JP2001220703A - Connecting structure and connecting method for composite sleeper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure enough bending strength even in a position having the weakest bending strength, and obtain enough bending strength only by adhesion of a member made of composite wood without using a metal as a member for securing the connecting strength or by only driving a resin pin while eliminating the complicatedness of positioning a connecting position in a job site. SOLUTION: In this connecting structure of the composite sleeper, the longitudinal end parts of two or more composite sleepers 1a, 1b are butt-jointed against each other. The connecting ends of the synthetic sleepers 1a, 1b are connecting parts 2a, 2b shaped to be complementary to each other, and the connecting parts 2a, 2b are provided extendedly from the ends in the longitudinal direction over a designated length. A reinforcement member 3 longer than the connecting parts 2a, 2b is provided to cover the connecting parts 2a, 2b of the composite sleepers 1a, 1b on the upper surfaces, the lower surfaces, or at least one side of both sides of the composite sleepers 1a, 1b, and the reinforcement member 3 is bonded to the surfaces of both composite sleepers 1a, 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure and a connecting method of a synthetic sleeper for obtaining a long sleeper used for a branch portion of a railway track or the like, and more particularly, to a connecting structure of a resin reinforced with a long fiber. The present invention relates to a connection structure and a connection method of a synthetic sleeper made of so-called synthetic wood.

[0002]

2. Description of the Related Art Generally, at a branch portion of a railway track,
Type of branch (single-sided branch, double-sided branch, split branch, jump-over branch, double branch, three branch, three-wire branch, diamond crossing, shisa crossing, etc.)
A long sleeper as long as 6 to 9 m is required, depending on the situation.

However, in an overcrowded urban area, an elevated section, or a place surrounded by a soundproof wall, if the above-mentioned long sleepers of 6 to 9 m are integrally treated, workability is inevitably reduced. Replacement work becomes extremely difficult.

For this reason, a connection structure of a sleeper has been used in which the ends of a sleeper are abutted from above and below, and this portion is sandwiched from above and below by an iron plate having a bolt insertion hole, and the iron plate is inserted through the iron plate and fastened with a bolt nut. ing.

By the way, the present applicant manufactures and sells a sleeper using synthetic wood made of a thermosetting resin foam reinforced with long fibers instead of a general-purpose beech wood or the like. Various improvements have been made to date so that excellent flexural strength can be obtained even when JIS is used (for example, JP-A-6-248604, JP-A-6-240601, JP-A-5-98601). JP, JP-A-5-51901, JP-A-4-1493
No. 02).

However, in the case of the conventional connection structure of these composite sleepers, there is a large difference in bending strength depending on the position in the longitudinal direction of the composite sleeper. Therefore, there is an inconvenience that the connecting portion between the composite sleepers must be positioned at the site for each individual sleeper, and if the positioning is not performed in this manner, insufficient strength may be concerned.

In order to improve such a problem, the present applicant has already proposed a technique disclosed in Japanese Patent No. 2809997. According to the connection structure of the synthetic sleeper, the synthetic sleepers can be connected to each other with a sufficient bending strength comparable to the original bending strength of the solid synthetic sleepers, and the bending stress is applied to the joint portion where the strength is insufficient. In this case, sufficient bending strength can be exhibited even when bending stress is applied from both upper and lower directions. Therefore, when laying a long sleeper having such a structure, there is an advantage that the construction can be performed without troublesome positioning of each sleeper on site so that the track does not overlap the joint.

[0008]

However, in the connection structure disclosed in Japanese Patent No. 2809997, the metal bolts and washers are exposed on the upper surface of the connection portion, and the tie plate and the like are fixed to the sleeper. It interferes with driving nails and dog nails. In particular, it is desirable that the attachment position of the tie plate for each sleeper is not constant in a sea crossing or the like, and that a screw nail or the like can be driven into an arbitrary position on the site.

Therefore, the present invention can secure a sufficient bending strength even at the position where the bending strength is the weakest, and can eliminate the trouble of locating the connection position in the field while securing the connection strength. It is an object of the present invention to provide a connection structure of a synthetic wood sleeper which can obtain a sufficient bending strength only by bonding a synthetic wood member or driving a synthetic wood pin without using metal as a member for performing the operation. And

[0010]

In order to achieve the above object, the present invention takes the following technical measures. That is, the present invention relates to a connection structure of a composite sleeper which is connected by abutting and bonding two or more synthetic sleepers in longitudinal direction end portions, wherein the connected end portions of the composite sleeper have complementary shapes. The connecting portion is provided over a predetermined length in the longitudinal direction from the end portion, and the reinforcing member longer than the connecting portion is provided so as to cover the connecting portion of the synthetic crossties. The reinforcement member is provided on at least one of the upper surface, the lower surface, or both side surfaces of the composite sleeper, and the reinforcing member is bonded to the surfaces of both the composite sleepers. In addition, the complementary connection portion can be in various forms, and has a columnar shape having substantially the same cross-section as the original cross-section in a state where both connection portions are joined by uneven fitting or tapered surface butt. I just need. Further, the reinforcing member may be formed of a rectangular bottom plate or a side plate, or may be formed of an angle member obtained by integrally molding the bottom plate portion and the side plate portion. Further, it is preferable that the fiber direction of the reinforcing member is along the longitudinal direction of the sleeper. Further, in the present invention, an adhesive is used for joining each member. However, after the application, until the adhesive hardens and exhibits the desired adhesive strength (for example, all day and night), a fastening tool such as a giant clam is used. The reinforcing member is fastened to the synthetic sleeper by using, and the fastening tool can be removed after the desired adhesive strength is obtained. In the present specification, the “longitudinal direction of the sleeper” is a direction orthogonal to the railway track, the “width direction of the sleeper” is a direction parallel to the railway track, and the “thickness direction of the sleeper” refers to the vertical direction. Shall be.

According to the connection structure of the present invention, the following effects can be obtained. That is, since the material of the reinforcing member is made of the same type of synthetic wood as the synthetic sleeper, a large adhesive strength can be obtained by the plastic adhesive without using a metal fixing jig such as a bolt, and the entire joint area can be obtained. Practically sufficient bending strength can be obtained. Therefore, even when used for shisa crossing, etc., since metal is not used for the structural members, screw nails and dog nails can be driven into arbitrary positions, which hinders the work of mounting the tie plate for supporting the rail. Not even.

Further, since the bonding surfaces of the connecting portions of the synthetic sleepers have a predetermined width in the longitudinal direction, the cutting positions of the long fibers embedded in the synthetic sleepers are dispersed in the longitudinal direction, and the longitudinal length is reduced. Most of the long fibers in the longitudinal section at an arbitrary position in the direction can be provided with a tensile stress supporting action, and a large bending strength can be obtained. Since the number of long fibers capable of supporting the tensile stress in the vicinity of the distal end of the connection portion is minimized, the bending strength of the portion is relatively small, but a reinforcing plate is disposed on the lower surface side or both side surfaces of the portion. Thereby, it becomes possible to support the tensile stress even by the long fibers of the reinforcing plate, and as described above, the bonding strength of the bonding surface between the reinforcing plate and the synthetic wood, which has an effect of transmitting this tensile force to the sleeper, as described above. By making it sufficiently large, it is possible to obtain practical strength while being easy to construct with a simple structure.

