JPH0492001A - Rubber pad for sleeper and manufacture of sleeper with rubber pad - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a rubber pad that is attached to the bottom of sleepers placed under railway rails for vibration and sound insulation, and Regarding the manufacturing method of girder concrete sleepers.

[Conventional technology] Vibrations caused when trains, etc. run on railway rails.

Because the noise is so loud, rubber mats are laid under the gravel on which railway sleepers are installed.

It is also known that the lower surface of the sleeper itself is covered with urethane foam and used as a cushioning material to improve vibration and soundproofing effects. In this case, concrete sleepers were made from concrete and formwork, and after being attached to a separate formwork, urethane foam was injected and adhesively bonded to the lower surface of the concrete sleepers.

[Problem to be solved by the invention 1 Conventionally, there is a structure in which a foamed urethane vibration isolating material is attached to the lower surface of a concrete sleeper. At that time, it was difficult to handle heavy concrete sleepers, and the manufacturing method was not very desirable.
p.

In addition, conventional single-digit concrete sleepers pasted with foamed urethane material or rubber material by post-adhesion have had problems such as variations in adhesive strength and deterioration of the adhesive over time.

Therefore, the present invention makes it possible to efficiently and economically manufacture concrete sleepers having a cushioning material on the bottom surface, and also prevents rainwater from entering the gap between the cushioning material and the concrete sleepers. The purpose is to improve durability.

[Means for Solving the Problems] The present invention achieves the above object, and the method for manufacturing sleepers with rubber pads includes molding a rubber pad having a shape to cover the lower surface of the sleeper, leaving it in place so that one side of the sleeper is Create a concrete formwork for sleepers that will lie horizontally, place the rubber pads on the bottom side of the sleepers in the concrete formwork, and then
From the top of the formwork, insert the concrete to complete the sleepers with rubber pads.

The rubber pad for sleepers of the present invention consists of a bottom part that covers the bottom of the sleepers, and an upright part that extends from the periphery of the bottom surface and comes into contact with the lower side of the sleeper. A concave groove was provided into which the peripheral protrusion entered, and a concave portion extending toward the east of the water was provided at the upper portion of the outer periphery of the standing portion. In addition, in order to prevent misalignment between the rubber pad and the sleeper, one side of the bottom of the rubber pad! , 7. Concave portions or convex portions may be provided at appropriate intervals.

[Function] In the above-mentioned method for manufacturing sleepers with rubber pads, when the sleepers are made by pouring concrete, the rubber pads may be placed inside the concrete formwork, so that once the concrete poured into the formwork hardens, both can be created in a unified state. In addition, in the =1 concrete formwork, the top surface of the sleeper is oriented horizontally, so the top surface side of the sleeper is formwork 1,
- It can be made more accurately, and there is no problem even if the upper side of the form is in the driven state (12) because it will become the side of the sleeper.

Rubber pads for sleepers have grooves in the inner peripheral side of the upright wall, so when a single cleat is driven into the upper surface of the sleeper, concrete enters the groove, and once the concrete hardens, the rubber pads will separate from the sleepers. It won't come off. Furthermore, since a horizontal recess is provided at the upper part of the outer periphery of the upright wall, poured concrete will enter the recess and harden, thereby preventing the rubber pad from shifting relative to the concrete sleeper. Furthermore, since the horizontal recess is provided, the joint surface between the concrete sleeper and the rubber pad becomes higher in steps from the outside toward the center, and rainwater, etc. flows from the outside to the center through the joint surface. There's no way to get into it.

〔Example] An example of the present invention will be explained with reference to FIGS. 1 to 4.

A rubber pad 1 for a sleeper for vibration and soundproofing is formed of a band-shaped bottom part 3 that covers the bottom of the sleeper 2, and a standing part 4 that stands up from the periphery of the bottom part 3 and contacts the lower side of the sleeper. .

A concave groove 4a is provided on the inner peripheral side of the upright portion 4 of the rubber pad, so that the peripheral protrusion of the 11-ink sleeper fits into the concave groove 48 when the sleeper is created by nukurito driving. . Further, in this embodiment, a through hole 5 is provided from the groove 4a to the outer surface in the lateral direction to vent air when pouring concrete to create sleepers. i3. The grooves 4a may be provided along the entire periphery of the bottom surface portion 3, or may be arranged at appropriate intervals.

