JP2013215884A - Impact tightening tool with angle detection - Google Patents

Impact tightening tool with angle detection Download PDF

Info

Publication number
JP2013215884A
JP2013215884A JP2013117867A JP2013117867A JP2013215884A JP 2013215884 A JP2013215884 A JP 2013215884A JP 2013117867 A JP2013117867 A JP 2013117867A JP 2013117867 A JP2013117867 A JP 2013117867A JP 2013215884 A JP2013215884 A JP 2013215884A
Authority
JP
Japan
Prior art keywords
tightening
torque
angle
impact
magnetic
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.)
Granted
Application number
JP2013117867A
Other languages
Japanese (ja)
Other versions
JP5564711B2 (en
Inventor
Eiichi Wada
栄一 和田
Kenichi Mitsuda
建一 満田
Hisanori Nakamura
尚範 中村
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.)
Toyota Motor Corp
Yokota Industrial Co Ltd
Original Assignee
Toyota Motor Corp
Yokota Industrial Co 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 Toyota Motor Corp, Yokota Industrial Co Ltd filed Critical Toyota Motor Corp
Priority to JP2013117867A priority Critical patent/JP5564711B2/en
Publication of JP2013215884A publication Critical patent/JP2013215884A/en
Application granted granted Critical
Publication of JP5564711B2 publication Critical patent/JP5564711B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an impact tightening tool with an angle detection, including a structure that is superior in strength and achieves miniaturization.SOLUTION: An impact tightening tool is provided for converting rotational force of a rotary driving source into intermittent impact by an impact generating unit P to tighten a screw member by the rotational force of a main shaft S provided by the impact force. The impact tightening tool with an angle detection includes a torque detection means 10 for detecting a tightening torque, and an angle detection means 20 rotating integrally with the main shaft S and detecting a rotation angle. The angle detection means 20 is a magnetic encoder including a magnetic rotation drum 21 with multipole magnetization provided in the peripheral surface and having magnetic poles of N pole and S pole disposed alternately, and a magnetic sensor 23 disposed opposite the peripheral surface of the magnetic rotation drum 21 and comprising a thin film magnetoresistive element for detecting the change of the magnetic field of the magnetic rotation drum. The angle detection means is housed in a conical tapering case tip end part C of the impact tightening tool.

Description

この発明はボルトやナット等に衝撃を与えて締付を行う衝撃締付工具、とりわけ角度検知付の衝撃締付工具に関する。   The present invention relates to an impact tightening tool for tightening by applying an impact to a bolt, a nut or the like, and more particularly to an impact tightening tool with angle detection.

従来、ボルトやナット等の締付角度を検知する角度検知手段を備えた衝撃締付工具が存在する。   2. Description of the Related Art Conventionally, there is an impact tightening tool provided with an angle detection means for detecting a tightening angle of a bolt or nut.

例えば、特許文献１（特公平３−１９０３５）に示すように、角度検知手段として光学式のエンコーダを備えたものが存在する。これは、エアモータの出力軸の打撃後の反動回転量を検出する反動回転量検知手段として、エアモータの出力軸に直結された回転ディスクと、位相差をもたせて配設された一対のフォトインタラプター（発光素子と受光素子）とからなる光学式のロータリーエンコーダであり、回転ディスクはその周方向（径方向）に沿って多数のスリットが穿設されている（特許文献１第５欄第１０行〜３８行）。   For example, as shown in Patent Document 1 (Japanese Patent Publication No. 3-19035), there is one provided with an optical encoder as an angle detection means. This is a reaction rotation amount detecting means for detecting the reaction rotation amount after striking the output shaft of the air motor, and a pair of photo interrupters disposed with a phase difference and a rotating disk directly connected to the output shaft of the air motor. This is an optical rotary encoder composed of (light emitting element and light receiving element), and the rotating disk has a large number of slits along the circumferential direction (radial direction) (Patent Document 1, column 5, line 10). ~ 38 lines).

このように、多数のスリットが穿設された回転ディスクの場合、スリットの穿設によって部材が脆弱化するため、衝撃締付工具による衝撃に起因して破損し易く、また、回転ディスクの周方向（径方向）に沿ってスリットが穿設されるため（特許文献１、第２図等参照）、回転ディスクが外径方向に大きくならざるを得ない結果、打撃工具の小型化を阻害すると共に使用時の作業性に悪影響を及ぼすものである。更には、多数のスリットに油分や異物等が付着し易く、分解能に影響が生じる結果、誤作動を招きかねない等の問題も無視できない。   In this way, in the case of a rotating disk having a large number of slits, the member becomes weak due to the slits being drilled. Therefore, the rotating disk easily breaks due to the impact of the impact tightening tool. Since the slit is drilled along the (radial direction) (see Patent Document 1, FIG. 2, etc.), the rotating disk must be increased in the outer radial direction, and as a result, downsizing of the impact tool is hindered. It adversely affects workability during use. Furthermore, problems such as the possibility of oil malfunction or foreign matter adhering to a large number of slits, resulting in an influence on the resolution, resulting in malfunctions cannot be ignored.

