JP2002239939A - Tightening torque controller for bolt - Google Patents
Tightening torque controller for boltInfo
- Publication number
- JP2002239939A JP2002239939A JP2001041176A JP2001041176A JP2002239939A JP 2002239939 A JP2002239939 A JP 2002239939A JP 2001041176 A JP2001041176 A JP 2001041176A JP 2001041176 A JP2001041176 A JP 2001041176A JP 2002239939 A JP2002239939 A JP 2002239939A
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- tightening
- torque
- personal computer
- value
- 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
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Landscapes
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は手動式トルクレンチ
を用いて、各所のボルトを所望の締付けトルクで締付け
作業を行うことのできるボルトの締付けトルク管理装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt tightening torque management device capable of tightening bolts at various locations with a desired tightening torque using a manual torque wrench.
【0002】[0002]
【従来の技術】電気機器、特に遮断器、変圧器やキュー
ビクルにおいては、その接続箇所毎に様々な材質・径を
有するボルトが使用されている。これらのボルトの締付
けは、従来、ボルト現品とマニュアルを作業者が照合
し、個々のボルトに応じてトルクレンチの締付けトルク
値を手動で作業者が設定して行っている。2. Description of the Related Art In electrical equipment, in particular, circuit breakers, transformers, and cubicles, bolts having various materials and diameters are used for each connection point. Conventionally, the bolts are tightened by the operator by checking the actual bolt and the manual, and manually setting the tightening torque value of the torque wrench according to each bolt.
【0003】また、図1に示すように、トルクレンチ2
0の締付けトルクが所定値に達したことを送受信器21
を用いて判定装置22に送信し、判定装置22において
それぞれのボルト3の締付けトルクが所定の値に達した
ことを判定するシステムが提案されている。[0003] Further, as shown in FIG.
The transmitter / receiver 21 notifies that the tightening torque of 0 has reached the predetermined value.
Is transmitted to the determination device 22 using the control device, and the determination device 22 determines that the tightening torque of each bolt 3 has reached a predetermined value.
【0004】[0004]
【発明が解決しようとする課題】従来技術にあっては、
作業者が個々のボルトに規定されている締付けトルク値
を作業マニュアルから検索して、トルクレンチの設定値
を調整しなければならないという問題がある。特に、発
・変電所内で締付けトルクを管理しなければならないボ
ルト類は多岐にわたり、それぞれの箇所のボルトの規定
値をマニュアルを参照してから設定する作業は非常に煩
雑なものとなる。In the prior art,
There is a problem that an operator has to search a tightening torque value specified for each bolt from an operation manual and adjust a set value of the torque wrench. In particular, there is a wide variety of bolts for which the tightening torque must be controlled in the substation and substation, and it is very complicated to set the prescribed values of the bolts at each location after referring to the manual.
【0005】本発明の目的は、各種ボルトの締付けトル
クの設定が簡単に行えるボルトの締付けトルク管理装置
を提案することにある。It is an object of the present invention to propose a bolt tightening torque management device which can easily set various bolt tightening torques.
【0006】[0006]
【課題を解決するための手段】本発明は、締付け作業を
行われるボルトの近傍に付加され、ボルトの管理番号を
識別するための識別子と、ボルトの管理番号毎に締付け
トルク設定値のデータを保持し、送受信可能な携帯型演
算装置と、識別子を読込みボルトの管理番号を携帯型演
算装置に送信して当該ボルトの締付けトルク設定値を取
込んで表示して設定され、取込んだ締付けトルク設定値
でボルトの締付け作業に用いられる手動式トルクレンチ
によって構成される。SUMMARY OF THE INVENTION According to the present invention, there is provided an identifier for identifying a control number of a bolt, which is added near a bolt to be tightened, and data of a set torque value for each bolt control number. The portable computing device that can be held and transmitted and received, the identifier is read, the management number of the bolt is transmitted to the portable computing device, the tightening torque set value of the bolt is captured and displayed, and the set tightening torque is set. It is constituted by a manual torque wrench used for bolt tightening work at a set value.
