JP2987755B2 - Mounting method of ladder type sleeper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a vibration-damping member for a ladder-type sleeper, and more particularly, to a ladder-type sleeper in which a vertical beam of a ladder-type sleeper supporting a rail and a sleeper pad are integrally fixed. The present invention relates to a method of mounting a sleeper for sleepers.

[0002]

2. Description of the Related Art There are two types of conventional high-speed tracks, such as Shinkansen bullet trains, a ballast track track and a slab track. A ballast track track is constructed by placing a sleeper on a ballast track formed by laminating ballasts. The track is a track on which a rail is laid, and the slab track is a track on which a rail is laid on a concrete slab.

[0003]

In a ballast ballast track, a vibration isolator made of rubber or the like is attached to a lower surface of the sleeper to absorb and reduce vibration generated when a railway vehicle passes on a rail. Is being developed. Since the vibration isolator is subjected to repeated compressive loads and shear loads in the front-rear direction, it must be sufficiently fixed to prevent the vibration isolator from shifting from the sleeper during use.

Conventionally, as a method of integrally fixing the vibration damping material and the sleeper, for example, a method of bonding via an adhesive or a method of forming a concrete beam of a sleeper pad by forming the surface of the sleeper pad into an uneven shape. How to fix at the same time as curing,
Further, as disclosed in Japanese Patent Application Laid-Open No. 2-133360, there has been proposed a method of integrating a nut-shaped plug and a screw nail.

[0005] However, as described above, the method of integrating using an adhesive or an uneven surface is as follows.
Repeated compressive load and tensile load in the front-rear direction repeatedly act, so they peel off in a short period of time, causing problems in reliability and workability, and are integrated using a nut-like plug and screw nail. In the case of the method, a lot of labor and time are required for processing, the method becomes expensive, and there is a problem in terms of durability.

The present invention has been devised in view of the conventional problems, and enables the sleeper pad and the longitudinal beam of the ladder type sleeper to be firmly integrated by a simple method, thereby improving reliability and workability. It is an object of the present invention to provide a method for mounting a ladder-type sleeper damper that can be manufactured at a low cost while improving the easiness.

[0007]

According to the present invention, in order to achieve the above object, a material for a longitudinal beam of a ladder type sleeper is formed in a mold.
Pour in and insert the fastening member on the longitudinal beam before the material hardens.
Place a sleeper pad with multiple through holes and counterbore,
In the material of the uncured longitudinal beam, formed into sleeper pads
Insert the fastening member from the insertion hole
Part is buried in the counterbore.
Integrally fixing sleeper pads via tie members
The gist of this is.

[0008] The present invention is constructed as described above, wherein a material for a longitudinal beam of a ladder type sleeper is cast into a mold, and before the material hardens, an insertion hole and a counterbore of a fastening member are formed on the longitudinal beam. Place a sleeper pad provided with a plurality, and, in the material of the uncured longitudinal beam, while inserting a fastening member from the insertion hole formed in the sleeper pad, and buried the head of the fastening member in the counterbore, By fixing the sleeper pad integrally via the fastening member together with the hardening of the material of the vertical beam, the sleeper pad and the vertical beam of the ladder type sleeper can be firmly integrated, improving reliability and workability. It can be improved and can be manufactured at low cost.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view, partially cut away, of a track of a train in which a longitudinal beam 1 of a ladder type sleeper according to the present invention is installed in parallel. The longitudinal beam 1 is integrally formed of a concrete material 1a, The track bed 2 is installed in parallel along a track via a sleeper pad 3 made of a rubber material or the like.

A rail 5 is installed on the longitudinal beam 1 of the ladder type sleeper via a track pad 4, and a skirt 5 a of the rail 5 is fixed on the longitudinal beam 1 via a fastening device 6. I have. A predetermined amount of ballast ballast 7 is sprayed between and outside the longitudinal beams 1, and the longitudinal beams 1 of the ladder type sleeper are used.
A ladder-type sleeper joint member 8 formed of a metal pipe whose outer peripheral surface is covered with a rubber or resin material at predetermined intervals along the orbital direction is fixed therebetween.

