JP2002168718A - Pressure sensor - Google Patents
Pressure sensorInfo
- Publication number
- JP2002168718A JP2002168718A JP2000365272A JP2000365272A JP2002168718A JP 2002168718 A JP2002168718 A JP 2002168718A JP 2000365272 A JP2000365272 A JP 2000365272A JP 2000365272 A JP2000365272 A JP 2000365272A JP 2002168718 A JP2002168718 A JP 2002168718A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pressure sensor
- flange member
- joint
- detecting element
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、流体の圧力を電気
信号に変換して外部に出力する圧力センサに関する。特
に、組立て構造を改良した圧力センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure sensor for converting the pressure of a fluid into an electric signal and outputting the electric signal to the outside. In particular, it relates to a pressure sensor having an improved assembly structure.
【０００２】[0002]
【背景技術】図７は、従来の圧力センサの構造を示して
いる。この圧力センサは、鎖線で示す管などの被設置部
Ａにねじ込まれる継手５０と、この継手５０に溶接され
た圧力検出素子５１と、この圧力検出素子５１で検出し
た圧力に応じた電気信号を外部へ出力する出力手段５２
とを備えている。継手５０は、外周に前記被設置部Ａに
ねじ込まれる雄ねじ５３が形成された本体部５４の中心
部に、流体圧を導入する圧力導入孔５５が形成され、上
面中央部にテーパ状に拡開した接合部５６が継手５０の
面より上方に突出するように形成されている。また、本
体部５４の上部にはフランジ５７が一体に形成され、こ
のフランジ５７の上面外周には薄肉の加締部５８が切削
形成されている。2. Description of the Related Art FIG. 7 shows a structure of a conventional pressure sensor. The pressure sensor includes a joint 50 screwed into a portion A to be installed such as a pipe indicated by a chain line, a pressure detecting element 51 welded to the joint 50, and an electric signal corresponding to the pressure detected by the pressure detecting element 51. Output means 52 for outputting to outside
And In the joint 50, a pressure introduction hole 55 for introducing fluid pressure is formed in the center of a main body 54 in which a male screw 53 screwed into the installation portion A is formed on the outer periphery. The joined portion 56 is formed so as to protrude above the surface of the joint 50. Further, a flange 57 is integrally formed on the upper portion of the main body 54, and a thin caulked portion 58 is cut and formed on the outer periphery of the upper surface of the flange 57.
【０００３】接合部５６には圧力検出素子５１が溶接さ
れ、また、フランジ５７の上面には金属製のケース５９
が溶接で接合されている。ケース５９と加締部５８との
間には、コネクタとなるハウジング６０の下端部がＯリ
ング６１を介して嵌め込まれ、かつ、加締部５８によっ
て加締め固定されている。ケース５９に折曲加工された
突起部５９Ａには、圧力検出素子５１を囲む筒状の台座
６２が保持されている。また、ケース５９の上部内側に
は切り起こし加工された支持片６３が設けられ、この支
持片６３に前記圧力検出素子５１に接続される回路基板
６４が支持されている。A pressure detecting element 51 is welded to a joint 56, and a metal case 59 is provided on the upper surface of the flange 57.
Are joined by welding. A lower end of a housing 60 serving as a connector is fitted between the case 59 and the caulking portion 58 via an O-ring 61 and is caulked and fixed by the caulking portion 58. A cylindrical pedestal 62 that surrounds the pressure detecting element 51 is held by the protrusion 59A bent into the case 59. A support piece 63 cut and raised is provided inside the upper portion of the case 59, and a circuit board 64 connected to the pressure detecting element 51 is supported by the support piece 63.
【０００４】[0004]
【発明が解決しようとする課題】従来の圧力センサにお
いては、継手５０の本体部５４とフランジ５７とが一体
となった構造であるため、次のような不都合が生じる。
すなわち、圧力検出素子５１を接合部５６に溶接するた
めには、接合部５６がフランジ５７の面より上方に突出
している必要がある。なぜなら、接合部５６がフランジ
５７の面より引っ込んでいると、狭い箇所で斜め上方か
ら圧力検出素子５１を接合部５６に溶接することにな
り、これは溶接線の目合わせなどの溶接管理作業が困難
となる。ところが、このように接合部５６がフランジ５
７の面より上方に突出することは、それだけ圧力センサ
の全長が長くなり、大型化するという問題がある。In the conventional pressure sensor, the following inconvenience occurs because the main body 54 of the joint 50 and the flange 57 are integrally formed.
That is, in order to weld the pressure detecting element 51 to the joint 56, the joint 56 needs to protrude above the surface of the flange 57. Because, when the joint 56 is retracted from the surface of the flange 57, the pressure detecting element 51 is welded to the joint 56 from a diagonally upper portion in a narrow place, which is a welding management operation such as alignment of welding lines. It will be difficult. However, as described above, the joining portion 56 is
Protruding above the surface 7 causes a problem that the total length of the pressure sensor becomes longer and the size of the pressure sensor becomes larger.
