JPH0139959B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a suspended type system in which a hose having a refueling nozzle at the tip is raised and lowered by a hose elevator installed at a high place at a refueling station, and a vehicle is refueled using the refueling nozzle. Regarding a refueling device.

Conventionally, as this type of refueling device, a hose elevator operated by a motor is provided at a high location of the refueling station such as a ceiling, a beam, a canopy, etc., and the hose elevator is provided with a hose having a refueling nozzle at its tip, and one end is attached to the hose elevator. A pump and a flow meter are installed in the middle of the pipe connected to the tank, and the other end is connected to the tank, and a display meter is installed at a position where the customer can easily see the amount of oil measured by the flow meter. A suspended type lubrication system in which a switch box is provided in the middle of the hose near the nozzle, and three switches are attached to the switch box, consisting of a switch for lowering the motor, a switch for raising the motor, and a switch for resetting the display meter. The device is known. Then, by operating the lower switch, the motor rotates downward so that, for example, the refueling nozzle at the standby position 1.8 m above the site is lowered to the refueling position where the vehicle should be refueled, and the lower switch is activated. By operating the refueling position, the motor rotates upward so that the refueling nozzle in the refueling position rises to the standby position, and by operating the reset operation switch, the refueling nozzle is lowered to the refueling position and the previous refueling is resumed. It resets the quantity display value to zero and operates to enable continuous refueling.

However, in the above-mentioned suspended refueling system,
Although the switchbox must have an explosion-proof structure due to the handling of hazardous materials such as gasoline, the switchbox has three switches, which has the disadvantage of increasing its external dimensions. It was hot. In particular, since a switch box is provided near the refueling nozzle, the refueling nozzle not only has poor operability, but also has the disadvantage that the switch box collides with the vehicle and peels off the vehicle's paint. In addition, since the switch box has three switches adjacent to each other, it is possible to press the wrong switch by mistake, and when the reset operation switch should have been operated, instead of operating the raising switch, it may suddenly turn off. The drawback was that the refueling nozzle rose, which was extremely dangerous. Furthermore, since three switches are required, it also has the disadvantage of being expensive.

Therefore, in order to improve the drawbacks of the prior art described above, a single switch for lifting and lowering the hose is provided in the middle of the refueling nozzle or hose, and the motor for lifting and lowering the hose elevator is raised and lowered according to the operation mode of the switch. It is being considered that a configuration in which a lift control circuit for controlling the drive is provided will allow the switchbox to be made smaller in size and also allow the hose to be lifted and lowered with a single switch.

However, in such a suspended refueling device, when the switch is operated to lower the refueling nozzle in the standby position to the refueling position, the refueling nozzle may be in the middle of being lowered and the refueling nozzle may be in the refueling position. If the switch is operated by mistake even after descending, for example, the pump will be automatically activated when the refueling nozzle reaches the refueling position, and the operator will have to press the switch when the refueling nozzle has descended from the standby position. By the time you release your hand and try to pick it up, the pump will already be in the operating state. Further, the refueling nozzle that has been lowered to the refueling position may suddenly move upward.

The present invention aims to reduce the size of the switch box in a suspended type refueling system, eliminates the above-mentioned operation, provides reliability for safety in refueling work, and prevents malfunctions during hose lifting work. The purpose is to provide equipment.

