JP5152988B2 - Cover for underground structure - Google Patents

Description

  The present invention relates to a lid for an underground structure provided with a lid body and a receiving frame that supports the lid body so as to be openable and closable, and in particular, an information storage capable of wirelessly reading and writing position information and maintenance information, etc. The present invention relates to a lid for an underground structure in which a medium is arranged.

  In addition, the term “underground structure lid” as used in the present specification means a manhole cover, a large iron cover, a sewage culm lid, an electric power / Openable and closable joint gutter lids, power transmission iron lids, power distribution iron lids, buried underground pipes in waterworks and gas pipes, and their associated equipment to protect underground facilities equipment and underground cables in communications A fire hydrant lid, a water control valve lid, a gate valve lid, an air valve lid, a gas pipe lid, a water meter lid, etc., that function as an open / close door.

  In the lid for underground structures, it is desired that various information such as position information and maintenance information can be quickly grasped. As a means for that purpose, Patent Document 1 discloses that the lid or the vicinity thereof is wireless. An underground underground piping facility is disclosed in which a response tag is embedded and various information can be obtained without opening a lid or using a ledger.

In addition, as a technique for installing an information storage medium capable of reading and writing position information, maintenance information, and the like wirelessly such as a wireless response tag in the lid body, Patent Document 2 provides a technique in the vicinity of the surface of the lid body. It is disclosed that a semiconductor memory element that does not require a power supply is inserted into a small-diameter hole or space and covered with a cover.
JP-A-4-19485 JP-A-9-125433

  However, the lid body of the underground structure lid is generally made of cast iron, and when an information storage medium capable of wirelessly reading and writing position information, maintenance information, etc. is installed on the cast iron lid body, In some cases, the electromagnetic waves responsible for communication between the information storage medium and the device for reading and writing are disturbed, and stable communication cannot be performed. Also, in order to communicate stably, a synthetic resin that provides a large hole (space) with a space from the lid body made of cast iron, installs an information storage medium there, and allows electromagnetic waves to pass through the periphery or top surface It was necessary to cover with etc.

  Therefore, the problem to be solved by the present invention is that, when an information storage medium that can read and write position information and maintenance information wirelessly is installed on the lid body, electromagnetic waves for communicating with the information storage medium are used. An object of the present invention is to provide a lid for an underground structure that is less likely to be disturbed and can perform stable communication.

The present invention relates to a lid for an underground structure including a lid body and a receiving frame that supports the lid body so as to be openable and closable, and the lid body has an edge around the periphery, and a portion surrounded by the edge is provided. It has a cast iron frame as a recess and a resin base plate that can be mounted in the recess of the frame, and wirelessly reads information such as position information and maintenance information in a recess provided on the back surface of the base plate. The writable information storage medium is placed on the upper surface of a fixing member made of a non-magnetic material such as a resin fitted on the bottom surface side of the recess, and the bottom surface of the recess is covered with the frame. characterized in that was.

Thus, the information storage medium by placing in a recess provided on the back surface of the resin base Supureto electromagnetic waves to communicate with the information storage medium is not disturbed influenced by the lid body, stable Can communicate. Moreover, since the opening part by the side of the bottom face of a recessed part is block | closed by inserting a fixing member, the water immersion into a recessed part is prevented and stable communication can be maintained. Further, the size of the concave portion may be a minimum necessary size for arranging the information storage medium, and space can be saved.

Further, the information storage medium, Runode be disposed within the at placed state on the top surface recess of the fixing member, thereby, by adjusting the fitting depth of the thickness and the concave portion fixing member, the recess The height of the information storage medium can be adjusted as appropriate.

Moreover, it is preferable that the fixing member has elasticity. Thereby, it is possible to protect the information storage medium from an impact during transportation and an impact generated when the vehicle passes after installation. Furthermore, it is preferable to provide an information storage medium position display mark on the surface of the base plate at a position corresponding to the position where the information storage medium is arranged. Thereby, the arrangement position of the information storage medium is known from the surface side of the base plate.

  According to the present invention, when an information storage medium capable of reading and writing position information and maintenance information wirelessly is installed in the lid body, the electromagnetic waves for communicating with the information storage medium are less likely to be disturbed and stable. Communication can be performed.

  Embodiments of the present invention will be described below based on examples shown in the drawings.

  1A and 1B show an embodiment of a lid for an underground structure according to the present invention, in which FIG. 1A is a plan view and FIG. 1B is a cross-sectional view taken along line AA in FIG.

  The underground structure lid 100 shown in FIG. 1 is a gate valve lid, and includes a lid body 200 and a receiving frame 400 that supports the lid body 200 via a hinge mechanism 300 so as to be opened and closed.

FIG. 2 is an exploded perspective view showing the configuration of the lid body 200. The lid body 200 has an edge 211 around it, and a frame 210 made of cast iron formed in a substantially tray shape with a portion surrounded by the edge 211 as a recess 212, and attached to the recess 212 of the frame 210. A base plate 220 made of resin, and the base plate 220 is fitted in the recess 212 of the frame 210 and is detachably fixed.

