JP2007033340A - Measuring instrument and manufacturing method thereof - Google Patents

Measuring instrument and manufacturing method thereof Download PDF

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JP2007033340A
JP2007033340A JP2005219607A JP2005219607A JP2007033340A JP 2007033340 A JP2007033340 A JP 2007033340A JP 2005219607 A JP2005219607 A JP 2005219607A JP 2005219607 A JP2005219607 A JP 2005219607A JP 2007033340 A JP2007033340 A JP 2007033340A
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scale plate
substrate
pointer
cover
joint
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JP4523508B2 (en
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Hiroyuki Kaneko
紘之 金子
Masaki Yanagisawa
正樹 柳沢
Tetsuyasu Yamada
哲靖 山田
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Nagano Keiki Co Ltd
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Nagano Keiki Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure gauge capable of easily positioning a pointer at a top end of a Bourdon tube at a zero point on a scale plate even if the front of the gauge is a non-circular form. <P>SOLUTION: The measuring instrument includes: a substrate fixed to a joint; a swirl type Bourdon tube 3 in which a root section 31 is fixed to the joint and the pointer 6 is attached to the top end; a scale plate 4 mounted to the substrate; and a cover 5 that is integrally formed with a rising portion 51, in which the outer sections of the scale plate 4 and the substrate are engaged, and a cover body 52 that covers the front of the scale plate 4. In the outer sections of the scale plate 4 and the substrate, respective circular sections 4A, 51A having almost the same diameter as that of the circular section of the substrate and notching sections 4B, 51B are continuously formed. The substrate is positioned by rotating around the root section 31 of the Bourdon tube 3 to the scale plate 4 in the rising portion of the cover 5. The rotation can be easily operated with watching the scale plate 4 and the pointer 6 from the front of the cover 51. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ブルドン管式圧力計、その他の測定器及びこの測定器を製造する方法に関する。   The present invention relates to a Bourdon tube pressure gauge, other measuring devices, and a method for manufacturing the measuring devices.

圧力計、その他の測定器としてブルドン管を利用したものがある。このブルドン管を利用した測定器には、円板状の基板を継ぎ手に固定し、この継ぎ手にブルドン管の基端部を固定するとともに、このブルドン管の先端部に指針を取り付け、継ぎ手に形成された圧力導入孔から導入された圧力により指針が回動するタイプの圧力計がある。
このタイプの圧力計では、指針で指される目盛が形成された目盛板を基板の正面に取り付け、この目盛板と基板とを目盛板の正面をカバーで覆う構造であり、従来には、これらのカバー、目盛板及び基板の正面形状がそれぞれ円形に形成されているものがある(例えば、従来例１；特許文献１)。 Some pressure gauges and other measuring instruments use Bourdon tubes. In a measuring instrument using this Bourdon tube, a disk-shaped substrate is fixed to the joint, and the base end of the Bourdon tube is fixed to the joint, and a pointer is attached to the distal end of the Bourdon tube to form the joint. There is a pressure gauge of a type in which the pointer is rotated by the pressure introduced from the pressure introduction hole.
This type of pressure gauge has a structure in which a scale plate on which a scale pointed by a pointer is formed is attached to the front surface of the substrate, and the scale plate and the substrate are covered with a cover on the front surface of the scale plate. In some cases, the front shape of the cover, the scale plate, and the substrate is formed in a circular shape (for example, Conventional Example 1; Patent Document 1).

圧力計では、圧力がかかっていないブルドン管の先端部に設けられた指針が目盛板のゼロ位置を表示するためのゼロ点設定をしなければならないが、そのゼロ点設定のため、特許文献１等で示される正面円形の圧力計では、継ぎ手から試験的に所定の圧力を導入してブルドン管に取り付けられた指針を所定角度回動させ、その後、ブルドン管から圧力を排出して指針をゼロ点位置まで戻し、その指針の位置に目盛板のゼロ位置を合わせるように目盛板を回動させる。
最近では、圧力計においてもデザインの多様化が求められており、従来、基板、目盛板及びカバーの外周部が円板に直線状の切欠を形成した非円形形状の圧力計が知られている（従来例２）。このタイプの圧力計には、カバーは基板及び目盛板の外周部に嵌合される立上部が目盛板の正面を覆うカバー本体と一体に形成された構造のものがある。 In the pressure gauge, the pointer provided at the tip of the Bourdon tube where no pressure is applied must set the zero point for displaying the zero position of the scale plate. In the front circular pressure gauge indicated by the above, a predetermined pressure is experimentally introduced from the joint, the pointer attached to the Bourdon tube is rotated by a predetermined angle, and then the pressure is discharged from the Bourdon tube to zero the pointer. Return to the point position, and rotate the scale plate so that the zero position of the scale plate is aligned with the position of the pointer.
Recently, diversification of design has been demanded for pressure gauges, and conventionally, non-circular pressure gauges are known in which the outer periphery of the substrate, scale plate and cover has a circular notch formed in a circular plate. (Conventional example 2). In this type of pressure gauge, there is a cover having a structure in which an upright portion fitted to the outer periphery of the substrate and the scale plate is formed integrally with a cover body that covers the front surface of the scale plate.

