WO2018123816A1

WO2018123816A1 - Torque value setting system, torque value setting device, and torque value setting method

Info

Publication number: WO2018123816A1
Application number: PCT/JP2017/045968
Authority: WO
Inventors: 佳之山口; 喜晴松本
Original assignee: 京都機械工具株式会社
Priority date: 2016-12-26
Filing date: 2017-12-21
Publication date: 2018-07-05
Also published as: CN110099771B; TW201825244A; TWI737876B; CN110099771A

Abstract

This torque value setting system is provided with: a fastening tool capable of measuring whether a fastening torque during the fastening of a fastening member is a predetermined fastening torque value; and a torque value setting device for setting a fastening torque value on the fastening tool. The fastening tool is provided with a torque value setting unit capable of setting the fastening torque value to an arbitrary value. The torque value setting device is provided with: a connection unit connected to the torque value setting unit; a drive unit for driving the connection unit; and a control unit that controls the drive unit to set the fastening torque value on the torque value setting unit.

Description

Torque value setting system, torque value setting device, and torque value setting method

The present invention relates to a torque value setting system, a torque value setting device, and a torque value setting method.

Conventionally, a torque wrench is known as a tightening tool capable of managing the tightening torque by measuring the tightening torque when a tightening member such as a bolt or a nut is tightened at a tightening location. In general, there are two types of torque wrench: a single-function type torque wrench that cannot change the numerical value of the tightening torque to be measured, and a preset type torque wrench that can change the value of the tightening torque that can be measured by an operator's operation.

In the mechanical preset torque wrench, when the tightening member is tightened, when the tightening torque reaches a set value, the compression force from the spring acts in the direction in which the toggle rotates around the connecting portion. . As the toggle rotates about the connecting portion, the toggle slides relative to the head portion. In the torque wrench, when the toggle slides with respect to the head portion and comes into contact with another part such as a case, sound and vibration are generated from the torque wrench. The operator can confirm that the tightening torque value of the tightening member is greater than or equal to the set value by sound or vibration generated from the torque wrench.

In the case of a preset torque wrench, when performing tightening torque management, it is necessary to appropriately set the tightening torque setting value for each tightening location.

In addition, in a tightening torque management technique for a tightening location using a torque wrench, a technology is disclosed in which a set value of a tightening torque at a specified tightening location is sent from a computer to a torque wrench (for example, Patent Document 1). reference). In this technique, based on the set value sent to the torque wrench, the operator adjusts the tightening torque of the torque wrench to be within the range of the set value, and then tightens the tightening member.

JP 2013-151043 A

However, in the torque wrench of Patent Document 1, it is necessary for an operator or the like to manually set the tightening torque by operating the torque wrench.

In tightening work, it is required to set an appropriate tightening torque in the torque wrench in order to improve traceability so that it can be traced that the tightening torque of the tightening member is an appropriate value. Further, in order to improve the traceability of the tightening operation, it is also required that the set tightening torque cannot be easily changed.

Further, in order to maintain the measurement accuracy, the mechanical preset torque wrench unloads the compression force applied to the spring during storage as much as possible (for example, to the origin position of the tightening torque value setting range). Is desirable.

However, in the conventional mechanical preset torque wrench, it is necessary for an operator or the like to set the tightening torque. That is, in the conventional preset torque wrench, the operator has to set the tightening torque value at the origin position.

The present invention aims to improve the traceability of the tightening work of the tightening member. Another object of the present invention is to maintain the measurement accuracy of a mechanical preset torque wrench.

The present invention relates to a tightening tool capable of measuring that a tightening torque when tightening a tightening member is a predetermined tightening torque value, and a torque value setting for setting the tightening torque value in the tightening tool. The tightening tool includes a torque value setting unit capable of setting the tightening torque value to an arbitrary value, and the torque value setting device is connected to the torque value setting unit. A connecting unit; a driving unit that drives the connecting unit; and a control unit that controls the driving unit to set a tightening torque value in the torque value setting unit.

In the present invention, the control unit may calibrate the origin position of the torque value setting unit of the tightening tool and the origin position of the drive unit before setting the tightening torque value.

In the present invention, the torque value setting unit can set a tightening torque value by a turning operation, the drive unit is a motor that rotates the torque value setting unit, and the connection unit is a torque value setting unit. The engaging part engaged with the to-be-engaged part provided in may be sufficient.

