TW201923277A - Abnormality detection device for lubrication system - Google Patents

Abstract

This abnormality detection device is provided with: a plurality of flow detectors 30 that detect the flow of lubricating oil by opening/closing respective valve bodies 40; a temperature sensor S that detects the temperature of the lubricating oil; and a management unit 60 that conducts abnormality management of a lubricating system J on the basis of the detected temperature of the temperature sensor S and opening/closing of the valve bodies 40 of the flow detectors 30. The management unit 60 is provided with: an opening/closing detection means 62 for detecting opening/closing of the valve bodies 40 of the flow detectors 30; an opening start time calculation means 63 for calculating the opening start time of the valve bodies 40; an opening start time determination means 66 for determining whether the opening start time of the valve bodies 40 is within an appropriate opening start time range derived from the correlation with the temperature of the lubricating oil; and an abnormality determination means 67 for determining an abnormality when the opening start time determination means 66 determines that the opening start time is outside the range for at least one of the flow detectors 30.

Description

Abnormal detection device of lubrication system

The present invention relates to, for example, an abnormality detection device for a lubrication system that is provided in an industrial machine or a work machine, such as an injection molding machine, to detect an abnormality in a lubrication system that supplies lubricating oil such as grease or oil.

Generally, as shown in FIG. 13, for example, the injection molding machine M is provided with a lubrication system that supplies lubricating oil such as grease or oil. The injection molding machine M includes an injection section 2 and a mold clamping section 3 on the machine table 1. The injection unit 2 includes an injection cylinder 6 that heats and melts the resin from the hopper 4 and injects the resin into the mold 5 of the mold clamping unit 3 with a screw (not shown). The injection unit 2 includes an injection driving unit 7 including a rotation mechanism for rotationally driving the screw in the injection cylinder 6 and a ball screw mechanism B that moves the screw back and forth; and a forward and backward driving unit 8 including the injection cylinder 6 forward and backward Moving ball screw mechanism B. On the other hand, the mold clamping unit 3 includes: a fixed plate 10 that supports a fixed mold 5a fixed to the machine table 1; a movable plate 11 that supports a movable mold 5b that is movable in the axial direction relative to the fixed plate 10; an elbow A joint mechanism T is provided between the movable plate 11 and the rear side plate 12 and drives the movable plate 11 in a mold closing direction or a mold opening direction; and a driving unit 13 including a ball screw mechanism B that drives the toggle mechanism T.

In the injection molding machine M, a lubrication system J is used to supply lubricating oil such as grease or oil to a required lubrication site L. The lubricating part L is provided at each of the rotating part including the shaft of the toggle mechanism T and the bearing, the screw shaft including the ball screw mechanism B, and the meshing part of the nut engaged with the screw shaft via the ball. As shown in FIG. 13, the lubrication system J is provided with, for example, a lubricating pump 20 for supplying lubricating oil. A plurality of dosing valves V operated by pressurizing and depressurizing the lubricating oil are mounted on a connection surface 21. The main pipe 22 for supplying the lubricating oil from the lubricating pump 20 is formed with a hole-shaped lubrication port P in a mechanical member provided with a lubrication part L. The oil supply pipe 23 to the lubrication port P is connected to each of the dosing valves V for lubrication. The part L is intermittently supplied with the lubricating oil sprayed from each dosing valve V. For example, the lubricating port P of the toggle mechanism T is formed in a housing that holds the bearing, and the lubricating port P of the ball screw mechanism B is formed in a nut. The flow rate of each injection of the metering valve V is, for example, in the range of 0.005 cc to 1 cc. Several types are prepared, and one or a plurality of types are selected from these in accordance with the lubrication portion L.

This lubrication system J is provided with an abnormality detecting device for detecting abnormality of the lubrication system, and observes whether the lubricating oil is normally supplied for safety. As the abnormality detection device, for example, a flow detector Ka disclosed in Japanese Patent Application Laid-Open No. 53-16743 can be used.

As shown in FIG. 14, the flow detector Ka includes a body 100 including an insulator. The body 100 includes a fluid space E having an inner surface of a cylinder through which lubricating oil can pass. The body 100 is formed at one end of the fluid space E. A lubricating oil supply port 102 having a lubricating oil supply opening 101 centered on a central axis P of the fluid space E is formed at a side portion of the body 100 with a lubricating oil discharge port 104 having a discharge opening 103 communicating with the fluid space E. In addition, the body 100 is provided with one electrode 105 that is a forming member of the supply opening 101 and includes a conductor, and is provided with an exposed portion 106 that is exposed at the other end side of the fluid space E and is insulated from one electrode 105 and includes a conductor. Another electrode 107. The body 100 houses a valve body 110 containing a conductor in the fluid space E. The valve body 110 moves along the central axis P of the fluid space E to abut the opening edge portion 108 of the supply opening 101 to close the supply opening 101, and another The side is separated from the supply opening 101 and the supply opening 101 is opened. In the fluid space E, a coil spring 111 containing a conductor is housed. One end of the coil spring 111 is connected to the valve body 110 and the other end is connected to the exposed portion 106 of the other electrode 107. The coil spring 111 is constantly springed in the direction of closing the supply opening 101. Push the valve body 110. On the other electrode 107, the valve body 110 has the front end 112 protruding and slidably inserted along the axis of the central axis P of the fluid space E, and one end having a coil spring 111 is fixed on the base end side. The cylindrical guide member 114 on the side slide hole 113. The lubricating oil flow detection device Ka constitutes a so-called check valve that is opened and closed by the valve body 110.

The abnormality detection device using the flow detection device Ka is, for example, a flow detection device Ka attached to each lubrication port P, and the oil supply pipe 23 is connected thereto. Each flow detection device Ka is connected to a management unit (not shown) via a wiring 115 connected to the one electrode 105 and a wiring 116 connected to the other electrode 107. This management unit always applies voltage to an electrical circuit consisting of one electrode 105, valve body 110, coil spring 111, and another electrode 107, and electrically detects the connection when valve body 110 of the electrical circuit is closed and when it is opened. Shut down. When no opening or closing is detected, an abnormality is reported. [Prior Art Literature] [Patent Literature]

Patent Document 1: Japanese Utility Model Publication No. 53-16743

On the other hand, in the abnormality detection device using the above-mentioned lubricating oil flow detection device Ka, in the lubrication system J, the flow detection device Ka is connected to the oil supply pipe 23 from the quantitative valve V to the lubrication point L, and when the lubrication is detected When the oil flows, even if the main pipe 22 or the oil supply pipe 23 leaks, plugs, and the oil in the valve V is blocked due to other reasons, the oil still flows slightly or excessively flows, flows The detection device Ka detects the flow of the lubricating oil and judges it to be normal, so that there is a problem that a correct abnormality determination cannot be performed.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide an abnormality detection device for a lubrication system that can accurately determine abnormalities based on the opening and closing detection of a valve body as many aspects as possible.

