JP7440871B2 - sleeper replacement aid - Google Patents

Description

The present invention relates to a sleeper replacement aid that brings the top surface of the sleeper closer to the bottom surface of the rail during sleeper replacement work.

Conventionally, in sleeper replacement work, when the track bed is dug, the old sleeper is pulled out, and the new sleeper is inserted, the new sleeper is pulled up to the bottom of the rail that is floating in the air and brought into close contact with the rail. Use a sleeper hoist, etc.

Patent No. 3429235

However, in sleeper replacement work, when a jack is installed on the bottom of the new sleeper and the new sleeper is pulled up to the bottom of the rail that is floating in the air and brought into close contact, the track bed is dug down by the amount of the jack in order to install the jack under the sleeper. However, there was a problem in that the burden on the workers was extremely heavy.

In addition, when using the sleeper lifter described in Patent Document 1 to lift the new sleeper to the bottom of the rail floating in the air and bring it into close contact with the bottom of the rail, there is no need to dig into the track bed, and the hook at the lower end of the chain block can be attached to the sleeper. Because it is necessary to hook the rail fastening device such as Pandorol or tie plate fixed to the sleeper to the dog nail etc. fixed to the sleeper, it is not recommended for sleepers in branch sections where the rail fastening device or tie plate etc. are not fixed in advance. The problem was that it could not be used.

In particular, the sleeper lifter described in Patent Document 1 is used by traveling on rails with a predetermined gauge, so there is no problem in replacing sleepers between rails with a constant gauge in straight sections or curved sections, but if the rail In the branching sections, the new sleepers are not equipped with rail fastening devices, tie plates, etc. in advance, and the positions where the rails will pass are not determined, so there is a problem that the sleeper hoist cannot be used.

Therefore, the present invention has been made with attention to such problems, and when replacing old and new sleepers, even if the rail fastening device, tie plate, etc. are not fixed to the new sleepers, the new sleepers can be suspended in the air. To provide a sleeper replacement aid that can be easily pulled up to the bottom of a rail.

In order to solve the above problems, the sleeper replacement aid according to the present invention includes a sleeper replacement aid main body that is placed over the rail head and has a female threaded hole at a position above the rail head; a sleeper bottom hook provided on the outside of the sleeper replacement aid main body, the sleeper bottom hook having a sleeper bottom hook portion for hooking the sleeper bottom at its lower end; and a male screwed into the female screw hole of the sleeper replacement aid main body. A rail that is provided with a threaded portion, and that rotates with its lower end pushing the rail head to raise the sleeper exchange aid main body and the sleeper bottom hook, and pull up the sleeper hooked by the sleeper bottom hook. It is characterized by having a pulling body.
Further, in the sleeper replacement aid according to the present invention, a cylindrical portion provided with a vertically penetrating through hole is provided on the outside of the sleeper replacement aid main body, while the sleeper bottom hook body is The sleeper bottom hooking shaft part is passed through the through hole of the cylindrical part and is provided with the sleeper bottom hooking part for hooking the sleeper bottom face at the lower end, and can be detached from the sleeper bottom hooking shaft part on the upper part of the sleeper bottom hooking shaft part . It is also characterized by comprising a retaining part that is screwed together and has an outer diameter larger than the inner diameter of the through hole of the cylindrical part.
Furthermore, the sleeper replacement aid according to the present invention is characterized in that the cylindrical portions are provided at four corners of the sleeper replacement aid main body.
Further, in the sleeper replacement aid according to the present invention, a male threaded portion is provided on the outer peripheral surface of the upper part of the sleeper bottom hooking shaft portion , and the retaining portion is provided with the male screw portion of the sleeper bottom hooking portion. The nut has a female threaded part that is screwed into the threaded part, and is configured such that the height of the sleeper bottom hook part provided at the lower part of the sleeper bottom hook shaft part can be adjusted by rotating the nut. Features.
Further, in the sleeper replacement aid according to the present invention, a protruding guide rod that protrudes outward from the outer surface of the cylindrical part is provided above the sleeper bottom hook part in the sleeper bottom hook shaft part. On the other hand, the cylindrical part has a retracting hook part that guides the protruding guide rod in the horizontal direction after going upward from its lower end so that the sleeper bottom hook part faces outward and maintains a retracted state in which it does not interfere with the sleepers. It is also characterized by the provision of a state retaining groove.
The sleeper replacement aid according to the present invention is also characterized in that the protruding guide rod is provided at the sleeper bottom hooking shaft portion so as to protrude in a direction opposite to the sleeper bottom hooking portion.
Furthermore, the sleeper replacement aid according to the present invention is characterized in that the upper end of the rail pulling body is provided with an electric rotating tool socket fitting part into which a socket of an electric rotating tool is fitted.