【0007】本発明は、電気機器の接続箇所に使用され
ているボルトに対して管理番号をつけ、この管理番号に
よって締付け対象となるボルトを管理する。この管理番
号はバーコード化(識別子)して、電気機器の本体、あ
るいはボルト、マニュアルに添付される。According to the present invention, a management number is assigned to a bolt used at a connection portion of an electric device, and the bolt to be tightened is managed by the management number. This management number is converted into a bar code (identifier) and attached to the main body of the electric device, a bolt, or a manual.
【0008】一方、トルクレンチは、このバーコードを
認識できる光学センサを有し、バーコードが持つ情報
は、光学センサによって読み込まれ、トルクレンチに備
え付けた通信器を介してハンディタイプパソコン(携帯
型演算装置)に転送される。パソコンは受信した信号か
らボルトの管理番号を認識し、管理番号をもとに締付け
対象機器名、箇所、ボルト員数、作業手順、ボルト材
質、径、規定トルク値をデータベースから自動的に検索
し、その情報をパソコンの画面上に表示するとともに、
待機状態となる。On the other hand, the torque wrench has an optical sensor capable of recognizing the bar code, and information contained in the bar code is read by the optical sensor, and the information is stored in a hand-held personal computer (portable type) via a communication device provided in the torque wrench. Calculation device). The PC recognizes the control number of the bolt from the received signal, and automatically searches the database for the tightening target device name, location, number of bolts, work procedure, bolt material, diameter, and specified torque value based on the control number. The information is displayed on the computer screen,
It goes into a standby state.
【0009】作業者は、パソコンの規定トルク値の情報
をもとに、締付けトルクの設定値を手動で調整する。ト
ルクレンチの設定がパソコン画面上の規定値と等しくな
った条件にて、作業者は締付作業を手順に従い実施す
る。これにより、本発明は、作業者によるボルト現品と
マニュアルの照合といった手順を簡略化し、締付けにか
かわる作業の効率化とトルク値の設定間違いといった人
為的なミスを排除するものとなる。The operator manually adjusts the set value of the tightening torque based on the information on the prescribed torque value of the personal computer. Under the condition that the setting of the torque wrench becomes equal to the specified value on the personal computer screen, the operator performs the tightening work according to the procedure. As a result, the present invention simplifies the procedure of checking the actual bolt and the manual by the operator, and eliminates human errors such as efficiency in tightening work and incorrect setting of the torque value.
【0010】[0010]
【発明の実施の形態】本発明の一実施例を図2〜4を用
いて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.
【0011】トルクレンチ1は、本体部分をチタンある
いは鋼で形成し、その握り部分9は絶縁ゴムによって被
覆される構成である。ヘッド装着部分10は、ボルトサ
イズM4からM36用のヘッドを固定できる構造であ
り、締付けトルク範囲を1.0から1200(N・m)
までカバーできる機能を有する。The torque wrench 1 has a body portion formed of titanium or steel, and a grip portion 9 covered with insulating rubber. The head mounting portion 10 has a structure capable of fixing a head for bolt sizes M4 to M36, and has a tightening torque range of 1.0 to 1200 (N · m).
Has a function that can cover up to
【0012】また、トルクレンチ1は、締付けトルク値
の設定を手動で行い、締付け規定値は、通信器2,4を
介してパソコン5の画面上で確認できる機能をもつ。更
に、トルクレンチ1は、リミットスイッチ11を内蔵し
ており、設定値による締付け完了によってこのリミット
スイッチが機能する。Further, the torque wrench 1 has a function of manually setting a tightening torque value and confirming the specified tightening value on the screen of the personal computer 5 via the communication devices 2 and 4. Further, the torque wrench 1 has a built-in limit switch 11, and the limit switch functions when tightening is completed by a set value.
【0013】トルクレンチ1には、締付トルクの設定が
未完了のとき点灯するLEDランプ13、トルク設定値
による締付け作業が完了したことを示すLEDランプ1
5と締付け作業が未完了であることを告知するLEDラ
ンプ14の3つの表示機能を有する。The torque wrench 1 has an LED lamp 13 which is turned on when the setting of the tightening torque is not completed, and an LED lamp 1 which indicates that the tightening operation based on the torque set value is completed.
