JPH11190433A - Structure of air circuit - Google Patents
Structure of air circuitInfo
- Publication number
- JPH11190433A JPH11190433A JP9360296A JP36029697A JPH11190433A JP H11190433 A JPH11190433 A JP H11190433A JP 9360296 A JP9360296 A JP 9360296A JP 36029697 A JP36029697 A JP 36029697A JP H11190433 A JPH11190433 A JP H11190433A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- air circuit
- gasket
- bead
- forming member
- 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.)
- Pending
Links
Landscapes
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Gasket Seals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、バルブポジショナ
の電気−空気変換器等に用いられる空気回路の構造に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a pneumatic circuit used for an electric-to-pneumatic converter of a valve positioner.
【０００２】[0002]
【従来の技術】バルブポジショナは、入力信号（電気信
号）をノズルフラッパ機構を有する電気−空気変換器
（以下、電空変換器という）によって空気圧信号に変換
して取り出した後、パイロットリレー等の空気増幅器で
増幅してバルブの操作器に出力空気圧として伝送するこ
とにより、バルブの作動軸を入力信号に応じた位置に制
御するもので、石油化学、化学工業等の種々プラントに
広く用いられる（特開平４−１８５９０１号公報等）。2. Description of the Related Art A valve positioner converts an input signal (electric signal) into a pneumatic signal by an electro-pneumatic converter having a nozzle flapper mechanism (hereinafter, referred to as an electro-pneumatic converter) and extracts the signal. It controls the valve operating shaft to a position corresponding to the input signal by amplifying it with an amplifier and transmitting it as output air pressure to the valve operating device. It is widely used in various plants such as petrochemical and chemical industries. JP-A-4-185901, etc.).
【０００３】電空変換器のノズルフラッパ機構への供給
空気圧の供給およびノズルフラッパ機構による空気圧信
号の取出しは、通常空気回路によって行っている。空気
回路としては、ガスケットを用いる方式が一般的であ
る。The supply of air pressure to the nozzle flapper mechanism of the electropneumatic converter and the extraction of the air pressure signal by the nozzle flapper mechanism are usually performed by an air circuit. As the air circuit, a system using a gasket is generally used.
【０００４】従来のガスケット方式による空気回路は、
図７に示すように空気回路形成部材１と固定部材２の空
気回路用通路４，５をこれら両部材間に介在させたガス
ケット３の連通孔６によって連通することで空気回路を
形成している。ガスケット３は平板状に形成され、空気
回路形成部材１のビス用ねじ孔７と固定部材２のビス取
付孔８に対応してリング装填用孔９が形成されている。
このリング装填用孔９には、隙間設定用のリング１３が
装填され、周縁には環状のビード１０が一体に設けら
れ、これによって空気回路形成部材１と固定部材２とガ
スケット３との隙間をシールし、空気の漏洩、雨水の浸
入等を防止している。[0004] The air circuit by the conventional gasket system is as follows.
As shown in FIG. 7, the air circuit is formed by connecting the air circuit forming members 1 and the air circuit passages 4 and 5 of the fixing member 2 by the communication holes 6 of the gasket 3 interposed between these members. . The gasket 3 is formed in a flat plate shape, and a ring loading hole 9 is formed corresponding to the screw screw hole 7 of the air circuit forming member 1 and the screw mounting hole 8 of the fixing member 2.
A ring 13 for setting a gap is loaded in the ring loading hole 9, and an annular bead 10 is integrally provided on the periphery of the ring, thereby forming a gap between the air circuit forming member 1, the fixing member 2 and the gasket 3. Seals prevent air leakage and rainwater intrusion.
【０００５】空気回路の形成に際して、空気回路形成部
材１と固定部材２との間にガスケット３と間隔設定用の
リング１３を介在させ、ビス１１をシールワッシャ１２
を介して固定部材２のビス取付孔８、リング１３の孔１
４に挿通して空気回路形成部材１のビス用ねじ孔７にね
じ込むと、ビード１０が空気回路形成部材１と固定部材
２に密接し、これによって空気回路形成部材１と固定部
材２の空気回路用通路４，６がガスケット３の連通孔６
を介して連通し空気回路が形成される。なお、シールワ
ッシャ１２は、平座金の両面にＮＢＲ（トリルゴム）等
をコーティングしたものが用いられる。リング１３の厚
みは、自然状態におけるビード１０の厚みより小さく設
定され、空気回路形成部材１と固定部材２の間隔を設定
する。In forming the air circuit, a gasket 3 and a ring 13 for spacing are interposed between the air circuit forming member 1 and the fixing member 2, and a screw 11 is attached to a seal washer 12.
