JP4503278B2 - Water meter unit - Google Patents

Water meter unit Download PDF

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JP4503278B2
JP4503278B2 JP2003415719A JP2003415719A JP4503278B2 JP 4503278 B2 JP4503278 B2 JP 4503278B2 JP 2003415719 A JP2003415719 A JP 2003415719A JP 2003415719 A JP2003415719 A JP 2003415719A JP 4503278 B2 JP4503278 B2 JP 4503278B2
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water meter
meter
water
downstream
upstream
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JP2005172712A (en
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茂樹 松林
陽一 飯島
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Kitz Corp
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Description

本発明は、水道使用量を計量するための水道用メータと、この水道用メータ前後に配置される止水栓や接続器具類などをユニットとして提供可能なメータユニットに関し、例えば、集合住宅などの戸口付近に配設されたパイプシャフト内に設置するのに好適な水道用メータユニットに関する。   The present invention relates to a water meter for measuring the amount of water used, and a meter unit capable of providing, as a unit, a stop cock or a connecting device arranged before and after the water meter, such as a housing complex. The present invention relates to a water meter unit suitable for installation in a pipe shaft disposed in the vicinity of a doorway.

従来より、集合住宅などの戸口付近には、パイプシャフトといわれる収納スペースが設けられており、この収納スペース内には水道使用量を計量するための水道用メータを取付したメータユニットが設置されている。水道配管の途中に設置される水道用メータは、計量法で定めた所定期間経過後に交換する必要があることから、ネジ固定式や圧着固定式などの固定手段によって交換可能にメータユニット本体に取付されている。ところが、ネジ固定式の場合には、メータユニット本体の両側に設けたナットの内周雌ネジ部と水道用メータの両端の外周雄ネジ部とを螺合する構造であるため、その取り付け、取り外しには工具を用いて行う必要があり、しかも、ナットの回転に伴って水道用メータがナットと一緒に共回りすることから、作業時には常に水道用メータを手で押さえて作業を行う必要があった。   Conventionally, a storage space called a pipe shaft has been provided near the doorway of an apartment house, etc., and a meter unit with a water meter for measuring water usage is installed in this storage space. Yes. Since the water meter installed in the middle of the water pipe needs to be replaced after the lapse of a predetermined period stipulated by the Measurement Law, it can be replaced on the meter unit body by a fixing means such as a screw fixing type or crimp fixing type. Has been. However, in the case of the screw-fixed type, the structure is such that the inner peripheral female threaded portion of the nut provided on both sides of the meter unit main body and the outer peripheral male threaded portion at both ends of the water meter are screwed together. In addition, it is necessary to carry out the work by always holding the water meter by hand during work because the water meter rotates together with the nut as the nut rotates. It was.

そこで、現在では圧着固定式を採用する傾向が見られる。この圧着固定式は、メータユニット本体の両側に水道用メータの支持部材を設け、一方の支持部材が水道用メータの接続端面を押圧することで、両支持部材間に水道用メータを挟圧保持する構造であり、この押圧構造としては、スプリングを用いたもの、カム機構を用いたもの、並びに回転部材を用いたものがある。いずれの場合においても、支持部材に設けた受け面に水道用メータの接続端部を載置した後、一方の支持部材を水道用メータの接続端面に押圧する構造であることから、両支持部材によって挟圧保持されるまでの間、水道用メータが周方向へ傾いたり、回転等しないように、適正な状態で受け面に支受けしておく必要がある。また、水道用メータは正しい計量を行うため、上流側・下流側が定められていることから、方向を間違うことなくメータユニット本体に配置する必要がある。ここで、従来より、各種の水道用メータユニットが提案されているので以下に説明する(例えば、特許文献1又は2参照。)。   Therefore, there is now a tendency to adopt a crimping type. This crimp-fixed type is provided with water meter support members on both sides of the meter unit body, and one support member presses the connection end face of the water meter so that the water meter is sandwiched between both support members. This pressing structure includes a structure using a spring, a structure using a cam mechanism, and a structure using a rotating member. In either case, since the connection end of the water meter is placed on the receiving surface provided on the support member, the support member is pressed against the connection end surface of the water meter. It is necessary that the water meter is supported on the receiving surface in an appropriate state so that the water meter does not tilt or rotate in the circumferential direction until it is held by the pressure. Moreover, since the upstream and downstream sides of the water meter are determined in order to perform correct measurement, it is necessary to arrange the meter in the meter unit main body without making a mistake in the direction. Here, various water meter units have been proposed in the past, and will be described below (see, for example, Patent Document 1 or 2).

例えば、特開平3−137520号公報(特許文献1)に記載の装置は、水道用メータの回転を防止するために、ベース体上面に位置決め用突起を突設しており、この位置決め用突起に沿って水道用メータの着脱を行うようにしている。通常、このような突起の上面には凹状の溝部が形成されており、この溝部に水道用メータの下流側底部のリブを係止することで、水道用メータの不用意な回転を防止している。
さらに、特開2003−270024号公報(特許文献2)に記載の装置は、水道用メータの上流側底部が下流側底部よりも下方に膨出した非対称構造である点を利用し、下流側の支持部材の下方で、かつ、ベース体の上面に、水道用メータの下流側底部をブロックするブロック片を設けて、水道用メータが誤った向きで取付されるのを防止している。また、このブロック片の上面には、水道用メータの下流側底部のリブと嵌合する嵌合溝を設けて、水道用メータの不用意な回転を防止している。
特開平3−137520号公報 特開2003−270024号公報
For example, in the apparatus described in Japanese Patent Laid-Open No. 3-137520 (Patent Document 1), a positioning protrusion is provided on the upper surface of the base body in order to prevent rotation of the water meter. Along with this, the water meter is attached and detached. Usually, a concave groove is formed on the upper surface of such a protrusion, and the rib on the downstream bottom of the water meter is locked in this groove to prevent inadvertent rotation of the water meter. Yes.
Furthermore, the apparatus described in Japanese Patent Application Laid-Open No. 2003-270024 (Patent Document 2) uses the point that the upstream bottom portion of the water meter has an asymmetric structure that bulges downward from the downstream bottom portion. A block piece for blocking the downstream bottom of the water meter is provided below the support member and on the upper surface of the base body to prevent the water meter from being attached in the wrong direction. In addition, a fitting groove that fits with a rib on the bottom of the downstream side of the water meter is provided on the top surface of the block piece to prevent inadvertent rotation of the water meter.
Japanese Patent Laid-Open No. 3-137520 JP 2003-270024 A

しかしながら、特開平3−137520号公報(特許文献1)、特開2003−270024号公報(特許文献2)は、水道用メータの不用意な回転を防止する突起(位置決め用突起、ブロック片)をベース体上で、しかも、水道用メータの下方空間を大きく減少させた状態で設けているので、水道用メータとベース体との間に有効な空隙部を確保することができず、この部位に水道用メータの凍結防止用の断熱材を装入することができない等の問題も有していた。さらに、図10に示すように、水道用メータMの下流側底部のリブM3と、突起40の上面に形成された溝部41とが係合しない状態であっても、水道用メータMの流路軸心Pとメータユニット本体の流路軸心Qとが一致してしまい、水道用メータが傾いた適正でない状態にもかかわらず、水道用メータMを挟圧保持するので、正しい流量測定ができないという問題も有していた。   However, Japanese Patent Laid-Open Nos. 3-137520 (Patent Document 1) and 2003-270024 (Patent Document 2) have protrusions (positioning protrusions, block pieces) that prevent inadvertent rotation of the water meter. Since the space below the water meter is greatly reduced on the base body, an effective gap cannot be secured between the water meter and the base body. There was also a problem that a heat insulating material for preventing freezing of a water meter could not be charged. Furthermore, as shown in FIG. 10, even if the rib M3 at the bottom of the downstream side of the water meter M and the groove 41 formed on the upper surface of the protrusion 40 are not engaged, the flow path of the water meter M Since the shaft center P and the channel shaft center Q of the meter unit body coincide with each other and the water meter M is held in a pressured state, the water meter M is clamped and held, so that a correct flow rate cannot be measured. There was also a problem.

