JP2006290487A - Radio control device of work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent misplacing a radio control device without any spacial housing part, easily and at low cost, in a radio control device of a work machine. <P>SOLUTION: The radio control device comprises: a radio controller 10 transmitting an operation signal corresponding to the operation while operating the work machine, and automatically transmitting an identifying signal while not operating the work machine; a radio receiver 20 outputting an activation signal activating a work device based on the received operation signal when receiving the operation signal from the radio controller 10, and monitoring the identifying signal to output an alarm signal activating an alarm means 30 if the radio receiver has not received a predetermined identifying signal, when the radio receiver does not receive the operation signal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless control device for a work machine for remotely operating a work machine such as a vehicle-mounted crane.

2. Description of the Related Art In recent years, in work machines such as vehicle-mounted cranes, those in which a work device mounted on a vehicle is remotely operated by a wireless control device have become mainstream, which contributes to improvement of work efficiency.
In such a wireless control device for a work machine, a wireless controller is used for an operator to operate the work device from a position away from the work device. For example, in a radio control device for a vehicle-mounted crane, a radio controller as shown in FIG. 3 is used.

The wireless operation device 100 is provided with selection switches 11, 12, 13, and 14 corresponding to the operation of each actuator of the crane as a work device on the front, and the back surface of the grip 15 is for controlling the operation speed of the actuator. A speed lever 16 is provided.
When performing the remote operation, the operator holds the grip 15 of the wireless controller 100 and selects and operates each selection switch corresponding to the operation of each actuator of the crane, and controls a speed lever for controlling the operation speed of the actuator. 16 is operated. When an operation is performed, an operation signal corresponding to the operation is transmitted and received by a wireless receiver installed on the crane side, and the crane actuator is operated based on the operation signal.

However, such a wireless controller is designed to be easily carried, so it can be taken out to the work site during work, and the vehicle can be left somewhere after the work is completed and the vehicle can be moved to another work site. There was a problem of moving and losing the wireless controller.
As a means for preventing such loss of the wireless controller, a wireless controller housing portion is provided at an appropriate place such as a driver's cab, and a vehicle equipped with a work implement is moved and moved without housing the wireless controller in this housing portion. In this case, a misplacement prevention device has been proposed in which an alarm is activated to notify an operator of misplacement (see Patent Document 1).

However, such a misplacement prevention device requires a space for providing a dedicated accommodating portion in the cab or the like, and the operator must always accommodate the wireless controller in the accommodating portion when the work is completed. There is. In addition, the housing portion needs to be configured with a highly reliable detection switch that does not malfunction, and the apparatus becomes expensive.
Japanese Utility Model Publication No. 7-16705

  The present invention solves the above-described problem in the radio control device of a work machine, and does not require a dedicated housing or the like, and can easily and inexpensively prevent misplacement of a radio controller. An object of the present invention is to provide a wireless control device for a aircraft.

  The wireless operating device for a work machine according to the present invention transmits an operation signal corresponding to an operation during operation, and automatically transmits an identification signal during non-operation, and receives an operation signal from the wireless operation device. When the operation signal is received, an operation signal for operating the work device is output. When the operation signal is not received, the identification signal is monitored, and if the predetermined identification signal is not received, an alarm is issued. The above-described problem is solved by providing a wireless receiver that outputs an alarm signal for operating the means.

In the wireless operating device of this work machine, when the operator performs an operation with the wireless operation device, an operation signal corresponding to the operation is transmitted from the wireless operation device, but when the operation of the wireless operation device is stopped, the wireless operation device An identification signal is automatically transmitted.
When the wireless receiver receives the operation signal transmitted from the wireless controller, the wireless receiver outputs an operation signal for operating the work device based on the received operation signal, so that the work device operates. When the operation signal is not received, the identification signal is monitored, and if the predetermined identification signal is not received, an alarm signal for operating the alarm means is output.

