JP2007310740A - Magnetic flux generator, and article management and storage device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic flux generator which can accurately read information from RF tags arranged at both ends also by keeping a part of loop coils wound around respective adjacently arranged basic antennas intersecting with each other to form boundary antennas, and by bending magnetic materials at ends of the respective basic antennas adjacently arranged with the respective boundary antennas between at right angles, and to provide an article management and storage device using the magnetic flux generator. <P>SOLUTION: The magnetic flux generator 110 comprises: basic antennas 33, 35 and 37 with loop coils wound around tabular magnetic materials; boundary antennas 34, 36 arranged at boundaries between the respective adjacently arranged basic antennas 33, 35 and between the basic antennas 35, 37; two side plates 31, 39 arranged so as to be orthogonal to the respective basic antennas 33, 37; and a base plate 38 for fixing thereto the basic antennas 33, 35 and 37, the boundary antennas 34, 36, and the side plates 31, 39. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a magnetic flux generation device and an article management storage device, and more particularly to a configuration technology of a storage device that collectively reads and writes management information of an article to which a stacked RF tag is attached.

  Traditionally, in institutions and facilities that manage and store large amounts of documents, such as government offices, companies, etc., in order to automatically manage and store files for organizing and storing documents accurately and without human error, Attempts have been made to automate file management by attaching an RF tag to each file and recording the management information of the file on the RF tag. However, in such a system, documents are managed in units of files, and it was not possible to manage each document bound to the file. Therefore, it is assumed that the location of the file itself was accurately managed. However, it was impossible to meticulously manage that the documents inside were missing or lost.

  In view of this, a file shelf has been developed in which antennas are embedded in the partition plates of the file shelf, and the recorded information of the RF tags attached to the documents sandwiched between the partition plates is read at once. However, since the intensity of the radio wave is regulated by the Radio Law, the file shelf cannot be separated by a predetermined distance or more. Therefore, there is a problem that partition plates are necessarily required at regular intervals, and the configuration of the file shelf is complicated accordingly.

Patent Document 1 discloses a reader / writer antenna and an article management system that can read information on an IC tag regardless of the orientation of the IC tag attached to the article. According to this, the reader / writer antenna includes a plurality of antenna parts configured by arranging loop antennas in a chain, and the plurality of antenna parts are arranged on the same plane and shifted in the chaining direction. Has been.
JP 2006-025363 A

  However, the prior art disclosed in Patent Document 1 is that, among the files stored in the management shelf, the files stored at both ends in the file array direction are weak because the magnetic flux radiated from the reader / writer antenna is weak. There is a problem that cannot be read correctly.

  In view of such problems, the present invention configures a boundary antenna so that a part of the loop coil wound around each adjacent basic antenna intersects each other, and each adjacently disposed across the boundary antenna. A magnetic flux generator capable of accurately reading information on RF tags arranged at both ends in the arrangement direction of the file by using a configuration in which the magnetic material at the end of the basic antenna is bent at a substantially right angle, and article management using the same An object is to provide a storage device.

In order to solve such a problem, the present invention provides a magnetic flux generator for generating a magnetic flux penetrating a loop antenna of a non-contact information recording medium attached to an article, wherein a loop coil is wound around a magnetic material. At least two basic antennas, at least one boundary antenna disposed at a boundary between each of the adjacent basic antennas, and two side plates disposed to be orthogonal to the respective basic antennas, The boundary antenna has a configuration in which a loop coil is wound around a magnetic material, and the loop coil crosses the lead wire from the terminal end of the loop coil constituting the adjacent basic antennas or the lead wire from the start end. The side plate is made of a magnetic material magnetically connected to the magnetic material of the basic antenna. To.
The magnetic flux generator of the present invention has a bookshelf shape without a partition plate, and includes a plurality of basic antennas having a basic shape on the back surface, and a boundary antenna for correcting a magnetic flux weakening region at the boundary of each basic antenna. . In order to reinforce the magnetic flux on both sides, both side plates are made of a magnetic material. In addition, the magnetic flux generator may have a basic antenna disposed on the bottom surface.

