JP7065554B2 - Self-propelled transfer device - Google Patents

Description

The present invention relates to a self-propelled transport device for transporting a work mounted on the transport vehicle along a work transport path by traveling a transport vehicle on which the work can be mounted.

Conventionally, as a work transfer system for transporting articles such as products or parts (these are referred to as "work" in this specification) on a production line, a self-propelled type using a work transfer pallet that runs on a rail. A transport device has been proposed (see, for example, Patent Document 1).

The self-propelled work transfer pallet in this self-propelled transfer device is capable of storing the wheels on both sides of the work transfer pallet rail that rotate on the track, the electric motor that rotates the wheels, and the electric motor that drives the electric motor. It shall be equipped with a battery.

Then, as the power feeding means to the battery, the rail side non-contact power feeding means is provided on the work transport pallet rail, and the self-propelled work transport pallet is provided with the main body side non-contact power feeding means facing the rail side non-contact power feeding means. It is said that the self-propelled work transfer pallet is built in the pallet to supply power to the battery in a non-contact manner when the self-propelled work transfer pallet is stopped or passed.

In such a self-propelled transfer device, a battery is provided in the self-propelled work transfer pallet so that the self-propelled work transfer pallet itself can store electricity, so that there is no need for constant power supply, and a brush for non-contact power supply. The problem of wear is solved and dust generation is suppressed. In addition, since it does not depend on the contact state, it is possible to supply power in a stable state.

Japanese Patent Application Laid-Open No. 2003-306144

However, in the above-mentioned conventional self-propelled transfer device, although the self-propelled work transfer pallet itself is provided with a battery in order to be able to store electricity, the battery itself is relatively large and heavy. Since it is a certain one, there is a problem that the weight of the self-propelled transport pallet itself is increased. This increase in weight causes a decrease in acceleration and deceleration of the self-propelled work transfer pallet during transportation, and there still remains a problem to be solved that prompt work transfer becomes difficult.

In order to solve this problem, instead of mounting a battery on a transport vehicle such as a self-propelled work transfer pallet, the electric motor is directly driven by the electric power supplied by the power feeding means to drive the self-propelled work transfer pallet. It is conceivable to drive such a transport vehicle directly by its electric power.

However, the non-contact power feeding means in the conventional self-propelled transport device is a power feeding transformer, and the non-contact power feeding means is distributed to each work station existing at a predetermined interval in the transport path. Power can be supplied only when a transport vehicle such as a self-propelled work transfer pallet stops or passes there, and power is always supplied while the transport vehicle is running. not. Therefore, there is a reality that the electric motor cannot be directly driven by the electric power supplied by the power feeding means, and it is not possible to eliminate the need to mount the battery in the transport vehicle such as the self-propelled work transport pallet.

An object of the present invention is to provide a self-propelled transport device capable of constantly supplying power to a transport vehicle and reducing the weight of the transport vehicle.

The present invention is a self-propelled transport device including a work transport path, a self-propelled transport vehicle guided by the work transport path, an electric motor for self-propelling the transport vehicle, and a power feeding means for supplying power to the electric motor. It is an improvement of.

Its characteristic configuration is that the power feeding means receives the magnetic flux generated by the feeding side coil provided along the work transport path, the power receiving side coil provided in the transport vehicle, and the feeding side coil provided in the transport vehicle. It is equipped with a matching coil that performs load matching for transmission to the coil.

In this case, the feeding side coil is an oval coil having a parallel portion, and a traveling plate made of a non-magnetic material is provided along the work transport path, and the parallel portion is fed so as to extend in the transport direction of the work transport path. It is preferable that the side coil is arranged on the traveling plate.

Then, the matching coil is formed in a spiral shape and is attached to the facing portion facing the traveling plate of the transport vehicle self-propelled on the work transport path, and the power receiving side coil is formed in a spiral shape capable of surrounding the matching coil and facing the facing portion. It is preferable that the matching coil is mounted so as to surround the matching coil.

