JP3120371U - Manhole cover - Google Patents

Abstract

A manhole cover capable of stably reading stored information from an IC tag and writing information to the IC tag.
A manhole cover M has an IC tag 20 fixed as an information storage medium on the surface of the lid 1, and the lid 1 has a recess 10 for accommodating the IC tag 20 and an outer peripheral wall around which the recess is wound. A circumferential wall portion 13 is provided as a portion, and at least one notch portion 14 is formed in the circumferential wall portion 13 in the vertical direction. The IC tag 20 has a disk shape, and the outer peripheral wall portion is a circumferential wall portion 13 that winds around the outer periphery of the IC tag, and it is preferable that notches 14, 14,... Are formed at a plurality of locations on the circumferential wall portion. .
[Selection] Figure 6

Description

  The present invention relates to a manhole cover that closes the opening of a manhole communicating with a sewer pipe or the like buried underground in a road or the like, and in particular, a manhole cover that is provided with an information storage medium storing information about the pipe and the like. About.

Conventionally, there is a technique described in Patent Document 1 as a manhole cover to which an RFID (Radio Frequency Identification) tag storing sewer information, manhole position, maintenance history information, and the like is attached. This technique includes a cylindrical antenna coil and a control unit, and the antenna coil and the control unit are sealed by an elongated sealing body made of a nonmagnetic material, and the sealing body is further formed. An RFID tag covered with a metal cylinder having an outer peripheral surface open at both ends and a gap in the longitudinal direction is attached to a groove provided on the surface of a metal manhole cover.
JP 2002-232321 A

  By the way, in the RFID tag having the above structure and the manhole cover to which the tag is attached, the RFID tag is provided with an antenna coil and a control unit, and sewer information stored in the tag using an electromagnetic wave by a read / write terminal. However, the electromagnetic wave is not stable between the read / write terminal and the RFID tag, and there is a risk that an error may occur in reading or writing information to be transmitted / received. .

  The present invention has been made in view of such a problem, and an object of the present invention is to stably transmit and receive electromagnetic waves between an information storage medium installed on a manhole cover and a read / write terminal. An object of the present invention is to provide a manhole cover that can stably read stored information and write information.

  In order to achieve the above object, a manhole cover according to the present invention is a manhole cover in which an information storage medium is fixed to the surface of the cover body, and the cover body has a recess for accommodating the information storage medium, and the recess is wound around the manhole cover. An outer peripheral wall portion is provided, and at least one notch portion is formed in the outer peripheral wall portion in the vertical direction. As an information storage medium, an IC chip, an RFID tag, or the like is used.

  The manhole cover of the present invention configured as described above has an information storage medium such as an IC chip, an IC tag, and an RFID tag accommodated and fixed in a recess of the cover, and a notch is formed in the outer peripheral wall around which the recess is wound. Therefore, it is possible to read stored information and transmit / receive electromagnetic waves for writing information through the space between the outer peripheral wall portion that winds the notched portion and the recessed portion and an information storage medium such as an IC tag. In addition to being able to write, the stored information can be read stably. In addition, information stored using a device such as a mobile phone can be read, and by downloading related information from a dedicated server, it can be used for various purposes.

  Moreover, as a preferable specific aspect of the manhole cover according to the present invention, the information storage medium is a disc shape, and the outer peripheral wall portion is a circumferential wall portion wound around the outer periphery of the disc-shaped information storage medium, The notch is formed at a plurality of locations on the circumferential wall. The manhole cover configured in this way can easily accommodate the disk-shaped information storage medium in the concave portion formed by the circumferential wall portion, and can be easily fixed, through the notches formed at a plurality of locations on the circumferential wall portion. Electromagnetic waves for writing information and reading information can be reliably transmitted and received.

  Furthermore, in the manhole cover according to the present invention, it is preferable that the information storage medium is fixed to the concave portion of the cover body with an elastic adhesive. In the manhole cover configured in this manner, since the information storage medium is fixed to the concave portion of the cover body by an adhesive having elasticity such as silicone resin, it is possible to alleviate the impact from the outside. Damage and breakage can be prevented.

