JP4509597B2 - Lubrication system and lubricating oil supply device - Google Patents

Description

  The present invention relates to a lubrication system having two systems of pipes through which lubricating oil such as grease and oil is fed, and a lubricating oil supply device effective for the lubricating system.

Conventionally, as this type of lubrication system, for example, there is a grease lubrication system previously proposed by the present applicant and installed in a resin or metal injection molding machine (Patent Document 1).
As shown in FIG. 12, in an injection molding machine using this lubrication system, a relatively small amount of oil supply such as a toggle portion and a relatively large amount of oil supply such as an open ball screw without a seal are required. If the part with a large amount of oil supply is used as a reference, the amount of oil supplied to the part where the amount of oil supply may be relatively small increases, resulting in waste. Therefore, the parts that require a relatively small amount of oil supply such as a toggle part and the parts that require a relatively large amount of oil supply such as an open ball screw without a seal are divided into parts that require a relatively small amount of oil supply. Is piped to a plurality of corresponding locations using a single metering valve Vt, and on the other hand, it is reciprocated sequentially by pressurizing the lubricating oil to discharge the lubricating oil to a portion that requires a relatively large amount of oil supply. A plurality of pistons (not shown) and a pair of discharge ports corresponding to the pistons are piped at a plurality of corresponding locations using a well-known traveling quantitative valve Vs provided with a plurality of sets.

The single metering valve Vt is operated by pressurizing and depressurizing the lubricating oil, and discharges the lubricating oil. For this reason, the depressurizing is necessary, whereas the progressive metering valve Vs is the lubricating oil. Although the lubricating oil is discharged by the pressurization, no depressurization is particularly necessary for the operation of the valve.
For this reason, in this lubrication system, two systems of pipelines, a first pipeline and a second pipeline, are provided, and the single metering valve Vt is integrated and connected to the first pipeline P1, and the progressive metering valve Vs Are collectively connected to the second pipeline P2.

  In addition, as shown in FIG. 12, the lubrication system includes a first pipeline P1 and a second pipeline P2 arranged in parallel, and is stored in the lubricating oil reservoir 3 in the first pipeline P1 and the second pipeline P2. One pump 1 that feeds the lubricated oil by driving the motor 4, and the pump 1 connected to the pump 1 and switched to supply the lubricant oil from the pump 1 to either the first pipe P1 or the second pipe P2. The switching valve 2 is configured to be capable of feeding and to depressurize the first pipeline P1 when not connected to the first pipeline P1. In the figure, reference numeral 5 denotes a first pipe connection port of the switching valve 2 to which the first pipe P1 is connected, and reference numeral 6 denotes a second pipe connection port of the switching valve 2 to which the second pipe P2 is connected. .

Thus, first, when lubrication is performed in the first pipeline P1, the pump 1 is operated while the pump 1 and the first pipeline P1 are connected by switching the switching valve 2. Next, the pump 1 is stopped and the switching valve 2 is switched to connect the pump 1 and the second pipe P2. Thereby, in the 1st pipe line P1, pressurization and decompression of lubricating oil are performed, valve | bulb Vt act | operates and lubricating oil is discharged.
When lubrication is performed in the second pipeline P2, the pump 1 is operated while the pump 1 and the second pipeline P2 are connected by switching the switching valve 2. Thereby, in the 2nd pipe line P2, valve | bulb Vs act | operates by pressurization of lubricating oil, and lubricating oil is discharged. Thereafter, when the operation of the pump 1 is turned off, the valve Vs stops the discharge of the lubricating oil.
In this way, the first pipe P1 and the second pipe P2 are lubricated.

JP 2002-323196 A

By the way, in the above-described lubrication system, not only the above-described injection molding machine, but depending on the lubrication conditions of the machine, for example, the intermittent time is longer than the intermittent time of the single metering valve Vt of the first pipe line P1, or short intermittent There may be a part where it is desired to supply oil little by little over time. At that time, in the second pipe P2, there is a case where it is desired to perform lubrication using the single metering valve Vt instead of the progressive metering valve Vs. In this case, there is a problem that the second pipe P2 cannot be depressurized and cannot cope with this.
In order to solve this problem, it is conceivable to change the switching valve 2 to another type of two-way switching valve. However, in this case, the switching valve must be replaced, which increases the number of parts. Because work is necessary, it becomes inconvenient. Even if it is replaced with a dedicated two-way switching valve, on the contrary, if it is desired to use the progressive metering valve Vs for the second pipe P2, on the contrary, it becomes difficult to cope with it.

  The present invention has been made in view of such problems, and the second conduit can be easily depressurized and non-depressurized by the switching valve attached to the pump without having to replace the switching valve one by one. It is an object of the present invention to provide a lubrication system capable of switching and improving versatility, and a lubricating oil supply device effective for this system.

The lubrication system of the present invention for solving such a problem has two systems of pipelines, a first pipeline through which lubricating oil is fed and a second pipeline through which lubricating oil is fed. In the lubrication system, the first pipe and the second pipe are provided in parallel, and one pump for supplying lubricating oil to the first and second pipes is integrally attached to the pump. A switching valve that is connected and switched to enable the lubricating oil from the pump to be fed to one of the first pipe and the second pipe;
A primary side discharge port connected to the discharge port of the pump, a primary side open port where the lubricating oil reservoir opens to the side, and a secondary side first pipe connected to the first pipe A secondary side second pipe port connected to the port and the second pipe line, and connects the primary side discharge port and the secondary side first pipe port when energized to turn on the primary side The primary side discharge port and the secondary side second pipe port are disconnected from the primary side discharge port and the secondary side first pipe port, and the primary side discharge port and the secondary side second pipe are turned off when the power is turned off. A solenoid valve for connecting the primary port and the secondary side first pipe port, and connecting the secondary side second pipe line when the solenoid valve is energized. The lubricating oil reservoir is open to the port It has a configuration in which a separate primary side by opening port to.

As a result, the lubricating oil is supplied to the first pipe line and the second pipe line, respectively, and is operated by pressurizing and depressurizing the lubricating oil to discharge the lubricating oil and need to be depressurized for operation. When the valve is piped, first, when lubrication is performed in the first pipeline, the pump and the first pipeline are connected and the pump is operated by switching the switching valve. Next, the pump is stopped and the pump and the second pipe are connected by switching the switching valve. Thereby, in the 1st pipe line, since pressurization and decompression of lubricating oil are performed, a valve operates and discharges lubricating oil. When lubrication is performed in the second pipeline, the pump and the second pipeline are connected by switching the switching valve and the pump is operated. Thereby, pressurization of lubricating oil is performed. Then, after the pump is turned off, the solenoid valve is energized. As a result, the secondary side second pipe port communicates with another primary side separate opening port from which the lubricating oil reservoir opens, and pressure is released. For this reason, since the lubricating oil is pressurized and depressurized also in the second pipe line, the valve is operated to discharge the lubricating oil.
In this case, the second pipe line can be depressurized simply by energizing the solenoid valve after turning off the pump. Therefore, the second pipe line is connected to the depressurization line using the switching valve attached to the pump. Can be easily switched for.

On the other hand, the lubricating oil is supplied to the first pipe and is operated by pressurization and depressurization of the lubricating oil, the lubricating oil is discharged, and a valve that needs to be depressurized for operation is piped, and the second pipe When the lubricating oil is supplied to the valve and the lubricating oil is discharged by pressurizing the lubricating oil and the valve that does not need to be depressurized for operation is installed, the first line is lubricated. By switching the valve, the pump and the first pipe are connected and the pump is operated. Next, the pump is stopped and the pump and the second pipe are connected by switching the switching valve. Thereby, in the 1st pipe line, since pressurization and decompression of lubricating oil are performed, a valve operates and discharges lubricating oil. Further, when lubrication is performed in the second pipeline, the pump and the second pipeline are connected by switching the switching valve and the pump is turned on and off. Thereby, pressurization of lubricating oil is performed. In this case, the second pipe is not depressurized. Therefore, since the second conduit can be made non-depressurized by not energizing the solenoid valve, the second conduit can be easily switched to the non-depressurized conduit by using a switching valve attached to the pump. it can.
Therefore, using the switching valve attached to the pump, the second pipe can be easily switched to the depressurized or non-depressurized line by energizing or de-energizing the solenoid valve, greatly improving versatility. be able to. Moreover, it is possible to connect to either the first pipe line or the second pipe line only by switching the switching valve attached thereto by one pump, and the functions of the two systems of the first pipe line and the second pipe line are impaired. As a result, the lubricating oil can be supplied to each pipeline with one pump, and the lubrication can be simplified and the cost can be reduced.

And, if necessary, a stop mode in which the operation of the pump and the solenoid valve are turned off and the secondary side first pipeline port is communicated with the primary side open port to depressurize the first pipeline; The pump is turned on and off in synchronism with the solenoid valve on and off to supply lubricating oil to the first pipe, and the pump is turned off when the solenoid valve is turned off. The second pipe supply non-depressurization mode for supplying lubricating oil to the second pipe by turning on and off the operation, and the second pipe by turning on and off the pump when the solenoid valve is turned off. A second pipe for supplying lubricating oil to the pipe and releasing the pressure from the second pipe by connecting the secondary side second pipe port to the primary side separate release port by turning on the solenoid valve after the pump is turned off. Supply is configured to include a controller configurable to one of four modes of the depressurizing mode.
By switching the mode of the controller, various lubrication patterns can be realized and versatility can be increased. In particular, by using the second pipe supply depressurization mode, a valve that requires depressurization can be used in the second pipe supply, and by using the second pipe supply non-depressurization mode, the second pipe supply depressurization mode can be used. A non-depressurizing valve can be used in the passage. In short, the second conduit can be easily switched to a depressurizing or non-depressurizing conduit only by mode switching using a switching valve attached to the pump. And versatility can be greatly improved.

  Further, if necessary, a valve piped to the first pipe and the second pipe is reciprocated by pressurization and depressurization of the lubricant and discharges the lubricant and the piston It comprised with the single fixed quantity valve provided with one discharge port corresponding to. Each valve can surely satisfy the lubrication condition of the lubrication site.

Moreover, the lubrication supply apparatus of the present invention for solving the above-described problems is provided in two systems of pipelines, a first pipeline through which lubricating oil is fed and a second pipeline through which lubricating oil is fed. In the lubricating oil supply apparatus capable of feeding the lubricating oil, one pump for feeding the lubricating oil stored in the lubricating oil reservoir to the first pipe and the second pipe, and the pump are integrally provided. Connected to and switched so that the lubricating oil from the pump can be fed to either the first pipe or the second pipe, and the first pipe is disconnected when not connected to the first pipe. A switching valve that enables pressure,
A primary side discharge port connected to the discharge port of the pump, a primary side open port where the lubricating oil reservoir opens to the side, and a secondary side first pipe connected to the first pipe A secondary side second pipe port connected to the port and the second pipe line, and connects the primary side discharge port and the secondary side first pipe port when energized to turn on the primary side The primary side discharge port and the secondary side second pipe port are disconnected from the primary side discharge port and the secondary side first pipe port, and the primary side discharge port and the secondary side second pipe are turned off when the power is turned off. A solenoid valve for connecting the primary port and the secondary side first pipe port, and connecting the secondary side second pipe line when the solenoid valve is energized. The lubricating oil reservoir is open to the port It has a configuration in which a separate primary side by opening port to.

  As a result, it is possible to connect to either the first pipeline or the second pipeline simply by switching the switching valve with one pump, and it is possible to depressurize the first pipeline when not connected to the first pipeline. In addition, by simply energizing the solenoid valve after turning off the pump, the secondary side second pipe port can be connected to the primary side separate opening port to perform depressurization. It can be easily switched to the decompression line. On the other hand, if the pump is turned off and the solenoid valve is de-energized, the second conduit can be depressurized, and therefore the second conduit can be used as a non-depressurized conduit. Therefore, using the switching valve attached to the pump, the second pipe can be easily switched to the depressurized or non-depressurized line by energizing or de-energizing the solenoid valve, greatly improving versatility. be able to. Moreover, it is possible to connect to either the first pipe line or the second pipe line only by switching the switching valve attached thereto by one pump, and the functions of the two systems of the first pipe line and the second pipe line are impaired. As a result, the lubricating oil can be supplied to each pipeline with one pump, and the lubrication can be simplified and the cost can be reduced.

Further, if necessary, the pump is operated and the solenoid valve is turned off, and the secondary side first pipeline port is communicated with the primary side open port to depressurize the first pipeline, and The pump is turned on and off in synchronism with the solenoid valve on and off to supply lubricating oil to the first pipe, and the pump is turned off when the solenoid valve is turned off. The second pipe supply non-depressurization mode for supplying lubricating oil to the second pipe by turning on and off the operation, and the second pipe by turning on and off the pump when the solenoid valve is turned off. A second pipe for supplying lubricating oil to the pipe and releasing the pressure from the second pipe by connecting the secondary side second pipe port to the primary side separate release port by turning on the solenoid valve after the pump is turned off. Road Feeding has a configuration having a controller that can be set to one of four modes of the depressurizing mode.
By switching the mode of the controller, various lubrication patterns can be realized and versatility can be increased. In particular, by using the second pipe supply depressurization mode, a valve that requires depressurization can be used in the second pipe supply, and by using the second pipe supply non-depressurization mode, the second pipe supply depressurization mode can be used. A non-depressurizing valve can be used in the passage. In short, the second conduit can be easily switched to a depressurizing or non-depressurizing conduit only by mode switching using a switching valve attached to the pump. And versatility can be greatly improved.

  Further, the switching valve can be attached to and detached from the pump as required. Instead of the switching valve, for example, a block provided with a discharge port dedicated to the second pipe line can be attached, and the pump can be easily replaced with another type of pump, and versatility can be increased.

  According to the lubrication system of the present invention, using the switching valve attached to the pump, the second pipe can be easily switched to the depressurized or non-depressurized pipe by energizing or de-energizing the solenoid valve. Therefore, versatility can be greatly improved. Moreover, it is possible to connect to either the first pipe line or the second pipe line only by switching the switching valve attached thereto by one pump, and the functions of the two systems of the first pipe line and the second pipe line are impaired. As a result, the lubricating oil can be supplied to each pipeline with one pump, and the lubrication can be simplified and the cost can be reduced.

  Hereinafter, a lubrication system according to an embodiment of the present invention and a lubricating oil supply device used in the system will be described with reference to the accompanying drawings. The lubrication system according to the embodiment is provided in, for example, a resin or metal injection molding machine. In addition, the same code | symbol is attached | subjected and demonstrated to the same thing as the above.

  In the lubrication system according to the embodiment of the present invention, as shown in FIG. 1, a single piston (not shown) that is reciprocated by pressurization and depressurization of the lubricant and discharges the lubricant, and this piston A number of well-known single metering valves Vt having one discharge port corresponding to the above and having a discharge amount per shot of about 0.03 ml to 1.5 ml are used. Then, depending on the lubrication conditions, these single metering valves Vt are divided into two groups, one group is provided in the first pipeline P1, while the other group is provided in the second pipeline P2, and the pipes are provided at the corresponding locations. is doing. Thus, the lubrication system according to the embodiment has two systems of pipelines, the first pipeline P1 and the second pipeline P2. Moreover, the 1st pipe line P1 and the 2nd pipe line P2 are provided in parallel.

  In the lubrication system according to the embodiment, the lubrication oil supply device S according to the embodiment that can supply the lubrication oil to the two systems of the first pipeline P1 and the second pipeline P2 is used. It is done. As shown in FIGS. 1 to 4, the basic configuration of the lubricating oil supply device S includes a single pump 10 that feeds the lubricating oil stored in the first pipeline P1 and the second pipeline P2, and lubrication. The lubricating oil reservoir 20 for storing oil and the pump 10 are integrally attached, connected and switched so that the lubricating oil from the pump 10 can be fed to either the first pipeline P1 or the second pipeline P2. In addition, in the embodiment, the switching valve 30 is configured to allow the first pipe P1 to be depressurized when not connected to the first pipe P1, in the embodiment, when connected to the second pipe P2. .

  Specifically, as shown in FIGS. 2 to 4, the pump 10 is a plunger type pump including a piston 11 and a cylinder 12, and is reciprocally driven by a drive motor 13 via a cam mechanism 14. A lubricating oil reservoir 20 is provided on the upper side of the pump 10, and a mounting portion 15 for the switching valve 30 is formed on the lower side. As shown in FIG. 4, the lower mounting portion 15 of the pump 10 is provided with a discharge port 16 for discharging lubricating oil, and a return port 17 through which the lubricating oil reservoir 20 communicates and opens is exposed. Is provided. As shown in FIG. 3, the lubricating oil reservoir 20 includes a lubricating oil cartridge 21, a cartridge mounting part 22 to which the cartridge 21 is attached, and a cover 23 that is attached to the cartridge mounting part 22 and covers the cartridge 21. It is prepared for.

  The switching valve 30 is constituted by a solenoid valve as shown in FIGS. 3 and 5 to 7, and is connected to the primary discharge port 31 connected to the discharge port 16 of the pump 10 and the return port 17 of the pump 10. The secondary side second pipe connected to the primary side open port 32 where the lubricating oil reservoir 20 opens, the secondary side first pipe port 33 connected to the first pipe P1, and the second pipe P2. A road port 34 is provided. The primary side discharge port 31 and the primary side open port 32 are formed in the mounted portion 35 on the upper side of the switching valve 30, and the secondary side first pipe port 33 and the secondary side second pipe port 34 face the front. Is formed. Reference numeral 36 denotes a vacant port formed for processing, which is closed by a plug 37. 6 and 7, 38 is a spool, 39 is a solenoid for driving the spool 38, and 40 is a spring for returning the spool 38 to a steady position. When the solenoid 39 is energized, the spool 38 connects the primary side discharge port 31 and the secondary side first pipe port 33 and connects the primary side open port 32 and the secondary side second pipe port 34 to the primary side. When the solenoid 39 is cut off from the discharge port 31 and the secondary side first pipeline port 33 and is turned off, the spring 40 is returned to the steady position, and the primary side discharge port 31 and the secondary side second pipeline port 34 and the primary side open port 32 and the secondary side first pipe port 33 are connected.

  In addition, the solenoid valve, which is the switching valve 30, is provided with another primary side separate opening port 60 through which the secondary side second pipe port 34 communicates when the energized state is turned on and the lubricating oil reservoir 20 opens. ing. As shown in FIG. 7, the primary side separate open port 60 is connected to the primary side open port 32 through the communication path 61.

  The switching valve 30 is detachably attached to the pump 10. Specifically, the mounting portion 15 of the pump 10 and the mounted portion 35 of the switching valve 30 are formed in close contact with each other, and as shown in FIG. As shown in FIG. 5, a bolt (not shown) that is screwed into the female screw 41 of the pump 10 is inserted into the switching valve 30 and pressed toward the pump 10 by the bolt head. Four attachment holes 42 for attaching the switching valve 30 to the pump 10 are provided. The switching valve 30 is attached to the pump 10 by inserting a bolt into the mounting hole 42 and screwing into the female screw 41 with the mounting portion 15 of the pump 10 and the mounted portion 35 of the switching valve 30 being in close contact with each other. . Moreover, the switching valve 30 is removed by loosening and removing the bolt. Therefore, the switching valve 30 can be easily integrated with the pump 10. In addition, since the switching valve 30 is integrally attached to the pump 10, it is compact and easy to handle compared to the case where the switching valve 30 is provided separately. Although not shown, instead of the switching valve 30, a block that is attached to the mounting portion 15 of the pump 10 with a bolt and that has a connection port that communicates only with the discharge port 16 of the pump 10 can be mounted. Thereby, it can be set as the lubricating oil supply apparatus only for non-depressurization, for example.

  Further, the lubrication system according to the embodiment includes a controller 50 that controls the drive motor 13 of the pump 10 of the lubricating oil supply device S and the solenoid 39 of the switching valve 30. As shown in FIGS. 8 and 9, the controller 50 synchronizes the operation of the pump 10 and the stop mode Mr for turning off the solenoid 39 and the on / off of the operation of the pump 10 and the on / off of the solenoid 39. The first pipe supply pressure release mode Mt1 for supplying the lubricating oil to the first pipe P1 and the operation of the pump 10 is turned on and off when the solenoid 39 is turned off to supply the lubricating oil to the second pipe P2. The second pipe supply non-depressurization mode Ms and the operation of the pump 10 are turned on and off when the solenoid 39 is turned off to supply the lubricating oil to the second pipe P2, and the solenoid 39 is turned on after the pump 10 is turned off. In this state, the secondary side second pipe port 34 is communicated with the primary side separate release port 60 and set to any one of four modes including a second pipe supply pressure releasing mode Mt2 for releasing the pressure of the second pipe P2. It has a function. In the present system, as shown in FIG. 8, the controller 50 sets one of three modes: a stop mode Mr, a first pipe supply depressurization mode Mt1, and a second pipe supply depressurization mode Mt2. The functions of the controller 50 are realized by functions such as a timer that can be set in time and a microcomputer. The order and time of each mode may be set as appropriate according to the lubrication conditions.

Further, as shown in FIGS. 10 and 11, the lubricating oil supply device S controls the power supply voltage (for example, DC voltage 24V) supplied for starting the solenoid 39 of the solenoid valve that is the switching valve 30. A container 120 is provided.
The power supply controller 120 is configured to include energization / interruption means 121 for intermittently energizing and deenergizing the power supply voltage to the solenoid 39 so that the solenoid 39 is activated to maintain a steady state. .

  Specifically, in the energization interrupting means 121, as shown in FIG. 11, the first energization time (T0) of the power supply voltage is set to the required time for the solenoid 39 to start and become in a steady state. For example, T0 is set to 0.1 to 0.5 sec.

Each energization time (T1) that is intermittent after the first energization time and the non-energization time is set to be shorter than the initial energization time.
Further, the energization time (T1) and the non-energization time (T2) that are interrupted after the first energization time are set to predetermined repeated times.
For example, T1 = 0.1 msec and T2 = 0.8 msec are set.
Each time setting described above is set to an appropriate duty ratio and cycle so that the solenoid valve maintains a steady state and does not return to the original state by the spring 40.

  In the power supply controller 120, when the pump 10 is electrically driven by the same power source and the pump drive and the solenoid 39 activation are synchronized, a delay time Ta is set for the solenoid activation. For example, Ta = 0.2 sec. In the electric pump, the load at the time of starting becomes large. However, since the voltage is not supplied to the solenoid 39 during the delay time at the time of starting, the load for starting the solenoid 39 is not added. Therefore, labor can be saved.

The energizing / interrupting means 121 supplies a pulse signal corresponding to the energizing time and non-energizing time of the power supply voltage, and energizes and deenergizes the power supply voltage in accordance with the pulse signal from the pulse signal transmitting circuit. And a switch circuit.
The pulse signal transmission circuit is configured to include a microcomputer that is activated when the power supply voltage is supplied, and, as shown in FIG. 11, by the function of the CPU, the first energization time (T0) of the above power supply voltage, the first A pulse signal (drive signal) corresponding to the energization time (T1) and the non-energization time (T2) that are interrupted after the energization time is transmitted. The microcomputer also has a function of sending a pulse signal delayed by a time corresponding to the delay time Ta.

  Therefore, when the lubricating oil supply device S according to the embodiment is used in the lubrication system according to the embodiment, as shown in FIG. 1, the first pipeline is connected to the secondary side first pipeline port 33 of the switching valve 30. P1 is connected, and the second pipe P2 is connected to the secondary side second pipe port 34. In this case, compared with the case where the switching valve 30 is provided separately, piping work becomes easy and installation work efficiency is improved.

  Next, when lubrication is performed by the lubrication system and the lubricating oil supply device S according to this embodiment, the following is performed. Here, as shown in FIG. 8, the lubricating oil supply device S is controlled by the controller 50 in the first pipeline supply depressurization mode Mt1, the stop mode Mr, the second pipeline supply depressurization mode Mt2, the stop mode Mr, A case will be described in which the one-line supply depressurization mode Mt1 and the stop mode Mr are operated as one cycle.

  First, when the controller 50 operates the lubricating oil supply device S from the stop mode Mr (FIG. 6A) to the first pipeline supply depressurization mode Mt1 (FIG. 6B), FIG. 6B and FIG. As shown in FIG. 7, the pump 10 is turned on and the switching valve 30 is turned on in synchronization. Accordingly, as shown in FIG. 6B, in the switching valve 30, since the spool 38 is on when the solenoid 39 is energized, the primary discharge port 31 and the secondary first pipe port 33 are connected. While being connected, the primary side open port 32 and the secondary side second pipeline port 34 are blocked from the primary side discharge port 31 and the secondary side first pipeline port 33. Therefore, the lubricating oil is supplied to the first pipe line P1. As shown in FIG. 8, after a predetermined time, the pump 10 is turned off and the switching valve 30 is turned off in synchronization. As a result, as shown in FIG. 6C, in the switching valve 30, the spool 38 is returned to the steady position by the spring 40 because it is off when the solenoid 39 is deenergized, and the primary discharge port 31. The secondary side second pipe port 34 is connected, and the primary side open port 32 and the secondary side first pipe port 33 are connected. Therefore, the primary side open port 32 and the secondary side first pipe port 33 are connected, so that the hydraulic oil is removed from the lubricating oil reservoir 20 and the first pipe P1 is depressurized. During a predetermined time period when the pump 10 is turned on and the switching valve 30 is turned on, the lubricating oil is pressurized and depressurized in the first pipe P1, so that the single metering valve Vt is operated once, Discharge the lubricating oil.

  Next, as shown in FIG. 8, since the controller 50 sets the lubricating oil supply device S to the stop mode Mr, the operation of the pump 10 and the switching valve 30 are turned off, and the single metering valve Vt and the progressive metering meter are turned on. The valve Vs does not operate.

  In this state, when a predetermined time elapses, as shown in FIG. 8, the controller 50 sets the second pipe supply pressure release mode Mt2. In this case, first, when the solenoid 39 is turned off, the operation of the pump 10 is turned on and off to supply the lubricating oil to the second pipe P2. Accordingly, as shown in FIGS. 6C and 7A, in the switching valve 30, since the spool 38 is off when the solenoid 39 is not energized, the primary discharge port 31 and the secondary side The two pipeline ports 34 are connected and the primary side open port 32 and the secondary side first pipeline port 33 are connected, and the lubricating oil from the pump 10 is fed to the second pipeline P2 for a predetermined time. The Then, the solenoid 39 is turned on a predetermined time after the pump 10 is turned off (after a time lag e of several seconds). Thereby, as shown in FIGS. 6B and 7B, in the switching valve 30, since the spool 38 is on when the solenoid 39 is energized, the secondary side second pipe port 34 is primary. The second pipe P2 is depressurized by communicating with the side-by-side release port 60. During a predetermined time in the second pipe supply depressurization mode Mt2, since the lubricating oil is pressurized and depressurized in the second pipe P2, the single metering valve Vt is operated once and the lubricating oil is discharged. Discharge.

  Thereafter, as shown in FIG. 8, the controller 50 turns off the solenoid 39 and sets the lubricating oil supply device S to the stop mode Mr. The single metering valve Vt of the first pipe line P1 and the second pipe line P2 does not operate.

Next, when a predetermined time has passed, the controller 50 switches the stop mode Mr (FIG. 6A) to the first pipeline supply pressure release mode Mt1 (FIG. 6B), and operates the lubricating oil supply device S. Therefore, the lubricating oil is supplied to the first pipe line P1. As shown in FIG. 8, after a predetermined time, the pump 10 is turned off and the switching valve 30 is turned off in synchronization. Thereby, as shown in FIG.6 (c), the 1st pipe line P1 is depressurized. During a predetermined time period when the pump 10 is turned on and the switching valve 30 is turned on, the lubricating oil is pressurized and depressurized in the first pipe P1, so that the single metering valve Vt is operated once, Discharge the lubricating oil.
Further, as shown in FIG. 8, the controller 50 turns off the solenoid 39 and sets the lubricating oil supply device S to the stop mode Mr. The single metering valve Vt of the first pipe line P1 and the second pipe line P2 does not operate.

  Such a cycle is repeated to make the lubrication system function. In this case, the switching valve 30 attached to the pump 10 can be used to easily switch the second pipe P2 for depressurization by energizing the solenoid valve when the pump 10 is turned off. Can be improved. In addition, the lubricating oil can be supplied to the two systems by one pump 10, and the depressurization can be performed only by switching the switching valve 30, so that the system can be simplified and the cost can be reduced. it can.

  Next, as shown in FIG. 10, the control when the non-depressurization type progressive flow valve Vs is connected to the second pipe P2 and piped by the lubricating oil supply device S will be described. Here, as shown in FIG. 9, the controller 50 sets any one of the three modes of the stop mode Mr, the first pipeline supply depressurization mode Mt1, and the second pipeline supply non-depressurization mode Ms. Here, the lubricating oil supply device S can be operated by the controller 50 with the first pipeline supply depressurization mode Mt1, the stop mode Mr, the second pipeline supply non-depressurization mode Ms, and the stop mode Mr as one cycle. Will be described.

  First, when the controller 50 operates the lubricating oil supply device S from the stop mode Mr (FIG. 6A) to the first pipeline supply depressurization mode Mt1 (FIG. 6B), FIG. 6B and FIG. As shown in FIG. 9, the pump 10 is turned on and the switching valve 30 is turned on in synchronization. Accordingly, as shown in FIG. 6B, in the switching valve 30, since the spool 38 is on when the solenoid 39 is energized, the primary discharge port 31 and the secondary first pipe port 33 are connected. While being connected, the primary side open port 32 and the secondary side second pipe port 34 are blocked from the primary side discharge port 31 and the secondary side first pipe port 33. Therefore, the lubricating oil is supplied to the first pipe line P1. As shown in FIG. 9, after a predetermined time, the pump 10 is turned off and the switching valve 30 is turned off in synchronization. As a result, as shown in FIG. 6C, in the switching valve 30, the spool 38 is returned to the steady position by the spring 40 because it is off when the solenoid 39 is deenergized, and the primary discharge port 31. The secondary side second pipe port 34 is connected, and the primary side open port 32 and the secondary side first pipe port 33 are connected. Therefore, the primary side open port 32 and the secondary side first pipe port 33 are connected, so that the hydraulic oil is removed from the lubricating oil reservoir 20 and the first pipe P1 is depressurized. During a predetermined time period when the pump 10 is turned on and the switching valve 30 is turned on, the lubricating oil is pressurized and depressurized in the first pipe P1, so that the single metering valve Vt is operated once, Discharge the lubricating oil.

  Next, as shown in FIG. 9, since the controller 50 sets the lubricating oil supply device S to the stop mode Mr, the operation of the pump 10 and the switching valve 30 are turned off, and the single metering valve Vt and the progressive metering meter are turned on. The valve Vs does not operate. When a predetermined time elapses in this state, as shown in FIG. 9, the controller 50 operates the lubricating oil supply device S in the second pipeline supply non-depressurization mode Ms and turns off the switching valve 30 and turns on the pump 10. Turn on the operation. As a result, as shown in FIG. 6C, in the switching valve 30, since the spool 38 is off when the solenoid 39 is not energized, the primary side discharge port 31 and the secondary side second pipe port 34 And the primary side open port 32 and the secondary side first pipe port 33 are connected, and the lubricating oil from the pump 10 is fed to the second pipe P2 for a predetermined time. Therefore, in the progressive flow valve Vs, the piston is reciprocated in order by pressurization of the lubricating oil and discharges the lubricating oil. Thereafter, as shown in FIG. 9, the controller 50 sets the lubricating oil supply device S to the stop mode Mr and turns off the operation of the pump 10, so that the operation of the pump 10 and the switching valve 30 are turned off. The single metering valve Vt and the progressive metering valve Vs do not operate.

  Such a cycle is repeated to make the lubrication system function. In this case, the second conduit P2 can be easily switched to non-depressurization using the switching valve 30 attached to the pump 10, and therefore versatility can be greatly improved. Further, since the lubricating oil can be fed by one pump 10 and the depressurization can be performed only by switching the switching valve 30, the system can be simplified and the cost can be reduced.

Further, the power supply controller 120 functions in the operation of the switching valve 30 described above. The function will be described here. As shown in FIG. 10, when the power supply voltage is supplied, the microcomputer functions, and a pulse signal (drive signal) is sent from the microcomputer in the energization interrupting means 121 of the power supply controller 120. As a result, the solenoid 39 is intermittently energized and de-energized so that the solenoid 39 is activated and maintains a steady state.
At this time, as shown in FIG. 11, first, the first drive signal is sent out from the microcomputer, and this drive signal is sent out during the energization time T0. As a result, the power supply voltage is energized for the energization time T0. Since the energization time T0 is set to a required time (for example, T0 = 0.1 to 0.5 sec) for starting the solenoid 39 to be in a steady state, the solenoid valve (30) is started and is in a steady state. Become.

  During the steady state of the solenoid valve (30), a pulse signal is sent from the microcomputer of the energizing / disconnecting means 121 as shown in FIG. Specifically, first, transmission of the first drive signal is stopped, and then, after a predetermined time T2 (for example, T2 = 0.8 msec) has elapsed, the drive signal is transmitted again, and the predetermined time T1 (for example, T1 = 0.1 msec) has elapsed. Thereafter, transmission of the drive signal is stopped. In this way, the drive signal is sent and stopped until the supply of the power supply voltage is stopped. As a result, the power supply voltage is intermittently supplied to the solenoid 39 in accordance with the regularly energized time T1 (for example, T1 = 0.1 msec) and the non-energized time T2 (for example, T2 = 0.8 msec).

  At this time, in the lubrication system, when the pipe size of the first pipe line P1 or the second pipe line P2 is large, that is, when the pipe length becomes long or the number of single metering valves Vt increases, It is necessary to lengthen the steady time after starting the solenoid valve until the lubricating oil reaches the end sufficiently or until the pressure is sufficiently released. However, the supply of the power supply voltage to the solenoid 39 is intermittently performed. Therefore, troubles such as the operation of a safety mechanism (thermal fuse) due to heat generation can be prevented, and a sufficient time can be secured by setting a long stationary time after starting the solenoid valve.

  This means that even if a solenoid having a large capacity is not used, the solenoid 39 can be handled with a capacity as small as possible. Therefore, the device is small, low in cost, and low in power consumption. It can be done. For example, in a conventional solenoid valve that only allowed an operating time of 3 min at the maximum, an operating time of 10 min or longer can be allowed.

  In the above embodiment, the lubrication system and the lubricating oil supply device S have been described as applied to a resin or metal injection molding machine. However, the present invention is not necessarily limited to this and can be applied to any device. It may be changed as appropriate. In the embodiment, the case where grease is used as the lubricating oil in the lubricating system and the lubricating oil supply device S has been described. However, the present invention is not necessarily limited thereto, and may be applied to the case of oil. Of course. In addition, when the pressures of the first pipe P1 and the second pipe P2 are different, a relief valve is provided for each pipe, or the relief is switched in synchronization with the switching of the switching valve in the pump. What is necessary is just to incorporate a valve.

It is a figure which shows the lubrication system and lubricating oil supply apparatus which concern on embodiment of this invention. It is a front view which shows the lubricating oil supply apparatus which concerns on embodiment of this invention. It is side surface sectional drawing which shows the lubricating oil supply apparatus which concerns on embodiment of this invention. It is a bottom view which shows the pump of the lubricating oil supply apparatus which concerns on embodiment of this invention. It is a figure which shows the switching valve of the lubricating oil supply apparatus which concerns on embodiment of this invention, (a) is a top view, (b) is a front view. It is sectional drawing which shows the operating state of the switching valve of the lubricating oil supply apparatus which concerns on embodiment of this invention, (a) is a stop mode (2nd pipeline supply non-depressurization mode, 2nd pipeline supply depressurization mode) (B) is a diagram showing the state of the first pipe supply depressurization mode (at the time of depressurization in the second pipe supply depressurization mode), (c) is the second pipe supply depressurization mode It is a figure which shows the state of a mode (2nd pipeline supply non-depressurization mode, stop mode). It is a top sectional view showing the operating state of the switching valve of the lubricating oil supply device concerning an embodiment of the invention, and (a) is at the time of depressurization in the 1st line supply depressurization mode (the 2nd line supply depressurization) FIG. 8B is a diagram illustrating a state during discharge in the mode, and FIG. 5B is a diagram illustrating a state during decompression in the second conduit supply decompression mode. It is a timing chart figure which shows an example of the operation flow of the switching valve of a lubrication system concerning an embodiment of the invention, a pump, a single fixed valve of the 1st pipe line, and a single fixed valve of the 2nd pipe line. It is a timing chart figure which shows an example of the operation | movement flow of a switching valve, a pump, a single metering valve, and a traveling metering valve when a traveling metering valve is used for the 2nd pipe line of a lubrication system. It is a block diagram which shows the structure of a power supply controller in the lubricating oil supply apparatus which concerns on embodiment of this invention. It is a graph which shows the state of the voltage which a power supply controller controls in the lubricating oil supply apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the lubrication system and lubricating oil supply apparatus which concern on a prior art.

