WO2013002199A1 - Conveyor device bearing unit with malfunction detection function, conveyor equipment and bearing unit monitoring system - Google Patents

Abstract

The invention is obtained by setting a rolling bearing (6) inside a housing (8) and is used as a conveyor device bearing unit (10) that is provided in conveying devices such as conveyors (1). The invention is provided with: a power source (12) having a power-generating element (14) that generates electricity using environmental energy and an accumulating means (16) for accumulating the power generated by the power-generating element (14); and a transmitter (13) that wirelessly transmits a signal every time the amount of electricity accumulated by the accumulating means (16) reaches an established value. For the power-generating element (14), a vibrational power-generating element or a thermal power-generating element is used. The invention is used in conveyor rollers (4), plummer blocks, etc. in conveyors (1).

Description

Bearing unit for conveyor with abnormality detection function, conveyor equipment and bearing unit monitoring system Related applications

This application claims the priority of Japanese Patent Application No. 2011-144588 filed on June 29, 2011 and Japanese Patent Application No. 2011-169783 filed on August 3, 2011, which is incorporated herein by reference in its entirety. Cited as what constitutes

The present invention relates to a bearing unit for a conveying device with an abnormality detection function applied to a conveying device such as a belt conveyor (for example, a conveying conveyor in a mining site such as iron ore or coal), and a conveyor facility and a bearing provided with the bearing unit. It relates to a unit monitoring system.

Since a belt conveyor that conveys iron ore, coal, and the like is operated at a relatively long distance from a mining site to a truck loading site, for example, many conveyor bearings are used. As the conveyor bearings, there are bearings built in at both ends of each conveyor roller located in the middle of the conveyor, and plummer block bearings that support the rotation shafts of the conveyor rollers at both ends of the conveyor. It is desirable to replace the bearing used in the above environment at an early stage when a malfunction that makes it impossible to rotate occurs. However, since a large number of bearings are installed over a long distance, it takes a lot of time to inspect maintenance personnel, and in some cases, the entire belt conveyor must be stopped.

As a countermeasure, it has been proposed to provide a temperature switch and an alarm in the bearing used for each conveyor roller to detect an abnormal stop such as a bearing damage and to give an alarm (for example, Patent Document 1). In this patent document, an electromotive force generated by a rotor / stator installed in a conveyor roller is used as means for operating a rotation abnormality alarm device.

Patent No. 3798494

The configuration of Patent Document 1 has a problem that it is difficult to apply because the generator by the rotor / stator is installed in the conveyor roller, the structure is complicated, the design is dedicated, and the degree of freedom is small. Also, as an alarm means for abnormality, lighting of a lamp installed in the vicinity of each conveyor roller and transmission by a buzzer are shown as an example, but in a conveyor with a long conveying distance, a lamp or buzzer in the vicinity of each conveyor roller In some cases, abnormal alarms cannot be confirmed reliably. In addition, if an abnormality detection signal of each conveyor roller is guided to the central control room by wiring and centrally managed, the alarm of the abnormality can be surely confirmed. However, laying the signal wiring along a long route such as a belt conveyor for iron ore and coal from the mining site to the truck loading site supports not only the wiring but also the connection It is also not practical because it requires a means to do this, requires large facilities, and has a problem of disconnection.

Accordingly, the present invention overcomes these problems, has a simple sensor, power supply, and wiring system configuration, facilitates centralized management, and can contribute to accurate abnormality detection of a bearing, and a bearing unit for a conveyor device and a conveyor facility with an abnormality detection function. And providing a bearing unit monitoring system.

A bearing unit for a conveying device with an abnormality detection function according to one configuration of the present invention is a bearing unit for a conveying device that includes a rolling bearing and a housing in which the rolling bearing is installed, and is equipped in the conveying device. A transmitter having a transmission circuit unit for transmitting a signal and a transmission control unit for causing the transmission circuit unit to wirelessly transmit the signal; a power generation element that generates power by environmental energy; and a power storage unit that stores power generated by the power generation element And the power supply for supplying power to the transmitter is provided in the housing, and the transmission control unit causes the transmission circuit unit to transmit a signal each time the amount of power stored by the power storage unit reaches a set value. The transmitter is typically a transmitter that uses radio waves. However, the transmitter is not limited to radio waves, and may be any transmitter as long as wireless transmission is possible, such as using light or another medium.

According to this configuration, the power generated by the power generation element is stored in the power storage means, and transmission is performed by the transmission circuit unit every time the storage amount reaches the set value under the control of the transmission control unit. The power generation element generates power by environmental energy, for example, heat generation or vibration associated with the operation of the bearing. When an abnormality such as poor lubrication or wear occurs in the bearing, the amount of power generation increases and vibration also increases. Therefore, when an abnormality occurs in the bearing, the amount of heat generated by the power generation element increases, the amount of stored electricity reaches the set value quickly, and the transmission interval by the transmission circuit unit is shortened. Therefore, the bearing abnormality can be determined by monitoring the transmission interval from the bearing unit on the receiving side. Also, if an abnormality occurs that causes the bearing to stop, transmission is not performed. Therefore, if a signal is not received even though the transport device equipped with the bearing unit is in a driving state, an abnormality that causes the bearing to stop occurs. It can be determined that it has occurred. As described above, the abnormality detection is performed by using the power generation element serving as the power source for transmission, so that the abnormality detection can be performed with a simple configuration.

Signal transmission is performed using wireless transmission, and the power source for transmission is obtained from a power source having a power generation element in the bearing unit, so that complete abnormality detection, information transmission, and power supply securing can be performed for each bearing unit. This eliminates the need for wiring between the bearing units and the central control room, and simplifies the wiring system. In the case of wired communication, the structure is complicated because the infrastructure such as wiring is laid, and the degree of freedom in design is reduced. However, there is no such inconvenience due to wireless transmission. For this reason, for example, it can be easily applied to a conveyor facility having a long conveying path such as a conveying conveyor such as iron ore or coal. In addition, since the power source uses a power generation element that generates electricity using environmental energy, the configuration is simplified and compact compared to the case of providing a rotor / stator generator that requires components on both the rotating and stationary sides. It becomes. Therefore, it is possible to eliminate the need for a dedicated design, and a great degree of design freedom can be obtained, which makes it easy to apply. Existing bearing units can be easily replaced.

When self-generating power in a bearing unit, the usual idea is to use a generator with a rotor / stator that uses the rotational function of the bearing. However, in the bearing unit, vibration and heat are generated not a little as the rolling bearing rotates. The present invention uses a power generation element that generates power by environmental energy, focusing on the characteristics of such a bearing unit. If the power is enough to be used for signal transmission, there is a possibility of using the power generated by such vibration and heat. Moreover, even if the generated power is small, it can be put into practical use by making a device for detection and transmission.