また、特許文献２（特公平６−１６９９０）に示すように、角度検知手段として回転歯車式のものが存在する。これは、エアモータの回転軸に沿って設けられた歯車と、歯車の外周面に対向して設けられた回転検出センサからなるものである。   Further, as shown in Patent Document 2 (Japanese Patent Publication No. 6-16990), there is a rotary gear type as an angle detection means. This consists of a gear provided along the rotation axis of the air motor and a rotation detection sensor provided facing the outer peripheral surface of the gear.

このような場合、外周面に凹凸歯車を形成することから外径方向に大きくなる傾向があり、微細な凹凸の刻設が難しく分解能が粗くなるという問題がある。また、回転検出センサの内部にコイルが捲かれているため、回転検出センサ自体が大きくなり、打撃工具の小型化を阻害すると共に使用時の作業性に悪影響を及ぼすという問題もある。   In such a case, since the concave and convex gears are formed on the outer peripheral surface, the outer diameter tends to increase, and there is a problem that it is difficult to engrave fine irregularities and the resolution becomes rough. In addition, since the coil is wound inside the rotation detection sensor, the rotation detection sensor itself becomes large, which hinders downsizing of the impact tool and adversely affects workability during use.

また、角度検知手段としてレゾルバを用いることも考えられるが、ステータとロータにそれぞれコイルを捲いた構造であるため、構造が複雑であって高コストであるばかりか、外形が大きくなるため、打撃工具の小型化を阻害すると共に使用時の作業性に悪影響を及ぼすという問題がある。
特公平３−１９０３５ 特公平６−１６９９０ It is also possible to use a resolver as the angle detection means. However, since the stator and the rotor are coiled, the structure is complicated and expensive, and the outer shape becomes large. This hinders downsizing of the printer and adversely affects workability during use.
3-19035 JP 6-16990

そこで、本発明の課題は、強度的に優れると共に小型化が図れる構造を備えた角度検知付き衝撃締付工具を提供することである。   Therefore, an object of the present invention is to provide an impact fastening tool with angle detection having a structure that is excellent in strength and can be downsized.

本発明は、回転駆動源の回転力を衝撃発生装置によって間欠的な衝撃に変換し、前記衝撃力によって付与されるメインシャフトの回転力によりネジ部材を締め付ける衝撃締付工具であって、締め付けトルクを検知するトルク検知手段と、メインシャフトと一体的に回転して回転角度を検知する角度検知手段とを備え、前記角度検知手段は、周面に多極着磁が設けられ、Ｎ極とＳ極の磁極が交互に配置された磁気回転ドラムと、該磁気回転ドラムの周面に対向配置され、該磁気回転ドラムの磁界の変化を検出する薄膜磁気抵抗効果素子からなる磁気センサとを備えた磁気エンコーダであるものとして、前記衝撃締付工具の円錐状で先細りのケース先端部内に収容されていることを特徴とする、角度検知付き衝撃締付工具である（請求項１）。   The present invention relates to an impact tightening tool for converting a rotational force of a rotational drive source into an intermittent impact by an impact generating device, and tightening a screw member by a rotational force of a main shaft applied by the impact force, the tightening torque Torque detecting means for detecting the rotation angle, and angle detecting means for detecting the rotation angle by rotating integrally with the main shaft, the angle detecting means is provided with multipolar magnetization on the peripheral surface, and N pole and S pole A magnetic rotating drum in which magnetic poles of poles are alternately arranged, and a magnetic sensor made of a thin film magnetoresistive effect element that is arranged to face the peripheral surface of the magnetic rotating drum and detects a change in the magnetic field of the magnetic rotating drum. An impact tightening tool with angle detection, characterized in that it is housed in a conical and tapered case tip of the impact tightening tool as a magnetic encoder (Claim 1).

また、本発明は、複数の設定トルクを設けると共に、それらに対応する複数の許容締付角度範囲を設けることにより、前記トルク検知手段および前記角度検知手段によって異常締付を検知することを特徴とする、請求項１に記載の角度検知付き衝撃締付工具である（請求項２）。   In addition, the present invention is characterized in that abnormal tightening is detected by the torque detecting means and the angle detecting means by providing a plurality of set torques and providing a plurality of allowable tightening angle ranges corresponding thereto. The impact fastening tool with angle detection according to claim 1 (claim 2).

