JP6464235B2 - Method for manufacturing concrete structure with embedded IC tag and IC tag - Google Patents

Description

  The present invention relates to a method of manufacturing a concrete structure embedded with an IC tag and an IC tag, and more particularly to a method of manufacturing a concrete structure embedded with an IC tag and an IC capable of reliably reading data stored in the IC tag. Regarding tags.

  Conventionally, a method of embedding an IC tag in a concrete structure and a method of managing a concrete structure using the same have been proposed. According to Japanese Patent Laid-Open No. 2007-7927 (Patent Document 1), in a method for manufacturing a concrete structure in which a recess is formed on the lower surface or side surface of a concrete structure and an embedded object is disposed in the recess, the concrete structure is molded. A convex portion corresponding to the concave portion is provided in the mold frame to be formed, concrete is molded using the mold frame, and after removing the mold frame, an IC tag is disposed in the concave portion of the concrete.

  According to Japanese Patent Application Laid-Open No. 2007-216527 (Patent Document 2), a process in which the periphery and back surface of an IC tag are previously hardened with a cement material or other molding material, and an IC hardened with the molding material on a concrete formwork surface. A step of temporarily fixing the tag with an adhesive or a pressure-sensitive adhesive, a step of placing concrete on the IC tag side using the concrete formwork, and the IC tag is left on the surface of the concrete structure after the concrete is solidified. And demolding the concrete formwork.

  According to Japanese Patent Application Laid-Open No. 2008-137284 (Patent Document 3), the L-type retaining wall has a thin plate-like IC tag in the vicinity of the placement surface of the concrete body, and the antenna surface of the antenna portion is a side surface of the concrete body. Embedded to be parallel. Specifically, the formwork is assembled into the shape of an L-shaped retaining wall, a predetermined ready-mixed concrete is placed in the formwork, and the IC tag is placed on the antenna portion of the IC tag from the surface of the ready-made concrete. Is embedded in ready-mixed concrete so as to be positioned in the vicinity of the casting surface and in the vicinity of the inner surface of one mold. Further, there is a description that it is preferable that the antenna surface of the antenna portion of the IC tag is parallel to the inner surface of the mold in consideration of sensitivity and stability at the time of writing / reading the IC tag.

  According to Japanese Patent No. 4232117 (Patent Document 4), an IC tag has a non-volatile function composed of an antenna portion, a semiconductor material, and the like, which are mixed in a cement product manufacturing process, and capable of writing and reading information by wireless communication. It has a power unit that generates power by resonating with the received radio waves without using a memory device, and has a three-dimensional shape and is kneaded together in the cement product to be mixed without being unevenly distributed when the cement product is kneaded. IC tag writing connected to the automatic measuring device while measuring the product characteristic value of the cement product with an automatic measuring device arranged in the measuring process of the cement product, which is formed with the same size and specific gravity as the aggregate to be measured The device automatically writes product information such as the product characteristic value and date of manufacture measured by the automatic measuring device, and the cement product is placed on site. After a, it is possible to read the data recorded in the IC tag of the structure in using the IC tag reader.

JP 2007-7927 A JP 2007-216527 A JP 2008-137284 A Japanese Patent No. 4232117

  A conventional method for manufacturing a concrete structure in which an IC tag is embedded and a method for managing a concrete structure using an IC tag have been configured as described above. Here, the IC tag is an RFID (Radio Frequency Identification) system using an RF tag, and the RF tag is a one-chip IC.

  However, the conventional method has a problem that it takes time and labor to position and attach the IC tag.

  The present invention has been made to solve the above-described problems. A method for manufacturing a concrete structure with an embedded IC tag and an IC for the IC tag can be easily embedded in a predetermined position. The purpose is to provide tags.

  The method for manufacturing a concrete structure in which an IC tag is embedded is a method for manufacturing a concrete structure in which an IC tag having a first portion and a second portion located at a position different from the first portion is embedded. A method for manufacturing a concrete structure includes a step of placing an IC tag so that a second portion of the IC tag is in contact with a predetermined position on a bottom surface in a concrete mold, and an IC tag is mounted from above the placed IC tag. The IC tag includes a flat plate portion and a plurality of flat or pointed protrusions provided on both sides of the flat plate portion, and the flat plate portion is the first portion The tip of the protrusion is the second part.

