Technical field
[0001]
　The present invention relates to an eddy current rail brake.
BACKGROUND
[0002]
　The braking device for decelerating the railway car, usually, the braking apparatus utilizing the friction between the rail and the wheel is used. However, when using a braking device which utilizes a frictional force, the force applied at the time of braking exceeds the frictional force, so that the glide wheels on the rails in a state where the wheel is stopped. Therefore, only made use of frictional force braking device, there is a case of rail vehicles (especially faster the railway vehicle) is difficult to brake a short distance. Therefore, it has been proposed to use a eddy current rail brake using permanent magnets (for example, Patent Documents 1 and 2).
[0003]
　The claim 1 of Patent Document 1, a brake device comprising a liftable pole, and a permanent magnet rotatably provided in the inside magnetic pole is disclosed.
[0004]
　FIG. 1 of Patent Document 2, the magnet unit used in the rail brake is disclosed. In the magnet unit, a plurality of permanent magnets are fixed to the support plate of ferromagnetic York, the center of the support plate is provided with 杆材. The 杆材 has trunnions. By rotating the 杆材 around the trunnion, it is fixed a permanent magnet rotating on the support plate.
CITATION
Patent Document
[0005]
Patent Document 1: JP-A-10-167068 Patent Publication
Patent Document 2: JP 2010-83446 JP
Summary of the Invention
Problems that the Invention is to Solve
[0006]
　In the rail brake, the permanent magnets, it may collide ballast is scattered, such as crushed stone, magnetic powder (abrasion powder of the rails, etc.) and water (such as rainwater) is or adhere. Magnet damage the scattered ballast strikes the magnet, the braking force decreases. Further, the powder of the magnetic body is large amount of adhesion, inhibits movement of the magnet, by a predetermined operation is impossible, may not be exhibited braking force. Further, when moisture adheres, magnetic force is decreased by rust permanent magnets, resulting braking force may decrease. Furthermore, there is a possibility that the permanent magnet is damaged by the collision of the foreign matter. When the permanent magnet or damaged degrade the reliability of the rail brake is reduced.
[0007]
　In the above circumstances, the present invention is one of the object to provide a rail brake long-term reliable eddy current.
Means for Solving the Problems
[0008]
　Eddy current rail brake according to an embodiment of the present invention, an eddy current rail brake for rail vehicles. The rail brake, the magnet array including a plurality of permanent magnets arranged in a row so as to face the rail in the braking state, a holding member for holding the magnet array, is rotatably supported together with the magnet array that a holding member, a tubular member that the magnet array covering throughout the longitudinal direction of the magnet array that rotates, the holding member at least one which is connected to at least one end portion to rotate the magnet array comprising a drive device. It is possible to switch between a braking state and a non-braking state by rotating the magnet array.
Effect of the invention
[0009]
　According to the present invention, long-term reliability is high eddy current rail brake is obtained.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010]
[Figure 1A] Figure 1A is a diagram schematically showing a part of an example of a rail brake in the first embodiment.
FIG 1B] Figure 1B is a diagram schematically showing an appearance of a rail brake as shown in Figure 1A.
FIG. 2 is a diagram schematically showing an example of a drive mechanism.
[Figure 3A] Figure 3A is a diagram showing a cross section of the rail brake as shown in FIG. 1A schematically.
[Figure 3B] Figure 3B is a diagram schematically showing the arrangement of the magnets in the rail brake of FIG. 1A.
[4] FIG. 4 is a cross-sectional view schematically showing another example of a rail brake in the first embodiment.
FIG. 5 is a diagram showing another example of a rail brake in the first embodiment schematically.
FIG. 6 is a diagram showing another example of a rail brake in the first embodiment schematically.
[7] FIG. 7 is a cross-sectional view schematically showing another example of a rail brake in the first embodiment.
[8] FIG. 8 is a cross-sectional view schematically showing another example of a rail brake in the first embodiment.
DESCRIPTION OF THE INVENTION
[0011]
　Hereinafter, embodiments of the present invention will be described. As will be described by way of example embodiments of the present invention in the following description, the present invention is not limited to the examples described below.
