JPH0221439Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a suspended refueling device used in gas stations and the like.

[Prior art]

As is well known, in a suspended refueling system, a refueling hose with a refueling nozzle attached to the tip is suspended, and the refueling nozzle is stored in a location that is out of reach of people and at a height that does not impede access to and from the vehicle. It is designed to move up and down between three stopping positions: a standby position at a height that is high enough and a refueling position at a height where refueling work can be performed.

Now, in recent years, some suspension type oil supply devices are equipped with a so-called preset oil supply function, which automatically supplies a preset amount of oil. This is a method in which when the amount of oil supplied reaches a preset amount, the pump is stopped and the oil supply is stopped, thereby performing a fixed amount of oil supply.

``The problem that the invention aims to solve'' By the way, in such preset lubrication, it is necessary to turn on the solenoid valve in the middle of the pump or piping. Since it is off, the fluid pressure inside the refueling hose after refueling becomes significantly lower than in the case of so-called normal refueling, which is caused by opening and closing the refueling nozzle. That is, after normal refueling, the fluid pressure inside the refueling hose is high and the refueling hose is in a tense state, whereas after preset refueling, the fluid pressure inside the refueling hose is low. The refueling hose is in a relaxed state. As a result, if the refueling nozzle is lowered from the standby position to the refueling position when the fluid pressure is low, when the pump is activated and the fluid pressure increases, the refueling hose becomes tense, the refueling nozzle rises, and the refueling position is moved to the refueling position. However, there is an inconvenience that the refueling position changes to a higher position than the original refueling position. In addition, when preset refueling is performed at the original refueling position, when refueling is finished, the fluid pressure decreases, the refueling hose loosens, and the refueling nozzle descends. This causes the inconvenience that the position changes to a position lower than the standby position.

In view of the above-mentioned circumstances, the object of this invention is to provide a suspended refueling device that can keep the standby position and the refueling position constant at all times.

[Means for solving problems]

In order to achieve the above objective, this invention is designed to send out or rewind the refueling hose by rotating the lifting source installed in the delivery unit at the height of the refueling station in the forward or reverse direction, thereby attaching it to the tip of the refueling hose. Raise and lower the refueling nozzle that is
A lifting pulse that outputs a number of lifting pulses corresponding to the amount of rotation of a rotating body that rotates as the refueling hose is moved by sending out or rewinding, in a suspended refueling device that moves between predetermined lifting positions. A transmitter and an oil amount measurement memory that measures and stores the amount of oil required to fill the oil supply hose to a tensioned state at the start of refueling from a relaxed state in which the internal hydraulic pressure has decreased due to preset oiling. and a lifting pulse storage means in which a number of lifting pulses corresponding to a distance between a predetermined lifting position is stored, and a correction value for the number of lifting pulses stored in the lifting pulse storage means is stored in the oil amount. a correction pulse storage means which is stored in advance corresponding to the preset refueling; a preset refueling determining means for determining whether or not the latest refueling end was due to preset refueling; When the oil supply hose, which has become relaxed due to preset oil supply, is raised and lowered between predetermined lifting positions, the correction pulse storage means uses the oil amount stored in the oil amount measurement storage means. A corresponding correction value is selected from , and the number of lifting pulses stored in the lifting pulse storage means is corrected by the selected correction value, and the number of lifting pulses corrected by the correction value and the lifting pulse are The apparatus is configured to include a control means for driving and controlling the lifting source so that the number of lifting pulses outputted from the oscillator matches the number of lifting pulses outputted from the transmitter.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing a suspension type oil supply system according to an embodiment of this invention. In this figure, 1 is an oil storage tank, 2 and 3 are a pump that pumps up oil from the oil storage tank 1, and a pump motor that drives the pump 2, respectively. Further, 4 is a flow meter, and a flow pulse generator (not shown) attached to the flow meter 4 outputs a flow pulse according to the flow rate of oil. The oil pumped up by the pump 2 is sent through a pipe 5 to a delivery unit 6 installed on the ceiling of the gas station. A refueling nozzle 8 is suspended from the delivery unit 6 by a refueling hose 7 so as to be able to move up and down. C) Move up and down between each stop position. The oil supplied from the pipe line 5 passes through the oil supply hose 7 and is discharged from the oil supply nozzle 8. The refueling nozzle 8 is also provided with a hand switch 9, and when an operator operates the hand switch 9, the refueling nozzle 8 is moved up and down between the standby position B and the refueling position C. On the other hand, a main lift switch 10 is provided on the wall of the gas station, and when an employee operates the main lift switch 10, the fuel nozzle 8 is moved up and down between the storage position A and the standby position B. Further, 11 is a controller that controls the oil supply device, and 12 is a display unit that displays the amount of oil supply.