Also, in the present invention, the torque value setting device may include an input unit that inputs a tightening torque value to the control unit.

In the present invention, the torque value setting device may include a communication unit that communicates the tightening torque value with the information processing device and sets the tightening torque value in the control unit.

In the present invention, the torque value setting device includes a detection unit that detects a connection status between the torque value setting unit and the connection unit, and the control unit stores a connection status between the torque value setting unit and the connection unit. May be.

Further, according to the present invention, the control unit may store the connection date and time of connection between the torque value setting unit and the connection unit as the connection status.

In the present invention, the control unit may set the tightening torque value of the torque value setting unit to the origin position.

In the present invention, the control unit may be able to set the tightening torque value at the origin position by rotating the torque value setting unit.

The present invention provides a torque for setting a tightening torque value in a torque value setting portion provided in a tightening tool capable of measuring that the tightening torque when tightening a tightening member is a predetermined tightening torque value. It is a value setting device.

The present invention sets a tightening torque value for a torque value setting portion of a tightening tool capable of measuring that the tightening torque at the time of tightening the tightening member is a predetermined tightening torque value. A torque value setting method executed by a torque value setting device, wherein the torque value setting device calculates a drive amount of a drive unit for setting a tightening torque value in a torque value setting unit, and based on the drive amount Then, the driving unit is driven to execute a tightening torque setting step of setting a tightening torque value in the torque value setting unit.

In the present invention, a calibration step of calibrating the origin position of the torque value setting section and the origin position of the drive section may be executed before setting the tightening torque value.

According to the present invention, the traceability of the tightening work of the tightening member can be improved. Further, according to the present invention, the measurement accuracy of a mechanical preset torque wrench can be maintained.

It is a mimetic diagram of a torque value setting system showing an embodiment concerning the present invention. It is a fragmentary sectional view which shows an example of the torque wrench by which a torque value is set by the torque value setting system shown in FIG. It is a bottom view which shows the vicinity of the torque value setting part of the torque wrench shown in FIG. It is a schematic diagram which shows an example of the connection part of the torque value setting apparatus in the torque value setting system shown in FIG. It is a schematic diagram which shows another example of the connection part of the torque value setting apparatus in the torque value setting system shown in FIG. It is a flowchart which shows an example of the torque value setting method which a torque value setting system performs.

Embodiments of a tightening tool torque value setting system, a torque value setting device, and a tightening tool torque value setting method according to the present invention will be described below with reference to the drawings. In the following description, an example in which the torque value setting device sets a torque value in a torque wrench that is an example of a tightening tool including a torque value setting unit will be described.

FIG. 1 is a schematic diagram of a torque value setting system 1 showing an embodiment according to the present invention.

[Configuration of torque wrench torque value setting system]
A configuration of the torque value setting system 1 will be described.

As shown in FIG. 1, the torque value setting system 1 includes a torque wrench 10 and a torque value setting device 20.

The torque wrench 10 is an example of a tightening tool for tightening a tightening member such as a bolt or a nut to a predetermined tightening location. The torque wrench 10 can measure that the tightening torque when tightening the tightening member is a predetermined tightening torque (hereinafter referred to as “tightening torque value”).

The torque value setting device 20 is a device that sets a tightening torque value for a tightening tool such as the torque wrench 10.

[Configuration of torque wrench]
FIG. 2 is a partial cross-sectional view showing an example of a torque wrench 10 whose tightening torque value is set by the torque value setting system 1 shown in FIG.

The torque wrench 10 is a so-called mechanical preset torque wrench. The torque wrench 10 includes a case 11, a head part 12, a head pin 13, a toggle 14, a connection part 15, a holding part 16, a spring 17, a torque value setting part 18, and a setting position detection part 19. Prepare.

The case 11 is a substantially cylindrical member that houses the components of the torque wrench 10 such as the head portion 12 and the toggle 14 and constitutes the outer shape of the torque wrench 10. The case 11 is provided with a head portion 12 at one end. Further, the case 11 is provided with a grip portion 11b for the operator to hold at the other end.

The head unit 12 includes a ratchet head 12a, an arm unit 12b, and a link 12c. The head portion 12 is pivotally supported with respect to the case 11 by a head pin 13 provided at the boundary between the ratchet head 12a and the arm portion 12b.

