JP2013109480A - Ic tag and steel material management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an IC tag capable of suppressing missing of steel material information without interfering with various types of processing steps of the steel material, and to provide a steel material management system.SOLUTION: The IC tag comprises: an IC tag body 11 including an IC chip; a protective cover 12 covering the IC tag body 11 and constituted of a resin material; and a magnet 13 disposed in the protective cover 12. The protective cover 12 includes: a protrusion portion 12a for storing the IC tag body 11, the side face outer periphery part thereof being formed into a circular shape; and a flange portion 12b that extends from the protrusion portion 12a and is stuck to the steel material. In the steel material management system including the IC tag 1 and an IC tag reader 2, the IC tag 1 is disposed on a front end face Pf in the conveyance direction of the steel material P.

Description

  The present invention relates to an IC tag and a steel material management system, and more particularly, to an IC tag suitable for managing a process from carrying in a steel material to painting and a steel material management system using the IC tag.

  In order to reduce waste, manufacturers and the like using steel materials such as steel plates often place orders for the length and width of steel materials at intervals of 10 mm and the plate thickness at intervals of 0.5 mm. For this reason, it is difficult to visually distinguish even steels of different sizes. Moreover, there exist types, such as high-tensile steel and mild steel with which intensity | strength differs, and it is also difficult to identify these steel materials from appearance. Therefore, it is common practice to identify steel materials by printing, stamping, or attaching labels to the surface of steel materials such as steel types, standards, product numbers, and sizes.

  However, steel materials are often stored in piles, and when steel material information is printed on the surface of steel materials, the steel material information cannot be read immediately, and the steel material information must be shifted or moved. Cannot be read. Therefore, various identification methods have been proposed in which steel material information is printed on the end face and side surface of the steel material (see, for example, Patent Documents 1 to 3).

  Patent Document 1 describes an identification method in which a barcode is printed directly on an end face of a steel plate. Patent Document 2 describes an identification method in which a metal plate with a marking representing steel material information at a predetermined depth in the plate thickness direction is attached to an end surface of a steel material. Patent Document 3 describes a method in which an IC tag having a semiconductor chip having a planar dimension of 0.5 mm or less is disposed on the side surface of a steel material.

JP 2009-15784 A JP 2001-334307 A JP 2003-296679 A

  By the way, steel materials are often left outdoors until they are used in products. As described in Patent Document 1 described above, when steel material information is directly printed on steel materials, the steel material information is rusted. May disappear. In addition, the steel material carried into the steel material yard is subjected to processing such as washing with water, drying, shot blasting, painting, etc., and in that process, the steel material information that has been printed, stamped, and (paper) labeled is lost. May end up. If the steel material information has disappeared, the work such as printing, engraving and labeling must be performed again.

  In addition, steel plates used in the field of shipbuilding and the like are often guided by guide rollers arranged on both sides of the conveyance line, and as described in Patent Document 2 and Patent Document 3, When a metal label or an IC tag is arranged, there is a possibility that the guide roller may be obstructed, or the IC tag may be damaged and the steel material information may be lost.

  In addition, when a metal label as described in Patent Document 2 is used for a steel plate having a plate thickness of about several mm to 50 mm, there is a limit to the amount of information that can be displayed on the metal plate, and characters and the like can be reduced. If so, the visibility is lowered. Further, as described in Patent Document 3, even if the semiconductor chip is downsized, depending on the configuration of the entire IC tag, it cannot withstand treatments such as water washing, drying, shot blasting, painting, etc. It may be lost or damaged.

  The present invention was devised in view of the above-described problems, and provides an IC tag and a steel material management system that can suppress the disappearance of steel material information without inhibiting various processing steps of the steel material. With the goal.

  According to the present invention, in an IC tag having an IC chip storing steel material information, an IC tag body incorporating the IC chip, a protective cover made of a resin material covering the IC tag body, and the protective cover A magnet disposed inside, and the protective cover includes a protruding portion having a circular outer peripheral portion for storing the IC tag main body, and extends from the protruding portion and is attached to a steel material. An IC tag having a flange portion is provided. Note that “the outer peripheral portion of the side surface is circular” means that the protruding portion is a part of a columnar shape or a spherical shape, for example, that the vertical cross section of the protruding portion is circular. I mean.

