JP3068803B2 - Mounting structure and mounting method of elastic pad for concrete 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 mounting structure and a mounting method for an elastic pad for a concrete sleeper laid on a gravel roadbed of a railway.

[0002]

2. Description of the Related Art A railroad concrete sleeper laid on a gravel roadbed absorbs vibrations to which the sleeper is applied to some extent due to the elasticity of the gravel roadbed. Therefore, elastic bearing pads are attached to the concrete sleeper. In many cases, a new sleeper was recently used.However, in the case of a new sleeper, the efficiency of vibration absorption has been further improved, and the impact transmitted to the gravel roadbed has been further reduced. In order to prevent the settlement of the nail due to the generation of dust and dust and the collapse of the roadbed, and to extend the maintenance cycle, both ends of the sleeper are often supported by elastic bearing boxes containing elastic bearing pads.

Further, as a recent trend, even for existing concrete sleepers having no elastic bearing pad, a new elastic pad is newly attached to cushion the vibration to extend the durability of the sleeper and to improve the durability of the traveling vehicle. Reduction of vibration to improve riding comfort is being gradually rolled out nationwide.

[0004] A conventional general mounting structure for mounting an elastic pad on a concrete sleeper having no elastic pad is as shown in FIGS.
In each of the drawings, an anchor nut 4 having a split groove 3 is buried in a back surface 2 of a concrete sleeper 1 attached to a rail (not shown), and a wedge 5 is cast inside the anchor nut 4. As a result, the tip of the anchor having the split groove 3 is enlarged and tightly fixed in the concrete sleeper 1.

Next, the back surface 2 of the concrete sleeper 1
Has a plurality of buffer grooves 6 in the sleeper width direction on the lower surface,
Three rectangular elastic pads 7 are respectively provided at the middle and both ends of the sleeper. Fixing bolts 9 are inserted into a plurality of bolt holes 8 formed in each elastic pad 7, and the anchor nut 4 is inserted into the bolts 8. By screwing, the elastic pad 7 is fixed to the back surface 2 of the sleeper.

[0006]

When the elastic pad 7 of the above-mentioned mounting structure is mounted on an existing concrete sleeper 1 having no elastic pad, the concrete sleeper 1
After removing the gravel around the installation area to create a sufficient space around the sleeper, loosen the rail fixing bracket, remove the sleeper 1 from the rail, and invert the sleeper 1 at an appropriate work place Further, an elastic pad 7 is arranged on the back surface 2 and the fixing bolt 9 is fixed by screwing the fixing bolt 9 to the anchor nut 4, and then the sleeper 1 is again turned over and returned to the original setting site of the gravel roadbed, and fixed. Fasten the brackets, attach the rails, backfill the gravel and finish the work.

[0007] However, the conventional elastic pad mounting structure has a disadvantage that it takes a lot of work time and labor to mount the elastic pad on an existing concrete sleeper.

An object of the present invention is to provide a mounting structure and a mounting method for an elastic pad for a concrete sleeper which have solved the above-mentioned problems.

[0009]

According to the present invention, there is provided a structure for mounting an elastic pad for a concrete sleeper according to the present invention, comprising a hard rubber layer, a soft rubber layer mounted on both upper and lower surfaces or one of the two surfaces. An elastic pad made of a material is applied to the back surface of the concrete sleeper, and a side portion of the elastic pad is locked by a horizontal locking portion of a mounting hanger made of a hard material. Are fixed with a double-sided adhesive tape.

Further, the present invention is characterized in that, in addition to the mounting means for mounting the hanger to the concrete sleeper with the double-sided adhesive tape, a fixing anchor penetrates the upright portion of the mounting hanger and penetrates the concrete sleeper. And

According to the present invention, instead of the mounting means for mounting the hanger to the concrete sleeper with the double-sided adhesive tape, a fixing bolt is inserted into a bolt hole formed in an upright portion of the mounting hanger. It is characterized in that it is screwed into the thread of the insert buried in the concrete sleeper.

