WO2020195323A1 - Work tool and control system provided with the work tool - Google Patents

Abstract

A work tool (10) is provided with a motor (111), a trigger switch (121), a load estimation unit (161), and a proficiency level estimation unit (164). The trigger switch (121) is manipulated by an operator, and adjusts an output of the motor (111) in accordance with the manipulated amount. The load estimation unit (161) calculates, on the basis of the motor current input to the motor (111) and the rotational speed of the motor (111), information about estimated load on the motor (111). The proficiency level estimation unit (164) estimates, on the basis of the estimated load information calculated in the load estimation unit (161), the proficiency level of the user with respect to a predetermined work.

Description

Work tools and control systems equipped with them

The present invention relates to, for example, a work tool provided with a motor such as an electric screwdriver, a jigsaw, and a chainsaw, and a control system provided with the motor.

At work sites and factories, electric tools such as drills and screwdrivers that are rotationally driven by a motor to perform desired work are widely used (see, for example, Patent Document 1).

Japanese Patent No. 6107385

However, the above-mentioned conventional work tool has the following problems.
That is, in general, when using a work tool such as an electric screwdriver, jigsaw, or chainsaw, it takes time for a skilled person and another person to complete the work depending on the skill (how to apply force) of the user. Makes a big difference. In addition, the amount of work varies greatly depending on the work target (for example, wood, metal, etc.).

For example, if the skills of all users are equivalent to those of skilled workers, the work time of the entire project can be greatly reduced. However, it was difficult to define and measure the work time to be targeted, and the growth of the user depended on the user himself. For this reason, it takes a long time to improve the proficiency level of the employer, and there is a problem that the labor cost increases.
For this reason, for example, for an administrator who manages various operations using a work tool, grasping the skill level (proficiency level) of each user who uses the work tool for a predetermined work is a work process. It is especially important when planning.

An object of the present invention is to provide a work tool capable of estimating the skill level (proficiency level) of each user who uses the work tool for a predetermined work, and a control system provided with the work tool.

The work tool according to the first invention includes a motor, a trigger switch, a load estimation unit, and a proficiency level estimation unit. The trigger switch is operated by the user and adjusts the output of the motor according to the amount of operation. The load estimation unit calculates estimated load information applied to the motor based on the motor current input to the motor and the rotation speed of the motor. The proficiency level estimation unit estimates the proficiency level of the user for a predetermined work based on the estimated load information calculated by the load estimation unit.

Here, in a work tool equipped with a motor driven by the operation of a trigger switch, a predetermined work is performed based on the magnitude of the load applied to the motor (estimated load information) estimated using the motor current and the rotation speed. Estimate the user's proficiency level.
Here, the work tool includes various tools driven by a motor such as an electric screwdriver, a jigsaw, and a chainsaw. The predetermined work performed using the work tool includes screw tightening / removing work using an electric screwdriver, bolt tightening / removing work, cutting work using a jigsaw, cutting work using a chainsaw, and the like.

As a result, when using a work tool equipped with a motor, use related to a predetermined work based on the load applied to the motor (estimated load information) estimated using the motor current during work and the rotation speed of the motor. It is possible to estimate the proficiency level (skill level) of a person.
As a result, for example, a target value (target working time) of the time required to complete a predetermined work is set or the output of the motor is changed for each user according to the level of proficiency of the user. Etc. can be controlled.

The work tool according to the second invention is a work tool according to the first invention, and is a target work that is a target until the work is completed according to the proficiency level of the user estimated by the proficiency level estimation unit. It also has a target time setting unit for setting the time.
Here, a target value (target working time) of the time required to complete a predetermined work is set according to the estimated level of proficiency of the user.
As a result, by setting an appropriate goal according to the level of proficiency level of each user, it is possible to have the user perform the work within a reasonable range.

The work tool according to the third invention is the work tool according to the second invention, and the target time setting unit sets the target work time stepwise according to the proficiency level of the user.
Here, the target work time set according to the level of proficiency of the user is set stepwise.
As a result, for example, by setting the target work time set according to the proficiency level of the user in five stages from levels 1 to 5, an appropriate target work time is set according to the level of each proficiency level. be able to.

The work tool according to the fourth invention is the work tool according to the third invention, and the target time setting unit sets the proficiency level one step higher than the proficiency level of the user estimated by the proficiency level estimation unit. Set the corresponding target work time.

Here, the target work time set stepwise is set to the target work time corresponding to the level of proficiency level one step higher than the estimated level of proficiency level of the user.
As a result, a target work time corresponding to a level of proficiency one step higher than the current level of proficiency is set for each user, and each user can make it in time for the target work time. By striving to do so, you can improve your level of proficiency.
As a result, from the viewpoint of the manager, the educational function of each user is also provided, so that the educational burden on the manager can be reduced.

The work tool according to the fifth invention is a work tool according to any one of the first to fourth inventions, and the elapsed time from the work start time when the load fluctuation of the motor occurs after the trigger switch is operated. It also has a work time measurement unit that measures the work time.
Here, the work start time at which the load fluctuation of the motor occurs after the trigger switch is operated is detected, and the elapsed work time from the start of work is measured.
As a result, when estimating the level of proficiency of the user, it is possible to refer to the elapsed working time from the time when the trigger switch is operated and the load fluctuation of the motor is detected.

The work tool according to the sixth invention is the work tool according to the fifth invention, and is predetermined based on the estimated load information received from the load estimation unit and the elapsed work time received from the work time measurement unit. It also has a work time estimation unit that estimates the estimated work time required to complete the work.

Here, based on the estimated load information and the elapsed work time indicating the elapsed time since the start of the predetermined work, the estimated work time required to complete the work if the work is continued as it is is estimated. To do.
This allows the currently working user to know when the work will be completed, so that the currently working user can understand how much delay there is with respect to the target work time. Then, the delay can be used to determine the level of proficiency of the user.

The work tool according to the seventh invention is a work tool according to any one of the first to sixth inventions, and the load estimation unit includes a load torque calculation unit that calculates a load torque based on the motor current. It also has a speed fluctuation analysis unit that analyzes fluctuations in the rotation speed of the motor with respect to the load torque calculated by the load torque calculation unit and outputs estimated load information.
Here, the load torque calculated based on the motor current and the fluctuation of the rotation speed of the motor with respect to the load torque are analyzed to estimate the load applied to the motor.
As a result, the level of proficiency of the user regarding a predetermined work can be estimated using the estimated load information.

The work tool according to the eighth invention is a work tool according to any one of the first to seventh inventions, and outputs a motor output according to the proficiency level of the user received from the proficiency level estimation unit. A feedback control unit that controls to increase the number is further provided.

Here, the feedback control unit uses an output increase control such as PWM (Pulse Width Modulation) control or an output increase mechanism such as an orbital or an impact hammer according to the estimated proficiency level of the user. Increase the output of.
The controls for increasing the motor output may be adopted alone or in combination of a plurality of controls.
As a result, for example, even if the estimated user's proficiency level is low, by increasing the output of the motor, the delay in working time due to the user with low proficiency in a predetermined work can be eliminated. Can be controlled.

The work tool according to the ninth invention is the work tool according to the eighth invention, and the feedback control unit selects at least one of the output increase control and the output increase mechanism to increase the output of the motor. Take control.

Here, at least one of a plurality of output increasing means on the control surface or the mechanical surface is selected to increase the output of the motor.
As a result, by increasing the output of the motor from the control surface or the mechanical surface, for example, even if the estimated user's proficiency level is low, the working time by the user with low proficiency for a predetermined work Control can be performed so as to eliminate the delay of.

The work tool according to the tenth invention is the work tool according to the ninth invention, and the output increase control includes at least one of PWM (Pulse Width Modulation) control, advance angle control, and 150-degree energization method control. Is included.
Here, as the motor output increase control described above, at least one of PWM control, advance angle control, and 150-degree energization method control is performed.
Thereby, these motor controls can be selected or combined to increase the output of the motor.

The work tool according to the eleventh invention is the work tool according to the ninth or tenth invention, and the output increasing mechanism includes an orbital or an impact hammer.
Here, for example, the mechanical output of the work tool is increased by an orbital used as a mechanical output increasing mechanism of a work tool such as a jigsaw, or an impact hammer used as a mechanical output increasing mechanism of a work tool such as an electric screwdriver.
As a result, the mechanical output of various work tools can be increased from the mechanical aspect.

The work tool according to the twelfth invention is a work tool according to any one of the first to eleventh inventions, and further includes a sensor for detecting a value related to motor control.
As a result, various data related to motor control can be acquired using various sensors.

The work tool according to the thirteenth invention is the work tool according to the twelfth invention, and the sensor flows through the sensor for detecting the operation amount of the trigger switch, the voltage sensor for detecting the voltage applied to the motor, and the motor. It includes a current sensor that detects current and a temperature sensor that detects the temperature of the motor.
As a result, the detection results of the sensor that detects the operation amount of the trigger switch, the voltage sensor of the motor, the current sensor, the temperature sensor, and the like can be acquired.

The work tool according to the fourteenth invention is a work tool according to any one of the first to thirteenth inventions, and the motor is a brushless motor.
As a result, it is possible to provide a work tool that is easy for the user to use by providing a brushless motor having a long life, miniaturization, high output, and high efficiency.

The control system according to the fifteenth invention includes a work tool according to any one of the first to fourteenth inventions, and an external terminal that receives and displays information on the user's proficiency level from the work tool. ing.
Here, the control system is configured by combining the above-mentioned work tool and the external terminal.
Here, the external terminal includes a PC (Personal Computer), a tablet terminal, a smartphone, etc. used by a user or an administrator.
As a result, it is possible to set constraint conditions for the motor mounted on the work tool and transmit the work tool.

The control system according to the sixteenth invention is the control system according to the fifteenth invention, and the external terminal includes a display unit for displaying the proficiency level of the user, a storage unit for storing the proficiency level of the user, and the like. have.
Here, in the external terminal, the proficiency level for each user regarding a predetermined work estimated by the work tool is stored in the storage unit and displayed on the display unit.
As a result, it is possible to display and record the proficiency level information for each user received from the work tool on an external terminal such as a PC or a tablet terminal. Therefore, each user can recognize his / her own proficiency level for a predetermined work, and can recognize the growth level of each user by comparing with the past proficiency level stored in the storage unit. it can.

The control system according to the seventeenth invention is the control system according to the fifteenth or sixteenth invention, and the external terminal further has a communication unit for transmitting the proficiency level of the user to the management device.

Here, information on the user's proficiency level estimated by the work tool is transmitted to the management device used by the administrator via the communication unit of an external terminal such as a PC, tablet terminal, or smartphone used by the user or the like. Will be done.
As a result, the administrator can refer to the proficiency level of each of the plurality of users received by the management device, and confirm, for example, the achievement status of the target work time, the change (growth level) of the proficiency level of the user, and the like. Can be done.
In addition, the administrator can easily evaluate the skill level of the user by comparing the proficiency level of each user received from a plurality of work tools while checking the display unit of the management device and the like. .. Furthermore, the administrator can easily recognize the strengths and weaknesses of each user's work content by comparing the proficiency level of each user's work content.

The control system according to the eighteenth invention is the control system according to the seventeenth invention, and further includes a management device for transmitting the proficiency level of the user from the communication unit.

Here, the control system is configured to include a management device to which information on the user's proficiency level is transmitted from an external terminal.
As a result, the administrator can refer to the proficiency level of each user received by the management device included in the control system, and confirm, for example, the achievement status of the target work time, the change in the proficiency level of the user, and the like. it can.

(The invention's effect)
According to the work tool according to the present invention, it is possible to estimate the skill level (proficiency level) of each user who uses the work tool for a predetermined work.

The control block diagram which shows the structure of the control system including the work tool which concerns on one Embodiment of this invention. The control block diagram which shows the structure of the measuring part included in the work tool of FIG. The figure which shows the output increase amount for each output increase means. The flowchart which shows the flow of the control performed in the work tool of FIG. The flowchart which shows the flow of the control performed in the external terminal of FIG. The flowchart which shows the flow of the feedback control performed in the work tool of FIG. (A) is a graph showing the relationship between the working time using the work tool of FIG. 1 and the number of machinable objects (wood, metal) to be cut. (B) is a graph in which the vertical axis of the metal graph of (a) is enlarged. (A) and (b) are diagrams showing the proficiency level when the work is performed on the wood and metal for each user determined from the graphs of FIGS. 7 (a) and 7 (b). FIG. 3 is a perspective view showing a configuration of a jigsaw as an example of the work tool of FIG. FIG. 6 is a diagram schematically showing the movement of a saw blade when the output is increased by using an orbital in the jigsaw of FIG. (A) and (b) are views showing a state of cutting metal plates having different thicknesses using the jigsaw of FIG. (A) and (b) are views showing a state of cutting wooden boards having different thicknesses using the jigsaw of FIG.

