JP2005273312A - Track slab carrying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a track slab carrying device capable of rapidly moving into a working place, installing a crane body structure in a short time in the working place and starting track slab replacing work immediately. <P>SOLUTION: This track slab carrying device is provided with a truck 1 traveling a track R, and the portal crane body structure 2 having a pair of posts 3a, 3b and a traverse beam 4 for allowing a winding machine 5 for hanging the track slab S, to travel. The first post 3a on one side out of the pair of posts 3a, 3b is erected on the truck 1, and the crane body structure 2 is turnable around the first post 3a side used as a vertical axis. With turning operation, the crane body structure 2 can be changed over into an enclosed state with the longitudinal direction of the traverse beam 4 as the traveling direction side of the truck 1, and into a developed state of straddling a slab S for a track next to the travel track R of the truck 1 by turning in an orthogonal direction to the traveling direction of the truck 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a track slab transfer device.

The replacement work for the track slabs on the track has traditionally been done by constructing a gate-type crane structure at the work site (in the track) during the railroad downtime, such as at night. Is loaded onto a transport cart and replaced by installing a new slab. When the replacement work is completed, the crane structure is dismantled and removed.
Conventionally, a vehicle in which a jib crane is mounted on a carriage is known as a vehicle that can run on a track and can lift a slab or the like (see, for example, Patent Document 1).
JP-A-6-199490

In the work that is done by constructing the crane structure at the work place as before, much time is spent on crane installation (removal), the actual slab replacement work time is short, and only a few slabs can be replaced. There is a problem that work efficiency is poor.
The jib crane type vehicle has a problem that the slab loading / unloading range is extremely narrow due to its structure, and the jib crane is large and very unstable.

A track slab transport device according to the present invention includes a carriage that travels on a track, a portal crane that has a pair of support columns and a traverse beam that travels a hoisting machine that connects the support columns and suspends the track slab. A first strut on one side of the pair of struts is erected on the carriage, and the crane structure is pivotable with the first strut side as a vertical axis. The crane structure is turned by a turning operation so that the longitudinal direction of the traverse beam is in the traveling direction side of the carriage, and the trajectory next to the orbit adjacent to the orbit where the carriage travels in a direction orthogonal to the traveling direction of the carriage. It is possible to switch to a deployed state across slabs.
Further, the crane structure is provided at two places before and after the carriage. Further, a slab placement space is provided between the crane structures provided at two places before and after the carriage and on the carriage. Further, the second support column on the other side of the pair of support columns can be bent 180 ° upward, and a jack for changing the length of the support column is attached to the tip of the lower part.
Further, the traverse beam of the crane structure has a rack-shaped member along the longitudinal direction, and the hoisting machine rolls along the rack-shaped member to make the hoisting machine run and stop. A pinion for holding the hoisting machine at an arbitrary position of the rack-like member is provided.

  Further, the track slab transport device includes two connected carts that travel on the track, and crane structures provided at two positions before and after each cart, and each crane assembly includes a pair of columns and the columns. And a traverse beam that travels a hoisting machine that suspends and holds a slab for a track, and has a portal shape, and a first strut on one side of the pair of struts stands on the carriage. And the crane structure is pivotable about the first support column side as a vertical axis, and one set of the crane structure is used for removing the existing track slab, and the other A set of crane structures for the carriage is used to install a new track slab.

According to the track slab transport device of the present invention, the crane assembly can be moved from the vehicle base to the work place in a short time, and the crane structure can be put into the work state in a short time at the work place, and immediately the work for replacing the track slab is performed. be able to.
In other words, since the crane structure is mounted on the carriage, the crane structure can be quickly transported to the work place, and the crane structure can be easily put into a deployed state by a turning operation. And after completion | finish of work, a crane structure can be rapidly accommodated in a trolley | bogie by turning operation | movement. Therefore, the preparation work and the removal work at the work place can be completed in a short time, and it is possible to take much time for the slab replacement work, thereby improving efficiency.
By placing the crane structure in the retracted state on the carriage by the turning operation, the crane structure can be accommodated within the vehicle limit (dimension limit) when the carriage travels and moves on the track. The structure is not in contact with the structure adjacent to the overhead line or the track, and can be quickly moved to the work place.

