JP7128701B2 - Torque Wrench - Google Patents

Description

The present invention relates to a manual torque wrench for tightening tightening members such as bolts and nuts.

2. Description of the Related Art Conventionally, manual torque wrenches that can be applied to fastening members of different sizes and shapes by exchanging sockets have been used at work sites where various types of assembly are performed. In such a torque wrench, when the socket is replaced, it is necessary to manually set the torque value according to the type of tightening member. For example, in Patent Document 1, the tail end of an adjusting screw hidden in the protective portion of the handle of a torque wrench is adjusted to an appropriate set torque value by turning using a tool. A preset type torque wrench is disclosed that solves the problem that the set torque value is disturbed due to contact with other objects.

Japanese Utility Model Publication No. 7-4126

However, with the torque wrench disclosed in Patent Document 1, in which the operator adjusts the torque value by himself/herself, tightening can be caused by human error, such as setting the torque value incorrectly or replacing the socket while forgetting to change the setting. There is a risk that the reliability of the attachment work will be lowered.

The present invention has been made in view of these points, and its object is to enable automatic setting to a target torque value corresponding to the type of mounted socket, thereby preventing human error.

In order to achieve the above object, the present invention provides a detection portion of a wrench body that detects a signal from a detected portion of the socket when the socket is mounted at a specified position, thereby making it possible to determine the type of socket. A pre-stored target torque value is controlled according to the type.

Specifically, the first invention is
A torque wrench that includes a plurality of types of sockets to be engaged with a tightening member and a wrench body having a mounting portion that is detachably attached to each socket, and manually tightens the tightening member at a target torque value. In Luquench,
a positioning mechanism for positioning the socket so that it is mounted on the mounting portion at a prescribed position;
a detected part provided individually so as to be different for each of the plurality of types of sockets;
a detection unit provided in the wrench body for detecting the detected portion of the socket when the socket is mounted in the mounting portion at a specified position by the positioning mechanism;
a storage unit that stores a plurality of torque values corresponding to the plurality of types of sockets;
a control unit that determines the type of socket according to the detected part detected by the detection unit, and sets the torque value stored in the storage unit corresponding to the type of socket as the target torque value. Characterized by

According to the above configuration, when the socket is attached to the attachment portion of the wrench main body at the prescribed position, the detecting portion of the wrench main body detects the detection target portion provided individually so as to be different for each socket. A plurality of torque values corresponding to a plurality of types of sockets are stored in advance in the storage unit of the wrench body, and the control unit discriminates the type of socket based on the signal of the detected part detected by the detection unit, By referring to the torque value corresponding to the socket from the storage unit, it is possible to set the target torque value suitable for the tightening member. There is no risk of human error.

A second invention is based on the first invention,
The detected part of the socket is at least one magnet,
The detection unit is a magnetic sensor that detects a magnetic signal emitted by the magnet when the socket is attached to the attachment unit at a specified position ,
The detecting portion is provided around the mounting portion on the surface on which the mounting portion is provided, and the detected portion is provided on a surface facing the surface from which the mounting portion protrudes,
The control unit is configured to determine the type of socket based on at least one of the number, arrangement and poles of magnets detected by the magnetic sensor.

According to the above configuration, by using the magnet as the detection part of the socket and the magnetic sensor as the detection part of the wrench body, it is possible to distinguish many types of fastening members by combining the number, arrangement and poles of the magnets. is. Moreover, since it is a non-contact sensor, it is excellent in durability.

A third invention is, in the first invention,
The detected portion of the socket is at least one convex portion,
The detection unit is a press switch that is turned on by being pressed by the projection when the socket is attached to the attachment unit at a specified position ,
The detecting section is provided around the mounting section on the surface on which the mounting section is provided, and the detected section is provided on a surface facing the surface on which the mounting section is provided,
The control unit is characterized in that it is configured to determine the type of socket based on at least one of the number and arrangement of push switches in the ON state.

