JP7798642B2 - Anti-derailment guard device for slab track and anti-derailment guard system for slab track - Google Patents

Description

This application relates to a derailment prevention guard device and derailment prevention guard system that prevent railway vehicle wheels from derailing from the main track rail on a slab track.

Conventionally, guard devices to prevent wheel derailment are sometimes installed along the main rails ("main rails" in this specification and claims refers to the rails on which railway trains run) on which railway vehicles (hereinafter simply referred to as "vehicles") run. Such guard devices are sometimes installed along the main rails of slab track.

For example, one prior art example of this type is a wheel guard device that provides guard material along the main rail of a track that uses a frame slab (see, for example, Patent Document 1). In this wheel guard device, a fixing member is fixed to the frame slab, and a guard retaining member with a guard material attached is fixed to the top of the fixing member.

JP 2014-211010 A

However, when installing wheel guard devices on slab track, there are cases where it is not possible to secure the wheel guard device's fixing members in a way that avoids the reinforcement of the slab track, and the wheel guard device cannot be installed properly along the main rail.

Furthermore, in the case of slab track where the position of reinforcement is unclear, the wheel guard device described above cannot be installed appropriately along the main rail.

The present application therefore aims to provide a derailment prevention guard device for slab track and a derailment prevention guard system for slab track that can properly install guard materials along the main rail without processing the slab track.

To achieve the above objective, the derailment prevention guard device for slab track according to the present application comprises a guard material arranged along the main track rail, a guard retaining member that holds the guard material, an attachment member that attaches the guard material to the guard retaining member, and a gap closing member that is attached between the underside of the guard retaining member and the upper surface of the slab track to close the gap between the underside of the guard retaining member and the upper surface of the slab track, and the guard retaining member has an integrally formed fixing portion that is fixed to the main track rail.

With this configuration, on slab track, the fixed portion of the guard retaining member is fixed to the main rail, and the guard material is fixed to this guard retaining member with an attachment member. A gap closure member is then attached to the gap between the underside of the guard retaining member and the slab track, and is brought into close contact with the underside of the guard retaining member and the upper surface of the slab track. This allows the gap between the underside of the guard retaining member and the upper surface of the slab track to be filled with the gap closure member, allowing the derailment prevention guard device for slab track to be installed. This means that the derailment prevention guard device can be installed without any processing of the slab track.

The gap closure member may be a variable pad, and the guard retaining member may have an uneven portion on its underside with which the variable pad comes into contact. In this specification and claims, "variable pad" refers to a pad that is variable in the thickness direction and can maintain its shape after deformation. With this configuration, the variable pad can be attached to the gap between the underside of the guard retaining member and the upper surface of the slab track, and the gap can be filled by expanding the variable pad. The variable pad engages with the uneven portion on the underside of the guard retaining member, preventing horizontal displacement.

The uneven portion may also have an outer peripheral convex portion, a central convex portion, and a concave portion between the outer peripheral convex portion and the central convex portion, and the variable pad may have a core material in the area where it contacts the underside of the guard retaining member. With this configuration, when the variable pad is expanded and deformed, it is deformed so that it fits into the concave portion between the outer peripheral convex portion and the central convex portion, and after deformation, the variable pad can appropriately maintain a state in which the core material fills the gap between the underside of the guard retaining member and the upper surface of the slab track.

The gap closure member may be a wedge member having a sloped portion inserted between the underside of the guard retaining member and the slab track, and the underside of the guard retaining member at a position below the guard material may have the same slope as the sloped portion of the wedge member in a direction intersecting the direction in which the guard material extends, and may also be equipped with a locking mechanism to prevent the wedge member from falling off. With this configuration, the wedge member can be inserted into the gap between the underside of the guard retaining member and the upper surface of the slab track, and the wedge member can properly fill the gap. The wedge member is locked to the guard retaining member by the locking mechanism, preventing it from falling off.

The device may also include a fixing bolt that fixes the mounting member to the guard retaining member, and a rotation-preventing member that keeps the fixing bolt fixed and prevents it from rotating. With this configuration, the rotation-preventing member can prevent the fixing bolt of the mounting member that fixes the guard material to the guard retaining member from loosening due to vibrations from vehicles traveling on the main rail, etc.

The guard material may also have an outer abutment portion that prevents the wheels from derailing inwardly of the main rail, an inner abutment portion that prevents the derailed train from departing outwardly from the track, and a web portion that is fixed to the guard retaining member. With this configuration, the guard material can prevent derailment by causing a wheel attempting to derail to abut against the outer abutment portion, and even if a wheel derails, the inner abutment portion can stop the train, preventing it from departing significantly outwardly from the track.

