JP2007088953A - Document management and storage cabinet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a document management and storage cabinet in which a great quantity of documents can be collectively read and written by switching antennas in a time division manner and setting a magnetic field at a central position between neighboring antennas to a minimum magnetic field strength or more communicable with an RF tag. <P>SOLUTION: A document management and storage cabinet 300 of the present invention comprises: a storage unit 301 wherein a plurality of documents are stored side by side; at least antennas 30, 32, 34, 37 provided in the storage unit 301 to exchange radio waves for reading/writing information recorded on an RF tag (non-contact information recording medium) 200; a switching unit (switching means) 42 for selecting any one of the antennas 30, 32, 34, 37; a reader/writer 100 for performing carrier power transmission based on a predetermined modulation/demodulation system and data exchange with the RF tag 200; and a PC (control means) 50 for controlling the switching unit 42 and the reader/writer 100. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a document management storage, and more particularly, to a configuration technology of a storage that collectively reads and writes management information of a document 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, the unit to be managed is a file unit, and it was not possible to manage each document bound to the file. Therefore, even if the file is managed correctly, the contents document is pulled out. I couldn't manage what I lost or lost. The reason for this is that the cost of the RF tag is high, and if each document is attached one by one, the cost of the entire system increases, and when an RF tag is attached to each document, a general resonance type RF tag is in proximity. Because the mutual inductance of the RF tag antenna changes, the total inductance of the RF tag antenna changes, the resonance point shifts, and the maximum power cannot be obtained. For example, assuming that the level obtained when the resonance frequency is 13.56 MHz as shown in FIG. 11 is V1 (FIG. 11 (a)), the level at 13.56 MHz is changed by shifting the resonance point to 14 to 15 MHz. The voltage drops to V2 (FIG. 11 (b)).
Therefore, recently, in order to cover the reduction in power due to the shift of the resonance point, a stacked RF tag has been developed and commercialized. That is, the stacked RF tag is designed so that the resonance point is designed in advance from 13.56 MHz to a higher resonance point so that the maximum power can be obtained at the higher resonance point (ISO 18000-3 mode 2 ST type). ). In addition, since a large number of RF tags are read and written at a time, there is a limit to the amount of power that a single reader / writer antenna can supplement. Therefore, in order to limit the number of RF tags that can be read and written in a batch, power control is performed to randomly select several tens of RF tags that are normally random from the LOW RF tags (patents). Reference 1).
In Patent Document 1, an antenna of an IC card receives a transmission write signal and a transmission pulse signal from a writing / reading device, generates a reception writing signal and a reception pulse signal, and the control device receives only in response to normal power. The write signal is written to the storage device as data, the data is read from the storage device, and the state control device counts the count of the count signal generated by counting the pulses of the received pulse signal, and the random number signal of the random number signal from the random number generator Set low power mode when not equal, set normal power mode when not, power supply controller gives low power to controller when in low power mode, normal power to controller when not A data write / read system configured in To have.
JP 2002-74280 A

However, in the conventional technique disclosed in Patent Document 1, there is a limit to the number of data that can be read / written from / to the RF tag by one reader / writer at a time. There was a problem that it was necessary to read and write separately and the operation was troublesome.
In view of such a problem, the present invention can batch read and write a large amount of documents by switching antennas in a time-sharing manner and by setting the magnetic field at the center position between adjacent antennas to be equal to or higher than the minimum magnetic field strength capable of communicating with the RF tag. The purpose is to provide a document management storage.

In order to solve the above problems, the present invention provides a document management storage for managing and storing a document to which a non-contact information recording medium is attached, the storage unit storing a plurality of the documents side by side, At least two or more antennas provided in the storage unit for transmitting and receiving radio waves for reading and writing information recorded in the non-contact information recording medium; and switching means for selecting any one of the antennas; A reader / writer for transmitting carrier power and exchanging data based on a predetermined modulation / demodulation method with a non-contact information recording medium, and a control unit for controlling the switching unit and the reader / writer. The antennas are arranged adjacent to each other so that the lines of magnetic force radiated from each antenna face each other, and the magnetic field at the center position between the antennas is the lowest magnetic field that can read and write information recorded on the noncontact information recording medium Characterized in that it is arranged to be equal to or greater than the strength.
The present invention assumes the use of a general bookshelf type storage unit. The most characteristic feature of the present invention is that the antennas are arranged such that the magnetic field at the center position between the antennas is equal to or higher than the minimum magnetic field strength at which information recorded on the non-contact information recording medium can be read and written. Thereby, a stable magnetic field strength can always be supplied.
According to a second aspect of the present invention, the positional relationship between the antenna and the non-contact information recording medium is arranged such that magnetic lines of force radiated from the antenna intersect with a loop antenna constituting the non-contact information recording medium. To do.
Communication between the reader / writer and the non-contact information recording medium is possible when the magnetic field lines radiated from the antenna penetrate the loop antenna. Furthermore, when the magnetic field lines are orthogonal to the loop antenna of the non-contact information recording medium, radio waves are transmitted most efficiently.