Further, the present invention provides the elastic pad,
Both side edges of the hard rubber layer and the upper and lower soft rubber layers are provided more inward than both lower edges of the concrete sleeper, and both sides of the hard rubber layer and the upper soft rubber layer are provided with the mounting hanger. A wing having a concave portion into which a step connecting portion connecting the horizontal locking portion and the upright portion is fitted is provided.

The method for mounting an elastic pad for a concrete sleeper according to the present invention is characterized in that a rail is supported, a gravel around an existing concrete sleeper buried in a gravel roadbed is removed, and a back surface of the concrete sleeper is provided. A hard rubber layer and an elastic pad made of a soft rubber layer mounted on both upper and lower surfaces or any one of the surfaces are applied, and the horizontal locking portion of a mounting hanger made of a hard material is used to attach a side portion of the elastic pad. The side surface of the upright portion of the mounting hanger is fixed to the side surface of the concrete sleeper with a double-sided adhesive tape.

[0014] In the above-mentioned method of mounting the elastic pad, the mounting hanger is mounted on the concrete sleeper with a double-sided adhesive tape, and further, the upright portion of the mounting hanger penetrates the concrete sleeper.

Further, according to the present invention, a fixing bolt is inserted into a bolt formed in an upright portion of the mounting hanger in place of the mounting means using the double-sided adhesive tape for mounting the mounting hanger on a concrete sleeper. It is screwed into the thread of the insert buried in the concrete sleeper.

According to the present invention, when attaching an elastic pad to an existing concrete sleeper buried in a gravel roadbed, the gravel around the sleeper is removed to provide a gap, and this gap is used to provide a back surface for the sleeper. By attaching the elastic pad and attaching the mounting hanger that locks the elastic pad to the concrete sleeper via the double-sided adhesive tape or the double-sided adhesive tape and the fixing anchor, to the concrete sleeper of the elastic pad Since the installation work is completed, the concrete sleeper is removed from the rail and turned over as before, and the elastic pad is fixed to the bolt on the back of the sleeper, and then the sleeper is returned to the gravel roadbed and attached to the rail again. No complicated work is required.

When an elastic pad is attached to a newly installed concrete sleeper, an elastic pad is attached to the back surface of the sleeper at an arbitrary work place before the sleeper is buried on a gravel roadbed. The locking mounting hanger can be fixed to the sleeper via fixing bolts screwed into the side of the sleeper. With this mounting structure, when replacing the elastic pad a few years after embedding the sleeper with the elastic pad on the gravel roadbed, remove the gravel around the sleeper and provide a gap, and Detach the fixing bolts to be screwed into the inserts and quickly replace them with a simple replacement work.The troublesome and time-consuming work of removing the concrete sleepers from the rails, turning them over and mounting the elastic pads is unnecessary. is there.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 show an example of a mounting structure for mounting an elastic pad 14 on an existing concrete sleeper as a first embodiment. In each figure, the sleepers are laid on a gravel roadbed 12 and are made of concrete sleepers 1.
Elastic pads 14 are attached to the back surface 15 of both ends (only one end is shown in FIG. 2) of the 3, and both ends are buried in the gravel roadbed 12. The elastic pad 14 has a hardness of, for example, 8
A hard rubber layer 14a made of a material in the range of 0 to 95, an upper soft rubber layer 14b mounted on the upper surface thereof, and a lower soft rubber layer mounted on the lower surface thereof (each having a low hardness of 55 to 55)
70 normal rubbers) 14c. The upper soft rubber layer 14b functions as a conforming layer with the back surface 15 of the concrete sleeper 13 which is a rough surface, and the presence of the upper soft rubber layer 14b as the conforming layer allows the hard rubber layer 14a to be converted into concrete. Sleeper 13
Can be more smoothly contacted than directly contacting the back surface 15.

The upper surface of the upper soft rubber layer 14b is flat (shown in FIG. 4), while the lower surface of the lower soft rubber layer 14c is provided on the lower surface of the lattice-like frame 16 to more reliably engage with the gravel. Further, a plurality of recesses 17 formed by the lattice frame 16 are formed.

