JP2859188B2 - Sleeper elastic bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic support for a PC sleeper laid on a gravel roadbed of a railway.

[0002]

2. Description of the Related Art PC sleepers laid on a gravel roadbed are:
While making the elastic support on the gravel roadbed of the sleeper effective (reducing the spring constant), the crushed stone ballast constituting the gravel roadbed is beaten on the lower surface of the PC sleeper to be fine-grained (the rigidity of the roadbed increases elasticity). PC)
In order to extend the maintenance cycle of the sleeper, the sleeper is often supported by an elastic bearing device using an elastic bearing pad.

FIG. 13 shows an example of a conventional elastic bearing pad.
The elastic bearing pad 13 shown in FIG. 14 and the elastic bearing pads 14 shown in FIGS.
5, both side upright portions 16, and outer end upright portions 17, which are integrally formed of soft rubber, and the ends of the PC sleeper 1 are fitted to the elastic bearing pads 13, 14 from above, The lower surface of the PC sleeper 1 and the elastic bearing pad 13,
14 and the bottom 15 are fixed with an adhesive. The difference between the elastic bearing pads 13 of FIGS. 13 and 14 and the elastic bearing pads 14 of FIGS. 15 and 16 is that, in the former, the upper ends of the both-side standing portions 16 are stepped outward from both side surfaces of the PC sleeper 1. In the latter, PC sleepers 1
The lower side is recessed stepwise from the middle part on both sides of the elastic support pad 14, and the upright portions 16 on both sides of the elastic bearing pad 14 are
Therefore, the pillow does not protrude outward from both side surfaces of the PC sleeper 1 and, therefore, when the clogged gravel is pushed back to the lower surface of the sleeper using the tamping device, the tamping claws abut the both-side standing portions 16. That is not configured.

[0004]

These conventional elastic bearing pads have the following disadvantages. Since the elastic bearing pad (soft rubber) is bonded to the lower surface of the PC sleeper, this elastic bearing pad is
The peeled portion which is easy to peel off from the sleeper and does not receive the backup of the PC sleeper expands and contracts in the horizontal direction, so that the elastic bearing pad is damaged more quickly (a defect caused by a weak adhesive force between concrete and rubber). When lateral pressure is applied to the rails from the train wheels, the force that pushes the PC sleepers to the side acts and the elastic pad is sheared (especially in curved sections, the lateral pressure from the wheels increases).
Therefore, the street of the rail is not stabilized, and a dancing phenomenon (wheel swaying left and right) occurs, and the safety of the railroad is reduced. When the shear deformation of the elastic bearing pad due to (1) and (2) is repeated, the rail protrudes (the radius of the curve increases) at the curved portion, which impairs safety. Also, in order to eliminate this overhang, it is necessary to restrain the side and end faces of the PC sleeper with crushed ballast.
First, the restraining force of the crushed stone ballast cannot be maintained unless the shear deformation of the elastic bearing pad is restrained (that is, the crushed stone ballast loosened when subjected to shear deformation). Cannot be expected. In addition, in order to recover the elastic bearing function of the gravel roadbed, when the ballast that escaped to the side using a tamping device is pushed back to the lower side of the PC sleeper, the tip of the vibrating claw of the tamping device is made of soft rubber. There is a drawback that the pad hits the pad and breaks it. An object of the present invention is to provide a sleeper elastic support that solves the above-mentioned problems.

[0005]

In order to achieve the above-mentioned object, the elastic support of the sleeper according to the present invention is provided with a width that does not protrude from both side surfaces of the end of the PC sleeper,
And a protective plate 4 having an upper surface having a fixing surface 3 to the lower surface 2 of the PC sleeper 1, an elastic pad 5 fixed to the lower surface of the protective plate 4 so as not to protrude from an edge of the protective plate 4. Is characterized by the following. It is preferable to protrude the lateral pressure-resistant plate 6 that bites into the gravel roadbed on one or both sides and / or the outer end of the protective plate 4. An insole pad 7 that is in contact with the lower surface of the PC sleeper 1 may be attached to the fixing surface 3 of the protection plate 4. The protection plate 4 may be made of steel, casting, or reinforced plastic. In addition, the elastic support of the sleeper according to the present invention has a bolt insertion hole 8 formed in the protection plate 4 having the anti-lateral pressure plate 6 biting into the gravel, and the bolt insertion hole 8 and the upper and lower surfaces of the protection plate 4 are provided. The mounting bolts 11 are inserted into the bolt insertion holes 9 and 10 formed in the insole pad 7 and the elastic pad 5 which are fixed so as not to protrude from the edge of the protection plate 4, respectively.
It is characterized in that the mounting bolt 11 is provided so as to be screwed into the female screw of the insert 12 embedded in the PC sleeper 1.

