JPS638640Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention uses a hose elevator installed at a high place at a gas station to raise and lower a refueling hose that has a refueling nozzle at the tip, and uses the refueling nozzle to supply fuel to a vehicle. The present invention relates to an improvement of a suspended type oil supply device that supplies oil.

(Prior Art) 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 refueling hose having a refueling nozzle at the tip. A pump and a flow meter are installed in the middle of the pipe where one end is connected to the refueling hose and the other end is connected to the tank, and a refueling amount indicator that displays the amount of refueling measured by the flow meter is installed at an appropriate location at the refueling station where customers can see it. A switch box is provided at the refueling nozzle or in the middle of the hose near the refueling nozzle, and the switch box includes a switch for lowering the motor, a switch for raising the motor, and a switch for resetting the refueling amount indicator. A suspended type oil supply device having three switches is known. Then, by operating the lowering operation switch, for example, 1.8
The motor rotates downward so that the refueling nozzle at the standby position above m descends to the refueling position where the vehicle should be refueled, and by operating the lift switch, the refueling nozzle at the refueling position rises to the standby position. The motor rotates upward, and by operating the reset operation switch, the previous refueling amount display value is reset to zero while the refueling nozzle is lowered to the refueling position, allowing continuous refueling. .

(Problem to be solved by the invention) In this suspended type refueling system, even though the refueling hose is lowered to the refueling position and refueling is performed using the refueling nozzle, an inexperienced refueling operator may mistakenly move the refueling device upward. I accidentally operated the switch,
There are cases where the switch box comes into contact with the vehicle and the lift operation switch is operated without the refueling operator's knowledge.

In such a case, when the lifting operation switch is operated, the hose lifting motor of the hose elevator starts rotating upward in order to raise the refueling hose from the refueling position to the standby position. Although the pump that is feeding the oil liquid is deenergized, the oil remaining in the oil supply nozzle and the oil supply hose leaks from the rising oil supply nozzle into the surrounding area, which is dangerous. There was a risk of collision with the vehicle and damage to the vehicle. Furthermore, if the refueling nozzle is tightly latched onto the vehicle's refueling port, the refueling hose cannot rise, so the motor for lifting and lowering the hose may be overloaded and burnt out, or the hose may become stretched. There was also a risk that damage would occur and oil would leak into the surrounding area from the damaged location.

Therefore, in order to solve these drawbacks, as in the technique described in Japanese Patent Application Laid-Open No. 134093/1983,
During refueling, while the flow rate pulse continues to be output from the flow rate pulse transmitter attached to the flow meter, the operation of the lifting operation switch is ignored and refueling continues as is without raising the refueling nozzle. is being considered.

However, with this technology, as soon as the output of the flow rate pulse stops, the operation of the lift operation switch is accepted, so it is difficult for refueling workers to arrive at the refueling location one by one, especially for preset refueling or full tank refueling. At the very least, during automatic refueling, when refueling ends automatically, if the switch box contacts the vehicle without the refueling operator's knowledge and the lift operation switch continues to be operated, or when the refueling operator is about to finish refueling. If an inexperienced refueling operator mistakenly continues to operate the raising operation switch, the same problem as described above will occur. In other words, if the rising operation switch continues to be operated gradually, after the flow rate pulse output stops due to the end of automatic lubrication,
In the end, the refueling nozzle was raised immediately with the refueling nozzle still inserted into the vehicle's refueling port.
At that time, there was still a risk of problems such as leakage of oil, damage to the vehicle, and damage to the hose and the motor for lifting and lowering the hose.

(Means for Solving the Problems) The present invention improves the drawbacks of the above-mentioned prior art, and is characterized by a control device that controls the drive of the motor of the hose elevator according to the operation of the lift switch. a determination circuit that causes the refueling device to stop refueling by operating a lift switch, and at that time determines whether or not refueling is in progress and outputs a refueling confirmation signal or a refueling end confirmation signal; A lift control circuit that drives the motor of the hose elevator upward in response to a refueling completion confirmation signal output from the circuit; and a lift control circuit that drives the motor of the hose elevator upward in response to a refueling completion confirmation signal output from the circuit; This is a suspension type refueling device consisting of a refueling restart control circuit for canceling a stopped state.

