JP2019076980A - Identification plate, torque wrench and torque wrench set - Google Patents

Abstract

To provide an identification plate to be used for managing the order of fastening work of a plurality of fastening members.SOLUTION: An identification plate 10 is mounted on a work-piece W on which fastening work of fastening members B1-B4 is performed. The identification plate 10 has openings 11-14 and marks M1-M4. The openings 11-14 are formed to correspond to each of the fastening members B1-B4, and allow connection of a torque wrench 20 to the fastening members B1-B4 when mounted on the work-piece W. The marks M1-M4 are formed on an external surface of the identification plate 10, along the edges of the openings 11-14 respectively, and have different visual elements.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an identification plate used to determine a fastening position of a fastening member, a torque wrench used with the identification plate, and a torque wrench set provided with an identification plate and a torque wrench.

  In Patent Document 1, a plurality of screws are color-coded by coloring the screws. In addition, color-specifying sensors are provided on the head of the torque wrench, and the color-specifying sensors detect the color of the screw tightened by the torque wrench. Thus, management when tightening a plurality of screws is performed.

  When a plurality of screws are tightened to a work using a torque wrench, the order of performing the tightening work is predetermined. According to Patent Document 1, by detecting the colors of a plurality of color-coded screws, it is possible to grasp the order in which the screw tightening operation is performed.

Japanese Utility Model Publication No. 7-20266

  In patent document 1, since it is necessary to color a several screw beforehand, when performing the fastening operation of a screw, it is complicated. In addition, multiple colored screws must be used for one work, and when multiple screws of the same color are incorrectly attached to the work, grasp the order of tightening work for these screws Can not do it.

  The identification plate which is the first invention of the present application is mounted on a work on which a fastening operation of a plurality of fastening members is performed, and is used to identify the fastening operation on the plurality of fastening members. The identification plate has a plurality of openings and a plurality of marks. The plurality of openings are formed corresponding to each of the plurality of fastening members, and allow connection of the torque wrench to the fastening members when placed on the work. A plurality of marks are formed on the outer surface of the identification plate along the edge of each opening and comprise different visual elements.

  The visual elements include at least one of color, shape and pattern.

  A second invention of the present application is a torque wrench used in a state in which an identification plate is placed on a work on which a fastening operation of a plurality of fastening members is performed.

  The identification plate is used to identify a fastening operation on a plurality of fastening members, and has a plurality of openings and a plurality of marks. The plurality of openings are formed corresponding to each of the plurality of fastening members, and allow connection of the torque wrench to the fastening members when placed on the work. A plurality of marks are formed on the outer surface of the identification plate along the edge of each opening and comprise different visual elements.

  The torque wrench has an imaging unit and a control unit. The imaging unit captures an image of a connection portion with the fastening member. The control unit, based on the mark included in the image captured by the imaging unit, the fastening member in which the fastening member being tightened by the torque wrench is specified based on the predetermined sequence of the tightening operation It is determined whether or not

  A torque wrench set according to a third invention of the present application includes the identification plate according to the first invention of the present application, and a torque wrench. The torque wrench has an imaging unit and a control unit. The imaging unit captures an image of a connection portion with the fastening member. The control unit, based on the mark included in the image captured by the imaging unit, the fastening member in which the fastening member being tightened by the torque wrench is specified based on the predetermined sequence of the tightening operation It is determined whether or not

  According to the present invention, by using the plurality of marks (marks distinguished visually) formed on the identification plate, it is possible to control the order in which the fastening operation of the plurality of fastening members is performed. In addition, since the identification plate is only placed on the work, one identification plate can be used for a plurality of works.

It is a front view of a work. It is a front view of an identification plate. It is a figure which shows the state which mounted the identification plate in the workpiece | work. It is a perspective view of a torque wrench. It is a side view showing a part of torque wrench. It is a block diagram which shows the function structure of a torque wrench. It is a figure which shows the image imaged by the imaging part. It is a figure which shows the display screen of the display part of a torque wrench. It is a flowchart which shows the process which manages tightening operation. It is a flowchart which shows the process which manages tightening operation.

  The present embodiment manages an operation (hereinafter, tightening operation) of tightening a plurality of fastening members (bolts, screws, etc.) attached to a work with a torque wrench. Specifically, in the present embodiment, it is managed whether or not the tightening operation is performed on a plurality of fastening members in accordance with a predetermined order of the tightening operation.

