JP2002034104A - Ground coil device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ground coil device that enables reduction of the size a clamp shaft by restraining large bending moment from acting on the shaft, and to prevent the drop of an axial power by restraining, torque from acting on the shaft. SOLUTION: A round recessed part 12d is formed in an insert 12 buried in a concrete track 11, and a projecting part 12e is formed, extending from the end of the recessed part 12d to a large hole 12b. The clamp shaft 19 is passed through a coned disc spring 18, a plain washer 17, an adjusting plate 16, a metal bushing 15 and the insert 12. Then, the head 19a of the shaft 19 is rotated, being pressed to the metal bush 15 to fit the protruding part 19e of the shat 19 into the recessed part 12d of the insert 12. By making the protruding part 19e contact the projecting part 12e, the end 19d of the shaft 19 is supported rotatably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground-mounted coil device of a magnetic levitation railway.

[0002]

2. Description of the Related Art A ground-floor coil device of a magnetic levitation type railway is mounted on a side wall of a concrete track or a roadbed, and is electromagnetically induced by a superconducting magnet device mounted on a magnetic levitation type railway vehicle. A propulsion coil device for generating a propulsion force on the vehicle and a levitating coil device for guiding the levitating of the vehicle. The propulsion coil device is a concrete track between the levitating coil device and the concrete track by fastening means. And the floating coil device is fastened to the concrete track by fastening means.

FIG. 9 is a partial sectional view showing a configuration of a ground-mounted coil device disclosed in, for example, Japanese Patent Application Laid-Open No. 9-320843. In FIG. 9, 1 is a concrete track, 2
Is an insert buried in the concrete track 1, and a female screw is formed from the main surface side of the concrete track 1.
Reference numeral 3 denotes a mold resin of a ground-mounted coil device provided on the vehicle side (not shown), 4 denotes a coil conductor integrally cast with the mold resin 3, and 5 denotes a metal bush integrally cast with the mold resin 3, and penetrates. A hole is formed. Reference numeral 6 denotes a flat washer, 7 denotes a coned disc spring, and 8 denotes a tightening shaft formed of a bolt, which penetrates the coned disc spring 7, the flat washer 6, and the metal bush 5 and is screwed to the insert 2. The insert 2, the metal bush 5, the flat washer 6, the disc spring 7, and the tightening shaft 8 constitute a fastening means. Thermal expansion and contraction due to temperature change of the coil conductor 4;
The inner diameter of the metal bush 5 has a sufficient size with respect to the outer diameter of the tightening shaft 8 in order to avoid errors in laying the insert 2 on the concrete track 1 or manufacturing errors in the fastening means.

[0004] The conventional ground-mounted coil device is as described above. The ground-mounted coil device is provided with an electromagnetic force acting in a direction perpendicular to the axis of the fastening shaft 8 and a change in the temperature of the ground-mounted coil. Between the insert surface 2b and the raceway-side seating surface 5b of the metal bush 5, and between the vehicle-side seating surface 5a of the metal bush 5 and the raceway-side seating surface 6a of the flat washer 6 due to a load acting in a direction perpendicular to the axis of the metal bush 5. And a frictional force is generated.
Of these, the vehicle side seating surface 5a of the metal bush 5 and the flat washer 6
Is received by the bending rigidity of the tightening shaft 8 via the disc spring 7, and the frictional force is farthest from the screwing portion between the insert 2 and the tightening shaft 8. Therefore, a large bending moment acts on the tightening shaft 8. Further, the displacement of the metal bush 5 due to the thermal expansion and contraction caused by the temperature change of the ground laid coil acting in the direction perpendicular to the axis of the fastening shaft 8 is caused by the force for rotating the fastening shaft, that is, the couple force.

[0005]

In the above-mentioned conventional ground-mounted coil device, since a large bending moment acts on the tightening shaft 8, the tightening shaft 8 needs sufficient strength. There is a problem that the diameter of the shaft 8 must be increased or a material having high strength must be used. Also,
Since a couple acts on the tightening shaft 8 and causes the rotation of the tightening shaft 8 to loosen, there is a problem that the axial force of the tightening shaft 8 is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a ground-mounted coil capable of suppressing a large bending moment from acting on a tightening shaft and reducing the size of the tightening shaft. Get the device. It is another object of the present invention to provide a ground-installed coil device capable of suppressing a couple from acting on a tightening shaft and preventing a decrease in axial force.

[0007]

According to the present invention, there is provided a ground-installed coil apparatus in which a molded resin cast integrally with a coil conductor is fastened to a track by fastening means. The attaching means includes an insert buried in the track, a metal bush provided coaxially with the insert and cast integrally with the mold resin, and a fastening penetrated through the metal bush and rotatably supported by the insert. And an attached shaft.

The insert has a small hole portion and a large hole portion from the main surface side of the track, and a projection is formed from the end of the small hole portion to the large hole portion, and the fastening shaft has a flange at one end. The other end has a protrusion rotatably supported by the protrusion of the insert, and an elastic member is provided between the flange and the metal bush.

Further, the metal bush has a small-diameter portion and a large-diameter portion from the main surface side of the track and forms a step portion connecting the small-diameter portion and the large-diameter portion.

The insert has a small hole portion and a large hole portion from the main surface side of the track, and a projection is formed from the end of the small hole portion to the large hole portion. At the other end, a protruding portion of the insert and a rotatably supported projection are formed, a screw is provided with a detent, and an elastic member is provided between the detent and the metal bush. is there.

Further, the rotation stopper comprises a nut and a pin inserted into a small hole formed in a direction perpendicular to the axis of the tightening shaft.

The rotation stopper comprises a nut and a lock nut.

Still further, a portion where the insert and the tightening shaft are rotatably supported is formed in an arc shape.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a partial cross-sectional view showing a configuration of a ground-mounted coil device according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG.
FIG. 4 is a cross-sectional view of a main part (insert) of FIG. 1, FIG. 5 is an outline view of a main part (tightening shaft) of FIG.
FIG. 6 is a side view of FIG. 5 viewed from the direction C. 1 to 6
In the figure, 11 is a concrete track, 12 is an insert buried in the concrete track 11, and rectangular small holes 12 a and large holes 1 from the main surface side of the concrete track 11.
2b and a cap engaging portion 12c are formed, and an arc-shaped concave portion 12d is formed at an end of the small hole portion 12a.
The protrusion 12 extends from the end of the recess 12d to the large hole 12b.
e is formed.

Reference numeral 13 denotes a molding resin of a ground-mounted coil device provided on a vehicle (not shown), and 14 denotes a molding resin.
Coil conductor cast integrally in 3; 15 is insert 1
The through hole is formed by a metal bush provided coaxially with 2 and integrally cast with a mold resin 13. 16
Is an adjusting plate, 17 is a flat washer, and 18 is a disc spring. Reference numeral 19 denotes a fastening shaft made of, for example, stainless steel. The head 19a has a large-diameter flange 19b, the intermediate portion 19c has a small diameter, and the end 19d has a projection 19e.

The tightening shaft 19 includes a disc spring 18, a flat washer 17,
Adjustment plate 16, metal bush 15 and insert 12
Of the tightening shaft 19 after being inserted into the small hole 12a of the
9a is rotated while pressing the metal bush 15 against the metal bush 15 so that the protrusion 19e of the tightening shaft 19 is
d, and the projection 19e and the projection 12e are in contact with each other. Reference numeral 20 denotes a cap engaged with the bottom 12c of the insert 12. The insert 12, the metal bush 15, the adjusting plate 16, the flat washer 17, the disc spring 18 and the tightening shaft 19 constitute a fastening means. In order to avoid thermal expansion and contraction of the coil device due to a temperature change of the coil conductor 14, errors in laying the insert 12 on the concrete track 11, and errors in manufacturing the fastening means, the inner diameter of the metal bush 15 is the outer diameter of the tightening shaft 19. Has a sufficient size.

In the ground-mounted coil device according to Embodiment 1 of the present invention, the protrusion 19e of the fastening shaft 19 is
2 and the projection 19e and the projection 12
e, the end 19d of the tightening shaft 19 is not fixed but rotatably supported. For this reason, it is possible to suppress the bending moment from acting on the tightening shaft 19 and reduce the size of the tightening shaft. That is, the electromagnetic force acting on the above-ground coil device in the direction perpendicular to the tightening shaft 19 can be supported by the frictional force due to the pressing force of the disc spring.

Further, since the spring is supported by the spring force of the disc spring 18 which is an elastic member, the load for pressing the fastening means does not become excessive, so that the thermal stress acting on the mold resin 13 due to the heat generated by the coil conductor 14 can be reduced. For this reason, even when displacement occurs between the metal bush 15 and the insert 12 due to thermal expansion and contraction of the coil device due to a temperature change of the coil conductor 14, it is possible to suppress a couple from acting on the tightening shaft 19, It is possible to prevent a decrease in force.

Embodiment 2 FIG. 7 is a partial cross-sectional view showing a configuration of a ground-mounted coil device according to Embodiment 2 of the present invention. 7, the same reference numerals as those in FIGS. 1 to 6 denote the same or corresponding elements, and a description thereof will be omitted. Reference numeral 21 denotes a tightening shaft made of, for example, stainless steel. The head 21a has a threaded portion, and an end of the head 21a has a hole 21 into which a pin 22 is inserted.
b is formed on the other end 21d.
e. The tightening shaft 21 includes a disc spring 18, a flat washer 1
7. Small hole 1 of metal bush 15 and insert 12
2a, the head 21a of the tightening shaft 21 is rotated while pressing the head 21a of the tightening shaft 21 against the metal bush 15 with the nut 23 so that the protrusion 21e of the tightening shaft 21
2d, and the protrusion 21e and the protrusion 12e are in contact with each other.

Next, after the adjusting plate 16 is inserted so that there is no gap between the nut 23 screwed to the tightening shaft 21 and the hole 21b, 22 is inserted into the pin of the hole 21b to prevent the nut 23 from rotating. ing. In addition, insert 12, metal bush 15, flat washer 17, disc spring 18, nut 23, adjustment plate 1
6, the pin 22, and the tightening shaft 21 constitute a fastening means.

In the ground-mounted coil device according to Embodiment 2 of the present invention, the protrusion 21e of the fastening shaft 21 is
2 and the projection 19e and the projection 12
e, the end 21d of the tightening shaft 21 is not fixed but is supported rotatably. For this reason, it is possible to suppress the bending moment from acting on the tightening shaft 21 and to reduce the size of the tightening shaft. That is, the electromagnetic force acting on the above-ground coil device in the direction perpendicular to the tightening shaft 21 can be supported by the frictional force generated by the pressing force of the disc spring.

Further, since the spring is supported by the spring force of the disc spring 18 which is an elastic member, the load for pressing the fastening means does not become excessively large. For this reason, even when displacement occurs between the coil conductor 14 and the insert 12 due to thermal expansion and contraction of the coil device due to a temperature change of the coil conductor 14, it is possible to suppress a couple from acting on the tightening shaft 21, It is possible to prevent a decrease in force.

Further, after the necessary axial force is applied by the nut 23, the rotation is stopped, so that the adjustment work at the time of mounting the fastening means can be improved as compared with the first embodiment. In addition, as a detent of the nut 23, a lock nut may be provided instead of the pin 22, and a so-called double nut may be used.

Embodiment 3 FIG. FIG. 8 is a partial cross-sectional view showing a configuration of a ground-mounted coil device according to Embodiment 3 of the present invention. 8, the same reference numerals as those in FIGS. 1 to 6 denote the same or corresponding elements, and a description thereof will be omitted. In FIG.
Reference numeral 23 denotes a metal bush provided coaxially with the insert 12 and integrally cast with the molding resin 13. The metal bush 23 has a small diameter portion 23 a and a large diameter portion 23 from the main surface side of the concrete track 11.
b, a small-diameter portion 23a and a large-diameter portion 2 are formed.
3b is formed to connect to step 3b. Reference numeral 24 denotes a tightening shaft made of, for example, stainless steel. The head 24a is formed to have a large diameter and a flange 24b, the intermediate portion 24c is formed to have a small diameter, and the end 24d has a protrusion 24e.

The tightening shaft 24 presses the adjusting plate 16, the flat washer 17 and the disc spring 18 provided on the step portion 23c with the flange 24b, and further connects the large-diameter portion 23b of the metal bush and the small hole portion 12a of the insert 12. Then, the head 24a of the tightening shaft 24 is rotated while pressing it against the metal bush 15 so that the protrusion 24e of the tightening shaft 24 is fitted into the recess 12d of the insert 12, and the protrusion 24e and the protrusion 12e. The insert 12, the metal bush 15, the adjusting plate 16, the flat washer 17, the disc spring 18, and the fastening shaft 24 constitute a fastening means.

The ground-mounted coil device according to the third embodiment of the present invention is configured such that the projection 24e of the fastening shaft 24 is
2 and the projection 24e and the projection 12
The end 24d of the tightening shaft 24 is not fixed, but is rotatably supported because of the contact with e. For this reason, it is possible to suppress the bending moment from acting on the tightening shaft 24, and to reduce the size of the tightening shaft. That is, the electromagnetic force acting on the above-ground coil device in the direction perpendicular to the tightening shaft 24 can be supported by the frictional force generated by the pressing force of the disc spring 18.

Further, since the spring is supported by the disc spring 18 which is an elastic member, the load for pressing the fastening means does not become excessive, so that the thermal stress acting on the mold resin 13 due to the heat generated by the coil conductor 14 can be reduced. For this reason, even when displacement occurs between the coil conductor 14 and the insert 12 due to thermal expansion and contraction of the coil device due to a temperature change of the coil conductor 14, it is possible to suppress a couple from acting on the fastening shaft 24, It is possible to prevent a decrease in force.

Further, the step 23c of the metal bush 23
Since the adjusting plate 16, the flat washer 17 and the disc spring 18 are provided in the first embodiment, the length of the fastening shaft 24 can be shortened, and the size of the fastening means can be reduced.

[0029]

Since the present invention is configured as described above, it has the following effects.

In the above-mentioned ground-mounted coil device, the molded resin cast integrally with the coil conductor is fixed to the track by a fastening means, and the fastening means is provided on the track. An embedded insert, a metal bush provided coaxially with the insert and cast integrally with the mold resin, and a tightening shaft penetrated by the metal bush and rotatably supported by the insert. As a result, it is possible to suppress the bending moment from acting on the tightening shaft and to reduce the size of the tightening shaft. Also, it is possible to prevent the couple from acting on the tightening shaft and prevent a decrease in the axial force. It is possible to do.

Further, the insert has a small hole and a large hole from the main surface side of the track, and a projection is formed from the end of the small hole to the large hole, and the fastening shaft has a flange at one end. In addition, by forming a protrusion rotatably supported by the protrusion of the insert at the other end, a configuration in which a bending moment does not act on the tightening shaft can be achieved. Further, by providing the elastic member between the flange and the metal bush, the load for pressing the fastening means does not become excessive, so that the thermal stress acting on the mold resin due to the heat generated by the coil conductor can be reduced. Even if displacement occurs between the coil conductor and the insert due to thermal expansion and contraction of the coil device due to the temperature change of the coil device, it suppresses the couple acting on the tightening shaft,
It is possible to prevent a decrease in axial force.

Further, the metal bush has a small diameter portion and a large diameter portion from the main surface side of the track to form a step portion connecting the small diameter portion and the large diameter portion. A fastening tool such as a flat washer can be provided, and the length of the fastening shaft can be reduced.

The insert has a small hole portion and a large hole portion from the main surface side of the track, and a projection is formed from the end of the small hole portion to the large hole portion. The other end has a protruding part of the insert and a rotatably supported protrusion, which suppresses the bending moment from acting on the tightening shaft and makes the tightening shaft smaller. can do. Furthermore, by providing a rotation stopper in the screw portion and providing an elastic member between the rotation stopper and the metal bush,
Since the load for pressing the fastening means does not become excessive, the thermal stress acting on the mold resin due to the heat generated by the coil conductor can be reduced. Even when displacement occurs between them, it is possible to suppress a couple from acting on the tightening shaft and prevent a decrease in axial force.

Further, since the rotation stopper comprises a nut and a pin inserted into a small hole formed in a direction perpendicular to the axis of the tightening shaft, the rotation is stopped by the pin after the necessary axial force is applied by the nut. Therefore, the adjustment work at the time of mounting the fastening means can be improved.

Further, since the rotation stopper comprises a nut and a lock nut, after applying a necessary axial force with the nut,
Since the rotation is stopped by the lock nut, the adjustment work at the time of mounting the fastening means can be improved.

Further, by forming the part where the insert and the tightening shaft are rotatably supported in an arc shape,
It is possible to prevent the part from easily rotating and reducing the axial force.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view illustrating a configuration of a ground-installed coil device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a sectional view of a main part (insert) of FIG. 1;

FIG. 5 is an external view of a main part (tightening shaft) of FIG. 1;

FIG. 6 is a side view of FIG. 5 viewed from a direction C.

FIG. 7 is a partial cross-sectional view illustrating a configuration of a ground-mounted coil device that is Embodiment 2 of the present invention.

FIG. 8 is a partial cross-sectional view illustrating a configuration of a ground-mounted coil device according to a third embodiment of the present invention.

FIG. 9 is a partial sectional view showing the configuration of a conventional ground-mounted coil device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Track 12 Insert 12a Small hole 12b Large hole 12d Concave part 12e Projection 13 Mold resin 14 Coil conductor 15, 23 Metal bush 18 Disc spring (elastic member) 19, 21, 24 Tightening shaft 19b, 24b Flange 19d, 21d , 24d End 19e, 21e, 24e Projection 22 Pin 23a Small Diameter 23b Large Diameter 23c Step

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02K 41/02 H02K 41/02 Z F-term (Reference) 2D056 DA01 DA07 5E048 AA04 AB10 BA01 CB01 5H113 CC08 CD02 CD04 CD12 DB03 DB08 DB09 DB10 DB14 DC03 DC08 DC09 DC10 DC14 5H641 BB06 BB19 GG02 GG05 GG11 HH04 JA07

Claims (7)

[Claims] 1. A ground-installed coil device in which a molded resin cast integrally with a coil conductor is fastened to a track by fastening means, wherein the fastening means comprises: an insert embedded in the track;
A metal bush provided coaxially with the insert and integrally cast with the mold resin, and a tightening shaft penetrated by the metal bush and rotatably supported by the insert. Above ground laying coil device. 2. The insert has a small hole and a large hole from the main surface side of the track, and a protrusion is formed from an end of the small hole to the large hole, and a fastening shaft is provided at one end. 2. A projection having a flange, and a projection rotatably supported by the projection of the insert is formed at the other end, and an elastic member is provided between the flange and the metal bush. A ground-laying coil device as described. 3. The metal bush has a small diameter portion and a large diameter portion from the main surface side of the track, and a step portion connecting the small diameter portion and the large diameter portion is formed. 2
A ground-laying coil device as described. 4. The insert has a small hole portion and a large hole portion from the main surface side of the track, and a protrusion is formed from an end of the small hole portion to the large hole portion, and a fastening shaft is provided at one end. A screw portion is formed at the other end with a protrusion rotatably supported by the protrusion of the insert. The screw portion is provided with a detent, and the elasticity between the detent and the metal bush is provided. 3. The above-ground coil device according to claim 1, wherein a member is provided. 5. The above-ground coil device according to claim 4, wherein the rotation stopper comprises a nut and a pin inserted into a small hole formed in a direction perpendicular to the axis of the tightening shaft. 6. The above-ground coil device according to claim 4, wherein the rotation stopper comprises a nut and a lock nut. 7. The ground-laying coil device according to claim 1, wherein a portion where the insert and the tightening shaft are rotatably supported is formed in an arc shape.