Sleeper lifting device

Abstract

To provide a railway sleeper lifting device that reduces labor and time of operation when a railway sleeper is lifted to exchange the railway sleeper.SOLUTION: A railway sleeper lifting device comprises left and right legs 11, 11 provided with wheels at a lower end for travelling on left and right rails 2, a suspending beam 12 provided to connect upper ends of the left and right legs 11, 11, and a lifting machine 14 provided on the suspending beam 12 and provided with a balance type railway sleeper hanging bar 13 for hanging both sides of the railway sleeper 3 with a wire 14c, and at the left and right legs 11, 11, railway sleeper lifting guides 16, 16 which guide the rise of both ends of the balance type railway sleeper hanging bar 13 in the vertical direction are provided.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a McRae lifting device for lifting a McRae that supports a railway rail.

Background Art

[0002] The railway rail is laid on the McRae. However, since the McRae undergoes aging due to long-term use, it is replaced with a new one at regular intervals. Since the weight of the McRae is 100 kg or more per piece, for example, a suspension beam is provided at the upper ends of the left and right legs provided with wheels capable of running on the rail at the lower ends, and a lifting machine such as a chain block is provided on the suspension beam. A McRae lifting device has been proposed that lifts the McRae by a chain that moves up and down by the lifting machine (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the McRae lifting device of Patent Document 1, a long balance-type McRae hanging bar (referred to as a "support bar" in Patent Document 1) is provided at the tip of a single chain that moves up and down by a lifting machine, and the McRae is lifted by hooks provided at both ends of the balance-type McRae hanging bar, and the McRae and the rail are fastened by a rail fastening device. Therefore, there is a problem that the McRae may rotate or sway, and it is necessary to adjust the position of the McRae with respect to the rail, and the work of replacing the McRae takes time and effort.

[0005] In particular, when it comes to sleepers on straight sections of rail, the sleepers need to be installed perpendicular to the rail, whereas when it comes to sleepers on curved sections of rail, it is necessary to create a so-called slack in the inner rail (widening the track gauge). As a result, the work of adjusting the position of the sleepers relative to the rail is burdensome, and replacing sleepers is time-consuming and laborious.

[0006] Therefore, the present invention has been made in view of these various problems, and aims to provide a railway tie lifting device that can reduce the effort and time required when lifting railway ties and replacing them. [Means for solving the problem]

[0007] To solve the aforementioned problems, the railway tie lifting device according to the present invention comprises left and right legs, each equipped with wheels that run on left and right rails at their lower ends; a suspension beam provided to connect the upper ends of the left and right legs; and a lifting machine provided on the suspension beam, each equipped with a balance-type railway tie lifting bar that suspends both sides of a railway tie from the lower ends of a winding member such as a wire or chain. The balance-type railway tie lifting bar is provided with guided portions at both ends, while the left and right legs are each provided with railway tie lifting guide portions that fit into the guided portions at both ends of the balance-type railway tie lifting bar and guide the lifting of the railway tie. Furthermore, the railway tie lifting device according to the present invention is characterized in that the guided portions at both ends of the balance-type railway tie lifting bar each have a rectangular cross-sectional shape, while the railway tie lifting guide portion each has a pair of side plates spaced approximately the same distance apart as the width of the guided portions at both ends of the balance-type railway tie lifting bar, and the guided portion width raising guide portion is provided below the guided portion width raising guide portion and has a pair of side plates continuous with the pair of side plates of the guided portion width raising guide portion, and the distance between the pair of side plates gradually widens from approximately the same distance as the width of the guided portion as it goes downwards, so that the lower the balance-type railway tie lifting bar is, the easier it is to insert the guided portion, and when the balance-type railway tie lifting bar rises, the guided portion is guided to the guided portion width raising guide portion. Furthermore, the railway sleeper lifting device according to the present invention is characterized in that the rail is fixed via an insulator by a wire spring passed through a wire spring hole in the shoulder provided on the sleeper, and a gap-holding portion of the insulator is inserted into the gap between the rail and the shoulder, and on both sides of the balance-type sleeper lifting bar there are a shoulder insertion member which is inserted into the wire spring hole of the shoulder via a lifting material inside the guided portion, and an insulator gap-securing member which is fitted onto the shoulder insertion member and secures the gap between the rail and the shoulder for inserting the gap-holding portion of the insulator. Furthermore, the sleeper lifting device according to the present invention is characterized in that the insulator gap securing member has a shoulder insertion member fitting hole into which the shoulder insertion member is inserted, and there are multiple sizes of the member depending on the width of the gap holding portion of the insulator, and the size is selected according to the width of the gap holding portion of the insulator used when fixing the rail and inserted into the shoulder insertion member. Furthermore, the railway tie lifting device according to the present invention is also characterized in that the lifting machine is provided on one leg side in the longitudinal direction of the suspension beam, and a pulley is provided at the midpoint in the longitudinal direction of the suspension beam to change the direction of the hoisting member lifted by the lifting machine downwards. [Effects of the Invention]

