JP2004118304A - Working situation management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working situation management system which can securely grasp a fact that not only a clamping work of bolt, nut and the like but also the working performed in a plurality of places such as riveting, thread fastening, spot welding and the like are appropriately completed with position information. <P>SOLUTION: The system is provided with an output means for outputting work completion information of the fact that the working is completed in accordance with completion of the working in a working position where the working using a tool is performed, a measuring means measuring the working position of pertinent work and a processing means specifying the place where the working is completed based on the work completion information and corresponding work position information. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a system for managing a work situation of a worker at a work site such as a construction site, a civil engineering site, and a factory.
[0002]
[Prior art]
BACKGROUND ART In a construction composed of a plurality of segments such as a steel structure, a bridge, a device assembly, a pipe, and the like, a fastening member such as a bolt or a nut is generally used as a means for connecting the segments. Since the work of tightening the bolts and the like is performed by the operator, the operator has to rely on the cautiousness of the operator to determine whether the tightening operation has been performed with the specified torque or whether the operator has forgotten the tightening operation.
[0003]
Therefore, there has been proposed a work situation management system capable of managing the tightening work of bolts and nuts using a torque wrench (see Patent Documents 1 and 2). In this system, when the bolt is tightened by manually operating the torque wrench, the torque detecting means is activated when the tightening torque reaches a predetermined value set in advance in the torque wrench itself, and the limit switch is turned on from off. The limit switch ON signal (torque detection signal) is transmitted to the management device by wire or wirelessly, and the management device counts the number of bolts tightened to the specified torque, preventing the tightening torque from becoming insufficient and forgetting to tighten. It performs management such as prevention.
[0004]
Further, in such a system, since the information managed by the management device does not include the position information of the bolts and nuts for which the tightening work has been completed, it is difficult to analyze the work, and another work condition management is performed. A system has been proposed (see Patent Document 3). This system reads the bar code attached to the flange pipe to obtain the position information of the bolt for performing the tightening work, and the torque detection signal generated by performing the tightening work with this position information and the specified torque. Is transmitted to the management device, and based on these, the tightening work completion portion is displayed by a diagonal line or a change in display color on the drawing of the entire configuration of the flange pipe displayed on the CRT of the management device.
[0005]
[Patent Document 1]
JP-A-8-216045 [Patent Document 2]
Japanese Patent Application Laid-Open No. 2000-108048 [Patent Document 3]
JP-A-7-105469
[Problems to be solved by the invention]
However, in the latter system, in order to obtain positional information of bolts and nuts for tightening work or positional information of bolts and nuts for which tightening work has been completed, a bar code related to the positional information is previously provided to the flange pipe (segment to be fastened). It is necessary to attach the bar code and the like, and this operation is not only complicated, but also a mistake may occur that an unsupported bar code or the like is erroneously attached.
[0007]
Therefore, the present invention has been made in view of the above-described problems, and is not limited to the work of tightening bolts and nuts, but the work performed at a plurality of places such as riveting, screwing, spot welding, etc. It is an object of the present invention to provide a work situation management system capable of surely grasping the fact that the task has been properly completed at a location together with its position information.
[0008]
[Means for Solving the Problems]
In order to solve the above problem, the work situation management system according to the present invention includes an output unit that outputs work completion information indicating that the work has been completed according to the completion of the work at a work position where the work using the tool is performed. And a processing means for specifying a work completion location based on the work completion information and the corresponding work position information.
[0009]
According to the work status management system having the above-described configuration, when the worker completes the work using the tool, the work completion information is output from the tool, for example. The side position means positions the position of the tool, that is, the work position of the work, and thereby links the work completion information and the work position information. The processing means is means for making the result visible to an operator or the like.
[0010]
Further, the work situation management system according to the present invention is configured such that the output means includes a transmission means provided in the tool and wirelessly or wiredly transmitting a work completion signal generated when the work is completed as work completion information. Can be adopted.