  First, the structure of the work will be described with reference to FIG. FIG. 1 is a front view showing an example of a work W.

  Fastening members B1 to B4 are attached to the work W, and the fastening members B1 to B4 are disposed at mutually different positions. In the present embodiment, the outer surface of the work W is configured to be flat. In the present embodiment, the four fastening members B1 to B4 are attached to the work W, but the number (plurality) of the fastening members can be appropriately determined. Here, the plurality of fastening members may be provided at mutually different positions.

  The fastening members B1 to B4 can be tightened to the work W by using a torque wrench described later. When fastening the fastening members B1 to B4, the fastening members B1 to B4 are fastened in a predetermined order. For example, the fastening member B1, the fastening member B3, the fastening member B2, and the fastening member B4 can be fastened in the order. When managing the fastening operation on the fastening members B1 to B4, it is confirmed whether the fastening members B1 to B4 are fastened in a predetermined order.

  Next, the identification plate placed on the work W will be described with reference to FIG. FIG. 2 is a front view of the identification plate 10. The identification plate 10 is used to grasp the order of tightening operations for the fastening members B1 to B4.

  The identification plate 10 is formed in a flat plate shape and has four openings 11-14. The openings 11 to 14 are formed at positions corresponding to the positions of the fastening members B1 to B4 attached to the work W. In the present embodiment, the opening 11 corresponds to the fastening member B1, the opening 12 corresponds to the fastening member B2, the opening 13 corresponds to the fastening member B3, and the opening 14 corresponds to the fastening member B4. .

  In the present embodiment, four openings 11 to 14 are formed in the identification plate 10 in order to correspond to the four fastening members B1 to B4. Here, the openings may be formed in the identification plate 10 as many as the number of fastening members attached to the work W.

  On the outer surface of the identification plate 10, four marks M1 to M4 are formed. Here, the marks M1 to M4 can be formed only on the front surface of the identification plate 10 shown in FIG. 2, or the marks M1 to M4 can be formed on the front and back surfaces of the identification plate 10 shown in FIG.

  The marks M1 to M4 are formed in the same shape but different in color from each other. The difference in color among the marks M1 to M4 may be such that all colors of the marks M1 to M4 can be distinguished. The mark M 1 is formed in a ring shape along the edge of the opening 11. The mark M 2 is formed in a ring shape along the edge of the opening 12. The mark M3 is formed in a ring shape along the edge of the opening 13. The mark M4 is formed in a ring shape along the edge of the opening.

  In the identification plate 10 of the present embodiment, the colors of the marks M1 to M4 are different from each other, but the present invention is not limited to this. That is, all the marks M1 to M4 may be visually distinguishable. As elements that can be distinguished visually (visual elements), there are shapes and patterns as well as colors. For this reason, the marks M1 to M4 can be distinguished by using at least one element of color, shape and pattern. The shapes of the marks M1 to M4 are, for example, the shapes of the outer edges of the marks M1 to M4 shown in FIG. When forming a pattern on the marks M1 to M4, the pattern can be formed in the colored area shown in FIG.

  FIG. 3 shows a state in which the identification plate 10 is placed on the work W. The identification plate 10 is superimposed along the surface of the work W.

  When the identification plate 10 is placed on the work W, as shown in FIG. 3, the fastening members B1 to B4 are respectively positioned inside the openings 11 to 14. Although the torque wrench mentioned later is connected to fastening members B1-B4, in order to secure the connection space of a torque wrench to fastening members B1-B4, the wall surface of openings 11-14 separates from fastening members B1-B4. There is. The diameter of the openings 11 to 14 can be appropriately determined in consideration of this point.

  By placing the identification plate 10 on the work W, the marks M1 to M4 are assigned to the fastening members B1 to B4, respectively. Thereby, the fastening members B1 to B4 can be distinguished by confirming the marks M1 to M4.

  In addition, in this embodiment, as shown in FIG. 2, although the openings 11-14 are formed circularly, it does not restrict to this. That is, when the identification plate 10 is placed on the work W, the fastening member is positioned inside the opening of the identification plate 10, and a torque wrench connection to the fastening member is permitted between the fastening member and the opening. It is sufficient if space is formed. The shape of the openings 11 to 14 can be appropriately determined in consideration of this point.

