JP3756277B2

JP3756277B2 - Pressure gauge that can change the viewing angle of scale and pointer

Info

Publication number: JP3756277B2
Application number: JP02430797A
Authority: JP
Inventors: 田寿治和
Original assignee: SMC Corp
Current assignee: SMC Corp
Priority date: 1997-01-23
Filing date: 1997-01-23
Publication date: 2006-03-15
Anticipated expiration: 2017-01-23
Also published as: JPH10206265A

Description

【０００１】
【発明の属する技術分野】
本発明は、目盛及び指針の視認角度を変更可能な圧力計に関するものであり、更に詳しくは、圧力計の使用角度に関係なく常に目盛及び指針を見易い角度に変更することができる、視認性に勝れた圧力計に関するものである。
【０００２】
【従来の技術】
圧力調整弁等の流体圧機器には、一般に、使用流体圧を測定するための圧力計が取り付けられる。このような圧力計を取付方式によって大別すると、例えば図１０に示す圧力計１Ａように、外周にテーパねじや平行ねじ等を切ったエア導管兼用の取付軸２を、流体圧機器に設けたねじ孔にねじ込む方式のものや、図１１に示す圧力計１Ｂのように、ケース３の複数箇所に設けた取付螺子４で流体圧機器に固定する方式のものなどがある。
【０００３】
上記圧力計１Ａ又は１Ｂを流体圧機器に取り付けた場合、図１２のＡ又はＢに圧力計１Ａに代表させて示すように、流体圧機器６の使用角度によっては該圧力計１Ａが横向きや上下逆向きとなることがあり、このような場合には目盛が非常に読みずらい。そこで通常は、目盛が上下方向を向くように圧力計１Ａの視認角度を変更している。
【０００４】
ところが、図１０に示すような圧力計１Ａにおいては、取付軸２に切ったねじがテーパねじである場合、視認角度を該取付軸２のねじ込みトルクやねじ込み位置等によって変更しなければならず、また、取付軸２に切ったねじが平行ねじである場合には、パッキンの厚さやその潰し量の大小等によって視認角度を変更しなければならないため、いずれの場合も変更作業が非常に面倒で、適正な角度に変更できないことも多い。
【０００５】
一方、図１１に示すような圧力計１Ｂにおいては、その視認角度を、取付螺子４の数に応じた角度にしか変更することができないため、該圧力計１Ｂを流体圧機器６の使用角度に応じた適正な向きに変更できる確率は非常に低い。
【０００６】
しかも、上記何れの取付方式の圧力計においても、角度の変更作業に工具類を必要とするとか、流体圧機器から一旦取り外さなければならないため、落下による精度低下や破損等の不測の事態を招き易いとか、再装着時にシール剤やシール部材等を必要とする上に、流体漏れがないことを厳重に確認しなければならないため作業が面倒である、といった多くの問題を有している。
【０００７】
【発明が解決しようとする課題】
本発明の主要な技術的課題は、流体圧機器への取付方式や取付角度等に関係なく、目盛及び指針を最も読み取り易い視認角度に簡単且つ確実に変更することができる、視認性に勝れた圧力計を提供することにある。
本発明の他の技術的課題は、目盛及び指針の角度変更作業を簡単且つ安全に行うことができる、取り扱いが簡単で作業性の良い圧力計を得ることにある。
【０００８】
【課題を解決するための手段】
上記課題を解決するため、本発明における第１の圧力計は、指針を有する内装機を収容したケースと、該ケースの前面に着脱自在に取り付けた上記指針の視認角度の変更のための目盛板兼用の前面カバーとに、相互に嵌合可能で嵌合角度を周方向に無段階に変更可能な円筒状の内側嵌合部及び外側嵌合部をそれぞれ形成し、両嵌合部の嵌合角度を変えることによって前面カバーにおける目盛の視認角度を上記指針の軸線の回りに無段階に変更可能とすると共に、上記指針の視認角度を変更可能としたことを特徴とするものである。
【０００９】
上記第１の圧力計において目盛及び指針の視認角度を変更するときは、該圧力計を流体圧機器に取り付けたまま、前面カバーのみをケースから取り外して指針の角度変更を行ったあと、該前面カバーを上記指針が目盛の零点を指す角度に取り付ければ良い。
