JP2007318890A - Non-contact feeder system for automatic door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact feeder system for automatic doors capable of supplying the power of an external power supply to various kinds of sensors attached to a door side and a control unit in a non-contact system sufficiently in an automatic door. <P>SOLUTION: The non-contact feeder system for automatic doors supplies the power of the external power supply provided at a transom side to equipment attached to a door side in a non-contact system, and has a feeding section provided at the transom side and a charge section provided at the door side. The feeding section has a high-frequency oscillation circuit connected to the external power supply and a feeding coil to which a cylindrical magnetic body core is mounted. The charge section has a charge coil that is an air-core coil. When no power is supplied, the feeding coil is separated from the charge one. When power is supplied, the feeding coil to which the cylindrical magnetic body core is mounted can be loaded into the power receiving coil that is the air-core coil. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a non-contact power feeding device for an automatic door for supplying electric power in a non-contact manner to various sensors and control devices mounted on the door side for safe operation of the automatic door.

  The structure of an automatic door (hereinafter also referred to as an automatic door) is configured as shown in FIG. That is, a door (hereinafter also referred to as a door) 4 and 5 is suspended through a slide roller 2 and 3 on a seamless (hereinafter also referred to as a channel or a base) 1 fixed to the building side, A belt 8 is stretched by pivoting pulleys 6 and 7 on both ends of the belt. The lower part of the belt 8 is engaged with the door 4 and the upper part of the belt 8 is engaged with the door 5, and the pulleys 6 are rotated by the motor unit 9 to open and close the doors 4 and 5. The control is performed by the touch switch 10 or the proximity switch.

  When the door is controlled to open and close by rotating the pulley 6 by the motor unit 9, the doors 4 and 5 do not move completely smoothly but move with some vibration. Therefore, in order to prevent the doors 4 and 5 from coming into contact with the mesh 1 and being damaged, the mesh 1 and the doors 4 and 5 are not in close contact with each other. A certain amount of gap is provided between them.

  Here, in an automatic door that controls the opening and closing of a door using a sensor attached to the door, such as a touch switch, as a method of supplying power to the sensor attached to the door which is a movable part, a helical as used in a telephone device is used. There was only a method of using the cord 12 or contacting the trolley wire like a train. However, the wiring 11 has a problem in that failure is likely to occur because the door is frequently opened and closed.

  As a method for solving the above problem, for example, there is a method described in Patent Document 1. This is provided with a battery in the door, and the door is controlled to be opened and closed by transmitting a touch signal of a touch switch as an optical signal to an invisible light receiving control device by an oscillation device provided on the door side. In the case of using the method described in Patent Document 1, it is not necessary to supply power from an external power source. However, considering a sensor mounted on the door side for safe operation, power consumption increases. Therefore, there arises a problem that the capacity of the battery needs to be increased or the battery needs to be replaced frequently.

In this way, the development of a non-contact power supply device for automatic doors that can solve the above problems and can supply power from an external power source in a non-contact manner to various sensors and control devices mounted on the door side is desired. Has been.
Japanese Utility Model Publication No. 63-28835 Takashi Urano, “Non-contact charger unit”, Product Hotline magazine “TDK NOW”, TDK Corporation, Volume 22, January 1997

  On the other hand, in recent years, for example, as described in Non-Patent Document 1, there is a non-contact power supply device (non-contact charger unit) that employs an electromagnetic induction method. The principle of this non-contact type charger unit, that is, the principle of the non-contact power feeding device adopting the electromagnetic induction method (non-contact charging principle) will be described with reference to FIG.

  That is, as shown in FIG. 7, when a power supply (alternating voltage) is input to the power transmission coil, an alternating magnetic flux is generated, and an induced electromotive force is generated in the receiving coil by the penetrating magnetic flux in accordance with Faraday's law. This is a method of receiving power by (load resistance). However, in addition to the effective magnetic flux that contributes to the active power in the receiving coil at this time, there is also a magnetic flux that leaks into the air and becomes ineffective.

  Thus, how to reduce the reactive magnetic flux is an important point for increasing the transmission power efficiency by the electromagnetic induction method. That is, it is important to reduce the distance between the power transmission coil and the power reception coil (the gap between the power transmission and reception coils, that is, the distance between the non-contact portions) as much as possible (in the meantime, the non-contact type described in Non-contact Literature 1). In the charger unit, the distance between the power transmission coil and the power reception coil is 6 mm). In other words, if the gap between the power transmission coil and the power reception coil is increased to some extent (for example, greater than 6 mm), the transmission power efficiency may be reduced, and the power supply function may not be performed sufficiently.

  Then, it is examined whether the non-contact electric power feeder which employ | adopted the electromagnetic induction system which was disclosed by the nonpatent literature 1 is applicable to an automatic door. When the non-contact power supply device of Non-Patent Document 1 is applied to an automatic door, that is, a power transmission unit including a power transmission coil, a ferrite core, and an external power source is attached to the unsightly side of the automatic door. The power receiving unit including the core and the load is attached to the door of the automatic door.

  In general, the gap between the blind and the door in the automatic door is larger than the preferable non-contact portion distance (for example, 6 mm) described in Non-Patent Document 1, and therefore the gap is not necessarily constant in the closed state of the door. Therefore, even if a non-contact power feeding device adopting an electromagnetic induction method as disclosed in Non-Patent Document 1 is applied to an automatic door, there is a possibility that the power feeding function cannot be sufficiently performed. There is a problem that it is very large.

  The present invention has been made under the circumstances as described above, and the object of the present invention is to provide sufficient power for an external power source in a non-contact manner to various sensors and control devices mounted on the door side in an automatic door. It is providing the non-contact electric power feeder for automatic doors which can be supplied to.

  The present invention relates to a non-contact power feeding device for an automatic door for supplying electric power of an external power source provided on the non-contact side to a device attached to the door side in a non-contact manner. A power supply unit provided on the eye side and a charging unit provided on the door side, the power supply unit including a high-frequency oscillation circuit connected to the external power supply, a power supply coil mounted with a cylindrical magnetic core, The charging unit is achieved by including a charging coil that is an air-core coil.

  Further, the above object of the present invention is such that, when power feeding is not performed, the power feeding coil and the charging coil are separate, and when power feeding is performed, the cylindrical magnetic core is mounted. The power feeding coil is configured to be inserted into the power receiving coil that is an air-core coil, or the power feeding unit and the power receiving unit further resonate with the oscillation frequency of the high frequency oscillation circuit. This is achieved more effectively by providing a capacitor, by using a cylindrical ferrite core as the cylindrical magnetic core, or by using a Hartley oscillation circuit as the high-frequency oscillation circuit.

  With the use of the non-contact power supply device for automatic doors according to the present invention, it is possible to sufficiently and stably supply power from an external power source in a non-contact manner to various sensors and control devices mounted on the door side. There is an effect.

  In other words, if the present invention is applied to an automatic door, there is no need for power supply wiring to follow opening and closing of the door for supplying power to various sensors and control devices mounted on the door side from an external power source. Even when opening and closing, the automatic door can be used safely and conveniently without causing a failure due to the power supply wiring.

  The non-contact power feeding device for an automatic door according to the present invention includes various sensors and control devices (hereinafter, referred to as “automatic doors”) mounted on the door side for safe operation of the automatic door from an external power source provided on the blind side. For the sake of brevity, various sensors and control devices mounted on the door side are also simply referred to as loads), and are used to supply power in a non-contact manner.

  Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

  A case (Example 1) in which the non-contact power feeding device for an automatic door of the present invention is applied to an automatic door of a double door will be described with reference to FIGS. That is, in the automatic door of the double door to which the automatic door non-contact power feeding device of the present invention is applied, FIG. 1 schematically shows a state when the door is open, and FIG. 2 shows a state where the door is moved and closes. Is shown schematically.

  The non-contact power feeding device for an automatic door according to the present invention includes a power feeding unit provided on the unsightly side of the automatic door and a power receiving unit provided on the door side (door side) of the automatic door.

  Specifically, as can be seen from FIGS. 1 and 2, the power feeding unit includes a high-frequency oscillation circuit 101 connected to an external power source 100 provided on the unillustrated side and a cylindrical magnetic core (in this example). And a feeding coil 103 on which a cylindrical ferrite core 104) is mounted.

  As shown in FIGS. 1 and 2, each door is provided with a power receiving unit including a power receiving coil 105 that is an air-core coil that does not have a magnetic core mounted thereon. Specifically, the power receiving unit is provided at the upper end of the door. A coil 105 is attached. When viewed from the side, the power receiving coil 105, which is an air-core coil, has a donut shape.

  The power supply by the non-contact power supply device for automatic doors of the present invention is performed when the door is closed as shown in FIG. The power supply according to the present invention is basically performed based on a non-contact power feeding method employing an electromagnetic induction method.

  In other words, the power of the external power supply 100 attached to the invisible side, which is a fixed part of the automatic door, is supplied via the high-frequency oscillation circuit 101 to the power supply coil 103 in which the cylindrical ferrite core 104 is mounted, and the automatic part of the automatic door. Through the power receiving coil 105 attached to the upper ends of the doors 4 and 5, power is supplied to a load 107 attached to the door, that is, various sensors and control devices attached to the door.

  That is, since the power feeding coil 103 mounted with the cylindrical ferrite core 104 and the power receiving coil 105 attached to the door overlap as shown in FIG. 2 and electromagnetically induced when power is supplied, power transmission efficiency is good. More specifically, the power feeding unit and the charging unit are not in contact with each other when the power is supplied by the non-contact power feeding device for an automatic door according to the present invention.

  In the present invention, in order to resonate with the oscillation frequency of the high-frequency oscillation circuit 101, a resonance capacitor 102 can be provided in each of the power supply unit and the power reception unit (see FIGS. 1 and 2). Thus, by providing the capacitor for resonating with the oscillation frequency of the high-frequency oscillation circuit of the power supply unit, the efficiency of power supply by the non-contact power supply device for automatic doors of the present invention is further improved.

  Further, as shown in FIGS. 1 and 2, in the present invention, a rectifier circuit 106 may be provided in the charging unit. In other words, the power from the external power supply 100 may be rectified and then supplied to the load 107.

  As described above, the present invention can be applied not only to an automatic door of a double door but also to an automatic door of a single door.

  Next, a case (Example 2) in which the non-contact power feeding device for an automatic door according to the present invention is applied to an automatic door of a one-way door will be described with reference to FIGS. That is, in the automatic door of the one-way door to which the automatic door non-contact power feeding device of the present invention is applied, FIG. 3 schematically shows a state when the door is open, and FIG. 4 shows a state where the door is moved and closes. Is shown schematically.

  Basically, the structure and power supply principle of the present invention applied to the second embodiment are the same as those of the first embodiment. However, since this is an automatic door with a single-sided door, there is only one door. When applied, only one charging unit is sufficient. In the case of the first embodiment, when feeding power (when the door is closed), the feeding coil 103 mounted with the cylindrical ferrite core 104 overlaps with the two charging coils 105 attached to the two doors. The length of the columnar ferrite core 104 is longer than that in the second embodiment. In other words, the length of the cylindrical ferrite core used in the case of the second embodiment may be half that of the first embodiment.

  In the contactless power supply device for automatic doors of the present invention, it is preferable to use the Hartley oscillation circuit shown in FIG. 5 as the high frequency oscillation circuit 101. However, the high frequency oscillation circuit used in the present invention is limited to the Hartley oscillation circuit. Needless to say, other types of oscillation circuits can be used.

