JP5836659B2 - Tightening work support device - Google Patents

Description

  The present invention relates to a tightening work support device that supports a tightening operation of tightening a tightening component with a tightening tool at a plurality of tightening positions formed on a workpiece in an assembly line of an automobile, for example.

  As is well known, for example, in an assembly line of an automobile, for example, an operation of tightening a tightening part such as a bolt with a tightening tool such as a torque wrench is performed in each of a plurality of holes formed in a work to be assembled. .

  In such a manual tightening operation, there is a possibility that an operation error such as forgetting to attach the tightening part may occur.

  To deal with this problem, for example, in Patent Document 1, a signal output from a torque wrench is counted every time a bolt is tightened, and the number of times of tightening per bolt is determined in advance. A tightening work support device is disclosed in which work is terminated when the number of times is multiplied by the number of bolts.

JP-A-9-85647

  However, in the device disclosed in Patent Document 1, for example, when a predetermined number of tightening times per bolt is one, one bolt is tightened when any bolt is tightened twice. Even if the tightening of the bolt is forgotten, there is a possibility that the situation will end.

  To solve this problem, the tightening operation is photographed with a camera, and it is detected that the part that fits the bolt of the torque wrench moves to a predetermined tightening position. A tightening work support device that terminates the work when a torque wrench is detected can be considered. However, in the case of such a device, in order to detect the torque wrench with high accuracy, it is necessary to make the image of the camera highly accurate. For this purpose, an expensive camera equipped with a lens with little aberration is used. Had to do.

  In view of the above circumstances, an object of the present invention is to improve the detection accuracy of a tightening tool while reducing the manufacturing cost of a support device for a tightening operation using a camera.

  The tightening work support device according to the present invention, which was created to solve the above problems, is a tightening work support device that supports the tightening work of tightening a tightening part with a tightening tool at a plurality of tightening positions of a workpiece. An identification mark provided on the clamping tool, a camera that captures a clamping work area of the workpiece and generates image data, and the identification mark is photographed by the camera before the clamping work. An identification data storage unit that acquires and stores identification data indicating the identification mark from the image data generated in the above, and before the tightening operation, the plurality of tightening positions of the camera image data before the tightening operation. A detection area setting unit for setting a detection area for detecting the identification data at a position corresponding to each of the detection data; and the identification data in each detection area in the image data of the camera during the fastening operation. Characterized in that a identification data determination unit that determines whether or not issued.

  With this configuration, the camera that captures the work area before the tightening work and the camera that captures the tightening work area during the tightening work are the same. For this reason, the image data before the tightening operation and the image data at the time of the tightening operation are substantially the same in distortion, blur, etc. caused by the aberration of the camera lens. Thereby, when the image data before and during the tightening operation are compared, image distortion due to aberration, blur, and the like are canceled out. The identification data of the identification mark is acquired from the image data before the tightening operation, and the target for detecting the identification data of the identification mark is the image data at the time of the tightening operation. Therefore, adverse effects due to the aberration of the camera lens are suppressed with respect to the accuracy of detecting the identification data of the identification mark during the tightening operation. Therefore, in this support device, it is possible to improve the detection accuracy of the tightening tool while reducing the manufacturing cost by using an inexpensive camera including a lens having a relatively large amount of aberration.

  In this configuration, the identification data is detected in the detection area during the tightening operation. That is, the detection area is limited to the detection area, not the entire image data generated by being captured by the camera. As a result, the detection processing time can be shortened, and the storage capacity necessary for detection can be reduced. This also makes it possible to reduce the manufacturing cost of the device that supports the tightening operation.

  Said structure WHEREIN: The said identification mark may be provided on the rotating shaft of the said clamping tool at the time of clamp | tightening the said fastening component.

  In the apparatus of the present invention, the identification mark identification data is detected for the detection region. Therefore, when the fastening part is tightened by the tightening tool, if the identification mark is away from the tightening position, the detection area must be widened. If the detection area is wide, the identification data of the identification mark may be detected even when the tightening part is not tightened by the tightening tool, so that the detection accuracy of the apparatus with respect to the tightening tool decreases.