  Further, in the present embodiment, the marks M1 to M4 are formed on the whole (entire circumference) of the outer edge of each of the openings 11 to 14, but the present invention is not limited to this. As described above, the marks M1 to M4 only need to be able to distinguish the fastening members B1 to B4 disposed inside the respective openings 11 to 14. For example, each mark is provided on a part of the outer edge of each of the openings 11 to 14 It can be formed.

  In the example shown in FIG. 3, the outer shape of the identification plate 10 matches the outer shape of the work W, but the present invention is not limited to this. That is, the outer shape of the identification plate 10 and the outer shape of the work W may be appropriately determined as long as the identification plate 10 can be placed on the work W. Moreover, in this embodiment, although the flat identification plate 10 is mounted in the workpiece | work W comprised by the plane, it does not restrict to this. The identification plate 10 may be placed along the surface of the workpiece W, and the identification plate 10 may be formed in a shape corresponding to the surface shape of the workpiece W.

  Next, the structure and functional configuration of the torque wrench will be described using FIGS. 4 to 6. 4 shows the appearance of the torque wrench 20, and FIG. 5 shows the side of the head 22 of the torque wrench 20. As shown in FIG.

  The torque wrench 20 has a grip portion 21 provided at one end in the longitudinal direction and a head portion 22 provided at the other end in the longitudinal direction. The grip portion 21 is held by a worker who performs a tightening operation of the fastening members B1 to B4. At the center of the torque wrench 20 in the longitudinal direction, a display unit 23 for displaying various types of information is provided.

  The head unit 22 is provided with an angular drive 22a to which a socket (not shown) or the like is connected and an imaging unit 22b. When the socket connected to the corner drive 22a is connected to each of the fastening members B1 to B4, the imaging unit 22b captures an image of the connection portion of the socket and each of the fastening members B1 to B4. Since the imaging unit 22b is disposed at a distance from the angular drive 22a, as shown in FIG. 5, the imaging direction D of the imaging unit 22b is with respect to the longitudinal direction of the torque wrench 20 (horizontal direction in FIG. 5). It is inclined.

  As an internal structure of the torque wrench 20, a known structure provided with a toggle mechanism or the like can be adopted. In the torque wrench 20, when the tightening torque of the fastening members B1 to B4 reaches the set torque, the limit mechanism is turned on by operating the toggle mechanism. By confirming that the limit switch is on, it can be determined that the tightening operation for each of the fastening members B1 to B4 is completed.

  On the other hand, depending on the type of torque wrench 20, when the tightening torque value of the fastening members B1 to B4 reaches the set torque value, the vibration is transmitted to the hand of the operator due to the collision of the components of the torque wrench 20 , Sound is generated. The operator can grasp the completion of the tightening operation based on the vibration and the sound. The operator who has grasped the completion of the tightening operation can input information indicating the completion of the tightening operation to the torque wrench 20. For example, the operator inputs information indicating the completion of the tightening operation to the torque wrench 20 by touching a button displayed on the display unit 23 or pressing a mechanical button provided on the torque wrench 20. (Operation input) can be performed.

  In the present embodiment, the head unit 22 and the imaging unit 22b are integrally formed, but the imaging unit 22b may be detachable from the head unit 22. Further, in the present embodiment, the imaging unit 22 b is provided in the head unit 22, but the imaging unit 22 b may be provided in a portion other than the head unit 22 in the torque wrench 20. As described above, the imaging unit 22b only needs to be able to image the connection portion of the socket and the fastening members B1 to B4.

  In FIG. 6, the control unit 24 controls the imaging unit 22b. Specifically, the control unit 24 images the connection portion of the socket and the fastening members B1 to B4 by driving the imaging unit 22b. In the present embodiment, the angle of view of the imaging unit 22 b is fixed, and the area of the image captured by the imaging unit 22 b is constant. As described later, it is preferable to set the angle of view of the imaging unit 22b so that only one of the marks M1 to M4 is included in the captured image in managing the tightening operation on the fastening members B1 to B4 .