5 and an LED lamp 14 for notifying that the tightening operation is not completed.
【0014】パソコン5の画面7に従い、作業者は手動
で締付トルク値を設定し、設定完了にて表示LEDラン
プ13が消灯する。設定値による締付けが未完了の間
は、トルクレンチ側面図4に配置されている3個のLE
Dランプのうち、締付け未完了を意味するランプ14が
点灯し続け、作業者に締付け不足であることを知らしめ
る。トルク設定値による締付けが完了した時、LEDラ
ンプのうち、締付け完了を知らせるランプ15が初めて
点灯する。トルクレンチ1は、握り手部分に、通信器2
を接続するためのプラグ12を持ち、これにより信号を
伝送する。According to the screen 7 of the personal computer 5, the operator manually sets the tightening torque value, and when the setting is completed, the display LED lamp 13 turns off. While the tightening by the set value is not completed, the three LEs arranged on the torque wrench side view 4
Of the D lamps, the lamp 14 indicating that the tightening is not completed continues to light to inform the operator that the tightening is insufficient. When the tightening based on the torque setting value is completed, the lamp 15 that notifies the completion of the tightening among the LED lamps is turned on for the first time. The torque wrench 1 has a communication device 2
Has a plug 12 for connecting the signal, and thereby a signal is transmitted.
【0015】通信器2、4は、トルクレンチ1からハン
ディタイプのパソコン5への信号と、ハンディタイプパ
ソコン5からトルクレンチ1に送られる信号の双方向の
伝送ができる機能を有する。トルクレンチ1側の通信器
2の電源はトルクレンチ1に内蔵した電池により供給さ
れ、ハンディタイプのパソコン5側に配置される通信器
4の電源はハンディタイプのパソコン5本体から供給さ
れる。The communicators 2 and 4 have a function of enabling bidirectional transmission of a signal from the torque wrench 1 to the handy type personal computer 5 and a signal sent from the handy type personal computer 5 to the torque wrench 1. The power of the communication device 2 on the side of the torque wrench 1 is supplied by a battery built in the torque wrench 1, and the power of the communication device 4 disposed on the side of the handy type personal computer 5 is supplied from the main body of the handy type personal computer 5.
【0016】通信器2、4は、本体に無線による伝送を
可能とするアンテナ18と、有線による伝送を可能とす
るプラグ12を有し、そのいずれかの伝送路と使用して
トルクレンチ側の通信器2とハンディタイプパソコン側
の通信器4の情報が交換される。The communicators 2 and 4 each have an antenna 18 for enabling wireless transmission and a plug 12 for enabling wired transmission on the main body. Information is exchanged between the communication device 2 and the communication device 4 on the handy type personal computer side.
【0017】識別子としてのバーコード6は、ボルト3
の管理番号を意味するものであり、裏面が糊付けしてあ
るため、電気機器本体や電気機器のマニュアルに貼り付
けることができ、電気設備・ボルトの種類によって異な
る情報をもつ。バーコード6の持つ管理番号は、トルク
レンチ1の底面に装備された光学センサ8によって読取
られ、上述の2台の通信器2,4を介してハンディタイ
プパソコン5に送られる。The bar code 6 as an identifier is a bolt 3
Since the back surface is glued, it can be attached to the main body of the electric device or the manual of the electric device, and has different information depending on the type of electric equipment and bolt. The management number of the bar code 6 is read by an optical sensor 8 provided on the bottom surface of the torque wrench 1 and sent to the handy type personal computer 5 via the two communication devices 2 and 4 described above.
【0018】ハンディタイプのパソコン5は、作業服の
ポケットに収納できるよう小型・軽量であり、持ち運び
の際、他の工具による破損も考えられるため、アルミ製
の収納カバーを付属する。ハンディタイプのパソコン5
は、長時間の使用が考えられるため、ACアダプタを介
した電源とバッテリーによる電源の2種類の方法で駆動
できる機能がある。The handy type personal computer 5 is small and lightweight so that it can be stored in a pocket of work clothes, and may be damaged by other tools when being carried. Therefore, an aluminum storage cover is attached. Handy type personal computer 5
Has a function that can be driven by two kinds of methods, a power supply through an AC adapter and a power supply by a battery, since it can be used for a long time.
【0019】ハンディタイプのパソコン5には、予め、
ボルトの管理番号のデータとボルト締付け対象の機器の
名称、締付け箇所の略図、ボルト員数、作業手順、ボル
ト材質、径、規定トルク値をデータとして貯えておく。
これらのデータは、ボルトの管理番号によって検索でき
る仕組みになっている。In the handy type personal computer 5,
The data of the bolt management number, the name of the equipment to be bolted, the schematic diagram of the tightening location, the number of bolts, the work procedure, the bolt material, the diameter, and the specified torque value are stored as data.
These data can be searched by the management number of the bolt.
【0020】本発明では、従来、ボルト締付け作業者が
実施していた、ボルト現品とマニュアルの照合と、トル
クレンチ1の設定作業を容易に、且つ確実に実行でき
る。According to the present invention, it is possible to easily and reliably execute the collation of the actual bolt with the manual and the setting work of the torque wrench 1, which were conventionally performed by the bolt tightening operator.
【0021】ボルト締付け作業者は、トルクレンチ1の
光学センサ8を使って、ボルト3の管理番号を意味する
バーコード6を読取る。この情報は、2台の通信器2,
4を介して、ハンディタイプのパソコン5に伝送され
る。The bolt tightening operator uses the optical sensor 8 of the torque wrench 1 to read the bar code 6 indicating the management number of the bolt 3. This information is stored in two communicators 2,
4 to a hand-held type personal computer 5.
【0022】ハンディタイプのパソコン5では、受信し
た信号からボルトの管理番号を認識し、予めデータベー
ス化しておいた情報の中から、認識したボルト3に関す
る情報を検索し、その結果をハンディタイプパソコン5
の画面7に表示させる。画面に表示させる情報は、ボル
ト3の管理番号とボルト締付け対象の機器の名称、締付
け箇所の略図、ボルト員数、作業手順、ボルト材質、
径、規定トルク値である。The handy type personal computer 5 recognizes the control number of the volt from the received signal, searches the information stored in the database in advance for information on the recognized volt 3, and outputs the result to the handy type personal computer 5.
Is displayed on the screen 7. The information to be displayed on the screen includes the control number of the bolt 3, the name of the equipment to be bolted, a schematic diagram of the tightening location, the number of bolts, the work procedure, the bolt material,
Diameter and specified torque value.
【0023】締付け未完了の状態では、ボルト3の表記
が白抜きで表示してあり、作業者に作業未完了であるこ
とを告知する。また、これらの画面表示とあわせてハン
ディタイプのパソコン5は、トルクレンチ1が規定のト
ルク値設定ができているかを判定し、設定未完の間、ト
ルクレンチ1の表示ランプ13を点灯させる。In the state where the tightening is not completed, the notation of the bolt 3 is displayed in white and the operator is notified that the work is not completed. In addition to these screen displays, the handy type personal computer 5 determines whether the torque wrench 1 has set a specified torque value, and turns on the display lamp 13 of the torque wrench 1 while the setting is not completed.
【0024】トルクレンチ1は現状の締付けトルク設定
値をハンディタイプのパソコン5に送信し、規定値との
比較はハンディタイプのパソコン5にて行われる。設定
値がパソコン画面7の規定値と等しくなったとき、パソ
コン5からトルクレンチ1に向け、設定完了の信号が発
信され、これを受けてトルクレンチ1の表示ランプ13
は消灯する。このランプ消灯により作業者はトルクレン
チ1の準備が完了したことを認識し、締付け作業を実施
する。The torque wrench 1 transmits the current setting value of the tightening torque to the hand-held type personal computer 5, and the comparison with the specified value is performed by the hand-held type personal computer 5. When the set value becomes equal to the specified value on the personal computer screen 7, a signal indicating the completion of the setting is transmitted from the personal computer 5 to the torque wrench 1.