  On the other hand, if the identification mark is provided on the rotating shaft of the tightening tool when tightening the tightening part as in this configuration, the identification mark is tightened when the tightening part is tightened by the tightening tool. Since it is located near the attachment position, the detection area can be reduced. Accordingly, it is possible to suppress detection of identification data of the identification mark when the tightening component is not tightened by the tightening tool, and the detection accuracy for the tightening tool of the apparatus is improved. In addition, the detection processing time can be shortened, and the storage capacity necessary for detection can be reduced. This also makes it possible to reduce the manufacturing cost of the device that supports the tightening operation.

  In the above configuration, the identification mark may have a circular outer shape, and the center of the circle may be on the rotation axis.

  With such a configuration, the image of the outer shape of the identification mark does not change even if the tightening tool is rotated when tightening the tightening component with the tightening tool. Therefore, even if the rotation position of the tightening tool in the image data before the tightening operation is different from the rotation position of the tightening tool in the image data at the time of the tightening operation, the identification data of the identification mark can be detected. For this reason, since the detection of the identification data of an identification mark becomes easy, the detection accuracy with respect to the clamping tool of an apparatus can be improved.

  In the above configuration, a color data storage unit that acquires and stores color data of the identification mark from image data generated by photographing the identification mark with the camera before the tightening operation; and the tightening A color data determination unit for determining whether the color data of the identification mark acquired from the image data of the camera and the color data of the identification mark stored in the color data storage unit are the same during operation; You may have.

  In an apparatus having such a configuration, for example, if the color data of the identification mark acquired at the time of the tightening operation is different from the color data of the identification mark stored before the tightening operation, the tightening operation is regarded as defective. For example, as described below, it is possible to detect that the operator has made a mistake in the tightening tool in the tightening operation.

  A plurality of types of tightening tools are usually provided at the work site of the tightening work. In such a case, identification marks of different colors are provided on the respective tightening tools. Before the tightening operation, the color data of the identification mark of the tightening tool used for the tightening operation is stored in the color data storage unit of the support device. Next, this tightening operation is started. Then, when the operator uses a tightening tool different from the tightening tool to be used, the color data determination unit stores the color data of the identification mark acquired from the image data of the camera and the color data storage unit. It is determined that the color data of the identification mark is different. Therefore, this tightening operation is regarded as defective by the support device. Thus, it is possible to detect that the operator has made a mistake in the tightening tool during the tightening operation.

  In the above configuration, the identification mark may be formed of a plurality of colors, and the periphery of each color may be a concentric circular shape.

  In the apparatus having such a configuration, since the identification marks are composed of a plurality of colors, it is possible to increase the number of identification marks having the same outer shape that can be distinguished by colors. In addition, since the circumference of each color of the identification mark is a concentric circular shape, the outer shape of the identification mark is a circular shape, the outer shape of the identification mark is a circular shape, and the center of this circle is on the rotation axis For the same reason, it is possible to improve the detection accuracy for the fastening tool of the apparatus.

  ADVANTAGE OF THE INVENTION According to this invention, about the assistance apparatus of the fastening operation | work which uses a camera, the detection precision of a fastening tool can be improved, reducing manufacturing cost.

1 is a schematic side view showing a tightening work support device according to an embodiment of the present invention. It is a schematic plan view of a workpiece. It is a figure which shows the torque wrench which concerns on embodiment of this invention, (A) is a top view, (B) is a side view, (C) is a principal part enlarged plan view. It is a top view which shows the modification of the identification mark which concerns on embodiment of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic side view showing a tightening work support device according to an embodiment of the present invention. This tightening work support device 1 supports the tightening work. More specifically, the support device 1 detects an operation error in the tightening operation. This tightening operation is performed by rotating and tightening a tightening component (not shown) with a tightening tool in each of the plurality of holes 2a formed in the workpiece 2 illustrated in FIG. Therefore, the position of the hole 2a is a tightening position where the tightening component is tightened with the tightening tool. The fastening component is a bolt in this embodiment, but may be a screw or the like, for example. In this embodiment, the tightening tool is the torque wrench 3 illustrated in FIG. 3, but may be a driver, a spanner, an impact wrench, or the like.

  As shown in FIG. 1, the tightening work support device 1 includes a camera 4, a data processing unit 5, a data display unit 6 such as a monitor, and an identification mark 7 illustrated in FIG. 3 as main components.

