JP2008272838A - Fastening negligence prevention device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a fastening negligence prevention device capable of preventing fastening negligence of a member to be fastened. <P>SOLUTION: When the prescribed number of members to be fastened is fastened by the prescribed number of times, whether the members to be fastened are fastened by the prescribed number of times or not is checked in this fastening negligence prevention device. A torque sensor 21 puts out a signal when a torque at the time of fastening the members to be fastened reaches a torque upon the completion of fastening, and an angle sensor 22 puts out a signal when a rotational angle at the time of fastening the members to be fastened reaches a predetermined angle. When the signal of the torque sensor 21 is earlier than that of the angle sensor 22, a CPU 31 judges that there is re-fastened overlapped fastening. When there is the overlapped fastening, a buzzer 4 informs that there is a member left in an incomplete fastening condition. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fastening forgetting prevention device that prevents forgetting to fasten a fastened member in, for example, a product assembly operation.

  The conventional fastening forget prevention device sets the number of fastening members necessary for product assembly in advance, and tightens when the fastening member is tightened with a predetermined torque in conjunction with the operation of the fastening tool. A completion signal is generated. Then, it is configured to notify the operator of the completion of the tightening operation or abnormality such as tightening depending on whether or not the number of tightening points obtained by detecting and counting the generated tightening completion signal matches the set point number. ing.

  As a conventional forgetting fastening prevention device, for example, as in Patent Document 1, an operation for instructing assembly of a product composed of a plurality of parts according to a procedure by screwing a predetermined type of screw into a predetermined position of the plurality of parts. In the pointing device, a control unit having storage means for storing work information in which types of screws to be used in accordance with a product assembling procedure, installation positions, and necessary numbers are registered, and work instruction information in which the work information is registered for each of a plurality of products And a screw supply unit that stores a plurality of types of screws and discharges the types of screws based on the work information corresponding to the product specified by the instruction of the control unit to the tray, and the control unit performs assembly Work information consisting of the type, installation position, and required number of screws of the product is displayed to the worker, and the screw supply unit is instructed to eject the required number of screws. There was a thing.

  In addition, as another conventional forgetting fastening prevention device, as in Patent Document 2, a workpiece mounting table capable of outputting a signal indicating whether or not a workpiece to be screwed is loaded, and a removal signal can be output every time a screw is removed. A screw supply device, an electric driver capable of outputting a screw tightening signal when the screw tightening operation is completed, and the signals from the workpiece mounting table, the screw feeder and the electric screwdriver are input, Some have a control device that can set the number of fastenings.

JP 2000-47705 A (paragraph 0006) Japanese Patent Laid-Open No. 3-19777 (Means for Solving the Problems)

  Conventional fastening forgetting prevention devices are configured as described above, and some devices can count the number of tightening of fastened members. However, in order for workers to assemble products efficiently, they must be fastened in place on the product in advance. After a member is temporarily tightened by hand, it is often tightened to a predetermined torque using a fastening tool. As a work mistake at this time, a temporarily tightened member and a tightened member to be tightened during a tightening operation at a predetermined torque. May be unable to be visually confirmed, and the operator may accidentally fasten the fastened members that have already been tightened. In conventional fastening forget prevention devices, the operator may accidentally tighten with the specified torque. When the fastened members that have completed the above are repeatedly fastened, the tightening is counted, and it may be recognized that a plurality of fastened members are fastened despite the same fastened member. For this reason, the conventional forgetting-to-fasten device erroneously recognizes that the predetermined number of tightening points of the fastened member has been reached even though the fastened member that should originally be fastened to the product with the predetermined torque remains. As a result, there has been a problem that forgetting to fasten the fastened member occurs.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a forgetting-fastening device capable of preventing forgetting to fasten a member to be fastened.

  The forgetting to prevent fastening device according to the present invention is a forgetting to prevent fastening device that checks whether or not a predetermined number of fastened members have been fastened when a predetermined number of fastened members are fastened by the predetermined number of times. A torque sensor that emits a signal when the torque when fastening the fastening member reaches the torque when the fastening is completed, and a signal when the rotation angle when fastening the fastening member reaches a predetermined angle In the processing unit and the processing unit, which determines that the fastening member once fastened is re-fastened when the emitted angle sensor and the signal inputted from the torque sensor are earlier than the signal inputted from the angle sensor. When it determines that it is overlapped fastening, the alerting | reporting part which alert | reports that the to-be-fastened member which fastening is not completed remains is provided.

  According to the present invention, there is an effect that forgetting to fasten the fastened member can be prevented.

An embodiment of the present invention will be described below.
Embodiment 1 FIG.
FIG. 1 is a configuration diagram of a forgetting-fastening device according to Embodiment 1 and Embodiment 2 of the present invention.
The present invention relates to a fastening forgetting prevention device that fastens a predetermined number of members to be fastened a predetermined number of times and checks whether the fastening of the members to be fastened has been completed. Use a fastening tool (eg, wrench, screwdriver, etc.) to detect whether a predetermined number of members to be fastened (eg, screws, bolts, nuts, etc.) have been tightened with a predetermined torque, and prevent forgetting to fasten the members to be fastened. To do.