  In the manhole cover of the present invention, the information storage medium is housed and fixed in the concave portion of the lid body, and is recessed from the same surface as the outer peripheral wall portion or slightly from the outer peripheral wall portion. It is preferable not to protrude more. That is, the height of the outer peripheral wall that winds the recess that accommodates the information storage medium is equal to the height of the information storage medium, or the height of the outer peripheral wall is set higher than the height of the information storage medium. preferable. By setting the outer peripheral wall in this way, even if an external impact is applied, the outer peripheral wall receives an impact and a large impact is not directly applied to the information storage medium, thus preventing the information storage medium from being damaged or damaged. Can do.

  The manhole cover according to the present invention has an information storage medium such as an IC tag or an RFID tag fixed on the surface thereof, and can be used for reading stored information from such information storage medium and for accessing information such as writing information. It can be done reliably. Further, it is possible to prevent breakage or damage of the information storage medium accommodated and fixed in the recess.

  Hereinafter, an embodiment of a manhole cover according to the present invention will be described in detail with reference to the drawings. 1 is a front view of a manhole cover according to the present embodiment, FIG. 2 is a rear view of FIG. 1, FIG. 3 is a cross-sectional view taken along line AA in FIG. 1, and FIG. FIG. 5 shows an IC tag, (a) is an exploded perspective view of the protective case and the tag body, and (b) is (a). FIG. 6 is a cross-sectional view of a state in which the IC tag is housed and fixed in the recess of the lid, and the IC tag of FIG. 5 is fixed upside down.

  1-5, the manhole cover M is formed in a disc shape with the cover body 1 made of cast iron, and the diameter thereof is set in accordance with the inner diameter of the manhole to be mounted. On the surface of the manhole cover M, a non-slip uneven pattern not shown is formed. Although not shown in the central part 2 of the manhole cover M, for example, when a display of a municipality or a display such as a sewer or a common groove is formed at the time of casting, it is shown in the annular part 3 except for the outer ring part. No anti-slip uneven pattern is formed. On the back surface of the lid body 1, thick outer peripheral ribs 4 protrude from the outer periphery, and reinforcing ribs 5, 5, 6, 6 protrude from the outer peripheral ribs in vertical and horizontal directions. In this embodiment, two vertical reinforcing ribs 5 and 5 and two horizontal reinforcing ribs 6 and 6 are formed. The outer peripheral rib 4 is formed with a bolt mounting portion 4a for fixing the manhole cover M.

  Four concave portions 10 are formed on the surface of the lid 1 so as to correspond to the intersecting portions of the two vertical and two horizontal reinforcing ribs. The four recesses accommodate the IC tag 20 as an information storage medium. In the present embodiment, the IC tag 20 has a disk shape as shown in FIG. 5, and the IC tag has a diameter D1 and a height H1. The diameter D1 is about 30 to 35 mm, and the height H1 is set to about 4 to 8 mm. In the IC tag 20, a tag body 25 is accommodated in a protective case 21 made of plastic such as polycarbonate resin, and the protective case is formed of a case 22 and a lid 23. The tag main body 25 housed in a sealed state in the protective case 21 of the IC tag 20 includes a storage unit that stores information, an antenna coil that transmits and receives information using electromagnetic waves, and the like. The protective case 21 that accommodates the tag body 25 is preferably made of a resin having good weather resistance, strong impact resistance, an insulator, and a small dielectric loss tangent.

  In the circular recess 10 formed so as to accommodate the IC tag 20 as described above, the diameter D2 of the opening is set larger than the diameter D1 of the IC tag 20 as shown in FIG. Further, the depth H2 (FIG. 4b) of the recess 10 is formed to be equal to or slightly deeper than the height of the IC tag 20. The bottom surface of the recess is formed on a flat surface 11 having the same diameter D1 as that of the bottom surface of the IC tag 10, and an inclined surface 12 of 45 degrees that inclines upward (surface side) from the flat surface 11 having the diameter D1 to the diameter D2. Is formed. The number of the recesses 10 for accommodating the IC tags 20 may be only one. However, when a plurality of IC tags are installed so as to separate information and the like, the interval S between the recesses is preferably set to be 100 mm or more apart. In the present embodiment, four recesses are formed.