To this end, the suspended refueling system of the present application, as a first invention, is provided with a hose elevator operated by a lifting motor at a high location of the refueling station, and the hose elevator is provided with a hose having a refueling nozzle at its tip. , a suspension type refueling device comprising a pump driven by a pump motor and a flow meter disposed in the middle of a piping whose one end is connected to the hose elevator and whose other end is connected to a tank; the hose elevator has the refueling nozzle; A position detector is provided to detect when the refueling nozzle or hose has been lowered to a predetermined refueling position or raised to a standby position, and a single switch for raising and lowering the hose is provided in the middle of the refueling nozzle or hose, and the operating output of the switch is provided. and the detection output of the position detector is supplied, and when the position detector is in the state of detecting the standby position, the operation of the switch drives the lifting motor downward and the position detector moves to the refueling position. When detected, the lowering drive of the lifting motor is stopped, and when the position detector is detecting the refueling position, the lifting motor is driven upward by operating the switch, and the position detector An elevating control circuit is provided which stops the upward drive of the elevating motor when the standby position is detected, and is supplied with the operation output of the switch and the detection output of the position detector, and lowers the classmate nozzle from the standby position to the refueling position. a switch lowering operation completion confirmation circuit that outputs a lowering operation completion signal based on the de-energization of the operation output of the switch and the detection of the refueling position of the position detector when the switch is operated in the standby position in order to A pump control circuit is provided, and a lowering operation end signal is supplied from the switch lowering operation end confirmation circuit, and the pump motor is started by inputting the lowering operation end signal.

In addition, the suspended refueling device of the present application, as its second invention, is provided with a hose elevator operated by a lifting motor at a high location of the refueling station, and the hose elevator is provided with a hose having a refueling nozzle at its tip, In a suspended refueling device, a pump driven by a pump motor and a flow meter are provided in the middle of a pipe whose one end is connected to the hose elevator and the other end is connected to a tank, and the hose elevator is connected to the refueling nozzle. A position detector is provided to detect when the fuel has descended to a predetermined refueling position or has risen to a standby position,
A single switch for lifting and lowering the hose is provided in the middle of the refueling nozzle or hose, and the operation output of the switch and the detection output of the position detector are supplied,
When the position detector detects the standby position, the operation of the switch drives the lifting motor downward, and when the position detector detects the refueling position, stops the driving of the lifting motor downward. and when the position detector is detecting the refueling position, the lifting motor is driven upward by operating the switch, and when the position detector detects the standby position, the lifting motor is raised. A lift control circuit for stopping the drive is provided, and the operation output of the switch and the detection output of the position detector are supplied, and the switch is operated at the standby position in order to lower the refueling nozzle from the standby position to the refueling position. In some cases, a switch lowering operation completion confirmation circuit is provided that outputs a lowering operation completion signal based on de-energization of the operation output of the switch and detection of the refueling position of the position detector, and the lowering operation is confirmed from the switch lowering operation completion confirmation circuit. When the end signal is supplied and the lowering operation end signal is not input, prohibiting the operation output from being outputted from the lifting control circuit to the lifting motor as a lifting drive signal based on the operation of the switch at the refueling position. It is constructed by providing a switch raising operation disabling circuit.

According to the suspended refueling device of the present invention, not only can the hose be raised and lowered with a single switch, but when the switch is operated to lower the refueling nozzle from the standby position to the refueling position, the refueling nozzle is lowered. Even if you accidentally continue to operate the switch while the refueling nozzle is in the refueling position or after the refueling nozzle has descended to the refueling position, the pump will only start after the switch has finished lowering and the refueling nozzle has descended to the refueling position. This enables the refueling nozzle to be activated and ready for refueling, and prevents the refueling nozzle that has been lowered to the refueling position from suddenly operating upward.

The present invention will be described below along with embodiments shown in the drawings.

In FIG. 1, a building 2 including an office and the like is provided on a gas station site 1, and an elevated area 3 consisting of a ceiling, beams, canopy, etc. is formed above the building 2. A pipe 4 is provided along the building 2, one end of the pipe 4 is connected to a hose elevator to be described later, and the other end opens into a tank 5 installed underground in the site 1. A pump 7 driven by a pump motor 6 and a flow meter 8 for measuring the amount of oil supplied are provided in the middle of the pipe 4.
A flow rate transmitter 9 is attached to transmit a flow rate signal proportional to the measured flow rate.