According to a second aspect of the present invention, conductors for blocking magnetic flux radiated from the magnetic material constituting each of the basic antennas are arranged at both ends of the magnetic material constituting the boundary antenna.
The boundary antenna has a lead wire at the end or start of an adjacent basic antenna wound around it. Therefore, when a current flows through the loop coil of the basic antenna, a magnetic flux is inevitably generated in the magnetic materials of the basic antenna and the boundary antenna. The magnetic flux flows into the magnetic material of the adjacent basic antenna where no current flows, and disturbs the original magnetic flux route. Therefore, in the present invention, conductors are arranged at both ends of the magnetic material constituting the boundary antenna to block the magnetic path of this unnecessary magnetic flux.

According to a third aspect of the present invention, the positional relationship between the basic antenna and the boundary antenna and the non-contact information recording medium is such that the magnetic flux radiated from the basic antenna and the boundary antenna is the non-contact information recording medium. The magnetic flux radiated from forms a magnetic path that radiates from the end of the magnetic material and returns to the end. Therefore, it is optimal to cross the loop antenna constituting the non-contact information recording medium so that the magnetic flux is orthogonal.

According to a fourth aspect of the present invention, a conductor for preventing leakage of magnetic flux to a space adjacent to the outside of the magnetic material of the side plate is provided.
When the side plate is made of a magnetic material, the magnetic flux may leak from the magnetic material to the outside. When other magnetic flux generators are arranged adjacent to each other, the leaked magnetic flux passes through the adjacent magnetic flux generator and disturbs the data, or conversely, the data is generated by the magnetic flux from the adjacent magnetic flux generator. There is a risk of being disturbed. Therefore, in the present invention, in order to prevent the magnetic flux from leaking from the magnetic material, a conductor is provided outside the side plate to block the magnetic flux.

Claim 5 is an article management storage device for managing and storing an article attached with a non-contact information recording medium, wherein the magnetic flux generator according to claim 1, 2, or 3 and any one of the basic antennas are provided. An antenna selection means for selecting, a reader / writer for transmitting and receiving carrier power based on a predetermined modulation / demodulation method between the contactless information recording medium, and a control means for controlling the antenna selection means and the reader / writer And.
The article management storage device of the present invention sequentially selects and switches the basic antennas constituting the magnetic flux generation device of the present invention, and manages the information read at that time by the control means. This apparatus can accurately manage all the articles stored in the magnetic flux generator.

According to a sixth aspect of the present invention, the non-contact information recording medium is an RF tag or an IC card.
An RF tag or an IC card is most suitable as a recording medium for receiving and receiving information by receiving a change in a magnetic field or radio waves, and performing information contactlessly. In particular, since the magnetic flux can be efficiently passed through the RF tag or the IC card, it is effective for a laminated RF tag or a laminated IC card that does not have a resonance characteristic with a large minimum operating magnetic field strength.

  According to the present invention, a book shelf shape without a partition plate is provided, and a plurality of basic antennas having a basic shape are provided on the back surface, and boundary antennas for correcting a magnetic flux weakening region are provided at the boundaries of the basic antennas. In order to reinforce the magnetic flux, the both side plates are made of a magnetic material, so that the magnetic field strength can be made substantially constant over the entire area of the magnetic flux generator.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .
FIG. 1 is a block diagram showing a configuration of a general reader / writer. The reader / writer 100 is controlled by a PC 50 that exchanges data with the reader / writer 100 and controls the entire system. The reader / writer 100 includes a transmission / reception device 1 that controls a data communication protocol with an external PC 50, a control device 2 that controls the operation of the entire reader / writer 100, firmware that records a procedure for operating the control device 2, and read data A memory device 3 for storing data, a modulator 4 for modulating data from the control device 2 on a carrier wave, an input device 5 for inputting an operation command, and a display device 6 for displaying information controlled by the control device 2 A power amplifier 7 that amplifies the power supply signal that is an AC signal from the control device 2 and a write command from the modulator 4, and a detector demodulator that converts the carrier wave received from the loop antenna 9 into binary data 8 and a loop antenna 9 for exchanging power and data with an IC card (RF tag) (not shown). .

  Next, before describing the operation of the reader / writer 100 according to this configuration, the configuration of the IC card (RF tag) will be described first. FIG. 2 is a block diagram showing the configuration of the IC card (RF tag) of the present invention. The IC card (RF tag) 200 of this embodiment includes an antenna 20 that transmits and receives data using a power carrier wave from the reader / writer 100, a transmission / reception circuit 21 that generates a write command read command, and a power carrier wave from the antenna 20. Power generation circuit 22 that rectifies and converts it into DC power, a memory device 23 that manages storage of control firmware and data, and a modulator 24 that modulates a transmission command from the control circuit 26 with a carrier wave. And a detector 25 for converting the carrier wave data from the transmission / reception circuit 21 into binary data, and a control circuit 26 for controlling the entire operation of the IC card (RF tag) 200.

  Next, each operation will be described with reference to FIGS. 1 and 2 together. When a power supply (not shown) is turned on, the reader / writer 100 starts an operation according to a program stored in the memory device 3 after the initial operation of the control device 2. First, initialization is performed. Next, the control device 2 alternately transmits a power supply signal to be supplied to the IC card (RF tag) 200 and a polling signal from the power amplifier 7. The signal is radiated to the outside from the loop antenna 9 as an electromagnetic wave. Next, when the IC card (RF tag) 200 comes close to the reader / writer 100, the antenna 20 receives a power supply signal, rectifies the carrier wave by the power generation circuit 22 and converts it to DC power, and then converts it into the RF tag. To all circuits. When power is supplied and the control circuit 26 is driven, control is started in accordance with a program stored in the memory device 23.

  Next, the control circuit 26 first demodulates the command from the transmission / reception circuit 21 by the detector 25, converts it to a binary signal, and analyzes the command. As a result, when it is recognized that it is called, the response is modulated by the modulator 24 and transmitted from the antenna 20 via the transmission / reception circuit 21. The reader / writer 100 receives this response with the loop antenna 9, converts it into a binary code with the detector demodulator 8, analyzes it with the control circuit 2, and the IC card (RF tag) 200 conforms to the standard IC card ( RF tag). Thereby, polling is performed between the reader / writer 100 and the IC card (RF tag) 200 thereafter.

  FIG. 3 is an external configuration diagram of the magnetic flux generator of the present invention. The magnetic flux generator 110 includes a boundary antenna disposed at the boundary between the basic antennas 33, 35, and 37 in which a loop coil is wound around a plate-shaped magnetic material, and the adjacent basic antennas 33, 35, and 35, 37. 34, 36, two side plates 31, 39 arranged orthogonal to the respective basic antennas 33, 37, the basic antennas 33, 35, 37, the boundary antennas 34, 36 and the bottom plate 38 for fixing the side plates 31, 39. And comprising. The boundary antennas 34 and 36 are formed by winding a loop coil around a magnetic material so that the terminal ends of the loop coils wound around the adjacent basic antennas 33, 35 and 35, 37 cross each other. It is configured by turning (details will be described later). The side plates 31 and 39 are made of a magnetic material that is magnetically connected to the magnetic materials of the basic antennas 33, 35, and 37. Accordingly, the magnetic flux radiated from each antenna is radiated from the side plate 39 toward the side plate 31 as indicated by an arrow 40 in the figure, for example, and there is an RF tag 200 attached to the file 32 in the meantime. Can be read from any of the basic antennas. That is, if the file 32 is in the magnetic flux generator 110, information can be read anywhere. In the present embodiment, the number of files 32 is one, but any number of files 32 can be used as long as they can be stored in the magnetic flux generator 110. In that case, since the magnetic flux can be efficiently passed through the RF tag or the IC card, it is effective for a laminated RF tag or a laminated IC card that does not have a resonance characteristic with a large minimum operating magnetic field strength.

  In this embodiment, the magnetic materials of the side plates 31 and 39 and the magnetic materials of the basic antennas 33 and 37 are individually configured, but may be integrated. The magnetic flux generator 110 may have a basic antenna disposed on the bottom surface (in the bottom plate 38). Moreover, you may make it provide the conductor which prevents the leakage of the magnetic flux to adjacent space to the B surface of the side plate 31 and the A surface of the side plate 39 so that it may contact | adhere.

FIG. 4 is a schematic diagram showing the flow of magnetic flux for explaining the operation of the magnetic flux generator of the present invention. (A) is a figure showing the magnetic flux for the comparison with a prior art example, (b) is a distribution diagram of the magnetic field intensity formed by the magnetic flux of (a), (c) is a figure showing the magnetic flux of this invention, ( d) is a distribution diagram of the magnetic field strength formed by the magnetic flux of (c).
As shown in FIG. 4A, in the conventional magnetic flux generator, loop coils A, B, and C are individually wound around a magnetic material 46 such as ferrite, and a current is supplied to each loop coil by a reader / writer (not shown). , Magnetic fluxes a, b, and c are generated. FIG. 4B schematically shows the intensity of the magnetic field in the magnetic flux generator at this time. That is, when the vertical axis corresponds to the magnetic field strength and the horizontal axis corresponds to each position of the magnetic material 46, the magnetic field strength P varies as 41 to 44 at the boundary of each magnetic material 46. If there is, there is a possibility that a reading error occurs because the magnetic field strength is weak. By providing a correction loop coil at the boundary of each loop coil, the magnetic field strength can be increased to some extent as shown by the broken line Q, but the magnetic field strength cannot be corrected at both ends 41 and 44 yet.

Therefore, in the present invention, as shown in FIG. 4C, loop coils A, B, and C are individually wound around magnetic materials 33, 35, and 37 such as ferrite, and magnetic materials 34 and 36 are provided at the boundaries. The lead wire from the end of the loop coil A arranged adjacent to the magnetic material 34, 36 and the lead wire from the start of the loop coil B are connected so as to cross each other, and the lead wire from the end of the loop coil B and the loop are connected. The connection is made so that the lead wires from the start end of the coil C intersect (details will be described later). In addition, the magnetic materials 31 and 39 are magnetically connected to the ends of the magnetic materials 33 and 37 at a right angle.
From this state, when a current is applied to each loop coil by a reader / writer (not shown), magnetic fluxes a, b, and c are generated. The magnetic field strength in the magnetic flux generator at this time is schematically shown in FIG. That is, when the vertical axis corresponds to the magnetic field strength and the horizontal axis corresponds to each position of the magnetic material, the magnetic field strength P becomes a substantially flat magnetic field strength over the entire area of each magnetic material. This is because the magnetic path is formed by the magnetic materials 31 and 39 at both ends, and the magnetic flux returning from the ends to the magnetic materials 33 and 37 is formed, so that the strength of the magnetic field is rather increased. In other regions, fluctuations can be corrected by the effect of the boundary magnetic materials 34 and 36.

FIG. 5 is a diagram for explaining the configuration of each antenna constituting the magnetic flux generator of the present invention. (A-1) is an external configuration diagram of a basic antenna, (a-2) is a schematic diagram thereof, (b-1) is an external configuration diagram of a boundary antenna, (b-2) is a schematic diagram thereof, and (c-1) ) Is an external configuration diagram when the basic antenna and the boundary antenna are combined, (c-2) is a schematic diagram thereof, (d) is a plan view when the basic antenna and the boundary antenna of (c-1) are combined, ( e) is a schematic diagram thereof.
The basic antenna 60 of the present invention is configured by winding a loop coil 61 around a magnetic material 62. The figure shows a case where the loop coil 61 is wound three times. In general, the loop coil 61 is formed on a substrate as a printed pattern, and is connected by a connector so as to sandwich a magnetic material 62 such as a ferrite core. The boundary antenna 63 has a configuration in which loop coils 61a and 61b are wound around a magnetic material 65. The loop coils 61a and 61b constitute adjacent basic antennas 60 as described in (c-1). The lead wire 66 from the terminal end of the loop coil 61a or the lead wire 67 from the starting end is connected to be crossed. Further, in (b-1), the conductors 64 for blocking the magnetic flux radiated from the magnetic material 62 constituting each basic antenna 60 are arranged at both ends of the magnetic material 65 constituting the boundary antenna 63. The conductor 64 may not be disposed.

Next, the operation of the boundary antenna of the magnetic flux generator of the present invention will be described with reference to FIGS. As an example, a basic configuration of two adjacent basic antennas 60a and 60b and a boundary antenna 63a arranged at the boundary will be described.
The basic configuration of the magnetic flux generator of the present invention is composed of two adjacent basic antennas 60a and 60b and one boundary antenna 63a arranged at the boundary thereof. Then, the loop coil 61a wound around the left magnetic material 62a is wound around the right side of the magnetic material 65 of the boundary antenna 63a by the lead wire 66 extending from the end thereof. Further, the loop coil 61b wound around the right magnetic material 62b is wound around the left side of the magnetic material 65 of the boundary antenna 63a by the lead wire 67 extending from the starting end. Thereby, the lead wire 66 from the terminal end of the loop coil 61a or the lead wire 67 from the start end of the loop coil 61b constituting the adjacently arranged basic antennas 60a and 60b is connected and configured to cross each other.

  When a current flows in the loop coil 61a, a magnetic flux is generated in the left magnetic material 62a, and a current also flows in the loop coil 61a of the boundary antenna 63a via the lead wire 66. Will occur. As a result, the magnetic flux a as described with reference to FIG. When a current flows through the loop coil 61b, a magnetic flux is generated in the magnetic material 62b on the right side, and a current flows through the loop coil 61b of the boundary antenna 63a via the lead wire 67. Will occur. As a result, the magnetic flux b as described in FIG. 4C is generated. Thus, a magnetic flux generator with a predetermined width can be configured by cascading the antennas having the basic configuration. The basic antennas and the boundary antennas are arranged at a predetermined interval, and are arranged so that the directions of magnetic flux are the same. In addition, providing the conductor 64 at the end of the boundary antenna 63 as shown in FIG. 5B-1 has the effect of steeply raising the direction of the magnetic flux at the boundary between the basic antenna and the boundary antenna.

  Next, the relationship between each basic antenna and the boundary antenna will be described with reference to FIG. The configuration of one antenna of the magnetic flux generator of the present invention is composed of a basic antenna and a boundary antenna. That is, the antenna A includes the basic antenna 60a constituted by the loop coil 61a and the loop coil 61a constituting the boundary antenna 63a adjacent to the right side, and the boundary antenna 63a adjacent to the left side by the basic antenna 60b constituted by the loop coil 61b. Up to the loop coil 61b that constitutes the antenna B, the antennas C and D are constructed in the same manner.

FIG. 5E shows the relationship between the loop coil and each magnetic material in a more easily understandable manner. That is, the loop coil 61a of the antenna A provided with the magnetic material 80 projecting at a right angle for changing the direction of the magnetic flux at the end is wound around the magnetic material 62a from the terminal A and crosses the magnetic material 65a. It is wound and formed between the terminals B. The loop coil 61b of the antenna B is formed between the terminals D by winding the magnetic material 62b so as to cross from the terminal C to the magnetic material 65a. Similarly, the loop coil 61c of the antenna C is formed between the terminals F by winding the magnetic material 62c so as to cross from the terminal E to the magnetic material 65b.
In this way, by forming the loop coils sequentially, a magnetic flux generator having an infinite interval can be configured theoretically.

  FIG. 6 is a block diagram of the article management and storage apparatus of the present invention. The article management and storage device 120 includes a magnetic flux generator 110 shown in FIG. 3, an antenna selector (antenna selection means) 70 for selecting any one of the basic antennas 33, 35, and 37, and an RF tag attached to the article. A control line 71 includes an R / W (reader / writer) 100 that transmits and receives carrier power based on a predetermined modulation / demodulation method, and an antenna selector 70 and R / W 100. And a PC (control means) 50 that controls the computer.

  Next, the operation of the article management storage device 120 will be described. In this description, a case where a document with an RF tag is stored in the magnetic flux generator 110 and the document is managed will be described. First, the PC 50 drives the antenna selector 70 to select the basic antenna 33 constituting the magnetic flux generator 110. As a result, the basic antenna 33 and the R / W 100 are electrically connected. Next, the R / W 100 is driven and a polling operation is performed according to the operation described with reference to FIGS. 1 and 2 to generate a magnetic flux in the magnetic flux generator 110. Thereby, the information of the RF tag 200 attached to the document is taken into the PC 50. Next, the PC 50 switches the basic antenna to 35 and performs the same operation as described above. Hereinafter, the information of the RF tag 200 attached to the document stored in the magnetic flux generator 110 is read while sequentially switching the basic antenna. Although the antenna selector 70 is switched in the order of arrangement of the basic antennas, it may be switched randomly. The tag attached to the document is a laminated RF tag or a laminated IC card.

  As described above, according to the present invention, a plurality of basic antennas 33, 35, 37 having a bookshelf shape without a partition plate and having a basic shape on the back surface are provided, and magnetic fluxes are formed at the boundaries of the basic antennas 33, 35, 37. Since the boundary antennas 34 and 36 for correcting the weakened area are provided and the side plates 31 and 39 are made of a magnetic material in order to reinforce the magnetic flux on both sides, the magnetic field strength is made substantially constant over the entire magnetic flux generator. be able to.

  Moreover, since the conductor 64 for interrupting the magnetic flux radiated from the magnetic material constituting each basic antenna is disposed at both ends of the magnetic material 65 constituting the boundary antenna 63, the boundary antenna 63 is connected to the adjacent basic antenna. Unnecessary magnetic flux can be blocked.

  Further, since the positional relationship between the basic antenna 60 and the boundary antenna 63 and the RF tag 200 is arranged so that the magnetic flux radiated from the basic antenna 60 and the boundary antenna 63 intersects with the loop antenna constituting the RF tag 200, The magnetic flux from the basic antenna 60 can be received most efficiently.

  Further, the basic antenna constituting the magnetic flux generator 110 of the present invention is sequentially selected and switched by the antenna selector 70, and the information read at that time is managed by the PC 50, so that the articles stored in the magnetic flux generator 110 can be accurately Can be managed.

It is a block diagram which shows the structure of a general reader / writer. It is a block diagram which shows the structure of an IC card (RF tag). It is an external appearance block diagram of a magnetic flux generator. (A) is a figure showing the magnetic flux for the comparison with a prior art example, (b) is a distribution diagram of the magnetic field intensity formed by the magnetic flux of (a), (c) is a figure showing the magnetic flux of this invention, ( d) is a distribution diagram of the magnetic field strength formed by the magnetic flux of (c). (A-1) is an external configuration diagram of a basic antenna, (a-2) is a schematic diagram thereof, (b-1) is an external configuration diagram of a boundary antenna, (b-2) is a schematic diagram thereof, and (c-1) ) Is an external configuration diagram when the basic antenna and the boundary antenna are combined, (c-2) is a schematic diagram thereof, (d) is a plan view when the basic antenna and the boundary antenna of (c-1) are combined, ( e) is a schematic diagram thereof. It is a block diagram of the article management storage device of the present invention.

Explanation of symbols

  33, 35, 37 Basic antenna, 34, 36 Boundary antenna, 31, 39 Side plate, 38 Bottom plate, 50 PC, 70 Antenna selector, 100 Reader / writer, 110 Magnetic flux generator, 120 Item management storage device, 200 RF tag

Claims (6)

A magnetic flux generator for generating a magnetic flux penetrating a loop antenna of a non-contact information recording medium attached to an article,
At least two basic antennas in which a loop coil is wound around a magnetic material;
At least one boundary antenna disposed at a boundary between each of the basic antennas disposed adjacent to each other;
Two side plates arranged to be orthogonal to each of the basic antennas,
The boundary antenna has a configuration in which a loop coil is wound around a magnetic material, and the loop coil intersects a lead wire from a terminal end of a loop coil or a lead wire from a start end constituting each of the adjacent basic antennas. Connected and configured as
The side plate is made of a magnetic material that is magnetically connected to the magnetic material of the basic antenna.   2. The magnetic flux generator according to claim 1, wherein a conductor for blocking magnetic flux radiated from the magnetic material constituting each basic antenna is disposed at both ends of the magnetic material constituting the boundary antenna.   The positional relationship between the basic antenna and the boundary antenna and the non-contact information recording medium is arranged such that the magnetic flux radiated from the basic antenna and the boundary antenna intersects with the loop antenna constituting the non-contact information recording medium. The magnetic flux generator according to claim 1 or 2, characterized by the above-mentioned.   4. The magnetic flux generator according to claim 1, wherein a conductor for preventing leakage of magnetic flux to a space adjacent to the outside of the magnetic material of the side plate is provided. An article management storage device for managing and storing articles with a non-contact information recording medium attached thereto,
Magnetic flux generator according to claim 1, 2, 3 or 4,
Antenna selecting means for selecting any one of the basic antennas;
A reader / writer for transmitting carrier power and transferring data based on a predetermined modulation / demodulation method with the non-contact information recording medium;
An article management storage device comprising: the antenna selection means and a control means for controlling the reader / writer.   6. The article management storage device according to claim 5, wherein the non-contact information recording medium is an RF tag or an IC card.

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