JP5261058B2 - Measuring device and railway vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device which is both easy to mount and dismount and which secures measurement accuracy, and to provide a railway vehicle. <P>SOLUTION: This measuring device 5 is fixed on a surface on the rail R side of an axle box 4 by a sensor fixing member 8a and the fourth fixing member 8b, and each shape of a box member 21 and a lid member 22 of the measuring device 5 is constituted symmetric with respect to both straight lines, namely, a virtual straight line L1 formed by connecting a pair of sensor fixing members 8a, and a virtual straight line L2 orthogonal to the virtual straight line L1 and passing a middle point of the pair of sensor fixing members 8a, in a plan view. A sensor member 9 is disposed on the virtual straight line L1. Hence, the measurement accuracy of the sensor member 9 can be secured, by suppressing the resonance between the box member 21 and the lid member 22. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a measuring apparatus and a railway vehicle, and more particularly to a measuring apparatus and a railway vehicle that can be easily attached and detached and can ensure measurement accuracy.

  Conventionally, it has been known that the state of the rail greatly contributes to the stability of the railway vehicle and the ride comfort of the passenger, and maintaining the good state of the rail in order to maintain the stability of the vehicle and the ride comfort of the passenger. Was needed. For this reason, it is necessary to know the state of the rail, and a technique for measuring the state of the rail by attaching an acceleration sensor to the axle box that supports the wheel and measuring the acceleration of the axle box is disclosed (Patent Document 1). ).

  In this technique, an acceleration sensor is attached to the axle box of a plurality of business vehicles, and the acceleration is measured, whereby the state of the rail can be measured every time the business vehicles travel. Therefore, if an abnormality occurs in the rail, the abnormality can be detected at an early stage, rather than measuring the state of the rail with a dedicated measurement vehicle that can travel only when the business vehicle is not traveling. .

  On the other hand, since several business vehicles are replaced for maintenance, it is necessary to remove the attached acceleration sensor and replace it with a business vehicle to be operated when servicing a business vehicle to which an acceleration sensor is attached. Therefore, the detachability of the acceleration sensor is important. On the other hand, since it is not necessary to remove the acceleration sensor, it is possible to determine the mounting position with an emphasis on measurement accuracy.

  Here, since the axle box of a railway vehicle supports the weight of the structure via a spring, the lower side of the axle box protrudes to ensure strength. The axle box is structured to swing (circular movement in the left-right direction of the vehicle) about the axle for structural reasons.

  Therefore, if the acceleration sensor is attached to the lower surface side of the axle box, the distance from the axle to the acceleration sensor is longer than when the acceleration sensor is attached to the upper surface side, so that the centrifugal force acting on the acceleration sensor is increased. Therefore, since the centrifugal force measured by the acceleration sensor is increased, the measurement accuracy is deteriorated as compared with the case where the acceleration sensor is attached to the upper surface side.

  Further, the lower surface side of the axle box is less rigid than the upper surface side for structural reasons, and unnecessary vibration such as resonance is likely to occur. For this reason, when the acceleration sensor is attached to the lower surface side, unnecessary vibration such as resonance is measured, so that the measurement accuracy is deteriorated as compared with the case where it is attached to the upper surface side.

Therefore, in the measurement-dedicated vehicle, the acceleration sensor is attached to the upper surface side that is not easily affected by the centrifugal force and hardly generates unnecessary vibration such as resonance in order to ensure measurement accuracy.
JP-A-8-184426

  However, in the conventional railway vehicle described above, when the acceleration sensor is attached to the upper side of the axle box, the lateral side of the axle box is surrounded by the spring and the wheel. Thus, there is a problem that it is difficult to attach and detach the acceleration sensor. Further, when an acceleration sensor is attached to the lower side of the axle box, there is a problem that it is difficult to ensure measurement accuracy.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a measuring apparatus and a railway vehicle that can be easily attached and detached and can ensure measurement accuracy.

In order to achieve this object, the measuring device according to claim 1 is used in a railway vehicle whose wheels are supported by the axle box, and the state of the rail on which the wheels roll is determined by measuring the acceleration of the axle box. And a lid member that is disposed on the opening side of the concave portion and forms a space between the concave portion by closing the concave portion, and has a predetermined virtual straight line in plan view. A box configured symmetrically with respect to each of a first virtual straight line and a second virtual straight line that is a virtual straight line orthogonal to the first virtual straight line, and a sensor that measures the acceleration of the axial box housed in the space And a first fixing member and a second fixing member for fixing the box to the rail side of the axle box, and the first fixing member in a plan view when the box is fixed to the rail side of the axle box And the second fixing member are arranged on the first virtual straight line. It is, together with the intermediate position between the first fixing member and the second fixing member overlap to the second virtual straight line, is and disposed on the second imaginary straight line sensor member is a first virtual straight line, the box is An elastic member disposed between the sensor member and the lid member and between the sensor member and the box member, and the sensor member is disposed by the elastic member in a state where the lid member is in close contact with the opening side of the box member. that have been held.

The measuring device according to claim 2 is the measuring device according to claim 1, wherein the box includes a spacer member configured in a substantially flat plate shape, the spacer member being sandwiched between the lid member and the box member, The pre-compression amount of the elastic member is adjusted by adjusting the distance between the recess and the lid member.

According to a third aspect of the present invention, in the measurement apparatus according to the second aspect , the box includes a third fixing member that fixes the lid member, the box member, and the spacer member.

The measuring device according to claim 4 is the measuring device according to any one of claims 1 to 3 , wherein a power line holding member to which a power line for supplying power to the sensor member is fixed, and the power line holding member to the shaft box are fixed. The power line holding member is configured as a separate member from the box body.

The measuring device according to claim 5 is the measuring device according to any one of claims 1 to 4 , wherein the sensor member is configured to be smaller than the first sensor member for measuring the acceleration of the axle box and the first sensor. The first sensor member is disposed on the first virtual line and the second virtual line, and the second sensor is disposed on the first virtual line in plan view. They are arranged symmetrically with respect to the first virtual straight line.

A railway vehicle according to a sixth aspect is provided with the measuring device according to any one of the first to fifth aspects.

  According to the measuring apparatus of the first aspect, the wheel is oscillated by rolling the wheel on the rail, and the acceleration of the oscillated shaft box is measured by the sensor member. Here, in the conventional measuring apparatus, since the box is fixed to the rail-side surface of the axle box, the operator can use the space between the rail and the axle box for attaching / detaching the box, While there is an effect that the box can be easily attached and detached, there is a problem that the measurement accuracy is deteriorated because the fixed position is separated from the axle box.

  On the other hand, in the present invention, the box and the sensor member are symmetrical with respect to the first virtual line and the second virtual line. Therefore, since the resonance of the box can be suppressed and the measurement accuracy of the measurement device can be ensured, it is possible to achieve both easy attachment and detachment and ensuring the measurement accuracy. That is, there is an effect that the attachment / detachment is easy and the measurement accuracy can be secured.