  In addition, since one crane is provided with two front and rear (two) crane structures, it is safe to suspend the track slabs on both the front and rear sides. If it is translated along the transverse beam of the structure, the slab can be loaded in the slab mounting space on the carriage. In addition, if the slab is lifted from the carriage on which the new slab is placed and moved in parallel along the transverse beam of the crane structure, the new slab can be suspended at the slab installation location. That is, the operation is simple and efficient, and the work can be completed in a short time.

  1, 2, and 3 are a plan view, a side view, and a front view showing an embodiment of a track slab conveying device according to the present invention, and this device is used for a track slab S on a railroad track. A vehicle that can be replaced or installed (laying) a new track slab S. FIGS. 1 and 3 show a working state (deployed state), and FIG. 2 shows a non-working state (stored state). ing.

  The track slab S is provided on the track floor B, and is a member for placing and supporting the rail material, and is continuously disposed along the rail material. The track slab S is a concrete plate (slab board) with a size of, for example, 4.95 m long x 2.34 m wide x 160 mm thick, and a rail material mounting and fixing part 11 is formed on the top surface. Has been. In FIG. 1, one track slab S ′ is removed by the track slab transfer device, and the existing track slab S is located on the right side of the slab S ′ and the left side is replaced. This is a new track slab S.

This track slab transfer device includes a carriage 1 that travels on a track R and a gate-shaped crane structure 2, and the crane structure 2 connects a pair of support columns 3 a and 3 b and the support columns 3 a and 3 b. And a traverse beam (horizontal jib) 4 for running the hoisting machine 5 that suspends and holds the track slab S, and has a gate shape.
And the 1st support | pillar 3a of the one side of the pair of support | pillars 3a and 3b of the crane structure 2 is standingly arranged on the trolley | bogie 1, and the crane structure 2 can turn freely by making the 1st support | pillar 3a side into a vertical axis. It is said that. In addition, one crane assembly 2 is provided with one hoisting machine 5.

Therefore, the crane assembly 2 is turned by the turning operation, as shown in the two-dot chain line in FIG. 1 and in FIG. 2, the storage state in which the longitudinal direction of the transverse beam 4 is the traveling direction side of the carriage 1, and the solid line in FIG. As shown in FIG. 3, the vehicle 1 can be switched to an unfolded state straddling the track slab S adjacent to the track R that turns in the direction orthogonal to the traveling direction of the vehicle 1 and travels by the vehicle 1.
Therefore, this apparatus travels the carriage 1 to the work place, and performs the work of replacing the track slab S adjacent to the track R on which the carriage 1 travels (on the side adjacent line) at the work place. .

In addition, the crane structure 2 is provided at two locations on the front and rear sides of one carriage 1 and separated by a dimension (a little) larger than the length dimension (vertical dimension) of one track slab S. Then, the longitudinal direction of the transverse beam 4 of each crane assembly 2 is set to a direction orthogonal to the traveling direction of the carriage 1, and one track slab S is formed by the two crane assemblies 2, 2 in the front and rear. Are suspended together via the suspension bracket 12.
The first column 3a of the crane structure 2 is located on the front side and the rear side of the carriage 1 on the side farther from the track R to be worked than the front and rear center line of the carriage 1 in the same direction as the traveling direction of the carriage 1. The side edge 13 of the carriage 1 is standing upright. The front-rear direction is the traveling direction of the carriage 1 and the left-right direction is the direction orthogonal to the traveling direction.

That is, the transverse beam 4 crosses one end of the first support column 3a across the center line of the carriage 1 and the other end of the second support column 3b straddles the adjacent track slab S to be worked. It will be in the state arrange | positioned to the position beyond. Further, a slab placement space 10 is provided on the carriage 1 between the crane structures 2 and 2 provided at two places on the front and rear sides of the carriage 1.
As a result, the hoisting machines 5 and 5 traveling the transverse beams 4 and 4 of the pair of front and rear crane structures 2 and 2 have the slab mounting space on the carriage 1 including the hanging bracket 12 including the front and rear center lines of the carriage 1. Can be moved to just above 10.

  The carriage 1 is a vehicle that travels on the track R, and has a frame 15 that is rectangular in plan view and has a flat upper surface, and wheels 14 on the front and rear of the frame 15. The height of the upper surface of the frame 15 is 800 mm from the upper surface of the track R. It is a low-floor type of ~ 1000mm. At the front and rear ends of the frame 15 of the carriage 1, there are couplers 16, 16 that are connected to other vehicles (the carriage 1). A first column 3 a of the crane structure 2 is erected on the upper surface of the frame 15.

As shown in FIG. 4, in the crane structure 2, the lower column 17 of the first column 3 a is fixedly mounted on the carriage 1, and the upper column (rotary head) 18 of the first column 3 a is in relation to the lower column 17. It can rotate around the vertical axis. Then, one end of the transverse beam 4 is fixed to the upper column 18, and the upper column 18, the transverse beam 4 and the second column 3b of the first column 3a rotate.
More specifically, a lower column 17 of a columnar first support column 3 a is erected on the upper surface of the carriage 1, a fixed gear 19 is fixed horizontally on the upper end of the lower column 17, and further above the fixed gear 19. In addition, a guide column 20 that is inserted into the cylindrical upper column 18 to be guided is provided in a coaxial manner.

  Then, a motor 21 with a brake is attached to the outer peripheral surface of the upper column 18, a pinion 22 is attached to the rotation shaft of the motor 21 with a brake, and the upper column 18 has a clearance on the peripheral surface of the guide column 20 of the lower column 17. The pinion 22 meshes with the fixed gear 19. Accordingly, the pinion 22 rotates by the rotation of the motor 21 with the brake, the pinion 22 revolves around the fixed gear 19, the upper column 18 rotates around the vertical axis, and the crane assembly 2 is turned. That is, the vertical axis of the first support column 3 a becomes the turning center of the crane assembly 2. The turning motor 21 with a brake may be capable of changing the rotation speed between a low speed and a high speed. Further, since the motor 21 is provided with a brake, the turning position of the crane assembly 2 can be maintained even when the track R has a can.

Further, although not shown in the drawing, the first support column 3a is provided with a limit switch for stopping the turning, and two for stopping the unfolding operation and stopping the storage operation are attached to the first support column 3a and automatically. The turning operation of the crane structure 2 is stopped at a predetermined position.
The turning operation of the crane assembly 2 can be performed by a push button operation in a control box (not shown) provided on the carriage 1.

  Next, the 2nd support | pillar 3b is arrange | positioned in the upper position of the trolley | bogie 1 (the trolley | bogie 1 which makes the crane structure 2 stand up, or the next connection vehicle) in the accommodation state (FIG. 2) of the crane structure 2, and a deployment state. In FIG. 3, the lower end of the track floor B is brought into contact with the track floor B to support the crane structure 2. In other words, as shown in FIG. 5, the lower column 6 of the second column 3b on the other side of the pair of columns 3a and 3b can be bent upward by 180 °. Specifically, the upper end side portion of the lower portion 6 of the second support column 3b and the lower end side portion of the upper portion 23 of the second support column 3b are connected by a hinge having a horizontal axis as a center, and the lower portion centering on that axis. 6 swings with respect to the upper part 23 so as to be bent or linear.

  That is, by making the lower part 6 of the second column 3b bend upward, as shown in FIG. 2, the lowest part of the second column 3b in the bent state is positioned higher than the upper surface of the carriage 1, and the crane structure 2 is It can be set in the storage state. In addition, by extending the lower portion 6 downward and making it linear with the upper portion 23, the lower end surface of the lower portion 6 is positioned lower than the upper surface of the carriage 1 as shown in FIG. be able to.

  Further, returning to FIG. 5, a jack 7 for changing the length of the second column 3b is attached to the tip 6a of the lower portion 6 of the second column 3b. Although not shown, the jack 7 can be a screw jack having a male screw rod that is rotationally driven and a female screw member that is screwed to the male screw rod. Thereby, even if it is a work place where the height of the track floor B changes, the lower surface of the second support column 3b can be firmly brought into contact with the track floor B by adjusting the length.

  In particular, as shown in FIG. 6, even if there is a cant on the track R at the work place (even if the track R is inclined to the left and right), the length of the column can be changed quickly by changing the column length with the jack 7. 3b can function as a support leg for supporting the transverse beam 4. As shown in FIG. 5, a floor plate 24 is provided on the upper surface of the track floor surface B so as not to damage the track floor surface B, and the contact surface of the lower end of the jack 7 is connected to the track floor surface B via the floor plate 24. It is preferable to make it contact | abut.

  Further, even if there is a cant on the trajectory R, as shown in FIG. 7 and FIG. The traverse beam 4 has a rack-shaped member 8 along the longitudinal direction, and the hoisting machine 5 rolls along the rack-shaped member 8 to run the hoisting machine 5 and stops the rack-shaped member. 8 has a pinion (sprocket) 9 for holding the hoisting machine 5 in an arbitrary position.

More specifically, the traverse beam 4 is a steel having an I-shaped cross section, and a chain is attached to the lower surface of the traverse beam 4 as a rack-like member 8 along a longitudinal direction thereof in a straight line.
Then, the hoisting machine 5 traveling in a suspended manner on the transverse beam 4 has wheels 25 that can travel along the concave grooves 26, 26 on both sides of the transverse beam 4 and a chain as the rack-like member 8. And a pinion 9 that meshes and rotates. That is, the pinion 9 is rotated by the rotation of the traverse brake motor 27 of the hoisting machine 5, and the hoisting machine 5 travels along the traversing beam 4.
That is, when the traverse brake-equipped motor 27 is stopped, the rotation of the pinion 9 is restricted, and the hoisting machine 5 does not move along the traverse beam 4.
The rack-shaped member 8 may be a linear gear other than the chain.
Further, the hoisting machine 5 can be, for example, an electric traversing chain block, and if the traversing of the hoisting machine 5 is an inverter control type, the hoisting machine 5 can be accurately stopped at an arbitrary position.

Next, based on the work of replacing the track slab S, the track slab transfer device will be described. As shown in FIG. 1, the device includes two connected carts 1 and 1 traveling on the track R, and And crane structures 2 and 2 provided at two places on the front and rear of the carriage 1. A motor car 28 that travels the entire apparatus along the track R and a spare car 29 that carries and transports work tools, materials, and the like are provided in front and rear of the carriages 1 and 1.
And this apparatus travels and moves from a vehicle base to a work place. At this time, the crane structure 2 is in a storage state in which the second support column 3b is located above the carriage 1 (or the next carriage 1 or the spare vehicle 29), and the crane structure 2 is in the vehicle limit. Yes. The range indicated by the two-dot chain line in FIG. 3 is within the vehicle limit.

Then, in the two trucks 1 and 1 at the work place, the crane structure 2 is turned to the direction orthogonal to the traveling direction (approximately 90 °) to be in the unfolded state, and the lower portion 6 of the second support column 3b that is bent is swung downward. The height is adjusted by the jack 7 and the crane structure 2 is brought into a stable grounding state. As a result, a pair of crane structures 2 and 2 (transverse beams 4 and 4 thereof) in one carriage 1 are parallel to each other.
As shown in FIGS. 1 and 5, the second columns 3b and 3b of the pair of crane structures 2 and 2 in each carriage 1 are connected by a horizontal connecting rod 30 to stabilize the structure. ing.

  Of the two carriages 1 and 1, a pair of crane structures 2 and 2 of the carriage 1 on the leading side (motor car 28 side) is used for removing the existing track slab S, and the rear side A pair of crane structures 2 and 2 of the carriage 1 (on the side of the spare vehicle 29) is used for installing the newly installed track slab S. That is, this apparatus performs the replacement work of the track slab S in order while intermittently proceeding in the direction of arrow A in FIG.

  More specifically, the pair of crane structures 2 and 2 are positioned in the unfolded state so that the traverse beams 4 and 4 in plan view sandwich the track slab S to be replaced from the front and rear in the carriage 1 for removing the head side. Then, both ends of the hanging bracket 12 are suspended from the hoisting machines 5 and 5 of the transverse beams 4 and 4, and the hoisting machines 5 and 5 are moved to a position above the track slab S to be removed. 12 is lowered to an upper proximity position of the track slab S (see FIG. 9).

  The suspension bracket 12 included in the track slab transport device of the present invention is slightly longer than a pair of transverse beams 4 and 4 and wound around both ends as shown in FIGS. A main suspension beam 31 having suspension portions 34 and 34 for hooking the hook 33 of the upper machine 5, and a first sub suspension beam 35 and a second sub suspension beam 36 that are cantilevered in a direction orthogonal to the main suspension beam 31. Have. The first sub-suspending beam 35 protrudes to the left and right sides near the one end and the other end of the main suspension beam 31, and has a first hook 37 that suspends a new track slab S at the tip. The second sub-suspending beam 36 projects to the left and right sides of the main sub-suspending beam 35 at a position closer to the center than the first sub-suspending beam 35, and an existing track slab S is formed at the tip. A second hook 38 is provided.

  Then, the existing orbital slab S is suspended at four points by the four second auxiliary suspension beams 36, lifted by the hoisting machines 5 and 5, and the hoisting machines 5 and 5 are tuned to the transverse beams 4 and 4. The slab is moved to the trolley 1 along the slab mounting space 10 for the existing track slab S on the trolley 1 (in a stacked manner). The existing track slab S may be provided with a lifting tool 39 by inserting an eyebolt, an anchor bolt, or the like at a position corresponding to the upper surface.

  Next, the installation of the new track slab S is carried out by installing a set of crane structures 2 so that the transverse beam 4, 4 in plan view sandwiches an empty space for installing the track slab S from the front and rear sides. , 2 in the unfolded state, both ends of the suspension fitting 12 are suspended from the hoisting machines 5 and 5 of the two transverse beams 4 and 4, and the new track previously stacked and placed in the slab placement space 10 of the carriage 1 The slab S is suspended by a single hanging bracket 12, and the hoisting machines 5 and 5 are moved in synchronization with the installation upper position to suspend the track slab S in an empty space. The new track slab S is previously provided with a lifting tool 40 such as an eyebolt (removable) on the upper surface.

  This removal and installation work is performed while the carriages 1 and 1 are intermittently run, and the lower part 6 of the second support column 3b is adjusted and fixed each time. And when all the work is completed, the crane structure 2 may be accommodated and the carriages 1 and 1 may be returned to the vehicle base.

  Further, in the two carriages 1, 1, the distance P between the left and right center lines C in the same direction as the left-right direction between the two crane structures 2, 2 in the unfolded state provided on each carriage 1 (see FIG. 1). May be set equal to an integral multiple (for example, 2 times or 3 times) of the length (vertical dimension) of the track slab S. Thereby, the installation crane structures 2 and 2 and the removal crane structures 2 and 2 can be operated at the same time in a state where the carts 1 and 1 are stopped (still in the same position).