(Function) With this configuration, even if the lift switch is operated incorrectly during refueling, the discrimination circuit of the control device will stop the refueling and determine that the refueling is in progress and refuel. Since the lift control circuit outputs a confirmation signal, the hose elevator motor will not drive up and the refueling hose will not rise accidentally, and the refueling restart control circuit will stop refueling until the lift switch is operated. There is no way to release the condition. Therefore, if the lift switch is operated incorrectly, refueling will be interrupted and will not end. Therefore, unlike conventional systems, the refueling nozzle does not rise immediately after refueling, leaks oil from the refueling nozzle, damages the vehicle, or damages the refueling hose or lifting motor. , is safe.

(Embodiment) 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 pulse transmitter 9 is attached to transmit a flow rate pulse 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 refueling hose 13 is wound around the hose reel 11, and a refueling nozzle 1 is installed at the tip of the hose 13.
4 is installed. On the other hand, the hose elevator 10
Inside is a switch box 15 for nozzle position detection.
is provided, and in the switch box 15, according to the rotation of the motor 12 or the hose reel 11,
The storage position detection switch 16 detects that the refueling nozzle is in the storage position A near the hose elevator 10 as shown in the figure and closes it, and the standby switch 16 detects that the refueling nozzle is in the waiting position B about 1.8 m from the ground and closes it. A position detection switch 17 and a refueling position detection switch 18 that detects when the vehicle is at refueling position C and closes the refueling position are built in (each of the switches 16, 17, 18
(see Fig. 2 for details), and is connected to a control panel 19 installed in an office or the like in building 2.

Reference numeral 20 denotes a refueling amount indicator installed at a suitable location in the fueling station that can be seen by customers, such as a high place in the building 2, such as an inverted plate indicator or a light emitting diode indicator. Ru. And the display 20
is connected to the flow rate pulse transmitter 9 through a counting circuit and a drive circuit (not shown) built into the control panel 19, and displays the amount of oil to be supplied in proportion to the flow rate pulse signal from the flow rate pulse transmitter 9. It is composed of

Furthermore, the refueling nozzle 1 is inserted in the middle of the refueling hose 13.
4, there is a refueling hose 13 and a refueling nozzle 1
Switchbox 2 is interposed between 4 and 4.
1 is provided, and the switch box 21 includes a lowering switch 22 for lowering the refueling nozzle 14 from the standby position B to the refueling position C;
A raise/zero reset switch 23 is built in as a single switch for raising the fuel supply from the refueling position C to the standby position B and resetting the refueling amount indicator 20. It is configured to be operable. The switches 22 and 23 are connected to the control panel 19 via a signal line 25 wound around the refueling hose 13.
is connected to.

Next, in FIG. 2, 30 indicates a control device provided in the control panel 19, and the control device 30 includes interfaces 31, 32, 33, and an arithmetic and control device 3.
4, a timer 35, and a storage section 36;

The above-mentioned refueling amount indicator 20 is connected to the interface 31 via an indicator drive circuit 38, and a storage, standby, and refueling position detection switch provided in a switch box 15 for detecting the position of the hose elevator 10 is connected to the interface 31. 16, 17, 18 and lowering, raising/zero reset switches 22, 23 provided in a switch box 21 near the refueling nozzle 14 are connected, respectively. Note that 39 is a main switch (not shown in FIG. 1) provided on the control panel 19, and the main switch 39 has two switches for raising and lowering, and the lowering switch 4
0. By operating the lift switch 41, the refueling nozzle 14 is raised and lowered between the storage position A and the standby position B shown in FIG. 1 at the start and end of the workday.
Furthermore, the above-mentioned pump motor 6 and hose lifting motor 12 are connected to the interface 32 via a pump motor drive circuit 42 and a hose lifting motor drive circuit 43, respectively. A pulse transmitter 9 is connected.

Thereby, in the control device 30, based on the control means stored in the storage section 36, the arithmetic control device 3
4, it is configured to perform the following operations.

First, when the refueling nozzle 14 is in the standby position B and the standby position detection switch 17 is closed, the string 2
When the pull down switch 22 is closed by pulling 4,
The signal is taken into the arithmetic and control device 34 via the interface 31, and the arithmetic and control device 34 outputs a descending signal to the descending signal input a of the hose lifting motor drive circuit 43 via the interface 32,
The hose lifting motor 12 is driven to rotate downward.
When the refueling nozzle 14 descends to the refueling position C and the refueling position detection switch 18 closes, the signal is transmitted to the arithmetic and control unit 3 via the interface 31.
4, and the arithmetic and control unit 34 connects the hose lifting motor drive circuit 4 via the interface 32.
3, outputs a drive signal to the drive signal input d of the pump motor drive circuit 42, and resets the display drive circuit 38 via the interface 31. A zero reset signal is output to the signal input e.
As a result, the lifting motor 12 is stopped, the pump motor 6 is driven, and the displayed value of the oil supply amount display 20 is reset to zero.

While the lever of the refueling nozzle 14 is operated to open its main valve (not shown) and refueling is performed, the arithmetic and control unit 34 receives the output from the flow rate pulse generator 9 via the interface 33. The amount of oil to be supplied is calculated by counting the flow rate pulses, and outputs this amount of oil to the display drive circuit 38 via the interface 31 to display the amount of oil supplied to the oil amount display 2.
Display it as 0.

On the other hand, when the refueling nozzle 14 at the refueling position C is raised to the standby position B, or when the display on the refueling amount display 20 is reset to zero while the refueling nozzle 14 is at the refueling position C, the interface 31, 32, 33, arithmetic and control device 34, timer 35, and storage section 36 constitute a control circuit 44 as shown in FIG.

In FIG. 3, 50 and 51 are metastable times τ ₁ ,
τ ₂ sec monostable multivibrator circuit (hereinafter, monostable multivibrator circuit is referred to as MM circuit), 52 and 53 are for trigger pulse generation.
The MM circuits, 54, 55, and 56 are R-S flip-flop circuits (hereinafter referred to as flip-flop circuits)
(referred to as a circuit). 57 is a counter circuit that counts flow rate pulses, and 58 is a predetermined value n.
a memory circuit 59 stores the count value m of the flow rate pulses of the counter circuit 57 and the memory circuit 5;
8 is compared with a predetermined value n stored in 8, and when n>m, that is, the refueling is completed, a refueling end confirmation signal is output from the comparison output g, and when n≦m, that is, the refueling is in progress. This is a comparison circuit that generates a refueling confirmation signal from the comparison output g when . Note that the memory circuit 58 stores, as a criterion factor for determining whether the refueling is completed or in the refueling state, when the pump motor 6 is stopped while the pump 7 is being driven and the main valve of the refueling nozzle 14 is open to refuel. , a count value of flow rate pulses as an overflow amount generated by the inertia of the pump motor 6 is stored as a predetermined value n. In the same figure, the refueling position detection switch 1
8 and the rise/zero reset switch 23 are connected to the NOT circuit 61 via the AND circuit 60.
The output is input to a first timer circuit 63 consisting of an MM circuit 50, a NOT circuit 62, and an MM circuit 52, and in the timer circuit 63, when the refueling nozzle 14 is at the refueling position C, the rising When the zero reset switch 23 is closed and the switch 23 returns to the open state, a time-limited pulse having a time width of τ ₁ sec is output, and the MM circuit 5
2 outputs a trigger pulse when the time-limited pulse disappears. Further, the output of the rise/zero reset switch 23 is the MM of the first timer circuit 63.
The output of the circuit 50 is also input to the AND circuit 64, and the output of the AND circuit 64 is input to the FF circuit 54.
The AND circuit 64, the FF circuit 54, the NOT circuit 61, and the MM circuit 50 constitute an operation mode discrimination circuit 65. On the other hand, the output of the AND circuit 60 and the MM circuit 5
An output of 0 is input to the OR circuit 66, and the output is
The output of the circuit 66 is the reset input R of the FF circuit 56.
The output of the OR circuit 66 and the output of the flow rate pulse generator 9 are input to an AND circuit 67. Then, the output of the AND circuit 67 is input to the counting input h of the counter circuit 57, whereby the flow pulse generated from the flow pulse generator 9 is input to the counter circuit 57 using the output of the OR circuit 66 as a gate signal. be done. Further, the time limit output i of the first timer circuit 63 (MM circuit 5
2) are input to AND circuits 68, 69, and 70, respectively, and the AND circuit 68 receives the nozzle rise determination output j (FF circuit 5) of the operation mode determination circuit 65.
4) and the comparison output g of the comparison circuit 59 are further input, and the AND circuit 69 receives the display zero reset discrimination output k of the operation mode discrimination circuit 65.
(Output Q of the FF circuit 54) and the comparison output g of the comparison circuit 58 are further inputted, and the comparison output g of the comparison circuit 59 is further inputted to the AND circuit 70 via the NOT circuit 71. And the AND
The output of the circuit 68 is sent to the FF circuit 5 via the OR circuit 72.
The output Q of the FF circuit 55 is input to the set input S of No. 5, and the output Q of the FF circuit 55 is input to the ascending signal input b of the hose elevating motor drive circuit 43. In addition, the OR circuit 72
For example, the switch output of the standby position detection switch 17 and the switch output of the up switch 41 of the main switch 39 are inputted as other inputs under an AND condition, and the main switch 3 at the standby position B is input.
The FF circuit 55 is also configured to be set by operating the lift switch 41 of 9, and the switch outputs of the standby position detection switch 17 and the storage position detection switch 16 are connected to the reset input R of the FF circuit as a trigger pulse. The signal is converted and inputted, and the FF circuit 55 is configured to be reset by closing the switches 16 and 17. Also, the above
The output of the AND circuit 69 is input to the reset input e of the display drive circuit 38 via the MM circuit 51, the NOT circuit 73, the second timer circuit 74 constituted by the MM circuit 53, and the OR circuit 75.

