JP2007111798A - Torque machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a torque machine capable of memorizing the number of inspected workpieces and inspection torque to check necessary numerical values of a corresponding workpiece when a plurality of kinds of workpieces are inspected by a torque wrench for inspecting tightening torque. <P>SOLUTION: A processor 6 in the torque wrench for inspecting additional tightening has regions to be inspected, the number of tightened members to be inspected for each workpiece and a qualified range of a tightening torque value for the tightened member registered. It displays the registered contents on a first display 8 and a second display 9, and also determines an inspection torque value to pass when it is within the qualified range. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a torque device such as a torque wrench and a torque driver for inspecting a tightening torque, and more particularly to a torque device such as a torque wrench capable of managing an inspection object and an inspection result.

  In a torque device such as a torque wrench or a torque driver, an inspection torque wrench for inspecting whether a bolt, a nut, or the like is tightened with a predetermined torque value has been proposed. In such a torque wrench for inspection, a display unit for displaying a detected torque value as an inspection result is provided in the torque wrench body (Patent Documents 1 and 2).

The torque wrench for inspection as a torque device shown in Patent Documents 1 and 2 includes a memory for storing the inspection result, and can display the inspection result on the display unit later.
JP 2002-120162 A JP 2005-265433 A

  As an example of inspecting the tightening torque using such an inspection torque wrench, there is an automobile manufacturing process. In this case, whether or not the vehicle to be inspected is bolted with a predetermined torque value is determined by the above-described inspection torque wrench. In one vehicle, one inspection torque wrench is used. Inspect various sites continuously. When the inspection of one vehicle is completed, the next vehicle is similarly inspected and continuously executed.

  In the inspection torque wrench, when the tightening torque of the bolt to be inspected is detected, the value is displayed on the display section, so whether or not the bolt to be inspected is tightened with an appropriate torque on the spot. I can judge.

  However, when the data stored in the memory of the torque wrench is to be examined later, the stored data is enormous, and it is difficult to specify which workpiece the inspection result is for.

  The present invention has been made in view of such a viewpoint, such as a torque wrench for inspection that can clarify the relationship between data stored in a memory of a torque device such as a torque wrench and a workpiece, a torque driver for inspection, and the like. The object is to provide a torque device.

  As a configuration of a torque device that realizes the object of the present invention, as described in claim 1, a torque is applied by engaging a fastening member fastened to a workpiece to be measured, and the torque is detected by torque. A torque device main body to be detected by the means, a torque value provided in the torque device main body and tightened to the fastening member based on detection information from the torque detection means, and the calculated inspection torque value stored in the memory In the torque device having the processing device to be stored and the display means for displaying the information processed by the processing device, the processing device includes a part to be inspected for each work, and the number of fastening members to be inspected in the part and The passing range of the fastening torque value for the fastening member is registered, and the registered content is displayed on the display means, and the inspection torque value is displayed in the passing range. Characterized in that as an internal and determines acceptance.

  The display means displays the name of the inspection part of the workpiece, the inspection result, and the pass / fail judgment result.

  The above processing device manages at least the inspection torque value, the pass / fail judgment result, and the measurement time.

  The processing apparatus described above manages the inspection result by assigning a unique number to the fastening member to be inspected.

  Further, the processing apparatus can manage a plurality of workpieces to be measured as a group, and select an arbitrary group from the plurality of groups.

  According to the present invention, even if the workpiece to be measured is changed, the number of fastening members at the inspection site and the torque value in the pass range can be confirmed only by selecting the corresponding workpiece from its name. Also, the inspection result can be confirmed for each inspection of the fastening member.

  In addition, since multiple workpieces to be measured are managed as a group, selecting the corresponding group narrows down to only the workpieces that are to be measured, greatly reducing the work of checking the workpiece to be measured. it can. In addition, since the number of fastening members can be confirmed for each part, forgetting to check can be prevented.

Hereinafter, the present invention will be described based on embodiments shown in the drawings.
First Embodiment FIG. 1 shows a first embodiment of an inspection torque wrench with a display unit to which the present invention is applied, wherein (a) is a top view, (b) is a front view, and (c) is a front view. It is an enlarged top view of the arithmetic processing apparatus provided with the display part. The torque wrench of the present embodiment is a torque wrench for tightening inspection, and measures the torque value at which the bolt is actually tightened.

