KR900008356B1 - Oiler - Google Patents

Abstract

The oil supply apparatus comprises an oil supply nozzle (10); a pump (6); a flow meter (7); a nozzle receiving part (11); a switching means for driving the pump when the nozzle is removed from the nozzle receiving part; a preset means for presetting the oil supplying amount or the price to refuel unitl the oil supplying amount or price reaches a preset value; a means for driving the pump for a short time when the nozzle is received in the receiving part; and a safety certfying means for preventing the pump from being driven when the oil counting amount is larger than the presetted amount.

Description

Lubrication device

1 is an overall configuration diagram showing an embodiment of the oil supply apparatus of the present invention.

2 is a circuit diagram of one embodiment of a specific configuration of the control circuit in FIG.

3 is a view for explaining the operation of the circuit of FIG.

4 is a flowchart illustrating the operation when the control circuit is composed of a microcomputer.

* Explanation of symbols for the main parts of the drawings

6: oil supply pump 7: flow meter

9: oil supply hose 10: oil supply nozzle

11: nozzle housing 12: switch

17, 18: preset oil supply means 22, 23: drive means

The present invention relates to a lubrication device, and in particular, when the operator does not notice that the valve of the nozzle is open and stores the lubrication nozzle in the nozzle housing, the lubrication nozzle is started with the valve open in the next turn. It is about a lubrication device to prevent it.

In the past, a preset oil supply device has been known. In this type of preset oil supply device, a desired amount of fuel or a desired amount of money is preset, and a predetermined amount of fuel matching the preset value is supplied.

The lubrication device of the above-described type generally includes a pump and a flow meter installed in a housing, a pipe connected at one end to the pump and a flow meter and connected to a lubrication hose at the other end, a lubrication nozzle installed at the tip of the hose, and a lubrication nozzle Preset lubrication is performed by presetting the nozzle storing portion provided in the housing, the switching mechanism for driving the pump when the lubricating nozzle is pulled out of the nozzle storing portion, and the amount or amount of lubrication desired when lubricating. And a preset mechanism to perform.

In this lubrication device, the lubrication amount or amount is preset by the preset lubrication mechanism, the lubrication nozzle is pulled out from the nozzle housing portion, lubricated to the fuel tank of the vehicle, and when the preset amount is reached, the pump stops driving to determine After lubrication is finished, the lubrication nozzle is then stored in the nozzle housing to prepare for the next lubrication.

However, unlike the conventional oil supply work in which the operator of the gas station opens and closes the oil supply nozzle by manual operation, the preset oil supply device automatically stops driving the pump when a predetermined preset amount is reached to supply fixed quantity oil supply. In this case, the oil supply nozzle can be hung on the nozzle housing without knowing that the valve of the oil supply nozzle is left open.

As a result, in the next lubrication operation, if the lubrication nozzle is pulled out by the nozzle housing, the switch mechanism is immediately activated, the pump is driven, and there is a risk that oil may flow out before the lubrication nozzle is inserted into the fuel tank of the vehicle.

For this reason, a lubrication device with a check mechanism that prevents the pump from running unless the lubrication nozzle is opened before starting the lubrication operation is known.However, it is necessary to check whether the valve of the lubrication nozzle is open every time. To do has a complicated defect.

It is therefore an object of the present invention to eliminate such defects and to provide a novel and useful oil supply device.

Another and still more object of the present invention is to automatically check whether the valve of the oil supply nozzle is open after the end of the preset oil supply, and to supply the oil supply device to prohibit the next oil supply operation only when the valve of the oil supply nozzle is open. To provide.

The oil supply apparatus according to the present invention includes a pump driving means for driving a pump only for a short time by operating a switch mechanism installed in the nozzle storage portion when the oil supply nozzle is stored in the nozzle storage portion after the completion of the preset oil supply operation. When the measured flow rate measured by the flow meter is larger than the predetermined flow rate when the pump is driven, and the measured flow rate is larger than the predetermined flow rate, the pump is next pulled out of the nozzle housing and the switch mechanism is operated. It consists of a safety check means for prohibiting the driving of.

When the preset oil supply is finished and the oil supply nozzle is stored in the nozzle housing, the pump driving means operates to drive the pump only for a short time, and the oil flow rate flowing through the moving device is determined by the safety checking means, and the oil flow rate is determined by the safety check means. If it is greater than the pump operation is prohibited during the next lubrication operation. In this way, even when using the preset oil supply apparatus, it is possible to prevent the oil from flowing out at the moment of extracting the oil supply nozzle from the nozzle housing.

Other objects and features of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

In FIG. 1, the housing 1 of the stationary lubrication device is composed of a lower housing 2 and an upper housing 3, and inside the lower housing 2 there is a pipe 4 connected to a tank (not shown). In the middle of the pipe 4, the pump 6 driven by the pump driving motor 5 and the flow meter 7 for measuring the oil supply amount are respectively installed, and the flow meter 7 measures the flow rate. And a flow rate transmitter 8 for transmitting a flow rate signal in proportion to the flow rate. In addition, an oil supply hose 9 is connected to the other end of the pipe 4, and an oil supply nozzle 10 is attached to the tip of the oil supply machine 9.

The nozzle accommodating part 11 is located in the lower housing 2 for accommodating the oil supply nozzle 10 other than the oil supply operation. The nozzle housing 11 constitutes a switch 12, and the switch 12 is closed when the oil supply nozzle 10 is peeled off from the nozzle housing 11, and the switch is closed when the oil supply nozzle is housed in the nozzle storage 11. 12 is opened.

As will be described later in the specification, the motor 5 is driven to rotate when the switch 12 is closed and the motor 5 stops rotating when the switch 12 is opened.

The oil recovery device 11A is installed in the nozzle storage unit 11, and the tip of the oil supply nozzle 10 is connected to the oil recovery device 11A at the position where the oil supply nozzle 10 is housed in the nozzle storage unit 11. Is inserted. For example, the oil recovery device 11A recovers oil leaking from the oil supply nozzle 10 and the recovered oil enters the pipe 4 through the air separator SP.

On the other hand, the indicator 13 is located in front of the upper housing 3, the indicator 13 is composed of a price indicator 14, oil supply flow rate indicator 15, the unit price indicator 16. The preset device 17 is located on the rear side of the upper housing 3.

, 15

, 20

, 30

, 40

의 급유량을 프리세트하는 프리세트버튼(18A), (18B), (18C), (18D), (18E)를 갖춘다. 따라서, 프리세트버튼(18A), (18B), (18C), (18D), (18E)중 임의의 버튼을 압동하므로써 소망의 프리세트양을 설정할 수 있다.For example, the preset device 17 is 10

, 15

, 20

, 30

, 40

Preset buttons 18A, 18B, 18C, 18D, and 18E are provided to preset the oil supply amount. Therefore, the desired preset amount can be set by pressing any of the preset buttons 18A, 18B, 18C, 18D, and 18E.

The preset buttons 18A, 18B, 18C, 18D, and 18E are not limited to preset the oil supply amount. For example, the preset buttons 18A, 18B, 18C, 18D, and 8E can be designed to preset amounts of 1,000 yen, 1,500 yen, 2,000 yen, 3,000 yen and 4,000 yen. Further, a preset button for presetting a class rainfall and a preset button for presetting an amount of money may be provided at the same time. Furthermore, a dial setter may be installed in place of the preset buttons 18A, 18B, 18C, 18D and 18E so that the setting can be changed continuously.

The control circuit 20 and the unit price setter 19 shown in FIG. 2 described later are located in the upper housing 3 and the unit price set in the unit price setting device 19 is displayed through the control circuit 20. Is indicated at (16). The unit price setting device 19 operates only when there is a change in the unit price of oil. Thus, the unit price setting device 19 is usually covered by the upper housing 3.

A specific embodiment of the control circuit 20 is shown in FIG. The input side of the control circuit 20 is connected to the flow rate transmitter 8, the switch 12, and the preset device 17, while the output side of the control circuit 20 is an alarm 21 such as a buzzer, a lamp, and a motor. It is connected to the drive circuit 22 and the indicator drive circuit 23.

The motor driving circuit 22 is connected between the A.C power supply E and the motor 5 and controls the start and stop of the motor 5. The display driving circuit 23 is also connected to the display device 13 and controls the operation display of the display device 13. The display driving circuit 23 converts the signal obtained from the counting circuit described later into the display driving signal for each digit.

The control circuit 20 includes AND circuits 24, 25, 26, 27, 28, 29, 30 and inverters 31, 32, 33, (34) and monostable multivibrators (35), (36) and (37) applied to the trigger circuit and monostable multivibrators (38), OR furnaces (39), (40) and flow rate transmitters (applied as timers). And a counter circuit 41, 42, memory circuits 43, 44, a comparison circuit 45, 46, and a flip-flop 47.

As described in the following specification, the monostable multivibrator 38 stores the oil supply nozzle 10 in the nozzle housing 11, and if the valve of the oil supply nozzle 10 is opened when it is checked for safety, the oil supply nozzle 10 is opened. It is applied as a timer for driving the motor 5 for a predetermined short time t, which is a minimum time allowing at least a predetermined flow rate supplied through.

)를 기억하며 기억회로(44)는 프리세트장치(17)에서 프리세트되는 프리세트양을 기억한다. 비교회로(45)는 계수회로(41)에 계수되는 급유량과 기억회로(43)에 기억되는 소정의 유량과를 비교하고 두양이 일치할때 일치신호를 출력한다. 반면에, 비교회로(46)는 계수회로(42)에 계수되는 급유량과 기억회로(44)에 기억되는 프리세트양을 비교하고 두양이 일치할때 정량신호를 출력한다.The memory circuit 43 has a predetermined flow rate (for example, 0.05) absorbed by the expansion of the oil supply hose 9 when the safety check is made.

), And the memory circuit 44 stores the preset amount preset by the preset device 17. The comparison circuit 45 compares the oil supply amount counted by the counting circuit 41 with a predetermined flow rate stored in the memory circuit 43 and outputs a coincidence signal when the two quantities coincide. On the other hand, the comparison circuit 46 compares the oil supply amount counted in the counting circuit 42 and the preset amount stored in the memory circuit 44 and outputs a quantitative signal when the two quantities coincide.

The output side of the flow rate transmitter 8 is connected to the input side of the AND circuits 24 and 26, and the output side of the AND circuit 24 is connected to the input side of the counter circuit 41, and the output counter circuit of the AND circuit 26 ( Is connected to the input side of 42).

The output of the switch 12 is connected to the reset terminal 41R of the counting circuit 41 through the monostable multivibrator 35 and also to the input side of the AND circuits 26 and 29. Furthermore, the output of the switch 12 is connected to the input side of the AND circuits 24 and 25 via the inverter 31 and to the input side of the AND circuit 27 via the monostable multivibrator 36. . The output of the preset device 17 is connected to the input of the memory circuit 44.

An input of the comparison circuit 46 is connected to the output of the counting circuit 42 and the output of the memory circuit 44. The output terminal 46A of the comparison circuit 46 for quantitative signal output is connected to the input sides of the AND circuits 24 and 25 and is connected to the input side of the AND circuit 30 through the inverter 34. In addition, the output of the counting circuit 42 is connected to the input of the indicator device 13 via the indicator driving circuit 23. The output of the AND circuit 25 is connected to the input of the monostable multivibrator 38 and the output of the monostable multivibrator 38 is connected to the AND circuit 28 through the inverter 32 and the monostable multivibrator 37. Is connected to the input of the motor driving circuit 22 through the OR circuit 40 at the same time. On the other hand, the output side of the AND circuit 27 is connected to the reset terminal 42A of the counting circuit 42 through the AND circuit 39 and to the input of the indicator driving circuit 23.

The input side of the comparator circuit 45 is connected to the output of the counting circuit 41 and the memory circuit 43, and the output terminal 45A of the comparator circuit 45 for the coincidence signal output is connected to the AND circuit (via the inverter 33). And the set terminal 47S of the flip-flop 47. The output of the AND circuit 28 is connected to the reset terminal 47R of the flip-flop 47 and to the input of the OR circuit 39. Furthermore, the set output terminal 47Q of the flip-flop 47 is connected to the input of the alarm 21 and the reset output terminal 47 of the flip-flop 47. Is connected to the input sides of the AND circuits 27 and 29. The output side of the AND circuit 29 is connected to the input side of the AND circuit 30 and the output side of the AND circuit 30 is connected to the input side of the OR circuit 40.

Next, the operation of the oil supply apparatus according to the present invention having the configuration described above will be described with reference to the operation description shown in FIG.

)의 신호파형을 나타낸다.3 (a) to 3 (w), the flow rate transmitter 8, the switch 12, the AND circuits 24, 25, 26, 27, 28 and 29, respectively. , (30), inverter (31), (32), (33), (34), monostable multivibrator (35), (36), (37), (38), OR circuit (39), ( 40, the output terminal 45A of the comparison circuit 45, the output terminal 46A of the comparison circuit 46 and the output terminals 47Q, 47 of the flip-flop 47 (47).

Signal waveform.

In FIG. 3 (a) to FIG. 3 (w), the time point t ₁ indicates the time point when the oil supply nozzle 10 is peeled off from the nozzle storage unit 11, and the time point t ₂ indicates the time of the oil supply nozzle 10. The time when the valve is opened and the time t ₃ is the time when the valve of the oil supply nozzle 10 is closed and the time t ₄ is the time when the oil supply nozzle 10 hangs the back side to the nozzle housing 11. Respectively.

The period T ₁ represents a period of a normal oil supply operation. A time point t ₅ indicates a time point when the oil supply nozzle 10 is peeled from the nozzle housing 11, and a time point t ₆ indicates a time point when the valve of the oil supply nozzle 10 is opened and a time point t ₇ . Indicates the time when the quantitative signal is sent.

The period T ₂ indicates a preset oil supply operation period. Of the time points t ₈ to t ₁₃ , the time point t ₈ indicates when the oil supply nozzle 10 is stored behind the nozzle storing unit 11, and the time point t ₁₀ indicates the oil supply nozzle 10. The time when t ₁₁ is instructed to depart from the nozzle housing 11, the time t ₁₁ indicates when the valve of the oil supply nozzle 10 is closed, and the time t ₁₂ indicates that the oil supply nozzle 10 is connected to the nozzle storage unit. (11) Indicate when it is stored on the back. The period T ₃ represents a confirmation operation period for confirming the open state of the oil supply nozzle 10.

)는 세트상태에 있다. 더욱 계수회로(41, 42)는 각각 전회의 급유량을 리세트한다. 이 상태에서 인버어터(inverter)(31, 32, 34)의 출력만이 높고, 다른 관련회로의 출력은 낮은상태를 유지한다.Before the oil supply device is operated, the oil supply nozzle 10 is accommodated in the nozzle housing and the switch 12 is opened. Furthermore, the control circuit 20 is in a normal state and the reset output terminal 47 of the flip-flop circuit 47.

) Is in the set state. Furthermore, the counter circuits 41 and 42 respectively reset the last oil supply amount. In this state, only the outputs of the inverters 31, 32, and 34 remain high, while the outputs of the other related circuits remain low.

First, the normal oil supply operation to which the preset device 17 is not applied will be described.

When the oil supply nozzle 10 is separated from the nozzle housing 11, the switch 12 is closed as shown in FIG. 3 (b). Thus, the output of the monostable multivibrator 35 becomes high instantaneously as shown in Fig. 3 (n), so that the output of the monostable multivibrator 35 resets the count value in the counter circuit 41. It is applied to the reset terminal 41R of (41). Further, the output of the monostable multivibrator 36 becomes high instantaneously as shown in FIG. 3 (o) and therefore the output of the AND circuit 27 becomes high instantaneously as shown in FIG. 3 (f). .

This output of the AND circuit 27 is connected to the reset terminal 42R of the counting circuit 42 via an OR circuit 39 which generates the signal shown in FIG. 3 (r) to reset the counting circuit 42. Is applied. On the other hand, when the output of the AND circuit 27 is high, the indicator driving circuit 23 is put into an operating state by the high state output of the AND circuit 27. In the operating state of the indicator drive circuit 23, the indicators 14 and 15 are reset to zero. Further, when the switch 12 is closed, the output of the AND circuit 29 is high as shown in FIG. 3 (h) and therefore the output of the AND circuit 30 is also high as shown in FIG. 3 (i).

As a result, the output of the OR circuit 40 shown in FIG. 3 (s) is supplied to the motor driving circuit 22. Therefore, the AC voltage e from the AC power source is applied to the motor 5 to start the motor 5 and drive the pump 6. In this state, the oil supply apparatus can normally perform oil supply operation.

When the oil supply nozzle 10 is inserted into the fuel tank of the vehicle and opened in the above state, fuel from the tank is supplied through the pipe 4, the pump 6, the flow meter 7, and the oil supply hose 9. Supplied to. The flow rate is measured in the flow meter 7 when fuel is supplied through the oil supply nozzle 10.

The flow rate signal shown in FIG. 3 (a) emitted from the flow rate transmitter 8 is applied to the AND circuits 24 and 26. In this state, the gate of the AND circuit 24 is closed by the output of the inverter 31 while the gate of the AND circuit 26 is opened by the output of the switch 12.

Thus, the flow rate signal is supplied to the counting circuit 42 through the AND circuit 26 as shown in FIG. 3 (e) so that the flow rate signal becomes a binary decimal coefficient. The output of the counter circuit 42 is supplied to the display device 13 through the indicator drive circuit 23 and the flow rate is continuously accumulated and displayed on the display device 13.

The valve of the oil supply nozzle 10 is closed when the desired oil supply amount is reached, and the oil supply nozzle 10 having the closing valve is stored behind the nozzle housing 11. As a result, the switch 12 is opened, and the output of the AND circuit 29 is low. The low state output of the AND circuit 29 is supplied to the motor driving circuit through the OR circuit 40 and the motor 5 is stopped by the output of the motor driving circuit 22. Therefore, the pump 6 stops driving and the normal oil supply operation is completed.

Next, the preset oil supply operation to which the preset device 17 is applied will be described.

Before the preset oil supply operation is started, the preset button 18A is operated to preset the desired oil supply flow rate via 18E of the preset device 17. When the desired oil supply flow rate is preset, this desired oil supply flow rate is stored in the memory circuit 44 together with the preset amount.

The switch 12 is then closed when the oil supply nozzle 10 is separated from the nozzle housing 11. Thus, the motor 5 starts to rotate as in the case of the normal oil supply operation described above. The oil supply unit can also perform oil supply operation in this state. When the oil supply nozzle 10 is inserted into the fuel tank of the vehicle and opened in this state, fuel is supplied through the oil supply nozzle 10. The flow rate signal from the flow rate transmitter 8 is supplied to the counting circuit 42 through the AND circuit 26 and counted in the counting circuit 42.

On the other hand, the comparison circuit 46 compares the preset amount stored in the memory circuit 44 with the oil supply amount continuously counted in the counting circuit 42.

When the two quantities compared in the comparison circuit 46 coincide, the quantitative signal shown in FIG. 3 (u) is generated through the output terminal 46A. As a result, the quantitative signal is supplied to the inverter 34 and the inverter 34 generates the signal shown in FIG. 3 (m).

)와 스위치(12)의 출력으로부터 제3(w)도에 나타난 출력으로 인해 높은상태일지라도 낮은상태를 유시한다.Therefore, the output of the AND circuit 30 is the reset output terminal 47 of the flip-flop circuit 47

) And the output shown in FIG.

This is because the output of the inverter 34 promoted to the AND circuit 30 is low. Therefore, the output of the OR circuit 40 is supplied to the motor 5 through the motor driving circuit 22 so as to stop the rotation of the motor 5. As a result, the pump 6 stops driving and the preset oil supply operation is completed.

When the preset oil supply operation is completed as described above, the operator hangs the oil supply nozzle 10 back to the nozzle housing 11. Thus, the switch 12 is opened and the gates of the AND circuits 26 and 29 are closed to prepare for the next oil supply operation.

During the preset oil supply operation, the rotation of the motor 5 is stopped by the quantitative signal from the comparison circuit 46. That is, unlike the normal oil supply operation in which the valve of the oil supply nozzle 10 is normally closed until the oil supply operation is completed, the valve of the oil supply nozzle 10 is opened until completion of the preset oil supply operation. Therefore, the operator must close the valve of the oil supply nozzle 10 when hanging the oil supply nozzle 10 to the nozzle housing 11 until completion of the preset oil supply operation. However, the operator may forget to close the valve of the oil supply nozzle 10 and to store the back of the open oil supply nozzle 10 in the nozzle housing 11.

Therefore, according to the oil supply apparatus of the present invention, it is determined whether the valve of the oil supply nozzle 10 is open when the oil supply nozzle 10 is accommodated in the nozzle housing 11. The oil supply apparatus according to the present invention is configured to perform a safety check prohibiting the next oil supply operation if it is determined that the oil supply nozzle 10 is accommodated in the nozzle housing 11 together with the valve in the open state.

Next, the safety confirmation operation will be described.

When the preset oil supply operation is completed and the oil supply nozzle 10 is housed in the nozzle housing 11 to open the switch 12, the output of the inverter 31 becomes high as shown in FIG. 3 (j). As a result, the AND circuit 25 supplied with the high state output of the inverter and the signal from the output terminal 46A of the comparison circuit 46 generates a high state output as shown in FIG. 3 (d). Therefore, the output of the monostable multivibrator 38 becomes high only for a predetermined short time t as shown in FIG. 3 (q).

The output of the monostable multivibration 38 is supplied to the motor driving circuit 22 through the OR circuit 40 so that the motor 5 rotates only for a short time t. As a result, the pump 6 is driven only for a short time t.

Accordingly, fuel is supplied through the oil supply nozzle 10 through the pipe 4, the pump 6, the flow meter 7, and the oil supply hose 9. In this case, even if fuel leaks from the oil supply nozzle 10, the leaked fuel is recovered by the fuel-recovery device 11A and does not leak out of the oil supply device.

On the other hand, when the output of the inverter 31 is high, the AND circuit 24 is supplied to the high state output of the inverter 31. Also, since the quantitative signal is supplied from the output terminal 46A of the comparison circuit 46 to the AND circuit 24, the gate of the AND circuit 24 will be opened by the high state output of the inverter 31. Therefore, as described above, the flow rate measured by the flow meter 7 by driving the pump 6 for a predetermined short time t is generated from the flow rate transmitter 8 as a flow rate signal. This flow signal is supplied to the counting circuit 41 through the AND circuit 24 which generates the signal shown in FIG. 3 (c). The output signal of the AND circuit 24 is represented by the binary coded decimal coefficient in the counting circuit 41 as the oil supply amount.

The predetermined flow rate Q ₁ is stored in the memory circuit 43. The comparison circuit 45 compares the oil supply amount counted in the counting circuit 41 with the predetermined amount Q ₁ stored in the memory circuit 43. When the valve of the oil supply nozzle 10 is opened, a flow rate larger than the predetermined flow rate Q ₁ flows through the oil supply nozzle 10 when the pump 6 is driven.

Thus, the coincidence signal shown in FIG. 3 (t) is generated through the output terminal 45A of the comparison circuit 45. This coincidence signal is applied to the set terminal 47S of the flip-flop circuit 47 to set the flip-flop circuit 47. The set signal shown in FIG. 3 (v) is generated through the set output terminal 47Q of the flip-flop circuit 47, and this set signal operates an alarm 21 such as a buzzer and a lamp. Thus, the operator knows that the valve of the oil supply nozzle 10 is opened, and when the operator is alerted in this way, the operator closes the valve of the oil supply nozzle in a manner as described later in the specification.

)에서의 신호레벨은 낮은상태를 유지한다.The reset output terminal 47 of the flip-flop 47 can be operated even when the alarm 21 is not activated or the operator does not detect the alarm or the operator ignores the alarm and does not close the valve of the oil supply nozzle 10.

The signal level at) remains low.

)에서의 레벨이 낮은상태를 유지하기 때문에, 계수회로(42)는 AND회로(27)의 출력에 의해 리세트되지 않는다.In this way, when the oil supply nozzle 10 is peeled off from the nozzle housing 11 and the switch is closed at the start of the oil supply operation, the output of the AND circuit 29 is kept low. Thus, the motor 5 does not start to rotate. In addition, the reset output terminal 47 of the flip-flop 47

The coefficient circuit 42 is not reset by the output of the AND circuit 27, because the level at N) remains low.

When the worker receives an alarm that the valve of the oil supply nozzle 10 is opened by the alarm 21 as described above, the worker takes off the oil supply nozzle 10 from the nozzle housing 11 again. As a result, the switch 12 is closed, and the output of the monostable multivibrator 35 has a high level for a while.

)에서의 레벨이 이상태에서 낮기때문에, AND회로(27)의 출력은 낮아지며 계수회로(42)는 리세트되지 않는다.The output of the monostable multivibrator 35 is supplied to the reset terminal 41R of the counting circuit 41 to reset the counting circuit 41. On the other hand, the output of the monostable multivibrator 36 also has a high level for a while and the gate of the AND circuit 27 is opened. However, the reset output terminal 47 of the flip-flop 47

Since the level at) is low in this state, the output of the AND circuit 27 is lowered and the counting circuit 42 is not reset.

Thereafter, the operator closes the valve of the oil supply nozzle 10, which has been peeled off again as described above. After confirming that the valve of the oil supply nozzle 10 is closed, the worker hangs the oil supply nozzle 10 again in the nozzle housing 11. As a result, the output of the inverter 31 is similarly high as described above, so that the output of the AND circuit 25 is high.

Therefore, the output of the monostable multivibrator 38 has a high level only for a predetermined short time t to rotate the motor 5 only for a short time to drive the pump 6 only for this short time. In this state, since the valve of the oil supply nozzle 10 is closed, only the amount of fuel which can be absorbed by the expansion of the oil supply hose 9 flows even when the pump 6 is driven.

In addition, when the output of the inverter 31 becomes high, the high level output of the inverter 31 is supplied to the AND circuit 24, and the flow signal from the flow rate transmitter 8 is counted through the AND circuit 24. It is supplied to 41 and counted by the counting circuit 41.

On the other hand, the comparison circuit 45 compares the preset flow rate stored in the memory circuit 43 with the lubrication flow rate counted by the counter circuit 41, but the flow rate flowing through the flowmeter 7 is a preset flow rate. It is less because the oil supply nozzle 10 is closed in this state. In this way, the coincidence signal is not generated from the comparison circuit 45. Therefore, the output of the inverter 33 has a high level as shown in FIG. 3 (l) and the gate of the AND circuit 28 is opened.

After a predetermined short time t set in the monostable multivibrator 38 passes, the output of the monostable multivibrator 38 returns to the low level to stop the rotation of the motor 5. Furthermore, the output of the inverter 32 is high as shown in FIG. 3 (k), and the output of the monostable multivibrator 37 has a high level for a while as shown in the third (p) beam. As a result, the output of the AND circuit 28 becomes high as shown in FIG. 3 (g), and this high level output of the AND circuit 28 is supplied to the reset terminal 47R of the flip-flop 47.

)에서의 레벨은 높아진다. 그결과 AND회로(27)의 게이트는 열려서 뒤따르는 급유동장을 준비한다. 또한 AND회로(28)의 출력은 OR회로(39)를 통하여 계수회로(42)의 리세트단자(42R)에 공급되어 계수회로(42)를 리세트하게 된다. 그리므로 비교회로(46)는 그 출력단자(46A)를 통해 정량신호를 발생하지 않게되는데 왜냐하면 계수회로(42)가 리세트되어있기 때문이다.In this way, the flip-flop 47 is reset and the reset output terminal 47

The level at) increases. As a result, the gate of the AND circuit 27 is opened to prepare the subsequent flow field. In addition, the output of the AND circuit 28 is supplied to the reset terminal 42R of the counting circuit 42 through the OR circuit 39 to reset the counting circuit 42. Therefore, the comparator circuit 46 does not generate a quantitative signal through the output terminal 46A because the counter circuit 42 is reset.

Thus, the gates of the OR circuits 24 and 25 are closed and the output of the inverter 34 becomes high. In this way, the gate of the AND circuit is opened to prepare for the subsequent oil supply operation. When these operations are performed, all of the circuit elements shown in FIG. 2 are returned to their original state before the oil supply operation.

The safety check described above is automatically performed when the oil supply nozzle 10 having the closed valve is reinserted into the nozzle housing 11 after the preset oil supply operation is completed. However, in this case, since the coincidence signal is not generated from the comparison circuit 45, the operator will not receive an alarm as well.

In the embodiment described so far, the control circuit 30 has the configuration shown in FIG. The pump drive circuit includes an inverter 31, an AND circuit 25, and a monostable multivibrator 38. The safety confirmation circuit also includes a counting circuit 41, a memory circuit 43, a comparison circuit 45, and a flip-flop 47. However, the control circuit, pump drive circuit and safety check circuit are not limited to those described here.

For example, the control circuit 20 may be configured by a microcomputer including a central processing unit (CPU), a memory circuit, and the like. In this case, the microcomputer is connected to the flow rate transmitter 8, the switch 12, the preset device 17, the alarm 21, the motor drive circuit 22, and the indicator drive circuit via an inter phase circuit. 23) and the oil supply operation is realized by a computer program.

In addition, although the control circuit 20 is installed in the upper housing 3 in the above-described embodiment, the control circuit 20 may be installed in a gas station office or the like.

Although the preset device 17 has also been described as being installed in the upper housing 3, the preset device 17 has other components such as the oil supply nozzle 10, the oil supply nozzle 10, and the middle portion of the oil supply hose 9. It can also be installed in place. In addition, the preset apparatus 17 can be installed independently in a gas station office or safety zone as a preset apparatus panel.

The housing 1 constituting the lubrication device has been described so far as being composed of upper and lower housings 2 and 3, but it is a matter of design choice, so that the housing 1 is composed of a single housing. You may be.

As described so far, the oil supply device according to the present invention automatically checks safety during the preset oil supply operation and determines whether the valve of the oil supply nozzle 10 is open, and thus, during the oil supply operation according to the present invention, if the valve of the oil supply nozzle 10 is open. It is designed to prevent the motor 5 from rotating.

In this way, it is possible to reliably prevent the pump 6 from accidentally starting during the oil supply operation that follows with the valve of the oil supply nozzle 10 open. In addition, the time that the pump 6 is driven to ensure safety can be set to a minimum time. Therefore, even when the valve of the oil supply nozzle 10 is opened, the amount of fuel supplied through the oil supply nozzle 10 during the safety check may be set to a minimum amount. In addition, when the valve of the oil supply nozzle 10 is opened by installing the alarm 21, the operator is alerted in advance, and subsequent oil supply operation can be smoothly performed.

The operation of the control circuit 20 shown in FIG. 2 is performed by a microcomputer in which case the operation of the microcomputer will be described below in relation to the flowchart art shown in FIG.

The operation of the microcomputer starts at step 50 and the power supply of the oil supply unit is turned on at step 51. In step 52, the oil supply apparatus enters a ready state in which oil supply operation can be started. Step 53 determines whether the power supply of the oil supply device is turned off. If the determination result in step 53 is YES, that is, the power is OFF, the operation ends in step 70.

If the determination result in step 53 is NO, step 54 which follows occurs determines whether the oil supply nozzle 10 is loosened. If the determination result in step 54 is NO, the operation returns to step 53 and in step 54 the determination is repeatedly performed. When the oil supply nozzle 10 is peeled off from the nozzle housing 11 and the determination result at step 54 is YES, the operation proceeds to step 55 in which it is determined whether the valve open flag is in the ON state. I'm going.

If the determination result in step 55 is NO, step 56 determines whether the operation is a preset oil supply operation. If the determination result in step 56 is NO, step 57 causes the motor 5 to be turned ON. On the other hand, if the determination result in step 56 is YES, step 58 sets the preset flag to the ON state before proceeding to step 57. Step 59 performs an oil supply operation.

Step 60 determines whether the oil supply nozzle 10 is caught in the nozzle housing 11. If the determination result in step 60 is NO, the operation returns to step 59. On the other hand, if the determination result in step 60 is YES, step 61 determines whether the preset flag is set to the ON state.

If the determination result at step 61 is NO, the motor 5 is turned OFF at step 62, and the operation returns to step 52. FIG. On the other hand, if the determination result in step 61 is YES, the motor 5 rotates for a while (short time) in step 64. Step 65 determines whether a large number of pulses generated from the flow rate generator 8 are greater than a preset number as fuel is pumped for a short time by the rotation of the motor 5. If the result of the determination at step 65 is YES, the valve open flag is set to the ON state at step 66, the warning lamp (alarm device 21) is turned to the ON state at step 67, and the operation again. Return to step 52.

If the determination result in step 65 is NO, the valve open flag is reset to the OFF state in step 68, the warning lamp is turned OFF in step 69, and the operation returns to step 52 again. .

If the determination result in step 55 is YES, step 63 judges whether the oil supply nozzle 10 is again caught in the nozzle housing 11. If the determination result in step 63 is NO, the determination is repeated in step 63.

On the other hand, if the determination result in step 63 is YES, the operation proceeds to step 64. In addition, the present invention is not limited to these embodiments, and various variations and modifications may be made without departing from the scope of the present invention.

Claims (6)

An oil supply nozzle 10 provided at the tip of the oil supply hose 9, a pump 6 for sending oil to the oil supply hose 9, a flow meter 7 for measuring the flow rate of oil sent from the pump 6, And a nozzle means (11) for storing the oil supply nozzle (10), a switch means for driving the pump (6) when the oil supply nozzle (10) is removed from the nozzle accommodation portion (11), A preset oil supply means for pre-charging the desired oil supply amount or amount and driving the pump 6 until the preset oil supply amount or amount is reached; and the oil supply nozzle 10 after the completion of preset oil supply. Is stored in the accommodating part 11, the pump short-time driving means for driving the pump 6 for a short time and the flow rate measured by the flowmeter 7 when the pump 6 is driven for a short time are compared with a predetermined flow rate. When the flow rate is greater than the predetermined flow rate, the oil supply nozzle 10 The oil supply device, characterized in that consisting of a safety check means for prohibiting the driving of the pump (6) even if the switch means is operated when pulled out from the housing (11). The valve of claim 1, wherein the pump (6) is provided at an intermediate portion and has a pipe (4) connected to the oil supply hose (9), and the valve of the nozzle nozzle (10) housed in the accommodating portion (11) is opened. Oil supply device characterized in that it is provided with an oil recovery device (11A) for returning oil flowing from the oil supply nozzle (10) to the pipe (4) when the pump (6) is operated for a short time in the state. 2. The flow rate according to claim 1, wherein the predetermined flow rate is higher than the flow rate measured by the flow meter (7) because the pump (6) is driven for a short time when the oil supply nozzle (10) housed in the housing portion (11) is closed. A fuel supply device characterized in that it is determined to be less than the flow rate to be measured by the flow meter (7) when the cursor of the cursor is stored in the cursor. The oil supply apparatus according to claim 1, wherein the pump short-time driving means is configured to operate only after the preset oil supply type. The alarm 21 according to claim 1, which is operated together with the operation of the safety check means to alert that the oil supply nozzle 10 is accommodated in the accommodating portion 11 while the valve remains open after the completion of preset oil supply. Refueling apparatus characterized in that it further comprises. The oil supply apparatus according to claim 5, wherein the alarm (21) is an alarm lamp or an alarm buzzer.

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