JP2002121000A - Alarm sound transmitter for industrial vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an alarm sound transmitter for an industrial vehicle that, in an industrial vehicle such as a forklift, improves the content of an alarm sound transmitted at reverse travel and a transmitting means for the alarm sound, and can prevent a collision accident of the vehicle and a person or an object especially just after a start of reverse travel of the vehicle and realize safe reverse travel. SOLUTION: The alarm sound transmitter for an industrial vehicle generates an alarm sound upon a reverse selection by a forward/reverse selecting lever for reverse vehicle travel and transmits the alarm sound via a speaker. An alarm sound generating means is provided to generate a high-frequency alarm sound and send it to the speaker for a fixed period after the start of reverse vehicle travel, and after transmitting the high-frequency alarm sound, generate one or more types of low-frequency alarm sound and send them to the speaker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a forklift,
The present invention relates to an alarm sound transmission device for an industrial vehicle that is applied to an industrial vehicle such as a construction machine, generates an alarm sound in accordance with reverse switching of a forward / reverse switching lever when the vehicle travels backward, and transmits the alarm sound via a speaker.

[0002]

2. Description of the Related Art Forklift trucks travel very frequently when operating at a cargo handling place inside or outside a factory or indoors, and the rate of occurrence of a collision accident with a person or an object during such backward travel is higher than when traveling forward. And much more. Normal,
The back alarm buzzer emits a sound of a fixed sound pressure at a fixed frequency from a speaker attached to the rear of the forklift, and transmits the sound to a person at the rear or side of the vehicle to call attention.

[0003]

According to statistics, during the operation of such a forklift, a collision accident between the vehicle and a person or an object occurs immediately after the forklift switches the forward / reverse switching lever to reverse and starts reverse traveling. It occurs most frequently in a time period of about 5 seconds. One of the causes is that the back alarm buzzer emitted from the speaker during reverse travel always has a constant frequency and a constant sound pressure during reverse travel, so that people at the rear or side of the vehicle get used to the ear, and It is difficult to distinguish between immediately after the start and during the continuous reverse running, so that special attention is not paid to the change in the running direction of the vehicle from the forward to the reverse. However, at present, no effective solution has been proposed for the cause of the accident immediately after the start of reverse travel as described above.

The present invention has been made in view of the problems of the prior art,
In an industrial vehicle such as a forklift, by improving the content of the alarm sound transmitted when the vehicle is traveling backward and the means for transmitting the alarm sound, it is possible to prevent the occurrence of a collision accident between the vehicle and a person or an object immediately after the vehicle starts traveling backward. It is another object of the present invention to provide an alarm sound transmission device for an industrial vehicle that can realize safe reverse traveling.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to an invention as set forth in claim 1, wherein an alarm sound is generated in accordance with reverse switching of a forward / reverse switching lever when the vehicle is traveling backward, and the alarm sound is generated. In an industrial vehicle alarm sound transmission device that transmits via a speaker, a high-frequency high-frequency alarm sound is generated and sent to the speaker for a certain period from the time when the vehicle starts moving backward, and the high-frequency alarm sound is transmitted from the speaker. An alarm sound transmission device for an industrial vehicle, further comprising: an alarm sound generation unit that generates one or more types of low-frequency alarm sounds having a frequency lower than the high-frequency alarm sound after the transmission and sends the low-frequency alarm sound to the speaker. suggest.

According to a second aspect of the present invention, in the first aspect, a timer device for setting a transmission time of the high-frequency alarm sound and the low-frequency alarm sound from the speaker, and the timer device sets the transmission time during the time set by the timer device. An oscillator for continuously transmitting a high-frequency alarm sound and a low-frequency alarm sound. In claim 2, preferably, as in claim 3, the timer device transmits the high-frequency alarm sound to the oscillation device for a predetermined time,
The low-frequency alarm sound is continuously transmitted.

According to the invention, the timer device constituting the alarm sound generating means is combined with the oscillation device which emits an alarm sound of a different frequency, and the fixed time set by the timer device from the time when the vehicle starts running backwards. Within, the highest frequency alarm sound is transmitted from the oscillating device via a speaker, and after the lapse of the predetermined time, the oscillating device transmits a relatively low frequency alarm sound similar to the conventional one,
Aural changes can be made by changing the frequency of the alarm sound when the vehicle is moving backwards, and usually within a certain period of time immediately after the vehicle starts moving backwards, which is the most frequent collision accident between the vehicle and a person or object. By transmitting a high frequency alarm sound, the hearing can be strongly stimulated. As a result, the alarm sound can draw attention to a person at the rear or side of the vehicle, the vehicle can be reliably recognized as approaching, and the occurrence of collision accidents between the vehicle and people can be reduced. it can.

According to a fourth aspect of the present invention, there is provided an alarm sound transmitting apparatus for an industrial vehicle which generates an alarm sound in accordance with reverse switching of a forward / reverse switching lever when the vehicle travels backward and transmits the alarm sound via a speaker. A high-frequency side frequency and a sound pressure storage unit in which the frequency of the frequency alarm sound is set individually or in combination with the sound pressure; and one or more types of frequencies lower than the set values of the high-frequency side frequency and the sound pressure storage unit The frequency of the alarm sound is set individually or in combination with the sound pressure on the low frequency side, the sound pressure storage means, and the high frequency side frequency, the sound pressure storage means or the low frequency side together with the reverse switching of the forward / reverse switching lever. A frequency / sound pressure switching device for switching a connection between a frequency / sound pressure storage means and an oscillation device for transmitting the alarm sound.

According to this invention, the frequency and sound pressure switching device can freely switch between the high frequency side alarm sound on the sound pressure storage means side and the low frequency side frequency alarm sound on the sound pressure storage means side. Thus, it is possible to easily select an alarm sound transmission mode that minimizes the frequency of occurrence of collision accidents between the vehicle and a person or an object, and it is possible to more reliably recognize the approach of the vehicle.

According to a fifth aspect of the present invention, there is provided an industrial vehicle alarm sound transmitting device for generating an alarm sound in accordance with reverse switching of a forward / reverse switching lever when the vehicle is traveling backward and transmitting the alarm sound via a speaker. First language storage means in which a language for notifying the vehicle of backward travel is set as an alarm sound, and second language storage means in which a language having a frequency lower than a set value of the first language storage means is set. And a language switching device for switching the connection between the first language storage means or the second language storage means and the oscillation device that emits the alarm sound together with reverse switching of the forward / reverse switching lever. And According to this invention, a high frequency and a language that means a sudden approach of a vehicle and a low frequency and a language with a slow tone are properly used, so that a sudden approach of a vehicle can be realistically given to a person at the rear or side of the vehicle. Can communicate.

According to a sixth aspect of the present invention, there is provided an alarm sound transmission device for an industrial vehicle which generates an alarm sound in accordance with reverse switching of a forward / reverse switching lever when the vehicle travels backward and transmits the alarm sound via a speaker. As one alarm sound, the frequency of the high-frequency alarm sound is set individually or in combination with the sound pressure on the high-frequency side, the sound pressure storage means, and the high-frequency side, the frequency higher than the set value of the sound pressure storage means. One or more low alarm frequencies are set individually or in combination with the sound pressure. The low-frequency side, the sound pressure storage means, and the high-frequency side, the sound pressure together with the reverse switching of the forward / reverse switching lever. A frequency and sound pressure switching device for switching a connection between a memory means or a low frequency side frequency, a sound pressure storage means and an oscillator for transmitting the alarm sound; As the second alarm sound, a first language storage unit in which a language for notifying the vehicle of backward travel is set, and a language having a different warning level from the set value of the first language storage unit is set. Second linguistic storage means,
A language switching device for switching the connection between the first language storage means or the second language storage means and the oscillation device that emits the alarm sound together with reverse switching of the forward / reverse switching lever; An alarm sound transmission control device for simultaneously transmitting and alternately transmitting a combination of an alarm sound and the second alarm sound is provided. According to this invention, by simultaneously transmitting the mechanical alarm sound and the linguistic alarm sound in a combined manner, or by alternately transmitting the combined sounds, it becomes possible for the human to more effectively recognize the sense of crisis.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. It's just

FIG. 1 is a control block diagram of an alarm sound transmission device in a forklift according to a first embodiment of the present invention,
FIG. 2 is a diagram showing an alarm sound transmission device according to a second embodiment.
FIG. 3 is a corresponding diagram of FIG. 1 showing an alarm sound transmitting device according to a third embodiment, FIG. 4 is a corresponding diagram of FIG. 1 showing an alarm sound transmitting device of a fourth embodiment, and FIG. FIG. 6 is an alarm sound wave diagram in the second embodiment, and FIG. 7 is a side view of a forklift to which the present invention is applied.

