JPH08113901A - Layout structure of metal-made sleeper - Google Patents

Abstract

PURPOSE: To make it passable to excavate ballast to a shallow depth when replacing sleepers and enhance the stability against relative positional deviations between adjacent sleepers produced by horizontal pressure or their decided state. CONSTITUTION: When replacing sleepers, ballast is removed (or excavated) to such a shallow depth that end walls 4 may pass below a rail and metal-made sleepers 1 are passed below the rail. A horizontal pressure resistant body 10 is connected between a pair of end walls 4, thereby integrating the metal-made sleepers with the horizontal pressure resistant body 10 as a unit. The ballast is backfilled and hardened. The metal-made sleepers 1, whose rail accuracy in the radial direction is in a maintenance free state, can be easily secured by the horizontal pressure resistant body 10. This construction makes it possible to prevent the generation of relative positional deviations of the sleepers in the longitudinal direction by enhanced unit sleepers and decide proper pitches between the adjacent metal-made sleepers with ease and enhance their stability as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement structure of metal sleepers used for laying rails in railways.

[0002]

2. Description of the Related Art Conventionally, as a metal sleeper, for example, a structure disclosed in Japanese Patent Laid-Open No. 5-255901 has been provided. In this conventional structure, the metal sleeper is formed in a box shape having an open bottom by the side wall portions, both end wall portions, and the upper surface wall portion. Both end wall portions have a plate-like protrusion that protrudes longer in the thickness direction of the sleeper than the opening edge.

When replacing the metal sleeper having the conventional structure with the sleeper used for the existing rail, first, the ballast around the periphery and the existing sleeper after the fastening is released are removed. Then, the metal sleepers were passed under the existing rails, the ballast was backfilled, and the metal sleepers were raised and brought into contact with the rails from below, and then fastened. After that, the ballast was compacted using an automatic compaction machine.

In the metal sleeper thus arranged, since the plate-shaped protrusion serves as a lateral pressure resistance portion, the accuracy in the width direction of the line can be easily ensured in a maintenance-free state, Therefore, the worker can replace the sleepers even if he / she is not a highly skilled track maintenance worker.

[0005]

In the above-mentioned conventional structure, the metal sleepers which pass under the existing rails become considerably thick in the thickness direction due to the presence of the protrusions, and therefore the dug down for removing the ballast. Must be carried out to a considerable depth, and replacement work (construction) is a large-scale operation and cannot be performed quickly. In addition, since each metal sleeper has its own protrusion, there is a tendency for relative misalignment in the longitudinal direction between adjacent metal sleepers, and its correction (positioning) work cannot be performed easily. Further, there is a problem in stability such that the pitch between adjacent metal sleepers cannot be easily determined.

The object of the present invention is to make it possible to make the ballast digging shallower at the time of replacement, and further to make the ballast stable with respect to the relative displacement between adjacent parts due to lateral pressure and the determination of the adjacent pitch. The point is to provide an arrangement structure of the obtained metal sleepers.

[0007]

In order to achieve the above object, a metal sleeper disposition structure of the present invention has a pair of side wall portions, a top wall portion, and end wall portions integrated at both longitudinal ends. With, and by forming a connecting insertion portion in these end wall portions, to configure a long box-shaped metal sleepers with an open bottom, from the outside between the end wall portions of adjacent metal sleepers Provided are lateral pressure resistors that can come into contact with each other, and these lateral pressure resistors are provided with a connecting insertion portion that can communicate with the connecting insertion portion, and a coupling tool that can be inserted between both communicating insertion portions. ing.

[0008]

According to the above-described structure of the present invention, when replacing the sleeper, the existing sleeper and the peripheral ballast are first removed. Here, the removal (digging) of the ballast is performed so shallow that the end wall portion can pass below the rail. The removal traces are then used to thread the metal sleepers under the rails and position them under both rails. Then, after the lateral piezoresistors are brought into contact with the end wall portions of the pair of metal sleepers adjacent to each other from the outside, the connecting tool is inserted between both the penetrating portions for connecting, and the end portions are operated. A lateral piezoresistor may be connected between the walls. As a result, the metal sleeper and the lateral piezoresistor can be rigidized into a unit body.

In this state, the ballast is backfilled in the removal mark, the unit body is moved up to bring both metal sleepers into contact with the lower portions of both rails, and then both rails are fastened to the metal sleepers. After that, the ballast is compacted by an automatic compaction machine or the like to complete the replacement of the metal sleepers.