In order to achieve the above-mentioned object, the abnormality detection device of the lubrication system of the present invention is provided in the lubrication system. The lubrication system starts and stops the lubrication pump. When starting, the self-lubrication pump feeds lubricating oil to the main pipe and is self-connected to the main pipe. The plurality of quantitative valves of the piping intermittently supply lubricating oil to the lubrication ports via the oil supply piping; and the abnormality detection device of the aforementioned lubrication system is provided with: a flow detector which is provided at each of the lubrication ports and utilizes the opening and closing of the internal valve Detecting the flow of lubricating oil; a temperature sensor that detects the temperature of the lubricating oil; and a management department that performs abnormalities of the lubricating system based on the opening and closing of the valve body of each of the flow detectors and the temperature detected by the temperature sensor. And management; and the management unit includes: a start-stop identification mechanism that recognizes the start and stop of the lubricating pump; an open-close detection mechanism that detects the opening and closing of the valve body of each of the flow detectors; an opening start time calculation mechanism that Each of the flow detectors is calculated from the start of the start-stop identification mechanism to the above. The closing detection mechanism detects the opening start time until the valve body is opened; the correlation relationship memory mechanism, which stores the correlation between the temperature of the lubricating oil and the appropriate and appropriate opening start time range of the valve body for each of the above flow detectors; The time range deriving mechanism derives an appropriate opening start time range based on the temperature detected by the temperature sensor of each of the flow detectors based on the correlation data memorized in the correlation relationship memory mechanism; the opening start time determination mechanism, which A flow detector judges that the opening start time calculated by the opening start time calculation mechanism is within or outside the appropriate opening start time range derived by the appropriate opening start time range deriving mechanism; and an abnormality judging mechanism that determines when the opening start time judging mechanism is When at least one of the flow detectors is determined to be out of range, it is determined to be abnormal.

Therefore, when the lubrication pump of the lubrication system is started and the lubricating oil is supplied to the main pipe, the lubricating port is supplied with lubricating ports from a plurality of quantitative valves connected to the main pipe through the oil supply pipe. In response to this, in the flow detector, the lubricating oil acts on the valve body inside and the valve body becomes open, and the lubricating oil is supplied to the lubrication port. When the supply of lubricating oil from the metering valve is stopped, the valve body returns and closes. The flow detector uses the opening and closing of the valve body to detect the flow of lubricating oil. On the other hand, the temperature sensor detects the temperature of the lubricating oil.

In the management department, the start and stop identification mechanism recognizes the start and stop of the lubrication pump, and the opening and closing detection mechanism detects the opening and closing of the valve body of the flow detector. In addition, the opening start time calculation means calculates an opening start time for each flow detector from the start of the start and stop identification means to the detection until the opening and closing detection means detects the opening of the valve body. On the other hand, the correlation relationship memory mechanism memorizes the correlation between the temperature of the lubricating oil and the appropriate and appropriate opening start time range of the valve body for each flow detector, and the appropriate opening start time range derivation mechanism detects based on the temperature sensor. The output temperature is derived from the appropriate opening start time range of the temperature stored in the correlation memory. Moreover, the opening start time judging means judges that each of the flow detectors has an opening start time calculated by the opening start time calculation means, and the opening start time calculated by the opening opening time range is within or outside the appropriate opening start time range derived by the derivation means, and when it is judged that it is within the range. It is normal, and when it is judged that it is out of range, the abnormality judgment mechanism judges it as abnormal.

Therefore, since the opening start time of the valve body is determined to be within or outside the appropriate opening start time range that has a relationship with the temperature of the lubricating oil, the abnormality of the lubrication system can be determined according to the length of the valve body opening start time. If it is judged that the opening start time of the valve body is outside the proper opening start time range, it can be judged that certain obstacles have occurred in the lubrication system.

Therefore, according to need, the opening start time judging means is provided to judge whether the opening start time is smaller than the minimum value of the appropriate opening start time range derived by the appropriate opening start time range deriving mechanism, or whether it is larger than the appropriate opening start time range. And the function for judging each of the flow detectors separately in the abnormality judging mechanism, that is, when the opening start time judging mechanism judges that the opening start time is smaller than the minimum value, it judges as " "Early start abnormality", when it is determined that the above-mentioned opening start time is greater than the maximum value, it is judged as "delayed start abnormality".

That is, in the case where the valve body of the flow detector is opened earlier than the appropriate opening start time, the "early start abnormal" condition can be known, for example, the wear of the sliding bearing on the lubrication port side can affect the lubrication system. In addition, if the "early start abnormality" affects all the flow detectors, for example, it is possible to know the abnormality of the lubricating oil, such as the low viscosity of the lubricating oil. Further, in a case where the valve body of the flow detector has a more appropriate opening start time and the "delayed start abnormality" that delays the start of opening, for example, the load on the oil piping increases, and the abnormality can be known. Furthermore, when the valve bodies of all the flow detectors have a more appropriate opening start time and the delay of the start of opening, for example, it is known that the main piping is damaged, or a large amount of air is mixed into the main piping, and the main piping is abnormal. As a result, it is possible to correctly determine abnormalities involving various aspects, and the reliability of abnormality detection can be improved. In addition, the type of abnormality can be known, and appropriate measures can be taken.

Furthermore, according to need, the abnormality judging means has a function of determining "all early-starting abnormalities" when all of the flow detectors are "early-starting abnormalities", and determining "all delayed-starting abnormalities" when it is "delayed-starting abnormalities". . By this, the type of abnormality can be specified and known, and further appropriate measures can be taken. For example, in the case of "all early start abnormalities" where the valve bodies of all flow detectors are opened earlier than the appropriate opening start time, it is possible to know the abnormality of the lubricating oil such as the low viscosity of the lubricating oil. In addition, in the case of "all delayed start abnormalities" where the valve bodies of all flow detectors have a more appropriate opening start time and delayed opening start, for example, it is known that the main piping is broken or a large amount of air is mixed, such as the main piping is abnormal.

In addition, as required, the management unit includes: an operating time identification mechanism that recognizes the operating time from the start of the lubrication pump to the stop; and a non-detection notification mechanism that turns on each flow detector even if it exceeds the above. The operating time identification mechanism notifies the situation when the operating time identified by the operating time detection mechanism does not detect the opening of the valve body; and the abnormality judging mechanism is provided with a notification that each of the flow detectors is notified by the opening non-detection notification mechanism. A function that does not detect the valve body's "unopen abnormality" when it is not detected. With this, when it is judged as "not opening abnormality", for example, abnormality such as clogging of a valve or a fuel supply pipe can be known. Therefore, the type of abnormality can be further specified and known, and further appropriate measures can be taken.