  As described above, according to the present invention, the bogie 1 traveling on the track R and the hoisting machine 5 that connects the pair of columns 3a and 3b and the columns 3a and 3b and suspends the track slab S are caused to travel. A portal crane body 2 having a transverse beam 4, a first column 3 a on one side of the pair of columns 3 a and 3 b is erected on the carriage 1, and the first column 3 a side is The crane assembly 2 is pivotable as a vertical axis, and the crane assembly 2 is swung in a retracted state in which the longitudinal direction of the transverse beam 4 is the traveling direction side of the carriage 1 and in a direction orthogonal to the traveling direction of the carriage 1. Since the vehicle 1 can be switched to the unfolded state straddling the track slab S adjacent to the track R on which the carriage 1 travels, it can move from the vehicle base to the work place in a short time, and The crane structure 2 can be put into a working state in a short time, Chi can be applied to the work replacement of the orbit for the slab S to.

That is, since the crane assembly 2 is mounted on the carriage 1, the crane assembly 2 can be quickly transported to the work place, and the crane assembly 2 can be easily put into a deployed state by a turning operation. After completion of the work, the crane assembly 2 can be quickly stored in the carriage 1 by a turning operation. Therefore, the preparation work and the withdrawal work at the work place can be completed in a short time, and it is possible to take a long slab replacement work time, thereby improving efficiency.
By placing the crane structure 2 in the retracted state on the carriage 1 by the turning operation, when the carriage 1 travels on the track R and moves, the crane structure 2 can be accommodated within the vehicle limit (dimension limit). The slab transfer device (crane structure 2) does not come into contact with the structure adjacent to the overhead wire or the track R, and can be quickly moved to the work place.

In addition, since the crane assembly 2 is provided at two places on the front and rear of the carriage 1, the track slab S can be hung from both the front and rear sides and is safe.
Furthermore, since the slab mounting space 10 is provided on the carriage 1 between the crane structures 2 and 2 provided at two places on the front and rear of the carriage 1, the existing slab S lifted by the two cranes By translating along the transverse beams 4 and 4 of the structures 2 and 2, the slab S can be loaded in the slab mounting space 10 on the carriage 1, and a new track slab S is mounted. If the slab S is lifted from the cart 1 to be moved and moved in parallel along the transverse beams 4 and 4 of the crane structures 2 and 2, the new slab S can be suspended at the slab installation location. That is, the operation is simple and efficient, and the work can be completed in a short time.

Further, the second support column 3b on the other side of the pair of support columns 3a and 3b is configured such that the lower portion 6 can be bent upward by 180 °, and the tip portion 6a of the lower portion 6 has a jack 7 for changing the length of the support column. Is attached, the lower body 6 can be bent and the crane assembly 2 can be stored, and the lower part 6 can be in a straight line with the upper part 23 so that the lower end surface of the lower part 6 is the upper surface of the carriage 1. It can be brought into contact with the track floor surface B at a lower position.
Furthermore, even in a work place where the height of the track floor B changes, the lower surface of the second support column 3b can be firmly brought into contact with the track floor B. In particular, even if there is a cant on the track R of the work place, the length of the column can be changed by the jack 7 so that it can quickly function as a support leg for supporting the transverse beam 4.

  The transverse beam 4 of the crane structure 2 has a rack-like member 8 along the longitudinal direction, and the hoisting machine 5 rolls along the rack-like member 8 to run the hoisting machine 5 and is stationary. Since the pinion 9 for holding the hoisting machine 5 at an arbitrary position of the rack-like member 8 is provided, the hoisting machine 5 can be safely run even if there is a cant on the track R. It is.

