JP5834180B2 - Power line retractor - Google Patents

Description

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

  For example, a non-contact power supply device 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 supply apparatus will be described with reference to FIG.

  The non-contact power supply device 20 includes a power supply line 24 laid in a loop along the travel route of the transport vehicle 22 and a power supply device 21 that supplies a high-frequency current to the power supply line 24 via a lead-in line 25. A plurality of feeders 24 are connected and used by a connecting device 26 according to the length and shape of the travel route. The transport vehicle 22 has a pair of pickup coils 23 that receive power with the power supply line 24 sandwiched from above and below. An induction current is generated in the pickup coil 23 by a high-frequency current flowing through the power supply line 24, and the induction current is used as a drive power source. Travel in the direction of arrow A.

  As shown in FIG. 7, the non-contact power feeding device 20 picks up a magnetic flux generated by a high-frequency current flowing through a power supply line 24 installed in a ceiling by a pickup coil 23 that is a power receiving core, and a constant voltage power source 22a. It is converted into electric power through an inverter and drives the motor of the transport vehicle.

  Furthermore, a power pulling device is also disclosed in which a voltage induced in a pickup coil is not reduced in a pulling path in a pulling device for supplying power to a power source in a non-contact power feeding device (see, for example, Patent Document 1).

JP 2010-42690 A

  However, as shown in FIG. 6, in the non-contact power supply device 20 having a loop-shaped power supply path, a connection portion 27 between the power supply line 24 and the power supply device 21 wired in pairs and the connection portion 27 are adjacent to each other. When the pickup coil 23 passes through the folded portion 28 of the feeder line 24 that is wired as a pair, the connecting portion 27 and the folded portion 28 are separated from each other by a large distance. Greatly decreases, and the output voltage from the pickup coil 23 decreases.

  In addition, when the connection part between the power supply line and the power supply device of different power supply paths is adjacent to each other, and the pickup coil passes through this adjacent connection part, the density of the magnetic field lines due to the current of the power supply line is greatly reduced, There is a problem that the output voltage of the power supply decreases. In this case, the driving power of the transport vehicle also decreases at the connecting portion, and accurate traveling control cannot be performed.

  The present invention has been made in view of the above-described conventional problems, and includes a connecting portion between a power supply line wired as a pair and a power supply device, and a power feeding line wired as a pair adjacent to the connecting portion. An object of the present invention is to provide a power line lead-in device that can suppress a decrease in output voltage from a pickup coil when the pickup coil passes through.

  Further, there is provided a power line lead-in device capable of suppressing a decrease in output voltage from a pickup coil when a connection portion between a power supply line and a power supply device of different power supply paths is adjacent and the pickup coil passes through this connection portion. Also aimed at.

In order to achieve the above object, the present invention is used in a non-contact power feeding device, and is connected between a feeder line and a connecting portion of a power supply device that are wired as a pair, and between a feeder line that is wired as a pair adjacent to the connecting portion. is disposed over, at power line retraction device for supplying power from a power source to the feed line, sandwiching the four ends of the feeder line the being paired next line respectively, substantially U-connected fed-wire and the electrically respectively Four connecting metal plates, a lead-in wire to the power supply device connected to the connecting metal plate, the connecting metal plate and the lead-in wire are installed , and a vertical section with respect to the wiring direction of the feeder line is substantially L And the connection sheet metal is offset from each other in the same projecting direction toward the connection sheet metal disposed facing the direction along the surface of the connection sheet metal . each other by A projecting portion projecting so as to be stepped, the lead-in wire is connected to the projecting portion, and the connecting sheet metal and the lead-in wire are connected to the installation member along a length direction of the feeder line And a rib for positioning and insulating the connecting sheet metal.

  In this power line lead-in device, it is preferable that the lead-in path formed by the connection sheet metal and the lead-in line is arranged so as to have an overlapping portion along the length direction between adjacent power feed lines.

  In this power line lead-in device, it is preferable that the power supply lines wired in pairs adjacent to the connection portion are connected to a power supply device of a power supply path different from the power supply path having the connection portion.

  In this power line lead-in device, it is preferable that the power supply line wired in pairs adjacent to the connection part is a power supply line of a folded part of a power supply path having the connection part.

  In this power line lead-in device, it is preferable that the power supply device further includes a cover portion that covers the connection metal plate and the lead wire, and the cover portion is installed on the concave portion after connecting a power supply line to the connection metal plate.

