JP2014125736A - Crosstie - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crosstie, which consists of a crosstie main body and a case member that are separably integrated, and is unlikely to suffer deformation on the case member during transportation.SOLUTION: A case member 3 covers a bottom face 2b of and side faces 2c of a crosstie main body 2. Elastic members 5a and 5b are placed between the bottom face 2b of the crosstie main body 2 and a bottom wall 3a of the case member 3, perpendicularly below rail-sitting points 17 and 18. A filling member 6 is filled in the spaces other than the part occupied by the elastic members 5a and 5b under the bottom face 2b. The filling member 6 is glued to the bottom face 2b of the crosstie main body 2 and the bottom wall 3b of the case member 3. These arrangements prevent the middle part of the case member 3 from being detached from the crosstie main body 2, enabling the inhibition of deformation of the case member 3, during transportation of the crosstie 1. Thus, there is no gap caused between the case member 3 and the crosstie main body 2, eliminating chances for foreign matters to intrude into the crosstie 1.

Description

  The present invention relates to a railway sleeper installed on a ballast roadbed, and more particularly to a railroad sleeper installed on a ballast roadbed in which the ballast is hardened with a coagulant after the installation.

  Conventional railroad tracks generally employ a structure in which sleepers are arranged on a roadbed and two rails are installed in parallel at predetermined intervals on the sleepers.

  The sleeper is required to have a function in which two rails are firmly fastened, the distance between the rails is properly maintained, and the load and vibration received from the train traveling on the rails are widely transmitted to the roadbed side. Conventionally, sleepers called PC (Prestressed Concrete) sleepers have been used exclusively. The PC sleeper has rigidity and resistance to vibration, and can exhibit very excellent performance.

  However, PC sleepers have the disadvantage that the specific gravity is large, the longer the length, the greater the weight and the difficulty of handling. That is, the PC sleeper has a difficulty that it is difficult to carry out transportation and installation work. Therefore, recently, resin sleepers that are lightweight and have excellent durability have been developed, and there have been many opportunities to use them instead of PC sleepers. Resin sleepers, like PC sleepers, do not have a vibration absorbing function themselves, and are therefore often used in combination with elastic materials having anti-vibration properties.

  On the other hand, typical roadbeds include a concrete roadbed and a ballast roadbed, each having advantages and disadvantages.

  A concrete roadbed is a roadbed formed by pouring fresh concrete into a formwork and has the advantage of requiring little maintenance. However, the concrete road floor can be constructed without any problem as long as it is a newly laid track, but there is a situation that it is difficult to introduce it into an existing track. That is, the train operation must be stopped until the concrete is solidified and the concrete roadbed can exhibit a predetermined strength. However, in recent years, trains are often operated in the timetable from early morning to midnight. Therefore, it is difficult to introduce the concrete roadbed into the existing track.

  The ballast roadbed is a roadbed in which ballast (gravel and crushed stone) compacted under a sleeper tree is arranged, and can absorb the load and vibration received from a traveling train with the ballast. For this reason, it is considered preferable to use a ballast that has a large supporting force and resistance force and also has good drainage. Examples of such ballast include those obtained by crushing hard and tough stones such as granite, granite, andesite to about 70 to 15 mm. Such a ballast roadbed has the advantage that track construction is relatively easy and construction costs can be kept low.

  However, when the ballast roadbed is subjected to a load or vibration, the ballast is gradually abraded and the internal voids are reduced. As a result, the initial performance cannot be exhibited and maintenance work is required.

  Then, after constructing a ballast roadbed that is easy to construct, a method for constructing the roadbed that has been finished like a concrete roadbed by solidifying the ballast with a coagulant has been developed. Is disclosed.

  A normal concrete roadbed has a relatively large interval between aggregates, and functions as a solid roadbed only when cement penetrates between the aggregates and hardens. The roadbed disclosed in Patent Document 1 is configured by solidifying an existing ballast roadbed with a coagulant such as cement. That is, the distance between the ballasts is close, and the load and vibration received from the train can be supported by the ballast alone, but the whole is integrated by filling a coagulant between the ballasts. Therefore, the roadbed disclosed in Patent Document 1 has the advantage of easy construction of the ballast roadbed and the advantage that maintenance of the concrete roadbed is almost unnecessary.

