JP4845616B2 - Rail fastening device with cradle removal prevention mechanism - Google Patents

Description

  The present invention relates to a rail fastening device that fastens a rail to a bearing body such as a track slab or a concrete sleeper, and more particularly to a rail fastening device that prevents a cradle receiving lateral pressure from the rail from being pulled out and moved.

Conventionally, in a railway track using a support body such as concrete sleeper, a recessed seat surface having a shoulder inclined with respect to the longitudinal direction of the rail is provided on the upper surface of the support body, and a rail fastening device is arranged on this seat surface. The rail is fastened to the support body.
As such a rail fastening device, a spring clip support for mounting a spring clip (wire spring) that elastically presses the rail toward the support is fixed to the support by a fastening bolt, Some are provided in close contact with the shoulder side surface of the seating surface so as to receive the lateral pressure, and are provided with a cradle for contacting the rear portion of the spring clip support.
In addition, as another rail fastening device, a spring clip in which an intermediate portion of a leaf spring is bent in an arc shape is fixed to a support body by a fastening bolt, and a shoulder portion of a seating surface is received so as to receive lateral pressure from the rail. Some are provided in close contact with the side surface and include a cradle for contacting the rear portion of the spring clip (see Patent Document 1).

The cradle of these fastening devices is formed in a wedge shape, has an outer surface that is inclined along the inclined shoulder side surface of the bearing surface of the support body, and a rear portion of the spring clip or the spring clip support body. The contact surface is provided on the inner side so as to be parallel to the rail, and is moved along the side surface of the shoulder so that the distance between the rail and the cradle can be varied and adjusted according to the position of the rail.
Utility Model Registration No. 2511764

However, the train bolts loosen the fastening bolts securing the spring clip or spring clip support to the support body due to vibration transmitted to the fastening device via the rail, etc. The stand may come out.
Then, the lateral pressure from the rail cannot be received by the support body via the cradle, and the spring clip or the spring clip support hits the seat surface shoulder of the support body, and due to an impact or the like, the seat surface shoulder of the support body There is a problem that the part cannot be fixed or the lateral pressure acts directly on the fastening bolt, the fastening bolt or the embedded plug of the support body to which the fastening bolt is screwed is damaged, and the rail cannot be fixed. .
For this reason, since it is necessary to frequently check whether or not the cradle is pulled out and to return the cradle to an appropriate position, there is a problem that it takes time to perform the track maintenance work.

  Therefore, the present invention solves the above-described problem, that is, the object of the present invention is to prevent the movement of the cradle and prevent the rail fastening device from being damaged due to the withdrawal of the cradle. An object of the present invention is to provide a rail fastening device with a cradle prevention mechanism that can save track work.

  The present invention is a spring clip that elastically presses the rail toward a support body such as a concrete sleeper, a fastening bolt that fixes the spring clip or the spring clip support body to the support body, and the support body. A rail fastening device comprising a wedge-shaped cradle provided with a contact surface for contacting the rear portion of the spring clip or the spring clip support body, wherein the cradle is mounted with a rectangular stopper provided on the contact surface And a stopper that is detachably attached to the stopper mounting recess, the stopper having a rectangular parallelepiped shape having a longer side shorter than the longer side of the stopper mounting recess. A mounting portion; and a contact portion provided on a part of the upper surface of the mounting portion and contacting a side surface of the spring clip or the spring clip support. On both sides of the parts and the stopper mounting recess, in which chevron shaped engaging portion continuous engagement with each other by being formed respectively, it has solved the above problems.

The present invention includes a rectangular stopper mounting recess provided on a contact surface on which a cradle abuts a rear portion of a spring clip or a spring clip support, and a stopper that is detachably mounted in the stopper mounting recess. The stopper is provided with a rectangular parallelepiped mounting portion having a longer side shorter than the longer side of the stopper mounting recess and a part of the upper surface of the mounting portion, and a spring clip or a spring clip support. Since both the mounting portion and the stopper mounting recess are formed with continuous mountain-shaped engaging portions that engage with each other, the stopper cannot be moved. Because it is attached to the cradle and is in contact with the side of a spring clip or spring clip support that is fixed to a support body such as sleepers, the cradle is affected by vibration, etc. Even if the pressing force of the spring clip or the spring clip support is reduced, the cradle is prevented from coming out, so damage to the seat shoulder of the support body, destruction of the embedded plug, or destruction of the fastening bolt Can be prevented.
For this reason, it is not necessary to check whether or not the cradle is pulled out and to repair it, so that it is possible to save labor in the track maintenance work.
Further, since the long side of the stopper mounting portion is shorter than the long side of the stopper mounting recess, the mounting position can be easily adjusted to the position of the spring clip or the spring clip support.
Furthermore, since the contact portion of the stopper is provided on a part of the upper surface of the mounting portion, the spring clip and the support can be arranged so as to cover the flat portion of the mounting portion, and the stopper does not come out upward.

Embodiments of the present invention will be described below with reference to the drawings.
Here, FIG. 1 is a plan view of a railroad track in which a rail is fastened by a rail fastening device with a cradle prevention mechanism according to an embodiment of the present invention, and FIG. 2 is a railroad track partially shown in cross section. FIG. 3 is a perspective view of the cradle and the stopper of the present embodiment, and FIG. 4 is a cross-sectional view taken along the line AA of FIG.

As shown in FIGS. 1 and 2, the rail R placed on the concrete sleeper S via the rail pad P is fastened to the sleeper S by a pair of rail fastening devices 100, 100 with a cradle prevention mechanism, The rail fastening devices 100 and 100 are respectively disposed on a pair of recessed seat surfaces S1 and S1 provided on the sleeper S.
The rail fastening device 100 with a cradle removal prevention mechanism includes a spring clip 110 that elastically presses the rail R toward the sleeper S, a shoulder 120 that is a support for the spring clip 110, and the shoulder 120 fixed to the sleeper. And a wedge-shaped pedestal 140 that abuts the rear portion 124 of the shoulder 120 so as to receive the lateral pressure from the rail R through the spring clip 110 and the shoulder 120. It is arranged in close contact with the shoulder side surface S2 of the surface S1, and the lateral pressure from the rail R is received by the sleeper S via the cradle 140.
The cradle 140 is provided with a stopper mounting recess 146, and the stopper 150 is mounted in the recess 146 to constitute a cradle removal prevention mechanism.

  As shown in FIG. 1, the recessed seat surface S1 formed on the sleeper S has a shoulder side surface S2 formed on an inclined surface inclined with respect to the longitudinal direction of the rail R, and a wedge-shaped surface along the inclined surface. The cradle 140 is arranged to be movable.

The wedge-shaped cradle 140 has an outer surface 141 as an inclined surface along the inclined shoulder side surface S2 of the seating surface S1, and a contact surface 142 with which the rear portion 124 of the shoulder 120 contacts is parallel to the rail R. On the inside.
Accordingly, when the cradle 140 is moved along the shoulder 120 and the shoulder side surface S2 of the seat surface S1, the center of the fastening bolt mounting hole 123 of the shoulder 120 and the center of the embedded plug 170 of the seat surface S1 are arranged to be the same. Since the interval between the shoulder 120 and the cradle 140 is changed, the shoulder 120 is always attached so that the shoulder rear end surface 125 abuts against the abutment surface 142 of the cradle 140 by adjusting the position of the cradle 140. be able to.

  The spring clip 110 is formed of a linear spring member, and includes a linear attachment portion 111 attached to the shoulder 120, a linear shoulder contact portion 112 that makes contact with the upper surface of the shoulder 120, and a straight line that presses the rail bottom portion S1. The attaching part 111, the contact part 112, and the pressing part 113 are connected via the curved parts 114 and 115 so that it may become parallel, respectively.

The shoulder 120 is provided with a spring clip mounting hole 122 penetrating in the left-right direction so as to be parallel to the rail R and a fastening bolt mounting hole 123 penetrating from the upper surface toward the lower surface so as to be parallel to the rail R. The hole 123 is composed of an upper portion into which an attachment tool such as a hexagon socket wrench is inserted and a lower portion in which a female screw 123a is formed to attach the fastening bolt 130.
Further, the end surface 125 of the rear portion 124 is formed in an arc shape so as to contact the contact surface 142 of the cradle 140.
Then, from the upper surface of the shoulder 120, a hexagon socket wrench (not shown) is inserted into the fastening bolt mounting hole 123, fitted into the hexagonal hole 130 a provided on the upper surface of the fastening bolt 130, and rotated. The male screw 130b provided on the upper portion of the bolt 130 is screwed into the female screw 123a of the fastening bolt mounting hole 123 from the bottom surface to the top surface of the shoulder 120, and the shoulder 120 is attached to the fastening bolt 130.

