JPH071264A - Bolt fastening torque measuring method - Google Patents

Bolt fastening torque measuring method

Info

Publication number
JPH071264A
JPH071264A JP5172398A JP17239893A JPH071264A JP H071264 A JPH071264 A JP H071264A JP 5172398 A JP5172398 A JP 5172398A JP 17239893 A JP17239893 A JP 17239893A JP H071264 A JPH071264 A JP H071264A
Authority
JP
Japan
Prior art keywords
torque
tightening
bolt
fastening
switch circuit
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
Application number
JP5172398A
Other languages
Japanese (ja)
Inventor
Tadashi Yoshida
正 吉田
Hideyuki Suwa
秀行 諏訪
Yoshihiro Kazama
儀弘 風間
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Plant Technologies Ltd
Original Assignee
Hitachi Plant Technologies Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Plant Technologies Ltd filed Critical Hitachi Plant Technologies Ltd
Priority to JP5172398A priority Critical patent/JPH071264A/en
Publication of JPH071264A publication Critical patent/JPH071264A/en
Pending legal-status Critical Current

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  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

PURPOSE:To perform easy, rapid, and high-precise measurement of fastening torque of a bolt and but even under any working environment. CONSTITUTION:A bolt fastening torque measuring method is a method to measure especially fastening increase torque after bolt fastening in a bolt and nut fastening work. An electric circuit having a switch circuit 28 is set by a tracer 24 arranged on the torque wrench 10 side used for fastening increase and a contact piece 26 positioned facing the tracer 24 and installed on the body to be fastened side with a microdistance therebetween. Microrotation by fastening operation of a torque wrench is captured by closing the switch circuit 28 and detected through measurement of torque during detection of electric displacement. Further, lighting ON of a lamp and sounding of a buzzer owing to electric displacement are executed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はボルト・ナット締め付け
作業における、締付トルク検査方法の中の増締めトルク
計測法に係り、特に、増締め時にナットが回り始めた瞬
間のトルクを正確に検出できる、ボルトの締め付けトル
ク計測方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tightening torque measuring method in a tightening torque inspection method for tightening bolts and nuts, and particularly to accurately detect the torque at the moment when the nut starts to rotate during the tightening. The present invention relates to a method for measuring the tightening torque of bolts.

【0002】[0002]

【従来の技術】従来、ボルト・ナット締め付け作業にお
ける、締付トルク検査は、簡便で、測定精度も比較的優
れており、かつ検査後に再度締付直す必要がないため、
通常、トルクレンチを用いた増締めトルク計測法が採用
されている。これはトルクレンチを用いて既に締め付け
られているボルト・ナットを増締めし、増締めによって
ナットが微小回転した瞬間のトルクを、トルクレンチに
おける置き針による指針表示を目視して判断するように
している。
2. Description of the Related Art Conventionally, tightening torque inspection in bolt and nut tightening work is simple, measurement accuracy is relatively excellent, and it is not necessary to tighten again after the inspection.
Generally, a tightening torque measurement method using a torque wrench is adopted. This is to tighten the bolts and nuts that have already been tightened with a torque wrench, and to judge the torque at the moment when the nut slightly rotates due to the tightening by visually observing the pointer display by the needle on the torque wrench. There is.

【0003】各種配管のフランジ締付作業等は、漏洩防
止のため高い締付精度での締付管理が要求されるため、
検査方法に関してもより以上の高い計測精度が必要とな
っている。
In the flange tightening work of various pipes, tightening control with high tightening accuracy is required to prevent leakage.
With regard to inspection methods, higher measurement accuracy is required.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、この種
の作業は多数の配管が乱立する狭隘な作業環境で行うこ
とが多いため、狭くかつ薄暗い作業スペースの中、無理
な姿勢で計測しなければならず、増締め時にナットが回
り始めた瞬間を、目視により判断することは事実上不可
能であり、どうしても計測トルクのバラツキが大きく、
信頼性の面で大きな問題があった。
However, since this kind of work is often performed in a narrow working environment in which a large number of pipes are disturbed, it is necessary to measure in an unnatural posture in a narrow and dim working space. However, it is virtually impossible to visually judge the moment when the nut starts to rotate during the retightening, and the variation in the measured torque is inevitable.
There was a big problem in terms of reliability.