  The torque wrench main body 1 is mounted with a socket 3 or the like as an engaging portion that engages with a driving portion (for example, a bolt head or a nut) of a fastening part at a front portion of a lever 2 formed of a rigid pipe member. The head 4 to be exchanged is attached in a replaceable manner, and a grip member 5 is attached to the rear portion of the lever 2. Further, for example, a strain gauge portion (not shown) is disposed inside the lever 2, and the torque from the rear end portion of the head 4 inserted in the lever 2 acts on the strain gauge portion to generate torque. A signal for detection is output, and this signal is input to the arithmetic processing unit 6. The arithmetic processing unit 6 is attached to the lever 2, for example, is attached so as to be rotatable around the longitudinal axis of the lever 2, and the direction of the surface of the arithmetic processing unit 6 can be changed.

  As described above, the torque wrench having the arithmetic processing device 6 in the torque wrench main body 1 is rotated in the clockwise direction by the operator holding the grip member 5 with the socket 3 engaged with the head of the bolt, for example. By doing so, the bolt is tightened, and the torque value at that time is displayed on the display unit.

  The arithmetic processing device 6 has a first display portion 8 made of liquid crystal display means and a second display portion 9 made of 7 segment LED display means arranged side by side in the left-right direction on the upper surface portion 7a of the external case 7 of the device. A power switch 10, a counter feed key 11, a counter return key 12, a mode key 13, and a clear key 14 are arranged on the same surface in that order from the left end to the right end. A memory key 15 is arranged at a position where the thumb of the operator's hand hits the hand.

  FIG. 2 is a block diagram showing an electric circuit of the arithmetic processing unit 6. In FIG. 2, the arithmetic processing unit 6 includes an applied voltage unit 22 for applying a voltage to the strain gauge unit 21 and an analog amplification unit 23 for amplifying a detection signal that is analog data from the strain gauge unit 21. A signal processing unit 24 that processes the detection signal amplified by the analog amplification unit 23, an A / D converter 25 that digitally converts the detection signal processed by the signal processing unit 24, and the voltage of the battery unit 26 in each circuit. And an applied voltage control unit 28 for controlling the applied voltage for power saving with respect to the applied voltage unit 22.

  The arithmetic processing unit 6 is provided with a CPU unit 29 for controlling the entire arithmetic processing unit 6, and a detection signal from the A / D converter 25 is input to the arithmetic unit 30 to execute various calculations. Is done. Then, calculation results and the like are stored in the memory 31.

  In addition, the CPU unit 29 controls display on the first display unit 8 that is the LCD display unit and the second display unit 9 that is the 7-segment LED display unit.

  The arithmetic processing unit 6 receives a switch signal from the power switch 10, a signal output by a key operation such as a counter feed key 11, a counter return key 12, a mode key 13, and a clear key 14 from the key operation unit 33. The processing corresponding to these key operations is executed, and the processing results are displayed on the first display unit 8 and the second display unit 9.

  Note that the arithmetic processing unit 6 according to the present embodiment can transmit and receive data to and from the external data input / output unit 35 via the communication data processing unit 34 by infrared communication or wired communication. Further, the external data input / output unit 35 is controlled to be energized by a power source via a power source control unit 36 in order to save power in response to a signal from the communication data processing unit 34. Further, the clock means 37 is driven by the backup battery 37, and the calendar and time data of the clock means 37 are taken into the CPU 29, stored together with the torque detection data in the memory 31, and displayed on the first display unit 8. In addition, a buzzer (not shown) for warning and key operation is notified by a beep sound.

  Then, the calculation unit 30 of the CPU 29 determines that the torque value when the bolt starts to move is the tightening inspection torque value, and causes the first display unit 8 to display this torque value. If the inspection torque value (actually measured value) is within a predetermined range with respect to the torque value set for the bolt that is to be inspected, the arithmetic unit 30 determines that the test is acceptable, and is out of the predetermined range. Judged as rejected. For example, when the measured value is determined to be the tightening inspection torque value, if this inspection torque value is acceptable, the beep sound is made long, and if it is unacceptable, the beep sound is short and discontinuous. Informs pass / fail judgment instantly.

