JP6655432B2 - Railway rail lifting equipment - Google Patents

Description

  The present invention removes a rail fastening device and replaces a rail, which is a track portion of a railroad track, a rubber pad inserted between a rail and a slab or a floor slab, and lifts or lowers the rail. Railway rail lifting device for

  Conventionally, the track portion of a railway line is made of crushed stone called ballast on the ground to form a trackbed, pillows are arranged thereon, and two rails are further placed thereon at a predetermined interval, and a fastening device (fastener) is used. In recent years, rails have been adopted to fix rails to sleepers. Track structures such as slab tracks, in which ballast roadbeds are replaced with concrete floor slabs and rails are fixed directly to them, for the purpose of labor saving and maintenance of track maintenance work, tend to be frequently used. However, since the slab track has less cushioning property than the ballast track, it is necessary to insert a rubber track pad for absorbing vibration between the rail and the floor slab. The rails and track pads are both consumable parts associated with train operation and need to be replaced every predetermined period.

  In order to replace the rail or the track pad, it is necessary to remove the fastening device and lift the rail. Even if only one track pad is replaced, it is difficult to lift only one location, and a plurality of locations must be lifted back and forth.

  Conventionally, to lift a rail, a gate-shaped frame called "Yamagoshi" was installed across the rails, and then the rail was lifted using a chain block, etc. The work was rather large because it was a large, heavy object.

  Patent Literature 1 proposes a work method in which a small screw jack having a roller for lifting the head of the rail at the tip is installed on both sides of the rail, and the rail is lifted while the jacks on both sides are coordinated. However, with this method, it is necessary to operate the jacks on both sides in a well-balanced manner, so the work is unstable and in addition to lifting the neck of the rail, if the jack is installed close to the rail and the bottom of the rail hits the jack There is a problem that it can only be lifted to an undesired height.

  Patent Literature 2 discloses a rail lifting jack in which a hydraulic jack is installed beside a rail and the bottom of the rail is cantilevered. However, foot-operated hydraulic jacks are large, so there are many places where it is difficult to install them beside the rails, and since there are fastening devices and the like, there is an obstacle to work performed near the rails.

  Patent Literature 3 describes an idea of inserting a rubber bag into the lower surface of a rail and sending compressed air into the rubber bag to lift the rail. However, the rail contact surface is limited to the width of the rail bottom. It is not feasible to secure the area required to lift a vehicle.

Japanese Patent Publication No. 2009-501854 JP 08-109602 A JP-A-10-245199

  The present invention solves the problems of the above-described conventional techniques and various proposals, is thin and easy to insert into the lower part of the rail, is easy to carry, is lightweight, and does not disturb the surrounding work. It is another object of the present invention to realize a railroad rail lifting device capable of easily lifting and lowering a rail with human power.

  According to the first aspect of the present invention, an arm attached to a rotating shaft, a plurality of rollers rotatably attached to different positions in the longitudinal direction of the arm, and the arm rotated by the rotating shaft or the arm. A rail lifting mechanism capable of connecting an operating rod for mounting to a base plate having a bearing for supporting the rotating shaft, and connecting the operating rod to the rotating shaft or arm to rotate the rotating shaft. A railway rail lifting device capable of raising and lowering a rail by the rollers, wherein the plurality of rollers are attached to a position closer to the upper surface of the arm as the roller is closer to the rotation axis when the arm is horizontally inclined. A railway rail lifting device characterized in that it is used.

  According to a second aspect of the present invention, the arm includes a pair of arms attached to the rotating shaft such that an inner space is wider than a width of a bottom of the rail, and the pair of arms includes The railroad rail lifting device according to claim 1, wherein the roller can be inserted below a bottom of the rail when the rail is in a horizontal posture.

  According to a third aspect of the present invention, when the base plate is placed on the rail mounting floor slab of the slab track, the end of the base plate is fitted to the base of the rail fastening device. 3. The railway rail lifting device according to claim 1, wherein a fitting claw is provided on the portion.