  However, when the above-mentioned resin sleeper is installed on the ballast roadbed, the elastic material (vibration-proof rubber sheet) provided on the resin sleeper may be worn by the ballast. Further, when the ballast road bed is hardened with a coagulant, the vibration-proof rubber sheet is hardened with the coagulant, and as a result, the bending of the vibration-proof rubber sheet is restricted, and the vibration relaxation function may be impaired.

  Therefore, conventionally, by adopting a track structure as shown in FIG. 10 to FIG. 13, the deflection control of the anti-vibration rubber sheets 84 and 85 by a coagulant (not shown) that hardens the ballast 89 of the ballast roadbed 88 is performed. I was avoiding it. A sleeper 81 shown in FIGS. 10 to 13 is formed by covering the periphery of a resin sleeper main body 82 with a resin case member 83, and vibration isolating rubber sheets 84 and 85 are disposed between the sleeper main body 82 and the case member 83. Yes. That is, as shown in FIGS. 11 (b) and 12, the anti-vibration rubber sheet 84 is disposed around the entire side surface 82a of the sleeper main body 82, and the anti-vibration rubber sheet 85 is provided on the rails 86 and 87 (see FIG. 10) It is disposed on the load support portions 82b and 82c corresponding to the position immediately below. And as shown to Fig.11 (a), between the side surface 82a of the sleeper main body 82 and the case member 83 is sealed with the vibration proof rubber sheet 84. FIG.

  When the sleeper tree 81 is configured in this way, the load and vibration received from a train (not shown) traveling on the rails 86 and 87 are smoothly transmitted over a wide range to the ballast road bed 88 (FIG. 10) side. Is done. Here, the case member 83 is in contact with the rails 86 and 87, but is made of a material (resin) that does not allow the case member 83 to conduct. Therefore, conduction between the rails 86 and 87 is prevented. In FIG. 10, depiction of the fasteners of the sleepers 81 and the rails 86 and 87 is omitted.

  The ballast 89 of the ballast roadbed 88 is preliminarily compacted by a not-shown compactor or the like, and a sleeper 81 and rails 86 and 87 are installed on the ballast roadbed 88. Then, by running a train and applying a load to the sleeper tree 81 via the rails 86 and 87, the ballast 89 below (directly below) the sleeper tree 81 is further compacted. Thereafter, the ballast 89 is hardened with a coagulant such as cement.

JP-A-6-108401

  By the way, in the sleeper 81 shown in FIG. 11, the anti-vibration rubber sheet 85 is disposed only on the load support portions 82b and 82c on the lower surface of the sleeper main body 82 just below the rails 86 and 87. The reason why the anti-vibration rubber sheet 85 is not disposed on the entire lower surface of the sleeper main body is as follows in addition to the fact that it is economically disadvantageous when disposed on the entire surface.

  The track is provided with a branching portion (not shown) that branches in two different directions or more. In this branch portion, a plurality of sets of rails 86 and 87 are arranged in a concentrated manner. On the other hand, the sleeper at the branching portion has a length over the plurality of sets of rails 86 and 87. That is, in the branch part, a sleeper that is longer than a sleeper used in a portion where the rail is not branched is used so that a plurality of sets of rails can be supported by a common sleeper. When the vibration isolating rubber sheet is arranged on the entire lower surface of the sleeper trees having different lengths, the compressive stress generated in the vibration isolating rubber sheet is changed for each sleeper tree in the vicinity of the branch portion. Variations in the deflection of the train will adversely affect the ride comfort of the train passengers. For this reason, the vibration-insulating rubber sheet 85 is disposed not only on the entire lower surface of the sleeper body, but only on the load support portions 82b and 82c that receive loads from the rails 86 and 87 side.