As the storage means, a capacitor or a secondary battery can be used. If the power storage means is provided, transmission is possible by storing the generated power in the power storage means even when the generated power is small for wireless transmission as it is. In addition, if transmission is always performed, power consumption increases, but for abnormality detection, for example, detection and transmission may be performed every few minutes. Electricity is enough. By taking into consideration such vibration and heat generation characteristics of the bearing unit and the necessity of abnormality detection, the use of the power generation element by environmental energy can be realized.

In this configuration, the transmission control unit may cause the power storage unit to discharge each time the amount of power stored by the power storage unit reaches a set value and causes the transmission circuit unit to perform transmission. The power storage means reduces the amount of power stored when power is used for transmission, but the power consumed for transmission may vary. Stabilize.

In this configuration, the sensor further includes a sensor that detects the status of the rolling bearing, and the transmission control causes the transmission circuit unit to wirelessly transmit information including the status of the rolling bearing detected by the sensor. Provides power to the sensor. Here, “the situation of the rolling bearing” is data indicating one or more characteristics of the rolling bearing, and includes vibration, temperature, rotational speed, and the like of the rolling bearing.

According to this configuration, a sensor that detects the state of the rolling bearing is provided in the bearing unit, and the transmission circuit unit of the transmitter wirelessly transmits information (hereinafter referred to as “sensor information”) including the detected state. By detecting sensor information in a centralized control room or the like, it is possible to easily and accurately detect a large number of bearing abnormalities without much time and effort. The sensor information to be transmitted is not limited to the raw signal of the signal detected by the sensor or simply the amplified signal, but may be information subjected to signal processing such as analog-digital conversion and determination processing. The sensor information may be included in the signal transmitted by the transmission circuit unit.

The power generation element of the bearing unit generates power using environmental energy, but there is a possibility of using the generated power due to such vibration and heat as long as the power is used to transmit sensor information. In addition, since the bearing unit is provided with power storage means, detection by the sensor and transmission of the sensor signal can be performed even when the power generation element such as the stop of the transport device is not generating power.

In this configuration, a thermal power generation element or a vibration power generation element can be used as the power generation element that generates power by the environmental energy. A Seebeck power generation element can be used as the thermoelectric power generation element. An electret element or the like is used as the vibration power generation element. According to these power generation elements, it is possible to generate power using heat and vibration generated in the environment where the bearings of the transfer device are installed. In addition, when an abnormality such as poor lubrication or wear occurs in the bearing, the amount of heat generation and vibration increase, so the bearing abnormality appears as the amount of power generation, and when the amount of stored electricity reaches the set value as described above, Can also be used as an abnormality detection sensor.

In this configuration, the sensor may be at least one of a vibration sensor, a temperature sensor, and a rotation sensor. When an abnormality occurs in a rolling bearing, vibration, temperature rise, rotation effects, etc. occur. Therefore, if at least one of a vibration sensor, a temperature sensor, and a rotation sensor is provided, a bearing abnormality can be detected.

In this configuration, the transmitter may transmit identification information of the bearing unit for the conveying device as the signal to be transmitted. By transmitting the identification information, on the receiving side, it is possible to identify a large number of bearing units provided in the transport device, and identify which transport device the bearing unit is.

In this configuration, storage means for storing information detected by the sensor may be further provided. The storage means may be an IC tag. If the storage means is provided, it is possible to transmit the detected signals collectively to some extent, and it is possible to manage the abnormality with the stored information separately from the management by wireless transmission. If the storage means is an IC tag, the stored information can be easily read by using a tag reader.

In this configuration, a GPS terminal that is a terminal of the global positioning system may be further provided in the housing. If a GPS terminal is provided, the position of the bearing unit is specified. Therefore, even if there is no centralized control panel with a complicated configuration and no means for identifying the bearing unit is provided, the bearing in which an abnormality has occurred. Unit identification is easy. In the case of using the GPS terminal together with the transmission of the identification information, even if the identification information is only information for identifying which bearing unit in the conveying device, which bearing unit of which conveying device is installed in large numbers Can be identified.

In this invention, the conveying device may be a belt conveyor. The belt conveyor may be a belt conveyor provided from a mining site such as iron ore or coal to a truck loading site. Some belt conveyors have a long conveying distance and many bearing units are used. Even in such a case, according to the bearing unit for a conveying device with an abnormality detection function of the present invention, sensors, power supplies, wiring systems The structure is simple, centralized management is easy, and it can contribute to the accurate detection of bearing abnormalities.

When applied to a belt conveyor, the housing is a member provided at an end of a cylindrical body on the outer periphery of a conveyor roller on which the belt of the belt conveyor is hung, and the rolling bearing includes a fixed shaft and the housing The conveyor roller may be supported so as to be rotatable. In this case, the bearing unit for a conveyance device with an abnormality detection function of the present invention can be applied to each conveyor roller provided in a large number on one conveyor.

The conveyor roller is provided with a cover made of synthetic resin that covers the end surface of the cylindrical body, and the transmitter has a radio wave shielding member between the antenna of the transmitter and the cover in a space inside the cover. It is good to arrange in the place which does not intervene. Thus, transmission can be performed from the transmitter antenna built in the conveyor roller without causing a problem of radio wave shielding, and the end of the conveyor roller can be sealed.

When applied to a conveyor roller, the housing may be a plummer block bearing box that supports a rotating shaft of a conveyor roller that is provided with a belt of the belt conveyor. Although the conveyor roller at the end of the conveyor is supported by the plummer block, it is important to detect an abnormality because the load on the bearing is large or the influence upon damage is large. By applying to such a plummer block, accurate abnormality detection can be performed for a bearing having a high necessity for abnormality detection.

A bearing box of the plummer block is composed of a housing main body having an opening facing both end faces and inserting a shaft into one opening, and a lid member closing the other end opening of the housing main body, the transmitter, and The power source may be installed on the lid member. By providing the sensor or the like on the lid member, it is possible to share parts other than the lid member between the bearing unit having an abnormality detection function and the normal bearing unit having no detection function, and the productivity is excellent. An existing bearing unit can be provided with an abnormality detection function simply by replacing the lid member. In addition, when the sensor is provided in the bearing unit, this sensor may also be installed in the said cover member.

The conveyor equipment with an abnormality detection function according to one configuration of the present invention is provided with one or more bearing units for the conveying device with an abnormality detection function of the above configuration on each of a plurality of conveyors. Even in such a conveyor facility having a plurality of conveyors, the configuration of the power supply and wiring system is simple, centralized management is easy to perform, and it is possible to contribute to accurate abnormality detection of the bearing.

In this case, a centralized control panel that collectively monitors each piece of information transmitted by the transmitter of each bearing unit of the one or more conveying device bearing units with an abnormality detection function provided on each of the plurality of conveyors; A relay device that receives, amplifies, and wirelessly transmits information transmitted by the transmitter may be provided between a plurality of conveyors. Even when the distance between the conveyor and the central control panel such as the central control room is long, wireless communication is possible by using the relay device.

