JP2012163364A - Torque measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque measuring device capable of easily performing an input work of rating information, etc., to a storage part of a torque sensor section at the manufacturing time, etc., of the torque measuring device.SOLUTION: A torque measuring device 1 includes a torque sensor section 4 fixed to a thread fastening device and capable of at least measuring a fastening torque of the thread fastening device, and also includes a control section 13 having a display 17 and a RAM 31 (first storage part) on which the rating information showing a performance of the torque sensor section 4 (information of torque sensor section) is stored, to process the measurement result measured in the torque sensor section 4 based on the rating information stored in the RAM 31 and display it on the display 17. The torque sensor section 4 comprises an EEPROM 9 (second storage part). The control section 13 comprises an operational input operation part 18 and is constituted so that the rating information, etc., (information of torque sensor section) are writable to the EEPROM 9 by operating the input operation part 18.

Description

  The present invention relates to a torque measuring device that is attached to a screw tightening machine such as a nut runner for tightening a nut to a workpiece and measures a tightening torque of the screw tightening machine.

  In Patent Document 1 below, a screw tightening machine includes a torque detection unit and an angle detection unit, and a control unit (control device) that controls the screw tightening machine processes detection signals from the torque detection unit and the angle detection unit. A technique for measuring a tightening torque and a tightening angle of a screw tightener and displaying a measurement result on a display unit as a torque time waveform or a torque angle waveform is described. A portion constituted by the torque detection unit and the angle detection unit is referred to as a torque sensor unit.

  A portable torque measuring device comprising a torque sensor unit having a torque detection unit and an angle detection unit, and a control unit for processing a detection signal from the torque sensor unit, wherein the torque sensor unit is used as a screw tightening machine. 2. Description of the Related Art Conventionally, a torque measuring device that is attached and measures a tightening torque of a screw tightener and displays the torque on a display unit is known.

  In order to accurately measure the tightening torque of a nut runner or the like using such a torque measuring device, an appropriate torque sensor unit is used for the nut runner to be measured, and the torque is measured based on the rating information of the torque sensor unit. The control unit of the measurement device needs to process the detection signal from the torque sensor unit. That is, in order for the control unit to correctly process the detection signal from the torque sensor unit, it is necessary for the control unit to recognize the rating information of the torque sensor unit. Therefore, a storage unit (ROM) is provided as a torque sensor unit used in such a torque measurement device, and the rating information of the torque sensor unit is stored in the storage unit, and the rating information of the torque sensor unit is stored from the storage unit. Something that can read out has appeared.

JP-A-6-155192

  However, in the torque measuring device as described above, since the control unit of the torque measuring device cannot write information to the storage unit provided in the torque sensor unit, at the time of manufacturing the torque sensor unit, the control unit of the torque measuring device. It is necessary to write the rating information and the like to the storage unit of the torque sensor unit using a writing device (ROM writer) other than the above, and the input work of the rating information and the like to the torque sensor unit is complicated.

  Therefore, in view of the above circumstances, the present invention has an object to provide a torque measurement device that can easily perform input work of rating information and the like to a storage unit of a torque sensor unit during manufacture of the torque measurement device. And

  The torque measuring device of the present invention includes a torque sensor unit that is attached to the screw tightening machine and can measure at least the tightening torque of the screw tightening machine, and includes a display unit and torque sensor unit information indicating the performance of the torque sensor unit. A first storage unit stored therein, and a control for processing the measurement result measured by the torque sensor unit based on the torque sensor unit information stored in the first storage unit and displaying it on the display unit In the torque measurement device including the unit, the torque sensor unit includes a second storage unit, the control unit includes an operable input operation unit, and the torque sensor unit is operated by operating the input operation unit. The information is configured to be writable in the second storage unit.

  According to the present invention, by operating the input operation unit of the control unit, the torque sensor unit information can be written in the storage unit (second storage unit) of the torque sensor unit. Therefore, without using a separate writing device (ROM writer), input of torque sensor unit information such as rating information to the storage unit (second storage unit) of the torque sensor unit at the time of manufacturing the torque measuring device or the like. Can be easily performed.

