JP4944488B2 - Sleeper tree and method for manufacturing sleeper tree - Google Patents

Description

  The present invention relates to a sleeper that can be formed by being connected, and a method for manufacturing the sleeper.

The sleepers generally used have a long shape in which the length in the long direction is longer than that between the gauges, and the long direction is arranged substantially perpendicular to the rail direction, and each sleeper is fastened to two rails.
And when a train passes on a rail, the same sleeper receives the force which receives from the wheel of both sides via each rail.

In the rail branching section and the like, a long sleeper tree is used because the track is installed in a wider range than a normal portion.
However, a long sleeper is heavier than a normal sleeper and is difficult to handle. Therefore, a sleeper that can be divided and connected when laid is used. Further, even a sleeper tree having a normal length can be easily transported and arranged as long as it can be divided. Therefore, a sleeper tree that can be formed by being connected may be used.
Such pillows are described in Patent Document 1.

JP 2002-285502 A

  In such a sleeper, the strength of the connecting portion is likely to be lowered, and thus the structure is not easily lowered in strength. In particular, the strength of the connecting portion is made as high as possible with respect to the force that causes a large force during use.

  The effect of reducing the strength of the connecting portion is large when a force that pulls in the direction in which the joint surface separates or when a shearing force acts in a direction along the joint surface.

  On the other hand, among the forces acting on sleepers, the force acting in the direction in which the long direction curves upward or downward tends to increase, so there is a force to pull and compress in the long direction and shear force in the horizontal plane. Especially easy to grow.

And in the sleeper of patent document 1, by making the joint surface of a connection part slant, the area of a joint surface is enlarged, the tensile strength of a elongate direction is enlarged, and also by shifting a joint surface from a horizontal surface direction. The shear strength in the horizontal plane direction is high.
Further, by forming a concave portion and a convex portion on each of the joint surfaces, and fitting the convex portions into the concave portions, displacement at the joint surface is prevented and the strength is further increased.

In the case of the sleeper as in Patent Document 1, a concave portion and a convex portion are formed on each joint surface, and the concave portion and the convex portion are fitted together at the time of connection. The direction in which the surfaces are brought together is limited, and the workability in the connecting work may be reduced.
In addition, the larger the convex part, the greater the reinforcing effect, but conversely, the larger the convex part, the lower the workability, and it is difficult to ensure high workability while ensuring workability. Met.

  Furthermore, the convex portions and concave portions of the joint surface are processed separately. However, in order to align these positions, high-precision processing is necessary, and the processing is difficult. Therefore, what can be processed easily is desired.

  Then, this invention makes it a subject to provide the sleeper which can be conveyed in the divided | segmented state, can be formed by connecting, and can make it high intensity | strength by making it difficult to shift | deviate by a joint surface. .

The invention described in claim 1 for achieving the above object is a sleeper formed by connecting a plurality of main body members, and each main body member has a joint surface parallel or inclined in the longitudinal direction. And a concave portion extending in the width direction or the thickness direction is formed on the joint surface, and the joint surfaces are connected so as to match each other, and the reinforcing plates are arranged on both sides so as to sandwich the joint portion. In the connected state, the reinforcing plates are constrained in the direction in which the joint surfaces are separated from each other, the recesses are joined together to form a displacement prevention member arrangement space, and the displacement prevention member A displacement prevention member is disposed in the arrangement space, and the displacement prevention member is a sleeper characterized in that it can prevent displacement of the joint surfaces in the direction along the joint surface.

  According to the first aspect of the present invention, the plurality of main body members having the joint surfaces in which the concave portions are formed are connected so as to match the joint surfaces. Are combined to form a displacement prevention member arrangement space, and the displacement prevention member is disposed in the displacement prevention member arrangement space, so that the displacement prevention member can prevent the joint surfaces from being displaced with higher strength. can do.

  The invention according to claim 2 is the sleeper according to claim 1, wherein the displacement prevention member arrangement space is open to the outside, and the displacement prevention member can be inserted in a connected state.

  According to the second aspect of the present invention, since the displacement prevention member arrangement space is open to the outside, the displacement prevention member can be inserted in a connected state, and the connecting work of the sleepers can be facilitated. it can.