The sleeper replacement aid according to the present invention includes a sleeper replacement aid main body that is placed over the rail head and has a female threaded hole above the rail head, and an outer side of the sleeper replacement aid main body. and a sleeper bottom surface hooking body provided with a sleeper bottom surface hooking part for hooking the bottom surface of the sleeper at the lower end, and a female threaded hole on the outer peripheral surface of the sleeper replacement aid body is screwed into the sleeper bottom surface hooking body. A male screw part is provided, and when rotated, the main body of the sleeper replacement aid and the sleeper bottom hook are raised, and a rail lifting body is screwed together to pull up the sleeper hooked on the sleeper bottom hook. .
Therefore, when replacing old and new sleepers, even if the rail fastening device, tie plate, etc. are not fixed to the new sleeper, the new sleeper can be replaced by rotating the rail pulling body using the sleeper replacement aid according to the present invention. You can easily pull it up to the bottom of the rail floating in the air.

FIG. 2 is a perspective view showing a state in which the sleeper replacement aid according to the embodiment of the present invention is used. FIG. 2 is a perspective view taken from a different angle from FIG. 1 illustrating a state in which the sleeper replacement aid according to the embodiment of the present invention is used. FIG. 2 is a front view of a sleeper replacement aid according to an embodiment of the present invention. FIG. 2 is a left side view of the sleeper replacement aid according to the embodiment of the present invention. FIG. 2 is a plan view of a sleeper replacement aid according to an embodiment of the present invention. FIG. 2 is a front view of a main body of a sleeper replacement aid that constitutes a sleeper replacement aid according to an embodiment of the present invention. It is a left side view of the main body of the sleeper replacement aid which constitutes the sleeper replacement aid of the embodiment according to the present invention. FIG. 2 is a plan view of a main body of a sleeper replacement aid that constitutes a sleeper replacement aid according to an embodiment of the present invention. (a) and (b) are a front view and a plan view, respectively, of a rail pulling body that constitutes a sleeper replacement aid according to an embodiment of the present invention. (a) to (c) are respectively a front view, a side view, and a plan view of a sleeper bottom hook part that constitutes a sleeper replacement aid according to an embodiment of the present invention. It is an explanatory view explaining how to use the sleeper replacement aid of the embodiment according to the present invention, and is an explanatory view showing a state in which the old synthetic sleeper has been removed. It is an explanatory diagram explaining how to use the sleeper replacement aid of the embodiment according to the present invention, and is an explanatory diagram showing the work of installing the sleeper replacement aid of the embodiment after inserting the new synthetic sleeper and tie plate. be. It is an explanatory view explaining how to use the sleeper replacement aid of the embodiment according to the present invention, and is an explanatory diagram showing the work of bringing the top surface of the sleeper closer to the bottom surface of the rail using the sleeper replacement aid and the electric rotary tool of the embodiment. It is. (a) to (c) are diagrams each showing an example of a setting position of a sleeper bottom surface hook in the cylindrical portion of the sleeper replacement aid according to the embodiment of the present invention. It is a figure which shows an example of the setting position of the sleeper bottom surface hook in the cylinder part of the sleeper replacement|exchange aid tool of embodiment based on this invention with respect to the new sleeper of a branch area.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a sleeper replacement aid 1 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Note 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 modified as appropriate within the scope of the technical idea of the present invention.