  Here, in the torque measurement device of the present invention, when the torque measurement device is in operation and the torque sensor unit information is stored in the second storage unit, the control unit stores the second storage unit. The torque sensor unit information stored in the unit can be read from the second storage unit and stored in the first storage unit.

  The torque measuring device processes the measurement result measured by the torque sensor unit based on the torque sensor unit information stored in the first storage unit. With such a configuration, the torque measuring device can be controlled during operation of the torque measuring device. Since the torque sensor unit information is read from the second storage unit and written to the first storage unit by the unit, the user of the torque measurement device inputs the torque sensor unit information to the first storage unit of the control unit by himself / herself There is no need.

  Furthermore, in the torque measurement device according to the present invention, the control unit reads a predetermined value when the torque measurement device is activated based on the torque sensor unit information read from the second storage unit and stored in the first storage unit. A calibration process can be performed.

  The torque measuring device cannot perform correct measurement unless calibration processing based on the torque sensor unit information of the torque sensor unit is performed. With such a configuration, the torque measuring device can be controlled during operation of the torque measuring device. Since the calibration process based on the torque sensor unit usage information read from the second storage unit and stored in the first storage unit is performed by the unit, there is a risk that measurement will be erroneously performed without performing the calibration process. This can be reduced.

  According to the present invention, by operating the input operation unit of the control unit, the torque sensor unit information can be written in the storage unit (second storage unit) of the torque sensor unit. Therefore, without using a separate writing device (ROM writer), input of torque sensor unit information such as rating information to the storage unit (second storage unit) of the torque sensor unit at the time of manufacturing the torque measuring device or the like. Can be easily performed.

It is a front view of the torque measuring device of one embodiment of the present invention. It is a top view of a control part (control device) with which the torque measuring device is provided. It is a bottom view of the control part. It is a left view of the control part. It is a block diagram which shows the structure of the torque measuring device. It is a figure which shows the measurement screen displayed on the display part of the torque measuring device. It is a figure which shows the main menu screen displayed on the display part. It is a figure which shows the waveform screen of the torque time characteristic displayed on the display part. It is a figure which shows the waveform screen of the torque angle characteristic displayed on the display part. It is a figure which shows the measurement setting screen displayed on the display part. It is a figure which shows the measurement setting screen (2nd measurement setting screen) displayed on the display part. It is a figure which shows the other setting screen displayed on the display part. It is a figure which shows the setting value writing screen displayed on the other setting screen shown in FIG. It is a figure which shows the system setting screen displayed on the display part. It is a figure which shows the calendar setting screen displayed on the display part. It is a figure which shows the EEPROM setting screen (at the time of writing prohibition) displayed on the display part. It is a figure which shows the EEPROM setting screen (at the time of write permission) displayed on the display part. It is a figure which shows the printer output screen displayed on the display part. It is a figure which shows the USB output screen displayed on the display part. It is a figure which shows the self-diagnosis screen displayed on the display part.

1. Structure of Torque Measuring Device A torque measuring device 1 according to an embodiment of the present invention will be described based on the drawings. As shown in FIG. 1, the torque measuring device 1 includes a control unit (control device) 13 and a torque sensor unit 4, and the control unit 13 and the torque sensor unit 4 are connected by a cable 3.

  The torque sensor unit 4 is attached to a tightening shaft (rotary shaft) of a screw tightening machine such as a nut runner (not shown), and measures a tightening torque or the like when the screw tightening machine such as the nut runner tightens a nut or the like on the workpiece. That is, the torque measuring device 1 measures the tightening torque together with the elapsed time and the tightening angle when a screw tightening machine such as a nut runner performs the screw tightening, and displays the measurement result as a numerical value or a graph. The screw tightening machine such as a nut runner is used to check whether it is operating normally according to the set tightening torque. In addition, the torque sensor part 4 is provided with the attachment which can be adjusted according to the kind of screwing machine so that it can attach to the fastening axis | shaft of various screwing machines.