On the other hand, when a traveling plate is laid on the work transfer path so that the transport vehicle can run on its own, the matching coil is formed in a spiral shape and attached to the lower surface of the transport vehicle facing the traveling plate, and the power receiving side coil serves as the matching coil. It is also formed in a swirl shape that can be surrounded and can be attached to the lower surface of the transport vehicle so as to surround the matching coil.

Further, it is preferable to interpose a shielding plate made of a soft magnetic material between the matching coil and the power receiving side coil and the transport vehicle, the width dimension of the parallel portion of the feeding side coil is L, and the power receiving side coil surrounding the matching coil. When the outer diameter is OD, it is more preferable that L ≧ OD.

Further, a control device provided in the transport vehicle and driven by electric power supplied by the power feeding means to control the electric motor, and an operation device that wirelessly emits a control signal to the control device can be further provided.

In the self-propelled transport device of the present invention, the power feeding means is a so-called non-contact power feeding means including a power feeding side coil and a power receiving side coil provided in the transport vehicle. Therefore, as compared with the conventional contact type power feeding means, it is possible to suppress the generation of dust due to the wear of the contacting power feeding brush.

On the other hand, in the non-contact power feeding means including the power feeding side coil and the power receiving side coil, when the distance (Gap) between the power feeding side coil and the power receiving side coil is separated, or when their positions are displaced, etc. Although sufficient power supply becomes difficult, in the self-propelled transfer device of the present invention, the power supply means includes a matching coil for load matching for transmitting the magnetic flux generated in the power supply side coil to the power supply side coil. It has the advantage of maximizing the efficiency of the characteristics that the transmission efficiency deteriorates due to the decrease in coupling coefficient and the deviation of load matching caused by the distance and position deviation between the side coil and the power receiving side coil.

Therefore, by providing the feeding side coil along the work transport path, it is possible to constantly supply power during traveling, and it is possible to directly drive the electric motor by the power supplied by the feeding means. Then, it becomes unnecessary to mount the battery in the transport vehicle, and it becomes possible to reduce the weight of the transport vehicle.

Further, in the self-propelled transfer device of the present invention, since the magnetic flux generated in the power feeding side coil is collected by the matching coil and efficiently transferred to the power receiving side coil, the power feeding side coil is larger than the power receiving side coil. However, appropriate power transmission can be performed. Therefore, for example, if the feeding side coil is an elliptical coil extending in the transporting direction of the work transport path, it is possible to simultaneously run a plurality of transport vehicles having the power receiving side coil along the work transport path.

When a plurality of transport vehicles are driven along the work transport path, the transport vehicle is provided with a control device that is driven by the electric power supplied to the electric motor to control the electric motor, and the control signal is wirelessly transmitted to the control device. By providing the operation device that emits at the above, it is possible to operate the plurality of transport vehicles separately, and it is possible to achieve a variety of transport modes.

FIG. 6 is a sectional view taken along line AA of FIG. 4 showing a configuration of a self-propelled transport device according to an embodiment of the present invention. It is sectional drawing BB of FIG. It is a cross-sectional view taken along the line CC of FIG. It is a top view which shows the structure of the self-propelled transfer device. It is a schematic diagram which shows the state of the magnetic flux generated by the feeding means. It is sectional drawing corresponding to FIG. 1 which shows the structure of another self-propelled transfer apparatus of this invention.

Next, the best mode for carrying out the present invention will be described with reference to the drawings.

The self-propelled transfer device of the present invention is shown in FIG. The self-propelled transport device 10 of the present invention includes a work transport path 11 and a transport vehicle 20 guided by the work transport path 11 and capable of self-propelling.

As shown in FIG. 4, the work transfer path 11 in this embodiment connects work stations 1 to 4 that separately perform processes such as assembly, processing, and cleaning in a truck shape, and conveys the work along the connection path. An example is shown in which the vehicles 20 are driven in order.