  The camera 4 captures an area where the work 2 is tightened and generates image data. During the tightening operation, the camera 4 and the workpiece 2 do not move relative to each other. In the present embodiment, the camera 4 is fixed above the work 2 and photographs an area including the entire work 2.

  The workpiece 2 is positioned and arranged at a predetermined position on the work table 8. The work table 8 is provided with a moving mechanism (not shown) for moving the work table 8 between work areas along a fixed route, whereby the work table 8 can be moved and tightening work can be performed. It is possible to stop at a predetermined position for performing. Moreover, as shown in FIG. 2, the workpiece 2 has a hole 2a to which a bolt is attached formed on the upper surface.

  The data processing means 5 is, for example, a computer or the like, but may have a separate electronic device connected to it as necessary. The data processing means 5 includes an identification data storage unit 5a, a detection area setting unit 5b, and an identification data determination unit 5c. As will be described in detail later, the identification data storage unit 5a acquires and stores identification data indicating the identification mark 7 from image data generated by photographing the identification mark 7 with the camera 4 before the tightening operation. The detection area setting unit 5b sets a detection area R for detecting identification data at a position corresponding to each position of the hole 2a with respect to the image data before the tightening operation. The identification data determination unit 5c determines whether or not identification data is detected in each detection region R in the image data during the tightening operation.

  A camera 4 is connected to the data processing means 5, and image data photographed by the camera 4 is sent. The data processing means 5 is connected to input means (not shown) such as a mouse and a keyboard for instructing the data processing means 5 and inputting data. Further, the data processing means 5 is connected to the data display means 6, and the data processing means 5 displays the image data of the camera 4 and various data on the data display means 6. Furthermore, informing means (not shown) such as a buzzer or a lamp is connected to the data processing means 5 in order to notify the operator of the abnormality.

  As shown in an enlarged view in FIG. 3C, the identification mark 7 is provided on the torque wrench 3. In the present embodiment, the identification mark 7 is made of paper and is affixed to the surface of the torque wrench 3 opposite to the corner drive 3a. In the present embodiment, the identification mark 7 has a circular outer shape and a single red color. When performing the tightening operation, the torque wrench 3 is used by attaching a predetermined socket fitted to the head of the bolt to the corner drive 3a and grasping the grip portion 3b. When tightening the bolt, the torque wrench 3 rotates around the rotation axis O together with the bolt, but the center of the identification mark 7 is above the rotation axis O of the torque wrench 3.

  About the assistance apparatus 1 comprised as mentioned above, the operation | movement and usage method are demonstrated below along the operation | work in a work site.

  At the work site, the setting operation of the support device 1 by the administrator is performed, and then the bolt tightening operation to the workpiece 2 by the operator is performed.

  First, the setting operation of the support device 1 by the administrator will be described.

  First, when the administrator activates the support apparatus 1, image data captured by the camera 4 is sent to the data processing unit 5 and displayed on the data display unit 6. Transmission and display of the image data photographed by the camera 4 are continuously performed until the support device 1 is stopped.

  Next, the administrator instructs the data processing means 5 via the input means to put the data processing means 5 into a setting state. The work 2 is disposed at the same position as that during the tightening operation with respect to the camera 4 via the work table 8. Next, the administrator inputs design data on the position of the hole 2 a in the work 2. Further, the administrator inputs a parameter for determining the size of the detection region R in accordance with the desired detection accuracy. As shown in FIG. 2, the detection region R includes one hole 2 a of each workpiece 2 in the image data of the camera 4.

  Then, the detection area setting unit 5b of the data processing unit 5 calculates the position and size of the detection area R and sets the detection area R. Further, the data processing means 5 causes the data display means 6 to display a frame indicating the detection region R. The frame of the detection region R is, for example, yellow.

  At the time of setting the detection area R, the position of the detection area R depends on the position of the work 2 on the image data detected by the data processing means 5 from the image data of the camera 4 and the hole 2a in the input work 2. It is automatically calculated from the position design data by the detection area setting unit 5b of the data processing means 5. The size of the detection region R is automatically calculated by the detection region setting unit 5b of the data processing means 5 from the input parameter that determines the size of the detection region. In the present embodiment, the detection region R is a square, and the center of each detection region R coincides with the center of each hole 2a. The detection area R of the data processing unit 5 is given an identification number such as a serial number for identification by the detection area setting unit 5b, and is used for various data processing. 6 may be displayed.

