JP2744761B2 - Sleeper anti-vibration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sleeper vibration damping device capable of holding a sleeper or a pad for a bottom surface in a replaceable manner.

[0002]

2. Description of the Related Art Conventionally, an elastic material (bottom pad) is provided integrally on a bottom surface of a vibration isolating sleeper (not shown) for absorbing vibration generated when a vehicle passes and reducing noise. This elastic material is integrally provided by an adhesive, a bolt and a nut. If the sleeper is made of concrete, place the manufactured sleeper in a formwork larger than the sleeper to create a gap between the sleeper and the formwork, and place urethane resin, which is an elastic body, in this gap. By injecting and solidifying, the elastic body is provided integrally with the sleeper.

[0003]

However, such an anti-vibration sleeper has the following problems. (1) When attaching an elastic material with an adhesive, it is necessary to form the bottom of the sleeper smoothly, and it takes time to manufacture the sleeper. (2) When the elastic material is attached with bolts and nuts, it is necessary to embed the nuts in the sleepers, and the operation is complicated, and the manufacture of the sleepers is troublesome. (3) When the elastic material is a bolt or a nut, a great deal of time is required for mounting and removing the elastic material. (4) Further, if the elastic material is attached with bolts and nuts, the bolts and nuts may rust with each other, making it impossible to replace the elastic material. (5) Since the elastic material is provided integrally with the sleeper, it takes a lot of trouble to replace the elastic material with a different elastic coefficient, or to replace the aged elastic material, or it is impossible to replace it. In such a case, difficult work is forced. (6) There are vibration-absorbing sleepers that are made by putting the elastic material for the bottom surface and the elastic material for the side surface in a pre-manufactured box and then putting the sleeper in the box. There is a risk that earth and sand or dust may enter the gap between the box and the sleeper. Also, if you want to prevent the intrusion of dirt and dust,
A dust cover is required, and the structure becomes complicated.

[0004]

SUMMARY OF THE INVENTION The present invention provides a sleeper receiving a sleeper having a rectangular bottom plate and three rising walls provided on three sides of the bottom plate and having a trapezoidal cross section in the width direction. And a bottom pad having elasticity interposed between the bottom plate and the bottom surface of the sleeper, and inserted between the opposing rising wall and the longitudinal side surface of the sleeper among the three rising walls. A long elastic side pad having an insertion portion formed therein, a ridge formed on one of the opposed rising wall and the side pad, and a groove formed on the other to receive the ridge. The above problem has been solved by a sleeper vibration isolator having a wedge-shaped cross section in the thickness direction of the insertion portion.

[0005]

[Function] The sleeper anti-vibration device is mounted on the sleeper in advance at the factory, carried to the railroad track laying site, and the portion of the sleeper rest is embedded in the track bed. To attach the vibration isolator to the sleeper, first, a pad for the bottom is laid on the bottom plate of the sleeper receiver. Thereafter, the sleepers are attached to both ends of the sleeper, and the side pad is inserted between the longitudinal side of the sleeper and the rising wall of the sleeper.

[0006] The side pad is inserted from the middle part to the end part in the longitudinal direction of the sleeper. Due to the dimensional tolerance or error in the width direction of the sleeper, even if the gap between the sleeper and the rising wall of the sleeper tray differs for each sleeper,
Since the cross-sectional shape in the thickness direction of the side surface pad is formed in a wedge shape, the side surface pad is inserted while absorbing a dimensional tolerance or error.

In this way, the sleeper vibration isolator
It is attached to both ends of the sleeper and transported to the railway track laying site, where the sleeper rest is embedded in the trackbed. When the rail extends and deforms upward in the long rail section as the temperature rises, the sleeper is lifted off the roadbed by the rail and attempts to move upward. However, the side pad cannot move upward due to friction between the side pad and the sleeper pad.

As a result, the side pads prevent the rise of the sleepers and prevent the rail from being deformed. The replacement of the sleeper is carried out after the side pad is removed and lifted and removed from the sleeper receiver. The bottom pad is replaced by removing the side pad and lifting the sleeper to form a clearance required for replacement between the bottom surface of the sleeper and the sleeper receiver, and then removing the pad.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Sleeper anti-vibration device 20 (see FIG. 2)
Is a device that replaceably holds a sleeper C and a bottom pad 21 (see FIG. 1) on a track bed A of a railway track, and absorbs vibration when a vehicle passes to reduce noise.
The roadbed A is a concrete roadbed.

The cross section in the width direction of the sleeper C supported by the sleeper vibration isolator 20 is formed in a trapezoidal shape.
Hard materials such as concrete, synthetic resin, and steel are used for the sleeper C. On the upper surface of the sleeper C, concave portions C1 and C1 (see FIG. 2) for supporting a pair of rails (not shown) are formed.