According to the above configuration, the convex portion arranged in the socket presses the push switch to turn it on, and the torque value is set based on at least one of the number and arrangement of the push switches in the on state. types of fastening members can be distinguished.

A fourth invention is, in the first invention,
The detected part of the socket is a convex part,
The detection unit is a pressure-sensitive sensor that detects a state of pressure from the projection when the socket is attached to the attachment unit at a specified position ,
The detecting section is provided around the mounting section on the surface on which the mounting section is provided, and the detected section is provided on a surface facing the surface on which the mounting section is provided,
The control section is characterized in that it is configured to determine the type of socket based on the pressurized state detected by the pressure sensor.

According to the above configuration, the pressure sensor detects the level of pressure exerted by the convex portion of the socket, and the torque value is set based on the pressurized state, so many types of tightening members can be discriminated. .

A fifth invention is the first invention,
The part to be detected of the socket is a conductive part,
The detection unit is a resistance value sensor that detects the resistance value of the conductive unit when the socket is attached to the attachment unit at a specified position,
The control section is configured to determine the type of socket based on the resistance value detected by the resistance value sensor.

According to the above configuration, the conductive part is used as the part to be detected in the socket, the resistance value sensor detects the level of the resistance value, and the torque value is set based on the resistance value. It is possible to identify the member.

A sixth invention is, in any one of the first to fifth inventions,
Each socket is provided with a fitting portion into which the mounting portion of the wrench body is detachably fitted,
The positioning mechanism is characterized by having an engaging recess provided in the mounting portion of the wrench body, and an engaging protrusion provided in the fitting portion of the socket and engaged with the engaging recess.

According to the above configuration, since the wrench main body side of the positioning mechanism has the engaging concave portion, it is possible to use not only a special socket provided with the engaging convex portion but also a general-purpose socket having no engaging convex portion. It is possible.

A seventh invention is any one of the first to fifth inventions,
Each socket is provided with a fitting portion into which the mounting portion of the wrench body is detachably fitted,
The positioning mechanism is characterized by having an engagement projection provided on the mounting portion of the wrench body and an engagement recess provided on the fitting portion of the socket and engaged with the engagement projection. .

According to the above configuration, the positioning mechanism has an engagement protrusion on the wrench main body side, thereby preventing an incompatible general-purpose socket from being erroneously attached to the wrench main body. It is possible to prevent human error that may occur in

As described above, according to the present invention, when the socket is attached to the attachment portion at a specified position, the detection portion of the socket is detected by the detection portion of the wrench body, and based on the signal of the detection portion detected by the detection portion. Then, the control unit discriminates the type of the socket and refers to the corresponding torque value from the storage unit in which a plurality of torque values corresponding to a plurality of types of sockets are stored in advance, thereby obtaining a target torque value suitable for the tightening member. is set, there is no need for the operator to set the torque value by himself each time the socket is changed, and human error in setting the torque value can be prevented.

Fig. 4 is a perspective view showing a main part of a wrench body and a socket according to Embodiment 1; Fig. 2 is a side view of a wrench body and a socket according to Embodiment 1; 4 is a bottom view of the wrench body and socket according to Embodiment 1. FIG. 1 is a schematic cross-sectional view showing a main part of a torque wrench according to Embodiment 1. FIG. 4 equivalent view of a torque wrench according to Embodiment 2. FIG. 4 equivalent view of a torque wrench according to Embodiment 3. FIG. 4 equivalent view of a torque wrench according to Embodiment 4. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its applicability or its uses.

(Embodiment 1)
FIG. 1 shows a torque wrench T1 according to Embodiment 1 of the present invention. The torque wrench T1 includes a plurality of types of sockets 101a, 101b, 101c, . 101 can be exchanged and tightened manually.

(Configuration of wrench body)
As shown in FIGS. 1 to 3, the wrench main body 1 has a trunk portion 12 extending in the shape of a square tube, and at one end of the trunk portion 12, a mounting portion 15 to be mounted to a plurality of types of sockets 101 is provided. A portion 11 is provided, and the other end portion of the body portion 12 is provided with an operation portion 13 that can be gripped by an operator.