[0008] The railway tie lifting device according to the present invention comprises left and right legs, a suspension beam provided to connect the upper ends of the left and right legs, and a lifting machine provided on the suspension beam and equipped with a balance-type railway tie lifting bar for suspending both sides of the railway tie. The left and right legs are each provided with railway tie lifting guide sections that guide the vertical upward movement of both ends of the balance-type railway tie lifting bar. Therefore, the time and effort required for replacing railway ties can be reduced, and the lifting operation during tie replacement can be simplified and manpower-saving. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view showing the sleeper lifting device according to an embodiment of the present invention installed on a rail. [Figure 2] This is a front view showing the sleeper lifting device according to an embodiment of the present invention installed on a rail. [Figure 3] This is an enlarged front view of the main part of section A in Figure 2. [Figure 4] This is a rear view showing the sleeper lifting device according to an embodiment of the present invention installed on a rail. [Figure 5] This is an enlarged rear view of the main part of section B in Figure 4. [Figure 6] This is a plan view showing the sleeper lifting device according to an embodiment of the present invention installed on a rail. [Figure 7] Figure 6 is a cross-sectional view along the CC line. [Figure 8] This is a right side view showing the sleeper lifting device according to an embodiment of the present invention installed on a rail. [Figure 9]Figure 8 is a cross-sectional view along the EE line. [Figure 10] Figure 8 is a cross-sectional view along the FF line. [Figure 11] (a) and (b) are perspective views showing the combination of the sleeper lifting fittings, shoulder insertion members, and insulator gap-securing members provided at the lower ends of the chains at both ends of the balance-type sleeper lifting bar of the sleeper lifting device according to the embodiment of the present invention, and a perspective view showing the state in which the insulator gap-securing members have been removed from the shoulder insertion members. [Figure 12] (a) and (b) are front views showing the combination of the sleeper lifting fittings, shoulder insertion member and insulator gap securing member provided at the lower ends of the chains at both ends of the balance-type sleeper lifting bar of the sleeper lifting device according to the embodiment of the present invention, and the state in which the insulator gap securing member has been removed from the shoulder insertion member. [Figure 13] (a) and (b) are a plan view and a right side view, respectively, showing the combination of the sleeper lifting fittings, shoulder insertion members, and insulator gap securing members provided at the lower ends of the chains at both ends of the balance-type sleeper lifting bar of the sleeper lifting device according to the embodiment of the present invention. [Figure 14] (a) and (b) are a plan view and a perspective view of the main parts, respectively, showing the state near the rail fastening device in which the sleeper is lifted by inserting the shoulder insertion members, which are provided at the lower ends of the chains at both ends of the balance-type sleeper lifting bar of the sleeper lifting device according to the embodiment of the present invention, into the wire spring holes of the shoulders. [Figure 15] This is a front view of the main part of the rail fastening device showing the state near the rail fastening device in which the rail sleeper is being lifted by inserting the shoulder insertion members, which are provided at the lower ends of the chains at both ends of the balance-type rail sleeper lifting bar of an embodiment of the present invention, into the wire spring holes of the shoulders. [Figure 16] (a) to (c) are, respectively, a plan view of an insulator used in a rail fastening device for a sleeper lifted by a sleeper lifting device according to an embodiment of the present invention, a diagram (table) showing the width and color types of the gap-holding portion of the insulator, and a front view of an example of a gap-securing member for the insulator.

Embodiments for Carrying out the Invention

[0010] Next, embodiments of the McClary lifting device according to the present invention will be described in detail while referring to the drawings. It should be noted that the embodiments described below are merely examples of the present invention, and the present invention is not limited to the embodiments described below and can be appropriately modified within the scope of the technical idea of the present invention.

[0011] <Configuration of the McClary Lifting Device 1 in the Embodiment> The McClary lifting device 1 in the embodiment according to the present invention includes left and right legs 11, 11, a suspension beam 12, a balance-type McClary suspension bar 13, a lifting machine 14, a pulley 15, a McClary lifting guide portion 16, etc., as shown in FIGS. 1 to 10, and is configured to be able to lift the McClary 3. Incidentally, before explaining the configuration of the McClary lifting device 1 in the embodiment, the McClary 3 to be lifted and replaced in this embodiment will be explained.

[0012] (McClary 3) The McClary 3 to be lifted and replaced by the McClary lifting device 1 in the embodiment is a concrete McClary in which a high-tensile PC steel material called a PC (Prestressed Concrete) McClary is used to apply a compressive force to the concrete in advance. Such a McClary 3 is provided with rail fastening devices 4 for each of the left and right rails 2, 2 with a gap only between the rail pitches. The left and right rail fastening devices 4, 4 are configured to fasten (fix) the bottom of the rail 2 through an insulator 43 by passing a wire spring 42 called an "e clip" or the like through wire spring holes 41a provided in shoulders 41, 41 separated by the width of the bottom of the rail 2, respectively. However, the McClary 3 lifted by the McClary lifting device according to the present invention is not limited to the McClary 3 that fixes the rail 2 by the wire spring 42. For example, a McClary 3 having a structure that fixes the rail 2 by a so-called fast clip (not shown) or the like is also acceptable, and is not limited to the fixing form of the rail 2.

