JPH02120402A - Anchoring construction of base of anchor bolt in rail fastening device - Google Patents

Abstract

PURPOSE:To strengthen the fastening of an anchor bolt by curving an anchor plate insertion hole concentrically in the shape of a half circle by means of a steel plate, opening the base of the anchor bolt in T-shape at the upper part of a center thereof and providing a groove capable of turning 90 degrees from the insertion of the anchor bolt to the stopping condition to the inside thereof so that it is capable of adhering. CONSTITUTION:An anchoring construction of the base of an anchor T bolt 28 is so manufactured that the section shaped top of an anchor plate insertion hole 33 is formed in the shape of a half circle, and that a steel plate is curved so that an anchor plate 34 is adhered to the inside of the insertion hole 33. A bolt insertion hole 35 having a long hole is bored in the center of the upper part thereof, and the base of the T bolt is made in T-shape to form an opposed lane having a shape of a circular arc so as to adhere to the inside of the plate 34. A groove is so provided to a corner section on a diagonal line corresponding to fastening directions of nuts of the ends of a horizontal section that the anchor bolt 28 can turn in the range of 90 degrees from the insertion to the stopping condition. According to the constitution, an effect on the strength of a concrete sleeper can be reduced.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a rail fastening device for fastening a rail to a concrete sleeper, in which an anchor bolt is inserted into and erected in the concrete sleeper, and the anchor plate is connected to the anchor bolt. This invention relates to a structure for fixing the base of an anchor bolt in a so-called T-bolt type rail fastening device in which the base of the anchor bolt is fixed.

(Prior art) Conventionally, in a T-bolt type rail fastening device, the seventh
As shown in the figure, long bolt insertion holes 3 perpendicular to the rail installation direction are bored on both sides of the rail fastening seat surface 2 of the concrete sleeper 1, and the lower end openings of the bolt insertion holes 3 are made. An anchor plate insertion hole 4 penetrating through the other side is bored in one side of the corresponding concrete sleeper 1, and an anchor plate 5 is fitted into the anchor plate insertion hole 4.

After inserting it in a predetermined position, that is, right below the bolt insertion hole 3, an anchor bolt with a T-shaped base 6a, that is, a T bolt 6, is inserted into the bolt insertion hole 3, and then , a rail holding fitting 7, a leaf spring 8, etc. are fitted to the tip of the T-bolt 6 protruding from the top surface of the concrete sleeper 1, and a nut 9 is fitted to the threaded portion 6b carved in the tip of the T-bolt 6. The rails 10 are fastened by screwing them together and tightening the nuts 9.

In the figure, reference numerals 11 and 12 are spiral reinforcing bars for reinforcing the surroundings of the bolt insertion holes 3 and anchor plate insertion holes 4 of the concrete sleeper 1, 13 is a track pad, 14 is a circular spring, 15 is an insulating collar, and 16 is a It is a pressure pad.

(Problems to be Solved by the Present Invention) However, in the conventional method, as shown in FIG. Not only is there a fitting portion 18. for fitting the base portion 6a of the T-bolt 6. Alternatively, when connecting the rail, the T
A stopper part 19 must be formed to prevent the bolt 6 from rotating in the direction of tightening the nut 9, resulting in a complicated shape and large size, which increases material and manufacturing costs. It becomes expensive.

Moreover, since the anchor plate 5 is large,
Since the cross-sectional area of the anchor plate insertion hole 4 into which the anchor plate 5 is fitted must be made large, there is a problem that the strength of the concrete sleeper 1 is reduced. It has to become something.

In addition to the T-bolt method mentioned above, there are other rail fastening devices such as a tapered bolt method and a built-in plug method (not shown), but they all use expensive materials and their parts are expensive. Since it is directly buried and fixed to the concrete sleeper when forming the concrete sleeper, it is not only difficult to replace parts, but also when fastening, the fastening force is slightly reduced compared to the T-bolt method due to deformation of the anchor side. There is a problem.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and can be provided at a low cost with a simple structure.Moreover, the present invention can weaken the fastening force of the rail, and can reduce the strength of concrete sleepers. It is an object of the present invention to provide a structure for fixing the base of an anchor bolt, which reduces the influence and allows parts to be easily replaced.