この結果、圧力計の取付方式や取付角度等に関係なく、目盛及び指針の視認角度を見易い任意の角度に簡単且つ確実に変更することができる。また、変更作業に工具類を必要としないため、その作業が非常に簡単であり、しかも、圧力計を過って落すことがないため、衝撃による精度低下や破損等を来すこともなく、更に、圧力計を一旦取り外して再装着する必要ないため、シール剤やシール部材等を必要としないだけでなく、流体漏れなどを再チェックする必要もないなど、目盛板の角度変更作業を簡単且つ安全に行うことができるという利点がある。
【００１０】
本発明においては、上記ケースの嵌合部と前面カバーの嵌合部とを所望の嵌合角度に係止させるための係止手段を設けておくことが望ましい。
本発明の具体的な実施態様においては、上記指針が、上記指針軸に固定された円板と、該円板に角度変更可能に取り付けられた針部材とで構成されていて、該針部材の位置を変えることによって指針の視認角度を変更することができるようになっている。
【００１１】
また、本発明の第２の圧力計は、指針を有する内装機を収容したケースと、該ケースの前面に着脱自在に取り付けた上記指針の視認角度の変更のための目盛板兼用の前面カバーとに、相互に嵌合可能な円筒状の内側嵌合部及び外側嵌合部をそれぞれ形成すると共に相互に係合し合う凹凸をそれぞれ形成し、これらの凹凸の係合位置を変えることによって前面カバーにおける目盛の視認角度を段階的に変更可能とすると共に、上記指針の視認角度を変更可能としたことを特徴としている。
【００１２】
上記第２の圧力計においては、上記ケース及び前面カバーの凹凸がそれぞれ、上記指針軸の軸線の回りに環状に配設されている。
本発明において好ましくは、上記指針の視認角度を変更可能にする手段が、該指針と指針軸とに設けられた相互に係合可能で係合位置を変更可能な凹凸からなっていることである。具体的には、指針軸側の凹凸が、指針取付部の外周に環状に配設されて、指針側の凹凸が、上記指針取付部に嵌合する取付穴の内縁に環状に配設されている。
【００１３】
【発明の実施の形態】
図１乃至図３は本発明に係る圧力計の第１実施例を示すもので、この圧力計１０Ａは、流体圧力を指針軸１２の回転運動に変換する内装機１１と、該内装機１１の指針軸１２に取り付けられた指針１３と、上記内装機１１を収容するケース１４と、該ケース１４の前面に着脱自在に取り付けられた前面カバー１５とを備えている。
【００１４】
上記内装機１１は、流体圧力の導入により変形するブルドン管１７を有していて、該ブルドン管１７の変形を指針軸１２の回転運動に変換する構成のもので、ねじ止め等の適宜の取付手段によってケース１４内に取り付けられている。しかしながら内装機１１は、このようなブルドン管方式ものに限定されない。
【００１５】
上記指針１３は、上記指針軸１２に固定的に取り付けられた円板１３ａと、該円板１３ａの前面に視認角度を変更可能なるように取り付けられた針部材１３ｂとからなっている。
【００１６】
上記針部材１３ｂを円板１３ａに取り付ける手段としては、接着剤や永久磁石等を用いることができる。接着剤を用いる場合は、剥離性及び再接着性を有する接着剤を使用し、この接着剤を上記針部材１３ｂの裏面に直接塗布するか、又は粘着テープとして貼り付けるようにするのが望ましい。そしてこの場合には、上記円板１３ａ及び針部材１３ｂの材質に特に制限はなく、合成樹脂やゴムあるいは金属等の各種素材でそれらを形成することができる。
【００１７】
一方、針部材１３ｂの取付手段として永久磁石を用いる場合は、該永久磁石で針部材を形成するか、あるいは、合成樹脂やゴム又は金属等からなる針部材１３ｂの裏面に永久磁石を貼り付けるようにする。そしてこの場合には、円板１３ａを金属等の磁性材料を用いて形成することが必要である。
【００１８】
かくして円板１３ａに取り付けられた上記針部材１３ｂは、それを一旦取り外して向きを変えることにより、その視認角度を軸線Ｌの回りに３６０度無段階に変更することができる。
【００１９】
上記ケース１４は、合成樹脂又は金属等の素材によって円筒状に形成され、その前半部には前面カバー１５を取り付けるための嵌合部２０が設けられ、この嵌合部２０に前面カバー１５の嵌合部２１を嵌合させることにより、該前面カバー１５が着脱自在に取り付けられている。
【００２０】
上記前面カバー１５は、圧力目盛２２を付した目盛板を兼ねるもので、その具体的構成は次の通りである。即ち、該前面カバー１５は、中央部に円形の取付穴２５を有する不透明で円環状をした合成樹脂製の第１部材２３と、該第１部材２３の取付穴２５内に取り付けられた透明で円板形をした合成樹脂製の第２部材２４とからなっており、該第２部材２４の外周部分に上記目盛２２が付され、第１部材２３には、該目盛２２に対応する数値等の必要な文字が付されると共に、ケース１４の嵌合部２０に嵌合する上記嵌合部２１が形成されている。
【００２１】