Turns off. By turning off the lamp, the worker recognizes that the preparation of the torque wrench 1 is completed, and performs the tightening work.
【0025】本発明は、暗所・騒音下でのボルト締付け
作業を確実に実施できる。騒音・暗所といった悪環境下
での作業においては、従来のリミットスイッチ動作時の
音あるいは感覚だけでは締付け作業の完了、未完了の判
断が極めて難しい。そのため、ボルトの締付け完了・未
完了を告知するランプを表示することで、作業者はボル
ト締付けを確実に実施することができる。According to the present invention, a bolt tightening operation in a dark place and under noise can be reliably performed. In work in a bad environment such as noise and dark place, it is extremely difficult to judge whether or not the tightening work is completed or not completed only by the sound or feeling at the time of the conventional limit switch operation. For this reason, by displaying a lamp that notifies completion or incomplete completion of bolt tightening, the operator can surely perform bolt tightening.
【0026】本発明は、ボルト締付け作業における締め
忘れ、締付け不良を撲滅することができる。一つ一つの
ボルト3の締付けを表示ランプ15によって認識できる
とともに、ハンディタイプのパソコン5の画面7の指示
に沿った手順でボルト3を締め付けることにより、自動
的に画面のボルト表記が更新し、締付けの完了したボル
トは色塗りと締付け未完了のボルトは白抜きのままとな
るので同画面上で現在の締付け本数、締付け手順が確認
できる。According to the present invention, it is possible to eliminate forgetting to tighten the bolts and improper tightening. The tightening of each bolt 3 can be recognized by the display lamp 15 and the bolt 3 on the screen is automatically updated by tightening the bolt 3 according to the instruction on the screen 7 of the handy type personal computer 5, The bolts that have been tightened are colored and the bolts that have not been tightened are left blank, so the current number of tightened bolts and the tightening procedure can be checked on the same screen.
【0027】本発明は、ボルト締付け作業の実際の作業
データを貯えることができる。実作業において、ボルト
3の締付けが完了するごとに、ボルト3の管理番号及び
締付け手順、締付けトルク設定値のデータはハンディタ
イプのパソコン5の中で保存される。According to the present invention, actual operation data of the bolt tightening operation can be stored. In the actual work, every time the tightening of the bolt 3 is completed, the management number of the bolt 3, the tightening procedure, and the data of the tightening torque setting value are stored in the handy type personal computer 5.
【0028】したがって、作業終了後にこのデータをも
とに作業報告書を作成することができ、ボルト締付け作
業の信頼性を向上することができる。図5に作業報告書
の例を示す。Therefore, a work report can be created based on this data after the work is completed, and the reliability of the bolt tightening work can be improved. FIG. 5 shows an example of the work report.
【0029】なお、本発明は、騒音・暗所といった悪環
境下での締付け作業完了の確認手段として、トルクレン
チ本体に締付け完了・不完全を意味する表示を付加する
ことにより、ボルト締付けにおける作業の効率化を計
り、締付け作業における人為的なミスの低減を計ること
にある。According to the present invention, as a means for confirming the completion of the tightening operation in a bad environment such as a noise or a dark place, an indication indicating the completion or incompleteness of the tightening is added to the torque wrench main body, so that the bolt tightening operation can be performed. The purpose of the present invention is to improve the efficiency of the work and reduce the human error in the tightening work.
【0030】また、騒音・暗所などの悪環境下でも締付
け作業が完全に実施できるよう考慮した。トルクレンチ
に規定トルク値での締付け作業の完了・未完了をあらわ
すランプ表示を備え付け、トルク締付け作業の進行具合
を作業者に視覚的に訴える手段を提供する。Further, it has been considered that the tightening operation can be completely performed even in a bad environment such as a noise or a dark place. A torque wrench is provided with a lamp display indicating completion / non-completion of a tightening operation at a specified torque value, thereby providing a means for visually appealing to an operator of the progress of the torque tightening operation.
