JPH05321201A - Rail fixture and method for fixing rail - Google Patents

Abstract

PURPOSE:To provide excellent durability and secure a rail sturdily to a concrete road bed. CONSTITUTION:A resilient stopper 22 is installed on an anchor bolt 14 whose one end is fixed to a concrete road bed and used as the reference to make locating of a base plate 12, on which a rail 1b is installed, and a rail clip 13 which holds down the rail 1b. The anchor bolt 14 and resilient stopper 22 are embedded in the concrete road bed, and the rail 1b is secured thereto by fastening a nut 15 fitted on the anchor bolt 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail fixing tool and a rail fixing method for fixing rails for supporting heavy objects such as railroad rails, and particularly suitable for laying rails on a concrete roadbed. Regarding things.

[0002]

2. Description of the Related Art Usually, railroad rails are thought of as familiar to private railways or JR railroads. However, the railway has various uses, and is also used for running stacker cranes for loading and unloading cargo. Some stacker cranes transport automobiles in a warehouse for automobiles, for example, in a stack of 15 stages, and therefore the rails for stacker cranes are loaded with a load larger than that of a general railroad track.

5 to 7 show an example of a conventional rail laying structure for a stacker crane, FIG. 5 is a plan view of an essential portion, FIG. 6 is a sectional view taken along the line AA of FIG. 5, and FIG. Is BB
It is a line sectional view. The pair of tracks 1a and 1b are laid on the concrete roadbed 2. The jig 3 includes rails 1a and 1
It is used for level adjustment when laying b.
After using it for level adjustment, it is directly embedded in concrete.

Therefore, as shown by the solid line in FIG. 5, the structure is actually buried in the concrete roadbed 2 and the rails 1a and 1b are placed on the concrete roadbed 2 as shown in FIG. The jigs 3 are provided at intervals of 1.2 to 1.5 m. Further, the rails 1a and 1b are, for example, 0.
It is fixed to the concrete roadbed 2 with a rail fixing tool 11 at intervals of about 5 m. Next, the fixing structure of the rails 1a and 1b will be described. Since both fixing structures have the same structure, the rail 1b shown in FIG. 7 will be described. The rail fixture 11 is composed of a base plate 12, an anchor clip 13, an anchor bolt 14, nuts 15 and 16, and the like.

When fixing the rail 1b, after the rail 1b is positioned by the jig 3 as shown in FIG.
The rail fixing tool 11 is fixed to the rail 1b at a predetermined interval. This fixing is performed by sandwiching the lower flange of the rail 1b by the base plate 12 and the rail clip 13.
It is done by tightening the nuts 15 and 16. As described above, after the rail fixture 11 is attached to the rail 1b, the concrete for forming the concrete track 2 is poured so that the nut 16 at the lower portion of the base plate 12 and the bolt 14 having the lower portion bent cannot be retained. Then, the rail 1b is laid on the concrete roadbed 2 by solidifying.

[0006]

However, when the structure of the conventional rail fixing tool 11 is viewed in detail, it has the following problems. That is, after laying the rails 1a and 1b,
In addition, it may be desired to tighten it on the concrete track 2. In such a case, since the nut 16 is embedded in the concrete track 2, the nut 15 screwed onto the anchor bolt 14 on the base plate 12 is tightened. However, since the lower side surface of the base plate 12 is positioned by the nut 16, the nut 15 is tightened so that the rail clip 13 presses the lower flange of the rail 1 b against the base plate 12.

In other words, even if the nut 15 is tightened,
Rail 1b, rail clip 13, base plate 12
Both of them are only tightened between the nut 15 and the nut 16, and are not directly tightened on the concrete track bed 2. Therefore, after the concrete roadbed 2 is solidified, the rail 1b cannot be more firmly fixed to the concrete roadbed 2, and even if it is necessary to tighten a part of the rail 1b to adjust the height, it can be performed. Can not. However, the rail 1b, the rail clip 13, and the base plate 12 do not float up from the concrete track 2 unless the bolt 14 comes out of the concrete track 2.

On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 3-8901, Japanese Utility Model Publication No. 3-89701 and the like, an excessive force is applied in the vertical and horizontal directions of the rail when the train is running. Then, in the structure of the conventional rail fixture 11, all the force that spreads laterally from the rail 1b is applied to the anchor bolt 14, and acts to push the anchor bolt 14 to the right in FIG. Moreover, this force acts every time the stacker crane passes over the rail. Therefore, if a high impact or high friction is applied like the crane rail, the anchor bolt 14 will bend for a long period of time.

Further, in the extreme case, since the nut 16 is fixed to the concrete, the anchor bolt 14 is cut at the lower interface of the base plate 12. If such an accident occurs, the concrete must be crushed and the anchor bolt 14 must be replaced, and the crane cannot be used until the replacement is completed and the concrete is solidified. An object of the present invention is to provide a rail fixing tool and a rail fixing method that are excellent in durability and can firmly fix the rail to the concrete roadbed.

