JPS5882898A - Method of controlling position of rise and fall of hanging type hose - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the vertical position of a hanging hose in a gas service station having a hanging hose.

For example, as shown in FIG.

In the refueling device, a hose storage B such as a hose reel 3 is stored in a hose storage box 2 attached to a canopy 1.
On the other hand, oil in an oil storage tank (not shown) is pumped up by a pump 4 and measured by a flowmeter 5, and then from the vibro to a hose 7 stored in a hose storage device, that is, a hose reel 3. and into the end of hose 7
The oil flows into a refueling nozzle 8 attached to the other end. A lifting motor 9 is used to lower the hose 7, and this lifting motor 9 is controlled by an outdoor switch SW1 and a hand switch SW2. 10 in the figure is a display meter.

In such a refueling device, the refueling nozzle 8 is located at a top/lower holding position 1U shown by a solid line in FIG. 1, and at an intermediate standby position 12 and a refueling position shown by a dotted line. It is now possible to stop at three locations. In other words, when the store is closed or when a large automated store enters, the hose is raised to the ceiling standby position H1, and when there are customers, the hose is moved to the intermediate standby position H2.
During refueling work, the refueling level is set to IH3. According to the prior art, at the time of installation, these positions were adjusted by adjusting a cam that rotates in conjunction with the hose reel, thereby changing the timing of opening and closing of a cam switch for controlling the rotor, which is opened and closed by the cam.

In the prior art, this position adjustment work is done by adjusting the position of a cam installed in the hose storage device 2 installed in the canopy 1 at a high place, which is extremely difficult to do and takes a long time. Even when the hose 7 stretches due to use and falls below a predetermined position, there is a drawback that only a specialized worker can adjust the cam position.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a control device for the lifting and lowering position of a hanging hose, which allows the stopping position of the hose to be arbitrarily and easily adjusted.

According to the present invention, a voltage signal is emitted from a potentiometer in conjunction with a hose reel, the voltage signal is detected and discriminated by a discrimination circuit, and the vertical position of the hose is controlled by the signal from the discrimination circuit. . Therefore, according to the present invention, the stop position of the hose can be controlled by providing the discrimination circuit in an accessible location on the ground, such as in an office, and adjusting the discrimination circuit.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, a potentiometer 20 interlocked with the hose reel 3 is of a known variable resistance type, and is connected to a discrimination circuit 21, which will be described later, via a line L1. This discrimination circuit 21, which will be described in detail in FIG. 3, sends a signal to the motor control circuit 22 of the lifting motor 9 in response to signals from the potentiometer 20, outdoor switch SW1, and hand switch SW2 to control the lifting position of the hose. It looks like this. Further, a signal from the discrimination circuit 21 is sent to a pump control circuit 23 to control the drive motor 24 of the pump 4.

On the other hand, the flow meter 5 is provided with a pulse transmitter 25, and a flow pulse signal from the pulse transmitter 25 is sent to a counting circuit 26, and the flow rate is displayed on the display if10. Further, the discrimination circuit 21 sends a reset signal and the like to the counting circuit 26.

Next, an embodiment of the present invention will be described with reference to FIG.

It is assumed that the hose 7 is now in the ceiling standby position 111.

The potentiometer 2o is linked to the hose reel as described above, and in the illustrated embodiment, the higher the hose, the higher the voltage signal from the potentiometer 20 through the line L1 to the comparators C1, C2, and C3. do. Variable resistors R1, R2, and R3 are for position adjustment, respectively, and are used to adjust the ceiling standby position IH1, intermediate standby position IH12, and refueling position H3. ) is installed within. Comparators C1, C2 and C3 compare the signal from potentiometer 20 with the signals from variable resistors R1, R2 and R3, respectively, and produce a high signal when the signal level from the variable resistors is low. Therefore, when in the ceiling standby position, comparators C1 and C
2, a high signal is generated from C3. When a high signal is generated on lines 12 to L9, a control signal corresponding to the signal is sent from the discrimination circuit to each control circuit.

First, when the outdoor switch SW1 is pressed, the signal is transmitted to the AND circuit A1, and a high signal (hose lowering signal) is generated from the AND circuit A1 to the line L3, and the signal is transmitted to the motor control line 22. , the hose reel motor 9 rotates forward in response to a signal from the circuit.

