JP5472779B2 - Reel management system - Google Patents

Description

  The present invention relates to a reel member management system, and more particularly, to a reel management system that efficiently manages reel members by using an IC tag.

  There are various types and types of RFID (Radio Frequency Identification) systems using IC cards or IC tags. For example, in a type capable of communication without a battery, a transportation card system, a distribution management system, an article management system, etc. It has been put into practical use and has become popular. In particular, IC tags that can have a larger amount of information in place of barcodes are expected in various fields for article management.

  As a main configuration of the system, there is an IC tag having an antenna on an IC chip, and a reader / writer device for communicating with the IC tag. The reader / writer device is equipped with an antenna, and the power for driving the IC chip in the IC tag and the question data are transmitted constantly or intermittently by the antenna, and the IC is within a range where the power and the question data can be received. Get response data from the tag.

Here, an electromagnetic induction 13.56 MHz RFID system will be described.
In the 13.56 MHz RFID system, the circuit drive power in the IC tag supplied from the reader / writer is a magnetic field / magnetic flux, and both antennas are often loop antennas. In order to establish communication, the magnetic field / magnetic flux generated by the antenna on the reader / writer side penetrates the loop opening of the loop antenna on the IC tag side, and the magnetic field sufficient for the IC chip of the IC tag to obtain driving power. It must meet conditions such as strength.

Next, the reel member will be described.
The reel member described here is packaged and wound in a tape shape so that the reel member can be mechanically mounted on a printed circuit board built in an electric device or the like.
FIG. 9 shows an example of the reel member. In the reel member of this example, a plurality of chip components 203 are provided on a tape 202 wound around a reel 201.

  The machines (mounters) to be mounted vary depending on the specifications of each manufacturer and the size of the reel, but the mechanism for sequentially taking out and mounting the components packaged on the tape while the reel rotates is common. That is, as the reel mechanism, there are a hole in the rotating shaft and a reel assembling part around the hole. In addition, when the reel size is Φ180 mm, the size of the assembly processing part is generally Φ60 mm.

FIG. 10 shows an example of the mechanism of the reel 201.
The reel assembly processing unit 211 is a joining portion of two disks, and there is no chip part.
Further, there are a portion 212 around which a chip part and a tape are wound, and a hole 213 through which the reel rotation shaft passes.

When such a large number of reel members are used for management, in general, they are arranged in a spatially efficient manner in a state where they are arranged on a steel multistage shelf.
FIG. 11 shows an example of storing the reel member in the multistage shelf 221. A plurality of reels 222 are stored in the shelves of each stage of the multistage shelf 221.

However, since both sides of the reel are hidden, information (for example, part name, date of manufacture, etc.) printed on each reel directly or on a label (seal) is visually observed or means using a barcode. Can not get in. For this reason, the management of the components stored in the shelf itself is very troublesome and requires time.
Therefore, it is considered to construct and operate a system for managing reel members by attaching an IC tag to a reel and reading information on the IC tag with an antenna for a reader / writer installed on a storage shelf.

JP 2004-146553 A

Here, in order to explain the problem, a less preferred example is given.
A method of reading a card-size IC tag attached to a reel surface of a reel member placed on a shelf board by a reader / writer side antenna (shelf-type antenna) along or on the shelf board surface think about.
In this case, there are some serious obstacles in securing the reading performance.

First, the surface to be attached to the IC tag is one of both sides of the reel for handling and the like, and there is no choice but to attach it to the part where the tape of the component is wound from the size of the IC tag. For this reason, it is difficult to read the IC tag due to the shielding by the metal that is the material of the component.
FIG. 12 shows an example of a card size IC tag 232 attached to the reel 231. The reel 231 has a diameter of 180 mm and the IC tag has a size of about 55 × 90 mm.

If the reading range of the shelf antenna is near the shelf surface, when the reel member is stored in the shelf, the angle of the rotation direction of the reel member so that the IC tag is on the shelf antenna side (lower side) If the direction is not adjusted, it is impossible to read the information of the IC tag.
FIG. 13 shows an example of a positional relationship of reading by a card size IC tag and a shelf antenna.
Specifically, the tag reading range 242 and the antenna reading direction 243 of the shelf antenna 241 are shown. The IC tag 252 of the reel 251 can be read because it exists in the tag reading range 242, but the IC tag 254 of the reel 253 cannot be read because it is out of the tag reading range 242.

