JP2010042690A - Electric power lead-in device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric power lead-in device for leading a feeder into a power source in a non-contact power supply system, capable of preventing the voltage induced at a pickup coil from dropping in a lead-in path. <P>SOLUTION: The lead-in device 1 is provided with a leaf spring 11 inserted into each of end portions of the feeders 3 adjacent to each other and a lead-in line 13 connected to each of the leaf springs 11 and to the power source 4. The lead-in paths 14A, 14B formed by the leaf springs 11 and the lead-in lines 13 are disposed to have an overlapped portion 15 running along a lengthwise direction of the feeders 3 between the feeders 3 adjacent to each other. The retraction paths 14A, 14B have an overlapped portion, thus preventing degradation of the density of lines of magnetic forces. Besides, when a carrier car passes through the lead-in path, the voltage induced at the pickup coil 5 does not drop, thus exactly controlling the running of the carrier car. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power drawing device for drawing a power supply line into a power supply in a power supply system that supplies driving power to a moving body such as a transport vehicle in a non-contact manner.

  For example, a non-contact power supply system is employed for supplying power to the transport vehicle in a clean room so as not to generate dust. A schematic configuration of such a power feeding system will be described with reference to FIGS. The power supply system includes a power supply line 102 laid in a loop along the travel route of the transport vehicle 101, and a power supply device 104 that supplies a high-frequency current to the power supply line 102 via the lead-in device 100. The lead-in device 100 has a lead-in wire 103 connected to the end portion 102 a of the power supply line 102.

  The conveyance vehicle 101 has a pair of pickup coils 105 arranged in the upper and lower directions close to the power supply line 102, and an induction current is generated in the pickup coil 105 by a high-frequency current flowing in the power supply line 102, Travels in the direction of arrow A as drive power.

On the other hand, in order to connect a lead-in line to the end of the power supply line or to connect a plurality of power supply lines adjusted to a predetermined length to form a power supply path along the travel path of the transport vehicle, A terminal block is required. However, even if an attempt is made to lay a power supply line that has been adjusted to a predetermined length in advance at the site where the power supply system is installed along the travel route of the transport vehicle, the end of the power supply line is There may be a problem in that it does not reach a predetermined position, or conversely, the length of the feeder line is excessive. In order to solve such a problem, a power feeding system is known in which separate terminal blocks are provided on the forward path and the return path of a looped power feeding line (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 11-115559

  By the way, since the drawing-in device 100 of the power feeding system as shown in FIGS. 8 and 9 described above has the separation portion d of the feeding line in the drawing path, the current of the feeding line is separated by this separation portion d. As a result, the density of the magnetic field lines due to the magnetic field is greatly reduced, and the voltage induced in the pickup coil 105 when the transport vehicle 101 passes through the retracting device 100 is decreased as compared with the region other than the retracting device 100. If it does so, the drive electric power of the conveyance vehicle 101 may also fall and it may become impossible to perform exact traveling control.

  Therefore, the present invention solves the above-described problem, and the voltage induced in the pickup coil when a moving body such as a transport vehicle traveling along the power supply line passes through the power supply path of the power supply line to the power source. An object is to provide a power pull-in device that does not decrease.

  In order to achieve the above object, the invention of claim 1 is a power drawing device that is arranged at a connecting portion between adjacent power supply lines used in a non-contact power supply apparatus and supplies power from a power source to each power supply line. And at least two conductors electrically connected to the respective ends of the adjacent feeders, and lead wires to the power source connected to these conductors, and formed by the conductors and the lead wires. The lead-in path is arranged so as to have an overlapping portion along the feed line direction between adjacent feed lines.

  According to a second aspect of the present invention, in the power lead-in device according to the first aspect, the two conductors are protruded so that the respective side portions in the direction of the feeder line overlap each other toward the other conductor. The lead-in wire is connected to the tip of the portion.

  According to a third aspect of the present invention, there is provided the power lead-in device according to the second aspect, wherein the protruding portion protrudes with a width substantially equal to a width orthogonal to the feeder line direction of the conductor.

  According to a fourth aspect of the present invention, in the power lead-in device according to any one of the first to third aspects, the lead-in wire is a flat braided wire.

  According to a fifth aspect of the present invention, in the power lead-in device according to any one of the first to third aspects, the lead-in wire is a litz wire.

  According to the first aspect of the present invention, since the drawing path is arranged so as to have an overlapping portion along the direction of the power supply line (length direction), the density of the magnetic lines of force in the drawing path does not decrease, and the conveyance vehicle or the like The voltage induced in the pick-up coil does not decrease when the moving body passes through the pull-in path.

  According to the second aspect of the present invention, since adjacent power supply lines can be arranged on a straight line, the distance between the pickup coils provided so as to sandwich the power supply line is narrower than in the case where the power supply lines themselves are arranged in steps. Thus, the magnetic coupling between the pickup coil and the power supply line can be increased, and efficient power supply is possible.

  According to invention of Claim 3, the thermal radiation area of a conductor increases and the temperature rise of an electric power drawing-in apparatus can be suppressed.

  According to the invention of claim 4, since a large cross-sectional area can be obtained without increasing the thickness of the lead-in wire itself, a high-frequency current can be efficiently fed to the feeder line.

  According to the invention of claim 5, the temperature rise of the lead-in wire can be reduced, and consequently the temperature rise of the power lead-in device can be suppressed.

(First embodiment)
Hereinafter, a power pull-in device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. As shown in FIG. 1, the power lead-in device 1 of the present embodiment is disposed at a connecting portion between adjacent power supply lines 3 of a power supply line 3 laid in a loop along the travel route of the transport vehicle 2. A high-frequency current is supplied from the power supply device 4 to the feeder line 3 through the lead-in line 13. The transport vehicle 2 has a pair of pickup coils 5 arranged in the vertical direction in the vicinity of the power supply line 3, and the current induced in the pickup coil 5 by the high-frequency current flowing through the power supply line 3 is used as the drive power. Drive in direction A.

  As shown in FIGS. 2 to 4, the power pull-in device 1 includes a metal leaf spring (conductor) 11 that is electrically connected by sandwiching the copper wire 6 portion exposed from the coating 7 of the feeder 3. 11 and a lead-in wire 13 connected to the back surface of each leaf spring 11, 11 via a caulking metal fitting 12. With the leaf spring 11 and the lead-in wire 13, lead-in paths 14 </ b> A and 14 </ b> B to the respective end portions of the feeder 3 are formed. Adjacent feed lines 3 are arranged such that their end portions overlap each other vertically along the length direction of the feed line 3. In addition, the lead-in wire 13 is connected to each leaf spring 11 so as to be positioned on the distal end side of each feed line 3. As a result, the lead-in paths 14A and 14B have an overlapping portion 15 in orthographic view. As shown in FIG. 3, the overlapping portion 15 overlaps when viewed from any of the upper and lower pickup coils 5.

  The leaf spring 11 is a clip-shaped member formed by bending a rectangular metal sheet metal so that the side view is substantially U-shaped, and is opened sideways as shown in FIG. When the operator inserts the copper wire 6 portion of the feeder 3 into the opening 11a with a relatively strong pressure, the copper wire 6 is sandwiched and fixed by the elasticity of the leaf spring 11 itself.

  For example, a litz wire may be used as the lead-in wire 13. As a result, the heat generation amount of the lead-in wire 13 itself when a high-frequency current flows is small, so that the temperature rise of the lead-in wire 13 can be suppressed. As a result, the amount of heat transmitted to the leaf spring 11 can be reduced and the temperature rise of the leaf spring 11 is also reduced. can do. Further, the lead-in wire 13 may be a flat braided wire or a stranded wire. When the lead-in wire 13 is formed of a flat braided wire, a large cross-sectional area can be obtained without increasing the thickness of the lead-in wire 13 itself, so that the high-frequency current can be efficiently generated without making the entire power lead-in device 1 bulky. The power supply line 3 can be well fed.

  According to the power retractor 1 of the present embodiment configured as described above, since the retract paths 14A and 14B are arranged so as to have the overlapping portion 15, the density of the magnetic field lines does not decrease, and the transport vehicle 2 The voltage induced in the pickup coil 5 does not decrease. Therefore, the driving force of the transport vehicle 2 does not decrease at the retracting portion B, and the travel of the transport vehicle 2 can be accurately controlled.

(Second Embodiment)
Next, the power drawing-in apparatus 1 which concerns on 2nd Embodiment is demonstrated with reference to FIG.5 and FIG.6. The power draw-in device 1 of the present embodiment is different from the first embodiment in the shape of the leaf spring 21 and the ends of the feeder lines 3 are not arranged in steps but are opposed to each other. .

  The plate spring 21 has a protruding portion 21a that protrudes so that the power supply line direction side portions overlap each other toward the other plate spring 21. A lead-in wire 23 is connected to the tip of the protruding portion 21a by welding. Specifically, the right leaf spring 21 in FIGS. 5 and 6 has a protruding portion 21a whose upper surface extends to the left, and the left leaf spring 21 has a protruding portion 21a whose lower surface extends to the right. Have. Left and right drawing paths 24A and 24B are formed by the leaf spring 21, the protruding portion 21a and the drawing line 23, respectively, and the drawing paths 24A and 24B mainly have an overlapping portion 25 in orthographic view in the protruding portion 21a. It has a configuration.

  In the power pull-in device 1 of the present embodiment, the pull-in paths 24A and 24B have overlapping portions 25 as in the above-described embodiment, so that the density of magnetic lines of force due to high-frequency current does not decrease, and the pickup coil 5 of the transport vehicle 2 Therefore, the transport vehicle 2 can be accurately controlled for traveling. In addition, unlike the first embodiment in which the end portions of the power supply line 3 are different in level, the end portions of the power supply line 3 can be arranged to face each other, so that the spacing between the upper and lower pickup coils 5 can be reduced. Thus, the magnetic coupling between the pickup coil 5 and the feeder line 3 can be enhanced, and efficient power feeding is possible.

