JPH09155753A - Part-setting-completion informing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent insufficient fastening of machine screws by comparing a set part number value with a count value for a setting completion signal by a counting means to be equal or not, so that information can be given by an information means. SOLUTION: When members 30, 35 are fastened with machine screws BS1-BS3, if the machine screw BS1 is threaded by an electric torque driver 10, an incomplete setting signal and setting completion signal are generated in a comparator for a counting means by a signal generating means to judge setting completion. A counter is used for count value analog-conversion and a part number set value is input to a comparing means to be compared with a count value for the setting completion signal. At the time when the settings of the machine screws BS1-BS3 are completed, a sound source 20 is operated via a reset means to inform user thereof. After a preset delay time elapsed, a count value for the counter is reset. The preset number of parts is shown in a display column 18a in a display means 18 and a value counted by the counter is shown in a display column 18b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parts setting completion notifying device which is provided in a setting device such as an electric torque driver and notifies the user of the completion of setting of parts such as screws. is there.

[0002]

2. Description of the Related Art One member may be fixed to another member by a component such as a screw. In such fixing work of members, one member is fixed to another member using a plurality of screws. Installation of such screws is
For example, an electric torque driver is used. This type of electric torque driver fixes a member to another member by fitting a screw into a hole of a member and screwing a screw portion of the screw into another member with a predetermined torque.

[0003]

By the way, since a plurality of screws are used in the fastening work of the members by the screw fastening, it often happens that the screws are forgotten to be tightened or the screws are not tightened sufficiently. Such a state of forgetting or insufficiently tightening the screws is difficult for an operator to visually check, and is likely to be overlooked. Therefore, the present invention has been made to solve the above problems, and provides a component setting completion notifying device capable of notifying the completion of the setting of necessary components when a plurality of components are set. It is an object.

[0004]

According to the present invention, there is provided a setting device for counting a set number of parts when setting a plurality of parts for an object in order. A setting completion notification device for a component for reporting the completion of the setting, and an incomplete setting signal indicating a state in which the component is incompletely set to the object due to a change in the state of the driving means in the setting device, The setting completion signal indicating that the setting of the part to the target object is completed, the signal generating means for generating, and the number of parts to be set to the target object,
Part number setting means for setting in advance, counting means for counting the setting completion signal from the signal generating means, and comparing the set part number and the count value of the setting completion signal in the counting means are equal or not This is achieved by a component setting completion notifying device that includes a comparing unit that performs the setting, and a notification unit that issues a notification when the component numerical value and the count value of the setting completion signal are equal as a result of the comparison.

According to the present invention, the signal generating means outputs an incomplete setting signal indicating that the component is incompletely set with respect to the object due to a change in the state of the driving means in the setting device, and the object with respect to the object. A setting completion signal indicating that the setting is completed is generated. The number of parts to be set by the user in advance is set in the parts number setting means. Then, when actually setting a plurality of parts in order to the object, the counting means counts the setting completion signal from the signal generating means. Then, the comparison means compares whether the set component numerical value and the count value of the setting completion signal in the counting means are equal. As a result of this comparison, if the numerical value of the component and the numerical value of the setting completion signal are equal, the notification means issues a notification.

With this, the user can surely know by the notification of the notification means that the setting has been completed by the number of parts to be set for the preset object. Therefore, it is possible to avoid the state where the setting of the component is forgotten or the setting of the component is insufficient.

[0007]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limitations are given, the scope of the present invention is not limited to these modes unless otherwise specified to limit the present invention.

FIG. 1 shows an example of an electric torque driver 10 and an object OB as a setting device equipped with a component setting completion notification device of the present invention. The electric torque driver 10 has a grip portion 12 and a tool 14. The grip portion 12 includes a pilot lamp 16 and a display means 18.
And a sound source 20 and a motor M. The pilot lamp 16, the display means 18, and the sound source 20 are arranged on the outer peripheral portion of the grip portion 12. The motor M is provided in the grip portion 12, and the motor M can rotate the tool 14 in the direction of arrow MR1 (clockwise direction) or in the direction of arrow MR2 (counterclockwise direction). This motor M
Is electrically connected to the power supply 22. The grip portion 12 is
It is of a size that can be held by an operator's hand, and is shaped to be easily held.

Next, the object OB will be described. In the example of FIG. 1, the object OB needs to fix the member 30 to another member 35 using screws BS1, BS1, BS3. The electric torque driver 10 uses the member 30 as the member 3
Work to stop the No. 5 firmly using screws BS1 to BS3. Therefore, the member 30 has three holes H1, H
2, H3 are formed. The tip of the tool 14 is a screw B
The tool 14 is formed so as to project in a cross shape so as to be fitted into the cross groove of S1, and the tool 14 can magnetically attract and hold the screw BS1.

Next, with reference to FIG. 2, the setting completion notification device 40 for the components arranged in the electric torque driver 10 of FIG. 1 will be described. The component setting completion notification device 40 includes a signal generating means 50, a component numerical value setting means 60, a counting means 70,
Comparison means 80, sound source (report means) 20, reset means 9
5, display means 18 and the like.

The electric torque driver 10 shown in FIG.
When S1 to BS3 are fitted into the members 30 and 35 and tightened, the screws BS1 to BS3 can be tightened with a constant torque. In the case of the mounting work by tightening the screws BS1 to BS3, the light emitting diode (LED) 51 of the signal generating means 50 forms a signal as shown in FIG. That is, for example, while tightening the screw BS1 with the electric torque driver 10 of FIG.
A pulse waveform PH as shown in (a) is generated. In this case, the plus side height UL of the pulse waveform PH with respect to the ground GND is, for example, 0.55 V, and the bottom side height LL with respect to the ground GND is, for example, 11.8.
V. Then, when the screws BS1 to BS3 are tightened with a predetermined torque, the tool 14 of the electric torque driver 10 is
Since the rotation of No. 1 is stopped, the signal of the light emitting diode 51 becomes constant as shown in FIG. Constant value C in this case
L is 2V with respect to the ground GND, for example.

The signal generating means 50 shown in FIG. 2 includes a low pass filter 52 in addition to the light emitting diode 51 described above. The low-pass filter 52 is for removing noise when the motor M of the electric torque driver 10 of FIG. 1 is operated and the tool 14 is rotating, because noise is added to the signal of the light emitting diode 51. Therefore, the low-pass filter 52 has a configuration of the resistor R1 and the capacitor C1 as shown in FIG.

While the screws are being tightened, the signal waveform (a) of the light emitting diode 51 is changed to the low pass filter 52.
When it is passed through, the waveform becomes almost as shown in FIG. The peak-to-peak voltage of this waveform shape is 1.1 Vp-p, for example. Also, when the screw is tightened,
As shown in FIG. 3D, the signal waveform of the light emitting diode 51 after passing through the low-pass filter 52 of the signal waveform (b) has a constant value as shown in FIG. 3D. The above-mentioned numerical examples are values when the frequency is 50 Hz.

FIG. 4 shows an example of signal waveforms in each circuit portion of the component setting completion device 40 of FIG. In FIG. 4, the signal (B) of the light emitting diode is a waveform example of the signal of the light emitting diode 51 that has passed through the low pass filter 52. The waveform during the screw tightening is the incomplete setting signal (c), and the waveform after the screw is tightening is the setting completion signal (d). This waveform incomplete setting signal (c) is shown in FIG.
The screw BS1 (BS2 or BS3) indicates the state in which the member 30 and the member 35 are being tightened, that is, the state in which the screw 30 is incompletely set. On the other hand, the waveform setting completion signal (d) is the screw BS1 (BS2 or BS3).
Indicates that the members 30 and 35 are completely tightened with a predetermined torque, that is, the setting of the parts to the object is completed. The signal generating means 50 can output the incomplete setting signal (c) and the setting completion signal (d) to the counting means 70 of the next stage.

Next, the counting means 70 will be described. The counting means 70 is a means for counting the setting completion signal (d) sent from the signal generating means 50. The counting means 70 includes a comparator 71, a counter 72, a D /
The A converter 73 and the like are provided.

The comparator 71 compares the signal (B) of the light emitting diode of FIG. 4 with a predetermined voltage value, and outputs only the setting completion signal (d) as a pulse signal (C) to the counter 72 side as a pulse train. To do. The set voltage value of the comparator 71 is the height CL of the setting completion signal (d).
Can be set to a smaller value, for example a comparison voltage value CV such as 1.5V. The counter 72 counts and integrates the pulse signal (C) of FIG. 4 output from the comparator 71 to obtain the counter value shown in FIG. 4 (D). The D / A converter 73 is adapted to digital-analog convert the count value (D) from the counter 72 and send it to the comparison means 80.