The work tool according to the embodiment of the present invention will be described below with reference to FIGS. 1 to 12 (b).
(Outline of control system 100)
FIG. 1 is a block diagram showing a configuration of a control system 100 including the work tool 10 of the present embodiment.

As shown in FIG. 1, the control system 100 of the present embodiment includes a work tool 10 and an external terminal 20. The work tool 10 is a tool driven by a motor 111 such as a jigsaw, a chainsaw, or an electric screwdriver. The external terminal 20 displays, for example, log data of control values related to the drive of the motor 111 mounted on the work tool 10 and information such as estimated proficiency level for each user received from the work tool 10.

(Work tool 10)
The work tool 10 is a kind of power consuming body on which the motor 111 is mounted, and as shown in FIG. 1, the mechanism unit 11, the input unit 12, the control unit 13, the log output unit 14, and the power supply unit 15 And a measuring unit 16.
For example, when the work tool 10 is a jigsaw, the mechanism unit 11 drives a saw blade or the like.

The input unit 12 transmits the values detected by various sensors provided on the work tool 10 to the control unit 13.
The control unit 13 controls the drive of the mechanism unit 11 including the motor 111 based on the input information from the input unit 12.
The log output unit 14 transmits information such as log data of control values at the time of driving and estimated proficiency level measured by the measurement unit 16 to the external terminal 20.
The power supply unit 15 supplies electric power to the mechanism unit 11, the input unit 12, the control unit 13, the log output unit 14, and the measurement unit 16.

(Mechanical unit 11)
As shown in FIG. 1, the mechanism unit 11 includes a motor 111, a speed reducer 112, an output unit 113, a position detection unit 114, and an output increase mechanism 115.

The motor 111 is rotationally driven based on an instruction from the control unit 13. As the motor 111, for example, a three-phase DC brushless motor can be used.
The speed reducer 112 is composed of a gear mechanism or the like, and amplifies the torque of the motor 111. The rotation is synchronized between the speed reducer 112 and the motor 111, and the rotation of the motor 111 is decelerated and transmitted to the output unit 113.

The output unit 113 is, for example, a jigsaw saw blade or the like, and converts the output of the motor 111 into mechanical work according to a purpose such as cutting. The rotation is synchronized between the speed reducer 112 and the output unit 113, and the rotation of the motor 111 is output.
The position detection unit 114 is a magnetic sensor or the like represented by a Hall IC. The position detection unit 114 detects the rotation angle position of the motor 111 and transmits it to the control unit 13. The position detection unit 114 may be configured without using a sensor, and detects the rotation angle position of the motor 111 by detecting the current. The rotation is synchronized between the position detection unit 114 and the motor 111.
The output increasing mechanism 115 is, for example, an orbital mounted near the saw blade when the work tool 10 is a jigsaw, an impact hammer mounted near the tip when the work tool 10 is an electric screwdriver, or the like. The mechanical output of the work tool 10 is increased in terms of the mechanism.

(Input unit 12)
As shown in FIG. 1, the input unit 12 includes a trigger switch 121 and a sensor circuit 122.

The trigger switch 121 is an analog switch, which is provided on the handle portion of the work tool 10, and adjusts the output of the motor 111 according to the pulling amount (operation amount) thereof. Further, when the trigger switch 121 is operated by the user, the trigger switch 121 transmits a signal indicating the start of measurement to the measurement unit 16.
The sensor circuit 122 transmits the input pull amount of the trigger switch 121 to the control unit 13 via the log output unit 14. The sensor circuit 122 includes a pulling amount sensor 122a, a voltage sensor 122b, a current sensor 122c, a torque sensor 122d, and a temperature sensor 122e.

The pull amount sensor 122a detects the pull amount (operation amount) of the trigger switch 121.
The voltage sensor 122b detects the voltage applied to the motor 111.
The current sensor 122c detects the current flowing through the motor 111.
The torque sensor 122d detects the torque generated when the motor 111 rotates when, for example, the work tool 10 is used to perform bolting work on a predetermined material.
The temperature sensor 122e detects the temperature of the motor 111 and the like.
The sensor circuit 122 may include a sensor other than these sensors, for example, a sensor (humidity sensor) for measuring the ambient environment.

(Control unit 13)
As shown in FIG. 1, the control unit 13 controls the drive of the mechanism unit 11 based on, for example, a constraint condition set by an external terminal 20 capable of communicating with the work tool 10. The control unit 13 includes a feedback control unit 131, a motor drive circuit 132, a rotation speed calculation unit 133, and an output increase control unit 134.

The feedback control unit 131 receives various sensor information input from the sensor circuit 122 and a rotation speed under the constraint condition received from the external terminal 20 according to the pull amount (operation amount) of the trigger switch 121 by the user. The output of the PWM (Pulse Width Modulation) signal is determined based on the rotation angle position and the rotation speed input from the calculation unit 133.
The constraint conditions are a target value (fixed value), a vertical value limiter, a target value table, a sequence operation, and the like, which are set in the external terminal 20 described later and transmitted to the work tool 10. Then, the feedback control unit 131 transmits a PWM signal to the motor drive circuit 132.

The PWM signal transmitted from the feedback control unit 131 is determined according to the pulling amount of the trigger switch 121 and the like, and is, for example, 90%, 50%, 10%, and the like. As a result, the output of the motor can be adjusted according to the pulling amount of the trigger switch 121 and the like.
Further, in the work tool 10 of the present embodiment, the feedback control unit 131 receives the estimated proficiency level received from the measurement unit 16 via the log output unit 14 in order to supplement the skill of the user with a low proficiency level. , Output increase control for increasing the output of the motor 111 may be performed.

Specifically, the feedback control unit 131 ends the work when, for example, the estimated proficiency level described later is low and the estimated work time is later than the reference work time (target work time) of the work. In order to increase the output of the motor 111 so that the time approaches the target working time, the output increase control unit 134 performs advance angle control or 150-degree energization method control.

Since the advance angle control and the 150-degree energization method control are known controls for increasing the torque of the motor 111, detailed description thereof will be omitted here.
Further, as the output increase control of the motor 111, general PWM control may be combined and performed.
Further, when the estimated work time is later than the target work time, the feedback control unit 131 increases the output of the motor 111 on the mechanical surface so that the work completion time approaches the target work time.