The sleeper pad 3 interposed between the longitudinal beam 1 of the ladder type sleeper and the ballast ballast 2 is for absorbing and reducing the vibration generated when the railway vehicle passes on the rail. When the vertical beam 1 is formed, it is integrally fixed via a fastening member 9 described later. That is, the manufacture of the longitudinal beam 1 of the ladder type sleeper is shown in FIG.
(E) As shown in FIG.
A concrete material 1a, which is a material of the longitudinal beam 1 of the ladder type sleeper, is cast therein (see (a) and (b) of FIG. 2), and before the concrete material 1a, which is the material, hardens, that is, is semi-hardened. Concrete material 1 which becomes vertical beam 1 in the state
As shown in FIG. 2 (c), the sleeper pad 3 made of a rubber material or the like in which a plurality of insertion holes 11 and counterbore holes 12 of the fastening member 9 are provided in advance is placed on a.

As shown in FIGS. 2D and 2E, iron, stainless steel or stainless steel is inserted into the uncured concrete material 1a of the vertical beam 1 from the insertion hole 11 formed in the sleeper pad 3. A fastening member 9 such as a nail made of a corrosion-resistant or rust-proof material made of resin or the like is inserted, and a head 9 of the fastening member 9 is inserted.
a is buried in the counterbore 12. In such a state, the hardening of the concrete material 1a of the longitudinal beam 1 and the fastening members 9
Are fixed, and the sleeper pad 3 is integrally and firmly fixed to the longitudinal beam 1 via the fastening member 9.

The insertion hole 11 and the counterbore 12 of the fastening member 9 formed in advance on the sleeper pad 3 are processed at the time of molding the sleeper pad 3 or after the molding.
Of the head 9a when the fastening member 9 is inserted and buried.
Is preferably not deeper than the surface of the sleeper pad 3. In addition, the outer peripheral surface of the insertion buried portion 9b of the fastening member 9 is inserted into the uncured concrete material 1a, and when the concrete material 1a is hardened thereafter, there is a pull-out resistance and a wedge effect, for example, as shown in FIGS. As shown in FIG. 4, it is preferable to form a screw-shaped uneven portion 13.

The shape of the insertion buried portion 9b of the fastening member 9 is not limited to the above-described embodiment, but may be various shapes as shown in FIGS. The material is not particularly limited as long as it can be easily inserted into the uncured concrete material 1a and has a shape having a pull-out resistance and a wedge effect after curing. Next, the fastening member 9 connects the longitudinal beam 1 and the sleeper pad 3 in the embodiment of the present invention.
Peeling test between the case where the concrete material 1a is fixed and the case where the concrete material 1a is hardened by setting and fixing the surface of the sleeper pad in a concavo-convex manner and the conventional fixing method using an adhesive. The result of the above will be described.

FIGS. 6 (a) to 6 (h) are explanatory views including a front view and a cross-sectional view of TYPE1 to TYPE8 of the conventional joining and fixing method. TYPE
1 to TYPE8. The TYPE 1 composed of the front view and the cross-sectional view of FIG. 6A shows a case where the surface of the sleeper pad 3a is fixed to the concrete material 1a of the longitudinal beam 1 without processing the surface of the sleeper pad 3a. TYPE2 consisting of a front view and a cross-sectional view of a sleeper pad 3a
Concrete surface 1a of longitudinal beam 1 by processing the surface of
TYPE 3 consisting of a front view and a cross-sectional view of FIG. 6C is attached to the surface of the sleeper pad 3a.
4 is integrated with the concrete material 1a of the longitudinal beam 1.
When the TYPE 4 is fixed to the concrete material 1a of the vertical beam 1 by forming a mushroom-shaped projection 15 at the center of the surface of the sleeper pad 3a, the TYPE 4 is composed of the front view and the cross-sectional view of FIG. In this case, when the TYPE 5 composed of the front view and the cross-sectional view of FIG. 6E is formed with a projection 16 having an uneven cross section on the surface of the sleeper pad 3a and fixed to the concrete material 1a of the vertical beam 1, The TYPE 6 composed of the front view and the cross-sectional view of FIG. 6 (f) has a concave-convex section 17 formed at the center of the surface of the sleeper pad 3a and is fixed to the concrete material 1a of the longitudinal beam 1 in FIG. TYPE 7 consisting of a front view and a cross-sectional view of FIG. 1) is formed by forming an uneven portion 18 having a cross-sectional tip open outward at the center of the surface of the sleeper pad 3a and fixing it to the concrete material 1a of the longitudinal beam 1.
TYPE8 consisting of a front view and a sectional view of FIG.
Is the sleeper pad 3a on the surface of the sleeper pad 3a.
In this case, pebbles and the like are buried and cured before vulcanization and curing, and then the pebbles are removed to form the concave portion 19 and fix the concrete material 1a of the longitudinal beam 1.