At this time, the management unit is provided with a closing non-detection notification mechanism. The closing non-detection notification mechanism does not detect the valve body closing even if each of the flow detectors exceeds the operating time identified by the operating time identification mechanism. At this time, such a situation is notified; and the abnormality judging mechanism is effective when the closing non-detection notification mechanism notifies that the above-mentioned each flow detector does not detect the closing of the valve body is valid. With this, when it is judged as "not closing abnormality", for example, the abnormality of the flow detector itself can be known. The type of abnormality can be further specified and known, and further appropriate measures can be taken.

Furthermore, as required, the management unit is provided with: an operating time identifying mechanism that recognizes the operating time from the start of the lubricating pump until it stops; and an opening and closing times counting mechanism that counts from the start of the lubricating pump until it stops. During the running time, the number of openings and closings of the valve body detected by the above-mentioned opening and closing detection mechanism is counted for each of the flow detectors described above; the appropriate opening and closing times memory mechanism, in the operating time from the start of the lubrication pump to the stop, the Each of the flow detectors memorizes the opening and closing times of the valve body appropriately; and the opening and closing times judging mechanism that judges the opening and closing times counted by the opening and closing times counting mechanism for each of the flow detectors as the appropriate opening and closing memory memorized by the appropriate opening and closing times memory mechanism The number of times is within or outside the range; and the abnormality judging mechanism adopts a structure having a function of determining an abnormality when the opening and closing frequency judging mechanism judges that at least any of the flow detectors is out of range. For example, when it is larger than the range of suitable opening and closing times, it can be known that an abnormality such as an increase in the oil load is caused.

At this time, according to need, the opening and closing times judging mechanism is provided with a function of judging whether the opening and closing times is less than the minimum value of the appropriate number of times range memorized by the appropriate opening and closing times memory mechanism and whether it is greater than the maximum value of the appropriate number of times range; and The abnormality judging mechanism has the function of judging each of the flow detectors separately, that is, when the opening and closing times judging mechanism judges that the opening and closing times is less than the minimum value, it judges as "small number of abnormalities", and when it judges that the opening and closing times is greater than At the maximum value, it is judged as "multiple-time abnormality". In this way, the type of abnormality can be further specified and known, and further appropriate measures can be taken.

As explained above, according to the present invention, since the opening start time of the valve body is determined to be within or outside the appropriate opening start time range having a relationship with the temperature of the lubricating oil, the length of the opening start time of the valve body can be judged Abnormal lubrication system. If it is judged that the opening start time of the valve body is outside the proper opening start time range, it can be judged that certain obstacles have occurred in the lubrication system. Therefore, the abnormality judgment can be performed accurately based on as many aspects as possible of the valve body opening and closing detection, and the reliability of management can be improved.

Hereinafter, an abnormality detection device of a lubrication system according to an embodiment of the present invention will be described based on the drawings. The abnormality detection device K of the lubrication system of the embodiment shown in Figs. 1 to 7 is applied as the lubrication system J of the injection molding machine M described above.

As shown in FIG. 13, the injection molding machine M is provided with an injection section 2 and a mold clamping section 3 provided on the table 1. The injection unit 2 includes an injection cylinder 6 that heats and melts the resin from the hopper 4 and injects the resin into the mold 5 of the mold clamping unit 3 with a screw (not shown). The injection unit 2 includes an injection driving unit 7 including a rotation mechanism for rotationally driving the screw in the injection cylinder 6 and a ball screw mechanism B that moves the screw back and forth; and a forward and backward driving unit 8 including the injection cylinder 6 forward and backward Moving ball screw mechanism B. On the other hand, the mold clamping unit 3 has a structure including a fixed plate 10 that supports a fixed mold 5 a fixed to the machine table 1, and a movable plate 11 that supports the movable plate 11 in the axial direction relative to the fixed plate 10. A movable movable mold 5b; a toggle mechanism T provided between the movable plate 11 and the rear side plate 12 to drive the movable plate 11 in a mold closing direction or a mold opening direction; and a drive unit 13 provided with a drive of the toggle mechanism T The ball screw mechanism B.

Furthermore, as shown in FIGS. 3 and 5, a lubricating system J is used to supply lubricating oil such as grease or oil to a required lubrication portion L. The lubricating portion L is supplied with lubricating oil through a hole-shaped lubrication port P formed in a mechanical member provided with the lubricating portion L. The lubricating part L is provided at a rotating portion including the shaft 15 of the toggle mechanism T and the bearing 16, a screw shaft including a ball screw mechanism B, and an engaging portion (not shown) of a nut that meshes with the screw shaft through the ball. . In the toggle mechanism T, the lubrication port P is formed in the housing 17 as a mechanical member covering the bearing 16, and in the ball screw mechanism B, it is formed in a nut. In addition, in FIG. 3 and FIG. 5, the lubricating part L indicates the rotation of the shaft 15 including the toggle mechanism T and the rotation of the bearing 16. Parts, the illustration is omitted.

The lubricating system J is as shown in Fig. 1, Fig. 2 and Fig. 13, for example, it is provided with a lubricating pump 20 for supplying lubricating oil, and a plurality of quantitative valves V (V1 ~ Vn) It is mounted on the connection surface 21, and the connection surface 21 is connected to a main pipe 22 for supplying lubricating oil from the lubrication pump 20. In addition, a hole-shaped lubricating port P is formed on a mechanical member provided with a lubricating portion L. An oil supply pipe 23 reaching the lubricating port P is connected to each dosing valve V, and the lubricating portion L is intermittently supplied with lubricating oil sprayed from each dosing valve V. . For example, the lubricating port P of the toggle mechanism T is formed in a housing that holds the bearing, and the lubricating port P of the ball screw mechanism B is formed in a nut.

The flow rate of each injection of the metering valve V is, for example, in the range of 0.005 cc to 1 cc. Several types are prepared, and one or a plurality of types are selected for piping in accordance with the lubrication portion L. The lubrication pump 20 is driven and controlled by a management unit 60 described later. The interruption time of the lubricating pump 20 is determined as a required time, and the interruption time is set by, for example, a timer provided in the management unit 60. In addition, the operating time of the lubricating pump 20 is also set to an appropriate time during which all of the quantitative valves V can be operated, for example, the operating time is set by a timer.

