JP2009241645A - Non-contact type power supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact type power supply system capable of reducing the maintenance process even when the environment is changed. <P>SOLUTION: The non-contact type power supply system comprises: rails fixingly installed on a skeleton side; a moving body to be guided and supported by the rails in a traveling manner; power supply cables arranged along the rails with the high frequency current running therein; and a power receiving block which is moved together with the moving body to drive the moving body by the current delivered from the power supply cables. The power receiving block has a power receiving piece arranged on the power supply cables in a non-contact state, and the current is delivered between the power supply cables and the power receiving block to generate the induction current in the power receiving piece by the electromagnetic induction by the magnetic field generated in the power supply cables. A first insertion part 81A for a first power supply cable and a second insertion part 81A for a second power supply cable are passed through a joiner for connecting the power supply cables. The diameter of the first insertion part 81A on one side is reduced toward the second insertion part 81A on the other side, and the diameter of the second insertion part 81A on one side is reduced toward the first insertion part 81A on the other side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a non-contact power feeding system that supplies power for a trolley system that travels a moving body using a current delivered by a non-contact power feeding system as a drive source.

  Conventionally, in a trolley system such as an overhead crane or a monorail, a power feeding system is used to supply electricity as a driving source to a moving body such as a self-propelled hoist or a carriage. The power supply system is designed to pass current between a power supply duct (power supply line) routed along the rail that runs the hoist and a current collector (brush) provided on the hoist side. The moving body is driven to travel with electric current. At this time, in general, a contact-type power supply system in which a brush always contacts a power supply line is used as the power supply system (see, for example, Patent Document 1).

  However, in the contact-type power supply system, the brush moves while always in contact with the power supply line, so that the brush and the power supply line are worn and need to be replaced regularly, resulting in high running costs.

For this reason, in recent years, a high-frequency current is caused to flow through a power supply line, and an induced current is generated in an electron receiving device that is brought close to the power supply line in a non-contact state by electromagnetic induction caused by a magnetic field generated around the power supply line. A contactless power supply system has been proposed (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 9-255279 Japanese Patent Laid-Open No. 11-4502

  However, when the place where the above-mentioned contactless power supply system is installed is a factory or the like, the range of the indoor temperature becomes large, and it is avoided that the power supply line expands or conversely shrinks. Absent. When the power supply line expands and contracts, the power supply line is disconnected, and there is a problem that maintenance is required.

  Then, this invention is proposed in view of the situation mentioned above, and it aims at providing the non-contact-type electric power feeding system which can reduce a maintenance process also by the environmental change of a non-contact-type electric power feeding system.

  The present invention includes a rail fixedly installed on the housing side, a movable body that is guided and supported so as to be able to travel on the rail, a feed line that is routed along the rail and that allows high-frequency current to flow, and the movable body And a power receiving block that drives the moving body with a current that is transferred from the power supply line, the power receiving block having electrons received in a non-contact state with the power supply line, and the power supply block. In the non-contact type power feeding system, current passing between an electric wire and the power receiving block is performed by generating an induced current in the received electrons by electromagnetic induction by a magnetic field generated in the power feeding line.

  In such a non-contact power supply system, the first power supply line has a connection mechanism between the first power supply line and the second power supply line, and the first insertion portion into which the first power supply line of the connection mechanism is inserted and the second power supply line. It is set as the structure which the 2nd insertion part of an electric wire penetrates, The diameter becomes small so that the said 1st insertion part goes to a 2nd insertion part, and the said 2nd insertion part becomes small the diameter, so that it goes to a 1st insertion part. It is characterized by.

  The contactless power supply system includes a connection mechanism between the first power supply line and the second power supply line, and the first connection portion of the first power supply line and the second power supply line of the second power supply line are connected. It is characterized in that the distance between the two connecting portions is variable.