さらに、支持部材のメータ側端面において、加工時間・費用低減の観点から、側面自体は鋳肌面或いは鍛上がり表面とし、水道用メータの接続端面と密着する挟持面のみを精度よく加工するため、この挟持面をメータ側端面よりも一段低いインロー形状とするものがある。この場合には、水道用メータの接続端面と支持部材の挟持面との間隙が広がることに加え、水道用メータの下流側底部のリブは、水道用メータの下流側端部近傍から中央に向かって下向きに傾斜した形状を有することから、水道用メータの上流側の接続端面が上流側の支持部材の挟持面に当接した状態、すなわち、水道用メータが最も上流側に位置している場合には、水道用メータの回転を防止する溝部からリブが外れてしまうおそれがあり、このような場合には、挟持する前の支受け状態にある水道用メータが周方向へ傾いたり、回転してしまうという問題も有していた。   Furthermore, on the meter side end surface of the support member, from the viewpoint of processing time and cost reduction, the side surface itself is a cast surface or forged surface, and only the clamping surface that is in close contact with the connection end surface of the water meter is processed accurately. Some pinching surfaces have an inlay shape that is one step lower than the end surface on the meter side. In this case, in addition to the gap between the connection end surface of the water meter and the holding surface of the support member being widened, the rib on the downstream bottom of the water meter is directed from the vicinity of the downstream end of the water meter toward the center. The connection end surface on the upstream side of the water meter is in contact with the clamping surface of the upstream support member, that is, the water meter is located on the most upstream side. In such a case, the rib may come off from the groove that prevents the water meter from rotating, and in such a case, the water meter in a supported state before being sandwiched may be tilted or rotated in the circumferential direction. It also had the problem of end up.

この現象を防止するために、水道用メータのリブと水道用メータの回転を防止する溝部とが確実に係合するように、水道用メータのリブと溝部との位置を調整した後、上流側・下流側の両支持部材で挟圧保持するようにしてもよいが、水道用メータが配置される狭いパイプシャフトやピット内では、このような微調整を含んだ作業は、作業者にとって極めて困難であり、特に、暗い場所、狭い場所といった作業条件のわるい所では、いっそう困難を伴い作業性を低下させるものであった。   In order to prevent this phenomenon, after adjusting the position of the rib and groove of the water meter so that the rib of the water meter and the groove that prevents rotation of the water meter are securely engaged, the upstream side・ Although it is possible to hold the pressure with both support members on the downstream side, it is extremely difficult for the operator to perform such a fine adjustment in a narrow pipe shaft or pit where a water meter is installed. Especially in places with poor work conditions such as dark places and narrow places, it is more difficult and the workability is lowered.

本発明は、上記の課題点に鑑み、鋭意研究の結果開発に至ったものであり、その目的とするところは、メータユニット本体に配置される水道用メータを適正な状態を維持して確実に挟圧保持することができると共に、水道用メータが適正でない状態で配置された場合には、その状態を作業者は容易に認識することができ、確実に誤装着を防止することができる作業性、耐久性に優れた水道用メータユニットを提供することにある。   The present invention has been developed as a result of diligent research in view of the above-mentioned problems, and the object of the present invention is to ensure that the water meter arranged in the meter unit main body is maintained in an appropriate state. If the water meter can be held under pressure and the water meter is placed in an inappropriate state, the operator can easily recognize the state and workability can be reliably prevented. It is to provide a water meter unit with excellent durability.

上記の目的を達成するため、請求項1に係る発明は、ベース体の両側に保持部を立設し、この保持部に水道用メータの両端部を支持する上流側の第一支持機構と下流側の第二支持機構を取り付けた水道用メータユニットにおいて、前記下流側の第二支持機構は、筒状部材に螺着したナット部材から成り、このナット部材の外端部の下方位置に水道用メータの一端部を支受けする円弧状の受け面を突設形成し、この受け面の先端には、水道用メータの下流側底面の一部を包み込む舌片状の位置確認部を水平方向に一体に延設し、この位置確認部の先端側には、水道用メータの下流側底部のリブを係止する溝部を形成すると共に、前記受け面の両端縁部の先端側から位置確認部の両側先端に向けて下方に傾斜する傾斜状の両側縁部を形成し、前記リブが前記溝部に係合しないとき、水道用メータの一端部が前記両側縁部に乗り上げるようにした水道用メータユニットである。 In order to achieve the above object, the invention according to claim 1 is characterized in that a holding portion is erected on both sides of the base body, and an upstream first support mechanism and downstream that support both ends of the water meter on the holding portion. in water for meter unit attached to the second support mechanism side, the second supporting mechanism of the downstream side is composed of a nut member which is screwed to the tubular member, for water at a lower position of the outer end of the nut member An arc-shaped receiving surface that supports one end of the meter is formed in a protruding manner, and a tongue-shaped position confirmation portion that wraps a part of the bottom surface on the downstream side of the water meter is formed in the horizontal direction at the tip of the receiving surface. A groove portion is formed on the distal end side of the position confirmation portion to lock the rib at the bottom of the downstream side of the water meter, and the position confirmation portion is extended from the distal end side of both end edges of the receiving surface. Forming both side edges of the inclined shape that incline downward toward both ends; When the blanking does not engage in the groove, it is for water meter unit one end of the water for the meter is to ride on the side edge portions.

請求項1に係る発明によると、水道用メータのリブが位置確認部の溝部に係合しない状態で受け面に載置された場合には、水道用メータの一端部が位置確認部の傾斜状両側縁部に乗り上げてメータの流路軸心とメータユニット本体の流路軸心が不一致となるため、水道用メータの誤装着を視認することができ、誤装着を確実に防止することができる。また、継手部等の腐食部位がないので、耐食性を大幅に向上させ、配管強度にも優れたメータユニットを可能にし、さらに、ナット部材に受け面を一体に設けると共に、この受け面に位置確認部を設けることで、部品点数、加工工程を低減して製造コストを大幅に削減することが可能となる。さらに、水道用メータとベース体との間に有効な空隙部を確保することができるので、例えば、水道用メータ全体を断熱材で覆うことが可能となると共に、メータユニット全体をコンパクト化することができ、これにより、メータユニット設置場所の省スペース化が可能となる。 According to the invention which concerns on Claim 1, when the rib of a water meter is mounted in a receiving surface in the state which does not engage with the groove part of a position confirmation part, the one end part of a water meter is an inclined shape of a position confirmation part The meter channel axis and the meter unit body channel axis run on both side edges and the meter unit body channel axis does not match, so it is possible to visually check for erroneous installation of the water meter and reliably prevent erroneous installation. . In addition, since there are no corroded parts such as joints, the corrosion resistance is greatly improved, a meter unit with excellent piping strength is made possible, and a receiving surface is provided on the nut member, and the position is confirmed on this receiving surface. By providing the part, it is possible to reduce the number of parts and processing steps, and to greatly reduce the manufacturing cost. Furthermore, since an effective gap can be secured between the water meter and the base body, for example, the entire water meter can be covered with a heat insulating material, and the entire meter unit can be made compact. As a result, the space for installing the meter unit can be saved.

