JP7167464B2 - Remote control terminal and work vehicle equipped with remote control terminal - Google Patents

Description

TECHNICAL FIELD The present invention relates to a remote control terminal and a work vehicle equipped with the remote control terminal.

2. Description of the Related Art Conventionally, in work vehicles equipped with work equipment such as mobile cranes and aerial work vehicles, a work vehicle in which an actuator of the work equipment is remotely controlled and a remote control terminal for operating the actuator of the work equipment have been proposed. In the work using the remote control terminal, the operator can perform remote control while confirming the moving state of the suspended load in the vicinity of the suspended load or at the movement target position of the suspended load away from the operating device of the work device.

In such a work vehicle, the relative positional relationship between the work device and the remote control terminal changes according to work conditions. For this reason, a worker who operates a work device using a remote control terminal needs to always consider the relative positional relationship with the work device when operating the operation tool of the remote control terminal. Therefore, regardless of the relative positional relationship between the work device and the remote control terminal, the operating direction of the operation tool of the remote control terminal and the operating direction of the work device are matched to facilitate and simply operate the work device. A remote control terminal capable of For example, it is as in Patent Document 1.

A remote control device (remote control terminal) described in Patent Document 1 is provided with a signal transmission unit that transmits a reference signal, such as a laser beam with high straightness, as a reference signal. Further, a control device on the crane (working device) side is provided with a reference signal receiving section. The remote control device is configured such that the reference coordinate system of the operation tool and the transmission direction of the reference signal match. The control device on the crane side of the working machine identifies the direction of the remote control device by receiving the reference signal from the remote control device at the receiving unit, and matches the coordinate system of the crane with the coordinate system of the remote control device. As a result, since the operating direction of the operating tool of the remote control device and the operating direction of the crane match, regardless of the relative positional relationship between the crane and the remote control device, the crane can be easily operated by the remote control device. can be done.

However, in the mobile crane described in Patent Document 1, the reference signal is received by the receiving unit so that the reference coordinate system of the operating tool and the coordinate system of the working machine are matched. The reference coordinate system and the coordinate system of the work machine are made to coincide only when the signal transmitting section of the remote control terminal is almost facing the receiving section so that the reference signal composed of laser light or the like with high straightness can be received. It was disadvantageous in that it was impossible to

JP 2010-228905 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide a remote control terminal and a work vehicle equipped with a remote control terminal that can prevent erroneous operations during remote control of a work device and can easily and simply remotely control the work device.

The problems to be solved by the present invention are as described above, and the means for solving the problems will now be described.

That is, a first invention is a work vehicle equipped with a remotely operated work device, wherein a first operation unit for remotely operating the work device based on an operation direction reference and a control device of the work device communicate with each other. and a remote control terminal having a control unit for controlling the operation of the remote control terminal, wherein the remote control terminal includes a radio wave transmitter for calculating the direction of the remote control terminal with respect to the work device. wherein the working device is provided with information acquiring means for receiving the radio wave from the radio wave transmitter, and when the control device of the working device receives the radio wave from the radio wave transmitter by the information acquiring means, When the direction of the remote control terminal with respect to the work device is calculated based on the radio waves obtained from the radio waves obtained from the operation, and the signal of the operation unit is acquired, the direction of the remote control terminal with respect to the work device calculated and the tilt of the operation unit with respect to the operation direction reference A direction in which the working device operates is calculated based on the angle, the working device is operated in that direction, and the remote control terminal causes the working device to receive radio waves from the radio wave transmitter. 2 operating sections are provided .

A second aspect of the invention is a work vehicle in which at least two of the radio wave transmitters are arranged at a predetermined interval in the operation terminal.

A third aspect of the invention is a remote control terminal for a work device provided in a work vehicle, comprising a radio wave transmitter for calculating a direction of the remote control terminal with respect to the work device, and an operation direction reference of the remote control terminal. a first operation unit for remotely operating the work device based on the above; a second operation unit for causing the work device to receive radio waves from the radio wave transmitter; and a control device for the work device. and a control unit for controlling the operation of the remote control terminal, and when the first operation unit is operated, the work device is operated based on the tilt angle of the first operation unit with respect to the operation direction reference. a signal to the control device of the work device, and when the second operation unit is operated, a radio wave for calculating the direction of the remote control terminal with respect to the work device is transmitted to the control device of the work device. is.

ADVANTAGE OF THE INVENTION This invention has an effect as shown below.

In the first and third inventions , the direction of the remote control terminal with respect to the working device is calculated by the radio wave transmitter provided on the remote control terminal. A control signal that takes into consideration the direction of the remote control terminal with respect to the work device causes the work device to move in that operation direction. Therefore, the operator does not lose recognition of the operating direction of the crane with respect to the operating direction of the operating unit during remote control. As a result, it is possible to prevent erroneous operations during remote control of the work device, and to easily and simply perform remote control of the work device. Further, when the direction of the remote control terminal with respect to the working device is changed, the direction of the remote control terminal is recalculated at the discretion of the operator. As a result, it is possible to prevent erroneous operations during remote control of the work device, and to easily and simply perform remote control of the work device.