The head 11 is provided with a ratchet mechanism (not shown). A prism-shaped mounting portion 15 connected to a ratchet mechanism is provided at substantially the center of the head portion 11, and as shown in FIG. , the socket 101 is used to engage the wrench body 1 and the tightening member. Note that FIG. 4 shows a state in which the socket 101 is being attached to the attachment portion 15 . An engaging concave portion 15 a is formed on the outer peripheral surface of the mounting portion 15 from the edge portion on the distal end side toward the proximal end side. The engaging concave portion 15a may be of any form as long as it is provided so as to face the engaging convex portion 115a of the socket 101 to be mounted. The portion 115a serves as a positioning mechanism, and positions the socket 101 so that it is attached to the attachment portion 15 at a specified position. The shape of the mounting portion 15 is not limited as long as it corresponds to the fitting portion 115 of the socket 101, but it is desirable to have a shape that allows mounting of a general-purpose socket.

Further, the head 11 incorporates a detecting portion 14 for detecting a detected portion 114 of the socket 101, which will be described later, when the socket 101 is attached to the attaching portion 15 at a specified position by the positioning mechanisms 15a and 115a. . As the detector 14, for example, a pickup coil for detecting a magnetic signal, or a magnetic sensor such as a Hall element or an MR element can be used. In the first embodiment, a pickup coil is used. Also, it is desirable that the pickup coil 14 can distinguish between the S pole and the N pole of the magnet. As shown in FIGS. 3 and 4, a plurality of pickup coils 14, which are detectors, are embedded in the head 11 close to the surface of the mounting portion 15 so as to surround the mounting portion 15. As shown in FIG. The number and positions of the pickup coils 14 are not limited. It may be provided at any position on the head 11 including. The pickup coil 14 is connected to the control section 17 via the wiring 18 so as to transmit the detected signal of the detected section 114 to the control section 17 . Note that the electrical connection form of the detection unit 14, the storage unit 16, the control unit 17, and the wiring 18 is not limited to that shown in FIG.

The trunk portion 12 has an urging member (not shown) such as a coil spring inside a square cylinder, and the torque is set by adjusting the degree of compression of the urging member. A wire 18 is inserted through the body portion 12 to electrically connect a detection portion 14 built in the head portion 11 and a control portion 17 and a storage portion 16 built in the operation portion 13. there is

The operation part 13 has a substantially cylindrical shape with a diameter larger than that of the body part 12, and as shown in FIG. As shown in FIG. 3, a storage unit 16 storing a plurality of torque values and a torque value control unit 17 are provided therein. The operation unit 13 may be provided with torque setting means for manually setting the torque. For example, a rotatable bolt, dial, or the like may be provided at the end of the operation portion 13 so that the degree of compression of the biasing member inside the wrench body 1 can be manually adjusted.

The display unit 19 displays, for example, the torque value applied by the control unit 17, information on tightening members such as bolts and nuts, set target torque values, actual torque values during tightening work, etc., to the operator. is configured so that it can be visually confirmed. A setting button 21 provided near the display unit 19 can be used to set the torque value.

The storage unit 16 preliminarily stores a plurality of torque values corresponding to the detected portion 114 of the socket 101 , which will be described later, and is electrically connected to the control unit 17 . The method for storing the torque value in the storage unit 16 is not limited, but for example, the optimum torque value corresponding to the socket 101 is stored by pressing the setting button 21 with the socket 101 attached, or the wrench body 1 is externally stored. A connectable wiring hole (not shown) is provided, and data can be stored by connecting to a computer or the like and transferring data.

The control unit 17 determines the type of the socket 101 according to the detected part 114 detected by the detection unit 14, and controls the torque value stored in the storage unit 16 corresponding to the type of the socket 101 as the target torque value. is performed. In the first embodiment, the detection unit is the magnetic sensor 14, the detected unit is the magnet 114, and the control unit 17 detects the socket based on at least one of the number, arrangement, and poles of the magnets 114 detected by the magnetic sensor 14. 101 types can be discriminated.