  Note that the angle of view of the imaging unit 22b can also be changed. In this case, the angle of view of the imaging unit 22b can be adjusted so that only one of the marks M1 to M4 is included in the image captured by the imaging unit 22b. Here, if the angle of view is too wide, a plurality of marks of the marks M1 to M4 are included in the captured image, which is not preferable in managing the tightening operation described later. If the angle of view is too narrow, all the marks M1 to M4 will not be included in the captured image, which is not preferable in managing the tightening operation described later. In consideration of these points, it is possible to determine in advance the limit value for widening the angle of view and the limit value for narrowing the angle of view.

  FIG. 7 shows a captured image (one example) I obtained by the imaging of the imaging unit 22b. 7, the socket 26 connected to the corner drive 22a of the torque wrench 20 is connected to the fastening member B3, and in the captured image I, the opening 13 of the identification plate 10 and the mark M3 and the tip of the socket 26 And are included.

  When the fastening member B3 is tightened, the torque wrench 20 pivots about the socket 26. At this time, although the imaging unit 22b moves around the rotation axis of the torque wrench 20, since imaging is performed in the imaging direction D shown in FIG. 5 as described above, regardless of the rotation position of the torque wrench 20. The captured image of the imaging unit 22 b includes the opening 13 of the identification plate 10 and the mark M 3, and the tip of the socket 26.

  The control unit 24 can determine that the fastening operation on the fastening member B3 is being performed based on the mark M3 included in the captured image I of the imaging unit 22b. When fastening the fastening members B1 to B4, since the order of the fastening work is determined in advance, imaging is performed by the imaging unit 22b each time the fastening work is performed, based on these captured images I in advance. It can be determined whether or not the tightening operation is performed in a predetermined order. Here, the memory 25 shown in FIG. 6 stores information indicating the order of the tightening operation. Specifically, the order of the colors of the marks M1 to M4 is specified as the order of the tightening operation.

  On the other hand, the control unit 24 causes the display unit 23 to display various types of information by driving the display unit 23. FIG. 8 shows a screen (an example) displayed on the display unit 23.

  In FIG. 8, an image of the identification plate 10 placed on the work W is displayed in the display area 23 a. The image may be any image that allows the operator of the torque wrench 20 to recognize the identification plate 10 placed on the work W. This image may be, for example, an image obtained by imaging the identification plate 10 placed on the workpiece W in advance by the imaging unit 22 b, or may be a figure representing the identification plate 10 placed on the workpiece W .

  In the display area 23a, a mark M11 representing a part of the head portion 22 and a triangular mark M12 displayed together with the mark M11 are displayed. The marks M11 and M12 are displayed superimposed on the image of the identification plate 10 placed on the workpiece W. The marks M11 and M12 indicate the fastening member B1 to be tightened, and the operator of the torque wrench 20 grasps the fastening member to be tightened by confirming the marks M11 and M12. be able to.

  In the display area 23a, the mark M13 is displayed superimposed on the image of the identification plate 10 placed on the workpiece W. The mark M13 indicates that the tightening operation is completed, and in the example shown in FIG. 8, it is displayed at a position corresponding to the fastening members B3 and B4 for which the tightening operation is completed. The operator of the torque wrench 20 can grasp the fastening member for which the tightening operation has been completed by confirming the mark M13.

  On the other hand, display areas 23 b to 23 d are provided on the display screen of the display unit 23. Information on the type of the work W is displayed on the display area 23b, and information on the type of the torque wrench 20 used for the tightening operation is displayed on the display area 23c. The operator of the torque wrench 20 can grasp the types of the work W and the torque wrench 20 by confirming the display contents of the display areas 23 b and 23 c.

  The upper limit value and the lower limit value for specifying the allowable range of the tightening torque value when tightening the fastening members B1 to B4 are displayed in the display area 23d. The operator of the torque wrench 20 can confirm the display content of the display area 23 d and perform the tightening operation.

  In addition, the torque wrench 20 can be provided with a speaker that outputs predetermined information as sound. For example, the information displayed on the display unit 23 or the information attached to the information can be output as a voice from the speaker. The drive of the speaker can be controlled by the control unit 24.

  Next, the process of the control unit 24 when the fastening members B1 to B4 are tightened will be described with reference to the flowcharts shown in FIGS. Here, the memory 25 stores the order of the mark M1, the mark M3, the mark M2, and the mark M4 as the order of the tightening operation. In addition, the identification plate 10 is placed on the work W before the fastening members B1 to B4 are tightened.

