Impact rotary tool, impact rotary tool system, management system

Abstract

To make it possible to bring a timing of detecting seating close to a timing that a user intends.SOLUTION: An impact rotating tool 1 comprises a motor 2, an output shaft, an impact mechanism and a seating detecting part 145. The output shaft holds a tip tool and is rotated by power of the motor 2. The impact mechanism performs impact motion for making the output shaft generate intermittent impact force from power of the motor 2. The seating detecting part 145 detects seating with respect to an object to be worked of a fastening component that is rotated by the tip tool. The seating detecting part 145 has a plurality of seating detection modes. The impact rotating tool 1 further comprises an obtaining part 146 that obtains information showing one seating detection mode selected out of the plurality of seating detection modes. The seating detecting part 145 detects seating, on the basis of the seating detection mode shown by the information obtained by the obtaining part 146.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure generally relates to an impact rotary tool, an impact rotary tool system, and a management system. More particularly, the present disclosure relates to an impact rotary tool that performs an impact operation to generate intermittent impact force on an output shaft from power of a motor, an impact rotary tool system including the impact rotary tool, and a management system that communicates with the impact rotary tool. [Background technology]

[0002] Patent Document 1 discloses a rotary impact tool. In a torque management mode, the rotary impact tool of Patent Document 1 determines whether a screw member has been seated using a tightening torque value calculated by a torque estimation unit, and performs shutoff control to automatically stop the rotation of the motor by counting the number of impacts detected by an impact detection unit after the screw member has been seated.

[0003] In this rotary impact tool, a seating determination level is set, which is a parameter that determines a torque value for determining whether a screw is seated. Before starting work, a process manager sets the seating determination level in the rotary impact tool to obtain a predetermined target torque value. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-122392 Summary of the Invention [Problem to be solved by the invention]

[0005] When performing a tightening operation to tighten a fastening part to a work object, information on the time when the fastening part is seated on the work object can be used for various purposes. The time at which the fastening part should be determined to be seated during the tightening operation may vary depending on the purpose of using the information on the time of seating. The impact rotary tool of Patent Document 1 determines that the fastening part is seated when the tightening torque value reaches a preset seating determination level. Therefore, with this impact rotary tool, there is a possibility that the fastening part may be determined to be seated at a time other than the time intended by the user.

[0006] An object of the present disclosure is to provide an impact rotary tool, an impact rotary tool system, and a management system that are capable of adjusting the timing of seating detection to be closer to the timing intended by the user. [Means for solving the problem]

[0007] A rotary impact tool according to one aspect of the present disclosure includes a motor, an output shaft, an impact mechanism, and a seating detection unit. A memory unit; The output shaft holds a tool bit and rotates by the power of the motor. The impact mechanism performs an impact operation that generates an intermittent impact force on the output shaft using the power of the motor. The seating detection unit detects whether the fastening part rotated by the tool bit is seated on the workpiece. The memory unit stores information for calculating the time from the start of tightening the fastening part to the work object to the seating, and information for calculating the time from the seating to the end of tightening the fastening part to the work object. The seating detection unit has a plurality of seating detection modes. The rotary impact tool further includes an acquisition unit that acquires information indicating one seating detection mode selected from the plurality of seating detection modes. The seating detection unit detects the seating based on the seating detection mode indicated by the information acquired by the acquisition unit. The memory unit stores start time information indicating a start time of the tightening of the fastening part to the work object, seating time information indicating a seating time when the fastening part is seated, and end time information indicating a stop time of the tightening of the fastening part to the work object. The rotary impact tool performs at least one of a first determination and a second determination. The first determination includes determining that an incorrect fastening part was used when the time between the start time and the seating time is longer than a first threshold time or shorter than a second threshold time that is smaller than the first threshold time. The second determination includes determining that the tightening is defective when the time between the seating time and the end time is shorter than a third threshold time.

[0008] According to one aspect of the present disclosure, there is provided a rotary impact tool system including a motor, an output shaft, an impact mechanism, and a management system. and a first communication unit. The output shaft holds a tool bit and rotates by the power of the motor. The impact mechanism performs an impact operation that generates an intermittent impact force on the output shaft from the power of the motor. The first communication unit communicates with the management system. The management system includes a second communication unit, a seating detection unit, and A memory unit; The second communication unit communicates with the first communication unit of the rotary impact tool. The seating detection unit detects seating of a fastening part rotated by the tool bit held by the output shaft of the rotary impact tool on a work target, based on information received from the rotary impact tool via the second communication unit. The memory unit stores information for calculating the time from the start of tightening the fastening part to the work object to the seating, and information for calculating the time from the seating to the end of tightening the fastening part to the work object. The seating detection unit has a plurality of seating detection modes. The management system further includes an acquisition unit that acquires information indicating one seating detection mode selected from the plurality of seating detection modes. The seating detection unit detects the seating based on the seating detection mode indicated by the information acquired by the acquisition unit. The storage unit stores start time information indicating a start time of the tightening of the fastening part to the work object, seating time information indicating a seating time when the fastening part is seated, and end time information indicating a stop time of the tightening of the fastening part to the work object. The management system performs at least one of a first determination and a second determination. The first determination includes determining that an incorrect fastening part was used when the time between the start time and the seating time is longer than a first threshold time or shorter than a second threshold time that is smaller than the first threshold time. The second determination includes determining that the tightening is defective when the time between the seating time and the end time is shorter than a third threshold time.

[0009] A management system according to one aspect of the present disclosure is a management system for the rotary impact tool system. [Effects of the Invention]

[0010] According to the present disclosure, there is an advantage that the timing of seating detection can be made closer to the timing intended by the user. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic view of an impact rotary tool according to one embodiment. [Figure 2] FIG. 2 is a block diagram of an impact rotary tool system including the impact rotary tool. [Figure 3] FIG. 3 is a graph showing a waveform of a peak of the tightening torque value in the rotary impact tool. [Figure 4]FIG. 4 is a graph showing a waveform of the tightening torque value in the rotary impact tool in the vicinity of the A1 region in FIG. [Figure 5] FIG. 5 is a graph showing the waveform of the peak of the tightening torque value and the waveform of the rotation angle of the output shaft in the rotary impact tool. [Figure 6] FIG. 6 is a graph showing the relationship between the rotation angle of the output shaft and the tightening torque value in the rotary impact tool. [Figure 7] FIG. 7 is a graph showing the relationship between the rotation angle of the output shaft and the torque gradient in the rotary impact tool. [Figure 8] FIG. 8 is a block diagram of a rotary impact tool system including the rotary impact tool of the first modified example. DETAILED DESCRIPTION OF THE INVENTION

[0012] An impact rotary tool and an impact rotary tool system including the impact rotary tool according to an embodiment of the present disclosure will be described with reference to the drawings. The drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0013] (1) Overview As shown in FIGS. 1 and 2, the rotary impact tool 1 of this embodiment includes a motor 2, an output shaft 8, an impact mechanism 3, a seating detection unit 145, and an acquisition unit 146.