In addition, the wrench body 1 may be provided with a torque sensor for detecting torque during tightening work. When the target torque value is reached by the torque sensor and the control unit 17, the operator is notified of the tightening torque. It is also possible to provide a function to notify the suitability. Means for notifying the operator of the propriety of the torque include, for example, lighting the display section 19 or generating sound or vibration from the wrench main body 1 .

Furthermore, the wrench main body 1 may have a form output function for managing work records. For example, information can be transmitted to a remote external terminal (for example, a PC, a smartphone, a tablet terminal, etc.) by communication means such as Bluetooth (registered trademark) or infrared communication, or the work history can be recorded on the wrench main body 1. Alternatively, the wrench main body 1 may be connected to an external terminal at the end of work so that information can be transmitted, or the wrench main body 1 may be provided with a recording medium such as a USB memory or an SD card to record the work history.

(Socket configuration)
A plurality of types of sockets can be used, such as the sockets 101a, 101b, and 101c shown in FIG. Each socket 101 has a cylindrical one end formed with a fitting portion 115 to be attached to the wrench body 1, and the other end can be engaged with a different size and type of tightening member for each socket 101. Engagement holes 111a, 111b, and 111c are formed.

The fitting portion 115 is a hole having a rectangular cross section and is provided in the axial direction of the socket 101. The fitting portion 115 is provided in each socket 101 in the same manner regardless of the type of the socket 101. Insertable. The mounting portion 15 and the fitting portion 115 may have any shape as long as they can be fitted to each other. An engaging convex portion 115 a is provided on the inner peripheral surface of the fitting portion 115 at a position facing the engaging concave portion 15 a of the mounting portion 15 . In addition, on the outer peripheral portion of the fitting portion 115, detection target portions 114 are individually provided so as to be different for each of the plurality of types of sockets 101a, 101b, and 101c.

The detected portion 114 is a magnet that can be detected by a magnetic sensor. As shown in FIGS. 1 and 4, the magnet 114, which is the part to be detected, is provided so as to face the pickup coil 14, which is the detection part. For example, four magnets 114 are embedded in the outer periphery of the fitting portion 15 in the socket 101a. The two magnets 114a, 114a facing each other with the fitting portion 15 interposed therebetween have N poles on the surfaces facing the pickup coil 14, and the other two magnets 114b, 114b facing each other with the fitting portion 15 interposed therebetween , the surface facing the pickup coil 14 is the south pole. Two magnets 114 are embedded in the socket 101b at positions opposed to each other with the fitting portion 15 interposed therebetween. The surface of one magnet 114a facing the pickup coil 14 is N pole, and the surface of the other magnet 114b facing the pickup coil 14 is S pole. Three magnets 114a are embedded in the socket 101c. All the magnets 114a have the north pole on the surface facing the pickup coil 14 . The number and position of the magnets 114 are not limited. may Either the S pole or the N pole of the magnet 114 may be arranged so as to face the detection section 14 side. In this way, the magnets 114 are provided differently for each socket 101 depending on the combination of number, arrangement and poles.

(Action and effect of torque wrench)
According to the torque wrench T1 of Embodiment 1 configured as described above, when the operator starts the tightening work, the storage unit 16 of the wrench main body 1 stores a plurality of sockets 101 corresponding to a plurality of types in advance. A torque value is stored. A worker attaches the socket 101 corresponding to the target tightening member to the attachment portion 15 so that the engagement protrusion 115a fits into the engagement recess 15a of the wrench body 1, whereby the socket 101 is positioned. When the pick-up coil 14 detects the number, arrangement, and poles of the magnets 114, which are the parts to be detected of the socket 101, the signals are transmitted to the control part 17, and the type of the socket 101 is determined. Then, the control unit 17 refers to the torque value corresponding to the mounted socket 101 from the storage unit 16, and a target torque value suitable for the target tightening member is set. In this manner, the target torque value is set simply by mounting the socket 101, so the operator does not need to set the torque by himself, and human error is less likely to occur. Then, if the tightening work is performed as it is, it is possible to recognize that the target torque value has been reached by means of the display unit 19, sound or vibration that informs whether or not the torque is appropriate, and the work can be easily completed. Further, the positioning mechanism for positioning the socket 101 so that it is mounted at the specified position of the mounting portion 15 is the engaging concave portion 15a and the engaging convex portion 115a. It also becomes possible to attach a general-purpose socket to the wrench body 1 .

As for the positioning mechanism, the uneven shape may be reversed to that of the first embodiment, that is, the wrench main body 1 side may be the engaging convex portion, and the socket 101 side may be the engaging concave portion. By intentionally making the wrench body 1 side into an engagement convex part, it is possible to prevent a worker from erroneously attaching an incompatible general-purpose socket to the wrench body 1, and to prevent human error that may occur when a general-purpose socket is attached. It is possible to prevent target errors.

In the first embodiment, the detection part is the magnetic sensor 14 and the part to be detected is the magnet 114. Since the sensor is a non-contact sensor, the torque wrench T1 has excellent durability. Also, since the control unit 17 can determine the type of the socket 101 based on at least one of the number, arrangement and poles of the magnets 114 detected by the magnetic sensor 14, various types of sockets 101 can be applied.

(Embodiment 2)
FIG. 5 shows a schematic cross-sectional view of essential parts of a torque wrench T2 according to Embodiment 2 of the present invention. In each embodiment below, the same reference numerals are given to the same constituent members as in the first embodiment, and detailed description thereof will be omitted. What differs from the first embodiment is the configuration of the detecting portion 24 of the wrench body 1 and the detected portion 124 of the socket 102 .

The head 11 of the wrench main body 1 is provided with a push switch as the detection section 24 . The push switch 24 is provided so as to fit within the surface of the head 11 that abuts on the socket 102 when in the off state, and is turned on by being pushed inside the head 11 . The number and positions of the push switches 24 are not limited, and they may be provided at any position on the head 11 including the mounting portion 15 as long as they are provided facing the detected portion 124 of the socket 102 .

The socket 102 is provided with a convex portion 124 on the surface that contacts the head portion 11 of the wrench body 1 . The projections 124 are provided in different numbers and positions for each of the plurality of sockets 102 corresponding to different fastening members, and the number and positions are not limited as long as they are provided facing the push switch 24. .

When the socket 102 is attached to the attachment portion 15 at a specified position, the protrusion 124 pushes the push switch 24 inward, and the push switch 24 is turned on. The control unit 17 of the wrench main body 1 determines the type of the socket 102 based on at least one of the number and arrangement of the push switches 24 in the ON state, and refers to the torque value corresponding to the mounted socket 102 from the storage unit 16. Then, a target torque value suitable for the target tightening member is set.

According to the torque wrench T2 of Embodiment 2, the target torque value is set by simply attaching the socket 102 to the attachment portion 15 at the prescribed position, as in the case of Embodiment 1, so human error is less likely to occur. Further, the detection part is the push switch 24 and the detected part is the convex part 124, and the torque value is set based on at least one of the number and arrangement of the push switches in the ON state, so that many types of tightening members can be used. can be determined.

(Embodiment 3)
FIG. 6 shows a schematic cross-sectional view of a main part of a torque wrench T3 according to Embodiment 3 of the present invention. In each embodiment below, the same reference numerals are given to the same constituent members as in the first embodiment, and detailed description thereof will be omitted. What differs from the first embodiment is the configuration of the detecting portion 34 of the wrench body 1 and the detected portion 134 of the socket 103 .

The head 11 of the wrench main body 1 is provided with a pressure sensor as a detection section 34 . The pressure-sensitive sensor 34 detects the pressure at the time of contact and sends a signal, and can detect not only the presence or absence of contact but also the level of the pressure. In FIG. 6, the pressure sensor 34 is provided on the surface of the head 11 that abuts on the socket 103, but the position is not limited, as long as it is provided so as to be able to contact with the detected portion 134 of the socket 103. For example, it may be provided at any position on the head 11 including the mounting portion 15 .

The socket 103 is provided with a convex portion 134 on the surface that contacts the head portion 11 of the wrench body 1 . The protrusion 134 is provided facing the pressure sensor 34 and presses the pressure sensor 34 when attached to the wrench main body 1 . The protruding portion 134 is provided so that the pressing state when contacting the pressure-sensitive sensor 34 is different for each of the plurality of sockets 103 corresponding to different tightening members.

When the socket 103 is attached to the attachment portion 15 at a specified position, the convex portion 134 contacts the pressure sensor 34 , and the pressure sensor 34 detects the pressure and sends a signal to the control portion 17 . The control unit 17 determines the type of the socket 103 based on the detected pressurized state, refers to the torque value corresponding to the mounted socket 103 from the storage unit 16, and determines the target torque suitable for the target tightening member. Value is set.

According to the torque wrench T3 of Embodiment 3, the target torque value is set simply by mounting the socket 103 to the mounting portion 15 at the prescribed position, as in the case of Embodiment 1, so human error is less likely to occur. Further, the detecting portion is the pressure sensor 34, and the detected portion is the convex portion 134. The pressure sensor 34 detects the level of the pressure applied by the convex portion 134, and the torque value is set based on the applied state. , many types of clamping members can be distinguished.

(Embodiment 4)
FIG. 7 shows a schematic cross-sectional view of essential parts of a torque wrench T4 according to Embodiment 4 of the present invention. In each embodiment below, the same reference numerals are given to the same constituent members as in the first embodiment, and detailed description thereof will be omitted. What differs from the first embodiment is the configuration of the detecting portion 44 of the wrench body 1 and the detected portion 144 of the socket 104 .

The head 11 of the wrench main body 1 is provided with a resistance value sensor as the detection portion 44 . The resistance value sensor 44 energizes the detected portion 144 of the socket 104 and detects its electrical resistance value. In FIG. 7, the resistance value sensor 44 has an accommodating portion 44a for the detected portion 144 on the surface of the head 11 that abuts on the socket 104, and the circuit is connected to the detected portion 144 fitted in the accommodating portion 44a. However, as long as the resistance value of the detected portion 144 can be detected, any configuration may be used.

The socket 104 is provided with a conductive portion as the detected portion 144 . The conductive portion 144 is provided so as to protrude from the surface that abuts on the head portion 11 so that it can be fitted into the housing portion 44a provided in the wrench main body 1, and when attached to the wrench main body 1, resistance is generated. A current flows through the circuit of the value sensor 44 . The conductive portion 144 is provided so that the resistance value differs for each of the plurality of sockets 104 corresponding to different fastening members.

When the socket 104 is attached to the attachment portion 15 at a specified position, the conductive portion 144 is fitted into the accommodation portion 44a and connected to the circuit of the resistance value sensor 44, and the resistance value sensor 44 detects the resistance value and the control portion 17 A signal is sent to The control unit 17 determines the type of the socket 104 based on the detected resistance value, refers to the torque value corresponding to the mounted socket 104 from the storage unit 16, and determines the target torque value suitable for the target tightening member. is set.

According to the torque wrench T4 of Embodiment 4, the target torque value is set simply by attaching the socket 104 to the attachment portion 15 at the prescribed position, as in the case of Embodiment 1, so human error is less likely to occur. In addition, the detection portion is the resistance value sensor 44, and the detected portion is the conductive portion 144. Since the torque value is set based on the resistance value of the conductive portion 144, many types of fastening members can be discriminated.