[0010]

The above object of the present invention is achieved by the following items (1) and (2). (1) A rail fixture in which a base plate is inserted through an anchor bolt having one end embedded and fixed in a concrete track, and a lower flange of a rail placed on the base plate is fixed by a rail clip and a nut inserted through the anchor bolt. An elastic stopper is provided at a position corresponding to the lower surface of the base plate of the anchor bolt, and by tightening the nut, the rail clip and the base plate are moved along the axis of the anchor bolt, and the rail is moved to the concrete track. Rail fixing device configured to be tightened and fixed to.

(2) The elastic stopper is provided at a desired position of the anchor bolt for fixing the rail to the concrete roadbed, and the base plate on which the rail is placed and the rail clip for pressing the rail with the elastic stopper are used as nuts. A rail fixing method in which, after semi-fixing, a concrete track is formed by embedding one end of the anchor bolt and the elastic stopper, and after the concrete track is formed, the nut is tightened to fix the rail to the concrete track.

[0012]

According to the rail fixing device and the rail fixing method, when the nut is tightened after the concrete roadbed is formed, the elastic stopper is deformed so that the base plate and the rail clip move along the axis of the anchor bolt, that is, are fixed. The rail clips are clamped and fixed to the concrete track by the rail clips.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing a state where a rail fixing tool is temporarily fixed to a rail, FIG. 2 is a cross-sectional view of a main part showing a configuration of the rail fixing tool and a temporary fixing structure, and FIGS. 3 and 4 show a fixing state of the rail. It is a sectional view of an important part. Further, in describing the present embodiment, the reference numerals and the drawings used in the description of the conventional example will be appropriately incorporated.

First, the structure of a rail fixing tool 21 to which the present invention is applied and the mode of temporary fixing will be described with reference to FIGS. Since the structures and shapes of the rails 1a and 1b and the jig 3 for level adjustment are the same as the conventional ones, the structure and the fixing method of the rail fixture 21 for one rail 1b will be described.

Level adjustment of the rail 1b is carried out by placing the rail 1b on the jig 3 whose dimensions are adjusted as shown in FIG. Then, the rail fixture 21 is fixed to the rail 1b, but at this time, it is in a temporarily fixed state as described later. Further, the installation intervals of the jigs 3 and the fixing intervals of the rail fixtures 21 are set as in the conventional case.

The rail fixture 21 in this embodiment includes:
Instead of the nut 16 described in the conventional example, an elastic stopper 22 made of an elastic material is used. The elastic stopper 22 is formed of rubber or foaming resin in an annular shape, and before the nut 15 is screwed in, as shown in FIG.
It is fitted into the anchor bolt 14.

Since the inner diameter of the elastic stopper 22 is set smaller than the outer diameter of the anchor bolt 14, the elastic stopper 22 is elastically positioned at a desired position, in other words, positioned in an anti-fixed state. Therefore, although the position of the elastic stopper 22 can be freely changed, it does not move unless it is artificially moved.

A method of fixing the rail 1b will be described below. An elastic stopper 22 is fitted into the anchor bolt 14 and positioned at an appropriate position. This position is set in consideration of the thickness of the base plate 12, the rail clip 13, the spring washer 17, the tightening margin of the nut 15, and the like. Further, the anchor bolt 14 may be preliminarily provided with the fixed position mark of the elastic stopper 22 uniformly.

Next, the base plate 12 is inserted from the upper portion of the elastic stopper 22 into the anchor bolt 14 and then the rail clip 13 is inserted, and the nut 15 is tightened with the lower flange of the rail 1b held. Although not shown in FIG. 2, the rail fixture 21 is also attached to the left of the rail 1b.
The elastic stopper 22 is semi-fixed to the anchor bolt 14, but since it is tightly fitted into the anchor bolt 14, the base plate 12 does not slide down in the state of FIG.

Thus, before pouring concrete into the lower portion of the rail 1b, the rail 1b is leveled and the rail fixtures 21 are attached from both sides at predetermined positions. At this point, the base plate 12 has the rail 1b.
The left and right sides of the rail 1b are applied to the lower side surface of the rail 1b. Next, concrete is poured into the lower portion of the rail 1b to solidify the elastic stopper 22 and the anchor bolt 14 together with the concrete.

Next, the tightening of the rail 1b will be described. When the concrete is poured and solidified in the state of FIG. 2, the elastic stopper 22 is embedded in the concrete, but the elasticity is not impaired. Moreover, since the anchor bolt 14 is fixed to the concrete, by tightening the nut 15, the rail clip 13
The base plate 12 and the base plate 12 move downward, though very slightly, and the fastening force between the base plate 12 and the concrete track 2 increases. Since one end of the rail clip 13 is hooked on the lower flange of the rail 1b, the rail 1b is fastened to the concrete track bed 2 with a high fastening force.

That is, in the conventional structure, even if the nut 15 is tightened, the base plate 12 and the like are only tightened to the nut 16, but in this embodiment, by tightening the nut 15, the elastic stopper 22 is elastically deformed, With the downward movement of the base plate 12 and the rail clip 13, the rail 1b is directly fastened to the concrete track.