  In this power line lead-in device, the connection sheet metal is provided on a curved portion for sandwiching the power supply line, and on a substantially U-shaped bottom side of the connection sheet metal with respect to the curved portion, and the power supply line is disposed on the bottom portion. And a rib for preventing excessive insertion in the direction.

  In this power line lead-in device, it is preferable that the connection sheet metal has a rib that prevents the power supply line from being excessively inserted in the power supply line insertion direction of the connection sheet metal.

  The power line drawing device further includes a magnetic shield that is disposed around at least the connection sheet metal and shields magnetism due to leakage magnetic flux from the pickup unit inductively coupled to the power supply line from reaching the connection sheet metal. Is preferred.

  In this power line drawing-in apparatus, it is preferable that a plurality of ribs are formed on the outer surface of the concave portion of the installation member, and a plurality of groove portions that are fitted to the plurality of ribs are formed in the cover portion.

  According to the power line lead-in device according to the present invention, between the connection of the power supply line wired as a pair and the power supply device, between the folded portion of the power supply line wired as a pair adjacent to the connection part, It is possible to connect the power supply line and the power supply apparatus by eliminating a section where the magnetic flux received by the pickup coil is interrupted at a location where the connecting portion between the power supply line and the power supply apparatus that are wired in pairs is adjacent. For this reason, it is possible to prevent a drop in the voltage output of the pickup coil.

(A) And (b) is a schematic block diagram of the non-contact electric power feeder provided with the power line drawing-in apparatus which concerns on embodiment of this invention. (A) Perspective view of the retracting device, (b) Top view of the retracting device. (A) A perspective view of a connection sheet metal used in the retracting device, (b) a side view of the connection sheet metal sandwiching a power supply line in the retracting apparatus, (c) a perspective view of another connection sheet metal used in the retracting device. . The perspective view of the same drawing-in apparatus which has a cover part. (A) The schematic side view of the power line drawing-in apparatus which concerns on the 1st modification of embodiment, (b) The schematic top view of the drawing-in apparatus, (c) The schematic front view of the drawing-in apparatus. The schematic block diagram of the conventional non-contact electric power feeder. The perspective view of the conventional non-contact electric power feeder.

A power line lead-in device according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1A and 1B, the non-contact power feeding device 1 includes a power line drawing device 2 (hereinafter referred to as a drawing device), and a feeding line 3 laid in a loop along the feeding path. The power supply device 4, the transport vehicle 5, the pickup coil 6, and the connection device 7 are provided. This non-contact power feeding device 1 is used in, for example, a clean room where it is necessary to suppress the generation of dust in the air.

  The lead-in device 2 is a member used for connecting the power supply line 3 and the power supply device 4 via the lead-in line 8. For example, as shown in FIG. And the connecting portion of the power supply device 4 and the connecting portion of the power supply device 4 are disposed so as to extend over the folded portion of the feeder line 3 that is adjacent to the connecting portion and wired as a pair. Moreover, the drawing-in apparatus 2 can also be arrange | positioned in the location where the connection part of the electric power feeding line 3 and the power supply device 4 which are wired in a pair by a different electric power feeding path is adjacent, as shown in FIG.1 (b).

  The feeder 3 includes, for example, a cylindrical inner tube portion, a cylindrical outer tube portion disposed 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. The power supply lines 3 are wired in pairs according to the length and shape of the power supply path, and a plurality of power supply lines 3 are connected by the connecting device 7 and used.

  The power supply device 4 is connected to a commercial power supply, and generates a magnetic flux around the power supply line 3 by supplying an alternating high-frequency current to the power supply line 3. The transport vehicle 5 has a pickup coil 6 arranged close to the power supply line 3, and the pickup coil 6 picks up when crossing the magnetic field lines of the magnetic field generated around the power supply line 3 by the high-frequency current flowing through the power supply line 3. An induced current is generated in the coil 6. In the non-contact power feeding device 1, the transport vehicle 5 is caused to travel in the direction of arrow A using the voltage received by the pickup coil 6 as driving power.

  The pickup coil 6 has a core having a substantially C-shaped vertical cross section surrounding the feeder 3 and a coil formed by winding a winding wire around the core. In the core, an opening groove through which at least the power supply line 3 can pass in the radial direction is provided along the axial direction of the power supply line 3, and at least one of the inner peripheral surface and the outer peripheral surface is configured by a curved surface.

  The connection device 7 is for electrically connecting the opposing ends of the power supply line 3 used in the non-contact power supply device 1. A plurality of feeders 3 are connected by a connecting device 7 and are laid in a loop so as to follow the traveling route of the transport vehicle. With this configuration, in the contactless power supply device 1, the power supply wires 3 are designed in a limited space such as a clean room by electrically connecting the opposing ends of the power supply wires 3 using a plurality of connection devices 7. Can be arranged to change.

