JPH1042402A - Power supply pickup device and moving body - Google Patents

Abstract

(57) [Summary] A mobile communication system in which a signal is superimposed on a power supply alternating current flowing through a power supply line wired on a rail,
The signal attenuation during traveling on a curve is minimized to improve communication reliability. SOLUTION: In order to supply power to a carrier traveling on a traveling rail, a power supply pickup device 15 supplies an alternating current to a power supply line 5 wired on the traveling rail, and takes in electric power by an electromagnetic induction action with the alternating current. It is provided on the carrier. The power supply pickup device 15 includes a ferrite core 16 having a substantially E-shaped cross section, and a shaft portion 16 of a protrusion 16a.
b, and a coil group C wound around b. The coil group C is composed of three types: a feeding coil 18, a receiving antenna coil 19, and a transmitting antenna coil 20, and is wound coaxially around the shaft 16b in this order from the inside. Each of the antenna coils 19 and 20 is for communication performed by superimposing a signal on an alternating current flowing through the feed line 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply pickup device provided on a moving body for taking in electric power from a power supply line wired on a rail on which the moving body travels by electromagnetic induction, and more particularly, to a power supply pickup device provided on the moving body. The present invention relates to a power supply pickup device and a moving body for a communication system that performs communication by superimposing a signal on an alternating current.

[0002]

2. Description of the Related Art Conventionally, a monorail-type transfer device (moving body) that travels along a rail erected on a ceiling and transfers a load between stations in a factory or warehouse.
Has been proposed. In addition, as a power supply method of this type of transfer device, a pickup coil is attached to a moving body in a state where the pickup coil is opposed to a power supply line wired on a rail in a non-contact manner,
2. Description of the Related Art There is known a power supply system that takes in power from an alternating current flowing through a power supply line as an induced electromotive force by this pickup coil (for example, Japanese Patent Application Laid-Open No. HEI 6-153305).

According to JP-A-6-153305,
As shown in FIG.
An alternating current flows through the two power supply lines 52 wired in a state supported by the moving object, and the moving body receives power from a pickup coil (pickup device) 53 provided in a non-contact state opposed to the two power supply lines 52. Is to be obtained. The pickup device 53 includes a core 54 having a substantially E-shaped cross section, and a core 54.
And a coil 55 wound around the projection 54a.

[0004] Conventionally, a mobile unit such as a carrier device is driven and controlled based on a command signal from a fixed station by communicating with a fixed station (master station) provided on the ground side. . Communication between a fixed station (master station) and a mobile unit (slave station) is usually performed via a trolley wire wired along rails, since radio communication may cause crosstalk. However, according to the trolley wire, the contact portion of the trolley wire with the current collecting brush is easily worn, and the wiring work for wiring the trolley wire is troublesome.

Therefore, the applicant of the present application has proposed to perform communication using a power supply line. That is, a signal for communication is superimposed on the alternating current flowing through the power supply line, and communication with a fixed station (master station) is performed via a pickup coil (antenna coil) for communication provided on the moving body.

As described above, in a communication system in which a signal of a predetermined frequency is superimposed on a power supply AC by using a power supply line,
Attenuation of the signal when transmitting and receiving the signal between the antenna coil and the feed line becomes a problem. Therefore, it is necessary to arrange the antenna coil as close as possible to the feed line so that the attenuation of the signal strength can be reduced as much as possible. That is, in order to minimize the attenuation of the signal strength, the antenna coil should be disposed almost at the center between the two power supply lines 52 where the magnetic flux density around the power supply line 52 is the highest, similarly to the power supply coil 55. preferable. As a configuration in which the antenna coil is mounted so as to satisfy this condition, for example, as shown in FIG. It is conceivable to dispose each of the trusted antenna coils 56a and 56b.

[0007]

As shown in FIG. 8, when the moving body 61 travels on a curve, the traveling wheels 6
2 is steered to follow the curve of the rail 51,
A steering portion 63 for supporting the traveling wheel 62 in a state capable of rotating relative to the main body 61a was provided at an upper portion of the main body 61a. Conventionally, the pickup device 53 is attached to the steering portion 63 so that the posture parallel to the power supply line 52 can be maintained even when traveling on a curve. That is, the pickup device 53 is mounted on the curved rail 5.
1 is disposed on the steering portion 63 so as to be able to maintain a posture parallel to the tangential direction of the first rotation shaft 63a so as to face the rotation shaft 63a.