As shown in FIG. 1, the forgetting-fastening device includes a touch panel 1 (display unit), a fastening tool 2, a control unit 3, and a buzzer 4 (notification unit).
The fastening tool 2 includes a torque sensor 21 and an angle sensor 22, and the control unit 3 includes a CPU 31 (processing unit), an I / O interface 32, and a storage unit 33.

  The touch panel 1 allows an operator to input the number of tightening points of a member to be fastened necessary for product assembly in advance, displays the input number of tightening, and fastens the member to be fastened with a predetermined torque with the fastening tool 2 during operation. The number of tightening completions is also displayed. The number of fastenings input on the touch panel 1 is transmitted to the CPU 31 via the I / O interface 32.

The torque sensor 21 generates a signal when the tightening torque M for fastening the fastened member reaches the predetermined torque Mf when the fastening is completed, and the angle sensor 22 starts detecting the fastening angle θ from the start of fastening of the fastened member. When the tightening angle reaches a predetermined angle Δθf (for example, Δθf = 5 °), a signal is generated.
Signals output from the torque sensor 21 and the angle sensor 22 are transmitted to the CPU 31 via the I / O interface 32 in the control unit 3.

The I / O interface 32 is an input / output interface that outputs information input from the touch panel 1, the torque sensor 21, the angle sensor 22, and the like to the CPU 31 and the like.
Based on the information from the storage unit 33 that records information on the member to be fastened inputted on the touch panel 1 and the signals from the torque sensor 21 and the angle sensor 22, the CPU 31 determines the judgment result of normal fastening or double fastening. It transmits to the buzzer 4 and the touch panel 1 via the I / O interface 32.
Here, normal fastening refers to when a fastened member that has not been tightened is tightened, and overlapped fastening refers to when a fastened member that has already been tightened is fastened.

  When the signal input from the torque sensor 21 is later than the signal input from the angle sensor 22, the CPU 31 determines that the engagement is normal and the signal input from the torque sensor 21 is a signal input from the angle sensor 22. If it is earlier than this, it is determined that the fastened fastening is the fastened fastening member once fastened.

FIG. 2 is a diagram showing the relationship between the tightening angle and the tightening torque in the first embodiment.
The determination of normal fastening and overlapping fastening of the CPU 31 using an angle as shown in FIG.
Predetermined angle Δθf <angle Δθ1 when a predetermined tightening torque Mf is reached
When it becomes, it judges that it is a normal conclusion,
Predetermined angle Δθf> An angle Δθ2 when the predetermined tightening torque Mf is reached
When it becomes, it is determined that it is a double conclusion.

  The storage unit 33 stores information on the number of tightening points from the CPU 31, and the buzzer 4 notifies the operator of a normal fastening and an overlapping fastening for each place to be fastened with different sounds.

Next, the operation will be described.
FIG. 3 is a flowchart about the operation of the fastening operation in the first embodiment.
In ST101, first, the operator uses the touch panel 1 to input the number of tightened members required for product assembly as product assembly information. Further, the touch panel 1 displays the number of completed fastenings of the fastened member on the screen, and displays “0” as an initial value.

  In ST102, the operator fits the fastening tool 2 to the fastened member to be fastened in accordance with the process order, and sequentially tightens the fastened member. In ST103, if the CPU 31 does not input from the torque sensor 21 a signal indicating that the predetermined torque Mf has been reached, the CPU 31 determines that the fastening has not been completed. In ST105, the CPU 31 performs the fastening from the angle sensor 22. If a signal indicating that the predetermined angle Δθf has been reached in the process of rotating the tool is not input, it is determined that the predetermined angle Δθf has not been reached.

  In ST105, the CPU 31 outputs a signal that the predetermined angle Δθf has been reached in the process of rotating the fastening tool from the angle sensor 22 before inputting the signal indicating that the predetermined torque Mf has been reached from the torque sensor 21. In step ST106, when the CPU 31 receives from the torque sensor 21 a signal indicating that the torque 31 has reached the predetermined torque Mf, the CPU 31 determines that the engagement is normal. In ST107, the CPU 31 transmits a signal indicating normal fastening to the buzzer 4 and the touch panel 1, and the buzzer 4 receiving the normal fastening signal emits a normal fastening sound to notify the worker and receives a normal fastening signal. The touch panel 1 adds 1 to the display of the number of tightening completions and counts it.

  In ST103, before inputting the signal that the predetermined angle Δθf is reached in the process of rotating the fastening tool from the angle sensor 22, the CPU 31 sends a signal that the predetermined torque Mf when the fastening is completed is received from the torque sensor 21. If it is input, it is determined that it is overlapped fastening, and in ST104, the CPU 31 sends a signal to the buzzer 4 that it is overlapped fastening, and the buzzer 4 that has received the signal of overlapping fastening emits a sound that is different in tone from the normal fastening and performs the overlapping fastening. Notify workers.

  In ST108, the fastening forgetting prevention apparatus repeats the above-described process sequence, counts the number of tightened members to be fastened, and terminates the operator when the number matches the predetermined number of fastened members.

  In the fastening forgetting prevention device configured as described above, the CPU 31 detects the order of signals generated from the torque sensor 21 and the angle sensor 22 in the process of sequentially fastening the fastened members with the fastening tool 2, that is, the CPU 31 When the tightening torque reaches the predetermined torque Mf before the tightening angle of the member to be fastened reaches the predetermined angle Δθf, it is determined that the fastening is overlapped, and after reaching the predetermined angle Δθf, the tightening torque reaches the predetermined torque Mf. Sometimes it can be determined that the connection is normal.

  As described above, according to the first embodiment, when fastening a predetermined number of fastened members by a predetermined number of times, in the fastening forgetting prevention device that checks whether the fastened member has been fastened a predetermined number of times, When the torque at the time of fastening the member to be fastened reaches the torque when the fastening is completed, and when the rotation angle at the time of fastening the member to be fastened reaches a predetermined angle The angle sensor 22 that emits a signal, and the CPU 31 that determines that the fastened fastening member once fastened is a fastened fastening when the signal inputted from the torque sensor 21 is earlier than the signal inputted from the angle sensor 22. When the CPU 31 determines that the fastening is overlapped, the buzzer 4 is used to notify that the fastened member that has not been fastened remains, thereby tightening the fastened member. An effect that les can be prevented.

  In addition, according to the first embodiment, it is possible to eliminate the mismatch between the count value of the fastening completion signal of the fastened member and the preset number of fastening points of the fastened member, and it is possible to prevent forgetting to fasten. .

  Further, according to the first embodiment, it is possible to recognize that the overlapped fastening is notified by the buzzer 4 so that the worker can recognize that the tightened member to be tightened has been tightened again. .

Embodiment 2. FIG.
FIG. 1 is a configuration diagram of a forgetting-fastening device according to Embodiment 1 and Embodiment 2 of the present invention.
The forgetting to prevent fastening device of the second embodiment has the same configuration as the forgetting to prevent fastening device of the first embodiment.
In the first embodiment, the torque sensor 21 issues a signal when the tightening torque of the member to be fastened reaches the predetermined torque Mf, and starts detecting the tightening angle from the start of tightening of the member to be fastened. The predetermined angle Δθf When reaching (for example, Δθf = 5 °), the angle sensor 22 generates a signal.
On the other hand, in the second embodiment, as shown in FIG. 4, the torque sensor 21 has a predetermined torque (a confirmation torque Mc and a predetermined tightening torque Mf in the second embodiment). A half of the tightening torque) and a predetermined torque Mf when the fastening is completed, a signal is issued, and the angle sensor 22 confirms that the rotational angle when the fastened member is fastened is predetermined from the torque sensor 21. A signal is generated when a predetermined angle Δθf is rotated from when a signal generated when the torque Mc is reached, and the CPU 31 receives a signal input from the torque sensor 21 based on a signal input from the angle sensor 22. However, if it is late, it is determined that the engagement is normal, and if the signal input from the torque sensor 21 is earlier than the signal input from the angle sensor 22, the engagement is once applied. It is determined that the overlapping concluded that entered into a binding member again.

FIG. 4 is a diagram showing the relationship between the tightening angle and the tightening torque in the second embodiment.
The determination of normal fastening and overlapping fastening of the CPU 31 using angles as shown in FIG.
When the predetermined angle Δθf <the angle Δθ1 from when the confirmation torque Mc signal is received until the predetermined torque Mf is reached,
Judging that it is successful,
When the predetermined angle Δθf> the angle Δθ2 from when the signal of the confirmation torque Mc is received until the predetermined torque Mf is reached,
Judgment of duplicate conclusion.

Next, the operation will be described.
FIG. 5 is a flowchart of the operation of the fastening work in the second embodiment.
In ST201, first, the operator uses the touch panel 1 to input the number of tightened members to be fastened necessary for product assembly as product assembly information. Further, the touch panel 1 displays the number of completed fastenings of the fastened member on the screen, and displays “0” as an initial value.

  In ST202, the operator fits the fastening tool to the fastened member to be fastened in accordance with the process order, and sequentially tightens the fastened member. In ST203, the CPU 31 determines whether or not a signal indicating that the confirmation torque Mc has been reached from the torque sensor 21 is input, and if a signal is input, proceeds to ST204.

  In ST204, the angle sensor 22 inputs a signal indicating that the confirmation torque Mc has been reached from the CPU 31, and then starts detecting the tightening angle. In ST205, the CPU 31 determines that the fastening has not been completed when the signal indicating that the predetermined torque Mf when the fastening has been completed is not input from the torque sensor 21, and the CPU 31 performs the fastening from the angle sensor 22 in ST207. If a signal indicating that the predetermined angle Δθf has been reached in the process of rotating the tool is not input, it is determined that the predetermined angle Δθf has not been reached.

