JPS6159937B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refueling device, in which a detection member that rotates in proportion to the rotation of a hose reel is detected without contact by a detector, and the number of detections is counted to determine the amount of rotation of the hose reel. By comparing this with the hose reel rotation amount corresponding to a predetermined hose elevation position and controlling the drive of the hose reel,
It is an object of the present invention to provide a refueling device configured to always reliably control the lifting and lowering position of a hose.

Generally, a refueling device is known in which a refueling hose is wound and stored on a hose reel in a delivery unit provided on the ceiling of a refueling station, and the hose reel is driven to rotate during refueling to let out the refueling hose.

However, the conventional refueling method described above uses a hose reel,
A number of cams corresponding to the lifting and lowering positions of multiple hoses are fixed to a rotating shaft such as a gear connected via a reducer, and a hose reel rotating position detection device is installed near these cams to open and close according to the rotation of these cams. This eliminates the particular disadvantage of a refueling device configured to include micro-switches for detecting the position of the hose, that is, for detecting the lifting and lowering position of the hose, and controlling the hose reel drive motor by opening and closing these micro-switches. That is, in the above-mentioned refueling device, a cam and a micro switch are provided respectively corresponding to the lifting and lowering positions of one hose, which not only complicates the overall configuration, but also
Normally, in the current situation where the lifting and lowering positions of each hose differ depending on the installation conditions of the refueling equipment at each filling station, workers are required to mutually adjust the fixed positions of the respective cams relative to the rotating shaft according to the installation conditions. It requires skill and effort. Moreover, the actuator of the micro switch is always in contact with the rotating part of the cam, which not only tends to cause detection errors due to mechanical play, but also prevents the cam from attaching if the refueling nozzle is suddenly pulled. As the position shifts, the mechanical contact parts will wear out after long-term use, and the cam itself will also wear out, causing the hose to move up and down, causing the lowering switch's hanging strap to operate in the standby position. There is a risk that the refueling nozzle may come into contact with vehicles, etc., making it easy to break down, and it is not easy to maintain because the cam and micro switch are installed in the delivery unit at a high location at the refueling station. There were flaws.

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings. 1st
The figure is a schematic configuration diagram of an embodiment of the refueling device, Figures 2A and B are a vertical cross-sectional view of the delivery unit section and a front view of the hose reel section, respectively, and Figure 3 is an embodiment of the relay circuit constituting the control circuit. The circuit diagram is shown.

In FIGS. 1 and 2, a building 2 is built at a suitable location on a gas station site 1, and above the building 2, a ceiling (or beam, etc.) 3 extends horizontally over a gas service area. Reference numeral 4 denotes a metering unit installed in a place that does not interfere with the movement of vehicles within the premises 1, for example, in the building 2. Inside the metering unit, there are pumps 7 installed in the middle of a fixed pipe 6 communicating with an underground tank 5; A pump driving motor 8, a flow meter 9, a pulse transmitter 10 that transmits a number of pulse signals proportional to the flow rate measured by the flow meter 9, and the like are provided. The fixed pipe 6 rises inside the building 2 and extends along the ceiling 3, reaching the delivery unit 11.

The transmission output of the pulse transmitter 10 is transmitted to the indicator 13 via the electric wire 12.
3, the flow rate is displayed. Further, a switch box 14 is provided at a height within the reach of a worker, for example, on a wall of the building 2. switch box 14
There are a hose hoisting switch button 15 and a hose feeding switch button 1 that constitute a lift switch.
6 is provided. 17 is a relay unit,
It has a built-in relay circuit that constitutes a control circuit that will be described later in conjunction with FIG. 3, and controls the operation of the hose reel drive motor in the delivery unit (hose reel device) 11, the operation of the pump drive motor 8, etc. .

