JPH08166299A - Initial fastening force measuring method for existing boil in flange joining part and measurement jig used for the measuring method - Google Patents
Initial fastening force measuring method for existing boil in flange joining part and measurement jig used for the measuring methodInfo
- Publication number
- JPH08166299A JPH08166299A JP6307985A JP30798594A JPH08166299A JP H08166299 A JPH08166299 A JP H08166299A JP 6307985 A JP6307985 A JP 6307985A JP 30798594 A JP30798594 A JP 30798594A JP H08166299 A JPH08166299 A JP H08166299A
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- measuring
- existing
- force
- tightening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B29/00—Accessories
- B25B29/02—Bolt tensioners
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、フランジ接合部に用い
られている既設締付ボルトの当初締付力の測定方法及び
この測定方法に用いられる測定冶具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring an initial tightening force of an existing tightening bolt used in a flange joint and a measuring jig used in this measuring method.
【０００２】[0002]
【従来の技術】図３は従来の既設締付ボルトの締付力測
定装置（冶具）の説明図であって、１、１ａは先端にボ
ルト及びナットの逃げ部２、２ａを形成した測定冶具、
３は測定冶具固定用ボルト、４は測定用ボルト、５は測
定用ナット、６はボルト長測定装置、７、７ａはリード
線である。上記測定用冶具は、初期長さが不明の既設締
付ボルト９を使用したフランジ部８、８ａの既設ボルト
９の締付力を測定するため、初期長さが既知の測定用ボ
ルト４を装着した冶具１、１ａによりフランジ部８、８
ａを挟み込んで締め付け、既設締付ボルト９の全長の変
化を測定装置６により測定しつつ、フランジ部８、８ａ
の内面の間隔Ｗが一定となるよう測定用ボルト４の締付
力を増加させると共に、既設締付ボルト９のナット９ａ
を弛め、既設締付ボルト９長の変化がなくなった時点の
測定用ボルト４の長さより、当初の締付力を求めるもの
である。2. Description of the Related Art FIG. 3 is an explanatory view of a conventional tightening force measuring device (jig) for an existing tightening bolt. Reference numerals 1 and 1a are measuring jigs having relief portions 2 and 2a for bolts and nuts formed at tips thereof. ,
Reference numeral 3 is a measuring jig fixing bolt, 4 is a measuring bolt, 5 is a measuring nut, 6 is a bolt length measuring device, and 7 and 7a are lead wires. The above-described measuring jig uses the existing tightening bolt 9 of which the initial length is unknown. To measure the tightening force of the existing bolt 9 of the flange portions 8 and 8a, the measuring bolt 4 having the known initial length is mounted. Flanges 8 and 8 by the jigs 1 and 1a
While sandwiching and tightening a, while measuring the change in the total length of the existing tightening bolt 9 with the measuring device 6, the flange portions 8 and 8a
The tightening force of the measuring bolt 4 is increased so that the distance W between the inner surfaces of the nuts 9a and 9a of the existing tightening bolt 9 is increased.
The initial tightening force is obtained from the length of the measuring bolt 4 when the length of the existing tightening bolt 9 is no longer changed.
【０００３】[0003]
【発明が解決しようとする課題】上記従来例の冶具は、
測定作業において、ボルトの締付力を確保するために、
フランジ８、８ａの内面の間隔Ｗを一定に保つ必要があ
り、また、測定用ボルト４の締付力の増加に対して既設
締付ボルト９の締付力を解除するために、図４において
Ａ点まではナット９ａを弛める必要がある。また、ナッ
ト９ａが錆付きにより回転しない場合には、既設締付ボ
ルト９の締付力が解除できないことから測定不能とな
る。また、フランジ部８、８ａの内面の間隔Ｗを正確に
測定すること、その間隔Ｗを一定に保ちながらナット９
ａを操作するには、精密な測定機器と高い熟練度が必要
である。図５は測定用ボルト４の全長がＢ点に達したと
きの締付力Ｆを基準として既設締付ボルト９の締付力を
測定する説明図である。The jig of the above-mentioned conventional example is as follows.