  As another configuration example, it is conceivable that the reading range of the shelf type antenna has a performance capable of covering all the reel sizes so that the position of the IC tag may not be on the lower side. It is extremely difficult to change depending on the reel size and to increase the reading range in the height direction by increasing the antenna output, and is preferable from the viewpoint of reading performance and power saving of the reader / writer of another shelf Absent.

  The present invention has been made in view of such conventional circumstances. For example, an IC tag is affixed to each reel member, stored in a general steel shelf, and installed on the shelf. An object of the present invention is to provide an RFID reel member management system that can realize the management of the reel member accurately and with little effort by reading the information of the IC tag with the antenna of the reader / writer.

In order to achieve the above object, in the present invention, a reel to which an IC tag is attached is stored in a storage shelf, and wireless communication using an electromagnetic induction action is used between the IC tag attached to the reel stored in the storage shelf. A reel management system having a reader / writer device for writing or reading data without contact by communication has the following configuration.
That is, the IC tag is attached to a specific range around the rotation shaft hole of the reel. In addition, the IC tag has a sufficiently small size. The reader / writer device includes a loop antenna for performing non-contact communication with the IC tag, and the loop antenna is disposed on a storage shelf that stores the reel. The loop antenna arranged on the storage shelf is arranged so that data can be written or read out in a non-contact manner with an IC tag attached to a specific range around the rotation shaft hole of the reel. Yes.
The specific range is a range of radii r ₁ to r ₂ from the center of the reel, r ₁ is a distance between the outer periphery and the center of the rotation shaft hole of the reel, and r ₂ is a distance between the outer periphery and the center of the reel. Smaller than. r ₂ is preferably the distance between the outer periphery and the center of the reel assembly site.

  Therefore, for example, an IC tag is affixed to each reel member, stored in a storage shelf (for example, a general steel shelf), and information on the IC tag is provided by a reader / writer antenna installed on the shelf. By reading the above, it is possible to provide an RFID reel member management system that can realize the reel member management accurately and with little effort.

  As described above, according to the reel management system of the present invention, the reel member can be efficiently managed using the IC tag.

Embodiments according to the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration example of a reel management system according to an embodiment of the present invention.
The reel management system of this example includes a reel 1 to which an IC tag 2 is attached, a control computer (control PC) 11, a LAN (Local Area Network) 12, a reader / writer (reader / writer device) 13, and an upper antenna. A switcher 14, a plurality of n lower antenna switchers 14-1 to 14-n, n-stage shelf plates 15-1 to 15-n constituting a storage shelf for the reel 1, and A plurality of antennas (loop antennas in this example) # 1_1 to # n_8 provided on the shelf boards 15-1 to 15-n are provided. In this example, eight shelves 15-i (i = 1 to n) are provided with eight antennas # i_1 to # i_8.
The antennas (# 1_1 to # n_8) are stand-type antennas provided on an antenna chassis that is erected in a direction perpendicular to the shelf plate, and the antenna opening surface (loop surface) is perpendicular to the shelf plate. ing.

Here, the control PC 11 connected to the upper network is connected to the LAN 12 and is connected to the reader / writer 13 connected to the LAN 13.
The reader / writer 13 is connected to the upper antenna switch 14, and the upper antenna switch 14 is connected to each of the lower antenna switches 14-1 to 14-n.
Each antenna switch 14-1 to 14-n switches the antenna to be used about the some antenna provided in each shelf board 15-1 to 15-n.

  In this example, the control PC 11, one reader / writer 13, hierarchically connected antenna switcher (in this example, one upper 14 and n lower 14-1 to 14 -n two-layer configuration), 1 An n-stage shelf plate 15-1 to 15-n having eight antennas per shelf forms a tree structure from the upper level to the lower level. For example, it is possible to send various control signals from the upper level to the lower level and send predetermined data. Signals related to various controls from the lower level to the upper level (for example, for reporting) And the like, or predetermined data can be sent.

Each antenna is a concentric loop antenna that is slightly larger than the reel assembly part size Φ60 mm, and has a size Φ that is completely or hardly affected even when the shelf board is made of metal. And the center of the loop antenna are placed at the same position. In addition, by forming the chassis of each antenna in a plate shape, it also functions as a partition plate for the reels arranged in parallel.
The plurality of antennas installed on the same shelf board are provided so as to have antenna sensitivity and distance intervals that can avoid reading the same tag as much as possible and avoid interference between antennas as much as possible. ing.