Note that, for example, the output of the refueling position detection switch 18 is converted into a trigger pulse and inputted to other inputs of the OR circuit 75. Furthermore, AND circuit 7
The output of 0 is inputted to the set input S of the FF circuit 56 via the OR circuit 76, and the output Q of the FF circuit 56 is inputted to the set input S of the FF circuit 56.
is the drive signal input d of the pump motor drive circuit 42
has been entered. Note that, for example, the switch output of the refueling position detection switch 18 is converted into a trigger pulse and inputted to other inputs of the OR circuit 76. The output of the OR circuit 76 is input to the FF circuit 54 of the operation mode discriminating circuit 65 and the reset input R of the counter circuit 57.
The reset input R of the FF circuit 56 is connected to the OR circuit 6.
6 output is input.

In the control circuit 44 described above, the first timer circuit 63, the OR circuit 66, the AND
The circuit 67, counter circuit 57, memory circuit 58, comparator circuit 59, and FF circuit 56 stop the drive of the pump 7 by operating the rise/zero reset switch 23, and during that time measure the refueling amount and set it to a predetermined value h. A determination circuit is constructed to determine whether refueling was in progress when the switch was operated, and includes a first timer circuit 63, an AND circuit 68,
The OR circuit 72 and the FF circuit 55 constitute a lift control circuit that receives the refueling completion confirmation signal output from the discrimination circuit and drives the hose lift motor 12 upward, and includes a first timer circuit 63, an OR circuit 66,
AND circuit 70, NOT circuit 71, OR circuit 76,
The FF circuit 56 constitutes a refueling restart control circuit which receives the refueling confirmation signal outputted from the discrimination circuit and restarts the pump after a predetermined period of time has elapsed since the switch 23 was opened, that is, after the switch 23 has been operated.

The suspension type oil supply system of this embodiment is constructed as described above.Next, the operation when the rise/zero reset switch 23 is operated in this suspension type oil supply system will be explained with reference to the time chart shown in FIG. do.

First, the time chart in Fig. 4A shows that when refueling is completed, the lift/zero reset switch 23 is operated to move the refueling nozzle 14 from the refueling position C to the standby position B.
This shows the operation when raising the
This will be explained together with the control circuit 44 shown in FIG.