[0013] (Leg 11) The left and right legs 11, 11 each consist of a front leg 11a with a front wheel 11a1 that runs on the rail 2 rotatably mounted on a front wheel support 11a2 at its lower end, a rear leg 11b with a rear wheel 11b1 that runs on the rail 2 rotatably mounted on a rear wheel support 11b2 at its lower end, a first connecting bar 11c whose ends are welded to horizontally connect the lower inner surface of the front leg 11a and the lower inner surface of the rear leg 11b, and a front leg 11c at a position higher than the first connecting bar 11c The structure includes a second connecting bar 11d which is shorter in length than the first connecting bar 11c whose ends are welded to horizontally connect the inner surface of the leg portion 11a and the inner surface of the rear leg portion 11b, and an upper connecting bar 11e which is joined to the lower surface of the upper end of the front leg portion 11a and the upper end of the rear leg portion 11b by welding or the like at an interval shorter than the length of the second connecting bar 11d. In side view, it has a trapezoidal shape, and the tip of the upper connecting bar 11e protrudes forward from the front leg portion 11a.

[0014] Slightly above the joints between the front leg portion 11a and the rear leg portion 11b and the second connecting bar 11d, tool rests 11a3 and 11b3 are provided for placing tools such as an electric screwdriver (not shown) that fastens the wire spring 42.

[0015] A sleeper lifting guide section 16, described later, is provided at the midpoint of the first connecting bar 11c in the longitudinal direction and at the midpoint of the second connecting bar 11d, by welding or the like, extending in the vertical direction.

[0016] Furthermore, the rear wheel support section 11b2 is provided with a well-known brake section 11f for applying the brakes to the rear wheel 11b1. In addition, the tip of the upper connecting bar 11e is provided with a ring 11e1 for suspending tools used when replacing the sleeper 3, while the rear end of the upper connecting bar 11e is provided with a handle 11e2 for the worker to grasp.

[0017] (Suspension beam 12) The suspension beam 12 is composed of two long steel members 2a, 2a that are welded or otherwise attached to the upper surfaces of the upper connecting bars 11e, 11e provided at the upper ends of the left and right legs 11, 11, and are installed at a predetermined distance apart to connect the upper ends of the left and right legs 11, 11. A lifting machine 14 is provided on one of the legs 11 in the longitudinal direction, while a pulley 15 is provided at the midpoint in the longitudinal direction. The pulley 15 is configured to change the direction of the wire 14c, which is a hoisting member that the lifting machine 14 winds up, from the horizontal direction to the vertical direction.

[0018] (Balance-type railway tie suspension bar 13) The balance beam type sleeper suspension bar 13 is constructed by welding or otherwise attaching an upper reinforcing flange plate 13a1 and a lower reinforcing flange plate 13a2 to the upper and lower sides of a sleeper suspension bar body 13a made of a steel pipe with a square cross-section and a length slightly shorter than the track gauge. At the midpoint in the longitudinal direction, a U-shaped hook 13b is provided by welding or otherwise attaching to the lower end hook 14d of the wire 14c, which is a hoisting member that is wound up by the lifting machine 14.

[0019] Furthermore, at both ends of the balance-type sleeper suspension bar 13, there are guided portions 13c, 13c with a square cross-section that are guided vertically by sleeper lifting guide portions 16, 16 that extend vertically and are provided on the left and right legs 11, 11, respectively. Inside the guided portions 13c, 13c, there are chain suspension portions 13d, 13d, with a chain 13d1, which is a suspension material, attached to its lower end. The chain 13d1, 13d1 is equipped with sleeper suspension fittings 13e, 13e, shoulder insertion members 13f, 13f, and insulator gap securing members 13g, 13g, etc.

[0020] The chain suspension sections 13d, 13d are provided so as to surround the four sides of the square-shaped guided sections 13c, 13c, and when they surround the four sides of the guided sections 13c, 13c, they come into contact with a pair of side surfaces of the sleeper lifting guide sections 16, 16.

[0021] Each of the railway tie hangers 13e, 13e is formed in an L-shape when viewed from the front, with horizontal sections 13e1, 13e1 to which the lower end of the chain 13d1 is attached, and vertical sections 13e2, 13e2 extending downward from the opposite side of the horizontal sections 13e1, 13e1. Shoulder insertion members 13f, 13f are attached to the lower ends of the vertical sections 13e2, 13e2 so as to extend parallel to the horizontal sections 13e1, 13e1 with a gap between them.

[0022] The shoulder insertion members 13f, 13f are inserted into the wire spring hole 41a in the shoulder 41 into which the wire spring 42 is inserted, and function as hooks for attaching to the sleeper 3 to which the shoulder 41 is fixed. They consist of shoulder insertion member base portions 13f1, 13f1, which have an outer diameter larger than the inner diameter of the wire spring hole 41a and are not inserted into the wire spring hole 41a, and wire spring hole insertion portions 13f2, 13f2, which are provided continuously with the shoulder insertion member base portions 13f1, 13f1 and are inserted into the wire spring hole 41a.

