JPH08144204A - Vibrationproof elastic member for concrete sleeper and manufacture thereof - Google Patents

Abstract

PURPOSE: To prevent the damage of resiliency by easily mounting a vibrationproof elastic body on a concrete sleeper while hindering the intrusion of concrete into an uneven space section for giving the elastic body resiliency. CONSTITUTION: In a vibrationproof elastic member, a plurality of pressure- receiving sections 2b consisting of an elastic body are protruded onto the bottom section of a bottom-section elastic body having a shape covering base of at least lateral end section of a concete sleeper 1 and a lower outer circumferential surface, and foamed plates 2d are installed to sections except a plurality of the pressure-receiving sections 2b on the bottom section of the bottom-section elastic body without clearances. The concrete sleeper is manufactured in such a manner that the forms 4 of the concrete sleeper 1 are arranged so that the underside of the sleeper is placed as a top face or a side face, the vibrationproof elastic members are mounted at both end sections of a top face or a side face in the forms 4, ready-mixed concrete is placed in the forms 4, and the concrete sleeper with the vibrationproof elastic members is obtained by extracting concrete from the forms 4 after concrete is cured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete sleeper arranged on the lower side of a railroad rail, and more particularly to a vibration-proof elastic member mounted on its lower surface for vibration and sound insulation, and a vibration-proof elastic member. The present invention relates to a method for manufacturing a concrete sleeper with an elastic member.

[0002]

2. Description of the Related Art In railways, to prevent the sleepers under the rails from sinking, and to prevent vibration and noise, eliminate crushed stones under the sleepers and cover the bottoms and sides of the sleepers with an elastic body. In many cases, the bottom surface and the outer peripheral part of the product are hardened with concrete or the like. In particular, the elastic body on the lower surface that receives the most pressing force is important, but conventionally, after the concrete sleeper is completed, the grooved elastic body is bonded to the lower surface of the sleeper so as to obtain a vibration and soundproof effect. When laying such a concrete sleeper with elastic body on a track that does not require crushed stone, the groove end of the elastic body is jointed so that concrete does not flow into the groove portion of the elastic body with groove and the spring property does not harden. It was necessary to completely seal it with a sticking sheet, etc., and then cast concrete on the bottom of the concrete sleepers.

[0003]

A concrete sleeper with an elastic body, which is used in an area where crushed stone is not required as in the prior art, is a concrete sleeper after concrete is cast into the sleeper formwork and hardened. A method of attaching a grooved elastic body to the bottom surface is adopted. When the elastic body with the groove is attached to the hardened sleeper, it is necessary to move and reverse the stacked sleepers so that the bottom surface is the top surface, and therefore, a lot of man-hours are required and a wide work space is required. Further, in order to prevent concrete from flowing into the groove of the elastic body, it is necessary to attach a joint sheet to the groove. Further, in order to bond the elastic body to the bottom surface of the concrete sleeper, it is necessary to remove the latance of the bonding surface of the concrete sleeper. Further, there are many variations in the adhesive force between the elastic body and the concrete sleepers due to changes in temperature, humidity, etc., and therefore there are many economical and quality problems. Therefore, the present invention makes it possible to easily attach an elastic body to a concrete sleeper, and to prevent concrete from entering into the uneven space portion for giving the elastic body a spring property so that the spring property is not impaired. The purpose is to

[0004]

The present invention achieves the above object in a vibration-proof elastic member provided on a concrete sleeper and a method of manufacturing the concrete sleeper. The vibration-proof elastic member is on the bottom of the bottom elastic body having a shape that covers at least the bottom surface of the lateral end of the concrete sleeper and the lower outer peripheral surface.
A plurality of pressure receiving portions made of an elastic body are provided in a protruding manner, and a foam plate is provided on the bottom portion of the bottom elastic body excluding the plurality of pressure receiving portions without a gap. In the above-mentioned vibration-proof elastic member, the plurality of pressure receiving portions are integrally formed of a columnar body having a height lower than that of the side portions of the outer periphery with the same material as the bottom elastic body, and metal or resin protrusions are projected from the upper surface of the pressure receiving portion. The base portion is embedded in the pressure receiving portion. Since the upper portion of the pressure receiving portion is fitted into the hole of the ready-mixed concrete, the vibration-proof elastic member can be joined to the concrete sleeper without the protrusion. The method of manufacturing concrete sleepers is to use the above-mentioned vibration-proof elastic members, and the formwork of the concrete sleepers is arranged so that the underside of the sleepers is on or above, and the top or side surface of the formwork is The above-mentioned anti-vibration elastic member is attached to both ends, then ready-mixed concrete is placed in the formwork, and after hardening of concrete, it is taken out from the formwork so that a concrete sleeper with anti-vibration elastic member can be obtained. It is characterized by