However, if a configuration in which the antenna coils 56a and 56b are arranged on both sides of the feeding core 54 as shown in FIG. 7 is adopted, if the curvature of the curve is large, FIGS. As shown in FIG. 9, a situation occurs in which the antenna coils 56 a and 56 b are largely separated from the power supply line 52 when traveling on a curve. Since the sensitivity of the antenna coils 56a and 56b sharply decreases as the distance from the power supply line 52 increases, there is a problem that the signal strength is greatly reduced when traveling on a curve and communication reliability is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a mobile communication system for performing communication by superimposing a signal on a power supply alternating current flowing through a power supply line. It is an object of the present invention to provide a power feeding pickup device and a mobile body that can minimize attenuation of signal strength at the time of operation and can improve communication reliability.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the first aspect of the present invention, power is supplied from a power supply line wired to a rail to a moving body running on the rail by electromagnetic induction. A power supply pickup device comprising: a power supply coil; and a core body around which the power supply coil is wound, the power supply pickup device being used for communication for performing communication by superimposing a signal on an alternating current flowing through the power supply line. An antenna is disposed on the shaft of the core body.

According to a second aspect of the present invention, in the power supply pickup device according to the first aspect, the power supply coil and the communication antenna are coaxially wound around a shaft of the core body. I have.

According to a third aspect of the present invention, in the power supply pickup device according to the first or second aspect, the communication antenna is arranged such that the communication antenna is more than the power supply coil with respect to a shaft of the core body. It is wound at a position that can be approached to the power supply line.

According to a fourth aspect of the present invention, in the power supply pickup device according to any one of the first to third aspects, the communication antenna includes a transmission antenna and a reception antenna. The trust antenna is wound around a shaft portion of the core body at a position closer to the power supply line than the receiving antenna.

According to a fifth aspect of the present invention, the movable body is a movable body mounted on a rail on which a power supply line is wired, and may be any one of the first to fourth aspects. Is provided so as to have a predetermined positional relationship with respect to the power supply line.

According to a sixth aspect of the present invention, in the moving body according to the fifth aspect, the moving body is capable of rotating a steering portion capable of steering running wheels along the rail relative to the main body. The power supply pickup device,
The steering unit is provided so as to be integrally rotatable, and is disposed on the steering unit at a position where the displacement of the power feeding coil and the communication antenna from the power feeding line during the curve running of the moving body is minimized. ing.

(Operation) Therefore, according to the first aspect of the present invention, an alternating current for power supply flows through a power supply line wired on the rail on which the moving body travels, and the alternating current for transmitting a signal for communication. Are superimposed. The moving body obtains electric power by an electromotive force induced in a power feeding coil wound around the shaft of the core body, and performs communication via a power supply line by a communication antenna disposed on the shaft of the core body. . The power supply coil and the communication antenna are wound around the shaft so as to share the core body.
Therefore, when the moving body travels on a curve, it is possible to minimize the possibility that the communication antenna is disconnected from the power supply line.
Therefore, the attenuation of the signal level when communication is performed while traveling on a curve can be suppressed to a small level.

According to the second aspect of the present invention, since the feeding coil and the communication antenna are coaxially wound around the shaft of the core body, both of the two types of coils are curved. It is possible to dispose the core body at a portion where the magnetic flux density of the core body is high, with little disconnection from the power supply line during traveling.

According to the third aspect of the present invention, the communication antenna is disposed closer to the power supply line than the power supply coil. Therefore, even if the signal strength used for communication is relatively weak as compared with the power supply AC, the communication antenna superimposes the signal on the AC flowing through the power supply line or the signal superimposed on the AC. The attenuation of the signal strength at the time of extraction is suppressed relatively small.

According to the fourth aspect of the present invention, the transmitting antenna is disposed closer to the power supply line than the receiving antenna. Therefore, the attenuation of the signal level at the time of transmission processing for superimposing a signal on the alternating current flowing from the transmission antenna to the power supply line can be suppressed relatively small, and the reliability of communication is further improved.

