JPH0610479Y2 - Waistcoat for alarm device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a vest device for an alarm device, and more particularly to an alarm device used on a work vehicle side for use at a construction site or maintenance work such as an aircraft. The present invention relates to a waistcoat device for an alarm device that sends a predetermined ultrasonic wave.

[Conventional technology]

During maintenance work such as aircraft or construction sites,
In many cases, various large-parts carrier vehicles or work vehicles such as road rollers work simultaneously in the same work area as workers. Therefore, in order to prevent danger, a back sonar is conventionally attached to a predetermined portion of the work vehicle. When the back sonar detects an abnormal object, it is equipped with an alarm safety means such as immediately issuing an alarm or automatically operating the brake to stop the operation of the work vehicle.

[Problems to be solved by the device]

However, in these operations, the worker often has a long forward leaning posture and a crouching posture. For this reason, the workers often have their eyesight greatly reduced by their own motions. In particular, there was the inconvenience of not being able to always pay attention to the back.

In addition, with regard to back sonar, the detected object is not limited to people, but it may react to structures inside the construction site, such as retaining walls, trees, guardrails, etc., causing alarms and stopping actions more often than necessary. Has occurred. For this reason,
In order to avoid this, the operation of the back sonar must often be stopped.

[Purpose of device]

An object of the present invention is to provide a waistcoat device for an alarm device, which is capable of detecting the presence of a worker on the work vehicle side with high accuracy and reliability.

[Means for Solving the Problems]

In the present invention, a plurality of ultrasonic wave transmitters / receivers are provided on at least the back side of the waistcoat body, and the plurality of ultrasonic wave transmitters / receivers are simultaneously driven with a predetermined frequency. A circuit is provided side by side, and this excitation circuit is equipped with a power supply circuit for driving the excitation circuit. This aims to achieve the above-mentioned object.

[First Embodiment of the Invention] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 8.

The embodiment shown in FIGS. 1 to 5 includes a vest body 1 and an ultrasonic wave transmitting section 5 which is separately mounted on a back side 1A, a front side 1B and a shoulder portion of the vest body 1. Sound wave transmitters / receivers 5a, 5b to 5g, and an excitation circuit 50 for driving each of these ultrasonic wave transmitters / receivers 5a, 5b to 5g.
And a power supply circuit 51 for this excitation circuit.

Between the ultrasonic wave transmitters / receivers 5c to 5f mounted on the back side 1A of the waistcoat main body 1 and the waistcoat main body 1, mounting position changing means 7 for the ultrasonic wave transmitter / receiver is provided as shown in FIG. ing.

On the body of the waistcoat 1, an ultrasonic wave transmitter / receiver 5g is detachably attached to the front chest part, and ultrasonic wave transmitters / receivers 5a and 5b are detachably attached to both shoulder parts. ing.

The ultrasonic transducers 5a and 5b are respectively shown in FIGS.
As shown in the figure, they are attached to both shoulder portions of the vest body 1 via contact plates 6A and 6B, respectively. Patch plate 6A,
The tip of 6B is bent. This bent portion 6a, 6
The ultrasonic wave transmitters / receivers 5a, 5b described above are attached to the adhesive cloth 7A,
Each of them is detachably attached via 7B (registered trademark Velcro).

The ultrasonic wave transmitters / receivers 5c to 5f are attached to the central portion of the back surface of the waistcoat body 1 via the base member 8 and the adhesive cloth 7. Of each of the ultrasonic wave transmitters / receivers 5c to 5f, the ultrasonic wave transmitter / receiver 5c is attached to the base member 8 facing behind. Of the other three, one ultrasonic wave transmitter / receiver 5d is attached in a state of facing downward, and the other two ultrasonic wave transmitters / receivers 5e, 5f are in a state of respectively facing in the left-right direction. It is attached to the member 8 (see FIG. 4).

The base member 8 is attached to the vest body 1 via an adhesive cloth 7 serving as a mounting position changing means.

The portion of the adhesive cloth 7 fixed to the waistcoat body 1 is formed to be relatively large in the vertical direction. As a result, the base member 8 can be changed in its mounting position over a wide range in the vertical direction, can be adapted to the size of the worker who wears it, and can be mounted in accordance with the size of the workplace and the reverse speed of the work vehicle. The height can be changed. Further, the ultrasonic wave transmitter / receiver 5g described above is also detachably attached to the waistcoat body 1 via the adhesive cloth 8E.

The waistcoat body 1 has a belt band 1E for tightening the waist around the waist.