The abnormality detection device K includes flow detectors 30 (SM1 to SMn) that are provided for each of the dosing valves V (Vn1 to Vn) and detect whether or not the lubricating oil is reliably supplied from the corresponding dosing valve V to the lubrication point L. As shown in FIG. 1 to FIG. 5, the flow detector 30 is attached to the hole-shaped lubrication port P via the adapter 31. Specifically, as shown in FIG. 4, the flow detector 30 includes a body 32 having a fluid space E having a cylindrical inner surface through which lubricating oil can pass. A lubricating oil supply port 34 is formed in the body 32. The lubricating oil supply port 34 has a supply opening 33 centered on the central axis of the fluid space E at one end of the fluid space E, and is formed in the body 32. The lubricating oil discharge port 36 is provided with a discharge opening 35 communicating with the fluid space E and connected to the flow path of the adapter 31. Further, the body 32 is provided with one electrode Da containing a conductor having a contact portion 37 exposed on one end side of the fluid space E, and an exposed portion 38 having a second end side exposed on the fluid space E. And the other electrode Db containing a conductor is insulated from one electrode Da. The main body 32 is provided with a bush 39 including a conductive body such as a metal forming the supply opening 33, and the bush 39 and / or the periphery thereof is constituted as one electrode Da of the contact portion 37 exposed at one end side of the fluid space E.

In the fluid space E, a valve body 40 containing a conductor is housed. The valve body 40 moves along the central axis of the fluid space E and abuts a contact portion 37 of one electrode Da to close the supply opening 33 and the contact portion. 37 is separated and the supply opening 33 is opened. In the fluid space E, a coil spring 41 containing a conductor is housed. One end of the coil spring 41 is connected to the valve body 40 and the other end is connected to the exposed portion 38 of the other electrode Db. The valve is constantly pushed toward the supply opening 33.体 40。 Body 40. The flow detector 30 is provided with a guide member 42 that is an insulator containing a resin or the like, which is attached to the valve body 40 and is provided in the fluid space E. This guide member 42 secures a lubricating oil flow path from the supply opening 33 to the discharge opening 35 and is slidably formed on the inner surface of the cylinder of the fluid space E. The guide member 42 faces one end face of the fluid space E and receives the supply. The receiving surface 43 of the lubricating oil of the opening 33 has a top surface 44 opposed to the other end surface of the fluid space E.

Thereby, the flow detector 30 is configured to connect and change the electrical detection valve body 40 when it is closed in an electrical circuit composed of one electrode Da, the valve body 40, the coil spring 41, and the other electrode Db. It can detect the flow of lubricating oil in order to cut off when it is opened. The flow detector 30 is connected to the lubrication port P via an adapter 31. In detail, a female screw 45 is formed in the ejection port 36 of the flow detector 30, and a female screw 46 is also formed in the lubrication port P. The adapter 31 has a flow path in the center thereof, and is formed on one side in the axial direction. A male thread 47 screwed into the female thread 44 of the discharge port 36 is formed with a male thread 48 screwed into the female thread 46 of the lubrication port P on the other side in the axial direction. With this, the adapter 31 screw-fits the male thread 47 on one side with the ejection port 36, and the male thread 48 on the other side with the female thread 46 of the lubrication port P, thereby mounting the flow detector 30. At the lubrication point L.

The abnormality detection device K includes a temperature sensor S that detects the temperature of the lubricating oil as the lubricating oil. As the temperature sensor S, for example, a well-known temperature sensor of a type in which the output voltage increases according to the temperature can be used. The temperature sensor S detects the temperature of the lubricating oil in the groove 20 a of the lubrication pump 20 as shown in FIG. 1.

As shown in FIGS. 1, 6, and 7, the abnormality detection device K includes a management unit 60 that performs abnormality management of the lubrication system J based on detection signals from the flow detector 30 and the temperature sensor S. The management unit 60 is realized by a function of a CPU or the like, as shown in FIGS. 6 and 7. The management unit 60 includes a start-stop identification mechanism 61 that recognizes the start and stop of the lubrication pump 20, and an open-close detection mechanism 62 that detects each flow detection. The opening and closing of the valve body 40 of the device 30; the opening start time calculation mechanism 63, which calculates the opening start of each flow detector 30 since the start and stop identification mechanism 61 recognizes and starts until the opening and closing detection mechanism 62 detects the opening of the valve body 40 Time; correlation relationship memory mechanism 64, which memorizes the correlation between the temperature of the lubricating oil of each flow detector 30 and the appropriate appropriate opening start time range of the valve body 40; the appropriate opening start time range derivation mechanism 65, which is based on each flow detection The temperature detected by the temperature sensor S of the sensor 30 derives an appropriate opening start time range of the temperature memorized in the correlation relationship memory mechanism 64; the opening start time judging mechanism 66 judges the opening start time calculation mechanism 63 of each flow detector 30 The calculated opening start time is within or outside the appropriate opening start time range derived by the appropriate opening start time range deriving mechanism 65. And abnormality determining means 67 which determines when the opening mechanism 66 determines the start time of at least any one of the flow detector 30 is determined to be abnormal is outside the range.

In the management unit 60, a voltage is always applied to an electric circuit composed of one electrode Da, the valve body 40, the coil spring 41, and the other electrode Db of the flow detector 30, and the opening / closing detection mechanism 62 detects when the valve body 40 is closed. Electrical connection and electrical disconnection when turned on.

Correlation The memory mechanism 64 memorizes the relationship between the temperature of the lubricating oil of each flow detector 30 and the appropriate opening start time range of the valve body 40. For example, due to the type of lubricating oil or the discharge amount of the quantitative valve V, etc. Since the lubricating parts are different, each lubricating part L is tested in advance and determined. An example is shown in FIG. 8. The minimum and maximum values of the appropriate opening start time range are obtained in advance for temperature changes.

In detail, the opening start time judging means 66 has a function of determining whether the opening start time is smaller than the minimum value of the appropriate opening start time range derived by the appropriate opening start time range deriving means 65 or whether it is larger than the maximum value of the appropriate opening start time range. The abnormality judging mechanism 67 has a function of differently judging, that is, when the opening start time judging mechanism 66 of each flow detector 30 judges that the above-mentioned opening start time is less than the minimum value, it judges as "early start abnormal", and when it judges as the above opening When the start time is greater than the maximum value, it is judged as "delayed start abnormality".

In addition, the abnormality judging mechanism 67 includes “all early start abnormalities” when all the flow detectors 30 are “early start abnormality”, and “all delayed start abnormalities” when all flow detectors 30 are “delayed start abnormality”. Functions.

Furthermore, the management unit 60 is provided with: an operating time identification mechanism 70 that recognizes the operating time from the start of the lubrication pump 20 to a stop; and the open-not-detection notification mechanism 71 that operates even if the identification time of the operating time is exceeded by the identification mechanism 70. When the opening / closing detection mechanism 62 of each flow detector 30 still does not detect the opening of the valve body 40, such a situation is notified; and when the non-detection notification mechanism 72 is closed, each of the When the opening / closing detection mechanism 62 of the flow detector 30 does not detect the closing of the valve body 40, such a situation is notified.

