JP2005207143A - Rail overturning preventing device and rail connecting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To positively prevent overturning of a rail heretofore difficult to prevent in connecting a new rail to an existing rail and removing an old rail. <P>SOLUTION: This rail overturning preventing device 1 is provided with a pair of holders 2 for supporting the head H of the rail R from the right and left, and a pedestal 3 to which the holders 2 are mounted, for supporting the base part B of the rail R from below. The pedestal 3 is supported to a surrounding fixed structure T by support means 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a device for supporting a rail before or after replacement and preventing the vehicle from falling to the side during rail replacement for railroads. In the following description, “falling” of the rail includes inclination to the side of the rail, so-called “small turn”.

When exchanging rails for railroads, if the rail before or after replacement falls, the rails for replacement (hereinafter referred to as “new rails”) newly laid on the roadbed and already laid on the roadbed Connection to the existing rail (hereinafter referred to as “existing rail”) and removal of the replaced rail (hereinafter referred to as “old rail”) will be hindered. Therefore, conventionally, a device that supports the rail on the roadbed from the side and prevents the vehicle from toppling over has been proposed (for example, see Patent Document 1).
JP 2001-23456 A (page 2-3, FIG. 1)

  When connecting the new rail to the existing rail, first, the part of the new rail is first lifted away from the connection position with the existing rail, so that the new rail is retracted in the direction opposite to the connection direction to the existing rail. In this state, the end surfaces of the new rail and the existing rail are made to face each other. Next, when the new rail is lowered, the new rail moves forward in the connection direction, and the end surface of the new rail comes into pressure contact with the end surface of the existing rail. Then, by heating the pressure-contacted end surfaces with gas, the end surfaces of the new rail are melted while being pressed against the end surfaces of the existing rail, and the end surfaces of the new rail and the existing rail are connected while being in close contact with each other. In addition, burrs generated by melting the rail are removed by polishing after the rail is connected.

  By the way, at the time of the connection operation, the new rail that has been lifted easily falls down. Therefore, conventionally, a member such as a sleeper is directed to the new rail from below to maintain its level. However, especially in curved sections, it is difficult to maintain the level of the new rail simply by directing the members from below, and once the new rail falls, it is difficult to return the rail to level. It was. There is also a problem that a member for supporting the new rail from below has to be prepared each time.

  On the other hand, the old rail after replacement is left on the side of the roadbed and then collected by the transport vehicle. However, since there is no effective means to prevent the left old rail from falling, the old rail is transported. When loading into a car, the rail would fall, and as a result, it could be difficult to load the car.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to reliably prevent the rail from falling over, which has been difficult to prevent when connecting a new rail and an existing rail or removing an old rail.

  The rail overturn prevention device of the present invention includes a pair of holders that support the head of the rail from the left and right, and a pedestal that supports the base of the rail from below while being attached to the holder. It is supported by a surrounding fixed structure by means.

  In this case, examples of the fixed structure include sleepers positioned on the road bed, a frame body embedded in the road bed, and the like.

  When a sleeper is used as the fixed structure, the pedestal is supported on the sleeper from above or from the side.

  Moreover, it is desirable that the holder includes a first roller that supports the rail so as to be movable in the longitudinal direction.

  Moreover, it is desirable that the pedestal includes a second roller that supports the rail so as to be movable in the longitudinal direction.

  Furthermore, the present invention relates to a rail connection method including a step of retracting the end of the rail from the connection position by lifting a part of the rail to be connected. It is supported by a prevention device.

  In this case, it is desirable to use at least one support base between the tip of the rail and the position where the rail is lifted to support the rail base from below.

  More preferably, a plurality of the support bases having different heights according to the inclination of the rail from the end of the rail to the lifting position of the rail are used, and the rail is connected to the end of the rail and the rail. It is supported at a plurality of locations between the lifting position.

  Further, it is desirable that the support base includes a third roller that supports the rail so as to be movable in the longitudinal direction.

  In the fall prevention device of the present invention, the head of the rail is supported from the left and right by the holder, and the base of the rail is supported from below by the pedestal. Therefore, the rail is reliably supported from the left, right, and lower sides, and as a result, the rail is reliably prevented from falling when the new rail is connected to the existing rail or when the old rail is removed. Furthermore, since the pedestal is supported on the surrounding fixed structure at an arbitrary position, for example, on the side of the road bed, by the support means, the old rail left on the side of the road bed, which has been impossible in the past. As a result, it is possible to prevent the old rail from falling over when loading into the transport vehicle, and the loading of the old rail into the transport vehicle is facilitated.

