JP4926914B2

JP4926914B2 - Pressure detector

Info

Publication number: JP4926914B2
Application number: JP2007283303A
Authority: JP
Inventors: 岳松永
Original assignee: Panasonic Electric Works SUNX Co Ltd
Current assignee: Panasonic Industrial Devices SUNX Co Ltd
Priority date: 2007-10-31
Filing date: 2007-10-31
Publication date: 2012-05-09
Anticipated expiration: 2027-10-31
Also published as: JP2009109396A

Description

本発明は、例えば気体などの流体が流通可能又は貯留可能に形成された流体配管などの被取付部材に対して該被取付部材内の前記流体の圧力を検出可能な態様で取着される圧力検出器に関する。 The present invention is a pressure that is attached in such a manner that the pressure of the fluid in the attached member can be detected with respect to the attached member such as a fluid pipe formed such that a fluid such as gas can flow or be stored. It relates to a detector.

一般に、流体配管などの被取付部材内の流体の圧力を検出する場合には、被取付部材に貫通形成された貫通孔（被取着部）を塞ぐように圧力検出器を取着し、該圧力検出器が出力した電気信号に基づき被取付部材内の流体の圧力を検出するようにしている。そのため、こうした圧力検出器を被取付部材に取着する場合には、その被取付部材における被取着部に対して該被取付部材内の流体の圧力を検出可能な取着態様で圧力検出器を取着する必要がある。そこで、このような被取付部材に流体の圧力を検出可能な態様で取着される圧力検出器として、例えば特許文献１に記載の圧力検出器が従来から提案されている。 Generally, when detecting the pressure of fluid in a member to be attached such as a fluid pipe, a pressure detector is attached so as to close a through hole (attached portion) formed through the member to be attached, The pressure of the fluid in the mounted member is detected based on the electrical signal output from the pressure detector. Therefore, when such a pressure detector is attached to a member to be attached, the pressure detector in an attachment manner capable of detecting the pressure of the fluid in the member to be attached to the attachment portion of the member to be attached. Need to be installed. Thus, for example, a pressure detector described in Patent Document 1 has been conventionally proposed as a pressure detector attached to such a member to be attached in a manner capable of detecting the pressure of the fluid.

この特許文献１に記載の圧力検出器は、内部に圧力センサが収容されてなる検出器本体と、該検出器本体を流体配管（被取付部材）に貫通形成された雌ねじ孔（被取着部）に取着するための取着部とを有している。取着部は、検出器本体に対して回転自在に支持された平面視多角形状の回転部材を有しており、該回転部材からは検出器本体の反対側に向けて略円筒形状の軸部が同心上に突設されている。この軸部の外周面には流体配管の雌ねじ孔に対する螺合を可能ならしめる雄ねじ加工が施されると共に、軸部及び回転部材の軸心部分には圧力検出器が軸部を被取付部材の雌ねじ孔に螺合させた場合に被取付部材内と検出器本体内とを連通させるための流体流路が形成されている。 The pressure detector described in Patent Document 1 includes a detector main body in which a pressure sensor is accommodated, and a female screw hole (attachment portion) formed by penetrating the detector main body into a fluid pipe (attached member). And an attaching portion for attaching to the case. The attachment portion has a polygonal rotating member in plan view that is rotatably supported with respect to the detector main body, and a substantially cylindrical shaft portion from the rotating member toward the opposite side of the detector main body. Projecting concentrically. The outer peripheral surface of the shaft portion is subjected to male threading that enables the threaded engagement of the fluid piping with the female screw hole, and a pressure detector is attached to the shaft portion of the shaft portion and the rotating member. A fluid flow path is formed for communicating the inside of the attached member and the inside of the detector body when screwed into the female screw hole.

そして、被取付部材に圧力検出器を取着する場合には、まず圧力検出器における軸部の先端を被取付部材の雌ねじ孔に位置合わせした後、検出器本体よりも被取付部材側に位置する回転部材を圧力検出器の側方からスパナなどの挟持工具によって挟み、この状態で挟持工具を利用して回転部材を回転させる。すると、この回転部材と一体の軸部が被取付部材の雌ねじ孔内に螺入されるため、これにより圧力検出器が被取付部材に取着される。そして、その取着状態において、圧力センサが軸部及び回転部材内の流体流路を介して検出器本体内に流入する流体の圧力をセンシングし、該センシング結果に応じた電気信号を制御装置に向けて出力するようになっていた。
特開２００２−１６８７１４号公報 When attaching the pressure detector to the attached member, first, the tip of the shaft portion of the pressure detector is aligned with the female screw hole of the attached member, and then positioned closer to the attached member than the detector body. The rotating member is sandwiched by a clamping tool such as a spanner from the side of the pressure detector, and the rotating member is rotated using the clamping tool in this state. Then, since the shaft portion integral with the rotating member is screwed into the female screw hole of the attached member, the pressure detector is attached to the attached member. In the attached state, the pressure sensor senses the pressure of the fluid flowing into the detector main body via the fluid passage in the shaft portion and the rotating member, and an electric signal corresponding to the sensing result is sent to the control device. It came to output toward.
JP 2002-168714 A

ところで、一つの被取付部材に対して複数個の圧力検出器を取着する場合には、被取付部材上でのスペースの関係上、各圧力検出器を互いに接近させた状態で取着することがある。しかしながら、被取付部材に取着された各圧力検出器のうち取り外しを所望する一つの圧力検出器（以下、「所望圧力検出器」という。）を被取付部材から取り外す場合には、該所望圧力検出器の回転部材を側方から挟もうとする挟持工具が隣接する他の圧力検出器に接触し、該他の圧力検出器が所望圧力検出器を取り外す際の障害となることがある。そのため、この場合には、所望圧力検出器を取り外す前に、他の圧力検出器を被取付部材から先に取り外す必要があった。 By the way, when a plurality of pressure detectors are attached to one attached member, the pressure detectors are attached in a state of being close to each other due to the space on the attached member. There is. However, when one pressure detector that is desired to be removed (hereinafter referred to as “desired pressure detector”) is removed from each of the pressure detectors attached to the attached member, the desired pressure is removed. A clamping tool that attempts to pinch the rotating member of the detector from the side may come into contact with another adjacent pressure detector, and this other pressure detector may become an obstacle when removing the desired pressure detector. Therefore, in this case, before removing the desired pressure detector, it is necessary to first remove the other pressure detector from the attached member.

また、所望圧力検出器のみを被取付部材から容易に取り外せるようにする場合には、互いに隣り合う圧力検出器間のスペースを広くする必要があるため、狭いスペースに複数の圧力検出器を取着することが困難になってしまう。すなわち、特許文献１に記載の圧力検出器では、被取付部材に取着する際の配置自由度が低いという問題があった。 In addition, when only the desired pressure detector can be easily removed from the mounted member, it is necessary to widen the space between the pressure detectors adjacent to each other. It becomes difficult to do. That is, the pressure detector described in Patent Document 1 has a problem that the degree of freedom in arrangement when attaching to the attached member is low.

本発明は、このような事情に鑑みてなされたものであり、その目的は、被取付部材に取着する際の配置自由度を向上させることができる圧力検出器を提供することにある。 This invention is made | formed in view of such a situation, The objective is to provide the pressure detector which can improve the arrangement | positioning freedom degree at the time of attaching to a to-be-attached member.