また、本発明は、前記トルク検知手段が第１設定トルクであるスタートトルクを検知したときに前記角度検知手段が検知した締付角度が第１許容範囲内にあるか否かを判定し、前記トルク検知手段が第２設定トルクであるスナグトルクを検知したときに前記角度検知手段が検知した締付角度が第２許容範囲内にあるか否かを判定し、前記トルク検知手段が第３設定トルクである狙い目トルクを検知したときに前記角度検知手段が検知した締付角度が第３許容範囲内にあるか否かを判定することを特徴とする、請求項１に記載の角度検知付き衝撃締付工具である（請求項３）。   Further, the present invention determines whether or not the tightening angle detected by the angle detection means is within a first allowable range when the torque detection means detects a start torque that is a first set torque. It is determined whether or not the tightening angle detected by the angle detection unit is within a second allowable range when the torque detection unit detects a snag torque that is a second set torque, and the torque detection unit detects the third set torque. The impact with angle detection according to claim 1, wherein it is determined whether or not the tightening angle detected by the angle detection means is within a third allowable range when a target eye torque is detected. A tightening tool (claim 3).

また、本発明は、前記全てのステップにおける締付角度が許容範囲内にある場合に正常な締付作業と認定し、いずれかのステップにおいて締付角度が許容範囲を逸脱する場合に異常の締付作業と認定し、さらに最終締付トルクがトルク合格範囲内から逸脱する場合は正常締付とは認定しないことを特徴とする、請求項３に記載の角度検知付き衝撃締付工具である（請求項４）。   In addition, the present invention recognizes that the tightening angle is normal when all the steps are within the allowable range, and abnormal tightening occurs when the tightening angle deviates from the allowable range at any step. The impact tightening tool with angle detection according to claim 3, characterized in that it is recognized as attaching work, and when the final tightening torque deviates from within the torque acceptance range, normal tightening is not recognized. Claim 4).

本発明のように、周面に多極着磁が設けられ、Ｎ極とＳ極の磁極が交互に配置された磁気回転ドラムと、該磁気回転ドラムの周面に対向配置され、該磁気回転ドラムの磁界を検出する薄膜磁気抵抗効果素子からなる磁気センサとを備えた磁気エンコーダであれば、上記した多数のスリットが穿設された回転ディスクを用いる光学式のエンコーダに比較して強度的に優れると共に工具の小型化が図れるため使用時の作業性が向上する。   As in the present invention, a magnetic rotating drum in which multipolar magnetization is provided on the peripheral surface, and magnetic poles of N and S poles are alternately disposed, and the magnetic rotating drum is disposed so as to face the peripheral surface of the magnetic rotating drum. If the magnetic encoder is provided with a magnetic sensor comprising a thin film magnetoresistive effect element for detecting the magnetic field of the drum, it is stronger than the optical encoder using a rotating disk having a large number of slits. In addition to being excellent, the size of the tool can be reduced, and the workability during use is improved.

また、上記した歯車式のエンコーダに比較して工具の小型化が図れるため使用時の作業性が向上する。また、上記したレゾルバ式のエンコーダと比較しても、小型化が図れるため使用時の作業性が向上する。   Further, since the tool can be reduced in size as compared with the above-mentioned gear-type encoder, the workability during use is improved. Further, even when compared with the resolver type encoder described above, the size can be reduced, and the workability during use is improved.

以下に、本発明の角度検知付き衝撃締付工具を実施するための最良の形態としての実施例について詳細に説明する。   Hereinafter, an embodiment as the best mode for carrying out the impact fastening tool with angle detection of the present invention will be described in detail.

（本実施例の基本構成）
図１は、回転駆動源の回転力を衝撃発生装置によって間欠的な衝撃に変換し、前記衝撃力によって付与されるメインシャフトの回転力によりネジ部材を締め付ける角度検知付き衝撃締付工具の一部断面図であり、スロットルレバーＳＬの操作により圧縮空気を回転駆動源たるモータＭに導き、モータＭの回転力を油圧パルス発生装置Ｐに伝達するようにし、メインシャフトＳを介して打撃を生じさせて締付を行い、所定の締付トルクに達したときに給気弁をシャットオフして締付を完了するという基本的に公知の構成を備えている（必要であれば、本件出願人による特公平６−２４７１３号公報参照）。 (Basic configuration of this embodiment)
FIG. 1 shows a part of an impact tightening tool with angle detection for converting a rotational force of a rotational drive source into an intermittent impact by an impact generator and tightening a screw member by a rotational force of a main shaft applied by the impact force. FIG. 5 is a cross-sectional view, in which compressed air is guided to a motor M as a rotational drive source by operating the throttle lever SL, and the rotational force of the motor M is transmitted to the hydraulic pulse generator P to cause an impact through the main shaft S. It is basically equipped with a well-known configuration that shuts off the air supply valve and completes the tightening when a predetermined tightening torque is reached (if necessary, by the applicant) (See Japanese Patent Publication No. 6-24713).

