JP2908295B2 - Elastic bearing for sleepers - 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 elastic bearing device installed on a concrete track floor, and more particularly to a sleeper elastic bearing device capable of absorbing a load applied to a sleeper in a vertical direction and a horizontal direction. is there.

[0002]

2. Description of the Related Art As an elastic bearing device for damping concrete railroad sleepers, for example, as shown in FIG. 22, a concrete slab 28 forming a floor of a tunnel is used.
The concrete sleeper 7 supporting the rail 30 is supported on the concrete sleeper 29 via vibration isolating elastic support units 31 disposed at both ends of the concrete sleeper 7. Have been. 32 is a device for fixing the rail 30 to the concrete sleeper 7, and 33 is a drainage gutter at the center of the roadbed.

The above-mentioned vibration-proof elastic bearing unit 31 is shown in FIG.
As shown in FIG. 3, it is composed of an elastic bearing box 25 and an elastic vibration isolating member housed therein. That is, the elastic bearing box 25 has a bottom plate 35, both side plates 36 rising from both side edges of the bottom plate 35, and an outer end plate 37 rising from the outer edge of the bottom plate 35. The inner end is open. At the bottom of the elastic bearing box 35, a bottom elastic pad 38 for load bearing such as elastic rubber is accommodated, and the lower surface of the concrete sleeper 7 is placed on the upper surface thereof. The vertical vibration applied to is absorbed.

[0004] Further, both side surfaces and the outer end surface of the concrete sleeper 7, and both side plates 36 and the outer end plate 3 of the elastic bearing box 25 are provided.
The side elastic pads 26 made of elastic rubber are also interposed between the rubber pads 7 so that the lateral elastic pads 26 absorb the horizontal vibration applied to the concrete sleeper 7.

The side elastic pad 26 for lateral pressure bearing made of an elastic rubber or the like is formed of a band-like member having a substantially rectangular cross section perpendicular to the longitudinal direction (see FIG. 23). The concrete sleeper 7 is bent into a substantially U-shape as viewed from a plane through a thin bent portion.
And the elastic support box 25 is inserted into the gap between the side plates 36 and the outer end plate 37 of the elastic bearing box 25.

[0006] In the side elastic pad 26 for lateral pressure bearing of the above-mentioned conventional construction, simply inserting the pad into the gap between the concrete sleeper 7 and the both side plates 36 of the elastic bearing box 25 and the outer end plate 37 requires a concrete sleeper. Due to the repeated vibration of 7, the side elastic pad 26 may easily escape from the elastic bearing box 25. As means for preventing such a problem, a side elastic pad escape prevention structure using a fixing bolt is implemented.

[0007] As shown in FIGS. 23 and 24, the female screw 15 is provided on both side surfaces and the outer end surface of the concrete sleeper 7.
A plurality of embedding plugs (inserts) 14 are provided at predetermined intervals, while a reinforcing plate 24 is embedded in the side elastic pad 26 for lateral pressure bearing at a position corresponding to the embedding plugs 14 and a plurality of bolts are inserted. A hole 27 is opened, and the side elastic pad 26 is applied to both sides and the outer side of the concrete sleeper 7, and the fixing bolt 18 is inserted into the bolt hole 2.
The screw 7 is screwed into the internal thread 15 of the embedding plug 14.

With the above construction, the side elastic pad 26 is fixed to the concrete sleeper 7, so that even when the sleeper 7 vibrates, the side elastic pad 26 is separated from the sleeper 7, or the elastic support is provided. The problem of escape from the box 25 is eliminated.

[0009]

According to the conventional side elastic pad 26 for lateral pressure bearing, as a means for fixing the side elastic pad 26 in the elastic bearing box 25, the embedding plug 14 with the female screw 15 and the Since the fixing bolt 18 to be screwed is required, the structure of the fixing means is complicated, which leads to an increase in production cost and a trouble in that the construction is troublesome. An object of the present invention is to provide a sleeper elastic support device that solves the above-mentioned problems.

