JPH0881901A - Support bolt-type sleeper for ballastless iron girder bridge - Google Patents

Abstract

PURPOSE: To provide a support bolt type sleeper suitable for a ballastless iron girder bridge by mounting two expandable support bolts arranged in the radial direction of a main body at a position separated equally to the central spacing of main girders of an iron girder bridge in the longitudinal direction of the main body. CONSTITUTION: Two support bolts 4 are mounted to both ends of a main body 2 respectively. A distance A between mounting positions of the bolts 4 on both sides is arranged to be equal to a space B between the centers of main girders 5 on both sides. The mounting positions of the bolts 4 for sleepers 1 are arranged to conform to the central position of main girders 5 so that the sleepers may be installed on the main girders 5. Then, the bolts 4 are screwed with nuts 7 buried in the main body 2 so that they may be mounted expandably. The lower end is projected below the main body 2 so that it may be loaded on a cover plate 9. The sleepers 1 are installed without being hindered by the head of a rivet 10, on the main girders 5, and fixed with the main girders 5 by means of hook bolts 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support bolt type sleeper for a flatbed iron girder bridge.

[0002]

[Problems to be Solved by the Invention] On railroad floors, sleepers have been concreted for a long time, and wooden sleepers are rarely used for replacement on the main track, but on railroad girder bridges with no floors, wood sleepers are still used. No sleepers are used, and a packing material (wood) for height adjustment is laid on the main girder so that the protruding rivets are not disturbed, and a wooden sleeper is laid on it. The fact is that it is posted.

However, in recent years, the supply of good quality wood is insufficient,
Since the price is soaring and the above-mentioned processing is required, the use of wood sleepers is not only in terms of durability but also in terms of cost and labor saving, and improvement is desired. It was rare.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in response to the above-mentioned needs, and an object of the present invention is to provide a supporting bolt type sleeper suitable for use in an empty girder bridge.

[0005]

The construction features of the support bolt type sleeper for a flatbed iron girder bridge of the present invention (hereinafter simply referred to as the sleeper of the present invention) is that the main body is made of reinforced concrete or reinforced synthetic resin. In the longitudinal direction, two telescopic support bolts are attached to the main girder of the iron girder bridge at positions equally spaced apart from each other in the width direction of the main body.

In the sleeper of the present invention, a vertical hole is provided at the main bolt mounting position, a nut is embedded in the lower portion of the vertical hole, and an anchor plate is embedded in the upper end position of the nut. It is preferable to screw the support bolt to the nut.

[0007]

DESCRIPTION OF THE DRAWINGS In the drawings showing an embodiment of a sleeper of the present invention, reference numeral 1 is a sleeper, main body 2 of which is reinforced concrete, and reinforcing bar 3 is embedded therein. Alternatively, the main body 2 may be made of reinforced synthetic resin (for example, urethane resin reinforced with glass fiber).

Two support bolts 4 are attached to both ends of the main body 2 side by side in the width direction of the main body 2 in a manner described later. A is equal to the interval B between the centers of the left and right main girders 5, 5, and the sleeper 1 can be installed on the main girder 5 by aligning the mounting position of the support bolt 4 with the center position of the main girder 5. .

A vertical hole 6 penetrating the main body 2 is provided at a mounting position of the support bolt 4, a nut 7 is embedded in a lower portion of the vertical hole 6, and two nuts 7, 7 are provided at an upper end position of the nut 7.
A common anchor plate 8 is buried in.

The support bolt 4 is screwed to a nut 7 and is attached to the cover plate 9 so that it can extend and contract. The lower end of the support bolt 4 projects below the main body 2 and is placed on the cover plate 9 of the main girder 5 to cover the cover plate. Rivet 10 protruding above 9
The sleeper 1 can be installed on the main girder 5 without being disturbed by the head of the user. At this time, the height of the sleeper 1 can be freely adjusted because the support bolt 4 is extendable and retractable. No packing material is required for wood sleepers.

The support bolt 4 can be easily expanded and contracted by engaging a tool with the bolt head 11 and rotating the tool.

After the sleeper 1 is installed at a predetermined position, it is fixed to the main girder 5 with the hook bolts 12 in the same manner as in the case of the conventional wood sleeper.

[0013]

EFFECTS OF THE INVENTION Since the sleeper of the present invention is as described above, since the main body is made of reinforced concrete or reinforced synthetic resin, it has excellent durability and can be attached with a stretchable support bolt. This makes it easy to install on the main girder of an iron girder bridge with protruding rivet heads, and the installation height can be easily adjusted, as in the case of conventional wooden sleepers. Since no special processing or packing material is required, effects such as cost reduction and labor saving can be expected.

[Brief description of drawings]

FIG. 1 is a side view showing an installed state of a sleeper of the present invention.

FIG. 2 is a vertical sectional view of a support bolt mounting portion of a sleeper and an upper end portion of a main girder of the present invention.

FIG. 3 is a transverse sectional view of the same.

[Explanation of symbols]

1: Sleeper, 2: Main body, 3: Reinforcing bar, 4: Support bolt,
5: main girder, 6: vertical hole, 7: nut, 8: anchor plate, 9: cover plate, 10: rivet, 11: bolt head, 12: hook bolt.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 594168067 Shoro Nakagawa 1-34-14 Nishi, Toride-shi, Ibaraki (72) Inventor Yoshio Kusakabe 1100-6 Miyawada, Fujishiro-cho, Kitasoma-gun, Ibaraki (72) Inventor Toshiaki Doi 1-6-23 South of the East Coast of Chigasaki City, Kanagawa Prefecture 72-72 Inventor Tsuneyoshi Izumi 3-24 Ubocho, Ikeda City Osaka Prefecture 72-34 Inventor Masao Nakagawa 1-34-14 West Nishi, Toride City, Ibaraki Prefecture

Claims (3)

[Claims] 1. The main body is made of reinforced concrete, and two extendable support bolts are arranged in the width direction of the main body at positions equally spaced from each other in the longitudinal direction of the main girder of the iron girder bridge. Support bolt type sleepers for non-bedded steel girder bridges characterized by being installed. 2. The main body is made of a reinforced synthetic resin, and two extendable supports are arranged in the width direction of the main body at positions apart from each other in the longitudinal direction of the main body by a distance equal to the center interval of the main girders of the iron girder bridge. Support bolt type sleepers for non-floor iron girder bridges that are equipped with bolts. 3. A vertical hole is formed at a main bolt mounting position, a nut is embedded in a lower portion of the vertical hole, an anchor plate is embedded in an upper end position of the nut, and the support bolt is screwed into the nut. The support bolt type sleeper for a flatbed iron girder bridge according to claim 1 or 2.