Further, a hose elevator 10 is installed at the high place 3, and the hose elevator 10 is composed of a rotatably provided hose reel 11 and a hose elevator motor 12 that rotates the hose reel 11 in forward and reverse directions. One end of the piping 4 is connected to the hose reel 11, and a hose 13 is wound thereon, and a refueling nozzle 14 is attached to the tip of the hose 13. On the other hand, a switch box 15 for detecting the nozzle position is provided in the hose elevator 10, and a motor 1 is installed in the switch box 15.
2 or depending on the rotation of the hose reel 11, the refueling nozzle moves to the standby position A, approximately 1.8 m above the ground as shown in the diagram.
Upper end switch 1 that detects when the
6. Built-in lower end switch 17 that detects when the vehicle is at refueling position B and closes it (see FIG. 2 for the switches 16 and 17);
It is connected to a control panel 18 provided in an office or the like of the building 2. Note that the control panel 18 is not limited to an office or the like, and may be placed inside a display meter 19, which will be described later.

Reference numeral 19 denotes a display meter installed at a high place 3 in the building 2 where customers can easily see it, and the display meter 19 may be a reversing plate display, a light emitting diode display, or the like. And the display 19 is the control panel 18
The flow rate transmitter 9 is connected to the flow rate transmitter 9 via a counting circuit and a drive circuit (not shown) built in the flow rate transmitter 9.
The system is configured to display the amount of refueling proportional to the flow rate signal from.

Further, the hose 13 may be placed near the refueling nozzle 14 in the middle of the hose 13, or between the hose 13 and the refueling nozzle 14.
A switch box 20 is installed between the switch box 20 and the switch box 20, and a single switch 21 for raising and lowering the hose 13 and resetting the display meter 19 is built into the switch box 20. It is constructed so that it can be opened and closed directly by hand or manually. And switch 21
is connected to the control panel 18 via a signal line 23 wound around the hose 13.

Next, in FIG. 2, reference numeral 24 indicates a control circuit provided in the control panel 18, and the input side of the control circuit 24 is connected to each switch 1 in the switch box 15.
6, 17 and switch box 2
The output side thereof is connected to the pump motor 6, the lifting motor 12 via the rotation switching circuit 25, and the display meter 19, respectively. The control circuit 24 includes a pump control circuit that starts and stops the pump motor 6 by opening and closing the switches 16, 17, and 21, and an elevator control circuit that rotates the elevator motor 12 downward and upward. A reset circuit for resetting the displayed value of the display meter 19 to zero detects that the lowering operation of the switch 21 is completed and is opened, and that the refueling nozzle 14 has lowered to the refueling position B and the switch 17 is closed. A switch lowering operation completion confirmation circuit that drives the pump motor 6, refueling nozzle 1
a switch operation disabling circuit that disables new operation of the switch 21 until a predetermined period of time has elapsed after the lower end switch 17 is closed after the lower end switch 17 has been lowered to the refueling position B;
It is composed of a switch raising operation disabling circuit which invalidates the raising operation of the refueling nozzle 14 even if the switch 21 is kept pressed unless a signal from the switch lowering operation completion confirmation circuit is inputted.

That is, the control circuit 24 includes AND circuits 26, 27,
28, 29, 30, and monostable multivibrators 31, 32, 33, 34, 35, 36 (hereinafter referred to as MM
circuits 31 to 36) and flip-flop circuits 37, 38, 39, 40, 41, 42 (hereinafter referred to as
FF circuits 37 to 42), an exclusive OR circuit 43 that outputs an output when only one input is received, a delay circuit 44 that outputs an output after a predetermined delay time with respect to the input, and a switch 21 that continuously A timer 45 that outputs a limited time output after a predetermined set time by keeping it closed, a counter 46 that outputs an output when two pulses are input, and a delay circuit that outputs a signal to reset the counter 44 after a predetermined delay time. 47, and an OR circuit 48 for outputting a zero reset signal for the display meter 19.