[0023] The insulator gap-securing member 13g is used by fitting it into the shoulder insertion member 13f, as shown in Figures 11 to 13, and is a member that secures a gap for inserting the gap-holding portion 43a of the insulator 43 between the rail 2 and the shoulder 41. The shoulder insertion member fitting hole 13g1 is approximately the same as the outer diameter of the shoulder insertion member base 13f1 of the shoulder insertion member 13f (see Figures 12(a) and (b)) into which the shoulder insertion member base 13f1 is inserted and fitted, and a cross-shaped suspension fitting horizontal portion through groove 13g2 is provided for passing the horizontal portion 13e1 of the sleeper suspension fitting 13e through.

[0024] The gap-securing member 13g for the insulator comes in multiple sizes depending on the width D of the gap-holding portion 43a of the insulator 43 (see Figure 16(a)). In this embodiment, as shown in Figure 16(b), six types of insulators 43 are prepared, ranging from 8 mm for "Insulator No." "0" to 13 mm for "5", and are distinguished by colors ranging from blue to yellow.

[0025] Therefore, as shown in Figure 16(c), the gap-securing member 13g for the insulator is prepared in multiple types, with the width L of the insulator gap-securing member 13g varying according to the width D of the gap-holding portion 43a of the insulator 43 (see Figure 16(a)) relative to the center of the shoulder insertion member fitting hole 13g1 into which the shoulder insertion member 13f is inserted, and numbers corresponding to the "insulator No." are engraved on both sides. Note that the gap-securing member 13g for the insulator shown in Figure 16(c) corresponds to an insulator 43 with a width of 8mm for "insulator No." "0" on the width L0 side and an insulator 43 with a width of 11mm for "insulator No." "3" on the width L3 side. When this gap-securing member 13g for the insulator is used as shown in Figure 15, a gap of 8mm between the insulators 43 on the inside of the rail gauge 2 and 13mm on the outside of the rail gauge can be pre-secured.

[0026] (Lifting machine 14) The lifting machine 14 is fixed to one of the longitudinal legs 11 of the suspension beam 12. By having a worker grasp the rotating handle 14b of the reel 14a and rotate it, the wire 14c, which is a hoisting member wound around the reel 14a, is raised. The hook 14d provided at the lower end of the wire 14c is then attached to the U-shaped hook 13b of the balance-type sleeper suspension bar 13, and the sleeper 3 is lifted via the balance-type sleeper suspension bar 13. This is a manual winch.

[0027] Furthermore, the lifting device 14 is not limited to a manual winch that manually winds up the wire 14c; it may also be an electric winch that electrically winds up the wire 14c, or even a chain or the like may be used as the winding component instead of the wire 14c. Therefore, when a chain is used as the winding component, the lifting device 14 will be a chain block or the like.

[0028] (Pulley 15) The pulley 15 is installed at the midpoint of the suspension beam 12 in the longitudinal direction, as the reel 14a of the hoisting machine 14 is installed at one end of the suspension beam 12, and the pulley 15 changes the direction of the wire 14c downwards from the midpoint of the suspension beam 12 in the longitudinal direction.

[0029] (Sleeper lifting guide section 16) The sleeper lifting guide section 16 is provided to extend vertically by connecting the midpoints of the first connecting bar 11c and the second connecting bar 11d of the leg section 11, and is a guide section that guides the lifting of the balance-type sleeper lifting bar 13 by fitting the square-shaped guided sections 13c and 13 provided at both ends of the balance-type sleeper lifting bar 13 into it, and has a guided section width raising guide section 16a and a guided section insertion guide section 16b.

[0030] The guided portion width raising guide portion 16a has a back plate portion 16a1 and a pair of side plate portions 16a2, 16a2 provided by bending 90 degrees from both sides of the back plate portion 16a1. The distance W1 between the pair of side plate portions 16a2, 16a2, which is the width of the back plate portion 16a1, is made to be approximately the same as or slightly larger than the width W2 of the guided portions 13c, 13c, so that the guided portions 13c, 13c fit between the pair of side plate portions 16a2, 16a2 and are guided to rise.

[0031] The guided section insertion guide section 16b is provided below the guided section width raising guide section 16a and is continuous with the back plate section 16a1 of the guided section width raising guide section 16a. It has a trapezoidal back plate section 16b1 that widens as it goes downwards, and a pair of side plate sections 16a2, 16a2 that are continuous with the pair of side plate sections 16a2, 16a2 of the guided section width raising guide section 16a. The distance between the pair of side plate sections 16a2, 16a2 gradually widens from the width W1 of the guided sections 13c, 13c as it goes downwards. This makes it easier to insert the guided sections 13c, 13c as the balance-type sleeper suspension bar 13 is positioned lower, and as the balance-type sleeper suspension bar 13 rises, it guides the guided sections 13c, 13c to the guided section width raising guide section 16a, improving work efficiency.

[0032] <Operation of the railway tie lifting device according to the embodiment of the present invention> Next, the operation of the railway tie lifting device 1 according to the embodiment of the present invention, configured as described above, will be explained.

[0033] (Move to the position of sleeper 3 that needs replacing) In the case of the sleeper lifting device 1 according to the embodiment of the present invention, since the left and right legs 11, 11 are each provided with a front wheel 11a1 and a rear wheel 11b1, the worker grasps the handles 11e2 provided on each of the left and right legs 11, 11 and pushes the sleeper lifting device 1 along the rails 2, 2 to move to the position of the sleeper 3 to be replaced.

[0034] Furthermore, in the case of the sleeper lifting device 1 of the embodiment according to the present invention, the reel 14a of the lifting machine 14 is provided on one leg 11 side in the longitudinal direction of the suspension beam 12. Therefore, unlike when a lifting machine such as a chain block is provided at the midpoint in the longitudinal direction of the suspension beam 12, it becomes possible for two workers to perform the work on each of the left and right leg 11, 11 sides, thereby improving the work efficiency when replacing sleepers 3.

[0035] (Lifting the new railway tie 3) When the worker reaches the position of the sleeper 3 to be replaced, the worker on one of the left and right legs 11, 11 inserts the shoulder insertion member 13f into the wire spring hole 41a of the shoulder 41 fixed to the sleeper 3, and hooks both sides of the sleeper 3 to both sides of the balance-type sleeper suspension bar 13 via chains 13d1, 13d1, etc., while the worker on the other side rotates the handle 14b of the lifting machine 14 to lift the sleeper 3.

[0036] As described above, since the reel 14a of the lifting machine 14 is provided on one of the legs 11 in the longitudinal direction of the suspension beam 12, it is possible to operate the reel 14a of the lifting machine 14 without moving to the midpoint of the suspension beam 12, thereby improving work efficiency compared to the case where the lifting machine 14, such as a chain block, is provided at the midpoint of the suspension beam 12.

[0037] Furthermore, when lifting the sleeper 3, the guided sections 13c, 13c provided at both ends of the balance-type sleeper lifting bar 13 are guided by the vertically extending sleeper lifting guide sections 16 provided on the left and right legs 11, 11. Therefore, when lifting the sleeper 3 via the balance-type sleeper lifting bar 13 using a single wire 14c, it becomes possible to lift the sleeper 3 without it rotating, even if a worker does not hold it down. In this respect as well, the work efficiency when replacing sleepers can be improved.

[0038] In particular, the sleeper lifting guide section 16 of this embodiment has a guided section width increase guide section 16a, where the distance W1 between a pair of side plate sections 16a2, 16a2 is approximately the same as or slightly larger than the width W2 of the guided sections 13c, 13c, and guides the upward movement of the guided sections 13c, 13c. Furthermore, below this, there is a guided section insertion guide section 16b, where the distance between the side plate sections 16a2, 16a2 of the guided section width increase guide section 16a gradually widens as it goes downwards. Therefore, even when the balance-type sleeper lifting bar 13 is lifting a heavy sleeper 3, the guided sections 13c, 13c at both ends of the balance-type sleeper lifting bar 13 can be easily inserted into the sleeper lifting guide sections 16, 16 to guide their upward movement, thus improving work efficiency when replacing sleepers.

[0039] Furthermore, when the shoulder insertion member 13f is inserted into the wire spring hole 41a of the shoulder 41 fixed to the sleeper 3, the shoulder insertion member 13f is fitted with an insulator gap securing member 13g whose width corresponds to the width D of the gap holding portion 43a of the insulator 43 used when fixing the rail 2 (see Figure 16(a)).

[0040] (Insertion of shoulder insertion member 13f) When the shoulder insertion member 13f is inserted into the wire spring hole 41a of the shoulder 41 fixed to the sleeper 3 and the sleeper 3 is hooked and lifted, the shoulder insertion member 13f is fitted with an insulator gap securing member 13g whose width corresponds to the width D (see Figure 16(a)) of the gap holding portion 43a of the insulator 43 used when fixing the rail 2, so that a gap is secured between the bottom of the rail 2 and the shoulder 41 for inserting the insulator 43.

[0041] Therefore, when the new sleeper 3 is lifted and brought into contact with the bottom surface of the rail 2, the worker inserts the insulators 43 on the inside and outside of the rail 2, respectively, based on the gap secured between the bottom of the rail 2 and the shoulder 41 by the insulator gap-securing member 13g.

[0042] As a result, the gap-securing member 13g for the insulator secures a gap between the bottom of the rail 2 and the shoulder 41 for inserting the insulator 43, and the position of the bottom of the rail 2 on the sleeper 3 can be determined, thus simplifying the insertion work of the insulator 43 on both the inside and outside of the rail 2.

[0043] Furthermore, in Figure 15, since the insulator gap-securing member 13g, which has widths of 11mm and 8mm on the left and right sides, respectively, is used, a gap of 8mm is pre-maintained between the insulators 43 on the inside of the rail gauge 2 and 13mm on the outside of the rail gauge. As a result, the width D of the gap-securing part 43a (see Figure 16(a)) is 8mm, and the 13mm insulators 43 can be inserted between the bottom of the rail 2 and the shoulder 41, respectively.

[0044] (Fastening between the outside of rail 2 and sleeper 3) Once the insertion of the insulators 43 is complete on both the inside and outside of the rail 2, the worker fastens the rail 2 and the sleeper 3 by inserting the wire springs 42 into the wire spring holes 41a of the shoulder 41 from the outside of the rail 2, where the shoulder insertion members 13f have not been inserted, at both ends of the sleeper 3.

[0045] (Removal of shoulder insertion member 13f and retraction of sleeper lifting device 1) Once the fastening of the new sleeper 3 to the outside of rail 2 is complete, one worker reverses the handle 14b of the reel 14a of the lifting machine 14 to loosen the tension of the chain 13d1 of the balance-type sleeper suspension bar 13 and the wire 14c of the lifting machine 14 that were suspending the sleeper 3.

[0046] If the tension on the chain 13d1 of the balance-type sleeper suspension bar 13 that was suspending the sleeper 3, or the wire 14c of the lifting machine 14, etc., loosens, for example, the other worker may remove the shoulder insertion member 13f that was inserted into the wire spring hole 41a of the shoulder 41 on the inside of the rail 2 from the wire spring hole 41a, and pull the sleeper lifting device 1 of the embodiment to move the sleeper lifting device 1 away from the sleeper 3.

[0047] (Fastening between the inside of rail 2 and sleeper 3) When the shoulder insertion member 13f is removed from the wire spring hole 41a of the inner shoulder 41 of the rail 2, the workers on both the left and right sides insert the wire spring 42 into the wire spring hole 41a of the inner shoulder 41 on the left and right rails 2, respectively, completing the fastening of the rails 2 on both the inside and outside to the sleepers 3.

[0048] (Move to the next railway tie 3 and conclude the connection with railway tie 3) Once the fastening of the rail 2 to the sleeper 3 on both sides is complete, the workers on the left and right sides grasp the handles 11e2, 11e2 provided on the left and right legs 11, 11 respectively, push the sleeper lifting device 1, and move along the rail 2, 2 to the position of the next sleeper 3 to be replaced.

[0049] <Summary of the railway tie lifting device 1 according to the embodiment of the present invention> As described above, the railway tie lifting device 1 according to the embodiment of the present invention comprises left and right leg portions 11, 11, a suspension beam 12 provided to connect the upper ends of the left and right leg portions 11, 11, and a lifting machine 14 provided on the suspension beam 12 and equipped with a balance-type railway tie lifting bar 13 for suspending both sides of the railway tie 3. The left and right leg portions 11, 11 are each provided with railway tie lifting guide portions 16, 16 into which the guided portions 13c, 13c at both ends of the balance-type railway tie lifting bar 13 are fitted to guide upward movement in the vertical direction.

[0050] Therefore, when lifting and replacing the sleeper 3, the guided portions 13c, 13c at both ends of the balance-type sleeper lifting bar 13 that suspends both ends of the sleeper 3 are guided by the sleeper lifting guide portions 16, 16 of the left and right legs 11, 11, respectively, which suppresses the rotation of the sleeper 3. This reduces the effort and time required for replacing the sleeper 3, and simplifies and reduces the manpower required for lifting when replacing sleepers.

[0051] Furthermore, in the sleeper lifting device 1 of the embodiment of the present invention, the left and right legs 11, 11 each have a front leg 11a with a front wheel 11a1 at its lower end, a rear leg 11b with a rear wheel 11b1 at its lower end, a first connecting bar 11c provided to horizontally connect the lower part of the front leg 11a and the lower part of the rear leg 11b, and a second connecting bar 11d provided to horizontally connect the front leg 11a and the rear leg 11b at a position higher than the first connecting bar 11c, and the sleeper lifting guide section 16 is provided to connect the midpoint of the first connecting bar 11c and the midpoint of the second connecting bar 11d.

[0052] Therefore, the sleeper 3 can be reliably lifted at a right angle to the left and right rails 2,2 by the sleeper lifting guides 16,16, which in turn reduces the effort and time required for replacing the sleeper 3, thereby simplifying and reducing the manpower required for lifting when replacing sleepers.