  In step S101, the control unit 24 drives the imaging unit 22b to acquire a captured image I indicating a connection portion of the socket 26 and the fastening member B1. In step S102, the control unit 24 determines whether the mark M1 is included in the captured image I acquired in the process of step S101. Whether or not the mark included in the captured image I is the mark M1 can be determined based on the color of the mark M1.

  If the mark M1 is not included in the captured image I, the control unit 24 notifies and warns the operator of the torque wrench 20 of information indicating that the order of the tightening operation is incorrect in step S103. As a notification method to the worker, for example, when the notification content (warning content) is displayed on the display unit 23 or the speaker is provided in the torque wrench 20, the notification content (warning content) is output from the speaker as a voice You can do it. The worker who has received the warning can recognize that the order of the tightening operation is incorrect, and the socket 26 can be reconnected to the fastening member B1 to perform the original tightening operation to restart the tightening operation. .

  If the mark M1 is included in the captured image I, the control unit 24 determines in step S104 whether or not the tightening operation of the fastening member B1 is completed. Here, the control unit 24 stands by until the tightening operation of the fastening member B1 is completed. As described above, the determination as to whether or not the tightening operation has been completed is performed based on the output signal of the limit switch associated with the completion of the tightening operation, or the signal of the operator's operation input associated with the completion of the tightening operation. It can be done based on

  When the tightening operation of the fastening member B1 is completed, the control unit 24 superimposes and displays the mark M13 on the mark M1 in the display area 23a of the display unit 23 in step S105. Then, the control unit 24 proceeds to the process after step S106.

  In step S106, the control unit 24 drives the imaging unit 22b to acquire a captured image I indicating a connection portion of the socket 26 and the fastening member B3. In step S107, the control unit 24 determines whether the mark M3 is included in the captured image I acquired in the process of step S106. Whether or not the mark included in the captured image I is the mark M3 can be determined based on the color of the mark M3.

  If the mark M3 is not included in the captured image I, the control unit 24 notifies and warns the operator of the torque wrench 20 of information indicating that the order of the tightening operation is incorrect in step S108. The worker who has received the warning can recognize that the order of the tightening operation is incorrect, and the socket 26 can be reconnected to the fastening member B3 to perform the original tightening operation, and the tightening operation can be resumed. . When the mark M3 is included in the captured image I, in step S109, the control unit 24 determines whether or not the tightening operation of the fastening member B3 is completed. Here, the control unit 24 stands by until the tightening operation of the fastening member B3 is completed.

  When the tightening operation of the fastening member B3 is completed, the control unit 24 superimposes and displays the mark M13 on the mark M3 in the display area 23a of the display unit 23 in step S110. Then, the control unit 24 proceeds to the process after step S111.

  In step S111, the control unit 24 drives the imaging unit 22b to acquire a captured image I indicating a connection portion of the socket 26 and the fastening member B2. In step S112, the control unit 24 determines whether the mark M2 is included in the captured image I acquired in the process of step S111. Whether or not the mark included in the captured image I is the mark M2 can be determined based on the color of the mark M2.

  If the mark M2 is not included in the captured image I, the control unit 24 notifies and warns the operator of the torque wrench 20 of information indicating that the order of the tightening operation is incorrect in step S113. The worker who has received the warning can recognize that the order of the tightening operation is incorrect, and the socket 26 can be reconnected to the fastening member B2 to perform the original tightening operation to restart the tightening operation. . If the mark M2 is included in the captured image I, the control unit 24 determines in step S114 whether the tightening operation of the fastening member B2 is completed. Here, the control unit 24 stands by until the tightening operation of the fastening member B2 is completed.

  When the tightening operation of the fastening member B2 is completed, in step S115, the control unit 24 superimposes and displays the mark M13 on the mark M2 in the display area 23a of the display unit 23. Then, the control unit 24 proceeds to the process after step S116.

  In step S116, the control unit 24 drives the imaging unit 22b to acquire a captured image I indicating the connection portion of the socket 26 and the fastening member B4. In step S117, the control unit 24 determines whether the mark M4 is included in the captured image I acquired in the process of step S116. Whether or not the mark included in the captured image I is the mark M4 can be determined based on the color of the mark M4.

