JP6937018B2 - Tightening tools and work management system - Google Patents

Description

The present invention relates to a tightening tool and a work management system.

The tightening work is a work of tightening a tightening member such as a bolt or a nut to a tightening point using a tightening tool such as a torque wrench. In the tightening work, various techniques for saving work records, inspection records, etc. to realize traceability are known.

In a torque wrench, in order to realize traceability of tightening work, a technique including an IC tag detection unit for detecting an IC tag incorporated in a fastening member is disclosed (see, for example, Patent Document 1). Further, in the power tool, in order to improve the anti-theft property without deteriorating the usability, a technique including an authentication unit for authenticating the user's usage authority is disclosed (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2016-093873 Japanese Unexamined Patent Publication No. 2012-061543

However, in the conventional techniques including Patent Documents 1 and 2, it is difficult to improve the traceability by surely associating the information that can identify the worker with the tightening tool used for the tightening work.

An object of the present invention is to improve traceability in tightening work using a tightening tool.

The present invention provides an engaging portion that engages with a tightening member, a head portion that is substantially rod-shaped and has an engaging portion at one end, a grip portion that is provided at the other end of the head portion, and a grip portion that is provided for work. The acquisition unit that acquires the worker identification information, which is the biological identification information based on the characteristic points of the user's hand, collates the worker identification information acquired by the acquisition unit with the sample information of the worker identification information acquired in advance. It is provided with a calculation unit for performing.

Further, in the present invention, the engaging portion is provided at a position including an action point with respect to the tightening member, the head portion is provided at a position including a fulcrum with respect to the tightening member, and the acquisition portion provides a force point with respect to the tightening member. It may be provided at the including position.

Further, in the present invention, the information based on the feature points of the worker's hand may be the fingerprint information of the worker's hand.

Further, in the present invention, the information based on the feature points of the worker's hand may be the information of the vein of the worker's hand.

Further, in the present invention, the information based on the characteristic points of the worker's hand may be the information of the palm shape of the worker's hand.

Further, in the present invention, the calculation unit may specify the gripping state of the acquisition unit by the operator based on the result of the collation process.

Further, the present invention may include a notification unit that notifies the operator of the gripping state specified by the calculation unit.

Further, the present invention may include a work detection unit that detects a tightening operation for tightening the tightening member.

Further, in the present invention, the work detection unit may be a strain detection unit that detects the amount of strain generated in the tightening tool by the tightening work.

Further, in the present invention, the work detection unit may be a tightening frequency measuring unit that measures the number of tightening operations.

The present invention includes a tightening tool that can be used for tightening work of a tightening member, and a management server that manages work information related to the tightening work using the tightening tool. An engaging portion that engages with an attached member, a head portion that is substantially rod-shaped and has an engaging portion at one end, a grip portion that is provided at the other end of the head portion, and a grip portion that is provided on the grip portion and is a feature of the operator's hand. It is provided with an acquisition unit for acquiring worker identification information which is biometric information based on points, and a management unit for managing the worker identification information acquired by the tightening tool as work information.

Further, in the present invention, the management server performs collation processing between the worker identification information acquired by the acquisition unit and the sample information of the worker identification information acquired in advance, and transmits the result of the collation processing to the tightening tool. The tightening tool may include a work detection unit, which detects a tightening operation for tightening the tightening member according to the result of the collation process.

Further, in the present invention, the tightening tool performs collation processing between the worker identification information acquired by the acquisition unit and the sample information of the worker identification information acquired in advance, and outputs the result of the collation processing. It is equipped with a work detection unit that detects the tightening work that tightens the tightening member according to the result of the collation process, and the management server, the management unit, and the tightening work that the result of the collation process and the work detection unit detect. May be associated and managed as work information.

According to the present invention, traceability in tightening work using a tightening tool can be improved.

It is a schematic diagram which shows the embodiment of the work management system which concerns on this invention. It is a front view of the torque wrench which shows the embodiment of the tightening tool which concerns on this invention. It is a bottom view of the torque wrench shown in FIG. It is a partial cross-sectional view which shows the internal structure of the torque wrench shown in FIG. FIG. 5 is a partial cross-sectional view showing an internal structure of the torque wrench shown in FIG. 2 in a state where a load equal to or higher than a predetermined set torque value is applied. It is a functional block diagram of the torque wrench shown in FIG. It is a perspective view of the tool station of the work management system shown in FIG. It is a functional block diagram of the computer of the tool station shown in FIG. It is a flowchart which shows the example of the worker registration processing by the torque wrench shown in FIG. It is a flowchart which shows the example of the work management processing by the torque wrench shown in FIG. It is a figure which shows an example of the screen display which shows the worker authentication result by the torque wrench shown in FIG. It is a figure which shows another example of the screen display which shows the worker authentication result by the torque wrench shown in FIG. It is a figure which shows an example of the screen display which shows the work information by the torque wrench shown in FIG. It is a figure which shows an example of the screen display which shows the error notification by the torque wrench shown in FIG. It is a front view of the torque wrench which shows another embodiment of the tightening tool which concerns on this invention. It is a schematic diagram which shows the MCU and the strain gauge of the torque wrench shown in FIG.

[Embodiment 1]
Hereinafter, embodiments of the tightening tool and work management system according to the present invention will be described with reference to the drawings.

[Work management system configuration]
FIG. 1 is a schematic view showing an embodiment of a work management system 1 according to the present invention. As shown in FIG. 1, the work management system 1 includes a torque wrench 10, a management server S, a computer 101, and the like.

The torque wrench 10 is an embodiment of a tightening tool according to the present invention that can be used for tightening a tightening member by an operation of an operator. The management server S functions as a management unit that manages information related to tightening work using the torque wrench 10 (hereinafter referred to as “work information”). The computer 101 is a so-called tablet-type computer, and is an example of a notification unit that notifies an operator of work information related to tightening work.

In the work management system 1, the torque wrench 10, the management server S, and the computer 101 are connected to various computer networks N such as WAN (Wide Area Network) or LAN (Local Area Network) by wired communication or wireless communication.