As the synthetic sleepers, those made of resin pillars reinforced with long fibers can be used. In addition, the connection part shape of the pair of synthetic sleepers is, for example, processing one synthetic sleeper end into a tapered surface having a substantially vertical tip end face, and forming the other synthetic sleeper end into a taper of one synthetic sleeper. It can be processed into a tapered surface with a substantially vertical tip end surface that is complementary to the surface, and these synthetic sleepers can be abutted at the tip end surface, and these end surfaces can be bonded together with an adhesive. It may be shaped.

In the connection structure of the present invention, a reinforcing pin made of a resin molded product can be driven over the reinforcing member and each sleeper. According to this, even before the adhesive bonding the reinforcing member to the synthetic sleeper is hardened and exhibits sufficient adhesive strength, the reinforcing pin has the shear strength of the bonding surface between the reinforcing member and the synthetic sleeper. In addition, since the reinforcing pin is also made of a resin molded product, preferably synthetic wood, it is possible to drive a screw nail or the like into a portion where the reinforcing pin is driven. The resin molded product is preferably made of synthetic sleepers or synthetic wood (long fiber reinforced resin foam) of the same type as the reinforcing member, but an appropriate product such as one molded only with a thermosetting resin is used. be able to. In order to further improve the strength, the reinforcing member is bonded to two or more surfaces of both side surfaces and upper and lower side surfaces, and the reinforcing pin is driven over the reinforcing member bonded to each surface and one or both of the sleepers. Is preferred.

[0015] It is also possible to drive a reinforcing pin made of a resin molded product over both the reinforcing member and the pair of crossties. According to this, not only the bonding surface between the reinforcing member and the synthetic sleeper but also the shear strength of the bonding surface between the pair of synthetic sleepers can be improved by the reinforcing pin, and the bending strength is further improved. Becomes possible. Such a reinforcing pin is particularly suitable when the joint surface between the connecting portions of the pair of synthetic sleepers is a tapered surface inclined in the thickness direction along the longitudinal direction, or in a case where both connecting portions are fitted vertically. It can be suitably used.

The above-described connection structure can be constructed by various methods. For example, the reinforcing member can be bonded to a synthetic sleeper at a construction site, and previously bonded and fixed to one of the synthetic sleepers at a factory or the like. You can keep it. A preferred method of joining the composite sleepers is to form the longitudinal ends of the two composite sleepers to be connected to each other in a mutually complementary shape, and to attach the synthetic wood to at least one of the upper surface, the lower surface, or both side surfaces of one of the composite sleepers. The reinforcing member consisting of is bonded in advance, and is projected from one end of one synthetic sleeper so as to be able to contact at least one of the upper surface, the lower surface, or both side surfaces of the other synthetic sleeper. Attach the end joining surfaces of the synthetic sleeper, bond the surface where the other synthetic sleeper is in contact with the reinforcing member, and drive in a reinforcing pin made of a resin molded product so as to reach the synthetic sleeper from the reinforcing member surface. It is characterized by the following. According to this, since the reinforcing member and one of the synthetic sleepers are bonded in advance at a factory or the like, sufficient bonding strength has already been obtained at the time of on-site construction, and the bonding strength with the other synthetic sleeper is reinforced. Since the pin can be reinforced, a practical bending strength can be obtained even before the adhesive is cured.

In the above joining method, preferably, one reinforcing member is previously bonded to one of the synthetic sleepers, and another reinforcing member having a position different from that of the one reinforcing member is also attached to the other synthetic sleeper. Are bonded in advance. According to this, even after the construction, one of the reinforcing members is firmly adhered to the synthetic sleeper, so that a sufficiently large bending strength can be obtained.

Further, the present invention is a connection structure of a composite sleeper which is connected by abutting and bonding longitudinal ends of two or more composite sleepers, wherein the connected ends of the composite sleepers are connected to each other. The connection portions are complementary to each other, and the connection portions are provided over the predetermined length in the longitudinal direction from the end portions, and are formed by resin molding over both synthetic sleepers constituting the connection portion of the synthetic sleeper. A reinforcing pin made of a product is driven in. According to this, even before the adhesive bonding the connection portions of the pair of synthetic sleepers is hardened and exhibits sufficient bonding strength, the reinforcing pin has the shear strength of the bonding surface between the connection portions. In addition, since the reinforcing pin is also made of a resin molded product, preferably synthetic wood, it is possible to drive a screw nail or the like into a portion where the reinforcing pin is driven. In addition,
The reinforcing pin is preferably driven after the adhesive is applied to the surface, which makes it possible to maximize the tensile strength in the axial direction of the reinforcing pin, and further bending the connection between the synthetic woods. Strength can be improved.

Furthermore, since the bonding surfaces of the connecting portions of the synthetic sleepers have a predetermined width in the longitudinal direction, the cutting positions of the long fibers embedded in the synthetic sleepers are dispersed in the longitudinal direction, so that the longitudinal Most of the long fibers in the longitudinal section at an arbitrary position in the direction can be provided with a tensile stress supporting action, and a large bending strength can be obtained. In addition, since the number of long fibers capable of supporting the tensile stress in the vicinity of the tip of the connection portion is minimized, the bending strength of the portion is relatively small,
By adhering a reinforcing plate made of synthetic wood to the lower surface side or both side surfaces of the portion over both sleepers, it becomes possible to support the tensile stress by the long fibers of the reinforcing plate, and transmit this tensile force to the sleeper. The bonding strength of the bonding surface between the reinforcing plate and the synthetic wood, which exerts the effect of the above, increases since it is made of the same kind of material, and it is possible to obtain practical strength while being easy to construct with a simple structure.

In this connection structure, the plurality of reinforcing pins are arranged so that the intersection between the joint surface between the composite sleepers and the plurality of reinforcing pins is displaced in the longitudinal direction of the composite sleeper and in any one of the width direction and the thickness direction. It may be one that is driven so as to shift. According to this, when a large concentrated load acts on the longitudinal position where the bending strength becomes the smallest (that is, near the tip of the connection portion), the bending stress changes depending on the longitudinal position of the sleeper, so that it can withstand fracture. Although the adhesive strength that can be obtained also varies depending on the position in the longitudinal direction, the bending stress generated in the crossties is reduced by shifting the plurality of intersections shifted in the longitudinal direction in the width direction and / or the thickness direction. Because the pin's tensile and compressive strength is generally greater than the shear strength,
The bending strength of the connecting portion can be effectively improved.

