JP2006235946A - System for managing books, shelf board with antenna for bookshelf used in the system, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for managing books which is highly reliable for a long period of time without disturbing the normal handling of books 11. <P>SOLUTION: An electronic tag 13 is arranged on a front cover and/or a back cover of the books 11 so as to be substantially in parallel with the covers. Antennas 21 for a reader include a substantially loop shape antenna patterns 25 which are formed on shelf boards 6-8 so as to be substantially in parallel with surfaces of the shelf boards 6-8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, the reader antenna provided on the shelf of the bookshelf performs wireless communication with an electronic tag provided on the books arranged on the shelf of the bookshelf, thereby managing the books. It is about the system. The present invention also relates to a shelf board used for arranging books stored in a bookshelf and provided with a reader antenna, and a manufacturing method thereof.

  In the text, “books” means not only books but also newspapers, magazines, materials, documents, other paper media, and document binding files created by binding such paper media with a binder. In addition, optical recording media such as CD and DVD, and magnetic recording media such as video tape and audio tape are also included.

  Conventionally, as a book management system such as a library, a bar code is pasted on the front cover (that is, the front cover or back cover) of each book, and the bar code reader scans the bar code for the information. A system for managing books by taking them into a computer has become widespread.

  On the other hand, in recent years, as a management system for entry / exit of goods such as goods, inventory, sales, etc., it has been possible to record a large amount of information in a contactless manner instead of a system using conventional tags, shelf labels, barcodes, etc. RFID (Radio Frequency Identification) systems that can be used are being adopted in various fields. This RFID system includes an electronic tag attached to the article side and a reader / writer equipped with an antenna for communicating with the electronic tag by wireless communication. This electronic tag is also called a wireless tag or an IC tag, and is composed of communication circuits each including an IC chip incorporating a memory in which information is recorded and a small antenna. Since the reader / writer is usually a fixed station, the reader / writer antenna is generally fixed. When the electronic tag attached to the article or its storage case approaches the reader / writer antenna, information can be exchanged between the two.

Recently, it has also been proposed to manage books in a library or the like using such an RFID system. Specifically, the reader / writer antenna installed in the bookcase for storing books performs wireless communication with the electronic tag attached to the back cover of the book, so that the reader / writer antenna and the electronic tag that records information are connected. Systems have been developed to exchange information between them. For example, in Japanese Patent Application Laid-Open No. 2004-269079, an electronic tag on which information is recorded is attached to a back cover of a book, and a substantially rectangular simple loop type reader / writer antenna is provided on the shelf of the bookshelf. A system for managing books by communicating with an electronic tag of a book placed on the above and an antenna for a reader / writer by an electromagnetic induction method is disclosed.
JP 2004-269079 A

Also, in Japanese Patent Application Laid-Open Nos. 2003-72919 and 2003-252409, communication can be performed between an electronic tag attached to the cover of a book and a reader / writer antenna with the same system. Each is disclosed. In the case of the book management system disclosed in Japanese Patent Laid-Open No. 2003-72919, each reader / writer antenna has a substantially loop shape formed in a substantially rectangular, circular or linear shape, A plurality of reader / writer antennas and a switching unit are arranged by slightly shifting the reader / writer antennas to a common surface (that is, the back surface, bottom surface, or top surface) of the book storage space of the bookshelf. Are connected to each other by a connecting line having the same length. The reader / writer antenna can communicate with the electronic tag of the book at any position on the shelf of the bookshelf by sequentially switching the antenna that performs the communication operation among the plurality of reader / writer antennas. . Further, in the case of the book management system disclosed in the above Japanese Patent Application Laid-Open No. 2003-252409, the reader / writer antenna is formed on a substrate constituting the antenna module, and this substrate is disposed on the back of the bookshelf. ing. In addition, the electronic tag attached to the cover of the book has an air core coil wound in a flat shape and a plate-like shape inserted in the air core coil so as to be parallel to the plane of the air core coil. Made of iron core. The book is managed by communicating with the reader / writer antenna using the electronic tag.
JP 2003-72919 A JP 2003-252409 A

However, the book management system disclosed in Japanese Patent Application Laid-Open No. 2004-269079 has the following problems (A) to (D). The reason why these problems occur is as described in the items (a) to (d) described sequentially after the descriptions of the items (A) to (D).
(A) It is easy for a person to recognize the matter described in the book arranged on the shelf board of a bookshelf by the electronic tag affixed on the spine of the book.
(A) In a library or the like, since the classification of books is progressing, it is known in which bookshelf the target book is located, but it is a person who searches the bookcase for the target book. A person looks for information such as a signature, an author name, and a classification mark affixed to the back cover of a book arranged on the shelf of the book shelf, and searches for the target book. However, when the electronic tag is affixed to the back cover of the book, such information may be at least partially hidden.
(B) It may be difficult to attach an electronic tag to the spine of a book.
(B) The antenna of the electronic tag needs a size of about several centimeters in order to transmit / receive radio waves to / from the reader / writer antenna located at a slightly separated position, and is thinner than such a size. It is difficult to attach an electronic tag to the back cover of a book. Further, in the case of a document binding file in which documents are bound by a ring constituting a binder, it is difficult to attach an electronic tag to the back cover of such a document binding file.
(C) The electronic tag is easily peeled off from the back cover of the book.
(C) The back cover of the book is connected to the front and back covers, and deforms as the book is opened and closed, so the electronic tag attached to the back cover opens and closes the book. It may be peeled off by repeating.
(D) The IC chip in the electronic tag attached to the spine of the book is likely to break down.
(D) The back cover of the book to which the electronic tag is attached is not necessarily flat, and in the case of a book having a certain thickness, many of the books have a curved surface, so the electronic tag is attached to the back cover with good adhesion. In such a case, bending stress is easily applied to the electronic tag. In addition, when a book is placed on a desk and opened, a load is easily applied to the spine, so that the electronic tag is deformed and stress is easily applied to the electronic tag, and the electronic tag is easily subjected to an impact.
JP 2004-269079 A

  In order to solve the problems as described in the above items (A) to (D), an electronic tag is attached to the front cover surface or back cover surface of a book as in the case of a barcode method that has been widely used. It is desirable to paste. However, when the electronic tag is attached to the front or back cover of the book, if the reader / writer antenna is a simple loop antenna such as a substantially rectangular shape, as will be described later with reference to FIGS. However, there is a problem that communication can be made only with books stored near the left and right ends of the book storage space of the bookshelf as viewed from the book take-out side.

Another object of the book management system disclosed in Japanese Patent Application Laid-Open No. 2003-72919 is to reduce a non-communication area where the reader / writer antenna cannot communicate with the electronic tag of the book. However, in the case of this book management system, it is necessary to provide a large number of reader / writer antennas in the book storage space of each stage of a book shelf of a certain length generally used in libraries and the like. Since switching means for performing control for sequentially switching the antennas for communication among the reader / writer antennas is also necessary, there is a problem that the cost increases. In order to reduce such problems, when the area of each loop of a loop-type reader / writer antenna formed in a substantially square, circular or linear shape is increased, these antennas may not be used. Since the magnetic field of the entire book storage space cannot be compensated, there is a problem in that an incommunicable area is generated in which the antenna cannot read the information of the electronic tag of the book.
JP 2003-72919 A

Furthermore, in the case of the book management system disclosed in Japanese Patent Application Laid-Open No. 2003-252409, a substrate constituting the antenna module is required separately from a normal bookcase, and a special one having a plate-shaped iron core. There is a problem that it is necessary to use an electronic tag.
JP 2003-252409 A

  The present invention has been invented to solve the problems as described above, and does not hinder the normal handling of books, and is highly reliable in the long term. It is an object of the present invention to provide a shelf board with an antenna for a book shelf used in such a management system and a manufacturing method thereof.