According to the present invention, the elastic pad 5 for supporting the PC sleeper 1 is integrally fixed to the protection plate 4, so that the risk of being damaged by being protected by the protection plate 4 is reduced, and the protection plate is reduced. Since the 4 can be securely fixed to the lower surface of the PC sleeper 1, the elastic pad 5 can be securely fixed to the PC sleeper 1. Furthermore, since the lateral pressure-resistant plate 6 of the protective plate 4 bites into the gravel, the support of the PC sleeper 1 on the gravel roadbed is stabilized via the protective plate 4, particularly at the curved portion of the rail, and the elastic pad 5 is sheared. Is less likely to act.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 12, a PC sleeper 1 having a rail 27 fixed to an upper surface by a fastener 26 is a gravel roadbed 2.
0, and both ends of the PC sleeper 1 are supported by elastic bearings 21 disposed on a gravel roadbed 20. The high-rigidity material (hereinafter referred to as a protection plate) 4 of the elastic bearing 21 is made of, for example, iron, a casting, or a reinforced plastic made of FRP and glass fiber or PP and glass fiber. As shown in FIG. 8, it is a substantially rectangular flat plate when viewed from the top, and the upper surface is P
A fixing surface 3 for the lower surface 2 of the C sleeper 1;
Further, a plurality of bolt insertion holes 8 are formed in the flat plate portion.

The width of the flat portion of the protection plate 4 is set to PC
The width of the sleeper 1 is substantially the same as that of the sleeper 1, and both side edges 4 a of the protection plate 4 are provided so as not to travel from both sides 1 a of the PC sleeper 1.

Further, a locking projection 22 having a predetermined height is provided upright from an outer edge of the protection plate 4.
When the C sleeper 1 is placed, the sleeper end surface 1b is provided so as to engage with the locking projection 22 to restrict the movement of the sleeper in the end direction.

Further, from the outer end and both sides of the protection plate 4,
A lateral pressure-resistant plate 6 that can bite into the gravel on the gravel roadbed protrudes downward. A substantially triangular plate-shaped reinforcing rib 6 a is integrally provided inside the lateral pressure plate 6, and the base end of the reinforcing rib 6 a is fixed to the back surface of the protection plate 4.

An elastic pad 5 is fixed to the lower surface of the protection plate 4 to elastically support the protection plate 4 on a gravel roadbed 20. The elastic pad 5 is made of a soft synthetic rubber, and is made of a flat body having a predetermined thickness.
The dimensions are the same as the size of the protection plate 4 and are set so as not to travel from the edge when fixed to the lower surface of the protection plate 4. As shown in FIGS. 9 and 10, the elastic pad 5 has a concave notch 2 in order to avoid the lateral pressure-resistant plate 6 located on both sides and the outer end of the protective plate 4 and its reinforcing rib 6a.
3 and a slope 24 at the bottom thereof.

The means for fixing the elastic pad 5 to the lower surface of the protective plate 4 may be either firmly fixed by bonding or integrated by baking. In the former case, that is, when the adhesive force of rubber to iron is much stronger than the adhesive force of rubber to concrete, the adhesion of the elastic pad 5 to the protective plate 4 is very strong.

The fixing surface 3 on the upper surface of the protective plate 4 may be directly fixed to the lower surface of the PC sleeper 1 with an adhesive or the like, but in the present invention, the insole pad 7 is attached to the fixing surface 3 with an adhesive or It is fixed by baking, and the protection plate 4 is
The C sleeper 1 is provided so that it can be fitted to the lower surface and smoothly fixed.

In this case, the insole pad 7 is connected to the PC sleeper 1
May be fixed to the lower surface using an adhesive. However, since the adhesive strength is weak, the mounting bolt 11 is used in the embodiment of the present invention. That is, the insole pad 7 fixed to the upper surface of the protection plate 4 and the elastic pad 5 fixed to the lower surface of the protection plate 4 are respectively provided with bolt insertion holes 9 at positions matching the bolt insertion holes 8 formed in the protection plate 4. , 10 are opened, and a plurality of inserts (embedding plugs) 12 having internal threads are embedded in the PC sleeper 1 correspondingly, and each of the bolt insertion holes 8, 9, 10 is inserted. By screwing the mounting bolt 11 into the female screw of the insert 12, the insole pad 7 is provided between the protection plate 4 and the lower surface 1a of the sleeper.
And the protective plate 4 is firmly fixed to the PC sleeper 1 via the insole pad 7.

As shown in FIG. 5, the bolt insertion hole 10 formed in the elastic pad 5 is made larger than the diameter of the head of the mounting bolt 11, and
Is screwed into the insert 12, and the bolt head is buried in the bolt insertion hole 10 so as to be filled with a waterproof material 25 made of a cold-setting paste resin.