The abnormality judging mechanism 67 is provided with a function to judge "non-opening abnormality" when the opening / non-detection notification mechanism 71 of each flow detector 30 notifies that the valve body 40 is not opened, and has a non-detection notification when each flow detector 30 is closed. The mechanism 72 notifies the function which is judged as "non-close abnormality" when the closing of the valve body 40 is not detected.

Further, the management unit 60 includes a number of opening / closing counting mechanism 73 which counts the number of flow detectors 30 detected by the opening / closing detection mechanism 62 during the operation time from the start of the lubrication pump 20 identified by the operation time identification mechanism 70 to the stoppage. Number of opening / closing times of the valve body 40; a suitable opening / closing times memory mechanism 74, which memorizes the appropriate opening / closing times of the valve body 40 of each flow detector 30 during the operation time since the lubrication pump 20 is started until stopped; and the number of opening / closing judgments The mechanism 75 judges that the number of openings and closings counted by the number of openings and closings counting means 73 of each flow detector 30 is within or outside the range of the number of appropriate openings and closings memorized by the appropriate opening and closing times memory 74.

The suitable opening and closing frequency memory mechanism 74 stores the opening and closing times of the appropriate valve body 40 of each flow detector 30. For example, each lubricating part is different due to the type of lubricating oil or the discharge amount of the quantitative valve V. Therefore, each lubrication is preliminarily The site L is determined by testing. The minimum and maximum values of the appropriate number of opening and closing times of the valve body 40 are obtained in advance.

The abnormality judging means 67 has a function of determining an abnormality when the number of opening / closing times judging means 75 judges that the at least one flow detector 30 is out of range. In detail, the opening / closing frequency judgment means 75 has a function of judging whether the number of openings and closings is smaller than the minimum value of the range of suitable times memorized by the appropriate opening / closing times memory means 74 or whether it is larger than the maximum value of the appropriate number of times. The abnormality judging mechanism 67 has a function of distinguishing judgments respectively, that is, when the number of opening and closing times judging mechanism 75 of each flow detector 30 judges that the number of opening and closing times is less than the minimum value, it judges as "small number of times abnormal", and when it determines that the number of opening and closing times is greater than the maximum value. At that time, it was judged to be "multiple times abnormal".

The abnormality detection device K is provided with a display mechanism 80 that displays abnormal content corresponding to the determination result determined by the abnormality determination mechanism 67, as shown in FIG. 7, and the display mechanism 80 may include, for example, a monitor for screen display. The contents displayed by the display unit 80 are "normal", "early start abnormality", "delayed start abnormality", "all early start abnormality", "all delayed start abnormality", "non-open abnormality", "Do not close exception", "Several exceptions", and "Multiple exceptions". The display is performed for each number of the flow detectors 30 (SM1 to SMn). In addition, if it is determined to be abnormal, for example, the driving of the injection unit 2 and the mold clamping unit 3 may be stopped, the warning lamp may be turned on, or the alarm may be sounded. Furthermore, the management unit 60 has a function of controlling the operation of the lubrication pump 20 of the lubrication system J as described above.

Therefore, in this injection molding machine M, the injection molding unit 2 and the mold clamping unit 3 are driven to perform injection molding. However, the injection molding machine M is driven to be lubricated by the control of the abnormality detection device K and its management unit 60. The lubrication pump of system J is activated. The processing performed in the management unit 60 will be described using flowcharts shown in FIGS. 9 to 12.

As shown in FIG. 9, the temperature sensor S performs temperature detection (S101). In the management unit 60, the opening time range deriving mechanism 65 is appropriately opened for each flow detector 30 (SM1 to SMn) based on the temperature sensor S. The temperature of the detected lubricating oil is derived based on the correlation data memorized in the correlation memory mechanism 64 to derive an appropriate opening start time range of the detection temperature (S102). The appropriate opening start time range deriving mechanism 65 updates and memorizes the appropriate opening start time range one by one.

And if it is a specific time of intermittent time (S103: YES), the lubricating pump 20 is driven, and a timer is activated (S104). Thereby, lubricating oil is ejected from each dosing valve V, and lubricating oil is supplied to the lubricating part L through the flow detector 30. In the flow detector 30, the lubricating oil acts on the valve body 40 in the body 32 and the valve body 40 becomes open. The lubricating oil flows into the fluid space E from the supply opening 33 and is ejected from the ejection opening 35. After that, the valve body 40 returns and The supply opening 33 is closed. This opening and closing operation is different for each flow detector 30.

In the management unit 60, the opening / closing detection mechanism 62 first detects the opening of the valve body 40 of the flow detector 30 (S105). At this time, when the opening is not detected (No in S105), since the number of openings and closings counted by the first opening and closing number counting mechanism 73 is zero (S106: Yes), the opening of the valve body 40 is detected before the timer time comes (S107: No → S105) ). When the opening of the valve body 40 is not detected even when the timer time comes (S107: YES), after the pump is stopped (S108), the open non-detection notification mechanism 71 determines that the operation time identified by the operation time identification mechanism 70 is exceeded. However, the opening / closing detection mechanism 62 still does not detect the opening of the valve body 40 and notifies this situation. Thereby, the abnormality judging means 67 judges that "the abnormality is not opened" (S109), and displays it on the display means 80. On the other hand, if the opening of the valve body 40 is detected within the timer time (S105: YES), it is determined whether or not the opening of the valve body 40 is initial (S110). When it is the first opening (S110: YES), the process proceeds to the next step (a).

Next, description will be made with reference to the flowchart shown in FIG. 10. The opening start time calculation means 63 calculates, for each flow detector 30, the opening start time from the start and stop identification means 61 to the start of detection until the opening and closing detection means 62 detects the opening of the valve body 40 (S201). Then, the opening start time judging means 66 judges that the opening start time calculated by the opening start time calculating means 63 of each flow detector 30 is within or outside the appropriate opening start time range derived by the appropriate opening start time range deriving means 65 (S202) . If the opening start time judging mechanism 66 determines that the opening start time is outside the appropriate opening start time range (S202: NO), then it determines whether the opening start time is less than the minimum of the appropriate opening start time range derived by the appropriate opening start time range deriving mechanism 65. Value, or whether it is greater than the maximum value of the appropriate opening start time range (S203). Here, when the opening start time judging mechanism 66 judges that the opening start time is less than the minimum value (S203: YES), the abnormality judging mechanism 67 judges "early start abnormal" (S204), and when the opening start time judging mechanism 66 judges that opening starts When the time is longer than the maximum value (No in S203), the abnormality judging means 67 determines that the "delayed start error" (S205). In another invention, when the opening start time judging means 66 judges that it is within the appropriate opening start time range (S202: YES), it proceeds to the next step (b).

Next, description will be made with reference to the flowchart shown in FIG. 11. In the management unit 60, the opening / closing detection mechanism 62 detects that the valve body 40 has become closed after it has been opened (S301), and continuously detects the closing of the valve body 40 before the timer time expires (S302 No → S301). When the closing of the valve body 40 has not been detected by the timer time (S302: YES), after the pump is stopped (S303), the shutdown non-detection notification mechanism 72 determines that even if the operation time identified by the operation time identification mechanism 70 is exceeded, The opening / closing detection mechanism 62 has not detected the closing of the valve body 40, and notifies the abnormality determination mechanism 67 of this situation as "not closing abnormality" (S304), and displays it on the display mechanism 80.

On the other hand, if the closing of the valve body 40 is detected within the timer time (S301: YES), the opening and closing times counting mechanism 73 counts and accumulates the opening and closing times of the valve body 40 detected by the opening and closing detecting mechanism 62 (S305) . Then, before the timer time expires, the opening and closing of the valve body 40 is detected as described above (S306 No → c → S105 Yes → S110 No → b → S301 Yes → S305 → S306). If there is a problem in this process, it is judged as "non-open abnormality" (S109) and "non-close abnormality" (S304) as described above.

When the timer time elapses (Yes in S306), the pump (S307) stops. Then, the number of openings and closings of the valve body 40 counted by the number of openings and closings counting mechanism 73 is determined (S308), and the number of openings and closings counted by the number of openings and closings counting mechanism 73 of each flow detector 30 is determined by the number of openings and closings judging mechanism 75. The appropriate number of times of opening and closing of the memory is within or outside the range (S309). If the opening / closing times judging mechanism 75 judges that it is outside the range of appropriate opening and closing times (S309: NO), the opening / closing times judging mechanism 75 determines whether the opening and closing times is less than the minimum value of the appropriate number of times of the memory of the appropriate opening or closing times or whether it is greater than The maximum value (S310). When the number of opening / closing times of the number of opening / closing times counting means 73 is smaller than the minimum value at the opening / closing times judging means 75 of each flow detector 30 (S310: YES), the abnormality judging means 67 judges that the number of openings and closings is abnormal (S311). When the number of times is greater than the maximum value (No in S310), it is determined that "multiple number of times is abnormal" (S312). The abnormality judging means 67 displays "few times of abnormality" and "multiple times of abnormality" on the display means 80. On the other hand, when the number-of-opening-and-closing judgment means 75 determines that it is within the range of the appropriate number of openings and closings (Yes in S309), the process proceeds to the next step (f).

Next, description will be made with reference to the flowchart shown in FIG. 12. The abnormality judging mechanism 67 determines whether there is an “early start abnormality” (S401) and a “delayed start abnormality” (S402) judged by the abnormality judging mechanism 67 among all the flow detectors 30, and when there is no abnormality (S401 No, S402: No), it is judged as "normal" (S403), and it is displayed on the display mechanism 80. On the other hand, when it is determined by the abnormality judging mechanism 67 that "the abnormality started early" (S401: YES), it is determined whether or not it is included in all the flow detectors 30 (S404). "(Yes in S404), it is judged that" all start abnormally early "(S405). When not all (No in S404), it is judged as an individual abnormality (S406), and "Early start abnormality" is displayed on the display unit 80 for each number of the flow detector 30 (SM1 to SMn).

When there is a "delayed start abnormality" judged by the abnormality determination mechanism 67 (S402: YES), it is determined whether it is included in all the flow detectors 30 (S407), and when all the flow detectors 30 are "delayed start abnormality" (Yes in S407), it is determined that "all delay start errors" (S408). When not all (No in S407), it is determined that there is an individual abnormality (S409), and "delay start abnormality" is displayed on the display unit 80 for each number of the flow detector 30 (SM1 to SMn).

As shown in FIG. 7, the display means 80 displays "normal", "early start abnormality", "delayed start abnormality", "all early start abnormality", "all delayed start abnormality", "non-open abnormality", " Any one of "Do not close exception", "Few times abnormal", and "Multiple times abnormal". In addition, if any of them is abnormal, in addition to the display, for example, the driving of the injection unit 2 and the mold clamping unit 3 may be stopped, the warning lamp may be turned on, or the alarm may be activated.

Thus, in the case where the valve body 40 of the flow detector 30 is opened earlier than the appropriate opening start time, the "early start abnormal" situation, for example, the wear of the plain bearing on the lubrication port P side can affect the lubrication system J. In addition, if the "early start abnormality" affects all the flow detectors 30, for example, it can be known that the lubricant oil is abnormal such as the viscosity of the lubricant oil is too low. When the valve body 40 of the flow detector 30 has a more appropriate opening start time and the "delayed start abnormality" delays the start of opening, for example, the load on the oil supply pipe 23 is increased and the abnormality can be known. In addition, when the valve bodies 40 of all the flow detectors 30 have a more appropriate opening start time and the opening start is delayed, for example, it can be known that the main pipe 22 is damaged, or a large amount of air is mixed into the main pipe, and the main pipe is abnormal. As a result, it is possible to make an abnormality determination in various aspects, to correctly perform the abnormality determination, and to improve the reliability of the abnormality detection. In addition, the type of abnormality can be known, and appropriate measures can be taken.

In addition, in the case of "all early start abnormalities" when the valve bodies 40 of all the flow detectors 30 are opened earlier than the appropriate opening start time, for example, it is possible to know the abnormality of the lubricating oil such as the viscosity of the lubricating oil being too low. In the case where the valve body 40 of all the flow detectors 30 has a more appropriate opening start time and the "all delayed start abnormality" is delayed from the start of opening, for example, the main pipe 22 may be damaged or a large amount of air may be mixed into the main pipe. abnormal. Therefore, the kind of abnormality can be specified and known, and further appropriate measures can be taken.

In addition, when it is a "non-open abnormality", for example, an abnormality such as a valve V or a blockage of the oil supply pipe 23 can be known. Therefore, the type of abnormality can be further specified and known, and further appropriate measures can be taken. Furthermore, when it is "non-close abnormality", for example, the abnormality of the flow detector 30 itself can be known. The type of abnormality can be further specified and known, and further appropriate measures can be taken at this point. In addition, it is also possible to know the abnormality of "few times of abnormalities" or "multiple times of abnormalities". For example, if it is a "multiple number of abnormalities", it can be seen that the oil supply load increases. The type of abnormality can be further specified and known, and further appropriate measures can be taken.