A bearing unit monitoring system according to one configuration of the present invention includes a conveying device bearing unit with an abnormality detection function configured as described above, a receiver that receives the signal transmitted by the transmission circuit unit, and a monitoring device that includes an abnormality determination unit. The abnormality determination means determines an abnormality from a change in the interval of signals transmitted from the transmitter and received by the receiver. According to this bearing unit monitoring system, the above-described operations and effects described for the bearing unit for a conveying device with an abnormality detection function having the above-described configuration can be obtained, and a bearing abnormality can be determined from a change in signal interval. It should be noted that the change in the interval mentioned here includes a case where the signal is not received. When the bearing is stopped, power generation is not performed. However, since no signal is received, it can be determined that an abnormality has occurred to the extent that the bearing stops.

In this bearing unit monitoring system, the abnormality determination means always includes a signal interval in a reference period or a reference transmission count that is set in advance in the past, and a current target period or target transmission count. The abnormality determination may be performed by comparing the signal interval. For example, the moving average of the comparison reference period and the moving average of the target period are compared. In many cases, the occurrence of heat generation and vibration differs depending on whether the bearing has been used for many years or if it is nearly new. In the case of long-term use, even if there is a large amount of heat generation or vibration, it may not be abnormal. For this reason, an accurate abnormality determination cannot be performed simply by comparing the transmission interval with the set interval. On the other hand, as in the above configuration, the signal interval in the reference period or the reference transmission count that is always determined before the present in the past, and the signal interval of the currently determined target period or the target transmission count, By performing the abnormality determination by comparing the two, it is possible to perform the abnormality determination with high reliability. This is because if the amount of heat generation or vibration suddenly increases during use of the bearing as compared to a certain period in the past, the bearing is often abnormal.

Any combination of at least two configurations disclosed in the claims and / or the specification and / or drawings is included in the present invention. In particular, any combination of two or more of each claim in the claims is included in the present invention.

The present invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are for illustration and description only and should not be used to define the scope of the present invention. The scope of the invention is defined by the appended claims. In the accompanying drawings, the same reference numerals in a plurality of drawings indicate the same or corresponding parts.
It is a longitudinal cross-sectional view of the conveyor roller provided with the bearing unit for conveyance apparatuses with an abnormality detection function which concerns on 1st Embodiment of this invention. It is a partial expanded sectional view of the conveyor roller. It is a notch perspective view of the plummer block which is a bearing unit for conveyance devices with an anomaly detection function concerning a 2nd embodiment of this invention. It is a front view of the plummer block. It is a notch perspective view of the plummer block which is a bearing unit for conveyance devices with an anomaly detection function concerning a 3rd embodiment of this invention. FIG. 5 is a block diagram showing an example of the configuration of a sensor, a power supply, a transmitter, and the like in the bearing unit for a conveyance device with an abnormality detection function according to the first to third embodiments of the present invention. It is a block diagram which shows the modification of a structure of the sensor, a power supply, a transmitter, etc. It is a graph which shows the repetition condition of the electrical storage and discharge by the electric power generation element of the electrical storage means of the power supply in the bearing unit of FIG. (A), (B) is a characteristic view showing the change of the repetition cycle of the discharge of the power storage means of the power source of the bearing unit of FIG. 6 when normal and abnormal, respectively. It is a block diagram which shows the bearing unit monitoring system concerning 4th Embodiment of this invention. It is a block diagram which shows the modification of the bearing unit of the bearing unit monitoring system of FIG. FIG. 3 is a front view of a conveyor to which the bearing unit for a conveyance device with an abnormality detection function according to any one of the first to third embodiments of the present invention is applied. It is a figure which shows typically the installation which installed the multiple conveyor of FIG.

Embodiments of the present invention will be described with reference to the drawings. FIG. 12 is a front view of the conveyor 1 which is a transport apparatus equipped with the bearing unit for a transport apparatus with an abnormality detection function. The conveyor 1 is a belt conveyor, and an endless conveyor belt 2 is hung between the conveyor rollers 3 and 3 at both ends, and a plurality of conveyor rollers 4 arranged in the transport direction (direction A) are arranged in the middle portion of the conveyor belt 2. The lower surface is supported. In addition, a conveyor roller 4A for applying tension is provided. The conveyor belt 2 is rotationally driven by rotating one of the conveyor rollers 3 at both ends by a motor (not shown). 1 and 2 show the bearing units in the intermediate conveyor roller 4, and FIGS. 3 to 5 show the bearing units in the plummer block that supports the conveyor rollers 3 at both ends.

FIG. 1 shows a bearing unit according to a first embodiment of the present invention, which is mounted on the conveyor 1. This bearing unit is applied to a conveyor roller 4 located in the middle of the conveyor 1 (located at both ends). The conveyor roller 4 includes a cylindrical body 7 that is rotatably attached to a fixed shaft 5 via a bearing 6. Both ends of the fixed shaft 5 are fixed to the conveyor frame 1a. The cylindrical body 7 is provided with a stepped cylindrical housing 8 serving as a side plate at both ends, and a bearing 6 is fitted in a small diameter cylindrical portion 8 a of the housing 8. As shown in FIG. 2, the housing 8 is fitted to the inner periphery of the cylindrical body 7 with a large-diameter cylindrical portion 8 b. The bearing 6 is a rolling bearing such as a deep groove ball bearing, and an inner ring thereof is fitted to the outer periphery of the fixed shaft 5. The bearing 6 and the housing 8 constitute a bearing unit 10. This bearing unit 10 constitutes a bearing unit for a conveyance device with an abnormality detection function according to the first embodiment together with a sensor, a power source, a transmitter and the like which will be described later.

A cover 9 and a labyrinth seal 29 are attached to the outside of the bearing 6 in the housing 8 to prevent rainwater and dust from entering the bearing 6 and the cylindrical body 7. The labyrinth seal 29 includes a fixed side seal member 29 a provided on the fixed shaft 5 and a rotation side seal member 29 b attached to the housing 8.

In the housing 8 at both ends of the conveyor roller 4, a sensor 11, a power supply 12, and a transmitter 13 are disposed between the bearing 6 and the cover 9. The sensor 11, the power source 12, and the transmitter 13 are fixed to the outer periphery of the fixed shaft 5 on the fixed side. The sensor 11, the power source 12, and the transmitter 13 may be provided on a part of the outer periphery of the fixed shaft 5, or may be provided over the entire periphery. The cover 9 is made of a synthetic resin, and the transmitter 13 is arranged at a location where the antenna is not interposed between the cover 9 and the radio wave shielding member such as metal in the space inside the cover 9. 1 and 2, the rotation side seal member 29b of the labyrinth seal 29 is interposed between the cover 9 and the transmitter 13, and the interposed portion or the whole of the rotation side seal member 29b does not have a radio wave shielding property. It is made of synthetic resin.