  In addition, by providing the holder or pedestal with a roller that supports the rail so that the rail can move in the longitudinal direction, the rail supported by the fall prevention device can be easily and smoothly along the longitudinal direction while preventing the fall. It becomes possible to move.

  Furthermore, in the rail connection method of the present invention, when lifting the part of the rail to be connected and retracting the tip from the connection position, by supporting the tip of the rail with the above-described rail overturn prevention device, The tip of the lifted rail is prevented from falling and its level is maintained. As a result, accurate rail connection with no positional deviation can be easily performed.

  In this case, twisting of the lifted rail is prevented by using at least one support between the tip of the rail and the lifting position of the rail, and supporting the base of the rail from below. Is more reliably maintained. In addition, since a support base suitable for supporting the rail is prepared in advance, it is not necessary to prepare a member for supporting the rail from below each time, and the connection work is simplified.

  Furthermore, using a plurality of support bases having different heights depending on the inclination of the rail from the rail tip to the rail lift position, the rail is supported from below at a plurality of positions between the tip and the lift position. By doing so, the lifted rail is supported over the entire area. As a result, twisting of the raised rail can be more reliably prevented, for example, in a curved section.

  In addition, by providing a roller that supports the rail so that the rail can move in the longitudinal direction, the rail supported by the support can be easily and smoothly moved along the longitudinal direction while maintaining the level of the rail. It becomes.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
An example of a rail overturn prevention device (hereinafter abbreviated as a overturn prevention device) according to the present invention is shown in FIGS. 1 to 3 are a front view, a top view, and a side view of the overturn prevention device, respectively. In the following description, the extending direction of the rail is defined as front and rear, and the extending direction of the sleepers orthogonal to the rail is defined as left and right.

  The fall prevention device 1 includes a pair of holders 2 that support the head H of the rail R from the left and right, and a pedestal 3 that supports the base B of the rail R from below while the holders 2 are attached.

  The holder 2 includes a pair of left and right arms 21 erected on the pedestal 3 at both left and right ends of the pedestal 3, and a pair of upper and lower bearing portions 22 that protrude from the upper ends of the individual arms 21 toward each other. And a roller (first roller) 23 supported between the individual bearing portions 22 so as to be rotatable about an axis extending in a substantially vertical direction. Here, as shown in FIG. 1 and FIG. 2, the interval between the rollers 23 provided on the individual arms 21 is such that when the rail R is inserted between the arms 21, the head H of the rail R has the roller 23. It is set so that it can be moved forward and backward without inclining to the left and right.

  A sheath 24 having a slit-like opening 24 a extending in the front-rear direction is formed at the lower end of each arm 21. And this opening 24a and the slit-like opening 34a which the sheath part 34 (after-mentioned) formed in the upper end of the base 3 has also extended in the front-back direction are piled up back and forth, and it opens to these openings 24a and 34a at one end. The holder 2 is supported at a predetermined position on the pedestal 3 by inserting a spatula-like fastener 25 having a head portion 25a wider than 24a and 34a from the other end side.

  Reference numeral 26 indicates that when the fastener 25 is inserted into the openings 24a and 34a, the fitting 26 is fitted to the other end of the fastener 25 protruding from the opening 34a on the opposite side to the insertion side. It is a pin that prevents the fastener 25 from coming off. Then, by removing the pin 26 from the fastener 25 and removing the fastener 25 from the openings 24a and 34a, the holder 2 can be removed from the base 3 as shown by a two-dot chain line in FIG.

  The pedestal 3 includes a rectangular parallelepiped main body 31 having a rectangular front surface and an upper surface, which extends to the left and right on the sleepers T, and an axis extending to the left and right via a bearing portion 32 at the center of the upper surface of the main body 31. And a pair of left and right sheaths 34 attached to the left and right ends of the upper surface, and a pair of left and right protrusions protruding sideways from the left and right edges of the upper surface. And a handle 35.