  According to the present invention, the distance between the first connection portion of the first feed line and the second connection portion of the second feed line is variable, or the first insertion portion is the second insertion portion. Since the diameter of the second insertion portion is reduced toward the first insertion portion and the diameter of the second insertion portion is reduced toward the first insertion portion, the maintenance process can be performed even if the power supply line expands or contracts due to the environmental change of the non-contact type power supply system. Can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 6 show an embodiment of a trolley system using a contactless power feeding system according to the present invention, FIG. 1 is a schematic configuration diagram showing the entire trolley system, and FIG. 2 is taken along line II-II in FIG. FIG. 3 is an enlarged perspective view showing a connecting end portion of the feeder line, and FIG. 4 is an enlarged perspective view of a connecting tool for connecting the feeder line.

  As shown in FIG. 1, the trolley system 1 of the present embodiment includes a movable body 3 that can move along a movable body rail (not shown), and a non-contact power feeding system 4 that supplies electric power to the movable body 3. It is equipped with.

  The moving body rail for guiding the moving body 3 is fixedly installed on a housing such as a factory or a warehouse not shown. Then, the moving body 3 performs a predetermined work by driving the motor 31 with the electric power supplied from the non-contact power supply system 4. The moving body 3 performs, for example, traveling along the moving body rail, operation of a chain block (not shown), driving of a conveyance belt, and the like.

  The non-contact type power feeding system 4 includes a rail 2, a plurality of power feeding lines 6 that are routed along the rail 2 and a high frequency current flows from the power source 5, and a current that is driven by the moving body 3 and delivered from the power feeding line 6. And a power receiving block 7 for supplying the power to the moving body 3. The non-contact power supply system 4 can receive power from the power supply line 6 without contacting the power supply line 6 by electromagnetic induction.

  The power receiving block 7 is fixed to the moving body 3 and pulled by the moving body 3. Accordingly, the power reception block 7 moves along the rail 2 by being pulled by the moving body 3.

  The power reception block 7 has a core 71 as an electron receiver that is arranged in a non-contact state on the power supply line 6. As shown in FIG. 2, the core 71 has an outer shape 71 s having a substantially U-shaped cross section so as to straddle the feeder line 6 from the side. A pair of coils 71p and 71m are disposed opposite to each other inside the outer casing 71s so as to be located on both sides of the feeder line 6. As a result, the core 71 constitutes an electromagnetic pickup. The coils 71p and 71m are preferably as close as possible to the feeder line 6. Then, when a high frequency current is supplied from the power source 5 to the power supply line 6, a phenomenon of generating a magnetic field MF corresponding to the frequency of the supplied high frequency current occurs around the power supply line 6. As a result, an induced current is generated in the coils 71p and 71m.

  As shown in FIG. 1, the current generated in the coils 71 p and 71 m is stabilized by the resonance circuit 72 built in the power receiving block 7, and is supplied to the inverter 32 provided in the moving body 3 via the constant voltage circuit 73. Supplied to the motor 31.

  As shown in FIG. 3, the feeder 6 is formed as a long body having a predetermined length by a conductor portion 61 and an insulating portion 62 in which the conductor portion 61 is embedded in the center portion. The feeder 6 is used by connecting a plurality of feeder lines 6 according to the length of wiring.

  The conductor portion 61 has a double tube structure in which channel-like small-diameter pipes 61a and large-diameter pipes 61b are arranged substantially concentrically. The open portion 61c of the small diameter tube 61a and the open portion 61d of the large diameter tube 61b are disposed in the same direction. And the small diameter pipe | tube 61a and the large diameter pipe | tube 61b are mutually connected through the connection rib 61e on the opposite side to the open parts 61c and 61d.

  The insulating part 62 is made of a flexible synthetic resin or the like. By inserting the conductor portion 61 into the insulating portion 62 and extruding it, the feeder 6 having a predetermined length can be continuously formed.

  The insulating part 62 is generally formed in a substantially rectangular cross section. The insulating portion 62 is a narrow portion 62a in which the side (upper side in the figure) where the open portions 61c and 61d of the conductor portion 61 are disposed has a small width W1. Further, the insulating portion 62 is a wide portion 62b having a large width W2 on the opposite side (lower side in the drawing) of the open portions 61c and 61d, and a stepped portion 62c is formed between them. Here, the outer (upper side in the drawing) corner of the narrow portion 62a is chamfered. A pair of convex portions 62d projecting slightly in the surface direction of the wide portion 62b are provided in the outer corner (downward in the figure) of the wide portion 62b.

  As shown in FIG. 1, when the feeders 6 are routed along the rail 2, the feeder lines 6 are connected via connecting tools such as a joiner 8, an L-type joiner 8 </ b> A, and an end joiner 8 </ b> B.

  Here, a straight portion, a bent portion, a curved portion, and the like are formed on the rail 2 along a preset traveling route of the moving body 3, and accordingly, the feeding wire 6 and the straight portion of the rail 2 are linear. It becomes the routing portion 6A, the bent portion becomes the bent routing portion 6B, and the curved portion becomes the curved routing portion 6C. Therefore, the straight wiring portion 6A of the feeder 6 is connected by the joiner 8, and the bent wiring portion 6C is connected by the L-shaped joiner 8A. In addition, the forward wire 6m and the return wire 6n are routed in parallel with each other in the feeder 6 and the end portions of both the wires 6m and 6n are connected by an end joiner 8B.

  As shown in FIG. 2, the wire hanger 9 includes holding arms 91 and 92 that hold a pair of power supply wires 6 arranged in parallel, and a connecting portion 93 that connects the base ends of the holding arms 91 and 92. Are formed in a substantially U shape, and have holding portions 91H and 92H for holding the feeder 6 at the tip ends of the holding arms 91 and 92, respectively. The holding portions 91H and 92H are formed in an outer shape of the power supply line 6, that is, an inner shape substantially along the outer cross-sectional shape of the insulating portion 62, and the holding portions 91H and 92H hold the power supply line 6 closely without play. .

  Here, in FIG. 1, the lengths of the holding arms 91 and 92 are shown in an approximately equal state for convenience, but actually, as shown in FIG. 2, the holding arm 91 that holds the forward-side electric wire 6 m is It is formed longer than the holding arm 92 that holds the return-side electric wire 6n, so that the core 71 can pass through the return-side wire 6m with sufficient space.

[Specific description of Joiner 8]
In such a non-contact power supply system, the joiner 8 is configured as shown in FIGS.

  The joiner 8 functions as a connection mechanism between the feed lines 6 (first feed line and second feed line). As shown in FIG. 4, the joiner 8 is inserted through a first insertion portion into which the first feeder 6 is inserted from the back in the drawing and a second insertion portion into which the second feeder 6 is inserted from the front in the drawing. A conducting wire insertion portion 8A having an insertion hole 81A is provided. The conducting wire insertion portion 8 </ b> A is connected to a wire hanger 9 that supports the first feeding line 6 and the second feeding line 6. The electric wire hanger 9 includes a joiner support portion 9a that supports the conductor insertion portion 8A, a joiner fixing portion 9b to the rail 2, and a joiner fixing hole 9c to be screwed to the rail 2.

  In addition, in this example, the joiner 8 integrated with the electric wire hanger 9 was shown, However, If it is a structure as shown in below-mentioned FIG.

  Such a joiner 8 has an internal structure as shown in FIG. That is, the diameter of the first insertion portion (the range indicated by A in the drawing) at one end of the insertion hole 81A is reduced toward the second insertion portion at the other end, and conversely, the first insertion portion at the other end of the insertion hole 81A. The two insertion portions have a shape in which the diameter is reduced toward the first insertion portion at one end. When the first feeder 6 with the end portion of the inner conductor 8Aa having the insulating portion 62 exposed and the conductor portion 61 exposed is inserted, the insulating portion 62 is pressed in the inner diameter direction. The first feeding line 6 is fixed to. Then, in a state where the first feeder 6 is held by the conductor insertion portion 8A, the conductor portion 61 is brought into contact with the internal conductor 8Aa, thereby maintaining the conduction between the feeders 6.