When the refueling nozzle 14 at the refueling position C is to be raised to the standby position B in the refueling completed state, the lift/zero reset switch 23 is closed/opened only once (see FIG. 4-1). This allows the first
The MM circuit 50 of the timer circuit 63 outputs a timed pulse with a time width τ ₁ when the switch 23 returns to the open state, and the MM circuit 52 outputs a trigger pulse having an appropriate time width when the timed pulse disappears. . Further, the output pulse of the AND circuit 60 and the time-limited pulse output from the MM circuit 50 are also input to the OR circuit 66, so the OR circuit 66 is used while the switch 23 is closed and when the switch 23 is opened. Since it is "1" for the next τ ₁ sec, the output of the OR circuit 66 is the reset input R.
The output Q of the FF circuit 56 inputted to the switch 23 becomes "0", the stop signal "0" is inputted to the drive signal input d of the pump motor drive circuit 42, and the pump 7 is stopped at the same time as the switch 23 is operated. (4th
(See Figure E-3). Furthermore, an AND circuit 67 to which the output of the OR circuit 66 is similarly input as a gate signal.
The output of the OR circuit 66 is “1” while the switch 23 is closed and for τ ₁ sec after the switch 23 is opened, so the gate is opened and the flow rate pulse is counted by the counter circuit 57. However, when the refueling is completed, the main valve of the refueling nozzle 14 is closed, and the flow rate pulse is not input to the counting input h of the counter circuit 57 (see Fig. 4 A-2). . Therefore, the counter circuit 57
The flow rate pulse count value m is not greater than the predetermined value n stored in the storage circuit 58, and the comparison output g of the comparison circuit 59 is kept at "1", that is, a refueling completion confirmation signal is output. In addition, since the switch 23 is opened and closed only once, the pulse generated by the closing of the switch 23 again is not inputted to the set input S of the FF circuit 54 of the operation mode discrimination circuit 65 via the AND circuit 64. The output Q and the inverted output are kept at "0" and "1" to determine that the nozzle is in the ascending mode.

As a result, the time limit output i of the first timer circuit 63
When a trigger pulse is output, the nozzle rise discrimination output j and zero reset discrimination output k of the operation mode discrimination circuit 65 are kept at "1" and "0", respectively, and the comparison output g of the comparison circuit 59 becomes "1". Since it is preserved,
AND circuit 6 of each AND circuit 68, 69, 70
The trigger pulse outputted from the first timer circuit 63 is output only from the circuit 8, and the trigger pulse is inputted to the set input S of the FF circuit 55 via the OR circuit 72. Therefore, the output Q of the FF circuit 55 becomes "1", and the hose lifting motor drive circuit 43
A drive signal "1" is input to the rising signal input b (see 4th A-4), the hose lifting motor 12 rotates upward, and the refueling nozzle 14 is raised to the standby position B.

Next, the time chart shown in Fig. 4 (b) shows that when refueling is completed, the rising/zero reset switch 23 is operated to lower the refueling nozzle 14 to the refueling position C, and the value displayed on the refueling amount indicator 20 is reset to zero. This figure shows the operation at the time of the control, and this will be similarly explained using the control circuit 44 shown in FIG.

To reset the displayed value of the refueling amount display 20 to zero while the refueling nozzle 14 is lowered to the refueling position C in the refueling completed state, operate the raise/zero reset switch 23 twice in succession (the fourth
(See Figure RO-1). As a result, as in the case of the nozzle rise described above, a trigger pulse is output from the time-limited output i of the first timer circuit 63 after τ ₁ sec has elapsed after the first closing/opening of the switch 23, and a trigger pulse is output from the time-limited output i of the first timer circuit 63. The comparison output g is kept at "1", and the comparison circuit 59 outputs a refueling completion confirmation signal. At this time, as in the case of nozzle rise, while the switch 23 is closed and the time-limited pulse is output from the MM circuit 50, the FF
The circuit 56 is reset and the pump motor 6 is stopped (see Figure 4, row 3). However, in the AND circuit 64 of the operation mode discrimination circuit 54,
While the time-limited pulse is input from the MM circuit 50, a pulse due to the second closing of the switch 23 is input, so that the set input S of the FF circuit 54 is input.
A pulse resulting from the second closing of the switch 23 is input to the FF circuit 64 via the AND circuit 64, and the output Q and the inverted output of the FF circuit 54 become "1" and "0". Therefore, the nozzle rise determination output j and the zero reset determination output k of the operation mode determination circuit 65 become "0" and "1", respectively, and it is determined that the operation is a zero reset operation.