The upper end switch 16 is an AND circuit 26,
It is connected to the MM circuit 33, and the lower end switch 17 is
The switch 21 is connected to the MM circuit 31, and the set terminal 38 of the AND circuits 26, 27 and the FF circuit 38.
A. Connected to the input side of the exclusive OR circuit 43. The MM circuit 31 is connected to reset terminals 37B and 42B of the FF circuits 37 and 42, the MM circuit 32 provided on the output side of the AND circuit 26 is connected to the set terminal 41A of the FF circuit 41, and the MM circuit 33 is a delay circuit. 44 to the set terminal 37A of the FF circuit 37, and also to the AND circuit 3.
The output terminal 37C of the FF circuit 37 is connected to the AND circuit 27. The output side of the AND circuit 27 is the AND circuit 2.
9, and is also connected to the AND circuit 28 and the input terminal 46A of the counter 46 via the MM circuit 34, and the output terminal 46C of the counter 46 is
Connected to the OR circuit 48 via the MM circuit 35,
The output side of the MM circuit 35 is connected to a reset terminal 46B of a counter 46 via a delay circuit 47. On the other hand, the output terminal 38C of the FF circuit 38 is connected to the exclusive OR circuit 43, the output side thereof is connected to the AND circuit 30, and the output side of the AND circuit 30 is connected to the set terminals 39A, 4 of the FF circuits 39, 40.
Connected to 0A. The output terminal 39C of the FF circuit 39 is connected to the AND circuit 28, and its output side is connected to the AND circuit 29 and FF via a timer 45.
It is connected to the reset terminal 39B of the circuit 39, and the output side of the AND circuit 29 is connected to the set terminal 42A of the FF circuit 42. moreover,
The output terminal 40C of the FF circuit 40 is connected to the pump motor 6 via a signal line 49.
The motor 6 is started and stopped by a pump drive signal transmitted from 0C, and its reset output terminal 40D is connected to the reset terminal 38B of the FF circuit 38. The output terminal 41C of the FF circuit 41 is connected to the rotation switching circuit 2 via the signal line 50.
5 is connected to the input terminal 25A of the output terminal 41.
The motor 12 is activated by the descending rotation signal output from C.
Rotate downward. Output terminal 4 of FF circuit 42
2C is connected to the reset terminal 40B of the FF circuit 40 via the MM circuit 36, and is also connected to the input terminal 25B of the rotation switching circuit 25 via the signal line 51, and the motor is controlled by the rising rotation signal output from the output terminal 42C. 12 is rotated upward. Furthermore, the output side of the OR circuit 48 is connected to the display meter 19 via a signal line 52, and the display value in the previous refueling operation displayed on the display meter 19 is determined by the reset signal output from the OR circuit 48. Reset to zero.

In the control circuit 24 connected as described above, the pump control circuit includes the FF circuit 40, the lift control circuit includes the FF circuits 41, 42, AND circuits 27, 29, and a timer 45, and the reset The circuit is OR circuit 48, counter 4
6. Constructed including a delay circuit 47, the switch lowering operation completion confirmation circuit includes an FF circuit 38, an exclusive OR circuit 43, and an AND circuit 30, and the switch operation invalidation circuit includes a delay circuit 44, an FF circuit 3
7, and the switch raising operation disabling circuit further includes an FF circuit 39 and an AND circuit 28.

The suspension type refueling system of the present invention is constructed as described above, and its operation will now be explained with reference to the diagram shown in FIG. 3.

It is now assumed that the refueling nozzle 14 is at the standby position A as shown in FIG. 1, and the upper end switch 16 is closed.

