JP2005266961A - Radio tag reader/writer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio tag reader/writer capable of preventing occurrence of a writing error and incomplete data writing at the time of writing information to the radio tag after information of the radio tag is read and stored with a certain fixed amount put together. <P>SOLUTION: A storage casing 25 is provided for storing an envelope 20 to which a radio tag 13 is attached. A reading antenna 30 for reading information of the radio tag 13 in the storage casing 25 when the envelope 20 to which the radio tag 13 is attached is stored, and a writing antenna 31 for writing information to the radio tag 13 in the storage casing 25. Furthermore, a wave absorber 29 is provided that lets a readable area a in which the reading antenna 30 can read information of the radio tag 13 coincide with a writable area b in which the writing antenna 31 can write information to the radio tag 13 by intercepting a part of radio waves transmitted from the reading antenna 30. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a wireless tag read / write device that reads information from a wireless tag and writes information to the wireless tag.

  FIG. 6 is an explanatory diagram showing a conventional wireless tag system 1, and reading of information from the wireless tag 2 and writing of information to the wireless tag 2 performed using the wireless tag system 1 will be described.

  The wireless tag system 1 is a system that reads and writes information by wirelessly transmitting and receiving signals between the wireless tag 2 and the interrogator 3, and manages the read / written information. Used in fields such as distribution and distribution.

  The wireless tag 2 includes a wireless tag antenna 4 that performs transmission / reception of signals, a transmission / reception unit 5 that transmits / receives signals transmitted / received by the wireless tag antenna 4, and a memory 6 that stores electronic information. In addition, the interrogator 3 is connected to an antenna 7 that is provided outside or inside and handles transmission and reception of signals, and can transmit and receive signals to and from the wireless tag 2 wirelessly via the antenna 7. The interrogator 3 exchanges signals with the wireless tag 2 wirelessly, thereby reading information stored in the memory 6 of the wireless tag 2 from the interrogator 3 or reading information from the interrogator 3 in the memory 6 of the wireless tag 2. Or write to.

  6, the interrogator 3 and the management computer 5 are electrically connected via the communication network 8, for example, and the management computer 5 is connected to the interrogator as shown in FIG. 3 information is collected and managed.

  In the conventional wireless tag system 1 configured as described above, in order to read information stored in the wireless tag 2, first, a reading request is output from the interrogator 3 to the wireless tag 2. Then, the interrogator 3 outputs a read request as an electrical signal. The electrical signal output from the interrogator 3 is transmitted from the antenna 7 connected to the interrogator 3. When the electrical signal transmitted from the antenna 7 is received by the wireless tag antenna 4 on the wireless tag 2 side, the transmission / reception unit 5 receives the electrical signal received by the wireless tag antenna 4, and the transmission / reception unit 5 stores the information stored in the memory 6. read out. Then, the information read from the memory 6 by the transmission / reception unit 5 is output to the interrogator 3 as an electrical signal.

  The electric signal output from the transmission / reception unit 5 of the wireless tag 2 is transmitted to the wireless tag antenna 4 and transmitted from the wireless tag antenna 4. When the antenna 7 on the interrogator 3 side receives the electrical signal transmitted from the wireless tag antenna 4, the received electrical signal is transmitted from the antenna 7 to the interrogator 3, and the interrogator 3 performs signal processing on the received electrical signal. The information stored in the memory 6 of the wireless tag 2 is displayed or printed and output.

  On the other hand, in writing information to the wireless tag 2, first, the user inputs information to be written to the interrogator 3, and requests writing of the input information. Then, a write request is transmitted from the interrogator 3 as an electrical signal. When the wireless tag antenna 4 on the wireless tag 2 side receives the electrical signal transmitted from the interrogator 3 via the antenna 7, the transmission / reception unit 5 receives the electrical signal received by the wireless tag antenna 4. The requested information is written into the memory 6.

A known example of the above-described wireless tag system is disclosed in Japanese Patent Application Laid-Open No. 2004-21776.
Japanese Patent Laid-Open No. 2004-21776

  When the conventional wireless tag system 1 is applied and used for sorting objects (for example, envelopes), the wireless tag 2 is attached to each of a plurality of objects 8 to be sorted, and information on the wireless tag 2 is obtained from the interrogator 3. By reading, the wireless tag 2 in the sorting area 9 shown in FIG. 6 is recognized. When a certain amount of sorting is completed, information is written to all the wireless tags 2 attached to the sorting objects 8 sorted in the sorting area 9.