  As shown in FIG. 5, the torque sensor unit 4 includes a torque detection unit 5, an angle detection unit 7, and an EEPROM 9 (corresponding to a second storage unit). The torque detection unit 5 includes a strain gauge, and outputs a detection signal indicating a tightening torque of a screw tightening machine such as a nut runner. The angle detection unit 7 includes a resolver and outputs a detection signal indicating a tightening angle of a screw tightening machine such as a nut runner.

  The EEPROM 9 is a memory that can electrically erase written information and can rewrite the information any number of times. The EEPROM 9 includes a rating information storage unit 10. The rating information storage unit 10 stores contents such as rating information in the torque sensor unit 4. Specifically, as shown in FIG. 16 to be described later, the type, serial number (number), rating, reserve, year, month, date, and hour of the torque sensor unit 4 are stored as rating information. Note that the rating information and the like correspond to torque sensor unit information.

  As shown in FIGS. 1, 2, 3, and 4, the control unit 13 is configured to incorporate an electrical component in a substantially rectangular parallelepiped housing 14. As shown in FIG. 1, a display unit 17 of a display 16 with a touch panel is arranged on the front surface of the control unit 13. The display 16 with a touch panel constitutes an input operation unit 18 to a control unit 30 (see FIG. 5) described later.

  As shown in FIG. 2, the connection connector 19 of the cable 3 connected to the torque sensor unit 4 is disposed on the plane (upper surface) of the control unit 13. A printer output connector 20 is disposed on the upper surface of the control unit 13. A power switch 21 is provided on the upper surface of the control unit 13 to switch on / off the power of the torque measuring device 1. The power switch 21 is in an OFF mode when not in use, an AC mode in which the AC adapter 43 is connected, used to charge an auxiliary power source (battery) 42 to be described later, The BAT / CHG mode when the torque measuring device 1 is driven is switched. In addition, on the upper surface of the control unit 13, a gripping unit 23 that is used when carrying the control unit 13 is provided.

  As shown in FIG. 3, a USB terminal 25 for connecting a USB memory 46 (see FIG. 5) is arranged on the bottom surface (lower surface) of the control unit 13. As shown in FIG. 4, an AC adapter input connector 26 for connecting an AC adapter 43 is disposed on the left side surface of the control unit 13. The rated value of the AC adapter 43 to be used is 15V (volts) and 3A (amperes). Further, on the left side surface of the control unit 13, a hook fitting 27 is arranged for passing a portable belt when carrying the torque measuring device 1.

2. Electric System of Torque Measuring Device FIG. 5 is a block diagram of the electric system of the torque measuring device 1. The torque measuring device 1 includes a torque sensor unit 4 and a control unit 13. As described above, the torque sensor unit 4 includes the EEPROM 9 having the rating information storage unit 10, the torque detection unit 5, and the angle detection unit 7.

  The control unit 13 includes a control unit 30. The control unit 30 is configured by a so-called one-chip microcomputer including a CPU, a ROM, and a RAM (corresponding to a first storage unit) 31. The ROM stores a program for operating the torque measuring device 1. The tightening torque (information measured as a voltage value) detected by the torque detection unit 5 is amplified by an amplification circuit 34 arranged in the control unit 13 and then converted into a digital signal by an AD conversion circuit 35. Input to the control unit 30. Further, the tightening angle (information measured as a voltage value) detected by the angle detection unit 7 is converted into a digital signal by an angle information conversion circuit 37 disposed in the control unit 13 and input to the control unit 30. Is done. The tightening torque and the tightening angle input to the control unit 30 are stored in the RAM 31 included in the control unit 30. The EEPROM 9 of the torque sensor unit 4 is connected to the control unit 30 so that the control unit 30 can read and write information. For example, the rating information storage unit 10 in the EEPROM 9 stores the rating information of the torque sensor unit 4. In order to accurately analyze the tightening torque or the like by the torque measuring device 1, the torque sensor unit 4 Where it is necessary to analyze the values detected by the torque detection unit 5 and the angle detection unit 7 based on the rating information, in the embodiment, the control unit 30 stores the rating information stored in the rating information storage unit 10 in the EEPROM 9. Is automatically read when the power is turned on and stored in the RAM 31. Therefore, in the torque measurement device 1 of the embodiment, the user of the torque measurement device 1 operates the input operation unit 18 of the control unit 13 and inputs the rating information of the torque sensor unit 4 to the RAM 31 of the control unit 30. There is no need.