  In the state where the first feeder 6 is inserted into the conductor insertion portion 8A, for example, when the surrounding environment becomes high temperature, the diameter of the first feeder 6 shown by a solid line in FIG. 6 is reduced as shown by a dotted line in FIG. A phenomenon of extending in the length direction occurs. At this time, the first feeder 6 extends in the inner direction of the inner conductor 8Aa inside the conductor insertion portion 8A, but the inner conductor 8Aa is made of a deformable conductor. It is possible to extend in the internal direction of 8Aa. When the inner conductor 8Aa extends in the inner direction, the inner diameter of the insertion hole 81A becomes smaller toward the other end, and therefore the conduction between the inner conductor 8Aa and the conductor portion 61 is always established.

  Therefore, according to the non-contact power supply system including such a joiner 8, the diameter of the first insertion portion is reduced toward the second insertion portion and the second insertion portion is directed toward the first insertion portion. Since the diameter is reduced, the maintenance process can be reduced even if the power supply line 6 expands and contracts due to environmental changes in the non-contact power supply system.

  In addition, when the surrounding environment of the non-contact type power supply system returns from the high temperature state to the normal state, the power supply line 6 returns to the original state, and the power supply line 6 contracts in the return direction in the conductor insertion portion 8A. It will be. At this time, the internal conductor 8 </ b> Aa returns to the original state so as to come into contact with the conductor portion 61, so that the energization between the feeder lines 6 can be maintained even at a normal temperature.

  Further, as another configuration of the joiner 8, even when the inside of the conductor insertion portion 8A does not adopt the configuration as shown in FIG. 6, the extension and contraction of the feeder 6 occurs due to the configuration as shown in FIGS. Even in this case, the energization between the feeder lines 6 can be maintained.

  7A is a perspective view, and FIG. 7B is a cross-sectional view. The conductor insertion portion 8B of the joiner 8 is slidably fitted to the wire hanger 9. As shown in FIG. The electric wire hanger 9 includes a joiner holding portion 9d that holds the conducting wire insertion portion 8B in a slidable manner, a joiner fixing hole 9c, and a joiner fixing portion 9b.

  As shown in FIG. 8, the joiner holding portion 9d slides the conductor insertion portion 8B in the same direction as the direction A (see also FIG. 7A) in which the feeder 6 is inserted into the conductor insertion portion 8B. Let That is, the joiner 8 as a connection mechanism between the first power supply line 6 and the second power supply line 6 includes the first connection part 8_1 into which the first power supply line 6A is inserted and the second connection into which the second power supply line 6B is inserted. The distance from the portion 8_2 is variable.

  In addition, a conductive plate 82 is provided at the bottom of the joiner holding portion 9d so as to be in sliding contact with the internal conductor 8Ba exposed from the lower portion of the external shield 8Bb. As shown in a top view in FIG. 9, the conductive plate 82 is provided in a movable range in which the first connecting portion 8_1 and the second connecting portion 8_2 are slid by the joiner holding portion 9d. Such an inner conductor 8Ba and the conductive plate 82 are in contact with each other with a predetermined contact pressure while the conductor insertion portion 8B slides along the joiner holding portion 9d.

  In such a joiner 8, for example, when the surrounding environment becomes high temperature, a phenomenon occurs in which the first power supply line 6A and the second power supply line 6B are extended. At this time, since the first connecting portion 8_1 and the second connecting portion 8_2 are slidable, the first feeding line 6A and the second feeding line 6B extend in the length direction. Only the first connection portion 8_1 and the second connection portion 8_2 can be slid. When the first power supply line 6A and the second power supply line 6B extend in the length direction, the inner conductor 8Aa and the conductive plate are slid in a state where the contact between the respective internal conductors 8Ba and the conductive plate 82 is maintained. The continuity with 82 is always taken.

  Therefore, according to the non-contact power supply system including such a joiner 8, the interval between the first connection portion 8_1 and the second connection portion 8_2 constituting the joiner 8 is variable. Even if the power supply line 6 expands and contracts due to environmental changes in the non-contact power supply system, the maintenance process can be reduced.

  In addition, when the surrounding environment of a non-contact-type electric power feeding system returns to normal from a high temperature state, the electric power feeding wire 6 will return to an original state, and the electric power feeding wire 6 will shrink in the return direction. At this time, the first connection portion 8_1 and the second connection portion 8_2 are slid in a state where the respective inner conductors 8Ba are in contact with the conduction plate 82 and returned to the original positions, so that the feeder 6 Mutual energization can be maintained.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

1 is a schematic configuration diagram showing an entire trolley system according to an embodiment of the present invention. The expanded sectional view along the II-II line in FIG. The expansion perspective view which shows the connection end part of the feeder line concerning embodiment of this invention. The expansion perspective view of the other joiner which connects the electric power feeding line concerning the embodiment of the present invention. FIG. 5 is an internal cross-sectional view of the joiner shown in FIG. 4. Sectional drawing which shows the state change of the Joiner shown in FIG. 5 when the surrounding environment becomes high temperature. The expansion perspective view of the other joiner which connects the electric power feeding line concerning the embodiment of the present invention. Sectional drawing which shows a motion of the other joiner shown in FIG. The top view of the other joiner shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trolley system 2 Rail 3 Mobile body 4 Non-contact-type electric power feeding system 5 Power supply 6 Feeding line 7 Power receiving block 8 Joiner 8A Conductor insertion part 8Aa Internal conductor 8B Conductor insertion part 8Ba Internal conductor 8Bb External shield 9 Electric wire hanger 9a Joiner support part 9b Joiner fixing part 9c Joiner fixing hole 9d Joiner holding part 31 Motor 32 Inverter 61 Conductor part 62 Bottom face 62 Insulating part 71 Core 72 Resonant circuit 73 Constant voltage circuit 81 Connection recess 82 Conducting plate 91 Holding arm 93 Connecting part

Claims (3)

A rail fixedly installed on the housing side,
A movable body guided and supported by the rail so as to be able to travel;
A feeder line routed along the rail and through which a high-frequency current flows;
A power receiving block that moves with the moving body and drives the moving body with a current delivered from the power supply line, and
The power receiving block includes electrons received in a non-contact state with the power supply line, and current reception between the power supply line and the power receiving block is performed by electromagnetic induction by a magnetic field generated in the power supply line. A non-contact power feeding system that generates an induced current in electrons,
A structure having a connection mechanism between the first power supply line and the second power supply line, through which the first insertion part into which the first power supply line is inserted and the second insertion part of the second power supply line are inserted. And the diameter of the first insertion portion decreases toward the second insertion portion, and the diameter of the second insertion portion decreases toward the first insertion portion. Power supply system. A rail fixedly installed on the housing side,
A movable body guided and supported by the rail so as to be able to travel;
A feeder line routed along the rail and through which a high-frequency current flows;
A power receiving block that moves with the moving body and drives the moving body with a current delivered from the power supply line, and
The power receiving block includes electrons received in a non-contact state with the power supply line, and current reception between the power supply line and the power receiving block is performed by electromagnetic induction by a magnetic field generated in the power supply line. A non-contact power feeding system that generates an induced current in electrons,
A connection mechanism between the first power supply line and the second power supply line is provided, and the interval between the first connection part of the first power supply line and the second connection part of the second power supply line is variable. Non-contact power supply system characterized by having a structure.   The contactless power supply system according to claim 1, wherein the connection line is made of a material that expands by heat.

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