JPS5834359B2 - Suspended oil supply system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suspended refueling device, which detects an obstacle such as a vehicle below when a refueling nozzle descends, and automatically stops the lowering of the refueling nozzle to prevent the obstruction from occurring. It is an object of the present invention to provide a suspended refueling device configured to prevent collision with objects.

Generally, in refueling systems where the refueling nozzle descends from the ceiling etc. during refueling, the descending refueling nozzle is configured to automatically stop at a height that does not collide with the roof of the passenger car, taking into account the vehicle height of a general passenger car. It is.

This stop position is set in relation to the feeding length of the refueling hose, and it is difficult to arbitrarily change the stop position.

For this reason, if a high-vehicle truck, etc. is stopped below the refueling nozzle, it is necessary for the worker to manually guide the descending refueling nozzle to prevent it from colliding with the truck, etc. becomes.

However, if these precautions are not taken, the refueling nozzle may directly collide with the roof of the truck, resulting in an accident that may damage the refueling nozzle and the truck body.

The present invention eliminates the above-mentioned drawbacks, and one embodiment thereof will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a suspended oil supply system according to the present invention, and FIG. 2 shows an example of an electric circuit that can be applied to the oil supply system shown in FIG.
A circuit diagram of an example is shown.

In the suspended type refueling device 1 shown in FIG. 1, the refueling hose 2 is normally wound and housed in a delivery unit 4 provided on the lower surface of the ceiling 3, and the refueling nozzle 5 is in a raised position.

At this time, in FIG. 2, the cam switch 6 that regulates the up position is open, and the non-contact detection switch 8, which is connected in series with the down switch 7 and is a main part of the present invention, is closed. There is.

The detection switch 8 is provided below the fuel nozzle 5, as shown in FIG. 1, and opens when the fuel supply nozzle 5 approaches the vehicle body or the like at a predetermined distance.

Next, the lowering operation and operation of the refueling nozzle that precedes the refueling operation will be described.

First, a vehicle 9 such as a truck to be refueled is placed at the refueling nozzle 5.
The operation when stopped below is explained.

When lowering the refueling nozzle 5, the down switch 7 is pressed and operated.

By closing switch 7, L'-RLl operates, and relay contact rl -4? rl-2j rl-a is switched and, in particular, relay RLI is self-maintained in the operative mode by closing relay contact r1-1.

Further, by closing the relay contact r1-2, the electromagnet Mg1 is supplied with the power supply voltage E and operates, and the switch 10 is closed.

Therefore, the power supply circuit of the motor 11 is closed, and the motor 1
1 rotates in one direction, the refueling hose 2 is sent out from the delivery unit 4, and the refueling nozzle 5 descends.

Note that when the refueling nozzle 5 is lowered, the relay contact r1
-3 is closed, and cam switch 6 is closed.

When the refueling nozzle 5 descends and approaches a position that is a predetermined height H away from the roof or the like of a high-vehicle vehicle 9 as shown in FIG. 9 is detected, and the detection switch 8 is opened.

When the detection switch 8 is opened, the relay RL1 is released from the self-holding mode and becomes inactive, and the relay contact rl-
1jr1-2 opens and relay contact r1-3 closes.

When the relay contact r1-2 is opened, the electromagnet Mg1 is demagnetized and the switch 10 is opened.

Therefore, the motor 11 stops, and the downward movement of the refueling nozzle 5 automatically stops at a position separated from the automobile 9.

In this case, after moving the car 9 to a position away from below the fuel nozzle 5 and closing the detection switch 8, press the down switch 7 again to move the fuel nozzle 5 to the cam position as shown below. The switch 12 is opened and lowered to the position where it stops.

Note that the height H of the refueling nozzle 5 from the vehicle 9 when the non-contact detection switch 8 detects the vehicle 9 is determined by taking into account excessive lowering time due to inertia of the refueling nozzle 5, etc. 5 is set at a height that will not cause it to collide with the car 9.

Further, the non-contact switch 8 may be configured, for example, by a combination of a magnet and a reed switch, or may be configured by a capacitive non-contact switch.

Furthermore, if there is no obstacle such as a car below the refueling nozzle 5, the cam switch 12 opens in connection with the feeding of the refueling hose 2 when the refueling nozzle 5 descends to a predetermined height from the ground. .

When the cam switch 12 opens, similar to the above case,
]Upper Ray RL1. The electromagnet Mg1 is put into a non-operating state, the switch 10 is opened, and the motor 11 is stopped.

As a result, the refueling nozzle 5 automatically stops at a predetermined height position, and the operator performs the refueling operation by lowering the refueling nozzle 5 further.

Next, when refueling is completed and the refueling nozzle 5 is to be raised, the up switch 13 is pressed.

At this time, the cam switch 6 is closed, so by pressing the up switch 13, the relay RL2 is activated by the power supply voltage E, and the relay contacts r2-1 j r2-2
is closed, and relay contact r2-3 is opened.

Relay RL2 is self-maintained in the operating state by closing relay contact r2-1.

In addition, by closing relay contact r2-2, electromagnet Mg2
is excited, and the switch 14 is closed.

As a result, the motor 11 is connected to the power source with a polarity opposite to that at the time of descent, and the motor 11 starts rotating in the direction opposite to that at the time of descent.

By driving the motor 11 to rotate in the opposite direction, the refueling hose 2 is sequentially wound and stored in the delivery unit 4, and the refueling nozzle 5
rises.

When the refueling hose 5 is wound and stored in the unit 4 by a predetermined length and the refueling nozzle 5 rises to a predetermined height position, the cam switch 6 is opened, the self-holding of the relay RL2 is released, and the electromagnet Mg2 is demagnetized. The switch 14 is opened and the motor 11 is stopped.

By stopping the motor 11, the refueling nozzle 5 stops rising, and the refueling nozzle 5 returns to its original raised position.

As described above, the suspended refueling device of the present invention is configured to detect an obstacle such as a vehicle below the refueling nozzle and stop the lowering of the refueling nozzle when it approaches to a predetermined distance. Therefore, even if the height of the obstacle is different, the refueling nozzle will automatically stop at a height that will not collide with the obstacle, and if the refueling nozzle collides with an obstacle such as a vehicle, the refueling nozzle and the vehicle will be stopped automatically. The feature of the hat is that it can prevent accidents that could damage the equipment.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a fueling station to which an embodiment of the suspended fuel supply system according to the present invention is applied, and FIG. 2 is a circuit diagram of one embodiment of an electric circuit that cooperates with the fuel supply system shown in FIG. It is a diagram. 1... Suspended oil supply device, 4... Delivery unit, 5... Oil supply nozzle, 6, 12...
...Cam switch, 7...Down switch, 8...Contactless detection switch, 9...
Driving wheel, 11...Motor, 13...Up switch.

Claims (1)

[Claims] 1 A fuel supply station equipped with a hose elevating mechanism installed at a high location, and a refueling hose that is suspended from the hose elevating mechanism and has a refueling nozzle at its tip, and drives the hose elevating mechanism to raise and lower the refueling nozzle. In the suspended refueling system, the refueling nozzle or the refueling hose near the refueling nozzle is provided with a detection means for detecting a predetermined distance from an obstacle below and outputting a signal. The suspension type refueling device further comprises a lifting control circuit for stopping the lowering drive of the hose lifting mechanism based on a detection signal from the lowering time detection means.