  If the mark M4 is not included in the captured image I, the control unit 24 notifies and warns the operator of the torque wrench 20 of information indicating that the order of the tightening operation is incorrect in step S118. The worker who has received the warning can recognize that the order of the tightening operation is incorrect, and the socket 26 can be reconnected to the fastening member B4 to perform the original tightening operation to restart the tightening operation. . If the mark M4 is included in the captured image I, the control unit 24 determines in step S119 whether or not the tightening operation of the fastening member B4 is completed. Here, the control unit 24 stands by until the tightening operation of the fastening member B4 is completed.

  When the tightening operation of the fastening member B4 is completed, the control unit 24 superimposes and displays the mark M13 on the mark M4 in the display area 23a of the display unit 23 in step S120.

  By performing the process described above, all the fastening members B1 to B4 can be tightened in a predetermined order. In addition, when all the fastening members B1 to B4 are normally tightened, the mark M13 is displayed overlapping the all marks M1 to M4 in the display area 23a of the display unit 23. The operator can grasp that all the fastening members B1 to B4 are tightened in a predetermined order by confirming the display area 23a. Thereby, it is possible to prevent the tightening member from being tightened.

  In the present embodiment, the information indicating the order of the tightening operation is stored in the memory 25 of the torque wrench 20, but the present invention is not limited to this. For example, in a memory of an external device installed outside the torque wrench 20, information indicating the order of tightening operations can be stored. When managing the tightening operation, the torque wrench 20 can communicate with an external device via wire or wireless.

  Here, management of the tightening operation may be performed by the control unit 24 of the torque wrench 20, or may be performed by a control unit provided in an external device. When the control unit 24 of the torque wrench 20 manages the tightening operation, the torque wrench 20 may obtain information indicating the order of the tightening operation from the external device. When the control unit of the external device manages the tightening operation, a captured image of the imaging unit 22b and information indicating the completion of the tightening operation may be transmitted from the torque wrench 20 to the external device.

  According to the present embodiment, by using the identification plate 10, it is possible to manage the order of the tightening operation on the fastening members B1 to B4. Since the identification plate 10 is only placed on the work W, one identification plate 10 can be used for a plurality of works W. That is, after completing the tightening operation of the fastening members B1 to B4 for one work W, if the identification plate 10 is removed from the work W and placed on another work W, the fastening members B1 to B4 for the other work W Can be performed.

10: Identification plate, 11 to 14: Opening, 20: Torque wrench, 21: Grip,
22: head unit, 22a: angular drive, 22b: imaging unit, 23: display unit, 24: control unit,
25: Memory, W: Work, B1 to B4: Fastening member, M1 to M4: Mark,
M11 to M13: Mark

Claims (4)

An identification plate mounted on a work on which a plurality of fastening members are to be tightened and identifying the tightening operations for the plurality of fastening members,
A plurality of openings formed corresponding to each of the plurality of fastening members, and allowing connection of a torque wrench to the fastening members when placed on the work;
A plurality of marks formed on the outer surface of the identification plate along the edges of the openings and having different visual elements;
An identification plate characterized by having:   The identification plate according to claim 1, wherein the visual element is at least one of a color, a shape and a pattern. A torque wrench used in a state in which an identification plate for identifying a tightening operation for the plurality of fastening members is placed on a work on which the tightening operation of the plurality of fastening members is performed,
The identification plate is
A plurality of openings formed corresponding to each of the plurality of fastening members, and allowing connection of a torque wrench to the fastening members when placed on the work;
And a plurality of marks formed on the outer surface of the identification plate along the edges of the openings and having different visual elements.
The torque wrench is
An imaging unit configured to image a connection portion with the fastening member;
A fastening member in which the fastening member which is being tightened by the torque wrench is specified based on a predetermined order of the tightening operation based on the mark included in the image picked up by the imaging unit And a control unit that determines whether or not
Torque wrench characterized by having. An identification plate according to claim 1 or 2;
And the torque wrench,
The torque wrench is
An imaging unit configured to image a connection portion with the fastening member;
A fastening member in which the fastening member which is being tightened by the torque wrench is specified based on a predetermined order of the tightening operation based on the mark included in the image picked up by the imaging unit And a control unit that determines whether or not
Torque wrench set characterized by having.