Specifically, when the estimated work time is later than the target work time, the feedback control unit 131 increases the output of the motor 111 so that the work end time approaches the target work time. , Orbital, impact hammer, etc. are used by the output increasing mechanism 115 of the mechanism unit 11.
As means for controlling and mechanically increasing the output of these motors 111, any one may be selected and implemented according to the delay of the estimated working time with respect to the target working time. The means may be combined and carried out.

The motor drive circuit 132 performs a commutation operation according to the rotation angle position detected by the position detection unit 114 of the mechanism unit 11, and the motor 111 is based on the ON duty ratio by the PWM signal input from the feedback control unit 131. The average voltage applied to the UVW phase of is switched.
The rotation speed calculation unit 133 calculates the rotation speed of the motor 111 from the output pulse interval detected by the position detection unit 114 of the mechanism unit 11. Then, the rotation speed calculation unit 133 transmits the rotation angle position input from the position detection unit 114 and the calculated rotation speed to the feedback control unit 131 and the measurement unit 16, respectively.

The output increase control unit 134 controls so as to increase the output of the motor 111 from the control surface based on the output increase setting input from the feedback control unit 131. Specifically, the output increase control unit 134 increases the output of the motor 111 by transmitting an output increase control signal to the motor drive circuit 132 so as to perform advance angle control, 150-degree energization method control, and the like. ..

(Log output unit 14)
As shown in FIG. 1, the log output unit 14 transmits various sensor information and information on the estimated work time to the feedback control unit 131. In addition, the log output unit 14 transmits information regarding the estimated proficiency level and the target work time, which will be described later, to the external terminal 20.
The various sensor information includes a target value (for example, rotation speed), an output value (for example, duty ratio), and a sensor value (detection value of various sensors described above, for example, a trigger pull amount).
The log output unit 14 contains the values of various sensors detected by the sensor circuit 122, the PWM output determined by the feedback control unit 131, the rotation position / rotation speed calculated by the rotation speed calculation unit 133, and the position detection unit 114. Various data such as the rotation angle position detected in 1 and the estimated proficiency level estimated by the measuring unit 16 are input.

(Power supply unit 15)
The power supply unit 15 supplies electric power to the mechanism unit 11, the input unit 12, the control unit 13, the log output unit 14, and the measurement unit 16. The power supply unit 15 has a battery 151 and a battery control unit 152.
The battery 151 is a replaceable secondary battery, and for example, an 18 V lithium ion battery or the like is used.
The battery control unit 152 is an electronic circuit for charging / discharging a battery 151 such as a lithium ion battery.

(Measuring unit 16)
As shown in FIG. 1, the measuring unit 16 receives the motor current, the rotation speed of the motor 111, the measurement start signal of the trigger switch 121, and the like, and the magnitude of the load applied to the motor 111 and the time until the predetermined work is completed. Estimate the estimated work time required. More specifically, as shown in FIG. 2, the measurement unit 16 includes a load estimation unit 161, a work time measurement unit 162, a work time estimation unit 163, and a proficiency level estimation unit 164.

The load estimation unit 161 calculates the load (estimated load information) applied to the motor 111 based on the motor current input to the motor 111 and the rotation speed of the motor 111. As shown in FIG. 2, the load estimation unit 161 has a load torque calculation unit 161a and a speed fluctuation analysis unit 161b.
As shown in FIG. 2, the load torque calculation unit 161a receives the motor current transmitted from the motor drive circuit 132 according to the operation amount of the trigger switch 121, calculates the load torque of the motor 111, and analyzes the speed fluctuation. It is transmitted to unit 161b.

As shown in FIG. 2, the speed fluctuation analysis unit 161b analyzes the fluctuation of the rotation speed of the motor 111 based on the rotation speed of the motor 111 with respect to the load torque calculated by the load torque calculation unit 161a. Then, the speed fluctuation analysis unit 161b estimates the magnitude of the load applied to the motor 111 (estimated load information) based on the analysis result, and transmits it to the work time estimation unit 163.

As shown in FIG. 2, the working time measuring unit 162 first changes the measurement start signal indicating that the trigger switch 121 has been operated and the rotational speed (load torque) of the motor 111 received from the speed fluctuation analysis unit 161b. Is detected as the work start timing. Then, the work time measurement unit 162 measures the elapsed work time from the start of the work and transmits it to the work time estimation unit 163.
As shown in FIG. 2, the work time estimation unit 163 is currently based on the estimated load information received from the load estimation unit 161 (speed fluctuation analysis unit 161b) and the elapsed work time received from the work time measurement unit 162. Estimate the time it will take to complete a given task in progress. Then, the work time estimation unit 163 transmits the estimated work time and the estimated load information to the log output unit 14.

As shown in FIG. 2, the proficiency level estimation unit 164 is based on the estimated work time and the estimated load information received from the work time estimation unit 163, and the skill level (proficiency level) of the user regarding a predetermined work currently in progress. ) Is estimated. Then, the proficiency level estimation unit 164 transmits the estimated proficiency level and the target work time of the user set according to the estimated proficiency level to the log output unit 14.
Specifically, the proficiency level estimation unit 164 delays the estimated work time from the reference work time of the work based on the estimated load information and the estimated work time received from the work time estimation unit 163. According to the degree, the skill level (proficiency level) of the user who is currently performing a predetermined work is estimated.

That is, the proficiency level estimation unit 164 can be selected from, for example, five levels of proficiency levels: level 1 (first ball), level 2 (intermediate), level 3 (advanced), level 4 (standard), and level 5 (skilled). The proficiency level of the user is estimated according to the progress of a predetermined work currently in progress.
The process of determining the user's proficiency level in the proficiency level estimation unit 164 will be described in detail later.

In the work tool 10 of the present embodiment, as described above, the estimated load information is calculated based on the motor current and the rotation speed of the motor 111, and the skill level related to the predetermined work of the user is based on the estimated load information. Estimate (proficiency).
By estimating the skill level (proficiency level) of the user during work, for example, the time required to complete a predetermined work for each user according to the level of proficiency level of the user. Controls such as setting a target value (target working time) or changing the output of the motor 111 can be performed.

Further, in the work tool 10 of the present embodiment, the target of the time required to complete the work should be set according to the estimated proficiency level of the user and the elapsed work time of the predetermined work currently in progress. Set the working time (target working time).
As a result, for example, by setting a target work time corresponding to a level one step higher than the estimated proficiency level of the user, the user strives to complete the work within the target work time. Therefore, you can improve your own work level.
As a result, it is possible to reduce the educational burden on the manager for improving the skill level of the user.