[0053] Furthermore, in the sleeper lifting device 1 of the embodiment of the present invention, the guided portions 13c, 13c at both ends of the balance-type sleeper lifting bar 13 are formed in a rectangular cross-sectional shape, while the sleeper lifting guide portions 16, 16 each have a pair of side plate portions 16a2, 16a2 spaced approximately the same width as the guided portions 13c, 13c at both ends of the balance-type sleeper lifting bar 13, and the guided portion width raising guide portion 16a and the guided portion width raising guide portion 16 A guided section insertion guide section 16b is provided below a, and has a pair of side plate sections 16a2, 16a2 that are continuous with the pair of side plate sections 16a2, 16a2 of the guided section width raising guide section 16a, and the distance between the pair of side plate sections 16a2, 16a2 gradually widens from approximately the same distance as the width of the guided sections 13c, 13c as it goes downwards, so that the lower the balance-type sleeper suspension bar 13 is positioned, the easier it is to insert the guided sections 13c, 13c, and when the balance-type sleeper suspension bar 13 rises, it guides the guided sections 13c, 13c to the guided section width raising guide section 16a.

[0054] Therefore, when lifting the sleeper 3 by attaching it to the balance-type sleeper suspension bar 13, the guided portions 13c, 13c at both ends of the balance-type sleeper suspension bar 13 can initially be easily inserted into the flared guided portion insertion guide portions 16b, 16b of the sleeper lifting guide portions 16, 16, so that the heavy sleeper 3 can be easily fitted into the sleeper lifting guide portions 16, 16 and lifted. Furthermore, as the balance-type sleeper suspension bar 13 rises, it is guided by the guided portion width raising guide portion 16a, which guides the lifting in a state perpendicular to the longitudinal direction of the rail 2. As a result, when fastening the lifted sleeper 3 to the rail 2, it becomes unnecessary to adjust the horizontal angle of the sleeper 3, reducing the effort and time required for sleeper replacement work, and simplifying and reducing the manpower required for lifting work during sleeper replacement.

[0055] Furthermore, in the sleeper lifting device 1 of the embodiment of the present invention, the rail 2 is fixed via an insulator 43 by a wire spring 42 passed through a wire spring hole 41a of a shoulder 41 provided on the sleeper 3, and insulator gap holding parts 13g, 13g are inserted in the gap between the rail 2 and the shoulder 41, and on both sides of the balance-type sleeper lifting bar 13 there is a shoulder insertion member 13f which is inserted into the wire spring hole 41a of the shoulder 41 via a chain 13d1, 13d1 which is a lifting material, inside the guided part 13c, and an insulator gap securing member 13g which is fitted onto the shoulder insertion member 13f and secures a gap for inserting the insulator gap holding parts 13g, 13g between the rail 2 and the shoulder 41.

[0056] Therefore, when the sleeper 3 is lifted by the sleeper lifting device 1 of the embodiment and fastened to the rail 2, the gap securing member 13g for the insulator secures a gap in advance for inserting the insulator 43. As a result, while the sleeper 3 is being lifted, the gap securing member 13g for the insulator secures a gap perpendicular to the longitudinal direction of the rail 2. This makes it possible to secure a gap between the shoulder 41 of the sleeper 3 on the inside of the track gauge and the bottom of the rail 2 for inserting a specified insulator 43 from among the six types of insulators 43 for slack setting, thereby reducing the effort and time required for replacing the sleeper 3.

[0057] As a result, the guided portions 13c, 13c at both ends of the balance-type sleeper suspension bar 13 and the sleeper lifting guide portions 16, 16 suppress the rotation and shaking of the sleeper 3, making it easier to position it in the longitudinal direction of the rail 2. In addition, the gap-securing member 13g for the insulator, which is pre-fitted into the shoulder insertion member 13f, makes it easier to position the sleeper 3 in a direction perpendicular to the longitudinal direction of the rail 2, thus greatly simplifying the position adjustment work for the sleeper 3.

[0058] Furthermore, in the sleeper lifting device 1 of the embodiment according to the present invention, the insulator gap securing member 13g has a shoulder insertion member fitting hole 13g1 into which the shoulder insertion member 13f is inserted, and there are six different sizes depending on the width of the insulator gap holding parts 13g,13g, and the size is selected according to the width of the insulator gap holding parts 13g,13g used when fixing the rail 2 and inserted into the shoulder insertion member 13f.

[0059] Therefore, by changing the size of the insulator gap-holding parts 13g, 13g inserted into the shoulder insertion member 13f according to the work site where the sleeper 3 is being replaced, it becomes easier to set slack in curved sections of the rail 2, and in this respect as well, the effort and time required for replacing the sleeper 3 can be reduced.

[0060] Furthermore, in the sleeper lifting device 1 of the embodiment according to the present invention, the lifting machine 14 is provided at the end of one leg portion 11 in the longitudinal direction of the suspension beam 12, and a pulley 15 is provided at the midpoint in the longitudinal direction of the suspension beam 12 to change the direction of the wire 14c, which is a hoisting member lifted by the lifting machine 14, downward.

[0061] Therefore, unlike the sleeper lifting device in Patent Document 1, it is no longer necessary to move to the midpoint of the suspension beam 12 when lifting the sleeper 3, thus reducing the movement of workers and reducing the burden on workers and enabling labor savings. For example, in a three-worker system where one worker is stationed on each of the left and right rails 2,2 to tighten the rail fastening device 4, and one worker is stationed between the rails 2,2 to rotate the lifting machine 14, the worker on the rail 2 side where the lifting machine 14 is installed can rotate the lifting machine 14, making it possible for two workers to perform the sleeper 3 replacement work, thereby enabling labor savings.