  The method for determining the tightening inspection torque is not limited to the above-described method shown in Patent Document 1 described above, and may be the method shown in Patent Document 2 described above.

  The first display unit 8 of the liquid crystal display adopts a reflection type liquid crystal display method, and is divided into two upper and lower levels as shown in FIG. 3, and the battery remaining amount display unit 8a is displayed on the upper level using a picture display. A unit display unit 8b for displaying a dedicated amount and displaying a unit of torque (N.m) on the right side of the battery remaining amount display unit 8a is provided. Further, a small point number is provided on the left side of the battery remaining amount display unit 8a. In addition, a small point display unit 8c for appropriately displaying a time display and a counter (newly stored data, used as a management number of already stored data), a mode display and the like in characters is provided.

  The lower display 8d displays the torque value, time, counter number, etc., using large-point numbers, characters, etc. in the entire left and right area.

  Further, the torque value is displayed on the 7-segment second display unit 9.

  When the standard mode is selected by operating the mode key 13 of the key operation unit 33, display using the two display units of the first display unit 8 and the second display unit 9 is performed.

  In FIG. 4, the first display unit 8 shown on the left side displays a counter on the lower display unit 8d, and the torque value is displayed on the second display unit 9 shown on the right side. In addition, the current time is displayed on the small point display section 8c of the first display section 8.

  The counter number displayed on the first display unit 8 is used as a management number for managing, for example, a bolt as a ratio inspection target to be inspected by this torque wrench. Three displays from the top of FIG. The torque value at “001” is shown. When torque is applied for inspection, the peak value (for example, 51.2) is held, the peak value is updated, and when the tightening inspection torque value is reached, the torque value ( For example, 100.0) is displayed. When the memory key 15 is turned on, the inspection torque value of the bolt with the management number 001 is stored in the memory 35 together with the measurement time as 100.0. Then, the value of the counter is automatically counted up to 002, and a torque value display standby state is entered for the next bolt inspection.

  As for the management data such as the inspection torque value by the tightening inspection method of each bolt stored in the memory 35 in this way, when the mode key 13 is pressed and the memory call is selected, as shown in FIG. Then, a counter display is made on the lower display section 8d, and a torque value corresponding to the counter number stored in the memory 31 is displayed on the second display section 9.

  The first display unit 8 at the upper end of FIG. 5 shows a case where the counter number is designated as “201”, but since there is no data in the memory 31, the torque value is “0.0” on the second display unit 9. Is displayed. The counter number is increased / decreased by operating the counter feed key 11 and the counter return key 12. When the counter return key 12 is operated to return one counter number, the counter number “8” is displayed on the small point display portion 8c. 200 "is displayed for 1 second, for example, and time data in which torque data of the counter number" 200 "is stored is displayed in the lower display portion 8d. When one second has elapsed, a counter number “200” is displayed on the lower display portion 8 d of the first display portion 8, and the torque value “98.0” stored with this counter number is displayed on the second display portion 9. indicate. When no data is recorded for the counter number “200”, “0.0” is displayed on the second display unit 9.

  As described above, when the stored data is called up, the time at the time of measurement is displayed on the first display unit 8 corresponding to the called inspection torque value. When the inspection for the tightening torque of the bolt is performed in the automobile manufacturing process, the time when the automobile (work) to be inspected starts the inspection is separately recorded in the automobile manufacturing process. Therefore, the work corresponding to the called inspection torque value can be easily identified by checking the inspection start time of the work.

  In this embodiment, the work name is registered in the memory 31, and the work name is displayed in association with the inspection torque value when the data is called.

  For example, as shown in FIG. 6 (a), names (N-0001, N-0002, N-0003, N-0004, N-0005) of different types of vehicles (work) are registered in the vehicle production line. . In the registration of the workpiece name, the workpiece name is input in advance from a terminal device such as an external personal computer via the external data input / output unit 35.

  The registered work name is selected by operating the mode key 13 to enter the work name mode, and one work name is displayed on the first display unit 8, and the work can be selected by operating the counter feed key 11 or the counter return key 12. When the displayed work name is the target work name, the memory key 15 is pressed to set the work name. As a result, the inspection torque value stored until the next work name setting is executed is stored as a value for the work name. In this case, time information is also stored.

  When the data stored in the work name mode setting is recalled, the work name (N-001 in this case) is first displayed on the lower display 8d of the first display 8 as shown in FIG. In addition, the measurement start time of the workpiece N-001 is displayed on the small point display portion 8c. When the counter feed key 11 is pressed in this state, as shown in FIG. 7B, the management number (in this case, 120) is displayed on the lower display portion 8d, and the inspection torque value (in this case, in this case) is displayed. 100.0) is displayed. Each time the counter feed key 11 is pressed, the management number increases by one.

  For example, when the mode key 13 is operated while the memory key 15 is pressed, the work names are sequentially changed.

FIG. 6A shows a case where an inspector is waiting at a predetermined position of an automobile production line (composite line), whereas FIG. 6B shows that an inspector is 1 at an automobile manufacturing factory. It shows a case where a sampling inspection is performed by circulating a plurality of processes with a torque wrench. Also in the case shown in FIG. 6B, work names (G-0001, G-0002, G-0003, G-0004, G-0005) of a plurality of vehicle types manufactured in the same manner as in FIG. By storing the workpiece name in advance and setting the workpiece name to be extracted and inspecting the tightening torque, the workpiece can be confirmed later from the inspection result or the inspection result from the workpiece name.
Second Embodiment In FIG. 6A, an automobile having a work name N-0001 has, for example, 10 parts to be inspected (front and rear left and right doors, left and right front and rear tires, etc.) for inspecting the tightening state of bolts. If (part 1 to part 10) exist, the number of inspection target parts and the inspection torque may be different for the work name N-0002, which is a work to be inspected next. For this reason, it is necessary to confirm the number of inspections and the inspection torque value every time the inspection work is different.

  Therefore, in the third embodiment, the part name for each work, the number of bolts for each part, and the torque value for pass / fail judgment for the inspection by the personal computer via the external data input / output unit 35 shown in FIG. Register the management width (upper limit and lower limit).

  When the work name is registered by the method shown in the first embodiment, the part name corresponding to the work is subsequently registered.

  As part names, the right (R) front door (FDOOR) is “FDDR-R” in FIG. 8A, and the right (R) front tire (FTYR) is “FTYR-R” in FIG. 8B. 8 indicates that the number of bolts to be inspected for tightening the right front door is three, indicates that the number of bolts to be inspected for tightening the right front tire is four, and FIG. As shown, the part name is displayed on the first display unit 8 and the number of bolts is displayed on the second display unit 9.

  As for the management range of the torque value, an indication display of “UPPER” indicating an upper limit and “LOWER” indicating a lower limit is displayed on the first display unit 8, and upper and lower limit values are displayed on the second display unit 9. In FIG. 8C, as an example, the upper limit value of the right front door torque value is set to 14.00 (N · m), the lower limit value is set to 11.00 (N · m), and the torque value of the right front tire is set to the upper limit value of 14.00 (N · m). N · m), indicating that the lower limit is set to 11.00 (N · m).

  When inspecting, the inspection order of a plurality of parts is determined in advance, and the inspection order of a plurality of bolts is determined in advance. When the work name is determined, the right front door (FDDR-R) is displayed as the first part. The number 8 of bolts is displayed on the second display unit 9. The inspector confirms this display and starts the bolt tightening inspection in a predetermined order. When the first inspection is completed, 1/3 indicating the first is displayed on the first display portion 8 and the inspection torque value is displayed on the second display portion 9. In addition, on the pass / fail determination lamp 9a provided on the side of the second display unit 9, blue indicating acceptance and red indicating failure are displayed as determination results. Since the first inspection torque value is 12.20, it is determined that it is within the management range, the pass / fail determination lamp 9a is lit in blue, and the beep sound is long and the pass is notified.

  Subsequently, the operation of the second bolt is started and the calculation unit 30 detects that a constant torque has been applied, or when a predetermined time has elapsed after the pass / fail determination lamp is lit, the display on the first and second display units is displayed. As a result of the resetting, 2/3 indicating the second display is displayed on the first display unit 8. When the second inspection is completed, the inspection torque value as the inspection result is displayed on the second display unit 9. Also in this case, since the inspection torque value is within the management range, the pass / fail determination lamp 9a and the beep sound are lit in the same manner as the first one, and the beep sound is also emitted in the same manner.