  Next, the configuration of the retracting device 2 according to the present embodiment will be described. As shown in FIG. 2A, the retracting device 2 includes a retracting wire 8, a connection sheet metal 9, and an installation member 10.

  The lead-in wire 8 is an electric wire for electrically connecting the power supply device 4 and the connection sheet metal 9, and is, for example, a litz wire obtained by collecting and twisting a plurality of insulated thin conductor wires. Thereby, when the high frequency current flows, the heat generation amount of the lead-in wire 8 itself is small, and the temperature rise of the lead-in wire 8 can be suppressed.

  The connecting sheet metal 9 is substantially U-shaped, and prevents the bending portion for sandwiching the exposed copper wire 3a of the feeder 3 and the feeder 3 from being excessively inserted toward the bottom of the substantially U-shape. It has a rib 9a. The connecting sheet metal 9 has a protruding portion 9 b whose side portion protrudes toward the other adjacent feeder 3 so as to be stepped. The protruding portion 9 b is connected to the lead-in wire 8, and power from the power supply device 4 is supplied to the power supply line 3 through the connection sheet metal 9.

  The installation member 10 has a substantially L-shaped vertical cross section, and has four recesses 10 a for installing the connection sheet metal 9 and the lead-in wire 8 along the wiring direction of the feeder 3. Further, as shown in FIG. 2B, the installation member 10 is formed with a plurality of ribs 11 for positioning the connection sheet metal 9 and insulating between the adjacent connection sheet metals 9. .

  As shown in FIGS. 2 (a) and 2 (b), the lead-in wire 8 and the connecting metal plate 9 are arranged in the recess 10a of the installation member 10 to form a lead-in route, and this lead-in route is connected to the adjacent feeder line. It arrange | positions so that it may have an overlap part along the length direction between three. Specifically, this overlapping portion is an overlapping portion of the protruding portions 9b of the connection sheet metal 9 disposed along the length direction of the adjacent feeders 3. The pickup coil 6 of the transport vehicle 5 feeds power to the transport vehicle 5 by going back and forth along one side (upper side in FIG. 2A) of the power supply line 3 arranged in a different step. With this configuration, there is no section in which the magnetic flux is interrupted when the pickup coil 6 passes through the retracting device 2, and a decrease in voltage output from the pickup coil 6 can be prevented.

  Moreover, the connection sheet metal 9 of the drawing-in device 2 according to the present embodiment prevents the feeder line 3 from being excessively inserted in the bottom direction of the substantially U shape, as shown in FIGS. 3 (a) and 3 (b). Ribs 9a to be used. With this configuration, excessive insertion of the feeder line 3 in the feeder line insertion direction is prevented, so that the feeder line 3 can be easily connected to an appropriate connection position of the connection sheet metal 9 and connected to the feeder line 3. The energized state with the sheet metal 9 is stabilized.

  Further, since the connecting sheet metal 9 has the rib 9c having the shape shown in FIG. 3C, the excessive insertion of the feeder line 3 in the direction of inserting the feeder line 3 can be prevented. It is possible to easily connect to a proper connection position, and to stabilize the energization state between the feeder 3 and the connection sheet metal 9.

  Moreover, the drawing-in apparatus 2 is provided with the cover part 12 which covers the sheet metal 9 for connection, and the drawing-in wire 8 as shown in FIG. A plurality of ribs 10 b are formed on the outer surface of the recess 10 a of the installation member 10, and a plurality of grooves 12 a that fit into the plurality of ribs 10 b are formed on the cover portion 12. Then, after connecting the feeder 3 to the connection sheet metal 9, the cover 12 can be mounted at the correct position of the installation member 10 by fitting the groove 12 a and the rib 10 b.

  As described above, according to the lead-in device 2 according to the present embodiment, the connecting portion between the feeder 3 and the power supply device 4 wired in pairs and the paired wirings are adjacent to the connecting portion. The power line lead-in device 2 is secured while securing a passage space for the pickup coil 6 between the folded portion of the power supply line 3 and the connection portion between the power supply device 3 and the power supply device 4 that are wired in pairs. Can be used to connect the power supply line 3 and the power supply device 4. In addition, the drawing path formed by the connection sheet metal 9 and the drawing line 8 is arranged so as to have an overlapping portion along the length direction between the adjacent feed lines 3, so that the magnetic flux received by the pickup coil 6 is received. There is no section to be interrupted, and a drop in voltage output from the pickup coil 6 can be prevented.