  In ST207, the CPU 31 outputs a signal that the predetermined angle Δθf has been reached in the process of rotating the fastening tool from the angle sensor 22 before inputting the signal indicating that the predetermined torque Mf has been reached from the torque sensor 21. In step ST208, if the CPU 31 inputs a signal indicating that the torque 31 has reached the predetermined torque Mf when the engagement is completed, the CPU 31 determines that the engagement is normal. In ST209, the CPU 31 transmits a signal indicating normal fastening to the buzzer 4 and the touch panel 1, and the buzzer 4 receiving the normal fastening signal emits a normal fastening sound to notify the worker and receives a normal fastening signal. The touch panel 1 adds 1 to the display of the number of tightening completions and counts it.

  In ST205, before inputting the signal that the predetermined angle Δθf is reached in the process of rotating the fastening tool from the angle sensor 22, the CPU 31 sends a signal that the predetermined torque Mf when the fastening is completed is received from the torque sensor 21. If it is input, it is determined that it is overlapped fastening, and in ST206, the CPU 31 sends a signal to the buzzer 4 that it is overlapped fastening. Notify workers.

  In ST210, the forgetting-fastening device repeats the above-described process sequence, counts the number of tightened members to be fastened, and terminates the operator when the number matches the predetermined number of fastened members.

  In the first embodiment, the fastening tool 2 is manually turned or dropped from the completion of the fastening of the fastened member in the previous step until the fastening of the next fastened member is started, or the fastening tool 2 is fastened to the fastened member. If the fitting tool cannot be fitted properly and the fitting is performed again, etc., the fastening tool rotates to a predetermined angle Δθf and the signal of the angle sensor 22 is emitted before fitting the fastened member. Even if the completed fastened member is fastened again with the predetermined torque Mf, there is a possibility that overlapping fastening cannot be detected.

  Accordingly, in the fastening forgetting prevention device configured as described above, the fastening tool rotates until the fastening of the fastened member starts by starting detection of the predetermined angle Δθf from the confirmation torque Mc which is the torque during fastening. It is possible to prevent the signal from the angle sensor 22 from being emitted. Further, the same effect as that of the first embodiment can be obtained even when the detection of the predetermined angle Δθf is started from the confirmation torque Mc.

  As described above, according to the second embodiment, in a forgetting fastening preventing apparatus that fastens a predetermined number of fastened members a predetermined number of times and checks whether fastening of the fastened member is completed, The torque sensor 21 that emits a signal when the torque at the time of fastening reaches the predetermined torque and the torque when the fastening is completed, and the rotation angle at the time of fastening the member to be fastened are determined in advance from the torque sensor 21. An angle sensor 22 that emits a signal when a predetermined angle is rotated from when a signal that is generated when a predetermined torque is reached and a signal that is input from the torque sensor 21 are compared to a signal that is input from the angle sensor 22 However, when it is early, the CPU 31 determines that the fastening member once fastened is the double fastening that is fastened again, and the CPU 31 completes the fastening when the CPU 31 determines that the fastening is double fastening. By and a buzzer 4 for informing that the remaining workpieces which not an effect that it is possible to prevent forgetting to fasten the workpieces.

Embodiment 3 FIG.
FIG. 6 is a configuration diagram of the forgetting-fastening device according to Embodiments 3, 4 and 5 of the present invention.
As shown in FIG. 6, the forgetful fastening prevention device of the third embodiment includes a touch panel 1, a fastening tool 2, a control unit 3, a buzzer 4, and a timer 5.
The fastening tool 2 includes a torque sensor 21, and the control unit 3 includes a CPU 31, an I / O interface 32, and a storage unit 33.

  In the third embodiment, a timer 5 is provided instead of providing the angle sensor 22 in the second embodiment. The CPU 31 first starts the timer 5 (for example, the timer 5) after reaching the confirmation torque Mc in the process of tightening the fastened member. The countdown period Δtf is set to 2 to 10 seconds), and the signal input from the torque sensor 21 is input when the signal input from the torque sensor 21 reaches a predetermined torque. If it is earlier than the passage of time at a predetermined time from the time, it is determined that the fastening member once fastened is overlapped fastening again. The timer 5 is connected to the I / O interface 32 and transmits a time signal to the CPU 31 via the I / O interface 32. Other configurations are the same as those of the first and second embodiments.

FIG. 7 is a diagram showing the relationship between time and tightening torque in the third embodiment.
The determination of normal fastening and overlapping fastening of the CPU 31 using an angle as shown in FIG.
Timer countdown period Δtf <Time from receiving the signal of the confirmation torque Mc until reaching the predetermined tightening torque Mf Δt1
When it becomes, it judges that it is a normal conclusion,
Timer count-down period Δtf> Time Δt2 from when the confirmation torque Mc signal is received until the predetermined tightening torque Mf is reached
When it becomes, it is determined that it is a double conclusion.

Next, the operation will be described.
FIG. 8 is a flowchart of the fastening operation in the third embodiment.
In ST301, first, the operator uses the touch panel 1 to input the number of tightened members to be fastened necessary for product assembly as product assembly information. Further, the touch panel 1 displays the number of completed fastenings of the fastened member on the screen, and displays “0” as an initial value.

  In ST302, the operator fits the fastening tool to the fastened member to be fastened according to the order of the processes, and sequentially tightens the fastened member. In ST303, the CPU 31 determines whether or not a signal indicating that the confirmation torque Mc has been reached from the torque sensor 21 is input, and if a signal is input, proceeds to ST304. In ST304, after inputting the signal that the confirmation torque Mc has been reached from the torque sensor 21, the CPU 31 starts detecting the tightening time using the time input from the timer 5.

  In ST305, the CPU 31 determines that the engagement has not been completed when the signal indicating that the predetermined torque Mf reached when the engagement is completed is not input from the torque sensor 21, and in ST307, the CPU 31 determines from the timer 5 that the predetermined time has elapsed. If the signal indicating that the value has reached is not input, it is determined that the predetermined time has not been reached.

  In ST307, the CPU 31 inputs a signal indicating that the CPU 31 has reached a predetermined time from the timer 5 in ST307 before inputting a signal indicating that the predetermined torque Mf has been reached from the torque sensor 21 in ST307, and in ST308. When the CPU 31 inputs a signal from the torque sensor 21 that the predetermined torque Mf when the fastening is completed is input, the CPU 31 determines that the fastening is normal. In ST309, the CPU 31 transmits a signal indicating normal fastening to the buzzer 4 and the touch panel 1, and the buzzer 4 receiving the normal fastening signal emits a normal fastening sound to notify the worker and receives a normal fastening signal. The touch panel 1 adds 1 to the display of the number of tightening completions and counts it.

  In ST305, when the CPU 31 inputs a signal indicating that the predetermined torque Mf when the engagement is completed is input from the torque sensor 21 before inputting the signal indicating that the predetermined time has been reached from the timer 5, the CPU 31 determines that the engagement is overlapped. In ST306, the CPU 31 sends a signal to the buzzer 4 that it is overlapped fastening, and the buzzer 4 that has received the overlap fastening signal emits a sound different in tone from that of normal fastening to notify the operator of the overlapping fastening.

  In ST310, the forgetting-fastening prevention apparatus repeats the above-described process sequence, counts the number of tightened members to be fastened, and terminates the operator when the number matches the predetermined number of fastened members.

  In the second embodiment, the forgetting-to-fasten device is configured to start detecting the tightening angle of the angle sensor 22 when the member to be fastened reaches the confirmation torque Mc in the process of tightening the member to be fastened. Then, instead of providing the angle sensor 22, the timer 5 is provided, and when the confirmation torque Mc is reached, the timer 5 counts down and starts counting down, so that it is cheaper than the relatively expensive angle sensor 22 as in the second embodiment. The effect of can be obtained.

  As described above, according to the third embodiment, in a forgetting fastening preventing apparatus that fastens a predetermined number of fastened members a predetermined number of times and checks whether fastening of the fastened member is completed, The torque sensor 21 that emits a signal when the torque at the time of fastening reaches the predetermined torque and the torque when the fastening is completed, the timer 5 that notifies the time, and the signal input from the torque sensor 21 are torque A CPU 31 that determines that the fastened member once fastened is a double fastening that has been fastened at the time earlier than the elapse of a predetermined time from the input of a signal generated when a predetermined torque is reached from the sensor 21; When the CPU 31 determines that the fastening is overlapped, the buzzer 4 is used to notify that a fastened member that has not been fastened is left. An effect that it is possible to prevent the forgetting to fasten.

Embodiment 4 FIG.
FIG. 9 is a diagram showing the relationship between the tightening angle and the tightening torque in the fourth embodiment of the present invention.
The forgetting to prevent fastening device of the fourth embodiment has the same configuration as the forgetting to prevent fastening device of the third embodiment.
In the third embodiment, the operator inputs the number of tightened members to be fastened necessary for product assembly on the touch panel 1, but in the fourth embodiment, the worker shows the tightening position of the fastened member in advance. At the same time, the touch panel 1 is used to input and display the input state together with the input of the tightening order of the members to be fastened and the number of tightening points of the members to be fastened necessary for product assembly at the mounting position shown in the figure.

  Further, on the touch panel 1, the positions of the fastened members to be fastened before the fastening of the fastened members are sequentially displayed on the product drawing. In addition, the touch panel 1 displays the number of completions of tightening the member to be fastened with the predetermined torque Mf with the fastening tool 2 during work. Signals from the touch panel 1 are transmitted to and received from the CPU 31 via the I / O interface 32, and input information such as the number of tightening points is stored in the storage unit 33.