【０００５】また、圧力センサの外径を大きくしないた
めには、回路基板６４は圧力検出素子５１の上方に配置
する必要があるが、従来は、圧力検出素子５１がフラン
ジ５７の面より上方へ突出した位置にあるため、さら
に、回路基板６４を支持片６３などで支持して圧力検出
素子５１から離して配置しなけばならず、これも圧力セ
ンサの全長が長くなる要因である。また、ハウジング６
０を固定する加締部５８は、切削加工で薄肉部とするた
め、加工に手間がかかり、コスト高の要因となってい
る。In order to prevent the outer diameter of the pressure sensor from increasing, the circuit board 64 must be disposed above the pressure detecting element 51. However, conventionally, the pressure detecting element 51 is positioned above the surface of the flange 57. Since it is at the protruding position, the circuit board 64 must be further supported by the support pieces 63 and arranged separately from the pressure detecting element 51, which is also a factor of increasing the overall length of the pressure sensor. Also, the housing 6
Since the caulking portion 58 for fixing 0 is formed into a thin portion by cutting, it takes time and effort to process, which is a factor of high cost.
【０００６】本発明の目的は、このような課題を解消
し、全長を短くでき、かつ、溶接線の目合わせなどの作
業を容易にするとともに、加締め部の切削加工を不要に
してコスト低減を図った圧力センサを提供するにある。SUMMARY OF THE INVENTION An object of the present invention is to solve such problems, shorten the overall length, facilitate the work of welding line alignment, and reduce the cost by eliminating the need for cutting the crimped portion. To provide a pressure sensor that achieves the above.
【０００７】[0007]
【課題を解決するための手段】本発明の圧力センサは、
上記目的を達成するため、継手、フランジ部材および接
合部材を分離し、これを接合することによって、圧力検
出素子をフランジ部材から突出させない構成としてあ
る。具体的には、圧力導入孔を有する継手と、この継手
に取り付けられ前記圧力導入孔に導入された流体の圧力
を電気信号に変換する圧力検出素子と、この圧力検出素
子の出力側に設けられるハウジングとを備えた圧力セン
サであって、前記継手に接合されかつ中央部に前記圧力
検出素子を収納するための貫通孔を有するフランジ部材
と、このフランジ部材に接合され前記ハウジングを固定
する接合部材とを備えたことを特徴とする。The pressure sensor according to the present invention comprises:
In order to achieve the above object, the joint, the flange member, and the joining member are separated from each other and joined to prevent the pressure detecting element from projecting from the flange member. Specifically, a joint having a pressure introduction hole, a pressure detection element attached to the joint and converting the pressure of the fluid introduced into the pressure introduction hole into an electric signal, and an output side of the pressure detection element A pressure sensor comprising a housing, a flange member joined to the joint and having a through hole at a central portion for receiving the pressure detection element, and a joining member joined to the flange member to fix the housing And characterized in that:
【０００８】このような本発明においては、継手と、フ
ランジ部材とを分離して両者を接合する構造としたこと
により、継手に圧力検出素子を溶接した後にフランジ部
材を接合することができ、これにより、フランジ部材の
ない露出した部分で圧力検出素子を突き合わせ溶接で
き、溶接線の目合わせなどの作業が容易になる。また、
圧力検出素子がフランジ部材の上面より突出しないよう
に配置できるため、圧力センサの全長を短くすることが
可能となる。また、接合部材も別体としたので、フラン
ジ部材に加締め用の薄肉部を切削加工する必要がなく、
コスト低減が可能である。In the present invention, since the joint and the flange member are separated from each other and joined together, the flange member can be joined after welding the pressure detecting element to the joint. Thereby, the pressure detecting element can be butt-welded at the exposed portion without the flange member, and operations such as welding line alignment can be facilitated. Also,
Since the pressure detecting element can be arranged so as not to protrude from the upper surface of the flange member, it is possible to shorten the entire length of the pressure sensor. Also, since the joining member is also a separate body, there is no need to cut the thin part for caulking on the flange member,
Cost reduction is possible.
【０００９】また、本発明の圧力センサにおいて、前記
フランジ部材の上面には、前記圧力検出素子に接続され
る回路基板を配置することが好ましい。なお、回路基板
を配置するにあたっては、接着剤などで固定することが
好ましい。このような場合には、回路基板をフランジ部
材上に直接配置することで圧力センサの全長を短くする
ことが可能となる。しかも、回路基板をフランジ部材上
に直接配置したので、回路基板を圧力検出素子の真上に
支持するための支持台なども不要にできるから、部品点
数の削減、コスト低減が可能である。In the pressure sensor according to the present invention, it is preferable that a circuit board connected to the pressure detecting element is disposed on an upper surface of the flange member. Note that when arranging the circuit board, it is preferable to fix the circuit board with an adhesive or the like. In such a case, it is possible to shorten the entire length of the pressure sensor by disposing the circuit board directly on the flange member. In addition, since the circuit board is disposed directly on the flange member, a support base for supporting the circuit board directly above the pressure detecting element can be eliminated, so that the number of parts and the cost can be reduced.