  In the sleeper 81, the sleeper main body 82 and the case member 83 are integrated by adhering the vibration-proof rubber sheets 84 and 85 to both the sleeper main body 82 and the case member 83.

  On the other hand, since the anti-vibration rubber sheets 84 and 85 deteriorate over time, it is necessary to replace them every predetermined period. However, since the anti-vibration rubber sheets 84 and 85 are bonded to both the sleeper main body 82 and the case member 83, the sleeper main body 82 and the case member 83 cannot be easily separated. That is, it is not appropriate to bond the anti-vibration rubber sheets 84 and 85 and the case member 83 from the viewpoint of replacing the anti-vibration rubber sheets 84 and 85.

  However, when the sleeper 81 is transported, there is a problem that bending is likely to occur unless the sleeper main body 82 and the case member 83 are integrated. That is, when the sleeper 81 is transported, generally, both ends of the sleeper 81 are supported and moved by being suspended by a construction machine or the like (not shown), so that the central part of the sleeper 81 is easily bent.

  Further, the central portion of the case member 83 disposed on the outside of the sleeper main body 82 is more easily bent downward than the central portion of the sleeper main body 82. Accordingly, the case member 83 is deformed into a form opened outward as indicated by an arrow in FIG.

  Even if the sleeper 81 with the deformed case member 83 is installed on the ballast roadbed 88, the deformation of the case member 83 is not completely restored as shown in FIG. As a result, an unnecessary gap 90 is generated between the side surface 82 a of the sleeper body 82 and the case member 83.

  Then, after the sleeper 81 is installed on the ballast roadbed 88, the coagulant that hardens the ballast 89 is spread, so that the coagulant easily enters the gap 90, and the coagulant adheres to the anti-vibration rubber sheets 84 and 85. There is a possibility that the vibration damping function is impaired due to the deformation of the vibration rubber sheets 84 and 85 being restricted.

  Therefore, in view of the above-described circumstances, an object of the present invention is to provide a sleeper in which the sleeper main body and the case member are integrated in a separable manner and the case member is difficult to be deformed during transportation.

  The invention according to claim 1 for solving the above-mentioned problem is a sleeper having a sleeper body that supports railroad rails, wherein a casing having at least one surface opened, and the vibration insulation of the sleeper body are provided. A plurality of elastic body pieces to be secured, wherein the housing accommodates a sleeper body, and exposes a portion of the sleeper body on the rail installation side from the one surface side; at least rail installation in the sleeper body The elastic body pieces are arranged at positions opposite to the side and spaced apart in the gauge direction, and the sleeper body and the casing are bonded or filled in portions other than the elastic body pieces. It is a sleeper characterized by being integrally connected through an agent.

In the first aspect of the present invention, the elastic piece is disposed between the casing and the sleeper body. Therefore, even if the sleeper is installed on the ballast of the ballast roadbed, the elastic piece does not contact the ballast. Therefore, the elastic piece is not worn by ballast.
In addition, the sleeper body and the housing are integrally connected via an adhesive applied or filled to the portions excluding each elastic piece, so when the pillow is supported and lifted, And the casing do not peel off, and the bending of the casing can be suppressed.
Furthermore, when exchanging the aged elastic piece, the force can be applied in a direction to separate the sleeper main body and the casing, and the two parts can be separated by breaking the adhesive part. Then, after replacing the elastic piece with a new one, the sleeper can be assembled again.

  In the invention according to claim 2, a filling member having an elastic coefficient equal to or less than that of the elastic body piece is disposed between the elastic body pieces arranged at positions separated in the gauge direction, The sleeper according to claim 1, wherein the adhesive is applied between the sleeper body and the filling member, and between the housing and the filling member.