[0062] In the above description of the embodiment, the lifting machine 14 was described as lifting the sleeper 3 by winding up a wire 14c as the hoisting member. However, the present invention is not limited to this, and it is also possible to configure the device to lift the sleeper 3 by winding up a chain or the like as the hoisting member. [Explanation of symbols]

[0063] 1. Railway tie lifting device 11 Legs 11a Front leg 11a1 front wheel 11a2 Front wheel support part 11a3 Tool stand 11b Posterior leg 11b1 rear wheel 11b2 Rear wheel support part 11b3 Tool stand 11c First connecting bar 11d Second connecting bar 11e Upper connecting bar 11e1 Round ring 11e2 handle 11f Brake section 12 Suspension beams 12a steel material 13 Balance-type railway tie suspension bar 13a Sleeper suspension bar body 13a1 Upper reinforcing flange plate 13a2 Lower reinforcing flange plate 13b U-shaped hook 13c Guided part 13d Chain suspension part 13d1 chain 13e Railway tie hanger 13e1 Horizontal section 13e11 Connecting pin 13e2 Vertical section 13f Shoulder insertion member 13f1 Shoulder insertion member base 13f2 Wire spring hole insertion part 13g Gap-securing member for insulators 13g1 Shoulder insertion member fitting hole 13g2 Hanging bracket horizontal section through groove 14 Lifting machine 14a Reel 14b Handle 14c wire (winding component) 15 Pulleys 16. Railway tie lifting guide section 16a Guide section for raising the width of the guided section 16a1 Back plate part 16a2 Side plate part 16b Guided part insertion guide part 16b1 back plate 16b2 Side plate part 2 rails 3 railway ties 4 Rail fastening device 41 Shoulder 41a Wire spring hole 42 wire spring 43 Insulators 43a Gap holding part 43a

Claims

1. The left and right legs are equipped with wheels that run on rails on the left and right sides at their lower ends, A suspension beam is provided to connect the upper ends of the left and right legs, The lifting machine is provided on the aforementioned suspension beam and has a balance-type sleeper suspension bar attached to the lower end of a hoisting member such as a wire or chain, which suspends both sides of the sleeper. Guided portions are provided at both ends of the aforementioned balance-type sleeper suspension bar, A railway sleeper lifting device characterized in that the left and right legs are each fitted with the guided portions at both ends of the balance-type railway sleeper lifting bar, and railway sleeper lifting guide portions are provided to guide the lifting of the railway sleepers.

2. In the railway tie lifting device according to claim 1, The guided portions at both ends of the aforementioned balance-type sleeper suspension bar each have a rectangular cross-sectional shape, Each of the aforementioned sleeper lifting guide sections has a pair of side plates spaced approximately the same distance apart as the width of the guided section at each end of the balance-type sleeper lifting bar, and a guided section width raising guide section between the pair of side plates into which the guided section fits and guides the upward movement of the guided section. A railway sleeper lifting device characterized by having a guided portion insertion guide portion provided below the guided portion width raising guide portion, having a pair of side plates continuous with the pair of side plates of the guided portion width raising guide portion, wherein the distance between the pair of side plates gradually widens from approximately the same distance as the width of the guided portion as it goes downwards, so that the lower the balance-type sleeper suspension bar is positioned, the easier it is to insert the guided portion, and when the balance-type sleeper suspension bar rises, the guided portion is guided to the guided portion width raising guide portion.

3. In the railway tie lifting device according to claim 1, The rail is fixed via an insulator by a wire spring that passes through a wire spring hole in the shoulder provided in the sleeper, and a gap-holding part of the insulator is inserted into the gap between the rail and the shoulder. A sleeper lifting device characterized in that, on both sides of the balance-type sleeper suspension bar, there is a shoulder insertion member that is inserted into the wire spring hole of the shoulder via a suspension material, located inward from the guided portion, and an insulator gap securing member that is fitted onto the shoulder insertion member and secures the gap for inserting the gap-holding portion of the insulator between the rail and the shoulder.

4. In the railway tie lifting device according to claim 3, The aforementioned gap-securing member for the insulator is, A sleeper lifting device characterized in that a shoulder insertion member fitting hole is provided into which the shoulder insertion member is inserted, and there are multiple sizes of the shoulder insertion member depending on the width of the gap-holding portion of the insulator, and the size is selected according to the width of the gap-holding portion of the insulator used when fixing the rail and inserted into the shoulder insertion member.

5. A railway tie lifting device according to any one of claims 1 to 4, A railway sleeper lifting device characterized in that the lifting machine is provided on one leg side in the longitudinal direction of the suspension beam, and a pulley is provided at the midpoint in the longitudinal direction of the suspension beam to change the direction of the hoisting member lifted by the lifting machine downwards.

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