According to a third aspect of the present invention, the antenna includes an antenna cover for holding the antenna, at least one loop coil, and a magnetic force line shielding portion made of a magnetic material.
When the antennas are arranged back to back, the magnetic field lines radiated from them circulate so as to penetrate the loop coil of the antenna. Therefore, when two antennas are arranged back to back, the magnetic field lines radiated from the loop coil give a magnetic field to the adjacent RF tags. Therefore, in the present invention, a magnetic field line shielding part such as ferrite is provided between two loop coils housed in the antenna cover so that the magnetic field lines radiated from each loop coil are directed in one direction via the magnetic field line shielding part. Is.
According to a fourth aspect of the present invention, the antenna also serves as a partition plate of the storage unit.
The antenna is housed in the antenna cover. Therefore, if the antenna cover is made of a non-magnetic material, it is configured as a single plate in appearance, so that it can also be used as a partition plate for partitioning documents.
According to a fifth aspect of the present invention, the antenna is disposed substantially perpendicular to the bottom plate of the storage unit.
The most common form of storing documents is to place a partition plate (antenna) substantially perpendicular to the bottom plate of the storage section like a bookcase.

According to a sixth aspect of the present invention, the antenna is disposed substantially parallel to the bottom plate of the storage unit.
As another form of storing documents, a partition plate (antenna) is arranged in parallel to the bottom plate of the storage unit, and documents are stacked between two partition plates (antennas).
According to a seventh aspect of the present invention, the antenna includes an antenna that is substantially orthogonal to a bottom plate of the storage unit and an antenna that is parallel to the antenna.
As another form of storing documents, a partition plate (antenna) perpendicular to the bottom plate of the storage unit is combined with a partition plate (antenna) in parallel. As a result, documents can be stored vertically or stacked.
According to an eighth aspect of the present invention, the non-contact information recording medium is a stacked RF tag or a stacked IC card.
When reading and writing information on multiple RF tags or IC cards, the mutual inductance of the RF tag antenna changes, so the total inductance of the RF tag antenna changes, the resonance point shifts, and the maximum power may not be obtained. there were. Therefore, in the present invention, a large number of documents can be processed at once by attaching a stacked RF tag or a stacked IC card to the stored documents.
According to a ninth aspect of the present invention, at least one pressing plate for correcting the posture of the document is provided so that magnetic field lines from the antenna are orthogonal to a loop antenna of a non-contact information recording medium attached to the document. .
When storing documents composed of soft paper one by one, the document will be bent over time due to the influence of the surrounding environment (humidity, etc.), and the orientation of the RF tag attached to it will be It will not face the antenna. As a result, the magnetic field lines are not orthogonal to the loop antenna of the RF tag. Therefore, in the present invention, a document pressing plate is provided to correct the posture of the document.

According to the first aspect of the present invention, the two or more antennas are arranged adjacent to each other so that the magnetic lines of force radiated from each antenna face each other, and the magnetic field at the center position between the antennas reads and writes information recorded on the non-contact information recording medium. Since it is arranged so as to have a minimum possible magnetic field strength, the number of documents that can be processed at a time can be at least doubled.
Further, in claim 2, the positional relationship between the antenna and the non-contact information recording medium is arranged such that the magnetic lines of force radiated from the antenna are orthogonal to the loop antenna of the non-contact information recording medium. It is possible to penetrate the loop antenna efficiently.
According to a third aspect of the present invention, since the antenna includes an antenna cover for holding the antenna, at least one loop coil, and a magnetic force line shielding portion made of a magnetic material, the antenna can be efficiently only in one direction from the loop coil. Magnetic field lines can be emitted.
According to the fourth aspect of the present invention, since the antenna also serves as a partition plate for the storage unit, the configuration of the storage unit is simplified and the overall cost can be reduced.
According to the fifth aspect of the present invention, since the antenna is disposed substantially perpendicular to the bottom plate of the storage unit, it is possible to store the document upright, and it is easy to insert and remove the necessary document from the document.

According to the sixth aspect of the present invention, since the antenna is disposed substantially parallel to the bottom plate of the storage unit, it is possible to sequentially stack the documents and to prevent the documents from being bent by their own weight.
According to the seventh aspect of the present invention, since the antenna is composed of an antenna substantially orthogonal to the bottom plate of the storage unit and an antenna parallel to the antenna, it is possible to store documents upright and store them in a stacked manner. , Variations in storage methods are widened.
Further, since the non-contact information recording medium is a stacked RF tag or a stacked IC card, information recorded on a large number of non-contact information recording media can be reliably read and written.
Further, in claim 9, since at least one holding plate for correcting the posture of the document so that the magnetic lines of force from the antenna are orthogonal to the loop antenna of the non-contact information recording medium attached to the document, the document to be stored upright is provided. Can be corrected so that the magnetic field lines are not orthogonal to the loop antenna of the non-contact information recording medium.

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.

Next, before explaining the operation of the document management storage according to the embodiment of the present invention, parts common to each embodiment will be described first.
FIG. 3A is a diagram illustrating the antenna interval according to the present invention. For example, when the distance between the antennas 95 and 97 is determined, the distance between the loop coils 96 and 98 is substantially determined. Here, it is assumed that the distance between the loop coils 96 and 98 is y, and the distance at which the magnetic field at the center position of the loop coils 96 and 98 is equal to or greater than the minimum magnetic field strength at which information recorded in the RF tag 200 can be read and written is y1 and y2, respectively. Of course, since y1 = y2, the distance y is determined so that either y = y1 + y2 or y <y1 + y2 is satisfied. FIG. 3B is a diagram showing the relationship between the power of the magnetic field radiated from the loop coil and the distance. The vertical axis represents the magnetic field strength, and the horizontal axis represents the distance from the loop coil. If the maximum magnetic field strength of the loop coil is Pmax, and the minimum magnetic field strength that can read and write information recorded on the RF tag 200 is Pmin, the magnetic field strength attenuates geometrically with distance. Then, the distances y1 and y2 are determined so that the intersection of the intensity curve R of the magnetic field radiated from the loop coil 96 and the intensity curve Q of the magnetic field radiated from the loop coil 98 becomes Pmin. Accordingly, the distance y is inevitably determined as y = y1 + y2 or y <y1 + y2.

Next, the configuration of the document and the antenna will be described. FIG. 4 is a view showing the appearance of a typical document stored in the document management storage of the present invention. A document content 111 is printed or written on the document 110. The RF tag 200 described with reference to FIG. 2 in which information relating to the document is recorded is attached to a portion that is not printed or written. In the present invention, it is assumed that the RF tag 200 is attached to all documents. The attachment position of the RF tag 200 may be anywhere, but it is preferable to attach it to the same place in consideration of workability.
FIG. 5 is a diagram for explaining an antenna 30 (FIG. 5A) at the left end of FIG. 6 and an antenna 32 (FIG. 5B) at the center as an example. The antenna 30 includes an antenna cover 31c for holding the antenna, one loop coil 31, and a ferrite core (magnetic field shielding portion) 31a made of a magnetic material. According to this configuration, the magnetic lines 31b radiated from the loop coil 31 pass through the ferrite core 31a with almost no attenuation and are radiated only to the right side of the loop coil 31 as shown by the broken line. The antenna 32 includes an antenna cover 33f for holding the antenna, two loop coils 33a and 33b, and a ferrite core (magnetic line shield) 33c made of a magnetic material. The ferrite core 33c is located between the two loop coils 33a and 33b. According to this configuration, the magnetic lines 33d radiated from the loop coil 33a pass through the ferrite core 33c with almost no attenuation and are radiated only to the left side of the loop coil 33a as shown by the broken line. The magnetic lines 33e radiated from the loop coil 33b pass through the ferrite core 33c with almost no attenuation and are radiated only to the right side of the loop coil 33b as shown by the broken line. As described above, the antenna of the present invention is configured to radiate magnetic field lines only in a necessary direction.

  FIG. 6 is an external perspective view of the document management storage according to the first embodiment of the present invention. In the following description, a case where the RF tag 200 is attached to a document will be described. The document management storage 300 includes a storage unit 301 that stores a plurality of documents side by side, and a radio wave that is provided in the storage unit 301 and that reads and writes information recorded on an RF tag (non-contact information recording medium) 200. A predetermined modulation / demodulation method is used between the RF tag 200 and at least the antennas 30, 32, 34, and 37 to be exchanged, the switch (switching means) 42 that selects any one of the antennas 30, 32, 34, and 37. A reader / writer 100 that performs transmission of carrier power and data transmission / reception, and a PC (control means) 50 that controls the switch 42 and the reader / writer 100 are configured. The detailed configuration of the antennas 30, 32, 34, and 37 will be described later. The antennas 30 and 37 on both sides are provided with one loop coil 31 and 38, and the antennas 32 and 34 are looped back to back. Coils 33a, 33b, 35a, and 35b are provided. In the present embodiment, the antennas 30, 32, 34, and 37 are disposed substantially perpendicular to the bottom plate 302 of the storage unit 301. The antennas 30, 32, 34, and 37 are also used as partition plates for the storage unit 301. Further, a groove 39 is formed in the bottom plate between the antennas 34 and 37, and a pressing plate 36 for correcting the posture of a document (not shown) is provided in the groove 39, but it may be provided in another place or may be omitted. Each antenna is fixed by the back plate 303. The signal of the switch 42 is connected from the signal line 41 to the antenna 30 by 41a, the antenna 32 is connected by 41b, the antenna 34 is connected by 41c, and the antenna 37 is 41d is connected. A signal to the switch 42 is input through a signal line 43 of the reader / writer 100, and the reader / writer 100 is controlled by the control line 45 by the PC 50. Further, the PC controls the switch 42 by the control line 44.

  Next, the operation of the document management storage according to the first embodiment of the present invention shown in FIG. 6 will be described. In the document management storage of this embodiment, the document 110 is stored upright in the storage unit 301 as shown in FIG. Here, the document 110 is stored between the antennas 30 and 32 without a gap, the document 110 is stored between the antennas 32 and 34 with a small number of documents 110, and the document 110 is stored between the antennas 34 and 37. A state in which the posture is corrected on the left side by the pressing plate 36 is shown. Now, an operation for processing information of documents stored between the antennas in such a storage state will be described with reference to FIG. FIG. 9 is a functional block diagram of the document management storage according to the first embodiment of the present invention. The same components will be described with the same reference numerals as in FIG. Since the present invention is not an invention related to a stacked RF tag, description of power control of the RF tag will be omitted, and description will mainly be made regarding the configuration of the document management storage of the present invention. Further, in FIG. 9, only a part of the loop coil is illustrated, and the others are omitted.

  First, in the initial state, the PC 50 uses the control line 44 to connect the contact point position of the switch 42 between pa as shown in the figure. As a result, information from the reader / writer 100 flows to the loop coil 31 via the signal line 41 a and returns to the reader / writer 100 via the return line 46. As a result, about half of the documents 110 between the antennas 30 and 32 are sequentially read. When the PC 50 has finished reading about half of the document 110, the control line 44 connects the contact points of the switch 42 between p and b. As a result, information from the reader / writer 100 flows to the loop coil 33a via the signal line 41b and returns to the reader / writer 100 via the return line 46. As a result, the remaining half of the documents 110 between the antennas 30 and 32 are sequentially read. Similarly, the PC 50 connects the contact position of the switch 42 between pc via the control line 44. As a result, information from the reader / writer 100 flows to the loop coil 33b via the signal line 41c and returns to the reader / writer 100 via the return line 46. As a result, about half of the documents 110 between the antennas 32 and 34 are sequentially read. When the PC 50 has read about half of the document 110, the control line 44 connects the contact positions of the switch 42 between pd. As a result, information from the reader / writer 100 flows to the loop coil 35a via the signal line 41d, and returns to the reader / writer 100 via the return line 46. As a result, the remaining half of the documents 110 between the antennas 32 and 34 are sequentially read. If there is no remaining document, the next loop coil is switched and the same operation is repeated. If the document 110 stored between the antennas 32 and 34 in FIG. 10A is bent and stored, the magnetic field lines radiated from the loop coil may not penetrate the loop antenna of the RF tag 200. Therefore, in this embodiment, the document 110 is pressed by the pressing plate 36 as between the antennas 34 and 37 so that the antennas 34 and 37 and the document 110 face each other. The pressing plate 36 may be slid left and right. FIG. 10 (d) is a diagram of a modified example of the document management storage according to the first embodiment of the present invention shown in FIG. The document management storage 301a is installed upside down with the same configuration as the document management storage according to the first embodiment of the present invention shown in FIG. In this case, since the document 110 is stacked by its own weight, there is an advantage that the document is not bent and accordingly the pressing plate 36 is not required.

  FIG. 7 is an external perspective view of a document management storage according to the second embodiment of the present invention. The document management storage 310 includes a storage unit 311 that stores a plurality of documents side by side and a radio wave that is provided in the storage unit 311 and that reads and writes information recorded in an RF tag (non-contact information recording medium) 200. At least the antennas 60, 62, 64, 67, 69, 71 for sending and receiving, the switcher (switching means) 42 for selecting any one of the antennas 60, 62, 64, 67, 69, 71, and the RF tag 200 And a reader / writer 100 that performs transmission and reception of carrier power based on a predetermined modulation / demodulation method, and a PC (control means) 50 that controls the switch 42 and the reader / writer 100. The detailed configuration of the antennas 60, 62, 64, 67, 69, 71 is the same as that shown in FIG. 6, but the loop coils 61, 63, 65, 66 are included in the antennas 60, 62, 64, 67, 69, 71, respectively. , 68 and 70 are provided one by one. In the present embodiment, the antennas 60, 62, 64, 67, 69, 71 are arranged substantially parallel to the bottom plate of the storage unit 311. Further, the antennas 60, 62, 64, 67, 69, 71 are configured to also serve as upper and lower partition plates of the storage unit 311. Each antenna is fixed by the back plate 312 and the partition plates 313, 314, 315, and 316. The signal of the switch 42 is connected from the signal line 41 to the antenna 60 by 41a, and the antenna 62 is connected by 41b. 64 is connected by 41c, the antenna 67 is connected by 41d, the antenna 69 is connected by 41e, and the antenna 71 is connected by 41f. A signal to the switch 42 is input through a signal line 43 of the reader / writer 100, and the reader / writer 100 is controlled by the control line 45 by the PC 50. Further, the PC controls the switch 42 by the control line 44.

Next, the operation of the document management storage according to the second embodiment of the present invention shown in FIG. 7 will be described. In the document management storage of this embodiment, the documents 110 are stacked and stored in the storage unit 311 as shown in FIG. Now, in such a storage state, an operation for processing information of documents stored between the antennas will be described. When the antennas are arranged above and below, the switching order of the switch 42 for switching the loop coils is switched in the order of the loop coils 61, 66, 63, 68, 65, 70.
FIG. 8 is an external perspective view of a document management storage according to the third embodiment of the present invention. The document management storage 320 is a combination of the antenna shown in FIG. 6 arranged substantially perpendicular to the bottom plate and the antenna shown in FIG. 7 arranged substantially parallel to the bottom plate. Therefore, the same reference numerals are used for the respective antennas.
Next, the operation of the document management storage according to the third embodiment of the present invention shown in FIG. 8 will be described. In the document management storage of this embodiment, as shown in FIG. 10C, the documents 110 are stored upright in the A part of the storage part 321, stacked and stored in the B part, and stacked in the C part. Contained. Now, in such a storage state, an operation for processing information of documents stored between the antennas will be described. In the case of part A, information is read and written by the antennas 30 and 32, in the case of part B], information is read and written by the antennas 62 and 69, and in the case of part C, information is read and written by the antennas 64 and 71. In this case, the order in which the switch 42 switches the loop coil is switched in the order of the loop coils 31, 33a, 63, 68, 65, and 70.

As described above, according to the present invention, two or more antennas are arranged adjacent to each other so that the lines of magnetic force radiated from each antenna face each other, and the magnetic field at the center position between the antennas can read and write information recorded on the RF tag 200. Since it is arranged so as to have the minimum magnetic field strength or more, the number of documents that can be processed at a time can be at least doubled.
In addition, the positional relationship between the antenna and the RF tag 200 is arranged so that the magnetic lines radiated from the antenna are orthogonal to the loop antenna of the RF tag 200, so that the magnetic lines radiated from the antenna can penetrate the loop antenna efficiently. Can do.
Moreover, since the antenna includes an antenna cover for holding the antenna, at least one loop coil, and a ferrite core made of a magnetic material, the magnetic field lines can be efficiently radiated from the loop coil only in one direction. Can do.
Further, since the antenna also serves as a partition plate for the storage unit, the configuration of the storage unit is simplified and the overall cost can be reduced.
In addition, since the antenna is disposed substantially perpendicular to the bottom plate of the storage unit, it is possible to store documents upright and to easily insert and remove necessary documents from the documents.
Further, since the antenna is disposed substantially parallel to the bottom plate of the storage unit, the documents can be stacked one after another, and the document can be prevented from being bent by its own weight.
In addition, since the antenna is composed of an antenna that is substantially orthogonal to the bottom plate of the storage unit and an antenna that is parallel, it is possible to store documents upright and store them in a stacked manner. Wide variations.
Further, since the RF tag 200 is a stacked RF tag or a stacked IC card, information recorded on a large number of RF tags 200 can be read and written reliably.
In addition, since at least one holding plate 36 for correcting the posture of the document is provided so that the magnetic field lines from the antenna are orthogonal to the loop antenna of the RF tag 200 attached to the document, the standing document is bent and the magnetic field lines are folded. Can be corrected to be not orthogonal to the loop antenna of the RF tag 200.

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). (A) is a figure explaining the antenna space | interval of this invention, (b) is a figure showing the relationship between the power and distance of the magnetic field radiated | emitted from a loop coil. It is a figure which shows the external appearance of the typical document accommodated in the document management storage of this invention. (A) is a figure explaining the antenna 30 in the left end of FIG. 6, (b) is a figure explaining the antenna 32 in the center part of FIG. It is an external appearance perspective view of the document management storage which concerns on the 1st Embodiment of this invention. It is an external appearance perspective view of the document management storage which concerns on the 2nd Embodiment of this invention. It is an external appearance perspective view of the document management storage which concerns on the 3rd Embodiment of this invention. It is a functional block diagram of the document management storage which concerns on the 1st Embodiment of this invention. (A) is a figure which shows the storage state of the document in the document management storage of the 1st Embodiment of this invention, (b) shows the storage state of the document in the document management storage of the 2nd Embodiment of this invention. FIG. 4C is a diagram illustrating a storage state of documents in the document management storage according to the third embodiment of the present invention. FIG. 4D is a storage of documents in the document management storage according to the first modified embodiment of the present invention. It is a figure which shows a state. It is a figure explaining the operation | movement from which a resonance point shifts | deviates by the influence of a mutual inductance.

Explanation of symbols

  30, 32, 34, 37 Antenna, 42 Switching device, 50 PC, 200 RF tag, 100 Reader / writer, 300 Document management storage, 301 Storage unit

Claims (9)

A document management storage for managing and storing documents attached with a non-contact information recording medium,
A storage section for storing a plurality of documents side by side; at least two or more antennas provided in the storage section for transmitting and receiving radio waves for reading and writing information recorded on the non-contact information recording medium; and the antennas Switching means for selecting any one of the above, a reader / writer for transmitting and receiving carrier power based on a predetermined modulation / demodulation method with the non-contact information recording medium, and controlling the switching means and the reader / writer Control means for
Two or more antennas are arranged adjacent to each other so that the lines of magnetic force radiated from each antenna face each other, and the magnetic field at the center position between the antennas exceeds the minimum magnetic field strength capable of reading and writing information recorded on the non-contact information recording medium. Document management storage characterized by being arranged to become.   2. The positional relationship between the antenna and the non-contact information recording medium is arranged such that magnetic lines of force radiated from the antenna intersect with a loop antenna constituting the non-contact information recording medium. Document management storage as described.   The document management according to claim 1 or 2, wherein the antenna includes an antenna cover for holding the antenna, at least one loop coil, and a magnetic field line shielding portion made of a magnetic material. Storage.   4. The document management storage according to claim 1, wherein the antenna also serves as a partition plate of the storage unit.   5. The document management storage according to claim 1, wherein the antenna is disposed substantially perpendicular to a bottom plate of the storage unit.   5. The document management storage according to claim 1, wherein the antenna is disposed substantially parallel to a bottom plate of the storage unit.   5. The document management storage according to claim 1, wherein the antenna includes an antenna that is substantially orthogonal to a bottom plate of the storage unit and an antenna that is parallel to the antenna.   8. The document management storage according to claim 1, wherein the non-contact information recording medium is a stacked RF tag or a stacked IC card.   6. The press antenna according to claim 5, further comprising at least one pressing plate for correcting the posture of the document so that a magnetic field line from the antenna intersects a loop antenna of a non-contact information recording medium attached to the document. Document management storage.

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