The work management system 1 is connected to the computer network N via an information processing terminal such as a computer 400 connected to the wireless LAN router 500 or smartphones 300, 300A, 300B, such as torque wrench 10A, 10B, 10C. May be good. Further, in the work management system 1, the tightening tool according to the present invention, such as the torque wrench 10D, may be directly connected to the computer network N without going through the information processing terminal.

In the embodiment of the present invention described below, the torque wrench 10 acquires the worker identification information which is the biological identification information based on the feature points of the worker's hand, and the acquired worker identification information and the worker previously acquired. Performs collation processing with the sample information of the identification information. Further, the torque wrench 10 identifies the gripping state of the gripped portion by the operator based on the result of the collation process, and informs the operator of the collated result of the worker identification information and the identified gripping state via the display unit of the computer 101. Notify. Further, in the present embodiment, the management server S manages the worker identification information acquired by the torque wrench 10 and the information related to the tightening work as work information.

[Torque wrench configuration]
Hereinafter, a torque wrench according to an embodiment of the tightening tool according to the present invention will be described with reference to the drawings. The torque wrench makes the operator recognize that the tightening torque has reached a torque value set in advance in the tightening tool (hereinafter referred to as "set torque value").

Torque wrenches are roughly classified into mechanical torque wrenches and electronic torque wrenches according to the difference in the configuration for recognizing the set torque value. The mechanical torque wrench notifies the operator that the tightening torque has reached the set torque value by the sound or vibration generated when the tightening torque reaches the set torque value. The electronic torque wrench measures the tightening torque using the amount of strain detected by the strain gauge, and when the measured tightening torque value reaches a predetermined set torque value, the operator visually or audibly. To that effect. The electronic torque wrench is also called a digital torque wrench or a digital torque wrench.

The torque wrench in the following description is a so-called preset type mechanical torque wrench whose set torque value can be changed by an operator's operation without using a tool or the like.

FIG. 2 is a front view of a torque wrench 10 showing an embodiment of a tightening tool according to the present invention. As shown in FIG. 2, the torque wrench 10 includes a case 11, a head unit 12, a head pin 13, a torque value setting unit 18, a rotation angle detection unit 19, a fingerprint reading unit 41, and the like.

The case 11 is a substantially cylindrical member that constitutes the outer shape of the torque wrench 10. The case 11 is also referred to as a main body because it constitutes the outer shape of the substantially cylindrical torque wrench 10. The case 11 houses the components of the torque wrench 10. The case 11 includes a head portion 12 at one end. Further, the case 11 is provided with a torque value setting unit 18 and a rotation angle detection unit 19 at the other end. The other end side of the case 11 functions as a grip portion to be gripped by the user when performing tightening work using the torque wrench 10. An instruction line 111 indicating the position of the force point with respect to the tightening member when the operator applies a force during the tightening operation is displayed at a position that functions as a grip portion of the case 11.

The grip portion is not limited to the one that causes the case 11 itself to function as the grip portion as described above. For the grip portion, for example, a member made of resin or the like separate from the case 11 may be integrally or detachably attached to the case 11.

The fingerprint reading unit 41 is provided at a position including a point of effort with respect to the tightening member. Specifically, the fingerprint reading unit 41 is provided around the indicator line 111 on the surface of the case 11. The fingerprint reading unit 41 electrically acquires information (feature point information) that can identify an individual from a fingerprint, which is an example of bioidentification information based on the feature points of a worker's hand, such as a semiconductor fingerprint sensor. That is, the fingerprint reading unit 41 functions as an acquisition unit that acquires information on the feature points of the fingerprint as worker identification information.

FIG. 3 is a bottom view of the torque wrench 10. The head portion 12 is a substantially rod-shaped member. The head portion 12 includes a ratchet head 121 exposed to the outside of the case 11. The ratchet head 121 corresponds to the position of the fulcrum with respect to the tightening member. The ratchet head 121 is exposed from the case 11. The ratchet head 121 is provided with a socket connection portion 124 so that a socket wrench (for tightening bolts or nuts) (not shown) that engages with the tightening member can be detachably attached. The socket connection portion 124 and the socket wrench attached to the socket connection portion 124 function as an engaging portion that engages with the tightening member. In the torque wrench 10, the engaging portion is located at the point of action on the tightening member.

FIG. 4 is a partial cross-sectional view showing the internal structure of the torque wrench 10. In FIG. 4, in order to show the internal structure of the torque wrench 10, only the housing 198 of the case 11 and the rotation angle detection unit 19 is shown in cross section. As shown in FIG. 4, the components of the torque wrench 10 are housed inside the case 11. The case 11 houses a part of the head portion 12, a head pin 13, a gain adjusting screw 14, a link 15, a slider 16, a spring guide 17, a torque value setting portion 18, and a strain gauge 40. Further, the case 11 is provided with a rotation detection unit 20 for detecting the operation of the case 11 with respect to the head unit 12.

In the head portion 12, the arm 122, the contact portion 123, and the motion detection pin 125 are housed inside the case 11.

The contact portion 123 is provided at an end portion of the arm 122 opposite to the end on the ratchet head 121 side. The contact portion 123 comes into contact with the inner wall of the case 11 when the case 11 rotates. The contact portion 123 emits a sound or vibration that can be recognized by the operator when it comes into contact with the inner wall of the case 11. The contact portion 123 is provided at a position where the inner wall of the case 11 and the arm 122 of the head portion 12 come into contact with each other when the load due to the tightening work is applied to the head portion 12 and the case 11 rotates.

The motion detection pin 125 is provided at an end portion of the arm 122 opposite to the end on the ratchet head 121 side in the longitudinal direction, similarly to the contact portion 123 and the like. The motion detection pin 125 is provided so as to project in the thickness direction of the head portion 12 (direction penetrating the paper surface of FIG. 4). The motion detection pin 125 is provided for detecting the rotation of the case 11 by the rotation detection unit 20.

The head pin 13 is provided at the boundary between the ratchet head 121 and the arm 122. The head pin 13 pivotally supports the case 11 and the head portion 12 with respect to each other. The head pin 13 changes the relative position of the arm 122 in the case 11 when the case 11 rotates about the head pin 13 in the direction of rotation of the tightening member.

