JPH0654403A - Contactless power supply conveying facility - Google Patents

Abstract

PURPOSE:To reduce power consumption of a battery and to improve an operating efficiency by laying a line for supplying a sine wave current of a high frequency along a predetermined line on a predetermined zone before sorting chutes, providing a power supply coil which resonates at the frequency of the line to generate electromotive force in a moving body, and supplying power from the coil to sorting means. CONSTITUTION:A guiding line unit X is longitudinally provided in a predetermined zone along an inner surface of a guide rail B at each sorting chute D. A pickup unit P is provided at a position opposed to a bracket 14 in which a guiding line 17 of the unit X of a lower part of a body 3 of a moving body A is laid. Accordingly, an electromotive force is generated in a pickup coil 19 of the body A which resonates at the frequency of the line 17 according to a magnetic flux generated in the line 17 in the chute D of the rail B. The current is rectified, smoothed by a power receiving unit, conducted to a motor of a roller conveyor E through an inverter to drive the conveyor E, thereby transferring a load C to the chute D.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer facility equipped with a load transfer carriage which transfers a load by moving along a fixed path and distributes the load.

[0002]

2. Description of the Related Art An example of the conventional transfer equipment described above is shown in FIGS.
Explain according to 13. As shown in FIG. 11 to FIG. 13, a guide rail B is provided to levitate the moving body A along the moving path of the moving body A for load transportation, and the moving body A is magnetically levitated. The load C is driven by a linear motor to move, and the loaded load C is distributed to the sorting chute D provided along the guide rail B.
This equipment is installed in a clean room.

The main body 1 of the guide rail B is formed of a non-magnetic material such as aluminum by injection molding or the like into a rectangular tube shape whose upper end surface is opened along the longitudinal direction. A pair of left and right levitation magnetic bodies 2 to which the levitation electromagnet Ma of the moving body A attracts from below are attached to the rear surface of the upper end portion along the longitudinal direction of the opening while being spaced apart in the lateral width direction. Has been. The main body 1 of the guide rail B is configured to move the main body 3 of the moving body A in a state where the main body 3 of the movable body A is housed in the lower portion of the rail.

A primary coil 4 of a linear motor is attached to the inner bottom of the guide rail B. However, as shown in FIG. 13, a plurality of primary coils 4 are provided at intervals along the longitudinal direction of the guide rail B in order to decelerate and stop the moving body A and accelerate and start the moving body A in the sorting chute D. become.

Further, the guide rail B of the sorting chute D section
In order to hold the moving body A in a stopped state, a stopping electromagnet Mb for attracting the stopping magnetic body 5 attached to the moving body A from below is provided in the main body 1. Stopping magnetic body 5
Is provided at each of the front, rear, left and right ends of the moving body A,
A total of four stop electromagnets Mb are provided in accordance with the mounting positions of the stop magnetic bodies 5 so as to act on the stop magnetic bodies 5 separately.

The movable body A has a flat plate-shaped load-carrying portion 6 formed at the upper end thereof, and a roller conveyor E for transporting the load C laterally to the moving direction is provided on the load-carrying portion 6 as a sorting means. When reaching the target sorting chute D, the roller conveyor E is driven to transfer the load C to the sorting chute D. In addition, the moving body A is provided with one each on the front, rear, left and right sides of the moving body A so that the levitation electromagnet Ma attracts the levitation magnetic body 2 from the lower side to the upper side. The secondary conductor 7, which is made of a non-magnetic conductor such as aluminum, acts on the moving body A.
The central portion in the lateral width direction is attached to the support column 8 suspended in the central portion in the lateral width direction of the main body 3 of the moving body A so that the lower end portion of the movable body A is horizontally positioned. The iron plate 9 of the magnetic material portion of the secondary conductor 7 acting on the primary coil 4 is provided on the guide rail B side and only at the installation position of the primary coil 4, and the secondary conductor 7 has the upper surface of the iron plate 9 and the upper surface of the primary coil 4. Is provided so as to pass through this space, and thrust is given to the moving body A while passing through this space.

The levitation electromagnet Ma has a gap within a set range based on information from a gap sensor (not shown) for detecting the gap between the lower surface of the levitation magnetic body 2 and the upper surface of the levitation electromagnet Ma. The battery 10 provided in the main body 3 of the moving body A is energized so as to be maintained, and the stopping electromagnet Mb is energized only while the moving body A is stopped and held on the sorting chute D. Also, from the battery 10 to the roller conveyor E
Is powered.

In FIG. 11, reference numeral 11 is a guide roller for keeping a vertical gap between the levitation magnetic body 2 and the levitation electromagnet Ma when the energization of the levitation electromagnet Ma is stopped, and 12 is a moving body A and the levitation magnet. It is a guide roller for keeping the gap in the lateral width direction with respect to the guide rail B smaller than a set value so as not to collide with the inner lateral surface of the body 2.

[0009]

However, in such a conventional transfer facility, the moving body A is quickly consumed because the battery 10 supplies electric power to the levitation electromagnet Ma and the roller conveyor E. There is a problem that the battery 10 needs to be charged every 6 hours, work efficiency is poor, and the battery 10 must be regularly maintained.

In order to solve such a problem, a current-carrying rail made of a conductive material such as copper is laid along the guide rail B, and the moving body A is contacted with the current-carrying rail to supply power. It is also possible to provide a current collector and charge the battery 10 from the current collector. However, in such a configuration, the current-carrying rail and the current collector wear due to contact with each other, so maintenance is indispensable, and there is a problem that dust cannot be used in a clean room.

The present invention solves the above problems,
It is an object of the present invention to provide a contactless power feeding and transporting facility which can reduce battery consumption, improve work efficiency, and can be used in a clean room.

[0012]

In order to solve the above-mentioned problems, the contactless power feeding and conveying equipment of the present invention is a sorting machine provided along a fixed route on a load carrier truck that moves a fixed route and conveys a load. A sorting means for distributing loads to the chute is provided, and a line for flowing a high-frequency sinusoidal current along the fixed path is laid in a predetermined section before each sorting chute, and the moving body resonates at the frequency of the line, A power supply coil for generating electric power is provided, and power is supplied to the sorting means from the power supply coil.

[0013]

With the structure of the above invention, when the moving body is stopped before the sorting chute and the line in the predetermined section is energized (alternating current), an electromotive force is generated in the power feeding coil, and the moving body is contacted with the predetermined amount without contact. Electric power is supplied in the route of the section, electric power is supplied to and driven by the sorting means, and the load is transferred to the sorting chute.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the same components as those shown in FIGS. 11 to 13 of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is a front view of the contactless power transfer equipment of the present invention, FIG. 2 is a cutaway side view of the contactless power transfer equipment, and FIG. 3 is a schematic plan view of a guide rail layout of the contactless power transfer equipment. Is.

For each sorting chute D, a guide line unit X is provided in the longitudinal direction along the inner surface of the guide rail B in a predetermined section. This guide line unit X is shown in FIG.
As shown in the enlarged view, a plate-shaped bracket 14 formed of an aluminum member that is a magnetic field blocking member and long in the lateral direction (direction along the guide rail B) and a predetermined bracket along the guide rail B are provided on the bracket 14. A pair of hangers 15 which are horizontally attached in the vertical direction at intervals, and a duct 16 made of resin stretched along the guide rail B at the tip of each hanger 15.
And each of the ducts 16 is composed of a guide line 17 laid and connected to the power supply device M installed outside the guide rail B shown in FIG. The guide line 17 is formed by covering a twisted wire (hereinafter, referred to as a Litz wire) formed by collecting insulated thin wires with an insulator, for example, a resin material.

Further, a pickup unit P as a power feeding device is provided in a lower portion of the main body 3 of the moving body A at a position facing the bracket 14 on which the guide line 17 is laid.
As shown in FIG. 5, the pickup unit P has an E-shaped cross section and is long in the lateral direction (the direction along the guide rail B). For example, the litz wire having 10 to 20 turns is wound to form a pickup coil 19, and plate-shaped mounting members 20 are provided at both ends of a side of the ferrite 18. Further, the protrusions 18A, 18B, and 18C of the ferrite 18 are respectively provided with protrusions 18D vertically inwardly at the tips thereof. Further, as shown in FIG. 5A, the mounting member 20 is provided with vertically long mounting holes 20A having semicircular ends. The mounting member 20 and a pair of support members 21 projecting from the moving body A to the guide rail B side are provided in respective mounting holes.
When the moving body A is levitated to a predetermined levitating position by connecting the bolts 22A penetrating between 20A and 21A, the center L of the ferrite 18 of the pickup unit P is approximately at the center of the pair of ducts 16 of the guide line unit X. The pickup unit P is rotated in the vertical direction so as to be positioned vertically to the bracket 14, the pickup unit P is rotated as shown by the arrow, and the upper and lower protrusions 18B and 18C of the ferrite 18 are respectively guided to the guide line unit X. The pair of ducts 16 are vertically moved so as to be positioned above and below the pair of ducts 16, and the nuts 22B are tightened to fix them. As a result of the above attachment, as shown in FIG. 4, the pair of ducts 16 are connected to the pickup coil 19 of the ferrite 18 and the upper and lower projections 18B of the ferrite 18, respectively.
It is located almost in the center of 18C. The pickup unit P is configured so that the ferrite 18 and the pickup coil 19 do not contact the duct 16 and the bracket 14 when the moving body A is not floating.

On the upper surface of the main body 3 of the moving body A, as shown in FIG.
As shown in FIG. 3, a power receiving unit 23 that uses the electromotive force generated in the pickup coil 19 as a power source, a battery 10 that supplies power to the levitation electromagnet Ma, and an inverter 24 that supplies power to the roller conveyor E are provided. Further, the floating position of the moving body A is confirmed by the detection signal of the gap sensor (not shown), and the energization from the battery 10 to the floating electromagnet Ma is controlled.

Detailed circuit configurations of the power supply device M and the power receiving unit 23 will be described with reference to the circuit diagram of FIG. Power supply M
Is an AC200 V three-phase AC power supply 41, a converter 42,
It has a sine wave resonance inverter 43, a transistor 44 and a diode 45 for overcurrent protection. Converter 42
Is a diode 46 for full-wave rectification, a coil 47 that forms a filter, a capacitor 48, a resistor 49, and a transistor 50 that short-circuits the resistor 49.
Reference numeral 43 denotes a transistor 51, 52 driven by a rectangular wave signal alternately oscillated as shown in the figure, a coil 53 for current limitation, and a coil 54 for current supply connected to the transistor 51, 52. , A current-carrying line 60 and a capacitor 55 forming a parallel resonant circuit. The transistor control device is omitted.

In addition, each sorting chute D has a guide line.
In order to energize 17, the changeover switch 61 is inserted in the energization line 60 laid across the sorting chute D, and the dielectric line 17 is inserted in the energization line 60 by the operation of this changeover switch 61, It is energized.

The power receiving unit 23 is connected in parallel to the pickup coil 19 and constitutes a resonance circuit that resonates at the frequencies of the pickup coil 19 and the induction line 17.
A stabilized power supply circuit 33 is provided in which a rectifying diode 32 is connected in parallel with the capacitor 31 of the resonance circuit, and the output of the diode 32 is controlled to a predetermined DC voltage.
Is connected to the motor 62 of the roller conveyor E from the power receiving unit 23 via the inverter 24. In addition, the stabilized power supply circuit 33 includes a coil 35 for current limiting.
And an output adjusting transistor 36, a diode 37 and a capacitor 38 which form a filter. The transistor control device is omitted.

The power supply device M, the energization line 60, and the induction line 17
The operation of the structure of the moving body A will be described. First, the AC200V three-phase AC output from the AC power supply 41 is a converter.
It is converted into a direct current by 42, converted into a high frequency, for example, a 10 kHz sine wave by a sine wave resonance inverter 43, and supplied to the conducting line 60. When the target moving body A arrives at the sorting chute D, the changeover switch 61 is turned on to connect the dielectric line 17 to the energizing line 60, and the guide line 17 laid in front of the sorting chute D. Energize.

In the sorting chute D portion of the guide rail B on which the guide line 17 is laid, an electromotive force is generated in the pickup coil 19 of the moving body A which resonates at the frequency of the guide line 17 due to the magnetic flux generated in the guide line 17. The generated alternating current generated by this electromotive force is rectified by the diode 32 of the power receiving unit 23, regulated to a predetermined DC voltage by the stabilized power supply circuit 33, and supplied to the motor 62 of the roller conveyor E via the inverter 24. Then, the roller conveyor E is driven and the load C is transferred to the sorting chute D.

When the target moving body A is not stopped, the changeover switch 61 is turned off so that the guide line 17 is not energized. Therefore, since the moving body A is not supplied with power except for the sorting chute D section for transferring the load C, the roller conveyor E is not driven, and the conveyance is continued with the load C being placed.

In this way, the roller chute E can be driven without contacting the moving body A in the sorting chute D, and the battery conveyor 10 can be driven without exhausting the battery 10. Therefore, the time interval for charging the battery can be extended as compared with the conventional case. It is possible to improve work efficiency. In addition, the moving body A
Power can be supplied regardless of the moving direction.

Further, since the electric power can be supplied without contact, it can be used in a clean room without generating dust due to the contact between the current-carrying rail and the current collector unlike the conventional case. Also, the opening of the E-shaped ferrite 18 is the bracket 14
As shown in FIG. 4, the pickup coil 19 is fixed by adjusting the pickup coil 19 so that the pickup coil 19 is located at the center of the pair of inductive lines 17 so as to face one lateral side of the inductive line 17. It is located at the position where the generated magnetic flux density is the largest, the largest electromotive force is induced, and power can be efficiently fed.

Furthermore, the length of the current-carrying line 60 is the length of the induction line 17,
Since the length of the pickup coil 19 is longer than that of the pickup coil 19, the primary side inductance of the conducting line 60 is substantially constant, and the capacitor 55 of the power supply device M and the conducting line 60 form a resonance circuit. It is possible to pass a sinusoidal primary side current at a high frequency with a constant large current value on the line 60 and the induction line 17, and also a pickup coil.
By secondary side 19 is resonant circuit, as shown in FIG. 7, the resonance frequency f _o with a large voltage on the secondary side v (in the drawing
1000-2000V), the vertical position of the induction line 17 and the pickup coil 19 changes depending on the floating position of the moving body A, or the frequency of the current-carrying line 60 slightly changes.
Even if the resonance frequency on the secondary side slightly fluctuates from the frequency of the induction line 17, a predetermined value (30 in the figure) in the range of frequencies f _{1 to} f ₂
A secondary voltage of 0 V) or higher can be generated, and thus a large amount of power can be stably supplied. Further, the vertical position can be roughly adjusted, workability is improved, and manufacturing can be facilitated.

Further, by using the litz wire covered with the insulating material for the current-carrying line 60, the induction line 17, and the pickup coil 19, the conductive part is not exposed, the safety can be improved, and the spark is not generated. Therefore, there is no danger of fire and it can be used in explosion-proof areas. Furthermore, since a sine wave is fed to the energization line 60 and the induction line 17, harmonics do not occur,
The generation of radio noise can be eliminated.

Another embodiment of the present invention will be described with reference to FIGS. The same components as those in the above embodiment are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, the moving body A
Is connected to each other and travels on a rail 71 that is a fixed path, and as a sorting means, a belt conveyor 72 that conveys a load C in the left-right direction with respect to the traveling direction is provided, and for each sorting chute D, A guide line unit X is laid along a rail 71 in a predetermined section, a pickup unit P is provided in the moving body A corresponding to the guide line unit X, and a power receiving unit 23 and an inverter 24 for energizing the belt conveyor 72 are provided. ing. The circuit configuration in this embodiment is the same as that shown in FIG. In FIGS. 9 and 10, 73 is a wheel of the moving body A, 74 is a guide roller for maintaining the posture of the moving body A, and 75 is a rack for moving the moving body A by the worm 76 driven at a predetermined position of the rail 71. Is.

With the above structure, the moving bodies A connected to each other by the drive of the worm 76 move on the rails 71, and immediately before the target moving body A arrives, the sorting chute D is energized and connected to the power supply device M. Guide line unit X on line 60
When the induction line 17 laid in front of the sorting chute D is energized by connecting the dielectric line 17 of the pickup chute D, the magnetic flux generated in the induction line 17 causes the pickup coil 19 of the moving body A that resonates at the frequency of the induction line 17. An electromotive force is generated in the electromotive force, and the alternating current generated by the electromotive force is rectified by the diode 32 of the power receiving unit 23, regulated to a predetermined DC voltage by the stabilized power supply circuit 33, and passed through the inverter 24 to the belt conveyor.
The electricity is supplied to 72, the belt conveyor 72 is driven, and the load C is transferred to the sorting chute D. Also, the sorting chute D
Then, when the moving body A passes, the dielectric line 17 is passed through the energization line 60.
Remove from. Further, since the moving body A is not supplied with power except for the sorting chute D section for transferring the load C, the belt conveyor 72 is not driven and the transfer is continued with the load C being placed.

As described above, in the other embodiments as well,
Since the belt conveyor 72 can be driven without contact, it is possible to prevent the generation of dust due to the contact between the current-carrying rail and the current collector as in the past, and because the battery 10 and the current-carrying rail are not used, periodic maintenance is possible. It is not necessary to carry out, and workability can be improved.

In the above two embodiments, one duct 16 is provided with one induction line 17, but
Laying two or more guide lines 17 in one duct 16,
It can also be powered up. Also, the power receiving unit
It is possible to extract a direct current from the stabilized power supply circuit 33 of 23, supply power to the lamp, and display that transfer is in progress.

[0033]

As described above, according to the present invention, when a moving body is stopped before a sorting chute and a line in a predetermined section is energized (alternating current), an electromotive force is generated in a power feeding coil to feed power. Since the sorting means is supplied with electricity and the load is transferred to the sorting chute, the sorting means can be driven without using a battery, a current-carrying rail, and a current collector as in the conventional case, so that regular maintenance is performed. It is not necessary and the work efficiency can be improved. Further, it is possible to prevent the generation of dust due to the contact between the current-carrying rail and the current collector as in the conventional case, and it becomes possible to use it in a clean room.

[Brief description of drawings]

FIG. 1 is a front view of a contactless power feeding and conveying facility according to an embodiment of the present invention.

FIG. 2 is a cutaway side view of the contactless power feeding and conveying facility.

FIG. 3 is a schematic plan view of a layout of a guide rail of the contactless power feeding and conveying facility.

FIG. 4 is a sectional view of an essential part of a pickup unit section of the contactless power feeding and conveying facility.

FIG. 5 is a plan view, a front view, and a side view of a pickup unit of the contactless power feeding and conveying facility.

FIG. 6 is a circuit configuration diagram of the contactless power feeding and conveying facility.

FIG. 7 is a secondary side frequency-electromotive force characteristic diagram of the contactless power feeding and conveying facility.

FIG. 8 is a perspective view of an essential part of contactless power feeding and conveying equipment according to another embodiment of the present invention.

FIG. 9 is a front view of the contactless power feeding and conveying facility.

FIG. 10 is a cutaway side view of the contactless power feeding and conveying facility.

FIG. 11 is a front view of a conventional contactless power feeding and conveying facility.

FIG. 12 is a cutaway side view of a conventional contactless power feeding and conveying facility.

FIG. 13 is a schematic plan view of a layout of a guide rail of a conventional contactless power feeding and conveying facility.

[Explanation of symbols]

A moving body B guide rail (constant path) C load D sorting chute E roller conveyor (sorting means) M power supply device P pickup unit X induction line unit Ma levitation electromagnet Mb levitation electromagnet 2 levitation magnetic body 4 primary coil 5 stop Magnetic material 7 Secondary conductor 9 Iron plate 10 Battery 14 Bracket 15 Hanger 16 Duct 17 Induction line 18 Ferrite 19 Pickup coil 20 Mounting member 23 Power receiving unit 24 Inverter 31 Capacitor 43 forming a resonance circuit with pickup coil 43 Sine wave resonance inverter 55 Induction Capacitors that form a resonant circuit with a track 71 Rail (fixed path) 72 Belt conveyor (sorting means)

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B65G 47/64 8010-3F 54/02 9245-3F H02K 41/02 B 7346-5H

Claims (1)

[Claims] 1. A loading carrier for moving a load along a fixed route, and a sorting means for sorting the load to a sorting chute provided along the fixed route, wherein each sorting chute has a predetermined section. A line for passing a high-frequency sinusoidal current is laid along a fixed path, a power supply coil that resonates at the frequency of the line and generates an electromotive force is provided on the moving body, and the power supply coil supplies power to the sorting means. A contactless power feeding and conveying facility characterized by: