JP2018187745A - Fastening sequence display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastening sequence display device which receives fastening arrival signals for every screw transmitted from a screw fastening tool to display the fastening position of a next screw in a visual display part according to a predetermined fastening sequence.SOLUTION: A fastening sequence display device is configured by keeping a screw fastening tool equipped with detection means that detects arrival at a set torque and wireless transmission means that transmits arrival signals of the detection means, display means 4 of the fastening sequence display device 1 being equipped with selection means 41 that selects the number of screws out of a screw group of a plurality of sets different in number of fastening object screws, a visual display part 42 that schematically displays screw positions of the plurality of sets, and receiving means that receives the arrival signals for every screw transmitted from the screw fastening tool, and receives the arrival signals for every screw according to a fastening sequence selected and predetermined by the selection means 41 to display the fastening position of a next screw on the visual display part 42.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tightening sequence indicator that displays a tightening sequence of a plurality of screws, and receives a tightening arrival signal for each screw transmitted from a screw tightening tool and performs predetermined tightening. In this technique, the tightening position of the next screw is displayed on the visual display unit according to the order.

Conventionally, the tightening order of wheel nuts against wheel bolts is displayed on the surface of a disk-shaped magnet sheet that can be attached to the hub surface that covers the end of the axle. A sheet is known (see, for example, Patent Document 1).
Conventionally, it is known to display the tightening order of bolts with respect to an operator on a display using a light emitter, a camera, a computer, a display, or the like (see, for example, Patent Document 2).

  Further, conventionally, it is known that the bolt tightening operation is performed according to a procedure in accordance with an instruction on a screen of a personal computer (see, for example, Patent Document 3).

Utility Model Registration No. 3192844 Japanese Patent No. 4724211 JP 2002-239939 A

The conventional wheel nut tightening order display sheet described in Patent Document 1 has an advantage of simple structure, but when an operator interrupts a set of screw tightening work for some reason and resumes the work. There was a problem of not knowing which screw was tightened.
In addition, the conventional tightening order display described in Patent Document 2 and Patent Document 3 requires a complicated facility such as a computer, and an operator has to be proficient in handling the facility. there were.

  The present invention is intended to solve the problem of such a conventional configuration, and receives a tightening arrival signal for each screw transmitted from a screw tightening tool, and is determined in advance. It is an object of the present invention to provide a tightening order indicator that displays the tightening position of the next screw on the visual display section in accordance with the tightening order.

The tightening order indicator of the present invention according to claim 1 is used when a plurality of screws to be tightened arranged on the circumference are tightened using a screw tightening tool in accordance with a predetermined tightening order. A tightening order indicator having a display means for displaying the tightening order,
The screw tightening tool includes detection means for detecting the arrival of a set torque, and wireless transmission means for transmitting the arrival signal of the detection means to the display means, and the operation is stopped by the arrival signal. And
The display means is a selection means for selecting the number of screws from a plurality of sets of screws with different numbers of screws to be tightened, and a visual display that schematically displays the position of each of the plurality of sets of screws. And receiving means for receiving the arrival signal,
The display means receives the arrival signal for each screw according to a predetermined tightening order selected by the selection means, and displays the tightening position of the next screw on the visual display section. It is a thing.

  According to a second aspect of the present invention, there is provided a tightening order indicator of the present invention, in addition to the structure of the tightening order indicator of the present invention according to the first aspect, the display means is a set of screws selected by the selection means. When all of these receive the arrival signal, the end of tightening is displayed on the visual display unit.

According to a third aspect of the present invention, the tightening order indicator of the present invention is arranged in addition to the structure of the tightening order indicator of the present invention according to the first or second aspect, and the tightening objects are arranged at a predetermined pitch in the disc wheel. Wheel nuts,
In the predetermined tightening order, the tightening position of the next screw is the position of the screw facing the position of the screw that has received the arrival signal.

According to a fourth aspect of the present invention, in addition to the configuration of the tightening order indicator of the present invention according to any one of the first to third aspects of the present invention, the selection means has a set of five screws. , 6, 8 and 10 can select the number of screws,
In any case, the screw tightening position of each set of screw groups is displayed on the visual display unit at a predetermined pitch based on the number of screws.
The visual display unit is configured to display a total of 20 screw tightening positions by sharing the display when the screw tightening positions of different sets of screw groups coincide with each other.

  The tightening order indicator of the present invention according to claim 5 is the structure of the tightening order indicator of the present invention according to any one of claims 1 to 4, and the visual display section is an LED lamp. It is.

The tightening order indicator of the present invention according to claim 6 is the configuration of the tightening order indicator of the present invention according to any one of claims 1 to 5, and the display means is in the vicinity of the tightening object by a magnet. Installed in
The magnet is provided at the tip of three legs that can be inserted and removed from the back surface of the display means.

  The tightening order indicator of the present invention according to claim 1 is characterized in that the screw tightening tool has a detecting means for detecting the reaching of a set torque, and a wireless type in which an arrival signal of the detecting means is transmitted to the displaying means. Transmitting means, the operation is stopped by the arrival signal, the display means is a selection means for selecting the number of screws from a plurality of screw groups different in the number of screws to be tightened, and A visual display unit that schematically displays the position of each of a plurality of screws and a receiving unit that receives the arrival signal are provided, and the display unit is selected by the selection unit and predetermined. The arrival signal for each screw is received in accordance with the tightening order, and the tightening position of the next screw is displayed on the visual display section. In order indicator While forgetting tightening of the screw, the order mistake fastening is of the so-called twice tighten tightening again incorrectly screws tightened normally can be reliably prevented.

  According to a second aspect of the present invention, there is provided a tightening order indicator of the present invention, in addition to the effect of the tightening order indicator of the present invention according to the first aspect, the display means is a set of screws selected by the selection means. When all of the devices have received the arrival signal, the end of tightening is displayed on the visual display unit, so that the operator can be surely notified of the completion of a series of operations.

  According to a third aspect of the present invention, the tightening order indicator of the present invention has the effect of the tightening order indicator of the present invention according to the first or second aspect, and the tightening objects are arranged at a predetermined pitch in the disc wheel. Wheel nuts, and the predetermined tightening order is such that the tightening position of the next screw is the position of the screw opposite to the position of the screw that has received the arrival signal. Inspection and maintenance can be performed reliably.

  According to a fourth aspect of the present invention, in addition to the effect of the tightening order indicator of the present invention according to any one of the first to third aspects, the selection means has a set of five screws. 6, 8, and 10, the number of screws can be selected, and the screw tightening position of each set of screw groups can be set to a predetermined pitch based on the number of screws. When the screw tightening positions between different sets of screw groups coincide with each other, the visual display section shares the display and displays a total of 20 screw tightening positions. Since it is displayed, it is possible to display the screw tightening position that is easy for the operator to visually recognize, while almost covering the number of sets of screws used in trucks, buses, and the like.

  The tightening order indicator of the present invention according to claim 5 has an LED lamp in addition to the effect of the tightening order indicator of the present invention according to any of claims 1 to 4. In addition, while being able to reduce the replacement frequency of the battery or the like, it is possible to easily control to a plurality of emission colors and improve the visibility of the operator.

  The tightening order indicator of the present invention according to claim 6 has the effect of the tightening order indicator of the present invention according to any one of claims 1 to 5, and the display means is in the vicinity of the tightening object by a magnet. Since the magnet is provided at the tips of the three leg portions that can be put in and out from the back surface of the display means, it can be easily installed and removed.

BRIEF DESCRIPTION OF THE DRAWINGS It is drawing which shows the fastening order indicator which concerns on embodiment of this invention, (a) is a front view, (b) is a back side perspective view. It is a perspective view of the screw fastening tool used in connection with the fastening order indicator which concerns on embodiment of this invention. It is a block diagram of a control board built in a screw tightening tool used in connection with a tightening order indicator concerning an embodiment of the invention. It is explanatory drawing which shows the fastening operation | work of the screw using the fastening order indicator which concerns on embodiment of this invention. It is a block diagram of the control board built in the tightening order indicator which concerns on embodiment of this invention. It is a state transition diagram explaining transition of the lighting state of the LED lamp in the tightening order indicator which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 to 6 are drawings according to an embodiment of the present invention, FIG. 1 is a tightening order indicator, FIG. 2 is a perspective view of a screw tightening tool, and FIG. 3 is a control board built in the screw tightening tool. 4 is an explanatory diagram of the tightening operation, FIG. 5 is a block diagram of a control board built in the tightening order indicator, and FIG. 6 is a transition diagram of the lighting state of the LED lamp in the tightening order indicator. .

<Overall schematic configuration of tightening order indicator>
As shown in FIG. 1, the tightening order indicator 1 is formed in a disk shape, and a plurality of screws to be tightened arranged on the circumference are screwed in accordance with a predetermined tightening order. When fastening is performed using the fastening tool 2 (see FIG. 2), display means 4 for displaying a fastening order is provided.
The display means 4 includes a selection means 41 for selecting the number of screws from among four sets of screws having different numbers of screws to be tightened, and a visual display section for schematically displaying the positions of the four sets of screws. 42, receiving means 43 (see FIG. 5), and a power switch 44 are provided.

The number of screws in one set to be tightened is four sets of 5, 6, 8, and 10, and a numerical value is indicated on each selection switch (41a, 41b, 41c, 41d) as the selection means 41. Has been.
A total of 20 LED lamps that are visual display units 42 are arranged on the outer circumference of the surface of the tightening sequence indicator 1.

When the number of screws in one set is 5, 6, 8, or 10, the screw tightening position of each set of screw groups is visually displayed at a predetermined pitch based on the number of screws. It is made to display with the LED lamp which is.
When the screw tightening positions between different sets of screw groups coincide, the visual display unit 42 displays the tightening positions of a total of 20 screws by sharing the LED lamp.

Specifically, when the number of screws in a set is 10, the angle is 36 degrees, the angle is 8 degrees, the angle is 45 degrees, the angle is 6 degrees, the angle is 60 degrees, and the angle is 5 The LED lamp is displayed as the tightening position every 72 degrees.
In the case of 5 screws, all of them match the case of 10 screws, and in the case of 6 screws and 8 screws, they match the case of 10 screws at angles of 0 degrees and 180 degrees. The attached position is indicated by an LED lamp.

Accordingly, the angles of the 20 LED lamps in FIG. 1 (a) are clockwise, 0 degrees, 36 degrees, 45 degrees, 60 degrees, 72 degrees, 90 degrees, 108 degrees, 120 degrees, and 135 degrees at the top. 144 degrees, 180 degrees, 216 degrees, 225 degrees, 240 degrees, 252 degrees, 270 degrees, 288 degrees, 300 degrees, 315 degrees and 324 degrees.
Further, as shown in FIG. 1B, the tightening order indicator 1 is provided with a magnet 5 at the tip of three leg portions 51 that can enter and exit the housing 45 from the back surface of the display means 4. An open / close lid 52 for battery storage is provided.

<Configuration of screw tightening tool>
As shown in FIGS. 2 and 3, the screw tightening tool 2 includes a detection unit 21 that detects the arrival of a set torque, and a wireless transmission in which an arrival signal of the detection unit 21 is transmitted to the display unit 4. Means 22 and the operation is stopped by the arrival signal.
Specifically, the screw tightening tool 2 is an air nutrunner driven by compressed air, and the detection means 21 uses a strain gauge as a torque detection sensor.

When the operator continues to press the start button 24 provided on the main handle 23, the mechanical start valve 25 is opened, and compressed air is introduced into the housing 27 of the screw tightening tool 2 from the air inlet 26.
Then, the air motor 28 is driven by the compressed air introduced into the housing 27, and the output shaft 30 is rotationally driven through the multistage reduction unit 29 by the planetary gear group, so that the socket 30 a ( 4), the screw to be tightened is tightened.

When the screw is tightened and the tightening torque at that time of the screw reaches the set torque, an arrival signal is generated by the operation of the detection means 21, and the arrival signal is transmitted from the transmission means (transmitter) 22 to the reception means of the display means 4. It is configured to be transmitted to (receiver) 43 (see FIG. 5).
Here, the detection means 21 comprises a strain gauge 21a and a CPU 21b.

Then, the strain gauge 21a outputs a signal corresponding to the tightening torque of the screw at that time, and the CPU 21b compares the signal from the strain gauge 21a with a preset set torque, and when the signal reaches the set torque. An arrival signal is generated at
When the arrival signal is generated, the compressed air passage to the air motor 28 is closed by the operation of the electromagnetic valve 31 provided in the housing 27 even if the operator continues to press the start button 24, and the output shaft 30 rotates. It is comprised so that a drive may be stopped.

The setting torque of the screw tightening tool 2 is set by a torque control / display unit 32 provided on the upper surface of the screw tightening tool 2.
The torque control unit / display unit 32 is provided with a display panel 32a, a determination lamp 32b, a setting lamp 32c, a setting switch 32d, a power switch 32e, and the like.

  In FIG. 2, 33 is a battery storage box for storing the battery 33a, 34 is a sub handle, 35 is a reaction force receiver, and in FIG. 3, 36 is a control board, 36a is an amplifier, 36b is an A / D converter, 36c is a clock and 36d is a regulator.

<Usage example of tightening sequence display>
FIG. 4 shows an example of use of the tightening sequence indicator 1 in the case of tightening the wheel nut of the disc wheel of the truck having a set of six screws using the screw tightening tool 2 configured as described above. This will be explained based on.
The tightening order indicator 1 is installed on the flange 61 at the center of the disc wheel 6 with a magnet 5 (see FIG. 1B).

Since the magnet 5 for installing the tightening order indicator 1 is provided at the tip of the three leg portions 51 that can enter and exit from the back surface of the display means 4 into the housing 45, the flange 61 becomes a convex surface or a concave surface. Even if it is, the tightening order indicator 1 can be installed reliably.
The operator sets the set torque on the control unit / display unit 32 of the screw tightening tool 2 and connects the compressed air supply hose 62 to the screw tightening tool 2 so as to be detachably attached to the output shaft. The socket 30a and the reaction force receiver 35 are fitted to a screw and a nut adjacent to the screw.

Then, by continuing to press the start button 24 of the screw tightening tool 2, the screw can be tightened, and when the screw is tightened to reach the set torque, an arrival signal is generated by the operation of the detecting means 21.
When the arrival signal is generated, it is transmitted from the transmission means 22 to the reception means (receiver) 43 of the display means 4 and, as will be described later, the screw to be tightened next on the tightening order indicator 1 is an LED lamp. It is displayed.

<Specific configuration of tightening order indicator>
Transition of the lighting state of the LED lamp in the tightening order indicator 1 will be described with reference to FIGS. 1, 5, and 6.
Taking the case where the tightening target is a wheel nut arranged at a predetermined pitch in the disc wheel as an example, the tightening order of each wheel nut is ensured evenly by setting the tightening order of each wheel nut diagonally. It is necessary.

Here, the diagonal order refers to the tightening order in which the tightening position of the next screw is the position of the screw facing the position of the screw that has received the arrival signal.
Therefore, the tightening order indicator 1 allows the operator to select the tightening order by simply selecting the number of screws to be tightened from among 5, 6, 8 and 10 with the selection means 41. The target display unit 42 displays it with an LED lamp.

By means of the tightening order indicator 1, it is possible to reliably prevent the operator from forgetting to tighten the screw, wrong tightening order, or double tightening simply by working the screw to be tightened next according to the display on the visual display unit 42. I can do it.
The specific configuration of the tightening order indicator 1 will be apparent from the transition of the lighting state of the LED lamp shown in FIG.

The LED lamp enables the operator to visually recognize the tightening order of screws by its color and lighting or blinking.
In FIG. 6, each of the 20 small circles on the circumference indicates an LED lamp, and a black dot at the center of the small circle and a filled small circle are displayed in red and blue. Show.

Also, among the small circles with a black dot at the center, those with a black spot at the center of the small circle with the radiant pattern flash red to indicate the tightening position of the next screw, and the center of the small circle without the radiant pattern A black dot indicates the position of the screw waiting for tightening in red.
Among the painted small circles, the painted small circles without a radiant light pattern indicate the position of the screw that has been tightened with blue lighting, and the total number of painted small circles with a radiant light pattern is The complete flashing of a set of screw groups selected by flashing blue is shown.

In FIG. 5, 46 is a control board, 46a is a CPU, 46b is an LED lamp driver, and 46c is a battery.
The operation of the tightening order indicator 1 will be described with reference to the above notation in FIG. 6 for displaying the screw at the next tightening position to the operator.

When the power switch 44 of the display means 4 of the tightening order indicator 1 is turned on and the 6 selection switch 41b is turned on from the selection means (number selection switch) 41, all 20 LED lamps are lit in red. After 1 second, it is lit in blue and a start-up display is made.
One second after the start-up display, the display switches to the first standby display, and a set of six screws is lit in red for every 60 degrees, and the top LED lamp Flashing red indicates to the operator that this corresponds to the tightening order of the screws.

When the operator tightens the wheel nut of the disc wheel 6 indicated by flashing red and the tightening torque of the screw reaches the set torque, the detection means 21 (strain gauge 21a and CPU 21b) generates an arrival signal, and the transmission means 22 The received arrival signal 43 of the tightening order indicator 1 receives the transmitted arrival signal.
When the receiving means 43 of the tightening sequence indicator 1 receives the arrival signal, the display is switched to a one-completion display, the uppermost LED lamp switches from red flashing to blue lighting, and the diagonal LED lamp switches to red flashing. Show to the operator that this is the case in the screw tightening order.

In this way, when all of the set of six screws are completely tightened, all of the six LED lamps are switched to blinking blue so that the operator is surely informed of the completion of the series of operations. -ing
Note that the tightening order is determined in advance so that the tightening order is diagonal, regardless of whether the set of screws to be tightened is 5, 8, or 10. The next tightening order is determined by the operator. Since the operation of the tightening order indicator 1 shown in FIG.

<Modification of Embodiment>
In the above embodiment, the air nutrunner is used as the screw tightening tool, but various power tools and manual tools can be used. In short, the screw tightening torque is detected and an arrival signal is generated and transmitted. It is only necessary that the arrival signal can be transmitted by means.
In the case of using various general-purpose screw tightening tools, a transmission means (transmitter) may be attached and modified so that an arrival signal can be transmitted.

In the above embodiment, the tightening object is a wheel nut arranged at a predetermined pitch in the disc wheel, but it may not be a predetermined pitch. For example, two screws are used as a pair to reduce the pitch. Four pairs of screws may be used.
Moreover, it is good also as a screw which tightens the lid | cover of a pressure vessel or a heat exchanger instead of the screw | thread which clamps a disc wheel as a clamp | tightening object.

In the above embodiment, the predetermined tightening order is the diagonal order. However, when two tightening targets are used as a plurality of pairs, tightening may be performed for each pair of screws.
In the above embodiment, the selection means can select the number of screws from among a set of 5, 6, 8, and 10. However, the selection unit may select from each set including a larger number of screws. In that case, it is important to make it easy for the operator to visually recognize the display on the visual display unit.

In the above embodiment, the description of the screw tightening order is described for the case of one tightening. However, in many cases, the screw tightening is performed in a plurality of times. You may make it display additionally.
In the above embodiment, the LED lamp is used for the visual display unit, but a liquid crystal display may be used instead of the LED lamp.

In the above embodiment, the LED lamp is lit red, lit blue, flashing red, and flashing blue. The tightening transition of a set of screws is displayed. However, the LED lamp is lit in one color, turned off, and flashed. May be.
Furthermore, in the above embodiment, when the arrival signals of all of the set of screw groups are received, the completion of tightening is displayed by the LED lamp (visual display unit). In addition to the display of the LED lamp, A buzzer or sound may be added.

Moreover, although the LED lamp is shared in the above embodiment, it is good also as a dedicated LED lamp, changing a circumference diameter for every set of screw groups.
Furthermore, in the above embodiment, the LED lamp emits light perpendicularly to the surface of the tightening sequence indicator. However, the LED lamp is provided on the cylindrical or inclined side surface and light is emitted to the screw to be tightened. You may make it hit.

  In the above embodiment, the tightening order indicator is installed by the magnet provided at the tip of the three legs that can be put in and out from the back surface of the display means. You may make it install using a hook or a suction cup.

1 Tightening order indicator 2 Screw tightening tool (Air nutrunner)
21 Detection means 22 Transmission means (transmitter)
4 display means 41 selection means (number selection switch)
42 Visual display (LED lamp)
43 Receiving means (receiver)
5 Magnet 51 Leg 6 Disc wheel

Claims (6)

Tightening sequence provided with a display means for displaying a tightening sequence when a plurality of screws to be tightened arranged on the circumference are tightened using a screw tightening tool according to a predetermined tightening sequence An indicator,
The screw tightening tool includes detection means for detecting the arrival of a set torque, and wireless transmission means for transmitting the arrival signal of the detection means to the display means, and the operation is stopped by the arrival signal. And
The display means is a selection means for selecting the number of screws from a plurality of sets of screws with different numbers of screws to be tightened, and a visual display that schematically displays the position of each of the plurality of sets of screws. And receiving means for receiving the arrival signal,
The display means receives the arrival signal for each screw in accordance with a predetermined tightening order selected by the selection means, and displays the tightening position of the next screw on the visual display section. Tightening order indicator characterized by.   The said display means displays the completion | finish of clamping | tightening on the said visual display part, when all the sets of screw groups selected by the said selection means receive the said arrival signal. Tightening order indicator. The tightening object is a wheel nut arranged at a predetermined pitch in the disc wheel,
The predetermined tightening order is such that the tightening position of the next screw is a screw position opposite to the position of the screw that has received the arrival signal. Tightening order indicator. The selection means is capable of selecting the number of screws from among a set of 5, 6, 8 and 10.
In any case, the screw tightening position of each set of screw groups is displayed on the visual display unit at a predetermined pitch based on the number of screws.
The visual display unit is configured to display a total of 20 screw tightening positions using a common display when screw tightening positions between different sets of screw groups coincide with each other. The tightening order indicator according to any one of 1 to 3.   The tightening order indicator according to claim 1, wherein the visual display unit is an LED lamp. The display means is installed in the vicinity of the tightening target by a magnet,
The tightening order indicator according to any one of claims 1 to 5, wherein the magnet is provided at the tip of three legs that can be put in and out of the back surface of the display means.

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