  Next, the administrator attaches a socket to the torque wrench 3 to which the identification mark 7 is pasted, and the bolt 2 is tightened to the workpiece 2 by the torque wrench 3. Then, after the manager tightens the bolt in the hole 2a of the work 2, the torque wrench 3 is kept in the state of being fitted to the head of the bolt.

  Then, the administrator refers to the range including the identification mark 7 in the image data via the input means while referring to the image data displayed on the data display means 6 from the image data of the still image taken by the camera 4. By designating, the image data of the identification mark 7 is designated. As a result, the identification data storage unit 5a of the data processing means 5 acquires and stores identification data indicating the identification mark 7 from the image data.

  Here, the identification data may be the image data itself of the identification mark 7, or the density change curve obtained based on the image data, not the image data of the identification mark 7, or the inflection point. Data indicating characteristics of the identification mark 7 such as a position may be used. Further, the image data of the identification mark 7 may be only an image of the identification mark 7 or may include image data around the identification mark 7.

  In the present embodiment, the image data when the bolt is tightened is specified in the image data of the identification mark 7, but this specified image data is not the one when the bolt is tightened, 4 may be image data including the identification mark 7 photographed in 4.

  The administrator designates the image data of the identification mark 7 when a bolt is tightened in each hole 2a of the workpiece 2. When the designation of the image data of the identification mark 7 is completed for all the holes 2a of the workpiece 2, the image data of the identification mark 7 that is used as a template matching template to be described later is detected for each detection region R. select. In the present embodiment, for each detection region R, image data of the identification mark 7 designated when the bolt is tightened in the hole 2a included in the detection region R is selected. However, the present invention is not limited to this. For example, the image data of one identification mark 7 may be selected for all the detection regions R. The data processing means 5 stores which image data is selected for each detection region R.

  When the administrator finishes selecting the image data of the identification mark 7 for all the detection regions R, the administrator thereafter releases the setting state of the data processing means 5. This completes the setting work of the support device 1 by the administrator.

  Next, the bolt tightening work to the work 2 by the operator will be described. Here, it is assumed that the support device 1 remains activated after the setting work by the administrator. In the present embodiment, the number of tightening times by the torque wrench 3 for one bolt is one.

  First, an operator sets the data processing means 5 to a state for assisting tightening work through the input means. Then, the operator instructs the data processing means 5 to start support through the input means. Then, in a state where the work 2 to be tightened is fixed to the work table 8, the work table 8 is moved by a moving mechanism (not shown) and stops at a predetermined position. Also at this time, the data processing means 5 displays the image of the workpiece 2 and the frame of the detection area R on the data display means 6 as shown in FIG. The color of this frame is, for example, yellow.

  Thereafter, an operator sequentially performs bolt tightening work on each hole 2a of the workpiece 2 by using a torque wrench 3 fitted with a socket.

  When instructed to start support, the data processing means 5 performs the following operation. The identification data judgment unit 5c of the data processing means 5 uses the identification data of the identification mark 7 selected for the detection area R as a template for each detection area R in the image data photographed by the camera 4. Perform template matching. Thereby, the identification data determination unit 5c determines whether or not the identification data of the identification mark 7 is detected in each detection region R. When the identification data is detected in the detection area R, the data processing means 5 stores the detection area R. At this time, the data processing unit 5 changes the color of the frame of the detected detection area R displayed on the data display unit 6 to, for example, green.

  If the detection region R in which the identification data is detected is the detection region R in which the identification data has already been detected, the so-called twice that the bolt that has been tightened once in the hole 2a of the detection region R is tightened again. It is thought that it is tightening. Therefore, in this case, the data processing means 5 displays “Tighten bolts twice” on the data display means 6 and activates the notification means. Further, the data processing unit 5 changes the color of the frame of the corresponding detection region R displayed on the data display unit 6 to, for example, red. In this case, the operator confirms the detection area R that is a red frame on the data display means 6. And since the bolt fastened by the hole 2a of the detection area | region R has been tightened too much, an operator loosens the bolt once and tightens again. Then, the operator deletes the display of “Tighten bolts twice” from the data display means 6, stops the notification means, and sets the corresponding detection region R frame color to green. To instruct. Thereafter, the worker resumes the tightening operation.