Furthermore , since the sensor member is held by the elastic member, the low-frequency acceleration (about 100 Hz or less) transmitted from the axle box to the sensor member can be attenuated by the elastic force of the elastic member. That is, since the acceleration at a low frequency (about 100 Hz or less) is noise (unnecessary signal) in measuring the rail state, the S (signal) / N (noise) ratio is reduced by attenuating the noise. As a result, the measurement accuracy can be improved.

  Further, since the elastic member is pre-compressed between the lid member and the box member, the elastic force of the elastic member acts as a pressing force on the lid member and the box member. Therefore, the vibration of the lid member and the box member can be suppressed, and the resonance of the lid member and the box member can be suppressed. Therefore, there is an effect that measurement accuracy can be improved.

  In addition, the sensor member can be fixed by disposing the elastic member between the lid member and the sensor member and between the box member and the sensor member. Therefore, compared with the case where the sensor member is fixed inside the box using another member, the box can be reduced in size because it is not necessary to house the other member inside the box. effective.

  Further, since the elastic member is pre-compressed between the lid member and the box member, the strength of vibration transmitted from the axle box to the sensor member can be attenuated by the elastic force of the elastic member. Therefore, the sensor member can be prevented from being damaged.

  In addition, when the elastic member is made of rubber (having insulating properties), electrical noise can be cut off, so the S (signal) / N (noise) ratio is improved and the measurement accuracy is improved. There is an effect that it is possible to improve.

According to the measuring apparatus according to claim 2, wherein, in addition to the effects of the measuring device according to claim 1, by disposing the spacer member between the box member and lid member, the recess and the recess of the box member Since the amount of pre-compression of the elastic member can be adjusted by adjusting the distance from the side surface of the facing lid member, the variation in the amount of pre-compression of the elastic member due to the dimensional tolerance of the box member and the lid member can be adjusted. .

  Therefore, it is possible to suppress variations in the amount of pre-compression among a plurality of measuring devices. Accordingly, since the degree of occurrence of resonance (suppression of low frequencies) of a plurality of measuring devices can be kept uniform, there is an effect that the measurement accuracy can be improved.

  In addition, since the precompression amount of the elastic member can be adjusted by adjusting the distance between the concave portion of the box member and the side surface of the lid member facing the concave portion, the precompression amount of the elastic member is set for each vehicle to be attached. Can be changed.

  For example, business vehicles have various vehicle forms (vehicles with cabins only, vehicles with toilets, vehicles equipped with drive motors, etc.). Therefore, the frequency of vibration transmitted to the measuring device (vibration frequency from the equipment or resonance frequency of the structure) differs depending on the vehicle form. These vibrations are classified as noise, not vibrations indicating the state of the rail.

  On the other hand, in the present invention, since the setting of the precompression amount of the elastic member can be changed for each mounted vehicle, the vibration (noise) transmitted from the vehicle body is changed by changing the frequency attenuated by the elastic member. Can be attenuated accurately. Therefore, there is an effect that it is possible to improve the measurement accuracy by improving the S (signal) / N (noise) ratio.

  For example, when the distance between the concave portion of the box member and the side surface of the lid member facing the concave portion is adjusted by the screwing amount of the bolt, the concave portion of the box member and the side surface of the lid member facing the concave portion While the distance can be adjusted steplessly, the operator has to adjust the amount of screwing, resulting in a problem that the adjustment work takes time.

  In contrast, in the present invention, the distance between the concave portion of the box member and the side surface of the lid member facing the concave portion is adjusted by sandwiching the spacer member between the box member and the lid member. The distance can be adjusted step by step depending on the number of sheets. Therefore, there is an effect that adjustment work can be facilitated.

According to the measuring apparatus of claim 3 , in addition to the effect produced by the measuring apparatus of claim 2 , the box body includes the lid member and the third fixing member that fastens the box member. The operation of assembling the members into the box and the operation of attaching the box to the axle box can be performed separately.

  Here, in the present invention, since the precompression amount of the elastic member can be adjusted without being attached to the axle box, the operator can concentrate on adjusting the precompression amount of the elastic member. As a result, there is an effect that the adjustment work of the precompression amount of the elastic member can be reliably performed.

  Further, since the box body whose precompression amount has been adjusted can be attached to the axle box, the operator can concentrate on the work of attaching the box body to the axle box. Therefore, there is an effect that the mounting operation can be performed reliably. That is, by dividing the work, there is an effect that the certainty of the work performed by the worker can be improved.

  Further, since the adjustment work of the precompression amount and the work of attaching the box body to the axle box can be performed separately, the adjustment work of the precompression amount of the plurality of box bodies can be collectively performed at one place. Therefore, there is an effect that it is possible to improve the efficiency of adjusting the precompression amount.

According to the measurement device of claim 4 , in addition to the effect of the measurement device according to any one of claims 1 to 3 , the power line holding member to which the power line for supplying power to the sensor member is fixed, and the power line holding thereof Since the power line holding member is configured as a separate member from the box body, there is an effect that the measurement accuracy of the measuring device can be ensured.

  For example, when fixing a power line, it is necessary to form a part for fixing the power line in a box. In many cases, the portion for fixing the power line is formed in a long shape in order to suppress an increase in the weight of the box. Therefore, the part for fixing the power line is likely to resonate. Therefore, there is a problem that the resonance of the part for fixing the power line is transmitted to the box and the measurement accuracy of the measuring device is deteriorated.

  On the other hand, in the present invention, the power line is fixed by the power line holding member, which is a separate member from the box, so that the vibration generated by the shake of the power line is suppressed from being transmitted to the box, and the resonance of the box is reduced. Generation can be reduced. Therefore, there is an effect that measurement accuracy can be ensured.

According to the measuring apparatus of the fifth aspect , in addition to the effect produced by the measuring apparatus according to any one of the first to fourth aspects, the first sensor member and the second sensor member are arranged on the first imaginary straight line. Thus, since it is arranged symmetrically with respect to the first imaginary straight line, there is an effect that measurement accuracy can be improved by suppressing resonance.

According to the railway vehicle of the sixth aspect, the same effect as that of the measuring apparatus according to any one of the first to fifth aspects is exerted.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, with reference to FIG. 1, the structure of the rail vehicle 100 with which the measuring apparatus 5 was attached is demonstrated. FIG. 1 is a side view of a railway vehicle 100 to which a measuring device 5 according to the first embodiment of the present invention is attached.

  The railway vehicle 100 is a passenger car for transporting passengers, and as shown in FIG. 1, a structure 10 that accommodates a passenger, and a plurality of (two in this embodiment) carts 1 that support the structure 10 It has. A measuring device 5 (see FIG. 2) is attached to the carriage 1.

  Next, the configuration of the carriage 1 will be described with reference to FIGS. 2 and 3. FIG. 2 is a side view of the measuring device 5 attached to the axle box 4, and FIG. 3 is a bottom view of the measuring device 5 viewed from the direction of arrow III in FIG.

  The carriage 1 rolls on the rail R to move the structure 10 (see FIG. 1). As shown in FIG. 2, the wheel 3 that rolls on the rail R, and the wheel. 3 and a shaft box 4 that supports the weight of the structure 10 via the spring 2.

  As shown in FIG. 2, the axle box 4 is configured in a shape in which the upper and lower sides of the letter T are interchanged in a side view (viewed in the vertical direction in FIG. 2), and in the longitudinal direction of the rail R (the left-right direction in FIG. 2). A pair of springs 2 are in contact with the projecting portion. In addition, a pair of reinforcing portions 4a is erected from the opposite side (lower side in FIG. 2) to the side on which the spring 2 abuts. The reinforcing portion 4 a is a reinforcing member that reinforces the strength of the axle box 4.

  A pair of female screws (not shown) are formed on the rail R side (lower side in FIG. 2) of the reinforcing portion 4a. These female screws are arranged along the longitudinal direction of the rail R (the left-right direction in FIG. 2 and the left-right direction in FIG. 3), and are measured by screwing a sensor fixing member 8a and a fourth fixing member 8b described later. The device 5 is attached to the pair of reinforcing portions 4a.

  For example, when the measuring device 5 is mounted on the upper side of the axle box 4 (upper side in FIG. 2) and on the rear side of the wheel 3 (front side in FIG. 2), the side of the upper part of the wheel 3 (upper part in FIG. 2). Since the spring 2 is disposed on the side, there is a problem in that it is difficult to attach and detach the measuring device 5 due to the spring 2 being in the way.

  On the other hand, in the first embodiment, since the measuring device 5 is disposed on the rail side (lower side in FIG. 2) of the axle box 4, the lateral side of the lower part (lower part in FIG. 2) of the wheel 3 Since the work space for the worker can be ensured as long as the spring 2 is not disposed, the worker can easily attach and detach the measuring device 5.

  The female screw formed on the rail R side (the lower side in FIG. 2) of the reinforcing portion 4a is used for attaching a distractor, and is used in a railway vehicle not equipped with a distractor. Is not.

  Therefore, compared with the case where a female thread is formed only for attaching the measuring device 5, the number of female threads can be reduced. Therefore, the processing cost of the cart 1 can be reduced, and the manufacturing cost of the railway vehicle 100 to which the measuring device 5 is attached can be reduced.

  Also, the inside of the axle box 4 is filled with lubricating oil to lubricate bearings and the like that support the axle of the wheel 3, and as shown in FIG. 3, the lubricating oil is discharged between the reinforcing portions 4a. Hole is formed, and the hole is closed with a drain bolt B.

  The measuring device 5 is a device that measures the acceleration of the axle box 4 in order to measure the state of the rail R via the wheels 3, and as shown in FIG. 3, a measuring member 6, a power line holding member 7, The sensor fixing member 8a, the fourth fixing member 8b, and the sensor member 9 (see FIG. 4) are mainly provided.

  The measuring member 6 is a member that measures the acceleration of the axle box 4, and is fixed to a reinforcing portion 4a on the wheel 3 side (lower side in FIG. 3) by a sensor fixing member 8a described later, as shown in FIG.

  The power line holding member 7 is a member for suppressing vibration of a power line 35 to be described later, and is disposed so as to face the reinforcing portion 4a (upper side in FIG. 3) to which the measurement member 6 is fixed, as shown in FIG. It is being fixed to the reinforcement part 4a (FIG. 3 lower side) with the 4th fixing member 8b mentioned later.

  For example, when the power line holding member 7 is omitted, a power line 35, which will be described later, vibrates due to vibrations of the vehicle, traveling wind, and the like. Therefore, when the vibration is transmitted to the measurement member 6, there is a problem that the measurement accuracy of the measurement member 6 deteriorates. On the other hand, in the first embodiment, since the power line holding member 7 fixed to the axle box 4 fixes the power line 35 to be described later, vibration of the power line 35 can be reduced.

  In addition, for example, when the power line holding member 7 is omitted and a power line 35 described later is fixed to the measurement member 6, the vibration of the power line 35 is transmitted to the measurement member 6 and the measurement accuracy of the measurement member 6 deteriorates. There is.

  On the other hand, in the first embodiment, the power line 35 to be described later is fixed by the power line holding member 7 which is a member different from the measurement member 6, so that the vibration of the power line 35 is transmitted to the measurement member 6. Therefore, the measurement accuracy of the measurement member 6 can be ensured.

  The sensor fixing member 8a is a member that is screwed into a female screw formed in the reinforcing portion 4a to fix the measuring member 6 to the axle box 4. As shown in FIG. 3, the pair of sensor fixing members 8a are respectively It is arranged along the longitudinal direction of the rail R (FIG. 2 left-right direction view and 2 (b) left-right direction).

  The fourth fixing member 8b is a member that is screwed into a female screw formed in the reinforcing portion 4a to fix the power line holding member 7 to the axle box 4. As shown in FIG. 3, the pair of fourth fixing members 8b Are arranged along the longitudinal direction of the rail R (the left-right direction view in FIG. 2 and the left-right direction in FIG. 2B).

  Next, the detailed configuration of the measurement member 6 will be described with reference to FIG. 4A is a cross-sectional view of the measurement member 6, and FIG. 4B is a cross-sectional view of the measurement member 6 taken along the line IIIb-IIIb in FIG. 4A.

  For easy understanding, the head of the sensor fixing member 8a, the servo type sensor 31, the vertical strain type sensor 32, and the left / right strain type sensor 33 are shown as side surfaces. The hatching of the first insulating seat 24 and the second insulating seat 25 is omitted in the drawing.

  As described above, the measuring member 6 is for measuring the acceleration of the axle box 4, and as shown in FIG. 4A, the box 20, the lid insulating seat 23, the first insulating seat 24, A second insulating seat 25, a spacer member 26, a pair of elastic members 27, and a third fixing member 8c are provided.

  The box 20 is a member that accommodates a sensor member 9 described later, and includes a box member 21 and a lid member 22 as shown in FIG. As shown in FIG. 4A, the box member 21 is formed into a substantially rectangular box shape in plan view, and has a cross-sectional hat shape in which a concave portion 21a is formed in the center. A pair of through holes 21b are formed through both sides of the recess 21a, and a pair of sensor fixing members 8a are respectively inserted into the pair of through holes 21b.

  The cover member 22 is configured in a substantially flat rectangular shape having the same shape as the box member 21 in plan view, and as shown in FIG. 4A, the longitudinal direction of the cover member 22 (FIG. 4A left-right direction). ) Through holes 22b are formed on both sides. The pitch of these through holes 22b is the same as the pitch of the pair of through holes 21b. Sensor fixing members 8a are respectively inserted into the through holes 22b.

  As shown in FIG. 4A, a space S is formed between the recess 21a and the side surface of the lid member 22 facing the recess 21a (the lower side surface of FIG. 4A). A sensor member 9 described later is accommodated in the space S.

  Further, the shape of the box member 21 and the lid member 22 is defined by a virtual straight line L1 formed by connecting a pair of sensor fixing members 8a and a virtual straight line L1 in plan view (viewed in the direction perpendicular to the paper surface of FIG. 4B). It is configured symmetrically with respect to both straight lines that are orthogonal to each other and a virtual straight line L2 that passes through an intermediate point between the pair of sensor fixing members 8a. Therefore, the resonance of the box member 21 and the lid member 22 can be suppressed, and the measurement accuracy of the sensor member 9 described later can be ensured.

  The third fixing member 8 c is a member that fixes the box member 21 and the lid member 22 to each other, and is inserted into a through hole formed in the lid member 22 as shown in FIG. The box member 21 and the lid member 22 are fastened by being screwed to the formed female screw. Therefore, the operation of assembling the lid member 22 and the box member 21 into the box body 20 and the operation of attaching the box body 20 to the axle box 4 can be performed separately.

  Here, in the first embodiment, the pre-compression amount of the elastic member 27 is adjusted by sandwiching the spacer member 26 between the lid member 22 and the box member 21 when the box body 20 is assembled. That is, even if the box 20 is not attached to the axle box 4, the box 20 can be assembled and the pre-compression amount of the elastic member 27 can be adjusted.

  Therefore, the operator can perform the operation of adjusting the precompression amount of the elastic member 27 without performing the operation of attaching the box 20 to the axle box 4 in parallel. You can focus on adjusting. As a result, the adjustment work of the precompression amount of the elastic member 27 can be reliably performed.

  Further, the box body 20 whose precompression amount has been adjusted can be attached to the axle box 4. Therefore, the operator can perform the work of attaching the box 20 to the axle box 4 without performing the work of adjusting the precompression amount of the elastic member 27 in parallel. You can concentrate on the installation work. As a result, the mounting operation can be performed reliably. That is, by dividing the work, the reliability of the work performed by the worker can be improved.

  In addition, since the adjustment work of the pre-compression amount and the attachment work of the box body 20 to the axle box 4 can be performed separately, the adjustment work of the pre-compression amount of the plurality of box bodies 20 is performed in one place. Can do. Therefore, the efficiency of the pre-compression amount adjustment work can be improved.

  As described above, the box member 21 and the lid member 22 are fastened to the box member 21 by the third fixing member 8 c being screwed into the female screw of the box member 21. Therefore, it is also possible to omit the part of the box member 21 where the through hole 21b is formed and to have the sensor fixing member 8a fix only the lid member 22. In this case, the weight reduction of the box member 21 can be achieved by omitting the portion where the through hole 21b of the box member 21 is formed.

  However, since the box member 21 is fixed only by the third fixing member 8c, the rigidity of the box body 20 composed of the box member 21 and the lid member 22 is lowered, and the resonance frequency shifts to the low frequency side. There is.

  On the other hand, in the first embodiment, since the box member 21 and the lid member 22 are fastened together by the sensor fixing member 8a, the rigidity of the box body 20 is improved and the resonance frequency is shifted to the high frequency side. Can be made. Therefore, the degree of resonance at a low frequency (about 500 Hz or less) can be reduced.

  The lid insulating seat 23 mainly cuts off the current flowing through the carriage 1 with respect to the lid member 22, and as shown in FIG. And the lid member 22.

  The first insulating seat 24 and the second insulating seat 25 are used to block the current flowing mainly through the lid member 22 so as not to flow into the vertical strain sensor 32 and the lateral strain sensor 33, which will be described later. As shown in FIG. 4 (a), it is configured as a thin plate and is disposed between the lid member 22 and a vertical strain sensor 32 and a lateral strain sensor 33 described later.

  The spacer member 26 is a member that adjusts the amount of pre-compression of the elastic member 27 described later. As shown in FIG. 4A, the spacer member 26 is configured in a flat plate shape and is disposed between the box member 21 and the lid member 22. It is installed.

  Therefore, it is possible to adjust the variation in the precompression amount of the elastic member 27 due to the dimensional tolerances of the box member 21 and the lid member 22. Therefore, variation in the amount of pre-compression among the plurality of measuring devices 5 can be suppressed.

  As a result, the degree of resonance (low frequency suppression) of the plurality of measuring devices 5 can be kept uniform, so that the measurement accuracy of the railway vehicle 100 including the plurality of carriages 1 to which the measuring devices 5 are attached can be improved. Improvements can be made. In addition, since the pre-compression amount of the elastic member 27 to be described later is adjusted by changing the number of overlapping spacer members 26, the adjustment work can be facilitated.

  The pair of elastic members 27 is a member that holds a servo-type sensor 31 to be described later, and is composed of a rubber-like elastic body as shown in FIG. 4A, and one elastic member 27 is formed of the recess 21a. The other elastic member 27 is disposed on the side surface of the lid member 22 facing the center of the concave portion 21a. The other elastic member 27 is disposed at the center (intersection of the virtual straight line L1 and the virtual straight line L2). A servo type sensor 31 described later is sandwiched between the elastic members 27.

  As described above, since the servo-type sensor 31 described later is held by the elastic member 27, the low-frequency (about 100 Hz or less) acceleration transmitted from the axle box 4 to the servo-type sensor 31 by the elastic force of the elastic member 27 is obtained. Can be attenuated.

  That is, since the acceleration at a low frequency (about 100 Hz or less) is noise (unnecessary signal) in measuring the rail state, the S (signal) / N (noise) ratio is reduced by attenuating the noise. Thus, measurement accuracy can be improved.

  Further, since the elastic member 27 is pre-compressed between the box member 21 and the lid member 22, the vibration of the lid member 22 and the box member 21 can be suppressed and the resonance of the lid member 22 and the box member 21 can be suppressed. . Therefore, the measurement accuracy of the measurement member 6 can be improved.

  Moreover, since the servo type sensor 31 to be described later is fixed by pre-compressing the elastic member 27 between the box member 21 and the lid member 22, the servo type sensor 31 is attached to the inside of the box body 20 using another member. Compared with the case where it fixes to, the box 20 can be reduced in size because it is not necessary to house another member in the box 20.

  Further, since the elastic member 27 is pre-compressed between the box member 21 and the lid member 22, the acceleration transmitted from the axle box 4 to the servo type sensor 31 described later is attenuated by the elastic force of the elastic member 27. Can do. Therefore, the servo type sensor 31 can be prevented from being damaged.

  Further, when the elastic member 27 is made of urethane rubber, electrical noise can be cut off, so that the S (signal) / N (noise) ratio is improved and the measurement accuracy is improved. Can do. The elastic member 27 is preferably made of natural rubber. In this case, the noise blocking property can be further improved.

  The rubber hardness of the elastic member 27 is preferably set from 70 ° to 100 °. In this case, resonance at a low frequency (about 500 Hz or less) can be attenuated. Furthermore, it is preferable to set to 90 ° ± 5 °. In this case, resonance at a low frequency (about 500 Hz or less) can be further attenuated.

  Further, as shown in FIG. 4A, the pair of elastic members 27 is sandwiched between the box member 21 and the lid member 22 and compressed while sandwiching a servo-type sensor 31 described later. Therefore, the amount of pre-compression of the elastic member 27 can be adjusted by sandwiching the spacer member 26 described above between the box member 21 and the lid member 22.

  As shown in FIGS. 4A and 4B, the sensor member 9 includes a servo type sensor 31, a vertical distortion type sensor 32, a left / right distortion type sensor 33, and a power line 35. The servo-type sensor 31 is an acceleration sensor that measures acceleration in the vertical direction (FIG. 4 (a) vertical direction) of the railway vehicle 100 (see FIG. 1). As shown in FIG. It is pinched and disposed at the center of the recess 21a (intersection of the virtual straight line L1 and the virtual straight line L2).

  That is, in the first embodiment, two sensors (servo type sensor 31 and vertical distortion type sensor 32) for measuring the acceleration in the vertical direction (FIG. 4 (a) vertical direction) of the railway vehicle 100 are provided. By comparing each output signal, an abnormal output signal can be determined. Therefore, a sensor failure can be determined.

  Since the output signals of the servo type sensor 31 and the vertical distortion type sensor 32 are compared with each other, when the output signal is recorded as time series data in a recording device (not shown), the servo type sensor 31 or the vertical type sensor 31 It can be determined from which point in time the abnormality has occurred in which side of the strain sensor 32.

  Therefore, it is possible to improve the measurement accuracy of the measuring apparatus by not using the output signal of the sensor on the side where the abnormality has occurred and the output signal after the abnormality has occurred in analyzing the state of the rail R. .

  In addition, the servo type sensor 31 uses a sensor having a small acceleration resolution that can be measured in order to perform highly accurate acceleration measurement. Therefore, the measurement range of acceleration is narrow because the resolution is small (the measurement range of ± 15 G compared to the acceleration generated by the axle box 4 is about ± 50 G).

  The vertical strain type sensor 32 is an acceleration sensor that measures acceleration in the vertical direction (FIG. 4A, vertical direction) of the railway vehicle 100 (see FIG. 1). As shown in FIG. It is arranged on the virtual straight line L1 and on one end side (left side in FIG. 4A) of the servo sensor 31.

  In addition, since the vertical distortion type sensor 32 has a lower acceleration resolution than the servo type sensor 31, the vertical distortion type sensor 32 has a wider measurement range than the servo type sensor 31 (shaft box 4). Measured range of ± 100G, while the acceleration generated is about ± 50G).

  The left-right distortion type sensor 33 is an acceleration sensor that measures acceleration in the left-right direction (FIG. 4A, left-right direction) of the railway vehicle 100. As shown in FIG. In addition, the servo sensor 31 is disposed on the other end side (the right side in FIG. 4A).

  The vertical distortion type sensor 32 and the horizontal distortion type sensor 33 are different in the mounting direction of the same type of acceleration sensor, and the arrangement distance from the servo type sensor 31 is the same. Further, since the vertical distortion type sensor 32 and the horizontal distortion type sensor 33 are different in detection method from the servo type sensor 31, the accuracy of measurement is inferior to that of the servo type sensor 31 but is smaller than the servo type sensor 31.

  That is, as shown in FIG. 4B, the arrangement positions of the servo type sensor 31, the vertical distortion type sensor 32, and the left and right distortion type sensor 33 are a pair in a plan view (see FIG. 4B). The imaginary straight line L1 formed by connecting the sensor fixing members 8a and the imaginary straight line L2 orthogonal to the imaginary straight line L1 and passing through the intermediate point of the pair of sensor fixing members 8a are symmetrically configured. Yes. Accordingly, the resonance of the box member 21 and the lid member 22 can be suppressed, and the measurement accuracy of the servo type sensor 31, the vertical distortion type sensor 32, and the horizontal distortion type sensor 33 can be ensured.

  In addition, since the vertical distortion type sensor 32 and the horizontal distortion type sensor 33 that are smaller than the servo type sensor 31 are disposed on both sides of the servo type sensor 31, the servo type sensor 31 and the vertical type sensor 33 are disposed between the pair of sensor fixing members 8a. The strain type sensor 32 and the left / right strain type sensor 33 can be arranged linearly.

  Furthermore, since the vertical distortion sensor 32 and the horizontal distortion sensor 33 have the same weight, they are also configured to contrast with the virtual straight line L2 in terms of weight. Accordingly, the resonance of the box member 21 and the lid member 22 can be suppressed, and the measurement accuracy of the servo type sensor 31, the vertical distortion type sensor 32, and the horizontal distortion type sensor 33 can be ensured.

  As described above, the servo-type sensor 31 is set to have a narrow acceleration measurement range (a measurement range of ± 15 G compared to an acceleration generated by the axle box 4 of about ± 50 G), and deviates from ± 15 G. The servo type sensor 31 has a problem that the measurement accuracy is not secured.

  On the other hand, in the first embodiment, since the vertical distortion type sensor 32 having a wider measurement range than the servo type sensor 31 is provided, the servo type sensor 31 is used in the region where the acceleration is ± 15 G to provide high accuracy. In the region where the acceleration deviates from ± 15 G, the measurement range can be expanded to ± 100 G.

  Further, since the left / right distortion type sensor 33 and the vertical distortion type sensor 32 are arranged at symmetrical positions with the virtual straight line L2 in between, the arrangement of the vertical distortion type sensor 32 and the left / right distortion type sensor 33 with respect to the virtual straight line L2 is arranged. The acceleration in the left-right direction (FIG. 4 (b) vertical direction) of the railway vehicle 100 (see FIG. 1) can be measured with the control as a control.

  That is, since the same type of sensors are arranged in different directions, the vertical direction of the railway vehicle 100 (see FIG. 1) is maintained while suppressing the resonance of the box 20 and ensuring the measurement accuracy of the measuring device 5 (see FIG. 4). It is possible to measure acceleration in the left-right direction (FIG. 4B, up-down direction), which is a different direction from (b) the direction perpendicular to the paper surface.

  Therefore, by comparing the measurement result of the railcar 100 (see FIG. 1) in the left-right direction (FIG. 4 (b) vertical direction) and the measurement result in the vertical direction (FIG. 4 (b) vertical direction on the paper), the vertical direction It is possible to determine whether or not the acceleration measurement result is an abnormal value with high accuracy.

  The power line 35 is a member that supplies power to the servo type sensor 31, the vertical distortion type sensor 32, and the horizontal distortion type sensor 33, and transmits an electrical signal that is a measurement result of acceleration to the recording apparatus. (Upper side).

  Next, a second embodiment will be described with reference to FIG. Fig.5 (a) is a side view of the measuring apparatus 205 attached to the axle box 4 in 2nd Embodiment, FIG.5 (b) is 2nd seen from the arrow Vb direction of Fig.5 (a). It is a bottom view of measuring device 205 in an embodiment. FIG. 5B corresponds to FIG. 3 in the first embodiment.

  Although 1st Embodiment demonstrated the case where the power line holding member 7 was fixed to the reinforcement part 4a facing the reinforcement part 4a located in the wheel 3 side (FIG. 3 lower side) by the 4th fixing member 8b ( In the second embodiment, the power line holding member 207 is fixed by the fourth fixing member 208b that fixes the cover 204b of the axle box 4 in the second embodiment.

  As shown in FIG. 5A, the measuring device 205 according to the second embodiment includes a measuring member 6 and a power line holding member 207. As shown in FIG. 5 (b), the measuring member 6 is fixed by a sensor fixing member 8a to a reinforcing portion 4a facing the reinforcing portion 4a located on the wheel 3 side (upper side of FIG. 6 (b)). As shown in FIG. 5A, the power line holding member 207 is fastened together with the cover 204b by a fourth fixing member 208b that fixes the cover 204b of the axle box 4.

  Therefore, in the first embodiment, the fourth fixing member 8b for fixing the power line holding member 7 is necessary, but in the second embodiment, the fourth fixing member 208b fixing the cover 204b is used. Since the cover 204b and the power line holding member 207 are fixed together, the fourth fixing member 8b can be omitted. Therefore, since the fourth fixing member 8b can be omitted, the measurement device 5 can be reduced in weight.

  Further, the power line 35 is connected to a recording device (not shown) that extends on the spring 2 side (upper side in FIG. 5A) and is disposed inside the structure 10 (see FIG. 2). Therefore, the size of the power line 35 can be reduced by holding the power line 35 with a member attached to the spring 2 side rather than the measuring member 6.

  Therefore, a member for fixing the power line 35 is disposed on the cover 204b rather than a member for fixing the power line 35 on the reinforcing portion 4a disposed at a position away from the spring 2 from the cover 204b. The member can be reduced in size.

  Here, in the second embodiment, since the cover 204b and the power line holding member 207 are fixed together by the fourth fixing member 208b fixing the cover 204b, the power line holding member of the first embodiment is fixed. Compared with FIG. 7, the power line holding member 207 can be downsized. Therefore, the weight of the measuring device 5 can be reduced by the size reduction.

  Next, a third embodiment will be described with reference to FIG. FIG. 6A is a side view of the measuring device 305 attached to the axle box 4 in the third embodiment, and FIG. 6B is a third view seen from the direction of the arrow VIb in FIG. It is a bottom view of measuring device 305 in an embodiment. FIG. 6B corresponds to FIG. 3 in the first embodiment.

  In 1st Embodiment, although the case where the power line holding member 7 for hold | maintaining the power line 35 and the 4th fixing member 8b for fixing the power line holding member 7 were provided was demonstrated, in 3rd Embodiment, The power line 35 is held by the lid member 322 of the box 320.

  As shown in FIG. 6B, the measuring member 305 has the lid member 322 holding the power line 35. Therefore, since the power line holding member 7 and the fourth fixing member 8b are omitted, the weight of the measuring device 5 can be reduced accordingly.

  Next, a fourth embodiment will be described with reference to FIG. FIG. 7A is a bottom view of the measuring device 405 in the fourth embodiment, and corresponds to FIG. 3 in the first embodiment.

  In the first embodiment, the measuring member 6 is fixed to one reinforcing portion 4a of the pair of reinforcing portions 4a by the sensor fixing member 8a, and the power line holding member 7 is fixed to the other reinforcing portion 4a by the sensor fixing member 8a. In the fourth embodiment, the measurement member 406 is fixed to both the pair of reinforcing portions 4a via the sensor fixing member 8a.

  The box 420 of the measuring member 406 includes four through holes (not shown). As shown in FIG. 7A, the sensor fixing member 8a is inserted into the through holes, and the pair of reinforcing portions 4a are provided. Fixed. Therefore, since the rigidity of the box 420 can be improved, the resonance of the box 420 can be suppressed and the measurement accuracy of the sensor member 9 described later can be ensured.

  In addition, the box 420 is configured in a substantially rectangular shape in plan view and is configured in a symmetric shape with respect to the virtual straight line L401. Therefore, the resonance of the box 420 can be suppressed and the measurement accuracy of the sensor member 9 described later can be ensured.

  The virtual straight line L401 is equally composed of two sensor fixing members 8a that fix the measuring member 406 to one reinforcing portion 4a and two sensor fixing members 8a that fix the measuring member 406 to the other reinforcing portion 4a. The distance between the two sensor fixing members 8a for fixing the measuring member 406 to one of the reinforcing portions 4a is parallel to the direction (FIG. 7 (a) left-right direction).

  The sensor member 9 accommodated in the space S (not shown) of the box 420 is disposed on the virtual straight line L401. Therefore, it arrange | positions symmetrically with respect to the virtual straight line L401. Therefore, the resonance of the box 420 can be suppressed and the measurement accuracy of the sensor member 9 described later can be ensured.

  Next, a fifth embodiment will be described with reference to FIG. FIG. 7B is a bottom view of the measuring apparatus 505 in the fifth embodiment, and corresponds to FIG. 7A in the fourth embodiment (FIG. 3 in the first embodiment).

  In the fourth embodiment, the case has been described in which the box 420 is configured on a substantially planar view rectangle and is configured to be symmetric with respect to the virtual straight line L401. In the fifth embodiment, the box 520 is It is configured in a U shape in plan view.

  In this case, a tool insertion path to the drain bolt B, an attachment / detachment path for the drain bolt B, and an oil are provided by disposing a recessed portion of the box 520 having a U-shape in plan view directly below the drain bolt B. The discharge flow path can be secured. Therefore, oil can be exchanged with the box 520 attached.

  Next, a sixth embodiment will be described with reference to FIG. FIG.7 (c) is a bottom view of the measuring apparatus 605 in 6th Embodiment, and respond | corresponds to Fig.7 (a) in 4th Embodiment (FIG. 3 in 1st Embodiment).

  In the fourth embodiment, the case has been described in which the box 420 is configured in a substantially rectangular shape in plan view and is configured in a symmetric shape with respect to the virtual straight line L401. In the sixth embodiment, the box 520 is It is configured in a ring shape with a rectangular shape in plan view.

  In this case, a tool insertion path to the drain bolt B and a drain bolt B attachment / detachment path are provided immediately below the drain bolt B by arranging a hole portion of the box 520 configured in a ring shape having a rectangular shape in plan view. In addition, an oil discharge channel can be secured. Therefore, oil can be exchanged with the box 520 attached.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. Can be easily guessed.

  For example, the numerical values (for example, the number and size of each component) given in the above embodiments are merely examples, and other numerical values can naturally be adopted.

  Moreover, you may form the box member 21 of said each embodiment by shaving. For example, when the box member 21 is formed of sheet metal, the rigidity of the box member 21 is reduced by the amount of deformation of the material. On the other hand, since the material is not deformed when the box member 21 is formed by cutting, the rigidity of the box member 21 can be increased. Therefore, the resonance frequency of the box 20 can be shifted to the high frequency side. As a result, the measurement accuracy of the measuring device 5 can be improved.

  Note that the measuring device 5 of the first embodiment and the measuring device 205 of the second embodiment are configured such that the power line holding members 7 and 207 are configured as separate members from the measuring devices 5 and 205. Compared with the measuring device 305 of the embodiment, the vibration of the power line 35 can be reduced from being transmitted to the servo sensor 31, the vertical distortion sensor 32, and the horizontal distortion sensor 33.

Moreover, since the measuring apparatus 5 of 1st Embodiment and the measuring apparatus 205 of 2nd Embodiment are fastened by one reinforcement part 4a of a pair of reinforcement parts 4a, both of a pair of reinforcement parts 4a As compared with the measurement device 405 of the fourth embodiment, the measurement device 505 of the fifth embodiment, and the measurement device 605 of the sixth embodiment, which are fastened to the resonance, it is possible to prevent resonance, so that the measurement accuracy is improved. Can be secured. That is, the measuring device 5 of the first embodiment and the measuring device 205 of the second embodiment are the most preferred embodiments.
<Others>
The measuring device described in the technical idea 1 is used for a railway vehicle whose wheels are pivotally supported by a axle box, and detects the state of the rail on which the wheels roll by measuring the acceleration of the axle box. A first virtual straight line that is a predetermined virtual straight line in a plan view, and includes a box member having a concave part and a lid member that is disposed on the opening side of the concave part and forms a space between the concave part by closing the concave part A box that is configured symmetrically with respect to each of the second virtual lines that are virtual lines orthogonal to the first virtual line, a sensor member that is accommodated in the space and measures the acceleration of the axial box, and a box A first fixing member and a second fixing member that are fixed to the rail side of the axle box, and in a state in which the box is fixed to the rail side of the axle box, the first fixing member and the second fixing member are in plan view. A first fixing member disposed on the first imaginary straight line With an intermediate position between the second fixing member overlap to the second virtual straight line, the sensor member is disposed in the first a virtual straight line and the second imaginary straight line.
The measuring apparatus described in the technical idea 2 is the measuring apparatus described in the technical idea 1, wherein the box is an elastic member disposed between the sensor member and the lid member and between the sensor member and the box member. The sensor member is held by the elastic member in a state where the lid member is in close contact with the opening side of the box member.
The measuring device described in the technical idea 3 is the measuring device described in the technical idea 2, wherein the box includes a spacer member configured in a substantially flat plate shape, and the spacer member is sandwiched between the lid member and the box member, The pre-compression amount of the elastic member is adjusted by adjusting the distance between the concave portion and the lid member of the box member.
The measuring device described in the technical idea 4 is the measuring device described in the technical idea 3, and the box includes a third fixing member that fixes the lid member, the box member, and the spacer member.
The measuring device according to the technical idea 5 is the measuring device according to any one of the technical ideas 1 to 4, wherein a power line holding member to which a power line for supplying power to the sensor member is fixed, and the power line holding member as a shaft box The power line holding member is configured as a separate member from the box.
The measuring device according to the technical idea 6 is the measuring device according to any one of the technical ideas 1 to 5, wherein the sensor member is smaller than the first sensor member for measuring the acceleration of the axle box and the first sensor. The first sensor member is disposed on the first virtual line and the second virtual line, and the second sensor is disposed on the first virtual line in plan view. Thus, they are arranged symmetrically with respect to the first virtual straight line.
The railway vehicle described in the technical idea 7 is attached with the measuring device described in any of the technical ideas 1 to 6.
<Effect>
According to the measuring device described in the technical idea 1, the wheel is rolled on the rail, so that the axle box is vibrated, and the acceleration of the vibrated axle box is measured by the sensor member. Here, in the conventional measuring apparatus, since the box is fixed to the rail-side surface of the axle box, the operator can use the space between the rail and the axle box for attaching / detaching the box, While there is an effect that the box can be easily attached and detached, there is a problem that the measurement accuracy is deteriorated because the fixed position is separated from the axle box.
On the other hand, in the present invention, the box and the sensor member are symmetrical with respect to the first virtual line and the second virtual line. Therefore, since the resonance of the box can be suppressed and the measurement accuracy of the measurement device can be ensured, it is possible to achieve both easy attachment and detachment and ensuring the measurement accuracy. That is, there is an effect that the attachment / detachment is easy and the measurement accuracy can be secured.
According to the measuring device described in the technical idea 2, in addition to the effect exhibited by the measuring device described in the technical idea 1, since the sensor member is held by the elastic member, the low frequency (about approximately) transmitted from the axle box to the sensor member. 100 Hz or less) can be attenuated by the elastic force of the elastic member. That is, since the acceleration at a low frequency (about 100 Hz or less) is noise (unnecessary signal) in measuring the rail state, the S (signal) / N (noise) ratio is reduced by attenuating the noise. As a result, the measurement accuracy can be improved.
Further, since the elastic member is pre-compressed between the lid member and the box member, the elastic force of the elastic member acts as a pressing force on the lid member and the box member. Therefore, the vibration of the lid member and the box member can be suppressed, and the resonance of the lid member and the box member can be suppressed. Therefore, there is an effect that measurement accuracy can be improved.
In addition, the sensor member can be fixed by disposing the elastic member between the lid member and the sensor member and between the box member and the sensor member. Therefore, compared with the case where the sensor member is fixed inside the box using another member, the box can be reduced in size because it is not necessary to house the other member inside the box. effective.
Further, since the elastic member is pre-compressed between the lid member and the box member, the strength of vibration transmitted from the axle box to the sensor member can be attenuated by the elastic force of the elastic member. Therefore, the sensor member can be prevented from being damaged.
In addition, when the elastic member is made of rubber (having insulating properties), electrical noise can be cut off, so the S (signal) / N (noise) ratio is improved and the measurement accuracy is improved. There is an effect that it is possible to improve.
According to the measuring device described in the technical idea 3, in addition to the effect exhibited by the measuring device described in the technical idea 2, the spacer member is disposed between the box member and the lid member, so that the concave portion of the box member and its Since the pre-compression amount of the elastic member can be adjusted by adjusting the distance from the side surface of the lid member facing the recess, the variation in the pre-compression amount of the elastic member due to the dimensional tolerance of the box member and the lid member is adjusted Can do.
Therefore, it is possible to suppress variations in the amount of pre-compression among a plurality of measuring devices. Accordingly, since the degree of occurrence of resonance (suppression of low frequencies) of a plurality of measuring devices can be kept uniform, there is an effect that the measurement accuracy can be improved.
In addition, since the precompression amount of the elastic member can be adjusted by adjusting the distance between the concave portion of the box member and the side surface of the lid member facing the concave portion, the precompression amount of the elastic member is set for each vehicle to be attached. Can be changed.
For example, business vehicles have various vehicle forms (vehicles with cabins only, vehicles with toilets, vehicles equipped with drive motors, etc.). Therefore, the frequency of vibration transmitted to the measuring device (vibration frequency from the equipment or resonance frequency of the structure) differs depending on the vehicle form. These vibrations are classified as noise, not vibrations indicating the state of the rail.
On the other hand, in the present invention, since the setting of the precompression amount of the elastic member can be changed for each mounted vehicle, the vibration (noise) transmitted from the vehicle body is changed by changing the frequency attenuated by the elastic member. Can be attenuated accurately. Therefore, there is an effect that it is possible to improve the measurement accuracy by improving the S (signal) / N (noise) ratio.
For example, when the distance between the concave portion of the box member and the side surface of the lid member facing the concave portion is adjusted by the screwing amount of the bolt, the concave portion of the box member and the side surface of the lid member facing the concave portion While the distance can be adjusted steplessly, the operator has to adjust the amount of screwing, resulting in a problem that the adjustment work takes time.
In contrast, in the present invention, the distance between the concave portion of the box member and the side surface of the lid member facing the concave portion is adjusted by sandwiching the spacer member between the box member and the lid member. The distance can be adjusted step by step depending on the number of sheets. Therefore, there is an effect that adjustment work can be facilitated.
According to the measuring device described in the technical idea 4, in addition to the effect produced by the measuring device described in any of the technical ideas 1 to 3, the box includes the third fixing member that fastens the lid member and the box member. Therefore, the operation of assembling the lid member and the box member into the box body and the operation of attaching the box body to the axle box can be performed separately.
Here, in the present invention, since the precompression amount of the elastic member can be adjusted without being attached to the axle box, the operator can concentrate on adjusting the precompression amount of the elastic member. As a result, there is an effect that the adjustment work of the precompression amount of the elastic member can be reliably performed.
Further, since the box body whose precompression amount has been adjusted can be attached to the axle box, the operator can concentrate on the work of attaching the box body to the axle box. Therefore, there is an effect that the mounting operation can be performed reliably. That is, by dividing the work, there is an effect that the certainty of the work performed by the worker can be improved.
Further, since the adjustment work of the precompression amount and the work of attaching the box body to the axle box can be performed separately, the adjustment work of the precompression amount of the plurality of box bodies can be collectively performed at one place. Therefore, there is an effect that it is possible to improve the efficiency of adjusting the precompression amount.
According to the measuring device described in the technical idea 5, in addition to the effect exhibited by the measuring device described in any of the technical ideas 1 to 4, a power line holding member to which a power line for supplying power to the sensor member is fixed, and Since the fourth fixing member for fixing the power line holding member to the shaft box is provided and the power line holding member is configured as a separate member from the box body, there is an effect that the measurement accuracy of the measuring apparatus can be ensured.
For example, when fixing a power line, it is necessary to form a part for fixing the power line in a box. In many cases, the portion for fixing the power line is formed in a long shape in order to suppress an increase in the weight of the box. Therefore, the part for fixing the power line is likely to resonate. Therefore, there is a problem that the resonance of the part for fixing the power line is transmitted to the box and the measurement accuracy of the measuring device is deteriorated.
On the other hand, in the present invention, the power line is fixed by the power line holding member, which is a separate member from the box, so that the vibration generated by the shake of the power line is suppressed from being transmitted to the box, and the resonance of the box is reduced. Generation can be reduced. Therefore, there is an effect that measurement accuracy can be ensured.
According to the measuring device described in the technical idea 6, in addition to the effect exhibited by the measuring device described in any of the technical ideas 1 to 5, the first sensor member and the second sensor member are arranged on the first virtual straight line. As a result, it is arranged symmetrically with respect to the first imaginary straight line, so that there is an effect that the resonance can be suppressed and the measurement accuracy can be improved.
According to the railway vehicle described in the technical idea 7, an effect equivalent to that of the measuring device described in any of the technical ideas 1 to 6 can be obtained.

1 is a side view of a railway vehicle to which a measuring device according to a first embodiment of the present invention is attached. It is a side view of the measuring apparatus attached to the axle box. FIG. 3 is a bottom view of the measuring apparatus viewed from the direction of arrow III in FIG. 2. (A) is sectional drawing of a measuring member, (b) is sectional drawing of the measuring member in the IIIb-IIIb line | wire of Fig.4 (a). (A) is a side view of the measuring apparatus attached to the axle box in 2nd Embodiment, FIG.5 (b) is in 2nd Embodiment seen from the arrow Vb direction of Fig.5 (a). It is a bottom view of a measuring device. (A) is a side view of the measuring apparatus attached to the axle box in 3rd Embodiment, FIG.6 (b) is in 3rd Embodiment seen from the arrow VIb direction of Fig.6 (a). It is a bottom view of a measuring device. (A) is a bottom view of the measuring device in 4th Embodiment, (b) is a bottom view of the measuring device in 5th Embodiment, (c) is a measurement in 6th Embodiment. It is a bottom view of an apparatus.

100 Rail vehicles (Rail vehicles)
10 structure 3 wheel 4 axle box 4a reinforcement part (part of axle box)
5,205,305,405,505,605 Measuring device 6,406,506,606 Measuring member 7 Power line holding member 8 Fixing member 8a Sensor fixing member (first fixing member or second fixing member)
8b, 208b Fourth fixing member 8c Third fixing member 20, 220, 320, 420, 520, 620 Box 21, 21, 421, 521, 621 Box member 21a Recess 22, 322 Lid member 27 Elastic member 9 Sensor member 31 Servo type sensor (first sensor member)
32 Vertical strain sensor (part of second sensor member)
33 Left / right distortion type sensor (part of second sensor member)
35 Power line R Rail S Space L1, L401 First virtual straight line L2 Second virtual straight line

Claims (6)

In a measuring device for detecting a state of a rail on which the wheel rolls by measuring an acceleration of the axle box, which is used for a railway vehicle having wheels supported by the axle box,
A first imaginary line that includes a box member having a recess and a lid member that is disposed on the opening side of the recess and forms a space between the recess by closing the recess and is a predetermined virtual straight line in plan view. A box configured symmetrically with respect to each of the straight line and the second virtual line that is a virtual line orthogonal to the first virtual line;
A sensor member housed in the space and measuring the acceleration of the axle box;
A first fixing member and a second fixing member for fixing the box to the rail side of the axle box;
In the state where the box is fixed to the rail side of the axle box, in the plan view,
The first fixing member and the second fixing member are disposed on the first imaginary straight line, an intermediate position between the first fixing member and the second fixing member overlaps the second imaginary straight line, and the sensor member Is disposed on the first imaginary straight line and on the second imaginary straight line ,
The box includes an elastic member disposed between the sensor member and the lid member, and between the sensor member and the box member,
The elastic member measuring device according to claim Rukoto sensor member is held by the state in which the lid member is in close contact with the open side of the box member. The box includes a spacer member configured in a substantially flat plate shape,
Sandwiching the spacer member between the lid member and a box member, by adjusting the concave portion and the lid member and spacing of the box member, according to claim 1, wherein adjusting the pre-compression amount of the elastic member Measuring device. The measuring apparatus according to claim 2 , wherein the box includes a third fixing member that fixes the lid member, the box member, and the spacer member. A power line holding member to which a power line for supplying power to the sensor member is fixed;
A fourth fixing member for fixing the power line holding member to the axle box;
Measurement apparatus according to any one of claims 1 to 3, characterized in that the power line retaining member is formed as the box body and another member. The sensor member
A first sensor member for measuring the acceleration of the axle box;
A second sensor member configured to be smaller than the first sensor,
In the plan view, the first sensor member is disposed on the first virtual line and the second virtual line,
Measurements according to any one of claims 1 to 4, wherein the second sensor is Haise' symmetrically with respect to the first imaginary straight line by being disposed on the first virtual straight line apparatus. A railway vehicle to which the measuring device according to any one of claims 1 to 5 is attached.

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