JPH066965A - Ground coil and fixing method thereof - Google Patents

Abstract

PURPOSE:To prevent crack due to freezing of water by making a hole for inserting a fixing means at an insulating part where a conductor forming a ground coil is molded into a predetermined shape and providing a buffer layer of predetermine thickness on the inner side face of the hole. CONSTITUTION:Thrust coils 1a, 1b being installed on the side wall of the track for vehicle are formed of conductors 3 and molded of resin into a predetermined shape. A plurality of holes 2 are made at the insulating part of the mold and inserted with stud bolts for securing the thrust coils 1a, 1b to the side wall. Silicone sealant 4 is then applied, by a predetermined depth, onto the inner side face of the hole 2 thus forming a buffer layer. Consequently, mold insulating part is easily protected against crack due to freezing of water. This method is also applicable to a levitation/guiding coil on the ground side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground coil that constitutes a magnetic levitation railway system and a method for mounting the coil.

[0002]

2. Description of the Related Art Ground coils constituting a magnetic levitation railway system are arranged in rows over both sides of a side wall of a track on which a vehicle runs. The ground coils include a propulsion coil that gives a propulsive force to the vehicle by electromagnetic action with a superconducting coil on the vehicle, and a levitation / guide coil that gives a levitation / guide force.
The order of attaching the ground coil to the side wall of the track is to attach the propulsion coil in two layers, and attach the levitation guide coil to the outside. Therefore, the conventional propulsion coil is attached by using the stud bolt for attaching the propulsion coil.

Here, a conventional method of attaching the propulsion coil to the side wall of the track will be described with reference to FIG. FIG. 5 is a partial cross-sectional view showing a state where a conventional propulsion coil is attached to the side wall of the track. The stud bolt 6 is attached to the propulsion coils 1a and 1b.
Mounting hole 2 in the mold resin part to be attached by
There are 8 places.

First, the first layer propulsion coil 1a is attached to the stud bolt 6 attached to the raceway side wall 7 via the washer 10 of the stud bolt 6 to the raceway side wall 7, and then the washer 11 is passed through the stud bolt 6 again. Second outside
The layer propulsion coil 1b is attached so as to be offset from the first layer propulsion coil 1a by half. Then, it is tightened by the washer 8 and the nut 9 to fix the two layers of the propulsion coils 1a and 1b to the track side wall 7. Further, a levitation / guide coil is attached to the outer side of the track by a bolt provided on the side wall 7 of the track and a mounting portion provided on the side wall 7. Here, since the ground coil is installed outdoors, rainwater may infiltrate into the mounting hole provided in the molded resin part of the ground coil and freeze it.Therefore, the resin part in this mounting hole may expand due to the expansion of ice. Sometimes cracks occurred. Furthermore, this crack may lead to destruction of the resin portion.

Therefore, in the conventional ground coil, a groove is provided around the mounting hole, or a notch or a small hole is provided in a part of the tightening washer so that water does not stay in the mounting hole of the coil. Was there.

[0006]

However, in the above-mentioned conventional ground coil, in the retention preventing mechanism for preventing cracks generated in the resin portion due to freezing of rainwater or the like in the mounting hole, the surrounding area of the resin portion of the ground coil is There was a problem that the groove was weakened by the groove and became the starting point of destruction. Further, when the washer is provided with a notch or a small hole, it is difficult to position the notch or the small hole for rainwater or the like to flow out from the hole, which causes a problem in strength.

Therefore, the present invention eliminates the above-mentioned drawbacks and prevents cracks generated in the resin due to freezing of rainwater accumulated in the mounting holes of the ground coil without forming grooves in the ground coil or weakening the mounting strength of the stud bolts. However, it is an object of the present invention to provide a ground coil which improves its workability and a method of mounting the coil.

[0008]

In order to achieve the above object, according to the present invention of claim 1, an electric current that generates an electromagnetic action is formed between an on-vehicle coil that is formed in a predetermined shape and is mounted on a vehicle. A flowing conductor, an insulating part having a mounting hole for fixing the insulating part to the side wall of the track on which the vehicle is traveling, and fixing the insulating part to the side wall of the track on which the vehicle runs, and a predetermined thickness on the inner surface of this mounting hole. And a buffer layer formed in.