[0014] The output shaft 8 holds a tool bit 9. The tool bit 9 is, for example, a socket bit 91, a driver bit, etc. The output shaft 8 is rotated by the power of the motor 2.

[0015] The impact mechanism 3 performs an impact operation that generates an intermittent impact force on the output shaft 8 from the power of the motor 2.

[0016] The seating detection unit 145 detects seating of a fastening part (screw fastener) rotated by the tool bit 9 on a work object (a workpiece to be fastened). Examples of fastening parts include screws, bolts, and nuts. The work object is a workpiece (a workpiece to be processed) onto which the fastening part is fastened, such as wood, a resin material, or a metal material. In the present disclosure, "seating" can mean that a screw or bolt serving as a fastening part is screwed into the work object, causing the head of the fastening part to come into contact with the work object. Alternatively, in the present disclosure, "seating" can mean that a nut serving as a fastening part is screwed onto a bolt, causing the fastening part to come into contact with the work object.

[0017] The seating detection unit 145 has a plurality of seating detection modes.

[0018] The acquisition unit 146 acquires information indicating one seating detection mode selected from the plurality of seating detection modes.

[0019] The seating detection unit 145 detects whether a fastening part is seated on the work target based on the seating detection mode indicated by the information acquired by the acquisition unit 146.

[0020] In the impact rotary tool 1 of this embodiment, the seating detection unit 145 has a plurality of seating detection modes, and detects seating based on one of the plurality of seating detection modes indicated by the information acquired by the acquisition unit 146. Therefore, a user of the impact rotary tool 1 can set the impact rotary tool 1 so that seating is determined at a timing intended by the user. This makes it possible for the impact rotary tool 1 of the present disclosure to adjust the timing of seating detection closer to the timing intended by the user, thereby improving the usability of the impact rotary tool 1. Note that the "user" here may be a worker who performs tightening work using the impact rotary tool 1, or a manager who manages work using the impact rotary tool 1 using the management system 100.

[0021] (2)Details Hereinafter, a rotary impact tool 1 according to this embodiment and a rotary impact tool system 200 including the rotary impact tool 1 will be described with reference to the drawings.

[0022] As shown in FIG. 2, the rotary impact tool system 200 includes the rotary impact tool 1 and a management system 100.

[0023] (2.1) Rotary impact tool As shown in Figures 1 and 2, the impact rotary tool 1 includes a motor 2, an impact mechanism 3, an output shaft 8, a torque measurement unit 11, a rotation measurement unit 12, a trigger volume 13, a control unit 14, a memory unit 15, and a communication unit (hereinafter also referred to as the "first communication unit") 16.

[0024] As shown in FIG. 1, a rechargeable battery pack 10 is detachably attached to the impact rotary tool 1. The impact rotary tool 1 of this embodiment operates using the battery pack 10 as a power source. The battery pack 10 is a power source that supplies current to drive the motor 2. The battery pack 10 includes, for example, a battery pack configured by connecting a plurality of secondary batteries (e.g., lithium ion batteries) in series, and a case that houses the battery pack. The battery pack 10 is not a component of the impact rotary tool 1. However, the impact rotary tool 1 may include the battery pack 10 as a component.

[0025] The motor 2 is, for example, a brushless motor. The motor 2 includes a rotating shaft 21. The motor 2 converts the power supplied from the battery pack 10 into a rotational driving force for the rotating shaft 21.

[0026] The trigger volume 13 is an operating unit that accepts operations to control the rotation of the motor 2. By pulling the trigger volume 13, the motor 2 can be switched on and off. The rotation speed of the motor 2 can also be adjusted by the amount of pulling the trigger volume 13. The greater the amount of pulling, the faster the rotation speed of the motor 2.

[0027] The impact mechanism 3 performs an impact operation that generates an intermittent impact force on the output shaft 8 from the power of the motor 2.

[0028] 1, the impact mechanism 3 includes a drive shaft 31, a reducer 4, a hammer 5, an anvil 6, and a spring 7. For ease of explanation, the direction from the hammer 5 to the anvil 6 will also be referred to as the "forward" direction below.

[0029] The drive shaft 31 is disposed between the motor 2 and the output shaft 8 .

[0030] The reducer 4 reduces the rotation of the rotary shaft 21 of the motor 2 at a predetermined reduction ratio and transmits the rotation to the drive shaft 31 .

[0031] The hammer 5 moves relative to the anvil 6 and receives power from the motor 2 to apply a rotational blow (impact) to the anvil 6. The hammer 5 is movable in the axial direction (front-rear direction) of the drive shaft 31 relative to the drive shaft 31 and is rotatable relative to the drive shaft 31. As the hammer 5 moves along the axial direction of the drive shaft 31 toward or away from the anvil 6, the hammer 5 rotates relative to the drive shaft 31. The hammer 5 is also rotatable relative to the spring 7.

[0032] The anvil 6 is formed integrally with the output shaft 8. The anvil 6 faces the hammer 5 in the axial direction of the drive shaft 31. When the impact mechanism 3 is not performing an impact operation, the drive shaft 31, the hammer 5, and the anvil 6 rotate integrally.

[0033] The spring 7 is sandwiched between the reducer 4 and the hammer 5. In this embodiment, the spring 7 is, for example, a conical spring. The spring 7 applies a force to the hammer 5 in a direction along the axial direction of the drive shaft 31 toward the output shaft 8 (forward).

[0034] Hereinafter, movement of the hammer 5 in the axial direction of the drive shaft 31 toward the anvil 6 will also be referred to as "the hammer 5 moving forward." Also, below, movement of the hammer 5 in the axial direction of the drive shaft 31 away from the anvil 6 will also be referred to as "the hammer 5 moving backward."

[0035] In the impact mechanism 3, an impact operation is initiated when the load torque exceeds a predetermined value. That is, as the load torque increases, the component of the force generated between the hammer 5 and the anvil 6 that moves the hammer 5 backward also increases. When the load torque exceeds a predetermined value, the hammer 5 moves backward while compressing the spring 7. The hammer 5 then rotates while moving backward. Thereafter, the hammer 5 receives a return force from the spring 7 and moves forward. The hammer 5 then applies a rotational impact to the anvil 6 every time the drive shaft 31 rotates approximately half a turn.

[0036] In this way, in the impact mechanism 3, the hammer 5 repeatedly impacts the anvil 6. The torque generated by this impact makes it possible to tighten fastening parts such as screws, bolts, or nuts more strongly than in the absence of impact.

[0037] The output shaft 8 holds the tool bit 9. For example, a socket bit 91 is attached to the output shaft 8 as the tool bit 9. The output shaft 8 transmits the rotational driving force of the motor 2, which is transmitted from the drive shaft 31, to the tool bit 9. This causes the tool bit 9 to rotate. The tool bit 9 rotates while the tool bit 9 is in contact with a fastening part, thereby enabling the work of tightening the fastening part to a work object. The output shaft 8 also transmits the rotational impact force (impact force) transmitted from the impact mechanism 3 to the tool bit 9.

[0038] The bit 9 may be detachable from the output shaft 8, or may be fixed non-detachably to the output shaft 8. In this embodiment, the bit 9 such as the socket bit 91 is not a component of the rotary impact tool 1. However, the rotary impact tool 1 may include the bit 9 as a component.

[0039] The torque measurement unit 11 measures the tightening torque applied by the output shaft 8. The tightening torque is the torque applied to the head of a fastening part (nut) or a fastening part (screw, bolt) during tightening. In this embodiment, the torque measurement unit 11 includes, for example, a magnetostrictive strain sensor capable of detecting torsional strain. The torque measurement unit 11 detects a change in magnetic permeability corresponding to the strain of the output shaft 8 caused by torque applied to the output shaft 8 using a coil installed in a non-rotating portion. In other words, the torque measurement unit 11 indirectly measures the tightening torque by measuring the torque applied to the output shaft 8 based on the torsion of the output shaft 8. The torque measurement unit 11 outputs a voltage signal proportional to the strain of the output shaft 8 to the control unit 14. Hereinafter, the signal output by the torque measurement unit 11 to the control unit 14 will also be referred to as a "first signal S1."

[0040] The rotation measuring unit 12 measures the degree of rotation of the output shaft 8. The rotation measuring unit 12 includes, for example, a rotary encoder. The rotation measuring unit 12 outputs a digital signal indicating the measured rotation angle of the output shaft 8 to the control unit 14. Hereinafter, the signal output by the rotation measuring unit 12 to the control unit 14 will also be referred to as a "second signal S2."

[0041] The storage unit 15 is configured by, for example, a semiconductor memory. The storage unit 15 stores various information. The storage unit 15 stores information necessary for the operation of the control unit 14. The storage unit 15 stores information received by the first communication unit 16. The storage unit 15 stores information generated by the control unit 14.

[0042] The first communication unit 16 is a communication interface that performs wireless communication in accordance with standards such as Wi-Fi (registered trademark), Bluetooth (registered trademark), ZigBee (registered trademark), or low-power wireless (specified low-power wireless) that does not require a license. Here, the first communication unit 16 performs wireless communication with the management system 100, but may also be connected to the management system 100 by a wire and perform wired communication with the management system 100.

[0043] The control unit 14 includes a computer system having one or more processors and a memory. At least some of the functions of the control unit 14 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, or may be provided via a telecommunications line such as the Internet, or may be provided by being recorded on a non-transitory recording medium such as a memory card.

[0044] 2, the control unit 14 has a drive control unit 141, a torque calculation unit 142, an impact detection unit 143, a rotation angle calculation unit 144, a seating detection unit 145, an acquisition unit 146, a storage processing unit 147, and a communication processing unit 148. The drive control unit 141, the torque calculation unit 142, the impact detection unit 143, the rotation angle calculation unit 144, the seating detection unit 145, the acquisition unit 146, the storage processing unit 147, and the communication processing unit 148 do not represent physical components, but rather represent functions realized by the control unit 14.

[0045] The drive control unit 141 controls the operation of the motor 2. The drive control unit 141 controls the on / off of the motor 2 in response to an operation performed on the trigger volume 13. The drive control unit 141 controls the voltage applied to the motor 2 based on the pull amount of the trigger volume 13, thereby controlling the rotation speed of the motor 2.

[0046] The torque calculation unit 142 calculates a torque value (hereinafter also referred to as "tightening torque value") based on the measurement results from the torque measurement unit 11. The tightening torque value is the value of the torque acting on the fastening part in the tightening operation, estimated from the distortion of the output shaft 8. The torque calculation unit 142 acquires the first signal S1 output from the torque measurement unit 11, and calculates the tightening torque value based on the distortion of the output shaft 8 indicated by the acquired first signal S1. When the impact mechanism 3 performs an impact operation, the tightening torque value indicates the tightening torque for each impact that the impact mechanism 3 applies to the output shaft 8.

[0047] Fig. 3 shows a graph G1 plotting an outline of the change over time in the peak tightening torque value calculated by the torque calculation unit 142 when tightening work is performed to tighten a fastening part to a work object using the impact rotary tool 1. Fig. 4 shows a graph G2 that outlines the change over time in the tightening torque value near area A1 in the example of Fig. 3. The examples of Figs. 3 and 4 show that the motor 2 starts operating at time t0, and the impact mechanism 3 starts its impact operation at time t1.

[0048] As shown in Fig. 3, during a period T1 before the time t1 when the impact mechanism 3 starts the impact operation, the tightening torque value is maintained at a substantially constant value (a value close to 0) that corresponds to the load torque for rotating the fastening part. During a period T2 after the time t1 when the impact mechanism 3 starts the impact operation, the peak of the tightening torque value (the peak value of the mountain-shaped waveform shown in Fig. 4) gradually increases as the fastening part is tightened.

[0049] The impact detection unit 143 detects the occurrence of an impact applied to the output shaft 8 by the impact mechanism 3. In this embodiment, the impact detection unit 143 detects the occurrence of an impact based on the measurement results of the torque measurement unit 11. Specifically, the impact detection unit 143 compares the tightening torque value calculated by the torque calculation unit 142 with a predetermined threshold (impact threshold Th0; see FIG. 4). The impact detection unit 143 determines that an impact has occurred when it detects that the tightening torque value has become equal to or greater than the impact threshold Th0 (crossing the impact threshold Th0). However, this is not limited to this, and the impact detection unit 143 may also compare the amount of change (differential value) in the tightening torque value over time with a threshold, and determine that an impact has occurred when it detects that the amount of change in the tightening torque value has become equal to or greater than the threshold.

[0050] The rotation angle calculation unit 144 calculates the rotation angle of the output shaft 8. The rotation angle calculation unit 144 calculates the rotation angle of the output shaft 8 based on the measurement result from the rotation measurement unit 12. The rotation angle calculation unit 144 acquires the second signal S2 output from the rotation measurement unit 12, and calculates the rotation angle of the output shaft 8 based on the acquired second signal S2.

[0051] 5 shows graph G3, which plots an outline of the change over time in the rotation angle of the output shaft 8 calculated by the rotation angle calculation unit 144, together with graph G1, when performing a tightening operation to tighten a fastening part to a work target using the impact rotary tool 1. The example in FIG. 5 shows that the motor 2 starts operating at time t0, and the impact mechanism 3 starts its impact operation at time t1.

[0052] During a period T1 before the time t1 at which the impact mechanism 3 starts the impact operation, the output shaft 8 rotates integrally with the anvil 6, the hammer 5, and the drive shaft 31. Therefore, during this period T1, the rotation angle of the output shaft 8 increases at a constant rate, as shown in FIG.

[0053] During a period T2 after time t1 when the impact mechanism 3 starts the impact operation, the output shaft 8 (anvil 6) rotates by a predetermined angle with each impact from the hammer 5, approximately every half rotation of the drive shaft 31. Therefore, during this period T2, as shown in Fig. 5, the rotation angle of the output shaft 8 increases at a constant rate that is smaller than that during the period T1 up to time t1.

[0054] The seating detection unit 145 detects whether the fastening part rotated by the tool bit 9 is seated on the work target.

[0055] The seating detection unit 145 has a plurality of seating detection modes. In this embodiment, the plurality of seating detection modes include an impact reference mode M1, a torque value reference mode M2, and a torque gradient reference mode M3.

[0056] The impact reference mode M1 is a mode in which seating is detected based on the start time of the impact operation by the impact mechanism 3. In the impact reference mode M1, the seating detection unit 145 detects seating based on the detection result of the impact detection unit 143. In the impact reference mode M1, the seating detection unit 145 determines, for example, the time when the impact mechanism 3 starts the impact operation as the time when the fastening part seats on the work object (hereinafter also referred to as the "seat-contact time"). For example, in the example of FIGS. 3 and 4 , in the impact reference mode M1, the seating detection unit 145 determines time t1 as the seat-contact time. However, without being limited to this, in the impact reference mode M1, the seating detection unit 145 may determine, as the seat-contact time, any time different from time t1 when the impact mechanism 3 starts the impact operation and determined based on time t1 when the impact mechanism 3 starts the impact operation. For example, in the impact reference mode M1, the seating detection unit 145 may determine the time when the second impact is detected (time t10 in Figure 4) as the seating time, or may determine the time when a predetermined time is added or subtracted from time t1 when the impact mechanism 3 starts the impact operation as the seating time.

[0057] The torque value reference mode M2 ​​is a mode in which seating is detected based on the tightening torque value. In the torque value reference mode M2, the seating detection unit 145 detects seating based on the detection result from the torque measurement unit 11. In the torque value reference mode M2, the seating detection unit 145 detects seating based on the tightening torque value calculated by the torque calculation unit 142. In the torque value reference mode M2, the seating detection unit 145 detects seating based on the comparison result between the tightening torque value and a threshold value. In the torque value reference mode M2, the seating detection unit 145 determines, for example, the time when the tightening torque value calculated by the torque calculation unit 142 becomes equal to or greater than a predetermined threshold value (torque threshold value Th10) as the time when a person sits down. For example, in the example of FIG. 3, in the torque value reference mode M2, the seating detection unit 145 determines, as the time when a person sits down, the time t2 when the tightening torque value becomes equal to or greater than the torque threshold value Th10.

[0058] The torque gradient reference mode M3 is a mode in which seating is detected based on the relationship between the tightening torque value and the rotation angle of the output shaft 8. In the torque gradient reference mode M3, the seating detection unit 145 detects seating based on the detection results from the torque measurement unit 11 and the detection results from the rotation measurement unit 12. In the torque gradient reference mode M3, the seating detection unit 145 determines seating based on the tightening torque value calculated by the torque calculation unit 142 and the rotation angle calculated by the rotation angle calculation unit 144. In the torque gradient reference mode M3, the seating detection unit 145 detects seating based on, for example, the amount of change in the tightening torque value with respect to the rotation angle (hereinafter also referred to as the "torque gradient").

[0059] Fig. 6 shows a graph G4 in which the tightening torque value is plotted against the rotation angle of the output shaft 8. Fig. 7 shows a graph G5 in which the torque gradient is plotted against the rotation angle of the output shaft 8. In Figs. 6 and 7, point Ps indicates the so-called snug point (the point where snug torque (the tightening torque required to bring the bearing surfaces into close contact in the rotation angle tightening method) is applied).

[0060] In the torque gradient reference mode M3, the seating detection unit 145 determines, for example, the time when the torque gradient becomes equal to or greater than a predetermined threshold (torque gradient threshold Th20) as the seating time. For example, in the example of Fig. 7, in the torque gradient reference mode M3, the seating detection unit 145 determines, for example, the time corresponding to the rotation angle R1 at which the torque gradient becomes equal to or greater than the torque gradient threshold Th20 as the seating time. However, without being limited to this, in the torque gradient reference mode M3, the seating detection unit 145 may determine, for example, the time corresponding to the rotation angle R2 at which the amount of change in the torque gradient with respect to the rotation angle becomes approximately zero as the seating time.

[0061] The acquisition unit 146 acquires information indicating one seating detection mode selected from a plurality of (here, three) seating detection modes (hereinafter also referred to as "designation information"). Here, the designation information is information for designating any one of the plurality of seating detection modes.

[0062] In this embodiment, the designation information is transmitted from the management system 100. That is, a user (administrator) of the management system 100 operates the management system 100 to select one seating detection mode from a plurality of seating detection modes, and causes the management system 100 to transmit designation information indicating the selected seating detection mode to the rotary impact tool 1. As a result, the acquisition unit 146 acquires the designation information.

[0063] The seating detection unit 145 detects seating based on the seating detection mode indicated by the designation information acquired by the acquisition unit 146. For example, when the impact reference mode M1 is designated in the designation information, the seating detection unit 145 operates to detect seating based on the detection result of the impact detection unit 143.

