JP5506505B2 - Feeder connection device - Google Patents

Description

  The present invention relates to a power supply line connection device for connecting ends of power supply lines in a power supply apparatus that supplies a driving power source to a moving body such as a transport vehicle using a power supply line in a contactless manner.

  Conventionally, for example, a non-contact power supply device that does not generate dust from a power supply line is used for power supply to a transport vehicle in a clean room or the like. A schematic configuration of such a power supply apparatus will be described with reference to FIG.

  The non-contact power supply apparatus 100 includes a power supply line 102 laid in a loop along the travel route of the transport vehicle 101, and a power supply apparatus 104 that supplies a high-frequency current to the power supply line 102 via a lead-in line 103. A plurality of feeders 102 are connected by a connecting device 106 according to the length and shape of the travel route.

  The transport vehicle 101 has a pair of pickup coils 105 that receive power from the power supply line 102 with the power supply line 102 sandwiched from above and below, and an induction current is generated in the pickup coil 105 by the high-frequency current flowing through the power supply line 102, Traveling in the direction of arrow A using the current as the drive power

  By the way, each power supply line 102 is adjusted in advance to a length suitable for configuring the travel route of the transport vehicle 101. However, the power supply line 102 is connected during connection work at a laying site due to wrapping generated during transportation. May not reach the predetermined position of the connection device 106, or conversely, the length of the power supply line 102 may remain.

  In order to cope with this problem, there has conventionally been proposed a feeder device for feeders that can easily connect the ends of feeder wires. This power supply line connecting device will be described with reference to FIG.

The feeder device 201 for feeding lines sandwiches each end portion of the feeding wires 202 that are spaced apart from each other and are electrically connected to each other, and two blade receiving spring portions 203 each having a substantially U shape, and these blade receiving springs. And a flexible conductor portion 204 that electrically connects the portions 203.

The power supply line 202 includes a conductor and a coating, and the exposed conductor is sandwiched between the blade receiving spring portions 203. The conductor portion 204 is attached to the blade receiving spring portion 203 by soldering, welding, caulking, or the like. The blade receiving spring portion 203 is curved so that the vicinity of the opening sandwiches the power supply line 202. Feed line 202 is inserted through the opening of the blade receiving springs 203, is attached to the power supply conductor connection device 201 by being sandwiched by the blade receiving springs 203. With such a configuration, the power supply line 202 can be attached simply by inserting the power supply line 202 into the opening of the blade receiving spring part 203.

  By the way, there is disclosed a wiring duct joiner provided with a flexible insulating sheet interposed between a connecting wire of a wiring duct and a base plate (see, for example, Patent Document 1), and noise on the power feeding duct system side is disclosed. There is also disclosed a noise absorber for a power supply duct that protects an electrical device by absorbing water (see, for example, Patent Document 2).

Japanese Utility Model Publication No. 61-142382 Japanese Patent Laid-Open No. 9-182286

  However, in the above conventional feeder connecting apparatus 201, as shown in FIG. 10B, a leakage magnetic flux 206 is generated in the opening of the pickup coil 205 having a substantially C-shaped cross section due to the influence of the magnetic field generated in the feeder 202. ing.

When being outputted from the pickup coil 205 and the conductor portion 204 and the blade receiving pickup coil 205 during the placement of the spring portion 203 are overlapped in a power receiving, the conductor portion 204 and the blade due to the leakage magnetic flux 206 from the pickup coil 205 receives a spring There is a problem that magnetic flux is also generated in the portion 203, and an eddy current as shown in FIG. 10C is generated so as to cancel the increase of the magnetic flux in accordance with the electromagnetic induction law.

And the temperature of the conductor part 204 and the blade receiving spring part 203 rises by the thermal action (Joule heat) of this eddy current, and the problem that the connection apparatus 201 for feeders fires and smokes has arisen.

The present invention has been made in view of the above-described conventional problems, and reduces leakage magnetic flux generated in the pickup portion when the pickup portion and the conductor portion and the blade receiving spring portion overlap each other, thereby reducing the conductor portion and the blade receiving portion. It is an object of the present invention to provide a connecting device for a feeder line that prevents the temperature of the spring portion from rising due to generation of eddy current.

