JP2017056532A - Forgetting tightening prevention system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to identify a tightening tool for tightening by a torque wrench even if a work for identification of the tightening tool is not performed.SOLUTION: A torque wrench detects that a torque when tightening a tightening tool reaches a specified value, and transmits a detection signal to the exterior. A tablet PC receives the detection signal, identifies a tightening tool which exists within a range in which a distance between the tightening tool and the torque wrench is determined, and so displays identification information which indicates the identified tightening tool and a result which is indicated by the received detection signal as to associate both with each other. The torque wrench acquires positional information concerning the torque wrench and transmits the same to a display device. The display device identifies the tightening tool which exists within a range in which a distance between the tightening tool and the torque wrench is determined on the basis of the received positional information and pre-stored positional information concerning a tightening tool.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a technique for preventing forgetting to tighten a fastener.

  In ground improvement work such as a runway in service, a large number of holes with a diameter of about 200 mm are drilled in a pavement plate at intervals of about 1 m, and a chemical solution or the like is injected from the holes. A protective cap is installed in the hole in case the runway is temporarily released during ground improvement. The protective cap includes a cylindrical main body that is in contact with the hole wall, a lid that covers an upper portion of the main body, and a fastener that includes a bolt and a nut for fixing the lid to the main body. A torque wrench is used to tighten the fasteners, because if the lid is removed while the runway is in use, it may lead to a serious accident. However, there are cases where the number of protective caps reaches several hundreds, and it is necessary to complete the tightening operation in a short time.

  Techniques relating to torque management of a fastener tightened with a torque wrench are disclosed in the following patent documents. The tightening data management system described in Patent Document 1 displays a list of torque measurement values received from a torque wrench in real time on a monitor of the tightening data management device, thereby completing the tightening operation with the torque wrench. It is configured to allow the operator to confirm the tightening state of the bolts. In the technique described in Patent Document 2, the joint number (bar code) of the flange portion is read by a bar code reader, and is input to the operator management terminal via the wireless unit. When tightening of one bolt is completed, the tool ID code and A tightening completion signal is transmitted from the torque wrench and input to the operator management terminal. The worker management terminal outputs these signals to the data entry terminal. The work site management computer counts the number of times the work data output to the data entry terminal is input every time a tightening completion signal is input, and determines whether this count value is the total number of bolts in the flange portion for each tool. When it is determined that the count value has reached the total number of bolts, all the operations at that operation position have been completed.

JP 2006-320984 A JP 7-105469 A

However, in the technique of Patent Document 1, since it is necessary for an operator to identify a bolt tightened with a torque wrench, an identification error may occur. In the technique of Patent Document 2, an operation for an operator to read a barcode with a barcode reader occurs.
Therefore, the present invention provides a technique capable of identifying a fastening tool without performing an operation for identifying the fastening tool to be fastened with a torque wrench.

The present invention provides a specified torque detecting means for detecting that the torque when the fastening tool is tightened reaches a specified value, and a case where the specified torque detecting means detects that the torque has reached the specified value. A torque wrench having a transmission means for transmitting the detection signal to the outside, a receiving means for receiving the detection signal transmitted by the transmission means, and a fastening tool in which the distance between the torque wrench is within a determined range A display device comprising: identification means for identifying the identification information; identification information indicating the fastener identified by the identification means; and a display means for displaying the result indicated by the detection signal received by the reception means in association with each other. Provide a system to prevent forgetting to tighten.
In the above configuration, the display unit may display the identification information and the result in association with each other when the distance is within the determined range for a predetermined period or longer.
In the above-described configuration, the display unit continues when the distance is within the determined range for the determined period or more and the detection signal is received by the receiving unit within the determined period. The identification information and the result may be displayed in association with each other.
In the above configuration, the torque wrench includes an acquisition unit that acquires position information of the torque wrench, and a position information transmission unit that transmits the position information acquired by the acquisition unit to the display device. Has position information receiving means for receiving the position information transmitted by the position information transmitting means, and the identification means includes the position information received by the position information receiving means and the position of the fastener stored in advance. Based on the information, a fastener having a distance from the torque wrench within the determined range may be identified.
In the above configuration, the display means may display identification information indicating a fastener whose torque has not reached the specified value.
Said structure WHEREIN: You may provide the recording means which records the completion time of the fastening operation | work by the said torque wrench about each of the said fasteners.