[0064] The drive control unit 141 may have a function to stop the operation of the motor 2 regardless of the operation of the trigger volume 13, based on the time point of seating detected by the seating detection unit 145. For example, the drive control unit 141 may stop the operation of the motor 2 regardless of the operation of the trigger volume 13 when the impact detection unit 143 detects that a predetermined number of impacts have occurred after the seating detection unit 145 detects that a person is seated. Alternatively, the drive control unit 141 may stop the operation of the motor 2 regardless of the operation of the trigger volume 13 when the total of the rotation angles calculated by the rotation angle calculation unit 144 reaches a predetermined angle after the seating detection unit 145 detects that a person is seated.

[0065] The storage processing unit 147 stores various information in the storage unit 15.

[0066] The memory processing unit 147 stores information indicating the start time of tightening the fastening part to the work target (hereinafter also referred to as "start time information") in the memory unit 15. In one example, the start time information is time information. For example, the memory processing unit 147 may store the time when the motor 2 starts operating due to the retraction of the trigger volume 13 in the memory unit 15 as the start time of tightening the fastening part to the work target. Alternatively, the memory processing unit 147 may store the time when the retraction of the trigger volume 13 starts in the memory unit 15 as the start time of tightening the fastening part to the work target.

[0067] The memory processing unit 147 stores information indicating the time of sitting down (hereinafter also referred to as "sitting down time information") in the memory unit 15. In one example, the sitting down time information is time information. For example, the memory processing unit 147 may store the sitting down time detected by the seating detection unit 145 in the memory unit 15.

[0068] The memory processing unit 147 stores information indicating the end point of tightening of the fastening part to the work object (hereinafter also referred to as "end point information") in the memory unit 15. In one example, the end point information is time information. For example, the memory processing unit 147 may store the point in time when the trigger volume 13 is released and the motor 2 stops operating as the end point of tightening of the fastening part to the work object in the memory unit 15. Alternatively, the memory processing unit 147 may store the point in time when the drive control unit 141 stops operating the motor 2 based on the seating point detected by the seating detection unit 145 as the end point of tightening of the fastening part to the work object in the memory unit 15.

[0069] In short, the memory processing unit 147 stores information for determining the time from the start of tightening of the fastening part to the work object until it is seated in the memory unit 15. The memory processing unit 147 also stores information for determining the time from the seating until it is finished tightening the fastening part to the work object in the memory unit 15.

[0070] The communication processing unit 148 controls the first communication unit 16 to transmit and receive various information to and from the management system 100 .

[0071] In response to a request from the management system 100, the communication processing unit 148 transmits various pieces of information stored in the storage unit 15 to the management system 100. For example, the communication processing unit 148 causes the first communication unit 16 to transmit start time information, seating time information, end time information, etc. to the management system 100.

[0072] The communication processing unit 148 receives various information from the management system 100 via the first communication unit 16. For example, the communication processing unit 148 causes the first communication unit 16 to receive designation information transmitted from the management system 100.

[0073] (2.2) Management System The management system 100 manages the rotary impact tool 1. The management system 100 manages work performed using the rotary impact tool 1.

[0074] The management system 100 is, for example, a server, and may also be an information terminal such as a personal computer (PC), a smartphone, or a tablet terminal.

[0075] As shown in FIG. 2, the management system 100 includes a communication unit (hereinafter also referred to as a “second communication unit”) 101, a display unit 102, an operation unit 103, a processing unit 104, and a memory unit 105.

[0076] The second communication unit 101 communicates with the first communication unit 16 of the rotary impact tool 1. The second communication unit 101 is a communication interface that performs wireless communication in accordance with standards such as Wi-Fi, Bluetooth, ZigBee, or low-power radio that does not require a license (specified low-power radio). Here, the second communication unit 101 performs wireless communication with the first communication unit 16 of the rotary impact tool 1, but the second communication unit 101 may be connected to the first communication unit 16 of the rotary impact tool 1 by a wire and perform wired communication.

[0077] The display unit 102 includes, for example, a liquid crystal display or an organic EL display. The display unit 102 of this embodiment displays various information. For example, the display unit 102 displays information prompting the user to input specified information. The display unit 102 displays start time information, seating time information, end time information, etc. received from the rotary impact tool 1.

[0078] The operation unit 103 receives operations from a user. The operation unit 103 includes appropriate mechanical switches, pointing devices, buttons, etc. The operation unit 103 may include operation buttons displayed on the screen of the display unit 102.

[0079] The display unit 102 and the operation unit 103 may be an integrated touch panel display.

[0080] The processing unit 104 includes a computer system having one or more processors and a memory. At least some of the functions of the processing unit 104 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, or may be provided via a telecommunications line such as the Internet, or may be recorded on a non-transitory recording medium such as a memory card and provided. The processing unit 104 controls the operations of the second communication unit 101, the display unit 102, and the operation unit 103.

[0081] The storage unit 105 is configured by, for example, a semiconductor memory, and stores various types of information.

[0082] The management system 100 is used to manage work using the impact rotary tool 1. The management system 100 transmits designation information to the impact rotary tool 1. The management system 100 also receives start time information, seating time information, and end time information from the impact rotary tool 1. The management system 100 associates the start time information, seating time information, and end time information received from the impact rotary tool 1 with the identification information of the impact rotary tool 1, and stores them in the memory unit 105.

[0083] The management system 100 may be able to display the start time information, the seating time information, and the end time information in a list in a table format on the display unit 102. This allows the user of the management system 100 to discover the possibility that an incorrect fastening part was used (e.g., a screw that is longer / shorter than normal was used) when, for example, the time between the start time and the seating time is longer or shorter than normal. Furthermore, the user of the management system 100 may discover the possibility that the fastening part was not sufficiently tightened, resulting in a tightening defect, when, for example, the time between the seating time and the end time is shorter than normal. Note that the management system 100 may display the start time information, the seating time information, and the end time information in a format other than a table format, such as a graph format.

[0084] The management system 100 may have a function of determining whether or not there is a possibility of a defect in the work using the impact rotary tool 1, based on the start time information, the seating time information, and the end time information. Defects in the work using the impact rotary tool 1 include, for example, the above-mentioned incorrect fastening parts and improper tightening of the fastening parts. When the management system 100 determines that there is a possibility of a defect in the work using the impact rotary tool 1, it may notify the user of this by displaying a message or by sound. Note that the possibility of a defect in the work using the impact rotary tool 1 may be determined by the control unit 14 of the impact rotary tool 1. In this case, the impact rotary tool 1 may further include a notification unit that notifies the operator of the possibility of a defect when the control unit 14 determines that there is a possibility of a defect in the work.

