JP6706987B2 - Shape memory alloy rail joint heating device and heating method - Google Patents

Description

The present invention relates to a heating device and a heating method for a shape memory alloy rail joint member.

A rail used as a guideway for traveling a vehicle or an overhead crane may form a guideway by connecting a plurality of rails.

On the other hand, in this structure, if there is a gap between the joints of the adjacent rails, when the vehicle or overhead crane passes by, the wheels fall into the joints, causing an impact, resulting in a track deviation at the joints and rail ends. There is a risk of damage to parts and damage to the vehicle and overhead crane itself.

Therefore, a shape memory alloy rail seam member may be used as a rail seam member that eliminates a gap in the seam portion of the rail and that allows easy rail replacement (Patent Documents 1 to 3).

The shape-memory alloy rail seam member has the characteristic of returning to its original shape by a shape restoring force by being heated to a required temperature after being processed at a certain critical temperature or lower.
Therefore, the shape-memory alloy rail joint member is attached to the connecting portion of the two rails in a state of being tensilely deformed, and then the shape-memory alloy rail joint member is heated by a burner to restore the rails, thereby bringing the rails into close contact with each other. be able to.
As a result, the compressive force can always be applied between the rails, so that even if the vehicle or the overhead crane passes through the joint, the joint does not open and the wheels do not fall into the joint.
As described above, the structures described in Patent Documents 1 to 3 are useful inventions in that the gap can be eliminated at the seam of the rail.

JP 2005-307530 A JP 2006-257707 A JP, 2008-266901, A

On the other hand, when heating the shape memory alloy rail seam member with a burner, fire is used, so if there are combustibles such as electric wiring and gas piping in the surroundings, fire curing is essential and construction restrictions will occur. There are cases.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a heating device and a heating method for a shape memory alloy rail joint member in which construction restrictions are less likely to occur than in the past.

A heating device for a shape-memory alloy rail seam member according to the present invention is provided on each of the web side surfaces of the rails, and a pair of shape-memory alloy rails that bring the rails arranged along the traveling direction into close contact with each other by a shape restoring force. A heating device for a shape-memory alloy rail-seam member that heats a seam member, which is provided so as to sandwich the outside of the pair of shape-memory alloy rail-seam members. It is characterized by comprising a pair of heating bodies for heating, and a pressing portion for pressing the heating surfaces of the pair of heating bodies against the outer surfaces of the pair of shape-memory alloy rail joint members to bring them into close contact.

According to this invention, since the heating device includes the heating body that heats the shape-memory alloy rail seam member by non-thermal power, and the pressing unit that presses the heating body to make the shape-memory alloy rail seam member come into close contact with the heating body, Even if there are flammable materials such as electric wiring and gas pipes in the surroundings, fire curing is not essential and construction restrictions are unlikely to occur.

In the present invention, it is conceivable that the heating body includes a heating plate that is in close contact with the outer surface of the shape memory alloy rail joint member, and a plurality of electric heaters that are inserted inside the heating plate.
According to the present invention, the heating body can be heated by non-fire power only by energizing the electric heater, so that the heating body can have a low cost and a simple structure.

In the present invention, a hole penetrating the web is formed at an end portion of the rail, and the shape memory alloy rail joint member is provided at a position corresponding to the hole of the rail in a direction in which a shape restoring force acts. A long hole may be formed along the through hole, and a through hole orthogonal to the heating surface may be formed in the heating body at a position corresponding to the hole of the rail. In this case, the pressing portion may be a hole of the rail. A slot of the shape memory alloy rail joint member, and a screw shaft portion inserted into each through hole of the pair of heating bodies, a pair of nuts screwed to both ends of the screw shaft portion, It is conceivable that it is provided between the heating body and the nut, and includes a biasing member that biases the heating body from the out-of-plane direction.

According to the present invention, since the pressing force by the pressing portion can be changed simply by rotating the nut and changing the position of the nut, the pressing portion can have a low cost and a simple structure, and workability at the time of heating is also improved. Be done.

In the present invention, a pair of bridging portions bridging the flanges of the rails, a pair of extending portions extending downward from the pair of bridging portions, and a pair of the extending portions, A structure in which a fixing jig having a pair of connecting portions facing the side surface of the web is provided and the pressing portion is fixed to the connecting portion is also conceivable.

According to the present invention, since the pressing portion is fixed to the fixing jig, the pressing portion can be positioned only by holding the fixing jig on the rail. Therefore, it is easy to assemble the pressing portion to the shape memory alloy rail joint member, and the workability is excellent.

In the present invention, a erection member is erected along the extension direction of the rail in the pair of spanning portions, and a plurality of suspension bolts are provided on the erection member along the extension direction of the rail. The heating element may be fixed to the suspension bolt.

According to the present invention, not only the pressing portion but also the heating body is fixed to the fixing jig, so that the pressing portion and the heating body can be positioned at the same time only by holding the fixing jig on the rail. Therefore, it is easy to assemble the pressing portion and the heating body to the shape memory alloy rail joint member, and the workability is excellent.

In the present invention, a heat insulating material may be provided outside the heating body.
According to the present invention, heat radiation from the outside of the heating element is suppressed, so that the efficiency of heat transfer can be improved and the cost required for heating can be reduced.
In this case, it is desirable that at least the surface of the heat insulating material that comes into contact with the heating body be made of a material having a smaller heat transfer coefficient than that of the heating plate.
According to the present invention, heat radiation from the outside of the heating element is further suppressed, so that the efficiency of heat transfer can be further improved and the cost required for heating can be further reduced.

In the present invention, a plurality of sets of the heating element and the heat insulating material can be provided in a range to which the shape restoring force of the shape memory alloy rail joint member is applied.

According to the present invention, when the shape-memory alloy rail joint member is deformed during heating, the heating body and the heat insulating material can easily follow the deformation, so that the heating body and the heat insulating material are prevented from cracking during heating. Therefore, the durability of the heating device can be improved.

A method of heating a shape-memory alloy rail seam member according to the present invention is provided on each of the web side surfaces of the rail, and is made of a pair of shape-memory alloys that bring the rails arranged along the traveling direction into close contact with each other by a shape restoring force. A method for heating a rail joint member made of a shape memory alloy for heating a rail joint member, wherein a range in which a shape restoring force of the pair of shape memory alloy made rail joint members acts is sandwiched by a pair of heating bodies from the outside. , A step of pressing the heating surfaces of the pair of heating bodies to the outer surfaces of the pair of shape memory alloy rail joint members to bring them into close contact with each other, and the pair of shape memory alloy rail joint members with the pair of heating bodies. A method for heating a rail joint member made of a shape memory alloy, which comprises performing a step of heating and a step of stopping heating by the pair of heating bodies when a heating time measured in advance has elapsed.

According to this invention, the range in which the shape restoring force of the shape-memory alloy rail joint member acts is heated by non-fire power in the state where the heating element is in close contact, so that flammable materials such as electric wiring and gas pipes are surrounded. Even if it exists, fire curing is not essential and construction restrictions are unlikely to occur.

The side view of the rail connection structure concerning a 1st embodiment of the present invention. The AA sectional view of FIG. 1 in the said embodiment. The disassembled perspective view of the heating device in the said embodiment. The perspective view of the heating device in the said embodiment. The top view of the heating device in the said embodiment. The side view of the heating device in the said embodiment. The heating device front view in the said embodiment. The enlarged perspective view of the heating plate and heat insulating material of the heating device in the said embodiment. Sectional drawing of FIG. 8 in the said embodiment. The perspective view which shows the inside of the electric heater in the said embodiment. The perspective view of the heating device which concerns on the 2nd Embodiment of this invention. The perspective view of the heating device which concerns on the 3rd Embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
A Cartesian coordinate system is described in each drawing referred to in the following description, and the extending direction of the rails 1A and 1B is the X direction, the width direction is the Y direction, and the height direction is the Z direction.

First, the structure of a rail connection structure 200 which is a heating target of the heating device 100 of the present invention will be described with reference to FIGS. 1 to 3.

As shown in FIGS. 1 to 3, the rail connection structure 200 includes a rail 1A, 1B and a pair of shape memory alloy rail joint members 3A, 3B provided on each of the web side surfaces 2A, 2B of the rails 1A, 1B. It has bolts 21 and 25 and nuts 23 and 27 for fixing the shape memory alloy rail joint members 3A and 3B to the rails 1A and 1B.

The rails 1A and 1B are arranged along the traveling direction, and have a web 2C and flanges 8A and 8B provided at both ends of the web 2C, as shown in FIG.
Holes 10A and 10B penetrating the web 2C are formed at the ends of the rail 1A. Holes 10C and 10D that penetrate the web 2C are formed at the ends of the rail 1B.

The shape-memory alloy rail seam member 3A is a member that holds the rails 1A and 1B in close contact with each other by a shape restoring force and prevents a gap from being generated in the seam 1C. As shown in FIG. 3, the holes 10A, 10B, 10C, and 10D are used. Holes 4A, 4B, 4C, and 4D are formed at the positions corresponding to.
The holes 4A and 4D are holes for fixing the shape memory alloy rail joint member 3A to the rails 1A and 1B. The holes 4B and 4C are long holes along the acting direction of the shape restoring force, and the screw shaft 13A of the heating device 100 to be described later penetrates therethrough.
As shown in FIG. 3, the shape memory alloy rail seam member 3B is also a member that brings the rails 1A and 1B into close contact with each other by the shape restoring force and prevents a gap from being generated at the seam 1C. Holes 6A, 6B, 6C and 6D are formed along the projecting direction.
The holes 6A and 6D are holes for fixing the shape memory alloy rail joint member 3B to the rails 1A and 1B. The holes 6B and 6C are long holes along the acting direction of the shape restoring force, and the screw shaft 13A of the heating device 100 described later penetrates therethrough.

By inserting the bolt 21 into the hole 6A of the shape memory alloy rail joint member 3B, the hole 10A of the rail 1A, and the hole 4A of the shape memory alloy rail joint member 3A and fastening them with the nut 23, as shown in FIG. The shape memory alloy rail joint members 3A and 3B are fixed to the rail 1A.

Similarly, by inserting the bolt 25 into the hole 4D of the shape-memory alloy rail joint member 3A, the hole 10D of the rail 1B, and the hole 6D of the shape-memory alloy rail joint member 3B and fastening them with the nut 27, the shape-memory alloy is formed. The rail joint members 3A, 3B are fixed to the rail 1B.
In this state, specifically, the state shown in FIG. 1, the rails 1A and 1B are connected by the shape memory alloy rail joint members 3A and 3B.

In the rail connection structure 200, both side surfaces of the web 2C are connected so as to connect the rails 1A and 1B in a state in which the restoring ranges 22A and 22B for exerting the shape restoring force of the shape memory alloy rail joint members 3A and 3B are stretched and deformed. The rails 1A and 1B can be brought into close contact with each other by heating the restoration areas 22A and 22B and then restoring them.

The restoration ranges 22A and 22B do not necessarily have to be the entire shape memory alloy rail joint members 3A and 3B. For example, the restoration range 22A may be between the holes 4A and 4D, and the restoration range 22B may be between the holes 6A and 6D. This is because the holes 4A, 4D (6A, 6D) are holes for connecting the rail joint members 3A (3B) made of shape memory alloy and the rails 1A, 1B, and there is no need to restore the surroundings.

Next, an outline of the structure of the heating device 100 according to the first embodiment will be described with reference to FIGS. 3 to 5.

The heating device 100 is a device that simultaneously heats the shape memory alloy rail joint members 3A and 3B to exert a shape restoring force. As shown in FIGS. 3 to 5, the heating elements 28A, 28B, 30A, 30B and the springs are used. A bolt 13 is provided.
The heating elements 28A, 28B, 30A, 30B are members that heat the restoration ranges 22A, 22B by non-thermal power, and are provided so as to sandwich the outside of the pair of shape memory alloy rail joint members 3A, 3B as shown in FIG. Has been.
As shown in FIG. 3, the heating elements 28A and 30A are provided outside the shape memory alloy rail joint member 3A, and the heating elements 28B and 30B are provided outside the shape memory alloy rail joint member 3B.

As shown in FIG. 3, the heating elements 28A, 28B, 30A, 30B include heating plates 7A, 7B, 9A, 9B and heating plates 7A, 7B, which come into close contact with the outer surfaces of the shape memory alloy rail joint members 3A, 3B. A plurality of electric heaters 11 inserted inside 9A and 9B are provided.
The spring-equipped bolt 13 is a pressing portion that presses the heating surfaces of the heating elements 28A, 28B, 30A, 30B against the outer surfaces of the shape memory alloy rail joint members 3A, 3B to bring them into close contact.

The heating device 100 also has heat insulating materials 15A, 15B, 17A, 17B provided outside the heating plates 7A, 7B, 9A, 9B.

As shown in FIG. 5, the heating device 100 is connected to the electric heater 11 and is connected to the control unit 103 that controls the temperature and heat generation time of the electric heater 11, and is connected to the control unit 103 and the electric heater 11. It also has a power supply 104 for supplying power.

The above is the outline of the structure of the heating device 100 according to the first embodiment.

Next, details of the structure of the heating device 100 will be described with reference to FIGS.
As shown in FIG. 3, the heating plates 7A, 7B, 9A, 9B are plate-shaped members that contact and heat the shape memory alloy rail joint members 3A, 3B.

As shown in FIG. 3, the heating plates 7A and 9A are formed with through holes 14A and 16A orthogonal to the heating surface at positions corresponding to the holes 10B of the rail 1A and the holes 10C of the rail 1B. A screw shaft 13A of a bolt 13 with a spring, which will be described later, is inserted into the through holes 14A and 16A.
As shown in FIG. 3, the heating plates 7B and 9B are provided with through holes 14B and 16B orthogonal to the heating surface at positions corresponding to the holes 10B of the rail 1A and the holes 10C of the rail 1B. A screw shaft 13A of a bolt 13 with a spring, which will be described later, is inserted into the through holes 14B and 16B.

As shown in FIG. 3, the heating plates 7A, 7B, 9A, 9B have a storage recess 20 for storing the electric heater 11 in the upper end surface.

The heating plates 7A, 7B, 9A, 9B are required to have heat resistance in a heating temperature range and transferability for transferring heat generated from the electric heater 11.
Examples of the material satisfying such requirements include stainless steel, but the material is not limited to stainless steel.

In the first embodiment, as shown in FIGS. 4, 5 and 6, one shape memory alloy rail joint member 3A (3B) includes a plurality of (two in this case) heating plates 7A, 9A (7B). , 9B) and heat insulating materials 15A, 17A (15B, 17B) are provided, but the numbers of heating plates and heat insulating materials are not particularly limited. Only one heating plate may be provided in one shape memory alloy rail joint member 3A (3B), or three or more heating plates may be provided, as long as the restoration ranges 22A and 22B can be uniformly heated.

However, by providing a plurality of heating plates and heat insulating materials on one shape memory alloy rail joint member 3A (3B), it is easy to follow up when the shape memory alloy rail joint member is deformed by heating.

The electric heater 11 is a cylindrical cartridge heater embedded in the heating plates 7A, 9A and the heating plates 7B, 9B as shown in FIGS. 8 and 9, and a heating coil for heating by energization as shown in FIG. It has 11C inside. The heating coil 11C is connected to the external terminals 11A and 11B, and the external terminals 11A and 11B are connected to the control unit 103. However, the electric heater 11 is not limited to the cartridge heater and may be a sheath heater.

In this way, the heating device 28A, 28B, 30A, 30B has the heating plate 7A, 7B, 9A, 9B and the electric heater 11 embedded in the heating plate 7A, 7B, 9A, 9B. The alloy rail joint members 3A and 3B can be heated.

As shown in FIGS. 3, 4, and 5, the heat insulating materials 15A, 15B, 17A, and 17B are located outside the heating plates 7A, 7B, 9A, and 9B (opposite to the side in contact with the shape memory alloy rail joint members 3A and 3B). It is a member that suppresses heat radiation from the side). By providing the heat insulating materials 15A, 15B, 17A, and 17B, it is possible to suppress heat radiation from surfaces other than the surfaces in contact with the shape memory alloy rail joint members 3A and 3B in the heating plates 7A, 7B, 9A, and 9B.

As shown in FIG. 3, the heat insulating materials 15A, 15B, 17A, and 17B are provided with holes 24A, 24B, 26A, and 26B for passing the spring bolts 13.
It is preferable that at least the surfaces of the heat insulating materials 15A, 15B, 17A, 17B that are in contact with the heating plates 7A, 7B, 9A, 9B are made of a material having a smaller heat transfer coefficient than the heating plates 7A, 7B, 9A, 9B. .. Such materials include, but are not limited to:
First, an inorganic heat insulating material such as Hemisal (registered trademark) manufactured by Nichias Co., Ltd.
Next, cement in which a heat insulating aggregate such as pearlite is kneaded is also included.
Further, a cement material obtained by low-foaming and refining is also included.
In addition, an inorganic fiber heat insulating material such as a blanket can also be used. As the blanket, one that is attached in advance to a steel plate or the like can be used.

The spring-loaded bolt 13 presses the heating plates 7A, 7B, 9A, 9B against the shape memory alloy rail joint members 3A, 3B via (the heat insulating materials 15A, 15B, 17A, 17B) to enhance the heat transfer efficiency. It is a member.

As shown in FIG. 3, the spring bolt 13 includes a coil spring 13B as a biasing member that biases the heating plates 7A, 7B, 9A, and 9B from the out-of-plane direction, and a screw shaft 13A that is inserted into the coil spring 13B. , And has a pair of nuts 13C screwed to both ends of the screw shaft 13A.

The spring bolt 13 is fixed to the heating plate 7A and the heating plate 7B by the following procedure.
First, the screw shaft 13A, the hole portion 24A of the heat insulating material 15A, the through hole 14A of the heating plate 7A, the hole 4C of the shape memory alloy rail joint member 3A, the hole 10C of the rail 1B, the shape memory alloy rail joint member 3B. 6C, the through hole 14B of the heating plate 7B and the hole 24B of the heat insulating material 15B.
Next, the coil springs 13B are inserted from both ends of the screw shaft 13A.
Next, nuts 13C are screwed into both ends of the screw shaft 13A. As a result, the coil spring 13B is sandwiched between the nut 13C and the heat insulating material 15A or the heat insulating material 15B, and presses the heating plate 7A or the heating plate 7B.
Finally, the pressing force of the coil spring 13B is adjusted by rotating the nut 13C and adjusting the axial position of the screw shaft 13A.

The procedure for fixing the bolts 13 with springs to the heating plate 9A and the heating plate 9B is the same, so the description thereof will be omitted.

As described above, by providing the bolts 13 with springs as the pressing portions, the pressing force on the shape memory alloy rail joint members 3A, 3B can be individually adjusted only by adjusting the position of the nut 13C.

The above is the detailed description of the structure of the heating device 100.

Next, a method for heating the shape memory alloy rail joint members 3A and 3B using the heating device 100 will be described.

First, the shape memory alloy rail joint members 3A and 3B are fixed to the rails 1A and 1B.
Specifically, first, as shown in FIG. 3, the rails 1A and 1B are butted in the extending direction.

Next, as shown in FIG. 2, shape memory alloy rail joint members 3A and 3B are attached to both side surfaces of the rails 1A and 1B.
Next, as shown in FIG. 1, the bolt 21 is inserted into the hole 6A of the shape memory alloy rail joint member 3B, the hole 10A of the rail 1A, and the hole 4A of the shape memory alloy rail joint member 3A, and fastened with the nut 23. ..
Similarly, the bolt 25 is inserted into the hole 4D of the shape memory alloy rail joint member 3A, the hole 10D of the rail 1B, and the hole 6D of the shape memory alloy rail joint member 3B, and fastened with the nut 27.
Thereby, the shape memory alloy rail joint members 3A and 3B are fixed to the rails 1A and 1B.

Next, the constituent members of the heating device 100 are attached to the shape memory alloy rail joint members 3A and 3B.
Specifically, first, as shown in FIG. 3, the shape memory alloy rail joint members 3A and 3B are sandwiched between the heating plates 7A and 9A and the heating plates 7B and 9B. An electric heater 11 is attached to the heating plates 7A, 7B, 9A, 9B in advance.
Next, as shown in FIG. 3, heat insulating materials 15A, 15B, 17A and 17B are attached to the heating plates 7A, 7B, 9A and 9B.
Next, as shown in FIG. 3, the bolts 13 with springs are attached to the heating plates 7A, 7B, 9A, 9B, and the heating surfaces are pressed and brought into close contact with the outer surfaces of the shape memory alloy rail joint members 3A, 3B.
Finally, the electric heater 11 is connected to the control unit 103, and the control unit 103 is connected to the power supply 104.

Next, using the control unit 103, electric power is supplied from the power source 104 to the electric heater 11 to generate heat, and the shape memory alloy rail joint members 3A, 3B are heated via the heating plates 7A, 7B, 9A, 9B. As a result, the restoration ranges 22A and 22B are restored and the rails 1A and 1B come into close contact with each other.

For the heating time, the relationship between the temperature and heat generation time of the electric heater 11 when energized and the restoration amount of the shape memory alloy rail joint members 3A and 3B is obtained. It is measured in advance by determining the time sufficient for a given pressure to act.

When the heating time measured in advance has elapsed, the control unit 103 stops the supply of electric power to the electric heater 11 and stops the heating by the heating bodies 28A, 28B, 30A, 30B.

Finally, after the temperature of the heating plates 7A, 7B, 9A, 9B has dropped to some extent, the heating device 100 is removed from the shape memory alloy rail joint members 3A, 3B.

The above is the description of the method for heating the shape memory alloy rail joint members 3A and 3B using the heating device 100.

Thus, according to the first embodiment, the heating device 100 is provided so as to sandwich the outer sides of the pair of shape memory alloy rail joint members 3A and 3B, and heats the restoration ranges 22A and 22B by non-fire power. A bolt with a spring as a pressing portion that presses the heating elements 28A, 28B, 30A, 30B and the heating surfaces of the heating elements 28A, 28B, 30A, 30B to the outer surfaces of the shape memory alloy rail joint members 3A, 3B so as to closely contact them. Equipped with 13.

Therefore, the heating device 100 can heat the shape memory alloy rail joint members 3A and 3B by non-thermal power, and construction restrictions are less likely to occur than in the past.

Next, a second embodiment will be described with reference to FIG.
The second embodiment differs from the first embodiment in that a leveling bolt 33 as a pressing portion is horizontally adjustable in a fixing jig 31 fixed to the rails 1A and 1B.

In the second embodiment, elements having the same functions as those in the first embodiment are designated by the same reference numerals, and mainly different points from the first embodiment will be described.

As shown in FIG. 11, the heating device 100A according to the second embodiment has a fixing jig 31 for fixing the leveling bolt 33 as a pressing portion.
The fixing jig 31 has a pair of extending portions 35A and 35B, a pair of extending portions 35C and 35D, and a pair of connecting portions 37.
The bridging portions 35A and 35B are base portions for fixing the fixing jig 31 to the rails 1A and 1B, and are laid over the flanges 8A of the rails 1A and 1B.
The extending portions 35C and 35D are members extending downward from the pair of extending portions 35A and 35B.
The connecting portion 37 is an L angle (equilateral angle steel) that holds the leveling bolt 33. The connecting portion 37 connects the pair of extending portions 35C and 35D so that one of the L-shapes is oriented in the vertical direction and the other is oriented in the horizontal direction, and the portion oriented in the vertical direction faces the web side surfaces 2A, 2B. There is. A female screw hole is formed in the portion facing the vertical direction.
The leveling bolt 33 penetrates the cut hole of the connecting portion 37 in a direction facing the web side surfaces 2A and 2B, and the spring 33A is attached between the fixing jig 37 and the tip of the leveling bolt 33. ..
In this structure, the spring 33A adjusts the pressing force applied to the heating plates 7A, 7B, 9A, 9B.
In this way, the pressing portion may be held via the fixing jig 31.

With such a structure, the pressing portion can be positioned only by holding the fixing jig 31 on the rails 1A and 1B.

Next, a third embodiment will be described with reference to FIG.
In the third embodiment, the heating plates 7A and 9A and the heating plates 7B and 9B in the second embodiment are suspended and held by a fixing jig 31.

In the third embodiment, elements having the same functions as those in the second embodiment are designated by the same reference numerals, and mainly different points from the first embodiment will be described.

As shown in FIG. 12, the fixing jig 31 of the heating device 100B according to the third embodiment further includes a pair of erection members 39, a hanging bolt 51, and a connecting nut 53.

The erection member 39 is an L-angle (equilateral angle steel) that connects the bridging portions 35A and 35B in the extending direction of the rails 1A and 1B, and one of the L-shaped members is a vertical plate and the other is a horizontal plate. It is provided above 7A, 9A and heating plates 7B, 9B (positive direction in the Z direction). A female screw hole is formed in a portion facing the horizontal direction.

The hanging bolt 51 is a screw shaft for fixing the heating plates 7A, 9A and the heating plates 7B, 9B to the fixing jig 31, the upper end is screwed into the female screw hole of the erection member 39, and the lower end is the heating plates 7A, 9A, The heating plates 7B and 9B are screwed together.
The connecting nut 53 is a nut for fixing the suspension bolt 51 to the erection member 39, and is screwed onto the upper end of the suspension bolt 51 protruding from the erection member 39.
The positions of the heating plates 7A, 9A and the heating plates 7B, 9B in the Z direction can be adjusted by rotating the connecting nut 53 and moving the hanging bolt 51 in the Z direction.

In this way, the heating plates 7A and 9A and the heating plates 7B and 9B may be suspended and held by the fixing jig 31. With such a structure, the holding portion and the heating plates 7A and 9A and the heating plates 7B and 9B can be simultaneously positioned only by holding the fixing jig 31 on the rails 1A and 1B.

The present invention has been described above based on the embodiment, but the present invention is not limited to the above embodiment. Of course, those skilled in the art will come up with various modifications and improvements within the scope of the technical idea of the present invention, and these are also included in the scope of the present invention.

1A... Rail, 1B... Rail, 1C... Seam, 2A, 2B... Web side surface, 2C... Web, 3A, 3B... Shape memory alloy rail seam member, 4A, 4B, 4C, 4D... Hole, 6A, 6B, 6C , 6D... Hole, 7A, 7B... Heating plate, 8A, 8B... Flange, 9A, 9B... Heating plate, 10A, 10B, 10C, 10D... Hole, 11... Electric heater, 11A, 11B... External terminal, 11C... Heat generation Coil, 13... Bolt with spring, 13A... Screw shaft, 13B... Coil spring, 13C... Nut, 14A, 14B... Through hole, 15A, 15B... Thermal insulation material, 16A, 16B... Through hole, 17A, 17B... Thermal insulation material, 20... Storage recess, 21... Bolt, 22A, 22B... Restoration range, 23... Nut, 24A, 24B... Hole, 25... Bolt, 26A, 26B... Hole, 27... Nut, 28A, 28B... Heater, 30A , 30B... Heating element, 31... Fixing jig, 33... Leveling bolt, 33A... Spring, 35A, 35B... Straddling part, 35C, 35D... Extension part, 37... Connecting part, 39... Construction member, 51 ... Hanging bolts, 53... Connection nuts, 100... Heating device, 100A... Heating device, 100B... Heating device, 103... Control part, 104... Power supply, 200... Rail connection structure

Claims (7)

A heating device for a shape-memory alloy rail seam member that heats a pair of shape-memory alloy rail seam members that are provided on each of the web side surfaces of the rails and that bring the rails arranged along the traveling direction into close contact with each other by a shape-restoring force. There
A pair of heating bodies that are provided so as to sandwich the outer sides of the pair of shape memory alloy rail joint members, and a range in which a shape restoring force is applied, are heated by non-fire power,
A heating portion that presses the heating surfaces of the pair of heating bodies into close contact with the outer surfaces of the pair of shape memory alloy rail joint members,
A pair of bridging portions bridging the flanges of the rails, a pair of extending portions extending downward from the pair of bridging portions, and a pair of the extending portions are connected to each other, and the web side surface is formed. A fixture having a pair of connecting portions facing each other,
Equipped with
The heating device for a rail joint member made of shape memory alloy, wherein the pressing portion is fixed to the connecting portion . The heating device for a rail joint member made of a shape memory alloy according to claim 1,
The heating body includes a heating plate that is in close contact with the outer surface of the shape-memory alloy rail joint member, and a plurality of electric heaters that are inserted inside the heating plate. A heating device for joint members. The heating device for the shape-memory alloy rail joint member according to claim 2 ,
A heating device for a rail joint member made of a shape memory alloy, characterized in that a heat insulating material is provided outside the heating body. The heating device for the rail joint member made of a shape memory alloy according to claim 3 ,
The heating device for a shape-memory alloy rail joint member, wherein at least a surface of the heat insulating material that comes into contact with the heating body is formed of a material having a heat transfer coefficient smaller than that of the heating plate. The heating device for a rail joint member made of a shape memory alloy according to claim 3 or 4 ,
A heating device for a shape memory alloy rail joint member, wherein a plurality of sets of the heating body and the heat insulating material are provided in a range to which the shape restoring force of the shape memory alloy rail joint member is applied. The heating device for a rail joint member made of a shape memory alloy according to any one of claims 1 to 5 ,
The pair of bridging portions, a bridging member is laid along the extending direction of the rail,
The suspension member is provided with a plurality of suspension bolts along the extending direction of the rail,
The heating device for a shape-memory alloy rail joint member, wherein the heating element is fixed to the suspension bolt. A heating method for a shape-memory alloy rail seam member that heats a pair of shape-memory alloy rail seam members that are provided on each of the web side surfaces of the rail and that make the rails arranged along the traveling direction adhere to each other by a shape-restoring force. And
A step of sandwiching a range in which the shape restoring force of the pair of shape memory alloy rail joint members is applied with a pair of heating bodies from the outside,
A step of pressing the heating surfaces of the pair of heating bodies to the outer surfaces of the pair of shape memory alloy rail joint members to bring them into close contact;
Heating the pair of shape memory alloy rail seam members with the pair of heating elements;
A method of heating a rail joint member made of a shape memory alloy, which comprises performing a step of stopping heating by the pair of heating bodies when a heating time measured in advance has elapsed.

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