In the invention according to claim 2, since the elastic coefficient of the filling member is equal to or less than the elastic coefficient of the elastic piece, the elastic piece can be elastically deformed while being supported by the filling member. It is possible to satisfactorily suppress vibration received from a train traveling on the top. In addition, since the filling member is bonded to the sleeper body and the housing, if the force is applied in a direction that separates the sleeper body and the housing with a force exceeding the adhesive strength, the sleeper body and the housing may be separated. it can. As a result, maintenance such as replacement of an aged elastic piece can be easily performed.
Here, the adhesive strength is a product of an adhesive area and an adhesive force.
The filling member is preferably made of a foam material.
Furthermore, it is preferable that the filling member is disposed between the sleeper main body and the case member at a portion where the elastic body piece is not disposed without a gap.

  The invention according to claim 3 is characterized in that the elastic piece and the housing are connected by an adhesive or adhesive having lower adhesive strength than the adhesive. 2. A sleeper according to 2.

  In the invention according to claim 3, since the elastic piece and the casing are connected with an adhesive or adhesive having a lower adhesive strength than the adhesive, the elastic piece and the casing are connected. There is no gap. Therefore, it is difficult for rainwater and foreign matter to enter between the elastic piece and the casing. Therefore, deterioration of the elastic piece can be suppressed. In addition, since the elastic piece and the casing are bonded with an adhesive having low adhesive strength, the elastic piece and the casing can be easily detached when replacing the deteriorated elastic piece.

  The invention according to claim 4 is characterized in that the sleeper main body and the casing are made of a resin foam reinforced with long glass fibers. A pillow.

  In the invention according to claim 4, since the sleeper main body and the casing are made of a resin foam reinforced with long glass fibers, the specific gravity of the sleeper main body and the casing is equivalent to the specific gravity of wood. It is considerably lighter than concrete. Therefore, transportation and laying work are easy. In addition, processing (nail driving, wood screwing, adhesion, grooving, drilling, painting, etc.) is easy, and the strength is higher than wood and good durability is obtained. Furthermore, the antiseptic treatment and ant protection measures necessary for wood are unnecessary.

  The invention according to claim 5 is the sleeper according to any one of claims 1 to 4, wherein the sleeper body and the casing are bound together by a binding member.

  In the invention according to claim 5, since the sleeper body and the casing are bound by the binding member, it is possible to satisfactorily prevent the casing from being peeled off from the sleeper body when the sleeper is transported. can do.

  Since the sleeper of the present invention has a plurality of elastic body pieces between the sleeper main body and the casing, it is possible to achieve an anti-vibration effect. Moreover, since the adhesive is filled in the portion between the sleeper body and the casing, excluding the elastic piece, it is possible to prevent rainwater and foreign matter from entering between the sleeper body and the housing. it can. Therefore, deterioration of the elastic piece can be suppressed. Furthermore, since the sleeper body and the housing are bonded with an adhesive, the housing is not detached from the sleeper body and is difficult to bend when supporting and transporting both ends of the sleeper. Therefore, the housing is not easily deformed.

(A) is the perspective view of the state which the sleeper which implemented this invention was assembled, (b) is the exploded perspective view which decomposed | disassembled the sleeper main body and the case member in the sleeper of (a), (c () Is the disassembled perspective view which decomposed | disassembled the sleeper-body main body of FIG. (A) is the perspective view which looked at the sleeper tree of Drawing 1 (a) from the lower part, (b) is the exploded perspective view which looked at the sleeper tree of Drawing 1 (a) from the lower part, (c), It is the disassembled perspective view which looked at the sleeper tree main body of FIG.1 (c), the anti-vibration rubber sheet, and the foam material from the downward direction. It is AA sectional drawing of Fig.1 (a). It is a perspective view which shows the state which supported and lifted the both ends of the sleeper tree of Fig.1 (a). FIG. 2 is a plan view of a track structure in which the sleeper shown in FIG. 1A is arranged on a ballast roadbed and rails are further arranged on the sleeper. It is sectional drawing which shows the state which separated the sleeper shown in FIG. 3 into the sleeper main body and the case member. It is sectional drawing which shows the modification of FIG. 6, (a) shows the state by which the sleeper main body and the case member were isolate | separated in the state fixed to the lower surface of the sleeper main body without destroying a foam material, (b) ) Shows a state where the sleeper main body and the case member are separated in a state where the foam material is fixed to the upper surface of the bottom wall of the case member without being destroyed. It is a perspective view which shows the state which tied the sleeper shown in Fig.1 (a) with the binding band. FIG. 1 is a perspective view showing a modified example of the sleeper shown in FIG. 2, and (a) is a perspective view of a sleeper main body in which an elastic member and a foam material are integrated, and a case member as viewed from below; (B) is the exploded perspective view which decomposed | disassembled the sleeper main body of (a), an elastic member, and a foaming material. It is a top view of the conventional track structure. (A) is a perspective view of the conventional sleeper tree, and (b) is an exploded perspective view of the sleeper tree of (a). In FIG. 11 (a), it is the perspective view seen from the lower part except the case member from the sleeper. It is BB sectional drawing of Fig.11 (a). It is a perspective view which shows the state which supported and lifted the both ends of the sleeper tree of Fig.11 (a). FIG. 15 is a plan view of a track structure in which the sleeper of FIG. 14 is installed on a ballast roadbed and rails are further installed.

