JP3671326B2 - Remotely operated power control device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a remote-operated power control device, and more particularly, to a remote-operated power control device attached to a workbench provided at the tip of an insulating boom.
[0002]
[Prior art]
Some aerial work vehicles are constructed by pivotally supporting a telescopic boom that can be freely expanded and retracted on a swivel provided on the vehicle body, and by providing a work table at the tip of the telescopic boom. . Since this aerial work vehicle may be used for aerial work such as the construction of power distribution facilities such as electric wires, the telescopic boom to which the workbench is attached is composed of an insulating member such as FRP. Electrical insulation between the vehicle bodies can be achieved, and construction of power distribution equipment can be performed safely. In addition, there is a work table provided with a leveling device for correcting the tilt of the work table in order to further secure the safety of the distribution facility. The leveling device can be operated by a lower controller provided on the vehicle body.
[0003]
By the way, there is an electric type leveling device, and a controller for controlling the electric leveling device includes an upper controller provided on a work table in addition to a lower controller provided on a vehicle body.
[0004]
[Problems to be solved by the invention]
However, since the upper controller uses a battery mounted on the work table as a power supply source, an operator needs to get on the work table and supply power to the upper controller in order to operate the upper controller. For this reason, when the operation of the telescopic boom is controlled by the lower controller without turning on the power supply of the upper controller, the leveling device does not operate and the work table cannot be maintained in the horizontal direction.
[0005]
The present invention has been made in view of such problems, and a power supply device such as an electric leveling device that can turn on the power of the upper controller from the lower part of the vehicle without an operator getting on the work table. The purpose is to provide.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, a remote-operated power supply control device according to the present invention includes a main body portion and an operating portion that is separated from the main body portion and is electrically insulated. The operation unit includes a power source (for example, the battery 27 in the embodiment), an electric operation device (for example, the leveling device 33 in the embodiment) that operates by receiving power supply from the power source, and electrically between the power source and the electric operation device. An electrical switch (for example, the pressure switch 39 in the embodiment) for connection or disconnection is provided, and the electrical switch is a hydraulic operation type switch that is operated under oil pressure. The main body is provided with a hydraulic pressure supply means for supplying hydraulic pressure (for example, the hydraulic pressure generation switch 25, the switching valve 61, and the hydraulic power source 63 in the embodiment). The hydraulic pressure supply means and the electrical switch are oil paths made of an insulating material. Communicate. The hydraulic pressure supplied by the hydraulic pressure supply means is transmitted to the electrical switch through the oil passage to operate the electrical switch, electrically connects the power source and the electrical actuator, and the power of the power source is supplied to the electrical actuator. The
[0007]
In order to start the electric actuator, the hydraulic pressure supplied by the hydraulic pressure supply means is transmitted to the electric switch via the oil passage to operate the electric switch, and the power source and the electric actuator are electrically connected. , Supplying power from the power source to the electric actuator.
[0008]
The electric operating device operates upon receiving power supply.For example, an electric leveling device provided on the workbench or an upper controller provided on the workbench to control the operation of an operation target such as a telescopic boom is provided. It can be illustrated. The hydraulic pressure supply means has a function of supplying hydraulic pressure. For example, when all of the cylinder composed of the rod and the bottom and the outrigger jack are grounded, the hydraulic power source connected to this and the hydraulic pressure source are switched. In this case, it is possible to exemplify the one composed of a switching valve for supplying the oil pressure to the electric switch.
[0009]
In addition, a self-holding circuit is electrically provided between the electric actuator and the power source, and when the hydraulic pressure is supplied by the hydraulic pressure supply means, the self-holding circuit is activated only by temporarily connecting the electric switch. It is preferable to maintain an electrical connection between the power source and the electrical actuator. When the hydraulic pressure is supplied by the hydraulic pressure supply means and the electric switch is temporarily connected and operated, the self-holding circuit is activated and the power source and the electric actuator are electrically connected. That is, even if the hydraulic pressure supply means does not continuously supply the oil pressure, the self-holding circuit can maintain the electrical connection between the power source and the electric actuator. Moreover, since there is no power consumption for the operation of the electric switch, waste of power consumption of the power source can be prevented.
[0010]
In the remote control type power control device according to the present invention, the main body is provided on the vehicle body side of the aerial work vehicle, and the operating unit is attached to the tip of the high place moving means provided movably on the vehicle body. and, since a part of the altitude moving means is configured to have an insulating property, the body portion provided on the vehicle body side of the aerial is operated, it is possible to operate the operation unit. In other words, in order to operate the electric actuator attached to the tip of the high-altitude moving means, it is only necessary to operate the hydraulic pressure supply means of the main body provided on the vehicle body side of the high-altitude work vehicle. It is not necessary to turn on the electric actuator directly by going to the tip of the moving means. For this reason, an electric actuator can be remotely operated from the lower part of an aerial work vehicle.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. This embodiment shows an aspect of an aerial work vehicle having a telescopic boom that is telescopic and turnable on a vehicle body. First, before describing the remote operation type power supply control device of the present invention, an aerial work vehicle equipped with this remote operation type power supply control device will be described.
[0012]
As shown in FIG. 1, the aerial work vehicle 1 is turnable by an outrigger jack 5 that supports the vehicle body 3 at four positions on the front, rear, left and right sides of the vehicle body 3 and a hydraulic motor (not shown) at the rear upper part of the vehicle body 3. And a swivel base 7. A base end portion of the telescopic boom 9 is pivotally supported on the upper part of the swivel base 7. The telescopic boom 9 is raised and lowered by the telescopic action of a boom hoisting cylinder 11 provided between the swivel base 7 and the telescopic boom 9.
[0013]
A vertical post 13 is provided at the tip of the telescopic boom 9, and an electric leveling device (not shown) is provided on the vertical post 13. The leveling device has a function of keeping the work table 15 horizontal at all times. A swivel arm 17 is provided in the upper part of the vertical post 13 so as to protrude in the horizontal direction, and is formed so as to be swivelable with respect to the vertical post 13 by a hydraulic motor (not shown). A work table 15 is provided at the tip of the swivel arm 17.
[0014]
Next, a remote operation type power supply control device will be described. As shown in FIG. 2, the remote operation type power supply control device (hereinafter referred to as “power supply control device”) 19 includes an operation unit 21 and an operation unit 23. The operation unit 21 includes a hydraulic pressure generation switch 25 that generates oil pressure, and the operation unit 23 includes a battery 27, a relay 29, an upper controller 31, a leveling device 33, a self-holding circuit 35, a diode 37, and a pressure switch 39. ing. The operating unit 23 includes a power supply circuit 41 that supplies power to the upper controller 31 from the battery 27, a relay drive circuit 43 that operates the relay 29, and a connection holding circuit 45 that maintains an electrical connection of the switch unit 29a of the relay 29. have. The power supply circuit 41 includes a battery 27, a switch 29a for the relay 29, and an upper controller 31 in that order from the downstream side, and the relay drive circuit 43 has a battery 27, a pressure switch 39, a diode 37, and a relay in that order from the downstream side. The connection holding circuit 45 has a self holding circuit 35, a diode 37, and a relay driving unit 29b in this order from the downstream side.
[0015]
The upper controller 31 has a function of controlling the operation of the leveling device 33, and the self-holding circuit 35 has a function of holding the connection of the contact of the switch unit 29 a of the relay 29 and continuously supplying power to the upper controller 31. doing. A lower controller 47 provided on the vehicle body 3 side is connected to the upper controller 31 via an optical communication cable 49. By inserting the battery 27 into the upper controller 31, the lower controller 47 passes through the upper controller 31. The operation of the leveling device 33 can be controlled. The pressure switch 39 has a switch part 39a for connecting the contact 57 and a pressing part 39b for pressing the switch part 39a, and the pressing part 39b receiving the hydraulic pressure presses the switch part 39a to contact the contact 57 of the switch part 39a. It has a function of electrically connecting the two.
[0016]
An oil passage 51 made of an insulating material communicates between the oil pressure generation switch 25 and the pressing portion 39 b of the pressure switch 39. When the oil pressure generation switch 25 is pressed, the oil in the oil passage 51 is compressed and transmitted to the pressing portion 39b, and the piston 53 of the pressing portion 39b extends toward the switch portion 39a and comes into contact with the connection plate 55 of the switch portion 39a. Then, the connecting plate 55 is moved in the direction of the contact 57.
[0017]
Next, a case will be described in which the work table 15 is moved to a predetermined height position without an operator getting on the work table 15 using the power supply control device 19. First, the work platform 1 is moved to the work site with the work table 15 stored on the vehicle body 3. Then, the outrigger jack 5 is extended and grounded to stably support the vehicle body 3.
[0018]
Next, the operator presses the oil pressure generation switch 25 to cause the upper controller 31 to insert the battery 27. When the oil pressure generation switch 25 is pressed, the oil in the oil passage 51 is compressed and the oil pressure is transmitted to the pressing portion 39b, and the piston 53 of the pressing portion 39b extends to the switch portion 39a side to connect the switch portion 39a. Abutting on the plate 55, the connection plate 55 electrically connects the contacts 57 temporarily. When the contacts 57 are electrically temporarily connected, the battery 27 and the drive part 29b of the relay 29 are electrically connected, the drive part 29b is activated, the switch part 29a of the relay 29 is activated, and the relay 29 is electrically connected between the contacts 57 and the battery 27 and the upper controller 31 are electrically connected. The power of the battery 27 is supplied to the upper controller 31. At the same time, the self-holding circuit 35 is actuated to actuate the drive unit 29b of the relay 29, and the electrical connection of the switch unit 29a of the relay 29 is retained, so that the power of the battery 27 is continuously supplied to the upper controller 31. Is done.
[0019]
Next, when the battery 27 is inserted into the upper controller 31, the information is transmitted to the lower controller 47 via the optical communication cable 49, and the leveling device 33 can be operated by the lower controller 47. Then, the operator uses the lower controller 47 to operate the telescopic boom 9 and also operates the leveling device 33 to move the work table 15 to a predetermined high position and maintain the work table 15 in the horizontal direction. To do.
[0020]
Further, the power supply control device of the present invention may be as shown in FIG. As for the power supply control device 59, only the differences from the power supply control device 19 described above will be described. The power supply control device 59 is different from the power supply control device 19 described above in that the self-holding circuit 35 and the relay 29 described above are not provided and the function of the pressure switch 39 is different. The pressure switch 39 is a piston 53 by the pressing of a hydraulic generator switch 25 is extended, the pressure switch 39 press the hydraulic pressure generating switch 25 once the piston 53 is kept in a stretched state, extended press the hydraulic pressure generating switch 25 again The configured piston 53 is configured to be reduced.
[0021]
In order to insert the battery 27 into the upper controller 31, the operator presses the oil pressure generation switch 25, compresses the oil in the oil passage 51, this oil pressure is transmitted to the pressing portion 39b, and the piston 53 of the pressing portion 39b The pressure switch 39 extends to the switch portion 39a side, the piston 53 comes into contact with the connection plate 55 of the switch portion 39a, and the contacts 57 of the switch portion 39a are electrically connected. Since the piston 53 remains in the extended state, the contact 57 of the switch unit 39a is continuously electrically connected, and the power of the battery 27 is continuously applied to the upper controller 31.
[0022]
On the other hand, in order to cut off the insertion of the battery 27 into the upper controller 31, the oil pressure generation switch 25 is pressed again to reduce the oil pressure in the oil passage 51 and reduce the piston 53, thereby causing the contact point 57 of the switch portion 39a. Electrically interrupts the gap.
[0023]
Even if an operator does not get on the work table 15 and put the battery 27 into the upper controller 31, the battery 27 is put into the upper controller 31 by pressing the oil pressure generation switch 25 provided on the vehicle body 3 side. Can do. Therefore, the battery 27 can be inserted into the upper controller 31 from the lower part of the vehicle to control the operation of the leveling device 33, and the use of the pressure switch 39 using hydraulic pressure eliminates the need for electric power to operate the switch. Thus, the power consumption of the battery 27 can be saved.
[0024]
Note that the switch portion 39a of the pressure switch 39 is not limited to that described above, and the connection plate 55 is moved by pressing the hydraulic pressure generation switch 25 to maintain the connection between the contacts 57, and the connection plate 55 is pressed again. A switch that opens the connection between the contacts 57 and a toggle switch combined with a spring so as to provide a snap action for quickly opening and closing the contacts 57 can be used.
[0025]
Further, instead of the pressure generation switch 25, a switching valve 61 and a hydraulic pressure source 63 may be provided on the upstream side of the oil passage 51 as shown in FIG. The switching valve 61 is a two-port two-position switching valve. When the solenoid 65 is excited, the hydraulic source 63 and the oil passage 51 communicate with each other through the switching valve 61, and the hydraulic pressure from the hydraulic source 63 is supplied into the oil passage 51. Is done. A lower controller 47 is electrically connected to the solenoid 65, and when the lower controller 47 detects that all of the outrigger jacks 5 shown in FIG. The lower controller 47 excites the solenoid 65. That is, when it becomes possible to perform work at a high place, the lower controller 47 excites the solenoid 65 of the switching valve 61 to operate the pressure switch 39. Therefore, it is possible to remotely operate the pressure switch 39 without an operator getting on the work table 15 shown in FIG.
[0026]
【The invention's effect】
According to the remote operation type power supply control device according to the present invention, the hydraulic pressure supplied by the hydraulic pressure supply means is transmitted to the electric switch through the oil passage to operate the electric switch, and the electric power is supplied to the electric operation device. Therefore, the electric actuator can be remotely operated, and electric power for operating the electric switch using hydraulic pressure is not necessary, and the power consumption of the battery can be saved.
[0027]
In addition, a self-holding circuit is electrically provided between the electric actuator and the power source, the hydraulic pressure is supplied by the hydraulic pressure supply means, the electric switch is temporarily connected and the self-holding circuit is operated, and the power source and the electric power are supplied. When the actuators are electrically connected to each other, the self-holding circuit can maintain the electrical connection between the power source and the electric actuator without continuously supplying the hydraulic pressure by the hydraulic pressure supply means.
[0028]
Furthermore, the main body part is provided on the vehicle body side of the aerial work vehicle, the operating part is attached to the tip part of the high place moving means provided movably on the vehicle body, and a part of the high place moving means is insulated. If so, the electric actuator can be remotely operated from the lower part of the aerial work vehicle.
[Brief description of the drawings]
FIG. 1 is a front view of an aerial work vehicle equipped with a remote operation type power supply control device according to an embodiment of the present invention.
FIG. 2 shows an electric circuit of the remote operation type power supply control device according to the embodiment of the present invention.
FIG. 3 shows an electric circuit of the remote operation type power supply control device according to the embodiment of the present invention.
FIG. 4 shows a switching valve connected to the remote operation type power supply control device according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Aerial work vehicle 3 Car body 9 Telescopic boom 19 Remote operation type power supply control device 21 Operation part 23 Actuation part 25 Oil pressure generation switch 27 Battery 33 Leveling device 35 Self-holding circuit 39 Pressure switch 51 Oil path 61 Switching valve

Claims (2)

A remote operation type used in an aerial work vehicle having a vehicle body and a high place moving means movably provided on the vehicle body, wherein a part of the high place moving means has an insulating property A power control device,
A main body portion provided on the vehicle body side, and an operating portion that is attached to a tip portion of the height moving means and is electrically insulated from the main body portion ,
The operating unit is provided with a power source, an electric operating device that operates by receiving power supply from the power source, and an electric switch that electrically connects or disconnects the power source and the electric operating device,
The electrical switch is a hydraulically operated switch that is actuated by receiving hydraulic pressure, and the main body is provided with hydraulic supply means for supplying hydraulic pressure. The hydraulic supply means and the electrical switch are made of an insulating material. Communicate with the oil passage
The hydraulic pressure supplied by the hydraulic pressure supply means is transmitted to the electric switch through the oil passage to operate the electric switch, and electrically connects the power source and the electric operating device. A remote operation type power supply control device, wherein the power of the power supply is supplied to the remote control type power supply control device.   A self-holding circuit is electrically provided between the electric actuating device and the power source, and when the hydraulic pressure is supplied by the hydraulic pressure supply means, the electric switch is only temporarily connected and operated. The remote control type power supply control device according to claim 1, wherein the remote control type power supply control device is operated to maintain an electrical connection between the power supply and the electric operation device.

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