  Here, as shown in FIGS. 1 and 3, the position and shape of the roller 33 are such that when the rail R is inserted between the arms 21 of the holder 2, the upper surface of the roller 33 defines the base B of the rail R. It is set so that it can be moved back and forth from below. Moreover, each sheath part 34 is divided | segmented into front and back, By opening the sheath part 24 of each arm 21 between these divided | segmented sheath parts 34, opening 24a, 34a which the sheath parts 24 and 34 have overlapped back and forth. Thus, the above-described fastener 25 can be inserted and the holder 2 can be supported on the base 3.

  Furthermore, the main body 31 is detachably supported at a fixed position of the rail R in the sleeper T by a known clip (support means) 4 used for fixing the rail R to the sleeper T. That is, in the case of this embodiment, as shown in FIG.1 and FIG.2, the fall prevention apparatus 1 is supported from the upper part by the sleeper T which is a fixed structure, As a result, rail R is made into rail R with respect to sleeper T. It becomes possible to support by the fall prevention device 1 just above the fixed position.

  This overturn prevention device 1 is used for preventing overturning of the new rail when the new rail and the existing rail are connected. In this case, after the old rail is removed, the fall prevention device 1 is attached in advance to the fixed position of the rail R in the sleeper T, and the new rail is inserted between the arms 21 of the holder 2 from the rear in the connection direction. Then, the head H of the new rail is supported from the left and right by the holder 2, and the base B of the new rail is supported from below by the pedestal 3. As a result, the new rail is reliably supported from the left, right, and lower sides, and the new rail is reliably prevented from falling when the new rail and the existing rail are connected.

  Further, since the holder 2 and the pedestal 3 are provided with the rollers 23 and 33 that support the rail R so as to be movable in the longitudinal direction, the rollers 23 and 33 are moved in the longitudinal direction of the rail R supported by the fall prevention device 1. As a result, the rail R supported by the fall prevention device 1 can be easily and smoothly moved along the longitudinal direction while preventing the fall. Furthermore, adverse effects such as wear of the fall prevention device 1 accompanying the movement of the rail R are reduced. Moreover, since the fall prevention device 1 is small and light and can be easily disassembled (or easily assembled) into the holder 2 and the base 3, the fall prevention device 1 can be easily transported, installed, and removed. Is possible.

  Another example of the fall prevention device according to the present invention is shown in FIGS. 4 and 5 are a front view and a top view of the overturn prevention device, respectively. In addition, in the following description, about the member which has the structure similar to the fall prevention apparatus 1 shown to FIG. 1 thru | or FIG. 3, the code | symbol same as FIG. 1 thru | or FIG.

  The fall prevention device 1A includes a pair of holders 5 that support the head H of the rail R from the left and right, a pedestal 6 that supports the base B of the rail R from below, and a pedestal 6 that is a sleeper. (Fixed structure) Support means 7 for supporting the side of T is provided.

  The holder 5 has a structure similar to the holder 2 shown in FIGS. 1 to 3 except that the arm 21 does not have the sheath 24 at the lower end. The pedestal 6 includes a main body 61 that extends from side to side and has a substantially rectangular shape when viewed from the top, and a roller (second second) supported by an upper central portion of the main body 61 so as to be rotatable about a left and right axis. Roller) 62 and a pair of left and right sockets 63 attached to the left and right ends of the main body 61 so as to be positioned diagonally as viewed from above as shown in FIG. The individual sockets 63 are opened upward, and the lower ends of the arms 21 are fitted into the sockets 63 so that the pair of left and right arms 21 are positioned at predetermined positions on the pedestal 3 (the upper side of the left and right ends of the main body 61 is the upper side). Standing diagonally when viewed).

  Here, as shown in FIGS. 4 and 5, the distance between the rollers 23 provided on the individual arms 21 is such that when the rail R is inserted between the arms 21, the head H of the rail R moves the roller 23. It is set so that it can be moved forward and backward without inclining to the left and right. Further, as shown in FIG. 4, the position and shape of the roller 62 are such that when the rail R is inserted between the arms 21, the upper surface of the roller 62 can move the base B of the rail R back and forth from below. Set to support.

  The support means 7 includes a bar 71 protruding from the left end or right end of the main body 61 to the side (sleeper T side), and a clamp 72 attached to the tip of the bar 71. A pair of front and rear gripping portions 71a for sandwiching a stay 72a (described later) of the clamp 72 from the front and rear is formed at the tip of the bar 71, and each gripping portion 71a has a bolt 71b inserted into a hole 72e described later from the front and rear. Are screwed in from the front and back. Reference numeral 71c is a hinge for folding the bar 71 downward.