As shown in FIG. 1, the work transport path 11 in this embodiment has a flat plate path 12 long in the transport direction and the flat plate paths 12 on both sides of the flat plate path 12 in the width direction in order to drive the transport vehicle 20. It shall have a pair of side walls 13 and 14 which are erected so as to be sandwiched between them and prohibit the movement of the transport vehicle 20 traveling on the flat plate road 12 in the width direction. Here, in FIG. 1, the flat plate path 12 and the pair of side walls 13 and 14 are each made of a non-magnetic material, and they are integrally formed. The work transport path 11 in the figure shows a case where the work transfer path 11 is installed at the installation location 10a via a support column 16 provided so as to extend downward from the lower surface of the flat plate path 12.

As shown in FIGS. 1 and 3, the transport vehicle 20 whose traveling route is guided to the work transport path 11 has a chassis plate 21 that can enter horizontally between the pair of side walls 13 and 14, and the chassis plate thereof. A plurality of tires 22 for running 21 along a flat road 12 and an electric motor 23 for rotating at least one of the tires 22 to self-propell the transport vehicle 20 are provided. As shown in FIG. 3, in this embodiment, three tires 22 are pivotally supported on a chassis plate 21 with their rotation axes parallel to each other, and a pulley 24 is coaxially supported on one of the tires 22. It will be provided.

Further, the electric motor 23 rotates the rotating shaft 23a by DC (DC), and the rotating shaft 23a is provided on the chassis plate 21 so as to be parallel to the rotating shaft of the tire 22, and the rotation thereof is performed. A pulley 23b is further provided on the shaft 23a. Then, a belt 25 is erected between the pulley 24 of the tire 22 and the pulley 23b of the electric motor 23, and when the electric motor 23 is driven and the rotating shaft 23a rotates together with the pulley 23b, the tire 22 is moved via the belt 25. It is configured to rotate and run the transport vehicle 20.

Further, support pieces 26 are attached to the chassis plate 21 so as to be parallel to the side walls 13 and 14 on both sides in the width direction thereof, and the side walls 13 and 14 can be contacted in front of and behind the support pieces 26. Laura 27 is pivotally supported respectively. In this way, the rollers 27 are pivotally supported at the four corners of the chassis plate 21 via the support piece 26, whereby the transport vehicle 20 is configured to be able to travel quickly along the work transport path 11.

As shown in FIG. 1, a plurality of support pillars 29 are erected on the upper surface of the chassis plate 21, and a mounting portion 28 for mounting a work is provided on the upper end of the support pillar 29 in parallel with the chassis plate 21. It shall be. The self-propelled transport device 10 of the present invention includes a power feeding means 30 that rotates at least one of the plurality of tires 22 to supply power to the electric motor 23 that self-propels the transport vehicle 20.

The power feeding means 30 is generated by the feeding side coil 31 provided along the work transport path 11, the power receiving side coil 32 provided in the transport vehicle 20, and the feeding side coil 31 provided in the transport vehicle 20. It is equipped with a matching coil 33 that performs load matching for transmitting the magnetic flux to the power receiving side coil 32, and transmits power to the power receiving side coil 32 via the magnetic flux generated by passing a current through the feeding side coil 31. be.

That is, as shown in FIG. 5, the power feeding means 30 in the present embodiment supplies electric power to the feeding side coil 31 from the high frequency power supply device 34, generates a magnetic flux B in the feeding side coil 31, and causes the magnetic flux B to generate electric power. Power is supplied in a non-contact manner by utilizing the electromagnetic induction generated in the power receiving side coil 32. The feeding side coil 31, the power receiving side coil 32, and the matching coil 33 may be formed by winding with a single wire, a litz wire, or the like, respectively, or may be a flexible substrate (FPC), a printed circuit board (FR-4 substrate), or the like. It may be manufactured on a flat substrate of.

As shown in FIGS. 4 and 5, the feeding side coil 31 in this embodiment connects the parallel portions 31b and 31c and both sides of the parallel portions 31b and 31c in an arc shape by winding with a single wire or a litz wire. It is created in an oval shape having connecting portions 31d and 31e. The lengths of the parallel portions 31b and 31c are formed so as to be substantially equal to the total length of the transport path.