[0010]

In order to achieve the above-mentioned object, an elastic bearing for a sleeper according to the present invention is provided with a bottom plate 1.
And an elastic bearing box 5 having an outer end plate 3 standing upright from an outer edge of the bottom plate 1 and both side plates 2 standing upright from a side edge of the bottom plate 1, and a load bearing elasticity placed on the bottom plate 1. The sleeper 7 is supported by the pad 6, and both side surfaces and the outer end surface of the sleeper 7, the both side plates 2 and the outer end plate 3 of the elastic bearing box 5 are provided.
And a side elastic pad 8 for side pressure bearing, which is formed by bending into a substantially U-shape in a plane through the thin bent section 9, and The pad 8 has a lower end bent portion 10 such that a cross section orthogonal to the longitudinal direction has a substantially L-shape, and the lower end bent portion 10 is inserted into the lower surface of the sleeper 7. And

The reinforcing canvas 1 extends over the bent portion 10 at the lower end and the rising portion 11 of the side elastic pad 8 for supporting the side pressure.
2 may be buried in a substantially L-shaped cross section.

The side pressure bearing side elastic pad 8 is formed of a composite material in which the lower bent portion 10 and the rising outer layer 11a are made of hard rubber, and the rising inner layer 11b is made of soft rubber. The outer surface of the outer end plate 3 may be finished to a mirror surface.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 to 22 show an embodiment of the present invention. In FIGS. 1 and 2, both ends of a concrete sleeper 7 are supported by an elastic bearing box 5 embedded in gravel or a concrete floor. Have been. The elastic bearing box 5 is made of a highly rigid material such as FRP or a reinforced plastic made of FRP and glass fiber, or PP and glass fiber,
It consists of iron, castings, etc. The shape of the elastic bearing box 5 is as follows.
As shown in FIGS. 3 and 4, the bottom plate 1 has a substantially rectangular shape when viewed from a plane, and has a bottom shape in cross section so that the thickness of the lower surface of the intermediate portion becomes gradually thicker than both sides, and an end of the bottom plate 1 It is composed of both side plates 2 and an outer end plate 3 rising from the edge, and the upper and inner end sides are open.

Further, on the upper surface of the bottom plate 1 of the elastic bearing box 5,
A plurality of positioning projections 13, 13,... Arranged at predetermined intervals and in a predetermined arrangement are provided. In the case of the illustrated example, a load-bearing elastic pad 6 is provided between the center and inner end positioning protrusions 13, 13,..., And two rows of positioning pads are provided at intervals near the outer end. An auxiliary elastic pad 16 is provided between the projections 13, 13,.

As described above, the plurality of positioning projections 13,
The upper surface of the bottom plate 1 is partitioned by 13,... So that the elastic pad 6 and the auxiliary elastic pad 16 can be easily positioned without moving on the upper surface of the bottom plate 1. Therefore, the number of the positioning projections 13, 13,... Is increased or decreased, the arrangement position is changed, or the positioning plate 13 is not provided.
An elastic pad (not shown) having a size extending over the entire area can be provided. Since the elastic pad 6 and the auxiliary elastic pad 16 can exert a vibration absorbing function by being compressed and deformed, around the elastic pads 6 and 16,
A space that allows deformation of the elastic pads 6 and 16 is required. In this regard, since an appropriate space (a) is formed between the elastic pad 6 and the auxiliary elastic pad 16 as in the embodiment, each elastic pad can be smoothly compressed and deformed when receiving a load from above. .

The elasticity of the elastic pad can be arbitrarily adjusted by changing the material and shape of the elastic pad itself.

FIGS. 5 to 8 show a first specific example of an elastic pad configured to provide greater elasticity.
The elastic pad 6 is formed of a soft rubber 17, a plurality of horizontal holes 20 are formed in the inside thereof in parallel with each other, and projections 21 are formed on the upper and lower surfaces in a lattice shape.