  The clamp 72 can be moved up and down by the rotation of the adjusting screw 72c from the lower end of the stay 72a, the lower clamp 72b protruding from the lower end of the stay 72a to the side opposite to the mounting side of the bar 71, and the upper end of the stay 72a. An upper clamp 72d that is attached and protrudes in parallel with the lower clamp 72b from the upper end of the stay 72a is provided. In addition, a plurality of holes 72e penetrating the side surface of the stay 72a in the front-rear direction are provided at predetermined intervals along the vertical direction in the upper portion and the central portion of the stay 72a. Then, the stay 71a is clamped by the gripping portion 71a described above, and the bolt 71b is inserted into any one of these holes 72e from the front and rear, whereby the bar 71 and the clamp 72 are connected. Here, by selecting the hole 72e into which the bolt 71b is inserted, the relative height of the holder 5 and the base 6 with respect to the clamp 72 can be adjusted. In the example of FIG. 4, since the bolt 71b is inserted into the hole 72e that opens to the top of the stay 72a, the height of the holder 5 and the base 6 with respect to the clamp 72 is the highest.

  The fall prevention device 1A moves the upper clamp 72d up and down by the rotation of the adjustment screw 72c, and sandwiches the upper and lower surfaces of the sleeper T from the side by the lower clamp 72b and the upper clamp 72d, thereby moving the upper clamp 72d to the side of the sleeper T. It is supported detachably. As a result, as shown in FIGS. 4 and 5, the rail R can be supported by the fall prevention device 1 </ b> A on the side of the road bed.

  The fall prevention device 1A is used to prevent the fall of the old rail left on the side of the road bed when the old rail is removed. In this case, prior to removal of the old rail, the fall prevention devices 1A are respectively attached in advance to both ends of the sleepers T to which the old rail is attached, and the removed old rail is attached to the arm 21 of the holder 5 from the rear in the removal direction. Insert between them. Then, the head H of the old rail is supported from the left and right by the holder 5, and the base B of the old rail is supported from below by the pedestal 6. As a result, the old rail is reliably supported from the left, right, and lower sides, and the old rail is reliably prevented from falling. Therefore, it is possible to prevent the fall of the old rail left on the side of the road bed, which was impossible in the past, and as a result, the old rail does not fall over when loading into the transport vehicle. Loading of rails is facilitated.

  In addition, the installation position and the number of the fall prevention devices 1A are determined according to the length of the old rail and the curve condition. In general, good results can be obtained by attaching the anti-falling device 1A from about 100 m behind the loading position to the transport vehicle at about 3 to 5 places at intervals of 100 m and supporting the old rail by these anti-tip devices 1A.

  Also, since the holder 5 and the pedestal 6 are provided with rollers 23 and 62 for supporting the rail R so as to be movable in the longitudinal direction, the rollers 23 and 62 are moved during the movement along the longitudinal direction of the rail R supported by the fall prevention device 1A. As a result, the rail R supported by the fall prevention device 1A can be easily moved along the longitudinal direction while preventing the fall. Furthermore, adverse effects such as wear of the fall prevention device 1A accompanying the movement of the rail R are reduced. Moreover, since the fall prevention device 1A is small and light and can be easily disassembled (or easily assembled) into the holder 5 and the base 6, the fall prevention device 1A can be easily transported, installed, and removed. Is possible.

  Still another example of the overturn prevention device according to the present invention is shown in FIGS. This fall prevention device cannot be used with the fall prevention device 1A shown in FIGS. 4 and 5, for example, when removing the old rail in a tunnel or the like, it is used for preventing the fall of the old rail left on the side of the roadbed. FIG. 7 is a front view of the overturn prevention device, and FIG. 8 is an enlarged view of a main part thereof.

  This fall prevention device 1B includes a pair of holders 8 that support the head H of the rail R from the left and right, a pedestal 9 that supports the base B of the rail R from below, and the pedestal 9, And a supporting means 10 that supports a frame (fixed structure) 11 disposed in the tunnel. The frame body 11 is U-shaped in a concrete cross-sectional view, embedded in the tunnel bed in the tunnel, for the purpose of forming a working path on the side of the track. It is the member which makes.