An adhesive cloth 7E is provided on the front portion of the belt zone 1E. The vest body 1 can be detached from the worker P by removing the adhesive cloth 7E.

As described above, the ultrasonic wave transmitting unit 5 mounted on the waistcoat body 1
An excitation circuit 50 for driving the motor and its power circuit 51 (see FIG. 5) are housed in a housing case 1K together with a power switch 52. The storage case 1K can be freely attached to any part of the waistcoat body 1.
Then, when the power switch 52 is connected and the excitation circuit 50 is activated, the ultrasonic wave transmitters / receivers 5a to 5g forming the ultrasonic wave transmitter 5 output ultrasonic waves of a predetermined frequency all together. Has become.

These ultrasonic waves output from the worker P side are transmitted to the work vehicle 2
It is supposed to be received on the side.

The ultrasonic wave reception means 4 included in the work vehicle 2 includes an ultrasonic wave reception unit 11 including at least three ultrasonic wave transmitters / receivers 11A, 11B, and 11C, and the signal processing circuit 12 shown in FIG. Alternatively, an alarm circuit unit 13 including an alarm speaker and the like is configured so that the distance between the ultrasonic wave source (the vest body 1 in this embodiment) and the work vehicle 2 can be obtained using a transponder method or the like. Further, the brake stop control circuit section 14 is provided.

Next, the operation of the first embodiment will be described with reference to FIG.

When the ultrasonic wave receiver 11 of the work vehicle 2 detects that the work vehicle 2 is approaching the worker P and that the worker P is within a predetermined distance, signal processing is performed. The alarm circuit unit 13 is activated via the circuit 12, and the worker P is informed of the danger. Thereby, the worker P can know that the work vehicle 2 is closer to himself and can avoid the danger.

In this case, the worker P is working in various postures as shown in FIG. However, in any case, since the output of any one of the above-described ultrasonic wave transmitters / receivers 5a to 5g is received by the ultrasonic wave receiver 11 of the work vehicle 2, there is a risk in advance. Can be effectively avoided.

As described above, according to the present embodiment, since the ultrasonic wave is constantly output from the waistcoat body 1, the work vehicle can always receive the ultrasonic wave, and therefore, when the worker P enters the dangerous area. It is possible to immediately and quickly catch this and issue an alarm by the alarm circuit unit 13 or activate the brake stop control circuit unit 14, so that the worker P
Can inform the work vehicle side of its own existence by ultrasonic output from its own side without the need for danger monitoring of other workers, and in some cases, can output a signal to stop the work vehicle. There is an advantage that you can.

In addition, in the present embodiment, since the waistcoat body 1 is equipped with a plurality of ultrasonic transducers,
It is possible to equip more than 10 or more or more than 10 ultrasonic wave transmitters / receivers, and since the weight of the ultrasonic wave is received by the worker P throughout the body, there is no particular feeling of weight, and smooth work is performed. Since many ultrasonic wave transmitters / receivers are operated at the same time, the worker P can reliably and accurately operate the alarm device on the work vehicle side regardless of the posture of the worker P. An alarm signal (ultrasonic wave) indicating the presence of the worker P can be sent toward the work vehicle, and the work vehicle side is equipped with any one of the three ultrasonic wave transmitters / receivers 11A, 11B, 11C. However, there is an advantage that the ultrasonic wave from the worker P side can be sufficiently received.

Further, the action of the adhesive cloth 7 as the attachment position changing means can change the equipment positions of the ultrasonic wave transmitters / receivers 5c to 5f. Therefore, the ultrasonic wave can be set to a high position and the ultrasonic wave can be transmitted to a distant place. There is an advantage that it is easy to transmit effectively.

Here, in the first embodiment, as the ultrasonic wave transmitters / receivers 5a to 5g equipped on the vest body 1 on the worker side, ultrasonic wave transmitters dedicated to transmission may be used. At the same time, work vehicle 2
Side ultrasonic wave transmitter / receiver 11 of the ultrasonic wave transmitter / receiver 11A, 11
B and 11C may use the ultrasonic wave receiver only for reception.

FIG. 7 shows a modified example of FIG. 4, and shows a case where an ultrasonic wave transmitter / receiver 5h is additionally provided in an obliquely upward direction in FIG. Reference numeral 8A indicates a base member in this case. FIG. 8 shows the usage state of FIG.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. 9 to 10.

