JP5373345B2 - Basic brake device pressing force detection device, basic brake efficiency calculation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology for detecting a pressing force of a foundation brake device, without detaching a brake shoe and without the need for preparing attachment for each wheel shape. <P>SOLUTION: The support plate 120 of a device 100 for detecting a pressing force is formed in a curved thin plate shape, and a load cell 110 is embedded in one surface thereof. The thickness dimension, including the load cell 110, is configured to be smaller than that of the gap size between a brake shoe 8 and a wheel 10 at the time of non-pressing action. The load cell 110 can be supported between the brake shoe 8 and the wheel 10, when the support plate 120 is disposed between the brake shoe 8 and the wheel 10 along the circumferential direction of the wheel 10. The load cell 110 can detect the pressing force of the brake shoe 8 to the wheel 10, when the load cell is disposed between the brake shoe 8 and the wheel 10. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a technique for detecting a pressing force applied to a wheel of a restrictor connected to a push rod of a brake cylinder via a basic brake device.

  Conventionally, a railway vehicle or the like is equipped with a basic brake device that generates a braking force by receiving compressed air from a brake cylinder and pressing a control member against a wheel tread. This basic brake device is composed of a connecting portion with a brake cylinder and a brake, a lever mechanism, and the like, and amplifies the output of the brake cylinder and transmits it to the brake. Further, in recent railway vehicles, a unit brake device in which the basic brake device, the brake cylinder, and the control device are integrated is mounted from the viewpoint of ease of assembly and maintenance on the vehicle.

  As shown in FIG. 7 (a), this unit brake device includes a case 2 fixed to a carriage lateral beam 1 with a bracket not shown in the figure, and a brake that is disposed at the top of the case 2 and houses a return spring 3a therein. A cylinder 3, a connecting rod 5 rotatably connected to a push rod 4 of the brake cylinder 3 via a pin 5a, and a vicinity of the lower end rotatably supported by the case 2 by a pin 5b, and a screw hole 6a A spherical bearing 6 rotatably engaged with the lower end of the connecting rod 5, a suspension member 7b suspended from the bracket via a pin 7a, and the suspension member. A brake head 7 integrally connected to the lower end of 7b, a brake 8 fixed to the lower portion of the brake head 7, and a tip 9a that is pivotally connected to the brake head 7 with a pin 9a. For adjusting the clearance by screwing the threaded portion 9b into the threaded hole 6a of the spherical bearing 6 Flip the rod 9, it consists of.

  By the way, in the above-described basic brake device, the vehicle is based on the necessary deceleration calculated by the vehicle specifications such as the maximum stop distance and the maximum use speed and the friction coefficient of the friction material used in the vehicle design and production stage. The one that generates the pressing force suitable for is selected and installed. Therefore, in each basic brake device, if the pressing force output with respect to the brake cylinder pressure is grasped in advance, the optimum one corresponding to the vehicle to be applied can be selected.

  As a method for detecting the pressing force of such a basic brake device, for example, a method disclosed in Patent Document 1 can be cited. That is, first, as illustrated in FIG. 7A, a pressure measuring means including a pressure sensor (not shown) is attached to the brake cylinder 3. Then, instead of the control member 8, as illustrated in FIG. 7B, two compression-type load cells 11, which are load measuring means, are rotated on the side of the wheel 10 facing the tread surface 10 a. The test brake element 12 attached with an interval in the direction is incorporated in the unit brake device A, and the two load cells 11 are connected to the load measuring device 13, respectively.

In addition, since the wheel is not a simple cylindrical shape but a complex conical shape in order to adapt to the vehicle use line section, it is necessary to prepare the test restrictor 12 for each wheel shape.
On the other hand, a strain gauge 14 which is a strain amount measuring means is attached to the central portion of the brake head 7 which is a constituent member of the basic brake device of the unit brake device A, and temperature compensation, Young's modulus compensation and the like are attached to the strain gauge 14. The bridge box 15 having a built-in bridge circuit is connected to the amplifying device 16 having a built-in A / D converter. Further, the pressure sensor and the amplifying device 16 are connected to an arithmetic processing unit 17 such as a microcomputer.

  Subsequently, when the vehicle is stationary, compressed air is supplied to the brake cylinder 3 via the input port 3b, and the load buttons 11a of the two load cells 11 are pressed against the treads 10a of the stationary wheels 10, respectively. As a result, the pressing force of the test restrictor 12 against the wheel 10 is displayed on the load measuring device 13 as an average value of the load applied to the two load cells 11, and simultaneously provided to the brake cylinder pressure 3. The brake cylinder pressure is measured by the pressure sensor.

  In addition, when the control brake head 12 is pressed against the wheel 10 and the brake head 7 is distorted, the electrical resistance of the strain gauge 14 changes, so that the current flowing through the strain gauge 14 changes. It is converted into a digital electric signal through the bridge box 15 and the amplifying device 16, and is converted into a digital electric signal together with the measurement data of the brake cylinder pressure and the pressing force of the test brake 12 against the wheel 10. Store in RAM.

  In this case, the set pressure of the compressed air supplied to the brake cylinder 3 is increased or decreased step by step, and the brake cylinder pressure, the pressing force of the test brake 12 against the wheel 10 and the control force are set for each set pressure. The distortion amount of the rotator head 7 is measured.

  Next, after removing the test brake 12 and re-installing the brake 8 in the unit brake device A, the vehicle is run, and compressed air is supplied to the brake cylinder 3 in the same manner as described above. The brake cylinder pressure at this time is measured, and the amount of distortion of the brake head 7 when the brake 8 is pressed against the wheel 10 is measured, and these measurement data are stored in the RAM of the arithmetic processing unit 17. Let Also in this case, the set pressure of the compressed air supplied to the brake cylinder 3 is increased or decreased stepwise so as to have the same value as described above, and the brake cylinder pressure and the distortion of the brake head 7 are set for each set pressure. Try to measure the quantity.