  The holder 8 does not have the sheath portion 24 at the lower end of the arm 21 and is directed upward from the lower end surface of the arm 21 except that a screw hole 81 for inserting a bolt 82 described later is formed. It has a structure similar to the holder 2 shown in FIGS. The pedestal 9 includes a main body 91 extending left and right, a roller (second roller) 92 supported on an upper central portion of the main body 91 so as to be rotatable about a left and right axis, and left and right of the main body 91. At both ends, a pair of openings 93 that open upward is provided. Then, the lower ends of the individual arms 21 are fitted into these openings 93, and bolts 82 are screwed into the screw holes 81 from below through the main body 91, so that the pair of left and right arms 21 are provided on the base 9. It is erected at a position (both left and right ends of the main body 91).

  Here, as shown in FIG. 7, the interval between the rollers 23 provided on the individual arms 21 is such that when the rail R is inserted between the arms 21, the head H of the rail R moves between the rollers 23. It is set so that it can be moved forward and backward without tilting left and right. Further, as shown in FIG. 7, the position and shape of the roller 92 are such that when the rail R is inserted between the arms 21, the upper surface of the roller 92 can move from the lower part to the front and back of the base B of the rail R. Set to support.

  The support means 10 includes a clamp 101 protruding from the left end or right end of the main body 91 to the side (side wall 11 a side of the frame body 11) and a leg portion 102 depending from the main body 91. The clamp 101 includes a horizontal bar 101a fixed to the left end or the right end of the main body 91, a fixed clamp 101b protruding downward, which is detachably supported by a bolt or the like at a predetermined position of the tip of the bar 101a, A plate 101c hanging from the main body 91 on the base end side of 101a and a movable clamp 101d supported by the plate 101c so as to be movable left and right are provided. The movable clamp 101d is a bolt-like member extending to the left and right, and moves to the left and right by the rotation of the knob 101e provided at the base end. Reference numeral 101f denotes a fixing nut for fixing the movable clamp 101d to a predetermined position.

  The leg portion 102 is inserted into a socket 94 formed at the lower end of the main body 91 from below, so that the leg portions 102a, 102b, 102c are detachably supported by the main body 91, and the lower end of the leg column 102c. And an attached support plate 102d.

  In the fall prevention device 1B, after the fixed clamp 101b is brought into contact with the side wall 11a of the frame 11 from the outside (the road bed side), the movable clamp 101d is brought into contact with the side wall 11a from the inside (passage side) by the rotation of the knob 101e. As a result, the side wall 11a is sandwiched from the left and right by the fixed clamp 101b and the movable clamp 101d, and the leg columns 102a, 102b, and 102c are extended until the support plate 102d comes into contact with the bottom surface 11b of the frame body 11 from above. The frame 11 is detachably supported. As a result, as shown in FIG. 6, the rail R can be supported by the fall prevention device 1 </ b> B on the side of the roadbed.

  The fall prevention device 1B is used for preventing the fall of the old rail left on the side of the road bed when the old rail is removed from the tunnel. In this case, prior to the removal of the old rail, the fall prevention devices 1B are respectively attached in advance to both ends of the sleepers T to which the old rail is attached, and the removed old rail is attached to the arm 21 of the holder 8 from the rear in the removal direction. Insert between them. Then, the head H of the old rail is supported from the left and right by the holder 8, and the base B of the old rail is supported from below by the pedestal 9. As a result, the old rail is reliably supported from the left, right, and lower sides, and the old rail is reliably prevented from falling. Therefore, it is possible to prevent the fall of the old rail left on the side of the road bed, which was impossible in the past, and as a result, the old rail does not fall over when loading into the transport vehicle. Loading of rails is facilitated. In particular, the fall prevention device 1B can support the old rail in the tunnel, which has been impossible to support the old rail in the past, and as a result, has achieved the above effects. It has advantages that are not available.

  In addition, the installation position and the number of the fall prevention devices 1B are determined according to the length of the old rail and the curve condition. In general, the fall prevention device 1B is attached about 3 to 5 places at intervals of 100 m from the rear of the loading position to the transport vehicle about 100 to 5 m like the above-described fall prevention device 1A, and the old rail is attached by these fall prevention devices 1B. If you support it, you get good results.

