JPH0968429A - Position indicator and its installation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a position indicator by which a position recognition operation and an information recognition operation are performed precisely and simply and which can be buried into the ground easily. SOLUTION: A driving-in member 12 is attached, so as to be detachable, to the upper part of a position indication member 1 which has housed a discrimination body 2. A downward blow is applied to the upper part of the driving-in member 12. The driving-in member 12 and the position indication member 1 are buried into the ground G. After that, the driving-in member 12 is pulled out so as to be separated from the position indication member 1. The position indication member 1 is left inside the ground G.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried condition of a cable, a water pipe, a gas pipe, etc. buried in the ground, or
The present invention relates to a position indicator that indicates the location of a land or road used when conducting a land ownership survey.

[0002]

2. Description of the Related Art As a position indicating member of this kind, an identification body having various information recorded therein is attached to the head of a pile body in the shape of an elongated rod, and a cap covering the identification body is fitted into the head. The present inventors have previously proposed a position indicator in which the whole or a part of the cap is attached to the surface of the ground and the information of the identifier is read from the outside by a detector without contact (Patent application 6-33098).

[0003]

However, depending on the purpose and place of use, it may not be preferable to expose the head of the position indicating member above the ground from the beginning. For example, if the position marking member is installed in a location that is easily visible, and if its head is exposed from the ground, the position marking member itself may be pulled out by mischief or the identification body attached to it may be external. There is a risk that the information will be lost if it is taken out to the office.

Further, when the position indicating member is embedded in a road or the like on which a vehicle or a person passes, if the head of the position indicating member is exposed, it obstructs the passage of the position indicating member and the position indicating member may be damaged. . Therefore, in such a case, it is preferable to completely embed the position indicating member in the ground.

An object of the present invention is to embed a position indicating member in the ground for accurate and simple position confirmation and information confirmation, and to provide a position indicator which can be easily embedded in the ground and a method of installing the position indicator. It is intended to be provided.

[0006]

In order to achieve the above-mentioned object, according to one configuration of the present invention, a position indicating member embedded in the ground and a sign information are built in, and the position indicating member is housed in the position indicating member and externally provided. From the identification body that can read the above-mentioned marking information in a non-contact manner, and the position marking member is detachably attached to the above position marking member, and a downward impact is applied to the upper part, so that it sinks to the ground together with the position marking member attached to the lower part. The position indicating member is embedded in the ground, and an operating portion for separating the position indicating member from the position indicating member is provided on the upper part of the driving member. According to this configuration, the driving member is detachably attached to the upper portion of the position indicating member accommodating the identification body, and the upper portion of the driving member is hit downward to embed the driving member and the position indicating member in the ground. After that, the operating member separates the driving member from the position indicating member and pulls it out to leave the position indicating member in the ground, so that the position indicating member can be easily embedded in the ground. In addition, the identification body in the ground enables accurate and easy confirmation of position and information.

In a preferred embodiment of the present invention, the driving member and the position indicating member are screwed to each other, and the operating portion is a handle for rotating the driving member.
According to this configuration, the driving member can be separated from the position indicating member by gripping the operating portion and rotating the driving member. After detaching, the driving member is pulled out from the ground.

In a preferred embodiment of the present invention, the position indicating member has a sign member extending above the position indicating member. According to this configuration, since the marker member is located near the ground surface,
By digging up the ground a little, the sign member appears, so that the presence of the position indicating member can be easily confirmed.

According to another structure of the present invention, an identification body which contains the marking information and can read the marking information from the outside in a non-contact manner is housed in the position marking member and can be detached from the position marking member. By applying a downward impact to the upper part of the attached driving member, the driving member is settled on the ground together with the position indicating member attached to the lower part,
The position indicating member is embedded up to a predetermined position in the ground, the driving member is separated from the position indicating member, and then pulled out from the ground to leave the position indicating member in the ground. According to this configuration, the driving member is detachably attached to the upper portion of the position indicating member accommodating the identification body, and the upper portion of the driving member is hit downward to embed the driving member and the position indicating member in the ground. After that, the driving member is detached from the position indicating member and pulled out so that the position indicating member remains in the ground, so that the position indicating member can be easily embedded in the ground. In addition, the identification body in the ground enables accurate and easy confirmation of position and information.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a perspective view of a position indicator according to an embodiment of the present invention. This position indicator A is
The position indicating member 1 and the driving member 12 detachably attached to the position indicating member 1 are provided.