18 is a flexible refueling hose, which is attached to the hose reel 1 in the delivery unit 11 as shown in FIG. 2A.
9 is wound, and a refueling nozzle 2 is installed at the bottom end of the coil.
0 is set. A switch box 21 is provided near the fuel nozzle 20. The switch box 21 is provided with a switch button 22 and a switch 25 which is opened and closed by the rotation of a lever 24 having a hanging string 23 at its tip, and constitutes a lift switch. An electric wire 26 connected to the switches 22 and 25 extends into the delivery unit 11 along the refueling hose 18.

The rotating shaft 27 of the hose reel 19 is hollow, as shown in FIG. 2A, and communicates with the fixed pipe 6, and also communicates with one end of the oil supply hose 18. Reference numeral 28 denotes a motor whose operation is controlled as described later, and its rotation is reduced by a reducer 29 and transmitted to the hose reel rotating shaft 27 via a chain 30.

Reference numerals 31 and 32 denote members to be detected, and a case will be described below in which photoelectric position detectors such as photomarkers are used as the members to be detected 31 and 32. The photomarkers 31 and 32 are constructed by applying fluorescent paint having a light-reflecting effect to appropriate positions on the outer periphery of the hose reel 19 in different sizes and approximately rectangular shapes. Further, the large photomarker 31 and the small photomarker 32 are placed adjacent to each other to such an extent that they can be optically distinguished. Reference numerals 33, 34, and 35 are Hole sensors for detecting the amount of rotation of the hose reel in 1/3 rotation increments.
Reference numerals 34 and 35 are photo sensors (detectors) for detecting the upper end position, the standby position, and the refueling position, which are predetermined hose lifting and lowering positions, respectively, and the hose reel 1
They are arranged opposite to each other with a predetermined distance from each other. That is, each photo sensor 33, 34, 35 is provided facing and spaced apart from photo markers 31, 32 provided at appropriate positions on the outer periphery of hose reel 19, and detects rotational displacement of photo markers 31, 32 without contact. Each photo sensor 33, 34, 35 detects when the photo marker 31, 32 passes through its front surface, and outputs continuous pulses of two different lengths, large and small.

36 is a marker identification circuit, and the photo sensors 33, 3
Photomarkers 31, 3 passing through the front parts of 4, 35
2, and thereby determine the rotation direction of the hose reel 19, that is, whether it is the hose winding direction or the hose feeding direction.

37 is a waveform shaping circuit, and each photo sensor 33, 3
4 and 35 detect photomarkers 31 and 32,
Two consecutive pulses are waveform-shaped and output as one pulse.

38 is an up/down counter, which is supplied with signals from the marker identification circuit 36 and waveform shaping circuit 37, and counts how many times the hose reel 19 has rotated in the hose winding direction or the hose feeding direction. Therefore, the up/down counter 38 calculates the number of rotations of the hose reel 19 based on the detection outputs from the respective photosensors 33, 34, and 35. That is, in the case of this embodiment, the hose reel 19 rotates approximately 2 2/3 times when the refueling hose 18 is rotated from the most wound up state.
8 is configured to reach the most extended state, and when the rotation of the hose reel 19 is within one rotation, the terminal ₃₈₁ outputs a signal, and the hose reel 1
The terminals 38 ₂ and 38 ₃ output signals depending on whether the rotation of the rotor 9 is within two revolutions or within three revolutions, respectively.

39, 40, 41 are waveform shaping circuits connected to the photosensors 33, 34, 35, respectively;
Two consecutive pulse signals from the photosensors 33, 34, 35 are waveform-shaped and supplied as one pulse to the corresponding AND gate circuits 42, 43, 44.

AND gate circuits 42, 43, and 44 connect the output pulses from the waveform shaping circuits 39, 40, and 41, respectively, and the terminals 381, 38 of the up/down counter ₃₈ , respectively.
₃₈₂ and ₃₈₃ , respectively, and outputs the switch _S1 closing signal, the switch _S2 closing signal, and the switch _S3 closing signal as a logical product. That is, in the AND gate circuits 42, 43, 44, the photosensor 3 input via the waveform shaping circuit 37
3, 34, and 35 and counting signals input from the terminals ₃₈₁ , ₃₈₂ , and ₃₈₃ of the up/down counter 38, the hose is moved to a predetermined lifting/lowering position consisting of the upper end position, standby position, and refueling position. A comparison means is configured to detect that the amount of rotation of the hose reel 19 corresponds to the amount of rotation of the hose reel 19.