  Further, the data processing means 5 determines whether or not identification data has been detected in all the detection regions R. If the data processing means 5 determines that the identification data has been detected in all the detection areas R, it is considered that the tightening operation has been completed. Therefore, the data processing means 5 operates the moving mechanism of the work table 8 to move the work 2 for which the tightening work has been completed to the next area for another work, and to move the new work 2 to this area. Move to the tightening work area.

  On the other hand, if the data processing unit 5 determines that identification data has not been detected in all the detection regions R, whether or not identification data is newly detected in the detection region R within a predetermined time is determined. to decide.

  If the identification data is newly detected in the detection region R within the predetermined time, it is considered that the tightening operation has been continuously performed by the operator. Therefore, again, as described above, the data processing means 5 determines whether or not the identification data is detected in all the detection regions R.

  On the other hand, if the identification data is not newly detected in the detection region R and a predetermined time elapses, it is considered that the bolt is forgotten to be attached. Therefore, in this case, the data processing means 5 displays “Forget to install the bolt” on the data display means 6 and activates the notification means. In this case, the operator confirms the detection area R of the yellow frame on the data display means 6, and attaches and tightens a bolt in the hole 2a corresponding to the detection area R. Then, the operator instructs the data processing means 5 to erase the display of “forgetting to install bolts” from the data display means 6 and stop the notifying means. Then, again, as described above, the data processing unit 5 determines whether or not the identification data is detected in all the detection regions R.

  Further, the identification data is not newly detected in the detection region R, and the worker himself / herself notices that the tightening of all the holes 2a is not completed because the workpiece 2 is not moved within a predetermined time. There is a case. Also in this case, the operator confirms the detection area R of the yellow frame with the data display means 6, and attaches and tightens the bolt in the hole 2a corresponding to the detection area R. This case corresponds to a case where identification data is newly detected in the detection region R within the predetermined time described above.

  When one tightening operation is completed and a new work 2 is moved to the tightening operation area and stopped, the operator instructs the data processing means 5 to start support via the input means. Then, the data processing means 5 initializes the data of the detection area R identified during the previous mounting operation, and returns the color of the frame of the detection area R displayed on the screen display means to yellow.

  Thereafter, the worker starts a new tightening operation. Thereafter, the operator repeats the work of tightening the workpiece 2 in the same manner.

  After the tightening work for all the workpieces 2 is completed, the worker instructs the data processing means 5 to release the data processing means 5 from the state for supporting the tightening work, and stops the support device 1.

  The support device 1 configured as described above can enjoy the following effects.

  In the support device 1, the camera 4 that captures the work area before the tightening work and the camera 4 that captures the tightening work area during the tightening work are the same. For this reason, the image data before the tightening operation and the image data at the time of the tightening operation are substantially the same in distortion, blur, etc. caused by the aberration of the lens of the camera 4. For example, when the outer shape of the identification mark 7 becomes elliptical in the image data before the tightening operation due to the aberration of the lens of the camera 4, the outer shape of the identification mark 7 due to the aberration of the lens of the camera 4 even in the image data during the tightening operation. Becomes a similar ellipse. For this reason, when image data before and during the tightening operation are compared, image distortion, blur, and the like due to aberration are canceled out. The identification data of the identification mark 7 used as a template for template matching is acquired from the image data before the tightening operation, and the detection target by the template matching is the image data at the time of the tightening operation. Therefore, adverse effects due to the aberration of the lens of the camera 4 are suppressed with respect to the accuracy of detecting the identification data of the identification mark 7 by template matching during the tightening operation. Therefore, in this support apparatus 1, it is possible to improve the detection accuracy of the torque wrench 3 while reducing the manufacturing cost by using an inexpensive camera 4 provided with a lens having a relatively large amount of aberration.

  In the above embodiment, the workpiece 2 is automatically moved together with the work table 8. However, for example, when the work table 8 does not move and the work 2 on the work table 8 is exchanged manually, the support of the above embodiment is performed. In the operation of the apparatus 1, the following situation may occur. That is, when the support device 1 detects “forgetting to attach the bolt”, the operator has already manually replaced the workpiece 2, and the workpiece for which the bolt has been forgotten to be attached is returned to the work table 8. Can occur. This is because it is determined whether or not the identification data of the identification mark 7 is newly detected in the detection region R within a predetermined time, so that it is determined that the operator has finished the tightening operation within the predetermined time. This is because the workpiece 2 is manually replaced. In order to solve such a problem, for example, when the operator himself / herself determines that the tightening operation of the workpiece 2 has been completed, the determination as to whether the identification data has been detected in all the detection regions R is performed. This may be done by instructing the data processing means 5. In this way, since it is possible to detect “forgot to install the bolt” only by determining whether or not the identification data is detected in all the detection regions R, the identification data is newly detected in the detection region R within a predetermined time. Since it is not necessary to determine whether or not to be performed, the above-described problem does not occur.

  In the support device 1 of the above-described embodiment, only the double tightening of the bolt and the forgetting to attach the bolt are detected, but other operation mistakes can also be detected.

  For example, if the following is performed, it can be detected that the tightening order is wrong. First, during the setting operation, the data processing means 5 is made to store the tightening order of the bolts of the work 2. Then, during the tightening operation, the order in which the identification data is detected in the detection region R is detected, and the data processing means 5 is made to determine whether or not it is the same as the stored tightening order. If it is different from the stored tightening order, the data processing means 5 displays on the data display means 6 that “the wrong tightening order” and activates the notifying means.

  In the above embodiment, the identification mark 7 has a circular outer shape and a single color, but the present invention is not limited to this. For example, the outer shape may be a square, a regular hexagon, or the like. However, it is preferable during the tightening operation because a circle having the same shape can be easily detected in the image of the camera 4 regardless of the direction of the torque wrench 3. Further, the identification mark 7 may be composed of a plurality of colors. For example, in the identification mark 7 shown in FIG. 4, the outer shape is a circular shape, which is composed of a plurality of colors indicated by different hatching, and the peripheral edges of the respective colors are concentric circular shapes. Thus, if the identification mark 7 is composed of a plurality of colors, it is difficult for a pattern with the same color as the identification mark to exist, so that another pattern or the like may be erroneously detected as the identification mark 7. Decreases. Thereby, the detection accuracy with respect to the torque wrench 3 of the assistance apparatus 1 can be improved.

  Further, the identification marks 7 can be distinguished even if they have the same outer shape by identifying colors by different colors. In particular, as illustrated in FIG. 4, when the identification mark 7 is composed of a plurality of colors, the number that can be distinguished with the same outer shape can be increased. Specific examples of the method for making this distinction include the following. First, as shown in Table 1, for example, colors and numbers (color codes) are associated with each other. As a result, the color codes corresponding to the respective colors of the identification mark 7 are arranged in a predetermined order to form an identification code unique to the identification mark 7. Then, the identification mark 7 is distinguished by the identification code. In this method, all of the numbers of one identification code are the same, that is, the identification mark 7 is distinguished as a single color.

  By multiplying the number of types of colors that can be used for the identification mark 7 having a predetermined outer shape by the number of times of the number of colors constituting one identification mark 7, the number by which the identification mark 7 can be distinguished by color can be calculated. . For example, in the case of an identification mark 7 composed of three colors as shown in FIG. 4, if 10 colors as shown in Table 1 can be used, the number of identification marks 7 that can be distinguished by color is 10 × 10 ×. 10 = 1000.

  If the identification mark 7 that can be identified by such a color is used, the types of detection by the support device 1 can be increased. For example, when a plurality of types of torque wrench 3 are arranged in the storage area, it is possible to detect whether or not the type of torque wrench 3 used in the tightening operation is correct. The support device 1 in this case will be described in detail below.

  In this case, the data processing unit 5 includes a color data storage unit and a color data determination unit in addition to the identification data storage unit 5a, the detection area setting unit 5b, and the identification data determination unit 5c. The color data storage unit acquires and stores the color data of the identification mark 7 from the image data generated by photographing the identification mark 7 with the camera 4 before the tightening operation. The color data determination unit determines whether the color data of the identification mark 7 acquired from the image data generated by the camera 4 and the color data of the identification mark 7 stored in the color data storage unit are the same during the tightening operation. Determine whether.

  In the setting operation of the support device 1 by the administrator, different identification marks 7 are pasted at the same positions as those in the above-described embodiment when each of the plurality of types of torque wrench 3 arranged in the storage area is identified by color. In the setting operation, when the administrator designates the image data of the identification mark 7 in the same manner as in the above embodiment, the color data storage unit of the data processing unit 5 uses the identification mark 7 from the image data of the identification mark 7. 7 color data is obtained, and an identification code is created and stored using the color code.

  Then, in the tightening operation of the bolt to the work 2 by the operator, when the color data determination unit of the data processing means 5 detects the identification data of the identification mark 7 in any detection region R, the identification mark 7 color data is acquired, and an identification code is created using the color code. Then, the color data determination unit of the data processing means 5 determines whether or not the created identification code is the same as the identification code stored in the setting operation. When the identification codes are different, the data processing means 5 displays on the data display means 6 that the torque wrench 3 has been mistaken and activates the notifying means. As described above, it is possible to detect whether or not the type of the torque wrench 3 used for the tightening operation is correct.

  Further, as will be described below, if the support device 1 uses the hue to identify the identification mark 7, as in the case where the identification mark 7 is identified using the color described above, For example, it is possible to detect whether or not the type of torque wrench 3 used in the tightening operation is correct.

  By analyzing the hue of the color of the identification mark 7, for example, the support apparatus 1 is provided with a function of calculating each content rate of CMYK obtained by adding black to the three primary colors. If the color of the identification mark 7 is different, each content rate of CMYK is different. Therefore, it becomes possible for the support apparatus 1 to identify the identification mark 7 by hue according to each content rate of CMYK. Similarly, the support device 1 can identify the identification mark 7 by the hue even if the content rates of the three primary colors RGB of light are used instead of the content rates of CMYK.

  The present invention can also be applied to support measurement work for a predetermined location on the workpiece 2 by using a caliper, a micrometer, or the like other than the tightening tool.

  The present invention is not limited to the above description, and various modifications are possible within the scope of the technical idea.

1 Work Support Device 2 Work 2a Hole 3 Torque Wrench (Tightening Tool)
4 Camera 5 Data processing means 5a Identification data storage section 5b Detection area setting section 5c Identification data judgment section 6 Data display means 7 Identification mark O Rotating axis R Detection area

Claims (5)

A tightening work support device for supporting a tightening work of tightening a tightening part with a tightening tool at a plurality of tightening positions of a workpiece,
An identification mark provided on the tightening tool;
A camera that shoots a tightening work area including the plurality of tightening positions of the workpiece and generates image data;
Before the tightening operation, an identification data storage unit that acquires and stores identification data indicating the identification mark from image data generated by photographing the identification mark with the camera;
Before working said clamping, the image data relative position is generated by photographing the working area tightening of the workpiece that is positioned so as to be constant in the camera relative to the camera, with the plurality of fastening to detect the pre-Symbol identification data at positions corresponding to the respective positions, the detection area setting unit for setting a dedicated detection region in each of the tightening position,
During the tightening operation, the identification data in the positioning has been in all of the detection region of the working area fastening set by the detection area setting unit in the image data generated by photographing by the camera of the workpiece A tightening work support device, comprising: an identification data determination unit that determines whether or not a mark is detected.   The tightening work support device according to claim 1, wherein the identification mark is provided on a rotating shaft of the tightening tool when the tightening component is tightened.   The tightening work support apparatus according to claim 2, wherein an outer shape of the identification mark is a circular shape, and a center of the circle is on the rotation shaft. Before the tightening operation, a color data storage unit that acquires and stores color data of the identification mark from image data generated by photographing the identification mark with the camera;
When working the tightening, the color data of the identification mark obtained from the image data generated by imaging the work area tightening of the workpiece by the camera, the identification mark that is stored in the color data storage unit The tightening work support apparatus according to claim 3, further comprising: a color data determination unit that determines whether or not the color data is the same.   The tightening work support device according to claim 4, wherein the identification mark is composed of a plurality of colors, and the periphery of each color is a concentric circular shape.

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