Hereinafter, description will be given with reference to the drawings.
As shown in FIGS. 1 (a) to 1 (c), the sleeper 1 includes a sleeper body 2, a case member 3 (housing), anti-vibration rubber sheets 4, 5a, 5b (elastic body pieces), and a foam 6 (Filling member).

  The sleeper main body 2 is formed of a synthetic resin material made of a resin foam (fiber reinforced hard resin foam) reinforced with long glass fibers called FFU (Fiber reinforced foamed urethane). In particular, it is desirable that it is made of polyurethane because of easy foam formation. The specific gravity of the sleeper body 2 is preferably between 0.6 and 1.0. When the specific gravity of the sleeper body 2 is within this range, the material cost can be reduced, and the handling property during construction (support during transportation) can be kept good. For example, a fiber-reinforced urethane foam having a specific gravity of about 0.74 can be employed for the sleeper body 2.

  The sleeper body 2 is a long member having a square or rectangular cross-sectional shape. In each figure, the sleeper body 2 is not drawn so long for the sake of space, but actually, the sleeper body 2 has a width and height of a few tens to several tens of centimeters. It has a length of about 2 to 10 meters.

  The sleeper body 2 has an upper surface 2a, a lower surface 2b, and four side surfaces 2c. The side surface of the sleeper tree main body 2 has a portion extending in the longitudinal direction and a lip portion, and in FIG. 1 and FIG. On the upper surface 2a, rail installation portions 17 and 18 indicated by a broken line range are provided. Further, the lower surface 2 b of the sleeper main body 2 has load support portions 9 and 10. The load support portions 9 and 10 are directly below the rail installation portions 17 and 18, and are trains received from the rails 11 and 12 (FIG. 5) installed on the upper surface 2a (rail installation portions 17 and 18) of the sleeper body 2. (Not shown) to support the load and vibration.

  The case member 3 is made of the same synthetic resin material as the sleeper main body 2. The specific gravity of the case member 3 is preferably between 0.4 and 1.0. If the specific gravity of the case member is within this range, the compression strength can be maintained, and the ability to protect the anti-vibration rubber sheets 4, 5a, 5b (described later) from the ballast 16 (described later) can be maintained high. As shown in FIG. 1 (b), the case member 3 is a box-shaped member having a bottom wall 3a and a side wall 3b and having an open top.

  The anti-vibration rubber sheet 4 is formed in a thin plate shape, and is integrally fixed to the side surface 2c of the sleeper body 2 with an adhesive. The anti-vibration rubber sheets 5a and 5b are also formed in a thin plate shape like the anti-vibration rubber sheet 4, and are integrally fixed to the lower surface 2b of the sleeper body 2 with an adhesive. The type of the adhesive is not particularly limited, and for example, an epoxy adhesive, a urethane adhesive, or the like can be employed. Moreover, a well-known adhesive material can also be employ | adopted instead of an adhesive agent.

