JP2578618Y2 - Remote control device for hydraulic crane - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a remote control device for a hydraulic crane mounted on a chassis frame between a truck cab and a loading gate, and more particularly to remote control via an operation signal superimposed on radio waves. The present invention relates to a remote control device.

[0002]

2. Description of the Related Art A conventional remote control device for a hydraulic crane will be described with reference to FIGS. As shown in FIG. 3, the hydraulic crane A is mounted on a chassis frame 5 between the cab 2 of the truck 1 and the torii 4 of the carrier 3. As is well known, the hydraulic crane A includes a base mounted on the chassis frame 5, a swivel mounted on the base so as to be able to swing and drive, a telescopic boom mounted on the swivel so as to be able to move up and down, and a tip of the telescopic boom. The lifting unit is provided with a suspending device which is suspended so as to be capable of driving up and down. However, since the configuration is well known, a detailed description thereof will be omitted.

The hydraulic actuators for driving the hydraulic crane A are driven and controlled by hydraulic control valve means 6 (FIG. 4). The hydraulic control valve means 6 includes a four-way three-position type hydraulic switching valve corresponding to each hydraulic actuator.

As shown in FIG. 4, a remote operation device is provided with a portable operation signal transmitting section 7 for transmitting an operation signal for controlling the driving of the hydraulic crane A by superimposing it on a radio wave, and at right and left positions of the torii 4 respectively. A pair of left and right receiving antennas 8 attached to receive radio waves from the operation signal transmitting unit 7
a and 8a, which are configured similarly to valve control means 8 for controlling the hydraulic control valve means 6 of the hydraulic crane A in response to an operation signal superimposed on the received radio wave. In this example, a pair of left and right receiving antennas 8a, 8a are provided at the left and right ends of the torii 4, respectively, and are attached to the front ends of the antenna supports 9, 9 protruding forward (in the traveling direction of the vehicle 1) from the torii 4. I have. The receiving antennas 8a, 8a are attached to the front ends of the antenna supports 9, 9 so that the antenna rods of the receiving antennas 8a, 8a are vertically oriented. In this example, a pair of left and right receiving antennas 8a, 8a is shown attached to the torii 4, but these pair of left and right receiving antennas 8a, 8a are shown.
May be attached to the left and right positions of the cab 2 or the left and right positions of the hydraulic crane A.

[0005] The configuration in which radio waves are received by both the pair of left and right receiving antennas 8a, 8a is that an obstacle (between the operation signal transmitting unit 7 and the receiving antennas 8a, 8a serving as the radio wave receiving unit) is provided. The range in which the cab 2 of the truck 1, the torii 4, or the load of the truck 1 is present is reduced as much as possible, and the radio wave receiving section (the receiving antenna 8) of the valve driving means 8 is provided.
a, 8a) is to ensure that the radio wave on which the operation signal from the operation signal transmitting unit 7 is superimposed can be received.
The conventional hydraulic crane remote control device configured as described above is capable of remotely operating the hydraulic crane A with a portable operation signal transmitting unit, and has been widely used in recent years. It is.

[0006]

By the way, in the above-mentioned conventional remote control device, a pair of left and right receiving antennas 8a, 8a attached respectively to the left and right positions of the torii 4 or the cab 2 as components of the valve driving means 8 are provided. , Truck 1
Is fixedly mounted within the vehicle width limit of the truck 1 so as not to hinder the traveling of the vehicle. Therefore, the remote control device of this type has a range in which the driver's cab 2 or the torii 4 of the truck 1 becomes an obstacle and radio waves do not directly reach the receiving antennas 8a, 8a, that is, the operation signal transmitting unit 7 carried by the operator.
A range in which radio waves from the vehicle 1 do not directly reach any of the receiving antennas 8a, 8a (hereinafter referred to as a remote control disabled range) exists in front of or behind the truck 1. The presence of the non-remote control area reduces the efficiency of crane operation using the remote control device.

The remote control device of the hydraulic crane of the present invention exists in front and rear of the traveling direction of the truck 1,
A new hydraulic crane of the remote control range in which the driver's cab 2 or the torii 4 of the truck 1 becomes an obstacle and radio waves do not directly reach the receiving antennas 8a, 8a is much smaller than the conventional one. It is an object to provide a remote control device.

[0008]

In order to achieve the above object, the remote control device for a hydraulic crane according to the present invention is configured as follows. A remote operation device for a hydraulic crane A mounted on a chassis frame 5 between an operator's cab 2 of a truck 1 and a torii 4 of a loading platform 3, wherein an operation signal for controlling the driving of the hydraulic crane A is transmitted to a radio wave. A portable operation signal transmitting unit 7 that transmits the signals in a superimposed manner, and a pair of left and right receiving antennas 8a, 8a that are respectively attached to the right and left positions of the torii 4 or the driver's cab 2 and receive the radio waves from the operation signal transmitting unit 7. A pair of left and right receiving antennas 8a provided in a similar manner with valve control means 8 for controlling a hydraulic control valve means 6 of the hydraulic crane A in response to an operation signal superimposed on a received radio wave. , 8a can be changed in posture between a protruding position protruding beyond the vehicle width of the truck 1 and a storage position stored in the vehicle width. Location.

[0009]

In the remote control device for a hydraulic crane according to the present invention, the pair of left and right receiving antennas 8a, 8a of the valve control means 8 are stored within the width of the truck 1 when the truck 1 travels. When the hydraulic crane A is to be remotely operated by the remote control device in the retracted storage position, the pair of left and right receiving antennas 8a, 8a protrude beyond the width of the truck 1 from both sides of the cab 2 or the torii 4. Make it overhang position. At the overhang position of the receiving antennas 8a, 8a, since the receiving antennas 8a, 8a protrude outside the vehicle width, the driver's cab 2 or the torii 4 of the truck 1 becomes an obstacle, and radio waves are directly transmitted to the receiving antennas 8a, 8a. The range of remote control that cannot be reached is greatly reduced compared to the conventional one, and the crane work efficiency is improved accordingly.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a remote control device for a hydraulic crane according to the present invention will be described below with reference to FIGS. The hydraulic crane remote control device of the present invention differs from the conventional one only in the mounting configuration of the pair of left and right receiving antennas 8a, 8a. Is also used as a synonym in the following description.