Furthermore, the web portion of the guard material and the holding portion of the guard holding member that holds the guard material may have an engagement portion that engages with the guard material in the longitudinal direction. With this configuration, the holding portion and web portion of the guard holding member are engaged at the engagement portion, so the guard material can be properly held in the guard holding member.

On the other hand, the slab track derailment prevention guard system according to the present application comprises a plurality of slab track derailment prevention guard devices arranged in the direction of extension of the main track rail, and further comprises a guard material fall prevention device located inward of the slab track derailment prevention guard device located at the end of the slab track, the fall prevention device comprising a fixed base that is fixed to the main track rail, and a guard material support block having an uneven portion that engages with an uneven portion formed in the web portion of the guard material. In this specification and claims, "inward position" refers to a position from the end of the slab track toward the center of the slab track.

With this configuration, in addition to the multiple slab track derailment prevention guard devices provided in the direction of the main track rail, a fall prevention device is provided inward of the slab track derailment prevention guard device provided at the end of the slab track. Therefore, even if a guard material attempts to detach from the slab track derailment prevention guard device, the guard material will remain engaged with the guard material support block of the fall prevention device. This prevents the guard material provided along the main track rail from shifting out of position.

The guard material support block and the fixed base may be configured to be detachable, and the guard material support block may have an insertion portion through which the web portion of the guard material is inserted in the track direction, and the insertion portion may be provided with the uneven portion. With this configuration, the guard material web portion can be inserted into the insertion portion of the guard material support block, and the guard material support block can be fixed to the fixed base, allowing the anti-fall-off device to be installed efficiently.

This application makes it possible to provide a derailment prevention guard device for slab track that allows guard material to be properly installed along the main rail without processing the slab track.

FIG. 1 is a front view showing a first derailment prevention guard device for a slab track according to a first embodiment of the present application. FIG. 2 is a plan view of the first slab track derailment prevention guard device shown in FIG. 1. FIG. 3 is a perspective view showing the first derailment prevention guard device for slab track shown in FIG. 1 from below. 4A and 4B are diagrams showing the variable pad of the first derailment prevention guard device for slab track shown in FIG. 1, where FIG. 4A is a plan view and FIG. 4B is a side view. 5 is a perspective view showing a mounting member of the first derailment prevention guard device for a slab track shown in FIG. 1. FIG. 6A and 6B are diagrams showing the rotation stopper member of the first derailment prevention guard device for a slab track shown in FIG. 1, where (a) is a front view and (b) is a side view. FIG. 7 is a front view showing a fall-off prevention device according to an embodiment of the present application. FIG. 8 is a plan view of the fall-off prevention device shown in FIG. FIG. 9 is a front view showing a second derailment prevention guard device for a slab track according to a second embodiment of the present application. FIG. 10 is a front view showing the state in which the second slab track derailment prevention guard device shown in FIG. 9 is fixed by a wedge member. 11A and 11B are diagrams of the wedge member shown in FIG. 9, where (a) is a perspective view and (b) is a cross-sectional view taken along line XI-XI. FIG. 12 is a plan view of a derailment prevention guard system for slab track, which includes the first derailment prevention guard device for slab track shown in FIG. 2 and the falling-off prevention device shown in FIG. 8. FIG. 13 is a front view of the first slab track derailment prevention guard device shown in FIG. 1 when preventing derailment. FIG. 14 is a front view of the first slab track derailment prevention guard device shown in FIG. 1 when deviation is prevented.

An embodiment of the present application will be described below with reference to the drawings. The following embodiment describes a first slab track derailment prevention guard device 20 and a second slab track derailment prevention guard device 80, which arrange guard materials 10 along the main track rail 200 installed in the track direction L of a slab track 1 (frame-type slab), and a slab track derailment prevention guard system 100 equipped with the first slab track derailment prevention guard device 20. The first slab track derailment prevention guard device 20 and the second slab track derailment prevention guard device 80 are examples. Note that in this specification and claims, the concept of direction is that the direction in which the main track rail 200 extends is referred to as the track direction L, and the direction perpendicular to the track direction L is referred to as the track width direction M, as shown in Figure 12.

(First slab track derailment prevention guard device)
Fig. 1 is a front view showing a first slab track derailment prevention guard device 20 according to one embodiment. Fig. 2 is a plan view of the first slab track derailment prevention guard device 20 shown in Fig. 1. Fig. 3 is a perspective view showing the first slab track derailment prevention guard device 20 shown in Fig. 1 from below. Fig. 3 shows the first slab track derailment prevention guard device 20 excluding the variable pad 40.