  According to a third aspect of the present invention, a through hole is formed in the reinforcing plate, and the through hole of the reinforcing plate and a displacement prevention member arrangement space form a series of holes, and the series of holes prevents deviation. The sleeper according to claim 1 or 2, wherein a member is inserted.

  According to invention of Claim 3, the reinforcement board which covers a connection part is provided, The through-hole is formed in the said reinforcement board, and the through-hole of a reinforcement board and a shift | offset | difference prevention member arrangement space are a series. Are formed, and the slip prevention member is inserted into the series of holes. Therefore, the slip prevention member can be used as a member for connection.

  According to a fourth aspect of the present invention, the reinforcing plate covers the connecting portion, each reinforcing plate is formed with a through hole, and the through hole of the reinforcing plate and the displacement prevention member arrangement space are a series of. The sleeper according to any one of claims 1 to 3, wherein a hole is formed and a slip prevention member is inserted into the series of holes.

  According to the invention described in claim 4, the reinforcing plates covering the connecting portions are provided so as to be arranged on both sides so as to sandwich the connecting portions, and through holes are formed in each reinforcing plate, Since the through hole of the reinforcing plate and the displacement prevention member arrangement space form a series of holes, and the deviation prevention member is inserted into the series of holes, both sides of the deviation prevention member pass through the reinforcement plate. By being inserted into the hole, the displacement prevention member is further less likely to be displaced, and the strength can be increased.

  The invention according to claim 5 is characterized in that the cross-sectional shape of the displacement prevention member arrangement space is a circle or a square, and the shape of the displacement prevention member is a cylinder or a prismatic bar shape. It is a sleeper tree described in 1.

  According to the invention described in claim 5, since the cross-sectional shape of the displacement prevention member arrangement space is a circle or a square, and the shape of the displacement prevention member is a cylinder or a prismatic bar shape, It is easy to insert the slip prevention member.

  The invention according to claim 6 is characterized in that the main body member has a long shape, connects end portions in the long direction, and the overall shape is a long shape. It is a sleeper tree in any one of -5.

  According to the invention described in claim 6, the main body member is long and connects end portions in the long direction, and the overall shape is long. In a certain divided state, it can be shortened, and the sleeper tree can be lengthened in the connected state.

  The invention according to claim 7 is a method of manufacturing a sleeper according to any one of claims 1 to 6, wherein a plurality of main body members are formed so as to form a joint surface, and a main body Drilling with the joint surfaces of the members aligned, forming a recess in each joint surface, and aligning the joint surfaces of the body members, inserting the displacement prevention member into the displacement prevention member placement space and connecting And a sleeper manufacturing method characterized by comprising the steps of:

  According to the seventh aspect of the present invention, the method includes the step of drilling in a state in which the joint surfaces of the main body members are aligned and forming the recesses on the respective joint surfaces. Can be done accurately.

  The sleeper of the present invention can be transported in a divided state, can be formed by being connected, can hardly be displaced at the joint surface, and can have high strength.

Hereinafter, specific examples of the present invention will be described.
The sleeper 1 according to the first embodiment of the present invention is shown in FIGS. 1 to 5, and the sleeper 1 is provided with two long body members 10, which are connected to each other. It is formed by.

  The main body member 10 is long and has a square bar shape. In addition, the main body members 10 are connected so that the end portions in the longitudinal direction L of the main body members 10 face each other so that the longitudinal directions L of the main body members 10 are substantially the same direction. Yes. And the whole shape of the sleeper 1 with the main body members 10 connected to each other is long.

As shown in FIGS. 2 to 4, one main body member 10 is provided with a long portion 25 formed with a concave portion 26 and a top plate 10 a. Further, the other body member 10 is provided with a long portion 25 in which a convex portion 27 is formed, a bottom plate 10b, and side plates 10c and 10d.
The top plate 10a of one main body member 10, the bottom plate 10b, and the side plates 10c, 10d of the other main body member 10 are arranged at a connecting portion where the concave portion 26 and the convex portion 27 are connected, It covers the connecting part in the state and functions as a reinforcing plate.

The concave portion 26 and the convex portion 27 of the long portion 25 are end portions of the long portion 25 and are provided at positions where the main body members 10 are connected to each other. And the shape of the concave part 26 and the shape of the convex part 27 are match | combined, and it will be in the state by which the convex part 27 was inserted in the space 26a inside the concave part 26 in the case of connection.
And this connection part becomes a concavo-convex structure seeing from thickness direction T (up-down direction).