特開２００１−９９７３３号公報JP 2001-99733 A

従来例２では、カバーは基板及び目盛板の外周部に嵌合される立上部が目盛板の正面を覆うカバー本体と一体に形成された構造であるため、ゼロ点設定をするために目盛板を基板に対して回動させると、目盛板と基板との直線状の切欠部同士が一致しないこともあり、カバーを嵌合させることができない。
そのため、正面が非円形形状の圧力計では、ゼロ点設定のため、作業者は、目盛板のゼロ位置に指針が一致するようにブルドン管の継ぎ手への取付角度を調整したり、ブルドン管への指針の取付位置を調整したりする必要がある。これらの作業は複雑であって熟練を要するという課題がある。 In Conventional Example 2, the cover has a structure in which an upright portion fitted to the outer peripheral portion of the substrate and the scale plate is formed integrally with the cover body covering the front surface of the scale plate, so that the scale plate is used for setting the zero point. Is rotated with respect to the substrate, the linear cutout portions of the scale plate and the substrate may not coincide with each other, and the cover cannot be fitted.
Therefore, in the case of a pressure gauge with a non-circular front, the operator can adjust the mounting angle to the Bourdon tube joint so that the pointer is aligned with the zero position of the scale plate, or to the Bourdon tube. It is necessary to adjust the mounting position of the pointer. These tasks are complicated and require skill.

本発明の目的は、正面が非円形形状であってもブルドン管の先端部に取り付けられた指針を簡単に目盛板のゼロ点に位置決めすることができる測定器及びその製造方法を提供することである。   An object of the present invention is to provide a measuring instrument that can easily position the pointer attached to the tip of the Bourdon tube at the zero point of the scale plate even when the front surface is non-circular, and a method for manufacturing the measuring instrument. is there.

本発明の測定器は、圧力導入孔が形成された継ぎ手と、この継ぎ手に固定され外周部に円弧状部を有する基板と、前記継ぎ手に基端部が固定されるとともに先端部に指針が取り付けられ前記圧力導入孔から導入された圧力により前記先端部が回動するブルドン管と、前記基板に取り付けられ前記指針で指される目盛が正面に形成された目盛板と、この目盛板と前記基板との外周部が嵌合される立上部と前記目盛板の正面を覆うカバー本体とが一体に形成されたカバーとを備え、前記目盛板と前記カバーの立上部との外周部にそれぞれ前記基板の円弧状部と略同じ径を有する円弧状部と切欠部とが連続形成された測定器であって、前記基板は前記カバーの立上部内で前記目盛板に対して前記ブルドン管の基端部を回動中心として回動して位置決めされることを特徴とする。   The measuring instrument according to the present invention includes a joint having a pressure introduction hole, a substrate fixed to the joint and having an arcuate portion on the outer periphery, a base end fixed to the joint, and a pointer attached to the tip. A Bourdon tube whose tip is rotated by the pressure introduced from the pressure introduction hole, a scale plate attached to the substrate and pointed by the pointer and formed on the front surface, and the scale plate and the substrate And a cover integrally formed with a cover main body that covers the front surface of the scale plate, and the substrate is respectively provided on the outer periphery of the scale plate and the upright portion of the cover. A measuring instrument in which an arcuate portion having substantially the same diameter as the arcuate portion and a cutout portion are continuously formed, and the base plate is a base end of the Bourdon tube with respect to the scale plate within an upright portion of the cover Rotating around the center of rotation and positioning Is the fact characterized.

本発明の測定器の製造方法は、圧力導入孔が形成された継ぎ手と、この継ぎ手に固定され外周部に円弧状部を有する基板と、前記継ぎ手に基端部が固定されるとともに先端部に指針が取り付けられ前記圧力導入孔から導入された圧力により前記先端部が回動するブルドン管と、前記基板に取り付けられ前記指針で指される目盛が正面に形成された目盛板と、この目盛板と前記基板との外周部が嵌合され前記目盛板の正面を覆うカバーとを備え、前記目盛板と前記カバーとの外周部に、それぞれ前記基板の円弧状部と略同じ径を有する円弧状部と切欠部とが連続形成された測定器を製造する方法であって、前記基板に前記継ぎ手を固定し、この継ぎ手に前記ブルドン管の基端部を取り付けるとともに前記ブルドン管の先端部に前記指針を取り付け、前記目盛板を、予め形成された窓に前記指針及び前記ブルドン管を挿通するとともに、裏面を前記基板に重ね合わせ、前記基板と前記目盛板とを前記カバーに嵌合する仮組工程と、前記継ぎ手から試験的に所定の圧力を導入して前記ブルドン管に取り付けられた前記指針を回動させた後に前記ブルドン管から圧力を排出して前記指針が静止した位置をゼロ点とするゼロ点設定工程と、前記ゼロ点設定工程で前記指針が前記目盛板に形成されたゼロ点位置と合うように前記基板を前記目盛板の平面内であって前記目盛板に対して前記ブルドン管の基端部を回動中心として回動して位置決めする位置決め工程と、この位置決め工程で位置決めされた前記基板と前記目盛板とを固定する基板固定工程とを備えたことを特徴とする。   The measuring device manufacturing method of the present invention includes a joint in which a pressure introduction hole is formed, a substrate fixed to the joint and having an arcuate portion on the outer periphery, a base end portion fixed to the joint, and a distal end portion. A Bourdon tube in which the tip is rotated by pressure introduced from the pressure introduction hole with the pointer attached, a scale plate formed on the front surface with a scale attached to the substrate and pointed by the pointer, and the scale plate And a cover that fits the outer periphery of the scale plate and covers the front surface of the scale plate, and the outer peripheral portions of the scale plate and the cover each have an arc shape having substantially the same diameter as the arc-shaped portion of the substrate. A method of manufacturing a measuring instrument in which a portion and a notch are continuously formed, wherein the joint is fixed to the substrate, a base end portion of the Bourdon tube is attached to the joint, and the distal end portion of the Bourdon tube is Install the guidelines The scale plate is inserted through the pointer and the Bourdon tube into a pre-formed window, the back surface is overlaid on the substrate, and the temporary assembly step of fitting the substrate and the scale plate to the cover; A zero point where a zero point is a position where the pointer rests after the pressure attached to the Bourdon tube is rotated by introducing a predetermined pressure from the joint and then the pointer attached to the Bourdon tube is rotated. And the base of the Bourdon tube with respect to the scale plate in the plane of the scale plate so that the pointer matches the zero point position formed on the scale plate in the setting step and the zero point setting step. A positioning step of rotating and positioning with the end portion as a rotation center, and a substrate fixing step of fixing the substrate positioned in the positioning step and the scale plate are provided.

以上の構成の発明では、指針の位置決めをするにあたり、継ぎ手から試験的に導入した圧力を排出して指針が静止した状態で、基板を目盛板及びカバーに対して回動させる。すると、継ぎ手に固定されたブルドン管自体が基端部を回動中心として回動し、このブルドン管の回動によって、その先端部に固定された指針と目盛板とが相対的に回動する。
この回動操作をカバーの正面から目盛板と指針とを見ながら、指針と目盛板のゼロ点とが一致するまで行う。この状態で、目盛板、基板及びカバーの立上部を接着剤等を用いて適宜固定する。
従って、本発明では、基板を通じて指針を目盛板に対して移動させるという簡単な方法で指針と目盛板との位置決めが行える。そのため、作業員の感や熟練度に影響されることなく、正面が非円形形状の測定器においてゼロ点位置を調整する作業を容易に行うことができる。 In the invention with the above configuration, when positioning the pointer, the substrate is rotated with respect to the scale plate and the cover in a state where the pressure introduced by the test from the joint is discharged and the pointer is stationary. Then, the Bourdon tube itself fixed to the joint rotates about the base end portion as a rotation center, and the pointer fixed to the distal end portion and the scale plate relatively rotate by the rotation of the Bourdon tube. .
This rotation operation is performed while looking at the scale plate and the pointer from the front of the cover until the zero point of the pointer matches the scale plate. In this state, the scale plate, the substrate, and the upper portion of the cover are appropriately fixed using an adhesive or the like.
Accordingly, in the present invention, the pointer and the scale plate can be positioned by a simple method of moving the pointer with respect to the scale plate through the substrate. Therefore, the work of adjusting the zero point position can be easily performed in a measuring device having a non-circular shape on the front surface without being affected by the operator's feeling and skill level.

ここで、本発明では、測定器の発明において、前記目盛板と前記カバーの立上部との切欠部は、それぞれ前記円弧状部の両端部をつなぐ直線部とされ、前記基板の外周部は前記カバーの立上部と対向する２つの直線部を備えた略扇形状とされる構成が好ましい。   Here, in the invention of the measuring instrument according to the present invention, the cutout portions of the scale plate and the upright portion of the cover are respectively straight portions connecting both ends of the arc-shaped portion, and the outer peripheral portion of the substrate is the A configuration having a substantially fan shape provided with two straight portions facing the upright portion of the cover is preferable.

この構成の発明では、基板の外周部の一部を構成する２つの直線部がカバーの立上部の直線部に対してそれぞれ対向配置されているため、基板平面内で基板を時計方向と反時計方向との２方向に回動させることができるので、位置決め作業をより容易に行える。   In the invention of this configuration, since the two straight portions constituting a part of the outer peripheral portion of the substrate are arranged opposite to the straight portions of the upper portion of the cover, the substrate is rotated clockwise and counterclockwise in the substrate plane. Therefore, the positioning operation can be performed more easily.

以下、本発明の一実施形態を図面に基づいて説明する。
図１には本実施形態にかかる測定器としての圧力計の一部を切り欠いた側面が示され、図２には圧力計の正面が示され、図３には圧力計の裏面が示されている。
これらの図において、圧力計は、図示しない配管等に取り付けられる継ぎ手１と、この継ぎ手１に固定された基板２と、継ぎ手１に基端部が固定される渦巻き型のブルドン管３と、基板２の正面に取り付けられる目盛板４と、この目盛板４と基板２との外周部に嵌合されるカバー５とを備えた構造である。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a side surface in which a part of a pressure gauge as a measuring instrument according to this embodiment is cut out, FIG. 2 shows a front face of the pressure gauge, and FIG. 3 shows a back face of the pressure gauge. ing.
In these drawings, a pressure gauge includes a joint 1 attached to a pipe (not shown), a substrate 2 fixed to the joint 1, a spiral Bourdon tube 3 having a base end fixed to the joint 1, and a substrate. 2 is a structure including a scale plate 4 attached to the front surface of 2 and a cover 5 fitted to the outer peripheral portion of the scale plate 4 and the substrate 2.

図１に示される通り、継ぎ手１は、一端部に設けられたねじ部１１と、ねじ部１１に一体に形成さえた六角部１２と、この六角部１２の他端部側に形成されたリング状起立部１３とを備えた黄銅系金属部材であり、その軸芯に沿って圧力導入孔１Ａが形成されている。
基板２は、継ぎ手１と同様に黄銅製金属部材から形成された板状部材であり、その中心部が継ぎ手１の外周部にカシメで接合固定されている。
基板２は、その中心部が継ぎ手１のリング状起立部１３の外周部と接合する嵌合部４１Ａとされ、この嵌合部４１Ａから所定寸法外周に向かう位置には補強用の折り曲げ部４１Ｂがリング状に形成されている。
図２に示される通り、基板２は、その外周部が円弧状部２Ａと、この円弧状部２Ａの一端部から連続形成された第１直線部２Ｂと、円弧状部２Ａの他端部から連続形成される第２直線部２Ｃとを備え、これらの第１直線部２Ｂと第２直線部２Ｃとが接続された略扇形状とされる。円弧状部２Ａは、その円弧中心が継ぎ手１の圧力導入孔１Ａであり、円弧を構成する角度は１８０度より大きい。第１直線部２Ｂと第２直線部２Ｃとは同じ長さ寸法であって１８０度未満の角度で折れ曲がって形成されている。 As shown in FIG. 1, the joint 1 includes a screw portion 11 provided at one end portion, a hexagonal portion 12 that is integrally formed with the screw portion 11, and a ring formed on the other end portion side of the hexagonal portion 12. This is a brass-based metal member provided with a raised portion 13, and a pressure introducing hole 1 </ b> A is formed along the axial center.
The substrate 2 is a plate-like member formed of a brass metal member, like the joint 1, and its central portion is joined and fixed to the outer peripheral portion of the joint 1 by caulking.
The center portion of the substrate 2 is a fitting portion 41A that is joined to the outer peripheral portion of the ring-like upright portion 13 of the joint 1. A reinforcing bent portion 41B is provided at a position from the fitting portion 41A toward the outer periphery of a predetermined dimension. It is formed in a ring shape.
As shown in FIG. 2, the substrate 2 has an arcuate part 2 </ b> A on the outer periphery, a first straight part 2 </ b> B formed continuously from one end part of the arcuate part 2 </ b> A, and the other end part of the arcuate part 2 </ b> A. The second straight part 2C is formed continuously, and the first straight part 2B and the second straight part 2C are connected to each other to form a substantially fan shape. The arc-shaped portion 2A has the arc center at the pressure introducing hole 1A of the joint 1, and the angle forming the arc is larger than 180 degrees. The first straight part 2B and the second straight part 2C have the same length and are bent at an angle of less than 180 degrees.

図１及び図２に示される通り、ブルドン管３は、基端部を構成する株部３１と、この株部３１と一体形成された渦巻き部３２とを備えたベリリウム銅製部品であり、この渦巻き部３２の先端部には指針６が固定されている。
株部３１は、その一端部が継ぎ手１に半田付けで固定された略円筒状部材であり、その内部が継ぎ手１の圧力導入孔１Ａに連通されている。株部３１と圧力導入孔１Ａとの軸芯は略同一軸線上にある。
渦巻き部３２の先端は封止されており、そのため、圧力導入孔１Ａから株部３１の内部に圧力が挿入されると、渦巻き部３２の先端部に取り付けられた指針６が略円弧状に沿って移動する。
指針６は黄銅製であり、正面三角形状に形成されている。指針６の正面は見やすくするために目盛板４と異なる色を用いることができる。 As shown in FIGS. 1 and 2, the Bourdon tube 3 is a beryllium copper part provided with a stock portion 31 constituting a base end portion and a spiral portion 32 formed integrally with the stock portion 31. A pointer 6 is fixed to the tip of the portion 32.
The stock portion 31 is a substantially cylindrical member whose one end is fixed to the joint 1 by soldering, and the inside thereof communicates with the pressure introduction hole 1A of the joint 1. The axial centers of the stock portion 31 and the pressure introducing hole 1A are substantially on the same axis.
The tip of the spiral portion 32 is sealed, so that when pressure is inserted into the stock portion 31 from the pressure introduction hole 1A, the pointer 6 attached to the tip portion of the spiral portion 32 follows a substantially arc shape. Move.
The pointer 6 is made of brass and has a front triangular shape. The front surface of the pointer 6 can use a color different from that of the scale plate 4 for easy viewing.

目盛板４は、基板２の正面に取り付けられ、かつ、その外周部が円弧状部４Ａと切欠部４Ｂとが連続形成された形状である。
円弧状部４Ａは基板２の円弧状部２Ａと略同じ径を有するものであり、円弧を構成する角度は基板２の円弧状部２Ａの角度より大きい。
切欠部４Ｂは円弧状部２Ａの両端部を繋ぐ直線部である。
目盛板４は、アルミニウムからなる板状部材であり、その中心部は基板２の嵌合部４１Ａの外周部に接合される。
目盛板４の正面には、圧力値を表示する数値、図２では、「０」、「５」、「１５」、「２０」、「３０」、その数値に対応する表示エリア４２Ａで形成される目盛が印刷、その他の適宜な手段で形成されている。この数値及び表示エリア４２Ａからなる目盛が指針６で指されることになる。 The scale plate 4 is attached to the front surface of the substrate 2 and has a shape in which an outer peripheral portion is continuously formed with an arcuate portion 4A and a cutout portion 4B.
The arc-shaped portion 4A has substantially the same diameter as the arc-shaped portion 2A of the substrate 2, and the angle forming the arc is larger than the angle of the arc-shaped portion 2A of the substrate 2.
The cutout portion 4B is a straight portion that connects both end portions of the arcuate portion 2A.
The scale plate 4 is a plate-like member made of aluminum, and its central portion is joined to the outer peripheral portion of the fitting portion 41 </ b> A of the substrate 2.
On the front face of the scale plate 4, a numerical value for displaying the pressure value, “0”, “5”, “15”, “20”, “30” in FIG. 2 and a display area 42 A corresponding to the numerical value are formed. The scale is formed by printing or other appropriate means. The scale composed of the numerical value and the display area 42A is pointed by the pointer 6.

カバー５は基板２の外周部が嵌合される立上部５１と目盛板４の正面を覆うカバー本体５２とが一体に形成された構造である。カバー５はアクリル、その他の合成樹脂であって透明の材料を用いて射出成形により形成されるものである。
立上部５１は、目盛板４の外周部を全周に渡って嵌合するものであり、その平面形状は目盛板４の平面形状と略同じである。つまり、立上部５１は目盛板４の円弧状部４Ａと略同じ径を有する円弧状部５１Ａと切欠部５１Ｂとが連続形成された構造である。円弧状部５１Ａの円弧を構成する角度は目盛板４の円弧状部４Ａと同じである。 The cover 5 has a structure in which an upright portion 51 to which the outer peripheral portion of the substrate 2 is fitted and a cover main body 52 that covers the front surface of the scale plate 4 are integrally formed. The cover 5 is an acrylic or other synthetic resin and is formed by injection molding using a transparent material.
The upright portion 51 fits the outer peripheral portion of the scale plate 4 over the entire circumference, and the planar shape thereof is substantially the same as the planar shape of the scale plate 4. That is, the upright portion 51 has a structure in which an arc-shaped portion 51A and a notch 51B having substantially the same diameter as the arc-shaped portion 4A of the scale plate 4 are continuously formed. The angle forming the arc of the arc-shaped portion 51A is the same as that of the arc-shaped portion 4A of the scale plate 4.

切欠部５１Ｂは円弧状部５１Ａの両端部を繋ぐ直線部であり、この直線部の内周部に基板２の第１直線部２Ｂの外周部と第２直線部２Ｃの外周部とが互いに対向される。図２においては、第１直線部２Ｂと第２直線部２Ｃとの接続部分が切欠部５１Ｂの中心部分に近接されており、この近接部分を中心として第１直線部２Ｂと切欠部５１Ｂとは所定角度形成され、同様に、近接部分を中心として第２直線部２Ｃと切欠部５１Ｂとは所定角度形成されている。つまり、基板２はカバー５の立上部５１内で目盛板４に対して回動可能とされる。   The notch 51B is a straight line connecting both ends of the arcuate part 51A, and the outer peripheral part of the first straight part 2B and the outer peripheral part of the second straight part 2C of the substrate 2 face each other on the inner peripheral part of this linear part. Is done. In FIG. 2, the connecting portion between the first straight portion 2B and the second straight portion 2C is close to the center portion of the notch 51B, and the first straight portion 2B and the notch 51B are centered on this close portion. Similarly, the second straight portion 2C and the cutout portion 51B are formed at a predetermined angle with the proximity portion as the center. That is, the substrate 2 can be rotated with respect to the scale plate 4 in the rising portion 51 of the cover 5.

次に、本実施形態の圧力計を製造する方法について説明する。
［仮組工程］
まず、基板２に継ぎ手１を固定する。そして、ブルドン管３の先端部に指針６を固定するとともに、ブルドン管３の株部３１を継ぎ手１に溶接で固定する。
目盛板４の嵌合部４１Ａの内周部に形成された窓に指針６が固定されたブルドン管３を挿通させて目盛板４の裏面を基板２に重ね合わせる。そして、基板２と目盛板４との外周部をカバー５の立上部５１の内周部に嵌合させる。 Next, a method for manufacturing the pressure gauge of the present embodiment will be described.
[Temporary assembly process]
First, the joint 1 is fixed to the substrate 2. And while fixing the pointer | guide 6 to the front-end | tip part of the Bourdon tube 3, the stock | stock part 31 of the Bourdon tube 3 is fixed to the joint 1 by welding.
The Bourdon tube 3 to which the pointer 6 is fixed is inserted into a window formed in the inner peripheral portion of the fitting portion 41A of the scale plate 4 so that the back surface of the scale plate 4 is superposed on the substrate 2. Then, the outer peripheral portions of the substrate 2 and the scale plate 4 are fitted to the inner peripheral portion of the upright portion 51 of the cover 5.

［ゼロ点設定工程］
継ぎ手１から試験的に所定の圧力を導入する。この試験的に導入される圧力値は圧力計自体の許容値より大きく、例えば、許容値の１．５倍である。
圧力を導入されたブルドン管３は、その渦巻き部３２が拡張し、その先端部に取り付けられた指針６が図２中時計方向に回動する。その後、ブルドン管３から試験的に導入した圧力を排出する。すると、渦巻き部３２が収縮し、ブルドン管３の先端部に取り付けられた指針６が反時計方向に回動して所定位置に静止する。この指針６が静止した位置がゼロ点である。この状態では、指針６が目盛板４に形成されたゼロ点位置、図２では、［０］と表示されたエリアから外れた位置を指すことがある（図４参照）。 [Zero point setting process]
A predetermined pressure is experimentally introduced from the joint 1. This experimentally introduced pressure value is larger than the allowable value of the pressure gauge itself, for example, 1.5 times the allowable value.
In the Bourdon tube 3 to which pressure is introduced, the spiral portion 32 expands, and the pointer 6 attached to the tip portion rotates clockwise in FIG. Thereafter, the pressure introduced experimentally from the Bourdon tube 3 is discharged. Then, the spiral portion 32 contracts, and the pointer 6 attached to the distal end portion of the Bourdon tube 3 rotates counterclockwise and stops at a predetermined position. The zero point is the position where the pointer 6 is stationary. In this state, the pointer 6 may indicate a zero point position formed on the scale plate 4 and a position deviated from an area labeled [0] in FIG. 2 (see FIG. 4).

［位置決め工程］
図４に示される通り、指針６が目盛板４に形成されたゼロ点位置、［０］と表示されたエリアから外れた「５」に近い位置を指す場合、指針６が目盛板４に形成されたゼロ点位置、［０］と表示されたエリアと一致するように継ぎ手１をもって基板２を目盛板４の平面内であって目盛板４に対してブルドン管３の株部３１を回動中心として回動する。図４では、矢印Ｐで示されるような反時計方向に回動させて位置決する。
［基板固定工程］
指針６と目盛板４との位置決めが行われたら、基板２と目盛板４との間やカバー５と基板２及び目盛板４との間を接着剤Ｂ等で固定する（図３参照） [Positioning process]
As shown in FIG. 4, the pointer 6 is formed on the scale plate 4 when the pointer 6 indicates a zero point position formed on the scale plate 4, or a position close to “5” outside the area indicated by [0]. Rotate the stock 31 of the Bourdon tube 3 with respect to the scale plate 4 in the plane of the scale plate 4 with the joint 1 so that it coincides with the zero point position and [0] indicated area. Rotates as the center. In FIG. 4, the position is determined by rotating counterclockwise as indicated by an arrow P.
[Board fixing process]
When the pointer 6 and the scale plate 4 are positioned, the space between the substrate 2 and the scale plate 4 and between the cover 5 and the substrate 2 and the scale plate 4 are fixed with an adhesive B or the like (see FIG. 3).