Next, FIG. 2 is a sectional view showing the structure of the delivery unit 6. As shown in FIG. In this figure, 13 is a hose reel, and the refueling hose 7 is wound around this hose reel 13. Reference numeral 14 denotes a lifting motor, and the rotation of the lifting motor 14 is transmitted to the hose reel 13 via a reducer 15, causing the hose reel 13 to rotate forward (arrow Y ₁ direction in the figure) or reverse (arrow Y 1 in the figure). ₂ directions) Wind up or send out the refueling hose 7. Further, the hose reel 13 is rotated by rotationally driving the feed roller 16. This feed roller 16 is connected to the oil supply hose 7 together with the roller 17.
are clamped vertically and rotated as the hose reel 13 rotates to feed out the refueling hose 7.

Further, reference numeral 18 denotes _an arm portion having a large number of joints J ₁ , J ₂ . is rotatably attached, and the slider 19 is attached to the lower surface 6b inside the delivery unit 9 so as to be movable in the horizontal direction but immovable in the vertical direction. Rollers 20 and 21 are rotatably attached to the joints J ₂ and J ₃ of the arm 18, respectively, and guide members 22 and 23 are fixed near the other end 18b of the arm 18. Here, the roller 21 has a shape shown in FIGS. 3 and 4, and has a large number of holes 2 at regular intervals around the flange 21a.
4, 24... are drilled. A U-shaped lifting pulse transmitter 25 is provided so as to sandwich the periphery of the flange 21a. This lifting pulse transmitter 25 is provided with a light emitting device and a photodetector (not shown), and each time the hole 24 passes through this lifting pulse transmitter 25, a lifting pulse is output from the photodetector. In this case, the number of lifting pulses is proportional to the amount of rotation of the roller 21. This rising and falling pulse is amplified by an amplifier 26. The refueling hose 7 is hung on rollers 20 and 21,
Further, it is guided by guide members 22, 23 and a slider 19, and extends vertically downward from the delivery unit 6. In this case, the rollers 20 and 21 rotate as the refueling hose 7 moves up and down, and the lifting distance of the refueling hose 7 corresponds to the amount of rotation of the roller 20. Therefore, the lifting distance of the refueling hose 7 is
It is expressed by the number of lifting pulses output from the lifting pulse generator 25. Further, by moving the slider 19 along the lower surface 6b, the hanging position of the refueling hose 7 is moved.

Next, FIG. 5 is a block diagram showing the electrical configuration of the suspension type oil supply system, and parts corresponding to those in FIGS. 1 to 4 are designated by the same reference numerals. In the figure, numeral 30 is a flow rate pulse generator attached to the flow meter 4, and the flow rate pulses output from this flow rate pulse generator are supplied to the controller 11. The controller 11 calculates the amount of oil to be supplied from the input flow rate pulse and displays it on the display section 12. Also,
31 is a pump drive circuit, and the controller 11
The pump motor 3 is driven and controlled in response to instructions from the pump motor 3. The lifting pulses output from the lifting pulse generator 25 are supplied to the controller 11 and counted by the controller 11. Reference numeral 32 denotes a lift position setting device, which is used to set the storage position, standby position, and refueling position of the refueling nozzle 8, and supplies a setting signal to the controller 11. Also, 10a, 10b
are a main up switch and a main down switch respectively provided in the above-mentioned main up/down switch 10, and supply switch information operated by an operator to the controller 11. Also,
Reference numerals 9a and 9b are a hand up switch and a hand down switch provided in the hand switch 9, respectively, which are operated according to the work point and supply switch information to the controller 11. The controller 11 supplies a reverse rotation command to the elevation motor drive circuit 33 when the main up switch 10a and the manual up switch 9a are operated, and supplies a forward rotation command when the main down switch 10b and the manual down switch 9b are operated. Send out. The lifting motor drive circuit 33 operates the lifting motor 1 upon receiving a reverse rotation command.
4 to rotate and rotate the hose reel 13 in the reverse direction, while upon receiving a normal rotation command, the elevating motor 14 is rotationally driven to rotate the hose reel B in the normal direction. Reference numeral 34 denotes a preset oil supply setting device, which is operated by an operator to supply setting data and the like to the controller 11 when performing preset oil supply. On the other hand, the controller 11 includes a CPU (central processing unit) 40, a ROM (read only memory) 41,
It consists of a RAM (random access memory) 42 and an interface 43. Here, ROM4
1 and RAM 42 are provided with data areas E ₁ to E ₈ shown in FIGS. 6 and 7 for lifting control, and necessary data is stored in these areas E ₁ to _{E 8} . It is becoming more and more common. First, areas _E1 to _E7 are provided in the RAM 42, and in area _E1 , an example of whether normal refueling or preset refueling has been performed is stored. This is rewritten according to the refueling mode each time refueling is performed. Area _E2 is a work area for counting the up-and-down pulses.
In areas E ₃ , E ₄ , E ₅ , and E ₆ , the refueling nozzle 8 is located in storage position A→standby position B, standby position B→storage position A, standby position B→refueling position C, and refueling position C→standby position B. The number of rising and falling pulses Ca, Cb, Cc, and Cd required to rise or fall between
is set using the stop position setting device 32. That is, an operator actually visually moves the refueling nozzle 8 up and down between desired stop positions, and operates the stop position setter 32 each time it goes up or down. As a result, the number of elevating pulses counted during elevating and lowering is stored in areas _E3 to _E6 . In this case, the number of pulses differs when the vehicle is raised between the same stop positions and when it is lowered due to the relationship between the overtravel amount and the like. Therefore, we created separate areas for ascending and descending.