<Configuration of sleeper replacement aid 1 according to the embodiment of the present invention>
As shown in FIGS. 1 and 2, the sleeper replacement aid 1 according to the embodiment of the present invention is designed to attach the upper surface of the new sleeper M to the bottom surface of the rail R floating in the air during the replacement work of new and old sleepers. This is a jig for carrying out the work of bringing the sleeper closer to each other, and as shown in FIGS. 1 to 5, it is composed of a sleeper replacement aid main body 11, a rail lifting body 12, a sleeper bottom hooking body 13, and the like. In the sleeper replacement aid 1 of the embodiment, two sleeper bottom hooks 13 are used for each sleeper replacement aid 1.

(Sleeper replacement aid body 11)
The sleeper replacement aid main body 11 is made by repeatedly bending a steel bar or the like into a U-shape and an inverted U-shape and placing it over the head RH of the rail R, as shown in FIGS. 6 to 8. Grip portions 11a1, 11a1 to be grasped by hands, respectively, are provided at intervals of about 30 to 60 cm, and bolt support plate receiving portions 11a2, 11a2 is provided and is placed over the head RH of the rail R so as to straddle the head RH of the rail R. The main body frame 11a of the sleeper replacement aid is configured to be located above, and the bolt support plate receiving parts 11a2, 11a2 are welded to each other, and a rail is provided at a position above the rail head RH in the center. The nut 11b1 is provided with a female threaded hole 11b11 in the rail pulling body passage hole through which the pulling body 12 passes, and a bolt support plate 11b is provided by welding or the like.

As shown in FIG. 8 etc., sleeper bottom hook rods 13a as sleeper bottom hook shafts of the sleeper bottom hook body 13 are passed through the four corners of the sleeper replacement aid body frame 11a, respectively, as shown in FIG. 8 etc. A cylindrical portion 11d provided with a vertically extending through hole 11d1 is provided by welding or the like.

As shown in FIG. 6, etc., a protruding guide rod 13d of the sleeper bottom surface hook 13, which will be described later, is guided upward from the lower end of the cylindrical portion 11d, and then horizontally (laterally) to the cylindrical portion 11d. On the other hand, a hook part retracted state holding groove part 11d2 is provided in which the sleeper bottom hook part 13b faces outward and maintains a retracted state in which it does not interfere with the new sleeper M.

In addition, sleeper replacement aid main body frame 11a, sleeper replacement aid support bars 11e, 11f, etc. made of the same bar steel are welded horizontally to the sleeper replacement aid main body frame 11a, cylindrical mounting plate 11c, etc., as appropriate. It is reinforced.

(Rail pulling body 12)
As shown in FIGS. 9(a) and 9(b), the rail pulling body 12 has a male threaded hole 11b11 (see FIG. 8) of a nut 11b1 of the bolt support plate 11b of the sleeper replacement aid main body 11. Electric rotary tool socket fitting using a threaded rod 12a with a threaded portion 12a1 provided on the outer peripheral surface and a hexagonal nut fixed to the upper end of the screw rod 12a and into which the socket 21 of the electric rotary tool 2 is fitted. It is composed of a joining part 12b and a rail head pressing part 12c which is provided at the lower end of the threaded rod 12a and presses down the head RH of the rail R.