[0012]
　(Eddy current rail brake)
　rail brake according to the present embodiment, an eddy current rail brake for rail vehicles. The rail brake comprises a magnet array, and the holding member, and the tubular member, and at least one drive device. Magnet array comprises a plurality of permanent magnets arranged on opposable as a line in the rail. Holding member holds the magnet array. Holding member is rotatably supported with the magnet array. Tubular member covers the magnet array that rotates across the longitudinal direction of the magnet array. Drive device is connected to at least one end portion of the holding member to rotate the magnet array. It is possible to switch between a braking state and a non-braking state by rotating the magnet array. In the following, the magnet array and the opposing parts in the braking state of the tubular member may be referred to as "first portion", the magnet array and the opposing parts in the non-braking state of the tubular member "second it may be referred to as a portion ". Further, each of the two parts is between the first portion and the second portion may be referred to as "third portion".
[0013]
　Rail brake according to this embodiment has a ferromagnetic material may further include a arranged to face at least a portion of the magnet array in the non-braking state. The ferromagnetic material may hereinafter be referred to as "ferromagnetic (F)". A ferromagnetic material (F), a magnetic leakage in the non-braking state can be suppressed.
[0014]
　There is no limitation on the type of rail vehicle may be a railway vehicle running on rails. Rail brake of this embodiment is used particularly preferably for high-speed railways. Usually, rail brake is combined with common brake which utilizes a frictional force.
[0015]
　A plurality of permanent magnets are usually arranged in a row at intervals. Limited to the permanent magnet is not, can be used a permanent magnet which can be used for a reduction gear of the eddy current, it may be a known permanent magnets. Surface facing the inner peripheral surface of the inner tubular member of the permanent magnet (e.g., cylindrical member) may be a curved surface corresponding to the inner peripheral surface of the cylindrical member. According to this configuration, it is possible to shorten the distance between the permanent magnet and the rail in a braking state.
[0016]
　There is no limitation to the driving device (actuator), as long as it can rotate the holding member with the magnet array. Examples of drive, include the known actuator, for example, direct-acting air cylinder includes an electric cylinder, and the rotary cylinder. Drive device may be connected to an end portion of the holding member via the drive mechanism. An example of a drive mechanism is a mechanism that converts the rotary motion of the movement of the drive device (e.g., reciprocating) may be a known mechanism. Rail brake according to the present embodiment may further include a arranged a protective member to surround the drive mechanism. In this case, the drive mechanism by the protecting member is protected and the magnet array is protected by a tubular member.
[0017]
　The braking state, the magnet array is placed in the rail facing position. In the non-braking state, the magnet array is disposed at a position not rail facing. In one example, the position of the magnet array in the braking state, the position rotated 90 ° about the rotation axis of the holding member, the position of the magnet array in the non-braking state.
[0018]
　Tubular member may be a cylindrical member (cylindrical member). Alternatively, the tubular member may have a rectangular cylindrical shape, may have a shape combining a cylindrical and square tube. The tubular member is typically a cylindrical member. As described above, the tubular member includes a first portion and a second portion. These portions are part of both the tubular member. Typical tubular member does not comprise a part consisting of arranged ferromagnetic material so as to connect the first and second portions. According to this construction, the magnet array in the non-braking state force can be suppressed up to the rail. In one example, the entire tubular member is made of a nonmagnetic material. In two of the third portion connecting the first portion and a second portion, the non-magnetic material so as to cross the third portion over the entire longitudinal direction it may be disposed. Alternatively, the entire third portion may be made of a nonmagnetic material.
[0019]
　Incidentally, in the non-braking state, the rail brake of the present embodiment may be moved so as away from the rail to rotate the magnet array. For example, it is also possible to move the rail brake body (rail brake according to the present embodiment) upwardly in a non-braking state. Rail brake in this case further includes a mechanism for raising and lowering the rail brake body. The said mechanism may be a known mechanism.
[0020]
　Rail brake according to the present embodiment may include two driving devices connected to both ends of the holding member. By using two drive facilitates rotation of the holding member.
[0021]
　Rail brake according to the present embodiment may include two magnet arrays arranged in a row. By driving the two magnet rows with separate drive device, it can be switched between a braking state two magnet arrays independently and non-braking state. That is, it is possible to vary the intensity of the braking force of the rail brake. In this case, it surrounds the two opposite ends of the two magnet rows in the protective case, may be connected to drive each of the two ends that are not enclosed in the protective case.
[0022]
　Retaining member may comprise a holding plate a holding plate magnet array is fixed made of a ferromagnetic material. The holding plate can be made to function as a yoke. As long as the predetermined formable thickness, width of the magnetic circuit to express a braking force is secured, limited to the size and materials of the holding plate is not. May be a known ferromagnetic material is a ferromagnetic material, for example, may be used for machine structural use steel or general structural steel or the like. This also applies to other ferromagnetic materials in this specification (and made of a ferromagnetic material ferromagnet).
[0023]
　Rail brake according to the present embodiment, the holding member and / or the tubular member may comprise a frame which supports. In that case, at least a predetermined portion of the frame may be composed of a ferromagnetic material. Section of the frame may have a shape including an L-shaped cross-section. Here, "predetermined portion" is a portion to face at least a portion of the magnet array in the non-braking state. That is, at least a portion of the frame may be constituted by the ferromagnetic (F). Here, the cross section of the frame, (in another aspect a cross section perpendicular to the longitudinal direction of the frame) the cross section perpendicular to the axis of rotation of the holding member means. The cross section of the frame body may have a shape including a section of the U-shaped (bottom flat U-shape).
[0024]
　Some which may be a the ferromagnetic body frame (F), in a non-braking state, the region between two adjacent permanent magnets may be discontinuously arranged to at least face. Alternatively, ferromagnetic (F), in a non-braking state, or it may be continuously arranged so as to face the entire magnet array. By arranging the ferromagnetic body so as to face at least a part of the magnet column (F) in the non-braking state, the magnetic flux of the magnet array in the non-braking state can be prevented from leaking to the outside.
[0025]
　As described above, may be one whole of the tubular member is made of a nonmagnetic material. Examples of non-magnetic material, (the same is true for the other non-magnetic material in this specification) containing a non-magnetic resin and a non-magnetic metal (such as austenitic stainless steel or aluminum). By using a cylindrical member made of a nonmagnetic material, it is possible to prevent the magnetic circuit is not desired is formed.
[0026]
　At least a portion of the magnet array and the facing parts in braking state (a first portion) of the tubular member may be made of a ferromagnetic material. In that case, or may be cylindrical member other than the partially made of a nonmagnetic material. By configuring in least ferromagnetic part material of the first part, it is possible to concentrate the magnetic flux toward the rail in the braking state. For an example of position of the part will be described later. In a typical example, the portion made of ferromagnetic material within the tubular member (first portion) is arranged at a position facing the permanent magnet in the braking state.
[0027]
　Rail brake according to the present embodiment may further comprise a scraping member. Scraping member is magnet array when moving to the non-braking state from the braking state of the tubular member is disposed in contact with the outer surface of the portion that passes through. The portion of the magnet array passes is a portion between said first and second portions.
[0028]
　By the magnetic force of the magnet array, powder of the magnetic material (abrasion powder of the rail, etc.) it is drawn, to adhere to the outer surface of the tubular member. Powder of such magnetic body is moved with the rotation of the magnet array. As a result, it increases the load of rotation of the magnet rows, the tubular member is likely to or worn. By using the above scraping member, it is possible to shake off powder of the magnetic material. Limited to the shape of the member scraping rather, it may be a thin plate may be a columnar shape. There is no particular limitation on the material of the member scraping, as long as the effects of the present invention are obtained, may be used non-magnetic material or a ferromagnetic material.
[0029]
　Rail brake according to the present embodiment may further include a columnar ferromagnetic. Columnar ferromagnetic material, the magnet array is disposed along an outer surface of a portion through which shifts to a non-braking state from the braking state of the tubular member. The portion of the magnet array passes is a portion between said first and second portions. According to this configuration, it is possible to reduce the force required initial for rotating the magnet array. By arranging the pillar-shaped ferromagnetic so as to be in contact with the third portion, it is possible to function as a member scraped the ferromagnetic material.
[0030]
　Pole facing the rail in the braking state, it may be different permanent magnets adjacent to each other. According to this configuration, it is possible to obtain a strong braking force.
[0031]
　For example embodiments of the present invention will be described below with reference to the drawings. In the following description, it may be omitted from redundant explanation are denoted by the same reference numerals for similar parts. Furthermore, in the following drawings, for ease of understanding, or hatching, the embodiments, hatching is only a part of the member. As long as the effects of the present invention can be obtained, the components of the embodiments described below can be replaced with other components described above.
[0032]
　(First Embodiment)
　In the first embodiment, an example of a rail brake of the present invention. A part of the structure of the rail brake 100a and 100b of the first embodiment schematically shown in Figure 1A. Furthermore, schematically shown in FIG. 1B part of appearance and the rail 1 shown in FIG. 1A. In Figure 1A, it illustrates the interior of the tubular member 21 by showing only the outer edge of the tubular member 21. In FIGS. 1A and 1B, are omitted frame shown in Figure 3A.
[0033]
　In the first embodiment, for an example in which two rails brakes 100a and 100b are connected will be described, but may be used only one rail brake. In the following, each of the rail brake 100a and 100b, may be referred to as "rail brake 100 '.
[0034]
　Rail brake 100 is typically secured to a railway vehicle bogie. Rail brake 100 includes a magnet unit 10, the tubular member 21 and the driver 31.
[0035]
　Magnet unit 10 includes a magnet array 11, the holding member 12 for holding the magnet array 11. Holding member 12, it includes a rotary shaft 14 and the holding plate 13. Rotation shaft 14 extends in the longitudinal direction of the magnet array 11. Rotary shaft 14 may be fixed to the holding plate 13 by bolts or the like, it may be secured to the holding plate 13 by another connecting member.
[0036]
　Magnet array 11 includes a plurality of permanent magnets 11a arranged in a row. Region from one end of the permanent magnet 11a of the magnet array 11 to the permanent magnet 11a of the other end of an area of ​​the magnet array 11. Holding plate 13 holds the magnet array 11 (plurality of permanent magnets 11a). Holding plate 13 is made of a ferromagnetic material, which functions as a yoke. Both ends of the rotary shaft 14 is rotatably supported by bearings (not shown). That is, the holding member 12 is rotatably supported with the magnet array 11. Incidentally, FIG. 1A magnet array 11 of the rail brake 100a is in the position of the braking state, the magnet array 11 of the rail brake 100b indicates an example of a state in the position of non-braking state.
[0037]
　In the example shown in the first embodiment, the tubular member 21 has a cylindrical shape. The tubular member 21, a magnet array 11 rotating, covers over the entire longitudinal direction of the magnet array 11. As described above, the tubular member 21 may be one whole is made of a nonmagnetic material. In the example shown in FIGS. 1A and 1B, a portion of two tubular members 21 are opposed to each other, surrounded by the box-shaped protective cover 41.
[0038]
　As shown in FIG. 1B, tubular member 21, along its longitudinal direction in the longitudinal direction of the rail 1, and are arranged so as to face the upper surface 1a of the rail 1. Magnet array of the tubular member 21 11 faces the upper surface 1a of the rails 1 in the braking state.
[0039]
　Drive device 31 is connected to the holding member 12 (rotary shaft 14) by a drive mechanism. In Figure 1A, it is not illustrated driving mechanism. Drive mechanism is surrounded by a box-shaped protective cover (protective member) 32. Figure 1A shows an example of drive device 31 is connected to only one end of the retention member 12. However, the rail brake 100 may include two drive device 31 connected to both ends of the holding member 12.
