JP6865955B2 - Tightening tool torque value setting system and tightening tool torque value setting device - Google Patents

Description

The present invention relates to a tightening tool torque value setting system and a tightening tool torque value setting device.

Conventionally, a torque wrench has been known as a tightening tool capable of managing the tightening torque by measuring the tightening torque when tightening a tightening member such as a bolt or a nut to a tightening location. Generally, there are two types of torque wrenches: a single-purpose torque wrench that cannot change the 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 a mechanical preset type torque wrench, when tightening a tightening member, when the tightening torque reaches a set value, the compressive force from the spring acts in the direction in which the toggle rotates around the connection part. .. As the toggle rotates around the connection portion, the toggle slides with respect to the head portion. With a torque wrench, when the toggle slides against the head and comes into contact with other parts such as the case, the torque wrench generates sound and vibration. The operator can confirm that the tightening torque value of the tightening member is equal to or higher than the set value by the sound or vibration generated from the torque wrench.

In the tightening torque management technique for tightening points using a torque wrench, a technique for sending a specified value of tightening torque for a specified tightening point from a computer to a torque wrench is disclosed (for example, Patent Document 1). reference). In this technique, based on the specified value sent to the torque wrench, the operator adjusts the tightening torque of the torque wrench so as to be within the specified value, and then tightens the tightening member.

Japanese Unexamined Patent Publication No. 2013-151043

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

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

An object of the present invention is to maintain the measurement accuracy of a mechanical preset type torque wrench.

The present invention is a tightening tool capable of measuring that the tightening torque when tightening the tightening member is a predetermined tightening torque value, and a torque value setting for setting the tightening torque value in the tightening tool. A torque value setting system including a device, 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 tightens the torque value setting unit. It is equipped with an origin setting unit that sets the torque value at the origin position.

Further, in the present invention, the origin setting unit may include a connection unit that connects to the torque value setting unit, a drive unit that drives the connection unit, and a control unit that controls the drive unit.

Further, in the present invention, the origin setting unit is a motor that can set the tightening torque value by a rotation operation, the drive unit is a motor that rotates the torque value setting unit, and the connection unit is a torque value setting unit. It may be an engaging portion that engages with the provided engaged portion.

Further, in the present invention, the tightening tool may include a lock portion that locks the torque value setting portion, and the torque value setting device may include a lock operation portion that operates the lock portion.

According to the present invention, the measurement accuracy of the mechanical preset type torque wrench can be maintained.

It is a schematic diagram of the torque value setting system which shows the embodiment which concerns on this invention. It is a partial cross-sectional view which shows an example of the torque wrench which sets the torque value 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 device 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 device in the torque value setting system shown in FIG. It is a flowchart which shows an example of the torque value setting method executed by the torque value setting system.

Hereinafter, embodiments of the torque value setting system for the tightening tool and the torque value setting device according to the present invention will be described with reference to the drawings. In the following description, the torque value setting device will describe an example of setting a torque value in a torque wrench which is an example of a tightening tool provided with a torque value setting unit.

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

[Structure of torque value setting system of torque wrench]
The 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 that tightens tightening members such as bolts and nuts to predetermined tightening points. 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 in a tightening tool such as a torque wrench 10.

[Torque wrench configuration]
FIG. 2 is a partial cross-sectional view showing an example of a torque wrench 10 in which a 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 type torque wrench. The torque wrench 10 includes a case 11, a head portion 12, a head pin 13, a toggle 14, a connecting portion 15, a holding portion 16, a spring 17, a torque value setting unit 18, and a set position detecting unit 19. Be prepared.

The case 11 is a substantially tubular 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 at the other end for gripping by an operator.

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

The ratchet head 12a is exposed from the case 11. A socket wrench (for tightening bolts or nuts) (not shown) that engages with the tightening member can be detachably attached to the ratchet head 12a. The arm portion 12b is housed inside the case 11. The arm portion 12b 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-shaped member. One end of the toggle 14 is connected to the link 12c of the head portion 12, and the other end is connected to the holding portion 16 via the connecting portion 15. The toggle 14 is pivotally supported inside the case 11 by a link 12c so as to be swingable.

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

The spring 17 is provided at a position closer to the grip portion 11b 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. For the spring 17, for example, a coil spring can be used.

The torque value setting unit 18 is provided, for example, at the tip of the grip portion 11b of the case 11. The torque value setting unit 18 includes a setting bolt 18a, a stopper 18b, a head 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 penetrates the hole provided in the stopper 18b, and only the head 18c is exposed to the outside of the stopper 18b. The shaft body of the setting bolt 18a is housed inside the case 11. An engaged portion such as a gear or a hexagonal hole is formed on the head 18c, and the setting bolt 18a is rotated by engaging with an engaging portion such as a gear or a hexagon wrench provided in the torque value setting device 20. Can be moved.

The setting bolt 18a is threaded with a male screw at least in part. The setting bolt 18a is screwed into a female screw provided on the spring support portion 18e. The stopper 18b regulates the amount of movement of the setting bolt 18a when the head 18c comes into contact with the stopper 18b.

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

Returning to FIG. 2, the lock portion 18d is provided at the upper end (end portion closer to the head portion 12) of the grip portion 11b of the case 11. The lock portion 18d prevents the tightening torque value of the torque value setting portion 18 from being changed 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 the position relative to the case 11 can be changed along the longitudinal direction of the torque wrench 10.