As shown in FIG. 1, on the flat plate road 12 in the work transport path 11, a traveling plate 17 capable of self-propelling the transport vehicle 20 is laid over the entire length thereof. The traveling plate 17 is made of a non-magnetic material, is formed thick on both sides in the width direction, and a gap is formed between the traveling plate 17 and the flat plate road 12 in the central portion. The feeding side coil 31 forming an oval shape has parallel portions 31b, 31c over the entire length of the work transport path 11 on the lower surface of the traveling plate 17 having a gap formed between the coil 31 and the flat plate path 12. Is laid out while maintaining a predetermined width dimension L (FIG. 4).

On the other hand, the power receiving side coil 32 is formed by winding a single wire or a litz wire in a spiral shape, and is attached to the lower surface of the transport vehicle 20. Further, even in the matching coil 33, it is formed by winding a single wire or a litz wire in a spiral shape and is attached to the lower surface of the transport vehicle 20 facing the traveling plate 17.

A shielding plate 36 made of a soft magnetic material is attached to the lower surface of the chassis plate 21 of the transport vehicle 20. The soft magnetic material is, for example, a soft magnetic material such as an amorphous alloy, permalloy, silicon steel, sendust alloy, and soft magnetic ferrite, and is a composite material in which one kind or a plurality of magnetic materials having different magnetic permeabilitys are combined. Can also be used.

The matching coil 33 and the power receiving side coil 32 are attached to the lower surface of the shielding plate 36. In this way, a shielding plate 36 made of a soft magnetic material is interposed between the matching coil 33 and the power receiving side coil 32 and the transport vehicle 20. By interposing the shielding plate 36 in this way, the shielding plate 36 prevents the magnetic flux generated below the shielding plate 36 from affecting each circuit mounted on the upper surface of the chassis plate 21.

Further, the power receiving side coil 32 according to the present embodiment is formed in a spiral shape capable of surrounding the matching coil 33, and is attached to the lower surface of the transport vehicle 20 so as to surround the matching coil 33. The gap between the feeding side coil 31, the power receiving side coil 32, and the matching coil 33 that occurs when the transport vehicle 20 travels on the upper surface of the traveling plate 17 is on the power receiving side through the magnetic flux generated in the feeding side coil 31. It is assumed that the size of the tire 22 and the thickness of the shielding plate 36 are selected so as to be within the range in which electric power can be transmitted to the coil 32.

Here, as shown in FIG. 5, the power receiving side coil 32 generates an alternating current by the magnetic flux B generated when an alternating current of a predetermined frequency is passed through the feeding side coil 31, and the electric motor 23 is generated by this electric power. A rectifier circuit 37 is connected to the power receiving side coil 32 in order to drive (FIG. 3). Then, as shown in FIG. 3, the rectifier circuit 37 is provided on the chassis plate 21.

Returning to FIG. 5, the matching coil 33 resonates at a predetermined frequency to perform load matching, collects the magnetic flux B generated in the feeding side coil 31, and efficiently transfers it to the power receiving side coil 32. Therefore, the matching coil 33 is adjusted by adding a capacitor 38 in series or in parallel so that a predetermined frequency is set as the resonance frequency.

This predetermined frequency is the frequency of the current flowing from the high-frequency power supply device 34 to the feeding side coil 31 in order to generate the magnetic flux B. The resonance frequency of the matching coil 33 is a capacitance component generated by the capacitance of the added capacitor 38, the self-resonance of the matching coil 33 itself, and the overlap with the shielding plate 36 (FIG. 1) on which the matching coil 33 is provided. Adjusted by using.

For example, as shown in FIG. 5, when the matching coil 33 constitutes a series resonance circuit with the capacitor 38, the load becomes high and the efficiency becomes high. High load and high efficiency. Therefore, in the configuration in which the matching coil 33 is arranged, it is possible to obtain high efficiency in a wide load range.

Here, when the width dimension of the parallel portions 31b and 31c of the feeding side coil 31 is L and the outer diameter of the power receiving side coil 32 surrounding the matching coil 33 is OD, L ≧ OD. When such a relational expression is satisfied, the magnetic flux B generated in the power feeding side coil 31 can be efficiently collected and transferred to the power receiving side coil 32.