As shown in Figures 1 and 2, the first embodiment of the derailment prevention guard device 20 for slab track comprises a guard material 10 arranged along the main rail 200, a guard retaining member 21 that secures the guard material 10, and an attachment member 35 that attaches the guard material 10 to the guard retaining member 21. Furthermore, a variable pad 40 is provided between the underside 22 of the guard retaining member 21 and the slab track 1 as a gap closing member that fills the gap G between the upper surface 2 of the slab track 1 and the guard retaining member 21.

The guard retaining member 21 is integrally formed with a fixing portion 24 that is fixed to the bottom 201 of the main rail 200. The fixing portion 24 has a locking portion 25 that locks onto one widthwise end of the bottom 201 of the main rail 200, and a fixing member 26 that clamps the other widthwise end of the bottom 201 of the main rail 200. With the locking portion 25 locked onto one widthwise end of the bottom 201 of the main rail 200, the guard retaining member 21 is fixed to the other widthwise end of the bottom 201 of the main rail 200 by the fixing member 26. The fixing member 26 is fixed to the guard retaining member 21 by a fixing bolt 27. In this embodiment, the fixing bolt 27 is a T-bolt that can be attached and fixed from above.

The guard retaining member 21 has a retaining portion 28 that holds the guard material 10 at a position diagonally above the locking portion 25. The retaining portion 28 has arm portions 29 that form U-shaped openings at both ends in the track direction L, allowing the web portion 11 of the guard material 10 to be inserted and held from above. An attachment member 35 is attached between the arm portions 29.

The portion of the retaining portion 28 that retains the guard material 10 is provided with an engaging protrusion 30 (engagement portion) in the track direction L that fits into an engaging recess 15 (engagement portion) provided in the longitudinal direction of the web portion 11 of the guard material 10. In this embodiment, the engaging recess 15 is provided in the web portion 11 of the guard material 10, and the engaging protrusion 30 is provided in the retaining portion 28 of the guard retaining member 21, but these may be arranged in reverse.

The guard material 10 has a generally T-shaped cross section, with a web portion 11 fixed to the retaining portion 28 of the guard retaining member 21 and a flange portion 12 provided at the upper end of the web portion 11 and extending horizontally. One horizontal end of the flange portion 12 is an outer abutment portion 13, and the other end is an inner abutment portion 14. While held by the retaining portion 28 of the guard retaining member 21, the guard material 10 is fixed in place by fastening the mounting member 35 to the guard retaining member 21 with a fixing bolt 36. The fixing bolt 36 is screwed into a nut 36c held in place. When the guard material 10 is fixed to the guard retaining member 21, the engagement recess 15 engages with the engagement protrusion 30 of the guard retaining member 21.

The guard material 10 of the guard retaining member 21 fixed to the main rail 200 has the upper end position of the outer abutment portion 13 positioned at a predetermined distance A from the side of the head 202 of the main rail 200 and at a height B above the top surface of the head 202.

In addition, in this embodiment, an insulating material 38 is provided between the guard material 10 and the guard holding member 21 and mounting member 35. The insulating material 38 can be made of glass fiber cloth or the like. Providing the insulating material 38 prevents electrical conductivity between the main rail 200 and the guard material 10. Note that if there is no concern about electrical conductivity, there is no need to provide the insulating material 38.

In addition, a rotation-preventing member 50 is provided at the head 36a of the fixing bolt 36 that fixes the mounting member 35 to the guard retaining member 21 to prevent rotation and keep the fixing bolt 36 fixed. Details of the rotation-preventing member 50 will be described later. After the rotation-preventing member 50 is provided at the head 36a of the fixing bolt 36, a retaining pin 37 is inserted into the pin hole 36b of the head 36a. The retaining pin 37 prevents the rotation-preventing member 50 from moving in a direction that would remove it from the head 36a of the fixing bolt 36.

The first slab track derailment prevention guard device 20 may be configured without the anti-rotation member 50, but providing the anti-rotation member 50 can extend the inspection interval for the fixing bolts 36, for example.

