JP2018073267A - Rf tag fixing cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover capable of firmly fixing a RF tag at an adhered body in a communicable manner and also capable of reusing the RF tag fixed at the adhered body.SOLUTION: A RF tag fixing cover 1 includes: a cover main body 10 obtained by forming, into a plate-like plastic sheet material, a protruding part 100 based on a shape of a RF tag 2 fixing an adhered body; and an adhesive layer 11 formed on a rear surface of a flange part 101 serving as a section in the cover main body 10 where the protruding part 100 is not formed. For the cover main body 10, a poly ethylene terephthalate (PET) or poly styrene (PS) is used as a material having a dielectric constant with which communication characteristic loss is not greatly deteriorated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cover used for fixing an RF tag.

  In response to the development of metal-compatible RF tags (RF: Radio Frequency) that can be communicated while attached to a metal surface, the use of RF tags for building material inventory management has been studied. Patent Document 1 discloses an RF tag having a configuration in which a functional layer having a predetermined non-dielectric constant and non-permeability is laminated on a base material layer. Also, in Patent Document 2, an RFID including a planar antenna having a dielectric substrate, a ground conductor provided on one surface of the dielectric substrate, and a patch conductor provided on the other surface of the dielectric substrate. The patch conductor has a notch formed in the patch conductor, and an IC chip is connected to an edge of the notch or a connection provided at the edge, and the impedance matching between the planar antenna and the IC chip is performed by the notch. A metal-compatible RFID tag is disclosed. In Patent Document 3, an inlay including an IC chip and an antenna, a planar auxiliary antenna stacked in an insulated state with the inlay, and a base material on which the inlay and the auxiliary antenna are stacked are provided. Is formed in a rectangular surface having a length of approximately ¼ of the wavelength of the radio frequency of the inlay, and one of the long sides thereof is approximately ８ of the length of the wavelength of the radio frequency of the inlay. It has a notch part to be divided, and the notch part is formed in a concave shape having a predetermined width and depth at which the IC chip of the inlay can be placed, which is opened at the edge of one long side. A featured metal enabled RF tag is disclosed.

  Generally, a metal-compatible RF tag is more expensive than a seal label-type RF tag. Therefore, when using a metal-compatible RF tag for inventory management of building materials, it is desirable that the metal-compatible RF tag can be reused. As an invention that makes it possible to reuse a metal-compatible RF tag affixed to a metal adherend such as a building material, Patent Document 4 proposes that a magnet for affixing to metal be provided on the back surface of the RF tag body. However, since a large impact is applied to the building material during transportation or the like, when the metal-compatible RF tag is attached to the metal building material with a magnet, there is a risk that the metal-compatible RF tag is detached from the building material.

WO 2007/097385 JP 2010-62941 A JP 2014-7655 A JP 2005-78256 A

  Accordingly, an object of the present invention is to provide a cover that can firmly fix an RF tag in a state where it can communicate with an adherend such as a metal and can reuse the RF tag fixed to the adherend. .

  The present invention that solves the above-described problems includes a cover body in which a convex portion based on the shape of an RF tag fixed to an adherend is formed into a plate-like plastic sheet material, and the convex portion is not formed in the cover body. A material having an adhesive layer formed on the back surface of the flange portion to be a part and having a dielectric constant that does not greatly deteriorate the loss of communication characteristics is used for the cover body. Note that it is preferable to use PET (Poly Ethylene Terephthalate) or PS (Poly Styrene) as the material of the cover as a material having a dielectric constant that does not greatly deteriorate the loss of communication characteristics.

  According to the above-described present invention, it is possible to provide a cover that can firmly fix an RF tag in a communicable state to an adherend such as a metal and can reuse the RF tag fixed to the adherend.

The figure explaining the external appearance of the fixed cover for RF tags. The figure explaining the shaping | molding method of a cover main body. The figure explaining an example of the fixing cover for RF tags. The figure explaining the fixing method of RF tag using the fixing cover for RF tags. The figure explaining the modification of the fixed cover for RF tags.

  From here, preferred embodiments of the present invention will be described. The following description is not intended to limit the technical scope of the present invention, but is provided to aid understanding.

  FIG. 1 is a view for explaining the appearance of the RF tag fixing cover 1 according to this embodiment. The RF tag fixing cover 1 shown in FIG. 1 has a problem that the RF tag 2 can be firmly fixed to an adherend 3 made of metal or the like, and the RF tag 2 fixed to the adherend 3 can be reused. In order to solve the problem, a cover body 10 in which a convex portion 100 based on the shape of the RF tag 2 fixed to the adherend 3 such as metal is formed into a plate-shaped plastic sheet material, and the base of the cover body 10 is formed. The adhesive layer 11 is formed on the back surface of the flange portion 101, which is a portion where the convex portion 100 is not formed. In FIG. 1, the adhesive layer 11 is a release paper having releasability from the adhesive layer 11. 12 is protected.

