JP2601215Y2 - Case for flow sensor - Google Patents
Case for flow sensorInfo
- Publication number
- JP2601215Y2 JP2601215Y2 JP1993029385U JP2938593U JP2601215Y2 JP 2601215 Y2 JP2601215 Y2 JP 2601215Y2 JP 1993029385 U JP1993029385 U JP 1993029385U JP 2938593 U JP2938593 U JP 2938593U JP 2601215 Y2 JP2601215 Y2 JP 2601215Y2
- Authority
- JP
- Japan
- Prior art keywords
- case
- joint
- flow sensor
- securing
- annular projection
- 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.)
- Expired - Lifetime
Links
Landscapes
- Measuring Volume Flow (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は流量センサ用ケースの改
良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a case for a flow sensor.
【０００２】[0002]
【従来の技術】本願考案者は、シャワートイレ、浄水
器、瞬間湯沸器等の流量検流用に好適な小形の流量セン
サを先に提案した（特開平５−９９７１１号公報参
照）。この流量センサは、流路を形成する筒状のケース
を複数のプラスチック部品で構成し、これ等の部品内に
計量用羽根車を回転可能に収納して、部品同志を水密的
に接合して一体化する構造であった。2. Description of the Related Art The inventor of the present application has previously proposed a small-sized flow sensor suitable for flow detection of a shower toilet, a water purifier, an instantaneous water heater and the like (see Japanese Patent Application Laid-Open No. 5-99711). In this flow sensor, a cylindrical case forming a flow path is composed of a plurality of plastic parts, and a measuring impeller is rotatably housed in these parts, and the parts are joined in a watertight manner. The structure was integrated.
【０００３】この種の流量センサにおけるケースの接合
構造を図２に示す。プラスチックからなる第１と第２の
筒状ケース１と２は、軸線Ｘ−Ｘを同軸にして嵌合され
て超音波接合で水密的に溶着される。第１のケース１の
小径部１Ａは、第２のケース２の凹部２Ａに嵌入され、
小径部１Ａの先端面（図示下端面）に突出形成した環状
突起（いわゆる引張用ビート）１Ｂが、第２のケース２
の肩部に当接して超音波で溶着される。このようにして
環状突起１Ｂ（引張用ビート）が溶けて相手側の第２の
ケースと溶着して両ケース１と２が接合された状態を図
３に示す。FIG. 2 shows a joint structure of a case in this type of flow sensor. The first and second cylindrical cases 1 and 2 made of plastic are fitted to each other with the axis XX being coaxial, and are water-tightly welded by ultrasonic bonding. The small diameter portion 1A of the first case 1 is fitted into the concave portion 2A of the second case 2,
An annular projection (a so-called pulling beat) 1B protruding from the distal end surface (the lower end surface in the figure) of the small diameter portion 1A is provided in the second case 2
Is brought into contact with the shoulder and is welded by ultrasonic waves. FIG. 3 shows a state in which the annular projections 1B (tensile beats) have been melted and welded to the second case on the mating side and the two cases 1 and 2 have been joined.
【０００４】[0004]
【考案が解決しようとする課題】前記従来の技術では、
引張用ビートと称している環状突起１Ｂで、必要な接合
強度を得ようとすると、水密性が損なわれ、同環状突起
１Ｂで水密性を重視して両ケースを接合すると引張強度
が十分に得られないという問題点があった。因みに、流
路にかかる水圧は２ＭＰａである。そこで、従来は環状
突起１Ｂで引張強度に耐えるようにし、水密性はゴムシ
ールなど別の方法で行なっていた。そのために、構造が
複雑となりコスト高になるという問題点があった。SUMMARY OF THE INVENTION In the above prior art,
In order to obtain the required joining strength with the annular projection 1B called a pulling beat, the water tightness is impaired. There was a problem that it could not be done. Incidentally, the water pressure applied to the flow path is 2 MPa. Therefore, conventionally, the annular projection 1B is made to withstand the tensile strength, and the watertightness is performed by another method such as a rubber seal. Therefore, there has been a problem that the structure becomes complicated and the cost increases.
【０００５】本考案は上記にかんがみ、超音波接合だけ
で、水密確保と引張強度の確保の両方ができる流量計の
ケース構造を提供することを目的とする。[0005] In view of the above, an object of the present invention is to provide a case structure of a flow meter which can secure both watertightness and tensile strength only by ultrasonic bonding.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するため
に、第１の考案は、プラスチックからなる第１と第２の
ケースを超音波接合して一体とする流量センサにおい
て、水密確保用の接合箇所と引張強度確保用の接合箇所
とを設け、これ等各接合箇所に溶着用環状突起を形成し
たものである。SUMMARY OF THE INVENTION In order to achieve the above object, a first invention is to provide a flow sensor for securing water tightness in a flow sensor in which a first case and a second case made of plastic are joined by ultrasonic bonding. A joint portion and a joint portion for securing tensile strength are provided, and a circular projection for welding is formed at each of these joint portions.
【０００７】第２の考案は、上記水密確保用の接合箇所
を第１と第２のケースの円筒状嵌合部に設け、引張強度
確保用の接合箇所を両ケースの突合わせ部に設けたもの
である。In a second aspect of the present invention, the joint for securing watertightness is provided at the cylindrical fitting portions of the first and second cases, and the joint for securing tensile strength is provided at the butted portion of the two cases. Things.
【０００８】[0008]
【作用】第１と第２のケース（３）、（４）を超音波接
合すると、溶着用環状突起（４Ｄ）が溶けて両ケースの
円筒状嵌合部（３Ａ）（４Ａ）の隙間を広範囲にわたっ
て埋めることで水密性が確保される。更に突合わせ部端
面（３Ｂ）の環状突起（３ｃ）が溶けて他方のケースの
端面（４Ｂ）と接合して軸方向の引張強度を確保する。When the first and second cases (3) and (4) are ultrasonically joined, the welding annular projection (4D) is melted and the gap between the cylindrical fitting portions (3A) and (4A) of both cases is melted. Filling over a wide area ensures watertightness. Further, the annular projection (3c) on the end face (3B) of the butted portion is melted and joined to the end face (4B) of the other case to secure the tensile strength in the axial direction.
【０００９】[0009]
【実施例】図１の実施例で、３は第１のケース、４は第
２のケースで、軸線Ｙ−Ｙを有する筒形のプラスチック
製部品である。３Ａは円筒状嵌合部、３Ｂは突合わせ部
でその先端に溶着用環状突起３Ｃが形成されている。
又、第２のケース４には円筒状嵌合部４Ａ、突合わせ部
４Ｂ及び円筒状嵌合部４Ａの外周に突出する溶着用環状
突起４Ｄが形成されている。なお、第１のケース３の円
筒状嵌合部３Ａの内径は第２のケース４の円筒状嵌合部
４Ａの外径よりわずかに大きく定められ、円筒状嵌合部
３Ａに円筒状嵌合部４Ａが嵌合（遊合）するようになっ
ている。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in FIG. 1, reference numeral 3 denotes a first case, and 4 denotes a second case, which is a cylindrical plastic part having an axis YY. Reference numeral 3A denotes a cylindrical fitting portion, and 3B denotes an abutting portion. An annular projection 3C for welding is formed at the tip.
Further, the second case 4 is formed with a cylindrical fitting portion 4A, a butt portion 4B, and a welding annular projection 4D protruding from the outer periphery of the cylindrical fitting portion 4A. The inner diameter of the cylindrical fitting portion 3A of the first case 3 is set slightly larger than the outer diameter of the cylindrical fitting portion 4A of the second case 4, and the cylindrical fitting portion 3A is fitted to the cylindrical fitting portion 3A. The part 4A is adapted to fit (play).
【００１０】第１のケース３の円筒状嵌合部３Ａに、第
２のケース４の円筒状嵌合部４Ａを図示のように臨ませ
て、両ケース３、４を上下方向から圧接して超音波をか
けると、溶着用環状突起４Ｄが溶けて、円筒状嵌合３Ａ
と４Ａの隙間に広く入り込んで、両ケース間の水密を確
保する。又、接合工程の終りで、環状突起３Ｃが溶け
て、端面４Ｂと接合され引張強度が確保される。The cylindrical fitting portion 4A of the second case 4 faces the cylindrical fitting portion 3A of the first case 3 as shown in FIG. When an ultrasonic wave is applied, the welding annular projection 4D is melted, and the cylindrical fitting 3A is formed.
And 4A widely to ensure watertightness between the two cases. Further, at the end of the joining step, the annular projection 3C is melted and joined to the end face 4B to secure the tensile strength.
【００１１】因みに、水密用の環状突起４Ｄだけを設け
た構造では、２ＭＰａの水圧まで水漏れは生じなかった
が、それ以上の水圧で溶着部が破壊された。又、引張強
度確保用の環状突起３Ｃだけを設けた構造では、２ＭＰ
ａの水圧で溶着部破壊はみられないが水漏れが発生し
た。ところが、図１の本願の実施例では１０ＭＰａまで
水漏れ溶着部破壊とも発生しなかった。By the way, in the structure provided with only the watertight annular projection 4D, no water leakage occurred up to a water pressure of 2 MPa, but the welded portion was destroyed by a water pressure higher than 2 MPa. Further, in a structure in which only the annular projection 3C for securing the tensile strength is provided, 2MP
No breakage of the weld was observed at the water pressure of a, but water leakage occurred. However, in the embodiment of the present invention shown in FIG. 1, no breakage of the welded weld portion occurred up to 10 MPa.
【００１２】[0012]
【考案の効果】本考案の流量センサ用ケースは上述のよ
うに構成されているので、ゴムシール等の特別の部品を
必要とせず、構造、組立が簡単になるばかりでなく、水
密確保と、引張強度確保が１回の超音波接合で実現で
き、流量計のコストダウンと小形化に貢献する。[Effects of the Invention] Since the flow sensor case of the present invention is constructed as described above, it does not require special parts such as rubber seals, not only simplifies the structure and assembly, but also ensures watertightness and tension. Strength can be secured by one ultrasonic bonding, which contributes to cost reduction and downsizing of the flow meter.
【図１】 本考案の実施例の要部縦断面図。FIG. 1 is a longitudinal sectional view of a main part of an embodiment of the present invention.
【図２】 従来技術の縦断面図。FIG. 2 is a longitudinal sectional view of a conventional technique.
【図３】 従来技術の縦断面図。FIG. 3 is a longitudinal sectional view of a conventional technique.
３…第１のケース、４…第２のケース、３Ａ，４Ａ…円
筒状嵌合部分、３Ｂ，４Ｂ…突合わせ部、３Ｃ…溶着用
環状突起、４Ｄ…溶着用環状突起。Reference numeral 3 denotes a first case, 4 denotes a second case, 3A, 4A denotes a cylindrical fitting portion, 3B, 4B denotes a butt portion, 3C denotes a welding annular projection, and 4D denotes a welding annular projection.
Claims (2)
スを超音波接合して一体とする流量センサにおいて、水
密確保用の接合箇所と引張強度確保用の接合箇所とを設
け、これ等各接合箇所に溶着用環状突起を形成した流量
センサ用ケース。1. A flow sensor in which a first case and a second case made of plastic are ultrasonically joined to form a single unit, a joint for securing watertightness and a joint for securing tensile strength are provided. A case for a flow rate sensor in which an annular projection for welding is formed at a location.
ースの円筒状嵌合部に設け、引張強度確保用の接合箇所
を両ケースの突合わせ部に設けた請求項１記載の流量セ
ンサ用ケース。2. The joint according to claim 1, wherein a joint for securing water tightness is provided at a cylindrical fitting portion of the first and second cases, and a joint for securing tensile strength is provided at a butt portion of the two cases. Case for flow sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993029385U JP2601215Y2 (en) | 1993-06-02 | 1993-06-02 | Case for flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993029385U JP2601215Y2 (en) | 1993-06-02 | 1993-06-02 | Case for flow sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0687825U JPH0687825U (en) | 1994-12-22 |
| JP2601215Y2 true JP2601215Y2 (en) | 1999-11-15 |
Family
ID=12274676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993029385U Expired - Lifetime JP2601215Y2 (en) | 1993-06-02 | 1993-06-02 | Case for flow sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2601215Y2 (en) |
-
1993
- 1993-06-02 JP JP1993029385U patent/JP2601215Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0687825U (en) | 1994-12-22 |
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