  A circumferential wall portion 13 is formed on the outer periphery of the recessed portion 10 as an outer peripheral wall portion, and a recessed portion for accommodating the IC tag 20 is formed by the circumferential wall portion. The circumferential wall portion 13 is formed to have a width W of about 5 mm, and separates the annular portion 3 where the anti-slip pattern is formed and the concave portion 10. The height (the depth H2 of the recess) of the circumferential wall 13 is set so that when the disc-shaped IC tag 20 is accommodated, the IC tag does not protrude from the surface. That is, when the information storage medium such as the IC tag 20 is accommodated and fixed in the recess 10, the height of the circumferential wall portion 13 is set so that the IC tag does not protrude from the surface of the manhole cover M or is slightly recessed. The IC tag is formed so that external impact is not directly applied to the IC tag, thereby preventing the IC tag from being damaged.

  Four cutout portions 14, 14... Are formed on the circumferential circumferential wall portion 13 at intervals of 90 degrees. The depth H3 of the notch 14 is set to about the height of the IC tag 20 or about half the height, but is preferably formed to a depth of more than half the height. In this embodiment, the height of one notch 14 is set to about 4 to 5 mm, and the width is set to about 10 mm. Although the number of notches 14 is not limited to four, it is preferable that a plurality of notches 14 be formed at equal intervals. Since the plurality of notches 14 are formed in the circumferential wall portion 13 of the recess 10 that accommodates the IC tag 20 in this way, the accommodated IC tag 20 is configured such that the side surface is exposed from the circumferential wall portion 13. Has been. In addition, if the depth of the notch 14 is deep enough to expose the antenna coil inside the IC tag 20, electromagnetic waves for writing and reading information can be stably transmitted and received. There is no problem. In addition, the circumferential wall part 13 and the notch part 14 which wind the recessed part 10 shown in FIG. 4 are the display in the center part 2, and the uneven | corrugated pattern of the non-slip | slip of the annular part 3 when the cover body 1 is formed with casting. Are formed at the same time.

  When the IC tag 20 is accommodated in the concave portion 10 of the manhole cover M of the present embodiment configured as described above, it is preferable to fix it using an adhesive having elasticity. When an adhesive is applied to the flat surface 11 of the recess 10 and the IC tag 20 is accommodated in the recess 10 of the lid 1 as shown in FIG. 6, the bottom surface of the IC tag 20 is guided by the inclined surface 12 on the bottom surface of the recess. The IC tag 20 is fixed in the recess 10 with the bottom face being in close contact with the flat surface 11 at the center.

  With this configuration, a uniform gap d is formed over the entire circumference along the circumferential wall portion 13 between the diameter D2 of the recess 10 and the diameter D1 of the IC tag 20, and an elastic material such as a silicone sealant is formed in the gap portion. You may inject | pour the caulking agent 15 which has these as an adhesive agent. As a result, an elastic layer having a uniform thickness is formed on the outer peripheral surface of the IC tag 20 with the elastic caulking agent 15 to prevent a large impact from being directly applied to the IC tag. Further, the outer periphery of the IC tag 20 is surrounded by an insulating layer made of a caulking agent so that information can be read and written stably, and the gap d is preferably about 2 to 3 mm. Since the IC tag 20 is surrounded by the circumferential wall portion 13 excluding the cutout portion 14, the fixed state is stabilized.

  In this way, the IC tag 20 accommodated in the concave portion 10 of the lid body 1 and bonded and fixed with the caulking material 15 is surrounded by the circumferential wall portion 13. Since the notch portion 14 is formed, the side surface of the IC tag 20 is exposed from the circumferential wall portion 13 made of cast iron. As a result, the surface of the IC tag 20 fixed to the lid 1 is exposed, and the side surface is exposed by the notch 14, and the electromagnetic wave E transmitted and received with the IC tag is blocked by the metal wall 13. Thus, reading of information stored in the IC tag 20 and writing of information to the IC tag 20 can be reliably performed. Further, the IC tag 20 is fixed by an elastic adhesive, and can be easily removed by cutting with a blade or the like into the caulking agent 15 uniformly injected into the outer periphery of the IC tag. Easy to do.