  According to a fourth aspect of the present invention, there is provided a cam arm which is attached to the rotating shaft so as to protrude outward in a radial direction of the rotating shaft and has a distal end outer circumferential surface as a cam surface, and is slidably contacted with the cam surface. And a damper attached to the base plate so as to generate a resistance to an operation in which the slide piece is pushed in, wherein the cam surface has a configuration in which the roller lifts the rail. When the cam arm rotates with the rotary shaft from the state where the cam arm rotates with the rotary shaft to the position where the roller lowers the rail, the slide piece is gradually pressed into the damper. The railroad rail lifting device according to any one of claims 1 to 3, wherein:

  Furthermore, the present invention according to claim 5, wherein the rotation of the arm in a direction parallel to the longitudinal direction of the arm at a position inside at least one arm of the pair of arms and at a position closer to the tip end of the arm than the roller. 5. The railroad rail lifting device according to claim 2, further comprising a vertical roller having a central axis.

  According to the present invention, a plurality of rollers rotatably mounted at different positions in the length direction of the arm are mounted closer to the upper surface of the arm as the roller is closer to the rotation axis in a state where the arm is horizontally inclined. Therefore, the force at the initial stage of lifting is reduced, and the required height can be lifted with a small burden. In addition, it is a thin shape that can be easily inserted at the bottom of the rail and is lightweight that is easy to carry, and does not hinder the surrounding work, realizing a rail rail lifting device that can easily lift and lower the rail from directly below, It has an excellent effect that work safety and workability are greatly improved.

  According to the fourth aspect of the present invention, when the rails and pads are replaced and the rail is lowered to its original height, the cam arm rotates together with the rotating shaft, and the cam surface, which is the outer peripheral surface of the tip of the cam arm, Push the slide piece into the damper. By the resistance force from the damper against the pushing of the slide piece, the rotation of the rotating shaft, that is, the rotation of the arm on which the rail is mounted is suppressed, and as a result, the rail suddenly "falls" due to its own weight. The situation can be prevented and the rail can be lowered gradually.

  Further, according to the present invention as set forth in claim 5, when the rail is cut or sent in the vertical direction for replacement, the side surface at the bottom of the rail comes into contact with the vertical roller and the vertical roller is rotated, so that the vertical roller is rotated. The resistance to the feed is reduced, and as a result, for example, there is an effect that the rail can be smoothly fed even in a curved portion having an inclination.

  There is a restriction that this kind of track maintenance work must be completed completely within a very restricted time from the passage of the last train to the passage of the first train, and by using the railway rail lifting device of the present invention, In fact, an efficiency improvement of nearly 70% was observed.

It is a perspective view showing the railroad rail lifting device of the example of the present invention. It is a perspective view showing the bedplate of the railroad rail lifting device of the example of the present invention. It is a front view showing the railroad rail lifting device of the example of the present invention. It is a top view which shows the state which attached the base plate of the railroad rail lifting apparatus of the Example of this invention to the tie plate part on a slab. It is a front view showing the arm of the railroad rail lifting device of the example of the present invention. It is sectional drawing of the arm and roller part of the railroad rail lifting apparatus of this invention Example. It is an explanatory view showing a role of an arm of a railroad rail lifting device of an example of the present invention. It is a perspective view which shows the railroad rail lifting apparatus of the 2nd Example of this invention. It is a perspective view showing the state where a rail is lifted by the railroad rail lifting device of a 2nd example of the present invention. It is a perspective view showing the state where a rail is lifted similarly by a railroad rail lifting device of a 2nd example of the present invention. It is explanatory drawing which shows the effect | action of the damper in the railroad rail lifting apparatus of the 2nd Example of this invention.

  Hereinafter, two embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a state before using the railway rail lifting device of the embodiment. The railroad rail lifting device includes a pair of arms 2a and 2b mounted on a single rotating shaft 1 at equal angles so that an inner space is wider than a rail bottom width, and the pair of arms 2a and 2b. And two rollers 3a, 3b rotatably mounted at different positions in the longitudinal direction of the arms, and a pair of arms 2a, 2b of the rotation shaft for rotating the arms outside the respective pairs. A railroad rail lifting mechanism comprising two pipes 4a and 4b capable of connecting (inserting) the operation rod is mounted on a base plate 6 having a bearing 5 supporting the rotary shaft 1. . As shown in this figure, the entire device is flat before use, and is designed to have a height within the gap between the slab and the rail, for example, 29.5 mm or less, so that it can be inserted under the rail.