  According to the first aspect of the present invention, books are managed by performing wireless communication with an electronic tag provided on books placed on a shelf of a bookshelf with a reader antenna. In this system, the electronic tag is provided on the front cover and / or back cover so that the electronic tag is substantially parallel to the front cover and / or back cover of the books, and the reader antenna is provided on the surface of the shelf board. And a substantially loop-shaped antenna pattern provided on the shelf so as to be substantially parallel to the shelf board. In the first aspect of the present invention, the shelf pattern is formed so that the antenna pattern does not have an intersecting portion in a projection view of the shelf plate viewed from the upper surface (in other words, in plan view). At least a part of at least one pattern portion that is configured in a substantially loop shape substantially along the outer periphery and extends in the direction of the front edge of the shelf plate of the substantially loop-shaped antenna pattern is a depth of the shelf plate. It is preferable to have a bent portion that is bent in the direction. In the first aspect of the present invention, the electronic tag can be attached not only to the outer surface and / or inner surface of the front cover and / or back cover of books, but also to the front cover and / or back. It can also be embedded in an intermediate portion in the thickness direction of the cover. Further, in the first aspect of the present invention, the reader antenna preferably serves also as a reader / writer antenna, and a portion of the reader / writer other than the reader / writer antenna ( In other words, the reader / writer main body is also preferably provided on the bookcase.

  According to a second aspect of the present invention, in a shelf board used for arranging books stored in a bookshelf and provided with a reader antenna, the reader antenna has a substantially loop shape. The antenna pattern is configured in a substantially loop shape substantially along the outer periphery of the shelf so as not to have an intersecting portion in plan view and substantially parallel to the surface of the shelf. Of the substantially loop-shaped antenna pattern, at least a part of at least one pattern portion extending substantially in the direction of the front of the shelf has a bent portion bent in the depth direction of the shelf. The present invention relates to a shelf board with an antenna for a bookcase.

  Furthermore, according to the third aspect of the present invention, a plurality of (for example, two) reader antennas are used in common for books to be stored in a bookshelf arranged on the bookshelf. A shelf board manufacturing method, wherein the substantially loop-shaped antenna pattern of each of the plurality of reader antennas has no crossing portion when seen in a plan view. It is configured in a substantially loop shape substantially along the outer periphery of the shelf so as to be substantially parallel to the surface of the plate, and in the shelf, the shelf plate of each of the substantially loop-shaped antenna patterns is formed. At least a part of at least one pattern portion extending substantially in the frontage direction has a bent portion bent in the depth direction of the shelf board, and the shelf board includes a plurality of reader antennas. Each of the substantially loop-shaped antenna patterns is viewed in a plan view so as to compensate for the incommunicable areas on the shelf, and the bent portions are shifted from each other in the direction of the shelf. In the manufacturing method of the shelf with antennas for bookshelves arranged respectively, for each of the plurality of reader antennas, the communication area and / or the communication inability area with the electronic tag is measured over almost the entire area of the shelf. The plurality of reader antennas so that the communicable areas of some of the plurality of reader antennas supplement the remaining several incommunicable areas of the plurality of reader antennas. The present invention relates to a method for manufacturing a shelf board with antennas for bookcases, wherein a plurality of reader antennas are arranged in common on the shelf board.

  In the first to third aspects of the present invention, the bent portion is inclined in an angle range of 40 ° to 140 ° (more preferably, 50 ° to 130 °) with respect to the opening direction of the shelf. It preferably has a pattern site. Moreover, in the said 1st-3rd viewpoint of this invention, the said bending part has a rising part and a falling part, respectively, and these rising parts and falling parts are with respect to the opening direction of the said shelf board. It is preferable that each pattern portion is inclined in an angle range of 40 ° to 140 ° (more preferably, 50 ° to 130 °) (hereinafter referred to as “the predetermined angle range”). Furthermore, in the first to third aspects of the present invention, the antenna pattern constituting the reader antenna can be formed not only on the upper surface and / or the lower surface of the shelf board, but also in the thickness direction of the shelf board. It can also be embedded in the middle part.

  In the second and third aspects of the present invention, it is preferable that the reader antenna also serves as a reader / writer antenna. In the first to third aspects of the present invention, the shelf plate is preferably substantially rectangular and elongated in the frontage direction, but is substantially arc-shaped or substantially circular (in this case, it is a rotary type). It may be another shape such as a substantially U shape or a substantially V shape.

  In the first to third aspects of the present invention, the bent portion may be a substantially convex shape, a substantially concave shape, a shape in which a substantially convex shape and a substantially concave shape are mixed, and specifically, The shape may be substantially triangular or substantially rectangular. Furthermore, in the first to third aspects of the present invention, at least one pattern portion extending substantially in the frontage direction of the shelf plate is a plurality of (preferably, a large number of) bends that are successively repeated. It can be comprised substantially from the part, and can also be comprised substantially from the several (preferably many) bending part repeated intermittently sequentially.

  In the first to third aspects of the present invention, a plurality of (for example, two) reader antennas are provided on a common shelf, and each of the plurality of reader antennas is substantially the same. The loop-shaped antenna patterns are arranged in a state in which the bent portions are shifted from each other in the front direction of the shelf as viewed in plan so as to compensate for the incommunicable areas on the shelf. Is preferred. In this case, it is preferable that the plurality of reader antennas operate sequentially. In addition, it is preferable that the bent portions of the substantially loop-shaped antenna patterns of the plurality of reader antennas have portions that do not overlap each other in plan view. Further, two reader antennas are provided on a common shelf plate, and each of the substantially loop-shaped antenna patterns of each of the two reader antennas is substantially equidistant along the opening direction of the shelf plate. Each having a plurality of bent portions that are substantially the same shape and arranged, and each of the plurality of bent portions has a bent pattern portion that is bent at an angle of approximately 90 ° with respect to the opening direction of the shelf, In the opening direction of the shelf, the bent pattern portions of the plurality of bent portions of the first reader antenna are sequentially approximately in the middle of the bent pattern portions of the plurality of bent portions of the second reader antenna. It is preferable that it is arranged.

  According to the first aspect of the present invention, the electronic tag is placed on the front cover and / or back cover so that the electronic tag is substantially parallel to the front cover and / or back cover of the books arranged on the shelf board of the book shelf. Because it is provided, there is no fear that recognition of the items described in the books will be hindered by the electronic tag, the attachment of the electronic tag to the books is relatively easy, and the electronic tag is difficult to peel off from the books. IC chips are hard to break down. In addition, since the antenna pattern having a substantially loop shape of the reader antenna is provided on the shelf board of the bookshelf, a normal bookshelf can be used as it is, and the structure of the bookshelf does not need to be particularly complicated.

  According to the invention described in claims 2, 7 and 12, at least one pattern extending substantially in the frontage direction of the shelf among the substantially loop-shaped antenna patterns of the reader antenna provided on the shelf. Since at least a part of the portion has a bent portion that is bent in the depth direction of the shelf board, the reader antenna is used for books as described in detail later with reference to FIGS. 9A and 9B. Wireless communication with the electronic tag provided on the front cover and / or back cover can be performed satisfactorily.

  According to the invention described in claims 3 and 8, the electronic tag provided in the books arranged on the shelf plate has at least one pattern portion extending substantially in the frontage direction of the shelf plate of the book shelf. Since it has a pattern portion that is unlikely to be 90 ° or an angle near the surface, the reader antenna can perform wireless communication with the electronic tag even better.

  Further, according to the inventions according to claims 4, 6, 9 and 10, with an antenna having a relatively simple configuration in which the area incapable of communicating with the electronic tag provided on the books arranged on the shelf board is reduced as much as possible. A shelf board can be obtained. In this case, according to the invention described in claim 5, it is possible to effectively prevent mutual interference among the plurality of reader antennas.

  Furthermore, according to the twelfth aspect of the present invention, the antenna-equipped shelf with a relatively simple configuration in which the area incapable of communicating with the electronic tag provided on the books arranged on the shelf is reduced as much as possible is relatively simple. Can be obtained through simple work.

  Next, the 1st-5th Example which applied this invention to the management system of books, respectively, "(1) 1st Example", "(2) 2nd-4th Example", The description will be divided into “(3) Experiment for measuring communicable distance” and “(4) Fifth embodiment” with reference to the drawings.

(1) 1st Example As shown in FIG. 1, the bookshelf 1 in the 1st Example shown in FIGS. 1-5 is the left side plate 2, the right side plate 3, the back plate 4, It has a substantially box-lid shape (in other words, a substantially rectangular parallelepiped shape) composed of the top plate 5 and the bottom plate 6. The pair of left and right side plates 2, 3, the back plate 4, the top plate 5 and the bottom plate 6 can be made of an appropriate material such as synthetic resin, glass, wood, etc., and the bottom plate 6 is the bottom shelf plate. Is also used. The bookshelf 1 may be provided with a front plate (not shown) which is preferably made of glass, synthetic resin or the like and is substantially transparent, and such front plate may have a pair of left and right sliding door structures. . In the illustrated embodiment, the pair of left and right side plates 2 and 3 are configured to slightly protrude downward from the bottom plate 6, and a pair of left and right support legs 9a and 9b are formed by the pair of left and right projections, respectively. Yes.

  The bookcase 1 includes an upper shelf board 7, an intermediate shelf board 8, and a lower shelf board 6 each made of a suitable non-metallic material such as glass, synthetic resin, and wood. These shelf boards 6-8 can be supported by a pair of left and right side plates 2, 3 and the like by a suitable support means (not shown).

  On the shelf boards 6-8, as shown in FIG.1 and FIG.3, the books 11 are in the length direction of these shelf boards 6-8 (in other words, the frontage direction where the frontage is extended). They are arranged and arranged sequentially. As shown in FIG. 2, these books 11 are each provided with a sheet-shaped electronic tag 13 attached to the outer surface of the front cover 12 so as to be substantially parallel to the surface of the front cover 12. As shown in FIG. 5, the electronic tag 13 has a single-turn or multiple-turn small antenna 19 whose center substantially coincides with the center of the electronic tag 13, and a memory in which information is recorded. There may be provided a communication circuit including the IC chip 20 incorporated and disposed in the central opening of the small antenna. In the illustrated embodiment, the electronic tag 13 is provided at the center lower portion of the front cover 12 as shown in FIG. In the books 11 shown in FIG. 2, 14 is a back cover, 15 is a back cover, 16 is a front edge, 17 is a sky, and 18 is the ground.

  The shelf boards 6 to 8 are substantially rectangular shapes that are elongated in the left-right direction, as shown as a shelf board 7 in FIG. 4, and the electronic tags provided on the books 11 arranged on these shelf boards 6 to 8. A reader / writer antenna 21 for communicating with the wireless communication device 13 by wireless communication is provided. A reader / writer main body 22 for exchanging information such as electrical signals with the reader / writer antenna 21 may be installed in the bookcase 1. In the illustrated embodiment, the reader / writer main body 22 is installed on the upper surface of the top plate 5 as shown in FIG. It can also be attached to the side surfaces, the top surfaces of the shelf boards 6-8, and the like. In the illustrated embodiment, the reader / writer antenna 21 is formed on the top surface of the shelf boards 6 to 8, but in order to reduce the chance of directly contacting the books 11 arranged on the shelf boards 6 to 8. For example, the upper surfaces of the shelf boards 6 to 8 including the upper surface of the reader / writer antenna 21 can be covered with an insulating film made of an appropriate insulating material. Moreover, it can also form in the lower surface of the shelf boards 6-8 by turning over and using the shelf boards 6-8, respectively. In the illustrated embodiment, the respective configurations of the shelf boards 6 to 8 are substantially the same including the shape of the antenna pattern 21, but are different from each other in terms of the shape of the antenna pattern 21 ( For example, the shelf boards 6 to 8 shown in FIGS. 6, 7, 8, and / or 12 can be mixed and used in the common bookcase 1.

  As shown in FIG. 4, the reader / writer antennas 21 provided on the shelves 6 to 8 may be of a loop type such as a one-loop, and each is composed of an antenna pattern corresponding to an electromagnetic coupling type electronic tag. Has been. The reader / writer antenna 21 may mainly be formed of a thin film such as a conductive paste formed as an antenna pattern 25 having a substantially loop shape (however, having a cut 23) on the upper surfaces of the shelf boards 6 to 8. The reader / writer antenna 21 further includes a pair of terminal portions 24 a and 24 b respectively connected to both end portions of the substantially loop-shaped antenna pattern 25 (that is, both side portions of the cut 23). The pair of terminal portions 24a and 24b may be electrically connected to the reader / writer main body 22 by appropriate lead wires (not shown). In the illustrated embodiment, the substantially loop-shaped antenna pattern 25 of the reader / writer antenna 21 is formed to have substantially the same width, and the pair of terminal portions 24a and 24b can also be provided with this substantially loop-shaped antenna pattern as necessary. 25 and substantially the same width. Therefore, as shown in FIG. 4, the antenna pattern 21 constituting the reader / writer antenna includes a substantially loop-shaped antenna pattern 25 having a cut 23 formed between both ends thereof, and the substantially loop-shaped antenna. The pattern 25 includes a pair of terminal portions 24 a and 24 b that are connected to both ends of the pattern 25.

  As shown in FIG. 4, the substantially loop-shaped antenna pattern 25 is formed so that the terminal portion 24 a is continuously provided and the pattern portion 26 located on the rear end 31 side of the shelf boards 6 to 8 and the shelf boards 6 to 8 are faced. The pattern portion 27 located on the left end 32 side, the pattern portion 28 located on the front end 33 side of the shelf boards 6 to 8, and the terminal portion 24 b are connected to each other and the right end toward the shelf boards 6 to 8. The pattern portion 29 located on the 34 side may be sequentially provided, and may be configured in a loop shape excluding the cut 23 as a whole. The substantially loop-shaped antenna pattern 25 is preferably a one-loop pattern that does not have a crossing portion where a part thereof intersects another part. In the text, “intersection” does not electrically connect, but intersects in a projection view (in other words, in plan view) when the shelf boards 6 to 8 are viewed from the upper surface. It means that.

  Each of the rear end side pattern portion 26 and the front end side pattern portion 28 is a length direction pattern portion extending in the length direction of the shelf boards 6 to 8 (in other words, the frontage direction and the normal arrangement direction of the books 11). is there. Each of the left pattern portion 27 and the right pattern portion 29 is a width direction pattern portion extending in the width direction of the shelf boards 6 to 8 (in other words, the depth direction). The rear end side pattern portion 26 extends substantially along the rear end 31 of the shelf boards 6 to 8 over substantially the entire length of the shelf boards 6 to 8. Each of the left pattern portion 27 and the right pattern portion 29 extends substantially along the left end 32 and the right end 34 of the shelf boards 6-8 over substantially the entire width of the shelf boards 6-8. Accordingly, a flat, substantially U-shaped pattern portion is formed by the length direction pattern portion 26 on the rear end side, the width direction pattern portion 27 on the left side, and the width direction pattern portion 28 on the right side except for having the cut 23. ing.

  As shown in FIG. 4, the longitudinal direction pattern portion 28 on the front end side is bent and extended in a substantially zigzag shape (in other words, substantially a sawtooth shape) over almost the entire length of the shelf boards 6 to 8, and both end portions thereof Are connected to the front end portions of the left and right width direction pattern portions 27 and 29, respectively. The longitudinal direction pattern portion 28 on the front end side is substantially composed of a large number of bent portions 35 that are successively and sequentially repeated. These many bent portions 35 protrude in a mountain shape (in other words, a convex shape) toward the rear end 31. These many bent portions 35 are formed in an approximately isosceles triangular mountain shape except for the rightmost bent portion 35a. However, only the bent portion 35a at the right end is formed in a mountain shape that is substantially equal to the shape of a substantially right triangle with a tapered shape on the left side obtained by bisecting the isosceles triangle into left and right as described above. The bent portion 35a at the right end is connected to the right pattern portion 29 via a relatively short continuous pattern portion 36 extending substantially in the length direction of the shelf boards 6-8.

  As shown in FIG. 4, the bent portions 35, 35 a can be composed of a rising portion 37 and a falling portion 38, respectively. The angle α formed by the rising portions 37 of the bent portions 35 and 35a with respect to the length direction of the shelf boards 6 to 8 is approximately 60 °. An angle β formed by the falling portion 38 of the bent portion 35 with respect to the length direction of the shelf boards 6 to 8 is approximately 120 °. An angle β formed by the falling portion 38 of the bent portion 35a with respect to the length direction of the shelf boards 6 to 8 is approximately 90 °. Therefore, each of the rising portion 37 and the falling portion 38 of the bent portions 35, 35a is the electronic tag 13 (in other words, the small antenna 19) provided on the books 11 arranged on the shelf boards 6-8. Since the pattern portion is unlikely to have an angle of 90 ° or the vicinity thereof with respect to the surface, the reader / writer antenna 21 performs wireless communication with the electronic tag 13 as described later with reference to FIGS. 9A and 9B. It can be done well.

  In FIG. 4, if a central straight line 39 passing through the center in the front-rear direction of the pattern portion 28 on the front end side is considered, the bent portions 35, 35 a have a substantially triangular shape protruding from the central straight line 39 toward the rear end 31. A mountain-shaped bent portion (in other words, a convex-shaped portion) and a substantially triangular mountain shape (in other words, a substantially triangular valley shape in FIG. 4) protruding from the center straight line 39 toward the front end 33 side. It can also be seen that each of the bent portions is constituted.

  In the first embodiment shown in FIGS. 1 to 5, the first pattern portion (that is, the bent portion) in which the pattern portion 26 on the front end side forms an angle of approximately 60 ° with respect to the length direction of the shelf boards 6 to 8. The rising portions 37 of the portions 35 and 35a and the second pattern portion having an angle of approximately 120 ° (that is, the falling portions 38 of the bent portions 35) are sequentially arranged adjacent to each other along the length direction. ing. Accordingly, the books 11 are not accurately arranged on the shelf boards 6 to 8 so as to form an angle of 90 ° with respect to the length direction of the shelf boards 6 to 8, and are slightly inclined. However, it is highly likely that at least one of the first pattern portion 37 and the second pattern portion 38 forms an angle of approximately 90 ° or the vicinity thereof with the surface of the electronic tag 13 of the books 11. For this reason, the reader / writer antenna 21 can perform wireless communication with the electronic tag 13 relatively well even if the books 11 are slightly inclined as described above. This point is the same even if the books 11 are almost completely laid down on the shelf boards 6-8.

  Therefore, in the present invention, generally, the first pattern portion 37 as described above and the second pattern portion 38 as described above are provided on the shelf boards 6 to 8 over the substantially entire length of the substantially loop-shaped portion 25. It is preferable that the shelves 6 to 8 are arranged so as to be sequentially adjacent in the length direction (in other words, the frontage direction). In this case, even if the first pattern portion 37 and the second pattern portion 38 are separated from each other in the width direction of the shelf boards 6 to 8 (in other words, the depth direction), the shelf boards 6 to 8. It is sufficient that they are adjacent to each other in the length direction. Accordingly, the first pattern portion 37 may be provided in the pattern portion 26 on the rear end side, and the second pattern portion 38 may be provided in the pattern portion 28 on the front end side.

  Furthermore, in the present invention, generally, the first pattern portion 37 has an angle of 40 ° to 85 ° (more preferably, 50 ° to 75 °) with respect to the length direction of the shelf boards 6 to 8. It is preferable that the second pattern portion 38 is inclined at a range of 95 ° to 140 ° (more preferably, 105 ° to 130 °) with respect to the length direction of the shelf boards 6 to 8. It is preferable that it is inclined. Further, the difference of the angle of the first pattern portion 37 with respect to the angle of the second pattern portion 38 is in an angle range of 20 ° to 75 ° (more preferably, 30 ° to 65 °). preferable. In this case, the first pattern portion is formed of the rising portion 37 of the bent portion 35, and the plurality of bent portions 35 of the second pattern portion formed of the falling portion 38 of the common bent portion 35 are continuously or intermittently formed. Therefore, they may be provided repeatedly in sequence.

(2) Second to Fourth Embodiments The configuration of the antenna pattern constituting the reader / writer antenna 21 provided on the shelves 6 to 8 is the same as that of the first embodiment shown in FIGS. The present invention is not limited to the above, and various changes and modifications can be made as exemplified by the second to fourth embodiments shown in FIGS. The bookshelf 1 and books 11 in the second to fourth embodiments shown in FIGS. 6 to 8 are the same as the bookshelf 1 and books 11 in the first embodiment described above except for the points described below. The configuration may be substantially the same. Therefore, in FIGS. 6-8, the same code | symbol is attached | subjected to FIG. 1-5 and a common part, and the description is abbreviate | omitted as needed. Further, in the following description, only the upper shelf board 7 will be described, but the remaining shelf boards 6 and 8 may have substantially the same configuration as that of the shelf board 7. Similarly to the case, shelves having different configurations may be mixed in the common bookcase 1 and used.

  First, the shelf board 7 in the second embodiment shown in FIG. 6 will be described. Only the pattern portion 28 on the front end side of the substantially loop-shaped antenna pattern 25 of the reader / writer antenna 21 of the shelf board 7 is substantially zigzag-shaped. (In other words, it is substantially serrated), which is different from the case of the first embodiment shown in FIGS. In the illustrated embodiment, specifically, in the case of the first embodiment shown in FIGS. 1 to 5, each of a large number of bent portions 35 formed in an approximately isosceles triangular mountain shape is tapered. It is composed of two bent portions 35 having substantially the same shape as the bent portion 35a on the right end which is formed in a mountain shape of a substantially right triangle. And these bending parts 35 and 35a are continuously arranged in succession. Accordingly, the bent portions 35 and 35a have a rising portion 37 in which the angle α formed with respect to the length direction of the shelf 7 is approximately 60 °, and an angle β formed with respect to the length direction of the shelf 7 in particular. Each of them is constituted by a falling portion 38 which is preferably approximately 90 °.

  Next, the shelf 7 in the third embodiment shown in FIG. 7 will be described. The pattern portion 26 on the rear end side of the antenna pattern 25 of the reader / writer antenna 21 of the shelf 7 and the front end side of the antenna pattern 25 are substantially the same. Only the pattern portion 28 is different from that of the first embodiment shown in FIGS. In the illustrated embodiment, specifically, a large number of bent portions 35 of the pattern portion 28 on the front end side are configured to be slightly smaller than in the case of the first embodiment shown in FIGS. As the number of the bent portions 35a increases, the bent portion 35a at the right end is configured to be substantially the same shape as the other bent portions 35. Further, the pattern portion 26 on the rear end side is substantially symmetrical with the pattern portion 28 on the front end side with respect to a center straight line 40 passing through the center of the shelf board 7 in the front-rear direction. Therefore, the pattern portion 26 on the rear end side has a large number of bent portions 35 and 35 a located on the front fore edge 16 side of the books 11, and the pattern portion 28 on the front end side is formed on the back cover 15 of the books 11. It has many bending parts 35 and 35a located in the side. The bent portions 35 and 35a have a rising portion 37 having an angle α of about 60 ° with respect to the length direction of the shelf 7 and an angle of about 120 ° with respect to the length direction of the shelf 7. Each falling part 38 is constituted.

  In the third embodiment shown in FIG. 7 configured as described above, the pattern portion 26 on the rear end side is substantially symmetrical with the pattern portion 28 on the front end side with respect to the central straight line 40 of the shelf board 7. ing. However, the pattern portion 26 on the rear end side may have a shape obtained by substantially translating the pattern portion 28 on the front end side from the front toward the rear. In this case, the distance of the parallel movement may be substantially the same as the distance between the center straight line 39 of the pattern portion 28 on the front end side and the center straight line 39 of the pattern portion 26 on the rear end side.

  According to the second embodiment shown in FIG. 6 and the third embodiment shown in FIG. 7 configured as described above, the bent portions 35 and 35a (in other words, the substantially loop-shaped portion 25) The number of pattern portions forming an angle of 60 °, 90 °, or 120 ° with respect to the length direction of the plate 7 is larger than that in the first embodiment shown in FIGS. Therefore, in the second and third embodiments, the reader / writer antenna 21 can perform wireless communication with the electronic tag 13 even better than in the case of the first embodiment.

  Next, the shelf board 7 in the fourth embodiment shown in FIG. 8 will be described. Only the pattern portion 28 on the front end side of the substantially loop-shaped antenna pattern 25 of the reader / writer antenna 21 of the shelf board 7 is shown in FIG. -This is different from the case of the first embodiment shown in FIG. In the illustrated embodiment, specifically, a large number of bent portions 35, 35a formed in a substantially triangular mountain shape in the case of the first embodiment shown in FIGS. It is formed in a shape (in other words, a convex shape). And these many bending parts 35 and 35a are successively connected by the continuous pattern part 41 extended in the length direction of the shelf board 7 sequentially. Accordingly, the bent portions 35 and 35a have a rising portion 37 having an angle α of approximately 90 ° with respect to the length direction of the shelf 7 and an angle β formed with respect to the length direction of the shelf 7. Each includes a falling portion 38 that is 90 °.

  According to the fourth embodiment shown in FIG. 8 configured as described above, the bent portions 35 and 35a (in other words, the substantially loop-shaped antenna pattern 25) are arranged in the length direction of the shelf board 7. It has a large number of pattern portions (in other words, the rising portion 37 and the falling portion 38) that form an angle of approximately 90 °. Therefore, in the fourth embodiment, the reader / writer antenna 21 communicates with the electronic tag 13 even though the substantially loop-shaped antenna pattern 25 of the reader / writer antenna 21 has a relatively simple shape. Can be performed relatively well.

  In FIG. 8, if a central straight line 39 passing through the center in the front-rear direction of the pattern portion 28 on the front end side is considered, the bent portions 35, 35 a have a substantially rectangular shape protruding from the central straight line 39 toward the rear end 31. A bent portion having a mountain shape (that is, the shape of the upper half of the original bent portions 35 and 35a) and a substantially rectangular mountain shape protruding from the center straight line 39 toward the front end 33 (that is, the continuous pattern portion 41) It can also be seen that each has a substantially rectangular mountain shape with the apex side, in other words, a substantially rectangular valley shape in FIG.

  In the fourth embodiment shown in FIG. 8, the pattern portion 26 on the rear end side extends substantially linearly along the length direction of the shelf board 7. For this reason, in the substantially loop-shaped antenna pattern 25, the first section in the length direction where the apex sides 42 of the bent portions 35 and 35a exist, and the length direction where the continuous pattern portion 41 exists. In the second section, there is no pattern portion that is inclined in the predetermined angle range. Therefore, the length of the first and second sections in the length direction (in other words, the length of the top side 42 and the continuous pattern portion 41) is determined by the reader / writer antenna 21 using the electronic tag 13. It is preferable to set the length relatively short so that wireless communication can be performed relatively well.

  Therefore, in the present invention, generally, as in the first and second sections (and the section of the continuous pattern portion 36 in FIGS. 4 and 6 in the length direction), an antenna pattern having a substantially loop shape is used. Preferably, each of the sections in 25 in which the pattern portion does not exist in the length direction (in other words, each length of the top side 42 and the continuous pattern portion 41) is 15 cm or less. It is more preferably 10 cm or less, and particularly preferably 5 cm or less.

(3) Communicable Distance Measurement Experiment FIG. 9A is a substantially loop-shaped antenna pattern of the reader / writer antenna 21 for the electronic tag 13 provided in the books 11 used in the first to fourth embodiments shown in FIG. The communicable distance (vertical axis) of 25 length direction pattern portions 26 is shown. 9B, from the center position of the electronic tag 13 (in other words, the center position of the small antenna 19 incorporated in the electronic tag 13 (see FIG. 5)) to the length direction pattern portion 26, as shown in FIG. 9B. The shortest distance x. In this case, six angles (that is, 0 °, 15 °, 30 °, 45 °, 60 °, and 75 °) are formed by the angle θ formed by the surface of the electronic tag 13 with respect to the length direction of the length direction pattern portion 26. In addition to changing the distance x, the communicable distance at each position was measured by changing the distance x between the electronic tag 13 and the length direction pattern portion 26 for these six angles θ. This measurement was performed not only on the inside (left half in FIG. 9A) of the antenna pattern 25 of the reader / writer antenna 21 but also on the outside (right half in FIG. 9A). The angle θ being 0 ° means that the length direction of the pattern portion 26 shown in FIG. 9B is parallel to the surface of the electronic tag 13.

  From the graph of the communicable distance shown in FIG. 9A, it can be seen that the communicable distance slightly decreases at θ = 45 °, and the communicable distance considerably decreases at θ = 60 °. In particular, at θ = 60 °, it can be seen that the communicable distance sharply decreases when the distance x exceeds about 30 mm. From this, the angles α, β (this angle α, β shown in FIG. 4 and FIGS. 6-8) formed by the length direction of the pattern portion 26 with respect to the length direction of the shelves 6-8 of the bookshelf 1 With respect to the angle θ formed by the pattern portion 26 with respect to the surface of the electronic tag 13, generally, the relationship of α (or β) = 90 ° −θ is substantially established. It can be seen that it is preferable that the relationship (or β) ≦ 140 ° is satisfied, and it is more preferable that the relationship 50 ° ≦ α (or β) ≦ 130 ° is satisfied.

  When the books 11 are arranged on the shelf boards 6 to 8, the books 11 are not necessarily arranged accurately so as to form 90 ° with respect to the length direction of the shelf boards 6 to 8. Therefore, it is not always preferable that the angle α or β is 90 ° or an angle in the vicinity thereof.

(4) Fifth Embodiment FIGS. 10 and 11 show a modification of the fourth embodiment shown in FIG. 12 and 13 show a fifth embodiment to which the present invention is applied. 14 and 15 show reference examples for explaining the present invention. In the following, prior to the description of the fifth embodiment shown in FIGS. 12 and 13, a modification of the fourth embodiment shown in FIGS. 10 and 11 and a reference example shown in FIGS. 14 and 15 will be described. A description will be made sequentially. The bookshelf 1 and books 11 in the modified examples of the fourth embodiment, the fifth embodiment, and the reference example are the bookshelf 1 in the first embodiment described above, except for the points described below. The configuration may be substantially the same as that of the books 11. Therefore, in FIGS. 10-15, the same code | symbol is attached | subjected to FIG. 1-5 and a common part, and the description is abbreviate | omitted as needed. However, in FIGS. 10 to 15, the reader / writer antenna 21 is shown in white for the sake of clarity. Further, in the following description, only the upper shelf board 7 will be described, but the remaining shelf boards 6 and 8 may have substantially the same configuration as that of the shelf board 7. Similarly to the case, shelves having different configurations may be mixed in the common bookcase 1 and used.

  In the fourth embodiment shown in FIG. 8, the performance of the reader / writer antenna 21 itself is improved by reducing the number of bent portions 35, 35a in the reader / writer antenna 21 provided on each of the shelf plates 6-8. At the same time, it is conceivable to reduce the manufacturing cost. A modification of the fourth embodiment in which the number of the bent portions 35 and 35a is reduced in this way is shown in FIGS. 10 and FIG. 11 is substantially different from the fourth embodiment shown in FIG. 8 in that the number of the bent portions 35 and 35a is reduced. 42 (and possibly the continuous pattern portion 41) is increasing in length. 10 and 11, the lengths of the top surfaces 42 and the connection pattern portions 41 are substantially the same.

  However, in the case of the shelf board 7 shown in FIG. 10, the communication area 43 with the electronic tag 13 (see FIGS. 3 and 5) exists in a considerably wide range as shown by the halftone in FIG. The communication impossible area 44 is also relatively large. As described in relation to the fourth embodiment shown in FIG. 8 in the section “(2) Second to fourth embodiments”, the communication disabled area 44 is formed at the top of the bent portions 35 and 35a. It mainly occurs in the central portion in the length direction between the first section in the length direction where the side 42 exists and the second section in the length direction where the connection pattern portion 41 exists.

  The shelf board 7 shown in FIG. 14 has a substantially loop-shaped antenna pattern 25 of the reader / writer antenna 21 elongated in the length direction of the shelf board 7 as described in the section “Problems to be Solved by the Invention”. It is configured as a rectangular simple loop. In the case of the shelf board 7 shown in FIG. 14, as shown by the halftone in FIG. 15, the communication disabled area 44 with the electronic tag 13 (see FIGS. 3 and 5) is very large. Then, there is only a certain amount of communicable area 43 near both the left and right sides of the book storage space of the bookshelf 1 as viewed from the take-out side (ie, the front side) of the books 11.

  Since it is as above-mentioned, in the case of the modification shown in FIG.10 and FIG.11, compared with the reference example shown in FIG.14 and FIG.15, with the electronic tag 13 of the books 11 arranged on the shelf 7, Although the communicable area 43 of the reader / writer antenna 21 exists in a wide range on the shelf board 7, there are a relatively large number of incommunicable areas 44. Therefore, the incommunicable area 44 is reduced as much as possible. Is preferred.

  The fifth embodiment shown in FIGS. 12 and 13 has been devised for the purpose of reducing such a communication impossible area 44. In the fifth embodiment, a total of two reader / writer antennas 21 as shown in FIG. Specifically, a front-side reader / writer antenna 21 a that may have substantially the same shape as the reader-writer antenna 21 shown in FIG. 10 is provided on the upper surface of the shelf board 7. Further, a reader / writer antenna 21b on the back side, which may have a shape similar to that of the reader / writer antenna 21 shown in FIG. In FIG. 12 and FIG. 13, the reader / writer antenna 21b on the back side is indicated by a dotted line. The pair of antennas 21a and 21b may be provided on either one of the front and back surfaces of the shelf board 7 by interposing an intermediate insulating film made of an appropriate insulating material between them. You may embed in the intermediate part in the thickness direction of the board 7. FIG. 12 and 13, reference numerals 39a and 39b are center lines passing through the centers in the front-rear direction of the reader / writer antennas 21a and 21b, respectively.

In FIG. 12, the back side reader / writer antenna 21b is substantially different from the front side reader / writer antenna 21a in plan view as described in the following items (i) to (iii). It is.
(I) The bent portions 35 and 35a of the antenna 21a are provided in the pattern portion 28 on the front end side, whereas the bent portions 35 and 35a of the antenna 21b are provided in the pattern portion 26 on the rear end side.
(Ii) The bent portions 35, 35a of the antenna 21b are shifted from the bent portions 35, 35a of the antenna 21a by approximately ½ pitch on the right side in the length direction of the shelf board 7, and (iii) The left pattern portion 27 of the antenna 21b is substantially ½ pitch on the left side in the length direction of the shelf 7 with respect to the left pattern portion 27 of the antenna 21a (this pitch means the interval between the bent portions 35 and 35a). ) It must be shifted one by one.

  Accordingly, in plan view, the left side pattern portion 27 of the antenna 21a, the right side pattern portion 27 of the antenna 21b, the rising portion 37 of the bent portion 35 of the antenna 21a, and the antenna 21b from the left side to the right side of the shelf plate 7 are seen. Rising portion 37 of the bent portion 35, falling portion 38 of the bent portion 35 of the antenna 21a, falling portion 38 of the bent portion 35 of the antenna 21b, rising portion 37 of the bent portion 35a of the antenna 21a, and bent portion 35a of the antenna 21b. Rising portion 37, falling portion 38 of bent portion 35a of antenna 21a, falling portion 38 of bent portion 35 of antenna 21b, and right pattern portion 29 of antennas 21a and 21b are sequentially shifted by approximately ½ pitch. It is arranged. In addition, the top surfaces 42 of the bent portions 35 and 35a of the antenna 21a are substantially orthogonal to the rising portions 37 of the bent portions 35 and 35a of the antenna 21b as viewed in a plan view. The top surfaces 42 of the bent portions 35 and 35a of the antenna 21b are substantially orthogonal to the falling portions 38 of the bent portions 35 and 35a of the antenna 21a as viewed in a plan view.

  Since it is as above-mentioned, in the shelf 7 shown in FIG. 12, the area in the length direction of the shelf 7 in which the pattern site | part inclined in the said predetermined angle range does not exist is the continuous pattern part 41 or the top side 42. The length is reduced to a length obtained by subtracting the length of about ½ of the length of the top side 42 or the continuous pattern portion 41. Therefore, in the shelf board 7 shown in FIG. 12, as shown by the halftone in FIG. 13, the communication impossible area 44 with the electronic tag 13 (see FIGS. 3 and 5) is very small, and the communication possible area 43 is provided. Because there are so many, there is no practical problem.

  Next, the positional relationship between the antennas 19 and 21 and the communicable area 43 will be described. In the communication technique using the electromagnetic induction method, a magnetic flux generated from the reader / writer antenna 21 is used as a small loop antenna of the electronic tag 13. By receiving at 19, the communication between the two becomes possible. Therefore, in the vicinity of the center of the reader / writer antenna 21, the positional relationship in which the small antenna 19 of the electronic tag 13 faces the reader / writer antenna 21 (in other words, the surfaces of the two antennas 19 and 21 are parallel to each other). The maximum communication distance can be obtained. On the contrary, in a state where the surfaces of the two antennas 19 and 21 are orthogonal to each other, communication is impossible. On the other hand, in the vicinity of the antenna line (in other words, the antenna pattern) 25 of the reader / writer antenna 21, a magnetic field is formed around the antenna line, so that the small antenna 19 of the electronic tag 13 is orthogonal to the magnetic field. The communication distance is maximized when the two antennas 19 and 21 are in a state in which the surfaces of the two antennas 19 and 21 are orthogonal to each other.

  Therefore, in the case of the reader / writer antenna 21 having the antenna pattern 25 configured in a simple loop shape on the surfaces of the shelf boards 6 to 8, the electronic tag 13 attached to the front cover or the back cover is the book 11 When placed upright on the shelf boards 6 to 8 in a normal state, as shown in FIG. 15, communication is possible only near the left and right sides of the shelf boards 6 to 8 as viewed from the loading / unloading surface side of the books 11. The central portion in the length direction of the shelf boards 6 to 8 becomes unable to communicate.

The positional relationship between the pair of reader / writer antennas 21a and 21b as shown in FIG. 12 may be determined as described in the following items (a) to (c).
(A) First, the electronic tag 13 is arranged in a predetermined positional relationship with respect to the first antenna 21a, and is a communicable region or a communicable region over the entire shelf board 7. Evaluate whether
(A) Next, the second antenna 21b is evaluated in the same manner as described in the item (A). (In this case, if the substantially looped antenna pattern 25 of the second antenna 21b is substantially the same as the substantially looped antenna pattern 25 of the first antenna 21a, the first antenna 21a is evaluated as (This can be used for evaluation of the second antenna 21b.)
(C) The mutual positional relationship between the two antennas 21a and 21b is selected so that the incommunicable region of the first antenna 21a is supplemented by the communicable region of the second antenna 21b, and the two antennas are overlapped with each other in parallel.

  In the fifth embodiment described above, two reader / writer antennas 21 (in other words, two sets) are provided on the shelf board 7, but a plurality of three or more antennas may be provided in a state of being insulated from each other. . When a plurality of reader / writer antennas 21 (including the fifth embodiment) are provided, when the plurality of antennas 21a and 21b are operated alternately or sequentially, a plurality of antennas are provided. Mutual interference between 21a and 21b can be prevented. Note that the measurement of the communicable area 43 and the incommunicable area 44 shown in FIG. 13 is also obtained by operating the pair of antennas 21a and 21b alternately. When a plurality of reader / writer antennas 21 are provided, the reader / writer main body 22 may be connected through a switch using a twisted pair cable, a coaxial cable, or the like, or a plurality of reader / writer antennas may be connected. A plurality of reader / writer bodies may be individually connected. Further, one of the two reader / writer antennas (for example, the antenna 21a) formed on each of the plurality of shelf boards 6 to 8 of the book shelf 1 is connected to the reader / writer main body 22 at the same time, and the other (for example, the antenna) It is also possible to connect the antenna 21b) to the same or different reader / writer main body at once. In this case, the reader / writer main body is connected to a personal computer by a cable and can be managed by this personal computer.

  In the fifth embodiment, the reader / writer antenna 21a is provided with the bent portions 35 and 35a in the pattern portion 28 on the front end side, and the reader / writer antenna 21b is provided with the pattern portion 26 on the rear end side. Bending portions 35 and 35a are provided. However, the bent portions 35 and 35a may be provided only on the front end side pattern portion 28 of the reader / writer antennas 21a and 21b, respectively, or the bent portions 35 and 35a may be provided only on the rear end side pattern portion 26, respectively. Furthermore, the antenna 21a and the antenna 21b are not necessarily required to have substantially the same pattern shape or a similar pattern shape in plan view.

  In the fifth embodiment described above, reader / writer antennas 21a and 21b are provided on the front and back sides of the shelf boards 6 to 8, respectively. However, the antennas 21a and 21b are respectively formed on two non-metallic substrates (for example, glass substrates) such as glass and synthetic resin constituting the shelf plates 6 to 8, respectively, and the two antennas 21a and 21b are formed. These two substrates may be bonded together by bonding or the like so that the two substrates are overlapped with each other through an intermediate insulating film made of an appropriate insulating material. The two antennas 21a and 21b are electrically insulated from each other by one of the two substrates by coupling the surfaces in the same direction, so that a shelf such as a glass shelf You may create 6-8.

  The first to fifth embodiments of the present invention have been described in detail above. However, the present invention is not limited to these embodiments, and is based on the spirit of the invention described in the claims. Various changes and modifications are possible.

  For example, in the first to fifth embodiments described above, the three shelf boards 6 to 8 are provided on the book shelf 1 in the upper and lower directions, but the shelf boards are not necessarily provided in the three upper and lower stages. Another stage having four or more stages may be provided above and below, and in some cases, only one stage may be provided.

  Further, in the first to third embodiments described above, a large number of bent portions 35, 35a are continuously and repeatedly formed in the length direction pattern portions 26 and / or 28, and the fourth described above. In the fifth embodiment, a large number of bent portions 35 and 35a are intermittently and repeatedly formed in the length direction pattern portion 28. However, a portion in which a large number of bent portions 35 and 35a are continuously and repeatedly formed, and a portion in which the plurality of bent portions 35 and 35a are formed repeatedly and sequentially are provided in the common longitudinal direction pattern portions 26 and / or 28 at the same time. Also good.

  In the first to fifth embodiments described above, a large number of bent portions 35, 35a are formed over substantially the entire length of the length direction pattern portions 26 and / or 28. However, one or a plurality of bent portions 35, 35 a are formed in a part or a plurality of portions of one length direction pattern portion 26, and the lengths of the shelf boards 6 to 8 in the other length direction pattern portion 28. One or a plurality of bent portions 35, 35a may be formed in the remaining portion or the remaining plurality of portions in the vertical direction. In this way, a large number of the bent portions 35, 35 a extend over substantially the entire length in the length direction of the shelf boards 6 to 8, and at least of the one length direction pattern portion 26 and the other length direction pattern portion 28. On the other hand (for example, alternately in the length direction pattern portion 28 and the length direction pattern portion 26), it may be formed by being sequentially or intermittently repeated.

  In the first to fifth embodiments described above, the substantially loop-shaped antenna pattern 25 of the reader / writer antenna 21 is wound once, but a plurality of spirally wound antenna patterns 25 are wound multiple times. It may be a wound one. In this case, it is preferable that the antenna pattern 25 does not have an intersecting portion where a part thereof intersects with another part.

  In the first to fifth embodiments described above, the apex angle portion of the substantially triangular mountain-shaped bent portions 35, 35a, the joint portion of the two bent portions 35, 35a, and the substantially rectangular mountain-shaped bent portion. Both corners of the apex side 42 of the portions 35 and 35a are sharpened. However, one or more or all of these portions may be rounded.

  In the first to fifth embodiments described above, the bent portions 35 and 35a are formed in a substantially triangular or substantially rectangular mountain shape. However, the bent portions 35 and 35a may have a substantially sinusoidal shape, a substantially elliptical shape, a substantially semicircular shape, or the like.

  Further, in the first to fifth embodiments described above, bent portions 35 and 35a having substantially the same shape or somewhat similar shapes are sequentially and intermittently formed in the length direction pattern portions 26 and 28 in succession. ing. However, for example, the bent portions 35 and 35a are arranged in the longitudinal direction pattern portion so that the substantially triangular mountain-shaped bent portion and the substantially rectangular mountain-shaped bent portion are mixed in the common longitudinal direction pattern portion 26 or 28. 26 and / or 28 may be formed continuously or intermittently repeatedly.

  In the first to fifth embodiments described above, the antenna pattern 21 constituting the reader / writer antenna is configured to have substantially the same width throughout. However, the antenna pattern 21 may have a partially wide pattern portion or a partially narrow pattern portion, and the same applies to the thickness of the antenna pattern 21.

  Further, in the first to fifth embodiments described above, the shelf boards 6 to 8 are formed in a substantially rectangular shape. However, the shelf boards 6 to 8 may have a non-linear shape that is bent, curved, or bent, such as a substantially arc shape, a substantially circular shape, a substantially U shape, or a substantially V shape. In this case, the book storage space on the shelves 6 to 8 and the length direction and frontage direction of the shelves 6 to 8 are also substantially arc-shaped, substantially circular, substantially U-shaped, substantially V-shaped, etc. It becomes a non-linear shape bent, curved or bent.

It is a perspective view of the bookshelf in the 1st example which applied the present invention to the books management system. Example 1 It is a perspective view of books shown in FIG. Example 1 It is a perspective view of the shelf board part of the upper stage among the bookshelves shown in FIG. Example 1 It is a top view of the shelf of the upper stage shown in FIG. Example 1 FIG. 3 is a detailed enlarged view of the electronic tag shown in FIG. 2. Example 1 It is a top view similar to FIG. 4 of the shelf board in the 2nd Example to which this invention is applied. (Example 2) It is a top view similar to FIG. 4 of the shelf board in the 3rd Example to which this invention is applied. Example 3 It is a top view similar to FIG. 4 of the shelf board in the 4th Example to which this invention is applied. Example 4 It is a graph which shows the communicable distance of the antenna for reader / writers with respect to the electronic tag provided in the books used in the 1st-4th Example shown in FIGS. (Examples 1-4) FIG. 9B is a perspective view schematically showing a positional relationship between books and electronic tags used in the first to fourth embodiments shown in FIGS. 1 to 8 for explaining the graph shown in FIG. 9A. (Examples 1-4) It is a top view similar to FIG. 4 of the shelf board in the modification of the 4th Example shown in FIG. (Modification of Example 4) FIG. 11 is a plan view of the shelf board shown in FIG. 10 in a state where an area incapable of communicating with the electronic tag is added. (Modification of Example 4) It is a top view similar to FIG. 4 of the shelf board in the 5th Example to which this invention is applied. (Example 5) It is a top view in the state similar to FIG. 11 of the shelf board shown in FIG. (Example 5) It is a top view similar to FIG. 4 of the shelf board in the reference example for demonstrating this invention. (Reference Example 1) It is a top view in the state similar to FIG. 11 of the shelf board shown in FIG. (Reference Example 1)

Explanation of symbols

1 Bookcase 6 Bottom plate (lower shelf)
7 Upper shelf board 8 Middle shelf board 11 Books 12 Front cover 13 Electronic tag 14 Back cover 21 Reader / writer antenna 21a Front reader / writer antenna 21b Rear reader / writer antenna 25 Loop-shaped antenna pattern 26 Rear End pattern part (length direction pattern part)
28 Front end pattern part (length direction pattern part)
35 Bending portion 37 at right end toward bending portion 35a Rising portion 38 Falling portion 43 Communication possible region 44 Communication impossible region

Claims (12)

In a system in which books are managed by performing wireless communication with an electronic tag provided on books placed on a shelf of a bookshelf with a reader antenna.
The electronic tag is provided on the front cover and / or back cover so as to be substantially parallel to the front cover and / or back cover of books,
A book management system, wherein the reader antenna includes a substantially loop-shaped antenna pattern provided on the shelf so as to be substantially parallel to the surface of the shelf. The antenna pattern is configured in a substantially loop shape substantially along the outer periphery of the shelf so as not to have an intersecting portion when seen in a plane.
Of the substantially loop-shaped antenna pattern, at least a part of at least one pattern portion extending substantially in the frontage direction of the shelf has a bent portion bent in the depth direction of the shelf. The management system according to claim 1, wherein:   The management system according to claim 2, wherein the bent portion has a pattern portion inclined at an angle range of 40 ° to 140 ° with respect to a frontage direction of the shelf board. A plurality of reader antennas are provided on a common shelf,
Each of the plurality of reader antennas has a substantially loop-shaped antenna pattern so as to compensate for the incommunicable areas on the shelf board in a plan view, and the bent portion is directed toward the front edge of the shelf board. The management system according to claim 2 or 3, wherein the management system is arranged in a state shifted from each other.   The management system according to claim 4, wherein the plurality of reader antennas operate sequentially.   5. The bent portions of the substantially loop-shaped antenna patterns of the plurality of reader antennas have portions that do not overlap each other in plan view. Or the management system of 5. In a shelf board that is used to arrange books stored in a bookcase and is provided with a reader antenna,
The substantially loop-shaped antenna pattern of the reader antenna is substantially along the outer periphery of the shelf so that it does not have an intersection when viewed in plan and is substantially parallel to the surface of the shelf. Consists of almost loop shape,
Of the substantially loop-shaped antenna pattern, at least a part of at least one pattern portion extending substantially in the frontage direction of the shelf has a bent portion bent in the depth direction of the shelf. A shelf board with an antenna for bookcases.   The shelf with an antenna according to claim 7, wherein the bent portion has a pattern portion that is inclined in an angle range of 40 ° to 140 ° with respect to a frontage direction of the shelf. A plurality of reader antennas are provided on a common shelf,
Each of the plurality of reader antennas has a substantially loop-shaped antenna pattern so as to compensate for the incommunicable areas on the shelf board in a plan view, and the bent portion is directed toward the front edge of the shelf board. The shelf board with an antenna according to claim 7 or 8, wherein the shelf board is arranged in a mutually shifted state.   The bent portion of each of the substantially loop-shaped antenna patterns of each of the plurality of reader antennas has a portion that does not overlap with each other when seen in a plan view. A shelf board with an antenna described in 1. Two reader antennas are provided on a common shelf,
Each of the substantially loop-shaped antenna patterns of each of the two reader antennas has a plurality of the bent portions that are substantially the same shape and are arranged at substantially equal intervals along the opening direction of the shelf.
Each of the plurality of bent portions has a bent pattern portion that is bent at an angle of approximately 90 ° with respect to the opening direction of the shelf,
In the opening direction of the shelf, the bent pattern portions of the plurality of bent portions of the first reader antenna are sequentially approximately in the middle of the bent pattern portions of the plurality of bent portions of the second reader antenna. The shelf board with an antenna according to claim 9 or 10, characterized by being arranged. A method of manufacturing a shelf board that is used to arrange books stored in a bookshelf and on which a plurality of reader antennas are provided in common,
In the shelf board, the substantially loop-shaped antenna pattern of each of the plurality of reader antennas is substantially parallel to the surface of the shelf board so as not to have an intersecting portion when seen in a plan view. , Is configured in a substantially loop shape substantially along the outer periphery of the shelf,
In the shelf board, at least a part of at least one pattern portion extending substantially in the frontage direction of the shelf board among the substantially loop-shaped antenna patterns is bent in the depth direction of the shelf board. Have a bend,
In the shelf board, the bent portions are arranged in a plan view so that the substantially loop-shaped antenna patterns of the plurality of reader antennas complement the incommunicable areas on the shelf board. In the method of manufacturing a shelf board with an antenna for bookcases, each arranged in a state shifted from each other in the frontage direction of the shelf board,
For the plurality of reader antennas, determine the communicable area and / or incommunicable area with the electronic tag over almost the entire area of the shelf board based on the respective measurements,
The plurality of reader antennas are arranged such that the communicable areas of some of the plurality of reader antennas supplement the remaining some incommunicable areas of the plurality of reader antennas. A method for manufacturing a shelf board with an antenna for a bookcase, characterized in that the shelf board is commonly arranged on the shelf board.

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