【００１０】また、本発明の圧力センサにおいて、前記
接合部材は、内周壁の外側に環状溝を挟んで外壁を備え
る構成とし、かつ、この外壁を加締部として構成し、環
状溝に前記ハウジングの下端縁を嵌め込み、前記加締部
で前記ハウジングを加締めて固定するように構成するこ
とが好ましい。このような場合には、接合部材は金属材
料のプレス加工などで簡単かつ安価に製作できるととも
に、接合部材の外壁を変形させて加締めるだけでハウジ
ングを簡易に固定することができる。この際、ハウジン
グの下端部と外壁または内周壁との間にシール部材（た
とえば、Ｏリングなど）を介在させてもよい。ここで、
外壁は、内周壁の外側に全周に亘って設けられていても
よいが、内周壁の外側数カ所に部分的に設けてもよい。In the pressure sensor according to the present invention, the joining member has an outer wall sandwiching an annular groove outside the inner peripheral wall, and the outer wall is formed as a caulking portion, and the housing is formed in the annular groove. It is preferable that the lower end edge of the housing is fitted, and the housing is caulked and fixed by the caulking portion. In such a case, the joining member can be easily and inexpensively manufactured by pressing a metal material or the like, and the housing can be easily fixed simply by deforming and caulking the outer wall of the joining member. In this case, a seal member (for example, an O-ring) may be interposed between the lower end of the housing and the outer wall or the inner peripheral wall. here,
The outer wall may be provided over the entire outer periphery of the inner peripheral wall, or may be provided partially at several places outside the inner peripheral wall.
【００１１】また、本発明の圧力センサにおいて、前記
接合部材は、前記内周壁の上端縁に複数の切欠により分
割されて内方に折曲げ可能な折曲縁を備える構成とし、
この折曲縁によって前記回路基板に接続される端子台を
前記回路基板上に加締め固定するように構成することが
好ましい。このような場合には、接合部材に端子台の加
締め機能を持たせることができるとともに、折曲縁の外
周でＯリングのガイド機能も併せ持つことができる。Further, in the pressure sensor according to the present invention, the joining member has a bent edge which is divided by a plurality of notches at an upper end edge of the inner peripheral wall and can be bent inward,
It is preferable that the terminal board connected to the circuit board be crimped and fixed on the circuit board by the bent edge. In such a case, the joining member can have the function of caulking the terminal block, and can also have the function of guiding the O-ring at the outer periphery of the bent edge.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。 〔第１実施形態〕図１は、本実施形態に係る圧力センサ
の断面図、図２〜図５は各部品の断面図である。本実施
形態に係る圧力センサＳは、鎖線で示す管などの被設置
部Ａにねじ込まれる継手１と、この継手１にビーム溶接
された圧力検出素子２と、継手１上に固着されたフラン
ジ部材３と、圧力検出素子２で検出した圧力に応じた電
気信号を外部へ出力する出力手段４とを備えている。出
力手段４のハウジング５は接合部材６を介してフランジ
部材３に固定されている。Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a sectional view of a pressure sensor according to the present embodiment, and FIGS. 2 to 5 are sectional views of respective parts. The pressure sensor S according to the present embodiment includes a joint 1 screwed into an installation portion A such as a pipe shown by a chain line, a pressure detecting element 2 beam-welded to the joint 1, and a flange member fixed on the joint 1. 3 and output means 4 for outputting an electric signal corresponding to the pressure detected by the pressure detecting element 2 to the outside. The housing 5 of the output means 4 is fixed to the flange member 3 via the joining member 6.
【００１３】図２は、圧力検出素子２の構造例である。
圧力検出素子２は、機械的強度、耐蝕性およびばね性に
優れた金属、たとえば、析出硬化系ステンレス鋼（ＳＵ
Ｓ６３０など）で構成された筒状の支持台８の上面に流
体の圧力を受けて変形する薄肉状の金属ダイアフラム９
が一体に形成され、この金属ダイアフラム９の上面に圧
力（圧力に比例した金属ダイアフラム９の変形量）を電
気信号に変換する歪みゲージ１０が設けられている。FIG. 2 is a structural example of the pressure detecting element 2.
The pressure detecting element 2 is made of a metal having excellent mechanical strength, corrosion resistance and spring properties, for example, precipitation hardening stainless steel (SU)
S630) a thin metal diaphragm 9 that is deformed under the pressure of fluid on the upper surface of the cylindrical support base 8
Are formed integrally, and a strain gauge 10 for converting pressure (amount of deformation of the metal diaphragm 9 in proportion to the pressure) into an electric signal is provided on an upper surface of the metal diaphragm 9.
【００１４】図３は、継手１の構造例である。継手１
は、外周に前記被設置部Ａにねじ込まれる雄ねじ１１が
形成された本体部１２を有する。本体部１２には、その
中心部に流体圧を導入する圧力導入孔１３が貫通形成さ
れ、上部にフランジ１４が形成され、上面中央部に上方
へ突出した突合せ接合部１５が形成されている。継手１
の材質は流体の圧力レンジにより使い分けることが好ま
しい。すなわち、低・中圧レンジ（たとえば、１００Ｍ
Ｐａ以下）においては、フェライト系またはオーステナ
イト系ステンレス鋼（ＳＵＳ４３０、ＳＵＳ３０４）な
どが好適であり、高圧レンジ（たとえば、１００ＭＰａ
以上）においては、析出系ステンレス鋼（ＳＵＳ６３
０）などが好適である。FIG. 3 shows an example of the structure of the joint 1. Fitting 1
Has a main body portion 12 on the outer periphery of which a male screw 11 screwed into the installation portion A is formed. A pressure introduction hole 13 for introducing a fluid pressure is formed through the main body 12 at the center thereof, a flange 14 is formed at an upper portion, and a butt joint 15 protruding upward is formed at the center of the upper surface. Fitting 1
It is preferable to use different materials according to the pressure range of the fluid. That is, the low / medium pressure range (for example, 100M
(Pa or lower), ferritic or austenitic stainless steel (SUS430, SUS304) or the like is preferable, and a high-pressure range (for example, 100 MPa) is preferable.
In the above), precipitation stainless steel (SUS63
0) and the like are preferable.
【００１５】図４は、フランジ部材３の構造例である。
フランジ部材３は、継手１を被設置部Ａに固定するため
の部材で、この例では、外形が多角形状（つまり、スパ
ナやレンチなどで回転させることができる多角形状）の
本体部２５を備える。本体部２５には、その中央部に前
記圧力検出素子２を収納するための貫通孔２６が形成さ
れ、かつ、上面に浅い形状の凹部２７が形成されてい
る。凹部２７には、前記圧力検出素子２に接続される回
路基板３０が接着剤３１を介して配置されるとともに、
その外周に前記接合部材３が接合される。なお、フラン
ジ部材３の材質は、ステンレス鋼がよいが、溶接性、強
度、耐蝕性に問題がなければ、一般鋼でも構わない。FIG. 4 shows an example of the structure of the flange member 3.
The flange member 3 is a member for fixing the joint 1 to the installation portion A. In this example, the flange member 3 includes a main body 25 having a polygonal outer shape (that is, a polygonal shape that can be rotated with a spanner, a wrench, or the like). . A through hole 26 for accommodating the pressure detecting element 2 is formed in the center of the main body 25, and a shallow recess 27 is formed on the upper surface. In the recess 27, a circuit board 30 connected to the pressure detection element 2 is disposed via an adhesive 31,
The joining member 3 is joined to the outer periphery. The material of the flange member 3 is preferably stainless steel, but general steel may be used as long as there is no problem in weldability, strength, and corrosion resistance.
【００１６】図５は、接合部材６の構造例である。接合
部材６は、金属材料（ステンレス鋼あるいは一般鋼）の
プレス加工によって、円筒状内周壁２０の外側に環状溝
２４を挟んで外壁２１を備えた形状に成形されている。
具体的には、円筒状内周壁２０の下端部から外側に向か
って環状の底壁６ａが形成され、この底壁６ａの外周縁
から上方に向かって直角に起立した外壁２１が形成さ
れ、つまり、内周壁２０、底壁６ａ、外壁２１によって
片側断面がＵ字形となった２重筒形状に形成されてい
る。FIG. 5 shows a structural example of the joining member 6. The joining member 6 is formed by pressing a metal material (stainless steel or general steel) into a shape having an outer wall 21 with an annular groove 24 interposed therebetween outside a cylindrical inner peripheral wall 20.
Specifically, an annular bottom wall 6a is formed outward from the lower end of the cylindrical inner peripheral wall 20, and an outer wall 21 is formed which rises perpendicularly upward from the outer peripheral edge of the bottom wall 6a. , The inner peripheral wall 20, the bottom wall 6a, and the outer wall 21 are formed in a double cylindrical shape having a U-shaped cross section on one side.
【００１７】外壁２１は、上端部の一部が加締め時にハ
ウジング５の形状に沿って内側へ変形される加締部とし
て構成されている。底壁６ａは、フランジ部材３の上面
凹部２７に接合される。内周壁２０の上端縁には複数箇
所の切欠２２が形成されて複数に分割され、この分割部
分が内向きに折曲可能な折曲縁２３Ａ，２３Ｂとして形
成されている。これらの折曲縁２３Ａ，２３Ｂのうち、
対向する２つの折曲縁２３Ａを除く他の折曲縁２３Ｂに
ついては、予め、内向きに折り曲げられているが、対向
する２つの折曲縁２３Ａについては、前記回路基板３０
に端子３２を介して接続される端子台３３の加締め時に
内側へ折り曲げられる。これにより、端子台３３がフラ
ンジ部材３上に加締め固定されるようになっている。な
お、折曲縁２３Ａの数は３以上でもよく、また、折曲縁
２３Ａの位置も等間隔など相互に離れていればよい。ま
た、折曲縁２３Ｂの上端外周は、後述のようにＯリング
挿入案内として利用できるようになっている。The outer wall 21 is formed as a caulking portion in which a part of the upper end is deformed inward along the shape of the housing 5 when caulking. The bottom wall 6a is joined to the upper surface recess 27 of the flange member 3. A plurality of cutouts 22 are formed at the upper end edge of the inner peripheral wall 20 and are divided into a plurality of portions, and the divided portions are formed as bent edges 23A and 23B that can be bent inward. Of these bent edges 23A and 23B,
The other bent edges 23B except for the two opposed bent edges 23A are bent inward in advance, but the two opposed bent edges 23A are
Is bent inward when the terminal block 33 connected via the terminal 32 is crimped. Thereby, the terminal block 33 is fixed by caulking on the flange member 3. The number of the bent edges 23A may be three or more, and the positions of the bent edges 23A may be mutually separated such as at equal intervals. Further, the outer periphery of the upper end of the bent edge 23B can be used as an O-ring insertion guide as described later.
【００１８】次に、圧力センサの組立て手順を説明す
る。継手１の突合せ接合部１５の上面に圧力検出素子２
の下面を電子ビーム溶接などで接合する。次に、継手１
のフランジ１４の上面にフランジ部材３をリングプロジ
ェクション溶接などで接合する。これにより、圧力検出
素子２はフランジ部材３の貫通孔２６内に収容された状
態となる（図１参照）。なお、フランジ部材３と継手１
の接合はねじ止めであってもよい。次に、フランジ部材
３の凹部２７に接合部材６の底壁６ａを嵌めてリングプ
ロジェクション溶接などで接合する。Next, the procedure for assembling the pressure sensor will be described. Pressure sensing element 2 is provided on the upper surface of butt joint 15 of joint 1.
Are joined by electron beam welding or the like. Next, joint 1
The flange member 3 is joined to the upper surface of the flange 14 by ring projection welding or the like. Thus, the pressure detecting element 2 is in a state of being housed in the through hole 26 of the flange member 3 (see FIG. 1). In addition, the flange member 3 and the joint 1
May be screwed. Next, the bottom wall 6a of the joining member 6 is fitted into the concave portion 27 of the flange member 3 and joined by ring projection welding or the like.
【００１９】以上のようにして、継手１、圧力検出素子
２、フランジ部材３および接合部材６の組立てが終わる
と、フランジ部材３上に回路基板３０を接着剤３１を介
して組付ける。この回路基板３０に端子３２および端子
台３３を接合する。端子台３３は、接合部材６の折曲縁
２３Ａで加締めることにより回路基板３０上に圧接固定
される。回路基板３０の出力調整を行った後、端子台３
３の外周にガスケット３５を挿入し、ハウジング５を組
付ける。端子台３３からターミナル３４がハウジング５
内に突出している。When the assembly of the joint 1, the pressure detecting element 2, the flange member 3 and the joining member 6 is completed as described above, the circuit board 30 is mounted on the flange member 3 via the adhesive 31. The terminal 32 and the terminal block 33 are joined to the circuit board 30. The terminal block 33 is pressed and fixed on the circuit board 30 by caulking with the bent edge 23A of the joining member 6. After adjusting the output of the circuit board 30, the terminal block 3
The gasket 35 is inserted into the outer periphery of the housing 3 and the housing 5 is assembled. Terminal 5 from terminal block 33 to housing 5
It protrudes into.
【００２０】ハウジング５は、有底円筒部３６の下部に
径が拡大した取付部３７が形成されており、この取付部
３７を接合部材６の環状溝２４にＯリング４０を介して
嵌め込み、接合部材６の加締部２１を取付部３７に加締
めることにより固定している。なお、Ｏリング４０の挿
入は、接合部材６の折曲縁２３Ｂの外周のテーパ面を案
内として利用することにより、簡単に挿入できる。The housing 5 has a mounting portion 37 having an enlarged diameter formed below the bottomed cylindrical portion 36. The mounting portion 37 is fitted into the annular groove 24 of the joining member 6 via an O-ring 40, and is joined. The caulked portion 21 of the member 6 is fixed by caulking to the mounting portion 37. The O-ring 40 can be easily inserted by using the tapered surface on the outer periphery of the bent edge 23B of the joining member 6 as a guide.