[0005]

In the vibration-proof elastic member of the present invention, the pressure receiving portion is formed integrally with the bottom portion of the bottom elastic body that covers the bottom portion of the lateral end portion of the concrete sleeper and the lower outer peripheral surface, and the projection provided on the pressure receiving portion is formed. Since the concrete sleepers are embedded in the concrete, the vibration-proof elastic members can be joined to the concrete sleepers by placing the concrete. When pouring concrete on the formwork of the sleeper or when laying the sleeper on the concrete track floor, the part of the bottom elastic body excluding the plurality of pressure receiving parts is covered with the foam plate, Concrete does not flow into the periphery of the side surface of the pressure receiving portion, and the spring property of the pressure receiving portion is kept good. Therefore, the load and vibration received by the concrete sleeper are buffered by the pressure receiving portion and the bottom portion of the bottom elastic body and transmitted to the concrete floor of the track or the like. The method of manufacturing concrete sleepers is to install the vibration-proof elastic members in the concrete formwork of the sleepers, and then place the fresh concrete in the formwork, and the concrete sleepers and the vibration-proofing will be inserted through the protrusions of the vibration-proof elastic members. The elastic member is coupled, and moreover, it is possible to prevent concrete from flowing around the outer peripheral surface of the pressure receiving portion by the foam plate, and it is possible to easily manufacture with a small number of steps.

[0006]

EXAMPLE An example of a vibration-proof elastic member for concrete sleepers according to the present invention will be described with reference to FIGS. The concrete sleeper 1 having the rail mounting portion 1a on the upper surface is provided with the vibration-proof elastic members 2 on the bottom portions on both sides thereof so that the vibration-proof and sound-proof effects can be obtained. The vibration-proof elastic member 2 is provided on the bottom portion of the bottom elastic body 2a including a portion that covers the bottom surface of the lateral end portion of the concrete sleeper 1 and a side portion that covers the lower outer peripheral surface, and a plurality of elastic bodies made of the same material as the bottom portion. Individual pressure receiving part 2b
Are provided at appropriate intervals, and projections 2c are provided on the upper surface of each pressure receiving portion 2b, and a foam plate 2d is provided on the bottom portion of the bottom elastic body 2a excluding the plurality of pressure receiving portions 2b without gaps. Has been. In this embodiment, the anti-vibration elastic member is divided into two because it is provided at both lateral end portions of the concrete sleeper, but it is also possible to form the anti-vibration elastic member in a state in which both side portions are connected by elastic plates made of the same material. Good.

The bottom elastic body 2a is made of natural rubber, synthetic rubber,
Made of recycled rubber, urethane rubber, etc., bottom elastic body 2
The height of the plurality of pressure receiving portions 2b formed integrally with is about several cm.
And the bottom elastic body is formed into a columnar body of a columnar shape or a prismatic shape which is lower than the outer peripheral side portion. Further, the protrusion 2c on the upper surface of the pressure receiving portion 2b is formed of metal or resin in a bolt shape, and when the bottom elastic member 2 and the pressure receiving portion 2b are molded, the large diameter portion of the base of the protrusion 2c is embedded and fixed in the pressure receiving portion 2b. Has been done. Protrusion 2c
The purpose of forming the bolts in the shape of bolts is to increase the bonding strength with concrete, and to form the protrusions 2 without forming bolts.
You may form c in the shape which has unevenness. The protrusion 2c
Even if the pressure-receiving portion 2b is not provided, the vibration-proof elastic member 2 and the concrete sleeper 1 can be coupled to each other because the pressure-receiving portion 2b is fitted into the concrete hole. The foam plate 2d is formed into a plate shape having a through hole 2e through which a plurality of pressure receiving portions 2b are made of foaming resin and is formed to have substantially the same thickness as the pressure receiving portion 2b. The foam plate 2d is formed on the bottom of the bottom elastic body 2a. By arranging the pressure receiving parts 2b on the foam plate 2d in the through holes 2e of the foam plate 2d,
, And the periphery of the side surface of each pressure receiving portion 2b is filled. The foam plate 2d is for preventing fresh concrete from flowing around the side surface of the pressure receiving portion 2b when placing concrete for making concrete sleepers or when laying sleepers on the concrete track floor. The load acting on the concrete sleeper is received by the pressure receiving portion 2b and the bottom portion of the bottom elastic body 2a, and the load and vibration are buffered and transmitted to the track floor. A concrete sleeper with a vibration-proof elastic member is laid on the track as shown in FIG. 5. The vibration-proof elastic member 2 is embedded in the concrete floor 3 of the track, and Since it is located in the groove 3a of the concrete floor 3, there is no problem in vibration proof even if it is not covered with the vibration proof elastic member 2.