  According to the present invention, in the steel material management system having an IC tag having an IC chip storing steel material information, and an IC tag reader for reading the steel material information from the IC tag, the IC tag includes the IC chip. An IC tag main body, a protective cover made of a resin material covering the IC tag main body, and a magnet disposed in the protective cover. The protective cover includes the IC tag main body. It is constituted by an IC tag having a protruding portion in which the outer peripheral portion of the side to be stored is formed in a circular shape, and a flange portion that extends from the protruding portion and is affixed to the steel material, and on the front end surface in the conveying direction of the steel material A steel material management system is provided, wherein the IC tag reader is configured to be movable along a front end surface of the steel material as the steel material is conveyed. .

  In the above-described IC tag and steel material management system, the magnet may be incorporated in the protruding portion or may be incorporated in the flange portion. Moreover, the said protective cover may have a tab for peeling formed in the said flange part. The protective cover may be colored differently depending on the type of the steel material. The protective cover includes a first protrusion that stores the IC tag main body, and a second protrusion that is disposed on both sides of the first protrusion and stores the magnet. You may form so that a 1st protrusion part and said 2nd protrusion part may be connected. Furthermore, you may have the magnetic flux adjustment member which covers the said magnet from the outer side with respect to a sticking surface.

  In the above-described steel material management system, the IC tag reader includes a flat-plate-like leader main body portion facing the front end surface of the steel material, and a guide roller that is disposed on both sides of the leader main body portion and rolls on the front end surface of the steel material. And a parallel link mechanism that supports the mobile body so as to be movable along the front end surface of the steel material. After the steel material passes through the parallel link mechanism, the mobile body is returned to its original position. And an urging member for returning the position.

  According to the above-described IC tag and steel material management system according to the present invention, the projecting material for shot blasting (for example, an iron ball) is made into an IC by forming the outer peripheral portion of the side surface of the protruding portion for storing the IC tag main body into a circular shape. The area perpendicular to the tag (protective cover) can be reduced, the impact generated during shot blasting can be mitigated, the IC tag can be prevented from falling off and being damaged, and the loss of steel information can be prevented. Can be suppressed. Further, by using a magnet for attaching the IC tag and using a resin material for the protective cover, the steel material is resistant to water washing, drying, painting, and the like, and the loss of steel material information can be suppressed. Therefore, the loss of steel material information can be suppressed without hindering various processing steps of the steel material. As a result, a rework process such as reprinting of steel material information can be omitted, and work efficiency can be improved.

  Moreover, according to the steel material management system which concerns on this invention mentioned above, by arrange | positioning an IC tag in the front end surface of the conveyance direction of steel materials, an IC tag does not interfere with the guide roller which guides steel materials, Damage can also be suppressed. Therefore, the disappearance of the steel material information can be suppressed without hindering the steel material conveyance process.

It is a figure which shows the IC tag which concerns on 1st embodiment of this invention, (a) is a top view, (b) is a side view, (c) is explanatory drawing which shows an effect | action. It is a figure which shows the modification of the IC tag shown in FIG. 1, (a) has shown the 1st modification, (b) has shown the 2nd modification, (c) has shown the 3rd modification. It is a figure which shows the IC tag which concerns on 2nd embodiment of this invention, (a) is a perspective view, (b) is sectional drawing, (c) has shown sectional drawing of the modification. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the steel material management system which concerns on embodiment of this invention, (a) is the sticking state of an IC tag, (b) is the positional relationship of an IC tag and an IC tag reader, (c) is the front of an IC tag reader FIG. 4D shows a moving mechanism of the IC tag reader. FIGS. 5A and 5B are explanatory diagrams showing a reading operation of the IC tag reader shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, FIG. 1 is a figure which shows the IC tag which concerns on 1st embodiment of this invention, (a) is a top view, (b) is a side view, (c) shows explanatory drawing which shows an effect | action. ing. FIG. 2 is a diagram showing a modification of the IC tag shown in FIG. 1, wherein (a) shows a first modification, (b) shows a second modification, and (c) shows a third modification. Yes.

  The IC tag according to the first embodiment of the present invention is an IC tag 1 having an IC chip that stores steel material information, and includes an IC tag main body 11 incorporating an IC chip and a resin material that covers the IC tag main body 11. The protective cover 12 includes a magnet 13 disposed in the protective cover 12, and the protective cover 12 includes a protrusion 12 a having a circular outer peripheral portion for storing the IC tag main body 11. And a flange portion 12b that extends from the protruding portion 12a and is attached to the steel material P.

  The IC tag 1 is configured such that an IC chip and a small antenna are embedded in the IC tag main body 11, and information stored in the IC chip can be read by radio waves without contact. For reading information, a dedicated reader (reader) using radio frequency (RF) is used to read the ID number (information representing the individual) stored in the IC tag 1, so that the RFID tag Called. In addition to ID numbers, IC chips include steel types (for example, high-tensile steel, mild steel, etc.), standards, product numbers, sizes (length, width, plate thickness), shapes (flat steel, mold steel, steel pipe, etc.), etc. Steel material information is stored.

  As the IC tag 1, for example, an electromagnetic induction method using an HF (High Frequency) band and suitable for near field communication having a communication distance of about 20 to 60 mm is used. HF (short wave) is a radio wave having a frequency in the short wave band (3 to 30 MHz) of the electromagnetic wave. The electromagnetic induction type IC tag 1 is a so-called passive tag, which obtains electric power from a reader's radio wave and transmits the radio wave. For example, a steel plate for shipbuilding has a thickness of about several mm to 50 mm and is often stacked and stored. Therefore, when the communication distance of the IC tag 1 is increased, the radio wave received by the reader is determined by which IC tag 1 It is difficult to distinguish whether it was sent from. Therefore, the IC tag 1 having a short communication distance is used. In addition, you may use the active tag which has a battery in the IC tag main body 11 as needed.

  The magnet 13 is, for example, a neodymium magnet, and has a magnetic force (adsorptive power) that prevents the IC tag 1 from dropping or shifting from the steel material P in processing such as washing with water, drying, shot blasting, and painting. Moreover, in order to supplement the magnetic force of the magnet 13, as shown in FIG.1 (b), you may make it arrange | position the adhesive material 14 (an adhesive agent, an adhesive tape, etc.) on the sticking surface of the protective cover 12. FIG.

  The protective cover 12 is a member that holds the IC tag main body 11 and the magnet 13 and protects them from external force. The steel material P such as a steel plate is subjected to a shot blasting process in which a projection material such as an iron ball is hit for rusting or polishing. Therefore, the protective cover 12 is made of a resin material having an elastic force, such as a rubber material or a silicon resin material, in order to reduce an impact in the shot blasting process.

  As illustrated in FIGS. 1A and 1B, the protective cover 12 includes, for example, a substantially columnar protrusion 12 a. An IC tag body 11 and a magnet 13 are built in the protruding portion 12a. Thus, by consolidating the components built in the protruding portion 12a, the plate thickness of the flange portion 12b can be reduced, and the resistance value during shot blasting can be reduced. Further, as shown in FIG. 1 (c), since the projecting portion 12a has a circular outer periphery on the side surface, even when a shot blasting projection material is driven from above, the IC tag 1 can be reduced, and the impact generated during shot blasting can be reduced.

  As shown in FIG. 1A, the flange portion 12b has, for example, a plate shape with a width W extending on both sides of the protruding portion 12a. By forming the flange portion 12b, the contact area with the steel material P can be increased, and the adsorption force can be improved. When the IC tag 1 is attached to a steel plate, the width W is formed to be smaller than the desired plate thickness of the steel plate. In the case of the steel material P having a sufficient area for attaching the IC tag 1, the flange portion 12b may have a substantially circular shape or a rectangular shape extended over the entire circumference of the protruding portion 12a.

  According to the above-described IC tag 1 according to the present invention, the impact on the shot blasting can be alleviated by forming the outer peripheral portion of the side surface of the protruding portion 12a storing the IC tag main body 11 in a circular shape. 1 can be prevented from falling off or damaged, and the loss of steel material information can be suppressed. Further, the magnet 13 is used for attaching the IC tag 1 and the resin material is used for the protective cover 12, so that the steel material P is resistant to water washing, drying, painting, and the like, and the loss of steel material information can be suppressed. .

  Next, a modified example of the above-described IC tag 1 will be described. In the first modification shown in FIG. 2A, the protective cover 12 is colored differently depending on the type of the steel material P. In the figure, the coloring is changed by changing the direction of the oblique line. For example, by coloring high-strength steel in red and mild steel in yellow, the steel type can be easily identified visually without reading the steel material information of the IC tag 1 with a reader. Problems can be reduced. The protective cover 12 may be colored by containing a pigment or the like in the resin material itself, or a sheet member such as a colored felt material may be stuck on the surface.

  The 2nd modification shown in FIG.2 (b) forms the protrusion part 12a by the spherical surface. According to such a configuration, an inclined surface can be formed also in the protruding direction of the protective cover 12, and the impact of the projection material during shot blasting can be reduced.

  In the third modification shown in FIG. 2C, the magnet 13 is built in the flange portion 12b. A granular iron ball is often used for the projection material B in the shot blasting of the steel material P. When the magnet 13 is used for the IC tag 1, the projection material B is easily adsorbed around the magnet 13. Therefore, the IC tag body 11 can be prevented from being buried in the projection material B by separating the magnet 13 from the IC tag body 11.

  Next, the IC tag 1 according to the second embodiment of the present invention will be described. Here, FIG. 3 is a figure which shows the IC tag which concerns on 2nd embodiment of this invention, (a) is a perspective view, (b) is sectional drawing, (c) shows sectional drawing of a modification. ing. In addition, about the same component as 1st embodiment mentioned above, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  As shown in FIGS. 3A and 3B, the IC tag 1 according to the second embodiment of the present invention includes a first protruding portion 12c in which the protective cover 12 stores the IC tag main body 11, and a first cover. The second protrusion 12d is disposed on both sides of the protrusion 12c to store the magnet 13, and the flange 12b is formed to connect the first protrusion 12c and the second protrusion 12d. . The protective cover 12 has a peeling tab 12e formed at one end of the flange portion 12b.

  The first projecting portion 12c and the second projecting portion 12d basically have substantially the same shape as the projecting portion 12a in the first embodiment, and have a substantially cylindrical shape or a spherical surface shape. Thus, by arranging the IC tag main body 11 and the magnet 13 apart from each other, as shown in FIG. 3B, the projection material B used for shot blasting has the magnet 13 (second protruding portion). It is possible to prevent the projection material B from adsorbing around the IC tag main body 11 (first projecting portion 12c). Therefore, even after the shot blasting process, the IC tag 1 can be read by the reader without removing the projection material B. The separation distance between the IC tag main body 11 (first protruding portion 12c) and the magnet 13 (second protruding portion 12d) can be arbitrarily set by adjusting the length of the flange portion 12b.

  Moreover, the state which stuck the IC tag 1 to the steel material P can be stabilized by arrange | positioning the magnet 13 on both sides of the IC tag main body 11. FIG. Further, when the IC tag 1 has a high adsorption force, it may be difficult to remove the IC tag 1. Therefore, as shown in the figure, a peeling tab 12e is formed. Tab 12e is formed so that a crevice may arise between the pasting surface of IC tag 1, and the surface of steel materials P. FIG. By this gap, the operator can easily grasp the tab 12e and peel off the IC tag 1. The tab 12e may be formed on the IC tag 1 according to the first embodiment shown in FIGS. 1 and 2 and its modification.

  Moreover, the modification shown in FIG.3 (c) has the magnetic flux adjustment member 15 which covers the magnet 13 from the outer side with respect to a sticking surface. The magnetic flux adjusting member 15 is made of a magnetic material such as iron and has a U-shaped cross section. The bottom surface of the magnetic flux adjusting member 15 is arranged so as to have a certain gap so as not to contact the magnet 13. By arranging the magnetic flux adjusting member 15, as shown in the figure, the magnetic flux can be concentrated on the sticking surface side of the IC tag 1, the attraction force can be improved, and the surface on the side opposite to the sticking surface can be improved. The adsorption force can be reduced, and the adsorption amount of the projection material B during shot blasting can be reduced.

  Subsequently, a steel material management system according to an embodiment of the present invention will be described with reference to FIGS. 4 and 5. Here, FIG. 4 is a figure which shows the steel material management system based on embodiment of this invention, (a) is the pasting state of an IC tag, (b) is the positional relationship of an IC tag and an IC tag reader, (c ) Is a front view of the IC tag reader, and (d) is a moving mechanism of the IC tag reader. FIGS. 5A and 5B are explanatory diagrams showing the reading operation of the IC tag reader shown in FIG. 4, wherein FIG. 5A shows the reading start, FIG. 5B shows the reading operation, and FIG. 5C shows the reading end. .

  A steel material management system according to an embodiment of the present invention is a steel material management system having an IC tag 1 having an IC chip storing steel material information, and an IC tag reader 2 for reading the steel material information from the IC tag 1, The tag 1 includes an IC tag main body 11 incorporating an IC chip, a protective cover 12 made of a resin material that covers the IC tag main body 11, and a magnet 13 disposed in the protective cover 12. The cover 12 is formed of an IC tag 1 having a protruding portion 12a having a circular outer peripheral portion for storing the IC tag main body 11 and a flange portion 12b extending from the protruding portion 12a and attached to the steel material P. The IC tag reader 2 is configured to be movable along the front end surface Pf of the steel material P along with the transport of the steel material P while being arranged on the front end surface Pf in the transport direction of the steel material P. It has been.

  The IC tag 1 is configured by the above-described first embodiment, second embodiment, or a modification thereof. By using the IC tag 1 according to the embodiment of the present invention, operations suitable for steel material management can be performed, and various processing steps (washing, drying, shot blasting, painting, etc.) of the steel material P are hindered. And disappearance of steel material information can be suppressed. In addition, in order to reduce reading omission etc., the IC tag 1 may be arranged with a plurality of the same IC tags 1, or a plurality of IC tags 1 that individually store steel material information suitable for each processing step. It may be arranged.

  The IC tag 1 is affixed to the front end face Pf of the steel material P as shown in FIG. Since the steel materials P such as steel plates are often stacked and stored, it is not preferable to arrange them on the surface of the steel material P. Moreover, since it is often guided by the guide rollers G arranged on both sides of the conveyance line, if it is arranged on the side surface Ps of the steel material P, it will interfere with the guide roller G or the IC tag 1 may be damaged. It will end up. Therefore, the IC tag 1 is preferably disposed on the front end surface Pf or the rear end surface of the steel material P. In particular, when the IC tag reader 2 is disposed in the transport line as in the present embodiment, the IC tag 1 can be read efficiently by being disposed on the front end surface Pf of the steel material P.

  As shown in FIG. 4C, the IC tag reader 2 includes, for example, a flat-plate-shaped reader body 21a facing the front end face Pf of the steel material P, and the front end of the steel material P disposed on both sides of the reader body 21a. Connected to the parallel link mechanism 22, a movable body 21 provided with a guide roller 21 b that rolls on the surface Pf, a parallel link mechanism 22 that supports the movable body 21 so as to be movable along the front end face Pf of the steel P And an urging member 23 for returning the movable body 21 to the original position after the steel material P has passed. The moving body 21 has a support member 21c that supports the reader main body 21a and the guide roller 21b.

  By arranging the guide roller 21b on the movable body 21, the leader body 21a can be supported so as to be movable along the front end face Pf of the steel material P, and the front end face Pf of the steel material P and the leader body 21a can be supported. A certain gap (for example, about 30 to 100 mm) can be formed between them. Therefore, as shown in FIG. 4 (b), by rolling the guide roller 21b on the front end surface Pf of the steel material P, it comes close to the IC tag 1 attached to the front end surface Pf of the steel material P. The IC tag 1 can be easily passed through the IC tag 1 while the reader main body 21a is placed at the position. The moving body 21 may be supported by the parallel link mechanism 22 so as to have a certain gap with the floor surface, and has a wheel that assists the rotation of the moving body 21 by the parallel link mechanism 22. Also good.

  The parallel link mechanism 22 has a pair of links 22 a arranged in parallel. One end of the link 22 a is connected to the floor surface, and the other end is connected to the moving body 21. Therefore, the moving body 21 can be rotated within a certain range, as indicated by a one-dot chain line in FIG. By this rotation, the moving body 21 can be retracted along with the conveyance of the steel material P so as not to disturb the conveyance of the steel material P. The moving mechanism of the IC tag reader 2 is not limited to the parallel link mechanism 22 described above, and any other configuration may be used as long as the moving body 21 can be retracted with the conveyance of the steel plate P. There may be.

  As shown in FIG. 4D, the urging member 23 is a member having an elastic body such as a spring coil or a rubber string, and one end is connected to the floor and the other end is connected to the link 22a. . By disposing the urging member 23, the moving body 21 retracted by the conveyance of the steel material P can be automatically returned to the original position after the steel material P has passed.

  For example, as shown in FIG. 5A, at the start of reading, the IC tag reader 2 is arranged in the transport line so as to be able to contact the front end surface Pf of the steel material P to be transported (parallel link). The illustrated position where the mechanism 22 is folded is defined as a 0 degree position). The IC tag 1 is disposed on the front end surface Pf of the steel material P at a position close to the side on which the IC tag reader 2 is disposed. On the other hand, the IC tag reader 2 is inserted into the transport line to a position where the IC tag 1 arranged on the front end face Pf of the steel material P can be read.

  In the state of FIG. 5A, the moving body 21 that has contacted the front end surface Pf of the steel material P is pushed away by the parallel link mechanism 22 as the steel material P is conveyed, as shown in FIG. While rotating, it slides along the front end face Pf. At this time, the reader body 21a passes while maintaining a certain distance from the IC tag 1, and at this time, the steel material information of the IC tag 1 can be read.

  After that, as shown in FIG. 5C, the moving body 21 that has been completely pushed away from the front end surface Pf of the steel material P with the conveyance of the steel material P ends the reading of the IC tag 1 and is approximately 90 degrees. The guide roller 21b rotates along the side surface Ps of the steel material P while being pressed against the side surface Ps of the steel material P by the urging member 23 while maintaining the state moved to the position. Finally, when the steel material P finishes passing, the moving body 21 loses its support and returns to the initial state (position of 0 degree) shown in FIG.

  Although not shown, the steel material information of the IC tag 1 read by the IC tag reader 2 is transmitted to a data management device connected by wire or wirelessly, and steel material management can be performed intensively. Based on the steel material information received by the data management device, the processing steps of the steel material P can be changed, the transport route can be changed, and the storage yard can be set. Further, as described above, by using the IC tag 1 according to the present embodiment, it is possible to suppress the disappearance of steel material information in each processing step such as washing, drying, shot blasting, and painting, and stable steel material management. And can be done efficiently.

  In the steel material management system described above, the IC tag reader 2 having the moving body 21 is configured to automatically read the IC tag 1 by conveying the steel material P. However, the present invention is not limited to this configuration. The worker may manually read the IC tag 1 placed on the steel material P stacked with the IC tag reader carried or the steel material P being conveyed.

  The present invention is not limited to the above-described embodiment, and it is needless to say that various modifications are possible without departing from the spirit of the present invention, such as the IC tag 1 may be disposed on the rear end surface of the steel material P.

DESCRIPTION OF SYMBOLS 1 IC tag 2 IC tag reader 11 IC tag main body 12 Protective cover 12a Protrusion part 12b Flange part 12c First protrusion part 12d Second protrusion part 12e Tab 13 Magnet 15 Magnetic flux adjustment member 21 Moving body 21a Leader main part 21b Guide roller 22 Parallel Link mechanism 23 Energizing member

Claims (8)

In an IC tag having an IC chip storing steel material information,
An IC tag body containing the IC chip;
A protective cover made of a resin material covering the IC tag body;
A magnet disposed in the protective cover,
The protective cover includes a protruding portion having a circular outer peripheral portion for storing the IC tag main body, and a flange portion that extends from the protruding portion and is attached to a steel material. tag.   The IC tag according to claim 1, wherein the magnet is built in the protruding portion or the flange portion.   The IC tag according to claim 1, wherein the protective cover has a peeling tab formed on the flange portion.   The IC tag according to claim 1, wherein the protective cover is colored differently depending on a type of the steel material.   The protective cover includes a first protrusion that stores the IC tag body, and a second protrusion that is disposed on both sides of the first protrusion and stores the magnet, and the flange portion includes the first protrusion. The IC tag according to claim 1, wherein the IC tag is formed so as to connect the protruding portion and the second protruding portion.   The IC tag according to claim 1, further comprising a magnetic flux adjusting member that covers the magnet from the outside with respect to the sticking surface. In a steel material management system having an IC tag having an IC chip storing steel material information, and an IC tag reader for reading the steel material information from the IC tag,
The IC tag is constituted by the IC tag according to any one of claims 1 to 6, and is disposed on a front end surface in a conveying direction of the steel material.
The IC tag reader is configured to be movable along a front end surface of the steel material as the steel material is conveyed.   The IC tag reader includes a flat-plate-like reader main body facing the front end surface of the steel material, and a guide roller disposed on both sides of the reader main body portion and rolling on the front end surface of the steel material. A parallel link mechanism that supports the movable body movably along the front end surface of the steel material, and a biasing member that is connected to the parallel link mechanism and returns the movable body to its original position after the steel material has passed. And a steel material management system according to claim 7.