In the second invention, since the remote control terminal is provided with at least two radio wave transmitters, the direction of the remote control terminal can be easily calculated from the positional relationship of each radio wave transmitter with respect to the working device. As a result, it is possible to prevent erroneous operations during remote control of the work device, and to easily and simply perform remote control of the work device.

The side view which shows the whole structure of a crane. FIG. 2 is a block diagram showing the control configuration of the crane; 1 is a plan view showing a schematic configuration according to an embodiment of a remote control terminal; FIG. FIG. 2 is a block diagram showing a control configuration according to one embodiment of a remote control terminal; FIG. 4 is a schematic diagram showing the positional relationship between the crane device and the remote control terminal when the direction of the remote control terminal is detected; FIG. 4 is a schematic diagram showing an image of a package displayed on the remote control terminal; FIG. 4 is a schematic diagram showing the operation mode of the crane device when the first operation tool of the remote control terminal in any direction is operated upward; FIG. 4 is a schematic diagram showing an operation mode of the crane device when the first operation tool of the remote control terminal in an arbitrary direction is operated to an arbitrary tilting angle;

A crane 1 that is a mobile crane (rough terrain crane) that is a work vehicle according to a first embodiment of the present invention will be described below with reference to FIGS. 1 and 2 . In this embodiment, a rough terrain crane will be described, but an all-terrain crane, a truck crane, a loading truck crane, an aerial work vehicle, or the like may also be used.

As shown in FIG. 1, a crane 1 is a mobile crane that can be moved to an unspecified location. The crane 1 has a vehicle 2, a crane device 6 that is a working device, and a remote control terminal 32 (see FIG. 2) capable of remotely controlling the crane device 6. As shown in FIG.

The vehicle 2 transports the crane device 6 . A vehicle 2 has a plurality of wheels 3 and runs using an engine 4 as a power source. The vehicle 2 is provided with outriggers 5 . The outriggers 5 are composed of overhang beams that can be hydraulically extended on both sides in the width direction of the vehicle 2 and hydraulic jack cylinders that can be extended in a direction perpendicular to the ground. The vehicle 2 can extend the workable range of the crane 1 by extending the outriggers 5 in the width direction of the vehicle 2 and grounding the jack cylinders.

The crane device 6 lifts the load W with a wire rope. The crane device 6 includes a swivel base 7, a boom 9, a jib 9a, a main hook block 10, a sub-hook block 11, a hoisting hydraulic cylinder 12, a main winch 13, a main wire rope 14, a sub winch 15, a sub wire rope 16, and a cabin. 17, a radio wave detector 30, a control device 31, and the like.

The swivel base 7 is configured to allow the crane device 6 to swivel. The swivel base 7 is provided on the frame of the vehicle 2 via an annular bearing. The swivel base 7 is rotatable around the center of an annular bearing. The swivel base 7 is provided with a hydraulic swiveling hydraulic motor 8 as an actuator. The swivel base 7 is configured to be swivelable in one direction and the other direction by a swiveling hydraulic motor 8 .

A turning hydraulic motor 8, which is an actuator, is rotated by a turning valve 23 (see FIG. 2), which is an electromagnetic proportional switching valve. The turning valve 23 can control the flow rate of hydraulic oil supplied to the turning hydraulic motor 8 to an arbitrary flow rate. That is, the swivel base 7 is configured to be controllable to an arbitrary swivel speed via the swivel hydraulic motor 8 rotated by the swivel valve 23 . The swivel base 7 is provided with a swivel sensor 27 (see FIG. 2) for detecting the swivel position (angle) and swivel speed of the swivel base 7 .

The boom 9 supports the wire rope so that the load W can be lifted. The boom 9 is composed of a plurality of boom members. The base end of the base boom member of the boom 9 is swingably provided substantially at the center of the swivel base 7 . The boom 9 is configured to be telescopic in the axial direction by moving each boom member by a telescopic hydraulic cylinder (not shown), which is an actuator. Moreover, the boom 9 is provided with a jib 9a. The jib 9 a is held in a posture along the base boom member by a jib support portion provided on the base boom member of the boom 9 . The base end of the jib 9a is configured to be connectable to the jib support portion of the top boom member.

An expansion/contraction hydraulic cylinder (not shown), which is an actuator, is operated to expand/contract by an expansion/contraction valve 24 (see FIG. 2), which is an electromagnetic proportional switching valve. The expansion/contraction valve 24 can control the flow rate of hydraulic oil supplied to the expansion/contraction hydraulic cylinder to an arbitrary flow rate. The boom 9 is provided with an extension sensor 28 for detecting the length of the boom 9 .

The camera 9b, which is an image acquiring means, acquires an image i of the package W and features around the package W. FIG. A camera 9 b is provided at the tip of the boom 9 . The camera 9b is configured to be capable of photographing features and landforms around the load W and the crane 1 from vertically above the load W. In addition, the camera 9b is configured to be rotatable by 360 degrees, and can photograph all directions centering on the tip of the boom 9. As shown in FIG.

A main hook block 10 and a sub hook block 11 are for hanging a load W. The main hook block 10 is provided with a plurality of hook sheaves around which the main wire rope 14 is wound, and a main hook 10a for hanging the load W. The sub-hook block 11 is provided with a sub-hook 11a for hanging the load W.

The hydraulic cylinder 12 for raising and lowering, which is an actuator, raises and lowers the boom 9 and holds the posture of the boom 9 . The hoisting hydraulic cylinder 12 has an end of the cylinder portion swingably connected to the swivel base 7 and an end of the rod portion swingably connected to the base boom member of the boom 9 . The hoisting hydraulic cylinder 12 is expanded and contracted by a hoisting valve 25 (see FIG. 2), which is an electromagnetic proportional switching valve. The hoisting valve 25 can control the flow rate of hydraulic oil supplied to the hoisting hydraulic cylinder 12 to an arbitrary flow rate. The boom 9 is provided with a hoisting sensor 29 (see FIG. 2) for detecting the hoisting angle of the boom 9, a weight sensor for detecting the weight of the load W, and the like.

The main winch 13 and the sub winch 15 carry in (wind up) and let out (lower) the main wire rope 14 and the sub wire rope 16 . The main winch 13 is rotated by a main hydraulic motor (not shown) whose actuator is a main drum around which the main wire rope 14 is wound. It is configured to be rotated by a hydraulic motor.

The main hydraulic motor is rotationally operated by a main valve 26m (see FIG. 2), which is an electromagnetic proportional switching valve. The main winch 13 controls a main hydraulic motor by a main valve 26m, and is configured to be operable at arbitrary feeding and feeding speeds. Similarly, the sub winch 15 controls the sub hydraulic motor by means of a sub valve 26s (see FIG. 2), which is an electromagnetic proportional switching valve, so that it can be operated at an arbitrary feeding and feeding speed.

The cabin 17 covers the cockpit. The cabin 17 is mounted on the swivel base 7 . A cockpit (not shown) is provided. In the driver's seat, an operating tool for operating the vehicle 2, a turning operating tool 18 for operating the crane device 6, a hoisting operating tool 19, a telescopic operating tool 20, a main drum operating tool 21m, a sub drum operating tool 21s, etc. is provided (see FIG. 2). The turning operation tool 18 can operate the turning hydraulic motor 8 . The hoisting operation tool 19 can operate the hoisting hydraulic cylinder 12 . The telescopic operation tool 20 can operate a telescopic hydraulic cylinder. The main drum operating tool 21m can operate a main hydraulic motor. The sub drum operating tool 21s can operate a sub hydraulic motor.

The communication device 22 (see FIG. 2) receives control signals from the remote control terminal 32 and transmits control information and the like from the crane device 6 . A communication device 22 is provided in the cabin 17 . The communication device 22 is configured to transfer a control signal or the like from the remote control terminal 32 to the control device 31 via a communication line (not shown). The communication device 22 is also configured to transfer control information from the control device 31 and the image i from the camera 9 b to the remote control terminal 32 .

The radio wave detector 30, which is information acquisition means, can receive direction calculation radio waves of a predetermined frequency in all directions, and acquire the transmission time and the reception time of the direction calculation radio waves. A radio wave detector 30 is provided at the tip of the boom 9 .

As shown in FIG. 2, the control device 31 controls actuators of the crane device 6 through respective valves. The control device 31 is provided inside the cabin 17 . The control device 31 may have a configuration in which a CPU, a ROM, a RAM, an HDD, and the like are connected via a bus, or may have a configuration including a one-chip LSI or the like. The controller 31 stores various programs and data for controlling the operations of actuators, switching valves, sensors, and the like.

The control device 31 is connected to the camera 9b, the turning operation tool 18, the raising and lowering operation tool 19, the telescopic operation tool 20, the main drum operation tool 21m and the sub drum operation tool 21s, and is used to obtain the image i of the camera 9b and the direction calculation image i(d). ), and the operation amount of each of the turning operation tool 18, the hoisting operation tool 19, the main drum operation tool 21m, and the sub-drum operation tool 21s can be obtained.

The control device 31 is connected to the communication device 22, acquires a control signal from the remote control terminal 32, and calculates from the control information from the crane device 6, the image i from the camera 9b, the reception intensity of the direction calculation radio wave, etc. The rotation angle θ1 and the like of the remote control terminal 32 can be transmitted.

The control device 31 is connected to the swing valve 23, the expansion/contraction valve 24, the hoisting valve 25, the main valve 26m and the sub valve 26s, and controls the swing valve 23, the hoisting valve 25, the main valve 26m and the sub valve 26m. A control signal can be transmitted to the valve 26s.

The control device 31 is connected to the turning sensor 27, the telescopic sensor 28, and the hoisting sensor 29, and can acquire the turning position of the swivel base 7, boom length, hoisting angle, and weight of the load W.

The control device 31 is connected to the radio wave detector, and controls the remote control terminal for the tip of the boom 9 based on the intensity distribution in all directions and the synchronization signal of the direction calculation radio waves of at least two or more different frequencies received by the radio wave detector. 32 orientations can be calculated.

The control device 31 can generate a control signal corresponding to each operating tool based on the amount of operation of the turning operating tool 18, the raising and lowering operating tool 19, the main drum operating tool 21m and the sub drum operating tool 21s.

The crane 1 configured in this way can move the crane device 6 to an arbitrary position by running the vehicle 2 . In addition, the crane 1 raises the boom 9 at an arbitrary hoisting angle with the hoisting hydraulic cylinder 12 by operating the hoisting operation tool 19, and extends the boom 9 to an arbitrary boom 9 length by operating the telescopic operation tool 20. By doing so, the lifting height and working radius of the crane device 6 can be increased. In addition, the crane 1 can transport the load W by lifting the load W with the sub-drum operation tool 21 s and the like and rotating the swivel base 7 by operating the swivel operation tool 18 .

Next, the remote control terminal 32 will be described with reference to FIGS. 3 to 5. FIG.
As shown in FIG. 3 , the remote control terminal 32 is used when remotely controlling the crane device 6 . The remote control terminal 32 includes a housing 33, a suspended load moving operation tool 35 which is a first operation unit provided on the operation surface of the housing 33, a direction calculation operation tool 34 which is a second operation unit, and a terminal side turning operation. terminal-side telescopic operation tool 37, terminal-side main drum operation tool 38m, terminal-side sub-drum operation tool 38s, terminal-side raising/lowering operation tool 39, one-side radio wave transmitter 40a, other-side radio wave transmitter 40b, terminal-side display device 41, a terminal-side communication device 42, a terminal-side control device 43 (see FIG. 4), and the like. The remote control terminal 32 sends a control signal of the valve of each actuator for moving the load W by operating the load moving operation tool 35 or various operation tools based on the operation direction reference Bo (see FIG. 5) to the crane device 6. Send to

The operation direction reference Bo of the remote control terminal 32 is a reference for setting the moving direction of the load W moved by tilting the suspended load moving operation tool 35 in an arbitrary direction. Specifically, in the present embodiment, the operation direction reference Bo is the upward direction toward the operation surface of the housing 33 of the remote control terminal 32 (hereinafter simply referred to as the "upward direction of the remote control terminal 32") as an initial setting. ) (see dashed arrow). The operation direction reference Bo is used to calculate the movement direction of the load W moved by the crane device 6 of the crane 1 (the operation direction of the tip of the boom 9), so that when the suspended load moving operation tool 35 is tilted in an arbitrary direction. This is a reference for calculating the tilt angle θ2 of .

The housing 33 is a main component of the remote control terminal 32 . The housing 33 is sized to be held by the operator's hand. The housing 33 has a direction calculating operation tool 34, a suspended load moving operation tool 35, a terminal side turning operation tool 36, a terminal side expansion/contraction operation tool 37, a terminal side main drum operation tool 38m, and a terminal side sub drum operation tool 38s on the operation surface. , a terminal side hoisting operation tool 39, one side radio wave transmitter 40a, the other side radio wave transmitter 40b, a terminal side display device 41 and a terminal side communication device 42 (see FIGS. 2 and 4).

The direction calculation operation tool 34 receives an instruction to calculate the direction of the remote control terminal 32 with respect to the tip of the boom 9 . The direction calculation operation tool 34 is composed of a button or the like that protrudes from the operation surface of the housing 33 . The remote control terminal 32 causes the terminal-side control device 43 to transmit direction-calculating radio waves to the one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b when the direction calculation operation tool 34 is pressed. is configured to Further, the remote control terminal 32 is configured to transmit an operation signal of the direction calculation operation tool 34 to the control device 31 of the crane device 6 via the terminal side communication device 42 .

An instruction to move the load W in any direction and at any speed on any horizontal plane is input to the suspended load moving operation tool 35, which is the first operation unit. The suspended load moving operation tool 35 is composed of an operation stick that stands substantially vertically from the operation surface of the housing 33 and a sensor (not shown) that detects the tilting direction and tilting amount of the operation stick. The suspended load moving operation tool 35 is configured such that the operation stick can be tilted in any direction. The suspended load moving operation tool 35 transmits a tilting angle θ2 (see FIG. 8) from the operation direction reference Bo to the tilting direction of the operation stick detected by the sensor and a signal about the tilting amount to the terminal-side control device 43. is configured as The suspended load moving operation tool 35 has an arrow Aa pointing upward toward the operation surface of the housing 33, an arrow Ab pointing rightward toward the operation surface, an arrow Ac pointing downward toward the operation surface, and an arrow Ab pointing rightward toward the operation surface. An arrow Ad indicating the left direction toward the surface is displayed as a guideline for the tilting angle θ2 of the suspended load moving operation tool 35 .

The terminal-side turning operation tool 36 receives an instruction to turn the crane device 6 in an arbitrary moving direction at an arbitrary moving speed. The terminal-side turning operation tool 36 is composed of, for example, an operation stick that stands substantially vertically from the operation surface of the housing 33 and a sensor (not shown) that detects the tilting direction and tilting amount of the operation stick. The terminal-side turning operation tool 36 is configured to be tiltable in a direction for instructing a left turn and a direction for instructing a right turn.

The terminal-side telescoping operation tool 37 receives an instruction for telescoping the boom 9 at an arbitrary speed. The terminal-side telescopic operation tool 37 is composed of, for example, an operation stick erected from the operation surface of the housing 33 and a sensor (not shown) that detects the tilting direction and tilting amount of the stick. The terminal-side expansion/contraction operation tool 37 is configured to be tiltable in a direction for instructing extension and a direction for instructing contraction.

The terminal-side main drum operating tool 38m receives an instruction to rotate the main winch 13 at an arbitrary speed in an arbitrary direction. The terminal-side main drum operation tool 38m is composed of, for example, an operation stick erected from the operation surface of the housing 33 and a sensor (not shown) for detecting the tilting direction and the tilting amount thereof. The terminal-side main drum operating tool 38m is configured to be tiltable in a direction for instructing winding up and a direction for instructing winding down of the main wire rope 14, respectively. The terminal-side sub-drum operating tool 38s is also configured in the same manner.

The terminal-side raising and lowering operation tool 39 receives an instruction to raise and lower the boom 9 at an arbitrary speed. The terminal-side raising and lowering operation tool 39 is composed of, for example, an operation stick erected from the operation surface of the housing 33 and a sensor (not shown) for detecting the tilting direction and the tilting amount thereof. The terminal-side raising and lowering operation tool 39 is configured to be tiltable in the direction of instructing to stand up and in the direction of instructing to lie down.

The radio wave transmitter 40a on one side and the radio wave transmitter 40b on the other side serve as a reference for calculating the direction of the remote control terminal 32 with respect to the direction in which the boom 9 extends. In this embodiment, the one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b are configured to transmit direction-calculating radio waves of different frequencies. The one-side radio wave transmitter 40a is provided at the left end portion of the housing 33 facing the operating surface, and the other side radio wave transmitter 40b is provided at the right end portion of the housing 33 facing the operating surface. The one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b are arranged at a predetermined interval P. As shown in FIG. The one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b are configured to transmit and stop direction calculation radio waves in response to a control signal from the terminal-side control device 43. FIG. The one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b synchronize the time of transmitting the direction calculation radio wave, and simultaneously transmit the direction calculation radio wave and the synchronization signal having different frequencies to the crane 1 . The remote control terminal 32 transmits direction calculation radio waves and synchronization signals to the radio wave detector 30 from the one side radio wave transmitter 40 a and the other side radio wave transmitter 40 b by operating the direction calculation operation tool 34 .

The terminal-side display device 41 displays various information such as posture information of the crane 1 and information of the load W. FIG. The terminal-side display device 41 is composed of an image display device such as a liquid crystal screen. The terminal-side display device 41 is provided on the operation surface of the housing 33 . The terminal-side display device 41 displays an image i of the load W photographed from the boom 9 and its surrounding features. Furthermore, an arrow G indicating the extending direction of the boom 9 is superimposed on the image i on the terminal-side display device 41 . In addition, the image i of the load W and its surrounding features displayed on the terminal-side display device 41 is rotated and displayed according to the calculated direction of the remote control terminal 32 . That is, the terminal-side display device 41 displays the image i in a state in which the rotation direction and the rotation angle θ1 of the operation direction reference Bo (see the dashed arrow in FIG. 5) with respect to the extending direction of the boom 9 are reflected.

Further, on the terminal-side display device 41, an arrow Aa indicating an upward direction toward the operation surface of the housing 33, an arrow Ab indicating a right direction toward the operation surface, an arrow Ac indicating a downward direction toward the operation surface, An arrow Ad indicating the left direction toward the operation surface is displayed as a guide for the tilting angle θ2 (see FIG. 8) of the suspended load moving operation tool 35 .

As shown in FIG. 4 , the terminal-side communication device 42 receives control information and the like of the crane device 6 and transmits control information and the like from the remote control terminal 32 . The terminal-side communication device 42 is provided inside the housing 33 . The terminal-side communication device 42 is configured to transmit the image i, the control signal, and the like from the crane device 6 to the terminal-side control device 43 . Also, the terminal-side communication device 42 is configured to transmit control information from the terminal-side control device 43 to the crane device 6 via the communication device 22 of the crane 1 .

A terminal-side control device 43 as a control unit controls the remote control terminal 32 . The terminal-side control device 43 is provided inside the housing 33 of the remote control terminal 32 . The terminal-side control device 43 may have a structure in which a CPU, a ROM, a RAM, an HDD, etc. are connected via a bus, or may have a structure consisting of a one-chip LSI or the like. The terminal-side control device 43 includes a direction calculation operating tool 34, a suspended load moving operating tool 35, a terminal-side turning operating tool 36, a terminal-side telescopic operating tool 37, a terminal-side main drum operating tool 38m, a terminal-side sub-drum operating tool 38s, and a terminal-side operating tool 38s. Various programs and data are stored for controlling the operation of the side hoisting operation tool 39, the one side radio wave transmitter 40a and the other side radio wave transmitter 40b, the terminal side display device 41, the terminal side communication device 42, and the like.

The terminal-side control device 43 includes the direction calculating operation tool 34, the suspended load moving operation tool 35, the terminal-side turning operation tool 36, the terminal-side expansion/contraction operation tool 37, the terminal-side main drum operation tool 38m, the terminal-side sub-drum operation tool 38s, and the terminal-side operation tool 38s. It is connected to the side hoisting operation tool 39 and can acquire an operation signal consisting of the tilting direction and tilting amount of the operation stick of each operation tool. Further, when the terminal-side control device 43 acquires the operation signal of the direction calculation operation tool 34 , it transmits a signal to the control device 31 via the terminal-side communication device 42 to calculate the direction of the remote control terminal 32 . It is configured. Also, the terminal-side control device 43 is connected to the terminal-side communication device 42 and can transmit and receive various information to and from the control device 31 via the communication device 22 of the control device 31 .

The terminal-side control device 43 acquires each operation acquired from each sensor of the terminal-side turning operation tool 36, the terminal-side telescopic operation tool 37, the terminal-side main drum operation tool 38m, the terminal-side sub-drum operation tool 38s, and the terminal-side raising and lowering operation tool 39. Control signals for the corresponding turning valve 23, expansion/contraction valve 24, undulating valve 25, main valve 26m and sub valve 26s can be generated from the stick operation signal.

The terminal-side control device 43 is connected to the one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b. When the terminal-side control device 43 acquires an operation signal from the direction calculation operation tool 34, the one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b transmit direction calculation radio waves of different frequencies and synchronization signals. When the terminal-side control device 43 acquires the rotation angle θ1 from the control device 31, the terminal-side control device 43 controls the one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b to stop transmitting the direction calculation radio wave and the synchronization signal. .

The terminal-side control device 43 can acquire the image i captured by the camera 9b from the control device 31 via the communication device 22 . The terminal-side control device 43 can acquire the rotation direction and the rotation angle θ1 of the operation direction reference Bo (see the dashed arrow in FIG. 5) with respect to the extension direction of the boom 9 from the control device 31 .

The terminal-side control device 43 is connected to the terminal-side display device 41, and displays various information such as an image i acquired from the control device 31 of the crane device 6 and an arrow G indicating the extending direction of the boom 9 on the terminal-side display device 41. can be made In addition, the terminal-side control device 43 rotates and displays the image i based on the rotation direction and the rotation angle θ1 of the operation direction reference Bo (see the dashed arrow in FIG. 5) with respect to the extension direction of the boom 9 acquired from the control device 31. can be done.

5 and 6, the calculation of the rotation direction and the rotation angle θ1 of the operation direction reference Bo of the remote control terminal 32 with respect to the extension direction of the boom 9 by the control device 31, and the calculation of the image i by the remote control terminal 32 are described below. Display is explained.

As shown in FIG. 5, when the control device 31 acquires the operation signal of the direction calculation operation tool 34 of the remote control terminal 32 via the communication device 22, the radio wave detector 30 detects the direction calculation radio wave and the synchronization signal. to start. In order to calculate the direction of the remote control terminal 32, the radio wave detector 30 receives direction calculation signals having different frequencies from the one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b provided in the remote control terminal 32. Detect radio waves and synchronization signals. The control device 31 acquires the difference in the arrival time of the direction-calculating radio wave of each frequency from the one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b, and determines the time from the radio wave detector 30 to the one-side radio wave transmitter 40a. The one-side distance L(a) and the other-side distance L(b) from the radio wave detector 30 to the other-side radio wave transmitter 40b are calculated respectively. Further, the control device 31 calculates the direction of arrival from the omnidirectional intensity distribution of each direction calculation radio wave. The control device 31 calculates the rotation angle θ1 of the remote control terminal 32 from the extension direction of the boom 9 based on the calculated one-side distance L(a), the other-side distance L(b), and the direction of arrival. The control device 31 transmits the calculated rotation direction and rotation angle θ1 to the terminal-side control device 43 of the remote control terminal 32 via the communication device 22 .

As shown in FIG. 6, when the terminal-side control device 43 of the remote control terminal 32 acquires the rotation direction and the rotation angle θ1 of the remote control terminal 32 with respect to the extension direction of the boom 9 from the control device 31, based on the rotation angle θ1, the terminal-side control device 43 , the baggage W photographed by the camera 9b and the image i of its surroundings and the arrow G displayed on the terminal-side display device 41 are relatively rotated in the other direction by the rotation angle θ1. For example, when the remote control terminal 32 is oriented in one direction (clockwise direction in FIG. 5A) with respect to the extending direction of the boom 9 in the direction of the rotation angle θ1, the terminal-side control device 43 converts the image i and arrow G are relatively rotated in the other direction (counterclockwise direction) by a rotation angle θ1. In other words, the terminal-side display device 41 of the remote control terminal 32 displays the image i from the tip of the boom 9 at the operator's position in accordance with the extension direction of the boom 9 regardless of the orientation with respect to the extension direction of the boom 9. ing.

Next, control of the crane device 6 by the remote control terminal 32 will be described with reference to FIGS. 7 and 8. FIG. Regarding the direction of the crane 1, the forward direction of the vehicle 2 is the forward direction, the backward direction is the rearward direction, the right side is the right side when facing forward, and the left side is the left side when facing forward. In the present embodiment, the operating direction reference Bo of the remote control terminal 32 (broken line arrow in FIGS. 5 to 8) is the upward direction of the remote control terminal 32 (displayed on the suspended load moving operation tool 35 and the terminal side display device 41). arrow Aa direction). The operation direction reference Bo of the remote control terminal 32 is a reference for calculating the moving direction of the load W to be moved by the crane device 6 of the crane 1 (the operating direction of the tip of the boom 9), and the suspended load moving operation tool 35 is a common reference for calculating the control signal for the crane device 6 from the operation signal when the is tilted at the tilting angle θ2. Also, regarding the rotation angle θ1 and the tilt angle θ2, the counterclockwise direction from the arrow Aa direction is the positive direction, and the clockwise direction from the arrow Aa direction is the negative direction, and each sign is used to adjust the angle.

As shown in FIG. 7, the operator holding the remote control terminal 32 remotely controls the crane 1 from the left side of the tip of the boom 9 in plan view. When the control device 31 of the crane device 6 acquires the operation signal of the direction calculation operation tool 34 from the remote control terminal 32, the direction transmitted from the one side radio wave transmitter 40a and the other side radio wave transmitter 40b of the remote control terminal 32 Activate the radio wave detector to detect the calculation radio waves. The control device 31 detects direction-calculating radio waves having different frequencies and synchronization signals, and calculates the rotation direction and the rotation angle θ1 of the remote control terminal 32 with respect to the extending direction of the boom 9 (see FIG. 5). In the present embodiment, the remote control terminal 32 is held by the operator while being rotated clockwise with respect to the extending direction of the boom 9 by a rotation angle θ1.

The control device 31 transmits the rotation direction and the rotation angle θ1 of the remote control terminal 32 to the terminal-side control device 43 of the remote control terminal 32 via the communication device 22 . Based on the rotation direction and rotation angle θ1 of the remote control terminal 32 acquired from the control device 31, the terminal-side control device 43 relatively rotates the image i including the package W transmitted together counterclockwise by the rotation angle θ1. Let

The terminal-side control device 43 (see FIG. 4) is the angle between the operation direction reference Bo, which is the upward direction of the remote control terminal 32 acquired from the suspended load moving operation tool 35, and the tilting direction of the control stick. Based on the operation signal for the tilting angle θ2 and the amount of tilting, the moving direction, moving angle θ, and moving speed of the load W from the operation direction reference Bo are calculated.

As the tilting operation of the suspended load moving operation tool 35 of the remote control terminal 32 in an arbitrary direction, for example, when the remote control terminal 32 is tilted in the direction of the operation direction reference Bo that is the upward direction (tilt angle θ2 = 0° ), the terminal-side control device 43 sends an operation signal about the tilt angle θ2, which is the angle of the operation stick tilted in the direction of the operation direction reference Bo (the direction of the arrow of the dashed line), and the amount of tilt, to the suspended load moving operation tool 35 (not shown). Acquired from the sensor. Further, based on the acquired operation signal and rotation angle θ1, the terminal-side control device 43 moves the load W in one direction (clockwise direction) with respect to the extending direction of the boom 9 by moving angle θ=rotation angle θ1+tilting angle θ2= A control signal for moving the load W at a moving speed corresponding to the moving direction and tilting amount of the rotation angle θ1 is calculated. That is, the terminal-side control device 43 is configured to transmit a control signal for moving the tip of the boom 9 (load W) in the tilting direction of the suspended load moving operation tool 35 to the crane device 6 . Based on the movement angle θ and the tilting amount calculated by the terminal-side control device 43, the remote control terminal 32 operates the corresponding turning valve 23, expansion/contraction valve 24, hoisting valve 25, main valve 26m, and sub valve 26s. A control signal is generated and transmitted to the crane 1 by the terminal side communication device 42 .

As shown in FIG. 8 , as an operation of tilting the suspended load moving operation tool 35 of the remote control terminal 32 in an arbitrary direction, for example, one direction ( clockwise (clockwise)), the terminal-side control device 43 determines the tilt angle θ2, which is the angle of the operation stick tilted in one direction from the operation direction reference Bo, and the tilt amount. is acquired from a sensor (not shown) of the suspended load moving operation tool 35 . Further, from the obtained operation signal and the rotation angle θ1, the terminal-side control device 43 moves the load W from the extension direction of the boom 9 according to the movement direction and the tilting amount of the movement angle θ=rotation angle θ1+tilt angle θ2. A control signal for moving the load W at a speed is calculated. Based on the movement angle θ and the tilting amount calculated by the terminal-side control device 43, the remote control terminal 32 operates the corresponding turning valve 23, expansion/contraction valve 24, hoisting valve 25, main valve 26m, and sub valve 26s. A control signal is generated and transmitted to the crane 1 by the terminal side communication device 42 .

The crane 1 moves the load W in one direction from the extending direction of the boom 9 at a movement angle θ (see the black arrow). That is, the crane 1 moves the load W based on the rotation angle θ1 of the remote control terminal 32 calculated with reference to the extension direction of the boom 9 and the acquired tilting direction θ2 of the suspended load moving operation tool 35 . As a result, the crane 1 controls the crane 1 to convey the load W in the same direction as the tilting operation direction of the suspended load moving operation tool 35 even if the remote control terminal 32 is rotated from the extending direction of the boom 9. A signal can be generated.

With this configuration, the remote control terminal 32 is configured with the one-side radio wave transmitter 40a and the other-side radio wave transmitter 40b. The rotation angle θ1 of the remote control terminal 32 can be accurately and easily calculated from the radio wave intensity in all directions, the interval P, and the arrival time of the direction calculation radio wave. Further, in the crane 1, when the suspended load moving operation tool 35 of the remote control terminal 32 is operated to tilt, the remote control terminal 32 generates a control signal considering the rotation angle θ1 of the remote control terminal 32, and the operation direction is changed. The tip of boom 9 moves. Therefore, the remote control terminal 32 does not lose recognition of the operation direction of the crane 1 with respect to the operation direction of the load moving operation tool 35 during remote control by the operator. As a result, erroneous operation during remote operation of the crane 1 can be prevented, and the remote operation of the crane 1 can be performed easily and simply.

The above-described embodiment merely shows typical forms, and various modifications can be made without departing from the gist of one embodiment. It goes without saying that it can be embodied in various forms, and the scope of the present invention is indicated by the description of the scope of the claims. Including changes.

1 Crane 6 Crane Device 9 Boom 30 Radio Wave Detector 31 Control Device 32 Remote Control Terminal 34 Standard Change Operation Tool 35 Lifted Load Moving Operation Tool 40a One Side Radio Wave Transmitter 40b Other Side Radio Wave Transmitter 43 Terminal Side Control Device

Claims (3)

A work vehicle equipped with a remotely operated work device,
a remote control terminal having a first operation unit for remotely operating the work device based on an operation direction reference, and a control unit configured to communicate with the control device of the work device and for controlling the operation of the remote control terminal; , and
The remote control terminal is provided with a radio wave transmitter for calculating the direction of the remote control terminal with respect to the work device,
The work device is provided with information acquisition means for receiving radio waves from the radio wave transmitter,
A control device for the working device,
when the information acquisition means receives radio waves from the radio wave transmitter, calculating the direction of the remote control terminal with respect to the work device based on the received radio waves;
When the signal of the operation unit is acquired, the direction in which the work device operates is calculated based on the calculated direction of the remote control terminal with respect to the work device and the tilting angle of the operation unit with respect to the operation direction reference, and the direction is calculated. to operate the working device,
The work vehicle, wherein the remote control terminal is provided with a second operation unit that causes the work device to receive radio waves from the radio wave transmitter . 2. The work vehicle according to claim 1, wherein at least two of said radio wave transmitters are arranged at predetermined intervals in said operation terminal. A remote control terminal for a work device provided in a work vehicle,
a radio wave transmitter for calculating the direction of the remote control terminal with respect to the working device;
a first operation unit that remotely operates the work device based on an operation direction reference of the remote control terminal;
a second operation unit that causes the working device to receive radio waves from the radio wave transmitter;
a control unit configured to be communicable with a control device of the work device and configured to control the operation of the remote control terminal;
when the first operation unit is operated, a signal for operating the work device is transmitted to a control device of the work device based on the tilt angle of the first operation unit with respect to the operation direction reference;
A remote control terminal that transmits radio waves for calculating a direction of the remote control terminal with respect to the work device to a control device of the work device when the second operation unit is operated.

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