In FIGS. 9 to 10, reference numeral 41 denotes a search ultrasonic wave transmitting / receiving unit which is mounted on the work vehicle 2 and outputs target object search ultrasonic waves. Further, reference numeral 19 is operated when the ultrasonic wave from the ultrasonic wave transmitting / receiving unit 41 for searching, which is mounted on the target object (vest body 1) of the worker P, is received, and the frequency of the received signal is The ultrasonic wave transmitting / receiving means 19 for returning ultrasonic waves for outputting ultrasonic waves for returning different frequencies is shown.

The reply ultrasonic wave transmitting / receiving means 19 equipped on the waistcoat body 1 worn by the worker P includes an ultrasonic wave transmitting / receiving unit 5 having a plurality of wide band ultrasonic wave transmitters / receivers 5 _{1 to} 5 _n, and ultrasonic wave transmitting / receiving units. Transmitter / receiver circuit 20 on the reply side, which is attached to the vessels 5 _{1 to} 5 _n
And a power supply circuit 51 and a power supply switch 52 for the transmission / reception circuit 20.

Among them, the transmitting / receiving circuit 20 on the reply side has a switching circuit 21 as an automatic switching device, an exciting circuit 50 connected to one connection terminal 21a of the switching circuit 21, and the other connection terminal 21b of the switching circuit 21. An amplifier circuit 23 and a reception discriminating circuit 24 which are connected in series with each other, and the reception discriminating circuit 24.
It is constituted by a control circuit 25 which is activated by being actuated to switch the switching circuit 21 from the side of the excitation circuit 50 to the side of the amplification circuit 23, and an alarm device 50A attached to the excitation circuit 50.

The reception discriminating circuit 24 transmits ultrasonic waves of a predetermined level from the ultrasonic wave transmitting / receiving section 41 for search equipped with the reply ultrasonic wave transmitters / receivers 5 _{1 to} 5 _n equipped in the waistcoat body 1 to the work vehicle 2. It has a function of operating immediately when received and outputting a predetermined operation command signal to the control circuit 25.

The excitation circuit 50 outputs an ultrasonic wave having a frequency different from that of the search ultrasonic wave output from the above-described search ultrasonic wave transmission / reception unit 41 for the return ultrasonic wave transmission / reception devices 5 _{1 to} 5 _n. Is configured.

Further, the alarm device 50A is adapted to be activated at the same time when the above-mentioned excitation circuit 50 is activated. This alarm device 50A allows the worker P to know in advance that the work vehicle 2 is moving in a direction closer to himself, before entering the dangerous area of the work vehicle 2, and thus, for example, the work vehicle 2 side. It is possible to effectively avoid the occurrence of a panic condition that occurs when an alarm is suddenly received from.

In the present embodiment, the search ultrasonic wave transmitter / receiver unit 41 provided in the work vehicle 2 has three ultrasonic wave transmitters / receivers 41A and 41A.
B, 41C. These three ultrasonic wave transmitters / receivers 41A, 41B, 41C are mounted on one surface of the work vehicle 2 at equal intervals and at the same height, as shown in FIG. Of these, the outer ultrasonic transducer 41
A and 41C are installed inward so that the outer boundary line of the spread of the directivity is substantially parallel to the moving direction of the work vehicle 2 such as a roller wheel as shown in FIG. The three ultrasonic wave transmitters / receivers 41A, 41B, 41C are designed to be driven in parallel by a transmitter / receiver circuit 30 attached to the transmitters / receivers 41A, 41B, 41C.

The transmission / reception circuit 30 on the side of the work vehicle 2 receives a transducer ultrasonic wave excitation function for simultaneously exciting three ultrasonic wave transmitters / receivers 41A, 41B, 41C at a predetermined frequency, and a return ultrasonic wave signal from the worker P side. In this case, a reception confirmation function for confirming that it is a return ultrasonic signal from the target object is provided.
The transmission / reception circuit 30 on the transmission side is provided with a signal processing circuit 31.

The signal processing circuit 31 calculates the arrival time of the reception signal confirmed by the transmission / reception circuit 30 on the transmission side (work vehicle 2 side) with reference to the operation time of the ultrasonic wave transmitters / receivers 41A, 41B, 41C described above. And a warning function 32 and the roller wheel 2 by outputting a predetermined control signal when the calculated distance of the target object is within the dangerous distance S.
And a second function for activating the brake control means 33 and the like.

The other structure is the same as that of the first embodiment described above.

Next, the overall operation of the second embodiment will be described.

First, when the entire apparatus enters the operating state, the excitation signal of a predetermined frequency output from the transmitting / receiving circuit 30 on the transmission side (work vehicle 2 side) is sent to the ultrasonic wave transmitting / receiving section 41 for search, and the three ultrasonic waves are transmitted. The sound wave transmitters / receivers 41A, 41B, 41C are simultaneously operated, and as shown in FIG. 10, search ultrasonic waves are simultaneously output from the work vehicle 2 side. Ultrasonic wave transmitter / receiver 41 for this search
The ultrasonic output states of A, 41B, and 41C are switched to the ultrasonic wave reception state after a certain period of time by the action of the transmission / reception circuit 30.

Before or after this switching operation, when the reply ultrasonic wave transmitting / receiving means 19 on the waistcoat main body 1 side receives the search ultrasonic wave,
Immediately, the reception determination circuit 24 outputs an operation command signal for operating the control circuit 25. The output of the operation command signal causes the control circuit 25 to operate to cause the switching circuit 21 to perform a switching operation, and the excitation circuit 50 to return the ultrasonic wave transmitters / receivers 5 _{1 to} 5 5.
connect to _n . As a result, from the ultrasonic wave transmitters / receivers 5 _{1 to} 5 _n , for example, reply ultrasonic waves having a frequency different from that of the above-described search ultrasonic waves are output.

The ultrasonic wave for reply is an ultrasonic wave transmitter / receiver 41 of any one of the ultrasonic wave transmitter / receiver 41 for search on the side of the work vehicle 2 in the receiving state.
Transmitter / receiver circuit 30 detected by A, 41B and 41C
It is confirmed that it is an ultrasonic wave for reply. This received signal is waveform-shaped and sent to the signal processing circuit 31. In the signal processing circuit 31, the arrival time is calculated as described above,
It is determined whether or not the target object (worker P) is within the dangerous distance S. When the target object (worker P) is within the danger distance S, the signal processing circuit 31 immediately outputs a predetermined signal to activate the alarm means 32, and at the same time operates the brake control means 33 of the work vehicle 2. Stop control.

On the other hand, regardless of whether or not the worker P is in the dangerous area S, the alarm device 50A on the waistcoat main body 1 side includes the excitation circuit 5A.
It operates at the same time as the start of operation of 0 and issues a predetermined alarm. In this case, the excitation circuit 50 is the body of the waistcoat 1 as described above.
When the search ultrasonic wave from the work vehicle 2 is detected at a predetermined level on the side, the function is performed for the first time. Thereby, the worker P
Can know that the work vehicle 2 is moving in a direction approaching himself even before the position where he / she exists is in the dangerous area S. Therefore, even if the work vehicle 2 suddenly gives an alarm, no panic occurs. It is possible to get out of the dangerous area S with a margin without falling into. Therefore, the alarm device 50A on the side of the worker P is important as an output means of the danger prediction signal.

Further, in this embodiment, since the worker (target) P wearing the waistcoat body 1 outputs ultrasonic waves of different frequencies, malfunctions due to reflected waves from other foreign matter are effectively eliminated. When the worker P is located within the dangerous distance, the alarm can be immediately issued on the side of the work vehicle 2 regardless of its coordinate position, which causes a malfunction due to a fence or a telephone pole as in the past. There is an advantage that the inconvenience is eliminated, and therefore the work efficiency at the construction site can be improved while ensuring the safety of the worker P.

Further, since the waistcoat main body 1 receives the weight of the whole body, it can be sufficiently put into practical use even if the capacity and the number of ultrasonic wave transmitters / receivers are increased, and the power source for driving the waistcoat main body 1 can be improved. This has the advantage that the capacity can be increased, which makes it possible to quickly respond to work vehicles having a relatively high reverse speed.

Other configurations and operational effects are the same as those of the first embodiment described above.

Next, a mounting example of other ultrasonic wave transmitters / receivers common to the above-described first and second embodiments and the function and effect thereof will be described.

FIG. 11 shows a case where the ultrasonic wave transmitter / receiver 5S is provided on the back portion of the waistcoat body 1 so that the communication surface (transmission / reception surface) thereof is normally oriented downward.

When a worker lifts a heavy load, he or she should first lower his head and then raise his buttocks.

At this time, the ultrasonic wave transmitters / receivers capable of effective communication are limited to those shown in FIG. In this respect,
The thing of this FIG. 11 functions effectively.

FIG. 12 shows the case where the ultrasonic wave transmitter / receiver 5S and the ultrasonic wave transmitter / receiver 5S are attached to the lower left and right flanks of the waistcoat body 1, respectively.

In the case where the worker P falls and suffers a wound that cannot be immediately raised, it depends on the direction, but in the case of each of the above-described embodiments, any of the ultrasonic transducers 5a to 5h is used.
In the case where communication becomes impossible, that is, the case shown in FIG. 13 occurs. In such a case, the equipment example of FIG. 13 has an advantage that the ultrasonic wave transmitter / receiver 5S in the lower flank can be activated immediately to surely inform the work vehicle 2 of the presence of the worker P.

FIG. 14 shows a case where the ultrasonic transducer 5S is attached to the upper and lower portions of the back of the waistcoat body 1.

The example in this case is suitable for the second embodiment shown in FIGS. 9 to 10 described above. That is, the ultrasonic waves sent from the work vehicle 2 generally have a main lobe and side lobes. Then, depending on the frequency used or the shape of the transmitter that outputs ultrasonic waves, a portion with extremely low sensitivity, that is, a blind spot may occur between the main lobe and the side lobe. For this reason, if the ultrasonic transducers 5S are separately provided at positions where the dead angle is removed, for example, at the upper and lower positions shown in FIG.
Can reliably catch the ultrasonic waves output from the work vehicle 2 and can communicate with each other.

As described above, since the vest body 1 has a large mounting area and the operator P feels little weight, it is possible to mount a large number of ultrasonic wave transmitters / receivers. Work vehicle 2 even in posture
There is an advantage that the ultrasonic transmitter / receiver can be mounted at a position where communication with the ultrasonic transmitter / receiver is possible.

[Effect of device]

Since the present invention is configured and functions as described above, according to this, when the work vehicle is approaching or approaching the worker during movement of the work vehicle at the construction site, the work vehicle outputs the output from the worker side. It is possible to recognize that a worker is present in the traveling direction ahead of the work vehicle by the predetermined ultrasonic signal that is generated, and therefore, the work vehicle side issues a predetermined alarm based on the ultrasonic signal from the worker side. It is possible to take certain measures to avoid danger, such as issuing a warning, changing the course, or applying a brake. Also, an alarm from the work vehicle side allows the worker to confirm that he is in the dangerous area. A non-conventional alarm device checker that can be recognized without requiring personnel's danger monitoring, and therefore can escape from the danger zone with a margin before the work vehicle approaches. It is possible to provide a device.

Further, in the present invention, since the ultrasonic transmitter / receiver on the body of the vest can be mounted on the body of the vest via the mounting position changing means, the mounting position of the ultrasonic transmitter / receiver can be adjusted to any height according to the height of the worker. Therefore, it is possible to variably equip the device, and thus it is possible to effectively eliminate the inconvenience such as the decrease in output sensitivity (due to the shift in directivity) due to the difference in height of the workers.

Further, in the present invention, when the worker side captures the search ultrasonic wave output from the work vehicle side, the worker side outputs a predetermined ultrasonic wave (for reply) toward the work vehicle side. Since the vest body side can be equipped with the automatic changeover switch means for changing the transmission mode as described above, the work vehicle side can receive a highly sensitive signal unlike the conventional reflection type, and therefore it is easy to distinguish from noise. Therefore, it is possible to more reliably recognize the presence of the worker, and therefore it is possible to quickly and surely perform the danger avoidance operation.

Furthermore, in the present invention, the automatic changeover switch means for changing the transmission mode described above is provided on the body of the vest, and an alarm device that operates at the same time as outputting a predetermined ultrasonic wave (for reply) to the work vehicle side is provided. ， Because it can be equipped on the body of the vest, the worker can know in advance that the work vehicle is approaching to the worker. Therefore, when the worker enters the dangerous area of the work vehicle It is possible to take a risk avoidance action with a sufficient margin without causing a panic even with respect to an alarm that is given.

Furthermore, in the present invention, since the weight of the body of the vest and the accessories are adapted to be received by the entire body of the worker, it is possible to equip a large number of ultrasonic transmitters / receivers. Regardless of the posture in which the worker is working, it is possible to reliably transmit a predetermined ultrasonic wave toward the work vehicle, which makes it possible to install an ultrasonic wave transmitter / receiver on the work vehicle side. It has the effect that it can be a single piece.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention, FIG. 2 is a rear view of FIG. 1, and FIG. 3 is a perspective view showing a backing plate equipped with ultrasonic transducers mounted on both shoulders. 4 and 5 are perspective views showing an ultrasonic wave transmitter / receiver and a base member thereof mounted in the center of the back surface, FIG. 5 is a block diagram showing the entire circuit of the embodiment according to FIG. 1, and the work of FIG. FIG. 7 is a perspective view showing another example of the base member portion, FIG. 8 is an explanatory view showing a usage state of FIG. 7, and FIG. 9 is a second embodiment. Block diagram, FIG. 10 is an explanatory diagram showing the working condition and operation of the worker in the second embodiment, and FIGS. 11 to 14 are explanatory diagrams showing another example of equipment of the ultrasonic transmitter / receiver and its operation. Is. 1 ... Vest main body, 5 ... Ultrasonic wave transmitter, 5a, 5
b, 5c, 5d, 5e, 5f, 5g, 5h ... Ultrasonic wave transmitter / receiver, 5 _{1 to} 5 _n ... Ultrasonic wave transmitter / receiver, 7 ... Adhesive cloth as mounting position changing means, 21 ... Automatic Switching circuits as changeover switch means, 41A to 41C ... Ultrasonic wave transmitter / receiver, 50 ... Excitation circuit, 51 ... Power supply circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuya Ishii 2-16-46 Minami-Kamata, Ota-ku, Tokyo Tokyo Keiki Co., Ltd. (72) Inventor Yoichi Hirokawa 2-16-46 Minami-Kamata, Ota-ku, Tokyo Tokyo Keiki Co., Ltd. (72) Inventor Yukio Yoshida 2-1646 Minami-Kamata, Ota-ku, Tokyo Tokyo Keiki Co., Ltd. (72) Inventor Takashi Takano 1-19-11 Kyobashi, Chuo-ku, Tokyo Japan Tamaido Co., Ltd. (72) Creator Tomohiro Gomachi 1-19-11 Kyobashi, Chuo-ku, Tokyo Japan Tappo Co., Ltd. (72) Creator Tomohiko Tanaka 1-1-19, Kyobashi, Chuo-ku, Tokyo Stocks of Japan Tamaido Inside the company (72) Imamasa Yamabe 1-19-11 Kyobashi, Chuo-ku, Tokyo Japan Happo Co., Ltd. (72) Yoshimitsu Hashimoto 1-19-11 Kyobashi, Chuo-ku, Tokyo Japan Tamaido Stock Association The inner

Claims (4)

[Scope of utility model registration request] 1. A waistcoat main body is equipped with a plurality of ultrasonic wave transmitters / receivers at least on the back side thereof, and the plurality of ultrasonic wave transmitters / receivers are simultaneously driven at a predetermined frequency. A waistcoat device for an alarm device, which is provided with an excitation circuit and is equipped with a power supply circuit for driving the excitation circuit. 2. A waistcoat main body is provided with a plurality of ultrasonic wave transmitters / receivers at least on the back surface side, and the plurality of ultrasonic wave transmitters / receivers are simultaneously driven with a predetermined frequency. Along with an excitation circuit, the excitation circuit is equipped with a power supply circuit for driving the excitation circuit, and the ultrasonic wave transmitter / receiver is provided between the ultrasonic wave transmitter / receiver on the back side of the waistcoat body and the waistcoat body. A vest vest for a warning device, which is equipped with a mounting position changing means. 3. A waistcoat main body is provided with a plurality of ultrasonic wave transmitters / receivers at least on the back side, and the plurality of ultrasonic wave transmitters / receivers are simultaneously driven with a predetermined frequency. Along with an excitation circuit, the excitation circuit is equipped with a power supply circuit for driving the excitation circuit, and the ultrasonic transmitter / receiver is normally placed in a reception mode between the ultrasonic transmitter / receiver and the excitation circuit. A waistcoat device for an alarm device, which is equipped with automatic changeover switch means for setting and setting a signal of a predetermined frequency from the outside to immediately switch to a transmission mode. 4. A waistcoat main body is equipped with a plurality of ultrasonic wave transmitters / receivers at least on the back side thereof, and the plurality of ultrasonic wave transmitters / receivers are simultaneously driven at a predetermined frequency. Along with an excitation circuit, the excitation circuit is equipped with a power supply circuit for driving the excitation circuit, and the ultrasonic transmitter / receiver is normally placed in a reception mode between the ultrasonic transmitter / receiver and the excitation circuit. For an alarm device characterized by being equipped with automatic changeover switch means for setting and setting a signal of a predetermined frequency to immediately switch to a transmission mode, and an alarm device that operates simultaneously with the excitation circuit is provided in the excitation circuit. Waistcoat device.