（本実施例に特有の構成）
本実施例の特徴は、図２に示すように、上記構成を備えた衝撃締付工具において、メインシャフトＳに生じる締付トルクを検知するトルク検知手段１０と、メインシャフトＳと一体的回転してその回転角度を検知する角度検知手段２０とを備える点にあり、とりわけ、角度検知手段２０を、周面に多極着磁が設けられ、Ｎ極とＳ極の磁極が交互に配置された磁気回転ドラム２１と、該磁気回転ドラムの周面に対向配置され、該磁気回転ドラムの磁界を検出する薄膜磁気抵抗効果素子を設けた磁気センサ２３とした点にある。 (Configuration specific to this embodiment)
As shown in FIG. 2, the present embodiment is characterized in that, in the impact tightening tool having the above-described configuration, torque detecting means 10 for detecting the tightening torque generated in the main shaft S and the main shaft S rotate integrally. In particular, the angle detection means 20 is provided with multi-pole magnetization on the peripheral surface, and N poles and S poles are alternately arranged. The magnetic rotating drum 21 and the magnetic sensor 23 provided with a thin film magnetoresistive effect element that is disposed opposite to the circumferential surface of the magnetic rotating drum and detects the magnetic field of the magnetic rotating drum are provided.

トルク検知手段１０は、メインシャフトＳの外周面に歪ゲージ１１を貼着して成り、ネジ部材を締め付けたときに生じるメインシャフトＳの捩れ量を歪ゲージを介して電圧変換するようにして、トルクを検知するものである。具体的には、計測対象となるメインシャフトＳの表面に４つの歪ゲージを貼着してブリッジ回路を形成し、トルクによる軸の捩れに伴う歪ゲージの抵抗の変化を検知してトルクを求めるものである（出願人による特公平６−２４７１３号公報参照）。   The torque detection means 10 is formed by attaching a strain gauge 11 to the outer peripheral surface of the main shaft S, and converts the torsion amount of the main shaft S generated when the screw member is tightened through the strain gauge. Torque is detected. Specifically, four strain gauges are attached to the surface of the main shaft S to be measured to form a bridge circuit, and the torque is obtained by detecting a change in the resistance of the strain gauge due to the twisting of the shaft due to the torque. (See Japanese Patent Publication No. 6-24713 by the applicant).

なお、トルク検知手段１０は、トルクを検知できるものであれば特に限定されるものではなく、例えば、２つのコイルを回転軸に近接して直交配置し（コイルと回転軸は非接触）、一方のコイルを励磁して発生させた磁束が回転軸中を透過するようにし、他方のコイルによって軸の歪みに基づいて生じた磁化方向の変化による変形した磁束を検出するようにした磁歪センサであってもよい。   The torque detection means 10 is not particularly limited as long as it can detect torque. For example, two coils are arranged close to the rotation axis and orthogonal to each other (the coil and the rotation axis are not in contact). The magnetostrictive sensor is configured to detect the magnetic flux deformed by the change of the magnetization direction generated by the other coil based on the distortion of the shaft so that the magnetic flux generated by exciting one coil can pass through the rotating shaft. May be.

角度検知手段２０は、磁気エンコーダであり、特に、周面に多極着磁が設けられ、Ｎ極とＳ極の磁極が交互に配置された円柱状の磁気回転ドラム２１と、該磁気回転ドラム２１の周面（曲面）に対向配置され、該磁気回転ドラムの磁界を検出する薄膜磁気抵抗効果素子からなる磁気センサ２３とからなる。具体的には、円板ないし円柱状の回転ドラム２１は中心軸を中心にメインシャフトＳと一体的に回転するものであり、回転ドラム２１の周囲（曲面）に磁極Ｎと磁極Ｓとが交互に着磁され、他方、磁気センサ２３は、磁気抵抗効果素子（ＭＲエレメント）として磁気抵抗効果を有するＮｉ、Ｆｅ等の強磁性金属を主成分とする合金からなる膜が用いられる。該膜は板状ないしフィルム状のＳｉ（シリコン）もしくはガラス基板の表面に蒸着等の方法で成膜され、形成された薄膜強磁性金属は特定の方向の磁界の強度に応じて抵抗値が変化するものであり、この変化からメインシャフトＳの回転角度を検出する。なお、磁気センサ２３は、磁気ドラム２１に対して０．３ミリ程度のギャップ（距離）を離して平行に固定設置される。また、磁気センサ２３は、信号処理制御回路２５と、それを結線する為の柔軟性のあるフレキシブルケーブル２４を組み合わせて用いられる。   The angle detecting means 20 is a magnetic encoder, and in particular, a cylindrical magnetic rotating drum 21 provided with multipolar magnetization on the peripheral surface and alternately arranged with N and S poles, and the magnetic rotating drum. The magnetic sensor 23 is composed of a thin film magnetoresistive effect element that is disposed opposite to the peripheral surface (curved surface) 21 and detects the magnetic field of the magnetic rotating drum. Specifically, the disc or columnar rotating drum 21 rotates integrally with the main shaft S around the central axis, and the magnetic pole N and the magnetic pole S are alternately arranged around the rotating drum 21 (curved surface). On the other hand, the magnetic sensor 23 uses a film made of an alloy mainly composed of a ferromagnetic metal such as Ni or Fe having a magnetoresistive effect as a magnetoresistive element (MR element). The film is formed on the surface of a plate-like or film-like Si (silicon) or glass substrate by vapor deposition or the like, and the resistance value of the formed thin-film ferromagnetic metal changes according to the strength of the magnetic field in a specific direction. The rotation angle of the main shaft S is detected from this change. The magnetic sensor 23 is fixedly installed in parallel to the magnetic drum 21 with a gap (distance) of about 0.3 mm. The magnetic sensor 23 is used in combination with a signal processing control circuit 25 and a flexible cable 24 that is flexible for connecting the signal processing control circuit 25.