Further, in the area _E7 , the amount of oil to be press-injected when the oil supply hose 7 changes from a relaxed state to a tense state is stored as the pulse number Pk of the flow rate pulses. Next, an area E ₈ is provided in the ROM 41, and this area E ₈ contains correction data △Cc, △Cd for each of the standby position B and the refueling position C.
It is stored in correspondence with the number Pk of flow rate pulses stored in the area _E7 . To explain further, when the hydraulic pressure of the refueling hose 7 increases, the refueling hose 7 changes from a relaxed state to a tense state, causing a phenomenon in which the refueling nozzle 8 rises. Therefore, when lowering from the standby position B to the refueling position C in a state where the hydraulic pressure is low, it is necessary to take into account the above-mentioned increase and lower the valve even further than in the normal state. FIG. 8 shows this. That is, when lowering from the standby position B to the refueling position C in a state where the hydraulic pressure is low, the lowering distance is set to Cc+ΔCc, which is expressed by the number of lift pulses. As a result, the refueling nozzle 8 stops at a position (c) lower than the refueling position C, but by increasing the hydraulic pressure inside the refueling hose 7, the refueling hose 7 becomes tense and the refueling nozzle 8 rises. It becomes the normal refueling position C. In this case, the correction value ΔCc changes depending on the amount of oil that is press-fitted when the oil supply hose 7 changes from a relaxed state to a tense state. That is, when the amount of oil that is press-fitted is large, the tension increases and the correction value ΔCc becomes large, whereas when the amount of oil that is press-fitted is small, the tension is low and the correction value ΔCc becomes small. The amount of oil that is press-fitted varies depending on the type of oil supply hose 7, and
Moreover, even if the oil supply hose 7 is the same, it will change over time. Therefore, in this embodiment, as will be described later, this press-in amount is constantly monitored, and the latest press-in amount is stored in the area _E7 .

On the other hand, when preset refueling is performed at the refueling position C, when refueling is completed, the hydraulic pressure within the refueling hose 7 decreases, the refueling hose 7 relaxes, and the refueling nozzle 8 descends. Therefore, when raising from the refueling position C to the standby position B after performing preset refueling, it is necessary to take the above-mentioned drop into account and raise the refueling position more than usual.
FIG. 9 shows this. That is, when the preset refueling is completed, the refueling nozzle 8 descends from the refueling position C and is located at (c), so the amount of descent △Cd is added to the rising distance Cd from the refueling position C to the standby position B, and Cd + Let △Cd be the climbing distance. This correction value ΔCd varies depending on the amount of oil injected, as in the case of the correction value ΔCc described above.

