JP2015170157A - RFID tag writing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an RFID tag writing device that can perform writing in an RFID tag more surely without reduction in writing characteristics.SOLUTION: An RFID writing device performing writing in an RFID tag T arranged in a plurality of rows in a sheet P has: a conveyance unit 110 that conveys the sheet P; a plurality of writing units 30 that performs writing in the RFID tag T for each row; and a plurality of backup members 40 that is facedly arranged for each writing unit 30 to support the sheet P. The backup members 40 corresponding to adjacent writing units on the same row have mutually different relative permittivity.

Description

  The present invention relates to an RFID tag writing device for writing to RFID tags arranged in a plurality of rows.

  When writing data to RFID tags arranged in multiple rows, measures such as shifting the communication frequency, shifting the write timing, and strengthening the shield are taken to avoid interference between adjacent tags. ing. However, for example, when the frequency is shifted, there is a concern that the write characteristics are deteriorated because the resonance frequency of the tag deviates. As means for solving such a situation, a frequency adjusting circuit corresponding to a plurality of RFID tags having different frequencies is incorporated in a relay board, and the relay board is provided in advance between the antenna board of the reader / writer and the control board for each frequency. The structure which keeps is proposed (for example, refer patent document 1). However, this configuration increases the number of members, leading to an increase in the cost of the entire apparatus and the number of manufacturing steps.

JP2013-106989A

  The present invention adjusts the resonance frequency for each column to a plurality of RFID tags without increasing the number of members and performs writing at different frequencies in each column, thereby preventing mutual radio wave interference and improving efficiency. Provided is an RFID tag writing device with good quality.

(1) A first aspect according to the present invention is an RFID writing apparatus that writes to RFID tags arranged in a plurality of rows on a sheet, and performs writing on the RFID tag for each column and a conveyance unit that conveys the sheet. A plurality of writing units and a plurality of backup members arranged to face each writing unit and supporting paper, and backup members corresponding to the writing units adjacent to each other on the same row have different relative dielectric constants. An RFID tag writing device is provided.
(2) In the RFID tag writing device according to (1) above, the plurality of writing units may be arranged in a staggered manner.
(3) In the RFID tag writing device according to (2), the backup members formed of a material having a high relative dielectric constant are adjacent to the backup members formed of a material having a low relative dielectric constant. It may be provided.

  According to the present invention, it is possible to prevent mutual radio wave interference by adjusting the resonance frequency for each column to a plurality of columns of RFID tags without increasing the number of members and performing writing at different frequencies in each column. And an efficient RFID tag writing device can be provided.

1 is a front view of an RFID tag writing device according to an embodiment of the present invention. It is a fragmentary sectional view of a RFID tag writing device. It is a top view of the conveyance part of a RFID tag writing apparatus. It is a top view of the antenna assembly of the state fixed to the plate. It is a figure equivalent to the AA sectional view in Drawing 4.

  Hereinafter, an RFID (Radio Frequency Identification) tag writing apparatus 1 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The RFID tag writing device 1 performs writing on the RFID tags T arranged in a plurality of rows on the mount D. The row direction indicates a direction (paper width direction) orthogonal to the paper transport direction.

  In FIG. 1, the RFID tag writing apparatus 1 inspects a supply unit 11 that supplies paper P, a printing unit 12 that prints on the paper P conveyed from the supply unit 11, and a paper P printed by the printing unit 12. And an inspection unit 13. The supply unit 11, the printing unit 12, and the inspection unit 13 are sequentially arranged in the conveyance direction C of the paper P. Here, it is assumed that the sheets P of the RFID tags T are arranged in a plurality of rows on a mount D having a release agent by a label having an adhesive. Note that the paper P may be a paper P sandwiched between two papers in a state where the RFID tags T are arranged in a plurality of rows. In the drawing, the conveyance direction C is indicated by a solid arrow.

  The supply unit 11 supplies paper P, which is a continuous paper, to the printing unit 12. Here, the paper P may be a folded paper or a continuous paper wound in a roll shape.