The body 1a of the position indicating member 1 has a conical sharpened portion 11 on the tip side and a cylindrical head 10 on the other end side. As shown in FIG. 2, the outer surface of the main body 1a made of a resin such as polyethylene or polypropylene that has been molded is covered with a cover 1b made of a non-magnetic metal such as non-magnetic stainless steel. .
However, the cover 1b may be omitted. An accommodating portion 13 formed of a circular recess having an opening on the top surface 10a side is formed in the head portion 10, and the accommodating portion 13 is contacted from the outside without contact, such as the identification number of the position indicator A. A disc-shaped identification body (tag) 2 from which the marking information can be read is incorporated.
A resin lid 14 that closes the upper opening of the housing 13 is screwed to the upper portion of the housing 13. Also, the lid 14
In the upper part of the, there is provided a marking member 16 which is integrally molded with the lid 14 and has a cross-shaped cross section and extends above the lid 14. For this reason, the lid 14 can be easily attached and detached by the rotation of the marking member 16, so that the identification body 2 can be easily stored in the position indicating member 1. The marking members 16 are colored. For example, red is used for electric cables, yellow is used for gas pipes, and blue is used for water pipes. It will be easier. In addition, the position indicator member 1 including the marker member 16 is molded in a state where the identification body 2 is built in the position indicator member 1.
It may be so-called insert molding.

Further, as shown in FIG. 1, the driving member 12
Is obtained by welding a lid 12c having an operation portion 12b, which is formed by two handles extending in the horizontal direction and closing the upper end opening, to the upper end of a cylindrical metal pipe portion 12a. The lower portion of the pipe portion 12a and the cover 1 of the position indicating member 1
The head 10 of b is screwed with the threaded portion S, and the driving member 12 can be attached to or detached from the position indicating member 1 by rotating the operating portion 12b in the forward or reverse direction.

The method of installing this position indicator will be described below with reference to FIG. First, referring to FIG. 3 (A), the driving member 12 is vertically mounted with the driving member 12 mounted on the upper portion of the position indicating member 1 accommodating the identifying body 2 by screw coupling, and the driving member 1
The upper lid 12c of 2 is hit downward with a hammer H or the like. Then, the position indicating member 1 together with the driving member 12 sinks into the ground G and is embedded to a predetermined position (for example, a depth of 30 cm) in the ground G. In this case, since the impact impact force is applied to the cover 1b of the position indicating member 1, the main body 1
Does not damage a.

Next, referring to FIG. 3B, the driving member 1
2 and the position indicating member 1 are embedded at a predetermined position in the ground G, the handle of the operating portion 12b of the driving member 12 is rotated in the horizontal direction to release the connection of the screw portion S, and the driving member 12 is removed. The position indicating member 1 is disengaged. After that, the driving member 12 is lifted up and pulled out from the ground G, and the pulled out hole is filled back. As a result, as shown in FIG. 3C, only the position indicating member 1 having the marker member 16 remains in the ground G. In this way, the position indicating member 1 is installed in the ground G.

As a preferred embodiment of the discriminator 2, a magnetic discriminator which generates an electromagnetic wave of a specific frequency when a magnetic field is applied from the outside is used.

As the magnetic discriminating body 2, for example, a marker described in Japanese Patent Publication No. 3-501030 (published on March 22, 1991) is preferably used. The magnetic discriminator 2 is formed by appropriately arranging a resonant substance and a magnetic material, or by appropriately mixing the two, and utilizes a magnetic resonance phenomenon when a magnetic field is applied to the magnetic substance to give a unique frequency ( It is formed so as to generate an electromagnetic wave having a resonance frequency.
In other words, the magnetic resonance phenomenon occurs when a particle having a magnetic moment is in a static magnetic field and an oscillating magnetic field or an electromagnetic wave is applied, and nuclear magnetic resonance (NMR) by nuclear spins and nuclear quadrupole resonance (NQR), electron spin resonance or electron paramagnetic resonance (ESR, EPR), or ferromagnetic resonance, ferrimagnetic resonance, antiferrimagnetic resonance, or the like. In the magnetic resonance phenomenon, the dipole moment that precesses in the magnetic field absorbs or secondarily radiates a microwave, that is, an electromagnetic wave of a predetermined frequency (resonance frequency) at or near the precession frequency in the precession. Appear in shape.

Further, as the magnetic discriminating body 2, the E
The magnetic resonance phenomenon due to SR is preferably used. And
Paramagnetic salts, for example, paramagnetic ions such as copper, iron and manganese are used as the resonance substance used in such ESR. Furthermore, organic substances having stable free radicals such as naphthalene and nitroxide can also be used.

Further, as the magnetic discriminator 2, it is also possible to utilize the magnetic resonance phenomenon by the NMR, and at this time, nuclei having a pure nuclear spin such as hydrogen, nitrogen, chlorine and calcium. It is also possible to use a compound containing as a resonance substance.

Further, as the magnetic material forming the magnetic discriminator 2, a crystal of a metal used as the resonance substance, an amorphous (non-crystalline) metal, or a ferrite is used, and further, a permanent magnet or a semi-permanent. A magnet etc. can also be used.

The cover 1b of the position indicating member 1 is preferably non-flammable so as to protect the discriminator 2 from a fire or the like, and non-magnetic so as not to affect the magnetism generated from the magnetic discriminator 2. In addition to a material, for example, a non-magnetic metal such as the above-mentioned non-magnetic stainless, ceramics, a non-flammable resin such as a phenol resin or a urea resin, or the like is used.

FIG. 4 shows a position indicator system using the position indicator A of the present invention, and this system includes a detector B for detecting the position indicator A. Detector B
Consists of a detector 3 and a notification means 4, and this detector 3
The magnetic detector 3 is used to read the marking information such as the identification number of the position indicator A from the magnetic identifier 2 in a non-contact manner. This magnetic detector 3 includes a magnetic field generator 31 that generates a directional magnetic field, and the magnetic field generator 3
When the magnetic field generated in 1 is applied to the magnetic discriminator 2, the receiver 32 receives an electromagnetic wave of a specific frequency transmitted from the discriminator 2. Further, the notification means 4 is composed of, for example, an optical marker or an alarm buzzer, and when the magnetic detector 3 comes close to the magnetic discriminator 2 and the intensity of the electromagnetic wave to be emitted from the magnetic discriminator 2 becomes large, it is discriminated. I will inform you.

Further, the detector B has a memory 5 storing various information corresponding to the specific frequency transmitted from the magnetic body 2, that is, the marking information, and information corresponding to the detected frequency from the memory 5. The reading means 6 for reading and the display means 7 such as a display or a printer for displaying the read information are provided. Further, the above position marking system is provided with the identification code adding means 8 for adding or changing the frequency peculiar to the magnetic identification body 2.

As the identification code adding means 8, as described in the above-mentioned publication, an electromagnetic beam or a particle beam capable of chemically, crystallographically or physically changing the resonance characteristic of the magnetic identification body 2 is used. Is used, and by emitting such a beam to the magnetic discriminator 2, a specific frequency, that is, a resonance frequency, which is the marking information of the magnetic discriminator 2 itself is added, and the frequency is appropriately changed. To do. Furthermore, it is possible to add or change the frequency by bringing a chemical agent into contact with the magnetic discriminator 2, or by changing the positional relationship or the mixing ratio of the resonance element and the magnetic material of the magnetic discriminator 2. Is.

Next, the operation of the above position marking system will be described. For example, when investigating the buried state of a gas pipe, first, the position indicating member 1 provided with the magnetic identification body 2 is driven into the ground G with the driving member 12 attached. Then, the driving member 12 is detached and pulled out to leave the position indicating member 1 in the ground. Then, when reconfirming the buried condition, the detector B is used to search for the position indicating member 1.

At this time, when the directional magnetic field generated by the magnetic field generator 31 of the magnetic detector 3 constituting the detector B is added to the magnetic discriminator 2 of the position indicating member 1, the magnetic field is generated. An electromagnetic wave having a specific frequency is emitted from the identifier 2 and is received by the receiver 32. Then, the detector B
When approaching the magnetic discriminator 2 and the intensity of the electromagnetic wave received by the receiver 32 becomes large, the notifying means 4 operates to confirm the position of the position indicating member 1. Therefore, even when the position indicating member 1 is completely buried in the ground G, the position of the position indicating member 1 can be easily and accurately confirmed by the detector B.

Since the magnetic discriminator 2 is accommodated in the accommodating portion 13 formed on the head 10 of the position indicating member 1, the magnetic discriminator 2 is protected and can be used for a long period of time. Moreover, by forming the cover 1b of the position indicating member 1 from a non-combustible material such as non-magnetic stainless steel, non-combustible resin or ceramics, the magnetic identification body 2 is protected from fire. Furthermore, since the position indicating member 1 is completely embedded in the ground G, it cannot be easily taken out by mischief or the like, and the magnetic identifier 2 is prevented from being taken out from the outside.
Information loss is prevented. In addition, it does not hinder traffic on roads.