In order to achieve the above object, the present invention provides a feed line connecting device for connecting between opposite ends of a feed line used in a non-contact type feed device. A pair of blade receiving spring portions that are electrically connected to the power supply line, and a flexible conductor disposed between the blade receiving spring portions to electrically connect the blade receiving spring portions. And a magnetic body that is disposed at least on the bottom side of the conductor portion and reduces the generation of leakage magnetic flux in the pickup portion that is inductively coupled to the feeder line.

Further, in this power supply line connecting device, the magnetic body has a rectangular parallelepiped shape, and is disposed at the bottom portion of the blade receiving spring portion and the conductor portion so that the side surface of the magnetic body and the inner side surface of the opening of the pickup portion face each other. It is preferable.

  Further, in the power supply line connecting device, it is preferable that the outer periphery of the power supply line connecting device is further covered with a cover made of an insulating material.

The cover in this feed line connection device, the magnetic body is composed is located at the bottom of the spring portion and the conductor portion receiving blades in a rectangular parallelepiped shape, a further blade receiving each of the upper and side surfaces of the spring portion and the conductor portion with an insulating material It is preferable to cover with.

According to the feeder device for connecting a power line according to the present invention, it is possible to reduce the occurrence of leakage magnetic flux in the pickup section by providing the magnetic body. For this reason, eddy currents are generated in the conductor part and blade receiving spring part of the feeder connection device due to the magnetic flux leakage from the pickup part, reducing the risk of the conductor part and blade receiving spring part rising in temperature and igniting and smoking. it can.

(A) The block diagram of the non-contact electric power feeder provided with the some connection apparatus, (b) The perspective view of a non-contact-type electric power feeder. (A) The perspective view of the connection apparatus for feeders which concerns on embodiment of this invention, and a magnetic body, (b) The perspective view of the connection apparatus for feeders of a type using a contact member, and a magnetic body. (A) The top view of the connection apparatus for feeders which concerns on embodiment of this invention, (b) The front view of the connection apparatus, (c) Sectional drawing of the connection apparatus. The front view of the connection apparatus for feeders which has a contact member. Explanatory drawing of the flow of the leakage magnetic flux which arises in a pick-up part. (A) The front view of the same connection apparatus which attached the electric power feeding line, (b) The side view of the same connection apparatus. (A) The top view of the connection apparatus which concerns on the 1st modification of embodiment same as the above, (b) The front view of the connection apparatus, (c) Sectional drawing of the connection apparatus. (A) The front view of the connection apparatus which concerns on the 2nd modification of embodiment same as the above, (b) The front view of the connection apparatus, (c) Sectional drawing of the connection apparatus. The block diagram of the non-contact electric power feeder provided with the conventional connection apparatus. (A) Perspective view of a conventional feeder device for a power supply line, (b) explanatory diagram of leakage magnetic flux generated in a pickup section, (c) an explanatory diagram of eddy current generated in a conductor portion of the feeder device for a feeder line.

  A power line connecting device (hereinafter referred to as a connecting device) according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment)
As shown in FIG. 1A, the connecting device 1 according to the present embodiment is, for example, an opposite end portion of a power supply line 2 used in a non-contact power supply device 10 for a transport vehicle 11 traveling in a clean room. They are electrically connected. A plurality of feeders 2 are connected by the connecting device 1 and are laid in a loop so as to follow the traveling route of the transport vehicle. In addition, a power supply device 14 for supplying a high-frequency current is connected to a portion of the feeder line 2 laid in such a manner through a lead-in line 13.

  The transport vehicle 11 has a pickup unit 12 arranged close to the power supply line 2, and when the pickup unit 12 crosses the magnetic field lines of the magnetic field generated around the power supply line 2 by the high-frequency current flowing through the power supply line 2. An induced current is generated in the coil of the pickup unit 12. In this way, the transport vehicle 11 travels in the direction of arrow A using the voltage received by the pickup unit 12 as drive power.