(Means for Achieving the Object) Therefore, in the present invention, the anchor bolt base fixing structure has an anchor plate insertion hole formed in a semicircular shape with an upwardly arcuate cross-sectional shape, and the anchor plate The anchor plate has a smaller inner diameter on one side than the other side than the predetermined position where the anchor plate is inserted, and the anchor plate is attached with a steel plate so that the anchor plate is in close contact with the arcuate inner surface of the anchor plate insertion hole. The anchor bolt is curved into a semicircle having a concentric circle with the plate insertion hole, and a long bolt insertion hole is drilled in the center of the upper part along the rail installation direction, and the base of the anchor bolt is formed into a T-shape. west,
Opposing surfaces of both ends of the horizontal portion forming the T-shape are formed in an arc shape so that when the horizontal portion is rotated to a position perpendicular to the rail installation direction, the opposing surfaces are in close contact with the inner surface of the anchor plate. , and at one corner on a diagonal line corresponding to the direction in which the nut is tightened, at both ends of the horizontal portion, there is a notch that allows the anchor bolt to rotate within a range of approximately 90 degrees between the inserted state and the locked state. The intended purpose is achieved by creating a structure in which

(Function) With the above configuration, during rail fastening work, the T-shaped base of the anchor bolt is inserted into the bolt insertion hole along the elongated bolt insertion hole, and ,
After inserting the anchor plate into the predetermined position of the anchor plate insertion hole in advance, if the anchor bolt is rotated approximately 90 degrees in the direction of tightening the nut, the horizontal part of the base of the anchor bolt will be aligned with the anchor. Since it is formed in an arc shape similar to the inner surface of the plate, it becomes concentric with the inner surface of the anchor plate at this position, and further rotation is prevented.

Therefore, if you set the rail holder, leaf spring, etc. in this state and tighten the nut, the horizontal part of the base of the anchor bolt will come into close contact with the inner surface of the anchor plate, and the anchor bolt will not rotate. Rail connection becomes possible.

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

a is a concrete sleeper, and the concrete sleeper a
A rail fastening seat surface 21 having a concave shape along the rail laying direction is formed on the rail b, and a rail b
is placed so that Further, at both ends of the rail fastening seat surface 21, there are spring seat surfaces 23 formed in a step shape.
The side wall 23a of the spring seat surface 23 and the side wall 21a of the rail fastening seat surface 21 serve as lateral pressure receiving surfaces.

C is a rail fastening device, which includes a rail presser 24° and a plate spring 25. Washer 26. It consists of a nut 27 and a T-bolt 28, which is an anchor bolt whose lower half is inserted and erected through the concrete sleeper a, and between the rail presser 24 and the hem 29 of the rail b, an elastic material such as rubber is inserted. An insulating plate 30 is interposed. Further, the plate spring 25 is connected to the rail presser 24.
and the spring seat surface 23 of the concrete sleeper a.

Note that the rail fastening device 5 is not limited to that of the embodiment described above, but may be of a conventional structure as shown in FIG.

Bolt insertion holes 31 through which the lower half of the T-bolt 28 is inserted are bored on both sides of the rail mounting portion of the rail fastening seat surface 21. The bolt insertion hole 31 is formed in a long hole shape along the rail installation direction so that the horizontal portion 32 of the T-shaped base of the T-bolt 28 can be inserted therethrough. In order to be able to swing in a direction perpendicular to the rail installation direction, the width gradually increases in the left-right direction from the lower end opening toward the upper surface opening.