  Further, adjacent feeder lines 3 are arranged on a straight line, and the distribution of magnetic lines around the feeder line 3 is longer than the length of the feeder line 3 than when the ends of the feeder lines 3 are stepped. Since it becomes uniform along the direction, the fluctuation of the voltage induced in the pickup coil 5 when the transport vehicle 2 travels along the feeder 3 is minimized.

(Third embodiment)
Next, the power drawing-in apparatus 1 which concerns on 3rd Embodiment is demonstrated with reference to FIG. The power pull-in device 1 of this embodiment is substantially the same as that of the second embodiment, and only the shape of the leaf spring 31 is different.

  As for the leaf | plate spring 31, the protrusion part 31a is formed wider compared with 2nd Embodiment. Specifically, the width w1 of the protruding portion 31a is formed substantially the same as the width w2 orthogonal to the direction of the feeder line of the leaf spring 31 itself.

  In the present embodiment, similar to the above-described embodiments, the pull-in paths 34A and 34B have the overlapping portion 35 in the orthographic view, so the density of the magnetic lines of force does not decrease, and the transport vehicle 2 can be accurately travel controlled. . Moreover, since the area of the protrusion part 31a is large, the thermal radiation from this protrusion part 31a is further accelerated | stimulated, and the temperature rise of the electric power drawing-in apparatus 1 can be suppressed.

  In the power pull-in device 1 shown in the above-described various embodiments, the density of the magnetic field lines does not decrease in the pull-in path of the power supply line 3 to the power source 4, so the voltage induced in the pickup coil 5 of the transport vehicle 2 decreases. Therefore, the traveling of the transport vehicle 2 can be accurately controlled. Note that the pickup coil 5 in the above embodiment is configured as a pair that sandwiches either the forward path or the return path of the feeder line 3 laid in a loop shape from above and below, but the pickup coils are parallel to each other. It may have a structure that sandwiches both the forward and return feed lines 3. Moreover, in the said embodiment, although the leaf | plate spring 11 was shown as a conductor, it is not restricted to a leaf | plate spring structure, Arbitrary forms can be employ | adopted if it is the structure electrically connected with the copper wire 6. FIG. Furthermore, in the power supply system of the present invention, in the power feeding system in which the traveling route of the transport vehicle is configured by a plurality of loop power supply lines and the transport vehicle travels across the plurality of power supply lines, the loop power supply lines are It can also be installed in adjacent parts.

The schematic block diagram of the electric power feeding system provided with the electric power drawing-in apparatus which concerns on the 1st Embodiment of this invention. The top view of the same electric power drawing-in apparatus. The perspective view of the same electric power drawing-in apparatus. The perspective view which shows the clamping aspect to the electric power feeding line of the leaf | plate spring in the same electric power drawing-in apparatus. The perspective view of the electric power drawing-in apparatus which concerns on the 2nd Embodiment of this invention. The top view of the same electric power drawing-in apparatus. The perspective view of the electric power drawing-in apparatus which concerns on the 3rd Embodiment of this invention. The schematic block diagram of the electric power feeding system provided with the conventional electric power drawing-in apparatus. The perspective view of the conventional electric power drawing-in apparatus.

Explanation of symbols

1 Power draw-in device 3 Feed line 4 Power supply device (power supply)
6 Copper wire (end)
11 Leaf spring (conductor)
13 Lead-in wires 14A and 14B Lead-in route 15 Overlapping portion 21 Leaf spring (conductor)
21a Protruding portion 23 Lead-in wires 24A and 24B Pull-in path 25 Overlapping portion 31 Leaf spring (conductor)
31a Protruding portion 33 Pull-in lines 34A and 34B Pull-in path 35 Overlapping portion w1 Protruding portion width w2 Leaf spring width

Claims (5)

A power lead-in device that is arranged in a connecting portion between adjacent power supply lines used in a non-contact power supply apparatus and supplies power from a power source to each power supply line,
Comprising at least two conductors electrically connected to each end of the adjacent feeder lines, and a lead-in line to a power source connected to these conductors,
The power drawing device, wherein the drawing path formed by the conductor and the drawing line is arranged so as to have an overlapping portion along the feeding line direction between the neighboring feeding lines.   The two conductors are protruded so that respective power supply line direction side portions overlap each other toward the other conductor, and the lead-in wire is connected to the tip of the protruding portion. The power pull-in device according to 1.   The power drawing device according to claim 2, wherein the protruding portion protrudes with a width substantially the same as a width orthogonal to a feeder line direction of the conductor.   The power lead-in device according to any one of claims 1 to 3, wherein the lead-in wire is a flat braided wire.   The power lead-in device according to any one of claims 1 to 3, wherein the lead-in wire is a litz wire.

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