[0011]
In the work situation management system according to the present invention, when the work is a tightening work of a bolt or the like, the output means is provided on a tool including a torque wrench, and a torque detection generated by tightening to a preset torque value is provided. A configuration in which a signal is transmitted wirelessly or by wire as a work completion signal is employed. According to this configuration, when the torque wrench is manually operated to tighten the bolts and the like, the torque detecting means operates when the tightening torque reaches a torque value set in advance in the torque wrench itself, and the torque detection signal is generated. It is transmitted by wire or wirelessly.
[0012]
Further, in the work situation management system according to the present invention, the side means may include a receiving means for receiving a work completion signal wirelessly transmitted from the transmitting means, and a propagation time of the work completion signal from the transmitting means to the receiving means. And a coordinate value calculating means for calculating the absolute coordinate value of the work position based on the propagation time, the known propagation speed of the work completion signal, and the known absolute coordinate value of the receiving means. Can be adopted.
[0013]
According to such a configuration, the time difference (propagation time) between the time when the work completion signal is transmitted from the transmission means of the output means and the time when the work completion signal is received by the receiving means of the side means, and the known radio wave or The absolute coordinate value of the work position is calculated from the propagation speed of the work completion signal composed of the ultrasonic wave and the known absolute coordinate value of the receiving means, and the work position is positioned.
[0014]
In the work situation management system according to the present invention, when the work position in the three-dimensional space is located on the side, the receiving means is arranged at at least three places. If it is a one-dimensional space, the receiving means is one place, if it is a two-dimensional space, the receiving means is two places, if it is a three-dimensional space, the receiving means may be three places. In the case of lateral positioning, if the receiving means is arranged in more than three places, the lateral precision can be improved.
[0015]
Further, in the work situation management system according to the present invention, the side position means includes: a transmission unit for transmitting a side position signal; a reception unit for receiving the side position signal; and a side position from the transmission unit to the reception unit. Time calculating means for calculating the propagation time of the working signal, and coordinates for calculating the absolute coordinate value of the working position based on the propagation time, the known propagation speed of the lateral position signal and the known absolute coordinate value of the transmitting means. A configuration including a value calculation unit can be adopted.
[0016]
Such a configuration can be embodied in the following three patterns. {Circle around (1)} The transmitting means is provided on the tool, while the receiving means is formed separately from the tool. {Circle over (2)} The transmitting means and the receiving means are both provided on the tool, and the receiving means receives the side position signal from the transmitting means reflected by the reflecting member formed separately from the tool. {Circle around (3)} The transmitting means is formed separately from the tool, while the receiving means is provided on the tool.
[0017]
In the work situation management system according to the present invention, in the case of the pattern (3), at least the receiving means of the output means and the side position means may be provided with a tool. . According to this configuration, the internally output work completion information and the corresponding work position information (when the tool also includes the time calculation unit and the coordinate value calculation unit) or the reception information of the receiving unit that forms the basis thereof ( (When the tool does not have the time calculating means and the coordinate value calculating means) can be stored in the storage means provided in the tool.
[0018]
Further, the work situation management system according to the present invention employs a configuration in which the processing means includes a display means for displaying a CAD drawing of a work site, and displays a work completion location on the displayed CAD drawing. be able to.
[0019]
In the work situation management system according to the present invention, when the coordinate system according to the CAD drawing coincides with the coordinate system according to the work site, the processing unit determines the absolute coordinate value of the work object on the CAD drawing and the side coordinate value. It is possible to adopt a configuration in which the absolute coordinate value of the work position calculated by the position means is compared with the work position to identify the work completion position on the CAD drawing.
[0020]
According to these configurations, the work position at which the work is completed is displayed on the display means (for example, a CRT) on which the CAD drawing of the work site is displayed, so that the work progress at the work site can be accurately grasped. it can.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a work situation management system according to the present invention will be described with reference to the drawings.
[0022]
As shown in FIG. 1, the work situation management system according to the present embodiment includes a torque wrench 10 used for bolting work at a work site B, a transceiver 20, and CAD software capable of handling CAD drawings of the work site B. And a personal computer unit 30.
[0023]
As shown in FIG. 2, the torque wrench 10 includes a clock unit 11, a specified torque value detection unit 12, and a transmission unit 13. Specifically, when the torque reaches a specified torque value, the contact switch circuit is turned on, and the torque wrench includes a transmitter that transmits a torque detection signal. The torque detection signal is a signal (operation completion signal) that includes the transmitted time information obtained from the clock means 11. The transmitter is arranged near the nut portion (tightening portion) of the torque wrench 10 so as to minimize the distance between the transmitter and the nut portion.
[0024]
The transceiver 20 includes a clock unit 21 whose time matches the clock unit 11 of the torque wrench 10, and a transmission / reception unit 22. Specifically, it is a transceiver that receives a torque detection signal from the torque wrench 10 and transmits a reception notification signal. The reception notification signal is a signal that includes the time information at which the torque detection signal was received from the clock unit 21.
[0025]
The transceivers 20 constitute a part of the lateral position means according to the present invention, and are arranged at three positions to position the work position b in the three-dimensional space. However, depending on the work position b, a construction (steel frame material C in the present embodiment) is interposed between the transceiver 20 and the transceiver 20, and the straightness of the radio wave from the transmission unit 13 of the torque wrench 10 is hindered. It could be. In this case, the reception notification signal from the transceiver 20 may have a time difference when the torque detection signal is received, and is inappropriate as data for calculating a coordinate value described later. Therefore, in order to eliminate such a situation, it is preferable from the viewpoint of improving the lateral accuracy that the transceivers 20 are arranged as many as possible so that an appropriate reception notification signal can be selectively obtained.
[0026]
The personal computer unit 30 includes a receiving unit 31, a time calculating unit 32, a coordinate value calculating unit 33, a display unit 34 including a CRT, a CAD drawing data processing unit 35, and a display control unit 36. .
[0027]
The receiving means 31 comprises a receiver capable of receiving a torque detection signal from the transmitting means 13 of the torque wrench 10 and a reception notification signal from each of the transmitting and receiving means 22 of at least three or more locations. Externally attached to the computer. The time calculation means 32 calculates the time difference between the two (the propagation time of the torque detection signal from the transmission means 13 of the torque wrench 10 to the transmission / reception means 22 of the transceiver 20) from the time information respectively included in the torque detection signal and the reception notification signal. calculate. The coordinate value calculating means 33 transmits the absolute coordinate value of the work position b, more precisely, the transmission of the torque wrench 10 from the time difference, the propagation speed of the torque detection signal composed of radio waves or ultrasonic waves, and the absolute coordinate value of the transceiver 20. The absolute coordinate value of the means 13 is calculated.
[0028]
To describe the side position method of the working position b in more detail,
{Circle around (1)} Assuming that exactly the same time is recorded between the torque wrench 10 (transmitting side) and the transceiver 20 (receiving side) at the working position b, the time when the torque wrench 10 is present (t0) If the time t0 is transmitted on a radio wave and transmitted as a torque detection signal, and the transceiver receives the signal at the time t1, the propagation time t [second] becomes
t = t1-t0 (formula 1)
Is determined by
(2) Since distance = time × speed, the time required for the torque detection signal to propagate is the above-described t [second], and if the speed at which the radio wave is transmitted is C [m / second], the work position The distance d [m] between b and the transceiver 20 is
d = t × C (Equation 2)
Is determined by
{Circle around (3)} Considering a coordinate system in which a predetermined location of the work site B is the origin, that is, (x, y, z) = (0, 0, 0), the coordinates of the work position b are (X, Y, Z). If the coordinates of the transceiver 20 are (x, y, z), the relationship is
(X−X) ＾ 2 + (y−Y) ＾ 2 + (z−Z) ＾ 2 = d ＾ 2 (Equation 3)
It becomes.
{Circle around (4)} n (n = 3 in the present embodiment) transceivers 20,... Are arranged at predetermined fixed points in the coordinate system, respectively (xn, yn, zn) (n ≧ 3), and assuming that the distance between the transceiver 20 and the work position b is dn, Expression 3 is satisfied by the number of n. By solving these simultaneous equations, (X, Y, Z), that is, the absolute coordinate value of the work position b is obtained.
[0029]
The CAD drawing data processing means 35 specifies, from the CAD drawing data, a bolt / nut (work target) having the same or the closest coordinate value to the absolute coordinate value of the obtained work position b. . As a premise, the coordinate system of the CAD drawing of the work site B needs to be the same as the coordinate system set above (however, even if the two coordinate systems do not match, it is necessary to use a conversion tool that matches the coordinate system). The actual coordinate values that have been placed may be compared with the coordinate values in the CAD drawing data.) The display control means 36 edits the CAD drawing data at the specified work completion point (the work object tightened with the specified torque value) and, for example, as shown in FIG. A process of performing hatching or the like to visually and clearly identify the other bolt / nut templates is performed on the template.
[0030]
As described above, according to the work status management system according to the present embodiment, since the work completion part can be specified by the side position means, it is necessary to obtain the work position information as in the conventional system. This eliminates the need for complicated and unreliable preparation work such as pasting a bar code or the like relating to position information to a work object in advance, or reading work of a bar code, etc., thus making it possible to perform work without imposing an extra burden on the worker. Efficiency can be improved.
[0031]
In addition, since the work completion location is displayed on the CAD drawing of the CRT or printed out so that the worker can grasp the progress of the work, the quality of the construction can be controlled. Also, it can be a material that guarantees the quality of the construction for the delivery destination (customer) of the construction.
[0032]
Note that the work situation management system according to the present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the present invention.
[0033]
For example, in the above-described embodiment, a torque wrench is illustrated as a tool, but the present invention is not limited to this, and may be applied to other work tools such as a riveter, an electric screwdriver, and a spot welding machine. In the case of a riveter, a means capable of detecting the spindle when the rivet pin is broken is provided, and this means detects the spindle so that a work completion signal is output. The work completion signal is output when the rotation torque changes due to the completion of the tightening, or the work completion signal is output when the current value changes due to the completion of welding in the case of a spot welding machine. be able to. Further, even with a torque wrench, the means for generating the torque detection signal (work completion signal) is not limited to the above embodiment.
[0034]
Further, in the above embodiment, the plurality of transceivers 20,... Are installed at fixed points in a predetermined coordinate system. However, regardless of such a method, for example, the transmission function of the transceiver 20 and the Using the receiving function, the positions of the transceivers 20 may be positioned side by side by the above-described side position method.
[0035]
Further, in the above embodiment, the time calculating means 32 and the coordinate value calculating means 33 which are a part of the lateral position means are provided on the personal computer unit 30 side. The function of calculating the distance between each transceiver 20 and the work position b of the means 33 may be provided in each transceiver 20. In this case, the transceiver 20 transmits the calculation result of the distance from itself to the work position b to the receiving means 31 of the personal computer unit 30.
[0036]
In the above embodiment, the side position of the work position b is determined based on the torque detection signal (work completion signal: side position signal). The position of the work position b may be determined based on the use signal.
