JPH071426A - Method for molding bolt hole, etc., in concrete board and hole closing structure - Google Patents

Abstract

PURPOSE:To prevent a cap from being removed easily by forming an engagement channel on the whole periphery of a hole with an appropriate depth such as a bolt hole for assembly made in a concrete board and forming a flange which is engaged in the engagement channel on the periphery of a resin cap for closing the hole. CONSTITUTION:The pavement board 12 on the outer rail side of a concrete board 11 composing a pavement board of a crossing, which is fastened to a connecting fixture 14 by inserting a bolt 16 into a bolt hole 15 installed, is equipped with a cap 27. The upper end 22 of the bolt hole 15 has a large diameter, and an engagement channel 26 having a larger diameter than the upper end 22 is formed on the periphery of a stage part 25 between the main part 24 and the upper end part 22 of bolt hole 15. A flange 28 which is engaged in the engagement channel 26 is installed on the periphery of the cap 27 which is engaged to the upper end of the bolt hole 15. In this way, the cap 27 is not removed even when negative pressure is generated during the passage of a train ; the cap can be removed only by using a tool.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming a bolt hole to be drilled in a concrete plate constituting a pavement board used for railroad crossings, and a hole closing structure.

[0002]

2. Description of the Related Art A concrete board, for example, a concrete board 1 which constitutes a paving board used for railroad crossings as shown in FIG.
In this case, a bolt hole 2 for assembly is bored, or an injection hole (not shown) for injecting an injecting agent is bored in the lower surface of the concrete plate 1.

Then, the concrete board 1 is fixed with bolts 3 and the like.
After assembling, the bolt hole 2 is closed with a rubber cap 4 or the like in order to prevent dust or water from entering the bolt hole 2. In the figure, 5 is a rail, 6 is a connecting metal fitting, 7 is a T bolt, and 8 is a rubber chute.

[0004]

However, since the conventional cap 4 is simply fitted into the bolt hole 2, a negative pressure is generated when the train passes, and the cap 4 may be sucked up and come off. However, it often happened that a third party mischievously picked them up.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to provide a hole closing structure in which the cap does not easily come off and a hole forming method. First, a fitting groove is formed over the entire circumference at the periphery of an appropriate depth of a hole for assembling such as a bolt hole for assembling in a concrete plate or an injection hole for injecting an injecting agent, and the hole is closed. Characterized in that a flange that fits into the fitting groove is formed on the periphery of the resin cap that

Secondly, when a concrete plate is molded, a steel ring corresponding to the size of the hole is fitted in advance to a position where a hole is to be formed, and a resin ring having a flange formed around the lower edge is fitted to the steel rod. Is placed, and concrete is poured to form a concrete plate, the steel rod is removed, and the ring is further removed to form a hole with a fitting groove.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 11 consists curve inside pavement plate 13. the curve outside pavement plate 12 a concrete plate constituting the pavement plate crossings, the connecting member 14, bolt holes 15 bored in the outer rail side paving panel 12 Bolts 16 inserted into the inner rail side pavement plate 13 and T bolts 18 inserted into the fitting pieces 17 fixed to the inner rail side pavement plate 13.
Etc. are connected and integrated.

Reference numeral 19 is a flange way formed between the rail 20 and the inner rail side pavement plate 13, and 21 is a rubber chute fitted into the flange way 19. (For details of the structure of the level crossing pavement plate, see Japanese Patent Application No. 4-307571.
See issue. )

The upper end portion 22 of the bolt hole 15 is a bolt.
The head portion 23 of 16 has a large diameter so that it can be rotated, and the diameter of the stepped portion 25 between the main body portion 24 and the upper end portion 22 of the bolt hole 15 is made larger than that of the upper end portion 22. The fitting groove 26 is formed over the entire circumference.

Reference numeral 27 denotes a cap fitted to the upper end portion 22 of the bolt hole 15 , which is molded of a resin material such as rubber and has a flange 2 that fits in the fitting groove 26 on the periphery thereof.
8 is formed.

