JPH09125433A - Manhole cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately perform the works in various manholes, by embedding a storage element in which at least one of the positional information of a manhole, information of the installation date or the superintending department of the manhole, information of the cable circuit in the manhole, and information of the maintenance is written in the inside of the nearby position of the surface of the cover body. SOLUTION: A small diameter hole 3 for embedding an element is provided in advance at an appropriate position of the periphery deviated from the center in a cover body 1, in the production process of the manhole and it is cast. A storage element 2 is inserted in the small diameter hole 3 and the hole is coated with a cover 4. Or a small hole 3 is bored at a specified position of an existing manhole cover by a drill and the storage element 2 is inserted in the hole 3 and fixed therein and then coated with the cover 4. Information such as manhole position, installed date, kind of cable circuit within the manhole, maintenance, when necessary, is written in the storage element 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a manhole cover having a function of storing required information and retrieving it arbitrarily. In addition,
The manhole cover which is the object of the present invention directly means a cover which covers a manhole which is a vertical hole for workers to enter in the ground or underpass, but the present invention does not allow workers to enter a so-called handhole. The manhole cover in the present invention also includes a handhole cover because it can be applied to a cover to cover.

[0002]

BACKGROUND OF THE INVENTION Generally, a manhole cover is made of cast iron having a circular or rectangular shape and having a large weight and thickness, and is used by being fitted in a "manhole cover receiving frame" above a manhole buried underground. Such manhole covers are installed everywhere, regardless of the city or region, and in areas where the installation density is high, it is necessary to accurately identify the manhole cover when it is necessary to open it for construction or other reasons. Is not that easy. In addition, it is often difficult to know in advance the depth inside the manhole and precautions when workers enter. Furthermore, in some areas, it may be difficult to visually confirm the location of the manhole due to snow cover and fallen leaf cover.

On the other hand, the manhole normally needs to have the lid completely closed, and if the lid can be easily opened, it may cause inconvenience in some cases. Therefore, the keyhole is sealed. There are quite a few cases in which it is blocked so that it cannot be opened easily. However, if you accidentally open the sealed lid, it is required to re-seal it and return it to its original state, which is troublesome.Therefore, specifying the desired manhole lid is definitely a task. is important.

Conventionally, it is difficult to accurately grasp the position of the manhole lid and its information in advance, and therefore the above-mentioned various problems actually occur, and countermeasures for them are required. Was there. However, in the past, there have been few useful suggestions for solving such problems.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and its primary purpose is to easily and surely specify the required manhole cover position. For the purpose of, the manhole cover which has not been considered at all for the purpose is utilized as an information medium, and can be easily applied to a new or existing manhole cover, and various information can be taken out from this manhole cover.

[0006]

The manhole cover according to the present invention for achieving such an object is provided with information about the manhole itself, the installation date of the manhole, the administration department, etc., inside the cover body near the surface thereof. Information, the cable line information in the manhole, and the maintenance information, at least one of which is embedded in the memory element.

Further, the storage element can be selected from a read-only type, a read / write type, and a satellite communication type. When the memory element is actually embedded in the lid body, holes may be provided at appropriate positions on the surface of the lid body, and the memory element may be inserted into the hole and covered with a cover.

When the manhole cover of the present invention is used,
When it is necessary to open the lid of the manhole due to construction work, etc., the position information etc. stored in the storage element can be read by a sensor etc. to identify the manhole lid without misidentification, and in some cases inside the manhole. The information of can be recognized before opening the lid. Moreover, even if the manhole cover is hidden by snow or fallen leaves, it is possible to detect it from above the deposit without contact. Furthermore, by making a database of the information stored in the storage element of the manhole cover, it is possible to centrally manage manholes distributed over a wide area at one place.

The storage element is a communication type element (G
In the case of PS), searching for a manhole cover covered with sediment is easier and more accurate. Further, in this case, on the contrary, since the opening situation of the manhole cover can be detected, it is possible to monitor the condition of the manhole cover at a remote place.
In addition, the accurate position information (longitude, latitude, altitude, etc.) of the manhole installed on the roadway is stored in the element embedded in the manhole cover, and is loaded on the car passing through the manhole. By providing the navigation system with a function of reading the positional information stored in these elements, a secondary effect that the position recognition of the navigation system can be corrected can be expected.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. Although what is shown in the drawings is a normal disc-shaped cast iron manhole cover, the present invention is not particularly limited to this.

The manhole cover shown in FIG. 1 is an example in which the memory element 2 is embedded at an appropriate position on the periphery of the cover body 1 off the center. In order to embed the memory element 2, a small-diameter hole 3 for embedding the element is provided in advance in the manhole manufacturing process, casting is performed, and the memory element 2 is inserted into this hole 3 and covered with an arbitrary cover 4. Alternatively, a small hole 3 may be formed at a predetermined position of the existing manhole cover by a cutting device, the memory element 2 may be inserted into the hole 3 and fixed, and then covered with an arbitrary cover 4. The storage element considers the ease of detection,
It is preferable to fix the cover body as close as possible to the surface with a stopper or an adhesive agent, and as the cover to be covered, a resin or pottery which is made of a material that does not interfere with the detection function and which has strength can be used.

