JPH045527Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a rail fastening device that is applied to concrete sleepers, slabs, etc.

(Prior art) Conventionally, this type of rail fastening device screws and tightens a hexagon bolt for rail fastening into an embedded plug embedded in a sleeper, etc., and pressurizes and tightens the rail using a spring clip for holding the rail. It is common to wear them.

The rail fastening device has the advantage of being easy to fasten and replace, but on the other hand, since it has a screw structure, it is necessary to manage fastening forces such as tightening torque.

For this reason, instead of using screws, rail holding clips made of intricately curved wire springs were used, for example, in Japanese Patent Publication Nos. 57-47321 and 61-61.
A so-called screwless rail fastening device as shown in Publication No. 38282 tends to be widely used in foreign countries, especially in developing countries.

(Problem to be solved by the invention) However, the screwless rail fastening device uses a rail holding clip made of a wire spring that is complicatedly curved, and uses impact force, leverage, etc. when fastening the rail. This is generally the case, and there is a problem in that the rail holding clips, other members, and fastening devices become larger.

(Means for solving the problem) The present invention was proposed to solve the above problem. an embedded metal fitting formed in a T-shaped part having a head piece that extends horizontally and has a curved wedge surface on the lower surface; a spring clip for holding down a rail, which is provided with a long groove hole that is longer and wider than the other half, and is disposed between the side of the rail and the sleeper or slab;
It is interposed between the spring clip and the head piece of the embedded metal fitting, and the upper surface is formed into a curved wedge surface with the same curvature as the lower surface of the head piece, and the lower surface has a thickness that gradually increases as it rotates. The present invention relates to a rail fastening device characterized in that the wedge member is formed into a curved wedge surface having a curvature different from that of the upper surface.

(Function) Since the present invention is constructed as described above,
The spring clips for holding down the rail are arranged parallel to the rail, and the long groove hole drilled in the center of the spring clip is inserted into the concrete sleeper or the head extending in the longitudinal direction of the rail at the upper end T-shaped part of the embedded metal fitting embedded in the slab. By rotating the spring clip through 90 degrees after it has been inserted into the piece, the rail holding spring clip is simply installed between the sleeper or slab and the bottom side edge of the rail.

Next, the wedge material is wedged between the upper surface of the spring clip and the head piece of the embedded metal fitting. The upper surface of the wedge is formed into a curved wedge surface with the same curvature as the lower surface of the head piece, and the lower surface of the wedge is formed into a curved wedge surface with a different curvature from the upper surface. Since the spring clip is configured to gradually increase in size as the spring clip rotates, the wedge material is slid along the lower surface of the head piece as it is wedged between the spring clip and the head piece. The rail is then elastically clamped by the spring clip.

(Effects of the invention) As described above, according to the present invention, a long groove hole that is longer and wider than the head piece of the T-shaped upper end of the embedded metal fitting is bored in the center of the rail holding spring clip. After inserting the same long slot into the head piece,
By rotating, the spring clip can be easily set, and by inserting a wedge between the spring clip and the head piece of the stud, the spring clip can be compressed. tighten and elastically clamp the rail. Since the rail lateral pressure is supported by the lateral pressure receiving portion of the spring clip itself and does not act directly on the embedded metal fitting, the embedded metal fitting can be made smaller.

Furthermore, when inserting the wedge, the wedge member uses the lower surface of the head piece as a fulcrum and rotates while sliding between the lower surface of the head piece and the upper surface of the rail holding spring clip. Work becomes easier.

(Example) The present invention will be described below with reference to the illustrated embodiments.

Rails 3 are laid on concrete sleepers 1 via track pads 2.

Reference numeral 4 denotes an embedded metal fitting whose lower part is buried in the sleeper 1, and the upper end is formed into a T-shaped part with a horizontal head piece 4a extending in the longitudinal direction of the rail 3, and the lower end is formed into a T-shaped part with a horizontal head piece 4a extending in the longitudinal direction of the rail 3. The head piece 4a is formed into an inclined surface 4b whose width gradually increases, or a protruding ridge 4b' is provided on the outer circumferential surface, and the lower surface 4c of the head piece 4a is a It is formed into a curved wedge surface having a curvature R centered at a position O that is eccentric by . 4d in the figure is an insulating coating layered on the outer peripheral surface of the embedded metal fitting 4.

Reference numeral 5 denotes a rail holding spring clip, which extends in the longitudinal direction of the clip at its center, and has the head piece 4
A through hole 5a that is longer and wider than a is bored.

6 is a bifurcated wedge member, and the upper surface 6a is the head piece 4a.
is formed into a curved wedge surface having the same curvature R as the lower surface 4c, the lower surface 6b is located on the central axis, and the point O
The wedge material 6 is formed into a curved wedge surface having a curvature R' larger than the curvature R, centered on a point O' located above by an amount b, and is configured such that the thickness of the wedge material 6 gradually increases as it rotates. ing.