The operation of the suspension type refueling device having the above configuration will be explained using the flowchart shown in FIG. 10.
At steps SP1, SP2, SP3, and SP4, the CPU 40 switches the main up switch 1, respectively.
0a, the main lowering switch 10b, the manual raising switch 9a, and the manual lowering switch 9b are respectively operated at the corresponding lifting and lowering positions,
This step SP1,
A loop _L1 consisting of SP2, SP3 and SP4 is circulated. When the main lift switch 10a is operated while circulating through the loop _L1 , an operation signal is supplied to the CPU 40 via the interface 43, the judgment at step SP1 becomes YES, and the process moves to step SP5. CPU40 is this step SP5
is stored in area _E4 . Move pulse number Cb to work area, then step SP
6, a reverse rotation command is supplied to the lifting motor drive circuit 33. Then, the lifting motor 14 rotates, the hose reel 13 reverses, the refueling hose 7 is rewound, and the refueling nozzle 8 begins to rise. At the same time, the roller 21 rotates, and a lifting pulse is output from the lifting pulse generator 25, and is transmitted via the interface.
It is supplied to the CPU 40. CPU 40 is a step
In step SP7, these rising and falling pulses are counted and written in area _E2 , and then in step SP8 it is determined whether the counted value in area _E2 and the number of pulses Cb transferred to the work area are the same.
If they are not the same, the process returns to step SP6, while if they are the same, a stop command is output to the lifting motor drive circuit 33. Then, the lifting motor 14 stops, and the refueling nozzle 8 stops rising. The CPU 40 then returns to loop _L1 .

Next, when the main up switch 10b is operated while loop _L1 is circulating, the step
The judgment at SP2 becomes YES, and the process moves to step SP10. In this step SP10, the CPU 40
The number of pulses Ca stored in area _E3 is transferred to the work area, and then the process moves to step SP6, where a forward rotation command is supplied to the lifting motor drive circuit 33.
Then, the hose reel 13 rotates normally and the refueling nozzle 8 begins to descend. Next, the CPU 40 counts the ascending and descending pulses in step SP12 and writes them into the area _E2 . Next, in step SP13, it is determined whether the count value in area _E2 and the number of pulses Ca transferred to the work area are the same, and if they are not the same, the process returns to step SP11.
If they are the same, the process moves to step SP14, where a stop command is supplied to the lifting motor drive circuit 33, and loop L ₁
Return to This stops the refueling nozzle from rising.

Next, when the hand lift switch 9a is operated while loop _L1 is being circulated, step SP
The judgment in step 3 becomes YES, and the process moves to step SP15.
The CPU 40 supplies a stop command to the pump drive circuit 31 in step SP15. Then, the pump motor 3 stops. In this case, after preset lubrication, the pump motor 3
It is already in a stopped state. Next, CPU4
0, the program moves to step SP16, reads the contents of area _E1 , and determines whether or not the most recently performed refueling was preset refueling. If it is preset lubrication, proceed to step SP17, first read out the number of pulses Cd from area _E6 , and correspondingly read out the number of correction pulses △ stored in area _E8 .
Add Cdk to the number of pulses Cd stored in the work area. On the other hand, if the determination at step SP16 is NO, that is, if normal refueling is performed, the process moves to step SP18, where the number of pulses Cd is read out from area _E6 and transferred to the work area. Next, in step SP19, the CPU 40
The refueling nozzle 8 is raised, and in step SP20, the count value of the lifting pulse is written in the area E2.Then, in step _SP21 , the count value of the lifting pulse is written in the area _E2 .
The count value stored in the work area is compared with the number of pulses Cd + △Cdk or Cd stored in the work area, and if they are not the same, the process returns to step SP19, while if they are the same, the process proceeds to step SP22 and the refueling nozzle 8 is After stopping the rise, return to loop L ₁ .

Next, when the manual lowering switch 9b is operated while loop _L1 is being circulated, step SP
The judgment in step 4 becomes YES, and the process moves to step SP23.
In this step SP23, the CPU 40 determines whether or not the previous refueling was preset refueling, and if it was preset refueling,
Proceeding to step SP24, first read out the pulse number Cc from area _E5 and move it to the work area. Next, the number of pulses Pk is read from the area _E7 , and the corresponding number of correction pulses ΔCck stored in the area _E8 is added to the number of pulses Cc stored in the work area. On the other hand, step SP23
If the judgment is NO, read out the number of pulses Cc from area _E5 and move it to the work area.

Next, the CPU 40 lowers the refueling nozzle 8 in step SP26, writes the count value of the lifting pulse in the area E2 in step SP27, and then writes the count value of the lifting pulse in the area _E2 in step SP28.
The count value stored in E ₂ and the number of pulses stored in the work area Cc + △Cck or Cc
If they are not the same, the process returns to step SP26, while if they are the same, the process proceeds to step SP29.
Stop the lowering of the refueling nozzle 8. Next, CPU4
0 moves to step SP30 and pump drive circuit 3
Supply a drive command to 1. Then pump motor 3
rotates, and the pump 2 is driven.

As a result, if the hydraulic pressure in the oil supply hose 7 is low, oil is pressurized and the flow rate pulse generator 30 outputs a flow rate pulse. CPU40
counts these flow rate pulses in steps SP31 and SP32, and writes the counted value to area _E7 in step SP33. Then CPU40
At step SP34, write normal refueling in area _E1 , and then at step SP34.
At 35, refueling processing is performed. In this lubrication process, if preset lubrication is to be performed, the fact that it is preset lubrication is written in area _E1 . Then, when the refueling process is finished, the loop
Return to L ₁ .

[Effect of idea]

As explained above, according to this invention, there is provided a lift pulse generator that outputs a number of lift pulses corresponding to the lift distance of the refueling nozzle, and a pulse number of the lift pulses corresponding to the distance between each lift position. a storage means for storing stored information; a correction means for correcting the stored number of pulses based on the level of hydraulic pressure in the refueling hose; and a correction means for correcting the stored number of pulses based on the stored number of pulses or the corrected number of pulses; For example, since the control means for driving and controlling the lifting source using the lifting pulse output from the pulse generator is provided, the standby position and the refueling position can be kept constant at all times. This eliminates the possibility of the standby position lowering and the refueling nozzle colliding with the car, or the refueling position being raised and the refueling nozzle not being able to reach the car, and causing inconvenience to customers. .

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a suspension type refueling device according to an embodiment of the invention, FIG. 2 is a sectional view showing the structure of a delivery unit 6, and FIGS.
The figure shows a roller 21 and a lifting pulse transmitter 2, respectively.
5 is a block diagram showing the electrical configuration of the suspended oil supply system, FIGS. 6 and 7 are conceptual diagrams showing the configuration of the storage area, and FIGS. 8 and 9 The figures are diagrams for explaining the deviation of the lifting position when the refueling nozzle is raised and lowered between the standby position and the refueling position, and Figure 10 is a flowchart for explaining the operation of the suspended type refueling device. be. 6...Delivery unit, 7...Refueling hose,
8... Refueling nozzle, 14... Lifting motor (lifting source), 25... Lifting pulse transmitter, 40... CPU
(correction means, drive control means), 41...ROM, 4
2...RAM (41 and 42 above are storage means), A...
...Storage position, B...Standby position, C...Refueling position.

Claims (1)

[Scope of utility model registration request] By rotating the lifting source installed in the delivery unit at the height of the gas station in the forward or reverse direction to send out or rewind the refueling hose, the refueling nozzle attached to the end of the refueling hose is raised and lowered, and In a suspended refueling device that moves between vertical positions, the lifting pulse transmitter outputs a number of lifting pulses corresponding to the amount of rotation of a rotating body that rotates as the refueling hose is moved by feeding or rewinding. , an oil amount measuring and storing means for measuring and storing the amount of oil required to fill the oil supply hose to a tensioned state when starting refueling from a relaxed state in which internal hydraulic pressure has decreased due to preset oiling; A lifting pulse storage means in which a number of lifting pulses corresponding to a distance between predetermined lifting positions is stored, and a correction value for the number of lifting pulses stored in the lifting pulse storage means corresponds to the oil amount. a correction pulse storage means which is stored in advance, a preset refueling determination means for determining whether the latest refueling end was due to preset refueling, and a preset refueling determining means that determines that the preset refueling has ended. In this case, when a refueling hose that has become relaxed due to preset refueling is moved up and down between predetermined up and down positions, a corresponding correction pulse is generated from the correction pulse storage means based on the oil amount stored in the oil amount measurement storage means. A correction value is selected, and the number of lifting pulses stored in the lifting pulse storage means is corrected using the selected correction value, and the number of lifting pulses corrected by the correction value is calculated from the lifting pulse oscillator. A suspension type refueling device comprising: control means for driving and controlling the elevating source so that the number of elevating pulses to be output matches the number of elevating pulses outputted.