According to the second aspect of the present invention, the ground is provided with a conductor formed in a predetermined shape, an insulating portion for molding the conductor in a predetermined shape, and a mounting hole provided in the insulating portion. A step of forming a buffer layer on at least one of the inner surface of the mounting hole of the coil or the outer periphery of the fixing means for fixing the ground coil on the side surface of the track on which the vehicle travels, and the fixing means for fixing this ground coil on the side wall of the track Attaching the ground coil through the mounting hole of the ground coil to this fixing means, and attaching the ground coil to the side wall of the track, and after mounting the ground coil to the fixing means, the fastening means is provided to the fixing means to fix the ground coil to the side wall of the track. And a step of performing.

Further, according to the present invention of claim 3, there is provided a ground coil comprising a conductor formed in a predetermined shape, an insulating portion for molding the conductor in a predetermined shape, and a mounting hole provided in the insulating portion. The step of filling the mounting hole with the filling member, the step of attaching the fixing means for fixing the ground coil to the side wall of the track, and the step of attaching the ground coil to the side wall of the track through the filling member filled in the mounting hole of the ground coil in this fixing means. And attaching the ground coil to the fixing means and then providing the fastening means to the fixing means to fix the ground coil to the side wall of the track.

[0011]

With the above-mentioned structure, the ground coil of the invention of claim 1 is mounted on the side wall of the track by fastening the fixing means provided on the side wall of the track on which the vehicle travels through the mounting hole provided on the ground coil by the fastening means. The force exerted on the side surface of the mounting hole due to the volume expansion of the ground coil due to the freezing of the water accumulated in the mounting hole is mitigated by the buffer layer, and the crack generated in the insulating portion of the ground coil at the mounting hole can be prevented.

According to the second aspect of the present invention, the buffer layer is formed on at least one of the inner surfaces of the mounting holes of the ground coil on the outer periphery of the fixing means so that the insulating portion of the ground coil due to freezing of water accumulated in the mounting holes is formed. A crack that occurs can be prevented, the work can be simplified, and the workability of the work for attaching the ground coil can be improved.

Further, according to the invention of claim 3, the filling member is filled in the mounting hole of the ground coil, and the ground coil is mounted on the side wall of the track by using the fixing means, whereby the mounting hole is filled with the filling member. Water does not enter the holes, that is, the freezing of water prevents cracking of the insulation. Therefore, it is possible to further improve the reliability of the ground coil and also to improve the workability of the work.

[0014]

[Embodiment] In the present embodiment, the case of application to a propulsion coil among ground coils will be described below with reference to the drawings.

An embodiment of the invention described in claim 1 will be described in detail with reference to FIG. 1A and 1B relate to an embodiment of a propulsion coil according to claim 1, wherein FIG. 1A is a front view of the propulsion coil, and FIG. 1B is a sectional view taken along line AA of FIG.

In FIG. 1, a propulsion coil 1a, 1b is formed of a torso track-shaped conductor 3 in a predetermined shape with a resin which is an insulating portion. Further, at the time of molding with resin, eight mounting holes 2 are provided for mounting with bolts on the molded resin portion. Then, the inner surface of the mounting hole 2 is uniformly coated with a silicon sealant 4 with a predetermined thickness to form a buffer layer. Therefore, a method of mounting the propulsion coils 1a and 1b of the invention according to claim 1 will be described with reference to FIG. FIG. 2 is a partial cross-sectional view showing a state where the propulsion coil according to claim 1 is attached to the side wall of the track. First, the stud bolt 6 which is a fixing means is attached to the track side wall 7. Then, the first layer propulsion coil 1a is passed through the stud bolt 6 and attached to the side wall 7 of the raceway through the washer 10. Next, the washer 11 is passed through the stud bolt 8, and the second layer propulsion coil 1b is attached so as to be offset from the first layer propulsion coil 1a by half. Then, as the fastening means, the two layers of the propulsion coils 1a and 1b are fastened to the track side wall 7 with the washer 8 and the nut 9. Here, a comparative experiment will be described with respect to cracks generated in the mold resin portion due to freezing of the conventional propelling coil and water.

As shown in FIG. 5 described above, a freezing experiment was carried out using the conventional propulsion coils 1a and 1b mounted on the side wall 7 of the track by using a portion around one mounting hole 2. First, in a sink fully filled with water, water was completely put into the gap in the mounting hole 2, the bolts were fastened, and immediately put in a freezer (-20 ° C). In this way, after about 1 hour has passed, the freezer moves the propulsion coil 1a,
When 1b was taken out, most of the propulsion coils 1a and 1b were cracked from the mounting hole 2 part. The coil propulsion coils 1a and 1b used have a wall thickness of 46 mm, the mounting hole 2 has a diameter of 36 mm, and the bolt 6 is M20.

On the other hand, the propulsion coils 1a and 1b according to claim 1 were attached as shown in FIG. 2, and a freezing experiment was conducted using a portion around one attachment hole 2 as in the conventional propulsion coil. . Here, the wall thickness of the propulsion coils 1a and 1b and the diameter of the mounting hole 2 were the same as those of the conventional one, and the bolt was M20. Propulsion coil 1
As the silicone sealant 4 applied to the side surfaces of the mounting holes 2 of a and 1b, "Toshiba Silicon Sealant" (trade name) manufactured by Toshiba Silicone Co., Ltd. has a thickness of 1 mm or less. Even if a freezing experiment was performed with this, cracks in the mold resin portion at the two mounting holes did not occur.

As a result, in this embodiment, the propulsion coils 1a,
A buffer layer is formed by uniformly applying a silicon sealant 4 to a predetermined thickness on the inner surface of the mounting hole 2 of 1b, and the propulsion coils 1a and 1b are formed by the volume expansion that occurs when the water retained in the mounting hole 2 freezes. Since the force applied to the side surface of the mounting hole 2 is relieved, cracks caused in the mold resin portion of the mounting hole 2 portion due to freezing of water can be prevented. Further, the simple operation of applying the silicone sealant 4 to the inner surface of the mounting hole 2 can uniformly prevent the crack of the mold resin portion in the mounting hole 2 part. Therefore, the mounting work can be performed to prevent the cracks of the propulsion coils 1a and 1b. It is possible to prevent complexity and improve workability.

Next, the propulsion coil 1 according to the second aspect of the invention.
FIG. 3 shows an example of an attachment method using a and 1b.
Will be explained. FIG. 3 is a partial cross-sectional view showing a state in which a propulsion coil is attached to a side wall of a track according to an embodiment of the method for attaching a propulsion coil according to claim 2. In FIG. 3, first, before attaching the propulsion coils 1a and 1b to the track side wall 7, a predetermined thickness is provided on the outer periphery of the attachment portion of the propulsion coils 1a and 1b of the stud bolt 6 and the inner surface of the attachment hole 2 of the propulsion coils 1a and 1b. Then, the silicon sealant 4 is uniformly applied to form a buffer layer. Next, the stud bolt 6 is attached to the track side wall 7, and the attachment hole 2 for the propulsion coils 1a and 1b is attached to the stud bolt 6 at a predetermined position. Then, the two layers of the propulsion coils 1a and 1b are tightened with the washer 8 and the nut 9.

As a result, in the embodiment of claim 2, by applying the silicone sealant 4 to the outer periphery of the stud bolt 6 and the mounting holes 2 of the propulsion coils 1a and 1b,
Since the region for relaxing the force exerted on the side wall surface of the mounting hole 2 when the water staying in the mounting hole 2 freezes increases, it is possible to completely prevent the mold resin portion from cracking in the mounting hole 2 portion. Further, even when a large amount of water stays in the mounting hole 2, it becomes possible to prevent cracks in the mold resin portion.

Instead of applying the silicone sealant 4 to the stud bolts 6, a buffer layer is formed by applying a contracting rubber tape to the adhesive surface, inserting a thin rubber tube, or passing an FRP tube. The same effect can be obtained by forming and fastening the propulsion coils 1a and 1b.
Furthermore, by using these rubber pipes and FRP pipes, the volume of water entering the mounting hole 2 is reduced,
The force generated by the expansion due to the freezing of water is also weakened, cracks in the resin portion can be prevented, and the reliability of the propulsion coils 1a and 1b can be improved.

Further, an embodiment of the mounting method of the invention described in claim 3 will be described with reference to FIG. FIG. 4 is a partial cross-sectional view showing a state in which a propulsion coil is attached according to an embodiment of the propulsion coil attachment method of the third aspect.
In FIG. 4, first, the mounting holes 2 of the propulsion coils 1a and 1b are previously filled with a filling member such as a silicone gel 7 or grease. Then, the stud bolt 6 is attached to the side wall 7 of the track, and the stud bolt 8 is inserted into the silicone gel 7 filled in the attachment holes 2 of the propulsion coils 1a and 1b.
Then, the washer 8 and the nut 9 are fastened.

A freezing experiment was attempted on the propulsion coils 1a and 1b thus fastened with the stud bolts 6 using the portion around the one mounting hole 2 as described above. The liquid phase cold heat test (100 ℃ ~ 0 ℃) was conducted 10 times, and then -20 ℃
It was left in the refrigerator cooled to 1 hour for 1 hour. Then, no cracks were observed in the mold resin portion at the two mounting holes.

As a result, in the third embodiment of the mounting method, by filling the mounting hole 2 with the silicone gel 7, cracks in the molding resin of the propulsion coils 1a and 1b can be prevented, and water to the mounting hole 2 can be prevented. Intrusion can be completely prevented.

Although the present invention has been described with respect to a propulsion coil, the present invention can be applied not only to the propulsion coil but also to any coil of the bolt fastening system such as being applicable to the levitation / guide coil.

[0027]

As described above, according to the present invention, it is possible to prevent cracks caused by freezing of water in the mold insulating portion generated from the mounting holes of the propulsion coil, and the work for preventing the cracks is simplified. This makes it possible to prevent the work of attaching the propulsion coil from becoming complicated.

[Brief description of drawings]

FIG. 1 is a front view (a) and an AA cross-sectional view (b) of (a) showing an embodiment of a propulsion coil according to claim 1.

FIG. 2 is a partial cross-sectional view showing a state in which a propulsion coil is attached to a side wall of a track according to an embodiment of a method for attaching a propulsion coil according to claim 1.

FIG. 3 is a partial cross-sectional view showing a state in which a propulsion coil is attached to a side wall of a track according to an embodiment of the method for attaching the propulsion coil according to claim 2;

FIG. 4 is a partial cross-sectional view showing a state in which the propulsion coil is attached to the side wall of the track according to an embodiment of the method for attaching the propulsion coil according to claim 3;

FIG. 5 is a partial cross-sectional view showing a state in which a propulsion coil is attached to a side wall of a track by a conventional propulsion coil attachment method.

[Explanation of symbols]

 1a, 1b ... Propulsion coil 2 ... Mounting hole 3 ... Conductor 4 ... Silicon sealant 5 ... Silicon gel 6 ... Stud bolt

Claims (3)

[Claims] 1. A conductor which is formed in a predetermined shape and through which a current for generating an electromagnetic action flows between the coil and an on-vehicle coil mounted on the vehicle, and the conductor is molded in a predetermined shape so that the vehicle can run. An insulating portion having a mounting hole through which a fixing means for fixing the insulating portion is inserted, and a buffer layer having a predetermined thickness formed on the inner surface of the mounting hole. Ground coil to do. 2. An inside of the mounting hole of a ground coil, comprising a conductor formed in a predetermined shape, an insulating portion for molding the conductor in a predetermined shape, and a mounting hole provided in the insulating portion. Forming a buffer layer on at least one of a side surface or an outer periphery of a portion of the fixing means for fixing the ground coil to a track side wall on which the vehicle travels, and attaching the fixing means to the track sidewall. A step of attaching the ground coil to the side wall of the track through the attachment hole of the ground coil in the fixing means; and a fastening means provided in the fixing means after the ground coil is attached to the fixing means, And a step of fixing the ground coil to the side wall of the track. 3. A filling member for the mounting hole of a ground coil, comprising a conductor formed in a predetermined shape, an insulating portion for molding the conductor in a predetermined shape, and a mounting hole provided in the insulating portion. And a step of attaching a fixing means for fixing the ground coil to a side wall of a track on which a vehicle travels; and a step of attaching the ground coil to the side wall of the track through the filling member of the mounting hole of the ground coil in the fixing means. And a step of attaching the ground coil to the fixing means and then providing a fastening means to the fixing means to fix the ground coil to the side wall of the track. How to install.