WO2018088443A1 - 電動工具並びにその制御装置及び制御回路 - Google Patents
電動工具並びにその制御装置及び制御回路 Download PDFInfo
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- WO2018088443A1 WO2018088443A1 PCT/JP2017/040315 JP2017040315W WO2018088443A1 WO 2018088443 A1 WO2018088443 A1 WO 2018088443A1 JP 2017040315 W JP2017040315 W JP 2017040315W WO 2018088443 A1 WO2018088443 A1 WO 2018088443A1
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- power tool
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- 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
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
-
- 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
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
-
- 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
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
-
- 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
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
- B25B21/002—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes
Definitions
- the present invention relates to a power tool having a power tool body capable of setting and changing the magnitude of a tightening torque when tightening a screwing member, and a control device and control circuit therefor, and more specifically, driving a power tool body.
- the present invention relates to a power tool, a control device, and a control circuit for the power tool which are configured to notify a worker about the magnitude of the set value of the tightening torque before starting the operation.
- Patent Document 1 In a power tool for tightening a screwed member such as a screw or nut, it may be necessary to change the tightening torque according to the type of the screw or the other material to be tightened. For this reason, some electric tools have an electric or mechanical torque control mechanism so that the magnitude of tightening torque can be changed (Patent Document 1). Also, in the factory production line, different types of screws and the like may be continuously tightened in a predetermined order, and the power tool used in such a case may have a predetermined setting performed with the same settings. The power tool itself determines that the work process has been completed, and when it moves to the next work process, the setting value of the tightening torque is automatically changed to the set value required in that process. There is also.
- the magnitude of the reaction force applied to the hand of the operator holding the power tool when performing the tightening operation also changes according to the change in the set value.
- the operator always knows the set value of the tightening torque that is set at that time, and how much reaction force is applied to his / her hand by that set value. Then, the operator can make advance preparations such as adjusting the gripping force in accordance with the assumed reaction force.
- the operator does not always correctly grasp the setting value of the tightening torque, and the operator may not notice that the setting has been changed, particularly when the setting value is automatically changed. In such a case, the tightening torque is set to a larger value than expected, and the reaction force may unexpectedly be larger than expected.
- the present invention notifies the operator of the set value of the tightening torque as necessary before starting the tightening operation, and a relatively large torque is applied. It is an object of the present invention to provide a power tool capable of notifying an operator in advance of the above, and a control device and control circuit thereof.
- the present invention An electric tool main body capable of setting and changing the magnitude of the tightening torque when tightening the screwing member, and a notification means for notifying an operator of the set value of the tightening torque
- a control circuit in a tool When the set value of the tightening torque for the power tool main body is set to a value larger than the reference value, a notification execution signal is transmitted to the notification means before driving of the power tool main body is started.
- a control circuit that allows a worker to be notified by means.
- the control circuit informs an operator who uses an electric tool provided with the control circuit that the tightening torque is set to a value larger than a reference value before the electric tool body is driven. So that they can be notified. Therefore, an operator who uses the power tool can recognize in advance that a relatively large reaction force is applied as the power tool body is driven, and prepares in advance for a large reaction force. Can be left. This prevents the situation where the electric tool rotates due to the reaction caused by the tightening torque and the screwing member cannot be tightened with an appropriate torque, or the electric tool is separated from the operator's hand. Is possible.
- the reference value can be a predetermined threshold value.
- the reference value can be a value obtained by adding a predetermined allowable variation value to a value before the setting value is changed.
- the reference value includes a first reference value and a second reference value
- the first reference value is a predetermined threshold value
- the second reference value is a value obtained by adding a predetermined allowable variation value to a value before the setting value is changed.
- the present invention also provides A power tool body capable of setting and changing the magnitude of the tightening torque when tightening the screwing member; A notification means for notifying the operator of the set value of the tightening torque; Any of the control circuits described above;
- An electric tool comprising:
- the notification by the notification means is at least one of notification by visual display, notification by voice display, and notification by temporarily disabling the power tool body. Can be.
- the notification includes at least a notification by temporarily disabling the electric power tool body,
- the power tool body has a notification release operation unit,
- the electric power tool main body should not be able to start driving the electric power tool main body after the notification by the notification means is performed and before the notification is released after the notification release operation unit is operated. Can do.
- the present invention also provides A control device having any one of the control circuits described above, wherein the control device is separate from the control device, and is capable of setting and changing the magnitude of the tightening torque when tightening the screwing member.
- a control device that is communicably connected to a tool body and controls the power tool body that is communicably connected.
- 1 is an external view of an electric driver according to a first embodiment of the present invention. It is a functional block diagram of the electric driver of FIG. It is a 1st flowchart which shows the notification operation
- an electric screwdriver (electric tool) 100 is rotated by a built-in electric motor 112 (not shown in FIG. 1).
- An electric driver main body (electric tool main body) 110 having 114 and a control circuit 120 (not shown in FIG. 1) disposed in the electric driver main body 110 are provided.
- a driver bit 116 appropriately selected according to the screw to be tightened is detachably attached to the bit holder 114.
- the electric driver main body 110 is further provided with an interface unit 130 having an LED display unit 132 and a plurality of operation buttons 134.
- the electric driver 100 includes a start switch (not shown) for starting the electric motor 112 in the electric driver main body 110.
- the activation switch is turned on by pressing a driver bit 116 attached to the bit holder 114 against the screw, whereby the motor control unit 122 starts driving the electric motor 112.
- the electric driver 100 further includes a torque sensor 124 for detecting the driving torque of the electric motor 112.
- the control circuit 120 includes a calculation unit 120A for performing various calculation processes and a memory 120B for storing data such as setting parameters.
- the electric driver main body 110 can change the setting of the tightening torque. Specifically, the electric power supplied to the electric motor 112 is appropriately controlled by the motor control unit 122 based on the magnitude of the torque detected by the torque sensor 124 to control the torque of the electric motor 112, and the tightening torque applied to the screw Is limited within the range of the set value of the tightening torque set in advance before the start of driving.
- the set value of the tightening torque can be changed by the operation button 134 of the interface unit 130 or an external setting device (not shown) connected to the electric driver main body 110 by communication.
- the electric driver 100 is automatically operated when it is necessary to change the magnitude of the tightening torque in the case where one worker sequentially tightens different types of screws on a production line or the like. It is also possible to change the set value.
- setting parameters used in each process in a series of operations including a plurality of different tightening processes are stored in advance in the memory 120B, and the calculation unit 120A completes each process and performs the next process.
- the setting parameter used in the next step when moving to is read from the memory 120B, and the setting of the electric driver main body 110 is automatically changed.
- the electric driver main body 110 is driven under the first setting parameter, and when the first step is completed, the calculation unit 120A reads the second setting parameter for the second step from the memory 120B and sets the setting.
- the first setting parameter is automatically changed to the second setting parameter.
- the electric driver main body 110 is driven based on the set value until the tightening of the two screws is completed.
- the setting parameter is automatically changed to the setting parameter for the next process every time each process ends.
- the setting parameter may include items such as the rotation speed and the rotation time of the electric motor 112 as necessary, in addition to the setting value of the tightening torque described above.
- the electric driver 100 compares the set value with a reference value described later, and the set value is set to a value larger than the reference value. If there is, a predetermined notification to be described later is given to the worker. Thus, the operator can know that a relatively large torque is generated when the next driving is performed before starting the screw tightening operation.
- the notification to the worker in the present embodiment is based on a notification execution signal from the control circuit 120, a notification by visual display by blinking of the LED display unit 132, a notification by sound display by a buzzer sound of the buzzer 136, and temporarily electric This notification is made by setting the electric motor 112 of the driver main body 110 to a non-driveable state, and these three notifications are made simultaneously.
- the notification means such as the LED display unit 132 and the buzzer 136 does not include an electronic circuit
- the notification execution signal from the control circuit 120 directly supplies power for driving the notification means to the notification means.
- the notification means includes an electronic circuit
- the notification execution signal is an input signal to the electronic circuit
- the notification means includes a switch of an electric circuit such as a relay or a transistor.
- the notification execution signal is a contact signal for opening / closing a switch such as a relay.
- a contact signal for opening / closing a switch such as a relay.
- Various forms of the notification means are conceivable depending on the type and presence of the control circuit. Therefore, various forms according to the form of the notification means to be used are appropriately selected as the notification execution signal.
- the notification execution signal may be in any form as long as it is sent to the notification means so that the notification means notifies the worker.
- the notification is canceled by pressing an operation button (notification cancellation operation unit) 134 of the interface unit 130.
- the electric motor 112 returns to a drivable state, and the screw can be tightened.
- the setting parameters including the tightening torque setting value can be changed manually or automatically as described above.
- the notification operation of the electric driver 100 will be described in more detail by taking as an example the case where the set value of the tightening torque is automatically changed.
- the calculation unit 120A of the control circuit 120 reads the setting value of the tightening torque for the first process from the memory 120B (S102).
- the calculation unit 120A compares the set value of the tightening torque with a preset threshold value (reference value) (S104).
- the calculation unit 120A determines that there is a need for notification to the worker, and sends a notification execution signal to each notification means to notify the operator.
- a command is given to do (S106).
- a notification execution signal is transmitted to the LED display unit 132, the buzzer 136, and the motor control unit 122.
- the LED display unit 132 blinks the LED
- the buzzer 136 sounds a buzzer sound
- the motor control unit 122 does not drive the electric motor 112 even when the drive switch is turned on.
- the operation button 134 serving as a notification canceling operation unit in the interface unit 130 When the operation button 134 serving as a notification canceling operation unit in the interface unit 130 is pressed while the notification is being performed, the notification is canceled, the blinking of the LED display unit 132 and the buzzer sound from the buzzer are stopped, and the motor control The unit 122 is in a state where the electric motor 112 can be driven (S108), and can be tightened (S110).
- the screw tightening operation (S110) is repeated until the predetermined screw tightening process set as the first process is completed, and the process is completed (S112). Are set (S102), and setting values such as tightening torque are changed.
- the setting value of the tightening torque whose setting has been changed is compared with the threshold value as before (S104), and if the setting value is set to a value larger than the threshold value, a notification operation is performed (S106). Thereafter, the same operation is repeated to complete all the processes (S114), and the control including the notification operation is ended (S116).
- notification is performed only when the set value is changed as described above, and notification is not performed before the second and subsequent screw tightening operations in the same process.
- the notification may be performed every time before the screw tightening operation.
- the determination of the necessity of notification may be made by comparing the current setting value of the tightening torque with the previous setting value before the setting is changed (S154, S156)). .
- the current set value is set to a value larger than this reference value, with a value obtained by adding a predetermined allowable fluctuation value stored in the memory 120B to the value of the previous set value as a reference value.
- a notification operation similar to the case of FIG. 3 is performed.
- the previous set value is subtracted from the current set value in the comparison between the previous set value and the current set value (S154), and when the subtracted value is larger than the allowable variation value.
- the determination of the necessity of notification may be a combination of the method (S104, S106) shown in FIG. 3 and the method (S154, S156) shown in FIG. That is, first, the current setting value of the tightening torque is compared with a predetermined threshold value (first reference value) (S204), and a notification is made when the current setting value is set to a value larger than the threshold value ( S210) When the value is set to a small value, the current set value is compared with a value (second reference value) obtained by adding a predetermined allowable variation value to the previous set value (second reference value) (S206).
- notification is made (S210), and when it is set to a small value, notification is not made.
- the current set value is more than at least one of the first reference value (predetermined threshold) and the second reference value (a value obtained by adding a predetermined allowable variation value to the previous set value). This means that notification is performed when a large value is set.
- the set value of the tightening torque is evaluated before the driving of the electric motor 112 is started, and is set to a value larger than a reference value that is set variously.
- a relatively large tightening torque will be generated before performing the tightening operation, and grip the electric driver main body 110 with a large force accordingly.
- the electric driver 200 includes an electric driver main body 210 and a control device 250 that is separate from the electric driver main body 210.
- a control device 250 In the control device 250, an interface unit 230 having an LED display unit 232 and an operation button 234 is disposed, and a control circuit 120 (FIG. 2) for controlling the electric driver main body 210 is incorporated therein.
- the configuration and function of the control circuit 120 in the electric driver 200 are the same as those in the electric driver 100 according to the first embodiment.
- the control device 250 and the electric driver main body 210 are communicatively connected by a cable 252.
- each setting parameter for the plurality of electric driver main bodies 210 is stored in the memory 120B.
- the threshold value and allowable variation value for determining the necessity of notification may be common values for all the electric driver main bodies 210, or different values may be set for each. Further, when it is assumed that a plurality of electric driver main bodies 210 are used by one worker, the previous set value of the tightening torque in FIGS. 4 and 5 is used in the previous tightening operation.
- the set value of the tightening torque at the previous tightening operation can be used.
- the LED display unit 232 and the buzzer 136 as notification means and the operation button 234 as a notification release operation unit may be provided in the electric driver main body 210, or in both the electric driver main body 210 and the control device 250. You may make it provide.
- the electric tool according to the present invention may be a tool for fastening a screwing member other than a screw such as a nut.
- the notification means the notification by visual display, the notification by audio display, and the notification by temporarily disabling the electric driver main body are performed simultaneously. Only one or two of the three may be performed, or notification means other than the above three may be used. Further, the notification may be canceled by other means such as automatically canceling after a predetermined time has passed, not by a cancel button. Furthermore, it is also possible to set a plurality of threshold values and allowable fluctuation values so as to perform different notifications such as changing the color of the LED or changing the buzzer sound according to the magnitude of the set value of the tightening torque. it can.
- the tightening torque is controlled by electric control by controlling the electric power supplied to the electric motor.
- the tightening torque is controlled by changing the setting of the clutch operation start torque in the mechanical clutch mechanism. You may make it implement
- the mechanical clutch mechanism is usually configured such that one of the two clutch plates is biased toward the other clutch plate by a spring, and one of the clutch plates is caused by a torque acting between the clutch plates by a screw tightening operation. When the clutch plate is separated from the other clutch plate against the urging force of the spring, the connection in the rotational direction between the clutch plates is released, and the power transmission between the clutch plates is released.
- the magnitude of the clutch operation starting torque that is, the set value of the tightening torque can be changed by adjusting the biasing force of the spring.
- the control circuit 120 should acquire the current tightening torque setting value based on a signal from a sensor that directly or indirectly detects the biasing force of the spring.
- the clutch mechanism is provided with a mechanism for changing the biasing force of the spring based on an external signal, and the control circuit 120 transmits a signal related to the set value of the tightening torque to the clutch mechanism to thereby perform the clutch operation of the clutch mechanism.
- Electric screwdriver (electric power tool) 100; Electric screwdriver main body (electric power tool main body) 110; Electric motor 112; Bit holder 114; Driver bit 116; Control circuit 120; Arithmetic unit 120A; Memory 120B; Interface unit 130; display unit 132; operation button 134; buzzer 136; Electric driver 200; Electric driver main body 210; Interface unit 230; Display unit 232; Input button 234; Control device 250; Cable 252
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
螺合部材を締め付ける際の締付トルクの大きさを設定変更可能とされた電動工具本体と、該締付トルクの設定値に関する通知を作業者に対して行うための通知手段と、を備える電動工具における制御回路であって、
電動工具本体に対する締付トルクの設定値が基準値よりも大きな値に設定されているときに、該電動工具本体の駆動が開始される前に通知手段に通知実行信号を送信して、該通知手段による作業者に対する通知が行われるようにする、制御回路を提供する。
該基準値が、第1基準値と第2基準値とを含み、
該第1基準値は所定の閾値であり、該第2基準値は該設定値の設定変更される前の値に所定の許容変動値を加算した値であり、
該電動工具本体に対して設定されている締付トルクの該設定値が該第1基準値と該第2基準値とのうちの少なくとも一方よりも大きいときに、該通知手段に該通知実行信号を送信するようにすることもできる。
螺合部材を締め付ける際の締付トルクの大きさを設定変更可能とされた電動工具本体と、
該締付トルクの設定値に関する通知を作業者に対して行うための通知手段と、
上述の何れかの制御回路と、
を備える電動工具を提供する。
該通知が、該電動工具本体を一時的に駆動不可とすることによる通知を少なくとも含み、
該電動工具本体が通知解除操作部を有しており、
該電動工具本体は、該通知手段による該通知が行なわれてから該通知解除操作部が操作されて該通知が解除されるまでの間は、該電動工具本体の駆動を開始できないようにすることができる。
上述の何れかの制御回路を有する制御装置であって、当該制御装置とは別体とされた、螺合部材を締め付ける際の締付トルクの大きさを設定変更可能とされた少なくとも一つの電動工具本体と通信接続可能とされ、通信接続された該電動工具本体を制御するようにされた制御装置を提供する。
電動ドライバ200;電動ドライバ本体210;インターフェース部230;表示部232;入力ボタン234;制御装置250;ケーブル252
Claims (8)
- 螺合部材を締め付ける際の締付トルクの大きさを設定変更可能とされた電動工具本体と、該締付トルクの設定値に関する通知を作業者に対して行うための通知手段と、を備える電動工具における制御回路であって、
電動工具本体に対する締付トルクの設定値が基準値よりも大きな値に設定されているときに、該電動工具本体の駆動が開始される前に通知手段に通知実行信号を送信して、該通知手段による作業者に対する通知が行われるようにする、制御回路。 - 該基準値が、所定の閾値である、請求項1に記載の制御回路。
- 該基準値が、該設定値の設定変更される前の値に所定の許容変動値を加算した値である、請求項1に記載の制御回路。
- 該基準値が、第1基準値と第2基準値とを含み、
該第1基準値は所定の閾値であり、該第2基準値は該設定値の設定変更される前の値に所定の許容変動値を加算した値であり、
該電動工具本体に対して設定されている締付トルクの該設定値が該第1基準値と該第2基準値とのうちの少なくとも一方よりも大きいときに、該通知手段に該通知実行信号を送信するようにされた、請求項1に記載の制御回路。 - 螺合部材を締め付ける際の締付トルクの大きさを設定変更可能とされた電動工具本体と、
該締付トルクの設定値に関する通知を作業者に対して行うための通知手段と、
請求項1乃至4の何れか一項に記載の制御回路と、
を備える電動工具。 - 該通知手段による該通知が、視覚的表示による通知と、音声表示による通知と、該電動工具本体を一時的に駆動不可とすることによる通知と、のうちの少なくとも一つである、請求項5に記載の電動工具。
- 該通知が、該電動工具本体を一時的に駆動不可とすることによる通知を少なくとも含み、
該電動工具本体が通知解除操作部を有しており、
該電動工具本体は、該通知手段による該通知が行なわれてから該通知解除操作部が操作されて該通知が解除されるまでの間は、該電動工具本体の駆動を開始できないようにされた、請求項6に記載の電動工具。 - 請求項1乃至4の何れか一項に記載の制御回路を有する制御装置であって、当該制御装置とは別体とされた、螺合部材を締め付ける際の締付トルクの大きさを設定変更可能とされた少なくとも一つの電動工具本体と通信接続可能とされ、通信接続された該電動工具本体を制御するようにされた制御装置。
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DE112017005671.3T DE112017005671B4 (de) | 2016-11-10 | 2017-11-08 | Elektrisches motorangetriebenes werkzeug und steuervorrichtung und steuerschaltung dafür |
JP2018512449A JP6592190B2 (ja) | 2016-11-10 | 2017-11-08 | 電動工具並びにその制御装置及び制御回路 |
GB1906187.8A GB2569764B (en) | 2016-11-10 | 2017-11-08 | Electric motor-driven tool, and control device and control circuit therefor |
CN201780069418.XA CN109922927B (zh) | 2016-11-10 | 2017-11-08 | 电动工具及其控制装置以及控制电路 |
KR1020197015268A KR102191641B1 (ko) | 2016-11-10 | 2017-11-08 | 전동 공구 그리고 그 제어 장치 및 제어 회로 |
US16/407,651 US11077539B2 (en) | 2016-11-10 | 2019-05-09 | Electric motor-driven tool, and control device and control circuit therefor |
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US16/407,651 Continuation US11077539B2 (en) | 2016-11-10 | 2019-05-09 | Electric motor-driven tool, and control device and control circuit therefor |
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SE538799C2 (sv) * | 2015-06-30 | 2016-11-29 | Atlas Copco Ind Technique Ab | Method and a power tool for error proof screw joint tightening. |
KR102379032B1 (ko) | 2020-07-16 | 2022-03-29 | 계양전기 주식회사 | 전동 공구 |
SE544504C2 (en) * | 2021-09-17 | 2022-06-21 | Atlas Copco Ind Technique Ab | A power tool and a method of determining torque |
TWI803064B (zh) * | 2021-11-23 | 2023-05-21 | 車王電子股份有限公司 | 電動工具及其控制方法 |
WO2024000557A1 (en) * | 2022-07-01 | 2024-01-04 | Apex Brands, Inc. | Electronic torque wrench with torque overshoot compensation |
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DE112017005671B4 (de) | 2024-04-25 |
TWI648132B (zh) | 2019-01-21 |
CN109922927A (zh) | 2019-06-21 |
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GB201906187D0 (en) | 2019-06-19 |
US11077539B2 (en) | 2021-08-03 |
KR102191641B1 (ko) | 2020-12-16 |
GB2569764B (en) | 2022-01-12 |
JPWO2018088443A1 (ja) | 2018-11-08 |
CN109922927B (zh) | 2020-12-22 |
KR20190073503A (ko) | 2019-06-26 |
GB2569764A (en) | 2019-06-26 |
DE112017005671T5 (de) | 2019-09-05 |
JP6592190B2 (ja) | 2019-10-16 |
TW201829133A (zh) | 2018-08-16 |
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