上記第１部材２３と第２部材２４との間には、上記目盛２２に沿うように隙間２７が形成され、該隙間内に、流体の使用圧力範囲を表示する表示針２８が、目盛２２に沿って位置変更可能なるように取り付けられている。
【００２２】
上記ケース１４の嵌合部２０と前面カバー１５の嵌合部２１とは、相互の嵌合角度を円周方向に３６０度無段階に変更可能となっていて、その変更により前面カバー１５（従って目盛２２）の視認角度を、上記指針軸１２の軸線Ｌの回りに３６０度無段階に変更できるようになっている。
【００２３】
上記嵌合部２０，２１には、ケース１４と前面カバー１５とを所望の嵌合角度に固定するため、適宜の係止手段を設けておくことことが望ましい。この係止手段は、前面カバー１５を振動等によって不用意に動かないように固定できるものであればどのようなものでも良いが、例えば、両嵌合部２０，２１間の摩擦力を利用するものとか、一方の嵌合部に螺着されて締め込みにより先端が他方の嵌合部に係止する螺子とか、一方の嵌合部に形成された係止溝と他方の嵌合部に形成された係止突起とからなる係止手段等を好適に用いることができる。
【００２４】
上記構成を有する第１実施例の圧力計１０Ａにおいて、目盛２２及び指針１３の視認角度を変更するときは、該圧力計１０Ａを流体圧機器に取り付けたまま、前面カバー１５のみをケース１４から一旦取り外し、その状態で針部材１３ｂの向きを、目盛板を所望の向き（例えば上下方向）に向けたとき丁度目盛２２の０を指すような角度に変更したあと、上記前面カバー１５を、上記針部材１３ｂの指す位置に０目盛が来るような角度に取り付ける。
【００２５】
これにより、圧力計全体の角度を変えることなく、従って圧力計の取付方式や取付角度等に関係なく、上記目盛２２及び指針１３の視認角度を、最も読み取り易い任意の角度に簡単且つ確実に変更することができる。
また、上記変更作業を行う際に工具類を必要としないため、その作業が非常に簡単であり、しかも、圧力計を過って落すことがないため、衝撃による精度低下や破損等を来すこともなく、更に、圧力計を一旦取り外して再装着する必要ないため、シール剤やシール部材等を必要としないだけでなく、流体漏れなどを再チェックする必要もないなど、目盛板の角度変更作業を簡単且つ安全に行うことができる。
【００２６】
なお、図示した実施例では、ケース１４の筒壁の一部を嵌合部２０としているが、筒壁のほぼ全体を嵌合部とすることにより、該ケース１４全体が前面カバー１５の嵌合部２１内に納まるようにすることもできる。
また、ケース１４の嵌合部２０と前面カバー１５の嵌合部２１は、その何れを内側又は外側に位置させるようにしても良いが、ケース１４の嵌合部２０を内側とし、前面カバー１５の嵌合部２１を外側とするのが好ましい。
【００２７】
図４乃至図９は本発明の第２実施例を示すもので、この第２実施例の圧力計１０Ｂは、上記第１実施例の圧力計１０Ａが目盛及び指針の視認角度を無段階に変更できるようになっているのに対し、段階的に変更できるようになっている点において相違するのみで、その他の基本構成は第１実施例と実質的に同じである。従って、構成が同じ部分には第１実施例と同じ符合を付し、主要な相違点について以下に説明する。
【００２８】
即ち、この圧力計１０Ｂにおけるケース１４の先端部と、前面カバー１５の第２部材２３とには、図４及び図５から分かるように、相互に嵌合可能な円筒状の嵌合部３０，３１が、それぞれ指針軸１２の軸線Ｌを中心に形成されている。内側に嵌合するケース１４の嵌合部３０には、その外周面に係止溝３３が該嵌合部３０を取り囲むように形成され、外側に嵌合する前面カバー１５の嵌合部３１には、その先端部内側面に、上記係止溝３３に弾力的に係脱自在の係止突条３４が円周状に形成され、前面カバー１５を軸線Ｌ方向に前後動させてこれらの係止溝３３と係止突条３４とを係脱させることにより、該前面カバー１５をケース１４に対して着脱できるようにしている。
【００２９】
また、上記ケース１４側の嵌合部３０の先端には、その全周にわたってＶ字形をした凹凸３５ａ，３５ｂが円環状に交互に配設され、前面カバー１５の内面には、上記嵌合部３１より若干内側寄りの位置に、上記ケース１４先端の凹凸３５ａ，３５ｂと相互に係合し合うＶ字形の凹凸３６ａ，３６ｂが、円環状に交互に配設されている。
これらの凹凸３５ａ，３５ｂと３６ａ，３６ｂとは、前面カバー１５を取り外して回転させることにより相互の係合位置を３６０度変更することができるものであり、従ってその変更により、該前面カバー１５（従って目盛２２）の視認角度を、指針軸１２の軸線Ｌの回りに３６０度段階的に変更することができる。
上記凹凸３５ａ，３５ｂ及び３６ａ，３６ｂの形状は任意であって、例えば図６に示すような、Ｖ字形部分の両側に垂直部分とを備えたような形状の凹凸とすることもできる。
【００３０】
また、上記指針１３も、上記前面カバー１５と同様に、凹凸同士の係合によって視認角度を変更できるようになっている。
即ち、図７乃至図９に示すように、指針軸１２の先端には指針取付部１２ａが固定されていて、この指針取付部１２ａの基端部外周に、Ｖ字形の凹凸４０ａ，４０ｂが該指針取付部１２ａを取り囲むように交互に環状に配設されると共に、指針取付部１２ａの先端部外周に、先端側の溝壁４２ａが外広がり状に傾斜する係止溝４２が、該指針取付部１２ａを取り囲むように形成されている。
【００３１】
これに対して指針１３Ｂには、上記指針取付部１２ａに嵌合する取付穴４４ａを備えた筒状の嵌合部４４が形成され、該嵌合部４４における取付穴４４ａの穴縁には、その基端部側に上記凹凸４０ａ，４０ｂと係合し合うＶ字形の凹凸４１ａ，４１ｂが環状に配設されると共に、取付穴４４ａの先端部側に、上記指針取付部１２ａの係止溝４２に弾力的に係脱可能な係止突条４３が環状に形成されている。
【００３２】
従って、図７の状態から指針１３を軸線Ｌに沿って外側（図の左側）に動かすと、図８に示すように該指針１３は、係止突条４３が係止溝４２から外れると共に、凹凸同士の係合が解除された状態となって、その視認角度を変更することができる。そして、視認角度変更後に指針１３を内側（図８において右側）に動かすと、該指針１３は、係止突条４３が係止溝４２に係止すると共に凹凸同士が相互に係合する図７の位置を占める。
【００３３】
図中４５は、上記嵌合部の外周に設けられた突縁で、一定間隔で縦溝４５ａが切られており、指針１３を動かす際に指を掛けるためのものである。
【００３４】
この第２実施例の圧力計１０Ｂにおいては、前面カバー１５をケース１４から取り外し、指針１３Ｂの視認角度を上述した方法で変更したあと、該前面カバー１５を目盛２２が指針１３Ｂに応じた向きになるように角度変更してケース１４に取り付けることにより、目盛２２及び指針１３Ｂの視認角度を変更することができる。この場合の視認角度の変更は、上記凹凸３５ａ，３５ｂと３６ａ，３６ｂ及び４０ａ，４０ｂと４１ａ，４１ｂの数に応じて段階的に行われるもので、この点においては無段階の変更を可能とした上記第１実施例と相違するが、それ以外の作用効果については実質的に第１実施例と同じである。
【００３５】
【発明の効果】
このように本発明の圧力計によれば、前面カバーを目盛板として共用し、指針と共にその向きを変えられるようにしたことにより、流体圧機器への取付方式や取付角度等に関係なく、目盛及び指針を見易い視認角度に簡単且つ確実に変更することが可能となり、視認性に勝れる。
また、上記変更作業を行う際に工具類を必要としないため、その作業が非常に簡単であり、しかも、圧力計を過って落すことがないため、衝撃による精度低下や破損等を来すこともなく、更に、圧力計を一旦取り外して再装着する必要ないため、シール剤やシール部材等を必要としないだけでなく、流体漏れなどを再チェックする必要もないなど、目盛及び指針の視認角度の変更作業を簡単且つ安全に行うことができる。
【図面の簡単な説明】
【図１】本発明に係る圧力計の第１実施例を示す分解斜視図である。
【図２】図１の圧力計の組立状態での正面図である。
【図３】図２の断面図である。
【図４】本発明に係る圧力計の第２実施例を示す断面図である。
【図５】図４の要部を分解して示す拡大図である。
【図６】凹凸の他例を示す要部側面図である。
【図７】指針の拡大断面図である。
【図８】指針の取り外し状態の断面図である。
【図９】指針の背面図である。
【図１０】従来の圧力計の一例を示す斜視図である。
【図１１】従来の圧力計の他例を示す斜視図である。
【図１２】Ａ，Ｂは、従来の圧力計の異なる使用状態を示す正面図である。
【符号の説明】
１０Ａ，１０Ｂ圧力計１１内装機
１２指針軸１２ａ指針取付部
１３，１３Ｂ指針１３ａ円板
１３ｂ針部材１４ケース
１５前面カバー２０，２１嵌合部
２２目盛
３５ａ，３５ｂ，３６ａ，３６ｂ凹凸
４０ａ，４０ｂ，４１ａ，４１ｂ凹凸
４４ａ取付穴Ｌ軸線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressure gauge capable of changing the visual angle of the scale and the pointer, and more specifically, the visibility can be changed to an angle at which the scale and the pointer can be easily viewed regardless of the use angle of the pressure gauge. It relates to a superior pressure gauge.
[0002]
[Prior art]
Generally, a pressure gauge for measuring a working fluid pressure is attached to a fluid pressure device such as a pressure regulating valve. When such a pressure gauge is roughly classified according to the mounting method, for example, as in the pressure gauge 1A shown in FIG. 10, a mounting shaft 2 serving as an air conduit having a taper screw or a parallel screw cut on the outer periphery is provided in the fluid pressure device. There are a type that is screwed into a screw hole, a type that is fixed to a fluid pressure device with mounting screws 4 provided at a plurality of locations of the case 3, such as a pressure gauge 1B shown in FIG.
[0003]
When the pressure gauge 1A or 1B is attached to a fluid pressure device, as shown in FIG. 12A or B as a representative of the pressure gauge 1A, the pressure gauge 1A may be turned sideways or vertically depending on the use angle of the fluid pressure device 6. In such a case, the scale is very difficult to read. Therefore, the viewing angle of the pressure gauge 1A is normally changed so that the scale is directed in the vertical direction.
[0004]
However, in the pressure gauge 1A as shown in FIG. 10, when the screw cut in the mounting shaft 2 is a taper screw, the viewing angle must be changed depending on the screwing torque or screwing position of the mounting shaft 2, In addition, when the screw cut on the mounting shaft 2 is a parallel screw, the viewing angle must be changed depending on the thickness of the packing and the amount of crushing of the packing. In either case, the changing operation is very troublesome. In many cases, the angle cannot be changed to an appropriate angle.
[0005]
On the other hand, in the pressure gauge 1B as shown in FIG. 11, the viewing angle can be changed only to the angle corresponding to the number of the mounting screws 4, so that the pressure gauge 1B is changed to the working angle of the fluid pressure device 6. The probability of changing to the appropriate orientation is very low.
[0006]
In addition, in any of the above-mentioned pressure gauges, it is necessary to use tools for changing the angle, or it must be removed from the fluid pressure device. There are many problems such as being easy, and requiring a sealant or a seal member at the time of re-mounting, and it is necessary to strictly confirm that there is no fluid leakage, and the work is troublesome.
[0007]
[Problems to be solved by the invention]
The main technical problem of the present invention is that the scale and the pointer can be easily and reliably changed to the most easily readable viewing angle regardless of the mounting method and the mounting angle to the fluid pressure device, and the visibility is excellent. Is to provide a pressure gauge.
Another technical problem of the present invention is to obtain a pressure gauge that can be easily and safely changed in the scale and the angle of the pointer and is easy to handle and good in workability.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, a first pressure gauge according to the present invention includes a case housing an interior machine having a pointer, and a scale plate for changing the viewing angle of the pointer detachably attached to the front surface of the case. Cylindrical inner fitting part and outer fitting part that can be fitted to each other and the fitting angle can be changed steplessly in the circumferential direction are formed on the dual-purpose front cover. By changing the angle, the visual angle of the scale on the front cover can be changed steplessly around the axis of the pointer, and the visual angle of the pointer can be changed.
[0009]
When changing the viewing angle of the scale and the pointer in the first pressure gauge, after changing the pointer angle by removing only the front cover from the case with the pressure gauge attached to the fluid pressure device, The cover may be attached at an angle at which the pointer points to the zero point of the scale.
As a result, regardless of the pressure gauge mounting method, mounting angle, or the like, the scale and the pointer viewing angle can be easily and reliably changed to any desired angle. Also, since no tools are required for the change work, the work is very simple, and since the pressure gauge is not dropped excessively, there is no loss of accuracy or damage due to impact, Furthermore, since it is not necessary to remove and reattach the pressure gauge, it is not necessary to re-check for leaks, etc. There is an advantage that it can be performed safely.
[0010]
In the present invention, it is desirable to provide a locking means for locking the fitting portion of the case and the fitting portion of the front cover at a desired fitting angle.
In a specific embodiment of the present invention, the pointer is composed of a disc fixed to the pointer shaft and a needle member attached to the disc so that the angle can be changed. The viewing angle of the pointer can be changed by changing the position.
[0011]
The second pressure gauge of the present invention includes a case containing an interior unit having a pointer, a front cover serving as a scale plate for changing the visual angle of the pointer removably attached to the front surface of the case, In addition, a cylindrical inner fitting portion and an outer fitting portion that can be fitted to each other are formed, and irregularities that are engaged with each other are formed, and the engagement position of these irregularities is changed to change the front cover. The visual angle of the scale can be changed in stages, and the visual angle of the pointer can be changed.
[0012]
In the second pressure gauge, the projections and depressions of the case and the front cover are each annularly arranged around the axis of the pointer shaft.