The sensor 11 is a sensor that detects the state of the bearing 6 and is preferably disposed in contact with the bearing 6, but may not necessarily be in contact. Here, the “situation of the bearing” is data indicating one or more characteristics of the rolling bearing. The sensor 11 is, for example, any one of a vibration sensor, a temperature sensor, and a rotation sensor. As the sensor 11, any two of these vibration sensors, temperature sensors, and rotation sensors may be provided, or all three types may be provided. An acceleration sensor or the like can be used as the vibration sensor, and a thermistor or the like can be used as the temperature sensor. The rotation sensor detects a relative rotation speed between the inner and outer rings of the bearing 6 or a relative rotation speed between the cylindrical body 7 of the conveyor roller 4 and the fixed shaft 5. For example, a magnetic sensor provided on the outer periphery of the fixed shaft 5. An optical or optical annular encoder (not shown) and a magnetic or optical sensor element for detecting the encoder are fixed to the housing 8. Thus, the “bearing status” is one or a combination of vibration, temperature, and rotational speed of the rolling bearing, depending on the type of the sensor 11.

The sensor 11 may be composed of a sensor element or may have a sensor element and a signal processing circuit (not shown) that processes an output signal of the sensor element. The signal processing circuit may be an amplifier, or may further have an analog / digital conversion means, a filter, or the like.

The power source 12 is for driving the sensor 11 and the transmitter 13, and includes a power generation element 14, a rectification / charging circuit 15, and a power storage means 16, as shown in a block diagram in FIG. As the power generation element 14, a vibration power generation element or a thermoelectric power generation element that generates power using environmental energy in the environment of the element can be used. As the vibration power generation element, a semiconductor element such as an electret element is used. A Seebeck power generation element can be used as the thermoelectric power generation element. In the case of a thermoelectric generator, the necessary electric power can be generated by disposing the high temperature side of the element inside and disposing the low temperature side on the outside air (atmosphere) side. Furthermore, if the contact area with the atmospheric air on the outside air side is increased and the comb shape (fins) is formed so as to promote heat dissipation, the temperature difference is further increased and the power generation amount can be increased.

The power storage means 16 is a storage battery such as a capacitor or a lithium secondary battery. The rectification / charging circuit 15 is a circuit that rectifies the current generated by the power generation element 14 and charges the power storage means 16. Note that the power source 12 may include only the power generation element 14 without the power storage unit 16.

The transmitter 13 includes a transmission antenna 17, a transmission circuit unit 18, and a transmission control unit 19. The transmission circuit unit 18 is a circuit that modulates a signal in a predetermined modulation format and transmits the signal as a radio wave from the antenna 17. The transmission control unit 19 causes the transmission circuit unit 18 to transmit a signal according to a predetermined condition, and includes a circuit, a microcomputer, and the like that transmit this signal. The signal may include arbitrary information. For example, the signal may include information output from the sensor 11, that is, information including the status of the bearing 6 (FIG. 1). In this example, transmission is performed using radio waves. However, transmission may be performed using radio waves other than radio waves as long as transmission is performed wirelessly.

The transmission control unit 19 is, for example, a unit that determines whether or not the amount of charge (for example, stored electric charge) of the power storage unit 16 reaches a set value, and transmits when the set value is reached. The transmission control unit 19 includes, for example, an electronic circuit such as a switching circuit that opens and closes the connection of the power storage unit 16 with respect to the transmission circuit unit 18. Details of transmission control by the transmission control unit 19 will be described later with reference to FIGS. 8 and 9A and 9B. The determination of the charge amount of the power storage unit 16 is performed based on the terminal voltage of the power storage unit 16, for example. In this case, although the transmission interval depends on the generated power of the power generation element 14 of the power supply 12, for example, when the power generation element 14 can generate power of about 100 μW, transmission can be performed every 5 minutes. The transmission control unit 19 may perform transmission after the transmission reaches the set value, and then cause the power storage unit 16 to discharge until the amount of power stored becomes zero or less than the set value for stopping discharge. The power storage unit 16 reduces the amount of power stored when power is used for transmission, but the transmission interval is stabilized by further discharging. That is, the power consumed for transmission is not necessarily constant, but the time required for power storage becomes constant by further discharging.

The transmission control unit 19 transmits the identification information of the bearing unit 10 (FIG. 1) where the sensor 11 is installed together with the information output from the sensor 11. This identification information may be stored in the transmission control unit 19 or may be stored in a storage means provided separately from the transmission control unit 19.

As a part of the transmitter 13 or the sensor 11, or independently of the transmitter 13 and the sensor 11, storage means 20 for storing information detected by the sensor 11 (information consisting of the status of the bearing 6 (FIG. 1)) is stored. The bearing unit 10 may be provided. The storage means 20 may be a storage circuit element provided on a circuit board (not shown) of the transmitter 13 or the sensor 11 or an IC tag. When the storage unit 20 is included, the transmitter 13 may transmit the information stored in the storage unit 20. When the storage means 20 is an IC tag, the maintenance staff can use the IC tag reader to check the usage status / state of the bearing unit 10 on the spot when performing an on-site inspection. In addition to this management, more reliable maintenance management becomes possible.

Further, the GPS terminal 21 may be provided in the housing 8 (FIG. 1). The GPS terminal 21 is a global positioning system (GPS) terminal and outputs a signal for informing the position. The GPS terminal 21 may receive position information corresponding to the transmission signal from the global positioning system and transmit the received position information together with detection information of the sensor 11. The identification information transmitted by the transmitter 13 may be information for identifying only which part of the bearing unit 10 in one conveyor 1, and even in that case, by combining with the position information of the GPS terminal 21. The details of which bearing unit 10 of which conveyor 1 is can be specified.

In the above example, the sensor 11, the power source 12, and the transmitter 13 are individually installed in the bearing unit 10. However, as shown in FIG. 7, for example, the sensor 11, the power source 12, and the transmitter 13 are combined together. The sensor module 22 with a transmission power generation function, which is a component, may be installed in the bearing unit 10. As such a sensor module 22 with a transmission power generation function, for example, a module having a size of about 25 mm square has been commercialized, and it can be used.

Regarding the method of determining the abnormality of the rolling bearing 6 without being based on the information detected by the sensor 11, that is, determining the abnormality from the change in the interval of signals transmitted from the transmitter 13 and received by the receiver (not shown). A method for performing the above will be described with reference to FIGS. 8, 9 </ b> A, and 9 </ b> B.

The power generated by the power generation element 14 in FIG. 6 is stored in the power storage means 16, and transmission is performed by the transmission circuit unit 18 every time the storage amount reaches a set value under the control of the transmission control unit 19. The determination of the charge amount of the power storage unit 16 is performed based on, for example, the terminal voltage of the power storage unit 16. FIG. 8 shows this state, the vertical axis is the terminal voltage V of the power storage means 16, and the horizontal axis is time t. Hereinafter, the case where the power generation element 14 is a thermoelectric power generation element such as a Seebeck power generation element will be described.