Further, 47 is a drive circuit which operates the lift switch 1.
The motor 28 is driven and controlled to rotate the hose reel 19 in the hose winding direction or the hose reeling direction by operating the switches 5, 16, 22, and 25, and the hose lifting and lowering stop position is detected by the AND gate circuits 42, 43, and 44. As soon as the signal is input, motor 2
8 is configured to stop. Note that the up-down counter 38 and the AND gate circuit 4
2, 43, 44 and a drive circuit 47 constitute a control circuit.

Next, we will discuss the operation and operation of the above-mentioned component devices in the third section.
The relay circuit shown in the figure will also be explained.

When the gas station is not in operation (for example, at night or on holidays), the refueling hose 18 is fully wound up on the hose reel 19, and the refueling nozzle 20 is raised close to the delivery unit 11, as shown by the solid line in FIG. It's dark. In this state, the photomarkers 31 and 32 are facing the photosensor 33 for detecting the upper end position. Therefore, when the gas station started operating,
First, press the switch button 16.

By pressing the switch button 16, the switch 16a shown in FIG. 3 is closed, and the relay _R1 is closed and operated. As a result, even if relay switch _r1-1 is closed and switch 16a is closed, relay _R1 is self-maintained in its operating state. Further, the relay switch _r1-2 is closed by the operation of the relay _R1 , and the motor 28 rotates in the forward direction.

The hose reel 1 is rotated by the forward rotation of the motor 28.
9 is also rotated in the forward direction (counterclockwise in FIG.
descends. When the hose reel 19 rotates approximately 11/3 times after the refueling nozzle 20 begins to descend, the refueling nozzle 20 reaches the standby position approximately 1.8 m above the ground, and the photo markers 31 and 32 are activated by the photo sensor 3 for detecting the standby position.
Opposed to 4. As a result, the pulse signal from the waveform shaping circuit 34 connected to the photosensor 34 passes through the AND gate circuit 43, which is opened by the signal from the terminal ₃₈₂ of the Azop down counter circuit 38, and the AND gate circuit 43 switches the switch S. ₂ Close signal is output.

Closing switch S ₂ causes relay R ₂ to self-hold via relay switch r _2-1 , so that relay switch r _2-2 is opened. As a result, relay R ₁ is deactivated and switch r _1-2 of relay R ₁ is opened.
As a result, normal rotation of the motor 28 is stopped. Accordingly, the hose reel 19 also stops rotating, and the nozzle 20 is stopped from descending at the standby position.

The standby position of the nozzle 20 is such that the nozzle 20 does not obstruct the passage of vehicles and the operator's hand cannot directly reach the nozzle 20 but is at a height such that the handle of the hanging string 23 can be reached, for example, the nozzle 20 and The location is such that the distance from the ground is 1.8m. During operating hours of the gas station, the nozzle 20 is in the standby position.

Therefore, when refueling a car or the like, the operator pulls the hanging cord 23. This causes the lever 24 to rotate, the switch 25 to close, and the relay to close.
_R3 is closed and operates. The operation of relay _R3 closes relay switch _r3-1 and motor 28 rotates in the forward direction again. As a result, the refueling hose 18 is further extended, and the nozzle 20 is further lowered. On the other hand, along with the operation of relay _R3 , the previous oil supply amount display value of indicator 13 is reset to zero by an appropriate circuit.