First, the lowering operation of lowering the refueling nozzle 14 from the above state to the refueling position B will be explained with reference to the diagram in FIG. 3A. To lower the refueling nozzle 14, the string 22 is pulled once and the switch 21 is closed once for a short period of time, as shown in FIG. 3A. Since the signals from the switches 16 and 21 are input to the AND circuit 26 by closing the switch 21, the coincidence signal output from the AND circuit 26 is
It is input to the set terminal 41A of the FF circuit 41 via the MM circuit 32 to set it in the set state, and a descending rotation signal is output from its output terminal 41C to the input terminal 25A of the rotation switching circuit 25, causing the lifting motor 12 to rotate downward. . As a result, the hose reel 11
rotates to rewind the hose 13 and refuel the refueling nozzle 1.
Lower 4. The refueling nozzle 14 is at refueling position B
When this happens, the lower end switch 17 detects this and closes it. By closing the switch 17, the MM circuit 3
3 is input to the reset terminal 41B of the FF circuit 41,
Output terminal 41 with FF circuit 41 in reset state
Stop outputting the descending rotation signal from C. As a result, the motor 12 stops rotating and the refueling nozzle 14
The lowering operation of is completed. On the other hand, the MM circuit 33
The output from the OR circuit 48 is inputted to the OR circuit 48, and by outputting a reset signal from the OR circuit 48, the display meter 19 is reset to zero via the signal line 52. Further, the output from the MM circuit 33 is input to a delay circuit 44, and the delay circuit 44 connects the set terminal 3 of the FF circuit 37 after a preset delay time.
7A to set the FF circuit 37,
The signal is output from the output terminal 37C to the AND circuit 27, and the gate is opened. That is, since the delay circuit 44 and the FF circuit 37 constitute a switch operation disabling circuit, no matter how many times the switch 21 is pressed within the delay time of the delay circuit 44, the switch 21 will not be pressed again. Even if the switch operation is disabled, the switch operation will be invalidated.

Furthermore, when the switch 21 is closed for a short time as described above, the set terminal 38A of the FF circuit 38 is closed.
is input to set the FF circuit 38,
Since the output terminal 38C of the switch 21 is output to the exclusive OR circuit 43, and the output of the switch 21 is directly input to the exclusive OR circuit 43, the exclusive OR circuit 43 is output while the switch 21 is closed. There is no output from the circuit 43. However, Switch 21
When is opened, an output is generated from the exclusive OR circuit 43, so when the refueling nozzle 14 is at the refueling position B and the lower end switch 17 is closed, the AND circuit 30 outputs a switch lowering operation end signal. . That is, FF circuit 38, exclusive OR circuit 4
3. Since the AND circuit 30 constitutes the switch lowering operation completion confirmation circuit, the lower end switch 1
Unless the switch 21 is open when the lower end switch 17 is closed, the AND circuit 30 will not output the lowering operation end signal, and this is a malfunction caused by the switch 21 being closed when the lower end switch 17 is closed. This prevents, for example, a malfunction in which the pump motor 6 is driven while the string 22 is being pulled. Thus, the descending operation end signal from the AND circuit 30 is
The set state is set by inputting the signal to the set terminal 40A of the FF circuit 40, and a pump drive signal is output from the output terminal 40C to drive the pump drive motor 6.
Start up and make it ready for refueling. As a result, the operator can be made aware that refueling is not possible unless the switch 21 is opened, and reliability can be given to the operation. At the same time, the output from the AND circuit 30 is input to the set terminal 39A of the FF circuit 39 to set it in the set state, and is output from the output terminal 39C to the AND circuit 28 to open the gate of the AND circuit 28. Here, the FF circuit 39, the AND circuit 28
etc. constitutes a switch raising operation invalidation circuit, so even if the switch 21 is kept pressed, no output will be sent to the timer 45 unless the gate circuit 28 is opened.

As described above, the refueling device becomes ready for refueling, so when the refueling nozzle 14 is inserted into the heating tank of the vehicle and the valve is opened, the oil in the tank 5 is transferred to the piping 4, the pump 7, the flow meter 8, and the hose 13. is refueled through
The flow rate measured by the flow meter 8 is displayed on a display meter 19 every moment via a flow rate transmitter 9. One refueling operation is completed by closing the refueling nozzle when the desired amount of refueling is reached.