[0085] The management system 100 may manage a plurality of rotary impact tools 1. The management system 100 may manage the plurality of rotary impact tools 1 individually using unique identification information assigned to each of the plurality of rotary impact tools 1.

[0086] As described above, in the impact rotary tool 1 and the impact rotary tool system 200 of this embodiment, the seating detection unit 145 has multiple seating detection modes and detects seating based on one of the multiple seating detection modes indicated by the designation information acquired by the acquisition unit 146. The multiple seating detection modes include an impact reference mode M1, a torque value reference mode M2, and a torque gradient reference mode M3. The impact reference mode M1 has the advantage of detecting seating based on, for example, the start of an impact operation, thereby enabling seating to be detected at a timing closer to the operator's actual perception. However, the impact reference mode M1 may erroneously determine seating if an impact operation occurs before seating due to, for example, foreign matter getting caught. The torque value reference mode M2 ​​has the advantage of reducing the possibility of erroneously determining an impact operation due to, for example, foreign matter getting caught as seating by appropriately setting the torque threshold value Th10. The torque gradient reference mode M3 has the advantage that, for example, the result of the seating detection time point can be used as a tightening index for the rotation angle method or torque gradient method specified in the JIS B1083:2008 standard. As such, each of the multiple seating detection modes has its own advantages. In the impact rotary tool system 200 of this embodiment, the impact rotary tool 1 is provided with the seating detection unit 145 and the acquisition unit 146, allowing the user to select the optimal mode in consideration of the above advantages, etc. This improves the usability of the impact rotary tool 1.

[0087] (3) Variations The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modified examples of the embodiment are listed below. Hereinafter, the above embodiment may also be referred to as a "basic example." The basic example and the modified examples described below can be applied in appropriate combination.

[0088] The control unit 14 of the rotary impact tool 1 and the processing unit 104 of the management system 100 in the present disclosure include a computer system. The computer system is primarily composed of a processor and memory as hardware. The functions of the control unit 14, processing unit 104, etc. in the present disclosure are realized by the processor executing a program stored in the memory of the computer system. The program may be pre-stored in the memory of the computer system, provided via a telecommunications line, or provided in a non-transitory recording medium readable by the computer system, such as a memory card, optical disk, or hard disk drive. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits, such as ICs and LSIs, are referred to by different names depending on the degree of integration, and include integrated circuits called system LSIs, very large-scale integrations (VLSIs), and ultra-large-scale integrations (ULSIs). Furthermore, field-programmable gate arrays (FPGAs), which are programmed after the LSI is manufactured, or logic devices capable of reconfiguring the connections within the LSI or the circuit partitions within the LSI, can also be used as processors. The electronic circuits may be integrated into one chip or distributed across multiple chips. The chips may be integrated into one device or distributed across multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0089] Furthermore, it is not essential for the impact rotary tool 1 that multiple functions of the control unit 14 of the impact rotary tool 1 are concentrated in one housing, and the components of the control unit 14 may be distributed across multiple housings. Furthermore, at least some of the functions of the control unit 14 may be realized by the cloud (cloud computing) or the like. Conversely, multiple functions of the control unit 14 may be concentrated in one housing, as in the basic example.

[0090] (3.1) Variation 1 The impact rotary tool system 200 of this modified example will be described with reference to Fig. 8. The impact rotary tool system 200 of this modified example differs from the impact rotary tool system 200 of the basic example in that the impact rotary tool 1 does not include a seating detection unit and an acquisition unit, and instead the management system 100 includes a seating detection unit 106 and an acquisition unit 107. In the impact rotary tool system 200 of this modified example, components similar to those of the impact rotary tool system 200 of the basic example are denoted by the same reference numerals, and descriptions thereof may be omitted as appropriate.

[0091] As shown in FIG. 8, in the rotary impact tool 1 of this modified example, the control unit 14 includes a drive control unit 141, a torque calculation unit 142, an impact detection unit 143, a rotation angle calculation unit 144, a memory processing unit 147, and a communication processing unit 148.

[0092] The drive control unit 141 controls the operation of the motor 2. The torque calculation unit 142 calculates the tightening torque value based on the measurement result by the torque measurement unit 11. The impact detection unit 143 detects the occurrence of an impact applied to the output shaft 8 by the impact mechanism 3. The rotation angle calculation unit 144 calculates the rotation angle of the output shaft 8 based on the measurement result by the rotation measurement unit 12.

[0093] The communication processing unit 148 transmits the tightening torque value calculated by the torque calculation unit 142, information on the occurrence of the impact detected by the impact detection unit 143, and the rotation angle of the output shaft 8 calculated by the rotation angle calculation unit 144 to the management system 100.

[0094] As shown in FIG. 9, the processing unit 104 of the management system 100 of this modified example includes a seating detection unit 106 and an acquisition unit 107.

[0095] The seating detection unit 106 has a plurality of seating detection modes, including an impact reference mode M1, a torque value reference mode M2, and a torque gradient reference mode M3.

[0096] The acquiring unit 107 acquires information (designation information) indicating one seating detection mode selected from the plurality of seating detection modes. The designation information is generated based on an appropriate operation performed on the operating unit 103 of the management system 100, for example, and transmitted to the acquiring unit 107.

[0097] The seating detection unit 106 detects seating based on the seating detection mode indicated by the designation information acquired by the acquisition unit 107.

[0098] In this modified impact rotary tool system 200, it is also possible to bring the timing of seating detection closer to the timing intended by the user (the administrator who uses the management system 100 to manage work using the impact rotary tool 1).

[0099] In addition, the management system 100 may be equipped with a torque calculation unit 142, an impact detection unit 143, and a rotation angle calculation unit 144, in which case the impact rotary tool 1 may transmit the first signal S1 and the second signal S2 to the management system 100.

[0100] (3.2) Other Modifications In one modified example, the seating detection unit 145 may have a seating detection mode other than the impact reference mode M1, the torque value reference mode M2, and the torque gradient reference mode M3. For example, the multiple seating detection modes of the seating detection unit 145 may detect seating based on the measurement results of the rotation measurement unit 12. If the type (length, pitch, etc.) of the fastening part (screw, bolt) is known, it is possible to detect seating based on the rotation angle of the output shaft 8 (total rotation angle of the output shaft 8; total number of rotations).

[0101] In one variation, the plurality of seating detection modes may include the torque value reference mode M2 ​​and the torque gradient reference mode M3, but may not include the impact reference mode M1.

[0102] In one modification, the plurality of seating detection modes may include the impact reference mode M1 and the torque gradient reference mode M3, but may not include the torque value reference mode M2.

[0103] In one modified example, the plurality of seating detection modes may include the impact reference mode M1 and the torque value reference mode M2, but may not include the torque gradient reference mode M3. In this case, the rotary impact tool 1 may not be provided with the rotation measurement unit 12.

[0104] In one modified example, the threshold value in the impact reference mode M1 (impact threshold value Th0) may be changeable by the user. For example, the threshold value (impact threshold value Th0) may be changeable based on an instruction from the management system 100.

[0105] In one modified example, the threshold value (torque threshold value Th10) in the torque value reference mode M2 ​​may be changeable by the user. For example, the threshold value (torque threshold value Th10) may be changeable based on an instruction from the management system 100.

[0106] In one modified example, the threshold value (torque gradient threshold value Th20) in the torque gradient reference mode M3 may be changeable by the user. For example, the threshold value (torque gradient threshold value Th20) may be changeable based on an instruction from the management system 100.

[0107] In one variant, the impact detection unit 143 may detect the occurrence of an impact applied to the output shaft 8 by the impact mechanism 3 based on information other than the measurement results of the torque measurement unit 11, for example, the detection results of a shock sensor such as a piezoelectric shock sensor, or fluctuations in the motor 2 (fluctuations in current, fluctuations in speed, etc.).

[0108] In one modification, the torque measuring unit 11 is not limited to a magnetostrictive sensor, and may include any other torque sensor such as an optical sensor.

[0109] In one modified example, the rotation measuring unit 12 is not limited to a sensor that measures the rotation degree of the output shaft 8, but may be a sensor that measures the rotation degree of the motor 2. It is possible to indirectly measure the rotation degree of the output shaft 8 from the rotation degree of the motor 2 and the reduction ratio of the reducer 4.

[0110] In one modified example, the rotary impact tool 1 may include an operation unit (switch, button, etc.) that is operated by a worker who performs work using the rotary impact tool 1 to generate designation information.

[0111] In one modified example, the designation information may include two or more seating detection modes, in which case the seating detection unit 145 may detect seating based on the detection results (e.g., logical sum or logical product) in the two or more seating detection modes indicated by the designation information.

[0112] (4) Aspects As is clear from the above-described embodiments and modifications, the present specification discloses the following aspects.

[0113] The rotary impact tool (1) of the first aspect includes a motor (2), an output shaft (8), an impact mechanism (3), and a seating detection unit (145). The output shaft (8) holds a tool bit (9) and rotates by the power of the motor (2). The impact mechanism (3) performs an impact operation that generates intermittent impact forces in the output shaft (8) using the power of the motor (2). The seating detection unit (145) detects seating of a fastening part rotated by the tool bit (9) on a work target. The seating detection unit (145) has multiple seating detection modes. The rotary impact tool (1) further includes an acquisition unit (146) that acquires information indicating one seating detection mode selected from the multiple seating detection modes. The seating detection unit (145) detects seating based on the seating detection mode indicated by the information acquired by the acquisition unit (146).

[0114] According to this aspect, the timing of seating detection can be made closer to the timing intended by the user, and the usability of the rotary impact tool (1) can be improved.

[0115] In the rotary impact tool (1) of the second aspect, in the first aspect, the plurality of seating detection modes includes an impact reference mode (M1) that detects seating based on the start time of the impact operation.

[0116] According to this embodiment, the user can select the impact reference mode (M1).

[0117] In the third aspect of the impact rotary tool (1), in the first or second aspect, the plurality of seating detection modes includes a torque value reference mode (M2) that detects seating based on a torque value indicating the tightening torque by the output shaft (8).

[0118] According to this embodiment, the user can select the torque value reference mode (M2).

[0119] In the fourth aspect of the impact rotary tool (1), in any one of the first to third aspects, the plurality of seating detection modes includes a torque gradient reference mode (M3) that detects seating based on the relationship between a torque value indicating the tightening torque by the output shaft (8) and the rotation angle of the output shaft (8).

[0120] According to this embodiment, the user can select the torque gradient reference mode (M3).

[0121] In the fifth aspect of the impact rotary tool (1), in the first aspect, the plurality of seating detection modes include an impact reference mode (M1) that detects seating based on the start time of the impact operation, and a torque value reference mode (M2) that detects seating based on a torque value indicating the tightening torque by the output shaft (8).

[0122] According to this aspect, the user can select the seating detection mode from the impact reference mode (M1) and the torque value reference mode (M2), improving the ease of use of the impact rotary tool 1. Furthermore, in the impact reference mode (M1) and the torque value reference mode (M2), seating can be detected from the measurement result of the torque measurement unit 11 without using the measurement result of the rotation measurement unit 12, which makes it possible to simplify the impact rotary tool 1.

[0123] In the sixth aspect of the impact rotary tool (1), in the first aspect, the multiple seating detection modes include an impact reference mode (M1) that detects seating based on the start time of the impact operation, and a torque gradient reference mode (M3) that detects seating based on the relationship between a torque value indicating the tightening torque by the output shaft (8) and the rotation angle of the output shaft (8).

[0124] According to this aspect, the user can select the seating detection mode from the impact reference mode (M1) and the torque gradient reference mode (M3), thereby improving the usability of the impact rotary tool (1).

[0125] In the seventh aspect of the impact rotary tool (1), in the first aspect, the multiple seating detection modes include an impact reference mode (M1) that detects seating based on the start time of the impact operation, a torque value reference mode (M2) that detects seating based on a torque value indicating the tightening torque by the output shaft (8), and a torque gradient reference mode (M3) that detects seating based on the relationship between the torque value indicating the tightening torque by the output shaft (8) and the rotation angle of the output shaft (8).

[0126] According to this aspect, the user can select the seating detection mode from the impact reference mode (M1), the torque value reference mode (M2), and the torque gradient reference mode (M3), thereby improving the usability of the impact rotary tool (1).

[0127] The impact rotary tool (1) of the eighth aspect is any one of the first to seventh aspects, and further includes a memory unit (15) that stores information for determining the time from the start of tightening of the fastening part to the work object until it is seated.

[0128] According to this aspect, it is possible to verify defects that occur during the time from the start of tightening to seating.