The ratchet head 12a is exposed from the case 11. A socket wrench (not shown) that engages with a fastening member (for bolt or nut fastening) can be detachably attached to the ratchet head 12a. The arm portion 12b is housed inside the case 11. The arm portion 12 b can swing inside the case 11 around the head pin 13. A link 12c connected to the toggle 14 is provided at the tip of the arm portion 12b.

The toggle 14 is a substantially rectangular plate member. The toggle 14 has one end connected to the link 12 c of the head unit 12 and the other end connected to the holding unit 16 via the connection unit 15. The toggle 14 is pivotally supported inside the case 11 by a link 12c.

The holding part 16 is a substantially cylindrical member. The holding part 16 is disposed inside the case 11 so that a direction perpendicular to the axial direction (longitudinal direction) of the torque wrench 10 is a plane. The other end of the toggle 14 is slidably connected to one side of the holding part 16 via the connection part 15. The holding portion 16 has one of the springs 17 in contact with the other flat surface.

The spring 17 is provided at a position near the grip portion 11 b inside the case 11. The spring 17 is a compression spring in which the longitudinal direction of the torque wrench 10 is the compression direction. As the spring 17, for example, a coil spring can be used.

The torque value setting portion 18 is provided at the tip of the grip portion 11b of the case 11, for example. The torque value setting unit 18 includes a setting bolt 18a, a stopper 18b, a head portion 18c, a lock portion 18d, and a spring support portion 18e.

FIG. 3 is a bottom view showing the vicinity of the torque value setting unit 18 of the torque wrench 10. As shown in FIG. 3, the setting bolt 18a passes through a hole provided in the stopper 18b, and only the head 18c is exposed to the outside of the stopper 18b. The setting bolt 18 a has a shaft body housed inside the case 11. Engaged parts such as gears and hexagonal holes are formed on the head 18c. The setting bolt 18a can be rotated by engaging the head 18c with an engaging portion such as a gear or a hexagon wrench provided in the torque value setting device 20.

設定 Male screw threads are cut at least partially on the setting bolt 18a. The setting bolt 18a is screwed into a female screw provided on the spring support 18e. The stopper 18b regulates the amount of movement of the setting bolt 18a by contacting the head 18c.

The contact surface provided inside the case 11 is in contact with the spring 17 in the spring support portion 18e. The spring support portion 18 e compresses the spring 17 in the direction of the holding portion 16. The torque value setting unit 18 moves the position of the spring support 18e to which the setting bolt 18a is screwed by rotating the head 18c. For this reason, the torque value setting unit 18 can change the pressing force of the spring 17 against the holding unit 16. The torque value setting unit 18 adjusts the degree of compression of the spring 17 by rotating the setting bolt 18a, and sets a tightening torque value to a predetermined value (for example, a prescribed value determined for each tightening member at the tightening point). (Tightening torque value) can be set (see FIGS. 4 and 5).

2, the lock portion 18d is provided at the upper end of the grip portion 11b of the case 11 (the end portion near the head portion 12). The lock portion 18d prevents the torque value setting portion 18 from changing the tightening torque value even if the setting bolt 18a is rotated. The lock portion 18d is, for example, a ring-shaped member provided coaxially with the grip portion 11b, and can change a relative position with respect to the case 11 along the longitudinal direction of the torque wrench 10.

The set position detector 19 is provided at a position where the position of the set bolt 18a inside the case 11 can be detected, for example. The set position detector 19 is a sensor that detects the position of the set bolt 18a and the head 18c. The setting position detection unit 19 includes, for example, a camera that detects the positions of the setting bolt 18a and the head 18c from an image, a combination of a light emitting unit such as infrared rays, and a light receiving element (photodiode). The setting position detection unit 19 transmits information such as the detected position of the setting bolt 18a and the head 18c to the control unit 23 of the torque value setting device 20 wirelessly or by wire.

[Torque wrench operation]
The operation of the torque wrench 10 described above will be described.

In the torque wrench 10, when the tightening member is tightened, when the tightening torque reaches the set value set by the torque value setting unit 18, the toggle force 14 rotates around the link 12c by the compression force from the spring 17. Work in the direction. The toggle 14 slides with respect to the head portion 12 as the toggle 14 rotates about the link 12c. In the torque wrench 10, sound and vibration are generated from the torque wrench 10 when the toggle 14 slides with respect to the head portion 12 and comes into contact with other parts such as the case 11.