On the other hand, the component numerical value setting means 60 is provided with a setting instructing section 61, a D / A converter 62 and a subtracting section 63 by which the user can manually set the number of parts to be set. The user can set the number of screws, that is, three screws BS1 to BS3 in the example of FIG. D / A according to the setting number 3
The converter 62 carries out digital-analog conversion and is shown in FIG.
The component number setting value indicated by is sent to the subtracting unit 63. This subtraction unit 63 is for making the level 3LV of the component number set value (E) into the subtracted component number set value (F) of FIG. 4, for example, the level 3LV of the component number set value (E) is It is set to the level 2LV of the subtracted component number setting value (F). In the counter value (D), the component number setting value (E), and the subtracted component number setting value (F), the reference level 1LV is, for example, 0.
Since it is 11V, 2L of the subtracted component number setting value (F)
The V level is 0.22V, for example, and the 3LV level is 0.33V.

The comparing means 80 compares the subtracted component number setting value (F) with the counted setting value (D) of the setting completion signal, and when they are equal, the comparison signal (C) of FIG.
S) is sent to the reset means 95 side.
The reset means 95 includes a standby setting section 96 and a forced reset means 97. Standby setting unit 96
When the comparison signal (CS) from the comparison means 80 is input, the signal is applied to the sound source (report means) 20 to activate the sound source 20 at time T1 in FIG. This sound source is, for example, a buzzer.

Then, the standby setting section 96 can set the delay time as shown in FIG. 4H by adjusting the time constant. That is, after the delay time, for example, t = 1 second from the time point T1, the counter 7 of the counting means 70
The count value of 2 can be reset. The reset means 95 has a forced reset means 97, and the user can reset the count value of the counter 72 at any time by operating the forced reset means 97.

The display means 18 of FIG. 2 has two display columns 18
a, 18b. The display column 18a is for digitally displaying the number "3" corresponding to the number of screws set by the setting instruction section 61 of the component numerical value setting means 60, for example, three screws. Similarly, the display column 18b is adapted to display a number corresponding to the number counted by the counter 72 of the counting means 70. By comparing these display columns 18a and 18b, the user can visually judge whether the number of screw tightening completion has reached a predetermined component numerical value. Therefore, this display means 1
8 and the sound source 20 constitute a notification means for the user. That is, as described above, the display unit 18 is a portion that the user can visually confirm, and the sound source 20 is a portion that the user can confirm by listening.

Next, the operation of the electric torque driver 10 equipped with the above-mentioned component setting completion notification device will be described. First, in FIG. 1, the user uses an electric torque driver 1
Hold the grip portion 12 of 0 by hand. Then, as shown in FIG. 1, the tool 14 is pressed against the cross groove of the first screw BS1 to magnetically attract the screw BS1 to the tool 14. Then, by pressing a switch (not shown), the motor M is operated and the tool 1
4 is rotated in the direction of arrow MR1. Screw BS1 member 30
The screw BS1 tightly clamps the members 30 and 35 by fitting it into the hole H1 and pressing it.

Similarly, the second screw BS2 and the third screw BS3 are fitted into the holes H2 and H3, respectively, and tightened by rotation. As a result, the members 30 and 35 are 3
It will be firmly fixed with three screws BS1 to BS3.

In such tightening work of the screws BS1 to BS3, the component setting completion device 40 of FIG. 2 operates as follows. When the electric torque driver 10 of FIG. 1 screws the first screw BS1 into the hole H1 to fasten the members 30 and 35, the signal generating means 50 of FIG. 2 causes the incomplete setting signal (c) of FIG. ) And the setting completion signal (d) are generated in the comparator 71 of the counting means 70. Comparator 7
1 compares the comparison voltage value CV in FIG. 4 with the setting completion signal (d) of the signal (B) of the light emitting diode that has passed through the low pass filter, and outputs a pulse signal (C). This pulse signal (C) enters the counter 72, and the counter 72 converts the count value (D) into the D / A converter 7 of FIG.
Send to 3 for digital-analog conversion.

On the other hand, the subtracted number-of-components setting value (F) of FIG. 4 enters the comparing means 80 as an analog value via the component numerical value setting means 60, the D / A converter 62 and the subtracting section 63. The comparison means 80 compares the count value (D) of the setting completion signal, which is an analog value, with the set value (F) of the subtracted number of parts. That is, when the electric torque driver 10 of FIG. 1 completes the setting by tightening the three screws BS1, BS2, BS3 with predetermined torques, the comparing means 80 sets the comparison signal (CS) of FIG. Send to section 96.