(Sleeper bottom hook 13)
The sleeper bottom hook 13 is used by being rotatably passed through the through holes 11d1 of the cylindrical portion 11d provided at the four corners of the sleeper replacement aid main body 11a, as shown in FIGS. 3 to 5. As shown in a) to (d), a sleeper bottom hooking rod 13a is provided with a male threaded portion 13a1 at the upper end, and a sleeper bottom hooking rod 13a is welded or otherwise provided to the lower end of the sleeper bottom hooking rod 13a to pull the bottom of the new sleeper M. A sleeper bottom hooking part 13b for hanging, a retaining part 13c screwed into the male screw part 13a1 at the upper end of the sleeper bottom hooking bar 13a, and a cylindrical part 11d above the sleeper bottom hooking part 13b of the sleeper bottom hooking bar 13a. It is provided so as to protrude outward from the outer surface, and is fitted and guided by the hook part retracted state holding groove 11d2 (see FIG. 6) of the cylindrical part 11d, so that the sleeper bottom hook 13 is in a retracted state in which it is not caught on the new sleeper M. It is composed of a protruding guide rod 13d that holds the.

On the upper surface of the sleeper bottom hook part 13b, a non-slip member with an uneven shape is provided as shown in FIG. 10(c) so that the new sleeper M can be reliably pulled up without slipping.

The retaining portion 13c is composed of two nuts having an outer diameter larger than the inner diameter of the through hole 11d1.

The protruding guide rod 13d is provided so as to protrude from the sleeper bottom hooking rod 13a in a direction opposite to the sleeper bottom hooking portion 13b.

<How to use the sleeper replacement aid 1 according to the embodiment of the present invention>
Next, a method of using the sleeper replacement aid 1 according to the embodiment of the present invention when exchanging old and new sleepers will be described.

When replacing old and new sleepers, first, as shown in Figure 11, in order to remove the old sleeper M' installed under the rail R, dig up the crushed stone G around the old sleeper M' and remove the old sleeper M'. remove. Note that when the old sleeper M' is removed, the area where the old sleeper M' was located will be greatly depressed, as shown in FIG.

Next, as shown in FIG. 12, a new sleeper M' is inserted into the place where the old sleeper M' was, and a tie plate T, for example, is installed at a position below the rail R.

Here, since the crushed stone G around the old sleeper M' was dug down in order to remove the old sleeper M', even if the new sleeper M is inserted and the tie plate T is installed as shown in Figure 12, the bottom surface of the rail R and the new A gap is left between the upper surface of the sleeper M or the upper surface of the tie plate T.

Therefore, as shown by the rail R on the left side of FIG. The presser portion 12c is brought into contact with the head RH of the rail R.

In addition, when lowering the sleeper replacement aid 1 of the embodiment to cover the head RH of the rail R, depending on the work place where the sleeper replacement is performed, the sleeper replacement aid 1 shown in FIGS. 14(a) to 14(c), FIG. As shown in FIG. 2, the optimum two cylindrical portions 11d are selected from among the four cylindrical portions 11d provided at the four corners of the sleeper replacement aid main body 11, and the sleepers are hooked onto the bottom of the sleeper. The body 13 is inserted and used.

Next, as shown by the rail R on the right side of FIG. 12, the sleeper bottom hook rod 13a passed through the cylindrical portion 11d of the sleeper replacement aid main body 11a is rotated, and the sleeper bottom hook at the lower end of the sleeper bottom hook rod 13a is rotated. 13b into the bottom of the new sleeper M.

In addition, among the four cylindrical portions 11d provided at the four corners of the sleeper replacement aid main body 11, normally two cylindrical portions 11d on the diagonal are selected as shown in FIGS. 14(a) and 14(b). When the sleeper bottom hooks 13 are inserted and used in each of the two diagonally cylindrical portions 11d, the new sleeper M can be lifted in a well-balanced manner even with the two sleeper bottom hooks 13.

However, the new sleeper M is a light sleeper made of wood or synthetic resin (plastic) used in a branch section, and is not equipped with tie plates T, fastening bolts 41, fastening nuts 42, etc. In addition, when lifting a new sleeper M that has a guardrail GR (see Fig. 15, etc.) on one side, as shown in Fig. 14(c) etc., the guardrail is The sleeper bottom hook rod 13a is used by passing it through the two cylindrical parts 11d on the opposite side of the guardrail GR so as to avoid the GR.

