JP2017082400A - Railroad tie fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a railroad tie fastener of which a fastening parts is rarely loosened, and capable of fastening a bridge girder and a railroad tie even when a bracing is spanned over a plurality of railroad ties, with the bracing fitted thereon.SOLUTION: A railroad tie fastener is for fixing a railroad tie (110) on a bridge girder (120). The railroad tie fastener includes: a hook member (10) having a long part bent in an inverted U-shape, and a first hook part (12) and a second hook part (13) provided respectively on two tip parts of the long part; and a spring body (20). The bridge girder (120) and the railroad tie (110) are fastened, when the railroad tie (110) is installed to intersect with the bridge girder (120), by having the long part cross over the railroad tie (110), the first hook part (12) hooked on the bridge girder (120) below one side of the railroad tie, the second hook part (13) hooked on the bridge girder (120) below the other side of the railroad tie, and the spring body (20) energize to separate a top surface of the railroad tie (110) from the long part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sleeper fastener for fastening a sleeper to a bridge girder.

In railway bridges, sleepers are fastened to the bridge girders to provide rails. As a conventional fastener for fastening a sleeper to a bridge girder, there is a J-shaped hook bolt having a hook portion at a lower portion. The sleeper is provided with a through-hole that extends vertically, and when fastening, a hook bolt is passed from below through the sleeper's through-hole, and a nut is screwed onto the top of the hook bolt while the hook part of the hook bolt is caught by the bridge girder. Is done. By tightening the nut, the bridge girder is sandwiched between the hook portion and the sleeper, and the bridge girder and the sleeper are fastened.
Patent Literature 1 proposes a fastening bracket that can fasten a sleeper to a bridge girder without providing a through hole in the sleeper. This fastening metal fitting has a connecting frame formed of a steel material in a ring shape, and an upper spring and a lower spring that engage with the connecting frame. The ring-shaped connecting frame is passed from one end of the sleeper to the fixed position so that the sleeper passes through the central space of the center, the lower spring engages with the connecting frame and the bridge girder under the sleeper, and the upper spring is the sleeper. A biasing force is applied to the sleepers and the connecting frame at the top. With these, the sleepers are fastened to the bridge girder.

Japanese Utility Model Publication No. 06-024001

In the method of fastening sleepers using hook bolts, the nut may be loosened due to vibration when passing through the train. If the nut is left loose, the nut may come off the hook bolt and the hook bolt may fall. For this reason, when hook bolts are used, it is necessary to perform a maintenance to inspect whether the nuts are loosened by periodic inspection, and to retighten the nuts if they are loosened.
According to the fastening metal fitting of patent document 1, it is hard to generate | occur | produce in a fastening part compared with a hook bolt. However, in the fastening metal fitting of patent document 1, it is necessary to let a ring-shaped connection frame pass from one end of a sleeper to a fixed position at the time of fastening work. In order to maintain the space | interval with an adjacent sleeper at the edge part of a sleeper, a joint material may be fixed so that it may be spanned over several sleepers (refer the joint material 130 of FIG. 1 and FIG. 2). If there is a joint material, the connecting frame cannot be passed from one end of the sleeper to the fixed position. For this reason, in the connection metal fitting of patent document 1, when there exists a joint material, there exists a subject that fastening of a sleeper must be performed after removing a joint material once.

  An object of the present invention is to provide a sleeper fastener that is capable of fastening a bridge girder and a sleeper while keeping the joint material even if there is a joint material that spans a plurality of sleepers and is less likely to loosen the fastening portion. It is said.

In order to achieve the above object, the present invention
A sleeper fastener for fixing a sleeper to a bridge girder,
A hook member having a long portion bent in an inverted U shape, and a first hook portion and a second hook portion respectively provided at two ends of the long portion;
A spring body,
For the sleepers installed so as to cross the bridge girder, the long part straddles the sleeper, the first hook part is caught on the bridge girder below one side of the sleeper, and the second hook part is the sleeper. It is configured so that the bridge girder and the sleeper are fixed by being hooked on the bridge girder below the other side of the frame and urging the spring body to separate the upper surface of the sleeper and the long portion. It is a feature.

According to this configuration, the hook member sandwiches the bridge girder and the sleepers by the urging force of the spring body and fastens them together. Therefore, compared with the case where a hook bolt is used, the fastening portion is less likely to loosen, and the periodic inspection can be reduced. Furthermore, since the hook member is installed so that the long part bent in an inverted U shape straddles the sleepers, the fastening work can be performed without removing the joints even if the joint members are fixed to the sleepers. Further, the hook member is difficult to fall below the sleepers.
Here, the sleeper fastener described above may further include a first stopper that is fixed to an upper portion of the spring body and prevents the long portion from shifting in the longitudinal direction of the sleeper.
According to this structure, it is prevented that the hook member which fixed the sleeper and the bridge is detached from the spring body. This can also reduce regular inspections.

Furthermore, the above sleeper fasteners
A spring receiver that is fixed to the upper surface of the sleeper and receives the spring body;
The spring receiver may be provided with a second stopper that abuts against the long portion at a side of the sleeper and prevents the long portion from shifting in the longitudinal direction of the sleeper.
According to this configuration, the first stopper and the second stopper prevent the hook member from being displaced at a plurality of locations on the spring body and below the spring body. Therefore, the resistance can be increased even with respect to vibration or force that changes the fixing angle of the hook member. Therefore, a firm fixation capable of resisting such vibration or force is obtained. In addition, regular inspections can be reduced by these.
Furthermore, the spring body, the first stopper, and the spring receiver may be combined with each other by fitting and separable from each other.
According to this configuration, it is possible to reduce the bulk of the component and improve the transportability of the component.

  According to the present invention, there is provided a sleeper fastener that is capable of fastening a bridge girder and a sleeper with a joint attached even when there is a joint that spans a plurality of sleepers and is less likely to loosen a fastening portion. Can do.

It is a side view which shows the fastening structure using the sleeper fastener of 1st Embodiment of this invention. It is a top view which shows the fastening structure of FIG. It is a front view of the partial cross section which shows the fastening structure of FIG. It is a separate perspective view which shows a spring receiver, a spring body, and a stopper member. It is a side view which shows the fastening structure of the sleeper fastener to which the spring body of a modification is applied. It is arrow AA sectional view taken on the line of FIG. It is a side view which shows the fastening structure using the sleeper fastener of 2nd Embodiment of this invention. It is a top view which shows the fastening structure of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a side view showing a fastening structure using the sleeper fastener according to the first embodiment of the present invention. FIG. 2 is a plan view showing the fastening structure of FIG. FIG. 3 is a partially sectional front view showing the fastening structure of FIG. 1. FIG. 4 is an exploded perspective view showing the spring receiver, the spring body, and the stopper member.
As shown in FIGS. 1 to 3, the sleeper fastener according to the first embodiment of the present invention fastens a sleeper 110 and a bridge girder 120 to provide a rail 100 in a railway bridge. The sleepers 110 are installed so as to cross the bridge girder 120, and a joint member 130 for maintaining the interval between the sleepers 110 is fixed near the ends of the sleepers 110. The joint material 130 is stretched over a plurality of adjacent sleepers 110 and fixed.

As shown in FIGS. 1 to 4, the sleeper fastener according to the first embodiment includes a hook member 10, a spring body 20, a spring receiver 30, a stopper member 40, and a height adjustment plate 50. Yes.
The hook member 10 is made of a steel material, and has a long portion bent in an inverted U shape, and a first hook portion 12 and a second hook portion 13 provided at two tip portions of the long portion, respectively. As shown in FIG. 3, the inverted U-shaped long portion has a shape extending along the upper surface and the left and right side surfaces of the sleeper 110 across the sleeper 110. The two legs of the long portion extending along the left and right side surfaces of the sleeper 110 have a length that allows the tip to reach the bridge girder 120.
As shown in FIG. 1, the first hook portion 12 is provided at one end portion of the long portion and has a shape bent in a key shape. The 2nd hook part 13 is provided in the other front-end | tip part of a long part, and has the shape bent in the key shape. The 1st hook part 12 and the 2nd hook part 13 have the shape bent in the direction with the bridge girder 120 among the longitudinal directions of the sleeper 110, respectively.

The spring body 20 is, for example, a U-shaped spring and is interposed between the upper surface of the sleeper 110 and the hook member 10 and biases the hook member 10 in a direction away from the upper surface of the sleeper 110.
The spring body 20 has a bolt insertion portion 21 for displacing the spring in a direction to contract the spring by a bolt, a fitting hole 22 for fitting the stopper member 40, and a convex portion for fitting the spring receiver 30. 23 (see FIG. 4).
The stopper member 40 is a member that locks the hook member 10 so as not to be displaced in the longitudinal direction of the sleeper 110. The stopper member 40 has a groove portion 41 for locking the long portion of the hook member 10 at the upper portion, and a convex portion 42 for fitting into the fitting hole 22 of the spring body 20 at the lower portion (see FIG. 4). reference). The stopper member 40 is fixed to the upper part of the spring body 20.
In addition, the height of the convex part 42 of the stopper member 40 is made larger than the thickness of the upper surface part of the spring body 20, and a horizontal hole is provided in a part that penetrates the fitting hole 22 of the convex part 42 to prevent the convex part 42 from coming off. You may comprise so that the pin of this can be inserted.

The spring receiver 30 is a member that is fixed to the upper surface of the sleeper 110 and receives one end of the spring body 20. In the spring receiver 30, a plate portion fixed to the upper surface of the sleeper 110 is provided with an insertion hole 34 for inserting the fixing nail 33, a fitting hole 35 for fitting with the convex portion 23 of the spring body 20, and the spring body 20. Bolt holes 31 are provided to be used when shrinking. Further, the spring receiver 30 is provided with a stopper 32 at a portion protruding to the side of the sleeper 110 so as to contact the hook member 10 and prevent the hook member 10 from being displaced in the longitudinal direction of the sleeper 110. The stopper 32 is configured to abut against the hook member 10 from both sides in the longitudinal direction of the sleeper 110 to lock the hook member 10. However, the stopper 32 is configured to abut against the hook member 10 from only one longitudinal side of the sleeper 110. Also good. For example, if there is a possibility that the first hook portion 12 and the second hook portion 13 are displaced in a direction away from the bridge girder 120 and there is almost no possibility of displacement in the opposite direction, a possible displacement is possible. The stopper 32 may be provided only on one side so as to be prevented.
The height adjustment plate 50 is a plate that adjusts the position in the height direction of the hook member 10 and the spring body 20 in accordance with the tolerance of the thickness of the sleeper 110 or the tolerance of the thickness of the bridge girder 120.

<Fastening method>
Then, the fastening method of the sleeper 110 using the sleeper fastener of the said structure is demonstrated.
The sleepers 110 are assumed to be placed so as to cross the bridge girder 120 in advance. In addition, it is assumed that the joint material 130 is fixed near the end of each sleeper 110 so as to be bridged over a plurality of adjacent sleepers 110.
During the fastening operation, the worker assembles the spring receiver 30, the spring body 20, and the stopper member 40 at a predetermined position of the sleeper 110. At this time, the projection 23 of the spring body 20 is fitted into the fitting hole 35 of the spring receiver 30, and the projection 42 of the stopper member 40 is fitted into the fitting hole 22 of the spring body 20. Further, if necessary, the worker arranges the height adjusting plate 50 between the spring receiver 30 and the sleepers 110.
Next, the worker passes the bolt through the bolt insertion part 21 of the spring body 20 and screws it into the bolt hole 31. Then, the spring body 20 is compressed by tightening the bolt.