従って、本実施形態では次の効果を奏することができる。
（１）継ぎ手１に固定され外周部に円弧状部を有する基板２と、継ぎ手１に株部３１が固定されるとともに先端部に指針６が取り付けられた渦巻き型ブルドン管３と、基板２に取り付けられた目盛板４と、この目盛板４と基板２との外周部が嵌合される立上部５１と目盛板４の正面を覆うカバー本体５２とが一体に形成されたカバー５とを備え、かつ、目盛板４とカバー５の立上部５１との外周部にそれぞれ基板２の円弧状部と略同じ径を有する円弧状部４Ａ，５１Ａと切欠部４Ｂ，５１Ｂとが連続形成された圧力計において、基板２はカバー５の立上部内で目盛板４に対してブルドン管３の株部３１を回動中心として回動して位置決めされる構成としたので、この回動操作をカバー５１の正面から目盛板４と指針６とを見ながら簡単に行える。そのため、作業員の感や熟練度に影響されることなく、正面が非円形形状の圧力計においてゼロ点位置を調整する作業を容易に行うことができる。 Therefore, in this embodiment, the following effects can be achieved.
(1) A substrate 2 fixed to the joint 1 and having an arcuate portion on the outer periphery, a spiral Bourdon tube 3 having a stock portion 31 fixed to the joint 1 and a pointer 6 attached to the tip, and a substrate 2 An attached scale plate 4, a cover 5 in which an upright portion 51 to which the outer peripheral portion of the scale plate 4 and the substrate 2 are fitted, and a cover body 52 covering the front surface of the scale plate 4 are integrally formed. In addition, the arc-shaped portions 4A and 51A and the cutout portions 4B and 51B having substantially the same diameter as the arc-shaped portion of the substrate 2 are continuously formed on the outer peripheral portions of the scale plate 4 and the upright portion 51 of the cover 5, respectively. In the total, since the substrate 2 is positioned in the upright portion of the cover 5 by rotating with respect to the scale plate 4 with the stock 31 of the Bourdon tube 3 as the rotation center, this rotation operation is performed by the cover 51. Easy to see while looking at the scale plate 4 and the pointer 6 from the front . Therefore, it is possible to easily perform the operation of adjusting the zero point position in a pressure gauge having a non-circular front surface without being affected by the feeling and skill of the worker.

（２）前述の構成の圧力計を製造する方法として、継ぎ手１、基板２、ブルドン管３、目盛板４及びカバー５を仮組する仮組工程と、継ぎ手１から試験的に所定の圧力を導入してブルドン管３に取り付けられた指針６を回動させた後にブルドン管３から圧力を排出して指針６が静止した位置をゼロ点とするゼロ点設定工程と、指針６が目盛板４に形成されたゼロ点位置と合うように基板２を継ぎ手１ごと回動する位置決め工程と、この位置決め工程で位置決めされた基板２、目盛板４及びカバー５の相互間を固定する基板固定工程とを備えた構成としたので、前述の効果を奏する圧力計の製造方法を提供することができる。そして、基板固定工程によって、カバー５と基板２及び目盛板４とが誤って外れることがない。 (2) As a method of manufacturing a pressure gauge having the above-described configuration, a temporary assembly process of temporarily assembling the joint 1, the substrate 2, the Bourdon tube 3, the scale plate 4 and the cover 5, and a predetermined pressure from the joint 1 on a trial basis. A zero point setting step in which the position at which the pointer 6 rests after discharging the pressure from the Bourdon tube 3 after rotating the pointer 6 that is introduced and attached to the Bourdon tube 3 and the pointer 6 is the scale plate 4 A positioning step of rotating the substrate 2 together with the joint 1 so as to match the zero point position formed on the substrate, and a substrate fixing step of fixing the substrate 2, the scale plate 4 and the cover 5 positioned in this positioning step; Therefore, it is possible to provide a pressure gauge manufacturing method that exhibits the above-described effects. And the cover 5, the board | substrate 2, and the scale plate 4 do not remove accidentally by a board | substrate fixing process.

（３）目盛板４とカバー５の立上部５１との切欠部４Ｂ，５１Ｂは、それぞれ円弧状部の両端部をつなぐ直線部とされ、基板２の外周部はカバー５の立上部５１と対向する第１直線部２Ｂ及び第２直線部２Ｃを備えた略扇形状とした。そのため、基板２の外周部の一部を構成する２つの直線部２Ｂ，２Ｃがカバー５の立上部５１の切欠き部５１Ｂに対してそれぞれ対向配置された構成となるので、基板２の平面内で基板２を時計方向と反時計方向との２方向に回動させることができるので、位置決め作業をより容易に行える。 (3) The notches 4B and 51B between the scale plate 4 and the upright portion 51 of the cover 5 are respectively straight portions connecting both ends of the arcuate portion, and the outer peripheral portion of the substrate 2 is opposed to the upright portion 51 of the cover 5. The first straight portion 2B and the second straight portion 2C are provided in a substantially fan shape. For this reason, the two linear portions 2B, 2C constituting a part of the outer peripheral portion of the substrate 2 are arranged so as to be opposed to the notch portion 51B of the rising portion 51 of the cover 5, respectively. Thus, since the substrate 2 can be rotated in two directions, clockwise and counterclockwise, the positioning operation can be performed more easily.

なお、本発明は前述の実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
例えば、前記実施形態では、目盛板４を一枚のアルミからなる板状部材から形成したが、本発明では、目盛板４を複数枚から形成してよい。例えば、図５に示される通り、目盛板４を、黄銅製金属部材からなるベース板４０と、このベース板４０の表面に貼り合わされたプラスチック製や紙製からなる表示板４３とを備えて構成するものでもよい。この構成の目盛板４では、表示板４３を印刷しやすい材料、例えば、プラスチック製等のシートから形成することが可能となる。表示板４３をプラスチックシートという剛性の低い材料から形成しても、この表示板４３を剛性の高いベース板４０で補強されることになるので、表示板４３が変形しない。
さらに、前記実施形態では、カバー５はアクリル、その他の合成樹脂であって透明の樹脂を用いて射出成形により形成したが、本発明では、カバー本体５２が透明であればよく、立上部５１をアルミニウム等の金属から形成してもよい。 It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the above embodiment, the scale plate 4 is formed from a single plate-like member made of aluminum. However, in the present invention, the scale plate 4 may be formed from a plurality of pieces. For example, as shown in FIG. 5, the scale plate 4 includes a base plate 40 made of a brass metal member and a display plate 43 made of plastic or paper bonded to the surface of the base plate 40. You may do it. In the scale plate 4 having this configuration, the display plate 43 can be formed from a material that is easy to print, for example, a sheet made of plastic or the like. Even if the display plate 43 is formed from a low-rigidity material such as a plastic sheet, the display plate 43 is reinforced by the base plate 40 having a high rigidity, so that the display plate 43 is not deformed.
Further, in the above embodiment, the cover 5 is formed by injection molding using a transparent resin made of acrylic or other synthetic resin. However, in the present invention, the cover main body 52 may be transparent, and the upright portion 51 is formed. You may form from metals, such as aluminum.

本発明に適用される測定器は圧力計に限定されるものではなく、ブルドン管を用いた温度計にも適用することができる。
そして、正面が非円形形状であればいかなる測定器にも適用可能であり、例えば、目盛４及びカバー５の正面形状が互いに対向する位置に２カ所の直線状切欠部があり、これらの切欠部の端部を円弧状部で接続する形状のものにも適用することができる。 The measuring instrument applied to the present invention is not limited to a pressure gauge, and can also be applied to a thermometer using a Bourdon tube.
If the front surface is a non-circular shape, it can be applied to any measuring device. For example, there are two linear notches at positions where the front shapes of the scale 4 and the cover 5 face each other. The present invention can also be applied to a shape in which the end portions are connected by an arcuate portion.

本発明は、圧力計、その他の測定器に利用することができる。   The present invention can be used for pressure gauges and other measuring instruments.

本発明の一実施形態にかかる測定器の一部を破断した断面図。Sectional drawing which fractured | ruptured a part of measuring device concerning one Embodiment of this invention. 前記測定器の正面図。The front view of the said measuring device. 前記測定器の裏面図。The back view of the said measuring device. 前記測定器を組み立てる一工程を示すもので図２に対応した図。FIG. 3 shows one process for assembling the measuring device and corresponds to FIG. 2. 本発明の変形例を示す図１に相当する図。The figure equivalent to FIG. 1 which shows the modification of this invention.

符号の説明Explanation of symbols

１…継ぎ手、１Ａ…圧力導入孔、２…基板、２Ａ…円弧状部、２Ｂ…第１直線部、２Ｃ…第２直線部、３…ブルドン管、３１…株部（基端部）、３２…渦巻き部、４…目盛板、４Ａ…円弧状部、４Ｂ…切欠部（直線部）、４１Ｂ…切欠部（直線部）、５…カバー、５１…立上部、５１Ａ…円弧状部、５１Ｂ…切欠部（直線部）、５２…カバー本体、６…指針   DESCRIPTION OF SYMBOLS 1 ... Joint, 1A ... Pressure introduction hole, 2 ... Board | substrate, 2A ... Arc-shaped part, 2B ... 1st linear part, 2C ... 2nd linear part, 3 ... Bourdon tube, 31 ... Stock part (base end part), 32 ... spiral part, 4 ... scale plate, 4A ... arc-shaped part, 4B ... notch part (straight line part), 41B ... notch part (straight line part), 5 ... cover, 51 ... upright part, 51A ... arc-shaped part, 51B ... Cutout part (straight line part), 52 ... Cover body, 6 ... Pointer

Claims (3)