The sleeper vibration isolator 20 (see FIG. 1)
Sleeper pad 22, bottom pad 21, side pad 2
3. It is composed of end surface pads 24 (see FIG. 4) and the like. The sleeper pad 22 (see FIG. 5) includes a rectangular bottom plate 31 and three rising walls 32, 32, and 33 erected on three sides of the bottom plate 31. That is, the sleeper pad 22 is formed in a case shape in which two of the six surfaces of the box are open.

The sleeper pad 22 is embedded in the roadbed, and supports a pair of both ends of the sleeper C except for a part at the center. The sleeper pad 22 is formed of plastic such as hard foamed urethane, polyester resin, polyamide resin, and epoxy resin. When the hard urethane foam is used, it is harder to spread the fire than other resins in the event of a fire (has self-extinguishing properties), generates less toxic gas, and is excellent in terms of safety. Is obtained. An interval L (see FIG. 1) between a pair of side rising walls (opposing rising walls) 32 of the sleeper catch 22 is set to be wider than the width W of the bottom of the sleeper C.

The bottom pad 21 is a flat member interposed between the bottom plate 31 of the sleeper pad 22 and the bottom surface C2 of the sleeper C. The side surface pad 23 is a long member mounted between the pair of side rising walls 32, 32 of the sleeper pad 22 and the side surfaces C3, C3 in the longitudinal direction of the sleeper C. The cross-sectional shape in the thickness direction of the insertion portion 34 of the side pad 23 is formed in a wedge shape so as to be easily inserted between the side surface of the sleeper C and the sleeper catch 22.

A groove 35 is formed in the longitudinal direction of the side pad 23. Side rising wall 32 of sleeper catch 22
An inwardly projecting ridge 36 is formed at the upper end of. Groove 35
The upper end of the side pad 23 covers the upper end of the side rising wall 32 due to the combination of the ridge 36 and the ridges 36. Is prevented from entering. Although not shown, a ridge is formed on the side surface pad 23 and the side rising wall 3 is formed.
2, a groove may be formed. An inclined surface 37 that contacts the insertion portion 34 of the pad 23 for the side surface is formed at an intermediate portion in the height direction of the side rising wall 32. Groove 3 of side pad 23
5 and the ridge 36 of the side rising wall 32 are engaged with each other. Therefore, when the side surface pad 23 is inserted between the side rising wall 32 and the sleeper C, the pad 23 is prevented from falling out along the slope of the side surface C3 of the sleeper C.

The end surface pad 24 (see FIG. 4) is a plate-shaped member inserted between the end surface C4 of the sleeper C and the end rising wall 33 of the sleeper receiver 22 facing the end surface C4. . The end surface pad 24 is formed in a T-shape, and a groove 41 is formed at the upper end along the longitudinal direction. A ridge 42 is formed on the upper end of the end rising wall 33. Groove 4
1 and the ridge 42 are engaged with each other to regulate the end surface pad 24 so as not to come out upward. The side surface pad 23, the bottom surface pad 21, and the end surface pad 24 are made of synthetic rubber such as styrene butadiene rubber, neoprene rubber, and urethane rubber.

Next, a procedure for providing the sleeper C on the roadbed by using the sleeper vibration isolator 20 will be described.
The sleeper vibration isolator 20 is mounted on the sleeper C in advance at the factory and transported to the railroad track laying site, where the sleeper receiver 22 is mounted.
Is embedded in the trackbed. First,
The pad 21 for the bottom surface is laid on the bottom plate 31 of the sleeper pad 22, and the pad 24 for the end surface is leaned against the end rising wall 33. Then, the sleeper catches 22 are attached to both ends of the sleeper C. Thereafter, the side pad 24 is inserted into the gap S1 from the longitudinal center of the sleeper C toward the end.

The sleeper vibration isolator 20 incorporated in the sleeper C is held by the sleeper C so as not to be dropped off by a belt or the like, and is carried to a railway track laying site. In the sleeper vibration isolator 20 carried to the railway track laying site, a portion of the sleeper receiver 22 is embedded in the roadbed A. Thereafter, the belt and the like are removed.

The sleeper vibration isolator 20 embedded in the track bed A receives the load of the sleeper C, rails, fastening devices, passing vehicles, and the like, and absorbs vibrations when the vehicles pass. That is, the sleeper C is provided with elastic bottom pads 21 and side pads 2 in the sleeper receiver 22.
3, received by the end surface pads 24, the bottom surface pads 21, the side surface pads 23, and the end surface pads 24 absorb vibration of the vehicle and reduce noise. Further, the side pad 23 fills the gaps S1 and S1 (see FIG. 1) between the sleeper pad 22 and the side surface C3 of the sleeper C to prevent dust from entering the sleeper pad 22. Elastic deterioration of the bottom surface pad 21 is prevented.