【0005】また、検査員にかかる負担は多大のもので
あり、作業時間も長くかかるため作業効率が著しく悪か
った。
Further, the burden on the inspector is great and the working time is long, so that the working efficiency is extremely poor.

【0006】本発明はこのような事情に鑑みてなされた
もので、いかなる作業環境の中でも、ボルト・ナットの
締め付けトルクを容易に、迅速に、かつ高精度で計測で
きるボルトの締め付けトルク計測方法を提供することを
目的とする。
The present invention has been made in view of the above circumstances, and provides a bolt tightening torque measuring method capable of easily, quickly and highly accurately measuring the tightening torque of a bolt / nut in any working environment. The purpose is to provide.

【0007】[0007]

【課題を解決するための手段】本発明は、ボルトの締め
付けトルク計測が多数の配管が乱立する狭隘な作業環境
等で行われることが多く、狭くかつ薄暗い作業スペース
の中、無理な姿勢で計測しなければならず、増締め時に
ナットが回り始めた瞬間の微動を、目視により判断しな
ければならないことに問題があるのに着目してなされた
ものである。
According to the present invention, the tightening torque of a bolt is often measured in a narrow working environment in which a large number of pipes are disturbed, and is measured in an unnatural posture in a narrow and dim working space. This is done by paying attention to the fact that there is a problem in that the fine movement at the moment when the nut starts to rotate during the retightening must be visually determined.

【0008】すなわち、ボルト・ナット締め付け作業に
おける、ボルト締め付け後の増締めトルク計測方法であ
って、増締めに用いるトルクレンチ側に設けた触針と、
前記触針に対向して微小距離をおいて被締結体側に設置
される接触片とによるスイッチ回路を有する電気回路を
設定しておき、トルクレンチの締め付け操作による微動
回転を前記スイッチ回路の閉成によって捉え、電気変位
検出時のトルクを計測して検出するように構成して、上
記目的を達成したものである。
That is, in a bolt / nut tightening work, a method of measuring the tightening torque after tightening the bolt, wherein a stylus provided on the side of a torque wrench used for the tightening,
An electric circuit having a switch circuit with a contact piece installed on the side of the object to be fastened with a minute distance facing the stylus is set, and a fine movement rotation by a torque wrench tightening operation is performed to close the switch circuit. The above-mentioned object is achieved by the configuration in which the torque at the time of electric displacement detection is measured and detected.

【0009】[0009]

【作用】上記構成によれば、増締め時にはトルクレンチ
およびナット用ソケットの微動が発生する。この微動が
発生すると、被締結体に設置した着脱自在の電気式接触
片と、トルクレンチ自体またはナット用ソケットから伸
した針状の触針による電気的スイッチ回路が閉成され、
電気変位として検出することができる。これは例えばス
イッチ回路の閉成で発光するランプや、鳴動するブザー
を用いればよい。これによって増締めによる回転微動を
確実に高い精度で検出することができ、したがって増締
めトルクを高精度で計測できる。
According to the above construction, the torque wrench and the nut socket are slightly moved during the tightening. When this slight movement occurs, a detachable electric contact piece installed on the object to be fastened and the electric switch circuit by the needle-shaped stylus extending from the torque wrench itself or the nut socket are closed.
It can be detected as an electric displacement. For this, for example, a lamp that emits light when the switch circuit is closed or a buzzer that sounds is used. With this, it is possible to reliably detect the rotational fine movement due to the additional tightening with high accuracy, and thus it is possible to measure the additional tightening torque with high accuracy.

【0010】前記スイッチ回路を構成し被締結体に設置
される接触片は、被締結体への着脱を容易にかつ迅速に
するため、被締結体との磁着が可能になるように接触面
に磁石を取り付けている。使用する磁石の形状または長
方体状磁石を任意の位置に埋め込み固定したものであっ
てもよい。
The contact piece which constitutes the switch circuit and is installed on the object to be fastened has a contact surface so that it can be magnetically attached to the object to be fastened in order to easily and quickly attach and detach it to the object to be fastened. The magnet is attached to. The magnet to be used or a rectangular magnet may be embedded and fixed at an arbitrary position.