Through the screw mounting hole 8 of the fixing member 2 and the hole 1 of the ring 13
4 and screwed into the screw screw hole 7 of the air circuit forming member 1, the bead 10 comes into close contact with the air circuit forming member 1 and the fixing member 2, thereby forming the air circuit of the air circuit forming member 1 and the fixing member 2. Passages 4 and 6 are communicating holes 6 of gasket 3
And an air circuit is formed. As the seal washer 12, a flat washer having both surfaces coated with NBR (tolyl rubber) or the like is used. The thickness of the ring 13 is set smaller than the thickness of the bead 10 in a natural state, and sets the distance between the air circuit forming member 1 and the fixing member 2.
【０００６】[0006]
【発明が解決しようとする課題】上記した従来の空気回
路の構造は、空気回路形成部材１、固定部材２およびガ
スケット３の３部材によって空気回路を形成し、シール
ワッシャ１２によってビス取付孔８およびリング装填用
孔９をシールすることにより、空気の漏洩、雨水の浸入
を防止していた。In the structure of the conventional air circuit described above, an air circuit is formed by the three members of the air circuit forming member 1, the fixing member 2 and the gasket 3, and the screw mounting hole 8 and the screw mounting hole 8 are formed by the seal washer 12. By sealing the ring loading hole 9, air leakage and rainwater intrusion were prevented.
【０００７】しかしながら、シールワッシャ１２は、平
座金の両面にＮＢＲ（トリルゴム）等をコーティングし
たものが用いられるため、ばね座金と異なりビス１１の
緩み止め機能を全く備えておらず、そのため振動、衝撃
等によってビス１１が緩むと空気回路のシール性が低下
し、空気が漏洩したり雨水がビス取付孔８、リング装填
用孔９から空気回路形成部材１と固定部材２との間やビ
ス用ねじ孔７に浸入するといった問題があった。一方、
シールワッシャ１２の代わりにばね座金を使用した場合
は、ビス１１の緩みについては確実に防止することがで
きるが、シール機能を全く備えていないため十分なシー
ル性能を得ることができず好ましくない。However, since the seal washer 12 has a flat washer coated on both sides with NBR (tolyl rubber) or the like, unlike the spring washer, the seal washer 12 does not have any function of preventing the screw 11 from being loosened. If the screw 11 is loosened due to, for example, the sealing performance of the air circuit is reduced, air leaks or rainwater flows between the air circuit forming member 1 and the fixing member 2 from the screw mounting hole 8 and the ring mounting hole 9 or the screw for the screw. There is a problem that it penetrates into the hole 7. on the other hand,
When a spring washer is used instead of the seal washer 12, loosening of the screw 11 can be reliably prevented. However, since it has no sealing function, sufficient sealing performance cannot be obtained, which is not preferable.
【０００８】そこで、シールワッシャとばね座金を併用
すれば、ビス１１の緩みは防止できるがシール性は保証
されなくなる。また、座金の種類および数が増加するば
かりか、ビスをねじ込み時に誤っていずれか一方の座金
を１つだけ用いたり、あるいは同一種の座金を２つ用い
たりすると、所期の性能を得ることができなくなる。Therefore, if the seal washer and the spring washer are used together, the loosening of the screw 11 can be prevented, but the sealing property cannot be guaranteed. In addition to increasing the types and number of washers, if one screw is used by mistake when screwing one screw or two washers of the same type are used, the expected performance can be obtained. Can not be done.