In the elastic pad 6, the combination of the soft rubber 17, the lateral hole 20, and the lattice-shaped ridges 21 on the upper and lower surfaces allows the load from above to be smoothly received, and the vibration thereof to be efficiently absorbed.

FIGS. 10 to 12 show a second specific example of the elastic pad. The elastic pad 6a is entirely formed of a general soft rubber, and has ridges 21 formed on the upper and lower surfaces thereof in a lattice shape. Also in the elastic pad 6a, the combination of the soft rubber and the upper and lower grid-like ridges 21 allows the vibration of the elastic pad 6a to be efficiently absorbed by receiving a predetermined load from above.

Next, as shown in FIG. 2, FIG. 3 and FIG. 5, the both side surfaces and the outer end surfaces of the both ends of the concrete sleeper 7 and the side plates 2 and the outer end plate 3 of the elastic bearing box 5 are connected. A substantially U-shaped side pressure bearing side elastic pad 8 is mounted in the gap as viewed from above.

Before the side elastic pad 8 is mounted on the elastic bearing box 5, the side elastic pad 8 is provided with a band provided with two thin bent portions 9 at a predetermined interval as shown in FIGS. This band-shaped member can be formed in a substantially U-shape as viewed from the plane via the thin bent portion 9, and when folded in this way, the space between each thin bent portion 9 and both end edges 8 c is formed on both sides. 8a, and the space between the two thinly bent portions 9 is the outer end 8b. A plurality of recesses 4 are formed on the inner surface of the outer end portion 8b by a lattice-like protrusion, so that the elasticity of the outer end portion 8b is improved so as to more efficiently absorb the longitudinal vibration of the sleeper 7. Has been increased.

As shown in FIGS. 19 and 20, a lower end bent portion 10 is formed at a lower end of a rising portion 11 and partially inwardly at a right angle to the side portion 8a and the outer end portion 8b of the side elastic pad 8. Are formed. This lower bent portion 10
Is substantially L-shaped, and the cross-sectional shape of the portion where the lower end bent portion 10 is not formed is a substantially square shape.

The inner surface of the rising portion 11 following the lower bent portion 10 of the side elastic pad 8 is formed in accordance with the side surface and the outer end surface of the sleeper 7. In other words, when the side surface and the outer end surface of the sleeper 7 are vertical, as shown in FIG. 19, the inner surface of the rising portion 11 is a vertical surface, and when the side surface of the sleeper 7 is upwardly inclined, As shown in FIG. 20, it is preferable that the upper surface of the rising portion 11 be an inclined surface that is inclined inward.

The side elastic pad 8 is made of a combination of soft rubber and hard rubber, and at the portion where the lower end bent portion 10 is provided, as shown in FIGS. The outer layer 11a is formed of hard rubber, and the rising inner layer 11b is formed of soft rubber. Accordingly, the lower bent portion 10 and the rising portion outer layer 11a can firmly hold the L-shaped cross section by the hard rubber, and the right-angle bent portion does not expand. When the lower bent portion 10 is inserted into the lower surface of the sleeper 7, Even if the sleeper 7 vibrates, the tightness of the sleeper 7 with the right lower edge is reliably maintained, and there is no problem that the side elastic pad 8 escapes from the elastic bearing box 5. In a portion where the lower end bent portion 10 is not formed, the rising portion outer layer 11a is formed of hard rubber, and the rising portion inner layer 11b is formed of soft rubber. Therefore, the transverse vibration of the sleeper 7 can be received by the soft rubber of the rising portion inner layer 11b.