When the bolt of the fastening device and the sleeper C are damaged due to long-term use, the side pad 23 is removed from the sleeper receiver 22 along the groove 35 and the ridge 36, The damaged sleeper C is lifted and replaced with a new sleeper C. In addition, pad 21 for bottom,
If the end face pad 24 is deteriorated in elasticity or damaged, the side face pad 23 is pulled out from the sleeper catch 22 along the groove 35 and the ridge 36, and the sleeper C is lifted up to a lower portion of the sleeper C. After a gap is formed, the pad 21 for a new bottom surface and the pad 24 for an end surface are replaced. Therefore, the sleeper C, the bottom pad 21 and the end pad 24 can be easily exchanged.

The dimensional tolerance and processing error of the sleeper C are absorbed by the side pad 23 which has elasticity and is formed in a wedge shape. When the width of the sleeper C is narrow, the side pad 23 is inserted below the sleeper holder 22 as shown in FIG. 15, and when the width is wide, the pad 23 is inserted into the sleeper receiver 22 as shown in FIG. Is inserted above. That is, the side surface pad 23 absorbs the dimensional tolerance or error in the width direction of the sleeper C at the wedge-shaped portion.

In the long rail section, when the rail extends and deforms upward due to an increase in temperature, the sleeper C is lifted from the roadbed A by the rail and tends to move upward. That is, the sleeper C tries to float from the roadbed A. However, the side pad 23 is the side pad 2
The upward movement is prevented by the friction between 3 and the slope 37 of the sleeper pad 22.

If the side pad 23 rises integrally with the sleeper C against the above friction, the engagement of the ridge 36 and the groove 35 prevents the sleeper from floating. As a result, the side pads 23 prevent the sleepers C from rising and prevent the rails from being deformed.

[0023]

The sleeper anti-vibration device of the present invention has the following effects. (1) The sleepers are received by the sleepers without using an adhesive, bolts and nuts, so that the shape of the sleepers can be simplified. (2) By removing the side pad 23 from between the sleeper and the sleeper pad, the bottom pad and the sleeper can be easily and quickly replaced. (3) The pad for the bottom surface and the pad for the side surface have elasticity, so that vibrations when passing through the vehicle can be absorbed and noise can be reduced. (4) Since the cross-sectional shape in the thickness direction of the side surface pad is formed in a wedge shape, the sleeper can be held by absorbing the dimensional tolerance and manufacturing error of the sleeper. (5) Since the side pad is inserted between the sleeper and the sleeper pad, dust can be prevented from entering the sleeper pad, and the elasticity of the bottom pad can be prevented. (6) When the sleepers are lifted off the trackbed and are about to float as the rails elongate due to a rise in temperature, the side pads rise together with the sleepers due to the friction between the side pads and the sleeper catches Since the sleeper is received without performing, the lifting of the sleeper can be prevented. (7) If the side pad rises integrally with the sleeper against the above-mentioned friction, the lifting of the sleeper is prevented by the engagement between the ridge and the groove.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a sleeper vibration isolator according to the present invention, and is a cross-sectional view taken along line 1-1 in FIG.

FIG. 2 is a diagram of FIG. 1 viewed from the right side.

FIG. 3 is a view of FIG. 2 as viewed from the left side.

FIG. 4 is a sectional view taken along arrow 4-4 in FIG.

FIG. 5 is a perspective view of a sleeper tray.

FIG. 6 is a plan view of a sleeper tray.

7 is a sectional view taken along the arrow 7-7 in FIG. 6;

FIG. 8 is a view of the sleeper tray of FIG. 6 viewed from the right side.

FIG. 9 is a perspective view of a side pad.

FIG. 10 is a longitudinal side view of the side pad of FIG. 9;

11 is a view of the side pad of FIG. 10 as viewed from the right side.

FIG. 12 is a perspective view of an end surface pad.

FIG. 13 is a longitudinal side view of the end face pad of FIG. 12;

14 is a view of the end face pad of FIG. 13 as viewed from the right side.

FIG. 15 is a mounting state diagram of a side pad mounted between a narrow sleeper and a sleeper pad.

FIG. 16 is a mounting state diagram of a side pad mounted between a wide sleeper and a sleeper pad.

[Explanation of symbols]

C sleepers C2 bottom of sleepers C
3 Side view of sleeper 20 Sleeper anti-vibration device 2
DESCRIPTION OF SYMBOLS 1 Bottom pad 22 Sleeper pad 23 Side pad 3
1 bottom plate 32 side rising wall (opposing rising wall) 3
4 Insert 35 Groove 3
6 ridges

Claims (1)

(57) [Claims] A sleeper receiving a sleeper having a square bottom plate and three rising walls provided on three sides of the bottom plate and having a trapezoidal cross section in a width direction; and A length in which an elastic bottom pad interposed between the bottom wall and an insertion portion to be inserted between the opposing rising wall and the longitudinal side surface of the sleeper among the three rising walls is formed. A side pad having elasticity of the scale,
A ridge formed on one of the opposed rising wall and the side surface pad and a groove formed on the other to receive the ridge, and a cross-sectional shape in a thickness direction of the insertion portion is wedge-shaped; Characterized as a sleeper anti-vibration device.