The present invention also relates to a connection structure of a composite sleeper connected by abutting and bonding two or more longitudinal ends of a composite sleeper, wherein the longitudinal ends connected to the composite sleeper are connected. Are connected to each other in a width-wise complementary shape, the connection is provided over a predetermined length in the longitudinal direction from the end, and the ends are further provided with an uneven fitting structure in the thickness direction. Is characterized. According to this, at the connecting portion tip position where the long fiber capable of supporting the tensile stress is minimized, by further bonding in the uneven fitting structure in the other direction, the cutting position of the long fiber at the connecting portion tip is changed in the longitudinal direction. And the number of long fibers capable of supporting the tensile stress in the cross section can be increased, and together with the improvement of the mechanical strength due to the above-mentioned concave-convex fitting, the practical bending strength at the connection portion can be increased by bolts or the like. Can be obtained without using.

Further, according to the present invention, the longitudinal ends of the pair of synthetic sleepers which are joined to each other are formed as connecting portions having mutually complementary shapes, and the connecting portions have a predetermined width in the longitudinal direction. In the connection structure of the synthetic sleeper in which the joining surfaces of the portions are bonded in abutting state, a reinforcing member made of synthetic wood is provided on the lower surface side and / or both side surfaces of the sleeper, and the reinforcing member is a pair of sleepers. Adhered to both surfaces, the longitudinal width of the reinforcing member is made larger than the longitudinal width of the connecting portion of the sleeper, and the connecting portion is located inside the longitudinal ends of the reinforcing member in plan view. It can also be. Here, it is assumed that a reinforcing pin made of a resin molded product is driven over the reinforcing member and each sleeper, or a reinforcing pin made of a resin molded product is driven over both the reinforcing member and the pair of sleepers. It can also be.

Further, according to the present invention, the pair of synthetic sleepers are connected to each other at their longitudinal ends, each of which is a connecting portion having a shape complementary to each other, and the connecting portion has a predetermined width in the longitudinal direction. In the connection structure of the synthetic sleeper in which the joining surfaces of the parts are bonded in abutting state, the reinforcing pin made of a resin molded product may be driven over both of the connecting portions of the pair of synthetic sleepers. . Here, a plurality of the reinforcing pins are provided, and a plurality of intersections between the joint surface between the pair of composite sleepers and any two or more reinforcing pins are shifted in the lateral direction, and also in the width direction of the sleeper (front-back direction) and thickness. It may be shifted in at least one direction in the vertical direction (vertical direction).

Further, according to the present invention, the longitudinal ends of the pair of synthetic sleepers which are joined to each other are each a connecting portion having a complementary shape in the width direction, and the connecting portion has a predetermined width in the longitudinal direction, In a connection structure of a synthetic sleeper in which the joining surfaces of these two connecting portions are bonded in abutting state, at least the joining surfaces on both ends in the longitudinal direction of the two connecting portions have an uneven fitting structure in a longitudinal section. It can also be.

Further, in the joining method of the composite sleeper according to the present invention, the longitudinal ends to be joined to each other in the pair of the composite sleepers are formed in complementary shapes to each other, and the lower surface and / or both side surfaces of one of the composite sleepers are formed. A reinforcing member made of synthetic wood is previously adhered, and the reinforcing member is projected from an end of one of the synthetic sleepers so as to be able to face the lower surface and / or both side surfaces of the other synthetic sleeper. At the time of construction, the joining surfaces of the ends to be joined of the pair of synthetic sleepers are bonded in abutting state, and the reinforcing member is bonded to the lower surface and / or both side surfaces of the other synthetic sleeper, and the reinforcing member and at least the other side are bonded. A reinforcing pin made of a resin molded product may be driven into the synthetic sleeper.

In the present invention described above, the same material as the synthetic sleeper can be used as a raw material of the reinforcing member. The synthetic wood used as the raw material of the synthetic sleepers and the reinforcing members can be formed of a resin reinforced with long fibers buried in the longitudinal direction (this is referred to as “synthetic wood”). Can be formed by embedding a thermosetting resin foam in the longitudinal direction. Further, the synthetic sleeper may be formed from the above-mentioned synthetic wood alone, but the synthetic sleeper can also be formed from a composite material in which a plate made of synthetic wood, a resin foam or the like is vertically stacked. In addition, the density of the synthetic sleepers is generally 0.
It is 6 to 1.0 g / cm ³ , and the content of long fibers as a reinforcing material can be about 40 to 60% by weight.
Either inorganic or organic long fibers may be used, but glass fibers are preferably used. As the thermosetting resin foam, a hard polyurethane resin or a hard polyester resin can be suitably used.

[0027]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a connection structure and a joining method of a synthetic sleeper according to an embodiment of the present invention. In the figures, 1a and 1b show a pair of synthetic sleepers. As the synthetic sleepers 1a and 1b, a columnar body made of a long glass fiber reinforced resin composite material can be suitably used. In addition, the reinforcing long fiber directions of the synthetic sleepers 1a and 1b are aligned in the longitudinal direction (the longitudinal direction of the sleeper). These synthetic sleepers 1
The longitudinal ends of the a and 1b joined to each other are connected to each other as connecting portions 2a and 2b having complementary shapes. In the present embodiment, the connection portions 2a, 2b of the two synthetic sleepers 1a, 1b
The joining surfaces are machined into a male and female tapered surface, and the tip surfaces of the connecting portions 2a and 2b are machined substantially vertically. Thus, the joint surfaces are sleepers 1a, 1b
Has a predetermined width in the longitudinal direction.

More specifically, the connecting portion 2a of one of the synthetic sleepers 1a is formed in a tapered surface whose lower surface is gradually inclined upward toward the front end. The upward inclination angle of the tapered surface is 9 ° in the illustrated example, but may be a desired angle. The width in the thickness direction of the tapered surface is preferably about one third of the width in the thickness direction of the sleeper 1a. In addition, the distal end surface of the connection portion 2a is located at the upper end of the sleeper 1a. The connecting portion 2b of the other synthetic sleeper 1b is formed as a tapered surface whose upper surface is gradually inclined downward toward the tip end, and this tapered surface is formed at an angle that matches the tapered surface of the one synthetic sleeper 1a. Have been. In addition, the tension transmission between the long fibers whose cut ends face each other with the tapered surface as a boundary, the tension of one fiber is transmitted as a matrix to the other fibers that are topologically bridged between the cut ends, A path mainly transmitted from the other fiber to the other fiber is mainly used, and the efficiency of the tension transmission increases as the other fiber wraps deeper between the fiber ends. Therefore, the smaller the taper angle is, the more advantageous in transmitting the tension.

Then, an adhesive is applied to the joint surfaces (that is, the tapered surface and the substantially vertical surface) of the two connecting portions 2a and 2b of the pair of synthetic sleepers 1a and 1b, and the joined surfaces are abutted and adhered. I have. The adhesive is not particularly limited as long as it can bond the bonding surface between the synthetic sleepers 1a and 1b. Examples of the adhesive include a long fiber and a thermosetting resin foam constituting the synthetic sleeper. It can be appropriately selected according to the material. For example, when the synthetic sleeper is composed of long glass fibers and a hard urethane resin foam, an epoxy resin can be suitably used as the adhesive.

