JPH0139958B2 - - Google Patents

Description

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

Conventionally, as this type of refueling device, a hose elevator operated by a motor is provided at a high location of the refueling station such as a ceiling, a canopy, or a beam. There is known a refueling device which is provided with a position detection switch for detecting the vertical position of the refueling nozzle, and a hand switch disposed in the middle of the refueling nozzle or hose to operate the hose elevator and raise or lower the refueling nozzle to a predetermined position. ing. Then, by operating the lowering switch among the hand switches, the motor rotates downward so that the refueling nozzle located at the standby position, for example, 1.8 m above the ground, descends to the refueling position where the vehicle should be refueled. When the motor reaches the refueling position, the lower end of the position detection switches is activated to stop the motor. Conversely, by operating the lift switch, the motor rotates upward until the refueling nozzle in the refueling position reaches the standby position, and when the refueling nozzle reaches the standby position, the upper end switch of the position detection switches operates to stop the motor. It works to stop it.

However, in the case of the above conventional technology,
For example, if the lower end switch fails or does not operate due to poor operation even when the lowering switch is operated, the motor will not stop even when it reaches the refueling position and will continue to rotate downward. As a result, when the hose elevator is a hose reel, the hose is completely unwound, and then the hose is reversely wound and raised, and there is a risk that the hose may break and cause a breakage accident. In addition, if the hose elevator is a pair of hose lifting rollers that rotate while holding the hose, the rollers continue to rotate toward the hose feeding side even after the hose is all fed out, and the joint between the fixed pipe and the hose is There was a risk of damage. On the other hand, if the lower end switch does not operate even when the lift switch is operated, there is a risk that the refueling nozzle connected to the end of the hose will collide with the case of the hose elevator, causing damage to the refueling nozzle and hose. Ta.

The present invention improves the drawbacks of the prior art and provides a refueling device that stops the motor of the hose elevator when it is determined that the position detection switch provided on the hose elevator is malfunctioning. purpose.

In order to achieve this object, the present invention provides a hose elevator operated by a motor at an elevated location of a gas service station, a hose having a refueling nozzle at its tip, and a hose having a refueling nozzle at the tip of the hose elevator. In the refueling device, a position detection switch is provided to detect the lifting position, and a hand switch is provided in the middle of the refueling nozzle or hose to operate the hose elevator and raise or lower the refueling nozzle to a predetermined position. An emergency stop circuit is provided that measures a predetermined time that is a minute longer than the required elevating time to ascend and descend to a predetermined position based on the operation, and outputs a motor stop signal.

With this configuration, when the hand switch is operated to move the refueling nozzle up and down, even if the position detection switch is not operated, the hose stops moving up and down when the predetermined time has elapsed, thereby ensuring safety.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The oil supply device of the present invention will be described below along with embodiments shown in the drawings.

1 to 3 show a first embodiment of the present invention. In FIG. 1, a building 2 equipped with an office, etc. is provided at a gas station site 1, and above the building 2, a building 2 is provided. A high place 3 is formed consisting of a ceiling, beams, canopy, etc. A pipe 4 is provided along the building 2, one end of the pipe 4 opens into a tank 5 installed underground in the site 1, and the other end is connected to a hose elevator to be described later. A pump 7 driven by a pump drive motor 6 and a flow meter 8 for measuring the amount of oil supplied are installed in the middle of the piping 4, and the flow meter 8 transmits a flow signal proportional to the measured flow rate. A flow rate transmitter 9 is attached.

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

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

A switch box 20 is provided at the refueling nozzle 14 or at a position near the refueling nozzle 14 in the middle of the hose 13, and the switch box 20 includes a lowering switch 21 for lowering the refueling nozzle 14 from the standby position A to the refueling position B. , conversely, the lift switch 22 raises the refueling nozzle 14 from the refueling position B to the standby position A, and the refueling nozzle 14 is raised to the refueling position B.
A reset switch 23 is provided for resetting the displayed value of the display meter 19 to zero, and a lowering switch 21 is provided.
An operating string 24 is provided.

