JP2014015735A - Device and method for adjusting axial force of rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and method for adjusting an axial force of a rail, which enables efficient execution of work for adjusting the axial force of the rail, while suppressing work noise when adjusting the axial force of the rail.SOLUTION: A device for adjusting an axial force of a rail 2 configuring a railroad track includes a vibration generation unit 10 which generates vibrations for being applied to the rail 2, and a bracket 30 which is fixed to the vibration generation unit 10, which is disconnectably connected to the rail 2 and which transmits the vibrations, generated by the vibration generation unit 10, to the rail 2.

Description

  The present invention relates to a rail axial force adjusting device and a rail axial force adjusting method.

  Since the metal rail used for the track expands and contracts due to the surrounding environmental temperature, the axial force of the rail is managed in order to prevent problems due to the expansion and contraction. When the expansion and contraction of the rail is repeated based on the ambient temperature, the axial force of the rail may change from the initially set axial force. Therefore, it is necessary to periodically adjust the rail axial force. Further, the axial force of the rail is adjusted to a predetermined value when a new rail is installed or an old rail is replaced with a new rail. For example, when the rail is replaced, the rail axial force is such that a plurality of rollers are laid under the rail under a temperature environment lower than the set temperature, and both ends of the rail are pulled to extend the length of the rail at the set temperature. In this state, it is adjusted by fixing the rail.

Geismar (GEISMAR), [online], page 26, bottom, RailKnocker, [July 5, 2012 search], Internet <http://www.haratrading.fi/Geismar.pdf>

  However, if the rail is merely placed on the plurality of rollers, the amount of extension of the rail, that is, the axial force, is not uniform. Therefore, conventionally, in order to make the axial force uniform over the entire rail, an operator strikes the rail that has been extended by applying a pulling force with a wooden rod called a hanging arrow to vibrate the rail. . Non-Patent Document 1 describes a device that mechanically hits a rail.

  However, in the method in which the worker hits the rail using the hanging arrow, the hitting force hitting the rail and the hitting position vary. Furthermore, since the vibration caused by the impact is an impulse-like impact, a plurality of impacts may be required to make the axial force uniform. Furthermore, even when a device that mechanizes rail hitting is used, it is the same as the method of hitting the rail by an operator in terms of vibration by hitting, and in order to make the axial force uniform, multiple times are required. It takes a blow. Therefore, since it takes time to make the axial force of the entire rail uniform, it is difficult to efficiently adjust the axial force of the rail.

  Further, in the method of hitting the rail, a loud working sound is generated when the rail is hit. Since this working sound becomes a noise, it has been required to suppress the working sound generated during the adjustment of the rail axial force.

  Therefore, the present invention provides a rail axial force adjusting device and a rail axial force adjusting method capable of efficiently performing an adjustment operation of a rail axial force while suppressing a working noise when adjusting the rail axial force. The purpose is to provide.

  A rail axial force adjusting device according to the present invention is a device for adjusting the axial force of a rail constituting a railroad track, and generates a vibration applied to the rail, and is fixed to the vibration generating unit. And a clamp unit that is detachably connected to the rail and transmits the vibration generated by the vibration generating unit to the rail.

  According to the rail axial force adjusting device according to the present invention, it is possible to apply vibration generated by the vibration generating unit to the rail via the clamp unit connected to the rail. When vibration is applied to the rail, the rail slightly moves with respect to members such as a plurality of rollers supporting the rail. In a state where the rail is slightly moving with respect to a member such as a roller, the frictional force is smaller than in a state where the rail is in contact with the member such as a roller and is stationary. Therefore, when the rail is pulled, in a state where the axial force on the rail is not uniform, the rail axial force adjusting device according to the present invention applies vibration to the rail so that the roller and the like are separated from the rail. Therefore, the axial force of the rail can be adjusted uniformly. Furthermore, even if the rail is applied with vibration generated from the vibration generator and the axial force of the rail is adjusted, the loud hitting sound generated when hitting the rail is not generated. The working sound generated when adjusting the axial force can be suppressed.

  Further, according to the present invention, the vibration may include a vertical component of the rail. When this vibration is applied to the rail, the rail can be lifted in a wave shape with respect to the roller or the like. As a result, the state in which the axial force is unevenly distributed over the entire rail is eliminated, so that the axial force of the rail can be adjusted efficiently and uniformly.