Finally, on the basis of the correlation between the measurement data stored in the RAM of the arithmetic processing unit 17, the pressing force of the control wheel 8 against the wheel 10 when the vehicle travels is supplied to the brake cylinder 3. Calculate for each set pressure of compressed air. Specifically, the ratio between the pressing force of the pressure restrictor 8 on the wheel 10 and the amount of distortion of the restrictor 8 when the vehicle is stationary is calculated, and this ratio is calculated by the restrictor 8 when the vehicle travels. Multiply the value of the distortion amount of the brake head 7 when pressed against the wheel 10 and repeat the above calculation process for each set pressure of compressed air supplied to the brake cylinder 3 (for example, Patent Document 1).
Japanese Patent Laid-Open No. 08-178773 (pages 3-4, FIGS. 1-2)

  However, in the method of detecting the pressing force of the basic brake device as described above, the control brake is removed and the test brake 12 with the load cell 11 attached is incorporated into the unit brake device A to detect the pressing force of the basic brake. Then, after that, it is necessary to perform a series of operations for adjusting the brake stroke and reattaching the brake restrictor 8 every time, and there is a problem that a great amount of time and labor are required.

  In addition, since the wheel 10 is not a simple cylindrical shape but has a complex conical shape in order to adapt to the vehicle use line, there is a state in which the wheel does not contact the sensor pressure-sensitive part. It was necessary to prepare an attachment (test control wheel 12).

  The present invention has been made in view of such problems, and the object of the present invention is to eliminate the need to prepare an attachment for each wheel shape, and to reduce the pressing force of the basic brake device without removing the restrictor. It is to provide a technique for detecting.

A pressing force detecting device for a basic brake device according to claim 1, which has been made to solve the above-mentioned problem, can detect the pressing force applied to a wheel of a control wheel connected to a push rod of a brake cylinder via a basic brake device. A pressing force detection device for a basic brake device, wherein a thickness dimension is configured to be smaller than a clearance dimension between the wheel restrictor and the wheel during a non-pressing operation, and is disposed between the wheel restrictor and the wheel. A pressing force detection unit capable of detecting the pressing force of the brake against the wheel, and a curved thin plate, and the pressing force detection unit is embedded in one surface of the pressing force detection unit. The control plate includes a support plate having a thickness dimension that is smaller than a clearance size between the control wheel and the wheel during non-pressing operation, and the control plate and the wheel are arranged so that the support plate is along a circumferential direction of the wheel. When placed between A detection unit and a supporting portion capable of supporting between the wheel and the braking Waco, the supporting part during the support plate of the system Waco and the wheel along the circumferential direction of the wheel when disposed, characterized Rukoto that having a positioning portion for determining a position of the pressing force detector with respect to the system Waco by contact with said wheels.

  According to the pressing force detection device of the basic brake device of the present invention configured as described above, the support plate of the support portion is formed in a curved thin plate shape, and the pressing force detection portion is embedded in one surface thereof, thereby detecting the pressing force. The thickness dimension including the portion is configured to be smaller than the gap dimension between the control wheel and the wheel during the non-pressing operation. And when a support part is arrange | positioned between a restrictor and a wheel so that a support plate may follow the circumferential direction of a wheel, it can support a pressing force detection part between a restrictor and a wheel. Moreover, the above-mentioned pressing force detection part can detect the pressing force to the wheel of a restrictor, when it arrange | positions between a restrictor and a wheel.

Therefore, it is possible to detect the pressing force of the restrictor by sandwiching the pressing force detector in the gap between the wheel and the restrictor without removing the restrictor. Further, there is no need to adjust the stroke when remounting the removed control as in the prior art, and the pressing force can be detected efficiently in this respect. Also, the support plate is formed in a curved thin plate shape, and the support plate is deformed and the pressing force detection unit contacts the periphery of the wheel during the pressing operation of the brake, so that the pressing force of the basic brake device can be detected reliably. And there is no need to prepare an attachment for each wheel shape.
Further, when the pressing force detection unit is disposed between the control wheel and the wheel, the positioning unit can easily determine the position of the pressing force detection unit with respect to the control wheel.

  In this case, it is preferable to arrange the pressing force detection unit so as to face the restrictor. Specifically, as in claim 2, the pressing force detection unit is embedded in a surface of the support plate that is disposed between the wheel restrictor and the wheel so as to be along the circumferential direction of the wheel. It is possible. If comprised in this way, when a support plate is arrange | positioned between a control plate and a wheel so that the circumferential direction of a wheel may be followed, the pressing force detection part embed | buried under the support plate of a support part will oppose a control device. And the surface on the opposite side to the surface where the pressing force detection part of a support plate is laid is facing a wheel. As a result, the pressing force detection unit directly contacts the control wheel during the pressing operation, so that the pressing force by the control element can be measured more accurately.

  In addition, about the support plate of a support part, it is possible to be comprised with a metal material (Claim 3) and a polymeric material (Claim 4). If comprised in this way, while a support plate deform | transforms according to the clearance gap between a control wheel and a wheel at the time of pressing operation, it can return to an original shape with the elasticity at the time of non-pressing operation of a control device.

  By the way, it is conceivable that there are a plurality of the pressing force detection units described above. If comprised in this way, the pressing force which acts on each pressing force detection part can be made small. Further, it is only necessary to select a pressing force detection unit with a small allowable pressing force, and the thickness dimension of the pressing force detection unit and the thickness dimension of the support plate including the pressing force detection unit can be further reduced. It becomes easy to install in the gap between the control wheel and the wheel.

  In this case, it is considered that the plurality of pressing force detection units described above are arranged along the circumferential direction of the wheel when the support plate is arranged between the control device and the wheel. It is done. If comprised in this way, since the pressing force by a control device will act equally on each pressing force detection part arrange | positioned along the circumferential direction of a wheel, the pressing force by a control device can be detected more correctly. .

  Further, as described in claim 7, when the support plate is disposed between the control device and the wheel, the plurality of pressing force detection units are disposed in two or more rows along the circumferential direction of the wheel. It is possible. With this configuration, the pressing force by the restrictor acts evenly on each row of the pressing force detectors arranged in two or more rows along the circumferential direction of the wheel. Can be detected.

  Further, as in claim 8, when the support plate is disposed between the control device and the wheel, the plurality of pressing force detection units are disposed along a direction having a predetermined angle with the circumferential direction of the wheel. It is thought that it is done. If comprised in this way, it will become easy to contact each pressing force detection part equally to the circumference | surroundings of the wheel which has a complicated composite cone shape, and the pressing force by a restrictor has a predetermined angle with the circumferential direction of a wheel. Since it acts equally on each row of the pressing force detectors arranged along the direction, it is possible to more accurately detect the pressing force by the restrictor.