  FIG. 2 is a perspective view showing the base plate 6 of the railway rail lifting device of the embodiment. The base plate 6 has an elongated plate shape, and a bearing 5 for rotatably supporting the rotary shaft 1 is provided at a center portion thereof, and the base plate 6 is mounted on both ends of the slab track rail mounting floor slab. In the state, the fitting claws 61a and 61b are provided so that the base plate 6 is fitted to the tie plate T which is the base of the rail fastening device. Protrusions 62a and 62b are formed at positions corresponding to the arms 2a and 2b on the inner side.

  FIG. 3 is a front view of the railway rail lifting device of the embodiment. As shown in FIG. 1, the pair of arms 2a and 2b and the two tubes 4a and 4b are fixed to one rotating shaft 1, and all can rotate around the rotating shaft 1 at the same angle. By inserting the operation rod into the tube bodies 4a and 4b on both sides and raising it in the direction of the arrow in this figure, the arms 2a and 2b having the same phase are also raised.

  FIG. 4 is a plan view showing a state where the base plate 6 of the railway rail lifting device of the embodiment is fitted to the tie plate T on the slab S. A rubber track pad P is laid directly below the center rail of the tie plate. The tie plate T is fixed to the slab by a plurality of bolts B. Note that the fasteners for fastening the rails are not shown as having already been removed.

  FIG. 5 is a front view showing the arm 2 of the embodiment. A hole 21 through which the rotating shaft 1 passes, and holes 22 and 23 for rotatably supporting the two rollers 3a and 3b are provided. The holes 22 and 23 are provided at positions closer to the upper surface of the arms 2a and 2b as the arm 2 in FIG. I have.

  FIG. 6 is a cross-sectional view showing the arm 2 and the roller 3 of the embodiment, and is cut along a plane along the central axis of the roller 3a or the roller 3b and viewed from the direction of the rotating shaft 1. The roller 3 may be configured such that the support shaft portions at both ends and the inner roller portion are integrated. However, as shown in this figure, the roller 3 is divided into a shaft 31 penetrating the entire length and a cylindrical body 32 fitted to the shaft 31. When the shape 32 is divided into 32a and 32b in the length direction, the cylindrical body smoothly rotates even when the bottom surface of the rail is not uniformly in contact with the rollers when the rail is moved. .

  The use state of the railway rail lifting device of the present embodiment will be described with reference to FIG. The two rollers 3a and 3b are attached to a position closer to the rotating shaft 1 when the arm 2 is inclined horizontally, that is, the roller 3a is attached to a position closer to the upper surface of the arm 3 than the roller 3b. FIG. 7A shows a state in which the device is inserted into the lower part of the rail R and the arm is slightly raised. At this stage, the roller 3a at a high position lifts the rail R. Since a large force is required at first, it is effective that the roller 3a, which is a lever and has a small rotation radius of the arm, lifts the rail. When the angle of the arm increases, the state shown in FIG. 7B is reached, and the support of the rail R is replaced by the roller 3b. Since the roller 3b is far away from the rotation axis, the height of the rail R supported by the roller 3b is increased, and a wide rear is formed below the rail R, so that a sufficient working space can be secured.

  In order to further maintain the lifted state for a while, the angle is further increased to 90 degrees or more so as to hit the inclined surfaces 63a and 63b of the projections 62a and 62b5 of the base plate 6 as shown in FIG. It will be stable.

  It should be noted that the inclined surfaces 63a and 63b are not limited to the arm 2 itself, but may be another member that rotates integrally with the arm 2. In the embodiment shown in FIG. 1, the position of the convex portion 62 corresponds to the root portion of the tube 4 connecting the bar.

  For example, if the distance between the roller 3a and the rotating shaft 1 is 50 mm and the distance between the roller 3b and the rotating shaft 1 is 90 mm, the stage of FIG. 7A is 50/50 compared to the stage of FIG. 90, or 56% force.

  Lifting can be performed by human power, but mechanical power can also be used.

  The weight of the railway rail lifting device of the illustrated embodiment is about 4.0 kg per unit, and it is small and lightweight, so that it is easy to carry, insert and take out, and the workability is extremely good.

  Since the tube 4 is for rotating the arm 2, the tube 4 may be fixed to the side surface of the arm 2 instead of being attached to the rotating shaft 1. You may make it operate.

  When the railway rail lifting device of the present invention is used, the rail R is supported by the freely rotatable roller 3b in the state shown in FIG. 7 (c). There is also an effect that it can be easily moved in the direction.