Preferably, in the present invention, the means for changing the viewing angle of the pointer is composed of concavities and convexities provided on the pointer and the pointer shaft that can engage with each other and change the engagement position. . Specifically, the unevenness on the pointer shaft side is annularly disposed on the outer periphery of the pointer mounting portion, and the unevenness on the pointer side is annularly disposed on the inner edge of the mounting hole that fits the pointer mounting portion. Yes.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show a first embodiment of a pressure gauge according to the present invention. This pressure gauge 10A includes an interior unit 11 that converts fluid pressure into rotational movement of a pointer shaft 12, and A pointer 13 attached to the pointer shaft 12, a case 14 for housing the interior unit 11, and a front cover 15 detachably attached to the front surface of the case 14 are provided.
[0014]
The interior machine 11 has a Bourdon tube 17 that is deformed by the introduction of fluid pressure, and is configured to convert the deformation of the Bourdon tube 17 into a rotational movement of the pointer shaft 12. It is attached in the case 14 by means. However, the interior unit 11 is not limited to such a Bourdon tube type.
[0015]
The pointer 13 includes a disc 13a fixedly attached to the pointer shaft 12, and a needle member 13b attached to the front surface of the disc 13a so that the viewing angle can be changed.
[0016]
As a means for attaching the needle member 13b to the disk 13a, an adhesive, a permanent magnet, or the like can be used. When using an adhesive, it is desirable to use an adhesive having peelability and re-adhesion, and apply this adhesive directly to the back surface of the needle member 13b or attach it as an adhesive tape. In this case, the material of the disk 13a and the needle member 13b is not particularly limited, and they can be formed of various materials such as synthetic resin, rubber, or metal.
[0017]
On the other hand, when a permanent magnet is used as the attachment means for the needle member 13b, the needle member is formed with the permanent magnet, or the permanent magnet is attached to the back surface of the needle member 13b made of synthetic resin, rubber, metal, or the like. To. In this case, it is necessary to form the disk 13a using a magnetic material such as metal.
[0018]
Thus, the needle member 13b attached to the disc 13a can be changed 360 degrees steplessly around the axis L by removing it once and changing the direction.
[0019]
The case 14 is formed in a cylindrical shape by a material such as synthetic resin or metal, and a fitting portion 20 for attaching the front cover 15 is provided in the front half portion thereof. The front cover 15 is detachably attached by fitting the joint portion 21.
[0020]
The front cover 15 also serves as a scale plate with a pressure scale 22, and its specific configuration is as follows. That is, the front cover 15 is a transparent first member 23 made of an opaque and circular synthetic resin having a circular attachment hole 25 in the center, and a transparent member attached in the attachment hole 25 of the first member 23. The second member 24 made of a synthetic resin having a disk shape is provided with the scale 22 on the outer peripheral portion of the second member 24. The first member 23 has numerical values corresponding to the scale 22 and the like. The above-mentioned fitting portion 21 that is fitted to the fitting portion 20 of the case 14 is formed.
[0021]
A gap 27 is formed between the first member 23 and the second member 24 along the scale 22, and a display needle 28 for indicating the working pressure range of the fluid is formed on the scale 22 in the gap. It is attached so that the position can be changed along.
[0022]
The fitting part 20 of the case 14 and the fitting part 21 of the front cover 15 can change the mutual fitting angle in a stepless manner by 360 degrees in the circumferential direction. The visual recognition angle of the scale 22) can be changed steplessly by 360 degrees around the axis L of the pointer shaft 12.
[0023]
In order to fix the case 14 and the front cover 15 to a desired fitting angle, it is desirable that appropriate fitting means is provided in the fitting portions 20 and 21. This locking means may be any means as long as it can fix the front cover 15 so as not to move carelessly by vibration or the like. For example, a frictional force between the fitting portions 20 and 21 is used. Or a screw that is screwed into one fitting part and tightened to the other fitting part by tightening, or formed in a locking groove formed in one fitting part and the other fitting part A locking means or the like including the locking protrusions can be suitably used.
[0024]
In the pressure gauge 10A of the first embodiment having the above-described configuration, when changing the viewing angle of the scale 22 and the pointer 13, only the front cover 15 is temporarily removed from the case 14 while the pressure gauge 10A is attached to the fluid pressure device. After removing the needle member 13b and changing the direction of the needle member 13b to an angle that points to 0 of the scale 22 when the scale plate is directed in a desired direction (for example, the vertical direction), the front cover 15 is moved to the needle. It is attached at an angle such that the zero scale is at the position indicated by the member 13b.
[0025]
As a result, the visual angle of the scale 22 and the pointer 13 can be easily and reliably changed to any angle that can be read most easily without changing the angle of the entire pressure gauge, and therefore regardless of the pressure gauge mounting method and angle. can do.
In addition, since no tools are required when performing the above change work, the work is very simple, and the pressure gauge is not dropped excessively, resulting in a decrease in accuracy or damage due to impact. In addition, since there is no need to remove and re-insert the pressure gauge, not only the sealant or seal member is required, but also there is no need to recheck for fluid leakage, etc. Work can be done easily and safely.