  The printing unit 12 performs monochrome printing or color printing on the paper P. As the printing method, an inkjet method, a dry electrophotographic method, a thermal transfer method, or the like can be used.

  The inspection unit 13 inspects whether characters, images, and the like printed on the paper P are shifted from the paper P, whether the paper P is wrinkled, twisted, or the like. The inspection can be performed by photographing printed characters, images, and the like and performing image processing. The inspection method may be another method. When an abnormality is found in the inspection, the RFID tag writing device 1 is stopped, and maintenance and inspection work for the supply unit 11 and the printing unit 12 is performed.

  Below, it demonstrates in detail focusing on the supply part 11 which writes in the RFID tag T arrange | positioned in multiple rows on the mount D. FIG. As shown in FIGS. 2 and 3, the supply unit 11 of the RFID writing apparatus 1 includes an antenna plate 20 having a transport unit 110 that transports the mount D and a plurality of writing units 30 that write to the RFID tag T for each column. And a backup plate (backup member) 40 facing the antenna plate 20 with the mount D interposed therebetween. The backup plate 40 that supports the mount D is provided as a plurality of backup plates 41, 42, and 43 for each row of tags.

  FIG. 3 shows an example in which 10 rows of RFID tags T are temporarily attached to the surface of release paper that is a continuous mount D, but the present invention is not limited to this, and the RFID tags T and corresponding backup plates are not limited thereto. 40 may be in any number of rows.

  Both ends of the mount D are positioned and transported by guide members G having feed pins (not shown) arranged on both sides with respect to the transport direction C of the entrance and exit of the paper P entering the supply unit 11. The width of the mount D, the number of RFID tags T, the arrangement, and the like differ depending on the use of the RFID tag T. The mount D is conveyed while sliding in contact with the backup plate 40. In addition, you may convey in an approach state, without making it slide on a backup plate.

  The antenna plate 20 is disposed on the conveyance direction C side of the guide member G. Here, the antenna plate 20 has a long rectangular shape in a direction orthogonal to the conveyance direction C in plan view.

  In FIG. 4, the antenna plate 20 includes a plate 21 and a writing unit 30. The antenna plate 20 includes ten write units 30 so as to have a one-to-one correspondence with the RFID tags T arranged in the ten rows shown in FIG. The writing unit 30 writes predetermined writing information to the corresponding RFID tag T by non-contact communication. Here, an example is shown in which the writing units 30 are arranged in two rows in a staggered pattern on the plate 21. In the following description, the writing units 30 arranged in the front row in the transport direction C are described. However, the same applies to the writing units 30 arranged in the back row in the transport direction C. Further, in the present specification, the writing units 30 next to each other in the same row are referred to as adjacent writing units 30, and the backup plates 40 corresponding to the adjacent writing units 30 are referred to as every other backup plate 40. .

  In the following, in order to explain the writing unit 30 and the backup plate 40 in more detail, the case where three adjacent writing units 30 and three other backup plates 40 facing each writing unit 30 are taken out, This will be described with reference to FIG.

  In FIG. 5, a first writing unit 31, a second writing unit 32, and a third writing unit 33 that write to the RFID tag T for each column, a first writing unit 31, a second writing unit 32 across the mount D, The first backup plate 41, the second backup plate 42, and the third backup plate 43 that are arranged to face each other for the third writing unit 33 and support the mount D are shown. The first writing unit 31, the second writing unit 32, and the third writing unit 33 each have an antenna ANT1, an antenna ANT2, and an antenna ANT3. In accordance with a signal from the reader / writer 300, the first writing unit 31, the second writing unit 32, and the third writing unit 33 respectively write a predetermined write to the corresponding RFID tag T via the antenna ANT1, the antenna ANT2, and the antenna ANT3. Write garbage information.

  The antenna ANT1, the antenna ANT2, and the antenna ANT3 are obtained, for example, by patterning a conductive material on an insulating substrate. The pattern can be formed by etching or printing.

  Every other first backup plate 41 and second backup plate 42, every other second backup plate 42 and third backup plate 43 have different relative dielectric constants ε1, ε2, and ε3.

  If the write frequency from the antenna to the RFID tag T is changed in order to reduce the influence from the other columns, the write characteristic is deteriorated because it is shifted from the resonance frequency of the RFID tag T. On the other hand, according to the embodiment, the respective dielectric constants ε1, ε2, and ε3 of the first backup plate 41, the second backup plate 42, and the third backup plate 43 are influenced by the antennas of the corresponding RFID tags T. The resonance frequencies f1, f2, and f3 are different. The rate of change in wavelength due to the difference in relative permittivity ε is expressed by the reciprocal of the square root of relative permittivity ε (1 / √ε), but the antennas provided in each column depend on the frequency according to the change in these resonance frequencies. By applying radio waves from the ANT1, the antenna ANT2, and the antenna ANT3 to the antenna of the RFID tag T, it is possible to suppress the influence of other columns.

  Here, the first writing unit 31 and the RFID tag T located outside in the transport direction C of the mount D are sandwiched between the first writing unit 31 and the RFID tag T, the third writing unit 33 and the RFID tag T on both sides. Further, the influence from other columns is less than that of the second writing unit 32 and the RFID tag T. Therefore, the first backup plate 41 located outside in the transport direction C of the mount D may have a higher relative dielectric constant ε than the second backup plate 42 located inside.

  For example, the first backup plate 41 is made of a rubber material (silicon rubber, ethylene propylene diene rubber (EPDM)), glass epoxy substrate material (FR4), glass or the like having a high relative dielectric constant, and the second backup plate 42 is made of a relative dielectric. For the third backup plate 43, a low-expansion foamed resin, styrene, Teflon (registered trademark), polyethylene terephthalate (PET), or the like can be used. As a result, every other backup plate 40 has a relative dielectric constant different from each other.

  In the above embodiment, the example in which the writing units 30 are arranged in a staggered manner has been described. However, the present invention can also be applied to a case where the writing units 30 are arranged in a horizontal row instead of the staggered manner. In that case, since the backup plates 40 corresponding to the adjacent writing units 30 are also adjacent to each other, the adjacent backup plates 40 have different dielectric constants.

  According to the embodiment, it is possible to provide the RFID tag writing device 1 that can perform writing to the RFID tag T more reliably without deterioration in writing characteristics.

  In the embodiment, writing to the RFID tag T has been described, but the present invention can also be applied to reading. In the embodiment, the RFID tag writing apparatus 1 that can perform printing has been described. However, the present invention can also be applied to an RFID tag writing apparatus that does not perform printing.

DESCRIPTION OF SYMBOLS 1 RFID tag writing device 11 Supply part 12 Printing part 13 Inspection part 20 Antenna plate 21 Plate 30 Writing part 31 First writing part 32 Second writing part 33 Third writing part 40 Backup plate (backup member)
41 First backup plate 42 Second backup plate 43 Third backup plate 110 Conveying unit 300 Reader / writer ANT1, ANT2, ANT3 Antenna C Conveying direction D Mount f1, f2, f3 Resonance frequency G Guide member P Paper

Claims (3)

An RFID writing device for writing to RFID tags arranged in a plurality of rows on paper,
A transport unit for transporting the paper;
A plurality of writing units for writing to the RFID tag for each column;
A plurality of backup members that are arranged to face each other and support the paper;
The RFID tag writing device, wherein the backup members corresponding to the writing units adjacent to each other on the same row have different dielectric constants.   The RFID tag writing apparatus according to claim 1, wherein the plurality of writing units are arranged in a staggered manner.   3. The plurality of backup members, wherein a backup member formed of a material having a high relative dielectric constant and a backup member formed of a material having a low relative dielectric constant are provided adjacent to each other. The RFID tag writing device according to 1.

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