JPH1037253A - Communication device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deterioration in operating efficiency and noise nuisance to a neighborhood by disposing a radio type transmitter to a construction machine while installing receiving annunciators to each vehicle to be worked on operation. SOLUTION: When a vehicle to be worked on receives various signs from a hydraulic shovel side, a horn utters a sound while the sound is received from a transmitter by conducting the pushing operation of a control switch, and an alarm 21 is sound or a vibrator 22 is vibrated on the vehicle side which receives the sound. Specific code selecting means 16, 18 are mounted on the transmitter and a receiving annunciator 17 respectively, and the specific codes of transmitted and received signals can be selected independently from each other. Information corresponding to various operation forms can be conducted by beforehand selecting each specific code selecting means 16, 18 in conformity with conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a reporting device for construction machines such as hydraulic excavators and bulldozers.

[0002]

2. Description of the Related Art In general, a construction machine such as a hydraulic shovel or the like may be used to load earth and sand into a work vehicle such as a truck. In such a case, it is necessary to notify the working vehicle such as the start and end of the loading work to the driver of the work vehicle, and conventionally, the horn provided on the construction machine is sounded to notify the work vehicle. I was

[0003]

However, in recent years, the working vehicle is often equipped with an air conditioner in the driver's cab, so that the window of the driver's cab tends to be closed. If the noise of the engine noise etc. becomes loud, the sound of the horn may not be heard by the driver of the work vehicle.In such a case, the operator of the excavator may sound the horn many times, In some cases, it is necessary to get off and go to the work vehicle or the like to notify the work efficiency, and not only the work efficiency is lowered but also the surrounding area is damaged, which is not preferable. Therefore, it is conceivable to increase the volume of the horn.However, a loud horn will increase the noise of the work, and if the work site is particularly in the city area or at night, it may cause inconvenience to nearby residents. And there is a problem to be solved by the present invention. Further, when there are a plurality of construction machines and work vehicles, it is necessary for these work vehicles to identify a report from a target construction machine, and improvement of this point is one of the problems to be solved by the present invention. It is.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made to solve these problems. On notifying the work situation to the car, while arranging a wireless transmission device on the construction machine,
Each work vehicle is provided with a reception notification device for notifying a driver of the work vehicle based on signal reception from the transmission device. As a result, the information from the construction machine is notified not only by the sound of the horn but also by radio transmission / reception, and there is no need to increase the volume of the horn. In this, according to the present invention, the transmission output from the transmission device is:
The effective signal reach is set to a weak aerial transmission wave to the work vehicle that is receiving work from the construction machine or is waiting in the vicinity, which requires a special license etc. There is no. Furthermore, in this, the present invention is characterized in that the transmission device is provided with transmission signal selection means capable of selecting and transmitting an arbitrary signal from a plurality of types of preset signals, while the reception notification device is Receiving signal discriminating means for selecting and notifying a signal corresponding to the type of the received signal from a plurality of preset notification modes, whereby the construction of the work vehicle It is possible to identify the transmission from the machine. Further, in this, the present invention is characterized in that the transmission device is provided with transmission signal selection means capable of selecting and transmitting an arbitrary signal from a plurality of types of preset signals, while the reception notification device is The received signal selection means for notifying based on the identification that the received signal is a pre-selected signal is provided, whereby
The work vehicle can receive and notify only the selected signal. Still further, in the present invention, the transmission device is connected to the horn circuit so as to be able to transmit and receive the sound in harmony with the sound of the horn mounted on the construction machine, while the reception notification device is in a receivable state. And a non-reception state. In this case, in the present invention, the notifying means of the reception notifying device may be at least one of light emission, sound generation, and vibration. Further, in this case, in the present invention, the reception notifying device may be provided so as to be portable in a room of the work vehicle.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS. In the drawings, reference numeral 1 denotes a hydraulic excavator. The hydraulic excavator 1 is provided on a crawler-type lower traveling body 2, an upper revolving body 3 that is rotatably provided above the lower traveling body 2, and provided on the upper revolving body 3. Cab 4, a front attachment 5 and the like.
Are members such as a boom 6 whose base end is swingably attached to the upper swing body 3, an arm 7 which is swingably attached to a tip end of the boom 6, and a bucket 8 attached to the tip end of the arm 7. Is the same as before.

[0006] The cab 4 is provided with a control section such as a driver's seat 9, an operation lever 10, and a switch panel 11.
In the present embodiment, a wireless transmission device 1 to be described later
2 are provided. Incidentally, the operation lever 10 is provided with an operation switch 13a for sounding a horn 13 provided at the front of the main body of the upper revolving unit 3, but the transmission device 12 is intermittently connected to the electric circuit of the horn 13. It is connected via a changeover switch 15 for switching. Then, when the operation switch 13a is turned on with the changeover switch 15 closed, the transmission device 12 is set so that the transmission device 12 outputs a signal together with the sound of the horn 13; To call attention to surrounding objects (only pronunciation of horn 13) and horn 1
The sound output of the hydraulic excavator 1 is output together with a signal to notify the work vehicle 14 that receives the work of the hydraulic excavator 1.

On the other hand, as shown in the block circuit diagram of FIG. 3, the transmitting device 12 has a unique code selecting means (corresponding to a transmitting signal selecting means of the present invention) 16 for selecting a unique code signal by a selection switch 16a. A code signal oscillating means 12a for oscillating a unique code signal selected from a plurality of items by the unique code selecting means 16, a high frequency oscillating means 12b for oscillating a high frequency (carrier), and a modulating means 12c for modulating a high frequency with a unique code signal. Thus, the modulated wave is output as a radio signal from the transmitting antenna 12e via the power amplifying means 12d. In the present embodiment, three kinds of unique code signals C1, C2, and C3 are registered in the transmitting device 12 in advance. The transmission output from the transmission device 12 is output as a weak radio wave that does not violate the Radio Law (that is, it is not necessary to obtain or report a license), and the effective signal reach of the signal actually reaches 10 to 15 m (meters). ) Is set to be short enough to reach the work vehicle 14 receiving work from the excavator 1 or the work vehicle 14 waiting on standby to receive work in the vicinity of the excavator 1. Have been.

On the other hand, reference numeral 17 denotes a reception notifying device arranged on the work vehicle 14, and the reception notifying device 17 is provided in FIG.
As shown in the block circuit diagram of FIG.
Antenna 17a for receiving a signal from the antenna, high-frequency amplification means 17b for amplifying the received signal, and detection means 1 for detecting a unique code signal from the amplified high-frequency signal
7c. Further, the reception notifying device 17 is provided with a unique code selecting means (corresponding to the received signal selecting means of the present invention) 18 on the receiving side for selecting which unique code signal among the unique code signals is to be demodulated. However, the unique code selecting means 18 is provided with a selection switch 18a for selecting to demodulate at least one of the three types including zero (not demodulating all the unique code signals). ing. The selected unique code signal is demodulated by the demodulation means 17d, and the selected and demodulated unique code signal is further discriminated by any unique code signal discriminating means (corresponding to the received signal discriminating means of the present invention) 19. Whether it is a code signal is determined, and the determination signal is input to the notification drive unit 20. The drive signal is output from the notification drive unit 20 to the alarm 21 serving as the notification unit and the drive circuit of the vibrator (vibrator) 22. If the determined unique code signal is C1, the alarm 21 is output. The sound of the intermittent sound, the continuous sound of the alarm 21 in the case of C2, and the vibration of the vibrating body 22 in the case of C3 are set. On the side, it is possible to confirm which specific code signal the transmission signal from the transmission device 12 was.

Incidentally, the reception notifying device 17 used in the present embodiment is of a portable type with a built-in battery, and can be carried around because the driver carries it in a breast pocket or the like. Although it has an advantage, it is needless to say that a vehicle mounting type or a vehicle carrying type may be used. Further, the reception notification device 17 is configured to selectively receive all of the unique code signals on the transmission device side from zero and to perform notification corresponding thereto, so that the determination unit 19 is required.
Receive only one preset unique code signal,
That is, if only the unique code signal selected by the unique code selecting means 18 on the receiving side is used, the discriminating means becomes unnecessary. Furthermore, it is also possible to have a configuration in which the unique code selecting means 18 is not provided, and all the unique code signals are broadcast. The same notification may be used without notification, and in this case, a determination unit is not required.

Reference numeral 23 denotes a changeover switch provided in the reception notifying device 16, and the changeover switch 23 is turned on and off.
By switching to the F state, the setting is made so that the signal from the transmitting device 12 is not received. By the way, in the embodiment, the alarm 21 and the vibrating body 22 which are sounding bodies are used as the notifying means, and the notification appealing to the auditory sense and the tactile sense is performed. The notification may be appealing, and various modes such as continuous lighting, blinking lighting, and changing color may be employed. Furthermore, it is also possible to provide a notification mode in which a plurality of these notification means are combined.

In the embodiment of the present invention configured as described above, the soil excavated by the excavator 1 is applied to the work vehicle 1.
4 to be transported to another place.
4 receives various signals from the excavator 1 such as the end of the loading operation. In this case, when the operator of the excavator 1 presses the operation switch 13a, the horn 13 sounds and transmits. The work vehicle 14 that has received the transmission from the device 12
On the side, the alarm 21 sounds or the vibrating body 22 vibrates, so that the driver is informed necessary. Therefore, the information transmission from the excavator 1 to the work vehicle 14 is performed by operating the work vehicle 14 without increasing the volume of the horn 13 unlike the conventional horn 13 alone. A person can check information from the excavator 1 while staying indoors.