(External terminal 20)
The external terminal 20 is a terminal used by a user or an administrator (for example, a PC (Personal Computer) capable of communicating with the work tool 10), and as shown in FIG. 1, constraint conditions for the work tool 10 are set. Then, it is transmitted to the control unit 13 on the work tool 10 side. Then, the external terminal 20 receives information on the estimated proficiency level of the user and the target working time estimated by the work tool 10 and displays them on the display unit 22.

More specifically, the external terminal 20 has a storage unit 21, a display unit 22, and a communication unit 23, as shown in FIG.
As shown in FIG. 1, the storage unit 21 receives and stores information regarding the estimated proficiency level and the target work time transmitted from the log output unit 14 of the work tool 10. Then, the storage unit 21 transmits information on the estimated proficiency level and the target working time to the display unit 22 and the communication unit 23.

The display unit 22 is, for example, a display device having an input function such as a liquid crystal touch panel, and has a proficiency level of a predetermined work estimated for each user who uses the work tool 10 and a predetermined work by the user. The target value (target working time) of the time required to complete is displayed.
As a result, the user grasps his / her skill level (proficiency level) regarding a predetermined work, recognizes the work time to be targeted (target work time), and performs the work within the target work time as much as possible. You can try to complete it.

The target work time is, for example, a reference time required for cutting 100 wooden boards having a thickness of 20 mm and a size of 50 cm × 50 cm in a cutting work using a jigsaw as a work tool 10.
As shown in FIG. 1, the communication unit 23 transmits information such as constraint conditions of the motor 111 set in the setting unit (not shown) to the feedback control unit 131 of the work tool 10. Further, the communication unit 23 sets the proficiency level of the predetermined work estimated for each user who uses the work tool 10 and the target value (target work time) of the time required for the user to complete the predetermined work. Is transmitted to the central management terminal (management device) 30 used by the administrator.
As a result, the central management terminal 30 managed by the administrator displays the skill level (proficiency level) of each user regarding the predetermined work currently in progress, so that the manager can display, for example, the skills of a plurality of users. You can compare levels and recognize the time it takes to complete a given task.

<Output increase control and output increase mechanism>
As described above, the work tool 10 of the present embodiment includes a plurality of output increasing means for increasing the output of the motor 111 when the estimated work time is delayed from the target work time.

Here, the output increasing means of the work tool 10 by the output increasing control unit 134 and the output increasing mechanism 115 shown in FIG. 1 will be described with reference to FIG.
That is, as a means for increasing the output of the work tool 10, as shown in FIG. 3, output increase control by motor control and mechanical means can be considered.
The output increasing means table shown in FIG. 3 is, for example, preferentially selected in order from No. 1, and may be adopted in a stacking method in order from the one having the higher rank.

As shown in FIG. 3, the output increasing means by the motor control includes, for example, advance angle control (0 to 40 degrees), control by a 150 degree energization method, and the like.
These advance angle control and 150 degree energization method control are performed by the output increase control unit 134 shown in FIG.
The advance angle control is a control that maximizes the torque by matching the phase between the induced voltage of the motor and the winding current, and the amount of increase in output when the advance angle control is performed is as shown in FIG. It is about 0 to 20%.

The 150-degree energization method control is a control by a sine wave energization method adopted as a control method for a three-phase brushless motor, and the amount of increase in output when the 150-degree energization method control is performed is as shown in FIG. It is about 10%.
Further, as the mechanical output increasing means, for example, as shown in FIG. 3, an orbital when the work tool 10 is a jigsaw, an impact hammer when the work tool 10 is an electric screwdriver, or the like can be considered.

As shown in FIG. 3, the output increase amount of the jigsaw combined with the orbital can be switched between 0, 20, 40, and 60% by a dial operation that can be selected stepwise.
As shown in FIG. 3, the output increase amount of the electric screwdriver combined with the impact hammer is 80%.
In the work tool 10 of the present embodiment, as described above, the output increasing means on the control surface and the mechanical surface for increasing the output of the motor 111 according to the level of the user's proficiency level estimated on the external terminal 20 side. Is adopted.

As a result, even if a user with a low level of proficiency is delayed in the progress of a predetermined work, the work tool 10 automatically moves the work tool 10 to the motor 111 without taking measures to increase the output of the motor 111 by himself / herself. Output increase control or output increase mechanism can be used to increase the output.
Therefore, even if there is a difference in the skill level of the user, the work can be completed in a work time close to the target work time, so that the work process of various works using the work tool 10 can be carried out as planned. it can. As a result, the management burden on the administrator can be reduced.

<Process of setting constraint conditions for work tool 10>
The work tool 10 of the present embodiment has the above configuration, and performs processing from the operation of the trigger switch 121 to the setting of the constraint condition for the control of the work tool 10 according to the flowcharts shown in FIGS. 4 and 5. To do. Note that FIG. 4 shows processing on the work tool 10 side, and FIG. 5 shows processing on the external terminal 20 side.

That is, as shown in FIG. 4, in step S11, the trigger switch 121 is operated by the user, and the trigger switch 121 shifts from the OFF state to the ON state. At this time, the pull amount (operation amount) of the trigger switch 121 is transmitted to the pull amount sensor 122a.
Next, in step S12, the rotation of the motor 111 is started according to the pulling amount of the trigger switch 121 in step S11.

The output from the pull amount sensor 122a is transmitted to the feedback control unit 131 via the log output unit 14. Then, the feedback control unit 131 transmits the PWM output to the motor drive circuit 132 according to the set constraint condition and the pull amount of the trigger switch 121 output from the pull amount sensor 122a. As a result, the motor drive circuit 132 can control the rotation of the motor 111 according to the constraint condition and the pulling amount of the trigger switch 121.

Next, in step S13, the rotation speed calculation unit 133 of the control unit 13 receives the signal from the position detection unit 114 of the mechanism unit 11 and starts the calculation of the rotation speed of the motor 111.
Next, in step S14, the load torque calculation unit 161a of the load estimation unit 161 of the measurement unit 16 calculates the load torque based on the motor current.
Next, in step S15, the speed fluctuation analysis unit 161b of the load estimation unit 161 creates estimated load information based on the rotation speed of the motor 111 and the load torque.

Next, in step S16, the work time measuring unit 162 starts a predetermined work based on the measurement start signal at which the operation of the trigger switch 121 is started and the timing of the load fluctuation detected by the load estimation unit 161. Start measuring the elapsed work time, which indicates the elapsed time since it was done.
As a result, after operating the trigger switch 121 of the work tool 10 to rotate the motor 111, the timing at which the tip tool or the like comes into contact with the wooden board or the like to be worked and the load fluctuates is detected as the start of work. Subsequent measurement of working time can be started.

Next, in step S17, the work time estimation unit 163 completes the predetermined work in progress based on the estimated load information received from the load estimation unit 161 and the elapsed work time received from the work time measurement unit 162. Estimate the time required to do this (estimated work time).
Next, in step S18, the proficiency level estimation unit 164 receives the estimated load information and the information regarding the estimated working time from the working time estimation unit 163.

Next, in step S19, the proficiency level estimation unit 164 estimates the skill level (proficiency level) of the user regarding a predetermined work based on the estimated load information and the estimated work time received from the work time estimation unit 163. Further, the proficiency level estimation unit 164 calculates the target work time corresponding to the proficiency level one step higher than the estimated proficiency level of the user.
Next, in step S20, the proficiency level estimation unit 164 informs the external terminal 20 of the estimated user proficiency level (estimated proficiency level) and the target work time corresponding to the level one step higher than the estimated proficiency level. Is transmitted to end the processing on the work tool 10 side.

Subsequently, regarding the processing on the external terminal 20 side that received the estimated user proficiency level (estimated proficiency level) and the target work time corresponding to the level one step higher than the estimated proficiency level from the work tool 10. The explanation will be as follows using the flowchart of FIG.
That is, as shown in FIG. 5, in step S21, the user's proficiency level (estimated proficiency level) estimated from the work tool 10 and the target work time corresponding to the level one step higher than the estimated proficiency level are related. Receive information.

Next, in step S22, the storage unit 21 stores the received information on the user's proficiency level (estimated proficiency level) and the target working time.
Next, in step S23, the display unit 22 displays information on the user's proficiency level (estimated proficiency level) and the target working time stored in the storage unit 21.
Next, in step S24, information regarding the user's proficiency level (estimated proficiency level) and the target working time is transmitted from the communication unit 23 to the central management terminal 30.
Next, in step S25, the external terminal 20 side waits until the received signal is received from the central management terminal 30. Here, when the received signal is received from the central management terminal 30, the process ends.

<Feedback control>
The work tool 10 of the present embodiment has the above configuration, and is mounted on the work tool 10 based on the constraint conditions set or changed on the external terminal 20 side according to the flowchart shown in FIG. Feedback control of the motor 111 is performed.

That is, in step 31, the feedback control unit 131 confirms the constraint condition received from the external terminal 20.
Next, in step S32, the feedback control unit 131 calculates the required amount of increase in the motor output based on the constraint conditions received in step S31.
Next, in step S33, the feedback control unit 131 refers to the output increasing means table (see FIG. 3) so as to satisfy the output increasing setting calculated in step S32, and selects the output increasing means.

Here, the output increase setting is information summarizing the selected output increase means and the setting (intensity or ON / OFF).
The process of selecting the output increasing means from the output increasing means table shown in FIG. 3 may be performed by the control unit 13 of the work tool 10, or the output increasing means table may be presented to the user or the like for selection. May be urged to.

Next, in step S34, the feedback control unit 131 transmits to the output increase control unit 134 and the output increase mechanism 115 so as to execute the output increase setting according to the selection result in step S33.
Next, in step S35, the output increase control unit 134 executes output increase control (advance angle control, 150-degree energization method control, etc.) based on the output increase setting received from the feedback control unit 131.
Next, in step S36, the output increasing mechanism 115 performs an operation using an output increasing means (orbital, impact hammer, etc.) based on the output increasing setting received from the feedback control unit 131.

<Estimation processing of user proficiency>
In the work tool 10 of the present embodiment, the skill level (proficiency level) related to the predetermined work of the user who is performing the predetermined work is estimated by the above configuration.

Here, with reference to the method of estimating the skill level (proficiency level) for each predetermined work estimated for each of a plurality of users (Mr. A, Mr. B, Mr. C, Mr. D), FIGS. The explanation using b) is as follows.
In FIG. 7A, a plurality of users (Mr. A, Mr. B, Mr. C, and Mr. D) use a jigsaw as the work tool 10 for two types of work objects (wood and metal). The relationship between one working time when the cutting work is performed and the number of sheets that can be cut with the full charge capacity of one battery (the number of sheets that can be cut) is shown.

When four users (Mr. A, Mr. B, Mr. C, and Mr. D) cut wood and metal plates using a work tool 10 (jigsaw), they are shown in FIG. 7 (a). As described above, there was a large difference in one working time and the number of sheets that could be cut among the four users.
Specifically, when the work of cutting a wood board was carried out, the result of Mr. A was that the work time of one cutting was about 5 seconds and the number of sheets that could be cut was about 146. As a result of Mr. B, the work time for one cutting was about 6 seconds, and the number of sheets that could be cut was about 128. As a result of Mr. C, the work time for one cutting was about 11 seconds, and the number of sheets that could be cut was about 92. As a result of Mr. D, the work time for one cutting was about 38 seconds, and the number of sheets that could be cut was about 40.

In this way, in the work of cutting wood boards, there is a big difference in the work efficiency of the four users. For example, Mr. A and Mr. D can cut the number of sheets that can be cut with the full charge capacity of one battery. (The number of sheets that can be cut) is 146 sheets and 40 sheets, and it can be seen that there is a difference of 100 sheets or more.
Based on this result, for example, as shown in FIG. 7A, it is estimated that Mr. C's skill level (proficiency level) related to the work of cutting wood corresponds to level 2 (intermediate level). ..

Similarly, the results of the work of cutting the metal plate are shown in FIG. 7 (b). Note that FIG. 7B is a graph obtained by enlarging the graph showing the results of the metal of FIG. 7A on the vertical axis.
Specifically, when the work of cutting a metal plate was carried out, the result of Mr. A was that the work time of one cutting was about 22 seconds and the number of sheets that could be cut was about 34. As a result of Mr. B, the work time for one cutting was about 40 seconds, and the number of sheets that could be cut was about 25. As a result of Mr. C, the work time for one cutting was about 73 seconds, and the number of sheets that could be cut was about 17. As a result of Mr. D, the work time for one cutting was about 118 seconds, and the number of sheets that could be cut was about 13.

As described above, it can be seen that the work of cutting the metal plate takes more time than the work of cutting the wood plate, and there is a big difference in the work efficiency of the four users. For example, the number of sheets that can be cut (the number of sheets that can be cut) by the full charge capacity of one battery between Mr. A and Mr. D is 34 and 13, which shows that there is a difference of more than double.
Based on this result, for example, as shown in FIG. 7 (b), it is estimated that Mr. C's skill level (proficiency level) regarding the work of cutting metal corresponds to level 1 (beginner level). ..

Here, as a result of estimating the skill level (proficiency level) related to the work of cutting a wood board for each of the four users from the graph shown in FIG. 7 (a), as shown in FIG. 8 (a). , Mr. A and Mr. B were level 4 (standard), Mr. C was level 2 (intermediate), and Mr. D was level 1 (beginner).
Similarly, as a result of estimating the skill level (proficiency level) related to the work of cutting a metal plate for each of the four users from the graph shown in FIG. 7 (b), as shown in FIG. 8 (b). , Mr. A was level 4 (standard), Mr. B was level 2 (intermediate), and Mr. C and Mr. D were level 1 (beginner).

In the work tool 10 of the present embodiment, as described above, the skill level (proficiency level) of a plurality of users regarding the work is estimated for each type of work, the material to be worked, and the like.
As a result, for example, the degree of contribution and the degree of growth of each user can be appropriately evaluated in consideration of the difference in skill level (proficiency level) for each work of each user displayed on the central management terminal 30. ..

In addition, based on the estimated skill level (proficiency level) of each user, the burden of work management on the administrator side, such as which user is assigned to which work from among multiple types of work, is borne. Can be mitigated.
Further, by displaying the estimation result of the own skill level (proficiency level) regarding the work currently in progress on the external terminal 20 used by the user, it is possible to objectively grasp the own skill level (proficiency level). You can also check the degree of growth from the past skill level.

<Output increase mechanism when using jigsaw 50>
An example of the output increasing mechanism when the jigsaw 50 shown in FIG. 9 is used as the work tool 10 of the present embodiment will be described below.
The jigsaw 50 is a work tool for cutting wood and metal by reciprocating the saw blade 52 in the vertical direction at high speed, and as shown in FIG. 9, the main body 51, the saw blade 52, and the orbital ( It is equipped with an output increasing mechanism) 53.

The reciprocating movement of the saw blade 52 in the vertical direction means the reciprocating movement in the vertical direction in FIG. 10 in the direction of advancing and retreating with respect to the main body 51.
The main body 51 has a built-in configuration (for example, motor 111, battery 151, etc.) shown in FIG. 1, and the saw blade rotates at a speed corresponding to the pulling amount of the trigger switch 121. The 52 is reciprocated up and down.

The saw blade 52 is a tip tool attached to the tip of the mechanical portion 11, and is attached so as to project downward from the main body portion 51.
As shown in FIG. 10, the orbital 53 is arranged in contact with the root portion of the saw blade 52 close to the attachment portion of the saw blade 52 to the main body 51. Then, when the orbital 53 reciprocates in the vertical direction of the saw blade 52, the saw blade 52 is moved in the direction in which the blade is present so that the tip portion of the saw blade 52 moves on the elliptical orbit in the side view shown in FIG. It is a mechanism that pushes out in stages.

The pressing amount of the saw blade 52 by the orbital 53 is configured to be set in, for example, four steps. The stepwise setting is performed by a switching drive unit (motor, solenoid, etc.) (not shown).
As a result, the setting of the orbital 53 can be changed stepwise to carry out the work in consideration of the hardness of the material to be cut by the jigsaw 50, the working speed, and the like.

Here, for example, in the case of cutting one metal plate M1 shown in FIG. 11A and the case of cutting two metal plates M1 and M2 shown in FIG. 11B, the thickness of the metal plate is different. By doubling, the motor load current (load torque) applied to the motor 111 of the work tool 10 is also doubled.
Similarly, for example, in the case of cutting one wooden board W1 shown in FIG. 12A and the case of cutting two wooden boards W1 and W2 shown in FIG. 12B, the thickness of the wooden board is doubled. As a result, the motor load current (load torque) applied to the motor 111 of the work tool 10 is also doubled.

Further, when the above-mentioned jigsaw 50 orbital 53 is used, the working time of the cutting work is shortened, while the load current (load torque) is increased as well as the thickness of the material to be cut is increased. ..
In the work tool 10 of the present embodiment, for example, the level of the user's proficiency level is low and is in progress according to the user's skill level (proficiency level) estimated by the external terminal 20 due to the above configuration. When the work is delayed, the output increasing means on the control surface and the mechanical surface for increasing the output of the motor 111 is adopted.

For example, when the work tool 10 is a jigsaw 50, the orbital 53 shown in FIG. 10 is controlled to operate. When the orbital 53 can be set in four stages of 0 to 3, for example, it may be controlled so as to be set in an appropriate stage according to the degree of delay from the target working time, or it may be used. A display may be displayed prompting the person to select a stage.
As a result, the user can adopt the output increase control or the output increase mechanism so that the work tool 10 automatically increases the output of the motor 111 without taking measures to increase the output of the motor 111.

Therefore, even if there is a difference in the skill level (proficiency level) of the user, the work can be completed in a work time close to the target work time, so that the work process of various works using the work tool 10 can be performed as planned. Can be carried out. As a result, the management burden on the administrator can be reduced.

[Other Embodiments]
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.
(A)
In the above embodiment, the load estimation unit 161 completes the predetermined work currently in progress based on the estimated load information and the elapsed work time created based on the motor current and the rotation speed of the motor 111. In addition to estimating the required time (estimated work time), an example of estimating the skill level (proficiency level) of the user regarding a predetermined work based on the estimated work time and the estimated load information has been described. However, the present invention is not limited to this.
For example, the skill level (proficiency level) of the user during work may be estimated based on the estimated load information without using the estimation result of the estimated work time.

(B)
In the above embodiment, according to the estimated proficiency level of the user, the target work time one step higher than the target work time of the predetermined work set stepwise is set on the display unit 22 or the like of the external terminal 20. The explanation was given with an example of displaying. However, the present invention is not limited to this.

For example, the target work time of a predetermined work set stepwise according to the estimated proficiency level of the user may be displayed as it is.
In this case, the user can confirm the target work time corresponding to the current skill level (proficiency level) and endeavor to surely complete the work within that time.
However, from an educational point of view for improving the skill level of the user, it is more preferable that the target working time corresponding to the proficiency level one step higher is displayed as in the above embodiment.

(C)
In the above embodiment, the estimated work time estimated from the actual work situation is compared with the target work time, and when a delay occurs, the output of the motor 111 is increased so as to approach the target work time. An example of adopting various means has been described. However, the present invention is not limited to this.