Here, the switch 25 is closed only while the hanging string 23 is being pulled, and is opened when the hanging string 23 is released. Therefore, the nozzle 20 is lowered by pulling the hanging string 23 as described above, and when the nozzle 20 has descended to the most suitable position for refueling, when the hanging string 23 is released, the switch 25 is opened and the relay is activated. R ₃ is deactivated, and as a result, relay switch R _3-1 opens and motor 28
stops rotating, so that the nozzle 20 stops descending at its most desirable refueling position, as shown by the two-dot chain line in FIG.

On the other hand, when the hanging cord 23 is pulled to close the switch 25, the relay _R3 is activated, the relay switch _R3-3 is closed, and the relay _R8 is activated. _R8 is self-held via relay switch _R8-1 . Therefore, at the same time as pulling the hanging string 23, the relay
The switch _r8-2 of _R6 is closed, and the motor 8 is energized to start the pump 7.

Then, the refueling operator grasps the nozzle 20 and opens the nozzle valve. As a result, the oil in the underground tank 5 is pumped up by the pump 7, fed through the fixed pipe 6 and the hose 18, and then fed through the nozzle 20 into the fuel tank of an automobile or the like. The amount of oil supplied every moment during this oil supply is measured by a flow meter 9, and an indicator 13 is measured by a signal from a pulse transmitter 10.
will be displayed.

Upon completion of the refueling operation, after closing the nozzle valve of the nozzle 20, the switch button 22 of the switch box 21 is pressed. As a result, the switch 22a
is closed, relay R ₇ is activated and the relay switch is activated.
r _7-1 is closed and relay R ₇ is self-holding.

Activation of relay _R7 closes relay switch _r7-2 , causing motor 28 to rotate in the opposite direction. As a result, the hose reel 19 is rotated in the opposite direction (clockwise in FIG. 2B) to wind up the refueling hose 18. At the same time, relay switch _r7-3 is opened and relay _R8 is deactivated and released from its self-holding state. Relay switch r _8-2 due to deactivation of relay R ₈
is opened, the motor 8 for driving the oil supply pump stops, and the operation of the pump 7 also stops.

As the motor 28 rotates in the opposite direction, the refueling hose 18 is wound up and the nozzle 20 is raised from the refueling position to the standby position. S ₂ is closed.

Closing switch S ₂ causes relay R ₂ to self-hold via relay switch r _2-1 , so that relay switch r _2-3 is opened. As a result, relay _R7 is deactivated and relay switch _r7-2 is opened, thereby stopping the motor 28 from rotating in reverse. As a result, the hose reel 19 also stops rotating, and the nozzle 2
0 is stopped from rising at the standby position.

When refueling next time, it is sufficient to pull the hanging string 23 again, and the subsequent operation is exactly the same as described above.

Next, to end the operation of the gas station, the switch button 15 is pressed. As a result, the switch 15a
is closed, relay _R5 is activated, and the relay switch is activated.
r _5-1 is closed and relay R ₅ is self-held, and relay switch r _5-2 is closed to further rotate the motor 28 in the opposite direction. By rotating the motor 28 in the opposite direction, the hose 18 is wound onto the hose reel 19, and the nozzle 20 is further raised to the standby position.

When the nozzle 20 reaches the upper end position near the delivery unit 11, the photomarkers 31 and 32 face the upper end position detection photosensor 33, and the AND gate circuit 42 is opened by a signal from the terminal ₃₈₁ of the up/down counter 38. The pulse signal from the waveform shaping circuit 39 passes through, and a switch _S1 closing signal is output. As a result, switch S ₁ closes and relay R ₆ becomes self-holding. Activation of relay R ₆ opens relay switch r _6-2 and relay R ₅
is considered inactive. This will cause the relay switch to
_r5-2 is opened and the motor 28 stops rotating in the reverse direction, so the hose reel 19 is connected to the photomarkers 31 and 32.
Hoisting of the hose 18 is stopped at a position facing the photosensor 33. As a result, the refueling nozzle 20 is raised to the upper end position and suspended at that position.

In this way, the above-mentioned configuration device includes the hose reel 19
Since the rotational position of the hose reel 19 is detected and controlled without contact, the rotation of the hose reel 19 can be controlled more reliably than the conventional contact type. Furthermore, when the photomers 31 and 32 pass in front of the photosensors 33, 34, and 35 at the upper end position, standby position, and refueling position of the refueling nozzle 20,
Since the photosensors 33, 34, and 35 optically detect this, it is preferable for explosion-proofing in gas stations that handle flammable gasoline, light oil, and the like.

In addition, in the above description, when the refueling nozzle 20 is lowered from the standby position to the refueling position, the refueling nozzle 2
Although the switch 25 was opened when the fuel hose 18 was lowered to a position suitable for refueling, the switch 25 may continue to be closed and the refueling hose 18 may be extended to a position where it cannot be extended any further. In such a case, the hose reel 19 has rotated 2 2/3 times when the refueling nozzle 20 has descended to the lowest position, and the photomarkers 31 and 32 face the photo sensor 35 for detecting the refueling position. As a result, a switch _S3 closing signal is output from the AND gate circuit 44,
Switch _S3 closes. When switch _S3 is closed, relay _R4 is self-held via relay switch _r4-1 , relay switch _r4-2 is opened, and although switch 25 is in the closed state, relay _R3 is inactive. Become.

When relay R ₃ is deactivated, relay switch r _3-1
is opened, the motor 28 stops normal rotation and the hose reel 19 automatically stops feeding out the hose. Therefore, the refueling nozzle 20 is lowered and stopped at the lowest position with a predetermined distance left from the ground without contacting the ground.

Furthermore, in the above description, the refueling nozzle 20 in the refueling position is once raised to the standby position and then raised to the upper end position upon completion of operation. Button 15 may also be closed. In that case, relay _R5 is energized via switch 15a and self-held via relay switch _r5-1 , so that relay switch _r5-2 is closed. This causes the motor 28 to rotate in the opposite direction,
The refueling hose 18 is rolled up.

When the refueling hose 18 is wound up to the position where the photomarkers 31 and 32 of the refueling hose 18 face the photo sensor 34 for detecting the standby position, the switch S ₂ is closed as described above, but the relay R ₅ is closed due to the circuit configuration. Maintains self-holding state regardless of whether _S2 is opened or closed. Therefore, even if the refueling hose 18 is hoisted up to the standby position, the motor 28 continues to be energized via the relay switch _r5-2 , so that the refueling hose 18 is hoisted all at once to the upper end position without stopping at the standby position.

The refueling hose 1 reaches the upper end position where the photo markers 31 and 32 face the photo sensor 33 for position detection.
8 is wound up, switch S ₁ closes and relay R ₆ operates as before. As a result, relay switch _r6-2 is closed, relay _R5 is deactivated, relay switch _r5-2 is closed, and motor 28 is stopped.

Here, for example relay R ₁ relay switch r _1-3
is opened by closing the switch button 16 and lowering the nozzle 20, so that the refueling hose 1
Even if you accidentally close the refueling hose winding switch button 15 while lowering the nozzle 20 by lowering the nozzle 20, the relay _R5 will not operate and the forward rotation relay switch _{R1-2 will} not operate. If the reverse relay switch R5-2 and the reverse relay switch _R5-2 are closed at the same time, such inconvenience will not occur. The device of the present invention has a circuit configuration in which appropriate relay switches are provided in addition to the relay switches _r1-3 to prevent erroneous energization of the motor 28 and protect the motor 28.

It should be noted that the present invention is not limited to the above embodiment, and for example, as shown in FIG. 4A, a hose reel 1
The only photo marker provided at 9 is the large photo marker 45, and a switch 46 is provided in front of the up/down counter circuit 38, which opens and closes in conjunction with the lifting and lowering operations. The rotational position of the hose reel 19 may be detected by identifying the direction and switching the up-down counter circuit 38. In that case, the marker identification circuit 36 and waveform shaping circuit 37 used in the embodiment described above are unnecessary, and the circuit configuration of the entire device becomes simple.

In addition, in the above embodiment, the hose reel 19 is
Although the refueling hose 18 is wound up to the upper end position when rotated by 2/3, the number of rotations of the hose reel 19 varies depending on the length of the refueling hose 18, the diameter of the hose reel 19, and the like. Therefore, for example, when the hose reel 19 is rotated four times in total, the refueling hose 1
8 from the refueling position to the standby position, and when the refueling hose 18 is rotated a total of 8 times, the refueling hose 18 can be wound up from the refueling position to the upper end position, the hose reel 19 rotates 4 times,
An up-down counter circuit configured to output a signal from a corresponding terminal every eight rotations may be used. In this case, the number of photosensors may be one, and the waveform shaping circuits 39, 40, 41 and the AND gate circuits 42, 43, 44 may be omitted. That is,
The configuration may be a combination of the photosensor 33 shown in FIG. 4B and an up-down counter 38 having both counting and comparison functions. In this way, when the amount of rotation of the hose reel 19 is measured with only one photosensor 33 and the height position of the refueling nozzle 20 is detected to control the amount of feeding of the refueling hose 18,
A plurality of photomarkers of the same size may be provided at the same pitch intervals on the outer periphery of the hose reel 19, and the height position of the refueling nozzle 20 may be detected by counting the number of photomarkers. In addition, for example, 10 photomarkers are arranged at equal intervals all around the outer circumference of the hose reel 19, and when the photomarker is 0, it is at the upper end position, when 40 photomarkers are counted, it is at the standby position, and when 80 photomarkers are counted. When the refueling position is detected, the refueling position is detected. When counting the number of photomarkers that have passed in front of the photo sensor 33 according to the rotational position of the hose reel 19 in this way, the output signal output from the up-down counter 38 can be set to an arbitrary number of counts. As a result, the height position of the refueling nozzle 20 can be variably adjusted as desired.

Furthermore, in the above embodiments, the number of photosensors is not limited to three or one; for example, only two photosensors for detecting the upper end position and the standby position may be used, or four or more photosensors may be used. A configuration may also be adopted in which a photo sensor is provided to more precisely control the vertical position of the refueling hose.

Furthermore, a configuration may be adopted in which only one photo sensor is used, and the photo markers are provided on another rotating body that rotates in proportion to the rotation speed of the hose reel along with the rotation of the hose reel in accordance with the number of hose lifting/lowering stop positions.

Furthermore, the means for detecting the rotational position of the hose reel does not rely on photomarkers and photosensors; for example, a combination of a magnetic body provided on the hose reel and a magnetic sensor that opens and closes without contact depending on the proximity and separation of the magnetic body. or a combination of a conductor and a metal sensor, or a capacitive detection unit that changes the capacity as the hose reel rotates. Any other device may be used as long as it can detect positional changes without contact.