しかも、水道用メータの下流側底部のリブと位置確認部の溝部とを常時係合可能にした構造であるので、水道用メータを上流側の第一支持機構と下流側の第二支持機構間のどの位置に配置しても、水道用メータのリブと位置確認部の溝部とは確実に係合され、上流側の第一支持機構と下流側の第二支持機構とで挟持する前の支受け状態において、メータが周方向へ傾いたり、回転したりすることなく、水道用メータの流路軸心とメータユニット本体の流路軸心とを一致させた適正な状態で挟圧保持することが可能となり、水道用メータの交換作業などの作業性を飛躍的に向上させることが可能となる。 Moreover , since the rib at the bottom of the downstream side of the water meter and the groove of the position confirmation portion are always engageable, the water meter is connected between the first support mechanism on the upstream side and the second support mechanism on the downstream side. Regardless of the position, the rib of the water meter and the groove of the position confirmation part are securely engaged, and the support before being sandwiched between the upstream first support mechanism and the downstream second support mechanism. In the receiving state, the meter should not be tilted or rotated in the circumferential direction, and the pressure axis of the water meter and the channel axis of the meter unit main body should be held in a proper state by holding the pressure. This makes it possible to dramatically improve workability such as water meter replacement work.

更に、水道用メータが適正でない状態で配置された場合には、水道用メータの流路軸心とメータユニット本体の流路軸心とが一致することがないので、この状態で水道用メータを挟圧保持することができず、しかも、適正でない状態であることを作業者が容易に認識できる状態に水道用メータがおかれるため、確実に誤装着を防止することが可能となる。 Furthermore , if the water meter is placed in an inappropriate state, the channel axis of the water meter and the channel axis of the meter unit body will not match. Since the water meter is placed in a state where it is not possible to hold the pinched pressure and the operator can easily recognize that the state is not appropriate, erroneous mounting can be reliably prevented.

本発明における水道用メータユニットの一実施形態を図面に基づいて説明する。
図1は、水道用メータユニットの構造を示した断面図である。同図に示すように、水道用メータユニット1(以下、メータユニット1という)は、両側に立設した一対の保持部2,3を有するベース体4と、この一対の保持部2,3に対向させて取付した上流側の第一支持機構5、下流側の第二支持機構6と、水道用メータMの誤装着を防止する位置確認部7等から成り、本実施形態において、前記上流側の第一支持機構5は、保持部2に固着された上流側筒状部材8と、この上流側筒状部材8に内挿され、水道用メータMの上流側接続端部(本例では、ネジ部)M1を支受けする円孤状の受け面9を設けたスライド部材10と、このスライド部材10を進退させる回転部材11等から構成され、前記下流側の第二支持機構6は、保持部3に固着された下流側筒状部材12と、この下流側筒状部材12のメータ側外周に螺着され、水道用メータMの下流側接続端部(本例では、ネジ部)M2を支受けする円弧状の受け面13を設けたナット部材14と、このナット部材14の螺着により前記下流側筒状部材12の内部に収容保持される逆止弁カートリッジ15等から構成されている。
An embodiment of a water meter unit according to the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing the structure of a water meter unit. As shown in the figure, a water meter unit 1 (hereinafter referred to as a meter unit 1) includes a base body 4 having a pair of holding portions 2 and 3 erected on both sides, and a pair of holding portions 2 and 3 The first support mechanism 5 on the upstream side, the second support mechanism 6 on the downstream side, and the position confirmation unit 7 that prevents erroneous mounting of the water meter M are installed in the present embodiment. The first support mechanism 5 is inserted into the upstream tubular member 8 fixed to the holding portion 2 and the upstream tubular member 8, and is connected to the upstream connection end of the water meter M (in this example, The slide member 10 provided with an arcuate receiving surface 9 for supporting the screw portion M1 and a rotating member 11 for advancing and retracting the slide member 10 are provided. The second support mechanism 6 on the downstream side is held by The downstream cylindrical member 12 fixed to the portion 3 and the downstream cylindrical member 12 A nut member 14 provided with an arcuate receiving surface 13 that is screwed to the outer periphery of the water meter and supports a downstream connection end portion (screw portion in this example) M2 of the water meter M, and the nut member 14 The check valve cartridge 15 and the like are accommodated and held in the downstream cylindrical member 12 by screwing.

図2は、図1におけるA−A線断面図である。同図に示すように、ベース体4は、長尺状の基部4aを有しており、底部が開放された断面略台形の中空形状であって、断面矩形の中空形状よりも強度が強く、ベース体4の軽量化を図りつつ、水道用メータMを挟圧保持する際の反力に十分耐えられる強度を備えている。保持部2,3は、基部4aから緩やかな局面部を介して起立させており、この保持部2,3には貫通して取付孔2a,3aを設けている。取付孔2a,3aの孔縁周辺は平面状を呈しており、上流側筒状部材8、下流側筒状部材12に設けた後述するフランジ部8a、12aと、上流側筒状部材8、下流側筒状部材12をこの取付孔2a,3aにそれぞれ固着する際に用いる固定ナット16、17が、この平面状に当接するようにしている。また、ベース体4の両端部には、ベース体4を床等に固定するための図示しないボルトが係止する切欠部4b,4bを設けている。勿論であるがこの固定は必須ではない。なお、本例のベース体4は、ダクタイル鋳鉄製であり、その表面全面にエポキシ樹脂紛体塗装(膜厚最大約600μm)を施している。   FIG. 2 is a cross-sectional view taken along the line AA in FIG. As shown in the figure, the base body 4 has an elongated base portion 4a, is a hollow shape with a substantially trapezoidal cross section with an open bottom, and is stronger than a hollow shape with a rectangular cross section, The base body 4 has sufficient strength to withstand the reaction force when holding the water meter M while holding the water meter M while reducing the weight. The holding portions 2 and 3 are erected from the base portion 4a via a gentle phase portion, and the holding portions 2 and 3 are provided with attachment holes 2a and 3a. The periphery of the hole edges of the mounting holes 2a and 3a has a planar shape, and flange portions 8a and 12a, which will be described later, provided in the upstream cylindrical member 8 and the downstream cylindrical member 12, and the upstream cylindrical member 8 and the downstream Fixing nuts 16 and 17 used when the side cylindrical member 12 is fixed to the mounting holes 2a and 3a are in contact with the flat surface. Further, notches 4b and 4b are provided at both ends of the base body 4 so that bolts (not shown) for fixing the base body 4 to the floor or the like are locked. Of course, this fixing is not essential. In addition, the base body 4 of this example is made of ductile cast iron, and an epoxy resin powder coating (film thickness maximum of about 600 μm) is applied to the entire surface.

図3は、位置確認部7の一例を示した斜視図であり、図4は、位置確認部7の一例を示した平面図である。図3に示すように、前記ナット部材14のメータ側外端部の下方位置に水道用メータMの下流側接続端部M2を支受けする受け面13を突設形成しており、この受け面13の先端に位置確認部7を延設している。本例において、この位置確認部7は、水道用メータMの下流側底面の一部を包み込むような舌片状を呈しており、その先端部位には水道用メータMの下流側底部に突設したリブM3と係合する溝部7aが形成されている。この溝部7aは、水道用メータMを上流側の第一支持機構5と下流側の第二支持機構6とで挟持する前の支受け状態において、水道用メータMのリブM3を係止可能な長さに形成されている。   FIG. 3 is a perspective view showing an example of the position confirmation unit 7, and FIG. 4 is a plan view showing an example of the position confirmation unit 7. As shown in FIG. 3, a receiving surface 13 that supports the downstream connection end M <b> 2 of the water meter M is formed to protrude below the meter-side outer end of the nut member 14. A position confirmation portion 7 is extended at the tip of 13. In this example, the position confirmation portion 7 has a tongue-like shape that wraps a part of the bottom surface on the downstream side of the water meter M, and protrudes from the bottom portion of the water meter M at the tip portion thereof. A groove 7a that engages with the rib M3 is formed. The groove portion 7a can lock the rib M3 of the water meter M in a supported state before the water meter M is sandwiched between the first support mechanism 5 on the upstream side and the second support mechanism 6 on the downstream side. It is formed in length.

図4に示すように、溝部7aの流路軸方向の長さBは、水道用メータMが上流側の第一支持機構5と下流側の第二支持機構6間のどの位置に配置されても、水道用メータMのリブM3を確実に係合する長さであり、これにより、水道用メータMのリブM3と溝部7aとは常時係合され、上流側の第一支持機構5と下流側の第二支持機構6とで挟持する前の支受け状態において、水道用メータMが周方向へ傾いたり、回転したりすることなく、水道用メータMの流路軸心Pとメータユニット本体1の流路軸心Qとを一致させた適正な状態で挟圧保持することを可能にしている。なお、図示するように、溝部7aの奥部面を傾斜面としており、本例では、この奥部面を含めて呼び径20Aにおいて、流路軸方向の長さBを約12mmとしている。   As shown in FIG. 4, the length B of the groove portion 7 a in the flow path axis direction is located at which position of the water meter M between the first support mechanism 5 on the upstream side and the second support mechanism 6 on the downstream side. Also, the length is such that the rib M3 of the water meter M is surely engaged, whereby the rib M3 of the water meter M and the groove 7a are always engaged, and the first support mechanism 5 on the upstream side and the downstream side In the support state before being sandwiched between the second support mechanism 6 on the side, the water flow meter M does not tilt or rotate in the circumferential direction, and the flow axis P and the meter unit main body of the water meter M It is possible to hold the pinching pressure in an appropriate state in which the channel axis Q of one channel is matched. As shown in the figure, the inner surface of the groove 7a is an inclined surface, and in this example, the length B in the channel axis direction is about 12 mm in the nominal diameter 20A including the inner surface.

また、図4に示すように、ナット部材14のメータ側外端部から位置確認部7の先端7bまでの長さCは、上流側の第一支持機構5の後述するスライド部材10が最も後退した状態であって、このスライド部材10の挟持面10dに水道用メータMの上流側の接続端面を当接した場合に、水道用メータMのリブM3と溝部7aとを係合可能にする長さで、かつ、下流側へ押圧される水道用メータMにその先端7bが干渉しない長さに設定されている。   Further, as shown in FIG. 4, the length C from the meter side outer end of the nut member 14 to the tip 7b of the position confirmation portion 7 is the most retracted by the slide member 10 described later of the upstream first support mechanism 5. In this state, when the connection end surface on the upstream side of the water meter M is brought into contact with the sandwiching surface 10d of the slide member 10, the rib M3 of the water meter M and the groove portion 7a can be engaged with each other. Now, the length is set such that the tip 7b does not interfere with the water meter M pressed to the downstream side.

図5は、上流側・下流側を誤った向きで配置したメータの状態説明図である。同図に示すように、水道用メータMがその上流側・下流側を誤った向きでメータユニット本体1に配置された場合、前記位置確認部7の先端7bが水道用メータMの底部膨出部位に干渉して、この水道用メータMを上方へ持ち上げた傾斜状態にして、水道用メータMの流路軸心Pとメータユニット本体1の流路軸心Qとを不一致にさせる。これにより、水道用メータMを正しく挟圧保持することができず、しかも、水道用メータMの接続端面と第二支持機構6のメータ側端面との間に隙間が生じるので、通水した場合にはこの隙間から水が漏れることにより、その適正でない状態は明らかとなり、水道用メータMの誤装着を防止することを可能にしている。なお、本例では、同図に示す水道用メータMの流路軸心Pとメータユニット本体1の流路軸心Qとがなす角度θは約9°である。   FIG. 5 is a state explanatory view of a meter in which the upstream side and the downstream side are arranged in the wrong direction. As shown in the figure, when the water meter M is arranged in the meter unit main body 1 with the upstream side and the downstream side in the wrong direction, the tip 7b of the position confirmation unit 7 is bulged at the bottom of the water meter M. By interfering with the site, the water meter M is inclined upward and the flow path axis P of the water meter M and the flow path axis Q of the meter unit body 1 are made inconsistent. As a result, the water meter M cannot be correctly pinched and held, and there is a gap between the connection end surface of the water meter M and the meter side end surface of the second support mechanism 6, so that water is passed. In this case, when water leaks from this gap, the inappropriate state becomes clear, and it is possible to prevent erroneous installation of the water meter M. In this example, the angle θ formed by the flow path axis P of the water meter M and the flow path axis Q of the meter unit main body 1 shown in FIG.

図6は、下流側の第二支持機構の一例を示した断面図である。同図に示すように、位置確認部7の両側縁部7c,7cは、先端7bに向けて傾斜(本例では、約20°)した形状を有しており、水道用メータMが正しい向きでメータユニット本体1に配置された場合には、縁部7cが水道用メータMの下流側底面に干渉しないように設けている。具体的には、受け面13を周方向に約120°の範囲で円孤状に形成しているのに対し、位置確認部7は受け面13の両縁部13a,13aから位置確認部7の先端7b,7bへ約20°の傾斜角度を有して形成され、この先端7bは周方向に対して略平面形状となっている。なお、図4に示すように、位置確認部7の先端幅Dは、呼び径20Aにおいて約20mm、呼び径25Aにおいて約25mmとしている。   FIG. 6 is a cross-sectional view showing an example of the second support mechanism on the downstream side. As shown in the figure, both side edge portions 7c and 7c of the position confirmation portion 7 have a shape inclined (about 20 ° in this example) toward the tip 7b, and the water meter M is in the correct orientation. When the meter unit body 1 is disposed, the edge 7c is provided so as not to interfere with the bottom surface on the downstream side of the water meter M. Specifically, while the receiving surface 13 is formed in an arc shape in a range of about 120 ° in the circumferential direction, the position confirmation unit 7 is formed from both edges 13a and 13a of the receiving surface 13 to the position confirmation unit 7. The tips 7b, 7b are formed with an inclination angle of about 20 °, and the tip 7b has a substantially planar shape with respect to the circumferential direction. In addition, as shown in FIG. 4, the front end width D of the position confirmation part 7 is about 20 mm for the nominal diameter 20A and about 25 mm for the nominal diameter 25A.

図7は、位置確認部の作用説明図である。同図に示すように、水道用メータMのリブM3が位置確認部7の溝部7aに係合しないで受け面13に載置された際には、水道用メータMがその重心位置の移動により回転を生ずる傾斜角α(本例ではα=約20〜30°)まで、位置確認部7の先端7bから受け面13の縁部13aに架けて設けた傾斜部7cに乗り上げるように形成されており、これにより、水道用メータMの流路軸心Pとメータユニット本体1の流路軸心Qとは一致することなく、水道用メータMの誤装着を防止することを可能にしている。   FIG. 7 is an explanatory diagram of the operation of the position confirmation unit. As shown in the figure, when the rib M3 of the water meter M is placed on the receiving surface 13 without engaging with the groove portion 7a of the position confirmation portion 7, the water meter M is moved by the movement of the center of gravity position. It is formed so as to ride on an inclined portion 7c provided from the tip 7b of the position confirmation portion 7 to the edge portion 13a of the receiving surface 13 up to an inclination angle α (in this example, α = about 20 to 30 °) that causes rotation. Thus, the flow channel axis P of the water meter M and the flow channel axis Q of the meter unit main body 1 do not coincide with each other, and it is possible to prevent erroneous installation of the water meter M.