Next, FIG. 2 is a control circuit diagram of the hose lifting motor including the abnormality detection circuit on the descending side, and the control circuit 25
consists of a motor control circuit 26, a motor drive circuit 27, and a timer 28 as an emergency stop circuit. Here, the input side of the motor control circuit 26 is connected to the upper end switch 16 and the lower end switch 17 of the switch box 15, and is also connected to the lower switch 21 and the higher switch 22 of the switch box 20. to detect that the lower end switch 17 has reached the refueling position B, the motor drive circuit 2
7, and also outputs a rise signal to the motor drive circuit 27 via the rise signal line 30 from when the rise switch 22 is operated until it detects that the upper end switch 16 is in the standby position A. This is what is output. Further, the motor drive circuit 27 opens and closes between the commercial power source E and the hose lifting motor 12, and rotates the motor 12 in forward and reverse directions.
As mentioned above, when a descending signal is input through the descending signal line 29, the motor 12 is rotated in the normal direction (downward rotation), and when a rising signal is input through the ascending signal line 33, the motor 12 is rotated in the reverse direction (descending rotation). (upward rotation).

In addition, the input side of the timer 28 is connected to the down switch 21.
The timer 28 operates when the lower end switch 17 does not operate even after the elapse of the elevating time required to descend to the refueling position B after lowering the refueling nozzle 14 by operating the lowering switch 21. Motor drive circuit 27 after a minute elapsed time
A motor stop signal is output via the motor stop signal line 31. That is, as shown in FIG. 3, the time from when the lower switch 21 is operated until the lower end switch 17 detects the refueling position B is _T1.
(hereinafter, in the first embodiment, T ₁ is referred to as the lifting time), by setting the time-up time T of the timer 28 to a time obtained by adding a time T ₂ which is smaller than the lifting time T ₁ , the corresponding time can be calculated. The timer 28 is configured to output a motor stop signal based on the time-up signal. Here, since the time T ₁ is fixed for a specific oil supply device, the minute time
By setting _T2 to a time that is long enough to prevent the hose 13 from being reversely wound by the hose reel 10 when the lower end switch 17 is not activated,
A time-up time T can be determined.

Although the present embodiment is constructed as described above, it is assumed that the refueling nozzle 14 is now in the standby position A as shown in FIG.

In order to lower the refueling nozzle 14 to the refueling position from this state, when the string 24 is pulled, the lowering switch 21
is closed, and the motor control circuit 26 outputs a falling signal to the motor drive circuit 27. As a result, the motor 12 rotates normally to rotate the hose reel 11 downward, and the refueling nozzle 14 descends. When the refueling nozzle 14 reaches the refueling position B, the lower end switch 17 is closed, the output of the descending signal from the motor control circuit 26 is stopped, and the rotation of the motor 12 is stopped at this position.

Here, when the worker inserts the refueling nozzle 14 into the fuel tank of the vehicle and opens the valve, the oil in the tank 5 is supplied from the refueling nozzle 14 via the piping 4, pump 7, flow meter 8, and hose 13. Ru. The measured flow rate at this time is transmitted from the flow rate transmitter 9, and the flow rate to be measured is transmitted from the flow rate transmitter 9.
The amount of refueling is displayed on the display 19 via the counting circuit in 8, and the refueling operation is completed when the refueling nozzle 14 is closed.

Next, when the lift switch 22 is closed in order to raise the refueling nozzle 14 from the refueling position B to the standby position A, a raise signal is output from the motor control circuit 26 to the motor drive circuit 27. As a result, the motor 12 reverses and rotates the hose reel 11 in the upward direction, and when the refueling nozzle 14 reaches the standby position A, the upper end switch 16 closes and the output of the upward signal stops, and at this position the refueling nozzle 14 stops rising.

On the other hand, as shown in FIG. 3, the timer 21 is activated at the same time as the down switch 21 is closed, and when the preset time-up time T as described above is reached, a motor stop signal is sent to the motor drive circuit 27 based on the time-up signal. Output. However, as described above, during normal operation, the output of the descending signal stops earlier than the motor stop signal, and the motor 12 has already stopped, so there is no problem.

However, when the refueling nozzle 14 does not operate even after reaching the refueling position B due to a failure of the lower end switch 17, the motor 12 continues to rotate normally and the hose 13
will be fully extended. However, since the time-up time T of the timer 28 is set to the sum of the raising/lowering time _T1 during which the lower end switch 17 should operate and a minute time _T2 , a motor stop signal is output based on the time-up signal of the timer 28. The downward rotation of the motor 12 can be stopped by
Unlike the conventional technology, the reverse winding phenomenon may occur, and the hose 1
It is possible to reliably prevent the damage accidents mentioned in item 3.

Next, FIG. 4 shows a second embodiment of the present invention,
Components that are the same as those in the first embodiment are given the same reference numerals, and their explanations will be omitted. In the above embodiment, the time-up time T of the timer 28 is fixedly set for a specific refueling device. There is. However, firstly, the height of the standby position A is
0 installation height, therefore the lifting time
_T1 also differs depending on the filling station. Secondly, since the frequency of the commercial power source also differs depending on the region, the rotational speed of the motor 12 differs depending on the frequency, and the lifting time T ₁ also differs from this point. In this way, minute time
Even if T ₂ can be fixed, the lifting time T ₁
The time-up time T cannot be uniquely determined because it varies from gas station to gas station and region to region.

Therefore, the feature of this embodiment is that the time-up time T can be automatically set by adding a correction circuit for correcting the lifting time _T1 or the minute time _T2 .

That is, in FIG. 4, 41 is a time measurement circuit;
2 represents a frequency detection circuit, and 43 represents an arithmetic circuit. First, the input side of the time measurement circuit 41 is the down switch 2.
1. It is connected to the lower end switch 17, and measures the rising/lowering time _T1 from when the lower end switch 21 closes to when the lower end switch 17 closes, and outputs it to the arithmetic circuit 43. Further, the arithmetic circuit 43 stores the rising/lowering time _T1 from the time measuring circuit 41 each time, and outputs the time T obtained by adding the minute time _T2 to this time _T1 to the timer 28 each time as a time-up time. Therefore, the timer 28 uses the lifting time measured during the previous refueling operation.
The time-up time T during the current refueling operation can be set based on _T1 . This constitutes a lifting time correction circuit.

Further, the frequency detection circuit 42 detects the frequency of the commercial power source E, and outputs a signal corresponding to either 50Hz or 60Hz to the arithmetic circuit 43. The arithmetic circuit 43 stores this frequency, and if the minute time T ₂₁ when the frequency is 50 Hz and the minute time T ₂₂ when the frequency is 50 Hz, then T ₁
An operation is performed to set +T ₂₁ =T and T ₁ +T ₂₂ =T.
Then, the arithmetic circuit 43 outputs the time T obtained by adding the thus set time _T2 to the lifting time _T1 to the timer 28 each time as a time-up time. This constitutes a minute time correction circuit.

Since the present embodiment is configured in this way, the time measuring circuit 41 measures this time by simply first performing a normal lifting and lowering operation between the standby position A and the refueling position B to determine the lifting time _T1 . Lifting time based on this
T ₁ can be stored in the arithmetic circuit 43, while the frequency of the commercial power source E is detected by the frequency detection circuit 42, and the arithmetic circuit 43 detects that the frequency is 50Hz,
Since calculation is performed to keep the minute time _T2 constant regardless of the frequency of 60 Hz, the time-up time of the timer 28 can be automatically set to the optimum value.

Furthermore, FIG. 5 shows a third embodiment of the present invention, and the same components as those in the second embodiment shown in FIG. The feature of the embodiment is that the timer is set to a predetermined time limit.
The configuration is such that a motor stop signal is output after T' (the time limit T' is set to the same time as the time-up time T), and a failure alarm circuit is provided to notify that the hose elevator has failed. There is a particular thing.

That is, in FIG. 5, 51 is a time-limited timer, 52
53 indicates a failure alarm circuit, and 53 indicates an alarm such as a lamp or a buzzer. The input side of the timer 51 is connected to the down switch 21 and the lower end switch 17, and when the down switch 21 is closed, the time-limited operation is started. However, the time limit operation is reset by closing the lower end switch 17, and the lower end switch 21 is also closed.
When the lower end switch 17 is not activated even though the lower end switch 17 is closed, it is turned on after a time limit T' and outputs a motor stop signal.

On the other hand, when the failure alarm circuit 52 receives the motor stop signal from the timer 51, the alarm 53
to notify the operator of a malfunction in the hose elevator 10. Note that the alarm 53 may not be specially provided, and the unused digits of the display meter 19 may be made to flicker to zero.

In addition, in each embodiment of the present invention, the hose 1
Hose 13 connects the emergency stop circuit that stops the lifting and lowering of 3.
As described above, when the refueling nozzle 14 rises from the refueling position B to the standby position A, the emergency stop circuit is used when the upper end switch 16 fails and does not output a position detection signal even if the refueling nozzle 14 rises from the refueling position B to the standby position A. It is also good to do so. In this case, the input side of the timer 28 may be connected to the rising switch 21 in the first embodiment, and the input side of the time measuring circuit 41 may be connected to the rising switch 21 and the upper end switch 16 in the second embodiment. Further, in each embodiment, the hose elevator 10 is operated by the motor 12 to move the hose reel 1
1 is rotated to raise and lower the refueling nozzle 14, however, the hose reel 11 is eliminated, and a pair of hose lifting rollers are provided which lift and lower the hose 13 by rotating while holding the hose 13. A hose elevator configured to raise and lower the refueling nozzle 14 by rotating the roller with the motor 12 may also be used. Furthermore, although the emergency stop circuit has been described as using the timer 28 or 51, it goes without saying that the emergency stop control of the motor 12 may be executed under program control using a microcomputer.

The refueling device according to the present invention is as described in detail above, and is configured to stop the hose elevating motor after a minute elapse of the required elevating time when the position detection switch provided on the hose elevating machine fails. This prevents accidents such as the hose winding backwards and being damaged, or the joint being damaged due to excessive force. In addition, by providing a lifting time correction circuit that can automatically set the lifting time even if the installation height of the hose elevator differs, and a minute time correction circuit that corrects the minute time to a constant even if the frequency varies, the refueling It is possible to set the motor stop time regardless of the installation location or area of the device, improving the stopping accuracy of the motor, and eliminating the hassle of setting lifting and descending times and minute times for each gas station. can. Further, by providing a failure notification means, there are many effects such as being able to notify the operator of a failure of the hose elevator.

[Brief explanation of drawings]

1 to 3 show a first embodiment of a refueling device according to the present invention, FIG. 1 is an overall configuration diagram thereof, and FIG. 2 is a control of a hose lifting motor including an abnormality detection circuit on the descending side. The circuit diagram, FIG. 3 is a line diagram explaining the operation of FIG. 2, and FIGS. 4 and 5 are diagrams of a hose lifting motor similar to that in FIG. 2 showing the second and third embodiments of the present invention. It is a control circuit diagram. 1... Site, 2... High place, 10... Hose elevator, 11... Reel, 12... Hose lifting motor, 13... Hose, 14... Nozzle, 15, 2
0...Switch box, 16...Upper end switch, 17...Lower end switch, 21...Down switch, 22...Up switch, 25...Control circuit,
26...Motor control circuit, 27...Motor drive circuit, 28, 51...Timer, 41...Time measurement circuit, 42...Frequency detection circuit, 43...Arithmetic circuit, 52...Failure notification circuit.

Claims (1)

[Scope of Claims] 1. A hose elevator operated by a motor is provided at a high location of a refueling station, the hose elevator is provided with a hose having a refueling nozzle at its tip, and the hose elevator is configured to detect the ascending and descending position of the refueling nozzle. In the refueling device, a position detection switch is provided, and a hand switch is provided in the middle of the refueling nozzle or hose to operate the hose elevator and raise or lower the refueling nozzle to a predetermined position. A refueling device characterized by being provided with an emergency stop circuit that measures a predetermined time that is slightly longer than the elevating time required to ascend and descend to a certain position, and outputs a motor stop signal. 2. The emergency stop circuit measures the elevating time from when the hand switch is operated to when the position detection switch is activated, and stores the measured elevating time as the previous elevating time, and starts the next elevating and descending time based on the stored previous elevating time. 2. The oil supply system according to claim 1, comprising a lifting time correction circuit for correcting the lifting time required for the above. 3. The refueling device according to claim 1, wherein the emergency stop circuit includes a minute time correction circuit that measures a commercial power supply frequency and corrects a minute time. 4. The refueling system according to claim 1, wherein the emergency stop circuit includes a failure notification circuit.