According to the fifth aspect of the present invention, the moving body includes the power supply pickup device according to any one of the first to fourth aspects. The same operation as the invention according to any one of the first to fourth aspects is obtained.

According to the sixth aspect of the present invention, when traveling on a curve, the steering wheel rotates relative to the main body so that the traveling wheel is steered to follow the curve of the rail. Therefore, the power supply pickup device mounted on the steering unit changes its attitude along the curve of the power supply line so as to minimize the deviation of the power supply coil and the communication antenna from the power supply line. As a result, the deviation of the power supply coil and the communication antenna from the power supply line when traveling on a curve can be further reduced.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 3 shows the transport system 1 in the present embodiment. As shown in FIG. 1, a plurality of transport bodies 4 as moving bodies are provided so as to be able to travel in a suspended state on a traveling rail 3 as a rail provided on a ceiling 2. A power supply line 5 for supplying power to the carrier 4 is wired on the traveling rail 3, and the power supply line 5 is connected to a power supply device 6 installed on the ground side. Further, on the ground side, an operation control device (fixed station) 7 for instructing the carrier 4 to perform a predetermined transport operation is installed. The operation control device (fixed station) 7 includes a personal computer 7 a for communicating with the carrier 4. The transmitting antenna coil 8a and the receiving antenna coil 8b connected to the personal computer 7a are wound directly around the power supply line 5 extending toward the power supply device 6 around the outer periphery thereof.

The transport body 4 includes a pair of front and rear drive wheels 9 and driven wheels 10 as running wheels. The traveling rail 3 is extended so as to form a closed loop trajectory with a curve at a predetermined location, and each transport body 4 circulates on the trajectory of the traveling rail 3 based on a command signal from the operation control device 7. A predetermined transfer operation is performed between them.

As shown in FIG. 2, the carrier 4 includes a plurality of sets of guide wheels 11 as running wheels in addition to the wheels 9 and 10, and the guide wheels 11 sandwich the running rail 3. This restricts the movement (swaying) of the transport body 4 in the width direction. Each of the wheels 9 to 11 is supported by a steering unit 12 as a steering unit provided in a pair at the front and rear of the upper part of the main body 4a. The steering unit 12 has a bearing 13
Is provided so as to be relatively rotatable in a horizontal plane with respect to the main body 4a about the rotation shaft 12a via the shaft.

The power supply line 5 is supported on the rear surface (the right side surface in FIG. 2) of the traveling rail 3 so as to be fitted to the tip of a support member 14 fixed at predetermined intervals. As shown in FIGS. 2 and 3, the two power supply lines 5 (however, connected in a loop at the end side of the running rail 3) are connected to the running rail 3 at a predetermined interval in the vertical direction. Along and parallel to each other.

As shown in FIG.
A power supply pickup device 15 is disposed and supported above the power supply line 5 in a non-contact manner. The power supply pickup device 15 is mounted on the steering unit 12 in a posture capable of holding the power supply pickup device 15 parallel to the power supply line 5 (portion that is not a curve) so as to face the wheels 9 to 11 with the rotation shaft 12a interposed therebetween. A coil group C wound around a protrusion 16a of a ferrite core 16 having a substantially E-shaped cross section as a core body
Are arranged substantially at the center between the two power supply lines 5. A traveling motor 17 for rotating and driving the driving wheels 9 is provided on the steering section 12.

The power supply pickup device 15 is configured as shown in FIG. The ferrite core 16 having a substantially E-shaped cross section is formed in such a size that its longitudinal direction is perpendicular to the paper surface of FIG. The protrusion 16a protruding from the center of the ferrite core 16 is formed to have a T-shaped cross section by the shaft 16b and the restricting portion 16c formed at the tip thereof. The coil group C is wound around the shaft portion 16b in a state where the displacement in the axial direction is regulated by the regulating portion 16c.

The coil group C includes a power feeding coil 18, a receiving antenna coil 19 as a communication antenna and a receiving antenna, and a transmitting antenna coil 20 as a communication antenna and a receiving antenna.
Each is wound coaxially (layered winding) around the shaft portion 16b. That is, the power supply coil 18 is wound on the first layer, the reception antenna coil 19 is wound on the second layer, and the transmission antenna coil 20 is wound on the third layer from the inside with respect to the shaft portion 16b. . Therefore, the transmitting antenna coil 20 is arranged closest to the feed line 5.