By receiving the comparison signal (CS), the standby setting section 96 operates the sound source 20 of FIG. 2 at the time point (T1) of the fall of the comparison signal (CS),
For example, a buzzer sounds to inform the user. Further, the standby setting unit 96 resets the count value of the counter 72 to the initial value 0 after a predetermined delay time t, for example, 1 second has elapsed. on the other hand,
In the display column 18a of the display means 18, the component number setting value means 6
The number of parts set in advance by 0, "3" in this embodiment
Is displayed. Similarly, the display column 18b sequentially displays the values counted by the counter 72 as "1, 2, 3". Number 3 displayed in display field 18a and display field 1
When the number 3 displayed on 8b is the same, the user can visually recognize that the setting of the three screws is completed. In this way, the user can recognize the completion of the setting by the sound generated by the operation of the sound source 20 and the completion of the setting by the display unit 18, so that the settings of the three screws can be surely completed. As described above, when an operator tightens a component such as a screw with a predetermined torque on the object OB, a screw fitting error or an incomplete screw tightening force is prevented. It is possible to solve this problem and prevent the lack of screws.

The present invention is not limited to the above embodiment. For example, although the display means 18 of FIG. 2 uses a digital 7-segment display device, the display means 18 is not limited to this, and may be a dot-type display means using LEDs, for example. Further, the display means 18 is
A liquid crystal display device, a plasma display, or a display means such as a fluorescent display time can be adopted. In the illustrated embodiment, the mounting of the three screws is described, but the present invention is not limited to this, and can of course be applied to the case where a predetermined number of other types of parts are mounted on the object.
Further, the present invention can be applied to tools in other fields as well as portable power tools such as an electric torque driver.

[0027]

As described above, according to the present invention,
When setting a plurality of parts, the completion of the setting of the necessary parts can be reported.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an electric torque driver and an object provided with a component setting completion notification device of the present invention.

FIG. 2 is a circuit diagram showing an example of a setting completion notification device for components of the electric torque driver of FIG.

3A and 3B are views showing an example of a signal generating means of the setting completion notifying device of the component of FIG. 2 and an example of a waveform thereof.

FIG. 4 is a diagram showing a signal example of each part in the circuit of FIG.

[Explanation of symbols]

 18 display means (reporting means) 20 sound source (reporting means) 30, 35 member (object) 40 electric torque driver (component setting device) 50 signal generating means 60 component value setting means 70 counting means 80 comparing means 95 resetting means ( c) Incomplete setting signal (d) Setting completion signal (D) Count value of setting completion signal (d) (F) Number of parts setting value (number of parts) M Motor (driving means) BS1, BS2, BS3 Screw (part)

Claims (7)

[Claims] 1. A part setting completion notifying device for counting the number of set parts and notifying the completion of setting when a plurality of parts are sequentially set to an object using a setting device. Yes, an incomplete setting signal indicating that the component is incompletely set to the object due to the change of the driving means in the setting device, and a setting completion signal indicating that the setting of the object to the object is completed And a signal generating means for generating, a component number setting means for presetting the number of components to be set for the object, and a counting means for counting the setting completion signal from the signal generating means, Comparing means for comparing whether the set component numerical value and the count value of the setting completion signal in the counting means are equal to each other, and when the result of the comparison indicates that the component numerical value and the count value of the setting completion signal are equal, a notification is issued. Reporter If the setting completion notification apparatus components, characterized in that it comprises a. 2. The component setting completion notification device according to claim 1, wherein the notification means includes a display device that displays a component value and a count value of the setting completion signal. 3. The notification means comprises: a display means for displaying the component value and the count value of the setting completion signal; and a sound source that emits a sound when the component value and the count value of the setting completion signal are equal to each other. Setting completion notification device for the described parts. 4. The component setting completion notifying device according to claim 1, wherein the signal generating means is a pilot lamp of an electric power tool. 5. The component setting completion notification device according to claim 4, wherein the pilot lamp is a light emitting diode. 6. The component setting completion notification device according to claim 1, wherein the component is a screw. 7. When a predetermined time has elapsed after the component numerical values and the count value of the setting completion signal became equal,
The component setting completion notification device according to claim 1, further comprising resetting means for resetting a count value of the setting completion signal in the counting means.