JPH0210239Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a remote control device for a ladder vehicle.

B. Prior art In recent years, buildings in cities have become increasingly high-rise.
Ladder vehicles that can cope with this problem are also increasingly being used as fire engines. In general, such a ladder vehicle uses the turntable to perform operations such as the rotation of a turntable mounted on the vehicle body, the up/down and extension of a ladder mounted on the turntable, and the raising and lowering of an elevator installed on the ladder so that it can be raised and lowered. It is controlled by operating the control lever on the installed control table.

Incidentally, a water spray nozzle for spraying water is attached to the tip of the ladder of the above-mentioned ladder vehicle. The water nozzle is operated by a firefighter stationed at the tip of the ladder. Note that an elevator installed on the ladder so that it can be raised and lowered is used to transport the firefighter to the top of the ladder.

However, when a firefighter at the top of a ladder operates a water nozzle to extinguish a fire, even if the firefighter wishes to move the ladder, he or she cannot directly move the ladder. For this reason, intercoms etc. are used to communicate with the workers on the ground, and the workers on the ground operate the ladders.
One drawback was that the firefighter at the top of the ladder could not place the ladder in the desired position.

It is also conceivable to use radio control to control the operation console installed on the turntable from inside the elevator, but when a large number of fire engines are working to extinguish a fire at a fire scene, each ladder car It was also not possible to operate the ladders using radio controls, as there was a risk that operating the ladders using radio controls would cause interference and make it impossible to operate the ladders accurately.
Also, Publication No. 34717 of 1983 and Publication No. 50-
Publication No. 34718 describes that the upper part of a lifter with a transmitting section inside is supported by a strip for vertical movement of the lifter, and a flexible strip consisting of an electric wire for operation connected to the operating switch of the transmitting section is stretched over both strips. In some cases, the lifter is held under tension by winding drums that are wound in opposite directions to each other in order to hold the lifter.
As the operating wire is repeatedly wound under tension as the lifter moves up and down, there is a high risk that the wire will be damaged, and maintenance requires a lot of man-hours.

B. Purpose of the invention: By providing a remote control device that can remotely control the ladder from inside the elevator installed on the ladder of a ladder car without causing interference, the ladder can be freely operated from inside the elevator. .

C. Structure of the invention A remote control device for a ladder vehicle is installed in an elevator 6 installed on a ladder 3 so that it can be raised and lowered freely, and
A transmitting section 12 that outputs a carrier wave signal for controlling the movement of the wire 5 connected to the output terminal of the transmitting section 12 and suspending and supporting the elevator 6 so as to be able to move up and down near the tip of the ladder 3. A conversion coil 8 is arranged so that the wire 5 passes through it, and a reception section 13 receives the carrier wave signal outputted from the transmission section 12 to the wire 5 via the conversion coil 8 and the captire cable 9. and,
The valve 20 is operated by the receiving section 13 to control the movement of the ladder 3.

D. Embodiment FIG. 1 is a schematic diagram showing an example of a ladder vehicle equipped with a remote control device according to the present invention, and FIG. 2 is a block diagram showing a circuit configuration of the remote control device. In the figure, 1 is a rotary table mounted on a vehicle body 2 of a ladder automobile, and 3 is a ladder mounted on the rotary table 1. 4 is a pulley attached to the upper end of the ladder 3; 5 is a wire hung on the pulley 4;
One end is connected in an electrically insulated manner to an elevator 6 installed on a ladder 3 so that it can be raised and lowered freely, and the other end is wound around a wire winding drum 7 on the turntable 1. By rotating the winding drum 7, the elevator 6 is raised and lowered on the ladder 3. 8 is a pulley 4 attached to the top of the ladder
This is a conversion coil installed near the. This conversion coil 8 is arranged so that the above-mentioned wire 5 passes through the center thereof, and receives a carrier wave signal sent via the wire 5 from a transmitter 12, which will be described later. , a carrier wave signal is sent to a receiving section 13, which will be described later, via a cab tire cable 9. 10 is a cord reel for winding up the cab tire cable 9; 11 is an electric wire for connecting the cab tire cable 9 and a receiving section 13, which will be described later, via the cord reel 10. Reference numeral 12 denotes a transmitting section disposed within the elevator 6 and outputting a carrier wave signal, and reference numeral 13 denotes a receiving section disposed on the turntable for receiving the carrier wave signal. The transmitting unit 12 includes an operating lever 14 for outputting control signals for rotation of the turntable 1, up/down and extension of the ladder 3, and raising/lowering of the elevator 6, and voltage changes caused by operating the operating lever 14. It is composed of an encoder 15 for converting into a predetermined digital signal, and a transmitter 16 consisting of a carrier wave oscillator and a frequency modulator for converting the output signal from the encoder 15 into a carrier wave signal of a predetermined frequency. There is. The output terminal of the transmitter 16 is connected to the wire 5 for raising and lowering the elevator 6. The receiving unit 13 includes a frequency demodulator 17 for receiving the carrier signal outputted from the transmitter 12 to the wire 5 via the conversion coil 8 and the cab tire cable 9, and a frequency demodulator 17 for receiving the carrier signal outputted by the frequency demodulator 17. It is comprised of a decoder 18 for converting the signal back into a digital signal, and a valve controller 19 for controlling a valve 20, which will be described later, using the output from the decoder 18. Then, the turntable 1 is rotated by the output signal from the valve controller 19.
It controls a valve 20 that controls operations such as raising and lowering the ladder 3, extending and contracting it, and raising and lowering the elevator 6.

In the above configuration, in order to control the ladder 3 from inside the elevator 6 using the remote control device according to the present invention, a firefighter on board the elevator 6 must move the operating lever 14 located inside the elevator 6. Just operate it. Then, the voltage change caused by operating the operating lever 14 is converted into a digital signal by the encoder 15, and then converted into a carrier wave signal by the transmitter 16, and the carrier wave signal is propagated onto the wire 5. Then, the signal is input from a conversion coil 8 disposed around the outer periphery of the wire 5 to a frequency demodulator 17 of the receiving section 13 through a cab tire cable 9. The carrier wave signal inputted to the frequency demodulator 17 in this way is inputted to the valve controller 19 through the decoder 18, so the valve controller 19 converts the valve 2 according to the input signal.
0 to control the movement of ladder 3.

E. Effect of the invention As mentioned above, the carrier wave signal output from the transmitter installed in the elevator of the ladder car is transmitted using the wire that suspends and supports the elevator, so the captire can respond to the lifting and lowering of the lifter. There is no need to extend or contract the wire, and since there is no tension connected to the elevator, the load is minimal, there is little risk of damage, and maintenance is easy. If input is input to the installed receiver, a large number of ladder cars can simultaneously output carrier wave signals from the transmitter in the elevator to the receiver on the turntable, and each ladder can be controlled remotely without causing interference. You can reliably control the ladder remotely.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of a ladder vehicle equipped with a remote control device according to the present invention, and FIG. 2 is a block diagram showing a circuit configuration of the remote control device. 3...Ladder, 5...Wire, 6...Lift,
8... Conversion coil, 12... Transmitting section, 13... Receiving section, 20... Valve.

Claims (1)

[Scope of utility model registration request] Ladder A transmitting unit that outputs a carrier wave signal for controlling the operation of a ladder installed in an elevator that is installed in a ladder of a car so that it can be raised and lowered; A conversion coil is placed near the tip of the wire ladder, and the carrier wave signal output from the transmitter to the wire is input via the conversion coil and the captire cable. What is claimed is: 1. A remote control device for a ladder vehicle, comprising: a receiving section for controlling a ladder; and a valve operated by the receiving section to control movement of a ladder.