FIG. 4 shows an electrical schematic configuration of the transport system 1 (however, only one transport body 4 is shown). As shown in the figure, both ends of a loop-shaped power supply line 5 are connected to a power supply device (high-frequency power supply) 6. The power supply device 6 supplies, for example, an AC of several tens of kHz to the power supply line 5. The operation control device 7 connects the transmitting antenna coil 8a and the receiving antenna coil 8b to the personal computer 7a via the modem 21. The modem 21 converts a signal from the personal computer 7a into an alternating current having a predetermined frequency and sends it to the transmitting antenna coil 8a, and filters only the frequency of the signal component superimposed from the alternating current induced in the receiving antenna coil 8b. And has a function of digitizing it and sending it to the personal computer 7a. The command signal transmitted to the carrier 4 is based on work instruction data input to an input device (not shown) provided at each station, operation information obtained by communication from the carrier 4, and the like. Created in

The carrier 4 is a receiving antenna coil 1
9 to which the antenna 9 and the transmitting antenna coil 20 are connected
The modem 22 is connected to a CPU 23 on a motherboard (not shown) built in the main body 4a.
The modem 22 has a function similar to that of the modem 21 on the operation control device 7 side. The modem 22 converts a digital signal into an alternating current having a predetermined frequency f and sends it to the transmitting antenna coil 20.
For the receiving antenna coil 19, only the frequency f of the signal component is extracted from the alternating current induced therein and digitized. The CPU 23 controls the driving of the carrier 4. Further, the carrier 4 includes a power supply circuit 24 connected to the power supply coil 18. The power supply circuit 24 rectifies the alternating current induced in the power feeding coil 18 and reduces the voltage if necessary.
A necessary drive voltage is supplied to the traveling motor 17, the CPU 23, and the like. The pair of front and rear power supply pickup devices 15 provided on the upper part of the carrier 4 are electrically connected in series. In addition, the frequency f of the signal sent from the operation control device 7 to the carrier 4 and the frequency f of the signal sent from the carrier 4 to the operation control device 7 may be the same or different.

Next, the operation of the power supply pickup device 15 configured as described above will be described. During operation of the transport system 1, alternating current of several tens of kHz is supplied from the power supply device 6 to the power supply line 5.
Supplied to The carrier 4 rectifies the induced AC induced in the power supply coil 18 by the power supply circuit 24 by an electromagnetic induction action with the AC flowing through the power supply line 5, and the traveling motor 1
7 and a drive voltage for the CPU 23.

Communication with the operation control device (fixed station) 7 is performed via the receiving antenna coil 19 and the transmitting antenna coil 20. Reception is performed by extracting only the frequency f (for example, several hundred MHz) of the signal component from the alternating current induced by the receiving antenna coil 19, digitizing this, and sending it to the CPU 23. On the other hand, for transmission, the modem 22 converts the digital signal from the CPU 23 into an alternating current having a predetermined frequency f (for example, several hundred MHz), and
It is done by sending to. Transmission antenna coil 20
, An AC having a predetermined frequency f is induced in the power supply line 5 by an electromagnetic induction action, and a signal having the predetermined frequency f is superimposed on an AC of several tens of kHz for power supply.

When the transport body 4 travels on a curve, the wheels 9 to 11 are steered so as to follow the curve of the traveling rail 3, and at this time, the front and rear steering portions 12 are moved to the main body 4a.
Relative to. At this time, the power supply pickup device 15 rotates integrally with the steering unit 12 and changes its posture so that its longitudinal direction coincides with the tangential direction of the power supply line 5. Therefore, even during such a curve running, each of the coils 18 to 20 does not significantly deviate from the power supply line 5. Therefore, even if communication is performed when the carrier 4 happens to be running on a curve, each antenna coil 1
Since the distance between the feed lines 9 and 20 and the feed line 5 is maintained at substantially the same level as when the vehicle is traveling straight, the attenuation of the signal strength due to the signal exchange between the antenna coils 19 and 20 and the feed line 5 in a non-contact manner is reduced. , Almost the same as when traveling straight.