In addition, by providing variable pads 40 between the undersides of the guard retaining members 21 and the upper surface of the slab track 1, the gap G between the upper surface 2 of the slab track 1 and the underside 22 of the guard retaining members 21 is filled. The height dimension of the gap G at the position of each guard retaining member 21 varies slightly depending on the construction state of the slab track 1, but this difference can be absorbed by the amount of expansion of the variable pads 40. Figures 1 and 2 show the first slab track derailment prevention guard device 20 fixed in place, with the gap G filled by the variable pads 40. The core material 44 of the variable pad 40 is larger than the underside of the guard retaining member 21. The variable pads 40 transmit the force acting on the guard retaining member 21 to the slab track 1, allowing it to be received by the slab track 1. Therefore, with the first slab track derailment prevention guard device 20, when a load acts on the guard material 10 fixed to the guard retaining member 21, the load can be appropriately received by the slab track 1 from the guard retaining member 21 via the variable pads 40. Details of the variable pad 40 will be described later.

As shown in FIG. 3, the guard retaining member 21 has an uneven portion 23 on its underside 22. The uneven portion 23 has a peripheral convex portion 23a, a cross-shaped central convex portion 23b in the center, and an intermediate concave portion 23c between them. When the variable pad 40 is expanded due to this uneven portion 23, as described below, the variable pad 40 deforms to fit into the intermediate concave portion 23c on the underside 22 of the guard retaining member 21, and after hardening, it remains inserted between the peripheral convex portion 23a and the central convex portion 23b.

(Variable pad)
4A and 4B are drawings showing the variable pad 40 of the first slab track derailment prevention guard device 20 shown in Fig. 1, with (a) being a plan view and (b) being a side view. In this embodiment, the variable pad 40 has a main body 41 formed in a rectangular shape in a plan view. The main body 41 has a rectangular shape that is larger than the lower surface 22 (Fig. 4) of the guard holding member 21. The main body 41 is formed in a deformable bag shape, and is provided with an injection port 42 for injecting a resin material therein and an exhaust port 43 for discharging the air therein at diagonal positions.

The main body 41 has a core material 44 inside that is large enough to contact the underside of the guard retaining member 21. The main body 41 is filled with resin material by injecting resin material into the interior through the injection port 42, and then exhausting the air from the interior through the exhaust port 43. A hardening resin material is used as the resin material.

When this type of variable pad 40 is filled with resin material inside the main body 41, it swells to fit into the intermediate recess 23c on the underside 22 of the guard retaining member 21, deforming to engage with the outer circumferential protrusion 23a and central protrusion 23b. As the internal resin material hardens, it maintains its engagement with the uneven portion 23 (as shown in Figure 1). In other words, the variable pad 40 deforms to fit the shape of the underside of the guard retaining member 21 with which its upper surface is in contact, and as the resin material filled inside hardens, it maintains its shape. The injection port 42 and exhaust port 43 of the variable pad 40 may be removed after the internal resin material has hardened.

(Mounting member)
5 is a perspective view showing the mounting member 35 of the first slab track derailment prevention guard device 20 shown in FIG. 1. The mounting member 35 in this embodiment is rectangular, with a width dimension sufficient to fit between the arms 29 attached to the retaining portion 28 of the guard retaining member 21. The mounting member 35 has a back surface 35a that contacts the lower portion of the retaining portion 28 of the guard retaining member 21 and the web portion 11 of the guard material 10, and a front surface 35b against which the head 36a of the fixing bolt 36 ( FIG. 1 ) abuts. A bolt hole 35c for the fixing bolt 36 is provided from the front surface 35b toward the back surface 35a. A recessed step 35d for engaging the locking portion 53 of the anti-rotation member 50 is provided at the bottom of the front surface 35b.

(Rotation prevention member)
6A and 6B are diagrams showing the anti-rotation member 50 of the first slab track derailment prevention guard device 20 shown in Fig. 1, with (a) being a front view and (b) being a side view. The anti-rotation member 50 of this embodiment has an anti-rotation part 51 having an insertion part 52 into which the head part 36a of the fixing bolt 36 is inserted, and an engaging part 53 that engages with the step part 35d at the bottom of the mounting member 35.

The anti-rotation portion 51 has a predetermined thickness H and is provided with an insertion portion 52 in its central portion, into which the head 36a of the fixing bolt 36 (Figure 1) is inserted. The insertion portion 52 is provided with multiple engagement protrusions 52a around its periphery that engage with the head 36a of the fixing bolt 36. In this embodiment, twelve engagement protrusions 52a are provided to engage with the corners of the hexagonal head 36a. The thickness H of the anti-rotation portion 51 is set so that the pin hole 36b provided in the head 36a of the fixing bolt 36 protrudes to the outside.

The anti-rotation member 50 has a locking portion 53 below the anti-rotation portion 51 that protrudes toward the mounting member 35. The locking portion 53 consists of two protruding portions provided at both ends in the width direction. The portion of the locking portion 53 that locks onto the step portion 35d of the mounting member 35 is inclined outward, allowing it to be locked in an inclined state depending on the position of the corner of the head 36a (Figure 3). The locking portion 53 locks onto the step portion 35d of the mounting member 35 at two points, thereby preventing the anti-rotation member 50 from rotating in either the clockwise or counterclockwise direction.