When the hose is fed out and reaches the intermediate special position H2, the signal level from the variable resistor R2 becomes higher than the signal level from the potentiometer 20, so that no signal is output from the comparator C2. Then inverter I2
(Since C4 is reversed, a high signal (hose lowering stop signal) is generated on line [5, and this signal is transmitted to the motor control circuit 22. Therefore, the motor 9 is stopped.

Next, the operator presses the hand switch SW2. Then, the AND circuit A4 receives the signal from the hand switch SW2 and the signal from the comparator C3 (at the intermediate standby position H2, the signal level from the potentiometer 2o is higher than the signal level from the variable resistor R3, so a high signal from the comparator C3 is sent. is occurring), so a high signal (hose down signal) is generated on line 17, which is transmitted to motor control circuit 22. Therefore, the motor 9 rotates in the normal direction again.

When the refueling position H3 is reached, the potentiometer 2
Since the signal level from 0 becomes lower than the signal level from variable resistor R3, there is no signal from comparator C3, and a high signal is generated from inverter 3. This signal from the inverter I3 generates a high signal (hose lowering stop signal) on the line L9, the motor 9 stops, a reset signal is sent to the counting circuit 26, the display meter 10 is reset, and the pump control circuit 23 A start signal is transmitted to the pump motor 24, and the pump motor 24 is rotated by the signal from the pump control circuit 23.

The refueling operation is carried out in this manner, and the refueling signal measured by the mmmeter 5 and emitted from the pulse transmitter 25 is displayed on the counting circuit 26 on the count indicator 10. Then, when the refueling work is completed, the operator switches the hand switch SW2.
Press. Then, the signal from the hand switch SW2 is applied to the AND^ path A5, and since the signal from the inverter 3 is also output, a high signal (hose lowering signal) is generated on the line L8. The ground signal generated in this line 18 causes the motor 9 to rotate in reverse to wind up the hose, and is also transmitted to the pump control circuit 23 to stop the pump motor 24.

When the hose 7 is hoisted up to the intermediate standby position MI-12, the signal level from the body valve meter 20 is higher than the signal level from the variable resistor R2, so the comparator C2 produces a high signal. This signal is sent to line L6 as a rising stop signal, and motor 9 is stopped.

When performing refueling work again, press the hand switch S as described above.
Just press W2. In this way, each time the hand switch SW2 is pressed, the Bose moves up and down between the intermediate standby position 1''2 and the refueling position H3.

Now, when the store is closed or a large vehicle arrives, the hose must be hoisted from the intermediate standby position 1-12 to the ceiling standby position H1. At this time, the operator presses the outdoor switch SWI. At this time, since a high signal is output from the comparator C2, the AND circuit A2 is output by the signal from the outdoor switch sw1.
- produces a high signal. At the intermediate standby position H2, a high signal is not generated from the converter C1, so a high signal is generated from the inverter 11. Therefore, the AND circuit A3 generates a high signal (hose rise signal) on the line L4. When a soil signal is generated at L4, the motor 9 reverses and winds up the hose.

When the ceiling standby position H1 is reached, the comparator C1
A signal (hose rise stop signal) is transmitted to the line L2, and the motor 9 is stopped.

Note that the signals generated on each line 2 to L9 are accepted as each signal when the signal rises, that is, when it becomes high.

As explained above, according to the present invention, a potentiometer interlocked with a hose reel is used to
Generates a voltage signal related to the voltage and determines the stop position by determining the change in voltage with a discrimination circuit, so the discrimination circuit can be installed in an easily accessible place such as in an office, and the stop position can be controlled from the ground. . Furthermore, the present invention requires only one signal line from the potentiometer, and wiring is simple.

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[Brief explanation of the drawing]

FIG. 1 is a front view of a gas station implementing the present invention, FIG. 2 is an explanatory diagram of a control circuit implementing the present invention, and FIG. 3 is a circuit diagram showing an example of a discrimination circuit implementing the present invention. 3...Hose reel 7...Hose 8...
Nozzle 20... Potentiometer R1, R
2, R3...Position @Variable resistor for vibration adjustment 21...Discrimination circuit H1...Ceiling standby position @R2...Intermediate standby position 13...Refueling position 10-

Claims (1)

[Claims] In a method for controlling the vertical position of a hose in a gas service station having a hanging hose, a voltage signal related to the hanging position of the hose is generated by a potentiometer that is linked to the rotation of a hose reel, and a circuit for determining changes in the voltage is provided. A method for controlling the lifting and lowering position of a hanging hose, characterized in that the stop position is controlled by determining the position of the hanging hose.