  The fastening tool 2 includes a torque sensor 21 that emits a signal when the tightening torque M of the member to be fastened reaches a predetermined torque Mf, and a countdown signal when the countdown is completed. A timer 5 to be issued (for example, the timer countdown period is set to 10 to 30 seconds) is connected to the I / O interface 32, and signals output from the torque sensor 21 and the timer 5 are the I / O interface 32 in the control unit 3. Is transmitted to the CPU 31 via.

  The CPU 31 outputs the control signal to the I / O according to the flowchart shown in FIG. 3 on the basis of the information from the storage unit 33 that records the information of the fastened member input on the touch panel 1 and the signals from the torque sensor 21 and the timer 5. It transmits to the buzzer 4 and the touch panel 1 via the interface 32. When the input of the signal from the torque sensor 21 is earlier than the time input from the timer 5 exceeds a predetermined time from the start of the fastening, the CPU 31 performs the overlapping fastening in which the fastening member once fastened is fastened again. to decide.

  The method of determining whether the CPU 31 is normally engaged or overlappingly engaged with this structure is determined to be overlapped when the fastened member is tightened during the countdown of the timer 5, and otherwise determined to be normally engaged. The buzzer 4 informs the operator by generating a sound with different timbres for normal fastening and overlapping fastening for each place to be fastened.

Next, the operation will be described.
FIG. 10 is a flowchart of the fastening operation in the fourth embodiment.
In ST401, first, the operator uses the touch panel 1 as a product assembly information, a product drawing in which the fastening member mounting position is expressed, and the fastening order of the fastening member and the product assembly at the mounting position shown in the drawing. Enter the number of bolts to be fastened. The screen on the touch panel 1 displays the number of completions of fastening of the fastened member, and displays “0” as an initial value.

  In ST402, the worker fits the fastening tool to the fastened member to be fastened in accordance with the process order, and sequentially tightens the fastened member. At this time, on the screen on the touch panel 1, the position of the member to be fastened is displayed in the product drawing. In ST403, the CPU 31 determines whether or not a signal indicating that the torque sensor 21 has reached the predetermined torque Mf is input, and if a signal is input, proceeds to ST404.

  In ST404, the CPU 31 transmits a signal to the buzzer 4 and the timer 5, and the buzzer 4 that has received the signal generates a normal fastening sound to notify the operator, and the CPU 31 starts counting down using the timer 5. To do.

  In ST405, when the timer 31 counts down for a predetermined time and receives a signal from the torque sensor 21 that the torque 5 has reached the predetermined torque Mf when the engagement is completed, the CPU 31 determines that the engagement is overlapped. In ST406, The CPU 31 outputs to the buzzer 4 a signal indicating that it is overlapped fastening, and the buzzer 4 that has received the signal emits a sound different in tone from that of normal fastening to notify the operator of the overlapping fastening.

  In ST407, when the timer 5 completes the countdown of the timer 5, the countdown of the timer 5 is completed without inputting a signal indicating that the torque 5 has reached the predetermined torque Mf when the engagement is completed, while the timer 5 counts down for a predetermined time. The CPU 31 transmits a signal indicating normal fastening to the buzzer 4 and the touch panel 1, and the buzzer 4 that has received the normal fastening signal emits a normal fastening sound to notify the operator and receives the normal fastening signal. The touch panel 1 adds 1 to the display section of the number of tightening completions and counts it.

  In ST409, the procedure described above is repeated, the number of tightening of the predetermined fastened member is counted, and the operation is finished when the number of tightening of the predetermined fastened member matches.

  If the work is not completed in ST409, in ST410, the CPU 31 displays the position of the member to be fastened next from the number of fastening completions of the member to be fastened on the production drawing on the screen of the touch panel 1 and the following. The buzzer 4 notifies the tightening start permission of the member to be fastened.

  In this way, the product drawing in which the fastening member mounting position is previously expressed on the touch panel 1 in Embodiment 4 and the fastening order necessary for the product assembly at the mounting position shown in the drawing. The effect similar to that of the third embodiment can be obtained by displaying the input state together with the number of tightened members.

In addition, the product drawing in which the tightening position of the member to be fastened is displayed on the touch panel 1 and the position of the member to be fastened to be tightened before the start of tightening of the member to be fastened are displayed in the product drawing. Since the to-be-fastened member can be grasped on the screen on the touch panel 1, an act of fastening the already-fastened member to be fastened can be prevented in advance.
In the third embodiment, the torque is detected at two points of the predetermined torque Mf and the confirmation torque Mc. However, in the present embodiment, the predetermined torque Mf can be set to one point.

  As described above, according to the fourth embodiment, in the forgetting to prevent fastening apparatus that fastens a predetermined number of members to be fastened a predetermined number of times and checks whether the fastening of the members to be fastened is completed, The torque sensor 21 that emits a signal when the torque at the time of fastening reaches the torque when the fastening is completed, the timer 5 that notifies the time, and the input of the signal from the torque sensor 21 is the time input from the timer. When it is earlier than a predetermined time from the start of fastening, the CPU 31 that judges that the fastened member that has been fastened once is the double fastening that is fastened again, and when the CPU 31 judges that the fastening is duplicated, By providing the buzzer 4 that notifies that the fastening member remains, there is an effect that it is possible to prevent forgetting to fasten the fastened member.