As a result, the time limit output i of the first timer circuit 63
When a trigger pulse is output from the operating mode discriminating circuit 65, the nozzle rise discrimination output j and the zero reset discrimination output k are kept at "0" and "1", respectively, and the comparison output g of the comparator circuit 59 is "1". Therefore, the trigger pulse output from the first timer circuit 63 is output only from the AND circuit 69 among the AND circuits 68, 69, and 70. The trigger pulse output from the AND circuit 67 is delayed by the metastable time τ ₂ sec set by the MM circuit 51 of the second timer circuit 74, and then sent to the reset input e of the display drive circuit 38 via the OR circuit 75. is inputted as a reset signal (see FIG. 4, row 5), and the displayed value of the oil supply amount display 20 is reset to zero.

Furthermore, the time chart shown in FIG. 4C shows the operation when the rise/zero reset switch 23 is operated by mistake during refueling, and this is handled by the control circuit 44 shown in FIG. Explain in the same way.

Accidentally raised/zero reset switch 23 during refueling
is operated to close and open (see Figure 4 H-1)
Then, the reset input R of the FF circuit 56 is input as in the case of the nozzle raising operation and the display zero reset operation described above.
is "1" while the switch 23 is closed and the time-limited pulse is output from the MM circuit 50, and the output Q of the FF circuit 56 is "0", so that the pump motor drive circuit 42 is A stop signal “0” is input to the drive signal input d, and the pump 7
When the switch 23 is operated, it is stopped at least while the switch 23 is closed (see Fig. 4, H-3).

On the other hand, while the switch 23 is closed and for τ ₁ sec after the switch 23 is opened, the AND circuit 67 inputs the flow rate pulse outputted from the flow rate pulse generator 9 to the counting input h of the counter circuit 57.
Output to. However, unlike the refueling completed state, in the refueling state, the main valve of the refueling nozzle 14 is opened and refueling is performed, so even if the drive of the pump 7 is stopped at the same time as the switch 23 is operated, the pump motor 6 An overflow amount is generated due to the inertia, etc. of transmitted to. Therefore, the counter circuit 57 counts the flow rate pulses due to this overflow amount.
The count value m of 7 becomes greater than or equal to the predetermined value n stored in advance in the memory circuit 58, the comparison output g of the comparison circuit 59 becomes "0", and the comparison circuit 59 outputs a refueling confirmation signal. As a result, a trigger pulse is output from the time-limited output i of the first timer circuit 63 after τ ₁ sec has elapsed after the switch 23 returns to the open state, as in the case described above. Since the comparison output g is kept at "0", this trigger pulse is output only from the AND circuit 70 among the AND circuits 68, 69, and 70 to which it is input, and the hose lifting motor 12 is driven and the refueling The trigger pulse output from the AND circuit 70 is input to the set input S of the FF circuit 56 via the OR circuit 76 without the quantity display 20 being reset to zero (see Figure 4, H-4 and 5). , applicable
The output Q of the FF circuit 56 becomes "1" again, and the drive signal "1" is input again to the drive signal input d of the pump motor drive circuit 42, that is, the switch 2
After completion of the closing operation in step 3, the pump motor 6 is driven again (see Figure 4, H-3), and oil supply is resumed and continued.

Note that the trigger pulse that is the output of the OR circuit 76 at this time is input to the set input S of the FF circuit 56 as described above, and is also input to the counter circuit 57.
Reset input R, FF of operation mode discrimination circuit 65
It is also input to the reset input R of the circuit 54, and the count value m of the counter circuit 57 and the output Q of the FF circuit 54 are reset at the same time as the pump motor 6 is restarted.

Note that in the above description, the first timer circuit 6
3, the time width τ ₁ of the time-limited pulse output from the MM circuit 50 and the time width of the trigger pulse output from the MM circuit 52 are necessary for confirming the overflow amount to determine the refueling end state or the refueling state. Needless to say, it is set appropriately in consideration of the time and the time required for the operator to operate the switch 23 again for continuous refueling.

The delay of the trigger pulse of τ ₂ sec set by the MM circuit 51 or the like in the second timer circuit 74 is provided so that the operator can confirm that the refueling amount indicator 20 has been reset, and is set as appropriate. Therefore, the second timer circuit 74 does not necessarily need to be provided.

Note that in this embodiment, the hose elevator 10
has been described in which the hose reel 11 is rotated by the motor 12 to move the refueling nozzle 14 up and down. It is also possible to use a hose elevator of the type in which a hose lifting roller is provided and the refueling nozzle 14 is raised and lowered by rotating the roller by the motor 12.