【0031】[0031]
【発明の効果】本発明は、ボルト締付けの作業の効率化
及び人為的なミスの低減を計ることにある。The object of the present invention is to improve the efficiency of bolt tightening work and reduce human error.
【図1】従来技術のトルクレンチ管理システムの概要
図。FIG. 1 is a schematic diagram of a conventional torque wrench management system.
【図2】本発明のトルク管理システムの全体構造を示す
概要図。FIG. 2 is a schematic diagram showing the overall structure of a torque management system according to the present invention.
【図3】本発明のトルクレンチ構造を示す平面図。FIG. 3 is a plan view showing a torque wrench structure of the present invention.
【図4】本発明のトルクレンチ構造を示す側面図。FIG. 4 is a side view showing the torque wrench structure of the present invention.
【図5】本発明により作成した作業報告書の例。FIG. 5 is an example of a work report created according to the present invention.
1 手動式トルクレンチ 2 通信器 3 ボルト 5 ハンディタイプのパソコン 6 バーコード DESCRIPTION OF SYMBOLS 1 Manual torque wrench 2 Communication device 3 Bolt 5 Handy type personal computer 6 Bar code
Claims (2)
トの近傍に付加され、前記ボルトの管理番号を識別する
ための識別子と、前記ボルトの管理番号毎に締付けトル
ク設定値のデータを保持し、送受信可能な携帯型演算装
置と、前記識別子を読込み前記ボルトの管理番号を前記
携帯型演算装置に送信して当該ボルトの締付けトルク設
定値を取込んで表示して設定され、取込んだ前記締付け
トルク設定値で前記ボルトの締付け作業に用いられる手
動式トルクレンチとを具備することを特徴とするボルト
の締付けトルク管理装置。1. A bolt to be tightened, an identifier added near the bolt for identifying a control number of the bolt, and data of a set torque value for each bolt control number. The portable computing device capable of transmission and reception, the identifier is read, the management number of the bolt is transmitted to the portable computing device, the tightening torque set value of the bolt is captured and displayed, and the setting is performed. A manual torque wrench used for tightening the bolt with a set tightening torque value.
トの近傍に付加され、前記ボルトの管理番号を識別する
ためのバーコードと、前記ボルトの管理番号毎に締付け
トルク設定値のデータを格納し、送受信可能なハンディ
タイプパソコンと、前記バーコードを読込み前記ボルト
の管理番号を前記ハンディタイプパソコンに送信して当
該ボルトの締付けトルク設定値を取込んで表示して設定
されると共に前記締付けトルク設定値の設定完了を表示
し、取込んだ前記締付けトルク設定値で前記ボルトの締
付け作業に用いられる手動式トルクレンチとを具備する
ことを特徴とするボルトの締付けトルク管理装置。2. A bolt to be tightened, a bar code added near the bolt for identifying a control number of the bolt, and data of a set torque value for each bolt control number are stored. A handy type personal computer capable of transmitting and receiving, reading the bar code, transmitting the control number of the bolt to the handy type personal computer, capturing and displaying a set value of a tightening torque of the bolt, and setting and setting the tightening torque. A manual torque wrench for displaying the completion of setting of the set value and using the received set value of the tightening torque for tightening the bolt.
Priority Applications (1)
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JP2001041176A JP2002239939A (en) | 2001-02-19 | 2001-02-19 | Tightening torque controller for bolt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001041176A JP2002239939A (en) | 2001-02-19 | 2001-02-19 | Tightening torque controller for bolt |
Publications (1)
Publication Number | Publication Date |
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JP2002239939A true JP2002239939A (en) | 2002-08-28 |
Family
ID=18903656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001041176A Pending JP2002239939A (en) | 2001-02-19 | 2001-02-19 | Tightening torque controller for bolt |
Country Status (1)
Country | Link |
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JP (1) | JP2002239939A (en) |
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US6990866B2 (en) | 2001-01-29 | 2006-01-31 | Innovation Plus, Llc | Load indicating member with identifying mark |
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US7441462B2 (en) | 2001-01-29 | 2008-10-28 | Innovation Plus, Llc | Load indicating member with identifying element |
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