[0040]
　An example of a driving mechanism in FIG. 2 illustrates schematically. 2, the protective cover 32 is only shown in the outline. The end of the rod 31a of the drive unit 31, U-shaped member 31b is secured. The rotary shaft 14 and the U-shaped member 31b are connected by the connecting member 33a and a pin 33b. At one end of the connecting member 33a rotating shaft 14 is fixed, the pin 33b is fixed to the other end. Pin 33b is disposed in the U-shaped member 31b, it is movable within the U-shaped member 31b. When the driving device 31 is driven by the rod 31a to the linear motion (reciprocating motion), the pin 33b is moved accordingly. As a result, the rotary shaft 14 is rotated. With the rotation of the rotary shaft 14, the magnet unit 10 (the magnet array 11) is rotated about the axis of rotation 14.
[0041]
　The cross-section along line IIIA-IIIA of Figure 1A, shown schematically in Figure 3A. A side view of the magnet unit 10, schematically shown in Figure 3B. Magnet unit 10, by rotating about the rotating shaft 14, to move between a position of non-braking state shown by the dotted line position and Figure 3A of the braking state shown in Figure 3A.
[0042]
　In the example shown in this embodiment, the permanent magnets 11a are arranged in a line at regular intervals. Further, the permanent magnet 11a is the direction toward the S pole to the N pole, are arranged parallel to the radial direction of a circle around the rotary shaft 14. In the following, there is a case where a direction from the S pole to N pole is referred to as "direction of the poles." Permanent magnets 11a are magnetic poles opposed to the top surface 1a of the rail 1 during braking, is different in the permanent magnets 11a adjacent to each other. That is, a plurality of permanent magnets 11a, the direction of the magnetic poles are arranged in a row so as to alternately inverted. Thus by arranging the permanent magnets 11a, it is possible to obtain a higher braking force.
[0043]
　As shown in cross section in FIG. 3A, the portion facing the inner peripheral surface of the inner tubular member 21 of the permanent magnet 11a has an arcuate cross-sectional shape corresponding to the inner peripheral surface of the cylindrical member 21 .
[0044]
　Referring to FIG. 3A, the rail brake 100 includes a frame member 51 made of a ferromagnetic material. Holding member 12 and / or tubular member 21 is supported by the frame 51 at a portion which is not shown. In other words, the frame body 51 functions as a structural member for supporting the holding member 12 and / or the tubular member 21. Frame 51 has a shape that can suppress the formation of a magnetic circuit that is not desired. In the example shown in FIG. 3A, the frame 51 has a L-shaped cross section.
[0045]
　Frame 51 having an L-shaped cross-section, a plate-like portion 51a facing the magnet array 11 in a non-braking condition, a plate-shaped portion 51b which is disposed on the side opposite to the rail 1 across the tubular member 21 including. Frame 51, as shown in FIG. 4, may have a cross-sectional shape of the U-shaped (bottom flat U-shape). Frame 51 having a U-shaped cross-section, in addition to the plate-like portion 51a and the plate-like portion 51b, the plate-like portion 51a to sandwich the tubular member 21 includes a plate-like portion 51c which is arranged on the opposite side .
[0046]
　Entire frame 51 may be a ferromagnetic material. Alternatively, only a portion of the frame body 51 is a ferromagnetic material, the other portion may be formed of a nonmagnetic material. In that case, it is possible to reduce the weight of the rail brake by using a non-magnetic metal material (e.g. a non-magnetic metal material of a lightweight, such as aluminum) as the material of the frame 51.
[0047]
　Referring to Figure 3A, portions 51ap of the frame 51 is a portion that faces the magnet array 11 in a non-braking state. It is preferable to constitute at least part 51ap of ferromagnetic material (F). By forming a part 51ap a ferromagnetic material, a magnetic leakage in the non-braking state can be suppressed.