【００２１】このような本実施形態によれば、以下のよ
うな効果がある。 （１）継手１と、フランジ部材３とを分離して作成し、
両者を接合する構造としたことにより、継手１に圧力検
出素子２を溶接した後にフランジ部材３を接合すること
ができる。これにより、フランジ部材３のない露出した
突合せ接合部１５に圧力検出素子２を突き合わせ溶接で
き、溶接線の目合わせなどの管理作業が容易になる。According to this embodiment, the following effects can be obtained. (1) The joint 1 and the flange member 3 are separately prepared.
With the structure in which both are joined, the flange member 3 can be joined after the pressure detecting element 2 is welded to the joint 1. Thereby, the pressure detection element 2 can be butt-welded to the exposed butt joint 15 without the flange member 3, and management work such as alignment of welding lines becomes easy.
【００２２】（２）圧力検出素子２がフランジ部材３内
に収まり、フランジ部材３の上面より突出しないように
配置でき、このため、回路基板３０をフランジ部材３上
に直接配置することができるから、圧力センサの全長を
短くすることが可能となる。しかも、回路基板３０をフ
ランジ部材３上に直接配置したので、回路基板３０を圧
力検出素子２の真上に支持するための支持台なども不要
にできるから、部品点数の削減、コスト低減が可能であ
る。(2) The pressure detecting element 2 can be disposed so as to fit within the flange member 3 and not protrude from the upper surface of the flange member 3, so that the circuit board 30 can be disposed directly on the flange member 3. Thus, the overall length of the pressure sensor can be reduced. In addition, since the circuit board 30 is disposed directly on the flange member 3, a support base for supporting the circuit board 30 directly above the pressure detecting element 2 can be eliminated, so that the number of parts and cost can be reduced. It is.
【００２３】（３）接合部材６を別体とし、かつ、内周
壁２０の外周に環状溝２４を挟んで外壁２１を持った形
状とし、この外壁２１をハウジング５の加締部２１とし
た構成であるので、接合部材６は金属材料のプレス加工
などで簡単に製作でき、継手１の切削加工などが不要で
あるため安価に製作できる。 （４）接合部材６の内周壁２０の上縁を内側へ折曲して
折曲縁２３Ａ，２３Ｂを形成したので、この折曲縁２３
Ａによって端子台３３の固定および折曲縁２３Ｂによっ
てＯリング４０の挿入案内が可能となる。 （５）フランジ部材３の上面に凹部２７を形成し、この
凹部２７内に接合部材６の底壁６ａを嵌めて、リングプ
ロジェクション溶接によって接合したので、溶接部を凹
部２７によって隠すことができるから、外観を良好に仕
上げることができる。なお、フランジ部材３の上面に凹
部２７を形成することなく、直接接合部材６を接合する
ようにしてもよい。(3) A structure in which the joining member 6 is formed as a separate body, and the outer peripheral wall of the inner peripheral wall 20 has an outer wall 21 with an annular groove 24 interposed therebetween. Therefore, the joining member 6 can be easily manufactured by press working of a metal material or the like, and can be manufactured at low cost because cutting and the like of the joint 1 are unnecessary. (4) Since the upper edges of the inner peripheral wall 20 of the joining member 6 are bent inward to form the bent edges 23A and 23B, the bent edges 23 are formed.
A allows the terminal block 33 to be fixed and the bent edge 23B to guide the insertion of the O-ring 40. (5) Since the concave portion 27 is formed on the upper surface of the flange member 3 and the bottom wall 6a of the joining member 6 is fitted into the concave portion 27 and joined by ring projection welding, the welded portion can be hidden by the concave portion 27. The appearance can be excellently finished. The joining member 6 may be directly joined without forming the concave portion 27 on the upper surface of the flange member 3.
【００２４】〔第２実施形態〕図６は、本発明に係る圧
力センサＳの第２実施形態を示している。なお、この実
施形態の説明にあたって、第１実施形態と同一構成要件
については、同一符号を付し、その説明を省略もしくは
簡略化する。本実施形態では、継手１において、本体部
１２の外周に溝１６が形成され、この溝１６にシール部
材としてのＯリング１７が装着されている。圧力センサ
Ｓを被設置部Ａに挿入した後、押え板１９でフランジ部
材３を押えて、圧力センサＳを被設置部Ａに固定するよ
うにしている。また、この第２実施形態のフランジ部材
３は、下面に突出部１８を備える。これにより、フラン
ジ部材３の高さを圧力検出素子２の上面高さ位置に合わ
せている。[Second Embodiment] FIG. 6 shows a second embodiment of the pressure sensor S according to the present invention. In the description of this embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted or simplified. In the present embodiment, in the joint 1, a groove 16 is formed on the outer periphery of the main body 12, and an O-ring 17 as a seal member is mounted in the groove 16. After the pressure sensor S is inserted into the installation portion A, the flange member 3 is pressed by the holding plate 19 so that the pressure sensor S is fixed to the installation portion A. Further, the flange member 3 of the second embodiment has a projection 18 on the lower surface. Thereby, the height of the flange member 3 is adjusted to the height position of the upper surface of the pressure detecting element 2.
