JPS638520Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a brake interlock device for a refueling vehicle that refuels an object to be refueled, such as an aircraft.

[Conventional technology]

Generally, in this type of refueling truck, a refueling nozzle at the end of a hose connected to a tank mounted on the refueling truck is tightly connected to a fuel inlet of the aircraft in order to refuel the aircraft in large quantities and quickly. When refueling is finished, the refueling nozzle is removed from the aircraft and stored in the refueling nozzle storage of the refueling vehicle.

[Problem that the invention attempts to solve]

However, even though the refueling nozzle is tightly connected to the aircraft, it is often the case that the refueling vehicle is accidentally driven, and in this case, there is a serious problem of damaging not only the hose but also the aircraft.

[Means for solving problems]

This idea was made in view of the above problems,
A refueling vehicle that appropriately refuels an object to be refueled using a refueling nozzle with fuel stored in a tank mounted on a vehicle body, a master cylinder that transmits operating pressure to a wheel cylinder of the refueling vehicle;・A brake lock switch that controls the activation and release of the master cylinder is installed in the brake piping that includes the supply tank that is the pressure source for the cylinder, and this brake lock switch is formed by a 3-port 2-position switching valve. An operating pipe line connected to the primary side port of the lock switch is branched from the brake pipe, and a three-way valve and a switching valve for discharging operating pressure in an emergency are disposed in this operating pipe line, and A refueling system, wherein a valve is selectively switched in response to a signal generated when the refueling nozzle is retracted or not retracted, so that the brakes of the refueling vehicle can be locked when the refueling nozzle is not retracted. The present invention seeks to provide a brake interlock device for vehicles.

[Effect]

Examples of this invention will be described below based on the drawings.

First, the pneumatic brake system of a conventional chassis, which is the principle of construction of the device of this invention, will be explained with reference to FIG. A wheel cylinder 4 in which compressed air at operating pressure supplied from an air tank 3 is installed in the brake body of a wheel (not shown).
It is generally known that the braking action is performed by transmitting the signal to the motor. Furthermore, as shown in FIG. 2, a protection valve 5 and a brake lock switch 6 are installed in the piping that includes the master cylinder 2 and the air tank 3, and the brake lock switch 6 located inside the driver's seat is There is one in which compressed air is fed into the wheel cylinder 4 by manual switching so that the brake can be applied by a system other than the foot brake. This is to ensure braking when parking the vehicle on an uneven road surface. When the lever of the brake lock switch 6 is set to the "brake" position, the compressed air in the air tank 3 is used as a protection brake. It passes through valve 5, through brake lock switch 6, and fills master cylinder 2, which activates wheel cylinder 4 and locks the wheels. Furthermore, when the lever of the brake lock switch 6 is set to ``brake release'', the compressed air filled in the master cylinder 2 is released from the brake lock switch 6 into the atmosphere, the wheel cylinder 4 returns to its original position, and the wheel cylinder 4 returns to its original position. The lock is now being released.

This invention improves a part of the above-mentioned brake system so that the vehicle cannot run unless the refueling nozzle (not shown) is stored in a proper storage device. As shown in the figure.

That is, the brake lock switch 6 is formed by a 3-port, 2-position switching valve, and the operation pipe 7 connected to the primary side port 6a of the brake lock switch 6 is connected to the brake pipe including the master cylinder 2 and the air tank 3. A three-way valve 9 for releasing the compressed air filled in the master cylinder 2 to the atmosphere in an emergency, and an electromagnetic switching valve 10 as a switching means are arranged in the operation pipe 7, which is branched from the pipe 8. There is. Then, the electric switch 11 provided on the holder for storing the refueling nozzle is set so that it is turned "OFF" when the refueling nozzle is stored and "ON" when it is not stored, and is incorporated into the electric circuit 12. The electromagnetic switching valve 10 is operated to switch by means of a relay 13 disposed at.

In addition, the electromagnetic switching valve 10 is connected to the relay 13.
In addition to this, a display or display and alarm means is connected. In other words, when the refueling nozzle is not retracted (the electric switch 11 is ON), the red pilot lamp indicated by 14 lights up and at the same time the buzzer 15 sounds to warn of the abnormality, and the refueling nozzle is retracted (the electric switch is turned ON). When 11 is "OFF", a green pilot lamp indicated by reference numeral 16 lights up.

To explain the operation with reference to Figure 3, (1) the refueling nozzle is stored in the nozzle storage of the refueling vehicle, and (1) - the brake lock switch 6 is in the "open" state (the state shown in Figure 3). The electric switch 11 on the housing is in the "open" state, the green pilot lamp 16 of the relay 13 is lit, and the electromagnetic switching valve 10 is operated to the state shown in FIG. At this time, the air pressure from supply tank 3 is
It comes to 7a and 8a via valve 5,
Since the primary sides of the brake lock switch 6 and the electromagnetic switching valve 10 are closed, no pressure is applied thereto. Afterwards, the air inside the master cylinder 2 is transferred to the brake pipe 8b and the brake pipe 8b.
It is opened to the atmosphere via the lock switch 6, port 6a, operation piping 7b, three-way switch 9, and electromagnetic switching valve 10, and no pressure builds up.
Master cylinder 2 does not transmit hydraulic pressure to wheel cylinders 4. In other words, since the brake lock device does not operate, the vehicle can be driven freely.

(1) - When the brake lock switch 6 is set to "brake", the brake lock switch 6 is in the opposite position to that shown in Fig. 3, and the pressure in the supply tank is applied to the master cylinder via the brake lock switch 6, and - Hydraulic pressure can be generated in cylinder 4 to put the vehicle in a braking state.

(2) Since the refueling nozzle is connected to an aircraft etc. and is not stored in the nozzle storage of the refueling vehicle,
(Switch 11, relay 13, electromagnetic switching valve 10
(2) - When the brake lock switch 6 is operated correctly and is set to "braking" (the brake lock switch 6 is the reverse of the diagram in Figure 3), the pressure in the supply tank will be 5, 8a, 6
The master cylinder is pressurized via the brake, generating hydraulic pressure in the wheel cylinders and braking the vehicle. In addition, at this time, the side branched to the 7a side is 1
0, and 9 and 7b, but is shut on the primary side of 6.

If the driver (2) mistakenly sets the brake lock switch 6 to ``open'' (same as in Figure 3) in order to drive the vehicle with the hose still connected to the aircraft, the pressure in the supply tank will be Via 5, 8a, 7a, 10, 9, 7b,
Since 8b and 2 are pressurized, hydraulic pressure is generated at 4, and the vehicle becomes unable to run, making it safe. In the event of a fire, etc. in an aircraft or refueling truck, and it is necessary to evacuate the aircraft or tanker by tearing off the hose,
Activate the sealed three-way Kotoku 9 in an emergency,
It is also possible to release the brake.

[Effect of idea]

The brake of this invention configured as above
According to the interlock device, when the refueling nozzle is not retracted, the red pilot lamp 14 lights up and at the same time the buzzer 15 sounds to warn of an abnormality, and the vehicle is in a braking state at any time. There is no risk of causing a situation where the refueling vehicle is driven with the refueling nozzle tied to the aircraft as in the conventional case. In addition, when the electromagnetic switching valve 10 and the electric connection are malfunctioning, the compressed air filled in the master cylinder 2 can be quickly released to the atmosphere by the three-way valve 9, so it is safe and the value of its use is Remarkable.

Although the above embodiment describes a pneumatic brake system, it can also be implemented in the same way for a hydraulic brake system, and the switching means may be operated by, for example, pneumatic pressure in addition to an electromagnetic switching valve. A similar effect can be obtained by using a switching valve, and both of these are included in the gist of this invention.

[Brief explanation of the drawing]

1 and 2 are piping diagrams of the brake system which is the principle of the brake interlock device of this invention, and FIG. 3 is a piping diagram of the brake interlock device of this invention. In the figure, 2...master cylinder, 3...
Supply tank (air tank), 6... Brake lock switch, 6a... Port, 7... Operation pipe line, 8... Brake pipe line, 9... Three-way valve,
10... Solenoid switching valve (switching means), 11... Electric switch, 13... Relay.

Claims (1)

[Scope of utility model registration request] A refueling vehicle that appropriately refuels an object to be refueled using a refueling nozzle with fuel stored in a tank mounted on a vehicle body, a master cylinder that transmits operating pressure to a wheel cylinder of the refueling vehicle;・A brake lock switch that controls the activation and release of the master cylinder is installed in the brake piping that includes the supply tank that is the pressure source for the cylinder, and this brake lock switch is formed by a 3-port 2-position switching valve. An operating pipe line connected to the primary side port of the lock switch is branched from the brake pipe, and a three-way valve and a switching valve for discharging operating pressure in an emergency are disposed in this operating pipe line, and A refueling system, wherein a valve is selectively switched in response to a signal generated when the refueling nozzle is retracted or not retracted, so that the brakes of the refueling vehicle can be locked when the refueling nozzle is not retracted. Car brake interlock device.