  The control unit 13 includes a display 16 with a touch panel. The display 16 with a touch panel serves as an input / output device for the control unit 30. The display 16 with a touch panel can input a command to the control unit 30 by touching a button image (for example, reference numeral 50 in FIG. 6) displayed on the display unit 17 (see FIG. 1). Thus, the display 16 with a touch panel is an input operation unit 18 to the control unit 30. In addition, as will be described later, the display 16 with a touch panel has a tightening torque (unit: Nm (Newton meter)) and a tightening angle (unit: Nm (Newton meter)) detected by the torque detection unit 5 and the angle detection unit 7 and processed by the control unit 30. A value regarding the unit (deg (degree)) is displayed on the display unit 17 as a numerical value or as a waveform image. The display 16 with a touch panel is connected to the control unit 30 via a display controller 39 that mainly controls the display unit 17 and to the control unit 30 via a touch panel controller 40 that mainly controls the input operation unit 18. It is connected.

  The control unit 13 includes a power supply circuit 41. The power supply circuit 41 converts the power supplied to the torque measuring device 1 via the AC adapter 43 into a voltage and current suitable for driving each part and supplies the converted voltage and current to each part. The power supply circuit 41 is connected to the control unit 30, the AD conversion circuit 35, the angle information conversion circuit 37, the display controller 39, the touch panel controller 40, and the torque detection unit 5. Further, the power supply circuit 41 includes a reserve power supply 42 constituted by a rechargeable battery so that the torque measuring device 1 can be driven without being connected to the power supply via the AC adapter 43.

  Note that the control unit 30 of the control unit 13 can be connected to the printer 45 and the USB memory 46, and information on the tightening torque and the like processed by the control unit 30 is predetermined by the user of the torque measuring device 1 to be described later. By this operation, it can be output to the printer 45 or stored in the USB memory 46.

3. Operation of Torque Measuring Device Next, the operation of the torque measuring device 1 according to the embodiment will be described with reference to FIGS. 6 to 20 show images displayed on the display unit 17 of the torque measuring device 1.

  When the torque measuring device 1 is connected to a power source using the AC adapter 43 and the power switch 21 of the torque measuring device 1 is switched from the OFF mode to the AC mode (the power source is turned on), the control unit 30 performs a predetermined calibration. After executing the process, the measurement screen shown in FIG. Here, the predetermined calibration process refers to each measurement parameter of the control unit 13 based on the rating information of the torque sensor unit 4 connected to the control unit 13 in order to perform accurate measurement by the torque sensor unit 4. This is a process for adjusting the reference value of (tightening torque or tightening angle). In the torque measurement device 1 of the embodiment, the control unit 30 reads the rating information from the rating information storage unit 10 of the torque sensor unit 4 when the power is turned on, stores the rating information in the RAM 31, and performs calibration based on the rating information stored in the RAM 31. Process.