In addition, in the above embodiment, the temperature sensor S is provided to detect the temperature of the lubricating oil in the groove 20a of the lubrication pump 20, but it is not necessarily limited to this. The correlation may be attached to the flow detector 30 or may be appropriately changed. Moreover, it goes without saying that the lubricating portion L is not limited to the above-mentioned portion, and may be provided at any portion. In a word, those skilled in the art can easily apply multiple changes to these examples and implementations without substantially departing from the new teachings and effects of the present invention, and these multiple changes are included in the scope of the present invention.

A number of embodiments and / or embodiments of the present invention have been described in detail. Those skilled in the art can easily apply the embodiments and / or embodiments to these examples without substantially departing from the new teachings and effects of the present invention. Multiple changes. Therefore, these multiple changes are included in the scope of the present invention.

1‧‧‧machine

2‧‧‧ Injection Department

3‧‧‧Clamping Department

4‧‧‧ Hopper

5‧‧‧mould

5a‧‧‧Fixed

5b‧‧‧ movable mold

6‧‧‧ injection cylinder

7‧‧‧ Injection drive unit

8‧‧‧ forward and backward drive unit

10‧‧‧Fixing plate

11‧‧‧ movable plate

12‧‧‧ rear side panel

13‧‧‧Drive unit

15‧‧‧axis

16‧‧‧bearing

17‧‧‧shell

20‧‧‧Lubrication pump

20a‧‧‧slot

21‧‧‧ meet

22‧‧‧Main Piping

23‧‧‧oil supply pipe

30‧‧‧ flow detector

31‧‧‧ adapter

32‧‧‧ Ontology

33‧‧‧ supply opening

34‧‧‧ supply port

35‧‧‧ spout

36‧‧‧Spout

37‧‧‧Contact Department

38‧‧‧ exposed

39‧‧‧ Bushing

40‧‧‧Valve body

41‧‧‧coil spring

42‧‧‧Guide members

43‧‧‧Receiving side

44‧‧‧Top / female thread

45‧‧‧female thread

46‧‧‧female thread

47‧‧‧Male Thread

48‧‧‧ male thread

60‧‧‧Management Department

61‧‧‧Start and stop identification mechanism

62‧‧‧Open-close detection agency

63‧‧‧ Open start time calculation mechanism

64‧‧‧Relationship Memory Organization

65‧‧‧ Appropriately open start time range export mechanism

66‧‧‧ Open start time judgment mechanism

67‧‧‧Exception Judgment Agency

70‧‧‧ running time identification mechanism

71‧‧‧ Open notification agency

72‧‧‧ Shut down non-detection notification agency

73‧‧‧Number of opening and closing counting mechanism

74‧‧‧ Appropriate opening and closing frequency memory mechanism

75‧‧‧Number of opening and closing judgment institutions

80‧‧‧Display organization

100‧‧‧ Ontology

101‧‧‧ supply opening

102‧‧‧Supply

103‧‧‧ spout

104‧‧‧Spout

105‧‧‧one electrode

106‧‧‧ exposed

107‧‧‧ another electrode

108‧‧‧ opening edge

110‧‧‧Valve body

111‧‧‧ coil spring

112‧‧‧Front end

113‧‧‧ sliding hole

114‧‧‧Guide members

115‧‧‧ Wiring

116‧‧‧Wiring

B‧‧‧ball screw mechanism

Da‧‧‧One electrode

Db‧‧‧Another electrode

E‧‧‧Fluid Space

J‧‧‧Lubrication system

K‧‧‧ anomaly detection device

Ka‧‧‧ Flow Detector / Flow Detection Device

L‧‧‧ Lubrication site

M‧‧‧ injection molding machine

P‧‧‧lubrication port / central shaft

S‧‧‧Temperature sensor

SM1‧‧‧ Flow Detector

SM2‧‧‧ Flow Detector

SM3‧‧‧ Flow Detector

SM4‧‧‧ Flow Detector

SM5‧‧‧ Flow Detector

SM6‧‧‧Flow detector

SM7‧‧‧ Flow Detector

SM8‧‧‧ Flow Detector

SMn‧‧‧ Flow Detector

T‧‧‧Elbow joint mechanism

V‧‧‧ Dosing valve / valve

V1‧‧‧ Dosing valve

V2‧‧‧ Dosing Valve

V3‧‧‧ Dosing valve

V4‧‧‧ Dosing valve

V5‧‧‧ Dosing valve

V6‧‧‧ Dosing valve

V7‧‧‧ Dosing valve

V8‧‧‧ Dosing valve

Vn‧‧‧ Dosing Valve

FIG. 1 is a diagram in which an abnormality detecting device of a lubrication system according to an embodiment of the present invention is applied to a lubrication system. FIG. 2 is a diagram showing a main part of a lubrication system to which an abnormality detecting device of a lubrication system according to an embodiment of the present invention is applied. FIG. 3 is a perspective view showing an example of mounting a flow detector used in an abnormality detecting device of a lubrication system according to an embodiment of the present invention toward a lubrication portion. 4 is a cross-sectional view showing a flow detector used in an abnormality detecting device of a lubrication system according to an embodiment of the present invention. FIG. 5 is a cross-sectional view showing an example of mounting a flow detector used in an abnormality detection device of a lubrication system according to an embodiment of the present invention toward a lubrication portion. FIG. 6 is a block diagram showing a configuration of a management unit of an abnormality detecting device of a lubrication system according to an embodiment of the present invention. FIG. 7 is another block diagram showing a configuration of a management section of an abnormality detecting device of a lubrication system according to an embodiment of the present invention. FIG. 8 is a drawing depicting an example of the correlation between the temperature of the lubricating oil of the abnormality detection device of the lubrication system according to the embodiment of the present invention and the appropriate opening start time range of the valve body. FIG. 9 is a flowchart showing a processing flow of a management unit of an abnormality detection device of a lubrication system according to an embodiment of the present invention. FIG. 10 is a flowchart showing a processing flow of a management unit of an abnormality detection device of a lubrication system according to an embodiment of the present invention. 11 is a flowchart showing a processing flow of a management unit of an abnormality detection device of a lubrication system according to an embodiment of the present invention. FIG. 12 is a flowchart showing a processing flow of a management unit of an abnormality detecting device of a lubrication system according to an embodiment of the present invention. FIG. 13 is a diagram showing a configuration example of an injection molding machine to which an abnormality detecting device of a lubrication system according to an embodiment of the present invention is applied. Fig. 14 is a sectional view showing an example of a conventional flow detector.