In the torque wrench 10, the operator can recognize that the tightening torque has reached the set value by the sound and vibration generated by the toggle 14 sliding with respect to the head portion 12.

[Configuration of torque value setting device]
Next, the configuration of the torque value setting device 20 of the torque value setting system 1 will be described.

As shown in FIG. 1, the torque value setting device 20 includes a connection unit 21, a drive unit 22, a control unit 23, a communication unit 24, and a housing 25.

The connection unit 21 is provided at a position where the torque value setting unit 18 can be operated in a state where the torque wrench 10 is attached to the torque value setting device 20. The connection unit 21 is connected to the torque value setting unit 18 of the torque wrench 10 attached to the torque value setting device 20.

FIG. 4 is a schematic diagram illustrating an example of the connection portion 21 of the torque value setting device 20. FIG. 5 is a schematic diagram showing another example of the connecting portion 21 of the torque value setting device 20 shown in FIG.

As shown in FIGS. 4 and 5, specifically, the connection portion 21 is provided in, for example, the housing portion 25 a of the housing 25. The accommodating portion 25 a can accommodate the grip portion 11 b of the torque wrench 10. The connecting portion 21 is an engaging portion such as a gear shown in FIG. 4 or a hexagon wrench shown in FIG. 5 that can be engaged with an engaged portion such as a gear of the head 18c of the torque value setting portion 18 or a hexagonal hole. is there. Since the engaging portion is engageable with the engaged portion of the head 18 c of the torque wrench 10, the connecting portion 21 can be connected to the torque value setting portion 18.

The drive unit 22 is an actuator capable of controlling the drive amount, such as a servo motor or a solenoid. The drive unit 22 operates the connection unit 21 with a drive amount based on control by the control unit 23.

The control unit (control board) 23 usually executes a torque value setting method by an electronic device mounted on the control board to realize the function of the torque value setting device. For example, the control unit 23 sets the tightening torque to an arbitrary set value, such as an origin position of the tightening torque value (an arbitrary initial value or a limit position of the setting range of the torque value setting unit 18). That is, the control unit 23 functions as an origin setting unit together with the connection unit 21 and the drive unit 22. The control unit 23 operates the torque value setting unit 18 via the connection unit 21 by controlling the drive amount of the drive unit 22. The control unit 23 operates the torque value setting unit 18 based on the position information of the setting bolt 18 a and the head 18 c transmitted from the setting position detection unit 19 of the torque wrench 10, thereby adjusting the tightening torque of the torque wrench 10. Set to the set value.

The communication unit (communication module) 24 communicates tightening torque value information corresponding to the tightening position of the tightening member with the information processing apparatus 30 such as a smartphone, a tablet terminal, or a personal computer. The communication unit 24 receives the transmitted position information of the setting bolt 18 a and the head 18 c from the setting position detection unit 19 of the torque wrench 10. The communication path by the communication unit 24 may be either wireless communication or wired communication. The type of communication format between the communication unit 24 and the information processing device 30 is not limited. For example, Bluetooth (registered trademark), infrared communication, USB (Universal Serial Bus), WAN (Wide Network Network), LAN (Local Network Network) ) Etc. can be used.

The torque value setting device 20 is not limited to setting the tightening torque value in the control unit 23 by communication between the communication unit 24 and the information processing device 30 as described above, and for example, an input unit such as a touch panel of the information processing device 30 The setting value may be input to the control unit 23 via the communication unit 24.

Further, when the torque wrench 10 includes the lock unit 18d that locks the torque value setting unit 18, the torque value setting device 20 may include a lock operation unit that releases the lock unit 18d. The lock operation unit operates the lock unit 18 d of the torque wrench 10 set in the torque value setting device 20 to switch whether to accept the torque value setting operation to the torque value setting unit 18.

Further, the torque value setting device 20 may include a setting position detection unit 19 provided in the torque wrench 10 in the vicinity of the driving unit 22. When provided in the torque value setting device 20, the setting position detection unit 19 is a camera, for example, and detects the position of the setting bolt 18 a or the like from the captured image.

[Operation of torque value setting device]
Next, a torque value setting method of the torque wrench 10 realized by the operation of the torque value setting device 20 in the torque value setting system 1 will be described using a flowchart.