  According to the present invention, it is possible to identify a fastening tool without performing an operation for identifying a fastening tool to be fastened with a torque wrench.

The figure which shows the management system which concerns on embodiment. The figure which shows the external appearance of the torque wrench 1. FIG. The figure which shows the electrical structure of the torque wrench 1. FIG. The figure which shows the electrical constitution of tablet PC3. The figure which shows work DB. The figure which shows a menu screen. The flowchart which shows operation | movement of tablet PC3. The figure which shows the example of a screen. The figure which shows the example of a screen. The figure which shows the example of a screen. The figure which shows the example of a display of a work result. The flowchart of a modification.

An example for carrying out the present invention will be described.
<Configuration>
FIG. 1 is a diagram illustrating a management system according to the embodiment. The management system includes a torque wrench 1, a tablet PC (personal computer) 3, a USB (Universal Serial Bus) memory 5, and a PC 6. The tablet PC 3 is an example of a display device according to the present invention.

  FIG. 2 is a diagram illustrating an external appearance of the torque wrench 1. (A) is a top view, (b) is a side view. The torque wrench 1 is a tool for tightening a fastener. The fastening tool is, for example, a bolt or a nut for fastening a lid of a protective cap provided on the runway to the main body. The torque wrench 1 includes a gripping part 11, a shaft 12, a head 13, a wireless communication part 14, a position information acquisition part 15, and a data processing part 20. A grip 11 is provided at one end of the shaft 12, and a head 13 is provided at the other end of the shaft 12. A data processing unit 20 and a wireless communication unit 14 are provided at the center of the shaft 12. The head 13 is provided with a position information acquisition unit 15.

  FIG. 3 is a diagram showing an electrical configuration of the torque wrench 1. The data processing unit 20 includes a control unit 21, a storage unit 22, a display unit 23, and an operation unit 24. The control unit 21 includes an arithmetic device such as a CPU (Central Processing Unit) and a storage device such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The ROM stores firmware that describes the startup procedure of hardware and an OS (Operating System). The RAM is used for storing data when the CPU executes an operation. The storage unit 22 includes, for example, a semiconductor memory, and stores an OS, application programs, and the like. The display unit 23 includes, for example, a liquid crystal display device, and displays a specified value or measured value of torque. The operation unit 24 includes, for example, a keypad, accepts operations such as setting and resetting of specified values, and outputs information corresponding to the operation to the control unit 21.

  The wireless communication unit 14 includes a communication I / F (Interface) for communicating with the tablet PC 3 in accordance with, for example, a Bluetooth (registered trademark) protocol. The position information acquisition unit 15 receives, for example, a signal transmitted from a navigation satellite of GNSS (Global Navigation Satellite System) at a predetermined time interval (for example, every one second), and based on the received signal, the position of the torque wrench 1 The position information of the torque wrench 1 is acquired by calculating the position (an example of an acquisition unit). The position information acquisition unit 15 transmits the acquired position information to the tablet PC 3 via the wireless communication unit 14 (an example of position information transmission means). That is, in this embodiment, the position information of the torque wrench 1 is transmitted to the tablet PC 3 at intervals of 1 second. The torque measurement unit 16 includes a torque sensor that measures torque when the fastener is tightened, and outputs a measurement value to the control unit 21. The storage unit 22 stores a prescribed torque value. The default value can be changed. The control unit 21 compares the measured value with a specified value and detects that the measured value has reached the specified value (an example of a specified torque detecting unit). When the control unit 21 detects that the measurement value has reached the specified value, the control unit 21 transmits a detection signal to the tablet PC 3 via the wireless communication unit 14 (an example of a transmission unit).

  FIG. 4 is a diagram illustrating an electrical configuration of the tablet PC 3. The control unit 31 includes an arithmetic device such as a CPU and a storage device such as a ROM and a RAM. The ROM stores firmware that describes hardware and OS startup procedures. The RAM is used for storing data when the CPU executes an operation. The storage unit 32 includes, for example, a semiconductor memory, and stores an OS, application programs, and the like.