Further, in the portion where the lower end bent portion 10 is formed, the inside of the thickness of the side elastic pad 8 is shown in FIG.
As shown in FIG. 21, a reinforcing canvas 12 is embedded in a substantially L-shaped cross section over the lower end bent portion 10 and the rising portion 11. As shown in FIG. By providing the reinforcing canvas 12, even if a repeated load is applied in the direction in which the lower bent portion 10 and the rising portion 11 expand around the L-shaped bent portion due to the vibration repeatedly applied to the sleeper 7, the L-shaped shape is obtained. Cracks and the like do not occur in the bent portion, and the lower end bent portion 10 and the rising portion 1
There is no problem such as breakage of 1 from breakage.

Further, the rising portion 11 of the side elastic pad 8
The outer surface of the elastic bearing box 5 is mirror-finished and smooth, thereby reducing the frictional resistance between the inner surfaces of the two side plates 2 of the elastic bearing box 5 and the rising portion 11 so that the side elastic pads 8 are attached to the elastic bearing box 5.
It is configured to be able to vibrate smoothly inside. The mirror-like finish of the outer surface of the rising portion of the side elastic pad 8 can be formed by smoothly polishing the molding surface of the molding die. The sponge 40 is filled under the side elastic pad 8.

In the embodiment of the present invention, the elastic bearing box 5 is provided with a load bearing elastic pad 6, an auxiliary pad 16, and a side pressure bearing side elastic pad 8 in advance. Is accommodated in this elastic bearing box 5, and the sleeper 7 and the elastic bearing box 5 are temporarily held integrally using a band for temporary fixing (not shown), and are carried to the installation place. A projection 19 is provided on the outer side of both side plates 2, and when the elastic bearing box 5 is installed on a concrete roadbed, the projection 19 is buried in the concrete, so that the elastic bearing box 5 is formed. It is configured so that it does not separate from the concrete track floor.

[0029]

According to the sleeper elastic bearing device according to the present invention, the side elastic pad 8 for lateral pressure bearing is formed by inserting the lower bent portion 10 into the lower surface of the sleeper 7.
The weight of the sleeper 7 is pressed into the elastic bearing box 5 by its own weight so that it can be fixed easily and securely, and can be fixed easily and securely without using a complicated fixing means. The pad 8 does not escape from the elastic bearing box 5.

Further, since the reinforcing canvas 12 is buried between the lower end bent portion 10 and the rising portion 11 in the thickness inside the side elastic pad 8, the lower end bent portion 10 and the rising portion are repeatedly oscillated. It is possible to eliminate the problem that the wire 11 is disconnected. Further, when the lower bent portion 10 and the rising portion outer layer 11a are formed of hard rubber, the side elastic pad 8 can more reliably hold the L-shaped cross section, and the elastic support of the side elastic pad 8 can be used. Floating from the box 5 can be reliably prevented. Further, the outer surface of the side elastic pad 8 is mirror-finished, so that the frictional resistance between the both side plates 2 and the inner surface of the outer end plate 3 in the elastic bearing box 5 can be reduced. , Sleepers 7
Up and down movement of the side elastic pad 8 accompanying the vibration of.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which an elastic bearing device according to an embodiment of the present invention is attached to a sleeper.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view of an elastic bearing box.

FIG. 4 is a plan view of the elastic bearing box with the elastic pad of FIG. 3 removed.

FIG. 5 is a sectional view taken along line AA of FIG. 3;

FIG. 6 is a sectional view taken along line BB of FIG. 3;

FIG. 7 is a plan view of the elastic pad as the first specific example shown in FIG. 3;

FIG. 8 is a sectional view taken along line CC of FIG. 7;

FIG. 9 is a sectional view taken along line DD of FIG. 7;

FIG. 10 is a plan view of a second specific example of the elastic pad.

FIG. 11 is a sectional view taken along line EE of FIG. 10;

FIG. 12 is a sectional view taken along line FF of FIG. 10;

FIG. 13 is an enlarged sectional view showing an engagement structure between a sleeper and a side elastic pad for side pressure support.

FIG. 14 is a plan view showing a state where a side elastic pad is extended in a belt shape.

FIG. 15 is an enlarged partial plan view showing a state where a side elastic pad is bent in a U-shape.

FIG. 16 is an inner side view in a state where the side elastic pads are extended in a belt shape.

FIG. 17 is a partially enlarged view of an intermediate portion of the side elastic pad of FIG. 6;

FIG. 18 is an outer side view showing a state where the side elastic pads are extended in a belt shape.

19 is a sectional view taken along line GG of FIG.

FIG. 20 is a cross-sectional view of the side elastic pad according to an embodiment different from that of FIG. 19 taken along the line GG of FIG. 14;

FIG. 21 is a sectional view taken along line HH of FIG. 14;

FIG. 22 is a partially sectional side view of a conventional sleeper elastic bearing device.

FIG. 23 is an enlarged sectional view showing a conventional structure for fixing a side elastic pad to an elastic bearing box.

24 is a partially broken plan view of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 bottom plate 2 both side plates 3 outer end plate 4 concave portion 5 elastic bearing box 6 elastic pad for load bearing 7 sleeper 8 side elastic pad for side pressure bearing 9 thin bent portion 10 lower bent portion 11 rising portion 11a rising outer layer 11b rising Inner part layer 12 Reinforcement canvas 13 Positioning protrusion 14 Embedding plug 15 Female screw 16 Auxiliary elastic pad 17 Soft rubber 18 Fixing bolt 19 Projection piece 20 Side hole 21 Lattice ridge 24 Reinforcement plate 25 Elastic bearing box 26 Side elasticity for side pressure bearing Pad 27 Bolt insertion hole 28 Concrete slab 29 Concrete roadbed 30 Rail 31 Vibration-proof elastic bearing unit 32 Fixing device 33 Central roadbed drainage gutter 35 Bottom plate 36 Side plate 37 Outer end plate 38 Bottom elastic pad for load bearing 40 Sponge

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroaki Hayashi 2-4-2-4 Shibata, Kita-ku, Osaka City Inside West Japan Railway Company (72) Inventor Soichiro Shimizu 2-7-5 Higashi-Shimbashi, Minato-ku, Tokyo (72) Inventor Nobuhiro Taka 3-4-D509, Higashiizumioka, Toyonaka-shi, Osaka (72) Inventor Hideo Mitamura 1-70-5, Wada, Suginami-ku, Tokyo (56) References JP-A-54-51105 (JP, A) JP-A-61-21202 (JP, A) JP-A-1-136501 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E01B 1/00 E01B 3/00 E01B 3/46 E01B 19/00

Claims (3)

(57) [Claims] An elastic bearing box (5) having a bottom plate (1), both side plates (2) rising from a side edge of the bottom plate (1), and an outer end plate (3) rising from an outer edge of the bottom plate (1) is mounted on the bottom plate (1). The sleeper 7 is supported by the placed load-bearing elastic pads 6, and two between the both side surfaces and the outer end surface of the sleeper 7 and the two side plates 2 and the outer end plate 3 of the elastic bearing box 5. A side elastic pad 8 for side pressure bearing, which has a thin bent portion 9 and is formed by bending the thin bent portion 9 into a substantially U-shaped plane.
The side elastic pad 8 has a lower bent portion 10 such that the cross section orthogonal to the longitudinal direction is substantially L-shaped.
And the lower end bent portion 10 is inserted into the lower surface of the sleeper 7. 2. An elastic bearing for a sleeper according to claim 1, wherein a reinforcing canvas 12 is buried in a substantially L-shaped cross section over the lower bent portion 10 and the rising portion 11 of the side pressure bearing side elastic pad 8. apparatus. 3. The side pressure bearing side elastic pad 8 has a lower bent portion 10 and a rising outer layer 11a made of hard rubber.
The sleeper elastic bearing device according to claim 1 or 2, wherein the rising portion inner layer (11b) is formed of a composite material made of soft rubber, and the outer surface of the rising portion (11) is mirror-finished and smoothed.