  The base plate 220 is made of a thermoplastic resin such as polycarbonate having wear resistance, impact resistance and compressive strength, and is formed by injection molding or the like, and a plurality of convex portions 221 are provided on the surface thereof as slip prevention and design. It has been. Various information display plates 230 for displaying information such as the types of valve plugs, the diameter, the type of fluid, the flow direction, and the management number are attached to the surface of the base plate 220 as an information transmission medium. Furthermore, an IC tag 240 that can read and write position information, maintenance information, and the like wirelessly is attached to the back surface of the base plate 220 as an information storage medium.

  Specifically, the IC tag 240 is inserted into a recess 222 formed by a circular rib on the back surface of the base plate 220 shown in FIG. 3, and a fixing member 250 made of an elastic resin foam shown in FIG. By fitting, as shown in FIG. 4, it is placed at a predetermined height position in the recess 222 while being placed on the upper surface of the fixing member 250. Then, an IC tag position display mark 223 shown in FIG. 2 is provided on the surface of the base plate 220 at a position corresponding to the mounting position of the IC tag 240 so that the mounting position of the IC tag 240 can be seen from the surface side of the base plate 220. ing.

  In the embodiment, an electromagnetic induction passive tag having a communication distance of several tens of cm and a communication frequency of 13.56 MHz was used as the IC tag 240. However, in the present invention, the information storage medium is not limited to the IC tag, and any information storage medium may be used as long as it can read and write information such as position information and maintenance information wirelessly. In any case, the material of the fixing member 250 is preferably a nonmagnetic material such as a resin from the viewpoint of preventing disturbance of electromagnetic waves.

  FIG. 5 is an enlarged cross-sectional view of the main part of the lid main body 200 taken along the line B-B in FIG. As shown in the figure, on the outer periphery of the base plate 220, a quadrant circular projection 224 having a diameter slightly larger than the inner diameter of the edge 211 of the frame 210 is formed over the entire circumference. The base plate 220 is securely fitted to and integrated with the frame 210 by reliably contacting the inner peripheral surface of the edge 211 of the frame 210. Further, in order to make the integration of the base plate 220 and the frame 210 more reliable, a tapping screw 260 is attached from the back side of the frame 210 so that the base plate 220 and the frame 210 are fastened. If the tapping screw 260 is removed, the base plate 220 can be removed from the frame 210, and only the base plate 220 can be replaced.

  Here, the vertical cross-sectional shape of the protrusion 224 is a curved surface such as a quadrant or semicircle so that when the base plate 220 is pushed in, the base plate 220 is smoothly fitted while being in contact with the inner peripheral surface of the edge 211. It is preferable to make it into a shape. In addition, the position where the protrusion 224 is provided is preferably the upper side of the outer peripheral surface of the base plate 220 in order to prevent the inflow of rainwater and earth and sand.

  As described above, in the present invention, since the information storage medium (IC tag 240) is disposed in the recess provided in the resin base plate 220, electromagnetic waves for communicating with the information storage medium are affected by the lid body. There is no disturbance and communication can be performed stably.

In the embodiment, the present invention is applied to the gate valve cover, but it can also be applied to other underground structure covers such as a manhole cover and a fire hydrant cover.

One Example of the lid | cover for underground structures of this invention is shown, (a) is a top view, (b) is AA sectional drawing of (a). It is a disassembled perspective view which shows the structure of the cover main body of the cover for underground structures shown in FIG. It is a reverse view of the baseplate which comprises the cover main body of the cover for underground structures shown in FIG. It is sectional drawing of the principal part which shows the mounting state of an IC tag. It is an expanded sectional view of the principal part of the lid body by the BB section of Drawing 1 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Cover for underground structures 200 Cover body 210 Frame 211 Edge 212 Depressed part 220 Base plate 221 Convex part 222 Concave part 223 IC tag position display mark 224 Protrusion part 230 Information display plate 240 IC tag 250 Fixing member 260 Tapping screw 300 Hinge mechanism 400 Slot

Claims (3)

In a lid for an underground structure including a lid body and a receiving frame that supports the lid body so as to be openable and closable,
The lid body has an edge around the periphery, and includes a cast iron frame having a recess surrounded by the edge, and a resin base plate that can be attached to the recess of the frame,
An information storage medium capable of wirelessly reading and writing information such as position information and maintenance information is fixed in a recess provided on the back surface of the base plate, and is made of a nonmagnetic material such as a resin fitted on the bottom surface side of the recess. Arranged in a state of being placed on the upper surface of the member,
A lid for an underground structure, wherein a bottom surface of the recess is covered with the frame . The lid for an underground structure according to claim 1, wherein the fixing member has elasticity . The cover for an underground structure according to claim 1 or 2, wherein an information storage medium position display mark is provided on a surface of the base plate at a position corresponding to an arrangement position of the information storage medium.

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