  Further, according to the present invention, when the clamp portion is connected to the rail, the vibration generating portion can be disposed above the rail on a line that extends in the vertical direction of the rail and passes through the center of gravity of the rail. According to such an arrangement, the rail can be floated in a well-balanced manner in the vertical direction with respect to the roller or the like. As a result, the state in which the axial force is unevenly distributed over the entire rail is eliminated, so that the axial force of the rail can be adjusted more efficiently and uniformly.

  According to the present invention, the vibration generating unit includes a motor unit, a rotating shaft fixed to the motor unit, and a weight member that is eccentric to the rotating axis of the rotating shaft and fixed to the rotating shaft. be able to. Thus, according to the vibration source due to unbalanced vibration, the frequency of vibration and the exciting force can be easily controlled. Furthermore, vibration having a relatively large excitation force can be easily generated.

  In the present invention, the clamp portion can be connected to the rail by gripping both side surfaces of the rail. According to this structure, since a clamp part is connected with a rail, without a clamp part contacting the upper surface of the rail which contacts a wheel, the upper surface of a rail can be protected.

  According to the present invention, the clamp portion is provided so as to be movable in the direction of separation from the first member, the first member being in contact with the first side surface of the rail, and the first side surface of the rail. A second member abutting against the opposing second side surface, a first arm having one end pivotally supported by the first member, and one end pivotally supported by the second member, the other end Can have a second arm pivotally supported between one end of the first arm and the other end of the first arm. According to this configuration, the first arm is rotated by rotating the other end of the first arm in a direction away from the second member around the portion where the first arm is pivotally supported by the first member. Since the second member moves in the direction approaching the member, the rail is sandwiched between the first member and the second member. Thereby, a clamp part can be connected with a rail. On the other hand, the second member moves in a direction away from the first member by rotating the other end of the first arm in a direction opposite to the case where the clamp portion is connected to the rail. Thereby, a clamp part can be removed from a rail. Therefore, the adjustment device can be connected to the rail and released from the rail with a single operation by operating the first arm.

  The rail axial force adjusting method according to the present invention is a method of adjusting the rail axial force using any of the rail axial force adjusting devices described above, and adjusting the rail by connecting the clamp portion to the rail. A step of attaching the device, and a step of applying a vibration to the rail by generating a vibration by the vibration generating unit while the rail is pulled in the extending direction of the rail.

  According to the rail axial force adjusting method according to the present invention, after the rail axial force adjusting device is connected to the rail, the rail is pulled, and the vibration generating unit generates the vibration through the clamp unit connected to the rail. Apply vibration to the rail. When vibration is applied to the rail, the rail slightly moves with respect to members such as a plurality of rollers supporting the rail. In a state where the rail is slightly moving with respect to a member such as a roller, the frictional force is smaller than in a state where the rail is in contact with the member such as a roller and is stationary. Therefore, when the rail is pulled, in a state where the axial force on the rail is not uniform, the frictional force between the member such as the roller and the rail is applied by applying vibration to the rail by the rail axial force adjusting device. Therefore, the axial force of the rail can be adjusted uniformly. Furthermore, even if the rail is applied with vibration generated from the vibration generator and the axial force of the rail is adjusted, the loud hitting sound generated when hitting the rail is not generated. The working sound generated when adjusting the axial force can be suppressed.

  According to the present invention, there is provided a rail axial force adjusting device and a rail axial force adjusting method capable of efficiently performing an adjustment operation of a rail axial force while suppressing a working noise when adjusting the rail axial force. Provided.

It is a figure which shows roughly the structure which adjusts rail axial force using the rail axial force adjusting device which concerns on this embodiment. It is a figure which shows the state which connected the adjustment apparatus of the rail axial force shown in FIG. 1 to the rail. It is a figure which shows the vibration generation part of the adjustment apparatus of the rail axial force shown in FIG. It is a figure which shows the weight member of a vibration generation part. It is a figure which shows the state before connecting the adjustment apparatus of the rail axial force shown in FIG. 1 to a rail. It is a flowchart which shows the adjustment method of the rail axial force which concerns on this embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  First, an example of work in which the rail axial force adjusting device according to this embodiment is used will be described. The rail axial force adjusting device (hereinafter, also simply referred to as “adjusting device”) is a device for adjusting the axial force of a rail constituting a railroad track in rail exchange work, for example. FIG. 1 is a diagram schematically showing a configuration for adjusting rail axial force using a rail axial force adjusting device according to the present embodiment. In addition, the rail replacement | exchange in this embodiment includes the replacement | exchange from the fixed rail which has a length of 25 m or more and less than 200 m to the long rail which has a length of 200 m or more, and the replacement | exchange from a long rail to a long rail. The rail 2 according to the present embodiment includes a 50N rail, a 60K rail, and the like.