In FIG. 7 showing the overall structure of a forklift to which the present invention is applied, 20 is a vehicle body, 21 is a lifting mast for lifting and lowering luggage, 22 is a fork, 23 is a steering handle, 24 is a head guard, and 25 is wheels , 26 are driver's seats. Reference numeral 1 denotes a forward / reverse switching lever for switching between forward (F), neutral (N), reverse and (R) of the vehicle. Reference numeral 5 denotes a loudspeaker attached to a rear portion of the vehicle body, and when the forward / backward switching lever 1 is switched to reverse. An alarm sound is transmitted from the speaker 5 by means described later.

The present invention relates to a means for controlling the generation and transmission of an alarm sound transmitted from the speaker 5 when the forklift is traveling in reverse. In FIG. The switching lever 2 is a timer operation command device that commands the operation of a timer device 3 described later simultaneously with the reverse switching of the forward / reverse switching lever 1. Reference numeral 3 denotes a timer device, which sets the operation time of each of the oscillating devices 4a, 4b, and 4c to be described later (transmission time of an alarm sound). Reference numerals 4a, 4b, and 4c denote oscillators that emit alarm sounds having different frequencies or periods, respectively.
Alarm sounds from a, 4b and 4c are transmitted to the speaker 5.

In the alarm sound generation and transmission control means having such a configuration, when the forward / reverse switching lever 1 is switched to reverse, the timer operation command device 2 is transmitted to the timer device 3 at the same time as the vehicle starts running backward. Command operation. The timer device 3 has a transmission time of an alarm sound transmitted from the oscillation device 4a, a transmission time of an alarm sound transmitted from the oscillation device 4b, and a transmission time of an alarm sound transmitted from the oscillation device 4c. The time is set continuously for each.

As shown in FIG. 5A, the alarm sound generated and transmitted by the oscillating device 4a has a cycle of S ₁ (the frequency is 1 / S ₁ ) and a sound pressure of P ₁ . This is a high-frequency alarm sound, which is generated by the timer device 3
Reverse switching straight after _{t 1} hour _(t 1 = about 5 seconds) it is transmitted by. Subsequently, t set in the timer device 3 is set.
₂ hours, as shown in FIG. 5 (B), the period _{S 2}
(Hence the frequency 1 / S _2), the sound pressure alarm sound intermediate frequency P ₂ is transmitted from the oscillator 4b. Subsequently, as shown in FIG. 5C, the cycle is S ₃ (the frequency is 1 / S ₃ ), and the sound pressure is t ₃ time (until the end of reverse running) set in the timer device 3. There low frequency alarm sound P ₃ is transmitted from the oscillator 4c. These alarm sounds are transmitted to the speaker 5,
The signal is transmitted from the speaker 5 to the periphery of the forklift.
The operation shifts from transmission of a high-frequency alarm sound (FIG. 5A) from the oscillation device 4a to transmission of a low-frequency alarm sound (FIG. 5C) from the oscillation device 4c. Intermediate frequency alarm from 4b (Fig. 5 (B))
May be omitted.

According to this embodiment, the oscillating devices 4a, 4a,
b, 4c, and within a certain time set by the timer device 3 from the time when the forward / reverse switching lever 1 of the forklift is switched to reverse and the reverse start is started,
An alarm sound of the highest frequency is transmitted from the oscillation device via the speaker 5, and after the lapse of the predetermined time, an alarm sound of a relatively low frequency similar to the conventional one is transmitted from the oscillation devices 4a, 4b, and 4c. Aural changes can be made by changing the frequency of the alarm sound when the vehicle is moving backwards, and usually within a certain period of time immediately after the vehicle starts moving backwards, which is the most frequent collision accident between the vehicle and a person or object. By transmitting a high frequency alarm sound, the hearing can be strongly stimulated. This allows the alarm sound to alert people at the rear or side of the vehicle,
The approach of the vehicle can be reliably recognized, and the occurrence of a collision accident between the vehicle and a person can be reduced.

In the second embodiment shown in FIG. 2, reference numeral 6 denotes a frequency and sound pressure switching device for simultaneously or individually switching the frequency and sound pressure of the alarm sound transmitted from the speaker 5. 7a, 7b, 7c are frequencies (that is, periods)
Frequency and sound pressure memory for storing alarm sounds having different sound pressures, the frequency and sound pressure memory 7a have the highest frequency, the frequency and sound pressure memory 7c have the lowest frequency, and the frequency and sound pressure memory 7b have the intermediate frequency. The alarm sound is stored in combination with the sound pressure, or the respective frequencies and sound pressures are individually stored. Reference numeral 8 denotes an oscillating device for transmitting the alarm sound.
Is to be transmitted.