[0026]
In the illustrated embodiment, a part of the cylindrical wall of the case 14 is used as the fitting portion 20, but the entire case 14 is fitted into the front cover 15 by using almost the entire cylindrical wall as the fitting portion. It can also be accommodated in the part 21.
Further, the fitting portion 21 of the fitting portion 20 and the front cover 15 of the case 14, the both may be a so as to be positioned inside or outside, but the fitting portion 20 of the case 14 and the inside front cover 15 It is preferable that the fitting portion 21 is the outside.
[0027]
FIGS. 4 to 9 show a second embodiment of the present invention. The pressure gauge 10B of the second embodiment is such that the pressure gauge 10A of the first embodiment changes the visual angle of the scale and pointer steplessly. The other basic configuration is substantially the same as that of the first embodiment, except that the basic configuration is different from the first embodiment. Accordingly, the same reference numerals as those in the first embodiment are given to parts having the same configuration, and main differences will be described below.
[0028]
That is, as can be understood from FIGS. 4 and 5, the cylindrical fitting portion 30, which can be fitted to each other, can be seen from the distal end portion of the case 14 in the pressure gauge 10 </ b> B and the second member 23 of the front cover 15. 31 are formed around the axis L of the pointer shaft 12, respectively. A locking groove 33 is formed on the outer peripheral surface of the fitting portion 30 of the case 14 fitted inside so as to surround the fitting portion 30, and the fitting portion 31 of the front cover 15 fitted outside is formed on the fitting portion 30. Is formed on the inner surface of the tip thereof in a circumferential manner with a locking protrusion 34 that can be elastically engaged and disengaged in the locking groove 33, and the front cover 15 is moved back and forth in the direction of the axis L so as to be locked. The front cover 15 can be attached to and detached from the case 14 by engaging and disengaging the groove 33 and the locking protrusion 34.
[0029]
Further, V-shaped irregularities 35a and 35b are alternately arranged in an annular shape at the front end of the fitting portion 30 on the case 14 side, and the fitting portion 30 is provided on the inner surface of the front cover 15. V-shaped irregularities 36 a and 36 b that are mutually engaged with the irregularities 35 a and 35 b at the tip of the case 14 are alternately arranged in an annular shape at a position slightly inward from 31.
These irregularities 35a, 35b and 36a, 36b can change the engagement position of the front cover 15 (360 degrees) by removing the front cover 15 and rotating it. Accordingly, the viewing angle of the scale 22) can be changed in 360 degrees around the axis L of the pointer shaft 12.
The shapes of the irregularities 35a, 35b and 36a, 36b are arbitrary. For example, as shown in FIG. 6, irregularities having a shape having a vertical portion on both sides of a V-shaped portion can be used.
[0030]
In addition, as with the front cover 15, the pointer 13 can change the viewing angle by the engagement of the projections and depressions.
That is, as shown in FIGS. 7 to 9, a pointer mounting portion 12a is fixed to the tip of the pointer shaft 12, and V-shaped irregularities 40a and 40b are formed on the outer periphery of the base end portion of the pointer mounting portion 12a. Locking grooves 42 that are alternately arranged in an annular shape so as to surround the pointer attaching portion 12a and that have a groove wall 42a on the distal end side inclined outwardly are provided on the outer periphery of the distal end portion of the pointer attaching portion 12a. It is formed so as to surround the portion 12a.
[0031]
On the other hand, the pointer 13B is formed with a cylindrical fitting portion 44 having a mounting hole 44a that fits into the pointer mounting portion 12a, and the hole edge of the mounting hole 44a in the fitting portion 44 has V-shaped irregularities 41a and 41b that engage with the irregularities 40a and 40b are annularly arranged on the base end side, and the locking groove of the pointer mounting portion 12a is formed on the distal end side of the mounting hole 44a. A locking protrusion 43 that can be elastically engaged and disengaged is formed on the ring 42.
[0032]
Accordingly, when the pointer 13 is moved outward (on the left side in the drawing) along the axis L from the state of FIG. 7, the pointer 13 is disengaged from the locking groove 42 as shown in FIG. The engagement angle between the projections and depressions is released, and the viewing angle can be changed. When the pointer 13 is moved inward (right side in FIG. 8) after the viewing angle is changed, the pointer 13 is engaged with the engaging protrusions 43 and the protrusions and recesses 43 are engaged with each other. Occupy position.
[0033]
In the figure, reference numeral 45 denotes a projecting edge provided on the outer periphery of the fitting portion, and vertical grooves 45a are cut at regular intervals, and is used for hooking a finger when the pointer 13 is moved.