  The display unit 33 includes, for example, a liquid crystal display device, and displays a GUI (Graphic User Interface) screen for the user to operate the tablet PC. The operation unit 34 includes, for example, a touch panel and a keypad, receives an operation performed by the user, and outputs information corresponding to the operation to the control unit 31. On the touch panel, operations such as tapping and flicking are possible. The wireless communication unit 35 includes a communication I / F for communicating with the wireless communication unit of the torque wrench in accordance with, for example, a Bluetooth protocol. The external I / F unit 36 is a connector for mounting, for example, the USB memory 5.

  FIG. 5 is a diagram showing a work DB (Data Base). The work DB is a database in which “identification information”, “position information”, “work result”, and “completion date” are associated with each other. “Identification information” is information for identifying a fastener, and in this example, is represented by a multi-digit number. “Position information” is information representing the position of the fastener, and in this example, is represented by latitude and longitude. “Work result” represents the result of the tightening work of the tightening tool by the torque wrench 1, and “NG” is set as an initial value. When a detection signal is received from the torque wrench 1, it is rewritten to “OK”. “Completion date / time” is the date / time when the tightening operation is completed, for example, the date / time when “Work result” is rewritten to “OK”.

<Operation>
The worker creates master data in advance. The master data is data in which the identification information of the fastener and the position information are associated with each other. The worker creates, for example, CSV format master data on the PC 6 and stores the created master data in the USB memory 5. A management system application is installed in the tablet PC 3 in advance. The worker turns on the tablet PC 3 and activates the management system application. Then, the control unit 31 of the tablet PC 3 causes the display unit 33 to display a menu screen.

  FIG. 6 is a diagram showing a menu screen. On the menu screen, buttons for “tightening work”, “read master data”, “output work result”, and “display work result” are displayed. When the operator operates (for example, taps) the “read master data” button, the control unit 31 displays, for example, a message “Please insert USB memory” (not shown). When the worker attaches the USB memory 5 to the external I / F unit 36 of the tablet PC 3, the control unit 31 starts reading master data from the USB memory 5, and writes the read master data to the work DB (FIG. 5). (See “Identification Information” and “Location Information”). At this time, all “work results” are set to “NG”, and “completion date” is blank. When the reading of the master data is completed, for example, the control unit 31 displays a message “Reading of the master data is completed” and an “OK” button (not shown). When the “OK” button is operated, the display returns to the menu screen. The worker ends the application and turns off the tablet PC 3.

  The worker brings the tablet PC 3 and the torque wrench 1 to the work place. When the worker arrives at the work place, the worker turns on the power to the tablet PC 3 and the torque wrench 1 and activates the application of the management system. Then, the control part 31 of tablet PC3 displays a menu screen. The worker pairs the wireless communication unit 35 of the tablet PC 3 and the wireless communication unit 14 of the torque wrench 1 to connect wireless communication by Bluetooth.

FIG. 7 is a flowchart showing the operation of the tablet PC 3. When the “tightening operation” button on the menu screen is operated, the control unit 31 executes the following processing.
<Step S01>
When the operator operates the “tightening operation” button, the control unit 31 displays a screen shown in FIG. 8 and determines whether or not the tightening operation is started. On this screen, a message “Do you want to start tightening work?” And a “start” button and a “return” button are displayed. When the “return” button is operated, the control unit 31 stops the process and returns to the display of the menu screen. When starting the tightening operation, the worker moves to the position of the protective cap for performing the tightening operation, and operates the “start” button on the screen shown in FIG. When the “start” button is operated (step S101: YES), the process of the control unit 31 proceeds to step S02.

<Step S02>
The control unit 31 displays the screen shown in FIG. 9 and receives position information (an example of position information receiving means). On this screen, a message “Please perform tightening work” and a “Cancel” button are displayed. When the “Cancel” button is operated, the control unit 31 stops the process and returns to the display of the menu screen. When performing the tightening operation, the worker inserts the head 13 of the torque wrench 1 into the tightening tool and performs tightening. As described above, the position information of the torque wrench 1 is transmitted to the tablet PC 3 at intervals of 1 second. If the position information is received, the process of the control unit 31 proceeds to step S03. As described above, when the torque reaches the specified value, a detection signal is transmitted from the torque wrench 1 to the tablet PC 3, but the timing at which the position information is transmitted and the timing at which the detection signal is transmitted are irrelevant. When receiving the detection signal (an example of a receiving unit), the control unit 31 holds a flag indicating reception of the detection signal in the RAM. If a plurality of fasteners are provided per protective cap, a detection signal is transmitted for each fastener, so the same number of flags as the number of fasteners per protective cap are stored in the RAM. Retained.