[0048]
　At least a portion of the part 51ap (e.g. all) composed of a ferromagnetic material (F), may be formed other portions of non-magnetic material. In that case, the portion 51Ap, ferromagnetic (F) may be consecutively arranged. Alternatively, ferromagnetic (F) may be disposed discontinuously. More specifically, as shown in FIG. 5, a ferromagnetic member 51f may be discontinuously arranged to at least face the regions between two adjacent permanent magnets 11a. Figure 5 is a diagram schematically showing the arrangement of the ferromagnetic member 51f, a view of the frame 51 from the side. For reference, FIG. 5 shows the arrangement of the permanent magnets 11a in the non-braking state by a dotted line. As shown in FIG. 5, a ferromagnetic member 51f is disposed so as to straddle between the ends of two adjacent permanent magnets 11a. By arranging the ferromagnetic 51f Thus, the two adjacent permanent magnets 11a, a closed magnetic circuit between the ferromagnetic 51f facing the region therebetween is formed. As a result, it is possible to suppress the magnetic flux generated from the permanent magnet 11a in a non-braking state is leaked to the outside.
[0049]
　As shown in FIG. 3A, the tubular member 21 includes a first portion 21a that faces the magnet array 11 in the braking state, and a second portion 21b that faces the magnet array 11 in a non-braking state. Since the tubular member 21 is a cylindrical, two regions exist between the first portion 21a and second portion 21b. The region is the aforementioned "third portion". FIG 3A, the two third portions, a third portion 21c on the side where the magnet array 11 through which switching between the braking state and a non-braking state.
[0050]
　When all of the third portion is formed of a ferromagnetic material, it is that the magnetic leakage of the permanent magnets 11a in a non-braking state becomes a problem. Therefore, the tubular member 21 has a configuration such that the magnetic arrangement of magnets 11 in the non-braking state can be prevented from being transmitted to the rail through the tubular member 21. Specifically, two third portion comprises a non-magnetic material extending over the entire longitudinal direction of the tubular member 21 (a portion made of a non-magnetic material). Total at least two third portions may be made of a nonmagnetic material.
[0051]
　Entire tubular member 21 may be made of a nonmagnetic material. Alternatively, a portion of the first portion 21a may be made of a ferromagnetic material. By configuring a portion of the first portion 21a of a ferromagnetic material, easily lead a magnetic flux in the rail in the braking state. An example of a configuration of the rail brake in that case, schematically shown in FIG. Figure 6 shows a section along the longitudinal direction. In Figure 6, hatched only in the cylindrical member 21. The first portion 21a, discontinuous ferromagnetic 21f is disposed. Ferromagnetic 21f has been arranged at a position opposed to the permanent magnets 11a, to face the region 21n between two adjacent permanent magnets 11a position not disposed. According to this configuration, it is possible to prevent the two adjacent permanent magnets 11a, a closed magnetic circuit between the ferromagnetic 21f is formed.
[0052]
　In the rail brake 100 of the first embodiment, the whole of the magnet array 11 is protected by the tubular member 21. When rotating the holding member 12 and the magnet array 11 in the center of the holding member 12 by a drive device 31 connected via the 杆材 (structure of FIG. 1 of Patent Document 2), it is easy to enclose the entire magnet array 11 Absent. When you besiege the entire magnet array 11 in the case when such a case is heavy with the case is complicated. On the other hand, the rail brake 100, the drive apparatus 31 is connected to an end portion of the holding member 12. Therefore, it can be easily covered by the tubular member 21 the entire magnet array 11. By enclosing the magnet array 11 in the tubular member 21, it is possible to suppress the deterioration of the braking force due to deterioration of the permanent magnets.
[0053]
　Rail brake 100 may further include a scraping member in contact with the third portion 21c of the tubular member 21. Schematically shown in FIG. 7 an example of the structure of such a rail brake 100. Figure 7 shows a section perpendicular to the longitudinal direction. Scraping member 71 has a magnet array 11 equal to or longer. Scraping member 71 is in contact with the third portion 21c, and are arranged along the longitudinal direction of the tubular member 21. As described above, the third portion 21c, of two third portion between the first portion 21a and second portion 21b, is a part of the side of the magnet array 11 through which the rotating . Magnetic powder is attracted by the permanent magnets 11a are attached to the outer peripheral surface of the tubular member 21 is scraped when the magnet array 11 is moved to the position of non-braking state from the position of the braking state, the scraping member 71 .