Next, after one refueling operation is completed as described above, the display value of the display meter 19 is reset to zero while the refueling nozzle 14 is lowered to the refueling position B, and continuous refueling is started to refuel the next vehicle. The work will be explained with reference to Figure 3B. In order to carry out continuous refueling as described above, the cord 22 is pulled while the refueling nozzle 14 remains in the refueling position B, and the switch 21 is closed twice in succession for a short time each time. In this state, the lower end switch 17 is closed, and
As mentioned above, since the gate of the AND circuit 27 is opened by the output from the FF circuit 37, the output from the MM circuit 34 is inputted to the counter 46 by the first closing operation of the switch 21, and the output from the MM circuit 34 is inputted to the counter 46. Advance the count. Similarly, by the second closing operation of the switch 21, the counter 46 is further incremented by one count, a total of two counts. As a result, an output is sent from the counter 46 to the MM circuit 35, and a reset signal is output from the OR circuit 48 to the display meter 19, thereby resetting the previous oil supply amount to zero. On the other hand, the output from the MM circuit 35 is input to the reset terminal 46B of the counter 46 after a predetermined delay time via the delay circuit 47.
Reset.

By the above operation, the display meter 19 is reset to zero, and since the pump motor 6 continues to rotate, the pump 7 is driven, and all that is required is to insert the fuel nozzle 14 into the fuel tank of the next vehicle and open the valve. Continuous refueling is possible.

Furthermore, when the continuous refueling work is completed, the refueling nozzle 1
4 will be explained with reference to FIG. 3C.
In order to carry out the above-mentioned raising operation, the switch 21 is continuously closed for a long period of time equal to or longer than the set time t of the timer 38 of ₁ second. That is, as mentioned above, the output from the FF circuit 37 causes the AND circuit 2 to
Since the gate of 7 is open and the gate of AND circuit 28 is also opened by the output from FF circuit 39, by closing switch 21, AND circuit 27, MM circuit 34, and AND circuit 2 are opened.
The timer 45 is operated via the timer 8, and the timer 38 outputs a time-limited output after a set time t of ₁ second, and this time-limited output is output to the AND circuit 29, which stops the time-limited output after t of ₂ seconds. On the other hand, since the closing signal of the switch 21 is input to the AND circuit 29 via the AND circuit 27, while the time limit output of the timer 45 is input to the AND circuit 29 for (t ₂ - t ₁ ) seconds, If the switch 21 is closed for more than t ₁ second,
The AND circuit 29 connects the timer 45 and switch 2.
1 and each signal is matched, and this matching signal is
The signal is inputted to the set terminal 42A of the FF circuit 42 to set it in the set state. As a result, an increasing rotation signal is input from the output terminal 42C of the FF circuit 42 to the MM circuit 36 and the input terminal 25B of the rotation switching circuit 25. First, when an upward rotation signal is input to the input terminal 25B, the lifting motor 12 rotates upward.
The motor 12 rotates the hose reel 11 in the winding direction, and the hose 13 is wound up. When the refueling nozzle 14 reaches the standby position A, the upper end switch 16 closes and the output from the MM circuit 31 is
It is input to the reset terminal 42B of the FF circuit 42,
The output of the rising rotation signal from the output terminal 42C is stopped, and the rotation of the lifting motor 12 is stopped. Further, by inputting the rising rotation signal to the MM circuit 36, the reset terminal 40B of the FF circuit 40 is reset.
, the FF circuit 40 in the set state returns to the reset state, stops outputting the pump drive signal from the output terminal 40C, and stops driving the pump motor 6. Further, when the FF circuit 40 is reset, its reset output terminal 40 is reset.
A reset signal is output from D to the reset terminal 38B of the FF circuit 38, and the FF circuit 38 is brought into a reset state. Furthermore, as mentioned above, the time-limited output from the timer 45 is sent to the reset terminal 39 of the FF circuit 39.
By being input to B, the FF circuit 39 is set to a reset state, and when the upper end switch 16 is closed, the FF circuit 37 is set to a reset state via the MM circuit 31.

As a result of the above, the refueling nozzle 14 returns to the standby position A, the lifting motor 12 stops, and the pump motor 6 also stops to return to the state shown in FIG. 1, preparing for the next refueling operation.