[0016]

As described above, the present invention has the following effects. The elastic support 21 having the elastic pad 5 fixed to the lower surface of the protection plate 4 is used when the PC sleeper 1 is supported.
The role of reducing the spring constant of the track by compressively deforming the elastic pad 5 in the vertical direction under which the train load is applied, and preventing the crushed ballast on the gravel roadbed from being pressed by the lower surface of the elastic pad (soft rubber) to prevent its fine granulation, It has the effect of prolonging the vibration absorption function of the gravel roadbed. The elastic pad 5 is integrally and firmly fixed to the protection plate 4, and the protection plate 4 is firmly fixed to the lower surface of the PC sleeper 1. Can be fixed to sleeper 1, PC sleeper 1
The elastic pad 5 does not peel off from the protective plate 4 due to the repeated load applied to it, and the elastic pad itself cannot be expanded and contracted in the horizontal direction due to the strong surface adhesion between the elastic pad 5 and the protective plate 4, so that the elastic pad 5 is damaged even if used for many years. do not do. Also, the elastic pad 5
Is not traveling from the edge of the protection plate 4, so that the elastic pad 5 is not damaged by the tamping claw when the gravel is pushed back by the tamping device. When the protection plate 4 with the elastic pad 5 and the lateral pressure plate 6 is fixed to the PC sleeper 1 via the insole pad 7 and the mounting bolt 11, the lateral pressure plate 6 bites into the gravel roadbed 20. As a result, the lateral pressure resistance area of the protection plate 4 with respect to the gravel roadbed is widened, whereby the shearing deformation of the elastic pad 5 is suppressed, the PC sleeper 1 does not run out, the rails run out of shape, and the rails protrude at curved sections. Has the effect of preventing. The PC sleeper 1 with the added weight of the protection plate 4 and the lateral pressure-resistant plate 6 (by composing them with a heavy material such as a steel material) has an increased speed to stabilize the rail frame by its weight. This has the effect of enabling train operation (especially, the higher the weight of a sleeper on a high-speed track using long rails, the more effective it is).

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a state in which an elastic bearing according to the present invention is attached to a PC sleeper.

FIG. 2 is an enlarged cross-sectional view of the right end of the PC sleeper in FIG.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is an enlarged view of a portion A in FIG. 2;

FIG. 6 is a bottom view of the protection plate of the elastic bearing.

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

FIG. 8 is a right side view of FIG.

FIG. 9 is a plan view of an elastic pad.

FIG. 10 is a sectional view taken along line CC of FIG. 9;

FIG. 11 is a plan view of an insole pad.

FIG. 12 is a sectional view taken along line DD of FIG. 11;

FIG. 13 is a cross-sectional view showing a first conventional example of a sleeper elastic bearing structure.

FIG. 14 is a side view of FIG.

FIG. 15 is a sectional view showing a second conventional example of the sleeper elastic bearing structure.

FIG. 16 is a side view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 PC sleeper 2 Lower surface 3 Fixing surface 4 Protective plate 5 Elastic pad 6 Lateral pressure-resistant plate 6a Reinforcement rib 7 Insole pad 8 Bolt insertion hole 9 Bolt insertion hole 10 Bolt insertion hole 11 Mounting bolt 12 Insert 13 Elastic bearing pad 14 Elastic Bearing pad 15 Bottom part 16 Both-side standing part 17 Outer-end standing part 18 Depression part 20 Gravel bed 21 Elastic bearing 22 Retaining projection 23 Concave notch 24 Slope 25 Waterproof material 26 Fastener 27 Rail

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) E01B 3/00 E01B 3/28-3/42 E01B 3/46 E01B 1/00 E01B 19/00

Claims (5)

(57) [Claims] 1. A protection plate 4 having a width that does not protrude from both side surfaces of the end of the PC sleeper 1 and having on its upper surface a fixing surface 3 to the lower surface 2 of the PC sleeper 1; So that it does not protrude from the edge of
And an elastic pad 5 fixed to the lower surface of the sleeper. 2. The sleeper according to claim 1, wherein a lateral pressure-resistant plate that bites into a gravel roadbed is protrudingly provided on both sides and / or the outer end of the protection plate. Elastic bearing. 3. The fixing surface 3 of the protection plate 4 has a PC
The sleeper elastic bearing according to claim 1 or 2, wherein an insole pad (7) is attached to the lower surface (2) of the sleeper (1). 4. The sleeper elastic bearing according to claim 1, wherein the protection plate 4 is made of any one of steel, casting, and reinforced plastic. 5. A bolt insertion hole 8 is formed in a protection plate 4 having a lateral pressure-resistant plate 6 projecting downward so as to bite into the gravel, and the bolt insertion hole 8 and the upper and lower surfaces of the protection plate 4 are provided. The mounting bolts 11 are inserted into the bolt insertion holes 9 and 10 formed in the insole pad 7 and the elastic pad 5 which are fixed so as not to protrude from the edge of the protection plate 4. An elastic bearing for a sleeper, characterized in that it is provided so as to be screwed into an internal thread of an insert (12) embedded in a PC sleeper (1).