  The control unit 30 displays a main menu button 50 for displaying the main menu screen in the lower left part of the measurement screen shown in FIG. When the control unit 30 detects that the user of the torque measurement device 1 has touched the main menu button 50, the control unit 30 displays the main menu screen shown in FIG. 7 on the display unit 17. On the main menu screen, the control unit 30 displays a measurement screen button 51 for displaying a measurement screen, a measurement setting button 52 for displaying a measurement setting screen (see FIG. 10), and a system setting button for displaying a system setting screen (see FIG. 14). 53, a printer output button 54 for displaying a printer output screen (see FIG. 18), a self-diagnosis button 55 for displaying a self-diagnosis screen (see FIG. 20), a USB output button 56 for displaying a USB output screen (see FIG. 19), Are displayed in order from the top. When the control unit 30 detects that the user of the torque measuring device 1 has touched each button, the control unit 30 displays a screen designated by the button on the display unit 17.

  The tightening torque is measured by the torque measuring device 1 by causing the control unit 30 to display a measurement screen on the display unit 17. When the torque sensor unit 4 detects the screw tightening torque of a screw tightening machine such as a nut runner while the control unit 30 is displaying the measurement screen, the signals measured by the torque detection unit 5 and the angle detection unit 7 are controlled. In addition to being input to the unit 30 and processed by the control unit 30 based on the rating information stored in the RAM 31, the tightening torque (unit: N.m (Newton meter)) and the tightening angle (unit: deg ( Degree)) is displayed on the display unit 17. At this time, the measured value includes the data No. (Number) is attached. In the torque measurement device 1 of the embodiment, the tightening torque and the tightening angle are values measured from the snag torque.

  In the measurement screen, the control unit 30 displays a waveform screen button 58 for displaying the waveform screen shown in FIG. When detecting that the user of the torque measuring device 1 touches the waveform screen button 58, the control unit 30 displays the waveform screen shown in FIG. In the waveform screen shown in FIG. 8, the control unit 30 displays the value measured by the torque sensor unit 4 as a torque time waveform. This torque time waveform is obtained by graphing the measured values with the horizontal axis representing time (unit: ms (millisecond)) and the vertical axis representing tightening torque (unit: N.m). In the embodiment, the horizontal axis takes a value of 0 ms to 2000 ms, and the vertical axis is 50.0 N.m. m-100.0N. The value of m is taken. This is because the setting value of the torque waveform full scale 73 and the setting value of the measurement time 75 that can be set by displaying other setting screens (see FIG. 12) described later, and the second measurement setting screen (described later) (see FIG. 12). 11) is set based on the set value of the snag torque 76 that can be displayed and set. The control unit 30 displays the tightening angle measured by the torque sensor unit 4 in the upper right part of the waveform screen.

  The control unit 30 displays a measurement screen button 51 for displaying the measurement screen and a time ⇔ angle button 60 for displaying the waveform screen of the torque angle waveform shown in FIG. 9 at the bottom of the waveform screen of the torque time waveform. To do. When the control unit 30 detects that the user of the torque measuring device 1 has touched the time ⇔ angle button 60, the control unit 30 displays a waveform screen of the torque angle waveform shown in FIG. 9 on the display unit 17. On the waveform screen of the torque angle waveform, the control unit 30 displays the value measured by the torque sensor unit 4 as a torque angle waveform. In this torque angle waveform, the measured value is graphed and displayed with the horizontal axis as the angle (unit: deg) and the vertical axis as the tightening torque (unit: N.m). In the embodiment, the horizontal axis takes a value of 0 deg to 720 deg, and the vertical axis is 50.0 N.N. m-100.0N. The value of m is taken. This is because the setting value of the torque waveform full scale 73 and the setting value of the angle waveform full scale 74 that can be set by displaying other setting screens (see FIG. 12) described later, and the second measurement setting screen described later. (See FIG. 11) is set based on the set value of the snag torque 76 that can be displayed and set. The control unit 30 displays a measurement screen button 51 for displaying the measurement screen and a time ⇔ angle button 60 for displaying the waveform screen of the torque time waveform shown in FIG. 8 at the bottom of the waveform screen. .

  Further, when the control unit 30 detects that the user of the torque measuring device 1 touches the measurement setting button 52 on the main menu screen (see FIG. 7), the control unit 30 displays the measurement setting screen shown in FIG. In the measurement setting screen, the control unit 30 is also referred to as a measurement setting button 61 (hereinafter also referred to as “second measurement setting button 61”) for displaying the measurement setting screen (hereinafter also referred to as “second measurement setting screen”) illustrated in FIG. And other setting buttons 62 for displaying other setting screens shown in FIG.

  When the control unit 30 detects that the user of the torque measurement device 1 touches the second measurement setting button 61 on the measurement setting screen (see FIG. 10), the control unit 30 displays the second measurement setting screen shown in FIG. When the control unit 30 detects that the user of the torque measuring device 1 touches the other setting button 62 on the measurement setting screen (see FIG. 10), the control unit 30 displays the other setting screen shown in FIG. In the second measurement setting screen shown in FIG. 11, the control unit 30 displays the set value currently set for each item such as the torque upper limit value on the left side of the display unit 17, and a numerical value for changing the set value. A key display unit 48 as an equal input button is displayed on the right side of the display unit 17. On the second measurement setting screen, the user of the torque measurement device 1 can select an item whose setting is to be changed by touching the item name, and can correct and input the setting value by operating the key display unit 48. it can. After the set value is corrected, the control unit 30 displays the return button 63 (button for displaying the previously displayed screen) or the measurement screen button 51 displayed on the lower portion of the display unit 17 by the user. When touching is detected, a writing confirmation screen (not shown) is displayed to confirm whether or not the set value can be changed. When YES (may be changed) is selected, the set value is corrected. change.

  In the other setting screen shown in FIG. 12, the control unit 30 displays the set value currently set for each item such as the torque waveform full scale on the left side of the display unit 17, and displays the key display unit 48 on the display unit 17. Is displayed on the right side of. On the other setting screen, the user or manufacturer (hereinafter also referred to as “user or the like”) of the torque measuring device 1 can set whether or not writing to the EEPROM 9 is permitted. When the user or the like of the torque measuring device 1 operates the key display unit 48 and sets the EEPROM setting permission item 49 to “1”, the control unit 30 permits writing to the EEPROM 9. When a user of the torque measuring device 1 operates the key display unit 48 and sets the EEPROM setting permission item 49 to “0”, the control unit 30 prohibits writing to the EEPROM 9. . When the control unit 30 detects that the user or the like of the torque measuring device 1 has touched the return button 63 or the measurement screen button 51 displayed at the bottom of the display unit 17 after the set value has been changed, FIG. As shown in FIG. 14, the setting value writing screen is displayed superimposed on the other setting screens. In the setting value writing screen, when the control unit 30 detects that the user or the like of the torque measuring device 1 has touched the YES button 65, the control unit 30 writes the changed setting value and the user or the like of the torque measuring device 1 determines NO. When it is detected that the button 66 is touched, the setting value is returned to the state before the change without writing the changed setting value. Note that it is possible to set whether or not to permit writing to the EEPROM 9 in this way when the information stored in the storage unit 10 such as the rating information of the EEPROM 9 is changed. This is because there is a possibility that will not operate normally. Therefore, the manufacturer of the torque measuring device 1 sets the EEPROM setting permission item 49 to “0” and prohibits writing to the EEPROM 9 so that the user of the torque measuring device 1 does not change it by mistake. It is desirable.

  When the control unit 30 detects that the user of the torque measuring device 1 touches the system setting button 53 on the main menu screen (see FIG. 7), the control unit 30 displays the system setting screen shown in FIG. On the system setting screen, the control unit 30 displays a calendar setting button 67 for displaying the calendar setting screen shown in FIG. 15 and an EEPROM setting button 68 for displaying the EEPROM setting screen shown in FIG. 6 or FIG. . When detecting that the user of the torque measuring device 1 touches the calendar setting button 67 on the system setting screen (see FIG. 14), the control unit 30 displays the calendar setting screen shown in FIG. On the calendar setting screen, the user of the torque measuring device 1 can set the current date and time by operating the key display unit 48. When the control unit 30 detects that the user of the torque measurement device 1 touches the EEPROM setting button 68 on the system setting screen (see FIG. 14), the EEPROM setting permission item 49 is set for other settings (see FIG. 12). Is set to “0 (prohibited)”, the EEPROM setting screen shown in FIG. 16 is displayed, and the EEPROM setting permission item 49 is set to “1 (permitted)” in other settings (see FIG. 12). If so, the EEPROM setting screen shown in FIG. 17 is displayed. On the EEPROM setting screen shown in FIG. 16, the control unit 30 displays the contents of rating information and the like in the torque sensor unit 4.

  On the other hand, on the EEPROM setting screen shown in FIG. 17, the control unit 30 displays the contents of the rating information and the like in the torque sensor unit 4 on the left side of the display unit 17 and the key display unit 48 on the right side of the display unit 17. To display. On the EEPROM setting screen, the user or manufacturer of the torque measuring device 1 selects an item (for example, rating 47) to be written or rewritten as information on the torque sensor unit 4, and operates the key display unit 48, Information about the torque sensor unit 4 can be changed. If the value is erroneously changed in the EEPROM setting, the torque measuring device 1 may not be able to accurately measure the torque. Therefore, the control unit 30 is not shown when changing the setting of the EEPROM 9. The password entry screen is displayed, and the user is prompted to enter the password. As described above, in the torque measurement device 1 according to the embodiment, by operating the input operation unit 18 of the control unit 13, the rating information storage unit 10 in the EEPROM 9 included in the torque sensor unit 4 connected to the control unit 13 is stored. Information can be written or rewritten. Therefore, when writing the information to the EEPROM 9 of the torque sensor unit 4 when the torque measuring device 1 is manufactured, a separate device such as a ROM writer is not required, so that the writing operation to the EEPROM 9 is facilitated.

  When the control unit 30 detects that the user of the torque measurement device 1 touches the printer output button 54 on the main menu screen (see FIG. 7), the control unit 30 displays the printer output screen shown in FIG. On the printer output screen, the user of the torque measuring device 1 can select the data No. By inputting (number), the measurement data by the torque measuring device 1 can be printed by the printer 45 connected to the control unit 13. When it is detected on the main menu screen (see FIG. 7) that the user of the torque measuring device 1 has touched the USB output button 56, the USB output screen shown in FIG. 19 is displayed. On the USB output screen, the user of the torque measurement device 1 can write all measurement data by the torque measurement device 1 and the latest waveform data in the USB memory 46 connected to the control unit 13.

  When the control unit 30 detects that the user of the torque measuring device 1 touches the self-diagnosis button 55 on the main menu screen (see FIG. 7), the control unit 30 displays a self-diagnosis screen shown in FIG. On the self-diagnosis screen, the control unit 30 displays a reference value (in other words, a value serving as an origin) of each measurement parameter (a tightening torque and a tightening angle) when measurement is performed by the connected torque sensor unit 4. At the same time, the ON button 70 for forced zero check is displayed. When the ON button 70 is touched, the control unit 30 executes a predetermined calibration process.

4). Effect of Torque Measuring Device According to Embodiment As described above, the torque measuring device 1 according to the embodiment includes the torque sensor unit 4 attached to the screw tightening machine and capable of measuring at least the tightening torque of the screw tightening machine. Unit 17 and a RAM 31 (first storage unit) in which rating information (torque sensor unit information) indicating the performance of the torque sensor unit 4 is stored, and the measurement result measured by the torque sensor unit 4 is stored in the RAM 31. A control unit 13 that processes and displays on the display unit 17 based on the stored rating information is provided. The torque sensor unit 4 includes an EEPROM 9 (second storage unit), and the control unit 13 includes an operable input operation unit 18. By operating the input operation unit 18, rating information and the like (torque sensor unit information) Can be written to the EEPROM 9.