[0054]
　Rail brake 100 may include a third columnar ferromagnetic bodies arranged along the outer surface of the portion 21c of the tubular member 21. Schematically shown in FIG. 8 an example of the structure of such a rail brake 100. Figure 8 shows a cross section perpendicular to the longitudinal direction. Columnar ferromagnetic body 81 is disposed along the longitudinal direction of the tubular member 21. Furthermore, the ferromagnetic body 81 is disposed at a position facing the third portion 21c. As the ferromagnetic body 81, it may be used one ferromagnetic body having a magnet array 11 equal to or greater than the length, a plurality of strong having a length corresponding to each of the permanent magnets 11a (e.g. equivalent length) it may be used as a magnetic material. By using the ferromagnetic body 81, it is possible to reduce the driving force required when the magnet array 11 starts to move from the position of the braking state to the position of non-braking state. Furthermore, as shown in FIG. 8, by placing a ferromagnetic body 81 in contact with the third portion 21c, it is possible to function as a member scraped ferromagnetic body 81.
Industrial Applicability
[0055]
　Eddy current rail brake according to the present invention is applicable to railway vehicle.
DESCRIPTION OF SYMBOLS
[0056]
　1 the rail
　10 magnet unit
　11 magnet array
　11a permanent magnet
　12 holding member
　13 holding plate
　14 rotary shaft
　21 cylindrical member
　21a first portion
　21b second portion
　21c the third portion
　31 drives
　51 frame
　51f ferromagnetic
　71 scraping member
　81 columnar ferromagnetic
　100, 100a, 100b rail brake

The scope of the claims
[Requested item 1]
　A eddy current rail brake for rail vehicles,
　a magnet array that includes a plurality of permanent magnets arranged in a row so as to face the rail in the braking state,
　a holding member for holding the magnet array, wherein a holding member rotatably supported with magnet row,
　and the cylindrical member that the magnets in the rotating cover over the entire longitudinal direction of the magnet array,
　at least one end of the holding member for rotating the magnet array comprising at least one drive device is connected to a part, and
　can be switched between a braking state and a non-braking state by rotating the magnet array, eddy current rail brake.
[Requested item 2]
　The holding member includes a holding plate made of ferromagnetic material a holding plate the magnet array is fixed, an eddy current rail brake according to claim 1.
[Requested item 3]
　Comprising a frame for supporting the holding member and the tubular member,
　at least, a portion facing at least a portion of the magnet array in the non-braking state of the frame is made of a ferromagnetic material, wherein eddy current rail brake according to claim 1 or 2.
[Requested item 4]
　Said ferromagnetic body, said in non-braking state, it is discontinuously arranged to at least face the regions between the said permanent magnets adjacent, eddy current rail brake according to claim 3.
[Requested item 5]
　Whole of the tubular member is made of a nonmagnetic material, an eddy current rail brake according to any one of claims 1-4.
[Requested item 6]
　At least a portion of said magnet rows facing parts in the braking state of said tubular member is made of a ferromagnetic material, said tubular member other than said portion is made of a nonmagnetic material, any one of claims 1 to 4, eddy current rail brake according to item 1.
[Requested item 7]
　It said portion made of ferromagnetic material, the is disposed at a position facing the permanent magnet in the braking state, an eddy current rail brake according to claim 6 in one of the tubular member.
[Requested item 8]
　It scraped further comprising a member, the scraping member, the magnet array when moving the the non-braking state from the braking state of the tubular member is disposed in contact with the outer surface of the portion that passes, claim 1 eddy current rail brake according to any one of 1-7.
[Requested item 9]
　Further comprising a columnar ferromagnetic, the columnar ferromagnetic material, the magnet array are arranged along the outer surface of the portion that passes from the braking state of the tubular member when moving the the non-braking state that, eddy current rail brake according to any one of claims 1-8.
[Requested item 10]
　Pole facing the rail in the braking state is different in the permanent magnets adjacent to each other, eddy current rail brake according to any one of claims 1-9.