  However, in the third inspection (3/3), since the inspection torque value did not reach the lower limit value of the management width, it was determined to be unacceptable, the pass / fail determination lamp 9a was lit red, and the beep sound was intermittent. It rings.

  Next, when the part is in the order of the right front front tire (FTYR-R), the part name “FTYR-R” is displayed on the first display unit 8 and the number of bolts 4 is displayed on the second display unit 9. . Then, for example, when a predetermined time elapses, the torque value management width is displayed, and 1/4 indicating the first is displayed on the first display unit 8, and the inspection torque value is displayed by performing the same inspection on this part. A pass / fail judgment is executed. The inspection result thus inspected is stored in the memory 31 as shown in FIG. 9, and the stored data can be called up.

  In addition, if the type of vehicle to be manufactured on a single production line is determined in the automobile production line, it is automatically manufactured by selecting the production line number by registering different types of workpieces for each production line. The work in the line can be displayed.

  In this way, the number of bolts to be inspected in each inspection part and the management range of the torque value that is a criterion for the pass / fail judgment of the inspection can be set so that the part to be inspected can be displayed with the part name for one workpiece. Therefore, the inspector can definitely inspect the bolt to be inspected at each part of the work by simply selecting the type of the work to be inspected next. And when checking a test result later, even if a test is forgotten, this can be checked.

  In each of the above-described embodiments, the inspection on the automobile production line is described as an example. However, the inspection is not limited to the automobile production line, and the delivery destination or owner of the workpiece to be inspected is used. If the customer name is known, the customer name of the workpiece may be registered.

The torque wrench which applied this invention is shown, (a) is an external appearance top view of a torque wrench, (b) is a front view of (a), (c) is an enlarged top view of the arithmetic processing unit provided with the display part. The block diagram of the arithmetic processing unit of FIG. The figure which shows the display state of the display part provided in the arithmetic processing apparatus of FIG. The figure which shows the display form in the 1st and 2nd display part. The figure which shows the state which called the memory data. The figure for demonstrating 1st Embodiment. The figure which shows the display state explaining 1st Embodiment. The figure which shows 2nd Embodiment. The figure which shows the measurement result of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Torque wrench main body 2 Lever 3 Socket 4 Head 5 Grip member 6 Arithmetic processing unit 7 Appearance case 8 1st display part 8a Battery residual amount display part 8b Unit display part 8c Small point display part 8d Lower stage display part 9 Second display part 10 Power switch 11 Counter feed key 12 Counter return key 13 Mode key 14 Clear key 15 Memory key 21 Strain gauge section 22 Applied voltage section 23 Analog amplification section 24 Signal processing section 25 A / D converter 26 Battery section 27 Power supply circuit section 28 Application Voltage control unit 29 CPU unit 30 Calculation unit 31 Memory 32 Display control unit 33 Key operation unit 34 Communication data processing unit 35 External data input / output unit 36 Power supply control unit 37 Clock means

Claims (5)

A torque device main body for applying torque by engaging a fastening member fastened to a workpiece to be measured, and detecting the torque by a torque detection means;
A processing device that is provided in the torque device main body, calculates a torque value at which the fastening member is tightened based on detection information from the torque detection means, and stores the calculated inspection torque value in a memory;
In the torque device having display means for displaying information processed by the processing device,
In the processing apparatus, a part to be inspected for each workpiece, the number of fastening members to be inspected in the part, and a passing range of a fastening torque value for the fastening member are registered, and the registration content is displayed on the display unit. In addition, a torque device characterized by determining whether the inspection torque value is within the acceptable range.   The torque device according to claim 1, wherein the display means displays a name of an inspection site of the workpiece, an inspection result, and a pass / fail judgment result.   The torque device according to claim 1, wherein the processing device manages at least an inspection torque value, a pass / fail determination result, and a measurement time.   The torque device according to claim 3, wherein the processing device manages the inspection result by assigning a unique number to a fastening member to be inspected. 5. The torque device according to claim 1, wherein the processing device manages a plurality of groups of workpieces to be measured as a group, and can select an arbitrary group from the plurality of groups.

Images