【０００９】本発明は上記した従来の問題を解決するた
めになされたもので、その目的とするところは、ガスケ
ットにシール機能に加えてビスの回転防止機能をもたせ
ることにより構造が簡単で、部品点数を増加する必要が
なくビス挿通孔からの空気の漏洩、雨水の浸入を確実に
防止することができるようにした空気回路の構造を提供
することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. An object of the present invention is to provide a gasket having a function of preventing rotation of a screw in addition to a sealing function, thereby simplifying the structure. It is an object of the present invention to provide a structure of an air circuit in which leakage of air from a screw insertion hole and entry of rainwater can be reliably prevented without increasing the number of points.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
に第１の発明は、開口縁に環状のビードが設けられた挿
通孔を有するガスケットを空気回路形成部材と固定部材
との間に介在させ、前記ガスケットと固定部材をビスに
よって前記空気回路形成部材に固定し前記ビードを前記
空気回路形成部材と固定部材に押し付けることにより、
これら両部材に設けた空気回路用通路を前記挿通孔を介
して連通させた空気回路の構造において、前記ガスケッ
トに設けられ前記ビスが挿通されるビス挿通孔の開口縁
に、前記ビスの周面に密接される環状のビードを一体に
設けたことを特徴とする。According to a first aspect of the present invention, a gasket having an insertion hole provided with an annular bead at an opening edge is interposed between an air circuit forming member and a fixing member. By fixing the gasket and the fixing member to the air circuit forming member with a screw and pressing the bead against the air circuit forming member and the fixing member,
In the air circuit structure in which the air circuit passages provided in these two members are communicated through the insertion hole, the peripheral surface of the screw is provided at the opening edge of the screw insertion hole provided in the gasket and through which the screw is inserted. An annular bead that is in close contact with is provided integrally.
【００１１】第２の発明は、上記第１の発明において、
空気回路形成部材の表面でビスがねじ込まれるビス用ね
じ孔の開口部に、ガスケットのビードを収納するテーパ
状の凹部もしくは環状壁を設けたことを特徴とする。According to a second aspect, in the first aspect,
A tapered recess or an annular wall for accommodating a bead of a gasket is provided at an opening of a screw hole for a screw into which a screw is screwed on the surface of the air circuit forming member.
【００１２】第３の発明は、上記第１の発明において、
空気回路形成部材と固定部材のいずれか一方に間隔設定
用のピンを設け、ガスケットにこのピンが挿通するピン
孔を設けたことを特徴とする。According to a third aspect, in the first aspect,
A gap setting pin is provided on one of the air circuit forming member and the fixing member, and a pin hole through which the pin is inserted is provided on the gasket.
【００１３】第１の発明において、ビスを固定部材およ
びガスケットのビス挿通孔に挿通して空気回路形成部材
のビス用ねじ孔にねじ込むと、ガスケットのビードが空
気回路形成部材と固定部材に密接し空気回路用通路をシ
ールする。また、ガスケットを空気回路形成部材と固定
部材で挟み込むと、ビードは押し潰されるため径方向に
弾性変形してビスの周面に圧接されることにより、雨水
がビスとガスケットのビス挿通孔との隙間から空気回路
形成部材と固定部材との間やビス用ねじ孔に浸入するの
を防止する。また、ビードはビスに押し付けられること
により、ビスの緩みを防止する。したがって、ばね座金
が不要で良好なシール機能と回転防止機能をもたせるこ
とができる。さらに、径方向への弾性変形量を考慮して
ビードの穴径をビスの外径より大きくしておくと、締付
時のビスのねじ山によるビードの損傷を軽減することが
できる。In the first invention, when a screw is inserted into the screw insertion hole of the fixing member and the gasket and screwed into the screw screw hole of the air circuit forming member, the bead of the gasket comes into close contact with the air circuit forming member and the fixing member. Seal the air circuit passage. Also, when the gasket is sandwiched between the air circuit forming member and the fixing member, the bead is crushed and elastically deformed in the radial direction and is pressed against the peripheral surface of the screw, so that rainwater flows between the screw and the screw insertion hole of the gasket. It is prevented from entering between the air circuit forming member and the fixing member or into the screw hole for screws from the gap. Further, the bead is pressed against the screw to prevent the screw from being loosened. Therefore, a good sealing function and an anti-rotation function can be provided without the need for a spring washer. Further, if the hole diameter of the bead is made larger than the outer diameter of the screw in consideration of the amount of elastic deformation in the radial direction, damage to the bead due to the screw thread of the screw at the time of tightening can be reduced.