Embodiment 5. FIG.
FIG. 11 is a diagram showing the relationship between the tightening angle and the tightening torque in the fifth embodiment of the present invention.
The forgetting-fastening device of the fifth embodiment has the same configuration as the forgetting-fastening device of the third embodiment.
In the fourth embodiment, the fastening tool 2 sequentially starts tightening the members to be fastened, and when the predetermined torque Mf is reached, the timer 5 counts down (for example, the timer countdown period is set to 10 to 30 seconds). In mode 5, the countdown of timer 5 (for example, the timer countdown period is set to 10 to 60 seconds) is started from the time when fastening of the fastened member is started.
As a method for determining whether the CPU 31 is normally fastened or double-fastened by this structure, the CPU 31 judges that the fastened member has been fastened during the countdown of the timer 5 and reaches the predetermined torque Mf, and then determines that the fastening is normal. If the member to be fastened is tightened before the countdown of is completed, it is determined that it is overlapped.
In addition, the buzzer 4 generates a sound with a different tone color from normal fastening, overlapping fastening, and time-out when the fastening member is not tightened to the predetermined torque Mf until the timer 5 counts down. To inform the worker.

Next, the operation will be described.
FIG. 12 is a flowchart of the fastening operation in the fifth embodiment.
In ST501, first, an operator uses the touch panel 1 as a product assembly information, a product drawing in which a fastening member mounting position is expressed, a tightening order of the fastening member and a product assembly at the mounting position shown in the drawing. Enter the number of bolts to be fastened. The screen on the touch panel 1 displays the number of completions of fastening of the fastened member, and displays “0” as an initial value.

  In ST502, the operator fits the fastening tool 2 to the fastened member to be fastened in accordance with the process order, and sequentially tightens the fastened member. At this time, on the screen on the touch panel 1, the position of the member to be fastened is displayed in the product drawing. In ST503, the CPU 31 starts counting down using the timer 5 simultaneously with the start of tightening of the first member to be fastened. In ST504, the CPU 31 determines whether or not a signal indicating that the torque sensor 21 has reached the predetermined torque Mf is input, and if a signal is input, proceeds to ST505.

In ST505, the CPU 31 transmits a signal to the buzzer 4 and the timer 5, and the buzzer 4 that has received the signal generates a normal fastening sound to notify the operator.
In ST506, when the timer 5 counts down for a predetermined time and receives a signal from the torque sensor 21 that the predetermined torque Mf has been reached when the engagement is completed, the CPU 31 determines that the engagement is overlapped. In ST507, The CPU 31 outputs to the buzzer 4 a signal indicating that it is overlapped fastening, and the buzzer 4 that has received the signal emits a sound different in tone from that of normal fastening to notify the operator of the overlapping fastening.

  In ST508, the CPU 31 completes the countdown of the timer 5 without inputting a signal indicating that the torque 5 has reached the predetermined torque Mf when the engagement is completed while the timer 5 counts down for a predetermined time, and in ST509 In the case of performing tightening that reaches the predetermined torque Mf of the member to be fastened until the countdown of the timer 5 is completed, in ST511, the CPU 31 transmits a signal indicating normal fastening to the touch panel 1 and receives a signal of normal fastening. The touch panel 1 adds 1 to the display section of the number of tightening completions and counts it.

  In ST509, if the tightening reaching the predetermined torque Mf of the member to be fastened is not performed until the countdown of the timer 5 is completed, the CPU 31 determines that the time is over and sends a signal to the buzzer 4. In ST510, the buzzer 4 that has received the signal emits a sound having different timbres from normal fastening and overlapping fastening to notify the operator of time over. Also, in ST504, when the tightening that reaches the predetermined torque Mf of the first member to be fastened is not performed before the countdown of the timer 5 is completed, the time over can be notified as in ST510.

  In ST512, the above-described procedure is repeated, and the number of tightening of the predetermined member to be fastened is counted, and the operation is finished when it matches the predetermined number of tightening of the member to be fastened.

  If the work is not completed in ST512, in ST513, the CPU 31 displays the position of the fastened member to be fastened next on the manufacturing drawing on the screen of the touch panel 1 based on the number of fastened fastening members, and then the following. The buzzer 4 notifies the tightening start permission of the member to be fastened.

  Thus, even if the countdown of the timer 5 is started from the start of tightening of the fastened member in the fifth embodiment, the same effect as in the fourth embodiment is obtained. Further, since the fastening time of the fastened member for each procedure is set by the timer 5, the product assembly time can be managed.

  Further, in the above description, the same effect can be obtained even when a plurality of fastening tools 2 are used according to the case where the number of fastening tools 2 is one, or depending on the types of members to be fastened, bolts, and screws.