The refueling system according to the present invention includes a delivery unit installed at a high location at the refueling station, and the delivery unit includes:
A hose reel is wound with a refueling hose having a refueling nozzle at the tip, and the hose reel is wound with a hose so that the refueling nozzle is raised and lowered between predetermined hose lifting positions consisting of the upper end, standby, and refueling positions. a motor rotationally driven in a taking direction or a hose feeding direction; a detected member provided to rotate in proportion to the rotation of the hose reel;
a detector that is provided opposite to the detected member and detects the opposed detected member without contact;
Between the detector and the motor, the detection pulse of the detected member output from the detector corresponds to the rotation direction of the hose reel by rotation of the hose reel in a hose winding direction or a hose payout direction. The count signal output from the counting means is input, and the count signal is compared with the amount of hose reel rotation corresponding to a predetermined hose lifting position, and when the two match, the predetermined hose is Comparing means for outputting a lifting position detection signal; and a lifting switch provided for receiving the predetermined hose lifting position detection signal from the comparing means and instructing the refueling nozzle to move up and down between predetermined hose lifting positions. An operation signal is input, and based on the input of the operation signal, the motor is driven in forward or reverse rotation to rotate the hose reel in the hose winding direction or in the hose reeling direction. A motor drive control means that stops the motor to stop the rotation of the hose reel is connected via a control circuit that has the motor drive control means, so that the hose lifting position can be detected without contact, so the hose lifting position is extremely reliable. Therefore, it is possible to effectively prevent erroneous detection due to machine play or cam play, as in the conventional hose elevation position control device using a cam and a micro switch, which can cause malfunctions. For example, when the refueling nozzle is lowered, the refueling nozzle collides with the ground,
The refueling nozzle does not collide with the delivery unit when ascending, and even in the standby position, there is no problem such as the refueling nozzle obstructing vehicle traffic or inconveniences such as the hanging strap of the lowering switch being inoperable. Furthermore, since the rotation amount detection member is provided on the hose reel, there is no need for a special reduction gear mechanism to decelerate the rotation of the hose reel, as in the above-mentioned conventional hose elevation position control device, and the entire device can be greatly simplified. It can be easily configured and detects the rotational displacement of the detected member without contact, so it can detect the vertical position of the refueling nozzle according to the length of the refueling hose unwound from the hose reel without contact. ,
This is convenient for explosion-proofing at gas stations, etc. that handle flammable fluids, and also eliminates the risk of false detection due to the displacement of the cam mounting position when the refueling nozzle is suddenly pulled, unlike conventional methods. do not have. Furthermore, since there are no mechanical failures, durability is improved, and the maintenance period for the hose lifting position detector in the delivery unit can be postponed compared to before, reducing maintenance work.In addition, the rotation amount of the hose reel can be calculated and It has features such as being able to control the height position of the refueling nozzle with high precision at each moving position by comparing the rotation amount corresponding to a predetermined vertical position of the refueling nozzle.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment of a refueling device according to the present invention, and FIGS. 2A and 2B are a longitudinal sectional view of a delivery unit portion and a front view of a hose reel portion, respectively.
FIG. 3 is a circuit diagram of one embodiment of the relay circuit, and FIGS. 4A and 4B are a front view of a modified example of the hose reel portion and a circuit diagram of a main part of a modified example of the relay circuit, respectively. 11... Delivery unit, 17... Relay unit, 18... Refueling hose, 19... Hose reel, 31, 32... Photo marker, 33, 34,
35...Photo sensor, 36...Marker identification circuit,
37... Waveform shaping circuit, 38... Up/down counter, 39, 40, 41... Waveform shaping circuit,
42, 43, 44...AND gate circuit.

Claims (1)

[Claims] 1. A delivery unit is provided at a high location at a gas station, and the delivery unit includes a hose reel around which a refueling hose having a refueling nozzle at the tip is wound, and a hose reel with which the refueling nozzle is positioned at a predetermined position consisting of the upper end, standby, and refueling position. a motor that rotationally drives the hose reel in a hose winding direction or a hose reeling direction so as to raise and lower the hose between lifting and lowering positions, and a detected member provided to rotate in proportion to the rotation of the hose reel; A detector is provided to face the detected member and detect the opposed detected member without contact, and the detector and the motor are connected in the hose winding direction of the hose reel or in the hose winding direction. A counting means for counting detection pulses of the detected member outputted from the detector by rotation in the feeding direction in correspondence with the rotating direction of the hose reel, and a counting signal outputted from the counting means is inputted, a comparison means that compares the count signal with a hose reel rotation amount corresponding to a predetermined hose elevation position, and outputs the predetermined hose elevation position detection signal when the two match; A detection signal is input, and an operation signal of a lift switch provided for instructing the refueling nozzle to move up and down between predetermined hose lift positions is input, and based on the input of the operation signal, the hose reel is moved in the hose winding direction. or driving the motor forward or reverse to rotate in the hose feeding direction;
and motor drive control means for stopping the motor in order to stop rotating the hose reel in response to input of the predetermined hose elevation position signal, the oil supply device being connected via a control circuit.