Further , as in claim 9 , when the positioning portion of the support portion is disposed between the control wheel and the wheel so that the support plate is along the circumferential direction of the wheel, the positioning portion is disposed at a portion that contacts the wheel. It is conceivable to have a magnet. If comprised in this way, since a wheel is iron, a positioning part can be fixed to a wheel with a magnet, and a position does not shift easily.

Further, as in claim 10 , it is conceivable that the support portion has a rod-shaped gripping portion that can be gripped by an operator. If comprised in this way, it will become easy to perform the operation | work which arrange | positions a pressing force detection part between a control device and a wheel because an operator has a holding part.

In this case, with respect to the above-described gripping portion, one end portion is fixed to the support plate, and the support plate is disposed between the control wheel and the wheel so as to follow the circumferential direction of the wheel. It is conceivable that, when contacting, it is configured to move away from the rotating shaft of the wheel as it goes from one end to the other end (claim 11 ). If comprised in this way, when installing the pressing force detection apparatus of a basic brake apparatus, it will become difficult for the operator's hand holding a holding part to contact | abut to the structure of a trolley | bogie.

By the way, when the pressing force of the basic brake device is detected, the brake operation may not be sufficiently performed, and the accuracy of the calculated brake efficiency may be reduced.
A basic brake efficiency calculating device according to a twelfth aspect of the present invention, which has been made to solve such a problem, is capable of acquiring the pressing force detected by the pressing force detecting device according to any one of the first to eleventh aspects. An action force acquisition unit capable of acquiring an action force detected by an action force detection unit capable of detecting an action force acting on a push rod of the brake cylinder, and an action force detected by the action force detection unit. Based on a detection unit that detects a brake operation based on the pressing force acquired by the pressing force acquisition unit and the action force acquired by the action force acquisition unit when the brake operation is detected by the detection unit And a calculation unit for calculating brake efficiency.

  According to the basic braking efficiency calculation device of the present invention configured as described above, when the calculation unit detects a brake operation by the detection unit, the calculation unit acquires the pressing force and the acting force acquisition unit acquired by the pressing force acquisition unit. The basic brake efficiency is calculated based on the obtained acting force. Therefore, since the brake efficiency is calculated when the brake operation is performed, the accuracy of the calculation result can be increased. In addition, after the power is turned on, the brake efficiency can be calculated automatically only by performing a brake operation manually or by air pressure.

In this case, it is preferable to calculate the basic brake efficiency when the braking force is stable. Specifically, when the brake operation is detected by the detection unit as in the thirteenth aspect and the applied force detected by the applied force detection unit is stable, the calculation unit is configured to provide the pressing force acquisition unit. It is conceivable to calculate the basic brake efficiency based on the pressing force acquired by the above and the acting force obtained by the acting force obtaining unit. If comprised in this way, the calculation precision of basic brake efficiency can be raised.

Moreover, it is good to record the basic brake efficiency calculated by the calculation part. Specifically, it is conceivable to provide a recording unit for recording the basic brake efficiency calculated by the calculation unit as in the fourteenth aspect . If comprised in this way, the recorded content can be utilized by recording the calculated brake efficiency.

The basic brake efficiency calculating device as described above is preferably portable. Specifically, as in claim 15 , it is conceivable to include a storage unit capable of storing at least a pressing force acquisition unit, an action force acquisition unit, a detection unit, a calculation unit, and a recording unit. If comprised in this way, a basic brake efficiency calculation apparatus can be carried easily, for example, a basic brake efficiency calculation apparatus can be used also in places with bad environment, such as an inspection repair line.

Further, the basic brake efficiency calculated by the calculation unit may be displayed. Specifically, as in claim 16 , it is conceivable to include a display unit that displays the basic brake efficiency calculated by the calculation unit. If comprised in this way, an operator's convenience can be improved by calculating and displaying the calculated brake efficiency in real time.

Embodiments of the present invention will be described below with reference to the drawings.
[First embodiment]
FIG. 1 is an overall configuration diagram illustrating a pressing force detection device for a basic brake device according to a first embodiment.

[1. Explanation of configuration of pressing force detection device of basic brake device]
The pressing force detection device (hereinafter referred to as a pressing force detection device) 100 of the basic brake device is configured to be able to detect the pressing force to the wheel 10 of the brake 8 connected to the push rod 4 of the brake cylinder 3 via the basic brake device. Has been.

  Specifically, the pressing force detection device 100 includes four load cells 110, a support plate 120, a positioning unit 130, a handle unit 140, and an armored cable 150, as shown in FIG. The support plate 120, the positioning part 130, and the handle part 140 constitute a support part in the claims. Further, the load cell 110 corresponds to the pressing force detection unit in the claims.

  The load cell 110 is a well-known one that is circular and thin, and has a thickness dimension that is smaller than the gap dimension between the control wheel 8 and the wheel 10 during the non-pressing operation. This is a compression-type load cell that can detect the pressing force of the restrictor 8 against the wheel 10 when arranged between the two.

  The support plate 120 is made of a metal or a polymer material, and is configured as a thin rectangular plate that is curved. The support plate 120 is formed so as to be curved along the circumferential direction of the wheel 10 because the outer shape of the wheel 10 has a complex conical shape.

  Further, four load cells 110 are embedded on the surface side of the support plate 120 facing the control member 8 when arranged between the control device 8 and the wheel 10 along the circumferential direction of the wheel 10, The thickness dimension including the load cell 110 is 6.7 mm in this embodiment, and is set smaller than the gap dimension (about 10 mm) between the control wheel 8 and the wheel 10 during the non-pressing operation ( (See FIG. 2 (a)). As a result, the support plate 120 can support the load cell 110 between the control member 8 and the wheel 10 when the support plate 120 is disposed between the control member 8 and the wheel 10 along the circumferential direction of the wheel 10. is there.

  The four load cells 110 are arranged in two rows along the longitudinal direction of the support plate 120, and are arranged in two rows along a direction having a predetermined angle with the longitudinal direction of the support plate 120. Accordingly, the four load cells 110 are arranged in two rows along the circumferential direction of the wheel 10 when the support plate 120 is arranged between the control member 8 and the wheel 10, and It is arranged along a direction having a predetermined angle with the direction. Therefore, since the pressing force by the restrictor 8 acts equally on the four load cells 110 arranged along the circumferential direction of the wheel 10, the pressing force by the restrictor 8 can be measured more accurately (FIG. 2). (See (b)).

  The positioning portion 130 is formed in a long and narrow plate shape, and a surface of the support plate 120 opposite to the surface on which the load cell 110 is fixed and one surface thereof are orthogonal to each other, and one end thereof is a thin plate-like support plate. It is fixed to one side of 120. Further, in the positioning unit 130, a magnet 131 is embedded in a portion that comes into contact with the wheel 10 when the support plate 120 is disposed between the control wheel 8 and the wheel 10 so as to follow the circumferential direction of the wheel 10.

  The handle part 140 is formed in a rod shape, and is fixed so as to extend perpendicularly to the surface opposite to the surface to which the support plate 120 of the positioning part 130 is fixed. As a result, when the support plate 120 is disposed between the control member 8 and the wheel 10 so as to follow the circumferential direction of the wheel 10 and the magnet 131 of the positioning unit 1130 comes into contact with the wheel 10, the handle unit 140 is moved to the wheel 10. It is comprised so that it may become parallel with 10 rotating shafts. The handle portion 140 corresponds to a grip portion.

  The armored cable 150 is an armored cable that electrically connects each load cell 110 and a load measuring device (not shown), and the four cables electrically connected to each load cell 110 are supported by a support plate. In addition to being wired inside the groove formed in 120, one cable in which four cables are added and connected is wired in the through hole formed in the positioning portion 130 and the handle portion 140. . The other end of the armored cable 150 is connected to a load measuring device. The load measuring device has a function of calculating the pressing force of the control member 8 against the wheel 10 as an average value of loads applied to the four load cells 110 and displaying the calculation result.

[2. Description of a method for detecting the pressing force by the control 8]
Next, a method for detecting the pressing force by the restrictor 8 will be described.
When detecting the pressing force by the restrictor 8, the load cell 110 and the support plate 120 of the pressing force detection device 100 are placed in the gap between the restrictor 8 and the wheel 10 during the non-pressing operation when the vehicle is stationary. (See FIG. 2A) Subsequently, the pressing force detection device 100 is attached to the wheel 10 by bringing the magnet 131 of the positioning unit 130 into contact with the wheel 10. At this time, if the operator holds the handle portion 140, the operation is easy to perform. Further, the armored cable 150 is connected to the load measuring device. Then, compressed air is supplied to the brake cylinder 3 via the input port 3b. Then, the control device 8 moves toward the wheel 10 and the load buttons of the four load cells 110 are pressed against the tread surface of the stationary wheel 10 (refer to FIG. 2B during the pressing operation). As a result, the pressing force of the restrictor 8 against the wheel 10 can be displayed on the load measuring device as an average value of the loads applied to the four load cells 110.

  Note that when the detection of the pressing force by the restrictor 8 is completed, the supply of compressed air to the brake cylinder 3 is stopped. When the restrictor 8 is separated from the wheel 10 (in the non-pressing operation, refer to FIG. 2A), the magnet 131 of the positioning unit 130 is removed from the wheel 10 and the load cell 110 and the support plate 120 of the pressing force detecting device 100 are not pressed. It is taken out from the gap between the control wheel 8 and the wheel 10 during operation.

[3. Effect of First Embodiment]
(1) As described above, according to the pressing force detection device 100 of the first embodiment, the support plate 120 is formed in a curved thin plate shape, the load cell 110 is embedded in one surface thereof, and the thickness dimension including the load cell 110 has a thickness dimension. It is comprised smaller than the clearance dimension between the control wheel 8 and the wheel 10 at the time of non-pressing operation | movement. And when the support plate 120 is arrange | positioned between the restrictor 8 and the wheel 10 so that the circumferential direction of the wheel 10 may be followed, the load cell 110 can be supported between the restrictor 8 and the wheel 10. FIG. Further, the load cell 110 described above can detect the pressing force of the control member 8 against the wheel 10 when it is disposed between the control member 8 and the wheel 10.

  Therefore, it is possible to detect the pressing force of the control wheel 8 by sandwiching the load cell 110 in the gap between the wheel 10 and the control wheel 8 without removing the control wheel 8. Further, there is no need to adjust the stroke when remounting the removed control 8 as in the prior art, and the pressing force can be efficiently detected in this respect. In addition, the support plate 120 is formed in a curved thin plate shape, and the support plate 120 is deformed when the control member 8 is pressed, so that the load cell 110 comes into contact with the periphery of the wheel 10, so that the pressing force of the basic brake device is reliably detected. And it is not necessary to prepare an attachment for each wheel shape.

  (2) Further, according to the pressing force detection device 100 of the first embodiment, when arranged between the control device 8 and the wheel 10 along the circumferential direction of the wheel 10, the control device 8 of the support plate 120. Since the four load cells 110 are embedded on the surface side facing the support plate 120, when the support plate 120 is disposed between the control wheel 8 and the wheel 10 along the circumferential direction of the wheel 10, The load cell 110 to be embedded faces the control member 8, and the surface of the support plate 120 opposite to the surface on which the load cell 110 is embedded faces the wheel 10. As a result, the load cell 110 directly contacts the control wheel 8 during the pressing operation, so that the pressing force by the control wheel 8 can be measured more accurately.

  Moreover, since there are four load cells 110 described above, the pressing force acting on each load cell 110 can be reduced. Further, the load cell 110 having a small allowable pressing force may be selected, and the thickness dimension of the load cell 110 and the thickness dimension of the support plate 120 including the load cell 110 can be further reduced. It becomes easy to install in the gap between.

  (3) Further, according to the pressing force detection device 100 of the first embodiment, the support plate 120 is made of a metal or a polymer material and is formed in a curved rectangular thin plate shape. However, it can be deformed in accordance with the gap between the control wheel 8 and the wheel 10 during the pressing operation, and can return to its original shape due to its elasticity during the non-pressing operation of the control device 8.

  (4) Also, according to the pressing force detection device 100 of the first embodiment, the four load cells 110 are arranged in two rows along the longitudinal direction of the support plate 120, and the predetermined length with respect to the longitudinal direction of the support plate 120. They are arranged in two rows along a direction having an angle. Accordingly, the four load cells 110 are arranged in two rows along the circumferential direction of the wheel 10 when the support plate 120 is arranged between the control member 8 and the wheel 10, and It is arranged along a direction having a predetermined angle with the direction. Therefore, the pressing force by the restrictor 8 acts equally on the four load cells 110 arranged along the circumferential direction of the wheel 10, so that the pressing force by the restrictor 8 can be measured more accurately.

  (5) Moreover, according to the pressing force detection apparatus 100 of 1st embodiment, it is formed in the elongate plate shape, the surface on the opposite side to the surface to which the load cell 110 of the support plate 120 is fixed, and its one surface. Since the positioning member 130 has one end fixed to one side of the thin plate-like support plate 120 in a state in which the support plates 120 are orthogonal to each other, the control member 8 is arranged so that the support plate 120 follows the circumferential direction of the wheel 10. When the positioning unit 130 is disposed between the wheel 10 and the wheel 10, the position of the load cell 110 with respect to the control wheel 8 can be easily determined.

  (6) Further, according to the pressing force detection device 100 of the first embodiment, the positioning unit 130 is disposed between the control member 8 and the wheel 10 so that the support plate 120 is along the circumferential direction of the wheel 10. At this time, since the magnet 131 is embedded in the portion that comes into contact with the wheel 10, since the wheel 10 is made of iron, the positioning unit 130 can be fixed to the wheel 10 with the magnet 131, and the position is not easily displaced.

  (7) Moreover, according to the pressing force detection apparatus 100 of 1st embodiment, it is formed in a rod shape and is extended perpendicularly to the surface on the opposite side to the surface to which the support plate 120 of the positioning part 130 is fixed. Since the handle portion 140 is fixed, the operator can easily perform the operation of placing the load cell 110 between the control wheel 8 and the wheel 10 by holding the handle portion 140.

[4. Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, It is possible to implement in the following various aspects.

  (1) In the above embodiment, the four load cells 110 are arranged in two rows along the longitudinal direction of the support plate 120 and are arranged in two rows along a direction having a predetermined angle with the longitudinal direction of the support plate 120. However, it is not limited to this. For example, the number of load cells 110 may be other than four. In addition, when the number of the load cells 110 is three or more and arranged in two rows, it is preferable because the pressing force by the restrictor 8 acts on each load cell 110 stably. Further, the load cells 110 may be arranged in one row or three or more rows along the longitudinal direction of the support plate 120, or the load cells 110 may be arranged in one row or three or more rows along a direction having a predetermined angle with the longitudinal direction of the support plate 120. You may arrange in.

(2) Further, a part of the support plate 120 may be cut out. In this way, the support plate 120 is easily deformed in accordance with the gap between the control wheel 8 and the wheel 10 during the pressing operation, and each of the support plates 120 is arranged around the wheel 10 having a complex composite cone shape. The load cells 110 are easily contacted evenly, and the pressing force by the restrictor 8 acts on each load cell 110 evenly, so that the pressing force by the restrictor can be detected more accurately.
[Second Embodiment]
FIG. 3 is an overall configuration diagram showing a pressing force detection device of the basic brake device of the second embodiment.

  In the pressing force detection device 100 of the first embodiment, the support plate 120 is disposed between the control wheel 8 and the wheel 10 so that the support plate 120 extends along the circumferential direction of the wheel 10, and the magnet 131 of the positioning unit 130 contacts the wheel 10. When contacting, the handle portion 140 is configured to be parallel to the rotation axis of the wheel 10.

  On the other hand, as shown in FIG. 3, the pressing force detection device 200 according to the second embodiment is arranged between the control member 8 and the wheel 10 so that the support plate 220 is along the circumferential direction of the wheel 10. When the magnet 235 of the positioning unit 230 abuts on the wheel 10, the handle unit 240 is configured to move away from the rotation axis of the wheel 10 as it goes from one end to the other end. The configuration of the pressing force detection device 200 will be described below.

[1. Description of Configuration of Pushing Force Detection Device 200]
Similar to the pressing force detection device 100, the pressing force detection device 200 is configured to be able to detect the pressing force applied to the wheel 10 of the restrictor 8 connected to the push rod 4 of the brake cylinder 3 via a basic brake device. . Specifically, the pressing force detection device 200 includes four load cells 110, a support plate 220, a positioning unit 230, and a handle unit 240, as shown in FIG. The support plate 220, the positioning part 230, and the handle part 240 constitute a support part in the claims.

In addition, in 2nd embodiment, since many parts are common with 1st embodiment, description is abbreviate | omitted using the same code | symbol as 1st embodiment.
The support plate 220 is made of a metal or a polymer material, and is configured as a thin rectangular plate that is curved. The support plate 220 is formed so as to be curved along the circumferential direction of the wheel 10 because the outer shape of the wheel 10 has a complex conical shape.

  Further, four load cells 110 are embedded on the surface side of the support plate 220 facing the control member 8 when it is disposed between the control device 8 and the wheel 10 along the circumferential direction of the wheel 10. In the present embodiment, the thickness dimension of the support plate 220 including the load cell 110 is 6.7 mm in the present embodiment, and the gap dimension between the wheel restrictor 8 and the wheel 10 during the non-pressing operation ( Is set smaller than about 10 mm) (see FIG. 2A). As a result, the support plate 220 can support the load cell 110 between the control member 8 and the wheel 10 when the support plate 220 is disposed between the control member 8 and the wheel 10 along the circumferential direction of the wheel 10. is there.

  In addition, the support plate 220 is bent toward one side of the support plate 220 facing the wheel 10 when it is disposed between the control member 8 and the wheel 10 (in this embodiment, approximately 45 degrees). ). Then, one end of the mounting plate 231 of the positioning portion 230 formed in an elongated plate shape is fixed to the bent portion with a screw 232.

  Further, one end of a plate-like bracket 233 bent into a U-shape is fixed to the other end of the mounting plate 231 of the positioning portion 230 with a screw 234. In the present embodiment, the bracket 233 is bent into a substantially square shape from the center so that the angle formed by both ends is an acute angle of about 45 degrees. Further, a magnet 235 having a substantially rectangular parallelepiped shape is fixed on the side facing the wheel 10 in the vicinity of the other end of the bracket 233. As a result, the support plate 220 and the bracket 233 are orthogonal to each other, and the bracket 233 is mounted on the wheel 10 when the support plate 220 is disposed between the control member 8 and the wheel 10 so as to be along the circumferential direction of the wheel 10. By attaching the magnet 235 to the wheel 10 with its magnetic force, the pressing force detection device 200 can be detachably fixed while positioning with respect to the wheel 10. Note that the mounting plate 231, the screw 232, the bracket 233, the screw 234, and the magnet 235 constitute the positioning unit 230.

  In addition, a rod-like handle portion 240 is fixed to substantially the center of the mounting plate 231 of the positioning portion 230 so as to extend vertically. Note that the handle portion 240 corresponds to the gripping portion of the claims. As a result, one end of the handle portion 240 is fixed to the mounting plate 231 of the positioning portion 230, and the support plate 220 is disposed between the control wheel 8 and the wheel 10 so as to follow the circumferential direction of the wheel 10. When the magnet 235 of the positioning unit 230 is disposed and abuts against the wheel 10, it moves away from the rotating shaft of the wheel 10 as it goes from one end to the other end.

  A connection terminal 241 is provided at the rear end portion of the handle portion 240. In addition, four cables electrically connected to each load cell 110 are routed inside the groove formed in the support plate 220, and one cable obtained by adding and connecting the four cables is the positioning unit 230. The through holes formed in the mounting plate 231 and the handle portion 240 are armored and wired, and the end of the cable is connected to the connection terminal 241. A cable (not shown) that is electrically connected to a load measuring device (not shown) can be connected to the connection terminal 241. When a cable is connected to the connection terminal 241, each load cell 110 and the load measuring device are electrically connected.

  In addition, about the method of detecting the pressing force by the restrictor 8 using the pressing force detection apparatus 200 of 2nd embodiment, it is the same as that of the above-mentioned detection method using the pressing force detection apparatus 100 of 1st embodiment. Detailed description thereof is omitted here. In the pressing force detection device 200 of the second embodiment, the handle portion 240 has one end fixed to the mounting plate 231 of the positioning portion 230 and the support plate 220 along the circumferential direction of the wheel 10. When the magnet 235 of the positioning unit 230 is disposed between the control member 8 and the wheel 10 and comes into contact with the wheel 10, it moves away from the rotating shaft of the wheel 10 as it goes from one end to the other end. Therefore, when the operator grips the handle portion 240, the operation becomes easier.

[2. Effect of Second Embodiment]
Thus, according to the pressing force detection device 200 of the second embodiment, the handle portion 240 has one end fixed to the mounting plate 231 of the positioning portion 230 and the support plate 220 in the circumferential direction of the wheel 10. When the magnet 235 of the positioning part 230 contacts the wheel 10 and is disposed between the control member 8 and the wheel 10 so as to be along, the distance from the rotation axis of the wheel 10 increases from one end to the other end. It is like that. This makes it difficult for the operator's hand holding the handle portion 240 to come into contact with a cart structure such as the cart cross beam 1 when installing the pressing force detection device 200. In addition, when the operator grips the handle portion 240, the work is easier to perform.
[Third embodiment]
FIG. 4 is a schematic configuration diagram showing a load measuring device as a basic brake efficiency calculating device. FIG. 5 is an explanatory view showing the case surface of the load measuring device.

[1. Description of Configuration of Load Measuring Device 300]
As shown in FIG. 4, a load measuring device 300 as a basic brake efficiency calculating device includes a case 301, a calculation / control unit 302, and an AC / DC converter 303, and the calculation / control unit 302 and AC / DC The DC converter 303 and the case 301 are built in.

  Further, as shown in FIG. 5, on the surface of the case 301, there are an AC 100V power input 304, a DC 24V power input 305, a power switch 306, a touch panel display 307, a brake force sensor display 308, and a pressure sensor. A display 309, a brake force sensor input connector 310, a pressure sensor input connector 311 and an RS-232C port 312 are attached.

  An AC 100V power supply can be connected to the AC 100V power input 304, and power supplied from the AC 100V power supply can be input to the AC / DC converter 303. The AC / DC converter 303 converts the power supplied from the AC 100V power source into DC 24V when the power switch 6 is in the closed state, and calculates / controls the controller 302, the touch panel display 307, and the brake force sensor display 308. , And supply to each part such as the pressure sensor display 309.

  A DC24V power supply can be connected to the DC24V power supply input 305, and the power supplied from the DC24V power supply is calculated when the power switch 6 is in the closed state. 307, a brake force sensor display 308, a pressure sensor display 309, and the like.

  An external brake force sensor 313 can be connected to the brake force sensor input connector 310 via a cable, and an output signal from the brake force sensor 313 is input to the brake force sensor display 308 and the calculation / control unit 302. Can do. The brake force sensor indicator 308 has a function of displaying the value of the brake force (the pressing force of the brake control device 8 against the wheel 10) based on the output signal from the brake force sensor 313. The brake force sensor 313 is a known sensor that detects the brake force, but instead of the brake force sensor 313, the pressing force detection device 100 of the first embodiment or the pressing force detection device 200 of the second embodiment is used. May be.

  An external BC pressure sensor 314 can be connected to the pressure sensor input connector 311 via a cable, and an output signal from the BC pressure sensor 314 can be input to the pressure sensor display 309 and the calculation / control unit 302. . The BC pressure sensor 314 is a sensor that detects a brake cylinder pressure (hereinafter referred to as a BC pressure) that is a pressure in the brake cylinder. The pressure sensor indicator 309 has a function of displaying a BC pressure value based on an output signal from the BC pressure sensor 314.

  An external personal computer 315 can be connected to the RS-232C port 312 via an RS-232C cable, and various data can be transmitted and received between the personal computer 315 and the arithmetic / controller 302.

The touch panel display 307 has a configuration in which operation switches are integrated with a display surface of a display unit capable of displaying various types of information.
The arithmetic / control unit 302 is mainly configured by a known PLC (sequencer) including a CPU, a ROM, a RAM, an I / O, a bus line connecting these components, and the like. The arithmetic / control unit 302 has a function of recording various types of information in a built-in RAM. Furthermore, when the power switch 6 is turned on and the DC 24V power starts to be supplied, the arithmetic / control unit 302 starts a basic brake efficiency calculation process described later.

  The case 301 corresponds to a storage unit. The calculation / control unit 302 corresponds to a pressing force acquisition unit, an action force acquisition unit, a detection unit, a calculation unit, and a recording unit. The touch panel display 307 corresponds to a display unit.

[2. Explanation of basic brake efficiency calculation process]
Next, basic brake efficiency calculation processing executed by the calculation / control unit 302 of the load measuring device 300 will be described with reference to the flowchart of FIG.

  This process is started when the power switch 6 of the load measuring device 300 is turned on and 24 VDC power is supplied to each part of the load measuring device 300. In the following description, an external brake force sensor 313 is connected to the brake force sensor input connector 310 via a cable, and an external BC pressure sensor 314 is connected to the pressure sensor input connector 311 via a cable. It is assumed that

  First, in step S110, it is determined whether or not the load (brake force) is larger than a predetermined start load in order to confirm that the brake is released at the start of this process. The starting load is set in advance by experiments or the like. If the load is larger than the predetermined start load (S110: Yes), it is determined that the brake has not been released at the start of this process, so S110 is continued until it is determined that the brake has been released at the start. Wait while repeatedly executing. On the other hand, when the load is not larger than the predetermined start load (S110: No), it is determined that the brake is released at the start of this process, and the process proceeds to S120.

  In S120, in order to confirm that the brake action has been started, it is determined whether or not the load is larger than a predetermined start load. If the load is not greater than the predetermined start load (S120: No), it is determined that the brake action has not been started, and the system waits while repeatedly executing S120 until the brake action is started. On the other hand, when the load is larger than the predetermined start load (S120: Yes), it is determined that the brake action has started, and the process proceeds to S130.

  In S130, in order to confirm that the brake stage is stable, it is determined whether or not the fluctuation of the load is smaller than a predetermined stable load and 3 seconds have passed since the braking operation was started. The stable load is set in advance by experiments or the like. If the load fluctuation is not smaller than the predetermined stable load or if 3 seconds have not passed since the brake action was started (S130: No), it is determined that the brake stage is not stable and the brake stage is stable. It waits, repeating S130 until it is judged. On the other hand, when the load fluctuation is smaller than the predetermined stable load and 3 seconds have elapsed after the braking action is started (S130: Yes), it is determined that the brake stage is stable, and the process proceeds to S140.

In S140, the touch panel display 307 displays that the brake stage is stable to indicate to the operator that the brake stage is determined to be stable in S130, and the load data and air pressure data (BC Pressure) is recorded in RAM and the step number is incremented.

  At this time, the basic brake efficiency η is also calculated and recorded together with the load data and the air pressure data. The basic brake efficiency η is calculated using the following equation (1). Fc is calculated using the following equation (2).

η = ΣFSi / (Fc · ΣMi) (1)
Fc = _PBC · _SBC Formula (2)
Note that FSi is the brake force acting force (brake force, pressing force), Fc is the brake cylinder acting force (acting force, BC pressure), P _BC is the brake cylinder working air pressure, and S _BC is the brake cylinder breaking force. Is the area, and Mi is the individual leverage.

Then, the calculated basic brake efficiency is displayed on the touch panel display 307, and the load data, air pressure data, and basic brake efficiency are recorded in the RAM and the step number is increased.

  In subsequent S150, in order to confirm that the brake is released, it is determined whether or not the load is larger than a predetermined start load. When the load is larger than the predetermined start load (S150: Yes), it is determined that the brake is not released, and thus the system waits while repeatedly executing S150 until it is determined that the brake is released. On the other hand, when the load is not larger than the predetermined start load (S150: No), it is determined that the brake is released, and the process proceeds to S160.

In S160, it is determined whether or not 30 seconds have elapsed since the braking action was started in S120. If 30 seconds have not elapsed since the start of the braking action (S160: No), the process returns to S120 to confirm the re-brake, and the processes after S120 are executed again. On the other hand, if 30 seconds have elapsed since the braking action was started (S160: Yes), one unit of measurement is terminated and the data number is increased (S170), and S1 is used to perform the next measurement.
Returning to 20, the processing from S120 onward is executed again.

[3. Effects of the third embodiment]
(1) As described above, according to the load measuring device 300 of the third embodiment, when the brake operation is detected, the calculation / control unit 302 increases the basic brake efficiency based on the value of the brake force and the value of the BC pressure. calculate. Therefore, since the brake efficiency is calculated when the brake operation is performed, the accuracy of the calculation result can be increased. Moreover, after the power switch 6 is turned on, the brake efficiency can be automatically calculated only by performing a brake operation manually or by air pressure.

  (2) Moreover, according to the load measuring device 300 of the third embodiment, since the basic brake efficiency is calculated when the brake stage is stable, the calculation accuracy of the basic brake efficiency can be increased.

  (3) Moreover, according to the load measuring device 300 of 3rd embodiment, since load data, air pressure data, and the calculated basic brake efficiency are recorded on RAM, the recorded content can be utilized.

  (4) Further, according to the load measuring device 300 of the third embodiment, the calculation / control unit 302 and the AC / DC converter 303 are built in the case 301, and furthermore, the surface of the case 301 has an AC 100V power input. 304, DC 24V power input 305, power switch 306, touch panel display 307, brake force sensor display 308, pressure sensor display 309, brake force sensor input connector 310, and pressure sensor input connector 311. And an RS-232C port 312 are attached. Thus, the load measuring device 300 can be easily carried, and the load measuring device 300 can be used even in a poor environment such as an inspection / repair line.

  (5) Moreover, according to the load measuring device 300 of the third embodiment, since the calculated basic brake efficiency is displayed on the touch panel display 307, by calculating and displaying the calculated brake efficiency in real time, The convenience of the operator can be improved.

It is a whole block diagram which shows the pressing force detection apparatus of the basic brake apparatus of 1st embodiment. It is explanatory drawing explaining the effect | action of the pressing force detection apparatus of the basic brake apparatus of 1st embodiment, (a) shows the state installed in the clearance gap between a control wheel and a wheel at the time of non-pressing operation, b) shows a state in which the pressing force of the control wheel is detected by being installed in the gap between the control wheel and the wheel during the pressing operation. It is a whole block diagram which shows the pressing force detection apparatus of the basic brake apparatus of 2nd embodiment. It is a schematic block diagram which shows the load measuring device of 3rd embodiment. It is explanatory drawing which shows the case surface of a load measuring device. It is a flowchart which shows a basic brake efficiency measurement process. (A) Whole structure diagram (1) which shows the pressing force detection apparatus of the conventional basic brake apparatus, (b) is a whole block diagram (2) which shows the pressing force detection apparatus of the conventional basic brake apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bogie cross beam, 2 ... Case, 3 ... Brake cylinder, 3b ... Input port, 4 ... Push rod, 5 ... Connecting rod, 5a ... Pin, 5b ... Pin, 6 ... Spherical bearing, 6a ... Hole, 7 ... Control wheel head , 7a ... pin, 7b ... suspending member, 8 ... controlling member, 9 ... gap adjusting screw rod, 9a ... pin, 9b ... screw part, 10 ... wheel, 10a ... wheel tread, 11 ... load cell, 11a ... load Buttons: 12 ... Test brake, 13 ... Load measuring device, 14 ... Strain gauge, 15 ... Bridge box, 16 ... Amplifying device, 17 ... Calculation processing unit, 100 ... Pushing force detection device, 110 ... Load cell, 120 ... Support Plate 130: Positioning part 131 131 Magnet 140 Handle part 150 Armored cable 200 Pushing force detection device 220 Supporting plate 230 Positioning part 231 Mounting plate 232 234 Screw 23 ... Bracket, 235 ... Magnet, 240 ... Handle part, 241 ... Connection terminal, 300 ... Load measuring device, 301 ... Case, 302 ... Calculation / control unit, 303 ... AC / DC converter, 304 ... AC100V power input, 305 ... DC24V power input, 306 ... power switch, 307 ... touch panel display, 308 ... brake force sensor display, 309 ... pressure sensor display, 310 ... brake force sensor input connector, 311 ... pressure sensor input connector, 312 ... RS232C Port, 313 ... Brake force sensor, 314 ... BC pressure sensor, 315 ... Personal computer

Claims (16)

A pressing force detection device for a basic brake device capable of detecting a pressing force applied to a wheel of a restrictor coupled to a push rod of a brake cylinder via a basic brake device,
When the thickness dimension is configured to be smaller than the gap dimension between the wheel restrictor and the wheel at the time of non-pressing operation and the wheel is disposed between the wheel restrictor and the wheel, the wheel restrictor to the wheel is configured. A pressing force detector that can detect the pressing force;
It is formed in a curved thin plate shape, and the pressing force detection part is embedded in one surface thereof, and the thickness dimension including the pressing force detection part is larger than the gap dimension between the control wheel and the wheel during non-pressing operation. A small support plate, and when the support plate is arranged between the wheel restrictor and the wheel so as to be along the circumferential direction of the wheel, the pressing force detection unit is connected to the wheel restrictor and the wheel. A support part that can be supported between,
Equipped with a,
When the support plate is disposed between the wheel restrictor and the wheel so that the support plate is along the circumferential direction of the wheel, the pressing force detecting unit against the wheel restrictor comes into contact with the wheel. A pressing force detecting device for a basic brake device, comprising a positioning portion for determining the position of the base brake device. In the pressing force detection device of the basic brake device according to claim 1,
The pressing force detection unit is embedded in a surface of the support plate that is disposed between the control member and the wheel so as to be along the circumferential direction of the wheel and faces the control member. Pushing force detection device for brake device. In the pressing force detection device for a basic brake device according to claim 1 or 2,
The pressing force detection device for a basic brake device, wherein the support plate of the support portion is made of a metal material. In the pressing force detection device for a basic brake device according to claim 1 or 2,
The pressing force detection device for a basic brake device, wherein the support plate of the support portion is made of a polymer material. In the pressing force detection device for a basic brake device according to any one of claims 1 to 4,
A pressing force detection device for a basic brake device, wherein a plurality of the pressing force detection units exist. In the pressing force detection device of the basic brake device according to claim 5,
The plurality of pressing force detectors are arranged along the circumferential direction of the wheel when the support plate is arranged between the control wheel and the wheel. Force detection device. In the pressing force detection device of the basic brake device according to claim 6,
The plurality of pressing force detection units are arranged in two or more rows along a circumferential direction of the wheel when the support plate is arranged between the control wheel and the wheel. Pushing force detection device for brake device. In the pressing force detection device for a basic brake device according to any one of claims 5 to 7,
The plurality of pressing force detection units are arranged along a direction having a predetermined angle with a circumferential direction of the wheel when the support plate is arranged between the control wheel and the wheel. The pressing force detection device for the basic brake device.   In the pressing force detection device for a basic brake device according to any one of claims 1 to 8,
  The positioning portion of the support portion includes a magnet disposed at a portion that contacts the wheel when the support plate is disposed between the control wheel and the wheel so as to be along a circumferential direction of the wheel. A pressing force detecting device for a basic brake device, comprising:   In the pressing force detection device for a basic brake device according to any one of claims 1 to 9,
  The pressing force detection device for a basic brake device, wherein the support portion has a rod-shaped gripping portion that can be gripped by an operator.   In the pressing force detection device of the basic brake device according to claim 10,
  The gripping part is fixed at the one end to the support plate, and is disposed between the control wheel and the wheel so that the support plate is along the circumferential direction of the wheel. A pressing force detecting device for a basic brake device, wherein the pressing force detecting device is configured to move away from the rotating shaft of the wheel as it goes from one end to the other end when contacting the wheel.   A pressing force acquisition unit capable of acquiring the pressing force detected by the pressing force detection device according to any one of claims 1 to 11,
  An action force acquisition unit capable of acquiring an action force detected by an action force detection unit capable of detecting an action force acting on a push rod of the brake cylinder;
  A detection unit for detecting a brake operation based on the applied force detected by the applied force detection unit;
  A calculation unit that calculates a basic brake efficiency based on the pressing force acquired by the pressing force acquisition unit and the action force acquired by the action force acquisition unit when a brake operation is detected by the detection unit;
  A basic brake efficiency calculating device comprising:   In the basic brake efficiency calculating device according to claim 12,
  In the case where a brake operation is detected by the detection unit, the calculation unit, when the applied force detected by the applied force detection unit is stable, and the pressing force acquired by the pressing force acquisition unit and the A basic brake efficiency calculating device that calculates basic brake efficiency based on an applied force acquired by an applied force acquisition unit.   In the basic brake efficiency calculating device according to claim 12 or 13,
  A basic brake efficiency calculating apparatus comprising a recording unit that records the basic brake efficiency calculated by the calculating unit.   In the basic brake efficiency calculating device according to claim 14,
  A basic brake efficiency calculation device comprising: a storage unit capable of storing at least the pressing force acquisition unit, the acting force acquisition unit, the detection unit, the calculation unit, and the recording unit.   In the basic brake efficiency calculation device according to any one of claims 12 to 15,
  A basic brake efficiency calculation device comprising a display unit for displaying the basic brake efficiency calculated by the calculation unit.