A reinforcing plate 3 made of synthetic wood is provided on the lower surfaces of the pair of synthetic sleepers 1a and 1b. The reinforcing plate 3 is a plate material having a rectangular shape in a plan view, in which the direction of long fibers as the reinforcing material is aligned in the longitudinal direction. This reinforcing plate 3 is adhered to both lower surfaces of the pair of synthetic sleepers 1a and 1b with an adhesive. The width in the longitudinal direction of the reinforcing plate 3 is larger than the width in the longitudinal direction (the longitudinal dimension of the tapered surface in the illustrated example) of the connection portions 2a and 2b. Further, in a plan view, the connection portions 2 a and 2 b are located at the center inside the both ends in the longitudinal direction of the reinforcing plate 3.
Therefore, the reinforcing plate 3 is bonded to both the sleepers 1a and 1b across the joint between the pair of synthetic sleepers 1a and 1b exposed on the lower surface side, and the reinforcing plate 3 is connected to the pair of synthetic sleepers 1a and 1b exposed on the upper surface side. The joints between the synthetic sleepers 1a and 1b are also adhered so as to straddle the seam in plan view.

In this embodiment, the connection portions 2a, 2b
At a position outside the longitudinal direction, the reinforcing plate 3 and each sleeper 1a,
1b, a reinforcing pin 4 made of glass fiber reinforced resin is driven in the thickness direction, and a reinforcing pin 3 made of glass fiber reinforced resin is formed on both the reinforcing plate 3 and both connecting portions 2a, 2b of the pair of sleepers 1a, 1b. 5 are driven in the thickness direction. When the reinforcing pins 4 and 5 are driven, an adhesive is applied to the reinforcing pins 4 and 5 to effectively use the axial strength of the pins 4 and 5 to bend the connecting portion between the synthetic sleepers. The strength can be further improved.

The reinforcing pins 5 are driven into a plurality of locations (two locations in the illustrated example) in the longitudinal direction, and the sleepers 1a, 1b
1 (b), and the intersection of the joint surface and the right reinforcement pin 5 in FIG. 1 (b) is such that the joint surface extends along the longitudinal direction. Because of the vertical inclination, these intersections are also displaced in the thickness direction.

In the connection structure according to the above embodiment, FIG.
Although the breaking load becomes the smallest at the portion where the concentrated load P is applied to (b), according to the test of the present inventors, a breaking load of 13 tf or more could be obtained.

The above-mentioned connection structure can be constructed by an appropriate construction procedure, but preferably, the following joining method can be used. That is, as shown in FIG. 3, the reinforcing plate 3 is previously bonded to the lower surface of one synthetic sleeper 1a in a factory or the like, and the reinforcing plate 3 can be in contact with the lower surface of the other synthetic sleeper 1b at the time of on-site construction. So that it protrudes from the end of one synthetic sleeper 1a. A hole 6 in the thickness direction is formed at a position where the reinforcing pins 4 and 5 are driven. Then, at the time of on-site construction, an adhesive is applied to the joining surfaces of the ends of the synthetic sleepers 1a and 1b to be joined, and the joining surfaces are joined by butting. At this time, the above-mentioned butting can be performed by bringing the other synthetic sleeper 1b close to the other synthetic sleeper 1b while sliding the same in the horizontal direction, and appropriately cutting the end of the connection portion 2b of the other synthetic sleeper 1b. By keeping the distal end portion from abutting against the proximal end portion of the connecting portion 2a of the one sleeper 1a, the tapered surfaces can be reliably contacted with each other, and a strong connection can be achieved by the wedge effect of the tapered surface. Can be performed. Further, an adhesive is also applied to the contact surface between the reinforcing plate 3 and the other sleeper 1b, and these contact surfaces are bonded to each other. Thereafter, the reinforcing pins 4 and 5 are sequentially driven into the holes 6 to complete the construction. In this case, the reinforcing pin 4 penetrating the reinforcing plate 3 and one of the sleepers 1a is used.
Can be driven in advance in a factory or the like. In addition, to ensure that the adhesive strength after construction is expressed,
It is preferable that the reinforcing plate 3 is pressed against the sleepers 1a and 1b by a fastening tool such as a gilt until the adhesive is hardened.

According to such a joining method, the bonding area at the site can be reduced, so that the number of working steps can be reduced, the laying and rectification of the ties can be performed quickly, and the one tie 1a and the reinforcing plate 3 is already in a strongly bonded state at the time of construction, and the part bonded at the site can be given strength by the shear strength or tensile strength of the reinforcing pin 4, and the practical strength immediately after construction Therefore, it is possible to suitably carry out the work at night.

The reinforcing plate 3 can be bonded to the other synthetic sleeper 1b in advance, and the one synthetic sleeper 1a can be positioned and bonded to this.

Next, a connection structure according to the embodiment shown in FIGS. 4 and 5 will be described. The same components as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The effect will be described.

In this embodiment, a reinforcing member is different from that of the first embodiment. That is, the reinforcing member of the present embodiment includes a first reinforcing member 3a having an L-shaped cross section provided from the lower surface side to the rear side surface of both sleepers 1a, 1b, and both sleepers 1a, 1b.
Rectangular plate-shaped second reinforcing member 3 provided on the front side of the vehicle
b. The first reinforcing member 3a includes sleepers 1a, 1b
A bottom plate 7 which is in contact with the lower surface of the second member in the width direction and also in contact with the lower end surface of the second reinforcing member 3b;
b a rear plate portion 8 which is in contact with the rear side surface over the entire length in the thickness direction.
Are integrally formed. In addition, connection section 2
The reinforcing pins 4 on the outside in the longitudinal direction of the a and 2b are driven so as to penetrate from above the sleepers 1a and 1b to the bottom plate portion 7 of the first reinforcing member 3a as in the first embodiment. Reinforcing pins 4 are also driven in from the front side of one of the composite sleepers 1a so as to penetrate the second reinforcing member 3b and the one of the composite sleepers 1a. A reinforcing pin 4 is also driven in from the rear side of the other synthetic sleeper 1b so as to penetrate the other synthetic sleeper 1b.

According to the connection structure of this embodiment, the second reinforcing member 3 is a side plate having a long cross section in the thickness direction.
A large second moment of area is obtained by the b and the rear plate portion 8, and it is possible to further improve the bending strength. In addition, the second reinforcing member 3b and the rear plate portion 8 extend over the joint between the synthetic sleepers 1a and 1b, and
Since it is bonded to the side surface b, excessive stress is prevented from acting on the entire bonding surface, and cohesive failure and interface failure of the adhesive are prevented from occurring.

The connection structure of this embodiment can also be obtained by various joining methods. For example, as shown in FIGS. 6 to 8, the first reinforcing member 3a is previously bonded to one of the synthetic sleepers 1a. At the same time, the second reinforcing member 3b is bonded in advance to the other synthetic sleeper 1b side, and the joining surface between the two synthetic sleepers 1a and 1b, the joining surface between the first reinforcing member 3a and the other synthetic sleeper 1b at the construction site, Further, an adhesive is applied to the joint surface between the second reinforcing member 3b and one of the synthetic sleepers 1a, and the two are joined by butt-bonding, and the reinforcing pins 4 and 5 are sequentially driven into the holes 6 for driving pins. It is possible to It is also possible to bond the reinforcing members 3a, 3b to both the sleepers 1a, 1b during construction on site.

In the embodiment shown in FIG. 4, the other sleeper 1b and the bottom plate 7 are located outside the connecting portions 2a and 2b in the longitudinal direction.
Although no reinforcing pin is provided to penetrate through the hole, it is needless to say that such a reinforcing pin can be driven as shown in FIG.

In the connection structure according to the embodiment shown in FIG. 10, the joint surface between the connecting portions 2a and 2b of the two composite sleepers 1a and 1b is composed of a vertical surface 10 along the width direction which is displaced in the longitudinal direction and a sleeper. A vertical surface 11 is located substantially at the center in the width direction of 1a and 1b and extends along the longitudinal direction. One of the vertical surfaces 10 is continuous from the center position in the width direction to the front end, and
The other 0 is continuous from the center position in the width direction to the rear end, and both vertical surfaces 10 are continuous via the vertical surface 11.
That is, each connection part 2a, 2b is substantially columnar,
a, 1b are divided at the center in the width direction, and one connecting portion 2a is located on the rear side, and the other connecting portion 2b is located on the front side. By combining these, the sleepers 1a, 1b The same cross-sectional area is obtained.

Reinforcing plates 3c, 3d and 3e made of synthetic wood are provided on the lower surface side and both side surfaces (front and rear side surfaces) of both synthetic sleepers 1a and 1b, respectively. These reinforcing plates 3c, 3d, 3e have the same width in the longitudinal direction, and constitute a reinforcing member having a generally U-shaped upper opening. Moreover, it is driven into a desired position of the reinforcing pin 4 extending between each reinforcing plate 3c, 3d, 3e and the composite sleeper 1a, 1b,
The use of the reinforcing pin 4 prevents excessive shear stress from acting on the bonding surface.

The connection structure of the present embodiment can also be obtained by an appropriate joining method. For example, as shown in FIGS. 11 to 13, a reinforcing plate 3e on the back side is previously bonded to one of the crossties 1a, and the other is The reinforcing plate 3c on the front side and the reinforcing plate 3d on the lower side are previously bonded to the sleeper 1b. Further, the positioning pin 12 is driven into the connection portion 2b of the sleeper 1b on the vertical surface 11 side in the longitudinal direction, and the positioning pin insertion hole 13 is formed in the side surface of the connection portion 2a of the sleeper 1a opposed thereto. . Further, a pin driving hole 6 is appropriately drilled at a position where the reinforcing pin 4 is driven.

Then, at the construction site, an adhesive is applied to each bonding surface, and the pair of crossties 1a, 1b are abutted from the width direction so that the positioning pins 12 are fitted into the holes 13, so that both the crossties 1a, 1b are joined. Glue. Thereafter, the reinforcing pins 4 are sequentially driven into the reinforcing pin driving holes 6 to complete the construction.

The connection structure according to the embodiment shown in FIG. 14 is different from the connection structure shown in FIG.
The reinforcing plate 3f is also bonded to the upper surface of 1b. The width direction dimension of the upper surface reinforcing plate 3f is a size obtained by adding the thickness of the front and rear reinforcing plates 3d and 3e to the width direction size of the sleepers 1a and 1b. The reinforcing plates 3d and 3e are bonded to the upper end surfaces. Furthermore, in the present embodiment, the reinforcing pins 4 driven in the thickness direction in particular penetrate from the reinforcing plate 3f on the upper surface side to the reinforcing plate 3c on the lower surface side. Since a ramen structure is obtained, the bending strength of the connection portion can be sufficiently increased.

This connection structure can also be obtained by an appropriate method. For example, as shown in FIGS. 15 to 17, either one of the reinforcing plates 3c and 3f on the upper surface side and the lower surface side and both sides in the width direction are provided. Any two reinforcing plates 3e, 3f of the surface side reinforcing plates 3d, 3e are bonded to one sleeper 1a in advance, and the other two reinforcing plates 3c, 3d are bonded to the other sleeper 1b in advance. In addition, it is possible to bond the sleepers 1a and 1b and the reinforcing plates 3c, 3d, 3e and 3f by applying an adhesive and butting them together at the site. Further, by using the connection structure shown in FIG. 14, the breaking strength was 20 tf, and practical strength was obtained. In addition, it is possible to obtain sufficient strength immediately after construction.

The connection structure according to the embodiment shown in FIGS. 18 and 19 is different from the connection structure shown in FIG. 4 in that plate-like reinforcing plates 3c, 3d, and 3e are provided on the lower surface side and both side surfaces in the width direction, respectively.
And reinforcing plates 3c, 3d, 3e are connected to both sleepers 1a, 1
b, and an upper surface reinforcing plate 3f that is bonded to the upper surfaces of both the sleepers 1a, 1b across the seam exposed on the upper surface side of the sleepers 1a, 1b. The upper surface reinforcing plate 3f is fitted into a concave portion 14 provided on the upper surfaces of both the sleepers 1a and 1b so that the upper surface of the reinforcing plate 3f is flush with the upper surfaces of the sleepers 1a and 1b.

As a joining method for obtaining this connection structure, for example, as shown in FIGS. 20 to 22, a rear reinforcing plate 3e and a lower reinforcing plate 3c are previously bonded to one of the sleepers 1a. Front reinforcing plate 3 on the other synthetic sleeper 1b side
d in advance, and both synthetic sleepers 1
By applying an adhesive to each of the joint surfaces a and 1b, the joint surface between the reinforcing plates 3c and 3e and the other synthetic sleeper 1b, and the joint surface between the reinforcing plate 3d and the one synthetic sleeper 1a, and butting them together. An adhesive is applied to the lower surface of the upper surface reinforcing plate 3f which has been previously processed into a rectangular plate shape, and the concave portion 14 is formed.
To fit. In addition, it is preferable that an adhesive is applied to and bonded to a joint between the reinforcing plates. The construction is completed by sequentially driving the reinforcing pins 4 and 5 into the holes 6 for driving pins.

The connection structure according to the embodiment shown in FIG. 23 is different from the connection structure shown in FIG.
1b is provided with an upper surface reinforcing plate 3f bonded over both upper surfaces. This reinforcing plate 3f is provided with both sleepers 1a,
1b is fitted into a concave portion 14 formed above the connecting portions 2a and 2b, and the upper surface thereof is flush with the upper surfaces of the sleepers 1a and 1b. The reinforcing pins 4 in the thickness direction are
Because it penetrates over the upper and lower reinforcing plates 3c and 3f,
With the reinforcing structure of these four reinforcing plates and the reinforcing pins 4, it is possible to obtain a sufficiently large bending strength without using bolts or the like.

In this connection structure, as shown in FIG. 24 to FIG. 26, each reinforcing plate is bonded to one of the crossties appropriately in advance, so that each reinforcing plate is bonded to the other crossties during on-site construction. Only by reducing the bonding work area, the working time can be shortened, and a sufficient strength can be obtained immediately after construction. The breaking strength at this time was 19 tf.

The connection structure according to the embodiment shown in FIG.
The connecting portions 2a and 2b of the both sleepers 1a and 1b are the same as the connecting structure shown in FIG. 10, and only the reinforcing plate 3c on the lower surface side is adhered, and the reinforcing pins are not driven. Even with such a connection structure, 12 tf was obtained as the breaking load P at the weakest part, and practical strength was obtained.

The connection structure according to the embodiment shown in FIG.
Instead of the positioning pin 12 of the connection structure shown in FIG. 27, a substantially columnar embedded block 15 fitted into a concave portion 16 formed on the side surface of both connecting portions 2a and 2b of both sleepers 1 is used. As this block 15, the synthetic sleeper 1
It is preferable to use the same type of material as described above, and it is preferable to use a long fiber reinforced thermosetting resin foam. Further, in the present embodiment, in order to facilitate the fitting of the block 15 and to improve the bending strength by shifting the cutting position of the long fiber in the longitudinal direction, the vertical surface 11 in the longitudinal direction is formed. It is composed of a tapered surface inclined in the width direction.

According to the present embodiment, the shear strength in the direction along the tapered surface 11 can be sufficiently increased by the block 15, and the bending strength of the connection portion can be greatly improved.

The connection structure according to the embodiment shown in FIG.
27 is an improvement of the connection structure shown in FIG.
The vertical surfaces 10 in the width direction constituting the joining surfaces of the b are dispersed at four locations in the longitudinal direction, and the connection portions 2a and 2b are formed so that the width in the width direction decreases stepwise toward the distal end. A reinforcing pin 4 driven over the reinforcing plate 3c bonded to the lower surface side and the one of the composite sleepers 1a forms a connecting portion 2
It is provided on the base end side (outside in the longitudinal direction) with respect to a and inside the connection portion 2a.

In this connection structure, the reinforcing plate 3c is previously bonded to the other synthetic sleeper 1b side in a factory or the like, and the reinforcing plate 3c is bonded to the lower surface of the one synthetic sleeper 1a in the field work. Preferably, the pin 4 is driven. According to this, the reinforcing plate 3c and the other sleeper 1
b is bonded in advance, so that a sufficiently large bonding strength is obtained even immediately after construction on site, and even before the adhesive bonding the reinforcing plate 3c and one of the sleepers 1a is completely cured, the reinforcing pin 4 is used. Since a shear stress acting on the bonding surface is supported, a sufficient bending strength can be obtained.

In the embodiment shown in FIG. 30, the reinforcing pins 4 are driven in the longitudinal direction outside of the connecting portions 2a and 2b, respectively. According to this, even when the reinforcing plate 3c is bonded to the lower surfaces of both the sleepers 1a and 1b by on-site construction, a sufficient bending strength can be obtained after the construction.

In the embodiment shown in FIG. 31, there is no reinforcing pin driven over the reinforcing plate 3c and each of the crossties 1a and 1b, and the connecting portion 2a of one of the crossties 1a (1b) is not provided.
(2b) connecting portion 2 between tip and other sleeper 1b (1a)
The reinforcing pin 5 is driven over the base end of b (2a). According to this, the long fiber of one sleeper from the long fiber of the other sleeper via the reinforcing pin 5 near the distal end of the connecting portion where the bending strength decreases due to the decrease in the long fiber capable of supporting the tensile stress. , The tensile stress can be transmitted efficiently, and together with the reinforcing effect of the reinforcing plate 3c, a large bending strength can be obtained over the entire length of the long sleeper in the longitudinal direction.

Further, as shown in FIG. 32, by piercing the reinforcing pin 4 extending between the reinforcing plate 3c on the lower surface side and the sleeper 1a, it is possible to obtain a sufficiently practical bending strength immediately after construction.

The connection structure according to the embodiment shown in FIG.
In the connection structure shown in FIG. 10, the reinforcing plate 3c on the lower surface side
And the reinforcing plates 3d and 3e on both sides in the width direction are reinforced by the reinforcing pins 4 for only one of the crossties 1a and 1b. It is. When such a connection structure is employed, it is preferable that the reinforcing plates 3d and 3e are previously bonded to the sleepers on which the reinforcing pins 4 are not driven.

In the connection structure according to the embodiment shown in FIG. 34, the reinforcing member has a cross section L formed by a plate-like portion bonded to the front side surfaces of the sleepers 1a and 1b and a plate-like portion bonded to the front side of the lower surface.
A first reinforcing member 3g integrally formed in the shape of a letter and a sleeper 1
a, a second reinforcing member 3h integrally formed in an L-shaped cross section from a plate-shaped portion bonded to the rear side surface and a plate-shaped portion bonded to the rear side of the lower surface. I have. In order to support the shearing stress of the bonding surfaces of the reinforcing members 3g and 3h, the above-described reinforcing pins can be driven into appropriate places, and in the illustrated example, the first reinforcing member 3g is used.
The reinforcement pin 4 extending between the second reinforcement member 3h and the other sleeper 1b is driven in the width direction. In this case, it is preferable that the first reinforcing member 3g and the second reinforcing member 3h are bonded to the other sleeper 1b side and the one sleeper 1a side in a factory or the like in advance before the on-site construction.

Further, the butting portion 20 of the first reinforcing member 3g and the second reinforcing member 3h on the lower surface side of the sleepers 1a and 1b is formed in a longitudinal direction which forms a joint surface between both connecting portions of the sleepers 1a and 1b. Are displaced in the width direction with respect to the vertical plane 10 along. As described above, by shifting the joining surface of each member in the width direction or the longitudinal direction, any member can support bending stress or tensile stress at an arbitrary point and increase the minimum bending strength.

The connection structure according to the embodiment shown in FIG.
The connection structure shown in FIG. 33 is obtained by removing the reinforcing plate on the lower surface side.
A strength of tf was obtained.

The connection structure according to the embodiment shown in FIG.
There is no reinforcing member bonded to the surfaces of the sleepers 1a, 1b, and the reinforcing pins 5 made of a resin molded product (preferably synthetic wood) are used to connect the two connecting portions 2a, 2 of the pair of synthetic sleepers 1a, 1b.
b. The reinforcing pin 5 in the illustrated example is driven in the width direction from both side surfaces of the distal end portions of the connection portions 2a and 2b.
Can be driven in an appropriate direction, such as a thickness direction, depending on the bonding surface structure. Further, the connection unit 2 of the present embodiment
a, 2b are connected to a plurality of vertical surfaces 1 along the width direction.
1 and these vertical surfaces 11 are arranged displaced in the longitudinal direction. In addition, the joining surface has a vertical surface 10 extending along the longitudinal direction connecting the ends of the vertical surfaces 11, and in the present embodiment, the vertical surface 10 is parallel to the longitudinal direction. 38, a plurality of reinforcing pins 5 can be driven in the longitudinal direction as shown in FIG. 38, and a plurality of rows of reinforcing pins 5 can be driven in the thickness direction. . In addition, as shown in FIG. 39, the vertical surfaces 11 on both ends of the bonding surface can be tapered. In this case, it is preferable to drive the reinforcing pins 5 in the longitudinal direction range of the tapered surface. According to this, a plurality of intersections between each reinforcing pin 5 and the joining tapered surface are shifted in the width direction and the longitudinal direction, Effective reinforcement by the reinforcement pins 5 can be performed.

FIGS. 40 to 43 show a pair of synthetic sleepers 1a, 1a.
b are connected to each other in the widthwise direction to form connection portions 2a and 2b which are joined to each other in the longitudinal direction.
a, 2b have a predetermined width in the longitudinal direction, and are bonded in such a manner that the joining surfaces of the two connecting portions 2a, 2b are abutted with each other, and at least a part of the joining surface of the two connecting portions 2a, 2b. Shows various embodiments of a connection structure having a concave-convex fitting structure in a vertical cross section.

In the embodiment shown in FIG. 40, each sleeper 1a,
A rectangular recess 21 is formed in the middle of the distal end surfaces of the connecting portions 2a, 2b in the thickness direction, and substantially the same shape is formed in the middle of the end surfaces of the other sleepers 1b, 1a facing the recess 21 in the thickness direction. A rectangular recess 22 is formed.
A rectangular block 23 made of synthetic wood is applied to an adhesive 22 and fitted therein, thereby obtaining the above-mentioned uneven fitting structure. In addition, the joining surface of the connection parts 2a and 2b is
A vertical surface 10 comprising a tapered surface which is located substantially at the center in the width direction of the sleepers 1a and 1b and which is inclined in the width direction;
A vertical surface 11 extending outward in the width direction from both ends of the
The block 23 is located substantially at the center of the vertical surface 11 in the width direction in the thickness direction.

In the embodiment shown in FIG. 41, one of the sleepers 1
In the middle part of the joining end face of the connecting portion 2a in the thickness direction, a recess 22 is formed over the entire length of the joining surface, and in the middle part in the thickness direction of the joining end face of the connecting portion 2a of the other sleeper 1b,
2 are formed over the entire length of the joint surface, and are adhered in a state where the convex portions 24 are fitted into the concave portions 22.

In the embodiment shown in FIG. 42, there is no difference except that the vertical surface 10 in the connection structure shown in FIG. 40 is not a tapered surface but is parallel to the longitudinal direction. Omitted.

In the embodiment shown in FIG. 43, the connection portions 2a,
2b is formed in a step-like shape in which the width in the width direction is gradually reduced toward the front end side, and a rectangular protrusion 25 protruding toward the front end side is formed in the middle of the front end portion in the thickness direction. A rectangular recess 22 into which the protrusion 25 can be fitted is formed on the end face of the sleeper, and the connecting portion 2 having such a structure is formed.
a, 2b is coated with an adhesive and joined to each other,
The protrusion 25 is fitted in the recess 22.

According to each of the embodiments shown in FIGS. 40 to 43, a so-called two-way fitting structure,
1b is a connecting path for transmitting the tensile stress between the long fibers.
A desired bending strength can be obtained without providing a reinforcing plate or the like by ensuring the vicinity of the end portions of a and 2b.

The sleepers, reinforcing members and reinforcing pins are preferably made of glass fiber reinforced plastic foam (synthetic wood). As the type of the foamed resin in the foam, for example, a hard thermosetting resin such as urethane, epoxy resin, vinyl ester resin, unsaturated polyester resin, and phenol resin, which is preferably used. In order to improve the compressive strength and reduce the cost in the foamed resin, inorganic fillers such as calcium carbonate, gypsum, talc, aluminum hydroxide, and clay, and lightweight bones such as shirasu balloons, pearlite, and glass balloons are used. A material may be added.

The fiber for reinforcing the foam may be any of inorganic fibers such as glass fiber, carbon fiber and metal fiber, and organic fibers such as natural fiber and synthetic fiber. Glass fiber is suitable in terms of properties. Examples of the glass fiber include a glass roving, a glass roving cloth, a glass mat, and a continuous strand mat. This fiber may be used alone, or two or more layers may be laminated,
Also, long fibers and short fibers may be mixed and used. In addition,
Glass long fibers were aligned in the longitudinal direction to form reinforcing fibers,
Glass long fiber reinforced hard urethane foam (for example, manufactured by Sekisui Chemical Co., Ltd., trade name "Eslon Neo Lumber FF
U ”) is most preferable in terms of weight reduction, durability and workability.

[0074]

According to the present invention, a long branch sleeper can be constituted only by a member such as synthetic wood which is easy to cut and pierce without using a metal fixing member such as a bolt. For example, it is possible to drive a screw nail or the like for fixing the tie plate at an arbitrary position in the longitudinal direction of the sleeper, and it is not necessary to perform a complicated operation such as adjusting the position of the connection portion according to the site, In addition, it is possible to improve the minimum bending strength to at least a level that can be practically used. In particular, by using the same type of material as the synthetic sleeper as the reinforcing member, it is possible to obtain excellent adhesive strength between these members, and further, it is possible to secure the shear strength of the bonding surface immediately after construction by the reinforcing pin, The present invention can be suitably applied to the sleeper rectification within a limited time at night.

[Brief description of the drawings]

FIG. 1 shows a connection structure of a synthetic sleeper according to a first embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

FIG. 2 is an exploded view of a composite sleeper used for construction of the connection structure, wherein (a) is a front view of one of the composite sleepers, and (b)
Is a front view of the other synthetic sleeper.

FIG. 3 is an exploded perspective view of a pair of synthetic sleepers for explaining a joining method for constructing the connection structure.

4A and 4B show a connection structure for a composite sleeper according to a second embodiment of the present invention, wherein FIG. 4A is a plan view, FIG. 4B is a front view, and FIG.

FIG. 5 is a sectional view taken along line AA of FIG.

6A and 6B show one synthetic sleeper used for construction of the connection structure according to the second embodiment, wherein FIG. 6A is a front view and FIG. 6B is a side view.

7A and 7B show another synthetic sleeper used for construction of the connection structure, wherein FIG. 7A is a front view and FIG. 7B is a side view.

FIG. 8 is an exploded perspective view of a pair of synthetic sleepers for explaining a joining method for constructing the connection structure.

9A and 9B show a connection structure for a composite sleeper according to a third embodiment of the present invention, wherein FIG. 9A is a plan view and FIG. 9B is a front view.

FIG. 10 shows a connection structure for a composite sleeper according to a fourth embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

11A and 11B show one synthetic sleeper used for construction of the connection structure, wherein FIG. 11A is a plan view, FIG. 11B is a front view, and FIG. 11C is a side view.

12A and 12B show another synthetic sleeper used for construction of the connection structure, wherein FIG. 12A is a plan view, FIG. 12B is a front view, and FIG. 12C is a side view.

