JP3618047B2 - Automatic oil supply method and apparatus for oil tank - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for automatically supplying oil to an oil tank that automatically supplies oil to an oil tank of an air blow device that injects oil mist from a punch used in, for example, a punch press.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, an air blow device that injects oil mist from a punch used in a punch press has an oil tank that stores a predetermined amount of oil, and this oil tank has a float switch as an oil remaining amount monitoring means. Built in. The operator was monitoring the remaining amount of oil by turning on and off the float switch.
[0003]
[Problems to be solved by the invention]
By the way, the above-mentioned conventional oil tank has a function of merely monitoring the remaining amount of oil in the float switch and urging oil replenishment. Therefore, the punch (tool) becomes insufficient in refueling and seizes.
[0004]
Also, even if an oil replenishment warning is issued and the operator notices it, failure to replenish the oil due to the trouble of refueling work will cause problems such as insufficient oil supply and seizure, which hinders continuous operation of the punch press, for example. there were.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic oil supply method and an apparatus for an oil tank that can automatically supply oil from an oil can to an oil tank automatically when the remaining amount of oil in the oil tank is low. There is to do.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, there is provided an automatic oil supply method for an oil tank according to the present invention. The circuit is switched from the air blow side to automatic oil supply to supply air to the diaphragm pump, the diaphragm pump is operated, and the oil circuit is opened to supply oil from the oil can to the oil tank. After turning OFF, after a predetermined time, the air circuit is switched to the air blow side by the switching means to close the oil circuit and stop the operation of the diaphragm pump.
[0007]
According to a second aspect of the present invention, there is provided an automatic oil supply apparatus for an oil tank according to the present invention, wherein an oil tank having an oil remaining amount monitoring means therein, an oil can having a larger capacity than the oil tank, and the oil can and the oil tank are connected. An oil pipe, a first switching means, a diaphragm pump provided in series from the oil tank side in the middle of the oil pipe, and a first air pipe connecting the diaphragm pump and the second switching means; When the second air pipe connecting the second switching means and the air source, the third air pipe connecting the second switching means and the air source, and the oil remaining amount monitoring means are turned on and off. And an electric box for operating the first and second switching means, and a fourth air pipe for connecting the second switching means and the oil tank. It is an feature.
[0008]
Accordingly, the remaining amount of oil in the oil tank is detected by turning on the remaining oil amount monitoring means, and the signal is sent to the electric box. The second switching means is actuated by a signal from the electric box, and the air from the air source is sent to the diaphragm pump via the second air pipe and the first air pipe to actuate the diaphragm pump, The first switching means is activated by a signal from the box.
[0009]
Then, the oil in the oil can is sent to the oil pipe, so that the oil in the oil pipe is sent into the oil tank, the remaining oil monitoring means is turned off, and preset in the electric box. When the first switching means is turned OFF and the second switching means is switched after a certain time, the oil circuit is closed, oil from the oil can is not sent to the oil pipe, and the operation of the diaphragm pump is stopped.
[0010]
Next, air from the air source is sent to the oil tank through the third air pipe and the fourth air pipe. The oil supplied to the oil tank is supplied from the oil tank through the oil supply pipe (not shown) to the air / oil mixing manifold, which is installed separately, through the metering valve, and becomes oil mist. Spray onto the punch.
[0011]
Thus, when the remaining amount of oil in the oil tank decreases, the oil is automatically supplied from the oil can to the oil tank without a person. As a result, it is possible to prevent the oil tank from running out of oil and to prevent a punch trouble due to insufficient oil. Moreover, the oil replenishment work that the operator feels troublesome is released, and the original function of the air blow is used correctly.
[0012]
According to a third aspect of the present invention, there is provided an automatic oil supply device for an oil tank according to the present invention, wherein an oil tank having an oil remaining amount monitoring means therein, an oil can having a larger capacity than the oil tank, and the oil can and the oil tank are connected. An oil pipe, a first switching means, a diaphragm pump provided in series from the oil tank side in the middle of the oil pipe, and a first air pipe connecting the diaphragm pump and the third switching means; When the second air pipe connecting the third switching means and the air source, the third air pipe connecting the fourth switching means and the air source, and the oil remaining amount monitoring means are turned on and off. An electric box that operates the first, third, and fourth switching means; and a fourth air pipe that connects the fourth switching means and the oil tank. And it is characterized in Rukoto.
[0013]
Therefore, the same operation as in claims 1 and 2 is performed. At that time, the pressure for pumping the oil to the oil tank is sent from the air source by the fourth switching means, and the oil from the oil can is operated by turning on the first and third switching means to operate the diaphragm pump so that the oil is supplied to the oil tank. Refueled. And it shuts by switching of a 4th switching means, stops the air which applies a pressure, and makes it open, and the oil at the time of oil supply is performed easily.
[0014]
According to a fourth aspect of the present invention, there is provided an automatic oil supply device for an oil tank according to the present invention, wherein the second air pipe and the third air pipe are each provided with a regulator. It is characterized by being.
[0015]
Therefore, since the second air pipe and the third air pipe are provided with guulators, the pressure of the air sent to the diaphragm pump and the oil tank is individually controlled and sent.
[0016]
The automatic oil supply device for an oil tank according to claim 5 is the automatic oil supply device for an oil tank according to claim 2 or 3, wherein a strainer is provided in the middle of the oil pipe connecting the diaphragm pump and the first switching means. It is characterized by that.
[0017]
Therefore, since the strainer is provided in the middle of the oil pipe connecting the diaphragm pump and the first switching means, foreign matters during oil replenishment are collected and foreign matters are prevented from being mixed.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0019]
Referring to FIG. 1, oil mist is sent to a punch of a punch press (not shown), and an air tank is provided with an oil tank 1, and the oil tank 1 has an oil remaining amount monitor for monitoring the remaining amount of oil. A float switch 3 is provided as an example of the means. As an automatic supply device for automatically supplying oil to the oil tank 1, the oil can 5 having a larger capacity than the oil tank 1 and the oil tank 3 are connected by an oil pipe 7. In the middle of the oil pipe 7, a solenoid valve 9, a strainer 11, and a diaphragm pump 13 are provided in series from the oil tank 1 side as an example of the first switching means. That is, as the oil pipe 7, the oil tank 1 and the solenoid valve 9 are the pipe 7A, the solenoid valve 9 and the strainer 11 are the nipple 7B, the strainer 11 and the diaphragm pump are the pipe 7C, and the diaphragm pump 13 The oil can 5 is constituted by a pipe 7D.
[0020]
The diaphragm pump 13 and the solenoid valve 15 as an example of the second switching means are connected by a first air pipe 17, and the solenoid valve 15 and the air source 19 are connected by a second air pipe 21. Yes. A regulator 23 with a filter is provided in the middle of the second air pipe 19. A third air pipe 25 is connected between the solenoid valve 15 and the second air pipe 21, and a regulator 29 having a filter 27 is provided in the middle of the third air pipe 25. Yes. The solenoid valve 15 and the oil tank 1 are connected by a fourth air pipe 31.
[0021]
The float switch 3 is connected to an electric box 35 via a cable 33. A timer 37 is provided in the electric box 35. The electric box 35 is connected to the solenoid valve 15 by a cable 39, and the electric box 35 is connected to the solenoid valve 9 by a cable 41. The electric box 35 is connected to a power source and a machine-side NC console by cables 43 and 45. The oil tank 1 is connected to an air / oil mixing manifold via a metering valve via an oil supply pipe (not shown).
[0022]
With the above configuration, the automatic supply method to the oil tank 1 will be described based on the flowchart shown in FIG. 2. When the oil level in the oil tank 1 decreases in step S1, the float switch 3 is turned on in step S2. In step S 3, the signal of the float switch 3 is input to the electric box 35 via the cable 33.
[0023]
In step S4, the solenoid drive relay is turned on via the cable 39. In step S5, the solenoid valve 15 is turned on to switch the air circuit from the air blow side to the automatic supply device side. In step S6, the air from the air source 19 is sent to the regulator 23 through the second air pipe 21, and after the pressure is reduced to a predetermined pressure by the regulator 23, the B of the solenoid valve 15 is passed through the first air pipe 17. It is sent from the port to the diaphragm pump 13 through the FB port. In step S7, the diaphragm pump 13 operates.
[0024]
While the diaphragm pump 13 is operating, the solenoid valve 9 is turned on from the electric box 35 via the cable 41 in step S8, and the oil circuit is opened in step S9. In step S10, the oil can 5 is supplied to the oil tank 1 through the pipes 7D and 7C, the strainer 11, and further through the nipple 7B and the pipe 7A. In step S11, the float switch 3 in the oil tank 1 is turned OFF, and in step S12, automatic refueling is performed until a predetermined time elapses by a timer 37 in the electric box 35.
[0025]
In step S13, the time is up and the holding of the solenoid drive relay is released. In step S14, the solenoid valve 9 is turned off and the oil circuit of the air circuit is closed. When the solenoid valve 15 is switched in step S15, the air from the air source 19 is not sent from the solenoid 15, and the operation of the diaphragm pump 13 is stopped. In step S16, it is determined whether refueling is normal. If the refueling is unfilled, the process returns to the step before step S4. If the refueling is sufficient, the oil supply is terminated in step S17. Then, the air is sent from the air source 19 through the second air pipe 21 and the third air pipe 25 to the regulator 29 and the pressure of the air is reduced to a constant level, and then the oil tank passes through the fourth air pipe 31. 1 is sent. The oil supplied to the oil tank 1 is supplied from the oil tank 1 through an oil supply pipe (not shown) at a predetermined pressure by this air, supplied to a separately installed air / oil mixing manifold via a metering valve, and becomes oil mist. For example, it is injected into the punch of a punch press. When the oil level in the oil tank 1 is lowered again in step S18, steps S1 to S17 are repeated as described above.
[0026]
Thus, when the remaining amount of oil in the oil tank 1 is reduced, the oil is automatically supplied from the oil can 5 to the oil tank 1 unattended. As a result, it is possible to prevent the oil tank 1 from running out of oil and to prevent a punch trouble due to lack of oil. Further, it is freed from the oil replenishment work that the operator feels troublesome, and the original function of the air blow can be used correctly.
[0027]
FIG. 3 shows another embodiment in place of FIG. In FIG. 3, parts that are the same as the parts in FIG. In FIG. 3, solenoid valves 47 and 49 as an example of third and fourth switching means are provided instead of the solenoid valve 15 as the second switching means.
[0028]
The solenoid valve 47 is connected to one end of the first air pipe 17 and one end of the second air pipe 21. The solenoid valve 49 is connected to one end of the third air pipe 25 and one end of the fourth air pipe 31. Moreover, the solenoid valve 49 is connected to the electric box 35 by a cable 51. Further, another timer 53 is provided in the electric box 35.
[0029]
Due to the above configuration, the operation in this case is the same as that of the above-described embodiment, except that the solenoid valves 9, 47, 49 are controlled simultaneously. The solenoid valve 49 is of the NO type, and usually applies pressure for pumping oil to the oil tank 1 from the air source 19 through the third air pipe 25 and the fourth air pipe 31. This circuit is shut by switching the solenoid valve 49 to stop the air for applying pressure and to open the circuit so that oil can be easily entered during refueling.
[0030]
The solenoid valves 9 and 47 operate in the same manner as in the above-described embodiment. The solenoid valves 9 and 47 are controlled by a timer 37 built in the electric box 35 for a predetermined period of time, and are used for refueling. The diaphragm pump 13 is operated. At this time, if the amount of oil supply is not sufficient even though the diaphragm pump 13 has been operated for a set time due to some trouble, the contact of the float switch 3 on the oil tank 1 side is ON for a certain time by the timer 53. When it continues, it restarts and operates the solenoid valve control circuit again. This restart operation is repeated until the oil supply is normally performed and the contact of the float switch 3 on the oil tank 1 side is turned off.
[0031]
However, since the original oil can 5 may be empty, if the restarting operation is continued for a certain period of time, the state is notified by a warning lamp and a warning by a buzzer.
[0032]
Therefore, even in this case, the same effect as that of the embodiment shown in FIG. 1 can be obtained. Moreover, the pressure for sending oil to the oil tank 1 is sent from the air source 19 by the solenoid valve 49, and the oil from the oil can 5 operates the diaphragm pump 13 when the solenoid valves 9 and 47 are turned on, and the oil is supplied to the oil tank 1. Is refueled. Then, the solenoid valve 49 is switched to shut off, and the air to be pressurized is stopped and opened to facilitate the oil entry during the oiling time.
[0033]
Moreover, since the regulators 23 and 29 are provided in the 2nd air piping 21 and the 3rd air piping 25, the pressure of the air sent to the diaphragm pump 13 and the oil tank 1 can be individually controlled and sent. .
[0034]
Furthermore, since a strainer 11 is provided in the middle of the oil pipe 7 connecting the diaphragm pump 13 and the solenoid valve 9 of the first switching means, foreign matters can be collected when oil is replenished and foreign matters are prevented from being mixed. can do.
[0035]
In addition, this invention is not limited to embodiment of invention mentioned above, It can implement in another aspect by making an appropriate change.
[0036]
【The invention's effect】
As can be understood from the description of the embodiment of the invention as described above, according to the first and second aspects of the invention, the remaining amount of oil in the oil tank is detected by turning on the remaining oil amount monitoring means. The signal is sent to the electrical box. The second switching means is actuated by a signal from the electric box, and the air from the air source is sent to the diaphragm pump via the second air pipe and the first air pipe to actuate the diaphragm pump, The first switching means is activated by a signal from the box.
[0037]
Then, the oil in the oil can is sent to the oil pipe, so that the oil in the oil pipe is sent into the oil tank, the remaining oil monitoring means is turned off, and preset in the electric box. When the first switching means is turned OFF and the second switching means is switched after a certain time, the oil circuit is closed, oil from the oil can is not sent to the oil pipe, and the operation of the diaphragm pump is stopped.
[0038]
Next, air from the air source is sent to the oil tank through the third air pipe and the fourth air pipe. The oil supplied to the oil tank is supplied by the air at a predetermined pressure from the oil tank through a separate oil feed pipe to a separately installed air / oil mixing manifold via a metering valve, and becomes oil mist, for example, for a punch press. It is injected into the punch.
[0039]
Thus, when the remaining amount of oil in the oil tank is reduced, the oil can be automatically supplied to the oil from the oil can without an attendant. As a result, it is possible to prevent the oil tank from running out of oil and to prevent a punch trouble due to lack of oil. Further, it is freed from the oil replenishment work that the operator feels troublesome, and the original function of the air blow can be used correctly.
[0040]
According to the invention of claim 3, the same effects as those of claims 1 and 2 can be obtained. Moreover, the pressure for pumping oil to the oil tank is sent from the air source by the fourth switching means, and the oil is supplied from the oil can to the oil tank by operating the diaphragm pump when the first and third switching means are ON. Is done. And it shuts off by switching of a 4th switching means, can stop the air which applies a pressure, and can make it open, and can enter oil at the time of oil supply easily.
[0041]
According to the invention of claim 4, since each of the second air pipe and the third air pipe is provided with a GUULATOR, the pressure of the air sent to the diaphragm pump and the oil tank can be individually controlled and sent. it can.
[0042]
According to the fifth aspect of the present invention, since the strainer is provided in the middle of the oil pipe connecting the diaphragm pump and the first switching means, it is possible to collect foreign matter during oil supply and prevent foreign matter from being mixed in. can do.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an automatic oil supply apparatus for an oil tank according to the present invention.
FIG. 2 is a flowchart illustrating an automatic oil supply method for an oil tank according to the present invention.
FIG. 3 is a block diagram showing an automatic oil supply device for another oil tank of the present invention.
[Explanation of symbols]
1 Oil tank 3 Float switch (Oil remaining amount monitoring means)
5 Oil can 7 Oil piping 9 Solenoid valve (first switching means)
11 Strainer 13 Diaphragm pump 15 Solenoid valve (second switching means)
17 First air pipe 19 Air source 21 Second air pipe 23 Regulator with filter 25 Third air pipe 29 Regulator 31 Fourth air pipe 35 Electric box 37, 53 Timer 39, 41, 43, 45, 51 Cable 47 Solenoid valve (third switching means)
49 Solenoid valve (fourth switching means)

Claims (5)

This diaphragm pump supplies the air to the diaphragm pump by switching the air circuit from the air blow side to the automatic oil supply by the switching means when the remaining amount of oil in the oil tank is detected and turned on. The oil circuit is opened and oil is supplied from the oil can to the oil tank. After the oil remaining amount monitoring means is turned off, the air circuit is switched to the air blow side by the switching means after a predetermined time has elapsed. And automatically closing the oil circuit and stopping the operation of the diaphragm pump. An oil tank having an oil remaining amount monitoring means inside, an oil can having a larger capacity than the oil tank, an oil pipe connecting the oil can and the oil tank, and the oil tank side in the middle of the oil pipe The first switching means, the diaphragm pump provided in series, the first air piping connecting the diaphragm pump and the second switching means, and the second air connecting the second switching means and the air source A pipe, a third air pipe connecting the second switching means and an air source, and an electric box for operating the first and second switching means when the oil remaining amount monitoring means is turned on and off, An automatic oil supply apparatus for an oil tank, comprising: a fourth air pipe for connecting the second switching means and the oil tank. An oil tank having an oil remaining amount monitoring means inside, an oil can having a larger capacity than the oil tank, an oil pipe connecting the oil can and the oil tank, and the oil tank side in the middle of the oil pipe The first switching means, the diaphragm pump provided in series, the first air piping connecting the diaphragm pump and the third switching means, and the second air connecting the third switching means and the air source An electric box for operating the first, third and fourth switching means when the oil remaining amount monitoring means is turned on and off; and a pipe, a third air pipe connecting the fourth switching means and the air source And a fourth air pipe for connecting the fourth switching means and the oil tank, and an automatic oil supply device to the oil tank. 4. The automatic oil supply device for an oil tank according to claim 2, wherein a regulator is provided for each of the second air pipe and the third air pipe. The automatic oil supply device for an oil tank according to claim 2 or 3, wherein a strainer is provided in the middle of the oil pipe connecting the diaphragm pump and the first switching means.

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