Further, an anchor plate insertion hole 33 communicating with the lower end opening of the bolt insertion hole 31 is bored at a position corresponding to the bolt insertion hole 31 on the side surface of the concrete sleeper a. The anchor plate insertion hole 33 is formed in a semicircular shape with an upwardly arcuate cross section, and is penetrated in the front-rear direction along the rail installation direction.
Moreover, one side of the anchor plate 34 is gradually made smaller in diameter toward the opening from the predetermined position where the anchor plate 34 is inserted, and when the anchor plate 34 is inserted from the other side of the anchor plate insertion hole 33, the diameter of the anchor plate 34 is gradually reduced at the predetermined position. It is designed to be locked.

In the embodiment, the diameter of one side of the anchor plate insertion hole 33 is gradually reduced toward the opening, but the present invention is not limited to this, and a stepped portion may be formed on one side of a predetermined position where the anchor plate 34 is inserted. However, the stepped portion may have a small diameter parallel to the opening.

When the anchor plate 34 is connected to the rail,
It is formed of a steel plate and curved into a semicircle having a concentric circle with the anchor plate insertion hole 33 so as to be in close contact with the arcuate inner surface of the anchor plate insertion hole 33,
An elongated bolt insertion hole 35 is bored in the center of the upper part along the rail installation direction.

As described above, the T-bolt 28 has a T-shaped base, and both ends of the horizontal portion 32 forming the T-shape extend perpendicularly to the rail laying direction. position, that is, when rotated in a direction perpendicular to the bolt insertion hole 35 of the anchor plate 34,
The surface facing the inner surface of the anchor plate 34 is formed in an arc shape with concentric circles so as to be in close contact with the inner surface of the anchor plate 34 when the rail is fastened, and the nuts at both ends of the horizontal portion 32 The T-bolt 28 is tightened at one corner on the diagonal line corresponding to the direction, from the inserted state, that is, the state where the horizontal part 32 is parallel to the rail laying direction, to the locked state, that is, the bolt of the anchor plate 34. A notch 32a is formed that allows rotation within a range of approximately 90 degrees between the states intersecting the insertion hole 35 at right angles.

In the embodiment, the cutout portion 32a has an arc shape, but the cutout portion 32a is not limited to this, and may be cut out linearly.

(Effects of the Present Invention) As described above, according to the present invention, the anchor plate insertion hole is formed in a semicircular shape with an upwardly arcuate cross section, and the anchor plate is inserted into the predetermined hole. The inner diameter of one side of the anchor plate is made smaller than the inner diameter of the other side, and the anchor plate is formed in a concentric circle with the anchor plate insertion hole using a steel plate so that the anchor plate is in close contact with the arcuate inner surface of the anchor plate insertion hole. The anchor bolt is curved in a semicircular shape, and a long bolt insertion hole is bored in the center of the upper part along the rail installation direction, and the base of the anchor bolt is T-shaped. When the horizontal portion is rotated to a position perpendicular to the rail installation direction, opposing surfaces thereof are formed in an arc shape so as to come into close contact with the inner surface of the anchor plate, and At both ends of the horizontal portion, a notch is formed at one corner on a diagonal line corresponding to the direction in which the nut is tightened, allowing the anchor bolt to rotate within a range of approximately 90 degrees between the inserted state and the locked state. Due to its structure, it can be used during rail fastening work.

The T-shaped base of the anchor bolt was inserted into the elongated bolt insertion hole along the bolt insertion hole, and the anchor bolt was inserted into the anchor plate insertion hole at a predetermined position in advance. After passing through the anchor plate, if the anchor bolt is rotated approximately 90 degrees in the nut tightening direction, it will become concentric with the inner surface of the anchor plate at that position.

Further rotation is prevented. Therefore, if you set the rail holder, leaf spring, etc. in this state and tighten the nut, the horizontal part of the base of the 5 anchor bolt will come into close contact with the inner surface of the anchor plate, and the anchor bolt will fasten the rail without rotating. can do. Moreover, since the anchor bolts and anchor plates do not deform when the rail is fastened, the fastening force is not reduced.
Can be firmly fastened.