The metal sleepers that have been replaced in this way can be easily maintained in the width-wise accuracy of the line in a maintenance-free state by the portion of the lateral piezoresistor, particularly the portion that exists between the two metal sleepers. Therefore, the worker can perform the replacement work even if he / she is not a highly skilled track maintenance worker. Then, the adjacent metal sleepers are integrated by the lateral piezoresistors to form a unit body, so that a relative positional shift in the longitudinal direction does not occur, and the correction (positioning) work thereof becomes unnecessary. Further, the pitch between the adjacent metal sleepers can be easily determined, so that the stability is improved as a whole.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4, for example, a metal sleeper 1 cast from a material such as ductile cast iron.
Is formed into a long box shape having an open bottom by a pair of side wall portions 2, an upper surface wall portion 3, and end wall portions 4 integrated at both ends in the longitudinal direction. Here, the both end wall portions 4 are rectangular plate shapes that are slightly larger than the cross section of the main body portion composed of the side surface wall portion 2 and the upper surface wall portion 3, and the lower surface thereof is aligned with the opening edge portion 5, and a part thereof is on both sides. It is formed by projecting outward from the surface wall portion 2 and the upper surface wall portion 3. And both side wall portions 2 of the end wall portion 4
Or at the four corners where it protrudes outward from the top wall 3
A recessed connecting insertion portion 6 that is open upward or downward is formed.

Both end portions of the metal sleeper 1 are formed in a wide rail laying portion 1A, and the rail laying portion 1A is used to fasten the laid (mounted) rail 15 to the upper surface wall portion 3 (positioning). The shoulder portion 7 and the hole portion 8 are formed in a state of protruding upward.

A pair of lateral piezoresistors 10 is provided between the end wall portions 4 of the adjacent (two) metal sleepers 1 so as to be abuttable from the outside. These lateral piezoresistors 10 are angle-shaped, and one side 10A is horizontal and the other side 10V is vertical.
The height H of B is aligned with the height of the end wall portion 4, and the length L is
Is set so that when the end faces of the other side 10B are aligned with the end faces of the pair of end wall portions 4, the metal sleepers 1 have a predetermined pitch.

Further, at both ends of the other side 11B of the lateral piezoresistor 10, there are formed through-hole-shaped connecting insertion portions 11 that can communicate with the connecting insertion portions 6 of the end wall portion 4. There is. Then, a bolt 12 and a nut 13, which are an example of a connector that can be freely inserted, are provided between the two insertion portions 6 and 11 that are in communication with each other. The fastening of the rail 15 described above is performed by a pan roll clip 16 inserted into the hole 8. 18 indicates a ballast.

The operation of the above embodiment will be described below. When replacing the sleepers on the existing rails 15, first, with the existing rails 15 and the existing sleepers being unfastened, as shown by the solid line in FIG. And are removed. Here, the removal (digging) of the ballast 18 is performed shallowly so that the end wall portion 4 and the shoulder portion 7 can pass below the rail 15.
Next, using the removal trace A, rail the metal sleeper 1
Pass it under the rails 15 and, as shown in the phantom line in FIG.
Located below.

Then, as shown in FIG. 6, a lateral piezoresistor is attached to the end wall portion 4 of the pair of metal sleepers 1 adjacent to each other.
After abutting the other side 11B of the outer side 10 from the outside, the bolt 12 is inserted between the connecting penetrating portions 6 and 11 which are in communication with each other, and the nut 13 is screwed and tightened, whereby the end wall 4 is formed. The lateral piezoresistor 10 can be connected. As a result, the pair of metal sleepers 1 and the pair of lateral piezoresistors 10 are rigidized into a rectangular frame shape, and thus the unit body 20 is formed.

In this state, the ballast 18 is backfilled in the removal trace A, the unit body 20 is lifted, and the both metal sleepers 1 are brought into contact with the lower portions of both rails 15. Then, insert the pandroll clip 16 into the hole 8 to attach the rails 15
Is fastened to the metal sleeper 1. Thereafter, the ballast 18 is compacted by an automatic compactor or the like, so that the metal sleeper 1 can be replaced as shown in FIG.

The metal sleeper 1 thus exchanged is in a maintenance-free state in which the accuracy in the width direction of the line is maintained due to the portion of the lateral piezoresistor 10, particularly the portion existing between the two metal sleepers 1. Therefore, the worker can perform the replacement work even if he / she is not a highly skilled track maintenance worker. The lateral pressure resistor 10 is located between the adjacent metal sleepers 1.
By being integrated with each other to form the unit body 20, relative positional deviation in the longitudinal direction does not occur, and the correction (positioning) operation thereof becomes unnecessary. Further, the pitch between the adjacent metal sleepers 1 can be easily determined, so that the stability as a whole can be improved.

