JP2005327099A - Radio tag read device and storage case and article - Google Patents

Radio tag read device and storage case and article Download PDF

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JP2005327099A
JP2005327099A JP2004144806A JP2004144806A JP2005327099A JP 2005327099 A JP2005327099 A JP 2005327099A JP 2004144806 A JP2004144806 A JP 2004144806A JP 2004144806 A JP2004144806 A JP 2004144806A JP 2005327099 A JP2005327099 A JP 2005327099A
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wireless tag
reader
storage case
wireless
antenna
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JP3851639B2 (en
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Masakazu Kato
雅一 加藤
Sadatoshi Oishi
禎利 大石
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Toshiba TEC Corp
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10158—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
    • G06K7/10178—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio tag read device correctly reading each radio tag even if many articles attached with the radio tags are stored in a storage case at a time and having a simplified configuration; and to provide the storage case and the articles. <P>SOLUTION: The storage case 3 storing a plurality of aligned mail envelopes 1 attached with the radio tags 2 are placed on a support stand 4. A reader antenna 5 is arranged below the support stand. In addition, a plurality of parasitic elements 8 consisting of a linear conductor are arranged at predetermined spaced intervals on the support stand located between the radio tags 2 and the reader antenna 5. Finally, an interrogator 7 reads data from the radio tag of each of the mail envelopes through the reader antenna 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、収納ケースに無線タグを取り付けた封筒などの物品を複数収納し、この各物品の無線タグからＩＤやデータを読み取る無線タグ読取装置及びこの無線タグ読取装置に使用する収納ケース並びに物品に関する。   The present invention stores a plurality of articles such as envelopes with a wireless tag attached to a storage case, reads a ID or data from the wireless tag of each article, a storage case used for the wireless tag reader, and the article About.

収納ケースに無線タグを取り付けた物品、例えば郵便物を複数収納し、各郵便物に取り付けられた無線タグに格納されているＩＤやデータを、収納ケースの外部に配置したリーダ・アンテナで読み取る装置としては、収納ケース内を、アンテナを配置した複数の仕切り板で所定の間隔に仕切り、それぞれの仕切られた空間に郵便物を１つずつ収納し、それぞれ仕切り板に配置したアンテナを介して該当する無線タグからデータを読み取るものが知られている（例えば、特許文献１参照）。
特開２００２−３７４２５公報 A device that stores a plurality of articles, for example, mail items, with a wireless tag attached to a storage case, and reads IDs and data stored in the wireless tag attached to each mail item with a reader / antenna arranged outside the storage case As for the inside of the storage case, a plurality of partition plates with antennas are partitioned at predetermined intervals, mail pieces are stored one by one in each partition space, and the corresponding cases are via the antennas arranged on the partition plates. A device that reads data from a wireless tag is known (see, for example, Patent Document 1).
JP 2002-37425 A

このように従来は、無線タグが重なるとデータの読み取りができなくなるという問題を解決するために、収納ケースに仕切り板を設けてそれぞれの仕切られた空間に郵便物を１つずつ収納するようにしていたが、この方法では、一度に多数の郵便物を収納することができず、このため、無線タグの読み取り効率が悪かった。また、収納ケースに仕切り板を設けるとともに各仕切り板にアンテナを配置しているため、構成が複雑化するという問題があった。
逆に仕切り板のないケースに多数の郵便物を収納すると、各郵便物に取り付けられた無線タグ同士が重なってしまい、読み取りができなくなるという問題が発生する。 As described above, conventionally, in order to solve the problem that data cannot be read when the wireless tags overlap, a partition plate is provided in the storage case so that mails are stored one by one in each partitioned space. However, with this method, a large number of pieces of mail cannot be stored at one time, and the reading efficiency of the wireless tag is poor. In addition, since a partition plate is provided in the storage case and an antenna is disposed on each partition plate, there is a problem that the configuration is complicated.
On the other hand, when a large number of mail items are stored in a case without a partition plate, wireless tags attached to the respective mail items overlap with each other, causing a problem that reading is impossible.

本発明は、このような問題を解決するために為されたもので、無線タグを取り付けた物品を収納ケースに一度に多数収納しても、各無線タグを正しく読み取ることができ、しかも構成を簡単化できる無線タグ読取装置及び収納ケース並びに物品を提供する。   The present invention has been made to solve such a problem, and even when a large number of articles attached with wireless tags are stored in a storage case at a time, each wireless tag can be read correctly, and the configuration is Provided are an RFID tag reader, a storage case, and an article that can be simplified.

本発明は、無線タグを取り付けた平板状の物品を複数並べて収納する収納ケースの近傍に配置されたリーダ・アンテナと、無線タグとリーダ・アンテナとの間に配置した無給電素子とを備え、リーダ・アンテナを介して各物品の無線タグを読み取ることにある。   The present invention comprises a reader / antenna disposed in the vicinity of a storage case for storing a plurality of flat-plate-like articles attached with a wireless tag, and a parasitic element disposed between the wireless tag and the reader / antenna, The wireless tag of each article is read via a reader / antenna.

本発明によれば、無線タグを取り付けた物品を収納ケースに一度に多数収納して各物品が重なっても各無線タグのＩＤやデータを正しく読み取ることができ、これにより無線タグの読み取り効率を向上でき、しかも構成を簡単化できる。   According to the present invention, a large number of articles with wireless tags attached can be stored in a storage case at a time, and even if the articles overlap, the ID and data of each wireless tag can be read correctly, thereby improving the reading efficiency of the wireless tag. It can be improved and the configuration can be simplified.

以下、本発明の実施の形態を、図面を参照して説明する。
（第１の実施の形態）
図１は全体構成を示す図で、１はＩＤやデータを格納した無線タグ２を取り付けた物品、例えば、郵便封筒で、この郵便封筒１を多数重ねるように並べて収納ケース３に収納している。なお、ここでは内部の郵便封筒１が見えるように収納ケース３を点線で示している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a diagram showing an overall configuration, and 1 is an article attached with a wireless tag 2 storing ID and data, for example, a postal envelope, and a large number of postal envelopes 1 are stacked and stored in a storage case 3. . Here, the storage case 3 is indicated by a dotted line so that the internal mail envelope 1 can be seen.

前記収納ケース３を支持台４の上に載せ、その支持台４の下方にリーダ・アンテナ５を配置している。前記リーダ・アンテナ５は同軸ケーブル６を介して質問器７に接続している。前記支持台４の上には、線状の導体からなる無給電素子８を複数、所定の間隔で配置している。   The storage case 3 is placed on a support base 4, and a reader / antenna 5 is disposed below the support base 4. The reader / antenna 5 is connected to an interrogator 7 via a coaxial cable 6. A plurality of parasitic elements 8 made of linear conductors are arranged on the support base 4 at a predetermined interval.