(Falling prevention device)
Fig. 7 is a front view showing a displacement prevention device 60 according to one embodiment. Fig. 8 is a plan view of the displacement prevention device 60 shown in Fig. 7. As shown in Figs. 7 and 8, the displacement prevention device 60 of this embodiment includes a fixed base 61 fixed to the bottom 201 of the main rail 200, and a guard material support block 62 fixed to the fixed base 61 with the web portion 11 of the guard material 10 inserted therethrough.

The fixed base 61 has a fixing portion 63 that is fixed to the bottom 201 of the main rail 200. The fixing portion 63 has a locking portion 64 that engages with one widthwise end of the bottom 201 of the main rail 200, and a fixing member 65 that clamps the other widthwise end of the bottom 201 of the main rail 200. With the locking portion 64 engaged with one widthwise end of the bottom 201 of the main rail 200, the fixed base 61 is fixed to the other widthwise end of the bottom 201 of the main rail 200 by the fixing member 65. The fixing member 65 is fixed to the fixed base 61 by a fixing bolt 66. In this embodiment, the fixing bolt 66 is a T-bolt that can be fixed from above. The fixed base 61 has an attachment portion 67 for the guard material support block 62 in the direction of the locking portion 64. The attachment portion 67 has a slightly recessed recess 67a.

The guard material support block 62 has an engaging member 69 with an insertion portion 68 through which the web portion 11 of the guard material 10 is inserted, and a base plate 70 fixed to the lower end of the engaging member 69 and attached to the mounting portion 67 of the fixed base 61. The engaging member 69 and base plate 70 are integrally formed. The insertion portion 68 has an engaging protrusion 71 (engagement portion) that engages with the engaging recess 15 (engagement portion) of the guard material 10. The insertion portion 68 is designed so that the engaging recess 15 and the engaging protrusion 71 engage when the guard material 10 is inserted in the track direction L. With the guard material 10 inserted into the insertion portion 68, the base plate 70 of the guard material support block 62 is fixed to the mounting portion 67 with a fixing bolt 72. In this embodiment, the fixing bolt 72 is a T-bolt that can be fixed from above. The base plate 70 of the guard material support block 62 is fixed in place in a recess 67a provided in the mounting portion 67 of the fixed base 61. This allows the guard material support block 62 to be fixed in a predetermined position on the fixed base 61.

Installation of the fall prevention device 60 is completed when the fixed base 61 is fixed to the bottom 201 of the main line rail 200 by the locking portion 64 and the fixing member 65. The fall prevention device 60 attached to the main line rail 200 is floating above the top surface 2 of the slab track 1, and installation is completed with a gap G. Because the fixed base 61 of the fall prevention device 60 is fixed to the main line rail 200, the engagement recess 15 of the guard material 10 engages with the engagement protrusion 71 of the guard material support block 62, preventing upward movement from the insertion portion 68. Therefore, the fall prevention device 60 can prevent the guard material 10 from shifting position.

(Second slab track derailment prevention guard device)
FIG. 9 is a front view showing a second slab track derailment prevention guard device 80 according to a second embodiment. FIG. 10 is a front view showing the second slab track derailment prevention guard device 80 shown in FIG. 9 in a fixed state. FIG. 11 is a drawing of the wedge member 90 shown in FIG. 9, where (a) is a perspective view and (b) is a cross-sectional view taken along line XI-XI. The second slab track derailment prevention guard device 80 has substantially the same configuration as the first slab track derailment prevention guard device 20 described above, differing only in that it includes a wedge member 90 instead of the variable pad 40. Therefore, the description of the second slab track derailment prevention guard device 80 will focus on only the parts that differ from the first slab track derailment prevention guard device 20. The same components as those in the first slab track derailment prevention guard device 20 are designated by the same reference numerals, and their description will be omitted.

As shown in Figure 9, the second slab track derailment prevention guard device 80 is equipped with a wedge member 90 as a gap closing member that fills the gap G between the underside 82 of the guard retaining member 81 and the upper surface 2 of the slab track 1. The underside 82 of the guard retaining member 81, below the retaining portion 28 that retains the guard material 10, is formed at a predetermined slope S in the track width direction M (left-to-right direction on the page). As shown, the portion of the underside 82 where the slope S is formed is formed in a predetermined range T, expanding upward from below the portion of the guard retaining member 81 where the guard material 10 is retained toward the outer end. The predetermined range T includes the area below the retaining portion 28 of the guard retaining member 81 that retains the web portion 11 of the guard material 10, and is a range that can withstand forces acting on the guard material 10. In this embodiment, the slope S is formed in the predetermined range T of the underside 82 below the guard material 10.

As shown in Figure 10, in the second slab track derailment prevention guard device 80, a wedge member 90 with a sloped portion 91 of the same slope S is inserted and driven into the portion of the underside 82 of the guard retaining member 81, which has a slope S. As a result, the wedge member 90 fills the gap G between the portion of the underside 82 of the guard retaining member 81 with slope S and the upper surface 2 of the slab track 1.

As shown in Figure 11(a), the wedge member 90 of this embodiment has a sloped portion 91 with a predetermined gradient in the center, and rising portions 92 that rise upward at both ends of the sloped portion 91. The sloped portion 91 is wider than the dimension of the guard retaining member 81 in the track direction L. When the sloped portion 91 is inserted into the underside 82 of the guard retaining member 81, the rising portions 92 are positioned on both outer sides of the guard retaining member 81. The rising portions 92 have elongated locking holes 93 that extend in the track width direction M. The slope S of the sloped portion 91 shown in Figure 11(b) is set to, for example, approximately 1/15 to 1/25.

As shown in Figure 10, in the second slab track derailment prevention guard device 80, the wedge member 90 is inserted between the underside 82 of the guard retaining member 81 and the top surface 2 of the slab track 1, and is driven in from the outside to the inside in the track width direction M. This causes the wedge member 90 to fill the gap G. The height dimension of the gap G at the position of each guard retaining member 81 varies slightly depending on the construction state of the slab track 1, but this difference can be absorbed by the amount of driving the wedge member 90. After the wedge member 90 is driven into the gap G between the guard retaining member 81 and the slab track 1, a pin 94 is driven from the elongated locking hole 93 toward the elongated locking hole 83 of the guard retaining member 81. The pin 94 is positioned so that it protrudes from the locking hole 83 of the guard retaining member 81 toward the elongated locking hole 93. Even if the wedge member 90 attempts to come out of the gap G between the guard retaining member 81 and the slab track 1, the locking slot 93 is locked onto the pin 94, preventing it from falling out. This is the locking mechanism. Note that the locking mechanism may also be a mechanism other than the pin 94, such as a wire, bolt and nut, that prevents the wedge member 90 from falling out.

With the second slab track derailment prevention guard device 80 configured in this manner, the gap G between the underside 82 of the guard retaining member 81 and the upper surface 2 of the slab track 1 is filled with a wedge member 90 below the guard material 10 fixed to the guard retaining member 81. This allows the force acting on the guard material 10 to be received by the slab track 1 from the underside 82 of the guard retaining member 81 via the wedge member 90. Therefore, with the second slab track derailment prevention guard device 80, when a load acts on the guard material 10 fixed to the guard retaining member 81, the load can be appropriately received by the slab track 1 from the guard retaining member 81 via the wedge member 90.

(Anti-derailment guard system for slab track)
Figure 12 is a plan view of a derailment prevention guard system 100 for slab track, equipped with the first slab track derailment prevention guard device 20 shown in Figure 2 and the fall prevention device 60 shown in Figure 8. This figure shows an example of a joint portion of a frame-type slab as the slab track 1. The slab track derailment prevention guard system 100 of this embodiment further includes a fall prevention device 60 for the guard material 10 in addition to the first slab track derailment prevention guard device 20. The illustrated main line rail 200 is fixed to the slab track 1 by rail fixing parts 210.

In this embodiment, the slab track derailment prevention guard system 100 is provided with a first slab track derailment prevention guard device 20 that arranges guard material 10 along the main rail 200 installed on the slab track 1. The first slab track derailment prevention guard device 20 is installed at a predetermined distance from the gap 3 at the joint of the slab track 1. In this example, one slab track 1 (to the right as shown) is provided with a fall prevention device 60 in a position two positions inward from the gap 3, while the other slab track 1 (to the left as shown) is provided with a fall prevention device 60 in a position three positions inward from the gap 3. The fall prevention device 60 does not have to be located closest to the gap 3 in the slab track 1, and may be located elsewhere.

With this first slab track derailment prevention guard device 20 of the slab track derailment prevention guard system 100, even when guard materials 10 are placed along the main track rail 200 of the slab track 1, it is possible to arrange the guard materials 10 along the main track rail 200 without processing the slab track 1.

In addition, according to this embodiment of the slab track derailment prevention guard system 100, the first slab track derailment prevention guard device 20 is equipped with a rotation prevention member 50 (Figure 1), which prevents the fixing bolts 36 from loosening due to vibrations transmitted from the wheels W of the train V traveling on the main rail 200.

Furthermore, even if the fixing bolt 36 loosens, the guard material 10 will remain in position because the engaging recess 15 of the web portion 11, which is inserted through the insertion portion 68 provided on the guard material support block 62 of the fall prevention device 60, will remain engaged with the engaging protrusion 71, preventing the guard material 10 from shifting position.

Note that Figure 12 illustrates an example of a slab track derailment prevention guard system 100 equipped with a first slab track derailment prevention guard device 20 and a fall prevention device 60, but the slab track derailment prevention guard system 100 may also be configured to combine a second slab track derailment prevention guard device 80 and a fall prevention device 60. The slab track derailment prevention guard system 100 may also be configured to combine a first slab track derailment prevention guard device 20 and a second slab track derailment prevention guard device 80, or to combine these with a fall prevention device 60. The first slab track derailment prevention guard device 20 and the second slab track derailment prevention guard device 80 can be used depending on the slab track 1.

(Function of derailment prevention guard devices)
Figure 13 is a front view of the first slab track derailment prevention guard device 20 shown in Figure 1 when preventing derailment. Figure 14 is a front view of the first slab track derailment prevention guard device 20 shown in Figure 1 when preventing deviation. Based on these figures, derailment prevention and deviation prevention of a train V by the first slab track derailment prevention guard device 20 will be explained. Note that deviation prevention protrusions D are provided on the underside of the train V at predetermined intervals in the longitudinal direction (for example, at the front and rear positions of one car of the train V) to come into contact with the inner abutment portions 14 of the guard material 10 when the wheels W derail, thereby preventing the train V from deviating significantly from the track.

As shown in Figure 13, when a large load F (in this example, a lateral force from the right side of the figure) acts on a train V traveling on the main rail 200, one wheel (on the left side of the figure) rides up onto the top surface of the main rail 200, while the inside of the other wheel W (on the right side of the figure) comes into contact with the outer abutment portion 13 of the guard material 10, thereby being guarded. In this state, the wheel W on the right side of the figure is traveling on the main rail 200, preventing derailment of the wheel W.

As shown in Figure 14, if the load F increases further and the wheels W derail beyond the guard material 10, the load F will cause the train V to try to fly out of the track (to the left in the figure), but the deviation prevention protrusion D provided on the bottom of the train V will come into contact with the inner abutment portion 14 of the guard material 10, preventing further deviation. As a result, even if the train V derails from the main line rail 200, the train V can be stopped without coming into contact with an oncoming train. Therefore, even if the train V derails from the main line rail 200 during an earthquake, for example, it can be prevented from deviating significantly from the slab track 1.

In the above embodiment, a configuration was described in which the first slab track derailment prevention guard device 20 and the fall prevention device 60 were included. However, the configuration may also include only the first slab track derailment prevention guard device 20 without the fall prevention device 60, and the present application is not limited to the above embodiment.

Furthermore, the same applies whether a portion of the first slab track anti-derailment guard device 20 is a second slab track anti-derailment guard device 80 or whether the entire device is a second slab track anti-derailment guard device 80, and the present application is not limited to the above embodiment.

Furthermore, while an example in which a rotation prevention member 50 is provided has been described, other measures to prevent loosening of the fixing bolt 36 may also be provided, and the present application is not limited to the above-described embodiment.

Furthermore, the above-described embodiment is merely an example, and various modifications are possible within the scope of the present application, and the present application is not limited to the above-described embodiment.

1. Slab track (frame slab)
2 Top surface
3 Gap 10 Guard material 11 Web portion 12 Flange portion 13 Outer abutment portion 14 Inner abutment portion 15 Engagement recess (engagement portion)
20 First slab track derailment prevention guard device 21 Guard holding member 22 Underside 23 Concave and convex portion 24 Fixing portion 25 Locking portion 26 Fixing member 27 Fixing bolt 28 Holding portion 29 Arm portion 30 Engaging convex portion (engaging portion)
35 Mounting member 35d Step portion 36 Fixing bolt 36a Head portion 36b Pin hole 37 Retaining pin 38 Insulating material 40 Variable pad (gap closing member)
44 Core material 50 Anti-rotation member 51 Anti-rotation portion 52 Insertion portion 52a Engagement protrusion 53 Locking portion 60 Fall-off prevention device 61 Fixed base 62 Guard material support block 63 Fixing portion 64 Locking portion 65 Fixing member 66 Fixing bolt 68 Insertion portion 69 Engagement member 70 Base plate 71 Engagement protrusion (engagement portion)
72 Fixing bolt 80 Second slab track derailment prevention guard device 81 Guard holding member 82 Underside (inclined surface)
83 Engagement hole (locking mechanism)
90 Wedge member (gap closing member)
91 Slope portion 92 Rising portion 93 Engagement slot (locking mechanism)
94 Pin (locking mechanism)
100: Derailment prevention guard system for slab track 200: Main line rail 201: Bottom 202: Head