The gain adjusting screw 14 is provided at the end of the head portion 12 on the arm 122 side. The gain adjusting screw 14 is provided so as to penetrate in the width direction of the head portion 12. The gain adjusting screw 14 is provided to adjust the gain of the operation of the arm 122 when the tightening torque is applied to the torque wrench 10.

The link 15 is provided between the arm 122 and the slider 16. The link 15 connects the slider 16 and the arm 122 with a link mechanism.

One end of the slider 16 is connected to the arm 122 via the link 15, and the other end is connected to the spring guide 17. The slider 16 moves in the longitudinal direction inside the case 11 when the case 11 rotates with respect to the head portion 12. Further, the slider 16 includes a roller that contacts the inner wall of the case 11. The roller guides the movement of the slider 16 in the case 11.

The spring guide 17 is a substantially cylindrical member. The spring guide 17 is arranged inside the case 11 so that the shaft of the case 11 and the shaft of the spring guide 17 substantially coincide with each other. The spring guide 17 guides the movement of the spring portion 181 of the torque value setting portion 18. The spring guide 17 has a hole in the center of the bottom surface. The other end of the slider 16 is inserted into the hole of the spring guide 17. Further, the spring guide 17 has one end of the spring portion 181 in contact with the other bottom surface.

The torque value setting unit 18 is provided with a spring unit 181, a torque value display unit 182, a setting bolt 183, and a locknut 184 inside the case 11. The torque value setting unit 18 includes a torque value setting grip 185 outside the case 11. The torque value setting unit 18 changes the compressive force of the spring unit 181 by rotating the torque value setting grip 185 to rotate the setting bolt 183 so that the set torque value can be set to an arbitrary value.

The spring portion 181 is a compression spring in which the longitudinal direction of the torque wrench 10 is the compression direction. For the spring portion 181, for example, a coil spring can be used. One end of the spring portion 181 is in contact with the other bottom surface of the spring guide 17 as described above.

The torque value display unit 182 is a substantially cylindrical member arranged inside the case 11. One end of the torque value display unit 182 is in contact with the other end of the spring portion 181 and the other end is arranged so as to face the torque value setting grip 185. The torque value display unit 182 displays a scale indicating a set torque value set on the surface. A detent (not shown) is attached to the inner wall of the case 11. The torque value display unit 182 is provided so as to be slidable in the axial direction of the torque wrench 10 with respect to the detent. Due to this detent, the torque value display unit 182 moves in the axial direction without rotating inside the case 11. Therefore, the scale of the torque value display unit 182 can always be read from the display window provided on the case 11. Further, the torque value display unit 182 is provided with a female screw penetrating in the longitudinal direction at the center portion.

The setting bolt 183 is screwed into the female screw of the torque value display unit 182. The collar-shaped portion of the setting bolt 183 engages with the locknut 184.

The locknut 184 is a substantially disk-shaped member fixed inside the case 11. The locknut 184 is provided with a hole in the center into which the shaft-shaped portion of the setting bolt 183 is inserted.

The torque value setting grip 185 is a substantially cylindrical member provided at the other end of the torque wrench 10. The torque value setting grip 185 has a function as a rotating member. The torque value setting grip 185 is connected to the setting bolt 183 via the rotation angle detecting unit 19 to rotate the setting bolt 183.

The rotation angle detection unit 19 includes a rotation shaft 191, a substrate 192, an encoder unit 193, and a disk 194 inside the housing 198.

The rotating shaft 191 is cooperably connected to the setting bolt 183 and the torque value setting grip 185. The rotating shaft 191 transmits the rotational force from the torque value setting grip 185 rotated by the operator to the setting bolt 183.

The substrate 192 is a member on which electronic components such as an encoder unit 193 and an MCU (Micro Control Unit) described later can be mounted. As the substrate 192, a known electronic circuit board such as a printed circuit board can be used.

The encoder unit 193 includes a light emitting element, a light receiving element, and a signal processing unit. As the encoder unit 193, either an absolute encoder or an incremental encoder, which is generally known as a rotary encoder, can be used.

The light emitting element is, for example, various light sources such as a light emitting diode and a laser diode. The light emitting element functions as a light emitting unit that irradiates light toward the disk 194.

As the light receiving element, for example, a photodiode or the like can be used. The light receiving element functions as a light receiving unit that receives light that has not been changed in the light receiving state by the action of reflection, shading, refraction, or the like by the disk 194 among the light emitted from the light emitting element. The light receiving element outputs a light receiving signal based on the received light.

The center of the disk 194 is inserted through the rotating shaft 191 and rotates together with the rotating shaft 191. The disk 194 functions as a light receiving state changing unit that changes the light receiving state of the light receiving element. The disk 194 includes a light-transmissive (light-shielding) portion and a light-transmitting portion, and changes the light-receiving state of the light-receiving element. Specifically, the disk 194 is made of a light-impermeable resin, and is provided with a light-transmitting portion such as a slit.

The disk 194 changes the light receiving state of the light receiving element by switching between transmission and non-transmission of light from the light emitting element, and obtains a pulse signal based on the rotation angle of the setting bolt 183. This pulse signal is rotation angle information which is electronic information based on the rotation angle of the setting bolt 183 detected by the rotation angle detection unit 19. The rotation angle detection unit 19 outputs rotation angle information as a pulse signal based on the rotation angle of the torque value setting grip 185 and the setting bolt 183 by using a disk that changes the light receiving state of the light receiving element.

The disk 194 is not limited to the transmissive type having a light transmitting portion as described above, and for example, the light from the light emitting element is reflected or refracted by the optical action of a prism or the like to change the light receiving state of the light receiving element 193b. It may be changed.