Next, the force that spreads laterally from the rail 1b will be described. Since the elastic stopper 22 also elastically deforms laterally, the anchor bolt 14 can flex laterally at the lower interface of the base plate 12. Therefore, the force spreading laterally from the rail 1b can be elastically received. In the conventional structure, since the nut 16 is provided in contact with the lower surface of the base plate 12, the anchor bolt 14 is cut by a cutter, so to speak. In this embodiment, the anchor bolt 14 is elastic stopper 22. Since it is deformed by, there is no way of applying a force like a cutter, and the anchor bolt 22 is not cut.

When the force spreading laterally from the rail 1b disappears, the elastic stopper 22 is deformable and the anchor bolt 14 also has a restoring force, so that the original state is restored. Therefore, an accident such as cutting of the anchor bolt 14 can be prevented in advance, and the safety and efficiency of transportation work can be improved.

Next, another shape of the elastic stopper 22 and another shape of the rail clip 13 will be described with reference to FIGS. 3 and 4. That is, the elastic stopper 22 may basically be an annular body, and may be formed in a cylindrical shape as shown in FIGS. 3 and 4. With this shape, the bending angle becomes small when the anchor bolt 14 bends as described above,
The range that can be restored expands.

Further, the rail clip 13 may be one having elasticity in the vertical direction as shown in FIG. 3, and the base plate 12 may be a so-called dish-shaped one as shown in FIG. it can. The combination of the elastic rail clip 13 and the dish-shaped base plate 12 allows the rear end portion of the base plate 12 to move when the rail clip 13 moves or deforms in the lateral direction.
It can be received by the inner surface of the and can be prevented from further deformation.

Further, as the rail clip 13, as shown in FIG.
As shown on the left side of the rail 1b, it is possible to apply a support leg formed downward so as to have elasticity as a whole. Rail clip 1 shown in FIG.
The rail clip 13 shown on the left side of the rail 1b in FIGS. 3 and 4 has an action of elastically pressing the rail 1b and an action of preventing the nut 15 from loosening. It is not always necessary to use such various rail clips 13 in pairs, but as shown in FIG. 4, it is possible to use those having different structures in combination.

[0028]

As described above, according to the rail fixing device and the rail fixing method of the present invention, an elastic stopper is provided on an anchor bolt whose one end is fixed to a concrete roadbed, and the rail is fixed on the basis of the elastic stopper. The base plate to be placed and the rail clip that holds down the rail were positioned, and the anchor bolt and the elastic stopper were embedded in the concrete track.

Therefore, by tightening the nut screwed to the anchor bolt at the upper part of the rail clip, the rail clip holding the rail and the base plate are moved integrally along the anchor bolt toward the concrete roadbed, and the rail is moved to the concrete roadbed. It is firmly tightened and fixed to. Further, since the elastic stopper is provided on the lower side surface of the base plate, the anchor bolt can be flexed, and even if a large lateral force is applied, the anchor bolt is not easily cut and durability can be greatly improved. Furthermore,
The elastic stopper can be manufactured from an inexpensive material such as rubber, and the cost of the elastic stopper can be reduced in combination with the simple structure of the entire fixture.

[Brief description of drawings]

FIG. 1 is a perspective view showing a rail fixing tool and a rail fixing method to which the present invention is applied.

FIG. 2 is a cross-sectional view of a main part showing a rail fixing tool and a rail fixing method.

FIG. 3 is a cross-sectional view of a main part showing another structure of the rail fixture.

FIG. 4 is a cross-sectional view of a main part showing another structure of the rail fixing tool.

FIG. 5 is a plan view showing a conventional rail installation.

FIG. 6 is a cross-sectional view of a main part showing leveling of a rail.

FIG. 7 is a cross-sectional view of an essential part showing a conventional rail fixture.

[Explanation of symbols]

 1a, 1b Rail 2 Concrete roadbed 3 Jig 11,21 Rail fixing tool 12 Base plate 13 Rail clip 14 Anchor bolt 15,16 Nut 22 Elastic stopper

Claims (2)

[Claims] 1. A rail fixture in which a base plate is inserted through an anchor bolt having one end embedded and fixed in a concrete roadbed, and a lower flange of a rail placed on the base plate is fixed by a rail clip and a nut inserted through the anchor bolt. An elastic stopper is provided at a position corresponding to the lower surface of the base plate of the anchor bolt, and by tightening the nut, the rail clip and the base plate are moved along the axis of the anchor bolt, and the rail is A rail fixture configured to be clamped and fixed to a concrete track. 2. The elastic stopper is provided at a desired position of an anchor bolt for fixing the rail to the concrete roadbed, and a base plate on which the rail is mounted and a rail clip for pressing the rail with the elastic stopper as a reference are half-fitted by a nut. A rail fixing method in which after fixing, a concrete track is formed by embedding one end of the anchor bolt and the elastic stopper, and after forming the concrete track, the nut is tightened to fix the rail to the concrete track.