Claims (7)

Guard materials to be installed along the main rail;
a guard holding member that holds the guard material;
an attachment member for attaching the guard material to the guard holding member;
a gap closing member that is attached between the lower surface of the guard retaining member and the upper surface of the slab track to close the gap between the lower surface of the guard retaining member and the upper surface of the slab track,
The guard holding member is integrally formed with a fixing portion for fixing to the main rail,
the gap closure member is a variable pad that is deformable in a thickness direction,
the guard holding member has a concave-convex portion on a lower surface with which the variable pad comes into contact,
the concave-convex portion has a central convex portion and an outer peripheral convex portion that includes the central convex portion in a bottom view,
The derailment prevention guard device for a slab track , wherein the variable pad has a core material in an area where it contacts the lower surface of the guard retaining member . Guard materials to be installed along the main rail;
a guard holding member that holds the guard material;
an attachment member for attaching the guard material to the guard holding member;
a gap closing member that is attached between the lower surface of the guard retaining member and the upper surface of the slab track to close the gap between the lower surface of the guard retaining member and the upper surface of the slab track,
The guard holding member is integrally formed with a fixing portion for fixing to the main rail,
the gap closure member is a wedge member,
the wedge member has a sloped portion inserted between the lower surface of the guard retaining member and the slab track,
a guard retaining member having a lower surface at a lower position of the guard material that has the same slope as the sloped portion of the wedge member in a direction intersecting the extending direction of the guard material , and having a locking mechanism that prevents the wedge member from falling off. 3. The derailment prevention guard device for a slab track according to claim 1 or 2 , further comprising: a fixing bolt that fixes the mounting member to the guard holding member; and a rotation prevention member that keeps the fixing bolt in a fixed state and prevents it from rotating. 4. The derailment prevention guard device for a slab track according to claim 1, wherein the guard material has an outer abutment portion that prevents wheels from derailing inwardly of the main line rail, an inner abutment portion that prevents a derailed train from departing outwardly from the track, and a web portion that is fixed to the guard retaining member. 5. The derailment prevention guard device for a slab track according to claim 4, further comprising an engaging portion that engages with the web portion of the guard material and a holding portion of the guard holding member that holds the guard material in the longitudinal direction of the guard material. a plurality of derailment prevention guard devices for a slab track according to claim 5 provided in the extending direction of the main rail;
The slab track further includes a guard material drop prevention device located inside the slab track derailment prevention guard device provided at the end of the slab track,
The anti-fall-off device includes a fixed base that is fixed to the main line rail, and a guard material support block that has a concave-convex portion that engages with a concave-convex portion formed on the web portion of the guard material. A derailment prevention guard system for slab track comprising a plurality of derailment prevention guard devices for slab track in the direction in which the main track rail extends,
The derailment prevention guard device for a slab track is
a guard material disposed along the main rail;
a guard holding member that holds the guard material;
an attachment member for attaching the guard material to the guard holding member;
a gap closing member that is attached between the lower surface of the guard retaining member and the upper surface of the slab track to close the gap between the lower surface of the guard retaining member and the upper surface of the slab track,
The guard holding member is integrally formed with a fixing portion for fixing to the main rail,
the guard material has an outer abutment portion that prevents the wheels from derailing toward the inside of the main rail, an inner abutment portion that prevents the derailed train from departing toward the outside of the track, and a web portion that is fixed to the guard holding member,
The guard holding member has an engaging portion that engages with the web portion of the guard material and a holding portion of the guard holding member that holds the guard material in the longitudinal direction of the guard material,
The slab track further includes a guard material drop prevention device located inside the slab track derailment prevention guard device provided at the end of the slab track,
the fall prevention device includes a fixed base fixed to the main rail, and a guard material support block having a concave-convex portion that engages with a concave-convex portion formed on the web portion of the guard material,
The guard material support block and the fixed base are configured to be detachable,
a guard material support block having an insertion portion through which the web portion of the guard material is inserted in the track direction, the insertion portion being provided with the uneven portion;