In the coil group C coaxially wound around the shaft portion 16 b of the ferrite core 16, each of the antenna coils 19 and 20 wound outside the feeding coil 18.
Are in proximity to the feed line 5. Therefore, attenuation of the signal strength due to signal transmission and reception between the antenna coils 19 and 20 and the feeder line 5 can be further reduced.

Further, of the two antenna coils 19 and 20, the transmitting antenna coil 20 is wound on the outermost side, and the transmitting antenna coil 20 is in the state closest to the feeder line 5. Therefore, under the condition that the transmission is separated by the same non-contact distance as compared with the reception, the attenuation of the signal strength is relatively remarkable, but the transmission antenna coil 20 and the feeder 5
, The attenuation of the signal strength at the time of transmission can be suppressed particularly small. As a result, the carrier 4
, The reliability of the transmission from the communication is increased, and the reliability of the entire communication is further improved.

Further, since the power supply pickup device 15 provided on the steering section 12 is disposed in a posture facing each of the wheels 9 to 11 with the rotating shaft 12a interposed therebetween, each of the coils 18 during traveling on a curve. 20 to 20 are slightly shifted from the feeder line 5 in some places, but the average shift amount when the feeder pickup device 15 is viewed as a whole can be kept very small.

As described in detail above, according to the present embodiment,
The following effects can be obtained. (A) The pickup device 15 is configured by winding the communication antenna coils 19 and 20 around the ferrite core 16 common to the power feeding coil 18 and sharing the ferrite core 16 with the power feeding coil 18. Therefore, even when the vehicle is traveling on a curve, the amount of deviation of the antenna coils 19 and 20 from the power supply line 5 can be reduced, and the reliability of communication can be improved.

(B) The coil group C is wound coaxially around the projection 16a, and the antenna coils 19, 20 are wound outward so that the antenna coils 19, 20 are closer to the feeder line 5 than the feeder coil 18. . For this reason, attenuation of signal strength due to signal transmission and reception performed in a non-contact manner between the antenna coils 19 and 20 and the feeder line 6 can be minimized.

(C) The transmitting antenna coil 20 is wound on the outermost side so that the transmitting antenna coil 20 is closest to the feed line 5. As a result, the attenuation of the signal strength can be suppressed to be smaller in the transmission in which the attenuation of the signal strength is relatively remarkable as compared with the reception and the cause of the decrease in the reliability of the communication.

(D) Each of the antenna coils 19 and 20 is wound around the ferrite core 16 formed in a shape (substantially E-shaped in cross section) for easily collecting magnetic flux for the purpose of increasing the power supply efficiency. , 20 is increased as compared with the configuration shown in FIG. 7, and also from this point, the attenuation of the signal intensity can be suppressed to be small.

(E) Since each of the antenna coils 19 and 20 is arranged so as to be shielded inside the ferrite core 16 having a substantially E-shaped cross section, the leakage noise can be reduced and the influence of disturbance noise is suppressed. be able to.

(F) A power supply line in which the power supply pickup device 15 provided on the steering section 12 faces each of the wheels 9 to 11 with a rotation axis 12a which is a rotation axis of the steering section 12 interposed therebetween. 5 was placed in a position that could be held parallel to it. Therefore, each of the coils 18 to 2 when traveling on a curve
The average shift amount of 0 can be kept small.

(G) Due to the effects of (a) to (f), the reliability of communication in the transport system 1 can be improved. (H) Since one ferrite core 16 is shared,
When a communication system in which a signal is superimposed on a power supply alternating current flowing through the power supply line 5 is used, the communication antenna coil 1 is used.
It is not necessary to newly provide a core for winding 9, 20 and a supporting member thereof, which contributes to a reduction in the number of parts.

The present invention is not limited to the above embodiment, but may be embodied as follows without departing from the spirit of the invention. (1) As shown in FIG. 5, the feeding coil 18 and the antenna coils 19 and 20 are connected to the projection 16a of the ferrite core 16.
It is also possible to adopt a lap winding that is sequentially arranged in the axial direction with respect to the (shaft portion 16b). Also in this lap winding, it is preferable that the transmitting antenna coil 20 is arranged closer to the power supply line 5 than the receiving antenna coil 19 as shown in FIG. Also with this configuration, since the power supply coil 18 and the antenna coils 19 and 20 are wound around the common ferrite core 16, the reliability of communication when traveling on a curve can be improved. Also, the transmitting antenna coil 2
Since 0 is arranged closer to the feeder line 5 than the receiving antenna coil 19, attenuation of the signal strength in transmission can be further reduced, and the reliability of communication can be further improved.