In addition, when inserting the sleeper bottom hook part 13b at the lower end of the sleeper bottom hook rod 13a into the bottom of the new sleeper M by rotating the sleeper bottom hook rod 13a passed through the cylindrical portion 11d of the sleeper replacement aid main body 11a, The worker can insert the sleeper bottom hook 13b into the bottom of the new sleeper M by pinching the protruding guide rod 13d above the sleeper bottom hook 13b and pointing it outward.

When the sleeper bottom hook part 13b at the lower end of the sleeper bottom hook bar 13a has been inserted into the bottom of the new sleeper M as shown by the rail R on the right side of FIG. 12, next, as shown by the rail R on the left side of FIG. , the socket 21 of the electric rotating tool 2 is fitted into the electric rotating tool socket fitting part 12b at the upper end of the threaded rod 12a of the rail pulling body 12, and the screw rod 12a of the rail lifting body 12 is rotated by the electric rotating tool 2. .

Then, the rail head holding part 12c provided at the lower end of the threaded rod 12a of the rail pulling body 12 is in contact with the upper surface of the head RH of the rail R, and since the rail R itself basically does not move up and down, it is not electrically rotated. When the threaded rod 12a of the rail pulling body 12 is rotated by the tool 2, the sleeper replacement aid body 11 rises, and the sleeper bottom hook rods 13a inserted into the cylindrical portions 11d provided at the four corners of the sleeper replacement aid body 11 are lifted. is also pulled up, and the sleeper bottom hook part 13b provided at the lower end of the sleeper bottom hook bar 13a also rises, causing the new sleeper M to rise.

Then, as shown by the rail R on the right side of FIG. 13, the new sleeper M is pulled up by the electric rotating tool 2, and the rail is pulled up by the electric rotating tool 2 until the tie plate T on the top surface of the new sleeper M is in close contact with the bottom surface of the new rail R. The threaded rod 12a of the body 12 is rotated and tightened, and then the tie plate T and the new sleeper M are fixed with dog nails (screw nails) 3, and the tie plate T and the new rail R are connected by fastening bolts 41 and fastening nuts 42. Fix it with etc.

When the rail R has been fastened to the new sleeper M at this point, the worker grasps the protruding guide rod 13d and rotates inward in order to remove the sleeper replacement aid 1.

Then, the sleeper bottom surface hook portion 13b at the lower end of the protruding guide rod 13d comes off from the bottom surface of the new sleeper M, and the protruding guide rod 13d is moved along the hook portion retracted state holding groove portion 11d2 of the cylindrical portion 11d, and the hook portion retracted state holding groove portion 11d2 is moved. By locating the sleeper bottom surface hook part 13b in the horizontal part of the sleeper, it is possible to move it to a retracted position where it will not be caught by the new sleeper M, and it is also possible to hold it at the retracted position.

<Set positions of the sleeper bottom hooks 13 in the cylindrical portion 11d at the four corners of the sleeper replacement aid 1>
In the sleeper replacement aid 1 according to the embodiment of the present invention, since the cylindrical portions 11d are provided at the four corners of the sleeper replacement aid body 11, for example, as shown in FIGS. Among the cylindrical portions 11d, the two most suitable cylindrical portions 11d are selected according to the work site, and the sleeper bottom hook 13 is inserted into each of the two selected cylindrical portions 11d for use. That is, as shown in FIGS. 14(a) and 14(b), the sleeper bottom hooks 13 may be set and used in each of the two diagonally located cylindrical portions 11d, or as shown in FIG. 14(c). The sleeper bottom hook 13 may be set and used in each of the two cylindrical portions 11d on one side. When setting or removing the sleeper bottom hook 13 on the cylindrical portion 11d, remove the retaining portion 13c screwed into the male screw portion 13a1 at the upper end of the sleeper bottom hook 13a.