Furthermore, according to the present invention, unlike conventional anchor plates, there is no need to form a part of a stopper or a fitting part, so after drilling bolt insertion holes in a steel plate, a simple bending process is performed. Since only a small amount is required, material costs and processing costs can be significantly reduced. Moreover, since the anchor plate can be made smaller than conventional products, the cross-sectional area of the anchor plate insertion hole drilled in the concrete sleeper can be reduced, which reduces the effect on the strength of the concrete sleeper. be able to.

Furthermore, according to the present invention, the inner diameter of one side of the anchor plate insertion hole from the predetermined position where the anchor plate is inserted is made smaller than the inner diameter of the other side, so that the anchor plate can be easily positioned.

This has the advantage that even if the anchor plate deteriorates, it can be easily replaced.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of a rail fastening device showing the anchor bolt base fixing structure according to the present invention, Fig. 2 is an enlarged plan view of the main parts of the same, and Fig. 3 is an enlarged side view of the main parts of the same. Figure 4 is an enlarged perspective view of the base of the anchor bolt, Figure 5 is an enlarged perspective view of the base of the anchor bolt.
The figure is an enlarged perspective view of an anchor plate, Figure 6 is an enlarged perspective view of a concrete sleeper showing the relationship between bolt insertion holes and anchor plate insertion holes, and Figure 7 is a rail fastening device showing a conventional anchor bolt base fixing structure. FIG. 8 is an enlarged perspective view of the base of a conventional anchor bolt, and FIG. 9 is an enlarged perspective view of the conventional anchor plate seen from the bottom side. a is a concrete sleeper, b is a rail, C is a rail fastening device, 24 is a rail holder, 25 is a leaf spring, 27 is an oak! −
128 is a T bolt, 31 is a bolt insertion hole, 32 is a horizontal portion of the 'r bolt 28, 32a is a notch 5, 33 is an anchor plate insertion hole, and 34 is an anchor plate.

Claims (1)

[Claims] 1. An anchor plate insertion hole is bored in the side surface of the concrete sleeper along the rail installation direction, and an anchor plate is inserted into the center of the anchor plate insertion hole, and
A bolt insertion hole communicating with the anchor plate insertion hole is drilled from the top surface of the concrete sleeper, and the bolt insertion hole is formed in a long hole shape along the rail installation direction. The base of the anchor bolt is engaged with the anchor plate by inserting the lower half of the anchor bolt into the concrete sleeper and rotating the anchor bolt approximately 90 degrees in the nut tightening direction. The rail is secured by fitting a rail holder to the tip protruding from the top surface, screwing a nut into the threaded part cut into the tip of the anchor bolt, and tightening the nut using a leaf spring or the like. In a T-bolt type rail fastening device, the anchor plate insertion hole is formed in a semicircular shape with an upwardly arcuate cross-section, and is located at a predetermined position into which the anchor plate is inserted. The inner diameter of one side is smaller than the inner diameter of the other side, and the anchor plate has a concentric circle with the anchor plate insertion hole made of a steel plate so as to be in close contact with the arcuate inner surface of the anchor plate insertion hole. The anchor bolt is curved in a semicircular shape, and a long bolt insertion hole is bored in the center of the upper part along the rail installation direction, and the base of the anchor bolt is T-shaped. Both ends of the horizontal portion forming the T-shape have opposing surfaces formed in an arc shape so as to come into close contact with the inner surface of the anchor plate when the horizontal portion is rotated to a position perpendicular to the rail installation direction, Further, at one corner on a diagonal line corresponding to the nut tightening direction at both ends of the horizontal portion, a notch is formed to allow the anchor bolt to rotate within a range of approximately 90 degrees between an inserted state and a locked state. An anchor bolt base fixing structure in a rail fastening device, characterized in that: