダイアフラム面と直交する面に形成した請求項１記載の
圧力制御弁。2. An inner surface of the projection and an inner surface of the second groove,
The pressure control valve according to claim 1, wherein the pressure control valve is formed on a surface orthogonal to the diaphragm surface.
面を、ダイアフラム弁の内側から外側に向かって斜め上
方に向かうテーパ面とした請求項１記載の圧力制御弁。3. The pressure control valve according to claim 1, wherein the inner surface of the projection and the inner surface of the second groove are tapered surfaces obliquely upward from the inside to the outside of the diaphragm valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08903697A JP3580661B2 (en) | 1997-04-08 | 1997-04-08 | Pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08903697A JP3580661B2 (en) | 1997-04-08 | 1997-04-08 | Pressure control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10281332A true JPH10281332A (en) | 1998-10-23 |
| JP3580661B2 JP3580661B2 (en) | 2004-10-27 |
Family
ID=13959676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08903697A Expired - Lifetime JP3580661B2 (en) | 1997-04-08 | 1997-04-08 | Pressure control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3580661B2 (en) |
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| US11754064B2 (en) | 2006-04-14 | 2023-09-12 | Deka Products Limited Partnership | Fluid pumping systems, devices and methods |
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| US12044229B2 (en) | 2006-04-14 | 2024-07-23 | Deka Products Limited Partnership | Fluid pumping systems, devices and methods |
| US11828279B2 (en) | 2006-04-14 | 2023-11-28 | Deka Products Limited Partnership | System for monitoring and controlling fluid flow in a hemodialysis apparatus |
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| JP2010191258A (en) * | 2009-02-19 | 2010-09-02 | Seiko Epson Corp | Pressure regulating valve and liquid drop discharge device including same |
| KR20120004416A (en) * | 2009-04-01 | 2012-01-12 | 게오르그 피셔 로라이퉁스지스테메 악티엔게젤샤프트 | Diaphragm valve |
| US12220507B2 (en) | 2011-05-24 | 2025-02-11 | Deka Products Limited Partnership | Blood treatment systems and methods |
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