  FIG. 8 is a perspective view showing a railroad rail lifting device according to a second embodiment of the present invention, FIG. 9 is a perspective view of a state where a rail is lifted by the railroad rail lifting device of the second embodiment, viewed from the side of the rail, FIG. 10 is a perspective view of a state in which the rail is lifted by the rail lift device of the second embodiment, viewed from the rail length direction. Portions common to the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the railroad rail lifting device of the second embodiment, a cam arm 81 is mounted outside one arm 2b of the rotating shaft 1. The cam arm 81 protrudes outward in the radial direction from the rotation shaft 1, and a distal end outer peripheral surface of the cam arm 81 forms a cam surface 82. On the other hand, a part of the base plate 6 extends in the horizontal direction at a position corresponding to the cam arm 81, and the damper 8 is attached to the position extending in the horizontal direction. The damper 8 has a rod 83 (see FIG. 11A) extending from a piston (not shown) toward the cam arm 81, and a slide piece 84 is attached to the tip of the rod 83. The damper 8 is of a hydraulic type. When the slide piece 84 is pushed toward the damper 8, the damper 8 resists the movement of the piston in the oil enclosed therein (oil viscosity or oil viscosity). (Flow resistance). Further, a spring (not shown) for projecting the piston and the rod 83 toward the cam arm 81 is incorporated. Therefore, the slide piece 84 is pressed against the cam surface 82 so that both slide.

  In this second embodiment, the operating rod 7 is directly inserted into a round hole at the tip of the arm 2 without using a tube, but the operating rod 7 is attached to the rotating shaft 1. May be performed in various other ways.

  FIG. 11 is an explanatory diagram illustrating the operation of the cam arm 81 and the damper 8. The profile of the cam arm 81 is a spindle shape extending in the length direction of the arm 2 with respect to the rotation shaft 1, and the slide piece 84, which is a cam follower pushed by this, is pushed to the left in FIG. . That is, the cam surface 82 is moved from the state where the cam arm 81 rotates together with the rotary shaft 1 to the position where the rollers 3a and 3b lift the rail R, and the position where the rollers 3a and 3b lower the rail R The slide piece 84 is configured to be gradually pushed into the damper 8 by rotating together with the damper 8.

  FIG. 11A shows a state in which the rail R is lifted, and the slide piece 84 is in contact with an arc portion of the cam surface 82 which is the most retreated (thinnest) from the damper 8. That is, the rod 83 and the slide piece 84 are in the most protruding state. When the operating rod 7 is rotated in the direction of the arrow and the rail R is lowered, the rotating shaft 1 and the cam arm 81 attached thereto are rotated in the counterclockwise direction (the direction of the arrow) in FIG. . The shape of the cam surface 82 is such that the distance from the center of the rotary shaft 1 at the point of contact with the slide piece 84 by rotating as described above gradually increases, so that the slide piece 84 and the rod 83 are connected to the damper 8. To be gradually pushed into the state shown in FIG.

  The damper 8 is of a hydraulic type. A piston is inserted into a cylinder filled with oil, and when the piston moves, the oil passes through a thin hole provided in the piston, thereby generating a resistance force and suppressing the moving speed. There are two types of one-sided and two-sided effects depending on the purpose of use, but in the present invention, since the purpose is to suppress the speed at which the rail R is lowered, the single-sided effect is sufficient. The damping effect can be adjusted by adjusting the degree of restriction of the oil passage passing through the piston, so that the damping effect can be arbitrarily changed even during the operation.

  By providing such a damper 8, when the rail R is lowered, the rail R does not suddenly fall due to its own weight, and the work can be performed safely. Alternatively, the force by which the operator supports the operation rod 7 or the burden on the operator can be reduced.

  The slide piece 84 is provided with a projection 85 as shown in the figure. The projection 85 is formed so as to be hooked from above on the distal end of the cam arm 81 in a state where the rail R is completely lowered and the cam arm 81 is lowered to a horizontal state. Therefore, a portion below the protrusion 85 in FIG. 11 is retracted from the tip of the cam arm 81. Therefore, when the foremost end of the cam arm 81 passes from the top to the bottom of the projection 85, the rod 83 and the slide piece 84 advance by the spring built in the damper 8 and come into contact with the cam surface 82, and the projection 85 is moved. The tip of the cam arm 81 is hooked from above. Therefore, when the arm 2 is not particularly rotated by the operation rod 7, the arm 2 or the rotating shaft 1 does not rotate because the cam arm 81 is hooked on the projection 85. As described above, the projection 85 serves as a stopper for preventing the arm 2 from opening when the arm 2 is folded, and prevents the arm 2 and the like from fluttering when being carried. Since the operation rod 7 is used to lift the rail R, the slide piece 84 is once pushed back to the damper 8 side, and the tip of the cam arm 81 is easily detached from the projection 85, so that the operation is not hindered.

  Further, as shown in FIGS. 8 and 10, at a position higher than the roller 3b inside the one (2b) of the pair of arms (a position on the tip side of the arm 2b), in the same direction as the arm 2b (the longitudinal direction of the arm 2b). A vertical roller 9 having a rotation center axis (direction parallel to the direction) is provided. This is for the purpose of smoothing the feed by the vertical roller 9 because the rail R is biased to the lower side when the rail R is vertically fed at a curved portion where the rail surface is inclined (canted). When the railway rail lifting device according to the present invention is inserted under the rail R, it is only necessary to lower the one with the vertical roller 9 on the lower side, so there is no need to provide rollers on both sides.

  Although not particularly shown, if a leaf spring is attached using the two right bolts so as to cover the upper surface of the cam arm 81 in FIG. 9, when the rail is lifted, the cam arm 81 pushes up this leaf spring and raises the vertex. Since the rail is supported at an excessive position, when the rail is fed longitudinally, there is an effect that the contact between the roller 3 and the rail is poor and the cam arm 81 is prevented from returning due to the weight of the operation rod 7 or the like. The leaf spring also serves as a cover for the cam arm.

DESCRIPTION OF SYMBOLS 1 ... Rotating shaft, 2 ... Arm, 3 ... Roller, 4 ... Tube, 5 ... Bearing, 6 ... Base plate, 7 ... Operation rod, 8 ... Damper, 9 ... Vertical roller, 61a, 61b ... Fitting claw, 62 , 62a, 62b ... convex portion, 63a, 63b ... inclined surface, 81 ... cam arm, 82 ... cam surface, 83 ... rod, 84 ... slide piece, 85 ... protrusion, B ... bolt, P ... track pad, R ... rail, S: Slab (floor), T: Tie plate.

Claims (5)

  An arm attached to a rotating shaft, a plurality of rollers rotatably attached to different positions in the longitudinal direction of the arm, and a rail capable of connecting an operating rod for rotating the arm to the rotating shaft or the arm. A lifting mechanism is attached to a base plate having a bearing for supporting the rotating shaft, and an operating rod is connected to the rotating shaft or the arm to rotate the rotating shaft so that the roller can raise and lower the rail. The railroad rail lifting device, wherein the plurality of rollers are attached to a position closer to the upper surface of the arm as the roller is closer to the rotation axis when the arm is horizontally inclined. Lifting equipment.   The arm includes a pair of arms attached to the rotating shaft such that an inner space is wider than a width of a bottom of the rail. The railway rail lifting device according to claim 1, wherein the railway rail lifting device can be inserted under a bottom of the rail.   A fitting claw is provided at an end of the base plate so that the base plate is fitted to a pedestal of a rail fastening device when the base plate is placed on a rail mounting floor slab of a slab track. The railway rail lifting device according to claim 1 or 2, wherein: A cam arm attached to the rotating shaft so as to protrude outward in the radial direction of the rotating shaft and having a distal end outer peripheral surface as a cam surface;
A damper attached to the base plate so as to have a slide piece slidably in contact with the cam surface and generate a resistance to an operation in which the slide piece is pushed in,
The cam surface is formed by rotating the cam arm together with the rotation shaft to a position where the roller lowers the rail from a state where the cam arm is rotating together with the rotation shaft at a position where the roller lifts the rail. The railway rail lifting device according to any one of claims 1 to 3, wherein the slide piece is configured to be gradually pushed into the damper. A vertical roller having a rotation center axis in a direction parallel to a longitudinal direction of the arm is provided inside at least one arm of the pair of arms and at a position closer to the distal end of the arm than the roller. Any one of claim 2, claim 3 quoting claim 2, claim 4 quoting claim 2, and claim 4 quoting claim 2 The railroad rail lifting device according to item 1.

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