<Step S03>
The control unit 31 identifies a fastener that is within a predetermined distance from the torque wrench (an example of an identification unit). Specifically, the control unit 31 calculates the distance between the position indicated by the received position information and the position indicated by the position information of each fastener recorded in the work DB, and a range in which the calculated distance is determined. The fastener that is inside (for example, within 1 m) is extracted. The control unit 31 holds the extracted fastener identification information in the RAM.

<Step S04>
The control unit 31 receives position information. This position information is the position information transmitted 10 seconds after the position information received in step S02. If the position information is received, the process of the control unit 31 proceeds to step S05.

<Step S05>
As in step S03, the control unit 31 identifies a fastening tool whose distance from the torque wrench is within a determined range.

<Step S06>
The control unit 31 determines whether or not the fastening tool identified in step S03 and the fastening tool identified in step S05 are the same fastening tool based on the identification information. Specifically, if the torque wrench is located within 1 m from the same fastener for at least 10 seconds, it is determined that both are the same. When both are the same (step S06: YES), the process of the control unit 31 proceeds to step S07. When they are not the same (step S06: NO), the process of the control unit 31 returns to step S04.

<Step S07>
The control unit 31 determines whether or not the detection signal has been received. Specifically, when the flag indicating reception of the detection signal is held in the RAM, it is determined that the detection signal has been received (step S07: YES), and the processing of the control unit 31 proceeds to step S08. If the flag is not held in the RAM, it is determined that the detection signal has not been received (step S07: NO), and the determination in step S07 is repeated. When a plurality of fasteners are provided per protective cap, if the same number of flags as the number of fasteners per protective cap are held in the RAM, the detection signal has been received. If it is determined that the number of flags is less than the number of fasteners, it is determined that the detection signal has not been received.

<Step S08>
The control unit 31 records the work result in the work DB (an example of a recording unit). Specifically, the control unit 31 rewrites “work result” corresponding to the identification information of the fastening tool identified in step S05 to “OK”, and writes the date and time at this time in “completion date”. And the control part 31 displays the screen shown in FIG. On this screen, a message “Protection cap x tightening complete” (x is identification information) and a “Next” button are displayed. When the “next” button is operated, the process of the control unit 31 returns to step S01. When starting the tightening operation of the next protective cap, the worker moves to the position of the protective cap for performing the tightening operation, and operates the “start” button on the screen shown in FIG. The subsequent processing is as described above. On the other hand, when finishing the work, the worker operates the “return” button to return to the menu screen. When a plurality of fasteners are provided per protective cap, the work result for each fastener may be recorded in the work DB. Further, every time a detection signal is received, for example, a message “n th tightening completion” (n = 1, 2,...) May be displayed.

  FIG. 11 is a diagram illustrating a display example of work results. This screen is displayed when the “work result display” button on the menu screen is operated. On the screen, icons indicating the identification information of the fasteners are displayed side by side, the icon corresponding to the identification information of “OK” in the work DB is blue, and the icon corresponding to the identification information of “NG” is displayed. It is displayed with different colors such as yellow (an example of display means).

  According to this embodiment, it is possible to identify the fastening tool without performing an operation for identifying the fastening tool to be fastened with the torque wrench. In addition, since it is configured to confirm that the distance between the torque wrench and the fastener is within a predetermined range, it has been confirmed that it has continued for a predetermined period. Compared with the structure which does not carry out, the certainty of identification of a fastener can be improved.

<Modification>
The above embodiment may be modified as follows.
<Modification 1>
In the above-described embodiment, the example in which the position information of the torque wrench 1 is acquired to identify the fastener within the range in which the distance from the torque wrench 1 is determined has been described. You may identify. For example, an RFID tag storing the identification information of the fastener is attached to the protective cap, and the fastener is identified by reading the identification information from the RFID tag with a tag reader attached to the head 13 of the torque wrench 1. May be. In this case, the radio wave intensity of the tag reader is adjusted so that the communicable range between the RFID tag and the tag reader is 1 m, for example. According to this configuration, a fastening tool whose distance from the torque wrench 1 is within a determined range (within 1 m) is identified. In the case of a passive tag, since the communicable range is about several centimeters, it is not necessary to determine the distance between the torque wrench and the fastener.