  The concave portion 26 is formed with two protruding portions 28 on both sides in the width direction W, and a space 26 a is formed between the protruding portions 28. In the connected state, the convex portion 27 is disposed in the space 26a, and the convex portion 27 is sandwiched between the two protruding portions 28 in the width direction W.

In this connected state, as shown in FIG. 3 and FIG. 5, the surface of the concave portion 26 and the surface of the convex portion 27 are combined, and these surfaces are joint surfaces.
Specifically, the side surfaces 27a and 27b on both sides in the width direction W of the convex portion 27 and the inner side surfaces 28a and 28b that are the inner side surfaces of the protruding portion 28 of the concave portion 26 are combined. In addition, an inner end surface 27 c that is a surface of the end portion in the longitudinal direction L of the protruding portion of the convex portion 27 and an inner end surface 28 c that is a surface between the protruding portions 28 of the concave portion 26 are combined. Further, outer end surfaces 27d and 27e which are outside the protruding portion of the convex portion 27 and are end surfaces in the longitudinal direction L, and the end surface in the longitudinal direction L of the protruding portion 28 of the concave portion 26. The outer end faces 28d and 28e are combined.

  Further, the side surfaces 27 a and 27 b of the convex portion 27 and the inner side surfaces 28 a and 28 b of the concave portion 26 are surfaces along the thickness direction T and the longitudinal direction L. Further, the inner end surface 27c and the outer end surfaces 27d and 27e of the convex portion 27 and the inner end surface 28c and the outer end surfaces 28d and 28e of the concave portion 26 are surfaces along the thickness direction T and the width direction W.

  In the sleeper 1 of the present embodiment, in the connected state, the joint surface of the concave portion 26 of one main body member 10 and the joint surface of the convex portion 27 of the other main body member 10 are combined. These surfaces do not have to be completely adhered, and an adhesive may be interposed between the joining surfaces as will be described later.

  Further, as shown in FIG. 4, a groove-like recess 34 is formed on the joint surface. The concave portion 34 is provided on the side surfaces 27 a and 27 b of the convex portion 27 and the inner side surfaces 28 a and 28 b of the concave portion 26. And the position of the recessed part 34 is match | combined, and as FIG. 5 shows, the recessed part 34 will match | combine in a connection state, and the slip prevention member arrangement | positioning space 35 is formed.

The shape of the concave portion 34 of the sleeper 1 according to the present embodiment is a groove having a semicircular cross section and extends in the thickness direction T. And the shift | offset | difference prevention member arrangement | positioning space 35 formed by combining recessed parts 34 becomes a through-hole with a circular cross section extended in the thickness direction T. As shown in FIG.
Moreover, in each joining surface, the part except the recessed part 34 becomes the same plane shape.

And the through-holes 20 and 21 and the hole 19 are provided in the connection part of the main body member 10. The through hole 20 penetrates in the thickness direction T, and the through hole 21 penetrates in the width direction W. The hole 19 extends in the width direction W and does not penetrate.
The through holes 20 and 21, the hole 19, and the displacement prevention member arrangement space 35 are arranged at positions that do not interfere with each other.

  The top plate 10a of one main body member 10, the bottom plate 10b, and the side plates 10c, 10d of the other main body member 10 are rectangular plates and cover the connecting portions from four directions.

The top plate 10 a is disposed on the upper side of the end portion of the long portion 25 of the one main body member 10. Note that the top surface side of the top plate 10a and the long plate 25 are substantially the same in height and are in the same plane.
The bottom plate 10b and the side plates 10c, 10d are the end portions of the other long portion 25, and are arranged on the lower side and both sides in the width direction W, respectively.

  Through holes 30 and 32 penetrating in the thickness direction T are formed in the top plate 10 a of one main body member 10 and the bottom plate 10 b of the other main body member 10. The positions of the through holes 30 and 32 are aligned with the positions of the through holes 20 and the displacement prevention member arrangement space 35, and a series of through holes 36 and 37 are formed so that the entire sleeper 1 is moved in the thickness direction T. To penetrate.

Similarly, through holes 31 and 33 penetrating in the width direction W are formed in the side plates 10c and 10d. The positions of the through holes 31 and 33 are aligned with the positions of the through hole 21 and the hole 19. A series of through holes 38 are formed by the through holes 21 and the through holes 31 and 33, and the entire sleeper 1 is penetrated in the width direction W. Further, the hole 19 a is formed by each of the hole 19, the through hole 31, and the through hole 33.
This through-hole 38 is located in the overlapping part of the recessed part 26 and the convex part 27, penetrates the two main body members 10, and can perform connection more firmly.

  The rod-shaped members 60, 61, 62, and 63 are inserted into the series of through holes 36, 37, and 38 and the hole 19a. The rod-shaped member 60 is inserted into a series of through-holes 36 penetrating in the thickness direction T formed by the through-holes 20 and the through-holes 30 and 32. The rod-shaped member 61 is inserted into a series of through-holes 37 penetrating in the thickness direction T formed by the displacement prevention member arrangement space 35 and the through-holes 30 and 32. The rod-shaped member 62 is inserted into the through hole 38 that penetrates in the width direction W formed by the through hole 21 and the through holes 31 and 33. The rod-shaped member 63 is inserted into the hole 19 a formed by the through hole 31 and the through hole 33 and the hole 19.

The rod-shaped members 60, 62, and 63 connect the two main body members 10, and connect the two main body members 10 directly or indirectly through a reinforcing plate.
Further, the rod-shaped member 61 is inserted into the through hole 37 penetrating the deviation preventing member arrangement space 35 and functions as a deviation preventing member. In particular, since the through-hole 37 of this embodiment forms a series of holes together with the through-holes 30 and 32 of the top plate 10a and the bottom plate 10b that function as a reinforcing plate, the rod-shaped member 61 not only functions as a displacement prevention member. The main body members 10 can be connected to each other.

In addition, a notch 22 that matches the thickness of the top plate 10 a is formed on the upper side of the connecting portion of the long portion 25 of one main body member 10. When the top plate 10a is fixed, the upper side of the top plate 10a and the upper surface of the main body member 10 are at the same height.
Therefore, since the sleeper 1 has a flat shape with no step on the upper side, it is easy to fasten with the rail when in use.

The material of the main body member 10 and the rod-shaped members 60, 61, 62, 63 is preferably a high-strength and lightweight material. In the present embodiment, a long fiber reinforced resin having continuous fibers is used for the long portion 25 of the main body member 10, and a fiber reinforced polyurethane foam resin is used. And the orientation direction of the fiber of the elongate part 25 of the main body member 10 is directed to the elongate direction L, and when the force acts in the direction in which the elongate direction L curves, the strength can be increased. Further, as the top plate 10a, the bottom plate 10b, the side plates 10c, and 10d, which are reinforcing plates, the above-described fiber-reinforced polyurethane foamed resin, FRP resin, or a material obtained by solidifying a recycled material can be used.
The rod-shaped member 61 used as a displacement prevention member is preferably one having high strength against shearing force, and the above-described fiber reinforced polyurethane foam resin, FRP resin, or a material obtained by solidifying a recycled material with resin is used. Can do.

Next, a method for manufacturing the sleeper 1 will be described.
First, each main body member 10 and rod-shaped members 60, 61, 62, and 63 are processed into a predetermined shape. Further, the body member 10 is provided with through holes 20, 21, 30, 31, 32, 33, which form a series of through holes 36, 37, 38 in a connected state. Need to be positioned. Therefore, the main body member 10 before drilling is temporarily assembled in a connected state, and in this state, drilling is performed to form the through holes 20, 21, 30, 31, 32, 33, thereby accurately positioning. be able to.

The main body member 10 thus formed is brought into a connected state. At this time, an adhesive is disposed on the bonding surface which is the surface of the concave portion 26 or the surface of the convex portion 27. The adhesive is not particularly limited, but in the present embodiment, an epoxy-based adhesive is used, and the adhesive is directly applied.
When the main body member 10 is connected, a series of through holes 36, 37, 38 are formed, and the rod-shaped members 60, 61, 62, 63 are inserted into the through holes 36, 37, 38 and the hole 19a. During the insertion, an adhesive may be applied to the rod-shaped members 60, 61, 62, and 63.

  In addition, when forming the main body member 10 etc. in a factory etc. and performing connection in the laying site, it is necessary to convey the main body member 10 grade | etc.,. In such a case, if the connecting part becomes dirty during transportation, it may become impossible to connect or the strength of the connecting part may be reduced. It is possible to remove and use. In addition, before applying the adhesive, the work is performed so as to remove dust and dirt from the connecting portion.

Then, when the adhesive is solidified, the sleeper 1 is completed.
The sleeper 1 of the present embodiment is provided with the rod-shaped member 61 that serves as a displacement prevention member, so that it is difficult to deviate at the joint surface, and even if the strength expressed by the solidification of the adhesive is insufficient, the strength increases. The strength can be ensured even when the adhesive is not sufficiently solidified.

The sleeper 1 manufactured in this way has a long shape, and the connected parts are longer in the width direction W and the thickness direction T than the other parts, and protrude downward and laterally. Therefore, when the sleeper tree 1 is laid, the road bed resistance can be further increased.
Moreover, since the sleeper 1 has a flat shape without a step on the upper side, it is easy to fasten with the rail at the time of use.

The sleeper 1 according to the present embodiment is manufactured by manufacturing the two main body members 10 and the rod-shaped members 60, 61, 62, 63 in a factory and the like and can carry them to the laying site without connecting the main body members 10. Easy to transport to the site.
Further, the main body members 10 can be easily connected to each other at the laying site. When connected, the main body members 10 are less likely to be displaced at the joining surface and can be made to have high strength. In addition, when preventing the displacement at the joint surface by the displacement prevention member, the effect of preventing the displacement is higher if the structure is constrained in the direction in which the joint surface is separated. In this embodiment, it restrains with respect to the direction from which a joint surface leaves | separates by the side plates 10c and 10d which are a reinforcement board.

  When the main body members 10 are connected to each other at the laying site, they may be placed under the rail in a connected state, but they are placed under the rail without being connected and connected under the rail. Also good.

  In the sleeper 1 of the above-described embodiment, the displacement prevention member (bar-shaped member 61) is a recess in the joint surfaces (side surfaces 27a and 27b, inner side surfaces 28a and 28b of the recessed portion 26) that are parallel to the side plates 10c and 10d. Although it is arranged in the displacement prevention member storage space 35 formed by 34 and the arrangement direction is arranged so as to face the thickness direction T, it may be another direction.

  Then, as shown in FIGS. 6 and 7, the sleeper 2 in the second embodiment of the present invention forms a joint surface so as to be a surface parallel to the width direction W, and a concave portion is formed in this joint surface. 34 can also be formed and a slip prevention member can be arranged.

As with the sleeper tree 1 described above, the sleeper tree 2 is provided with two main body members 10 and is formed by connecting them. Further, one main body member 10 has a long portion 25 and a top plate 10a. The other body member 10 includes a long portion 25, a bottom plate 10b, and side plates 10c and 10d.
The top plate 10a of one main body member 10, the bottom plate 10b, and the side plates 10c, 10d of the other main body member 10 are arranged in a connecting portion to which the step portions 46 and 47 are connected, and are connected in a connected state. It covers the part and functions as a reinforcing plate.

Further, a stepped portion 46 is formed at the connecting portion of the long portion 25 of one main body member 10 (left side in FIG. 7), and a stepped portion 47 is formed at the connecting portion of the other main body member 10 (right side in FIG. 7). Is formed.
The step portion 46 of one body member 10 has a shape in which the upper side has a longer length in the longitudinal direction L than the lower side, and the upper side protrudes, and an upper end surface 46a, a lower end surface 46b, and an upper end surface A horizontal surface 46c is formed between 46a and the lower end surface 46b.
The step 47 of the other body member 10 has a shape in which the upper side has a shorter length in the longitudinal direction L than the lower side, and the lower side protrudes. The upper end surface 47a, the lower end surface 47b, and the upper end surface A horizontal surface 47c is formed between 47a and the lower end surface 47b.

  In the connected state, the upper end face 46a of one main body member 10 and the upper end face 47a of the other main body member 10 are joined, and the lower end face 46b of one main body member 10 and the lower end face of the other main body member 10 are joined. 47b is joined, the horizontal surface 46c of one main body member 10 and the horizontal surface 47c of the other main body member 10 are joined, and these surfaces serve as joint surfaces.

Further, the top plate 10a provided on one main body member 10 protrudes from the upper end surface 46a of the stepped portion 46, the lower surface of the top plate 10a is exposed, and the length of the other main body member 10 is increased. It joins with the upper surface 25a of the scale part 25, and these surfaces also become joint surfaces.
Further, the bottom plate 10b provided on the other body member 10 protrudes from the lower end surface 47b of the stepped portion 47, the upper surface of the bottom plate 10b is exposed, and the length of the one body member 10 is increased. It joins with the lower surface 25b of the scale part 25, and each of these surfaces also becomes a joint surface.

  The sleepers 2 are also formed with recesses 34 that are grooves having a semicircular cross section on their joint surfaces, and in a connected state, these recesses 34 are joined together to form a displacement prevention member arrangement space 35. .

The concave portion 34 of the one main body member 10 includes a horizontal surface 46c, a lower surface of the top plate 10a, a lower surface 25b of the long portion 25, a joint surface facing downward, an upper end surface 46a, and a lower end surface 46b. , Provided on the joint surface facing the other body member 10 side.
Further, the concave portion 34 of the other body member 10 includes a horizontal plane 47c, an upper surface of the bottom plate 10b, an upper surface 25a of the long portion 25, a joint surface facing upward, an upper end surface 47a, and a lower end surface 47b. Is provided on the joint surface facing the one main body member 10 side.

Then, the concave portion 34 formed on one main body member 10 and facing downward is combined with the concave portion 34 formed on the other main body member 10 and facing upward, and the width direction W A displacement prevention member disposition space 35 penetrating therethrough is formed. Further, a concave portion 34 formed on one main body member 10 and facing the other main body member 10 side, and a concave portion 34 formed on the other main body member 10 and facing the one main body member 10 side. And a displacement prevention member arrangement space 35 penetrating in the thickness direction T is formed.
Furthermore, a cylindrical rod-shaped rod-shaped member 80 which is a displacement preventing member is disposed in the displacement preventing member disposing space 35.

Also in the sleeper 2, the main body member 10 can be formed and connected by the same method as the sleeper 1 described above.
And the connected sleeper 2 can be conveyed in the divided | segmented state, and, in the connected state, it is hard to shift | deviate on a joint surface and can be made high intensity | strength.

Furthermore, the sleeper 3 in the third embodiment of the present invention as shown in FIG. 8 can be used.
As with the sleeper 2 described above, the sleeper tree 3 is provided with two main body members 10, and each main body member 10 has a long portion 25 having stepped portions 76 and 77 to be connected. It is formed by. And the step parts 76 and 77 of the sleeper tree 3 are those in which the shape of the step parts 46 and 47 is opposite to the sleeper tree 2 described above.

Specifically, the stepped portion 76 of one body member 10 has a shape in which the upper side has a shorter length in the longitudinal direction L than the lower side and the lower side protrudes, and the upper end surface 76a and the lower end surface 76b and a horizontal plane 76c located between the upper end face 76a and the lower end face 76b are formed.
Further, the stepped portion 77 of the other body member 10 has a shape in which the upper side is longer in the longitudinal direction L than the lower side, and the upper side protrudes, and an upper end surface 77a, a lower end surface 77b, A horizontal surface 77c is formed between the upper end surface 77a and the lower end surface 77b.

  One body member 10 in which the stepped portion 76 is formed is provided with a top plate 10a, and the other body member 10 in which the stepped portion 77 is formed has a bottom plate 10b and side plates 10c and 10d. Is provided.

  The sleepers 3 are also formed with recesses 34, which are semicircular grooves, on the joint surfaces, and in a connected state, the recesses 34 are joined together to form a displacement prevention member arrangement space 35. In addition, although not shown in the displacement prevention member arrangement space 35, a displacement prevention member is inserted.

Also in the sleeper 3, the formation and connection work of the main body member 10 can be performed by the same method as the sleepers 1 and 2 described above.
And the connected sleeper tree 3 can be conveyed in the divided | segmented state, and in the connected state, it is hard to shift | deviate on a joining surface and can be made high intensity | strength.