A horizontal recess 4b is provided at the upper part of the outer periphery of the standing wall 4,
When creating sleepers by pouring concrete, the recesses 4b are filled with concrete, and after hardening, the rubber pads 1
This prevents any misalignment between the concrete sleeper 2 and the concrete sleeper 2. In addition, this recessed part 4b makes it difficult for rainwater etc. to enter from the outside to the center side at the joint surface between them when it is integrated with the concrete sleeper.

Furthermore, recesses 6 are provided at appropriate intervals on the upper surface of the bottom surface 3 of the rubber pad, and a metal convex member 7 is vulcanized and bonded to each recess 6. The convex member 7 is embedded in the concrete poured for making the sleeper, so that displacement of the position between the rubber pad 1 and the concrete sleeper 2 can be prevented. Incidentally, without removing the convex portion H'l in the recessed portion 6, it is also possible to use only the recessed portion 6 to prevent the device from shifting from the sleeper.

In the F example, the rubber pad 1 was formed integrally so as to cover the entire F side of the concrete sleeper 2, but it may be formed into two parts. Furthermore, by providing appropriate grooves on the bottom surface of the rubber pad, the spring constant of the rubber pad can be adjusted.

Next, a method for manufacturing sleepers with rubber pads will be explained with reference to FIG.

In order to make sleepers 2 from concrete, a concrete formwork 8 and the rubber pad 1 are prepared.

Note that reinforcing members 8a are provided on the outer periphery of the formwork 8 at appropriate intervals. :'The concrete formwork 8 is created so that the top surface 9 of the sleepers faces sideways, and the rail installation is such that the inner side of the longitudinal side of the concrete formwork 8 corresponds to the -1-face of the concrete sleepers. A rubber pad 1 is placed on the concrete formwork 8, which has a shape 1 having a section 2a, etc.; and a side number facing the sleeper door side. In this state, if contour is poured from the -F opening of the concrete formwork 8, the concrete will enter the bottom wall 3 of the rubber pad 1, the horizontal grooves 4a and the recesses 4b, and the concrete When the rubber pad 1 and the concrete sleeper 2 are cured, the body is completed.

[Effects of the Invention] According to the present invention, if a sleeper is created by pouring concrete into a concrete formwork in which rubber pads are arranged, the rubber pads can be integrally removed (-1 digit concrete sleeper is completed and manufactured easily) in that step alone. It improves efficiency and is economical.Also, when pouring concrete, the top surfaces of the sleepers in the concrete formwork are oriented horizontally, so the top surfaces of the sleepers can be created with high precision.

In addition, rubber pads have a horizontal recess formed at the upper part of the outer periphery of the standing wall, and the concrete of the concrete sleeper enters into that part, so there is no chance of rainwater entering inside from the contact surface between the two. There is no possibility that the adhesive will deteriorate and reduce the vibration-proofing and sound-proofing effects. Furthermore, since a groove 1/J is provided on the inner upper part of the '1 wall,
There is no possibility that the rubber pad will come off from the concrete sleeper.

[Brief explanation of drawings]

Fig. 1 is a front view of a concrete sleeper to which the rubber pad of the present invention is attached, Fig. 2 is a partial plan view of the rubber bat, Fig. 3 is a sectional view of the rubber pad, and Fig. 4 is a partially enlarged view of Fig. 3. , FIG. 5 is an explanatory diagram showing a method of manufacturing sleepers with rubber pads. 1: Rubber pad 2: Sleeper 3: Bottom part 4; Standing part 4-hole 4b; Recessed part 8; Formwork 9
; Top view of sleepers Figure 1 Figure 2

Claims (3)

[Claims] (1) Form a rubber pad shaped to cover the lower surface of the sleeper, create a concrete formwork for the sleeper with the upper surface of the sleeper facing sideways, and place the rubber pad on the bottom side of the sleeper within the concrete formwork. A method for producing sleepers with rubber pads, which is characterized in that the sleepers and rubber pads are made in an integrated state by placing the sleepers in place and pouring concrete from the top of the concrete formwork. (2) A rubber pad to be attached to the bottom of a concrete sleeper, which has a bottom part that covers the bottom of the sleeper, and an upright part that stands up from the periphery of the bottom surface and touches the lower side of the sleeper, and the lower part on the inner circumferential side of the upright part. A rubber pad for a sleeper, characterized in that a concave groove into which a peripheral protrusion of a concrete sleeper enters is provided, and a horizontal recess is provided at the upper part of the outer periphery of the upright part. (3) The rubber pad for sleepers according to claim 2, characterized in that the upper surface of the bottom surface of the rubber pad is provided with concave portions or convex portions at appropriate intervals.