上記目的を達成するために、圧力検出器にかかる請求項１に記載の発明は、流体が流通可能又は貯留可能に形成された被取付部材に対して該被取付部材内の前記流体の圧力を検出可能な態様で取着される圧力検出器であって、断面円形状をなす貫通孔が所定軸線方向に沿って延びるように貫通形成されると共に、前記貫通孔に交差しない位置であって且つ該貫通孔の側方側に前記流体の圧力を検出可能な流体圧検出部が収容される本体ケースと、該本体ケースの前記貫通孔内に前記軸線を中心に回転可能な状態で挿着された回転部材と、該回転部材内を介して前記流体を前記本体ケース内の前記流体圧検出部側に向けて誘導するための流体流路とを備え、前記流体圧検出部には、前記流体流路内の流体の圧力に応じた電気信号を出力する圧力検出素子が設けられ、前記電気信号を外部に出力するための電気ケーブルは、前記回転部材と前記圧力検出素子とを結ぶ直線に沿った方向に延設され、前記本体ケースにおいて前記貫通孔及び前記流体圧検出部を前記軸線方向と交差する方向から挟む配置態様となる両側面は、平面状に形成され、前記回転部材は、前記軸線方向において前記本体ケースの一面側に位置する第１端部と、前記軸線方向において前記本体ケースの前記一面側とは反対面側に位置する第２端部とを有し、前記第１端部の先端面が、前記本体ケースの前記一面と面一となる位置又は該一面よりも前記本体ケースの外側となる位置に配置され、前記第１端部には、前記回転部材の回転に伴い前記軸線方向に沿った螺合運動が可能なねじ部が形成されると共に、前記第２端部には、前記回転部材を回転させるための工具が前記本体ケースの前記一面側とは反対面側から前記軸線方向に沿って係合可能な係合部が設けられ、前記流体流路は、前記第１端部側から前記回転部材における前記軸線方向の中途部位まで形成された第１誘導流路と、該第１誘導流路内の流体を前記流体圧検出部側に誘導する第２誘導流路とを有し、前記貫通孔内において前記第２誘導流路よりも前記第１端部側となる位置及び前記第２端部側となる位置には、前記回転部材の外周面と前記貫通孔の内周面との間から前記第２誘導流路内の流体が本体ケース外へ流出することを規制する第１シール部材及び第２シール部材がそれぞれ設けられたことを要旨とする。 In order to achieve the above object, the invention according to claim 1 relating to a pressure detector is characterized in that the pressure of the fluid in the attached member is determined with respect to the attached member formed so that fluid can flow or be stored. A pressure detector attached in a detectable manner, wherein a through hole having a circular cross section is formed so as to extend along a predetermined axial direction, and is a position not intersecting with the through hole, and A main body case in which a fluid pressure detection unit capable of detecting the pressure of the fluid is accommodated on the side of the through hole, and is inserted into the through hole of the main body case so as to be rotatable about the axis. And a fluid flow path for guiding the fluid toward the fluid pressure detection unit side in the main body case through the rotation member, and the fluid pressure detection unit includes the fluid Pressure to output an electrical signal according to the pressure of the fluid in the flow path An output cable is provided, and an electric cable for outputting the electric signal to the outside extends in a direction along a straight line connecting the rotating member and the pressure detection element. Both side surfaces, which are arranged to sandwich the fluid pressure detection unit from a direction intersecting the axial direction, are formed in a planar shape, and the rotating member is a first end portion located on one surface side of the main body case in the axial direction. And a second end located on the opposite side to the one surface side of the main body case in the axial direction, and a front end surface of the first end portion is flush with the one surface of the main body case. Or a screw portion that can be screwed in the axial direction along with the rotation of the rotating member at the first end portion. And the second The part is provided with an engaging part that allows a tool for rotating the rotating member to be engaged along the axial direction from the side opposite to the one side of the main body case, A first guide channel formed from the first end side to the midway portion of the rotating member in the axial direction, and a second guide for guiding the fluid in the first guide channel to the fluid pressure detection unit side And a position on the first end side and a position on the second end side with respect to the second guide flow path in the through hole, and an outer peripheral surface of the rotating member and the position The gist is that a first seal member and a second seal member are provided to restrict the fluid in the second guide channel from flowing out of the main body case from between the inner peripheral surface of the through hole.

上記構成によれば、圧力検出器を被取付部材から取り外す場合には、回転部材の第２端部に設けられた係合部に対して工具を本体ケースの一面側とは反対面側から軸線方向に沿って係合させ、工具を利用して回転部材を回転させる。すると、回転部材の第１端部側に設けられたねじ部と被取付部材との螺合状態が解消され、圧力検出器が被取付部材から取り外される。この際、被取付部材上において複数の圧力検出器が互いに接近した状態で取着されていたとしても、取り外しを所望する圧力検出器（以下、「所望圧力検出器」という。）を被取付部材から取り外す際に、該所望圧力検出器に隣接する他の圧力検出器と工具とが接触することはない。そのため、所望圧力検出器を被取付部材から取り外すために、他の圧力検出器を被取付部材からわざわざ取り外す必要がない。したがって、被取付部材に取着する際の配置自由度を向上させることができる。 According to the above configuration, when the pressure detector is removed from the attached member, the tool is moved from the opposite side of the main body case to the engaging portion provided at the second end of the rotating member. Engage along the direction and rotate the rotating member using a tool. Then, the screwed state between the threaded portion provided on the first end portion side of the rotating member and the mounted member is eliminated, and the pressure detector is removed from the mounted member. At this time, even if a plurality of pressure detectors are attached to each other on the attached member, a pressure detector desired to be removed (hereinafter referred to as “desired pressure detector”) is attached to the attached member. During removal from the tool, the tool does not come into contact with other pressure detectors adjacent to the desired pressure detector. Therefore, in order to remove the desired pressure detector from the attached member, it is not necessary to bother to remove another pressure detector from the attached member. Therefore, it is possible to improve the degree of freedom in arrangement when attaching to the attached member.

また、圧力検出器を被取付部材に取着した際に、回転部材の第１端部と被取付部材との間に本体ケースの一部が介在することはない。そのため、回転部材の第１端部と被取付部材との間に本体ケースの一部が介在する構成の場合とは異なり、圧力検出器を被取付部材に取着する際に回転部材を過剰に回転させてしまったとしても、本体ケースが変形したり破損したりすることが抑制される。したがって、本体ケースの変形や破損を抑制するための部材を別途設けることを回避できる結果、部品点数の増加が抑制される。 Further, when the pressure detector is attached to the attached member, a part of the main body case is not interposed between the first end portion of the rotating member and the attached member. Therefore, unlike the case where a part of the main body case is interposed between the first end of the rotating member and the mounted member, the rotating member is excessively attached when the pressure detector is attached to the mounted member. Even if it is rotated, the main body case is prevented from being deformed or damaged. Therefore, as a result of avoiding separately providing a member for suppressing deformation and breakage of the main body case, an increase in the number of parts is suppressed.

また、回転部材の外周面と貫通孔の内周面との間を介して、誘導流路内の流体が外部に流出したり、外部から塵や埃などの異物が流体流路内に流入したりすることが規制される。 In addition, the fluid in the guide channel flows out through the space between the outer peripheral surface of the rotating member and the inner peripheral surface of the through hole, and foreign matter such as dust or dust flows into the fluid channel from the outside. Is regulated.

さらに、電気ケーブルは、回転部材と圧力検出素子とを結ぶ直線に沿った方向に延設されるため、電気ケーブルと圧力検出素子との接続部位も、上記直線上に配置される。そのため、回転部材、圧力検出素子及び上記接続部位が一直線上に配置されない構成の場合に比して、圧力検出器全体のコンパクト化を図ることができる。 Furthermore, since the electric cable is extended in a direction along a straight line connecting the rotating member and the pressure detection element, a connection portion between the electric cable and the pressure detection element is also arranged on the straight line. Therefore, the pressure detector as a whole can be made more compact as compared to a configuration in which the rotating member, the pressure detection element, and the connection portion are not arranged in a straight line.

請求項２に記載の発明は、請求項１に記載の圧力検出器において、前記回転部材は、前記貫通孔内に前記軸線方向に沿った方向から挿入されるようになっており、前記貫通孔は、前記回転部材の挿入方向後側における通路断面積のほうが前記回転部材の挿入方向前側における通路断面積よりも広くなるように形成されると共に、前記第１シール部材及び第２シール部材は、円環状をなすようにそれぞれ形成されており、前記第１シール部材及び第２シール部材のうち前記挿入方向前側に配置されるシール部材は、その外径が前記挿入方向後側に配置されるシール部材の外径よりも小さくなるように形成されていることを要旨とする。 According to a second aspect of the present invention, in the pressure detector according to the first aspect, the rotating member is inserted into the through hole from a direction along the axial direction. Is formed such that the passage sectional area on the rear side in the insertion direction of the rotating member is wider than the passage sectional area on the front side in the insertion direction of the rotating member, and the first seal member and the second seal member are Each of the first seal member and the second seal member that is formed in an annular shape and disposed on the front side in the insertion direction is a seal whose outer diameter is disposed on the rear side in the insertion direction. The gist is that it is formed to be smaller than the outer diameter of the member.

もし仮に挿入方向前側（例えば本体ケースの反対面側）に位置するシール部材（例えば第２シール部材）の外径の大きさが挿入方向後側（本体ケースの一面側）に位置するシール部材（例えば第１シール部材）の外径の大きさ以上であったとすると、第２シール部材と貫通孔の内周面との間の摺動抵抗が大きくなり過ぎて、第２シール部材が破損してしまうおそれがある。この点、本発明では、挿入方向前側に位置するシール部材の外径の大きさが挿入方向後側に位置するシール部材の外径の大きさ未満であるため、本体ケースの貫通孔内に回転部材を挿入する際に、挿入方向前側に位置するシール部材が破損することが回避される。 If the seal member (for example, the second seal member) located on the front side in the insertion direction (for example, the opposite side of the main body case) has a seal member (for example, the second seal member) positioned on the rear side in the insertion direction (one surface side of the main body case) For example, if it is larger than the outer diameter of the first seal member), the sliding resistance between the second seal member and the inner peripheral surface of the through hole becomes too large, and the second seal member is damaged. There is a risk that. In this respect, in the present invention, since the outer diameter of the seal member located on the front side in the insertion direction is less than the outer diameter of the seal member located on the rear side in the insertion direction, the seal member rotates into the through hole of the main body case. When inserting a member, it is avoided that the seal member located in the insertion direction front side is damaged.