[0129] The impact rotary tool (1) of the ninth aspect, in any one of the first to eighth aspects, further comprises a memory unit (15) for storing information for determining the time from seating to completion of tightening of the fastening part to the work object.

[0130] According to this aspect, it is possible to verify defects that occur during the time from seating to the end of tightening.

[0131] A tenth aspect of the present invention provides a rotary impact tool system (200) including a rotary impact tool (1) and a management system (100). The rotary impact tool (1) includes a motor (2), an output shaft (8), an impact mechanism (3), and a first communication unit (16). The output shaft (8) holds a tool bit (9) and is rotated by the power of the motor (2). The impact mechanism (3) performs an impact operation that generates intermittent impact forces in the output shaft (8) using the power of the motor (2). The first communication unit (16) communicates with the management system (100). The management system (100) includes a second communication unit (101) and a seating detection unit (106). The second communication unit (101) communicates with the first communication unit (16) of the rotary impact tool (1). The seating detection unit (106) detects seating of a fastening part rotated by the bit (9) held on the output shaft (8) of the impact rotary tool (1) on a work target based on information received from the impact rotary tool (1) via the second communication unit (101). The seating detection unit (106) has a plurality of seating detection modes. The management system (100) further includes an acquisition unit (107) that acquires information indicating one seating detection mode selected from the plurality of seating detection modes. The seating detection unit (106) detects seating based on the seating detection mode indicated by the information acquired by the acquisition unit (107).

[0132] According to this aspect, the timing of seating detection can be made closer to the timing intended by the user, and the usability of the rotary impact tool (1) can be improved.

[0133] The management system (100) of the eleventh embodiment is the management system (100) in the impact rotary tool system (200) of the tenth embodiment. [Explanation of symbols]

[0134] 1. Rotary impact tool 2 motors 3 Impact mechanism 8 output shaft 145,106 Seating detection unit 146,107 Acquisition Department 15 Storage section 16 First Communications Department 100 Management Systems 101 Second Communications Department 200 Impact Rotary Tool System M1 Impact Reference Mode M2 Torque value reference mode M3 Torque gradient reference mode

Claims

1. A rotary impact tool, A motor; an output shaft that holds a tool bit and is rotated by the power of the motor; an impact mechanism that performs an impact operation to generate intermittent impact force on the output shaft from the power of the motor; a seating detection unit that detects seating of a fastening component rotated by the tool bit on a work target; a storage unit that stores information for calculating the time from the start of fastening the fastening part to the work object until the seating, and information for calculating the time from the seating until the end of fastening the fastening part to the work object; Equipped with the seating detection unit has a plurality of seating detection modes, The rotary impact tool further includes an acquisition unit that acquires information indicating one seating detection mode selected from the plurality of seating detection modes, the seating detection unit detects the seating based on the seating detection mode indicated by the information acquired by the acquisition unit, The storage unit start time information indicating a start time of the fastening of the fastening part to the work object; Seating time information indicating the seating time when the fastening part was seated; and end time point information indicating an end time point of the fastening of the fastening part to the work object, The rotary impact tool performs at least one of a first determination and a second determination, the first determination includes determining that an incorrect fastening part was used when the time between the start time point and the seating time point is longer than a first threshold time or shorter than a second threshold time that is smaller than the first threshold time; The second determination includes determining that the tightening is insufficient when the time between the seating time and the end time is shorter than a third threshold time. Rotary impact tool.

2. the plurality of seating detection modes include an impact reference mode in which the seating is detected based on a start time of the impact motion; The rotary impact tool according to claim 1 .

3. the plurality of seating detection modes include a torque value reference mode in which the seating is detected based on a torque value indicating a tightening torque applied by the output shaft. The rotary impact tool according to claim 1 or 2.

4. the plurality of seating detection modes include a torque gradient reference mode in which the seating is detected based on a relationship between a torque value indicating a tightening torque applied by the output shaft and a rotation angle of the output shaft. The rotary impact tool according to any one of claims 1 to 3.

5. The plurality of seating detection modes include: an impact reference mode in which the seating is detected based on the start time of the impact motion; a torque value reference mode in which the seating is detected based on a torque value indicating a tightening torque by the output shaft; Including, The rotary impact tool according to claim 1 .

6. The plurality of seating detection modes include: an impact reference mode in which the seating is detected based on the start time of the impact motion; a torque gradient reference mode in which the seating is detected based on a relationship between a torque value indicating a tightening torque by the output shaft and a rotation angle of the output shaft; Including, The rotary impact tool according to claim 1 .

7. The plurality of seating detection modes include: an impact reference mode in which the seating is detected based on the start time of the impact motion; a torque value reference mode in which the seating is detected based on a torque value indicating a tightening torque by the output shaft; a torque gradient reference mode in which the seating is detected based on a relationship between a torque value indicating a tightening torque by the output shaft and a rotation angle of the output shaft; Including, The rotary impact tool according to claim 1 .

8. A rotary impact tool; A management system; Equipped with The impact rotary tool is A motor; an output shaft that holds a tool bit and is rotated by the power of the motor; an impact mechanism that performs an impact operation to generate intermittent impact force on the output shaft from the power of the motor; a first communication unit that communicates with the management system; Equipped with The management system includes: a second communication unit that communicates with the first communication unit of the rotary impact tool; a seating detection unit that detects seating of a fastening component rotated by the tool bit held on the output shaft of the impact rotary tool on a work target based on information received from the impact rotary tool via the second communication unit; a storage unit that stores information for calculating the time from the start of fastening the fastening part to the work object until the seating, and information for calculating the time from the seating until the end of fastening the fastening part to the work object; Equipped with the seating detection unit has a plurality of seating detection modes, the management system further includes an acquisition unit that acquires information indicating one seating detection mode selected from the plurality of seating detection modes, the seating detection unit detects the seating based on the seating detection mode indicated by the information acquired by the acquisition unit, The storage unit start time information indicating a start time of the fastening of the fastening part to the work object; Seating time information indicating the seating time when the fastening part was seated; and end time point information indicating an end time point of the fastening of the fastening part to the work object, the management system performs at least one of a first determination and a second determination; the first determination includes determining that an incorrect fastening part was used when the time between the start time point and the seating time point is longer than a first threshold time or shorter than a second threshold time that is smaller than the first threshold time; The second determination includes determining that the tightening is insufficient when the time between the seating time and the end time is shorter than a third threshold time. Impact rotary tool system.

9. A management system in the impact rotary tool system described in claim 8.

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