  The IC tag 20 accommodated and fixed in the recess 10 of the lid 1 has a protective case 21 protected by the circumferential wall portion 13, and a caulking material having elasticity between the circumferential wall portion 13 and the IC tag 20. 15 is injected and fixed, and the height of the wall 13 is set so that the IC tag 20 does not protrude upward from the circumferential wall 13. Even if the tire or the footwear of the pedestrian comes into contact, it can be prevented from being subjected to a large impact by being relaxed by the elastic adhesive, and the IC tag 20 can be prevented from being damaged or broken.

  As described above, the manhole cover M to which the IC tag 20 is fixed as an information storage medium can utilize, for example, a reference position coordinate as a management of a road buried object at the time of a disaster. In addition, an IC tag reader or RFID tag reader can be attached to a mobile phone or PDA, and stored information can be easily confirmed. Furthermore, since the detailed spatial data can be acquired by accessing the dedicated site with the mobile phone from the read data, the repair and maintenance history can be easily confirmed.

  Although one embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention described in the claims. Design changes can be made. For example, although an example of a cast iron lid was shown as a lid constituting a manhole lid, it was composed of a metal casting other than cast iron, a lid in which concrete was poured into the central portion or annular portion of the metal casting, etc. May be. Although the shape of the reinforcing rib is two vertical and horizontal reinforcing ribs, an appropriate shape such as a ring shape or a radial shape can be used.

  Although an example of the disk-shaped IC tag 20 has been shown as the information storage medium, the shape is not limited to the disk shape, and can be formed in an appropriate shape such as a flat plate shape, a cylindrical shape, a rectangular parallelepiped shape, or the like. And it is preferable to set the shape of the recessed part 10 which accommodates an information storage medium according to the shape of an information storage medium. In addition, when fixing a plurality of IC tags to one manhole cover, it is preferable to distinguish them by color so that they can be managed easily.

  Moreover, although the example which accommodates the tag main body 25 in the protective case 21 which consists of resin case 22 and the lid | cover 23 was shown, an IC tag may be comprised by embedding a tag main body in resin and insert molding. Further, the tag main body may be housed in a metal protective case, the metal part of the electromagnetic wave transmission / reception part may be removed, and electromagnetic waves may be transmitted / received from that part.

  As an application example of the present invention, in addition to a manhole for managing sewers, the present invention can be applied to a manhole cover for managing underground wiring facilities and common grooves.

The front view of one Embodiment of the manhole cover which concerns on this invention. The rear view of FIG. AA sectional view taken on the line AA of FIG. (A) is the perspective view of the state which expanded the B section of Drawing 1 partially, (b) is a CC line expanded sectional view of (a). The IC tag is shown, (a) is a perspective view of the state where the protective case and the tag main body are disassembled, (b) is a sectional view of the state (a) assembled. Sectional drawing of the state which accommodated and fixed the IC tag in the recessed part of the cover body.

Explanation of symbols

  1: cover body, 10: recessed portion, 11: flat surface, 12: inclined surface, 13: circumferential wall portion (outer peripheral wall portion), 14: notched portion, 15: caulking agent (adhesive), 20: IC tag ( Information storage medium), 25: tag body, M: manhole cover, D1: IC tag diameter, D2: recess diameter, H1: IC tag height, H2: recess depth, H3: notch depth The

Claims (4)

A manhole cover with an information storage medium fixed on the surface of the cover,
The lid includes a recess for accommodating the information storage medium, and an outer peripheral wall around which the recess is wound, and the outer peripheral wall is formed with at least one notch in the vertical direction. Manhole cover, characterized by   The information storage medium has a disc shape, the outer peripheral wall portion is a circumferential wall portion wound around the outer periphery of the disc-shaped information storage medium, and the notch portions are formed at a plurality of locations on the circumferential wall portion. The manhole cover according to claim 1.   The manhole cover according to claim 1, wherein the information storage medium is fixed to the concave portion with an elastic adhesive.   The said information storage medium is dented from the same surface as the surface of the said outer peripheral wall part, or the surface of the said outer peripheral wall part in the state accommodated and fixed to the recessed part of the said cover body. A manhole cover according to any one of the above.

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