The rotation detection unit 20 is provided near the motion detection pin 125, that is, near the end of the arm 122 opposite to the end on the ratchet head 121 side in the longitudinal direction. The rotation detection unit 20 is fixed to the case 11 in order to detect the operation of the head unit 12, specifically the case 11 with reference to the arm 122 of the head unit 12. The rotation detection unit 20 may be provided inside the case 11. The rotation detection unit 20 may be provided so that at least a part of the rotation detection unit 20 is exposed from the case 11. In this case, the rotation detection unit 20 may cover an exposed part with a cover (not shown).

The rotation detection unit 20 includes an encoder unit including a light emitting element and a light receiving element, and a detection lever for detecting the operation of the operation detection pin 125. The detection lever causes an optical action such as a prism or a slit that changes the light receiving state of the light receiving element. The rotation detection unit 20 detects information on the rotation of the case 11, specifically, the rotation direction, the rotation amount, and the like, based on the change in the light receiving state (light receiving amount) of the light receiving element by the detection lever. The rotation detection unit 20 may detect the operation of the case 11 with reference to the arm 122 by, for example, a limit switch.

The light emitting element is, for example, various light sources such as a light emitting diode and a laser diode. The light emitting element functions as a light emitting unit that irradiates light toward the light receiving element or the detection lever.

As the light receiving element, for example, a photodiode or the like can be used. The light receiving element is arranged at a position where light from the light emitting element can be received, such as a position facing the light emitting element. The light receiving element functions as a light receiving unit that receives light whose light receiving state is changed by the action of reflection, shading, refraction, or the like by the detection lever among the light emitted from the light emitting element. The light receiving element outputs a light receiving signal based on the received light.

The detection lever is a light transmitting member such as acrylic provided between the light emitting element and the light receiving element. The detection lever is provided with a large number of prisms at equal intervals on the side surface portion, and refracts the light from the light emitting element to transmit the light.

The detection lever rotates about a rotation shaft (not shown). By doing so, the detection lever changes the light transmission state depending on the position of the prism when the light is transmitted. That is, the detection lever functions as a light receiving state changing unit that changes the light receiving state of the light receiving element depending on the difference in position when the light from the light emitting element is transmitted / refracted.

The detection lever is synchronized with the operation of the head portion 12 provided with the motion detection pin 125 by coming into contact with the motion detection pin 125 or the like. That is, since the detection lever of the rotation detection unit 20 is synchronized with the movement of the operation detection pin 125, the rotation detection unit 20 has a rotation operation for obtaining the rotation amount, rotation direction, or rotation angle of the case 11 with respect to the head unit 12. Information can be obtained.

The detection lever is not limited to the one using a prism as described above, and the light receiving state of the light receiving element may be changed by blocking the light from the light emitting element by, for example, a light transmitting portion and a light transmitting portion. ..

The strain gauge 40 is provided at a position where strain is generated during the tightening operation of the torque wrench 10, for example, at an appropriate position on the arm 122 of the head portion 12. The strain gauge 40 is an example of a strain detection unit that detects the amount of strain generated in the tightening tool by the tightening operation. The strain gauge 40 is attached to, for example, the surface of the arm 122 so that the strain generated in the arm 122 can be accurately detected.

As shown in FIG. 4, the number of strain gauges 40 is not limited to one provided for one torque wrench 10, and for example, a plurality of strain gauges 40 may be provided for one torque wrench 10. Further, in the torque wrench 10, a strain detection device other than the strain gauge 40 may be used.

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

When the torque value setting grip 185 is rotated, the setting bolt 183 rotates together with the torque value setting grip 185. When the setting bolt 183 rotates, the torque value display unit 182 moves inside the case 11. The torque value display unit 182 changes the compressive force of the spring portion 181 by compressing the spring portion 181. The operator confirms that the set torque value indicated by the torque value display unit 182 is a predetermined value, stops the rotation operation of the torque value setting grip 185, and shifts to the tightening operation.

FIG. 5 is a partial cross-sectional view showing the internal structure of the torque wrench 10 in a state where a load equal to or higher than a predetermined set torque value is applied. As shown in FIG. 5, in the torque wrench 10, when the tightening member is tightened, the compressive force from the spring portion 181 acts on the head portion 12 via the slider 16 and the link 15. When the tightening torque reaches the torque value set by the torque value setting unit 18 (hereinafter referred to as "set torque value") by the tightening work with the torque wrench 10, the force generated by the tightening torque is generated from the spring portion 181. Exceeds compression force.

At this time, the case 11 and the slider 16 move from the state shown in FIG. 4 to the state shown in FIG. The case 11 rotates about the head pin 13, and the inner wall of the case 11 comes into contact with the contact portion 123. In the torque wrench 10, when the contact portion 123 comes into contact with another place such as the inner wall of the case 11, sound and vibration are generated from the torque wrench 10. In the torque wrench 10, the case 11 comes into contact with other parts to generate sound or vibration, so that the operator recognizes that the tightening torque has reached the set torque value.

[Torque wrench function block]
Next, the functional block of the torque wrench 10 will be described.

FIG. 6 is a functional block diagram of the torque wrench 10. As shown in FIG. 6, in the torque wrench 10, the rotation angle detection unit 19, the rotation detection unit 20, the strain gauge 40, and the fingerprint reading unit 41 are connected to an MCU (Micro Control Unit) 30 capable of executing a computer program. doing. In the present embodiment, the rotation angle detection unit 19, the rotation detection unit 20, the strain gauge 40, and the fingerprint reading unit 41 connected to the MCU 30 function as work detection units for detecting the tightening operation of tightening the tightening member. Further, the calculation unit 31 of the MCU 30 performs collation processing between the worker identification information acquired by the fingerprint reading unit 41 and the sample information of the worker identification information acquired in advance. Further, the calculation unit 31 identifies the gripping state of the fingerprint reading unit 41 by the operator based on the result of the collation process.

The elements constituting the rotation angle detection unit 19 will be described. As described above, the light emitting element 193a irradiates the disk 194 with light. The light receiving element 193b receives the light emitted from the light emitting element 193a whose light receiving state has not been changed by the disk 194. The light receiving element 193b outputs a light receiving signal based on the received light.