For example, in a branch section as shown in Fig. 15, when installing a new sleeper M at a place where a guardrail GR is not provided, the diagonal line in the sleeper replacement aid 1 as shown in Figs. The new sleeper M is pulled up by inserting the sleeper bottom hooks 13 into the two cylindrical parts 11d that are lined up in the direction.

On the other hand, when installing a new sleeper M at a location where the guardrail GR is installed, as shown in FIG. The new sleeper M is pulled up by inserting the sleeper bottom hooks 13 into the two cylindrical portions 11d that are lined up.

<Summary of sleeper replacement aid 1 according to the embodiment of the present invention>
As explained above, the sleeper replacement aid 1 of the embodiment according to the present invention is placed over the head of the rail R so as to straddle the head of the rail R, and has a female screw threaded at a position above the rail head RH. A sleeper replacement aid main body 11 provided with a hole 11b11, and a sleeper bottom hook 13 provided on the outside of the sleeper replacement aid main body 11 and provided with a sleeper bottom hook portion 13b for hooking the sleeper bottom at its lower end. In addition, the female threaded hole 11b11 of the sleeper replacement aid main body 11 is provided with a male threaded part 12a1 on the outer circumferential surface that is screwed into the female threaded part 11b11, and the rail R is held by the rail head holding part 12c at the lower end. A rail lifting body 12 is provided which raises the sleeper replacement aid main body 11 and the sleeper bottom hook 13 by rotating with the head pressed, and pulls up the new sleeper M hooked on the sleeper bottom hook 13b. .

Therefore, when replacing the old and new sleepers M, M', even if the rail fastening device, tie plate T, etc. are not fixed to the new sleeper M, the sleeper replacement aid 1 of the embodiment can be used to rotate the rail pulling body 12. By doing so, the new sleeper M can be easily pulled up to the bottom surface of the rail R floating in the air and brought into close contact with it, thereby improving the work efficiency of exchanging the old and new sleepers M, M'.

In addition, the sleeper replacement aid 1 of the embodiment according to the present invention can be set from above the head RH of the rail R, so there is no need to insert a jack or dig up crushed stone as in the past, and the electric rotation Since tool 2 allows quick raising and lowering, adjustments can be made quickly and work efficiency is greatly improved.

Furthermore, since the sleeper replacement aid 1 according to the embodiment of the present invention is set for each rail R, it is also possible to set it for each rail R on one side, and in this respect, the work of replacing old and new sleepers M, M' is also simplified. can improve work efficiency.

Furthermore, in the sleeper replacement aid 1 according to the embodiment of the present invention, the sleeper bottom hook 13 is provided with a cylindrical portion 11d provided with through holes 11d1 penetrating in the vertical direction at the four corners of the sleeper replacement aid main body 11. , the sleeper bottom hooking body 11 is rotatably passed through a through hole 11d1 of the cylindrical portion 11d, and includes a sleeper bottom hooking rod 13a having a sleeper bottom hooking portion 13b on the lower end for hooking the bottom of the new sleeper M, and a sleeper bottom hooking rod 13a. It is provided with a retaining part 13c which is removably screwed into the male screw part 13a1 on the upper part of the bottom hooking rod 13a and has an outer diameter larger than the inner diameter of the through hole 11d1 of the cylindrical part 11d.

Therefore, in the sleeper replacement aid 1 of the embodiment according to the present invention, the sleeper bottom hook 13 can be attached to the sleeper replacement aid main body 11 by removing the retaining part 13c from the male threaded part 13a1 on the upper part of the sleeper bottom hook 13a. Since it can be detachably attached to the cylindrical part 11d of the sleeper M, it is possible to attach the sleeper bottom hook 13 to the cylindrical part 11d depending on the work site and perform rail replacement work. , M' can be improved in efficiency.

Further, in the sleeper replacement aid 1 according to the embodiment of the present invention, the sleeper replacement aid main body 11 is provided with cylindrical portions 11d at the four corners through which the sleeper bottom hook rods 13a are passed.