請求項３に記載の発明は、請求項１又は請求項２に記載の圧力検出器において、前記係合部は、前記貫通孔における前記本体ケースの前記反対面側の開口端面よりも前記本体ケースの内側となる位置に配置されていることを要旨とする。 According to a third aspect of the present invention, in the pressure detector according to the first or second aspect, the engagement portion is located in the main body case with respect to the opening end surface on the opposite surface side of the main body case in the through hole. The gist is that it is arranged at a position on the inside.

上記構成によれば、係合部が本体ケース内に配置されているため、作業者が不用意に回転部材の係合部に接触することが回避される。
請求項４に記載の発明は、請求項１〜請求項３のうち何れか一項に記載の圧力検出器において、前記本体ケースは、前記軸線方向から見た平面視において、前記貫通孔が形成された部分における前記流体圧検出部とは反対側の外周縁が前記軸線を中心とした円弧状又は前記流体圧検出部から離間するほど幅狭になる形状に形成されていることを要旨とする。 According to the said structure, since the engaging part is arrange | positioned in a main body case, it is avoided that an operator carelessly contacts the engaging part of a rotation member.
According to a fourth aspect of the present invention, in the pressure detector according to any one of the first to third aspects, the main body case is formed with the through hole in a plan view as viewed from the axial direction. The gist of the invention is that the outer peripheral edge on the opposite side to the fluid pressure detecting portion is formed in an arc shape centered on the axis or a shape that becomes narrower as it is separated from the fluid pressure detecting portion. .

上記構成によれば、本体ケースのうち貫通孔が形成された部分が平面視矩形状をなすように形成された場合に比して、被取付部材上において複数の圧力検出器をより接近させた状態で配置できる。そのため、被取付部材上の限られたスペース内により多くの圧力検出器を配置できる。 According to the above configuration, the plurality of pressure detectors are brought closer to each other on the attached member as compared with the case where the portion where the through hole is formed in the main body case has a rectangular shape in plan view. Can be placed in a state. Therefore, more pressure detectors can be arranged in a limited space on the attached member.

本発明によれば、被取付部材に取着する際の配置自由度を向上させることができる。 ADVANTAGE OF THE INVENTION According to this invention, the arrangement | positioning freedom degree at the time of attaching to a to-be-attached member can be improved.

（第１の実施形態）
以下、本発明を具体化した第１の実施形態を図１〜図４に従って説明する。なお、以下における本明細書中の説明において、「前後方向」、「左右方向」、「上下方向」をいう場合は図１に矢印で示す前後方向、左右方向、上下方向をそれぞれ示すものとする。 (First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In the following description of the present specification, the terms “front-rear direction”, “left-right direction”, and “up-down direction” indicate the front-rear direction, the left-right direction, and the up-down direction indicated by arrows in FIG. .

図１及び図２に示すように、本実施形態の圧力検出器１１は、内部を流体（例えば気体）が流通する被取付部材としての流体配管１２内の流体圧を検出するためのものである。この流体配管１２には、該流体配管１２内と外部とを連通する連通孔１３が貫通形成されており、該連通孔１３の内周面には、雌ねじ加工が施されている。そして、流体配管１２に対して連通孔１３を塞ぐように取着された圧力検出器１１は、流体配管１２内の流体圧に応じた電気信号を図示しない制御装置に電気ケーブル１４を介して出力するようになっている。 As shown in FIGS. 1 and 2, the pressure detector 11 of the present embodiment is for detecting the fluid pressure in a fluid pipe 12 as a mounted member through which fluid (for example, gas) flows. . The fluid pipe 12 is formed with a communication hole 13 that allows the inside of the fluid pipe 12 to communicate with the outside. The inner peripheral surface of the communication hole 13 is internally threaded. The pressure detector 11 attached so as to block the communication hole 13 with respect to the fluid pipe 12 outputs an electrical signal corresponding to the fluid pressure in the fluid pipe 12 to the control device (not shown) via the electric cable 14. It is supposed to be.

次に、圧力検出器１１について、図１〜図３に基づき以下説明する。
図１及び図３に示すように、圧力検出器１１は、断面略円形状をなす貫通孔１５が上下方向（所定軸線方向）に沿って延びるように貫通形成された合成樹脂製の導入側ハウジング１６と、該導入側ハウジング１６の右側に配置される合成樹脂製の検出側ハウジング１７とから構成される本体ケース１８を備えている。導入側ハウジング１６の左側部位は、その外周縁が軸線Ｓ（図２にて一点鎖線で示す。）を中心とした平面視略円弧状をなすように形成されている。また、導入側ハウジング１６の右側面には、図２及び図３に示すように、該右側面から右方に延びる円筒部と、該円筒部の右端部に形成されたフランジ部とからなる係止部１９が設けられている。さらに、導入側ハウジング１６の右側面には、貫通孔１５内と係止部１９内とを連通させるケース内流路２０が形成されている。 Next, the pressure detector 11 will be described below with reference to FIGS.
As shown in FIGS. 1 and 3, the pressure detector 11 includes a synthetic resin introduction side housing in which a through hole 15 having a substantially circular cross section is formed so as to extend along the vertical direction (predetermined axial direction). 16 and a main body case 18 composed of a synthetic resin detection side housing 17 arranged on the right side of the introduction side housing 16. The left side portion of the introduction-side housing 16 is formed so that the outer peripheral edge thereof has a substantially arc shape in plan view with the axis S (indicated by a one-dot chain line in FIG. 2) as the center. As shown in FIGS. 2 and 3, the right side surface of the introduction-side housing 16 includes a cylindrical portion extending rightward from the right side surface and a flange portion formed at the right end portion of the cylindrical portion. A stop 19 is provided. Further, an in-case flow path 20 that allows the inside of the through hole 15 and the inside of the locking portion 19 to communicate with each other is formed on the right side surface of the introduction-side housing 16.

また、導入側ハウジング１６の貫通孔１５の下端には、該貫通孔１５内において通路断面の直径が最も大きい第１径部２１が形成され、貫通孔１５における第１径部２１の上側部位には、第１径部２１よりも通路断面の直径の小さい第２径部２２が形成されている。また、貫通孔１５における第２径部２２の上側部位には、第２径部２２よりも通路断面の直径の小さい第３径部２３が形成され、貫通孔１５における第３径部２３よりも上側部位には、第３径部２３よりも通路断面の直径の小さい第４径部２４が形成されている。そして、貫通孔１５の上端には、通路断面の直径が第３径部２３と同程度の第５径部２５が形成されている。なお、貫通孔１５は、その第２径部２２の上端がケース内流路２０と上下方向において同一位置となるように形成されている。 Further, a first diameter portion 21 having a largest passage cross-sectional diameter in the through-hole 15 is formed at the lower end of the through-hole 15 of the introduction-side housing 16, and is formed at an upper portion of the first diameter portion 21 in the through-hole 15. Is formed with a second diameter portion 22 having a passage diameter smaller than that of the first diameter portion 21. In addition, a third diameter portion 23 having a smaller diameter in the cross section of the passage than the second diameter portion 22 is formed at an upper portion of the second diameter portion 22 in the through hole 15, and is larger than the third diameter portion 23 in the through hole 15. In the upper portion, a fourth diameter portion 24 having a smaller diameter in the passage section than the third diameter portion 23 is formed. A fifth diameter portion 25 having a passage cross-sectional diameter similar to that of the third diameter portion 23 is formed at the upper end of the through hole 15. The through-hole 15 is formed so that the upper end of the second diameter portion 22 is at the same position as the in-case flow path 20 in the vertical direction.

検出側ハウジング１７は、右側が閉塞し且つ左側が開口した有底略四角筒状をなしており、検出側ハウジング１７の左端には、導入側ハウジング１６の係止部１９に係止可能な係止爪２６が設けられている。そして、検出側ハウジング１７は、その係止爪２６と係止部１９とを係止状態にすることにより、その下面が導入側ハウジング１６の下面と面一となるように該導入側ハウジング１６に固定される。この際、検出側ハウジング１７の上面は、導入側ハウジング１６の上面と面一である。また、本体ケース１８（特に検出側ハウジング１７）の各外側面のうち上下方向と直交する方向に位置する前側面及び後側面は、それぞれ平面状をなすように形成されている。 The detection-side housing 17 has a substantially square bottomed shape with the right side closed and the left side opened, and the detection-side housing 17 has a left end that can be locked to the locking portion 19 of the introduction-side housing 16. A pawl 26 is provided. The detection-side housing 17 is brought into the introduction-side housing 16 so that the lower surface thereof is flush with the lower surface of the introduction-side housing 16 by bringing the locking claw 26 and the locking portion 19 into the locked state. Fixed. At this time, the upper surface of the detection-side housing 17 is flush with the upper surface of the introduction-side housing 16. Further, the front side surface and the rear side surface that are positioned in the direction orthogonal to the vertical direction among the outer side surfaces of the main body case 18 (particularly, the detection-side housing 17) are each formed to have a flat shape.