(2) A configuration may be adopted in which one of the communication antenna and the feeding coil constituting the coil group C is wound around a portion other than the protrusion 16a of the ferrite core 16. Also with this configuration, the amount of deviation of the communication antenna from the power supply line when traveling on a curve can be reduced.

(3) The feeding coil and the communication antenna do not need to be completely coaxial and coaxial, and a configuration in which a part of the wound shaft is shared may be used. For example, a plurality of shaft portions may be provided on the core body, and a communication antenna may be wound around only some of the plurality of shaft portions around which the power feeding coil is wound. With this configuration also, the amount of deviation of the communication antenna from the power supply line when traveling on a curve can be reduced, and the reliability of communication can be increased.

(4) Only one communication antenna is used,
One communication antenna coil may be used for both transmission and reception. Alternatively, the communication antenna may be configured such that only the receiving antenna coil is wound around a common core (ferrite core) with the feeding coil. For example, such a configuration is possible in a communication method in which the carrier 4 only unilaterally receives a command signal from the operation control device (fixed station) 7.

(5) The antenna shape of the communication antenna (the transmitting antenna or the receiving antenna) is not limited to the coil shape. For example, it may be rod-shaped or plate-shaped. In this case, a rod-shaped or plate-shaped antenna may be wound around a shaft portion (for example, the protruding portion 16a) of the core body by a feeding coil.

(6) The shape of the core body is not limited to the above embodiment. For example, the section may be substantially C-shaped or plate-shaped. In the case of a single feeder line, by using a core body having a substantially C-shaped cross section, magnetic flux can be effectively collected in the core body,
The reliability of communication can be improved. Also, the material of the core body is not limited to ferrite, and other materials can be used as appropriate.

(7) The power supply pickup device of the present invention may be employed for a moving body that travels on a linearly extending traveling rail having no curve. (8) The present invention may be applied to a moving object traveling on a rail laid on the ground. For example, the present invention may be applied to an automatic guided vehicle traveling on rails laid on the ground, and communication may be performed by superimposing a signal on a power supply line for supplying power to the automatic guided vehicle. If the present invention is applied to this configuration, it is possible to increase the reliability of communication when the automatic guided vehicle travels on a curve.

(9) The moving object to which the present invention is applied is not limited to a transport device for transporting a load in a factory or a warehouse. The present invention can be widely applied to a moving body employing a power supply method of obtaining power from a power supply line wired on a rail by electromagnetic induction.

The invention which has been grasped from the above embodiment and is not described in the claims will be described below together with its effects. (A) In the invention of claim 2, the core body has a substantially E-shaped cross section.
The feeding coil and the communication antenna are wound around a central projection. According to this configuration, since the core body is formed in an E-shape, in a configuration in which the two power supply lines are wired in parallel with their current directions being opposite to each other, the magnetic flux can be effectively collected by the core body. Can,
Communication attenuation can be further reduced.

(B) In the invention according to claim 4, the power feeding coil and each antenna are coaxially wound around a shaft portion of the core body, and the power feeding coil is wound inside the shaft portion of the core body from the inside. , A receiving antenna, and a transmitting antenna. According to this configuration, power supply, reception, and transmission can all be efficiently performed.

(C) A transport system includes the movable body according to claim 5 or 6 as a transport body, and the transport body is mounted on a rail so as to be able to travel, and is provided between the movable body and the transport body. And a fixed station (operation control device) that communicates with the mobile station. According to this configuration, in a transport system including a fixed station for communicating with a transporter provided to be able to travel on a rail, the transporter includes a power supply provided in the mobile according to claim 5 or 6. Since the pickup coil for the present invention is provided, the same effect as the invention described in claim 5 or claim 6 can be obtained.

[0055]

Therefore, according to the first and fifth aspects of the present invention, the communication antenna is disposed on the shaft of the common core body with the power feeding coil, so that the moving body can be used when the vehicle travels on a curve. The deviation of the communication antenna from the feeder line can be kept small, the attenuation of the signal strength can be kept small, and the reliability of communication when traveling on a curve can be increased.

According to the second and fifth aspects of the present invention, since the power feeding coil and the communication antenna are coaxially wound around the shaft of the core body, both the power feeding coil and the communication antenna are provided. In addition, the deviation from the power supply line when traveling on a curve is suppressed to be small, and the power supply efficiency is impaired by the power supply coil because it is arranged at a relatively high magnetic flux density of the core body created by the alternating current flowing through the power supply line. Therefore, the reliability of communication by the communication antenna can be improved.

According to the third and fifth aspects of the present invention, the communication antenna is wound around the shaft of the core body at a position closer to the power supply line than the power supply coil. The attenuation of strength can be kept relatively small,
The reliability of communication can be improved.

According to the fourth and fifth aspects of the present invention, the transmitting antenna is wound around the shaft of the core body at a position closer to the power supply line than the receiving antenna, so that communication reliability is improved. Properties can be further enhanced.

According to the sixth aspect of the present invention, the power feeding pickup device is provided with a power feeding coil and a power feeding coil at the time of traveling on a curve, with respect to a steering unit provided to be rotatable relative to the main body to steer the running wheels. Since the communication antenna is mounted at a position where the deviation from the power supply line can be suppressed as small as possible, the deviation of the communication antenna when traveling on a curve can be further suppressed, and the reliability of communication can be further improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a power supply pickup device.

FIG. 2 is a partially cutaway front view of the carrier.

FIG. 3 is a partial side view of the transport system.

FIG. 4 is a schematic electrical configuration diagram of a transport system.

FIG. 5 is a cross-sectional view of another example of a power supply pickup device.

FIG. 6 is a side view of a conventional power supply pickup device.

FIG. 7 is a perspective view showing an arrangement example of a power feeding coil and a communication antenna.

FIG. 8 is a plan view showing the transport device when traveling on a curve.

FIG. 9 is a plan view showing the power feeding pickup device when traveling on a curve.

[Explanation of symbols]

Reference numeral 3 denotes a traveling rail as a rail, 4 ... a carrier as a moving body, 4a ... a main body, 5 ... a power supply line, 9 ... a driving wheel as a traveling wheel, 10 ... a driven wheel as a traveling wheel, 11 ... a traveling wheel. Guide wheels, 12: steering section as steering section, 1
5: feeding pickup device, 16: ferrite coil as core body, 16b: shaft portion, 18: feeding coil,
19: a receiving antenna coil as a communication antenna and a receiving antenna, 20: a transmitting antenna coil as a communication antenna and a transmitting antenna.

Claims (6)

[Claims] 1. A power supply coil provided for taking in electric power from a power supply line wired on a rail to a moving body traveling on the rail by electromagnetic induction, and a core body on which the power supply coil is wound. A power supply pickup device, comprising: a communication antenna for performing communication by superimposing a signal on an alternating current flowing through the power supply line, the communication antenna being disposed on a shaft portion of the core body. 2. The power feeding pickup device according to claim 1, wherein the power feeding coil and the communication antenna are coaxially wound around a shaft portion of the core body. 3. The communication antenna according to claim 1, wherein the communication antenna is wound around a shaft portion of the core body at a position closer to the power supply line than the power supply coil. Power supply pickup device. 4. The communication antenna includes a transmission antenna and a reception antenna, and the transmission antenna is located at a position closer to the feeder line than the reception antenna with respect to a shaft of the core body. The power supply pickup device according to any one of claims 1 to 3, which is wound. 5. A moving body mounted on a rail to which a power supply line is wired so as to be able to travel, wherein the power supply pickup device according to claim 1 is connected to the power supply line. A moving body provided to have a predetermined positional relationship with respect to. 6. The moving body includes a steering unit that can steer traveling wheels along the rail so as to be rotatable relative to a main body, and the power supply pickup device is integrated with the steering unit. 6. The steering device according to claim 5, wherein the power supply coil and the communication antenna are arranged on the steering unit at a position on the steering unit where the displacement of the power supply coil and the communication antenna from the power supply line can be suppressed as small as possible. The moving object according to the above.