  Also, two connected carriages 1 and 1 traveling on the track R, and crane structures 2 and 2 provided at two positions before and after each carriage 1 are provided, and each crane structure 2 includes a pair of support columns 3a. , 3b and the struts 3a, 3b and a traverse beam 4 for running the hoisting machine 5 that suspends and holds the track slab S, and has a portal shape. The first support column 3a on one side is erected on the carriage 1, and the crane assembly 2 is rotatable with the first support column 3a side as the vertical axis. Is used for removing the existing track slab S, and the pair of crane structures 2 and 2 on the other carriage 1 is used for installing the new track slab S. The swivel operation shortens the preparation work and the withdrawal work at the work place. Therefore, it becomes possible to take much slab replacement work time, and efficiency can be improved. Further, the existing track slab S can be removed and a new track slab S can be quickly installed.

It is a top view which shows one Embodiment of the slab conveyance apparatus for tracks of this invention. It is a side view of the slab conveyance apparatus for tracks. It is a front view of the slab conveyance apparatus for tracks. It is explanatory drawing of the 1st support | pillar of a crane structure. It is explanatory drawing of the 2nd support | pillar of a crane structure. It is a front view of the slab conveyance apparatus for tracks in the track having a cant. It is a side view of a hoisting machine. It is a cross-sectional front view which shows the principal part of a winding machine. It is a top view of a hanging metal fitting. It is a section front view of a hanging metal fitting. It is a section front view of a hanging metal fitting.

Explanation of symbols

1 bogie 2 crane structure 3a support (first support)
3b Strut (second strut)
4 traverse beam 5 hoisting machine 6 lower part 6a tip 7 jack 8 rack-like member 9 pinion
10 Slab placement space R Track S Track slab

Claims (6)

  A bogie (1) traveling on a track (R), a hoisting machine (5) for connecting a pair of struts (3a) (3b) and the struts (3a) (3b) to suspend a track slab (S) (5) ) Having a traverse beam (4) that travels, and the first strut (3a) on one side of the pair of struts (3a) (3b) is the cart. (1) The crane structure (2) is erected on the first pillar (3a) side as a vertical axis, and the crane structure (2) is configured to turn the traverse beam by a turning operation. The storage state in which the longitudinal direction of (4) is the traveling direction side of the carriage (1), and the track (R) that the carriage (1) travels by turning in a direction orthogonal to the traveling direction of the carriage (1). The track slurries are characterized in that they can be switched to a deployed state straddling the track slab (S) next to the track slab. Transport equipment.   The track slab transfer device according to claim 1, wherein the crane structure (2) is provided at two places before and after the carriage (1).   The slab mounting space (10) is provided on the carriage (1) between the crane structures (2) and (2) provided at two places before and after the carriage (1). The slab transfer device for a track as described.   The second strut (3b) on the other side of the pair of struts (3a) (3b) has a lower portion (6) that can be bent upward by 180 °, and a tip (6a) of the lower portion (6). The track slab transfer device according to claim 1, 2 or 3, further comprising a jack (7) for changing the length of the support.   The transverse beam (4) of the crane structure (2) has a rack-like member (8) along the longitudinal direction, and the hoisting machine (5) rolls along the rack-like member (8). It has a pinion (9) for moving and hoisting the hoisting machine (5) and holding the hoisting machine (5) at an arbitrary position of the rack-like member (8). Item 5. A slab transfer device for a track according to item 1, 2, 3 or 4.   Each of the cranes includes two connected carts (1) and (1) traveling on the track (R), and crane structures (2) and (2) provided at two locations before and after each cart (1). The structure (2) has a transverse beam (5) that travels a hoisting machine (5) that connects a pair of struts (3a) (3b) and the struts (3a) (3b) and suspends a track slab (S). 4), and a first column (3a) on one side of the pair of columns (3a) (3b) is erected on the carriage (1), and The crane structure (2) is pivotable with the first column (3a) side as a vertical axis, and a set of crane structures (2) (2) on one of the carts (1) is used for an existing track. The set of crane structures (2) (2) for removing the slab (S) and installing the new track slab (S) Track slab transporting apparatus, characterized in that it is a.

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