In the second embodiment, when the forward / reverse switching lever 1 is switched to reverse, the frequency and sound pressure switching device 6 is activated at the same time when the vehicle starts running backward. Said frequency, the sound pressure memory 7a, as shown in FIG. 6 (A), the cycle _{S 1} (hence the frequency 1 _{/ S} 1), the sound pressure is high frequency alarm sound _{P 11} and _{P 12} Is set, and the frequency and the sound pressure memory 7 are set by the frequency and sound pressure switching device 6 at time t ₁ (t ₁ = about 5 seconds) immediately after the reverse switching.
When the oscillation device 8 is connected to a, the more oscillation device 8 high frequency alarm sound is transmitted t ₁ hour.

The frequency and sound pressure memory 7b includes:
As shown in FIG. 6B, an alarm sound whose cycle is S ₂ (the frequency is 1 / S ₂ ) and an intermediate frequency between sound pressures P ₂₁ and P ₂₂ is set, and the frequency and sound pressure switching device are set. 6, the frequency and sound pressure memory 7b and the oscillation device 8
When bets are connected, the alarm sound of the intermediate frequency from the oscillating unit 8 is transmitted t ₂ hours. Furthermore, the frequency, the sound pressure memory 7c, as shown in FIG. 6 (C), the period _{S 3} (hence the frequency 1 _{/ S} 3), the sound pressure is low frequency alarm sound _{P 31} The frequency and the sound pressure memory 7c are set by the frequency and sound pressure switching device 6.
Wherein the oscillation device 8 is connected, the more oscillation device 8 low frequency alarm sound is issued t ₃ hours with.

The high frequency alarm sound stored in the frequency and sound pressure memory 7a by the oscillator 8 (FIG. 6)
From the transmission of (A)) to the transmission of the low-frequency alarm sound (FIG. 6C) stored in the frequency and sound pressure memory 7c, the transmission of the frequency and the intermediate frequency stored in the sound pressure memory 7b is started. The transmission of the alarm sound (FIG. 6B) may be omitted.

According to this embodiment, the high frequency side frequency, the frequency constituting the sound pressure storage means, the alarm sound on the sound pressure memory 7a side, the low frequency side frequency, the sound pressure storage means by the frequency and sound pressure switching device 6 are provided. Frequency and sound pressure memory 7c
It is possible to freely switch between the alarm sound on the side (or the frequency and sound pressure memory 7b side), and easily select an alarm sound transmission mode that minimizes the frequency of collision accidents between the vehicle and a person or an object. This makes it possible to more reliably recognize the approach of the vehicle.

In the third embodiment shown in FIG.
Is a relatively strong warning with features such as high frequency, fast tempo and rhythm, strong sound pressure, etc. so that the language that notifies the person of the backward movement of the vehicle as an alarm sound can warn and perceive the danger to the person strongly. A first language memory 11 for storing a first language set in a voice language that emits a sexuality, a language for notifying a person of the backward traveling of the vehicle as an alarm sound makes danger to the person relatively mild. To warn and perceive,
A second language set in a speech language that emits a relatively gentle warning having characteristics such as a relatively lower frequency, a relatively slow tempo and rhythm, and a relatively weak sound pressure than the language set in the first language memory 10. 2 language memory, 12 is the speaker 5
An oscillation device for transmitting the language from the language memory 10 or 11 to the language memory 9 is a language switching device for switching the connection between the language memory 10 or 11 and the oscillation device 12.

In the third embodiment, when the forward / reverse switching lever 1 is switched to the reverse, the language switching device 9 is activated at the same time as the vehicle starts to run backward, so that the vehicle is kept at a fixed time from the time when the vehicle starts running backward. During the time, the first language memory 10 and the oscillation device 12 are connected. As a result, the language stored in the language memory 10 and indicating a sudden approach of the vehicle is transmitted from the speaker 5 via the oscillator 12 at a high frequency, a fast tempo rhythm and a strong sound pressure. After the lapse of the predetermined time, the language switching device 9 connects the second language memory 11 in which a relatively low, weak, and slow language is set to the oscillation device 12, and connects the relatively low frequency and the slow tempo.
The language of the rhythm and the weak sound pressure is transmitted from the speaker 5. Generally, when a sound of a certain frequency, tempo rhythm, or sound pressure is continuously heard, a person tends to be distracted from the sound. However, according to this embodiment, a high frequency and a fast tempo, which means a sudden approach of the vehicle, a language of rhythm and strong sound pressure, and a language of a relatively low frequency, a slow tempo rhythm and a weak sound pressure, By properly using, distractions are suppressed, so that a sudden approach of the vehicle can be continuously and realistically transmitted to a person at the rear or side of the vehicle.