In this example, the IC tag is a small circular tag having a diameter of Φ20 mm, and is affixed along the inner circumference of the reel assembly processing portion (Φ60 mm).
FIG. 2 shows an example of the relationship between the position where the small circular tag 2 (Φ20 mm) is attached to the reel 1 (Φ180 mm). In this example, a donut-shaped section drawn at r10 to 30 mm on the reel 1, that is, a section between the outer diameter of the hole through which the reel rotation shaft passes and the outer diameter of the assembly processing portion is set as a tag pasting area 21, and IC Tag 2 is attached. An attached state is shown as an IC tag 2a.

In order to improve the accuracy and workability of the IC tag application position, the IC tag is processed as an adhesive sheet (label), and sufficient adhesiveness is obtained even on the unevenness of the application surface. Make sure that there is no obstacle to operation.
FIG. 3 shows an example of forming a small circular tag with an adhesive sheet.
At a part of the adhesive sheet 31 having the same shape as the tag affixing area having a donut-shaped hole (rotary shaft hole) in the center of the reel, and further having a square-shaped protruding shape vertically and horizontally IC tag 32 is provided. By sticking this adhesive sheet 31 on the tag sticking area of the reel, the IC tag 32 can be stuck on the reel.

  In addition, when an IC tag is attached to a reel member, the IC tag is provided with the product name, model name, quantity, etc. of the reel member as data, or linked to the data stored in the database (DB) of the host network. By attaching, management of information on individual reel members becomes easy. Further, when the IC tag sheet is processed, the IC tag can be attached in any direction (rotation direction) without regard to the reading of the IC tag by the antenna as the position of the IC tag with respect to the rotation direction at the time of attachment. .

FIG. 4 shows an example of an image in which a reel member to which an IC tag is attached is stored in a shelf and read by an antenna.
Specifically, a plurality of reel members 41 to which IC tags 42 are attached are arranged on the shelf board 51, a plurality of antennas 52 on the shelf board 51, and a reading range 53 of each antenna 52 are shown. .
FIG. 5 shows an example of a reel member in which the IC tag 42 is attached to the reel 41 and a reading range 53 of the antenna 52.
The reading range (reading distance) 53 of the antenna 52 has a distance of about Φ (= the size Φ of the loop antenna) on both sides from the center of the loop.

Each direction of rotation at the time of reel storage reduces the shape and size of the IC tag, so that not only the probability that the IC tags of adjacent reels overlap but also the area when partially overlapping can be suppressed. In addition, the degree of inter-antenna interference between IC tags can be suppressed, and thereby the deterioration in reading performance can be suppressed.
FIG. 6 shows an example of how the IC tags overlap when the reels are stored.
As shown in the figure, the degree of overlapping of the plurality of IC tags 61 to 64 can be kept low.

  Thus, when returning to the shelf where the reels are stored, the probability that the positions of the IC tags overlap when the reels are stored can be suppressed without specifying the angle with respect to the rotation direction of the reels. In addition, when one or two reels are allocated to one antenna, IC tags can be prevented from overlapping. As a specific example, in the case of book management, conventionally, it is necessary to operate the tag so that the tag is attached to the lower side of the book and the tag can be read by the antenna loaded on the shelf. Operation that allows reading without worrying about the position of the tag during storage (reading) according to the rotation angle is possible.

This will be described in more detail.
As a premise, it is assumed that the size Φ of reels placed on one shelf (reel management antenna) is unified, and reels having different Φ are not mixed. For example, consider a case where IC tags overlap between adjacent reels. Note that when the IC tag becomes large, the IC tag of the two adjacent reels may be affected, but here it is omitted for the sake of simplicity.
For example, when the size of the IC tag is Φ20 mm, and the IC tag is attached to the center of the IC tag at a distance of 20 mm from the center of the reel, the circumference of r = 20 mm from the center of the reel is about 120 mm. The probability that the positions of the IC tags match between adjacent reels is less than 1/6.
When the reels are stored in the shelf, it is not necessary to specify the direction of the reels relative to the rotation direction, so that the operator can simply read the tag back to the shelf and read the tag.

On the other hand, in the type of antenna that is loaded on the shelf, the IC tag is attached to the edge of the reel. This is because it is difficult to read the tag unless it is the edge of the reel due to the influence of the parts (metal) wound on the reel. Furthermore, since a steel shelf is assumed, It is also disadvantageous that the reading range in the height direction with respect to the shelf of the reader / writer becomes smaller than when it is installed on the shelf. In this case, when the IC tag is stored in the shelf, the operator needs to be careful so that the IC tag is on the lower side so that the tag can be read, and it can be said that the position of the IC tag almost certainly matches. .
If these are compared, it can be said that the probability of an IC tag overlapping can be suppressed considerably in this example.

Even if the reel size changes, the system can be constructed using the same antenna by changing the installation position (height) of the antenna.
As a premise, it is assumed that the size Φ of reels placed on one shelf (reel management antenna) is unified, and reels having different Φ are not mixed.
Specifically, since the IC tag is affixed near the center of the reel, when the size of the reel becomes large (however, all reels of the same size), the antenna tag reading range is a little higher. By installing it, it is possible to obtain the same reading performance. For example, in a shelf storing a reel of Φ160 mm, the height of the antenna position (center position of the antenna) is 80 mm and the depth is 80 mm, and in a shelf storing a reel of Φ330 mm, the height of the antenna position By changing the installation height and depth according to the size of the reel using the same antenna, it is possible to read the information on the tag attached to the reel, such as 165 mm for the depth and 165 mm for the depth. Become.

  In addition, as the reading operation by the antenna, for example, the system has a position search function for each section on the shelf by reading the information of the IC tag within the reading range while sequentially switching each antenna. be able to.

Further, the configuration can be changed by combining a plurality of antennas into one unit by a coupler at the expense of the position search range (resolution).
FIG. 7 shows a configuration example in which two antennas are combined.
Specifically, an input signal (carrier wave) from the reader / writer is distributed by the distribution coupler 71, each distribution signal is tuned by each tuner 72, 73, and each loop antenna 74, A magnetic field (magnetic flux) is generated from 75. Due to the combined magnetic field of the two antennas, the space between the two antennas becomes a strong magnetic field, and a sufficient reading area can be secured.
Here, as the distribution, a mode in which the level is equally divided and two in-phase and opposite-phase waves are simultaneously output as the phase is used.
The connection and the principle are the same as those of the gate antenna, for example. As the distribution coupler 71, for example, a hybrid distributor used in a conventional gate antenna can be used.

In this way, in the connection form in which a plurality of antennas are combined into one unit by a coupler, a place where a plurality of cables are connected and wired can be formed by a single wiring, so that installation can be improved.
A configuration example of antenna synthesis will be described with reference to FIGS.
FIG. 8A shows a case where antenna combining is not performed.
Specifically, the reel 81 to which the IC tag 82 is attached, the reader / writer 91, the lower antenna switch 92 (here, the upper antenna switch is omitted), the shelf plate 93, a plurality of The reading range 95 of the antenna 94 and one antenna is shown. In this example, for the eight antennas (1) to (8), the antennas that generate magnetic fields (antennas used for communication) are switched in order from (1) to (8) under the control of the antenna switch 92. After (8), the process returns to (1) and the antenna is switched in a loop.

FIG. 8B shows a case where antenna combining is performed by setting two adjacent antennas as a set.
Specifically, the reel 101 to which the IC tag 102 is attached, the reader / writer 111, the lower antenna switch 112 (here, the upper antenna switch is omitted), four couplers ( For example, the distribution couplers 113 to 116, the shelf plate 117, the plurality of antennas 118, and the reading range 119 of two sets of antennas are shown. In this example, four sets of antennas each having two antennas ((1) to (4)) can be obtained as equivalent to the four couplers 113 to 116, and these four can be controlled by the antenna switch 112. For each of the pieces (1) to (4), switch the antenna set (the set of antennas used for communication and couplers 113 to 116 used for communication) that generates a magnetic field in the order of (1) to (4). After (4), the process returns to (1) to switch the antenna in a loop.

FIG. 8 (c) shows a case where antennas are combined by combining four adjacent antennas.
Specifically, the reel 121 to which the IC tag 122 is attached, the reader / writer 131, the lower antenna switch 132 (here, the upper antenna switch is omitted), two couplers ( For example, distribution couplers 133 and 134, shelf plate 135, a plurality of antennas 136, and a reading set 137 of four sets of antennas are shown. In this example, two sets of antennas each having four antennas ((1) to (2)) can be obtained as equivalent to the two couplers 133 and 134, and these two are controlled by the antenna switch 132. For the pieces (1) to (2), a set of antennas that generate magnetic fields in the order of (1) to (2) (a set of antennas used for communication, couplers 133 and 134 used for communication) is switched, After (2), the process returns to (1) and the antenna is switched in a loop.

As described above, in this example, the location where the IC tag is pasted on the reel member is limited to a specific portion, and by pasting using an IC tag with an adhesive sheet that matches the shape of the specific portion, The IC tag can be read regardless of the number and presence of the parts wound on the reel and without depending on the diameter of the reel.
Further, it is possible to detect and identify the reel member in units of loading places by using a small antenna in which the reel members loaded with mechanical mounting are installed for each loading place.

In addition, as described above, with a specific space and directionality, the location of the IC tag is limited when the reel member is stored, and the reader has a shape and size that is not affected by the number or presence of the parts wound on the reel. With a writer (R / W) antenna, a plurality of IC tags attached to the displayed reel member can be read at once.
In addition, it can be installed and operated regardless of the material of the storage shelf, and for example, sufficient reading performance can be exhibited even in an existing steel multistage shelf.

  Thus, when managing reel members used for machine mounting, each reel member can be managed by a management shelf provided with an antenna of a reader / writer that uses an RFID tag by attaching an IC tag to the reel member. it can. For example, it is possible to easily install and operate a general steel shelf.

Therefore, in this example, since it can be installed and operated on an existing shelf regardless of the material such as a general steel shelf, it is possible to introduce an RFID reel member management system with a reduced introduction cost. it can.
As a result, it is possible to accurately and easily perform management such as confirmation of inventory status of reel members and prevention of inventory shortage by remote control from a PC terminal (control PC 11 in this example) of the host network. In addition to being able to easily acquire and process data that analyzes the usage frequency of reel members, etc., it can also be applied to the preparation of reel members necessary for mounting, etc. to build a comprehensive production management system be able to.

In addition, as expandability, for example, when it becomes possible to read the IC tag of the reel member according to this example with respect to the reel member loading position on the mounter, the count information of the number of parts used in the mounter is reflected, The remaining number of parts inventory can be grasped more accurately.
FIG. 14 shows a comparative example regarding the IC tag reading antenna, the IC tag, and the operation of the stand type antenna according to the present example and the shelf type antenna according to the comparative example.

Hereinafter, (Configuration Example 1) to (Configuration Example 5) are shown as configuration examples according to this example.
(Configuration Example 1) A component reel to which an IC tag is attached is stored in a storage shelf that stores the component reel, and wireless communication using an electromagnetic induction action is performed between the component tag and the IC tag of the component reel stored in the storage shelf. A component reel management system including a reader / writer device for writing or reading data without contact,
The IC tag is attached to a specific area around the rotating shaft hole of the component reel,
The reader / writer device includes a loop antenna for performing contactless communication with the IC tag, and the antenna is disposed on a storage shelf that stores the component reels,
The antenna arranged on the storage shelf can write or read data without contact with an IC tag attached to a specific range around the rotation shaft hole of the component reel (for example, a component on the storage shelf). A component reel management system, wherein the component reel management system is arranged in a state in which contactless communication with the IC tag of the component reel is possible with the reel stored.

(Configuration Example 2) In the above (Configuration Example 1), the specific range around the rotation axis hole of the component reel is within 30 mm from the center of the rotation axis of the component reel. A component reel management system in which the range is set to cover a range within 30 mm from the center of the rotation axis hole of the component reel.
(Configuration Example 3) A component reel management system according to (Claim 1) or (Claim 2) described above, wherein the shelf board on which the component reel is mounted is made of metal.
(Configuration Example 4) In any one of the above (Configuration Example 1) to (Configuration Example 3), the IC tag is formed as an IC tag with an adhesive sheet, and the adhesive sheet has the shape of the rotation shaft hole of the component reel. Parts reel management system with central hole along.
(Configuration Example 5) In any of the above (Configuration Example 1) to (Configuration Example 4), when storing a plurality of component reels having different diameters, only one component reel having the same diameter is stored in one storage shelf. Parts reel management system.

Here, the configuration of the system and apparatus according to the present invention is not necessarily limited to the configuration described above, and various configurations may be used. The present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various systems and devices.
The application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
In addition, as various processes performed in the system and apparatus according to the present invention, for example, the processor executes a control program stored in a ROM (Read Only Memory) in hardware resources including a processor and a memory. A controlled configuration may be used, and for example, each functional unit for executing the processing may be configured as an independent hardware circuit.
The present invention can also be understood as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, and the program (itself). The processing according to the present invention can be performed by inputting the program from the recording medium to the computer and causing the processor to execute the program.

It is a figure which shows the structural example of the reel management system which concerns on one Example of this invention. It is a figure which shows an example of the relationship of the sticking position of the small circular tag with respect to a reel. It is a figure which shows the example of shaping | molding of the small circular tag with an adhesive sheet. It is a figure which shows an example of the image which accommodates the reel member in which the IC tag was stuck in the shelf, and reads with an antenna. It is a figure which shows an example of the reading range of a reel member and an antenna. It is a figure which shows an example of the mode of an IC tag overlap at the time of reel accommodation. It is a figure which shows the structural example which synthesize | combines two antennas. (A), (b), (c) is a figure which shows the structural example of antenna composition. It is a figure which shows an example of a reel member. It is a figure which shows an example of the mechanism of a reel. It is a figure which shows an example of the accommodation to the multistage shelf of a reel member. It is a figure which shows an example of sticking to the reel of a card size IC tag. It is a figure which shows an example of the positional relationship of the reading by a card size IC tag and a shelf type antenna. It is a figure which shows an example of the comparison regarding an antenna.

Explanation of symbols

  1, 41, 81, 101, 121, 201, 222, 231, 251, 253 ·· Reel, 2, 32, 42, 61-64, 82, 102, 122, 232, 252, 254 ·· IC tag, 11 ..Control PC, 12..LAN, 13, 91, 111, 131..Reader / writer, 14, 14-1 to 14-n, 92, 112, 132..Antenna switch, 15-1 to 15-n , 51, 93, 117, 135 .. Shelf board, 21 .. Tag attachment area, 31 .. Adhesive sheet, 52, 74, 75, 94, 118, 136, 241 .. Antenna, 53, 95, 119, 137 242 .. Reading range of antenna 71, 113 to 116, 133, 134 .. Coupler 72, 73 .. Tuner 202.. Tape, 203. 1 .. reel assembly processing unit, 212 ... chip component / portion the tape is wound, a hole through which 213 ... reel rotation axis, 221 ... multistage shelf, 243 ... antenna of the reading direction,

Claims (4)

A reel to which an IC tag is attached is stored in a storage shelf, and data can be written in a contactless manner by wireless communication using an electromagnetic induction action with the IC tag attached to the reel stored in the storage shelf. A reel management system having a reader / writer device for reading,
The IC tag is attached to a section between the outer diameter of the hole through which the reel rotation shaft passes and the outer diameter of the assembly part of the reel, which is a specific range around the rotation shaft hole at the center of the reel,
The reader / writer device includes a loop antenna for performing contactless communication with the IC tag, and the loop antenna is disposed on the storage shelf that stores the reel, and the layout is the loop antenna. when viewed from the direction of magnetic flux passing through the center of a layout in which the center and the center of the loop antenna of the reel housed in the storage rack is apparently the same position,
The loop antenna arranged on the storage shelf performs writing or reading of data without contact with the IC tag attached to a specific range around the rotation shaft hole of the reel .
A reel management system characterized by that. In the reel management system according to claim 1,
The reel management system includes a control unit, the reader / writer device, a plurality of loop antennas, an upper antenna switch, a plurality of lower antenna switches, a distribution coupler, and a plurality of tuners. , The plurality of loop antennas are combined into one unit by the distribution coupler,
The input signal from the reader / writer device is distributed by the distribution coupler, each distribution signal is tuned by each tuner, and a magnetic field generated from each loop antenna forming the unit based on the current of each tuning signal. A reading area formed with a strong magnetic field between each of the loop antennas forming the unit,
The lower antenna switch is arranged for each of a plurality of shelf plates constituting the storage shelf,
The reel management system, wherein the loop antenna is arranged in a direction perpendicular to the shelf board, and an opening surface is perpendicular to the shelf board. In the reel management system according to claim 1,
A specific range around the rotation axis hole of the reel is a range within 30 mm from the center of the rotation axis of the reel, and a reading range of the loop antenna is a range within 30 mm from the center of the rotation axis hole of the reel. A reel management system, wherein the IC tags are provided so as to cover each other, and the IC tags are provided so that the probability of occurrence of overlap of the IC tags between the adjacent reels is less than 1/6. In the reel management system according to claim 1,
Information of the IC tag attached to the reel using the same loop antenna regardless of the size of the reel by changing the installation height and depth of the loop antenna in the storage shelf according to the size of the reel Reel management system characterized by reading.