【００１４】第２の発明において、回路形成部材の表面
に設けたテーパ状の凹部もしくは環状壁は、ビスをビス
用ねじ孔にねじ込んで固定部材とガスケットを空気回路
形成部材に固定した際、ビードを凹部または環状壁とビ
スが挟み込み、ビスとビードとの間のシール性を高め
る。In the second aspect of the present invention, the tapered concave portion or the annular wall provided on the surface of the circuit forming member has a bead when the fixing member and the gasket are fixed to the air circuit forming member by screwing the screw into the screw screw hole. The screw is sandwiched between the recess or the annular wall and the sealing property between the screw and the bead is enhanced.
【００１５】第３の発明において、ピンは空気回路形成
部材と固定部材の間隔を設定し、ガスケットのビードの
過大な圧縮を阻止する。In the third aspect of the invention, the pin sets the distance between the air circuit forming member and the fixing member, and prevents excessive compression of the gasket bead.
【００１６】[0016]
【発明の実施の形態】以下、本発明を図面に示す実施の
形態に基づいて詳細に説明する。図１は本発明に係る空
気回路の構造を示す要部の断面図、図２はガスケットの
平面図、図３は同ガスケットの要部の断面図である。な
お、従来技術の欄で示した構成部材等と同一のものにつ
いては同一符号をもって示し、その説明を適宜省略す
る。これらの図において、空気回路形成部材１と固定部
材２との間に介在されビス１１によって前記固定部材２
と共に空気回路形成部材１に取付けられるガスケット３
は、合成ゴム、シリーコンゴム等によって平板状に形成
され、前記空気回路形成部材１および固定部材２の空気
回路用通路４，５に対応した位置に連通孔６が形成され
ている。また、空気回路形成部材１のねじ孔７と固定部
材２のビス取付孔８に対応してビス挿通孔２１が形成さ
れている。このビス挿通孔２１の開口縁には、その全周
を取り囲む環状のビード１０が一体に設けられている。
ビス挿通孔２１の穴径Ｄは自然状態においてビス１１の
雄ねじが形成されていない基部側の外径Ｄ1 より若干大
きい（Ｄ＞Ｄ1 ）。さらに、ガスケット３の表裏面に
は、外周縁部を取り囲む外周ビード２２と、この外周ビ
ード２２と前記ビード１０、隣り合うビード１０どう
し、ビード１０と外周ビード２２との間を連結する連結
ビード２３が一体に設けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is a cross-sectional view of a main part showing a structure of an air circuit according to the present invention, FIG. 2 is a plan view of a gasket, and FIG. 3 is a cross-sectional view of a main part of the gasket. The same components as those shown in the section of the prior art are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. In these figures, the fixing member 2 is interposed between the air circuit forming member 1 and the fixing member 2 by a screw 11.
Gasket 3 attached to pneumatic circuit forming member 1
Is formed in a flat plate shape using synthetic rubber, silicone rubber or the like, and a communication hole 6 is formed at a position corresponding to the air circuit passages 4 and 5 of the air circuit forming member 1 and the fixing member 2. Further, screw insertion holes 21 are formed corresponding to the screw holes 7 of the air circuit forming member 1 and the screw mounting holes 8 of the fixing member 2. An annular bead 10 surrounding the entire periphery of the screw insertion hole 21 is provided integrally with the opening edge of the screw insertion hole 21.
In the natural state, the hole diameter D of the screw insertion hole 21 is slightly larger than the outer diameter D1 of the screw 11 where the male screw is not formed (D> D1). Further, on the front and back surfaces of the gasket 3, an outer peripheral bead 22 surrounding the outer peripheral edge, and a connecting bead 23 for connecting the outer bead 22 to the bead 10, adjacent beads 10, and between the bead 10 and the outer bead 22 are provided. Are provided integrally.