Since the bearing 6 (FIG. 1) generates heat during operation, power generation is performed by the power generation element 14 of FIG. 6 due to a temperature difference from the ambient atmosphere such as the atmosphere. The generated power is charged in the power storage means 16. As shown in FIG. 8, the power storage means 16 has a terminal voltage V that increases as the amount of charge increases. When the amount of charge increases to a set value, that is, when the terminal voltage V increases to a set value VA, the transmission control unit 19 in FIG. Signals are transmitted by the transmission circuit unit 18 under the control of the switching operation and the like. By this signal transmission, the stored power of the power storage means 16 is consumed, and the terminal voltage V decreases. At this time, after the signal transmission, the transmission control unit 19 changes the terminal voltage V to the discharge stop setting voltage VB until the amount of power stored in the power storage means 16 becomes equal to or lower than the discharge stop set value, that is, as shown in FIG. You may make it discharge until it falls. Thereafter, the amount of power storage is increased again by power generation by the power generation element 14 (FIG. 6), the terminal voltage V rises, and transmission and discharge are performed when the terminal voltage V rises to the set value VA. Such an operation is repeated.

When the temperature of the bearing 6 (FIG. 1) is constant, the amount of power generated by the power generation element 14 of FIG. 6 is also constant, so the transmission cycle T is constant. However, if the temperature rises due to an abnormality in the bearing 6 (FIG. 1) or the like, the transmission cycle T is shortened. As a specific example, if the power generation state of the power generation element 14 when the bearing temperature is 40 ° C. is 1 V / h (that is, 1 V increase per hour) at the terminal voltage V, the bearing temperature is about 50 ° C. Then, the power generation state of the power generation element 14 becomes 1.5 V / h (that is, 1.5 V increase per hour) at the terminal voltage V. Therefore, the transmission frequency is 1.5 times (transmission cycle is 2/3).

A monitoring device (not shown) arranged away from the conveyor 1 (FIG. 1) receives and monitors the signal transmitted in this way, and the transmission frequency is constant as shown in FIG. 9A, for example. When the transmission frequency is high (transmission cycle T is short) as in the section tc of FIG. 9B, it is determined that a bearing abnormality has occurred, and the determination result is Output.

Further, when the bearing 6 (FIG. 1) stops due to an abnormality, no signal transmission is performed. Therefore, even if the drive source of the conveyor 1 is driven, a transmission signal is not received within the set time. Is determined to be abnormal to the extent that the bearing 6 (FIG. 1) stops.

In this abnormality determination process, what is determined as abnormal when the transmission frequency is determined may be appropriately set based on experience, simulation, or the like. In addition to determining the presence or absence of abnormality by simply comparing the transmission frequency or transmission cycle with a set value, the presence or absence of abnormality may be determined by performing statistical processing. For example, in the abnormality determination process, the signal interval in the reference period or the number of reference transmissions in the past, which is just before the present, is always compared with the signal interval in the currently determined target period or the number of target transmissions. Thus, the abnormality determination may be performed.

In the specific example of FIG. 9B, assuming that the current time is t1, the reference transmission frequency (3 times) before the current time t1 is determined (for example, 3 times) before the current time t1 (FIG. 9). In (B), the average signal interval in the interval ta) is compared with the average signal interval in the current number of target transmissions (for example, three times of signals) of the current (t1) (interval tb in FIG. 9B). If the difference is greater than or equal to the set value, it is determined that there is an abnormality. In other words, the moving averages are compared.

Bearings often generate different heat and vibration when used for many years and when they are almost new. In the case of long-term use, even if there is a large amount of heat generation or vibration, it may not be abnormal. For this reason, an accurate abnormality determination cannot be performed simply by comparing the transmission interval with the set interval. On the other hand, as in the above configuration, the signal interval in the reference period or the reference transmission count that is always determined before the present in the past, and the signal interval of the currently determined target period or the target transmission count, By performing the abnormality determination by comparing the two, it is possible to perform the abnormality determination with high reliability. This is because if the amount of heat generation or vibration suddenly increases during use of the bearing as compared to a certain period in the past, the bearing is often abnormal.

Thus, by monitoring the signal transmission interval from the bearing unit 10, it is possible to determine the abnormality of the bearing 6 (FIG. 1). In addition, when an abnormality occurs in which the bearing 6 (FIG. 1) stops, transmission is not performed. Therefore, when the conveyor 1 equipped with the bearing unit 10 is in a driving state and no signal is received, It can be determined that an abnormality that stops the bearing 6 (FIG. 1) has occurred. As described above, since the abnormality of the bearing can be detected by using the power generation element 14, the abnormality can be detected even if the sensor 11 is not provided. And when a malfunction occurs, the bearing 6 (FIG. 1) can be replaced at an early stage before the rotation becomes impossible.

As described above, since the abnormality of the bearing is determined based on the signal transmission interval, the signal transmitted by the transmission circuit unit 18 of the transmitter 13 does not need to include any information. However, this signal may include arbitrary information, and may include information including a bearing state detected by the sensor 11. In that case, an abnormality can be detected from the transmission interval of the signal transmitted by the transmission circuit unit 18 of the transmitter 13, and the abnormality can also be detected from the sensor information included in this signal. Therefore, more reliable abnormality detection is possible. However, the information including the status of the bearing may be transmitted by being included in a signal different from the signal whose transmission interval is monitored.

FIG. 3 and FIG. 4 show a bearing unit according to the second embodiment of the present invention, which is mounted on the conveyor 1. This bearing unit is composed of plummer blocks 10P located at both ends of the conveyor 1, respectively. This plummer block 10P supports the rotating shaft 31 which the conveyor roller 3 of the both ends in the conveyor 1 of FIG. 12 has, and the bearing 36 which supports the rotating shaft 31 is provided in the housing 32 which is a plummer block bearing box. Configured. The bearing 36 is a rolling bearing such as a double row spherical roller bearing. The housing 32 includes a housing body 32a and a lid member 32b. The housing main body 32a is provided with a bearing 36 therein, has an opening facing both end faces, and allows the rotary shaft 31 to be inserted into the opening at one end. The lid member 32b is a member that closes the opening at the other end.

In the second embodiment, the sensor 11, the power source 12, and the transmitter 13 are embedded in the upper surface portion of the housing body 32a of the housing 32. For example, a recess is provided on the surface of the housing 32, and the sensor 11, the power source 12, and the transmitter 13 are disposed therein. The sensor 11, the power source 12, and the transmitter 13 can be configured as described above with reference to the first embodiment shown in FIGS. 1 and 2, but the transmitter 17 has the antenna 17 (FIG. 6) exposed to the atmosphere. Provide as follows. As shown in FIG. 7, the sensor 11, the power source 12, and the transmitter 13 may be integrated as a sensor module 22 with a transmission power generation function. Also in the second embodiment, the storage means 20 and the GPS terminal 21 may be installed in the housing 32 as in the bearing unit according to the first embodiment.

In the bearing unit (plummer block 10P) according to the second embodiment shown in FIGS. 3 and 4, the sensor 11 and the like are provided in the housing body 32a. However, the bearing unit (plummer block 10P) according to the third embodiment shown in FIG. As described above, the sensor 11, the power supply 12, and the transmitter 13 may be embedded in the lid member 32 b of the housing 32. Also in this case, the transmitter 13 is provided so that the antenna 17 (FIG. 6) is exposed to the atmosphere.

Configurations of the sensor 11, the power supply 12, and the transmitter 13 in the bearing unit (plummer block 10P) according to the second embodiment of FIGS. 3 and 4 and the bearing unit (plummer block 10P) according to the third embodiment of FIG. This is the same as the bearing unit 10 according to the first embodiment described above with reference to FIGS. Also in the bearing unit (plummer block 10P) according to the second and third embodiments of FIGS. 3 to 5, the storage means 20 and the GPS terminal 21 may be provided in the same manner as described above.

FIG. 13 shows a conveyor facility 100 with an abnormality detection function in which a plurality of conveyors 1 equipped with the conveyor 1 of FIG. 12, that is, the bearing unit 10 for a conveyance device with an abnormality detection function, are installed. This conveyor facility 100 is for conveying, for example, iron ore or coal, and a conveyor row in which the conveyors 1 are arranged in a vertical row is provided from the mining site to the track loading site.

In this example, a central management room 42 having a central management panel 41 and a relay device 43 are installed. The central control board 41 has an antenna 44 and a receiver (not shown), and a display device (not shown) with a pictorial diagram or a table showing each conveyor 1 and each bearing unit 10 for a conveyance device with an abnormality detection function thereof. And it has a function which displays the abnormality occurrence information of each bearing unit 10 on the pictorial chart or table. The picture or table showing the bearing unit 10 may be displayed as an image on the screen of one display device.

The central management board 41 has an abnormality determining means 45 for determining an abnormality for each of the bearings 6 (FIG. 1) and 36 (FIG. 3), and displays the abnormality determination result on the display device (not shown). The abnormality determination unit 45 determines that an abnormality has occurred when a signal is not received for a set time or more, even though the conveyor 1 equipped with the bearing unit 10 is in a driving state. Furthermore, abnormality determination may be performed based on information in the received signal (sensor detection information, that is, information including the status of the bearing). In addition, the abnormality determination unit 45 may perform abnormality determination based on both the received signal information and the signal reception interval. When the power generation element 14 is a thermoelectric generation element or a vibration power generation element, as the abnormality of the bearings 6 (FIG. 1) and 36 (FIG. 3) progresses, the temperature increases and the vibration increases, so the power generation amount increases. This is because the transmission interval is shortened, so that a sign of bearing abnormality appears due to this transmission interval.

The relay device 43 is installed between each conveyor 1 and the centralized management board 41, and receives a signal transmitted from each transmitter 13 of the bearing unit 10 (or 10P) provided in each conveyor 1 or more. A device that amplifies and wirelessly transmits.

In the bearing units according to the first to third embodiments, the sensor 11 for detecting the status of the bearings 6 (FIG. 1) and 36 (FIG. 3) and information including the detected status (hereinafter referred to as “sensor information”). Since the bearing unit 10 (or 10P) is provided with the transmitter 13 that wirelessly transmits the bearing 6 (or 10P), in addition to monitoring the signal transmission interval, the sensor information is monitored in the centralized control room 42 or the like, whereby the bearing 6 (FIG. Abnormalities 1) and 36 (FIG. 3) can be easily and accurately detected without much time and effort. For this reason, when a problem that makes rotation impossible occurs, the bearings 6 (FIG. 1) and 36 (FIG. 3) can be replaced at an early stage before rotation becomes impossible.

Since radio transmission is used for signal transmission, and power for transmission is obtained from the power source 12 (FIG. 6) having the power generation element 14 (FIG. 6) in the bearing unit 10, each bearing unit 10 Completed abnormality detection, information transmission, and securing of power supply can be performed, wiring between the bearing units 10 and the central control room 42 is unnecessary, and the wiring system is simplified. In the case of wired, the structure becomes complicated due to the installation of infrastructure such as wiring, and the degree of freedom in design is reduced, whereas in wireless, such a problem is eliminated. In addition, when the distance of the conveyor 1 is long, the relay device 43 is installed along the conveyor 1 for each transmission possible range, so that transmission to the centralized management room 42 can be performed wirelessly. For this reason, for example, it can be easily applied to a conveyor facility having a long conveying path such as a conveying conveyor such as iron ore or coal.

When the sensor information is transmitted from the bearing unit 10 (or 10P), the antenna 17 becomes incapable of communication if it is covered with metal, but the belt conveyor 1 used outdoors has the first to third implementations of FIGS. As shown in the bearing unit according to the embodiment, a good communication state can be obtained by arranging the surface of the antenna 17 so as to be exposed to the atmosphere.

In addition, since the power supply 12 in FIG. 6 is supplied by “self-power generation” to operate the equipment, it can be made stand-alone. In other words, since the power generation element 14 that generates power using environmental energy is used, the configuration is simplified and compact compared to the case of providing a rotor / stator generator that requires components on both the rotating side and the stationary side. Is done. Therefore, it is possible to eliminate the need for a dedicated design, and a great degree of design freedom can be obtained, which makes it easy to apply. Existing bearing units can be easily replaced.

As the environmental power generation element 14 that performs “self-power generation”, for example, a vibration power generation element that can generate power of about 100 μW has been commercialized, and when this is used, the generated power can be transmitted every 5 minutes. Further, if the power storage means 16 such as a lithium secondary battery is charged in advance, information can be transmitted by the power storage means 16 even when power is not generated when the conveyor is stopped.

When self-power generation is performed in the bearing unit 10 (FIG. 1) (or 10P (FIG. 3)), a generator using a rotor / stator that utilizes the rotational function of the bearing is conventionally used. However, in the bearing unit 10, vibration and heat are generated not a little as the bearing 6 rotates. Focusing on such characteristics of the bearing unit and using the power generation element 14 that generates power by environmental energy, which has not been considered in the conventional bearing unit, it is possible to achieve compactness and simplification of the configuration.

If the power is enough to transmit signals and drive the sensor, there is a possibility of using the generated power by such vibration and heat. Even if the generated power is small, it is possible to put it into practical use by providing the power storage means 16 as described above and making a device for detection and transmission such as transmission when the charge amount is sufficient. .

As the power generation element 14, in addition to the vibration power generation element (electret element) as described above, a thermoelectric generation element (Seebeck element) using heat generated by the rotation of the bearing 6 can be used. In this case, necessary power can be generated by disposing the high temperature side of the element inside and disposing the low temperature side on the outside air (atmosphere) side. Furthermore, if the comb-shaped (fin) shape is used to increase the contact area with the atmosphere on the outside air side and promote heat dissipation, the power generation amount can be further increased due to a temperature difference.

As described above, a temperature sensor can be used as the abnormality detection sensor 11 in addition to the vibration sensor. Moreover, it can be said that it is an effective sensing method in that if a rotation sensor is used, the occurrence of a malfunction can be predicted by capturing the phenomenon that the rotation speed decreases.

When the identification information is transmitted from the transmitter 13 of each bearing unit 10 together with the sensor information, it is possible to identify which bearings 6 and 36 information is used. In the case of the provided equipment, it is possible to specify the details of which bearing 6 (FIG. 1) and 36 (FIG. 3) of which conveyor 1 by interlocking with the GPS terminal 21.

The bearing unit for a conveyance device with an abnormality detection function according to the first to third embodiments of the present invention does not necessarily include the sensor 11 (FIG. 1). When the sensor 11 is omitted in the conveyance device bearing unit with an abnormality detection function according to the first embodiment shown in FIGS. 1 to 6, there is a sensor 11 interposed between the bearing 6 and the power supply 12 in FIG. Instead, a spacer 11 is interposed instead of the sensor 11. The power source 12 may be disposed in contact with the bearing 6 without providing the spacer 11. Moreover, in the bearing unit for a conveyance device with an abnormality detection function in which the sensor 11 is omitted, the power source 12 in FIG. 6 serves as a driving power source for the transmitter 13, but as a sensor for detecting an abnormality in the bearing 6 in FIG. Combine functions. That is, since the signal transmission interval corresponding to the power generation time of the power source 12 is monitored and an abnormality is detected, the power source 12 functions as a sensor for detecting an abnormality.

Next, a bearing unit monitoring system 50 according to a fourth embodiment of the present invention will be described with reference to FIG. The bearing unit monitoring system 50 includes the bearing unit 10 (or 10P) according to any one of the first to third embodiments. In the description of the present embodiment, the same or corresponding parts as those described with respect to the first to third embodiments of the bearing unit of the present invention are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 10, the bearing unit monitoring system 50 according to the first embodiment includes one or more bearing units 10 (or 10P) and a centralized control panel 41 including a monitoring device 46. The bearing unit 10 (or 10P) is a bearing unit according to any one of the first to third embodiments. However, this bearing unit 10 (or 10P) is not provided with the sensor 11 (FIG. 6). Moreover, these bearing units 10 (or 10P) are equipped in the conveyor 1 as demonstrated regarding FIG.

The bearing unit 10 (or 10P) may be provided with a GSP terminal 21 attached to the transmitter 13 as shown in FIG.

10, a monitoring device 46 is a device that is provided on the central management board 41 of the central management room and monitors a signal transmitted from the transmitter 13 of the bearing unit 10. The monitoring unit 46 and the bearing unit 10 (or 10P) for the conveying device with an abnormality detection function constitute a bearing unit monitoring system 50. The monitoring device 46 includes a receiver 47 that receives a transmission signal of the transmitter 13 of the bearing unit 10 (or 10P), an abnormality determination unit 45A, and a bearing unit specifying unit 49. The receiver 47 includes an antenna 52 and a receiving circuit unit 51. The bearing unit specifying means 49 is means for specifying which bearing unit 10 the signal is from the signal received by the receiver 47, and is specified by the identification information in the transmission information. When the GPS terminal 21 (FIG. 11) is provided in the bearing unit 10, the bearing unit specifying means 49 uses the position signal from the GPS terminal 21 (FIG. 11) or the position of the GPS terminal 21 (FIG. 11). The bearing unit 10 (or 10P) is specified using both the signal and the identification information.

The abnormality determination unit 45A determines an abnormality from a change in the interval of signals transmitted from the transmitter 13 and received by the receiver 47. The specific determination process of the abnormality determination unit 45A is as described with reference to FIGS. 8, 9A, and 9B for the bearing unit for a transport device according to the first embodiment.

Therefore, the abnormality determination means 45A of the monitoring device 46 monitors the signal transmitted from the transmitter 13 of the bearing unit 10 and is normal if the transmission frequency is constant as shown in FIG. 9A. When the transmission frequency is high (transmission cycle T is short) as in the section tc shown in FIG. 9B, it is determined that a bearing abnormality has occurred, and the determination result is output.

In the fourth embodiment, the configuration in which the sensor is not provided in the bearing unit has been described, but a sensor may be provided. In this case, the abnormality of the bearing is detected not only based on the time interval of the transmission signal but also based on the sensor information as in the first to third embodiments. Thereby, the abnormality of a bearing is detected more reliably.

In addition, although each said embodiment demonstrated the case where the conveying apparatus was the belt conveyor 1, this invention is applicable also to conveyors other than a belt type, and also conveying apparatuses other than a conveyor.

Hereinafter, modes 1 to 12, which are components of the present invention and do not require a configuration that causes the transmission circuit unit to transmit each time the amount of power stored by the power storage unit reaches a set value, will be described.
[Aspect 1]
A bearing unit for a conveyance device with an abnormality detection function according to aspect 1 includes a rolling bearing and a housing in which the rolling bearing is installed, and is a bearing unit for a conveyance device equipped in the conveyance device, the rolling unit A sensor that detects a state of the bearing, a transmitter having a transmission circuit unit that wirelessly transmits information including the state of the rolling bearing detected by the sensor, and a power generation element that generates power using environmental energy. And a power supply for supplying power to the machine.

[Aspect 2]
In aspect 1, the power source may include power storage means for storing the power generated by the power generation element. The transmission means may perform wireless transmission of information detected by the sensor each time the amount of power stored in the power storage means reaches a set value. As the power storage means, a capacitor or a secondary battery can be used.

[Aspect 3]
In aspect 1, a vibration power generation element or a thermoelectric power generation element can be used as the power generation element that generates electric power using the environmental energy. An electret element or the like is used as the vibration power generation element. A Seebeck power generation element can be used as the thermoelectric power generation element. According to these power generation elements, it is possible to generate power using vibration and heat generated in the environment where the bearings of the transfer device are installed.

[Aspect 4]
In aspect 1, it is preferable to provide at least one of a vibration sensor, a temperature sensor, and a rotation sensor as the sensor. When an abnormality occurs in a rolling bearing, vibration, temperature rise, rotation effects, etc. occur. Therefore, if at least one of a vibration sensor, a temperature sensor, and a rotation sensor is provided, a bearing abnormality can be detected.

[Aspect 5]
In the first aspect, a storage unit that stores information detected by the sensor may be provided. The storage means may be an IC tag.

[Aspect 6]
A GPS terminal that is a terminal of the global positioning system may be provided in the housing.

[Aspect 7]
In the first aspect, the conveyance device with an abnormality detection function may be a belt conveyor.

[Aspect 8]
In aspect 7, the housing is a member provided at an end of a cylindrical body on the outer periphery of a conveyor roller around which a belt of the belt conveyor is hung, and the rolling bearing is provided between a fixed shaft and the housing. It may be interposed so as to rotatably support the conveyor roller.

[Aspect 9]
In aspect 8, the conveyor roller is provided with a synthetic resin cover that covers an end surface of the cylindrical body, and the transmitter shields radio waves between the antenna of the transmitter and the cover in a space inside the cover. It is good to arrange | position in the location which does not interpose a property member.

[Aspect 10]
In the aspect 7, the housing may be a plumer block bearing box that supports a rotation shaft of a conveyor roller on which the belt of the belt conveyor is hung.

[Aspect 11]
In a tenth aspect, the bearing box of the plummer block includes a housing body having an opening facing both end faces and a shaft inserted into the opening at one end, and a lid member closing the opening at the other end of the housing body, A sensor, a transmitter, and a power source may be installed on the lid member.

[Aspect 12]
The conveyor equipment with an abnormality detection function according to the aspect 12 is provided with a plurality of conveyors equipped with the bearing unit for an abnormality detection function with the abnormality detection function according to any one of the above aspects 1 to 11.
In this case, the information transmitted by the transmitter is received, amplified, and wirelessly transmitted between the centralized control panel that collectively monitors the information transmitted by the transmitters mounted on the conveyors and the conveyor. A relay device may be provided.

In the above-described modes 1 to 12, since the bearing abnormality is not detected by the transmission interval of the transmitter, the power storage means may be charged by means other than the power generation element. Thereby, for example, the power storage means is charged in advance, and even when power is not generated when the conveyor 1 is stopped, it is possible to transmit information such as sensor information with stored power.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily assume various changes and modifications within the obvious scope by looking at the present specification. Accordingly, such changes and modifications are to be construed as within the scope of the invention as defined by the appended claims.

1 ... Conveyor (conveying device)
6, 36 ... Bearings 8, 32 ... Housing 10, 10P ... Bearing unit 10P ... Plummer block 11 ... Sensor 12 ... Power source 13 ... Transmitter 14 ... Power generation element 16 ... Power storage means 18 ... Transmission circuit unit 19 ... Transmission control unit

Claims (18)

1. A roller bearing and a bearing unit for a conveying device provided in the conveying device, including a rolling bearing and a housing in which the rolling bearing is installed.
   A transmitter having a transmission circuit unit that transmits a signal and a transmission control unit that causes the transmission circuit unit to wirelessly transmit the signal;
   The housing includes a power generation element that generates power using environmental energy and power storage means that stores power generated by the power generation element, and the housing includes a power source that supplies power to the transmitter.
   The said transmission control part is a bearing unit for conveyance apparatuses with an abnormality detection function which makes the said transmission circuit part transmit a signal whenever the electrical storage amount by the said electrical storage means reaches a setting value.
2. 2. The transport device with an abnormality detection function according to claim 1, wherein the transmission control unit discharges the power storage unit each time the amount of power stored by the power storage unit reaches a set value and causes the transmission circuit unit to perform transmission. Bearing unit.
3. The claim 1, further comprising:
   A sensor for detecting the condition of the rolling bearing;
   The transmission control unit causes the transmission circuit unit to wirelessly transmit information including the status of the rolling bearing detected by the sensor,
   The power supply is a bearing unit for a conveyance device with an abnormality detection function that supplies power to the sensor.
4. 2. The bearing unit for a conveyance device with an abnormality detection function according to claim 1, wherein the power generation element is a vibration power generation element.
5. 2. The bearing unit for a conveyance device with an abnormality detection function according to claim 1, wherein the power generation element is a thermoelectric generation element.
6. The bearing unit for a conveyance device with an abnormality detection function according to claim 3, wherein the sensor is at least one of a vibration sensor, a temperature sensor, and a rotation sensor.
7. 2. The conveyance device bearing unit with an abnormality detection function according to claim 1, wherein the transmitter transmits identification information of the conveyance device bearing unit as the signal to be transmitted.
8. 4. The bearing unit for a conveyance device with an abnormality detection function according to claim 3, further comprising storage means for storing information including the status of the rolling bearing detected by the sensor.
9. 2. The bearing unit for a transport apparatus with an abnormality detection function according to claim 1, further comprising a GPS terminal, which is a terminal of a global positioning system, provided in the housing.
10. 2. The bearing unit for a conveyance device with an abnormality detection function according to claim 1, wherein the conveyance device is a belt conveyor.
11. 11. The housing according to claim 10, wherein the housing is a member provided at an end of a cylindrical body on an outer periphery of a conveyor roller on which a belt of the belt conveyor is hung, and the rolling bearing is provided between a fixed shaft and the housing. A bearing unit for a conveyance device with an abnormality detection function that rotatably supports the conveyor roller interposed between the two.
12. In Claim 11, the synthetic resin cover which covers the end surface of the cylindrical body is provided in the conveyor roller, and the transmitter is between the antenna of the transmitter and the cover in the space inside the cover. A bearing unit for a conveyance device with an abnormality detection function arranged at a location where no radio wave shielding member is interposed.
13. 11. The bearing unit for a conveyance device with an abnormality detection function according to claim 10, wherein the housing is a plumer block bearing box that supports a rotation shaft of a conveyor roller that is provided with a belt of the belt conveyor.
14. In Claim 13, the bearing box of the plummer block is composed of a housing main body having openings facing both end faces and inserting a shaft into one end opening, and a lid member closing the other end opening of the housing main body, The bearing unit for conveyance devices with an abnormality detection function which installed the said transmitter and the said power supply in the said cover member.
15. Conveyor equipment with an abnormality detection function in which one or more bearing units for a conveyance device with an abnormality detection function according to claim 1 are provided on each of a plurality of conveyors.
16. In Claim 15, the centralized control board which collects and monitors each information which the said transmitter transmits of each bearing unit of the said one or more conveyance apparatus bearing unit with an abnormality detection function with which each of these conveyors was equipped, and Conveyor equipment with an abnormality detection function provided with a relay device that receives, amplifies and wirelessly transmits the information transmitted by the transmitter between the plurality of conveyors.
17. The bearing unit for a conveyance device with an abnormality detection function according to claim 1, and a monitoring device having a receiver that receives the signal transmitted by the transmission circuit unit and an abnormality determination unit, and the abnormality determination unit includes: A bearing unit monitoring system for determining an abnormality from a change in an interval of signals transmitted from a transmitter and received by the receiver.
18. 18. The abnormality determination unit according to claim 17, wherein the abnormality determination unit always includes a signal interval in a reference period or a reference transmission count that is determined in the past, and a signal interval of a currently determined target period or target transmission count. Is a bearing unit monitoring system that makes an abnormality judgment by comparing with.

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