検出側ハウジング１７内には、検出した流体圧に対応した電気信号を出力する圧力検出センサ（流体圧検出部）２８が設けられており、該圧力検出センサ２８は、上記ケース内流路２０と対向するように配置された圧力検出素子２９を備えた構成とされている。この圧力検出素子２９の左端部は、導入側ハウジング１６の係止部１９の円筒部内に位置しており、該圧力検出素子２９の左端部には、その内周面と係止部１９における円筒部の外周面との間の隙間を埋めるためのシールリング３１（例えばＯリング）が装着されている。 A pressure detection sensor (fluid pressure detection unit) 28 that outputs an electrical signal corresponding to the detected fluid pressure is provided in the detection side housing 17, and the pressure detection sensor 28 is connected to the flow path 20 in the case. The pressure detection element 29 is disposed so as to face each other. The left end portion of the pressure detection element 29 is located in the cylindrical portion of the locking portion 19 of the introduction-side housing 16. The left end portion of the pressure detection element 29 has a cylindrical surface in the inner peripheral surface and the locking portion 19. A seal ring 31 (for example, an O-ring) is attached to fill a gap between the outer peripheral surface of each part.

また、圧力検出素子２９には、圧力検出素子２９の右側に配置され、該圧力検出素子２９から出力された電気信号を増幅するための回路基板３０が設けられている。この回路基板３０の右面側には、電気ケーブル１４が電気的に接続されており、該電気ケーブル１４は、回路基板３０から右方に延びるように配線されている。すなわち、電気ケーブル１４は、後述する回転部材３２と圧力検出素子２９とを結ぶ直線に沿った方向に延設されている。 The pressure detection element 29 is provided with a circuit board 30 that is disposed on the right side of the pressure detection element 29 and amplifies an electric signal output from the pressure detection element 29. The electric cable 14 is electrically connected to the right surface side of the circuit board 30, and the electric cable 14 is wired so as to extend rightward from the circuit board 30. That is, the electric cable 14 is extended in a direction along a straight line connecting a rotation member 32 and a pressure detection element 29 described later.

本体ケース１８の貫通孔１５内には、図１及び図２に示すように、該貫通孔１５の形状に対応した略円柱形状をなす金属製の回転部材３２が軸線Ｓを中心に回転可能な状態で装着されている。回転部材３２の下端に位置する第１端部３３は、第１径部２１の通路断面の直径よりも僅かに小さく且つ第２径部２２の通路断面の直径よりも大きい直径を有する形状とされている。そのため、貫通孔１５内において第１端部３３による第１径部２１内から第２径部２２内への移動が規制される結果、回転部材３２は、本体ケース１８に対して上方に移動することが規制される。なお、本実施形態の回転部材３２は、その第１端部３３の下端が本体ケース１８の下面（一面）３４よりも下側に位置するように形成されている。 As shown in FIGS. 1 and 2, a metal rotating member 32 having a substantially cylindrical shape corresponding to the shape of the through hole 15 is rotatable around the axis S in the through hole 15 of the main body case 18. It is installed in a state. The first end portion 33 located at the lower end of the rotating member 32 has a shape that is slightly smaller than the diameter of the passage section of the first diameter portion 21 and larger than the diameter of the passage section of the second diameter portion 22. ing. Therefore, as a result of the movement of the first end portion 33 from the first diameter portion 21 to the second diameter portion 22 in the through hole 15 being restricted, the rotating member 32 moves upward with respect to the main body case 18. Is regulated. The rotating member 32 of the present embodiment is formed such that the lower end of the first end portion 33 is positioned below the lower surface (one surface) 34 of the main body case 18.

第１端部３３の下端面（先端面）には、流体配管１２の連通孔１３内において螺合運動可能なねじ部３５が同心上に一体的に形成されている。このねじ部３５は、円柱形状をなす突起の外周面に雄ねじ加工を施すことにより形成されている。また、ねじ部３５の上端（基端）には、該ねじ部３５が流体配管１２の貫通孔１５内に螺入された場合に、ねじ部３５の外周面と貫通孔１５の内周面との間を介して流体が流体配管１２外に流出することを規制するためのリング状の流出規制部材３６（例えばガスケット）が設けられている。 On the lower end surface (front end surface) of the first end portion 33, a screw portion 35 that can be screwed in the communication hole 13 of the fluid pipe 12 is integrally formed concentrically. The threaded portion 35 is formed by subjecting an outer peripheral surface of a projection having a cylindrical shape to male threading. Further, when the threaded portion 35 is screwed into the through-hole 15 of the fluid pipe 12 at the upper end (base end) of the threaded portion 35, the outer peripheral surface of the threaded portion 35 and the inner peripheral surface of the through-hole 15 A ring-shaped outflow restricting member 36 (for example, a gasket) is provided for restricting the fluid from flowing out of the fluid pipe 12 through the gap.

回転部材３２のうち上記第２径部２２に対応する部分であって且つ上記ケース内流路２０よりも下側となる部分の外周面には、軸線Ｓを中心とした円環状をなす第１装着溝３７が形成されている。この第１装着溝３７内には、回転部材３２の外周面と貫通孔１５の内周面との間の隙間を埋めるため、円環状をなす第１シール部材３８（例えばＯリング）が装着されている。また、回転部材３２のうち上記第３径部２３に対応する部分の外周面には、軸線Ｓを中心とした円環状をなす第２装着溝３９が形成されており、該第２装着溝３９内には、回転部材３２の外周面と貫通孔１５の内周面との間の隙間を埋めるために、第１シール部材３８よりも外径の小さい円環状の第２シール部材４０（例えばＯリング）が装着されている。 A portion of the rotating member 32 that corresponds to the second diameter portion 22 and that is located below the in-case flow path 20 has an annular shape with an axis S as the center. A mounting groove 37 is formed. In the first mounting groove 37, an annular first seal member 38 (for example, an O-ring) is mounted to fill a gap between the outer peripheral surface of the rotating member 32 and the inner peripheral surface of the through hole 15. ing. A second mounting groove 39 having an annular shape around the axis S is formed on the outer peripheral surface of the portion of the rotating member 32 corresponding to the third diameter portion 23, and the second mounting groove 39 is formed. An annular second seal member 40 having an outer diameter smaller than that of the first seal member 38 (for example, O) is used to fill the gap between the outer peripheral surface of the rotating member 32 and the inner peripheral surface of the through hole 15. Ring) is attached.

回転部材３２のうち第５径部２５に位置対応する第２端部４１には、第５径部２５の通路断面の直径よりも僅かに小さく且つ第４径部２４の通路断面の直径よりも大きい外径を有するフランジ部４２が形成されている。そのため、貫通孔１５内においてフランジ部４２による第５径部２５内から第４径部２４内への移動が規制される結果、回転部材３２は、本体ケース１８に対して下方に移動することが規制される。 Of the rotating member 32, the second end 41 corresponding to the position of the fifth diameter portion 25 is slightly smaller than the diameter of the passage section of the fifth diameter section 25 and smaller than the diameter of the passage section of the fourth diameter section 24. A flange portion 42 having a large outer diameter is formed. Therefore, as a result of the movement of the flange portion 42 from the fifth diameter portion 25 to the fourth diameter portion 24 being restricted in the through hole 15, the rotating member 32 can move downward with respect to the main body case 18. Be regulated.

回転部材３２における第２端部４１の上面には、断面多角形状（本実施形態では、正六角形状）をなす係合部としての係合凹部４３が形成されている。すなわち、本実施形態では、係合凹部４３は、貫通孔１５における上側（即ち、第５径部２５）の開口端部よりも該本体ケース１８の内側となる位置に配置されている。そして、係合凹部４３内に工具４５（本実施形態では、六角レンチ）の作用部を上方向から軸線方向に沿って係合させた場合は、該工具４５を利用して軸線Ｓを中心に回転部材３２を正逆両方向に回転させることが可能になる。なお、回転部材３２が正方向に回転した場合には、ねじ部３５が流体配管１２の連通孔１３内に螺入することにより流体配管１２に圧力検出器１１が取着される。一方、回転部材３２が逆方向に回転した場合には、ねじ部３５が連通孔１３内で逆方向に回転するため、ねじ部３５と流体配管１２の連通孔１３との螺合関係が解消される。 On the upper surface of the second end portion 41 of the rotating member 32, an engaging recess 43 is formed as an engaging portion having a polygonal cross section (in the present embodiment, a regular hexagonal shape). In other words, in the present embodiment, the engagement recess 43 is disposed at a position that is inside the main body case 18 with respect to the opening end on the upper side (that is, the fifth diameter portion 25) in the through hole 15. When the working portion of the tool 45 (in this embodiment, a hexagon wrench) is engaged in the engaging recess 43 along the axial direction from above, the tool 45 is used to center the axis S. The rotating member 32 can be rotated in both forward and reverse directions. When the rotating member 32 rotates in the forward direction, the pressure detector 11 is attached to the fluid pipe 12 by screwing the thread portion 35 into the communication hole 13 of the fluid pipe 12. On the other hand, when the rotating member 32 rotates in the reverse direction, the screw portion 35 rotates in the reverse direction in the communication hole 13, so that the screwing relationship between the screw portion 35 and the communication hole 13 of the fluid pipe 12 is eliminated. The

回転部材３２内には、軸線Ｓ上においてねじ部３５の下端（先端）から上下方向における第１装着溝３７と第２装着溝３９との中間部分まで延びる第１誘導流路としての第１流路４６と、該第１流路４６の上端から軸線Ｓを中心とした径方向外側に向けて延びる第２流路４７とが形成されている。また、回転部材３２の外周面のうち各装着溝３７．３９の中間部分には、軸線Ｓを中心とした環状をなす第３流路４８が形成されており、該第３流路４８は、第２流路４７と連通すると共に、上記ケース内流路２０と連通している。したがって、本実施形態では、第１流路４６、第２流路４７、第３流路４８及びケース内流路２０により、回転部材３２内を介して流体配管１２内の流体を本体ケース１８内の圧力検出センサ２８側に誘導するための流体流路が構成される。また、第２流路４７、第３流路４８及びケース内流路２０により、第１流路４６内の流体を圧力検出センサ２８側に誘導するための誘導流路が構成される。 In the rotating member 32, a first flow as a first guide channel extending on the axis S from the lower end (tip) of the screw portion 35 to an intermediate portion between the first mounting groove 37 and the second mounting groove 39 in the vertical direction. A path 46 and a second flow path 47 extending from the upper end of the first flow path 46 toward the radially outer side centering on the axis S are formed. In addition, a third flow path 48 having an annular shape around the axis S is formed in an intermediate portion of each mounting groove 37.39 on the outer peripheral surface of the rotating member 32. While communicating with the second flow path 47, it communicates with the in-case flow path 20. Therefore, in the present embodiment, the fluid in the fluid pipe 12 is transferred into the main body case 18 through the rotating member 32 by the first flow path 46, the second flow path 47, the third flow path 48, and the in-case flow path 20. The fluid flow path for guiding to the pressure detection sensor 28 side is configured. Further, the second flow path 47, the third flow path 48, and the in-case flow path 20 constitute a guide flow path for guiding the fluid in the first flow path 46 to the pressure detection sensor 28 side.

次に、流体配管１２に取着されている複数の圧力検出器１１のうち取り外しを所望する圧力検出器（以下、「所望圧力検出器１１Ａ」という。）のみを流体配管１２から取り外す際の作用、及び、該所望圧力検出器１１Ａが取り外された部分（以下、「空き部分」という。）に新たな圧力検出器１１を取着する際の作用について図４に基づき以下説明する。なお、流体配管１２には、図４に示すように、複数の圧力検出器１１が千鳥状に配置されており、図４において左右方向に沿って配列された３つの圧力検出器１１のうち真ん中に位置する圧力検出器が所望圧力検出器１１Ａであるものとする。 Next, an action when removing only the pressure detector desired to be removed (hereinafter referred to as “desired pressure detector 11 A”) from among the plurality of pressure detectors 11 attached to the fluid pipe 12. The operation when the new pressure detector 11 is attached to the portion from which the desired pressure detector 11A has been removed (hereinafter referred to as “empty portion”) will be described with reference to FIG. As shown in FIG. 4, a plurality of pressure detectors 11 are arranged in a staggered manner in the fluid pipe 12, and the middle of the three pressure detectors 11 arranged along the left-right direction in FIG. 4. It is assumed that the pressure detector located at is the desired pressure detector 11A.

さて、図４に示すように、流体配管１２に取着されている複数の圧力検出器１１のうち、取り外しを所望する所望圧力検出器１１Ａには、その回転部材３２の第２端部４１に形成された係合凹部４３内に対して上方から工具４５の作用部が係合される。この際、工具４５は、所望圧力検出器１１Ａの上側に位置しており、該所望圧力検出器１１Ａに隣接する他の圧力検出器１１と接触することはない。 As shown in FIG. 4, among the plurality of pressure detectors 11 attached to the fluid pipe 12, the desired pressure detector 11 A desired to be removed is connected to the second end 41 of the rotating member 32. The action portion of the tool 45 is engaged with the inside of the formed engagement recess 43 from above. At this time, the tool 45 is located on the upper side of the desired pressure detector 11A and does not come into contact with another pressure detector 11 adjacent to the desired pressure detector 11A.

この状態で工具４５を利用して回転部材３２を逆方向に回転させると、流体配管１２の連通孔１３内では、回転部材３２のねじ部３５も逆方向に回転する。そのため、所望圧力検出器１１Ａが流体配管１２から上方に移動し、最終的には、回転部材３２のねじ部３５と流体配管１２の連通孔１３との螺合関係が解消される。すなわち、所望圧力検出器１１Ａは、隣接する他の圧力検出器１１を流体配管１２から取り外すことなく、該流体配管１２から取り外される。 When the rotary member 32 is rotated in the reverse direction using the tool 45 in this state, the screw portion 35 of the rotary member 32 is also rotated in the reverse direction in the communication hole 13 of the fluid pipe 12. Therefore, the desired pressure detector 11 A moves upward from the fluid piping 12, and finally the screwing relationship between the screw portion 35 of the rotating member 32 and the communication hole 13 of the fluid piping 12 is canceled. That is, the desired pressure detector 11 A is removed from the fluid pipe 12 without removing the other adjacent pressure detector 11 from the fluid pipe 12.

そして、この流体配管１２のうち各圧力検出器１１が取着されるスペースにおいて所望圧力検出器１１Ａが取り外された空き部分に新たな圧力検出器１１を設置する場合は、まず空き部分に新たな圧力検出器１１を配置する。この際、圧力検出器１１は、その回転部材３２のねじ部３５と流体配管１２の連通孔１３との位置合わせを行った状態で空き部分に配置される。この状態で回転部材３２の係合凹部４３内には、回転部材３２の上方から工具４５の作用部を係合させる。そして、この工具４５を利用して回転部材３２を正方向に回転させると、回転部材３２のねじ部３５は、螺合運動して連通孔１３内に螺入される。その結果、新たな圧力検出器１１は、流体配管１２に取着される。この際においても、工具４５が他の圧力検出器１１に接触することはない。 And when installing the new pressure detector 11 in the empty part where 11 A of desired pressure detectors were removed in the space where each pressure detector 11 is attached among this fluid piping 12, it is new to a new empty part first. A pressure detector 11 is arranged. At this time, the pressure detector 11 is disposed in the empty portion in a state where the screw portion 35 of the rotating member 32 and the communication hole 13 of the fluid pipe 12 are aligned. In this state, the working portion of the tool 45 is engaged with the engaging recess 43 of the rotating member 32 from above the rotating member 32. When the rotary member 32 is rotated in the forward direction using the tool 45, the screw portion 35 of the rotary member 32 is screwed into the communication hole 13. As a result, the new pressure detector 11 is attached to the fluid pipe 12. Even at this time, the tool 45 does not contact the other pressure detectors 11.

したがって、本実施形態では、以下に示す効果を得ることができる。
（１）圧力検出器１１を流体配管１２から取り外す場合には、回転部材３２の第２端部４１に設けられた係合凹部４３に対して工具４５の作用部を上方から軸線方向に沿って係合させ、工具４５を利用して回転部材３２を逆方向に回転させる。すると、回転部材３２の第１端部３３側に設けられたねじ部３５と流体配管１２の連通孔１３との螺合状態が解消され、圧力検出器１１が流体配管１２から取り外される。この際、流体配管１２上において複数の圧力検出器１１が互いに接近した状態で取着されていたとしても、所望圧力検出器１１Ａを流体配管１２から取り外す際に、所望圧力検出器１１Ａに隣接する他の圧力検出器１１と工具４５とが接触することはない。そのため、所望圧力検出器１１Ａを流体配管１２から取り外すために、他の圧力検出器１１を流体配管１２からわざわざ取り外す必要がない。したがって、流体配管１２に取着する際の配置自由度を向上させることができる。 Therefore, in this embodiment, the following effects can be obtained.
(1) When removing the pressure detector 11 from the fluid pipe 12, the working portion of the tool 45 is moved along the axial direction from above with respect to the engaging recess 43 provided in the second end portion 41 of the rotating member 32. The rotating member 32 is rotated in the reverse direction using the tool 45. Then, the screwed state between the threaded portion 35 provided on the first end 33 side of the rotating member 32 and the communication hole 13 of the fluid pipe 12 is eliminated, and the pressure detector 11 is removed from the fluid pipe 12. At this time, even if the plurality of pressure detectors 11 are attached in close proximity to each other on the fluid piping 12, when the desired pressure detector 11A is removed from the fluid piping 12, it is adjacent to the desired pressure detector 11A. The other pressure detectors 11 and the tool 45 do not come into contact with each other. Therefore, in order to remove the desired pressure detector 11 A from the fluid pipe 12, it is not necessary to remove another pressure detector 11 from the fluid pipe 12. Accordingly, it is possible to improve the degree of freedom in arrangement when attaching to the fluid pipe 12.