Explanation of symbols

S Lubricating oil supply device Vt Single metering valve Vs Progressive metering valve P1 First pipe P2 Second pipe 10 Pump 11 Piston 12 Cylinder 13 Drive motor 14 Cam mechanism 15 Mounting portion 16 Discharge port 17 Return port 20 Lubricating oil storage Part 21 Cartridge 22 Cartridge mounting part 23 Cover 30 Switching valve 31 Primary side discharge port 32 Primary side open port 33 Secondary side first pipe port 34 Secondary side second pipe port 35 Mounted part 36 Empty port 37 Plug 38 Spool 39 Solenoid 40 Spring 41 Female screw 42 Mounting hole 50 Controller 60 Primary side separate opening port 120 Power supply controller 121 Energizing / interrupting means Mr Stop mode Mt1 First pipe supply pressure release mode Mt2 Second pipe supply pressure release mode Ms 2-pipe supply non-depressurization mode

Claims (4)

In a lubrication system having two systems of pipelines, a first pipeline through which lubricating oil is fed and a second pipeline through which lubricating oil is fed,
The first pipe and the second pipe are provided in parallel, and one pump for supplying lubricating oil to the first pipe and the second pipe, and the pump is integrally attached to the pump and connected and switched. A switching valve that enables the lubricating oil from the pump to be fed to either the first pipe or the second pipe,
A primary side discharge port connected to the discharge port of the pump, a primary side open port where the lubricating oil reservoir opens to the side, and a secondary side first pipe connected to the first pipe A secondary side second pipe port connected to the port and the second pipe line, and connects the primary side discharge port and the secondary side first pipe port when energized to turn on the primary side The primary side discharge port and the secondary side second pipe port are disconnected from the primary side discharge port and the secondary side first pipe port, and the primary side discharge port and the secondary side second pipe are turned off when the power is turned off. A solenoid valve that connects the primary port and the secondary first port port together with the primary port.
To the solenoid valve, set another primary by opening port above lubricating oil reservoir through the secondary side second conduit port communicating when on being energized is crocodile opened,
A stop mode in which the pump and the solenoid valve are turned off and the secondary side first pipe port is communicated with the primary side open port to depressurize the first pipe; and the pump is turned on. , Off and the solenoid valve on and off in synchronization, the first pipe supply pressure release mode for supplying lubricating oil to the first pipe line, and the pump operation on and off when the solenoid valve is off. The second pipe supply non-depressurization mode for supplying lubricating oil to the second pipe and supplying the lubricating oil to the second pipe by turning on and off the pump when the solenoid valve is turned off. And a second line supply depressurization mode in which the solenoid valve is turned on after the pump is turned off to communicate the secondary side second line port with the primary side separate release port and depressurize the second line. of Lubrication system comprising the configurable controller to one of One mode. The valves connected to the first and second pipes are reciprocated by pressurization and depressurization of the lubricating oil to discharge the lubricating oil and one discharge corresponding to the piston. 2. The lubrication system according to claim 1, wherein the lubrication system comprises a single metering valve having an outlet. In the lubricating oil supply apparatus capable of feeding the lubricating oil to the two lines of the first pipeline through which the lubricating oil is fed and the second pipeline through which the lubricating oil is fed,
One pump that feeds the lubricating oil stored in the lubricating oil reservoir to the first pipe and the second pipe, and the pump that is integrally attached to the pump and connected to be switched, and the first pipe and the second pipe A switching valve that enables the lubricating oil from the pump to be fed to any one of the two pipelines and that allows the first pipeline to be depressurized when not connected to the first pipeline;
A primary side discharge port connected to the discharge port of the pump, a primary side open port where the lubricating oil reservoir opens to the side, and a secondary side first pipe connected to the first pipe A secondary side second pipe port connected to the port and the second pipe line, and connects the primary side discharge port and the secondary side first pipe port when energized to turn on the primary side The primary side discharge port and the secondary side second pipe port are disconnected from the primary side discharge port and the secondary side first pipe port, and the primary side discharge port and the secondary side second pipe are turned off when the power is turned off. A solenoid valve that connects the primary port and the secondary first port port together with the primary port.
The solenoid valve is provided with another primary side separate opening port through which the secondary side second pipe port communicates when energized and the lubricating oil reservoir opens to the side.
A stop mode in which the pump and the solenoid valve are turned off and the secondary side first pipe port is communicated with the primary side open port to depressurize the first pipe; and the pump is turned on. , Off and the solenoid valve on and off in synchronization, the first pipe supply pressure release mode for supplying lubricating oil to the first pipe line, and the pump operation on and off when the solenoid valve is off. The second pipe supply non-depressurization mode for supplying lubricating oil to the second pipe and supplying the lubricating oil to the second pipe by turning on and off the pump when the solenoid valve is turned off. And a second line supply depressurization mode in which the solenoid valve is turned on after the pump is turned off to communicate the secondary side second line port with the primary side separate release port and depressurize the second line. of One of the lubricating oil supply device characterized by comprising a controller that can be set to either mode. 4. The lubricating oil supply device according to claim 3, wherein the switching valve is detachable from the pump.

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