(Modification 1)
A first modification of the present embodiment will be described with reference to FIGS. 5 (a), (b), and (c). The retracting device 2 includes a magnetic shield 13 that is disposed at least around the connection sheet metal 9 and shields magnetism due to leakage magnetic flux from the pickup coil 6 that is inductively coupled to the feeder 3 from reaching the connection sheet metal 9. The magnetic shield 13 is made of, for example, a material obtained by mixing iron oxide with a rubber material, and is configured in a sheet shape and can be bent flexibly.

  For this reason, in the present first modification, the leakage magnetic flux generated in the pickup coil 6 can be absorbed by the magnetic shield 13 to shield the influence of magnetism on the connection sheet metal 9. Therefore, it is possible to prevent the eddy current from being generated in the connection sheet metal 9 and suppress the temperature rise of the connection sheet metal 9 to reduce the risk of ignition and smoke generation.

  The present invention is not limited to the configuration of the above-described embodiment, and various modifications are possible without departing from the spirit of the invention. For example, a combination of the modification and the embodiment is possible. It is also conceivable to fix the lead-in wire 8 to the installation member 10 using a binding string.

DESCRIPTION OF SYMBOLS 1 Non-contact electric power feeder 2 Power line drawing-in apparatus 3 Feeding line 4 Power supply device 5 Carrier 6 Pickup coil 7 Connection device 8 Lead-in wire 9 Connection sheet metal 9a, 9c Rib 9b Protruding part 10 Installation member 10a Recess 10b Rib 11 Rib 12 Cover part 12a Groove 13 Magnetic shield

Claims (9)

Used in a non-contact power supply device, arranged between a feeder line and a power supply device connected in pairs and between the power supply device connected in pairs adjacent to this connection portion, In the power line lead-in device for supplying
Sandwiching four ends of the feeder line the being paired next lines, respectively, and four connecting sheet metal substantially U-shaped connected fed-wire and the electrically respectively, the power supply connected to the connecting sheet metal A lead-in wire to the device, and the connection sheet metal and the lead-in wire are installed , and a vertical cross-section with respect to the wiring direction of the feeder line is provided with a substantially L-shaped installation member,
The connection sheet metal is protruded so as to be different from each other by being offset from each other with the same protruding direction toward the connection sheet metal disposed facing the direction along the surface of the connection sheet metal. The lead-in wire is connected to the protrusion,
The installation member is provided with a recess for installing the connection sheet metal and the lead-in line and a rib for positioning and insulation of the connection sheet metal along the length direction of the feeder line. The power line drawing-in apparatus characterized by the above-mentioned.   The power line drawing-in apparatus according to claim 1, wherein the drawing-in path formed by the connection sheet metal and the drawing-in line is arranged so as to have an overlapping portion along a length direction between adjacent feeding lines. .   3. The power line according to claim 1, wherein the power supply lines wired in pairs adjacent to the connection part are connected to a power supply device of a power supply path different from the power supply path having the connection part. Retraction device.   3. The power line lead-in device according to claim 1, wherein the power supply line that is paired and wired adjacent to the connection part is a power supply line of a folded part of a power supply path having the connection part. A cover portion for covering the connection sheet metal and the lead-in wire;
5. The power line lead-in device according to claim 1, wherein the cover portion is installed on the concave portion after a power supply line is connected to the connection sheet metal. 6. The connection sheet metal is
A curved portion for sandwiching the power supply line;
2. A rib provided on the bottom side of the substantially U-shape of the connecting sheet metal with respect to the curved portion, and preventing the power supply line from being excessively inserted in the bottom direction. The electric power line drawing-in apparatus as described in any one of thru | or 5 thru | or 5.   7. The connection sheet metal according to claim 1, wherein the connection sheet metal includes a rib that prevents the power supply line from being excessively inserted in a direction in which the connection sheet metal is inserted into the power supply line. 8. Power line retractor.   The magnetic shield according to claim 1, further comprising: a magnetic shield that is arranged around at least the connection sheet metal and shields magnetism due to leakage magnetic flux from a pickup unit that is inductively coupled to the power supply line from reaching the connection sheet metal. The power line lead-in device according to any one of claims 1 to 7. A plurality of ribs are formed on the outer surface of the recess of the installation member,
The power line drawing-in device according to claim 5, wherein the cover portion is formed with a plurality of grooves that fit into the plurality of ribs.

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