JP2005054469A - Sleeper trees, molded products, how to lay sleeper trees - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sleeper that is inexpensive and can be reduced in weight.
SOLUTION: A long portion 10 extending over the entire length of the sleeper tree and a block portion 11 connected to the long portion 10 are provided. And the block part 11 is located in the lower side of the vicinity which supports a rail, and supports the load from a rail. Further, the width b1 of the long portion 10 in the rail direction is smaller than the width b2 of the block portion 11 in the rail direction. The long portion 10 has a higher tensile strength than the block portion 11, and the block portion 11 has a higher compressive strength than the long portion 10. Further, the long portion 10 is a long fiber reinforced urethane resin, and the direction of the fiber is the longitudinal direction of the sleeper.
[Selection] Figure 1

Description

  The present invention relates to sleepers that support rails.

In general, sleepers are located below the rails of the rails and support the two rails. Usually, the sleepers are in the shape of a long prism, and the sleeper is installed with its longitudinal direction perpendicular to the rail direction. Has been. The rail and the sleeper are fixed by a metal member called a tie plate.
The sleeper is located above the ballast roadway or the concrete roadbed and receives a load when passing through the train.

The sleeper is preferably as light as possible during installation. However, if the size is simply reduced, the strength decreases and the original performance cannot be satisfied.

And as prior art literature information related to the invention of this application, there is the following.
JP-A-10-131103

  Patent Document 1 describes a sleeper that can be reduced in weight.

When a sleeper is used, the frictional part with the roadbed deteriorates due to wear or the like, so it is necessary to replace it after a certain period of use.
Further, if the sleeper trees can be reduced in weight, the workability of the sleeper tree replacement work can be improved, and more sleeper trees can be replaced in a certain time during which the train does not pass, such as at night.

Further, if the waste materials once used can be reused, the resources can be reused, which is environmentally friendly, and sleepers can be manufactured at low cost.

Then, this invention makes it a subject to provide the pillow which can be reduced in weight and can be manufactured more cheaply.

The invention described in claim 1 for achieving the above-described object is a sleeper that is long and is installed on the lower side of the rail, and is a long part extending over the entire length of the sleeper. When,
The sleeper has a block part connected to the long part, and the block part is provided at a position for supporting a load from a rail.

According to the first aspect of the present invention, it is possible to receive a bending or tensile load at the long portion and a compressive load at the block portion.

The long part may be a columnar shape, and the block part may be located below the long part (Claim 2).

The longitudinal direction may be set substantially perpendicular to the rail direction, and the width of the long portion in the rail direction may be smaller than the width of the block portion in the rail direction.

The long part may have a higher tensile strength than the block part (Claim 4). In such a case, the pull strength of the sleeper tree can be increased.

The block member may have a higher compressive strength than the long portion (Claim 5). In such a case, a larger load can be supported.

The long part may be a long fiber reinforced urethane resin, and the direction of the fiber may be the longitudinal direction of the sleeper (Claim 6). In such a case, the pull strength of the sleeper tree can be increased.

The invention according to claim 7 is a sleeper having a container member having a space portion therein and a filler positioned in the space portion, wherein the filler can be changed from a fluid state to a solid state. The sleeper can be manufactured by filling the space with a fluid filler and then changing it into a solid state.

According to the seventh aspect of the present invention, it is possible to manufacture a sleeper tree by filling the hollow portion of the container member with a filler that is a material that can be changed from a fluid state to a solid state. Work can be easily performed at the site, and it is easy to lighten the container member, which facilitates carrying-in to the site, positioning work, and the like.

The space may be located between two rails when a sleeper is installed (Claim 8).
In such a case, there is no interference with the connecting portion of the rail, and the workability is good.

A rail fixing member that can be connected to the rail is provided below the rail, and the rail fixing member and the filler may be disposed in the same space (claim 9). In such a case, the container member and the rail fixing member can be easily joined.

A concave portion is provided on the upper side of the rail fixing member, and a side surface of the concave portion has an inclined portion that is inclined with respect to the rail direction, and a fastening portion that fastens the rail and the rail fixing member is in contact with the inclined portion. What can be fastened in a state may be sufficient (claim 10). In such a case, the rail position can be easily adjusted.

A fixing bolt and an embedded plug, wherein at least one of the embedded plugs is open, and a hole that can be engaged with the fixing bolt is provided; the embedded plug is inserted into a hole provided in a rail fixing member; The fastening portion may be fastened by engaging the fixing bolt and the embedded plug (claim 11). In such a case, it can be firmly fixed by the engagement of the embedded plug and the fixing bolt.

The rail fixing member is provided with a convex or concave engaging portion, and the rail fixing member is arranged until the filler in the space portion changes to a solid state, and the rail fixing member and the filler are arranged by the engaging portion. Can be locked (claim 12). In such a case, the filling portion becomes solid with a shape corresponding to the locking portion, and the strength is increased.

The density of the filler may be larger than the density of the container member (claim 13). In such a case, it can be made heavier with the sleeper laid.

The container member may be foldable (claim 14). In such a case, the container member can be easily carried and the sleeper tree can be easily laid.

The invention according to claim 15 is a sleeper comprising a main body portion and a reinforcing layer, wherein the main body portion is elongated, and the reinforcing layer has a super-stretched sheet attached to the surface of the main body portion. It is a sleeper tree.

According to the invention described in claim 15, the strength can be increased without substantially increasing the sleeper.

The stretching direction of the super-stretched sheet of the reinforcing layer may be oriented in the longitudinal direction of the main body (Claim 1).
6). In such a case, the strength can be efficiently increased against bending and pulling of the sleeper tree.

The main body may be formed by laminating in the vertical direction (claim 17). Moreover, each layer laminated | stacked to an up-down direction may combine several members (Claim 18).

Further, the reinforcing layer is composed of two or more layers, and the super-stretched sheets of each layer may be laminated with the stretching directions orthogonal to each other (claim 19).

The material of the ultra-stretched sheet may be low-density polyethylene, high-density polyethylene, or polypropylene (claim 20).

The sleeper can be manufactured by performing the step of forming the main body and the step of matching the reinforcing layer with the main body on the same line (claim 21). Furthermore, a hot-melt adhesive may be attached to the side of the reinforcing layer to be bonded to the main body, and a heating step may be provided after the reinforcing layer is aligned with the main body (claim 22).

The invention described in claim 23 is a sleeper characterized in that super stretched sheets made of polyethylene are laminated in the vertical direction and the stretching direction is the longitudinal direction.

According to the invention described in claim 23, since the molecules are oriented in the longitudinal direction of the sleeper, the strength can be efficiently increased.

The invention according to claim 24 is made by cutting glass fiber reinforced urethane resin.
It is a molded article characterized in that 0 μm glass urethane powder, a fiber material having an aspect ratio of 50 or more, and a binder material are mixed and compressed to be molded.

The fiber material has a specific strength of 0.4 × 10 ⁶ cm or more and a specific modulus of 36 × 10 ⁶ c.
It may be m or more (claim 25).

As the fiber material, glass fiber, carbon fiber, aramid fiber, polyethylene stretched sheet, polypropylene stretched sheet, or iron wire may be used (Claim 26).

The fiber material may reuse the fiber material used as part of the molded product (claim 27). In such a case, it can be manufactured at low cost.

The binder material may be a thermosetting resin after molding.
). Further, the thermosetting resin may be a urethane resin (claim 29).

The invention according to claim 30 is a molded article which is a foam of hard urethane resin having a reinforcing material, wherein the reinforcing material is a material other than glass fiber, and the shape of the reinforcing material has an aspect ratio of 50. One of the above fiber shape, fiber bundle shape, and sheet shape, and the product Vf · σf of the volume fraction Vf of the reinforcing material and the tensile strength σf of the reinforcing material is 15 kgf / mm ² or more. It is a molded product.

The specific strength of the reinforcing material may be 4 × 10 ⁶ cm or more (claim 31).

The invention described in claim 32 is a molded article that is a foam of hard urethane resin having a reinforcing material, wherein the reinforcing material is a material other than glass fiber, and the shape of the reinforcing material has an aspect ratio of 50. One of the above fiber shape, fiber bundle shape and sheet shape, and the product Vf · Ef of the volume fraction Vf of the reinforcing material and the tensile elastic modulus Ef of the reinforcing material is 600 kgf / mm ² or more. This is a molded product.

The specific elastic modulus of the reinforcing material may be 160 × 10 ⁶ cm or more (Claim 33).

Further, the reinforcing material may be carbon fiber, aramid fiber, polyethylene stretched sheet, polypropylene stretched sheet, or iron wire (Claim 34). Further, the reinforcing material may be one that reuses a fiber material used as a part of a molded product (Claim 35).

  Furthermore, the molded product may be a sleeper (claim 36).

The invention according to claim 37 is a sleeper which is long and is installed on the lower side of the rail with the longitudinal direction being substantially perpendicular to the rail direction, the long part extending over the entire length of the sleeper, and A block portion connected to the elongated portion, the block portion provided at a position for supporting a load from a rail, and the block member using the molded product according to any one of claims 24 to 35. It is a sleeper characterized by

The invention described in claim 38 has a container member having a space portion therein, a filler positioned in the space portion, and a rail fixing member positioned below the rail and connectable to the rail. It is a sleeper, and the filler is a material that can be changed from a fluid state to a solid state, and can be manufactured by changing to a solid state after filling the space with a fluid filler, and The rail fixing member is a sleeper using the molded product according to any one of claims 24 to 35.

In the invention according to claim 39, the rail is previously installed, the rail fixing member is fixed to the rail, the container member is placed on the lower side of the rail so that the rail fixing member is disposed in the space, and then The sleeper laying method according to any one of claims 9 to 14, wherein the space portion is filled with a filler and the rail fixing member and the container member are joined.

The invention according to claim 40 is a method of laying a sleeper tree having a rail fixing member and a container member, wherein the rail is previously installed, the rail fixing member is fixed to the rail, and the rail fixing member is a space portion. The laying method of the sleeper is characterized in that the container member is placed on the lower side of the rail so as to be disposed on the rail, and then the rail fixing member and the container member are joined.

  The sleeper of the present invention can be reduced in weight and can be manufactured at a lower cost.

Hereinafter, the present invention will be described in detail.
FIG. 1 is a perspective view of a sleeper according to a first embodiment of the present invention. FIG. 2 is a plan view of the sleeper according to the first embodiment of the present invention. Drawing 3 is a figure seen from the rail direction in the state where the sleeper of the 1st embodiment of the present invention was installed. FIG. 4 is a view seen from the rail direction in a state in which the sleeper according to the modification of the first embodiment of the present invention is installed. FIG. 5 is a perspective view of a container member according to the second embodiment of the present invention. FIG. 6: is the front view and BB sectional drawing of the sleeper tree of the 2nd Embodiment of this invention. FIG. 7: is the figure and sectional drawing seen from the sleeper tree of the 3rd Embodiment of this invention. FIG. 8 is a cross-sectional view of the sleeper tree according to the fourth embodiment of the present invention. FIG. 9: is the figure and sectional drawing seen from the sleeper tree of the 5th Embodiment of this invention. FIG. 10: is the figure and sectional drawing seen from the sleeper tree of the 6th Embodiment of this invention. FIG. 11 is a perspective view of the rail fixing member of the present invention as viewed from above. FIG. 12 is a view of the rail fixing member of the present invention as viewed from the rail direction. FIG. 13: is the figure and sectional drawing seen from the pillow of the modification of the 6th Embodiment of this invention. 14 to 16 are schematic diagrams showing a method for laying sleepers. 17 to 19 are a front view and a plan view of a modified example of the rail fixing member of the present invention. FIG. 20 is a perspective view and a side view of a sleeper according to a seventh embodiment of the present invention. FIG. 21 is a perspective view and a side view of a sleeper according to an eighth embodiment of the present invention. FIG. 22 is a perspective view and a side view of a sleeper according to the ninth embodiment of the present invention. FIG. 23 is a perspective view and a side view of a sleeper according to the tenth embodiment of the present invention. FIG. 24 is a perspective view of the sleeper tree according to the eleventh embodiment of the present invention. FIG. 25 is a perspective view showing the container member of the present invention.

A sleeper 1 according to the first embodiment of the present invention is shown in FIG. 1 and is provided with a long portion 10 and a block portion 11.
The long portion 10 has a prismatic shape, and the long portion 10 extends in the entire length of the sleeper 1 with the long direction as a horizontal direction. When the sleeper 1 is used, the rail 80 on the upper surface as will be described later.
Concatenated with
The material of the long portion 10 is a resin material reinforced with long fibers in one direction. Specifically, foamable thermosetting polyurethane is used as the resin material, and the long fibers are glass fibers. Is used. The glass fiber is contained by 10 to 20% by volume.

The block portion 11 has a rectangular parallelepiped shape and is joined to the long portion 10. The position of the block portion 11 is below the long portion 10 and below the position of the rail 80 as shown in FIG.
The block portion 11 is a molded product molded from a resin material, and is molded using a recycled material or the like as a raw material. Examples of the recycled material include cutting powder such as abrasive powder and cutting powder generated during the production of the glass fiber reinforced urethane resin used for the long portion 10 and the like. Are mixed with a binder and compressed in a mold.
As an adhesive used as a binder, it is liquid in the state of the raw material and can be heat-cured, for example, thermosetting polyurethane, polyurea, phenol resin,
Urea resin, unsaturated polyester, etc. can be used.

The relationship between the tensile strength and the compressive strength between the long portion 10 and the block portion 11 is preferably as follows. That is, it is desirable that the long portion 10 is higher in the tensile strength than the block portion 11 and the compressive strength is higher in the block portion 11 than the long portion 10.
When the sleeper 1 is used, the block portion 11 is mainly subjected to compression and the long portion 10 is mainly subjected to tension and bending, so that a larger load can be received even with the same size.

Moreover, the relationship of the length of the elongate part 10 and the block part 11 can be performed as follows.
As shown in FIG. 1, the lengths of the long portion 10 are L1 in the longitudinal direction, b1 in the rail direction is b1, and the height is H1. In the following description, the length in the longitudinal direction is L2, the length in the rail direction is b2, and the height is H2.
The height H1 (vertical length) of the long portion 10 is desirably 30 mm or more, and the height H2 (vertical length) of the block portion 11 is desirably 70 mm or greater. The total thickness of 11 is desirably 100 mm or more.
By configuring in this way, the thickness of the rail 80 portion can be ensured, and the thickness of the portion other than the rail 80 can be reduced without deteriorating.

The width of the long portion 10 in the rail direction is preferably smaller than the width of the block portion in the rail direction. By being configured in this way, the block portion 11 having a large width comes into contact with the road bed, and the stress can be reduced by dispersing the load.

Further, as specific dimensions of the long portion 10 and the block portion 11, the following can be used.
In the first combination, L1 is 1500 mm, b1 is 180 mm, H1 is 30 mm, L2
Is 300 mm, b2 is 200 mm, and H2 is 100 mm.
In the second combination, L1 is 1800 mm, b1 is 200 mm, H1 is 50 mm, L2
Is 400 mm, b2 is 250 mm, and H2 is 70 mm.
In the third combination, L1 is 2100 mm, b1 is 230 mm, H1 is 70 mm, L2
Is 500 mm, b2 is 300 mm, and H2 is 50 mm.

The block portion 11 and the long portion 10 of the sleeper 1 may be joined in advance at a factory or the like, or may be performed when laying on a track. For this joining, an adhesive may be used, or a screw or the like may be used.
Furthermore, it is desirable that the block portion 11 and the long portion 10 are joined by a fastening member such as a screw or a dog nail that fixes a tie plate used when connecting the rail 80 and the long portion 10.

When the road bed used is a ballast road bed, load distribution can be performed efficiently by installing the sleeper 1 in a state as shown in FIG. That is, the lower surface side 10 a of the long portion 10 is aligned with the upper surface side of the ballast portion 81 so that the block portion 11 is buried in the ballast portion 81.
By arranging the sleeper 1 in this way, effective load distribution can be achieved.

Moreover, as shown in FIG. 4, a sleeper 1 a provided with a long plate 12 between the long portion 10 and the block portion 11 may be used. The long plate 12 has a wider vertical projection surface than the block portion 11, and the long plate 12 of the ballast portion 81 is buried at the time of installation. With this configuration, when a load is applied to the rail 80, the load can be further dispersed.

Next, sleepers 2, 3, 4, 5, and 6 in the second to sixth embodiments of the present invention will be described. The sleepers 2, 3, 4, 5, 6 use the filler 16, and are manufactured by filling the space 15 with the filler 16.

The sleeper tree 2 in the second embodiment is shown in FIG. The sleeper tree 2 has a container member 20 and a filler 16.
The container member 20 of the sleeper 2 is shown in FIG. The container member 20 is provided with three space portions 15 whose upper sides are open. The three space portions 15 are arranged in the longitudinal direction of the sleeper 2 and are located between the rails 80 and outside the rails 80 as shown in FIG. Therefore, the space portion 15 does not become a portion for fixing the rail 80, and the rail 80 is installed on the partition block 21 that is a portion between the space portions 15.

The container member 20 includes side plates 25, 25 on the longitudinal side and side plates 26, 2 on the end side in the longitudinal direction.
6, the bottom plate 23, and the block-shaped partition block portions 21, 21 are used to be manufactured. The material of the container member 20 is not particularly limited, but resin, wood, concrete material, and the like can be used. In particular, the long fiber reinforced foamed urethane resin is lightweight and strong, and thus is excellent.

The filler 16 is a material that can be changed from a fluid state to a solid state, and specifically, a reaction curable resin such as concrete, mortar, or two-component mixed type is used. Moreover, an additive can also be used in the range which does not lose fluidity | liquidity.

When the sleeper 2 is manufactured, the container member 20 is manufactured as described above, and the space 16 is filled with the filler 16. This filling may be performed before installation of the sleeper 2 or at the same time as installation.
When filling the sleeper tree 2 at the same time, the container member 20 can be positioned at the place where the sleeper tree 2 is installed and filled with the filler 16. In such a method, the container member 20
Since positioning can be performed only with this, it is possible to work in a light state and workability is good. Further, generally, after the sleeper 2 is installed, the sleeper 2 becomes heavier, so that the performance such as vibration transmission is excellent. Note that the sleepers 3, 4, 5, and 6 in the third to sixth embodiments have the same effects as the above effects.

Then, after filling the space portion 15 with the fluid filler 16, it is changed to a solid state to complete the sleeper.

The sleeper tree 3 in the third embodiment is shown in FIG. The sleeper 3 includes a container member 30, a filler 16, and a rail fixing portion 28.
The container member 30 is provided with five space portions 15, and, like the container member 20 of the second embodiment, three space portions located between the rails 80 and outside the rails 80. Two spaces 15 are provided in the vicinity of the space 15 and the rail 80, and are arranged in the longitudinal direction of the sleeper 3. Note that the container member 30 is made of concrete.

The rail fixing members 28 are inserted and fixed in the two space portions 15 in the vicinity of where the rails 80 are installed, and the other three space portions 15 are filled with the filler as in the second embodiment. 16 is filled.
A member having wear resistance or a member having elasticity may be provided between the rail fixing member 28 and the container member 30. In such a case, wear of the contact portion can be reduced, and vibration can be reduced.

The sleeper tree 4 in the fourth embodiment is shown in FIG. The sleeper 4 includes a container member 33, a filler 16, and a rail fixing portion 28. And the sleeper tree 4 of this embodiment differs in the space part 15 compared with the sleeper tree 3 of 3rd Embodiment, and the other structure is the same.
Specifically, the side plate 2 on the end side in the longitudinal direction provided in the container member 30 of the third embodiment.
6, the space 17 located outside the rail 80 has an opening on the end side in the longitudinal direction, and the space 16 in this portion is not filled with the filler 16.

When the sleeper tree 4 is installed on the ballast roadbed, the ballast enters the space 17 located outside the rail 80, so that the resistance of the sleeper tree 4 to the roadbed can be increased.

The sleeper tree 5 in the fifth embodiment is shown in FIG. The sleeper 5 has a container member 30 and a filler 16 similar to those of the third embodiment, and a rail fixing portion 35 different from that of the third embodiment. As shown in FIG. Fastening portion 36 on 35a
36 can be connected to the rail 80.

The concave portion 35 a of the rail fixing portion 35 is a groove that is inclined when viewed from above and has a parallelogram shape, and is provided with inclined portions 35 b and 35 b that are inclined with respect to the direction of the rail 80. And the fastening part 36 is inserted in the recessed part 35a.

The fastening portion 36 has a trapezoidal shape when viewed from above, and is in contact with the rail 80 and the inclined portion 35b. The portion of the fastening portion 36 that contacts the rail 80 has a protruding portion 36 whose upper side protrudes toward the rail.
a is provided. The fastening portions 36 and 36 are fixed to the rail fixing member 35 by fixing bolts 37 and 37.
And the protrusion part 36a of both sides can hold down the flange 80a of the lower side of the rail 80 from the top, and can fix the rail 80. FIG.
Furthermore, if the fastening part 36 is slid along the inclined part 35b, it can move in the longitudinal direction of the sleeper 5, so that the adjustment of the interval (gauge) between the rails 80 can be facilitated.

The sleeper tree 6 in the sixth embodiment is shown in FIG. The sleeper 6 is provided with a container member 40, a filler 16, a rail fixing portion 35, and a fastening portion 42.
The container member 40 is composed of side plates 25, 25 on the longitudinal side, side plates 26, 26 on the end side in the longitudinal direction, and a bottom plate 23, and forms a single space 15 as a whole.

The rail fixing portion 35 is the same as that of the fifth embodiment, and is provided with a concave portion 35a, and the concave portion 35a is provided with an inclined portion 35b. Moreover, the fastening part 42 is provided with a wedge part 44 and a pressing part 45 as shown in FIG.

The wedge portion 44 has a trapezoidal shape when viewed from above, and is in contact with the rail 80 and the inclined portion 35b. The portion of the wedge portion that contacts the rail 80 has a protruding portion 44 whose upper side protrudes toward the rail side.
a is provided. The holding portion 45 is located above the wedge portion 44 and has fixing bolts 37, 3
7, the wedge portion 44 is fixed to the rail fixing portion 35 while being pressed against the rail fixing portion 35.

In the present embodiment, an embedded plug 37 a for the fixing bolt 37 is provided in the rail fixing member 35. Specifically, the embedded plug 37 a has an internal thread shape that can be engaged with the fixing bolt 37 on the inner side and is open on the upper side, and the embedded plug 37 a is inserted into a hole provided in the rail fixing member 35.
Is inserted and fixed.
Furthermore, by providing the locking portion 47, the coupling between the rail fixing member 35 and the container member 40 can be strengthened. Specifically, the locking portion 47 projects laterally on the side surface of the rail fixing member 35. Specifically, a tapping screw is attached in a lateral direction.

And the protrusion part 44a of the wedge part 44 of both sides is the flange part 80a of the lower side of the rail 80.
From above, the rail 80 can be fixed.
Furthermore, in this embodiment, the rail fixing member 35 and the container member 40 are fixed by filling the container member 40 with the filler 16 and curing it.

When the sleeper 6 is already laid after the rail 80 has already been laid, the replacement work can be easily performed by using the following method.
First, the sleeper to be replaced is removed (FIG. 14), and the rail fixing member 35 is put into the container member 40 in a state where the rail fixing member 35 is attached to the rail 80 by the fastening portion 42 and the rail fixing member 35 is suspended ( FIG. 15). At this time, the container member 40 is set to the installation position. Then, the filler 16 is filled into the space 15 of the container member 40, and the sleeper 6 is manufactured (FIG. 16).

Moreover, the container member 40a of the sleeper 6a shown in FIG. 13 can be used. Unlike the container member 40 of the sleeper 6 in the sixth embodiment, the container member 40 a is not provided with one space portion 15 as a whole, but is provided with a plurality of space portions 15. Specifically, the container member 40a includes five space portions 1 like the container member 30 of the sleeper 3 of the third embodiment.
5 are arranged in the longitudinal direction of the sleeper 6a.

And the rail fixing member 35 is provided in the space part 15 of the two places in the vicinity which installs the rail 80, The filling material 16 is filled into the clearance gap between the space part 15 and the rail fixing member 35, and the container member 4 is provided.
0a and the rail fixing member 35 are fixed.
Therefore, the laying method of the sleeper tree 6 shown in FIGS.
It can be applied to a. Note that the space 15 into which the rail fixing member 35 is not inserted may or may not be filled with the filler 16, and can be selected according to the environment in which it is used.
Moreover, the latching | locking part 47a of the rail fixing member 35 of the sleeper 6a is a part which has the shape where the lower side vicinity of the side surface protruded from the other part.

The rail fixing member 35 in the present embodiment can also have a shape as shown in FIGS. 17 to 19, and the strength of the rail fixing member 35 and the container member 40 can be increased. The rail fixing member 49 shown in FIG. 17 has a trapezoidal shape that widens downward, and the rail fixing member 50 shown in FIG. 18 has a groove 50a on the side surface, and the rail shown in FIG. The fixing member 51 has a recess 51a on the side surface.
When the filler 16 is cured, the rail fixing member 49 has a narrow upper side of the filler 16 and the rail fixing members 50 and 51 have the filler 16 intrude into the grooves 50a and the recesses 51a. , 51 has a high separation strength.

Further, a wear preventing member or an elastic member can be provided on the surfaces of the rail fixing members 28, 35, 49, 50, 51. The wear preventing member and the elastic member are container members 30, 33, 40, 40a.
It can be provided in between. Further, the container members 30, 33, 40, 40a are shown in FIG.
As shown in FIG. 4, the container member 34 may be foldable, and the volume of the space portion 15 is reduced when folded.

Next, sleepers 7, 8, 9, 90, 91 in the seventh to eleventh embodiments of the present invention will be described. The sleepers 7, 8, 9, 90, 91 are obtained by using the super stretched sheet 82.

The sleeper tree 7 in the seventh embodiment is as shown in FIG. 20, and a super-stretched sheet 82 serving as a reinforcing layer is provided on the surface of the prismatic main body 83. The material of the main body 83 is a long fiber reinforced foamed urethane resin molded product, but is not particularly limited, and is a recycled product molded using a waste material of a long fiber reinforced foamed urethane resin molded product, Resin using waste resin can be used.
Furthermore, as this recycled product, a product obtained by crushing a long fiber reinforced foamed urethane resin molded product from several mm to several tens of mm, adding a binder and heating and compressing it can be used.

The super-stretched sheet 82 is a sheet in which a polyethylene resin is stretched at the time of molding so that the orientation direction of the resin molecules becomes a substantially constant direction. And the tensile strength is particularly large with respect to the orientation direction of the molecules as compared with a normal sheet. The type of polyethylene may be either low-density polyethylene or high-density polyethylene, and materials other than polyethylene, such as polypropylene, can also be used.

The sleeper tree 7 is provided on the surface such that the orientation direction of the molecules of the super-stretched sheet 82 is the longitudinal direction of the main body 83. Specifically, the super stretched sheet 82 is provided on the upper surface, the lower surface, and the long side surface of the sleeper 7.
When the sleeper 7 is laid and used, a force may be applied in the direction in which the longitudinal axis bends. In such a case, the side that is the outer side of the bend extends, so that a tensile force is applied. In this embodiment, the molecular orientation direction of the super-stretched sheet 82 is provided so as to be the longitudinal direction of the main body portion 83. Therefore, the strength increases with respect to the direction extending in the longitudinal direction.

Also, for sleepers 8, 9, and 90 in the eighth to tenth embodiments of the present invention, the orientation direction of the molecules of the super-stretched sheet 82 is the longitudinal direction of the main body portions 83a, 83b, and 83c. The super-stretched sheet 82 is used as a reinforcing layer.

A sleeper 8 according to an eighth embodiment of the present invention is shown in FIG. 21, in which a main body portion 83 a is obtained by laminating plate-shaped molded products of long fiber reinforced foamed urethane resin in the vertical direction.
2 is provided in the same manner as the sleeper 7 in the seventh embodiment. Since it is comprised in this way, the main-body part 83 can be manufactured using a molded product with thin thickness.

A sleeper 9 according to a ninth embodiment of the present invention is shown in FIG. The main body 83
“b” is obtained by combining a plurality of plate-like molded products of long fiber reinforced foamed urethane resin into a parquet and laminating them vertically. The mating portions are made different between adjacent upper and lower layers. Since it is configured in this way, the main body portion 83b of one sleeper 9 can be manufactured using only a half-sized dimension or a normal part of a molded product after use.
The super-stretched sheet 82 is provided on the surface such that the molecular orientation direction is the longitudinal direction of the main body portion 83 b, and is provided on the upper and lower surfaces of the sleeper 9.

A sleeper 90 according to the tenth embodiment of the present invention is shown in FIG. 23, and the main body 83c is made of a long fiber reinforced foamed urethane resin molded product. And the super stretched sheet 82
Is manufactured by being attached to the upper and lower surfaces of the sleeper 90 when the main body 83c is molded. Therefore, the forming process of the main body portion 83c and the process of attaching the super stretched sheet 82 can be performed in one line.

Body parts 83, 8 of sleepers 7, 8, 9, 90 in the seventh to tenth embodiments of the present invention
3a, 83b, 83c and the super stretched sheet 82 are joined. Specifically, the bonding method is not limited, but the bonding can be performed by applying an adhesive such as a hot melt adhesive.
Moreover, there may be two or more reinforcing layers, and the super-stretched sheets of each layer may be laminated with the stretching directions orthogonal to each other.

Moreover, the sleeper tree 91 shown in FIG. 24 is manufactured so as to form a prismatic shape by stacking super-stretched sheets 82 in the vertical direction. Then, the orientation direction of the molecules of the super stretched sheet 82 is set to be the longitudinal direction. Further, each layer is bonded using an adhesive.

Since the sleeper tree 91 is configured as described above, the orientation direction of the molecules of the super-stretched sheet 82 is the longitudinal direction of the entire sleeper tree 91, and the tensile strength in the longitudinal direction is increased.
Therefore, when the sleeper tree 91 is laid and used, the strength increases when a force is applied in the direction in which the longitudinal axis bends.

Moreover, a wear preventing member or an elastic member can be provided on the surface of the sleepers 1, 2, 3, 4, 5, 6, 7, 8, 9, 90, 91. Further, the wear and vibration of the surface can be reduced by the wear preventing member and the elastic member.

Next, a molded product using a glass urethane powder that can be used for the rail fixing member, the container member, and the like of the above-described embodiment and that can be obtained by cutting glass fiber reinforced urethane resin will be described.

The cutting powder generated during the production of the glass fiber reinforced rigid urethane foam is a glass urethane powder mainly composed of short glass fibers and a thermosetting urethane foam resin. Urethane resin cannot be recycled as a raw material by re-melting its molecular structure, and it is impossible to recover only glass fibers. For this reason, most of the fuel is thermally recycled as fuel, but the processing cost is incurred at that time, and establishment of a material recycling technology that can reduce the processing cost is desired.
Therefore, if a high-strength molded product can be provided using this as a raw material, it can be provided at low cost and is good for the environment.

However, when cutting powder is used more actively as a raw material, it is possible to provide a low-cost material.For example, a compact that is hot-pressed with cutting powder and a binder has high compressive strength, but bending It is necessary to obtain a high bending strength in order to develop various members with low strength.

Therefore, the composition of the molded product of the present invention was as follows.
First, the magnitude | size of the glass urethane powder to be used is the range of 1-2000 micrometers. If it is this range, the finish of a molded product will be good and the cutting powder generated at the time of grinding | polishing with much generation amount of cutting powder (about 90% of total generation amount) can be used as it is. The size of the glass urethane powder is specified by the median diameter of the particle size distribution using a laser diffraction method.

Further, a fiber material having an aspect ratio of 50 or more is added. The reinforcing effect is known to decrease in strength when the fiber length is shortened. In general, the ratio of the fiber length l to the diameter d and the aspect ratio (l / d) of at least 50 or more are practical. It is said that it is necessary. Therefore, if the aspect ratio is 50 or more, a fiber bundle or a sheet shape may be used in addition to the fiber.

The kind and addition amount of the fiber material is preferably such that the product of the volume fraction (Vf) of the reinforcing fiber and the tensile strength (σf) of the reinforcing fiber is 15 kgf / mm ² or more. The product of the volume ratio (Vf) and the tensile elastic modulus (Ef) of the reinforcing fiber is preferably 600 kgf / mm ² or more.

The tensile strength and tensile elastic modulus per unit specific gravity of the fiber are referred to as specific strength and specific elastic modulus, respectively.
Glass fiber specific gravity 2.5 Vf = 100 kgf / mm ² , Ef = 4000 kgf / mm ² , specific strength = 4 ×
10 ⁶ (cm), specific elastic modulus = 160 × 10 ⁶ (cm)
Carbon fiber specific gravity 1.77, Vf = 250 kg / mm ² , Ef = 26000 kg / mm ² , specific strength = 1
4 × 10 ⁶ (cm), specific modulus = 1470 × 10 ⁶ (cm)
・ Aramid fiber specific gravity 1.45, Vf = 280 kg / mm ² , Ef = 13300 kgf / mm ² , specific strength =
19 × 10 ⁶ (cm), specific modulus = 910 × 10 ⁶ (cm)
Polyethylene rolled sheet specific gravity 0.97, Vf = 80 kgf / mm ² , Ef = 2500 kgf / mm ² , specific strength = 8
× 10 ⁶ (cm), specific elastic modulus = 258 × 10 ⁶ (cm)
Polypropylene stretched sheet specific gravity 0.64, Vf = 50 kgf / mm ² , Ef = 1250 kgf / mm ² , specific strength = 8
× 10 ⁶ (cm), specific elastic modulus = 195 × 10 ⁶ (cm)
Iron wire specific gravity 7.75, Vf = 420 kgf / mm ² , Ef = 20400 kgf / mm ² , specific strength = 6 × 10 ⁶ (cm), specific elastic modulus = 263 × 10 ⁶ (cm)

For example, if the volume ratio in the cutting chips molded article was added carbon fibers so as to 6vol%, Vf · σf = 15kgf / mm 2 is obtained, Vf · Ef = 1560kgf / mm 2 is waiting. Therefore, this effect is considered to increase the strength of the matrix, and a high-strength molded product can be obtained. Moreover, an inexpensive high-strength molded product can be obtained by using a material obtained by recycling these materials.

The bending strength of the sample obtained by curing the matrix cutting powder and urethane resin using a hot press at a specific gravity of 1.35 is 5.6 kgf / mm ² , and the flexural modulus is 490 kgf / m.
m ² . Therefore, specific strength = 0.4 × 10 ⁶ (cm), specific modulus = 36 × 10 ⁶ (cm
)

The method of mixing the cutting powder, the fibrous raw material, and the binder raw material is not particularly limited, but a mixing method in which the binder raw material is uniformly coated on the cutting powder and the fibrous raw material surface and the shape of the fibrous raw material does not change during mixing is preferable. . The mold is not particularly limited, but in the case of hot pressing, since the reaction efficiency is further improved when heat is transmitted from the entire surface, a mold that can be heated from the top, bottom, left and right is preferable. A method for orienting the mixed raw material is not particularly limited, and a method of vibrating a jig having a slit in a direction to be oriented is used. Although a press machine is not specifically limited, In general, since the reaction rate increases as the temperature increases, a hot press capable of heating the mixed raw material during pressing is preferable. For example, a press machine equipped with facilities such as steam, heat transfer oil, electric heat, electromagnetic induction and the like is preferable.

From the viewpoint of recycling and cost reduction of molded products, it is preferable to use 50 wt% or more of cutting powder. As a binder, what is necessary is just to adhere | attach glass urethane powders and make the whole into a fixed shape. Specifically, inorganic components such as gypsum, PE, PPABS, PS
Resin components such as thermoplastic resins such as PMMA, PC, and PET, thermosetting resins such as phenol, urea, melamine, unsaturated polyester, epoxy, urethane, acrylic, and isocyanate can be used.
When a thermosetting resin is used as the binder, the surface of the cutting powder can be coated with a small amount of addition by mixing the main agent, curing agent and cutting powder. By doing so, a high-strength molded product can be obtained.
Therefore, a thermosetting resin is particularly preferable as the binder from the viewpoint of recycling and low cost. In particular, from the viewpoint of compatibility with cutting powder and adhesiveness, the binder is particularly preferably a urethane resin composed of a polyisocyanate compound and a polyol.

The above materials are mixed and hot pressed. The conditions for hot pressing vary depending on the required physical properties of the cut powder molded product, but at 50 ° C. or lower, the conditions are extremely slow, which is not preferable from the viewpoint of production efficiency. Moreover, when it is 180 degreeC or more, the urethane resin in cutting powder carbonizes, and it is unpreferable on the appearance of a product. Therefore, the press temperature is particularly preferably 50 to 180 ° C. When a urethane resin is selected, the press temperature is preferably 110 ° C. from the viewpoint of production efficiency.

Next, what can be implemented at low cost by improving the bending properties of the fiber reinforced rigid urethane foam will be described.

Glass fiber reinforced rigid urethane foam uses many long glass fibers to improve the bending properties. Although the volume ratio varies depending on the specific gravity of the foam, it is 6 vol% at 40 wt% when the specific gravity is 0.4, and 15 vol% at 50 wt% when the specific weight is 0.74. A large amount of glass fiber is required to obtain high bending properties, which increases the price.
Then, paying attention to the factor which controls a bending physical property, the cheap fiber reinforced rigid urethane foam is provided by improving this.

The kind and addition amount of the fiber material is preferably such that the product (Vf · σf) of the volume fraction (Vf) of the reinforcing fiber and the tensile strength (σf) of the reinforcing fiber is 15 kgf / mm ² or more. The product of the volume fraction (Vf) of the reinforcing fiber and the tensile elastic modulus (Ef) of the reinforcing fiber is 600 kgf /
/ Mm ² or more is preferable.
In addition, the reinforcing effect is known to decrease in strength when the fiber length is shortened,
It is said that the ratio of the fiber length l to the diameter d and the aspect ratio (l / d) of 50 or more are practically necessary. Therefore, if the aspect ratio is 50 or more, a fiber bundle or a sheet shape may be used in addition to the fiber.

The glass fiber used for the glass fiber reinforced rigid urethane foam is SiO ₂ : 50-6.
_{0wt%, Al 2 O 3:} 10~20wt%, CaO: the 16～25Wt% as a main component,
Tensile strength σf: 100 kgf / mm ² , tensile elastic modulus Ef: 4000 kgf / mm ² ,
It is a continuous long fiber having a specific gravity of 2.5.
When the specific gravity of the glass fiber reinforced rigid urethane foam is 0.74, Vfσf is 15 kgf /
mm ² and Vf · Ef are 600 kgf / mm ² . Therefore, in order to obtain a strength property higher than that of the glass fiber reinforced hard urethane foam, the reinforcing fiber may not be a glass fiber as long as a numerical value higher than this can be achieved.
The tensile strength and tensile elastic modulus per unit specific gravity are referred to as specific strength and specific elastic modulus, respectively. In the case of glass fiber, specific strength = 4 × 10 ⁶ (cm) and specific modulus = 160 × 10 ⁶ (cm).

When a material larger than this value is used, when the same weight is added, the volume ratio of the reinforcing fiber is increased, so that the strength properties are greatly increased. In other words, it means that it is possible to greatly reduce the amount of material necessary to obtain the same strength physical properties as the glass fiber reinforced rigid urethane foam. In particular, the material having a specific strength and a specific elastic modulus larger than those of the glass fiber is as described above.

For example, when carbon fiber is used instead of glass fiber, Vf · σf =
In order to obtain 15 kgf / mm ² , Vf should be 6 vol%, and the addition ratio can be greatly reduced compared to glass fiber, and the cost can be reduced.
Costs can be further reduced by using recycled materials.

  First, examples and comparative examples of molded products using glass urethane powder will be described.

(Comparative Example 1)
597 g of polyisocyanate is weighed with respect to 408 g of polyol, and 50 with a table stirrer.
The liquid raw material was prepared by mixing at 00 rpm for 60 s. Next, 4000 g of cutting powder having a median diameter of 75 μm is weighed and put into a 20 L mixer (manufactured by Mitsui Mining Co., Ltd.), and the linear velocity is 10 m / s.
Was stirred at. The liquid raw material was charged into the mixer, stirred for 90 seconds, and then discharged. After 5000 g of this mixed raw material was weighed and uniformly developed into a 300 × 500 mm mold, it was pressed using a press at a pressure of 90 kg / cm ² , a temperature of 110 ° C., and a time of 30 minutes, and the thickness (t)
A resin molded body of 25 × width (w) 800 × length (l) 500 was obtained. According to JIS Z2101, the sample was cut into a predetermined size, and the density, bending strength, and compressive strength were measured.

(Example 1)
In Comparative Example 1, specific gravity 1.77, Vf = 250 kgf / mm ² , Ef = 2600 kgf / mm ² , specific strength = 1 cut into 3500 g of cutting powder and 100 mm in length instead of cutting powder
A mixture of 500 g of carbon fiber of 4 × 10 ⁶ (cm) and specific modulus = 1470 × 10 ⁶ (cm) was used. Other contents are the same as those in Comparative Example 1.

As a result, the density (g / cm ³ ) was 1.35 in Comparative Example 1 and 1.85 in Comparative Example 1. The bending strength (MPa) was 55 in Comparative Example 1 and 140 in Example 1. The flexural modulus (MPa) of Comparative Example 1 was 4800, while Example 1 was 9000.
In addition, the amount of reinforcing fiber of Example 1 is 10 wt%, and is 7.5 vol%.

Next, examples of what can be implemented at low cost by using other fibers in place of glass fibers to improve the bending physical properties will be described.

(Comparative Example 2)
Specific gravity 2.5 as glass fiber, tensile strength σf: 100 kgf / mm ² , tensile elastic modulus Ef: 4000 kgf / mm ² , specific strength = 4 × 10 ⁶ (cm), specific elastic modulus = 160 × 10
⁶ (cm) continuous long fibers were used. This fiber is impregnated with urethane fiber, 1 vol% of glass fiber 60wt%, urethane resin 5 in the glass fiber reinforced rigid urethane foam production line
It adjusted so that it might become 0.74 specific gravity of 0 vol% of 85 vol%. After that, the sample was JIS Z
According to 2101, bending strength and bending elastic modulus were measured.

(Example 2)
Instead of the glass fiber of Comparative Example 1, the specific gravity is 1.77, Vf = 250 kgf / mm ² , Ef =
26000 kgf / mm ² , specific strength = 14 × 10 ⁶ (cm), specific modulus = 1470 × 10
⁶ (cm) long carbon fibers were used. This fiber was impregnated with urethane resin, and adjusted to have a specific gravity of 0.52 of 6 vol% of carbon fiber 20 wt% and 94 vol% of urethane resin 80 wt% in a glass fiber reinforced rigid urethane foam production line. Then the sample was JIS
The bending strength and bending elastic modulus were measured according to Z2101.

As a result, the density (g / cm ³ ) was 0.74 in Comparative Example 2 and 0.52 in Example 2. The bending strength (MPa) was 140 in Comparative Example 2 and 142 in Example 2.
The flexural modulus (MPa) of Comparative Example 2 was 8500, whereas Example 2 was 22100.
In addition, the amount of reinforcing fibers in Comparative Example 2 is 50 wt%, which is 15 vol%. The amount of reinforcing fiber in Example 1 is 20 wt%, and is 6 vol%.

  The sleeper of the present invention can be reduced in weight and can be manufactured at a lower cost.

It is a perspective view of the sleeper tree of the 1st embodiment of the present invention. It is a top view of the sleeper tree of the 1st Embodiment of this invention. It is the figure seen from the rail direction in the state which installed the sleeper of the 1st Embodiment of this invention. It is the figure seen from the rail direction in the state which installed the sleeper of the modification of the 1st Embodiment of this invention. It is a perspective view of the container member of the 2nd Embodiment of this invention. It is the front view and BB sectional drawing of the sleeper tree of the 2nd Embodiment of this invention. It is the figure and sectional drawing seen from the sleeper tree of the 3rd Embodiment of this invention. It is sectional drawing of the sleeper tree of the 4th Embodiment of this invention. It is the figure and sectional view seen from the sleeper tree of the 5th Embodiment of this invention. It is the figure and sectional drawing seen from the sleeper tree of the 6th Embodiment of this invention. It is the perspective view which looked at the rail fixing member of the present invention from the top. It is the figure which looked at the rail fixing member of the present invention from the rail direction. It is the figure and sectional drawing seen from the sleeper of the modification of the 6th Embodiment of this invention. It is the schematic diagram which showed the method of laying a sleeper tree. It is the schematic diagram which showed the method of laying a sleeper tree. It is the schematic diagram which showed the method of laying a sleeper tree. It is a figure of the modification of the rail fixing member of this invention, (a) is a perspective view, (b) is a front view, (c) is a top view. It is a figure of the modification of the rail fixing member of this invention, (a) is a perspective view, (b) is a front view, (c) is a top view. It is a figure of the modification of the rail fixing member of this invention, (a) is a perspective view, (b) is a front view, (c) is a top view. It is the perspective view and side view of the sleeper tree of the 7th Embodiment of this invention. It is the perspective view and side view of the sleeper tree of the 8th Embodiment of this invention. It is the perspective view and side view of the sleeper tree of the 9th Embodiment of this invention. It is the perspective view and side view of the sleeper tree of the 10th Embodiment of this invention. It is a perspective view of the sleeper tree of the 11th embodiment of the present invention. It is the perspective view which showed the container member of this invention.

Explanation of symbols

1,1a, 2,3,4,5,6,7,8,9,90,91 sleeper 10 long part 11 block part 15 space part 16 filler 28, 35, 49, 50, 51 rail fixing member 30 , 33, 34, 40, 40a Container member 47 Locking portion 80 Rail 82 Super stretched sheet

Claims (40)

A sleeper installed on the lower side of the long rail and having a long part extending over the entire length of the sleeper and a block connected to the long part. The sleeper is characterized in that the part is provided at a position to support the load from the rail. The sleeper according to claim 1, wherein the long part has a columnar shape, and the block part is located below the long part. The longitudinal direction is set substantially perpendicular to the rail direction, and the width of the long portion in the rail direction is smaller than the width of the block portion in the rail direction.
Sleeper tree as described in. The sleeper tree according to any one of claims 1 to 3, wherein the long portion has a higher tensile strength than the block portion. The block member has higher compressive strength than the long portion.
A sleeper as described in any of the above. The sleeper according to any one of claims 1 to 5, wherein the long part is a long fiber reinforced urethane resin, and the direction of the fiber is a longitudinal direction of the sleeper. A sleeper having a container member having a space inside and a filler located in the space, the filler being a material that can be changed from a fluid state to a solid state, and flowing into the space portion. A sleeper characterized in that it can be produced by being changed into a solid after being filled with the filler. The sleeper according to claim 7, wherein the space is positioned between two rails when the sleeper is installed. It has a rail fixing member which can be connected with a rail located in the lower side of a rail, and arranges the rail fixing member and a filler in the same space part. Pillows. A concave portion is provided on the upper side of the rail fixing member, and a side surface of the concave portion has an inclined portion that is inclined with respect to the rail direction, and a fastening portion that fastens the rail and the rail fixing member is in contact with the inclined portion. The sleeper according to claim 9, wherein the sleeper can be fastened in a state. A fixing bolt and an embedded plug, wherein at least one of the embedded plugs is open, and a hole that can be engaged with the fixing bolt is provided; the embedded plug is inserted into a hole provided in a rail fixing member; The sleeper according to claim 10, wherein the fastening portion is fastened by engagement between a fixing bolt and an embedded plug. The rail fixing member is provided with a convex or concave engaging portion, and the rail fixing member is disposed until the filler in the space portion changes to a solid state, and the rail fixing member and the filler are formed by the engaging portion. The sleeper according to claim 9, wherein the sleeper can be locked. The sleeper tree according to any one of claims 7 to 12, wherein the density of the filler is larger than the density of the container member.   The pillow according to any one of claims 7 to 13, wherein the container member is foldable. A sleeper comprising a main body and a reinforcing layer, wherein the main body is elongated, and the reinforcing layer has a super-stretch sheet attached to the surface of the main body. The sleeper according to claim 15, wherein the stretching direction of the super-stretched sheet of the reinforcing layer is oriented in the longitudinal direction of the main body. The sleeper according to claim 15 or 16, wherein the main body portion is formed by laminating in a vertical direction. The sleeper according to claim 17, wherein each of the layers stacked in the vertical direction is a combination of a plurality of members. The sleeper tree according to any one of claims 15 to 18, wherein the reinforcing layer includes two or more layers, and the super-stretched sheets of each layer are laminated so that the stretching directions are orthogonal to each other. The sleeper tree according to any one of claims 15 to 19, wherein the material of the ultra-stretched sheet is low-density polyethylene, high-density polyethylene, or polypropylene. The sleeper manufacturing method according to any one of claims 15 to 20, wherein the step of forming the main body and the step of aligning the reinforcing layer with the main body are performed in the same line. The sleeper according to claim 21, wherein a hot melt adhesive is attached to a side of the reinforcing layer to be bonded to the main body, and a heating step is provided after the reinforcing layer is aligned with the main body. Production method. A sleeper characterized by laminating super-stretched sheets made of polyethylene in the vertical direction and the stretching direction being the longitudinal direction. A molded product comprising a glass urethane powder having a diameter of 1 to 2000 μm formed by cutting a glass fiber reinforced urethane resin, a fiber material having an aspect ratio of 50 or more, and a binder material, which are compressed and molded. The fiber material has a specific strength of 0.4 × 10 ⁶ cm or more and a specific modulus of 36 × 10 ⁶ c.
The molded article according to claim 24, wherein the molded article is m or more. 25. The fiber material is glass fiber, carbon fiber, aramid fiber, polyethylene stretched sheet, polypropylene stretched sheet, or iron wire.
5. The molded product according to 5. The molded article according to any one of claims 24 to 26, wherein the fibrous material reuses the fibrous material used as a part of the molded article. The molded article according to any one of claims 24 to 27, wherein the binder material becomes a thermosetting resin after molding. The molded article according to claim 28, wherein the thermosetting resin is a urethane resin. A molded article that is a foam of a hard urethane resin having a reinforcing material, wherein the reinforcing material is a material other than glass fiber, and the shape of the reinforcing material is a fiber shape having an aspect ratio of 50 or more, a fiber bundle shape, and A molded product characterized by being in a sheet form and having a product Vf · σf of a volume fraction Vf of the reinforcing material and a tensile strength σf of the reinforcing material of 15 kgf / mm ² or more. The molded article according to claim 30, wherein the specific strength of the reinforcing material is 4 x 10 ⁶ cm or more. A molded article that is a foam of a hard urethane resin having a reinforcing material, wherein the reinforcing material is a material other than glass fiber, and the shape of the reinforcing material is a fiber shape having an aspect ratio of 50 or more, a fiber bundle shape, and A molded product characterized in that it is in the form of a sheet, and the product Vf · Ef of the volume fraction Vf of the reinforcing material and the tensile elastic modulus Ef of the reinforcing material is 600 kgf / mm ² or more. The molded article according to claim 32, wherein the reinforcing material has a specific elastic modulus of 160 × 10 ⁶ cm or more. The molded article according to any one of claims 30 to 33, wherein the reinforcing material comprises carbon fiber, aramid fiber, polyethylene stretched sheet, polypropylene stretched sheet, and iron wire. The molded article according to any one of claims 30 to 34, wherein the reinforcing material reuses the fiber material used as a part of the molded article. The sleeper according to any one of claims 24 to 35, wherein the molded product is a sleeper. . A sleeper which is long and is installed on the lower side of the rail so that the longitudinal direction thereof is substantially perpendicular to the rail direction, a long part extending over the entire length of the sleeper and a block connected to the long part A sleeper characterized in that the block part is provided at a position to support a load from the rail, and the block member uses the molded product according to any one of claims 24 to 35. A sleeper having a container member having a space portion therein, a filler located in the space portion, and a rail fixing member located below the rail and connectable to the rail, wherein the filler is It is a material that can be changed from a fluid state to a solid state, and can be manufactured by changing the space portion to a solid state after filling the space portion with a fluid filler, and the rail fixing member is further defined in claim 24. A sleeper characterized by using the molded product according to any one of -35. Install the rail in advance, fix the rail fixing member to the rail, place the container member under the rail so that the rail fixing member is arranged in the space, and then fill the space with filler The rail fixing member and the container member are joined together.
A method of laying a sleeper tree as described in any of the above. A sleeper laying method having a rail fixing member and a container member, wherein the rail is previously installed, the rail fixing member is fixed to the rail, and the container member is arranged so that the rail fixing member is disposed in the space portion. A sleeper laying method comprising placing the rail fixing member and the container member on the lower side of the rail, and thereafter joining the rail fixing member and the container member.

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