  In the above-described embodiment, two main body members 10 are connected. However, three or more main body members 10 can be used for connection. And when the 3 or more main body members 10 are connected to the elongate direction L, it can lengthen by connection.

  Further, in the above-described embodiment, the shape of the recess 34 is a semicircular groove, and the displacement prevention member arrangement space 35 formed by joining the recess 34 in the connected state is a circular hole. In addition, the recess 34 may be formed in a square shape such as a triangular shape, and the shift prevention member arrangement space 35 may be formed in another shape such as a square shape.

And although the direction of the joining surface of above-described embodiment was a surface perpendicular | vertical or parallel to the elongate direction L, the width direction W, and the thickness direction T, it may incline with respect to these. The same applies to the direction in which the displacement prevention member arrangement space 35 is formed.
Further, the displacement prevention member arrangement space 35 may be a hole that does not penetrate, and it is sufficient that the displacement prevention member can be inserted.

It is a perspective view of the sleeper tree of the 1st embodiment of the present invention. It is the perspective view which expanded the connection part of the sleeper tree of FIG. It is the perspective view which fractured | ruptured a part of FIG. It is a disassembled perspective view of the sleeper tree of FIG. It is the figure which expanded the connection part of the pillow of FIG. 1, (a) is a top view, (b) is a front view, (c) is a side view. It is the figure which expanded the connection part of the pillow of the 2nd Embodiment of this invention, (a) is a top view, (b) is a front view, (c) is a side view. It is a disassembled perspective view of the connection part of the pillow of FIG. It is a disassembled perspective view of the sleeper tree of the 3rd Embodiment of this invention.

1, 2, 3 Sleeper 10 Main body member 10a Top plate 10b Bottom plate 10c, 10d Side plate 34 Recess 35 Displacement prevention member arrangement space 37 Through hole 46a Upper end surface 46b Lower end surface 46c Horizontal surface 47a Upper end surface 47b Lower end surface 47c Horizontal surface 61 , 80 Bar-shaped member 76a Upper end surface 76b Lower end surface 76c Horizontal plane 77a Upper end surface 77b Lower end surface 77c Horizontal plane

Claims (7)

A sleeper formed by connecting a plurality of body members,
Each main body member has a joint surface that is parallel or inclined in the longitudinal direction,
A concave portion extending in the width direction or the thickness direction is formed on the joint surface, and the joint surfaces are connected so as to match the joint surfaces.
Reinforcing plates are provided on both sides to sandwich the connecting part,
In the connected state, the reinforcing plate is restrained with respect to the direction in which the joint surfaces are separated from each other,
The recesses are joined together to form a displacement prevention member arrangement space, and a displacement prevention member is arranged in the displacement prevention member arrangement space.
A sleeper characterized in that the displacement prevention member can prevent displacement between joint surfaces in a direction along the joint surface.   The sleeper according to claim 1, wherein the displacement prevention member arrangement space is open to the outside, and the displacement prevention member can be inserted in a connected state.   A through hole is formed in the reinforcing plate, and the through hole of the reinforcing plate and the displacement prevention member arrangement space form a series of holes, and the deviation prevention member is inserted into the series of holes. The sleeper according to claim 1 or 2, characterized in that   The reinforcing plate covers the connecting portion, and each reinforcing plate is formed with a through hole, and the through hole of the reinforcing plate and the displacement prevention member arrangement space form a series of holes, The sleeper according to any one of claims 1 to 3, wherein a slip prevention member is inserted into the hole.   The sleeper according to any one of claims 1 to 4, wherein a cross-sectional shape of the displacement prevention member arrangement space is a circle or a square, and the shape of the displacement prevention member is a cylinder or a prismatic rod.   The sleeper according to any one of claims 1 to 5, wherein the main body member has a long shape, connects end portions in the long direction, and has a long overall shape. . A sleeper manufacturing method for manufacturing the sleeper tree according to claim 1,
A step of manufacturing a plurality of main body members so as to form bonding surfaces, a step of drilling in a state in which the bonding surfaces of the main body members are aligned, and forming a recess in each bonding surface, and the bonding surfaces of the main body members And a step of inserting and connecting the displacement prevention member into the displacement prevention member arrangement space.

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