  However, the wireless tag 2 used in the wireless tag system 1 is limited in the range in which information can be read and written, and the distance between the antenna 7 on the interrogator 3 side and the wireless tag antenna 4 on the wireless tag 2 side is specified. Reading and writing cannot be performed if the distance is more than. Also, a distance at which information can be normally written to the wireless tag 2 (hereinafter referred to as a writable distance) and a distance at which information can be normally read from the wireless tag 2 (hereinafter referred to as a readable distance). In general, the writable distance is shorter than the readable distance.

  For this reason, when the sorting is completed and it becomes necessary to write information to the wireless tags (all within the readable distance) 2 attached to all sorting objects 8 gathered in the sorting area 9. A write error may occur, or halfway data may be written. This is because the writable distance of the wireless tag 2 is shorter than the readable distance, so that all the wireless tags 2 within the readable distance are not necessarily within the writable distance.

  In addition, a physical sensor is used when sorting into the sorting area 9 in order to prevent the occurrence of a writing error to the wireless tag 2 attached to the sorting target object 8 after sorting or to prevent halfway data writing. It is possible to use a method of recognizing the sorting object 8 when the wireless tag 2 is within the writable distance using a physical sensor such as an object detection sensor, although the existence of the sorting object 8 can be confirmed. It is difficult to specify what the sorting object 8 is. Furthermore, when a physical sensor is used, there is a disadvantage that may occur when the physical sensor cannot be recognized depending on the sorting method.

  The present invention was made in order to solve the above-described problem, and when writing information to the wireless tag after reading the information of the wireless tag and storing it in a certain number, occurrence of a write error, It is an object of the present invention to provide a wireless tag read / write device that prevents halfway data writing.

  Another object of the present invention is to provide a wireless tag read / write device capable of storing a certain number of read wireless tags as they are.

  Furthermore, another object of the present invention is to provide a wireless tag read / write device capable of storing a certain number of read wireless tags as they are and then writing information to all the stored wireless tags simultaneously.

  In order to solve the above-described problems, a wireless tag read / write device according to the present invention includes a storage casing for storing an object with a wireless tag attached thereto, and the wireless tag includes a wireless tag. Provided with a reading antenna for reading the information of the wireless tag in the storage casing when the attached item is stored, and a writing antenna for writing information to the wireless tag in the storage casing It is characterized by.

  In order to solve the above-described problem, the wireless tag read / write device according to the present invention is characterized in that, as described in claim 2, the storage casing blocks a part of the radio wave transmitted from the reading antenna. It further comprises radio wave shielding means for matching the readable range in which the reading antenna can read information on the wireless tag and the writable range in which the writing antenna can write information on the wireless tag. To do.

  Further, in order to solve the above-described problems, the wireless tag read / write device according to the present invention is characterized in that, as described in claim 3, the reading antenna is wirelessly connected to an entrance through which a wireless tag is attached. The readable range in which the tag information can be read is on the back side to the extent that it is formed in the storage casing, and is disposed on the opposite side to the surface that stores the object to which the wireless tag is attached. The antenna for use is disposed on the opposite side of the entrance / exit.

  Furthermore, in order to solve the above-described problem, the wireless tag read / write device according to the present invention includes a plurality of wireless tag-attached objects stored in the writing antenna. Even in the state, all the wireless tags in the storage casing are provided so as to be writable at the same time, and moreover, as described in claim 6, a plurality of items attached with the wireless tags are overlapped. In the housed state, it is provided at a position where radio waves can be transmitted in a parallel direction with respect to the surface to which the wireless tag is attached.

  On the other hand, in order to solve the above-described problem, a wireless tag read / write device according to the present invention includes a plurality of the storage casings, and a radio wave between the storage casing and an adjacent storage casing. 9. The storage casing according to claim 8, wherein the storage casing is configured to prevent a radio wave transmitted from the read antenna from leaking outside the storage casing. A radio wave shielding means is provided on the opposite side of the surface on which is installed.

  On the other hand, in order to solve the above-described problems, the radio tag read / write device according to the present invention is characterized in that the radio wave shielding means is a radio wave absorber.

  In order to solve the above-described problems, a wireless tag read / write device according to the present invention includes a storage casing for storing an object with a wireless tag attached thereto, and the wireless tag includes a wireless tag. A reading antenna for reading information on the wireless tag in the storage casing when the attached item is stored from the doorway and a writing antenna for writing information on the wireless tag in the storage casing are provided. The readable range in which the reading antenna can read information on the wireless tag includes the writable range in which the writing antenna can write information on the wireless tag, and matches the entrance / exit side. A reading antenna and a writing antenna are arranged.

  According to the wireless tag read / write device according to the present invention, the wireless tag read / write device is configured so that the range in which information of the wireless tag can be read matches the range in which information can be written to the wireless tag. When writing information to the wireless tag after reading the information of the wireless tag and storing a certain number together, it is possible to prevent a writing error and halfway data writing.