  When the rail replacement work is performed, a plurality of rollers 3 for supporting the rail 2 so as to be movable in the extending direction RD of the rail 2 is inserted under the rail 2. The plurality of rollers 3 are arranged on the sleepers 4. And the rail fixing device 5 for fixing the position of the one end part 2a is connected with the one end part 2a of the rail 2. As shown in FIG. On the other hand, a rail tensioner 6 for pulling the rail 2 is connected to the other end 2b of the rail 2 opposite to the one end 2a. A predetermined axial force is applied to the rail 2 by pulling the rail 2 to which the one end 2a is fixed by the rail tensioner 6 connected to the other end 2b, but this axial force is not uniform. Therefore, the axial force is equalized by the adjusting device 1 attached between the one end 2a and the other end 2b of the rail 2.

  The rail axial force adjusting device 1 according to this embodiment will be described. The adjusting device 1 includes a vibration generating unit 10 that generates a vibration to be applied to the rail 2, and a bracket 30 that is a clamp unit that is fixed to the vibration generating unit 10 and transmits the vibration generated by the vibration generating unit 10 to the rail 2. I have. The adjusting device 1 is connected to a power source 8 for driving the vibration generating unit 10 via the cable 7. The power source 8 can be a portable power generator or a commercial power source such as AC 100V or AC 200V.

  FIG. 2 is a view showing a side surface of the rail axial force adjusting device 1 and shows a state in which the adjusting device 1 is attached to the rail 2. FIG. 3 is a diagram showing the front of the rail axial force adjusting device 1 and shows the internal structure of the vibration generating unit 10. As shown in FIG. 3, the vibration generating unit 10 accommodates a case 11 having a substantially cylindrical shape for accommodating a motor unit to be described later, and weight members to be described later disposed on both ends of the case 11. Side cover 12. A connecting portion 13 for fixing the case 11 to the bracket 30 is provided at the lower portion of the case 11. The connecting portion 13 is fixed to the bracket 30 with bolts 14.

  The vibration generating unit 10 further includes a motor unit 15, a rotating shaft 16 fixed to the motor unit 15, and a weight member 17 fixed to the rotating shaft 16. In FIG. 3, the internal structure of the vibration generating unit 10 is shown by breaking the case 11 and the side cover 12 on the right side of the vibration generating unit 10. The left interior of the vibration generator 10 shown in FIG. 3 has the same configuration as the right side of the vibration generator 10.

  The motor unit 15 is disposed substantially at the center of the case 11, and the rotating shaft 16 extends from both sides of the motor unit 15. The motor unit 15 can adopt a known configuration, and for example, generates a rotational speed of 100 to 240 revolutions per second. The rotating shaft 16 is rotatably supported by a bearing 18, and the distal end portion 16 a extends to the inside of the side cover 12.

  FIG. 4 is a diagram illustrating a side surface of the weight member 17 of the vibration generating unit 10. As shown in FIG. 4, the weight member 17 includes a fixed weight 19 and an adjustment weight 21 that can adjust a deviation angle θ with respect to the fixed weight 19. The fixed weight 19 and the adjustment weight 21 have a fan shape when viewed from the side. The fixed weight 19 fixed to the rotating shaft 16 is disposed on the side close to the motor unit 15. The adjustment weight 21 provided so that the rotation angle can be adjusted with respect to the rotating shaft 16 is disposed on the side far from the motor unit 15, that is, on the side close to the distal end portion 16a of the rotating shaft 16 (see FIG. 3).

  The edge portions 19a and 21a of the fixed weight 19 and the adjustment weight 21 are formed in an arc shape. Holes 19b and 21b for fixing the rotating shaft 16 to the fixed weight 19 and the adjustment weight 21 are provided so as to coincide with the center positions of the edge portions 19a and 21a, respectively. In the fixed weight 19 and the adjustment weight 21 having such a shape, the center of gravity of each weight is shifted from the holes 19b and 21b. Accordingly, the center of gravity of the fixed weight 19 and the adjustment weight 21 which are rotating bodies are deviated from the center of rotation, so that the unbalanced state is obtained.