In contrast to Comparative Examples 1 to 8, according to the present invention, as described in detail with reference to FIGS. 1 to 3 above, Embodiment 1 in which the fastening members 9 are provided at two places, and This is a second embodiment provided at four locations. The peeling test was performed on the vertical beam 1
After fixing the sleeper pad 3 of 15 cm x 15 cm to the concrete material 1a, the center of the longitudinal beam 1 side is fixed to the fixed scale, and a string or the like is attached to the corresponding central part of the sleeper pad 3 side and gradually. The strength up to peeling was measured three times while being pulled up. In addition, the elapsed time after hardening of the concrete material 1a of each sample (concrete age)
Was 28 days. The results of the peel test are shown in Table 1 below.
It is as follows.

[0017]

[Table 1] As is clear from the above-mentioned peeling test, the peeling strength is much higher than that of the conventional comparative example, and the sleeper pad 3 and the longitudinal beam 1 of the ladder type sleeper can be firmly integrated with each other. And workability can be improved.

[0018]

As described above, the present invention provides a longitudinal beam of a sleeper pad and a ladder type sleeper by integrally fixing a longitudinal beam of a ladder type sleeper and a sleeper pad via a fastening member in a mold as described above. Can be firmly integrated, reliability and workability can be improved, and there is an effect that they can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a track of a train in which longitudinal beams of a ladder type sleeper according to the present invention are installed in parallel.

2 (a) to 2 (e) are explanatory views showing steps of manufacturing a vertical beam of a ladder type sleeper according to the present invention.

FIG. 3 is an enlarged front view of a fastening member.

FIGS. 4A and 4B are explanatory diagrams showing a method of inserting a fastening member.

FIG. 5 is an explanatory view showing another embodiment of (a) to (f).

6 (a) to 6 (h) are explanatory views of TYPE1 to TYPE8 which are a front view and a sectional view of a conventional joining and fixing method.

[Explanation of symbols]

Reference Signs List 1 vertical beam 2 roadbed or concrete slab 3 sleeper pad 4 track pad 5 rail 5a hem 6 fastening device 7 roadbed ballast 8 ladder type sleeper joint material 9 fastening member 9a head 9b insertion burial portion 10 formwork 1a concrete material 11 insertion Hole 12 counterbore

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kazuki Wakui 2-8-8 Hikaricho, Kokubunji-shi, Tokyo Inside the Railway Technical Research Institute (72) Inventor Hiromi Inoue 2--8 Hikaricho, Kokubunji-shi, Tokyo 38 Inside the Railway Technical Research Institute (72) Inventor Tomoyoshi Chujo 3-11-9 Sekido, Tama-shi, Tokyo (72) Inventor Masanao Tanzawa 3-68-27, Yotsuya, Fuchu-shi, Tokyo (56) Reference 55-44849 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E01B 3/00 E01B 3/28-3/42 E01B 3/46

Claims (1)

(57) [Claims] 1. A method for mounting a ladder-type sleeper vibration isolating member for integrally fixing a sleeper pad and a longitudinal beam of a ladder-type sleeper for supporting a rail, comprising: Before the material is hardened, a sleeper pad provided with a plurality of insertion holes and counterbores for fastening members is placed on the vertical beam, and the sleeper pad is formed in the uncured vertical beam material. Inserting the fastening member from the inserted hole, embedding the head of the fastening member in the counterbore, hardening the material of the vertical beam, and integrally fixing the sleeper pad via the fastening member How to attach a ladder-type sleeper anti-vibration member.