  As described above, according to the fifth embodiment, in the fastening forgetting prevention device that fastens a predetermined number of members to be fastened a predetermined number of times and checks whether the fastening of the members to be fastened is completed, The torque sensor 21 that emits a signal when the torque at the time of fastening reaches the torque when the fastening is completed, the timer 5 that notifies the time, and the time when the signal input from the torque sensor 21 is input from the timer 5 When it is earlier than a predetermined time from the start of fastening, the CPU 31 determines that the fastening member once fastened is double fastening fastened again, and when the CPU 31 judges that double fastening is complete, the fastening is not completed. By providing the buzzer 4 that notifies that the member to be fastened remains, it is possible to prevent forgetting to fasten the member to be fastened.

It is a block diagram of the fastening forgetting prevention apparatus in Embodiment 1 and Embodiment 2 of this invention. It is a figure which shows the relationship between the tightening angle and tightening torque in Embodiment 1 of this invention. It is a flowchart about the operation | movement of the fastening operation | work in Embodiment 1 of this invention. It is a figure which shows the relationship between the tightening angle and tightening torque in Embodiment 2 of this invention. It is a flowchart about operation | movement of the fastening operation | work in Embodiment 2 of this invention. It is a block diagram of the fastening forgetting prevention apparatus in Embodiment 3, 4, 5 of this invention. It is a figure which shows the relationship between the tightening angle and tightening torque in Embodiment 3 of this invention. It is a flowchart about the operation | movement of the fastening operation | work in Embodiment 3 of this invention. It is a figure which shows the relationship between the tightening angle and tightening torque in Embodiment 4 of this invention. It is a flowchart about operation | movement of the fastening operation | work in Embodiment 4 of this invention. It is a figure which shows the relationship between the tightening angle and tightening torque in Embodiment 5 of this invention. It is a flowchart about the operation | movement of the fastening operation | work in Embodiment 5 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Touch panel, 2 Fastening tool, 3 Control part, 4 Buzzer, 5 Timer, 21 Torque sensor, 22 Angle sensor, 31 CPU, 32 I / O interface, 33 Memory | storage part.

Claims (5)

In the fastening forgetting prevention device for fastening a predetermined number of members to be fastened by the predetermined number of times and checking whether the fastening of the members to be fastened is completed,
A torque sensor that emits a signal when the torque for fastening the fastened member reaches the torque when the fastening is completed;
An angle sensor that emits a signal when the rotation angle at the time of fastening the member to be fastened reaches a predetermined angle from the start of fastening;
When the signal input from the torque sensor is earlier than the signal input from the angle sensor, a processing unit that determines that the fastening member that has been fastened once is overlapped fastening, and
A forgetting to prevent fastening device comprising: a notifying unit for notifying that the to-be-fastened member that has not been fastened remains when the processing unit determines that the fastening is duplicated. In the fastening forgetting prevention device for fastening a predetermined number of members to be fastened a predetermined number of times and checking whether the fastening of the members to be fastened is completed,
A torque sensor that emits a signal when the torque when fastening the member to be fastened reaches a predetermined torque and a torque when the fastening is completed;
An angle sensor that emits a signal when a rotation angle at the time of fastening a member to be fastened reaches a predetermined torque from the torque sensor and rotates a predetermined angle from the input of a signal generated when the torque is reached;
When the signal input from the torque sensor is earlier than the signal input from the angle sensor, a processing unit that determines that the fastening member once fastened is overlapped fastening again,
A forgetting to prevent fastening device comprising: a notifying unit for notifying that a fastened member that has not been fastened remains when it is determined that overlapping fastening is performed in the processing unit. In the fastening forgetting prevention device for fastening a predetermined number of members to be fastened a predetermined number of times and checking whether the fastening of the members to be fastened is completed,
A torque sensor that emits a signal when the torque at the time of fastening the member to be fastened reaches the torque when the fastening is completed;
A timer to notify the time,
When the input of the signal from the torque sensor is earlier than the time input from the timer has passed a predetermined time from the start of fastening, a process for determining that the fastened fastening is fastened once again. And
A forgetting to prevent fastening device comprising: a notifying unit for notifying that a fastened member that has not been fastened remains when it is determined that overlapping fastening is performed in the processing unit. In the fastening forgetting prevention device for fastening a predetermined number of members to be fastened a predetermined number of times and checking whether the fastening of the members to be fastened is completed,
A torque sensor that emits a signal when the torque when fastening the member to be fastened reaches a predetermined torque and a torque when the fastening is completed;
A timer to notify the time,
When the signal input from the torque sensor is earlier than the lapse of a predetermined time from the input of the signal generated when the torque reaches a predetermined torque from the torque sensor, the member to be fastened once is A processing unit that determines that it is a double fastening that has been fastened again;
A forgetting to prevent fastening device comprising: a notifying unit for notifying that a fastened member that has not been fastened remains when it is determined that overlapping fastening is performed in the processing unit.   The fastening forgetting prevention device according to any one of claims 1 to 4, further comprising a display unit that displays a fastening order of the fastened members.

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