  The operation of the vibration generator 10 will be described. In the vibration generating unit 10 having the above-described configuration, since the rotation axis A2 of the rotation shaft 16 does not pass through the center of gravity of the fixed weight 19 and the adjustment weight 21, the fixed weight 19 and the adjustment weight with respect to the rotation axis A2 of the rotation shaft 16. 21 is fixed eccentrically. When the fixed weight 19 and the adjustment weight 21 are rotated, the center of gravity of the fixed weight 19 and the adjustment weight 21 that are rotating bodies is deviated from the rotation axis A2, so that the frequency according to the angular velocity of the rotation shaft 16 and Vibrations according to the mass of the fixed weight 19 and the adjustment weight 21, the distance from the rotation axis A2 to the center of gravity, and the centrifugal force according to the angular velocity of the rotation shaft 16 are generated. In the vibration generating unit 10 of the present embodiment, for example, a vibration with a frequency of 100 Hz to 240 Hz and a centrifugal force of 0.69 kN to 2.75 kN is generated.

  In the weight member 17 of the present embodiment, the unbalance amount can be changed by adjusting the deviation angle θ of the adjustment weight 21 with respect to the fixed weight 19, so that the centrifugal force can be set to a desired value. it can. For example, the largest centrifugal force can be obtained when the deviation angle between the fixed weight 19 and the adjustment weight 21 is set to 0 degree. When the deviation angle between the fixed weight 19 and the adjustment weight 21 is increased, the centrifugal force is reduced.

  As shown in FIG. 2, the bracket 30 for attaching the adjusting device 1 to the rail 2 is fixed to the lower surface of the connecting portion 13 of the vibration generating portion 10. According to such an arrangement, the vibration generating unit 10 is arranged above the rail 2, and the bracket 30 is arranged between the vibration generating unit 10 and the rail 2.

  When the bracket 30 is attached to the rail 2, the first member 31 that abuts against the head side surface (first side surface) 2d of the rail 2 and the head side surface facing the head side surface 2d ( A second member 32 abutting against the second side surface 2e. The second member 32 is provided so as to be movable in the contact / separation direction with respect to the first member 31. In addition, the side surface in this embodiment means the head side surfaces 2d and 2e in the head 2h of the rail 2, and these are referred to as both side surfaces.

  The first member 31 and the second member 31 are arranged so as to sandwich the rotation axis A2 in plan view. Then, the contact portion 31a of the first member 31 is separated from the line extending through the rotation axis A2 in the vertical direction of the adjustment device 1 in a side view and opposite to the second member 32, with respect to the rotation axis A2. Extending in parallel. Further, the abutting portion 32a of the second member 32 is spaced apart from a line extending through the rotation axis A2 in the vertical direction of the adjustment device 1 in a side view and opposite to the first member 31, and with respect to the rotation axis A2. Extending in parallel. According to such a configuration, when the adjusting device 1 is attached to the rail 2, the contact portions 31 a and 32 a are arranged substantially parallel to the head side surfaces 2 d and 2 e of the rail 2. Further, since the contact portions 31a and 32a extend in parallel to the rotation axis A2, the direction of the rotation axis A2 and the extending direction RD of the rail 2 coincide.

  Further, the first member 31 is fixed to the connecting portion 13 of the vibration generating unit 10. For this reason, the distance from rotation axis A2 to contact part 31a is constant. This distance is the same length as the distance from the head side surface 2d of the rail 2 to the line A1 passing through the center of gravity of the rail 2. For this reason, as shown in FIG. 2, when the adjusting device 1 is attached to the rail 2, the vibration generating unit 10 extends in the vertical direction of the rail 2 and passes the rail 2 on the line A <b> 1 passing through the center of gravity of the rail 2. Is disposed above. The line A1 of this embodiment passes through the center in the width direction of the head 2h of the rail 2. In more detail, the adjusting device 1 is disposed above the rail 2 so that the rotation axis A2 of the rotation shaft 16 of the vibration generating unit 10 intersects the line A1.

  According to the bracket 30 having the first member 31 and the second member 32 described above, when the adjustment device 1 is attached to the rail 2, the direction of the rotation axis A2 and the extending direction RD of the rail 2 coincide. (See FIG. 3). And according to the vibration generation part 10, the vibration of the direction orthogonal to rotation axis A2 is generate | occur | produced. Therefore, the exciting force of any direction component orthogonal to the extending direction RD of the rail 2 is applied to the rail 2. For example, the excitation force includes a directional component that acts in the vertical direction of the rail 2, the horizontal direction of the rail 2, and the like. Among these, the direction component of the exciting force acting in the vertical direction of the rail 2 contributes most to the uniformization of the rail axial force. Here, the vertical direction of the rail 2 refers to the direction in which the bottom surface 2c of the rail 2 that contacts the sleepers 4 and the head upper surface 2t of the rail 2 that contacts the wheels (not shown) of the vehicle face each other.

  The contact portions 31a and 32a are made of a metal material such as S45C, which is structural carbon steel. In this way, the vibration generated in the vibration generating unit 10 is obtained by holding the rail 2 by directly contacting the first member 31 and the second member 32 with the rail 2 without using a member such as rubber. Can be transmitted to the rail 2 without being attenuated.

  At both ends of the first member 31 and the second member 32 in the rotational axis A2, a mechanism including a first arm 33 and a second arm 34 is provided (see FIG. 3).

  The first arm 33 is a flat plate member extending in one direction. One end 33 a of the first arm 33 is pivotally supported by the first member 31. The rotation center 33b of the first arm 33 is disposed on a line A1 that passes through the center of gravity of the rail 2 when the contact portion 31a contacts the head side surface 2d.

  The second arm 34 is a rod-like member having a mechanism (not shown) that can adjust the length between the one end 34a and the other end 34c. One end 34a of the second arm 34 is pivotally supported by the second member 32, and the rotation center 34b with respect to the second member 32 is separated in the direction opposite to the first member 31 with respect to the line A1. Has been placed. The other end 34 c of the second arm 34 is pivotally supported between one end 33 a and the other end 33 c of the first arm 33.

  Between the first arm 33 provided at one end of the rotation axis A2 of the first member 31 and the first arm 33 provided at the other end of the rotation axis A2 of the first member 31. A handle 35 is provided. The handle 35 is integrated so as to integrally rotate the pair of first arms 33 so as to be close to the second member 32, and to separate the pair of first arms 33 from the second member 32. To perform the rotating operation.

  FIG. 5 is a view showing a state before the rail axial force adjusting device 1 is connected to the rail 2. When the handle 35 is rotated toward the first member 31, the other end 34 c of the second arm 34 that is pivotally supported by the first arm 33 moves toward the first member 31. Since the second arm 34 is a member having a certain length, the second member 32 that pivotally supports the one end 34a of the second arm 34 is moved along with the movement of the other end 34c. To contact the head side surface 2e of the rail 2. Therefore, as shown in FIG. 2, since the head 2 h of the rail 2 is sandwiched between the first member 31 and the second member 32, the bracket 30 is fixed to the head 2 h of the rail 2. When the handle 35 is rotated to a predetermined position, the rotation positions of the first arm 33 and the second arm 34 are held by a lock mechanism (not shown). Therefore, the bracket 30 can be securely fixed to the rail 2.

  On the other hand, when the handle 35 is rotated to the second member 32 side, the other end 34c of the second arm 34 moves to the second member 32 side. Since the second arm 34 is a member having a certain length, the second member 32 that pivotally supports the one end 34a of the second arm 34 is moved along with the movement of the other end 34c. Move away from the direction. This movement creates a gap between the head side surface 2e of the rail 2 and the contact portion 32a of the second member 32, so that the bracket 30 can be removed from the rail 2.

  Next, a method for adjusting the rail axial force using the rail axial force adjusting device 1 will be described. As shown in FIG. 6, the adjustment of the rail axial force performed at the time of rail replacement will be described as an example. First, an old rail to be replaced is removed and the rail 2 is placed at a predetermined position. Subsequently, the rail fixing device 5 is connected to the one end 2a side of the rail 2, and the rail tensioner 6 is connected to the other end 2b side (step S1).

  Further, the adjusting device 1 is attached to the rail 2 (step S2). More specifically, first, the handle 35 is rotated to the second member 32 side (see FIG. 5). By this operation, the second member 32 is separated from the first member 31, and the head of the rail 2 is interposed between the contact portion 31 a of the first member 31 and the contact portion 32 a of the second member 32. A gap larger than the width of the portion 2h is formed. Subsequently, the adjusting device 1 is placed on the head 2 h of the rail 2 from above. Then, the contact portion 31a of the first member 31 is disposed at a position facing the head side surface 2d of the rail 2, and the contact portion 32a of the second member 32 is disposed at a position facing the head side surface 2e. The At this time, when the head side surface 2 d is brought into contact with the contact portion 31 a of the first member 31, the rotation axis A <b> 2 in the vibration generating unit 10 is disposed on the line A <b> 1 passing through the center of gravity of the rail 2. Further, a gap is formed between the head side surface 2 e and the contact portion 32 a of the second member 32. Then, when the handle 35 is tilted to the first member 31 side, the second member 32 moves in the direction contacting the first member 31 side, that is, the head side surface 2e. Both side surfaces are sandwiched between the contact portions 31a and 32a. Then, the cable 7 of the adjusting device 1 is connected to the power source 8.

  In step S2, one or a plurality of adjusting devices 1 are arranged so that there is no section in the rail 2 where no vibration is transmitted. For example, the adjusting device 1 can transmit vibration to a position separated by 0 m to 400 m with reference to the position where the adjusting device 1 is attached. Moreover, the vibration generated in the adjusting device 1 attached to the rail 2 is transmitted to both sides from the position where the adjusting device 1 is attached. Therefore, according to the length from the rail fixing device 5 to the rail tensioner 6, for example, the adjusting device 1 is arranged above the rail 2 at an interval of 100 m to 800 m. As an example, the adjusting device 1 is arranged at an interval of 800 m, for example. Note that a part of a section in which vibration of one adjusting device 1 is transmitted may overlap with a part of a section in which vibration of another adjusting device 1 is transmitted.

  Further, the roller 3 is inserted between the rail 2 and the sleepers 4 (step S3).

  Thereafter, the rail tensioner 6 is operated to apply tension to the rail 2 to tension the rail 2 until the other end 2b of the rail 2 reaches a preset extension amount (step S4). At this time, the amount of extension of each part of the rail 2 is calculated based on the difference between the set temperature and the temperature of the rail at the time of rail replacement work, and the position of each part of the rail when the rail 2 uniformly extends in the vicinity of the rail 2 There are several places to show the mark.

  Here, the roller 3 is provided in order to reduce the resistance in the support portion of the rail 2 and make the extension amount of the rail 2 uniform. However, it is difficult to obtain sufficient uniformity with the roller 3 alone, and the extension amount of the rail 2 is unevenly distributed at the end of step S4. In this state, the extension amount of the other end 2b of the rail 2 extends to a preset extension amount, but the extension amount of each part of the rail 2 from the one end 2a to the other end 2b is There are cases where the position of the mark provided in the vicinity does not match.

  Therefore, the vibration is generated by the vibration generator 10 of the adjustment device 1 to vibrate the rail 2 (step S5). When the rail 2 is vibrated, the amount of extension of the rail 2 is made uniform, and the amount of extension of each part of the rail 2 approaches the position of the mark provided in the vicinity of the rail 2. Then, when it is confirmed that the extension amount of the rail 2 satisfies the set extension amount, the roller 3 is removed (step S6), and the rail 2 is fixed to the sleeper 4 (step S7). Note that the determination as to whether or not the amount of extension of the rail 2 has been made uniform is made by visually observing the rail 2 and the mark provided in the vicinity of the rail 2 as described above. The determination as to whether or not the amount of extension of the rail 2 has been made uniform may be made based on the excitation time during which vibration is applied.

  Subsequently, the rail axial force adjusting device 1 is removed from the rail 2 (step S8). More specifically, first, the connection between the cable 7 and the power supply 8 of the adjustment device 1 is released. Subsequently, the handle 35 is rotated in the direction approaching the second member 32 from the position of the handle 35 shown in FIG. By this operation, the second member 32 is separated from the head side surface 2e of the rail 2, and a gap is formed between the head side surface 2e and the contact portion 32a of the second member 32 (see FIG. 5). . Then, the adjusting device 1 is pulled up above the rail 2 to remove the adjusting device 1 from the rail 2.

  Subsequently, the rail tensioner 6 is removed from the other end 2b of the rail 2, and the rail fixture 5 is removed from the one end 2a of the rail 2 (step S9). Through the above steps, the rail 2 replacement work is completed.

  Thus, according to the rail axial force adjusting device 1 and the rail axial force adjusting method according to the present embodiment, the vibration generated in the vibration generating unit 10 via the bracket 30 connected to the rail 2 is applied to the rail 2. Can be applied. When vibration is applied to the rail 2, the rail 2 slightly moves with respect to the plurality of rollers 3 that support the rail 2. When the rail 2 is slightly moving with respect to the roller 3, the frictional force is smaller than when the rail 2 is in contact with the roller 3 and is stationary. Therefore, when the rail 2 is pulled, the friction force between the roller 3 and the rail 2 is reduced by applying vibration to the rail by the adjusting device 1 in a state where the axial force in the rail 2 is uneven. Therefore, the axial force of the rail 2 can be adjusted uniformly. Furthermore, since the rail axial force can be properly managed, it is possible to suppress the occurrence of rail overhang that may occur in summer and rail breakage that may occur in winter.

  Further, even if the vibration generated from the vibration generating unit 10 is applied to the rail 2 and the axial force of the rail 2 is adjusted, a large hitting sound generated when hitting the rail 2 is not generated. It is possible to suppress the working sound that is generated when adjusting the axial force of the rail 2 as compared with the case of doing so.

  By the way, the head upper surface 2t of the rail 2 is a surface that comes into contact with the wheel and needs to be protected from scratches and the like. For this reason, in the method of hitting the rail 2 and equalizing the rail axial force, the head side surfaces 2d and 2e of the rail are hit with the hanging arrows or the like instead of the head top surface 2t of the rail 2. Therefore, when hitting the rail 2, a lateral impact is applied to the rail 2. When the rail 2 is moved with respect to the roller 3, a state in which the rail 2 is moved in the vertical direction with respect to the roller 3 is more preferable than a state in which the rail 2 is moved in the horizontal direction with respect to the roller 3. On the other hand, in the rail axial force adjusting device 1 according to the present embodiment, the vibration includes a component in the vertical direction (vertical direction) of the rail 2. When this vibration is applied to the rail 2, the rail 2 can be lifted in a wave shape with respect to the roller 3, so that the axial force of the rail 2 can be adjusted efficiently and uniformly.

  Further, in the rail axial force adjusting device 1 according to the present embodiment, when the bracket 30 is coupled to the rail 2, the vibration generating unit 10 extends in the vertical direction of the rail 2 and passes through the center of gravity of the rail 2. It is arranged above the upper rail 2. According to such an arrangement, the rail 2 can be floated in a well-balanced manner in the vertical direction with respect to the roller 3. Thereby, since the state where the axial force is unevenly distributed in the rail 2 is eliminated, the axial force of the rail 2 can be adjusted more efficiently and uniformly.

  Further, in the rail axial force adjusting device 1 according to the present embodiment, the vibration generating unit 10 is biased with respect to the motor unit 15, the rotating shaft 16 fixed to the motor unit 15, and the rotating axis A2 of the rotating shaft 16. And a weight member 17 fixed to the rotating shaft 16. Thus, according to the vibration source due to unbalanced vibration, the frequency of vibration and the exciting force can be easily controlled. Furthermore, vibration having a relatively large excitation force can be easily generated.

  In addition, the rail axial force adjusting device 1 according to the present embodiment is attached to the rail 2 by the bracket 30 gripping the head side surfaces 2 d and 2 e of the rail 2. According to this configuration, the bracket 30 is connected to the rail 2 without contacting the bracket 30 with the head top surface 2t of the rail 2 that contacts the wheel, so that the head top surface 2t of the rail 2 can be protected. .

  Further, in the rail axial force adjusting device 1 according to the present embodiment, the first member 31 is pivotally supported in the direction away from the second member 32 with the portion where the first arm 33 is pivotally supported as the rotation center 33b. By rotating the other end 33 c of one arm 33, the second member 32 moves in a direction approaching the first member 31, and the first member 31 and the second member 32 move together. The rail 2 is clamped. Thereby, the bracket 30 can be connected to the rail 2. On the other hand, the second member 32 is moved away from the first member 31 by rotating the other end 33c of the first arm 33 in the opposite direction to the case where the bracket 30 is connected to the rail 2. Moving. Thereby, the bracket 30 can be removed from the rail 2. Therefore, the adjustment device 1 can be attached to and detached from the rail 2 with one touch by operating the first arm 33.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment.

  For example, the adjusting device 1 is configured such that the direction of the rotation axis A2 is inclined by a predetermined angle with respect to the extending direction RD of the rail 2 without the direction of the rotating axis A2 and the extending direction RD of the rail 2 being coincident. 1 may be attached to the rail 2. According to such a configuration, the direction of vibration applied to the rail 2 can be set to a desired direction.

  Moreover, the vibration generation part 10 is not limited to the vibration source by imbalance, You may use another vibration source.

  Moreover, in the said embodiment, the adjustment operation | work of the rail axial force in a rail exchange operation was demonstrated to the example. The present embodiment is not limited to the adjustment of the rail axial force in the rail replacement operation, and can be used for the adjustment of the rail axial force in the rail setting change operation, for example. Since the range of the rail axial force adjustment work is wide in the rail setting change work, many workers are required in the method of equalizing the rail axial force due to impact. On the other hand, according to the rail axial force adjusting method using the rail axial force adjusting device 1, an operator for striking the rail 2 becomes unnecessary, and therefore the rail axial force adjusting operation is performed with a small number of people. Can do. Therefore, the time required for the rail setting change work can be shortened and the cost can be reduced.

  Moreover, the rail axial force adjusting method of the present embodiment may be performed by performing the step S5 of equalizing the extension amount of the rail 2 by the adjusting device 1 after performing the step S4 of tensioning the rail 2 at least. The order of the other steps S1 to S3 and S6 to S9 is not particularly limited, and may be performed in any order.

[Example 1]
The distance to which the vibration applied to the rail 2 is transmitted by the rail axial force adjusting device 1 was confirmed. In Example 1, vibration having a frequency of 240 Hz and a centrifugal force of 2.75 kN was applied to the rail 2 by the vibration generator 10. As a result, it was confirmed that vibration was transmitted to the position of 400 m from the adjusting device 1 as a starting point. According to this result, it was found that, for example, by arranging the adjusting device 1 every 800 m, vibration can be transmitted to the entire rail 2.

[Example 2]
Using the rail axial force adjusting device 1, the rail setting was changed. In this embodiment, one adjusting device 1 is connected to a rail having a straight portion of 400 m, and the axial force is adjusted by applying vibration having a frequency of 240 Hz and a centrifugal force of 2.75 kN to the rail. . As a result, the rail axial force could be made uniform by applying a vibration of about 1 to 2 minutes.

DESCRIPTION OF SYMBOLS 1 ... Rail axial force adjustment apparatus, 2 ... Rail, 2d ... Head side surface (1st side surface) 2e ... Head side surface (2nd side surface) 10 ... Vibration generating part, 15 ... Motor part, 16 ... Rotating shaft, 17 ... weight member, 30 ... bracket (clamp part), 31 ... first member, 32 ... second member, 33 ... first arm, 34 ... second arm, A1 ... center of gravity of rail A passing line, A2 ... rotation axis, S2 ... a step of attaching an adjusting device, S5 ... a step of applying vibration to the rail.

Claims (7)

A device for adjusting the axial force of a rail constituting a railway track,
A vibration generating section that generates vibration applied to the rail;
A clamp unit fixed to the vibration generating unit and detachably connected to the rail, and transmitting the vibration generated by the vibration generating unit to the rail;
Comprising
Rail axial force adjustment device. The vibration includes a vertical component of the rail,
The rail axial force adjusting device according to claim 1. When the clamp part is coupled to the rail, the vibration generating part is disposed above the rail on a line extending in the vertical direction of the rail and passing through the center of gravity of the rail.
The rail axial force adjusting device according to claim 2. The vibration generating unit includes a motor unit, a rotating shaft fixed to the motor unit, and a weight member eccentrically fixed to the rotating shaft and fixed to the rotating shaft.
The rail axial force adjusting device according to any one of claims 1 to 3. The clamp portion is connected to the rail by gripping both side surfaces of the rail.
The rail axial force adjusting device according to any one of claims 1 to 4. The clamp part is
A first member in contact with a first side surface of the rail;
A second member provided so as to be movable in a direction of separation from the first member, and abutted against a second side surface of the rail facing the first side surface;
A first arm whose one end is pivotally supported by the first member;
A second arm whose one end is pivotally supported by the second member and whose other end is pivotally supported between the one end of the first arm and the other end of the first arm;
Having
The rail axial force adjusting device according to any one of claims 1 to 5. A method for adjusting the axial force of a rail using the rail axial force adjusting device according to any one of claims 1 to 6,
Connecting the clamp part to the rail and attaching the adjusting device to the rail;
Generating vibration by the vibration generating unit in a state in which the rail is pulled in the extending direction of the rail, and applying vibration to the rail;
Having
Adjustment method of rail axial force.

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