  The foam material 6 (filling member) is a resin-made high-foam molded article and is made of a material such as urethane, polystyrene, vinyl chloride, polypropylene, polyethylene, etc., whose elastic modulus is lower than that of the vibration-proof rubber sheets 4, 5a, 5b. Has been. The specific gravity of the foam material 6 is about 0.05.

  As shown in FIG.1 (c) and FIG.2 (c), the foam material 6 is a elongate thin board, and the holes 7 and 8 are provided in two places. The thickness of the foam material 6 is the same as or similar to the thickness of the vibration-proof rubber sheets 5a and 5b. Moreover, the opening shape of the holes 7 and 8 of the foam material 6 is formed in a shape (rectangle) that can just accommodate the anti-vibration rubber sheets 5a and 5b. Further, the foam material 6 has a side shape that can be accommodated in the case member 3. The foam material 6 is elastically deformed to such an extent that the elastic deformation of the anti-vibration rubber sheets 5a and 5b is not hindered.

  Next, the foam material 6 will be described with reference to FIGS. 1B and 1C and FIGS. 2B and 2C. The upper surface 6a of the foam material 6 is integrally fixed to the lower surface 2b of the sleeper body 2 with an adhesive. As the adhesive, for example, “ESLON # 600” which is a product of Sekisui Chemical Co., Ltd. is used.

  The lower surface 6 b of the foam material 6 is integrally fixed to the upper surface of the bottom wall 3 a of the case member 3 with an adhesive. The area of the hole 7 and the hole 8 in the foam material 6 is smaller than the area of other regions. In each figure, the length of the foam material 6 is drawn considerably shorter than the length in the width direction due to space limitations. Therefore, the areas of the holes 7 and 8 are depicted relatively large.

  A wide area excluding the holes 7 and 8 of the foam 6 is bonded and fixed to the bottom wall 3 a of the case member 3. Therefore, even if the adhesive strength of the adhesive is relatively weak, it is easy to obtain an adhesive strength (product of the adhesive area and the adhesive strength of the adhesive) that overcomes the weight of the case member 3. As the adhesive for fixing the foam material 6 to the sleeper body 2 and the case member 3, the same one as described above is employed.

In the case member 3, the foam material 6 is disposed on the bottom wall 3 a, and the anti-vibration rubber sheet 4 ( Elastic member) is arranged without a gap. The anti-vibration rubber sheets 5 a and 5 b are fitted into the holes 7 and 8 of the foam material 6 and are in close contact with the load support portions 9 and 10 on the lower surface 2 b of the sleeper body 2.
The anti-vibration rubber sheets 4, 5 a and 5 b are not bonded to the case member 3.

  When the foam material 6 shown in FIGS. 1 and 2 is employed, if the foam material 6 is bonded to the lower surface 2 b of the sleeper body 2, the holes 7 and 8 of the foam material 6 are positioned at the load support portions 9 and 10 of the sleeper body 2. Is placed. Therefore, the vibration proof rubber sheets 5a and 5b can be aligned with the load support portions 9 and 10 simply by arranging the vibration proof rubber sheets 5a and 5b in the holes 7 and 8, respectively. Further, the foam material 6 is continuous, and adhesion to the lower surface 2b of the sleeper body 2 is easy.

  When both ends of the sleeper 1 having the above-described configurations are supported and lifted by a construction machine (not shown), a state as shown in FIG. 4 is obtained. When lifting the sleeper 1, a rope may be hung near both ends of the sleeper 1, or a hanging metal fitting may be fixed to the upper surface 2 a of the sleeper main body 2 and pulled up through the wire to the hanging metal fitting.

  In the sleeper 1, the bottom wall 3 a of the case member 3 is integrally fixed to the lower surface 2 b of the sleeper body 2 via the foam material 6 (FIG. 3). Therefore, the bottom wall 3a is hardly deformed, and accordingly, the side wall 3b of the case member 3 is hardly deformed. That is, the side wall 3b stands up and down and is parallel to the bending direction (downward) due to the weight of the sleeper 1 itself. Therefore, the side wall 3b (portion extending in the longitudinal direction) functions as a rib that suppresses the bending of the bottom wall 3a.