By the way, in the rising operation described above, in order for the timer 45 to start the time-limiting operation, the AND circuit 2
Gates 7 and 28 must be open. However, since the AND circuit 27 does not open the gate until after the predetermined delay time set in the delay circuit 44 that constitutes the switch operation invalidation circuit, the gate is not opened until the delay time (for example, 30 seconds to 1 minute) has elapsed. Even if the switch 21 is closed continuously, the switch operation will be invalidated. For example, if the string 22 is pulled by mistake immediately after reaching the refueling position B, the switch 2
Even if the lifting motor 12 is closed, an accident in which the lifting motor 12 suddenly rotates upward can be prevented. On the other hand, the AND circuit 28 and the FF circuit 39 constitute a switch raising operation disabling circuit, and as described above, the FF circuit 39
9 is set to the set state by the output from the AND circuit 30 constituting the switch lowering operation completion confirmation circuit, and the gate of the AND circuit 28 is opened by the output from the FF circuit 39. is the lower end switch 17 at the refueling position B.
The gate will not open unless the switch 21 is opened once when the gate is closed. Therefore, when the refueling nozzle 14 reaches the refueling position B, even if, for example, the string 22 remains caught on the car body or the like and the switch 21 remains closed, the gate of the AND circuit 28 will not be opened,
Accidents in which the lifting motor 12 suddenly rotates upward can be reliably prevented.

In the embodiment of the present invention, the hose elevator 10 has been described as one that rotates the hose reel 11 by the motor 12 and raises and lowers the refueling nozzle 14, but the hose reel 11 is eliminated and the hose 1
By rotating the hose 1 while holding the
A pair of hose lifting rollers are provided to lift and lower the hose.
A hose elevator configured to raise and lower the refueling nozzle 14 by rotating the roller with the motor 12 may be used. Furthermore, although the refueling nozzle 14 has been described as moving up and down between the standby position A and the refueling position B, it may be configured to move up and down between the storage position C near the hose elevator 10 and the refueling position B. . In addition, the control circuit 24 of this embodiment
Now, the display meter 19 is set so that the lowering operation is performed by operating the switch 21 only once for a short period of time, and the continuous refueling is performed by operating the switch 21 for a short period of time twice.
Although it has been described that the reset operation is performed and the switch 21 is continuously closed for a period longer than the set time of the timer 38, the rising operation is performed.
It goes without saying that the present invention is not limited to this, and that the circuit structure can be configured to perform arbitrary operations depending on various operation modes such as the number of times the switch 21 is operated and the operation time. Furthermore, when continuous refueling operation is not required, a counter 46, a delay circuit 47, an OR circuit 48
MM circuit 31 is omitted, and the reset circuit consisting of
The display meter 19 may be directly reset to zero using the output from the display.

The suspension type refueling device according to the present invention is as described in detail above, and is provided with a single switch for lifting and lowering the hose in the middle of the refueling nozzle or hose, and the operation mode such as the operation time and number of operations of the switch can be adjusted. A lift control circuit is provided to control the elevation of the motor of the hose elevator in accordance with the above, and a switch lowering operation completion confirmation circuit detects that the lowering operation of the switch is completed and the refueling nozzle is lowered to a predetermined position to drive the pump. Because of the structure in which the switchbox is provided, the shape of the switchbox can be reduced in size, the operability of the refueling nozzle is improved, and an accident in which the switchbox collides with a vehicle and is damaged can be prevented. In addition, when the refueling nozzle has descended to a predetermined position such as the refueling position, the pump will not operate unless the switch is opened once and the lowering operation of the switch is confirmed to have been completed, so the operator must be aware that refueling is possible. This can give reliability to the refueling operation. Furthermore, even if the switch is turned on immediately after reaching the refueling position, or if the switch is closed continuously, there is no chance of an accident in which the hose elevator suddenly rotates upward and the refueling nozzle rises. By adding a prevention circuit, there are many effects such as being able to reliably prevent erroneous operations.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram of a suspended oil supply system according to the present invention, Fig. 2 is a control circuit diagram, Fig. 3 is a diagram showing the operating state of the control circuit shown in Fig. 2, and Fig. 3A is a diagram showing the operating state of the control circuit shown in Fig. 2. FIG. 3(b) is a diagram during the descending operation, FIG. 3(b) is a diagram during the display meter reset operation, and FIG. 3(c) is a diagram during the ascending operation. 1... Site, 3... High place, 4... Piping, 5...
Tank, 7...Pump, 8...Flowmeter, 10...
Hose elevator, 11...Reel, 12...Motor, 13...Hose, 14...Refueling nozzle, 1
5, 20... Switchbox, 16, 17, 2
1...Switch, 24...Control circuit.