As shown in FIG. 3, the chassis plate 21 is provided with a control device 39 that is driven by the electric power supplied by the power feeding means 30 to control the electric motor 23. The control device 39 in the figure includes a motor control circuit 39a that is driven by DC power converted by a rectifier circuit 37 to drive an electric motor 23, and a wireless communication unit 39b connected to the motor control circuit 39a.

Further, as shown in FIG. 4, outside the work transport path 11, an operating device 41 that wirelessly emits a control signal to the control device 39 provided in the transport vehicle 20 is installed, and the operating device 41 emits the control device 41. Power is supplied from the motor control circuit 39a to the electric motor 23 by the control signal received by the wireless communication unit 39b in the control device 39, and the carrier vehicle 20 is driven based on the control signal.

Next, the operation in such a self-propelled transfer device will be described.

In the self-propelled transport device 10, a work (not shown) to be transported is mounted on a mounting portion 28 of the transport vehicle 20, and the transport vehicle 20 is driven in that state. In order to drive the transport vehicle 20, first, the power feeding means 30 is operated, and then the control device 39 provided in the transport vehicle 20 is operated. Therefore, the high-frequency power supply device 34 causes a current of a predetermined frequency to flow through the feeding-side coil 31, and as shown in FIG. 5, a magnetic flux B is generated in the feeding-side coil 31. Then, in the power receiving side coil 32 provided in the transport vehicle 20, electric power is generated by the electromagnetic induction of the magnetic flux B, and the control device 39 (FIG. 3) is operated by the electric power.

As described above, in the self-propelled transport device of the present invention, the power feeding means 30 is a so-called non-contact power feeding means 30 including the feeding side coil 31 and the power receiving side coil 32 provided in the transport vehicle 20. As compared with the contact type feeding means having a contact brush in contact with the electrode used from the above, it does not cause a problem such as generation of dust due to wear of the contacting feeding brush.

On the other hand, in the non-contact power feeding means including only the power feeding side coil 31 and the power receiving side coil 32, when the distance (Gap) between the power feeding side coil 31 and the power receiving side coil 32 is separated, or their In the self-propelled transfer device of the present invention, the power feeding means 30 is generated not only in the power feeding side coil 31 and the power receiving side coil 32 but also in the power feeding side coil 31, although it becomes difficult to sufficiently supply power when the position is displaced. A matching coil 33 for load matching for transmitting the generated magnetic flux to the power receiving side coil 32 is provided.

A resonance capacitor 38 is added to the matching coil 33 so as to be tuned to the drive frequency of the current flowing through the feeding side coil 31 to form an LC boost circuit, and a magnetic flux B is generated in the feeding side coil 31. Then, the matching coil 33 provided in the transport vehicle 20 resonates at a predetermined frequency, and the matching coil 33 collects the magnetic flux B generated in the feeding side coil 31 due to the resonance and efficiently collects the magnetic flux B generated in the feeding side coil 31 to the power receiving side coil 32. Hand over. As a result, it is possible to prevent the transmission efficiency from being deteriorated due to the decrease in the coupling coefficient and the load matching deviation caused by the distance and the positional deviation between the power feeding side coil 31 and the power receiving side coil 32, and to maximize the transmission efficiency.

In this way, since the magnetic flux B generated in the power feeding side coil 31 is collected by the matching coil 33 and efficiently delivered to the power receiving side coil 32, it is appropriate even when the power feeding side coil 31 is larger than the power receiving side coil 32. Power transmission is possible. Therefore, by providing the feeding side coil 31 along the work transport path 11 over the entire length of the path on which the transport vehicle 20 should travel, the transport vehicle 20 stops or travels at any position on the work transport path 11. Even if it is, the power supply to the transport vehicle 20 becomes possible.