【００２５】このような本実施形態によれば、前記
（１）〜（５）の効果に加え、次の効果を得ることがで
きる。 （６）継手１はねじに代えてＯリング１７によるシール
手段を持っているので、被設置部Ａに雌ねじを有しない
場合でも取付け可能である。 （７）フランジ部材３は下面に突出部１８を形成するこ
とでフランジ部材３の厚みを薄くすることができる。According to this embodiment, the following effects can be obtained in addition to the effects (1) to (5). (6) Since the joint 1 has a sealing means using an O-ring 17 instead of a screw, the joint 1 can be attached even if the installation portion A does not have a female screw. (7) The thickness of the flange member 3 can be reduced by forming the protrusion 18 on the lower surface of the flange member 3.
【００２６】[0026]
【発明の効果】上述したように、本発明の圧力センサに
よれば、継手、フランジ部材および接合部材を分離し、
これを接合するように構成することで、フランジ部材が
取付けられていない継手に圧力検出素子の溶接ができ、
溶接線の目合わせなどの作業が容易になるとともに、圧
力検出素子がフランジ部材面より突出しないため、圧力
センサの全長を短くできる。さらに、接合部材を別体に
することにより、継手に加締め部を切削加工する必要が
なくなり、加工コストの低減が可能となる。As described above, according to the pressure sensor of the present invention, the joint, the flange member and the joining member are separated,
By configuring this to join, the pressure sensing element can be welded to the joint where the flange member is not attached,
Work such as alignment of welding lines is facilitated, and the entire length of the pressure sensor can be shortened because the pressure detection element does not protrude from the flange member surface. Furthermore, by forming the joining member as a separate body, it is not necessary to cut a crimped portion on the joint, and the processing cost can be reduced.
【図１】本発明の第１実施形態に係わる圧力センサを示
す縦断側面図である。FIG. 1 is a vertical sectional side view showing a pressure sensor according to a first embodiment of the present invention.
【図２】同上実施形態の圧力検出素子を示す縦断側面図
である。FIG. 2 is a vertical sectional side view showing the pressure detecting element of the embodiment.
【図３】同上実施形態の継手を示す縦断側面図である。FIG. 3 is a longitudinal sectional side view showing the joint of the embodiment.
【図４】同上実施形態のフランジ部材を示す縦断側面図
である。FIG. 4 is a vertical sectional side view showing the flange member of the embodiment.
【図５】同上実施形態の接合部材を示す縦断側面図であ
る。FIG. 5 is a vertical sectional side view showing the joining member of the embodiment.
【図６】本発明の第２実施形態に係る圧力センサの縦断
側面図である。FIG. 6 is a longitudinal sectional side view of a pressure sensor according to a second embodiment of the present invention.
【図７】従来の圧力センサの縦断側面図である。FIG. 7 is a vertical sectional side view of a conventional pressure sensor.
【符号の説明】 １ 継手 ２ 圧力検出素子 ３ フランジ部材 ４ 出力部 ５ ハウジング ６ 接合部材 １３ 圧力導入孔 ２０ 円筒部 ２１ 加締部 ２２ 切欠 ２３Ａ，２３Ｂ 折曲縁 ２４ 環状溝 ２６ 貫通孔 ３０ 回路基板 ３３ 端子台 Ｓ 圧力センサ[Description of Signs] 1 Joint 2 Pressure detecting element 3 Flange member 4 Output part 5 Housing 6 Joining member 13 Pressure introducing hole 20 Cylindrical part 21 Caulking part 22 Notch 23A, 23B Folded edge 24 Annular groove 26 Through hole 30 Circuit board 33 Terminal block S Pressure sensor
フロントページの続き (72)発明者 今井 敦 東京都大田区東馬込１−30−４ 長野計器 株式会社内 Ｆターム(参考） 2F055 AA40 BB20 CC02 DD01 EE11 FF43 GG01 GG12 HH05 4M112 AA01 BA01 CA15 DA20 GA01Continuation of the front page (72) Inventor Atsushi Imai 1-30-4 Higashimagome, Ota-ku, Tokyo Nagano Keiki Co., Ltd. F-term (reference) 2F055 AA40 BB20 CC02 DD01 EE11 FF43 GG01 GG12 GG12 HH05 4M112 AA01 BA01 CA15 DA20 GA01
Claims (4)
取り付けられ前記圧力導入孔に導入された流体の圧力を
電気信号に変換する圧力検出素子と、この圧力検出素子
の出力側に設けられるハウジングとを備えた圧力センサ
であって、 前記継手に接合されかつ中央部に前記圧力検出素子を収
納するための貫通孔を有するフランジ部材と、このフラ
ンジ部材に接合され前記ハウジングを固定する接合部材
とを備えたことを特徴とする圧力センサ。1. A joint having a pressure introducing hole, a pressure detecting element attached to the joint for converting the pressure of the fluid introduced into the pressure introducing hole into an electric signal, and an output side of the pressure detecting element. A pressure sensor comprising: a housing; a flange member joined to the joint and having a through hole at a center portion for receiving the pressure detection element; and a joining member joined to the flange member to fix the housing. A pressure sensor comprising:
される回路基板が配置されていることを特徴とする圧力
センサ。2. The pressure sensor according to claim 1, wherein a circuit board connected to the pressure detecting element is disposed on an upper surface of the flange member.