  As shown in FIG. 1B, the pickup unit 12 includes a core having a substantially C-shaped vertical section surrounding the feeder line 2 along the sliding direction, and a coil formed by winding a winding wire around the core. ing. In the core, an opening groove through which at least the feed line can pass in the radial direction is provided along the axial direction of the feed line, and at least one of the inner peripheral surface and the outer peripheral surface is configured by a curved surface.

  The feed line 2 includes, for example, a cylindrical inner tube portion, a cylindrical outer tube portion arranged outside the inner tube portion, and a connecting portion that connects the inner tube portion and the outer tube portion so as to be concentric with each other. However, the conductor integrally formed by bending the metal plate is covered with an insulator made of a synthetic resin molded product having a rectangular tube shape.

  In this way, in the non-contact type power supply device 10, the design of the power supply line 2 can be changed in a limited space such as a clean room by connecting the opposing ends of the power supply line 2 using a plurality of connection devices 1. Can be placed.

  As shown in FIG. 2, the connection device 1 includes a pair of blade receiving spring portions 3 that are electrically connected to the power supply line 2 by sandwiching each of the end portions of the power supply line 2 that are spaced apart from each other and facing each other. The flexible conductor part 4 which electrically connects between the spring parts 3 and the rectangular parallelepiped-shaped magnetic body 5 arrange | positioned at the bottom part of the blade receiving spring part 3 and the conductor part 4 are provided.

  In the connecting device 1 shown in FIG. 2A, the blade receiving spring portion 3 is constituted by a spring member 32 that sandwiches the feeder 2 from both sides. The spring member 32 is made of a material having a low electrical resistance, such as copper, for example, and is preferably made of a material having high elasticity so as to strongly clamp the power supply line 2. The spring member 32 is a sheet metal bent into a substantially U shape, and the vicinity of the opening is curved in accordance with the shape of the power supply line 2 in order to sandwich the power supply line 2.

In the connecting device 1 shown in FIG. 2B, the blade receiving spring portion 3 includes a contact member 31 that contacts the power supply line 2 with a small electrical resistance, and a spring member 32 that clamps the contact member 31 and the power supply line 2 from both sides. And have. In this case, the spring member 32 is made of a material having a relatively high electric resistance, and is preferably made of a material having high elasticity so as to firmly hold the power supply line 2, for example, iron. The contact member 31 is attached to the inner surface on one side in the vicinity of the opening of the spring member 32, and is made of a material having a low electrical resistance such as copper.

  In the connecting device 1 shown in FIG. 2A, the conductor portion 4 is attached to the spring member 32 by soldering, welding, caulking, or the like. In the case of the connecting device 1 shown in FIG. 2B, the conductor portion 4 is attached to the contact member 31.

  The magnetic body 5 is a substance capable of being magnetized, and representative materials include iron oxide, chromium oxide, cobalt, and ferrite. Further, the magnetic body 5 is a magnet in a solid state, and can be used as a flexible magnet sheet when mixed with synthetic rubber to form a plate.

As shown in FIGS. 3 and 4, the magnetic body 5 is formed on the bottom of the conductor portion 4 and the blade receiving spring portion 3 so that the side surface of the rectangular parallelepiped magnetic body 5 and the inner surface of the opening of the pickup portion 12 face each other. Be placed. Further, as shown in FIG. 5, the magnetic body 5 corrects a magnetic path that leaks from the opening 12 a of the pickup unit 12, thereby preventing the occurrence of leakage magnetic flux. Therefore, no eddy current is generated in the conductor portion 4 and the blade receiving spring portion 3.

Next, the current flow in the connection apparatus 1 will be described with reference to FIG. As shown in FIGS. 6A and 6B, current flows from one power supply line 2 through the blade receiving spring part 3 and the conductor part 4, and then flows through the other blade receiving spring part 3 and the power supply line 2.

  In the connection device 1 using the contact member 31 shown in FIGS. 2B and 4, the spring member 32 is in contact with the contact member 31, but the electrical resistance of the spring member 32 is higher than that of the contact member 31. Most of the current flows through the contact member 31 and only a small amount of current flows through the spring member 32. For this reason, the current distribution in the connection device 1 becomes the width of the contact member 31 without spreading.