Claims (9)

An abnormality detection device for a lubrication system is provided in a lubrication system. The lubrication system starts and stops a lubrication pump. When starting, a self-lubricating pump supplies lubricating oil to a main pipe, and a plurality of dosing valves connected to the main pipe pass the oil feeding. The piping supplies lubricating oil to the lubrication port intermittently; and the abnormality detection device of the aforementioned lubrication system includes: a flow detector provided at each of the lubrication ports, and detecting the flow of the lubricating oil by using the opening and closing of the internal valve body; temperature A sensor that detects the temperature of the lubricating oil; and a management unit that performs abnormal management of the lubrication system based on the opening and closing of the valve body of each of the flow detectors and the temperature detected by the temperature sensor; and the management unit Including: start-stop identification mechanism, which recognizes the start and stop of the lubricating pump; an open-close detection mechanism, which detects the opening and closing of the valve body of each of the flow detectors; an opening start time calculation mechanism, which is based on each of the flow detectors described above Calculated from the start of the start-stop identification mechanism to the detection of the valve by the open-close detection mechanism Opening start time until it is opened; Correlation relationship memory mechanism, which memorizes the correlation between the temperature of the lubricating oil and the appropriate and appropriate opening start time range of the valve body for each of the above flow detectors; the appropriate opening start time range deriving mechanism, which According to the temperature detected by the temperature sensor of each of the flow detectors, based on the correlation data memorized in the correlation relationship memory mechanism, a suitable opening start time range is derived; the opening start time determination mechanism is based on each of the flow detectors. Determine that the opening start time calculated by the opening start time calculation mechanism is within or outside the appropriate opening start time range derived by the appropriate opening start time range derivation mechanism; and an abnormality judging mechanism that, when the opening start time judging mechanism is at least When a flow detector judges that it is out of range, it judges it as abnormal. For example, the abnormality detection device of the lubrication system according to claim 1, wherein the opening start time judging mechanism is provided to determine whether the opening start time is smaller than the minimum value of the appropriate opening start time range derived by the appropriate opening start time range deriving mechanism, or whether it is greater than The function of the appropriate maximum opening start time range; and the abnormality judging mechanism has a function of judging each of the flow detectors separately, that is, when the opening start time judging mechanism judges that the opening start time is less than the minimum value , It is judged as "early start abnormal", and when the opening start time judging mechanism judges that the opening start time is greater than the maximum value, it is judged as "late start abnormal". For example, the abnormality detection device of the lubrication system of claim 2, wherein the abnormality judging mechanism is provided with all the above-mentioned flow detectors as "early-start abnormality", and judged as "all early-start abnormalities", and when the above-mentioned flow detectors are all "late When "Start abnormal" function, it is judged as "all delayed start abnormal" function. If the abnormality detection device of the lubricating system according to any one of claims 1 to 3, the management section includes: a running time identification mechanism that recognizes the running time from the start of the lubricating pump to the stop of the lubricating pump; and the opening is not detected The notification mechanism notifies the situation of each of the flow detectors when the operation time identified by the operation time identification mechanism exceeds the operation time identified by the operation time identification mechanism and the valve opening is not detected by the opening and closing detection mechanism; The opening-not-detecting notification mechanism judges that the opening of the valve body is not detected for each of the flow detectors, and determines that it is a "non-opening abnormality" function. If the abnormality detection device of the lubricating system as claimed in claim 4, wherein the management section includes a closed non-detection notification mechanism, the closed non-detection notification mechanism shall, for each of the flow detectors, exceed the operation time identified by the operation time identification mechanism. When the above-mentioned opening and closing detection mechanism has not detected the closing of the valve body, such a situation is notified; and the abnormality judging mechanism is provided with the above-mentioned closed undetected notification mechanism notifying that each of the flow detectors has not detected the closing of the valve body. At this time, it is judged as the function of "do not close abnormality". For example, the abnormality detection device of the lubrication system according to claim 5, wherein the management unit includes: a running time identification mechanism that recognizes the running time from the start of the lubrication pump to the stop; the opening and closing times counting mechanism, During the running time from start to stop, each flow detector counts the number of openings and closings of the valve body detected by the opening and closing detection mechanism; a suitable opening and closing number memory mechanism, which starts and stops after the lubrication pump is started. In the running time up to that, the opening and closing times of the valve body that are appropriate for each of the flow detectors are memorized; and the opening and closing times judgment mechanism that judges the opening and closing times counted by the opening and closing times counting mechanism for each of the flow detectors is the appropriate The opening / closing times memory means memorizes the appropriate cut-off times within or outside the range; and the above-mentioned abnormality judging mechanism has a function of judging an abnormality when the opening / closing times judging mechanism judges that at least any of the flow detectors is out of range. If the abnormality detection device of the lubricating system of claim 6 is provided, the above-mentioned opening / closing times judging mechanism is provided to determine whether the opening / closing times is smaller than the minimum value of the appropriate number of times of the memory of the appropriate opening / closing times memory mechanism, or whether it is larger than the appropriate number of times. The function of the maximum value; and the abnormality judging mechanism has a function of judging each of the flow detectors separately, that is, the opening and closing times judging mechanism judges that the opening and closing times are less than the minimum value, and judges as "small number of abnormalities". When the number of openings and closings is greater than the maximum value, it is judged as "multiple number of abnormalities". For example, the abnormality detection device of the lubrication system of claim 1 or 2, wherein the management section includes: an operating time identification mechanism that identifies the operating time from the start of the lubrication pump to the stop; the opening and closing times counting mechanism, which During the running time from the start of the lubrication pump to the stop, the number of opening and closing times of the valve body detected by the above-mentioned opening and closing detection mechanism is counted for each of the above flow detectors; a suitable opening and closing number memory mechanism, which is During the running time until the stop, the number of openings and closings of the valve body that is appropriate for each of the flow detectors is memorized; and the number of openings and closings judging mechanism for determining the number of openings and closings counted by the opening and closing times counting mechanism for each of the flow detectors is The above-mentioned suitable opening and closing times memory means memorizes the range of suitable opening and closing times within or outside the range; and the abnormality judging means has a function of judging that the opening and closing times judging means is abnormal when at least any one of the flow detectors is out of range. If the abnormality detection device of the lubrication system of claim 8 is provided, the above-mentioned opening / closing times judging mechanism is provided to determine whether the above-mentioned opening / closing times is smaller than the minimum value of the appropriate number of times of the memory of the appropriate opening / closing times memory mechanism, or whether it is larger than the appropriate number of times The function of the maximum value; and the abnormality judging mechanism has a function of judging each of the flow detectors separately, that is, the opening and closing times judging mechanism judges that the opening and closing times are less than the minimum value, and judges as "small number of abnormalities". When the number of openings and closings is greater than the maximum value, it is judged as "multiple number of abnormalities".