[0037]
Further, in the above embodiment, while the transmitting means for the lateral position is provided in the tool, the receiving means for the lateral position is provided in the transceiver, but the present invention is not limited to this. The tool is provided separately from the tool (for example, transmitters (absolute coordinate values are known at least at three or more places) or at least three or more GPS satellites), while the tool is provided with receiving means for lateral position. Alternatively, the transmitting position and the receiving unit for the lateral position are provided on the tool, and a reflecting member (of which the absolute coordinate value is known) that reflects the signal for the lateral position is arranged at least at, for example, at least three places, so that the working position is adjusted. Can be sideways. In any case, by providing a storage means in the tool or a recording means capable of writing on a recording medium, it is possible to internally store the work completion information and the corresponding work position information and the like, or to store the work completion information and the like in the medium. It becomes possible.
[0038]
Further, in the above embodiment, the CAD drawing is used as a work progress management tool. However, the work completion location information may be output as a form independently or in combination with the CAD drawing. Good.
[0039]
Further, in the above-described embodiment, the results are displayed side by side for each work position, that is, for each fastening object. However, as shown in FIG. In some cases, it may be difficult to accurately specify each work position. In this case, the work position group is formed into one area, and a counting means for counting the number of work completion signals in the area is provided. May match each other, the system may recognize that the work in the area has been completed.
[0040]
【The invention's effect】
As described above, according to the present invention, since the work position is located at the side, it is possible to reliably grasp the fact that the work performed at a plurality of places is properly completed at each place together with the position information. it can. Further, according to the present invention, since a defective work location can be easily specified, work analysis is facilitated, and a construction error can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a work situation management system according to an embodiment of the present invention is arranged at a work site.
FIG. 2 shows a block diagram of a work situation management system according to the embodiment.
FIG. 3 shows a screen of a display unit for displaying a CAD drawing on which a work situation according to the embodiment is displayed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... torque wrench, 11 ... clock means, 12 ... specified torque value detection means, 13 ... transmission means, 20 ... receiver / transmitter, 21 ... clock means, 22 ... transmission / reception means, 30 ... personal computer unit, 31 ... reception means, 32 time calculation means 33 coordinate value calculation means 34 display means 35 CAD data processing means 36 display control means B work site b work position

Claims (9)

Output means for outputting work completion information indicating that the work has been completed in response to the completion of the work at the work position where the work using the tool is performed, side position means for positioning the work position of the work, and work completion information And a processing means for specifying a work completion location based on the corresponding work position information. 2. The work status management system according to claim 1, wherein the output unit includes a transmission unit provided on the tool and transmitting a work completion signal generated when the work is completed, as work completion information, wirelessly or by wire. The work according to claim 2, wherein the output means is provided on a tool formed of a torque wrench, and wirelessly or wiredly transmits a torque detection signal generated by tightening to a preset torque value as a work completion signal. Situation management system. The side position means, receiving means for receiving a work completion signal transmitted from the transmitting means by wireless, time calculating means for calculating the propagation time of the work completion signal from the transmitting means to the receiving means, the propagation time, 4. The work situation management according to claim 2, further comprising coordinate value calculating means for calculating the absolute coordinate value of the work position based on the known propagation speed of the work completion signal and the known absolute coordinate value of the receiving means. system. 5. The work situation management system according to claim 4, wherein said receiving means is arranged at at least three places. The side position means, transmitting means for transmitting the side position signal, receiving means for receiving the side position signal, time calculation means for calculating the propagation time of the side position signal from the transmission means to the receiving means, And a coordinate value calculating means for calculating an absolute coordinate value of a work position based on the propagation time, a known propagation speed of the side signal, and a known absolute coordinate value of the transmitting means. Work status management system. 7. The work status management system according to claim 6, wherein at least one of the output unit and the side position unit is provided on a tool. The work status management system according to claim 1, wherein the processing unit includes a display unit that displays a CAD drawing of the work site, and displays a work completion location on the displayed CAD drawing. The absolute coordinate system according to the CAD drawing coincides with the coordinate system according to the work site, and the processing means determines the absolute coordinate value of the work target on the CAD drawing and the work position calculated by the lateral position means. 9. The work status management system according to claim 8, wherein a work completion location on the CAD drawing is specified by collating with an absolute coordinate value.

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