  In another aspect of the present invention, the IC tag has a second portion located at a different position from the first portion. The IC tag includes a flat plate portion and a plurality of flat plate-like or pointed protrusions provided on both sides of the flat plate portion, the flat plate portion is a first portion, and the protrusion tip is a second portion. The antenna is embedded in the part.

  The IC tag is placed so that the second portion of the IC tag is in contact with a predetermined position on the bottom surface in the concrete formwork, and the ready-mixed concrete is poured from the top of the placed IC tag to fill the IC tag. The tag embedding position is a predetermined position on the bottom surface of the concrete formwork.

  As a result, it is possible to provide a method for manufacturing a concrete structure in which an IC tag is embedded and an IC tag for the method, in which the IC tag can be easily embedded in a predetermined position.

It is a perspective view which shows the concrete structure with which the IC tag which concerns on one embodiment of this invention was embedded. It is a figure which shows the formwork which forms the concrete structure shown in FIG. It is a figure which shows the IC tag embedded in a concrete structure. It is a figure which shows the method of embedding the IC tag shown in FIG. 3 in a concrete structure. It is a figure which shows the other IC tag embedded in a concrete structure. It is a figure which shows the further another IC tag embedded in a concrete structure. It is a figure which shows another concrete structure. It is a perspective view which shows the formwork for creating another concrete structure.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a concrete structure in which an IC tag according to an embodiment of the present invention is embedded. FIG. 2 shows a mold for forming the concrete structure shown in FIG. It is a figure which shows the IC tag mounted in the frame.

  Referring to FIG. 1, the concrete structure in this embodiment is a U-shaped groove (hereinafter referred to as “U-shaped groove”) 40 made of concrete, and a pair of wall portions 41 a extending in the longitudinal direction, 41b and the bottom face part 42 which connects a pair of wall part 41a, 41b by the lower end surface.

  2A is a cross-sectional view of the mold 10 in a direction orthogonal to the longitudinal direction, and FIG. 2B is a cross-sectional view of a portion indicated by arrows IIB-IIB in FIG. 2A.

  Referring to FIG. 2 (A), the mold 10 has a shape obtained by reversing the U shape, and two pairs of wall members 11a, 12a, 11b, 12b forming a pair of opposed walls, and a wall member 11a, The bottom part of 12a and bottom part 13a, 13b which connects each lower part of wall member 11b, 12b, and the upper side connection part 14 which connects inner wall member 12a, 12b in the upper end part are included. Referring to FIG. 2B, end wall members 15 and 16 are provided at both ends in the longitudinal direction of the mold 10, thereby forming a rectangular opening 18 at the upper end of the mold 10. Yes.

  As shown in FIGS. 2A and 2B, here, the IC tag 20 has a corrugated shape having a certain width, and the width direction is sandwiched between the wall members 11a and 12a on one side of the mold 10. Thus, it is placed close to the one end wall member 15 of the mold 10 so that the corrugation extends in the longitudinal direction.

  Next, the IC tag 20 will be described. FIG. 3 is a diagram showing the IC tag 20. 3A is a plan view (an arrow view indicated by an arrow IIIA-IIIA in FIG. 3B), and FIG. 3B is a side view (an arrow indicated by an arrow IIIB-IIIB in FIG. 3A). View). Referring to FIG. 3, IC tag 20 has a wave shape having a certain width, and includes an upper layer 21, a lower layer 23, and an intermediate layer 22 sandwiched between upper layer 21 and lower layer 23. The intermediate layer 22 includes an antenna that becomes an IC tag. Further, when viewed from the side, the IC tag 20 periodically includes an upper convex portion (first portion) 24 protruding upward and a lower convex portion (second portion) 25 protruding downward. As shown in FIG. 3B, the lower convex portion 25 is placed on the bottom portion 13 a of the mold 10.

  The IC tag and the resin may be integrated and formed into a corrugated plate shape without being sandwiched between corrugated upper and lower layers.

  As shown in FIG. 2, when the IC tag 20 is placed on the mold 10, the lower convex portion 25 of the IC tag 20 is placed so as to contact the bottom portion 13 a of the mold 10.

  FIG. 3C is a plan view showing a modified example of the IC tag 20 and corresponds to FIG. The side view is the same as FIG. With reference to FIG.3 (C), in the modification, the width | variety of the upper side convex part 24 of the IC tag 20 is wide, and the width | variety of the lower side convex part 25 is narrow.

  With such a configuration, the protruding portion 24a of the upper convex portion 24 of the IC tag 20 is disposed so as to be in point contact with the inside of the wall members 11a, 12a or 11b, 12b. As a result, the IC tag 20 can be disposed along the wall without being exposed.

  FIG. 3D is a plan view showing a further modification of the IC tag 20. Here, both end portions in the width direction of the IC tag 20 are parallel corrugations having the same period. Also in this case, the projecting portion has the same effect as in FIG.

  Next, a method for manufacturing a concrete structure according to this embodiment will be described. FIG. 4 is a diagram showing a method for manufacturing the U-shaped groove shown in FIG. 1 in which the IC tag 20 shown in FIG. FIG. 4 shows a cross section shown in FIG.

  With reference to FIG. 4A, the IC tag 20 is placed on the one end 15 of the mold 10. Then, the discharge port 30 for discharging the ready-mixed concrete is positioned directly above the IC tag 20, and the ready-mixed concrete is discharged onto the IC tag 20 from the discharge port 30. The discharge port 30 moves in the direction indicated by the arrow A in the figure. The IC tag 20 is pressed from above by the discharged ready-mixed concrete and, as indicated by an arrow C in FIG. 3A, from the side surface between the back side 26 of the upper convex portion 24 and the bottom portion 13a of the mold 10. Because the space is filled with ready-mixed concrete, it is almost fixed at the place where it is placed. As a result, the IC tag 20 is embedded in the concrete structure with the lower convex portion 25 in the vicinity of the bottom surface in the mold 10 or in contact with the bottom surface.

  Thereafter, the ready-mixed concrete discharge port 30 is moved in the direction of arrow A as shown in FIG. 4B, and the ready-mixed concrete is filled into the mold 10 to the opposite end. Thereafter, as shown in FIG. 4C, the discharge port 30 is moved in the opposite direction (the direction of arrow B). By repeating this, the entire concrete form 10 is filled with the ready-mixed concrete 31, and the U-shaped groove 40 in which the IC tag 20 is embedded is completed.

  Here, ready-mixed concrete is a mixture of water, cement, fine aggregate (sand), and coarse aggregate (gravel), and its specific gravity is about 2.3.

  On the other hand, in this embodiment, the specific gravity of the IC tag 20 is around 1 because the IC tag is covered with a resin such as polycarbonate. The particle size of the coarse aggregate is 5 to 40 mm.

  In the U-shaped groove 40 thus manufactured, the IC tag 20 is embedded at a position near the upper surface 43 of the wall surface 41 on one side of the U-shaped groove 40 in FIG. Therefore, if information such as the ID of the U-shaped groove 40, the product name, the manufacturing date, the manufacturing factory, and the composition is recorded in the IC tag 20, the information can be surely known using the reading device.

  The reason why the IC tag hardly deviates from the predetermined position as described above is that the ready-mixed concrete spreads as follows. In other words, the ready-mixed concrete does not move sideways like a tsunami. This is because the ready-mixed concrete spreads without moving largely because the stacked ready-mixed concrete collapses instead of being pushed from the side.

  Next, another embodiment of the present invention will be described. In the above embodiment, the case where the corrugated IC tag 20 is used for embedding the IC tag near the surface of the concrete structure has been described. However, in this embodiment, the IC tag having another shape is described. To do.

  FIG. 5 is a diagram showing IC tags 50 and 60 having other shapes. FIG. 5A is a perspective view showing an IC tag 50 having plate-like legs. Referring to FIG. 5A, an IC tag 50 includes a rectangular flat plate portion 51 (first portion) and a pair of legs extending in a flat plate shape obliquely upward at both longitudinal ends of the flat plate portion 51. Parts 52a, 52b (second part) and a pair of leg parts 52c, 52d (second part) extending in a diagonally downward direction at both ends in the longitudinal direction of the flat plate part 51. The main part (antenna or memory) of the IC tag 50 is accommodated in the flat plate part 51.

  If the IC tag 50 is placed at a predetermined position near the end face in the mold 10 as shown in FIG. 2, a U-shaped groove in which the main part of the IC tag 50 is located near the surface can be provided.

  FIG. 5B is a perspective view showing an IC tag 60 having a pointed leg. Referring to FIG. 5B, the IC tag 60 includes six pairs of rectangular flat plate portions 61 (first portions) and diagonally outwardly extending on both sides of the flat plate portion 61 in the longitudinal direction. Leg portions 62a to 62f and 63a to 63f (second portion). The antenna and memory, which are the main parts of the IC tag 60, are accommodated in the flat plate part 61.

  If the IC tag 60 is placed so that the bottom part of the IC tag 60 comes into contact with a predetermined position in the mold 10 as shown in FIG. 2, a U-shaped groove in which the main part of the IC tag 60 is located near the surface is provided. it can.

  As described above, the IC tags 20, 50, 60 are embedded in the upper surface end portion of the U-shaped groove 40. This embedding position can be arranged so as not to protrude from the U-shaped groove side surface 41 and the U-shaped groove upper surface 43 and at a position within 30 mm from the surface.

  Since the corrugated shape and the legged IC tag are in contact with the formwork per point or per line, the IC tag is excellent in self-supporting property, and the IC tag exists in the vicinity of the formwork even when placing the ready-mixed concrete. The communication accuracy during reading is also improved.

  Next, another embodiment will be described. FIG. 6 is a view showing an IC tag 70 of still another shape. The IC tag 70 according to this embodiment includes a spacer. Here, the spacer is a material used in construction work to fix the reinforced concrete at a predetermined position so as not to move and to maintain a necessary cover thickness when placing reinforced concrete. The spacer is made of concrete, mortar, plastic, or the like.

  FIGS. 6A to 6C are diagrams illustrating an example in which the spacer 70a and the like are made of concrete or mortar. Referring to FIG. 6A, IC tag 70 includes a spacer 70a and a main part 78 of the IC tag including an antenna or the like housed inside spacer 70a. The spacer 70a has a substantially rectangular parallelepiped shape as a whole, and has a U-shaped groove 76 on the upper surface thereof. That is, the spacer 70a is connected to the lower surface 71, which is connected to the lower surface 71, which is in contact with the lower surface 71, the side surfaces 72, 73 parallel to the direction in which the U-shaped groove extends. Side surfaces 74 and 75 orthogonal to the direction in which the letter-shaped grooves extend.

  In the IC tag 70, the position where the main part 78 of the IC tag such as an antenna is provided is the first part, and the lower surface 71 is the second part. In addition, a reinforcing bar 77 (shown by a dotted line in the figure) or the like constituting the concrete structure is placed in the U-shaped groove 76.

  FIG. 6B is a modified example of the spacer shown in FIG. Referring to FIG. 6B, in this example, U-shaped grooves 76 are formed on four surfaces excluding side surfaces 74 and 75. Accordingly, since the spacer 70b has grooves formed on the four surfaces, a plurality of surfaces can be used as surfaces to be placed on the mold, and the contact area with the mold can be reduced.

  In this case, it is preferable to be parallel to the surface on which the main part 78 extends and the bottom surface of the abutting mold, but this is not restrictive, and reading by a reader is possible in any direction.

  Note that the spacer is not limited to the above, and the entire spacer may be cylindrical as shown in FIG. In this example, the lower surface is provided with a pair of protrusions on the lower surface so as to contact the mold only at a part of the lower surface so as to reduce the contact area with the mold.

  Next, the case where the spacer 70a is made of plastic will be described with reference to FIG. In the case of the plastic spacer, the thin spacers 70c and 70d having the same shape are continuously formed in the extending direction of the reinforcing bar as compared with the case of the concrete shown in FIGS. 6 (A) to 6 (C). Is provided. Referring to FIG. 6D, here, the pair of thin spacers 70c and 70d are connected by a connecting plate 70e made of plastic.

  In the above embodiment, since the IC tag has the concave groove 76 for holding the reinforcing bar, there is an effect that the IC tag itself is positioned by the reinforcing bar.

  In each of the above embodiments, the principal part of the IC tag is indicated by a rectangular dotted line. In this case, the same effect as in the previous embodiment can be obtained.

  In these embodiments, the IC tag 20 (including 50, 60, 70) is embedded at most about 30 mm from the position where it contacts the walls 41a, 41b and the bottom surface 42 of the U-shaped groove 40. The operator reads the IC tag at a position that is usually about 1 m away from the U-shaped groove 40. However, since the reading distance of the IC tag 20 is generally within 1.5 m, the information from the IC tag 20 can be read sufficiently.

  Next, another concrete structure (tension block) in which an IC tag is embedded will be described. FIG. 7 is a view showing another concrete structure 80, and FIG. 8 is a view showing a mold 90 for the same.

  Referring to FIG. 7, the concrete structure 80 includes a rectangular flat plate portion 81 and four leg portions 82 a to 82 d provided on the back surface of the flat plate portion 81. Further, the IC tag 20 is embedded in a corner portion on one side surface of the rectangular flat plate portion 81.

  Next, the formwork 90 in this case will be described. FIG. 8 is a perspective view of the mold 90. Referring to FIG. 8, mold 90 includes a portion 91 that forms a flat plate portion and portions 92 a to 92 d that form four leg portions.

  When pouring the ready-mixed concrete into the mold 90, the legs (92c, 92d in this case) on the one end side in the longitudinal direction of the portions 92a to 92d forming the four legs are the floor surface. In this state, as in FIG. 4, the corners of the mold 90 are arranged so that the longitudinal direction is parallel to the floor surface (in this case, the corners in the vicinity of the legs 92). The IC tag 20 is placed on the part. Thereafter, ready-mixed concrete is poured from above the IC tag 20.

  In addition, as a formwork, you may use a formwork that the rectangular flat plate part 81 becomes parallel to a floor surface.

  Alternatively, a plurality of molds may be continuously arranged on a plane, and ready-mixed concrete may be poured in order to continuously manufacture a plurality of concrete structures.

  Next, characteristics of ready-mixed concrete for embedding an IC tag in this way will be described. The slump value of ready-mixed concrete exists as an index indicating the fluidity of ready-mixed concrete. The larger this value, the higher the fluidity of ready-mixed concrete.

  In this embodiment, this value is preferably about 80 to 150 mm. If the slump value is large, the fluidity is improved and the IC tag may move from a predetermined position. Conversely, if the slump value is small, the lower surface side of the IC tag is not filled with ready-mixed concrete.

  Further, the fluidity (slump value) of the ready-mixed concrete and the speed at which the discharge nozzle 30 is moved are not particularly limited.

  In the embodiment described above, the case where the ready-mixed concrete is placed by moving the nozzle and spreading the whole is described. However, the present invention is not limited to this. Depending on the fluidity of the concrete, ready-mixed concrete may be poured.

  As described above, by embedding an IC tag in a concrete structure, it is possible to manage the information of the concrete semipermanently compared to a method of pasting on a concrete structure that has been conventionally used.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  According to the present invention, it is possible to provide a method for manufacturing a concrete structure in which an IC tag capable of reading recorded data easily and reliably is provided. Therefore, it is advantageous as a method for embedding an IC tag in a concrete structure. Used for.

  10 Formwork, 11a, 12a, 11b, 12b Wall member, 13a, 13b Bottom part, 14 Upper connection part, 15, 16 End wall member, 18 Opening, 20, 50, 60, 70 IC tag, 40 U-shaped groove, 41a, 41b Wall part, 42 Bottom part, 43 Upper surface, 80 Concrete structure.

Claims (2)

A method for manufacturing a concrete structure in which an IC tag having a first part and a second part located at a position different from the first part is embedded,
Placing the IC tag such that the second portion of the IC tag is in contact with a predetermined position on the bottom surface in the concrete mold;
Pouring ready-mixed concrete so as to fill the IC tag from the upper part of the placed IC tag,
The IC tag includes a flat plate portion and a plurality of flat plate-like or pointed protrusions provided on both sides of the flat plate portion,
Said plate is a first portion, wherein a protruding tip is the second part, the protrusions you contact line contact or point outside the mounting portion, the manufacturing method of the concrete structure. An IC tag having a second portion located at a position different from the first portion, wherein the IC tag includes a flat plate portion and a plurality of flat plate-like or pointed protrusion portions provided on both sides of the flat plate portion. Including
The flat plate part is the first part, the tip of the protrusion part is the second part, and the protrusion part is in line contact or point contact with the external placement part ,
An IC tag in which an antenna is embedded in the first part.

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