図２は、郵便封筒１の下端に例えば厚さが３mmで中空としたスペーサ９を貼り、このスペーサ９の中空によって形成した凹部１０に無線タグ２を貼り付けた無線タグ付き封筒１１を示している。この無線タグ付き封筒１１を、例えば３０枚、前記収納ケース３に無線タグ２が同じ高さ位置になるように揃えて入れる。前記収納ケース３は、例えば、ポリカーボネートなどの非金属によって構成されている。収納ケース３内においては隣接する無線タグ２間の最小間隔は、郵便封筒１の厚さとスペーサ９の厚さを加算した約３．２mm程度となる。   FIG. 2 shows an envelope 11 with a wireless tag in which a spacer 9 having a thickness of, for example, 3 mm is attached to the lower end of the post envelope 1 and the wireless tag 2 is attached to a recess 10 formed by the hollow of the spacer 9. Yes. For example, 30 envelopes 11 with wireless tags are put in the storage case 3 so that the wireless tags 2 are at the same height. The storage case 3 is made of, for example, a nonmetal such as polycarbonate. In the storage case 3, the minimum distance between adjacent wireless tags 2 is about 3.2 mm, which is the sum of the thickness of the postal envelope 1 and the thickness of the spacer 9.

前記支持台４の上に配置される複数の無給電素子８は、図３に示すように、例えば幅ｔが１．０〜１．５mm程度で長さＬが４０mm程度の線状導体からなり、これを間隔Ｄで平行に配置している。ここでは間隔Ｄは約７mmになっている。そして、配置された複数の無給電素子８の両端にある無給電素子８間の幅Ｔを略９０mmにしている。   As shown in FIG. 3, the plurality of parasitic elements 8 arranged on the support base 4 are made of linear conductors having a width t of about 1.0 to 1.5 mm and a length L of about 40 mm, for example. These are arranged in parallel at intervals D. Here, the distance D is about 7 mm. The width T between the parasitic elements 8 at both ends of the plurality of parasitic elements 8 arranged is approximately 90 mm.

前記支持台４は、特にリーダ・アンテナ５と無線タグ２の間に位置する面を、電波を遮断しないようにポリカーボネートなどの非金属製材料によって形成している。
このような構成とすることにより、収納ケース３に入れられた全ての無線タグ付き封筒１１の無線タグ２からＩＤやデータを読み取ることが可能になる。 The support base 4 is formed of a non-metallic material such as polycarbonate so that the surface positioned between the reader / antenna 5 and the wireless tag 2 is not cut off.
With such a configuration, it becomes possible to read IDs and data from the wireless tags 2 of all the wireless tag-attached envelopes 11 placed in the storage case 3.

図１に示す構成の無線タグ読取装置においては、無給電素子８の長さを、波長の３分の１前後に設定するのが最も適していることが実験から確認された。すなわち、無給電素子８の長さＬを変化させ、それぞれの長さにおいて支持台４の高さを可変しながら、収納ケース３に収納した３０枚の郵便封筒１１の無線タグ２からＩＤを読み取ることで実験を行った。   In the wireless tag reader having the configuration shown in FIG. 1, it has been confirmed from experiments that it is most suitable to set the length of the parasitic element 8 to about one third of the wavelength. That is, the length L of the parasitic element 8 is changed, and the ID is read from the wireless tags 2 of the 30 mail envelopes 11 stored in the storage case 3 while changing the height of the support base 4 at each length. The experiment was conducted.

図４はこの実験における無給電素子８の長さＬと最大読取距離との関係の一例を示したグラフである。なお、最大読取距離とは、収納ケース３に収納した３０枚の郵便封筒１１の全ての無線タグ２からＩＤが読み取れるときの、リーダ・アンテナ５と支持台４の下面との間の最も離れた距離を言う。   FIG. 4 is a graph showing an example of the relationship between the length L of the parasitic element 8 and the maximum reading distance in this experiment. The maximum reading distance is the furthest distance between the reader antenna 5 and the lower surface of the support base 4 when IDs can be read from all the wireless tags 2 of the 30 postal envelopes 11 stored in the storage case 3. Say distance.

図４のグラフから分かるように、無給電素子８の長さが４１mm付近で最大読取距離は最も大きくなり、４３mm辺りを超えると急に読取距離は短くなる。長さを４０mmよりも短くすると読取距離は短くなるが、長くした場合よりも緩やかに下降することが分かる。実際には、通信周波数として２．４５ＧＨｚを使っているので、波長は１２２．４mmであり、波長の３分の１の長さは４０．８mmになる。このように、無給電素子８を波長の略３分の１の長さにした場合に読取距離が最も大きくなり、読取性能を向上させることができる。   As can be seen from the graph of FIG. 4, the maximum reading distance becomes the longest when the length of the parasitic element 8 is around 41 mm, and the reading distance suddenly becomes short when it exceeds about 43 mm. It can be seen that when the length is shorter than 40 mm, the reading distance is shortened, but it is lowered more slowly than when the length is increased. Actually, since 2.45 GHz is used as the communication frequency, the wavelength is 122.4 mm, and the length of one third of the wavelength is 40.8 mm. As described above, when the parasitic element 8 is approximately one-third of the wavelength, the reading distance is maximized, and the reading performance can be improved.

このように、無線タグ２とリーダ・アンテナ５との間に、無線タグ２の並び方向に導体から成る無給電素子８を複数平行に並べることにより、無線タグ２が重なってもＩＤの読み取りができるようになり、一度に多数の無線タグのＩＤを読み取ることができる。しかも、無給電素子８の長さを通信周波数の波長の略３分の１の長さとすることにより、読取性能の向上を図ることができる。   In this way, by arranging a plurality of parasitic elements 8 made of conductors in parallel between the wireless tag 2 and the reader antenna 5, the ID can be read even if the wireless tags 2 overlap. It becomes possible to read the IDs of a large number of wireless tags at a time. In addition, the reading performance can be improved by setting the length of the parasitic element 8 to approximately one third of the wavelength of the communication frequency.

上述した例では隣接する無給電素子間の間隔Ｄを約７mmとしたが、この間隔Ｄを３mm〜１０mmに変化させて無線タグのＩＤ読取実験を行った時の、間隔Ｄと最大読取距離との関係の一例を図５にグラフで示す。すなわち、無線タグ２を取り付けた封筒１１を３０枚重なるように並べて収納ケース３に収納し、リーダ・アンテナ５で無線タグ２からＩＤを読み取り、このときに３０枚全ての封筒１１の無線タグ２からＩＤが読み取れたときのリーダ・アンテナ５と支持台４の下面との間の最大読取距離と、無給電素子８の間隔Ｄとの相関を示している。なお、通信周波数としては２．４５ＧＨｚを使用している。無線タグ付き封筒１１はスペーサ９によって約３mm間隔で並べられている。   In the example described above, the distance D between adjacent parasitic elements is about 7 mm. However, the distance D and the maximum reading distance when the ID reading experiment of the wireless tag is performed by changing the distance D from 3 mm to 10 mm. An example of the relationship is shown in the graph of FIG. That is, 30 envelopes 11 attached with wireless tags 2 are arranged side by side so as to be stored in the storage case 3, and the ID is read from the wireless tag 2 by the reader / antenna 5, and at this time, the wireless tags 2 of all 30 envelopes 11 are read. 3 shows the correlation between the maximum reading distance between the reader antenna 5 and the lower surface of the support 4 when the ID can be read from the distance D of the parasitic element 8. Note that 2.45 GHz is used as the communication frequency. The wireless tag-equipped envelopes 11 are arranged at intervals of about 3 mm by spacers 9.

図５に示すように、無給電素子８の間隔Ｄを無線タグ２の最小間隔と同等の３mmにすると最大読取可能距離は６５mmで、無給電素子８の間隔Ｄを広げていくと最大読取可能距離は徐々に大きくなり、無給電素子８の間隔Ｄを７mmにすると最大読取可能距離は１３５mmで最も大きくなる。さらに、無給電素子８の間隔Ｄを広げていくと最大読取可能距離は徐々に小さくなり１０mmにすると最大読取可能距離は９５mmとなる。
このように無給電素子８の間隔Ｄには最適値があり、通信周波数を２．４５ＧＨｚに設定した状態で無線タグ２が３mm間隔で並んでいる場合には、無給電素子８の間隔Ｄを７mmにすると読取可能距離が最大となる。しかも、無給電素子８を配置する間隔Ｄは無線タグ２の最小間隔と同等とする必要は全くなく、むしろ無線タグ２の最小間隔よりも広くすることにより読取性能を高めることができることが分かった。すなわち、無給電素子８の間隔Ｄは７mm程度が最も適しているが、４mm〜１０mm程度であっても３mm間隔の場合よりも読取性能を向上することができる。 As shown in FIG. 5, when the distance D between the parasitic elements 8 is 3 mm, which is the same as the minimum distance of the wireless tag 2, the maximum readable distance is 65 mm, and the maximum reading is possible when the distance D between the parasitic elements 8 is increased. The distance gradually increases, and when the distance D between the parasitic elements 8 is 7 mm, the maximum readable distance is the largest at 135 mm. Further, as the distance D between the parasitic elements 8 is increased, the maximum readable distance is gradually reduced, and when the distance is 10 mm, the maximum readable distance is 95 mm.
Thus, there is an optimum value for the distance D between the parasitic elements 8, and when the wireless tags 2 are arranged at intervals of 3 mm with the communication frequency set to 2.45 GHz, the distance D between the parasitic elements 8 is When the distance is 7 mm, the readable distance is maximized. In addition, it has been found that the interval D at which the parasitic element 8 is arranged does not have to be equal to the minimum interval of the wireless tag 2, but rather the reading performance can be improved by making it wider than the minimum interval of the wireless tag 2. . That is, the distance D between the parasitic elements 8 is most preferably about 7 mm. However, even if the distance D is about 4 mm to 10 mm, the reading performance can be improved as compared with the case of the 3 mm distance.

また、図６は配置する無給電素子８の本数を変化させてデータ読取実験を行った時の、本数と最大読取距離との関係の一例を示すグラフである。すなわち、無線タグ２を取り付けた封筒１１を３０枚重ねて収納ケース３に収納し、リーダ・アンテナ５で無線タグ２からＩＤを読み取ったときに、３０枚全ての封筒１１の無線タグ２からＩＤが読み取れたときのリーダ・アンテナ５と支持台４の下面との間の最大読取距離と、無給電素子８の本数との相関を示している。なお、通信周波数としては２．４５ＧＨｚを使用している。無線タグ付き封筒１１はスペーサ９によって約３mm間隔で並べられ、無給電素子８は７mm間隔で設けられている。   FIG. 6 is a graph showing an example of the relationship between the number and the maximum reading distance when a data reading experiment is performed by changing the number of parasitic elements 8 to be arranged. That is, when 30 envelopes 11 attached with the wireless tags 2 are stacked and stored in the storage case 3 and the ID is read from the wireless tags 2 by the reader / antenna 5, the IDs from the wireless tags 2 of all 30 envelopes 11 are stored. 4 shows the correlation between the maximum reading distance between the reader antenna 5 and the lower surface of the support base 4 and the number of parasitic elements 8. Note that 2.45 GHz is used as the communication frequency. Envelopes 11 with wireless tags are arranged at intervals of about 3 mm by spacers 9 and parasitic elements 8 are provided at intervals of 7 mm.

スペーサ９を取り付けた無線タグ付き封筒１１を３０枚重ねて並べると、全体の幅は約９０mmになる。そして、図７に示すように、１４本の無給電素子８を約７mmで配置すると、配置した全体の幅は、７mm×１３＝９１mmで封筒１１の全体幅と略等しくなる。この場合は図６から１３５mm程度の最大読取距離が得られる。これに対し、図８に示すように、６本の無給電素子８を約７mmで配置すると、配置した全体の幅は７mm×５＝３５mmで封筒１１の全体幅の、３分の１強程度と短くなる。この場合は図６から並べられた全ての封筒１１の無線タグ２を読み取ることができないことになる。   If 30 envelopes 11 with RFID tags attached with spacers 9 are stacked and arranged, the overall width is about 90 mm. Then, as shown in FIG. 7, when the 14 parasitic elements 8 are arranged at about 7 mm, the overall arrangement width is 7 mm × 13 = 91 mm, which is substantially equal to the entire width of the envelope 11. In this case, a maximum reading distance of about 135 mm is obtained from FIG. On the other hand, as shown in FIG. 8, when six parasitic elements 8 are arranged at about 7 mm, the total width of the arranged elements is 7 mm × 5 = 35 mm, which is about a third of the entire width of the envelope 11. And shortened. In this case, the wireless tags 2 of all the envelopes 11 arranged from FIG. 6 cannot be read.

図６に示す結果から、無給電素子８の本数が１２本のときに読取距離が最大となり、１０本に減らしても１４本の場合よりも読取距離は大きくなっている。また、８本以下では最大読取距離は９０mm以下と短くなる。このように、図６においては無給電素子８の本数を９本から１５本程度にすることで最大読取可能距離を１００mm以上にできる。好ましくは、１０本から１３本の範囲に設定すれば最大読取可能距離を１４０mm以上にできる。これは封筒１１の全体幅に相当する本数である１４本よりも少なくすることにより最大読取可能距離を大きくすることができることを意味している。   From the results shown in FIG. 6, the reading distance is maximum when the number of parasitic elements 8 is 12, and the reading distance is larger than the case of 14 even if the number is reduced to 10. If the number is 8 or less, the maximum reading distance is as short as 90 mm or less. Thus, in FIG. 6, the maximum readable distance can be increased to 100 mm or more by setting the number of parasitic elements 8 to about 9 to 15. Preferably, the maximum readable distance can be increased to 140 mm or more by setting the range from 10 to 13. This means that the maximum readable distance can be increased by reducing the number from 14 which is the number corresponding to the entire width of the envelope 11.

このように、無線タグ付き封筒１１を多数収納する収納ケース３を載せる支持台４の上に線状の導体からなる無給電素子８を複数、所定の間隔で配置することで、収納ケース３に収納した封筒１１が重なっても各無線タグ２のＩＤやデータを正しく読み取ることができ、無線タグ２の読み取り効率を向上できる。しかも、支持台４の上に線状導体からなる無給電素子８を配置するのみで収納ケース３自体は単純な箱であり、全体の構成を簡単化できる。   In this way, by arranging a plurality of parasitic elements 8 made of linear conductors at predetermined intervals on the support base 4 on which the storage case 3 that stores a large number of envelopes 11 with wireless tags is placed, the storage case 3 Even if the stored envelopes 11 overlap, the ID and data of each wireless tag 2 can be read correctly, and the reading efficiency of the wireless tag 2 can be improved. Moreover, the storage case 3 itself is a simple box simply by disposing the parasitic element 8 made of a linear conductor on the support base 4, and the overall configuration can be simplified.

また、支持台４の上に配置する無給電素子８の長さＬ、隣接する無給電素子８との間隔Ｄ、配置する無給電素子８の本数を適当に設定することで、収納ケース３内の全ての封筒１１に取り付けられた無線タグ２からＩＤやデータを正しく読み取ることができる最大読取可能距離を任意に設定することができる。   Further, by appropriately setting the length L of the parasitic elements 8 arranged on the support 4, the distance D between adjacent parasitic elements 8, and the number of parasitic elements 8 to be arranged, The maximum readable distance at which IDs and data can be correctly read from the wireless tags 2 attached to all the envelopes 11 can be arbitrarily set.

なお、この実施の形態では収納ケース３を載せる支持台４の上に無給電素子８を配置したがこれに限定するものではなく、例えば、収納ケース３の底面の内側あるいは外側に設けてもよく、要は、リーダ・アンテナ５と無線タグ２との間に位置するのであればどこに設けても構わない。   In this embodiment, the parasitic element 8 is disposed on the support base 4 on which the storage case 3 is placed. However, the present invention is not limited to this. For example, it may be provided inside or outside the bottom surface of the storage case 3. In short, it may be provided anywhere as long as it is located between the reader / antenna 5 and the wireless tag 2.

また、この実施の形態において、無給電素子８の長さは波長の３分の１程度にするのが最適として説明したが、無給電素子を取り付ける部材の誘電率により最適な長さは変化する。このため、常に波長の３分の１の長さが最適であるとは限らない。   In this embodiment, it has been described that the length of the parasitic element 8 is optimally about one third of the wavelength. However, the optimum length varies depending on the dielectric constant of the member to which the parasitic element is attached. . For this reason, a length of one third of the wavelength is not always optimal.

（第２の実施の形態）
なお、前述した実施の形態と同一の部分には同一の符号を付し詳細な説明は省略する。
図９に示すように、支持台４の上に複数の線状の導体を交差させて格子状にした無給電素子８１を配置している。すなわち、無給電素子８１は、図１０に示すように縦と横の寸法が共にａで等しい正方形状になっている。この寸法ａは通信周波数の約３分の１の長さにしている。通信周波数を２．４５ＧＨｚとすれば波長は１２２．４mmとなるので、この場合にはａ＝４０mmにしている。 (Second Embodiment)
Note that the same reference numerals are given to the same portions as those of the above-described embodiment, and detailed description thereof is omitted.
As shown in FIG. 9, a parasitic element 81 is arranged on the support base 4 by crossing a plurality of linear conductors into a lattice shape. That is, the parasitic element 81 has a square shape whose vertical and horizontal dimensions are both equal to a as shown in FIG. This dimension a is about one third of the communication frequency. If the communication frequency is 2.45 GHz, the wavelength is 122.4 mm. In this case, a = 40 mm.

そして、図１１に示すようにスペーサ９を使用せずに無線タグ２を貼り付けたのみの封筒１を例えば３０枚重なるように並べて収納ケース（図示せず）に収納し、この収納ケースを、無給電素子８１を配置した支持台４の上に載置する。そして、質問器７がリーダ・アンテナ５によって各無線タグ２からＩＤやデータを読み取る。なお、図１１では全体を横にしているがこれは無給電素子８１の配置状態を示すためで、実際には図９に示すようになっている。各封筒１はスペーサ９を取り付けていないので、封筒間の間隔は約１mmであり、３０枚重ねた全体の幅は約３０mmとなる。   Then, as shown in FIG. 11, the envelopes 1 in which only the wireless tag 2 is attached without using the spacers 9 are arranged so as to overlap, for example, 30 sheets, and are stored in a storage case (not shown). It is placed on the support 4 on which the parasitic element 81 is disposed. Then, the interrogator 7 reads the ID and data from each wireless tag 2 by the reader / antenna 5. In FIG. 11, the whole is set sideways, but this is to show the arrangement state of the parasitic element 81, and is actually as shown in FIG. 9. Since each of the envelopes 1 is not provided with the spacer 9, the interval between the envelopes is about 1 mm, and the total width of the 30 sheets is about 30 mm.

このような構成における読み取り結果を図１２に示す。なお、この図では３０枚の封筒１の無線タグ２に対して１〜３０の番号を付し、ＩＤの読み取りができたものを「１」、読み取りができなかったものを「０」として表わしている。この結果から、リーダ・アンテナ５と支持台４の下面との間の距離が１５mm〜２５mmの範囲において３０枚の封筒１に取り付けられている無線タグ２のすべてからＩＤの読み取りができたことがわかる。   FIG. 12 shows the reading result in such a configuration. In this figure, the numbers 1 to 30 are assigned to the wireless tags 2 of 30 envelopes 1, and IDs that can be read are indicated as “1” and those that cannot be read are indicated as “0”. ing. From this result, it was confirmed that the ID could be read from all of the wireless tags 2 attached to the 30 envelopes 1 within a distance of 15 mm to 25 mm between the reader / antenna 5 and the lower surface of the support base 4. Understand.

上記においては無給電素子８１の寸法aを４０mmとして説明したが、図１３は無線タグ２を貼り付けた封筒１を１mm間隔で１００枚並べた状態で、無給電素子８１の寸法aを３４mm、３６mm、３８mm、４０mm、４２mmと変化させ、それぞれの寸法においてリーダ・アンテナ５と支持台４の下面との間の距離を０〜１００mmまで５mmステップで変化させ、各距離にて無線タグのＩＤを読み取った読取枚数を合計したのべ読取枚数を示すグラフである。   In the above description, the dimension “a” of the parasitic element 81 is 40 mm, but FIG. 13 illustrates that the dimension “a” of the parasitic element 81 is 34 mm in a state where 100 envelopes 1 with the wireless tag 2 attached are arranged at intervals of 1 mm. 36mm, 38mm, 40mm and 42mm, and the distance between the reader antenna 5 and the lower surface of the support base 4 is changed in 5mm steps from 0 to 100mm in each dimension, and the ID of the wireless tag is changed at each distance. It is a graph which shows the total number of read sheets which read the total number of read sheets.

図１３の結果からわかるように、寸法aが３８mm前後のときに最も読み取りが良好となる。また、寸法ａが４２mmになると急激にのべ読取枚数は低下する。この場合、通信周波数は２．４５ＧＨｚであり、その波長の約３分の１の長さは４０．８mmである。従って、無給電素子８１の寸法aを通信周波数の波長の約３分の１にするか、それよりも若干短くすることで無線タグ２の読み取りが良好となることがわかる。   As can be seen from the results of FIG. 13, reading is best when the dimension a is around 38 mm. Further, when the dimension a is 42 mm, the total number of read sheets is rapidly reduced. In this case, the communication frequency is 2.45 GHz, and the length of about one third of the wavelength is 40.8 mm. Accordingly, it can be seen that the wireless tag 2 can be read well by setting the dimension a of the parasitic element 81 to about one third of the wavelength of the communication frequency or slightly shorter than that.

このように、複数の線状の導体を交差させて格子状にした無給電素子８１を支持台４上に配置することにより、無線タグ２の間隔が１mmというような非常に近接して重なった場合にもデータを読み取ることができ、読取性能の向上を図ることができる。   Thus, by arranging the parasitic element 81 in a lattice shape by crossing a plurality of linear conductors on the support base 4, the wireless tags 2 overlap each other very closely such as 1 mm. Even in this case, data can be read, and reading performance can be improved.

次にスペーサ９を使用せずに無線タグ２を貼り付けたのみの封筒１を重ね、しかも無給電素子を配置し無い場合において、各無線タグ２からどの程度ＩＤが読み取れるかについて行った実験の結果について述べる。   Next, in the experiment conducted on how much ID can be read from each wireless tag 2 when the envelope 1 with only the wireless tag 2 attached without using the spacer 9 is stacked and the parasitic element is not disposed. Describe the results.

すなわち、図１４に示すように、無線タグ２を貼り付けたのみの封筒１を３０枚重なるように並べて収納ケース（図示せず）に収納し、この収納ケースを、無給電素子を配置していない支持台（図示せず）の上に載置する。そして、リーダ・アンテナ５によって各無線タグ２からデータを読み取る。   That is, as shown in FIG. 14, 30 envelopes 1 each having only a wireless tag 2 attached are arranged side by side so as to overlap each other and stored in a storage case (not shown), and a parasitic element is disposed in the storage case. Place on a non-supporting base (not shown). Then, data is read from each wireless tag 2 by the reader / antenna 5.

このような構成における読み取り結果を図１５に示す。この結果から、例えばリーダ・アンテナ５と支持台４の下面との間の距離が４０mmの場合、３０枚の無線タグ２の中でＩＤが読み取れたものが１１枚のみであった。このように、無給電素子を配置しない場合には、重なっている封筒１の無線タグ２のすべてからＩＤを読み取ることは不可能である。   FIG. 15 shows the reading result in such a configuration. From this result, for example, when the distance between the reader / antenna 5 and the lower surface of the support base 4 is 40 mm, only 11 of the 30 wireless tags 2 were able to read the ID. In this way, when no parasitic element is arranged, it is impossible to read the ID from all the wireless tags 2 of the envelope 1 that overlap.

次に、スペーサ９を使用せずに無線タグ２を貼り付けたのみの封筒１を重ね、これを第１の実施の形態における線状の導体からなる無給電素子８を平行に配置したのみの場合において、各無線タグ２からどの程度ＩＤが読み取れるかについて行った実験の結果について述べる。   Next, the envelope 1 in which only the wireless tag 2 is attached without using the spacer 9 is overlapped, and the parasitic element 8 composed of the linear conductor in the first embodiment is simply arranged in parallel. In this case, the result of an experiment conducted on how much ID can be read from each wireless tag 2 will be described.

すなわち、図１６に示すように、スペーサ９を使用せずに無線タグ２を貼り付けたのみの封筒１を１mm間隔で３０枚重なるように並べて収納ケース（図示せず）に収納し、この収納ケースを、線状の導体からなる無給電素子８を例えば４本平行に配置した支持台４の上に載置する。そして、リーダ・アンテナ５によって各無線タグ２からＩＤを読み取る。   That is, as shown in FIG. 16, the envelopes 1 with only the wireless tag 2 attached without using the spacers 9 are arranged in a storage case (not shown) so as to overlap each other at an interval of 1 mm. The case is placed on a support base 4 in which, for example, four parasitic elements 8 made of linear conductors are arranged in parallel. Then, the ID is read from each wireless tag 2 by the reader / antenna 5.

このような構成における読み取り結果を図１７に示す。線状の導体からなる無給電素子８を配置した場合、封筒１に厚さ３mmのスペーサ９を取り付けて無線タグ２の間隔を３mm以上にした場合には問題なく全ての無線タグ２からＩＤを読み取ることができたが、スペーサを使用せずに重ねた場合には無線タグ２の間隔が１mm程度しかなく、この場合には最大でも半数程度しか読み取りができなかった。   The reading result in such a configuration is shown in FIG. When the parasitic element 8 made of a linear conductor is arranged, when the spacer 9 having a thickness of 3 mm is attached to the envelope 1 and the distance between the wireless tags 2 is set to 3 mm or more, the IDs are received from all the wireless tags 2 without any problem. Although it was possible to read, when the data was stacked without using a spacer, the distance between the wireless tags 2 was only about 1 mm. In this case, only about half of the maximum could be read.

このように、スペーサを使用せずに無線タグ２を貼り付けたのみの封筒１を１mm間隔で並べて収納ケースに収納するような場合でも、支持台４の上に複数の線状の導体を交差させて格子状にした無給電素子８１を配置することで、全ての無線タグ２からＩＤやデータを読み取ることが可能になる。   As described above, even when the envelopes 1 with only the wireless tag 2 attached without using a spacer are arranged at intervals of 1 mm and stored in the storage case, a plurality of linear conductors are crossed on the support base 4. By disposing the parasitic element 81 in a lattice shape, IDs and data can be read from all the wireless tags 2.

なお、この実施の形態では無給電素子として、複数の線状の導体を交差させて格子状にした無給電素子８１を配置した場合について述べたが、他の構成であっても１mm間隔で重ねた封筒１の無線タグ２からデータを読み取ることができる。すなわち、図１８の(a)に示すように面状導体で四角形などの角形のものや、(b)に示すように面状導体で円形のものや、(c)に示すように面状導体で角形のものから４つの角と対向する一対の辺の一部を切り取った形状のものであっても格子状の無給電素子８１と同等の機能が得られる。また、図１８の(d)に示すように格子状に配置した線状導体で囲まれた一部を面状の導体で埋めたものや、(e)に示すように複数の線状の導体を交差させて格子状にしたものを傾けた形状のものであっても無給電素子８１と同等の機能が得られる。   In this embodiment, the parasitic element 81 in which a plurality of linear conductors are crossed to form a grid is arranged as the parasitic element. However, even in other configurations, the parasitic elements 81 are overlapped at intervals of 1 mm. Data can be read from the wireless tag 2 of the envelope 1. That is, as shown in FIG. 18 (a), the planar conductor is rectangular such as a square, the planar conductor is circular as shown in (b), or the planar conductor is as shown in (c). Even in the case of a shape obtained by cutting out part of a pair of sides facing the four corners from a square shape, a function equivalent to that of the lattice-shaped parasitic element 81 can be obtained. Further, as shown in FIG. 18 (d), a part surrounded by a linear conductor arranged in a grid is filled with a planar conductor, or a plurality of linear conductors as shown in (e). A function equivalent to that of the parasitic element 81 can be obtained even in a shape in which a lattice shape is formed by crossing.

また、上記実施の形態では、格子状の無給電素子８１は縦と横の寸法が共にａで等しい正方形状としたが、厳密な正方形状である必要はなく、また、縦と横の寸法が異なっていても構わない。   In the above-described embodiment, the lattice-shaped parasitic element 81 has a square shape in which the vertical and horizontal dimensions are both equal to a. However, the lattice-shaped parasitic element 81 does not have to be a strict square shape, and has a vertical and horizontal dimension. It can be different.

また、この実施の形態において、無給電素子８１の寸法ａは波長の３分の１程度にすることにより読み取りが良好となることを示したが、無給電素子８１を取り付ける部材の誘電率により最適な長さは変化する。このため、常に波長の３分の１の長さが最適であるとは限らない。   Further, in this embodiment, it has been shown that the dimension “a” of the parasitic element 81 is approximately one third of the wavelength, so that the reading is good. The length varies. For this reason, a length of one third of the wavelength is not always optimal.

（第３の実施の形態）
なお、この実施の形態は無線タグ２を貼り付けた郵便封筒１を重ねて収納する収納ケースの変形例について述べる。
図１９に示す収納ケース３１は、内部の底面３１ａを階段状に形成したもので、その底面の断面を示すと図２０に示すように同じ方向に複数の階段を繰り返し配置する構成になっている。この収納ケース３１に無線タグ２を貼り付けた郵便封筒１を多数重なるように並べて収納すると、図２１に示すように、各封筒１は上下方向の位置が底面の段差に応じてずれる。 (Third embodiment)
In this embodiment, a modified example of a storage case that stores the postal envelope 1 with the wireless tag 2 attached in a stacked manner will be described.
A storage case 31 shown in FIG. 19 has an inner bottom surface 31a formed in a staircase shape. When a cross section of the bottom surface is shown, a plurality of steps are repeatedly arranged in the same direction as shown in FIG. . When a large number of postal envelopes 1 with the wireless tag 2 attached thereto are arranged and stored in the storage case 31, the vertical positions of the envelopes 1 are shifted according to the level difference on the bottom as shown in FIG.

このように、封筒１の上下方向の位置が底面の段差に応じてずれることから、各封筒１の同じ位置に貼り付けられた無線タグ２も上下にずれることになる。従って、各封筒１が１mm間隔で重なっていても隣接した無線タグ２では上下の位置にずれがあるので、ずらさずに重なっている場合に比べて無線タグからのデータの読み取りは確実にできるようになる。すなわち、無線タグの読み取り性能を向上させることができる。   Thus, since the vertical position of the envelope 1 is shifted according to the level difference on the bottom surface, the wireless tag 2 attached to the same position of each envelope 1 is also shifted vertically. Therefore, even if the envelopes 1 are overlapped at an interval of 1 mm, the adjacent wireless tags 2 are displaced in the upper and lower positions, so that data can be read from the wireless tags more reliably than when they are overlapped without being shifted. become. That is, the reading performance of the wireless tag can be improved.

また、このように無線タグ２を上下にずらすことによって線状の導体からなる無給電素子８を複数本並行に配置した場合においてもスペーサを使用せずに全ての無線タグ２からデータを読み取ることが可能になる。   Further, even when a plurality of parasitic elements 8 made of linear conductors are arranged in parallel by shifting the wireless tag 2 up and down in this way, data is read from all the wireless tags 2 without using a spacer. Is possible.

また、図２２に示す収納ケース３２は、内部の底面３２ａを斜面状に形成したもので、同じ方向に複数の斜面を繰り返し配置する鋸歯状の構成になっている。
このような構成の収納ケース３２においても無線タグ２を貼り付けた郵便封筒１を多数重なるように並べて収納すると、各封筒１は上下方向の位置が底面の斜面に応じてずれる。従って、各封筒１の同じ位置に貼り付けられた無線タグ２も上下にずれることになり、この場合もずらさずに重なっている場合に比べて無線タグからのデータの読み取りは確実にできるようになる。 A storage case 32 shown in FIG. 22 has an inner bottom surface 32a formed in a slope shape, and has a sawtooth configuration in which a plurality of slopes are repeatedly arranged in the same direction.
Also in the storage case 32 having such a configuration, when a large number of postal envelopes 1 to which the wireless tags 2 are attached are arranged side by side and stored, the vertical positions of the envelopes 1 are shifted according to the slope of the bottom surface. Therefore, the wireless tag 2 attached to the same position of each envelope 1 also shifts up and down, and in this case as well, it is possible to reliably read data from the wireless tag as compared with the case where they overlap without shifting. Become.

この収納ケースの底面の形状としては、その他、図２３に示すように階段状であっても一部の階段の向きを変えたものや、図２４に示すように底面に高さの異なる凹凸をランダムに形成したものであってもよい。   As for the shape of the bottom surface of the storage case, in addition, even if it is stepped as shown in FIG. 23, the direction of some of the stairs is changed, or unevenness with different heights is provided on the bottom as shown in FIG. It may be randomly formed.

（第４の実施の形態）
なお、この実施の形態は無線タグ２を貼り付けた郵便封筒１の変形例について述べる。
図２５に示すように、郵便封筒１に無線タグ２の貼り付け範囲を決める枠１ａを印刷し、この枠１ａの中に無線タグ２を、(a)、(b)、(c)に示すようにランダムに貼り付ける。なお、枠１ａ内への無線タグ２の貼り付けは、人が直接行っても、また、無線タグ貼り付け装置を使って自動的に行っても良い。無線タグ貼り付け装置を使用する場合には、無線タグ貼り付け装置にあらかじめ貼り付け範囲を記憶させておき、貼り付け範囲内のランダムな位置に無線タグを貼り付けるようにプロブラミングしておくことにより実現できる。 (Fourth embodiment)
In this embodiment, a modified example of the mail envelope 1 with the wireless tag 2 attached will be described.
As shown in FIG. 25, a frame 1a for determining the attachment range of the wireless tag 2 is printed on the mail envelope 1, and the wireless tag 2 is shown in (a), (b) and (c) in this frame 1a. Paste randomly. Note that the wireless tag 2 may be pasted into the frame 1a directly by a person or automatically using a wireless tag pasting apparatus. When using a wireless tag pasting device, store the pasting range in advance in the wireless tag pasting device, and program to paste the wireless tag at random positions within the pasting range. realizable.

このように郵便封筒１に無線タグ２をランダムに貼り付けることで、図１に示したような底面が平坦な収納ケース３に多数の郵便封筒１を重なるように並べて入れても、各無線タグ２の存在する位置は異なる。すなわち、隣接する無線タグが重なり合うことはほとんど無くなる。従って、各無線タグ２からデータを確実に読み取ることが可能になり、読取性能を向上させることができる。   Thus, even if a large number of postal envelopes 1 are placed side by side in a storage case 3 having a flat bottom surface as shown in FIG. The positions where the two exist are different. That is, there is almost no overlap between adjacent wireless tags. Therefore, data can be reliably read from each wireless tag 2, and reading performance can be improved.

（第５の実施の形態）
なお、この実施の形態は支持台とこの上に配置される格子状の無給電素子８１の変形例について述べる。
前述した第２の実施の形態では、線状の導体を格子状にした無給電素子８１を使用することで、郵便封筒１に貼り付けられた無線タグ２の間隔が１mmというような非常に近接して並べた場合にも無線タグのＩＤやデータを読み取ることができ、読取性能を向上できることを述べた。 (Fifth embodiment)
In this embodiment, a modified example of the support base and the lattice-shaped parasitic element 81 disposed thereon will be described.
In the second embodiment described above, by using the parasitic element 81 in which the linear conductors are arranged in a lattice shape, the distance between the wireless tags 2 attached to the mail envelope 1 is very close to 1 mm. It has been described that the ID and data of the wireless tag can be read even when they are arranged, and the reading performance can be improved.

これは無給電素子８１の寸法ａが、重なった郵便封筒１の幅に略等しい場合には問題ないが、例えば、郵便封筒１が１００枚程度重なっている場合には各封筒間の間隔が１mmであっても全体の幅は１００mmになる。これに対して無給電素子８１の寸法ａを４０mm程度にした場合、無給電素子８１から外れた位置に並んでいる郵便封筒１が生じる。そして、このような郵便封筒１に貼り付けられている無線タグ２については読み取り性能が低下し、ＩＤやデータを読み取ることができない無線タグが発生する。   This is not a problem when the dimension a of the parasitic element 81 is substantially equal to the width of the overlapped postal envelopes 1. For example, when about 100 postal envelopes 1 overlap, the interval between the envelopes is 1 mm. Even so, the overall width is 100 mm. On the other hand, when the dimension “a” of the parasitic element 81 is set to about 40 mm, the postal envelopes 1 arranged in a position away from the parasitic element 81 are generated. And about the wireless tag 2 affixed on such a mail envelope 1, reading performance falls and the wireless tag which cannot read ID and data generate | occur | produces.

そこで、図２６に示すように、支持台４の上に溝１５を形成し、その溝１５に沿って移動する可動基材１６を設け、その可動基材１６の上に格子状の無給電素子８１を配置する。前記可動基材１６はポリカーボネート製など非金属製のもので、可動機構（図示せず）により溝１５に沿って自動的に移動するようになっている。
そして、支持台４の上に、図２７に示すように、無線タグを貼り付けた郵便封筒１を多数重なるように並べて収納した収納ケース３を、郵便封筒１の並びの方向が可動基材１６の移動方向と一致するようにして載せる。 Therefore, as shown in FIG. 26, a groove 15 is formed on the support base 4, a movable base material 16 that moves along the groove 15 is provided, and a lattice-shaped parasitic element is provided on the movable base material 16. 81 is arranged. The movable base 16 is made of non-metal such as polycarbonate, and is automatically moved along the groove 15 by a movable mechanism (not shown).
Then, as shown in FIG. 27, a storage case 3 in which a large number of postal envelopes 1 attached with wireless tags are arranged and stored on a support base 4 is stored in a movable base 16. Place it so that it matches the direction of movement.

このような構成においては、可動基材１６を溝１５に沿って一方の端から他方の端に移動させつつリーダ・アンテナ５によって各郵便封筒１の無線タグ２からＩＤやデータを読み取る。すなわち、可動基材１６が通過する位置には格子状の無給電素子８１が配置されているので、その上に位置する無線タグ２からは確実にＩＤやデータを読み取ることができる。従って、可動基材１６が溝１５に沿って一方の端から他方の端へ移動することで収納ケース３内の郵便封筒１に貼り付けられている無線タグの全てからＩＤやデータを確実に読み取ることができる。   In such a configuration, the ID and data are read from the wireless tag 2 of each mail envelope 1 by the reader / antenna 5 while moving the movable base material 16 along the groove 15 from one end to the other end. That is, since the lattice-shaped parasitic element 81 is disposed at the position through which the movable base material 16 passes, the ID and data can be reliably read from the wireless tag 2 positioned thereon. Accordingly, the movable base material 16 moves from one end to the other end along the groove 15 so that the ID and data are surely read from all of the wireless tags attached to the mail envelope 1 in the storage case 3. be able to.

なお、ここでは可動基材１６を移動させながら無線タグを読み取るようにしたが、可動基材１６を一旦静止させて無線タグを読み取り、その後移動させてから再び静止させて無線タグを読み取ることを繰り返す方法であってもよい。
また、ここでは無給電素子８１を配置した可動基材１６を移動させるようにしたが、無給電素子８１を支持台４の上に固定し、収納ケース３を支持台４の上で移動させるようにしても同様の効果が得られる。 In this case, the wireless tag is read while moving the movable base material 16, but the movable base material 16 is temporarily stopped to read the wireless tag, and then moved and then stopped again to read the wireless tag. It may be a method of repeating.
Here, the movable base material 16 on which the parasitic element 81 is arranged is moved. However, the parasitic element 81 is fixed on the support base 4 and the storage case 3 is moved on the support base 4. However, the same effect can be obtained.

本発明の、第１の実施の形態に係る全体構成を示す図。The figure which shows the whole structure which concerns on 1st Embodiment of this invention. 同実施の形態における無線タグ付き封筒を示す斜視図。The perspective view which shows the envelope with a radio | wireless tag in the embodiment. 同実施の形態における無給電素子の配置状態を示す図。The figure which shows the arrangement | positioning state of the parasitic element in the embodiment. 同実施の形態において無給電素子の長さＬを変化させたときの、長さＬと最大読取距離との関係の一例を示したグラフ。The graph which showed an example of the relationship between length L and the maximum reading distance when changing the length L of a parasitic element in the embodiment. 同実施の形態において無給電素子の間隔Ｄを変化させたときの、間隔Ｄと最大読取距離との関係の一例を示したグラフ。The graph which showed an example of the relationship between the space | interval D and the maximum reading distance when changing the space | interval D of a parasitic element in the same embodiment. 同実施の形態において無給電素子の本数を変化させたときの、本数と最大読取距離との関係の一例を示したグラフ。The graph which showed an example of the relationship between the number and the maximum reading distance when changing the number of parasitic elements in the embodiment. 同実施の形態において約３mm間隔で並べた無線タグ付き封筒に対して約７mm間隔で１４本の無給電素子を配置した状態を示す斜視図。The perspective view which shows the state which has arrange | positioned 14 parasitic elements by about 7 mm space | interval with respect to the envelope with a radio | wireless tag arranged in about 3 mm space | interval in the same embodiment. 同実施の形態において約３mm間隔で並べた無線タグ付き封筒に対して約７mm間隔で６本の無給電素子を配置した状態を示す斜視図。The perspective view which shows the state which has arrange | positioned six parasitic elements by about 7 mm space | interval with respect to the envelope with a wireless tag arranged in about 3 mm space | interval in the same embodiment. 本発明の、第２の実施の形態に係る全体構成を示す図。The figure which shows the whole structure which concerns on 2nd Embodiment of this invention. 同実施の形態で使用する無給電素子の構成を示す図。The figure which shows the structure of the parasitic element used in the embodiment. 同実施の形態においてスペーサを使用しない封筒を並べた場合の無線タグのデータ読取り例を示す概略構成図。The schematic block diagram which shows the data reading example of the wireless tag at the time of arranging the envelope which does not use a spacer in the embodiment. 図１１の構成におけるデータ読取結果を示す図。The figure which shows the data reading result in the structure of FIG. 同実施の形態において無給電素子の寸法を変化させ、それぞれの寸法においてリーダ・アンテナと無線タグ間の距離を変化させ、各距離にて無線タグを読み取った読取枚数を合計したのべ読取枚数を示すグラフ。In the same embodiment, the dimension of the parasitic element is changed, the distance between the reader / antenna and the wireless tag is changed in each dimension, and the total number of readings obtained by reading the wireless tag at each distance is calculated as the total number of readings. Graph showing. スペーサを使用しない封筒を並べた場合で、無給電素子を使用しないで無線タグのデータ読み取りを行う場合の概略構成図。The schematic block diagram in the case of reading the data of a wireless tag, without using a parasitic element, when arranging envelopes that do not use spacers. 図１４の構成におけるデータ読取結果を示す図。The figure which shows the data reading result in the structure of FIG. スペーサを使用しない封筒を並べた場合で、線状の導体からなる無給電素子を使用して無線タグのデータ読み取りを行う場合の概略構成図。The schematic block diagram in the case of reading the data of a radio | wireless tag using the parasitic element which consists of a linear conductor at the time of arranging the envelope which does not use a spacer. 図１６の構成におけるデータ読取結果を示す図。The figure which shows the data reading result in the structure of FIG. 同実施の形態における無給電素子の各種変形例を示す図。The figure which shows the various modifications of the parasitic element in the embodiment. 本発明の、第３の実施の形態に係る収納ケースの底面構成を示す斜視図。The perspective view which shows the bottom face structure of the storage case which concerns on 3rd Embodiment of this invention. 同実施の形態における底面構成を示す断面図。Sectional drawing which shows the bottom face structure in the embodiment. 同実施の形態において収納ケースに郵便封筒を収納した状態を示す図。The figure which shows the state which accommodated the mail envelope in the storage case in the embodiment. 同実施の形態における収納ケースの底面構成の変形例を示す斜視図。The perspective view which shows the modification of the bottom face structure of the storage case in the embodiment. 同実施の形態における収納ケースの底面構成の変形例を示す断面図。Sectional drawing which shows the modification of the bottom face structure of the storage case in the embodiment. 同実施の形態における収納ケースの底面構成の変形例を示す断面図。Sectional drawing which shows the modification of the bottom face structure of the storage case in the embodiment. 本発明の、第４の実施の形態に係る郵便封筒の構成を示す図。The figure which shows the structure of the mail envelope which concerns on 4th Embodiment of this invention. 本発明の、第５の実施の形態に係る支持台の構成を示す斜視図。The perspective view which shows the structure of the support stand which concerns on the 5th Embodiment of this invention. 同実施の形態における支持台の上に郵便封筒を収納した収納ケースを載せた状態を示す斜視図。The perspective view which shows the state which mounted the storage case which accommodated the mail envelope on the support stand in the embodiment.

符号の説明Explanation of symbols

１…郵便封筒、２…無線タグ、３…収納ケース、５…リーダ・アンテナ、８…無給電素子。   DESCRIPTION OF SYMBOLS 1 ... Mail envelope, 2 ... Wireless tag, 3 ... Storage case, 5 ... Reader antenna, 8 ... Parasitic element.

Claims (10)

無線タグを取り付けた平板状の物品を複数並べて収納する収納ケースの近傍に配置されたリーダ・アンテナと、前記無線タグとリーダ・アンテナとの間に配置した無給電素子とを備え、前記リーダ・アンテナを介して前記各物品の無線タグを読み取ることを特徴とする無線タグ読取装置。   A reader / antenna disposed in the vicinity of a storage case for storing a plurality of flat articles to which a wireless tag is attached, and a parasitic element disposed between the wireless tag and the reader / antenna, A wireless tag reader, wherein the wireless tag of each article is read through an antenna. 無線タグを取り付けた平板状の物品を複数並べて収納する収納ケースと、この収納ケースの近傍に配置されたリーダ・アンテナと、前記無線タグとリーダ・アンテナとの間に配置した無給電素子とを備え、前記リーダ・アンテナを介して前記各物品の無線タグを読み取ることを特徴とする無線タグ読取装置。   A storage case for storing a plurality of flat articles to which a wireless tag is attached side by side, a reader / antenna disposed in the vicinity of the storage case, and a parasitic element disposed between the wireless tag and the reader / antenna And a wireless tag reading device, wherein the wireless tag of each article is read via the reader / antenna. 無給電素子を、収納ケースを載せる支持台の上に配置し、この支持台の下にリーダ・アンテナを配置したことを特徴とする請求項１又は２記載の無線タグ読取装置。   3. The wireless tag reader according to claim 1, wherein the parasitic element is disposed on a support base on which the storage case is placed, and a reader antenna is disposed under the support base. 無給電素子は線状の導体からなり、各無線タグの並び方向に複数、平行に並べたことを特徴とする請求項１又は２記載の無線タグ読取装置。   3. The wireless tag reading device according to claim 1, wherein the parasitic elements are made of linear conductors, and a plurality of parasitic elements are arranged in parallel in the arrangement direction of the wireless tags. 各無給電素子間の距離を、収納ケースに収納される無線タグを取り付けた平板状の物品間の最小間隔よりも大きく設定したことを特徴とする請求項４記載の無線タグ読取装置。   5. The wireless tag reading device according to claim 4, wherein a distance between the parasitic elements is set to be larger than a minimum interval between the flat articles to which the wireless tags housed in the housing case are attached. 複数の無給電素子を、無線タグを取り付けた平板状の物品を並べた全体幅よりも狭い領域に並べたことを特徴とする請求項４又は５記載の無線タグ読取装置。   6. The wireless tag reader according to claim 4, wherein the plurality of parasitic elements are arranged in an area narrower than an entire width in which flat articles to which the wireless tags are attached are arranged. 無給電素子は、線状の導体からなる素子を複数格子状に並べたもの、または、角形または円形等の面状の導体からなる素子としたことを特徴とする請求項１又は２記載の無線タグ読取装置。   3. The wireless device according to claim 1, wherein the parasitic element is an element formed by arranging a plurality of elements made of linear conductors in a lattice pattern, or an element made of a planar conductor such as a square or a circle. Tag reader. 無線タグを取り付けた平板状の物品の並び方向に移動可能な可動基材を無線タグとリーダ・アンテナとの間に配置し、この可動基材上に無線給電素子を配置したことを特徴とする請求項１、２、６又は７記載の無線タグ読取装置。   A movable base material that is movable in the arrangement direction of a flat article attached with a wireless tag is disposed between the wireless tag and a reader / antenna, and a wireless power feeding element is disposed on the movable base material. The wireless tag reader according to claim 1, 2, 6 or 7. リーダ・アンテナ上に平板状の支持体を有し、無給電素子が前記平板状の支持体に並べて配置された無線タグ読取装置の前記支持体の上に配置される収納ケースであって、
無線タグを取り付けた平板状の物品を複数並べて収納する底面に、少なくとも前後する物品に取り付けた無線タグの高さ位置を互いに異ならせるための段差を形成したことを特徴とする収納ケース。 A storage case having a flat support on a reader antenna and a parasitic element arranged on the support of the RFID tag reader arranged side by side on the flat support,
A storage case, wherein a step is formed on a bottom surface for storing a plurality of flat articles to which wireless tags are attached in order to make the height positions of wireless tags attached to at least front and rear articles different from each other. リーダ・アンテナ上に平板状の支持体を有し、無給電素子が前記平板状の支持体に並べて配置された無線タグ読取装置の前記支持体の上に配置される収納ケースに収納される物品であって、
平板状で、無線タグを予め定められた所定の範囲内のランダムな位置に取り付けたことを特徴とする物品。 An article stored in a storage case disposed on the support of the RFID tag reader having a flat support on the reader antenna and having parasitic elements arranged side by side on the flat support Because
An article which is flat and has a wireless tag attached at a random position within a predetermined range.
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US10964980B2 (en) 2014-05-30 2021-03-30 Duracell U.S. Operations, Inc. Indicator circuit decoupled from a ground plane
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US10818979B2 (en) 2016-11-01 2020-10-27 Duracell U.S. Operations, Inc. Single sided reusable battery indicator
US10971769B2 (en) 2016-11-01 2021-04-06 Duracell U.S. Operations, Inc. Reusable battery indicator with electrical lock and key
US11024892B2 (en) 2016-11-01 2021-06-01 Duracell U.S. Operations, Inc. Dual sided reusable battery indicator
US11024891B2 (en) 2016-11-01 2021-06-01 Duracell U.S. Operations, Inc. Reusable battery indicator with lock and key mechanism
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US10608293B2 (en) 2016-11-01 2020-03-31 Duracell U.S. Operations, Inc. Dual sided reusable battery indicator
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US11696942B2 (en) 2016-11-01 2023-07-11 Duracell U.S. Operations, Inc. Reusable battery indicator with electrical lock and key
US10483634B2 (en) 2016-11-01 2019-11-19 Duracell U.S. Operations, Inc. Positive battery terminal antenna ground plane
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