As shown in FIGS. 1 and 2, a pair of left and right receiving antennas 8a, 8a are provided at the left and right ends of the torii 4, respectively, and project from the torii 4 forward (in the traveling direction of the vehicle 1). Attached to the front end of 9 is the same as that described in the above description of the prior art.

In the remote control device of the present invention, the pair of left and right receiving antennas 8a, 8a protrude from the storage position (the position indicated by the solid line in FIG. 1) stored within the vehicle width of the truck 1. It is attached to the torii gate 4 so that the posture can be changed between the overhang position (the position indicated by a virtual line in FIG. 1). That is, each antenna support 9, 9 is fixedly attached to the torii 4 by a fixed portion 9a, and the fixed portion 9a is provided with a vertical shaft 9
arm part 9c mounted so as to be freely rotatable horizontally through b
It is composed of The receiving antenna 8 is provided at the tip of the arm 9c so that the antenna rod is in the vertical direction.
a is attached. Each antenna support 9, 9 can move the receiving antenna 8a, 8a to the overhang position by horizontally rotating the arm portion 9c outward of the vehicle width, and also horizontally rotate within the vehicle width. By doing so, the receiving antennas 8a, 8a can be moved to the storage position.

Reference numerals 10 and 10 denote antenna supports 9 and 9 respectively.
Of the antenna supports 9, 9 by energizing these electromagnetic actuators 10, 10 so that the arm portions 9c, 9c of the antenna supports 9, 9 are energized. The receiving antennas 8a and 8a are turned to the outside of the vehicle width to move to the overhang position. The arm portions 9c, 9c of the antenna supports 9, 9 are rotationally biased inward of the vehicle width by a spring (not shown).
By turning off the power to 0, 10 the receiving antenna 8
a, 8a rotate to the storage position.

As shown in FIG. 2, the control of energization of the electromagnetic actuators 10, 10 is performed by a switch 12 interposed between a power supply 11 provided at an appropriate position of the hydraulic crane A or the truck 1 and the electromagnetic actuators 10, 10. It has become.

Next, the operation will be described. When the truck 1 is traveling, the switch 12 is turned off. In this state, the power supply to the electromagnetic actuators 10, 10 is cut off, so that the receiving antennas 8a, 8a are at the storage positions stored within the vehicle width.

When the truck 1 is stopped and the hydraulic crane is driven and controlled via a remote control device, and the crane operation is performed, the switch 12 is connected. Then, the electromagnetic actuators 10, 10 are energized, and the receiving antenna 8
a, 8a move to the overhang position protruding from the vehicle width. In this state, since the receiving antennas 8a, 8a protrude outside the width of the vehicle, the driver's cab 2 or the torii 4 of the truck 1 becomes an obstacle and the radio wave cannot reach the receiving antennas 8a, 8a directly. However, the crane operation efficiency is greatly improved as compared with the conventional one.

In the above embodiment, the receiving antenna 8
Although the electromagnetic actuators 10 and 10 are configured to perform the posture change operation between the overhang position and the storage position, the posture change operation may be performed manually. is there. In the above embodiment, the switch 12 for controlling the energization of the electromagnetic actuators 10 for changing the attitude of the receiving antennas 8a between the extended position and the retracted position is directly operated by hand. Of course, the operation of the switch 12 may be performed via a radio wave from the operation signal transmitting unit 7.

[0018]

The remote control device of the hydraulic crane according to the present invention, which is constructed and operates as described above, has a simple configuration in which only the mounting configuration of the pair of left and right receiving antennas 8a, 8a of the conventional remote control device is changed. Nevertheless, the range in which remote operation is not possible can be greatly reduced, which greatly contributes to improving the efficiency of crane work.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view of a hydraulic crane provided with a remote control device of the present invention.

FIG. 2 is an explanatory diagram of the remote control device of the present invention.

FIG. 3 is a plan view for explaining a hydraulic crane provided with a conventional remote control device.

FIG. 4 is an explanatory diagram of a conventional remote control device.

[Explanation of symbols]

 A Hydraulic Crane 1 Truck 2 Operator's Cab 3 Carrier 4 Torii 5 Chassis Frame 6 Hydraulic Control Valve Means 7 Operation Signal Transmitting Unit 8 Valve Driving Means 8a, 8a Receiving Antenna 9,9 Antenna Support 9a, 9a Fixed Part 9b, 9b Vertical Axis 9c, 9c Arm unit 10, 10 Electromagnetic actuator 12 Switch

Claims (1)

(57) [Scope of request for utility model registration] 1. A hydraulic crane mounted on the chassis frame between the cab and the bed of Torii track far
A remote operation device, comprising: a portable operation signal transmitting unit that transmits an operation signal for controlling driving of a hydraulic crane superimposed on a radio wave; and the operation signal transmission unit attached to each of right and left positions of the torii or a driver's cab. A pair of left and right receiving antennas for receiving radio waves from the unit, and a valve control means for controlling the hydraulic control valve means of the hydraulic crane in response to an operation signal superimposed on the received radio waves. The hydraulic crane characterized in that the pair of left and right receiving antennas is configured to be capable of changing its attitude between a projecting position projecting beyond the vehicle width of the truck and a storage position stored within the vehicle width. Remote control device.