また、水道用メータMがその重心の移動によって回転を生ずる傾斜角αが約15°よりも小さいと、水道用メータMの下流側接続端部M2と受け面13との摩擦力が、水道用メータMの自重により回転する力を上回って水道用メータMが横倒れしないので、水道用メータMがα=15°以上傾くまで、より好ましくはα=20〜25°傾くまで傾斜部7cに乗り上げるような位置確認部7の先端幅Dの寸法を設定するのが好ましい。また、α=30°を越えるような傾斜角となるまで先端幅Dを広くするのは、位置確認部7を不必要に大きくしてしまうので、好ましくない。   Further, when the inclination angle α at which the water meter M rotates due to the movement of the center of gravity is smaller than about 15 °, the frictional force between the downstream connection end M2 of the water meter M and the receiving surface 13 is reduced. Since the water meter M does not fall sideways exceeding the rotating force due to its own weight, it rides on the inclined portion 7c until the water meter M is inclined by α = 15 ° or more, more preferably, α = 20-25 °. It is preferable to set the size of the tip width D of the position confirmation part 7 as described above. Also, it is not preferable to increase the tip width D until the inclination angle exceeds α = 30 °, because the position confirmation unit 7 is unnecessarily enlarged.

前記受け面13は切削加工により仕上げており、水道用メータMの下流側接続端部M2を正確に支受けするようにしているのに対して、位置確認部7は、水道用メータMの誤配置を防止するために非加工面(例えば、鋳肌面)としている。このため、位置確認部7の内径は、受け面13の内径よりもやや大径としており、一例として、呼び径20Aで約17mmとしている。上記したように、本例では、位置確認部7を非加工面として、受け面13を切削加工しているので、加工工数・時間を短縮可能にしている。   The receiving surface 13 is finished by cutting, so that the downstream connection end M2 of the water meter M is correctly supported. In order to prevent the arrangement, a non-processed surface (for example, a cast surface) is used. For this reason, the inner diameter of the position confirmation portion 7 is slightly larger than the inner diameter of the receiving surface 13, and as an example, the nominal diameter 20A is about 17 mm. As described above, in this example, since the position confirmation unit 7 is set as a non-processed surface and the receiving surface 13 is cut, the number of processing steps and time can be shortened.

ここで、本実施形態において一例として示す上流側の第一支持機構について説明する。
図8は、上流側の第一支持機構5の構造を示した断面図である。同図に示すように、上流側筒状部材8の外周にフランジ部8aを設けており、上流側筒状部材8を保持部2の取付孔2aに一次側から挿入したとき、このフランジ部8aが保持部2の取付孔縁部に係止するようにしている。メータ側外周には雄ネジ部(平行雄ネジ)8bを形成しており、この上流側筒状部材8を保持部2に固着する際の固定ナット16と、この上流側筒状部材8に内挿されるスライド部材10を進退させる回転部材11を螺着する。
Here, the upstream first support mechanism shown as an example in the present embodiment will be described.
FIG. 8 is a cross-sectional view showing the structure of the first support mechanism 5 on the upstream side. As shown in the figure, a flange portion 8a is provided on the outer periphery of the upstream cylindrical member 8, and when the upstream cylindrical member 8 is inserted into the mounting hole 2a of the holding portion 2 from the primary side, the flange portion 8a. Is engaged with the edge of the mounting hole of the holding portion 2. A male screw portion (parallel male screw) 8b is formed on the outer circumference of the meter, and a fixing nut 16 for fixing the upstream cylindrical member 8 to the holding portion 2 and an inner side of the upstream cylindrical member 8 are provided. A rotating member 11 for advancing and retracting the inserted slide member 10 is screwed.

スライド部材10は、上流側筒状部材8に内挿される筒状部10aと、回転部材11により押圧される環状フランジ部10bから成り、前記筒状部10aは、Oリング18を介して、上流側筒状部材8の内周面に摺接するようにしている。前記環状フランジ部10bは、上流側筒状部材8の外周に形成された雄ネジ部8bよりも大径であり、メータ側端面10cには、水道用メータMの上流側接続端部M1の外径に対応した挟持面10dをこのメータ側端面10cよりも一段低いインロー構造に形成しており、また、この挟持面10dには、水道用メータMとの間をシールするOリング19を配置している。なお、挟持面10dのみを切削加工し、メータ側端面10cは鋳放面、或いは鍛上がり面としており、また、Oリング19は環状であれば他のシール部材形状であってもよい。   The slide member 10 includes a cylindrical portion 10 a inserted into the upstream cylindrical member 8 and an annular flange portion 10 b pressed by the rotating member 11, and the cylindrical portion 10 a is upstream of the O ring 18. The side cylindrical member 8 is in sliding contact with the inner peripheral surface. The annular flange portion 10b has a larger diameter than the male screw portion 8b formed on the outer periphery of the upstream side cylindrical member 8, and the meter side end surface 10c is provided outside the upstream connection end portion M1 of the water meter M. The sandwiching surface 10d corresponding to the diameter is formed in an inlay structure that is one step lower than the meter-side end surface 10c, and an O-ring 19 that seals against the water meter M is disposed on the sandwiching surface 10d. ing. Only the clamping surface 10d is cut, the meter side end surface 10c is a cast surface or a forged surface, and the O-ring 19 may be in the form of another seal member as long as it is annular.

前記環状フランジ部10bのメータ側端面10c下方位置には、水道用メータMの上流側接続端部M1を支受けする円孤状の受け面9を突設形成している。この受け面9の最下部には、スライド部材10の進退方向へ延びる案内溝9aを設けており、この案内溝9aにベース体4上面に突設した円柱状の突起部20を係合させることで、回転部材11の回転に伴ってスライド部材10が回転するのを防止しつつ、スライド部材10を進退方向へ案内している。   An annular receiving surface 9 for supporting the upstream connection end M1 of the water meter M is formed to project from a position below the meter side end surface 10c of the annular flange portion 10b. A guide groove 9a extending in the advancing / retreating direction of the slide member 10 is provided at the lowermost portion of the receiving surface 9, and a cylindrical protrusion 20 protruding from the upper surface of the base body 4 is engaged with the guide groove 9a. Thus, the slide member 10 is guided in the forward / backward direction while preventing the slide member 10 from rotating with the rotation of the rotary member 11.