INDUSTRIAL APPLICABILITY As described above, the present invention can be used, for example, in a work site where it is necessary to use a large number of tools for each type of fastening member.

Reference Signs List 1 wrench body 11 head 12 body 13 operation part 14 pickup coil (detection part)
15 Mounting portion 15a Engagement concave portion (positioning mechanism)
16 storage unit 17 control unit 18 wiring 19 display unit 20 grip unit 21 setting button 24 push switch (detection unit)
34 pressure sensor (detection unit)
44 resistance value sensor (detection unit)
101 to 104 socket 111 engagement hole 114 magnet (part to be detected)
115 Fitting portion 115a Engagement convex portion (positioning mechanism)
124 convex portion (detected portion)
134 convex portion (detected portion)
144 conductive part (detected part)
T1-T4 torque wrench

Claims (7)

A torque wrench that includes a plurality of types of sockets to be engaged with a tightening member and a wrench body having a mounting portion that is detachably attached to each socket, and manually tightens the tightening member at a target torque value. In Luquench,
a positioning mechanism for positioning the socket so that it is mounted on the mounting portion at a prescribed position;
a detected part provided individually so as to be different for each of the plurality of types of sockets;
a detection unit provided in the wrench body for detecting the detected portion of the socket when the socket is mounted in the mounting portion at a specified position by the positioning mechanism;
a storage unit that stores a plurality of torque values corresponding to the plurality of types of sockets;
a control unit that determines the type of socket according to the detected part detected by the detection unit, and sets the torque value stored in the storage unit corresponding to the type of socket as the target torque value. Characteristic torque wrench. A torque wrench according to claim 1,
The detected part of the socket is at least one magnet,
The detection unit is a magnetic sensor that detects a magnetic signal emitted by the magnet when the socket is attached to the attachment unit at a specified position ,
The detecting section is provided around the mounting section on the surface on which the mounting section is provided, and the detected section is provided on a surface facing the surface on which the mounting section is provided,
The torque wrench, wherein the control unit is configured to determine the type of socket based on at least one of the number, arrangement and poles of magnets detected by the magnetic sensor. A torque wrench according to claim 1,
The detected portion of the socket is at least one convex portion,
The detection unit is a press switch that is turned on by being pressed by the projection when the socket is attached to the attachment unit at a specified position ,
The detecting section is provided around the mounting section on the surface on which the mounting section is provided, and the detected section is provided on a surface facing the surface on which the mounting section is provided,
The torque wrench, wherein the control section is configured to determine the type of the socket based on at least one of the number and arrangement of the push switches in the ON state. A torque wrench according to claim 1,
The detected part of the socket is a convex part,
The detection unit is a pressure-sensitive sensor that detects a state of pressure from the projection when the socket is attached to the attachment unit at a specified position ,
The detecting section is provided around the mounting section on the surface on which the mounting section is provided, and the detected section is provided on a surface facing the surface on which the mounting section is provided,
The torque wrench, wherein the control section is configured to determine the type of the socket based on the pressurized state detected by the pressure sensor. A torque wrench according to claim 1,
The part to be detected of the socket is a conductive part,
The detection unit is a resistance value sensor that detects the resistance value of the conductive unit when the socket is attached to the attachment unit at a specified position,
The torque wrench, wherein the control section is configured to determine the type of socket based on the resistance value detected by the resistance value sensor. In the torque wrench according to any one of claims 1 to 5,
Each socket is provided with a fitting portion into which the mounting portion of the wrench body is detachably fitted,
The positioning mechanism has an engaging recess provided in the mounting portion of the wrench body, and an engaging protrusion provided in the fitting portion of the socket and engaged with the engaging recess. lucrench. In the torque wrench according to any one of claims 1 to 5,
Each socket is provided with a fitting portion into which the mounting portion of the wrench body is detachably fitted,
The positioning mechanism is characterized by having an engagement projection provided on the mounting portion of the wrench body and an engagement recess provided on the fitting portion of the socket and engaged with the engagement projection. Torque Wrench.

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