【0011】前記トルクレンチがデジタル表示式の場合
においては、電気式接触スイッチと、トルクレンチまた
はナット用ソケットから伸した針状の触針との、接触時
のトルク表示値がホールドされるような保持制御回路を
付加し、より計測誤差を低減できるようにすればよい。
また、発光体またはブザー等と併用することで、さらに
計測および締付精度を向上させることができる。
In the case where the torque wrench is a digital display type, the torque display value at the time of contact between the electric contact switch and the needle-like stylus extended from the torque wrench or the nut socket is held. A holding control circuit may be added so that the measurement error can be further reduced.
Further, by using together with a light emitting body or a buzzer, the measurement and tightening accuracy can be further improved.

【0012】[0012]

【実施例】以下、本発明に係るボルトの締め付けトルク
計測方法の具体的実施例を図面を参照して詳細に説明す
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the bolt tightening torque measuring method according to the present invention will be described in detail below with reference to the drawings.

【0013】図1は実施例に係るボルトの締め付けトル
ク計測方法による計測例を示す概略平面図であり、図2
は同じく実施例に係るボルトの締め付けトルク計測方法
の計測例を示す概略側面図である。
FIG. 1 is a schematic plan view showing an example of measurement by the bolt tightening torque measuring method according to the embodiment.
FIG. 6 is a schematic side view showing a measurement example of the bolt tightening torque measuring method according to the embodiment as well.

【0014】図1および図2のボルトの締め付けトルク
計測状態は、ボルト締め付け後の増締めトルク計測方法
の使用例を示したものである。これらの図に示すよう
に、計測作業に用いるトルクレンチ10は、この実施例
ではダイヤル式トルクレンチを用いており、トルク表示
部12には締め付けトルクの最大値に針表示が固定され
る置き針14が設けられている。トルクレンチ10の先
端部下面にはナットソケット16が設けられている。一
方、被締結体18は予めボルト20およびナット22に
よって予め締め付けられている。上記トルクレンチ10
はナットソケット16をナット22に装着し締め付け方
向に回転操作することで増締めをなすものである。
The bolt tightening torque measurement state shown in FIGS. 1 and 2 shows an example of using the method for measuring the tightening torque after tightening the bolt. As shown in these drawings, the torque wrench 10 used for the measurement work is a dial type torque wrench in this embodiment, and the torque indicator 12 is a stationary needle whose needle display is fixed to the maximum value of the tightening torque. 14 are provided. A nut socket 16 is provided on the lower surface of the tip of the torque wrench 10. On the other hand, the fastened body 18 is previously tightened with the bolt 20 and the nut 22. Torque wrench 10
Is for tightening by mounting the nut socket 16 on the nut 22 and rotating the nut socket 16 in the tightening direction.

【0015】このような構成において、増締めトルクを
計測するため、前記ナットソケット16の外面部には触
針24がレンチ長手方向に沿って突出されている。この
触針24はしたがってレンチ10を締め付け方向に回転
させることで、ナット回りにレンチ10と一体となって
同方向に回転される。また、このような触針24に対向
するように被締結体18側には接触片26が設置されて
いる。この接触片26は取付基台28に保持されてお
り、また取付基台28はその下面に設けた磁石プレート
30によって被締結体18に磁着固定されている。取付
基台28は、上記接触片26を、レンチ10側の触針2
4に対してその締め付け時の回転方向側に微小間隙をお
いて配置するように被締結体18に磁着される。これに
よってレンチ10側の触針24は増締め操作により回転
されたとき、被締結体18側に設置された接触片26に
接触することとなる。これによって触針24と接触片2
6によるスイッチ回路28が構成できる。
In such a structure, in order to measure the tightening torque, the stylus 24 is projected on the outer surface of the nut socket 16 along the longitudinal direction of the wrench. Therefore, by rotating the wrench 10 in the tightening direction, the stylus 24 is rotated integrally with the wrench 10 around the nut in the same direction. Further, a contact piece 26 is installed on the side of the fastened body 18 so as to face the stylus 24. The contact piece 26 is held by a mounting base 28, and the mounting base 28 is magnetically fixed to the fastened body 18 by a magnet plate 30 provided on the lower surface thereof. The mounting base 28 includes the contact piece 26 and the contact point 2 on the wrench 10 side.
4 is magnetically attached to the fastened body 18 so as to be disposed with a minute gap on the rotation direction side when tightening. As a result, the stylus 24 on the wrench 10 side comes into contact with the contact piece 26 installed on the side of the fastened body 18 when rotated by the tightening operation. As a result, the stylus 24 and the contact piece 2
A switch circuit 28 composed of 6 can be configured.

【0016】また、上記スイッチ回路28による閉成動
作の有無を判定するため電気回路が設定されており、実
施例では前記取付基台28に電池電源(図示せず)を内
蔵させ、上記スイッチ回路28の両接点24、26を接
続する配線32を設けて、スイッチ回路28の閉成時に
点灯するランプ34を含む点灯回路によって構成してい
る。したがって、トルクレンチ10による増締め操作で
触針24と接触片26の微小距離だけレンチ10が回転
すると、スイッチ回路28が閉成し、ランプ34が点灯
するものとなっている。
An electric circuit is set to determine whether or not the switch circuit 28 performs the closing operation. In the embodiment, a battery power source (not shown) is built in the mounting base 28, and the switch circuit is used. Wiring 32 for connecting both contacts 24, 26 of 28 is provided, and is constituted by a lighting circuit including a lamp 34 which is lit when the switch circuit 28 is closed. Therefore, when the wrench 10 is rotated by a small distance between the stylus 24 and the contact piece 26 by the tightening operation with the torque wrench 10, the switch circuit 28 is closed and the lamp 34 is turned on.

【0017】このように構成されたトルク計測手段によ
れば、被締結体18を締め付けた後のナット22へダイ
ヤル式トルクレンチ10のソケット16を取付ける。ソ
ケット16から伸した触針24と任意ギャップだけ離し
た位置に、接触片26を取付基台28を介して被締結体
18の表面に磁石プレート30で磁着する。締め付け方
向にダイヤル式トルクレンチ10に力を加え、ナット2
2が回り始めた瞬間、触針24と接触片26が接触して
スイッチ回路28が閉成し、点灯回路に電流が流れラン
プ34が点灯する。この時締め付け力を開放し、ダイヤ
ル式トルクレンチ10の置き針14を読み取り、締付ト
ルクの計測値とするものである。
According to the torque measuring means constructed as described above, the socket 16 of the dial type torque wrench 10 is attached to the nut 22 after the tightened body 18 is tightened. The contact piece 26 is magnetically attached to the surface of the body 18 to be fastened by the magnet plate 30 via the attachment base 28 at a position separated from the stylus 24 extended from the socket 16 by an arbitrary gap. Apply a force to the dial type torque wrench 10 in the tightening direction, and tighten the nut 2
At the moment when 2 starts to rotate, the stylus 24 and the contact piece 26 come into contact with each other, the switch circuit 28 is closed, and a current flows through the lighting circuit to light the lamp 34. At this time, the tightening force is released, the set needle 14 of the dial type torque wrench 10 is read, and the tightening torque is measured.

【0018】なお、上記実施例では検出時の表示方法と
してランプ34の点灯方式を採用したが、これはブザー
であってもよい。
In the above embodiment, the lighting method of the lamp 34 is adopted as the display method at the time of detection, but this may be a buzzer.

【0019】また、デジタル表示式のトルクレンチの場
合は、トルク表示値のホールド機能を付加することで、
より高精度の計測が可能になる。
Further, in the case of a digital display type torque wrench, by adding a hold function of the torque display value,
Higher precision measurement becomes possible.

【0020】なお、上記実施例では、増締めトルク計測
方法に関して解説したが、これは戻しトルク法、まはた
マーク法に対しても同様に適用可能である。
In the above embodiment, the method for measuring the tightening torque has been explained, but this can also be applied to the return torque method or the mark method.