For example, when the estimated work time is delayed with respect to the target work time, the delay of the work time may be displayed on the display unit of the external terminal or the like.
In this case, the user or administrator who has confirmed the display unit of the external terminal recognizes the delay in the work and takes measures such as increasing the number of workers, thereby causing a delay in the work process. It can be avoided.

(D)
In the above embodiment, the work tool 10 is connected to the external terminal 20, and the user's skill level (proficiency level) estimated by the work tool 10 and the target work time corresponding to the level one step higher are externally set. An example of transmitting to the terminal 20 side has been described. However, the present invention is not limited to this.
For example, if a display / input means such as a liquid crystal touch panel is provided on the work tool side, the skill level (proficiency level) and the target work time may be displayed on the work tool side.
That is, the present invention may be configured by a single work tool that does not include an external terminal.

(E)
In the above embodiment, an example in which the central management terminal 30 used by the administrator is connected to the work tool 10 via the external terminal 20 has been described. However, the present invention is not limited to this.
For example, the central management terminal may be configured as a control system directly connected to the work tool.

(F)
In the above embodiment, an example in which a PC (Personal Computer) capable of communicating with the work tool 10 is used as the external terminal 20 constituting the control system 100 of the present invention has been described. However, the present invention is not limited to this.
For example, in addition to a PC, it may be an external terminal having a display function and a setting function, such as a smartphone or a tablet terminal.

(G)
In the above embodiment, an example in which the present invention is applied to a work tool 10 driven by receiving electric power from a replaceable battery 151 has been described. However, the present invention is not limited to this.
For example, the present invention may be applied to a cord-type work tool.

(H)
In the above embodiment, an example in which a three-phase DC brushless motor is used as the motor mounted on the power consumer has been described. However, the present invention is not limited to this.
For example, the control target may be a power consumer equipped with another motor such as a brushed DC motor.

(I)
In the above embodiment, the jigsaw 50 has been mainly described as an example of the work tool of the present invention. However, the present invention is not limited to this.
For example, other than the jigsaw, the present invention may be applied to other work tools such as an electric screwdriver and a chainsaw.

Since the work tool of the present invention has the effect of being able to estimate the skill level (proficiency level) of each user who uses the work tool for a predetermined work, it is suitable for various work tools equipped with a motor. Widely applicable.

10 Work tool 11 Mechanical unit 12 Input unit 13 Control unit 14 Log output unit 15 Power supply unit 16 Measurement unit 20 External terminal 21 Storage unit 22 Display unit 23 Communication unit 30 Central management terminal (management device)
50 Jigsaw (work tool)
51 Main body 52 Saw blade 53 Orbital (output increase mechanism)
100 Control system 111 Motor 112 Decelerator 113 Output unit 114 Position detection unit 115 Output increase mechanism 121 Trigger switch 122 Sensor circuit 122a Pull amount sensor 122b Voltage sensor 122c Current sensor 122d Torque sensor 122e Temperature sensor 131 Feedback control unit 132 Motor drive circuit 133 Rotation speed calculation unit 134 Output increase control unit 151 Battery 152 Battery control unit 161 Load estimation unit 161a Load torque calculation unit 161b Speed fluctuation analysis unit 162 Working time measurement unit 163 Working time estimation unit 164 Proficiency estimation unit M1, M2 Metal plate W1 , W2 wooden board

Claims (18)

1. With the motor
   A trigger switch that is operated by the user and adjusts the output of the motor according to the amount of operation.
   A load estimation unit that calculates estimated load information applied to the motor based on the motor current input to the motor and the rotation speed of the motor.
   A proficiency level estimation unit that estimates the proficiency level of the user for a predetermined work based on the estimated load information calculated by the load estimation unit.
   Work tools equipped with.
2. Further, a target time setting unit for setting a target work time as a target until the work is completed is further provided according to the proficiency level of the user estimated by the proficiency level estimation unit.
   The work tool according to claim 1.
3. The target time setting unit sets the target work time stepwise according to the proficiency level of the user.
   The work tool according to claim 2.
4. The target time setting unit sets the target work time corresponding to the proficiency level one step higher than the proficiency level of the user estimated by the proficiency level estimation unit.
   The work tool according to claim 3.
5. Further, a work time measuring unit for measuring the elapsed work time from the work start time when the load fluctuation of the motor occurs after the trigger switch is operated is further provided.
   The work tool according to any one of claims 1 to 4.
6. A work time estimation unit that estimates the estimated work time required to complete a predetermined work based on the estimated load information received from the load estimation unit and the elapsed work time received from the work time measurement unit. , Further prepared
   The work tool according to claim 5.
7. The load estimation unit analyzes the load torque calculation unit that calculates the load torque based on the motor current and the fluctuation of the rotation speed of the motor with respect to the load torque calculated by the load torque calculation unit, and the estimated load information. Has a speed fluctuation analysis unit that outputs
   The work tool according to any one of claims 1 to 6.
8. Further, it is provided with a feedback control unit that controls so as to increase the output of the motor according to the proficiency level of the user received from the proficiency level estimation unit.
   The work tool according to any one of claims 1 to 7.
9. The feedback control unit selects at least one of the output increase control and the output increase mechanism to control to increase the output of the motor.
   The work tool according to claim 8.
10. The output increase control includes at least one of PWM (Pulse Width Modulation) control, advance angle control, and 150 degree energization method control.
    The work tool according to claim 9.
11. The output increasing mechanism includes an orbital or an impact hammer.
    The work tool according to claim 9 or 10.
12. A sensor for detecting a value related to the control of the motor is further provided.
    The work tool according to any one of claims 1 to 11.
13. The sensor includes a sensor that detects the operation amount of the trigger switch, a voltage sensor that detects a voltage applied to the motor, a current sensor that detects a current flowing through the motor, and a temperature sensor that detects the temperature of the motor. ,
    The work tool according to claim 12.
14. The motor is a brushless motor.
    The work tool according to any one of claims 1 to 13.
15. The work tool according to any one of claims 1 to 14,
    An external terminal that receives and displays information on the proficiency level of the user from the work tool, and
    Control system with.
16. The external terminal has a display unit that displays the proficiency level of the user and a storage unit that stores the proficiency level of the user.
    The control system according to claim 15.
17. The external terminal further has a communication unit that transmits the proficiency level of the user to the management device.
    The control system according to claim 15 or 16.
18. The management device for transmitting the proficiency level of the user from the communication unit is further provided.
    The control system according to claim 17.

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