When the shoulder 120 is fixed to the sleeper S with the fastening bolt 130 and the attachment portion 111 of the spring clip 110 is fitted into the spring clip attachment hole 122 of the shoulder 120, the shoulder contact portion 112 presses the shoulder 120 in the sleeper direction. The pressing portion 113 urges the rail bottom R1 toward the sleeper S via the insulator 160, thereby fastening the rail R to the sleeper S.
In this embodiment, the pressing portion 113 presses the rail bottom portion S1 via the insulator 160. However, the pressing portion 113 is brought into contact with the upper surface of the rail bottom portion S1 to directly press the rail bottom portion S1. May be.

The cradle 140 is provided with a cradle escape prevention mechanism that prevents the movement of the cradle 140, and this prevention mechanism is a rectangular stopper mounting recess 146 provided on the cradle 140 as shown in FIG. 3. And a stopper 150 that is detachably attached to the recess 146 and abuts against the side face 126 of the pedestal 140 on the reduced diameter side of the shoulder 120.
The contact surface 142 of the cradle 140 includes a flat portion 143, an arc portion 144, and a vertical portion 145, and the stopper mounting recess 146 is formed from the vicinity of the central portion of the flat portion 143 toward the reduced diameter portion. On both sides in the longitudinal direction, continuous mountain-shaped engaging portions 146a are formed.

The stopper 150 includes a rectangular parallelepiped mounting portion 151 mounted in the stopper mounting recess 146 and a contact portion 152 provided on the upper surface of the mounting portion 151 so as to contact the side surface of the shoulder 120. Yes.
On both sides of the mounting portion 151, a continuous mountain-shaped engaging portion 151 a is provided so as to engage with a continuous mountain-shaped engaging portion 146 a provided in the stopper mounting recess 146. The stopper 150 is mounted on the receiving base 140 so as not to move by being fitted to the other valley.
Further, the stopper 150 has a longer side of the mounting portion 151 shorter than the long side of the stopper mounting recess 146, and in this embodiment, it is less than half, and this change can be accommodated even if the shoulder 120 is changed. The mounting position can be changed freely.

The contact part 152 is provided on a part of the upper surface of the mounting part 151, and the other part is left as a flat part 151b.
In the present embodiment, a flat surface 151b is formed between one end portion of the upper surface of the mounting portion 151 and the central portion, and a contact portion 152 is provided from the central portion toward the other end portion. The contact portion 152 has a rectangular parallelepiped shape extending from the center portion beyond the other end portion, and protrudes from the center side of the lower portion 152a to form a shoulder contact surface 152b, and the lower end portion side as an inclined surface 152c. It is connected to the upper end surface of the mounting portion 151.
In addition, concave gripping parts 152d extending in the longitudinal direction are formed on both sides of the intermediate part so as to facilitate the mounting operation.
In the present embodiment, the shoulder contact surface 152c is provided below the contact portion 152, but it may be the entire shoulder contact side.

In the present embodiment, the male screw 130b at the upper part of the fastening bolt 130 is screwed into the female screw 123a of the shoulder 120 from the bottom of the shoulder 120, and the male screw 130c at the lower part of the fastening bolt 130 is screwed into the female screw 170a of the embedded plug 170. After the cradle 140 is moved along the side surface S2 of the depression S1, the stopper 150 is mounted on the stopper mounting recess 146, and at the same time, The stopper 150 is brought into contact with the side surface 126 of the shoulder 120 on the reduced diameter side 140.
Further, a hexagon socket wrench (not shown) is inserted into the fastening bolt mounting hole 123 of the shoulder 120 from the upper surface, and is fitted into the hexagonal hole 130a provided on the upper surface of the fastening bolt 130. The formed male screw 130 b is screwed to the female screw 123 a of the shoulder 120, and the male screw 130 c formed at the lower part of the fastening bolt 130 is screwed to the female screw 170 a of the embedded plug 170, and the shoulder 120 is attached to the sleeper S.
Next, when the insertion portion 111 of the spring clip 110 is inserted into the through hole 122 of the shoulder, the pressing portion 113 is arranged on the upper surface of the rail bottom portion R1, and the rail bottom portion R1 is pressed toward the sleeper S via the insulator 160 to R is fastened to sleeper S.

Then, as shown in FIG. 4, the stopper 150 is mounted in the stopper mounting recess 146 of the cradle 140 so that the stopper 150 cannot move, and the abutment surface 152 b of the abutment portion 152 is the side surface 126 of the shoulder 120 (the diameter of the cradle 140 is reduced). Since the abutment is in contact with the side surface of the cradle 140, the movement of the cradle 140 in the diameter increasing direction (left direction in the figure), that is, in the pull-out direction, is caused by the stopper 150 even if the pressing force against the cradle 140 is reduced. Therefore, it is regulated by the shoulder 120 fixed to the sleeper S and does not come out.
Further, since a flat portion 151b extending from the end portion to the contact portion 152 is provided on the upper surface of the mounting portion 151 of the stopper 150, the shoulder 120 is mounted so as to cover the flat portion 151b. Never get out

  In this embodiment, a wire spring is used as a spring clip and is supported by a shoulder. However, a spring clip having a bent middle portion of a leaf spring as described in Patent Document 1 may be used.

  As described above in detail, the rail fastening device with a cradle prevention mechanism according to the present invention includes a rectangular stopper mounting recess and a stopper that is detachably mounted in the stopper mounting recess. The stopper is provided with a rectangular parallelepiped mounting portion having a longer side shorter than the longer side of the stopper mounting recess and a part of the upper surface of the mounting portion, and a spring clip or a spring clip support. And a continuous mountain-shaped engaging portion that engages with each other on both sides of the mounting portion and the stopper mounting recess, respectively. Even if the pressing force decreases, the movement is prevented and the rail fastening device is prevented from being pulled out or damaged, and the track maintenance work can be saved. It is intended to achieve the.

The top view of the railroad track which fastened the rail with the rail fastening device with a cradle removal prevention mechanism which concerns on a present Example. The front view of the railway track which showed a part with a notch section. The perspective view of the cradle and stopper of a present Example. Sectional drawing shown by the AA line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Rail fastening device 110 with cradle removal prevention mechanism ... Spring clip 111 ... Mounting part 112 ... Shoulder contact part 113 ... Holding part 114, 115 ... Curved part 120 ... Shoulder 121 ... Front part 122 ... Spring clip mounting hole 123 ... Fastening bolt mounting hole 123a ... Female thread 124 ... Rear part 125 ... End face 126 ... Side face 130 ... Fastening bolt 130a ... Hexagonal hole 130b ... Upper male screw 130c ... Lower male screw 140 ... Wedge-shaped cradle 141 ... Outer 142 ... Abutment surface 143 ... Flat part 144 ... Arc part 145 ... Vertical part 146 ... Stopper mounting recess 146a ... Engagement part 150 ... Stopper 151 ... Mounting part 151 ... engaging part 151b ... flat part 152 ... abutting part 152a ... lower part 152b ... abutting surface 152c ... inclined surface 152d ... gripping part 160 ... insulator 170 .. Embedded plug 170a ... Female thread R ... Rail R1 ... Rail bottom S ... Concrete sleeper S1 ... Seat surface S2 ... Shoulder side

Claims (1)

A spring clip that elastically presses the rail toward a support body such as a concrete sleeper, a fastening bolt that fixes the spring clip or the spring clip support to the support body, and the spring clip or the spring clip disposed on the support body. In a rail fastening device comprising a wedge-shaped cradle provided with a contact surface for contacting the rear part of a spring clip support,
The cradle includes a rectangular stopper mounting recess provided on the contact surface, and a cradle removal prevention mechanism including a stopper detachably mounted in the stopper mounting recess,
The stopper is provided in a rectangular parallelepiped mounting portion having a longer side shorter than the longer side of the stopper mounting recess, and a part of the upper surface of the mounting portion, and abuts against a side surface of the spring clip or the spring clip support body. A cradle escape prevention mechanism comprising a contact portion, and continuous mountain-shaped engaging portions that engage with each other on both sides of the mounting portion and the stopper mounting recess. With rail fastening device.

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