  According to the torque measurement device 1 of the embodiment, by operating the input operation unit 18 of the control unit 13, rating information and the like can be written into the EEPROM 9 of the torque sensor unit 4. Therefore, without using a separate writing device (ROM writer), the torque sensor unit information such as the rating information can be easily input to the EEPROM 9 of the torque sensor unit 4 when the torque measuring device 1 is manufactured. Can do.

  The torque measuring device 1 according to the embodiment is when the torque measuring device 1 is in operation (when the power is turned on) and when rating information (torque sensor unit information) is stored in the EEPROM 9 (second storage unit). The control unit 13 reads the rating information stored in the EEPROM 9 from the EEPROM 9 and stores it in the RAM 31 (first storage unit).

  The torque measuring device 1 processes the measurement result measured by the torque sensor unit 4 based on the rating information stored in the RAM 31. According to the torque measuring device 1 of the embodiment, the torque measuring device 1 is activated ( Since the rating information is read from the EEPROM 9 and written in the RAM 31 by the control unit 13 when the power is turned on, the user of the torque measuring device 1 himself / herself puts the rating information of the torque sensor unit 4 in the RAM 31 of the control unit 13. No need to enter.

  Further, in the torque measurement device 1 of the embodiment, the control unit 13 measures torque based on the rating information (torque sensor unit information) read from the EEPROM 9 (second storage unit) and stored in the RAM 31 (first storage unit). When the apparatus 1 is in operation, a predetermined calibration process is performed.

  The torque measuring device 1 cannot perform correct measurement unless calibration processing based on the rating information of the torque sensor unit 4 is performed. However, according to the torque measuring device 1 of the embodiment, the torque measuring device 1 At the time of operation, the calibration process based on the rating information read from the EEPROM 9 by the control unit 13 and stored in the RAM 31 is performed, so that the possibility of erroneous measurement without performing the calibration process can be reduced. .

5. Modification Example A modification example will be described below. In the description of the modified example, the same components as those of the torque measuring device 1 of the embodiment are denoted by the same reference numerals as those of the torque measuring device 1 of the embodiment, and the description thereof is omitted.

  In the torque measurement device 1 according to the embodiment, the second storage unit is configured using the EEPROM 9. However, if the rewritable memory is used, the second storage unit is configured using another storage medium such as an SD memory card (trademark or registered trademark). May be.

  In the torque measurement device 1 of the embodiment, the display unit is configured using the display unit 17 of the display 16 with a touch panel, but may be configured using another display unit such as a dot matrix display unit. In the torque measurement device 1 of the embodiment, the input operation unit is configured to include the input operation unit 18 in the display 16 with the touch panel, but is configured using other input devices such as a keyboard configured by arranging push button switches. May be.

DESCRIPTION OF SYMBOLS 1 ... Torque measuring device 4 ... Torque sensor part 9 ... EEPROM (2nd memory | storage part)
DESCRIPTION OF SYMBOLS 13 ... Control part 16 ... Display with a touch panel 17 ... Display part 18 ... Input operation part 31 ... RAM (1st memory | storage part)

Claims (3)

A torque sensor unit attached to the screw tightening machine and capable of measuring at least the tightening torque of the screw tightening machine;
A display unit and a first storage unit storing torque sensor unit information indicating the performance of the torque sensor unit, and the measurement result measured by the torque sensor unit is stored in the first storage unit. In the torque measuring device including a control unit that processes and displays on the display unit based on the torque sensor unit information,
The torque sensor unit includes a second storage unit,
The control unit includes an operable input operation unit, and is configured to be able to write the torque sensor unit information to the second storage unit by operating the input operation unit. apparatus.   When the torque measuring device is in operation and the torque sensor unit information is stored in the second storage unit, the control unit stores the torque sensor unit information stored in the second storage unit. The torque measurement device according to claim 1, wherein the torque is read from the second storage unit and stored in the first storage unit.   The control unit performs a predetermined calibration process when the torque measuring device is operated based on the torque sensor unit information read from the second storage unit and stored in the first storage unit. The torque measuring device according to claim 2.

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