  In addition, even if a certain amount of data is placed in the wireless tag read / write area in the wireless tag read / write device, the newly placed wireless tag is recognized each time. A certain amount can be stored in the wireless tag read / write area.

  Furthermore, since the writing antenna is arranged so that the signal transmitted from the writing antenna can be received by all the wireless tags stored, all the stored wireless tags are stored after storing a certain number of the read wireless tags as they are. Information can be written to tags all at once.

  Embodiments of a wireless tag read / write device according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a schematic diagram showing a schematic configuration of an embodiment of a wireless tag system 11 to which a wireless tag read / write device 10 according to the present invention is applied.

  The wireless tag system 11 reads the information from the wireless tag 13 and writes the information to the wireless tag 13, acquires the information read from the wireless tag 13 by the wireless tag read / write device 10, An interrogator 14 that provides information to be written to the RFID tag writing apparatus 10 and an electronic calculator 15 as information management means for collecting and managing information acquired by the interrogator 14 are provided.

  The wireless tag read / write device 10 is electrically connected to the interrogator 14 via an electrical connection means such as a cable 17. The interrogator 14 reads information read from the wireless tag 13 via the cable 17. Can be acquired from the wireless tag read / write device 10. When information is to be written to the wireless tag 13, the information to be written is provided from the interrogator 14 to the wireless tag writing device 10 via the cable 17, so that the wireless tag writing device 10 stores the information on the wireless tag 13. Can write.

  The interrogator 14 and the electronic computer 15 are electrically connected. For example, the information read by the interrogator 14 can be acquired via information communication means such as the communication network 18, and can be collectively managed. it can.

  In FIG. 1, only one RFID tag reader / writer 10, interrogator 14, and electronic calculator 15 are shown. However, the number is not necessarily limited to the number shown in FIG. There may be multiple. It does not matter whether the communication network 18 is a dedicated line or not. Further, the communication network 18 is not necessarily constructed, and any information communication means may be used as long as the electronic computer 15 can acquire information from each interrogator 14.

  A wireless tag system 11 as shown in FIG. 1 can be applied as a system for sorting objects such as envelopes 20, for example. For example, when the wireless tag system 11 is applied as a system for sorting the envelopes 20, the wireless tag 13 is attached to the envelope 20 to be sorted, and the wireless tag read / write device is set for each of several predetermined sorting sections. 10 is prepared.

  Then, the sorting operation is performed according to the sorting category, and the envelopes 20 are sorted into the wireless tag read / write device 10 corresponding to the sorting category. The envelope 20 sorted into the wireless tag reader 10 reads the information of the wireless tag 13 attached to the envelope 20 by the wireless tag reader / writer 10, and the read information is transmitted from the wireless tag reader / writer 10 to the interrogator 14. The

  The sorted envelopes 20 are temporarily stored (temporarily placed) in the wireless tag read / write device 10. The sorting operation is continued, and a plurality of envelopes are temporarily placed in each wireless tag read / write device 10. Then, the envelopes 20 sorted at the timing when a certain amount of sorting is completed are transferred from the wireless tag read / write device 10 to the storage means 21 that can store more envelopes 20.

  At the time of transfer to the storage means 21, that is, immediately before the envelope 20 temporarily placed from the wireless tag read / write device 10 is transferred, information regarding the sorting category is written to the wireless tag read / write device 10 from the interrogator 14. When the writing is completed, the envelope 20 is moved to the storage means 21.

  Next, each embodiment of the wireless tag read / write device 10 when the wireless tag system 11 is applied as a system for sorting objects will be described. In the following description, the case where the object to be sorted is the envelope 20 will be described as an example.

[First Embodiment]
FIG. 2 is a diagram showing a first embodiment of the wireless tag read / write device according to the present invention, and is a configuration diagram schematically showing the configuration of the wireless tag read / write device 10A. Note that the x-axis direction, the y-axis direction, and the z-axis direction shown in FIG. 2 will be described as a vertical direction, a horizontal direction, and a height direction in the text.

  A wireless tag read / write device 10A shown in FIG. 2 is a diagram showing the wireless tag read / write device 10 in the wireless tag system 11 configured as shown in FIG. 1 in more detail. According to FIG. 2, the wireless tag read / write device 10 </ b> A has at least one storage casing 25 as a temporary storage means for temporarily storing a sorting object to which the wireless tag 13 is attached, that is, the envelope 20 with the wireless tag 13. These are provided and arranged continuously or at intervals in the lateral direction (y-axis direction shown in FIG. 2).

  The storage casing 25 is formed, for example, in a box shape having an opening inside and formed in a hollow shape. The opening surface of the storage casing 25 is provided as an inlet / outlet 26 through which the envelope 20 is temporarily placed in the storage casing 25. According to FIG. 2, the front surface (yz in the x-axis origin direction) is provided. Plane) is open. When the envelope 20 is temporarily placed in the storage casing 25, it can be temporarily stored on the bottom surface (the xy plane on the origin direction side of the z-axis) from the entrance 26 into the storage casing 25. .

  As shown in FIG. 2, the wireless tag read / write device 10A is connected to one end of a cable 17 serving as an electrical connection means. The other end of the cable 17 is omitted in FIG. 2 and is not shown, but is connected to the interrogator 14 as shown in FIG. The wireless tag read / write device 10A and the interrogator 14 can transmit and receive signals.

  FIG. 3 is a cross-sectional view taken along line II of the storage casing 25 in the wireless tag read / write device 10A shown in FIG. FIG. 3A shows a case where the electromagnetic wave absorber 29 is provided in the storage casing 25, and FIG. 3B shows a case where the electromagnetic wave absorber 29 is not provided in the storage casing 25.

  According to FIG. 3A, the storage casing 25 is used when reading information stored in the radio wave absorber 29 as a radio wave shielding means for blocking radio waves and the wireless tag 13 temporarily placed in the storage casing 25. A reading antenna 30 and a writing antenna 31 used for writing information to the wireless tag 13 temporarily placed in the storage casing 25 are provided. Each of the reading antenna 30 and the writing antenna 31 includes: It is connected to the interrogator 14 through electrical connection means such as a cable 17.

  Any radio wave shielding means other than the radio wave absorber 29 may be used as the radio wave shielding means of the wireless tag read / write device 10A. However, the radio wave absorber 29 is used for other radio wave shielding means. The reason for this is that when irregular reflection of radio waves occurs in the storage casing 25, it may not have an unexpected adverse effect. Further, if the radio wave absorber 29 is used as the radio wave shielding means, it is not necessary to consider the influence of the irregular reflection of radio waves.

  The reading antenna 30 in the wireless tag read / write device 10A is provided to recognize from the interrogator 14 that the envelope 20 with the wireless tag 13 has been temporarily placed in the storage casing 25. 31 is provided for writing information in the wireless tag 13 attached to the envelope 20 temporarily placed in the storage casing 25.

  In the storage casing 25, the radio wave absorber 29 is disposed so as to block a signal (radio wave) transmitted from the reading antenna 30 from traveling in the direction of the entrance / exit 26. The radio wave absorber 29 is arranged so as to block radio waves transmitted from the reading antenna 30 because the information on the wireless tag 13 formed inside the housing casing 25 can be normally read (hereinafter referred to as the readable range). And a range in which information can be normally written to the wireless tag 13 (hereinafter referred to as a writable range) are matched (if the error has no practical problem, it is regarded as a match. The same shall apply hereinafter). Because.

  Here, the case where the electromagnetic wave absorber 29 is provided in the storage casing 25 as shown in FIG. 3A and the case where the electric wave absorber 29 is not provided in the storage casing 25 as shown in FIG. 3B are compared. To do.

  First, as shown in FIG. 3B, when the electromagnetic wave absorber 29 is not provided in the storage casing 25, the readable range a and the writable range b formed inside the storage casing 25 do not match, The readable range a protrudes in the direction of the entrance 26. For this reason, when the envelope 20 is stored in the storage casing 25, a situation may occur in which the wireless tag 13 is in the readable range a but not in the writable range b. If the wireless tag 13 is in the readable range a but not in the writable range b, an error in writing information to the wireless tag 13 or a halfway data write may occur.

  Therefore, a radio wave absorber 29 is provided in the storage casing 25 as shown in FIG. Then, the radio wave traveling from the reading antenna 30 toward the entrance / exit 26 is absorbed by the radio wave absorber 29, and the radio wave traveling toward the entrance / exit 26 is blocked. As a result, since the readable range a formed inside the storage casing 25 is narrowed, the readable range a formed inside the storage casing 25 can be matched with the writable range b.

  If the readable range a formed in the storage casing 25 coincides with the writable range b, the wireless tag 13 stored in the storage casing 25 and capable of reading information is always in the writable range. It will be in. That is, by making the readable range a formed inside the storage casing 25 coincide with the writable range b, the readable distance of the reading antenna 30 is longer than the writable distance of the writing antenna 31. Thus, it is possible to prevent the occurrence of an error in writing information to the wireless tag 13 and the occurrence of halfway data writing.

  Further, the reading antenna 30 has a back side (x-axis) on the upper surface (xy plane on the z-axis large direction side) so that the information of the wireless tag 13 temporarily placed inside the housing casing 25 can be read. Provided on the large direction side).

  The reading antenna 30 is provided on the upper surface of the storage casing 25 in order to read information on the wireless tag 13 attached to the envelope 20 temporarily placed on the bottom surface side of the storage casing 25. The reading antenna 30 is provided so as not to read information of the wireless tag 13 outside the entrance 26. Further, the reason why the writing casing 31 is provided on the back side of the upper surface of the storage casing 25 is that the writable range b of the writing antenna 31 is formed on the back side of the storage casing 25.

  The back side is the back side with respect to the entrance / exit 26 of the storage casing 25 and corresponds to a range b in which the writing antenna 31 installed on the back surface can write information to the wireless tag 13 in the storage casing 25. A range.

  The writing antenna 31 is provided on the back surface (the yz plane in the large x-axis direction) of the storage casing 25. The writing antenna 31 is provided on the back surface of the storage casing 25 because, when the writing antenna 31 is disposed on the top surface of the storage casing 25, radio waves (signals) are transmitted from the height direction in which the wireless tag 13 overlaps. This is because all the wireless tags 13 cannot receive radio waves.

  By installing the writing antenna 31 on the back surface, the radio wave transmitted from the writing antenna 31 is transmitted in the vertical direction. Then, the transmitted radio waves can enter the gaps between the envelopes 20 that are placed on top of each other, and all the wireless tags 13 can receive the radio waves. Therefore, it is possible to write all the wireless tags 13 attached to the plurality of envelopes 20 temporarily placed in a lump. That is, by installing the writing antenna 31 on the back side, simultaneous writing to all the wireless tags 13 attached to the envelopes 20 temporarily placed in a plurality of layers is realized.

  According to the wireless tag read / write device 10A configured as described above, not only the wireless tag reading means for reading information from the wireless tag 13 and the wireless tag writing means for writing information to the wireless tag 13, but also the wireless tag 13 is provided. It can also serve as a temporary storage means for temporarily storing the attached item (in this case, the envelope 20).

Further, in the wireless tag read / write device 10A, since the information of the wireless tag 13 is read inside the storage casing 25, the envelope 20 with the wireless tag 13 is temporarily stored (temporarily placed) so that the wireless tag 13 is on the back side. At this time, information of the wireless tag 13 attached to the temporarily placed envelope 20 can be read from the interrogator 14. After reading, the envelope 20 can be temporarily placed in the storage casing 25 as it is.

  Further, since it is not necessarily detected by the physical sensor whether or not it has been temporarily placed in the storage casing 25, a new envelope can be obtained even if temporary placement of a new envelope 20 is repeated on the temporarily placed envelope 20. The information on the wireless tag 13 attached to the temporarily placed envelope 20 can be read from the interrogator 14 every time the 20 is temporarily placed.

  On the other hand, even when information is written to the wireless tag 13 from the state temporarily placed in the storage casing 25, the readable range a and the writable range b formed inside the storage casing 25 match. Therefore, it is possible to prevent the occurrence of a writing error or the halfway data writing when writing information.

  In addition, when information is written to the wireless tag 13 from a state where a plurality of envelopes 20 with the wireless tag 13 are temporarily stacked and placed, the radio wave transmitted from the writing antenna 31 is divided into a plurality of radio waves. Since it can enter into the gaps between the envelopes 20 that are temporarily placed on top of each other, information can be simultaneously written to the wireless tags 13 attached to all the envelopes 20.

  Note that the wireless tag read / write device 10A is not limited to the form shown in FIG. All forms realized by rotating the storage casing 25 as it is in any direction and angle are included.

  For example, according to FIG. 2, the wireless tag read / write device 10 </ b> A is provided with the entrance / exit 26 of the storage casing 25 on the front surface (the yz plane in the x-axis origin direction). The wireless tag read / write device 10 </ b> A also includes a configuration in which the entrance / exit 26 of the storage casing 25 is realized by rotating the storage casing 25 by 90 ° so that the top surface 26 is on the top surface.

  Moreover, although the storage casing 25 is illustrated in a box shape according to FIG. 2, the storage casing 25 does not necessarily have a box shape, and an arbitrary shape may be selected according to the intended use. For example, the storage casing 25 may be formed of a hexagonal column having a hexagonal opening surface as the entrance / exit 26. Furthermore, although all the storage casings 25 are illustrated with the same size, they do not prevent the storage casings 25 from having different sizes.

[Second Embodiment]
FIG. 4 is a configuration diagram schematically showing the configuration of a wireless tag read / write device 10B which is the second embodiment of the wireless tag read / write device according to the present invention. Note that the x-axis direction, the y-axis direction, and the z-axis direction shown in FIG. 4 are described as a vertical direction, a horizontal direction, and a height direction in the text as in the case of FIG.

  According to FIG. 4, the wireless tag read / write device 10 </ b> B is different from the wireless tag read / write device 10 </ b> A in that radio wave shielding means is provided between the storage casing 25 and the adjacent storage casing 25 and the arrangement direction of the storage casing 25. Although different, in other respects, it is essentially not different from the wireless tag read / write device 10A.

  Therefore, in the description of the wireless tag read / write device 10B, portions that are essentially not different from the wireless tag read / write device 10A are assigned the same reference numerals and description thereof is omitted. Also, the description of the operation, effect, and modification of parts that are not essentially different from the RFID tag read / write device 10A will be omitted.

  The wireless tag read / write device 10B includes a plurality of storage casings 25 and is continuously arranged in the height direction (z-axis direction). Further, a radio wave absorber 29 as a radio wave shielding means is inserted between the storage casing 25 and the adjacent storage casing 25, and the radio wave absorber 29 is disposed between the two storage casings 25. That is, the storage casing 25 and the radio wave absorber 29 are alternately and continuously disposed.

  The radio wave absorber 29 is arranged between the storage casing 25 and the adjacent storage casing 25 because the radio wave emitted from the reading antenna 30 of one storage casing 25 is received in the other storage casing 25. It is for preventing.

  In the case of the wireless tag read / write device 10A, the arrangement of the storage casing 25 is in the horizontal direction (horizontal direction), while the traveling direction of the radio wave transmitted from the reading antenna 30 is basically in the height direction (z-axis direction). Therefore, the fact that the radio wave transmitted from the reading antenna 30 of one storage casing 25 is received in another storage casing 25 is related to the shape of the storage casing 25 and the readable range of the reading antenna 30. Although it depends, it is thought that there is almost none.

  However, when the arrangement of the storage casing 25 and the traveling direction of the radio wave transmitted from the reading antenna 30 coincide with each other as in the wireless tag read / write device 10B, transmission is performed from the reading antenna 30 of one storage casing 25. It is possible that the received radio wave is received in another storage casing 25, particularly in the storage casing 25 adjacent to the storage casing 25 that emits radio waves. If a radio wave transmitted from the reading antenna 30 of one storage casing 25 is received in another storage casing 25, the wireless tag read / write device 10B malfunctions, resulting in inconvenience.

  Therefore, in the wireless tag read / write device 10B, a radio wave absorber 29 as a radio wave shielding means is inserted between the storage casing 25 and the adjacent storage casing 25, and the radio waves emitted from one storage casing 25 are transmitted to other storage casings. 25 is prevented.

  By inserting a radio wave absorber 29 as a radio wave shielding means between the storage casing 25 and the adjacent storage casing 25, radio waves emitted from the reading antenna 30 of one storage casing 25 are absorbed by the radio wave absorber 29. Therefore, it can shield, without reaching the adjacent storage casing 25.

  Considering the readable distance of the reading antenna 30, it is considered that radio waves do not reach other storage casings 25 that are not adjacent to each other. It is considered that the casing 25 can also be shielded. Therefore, the inconvenience of receiving radio waves emitted from the reading antenna 30 of one storage casing 25 in another storage casing 25 is eliminated.

  According to the wireless tag read / write device 10B configured as described above, even when a plurality of storage casings 25 are arranged in the height direction, the same effect as the wireless tag read / write device 10A can be obtained.

  In the wireless tag read / write device 10B, the radio wave absorber 29 inserted between the two storage casings 25 is disposed outside the storage casing 25. However, the reading antenna 30 is installed inside each storage casing 25. The radio wave absorber 29 may be provided on a surface (bottom surface: xy plane in the z-axis origin direction) that faces the surface (upper surface: xy plane in the large z-axis direction). In addition, the storage casing 25 of the wireless tag read / write device 10B is continuously disposed, but may be disposed at intervals.

  On the other hand, the wireless tag read / write device 10B is not limited to the form shown in FIG. 4 as with the wireless tag read / write device 10A. All forms realized by rotating the storage casing 25 as it is in any direction and angle are included.

[Modification]
FIG. 5 is a schematic view showing an outline of a storage casing 25A formed by changing the position where the writing antenna 31 is installed in the wireless tag read / write device 10A and the wireless tag read / write device 10B. FIG. It is a figure and (B) is sectional drawing which follows the II-II line illustrated by FIG. 5 (A).

  According to FIGS. 3 and 5, the storage casing 25 </ b> A is essentially the same as the storage casing 25 except for the position where the writing antenna 31 is provided. More specifically, the writing antenna 31 of the storage casing 25 is a surface (rear surface: yz in the large x-axis direction) that faces the surface (front surface: yz plane in the x-axis origin direction) with the entrance 26. On the other hand, the writing antenna 31 of the storage casing 25A is one of the side surfaces (xz plane) with respect to the front surface with the entrance 26 and the back side with respect to the entrance 26 (large x-axis). It differs in that it is attached in the direction).

  As shown in FIG. 5, even when the writing antenna 31 is attached to one of the side surfaces (xz plane) relative to the front surface and attached to the back side (x-axis large direction), the transmitted radio wave is In view of the fact that all the wireless tags 13 can receive radio waves, it is attached to all the envelopes 20 temporarily placed in the storage casing 25A. There is no problem in writing information to all the wireless tags 13 at the same time.

  As described above, according to the wireless tag read / write device 10 according to the present invention, not only the wireless tag reading means for reading information from the wireless tag 13 and the wireless tag writing means for writing information to the wireless tag 13, but also the wireless tag 13 is provided. It can also serve as a temporary storage means for temporarily storing the attached item (in this case, the envelope 20).

  Further, since the information of the wireless tag 13 is read inside the storage casing 25, the envelope 20 attached with the wireless tag 13 is temporarily placed when temporarily storing (temporarily placing) the wireless tag 13 on the back side. Information on the wireless tag 13 attached to the envelope 20 can be read from the interrogator 14. After reading, the envelope 20 can be temporarily placed in the storage casing 25 as it is.

  Further, since it is not necessarily detected by the physical sensor whether or not it has been temporarily placed in the storage casing 25, a new envelope can be obtained even if temporary placement of a new envelope 20 is repeated on the temporarily placed envelope 20. The information on the wireless tag 13 attached to the temporarily placed envelope 20 can be read from the interrogator 14 every time the 20 is temporarily placed.

  On the other hand, even when information is written to the wireless tag 13 from the state temporarily placed in the storage casing 25, the readable range a and the writable range b formed inside the storage casing 25 match. Therefore, it is possible to prevent the occurrence of a writing error or the halfway data writing when writing information.

  In addition, when information is written to the wireless tag 13 from a state where a plurality of envelopes 20 with the wireless tag 13 are temporarily stacked and placed, the radio wave transmitted from the writing antenna 31 is divided into a plurality of radio waves. Since it can enter into the gaps between the envelopes 20 that are temporarily placed on top of each other, information can be simultaneously written to the wireless tags 13 attached to all the envelopes 20.

  On the other hand, even when a plurality of storage casings 25 are arranged in the height direction, a radio wave absorber 29 as a radio wave shielding means is inserted between the storage casing 25 and the adjacent storage casing 25, so that one storage casing is provided. Since the radio waves emitted from the other storage casing 25 can be shielded by the other storage casing 25, there is no inconvenience of receiving the radio waves emitted from one storage casing 25 inside the other storage casing 25.

  In the case of the wireless tag read / write device 10 </ b> A, the storage casing 25 is because the radio waves transmitted from the reading antenna 30 of one storage casing 25 are hardly received in the other storage casing 25. The radio wave absorber 29 is not inserted between the storage case 25 and the adjacent storage case 25. However, even if the radio wave absorber 29 is inserted between the storage casing 25 of the wireless tag read / write device 10A and the adjacent storage case 25. There is no problem.

  In the RFID tag read / write device 10 according to the present invention, the reading antenna 30 and the writing antenna 31 are installed on the back side of the entrance / exit 26 in the storage casings 25 and 25A. If the writable range b of 31 is in the storage casings 25 and 25A and the writable range a of the reading antenna 30 is set to coincide with the writable range b of the writing antenna 31, It doesn't have to be on the back side.

  Furthermore, the wireless tag read / write device 10 according to the present invention includes a wireless tag read / write device formed by appropriately combining the wireless tag read / write device 10A and the wireless tag read / write device 10B.

  On the other hand, although the RFID tag read / write device 10 according to the present invention has been described using the envelope 20 as an example of the sorting object, the sorting object is not necessarily the envelope 20. Anything (such as a product) that can be taken in and out of the storage casing 25 can be used in the same manner.

  Further, in the wireless tag read / write device 10 according to the present invention, the radio wave absorber 29 as the radio wave shielding means is provided in the storage casing 25. However, when the radio tag read / write device 10 is configured using the storage casing 25A, the The end of the writable area b formed by the insertion antenna 31 and the end of the writable area a formed by the reading antenna 30 are aligned with the end of the read area 30 on the inlet 26 side. The radio wave absorber 29 is not necessarily required as long as the insertion antenna 31 can be disposed.

1 is a schematic diagram showing a schematic configuration of an embodiment of a wireless tag system to which a wireless tag read / write device according to the present invention is applied. 1 is a schematic configuration diagram schematically illustrating the configuration of a wireless tag read / write device according to a first embodiment of the present invention. (A) is sectional drawing in alignment with the II line | wire of FIG. 2 at the time of providing a radio wave absorber in the storage casing of the RFID tag reading / writing apparatus which concerns on the 1st Embodiment of this invention, (B) is this Sectional drawing which follows the II line | wire of FIG. 2 in the case of not providing an electromagnetic wave absorber in the storage casing of the radio | wireless tag read / write apparatus which concerns on the 1st Embodiment of invention. FIG. 5 is a schematic configuration diagram schematically illustrating a configuration of a wireless tag read / write device according to a second embodiment of the present invention. FIG. 7 is a schematic view showing an outline of a storage casing formed by changing a position where a writing antenna is installed as a modification of the RFID tag read / write device according to the present invention, and (A) is a perspective view of the storage casing; B) is a cross-sectional view taken along line II-II illustrated in (A). Explanatory drawing explaining the reading of the information from the wireless tag in the conventional wireless tag system, and the writing of the information to a wireless tag.

Explanation of symbols

10, 10A, 10B Wireless tag read / write device 11 Wireless tag system 13 Wireless tag 14 Interrogator 15 Electronic computer 17 Cable (electrical connection means)
18 Communication network (information communication means)
20 Envelope 21 Storage means 25, 25A Storage casing 26 Entrance / exit 29 Radio wave absorber (radio wave shielding means)
30 Reading antenna 31 Writing antenna

Claims (10)

A storage casing for storing an object attached with a wireless tag, and a reading antenna for reading information on the wireless tag in the storage casing when the object attached with the wireless tag is stored in the storage casing; A wireless tag read / write device comprising a writing antenna for writing information to the wireless tag in the housing casing. The storage casing blocks a part of the radio wave transmitted from the reading antenna so that the reading antenna can read information on the wireless tag and the writing antenna transmits information to the wireless tag. 2. The wireless tag read / write device according to claim 1, further comprising a radio wave shielding means for matching a writable range in which can be written. The reading antenna is located on the back side to the extent that a readable range in which information on the wireless tag can be read is formed in the storage casing with respect to the entrance and exit through which the object with the wireless tag is attached and exits. 3. The wireless tag read / write device according to claim 1 or 2, wherein the writing antenna is arranged in a face-to-face relationship with respect to the face that accommodates a tag-attached object. The reading antenna is located on the back side to the extent that a readable range in which information on the wireless tag can be read is formed in the storage casing with respect to the entrance and exit through which the object with the wireless tag is attached and exits. The writing antenna is one of the side surfaces with respect to the entrance / exit, while the writable range in which information can be written to the wireless tag is read. The wireless tag read / write device according to claim 1, wherein the wireless tag read / write device is arranged to be included in a range. 2. The writing antenna is provided so that all the wireless tags in the storage casing can be written simultaneously even in a state where a plurality of wireless tag-attached items are stored. Or the wireless tag read / write device according to 2. The writing antenna is provided at a position where radio waves can be transmitted in a parallel direction with respect to the surface to which the wireless tag is attached in a state where a plurality of objects attached with the wireless tag are stacked and stored. The wireless tag read / write device according to claim 1 or 2, characterized in that: The wireless tag read / write device according to claim 1, wherein a plurality of the storage casings are provided, and radio wave shielding means is provided between the storage casing and an adjacent storage casing. The electromagnetic wave shielding means is provided on the surface opposite to the surface on which the reading antenna is installed so that the electric wave transmitted from the reading antenna does not leak outside the storage casing. The wireless tag read / write device according to 1 or 2. The wireless tag read / write device according to claim 2, wherein the radio wave shielding means is a radio wave absorber. A storage casing for storing an article with a wireless tag is provided, and a reading casing for reading information on the wireless tag in the storage casing when the article with the wireless tag is stored in the storage casing. An antenna and a writing antenna for writing information to the wireless tag in the storage casing;
The reading is such that the readable range in which the reading antenna can read the information of the wireless tag includes the writable range in which the writing antenna can write the information in the wireless tag, and coincides with the entrance / exit side. A wireless tag read / write device, wherein an antenna for writing and an antenna for writing are arranged.

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