Next, an example of a method for manufacturing a concrete sleeper will be described. When manufacturing a concrete sleeper with a vibration-proof elastic member, as shown in FIG. 6, a mold 4 having an open top and a sleeper shape is used. The formwork 4 is formed so that its upper surface is the underside of the sleepers, and the vibration-damping elastic members 2 are attached to both ends of the formwork 4 near the upper surface. In this case, the pressure receiving portion 2b and the protrusion 2 of the vibration-proof elastic member 2
Arrange so that c is at the bottom. Then, concrete is poured from the opening in the center of the upper surface of the formwork 4. in this case,
The vibration-proof elastic member 2 is provided with a plurality of pressure-receiving portions 2b, but since the periphery of the side surface thereof is filled with the foam plate 2d, fresh concrete does not flow into the periphery of the side surface of the pressure-receiving portion 2b. After the concrete in the form 4 is hardened, if it is taken out from the form 4, a concrete sleeper to which a vibration-proof elastic member is attached is completed. Note that the concrete in the mold 4 is hardened, so that the projections 2c of the vibration-proof elastic member 2 are joined to the concrete sleepers. In the above description, the formwork 4 was placed with concrete so that the bottom surface of the sleeper was on the top, but the formwork was arranged so that the bottom surface of the concrete sleeper was on the side surface, and the concrete was placed inside the formwork. It may be installed in the. In this case, the vibration-proof elastic member 2 is attached to the side surface opening of the mold so that the side surface can be closed by the side plate.

[0009]

According to the anti-vibration elastic member of the present invention, since the periphery of the side surface of the pressure receiving portion provided on the bottom elastic body is covered with the foam plate, when concrete sleepers are made, ready-mixed concrete is poured into the formwork. In this case, when the sleepers are laid on the concrete track floor, concrete does not flow into the surroundings of the pressure receiving portion, and the spring property is kept good. Further, after the concrete cast in the mold is hardened, the protrusions provided on the pressure receiving portion are embedded in the concrete, so that the vibration-proof elastic member is coupled to the concrete sleeper. Therefore, when manufacturing a concrete sleeper with a vibration-proof elastic member, it suffices to mount the vibration-proof elastic member in the formwork and place concrete in the formwork. Can be easily manufactured without the need for.

[Brief description of drawings]

FIG. 1 is a front view of a concrete sleeper to which a vibration-proof elastic member of the present invention is attached.

FIG. 2 is a perspective view of the vibration-proof elastic member with a foam plate removed.

FIG. 3 is a perspective view of a foam plate.

FIG. 4 is a perspective view of the vibration-proof elastic member with a foam plate attached.

FIG. 5 is an explanatory diagram showing a state where concrete sleepers with vibration-proof elastic members are arranged on the track.

FIG. 6 is an explanatory view showing a method of manufacturing a concrete sleeper with a vibration-proof elastic member.

[Explanation of symbols]

 1 Concrete sleeper 2 Vibration-proof elastic member 2a Bottom elastic body 2b Pressure receiving part 2c Protrusion 2d Foam plate 2e Through hole 3 Concrete floor 3a Concrete floor groove 4 Formwork

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shoichi Kobayashi 5-6-2 Maebaru East, Funabashi City, Chiba Prefecture (72) Inventor Toyoji Goto 1-10-9 Kamiookanishi, Yokohama City, Kanagawa Prefecture

Claims (3)

[Claims] 1. A vibration isolating elastic member provided so as to cover lower side portions of both sides of a concrete sleeper, and a bottom portion of a bottom elastic body having a shape that covers at least a bottom surface of a lateral end portion and a lower outer peripheral surface of the sleeper. A concrete characterized in that a plurality of pressure-receiving portions made of an elastic body are provided on the top, and a foam plate is provided on the bottom portion of the bottom elastic body excluding the plurality of pressure-receiving portions without a gap. Anti-vibration elastic material for sleepers. 2. The plurality of pressure receiving portions are integrally formed of a columnar body having a height lower than that of a side portion of the outer periphery with the same material as the bottom elastic body, and further have a metal or resin protrusion protruding from the upper surface of the pressure receiving portion. The vibration-proof elastic member for concrete sleepers according to claim 1, wherein the base portion is embedded in the pressure receiving portion. 3. The vibration-proof elastic member according to claim 1 or 2, wherein the concrete sleeper formwork is arranged so that the underside of the sleeper is the upper side or the side face, and both ends of the upper face or the side face in the formwork. A concrete sleeper, characterized in that a concrete sleeper with a vibration-proof elastic member is obtained by placing the concrete concrete into the formwork and then, after hardening the concrete, removing it from the formwork. Method.