Claims (1)

[Scope of Claims] 1. A hose elevator operated by a lifting motor is provided at a high place at a gas station, and the hose elevator is provided with a hose having a refueling nozzle at its tip, one end of which is connected to the hose elevator, and the other end of which is connected to the hose elevator. In a suspended type refueling system, a pump driven by a pump motor and a flow meter are installed in the middle of a pipe connected to a tank, and the hose elevator has a refueling nozzle that is lowered to a predetermined refueling position or is on standby. A position detector is provided to detect when the fuel supply nozzle or the hose has been raised to a certain position, and a single switch for raising and lowering the hose is provided in the middle of the refueling nozzle or hose, and the operation output of the switch and the detection output of the position detector are supplied. , when the position detector detects the standby position, the lifting motor is driven downward by operating the switch, and when the position detector detects the refueling position, the lifting motor is driven downward. When the position detector is detecting the refueling position, the lifting motor is driven upward by operating the switch, and when the position detector detects the standby position, the lifting motor is driven upward. A lift control circuit for stopping the upward drive is provided, the operation output of the switch and the detection output of the position detector are supplied, and the switch is operated in the standby position in order to lower the refueling nozzle from the standby position to the refueling position. A switch lowering operation completion confirmation circuit is provided which outputs a lowering operation completion signal based on the de-energization of the operation output of the switch and the detection of the refueling position of the position detector, 1. A suspended oil supply system, comprising: a pump control circuit to which an operation end signal is supplied and which starts the pump motor upon input of the lowering operation end signal. 2. A hose elevator operated by a lifting motor is installed at a high place at a gas station, and the hose elevator is equipped with a hose having a refueling nozzle at the tip, one end of which is connected to the hose elevator, and the other end is connected to a pipe connected to the tank. In a suspended type refueling device which is provided with a pump driven by a pump motor and a flow meter on the way, the hose elevator is provided with a signal indicating when the refueling nozzle has descended to a predetermined refueling position or has risen to a standby position. A position detector is provided for detection, and a single switch for lifting and lowering the hose is provided in the middle of the refueling nozzle or hose, and the operation output of the switch and the detection output of the position detector are supplied, and the position detector When the standby position is being detected, the switch is operated to drive the lifting motor downward, and when the position detector detects the refueling position, the driving of the lifting motor to move downward is stopped; When the detector is detecting the refueling position, the lifting motor is driven upward by operating the switch, and when the position detector detects the standby position, the lifting motor is stopped. A control circuit is provided, and the operation output of the switch and the detection output of the position detector are supplied, and when the switch is operated at the standby position in order to lower the refueling nozzle from the standby position to the refueling position, the switch is activated. A switch lowering operation completion confirmation circuit is provided which outputs a lowering operation completion signal based on the de-energization of the operation output of the switch and the detection of the refueling position of the position detector, and the lowering operation completion signal is supplied from the switch lowering operation completion confirmation circuit. , when the lowering operation end signal is not input, a switch raising operation that prohibits the operation output from being output from the raising/lowering control circuit to the lifting motor as a lifting drive signal based on the operation of the switch at the refueling position; A suspended oil supply device characterized by being provided with a nullification circuit.