In the fourth embodiment shown in FIG. 4, an alarm sound transmission control device 69 includes a mechanical alarm sound transmission system 691 for transmitting a mechanical alarm sound and a linguistic alarm sound transmission for transmitting a linguistic alarm sound. System 692
Control. The mechanical alarm sound transmission system 691
Is the same as the corresponding part in FIG. 2 in the second embodiment, and the linguistic alarm sound transmission system 692 is
This embodiment is the same as the corresponding portion in FIG. 3 and the same components and components as those in the second and third embodiments have the same names and reference numerals. According to the fourth embodiment, a combination of a mechanical alarm sound and a linguistic alarm sound can be transmitted simultaneously or alternately transmitted, thereby further increasing the variation of the alarm sound transmission pattern. As a result, it becomes possible to make humans recognize a sense of crisis more effectively.

The present invention can be applied not only to the forklift in this embodiment but also to all industrial vehicles including a construction machine or the like equipped with a system for emitting an alarm sound when the vehicle is moving backward.

[0028]

As described above, according to the first to third aspects of the present invention, the vehicle is started backward by combining the timer device constituting the alarm sound generating means and the oscillating device for emitting an alarm sound of a different frequency. Within a certain period of time from the time, an alarm sound of the highest frequency is transmitted via a speaker, and after the predetermined period of time, an alarm sound of a relatively low frequency similar to the conventional one is transmitted, and an alarm sound during reverse driving is transmitted. By changing the frequency of the sound, it is possible to change the auditory change, and usually, a high frequency alarm is generated within a certain period immediately after the reverse running, which is the most frequent collision accident between the vehicle and a person or an object. Hearing can be strongly stimulated by transmitting sound. As a result, the alarm sound can draw attention to a person at the rear or side of the vehicle, the vehicle can be reliably recognized as approaching, and the occurrence of collision accidents between the vehicle and people can be reduced. it can.

According to the fourth aspect of the present invention, the frequency,
The sound pressure switching device can freely switch between the high frequency side alarm sound on the sound pressure storage means side and the low frequency side frequency alarm sound on the sound pressure storage means side, so that a collision accident between the vehicle and a person or an object can be made. It is possible to easily select an alarm sound transmission mode that minimizes the occurrence frequency, and it is possible to more reliably recognize the approach of the vehicle.

According to the fifth aspect of the present invention, by using a high-frequency language indicating a sudden approach of the vehicle and a low-frequency language with a slow tone, the sudden approach of the vehicle can be realized in a realistic manner. Can communicate to humans at the back and sides. Further, according to the invention of claim 6, it is possible to simultaneously transmit a combination of a mechanical alarm sound and a linguistic alarm sound, or alternately transmit the same, thereby further increasing the variation of the alarm sound transmission pattern. This makes it possible for humans to recognize a sense of crisis more effectively.

In short, according to the present invention, it is possible to prevent a collision accident between the vehicle and a person or an object immediately after the start of the reverse movement of the vehicle, and to realize a safe reverse travel.

[Brief description of the drawings]

FIG. 1 is a control block diagram of an alarm sound transmission device in a forklift according to a first embodiment of the present invention.

FIG. 2 is a diagram corresponding to FIG. 1 showing an alarm sound transmission device according to a second embodiment.

FIG. 3 is a diagram corresponding to FIG. 1, illustrating an alarm sound transmission device according to a third embodiment.

FIG. 4 is a diagram corresponding to FIG. 1, showing an alarm sound transmission device according to a fourth embodiment.

FIG. 5 is an alarm sound wave diagram in the first embodiment.

FIG. 6 is an alarm sound wave diagram in the second embodiment.

FIG. 7 is a side view of a forklift to which the present invention is applied.