（２）さらに、回転部材３２が本体ケース１８に対して回転可能であるため、流体配管１２に圧力検出器１１を取着した状態で圧力検出センサ２８の位置を、回転部材３２に対して本体ケース１８を軸線Ｓを中心に回転させることにより変更することができる。 (2) Further, since the rotating member 32 is rotatable with respect to the main body case 18, the position of the pressure detection sensor 28 with respect to the rotating member 32 is set with the pressure detector 11 attached to the fluid pipe 12. The case 18 can be changed by rotating it around the axis S.

（３）圧力検出器１１を流体配管１２に取着した状態で、回転部材３２が本体ケース１８に対して上下方向に相対移動可能である場合と異なり、回転部材３２と本体ケース１８内の圧力検出センサ２８との上下方向における位置関係が変わってしまうことが規制される。そのため、回転部材３２に形成された各流路４６，４７，４８と圧力検出センサ２８との上下方向における位置関係の変化に起因した流体圧の検出精度の低下を抑制できる。 (3) Unlike the case where the rotating member 32 is movable relative to the main body case 18 in the vertical direction with the pressure detector 11 attached to the fluid pipe 12, the pressure in the rotating member 32 and the main body case 18 It is restricted that the positional relationship in the vertical direction with the detection sensor 28 changes. Therefore, it is possible to suppress a decrease in fluid pressure detection accuracy due to a change in the positional relationship between the flow paths 46, 47, 48 formed in the rotating member 32 and the pressure detection sensor 28 in the vertical direction.

（４）本体ケース１８よりも剛性の高い材料で形成された回転部材３２の第１端部３３は、本体ケース１８の下面３４よりも下方に位置している。そのため、圧力検出器１１を流体配管１２に取着した際に、回転部材３２の第１端部３３と流体配管１２との間に本体ケース１８の一部が介在することはない。その結果、回転部材３２の第１端部３３と流体配管１２との間に本体ケース１８の一部が介在する構成の場合とは異なり、圧力検出器１１を流体配管１２に取着する際に回転部材３２を過剰に正方向に回転させてしまったとしても、本体ケース１８が変形したり破損したりすることを抑制できる。また、本体ケース１８の変形や破損を抑制するための部材を別途設けることを回避できる結果、部品点数の増加を抑制できる。 (4) The first end 33 of the rotating member 32 formed of a material having higher rigidity than the main body case 18 is positioned below the lower surface 34 of the main body case 18. Therefore, when the pressure detector 11 is attached to the fluid pipe 12, a part of the main body case 18 is not interposed between the first end 33 of the rotating member 32 and the fluid pipe 12. As a result, unlike the case where a part of the main body case 18 is interposed between the first end portion 33 of the rotating member 32 and the fluid pipe 12, the pressure detector 11 is attached to the fluid pipe 12. Even if the rotating member 32 is excessively rotated in the positive direction, the main body case 18 can be prevented from being deformed or damaged. Moreover, as a result of avoiding separately providing a member for suppressing deformation and breakage of the main body case 18, an increase in the number of parts can be suppressed.

（５）回転自在な回転部材３２に形成された第３流路４８は、軸線Ｓを中心に円環状をなすように形成されている。そのため、第２流路４７の回転位置とケース内流路２０の回転位置とが異なっている場合であっても、流体配管１２内の流体を圧力検出センサ２８に確実に誘導できる。 (5) The third flow path 48 formed in the rotatable rotating member 32 is formed to have an annular shape around the axis S. Therefore, even if the rotational position of the second flow path 47 and the rotational position of the in-case flow path 20 are different, the fluid in the fluid pipe 12 can be reliably guided to the pressure detection sensor 28.

（６）該第３流路４８の上下方向に個別に配置された各シール部材３８，４０によって、第３流路４８内の流体が回転部材３２の外周面と貫通孔１５の内周面との間を介して外部に流出することを規制できる。また、回転部材３２の外周面と貫通孔１５の内周面との間を介して第３流路４８内に外部から塵や埃などの異物が流入することも規制できる。 (6) By the seal members 38 and 40 individually arranged in the vertical direction of the third flow path 48, the fluid in the third flow path 48 is exchanged between the outer peripheral surface of the rotating member 32 and the inner peripheral surface of the through hole 15. It is possible to regulate outflow to the outside through the gap. In addition, foreign matters such as dust and dirt can be restricted from flowing into the third flow path 48 from between the outer peripheral surface of the rotating member 32 and the inner peripheral surface of the through hole 15.

（７）本体ケース１８の貫通孔１５内に回転部材３２を装着させる際、貫通孔１５内には、本体ケース１８の下面３４側から回転部材３２が挿入される。もし仮に第２シール部材４０の外径の大きさが第１シール部材３８の外径の大きさ以上であったとすると、第２シール部材４０と貫通孔１５の内周面との間の摺動抵抗が大きくなり過ぎて、第２シール部材４０が破損してしまうおそれがある。この点、本実施形態では、第２シール部材４０の外径の大きさが第１シール部材３８の外径の大きさ未満であるため、本体ケース１８の貫通孔１５内に回転部材３２を挿入する際に、第２シール部材４０が破損することを回避できる。 (7) When the rotating member 32 is mounted in the through hole 15 of the main body case 18, the rotating member 32 is inserted into the through hole 15 from the lower surface 34 side of the main body case 18. If the outer diameter of the second seal member 40 is greater than or equal to the outer diameter of the first seal member 38, sliding between the second seal member 40 and the inner peripheral surface of the through hole 15 is performed. There is a possibility that the resistance becomes too large and the second seal member 40 is damaged. In this regard, in this embodiment, since the outer diameter of the second seal member 40 is smaller than the outer diameter of the first seal member 38, the rotating member 32 is inserted into the through hole 15 of the main body case 18. When doing, it can avoid that the 2nd seal member 40 is damaged.

（８）本実施形態では、回転部材３２の第２端部４１及び係合凹部４３は、本体ケース１８内に配置されている。そのため、作業者が不用意に回転部材３２に接触することを回避できる。 (8) In the present embodiment, the second end portion 41 and the engagement recess 43 of the rotating member 32 are disposed in the main body case 18. Therefore, it is possible to avoid the operator from inadvertently contacting the rotating member 32.

（９）回転部材３２、圧力検出素子２９及び回路基板３０は、本体ケース１８内において一直線上にそれぞれ配置されている。そのため、回転部材３２、圧力検出素子２９及び回路基板３０が一直線上に配置されない構成の場合に比して、圧力検出器１１全体のコンパクト化を図ることができる。 (9) The rotating member 32, the pressure detecting element 29, and the circuit board 30 are arranged in a straight line in the main body case 18, respectively. For this reason, the pressure detector 11 as a whole can be made more compact than in the case where the rotating member 32, the pressure detecting element 29, and the circuit board 30 are not arranged in a straight line.

（１０）本体ケース１８の左端側部位を平面視矩形状に形成した場合に比して、流体配管１２上において複数の圧力検出器１１をより接近させた状態で配置できる。すなわち、流体配管１２上の限られたスペース内により多くの圧力検出器１１を配置できる。 (10) Compared to the case where the left end portion of the main body case 18 is formed in a rectangular shape in plan view, the plurality of pressure detectors 11 can be arranged closer to each other on the fluid piping 12. That is, more pressure detectors 11 can be arranged in a limited space on the fluid pipe 12.

（１１）また、本体ケース１８の前側面及び後側面は、それぞれ平面状をなしている。そのため、本体ケース１８の前側面及び後側面が凹凸を有する側面である場合に比して、前後方向において互いに隣り合う圧力検出器１１同士をより接近させた状態で配置できる。 (11) Further, the front side surface and the rear side surface of the main body case 18 are each flat. Therefore, compared with the case where the front side surface and the rear side surface of the main body case 18 are uneven side surfaces, the pressure detectors 11 adjacent to each other in the front-rear direction can be arranged closer to each other.

（第２の実施形態）
次に、本発明の第２の実施形態を図５〜図７に従って説明する。なお、第２の実施形態は、回転部材の構成が第１の実施形態と異なっている。したがって、以下の説明においては、第１の実施形態と相違する部分について主に説明するものとし、第１の実施形態と同一又は相当する部材構成には同一符号を付して重複説明を省略するものとする。 (Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. The second embodiment differs from the first embodiment in the configuration of the rotating member. Therefore, in the following description, parts different from those of the first embodiment will be mainly described, and the same or corresponding member configurations as those of the first embodiment are denoted by the same reference numerals, and redundant description will be omitted. Shall.

