JP2893018B1 - Bearing soundness determination method and its determination device - Google Patents

Abstract

An object of the present invention is to determine a damaged state of a bearing by examining a long-cycle large motion from long-term collected data. SOLUTION: A plurality of tracing styluses 17 for measuring the amount of movement of a support portion of a bridge or other structure, that is, a support portion on the site side.
a to 17d and the data storage device 22 are installed and the movement amount data of each tracing stylus is collected and stored at predetermined time intervals, so that measurement can be performed for a long time with low power consumption. Then, the data storage device 2 after data collection
2 is withdrawn, connected to the computer 30, and a predetermined calculation is performed using the movement amount data to display a graph, thereby making it possible to determine the soundness of the bearing and the damaged portion of the bearing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for judging the soundness of a bearing for judging the soundness of a bearing of a bridge or other various structures.

[0002]

2. Description of the Related Art Generally, a bearing is interposed between an upper structure and a lower structure of a bridge in a road structure, absorbs the movement of the upper structure, and reduces the load and the movement of the upper structure. It has a role to smoothly transmit to structures, and is a very important structure for bridges and the like.

[0003] Such a bearing forms a part of a bridge structure and is used for a long period of time, so that it causes damage, wear and the like (hereinafter, collectively referred to as damage), but depending on the degree of damage. There is a serious problem that the movement of the upper structure is restricted, and the load or the like cannot be smoothly transmitted to the lower structure, thereby accelerating damage to the bridge.

[0004] In particular, when the bearing is severely damaged, it is necessary to replace the bearing itself by a large-scale operation, and when the degree of damage is small, it is necessary to prevent the damage from spreading by small repairs.

[0005] Therefore, inspection management, investigation, judgment, etc.
It is important to determine the soundness of the bearing. Conventionally, as a method for determining the soundness of such a bearing, the displacement state of a shoe located above the bearing is determined by appearance, palpation, percussion, and the like, and further using a dial gauge (strain gauge). .

[0006] The judgment method based on the appearance is a method in which a maintenance worker visually observes the displacement state and the degree of damage of the shoe, and the judgment method based on palpation touches the shoe with the hand.
This is a method of determining the degree of damage from past experience. The judgment method based on percussion is a method of hitting a shoe or the like with a hammer or the like and judging the soundness of the bearing from the reverberation sound.

[0007] Further, in the method of making a determination using a dial gauge, a dial gauge is attached to a required portion of a bearing, and
In this method, the analog signal measured by the gauge is captured and recorded on a chart paper, and the soundness of the bearing is determined from the recorded result.

[0008]

However, of the above-mentioned determination methods, the determination methods based on the appearance, palpation, percussion, etc. of the former three rely on the experience and intuition of the maintenance worker in many cases. There is a problem that variation occurs and cannot be determined quantitatively and qualitatively.

On the other hand, the method of recording on a chart paper using a dial gauge and making a determination uses a chart paper of a recording device installed on site without a commercial power supply. It is possible to investigate movements with relatively short cycles, that is, live loads, but it is difficult to investigate trends with respect to static loads that capture long, long-cycle movements, such as following changes in bridge temperature. There is a problem that the soundness cannot be accurately determined as to which part of the bearing is damaged.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a support soundness judging device capable of judging the soundness of a support with high accuracy. It is another object of the present invention to provide a bearing soundness judging device for measuring a moving state of each point of a bearing over a long period using a battery power supply.

Further, another object of the present invention is to measure the moving state of each part of the bearing, perform a predetermined calculation, and display the graph, thereby making it possible to determine the soundness of the bearing and the damaged part with high accuracy. An object of the present invention is to provide a bearing soundness judging device.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method in which a measuring element is installed at a plurality of locations on a support of a bridge or other structure, and measurement outputs of the measuring elements are collected. By calculating the difference between the outputs and the ratio of each difference, it is assumed that a fixed ratio relationship is established between the amount of movement of the upper and lower plates constituting the bearing and the amount of movement of the rollers between the upper and lower plates. Based on the ratio relationship and the ratio of the differences, it is possible to determine not only the soundness of the bearing, but also the damaged portion of the bearing.

Another aspect of the present invention is a bearing soundness judging device for judging the soundness of a bearing of a bridge or other structure. A plurality of tracing styluses for measuring only the movement amount in the bridge axis direction and the movement amount in the vertical direction, and a data storage device for collecting and storing the measured movement amount of the tracing stylus at predetermined time intervals set in advance from outside. The moving amount, which is a measurement output of the plurality of tracing styluses, for determining the soundness of the bearing for a long time with low power consumption can be measured.

By taking such measures, the data storage device itself captures and stores the movement amount, which is the measurement output of a plurality of tracing styluses, at a time set from, for example, an external personal computer, for example, every 10 minutes. Except when moving distance data is collected, only the stored data is stored and saved, so power consumption is very low, measurement can be continued for a long time, and only conventional dynamic measurement can be performed. Rather, static measurements that measure large movements over long cycles are also possible.

Still another aspect of the present invention provides a plurality of tracing styluses which are provided at a plurality of predetermined positions of a bearing and measure only the amount of movement in the bridge axis direction or the amount of movement in the bridge axis direction and the amount of vertical movement at the plurality of positions. A thermometer for measuring the surface temperature of a bridge or other structure, a data storage device for collecting and storing a measured movement amount and a measured temperature of the probe at predetermined time intervals set in advance from outside, and a data storage device for storing the data A computer which is detachably connected to the apparatus, wherein the computer reads and stores a measurement movement amount by the plurality of probes and a measurement temperature of the thermometer stored in the data storage device. Means, theoretical value calculating means for calculating the theoretical amount of movement using the length, material, and temperature of the bridge and other structures; theoretical value of moving amount obtained by the theoretical value calculating means; It is sound determination apparatus of the bearing provided with a graphical display means for creating and displaying a graph with the measured amount of movement.

By taking such measures, after withdrawing the data storage device from the site, the computer reads the measured data from the data storage device, obtains the theoretical amount of movement using the surface temperature of the structure, and Since the graph is displayed using the theoretical amount of movement and the measured amount of movement of each stylus, a certain degree of soundness of the bearing can be determined from the relationship between the measured amount of movement of each stylus and the theoretical amount of movement.

Still another aspect of the present invention is directed to a plurality of tracing styluses which are installed at a plurality of predetermined positions of a bearing and measure only the amount of movement in the bridge axis direction or the amount of movement in the bridge axis direction and the amount of vertical movement at the plurality of positions. A data storage device that collects and stores the measurement movement amount of the tracing stylus at predetermined time intervals set from outside, and a computer that is detachably connected to the data storage device; Data reading and storing means for reading and storing the measurement movement amounts of the plurality of measurement elements stored in the apparatus, and calculating a difference between the measurement movement amounts of the respective measurement elements read by the data reading and storage means and a ratio of each difference. Ratio calculating means, and a graph displaying means for creating and displaying a graph using the ratio obtained by the ratio calculating means and enabling the soundness of the bearing to be determined. Than it is.

By taking such measures, after the data storage device is withdrawn from the site, the data storage device is connected to the computer. Then, after reading the measurement data stored in the data storage device, the computer calculates the difference between the measurement movement amounts of the respective measurement elements and the ratio of each difference,
By creating and displaying a graph using the ratio obtained by this calculation, it is possible to easily determine the presence or absence of soundness of the bearing and the damaged portion of the bearing from the magnitude relationship between the calculated ratio and the ratio when the bearing is normal.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment of Invention Regarding Method of Determining Soundness of Bearing) FIG. 1 is a diagram for explaining a basic operation principle in a method of determining soundness of a bearing according to the present invention.

On the lower side of the upper structure 1 such as a bridge, a bearing 2 is provided which has a function of absorbing the movement of the upper structure and smoothly transmitting the load and movement of the upper structure to the lower structure. .

The bearing 2 is a generally used roller shoe, in which a plurality of rollers 13,... Are interposed between a lower shoe 11 as an upper plate and a bottom plate 12 as a lower plate. The necessary parts of the member are surrounded by a cover 14. Although not shown, a substructure such as a foundation structure made of concrete or other material, a floor structure, or the like is provided at the bottom of the bearing 2. 15 is an upper shoe, and 16 is a hinge pin.

By the way, the present inventors have found that the measuring elements 17a to 17d such as strain gauges (strain gauge type transducers) for measuring the movement at the necessary positions of the bearing as described above.
Are installed, and A, B, C, and L are taken out of the measurement outputs of the tracing styluses 17a to 17d, and the relationship between these measurement outputs is examined. As a result, it is found that the following constant relationships are obtained. . However, the tracing stylus 17a is the roller 1
The measuring element 17b measures the moving amount of the roller shaft in the bridge axis direction, and the measuring element 17c measures the moving amount of the lower plate across the rollers 13,. The axial movement amount is measured, and 17d measures the variable distance between the upper and lower plates, that is, the vertical movement amount of the shoe between the upper and lower plates. Note that the measuring elements 17a to
The 17d strain gauge type transducer is configured to convert an analog measurement movement amount into a digital movement amount and output the digital movement amount.