As described above, in the connection device 1 according to the present embodiment, the blade receiving spring portion 3 and the conductor portion so that the side surface of the rectangular parallelepiped magnetic body 5 and the inner surface of the opening of the pickup portion 12 face each other. By arranging the magnetic body 5 at the bottom of 4, the magnetic path leaking from the opening 12 a of the pickup unit 12 can be corrected, and the generation of leakage magnetic flux from the pickup unit 12 can be reduced. For this reason, an eddy current does not generate | occur | produce in the blade receiving spring part 3 or the conductor part 4, the temperature rise of the blade receiving spring part 3 or the conductor part 4 can be suppressed, and the ignition / smoke of the connecting device 1 caused by the leakage magnetic flux is prevented. Can be prevented.

(First modification)
A first modification of the present embodiment will be described with reference to FIG. This modification has a structure in which the outer periphery of the connection device 1 according to the above embodiment is further covered with an insulating material cover 6 made of resin or the like.

  With this configuration, in this modification, the connection device 1 including the magnetic body 5 can be obtained by covering with a cover 6 made of an insulating material, and assembling is facilitated. In addition, by correcting the magnetic path with the magnetic body 5, it is possible to reduce the generation of leakage magnetic flux from the pickup portion and prevent the eddy current from being generated in the conductor portion 4. For this reason, the danger that the connection apparatus 1 will ignite and emit smoke can be reduced.

(Second modification)
A second modification of the present embodiment will be described with reference to FIG. In this modification, the magnetic body 5 having a rectangular parallelepiped shape is disposed at the bottom of the spring unit 3 and the conductor portion 4 receiving blades, the cover 7 made further blade receiver to each of the upper and side surfaces of the spring portion 3 and the conductor portion 4 with an insulating material Covered with.

With this configuration, the magnetic body 5 can correct the magnetic path of the leakage magnetic flux generated from the pickup portion, and prevent the eddy current from being generated in the conductor portion 4 and the blade receiving spring portion 3. Accordingly, it is possible to prevent ignition / smoke from the connection device 1. Moreover, the assembly of the connecting device 1 can be facilitated by using the cover 7.

The present invention is not limited to the configuration of the embodiment described above, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the magnetic body 5 is provided at the bottom of the blade receiving spring portion 3 and the conductor portion 4 of the connection device 1, but the same effect can be obtained by providing it only around the conductor portion 4. be able to.

DESCRIPTION OF SYMBOLS 1 Feeder connection apparatus 2 Feeder line 3 Blade receiving spring part 4 Conductor part 5 Magnetic body 6,7 Cover 11 Conveyance vehicle 12 Pickup part 12a Opening part 14 Power supply apparatus 31 Contact member 32 Spring member

Claims (4)

In the connection device for the feeder line that connects between the opposite ends of the feeder line used in the non-contact type feeder device,
A pair of blade receiving spring portions that are electrically connected to the power supply line by sandwiching each end of the power supply line that is spaced apart from each other and facing each other;
In order to electrically connect the blade receiving springs, a flexible conductor disposed between the blade receiving springs;
A feeder for connecting a feeder line, comprising: a magnetic body that is disposed at least on the bottom side of the conductor portion and reduces the generation of leakage magnetic flux in a pickup unit that is inductively coupled to the feeder line. The magnetic body has a rectangular parallelepiped shape, and is arranged at the bottom of the blade receiving spring portion and the conductor portion so that a side surface of the magnetic body and an inner side surface of the opening of the pickup portion face each other. The power feeder connecting device according to claim 1.   The power supply line connecting device according to claim 2, wherein an outer periphery of the power supply line connecting device is further covered with a cover made of an insulating material. The magnetic body is arranged in a rectangular parallelepiped shape at the bottom of the blade receiving spring part and the conductor part,
2. The feeder connection device according to claim 1, further comprising a cover made of an insulating material covering the upper surface and side surfaces of each of the blade receiving spring portion and the conductor portion.

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