The signal processing unit 193c performs signal processing such as amplification on the light receiving signal output from the light receiving element 193b. The signal processing unit 193c outputs the signal-processed received signal to the calculation unit 31. Further, the signal processing unit 193c controls the driving power and the operation of the light emitting element 193a based on the amount of received light and the like in order to save power and stabilize the operation.

The elements constituting the rotation detection unit 20 will be described. The rotation detection unit 20 includes an encoder unit 21 including a light emitting element 211 and a light receiving element 212, and a detection lever 22. The rotation detection unit 20 rotates the case 11, specifically, the rotation direction and rotation, based on the change in the light receiving state (light receiving amount) of the light receiving element 212 that receives the light from the light emitting element 211 of the encoder unit 21. Detects momentum, etc.

As described above, the light emitting element 211 irradiates light toward the light receiving element 212 and the detection lever 22. The light receiving element 212 receives the light whose light receiving state is changed by the detection lever 22 among the light emitted from the light emitting element 211. The light receiving element 212 outputs a light receiving signal based on the received light.

As described above, the detection lever 22 changes the light receiving state of the light receiving element 212 due to the difference in position when the light from the light emitting element 211 is transmitted and refracted.

In the rotation detection unit 20, since the detection lever 22 is synchronized with the movement of the motion detection pin 125, the rotation amount, rotation direction, number of rotations, or rotation angle of the case 11 with respect to the head unit 12 can be obtained. Information on the rotation operation can be acquired.

The signal processing unit 24 performs signal processing such as amplification on the light receiving signal output from the light receiving element 212. At this time, the signal processing unit 24 detects the amount of rotation of the detection lever 22 based on the difference in the light receiving state caused by the detection lever 22. The calculation unit 31 can calculate the rotation amount, rotation angle, and rotation direction of the case 11 with respect to the head unit 12 provided with the motion detection pin 125 from the rotation amount of the detected detection lever 22.

Further, the signal processing unit 24 outputs the rotation amount information, which is electronic information based on the rotation amount of the detected motion detection pin 125, to the calculation unit 31. Further, the signal processing unit 24 controls the driving power and the operation of the light emitting element 211 based on the amount of received light and the like in order to save power and stabilize the operation.

The strain gauge 40 electrically detects the amount of strain generated in the arm 122. The strain gauge 40 outputs information on the detected strain amount. The strain gauge 40 detects the amount of strain according to the change in the electric resistance value when the metal material is strained, for example. The amount of strain electrically detected by the strain gauge 40 is input to the calculation unit 31 of the MCU 30.

As described above, the fingerprint reading unit 41 electrically acquires information on the feature points of the fingerprint, which is an example of the biometric identification information. The biometric identification information electrically acquired by the fingerprint reading unit 41 is input to the calculation unit 31 of the MCU 30.

In the present invention, when the biological identification information based on the characteristic points of the hand as the worker identification information is acquired, the information is not limited to the fingerprint information of the worker's hand described above, and for example, the vein of the worker's hand. Information and information on the palm shape of the worker's hand can be used.

The MCU 30 uses the processing of the set torque value calculation program of the torque value setting unit 18, the calculation processing of detecting the rotation operation of the case 11 with respect to the head unit 12 of the rotation detection unit 20, and the strain amount acquired from the strain gauge 40. Executes the calculation process of the tightening torque based on. The MCU 30 also functions as a tightening count measuring unit that measures the number of rotations of the case 11, that is, the number of tightening in the tightening work, based on the rotation operation of the case 11 with respect to the head portion 12 detected by the rotation detection unit 20. do.

The MCU 30 is the operator identification information acquired by the fingerprint reading unit 41 in order to realize the function of the calculation unit of the tightening tool according to the present invention, that is, the fingerprint which is the biological identification information based on the characteristic points of the operator's hand. Collation processing is performed between the feature point information and the sample information of the feature point of the fingerprint acquired in advance. The MCU 30 also performs a process of registering sample information of biometric identification information.

When the MCU 30 calculates and outputs the set torque value, the information about the work date and time and the worker may be output in correspondence with the set torque value.

The communication unit 32 manages information related to the tightening work of the tightening member including either the set torque value data or the rotation angle information output by the calculation unit 31, and work information such as the set torque value data. It is transmitted to an external device (information processing device) such as the management server S. The communication path by the communication unit 32 may be either wireless communication or wired communication. Further, the type of communication format between the communication unit 32 and the external device is not limited, and for example, Bluetooth (registered trademark), infrared communication, WAN (Wide Area Network), LAN (Local Area Network) and the like can be used.

[Computer configuration]
FIG. 7 is a perspective view of the tool station of the work management system 1. As shown in FIG. 7, the tool station 100 is a wagon-type storage fixture provided with a plurality of drawers for storing tools. The tool station 100 is provided with a tablet-type computer 101.

FIG. 8 is a functional block diagram of the computer 101 of the tool station 100. As shown in FIG. 8, the computer 101 includes a calculation unit 102, a secondary storage device 105, an input unit 106, an output unit 107, and the like.

The arithmetic unit 102 is composed of a CPU (Central Processing Unit) 104 and a main memory (MM) 103 such as a RAM (Random Access Memory), and performs processing based on an application program including a work management program.

The secondary storage device 105 is connected to the calculation unit 102 via the bus (BUS) 108. A large-capacity storage medium such as a ROM (Read Only Memory) or a hard disk drive is used as the secondary storage device 105. The secondary storage device 105 has an operating system (OS) installed for the computer 101 to function normally. A computer-executable work management program created to realize a work management device that executes the work management method according to the present invention is installed in the secondary storage device 105. In addition, other commonly used application programs are also installed in the secondary storage device 105.

In the tablet-type computer 101, which is an example of various information processing terminals, the CPU 104 loads (reads) the work management program in the secondary storage device 105 into the MM 103 and executes them sequentially as needed. By doing so, the computer 101 executes a process as a notification unit that notifies the operator of the gripping state of the torque wrench 10 specified by the torque wrench 10. Further, the computer 101 may execute each process as a work management device.

The input unit 106 is a device such as a touch panel or a camera for an operator to input various information. Further, the input unit 106 may be a pointing device such as a keyboard (not shown) or a mouse. The output unit 107 is a device for outputting various information to the operator, such as a display superimposed on the touch panel and a printer (not shown).

[Configuration of management server S]
The management server S is an example of various information processing terminals like the computer 101. That is, the management server S includes a calculation unit, a secondary storage device, an input unit, an output unit, and the like. Similar to the computer 101, the management server S loads (reads) the work management program of the secondary storage device into the main memory and sequentially executes it as needed by the CPU of the arithmetic unit. By doing so, the management server S executes the process as the management unit that manages the worker identification information acquired by the tightening tool as the work information. Further, the management server S may also perform the registration process of the sample information of the biometric identification information. Further, the management server S may execute processing related to work information such as calculation processing of the set torque value of the torque value setting unit 18.

[Worker registration process]
Next, the worker registration process (registration process of sample information of worker identification information) in the work management system 1 will be described. In the following description, the operator registration process is executed by the calculation unit 31 of the MCU 30 of the torque wrench 10.

FIG. 9 is a flowchart showing an example of a worker registration process (registration process of sample information of worker identification information) by the torque wrench 10. As shown in FIG. 9, in the torque wrench 10, when the power is turned on (ON) (S1), the fingerprint reading unit 41 can read the fingerprint.

The operator holds the torque wrench 10 (S2). In order to register the fingerprint, the operator needs to grip the fingerprint reading unit 41 provided in the gripping portion of the torque wrench 10. The calculation unit 31 of the MCU 30 confirms whether or not the fingerprint of the operator has been read by the fingerprint reading unit 41 (S3).

When the fingerprint reading unit 41 confirms that the fingerprint has been read (S3: YES), the calculation unit 31 registers the information of the fingerprint feature points from the fingerprint reading unit 41 in a memory or the like (S4). On the other hand, when the fingerprint reading unit 41 does not confirm the fingerprint reading (S3: NO), the calculation unit 31 returns to the process of S3 for confirming the fingerprint again via S2.

After the fingerprint registration is completed, the calculation unit 31 performs a process of registering the sample information of the worker identification information by associating the registered fingerprint with the worker information (S5). Here, the worker information used for the worker identification information can also be input via other information processing devices constituting the work management system 1, such as the management server S and the computer 101. Further, the worker's information can be directly registered in the torque wrench 10 by configuring the torque wrench 10 so as to enable wired or wireless information communication with an information storage medium or an information processing device.

The sample information of the registered worker identification information is stored in the memory of the torque wrench 10 or the ROM of the management server S functioning as the secondary storage device 105 of the computer 101 or the management unit. After registering the sample information of the worker identification information, the calculation unit 31 ends the process when the power is turned off (S6).

In the torque wrench 10 or the work management system 1, the sample information of the worker identification information described above is not registered, and the sample information of the worker identification information registered in advance in the torque wrench 10 or the management server S or the like is not performed. May be used.

[Work management process]
FIG. 10 is a flowchart showing an example of work management processing by the torque wrench 10. As shown in FIG. 10, in the torque wrench 10, when the power is turned on (ON) (S101), the fingerprint reading unit 41 can read the fingerprint. The calculation unit 31 of the MCU 30 confirms whether or not the fingerprint of the operator has been read by the fingerprint reading unit 41 (S102).

When the fingerprint is read by the fingerprint reading unit 41 (S102: YES), the calculation unit 31 executes a communication process of receiving information on the feature points of the fingerprint from the fingerprint reading unit 41 (S103).

When the fingerprint reading unit 41 cannot read the fingerprint (S102: NO), the calculation unit 31 determines whether or not a predetermined time has elapsed (whether or not a timeout has occurred) (S104). The calculation unit 31 returns to the process of S102 when it is not a timeout (S104: NO).

When the fingerprint reading unit 41 cannot read the fingerprint continuously for a predetermined time (S104: YES), the calculation unit 31 has an abnormality in the fingerprint sensor of the fingerprint reading unit 41, a fingerprint reading error, or the like. , It is determined that some abnormality has occurred in the fingerprint reading process (S105).

After the worker identification information is acquired by the process of S103, the calculation unit 31 performs a collation process between the acquired worker identification information and the sample information of the worker identification information acquired in advance (S106). The calculation unit 31 performs collation processing via the computer network N in order to display a display screen (hereinafter referred to as “result display screen”) for performing notification according to the result of collation processing on the output unit 107 of the computer 101. The information corresponding to the result of is output to the computer 101.

When the acquired worker identification information and the sample information are collated as a result of the collation processing of the worker identification information (S106: YES), the calculation unit 31 is a regular worker in which the worker is registered in advance. Can be judged. Further, since the calculation unit 31 was able to appropriately execute the collation process of the worker identification information, the calculation unit 31 specifies the gripping state of whether or not the worker properly grips the gripping portion at the position of the point of effort of the torque wrench 10. However, it is possible to determine whether or not the gripping state is appropriate. Then, the calculation unit 31 notifies the operator of the gripping state specified by the output unit 107 of the computer 101 or the like. In this case, a regular worker can carry out the tightening operation while appropriately grasping the position of the point of effort of the torque wrench 10 (S107).

FIG. 11 is a diagram showing an example of a screen display showing the result of worker authentication by the torque wrench 10. As shown in FIG. 11, the calculation unit 31 of the torque wrench 10 displays the result display screen 1071 of the collation process on the output unit 107 of the computer 101 when the collation process of the worker identification information can be appropriately executed. Can be made to. For example, a fingerprint image 1072 of an authenticated worker can be displayed on the result display screen 1071.

If the acquired worker identification information and the sample information cannot be collated as a result of the collation process of the worker identification information (S106: NO), the calculation unit 31 determines that the collation process has resulted in an error (S108). ). When the collation process results in an error, for example, if the worker who is trying to use the torque wrench 10 is a non-regular worker who is not registered in advance, even a regular worker is in the position of emphasis. This is the case when the fingerprint reading unit 41 is not properly gripped.

FIG. 12 is a diagram showing another example of screen display showing the result of worker authentication by the torque wrench 10. As shown in FIG. 12, when an error occurs in the collation process of the worker identification information, the calculation unit 31 of the torque wrench 10 displays a result display screen 1073 for notifying that the collation process was an error. It can be displayed on the output unit 107 of the computer 101. On the result display screen 1073, for example, an image for notifying that the operator does not properly grasp the fingerprint reading unit 41 at the point position of the torque wrench 10 can be displayed.

When the tightening operation is performed, the strain gauge 40 outputs the electrically detected strain amount. The calculation unit 31 acquires the output of the strain amount from the strain gauge 40.

After the strain gauge 40 outputs, when the tightening torque reaches the set torque value, the case 11 rotates with respect to the head portion 12. The rotation detection unit 20 detects the rotation operation of the case 11 by detecting the operation of the operation detection pin 125 of the head unit 12. The calculation unit 31 acquires data related to detection of the rotational movement of the case 11 with respect to the head unit 12 output from the rotation detection unit 20, that is, counting of tightening operations at the set torque value. This process is an example of a process as a tightening frequency measuring unit that measures the number of tightening operations.

The calculation unit 31 determines whether or not work information such as an actually measured value of the tightening torque and a count of the tightening work can be acquired based on the data from the strain gauge 40 and the rotation detection unit 20 ( S109).

When the work information can be acquired (S109: YES), the calculation unit 31 determines that the information necessary for recording the work information has been obtained, and obtains the result of the fingerprint collation process and the information related to the tightening work. Is associated and managed as work information, and work information recording processing is performed (S110). If the work information cannot be acquired (S109: NO), the calculation unit 31 determines that the acquisition of the information necessary for recording the work information has resulted in an error (S111).

FIG. 13 is a diagram showing an example of a screen display showing work information managed by the torque wrench 10. As shown in FIG. 13, on the screen displaying the work information (hereinafter referred to as “work information display screen 1075”), various information necessary for the traceability of the tightening work can be displayed on the output unit 107. On the work information display screen 1075, for example, a code for identifying the worker's name / worker (worker code), a set torque value in the tightening work, and an actual measured torque based on the strain amount acquired from the strain gauge 40 are displayed. You can display the value, the time required for the work, the date and time of the work, and so on. The management server S manages such work information in association with the worker identification information acquired by the tightening tool.

As described above, the calculation unit 31 determines that there is some error in the acquisition process of any of the information necessary for recording the work information in each process of S105, 108, 111. The calculation unit 31 outputs information for notifying these errors from a notification unit provided in the torque wrench 10 or the computer 101 (S112). After outputting the information for notifying the error in S112, the calculation unit 31 may record the error record as work information in the process of S110.

FIG. 14 is a diagram showing an example of a screen display (hereinafter referred to as “error notification screen 1074”) showing an error notification by the torque wrench 10. As shown in FIG. 14, on the error notification screen 1074 in the tightening operation, an error code corresponding to the error of each of the above processes, information for notifying the operator of the content of the error of each process, countermeasures, and the like are displayed. ..

As described above, according to the work management system 1, the collation process of the worker identification information and the collated worker identification information and the work information can be managed in association with each other. Therefore, according to the work management system 1, traceability in the tightening work using the tightening tool can be improved.

As described above, according to the work management system 1, when the calculation unit 31 of the torque wrench 10 can appropriately execute the collation process of the worker identification information, the operator determines the collation process based on the result of the collation process. The gripping state of the fingerprint reading unit 41 can be specified. Therefore, according to the work management system 1, the operator can surely grasp the position of the point of effort of the torque wrench 10 and surely execute an appropriate tightening work.

[Embodiment 2]
Next, another embodiment of the tightening tool according to the present invention will be described. In the embodiment described below, the torque wrench 10A, which is an example of the tightening tool according to the present invention, will be described. Further, in the following description, description of points common to the above-described embodiments will be omitted.

FIG. 15 is a front view of the torque wrench 10A showing another embodiment of the tightening tool according to the present invention. Further, FIG. 16 is a schematic view showing the MCU and strain gauge of the torque wrench 10A. As shown in FIGS. 15 and 16, in the torque wrench 10A according to the present embodiment, the tightening member is tightened by the torque value measuring unit 4 that measures the tightening torque using the strain amount detected by the strain gauge 40. An electronic torque wrench that acquires torque values.

The torque wrench 10A includes a main body 2, a ratchet head 3, a torque value measuring unit 4, a display unit 5, a grip unit 6, an MCU 30, a strain gauge 40, and a fingerprint reading unit 41.

The main body 2 is, for example, a metal rod-shaped member. The main body 2 is gripped by an operator during work to enable the torque wrench 10A to be operated. A ratchet head 3 is provided at one end of the main body 2 as in the torque wrench 10. The ratchet head 3 is provided with an engaging portion that engages with the socket. A socket corresponding to the type and dimensions of a tightening member (not shown) such as bolts and nuts can be attached to the engaging portion. The engaging portion engages the torque wrench 10A with the tightening member via the socket. Further, a grip portion 6 for an operator to grip is provided at the other end of the main body portion 2.

The torque value measuring unit 4 includes a strain gauge 40 attached to a main body unit 2 that functions as a strain generating body, and an MCU 30.

The torque value measuring unit 4 measures the amount of strain generated in the main body 2 when the tightening member is tightened with the torque wrench 10A by the strain gauge 40. The torque value measuring unit 4 calculates the tightening torque when tightening the tightening member based on the measured strain amount. The torque value measuring unit 4 displays the calculated tightening torque value on the display unit 5.

The MCU 30 performs a process of calculating an actually measured value of the tightening torque based on the amount of strain measured by the strain gauge 40, and a process of displaying the calculated tightening torque value on the display unit 5. In addition to the above processing, the MCU 30 performs the registration processing of the sample information of the worker identification information shown in FIG. 9 and the work management processing shown in FIG. 10 by the calculation unit 31 in the same manner as the MCU 30 of the torque wrench 10 described above. ..