【0021】[0021]

【発明の効果】以上説明したように、本発明に係るボル
トの締め付けトルク計測方法は、特に増締めに用いるト
ルクレンチ側に設けた触針と、前記触針に対向して微小
距離をおいて被締結体側に設置される接触片とによるス
イッチ回路を有する電気回路を設定しておき、トルクレ
ンチの締め付け操作による微動回転を前記スイッチ回路
の閉成によって捉え、電気変位検出時のトルクを計測し
て検出するように構成したので、いかなる作業環境の中
でも、ボルト・ナットの締め付けトルクを容易に、迅速
に、かつ高精度で計測することができるという効果が得
られる。
As described above, according to the bolt tightening torque measuring method of the present invention, the stylus provided on the side of the torque wrench used for the additional tightening and the stylus facing each other with a small distance therebetween. An electric circuit having a switch circuit with a contact piece installed on the fastened body side is set in advance, and fine movement rotation due to the tightening operation of the torque wrench is captured by closing the switch circuit, and the torque at the time of electric displacement detection is measured. Since it is configured to be detected by the above method, it is possible to easily, quickly, and highly accurately measure the tightening torque of the bolt / nut in any working environment.

【図面の簡単な説明】[Brief description of drawings]

【図1】実施例に係るボルトの締め付けトルク計測装置
の概略構成を示す平面図である。
FIG. 1 is a plan view showing a schematic configuration of a bolt tightening torque measuring device according to an embodiment.

【図2】同計測装置の概略側面図である。FIG. 2 is a schematic side view of the measuring device.

【符号の説明】[Explanation of symbols]

10 トルクレンチ 12 トルク表示部 14 置き針 16 ナットソケット 18 被締結体 20 ボルト 22 ナット 24 触針 26 接触片 28 スイッチ回路 30 磁石プレート 32 配線 34 ランプ 10 Torque Wrench 12 Torque Display Part 14 Placement Needle 16 Nut Socket 18 Fastened Object 20 Bolt 22 Nut 24 Stylus 26 Contact Piece 28 Switch Circuit 30 Magnet Plate 32 Wiring 34 Lamp

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ボルト・ナット締め付け作業における、
ボルト締め付け後の増締めトルク計測方法であって、増
締めに用いるトルクレンチ側に設けた触針と、前記触針
に対向して微小距離をおいて被締結体側に設置される接
触片とによるスイッチ回路を有する電気回路を設定して
おき、トルクレンチの締め付け操作による微動回転を前
記スイッチ回路の閉成によって捉え、電気変位検出時の
トルクを計測して検出することを特徴とするボルトの締
め付けトルク計測方法。
1. In bolt and nut tightening work,
A method for measuring the tightening torque after tightening a bolt, comprising: a stylus provided on the side of a torque wrench used for the tightening and a contact piece facing the stylus and provided on the side of the body to be fastened with a minute distance. An electric circuit having a switch circuit is set, and fine movement rotation caused by a tightening operation of a torque wrench is detected by closing the switch circuit, and the torque at the time of electric displacement detection is measured and detected. Torque measurement method.
JP5172398A 1993-06-18 1993-06-18 Bolt fastening torque measuring method Pending JPH071264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5172398A JPH071264A (en) 1993-06-18 1993-06-18 Bolt fastening torque measuring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5172398A JPH071264A (en) 1993-06-18 1993-06-18 Bolt fastening torque measuring method

Publications (1)

Publication Number Publication Date
JPH071264A true JPH071264A (en) 1995-01-06

Family

ID=15941206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5172398A Pending JPH071264A (en) 1993-06-18 1993-06-18 Bolt fastening torque measuring method

Country Status (1)

Country Link
JP (1) JPH071264A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020033132A (en) * 2002-03-25 2002-05-04 백수곤 Bolt Tensioning and Torque Measuring System

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020033132A (en) * 2002-03-25 2002-05-04 백수곤 Bolt Tensioning and Torque Measuring System

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