FIG. 13 is an exploded perspective view of a pair of synthetic sleepers for explaining a joining method for constructing the connection structure.

14A and 14B show a connection structure for a composite sleeper according to a fifth embodiment of the present invention, wherein FIG. 14A is a plan view and FIG. 14B is a front view.

15A and 15B show one of the composite sleepers used for construction of the connection structure, wherein FIG. 15A is a plan view, FIG. 15B is a front view, and FIG. 15C is a side view.

16A and 16B show another synthetic sleeper used for construction of the connection structure, wherein FIG. 16A is a plan view, FIG. 16B is a front view, and FIG. 16C is a side view.

FIG. 17 is an exploded perspective view of a pair of synthetic sleepers for explaining a joining method for constructing the connection structure.

FIG. 18 shows a connection structure for a composite sleeper according to a sixth embodiment of the present invention, wherein (a) is a plan view, (b) is a front view, and (c).
Is a side view.

FIG. 19 is a sectional view taken along line BB of FIG. 18;

FIG. 20 shows one synthetic sleeper used for construction of the connection structure according to the sixth embodiment, where (a) is a front view and (b) is a side view.

21A and 21B show another synthetic sleeper used for construction of the connection structure, wherein FIG. 21A is a side view and FIG. 21B is a front view.

FIG. 22 is an exploded perspective view of a pair of synthetic sleepers for explaining a joining method for constructing the connection structure.

FIG. 23 shows a connection structure for a composite sleeper according to a seventh embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

24A and 24B show one synthetic sleeper used for construction of the connection structure, wherein FIG. 24A is a plan view, FIG. 24B is a front view, and FIG. 24C is a side view.

FIG. 25 shows another synthetic sleeper used for construction of the connection structure, wherein (a) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 26 is an exploded perspective view of a pair of synthetic sleepers for explaining a joining method for constructing the connection structure.

FIG. 27 shows a connection structure for a composite sleeper according to an eighth embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

FIG. 28 shows a connection structure for a composite sleeper according to a ninth embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

FIG. 29 shows a connection structure for a composite sleeper according to a tenth embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

FIG. 30 shows a connection structure for a composite sleeper according to an eleventh embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

FIG. 31 shows a connection structure for a composite sleeper according to a twelfth embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

32A and 32B show a connection structure for a composite sleeper according to a thirteenth embodiment of the present invention, wherein FIG. 32A is a plan view and FIG. 32B is a front view.

FIG. 33 shows a connection structure for a composite sleeper according to a fourteenth embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

34A and 34B show a connection structure for a composite sleeper according to a fifteenth embodiment of the present invention, wherein FIG. 34A is a plan view and FIG. 34B is a front view.

FIG. 35 shows a connection structure for a composite sleeper according to a sixteenth embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

36A and 36B show a connection structure for a composite sleeper according to a seventeenth embodiment of the present invention, wherein FIG. 36A is a plan view and FIG. 36B is a front view.

FIG. 37 shows a connection structure for a composite sleeper according to an eighteenth embodiment of the present invention, where (a) is a plan view and (b) is a front view.

FIG. 38 shows a connection structure for a composite sleeper according to a nineteenth embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

FIG. 39 shows a connection structure for a composite sleeper according to a twentieth embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

FIG. 40 shows a connection structure for a composite sleeper according to a twenty-first embodiment of the present invention, where (a) is a plan view and (b) is a front view.

FIG. 41 shows a connection structure for a composite sleeper according to a twenty-second embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

42A and 42B show a connection structure for a composite sleeper according to a twenty-third embodiment of the present invention, wherein FIG. 42A is a plan view and FIG. 42B is a front view.

FIG. 43 shows a connection structure for a composite sleeper according to a twenty-fourth embodiment of the present invention, where (a) is a plan view and (b) is a front view.

[Explanation of symbols]

1a, 1b Synthetic sleepers 2a, 2b Complementary connecting parts 3, 3a, 3b,... Reinforcing members 4 Reinforcing pins driven over reinforcing members and synthetic sleepers 5 Driven over pairs of synthetic sleepers connected to each other Reinforcement pin

Claims (7)

[Claims] 1. A connection structure for a composite sleeper connected by abutting and bonding longitudinal ends of two or more composite sleepers, wherein the connected ends of the composite sleepers have complementary shapes. A connection portion, wherein the connection portion is provided over the predetermined length in the longitudinal direction from the end portion, and a reinforcing member longer than the connection portion is provided so as to cover the connection portion of the composite sleeper. A connection structure for a composite sleeper, wherein the reinforcing member is provided on at least one of an upper surface, a lower surface, and both side surfaces, and the reinforcing member is adhered to surfaces of both the composite sleepers. 2. The connecting structure according to claim 1, wherein a reinforcing pin made of a resin molded product is driven into the synthetic sleeper from the surface of the reinforcing member. 3. A reinforcing pin made of a resin molded product is inserted from one surface of the reinforcing member through one synthetic sleeper constituting the connecting portion to the other, and reaches the other synthetic sleeper. 3. The connection structure of the synthetic sleeper according to 2. 4. A connection structure for a composite sleeper connected by abutting and bonding longitudinal ends of two or more composite sleepers, wherein the connected ends of the composite sleepers have complementary shapes. A connecting portion, wherein the connecting portion is provided over the predetermined length in the longitudinal direction from the end portion, and a reinforcing member made of a resin molded product extends over both synthetic sleepers constituting the connecting portion of the synthetic crossties A connection structure for a synthetic sleeper, which has a pin driven therein. 5. The plurality of reinforcing pins such that the intersection between the joint surface between the synthetic sleepers and the plurality of reinforcing pins is shifted in the longitudinal direction of the synthetic sleeper and in one of the width direction and the thickness direction. 5. The connection structure of a synthetic sleeper according to claim 4, wherein the connection structure is driven. 6. A connection structure of a composite sleeper connected by abutting and bonding longitudinal ends of two or more composite sleepers, wherein the longitudinal ends to which the composite sleepers are connected have a width which is different from each other. A connection portion having a complementary shape in the direction, the connection portion is provided over a predetermined length in the longitudinal direction from the end portion, and the end portions have a concave-convex fitting structure with each other in the thickness direction. A connection structure for a synthetic sleeper, characterized in that: 7. The longitudinal ends of the two synthetic sleepers to be connected are each formed in a complementary shape to each other, and a reinforcement made of synthetic wood is provided on at least one of the upper surface, the lower surface, or both side surfaces of one of the synthetic sleepers. The members are bonded in advance and are projected from the ends of one of the composite sleepers so that they can be in contact with at least one of the upper surface, the lower surface, or both side surfaces of the other synthetic sleeper. The end joining surfaces are bonded together, the other synthetic sleeper and the surface where the reinforcing member is in contact with each other are bonded together, and a reinforcing pin made of a resin molded product is driven into the synthetic crossties from the reinforcing member surface. And synthetic sleepers connection method.