In order to secure the tightening force of the bolt in the measurement work,
It is necessary to keep the distance W between the inner surfaces of the flanges 8 and 8a constant, and in order to release the tightening force of the existing tightening bolt 9 against the increase of the tightening force of the measuring bolt 4, in FIG. It is necessary to loosen the nut 9a up to the point A. Further, when the nut 9a does not rotate due to rusting, the tightening force of the existing tightening bolt 9 cannot be released, which makes measurement impossible. Further, the distance W between the inner surfaces of the flange portions 8 and 8a should be accurately measured, and the nut 9 should be maintained while keeping the distance W constant.
Precise measurement equipment and high skill are required to operate a. FIG. 5 is an explanatory diagram for measuring the tightening force of the existing tightening bolt 9 with reference to the tightening force F when the total length of the measuring bolt 4 reaches the point B.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記課題を解
決するのが目的であって、その構成は次のとおりであ
る。 １．測定用ボルトにより既設ボルトに引張力を加え、既
設ボルトの長さに変化が生じた時点での測定用ボルトの
引張力を測定し、この時の引張力の値は、既設ボルトの
当初の締付力に等しくなることにより、フランジ接合部
既設ボルトの当初の締付力を測定する既設ボルトの当初
締付力の測定方法。SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems, and the constitution thereof is as follows. 1. A tensile force is applied to the existing bolt with the measuring bolt, and the tensile force of the measuring bolt is measured when the length of the existing bolt changes.The value of the tensile force at this time is the initial tightening of the existing bolt. A method for measuring the initial tightening force of an existing bolt that measures the initial tightening force of an existing bolt that is connected to the flange joint by making it equal to the applied force.
【０００５】２．外フレーム内に既設ボルト又はナット
に連結するためのコネクターを組み込むと共に、このコ
ネクターに先端が連結された測定用ボルトを前記外フレ
ームの外に延長し、この測定用ボルトを測定用ナットに
より締め込み自在に構成して成るフランジ接合部既設ボ
ルトの当初締付力を測定するための冶具。[0005] 2. A connector for connecting to an existing bolt or nut is installed in the outer frame, the measuring bolt whose tip is connected to this connector is extended to the outside of the outer frame, and the measuring bolt is tightened with the measuring nut. A jig for measuring the initial tightening force of an existing bolt that has a flange joint that is freely configured.
【０００６】[0006]
【作用】コネクターを既設締付ボルトの頭又はナットに
連結し、測定用ナットを回転させると、測定用ボルトが
上昇し、コネクターに連結された既設締付ボルト又はナ
ットに引張りの力が作用する。一方、反力は外フレーム
を介してフランジで受ける。このようにして既設締付ボ
ルトに引張りの力を加えたときの既設締付ボルトの長さ
の変化を長さ測定器で測定し、その時の測定用ボルトの
長さより、測定用ボルトの引張力を求める。この測定用
ボルトの引張力の分だけ、既設締付ボルトのフランジに
対する締付力は減少するが、外フレームの反力として測
定用ボルトの引張力が加わるため、フランジに対する締
付力の合計は一定である。[Operation] When the connector is connected to the head or nut of the existing tightening bolt and the measuring nut is rotated, the measuring bolt rises and a tensile force acts on the existing tightening bolt or nut connected to the connector. . On the other hand, the reaction force is received by the flange via the outer frame. In this way, the change in the length of the existing tightening bolt when a tensile force is applied to the existing tightening bolt is measured with a length measuring instrument, and the tensile force of the measuring bolt is calculated from the length of the measuring bolt at that time. Ask for. The tightening force of the existing tightening bolt on the flange is reduced by the amount of the pulling force of the measuring bolt, but the tensile force of the measuring bolt is added as a reaction force of the outer frame, so the total tightening force on the flange is It is constant.