【００１７】前記空気回路形成部材１の表面の適宜箇所
には、固定部材２との間隔を設定する間隔設定用のピン
２５が一体に突設され、このピン２５に対応して前記ブ
ラケット３にピン孔２６が形成されている。ピン２５の
高さは、自然状態におけるビード１０の厚さより小さく
設定されている。At an appropriate position on the surface of the air circuit forming member 1, an interval setting pin 25 for setting an interval with the fixing member 2 is integrally protruded. A pin hole 26 is formed. The height of the pin 25 is set smaller than the thickness of the bead 10 in a natural state.
【００１８】空気回路の形成に際して、ピン２５をピン
孔２６に挿入してガスケット３を空気回路形成部材１と
固定部材２との間に介在させ、ビス１１をビス取付孔
８、ビス挿通孔２１に平座金２７（またはシールワッシ
ャ）を介して挿通しビス用ねじ孔７にねじ込んで固定部
材２によりガスケット３を空気回路形成部材１に押し付
けると、空気回路形成部材１と固定部材２の空気回路用
通路４，５がガスケット３の連通孔６を介して連通し空
気回路が形成される。In forming the air circuit, the pin 25 is inserted into the pin hole 26, the gasket 3 is interposed between the air circuit forming member 1 and the fixing member 2, and the screw 11 is inserted into the screw mounting hole 8 and the screw insertion hole 21. When the gasket 3 is screwed into the screw hole 7 for screws through the flat washer 27 (or seal washer) and the gasket 3 is pressed against the air circuit forming member 1 by the fixing member 2, the air circuit of the air circuit forming member 1 and the fixing member 2 The air passages 4 and 5 communicate with each other through the communication holes 6 of the gasket 3 to form an air circuit.
【００１９】ここで、固定部材２をピン２５に押し付け
ると、ガスケット３のビード１０、外周ビード２２およ
び連結ビード２３が圧縮して空気回路形成部材１と固定
部材２に密接するため、空気回路形成部材１と固定部材
２の間を良好にシールし、空気回路用通路４，５および
連通孔６を連通させることができる。したがって、空気
が漏洩したり、空気回路内に雨水等が浸入するのを確実
に防止することができる。When the fixing member 2 is pressed against the pin 25, the bead 10, the outer peripheral bead 22, and the connecting bead 23 of the gasket 3 are compressed and come into close contact with the air circuit forming member 1 and the fixing member 2, so that the air circuit forming The space between the member 1 and the fixing member 2 can be sealed well, and the air circuit passages 4 and 5 and the communication hole 6 can be communicated. Therefore, it is possible to reliably prevent the air from leaking or rainwater or the like from entering the air circuit.
【００２０】また、ガスケット３を空気回路形成部材１
に押し付けると、ビード１０は径方向に弾性変形して内
径が小径化することによりビス１１の雄ねじが形成され
ていない基部側外周面に圧接されるため、ビス１１とビ
ス挿通孔２１との隙間を良好にシールする。したがっ
て、平座金２７を用いても雨水がビス取付孔８を通って
空気回路形成部材１とガスケット３の隙間やビス用ねじ
孔７に浸入するおそれがなく、図７に示したシールワッ
シャ１２が不要で、良好なシール性能を得ることができ
る。さらに、ビード１０はビス１１との摩擦力によって
ビス１１の回転を阻止し緩み止め機能を果たすため、ビ
ス１１をビス用ねじ孔７にねじ込むとき、ばね座金を必
ずしも用いる必要がない。The gasket 3 is connected to the air circuit forming member 1.
When the bead 10 is pressed, the bead 10 is elastically deformed in the radial direction and the inner diameter is reduced, so that the bead 10 is pressed against the outer peripheral surface of the screw 11 on which the male screw is not formed, so that the gap between the screw 11 and the screw insertion hole 21 is formed. Seals well. Therefore, even if the flat washer 27 is used, there is no possibility that rainwater will pass through the screw mounting hole 8 and enter the gap between the air circuit forming member 1 and the gasket 3 or the screw hole 7 for screws, and the seal washer 12 shown in FIG. It is unnecessary and good sealing performance can be obtained. Further, since the bead 10 prevents the rotation of the screw 11 by the frictional force with the screw 11 and performs the function of preventing loosening, it is not always necessary to use a spring washer when screwing the screw 11 into the screw hole 7.
【００２１】また、ピン２５は空気回路形成部材１と固
定部材２との間隔を設定するので、ビス１１を締め過ぎ
てビード１０，２２，２３を破損するおそれもない。Further, since the pin 25 sets the distance between the air circuit forming member 1 and the fixing member 2, there is no possibility that the beads 10, 22, and 23 are damaged by overtightening the screw 11.
【００２２】図４（ａ）は本発明の他の実施の形態を示
すビス止めする前の断面図、（ｂ）はビス止めした状態
を示す断面図である。この実施の形態においては、空気
回路形成部材１のビス用ねじ孔７の開口部に固定部材２
に向かって拡径するテーパ状の凹部３０を形成し、この
凹部３０内にガスケット３のビード１０の下半部を収納
するようにしている。ビス用ねじ孔７の軸線に対する凹
部３０のテーパ面の交差角度θは３０°程度が好まし
い。FIG. 4A is a cross-sectional view showing another embodiment of the present invention before screwing, and FIG. 4B is a cross-sectional view showing a state in which the screw is fixed. In this embodiment, the fixing member 2 is inserted into the screw screw hole 7 of the air circuit forming member 1.
A concave portion 30 having a tapered shape which expands in diameter is formed, and the lower half of the bead 10 of the gasket 3 is accommodated in the concave portion 30. The intersection angle θ of the tapered surface of the concave portion 30 with respect to the axis of the screw hole 7 is preferably about 30 °.
【００２３】このような構成において、ビス１１をビス
取付孔８およびビス挿通孔２１に挿通しビス用ねじ孔７
にねじ込み固定部材２によりガスケット３を空気回路形
成部材１に押し付けると、ビード１０は（ｂ）図に示す
ように凹部３０内に押し込まれビス１１と凹部３０とで
挾まれる。また、凹部３０のテーパ面はビード１０をビ
ス１１に押し付け密接させる。したがって、ビス１１と
ビード１０との間に隙間が生じず、ビス挿通孔２１およ
びビス用ねじ孔７を良好にシールすることができる。In such a configuration, the screw 11 is inserted into the screw mounting hole 8 and the screw insertion hole 21 so that the screw hole 7 for the screw is inserted.
When the gasket 3 is pressed against the air circuit forming member 1 by the screw fixing member 2, the bead 10 is pushed into the concave portion 30 as shown in FIG. Further, the tapered surface of the concave portion 30 presses the bead 10 against the screw 11 so as to be in close contact therewith. Therefore, no gap is formed between the screw 11 and the bead 10, and the screw insertion hole 21 and the screw hole 7 for the screw can be sealed well.
【００２４】図５は本発明のさらに他の実施の形態を示
す断面図である。この実施の形態においては、空気回路
形成部材１の表面でビス用ねじ孔７の周囲にその全周を
取り囲む環状壁３４を一体に突設し、この環状壁３４の
内側にガスケット３のビード１０の下半部を収納するよ
うにしている。環状壁３４の内壁とビス用ねじ孔７との
交差角度θは３０°程度が好ましい。FIG. 5 is a sectional view showing still another embodiment of the present invention. In this embodiment, an annular wall 34 which surrounds the entire circumference of the screw hole 7 on the surface of the air circuit forming member 1 is integrally formed with the screw hole 7, and the bead 10 of the gasket 3 is provided inside the annular wall 34. To accommodate the lower half. The intersection angle θ between the inner wall of the annular wall 34 and the screw hole 7 for screws is preferably about 30 °.
【００２５】このような構成においても、環状壁３４の
内部がテーパ状の凹部を形成するため、図４に示した実
施の形態と同様に良好なシール性能を得ることができ
る。Also in such a configuration, since the inside of the annular wall 34 forms a tapered concave portion, good sealing performance can be obtained as in the embodiment shown in FIG.
【００２６】ここで、図５においては、環状壁３４の最
小内径をビス用ねじ孔７の穴径と等しく設定した例を示
したが、これに限らず図６に示すようにビス用ねじ孔７
の穴径より内径が大きい環状壁３４であってもよい、ま
た、その断面形状も図５に示した三角形に限らず、図６
に示す半円形、半楕円形等の適宜な形状とすることがで
きる。FIG. 5 shows an example in which the minimum inner diameter of the annular wall 34 is set equal to the hole diameter of the screw hole 7 for screws. However, the present invention is not limited to this, and as shown in FIG. 7
An annular wall 34 having an inner diameter larger than the diameter of the hole may be used. Further, the cross-sectional shape is not limited to the triangle shown in FIG.
And an appropriate shape such as a semicircle and a semi-ellipse shown in FIG.
【００２７】なお、上記した実施の形態においては、間
隔設定用のピン２５を空気回路形成部材１に突設した例
を示したが、固定部材２に突設してもよい。In the above-described embodiment, an example is shown in which the pin 25 for setting the interval protrudes from the air circuit forming member 1, but it may be protruding from the fixing member 2.
【００２８】[0028]
【発明の効果】以上説明したように本発明に係る空気回
路の構造によれば、ガスケットのビス挿通孔の周囲にビ
ードを一体に設け、このビードをビスに押し付けるよう
に構成したので、ビスによって固定部材とガスケットを
空気回路形成部材に固定するだけで固定部材とガスケッ
トのビス挿通孔を確実にシールすることができる。した
がって、雨水が空気回路の内部に浸入することがなく、
良好なシール性能を得ることができる。また、ビードが
ビスの回転防止部材として機能するため、ばね座金等を
用いる必要がない。As described above, according to the structure of the air circuit according to the present invention, a bead is integrally provided around the screw insertion hole of the gasket, and the bead is pressed against the screw. Only by fixing the fixing member and the gasket to the air circuit forming member, the screw insertion hole of the fixing member and the gasket can be reliably sealed. Therefore, rainwater does not enter the air circuit,
Good sealing performance can be obtained. Further, since the bead functions as a screw rotation preventing member, it is not necessary to use a spring washer or the like.
【００２９】また、本発明は空気回路形成部材の表面に
ビス用ねじ孔を取り囲むテーパ状の凹部もしくは環状壁
を設けたので、ガスケットのビードをビスに確実に押し
付けることができ、ビスとビードとの間のシール性が一
層向上する。Further, according to the present invention, since the tapered concave portion or the annular wall surrounding the screw hole for the screw is provided on the surface of the air circuit forming member, the bead of the gasket can be surely pressed against the screw. The sealing property between the layers further improves.
【００３０】さらに、本発明は空気回路形成部材もしく
は固定部材に間隔設定用のピンを一体に突設したので、
空気回路形成部材と固定部材の間隔を一定に設定するこ
とができ、ビスの締め過ぎによるビードの破損を防止す
ることができる。Further, according to the present invention, since the pin for setting the interval is integrally provided on the air circuit forming member or the fixing member,
The distance between the air circuit forming member and the fixing member can be set to be constant, and damage to the bead due to excessive tightening of the screw can be prevented.
【図１】 本発明に係る空気回路の構造を示す要部の断
面図である。FIG. 1 is a sectional view of a main part showing a structure of an air circuit according to the present invention.
【図２】 ガスケットの平面図である。FIG. 2 is a plan view of a gasket.
【図３】 同ガスケットの要部の断面図である。FIG. 3 is a sectional view of a main part of the gasket.
【図４】 （ａ）は本発明の他の実施の形態を示すビス
止め前の断面図、（ｂ）はビス止めした状態を示す断面
図である。FIG. 4A is a cross-sectional view showing another embodiment of the present invention before screwing, and FIG. 4B is a cross-sectional view showing a state in which the screw is fixed.
【図５】 本発明のさらに他の実施の形態を示す断面図
である。FIG. 5 is a cross-sectional view showing still another embodiment of the present invention.
【図６】 本発明の他の実施の形態を示す断面図であ
る。FIG. 6 is a cross-sectional view showing another embodiment of the present invention.
【図７】 空気回路の従来の例を示す要部の断面図であ
る。FIG. 7 is a sectional view of a main part showing a conventional example of an air circuit.
１…空気回路形成部材、２…固定部材、３…ガスケッ
ト、４，５…空気回路用通路、６…挿通孔、７…ビス用
ねじ孔、８…ビス取付孔、９…ビス装填孔、１０…ビー
ド、１１…ビス、１２…シールワッシャ、２１…ビス挿
通孔、２２…外周ビード，２３…連結ビード、２５…間
隔設定用ピン、２６…ピン孔、３０…凹部、３４…環状
壁。DESCRIPTION OF SYMBOLS 1 ... Air circuit forming member, 2 ... Fixing member, 3 ... Gasket, 4, 5 ... Air circuit passage, 6 ... Insertion hole, 7 ... Screw screw hole, 8 ... Screw mounting hole, 9 ... Screw loading hole, 10 ... beads, 11 screws, 12 seal washers, 21 screw insertion holes, 22 peripheral beads, 23 connection beads, 25 spacing pins, 26 pin holes, 30 recesses, 34 annular walls.
Claims (3)
孔を有するガスケットを空気回路形成部材と固定部材と
の間に介在させ、前記ガスケットと固定部材をビスによ
って前記空気回路形成部材に固定し前記ビードを前記空
気回路形成部材と固定部材に押し付けることにより、こ
れら両部材に設けた空気回路用通路を前記挿通孔を介し
て連通させた空気回路の構造において、 前記ガスケットに設けられ前記ビスが挿通されるビス挿
通孔の開口縁に、前記ビスの周面に密接される環状のビ
ードを一体に設けたことを特徴とする空気回路の構造。1. A gasket having an insertion hole provided with an annular bead at an opening edge is interposed between an air circuit forming member and a fixing member, and the gasket and the fixing member are fixed to the air circuit forming member by screws. Then, the bead is pressed against the air circuit forming member and the fixing member so that the air circuit passages provided in these members are communicated through the insertion hole. An annular circuit which is integrally provided on an opening edge of a screw insertion hole through which a screw is inserted and which is in close contact with a peripheral surface of the screw.
て、 空気回路形成部材の表面でビスがねじ込まれるビス用ね
じ孔の開口部に、ガスケットのビードを収納するテーパ
状の凹部もしくは環状壁を設けたことを特徴とする空気
回路の構造。2. A structure of an air circuit according to claim 1, wherein a tapered recess or an annular wall for accommodating a bead of a gasket is provided in an opening of a screw screw hole into which a screw is screwed on a surface of the air circuit forming member. An air circuit structure characterized by being provided.
て、 空気回路形成部材と固定部材のいずれか一方に間隔設定
用のピンを設け、ガスケットにこのピンが挿通するピン
孔を設けたことを特徴とする空気回路の構造。3. The air circuit structure according to claim 1, wherein one of the air circuit forming member and the fixing member is provided with a pin for setting an interval, and the gasket is provided with a pin hole through which the pin is inserted. Characteristic air circuit structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9360296A JPH11190433A (en) | 1997-12-26 | 1997-12-26 | Structure of air circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9360296A JPH11190433A (en) | 1997-12-26 | 1997-12-26 | Structure of air circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11190433A true JPH11190433A (en) | 1999-07-13 |
Family
ID=18468791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9360296A Pending JPH11190433A (en) | 1997-12-26 | 1997-12-26 | Structure of air circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11190433A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011171761A (en) * | 2011-04-28 | 2011-09-01 | Kenwood Corp | Waterproof structure and packing |
| JP2011181950A (en) * | 2011-04-28 | 2011-09-15 | Kenwood Corp | Waterproof structure, and packing |
| JP2015015422A (en) * | 2013-07-08 | 2015-01-22 | 三菱電機株式会社 | Case for waterproof power supply device, and waterproof power supply device |
| JP2020113535A (en) * | 2019-01-09 | 2020-07-27 | モレックス エルエルシー | Electric connection device |
-
1997
- 1997-12-26 JP JP9360296A patent/JPH11190433A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011171761A (en) * | 2011-04-28 | 2011-09-01 | Kenwood Corp | Waterproof structure and packing |
| JP2011181950A (en) * | 2011-04-28 | 2011-09-15 | Kenwood Corp | Waterproof structure, and packing |
| JP2015015422A (en) * | 2013-07-08 | 2015-01-22 | 三菱電機株式会社 | Case for waterproof power supply device, and waterproof power supply device |
| JP2020113535A (en) * | 2019-01-09 | 2020-07-27 | モレックス エルエルシー | Electric connection device |
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