As shown in the above embodiment, when the lateral piezoresistor 10 is formed in an angle shape, the horizontal one side 10A is used as a bearing surface for further stabilization, whereby the metal sleeper 1 is made smaller. Although it can be made smaller, the lateral piezoresistor 10 in the form of a long plate or a channel may be used in the present invention.

As shown in the above embodiment, when the connecting insertion portion 6 of the end wall portion 4 is formed as a recessed portion which is opened upward or downward, the bolt 12 is moved downward or upward to be inserted. As a result, the connecting tool inserts the bolt 12 into the connecting insertion portion 11
With the nut 13 loosely screwed into the lateral pressure resistor
A predetermined number can be set to 10. However, in the present invention, the connecting insertion portion 6 of the end wall portion 4 may be formed by a through hole.

In the above embodiment, the connecting tool is composed of the bolt 12 and the nut 13, but this may be another connecting means such as a rivet. FIG. 7 shows another embodiment of the present invention. That is, the lateral piezoresistor 10 is elongated, and a group of connecting insertion portions 11 are formed at two locations in the intermediate portion near both ends. According to this alternative embodiment, the horizontal side 10A, that is, the area of the bearing surface, can be enlarged for further stabilization, and thus the metal sleeper 1 can be made smaller. Further, the gap 21 between the lateral piezoresistors 10 between the unit bodies 20 can be made smaller, and the pitch between the metal sleepers 1 adjacent to each other between the unit bodies 20 can be easily adjusted accordingly.

FIG. 8 shows still another embodiment of the present invention.
That is, a pair (two) of lateral piezoresistors 10 are connected to one end wall portion 4, and by repeating this, the whole unit body 22 is formed. According to this still another embodiment, the bearing surface by one side 10A can be made continuous to increase the area, and further stabilization can be achieved, and the metal sleeper 1 can be further reduced. Further, by making the whole unit body 22 continuous, the pitch of one group of metal sleepers can be determined.

[0023]

According to the present invention having the above-described structure, the ballast can be removed (drilled) when exchanging sleepers so that it is shallow enough to allow the end wall to pass under the rails.
Then, by connecting the lateral piezoresistors across the end wall portions of the pair of metal sleepers adjacent to each other, the metal sleepers and the lateral piezoresistors can be rigidified and formed into a unit body, and thus the whole body can be formed. As a result, the amount of excavation can be reduced, and replacement work can be performed quickly.

Further, the metal sleepers that have been replaced can easily secure the accuracy in the width direction of the line in a maintenance-free state due to the portion of the lateral piezoresistor, especially between the two sleepers made of metal, Therefore, the worker can perform the replacement work even if he / she is not a highly skilled track maintenance technician. And by integrating the adjacent metal sleepers with lateral piezoresistors and making them into a unit body, relative positional deviation in the longitudinal direction does not occur, and the correction (positioning) work can be made unnecessary, and The pitch between adjacent metal sleepers can be easily determined, and the stability can be improved as a whole.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of a metal sleeper arrangement structure according to an embodiment of the present invention.

FIG. 2 is a front view of the arrangement structure of the metal sleepers.

FIG. 3 is a side view of the arrangement structure of the metal sleepers.

FIG. 4 is a plan view of a main part of the arrangement structure of the metal sleeper.

FIG. 5 is a front view showing a state where the metal sleepers are replaced in the arrangement structure and the existing sleepers are removed.

FIG. 6 is a front view when the metal sleepers are inserted, showing the time of replacement in the arrangement structure of the metal sleepers.

FIG. 7 shows another embodiment of the present invention and is a plan view of a main part in the arrangement structure of the metal sleepers.

FIG. 8 is a plan view of a main part of a metal sleeper arrangement structure according to still another embodiment of the present invention.

[Explanation of symbols]

 1 Metal sleeper 2 Side wall 3 Top wall 4 End wall 6 Connection insertion part 7 Shoulder part 10 Lateral pressure resistor 10A One side 10B Other side 11 Connection insertion part 12 Bolt (connector) 13 Nut (connection) Tool) 15 rails 16 Pandroll clip 18 Ballast 20 Unit body 22 Continuous unit body A Removal mark

Claims (1)

[Claims] 1. A pair of side wall portions, an upper surface wall portion, and end wall portions that are integrated at both ends in the longitudinal direction, and a connecting insertion portion is formed in these end wall portions, and the bottom portion is open. A long box-shaped metal sleeper is formed, and lateral pressure resistors that can come into contact with the outside from the outside are provided between the end wall portions of the adjacent metal sleepers. An arrangement structure of a metal sleeper, characterized in that a connecting insertion portion that is freely communicated is formed in the portion, and a coupling tool that is freely inserted is provided between both the communicating insertion portions.