Further, in the control circuit 44 of this embodiment, when the switch 23 is operated only once, the refueling nozzle 14 is raised, and when the switch 23 is operated twice consecutively within a predetermined period of time, the refueling amount indicator is raised. 20
Although it was described as resetting the displayed value to zero,
Of course, the present invention is not limited to such a control circuit, and a circuit configuration that performs a predetermined operation depending on various operation modes such as the number of times the switch 23 is operated, the operation time, etc. can be used.

Furthermore, the lowering switch 22 that lowers the refueling nozzle 14 from the standby position B to the refueling position C also raises and lowers on the condition that the standby position detection switch 17 is closed.
If the zero reset switch 23 can be used, the refueling nozzle 14 can be raised and lowered between the standby position B and the refueling position C, and the refueling amount indicator 20 can be reset to zero with a single switch. It is possible.

(Effects of the invention) The suspension type oil supply device according to the invention has been described in detail above, and has the following effects.

If the lifting operation switch is closed or opened due to a simple human error during refueling, the refueling will be stopped at the same time as the switch is closed, and the refueling hose will be prohibited from rising. This prevents the hose from rising and causing oil to leak from the fuel nozzle or causing damage to the vehicle.

Especially in the case of suspended refueling equipment equipped with automatic refueling functions such as preset refueling and full tank refueling,
If the lift operation switch continues to be operated during refueling, the refueling device according to the present invention stops driving the pump and interrupts refueling while the switch continues to be operated, so the value displayed on the refueling amount indicator This abnormal condition can be easily confirmed because the count is not increased, and automatic lubrication will not end unless the condition is corrected, so switch operation is only accepted while the lubrication flow rate pulse is being output. After the flow rate pulse stops due to automatic refueling ending, the refueling nozzle is not raised while it is still inserted into the vehicle's refueling opening, which is the case when refueling is continued without any damage to the vehicle. There is no risk of overloading the hose lifting motor and burning it out.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of a suspended oil supply system according to the present invention, Fig. 2 is a system configuration diagram of Fig. 1, Fig. 3 is a circuit diagram showing the control means of Fig. 2, and Fig. 4 Figure 4 (b) is a time chart when the switch is operated to raise the switch when refueling has been completed. Figure 4 (c) is a time chart when the switch is reset to zero when the refueling is complete. A time chart diagram of each time is shown. 1... Site, 3... High place, 4... Piping, 5...
Tank, 7... Pump 8... Flow meter, 10... Hose elevator, 11... Reel, 12... Motor,
13...Hose, 14...Refueling nozzle, 15,2
0... Switch box, 23... Raise/zero reset switch, 30... Control device, 44... Control circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A hose elevator operated by a motor is provided at a high place at a gas station, and the hose elevator is provided with a refueling hose having a refueling nozzle at the tip, and one end is connected to the refueling hose. A pump and a flow meter are installed in the middle of the piping whose other end connects to the tank, a refueling amount indicator is installed at an appropriate location of the refueling station where customers can see the refueling amount, and in the middle of the refueling nozzle or refueling hose, In a suspended refueling system, the suspension type refueling device is provided with a lifting switch for raising the refueling hose that has been lowered to the refueling position, and a control device that drives and controls the motor of the hose elevator in accordance with the operation of the lifting switch. , the control device causes the refueling device to stop refueling by operating the lift switch, and at that time, determines whether or not refueling is in progress and outputs a refueling confirmation signal or a refueling end confirmation signal. circuit and
a lift control circuit that drives the motor of the hose elevator upward in response to a refueling end confirmation signal output from the discrimination circuit; and after the operation of the lift switch is completed in response to a refueling confirmation signal output from the discrimination circuit. , and a refueling restart control circuit for canceling a refueling stop state. (2) The suspension type oil supply system according to claim 1, wherein the discrimination circuit brings the oil supply system into a refueling stop state by stopping driving of the pump. (3) The suspended fuel supply system according to claim 2, wherein the fuel supply restart control circuit releases the fuel supply stop state by driving the pump again. (4) The suspended fuel supply system according to claim 1, wherein the discrimination circuit discriminates whether or not fuel is being supplied based on the presence or absence of a flow rate pulse from the flowmeter.