Therefore, as shown in FIGS. 14A to 14C and FIG. By inserting and using the sleeper bottom hook 13 in each of the cylindrical portions 11d, it is possible to pass the sleeper bottom hook 13 through the cylindrical portion 11d that is optimal for the work site, such as avoiding the guide rail GR in the branch section. Therefore, in this respect as well, the work efficiency of replacing the old and new sleepers M, M' can be improved.

Further, in the sleeper replacement aid 1 according to the embodiment of the present invention, the male screw part 13a1 is provided at the upper part of the sleeper bottom hooking bar 13a, while the retaining part 13c is provided on the male thread of the sleeper bottom hooking bar 13a. These are two nuts each having a female threaded portion that is screwed into the threaded portion.

Therefore, the sleeper replacement aid 1 according to the embodiment of the present invention can prevent the sleeper bottom hooking rod 13a from coming off from the cylindrical portion 11d by the retaining portion 13c, and also prevents the sleeper bottom hooking rod 13a from coming off from the bottom surface of the new sleeper M and the sleeper bottom hooking portion. Since the distance from the top surface of sleepers 13b can be adjusted, the efficiency of replacing the old and new sleepers M, M' can be improved in this respect as well.

Furthermore, in the sleeper replacement aid 1 according to the embodiment of the present invention, a protruding guide rod 13d that protrudes outward from the outer surface of the cylindrical portion 11d is provided above the sleeper bottom hook portion 13b of the sleeper bottom hook rod 13a. On the other hand, in the cylindrical part 11d, after going upward from the lower end, the protruding guide rod 13d is guided laterally so that the sleeper bottom hook part 13b faces outward with respect to the cylindrical part 11d, and the new sleeper M is attached. A hook retracted state retaining groove portion 11d2 is provided to maintain the retracted state without interference.

Therefore, in the sleeper replacement aid 1 of the embodiment according to the present invention, when the sleeper replacement aid 1 of the embodiment is pulled up from the rail R after the sleeper replacement work is completed, the sleeper bottom hook rod 13a is attached to the hook retracted state holding groove 11d2. By guiding the protruding guide rod 13d and setting it in the horizontal part of the hook part retracted state holding groove part 11d2, it is possible to prevent the sleeper bottom hook part 13b from getting caught on the new sleeper M and getting in the way. In this respect, the work efficiency of replacing the old and new sleepers M, M' can be improved.

Further, in the sleeper replacement aid 1 according to the embodiment of the present invention, the protruding guide rod 13d of the sleeper bottom hooking rod 13a is provided to protrude in the opposite direction to the sleeper bottom hooking part 13b on the sleeper bottom hooking rod 13a.

Therefore, in the sleeper replacement aid 1 of the embodiment according to the present invention, the sleeper bottom hook part 13b can be inserted into the bottom surface of the new sleeper M by rotating the protruding guide rod 13d outward during the sleeper replacement work. Therefore, in this respect as well, the work efficiency of replacing the old and new sleepers M, M' can be improved.

Furthermore, in the sleeper replacement aid 1 according to the embodiment of the present invention, the upper end of the rail pulling body 12 is provided with an electric rotating tool socket fitting part 12b into which the socket 21 of the electric rotating tool 2 is fitted.

Therefore, according to the sleeper replacement aid 1 of the embodiment according to the present invention, the electric rotating tool 2 is used to rotate the threaded rod 12a of the rail pulling body 12 to bring the bottom surface of the rail R and the top surface of the new sleeper M into close contact. Therefore, it is possible to improve the work efficiency of exchanging the new and old sleepers M and M'.

In addition, in the description of the above embodiment, two optimal cylindrical portions 11d of the four corner cylindrical portions 11d of the sleeper replacement aid main body 11 are selected according to the work site, and each of the two selected cylindrical portions 11d is Although it has been explained that the new sleeper M is pulled up by inserting the sleeper bottom hook 13 into the cylindrical part 11d, the present invention is not limited to this. Of course, it may be pulled up, or a plurality of cylindrical portions 11d may be provided only on either the left or right side of the sleeper exchange aid main body 11, and the sleeper bottom hook 13 may be passed through.

1 Sleeper replacement aid 11 Sleeper replacement aid main body 11a Sleeper replacement aid main body frame 11a1 Gripping portion 11a2 Bolt support plate receiving portion 11b Bolt support plate 11b1 Nut 11b11 Female screw hole 11c Cylinder part mounting plate 11d Cylinder part 11d1 Through hole 11d2 Hook Retracted state holding groove 11e, 11f Sleeper replacement aid auxiliary bar 12 Rail lifting body 12a Threaded rod 12a1 Male screw part 12b Electric rotary tool socket fitting part 12c Rail head holding part 13 Sleeper bottom hook 13a Sleeper bottom hook rod ( Sleeper bottom hook shaft part)
13a1 Male screw part 13b Sleeper bottom hook part 13c Retaining part 13d Projecting guide rod 2 Electric rotary tool 21 Socket 3 Dog nail (screw nail)
41 Fastening bolt 42 Fastening nut R Rail RH Head M New sleeper M' Old sleeper T Tie plate

Claims (7)

A sleeper replacement aid body that is placed over the rail head and has a female screw hole located above the rail head;
a sleeper bottom hooking body provided on the outside of the sleeper replacement aid main body and having a sleeper bottom hooking part for hooking the sleeper bottom at its lower end;
A male threaded portion is provided to be screwed into the female screw hole of the sleeper replacement aid main body, and the lower end rotates while pushing the rail head to raise the sleeper replacement aid main body and the sleeper bottom hook. and a rail pulling body for pulling up the sleeper hooked by the sleeper bottom hook part. The sleeper replacement aid according to claim 1,
On the outside of the sleeper replacement aid main body, a cylindrical part is provided with a through hole penetrating in the vertical direction,
The sleeper bottom hook is
a sleeper bottom hooking shaft part that is passed through a through hole of the cylindrical part and has a sleeper bottom hooking part provided at a lower end for hooking the sleeper bottom surface;
A sleeper replacement aid comprising: a retaining part that is removably screwed into the male screw part on the upper part of the sleeper bottom hooking shaft part and has an outer diameter larger than the inner diameter of the through hole of the cylindrical part. The sleeper replacement aid according to claim 2,
The sleeper replacement aid is characterized in that the cylindrical portions are provided at four corners of the sleeper replacement aid main body. The sleeper replacement aid according to claim 2 or 3,
A male threaded portion is provided on the upper outer peripheral surface of the sleeper bottom hooking shaft portion ,
The retaining part is a nut having a female threaded part that is screwed into the male threaded part of the sleeper bottom hook part,
A sleeper replacement aid, characterized in that the height of the sleeper bottom hook part provided at the lower part of the sleeper bottom hook shaft part can be adjusted by rotating the nut. In the sleeper replacement aid according to any one of claims 2 to 4,
A protruding guide rod that protrudes outward from the outer surface of the cylindrical part is provided above the sleeper bottom hook part in the sleeper bottom hook shaft part,
The cylindrical part has a catch part that maintains a retracted state in which the bottom hook part of the sleeper faces outward and does not interfere with the sleeper by guiding the protruding guide rod in the horizontal direction after going upward from the lower end of the cylinder part. A sleeper replacement aid characterized by being provided with a groove. The sleeper replacement aid according to claim 5,
The sleeper replacement aid is characterized in that the protruding guide rod is provided at the sleeper bottom hook shaft portion so as to protrude in a direction opposite to the sleeper bottom hook portion. In the sleeper replacement aid according to any one of claims 1 to 6,
The sleeper replacement aid is characterized in that the upper end of the rail pulling body is provided with an electric rotating tool socket fitting part into which a socket of an electric rotating tool is fitted.

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