JP2007111797A - Torque machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To indicate when tightening torque is inspected and on which workpiece it is inspected when stored inspection results are displayed on a display means after the inspection on a torque wrench for inspecting the tightening torque. <P>SOLUTION: A processor 6 provided on a torque wrench body displays an inspection torque value on a second display 9 and inspection time on a first display 8, and stores the inspection time corresponding to the inspection torque value in a memory 31. A workpiece name is registered in the first display 8 in addition to the inspection time. When the inspection torque value stored in the memory 31 is retrieved, the inspection time and the workpiece name are displayed on the first display 8. <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 a torque device having a processing device to be stored in memory and a display means for displaying information processed by the processing device, the processing device determines which workpiece fastening member the inspection torque value stored in the memory is. Corresponding correspondence information is stored, the inspection torque value is called together with the correspondence information, and displayed on the display means.

  Further, as the correspondence information, as described in claim 2, it is time information storing an inspection torque value, as in claim 3, it is the name of the workpiece, As described, it is possible to exemplify the time information storing the inspection torque value and the name of the workpiece.

  Here, examples of the work name include a product number and a customer name.

  According to the present invention, it is possible to easily recognize when the inspection torque value is inspected and which workpiece is a fastening member, and only with a torque device such as one torque wrench. Work quality control is now possible.

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 the unit of torque (N.m) on the right side of the battery remaining amount display unit 8a is provided. 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, 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.
Second Embodiment In the first embodiment described above, the measurement time is associated with the inspection torque value and stored in the memory, and when the stored data is recalled, the measurement time is displayed together with the inspection torque value, thereby allowing the workpiece to be displayed. Can be identified. On the other hand, in the second embodiment, the work name is further 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, the time information in the first embodiment is also stored. Only the workpiece name may be displayed corresponding to the inspection torque value.

  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.

  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 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 2nd Embodiment. The figure which shows the display state explaining 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 (4)

A torque device main body that applies torque by engaging with a fastening member that is tightened to a workpiece to be measured, and detects the torque by a torque detection unit;
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,
The processing device stores correspondence information associating with which work fastening member the inspection torque value stored in the memory is associated, calls the inspection torque value together with the correspondence information, and displays it on the display means. Torque equipment characterized by causing   The torque device according to claim 1, wherein the correspondence information is time information storing an inspection torque value.   The torque device according to claim 1, wherein the correspondence information is a name of the workpiece. The torque device according to claim 1, wherein the correspondence information includes time information storing an inspection torque value and a name of the workpiece.

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