Further, in this device, the transmission device 12 and the reception notification device 17 are provided with unique code selecting means 16 and 18, respectively, so that the unique codes of the signals transmitted and received by operating the selection switches 16a and 18a can be freely changed. You can choose. For this reason, by selecting each of the unique code selecting means 16 and 18 according to the conditions, it is possible to perform notification according to various work forms. For example, when the excavator 1 wants to transmit a plurality of information (signals) to the work vehicle 14 at the work site, it is necessary to turn on the selection switches 16a and 18a of the unique code selection means 16 and 18 of both. A number (in this embodiment, up to eight combinations of switches) of the unique code signals is selected so that transmission and reception are possible. For example, the single use of the signals C1, C2, and C3 can be approached, loading starts, and loading, respectively. By deciding on a work signal such as the end, detailed information such as confirmation of the work signal can be provided. On the other hand, the hydraulic excavator 1 sets a plurality of unique code signals so that they can be transmitted individually,
By setting the plurality of work vehicles 14 to be able to receive only one unique code signal selected in advance, the excavator 1 can select the work vehicle 14 to be notified on the hydraulic excavator 1 side. The work vehicle 14 can receive only necessary information.

Conversely, the hydraulic excavator 1 is set so that only a plurality of unique code signals are transmitted for each of the plurality of excavators 1, while the work vehicle 14 is set so that a plurality of unique code signals can be received. In this case, on the work vehicle side, it is possible to identify from which excavator 1 the signal has been transmitted from the type of the notification signal, whereby the work vehicle can move to the work position in proximity to the corresponding excavator 1. it can. On the other hand, when a common unique code signal is selected on the excavator 1 and the work vehicle 14 side, information transmission between the selected excavator 1 and the work vehicle 14 is exclusively performed. Thus, by setting in accordance with various conditions as described above, it is possible to improve the work efficiency.

Further, in this case, since the driver is portable and can be carried by putting it in a breast pocket or the like, it can be used as a call even when the driver is away from the work vehicle 14. In addition, not only the sound but also the vibration of the vibrating body 22 can be notified, so that there is an advantage that more reliable notification can be performed.

The present invention is not limited to the above-described embodiment, but the transmitting and receiving apparatus may be configured to transmit and receive only one kind of unique code signal from the beginning. Further, the transmission from the transmission device does not necessarily have to be performed in coordination with the sounding of the horn, and the transmission can be performed independently, and the transmission device can also be made portable.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a working state of a hydraulic shovel.

FIG. 2 is a perspective view of a cockpit portion of the hydraulic excavator.

FIG. 3 is a block circuit diagram of a transmission device.

FIG. 4 is a block circuit diagram of the reception notification device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 12 Transmitting device 12e Transmission antenna 13 Horn 13a Operation switch 14 Work vehicle 15 Changeover switch 16 Unique code selection means 16a selection switch 17 Reception notification device 17a Reception antenna 18 Unique code selection means 19 Discrimination means 20 Notification drive means 21 alarm 22 vibrator 23 changeover switch

Claims (7)

[Claims] When a construction machine notifies a work vehicle receiving work from the construction machine of a work situation, a radio transmission device is provided in the construction machine, and each work vehicle is provided with a wireless transmission device. A construction machine notification device provided with a reception notification device for notifying a driver of a work vehicle based on signal reception from the transmission device. 2. The transmission output from the transmission device according to claim 1, wherein the effective signal reach distance is set to a weak aerial transmission wave from the construction machine to a work vehicle that is receiving work from the construction machine or is in the vicinity of the work machine. Construction equipment reporting device. 3. The transmission device according to claim 1, wherein the transmission device is provided with transmission signal selection means capable of selecting and transmitting an arbitrary signal from a plurality of types of preset signals. The notifying device is a notifying device for a construction machine provided with a received signal discriminating means for selecting and notifying a signal corresponding to a type of a received signal from a plurality of preset notification modes. 4. The transmission device according to claim 1, wherein the transmission device is provided with transmission signal selection means for selecting and transmitting an arbitrary signal from a plurality of types of preset signals. The receiving notification device is a notification device for a construction machine provided with a reception signal selecting means for notifying based on identification that a received signal is a signal selected in advance. 5. The transmission device according to claim 1, wherein:
A construction machine which is connected to a horn circuit so as to be capable of intermittent switching so that transmission can be performed in connection with the sound of a horn mounted on the construction machine, while the reception notification device is configured to be selectively switchable between a receivable state and a non-reception state. Notification device. 6. The construction machine notification device according to claim 1, wherein the notification unit by the reception notification device is at least one of light emission, sound generation, and vibration. 7. The construction machine notification device according to claim 1, wherein the reception notification device is provided so as to be portable in a room of a work vehicle.