At this time, the difference in curvature between the lower surface 6a and the upper surface 6b (R'-R) = b and the curvature ranges O and O' are calculated according to the performance of the rail holding spring clip 5, that is, the pressing force and the amount of deflection. It may be changed as appropriate.

Further, fulcrum holes 6C, 6C, and 6C' of a wedge mounting jig are formed in the tips of the pair of fork-shaped pieces 6A and 6A of the wedge member 6 and in the base piece 6B that connects the two fork-shaped pieces 6A, respectively. A movement-preventing protrusion 6d that fits into the long groove hole 5a of the spring clip 5 is protruded from the base piece 6B.

Reference numeral 7 designates a seat for a rail holding spring clip embedded in the sleeper 1.

8 is a jig for mounting the wedge material 6, which has a vertical handle 8a;
An inverted L-shaped piece 8C having a protrusion 8b that engages with the fulcrum hole 6C' of the base piece 6B of the wedge member 6 is fixed to the lower end of the wedge member 6, and a gate-shaped piece 8 is connected to the rear end of the same piece 8C.
A protrusion 8e that engages with the fulcrum hole 6C of the forked piece 6A in the wedge member 6 is provided at the tip of the wedge member 6 in a protruding manner.

Since the illustrated embodiment is constructed as described above, the rail holding spring clip 5 is placed parallel to the rail 3, and the long slot 5a is inserted into the head piece 4a of the embedded fitting 4.
3, the spring clip 5 is rotated 90 degrees so that the outer curved end is seated in the spigot 7, and the inner free end is locked to the bottom side edge of the rail 3. Then, as shown in FIG. As shown in FIG.
C', 6C, 6C', and insert the long slot 6e formed between the pair of fork-shaped pieces 6A, 6A of the wedge member 6 into the body of the lower part of the head piece 4a of the embedded fitting 4; Thereafter, the wedge material 6 is removed by the jig 8 using leverage.
By sliding and rotating between the lower surface 4c of the head piece 4a and the upper surface of the rail pressing spring clip 5, the spring clip 5 is pressed down and the rail 3 is elastically fastened. . At this time, the protrusion 6d of the wedge member 6 is engaged with the elongated hole 5a of the spring clip 5 to prevent the wedge member 6 from moving.
(See FIGS. 1 and 2.) FIG. 4 shows a case where a metal fitting 4 having protruding ridges 4b' protruding from its outer peripheral surface is used as the embedded metal fitting 4.

Since the illustrated embodiment is configured as described above, the rail lateral pressure is supported by the rail pressing spring clip 5, and since the rail lateral pressure does not directly act on the embedded metal fitting 4, the embedded metal fitting 4 can be made relatively compact.

Further, when the wedge material 6 is wedged between the lower surface 4c of the head piece 4a of the embedded fitting 4 and the rail holding spring clip 5, it slides between the two using the lower surface of the head piece 4a as a fulcrum. Therefore, the wedge insertion work is performed using a simple jig 8 with both ends of the wedge material 6 as fulcrums, and according to the embodiment described above, the conventional shape is In the rail fastening device using the leaf spring 5 for holding the rail, a screwless rail fastening device that is easy to perform rail fastening work and management is constructed by using a wedge material 6 with a simple structure. be.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing one embodiment of the rail fastening device according to the present invention, FIG. 2 is a plan view thereof, and FIG.
FIG. 4 is a vertical sectional front view showing another embodiment of the rail fastening device according to the present invention, FIGS. 5A, 5B, and 5C.
The figures are a front view, a side view, and a plan view of the embedded metal fitting, and FIGS. 6A, 6B, and 6C are a front view, a side view, and a plan view, respectively, showing other embodiments of the embedded metal fitting. , 7A and 7B are respectively a plan view and a front view of the rail presser spring clip, 8A and 8B are a front view and a plan view of the wedge material, and 9A
9A and 9B are a front view and a side view, respectively, of the wedge material mounting jig. 1... Concrete sleepers, 3... Rails, 4...
... Embedded metal fitting, 4a ... Head piece, 5 ... Spring clip for holding down the rail, 5a ... Long groove hole, 6 ... Wedge material.

Claims (1)

[Scope of utility model registration request] An embedding fitting formed in a T-shaped part whose lower end is embedded in a concrete sleeper or slab, whose upper end extends horizontally along the longitudinal direction of the rail, and whose lower surface has a head piece formed into a curved wedge surface. and a rail having an elongated hole extending in a direction perpendicular to the rail and being longer and wider than the head piece of the T-shaped part in the central part, and disposed between the rail side part and the sleeper or slab. The holding spring clip is interposed between the spring clip and the head piece of the embedded metal fitting, and the upper surface is formed into a curved wedge surface with the same curvature as the lower surface of the head piece, and the lower surface is formed as a curved wedge surface as it rotates. A rail fastening device comprising a wedge material formed into a curved wedge surface having a different curvature from the upper surface so that the thickness gradually increases.