（本実施例の構成による優れた効果）
このような本発明の構成によれば、多数のスリットが穿設された回転ディスクを用いる光学式のエンコーダに比較して強度的に優れると共に工具の小型化が図れるため使用時の作業性が向上する。また、歯車式のエンコーダに比較して工具の小型化が図れるため使用時の作業性が向上する。また、レゾルバ式のエンコーダと比較しても、小型化が図れるため使用時の使用時の作業性が向上する。 (Excellent effect by the configuration of this embodiment)
According to such a configuration of the present invention, it is superior in strength as compared with an optical encoder using a rotating disk having a large number of slits, and the size of the tool can be reduced, so that workability during use is improved. To do. Further, since the tool can be reduced in size as compared with the gear type encoder, the workability during use is improved. In addition, since the size can be reduced as compared with a resolver type encoder, workability during use is improved.

なお、メインシャフトＳと一体的回転してその回転角度を検知する角度検知手段２０は、円錐状で先細りのケース先端部Ｃ内に収容されており、この点も小型化ないし使用時の作業性の向上に寄与している。   The angle detection means 20 that rotates integrally with the main shaft S and detects the rotation angle is housed in a conical and tapered case tip C, which is also reduced in size or workability during use. It contributes to the improvement.

（本実施例による正常／異常締付の判断）
本実施例は、以下のステップによって異常締付を検知する。 (Determination of normal / abnormal tightening according to this embodiment)
In this embodiment, abnormal tightening is detected by the following steps.

すなわち、トルク検知手段１０および角度検知手段２０によって、トルク検知手段１０が第１設定トルクＴ１（スタートトルク）を検知したときに角度検知手段２０が検知した締付角度Ａが第１許容範囲Ｒ１内にあるか否かを判定し（ステップ１）、トルク検知手段１０が第２設定トルクＴ２（スナグトルク）を検知したときに角度検知手段２０が検知した締付角度Ｂが第２許容範囲Ｒ２内にあるか否かを判定し（ステップ２）、トルク検知手段１０が第３設定トルク（狙い目トルク）を検知したときに角度検知手段２０が検知した締付角度Ｃが第３許容範囲Ｒ３内にあるか否かを判定し（ステップ３）、全てのステップにおける締付角度が許容範囲内にある場合に正常な締付作業と認定し、いずれかのステップにおいて許容範囲を逸脱する場合に異常の締付作業と認定する。   That is, the tightening angle A detected by the angle detection unit 20 when the torque detection unit 10 detects the first set torque T1 (start torque) by the torque detection unit 10 and the angle detection unit 20 is within the first allowable range R1. (Step 1), the tightening angle B detected by the angle detecting means 20 when the torque detecting means 10 detects the second set torque T2 (snag torque) is within the second allowable range R2. It is determined whether or not there is (step 2), and the tightening angle C detected by the angle detecting means 20 when the torque detecting means 10 detects the third set torque (target eye torque) is within the third allowable range R3. Judgment is made (Step 3), and when the tightening angle in all steps is within the allowable range, it is recognized as normal tightening work, and the deviation deviates from the allowable range in any step. Certified and work with abnormalities of tightening in case.

なお、締付角度のほか、最終締付トルクがトルク合格範囲Ｒ４内から逸脱する場合は正常締付とは認定しない。   In addition to the tightening angle, normal tightening is not recognized if the final tightening torque deviates from within the torque pass range R4.

図３は、正常締付における締付トルク及び締付角度の変化を示している。つまり、トルク検知手段１０および角度検知手段２０によって、（i ）第１設定トルクＴ１（スタートトルク）に達するときの締付角度（ツール回転時（ゼロ）からスタートトルクに相当する角度Ａ（フリーラン角度。フリーランニング終了までの締付角度）が、設定された第１許容範囲Ｒ１（角度合格範囲）内にあること、（ii）第２設定トルクＴ２（スナグトルク）に達するときの締付角度Ｂ（スタートトルクに相当する回転角からスナグトルクに相当する回転角までの締付角度）が、設定された第２許容範囲Ｒ２（角度合格範囲）内にあること、（iii ）第３設定トルクＴ３（狙い目トルク）に達するときの締付角度Ｃ（スナグトルクに相当する回転角から狙い目トルクに相当する回転角までの締付角度）が、設定された第３許容範囲Ｒ３（角度合格範囲）内にあると判定し、正常な締付作業と認定する。   FIG. 3 shows changes in tightening torque and tightening angle in normal tightening. That is, the torque detection means 10 and the angle detection means 20 (i) tightening angle when the first set torque T1 (start torque) is reached (angle A corresponding to the start torque from the time of tool rotation (zero) (free run) The angle (the tightening angle until the end of free running) is within the set first allowable range R1 (angle passing range), and (ii) the tightening angle B when the second set torque T2 (snag torque) is reached. (Tightening angle from the rotation angle corresponding to the start torque to the rotation angle corresponding to the snag torque) is within the set second allowable range R2 (angle passing range), (iii) the third set torque T3 ( The tightening angle C (the tightening angle from the rotation angle corresponding to the snag torque to the rotation angle corresponding to the target torque) when reaching the target torque) is set at the third allowable range R. It determines that the (angular acceptance range) in, certified and working with normal tightening.

他方、図４は異常締付である「二度締め」の締付トルク及び締付角度の変化を示している。「二度締め」とは、正常に締め付けたボルトを誤って再度締め付けた場合である。ツール回転時から急激にトルクが上昇してゆき、スタートトルクＴ１に相当する締付角度Ａは第１許容範囲Ｒ１から大きく逸脱し、スナグトルクＴ２に相当する締付角度Ｂも第２許容範囲Ｒ２から大きく逸脱し、更に狙い目トルクＴ３に相当する締付角度Ｃも第３許容範囲Ｒ３から大きく逸脱することから、異常の締付作業のうち、「二度締め」と認定する。正常締付時と比較して、スタートトルクＴ１に相当する締付角度Ａ、スナグトルクＴ２に相当する締付角度Ｂ、狙い目トルクＴ３に相当する締付角度Ｃの全てが小さくなる場合が「二度締め」と推定できる。   On the other hand, FIG. 4 shows changes in the tightening torque and tightening angle of “double tightening” which is abnormal tightening. “Twice tightening” refers to a case where a bolt that has been normally tightened is accidentally tightened again. The torque suddenly increases from the time of tool rotation, the tightening angle A corresponding to the start torque T1 deviates greatly from the first allowable range R1, and the tightening angle B corresponding to the snag torque T2 is also deviated from the second allowable range R2. The tightening angle C corresponding to the target torque T3 greatly deviates from the third permissible range R3, and therefore, it is recognized as “double tightening” among the abnormal tightening operations. When the tightening angle A corresponding to the start torque T1, the tightening angle B corresponding to the snag torque T2, and the tightening angle C corresponding to the target torque T3 are all smaller than in the case of normal tightening, “2 Can be estimated.

また、図５は異常締付である「斜め入り」又は「焼き付き」の締付トルク及び締付角度の変化を示している。「斜め入り」とは、ボルト締付時、その軸心が雌ネジの軸芯に対してズレた状態で斜めに入る場合であり、「焼き付き」とは、雄ネジ又は雌ネジの製造不良もしくはネジ間に異物が混入した場合である（いずれも、トルクは発生するが、軸力が発生せずに締付不良となる）。スタートトルクＴ１に相当する締付角度Ａは第１許容範囲Ｒ１から逸脱し、狙い目トルクＴ３に相当する締付角度Ｃは第３許容範囲Ｒ３から逸脱することから、異常の締付作業のうち、「斜め入り」又は「焼き付き」と推定できる。   Further, FIG. 5 shows changes in tightening torque and tightening angle of “obliquely entering” or “seizure” that are abnormal tightening. “Inclined” means when the bolt is tightened and the axis is shifted with respect to the axis of the female screw, and “seizure” means defective production of the male screw or female screw or This is a case where foreign matter is mixed between the screws (in either case, torque is generated, but axial force is not generated and tightening is poor). The tightening angle A corresponding to the start torque T1 deviates from the first allowable range R1, and the tightening angle C corresponding to the target torque T3 deviates from the third allowable range R3. , “Oblique entry” or “burn-in” can be estimated.

このように、複数の設定トルクを設けると共に、それらに対応する複数の許容締付角度範囲を設けることにより、例えば、狙い目トルクに対応する締付角度のみによって正常／異常締付を判断する場合に比較して、より正確且つ分析的な締付判断が可能になる。   In this way, by providing a plurality of set torques and providing a plurality of permissible tightening angle ranges corresponding thereto, for example, when determining normal / abnormal tightening only by a tightening angle corresponding to the target torque Compared to the above, a more accurate and analytical tightening determination becomes possible.

本実施例の一部断面図Partial sectional view of this example 第１図の一部拡大図A partially enlarged view of FIG. 正常締付時の締付トルク及び締付角度の変化を示す図Diagram showing changes in tightening torque and tightening angle during normal tightening 異常締付時の締付トルク及び締付角度の変化を示す図（その１）Diagram showing changes in tightening torque and tightening angle during abnormal tightening (Part 1) 異常締付時の締付トルク及び締付角度の変化を示す図（その２）Diagram showing changes in tightening torque and angle during abnormal tightening (Part 2)

Ｍ モータ
Ｓ メインシャフト
Ｃ ケース先端部
１０ トルク検知手段
２０ 角度検知手段
２１ 磁気回転ドラム
２３ 磁気センサ M Motor S Main shaft C Case tip 10 Torque detection means 20 Angle detection means 21 Magnetic rotating drum 23 Magnetic sensor

Claims (4)

回転駆動源の回転力を衝撃発生装置によって間欠的な衝撃に変換し、前記衝撃力によって付与されるメインシャフトの回転力によりネジ部材を締め付ける衝撃締付工具であって、締め付けトルクを検知するトルク検知手段と、メインシャフトと一体的に回転して回転角度を検知する角度検知手段とを備え、前記角度検知手段は、周面に多極着磁が設けられ、Ｎ極とＳ極の磁極が交互に配置された磁気回転ドラムと、該磁気回転ドラムの周面に対向配置され、該磁気回転ドラムの磁界の変化を検出する薄膜磁気抵抗効果素子からなる磁気センサとを備えた磁気エンコーダであるものとして、前記衝撃締付工具の円錐状で先細りのケース先端部内に収容されていることを特徴とする、角度検知付き衝撃締付工具。   An impact tightening tool for converting a rotational force of a rotational drive source into an intermittent impact by an impact generating device and tightening a screw member by a rotational force of a main shaft applied by the impact force, and detecting a tightening torque A detecting means; and an angle detecting means for detecting a rotation angle by rotating integrally with the main shaft. The angle detecting means is provided with multipolar magnetization on the peripheral surface, and N pole and S pole magnetic poles are provided. A magnetic encoder comprising alternately arranged magnetic rotating drums, and a magnetic sensor comprising a thin film magnetoresistive effect element that is arranged opposite to the circumferential surface of the magnetic rotating drum and detects a change in the magnetic field of the magnetic rotating drum. As an object, an impact fastening tool with angle detection, characterized in that the impact fastening tool is housed in a conical and tapered case tip. 複数の設定トルクを設けると共に、それらに対応する複数の許容締付角度範囲を設けることにより、前記トルク検知手段および前記角度検知手段によって異常締付を検知することを特徴とする、請求項１に記載の角度検知付き衝撃締付工具。   The abnormal tightening is detected by the torque detecting means and the angle detecting means by providing a plurality of set torques and providing a plurality of permissible tightening angle ranges corresponding thereto. Impact tightening tool with angle detection as described. 前記トルク検知手段が第１設定トルクであるスタートトルクを検知したときに前記角度検知手段が検知した締付角度が第１許容範囲内にあるか否かを判定し、前記トルク検知手段が第２設定トルクであるスナグトルクを検知したときに前記角度検知手段が検知した締付角度が第２許容範囲内にあるか否かを判定し、前記トルク検知手段が第３設定トルクである狙い目トルクを検知したときに前記角度検知手段が検知した締付角度が第３許容範囲内にあるか否かを判定することを特徴とする、請求項１に記載の角度検知付き衝撃締付工具。   It is determined whether or not the tightening angle detected by the angle detection means is within a first allowable range when the torque detection means detects a start torque that is a first set torque, and the torque detection means It is determined whether or not the tightening angle detected by the angle detection means when a snag torque that is a set torque is within a second allowable range, and the target torque that is the third set torque is determined by the torque detection means. The impact fastening tool with angle detection according to claim 1, wherein it is determined whether or not the fastening angle detected by the angle detection means is within a third allowable range when detected. 前記全てのステップにおける締付角度が許容範囲内にある場合に正常な締付作業と認定し、いずれかのステップにおいて締付角度が許容範囲を逸脱する場合に異常の締付作業と認定し、さらに最終締付トルクがトルク合格範囲内から逸脱する場合は正常締付とは認定しないことを特徴とする、請求項３に記載の角度検知付き衝撃締付工具。   When the tightening angles in all the steps are within the allowable range, it is recognized as normal tightening work, and when the tightening angle deviates from the allowable range in any step, it is recognized as abnormal tightening work, 4. The impact tightening tool with angle detection according to claim 3, wherein when the final tightening torque deviates from a torque passing range, it is not recognized as normal tightening.
JP2013117867A 2013-06-04 2013-06-04 Impact fastening tool with angle detection Active JP5564711B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013117867A JP5564711B2 (en) 2013-06-04 2013-06-04 Impact fastening tool with angle detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013117867A JP5564711B2 (en) 2013-06-04 2013-06-04 Impact fastening tool with angle detection

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2007254480A Division JP2009083024A (en) 2007-09-28 2007-09-28 Impact fastening tool with angle detection

Publications (2)

Publication Number Publication Date
JP2013215884A true JP2013215884A (en) 2013-10-24
JP5564711B2 JP5564711B2 (en) 2014-08-06

Family

ID=49588636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013117867A Active JP5564711B2 (en) 2013-06-04 2013-06-04 Impact fastening tool with angle detection

Country Status (1)

Country Link
JP (1) JP5564711B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016059997A (en) * 2014-09-18 2016-04-25 株式会社東日製作所 Fastening tool
JP2017193052A (en) * 2017-07-31 2017-10-26 株式会社東日製作所 Fastening tool
WO2022031922A1 (en) * 2020-08-05 2022-02-10 Milwaukee Electric Tool Corporation Rotary impact tool
EP4183521A1 (en) * 2021-11-19 2023-05-24 Panasonic Holdings Corporation Impact tool and method for manufacturing output block
EP4186642A1 (en) * 2021-11-29 2023-05-31 Ingersoll-Rand Industrial U.S., Inc. High resolution anvil angle sensor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570579A (en) * 1978-11-16 1980-05-28 Stanley Electric Co Ltd Method of detecting faulty screw clamping and screw clamping device
JPS63237874A (en) * 1987-03-27 1988-10-04 本田技研工業株式会社 Nut automatic clamping device
JPH0691552A (en) * 1992-09-07 1994-04-05 Nissan Motor Co Ltd Impact type screw fastening device
JPH06198572A (en) * 1992-12-29 1994-07-19 Kuwantai Syst Kk Nut runner having torque detecting function
JPH0731281U (en) * 1993-11-17 1995-06-13 株式会社マキタ Buffer mechanism for electric oil pulse rotary tool
EP1454713A2 (en) * 2003-03-06 2004-09-08 Ingersoll-Rand Company Fastening apparatus and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570579A (en) * 1978-11-16 1980-05-28 Stanley Electric Co Ltd Method of detecting faulty screw clamping and screw clamping device
JPS63237874A (en) * 1987-03-27 1988-10-04 本田技研工業株式会社 Nut automatic clamping device
JPH0691552A (en) * 1992-09-07 1994-04-05 Nissan Motor Co Ltd Impact type screw fastening device
JPH06198572A (en) * 1992-12-29 1994-07-19 Kuwantai Syst Kk Nut runner having torque detecting function
JPH0731281U (en) * 1993-11-17 1995-06-13 株式会社マキタ Buffer mechanism for electric oil pulse rotary tool
EP1454713A2 (en) * 2003-03-06 2004-09-08 Ingersoll-Rand Company Fastening apparatus and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016059997A (en) * 2014-09-18 2016-04-25 株式会社東日製作所 Fastening tool
JP2017193052A (en) * 2017-07-31 2017-10-26 株式会社東日製作所 Fastening tool
WO2022031922A1 (en) * 2020-08-05 2022-02-10 Milwaukee Electric Tool Corporation Rotary impact tool
US11951596B2 (en) 2020-08-05 2024-04-09 Milwaukee Electric Tool Corporation Rotary impact tool
EP4183521A1 (en) * 2021-11-19 2023-05-24 Panasonic Holdings Corporation Impact tool and method for manufacturing output block
EP4186642A1 (en) * 2021-11-29 2023-05-31 Ingersoll-Rand Industrial U.S., Inc. High resolution anvil angle sensor

Also Published As

Publication number Publication date
JP5564711B2 (en) 2014-08-06

Similar Documents

Publication Publication Date Title
JP5564711B2 (en) Impact fastening tool with angle detection
JP6029656B2 (en) Power wrench with torque detection unit
JP6310024B2 (en) Torque index sensor
JP2009080020A (en) Torque detector
US20060042404A1 (en) Magnetostrictive torque sensor and electric steering system
US20090146650A1 (en) Rotation angle sensor and scissors gear suitable therefor
JP2010169586A (en) Torque amount converter
KR20120120852A (en) Rotor for torque sensor
US10693267B2 (en) Rotary structural body
JP2009083024A (en) Impact fastening tool with angle detection
JP2008102076A (en) Magnetic rotor and rotation angle detection device
WO2018123561A1 (en) Torque detection device
JP2017090403A (en) Screw fastening torque detection method and device of constant torque electric screwdriver
SE532128C2 (en) Nut wrench with a power transmission gear and rotation sensing means, as well as method for determining gear status
JP2016090540A (en) Motor performance inspection device and inspection method using the same
JP5678642B2 (en) Torque sensor and driving device
JP2007278963A (en) Rotation angle and torque sensor
JP2003166887A (en) Torque detection device
JP4404763B2 (en) Eddy current sensor device for measuring shaft torque
JP6675570B2 (en) Magnetostrictive torque sensor
TWI640752B (en) Rotating sensing device and rotating sensing method
JP2016080052A (en) Wave gear reducer with torque detector
JP2018105757A (en) Magnetic encoder device
WO2023286406A1 (en) Torque measurement device, magnetic field generation device for torque measurement device, and magnetic field detection device for torque measurement device
JP2003315178A (en) Torque detector

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130807

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20140304

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20140317

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20140423

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20140515

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20140520

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20140520

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20140527

R150 Certificate of patent or registration of utility model

Ref document number: 5564711

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250