【０００７】[0007]
【実施例】図１に本発明の実施例を示す。１０は外フレ
ーム、１１は外フレーム１０内に組み込まれたコネクタ
ーであって、既設締付ボルト９の頭又はナット９ａに連
結自在である。１２は前記外フレーム１０の穴１０ａを
経由して内部に出入り自在に挿入されていると共に、先
端１２ａが前記コネクター１１に連結されている測定用
ボルト、１３は前記外フレーム１０の外側において、前
記測定用ボルト１２に螺合されている測定用ナットであ
って、この測定用ナット１３を回転させることにより、
測定用ボルト１２が出入りする。８、８ａはフランジ
部、９は既設締付ボルト、９ａは既設締付ボルト９のナ
ット、６は前記既設締付ボルト９の長さと測定用ボルト
１２の長さを超音波を利用して測定する測定器、６ａは
振動子、７、７ａはリード線である。EXAMPLE FIG. 1 shows an example of the present invention. Reference numeral 10 is an outer frame, and 11 is a connector incorporated in the outer frame 10, which can be connected to the head of the existing tightening bolt 9 or the nut 9a. Reference numeral 12 is a measurement bolt having a tip 12a connected to the connector 11 while being inserted into and out of the outer frame 10 through a hole 10a. It is a measuring nut screwed to the measuring bolt 12, and by rotating this measuring nut 13,
The measurement bolt 12 goes in and out. 8, 8a is a flange portion, 9 is an existing tightening bolt, 9a is a nut of the existing tightening bolt 9, 6 is the length of the existing tightening bolt 9 and the length of the measuring bolt 12 are measured using ultrasonic waves. Measuring instrument, 6a is a vibrator, and 7 and 7a are lead wires.
【０００８】次に、上記実施例の測定例を説明する。先
ず、対象となる既設締付ボルト９のナット９ａにコネク
ター１１を連結する。実施例の場合、この連結手段とし
てチャックを用いているが、その他の公知の連結手段を
用いてもよく、本発明において、この連結手段は問わな
い。但し、通常、フランジには数１０本のボルトが用い
られているものもあるので、作業性を考えると、簡単に
着脱できるものが良い。次に、測定用ナット１３を締め
込んで、コネクター１１、ナット９ａを介して既設締付
ボルト９に引張りの力を加え、このときの測定用ボルト
１２と既設締付ボルト９の長さ（伸び）を長さ測定器６
により測定する。なお、上記作用において、実施例は、
その構造上、既設締付ボルト９の引張力は、既設締付ボ
ルト９の締付力を減少させるが、引張力の反力がフラン
ジ部８ａに作用するため、締付力の合計は一定である。
長さ測定器６により、測定用ボルト１２で既設締付ボル
ト９に引張力をかけながらこの全長の変化を測定し、更
に測定用ナット１３を締め込んで測定用ボルト１２の引
張力を増大させる。そして、例えば既設締付ボルト９の
長さに変化が生じた時点（図２においてＰ点）での測定
用ボルト１２の引張力は、既設締付ボルト９の当初の締
付力と等しくなることにより、既設締付ボルト９の当初
締付力を測定する。Next, a measurement example of the above embodiment will be described. First, the connector 11 is connected to the nut 9a of the existing existing tightening bolt 9. In the embodiment, the chuck is used as the connecting means, but other known connecting means may be used, and the connecting means is not limited in the present invention. However, since several tens of bolts are usually used for the flange, it is preferable that the flange can be easily attached and detached in consideration of workability. Next, the measurement nut 13 is tightened, and a tensile force is applied to the existing tightening bolt 9 via the connector 11 and the nut 9a. At this time, the length of the measurement bolt 12 and the existing tightening bolt 9 (extension) is increased. ) The length measuring device 6
To measure. In the above operation, the embodiment is
Due to its structure, the tensile force of the existing tightening bolt 9 reduces the tightening force of the existing tightening bolt 9, but the reaction force of the tensile force acts on the flange portion 8a, so the total tightening force is constant. is there.
The length measuring device 6 measures the change in the overall length while applying a tensile force to the existing tightening bolt 9 with the measuring bolt 12, and further tightens the measuring nut 13 to increase the tensile force of the measuring bolt 12. . Then, for example, the tensile force of the measuring bolt 12 at the time when the length of the existing tightening bolt 9 changes (point P in FIG. 2) becomes equal to the initial tightening force of the existing tightening bolt 9. Then, the initial tightening force of the existing tightening bolt 9 is measured.
【０００９】[0009]
【発明の効果】本発明の効果は次のとおりである。 ａ．既設締付ボルトの締付力は、ボルト自身及び冶具に
より一定に保たれるため、フランジ内面の間隔の測定が
不要となる。 ｂ．ナットを弛めるという操作が不要となるため、ナッ
トが錆付き等により回転しない場合も測定可能である。
また、内圧を有するフランジ部の測定の安全性も向上す
る。The effects of the present invention are as follows. a. Since the tightening force of the existing tightening bolt is kept constant by the bolt itself and the jig, it is not necessary to measure the distance between the inner surfaces of the flange. b. Since the operation of loosening the nut is not necessary, measurement is possible even when the nut does not rotate due to rust or the like.
Further, the safety of measurement of the flange portion having the internal pressure is also improved.
【図１】本発明に係る測定装置とこの使用例の説明図。FIG. 1 is an explanatory view of a measuring device according to the present invention and an example of its use.
【図２】既設締付ボルトの締付力を測定するポイントの
説明図。FIG. 2 is an explanatory diagram of points for measuring a tightening force of an existing tightening bolt.
【図３】従来の測定装置の説明図。FIG. 3 is an explanatory diagram of a conventional measuring device.
【図４】測定用ボルトの締付量と各ボルトの長さの関係
を示す説明図。FIG. 4 is an explanatory view showing the relationship between the tightening amount of the measuring bolt and the length of each bolt.
【図５】測定用ボルトの長さ・変化と締付力の関係を示
す説明図。FIG. 5 is an explanatory view showing the relationship between the length / change of the measuring bolt and the tightening force.
６ 測定器 ６ａ 振動子 ７、７ａ リード線 ８、８ａ フランジ部 ９ 既設締付ボルト ９ａ ナット １０ 外フレーム １０ａ 穴 １１ コネクター １２ 測定用ボルト １２ａ 先端 １３ 測定用ナット 6 Measuring device 6a Transducer 7,7a Lead wire 8,8a Flange part 9 Existing tightening bolt 9a Nut 10 Outer frame 10a Hole 11 Connector 12 Measuring bolt 12a Tip 13 Measuring nut
Claims (2)
を加え、既設ボルトの長さに変化が生じた時点での測定
用ボルトの引張力を測定し、この時の引張力の値は、既
設ボルトの当初の締付力と等しくなることにより、フラ
ンジ接合部既設ボルトの当初の締付力を測定する既設ボ
ルトの当初締付力の測定方法。1. A tensile force is applied to an existing bolt by a measuring bolt, and the tensile force of the measuring bolt is measured at the time when the length of the existing bolt changes. A method of measuring the initial tightening force of an existing bolt that measures the initial tightening force of an existing bolt at the flange joint by making it equal to the initial tightening force of the bolt.
連結するためのコネクターを組み込むと共に、このコネ
クターに先端が連結された測定用ボルトを前記外フレー
ムの外に延長し、この測定用ボルトを測定用ナットによ
り締め込み自在に構成して成るフランジ接合部既設ボル
トの当初締付力を測定するための冶具。2. A connector for connecting to an existing bolt or nut is incorporated in the outer frame, and a measuring bolt whose tip is connected to the connector is extended outside the outer frame to measure the measuring bolt. A jig for measuring the initial tightening force of the existing bolts at the flange joint, which is configured to be tightened freely with a nut for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6307985A JPH08166299A (en) | 1994-12-12 | 1994-12-12 | Initial fastening force measuring method for existing boil in flange joining part and measurement jig used for the measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6307985A JPH08166299A (en) | 1994-12-12 | 1994-12-12 | Initial fastening force measuring method for existing boil in flange joining part and measurement jig used for the measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08166299A true JPH08166299A (en) | 1996-06-25 |
Family
ID=17975523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6307985A Pending JPH08166299A (en) | 1994-12-12 | 1994-12-12 | Initial fastening force measuring method for existing boil in flange joining part and measurement jig used for the measuring method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08166299A (en) |
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|---|---|---|---|---|
| CN104613876A (en) * | 2015-01-30 | 2015-05-13 | 华东理工大学 | Flange deflection angel monitoring system |
| KR101882614B1 (en) * | 2017-05-25 | 2018-07-26 | 이문승 | Assembly for Connecting Pipes |
| JP6381841B1 (en) * | 2018-02-28 | 2018-08-29 | 株式会社東日製作所 | Tensioning device |
| JP6381842B1 (en) * | 2018-02-28 | 2018-08-29 | 株式会社東日製作所 | Tensioning device |
| JP6381840B1 (en) * | 2018-02-28 | 2018-08-29 | 株式会社東日製作所 | Tensioning device |
| WO2019167327A1 (en) * | 2018-02-28 | 2019-09-06 | 株式会社東日製作所 | Pulling device |
| JP2020020370A (en) * | 2018-07-31 | 2020-02-06 | 株式会社東日製作所 | Pulling device |
| TWI810297B (en) * | 2018-12-11 | 2023-08-01 | 日商東日製作所股份有限公司 | Fastening method and fastening device for bolt and nut |
-
1994
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613876A (en) * | 2015-01-30 | 2015-05-13 | 华东理工大学 | Flange deflection angel monitoring system |
| KR101882614B1 (en) * | 2017-05-25 | 2018-07-26 | 이문승 | Assembly for Connecting Pipes |
| JP2019152438A (en) * | 2018-02-28 | 2019-09-12 | 株式会社東日製作所 | Pulling device |
| CN110418949A (en) * | 2018-02-28 | 2019-11-05 | 株式会社东日制作所 | Pulling device |
| JP6381840B1 (en) * | 2018-02-28 | 2018-08-29 | 株式会社東日製作所 | Tensioning device |
| WO2019167326A1 (en) * | 2018-02-28 | 2019-09-06 | 株式会社東日製作所 | Pulling device |
| WO2019167327A1 (en) * | 2018-02-28 | 2019-09-06 | 株式会社東日製作所 | Pulling device |
| WO2019167328A1 (en) * | 2018-02-28 | 2019-09-06 | 株式会社東日製作所 | Pulling device |
| JP2019152437A (en) * | 2018-02-28 | 2019-09-12 | 株式会社東日製作所 | Pulling device |
| JP2019152439A (en) * | 2018-02-28 | 2019-09-12 | 株式会社東日製作所 | Pulling device |
| JP6381841B1 (en) * | 2018-02-28 | 2018-08-29 | 株式会社東日製作所 | Tensioning device |
| JP6381842B1 (en) * | 2018-02-28 | 2018-08-29 | 株式会社東日製作所 | Tensioning device |
| CN110494726A (en) * | 2018-02-28 | 2019-11-22 | 株式会社东日制作所 | Pulling device |
| EP3561470A4 (en) * | 2018-02-28 | 2020-12-23 | Tohnichi Mfg. Co., Ltd. | Pulling device |
| US10794416B2 (en) | 2018-02-28 | 2020-10-06 | Tohnichi Mfg. Co., Ltd. | Tensioning device |
| US10828759B2 (en) | 2018-02-28 | 2020-11-10 | Tohnichi Mfg. Co., Ltd. | Tensioning device |
| US10850376B2 (en) | 2018-02-28 | 2020-12-01 | Tohnichi Mfg. Co., Ltd. | Tensioning device |
| JP2020020370A (en) * | 2018-07-31 | 2020-02-06 | 株式会社東日製作所 | Pulling device |
| TWI810297B (en) * | 2018-12-11 | 2023-08-01 | 日商東日製作所股份有限公司 | Fastening method and fastening device for bolt and nut |
| US11819964B2 (en) | 2018-12-11 | 2023-11-21 | Tohnichi Mfg.Co., Ltd. | Nut and bolt tightening method and tightening device |
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