<Modification 2>
FIG. 12 is a flowchart of a modification. In this example, steps S11 to S13 are added between step S07 and step S08 in the flowchart of the embodiment (see FIG. 7).
The contents of steps S11, S12, and S13 are the same as steps S04, S05, and S06, respectively. Specifically, when it is determined that the detection signal has been received (step S07: YES), the position information is received again to identify the fastener (steps S11 and S12). When it is the same as the fastening tool identified in step S05 (step S13: YES), the work result is recorded in the work DB (step S08). That is, in this configuration, when the state where the distance between the torque wrench and the fastening tool is within the determined range continues for the determined period or more and the detection signal is received by the receiving means within the period, The identification information indicating the fastener and the result indicated by the detection signal are displayed in association with each other (an example of display means). According to this configuration, after determining that the detection signal has been received, it is possible to improve the certainty of the identification of the fastener as compared with a configuration in which it is not confirmed that the fastener is the same.

<Modification 3>
Steps S04 to S06 in the flowchart (see FIG. 7) of the embodiment may be omitted. In other words, in this configuration, the detection signal transmitted by the transmission unit is received (an example of the reception unit), the fastening tool within the range in which the distance from the torque wrench is determined (an example of the identification unit), The identification information indicating the fastening tool identified by the identification means and the result indicated by the detection signal received by the reception means are displayed in association with each other (an example of display means).

<Modification 4>
In the above-described embodiment, the tablet PC is illustrated as an example of the display device, but the display device may be a notebook PC, a smartphone, or the like.
The management system application program may be provided by being recorded on a computer-readable recording medium such as an optical recording medium or a semiconductor memory, and the program may be read from the recording medium and installed in the information collecting apparatus. . In addition, this program may be provided through a telecommunication line.

DESCRIPTION OF SYMBOLS 1 Torque wrench, 11 Grasp part, 12 axis | shafts, 13 heads, 14 Wireless communication part, 15 Position information acquisition part, 16 Torque measurement part, 20 Data processing part, 21 Control part, 22 Storage part, 23 Display part, 24 Operation part 3 tablet PC, 31 control unit, 32 storage unit, 33 display unit, 34 operation unit, 35 wireless communication unit, 36 external I / F unit, 5 USB memory, 6 PC

Claims (6)

A specified torque detecting means for detecting that the torque when the fastener is tightened has reached a specified value;
A torque wrench comprising: a transmitting means for transmitting a detection signal to the outside when the specified torque detecting means detects that the torque has reached the specified value;
Receiving means for receiving the detection signal transmitted by the transmitting means;
An identification means for identifying a fastener having a distance from the torque wrench within a predetermined range;
A forgetting to prevent tightening system comprising: a display device including: identification information indicating the fastening tool identified by the identification means; and a display means for displaying the information indicated by the detection signal received by the receiving means in association with each other. The forgotten tightening prevention system according to claim 1, wherein the display means displays the identification information and the result in association with each other when the distance is within the determined range for a predetermined period or longer. . The display means includes the identification information when the state where the distance is within the determined range continues for the determined period or more and the detection signal is received by the receiving means within the period. The forgetful tightening prevention system according to claim 2, wherein the results are displayed in association with each other. The torque wrench is
Obtaining means for obtaining position information of the torque wrench;
Position information transmission means for transmitting the position information acquired by the acquisition means to the display device,
The display device has position information receiving means for receiving the position information transmitted by the position information transmitting means,
The identification means is a fastener whose distance from the torque wrench is within the determined range based on the position information received by the position information receiving means and the position information of the fastener stored in advance. The forgetful tightening prevention system according to any one of claims 1 to 3. The forgetful tightening prevention system according to any one of claims 1 to 4, wherein the display means displays identification information indicating a fastener whose torque has not reached the specified value. The forgetful tightening prevention system according to any one of claims 1 to 5, further comprising recording means for recording a completion time of a tightening operation by the torque wrench for each of the tightening tools.

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