JP2021187593A - Noncontact power supply system of elevator - Google Patents

Abstract

To provide a noncontact power supply technique of an elevator for supplying power to a car through a conductor wire by using the magnetic field coupling capable of suppressing the shaking of the conductor wire by a simple structure.SOLUTION: A noncontact power supply system is a system for supplying power to a car in an elevator without contact and includes a conductor wire, a power receiving coil, and a holding tool. The conductor wire generates a magnetic field for supplying power and has a pair of hanging parts hanging downward in a hoistway. The power receiving coil is provided on the car and receives power from the conductor wire by the magnetic field coupling. The holding tool holds the pair of hanging parts to form a predetermined interval therebetween.SELECTED DRAWING: Figure 1

Description

The present invention relates to a technique for non-contactly supplying power to a car in an elevator.

As a technique for supplying power to a car in an elevator in a non-contact manner, Patent Document 1 discloses a technique in which a conductor wire is laid in a hoistway and power is supplied from the conductor wire to the car using electromagnetic induction. Has been done. Specifically, the conductor wire is hung in a U-shape in the hoistway, so that a pair of hanging hangs is formed on the conductor wire. In addition, a power receiving coil is provided in the car, and the power receiving coil is arranged in a state close to the pair of hanging so as to enable magnetic field coupling with the conductor wire (a pair of hanging) by electromagnetic induction. To.

Japanese Unexamined Patent Publication No. 2001-310879 Japanese Unexamined Patent Publication No. 2014-183668

When power is supplied by electromagnetic induction as in Patent Document 1, it is necessary to bring the power receiving coil close to the conductor wire (a pair of hanging portions) as described above. Therefore, when the car or the conductor wire is shaken, the conductor wire may come into contact with the power receiving coil or the car, and they may be damaged.

Therefore, the present inventors have considered applying the power feeding technology using the magnetic field resonance disclosed in Patent Document 2 to the elevator to supply power from the conductor wire to the car by using the magnetic field resonance. There is. This is because, according to the power supply using magnetic field resonance, even if the distance between the conductor wire (a pair of hangings) and the power receiving coil is relatively large so as to avoid the above contact, they are magnetically coupled. This is because it is possible to supply power to the car.

However, the conductor wire may also sway so that the distance between the pair of sags changes, and such sway of the conductor wire changes the magnetic field for feeding and the resonance frequency. , Can have a great effect on power supply efficiency.

For example, Patent Document 1 discloses that the conductor wire is suppressed from shaking by fixing the conductor wire to the guide rail via a fixture (rail bracket). However, in relation to other equipment, it is not always possible to fix the conductor wire to the guide rail so as to suppress the shaking of the conductor wire.

Therefore, an object of the present invention is to suppress the shaking of the conductor wire with a simple configuration in the non-contact power feeding technology of an elevator that supplies power from the conductor wire to the car by using magnetic field coupling.

The non-contact power supply system according to the present invention is a system that non-contactly supplies power to a car in an elevator, and includes a conductor wire, a power receiving coil, and a holder. The conductor wire is a conductor wire that generates a magnetic field for feeding, and has a pair of hanging portions that hang downward in the hoistway. The power receiving coil is provided in the car and receives electric power from the conductor wire by magnetic field coupling. The retainer holds a pair of sabotages at predetermined intervals between them.

According to the non-contact power feeding system, in a simple configuration provided with a holder, the distance between the pair of hanging portions is maintained at a predetermined distance at the mounting position of the holder on the conductor wire. Therefore, it becomes easy to suppress the shaking of the conductor wire such that the distance between the pair of hanging portions changes, and as a result, it becomes easy to prevent the influence on the feeding efficiency that may occur due to the shaking of the conductor wire. ..

The non-contact power feeding system may include a plurality of holders. Then, a pair of hanging portions may be held by a holder at a plurality of positions of the conductor wire in the moving direction of the car. According to this configuration, it is possible to maintain the distance between the pair of sags at a predetermined distance over the entire range of the conductor wires in the moving direction of the car.

The non-contact power supply system may further include auxiliary lines arranged in the hoistway. Then, a plurality of holders for holding the pair of hanging portions may be connected to each other via an auxiliary line. According to this configuration, the holders themselves are less likely to sway because the holders are connected to each other by the auxiliary wire, and as a result, the conductor wire held by the holder sways in the direction approaching the car. That is, shaking that may cause a collision with the car is suppressed).

In the non-contact power feeding system, the holder may have a first arm portion and a second arm portion for sandwiching a pair of hanging portions, and at least the first arm portion and the second arm portion. On any one of them, two grooves may be formed so as to pass a pair of hanging portions, respectively, with a predetermined interval between them. According to such a holder, although the structure is simple, the holder to the conductor wire can be easily operated by passing a pair of hanging portions through two grooves and then sandwiching the hanging parts with the holding tool. At the same time as the attachment of, a pair of hangings can be held at a predetermined interval between them.

In the non-contact power feeding system, the inner surface of the groove may be provided with a protrusion that bites into the hanging portion passed through the groove. According to this configuration, it becomes possible to bite the protrusion into the hanging portion passed through the groove. Then, the protrusion bites into the hanging portion, so that the holder is less likely to slip off along the conductor wire, and the holder is firmly fixed to the conductor wire.

According to the present invention, it is possible to suppress the shaking of the conductor wire with a simple configuration.

It is a conceptual diagram which showed the non-contact power supply system of the elevator which concerns on embodiment. It is a perspective view which showed the holder. It is a perspective view which showed the attachment state of the holder to the conductor wire. It is a conceptual diagram which showed the non-contact power supply system of the elevator which concerns on the 1st modification. It is a figure which showed two examples about a holder as a 2nd modification. It is a figure which showed two other examples about a holder as a third modification. It is a figure which showed the further example about a holder as a 4th modification.

[1] Embodiment FIG. 1 is a conceptual diagram showing a non-contact power feeding system of an elevator according to the embodiment. The non-contact power supply system is a system in which power is supplied to the car K in an elevator in a non-contact manner. In the present embodiment, the non-contact power feeding system uses magnetic field resonance, which is a kind of magnetic field coupling, to supply power to the car K, and includes a conductor wire 1 and a power receiving coil 2.

The conductor wire 1 is a conductor wire that generates a magnetic field for feeding (alternating magnetic field). In the present embodiment, the conductor wire 1 is arranged in a state of being hung downward in a U-shape in the hoistway. Therefore, the conductor wire 1 is formed with a pair of hanging portions 10A and 10B that hang down linearly. Then, when alternating current flows through the conductor wire 1, a magnetic field for feeding (alternating magnetic field) is generated around the hanging portions 10A and 10B.

Further, in the present embodiment, the conductor wire 1 has a circular cross section or a shape close to it (see FIG. 2). The conductor wire 1 may be appropriately changed to one having a rectangular cross section or one having a flat cross section as long as it can generate a magnetic field for feeding. Further, as the conductor wire 1, in consideration of ease of handling at the time of wiring and the like, a conductor wire 1 may be used which is made flexible by knitting a thin wire (for example, a flat braided wire).

The power receiving coil 2 is a coil that receives electric power from the conductor wire 1 by magnetic field coupling, and is provided in the car K. In the example of FIG. 1, the power receiving coil 2 is provided at a position facing any of the pair of hanging portions 10A and 10B on the top surface of the car K. The installation position of the power receiving coil 2 is not limited to the top surface of the car K, and may be appropriately changed to another position (side surface or bottom surface of the car K) capable of magnetic field coupling with the conductor wire 1. ..

Then, in the non-contact power feeding system of the present embodiment, the energy of the magnetic field generated in the conductor wires 1 (a pair of hanging portions 10A and 10B) is transmitted to the power receiving coil 2 by using the magnetic field resonance to the car K. Power is supplied in a non-contact manner. According to the power supply using such magnetic field resonance, when the distance between the conductor wire 1 (a pair of hanging portions 10A and 10B) and the power receiving coil 2 is relatively large (for example, in the case of several tens of cm to several m). ) However, it is possible to realize power supply to the car K by coupling them with a magnetic field. Therefore, even if the car K and the conductor wire 1 are shaken so as to approach each other, the conductor wire 1 (a pair of hanging portions 10A) is prevented from coming into contact with the car K and the power receiving coil 2. And 10B) and the power receiving coil 2 can be adjusted.

However, the conductor wire 1 may also have fluctuations such that the distance between the pair of hanging portions 10A and 10B changes, and such fluctuations of the conductor wire 1 may cause a magnetic field for feeding, a resonance frequency, or the like. Since it changes, it can greatly affect the power supply efficiency.

Therefore, the non-contact power feeding system of the present embodiment includes a holder 3 in order to suppress the shaking of the conductor wire 1 such that the distance between the pair of hanging portions 10A and 10B changes (see FIG. 1). .. Here, the holder 3 is an instrument used by being attached to the conductor wire 1, and holds a pair of hanging portions 10A and 10B with a predetermined interval Lt between them. The non-contact power feeding system of the present embodiment is provided with a plurality of holders 3 as shown in FIG. 1, and the holders 3 are attached to a plurality of positions of the conductor wire 1 in the moving direction Dm of the car K. There is. Hereinafter, the details of the holder 3 will be described.

FIG. 2 is a perspective view showing the holder 3. FIG. 3 is a perspective view showing a state in which the holder 3 is attached to the conductor wire 1. As shown in FIG. 2, the holder 3 has a first arm portion 31, a second arm portion 32, a hinge portion 33, and a locking portion 34. Further, the holder 3 is preferably made of a non-magnetic material so as not to be heated by electromagnetic induction due to a magnetic field (alternating magnetic field) generated around the conductor wire 1.

The first arm portion 31 and the second arm portion 32 are portions for sandwiching the pair of hanging portions 10A and 10B. In the present embodiment, the first arm portion 31 and the second arm portion 32 are connected to each other so as to be openable and closable by a hinge portion 33, and have surfaces 31a and 32a that are close to or in contact with each other and face each other when closed, respectively. is doing. Two semicircular grooves 310A and 310B are formed on the surface 31a of the first arm portion 31 with a predetermined interval Lt between them. Further, on the surface 32a of the second arm portion 32, two grooves 320A and 320B recessed in a semicircle are formed with a predetermined interval Lt between them. Moreover, the grooves 320A and 320B are arranged at positions facing the grooves 310A and 310B when the holder 3 is closed, respectively.

Therefore, when the holder 3 is closed (see FIG. 3), the two opposing grooves 310A and 320A form one round hole 30A through which the droop 10A passes. Further, the two opposed grooves 310B and 320B form one round hole 30B through which the hanging portion 10B passes. Moreover, these two holes 30A and 30B are formed with a predetermined interval Lt between them. The shapes of the grooves 310A and 320A and the shapes of the grooves 310B and 320B can be appropriately changed according to the cross-sectional shape of the conductor wire 1.

The locking portion 34 is for fixing the first arm portion 31 and the second arm portion 32 in a closed state. Specifically, the locking portion 34 is composed of a flexible portion 341 and a claw portion 342. Here, the flexible portion 341 is formed at the tip end portion of the first arm portion 31 so as to cover the tip end surface 32b of the second arm portion 32 when the holder 3 is closed (see FIG. 3). It is possible to flex in a direction away from the tip surface 32b. The claw portion 342 is projected onto the flexible portion 341 so as to be hooked on the corner 32c of the tip portion of the tip portion of the second arm portion 32 opposite to the first arm portion 31 when the holder 3 is closed. ing.

According to such a holder 3, it can be attached to the conductor wire 1 as follows. First, with the holder 3 opened, a pair of hanging portions 10A and 10B are passed through the grooves 320A and 320B of the second arm portion 32 (or the grooves 310A and 310B of the first arm portion 31, respectively). See Figure 2). After that, when the holder 3 is closed, the above-mentioned two holes 30A and 30B are formed in a state where a pair of hanging portions 10A and 10B are passed through them, respectively (see FIG. 3). Moreover, the two holes 30A and 30B are formed with a predetermined interval Lt between them. Therefore, the distance between the pair of hanging portions 10A and 10B passed through these two holes 30A and 30B, respectively, is also maintained at a predetermined distance Lt at the mounting position of the holder 3.

Further, in the process of closing the holder 3, the claw portion 342 rides on the tip surface 32b of the second arm portion 32, so that the flexible portion 341 bends in a direction away from the tip surface 32b. As a result, a force is applied to the claw portion 342 to return the claw portion 342 to the original position (the position when the flexible portion 341 is not flexed). Then, when the first arm portion 31 and the second arm portion 32 are close to each other or come into contact with each other (that is, when the holder 3 is closed), the claw portion 342 reaches the corner 32c of the second arm portion 32. Then, it is released from the state of riding on the tip surface 32b of the second arm portion 32 and returns to the original position. As a result, the claw portion 342 is caught on the corner 32c of the second arm portion 32, and as a result, the first arm portion 31 and the second arm portion 32 are fixed in a closed state.

Further, in the present embodiment, the holes 30A and 30B are formed so that their inner diameters are smaller than the diameter of the conductor wire 1. Therefore, in order to pass the pair of hanging portions 10A and 10B through the holes 30A and 30B, respectively, when the holder 3 is attached to the conductor wire 1, the hanging portions 10A and 10B are inserted into the grooves 310A and 310B and the grooves 320A and 320B, respectively. Each must be pushed in and fitted. As a result, in the state in which the holder 3 is attached to the conductor wire 1 (see FIG. 3), the holder 3 is fixed to the conductor wire 1 by fitting the hanging portions 10A and 10B into the holes 30A and 30B. That is, the holder 3 holds the pair of hanging portions 10A and 10B with a predetermined interval Lt between them, and by holding the pair of hanging parts 10A and 10B, the holder 3 itself is also held by the pair of hanging parts 10A and 10B.

According to the non-contact power feeding system of the present embodiment, in a simple configuration including the holder 3 as described above, the distance between the pair of hanging portions 10A and 10B is maintained at a predetermined distance Lt by the holder 3. Therefore, it becomes easy to suppress the shaking of the conductor wire 1 such that the distance between the pair of hanging portions 10A and 10B changes, and as a result, the influence on the feeding efficiency that may occur due to the shaking of the conductor wire 1. Is more likely to be prevented. Then, as shown in FIG. 1, by attaching the holders 3 to a plurality of positions of the conductor wire 1 in the moving direction Dm of the car K, the pair of hanging portions 10A covers the entire area of the conductor wire 1 in the moving direction Dm. And the interval between 10B can be maintained at a predetermined interval Lt.

Further, according to the holder 3 (see FIG. 2) described above, the pair of hanging portions 10A and 10B are passed through the two grooves 320A and 320B (or the grooves 310A and 310B), although the structure is simple. By a simple operation such as closing the holder 3 from the conductor (that is, sandwiching the hanging parts 10A and 10B between the holders 3), at the same time as attaching the holder 3 to the conductor wire 1, the pair of hanging parts 10A and 10B are attached to them. It can be held with a predetermined interval Lt between them.

[2] Modification Example [2-1] First Modification Example FIG. 4 is a conceptual diagram showing a non-contact power feeding system of an elevator according to the first modification. As shown in FIG. 4, the non-contact power feeding system may further include an auxiliary line 4 arranged in the hoistway. Here, the auxiliary wire 4 is a wire having a relatively high strength (such as a wire), and is fixed to the ceiling or floor of the hoistway, a rail bracket attached to the guide rail, or the like, so that the pair of hanging portions 10A And 10B are stretched up and down side by side. Therefore, the auxiliary wire 4 itself hardly shakes as compared with the conductor wire 1 and the car K.

Then, in the example of FIG. 4, a plurality of holders 3 for holding the pair of hanging portions 10A and 10B are attached to the auxiliary line 4 and are connected to each other via the auxiliary line 4. As an example, each holder 3 is attached to the auxiliary wire 4 by fixing its hinge portion 33 to the auxiliary wire 4. Each holder 3 may be attached to the auxiliary wire 4 by fixing the tip of the first arm portion 31 or the second arm portion 32 to the auxiliary wire 4.

In this way, by attaching the holder 3 to the auxiliary wire 4 that hardly shakes and connecting the holders 3 to each other, the holder 3 itself becomes less likely to shake, and as a result, the conductor held by the holder 3 is held. On line 1, shaking in the direction approaching the car K (that is, shaking that may cause a collision with the car K) is suppressed.

When the holder 3 is attached to one auxiliary wire 4, the holder 3 may rotate around the auxiliary wire 4 due to the twist of the auxiliary wire 4. Therefore, in order to prevent such rotation, the non-contact power feeding system is provided with two auxiliary wires 4 described above, and both ends of the holder 3 (hinge portion 33 and the first) are attached to the two auxiliary wires 4. The tip portion of the arm portion 31 or the second arm portion 32) may be fixed, respectively.

[2-2] Second Modified Example FIGS. 5 (A) and 5 (B) are views showing two examples of the holder 3 as a second modified example. As shown in FIG. 5A, the inner surface of the groove 310A of the first arm portion 31 may be provided with a flange-shaped protrusion 35 extending in the circumferential direction along the inner surface. Further, a similar protrusion 35 may be provided on the inner surface of the groove 320A of the first arm portion 31. According to such a configuration, when the holder 3 is attached to the conductor wire 1, the protrusion 35 can be made to bite into the pair of hanging portions 10A and 10B passed through the grooves 310A and 310B. Then, when the protrusions 35 bite into the hanging portions 10A and 10B, the holder 3 is less likely to slip off along the conductor wire 1, and the holder 3 is firmly fixed to the conductor wire 1. The same protrusion 35 can also be provided in the grooves 320A and 320B of the second arm portion 32.

Alternatively, as shown in FIG. 5B, serrated protrusions 36 arranged in the circumferential direction may be provided on the inner surfaces of the grooves 310A and 320A constituting the holes 30A of the holder 3. Further, similar protrusions 36 may be provided on the inner surfaces of the grooves 310B and 320B constituting the holes 30B of the holder 3. According to such a configuration, when the holder 3 is attached to the conductor wire 1, the protrusion 36 can be made to bite into the pair of hanging portions 10A and 10B passed through the holes 30A and 30B. Then, when the protrusions 36 bite into the hanging portions 10A and 10B, the holder 3 is less likely to slip off along the conductor wire 1, and the holder 3 is firmly fixed to the conductor wire 1.

The shape of the protrusions that bite into the pair of hanging portions 10A and 10B is not limited to those shown in FIGS. 5A and 5B, and may be appropriately other shapes that can prevent the holder 3 from falling. May be changed.

[2-3] Third Modified Example FIGS. 6 (A) and 6 (B) are views showing two other examples of the holder 3 as a third modified example. As shown in these figures, the holder 3 may not have the hinge portion 33, and in such a configuration, the first arm portion 31 and the second arm portion are provided by the following means. The 32 can be fixed in close proximity to or in contact with each other. As the first means, as shown in FIG. 6A, locking portions 34 are provided at both ends of the first arm portion 31, and the second arm portion 32 is embraced by the two locking portions 34. The second arm portion 32 is fixed to the first arm portion 31 by hooking the claw portions 342 on both the left and right corners of the second arm portion 32. As a second means, as shown in FIG. 6B, both ends of the first arm portion 31 and the second arm portion 32 are bound by a band 37 instead of the locking portion 34.

[2-4] Fourth Modified Example In the holder 3 described above, as shown in FIG. 2, grooves through which the pair of hanging portions 10A and 10B pass are formed in both the first arm portion 31 and the second arm portion 32. However, it may be changed to one formed only on either one of the first arm portion 31 and the second arm portion 32. Whether or not such a change is possible depends on whether or not the conductor wire 1 can be inserted into the groove (that is, the cross-sectional shape of the conductor wire 1). For example, the cross-sectional shape of the conductor wire 1 is a quadrangle. In this case, as shown in FIG. 7, since the groove can be formed with a constant width in the depth direction, even when the groove is formed only in either the first arm portion 31 or the second arm portion 32. , The conductor wire 1 can be inserted into the groove. In the example of FIG. 7, a case where the grooves 320A and 320B are formed only in the second arm portion 32 corresponding to the conductor wire 1 having a rectangular cross-sectional shape is shown.

[2-5] Other Modifications The configuration of each part of the non-contact power supply system described above is not limited to an elevator that supplies power to the car K using magnetic field resonance, but uses electromagnetic induction, which is a type of magnetic field coupling. It can also be applied to elevators that supply power to the car K.

The description of the embodiments and modifications described above should be considered exemplary in all respects and not restrictive. The scope of the invention is shown by the claims, not by the embodiments or modifications described above. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope of the claims.

1 Conductor wire 2 Power receiving coil 3 Holder 4 Auxiliary wire K Car cage 10A, 10B Hanging 30A, 30B Hole 31 First arm part 31a Surface 32 Second arm part 32a Surface 32b Tip surface 32c Square 33 Hinge part 34 Locking part 35, 36 Protrusion 37 Band Dm Movement direction Lt Predetermined spacing 310A, 310B, 320A, 320B Groove 341 Flexible part 342 Claw part

Claims (5)

It is a non-contact power supply system that supplies power to the car in an elevator in a non-contact manner.
A conductor wire that generates a magnetic field for feeding, and has a pair of hanging portions that hang down in the hoistway.
A power receiving coil provided in the car and receiving electric power from the conductor wire by magnetic field coupling,
A holder that holds the pair of hangings at a predetermined interval between them, and a holder.
Elevator contactless power supply system. Equipped with multiple holders
The non-contact power feeding system for an elevator according to claim 1, wherein the pair of hanging portions is held by the holder at a plurality of positions of the conductor wire in the moving direction of the car. Further provided with auxiliary lines arranged in the hoistway,
The non-contact power feeding system for an elevator according to claim 2, wherein the plurality of holders for holding the pair of hangings are connected to each other via the auxiliary line. The holder has a first arm portion and a second arm portion for sandwiching the pair of hanging portions.
Claims 1 to 2, in which at least one of the first arm portion and the second arm portion is formed with two grooves through which the pair of hanging portions are passed, with the predetermined distance between them. The elevator non-contact power supply system according to any one of 3. The non-contact power feeding system for an elevator according to claim 4, wherein the inner surface of the groove is provided with a protrusion that cuts into the hanging portion that is passed through the groove.

Images