ンサにおいて、 前記接合部材は、内周壁の外側に環状溝を挟んで外壁を
備え、この外壁が加締部として形成され、 前記ハウジングは、その下端が前記環状溝に嵌め込ま
れ、かつ、前記加締部によって接合部材に加締め固定さ
れていることを特徴とする圧力センサ。3. The pressure sensor according to claim 1, wherein the joining member has an outer wall with an annular groove interposed outside an inner peripheral wall, and the outer wall is formed as a caulking portion. Is a pressure sensor having a lower end fitted into the annular groove and fixedly secured to the joining member by the caulking portion.
り分割されて内方に折曲げ可能な折曲縁を備え、この折
曲縁によって前記回路基板に接続される端子台が前記回
路基板上に加締め固定されていることを特徴とする圧力
センサ。4. The pressure sensor according to claim 3, wherein the joining member has a bent edge which is divided by a plurality of notches at an upper end edge of the inner peripheral wall and can be bent inward. A pressure sensor, wherein a terminal block connected to the circuit board by an edge is caulked and fixed on the circuit board.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000365272A JP3556165B2 (en) | 2000-11-30 | 2000-11-30 | Pressure sensor |
| US09/997,297 US6584851B2 (en) | 2000-11-30 | 2001-11-29 | Fluid pressure sensor having a pressure port |
| DE60131129T DE60131129T2 (en) | 2000-11-30 | 2001-11-30 | pressure sensor |
| EP01310063A EP1211496B1 (en) | 2000-11-30 | 2001-11-30 | Pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000365272A JP3556165B2 (en) | 2000-11-30 | 2000-11-30 | Pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002168718A true JP2002168718A (en) | 2002-06-14 |
| JP3556165B2 JP3556165B2 (en) | 2004-08-18 |
Family
ID=18836075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000365272A Expired - Fee Related JP3556165B2 (en) | 2000-11-30 | 2000-11-30 | Pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3556165B2 (en) |
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|---|---|---|---|---|
| JP2005531012A (en) * | 2002-06-22 | 2005-10-13 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Equipment for pressure measurement |
| JP2008511833A (en) * | 2004-08-27 | 2008-04-17 | アシュクロフト−ナガノ インコーポレーテッド | Pressure measuring system and method |
| US7370536B2 (en) | 2004-08-26 | 2008-05-13 | Fuji Electric Device Technology Co., Ltd. | Pressure sensor device and pressure sensor cell thereof |
| US7412894B2 (en) | 2003-08-29 | 2008-08-19 | Fuji Electric Device Technology Co., Ltd. | Pressure sensing device incorporating pressure sensing chip in resin case |
| JP2009210551A (en) * | 2008-03-03 | 2009-09-17 | Wika Alexander Wiegand Gmbh & Co Kg | Sensor assembly and use of sensor assembly |
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|---|---|---|---|---|
| JP2005531012A (en) * | 2002-06-22 | 2005-10-13 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Equipment for pressure measurement |
| US7412894B2 (en) | 2003-08-29 | 2008-08-19 | Fuji Electric Device Technology Co., Ltd. | Pressure sensing device incorporating pressure sensing chip in resin case |
| US7370536B2 (en) | 2004-08-26 | 2008-05-13 | Fuji Electric Device Technology Co., Ltd. | Pressure sensor device and pressure sensor cell thereof |
| JP2008511833A (en) * | 2004-08-27 | 2008-04-17 | アシュクロフト−ナガノ インコーポレーテッド | Pressure measuring system and method |
| JP2009210551A (en) * | 2008-03-03 | 2009-09-17 | Wika Alexander Wiegand Gmbh & Co Kg | Sensor assembly and use of sensor assembly |
| JP6054862B2 (en) * | 2011-02-25 | 2016-12-27 | 本田技研工業株式会社 | In-cylinder pressure detection device for a direct fuel injection internal combustion engine |
| US9587612B2 (en) | 2011-02-25 | 2017-03-07 | Honda Motor Co., Ltd. | In-cylinder pressure detecting device of direct injection type internal combustion engine |
| KR101395850B1 (en) * | 2013-10-01 | 2014-05-16 | 주식회사 현대케피코 | Device for measuring pressure |
| KR101538225B1 (en) * | 2013-10-28 | 2015-07-23 | 주식회사 현대케피코 | device for measuring pressure |
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| US10151656B2 (en) | 2015-09-25 | 2018-12-11 | Nagano Keiki Co., Ltd. | Pressure sensor configured to detect pressure of fluid to be measured that embrittles material |
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