図５及び図６に示すように、本実施形態の回転部材５０の下端側となる第１端部５１は、本体ケース１８に形成された貫通孔１５の第１径部２１内に収容されており、該第１端部５１の下面と本体ケース１８の下面３４は、面一である。そして、第１端部５１の下面には、平面視略円形状をなす軸部５２が形成されている。 As shown in FIGS. 5 and 6, the first end 51 which is the lower end side of the rotating member 50 of the present embodiment is accommodated in the first diameter portion 21 of the through hole 15 formed in the main body case 18. The lower surface of the first end 51 and the lower surface 34 of the main body case 18 are flush with each other. A shaft portion 52 having a substantially circular shape in plan view is formed on the lower surface of the first end portion 51.

この軸部５２は、その基端部（上端部）５３が円柱形状をなすと共に、その先端部（下端部）５４が下方に向かうに連れて次第に小径となるテーパ状をなすように形成されている。そして、軸部５２の先端部５４の外周面には、雄ねじ加工が施されており、軸部５２の先端部５４は、流体配管１２の連通孔１３内に螺入可能とされている。したがって、本実施形態では、軸部５２の先端部５４が、ねじ部として機能するようになっている。 The shaft portion 52 is formed such that the base end portion (upper end portion) 53 has a cylindrical shape and the tip end portion (lower end portion) 54 has a tapered shape that gradually becomes smaller in diameter as it goes downward. Yes. The outer peripheral surface of the distal end portion 54 of the shaft portion 52 is subjected to male screw processing, and the distal end portion 54 of the shaft portion 52 can be screwed into the communication hole 13 of the fluid pipe 12. Therefore, in this embodiment, the front-end | tip part 54 of the axial part 52 functions as a screw part.

また、軸部５２の先端部５４の外周面側には、圧力検出器１１を流体配管１２に取着する際に該先端部５４の外周面と流体配管１２の連通孔１３の内周面との間の隙間を埋めるための流出規制部材５５（例えば、弾性を有するシート部材や粘性を有する液体）が設けられている。 Further, on the outer peripheral surface side of the tip portion 54 of the shaft portion 52, when the pressure detector 11 is attached to the fluid pipe 12, the outer peripheral surface of the tip portion 54 and the inner peripheral surface of the communication hole 13 of the fluid pipe 12 are provided. An outflow restricting member 55 (for example, a sheet member having elasticity or a liquid having viscosity) is provided to fill a gap between the two.

回転部材５０の上端側となる第２端部５６は、その上端側が本体ケース１８の上面４４よりも上方に位置するように形成されており、第２端部５６の上面には、断面多角形状（本実施形態では、正六角形状）をなす係合凹部５７が形成されている。また、第２端部５６には、その外周面のうち係合凹部５７を挟んで対峙する各部位を平面状に削ることにより被挟持部５８が形成されている。すなわち、本実施形態では、係合凹部５７及び被挟持部５８により、工具４５（六角レンチやスパナなど）が本体ケース１８の上面４４側から軸線方向に沿って係合可能な係合部が構成されている。 The second end portion 56 that is the upper end side of the rotating member 50 is formed such that the upper end side is located above the upper surface 44 of the main body case 18, and the upper surface of the second end portion 56 has a polygonal cross section. An engagement recess 57 having a regular hexagonal shape (in the present embodiment) is formed. In addition, the second end portion 56 is formed with a sandwiched portion 58 by cutting each portion of the outer peripheral surface facing each other across the engagement recess 57 into a flat shape. That is, in the present embodiment, the engaging recess 57 and the sandwiched portion 58 constitute an engaging portion in which the tool 45 (hexagon wrench, spanner, etc.) can be engaged along the axial direction from the upper surface 44 side of the main body case 18. Has been.

したがって、本実施形態では、上記第１の実施形態の効果（１）〜（７）、（９）〜（１１）に加えて以下に示す効果を得ることができる。
（１２）本実施形態では、工具４５と係合する係合部（係合凹部５７及び被挟持部５８）が本体ケース１８の上面よりも外側（上方）に配置されている。そのため、回転部材５０を回転させるための工具４５としては、係合凹部５７に係合可能な六角レンチ以外にも被挟持部５８を挟持可能な挟持工具（スパナなど）を利用することができる。 Therefore, in this embodiment, in addition to the effects (1) to (7) and (9) to (11) of the first embodiment, the following effects can be obtained.
(12) In the present embodiment, the engaging portions (the engaging recess 57 and the sandwiched portion 58) that engage with the tool 45 are disposed on the outer side (above) of the upper surface of the main body case 18. Therefore, as the tool 45 for rotating the rotating member 50, a clamping tool (such as a spanner) that can clamp the clamped portion 58 can be used in addition to the hexagon wrench that can be engaged with the engaging recess 57.

なお、上記各実施形態は以下のような別の実施形態に変更してもよい。
・各実施形態において、導入側ハウジング１６の左側部位を、その外周縁が圧力検出センサ２８から離間するほど幅狭になる形状に形成してもよい。例えば、導入側ハウジング１６の左側部位を、平面視略三角形状をなすように形成してもよい。このように構成しても、上記各実施形態と同様の作用効果を得ることができる。 In addition, you may change each said embodiment into another embodiment as follows.
In each embodiment, the left side portion of the introduction-side housing 16 may be formed in a shape that becomes narrower as the outer peripheral edge is separated from the pressure detection sensor 28. For example, the left side portion of the introduction-side housing 16 may be formed to have a substantially triangular shape in plan view. Even if comprised in this way, the effect similar to said each embodiment can be acquired.

また、導入側ハウジング１６は、上面視略矩形状をなすように形成してもよい。
・各実施形態において、電気ケーブル１４と回路基板３０の接続部位を、回路基板３０の左面側に設けてもよい。 Further, the introduction-side housing 16 may be formed to have a substantially rectangular shape when viewed from above.
In each embodiment, the connection portion between the electric cable 14 and the circuit board 30 may be provided on the left side of the circuit board 30.

また、回路基板３０を、本体ケース１８内において圧力検出素子２９の前側や後側に配置してもよい。
・各実施形態において、圧力検出センサ２８は、回路基板３０を備えない構成であってもよい。この場合、電気ケーブル１４は、圧力検出素子２９に電気的に直接接続される。 Further, the circuit board 30 may be disposed in the main body case 18 on the front side or the rear side of the pressure detection element 29.
In each embodiment, the pressure detection sensor 28 may be configured without the circuit board 30. In this case, the electric cable 14 is electrically connected directly to the pressure detection element 29.

・各実施形態において、貫通孔１５において第２径部２２及び第３径部２３の通路断面の直径が同一である場合、第２シール部材４０は、その外径が第１シール部材３８の外径と同一となるようなシール部材であってもよい。このように構成しても、回転部材３２を貫通孔１５内に装着させる際に、第２シール部材４０が破損してしまうことを抑制できる。 -In each embodiment, when the diameter of the passage cross section of the 2nd diameter part 22 and the 3rd diameter part 23 is the same in the through-hole 15, the 2nd seal member 40 has the outer diameter outside the 1st seal member 38. A sealing member having the same diameter may be used. Even if comprised in this way, when mounting the rotation member 32 in the through-hole 15, it can suppress that the 2nd seal member 40 is damaged.

・各実施形態において、貫通孔１５において第２径部２２の通路断面の直径の方が第３径部２３の通路断面の直径よりも小径である場合、第２シール部材４０は、その外径が第１シール部材３８の外径よりも大きいシール部材であってもよい。 -In each embodiment, when the diameter of the passage cross section of the 2nd diameter part 22 is smaller than the diameter of the passage cross section of the 3rd diameter part 23 in the through-hole 15, the 2nd seal member 40 is the outer diameter. May be larger than the outer diameter of the first seal member 38.

・各実施形態において、第１シール部材３８及び第２シール部材４０として、回転部材３２，５０の外周面と貫通孔１５の内周面との隙間を埋めるための液状体（ジェルなど）を用いてもよい。 In each embodiment, as the first seal member 38 and the second seal member 40, a liquid material (gel or the like) for filling the gap between the outer peripheral surface of the rotating members 32 and 50 and the inner peripheral surface of the through hole 15 is used. May be.

・各実施形態において、第３流路は、貫通孔１５の内周面において軸線Ｓを中心とした環状をなすように形成された環状溝であってもよい。このように流体流路を構成した場合、第１流路４６及び第２流路４７を流動してきた流体は、貫通孔１５の内周面に形成された環状溝内を流動してケース内流路２０内に流入することになる。 In each embodiment, the third flow path may be an annular groove formed on the inner peripheral surface of the through-hole 15 so as to form an annular shape around the axis S. When the fluid flow path is configured as described above, the fluid that has flowed through the first flow path 46 and the second flow path 47 flows in the annular groove formed in the inner peripheral surface of the through hole 15 and flows in the case. It will flow into the path 20.

また、第３流路は、図８に示すように、回転部材３２の外周面と貫通孔１５の内周面との間に介在する隙間にて形成された環状流路６０であってもよい。
・各実施形態において、誘導流路は、第１流路４６の上端部から放射方向に延びるＮ本（Ｎは、２以上の正数）の第２流路４７と、貫通孔１５の内周面に形成され、ケース内流路２０に連通する円弧状の円弧流路とを備えた構成であってもよい。この場合、円弧流路を、その中心角が「３６０°／Ｎ」以上の角度となるように形成することが望ましい。このように構成しても、回転部材３２の回転角度に関係なく、圧力検出センサ２８側に流体を確実に供給できる。 Further, as shown in FIG. 8, the third flow path may be an annular flow path 60 formed by a gap interposed between the outer peripheral surface of the rotating member 32 and the inner peripheral surface of the through hole 15. .
In each embodiment, the guide channel includes N (N is a positive number of 2 or more) second channels 47 extending radially from the upper end of the first channel 46 and the inner periphery of the through hole 15. The structure provided with the circular arc-shaped flow path formed in the surface and communicating with the flow path 20 in a case may be sufficient. In this case, it is desirable to form the circular arc channel so that the central angle is an angle of “360 ° / N” or more. Even if comprised in this way, a fluid can be reliably supplied to the pressure detection sensor 28 side irrespective of the rotation angle of the rotation member 32.

・各実施形態において、回転部材３２が本体ケース１８に対して相対的に上下方向に移動可能な構成であってもよい。
・各実施形態において、本体ケース１８の前側面は、平面状ではなく、凸部や凹部が形成された構成であってもよい。同様に、本体ケース１８の後側面もまた、平面状ではなく、凸部や凹部が形成された構成であってもよい。 In each embodiment, the rotation member 32 may be configured to be movable in the vertical direction relative to the main body case 18.
-In each embodiment, the front side surface of the main body case 18 may not be planar, but may have a configuration in which convex portions or concave portions are formed. Similarly, the rear side surface of the main body case 18 may also have a configuration in which convex portions and concave portions are formed instead of a flat shape.

・第１の実施形態において、図９に示すように、流体配管１２にボス部６５が形成され、該ボス部６５の外周面側に雄ねじ加工が施されている場合、ねじ部３５は、その内周面側に雌ねじ加工が施された構成であってもよい。 -In 1st Embodiment, as shown in FIG. 9, when the boss | hub part 65 is formed in the fluid piping 12, and the external thread side is given to the outer peripheral surface side of this boss | hub part 65, the screw | thread part 35 is the The structure by which the internal thread processing was given to the inner peripheral surface side may be sufficient.

・圧力検出器１１を流体が貯留された流体タンク（被取付部材）に取着した場合の実施形態に具体化してもよい。
・また、被取付部材内の流体は、気体ではなく、任意の液体（例えば水）であってもよい。 -You may materialize to embodiment at the time of attaching the pressure detector 11 to the fluid tank (attachment member) in which the fluid was stored.
-Moreover, the fluid in a to-be-attached member may be arbitrary liquids (for example, water) instead of gas.

第１の実施形態における圧力検出器の斜視図。The perspective view of the pressure detector in 1st Embodiment. 第１の実施形態における圧力検出器の側断面図。The side sectional view of the pressure detector in a 1st embodiment. 第１の実施形態における圧力検出器の平断面図。FIG. 3 is a cross-sectional plan view of the pressure detector according to the first embodiment. 圧力検出器を千鳥状に配置した場合の平面図。The top view at the time of arrange | positioning a pressure detector in zigzag form. 第２の実施形態における圧力検出器の一部断面図。The partial sectional view of the pressure detector in a 2nd embodiment. 第２の実施形態における圧力検出器の側断面図。The side sectional view of the pressure detector in a 2nd embodiment. 第２の実施形態における圧力検出器の平面図。The top view of the pressure detector in 2nd Embodiment. 変形例の環状流路を示す概略断面図。The schematic sectional drawing which shows the annular flow path of a modification. 変形例の圧力検出器を示す一部断面図。The partial cross section figure which shows the pressure detector of a modification.

Explanation of symbols

１１，１１Ａ…圧力検出器、１２…被取付部材としての流体配管、１４…電気ケーブル、１５…貫通孔、１８…本体ケース、２０…流体流路、第２誘導流路としてのケース内流路、２８…流体圧検出器としての圧力検出センサ、２９…圧力検出素子、３２，５０…回転部材、３４…一面としての下面、３５…ねじ部、３８…第１シール部材、４０…第２シール部材、４１，５６…第２端部、４３，５７…係合部としての係合凹部、４４…反対面としての上面、４５…工具、４６…流体流路、第１誘導流路としての第１流路、４７…流体流路、第２誘導流路としての第２流路、４８…流体流路、第２誘導流路としての第３流路、５４…ねじ部としての先端部、５８…係合部としての被挟持部、６０…流体流路、第２誘導流路としての環状流路、Ｓ…軸線。 DESCRIPTION OF SYMBOLS 11, 11A ... Pressure detector, 12 ... Fluid piping as to-be-attached member, 14 ... Electric cable, 15 ... Through-hole, 18 ... Main body case, 20 ... Fluid flow path, In-case flow path as 2nd induction flow path 28 ... Pressure detection sensor as fluid pressure detector, 29 ... Pressure detection element, 32, 50 ... Rotating member, 34 ... Lower surface as one surface, 35 ... Screw part, 38 ... First seal member, 40 ... Second seal Member, 41, 56 ... second end, 43, 57 ... engaging recess as an engaging part, 44 ... upper surface as opposite surface, 45 ... tool, 46 ... fluid channel, first as first guiding channel 1 flow path, 47... Fluid flow path, second flow path as second induction flow path, 48... Fluid flow path, third flow path as second induction flow path, 54. ... a sandwiched part as an engaging part, 60 ... a fluid channel, an annular channel as a second guide channel, ... axis.

Claims

A pressure detector that is attached in a manner capable of detecting the pressure of the fluid in the attached member with respect to the attached member formed to allow fluid to flow or store,
A through hole having a circular cross section is formed so as to extend along a predetermined axial direction, and the pressure of the fluid can be detected at a position not intersecting the through hole and on the side of the through hole. A body case in which the fluid pressure detection unit is accommodated;
A rotating member inserted in the through hole of the main body case so as to be rotatable about the axis; and
A fluid flow path for guiding the fluid toward the fluid pressure detection unit in the main body case through the rotating member;
The fluid pressure detection unit is provided with a pressure detection element that outputs an electrical signal corresponding to the pressure of the fluid in the fluid flow path, and an electrical cable for outputting the electrical signal to the outside includes the rotating member and Extending in a direction along a straight line connecting the pressure detecting element,
In the main body case, both side surfaces that are arranged to sandwich the through hole and the fluid pressure detection unit from a direction intersecting the axial direction are formed in a planar shape,
The rotating member has a first end located on one surface side of the main body case in the axial direction and a second end located on the opposite surface side of the main body case in the axial direction. The front end surface of the first end portion is disposed at a position flush with the one surface of the main body case or at a position outside the main body case from the one surface, and the first end portion includes the A threaded portion capable of screwing along the axial direction is formed as the rotating member rotates, and a tool for rotating the rotating member is provided on the one surface of the main body case at the second end. An engaging portion is provided that can be engaged along the axial direction from the side opposite to the side;
The fluid flow path includes a first induction flow path formed from the first end side to a midway portion in the axial direction of the rotating member, and fluid in the first induction flow path on the fluid pressure detection unit side A second guiding channel for guiding to
In the through hole, an outer peripheral surface of the rotating member and an inner peripheral surface of the through hole are positioned on the first end side and the second end side of the second guide channel. A pressure detector provided with a first seal member and a second seal member, respectively, for restricting the fluid in the second guide channel from flowing out of the main body case.

The rotating member is adapted to be inserted from the direction along the axial direction into the through hole,
The through hole is formed such that a passage sectional area on the rear side in the insertion direction of the rotating member is wider than a passage sectional area on the front side in the insertion direction of the rotating member, and the first seal member and the second sealing member The sealing members are each formed to form an annular shape,
Of the first seal member and the second seal member, the seal member disposed on the front side in the insertion direction is formed so that the outer diameter thereof is smaller than the outer diameter of the seal member disposed on the rear side in the insertion direction. The pressure detector according to claim 1.

The said engaging part is arrange | positioned in the position which becomes the inner side of the said main body case rather than the opening end surface of the said opposite surface side of the said main body case in the said through-hole. The pressure detector described.

The main body case has an arcuate shape in which the outer peripheral edge on the opposite side of the fluid pressure detecting portion in the portion where the through hole is formed in the plan view as viewed from the axial direction, or the fluid pressure detection The pressure detector as described in any one of Claims 1-3 currently formed in the shape which becomes so narrow that it leaves | separates from a part.