圧力導入孔が形成された継ぎ手と、この継ぎ手に固定され外周部に円弧状部を有する基板と、前記継ぎ手に基端部が固定されるとともに先端部に指針が取り付けられ前記圧力導入孔から導入された圧力により前記先端部が回動するブルドン管と、前記基板に取り付けられ前記指針で指される目盛が正面に形成された目盛板と、この目盛板と前記基板との外周部が嵌合される立上部と前記目盛板の正面を覆うカバー本体とが一体に形成されたカバーとを備え、前記目盛板と前記カバーの立上部との外周部にそれぞれ前記基板の円弧状部と略同じ径を有する円弧状部と切欠部とが連続形成された測定器であって、
前記基板は前記カバーの立上部内で前記目盛板に対して前記ブルドン管の基端部を回動中心として回動して位置決めされることを特徴とする測定器。 A joint formed with a pressure introduction hole, a substrate fixed to the joint and having an arcuate portion on the outer periphery, a base end portion fixed to the joint, and a pointer attached to a distal end portion, which is introduced from the pressure introduction hole A Bourdon tube whose tip is rotated by the applied pressure, a scale plate attached to the substrate and having a scale pointed by the pointer formed on the front, and an outer peripheral portion of the scale plate and the substrate are fitted together And a cover integrally formed with a cover main body that covers the front surface of the scale plate. The outer peripheral portions of the scale plate and the upright portion of the cover are substantially the same as the arc-shaped portions of the substrate, respectively. A measuring instrument in which an arcuate part having a diameter and a notch part are continuously formed,
The measuring device according to claim 1, wherein the substrate is positioned by rotating around a base end portion of the Bourdon tube with respect to the scale plate in a standing portion of the cover. 請求項１に記載された測定器において、前記目盛板と前記カバーの立上部との切欠部は、それぞれ前記円弧状部の両端部をつなぐ直線部とされ、前記基板の外周部は前記カバーの立上部と対向する２つの直線部を備えた略扇形状とされることを特徴とする測定器。   2. The measuring instrument according to claim 1, wherein the notch portion of the scale plate and the upright portion of the cover is a straight portion connecting both ends of the arcuate portion, and the outer peripheral portion of the substrate is the cover. A measuring instrument characterized by being substantially fan-shaped with two straight portions facing the upright portion. 圧力導入孔が形成された継ぎ手と、この継ぎ手に固定され外周部に円弧状部を有する基板と、前記継ぎ手に基端部が固定されるとともに先端部に指針が取り付けられ前記圧力導入孔から導入された圧力により前記先端部が回動するブルドン管と、前記基板に取り付けられ前記指針で指される目盛が正面に形成された目盛板と、この目盛板と前記基板との外周部が嵌合され前記目盛板の正面を覆うカバーとを備え、前記目盛板と前記カバーとの外周部に、それぞれ前記基板の円弧状部と略同じ径を有する円弧状部と切欠部とが連続形成された測定器を製造する方法であって、
前記基板に前記継ぎ手を固定し、この継ぎ手に前記ブルドン管の基端部を取り付けるとともに前記ブルドン管の先端部に前記指針を取り付け、前記目盛板を、予め形成された窓に前記指針及び前記ブルドン管を挿通するとともに、裏面を前記基板に重ね合わせ、前記基板と前記目盛板とを前記カバーに嵌合する仮組工程と、
前記継ぎ手から試験的に所定の圧力を導入して前記ブルドン管に取り付けられた前記指針を回動させた後に前記ブルドン管から圧力を排出して前記指針が静止した位置をゼロ点とするゼロ点設定工程と、
前記ゼロ点設定工程で前記指針が前記目盛板に形成されたゼロ点位置と合うように前記基板を前記目盛板の平面内であって前記目盛板に対して前記ブルドン管の基端部を回動中心として回動して位置決めする位置決め工程と、
この位置決め工程で位置決めされた前記基板と前記目盛板とを固定する基板固定工程とを備えたことを特徴とする測定器の製造方法。 A joint formed with a pressure introduction hole, a substrate fixed to the joint and having an arcuate portion on the outer periphery, a base end portion fixed to the joint, and a pointer attached to a distal end portion, which is introduced from the pressure introduction hole A Bourdon tube whose tip is rotated by the applied pressure, a scale plate attached to the substrate and having a scale pointed by the pointer formed on the front, and an outer peripheral portion of the scale plate and the substrate are fitted together And a cover that covers the front surface of the scale plate, and an arc-shaped portion and a cutout portion having substantially the same diameter as the arc-shaped portion of the substrate are continuously formed on the outer periphery of the scale plate and the cover, respectively. A method of manufacturing a measuring instrument,
The joint is fixed to the substrate, the base end of the Bourdon tube is attached to the joint, the pointer is attached to the tip of the Bourdon tube, the scale plate is attached to the pre-formed window, and the pointer and the Bourdon A temporary assembling step of inserting a tube, superimposing a back surface on the substrate, and fitting the substrate and the scale plate to the cover;
A zero point where a zero point is a position where the pointer rests after the pressure attached to the Bourdon tube is rotated by introducing a predetermined pressure from the joint and then the pointer attached to the Bourdon tube is rotated. A setting process;
In the zero point setting step, the base plate of the Bourdon tube is rotated with respect to the scale plate in the plane of the scale plate so that the pointer is aligned with the zero point position formed on the scale plate. A positioning step of rotating and positioning as a moving center;
A method for manufacturing a measuring instrument, comprising: a substrate fixing step for fixing the substrate positioned in the positioning step and the scale plate.
JP2005219607A 2005-07-28 2005-07-28 Measuring instrument and manufacturing method thereof Active JP4523508B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008099657A1 (en) 2007-02-14 2008-08-21 Nec Corporation Semiconductor integrated circuit, debug/trace circuit, and semiconductor integrated circuit operation observing method
JP2020063990A (en) * 2018-10-18 2020-04-23 モリタ宮田工業株式会社 Manometer
JP7372180B2 (en) 2020-03-11 2023-10-31 長野計器株式会社 Fire extinguisher pressure gauge and scale plate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6339651U (en) * 1986-08-29 1988-03-15
JPH0530108Y2 (en) * 1987-06-08 1993-08-02
JP2001099733A (en) * 1999-10-01 2001-04-13 Nagano Keiki Co Ltd Pressure gage
JP2003118427A (en) * 2001-10-09 2003-04-23 Mitsubishi Motors Corp Display device for vehicle cabin

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6339651U (en) * 1986-08-29 1988-03-15
JPH0530108Y2 (en) * 1987-06-08 1993-08-02
JP2001099733A (en) * 1999-10-01 2001-04-13 Nagano Keiki Co Ltd Pressure gage
JP2003118427A (en) * 2001-10-09 2003-04-23 Mitsubishi Motors Corp Display device for vehicle cabin

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008099657A1 (en) 2007-02-14 2008-08-21 Nec Corporation Semiconductor integrated circuit, debug/trace circuit, and semiconductor integrated circuit operation observing method
JP2020063990A (en) * 2018-10-18 2020-04-23 モリタ宮田工業株式会社 Manometer
JP7161909B2 (en) 2018-10-18 2022-10-27 モリタ宮田工業株式会社 pressure gauge
JP7372180B2 (en) 2020-03-11 2023-10-31 長野計器株式会社 Fire extinguisher pressure gauge and scale plate

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