In the torque wrench 10A, the torque value measuring unit 4 or the display unit 5 functions as a notification unit. The torque value measuring unit 4 is provided with an audio output unit (not shown) such as a speaker and a light emitting unit (not shown) such as an LED (Light Emitting Diode). The torque value measuring unit 4 notifies the result of the sample information registration process and the work management process of the worker identification information by the sound from the sound output unit or the light from the light emitting unit.

The display unit 5 notifies the same information as the notification of the result of the work management process described above. Here, the display mode of the notification of the result of the work management process by the display unit 5 is not limited to the same as the display screen described above, and may be simplified by, for example, only using character information.

The tightening tool according to the present invention is not limited to the preset type torque wrench 10 described above. The tightening tool according to the present invention is, for example, a so-called pre-lock type torque wrench in which the operator cannot change the set torque value unless a setting tool or the like is used, or another tightening tool such as a torque driver. May be good.

[Other Embodiments]
In the embodiment described above, the torque wrench 10 performs collation processing of the acquired worker identification information and identification processing of the gripping state of the gripping portion based on the result of the collation processing. Then, it is not limited to this. In the work management system of the present invention, the management server S or the computer 101 may perform each process shown in the flowcharts of FIGS. 9 and 10 above with respect to the worker identification information acquired by the torque wrench 10. That is, the management server S or the computer 101 performs each process of registering the sample information of the worker identification information, collating the worker identification information, specifying the gripping state of the gripping portion based on the collation result, and managing the work information. You may.

1: Work management system 2: Main body 3: Ratchet head 4: Torque value measurement unit 5: Display unit 6: Grip unit 10: Torque wrench 11: Case 12: Head unit 13: Head pin 14: Gain adjustment screw 15: Link 16 : Slider 17: Spring guide 18: Torque value setting unit 19: Rotation angle detection unit 20: Rotation detection unit 21: Encoder unit 22: Detection lever 24: Signal processing unit 31: Calculation unit 32: Communication unit 40: Strain gauge 41 : Fingerprint reader 100: Tool station 101: Computer 102: Calculation unit 104: CPU
105: Secondary storage device 106: Input unit 107: Output unit 108: Bus 111: Indicator line 121: Ratchet head 122: Arm 123: Contact unit 124: Socket connection unit 125: Operation detection pin 181: Spring unit 182: Torque value Display unit 183: Setting bolt 184: Locknut 185: Torque value setting grip 191: Rotating shaft 192: Board 193: Encoder unit 193a: Light emitting element 193b: Light receiving element 193c: Signal processing unit 194: Disk 198: Housing 211: Light emitting Element 212: Light receiving element 300: Smartphone 400: Computer 500: Wireless LAN router 1071: Result display screen 1072: Fingerprint image 1073: Result display screen 1074: Error notification screen 1075: Work information display screen N: Computer network S: Management server

Claims (13)

The engaging part that engages with the tightening member,
A head portion that is substantially rod-shaped and has the engaging portion at one end, and a head portion.
A grip portion provided at the other end of the head portion and
An acquisition unit provided on the grip portion to acquire worker identification information, which is biometric identification information based on the feature points of the worker's hand,
An arithmetic unit that performs collation processing between the worker identification information acquired by the acquisition unit and the sample information of the worker identification information acquired in advance.
With
The acquisition portion is provided on the grip portion including a point of effort with respect to the tightening member, and is gripped by the user during work.
Tightening tool. The engaging portion is provided at a position including a point of action on the tightening member.
The head portion is provided at a position including a fulcrum with respect to the tightening member.
The tightening tool according to claim 1. The information based on the feature points of the worker's hand is the fingerprint information of the worker's hand.
The tightening tool according to claim 1 or 2. The information based on the feature points of the worker's hand is the information of the vein of the worker's hand.
The tightening tool according to any one of claims 1 to 3. The information based on the feature points of the worker's hand is the information of the palm shape of the worker's hand.
The tightening tool according to any one of claims 1 to 4. The calculation unit identifies the gripping state of the acquisition unit by the operator based on the result of the collation process.
The tightening tool according to any one of claims 1 to 5. A notification unit that notifies the operator of the gripping state specified by the calculation unit.
To prepare
The tightening tool according to claim 6. Work detection unit that detects the tightening work that tightens the tightening member,
To prepare
The tightening tool according to any one of claims 1 to 7. The work detection unit is a strain detection unit that detects the amount of strain generated in the tightening tool by the tightening work.
The tightening tool according to claim 8. The work detection unit is a tightening frequency measuring unit that measures the number of tightening operations.
The tightening tool according to claim 8 or 9. A tightening tool that can be used for tightening members and
A management server that manages work information related to the tightening work using the tightening tool, and
With
The tightening tool
An engaging portion that engages with the tightening member,
A head portion that is substantially rod-shaped and has the engaging portion at one end, and a head portion.
A grip portion provided at the other end of the head portion and
An acquisition unit provided on the grip portion to acquire worker identification information, which is biometric identification information based on the feature points of the worker's hand,
With
The acquisition portion is provided on the grip portion including a point of effort with respect to the tightening member, and is gripped by the user during work.
The management server
A management unit that manages the worker identification information acquired by the tightening tool as the work information.
To prepare
Work management system. The management server
An arithmetic unit that performs collation processing between the worker identification information acquired by the acquisition unit and sample information of the worker identification information acquired in advance, and transmits the result of the collation processing to the tightening tool.
With
The tightening tool
Work detection unit that detects the tightening work that tightens the tightening member,
With
When the calculation unit determines that the worker is a registered regular worker based on the result of the collation process, the work detection unit detects the tightening work.
The work management system according to claim 11. The tightening tool
An arithmetic unit that performs collation processing between the worker identification information acquired by the acquisition unit and sample information of the worker identification information acquired in advance and outputs the result of the collation processing.
A work detection unit that detects the tightening work that tightens the tightening member,
With
When the calculation unit determines that the worker is a registered regular worker based on the result of the collation process, the work detection unit detects the tightening work.
The management server
The management unit manages the result of the collation process and the tightening work detected by the work detection unit as the work information in association with each other.
The work management system according to claim 11.

Images