  Further, since the holders 8 and the pedestal 9 are provided with the rollers 23 and 92 that support the rail R so as to be movable in the longitudinal direction, the rollers 23 and 92 are moved during the movement along the longitudinal direction of the rail R supported by the fall prevention device 1B. As a result, the rail R supported by the overturn prevention device 1B can be easily moved along the longitudinal direction while preventing the overturn. Furthermore, adverse effects such as wear of the fall prevention device 1B accompanying the movement of the rail R are reduced. Moreover, since the fall prevention device 1B is small and light and can be easily disassembled (or easily assembled) into the holder 8, the base 9 and the support means 10, the fall prevention device 1B can be transported, installed, and removed. It can be easily implemented.

  Next, a rail connection method using the fall prevention device 1 according to the present invention will be described. This rail connection method is a rail connection method including a step of retracting the end of the rail from the connection position by lifting a part of the rail to be connected. It is something to support.

  An example of a rail connection method using the fall prevention device 1 according to the present invention will be described with reference to FIG. This rail connection method basically has the same steps as the conventional rail connection method. That is, first, a part of the new rail R1 temporarily placed on the roadbed G is previously separated from the connection position with the existing rail R2 (backward about 30 m from the connection position with the existing rail R2). The new rail R1 is retracted in the direction opposite to the direction of connection to the existing rail R2 (rightward in the figure) by lifting up using the, and the end surfaces of the new rail R1 and the existing rail R2 are opposed to each other in this state. Next, the lifted new rail R1 is lowered to advance the new rail in the connection direction (left side in the figure), and the end surface of the new rail R1 is pressed against the end surface of the existing rail R2. Then, by heating these end faces that are in pressure contact with a rail pressure welder, the end face of the new rail R1 is melted while being pressed against the end face of the existing rail R2, and the end faces of the new rail R1 and the existing rail R2 are Connected in close contact. Moreover, the burr | flash produced by melt | dissolution of a rail is removed by grinding | polishing after the rails R1 and R2 are connected.

  In the rail connection method of the present invention, when a part of the new rail R1 is lifted and its tip is retracted from the connection position, the tip of the new rail R1 (about 4-5 m behind the connection position with the existing rail R2) Is supported in advance by the above-described overturn prevention device 1, the overturning at the tip of the new rail R <b> 1 lifted is prevented, and the level is maintained. As a result, the rails R1 and R2 can be accurately connected without causing misalignment with each other. In addition, since the rails R1 and R2 do not shift in position, the rails R1 and R2 can be easily connected.

  In this case, for example, as shown in FIG. 8, at least one support base 12 is used between the tip end of the new rail R1 supported by the overturn prevention device 1 and the lifting position of the new rail R1, and the new rail R1 is used. It is desirable to support the base B from below. In this case, the support base 12 is disposed in the gap between the top surface of the sleeper T and the bottom surface of the new rail R1 between the tip of the new rail R1 and the lifted position of the new rail R1, and The base B is supported from below.

An example of the structure of the support base 12 is shown in FIG. 9A, 9B, and 9C are a top view, a front view, and a side view of the support base 12, respectively.
The support base 12 is supported on a sleeper T extending left and right, for example, a main body 121 having a rectangular shape when viewed from above, and an upper central portion of the main body 121 so as to be rotatable around a shaft 122 extending left and right. A roller (third roller) 123 and a pair of grips 124 provided at the left and right ends of the main body 121 are provided. Further, the shape of the lower end portion of the main body 121 (the portion denoted by reference numeral 121a in FIG. 9) is such that when the support base 12 is placed on the sleeper T, the support base 12 is displaced on the sleeper T. It is set to be supported stably without waking up. Further, the height h of the support base 12 including the roller 123 is such that when the support base 12 is placed on the sleeper T, the upper surface of the roller 123 can move the base B of the new rail R back and forth from below. Set to support.

  By using the support base 12 and supporting the base B of the new rail R1 from below between the tip of the new rail R1 supported by the fall prevention device 1 and the lifting position of the new rail R1, the new The twist of the rail R1 is prevented, and as a result, the level of the new rail R is more reliably maintained. In addition, by preparing in advance a support base 12 suitable for supporting the new rail R1, it is not necessary to prepare a member for supporting the new rail R1 from below each time, and the connecting operation of the rail is simplified.

  In addition, since the support base 12 is provided with a roller 123 that supports the new rail R1 so as to be movable in the longitudinal direction, the roller 123 rotates when the new rail R1 supported on the support base 12 moves along the longitudinal direction. As a result, the new rail R1 supported on the support base 12 can be easily moved along the longitudinal direction while maintaining its horizontal level. Furthermore, adverse effects such as wear of the support base 12 due to the movement of the rail R are reduced.