[0034]
In the pressure gauge 10B of the second embodiment, the front cover 15 is removed from the case 14, the viewing angle of the pointer 13B is changed by the method described above, and then the front cover 15 is placed in a direction according to the pointer 13B. By changing the angle so as to be attached to the case 14, the visual recognition angle of the scale 22 and the pointer 13 </ b> B can be changed. In this case, the viewing angle is changed stepwise according to the number of the concaves and convexes 35a, 35b and 36a, 36b and 40a, 40b and 41a, 41b. In this respect, stepless change is possible. Although different from the first embodiment described above, the other operational effects are substantially the same as those of the first embodiment.
[0035]
【The invention's effect】
As described above, according to the pressure gauge of the present invention, the front cover is shared as a scale plate, and its direction can be changed together with the pointer, so that the scale can be used regardless of the mounting method or mounting angle to the fluid pressure device. In addition, it is possible to easily and surely change the viewing angle so that the pointer is easy to see, and the visibility is excellent.
In addition, since no tools are required when performing the above change work, the work is very simple, and the pressure gauge is not dropped excessively, resulting in a decrease in accuracy or damage due to impact. In addition, since it is not necessary to remove and reattach the pressure gauge, it is not necessary to re-check for fluid leaks, etc. It is possible to easily and safely change the angle.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a first embodiment of a pressure gauge according to the present invention.
FIG. 2 is a front view of the pressure gauge of FIG. 1 in an assembled state.
FIG. 3 is a cross-sectional view of FIG.
FIG. 4 is a cross-sectional view showing a second embodiment of a pressure gauge according to the present invention.
FIG. 5 is an enlarged view showing an essential part of FIG. 4 in an exploded manner.
FIG. 6 is a side view of an essential part showing another example of unevenness.
FIG. 7 is an enlarged cross-sectional view of a pointer.
FIG. 8 is a cross-sectional view of a state in which a pointer is removed.
FIG. 9 is a rear view of the pointer.
FIG. 10 is a perspective view showing an example of a conventional pressure gauge.
FIG. 11 is a perspective view showing another example of a conventional pressure gauge.
FIGS. 12A and 12B are front views showing different usage states of a conventional pressure gauge. FIGS.
[Explanation of symbols]
10A, 10B Pressure gauge 11 Interior machine 12 Pointer shaft 12a Pointer mounting portion 13, 13B Pointer 13a Disc 13b Needle member 14 Case 15 Front cover 20, 21 Fitting portion 22 Scales 35a, 35b, 36a, 36b Unevenness 40a, 40b, 41a, 41b Unevenness 44a Mounting hole L Axis

Claims

And an interior that converts the fluid pressure into rotational motion of the pointer shaft, a pointer attached to the pointer shaft of the interior machine, case and, above guidelines detachably attached to the front of the case for housing the interior machine And a front cover that also serves as a scale plate for changing the viewing angle of
The case and the front cover are respectively formed with a cylindrical inner fitting portion and an outer fitting portion that can be fitted to each other and the fitting angle can be changed stepwise in the circumferential direction. By changing the alignment angle, the visual angle of the scale on the front cover can be changed steplessly around the axis of the pointer shaft, and the visual angle of the pointer can be changed,
The pressure gauge which can change the visual angle of the scale and the pointer characterized by this.

The pressure gauge according to claim 1, further comprising a locking means for locking the fitting portion between the case and the front cover at a desired fitting angle.

3. The pressure gauge according to claim 1, wherein the pointer includes a disk fixed to the pointer shaft and a needle member attached to the disk so that a viewing angle can be changed.

And an interior that converts the fluid pressure into rotational motion of the pointer shaft, a pointer attached to the pointer shaft of the interior machine, case and, above guidelines detachably attached to the front of the case for housing the interior machine And a front cover that also serves as a scale plate for changing the viewing angle of
In the case and the front cover, a cylindrical inner fitting portion and an outer fitting portion that can be fitted to each other are formed, and irregularities that can be engaged with each other and change the engagement position are formed, respectively. By changing the engagement position of these irregularities, the visual angle of the scale on the front cover can be changed stepwise around the axis of the pointer shaft, and the visual angle of the pointer can be changed,
The pressure gauge which can change the visual angle of the scale and the pointer characterized by this.

5. The pressure gauge according to claim 4, wherein the irregularities of the case and the front cover are respectively arranged in an annular shape around the axis of the pointer shaft.

The pressure gauge according to claim 4 or 5, wherein the means for changing the viewing angle of the pointer is an unevenness provided on the pointer and the pointer shaft and capable of engaging with each other and changing the engagement position. some stuff.

7. The pressure gauge according to claim 6, wherein the irregularities in the pointer and the pointer shaft are annularly arranged on the outer periphery of the pointer mounting portion on the pointer shaft side, and are fitted to the pointer mounting portion on the pointer side. Those that are annularly arranged on the inner edge of the hole.