Next, a method of forming the bolt hole 15 will be described. Small diameter part 2 forming main part 24 of bolt hole 15
9 and a large-diameter portion 30 forming the upper end portion 22 of the bolt hole 15 , and a steel rod 31 integrally formed with the flange 3 at the lower edge periphery.
2 is prepared, and a ring 33 adapted to be fitted into the large diameter portion 30 of the steel rod 31 is prepared.

When a concrete plate which is the inner rail side pavement plate 13 is formed, a steel plate having a large diameter portion 30 fitted with a ring 33 at a position where a bolt hole 15 is formed in a form (not shown). The rod 31 is arranged and concrete is poured to form a concrete plate. (See Figure 2)

After that, when the concrete plate is solidified and the form is removed, the steel rod 31 is pulled out, and the ring 33 is further removed to complete the bolt hole 15 with the fitting hole 26. (Fig. 3
reference)

In the embodiment, the method of forming the bolt holes and the hole closing structure of the concrete plate which constitutes the pavement plate used for the railroad crossing are described, but the present invention is not limited to this, and the bottom surface of the concrete plate is not limited to this. It can also be used as an injection hole for injecting an injection agent.

[0015]

As described above, according to the present invention, an assembling bolt hole formed in a concrete plate or an injection hole for injecting an injecting agent or the like is fitted over the entire circumference at an appropriate depth. Since a mating groove is formed and a flange that fits in the fitting groove is formed on the periphery of a resin cap that closes the hole, the cap can be removed even if a negative pressure is generated when the train passes. Moreover, since it cannot be removed unless a tool is used, it is possible to reduce the withdrawal by the mischief of a third party.

Further, according to the present invention, when a concrete plate is formed, a resin ring in which a flange is formed on the lower edge of a steel rod is formed in advance at a position where a hole is to be formed, according to the size of the hole. Place the fitted ones in the mold, pour concrete into the concrete plate, remove the steel rod, and then remove the ring to form the fitting grooved holes. The concrete plate has a practically useful effect such that it can be molded extremely easily.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a railroad crossing showing an assembled state of a pavement plate adopting a bolt hole closing structure according to the present invention.

FIG. 2 is a partially enlarged vertical sectional view showing a state at the time of forming a bolt hole.

FIG. 3 is a partially enlarged vertical sectional view showing a state when a bolt hole is completed.

FIG. 1 is a vertical cross-sectional view of a main part of a railroad crossing showing an assembled state of a pavement plate adopting a conventional bolt hole closing structure.

[Explanation of Codes] 11 Concrete Plate 15 Bolt Hole 26 Fitting Groove 27 Cap 28 Flange 31 Steel Rod 32 Flange 33 Ring

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[Procedure amendment]

[Submission date] February 18, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a railroad crossing showing an assembled state of a pavement plate adopting a bolt hole closing structure according to the present invention.

FIG. 2 is a partially enlarged vertical sectional view showing a state at the time of forming a bolt hole.

FIG. 3 is a partially enlarged vertical sectional view showing a state when a bolt hole is completed.

FIG. 4 is a vertical cross-sectional view of a main part of a railroad crossing showing an assembled state of a pavement plate adopting a conventional bolt hole closing structure.

[Explanation of Codes] 11 Concrete Plate 15 Bolt Hole 26 Fitting Groove 27 Cap 28 Flange 31 Steel Bar 32 Flange 3 3 Ring

Claims (2)

[Claims] 1. A fitting groove is formed over the entire circumference at the periphery of an appropriate depth of a hole for assembling such as a bolt hole for assembling in a concrete plate or an injection hole for injecting an injecting agent, and the hole is closed. A hole closing structure in a concrete plate, characterized in that a flange that fits into the fitting groove is formed on the periphery of the resin cap. 2. When a concrete plate is molded, a steel rod corresponding to the size of the hole at a position where a hole is formed is fitted with a resin ring having a flange formed on the lower edge of the resin plate. A method for forming bolt holes, etc. in a concrete plate, characterized in that it is placed in a formwork, concrete is poured into it to form a concrete plate, then the steel rod is removed, and then the ring is removed to form holes with fitting grooves. .