As described above, according to the present invention in which the electric power can be constantly supplied while the transport vehicle 20 is running, the electric motor 23 can be directly driven by the electric power supplied by the electric power supply means 30. Therefore, the electric motor can be driven directly. It is no longer necessary to mount a power storage means such as a battery for driving the 23 on the transport vehicle 20. Therefore, the transport vehicle 20 in the present invention can reduce the weight of the transport vehicle 20 by not mounting the battery as compared with the conventional transport vehicle that requires the mounting of the battery. When the weight of the transport vehicle 20 is reduced, the acceleration and deceleration of the transport vehicle during transport can be improved, and the self-propelled transport device 10 can quickly transport the work.

As shown in FIG. 3, when the control device 39 is driven by the electric power supplied by the power feeding means 30, the chassis plate 21 is provided on the carrier vehicle 20 by the operation device 41 installed outside the work transfer path 11. It is possible to wirelessly emit a control signal to the control device 39. Then, when the operating device 41 emits a control signal, the wireless communication unit 39b in the control device 39 receives it, and the motor control circuit 39a supplies power to the electric motor 23 by the control signal to provide the rotary shaft 23a. It is driven so as to rotate, and the transport vehicle 20 is driven based on the control signal.

Therefore, since the traveling and stopping of the transport vehicle 20 is based on the command from the control device 39, as shown in FIG. 4, the feeding side coil 31 extends in the transport direction of the work transport path 11 and extends over the entire length thereof. With the provided elliptical coil, it is possible to simultaneously run a plurality of transport vehicles 20 having the power receiving side coil 32 along the work transport path 11.

When a plurality of transport vehicles 20 are traveled along the work transport path 11, the control device 39 of each transport vehicle 20 is provided with an operation device 41 that wirelessly and separately emits control signals, whereby the plurality of transport vehicles 20 are provided. It is also possible to operate the transport vehicle 20 separately, and it is possible to achieve a variety of transport modes.

In the above-described embodiment, the work transport path 11 in which a pair of side walls 13 and 14 are erected on both sides of the flat plate path 12 in the width direction has been described. However, as long as the transport vehicle 20 can be guided, the work transport path is not limited to this, and may be something like a rail that has been conventionally used.

Further, in the above-described embodiment, the case where the electric motor 23 rotates the tire 22 to drive the transport vehicle 20 has been described. However, as long as the electric motor 23 can self-propell the transport vehicle 20, what the electric motor 23 rotates is not limited to the tire 22. For example, when the work transport path is like a rail, the electric motor may rotate the wheels that can be rolled on the rail to run the transport vehicle 20, and the work transport path is like a rack gear. If the equipment is provided, the transport vehicle 20 may be driven by rotating a rollable pinion gear on the rack gear by an electric motor.

Further, in the above-described embodiment, the transport vehicle 20 is driven based on the control signal emitted by the operating device 41, and a plurality of transport vehicles 20 can be separately controlled to travel along the work transport path 11. explained. However, in the case where a plurality of transport vehicles 20 provided in the work transport path 11 are controlled in the same manner, it is not always necessary to provide the control device 39 in the transport vehicle 20. For example, the transport vehicle 20 may be driven when the electric power is supplied by the power feeding means 30, and the transport vehicle 20 may be stopped by stopping the supply of the electric power.

Further, in the above-described embodiment, the power feeding side coil 31, the power receiving side coil 32, and the matching coil 33, in which a single wire or a litz wire is wound in a spiral shape, have been described, but the power supply side coil 32 and the matching coil 33 are not limited to the spiral shape as long as power can be supplied. The feeding side coil 31, the power receiving side coil 32, and the matching coil 33 may be wound in a spiral shape, or may be a combination of a spiral and a spiral, for example, an α winding or the like. good.

Further, in the above-described embodiment, the case where the traveling plate 17 provided with the feeding side coil 31 is laid on the work transport path 11 and the power receiving side coil 32 and the matching coil 33 are attached to the lower surface of the transport vehicle 20 has been described. However, the traveling plate 17 provided with the feeding side coil 31 is not limited to the case where it is laid in the work transport path 11.

For example, as shown in FIG. 6, the traveling plate 17 may be erected adjacent to the work transport path 11 over the entire length of the work transport path 11. Even in such a case, the feeding side coil 31 is arranged on the traveling plate 17 so that the parallel portions 31b and 31c extend in the transporting direction of the work transport path 11, and the transporting vehicle 20 facing the feeding side coil 31 is arranged. The power receiving side coil 32 and the matching coil 33 may be attached to the facing portions of the above.

In FIG. 6, a traveling plate 17 is erected on the side wall 14 of the work transport path 11, and an auxiliary plate 20a is provided on the work transport vehicle 20 so as to face the traveling plate 17 at a predetermined interval, and the auxiliary plate 20a is provided. The case where the power receiving side coil 32 and the matching coil 33 are attached to the above is shown. In this way, the matching coil 33 can be formed in a spiral shape and attached to a portion facing the traveling plate 17 of the self-propelled transport vehicle 20 on the work transport path 11, and the power receiving side coil 32 can surround the matching coil 33. Even if the matching coil 33 is formed in a spiral shape and attached so as to surround the matching coil 33, it is possible to constantly supply power to the transport vehicle 20, and it is not necessary to mount a storage means such as a battery on the transport vehicle 20. , The weight of the transport vehicle 20 can be reduced.

10 Self-propelled transport device 11 Work transport path 17 Travel plate 20 Transport vehicle 23 Electric motor 30 Feeding means 31 Feeding side coil 31b, 31c Parallel part 32 Power receiving side coil 33 Matching coil 36 Shielding plate 39 Control device 41 Operating device B Magnetic flux L Width dimension of parallel part of power feeding side coil OD Outer diameter of power receiving side coil

Claims (6)

A work transport path (11), a self-propelled transport vehicle (20) guided by the work transport path (11), an electric motor (23) for self-propelling the transport vehicle (20), and the electric motor. In a self-propelled transport device equipped with a power feeding means (30) for supplying power to (23),
The power feeding means (30) includes a power feeding side coil (31) provided along the work transport path (11), a power receiving side coil (32) provided in the transport vehicle (20), and the transport vehicle ( It is provided with a matching coil (33) provided in 20) for load matching for transmitting the magnetic flux (B) generated by the feeding side coil (31) to the receiving side coil (32).
The feeding side coil (31) is an oval coil having parallel portions (31b, 31c).
A traveling plate (17) made of a non-magnetic material is provided along the work transport path (11).
The feeding side coil (31) is arranged on the traveling plate (17) so that the parallel portions (31b, 31c) extend in the transport direction of the work transport path (11).
A self-propelled transport device characterized by this . The matching coil (33) is formed in a spiral shape and is attached to a portion facing the traveling plate (17) of the transport vehicle (20) that self-propells on the work transport path (11).
The power receiving side coil (32) is formed in a spiral shape capable of surrounding the matching coil (33), and is attached to the facing portion so as to surround the matching coil (33).
The self-propelled transport device according to claim 1 . A traveling plate (17) is laid on the work transport path (11) so that the transport vehicle (20) can run on its own.
The matching coil (33) is formed in a spiral shape and is attached to the lower surface of the transport vehicle (20) facing the traveling plate (17).
The power receiving side coil (32) is formed in a spiral shape capable of surrounding the matching coil (33), and is attached to the lower surface of the transport vehicle (20) so as to surround the matching coil (33).
The self-propelled transport device according to claim 1 . The self-propelled transfer device according to claim 2 or 3 , wherein a shielding plate (36) made of a soft magnetic material is interposed between the matching coil (33) and the power receiving side coil (32) and the transfer vehicle (20). The width dimension of the parallel part (31b, 31c) of the feeding side coil (31) is L,
When the outer diameter of the power receiving side coil (32) surrounding the matching coil (33) is OD,
The self-propelled transport device according to any one of claims 2 to 4 , wherein L ≧ OD. A control device (39) provided in the transport vehicle (20) and driven by electric power supplied by a power feeding means to control an electric motor (23) , and an operation device that wirelessly emits a control signal to the control device (39). The self-propelled transfer device according to any one of claims 1 to 5, further comprising (41).

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