FIG. 6 is a flowchart showing an example of a torque value setting method executed by the torque value setting system 1.

When the operator sets the torque wrench 10 in the accommodating portion 25a of the torque value setting device 20, the control unit 23 confirms that the torque wrench 10 has been set in the accommodating portion 25a by a detection unit such as a limit switch or an optical sensor. To detect. That is, the detection unit detects that the torque value setting unit 18 and the connection unit 21 of the torque value setting device 20 are connected as a connection state between the torque value setting unit 18 and the connection unit 21 of the torque value setting device 20. To do. The control unit 23 stores, in the storage unit, a record of the connection status in which it is detected that the torque wrench 10 is set in the housing unit 25a together with information such as date and time. The control unit 23 determines the model of the set torque wrench 10 in order to set the tightening torque value by the torque value setting device 20 (S101).

By determining the model, the control unit 23 sets a tightening torque range (for example, 20 to 100 N · m, 40 to 200 N · m, etc.) that can be set by the torque wrench 10 that is different for each model (S102).

When the tightening torque value is transmitted from the information processing device 30 to the communication unit 24 of the torque value setting device 20, the tightening torque value is input to the memory unit of the control unit 23 (S103). The input of the tightening torque may be received from an input unit provided in the torque value setting device 20.

The control unit (control board) 23 sets the drive amount of the drive unit 22 necessary for setting the tightening torque value in the torque value setting unit 18 based on the information of the tightening torque value range determined in S102. A calculation step for calculation is executed (S104).

After execution of the calculation process, the torque value setting device 20 receives an operation for starting the setting of the tightening torque value to the torque value setting unit 18 of the torque wrench 10 (S105). The control unit 23 performs a process of releasing the lock state of the lock unit 18d of the setting bolt 18a of the torque value setting unit 18 of the torque wrench 10 (S106).

After releasing the lock state, the control unit 23 adjusts the set value to an arbitrary initial value or the limit position of the set range of the torque value setting unit 18 (hereinafter referred to as “origin position”) before setting the set value. Processing is performed (S107). The origin position adjustment process is a calibration process for accurately setting the set value of the torque wrench 10.

After adjusting the set value to the origin position, the control unit 23 sets a tightening torque value in the torque value setting unit 18 as a tightening torque setting step (S108). In order to set the tightening torque value, the control unit 23 drives the drive unit 22 with the previously calculated drive amount, and drives the torque value setting unit 18 from the origin position to a position corresponding to the tightening torque value.

After the setting of the torque value by the drive unit 22 is completed, the control unit 23 locks the lock unit 18d of the setting bolt 18a of the torque value setting unit 18 of the torque wrench 10 (S109). If the operator removes the torque wrench 10 from the accommodating portion 25a after locking the lock portion 18d, the control unit 23 detects that the torque wrench 10 has been removed from the accommodating portion 25a by the detection device (not shown). That is, the control unit 23 detects the release of the connection between the torque value setting unit 18 and the connection unit 21. The control unit 23 stores information on the connection status such as the date and time when the release of the connection between the torque value setting unit 18 and the connection unit 21 is detected in the storage unit.

As described above, according to the torque value setting system 1 of the torque wrench 10, the tightening torque value of the torque wrench 10 can be set by the torque value setting device 20. Here, the torque value setting system 1 can set the value of the tightening torque by operating the torque value setting unit 18 of the torque wrench 10 with the connection unit 21. That is, according to the torque value setting system 1, a predetermined tightening torque value can be set without an operator or the like operating the torque value setting unit 18.

Further, according to the torque value setting system 1, it is not necessary for an operator or the like to operate the torque value setting unit 18, so that the tightening member can be securely tightened with a specified tightening torque value. Further, according to the torque value setting system 1, the control unit 23 can store information such as the date and time when it is detected that the torque wrench 10 has been taken out from the storage unit 25 a in the storage unit.

Therefore, according to the torque value setting system 1, it is possible to appropriately manage the tightening torque of the tightening member and improve the traceability of the tightening torque management.

In addition, the torque value setting system 1 operates the torque value setting unit 18 of the torque wrench 10 with the connection unit 21 to set the tightening torque value set in the torque value setting unit 18 to any position including the origin position. Can be set to

Therefore, according to the torque value setting system 1, the measurement accuracy of the mechanical preset torque wrench can be maintained.