The elastic pad 14 is provided in a rectangular shape so as to be similar to the shape of the back surface 15 in a predetermined range of the end of the concrete sleeper 13, and is formed of a hard rubber layer 14a and an upper soft rubber layer 14b. On both side edges 18, wing portions 20 each having two concave portions 19 are provided.

As shown in FIG. 3, the hard rubber layer 14a
The both side edges 18 of the upper soft rubber layer 14b are
In order to prevent the tamping bar of the tamping device from damaging the elastic pad 14 at the time of repairing, the tip edge 22 of the wing portion 20 shown in FIG. The concrete sleepers 13 are provided with dimensions substantially aligned with the lower edges 21 on both sides.
Further, both side edges 23 of the lower soft rubber layer 14c are provided more inward than both side edges 18 of the hard rubber layer 14a and the upper soft rubber layer 14b.

The elastic pad 14 is applied to the back surface 15 of the concrete sleeper 13 and is attached to the mounting hanger 2.
4 keeps the sleeper back surface 15 in close contact therewith. The mounting hanger 24 is formed of a hard material and has a vertical upright 2.
5 and the horizontal locking portion 26 are connected via a step-shaped connecting portion 27 to form a substantially L-shaped side surface as a whole.

The mounting hanger 24 is disposed on the four wings 20 of the elastic pad 14 and is provided with a width that fits into the recess 19 of the wing 20. That is, as shown in each figure, the step-like connecting portions 27 of the four mounting hangers 24 are fitted into the respective concave portions 19 of the four wing portions 20 of the elastic pad 14, and the horizontal locking portions 26 are It is engaged with the lower surface of the side edge portion 18 of the hard rubber layer 14a, and furthermore, the upright portion 25 and the vertical side surface 28 of the concrete sleeper 13 are integrally and firmly fixed via a double-sided adhesive tape 29. As a result, the elastic pad 14 is securely supported on the back surface 15 of the concrete sleeper 13 with a simple mounting structure via the mounting hanger 24.

The mounting structure of the elastic pad according to the first embodiment has the above-mentioned structure. Therefore, when the elastic pad 14 is mounted on the existing concrete sleeper 13, the gravel around the sleeper is removed to provide a gap, The elastic pad 14 is mounted on the back surface 15 of the sleeper using this gap, and the mounting hanger 24 for locking the elastic pad 14 is fixed to the vertical side surface 28 of the concrete sleeper 13 via the double-sided adhesive tape 29. Then, the work for attaching the elastic pad 14 to the concrete sleeper 13 is completed with the sleeper still attached to the rail 10 by backfilling the gravel in the gap. Note that a plurality of PC cables 34 are inserted into the concrete sleeper 13 in the longitudinal direction thereof in a tensioned manner, and the strength of the concrete sleeper is reinforced.

FIGS. 7 to 12 show, as a second embodiment, an example of a mounting structure for mounting the elastic pad 14 on an existing concrete sleeper. In the second embodiment, in addition to the attachment means for attaching the hanger 24 to the concrete sleeper 13 with the double-sided adhesive tape 29 of the first embodiment, a fixing anchor 35 is provided in the upright portion 25 of the attachment hanger 24. It penetrates 34a and penetrates and is fixed in the anchor fitting hole 37 drilled in the side surface of the concrete sleeper 13. The fixing anchor 35 is, for example, as shown in FIG.
1. As shown in FIG. 12, it is preferable to use a structure in which an expanding nail 35b is fitted into an anchor cylindrical body 35a having a split groove 36 at the tip, leaving a driving allowance. Then, drill holes 3 for anchors on the side of the concrete sleeper 13 with a drill.
7 and the fixing anchor 3 is inserted into the hole as shown in FIG.
5 is inserted, and the expanding nail 35b is driven in, as shown in FIG.
As shown in FIG. 2, the expanded distal end portion 35 of the anchor cylinder 35a
c is forcibly expanded so that the anchor 35 can be tightened into its penetrating hole 37. The fixing anchor 35
Is inserted into the concrete sleeper 13 by inserting one or more standing portions 25 of the mounting hanger 24. Other configurations in the second embodiment are the same as those in the first embodiment, and therefore, the same elements will be described with the same reference numerals. According to the second embodiment, since the fixing anchor 35 is used in addition to the double-sided adhesive tape 29, the fixing property of the mounting hanger 24 to the concrete sleeper 13 is further enhanced.