In FIG. 2, the area in which the company emblem or the like is engraved at the center of the lid main body 1 is ground to a certain depth, or a void is formed in advance at the time of manufacture, and the storage element 2 is appropriately placed therein. It is set and the entire grinding portion is covered with a cover 2A.
In this example, a storage space for storage elements can be secured in a wider range than that of FIG. 1, and an element having a larger memory capacity can be inserted. Similarly, FIG. 3 shows an example in which a small-diameter hole is formed in the center of the lid body 1 in the same manner, the memory element 2 is inserted into the hole, and the cover 4 is covered with the hole. The present invention is not limited to the illustrated example, and the storage element can be set at any other position of the lid main body, but in consideration of the fact that the reading can be performed easily and surely, the storage element can be used in any case. It is also important to bury the manhole cover near the surface.

The memory element stores position information of the manhole, installation date, administration department, and if necessary, the type of cable line inside the manhole, maintenance information, etc., read-only read-only type, rewritable Read / write type or GPS capable of communicating with satellites
Specification type is possible. The memory element may be a type that uses a battery, but a semiconductor element of a type that operates by a radio wave transmitted from the reading side and does not require a power source on the element side is most preferable. At present, many such semiconductor elements are known. For example, as the one used in the present invention, an IC chip having a predetermined memory capacity is formed into a disc shape, a coin shape, a button shape made of a synthetic resin, It is formed by embedding it in various shapes and sizes of a cylindrical shape, a block shape or a card shape, but in the present invention, a small diameter disk shape, a cylindrical shape, and a button shape are practical.
Which memory element is used may be appropriately determined in consideration of the amount of information to be stored, the size and installation location of the manhole cover, the element storage space, the cost, and the like.

FIG. 4 shows a specific example of an actual information reading operation using the manhole cover according to the present invention. In the figure,
Reference numeral 5 is a sensor (antenna) for catching a weak electromagnetic wave from the storage element, 6 is a read unit or a read / write unit for reading the input electromagnetic wave from the storage element and converting it into an electric signal, and 7 is a unit 6
It is a computer that inputs signals from and displays information from the manhole cover. If a sensor with high accuracy is used, the operating distance (distance to the manhole cover) can be extended.

[0015]

EXAMPLE The present invention was applied to an actual manhole cover, and manhole search was performed under the following test conditions. [Test conditions] -Manhole lid: made of existing cast iron with a diameter of 770 mm and a thickness of 54 mm-Memory element embedding hole: diameter of 25 mm, depth of 20 mm-Memory element: read / write type in which a cylindrical element is resin-molded into a disk shape・ Memory element fixing method: Fix with epoxy adhesive ・ Information stored in memory element: manhole number, longitude and latitude of installation location, owned company name and management department signature, cable type and connection point status in manhole, use of duct Memorize the plans etc. by coding.

When the manipulator made the manipulator close to the manhole and read the manipulating antenna by bringing it close to the manhole, the position information could be accurately obtained. Further, as a result of searching with an antenna in the same manner by putting soil on the upper surface of the manhole cover appropriately to make it invisible, it was possible to search for the manhole cover easily and in a short time.

[0017]

As described above, according to the manhole cover of the present invention, the information stored in the storage element can be easily confirmed on the spot, and the manhole can be quickly specified without error. , It is possible to accurately perform the work in various manholes. Moreover, even if the manhole cover is hidden by dirt, snow, or the like, it is possible to easily search for it without contact. Furthermore, if a semiconductor memory that operates without a battery and has excellent durability is used as a storage element, it can be used for a long time once embedded and has a great cost advantage.

[Brief description of the drawings]

FIG. 1A is a perspective view showing an embodiment of a manhole cover of the present invention, and FIG. 1B is a sectional view of a portion in which a memory element is embedded.

FIG. 2 is a perspective view showing another embodiment of the manhole cover of the present invention.

FIG. 3 is a perspective view showing still another embodiment of the manhole cover of the present invention.

FIG. 4 is an explanatory view showing a situation of actual information reading using the manhole cover of the present invention.

[Explanation of symbols]

 1 Manhole Cover 2 Storage Element 3 Element Storage Hole 4 Cover 5 Sensor 6 Lead Unit 7 Computer

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshikazu Ishii 3-9 of 11 Midoricho, Musashino-shi, Tokyo 11-9 Nippon Telegraph and Telephone Corporation Border Region Research Institute (72) Naofumi Suzuki 3-9 of Midori-cho, Musashino-shi, Tokyo 11 Nippon Telegraph and Telephone Corporation Border Area Research Institute (72) Inventor Haruo Hoshizaki 1-2-1 Otemachi, Chiyoda-ku, Tokyo Mitsui & Co., Ltd. Information & Communication Division (72) Inventor Yen Osawa Otemachi, Chiyoda-ku, Tokyo 1-2 1 Mitsui & Co., Ltd. Information & Communication Division (72) Inventor Tadakatsu Maruyama 2/3 13 M & C Building 4F Awaji Sangyo Co., Ltd. Tokyo Branch (72) Inventor Niwa Kazuo, 13-3 M & C Building 4F, 2-3 Kandaogawamachi, Chiyoda-ku, Tokyo Awaji Sangyo Co., Ltd. Tokyo Branch

Claims (2)

[Claims] 1. A memory in which at least one of position information of the manhole, information such as the installation date and administration department of the manhole, cable line information in the manhole, and maintenance information is written inside the lid body near the surface as appropriate. A manhole cover characterized by having embedded elements. 2. The manhole cover according to claim 1, wherein the storage element is one of a read-only type, a read / write type, and a communication type with a satellite.