  Furthermore, in order to prevent twisting of the new rail R1 more reliably, as shown in FIG. 8, in addition to the support base 12, according to the inclination of the new rail R1 from the tip of the new rail R1 to the lifting position of the new rail R1. A plurality of support bases 12a and 12b having different heights are prepared, and using these support bases 12, 12a and 12b, the new rail R1 is placed between the tip of the new rail R1 and the lifting position of the new rail R1. You may support in multiple places.

  The new rail R1 that has been lifted by supporting the new rail R1 from below at a plurality of locations between the tip of the new rail R1 and the lifting position of the new rail R1 using the plurality of support bases 12, 12a, 12b. Will be supported throughout. As a result, twisting of the raised new rail R1 can be more reliably prevented, for example, in a curved section.

  Note that the fall prevention device and the support base according to the present invention are not limited to those disclosed in the above embodiment. That is, the present invention includes a fall prevention device and a support base having various structures different from those of the above embodiment without departing from the spirit of the present invention. Further, the materials of the overturn prevention device and the support base according to the present invention are not particularly limited, but at least the main part is preferably made of metal from the viewpoint of strength.

It is a front view along arrow I in Drawing 3 showing an example of a fall prevention device concerning the present invention. It is a top view along arrow II in Drawing 1 showing an example of a fall prevention device concerning the present invention. It is a side view along arrow III in Drawing 1 showing an example of a fall prevention device concerning the present invention. It is a front view along arrow IV in FIG. 5 which shows an example of the fall prevention apparatus which concerns on this invention. FIG. 5 is a top view taken along an arrow V in FIG. 4 showing an example of the fall prevention device according to the present invention. It is a front view which shows an example of the fall prevention apparatus which concerns on this invention. It is a principal part enlarged view of the fall prevention apparatus shown in FIG. It is a figure explaining the example of the connection method of the rail using the fall prevention apparatus which concerns on this invention. The example of the structure of the support stand used for the rail connection method which concerns on this invention is shown, (a) is a top view along the arrow a direction of a support stand, (b) is the arrow b direction of a support stand. The front view along (c) is a side view along the arrow c direction of the support base.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A, 1B ... Rail fall prevention device 2, 5, 8 ... Holder 3, 6, 9 ... Base 4 ... Clip (support means)
7, 10 ... support means 11 ... frame (fixed structure)
12, 12a, 12b ... support stand 23 ... roller (first roller)
33, 62, 92 ... roller (second roller)
123 ... Roller (third roller)
B ... Rail base G ... Road bed H ... Rail head R ... Rail R1 ... New rail (rail to be connected)
T ... sleepers (fixed structure)

Claims (11)

  A pair of holders for supporting the head of the rail from the left and right, and a holder for attaching these holders and a base for supporting the base of the rail from below, are supported by a surrounding fixed structure by a supporting means. Rail fall prevention device characterized by that.   The rail overturn prevention device according to claim 1, wherein the fixed structure is a sleeper located on a roadbed.   3. The rail overturn prevention device according to claim 2, wherein the pedestal is supported by the sleepers from above.   3. The rail overturn prevention device according to claim 2, wherein the pedestal is supported from the side by the sleepers.   2. The rail overturn prevention device according to claim 1, wherein the fixed structure is a frame body embedded in a road bed.   The rail overturn prevention device according to any one of claims 1 to 5, wherein the holder includes a first roller that supports the rail so as to be movable in a longitudinal direction thereof.   The rail fall prevention device according to any one of claims 1 to 6, wherein the pedestal includes a second roller that supports the rail so as to be movable in a longitudinal direction thereof. A rail connection method comprising a step of retracting a tip of the rail from a connection position by lifting a part of the rail to be connected,
A rail connecting method, wherein the rail tip end portion is supported by the rail overturn prevention device according to claim 1.   9. The rail connection method according to claim 8, wherein the base portion of the rail is supported from below by using at least one support between the tip of the rail and the lifting position of the rail.   A plurality of support bases having different heights according to the inclination of the rail from the rail tip to the rail lift position are used, and the rail is placed between the rail tip and the rail lift position. The rail connection method according to claim 8, wherein the rail is supported at a plurality of locations. The rail connection method according to claim 9 or 10, wherein the support base includes a third roller that supports the rail so as to be movable in a longitudinal direction thereof.

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