  In the first embodiment and the second embodiment described above, the most characteristic feature of the non-contact power feeding device for an automatic door according to the present invention is that the automatic door to which the present invention is applied is configured to supply power when the door is closed. As shown in FIGS. 2 and 4, a power receiving coil 103 in which a power supply coil 103 mounted with a cylindrical magnetic core (preferably using a cylindrical ferrite core) is an air-core coil is used. I am going to put it in 105.

  In addition, specific embodiment of this invention is not limited to Example 1 and Example 2, For example, if the installation position of the electric power feeding part provided in the unsightly side of an automatic door is changed appropriately, for example, If the power feeding part is installed not on the unsightly part corresponding to the position where the door is closed as in Example 1 and Example 2, but on the unsighted part corresponding to the position where the door is opened, when the door is opened Electric power can be supplied.

  That is, in the present invention, when power feeding is not performed, the power feeding coil 103 and the charging coil 105 are separated. However, when power feeding is performed, the power receiving coil 105 that is an air-core coil has a cylindrical magnetic shape. A power supply coil 103 mounted with a body core is wrapped around.

  Therefore, even if there is a slight gap between the feeding coil 103 and the charging coil 105, sufficient feeding can be performed. That is, when the present invention is applied to an automatic door, power can be stably and sufficiently supplied in a non-contact manner.

It is a schematic diagram for demonstrating the case (Example 1) when the non-contact electric power feeder for automatic doors which concerns on this invention is applied to the automatic door of a double door. It is a schematic diagram for demonstrating the case (Example 1) when the non-contact electric power feeder for automatic doors which concerns on this invention is applied to the automatic door of a double door. It is a schematic diagram for demonstrating the case (Example 2) when the non-contact electric power feeder for automatic doors which concerns on this invention is applied to the automatic door of a one-way door. It is a schematic diagram for demonstrating the case (Example 2) when the non-contact electric power feeder for automatic doors which concerns on this invention is applied to the automatic door of a one-way door. It is a figure which shows one specific example of the high frequency oscillation circuit of the non-contact electric power feeder for automatic doors which concerns on this invention. It is a schematic diagram which shows the structure of the conventional automatic door. It is a schematic diagram for demonstrating the principle of the non-contact-type charger unit which employ | adopted the conventional electromagnetic induction system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seamless 2, 3 Slide roller 4, 5 Door 6, 7 Pulley 8 Belt 9 Motor unit 10 Touch switch 11 Wiring 12 Helical cord 13 Motor control circuit 100 External power supply 101 High frequency oscillation circuit 102 Resonance capacitor 103 Feed coil 104 Ferrite core 105 Power receiving coil 106 Rectifier circuit 107 Load

Claims (5)

A non-contact power feeding device for an automatic door for supplying the power of an external power source provided on the unsighted side to equipment mounted on the door side in a non-contact manner,
It is composed of a power feeding unit provided on the unsighted side and a charging unit provided on the door side,
The power supply unit includes a high-frequency oscillation circuit connected to the external power source, and a power supply coil mounted with a cylindrical magnetic core,
The said charging part is provided with the charging coil which is an air core coil, The non-contact electric power feeder for automatic doors characterized by the above-mentioned.   When power feeding is not performed, the power feeding coil and the charging coil are separated, and when power feeding is performed, the power feeding coil on which the cylindrical magnetic core is mounted is an air-core coil. The non-contact electric power feeder for automatic doors of Claim 1 comprised so that it might put in the said receiving coil.   The non-contact power feeding device for an automatic door according to claim 2, wherein the power feeding unit and the power receiving unit are further provided with a capacitor for resonating with an oscillation frequency of the high frequency oscillation circuit.   The non-contact power feeding device for an automatic door according to claim 2 or 3, wherein the columnar magnetic core is a columnar ferrite core.   The non-contact power feeding device for an automatic door according to any one of claims 2 to 4, wherein a Hartley oscillation circuit is used as the high-frequency oscillation circuit.

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