回転部材11の内周には、上流側筒状部材8の外周に形成された雄ネジ部8bと螺合する雌ネジ部11aを形成している。この雌ネジ部11aよりもメータ側を大径部として段部面11bを形成しており、回転部材11が進出する際には、この段部面11bが前記スライド部材10の環状フランジ部10b背面を押圧するようにしている。また、スライド部材10の環状フランジ部10b外面を回転部材11の大径部内面に内接させるようにしており、この回転部材11は、スライド部材10によって調芯された状態で回転できるようにしている。回転部材11のメータ側端部内周には、スライド部材10を係止するための止め輪21を嵌合しており、回転部材11の後退に伴って、スライド部材10を一緒に後退させるようにしている。また、回転部材11の外周面は、回転部材11を手動操作するためのフィン状の把持部11cを放射状に設けており、各把持部11cには貫通孔11dを形成している。この貫通孔11dと保持部2の上部に設けた孔部2bとを図示しない結束バンド等で締結可能としており、回転部材11の不用意な回転を阻止し、水道用メータMの好適な挟持状態を確実に維持できるようにしている。   On the inner periphery of the rotating member 11, a female screw portion 11 a that is screwed with a male screw portion 8 b formed on the outer periphery of the upstream cylindrical member 8 is formed. A stepped surface 11b is formed with the meter side larger than the female threaded portion 11a, and when the rotating member 11 advances, the stepped surface 11b is the back surface of the annular flange portion 10b of the slide member 10. To press. Further, the outer surface of the annular flange portion 10b of the slide member 10 is inscribed in the inner surface of the large-diameter portion of the rotating member 11, and the rotating member 11 can be rotated while being aligned by the slide member 10. Yes. A retaining ring 21 for locking the slide member 10 is fitted to the inner periphery of the meter side end of the rotary member 11 so that the slide member 10 can be retracted together with the retraction of the rotary member 11. ing. Further, the outer peripheral surface of the rotating member 11 is provided with fin-shaped gripping portions 11c for manually operating the rotating member 11, and each gripping portion 11c has a through hole 11d. The through-hole 11d and the hole 2b provided on the upper part of the holding part 2 can be fastened with a binding band or the like (not shown) to prevent inadvertent rotation of the rotating member 11, and a suitable clamping state of the water meter M Is surely maintained.

本例では、図1に示すように、上流側筒状部材8に90度に屈曲したエルボ22を延設しており、このエルボ22は、上流側筒状部材8が保持部2に固着されていても、その向きを変えることができるように、保持部2と固定ナット16との間にNBR等の弾性部材からなるワッシャ23を介在させて、このワッシャ23の弾性力により、固定ナット16を取り外すことなく、適度な摩擦力の下でこのエルボ22の向きを自由に変えることができる。また、同図に示すように、エルボ22の上流側端部にはユニオンナット24を設けており、止水栓25や図示しない減圧弁などをその向きを適切に調整した状態で接続するようにしている。これにより、止水栓25、接続器具等をユニットとして提供可能にしている。なお、図中26は、管端防食コアである。   In this example, as shown in FIG. 1, an elbow 22 bent at 90 degrees is extended to the upstream cylindrical member 8, and the upstream cylindrical member 8 is fixed to the holding portion 2. However, a washer 23 made of an elastic member such as NBR is interposed between the holding portion 2 and the fixing nut 16 so that the direction of the fixing nut 16 can be changed. The direction of the elbow 22 can be freely changed under an appropriate frictional force without removing the. Further, as shown in the figure, a union nut 24 is provided at the upstream end of the elbow 22 so that the stop cock 25, a pressure reducing valve (not shown) and the like are connected in a state where the direction thereof is appropriately adjusted. ing. Thereby, the water stop cock 25, a connection tool, etc. can be provided as a unit. In the figure, reference numeral 26 denotes a pipe end anticorrosion core.

次に、下流側の第二支持機構について説明する。
図6に示すように、下流側筒状部材12の外周面にはフランジ部12aを設けており、下流側筒状部材12を保持部3の取付孔3aに一次側から挿入したとき、このフランジ部12aが保持部3の取付孔縁部に係止するようにしている。二次側端部外周には雄ネジ部(平行雄ネジ)12bを形成しており、この下流側筒状部材12を保持部3に固着する際の固定ナット17を螺着する。また、二次側端部内周には管用雌ネジ部12cを形成しており、管端防食コア26を介して、下流側の配管を接続可能にしている。下流側筒状部材12は、一次側に円筒部12dを延設しており、この円筒部12dの内部に逆止弁カートリッジ15を収容している。また、円筒部12dの外周には、ナット部材14の雌ネジ部14aと螺合する雄ネジ部12eを形成しており、この雄ネジ部12eよりメータ側には、この円筒部12dとナット部材14とをシールするためのOリング27を配置している。
Next, the downstream second support mechanism will be described.
As shown in FIG. 6, a flange portion 12 a is provided on the outer peripheral surface of the downstream side cylindrical member 12, and when the downstream side cylindrical member 12 is inserted into the mounting hole 3 a of the holding portion 3 from the primary side, this flange is provided. The portion 12 a is locked to the edge of the mounting hole of the holding portion 3. A male screw portion (parallel male screw) 12b is formed on the outer periphery of the secondary side end portion, and a fixing nut 17 for fixing the downstream side cylindrical member 12 to the holding portion 3 is screwed. Also, a pipe internal thread portion 12 c is formed on the inner periphery of the secondary side end portion, and a downstream side pipe can be connected via the pipe end anticorrosion core 26. The downstream cylindrical member 12 has a cylindrical portion 12d extending on the primary side, and a check valve cartridge 15 is accommodated in the cylindrical portion 12d. Further, a male screw portion 12e that is screwed with the female screw portion 14a of the nut member 14 is formed on the outer periphery of the cylindrical portion 12d, and the cylindrical portion 12d and the nut member are provided on the meter side of the male screw portion 12e. An O-ring 27 for sealing 14 is disposed.

ナット部材14の内周には、逆止弁カートリッジ15の端部と嵌合する段部面14bを設けており、下流側筒状部材12の内部に収容保持される逆止弁カートリッジ15は、弁座外周に配置したOリング28の弾発力を利用して、ナット部材14の段部面14bに液密に嵌合されている。下流側筒状部材12からナット部材14を取り外すと、ナット部材14に伴ってこの逆止弁カートリッジ15を一緒に取り出すことができる。図3及び図4に示すように、ナット部材14の外周面には、手動操作によって着脱させるハンドル、本例ではフィン状の把持部12gを放射状に形成しており、本例では、内周面に形成した雌ネジ部14aの形成領域にかかるように設けている。   On the inner periphery of the nut member 14, a step surface 14 b that fits with the end of the check valve cartridge 15 is provided, and the check valve cartridge 15 that is accommodated and held inside the downstream tubular member 12 is The elastic force of the O-ring 28 arranged on the outer periphery of the valve seat is used to fit the stepped surface 14b of the nut member 14 in a liquid-tight manner. When the nut member 14 is removed from the downstream cylindrical member 12, the check valve cartridge 15 can be taken out together with the nut member 14. As shown in FIGS. 3 and 4, the outer peripheral surface of the nut member 14 is radially formed with a handle that is attached and detached by manual operation, in this example, fin-shaped gripping portions 12g. In this example, the inner peripheral surface It is provided so as to cover the formation region of the female screw portion 14a formed in the above.

ナット部材14のメータ側外端部の下方位置には、水道用メータMの下流側接続端部M2を支受けする円孤状の受け面13を設けている。また、本例では、ナット部材14を下流側筒状部材12に螺着する際、下流側筒状部材12の外端面12fと、ナット部材14の内端面14cとが当接した位置を両者の螺合終端位置とすると共に、前記ナット部材14に突設した受け面13を水平度を有する位置であるナット部材14の下方位置にセットして、水道用メータMの下流側接続端部M2を適正位置で支受けするようにしている。   An arcuate receiving surface 13 that supports the downstream connection end M2 of the water meter M is provided at a position below the outer end of the nut member 14 on the meter side. In this example, when the nut member 14 is screwed to the downstream cylindrical member 12, the position where the outer end surface 12f of the downstream cylindrical member 12 and the inner end surface 14c of the nut member 14 are in contact with each other is determined. The receiving end 13 projecting from the nut member 14 is set at a position below the nut member 14 which is a level, and the downstream connection end M2 of the water meter M is set as a screwing end position. It is supported at an appropriate position.

前記ナット部材14のメータ側端面14dには、水道用メータMの下流側接続端部M2の外径に対応した挟持面14eをこのメータ側端面14dよりも一段低いインロー構造に形成している。この挟持面14eにOリング29を配置して、挟持面14eと水道用メータMの下流側の接続端面との間をシールしている。なお、挟持面14eのみを切削加工し、メータ側端面14dは鋳放面、或いは鍛上がり面としており、また、Oリング29は環状であれば他のシール部材形状であってもよい。   On the meter side end surface 14d of the nut member 14, a holding surface 14e corresponding to the outer diameter of the downstream connection end M2 of the water meter M is formed in an inlay structure that is one step lower than the meter side end surface 14d. An O-ring 29 is disposed on the clamping surface 14e to seal between the clamping surface 14e and the connection end surface on the downstream side of the water meter M. Only the clamping surface 14e is cut, the meter side end surface 14d is a cast surface or a forged surface, and the O-ring 29 may be in the form of another seal member as long as it is annular.

次に、上記実施形態の作用を説明する。
上流側の第一支持機構5、下流側の第二支持機構6の各受け面9、13に水道用メータMの接続端部M1,M2をそれぞれ載置して、第一支持機構5、第二支持機構6の流路と水道用メータMの流路とを同軸上に位置させると共に、水道用メータMのリブM3を位置確認部7の溝部7aに嵌めて、水道用メータMの方向性の確認及び水道用メータMの横ずれや回転の防止を図る。このとき、水道用メータMの接続端部M1,M2を支受けする受け面9、13が円孤状に形成されているので載置し易い。さらに、第一支持機構5の回転部材11をハンドル、本例では把持部11cを介して手動操作し、スライド部材10を進出させる。これにより、水道用メータMを下流側に押圧して、スライド部材10の挟持面10dとナット部材14の挟持面14eとで、この水道用メータMを挟持すると共に、各挟持面10d、14eに装着したOリング19、29で、各挟持面10d、14eと水道用メータMの上流側・下流側の接続端面とをそれぞれ液密にシールして、メータユニット本体1に水道用メータMを接続する。その後、水道本管への流路を開き、次いで第一支持機構5の上流に設けた止水栓25のハンドル25aを適宜方向に回し、ボール25bを回転させて流路を連通する。
Next, the operation of the above embodiment will be described.
The connection ends M1 and M2 of the water meter M are placed on the receiving surfaces 9 and 13 of the first support mechanism 5 on the upstream side and the second support mechanism 6 on the downstream side, respectively. The channel of the two support mechanism 6 and the channel of the water meter M are positioned coaxially, and the rib M3 of the water meter M is fitted into the groove 7a of the position confirmation unit 7 so that the direction of the water meter M is increased. And prevention of lateral displacement and rotation of the water meter M. At this time, since the receiving surfaces 9 and 13 that support the connection ends M1 and M2 of the water meter M are formed in a circular arc shape, they are easy to place. Further, the rotary member 11 of the first support mechanism 5 is manually operated via a handle, in this example, the grip portion 11c, and the slide member 10 is advanced. As a result, the water meter M is pressed downstream, and the water meter M is held between the holding surface 10d of the slide member 10 and the holding surface 14e of the nut member 14, and the holding surfaces 10d and 14e With the O-rings 19 and 29 attached, the clamping surfaces 10d and 14e and the upstream and downstream connection end surfaces of the water meter M are sealed in a liquid-tight manner, and the water meter M is connected to the meter unit main body 1. To do. Thereafter, the flow path to the water main is opened, and then the handle 25a of the stop cock 25 provided upstream of the first support mechanism 5 is rotated in an appropriate direction, and the ball 25b is rotated to connect the flow path.

一方、メータユニット本体1から水道用メータMを取り外す場合は、止水栓25のハンドル25aを適宜方向に回し、ボール25bを回転させて流路を閉塞して、水道本管と水道用メータMとの間の流路を閉ざした後、第一支持機構5の回転部材11を回転操作してスライド部材10を後退させ、水道用メータMを挟圧保持していた力を解除して水道用メータMを離脱可能にする。   On the other hand, when removing the water meter M from the meter unit main body 1, the handle 25a of the stop cock 25 is rotated in an appropriate direction, the ball 25b is rotated to close the flow path, and the water main and the water meter M are closed. After the flow path between the two is closed, the rotary member 11 of the first support mechanism 5 is rotated to retract the slide member 10, and the water holding the water meter M is released to release the force. The meter M can be detached.

メンテナンス作業や取替え作業等で、水道用メータをメータユニット本体1へ取付する場合、メータユニット1に設けた位置確認部7によって、水道用メータMが上流側の第一支持機構5と下流側の第二支持機構6間のどの位置に配置されても、水道用メータMのリブM3と位置確認部7の溝部7aとは確実に係合され、上流側の第一支持機構5と下流側の第二支持機構6とで挟持する前の支受け状態において、水道用メータMが周方向へ傾いたり、回転したりすることなく、水道用メータMの流路軸心Pとメータユニット本体1の流路軸心Qとを一致させた適正な状態で挟圧保持することができる。   When a water meter is attached to the meter unit main body 1 for maintenance work or replacement work, the water meter M is connected to the first support mechanism 5 on the upstream side and the downstream side by the position confirmation unit 7 provided on the meter unit 1. Regardless of the position between the second support mechanisms 6, the rib M3 of the water meter M and the groove 7a of the position confirmation part 7 are securely engaged, and the first support mechanism 5 on the upstream side and the downstream side The water meter M is not tilted or rotated in the circumferential direction in the support state before being sandwiched between the second support mechanism 6 and the flow path axis P of the water meter M and the meter unit main body 1 It is possible to hold and hold the pressure in an appropriate state in which the channel axis Q is matched.

また、水道用メータMがその上流側・下流側を誤った向きでメータユニット本体1に配置された場合には、前記位置確認部7の先端7bが水道用メータMの底部膨出部位に干渉して、この水道用メータMを上方へ持ち上げた傾斜状態にして、水道用メータMの流路軸心Pとメータユニット本体1の流路軸心Qとを不一致にさせるため、水道用メータMを正しく挟圧保持することができず、しかも、水道用メータMの接続端面と第二支持機構6のメータ側端面との間に隙間が生じて、その適正でない状態は明らかとなり、水道用メータMの誤装着を防止することができる。   Further, when the water meter M is arranged in the meter unit main body 1 with the upstream side and the downstream side in the wrong direction, the tip 7b of the position confirmation unit 7 interferes with the bottom bulge portion of the water meter M. Then, in order to make the water meter M inclined upward and make the flow path axis P of the water meter M and the flow axis Q of the meter unit body 1 inconsistent, the water meter M Can not be held properly, and a gap is formed between the connection end surface of the water meter M and the meter side end surface of the second support mechanism 6, and the inappropriate state becomes clear. Mismounting of M can be prevented.