[Explanation of symbols]

 Reference Signs List 1 forward / backward switching lever 2 timer operation command device 3 timer device 4a, 4b, 4c, 8, 12 oscillator 5 speaker 6 frequency, sound pressure switching device 7a, 7b, 7c frequency, sound pressure memory 9 language switching device 10, 11 Language memory 20 Body 21 Lifting mast 23 Steering handle 69 Alarm sound transmission control device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takahiro Imadegawa 3000, Tana, Sagamihara-shi, Kanagawa Prefecture, Mitsubishi Heavy Industries, Ltd. (72) Inventor Hidetoshi Niriki 3767-5 Sanmuro, Urawa-shi, Saitama SPK Tokyo Engineering Machinery Co., Ltd. 3-11-9 Yamaguchi Denki Kogyo Co., Ltd. F-term (reference) 3F333 AA02 AB13 CA19 FA20 FA36 FE09

Claims (6)

[Claims] 1. An industrial vehicle alarm sound transmission device that generates an alarm sound in accordance with reverse switching of a forward / reverse switching lever during backward movement of a vehicle and transmits the alarm sound via a speaker. For a certain period of time, a high-frequency high-frequency alarm sound is generated and sent to the speaker, and after transmission of the high-frequency alarm sound from the speaker, one or more low-frequency alarm sounds having a lower frequency than the high-frequency alarm sound An alarm sound transmitting device for an industrial vehicle, comprising: an alarm sound generating means for generating an alarm and sending the generated alarm sound to the speaker. 2. A timer device for setting a transmission time of the high-frequency alarm sound and the low-frequency alarm sound from the speaker, and the high-frequency alarm sound and the high-frequency alarm sound during a time set by the timer device. 2. The alarm sound transmission device for an industrial vehicle according to claim 1, further comprising an oscillation device that continuously emits a low frequency alarm sound. 3. The timer device according to claim 2, wherein the timer device transmits the high-frequency alarm sound to the oscillation device for a certain period of time, and then continuously transmits the low-frequency alarm sound. The alarm sound transmission device for an industrial vehicle according to the above. 4. An alarm sound transmission device for an industrial vehicle which generates an alarm sound in accordance with reverse switching of a forward / reverse switching lever when the vehicle travels backward and transmits the alarm sound via a speaker, the frequency of the high frequency alarm sound Are set individually or in combination with sound pressure,
Sound pressure storage means, the high frequency side, the frequency of one or more types of alarm sound having a frequency lower than the set value of the sound pressure storage means, the low frequency side frequency set individually or in combination with sound pressure, Sound pressure storage means, along with the reverse switching of the forward / reverse switching lever, the high frequency side frequency,
An alarm sound transmission for an industrial vehicle, comprising: a sound pressure storage means or a low-frequency side, a frequency for switching a connection between the sound pressure storage means and an oscillation device for transmitting the alarm sound, and a sound pressure switching device. apparatus. 5. An industrial vehicle alarm sound transmission device for generating an alarm sound in accordance with reverse switching of a forward / reverse switching lever during backward traveling of a vehicle and transmitting the alarm sound through a speaker, wherein the alarm sound of the vehicle is used as the alarm sound. A first language storage unit in which a language for notifying reverse traveling is set; a second language storage unit in which a language having a frequency lower than a set value of the first language storage unit is set; An alarm for an industrial vehicle, comprising: a language switching device for switching the connection between the first language storage means or the second language storage means and the oscillation device for emitting the alarm sound when the lever is switched backward. Sound emitting device. 6. An alarm sound transmission device for an industrial vehicle that generates an alarm sound in accordance with reverse switching of a forward / reverse switching lever during backward traveling of a vehicle and transmits the alarm sound via a speaker, as a first alarm sound. A high-frequency side frequency and a sound pressure storage unit in which the frequency of the frequency alarm sound is set individually or in combination with the sound pressure; and one or more types of frequencies lower than the set values of the high-frequency side frequency and the sound pressure storage unit The frequency of the alarm sound is set individually or in combination with the sound pressure on the low frequency side, the sound pressure storage means, and the high frequency side frequency, the sound pressure storage means or the low frequency side together with the reverse switching of the forward / reverse switching lever. A frequency and a sound pressure switching device for switching the connection between the frequency and the sound pressure storage means and the oscillating device for transmitting the alarm sound; A first language storage unit in which a language for notifying the vehicle of backward travel is set, and a second language in which a language having a different warning strength is set from a set value of the first language storage unit. Storage means, and a language switching device for switching the connection between the first language storage means or the second language storage means and the oscillation device that emits the alarm sound together with the reverse switching of the forward / reverse switching lever, An alarm sound transmission device for an industrial vehicle, comprising: an alarm sound transmission control device for simultaneously transmitting and alternately transmitting the combination of the first alarm sound and the second alarm sound.