Subsequently, the worker installs the hook member 10 so as to straddle the sleeper 110 from above the sleeper 110. At this time, the long portion of the hook member 10 is locked to the groove portion 41 (FIG. 4) of the stopper member 40 and the stopper 32 of the spring receiver 30. In addition, the first hook portion 12 and the second hook portion 13 of the hook member 10 are in a state of being caught by the bridge girder 120.
When the hook member 10 is set in this way, the worker loosens and removes the bolt that has contracted the spring body 20. Thereby, the urging force of the spring body 20 is transmitted to the hook member 10, the hook member 10 sandwiches the sleeper 110 and the bridge girder 120, and the sleeper 110 and the bridge girder 120 are fastened. In addition, after the operator loosens and removes the bolt, or before that, the operator hits the fixing nail 33 to fix the spring receiver 30 to the sleeper 110. These complete the fastening operation.

(Modification)
FIG. 5 is a side view showing a fastening structure of a sleeper fastener to which a spring body according to a modification is applied. 6 is a cross-sectional view taken along the line AA in FIG.
As shown in FIGS. 5 and 6, the spring body according to the present invention is not limited to the U-shaped spring, and springs of various structures such as the spring mechanism 20 </ b> A can be employed. The spring mechanism 20A shown in FIGS. 5 and 6 includes a plurality of disc springs 202, and an upper housing 201 and a lower housing 203 that can slide up and down. The plurality of disc springs 202 are accommodated inside the upper housing 201 and the lower housing 203, and exert an urging force in a direction in which the upper housing 201 and the lower housing 203 are separated when pressed. Two spring mechanisms 20A are provided in parallel in the lateral direction of the sleeper 110 (longitudinal direction of the bridge beam 120), like the spring body 20 shown in the plan view of FIG.
Further, the upper housing 201 is integrated with a stopper member 40 </ b> A for locking the hook member 10. The stopper member 40A has the same configuration as the stopper member 40 of FIG. 4, and the long portion of the hook member 10 is locked by the groove portion 41A. Note that the spring mechanism 20A and the stopper member 40A may be configured separately and combined with each other by fitting.

When the spring mechanism 20A according to the modified example is employed, a structure capable of pressing the spring mechanism 20A in parallel from above may be employed as a structure for contracting the spring mechanism 20A during fastening work. As such a structure, a plurality of bolt holes 31A, 31A (see FIG. 5) are provided in the spring receiver 30, and a plurality of bolts screwed into these are connected by a jig, and this jig is a spring mechanism. A structure for pressing 20A can be adopted.
Even if such a spring mechanism 20A is used, the sleeper 110 can be similarly fixed to the bridge girder 120 by the hook member 10.

  As described above, according to the sleeper fastener of the first embodiment, the hook member 10 sandwiches the bridge beam 120 and the sleeper 110 and fastens them together by the urging force of the spring bodies 20 and 20A. Therefore, compared with the case where a hook bolt is used, the fastening portion is less likely to be loosened, and therefore regular inspection can be reduced. Further, since the hook member 10 is installed so that the long portion bent in an inverted U shape straddles the sleeper 110, even if the joint member 130 is fixed to the sleeper 110, the fastening operation is not performed. It can be performed. Further, the hook member 10 is unlikely to fall below the sleepers 110.

(Second Embodiment)
FIG. 7: shows the side view of the fastening structure using the sleeper fastener which concerns on 2nd Embodiment of this invention. FIG. 8 shows a plan view of this fastening structure.
The sleeper fastener according to the second embodiment is mainly different from the sleeper fastener according to the first embodiment, except that the sleeper fastener according to the second embodiment includes a mechanism that prevents the parts from being separated after the parts are assembled. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
Although not particularly limited, in FIGS. 7 and 8, a reinforcing plate is fixed on the flange of the bridge girder 120 using a rivet R, and a sleeper pedestal 111 for avoiding the rivet R between the sleeper 110 and the bridge girder 120. Is provided.

The sleeper fastener according to the second embodiment is provided with a stopper 60 that suppresses the displacement of the hook member 10 above the spring body 20 as a component different from the first embodiment. The stopper 60 according to the second embodiment has a function of not only preventing displacement of the hook member 10 in the longitudinal direction of the sleeper 110 but also inhibiting upward displacement of the hook member 10. Specifically, the stopper 60 includes a lower member 60a that receives a portion of the hook member 10 that straddles the sleepers 110 from below, and an upper member 60b that receives from above. The upper member 60b and the lower member 60a are coupled to each other by a fixture 61 such as a bolt. The lower member 60a and the upper member 60b each have a groove formed along a portion of the hook member 10 that straddles the sleeper 110, and the hook member 10 has a groove between the groove of the lower member 60a and the groove of the upper member 60b. It is locked so that a part fits. As such a groove, for example, a groove having a size and a shape for locking the hook portion 10 so that the hook member 10 can swing around an axis extending along the groove may be employed.
According to such a stopper 60, even when the hook member 10 is not caught on the bridge girder 120 and an upward repulsive force is generated on the hook member 10, the hook member 10 may be disengaged from the stopper 60. Can be prevented.

The sleeper fastener according to the second embodiment is further provided with a dead bolt receiver 63 that makes it unnecessary to remove the bolt 62 for displacing or returning the spring body 20 in the contracting direction. The bolt receiver 63 is disposed below the bolt insertion portion 21 of the spring body 20 and joined to the spring receiver 30 by welding or the like. A screw hole having a length sufficient to contract the spring body 20 is provided in a portion of the bolt receiver 63 below the bolt insertion portion 21, and the bolt 64 is screwed with a nut 64 interposed therebetween.
According to such a bolt receiver 63, by rotating the bolt 62 in a direction to enter the screw hole, the head of the bolt 62 is locked to the bolt insertion hole 21 of the spring body 20, and the upper portion of the spring body 20 is The spring body 20 is compressed by pressing in the pulling-down direction. In this state, the hook member 10 can be set. After the hook member 10 is set, the bolt 62 is rotated in a direction to withdraw from the screw hole, whereby the compression of the spring body 20 by the bolt 62 is released, and the urging force of the spring body 20 is transmitted to the hook member 10. Here, the nuts 64 can be tightened to fix the bolts 62 to the bolt receivers 63. Thereby, the bolt 62 can be kept attached. In addition, by fixing the bolt 62 in this way, even if the hook member 10 is not caught on the bridge girder 120 and the compression of the spring body 20 by the hook member 10 is released, the bolt 62 is fixed to the spring body. It is possible to prevent the repulsive force of the spring body 20 from being largely released by engaging with the 20 bolt insertion holes 21 to suppress a large displacement of the spring body 20.

  The sleeper fastener of the second embodiment is further provided with a configuration that prevents the spring body 20 and the stopper 60 from being disengaged. As a configuration for engaging the spring body 20 and the stopper 60, a fitting hole is formed on the upper part of the spring body 20, similarly to the fitting hole 22 and the convex portion 42 (see FIG. 4) of the first embodiment. A configuration in which a convex portion is provided on the bottom of the stopper 60 and these are fitted can be employed. As a convex part, it is good also as a shape whose cross section becomes a rectangle, and good also as a column shape. And as a structure which prevents these engagements from being released, the structure which engages the retaining ring C or the removal prevention pin etc. at the front-end | tip of the convex part which passed the fitting hole is employable.

  Similarly, the sleeper fastener of the second embodiment is provided with a configuration that prevents the spring body 20 and the spring receiver 30 from being disengaged. As a configuration for engaging the spring body 20 and the spring receiver 30, the fitting hole 35 and the projection 23 (see FIG. 4) of the first embodiment are opposite to the fitting hole in the lower part of the spring body 20. The structure which provides a convex part in the upper surface of the spring receiver 30, and fits these can be employ | adopted. As a convex part, it is good also as a shape whose cross section becomes a rectangle, and good also as a column shape. In order to prevent the engagement from being released, it is possible to employ a structure in which a retaining ring C or a removal prevention pin is engaged with the tip of the convex portion that has passed through the fitting hole.

As described above, according to the sleeper fastener of the second embodiment, even if the hook member 10 is not caught on the bridge girder 120, the spring body 20 is prevented from being largely repelled. In addition, since the engagement of the hook member 10, the spring body 20, and the stopper 60 is maintained, it is possible to prevent the parts of the sleeper fastener from jumping out. Such an effect is exhibited in addition to the operational effects of the first embodiment.
Furthermore, in the sleeper fastener of the second embodiment, a stopper 32 </ b> A that contacts the hook member 10 only from one side in the longitudinal direction of the sleeper 110 is employed as the second stopper provided in the spring receiver 30. The stopper 32 </ b> A is provided near the end of the sleeper 110 than the hook member 10 in the vicinity of the place where the hook member 10 is disposed when the sleeper 110 and the bridge girder 112 are fastened. By this stopper 32A, the resistance force of the hook member 10 and the sleeper 110 can be increased with respect to the lateral force transmitted from the train to the sleeper 110.

  As mentioned above, although each embodiment of this invention was described, this invention is not limited to said embodiment. For example, the interval between the first leg portion and the second leg portion of the hook member 10 may be configured to be larger than the lateral width of the sleeper 110 (the width in the vertical direction on the paper in FIG. 8). Here, when the hook member 10 is set so as to straddle the sleeper 110, the part of the hook member 10 that is passed from the upper side to the lower side on one side of the sleeper 110 is the first leg part, and the other side of the sleeper 110 is viewed from the upper side. The part handed down is called the second leg. With this configuration, when the hook member 10 is set on the sleeper 110, the fixing position of the hook member 10 with respect to the sleeper 110 can be adjusted by changing it in the horizontal direction (the width in the vertical direction in FIG. 8). It becomes. Since the fixing position can be adjusted in the lateral direction in this way, even if the first hook portion 12 and the second hook portion 13 of the hook member 10 have a length that can reach the rivet r, The fixing position can be adjusted so that the two hook portions 13 do not interfere with the rivet r. Details shown in the embodiments can be changed as appropriate without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 10 Hook member 12 2nd hook part 13 1st hook part 20 Spring body 20A Spring mechanism 30 Spring support 32, 32A Stopper (2nd stopper)
40 Stopper member (first stopper)
50 Height adjustment plate 60 Stopper (second stopper)
60a Lower member 60b Upper member 62 Bolt 63 Bolt receiver C Retaining ring 100 Rail 110 Sleeper 120 Bridge girder 130 Joint material

Claims (4)

A sleeper fastener for fixing a sleeper to a bridge girder,
A hook member having a long portion bent in an inverted U shape, and a first hook portion and a second hook portion respectively provided at two ends of the long portion;
A spring body,
For the sleepers installed so as to cross the bridge girder, the long part straddles the sleeper, the first hook part is caught on the bridge girder below one side of the sleeper, and the second hook part is the sleeper. It is configured so that the bridge girder and the sleeper are fixed by being hooked on the bridge girder below the other side of the frame and urging the spring body to separate the upper surface of the sleeper and the long portion. Features sleeper fasteners.   The sleeper fastener according to claim 1, further comprising a first stopper that is fixed to an upper portion of the spring body and prevents the long portion from shifting in a longitudinal direction of the sleeper. A spring receiver that is fixed to the upper surface of the sleeper and receives the spring body;
The spring receiver is provided with a second stopper that abuts against the long portion at a side of the sleeper and prevents the long portion from shifting in the longitudinal direction of the sleeper. Item 5. A sleeper fastener according to item 2.   The sleeper fastener according to claim 3, wherein the spring body, the first stopper, and the spring receiver are combined with each other by fitting and separable from each other.

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