JP2017095941A5 - - Google Patents

Description

Sleeper vibration isolator

  The present invention relates to a sleeper vibration isolator that is used for being semi-embedded and fixed to a roadbed while holding a sleeper.

  Conventionally, a pair of spaced-apart upright side walls and a bottomed box-shaped concrete sleeper receiving box with an upright end wall at one end and an open top are semi-embedded on a concrete roadbed or slab washer. Anti-vibration pads were interposed between the receiving box bottom plate and the sleeper bottom surface and between the upright end wall and the sleeper end face of the sleeper receiving box, and formed in the longitudinal direction of the inner surface of the upright side wall of the sleeper receiving box. 2. Description of the Related Art An apparatus for attaching a side pressure bearing vibration isolator to a concrete sleeper in which a wedge-shaped side pressure bearing vibration isolator member is wedged between an inclined surface that spreads upward and a side face of the sleeper is known (see, for example, Patent Document 1).

Japanese Patent No. 3736901 (in particular, refer to the claims, FIGS. 2 to 6).

  However, the conventional side pressure bearing vibration isolator mounting device described above has a vibration isolating pad interposed between the upright end wall and the sleeper end face of the sleeper receiving box, two left and right side pressure bearing vibration isolating members, and a bottom portion. Although the vibration-proof pad receives the load during train travel and suppresses vibrations of the sleeper, the long-term use causes the slight movement caused by the sleeper vibration to overlap, and the upright end wall and the sleeper end face of the sleeper receiving box The anti-vibration pad and the two lateral pressure bearing vibration isolator members inserted between the left and right sides are pulled out. As a result, the sleeper moves horizontally in the direction perpendicular to the rail, resulting in a trajectory error (the trajectory in the left-right direction). There is a troublesome problem that the anti-vibration effect may be lost due to the occurrence of floating or fluttering of the sleeper due to the occurrence of deviation) or the displacement of the side pressure bearing vibration-proofing member that controls the vertical movement of the sleeper. .

  Therefore, the present invention solves the problems of the prior art as described above, that is, the object of the present invention is to prevent the problem by attaching the end surface pad and the side surface pad to the vibration isolation case simply and reliably. Prevents the end pad and side pad from slipping out of the swing case, and suppresses the sleeper's lift and left / right movement that tend to occur due to the train's load to maintain a stable rail track for a long period of time. It is to provide a sleeper vibration isolator.

  The invention according to claim 1 includes a square case bottom plate, a pair of case upright side walls that are spaced apart from the case bottom plate, and a case upright end wall that is provided at one of the left and right edges of the case upright side wall. The anti-vibration case has a bottomed box shape that is configured so that the upper end of the sleeper is semi-embedded in the road bed with the end of the sleeper attached, and is interposed between the end of the sleeper and the case upright end wall. A sleeper vibration isolator comprising at least an end surface pad to be mounted, and a side pad interposed between the case upright side wall and a sleeper end, wherein the end surface pad is provided on the vibration isolating case. The problem mentioned above is solved by being fixed to the case upright end wall via a fastening means for retaining.

  The invention according to claim 2 is characterized in that, in addition to the structure of the sleeper vibration isolator described in claim 1, an engagement recess provided in the upper end portion on the side of the end face pad of the side face pad includes the end face pad. The above-described problems are further solved by engaging the engaging projection provided on the side pad side upper end portion of the side surface in the fitted state.

  In addition to the structure of the sleeper vibration isolator described in claim 2, the invention according to claim 3 includes a recess-side retaining inclined surface that extends from the recess opening end of the engagement recess toward the recess bottom end. The above-described problem is further solved by being disposed opposite to the convex-part-side retaining inclined surface that expands from the convex base end of the engaging convex part toward the convex part distal end.

  The invention according to claim 4 includes, in addition to the structure of the sleeper vibration isolator described in claim 3, a projecting protruding piece that is arranged to be opposed to the engaging convex part of the end surface pad. The above-described problem is further solved by positioning and holding the engaging concave portion of the side surface pad with respect to the engaging convex portion of the end surface pad.

  According to the fifth aspect of the present invention, in addition to the structure of the sleeper vibration isolator described in any one of the first to fourth aspects, the case upright side wall extends along an upper end portion of the case upright side wall. The above-mentioned problem is further solved by providing the flange-like inner ridge and the side pad provided with the engaging groove along the upper end portion of the side pad.

  In the invention according to claim 6, in addition to the structure of the sleeper vibration isolator described in claim 5, the engagement groove has a lower end portion of the hook-shaped inner ridge at the groove bottom of the engagement groove. By having the groove bottom protrusion to guide, the above-described problems are further solved.

  According to the seventh aspect of the present invention, in addition to the structure of the sleeper vibration isolator described in any one of the second to sixth aspects, the side pad is provided at a lower portion of the engagement recess. By having the mounting slit partly cut along the longitudinal direction of the pad, the above-mentioned problem is further solved.

  In addition to the structure of the sleeper vibration isolator described in claim 7, the invention according to claim 8 has the above-described problem in that the cut end portion of the mounting slit is formed in a circular shape. Is a further solution.

  According to a ninth aspect of the present invention, in addition to the structure of the sleeper vibration isolator according to any one of the first to eighth aspects, the end surface pad includes a case upright end wall of the vibration isolating case. The above-described problems are further solved by providing the shim plate with a shim plate.

In the sleeper vibration isolator according to any one of claims 1 to 9, the bottom surface pad of the invention according to claim 10 is laid on the case bottom plate of the vibration isolating case, The above-described problems are further solved.

The spacing material for a bottom surface of the invention according to claim 11 is the sleeper vibration damping device according to any one of claims 1 to 9, wherein the spacing material for the bottom surface is laid on a case bottom plate of the vibration isolation case. By arranging the pad on the case bottom plate of the vibration-proof case, the above-described problems are further solved.

  The sleeper vibration isolator of the present invention includes a square case bottom plate, a pair of case upright side walls spaced from the case bottom plate in an upright state, and a case upright end provided at one of the left and right edges of the case upright side walls. A bottomed box-shaped anti-vibration case that is configured so that the upper end of the sleeper is opened in the wall and is semi-embedded in the roadbed with the sleeper end attached, and between the sleeper end and the case upright end wall By including at least the interfacing end surface pad and the interfacing side pad between the case upright side wall and the sleeper end, it is possible to suppress vibration of the sleeper that supports the rail. In addition, the following specific effects can be achieved.

  According to the sleeper vibration isolator of the first aspect of the present invention, the end surface pad is fixed to the case upright end wall of the vibration isolating case via the retaining means for preventing the end surface pad. Since it is securely fixed to the case upright end wall of the vibration case, it is possible to completely prevent the end face pad from being lifted up or pulled out from the vibration isolation case, which tends to be caused by vibration when passing through the train.

  According to the sleeper vibration isolator of the invention of claim 2, in addition to the effect of the invention of claim 1, the engagement recess provided at the upper end portion on the end face pad side of the side face pad is provided with the end face pad. For the end face, the side pad is securely fixed to the case upright end wall of the vibration isolating case by engaging with the engaging convex part provided at the upper end portion of the side pad of the side face in a fitted state. Since the pad is concavo-convexly engaged, it is possible to prevent the side pad from being displaced in the longitudinal direction of the vibration isolating case or coming out.

  According to the sleeper vibration isolator of the invention according to claim 3, in addition to the effect of the invention according to claim 2, the recess side retaining inclination that expands from the recess opening end of the engaging recess toward the recess bottom end. Since the surface is disposed opposite to the convex-side slip-off preventing inclined surface that expands from the convex base end of the engaging convex portion toward the convex leading end, the pad for the side surface is caused by vibration generated when the train passes. Even if a lifting force is generated, the concave side locking ramps receive drag from the convex side locking ramps to suppress the lifting force generated on the side pads. Can be prevented and the side pad can be prevented from slipping upward.

  According to the sleeper vibration isolator of the invention according to claim 4, in addition to the effect of the invention according to claim 3, the protruding protruding piece that is arranged opposite to the engaging protrusion of the end surface pad and is continuously provided. However, since the engaging recess of the side surface pad is positioned and clamped with respect to the engaging protrusion of the end surface pad, the side surface pad is displaced in the sleeper longitudinal direction due to vibration generated when the train passes. Even if it is going to occur, the engagement convex part of the pad for the end face and the projecting protruding piece are positioned by sandwiching the engagement concave part of the pad for the side face, so Can be prevented.

  According to the sleeper vibration isolator of the invention according to claim 5, in addition to the effect of the invention according to any one of claims 1 to 4, the case upright side wall is the upper end portion of the case upright side wall. And the side pad is provided with an engaging groove along the upper end portion of the side pad so that the case upright side wall and the sleeper end of the vibration isolating case are provided. When the side pad is interposed between the side pad and the side pad, the side pad engaging groove is guided and guided by the saddle-shaped inner ridge of the case upright side wall and inserted from the sleeper longitudinal direction. Not only can it be easily and securely installed in the vibration isolating case, but also after the side pad is interposed between the case upright side wall and the sleeper end of the vibration isolating case, Is entirely on the saddle-shaped inner ridge of the case upright side wall Because the securely engaged over apply region can be more further prevent escape upward side pad with further prevent lifting upward side pads for vibration isolation case.

In the invention according to claim 6, in addition to the structure of the sleeper vibration isolator described in claim 5, the engaging groove guides the lower end portion of the hook-shaped inner ridge to the groove bottom of the engaging groove. When the engaging groove of the side pad is guided and guided by the saddle-shaped inner protrusion on the case upright side wall and inserted from the longitudinal direction of the sleeper, the engaging groove of the side surface pad is provided. The groove bottom ridge provided on the groove bottom contacts the lower end portion of the saddle-shaped inner ridge and suppresses the inclination of the side pad so that the side pad can be smoothly inserted into the anti-vibration case and securely attached. be able to.
After the side pad is interposed between the case upright side wall and the sleeper end of the vibration isolating case, the groove bottom ridge of the side pad is located at the lower end portion of the bowl-shaped inner ridge of the case upright side wall. Since they are in contact with each other, it is possible to prevent the side pads from being lifted upward with respect to the anti-vibration case in the initial stage.

  According to the sleeper vibration isolator of the invention of claim 7, in addition to the effect produced by the invention of any one of claims 2 to 6, the side pad is provided below the engaging recess. By having a slit for mounting partially cut along the longitudinal direction of the pad, the engagement concave portion of the side surface pad is fitted on the engagement convex portion of the end surface pad, and the concave and convex engagement is performed. Since the engaging recess of the side surface pad can be easily bent upward and lifted, the engaging recess of the side surface pad can be fitted on the engaging protrusion of the end surface pad.

  According to the sleeper vibration isolator of the invention according to claim 8, in addition to the effect of the invention according to claim 7, the cut end portion of the slit for mounting is formed in a circular shape, thereby When the engagement concave portion of the pad for padding is lifted upward and the engagement concave portion of the side surface pad is fitted to the engagement convex portion of the end surface pad, the circular cut end portion is loaded on the mounting slit. In order to relieve the force, it is possible to prevent inadvertent cracks and cracks that tend to occur at the cut end portion of the mounting slit.

According to the sleeper vibration isolator of the invention according to claim 9, in addition to the effect exhibited by the invention according to any one of claims 1 to 8, the pad for the end surface is the case upright end of the vibration isolating case. Since the shim plate is provided on the wall, the thickness of the shim plate and its combination can be increased or decreased by the number of the interposed plates, so the rail laying position along the sleeper longitudinal direction Can be finely corrected.

A pad for a bottom surface according to a tenth aspect of the present invention is the sleeper vibration isolator according to any one of the first to ninth aspects, wherein the pad is laid on the case bottom plate of the vibration isolating case. The vibration in the up and down direction of the sleeper which tends to occur at the end of the sleeper can be suppressed.

The spacing material for a bottom surface of the invention according to claim 11 is the pad for bottom surface laid on the case bottom plate of the vibration isolating case in the sleeper vibration isolating device according to any one of claims 1 to 9. Can be positioned on the case bottom plate of the vibration-proof case.

Explanatory drawing which shows the installation state of the sleeper vibration isolator which is an Example of this invention. The perspective view of the sleeper vibration proof installation which is a present Example. The exploded assembly figure of the sleeper vibration isolator shown in FIG. The expanded sectional view of the A section shown in FIG. The perspective view of the pad for an end surface used for the sleeper vibration isolator of a present Example. The enlarged view of the B section shown in FIG. The perspective view seen from the outside of the side pad used for the sleeper vibration isolator of a present Example. The perspective view seen from the inner side of the pad for side surfaces used for the sleeper vibration isolator of a present Example. The state figure at the time of the assembly | attachment start of the pad for end surfaces, and the pad for side surfaces. The state figure in the middle of the assembly | attachment of the pad for end surfaces, and the pad for side surfaces. The state figure at the time of the assembly | attachment completion of the pad for end surfaces, and the pad for side surfaces.

  The present invention opens the upper side with a square case bottom plate, a pair of case upright side walls spaced apart from the case bottom plate, and a case upright end wall provided at one of the left and right edges of the case upright side walls. A bottomed box-shaped anti-vibration case that is configured so that the sleeper end of the sleeper is semi-embedded in the roadbed, and an end pad interposed between the sleeper end and the case upright end wall And a sleeper vibration isolator comprising at least a side pad interposed between the case upright side wall and the sleeper end, and the end surface pad is fastened to the case upright end wall of the vibration isolation case to prevent it from coming off. The end face pad and the side pad are attached to the vibration isolating case easily and securely to prevent the end face pad and the side pad from coming out of the vibration isolating case, thereby reducing the load during train travel. receive If the trajectory without prone sleepers stable rails and suppress lifting of the one that maintained for a long term, specific embodiments thereof are it may be any one.

For example, if the cross-section has a trapezoidal cross-section, it can be any of reinforced concrete sleepers (RC), prestressed concrete sleepers (PC), synthetic resin sleepers, etc. It doesn't matter.
Furthermore, the concrete form of the roadbed on which the sleepers are laid and fixed may be any concrete roadbed formed on a strong roadbed such as a reinforced concrete roadbed, fiber-reinforced concrete roadbed, precast concrete roadbed, etc. I do not care.

  The material of the vibration-proof case may be any synthetic resin material such as hard foamed urethane, polypropylene resin, polyester resin, polyamide resin, and epoxy resin.

  The material for the end face pad and the side face pad may be a synthetic rubber such as styrene butadiene rubber (SBR), chloroprene rubber (CR) or urethane rubber (U), or an elastic material such as natural rubber (NR). Anything can be used.

  Further, the concrete form of the retaining fastening means may be any as long as it fixes the end face pad to the vibration-proof case, such as a wood screw (tapping screw) or a bolt.

Hereinafter, a sleeper vibration isolator 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11.
Here, FIG. 1 is a side view of a sleeper vibration isolator according to an embodiment of the present invention, FIG. 2 is a perspective view of a sleeper vibration isolation installation according to this embodiment, and FIG. 1 is an exploded view of the sleeper vibration isolator shown in FIG. 1, FIG. 4 is an enlarged cross-sectional view of a portion A shown in FIG. 1, and FIG. 5 is for the end face used in the sleeper vibration isolator of this embodiment. 6 is a perspective view of the pad, FIG. 6 is an enlarged view of a portion B shown in FIG. 2, and FIG. 7 is a perspective view seen from the outside of the side pad used in the sleeper vibration isolator of this embodiment. 8 is a perspective view seen from the inside of the side pad used in the sleeper vibration isolator of the present embodiment, and FIG. 9 is a state diagram at the start of assembly of the end face pad and the side pad. FIG. 10 is a state diagram in the middle of assembling the end surface pad and the side surface pad, and FIG. 11 is an end surface pad and the side surface pad. Is a state diagram at the completion of assembly of the.

The sleeper vibration isolator 100 according to an embodiment of the present invention is positioned at left and right portions of a concrete sleeper M that supports a rail R using a rail fastening device T, as shown in FIGS. It is attached to the sleeper end M1.
1 shows the sleeper vibration isolator 100 in the same mounting state on the left and right parts of the sleeper M, but the outline of the sleeper vibration isolator 100 is easy to understand for convenience. , One shows a side view thereof, and the other shows a side sectional view thereof.

  As shown in FIG. 3, the sleeper vibration isolator 100 according to the present embodiment includes a rectangular case bottom plate 111 and a pair of case upright side walls 112 and 112 that are spaced from the case bottom plate 111 in an upright state. The case upright side walls 112, 112 are provided with a case upright end wall 113 provided at one of the left and right edges of the case upright, and the sleeper end M1 of the sleeper M is attached to the concrete road bed (with the attached state). An anti-vibration case 110 having a bottomed box shape that is semi-embedded in an unillustrated), and a sleeper end interposed between the case upright end wall 113 of the anti-vibration case 110 and the sleeper end M1 of the sleeper M An end face pad 120 that suppresses vibration in the longitudinal direction of the sleeper which tends to occur in the part M1, and a case upright side wall 112 of the vibration isolating case 110 and a sleeper end M1 of the sleeper M, respectively. A side pad 130 for suppressing vibration in the longitudinal direction of the rail, which tends to occur at the sleeper end M1, and a case bottom plate 111 of the vibration isolating case 110 are laid and arranged on the sleeper end M1 of the sleeper M. A bottom surface pad 140 for suppressing vibration in the vertical direction of the sleeper and a bottom surface spacing member 150 for positioning and arranging the bottom surface pad 140 on the case bottom plate 111 of the vibration isolating case 110 are provided.

Further, as shown in FIG. 4, the sleeper vibration isolator 100 according to the present embodiment is provided with a retaining insertion hole 121a in the pad collar 121 projecting from the upper end portion of the end surface pad 120 to the road bed side, On the other hand, a retaining guide hole 113b is provided in the case upright end wall flange 113a that extends from the upper end portion of the case upright end wall 113 to the road bed side.
Then, a retaining fastening means 160 for screwing the end surface pad 120 to the case upright end wall 113 of the vibration isolating case 110, that is, a wood screw is provided between the retaining insertion hole 121 a of the end surface pad 120 and the case upright end wall 113. It is provided in a state of being inserted through the retaining guide hole 113b.
The end surface pad 120 is securely fixed to the case upright end wall 113 of the vibration isolating case 110 by the fastening means 160 for preventing the removal.

Further, as shown in FIG. 4, the end surface pad 120 is provided on the case upright end wall 113 of the vibration-proof case 110 with a shim plate 170 interposed therebetween.
Thus, the thickness of the shim plate 170 and the combination thereof can be increased or decreased by the number of interposed sheets, and the laying position of the rail R is finely corrected along the sleeper longitudinal direction.

Next, a specific engagement structure between the end surface pad 120 and the side surface pad 130, which is the most characteristic feature of the sleeper vibration isolator 100 according to the present embodiment, will be described with reference to FIGS.
First, as shown in FIG. 5, an engagement convex portion 122 is provided at the upper end portion on the side surface pad side of the end surface pad 120, while the upper end portion on the end surface pad side of the side surface pad 130 is provided with FIG. As shown in FIG. 11 to FIG. 11, an engagement recess 131 is provided.
As a result, the engaging recess 131 of the side pad 130 is engaged with the engaging protrusion 122 of the end surface pad 120 fixed to the case upright end wall 113 of the vibration isolating case 110 in a concavo-convex manner. .

Then, as shown in FIG. 10, the recess-side retaining inclined surface 131 a in a state of expanding from the recess opening end of the engaging recess 131 toward the bottom end of the engaging recess 131 protrudes from the projecting base end of the engaging projecting portion 122. It is disposed opposite to the convex-part-side retaining inclined surface 122a in an overhanging state spreading toward the tip.
As a result, even if a lifting force is generated on the side pad 130 due to vibration generated when the train passes, the recess-side retaining inclined surface 131a receives a drag force from the convex-side retaining retaining inclined surface 122a. The lifting force generated in the pad 130 is suppressed.

Further, the projecting protruding pieces 123 arranged so as to be opposed to and engaged with the engaging convex portions 122 of the end surface pads 120 cause the engaging concave portions 131 of the side surface pads 130 to be engaged with the engaging convex portions 122 of the end surface pads 120. The positioning is clamped.
As a result, even if the side pad 130 tends to be displaced in the sleeper longitudinal direction due to vibration generated when the train passes, the engagement convex portion 122 and the convex protruding piece 123 of the end surface pad 120 are used for the side surface. The engagement recess 131 of the pad 130 is sandwiched and positioned to prevent the side pad 130 from slipping out of the vibration isolation case 110 in the sleeper longitudinal direction.

Further, the side surface pad 130 described above is provided with an engaging groove 132 along the upper end portion of the side surface pad 130.
Thus, as shown in FIG. 3, when the side pad 130 is interposed between the case upright side wall 112 of the vibration isolating case 110 and the sleeper end M1 of the sleeper M, the engagement of the side pad 130 is increased. The joint groove 132 is guided and guided by the flange-shaped inner ridge 114 provided along the upper end portion of the case upright side wall 112 so that the side pad 130 can be easily inserted from the sleeper longitudinal direction.

  For this reason, not only can the side pad 130 be easily and reliably attached to the vibration isolating case 110, but the side pad 130 can be disposed between the case upright side wall 112 of the vibration isolating case 110 and the sleeper end M1. After the interposition, the engaging groove 132 of the side pad 130 is securely engaged with the flange-like inner ridge 114 of the case upright side wall 112 over the entire engaging region. In addition to further preventing the pad 130 from rising upward, the side pad 130 has a wedge-shaped pad cross section, and thus further prevents the side pad 130 from being pulled upward.

Further, as shown in FIGS. 6 and 7, the engagement groove 132 of the side surface pad 130 has a groove bottom protrusion 132 a that guides the lower end portion of the bowl-shaped inner protrusion 114 to the groove bottom of the engagement groove 132. Have.
As a result, the engagement groove 132 of the side pad 130 is provided at the groove bottom of the engagement groove 132 when it is guided and guided by the flange-shaped inner ridge 114 of the case upright side wall 112 and inserted from the sleeper longitudinal direction. The groove bottom protrusion 132a thus brought into contact with the lower end portion of the bowl-shaped inner protrusion 114 suppresses the inclination of the side pad 130.
Further, after the side surface pad 130 is interposed between the case upright side wall 112 of the vibration isolating case 110 and the sleeper end M1, the groove bottom protrusion 132a of the side surface pad 130 has a bowl shape of the case upright side wall 112. Since the contact is made along the lower end portion of the inner ridge 114, the side pad 130 is lifted due to the upward displacement of the side pad 130 during the construction of the roadbed concrete and the vibration when passing through the train. Etc. can be prevented.

Further, as shown in FIGS. 7 and 8, the side surface pad 130 has a mounting slit 133 that is partially cut along the pad longitudinal direction at a lower portion of the engagement recess 131.
When the engagement recess 131 of the side surface pad 130 is fitted to the engagement protrusion 122 of the end surface pad 120 by the mounting slit 133, the engagement recess 131 of the side surface pad 130 is shown in FIG. Can be easily bent upward and the engaging recess 131 of the side surface pad 130 is easily fitted on the engaging protrusion 122 of the end surface pad 120 as shown in FIG.

Then, the cut end portion 134 of the mounting slit 133 described above is formed in a circular shape as shown in FIG.
Therefore, as shown in FIG. 10, the circular cut end portion 134 causes the engagement recess 131 of the side pad 130 to be bent upward and lift the engagement recess 131 of the side pad 130 so that the end pad 120 has When the engagement protrusion 122 is fitted, the circular cut end portion 134 relieves the force applied to the mounting slit 133, and inadvertent cracks and cracks that tend to occur in the cut end portion 134. Prevents cracking.

  The sleeper vibration isolator 100 according to the embodiment of the present invention thus obtained includes a rectangular case bottom plate 111 and a pair of case upright side walls 112 and 112 that are spaced from the case bottom plate 111 in an upright state. And the case upright end wall 113 provided at one of the left and right edges of the case upright side walls 112, 112 so that the upper side is opened, and the sleeper end M1 of the sleeper M is half-mounted on the roadbed in the mounted state. A bottomed box-shaped anti-vibration case 110 to be embedded, an end face pad 120 interposed between the sleeper end M1 and the case upright end wall 113, and the case upright side wall 112 and the sleeper end M1. In addition to suppressing the vibration of the sleeper M that supports the rail R, the end surface pad 120 is provided with the vibration isolation case 11. Since the end surface pad 120 is fixed to the case upright end wall 113 of the vibration isolating case 110 in a simple and reliable manner by being fixed to the case upright end wall 113 through the retaining fastening means 160. Further, it is possible to completely prevent the end surface pad 120 from being lifted up or pulled out from the anti-vibration case 110, which is likely to be generated by vibration when passing through the train.

  The engagement recess 131 provided at the upper end portion on the end surface pad side of the side surface pad 130 is engaged with the engagement protrusion 122 provided at the upper end portion on the side pad side of the end surface pad 120 in a fitted state. And a recess-side retaining inclined surface 131a that extends from the recess opening end of the engagement recess 131 toward the bottom end of the engagement recess 131, and that protrudes from the projection base end of the engagement projection 122 toward the tip of the projection. By being disposed opposite to the part-side retaining inclined surface 122a, the lateral pad 130 is prevented from being displaced in the longitudinal direction of the anti-vibration case 110 due to vibrations or the like caused by passing through the train, or slipping out, The effect is enormous, such as maintaining a stable track of the rail R over a long period of time.

DESCRIPTION OF SYMBOLS 100 ... Sleeper vibration isolator 110 ... Anti-vibration case 111 ... Case bottom plate 112 ... Case upright side wall 113 ... Case upright end wall 113a ... Case upright end wall collar 113b · Retaining guide hole 114 ··· saddle-shaped inner ridge 120 · · · Pad 121 for end face · · · Pad flange portion 121a · · · Retaining insertion hole 122 · · · engagement convex portion 122a ··· convex portion Side retaining stop inclined surface 123 ... convex protruding piece 130 ... side pad 131 ... engaging recess 131a ... recessed portion side retaining slope 132 ... engaging groove 132a ... groove bottom Ridge 133... Slit for mounting... Cutting end portion 140... Pad 150 for bottom surface... Spacing material 160 for bottom surface. Sleeper M DESCRIPTION OF SYMBOLS 1 ... Sleeper edge part R ... Rail T ... Rail fastening device

Claims (11)

A rectangular case bottom plate, a pair of case upright side walls spaced apart from the case bottom plate, and a case upright end wall provided on one of the left and right edges of the case upright side wall are configured to open upward. A bottomed box-shaped anti-vibration case in which the sleeper end of the sleeper is semi-embedded in the roadbed in the mounted state, an end surface pad interposed between the sleeper end and the case upright end wall, and the case In the sleeper vibration isolator comprising at least side pads interposed between the upright side wall and the sleeper end,
The sleeper vibration isolator, wherein the end surface pad is fixed to a case upright end wall of the vibration isolating case via a fastening means for retaining.   The engagement concave portion provided at the upper end portion on the end surface pad side of the side surface pad is engaged with the engagement convex portion provided at the upper end portion on the side surface pad side of the end surface pad in an uneven state in a fitted state. The sleeper vibration isolator according to claim 1.   The recess-side retaining inclined surface that extends from the recessed opening end of the engaging recessed portion toward the bottom of the recessed portion is a convex-side retaining inclined surface that expands from the projecting proximal end of the engaging projecting portion toward the protruding tip end. 3. The sleeper vibration isolator according to claim 2, wherein the sleeper vibration isolator is disposed oppositely.   A projecting protruding piece arranged opposite to and engaging with the engaging convex portion of the end surface pad positions and holds the engaging concave portion of the side surface pad with respect to the engaging convex portion of the end surface pad. The sleeper vibration isolator according to claim 3. The case upright side wall is provided with a hooked inner ridge along the upper end portion of the case upright side wall,
The sleeper vibration isolator according to any one of claims 1 to 4, wherein the side pad is provided with an engagement groove along an upper end portion of the side pad.   6. The sleeper vibration isolator according to claim 5, wherein the engagement groove has a groove bottom protrusion that guides a lower end portion of the hook-shaped inner protrusion at a groove bottom of the engagement groove.   7. The mounting pad according to claim 2, wherein the side surface pad has a mounting slit partially cut along a longitudinal direction of the pad at a lower portion of the engagement recess. The sleeper vibration isolator as described.   The sleeper vibration isolator according to claim 7, wherein a cut end portion of the mounting slit is formed in a circular shape.   The sleeper protection according to any one of claims 1 to 8, wherein the end surface pad is provided on a case upright end wall of the vibration isolation case with a shim plate interposed therebetween. Shaker. The sleeper vibration isolator according to any one of claims 1 to 9, wherein the bottom pad is laid on a case bottom plate of the vibration isolating case. The sleeper vibration isolator according to any one of claims 1 to 9, wherein a bottom pad laid on a case bottom plate of the vibration isolation case is disposed on the case bottom plate of the vibration isolation case. A spacing material for the bottom surface.