さらに、水道用メータMの上流側・下流側が正しい向きであっても、水道用メータMのリブM3が位置確認部7の溝部7aに係合しないで受け面13に載置された場合には、水道用メータMがその重心位置の移動により回転を生ずる傾斜角α(本例ではα=約20〜30°)まで、位置確認部7の先端7bから受け面13の縁部13aに架けて設けた傾斜状の両側縁部7cに乗り上げるように形成されており、これにより、水道用メータMの流路軸心Pとメータユニット本体1の流路軸心Qとは不一致となる。また、水道用メータMが、位置確認部7の形成領域を越えて大きく傾斜した状態で受け面13に載置された場合には、水道用メータMはその重心の移動により回転して横倒れ状態となり、水道用メータMの誤装着を防止することができる。
従って、水道用メータMの方向性が誤っていたり、水道用メータMのリブM3が位置確認部7の溝部7aに正しく係合していない場合には、水道用メータMの流路軸心Pとメータユニット本体1の流路軸心Qとの不一致現象、あるいは水道用メータMの回転横倒れ現象のいずれかの現象により、水道用メータMの誤装着を必ず視認することができ、誤装着を防止することができる。
Furthermore, even when the upstream and downstream sides of the water meter M are in the correct orientation, the rib M3 of the water meter M is placed on the receiving surface 13 without being engaged with the groove 7a of the position confirmation unit 7. From the tip 7b of the position confirmation portion 7 to the edge portion 13a of the receiving surface 13 up to an inclination angle α (α = about 20 to 30 ° in this example) where the water meter M rotates due to the movement of the center of gravity. It forms so that it may ride on the provided both-sides edge part 7c of the inclined shape, and, thereby, the flow-path center P of the water meter M and the flow-path center Q of the meter unit main body 1 do not correspond. In addition, when the water meter M is placed on the receiving surface 13 in a state of being greatly inclined beyond the region where the position confirmation unit 7 is formed, the water meter M rotates and falls sideways due to the movement of its center of gravity. Thus, the water meter M can be prevented from being erroneously attached.
Therefore, if the direction of the water meter M is wrong or the rib M3 of the water meter M is not correctly engaged with the groove portion 7a of the position confirmation unit 7, the flow path axis P of the water meter M is obtained. And the meter unit main body 1 flow path axis Q mismatch or the water meter M rotation sideways phenomenon, it is always possible to visually check the incorrect installation of the water meter M Can be prevented.

図9は、水道用メータMを断熱材30で覆った状態を示した断面図である。同図に示すように、準寒冷地といわれる地域において、メータユニット1を使用する場合には、水道用メータとベース体の間に広く確保された間隙部位より断熱材30を装入して、水道用メータMを断熱材30で覆って凍結を簡易的に防止することができ、さらに、水道用メータユニット1の全周囲を断熱材30で被覆することもできる FIG. 9 is a cross-sectional view showing a state in which the water meter M is covered with the heat insulating material 30. As shown in the figure, when using the meter unit 1 in an area called a semi-cold region, insert the heat insulating material 30 from a gap portion widely secured between the water meter and the base body, The water meter M can be covered with the heat insulating material 30 to prevent freezing, and the entire periphery of the water meter unit 1 can be covered with the heat insulating material 30 .

本発明における水道用メータユニットの構造を示した断面図である。It is sectional drawing which showed the structure of the meter unit for water supplies in this invention. 図1におけるA−A線断面図である。It is the sectional view on the AA line in FIG. 位置確認部の一例を示した斜視図である。It is the perspective view which showed an example of the position confirmation part. 位置確認部の一例を示した平面図である。It is the top view which showed an example of the position confirmation part. 上流側・下流側を誤った向きで配置した水道用メータの状態説明図である。It is a state explanatory view of the water meter which arranged the upstream side and the downstream side in the wrong direction. 下流側の第二支持機構の一例を示した断面図である。It is sectional drawing which showed an example of the 2nd support mechanism of the downstream. 位置確認部の作用説明図である。It is operation | movement explanatory drawing of a position confirmation part. 上流側の第一支持機構の一例を示した断面図である。It is sectional drawing which showed an example of the 1st support mechanism of an upstream. 水道用メータを断熱材で覆った状態を示した断面図である。It is sectional drawing which showed the state which covered the water meter with the heat insulating material. 従来例を示した説明図である。It is explanatory drawing which showed the prior art example.

符号の説明Explanation of symbols

1 水道用メータユニット(メータユニット本体)
2,3 保持部
4 ベース体
5 上流側の第一支持機構
6 下流側の第二支持機構
7 位置確認部
7a 溝部
12 下流側筒状部材
13 受け面
14 ナット部材
M 水道用メータ
M1 上流側接続端部
M2 下流側接続端部
M3 リブ
P 流路軸心
Q 流路軸心
1 Water meter unit (meter unit body)
2, 3 Holding part 4 Base body 5 First support mechanism on the upstream side 6 Second support mechanism on the downstream side 7 Position confirmation part 7a Groove part 12 Downstream cylindrical member 13 Receiving surface 14 Nut member M Water meter M1 Upstream connection End M2 Downstream connection end M3 Rib P Channel axis Q Channel axis

Claims (1)

ベース体の両側に保持部を立設し、この保持部に水道用メータの両端部を支持する上流側の第一支持機構と下流側の第二支持機構を取り付けた水道用メータユニットにおいて、前記下流側の第二支持機構は、筒状部材に螺着したナット部材から成り、このナット部材の外端部の下方位置に水道用メータの一端部を支受けする円弧状の受け面を突設形成し、この受け面の先端に、水道用メータの下流側底面の一部を包み込む舌片状の位置確認部を水平方向に一体に延設し、この位置確認部の先端側には、水道用メータの下流側底部のリブを係止する溝部を形成すると共に、前記受け面の両端縁部の先端側から位置確認部の両側先端に向けて下方に傾斜する傾斜状の両側縁部を形成し、前記リブが前記溝部に係合しないとき、水道用メータの一端部が前記両側縁部に乗り上げるようにしたことを特徴とする水道用メータユニット。 In the water meter unit in which the holding portion is erected on both sides of the base body, and the first support mechanism on the upstream side and the second support mechanism on the downstream side that support both ends of the water meter are attached to the holding portion, the second supporting mechanism of the downstream side consists of a nut member which is screwed to the tubular member, projecting the arc-shaped receiving surface to receive supporting one end portion of the water for meter below the outer end of the nut member formed, at the tip of the receiving surface, and integrally extending a tongue-like position confirmation section enclosing a portion of the downstream side bottom surface of the water for meters horizontally, the distal end side of the position confirming unit, water Grooves that lock the ribs at the bottom of the downstream side of the meter are formed, and inclined side edges that incline downward from the tip side of the both end edges of the receiving surface toward both side tips of the position confirmation part When the rib does not engage with the groove, one end of the water meter Water for the meter unit but which is characterized in that as rides on the side edge portions.
JP2003415719A 2003-12-12 2003-12-12 Water meter unit Expired - Lifetime JP4503278B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11609112B2 (en) 2020-05-12 2023-03-21 The Ford Meter Box Company, Inc. Meter box having adjustable length meter couplings

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03137520A (en) * 1989-10-23 1991-06-12 Yokosukashi Fitting device of meter
JPH11131538A (en) * 1997-10-24 1999-05-18 Kitz Corp Supporting device for water meter
JP2003270024A (en) * 2002-03-15 2003-09-25 Maezawa Kyuso Industries Co Ltd Meter release for water supply

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03137520A (en) * 1989-10-23 1991-06-12 Yokosukashi Fitting device of meter
JPH11131538A (en) * 1997-10-24 1999-05-18 Kitz Corp Supporting device for water meter
JP2003270024A (en) * 2002-03-15 2003-09-25 Maezawa Kyuso Industries Co Ltd Meter release for water supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11609112B2 (en) 2020-05-12 2023-03-21 The Ford Meter Box Company, Inc. Meter box having adjustable length meter couplings

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