Note that the above description is intended to be illustrative only and not limiting. Accordingly, it will be apparent to one skilled in the art that modifications may be made to the above-described form without departing from the scope of the appended claims.

For example, although the torque wrench 10 is shown as a tightening tool in the present embodiment, the tightening tool according to the present invention is not limited to this, and a so-called tightening torque is measured when a screw is tightened as a tightening member. It can also be applied to torque drivers.

Further, in the present embodiment, as shown in FIGS. 4 and 5, the gear and the hexagon socket are shown as the shape of the engaged portion, and the gear and the hexagon wrench are shown as the shape of the engaging portion. The shapes of the engaged part and the engaging part are not limited to this. The shapes of the engaged portion and the engaging portion may be, for example, shapes such as a Phillips screw and a Phillips screwdriver.

The present invention can be used for management of tightening torque in various industries that use a tightening member such as maintenance of transportation facilities such as aircraft, railways, and automobiles.

DESCRIPTION OF SYMBOLS 1 Torque value setting system 10 Torque wrench 11 Case 11b Grip part 12 Head part

12a Ratchet head

12b Arm part 12c Link 13 Head pin 14 Toggle 15 Connection part 16 Holding part 17 Spring 18 Torque value setting part

18a Setting bolt 18b Stopper 18c Head

18d Lock unit 19 Setting position detection unit 20 Torque value setting device 21 Connection unit 22 Drive unit 23 Control unit 24 Communication unit 25 Housing 25a Housing unit 30 Information processing device

Claims

A tightening tool capable of measuring that the tightening torque when tightening the tightening member is a predetermined tightening torque value;
A torque value setting device for setting the tightening torque value in the tightening tool;
A torque value setting system comprising:
The tightening tool is
A torque value setting unit capable of setting the tightening torque value to an arbitrary value;
With
The torque value setting device includes:
A connecting portion connected to the torque value setting portion;
A drive unit for driving the connection unit;
A control unit that controls the drive unit to set the tightening torque value in the torque value setting unit;
Comprising
Torque value setting system.
The controller calibrates the origin position of the torque value setting section and the origin position of the drive section of the tightening tool before setting the tightening torque value.
The torque value setting system according to claim 1.
The torque value setting unit can set the tightening torque value by a turning operation,
The drive unit is a motor that rotates the torque value setting unit,
The connecting portion is an engaging portion that engages with an engaged portion provided in the torque value setting portion.
The torque value setting system according to claim 1.
The torque value setting device includes an input unit that inputs the tightening torque value to the control unit,
The torque value setting system according to claim 1.
The torque value setting device includes a communication unit that communicates the tightening torque value with an information processing device and sets the tightening torque value in the control unit.
The torque value setting system according to claim 1.
The torque value setting device includes a detection unit that detects a connection state between the torque value setting unit and the connection unit,
The control unit stores a connection state between the torque value setting unit and the connection unit.
The torque value setting system according to claim 1.
The control unit stores the date and time of connection and release of connection between the torque value setting unit and the connection unit as the connection status.
The torque value setting system according to claim 6.
The control unit sets the tightening torque value of the torque value setting unit to an origin position;
The torque value setting system according to claim 1.
The control unit can set the tightening torque value at the origin position by rotating the torque value setting unit.
The torque value setting system according to claim 8.
The torque value setting unit capable of setting the tightening torque value of the tightening tool capable of measuring that the tightening torque when tightening the tightening member is a predetermined tightening torque value to the arbitrary value. A torque value setting device for setting a tightening torque value,
A connecting portion connected to the torque value setting portion;
A drive unit for driving the connection unit;
A control unit that controls the drive unit to set the tightening torque value in the torque value setting unit;
Comprising
Torque value setting device.
Torque value setting for setting the tightening torque value for the torque value setting part of the tightening tool capable of measuring that the tightening torque when tightening the tightening member is a predetermined tightening torque value A torque value setting method executed by the device,
The torque value setting device includes:
A calculation step of calculating a driving amount of a driving unit for setting the tightening torque value in the torque value setting unit;
A tightening torque setting step of driving the drive unit based on the drive amount and setting the tightening torque value in the torque value setting unit;
Execute torque value setting method.
The torque value setting device includes:
Performing a calibration step of calibrating the origin position of the torque value setting section and the origin position of the drive section before setting the tightening torque value;
The torque value setting method according to claim 11.