JPH0665677U - Buried display tape - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an embedded display tape that enables accurate detection of existing embedded objects including non-magnetic materials. [Structure] In a buried display tape 11 buried in the ground and used for detecting an existing buried object, a display tape body 12a is provided.
And an electric wire 12b arranged in the longitudinal direction thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a buried indicator material for underground lifelines such as electric power, communication, gas, water, and sewage.

[0002]

[Prior art]

 When installing a high-voltage or extra-high-voltage underground power line by a pipe system or a direct burial system, avoid unexpected situations where the pickaxe or the blade of the excavator is accidentally driven into the existing buried object due to excavation work. For this reason, it is necessary to take measures to alert the drilling operator that the existing buried objects are buried. As a measure, a method of displaying on the body tightening part of the buried pipeline, a method of burying the buried indicating tape 1 on which markings are printed as shown in FIG. There are methods, such as a method of placing a pillar including a position mark in the vicinity. As an embedding display tape, there is one in which metal powder is attached as a marker to confirm the embedding position with a magnetic detector (see Japanese Utility Model Laid-Open No. 63-157586).

[0003]

[Problems to be solved by the device]

 However, the above method has a problem that it is difficult to accurately grasp the position of the existing buried object. For example, an embedded display tape to which metal powder is attached has weak magnetism, and has a low sensitivity for detecting an embedded position, making it difficult to accurately detect an embedded object. When the buried object is a wire or cable, it can be detected relatively easily by energizing them to generate a large magnetic field, but when the buried object is a non-magnetic material such as a plastic pipe. Even if you try to detect it, you cannot detect it.

[0004]

[Means and actions for solving the problem]

 The present invention provides an embedded display tape that solves the above problems. In an embedded display tape that is embedded in the ground and used to detect an existing buried object, the embedded display tape is disposed in the longitudinal direction of the main body of the display tape. It is characterized by consisting of an electric wire. As described above, when the embedded display tape is composed of the display tape body and the electric wires arranged in the longitudinal direction thereof, it is possible to pass a current through this electric wire and generate a magnetic field of sufficient strength. By detecting, it is possible to accurately detect the position of the buried display tape, and thus the existing buried object. In this case, even if the existing buried object is a non-magnetic material such as a plastic pipe or a concrete pipe, it can be detected.

[0005]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a sectional view of an embodiment of an embedded display tape according to the present invention. The embedded display tape 11 is composed of a display tape body 12a made of a plastic material such as polyvinyl chloride or polyethylene, and an electric wire 12b embedded in the display tape body 12a along the longitudinal direction. As shown in FIGS. 2 and 3, for example, the embedding display tape 11 is installed along the electric conduit 13 in the backfill soil 14 above the electric conduit 13 which is an already buried object. The end of the embedded display tape 11 is raised at the position of the standard pillar 15, and an alternating current is passed from this end to the electric wire 12b in the embedded display tape 11 to generate a magnetic field. In this case, the work of detecting the conduit 13 is performed by moving the magnetic field detector 16 on the ground surface and detecting the position of the generated magnetic field. As shown in FIG. 4, the means for generating a magnetic field from the embedded display tape 11 causes an alternating current to flow through the coil 18 by the transmitter 17, thereby generating an induced current in the electric wire 12b, and the induced current causes the electric wire 12b to flow. Generate a magnetic field around. Then, this magnetic field is detected by the receiver 20 through the coil 19. The magnetic field detector 16 described above includes a coil 19 and a receiver 20. Although the electric wire 12b is embedded in the display tape main body 12a in the above embodiment, the electric wire 12b is not limited to the above embodiment and may be attached by being exposed on the surface of the display tape main body 12a.

[0006]

[Effect of device]

 As described above, according to the present invention, in an embedded display tape that is buried in the ground and used for detecting an existing buried object, it consists of the display tape body and the electric wire arranged in the longitudinal direction thereof. By passing a current through this wire and detecting the magnetic field generated there, it is possible to accurately know the buried position of the existing buried object, so it is possible to prevent damage to the lifeline due to excavation work. is there.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of an embedded display tape according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which the embedded display tape is embedded.

FIG. 3 is a side view showing a state in which the embedded display tape is embedded.

FIG. 4 is an explanatory diagram of means for generating a magnetic field in the embedded display tape.

FIG. 5 is a diagram showing a conventional embedded display tape.

[Explanation of symbols]

 11 Embedded Display Tape 12a Display Tape Main Body 12b Electric Wire 13 Conduit 14 Soil 15 Standard Column 16 Magnetic Field Detector 17 Transmitter 18, 19 Coil 20 Receiver

Claims (1)

[Scope of utility model registration request] 1. A buried display tape which is buried in the ground and used for detecting an existing buried object, which comprises a display tape body and an electric wire arranged in the longitudinal direction thereof.