  Since the RF tag 2 is housed in the RF tag fixed cover 1, it is necessary to use a material having a low dielectric constant for the cover body 10 of the RF tag fixed cover 1. A material having a low dielectric constant is used for the cover main body 10. If a material having a high dielectric constant is used for the cover main body 10, the loss of communication characteristics is greatly deteriorated due to the dielectric constant of the cover main body 10. It is because it becomes easy to occur. From this, it is preferable to use a material having a dielectric constant of 4 or less for the cover body 10 of the RF tag fixed cover 1.

  Further, since the convex portion 100 is formed on the cover main body 10 of the RF tag fixed cover 1, it is necessary to use a material with good moldability for the cover main body 10 of the RF tag fixed cover 1. In addition, if a transparent material is used for the cover body 10 of the RF tag fixing cover 1, when the RF tag 2 is fixed to the adherend 3 using the RF tag fixing cover 1, the inside of the cover body 10 The state can be confirmed visually. For example, when a transparent material is used for the cover body 10, a paper on which characters for identifying the adherend 3 to which the RF tag 2 is attached is printed between the cover body 10 and the RF tag 2 of the RF tag fixing cover 1. Can be sandwiched between.

  Considering the above, it is desirable to use PET (Poly Ethylene Terephthalate) or PS (Poly Styrene) as the material used for forming the cover body 10 of the RF tag fixed cover 1, and the thickness is 0.05 to 0. By using the above-mentioned material of 25 mm for the cover body 10 of the RF tag fixing cover 1, the RF tag 2 can be fixed to the adherend 3 using the RF tag fixing cover 1. The dielectric constant can be 4 or less. If a material thicker than the above (PET or PS) is used for the cover body 10, the communication characteristics of the RF tag 2 will be significantly deteriorated.

  The convex portion 100 of the RF tag fixing cover 1 formed based on the shape of the RF tag 2 fixed to the adherend 3 fixes the RF tag 2 to the adherend 3 using the RF tag fixing cover 1. At this time, the portion covers the RF tag 2 fixed to the adherend 3. If the size of the convex portion 100 of the RF tag fixing cover 1 and the size of the RF tag 2 are equal, it is difficult to cover the RF tag 2 with the convex portion 100 of the RF tag fixing cover 1. The RF tag fixing cover 1 has a gap of 0.5 mm to 2.0 mm between the convex part 100 of the RF tag fixing cover 1 and the RF tag 2 when the one convex part 100 is placed on the RF tag 2. The internal dimensions of the convex portion 100 may be designed.

  FIG. 2 is a diagram for explaining a method of forming the cover body 10. Although the method for forming the convex portion 100 of the cover main body 10 is arbitrary, the cover main body 10 of the RF tag fixed cover 1 can be formed by vacuum forming in the same manner as the blister pack. In vacuum forming, either a male type or a female type matching the shape of the object to be molded is used, but the convex portion 100 of the RF tag fixing cover 1 according to this embodiment is a portion for covering the RF tag 2. Therefore, since the internal dimensional accuracy is important in the convex portion 100 formed on the cover main body 10, the male shape designed based on the three-dimensional shape of the cover main body 10 is used for vacuum forming of the cover main body 10. It is preferable to use the molding die 4.

  As shown in FIG. 2, when the cover body 10 of the RF tag fixed cover 1 according to the present embodiment is vacuum-formed, the plastic sheet material 10a that becomes the base material of the cover body 10 is heated and softened to form the above-described one. After pressing against the male mold 4 (FIG. 2 (a)), the air between the plastic sheet material 10a softened by heating and the male mold 4 is sucked and heated to soften. The cover body 10 of the RF tag fixed cover 1 according to this embodiment is formed by closely attaching the plastic sheet material 10a to the male mold 4 and cutting unnecessary portions (FIG. 2 (b)). (FIG. 2C).

  An adhesive layer 11 is formed on the back surface of the flange portion 101 of the cover body 10 in the cover body 10 of the RF tag fixed cover 1 formed by vacuum forming. Further, in FIG. A release paper 12 for protecting the adhesive layer 11 is provided. In order to firmly fix the RF tag 2 to the adherend 3 using the RF tag fixing cover 1, the cover body of the RF tag fixing cover 1 has excellent weather resistance and chemical resistance and has a strong adhesive force. It is preferable to select an adhesive layer 11 that does not have a gap even if the surface of the adherend 3 to which 10 is attached has some scratches or roughness. As such an adhesive layer 11, a tape in which an acrylic adhesive is applied to both sides of a strip-like acrylic foam can be used.

  Since the adhesive layer 11 for adhering the RF tag fixing cover 1 to the adherend 3 is formed on the back surface of the flange portion 101 which becomes the base of the RF tag fixing cover 1, the adhesive layer 11 and the adherend It is necessary to design the width of the flange portion 101 of the cover body 10 in consideration of the adhesive strength with the cover 3. When a tape in which an acrylic adhesive is applied to both sides of a strip-shaped acrylic foam is used for the adhesive layer 11, the width from the flange portion 101 to the convex portion 100 is about 5 mm.