Now, the measurement outputs of the probes 17a to 17d are A, B, C, and L, and the difference between the measurement outputs of the probes is set as follows. X = AC (1) Y = BC (2) Z = AB (3) Here, when the ratio relationship between X, Y, and Z is examined, the bearing 2 is sound. In this case, the following relationship is established: X: Y = 1: 0.5, Z: Y = 0.5: 0.5 = 1: 1 (4). The reason is the same as the principle of the moving pulley, with respect to the axial movement amount of the roller 13 (bridge axis movement amount).
This is because the lower shoe 11, which is the upper plate, moves twice as much. However, it is assumed that the bottom plate 12 as the lower plate is fixed. L is a constant value when the bearing is sound. Initially, L = 0 is set. This ratio relationship is constant even for the passage of vehicles on the bridge, occurrence of earthquakes, changes in temperature, and the like.

However, it has been found that when the components of the bearing 2 are damaged, the above-mentioned ratio relationship is broken and the ratio relationship becomes as shown in FIG. That is, in the case of a sound bearing, X: Y = 1: 0.5, and X = Y with respect to X = 1. (1) When the roller 13 is deformed, although it depends on the degree of deformation, when the roller 13 is slightly deformed, the value becomes close to Y = 0.5, and L becomes wavy. (2) When the upper surface of the roller 13 is worn, the upper roller 13 is flat, and the lower shoe 11 is actively moved. Therefore, for X = 1, Y is <0.5.
Becomes (3) The opposite is true when the lower surface of the roller 13 is worn. (4) Further, when the lower surface of the lower shoe 11 is worn, similarly to the case where the upper surface of the roller 13 is worn, the lower shoe 11 is actively moved, so that for X = 1, Y is <0.5. Become.

Although not shown, the Z: Y ratio also differs depending on the damage of the components of the bearing 2. Therefore, the ratio relationship between when the bearing is healthy and when the bearing member is damaged and the amount of movement of the bearing upper and lower plates and the rollers are stored in advance as reference data for determination, and the ratio of the difference between the measurement outputs of the measuring elements 17a to 17d is determined. If the amount of movement of the bearing upper and lower plates and rollers, the relationship between the previously set ratio of when the bearing is healthy and the bearing member is damaged, and the state of the amount of movement of the bearing upper and lower plates and rollers are displayed in a graph, The damage state of each component can be determined.

Therefore, according to the above-described embodiment, the measuring elements 17a to 17d are installed at predetermined positions of the bearing 2, and the ratio relationship between the measurement outputs of the measuring elements 17a to 17d and the upper and lower plates and The amount of movement of the roller is displayed as a graph, or the ratio relationship between the differences in the measurement outputs of the tracing styluses 17a to 17d, the amount of movement of the upper and lower plates and the roller, the ratio relationship when the bearing is sound, and the state of the amount of movement of the upper and lower plates and the roller. Is graphically displayed, the presence or absence of soundness of the bearing 2 and which component member is damaged at the time of damage can be easily determined, and accurate determination without variation can be performed.

In the above-described embodiment, the soundness of the bearing 2 is determined using the ratio relationship and the amount of movement of the upper and lower plates and rollers as shown in FIG. By measuring only the amount of movement of the roller, the soundness of the bearing 2 to some extent can be determined.

Although the present invention is applied to the roller shoe bearing 2, the soundness of the bearing 2 can be determined by applying the same principle to other bearings. FIG. 3 is a block diagram showing an embodiment of a bearing soundness judging device according to the present invention.

This soundness judging device is provided at a plurality of predetermined positions on the bearing 2 and measures the amount of movement in the bridge axis direction and the amount of vertical movement at those points. Probe 1
7a to 17d, a digital thermometer 21 for measuring the temperature of the upper structure and the temperature of the outside air, and tracing styluses 17a to 17d
And a data storage device 22 such as a digital strain recorder that captures and stores the measurement data of the thermometer 21 at predetermined time intervals.

The data storage device 22 has at least a clock for counting time, a function for storing and holding a measurement time interval and the number of measurements set from an external computer 30 such as a personal computer, and a measurement based on the time of the clock. Each time the time interval is reached, a function of taking in the measured movement amount of each of the tracing styluses 17a to 17d and the measured temperature of the thermometer 21 and sequentially storing them in chronological order and a battery power supply are provided. The measurement time interval differs between dynamic measurement and static measurement, and is set to, for example, 0.1 second in the case of dynamic measurement, and to 10 minutes in the case of static measurement.

Next, the operation of the above device will be described. First, each of the probes 17a to 17d and the thermometer 2
1 at a predetermined position, and a time interval for collecting measurement data from an external computer 30 such as a personal computer, for example, “10” for static measurement.
For example, in the case of measurement over one day, the number of measurements “144” is set in the data storage device 22.

Thereafter, when the operation of the data storage device 22 is started, the measurement time data, the measurement movement amount data of each of the tracing styluses 17a to 17d, and the measurement temperature data of the thermometer 21 each time the built-in clock elapses 10 minutes. And chronologically store them in a predetermined storage area sequentially.
The set number of measurements is incremented by “1”, or “1” is subtracted from the preset number of measurements “144”.

Then, while taking in the measured movement amount data and the measured temperature data every 10 minutes as described above,
The measurement is repeatedly performed “144 times”, and when the measurement is completed, the tracing styluses 17 a to 17 d and the data storage device 22
To remove.

Therefore, according to the above-described configuration, only the measured movement amount data of each of the tracing styluses 17a to 17d and the measured temperature data of the thermometer 21 are simply taken in and stored in sequence at each measurement time interval. During this time, the power required to hold the stored collected data is used, so that the movement state of the bearing can be reliably measured over a long period of time using only the battery power supply. Therefore, the present apparatus can sufficiently cope with not only dynamic measurement but also static measurement for one week, for example, such as following a temperature change of a bridge.
Data related to the movement of a large bearing having a so-called long cycle can be reliably collected.

The data storage device 22 can be connected to an auxiliary battery if necessary, or can be connected to a commercial power supply using an AC-DC adapter. (Second Embodiment of Apparatus Soundness Judgment Apparatus) FIG. 4 is a block diagram showing another embodiment of a bearing soundness judgment apparatus according to the present invention.

In this embodiment, the computer 30 fetches the measurement data stored in the data storage device 22, calculates the theoretical amount of movement, the difference between the measurement data of each tracing stylus, and the ratio of the difference, and displays the graph. This is an example of a mode for performing display.

The apparatus for determining the soundness of a bearing uses the data storage device 22 described in the first embodiment and the respective measurement elements 17a to 17d and the respective measurement data of the digital thermometer 21 collected by the data storage device 22. It is constituted by a computer 30 which is a data processing device that reads and executes a predetermined process.

The computer 30 includes an input device 31 for inputting an instruction to start reading data from the data storage device 11 and other necessary data and instructions, and a ratio of X: Y, Z: Y or the like based on the above equation (4). In addition to the data, for example, a measurement time area, a movement amount data area corresponding to each of the tracing styluses 17a to 17d, a difference between the respective measurement data and a ratio area of the difference, a temperature data area of the upper structure, an outside air temperature data area, and the like. Receiving a reading start instruction from the input device 31, sequentially collects measurement data from the data storage device 22 through the input / output port 33 in ascending order of the number of times of measurement, and stores the data in the corresponding area of the data buffer 32 in chronological order. And a data reading and storing means 34 for storing the data in the memory.

Further, the computer 30 has an arithmetic processing program 35 and the arithmetic processing of the equations (1) to (4) according to the program 35, that is, the difference between the respective movement amount data A, B, C, A difference / ratio calculating means 36 for sequentially calculating the ratio of the differences and storing the difference / ratio in a corresponding area, a graph display program 37, an image memory 38, and one or more moving amount data and upper data according to the graph display program 37. A line graph relating to the structure temperature data is created and displayed on the display unit 39 via the image memory 38, and a graph relating to a ratio as a calculation result is created and displayed via the image memory 38 in accordance with another display instruction from the input device 31. A graph display processing means 40 for displaying on the device 39 is provided. 41 is a printer device.

Next, the operation of the above apparatus will be described with reference to FIG. After withdrawing the data storage device 22 from the site and bringing it back to the office, the data storage device 22 is connected to the computer 30.

When a data reading instruction is input from the input device 31 in this state, the data reading and storage means 34 reads the measurement time data stored in the data storage device 22 through the input / output port 33, the measuring elements 17a to 17d. The measured movement amount data, the upper structure surface temperature, and the outside air temperature are sequentially read in the measurement order and stored in the corresponding area of the data buffer 32 (S1). FIG. 6 shows the data buffer 32.
FIG. 3 is a diagram showing an example of a data arrangement area of FIG.

After reading and storing the measurement data for the total number of measurements as described above, the conventional general program is used in accordance with the arithmetic processing program 35 by using the length, material and surface temperature of the upper structure. The theoretical value of the movement amount is sequentially obtained by the arithmetic expression (temperature change × linear expansion coefficient × stretched girder length) used for the calculation, and is sequentially stored in the corresponding area of the data buffer 32. Further, the differences X, Y, and Z between the measurement movement amount data A to C of the respective tracing styluses 17a to 17d are obtained, and the ratios of these differences X, Y, and Z are sequentially obtained and stored in the corresponding area (S2). .

The bottom plate 12, which is the lower plate, is usually in a fixed state, and its movement amount is considered to be zero, so that the tracing stylus 17c can be omitted. In this case, X = A and Y = B, and the calculation of the difference between the moving amounts, X and Y, becomes unnecessary.

When the theoretical values of the movement amount and the differences X, Y, Z between the measured movement amount data A to C and the ratio of the difference are obtained, the graph display means 40 is executed.
The graph display means 40 starts a graph display program 37 based on the movement amount and the theoretical value selection display instruction from the input device 31 and sequentially reads the corresponding data from the data buffer 32 according to the program 37 to create a graph ( S3), the display device 3 via the image memory 38
9 is displayed as a graph.

FIG. 7A shows the measuring elements 17a and 17a.
6B is an example in which the measured movement amounts A and B by b, the surface temperature of the upper structure, and the theoretical movement amount are graphically displayed. As is clear from this graph, the characteristic shows that the theoretical movement amount obtained from the surface temperature of the upper structure and the movement amount A of the lower shoe 11 are approximately similar. This means that the bearing is sound in static measurements. Therefore, the operator can determine the state of the movement of the bearing to some extent from the graph display. The figure is an example of measurement over one week.

Next, the graph display means 40 is connected to the input device 3.
Based on the difference / ratio selection display instruction from 1, a graph display program 37 is started, and the corresponding data is sequentially read from the data buffer 32 according to the program 37 and plotted to create a graph (S 3). A graph is displayed on the display device 39 via the display. FIG.
(B) is a diagram showing the state. This indicates that the bearing is sound because Y is on the line of approximately 0.5 for X = 1. If there is a relationship of two or more stages shown in FIG. 2, the operator can determine which of the support structures has a problem according to the magnitude relationship based on 0.5.

Whether the graphs shown in FIGS. 7A and 7B are individually displayed on the display device 39 or simultaneously displayed is determined arbitrarily as needed. Therefore, according to the above-described embodiment, the data storage device 22 is connected to the tracing styluses 17a to 17d provided at predetermined positions of the bearing, and the data storage device 22 is provided at predetermined time intervals. Since only the measurement outputs of the tracing styluses 17a to 17d and the temperature of the thermometer 21 are taken and stored in chronological order, data can be collected with low power consumption, and not only dynamic measurement but also several days or one week It can fully respond to long-term measurements over a long period of time, and it is also possible to investigate trends against static loads that capture large movements with long cycles.

After the data storage device 22 has been withdrawn from the site, the measured movement amount and the measured temperature stored in the data storage device 22 by the computer 30 are collected, and the difference between these measured movement amounts and the ratio of each difference are determined. Since the graph is displayed after the calculation, it is possible to accurately determine whether the bearing 2 is sound or which member has any damage from the graph. In addition, by using the amount of vertical movement of the supporting member, that is, the state of the amount of movement between the upper and lower plates, it is possible to more accurately determine which member has been damaged and which member has been damaged.

Further, if initial conditions for measurement are set in the data storage device 22, data can be reliably collected even when the apparatus is left unattended, thereby reducing labor costs and simplifying maintenance work. it can.

In the above-described embodiment, the movement amounts of the four points of the bearing 2 are measured. However, the damage of the bearing and the like can be determined by measuring the same ratio relationship in the measurement of more points.

[0051]

As described above, according to the present invention, the following effects can be obtained. According to the first aspect of the present invention, by measuring the amount of movement of each part of the bearing, the ratio of the amount of movement of each part of the bearing is determined based on the principle of operation of the bearing components, thereby ensuring the soundness of the bearing. In addition, the damaged portion can be determined.

According to the second aspect of the present invention, since the data storage device is installed on the site side and only the movement amount of each bearing is measured at a predetermined time interval, the power consumption can be reduced, and the battery consumption can be reduced. Long-time measurement is possible even with a power supply, and not only dynamic measurement but also static measurement is possible.

According to the third aspect of the present invention, the moving amount data of each bearing and the temperature data of the upper structure collected in the data storage device are read by a computer, and the theoretical moving amount value is obtained from the temperature of the upper structure. Thereafter, since the theoretical movement amount and the movement amount data are graphically displayed, it is possible to determine a certain state of each portion of the bearing depending on whether the movement amount data approximates the movement amount theoretical value.

According to the fourth aspect of the present invention, the difference between the movement amount data of each portion of the bearing and the ratio of the difference are calculated, and the ratio of the difference is graphically displayed, so that the presence or absence of soundness of the bearing and the bearing are calculated. Can be determined with high accuracy.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a bearing installed on a bridge for explaining a method of determining the soundness of a bearing according to the present invention.

FIG. 2 is a diagram illustrating a relationship between a damaged state of a bearing, a ratio X: Y, and an amount of movement between upper and lower plates (vertical direction).

FIG. 3 is a configuration diagram showing an embodiment of a soundness determination device for a bearing according to the present invention.

FIG. 4 is a configuration diagram showing another embodiment of the soundness determination device for a bearing according to the present invention.

FIG. 5 is a diagram illustrating a processing procedure by a computer.

FIG. 6 is a diagram showing an example of a data array of a data buffer on the computer side.

[Fig. 7] The amount of movement of each part of the bearing, the surface temperature of the superstructure,
The figure which displayed the ratio calculated | required from the difference of a movement amount theoretical value and a movement amount by a graph.

[Explanation of symbols]

 2. Bearing 11 Upper plate (lower shoe) 12 Lower plate (bottom plate) 13 Rollers 17a to 17d Measuring element 21 Digital thermometer 22 Data storage device 30 Computer 34 Data reading storage device 36 Difference・ Ratio calculation means 40 ... Graph display means

Claims (4)

(57) [Claims] 1. A method for judging the soundness of a bearing of a bridge or other structure, comprising: installing a measuring element at a plurality of predetermined positions on the bearing; and collecting a measured movement amount of each measuring element. A method for determining the soundness of the bearing by determining the difference between the measured movement amounts and the ratio of each difference. 2. A bearing soundness judging device for judging the soundness of a bearing of a bridge or other structure, wherein said soundness judging device is installed at a plurality of predetermined positions of said bearing, and only the movement amount in the bridge axis direction of said plurality of positions or the bridge axis direction. A plurality of tracing styluses for measuring a moving amount and a vertical moving amount, and a data storage device for collecting and storing the measured moving amount of the tracing stylus at predetermined time intervals set in advance from outside, and has a low power consumption. Wherein the measuring movement amounts of the plurality of measuring elements for determining the soundness of the bearing for a long time can be measured. 3. A bearing soundness judging device for judging the soundness of a bearing of a bridge or other structure, wherein said soundness judging device is installed at a plurality of predetermined positions of said bearing, and only the movement amount in the bridge axis direction of said plurality of positions or the bridge axis direction. A plurality of measuring elements for measuring a moving amount and a vertical moving amount, a thermometer for measuring a surface temperature of the bridge and other structures, and a measuring movement of the measuring element at predetermined time intervals set in advance from outside A data storage device for collecting and storing the amount and the measured temperature, and a computer detachably connected to the data storage device, wherein the computer is configured to perform measurement by the plurality of probes stored in the data storage device. A data reading and storing means for reading and storing the movement amount and the temperature measured by the thermometer; and a process for obtaining a movement amount theoretical value using the length, material and temperature of the bridge and other structures. Value calculating means, integrity determining device of the bearing, characterized in that a graph display means for creating and displaying a graph with a moving amount theoretical value and the measured amount of movement obtained in this theoretical calculation means. 4. The apparatus according to claim 2, further comprising: a computer detachably connected to the data storage device, wherein the computer is configured to store the plurality of measurements stored in the data storage device. Data reading and storing means for reading and storing the measured movement amount of the stylus; ratio calculating means for calculating the difference between the measured movement amounts of each stylus and the ratio of each difference read by the data reading and storing means; And a graph displaying means for generating and displaying a graph using the ratio obtained by the means so as to determine the soundness of the bearing.