FIGS. 13 to 17 show a third embodiment.
An example of an attachment structure for attaching an elastic pad to a newly installed concrete sleeper is shown. In the third embodiment, the first and second
Unlike the embodiment, the elastic pad 14 is attached to the concrete sleeper 1 in a sleeper making stage before the concrete sleeper 13 is attached to the rail 10 and buried in the gravel roadbed 12.
The third embodiment is characterized in a structure for fixing the mounting hanger 24 to the concrete sleeper 13 in the case of disposing the mounting hanger 24 on the back surface 15, and this fixing structure is different from the first and second embodiments.

In the first embodiment, in view of the fact that it is not easy to embed a bolt screwing insert for fixing the mounting hanger 24 for supporting the elastic pad 14 to the existing concrete sleeper 13, it is not easy. Was used, and the double-sided adhesive tape 29 was used. In contrast,
In the third embodiment, the elastic pad 14 is fixed to the sleeper at the stage of forming the concrete sleeper 13 before it is buried in the gravel roadbed 12, so the bolt screwing insert for fixing the elastic pad 14 is fixed. If the steps 30 are carried out together with the molding of the concrete sleeper 13, there is no problem as described above.

Therefore, in the third embodiment, instead of the means for attaching the hanger 24 to the concrete sleeper 13 by the double-sided adhesive tape 29 shown in the first embodiment, when the concrete sleeper 13 is molded, Inserts 30 are buried in four places on the vertical side surface 28, while bolt holes 31 are formed in the upright portions 25 of the mounting hanger 24. Then, the fixing hanger 32 is inserted into the bolt hole 31 of the upright portion 25, and the fixing hanger 32 is screwed into a screw portion of the insert 30 embedded in the concrete sleeper 13, so that the mounting hanger 24 is connected to the concrete sleeper. The elastic pad 14 is fixed to the rear surface 15 of the concrete sleeper 13 via a mounting hanger 24.

In the third embodiment, the insert 30
A recess 33 is formed in the vertical side surface 28 of the concrete sleeper 13 surrounding the buried portion of the mounting hanger 2.
The bolts 32 for fixing the sleepers 4 to the sleepers do not travel from the vertical side surfaces 28 of the sleepers, and the side edges 18 of the elastic pad 14 are also closer to the inside than the lower edges 21 of the sleepers. Nothing goes outside from the side. Therefore, using a tamping device, the ballast in which the gap in the gravel roadbed 12 is clogged back is pushed back,
When the ballast that has escaped to the side of the sleeper is returned to the lower side of the sleeper, the tamping bar can work smoothly without damaging the fixing bolt 32 or the elastic pad 14. In the second embodiment, as shown in FIG. 10, the elastic pad 14 does not have a wing portion at the side edge portion 18, and a concave portion 19a is provided directly on the side edge portion 18 in the arrangement shown. The stepped connecting portion 27 of the mounting hanger 24 is provided so as to fit into the concave portion 19a.

The structure for mounting the elastic pad for concrete sleepers according to the third embodiment has the above-described structure.
At a predetermined work place, an elastic pad 14 is provided on the back surface 15 of the concrete sleeper 13, a fixing bolt 32 is screwed into the insert 30, and the mounting hanger 24 is fixed to the concrete sleeper 13. The work is completed by burying the elastic pad 14 in the gravel roadbed 12, and the elastic pad 14 can be quickly attached to the sleeper with a simple structure.

Further, when the sleeper with the elastic pad according to the third embodiment is buried in the gravel roadbed and several years have passed, when the elastic pad 14 is replaced, the gravel around the sleeper is removed and the gap is removed. In addition, the fixing bolt 32 to be screwed to the side of the sleeper can be attached and detached, and it can be quickly performed by a simple exchange work. The concrete sleeper is removed from the rail as in the conventional case, and the elastic sleeper is turned over and the elastic pad is attached. The troublesome and time-consuming work that is required is unnecessary.

[0032]

As described above, according to the present invention,
When attaching an elastic pad to an existing concrete sleeper, remove the gravel around the sleeper and provide a gap, and place an elastic pad on the back of the concrete sleeper on which the rail is attached through this gap, and attach it. The elastic pad is fixed to the concrete sleeper by locking the elastic pad with a hanger and through a double-sided adhesive tape or through an anchor for fixing the double-sided adhesive tape, thereby connecting the elastic pad to the back of the concrete sleeper. , Which eliminates the need for the laborious and troublesome installation work of attaching and detaching the elastic sleeper by attaching and detaching the concrete sleepers from the rails as in the past, and quickly and quickly by a small number of workers. Therefore, there is an effect that the cost required for attaching the elastic pad can be reduced.

In the structure for attaching the elastic pad of the present invention to a newly installed concrete sleeper, the elastic pad is disposed on the back surface of the concrete sleeper, and is locked by a mounting hanger. Since the elastic pad can be held on the concrete sleeper by screwing the fixing bolt to the insert embedded in the sleeper, the mounting structure is simpler than the conventional elastic pad mounting structure of this kind, and When replacing the elastic pad, remove the gravel around the concrete sleeper to create a gap, remove the fixing bolt from the insert on the side of the sleeper, and easily replace the elastic pad by removing the mounting hanger from the sleeper Can be
Also in this case, pad replacement can be performed while the concrete sleeper is attached to the rail, so that the replacement can be performed more quickly and easily than before, and the cost required for the replacement can be reduced. effective.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG. 2, showing a mounting structure of a concrete sleeper elastic pad according to a first embodiment.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4A is a plan view of the elastic pad shown in FIG. 1,
(B) is a front view of the elastic pad.

FIG. 5A is a bottom view of the elastic pad shown in FIG. 1,
FIG. 5B is a cross-sectional view taken along the line BB of FIG. 4, and FIG.
FIG. 4 is a detailed cross-sectional view of FIG.

FIGS. 6A, 6B, and 6C are a plan view, a front view, and a side view of a mounting hanger.

FIG. 7 is a sectional view taken along the line DD in FIG. 8 showing a mounting structure of the elastic pad for concrete sleepers according to the second embodiment.

FIG. 8 is a side view of FIG. 7;

FIG. 9 is an enlarged view of a main part of FIG. 7;

10A is a plan view of a mounting hanger, FIG. 10B is a front view of the mounting hanger, and FIG. 10C is a side view.

FIG. 11 is a front view of the fixing anchor when it is not expanded.

FIG. 12 is a front view when the fixing anchor is expanded.

FIG. 13 is a cross-sectional view taken along the line EE of FIG. 14 showing a mounting structure of the elastic pad for concrete sleepers according to the third embodiment.

FIG. 14 is a side view of FIG.

FIG. 15 is an enlarged view of a main part of FIG.

FIG. 16A is a plan view of the elastic pad shown in FIG. 13;
(B) is a front view of the elastic pad.

17A is a bottom view of the elastic pad, FIG. 17B is a sectional view taken along line FF of FIG. 16, and FIG. 17C is a line GG of FIG. 17A.
It is a detailed sectional view.

18A is an explanatory front view showing a mounting structure of an elastic pad for a concrete sleeper according to a conventional example, FIG. 18B is a side view of FIG. 18A, and FIG. (A)
FIG.

FIG. 19 is an enlarged cross-sectional view of the insert section in FIG.

FIGS. 20A and 20B are a bottom view and a side view of an end elastic pad.

21 (A) and (B) are a bottom view and a side view of an intermediate portion elastic pad.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete sleeper 2 Back surface 3 Split groove 4 Anchor nut 5 Wedge 6 Buffer groove 7 Elastic pad 8 Bolt hole 9 Fixing bolt 10 Rail 11 Fixing bracket 12 Gravel roadbed 13 Concrete sleeper 14 Elastic pad 14a Hard rubber layer 14b Upper soft rubber Layer 14c Lower soft rubber layer 15 Back surface 16 Lattice frame 17 Depression 18 Side edges 19 Depression 20 Wings 21 Sleeper lower edges 22 Front edge 23 Side edges 24 Mounting hanger 25 Upright portion 26 Horizontal locking portion 27 Step-like connection 27 Part 28 Vertical side surface 29 Double-sided adhesive tape 30 Insert 31 Bolt hole 32 Fixing bolt 33 Sleeper recess 34 Hole 35 Fixing anchor 36 Split groove 37 Anchor insertion hole

Claims (7)

(57) [Claims] 1. An elastic pad comprising a hard rubber layer and a soft rubber layer attached to both upper and lower surfaces or one of the two surfaces is applied to the back surface of a concrete sleeper, and a mounting hanger made of a hard material is attached to a wing of the elastic pad. And a side portion of the elastic pad is locked by a horizontal locking portion of the mounting hanger, and a side surface of the upright portion of the mounting hanger and a side surface of the concrete sleeper are fixed with double-sided adhesive tape. Mounting structure of elastic pad for concrete sleepers. 2. An elastic pad comprising a hard rubber layer and a soft rubber layer mounted on both upper and lower surfaces or one of the two surfaces is applied to the back surface of a concrete sleeper, and a mounting hanger made of a hard material is attached to a wing of the elastic pad. And the horizontal portion of the mounting hanger locks the side portion of the elastic pad, and the upright side of the mounting hanger and the side of the concrete sleeper are fixed with double-sided adhesive tape. A mounting structure for an elastic pad for a concrete sleeper, wherein a fixing anchor penetrates the concrete sleeper by penetrating an upright portion of a hanger. 3. An elastic pad comprising a hard rubber layer and a soft rubber layer attached to both upper and lower surfaces or one of the upper surface and the lower surface is applied to the back surface of the concrete sleeper. The side portion of the elastic pad is locked, a fixing bolt is inserted into a bolt hole formed in an upright portion of the mounting hanger, and the fixing bolt is screwed into a screw portion of an insert embedded in a concrete sleeper. Mounting structure of elastic pad for concrete sleepers. 4. In the elastic pad, both side edges of the hard rubber layer and the soft rubber layers above and below the hard rubber layer are provided more inward than both lower edges of the concrete sleeper, and the hard rubber layer and the upper soft rubber layer are provided. 4. A wing portion having a concave portion in which a step connecting portion connecting a horizontal locking portion and an upright portion of the mounting hanger is fitted on both side edges of the mounting hanger. A mounting structure for the elastic pad for concrete sleepers according to any one of the above. 5. A method for supporting a rail, removing gravel around an existing concrete sleeper buried in a gravel roadbed, and forming a hard rubber layer on the back surface of the concrete sleeper and both upper and lower surfaces or one of the surfaces. An elastic pad made of a soft rubber layer mounted on the elastic pad is applied thereto, and a side portion of the elastic pad is locked by a horizontal locking portion of a mounting hanger made of a hard material. A method of mounting an elastic pad for a concrete sleeper, wherein the side of the sleeper is fixed to the side with an adhesive tape. 6. A rail is supported to remove gravel around an existing concrete sleeper buried in a gravel roadbed, and a hard rubber layer is formed on the back surface of the concrete sleeper and both upper and lower surfaces or one of the two surfaces An elastic pad made of a soft rubber layer mounted on the elastic pad is applied thereto, and a side portion of the elastic pad is locked by a horizontal locking portion of a mounting hanger made of a hard material. A method for attaching an elastic pad for a concrete sleeper, comprising fixing a side surface of the sleeper with a double-sided adhesive tape, and penetrating a standing anchor of the mounting hanger and penetrating a fixing anchor into the concrete sleeper. 7. A rail is supported to remove gravel around an existing concrete sleeper buried in a gravel roadbed, and a hard rubber layer and upper and lower surfaces or one or both surfaces are provided on the back surface of the concrete sleeper. An elastic pad made of a soft rubber layer attached to the mounting pad is applied, and the side part of the elastic pad is locked by a horizontal locking part of a mounting hanger made of a hard material. Insert the fixing bolt into the hole,
A method of mounting an elastic pad for a concrete sleeper, wherein the elastic pad is screwed into a thread portion of an insert embedded in the concrete sleeper.