  As described above, in the present embodiment, the rib function of the side wall 3b of the case member 3 causes the downward bending amount of the case member 3 indicated by the downward arrow in FIG. 4 to be the deflection of the case member 83 of the sleeper 81 shown in FIG. It is smaller than the amount.

  As a result, the formation of a gap between the side surface 2c (anti-vibration rubber sheet 4) of the sleeper body 2 and the side wall 3b (inner surface) of the case member 3 is suppressed.

  The sleeper 1 is transported by a transport device (not shown) and placed on the ballast roadbed 15 shown in FIG. Since the case member 3 is hardly deformed during conveyance, the sleeper tree 1 is disposed between the side surface 2c (vibration-proof rubber sheet 4) of the sleeper body 2 and the side wall 3b of the case member 3 in a state of being arranged on the ballast road floor 15. There is no gap. Therefore, even if a coagulant (fresh concrete) is flowed in the vicinity where the sleeper tree 1 is laid, the coagulant does not enter the sleeper tree 1. That is, the coagulant is prevented by the vibration-insulating rubber sheet 4 between the sleeper body 2 and the case member 3 and does not enter the sleeper 1. Therefore, the elastic function of the vibration-proof rubber sheets 4, 5a, 5b is maintained well. In addition, in FIG. 5, depiction of the fasteners of the sleepers 1 and the rails 11 and 12 is omitted.

Next, when the sleeper 1 is maintained, when the sleeper 1 is removed from the ballast road floor 15 and a force is applied in a direction to separate the sleeper main body 2 and the case member 3, the foam material 6 is formed as shown in FIG. It is destroyed and both are separated. That is, when the adhesive strength of the adhesive is strong, the foam material 6 is destroyed when the sleeper body 2 and the case member 3 are pulled apart with a force larger than the weight of the case member 3.
The foam material 6 is replaced with a new one together with the vibration-proof rubber sheets 4, 5 a and 5 b, and the sleeper 1 can be reused.

  Further, when the adhesive force of the adhesive for adhering the foam material 6 and the case member 3 or the foam material 6 and the sleeper body 2 is weak, as shown in FIG. 7A or FIG. The sleeper main body 2 and the case member 3 are separated without breaking the material 6. In the state shown in FIG. 7A, the state in which the foam material 6 is fixed to the lower surface 2 b side of the sleeper body 2 is maintained. In the state shown in FIG. The state of being fixed to the bottom wall 3a side is maintained. When the sleeper main body 2 and the case member 3 are separated, the foam material 6 is fixed to the sleeper main body 2 or the case member 3 depending on the adhesive strength between the foam material 6 and the sleeper main body 2. It is influenced by the adhesive strength between the foam material 6 and the case member 3. When the foam material 6 is not destroyed, the foam material 6 can be reused.

  As shown in FIG. 3, the sleeper tree 1 does not have a gap 91 like the sleeper tree 81 of FIG. 13 between the sleeper body 2 and the case member 3. That is, by placing (filling) the foam material 6 in the area of the gap 91 shown in FIG. 13, there is no gap in the sleeper 1 shown in FIG. Therefore, there is no room for rainwater or foreign matter to enter the sleeper tree 1. Therefore, the anti-vibration rubber sheets 4, 5a, and 5b are not easily deteriorated, and the elastic function is favorably maintained.

  FIGS. 9A and 9B show a modification of the sleeper 1 shown in FIGS. As shown in FIG. 9 (a), the anti-vibration rubber sheets 19 and 20 (elastic members) are disposed on the lower surface 2 b (load support portions 9 and 10) of the sleeper body 2, and the lower surface 2 b of the sleeper body 2. The foam materials 21, 22, and 23 are bonded to the portions other than the load support portions 9 and 10 with an adhesive. The anti-vibration rubber sheets 19 and 20 are made of the same material as the anti-vibration rubber sheets 5a and 5b shown in FIG. The foam materials 21, 22, and 23 are made of the same material as the foam material 6 shown in FIG.

  The anti-vibration rubber sheets 19 and 20 shown in FIG. 9 have larger dimensions in the width direction (direction perpendicular to the longitudinal direction) of the sleeper body 2 than the anti-vibration rubber sheets 5a and 5b shown in FIG. Therefore, it can adhere to the sleeper main body 2 in a larger area than the vibration-proof rubber sheets 5a and 5b, and can provide a high vibration-proof effect.

  Further, when the side wall 3b of the case member 3 of the sleeper 1 opens to the outside to some extent as shown in FIG. 14, it is preferable to use a binding band 13 as shown in FIG. . FIG. 8 shows a state in which three places in the longitudinal direction of the sleeper 1 are bound by a binding band 13. When the sleeper 1 is bound by the binding band 13 as described above, it is possible to satisfactorily prevent the side wall 3b of the case member 3 from opening outward when the sleeper 1 is conveyed. The binding band 13 is made of, for example, polyacetal, and preferably has a fastening force of 600 N and a fastening pitch of about 500 mm.

  In the example shown in FIG. 8, three places in the longitudinal direction of the sleeper 1 are bound by the binding band 13, but the number of the binding bands 13 can be arbitrarily selected according to the state of the sleeper 1. Although the width dimension of the binding band 13 is arbitrary, it can be about 10-20 mm, for example. The tightening force of the binding band 13 is desirably 400N to 2000N. According to the inventor's experience, if the tightening force is 400 N or less, it is difficult to obtain a tightening effect. If the tightening force is 2000 N or more, the corner portions of the sleeper body 2 and the case member 3 may be damaged. Will be damaged.

  Furthermore, although the example which arrange | positions the foaming material 6 between the sleeper main body 2 and the case member 3 was shown in the above-mentioned embodiment, this foaming material 6 was abbreviate | omitted and adhesive agent or adhesive material (solid state) was vacated. The sleeper body 2 and the case member 3 may be connected with an adhesive or an adhesive.

  Moreover, you may connect the anti-vibration rubber sheets 5a and 5b and the case member 3 with the adhesive or the adhesive of the comparatively weak adhesive force of the grade which can be peeled.

1 sleeper 2 sleeper body 2a top surface of sleeper body (surface on rail installation side)
2b Lower surface of sleeper body (surface opposite to rail installation side)
2c Sleeper body side 3 Case member (housing)
4 Anti-vibration rubber sheet (elastic body piece)
5a, 5b Anti-vibration rubber sheet (elastic body piece)
6 Foam (filling material)
13 Binding band (binding member)

Claims (5)

A sleeper having a sleeper body supporting a rail for a railway,
A housing having at least one open surface;
Having a plurality of elastic body pieces to ensure vibration isolation of the sleeper body,
The housing accommodates the sleeper main body, and exposes the rail installation side portion of the sleeper main body from the one surface side,
At least on the opposite side to the rail installation side in the sleeper main body, the elastic piece is disposed at each position separated in the gauge direction,
The sleeper body and the housing are integrally connected via an adhesive applied or filled in a portion excluding each elastic piece.   A filler member having an elastic coefficient equal to or less than that of the elastic piece is disposed between the elastic pieces arranged at positions spaced apart in the gauge direction, and the adhesive is filled with the sleeper body and the filler. The sleeper according to claim 1, wherein the sleeper is applied between the member and the casing and the filling member.   The sleeper according to claim 1 or 2, wherein the elastic piece and the casing are connected with an adhesive or adhesive having lower adhesive strength than the adhesive.   The sleeper according to any one of claims 1 to 3, wherein the sleeper body and the casing are made of a resin foam reinforced with long glass fibers.   The sleeper according to any one of claims 1 to 4, wherein the sleeper body and the casing are bound together by a binding member.

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