  FIG. 3 is a diagram for explaining an example of the RF tag fixing cover 1. 3A shows the RF tag 2 fixed to the adherend 3, and the RF tag 2 shown in FIG. 3A has a three-dimensional shape of a quadrangular pyramid, and the size of the upper surface of the RF tag 2 is as follows. The size of the bottom surface of the RF tag 2 is 56.0 mm × 23.0 mm, and the height of the RF tag 2 is 5.0 mm.

  FIG. 3B shows an RF tag fixing cover 1 based on the RF tag 2 shown in FIG. If the inside size of the protrusion 100 formed on the cover body 10 is the same as the size of the RF tag 2, it is difficult to cover the RF tag 2 with the protrusion 100 formed on the cover body 10. In the RF tag fixing cover 1 shown in FIG. 3B, the size of the inner upper surface of the convex portion 100 is 0.5 mm larger in length and width than the upper surface of the RF tag 2, and the size of the inner bottom surface of the convex portion 100 is RF The height of the tag 2 is 2.0 mm larger than the bottom of the tag 2. Further, in the RF tag fixing cover 1 illustrated in FIG. 3B, the RF tag excluding the release paper 12 so that the inner upper surface of the convex portion 100 of the RF tag fixing cover 1 and the upper surface of the RF tag 2 are in close contact with each other. The height of the fixing cover 1 is the thickness of the RF tag 2. In FIG. 3B, the cover body 10 has a thickness of 4.2 mm and the adhesive layer 11 has a thickness of 0.8 mm.

  FIG. 4 is a diagram illustrating a method of fixing the RF tag 2 using the RF tag fixing cover 1 of the present embodiment. When the RF tag 2 is fixed to the adherend 3 using the RF tag fixing cover 1 of this embodiment, the RF tag 2 is placed on the adherend 3 as shown in FIG. After that, the positions of the protrusions 100 formed on the RF tag fixing cover 1 in a state where the release paper 12 is peeled off and the RF tag 2 are aligned. Next, as illustrated in FIG. 4B, the convex portion 100 formed on the RF tag fixing cover 1 is covered from the top of the RF tag 2, and the upper surface of the convex portion 100 is pressed strongly to fix the RF tag fixing cover. 4 is brought into close contact with the upper surface of the RF tag 2 and then, as shown in FIG. 4C, the flange portion 101 of the RF tag fixing cover 1 is strongly pressed from above, so that FIG. As illustrated in d), the RF tag 2 is fixed to the adherend 3 using the RF tag fixing cover 1. As described above, when the RF tag 2 is fixed to the adherend 3 using the RF tag fixing cover 1 according to the present embodiment, the RF tag fixing cover 1 is firmly fixed to the adherend 3, Since the RF tag 2 is not firmly fixed to the adherend 3, even if the RF tag 2 is firmly fixed to the adherend 3 using the RF tag fixing cover 1, the RF tag fixing cover 1 is destroyed. Thus, the RF tag 2 firmly fixed to the adherend 3 can be reused. In order to prevent the position of the RF tag 2 before being fixed by the RF tag fixing cover 1 from being shifted, a weak adhesive force can be used to give the back surface of the RF tag 2 a weak adhesive force.

  FIG. 5 is a diagram for explaining a modification of the RF tag fixing cover 1. As described above, the upper surface of the convex portion 100 formed on the cover main body 10 of the RF tag fixed cover 1 of the present embodiment and the upper surface of the flange portion 101 serving as the skirt of the cover main body 10 are defined by the RF tag fixed cover 1. Since it is strongly pressed when the RF tag 2 is fixed to the adherend 3 using, it is preferable to make the structure easy to press strongly from above. For example, like the RF tag fixing cover 5 shown in FIG. 5, if the upper surface of the flange portion 501 is inclined, the area of the upper surface of the flange portion 501 can be increased, and the upper surface of the flange portion 501 can be pushed strongly with a finger. It becomes easy. Furthermore, if fine irregularities are provided on at least one of the upper surface of the convex portion 500 and the upper surface of the flange portion 501, the finger can be strongly pressed from above without slipping.

DESCRIPTION OF SYMBOLS 1 Fixed cover for RF tags 10 Cover main body 100 Convex part 101 Flange part 11 Adhesive layer 12 Release paper 2 RF tag 3 Substrate

Claims (2)

  Formed on the back surface of the cover body in which the convex portion based on the shape of the RF tag to be fixed to the adherend is formed into a plate-shaped plastic sheet material, and the flange portion where the convex portion is not formed in the cover body. A fixed cover for an RF tag, characterized in that a material having a dielectric constant, which has an adhesive layer and has a dielectric constant that does not significantly deteriorate the loss of communication characteristics, is used for the cover body. 2. The RF tag fixing according to claim 1, wherein PET (Poly Ethylene Terephthalate) or PS (Poly Styrene) is used for the cover body as a material having a dielectric constant that does not greatly deteriorate the loss of communication characteristics. cover.