If the alarm means is activated by this alarm signal, the operator can recognize that the wireless controller is outside the identification range. Therefore, when the vehicle on which the work implement is mounted is moved and moved after the work is completed, the operator can securely store the vehicle in a storage place such as a cab of the work implement without leaving it in a place where the wireless controller is used. .
In addition, if the travel detection means that enables the alarm means to be activated by detecting the travel of the vehicle equipped with the work implement is provided, the alarm means is activated only during the travel of the vehicle equipped with the work implement, and temporarily during the work. When the operation of the wireless controller is interrupted, the alarm means does not operate. Thereby, it is possible to prevent the operator from feeling noisy when the alarm means is activated each time the operation of the wireless controller is temporarily interrupted.

  According to the wireless operating device for a working machine of the present invention, it is not necessary to provide a dedicated accommodating portion or the like, and it is possible to easily and inexpensively prevent the wireless operating device from being left behind.

FIG. 1 is a side view of a vehicle-mounted crane provided with a radio control device according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of the radio control device of a work machine.
A vehicle-mounted crane 1 that is a working machine has a crane 6 mounted as a working device on a chassis frame 5 between a loading platform 3 and a cab 4 of the vehicle 2.
In the crane 6, a column 63 is pivotably provided on a base 62 having an outrigger 61, and a boom 64 that expands and contracts is pivotally supported at an upper end portion of the column 63. The column 6 is provided with a winch (not shown). A wire rope of the winch is guided to the tip of the boom 64 and the hook is suspended from the tip of the boom 64.

The crane 6 includes an actuator for turning the column 63 (boom 64), raising and lowering and extending and retracting the boom 64, and hoisting and unwinding of a hook by a winch. It operates by supplying pressure oil through a control valve device (not shown).
The radio control device of the crane 6 includes a radio controller 10 and a radio receiver 20.

The wireless controller 10 is the same as the conventional wireless controller 100 shown in FIG. 3 in the basic configuration, and will be described with reference to FIG. The radio operating device 10 is provided with selection switches 11, 12, 13, and 14 corresponding to the operation of each actuator of the crane 6 on the front, and a speed lever 16 for controlling the operation speed of the actuator on the back of the grip 15. Is provided.
When performing remote operation, the operator grasps the grip 15 of the wireless controller 10 and selects and operates each selection switch corresponding to the operation of each actuator of the crane 6 while controlling the operation speed of the actuator. The lever 16 is operated. When an operation is performed, an operation signal corresponding to the operation is transmitted.

In the wireless controller 10, an identification signal is automatically transmitted during non-operation. This identification signal is a signal for identifying each wireless controller 10. The transmission output when transmitting the identification signal is weak, and the transmission cycle is not continuous transmission, but intermittent transmission is performed once every 10 seconds.
The radio receiver 20 includes a receiving antenna 21 and is installed at the front end of the loading platform 3 near the column 63 of the crane 6. The radio receiver 20 receives the operation signal transmitted from the radio operator 10, outputs an operation signal for operating the crane 6 to the switching control valve device based on the received operation signal, and operates the actuator of the crane 6. It is like that.

The wireless receiver 20 is provided with a misplacement prevention output terminal 22, and an alarm unit 30 and a travel detection unit 31 are connected in series from the misplacement prevention output terminal 22.
The power input terminal 23 of the wireless receiver 20 is connected to the battery power source 33 of the vehicle 2 via the engine key switch 32.
The alarm means 30 is installed in the cab 4 using a buzzer or a lamp. As the travel detection means 31, a shift from the neutral of the transmission of the vehicle 2 is detected, the release of the parking brake is detected, or the power take-off disconnection state capable of connecting and disconnecting the hydraulic power source of the crane 6 is detected. Various means can be used.

Since the transmission power of the identification signal from the wireless controller 10 is weak, the reachable distance of the identification signal to the wireless receiver 20 is in the range of several meters. For example, the identification signal receivable area A shown in FIG. It cannot be received with anything other than.
Since the identification signal receivable area A is actually affected by the directivity of the receiving antenna 21 of the wireless receiver 20 and the environment of the mounting position, for example, the operator's cab 4 in which the wireless operator 10 is normally stored is identified. The transmission output of the identification signal from the wireless controller 10 or the reception sensitivity of the identification signal of the wireless receiver 20 is adjusted and set so as to enter the signal receivable area A.

When the wireless receiver 20 receives the operation signal transmitted from the wireless controller 10, the wireless receiver 20 outputs an operation signal based on the received operation signal, and operates the actuator of the crane 6 corresponding to the operation.
When the operation signal is not received, the identification signal is monitored, and if the predetermined identification signal is not received, the misplacement prevention output is turned on. At this time, if the travel detection means 31 is on, the alarm means 30 issues a misplacement prevention alarm.
Table 1 shows the alarm state of the alarm unit 30 with respect to whether or not the identification signal is received by the wireless receiver 20 when no operation signal is received and whether or not the detection is performed by the travel detection unit 31.

Note that when the engine of the vehicle 4 is turned off, neither traveling nor crane work is performed, and there is no need to issue a misplacement prevention alarm, so the radio receiver 20 connects the power input terminal 23 to the vehicle via the engine key switch 32. When the engine is off, power is not supplied to the wireless receiver 20 to prevent the battery power source 33 from being consumed.
In the vehicle-mounted crane 1, when the crane operation by the operation of the wireless operation device 10 is completed and the vehicle-mounted crane 1 travels to another work site, the operator stores the wireless operation device 10 in the cab 4. To do. At this time, as long as it is in the cab 4, it is not necessary to limit the storage location, and it can be stored anywhere. If it is stored in the cab 4, it can travel and travel without generating a misplacement prevention alarm.

  If the radio operating device 10 is misplaced so that the radio receiver 20 cannot receive the identification signal, the alarm means 30 will prevent misplacement when the vehicle 2 is driven. An alarm is generated to notify the operator. Further, even if the wireless controller 10 is left in a location in the immediate vicinity of the vehicle-mounted crane 1 where the wireless receiver 20 can receive the identification signal, if the vehicle 2 is run, the wireless operation device 10 is separated so that the identification signal cannot be received. When the vehicle travels to the position, an alarm device 30 generates a misplacement prevention alarm and can notify the operator.

In this wireless control device of the vehicle-mounted crane 1, the identification signal is monitored by the wireless receiver 20, and whether or not the identification signal is received is used as a judgment condition for generating an alarm. However, the reception level of the identification signal is not less than a predetermined value. It can also be used as a judgment condition for generating an alarm.
The transmission period of the identification signal is also transmitted once every 10 seconds. However, the identification signal may be changed as appropriate in consideration of battery consumption of the wireless controller 10.

In addition to preventing the radio operator 10 from being left behind, this radio control device for a vehicle-mounted crane can also notify the operator of the battery life of the radio operator 10. That is, when the battery of the wireless operation device 10 is exhausted and the identification signal cannot be transmitted, the wireless receiver 20 cannot receive the identification signal, so that an alarm is generated in the same manner as when the wireless operation device 10 is left behind. At this time, if it can be visually confirmed that the wireless controller 10 is housed in the cab 4, the operator can determine that the battery of the wireless controller 10 is exhausted.
Therefore, if such a state occurs on the way to the work site, preparation for battery replacement can be made before the start of work, which can contribute to improvement of work efficiency.

1 is a side view of a vehicle-mounted crane provided with a radio control device according to an embodiment of the present invention. It is a block diagram of the radio control apparatus of a vehicle-mounted crane. It is a perspective view of a radio operating device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle-mounted crane 2 Vehicle 3 Car bed 4 Driver's cab 5 Chassis frame 6 Crane 10 Radio operator 20 Radio receiver 30 Alarm means 31 Travel detection means A Identification signal receivable area

Claims (2)

  When an operation signal corresponding to the operation is transmitted during operation and an identification signal is automatically transmitted during non-operation, and when an operation signal is received from the wireless operation device, the received operation signal Based on this, an operation signal for operating the work device is output, and when the operation signal is not received, the identification signal is monitored. And a wireless operating device for a work machine. 2. The wireless operating device for a working machine according to claim 1, further comprising traveling detecting means that enables an alarm means to be activated by detecting traveling of a vehicle equipped with the working machine.

Images