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

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

In the torque wrench 10, when the tightening torque reaches the set value set by the torque value setting unit 18 when tightening the tightening member, the compressive force from the spring 17 rotates the toggle 14 around the link 12c. Work in the direction. As the toggle 14 rotates about the link 12c, the toggle 14 slides with respect to the head portion 12. In 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, sound and vibration are generated from the torque wrench 10.

In the torque wrench 10, the operator can be made to 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.

[Torque value setting device configuration]
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 with the torque wrench 10 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 view showing an example of the connection portion 21 of the torque value setting device 20. Further, FIG. 5 is a schematic view showing another example of the connection portion 21 of the torque value setting device 20 shown in FIG.

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

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 the control by the control unit 23.

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 sets the tightening torque to an arbitrary set value, such as the origin position of the tightening torque value (arbitrary initial value or the 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 based on the position information of the setting bolt 18a and the head 18c transmitted from the setting position detection unit 19 of the torque wrench 10 to reduce the tightening torque of the torque wrench 10. Set to the set value.

The communication unit (communication module) 24 communicates information on the tightening torque value corresponding to the tightening location of the tightening member with the information processing device 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 18a and the head 18c 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. Further, the type of communication format between the communication unit 24 and the information processing device 30 is not limited, and for example, Bluetooth (registered trademark), infrared communication, USB (Universal Serial Bus), WAN (Wide Area Network), LAN (Local Area Network). ) Etc. can be used.

In addition 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, the torque value setting device 20 sets the tightening torque value in the control unit 23 by, for example, an input unit (not shown). You may be asked to enter the set value.

When the torque wrench 10 includes a 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 18d of the torque wrench 10 set in the torque value setting device 20 to switch whether or not the torque value setting operation can be accepted by the torque value setting unit 18.

Further, the torque value setting device 20 may include a setting position detection unit 19 provided on the torque wrench 10 in the vicinity of the drive unit 22. When the setting position detection unit 19 is provided in the torque value setting device 20, it is, for example, a camera, and detects the position of the setting bolt 18a 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 with reference to 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 torque wrench 10 is set in the accommodating portion 25a of the torque value setting device 20 by the operator, the control unit 23 determines the model of the torque wrench 10 for which the tightening torque value is set by the torque value setting device 20 (S101). ).

By determining the model, the control unit 23 sets a range of tightening torques (for example, 20 to 100 Nm, 40 to 200 Nm) that can be set by the torque wrench 10 that differs 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 tightening torque may be input from an input unit (not shown) provided in the torque value setting device 20.

The control unit (control board) 23 determines the drive amount of the drive unit 22 required to set the tightening torque value in the torque value setting unit 18 based on the information in the tightening torque value range determined in S102. The calculation step to be calculated is executed (S104).

After executing the calculation process, the torque value setting device 20 is input with the operation of 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 locked state of the lock portion 18d of the setting bolt 18a of the torque value setting unit 18 of the torque wrench 10 (S106).

After releasing the locked state, the control unit 23 performs a process of adjusting the set value to the origin position before setting the set value (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 the tightening torque value in the torque value setting unit 18 as the 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 the position corresponding to the tightening torque value.

After the torque value setting 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).

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 operates the torque value setting unit 18 of the torque wrench 10 by the connection unit 21 to set the tightening torque value set in the torque value setting unit 18 to be arbitrary including the origin position. Can be set to position. That is, according to the torque value setting system 1, an operator or the like can set a predetermined specified torque value without operating the torque value setting unit 18.

Therefore, 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, and the state of the torque value setting unit 18 can be reliably returned to the origin position.

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

It should be noted that the above description is intended to be merely an example, not a limitation. Therefore, it will be apparent to those skilled in the art that changes can be made to the above-mentioned actual form without departing from the scope of the attached claims.

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

Further, in the present embodiment, as shown in FIGS. 4 and 5, a gear or a hexagonal hole is shown as the shape of the engaged portion, and a gear or a hexagon wrench is shown as the shape of the engaging portion, respectively. The shape of the engaged portion and the engaging portion according to the above is not limited to this. The shape of the engaged portion and the engaging portion may be, for example, a Phillips screwdriver and a Phillips screwdriver.

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 Storage unit 26 Lock operation unit 30 Information processing device

Claims (4)

A tightening tool that can measure that the tightening torque when tightening the tightening member is a predetermined tightening torque value, and
A torque value setting device that sets the tightening torque value in the tightening tool, and
It is a torque value setting system equipped with
The tightening tool
Torque value setting unit that can set the tightening torque value to any value,
With
The torque value setting device is
Origin setting unit that sets the tightening torque value of the torque value setting unit at the origin position,
With
The origin setting unit is
A connection unit connected to the torque value setting unit and
The drive unit that drives the connection unit and
A control unit that controls the drive unit and
To prepare
Torque value setting system for tightening tools. The origin setting unit can set the tightening torque value by a rotation 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 for a tightening tool according to claim 1. The tightening tool includes a lock portion that locks the torque value setting portion.
The torque value setting device includes a lock operation unit that operates the lock unit.
The torque value setting system for a tightening tool according to claim 1 or 2. 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 can be set to an arbitrary value. It is a torque value setting device that sets the tightening torque value.
Origin setting unit that sets the tightening torque value of the torque value setting unit at the origin position,
With
The origin setting unit is
A connection unit connected to the torque value setting unit and
The drive unit that drives the connection unit and
A control unit that controls the drive unit and
To prepare
Torque value setting device for tightening tools.

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