In this case, since the marking members 16 which are color-coded for each buried pipe are located in the shallow portion of the ground G, the colored marking members 16 appear only by excavating the ground G a little. Therefore, the presence of the position indicating member 1 can be easily confirmed, and the type of the buried pipe can be confirmed by its appearance. Further, when the hole in which the driving member 12 has been pulled out is backfilled, if the ground G around the position indicating member 1 is soft, the position indicating member 1 may collapse, whereas in the present invention, the marker member 16 is Since the upright posture is maintained by receiving the force of the buried soil from the side along the longitudinal direction, the position indicating member 1 can be prevented from falling. The marking member 16 may be exposed on the surface of the ground G or slightly exposed when there is no risk of mischief or obstruction to traffic.

Further, when the position indicating member 1 is used for cadastral survey or the like, the memory 5 provided in the detector B stores the section number of the land, the name of the landowner, the distance from the reference point and the direction, Various information such as coordinate values is stored. When the magnetic field from the magnetic field generator 31 of the magnetic detector 3 is added to the magnetic discriminator 2 and an electromagnetic wave is emitted from the magnetic discriminator 2, it is given in advance corresponding to its specific frequency. For example, the partition number and various stored information are read from the memory by the reading means 6 and displayed on the display means 7. Therefore, it is possible to easily manage various types of information when managing the land ownership. If the section number is attached to the land register, the position can be confirmed by the land register. Further, a part of various information stored in the memory 5, such as the embedding position of the position indicator A and the date of embedding thereof, may be given to the magnetic discriminator 2 as the indicator information.

In this embodiment, the position indicating member 1
Although the driving member 12 and the driving member 12 are screw-coupled to each other, as shown in FIG. 5, an annular step is provided on the head 10 of the position indicating member 1 so that the driving member 12 can be simply placed on the protruding step portion F. Good.

The position indicating member 1 of the present invention can also be used with the driving member 12 removed. For example, as shown in FIG. 6, after burying a buried pipe such as a gas pipe, first,
G1 is buried and the position indicating member 1 alone is placed thereon, and then G2 is buried and backfilled. In this case, since the marker member 16 receives the force of the buried soil from the side along its longitudinal direction and maintains the upright posture, the position indicating member 1 can be prevented from falling.

In this embodiment, the position marking member 1 has the marking member 16, but the marking member 16 may be omitted if confirmation at a shallow position in the ground is unnecessary.

[0032]

As described above, according to the present invention, the driving member is removably attached to the upper portion of the position indicating member accommodating the identification body, and the driving member is driven downward by striking the driving member. Since the member and the position indicating member are embedded in the ground, and then the driving member is detached from the position indicating member and pulled out so that the position indicating member remains in the ground, the position indicating member can be easily embedded in the ground. In addition, the identification body in the ground enables accurate and easy confirmation of position and information.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a position indicator according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing the position indicator.

FIG. 3 is a vertical cross-sectional view showing a method of installing the position indicator.

FIG. 4 is a block diagram showing a position indicating system using a position indicating device.

FIG. 5 is a vertical cross-sectional view showing another embodiment.

FIG. 6 is a vertical cross-sectional view of the ground showing an example of how to use the position indicating member which is not included in the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Position indicating member, 2 ... Identification body, 12 ... Driving member, 1
2a ... pipe section, 12b ... operation section.

Claims (4)

[Claims] 1. A position marking member to be embedded in the ground, an identification body containing the marking information, housed in the position marking member, and capable of reading the marking information from outside without contact, and the position marking member. And a driving member that is detachably attached to the upper part, and that is set downward to sink into the ground together with the position indicating member attached to the lower part, and the position indicating member is embedded in the ground. A position indicator provided with an operation section for detaching the position indicator member from the upper part of the position indicator. 2. The position indicator according to claim 1, wherein the driving member and the position indicating member are screw-coupled to each other, and the operating portion is a handle for rotating the driving member. 3. The position indicator according to claim 1, wherein the position indicating member has a sign member extending above the position indicating member. 4. An identification body having built-in marking information and capable of reading the marking information from the outside in a non-contact manner is housed in a position marking member, and is attached to an upper portion of a driving member detachably attached to the position marking member. By hitting downward, the driving member is settled in the ground together with the position indicating member attached to the lower part, and the position indicating member is embedded to a predetermined position in the ground, and the driving member is moved from the position indicating member. A method of installing a position indicator that allows the position indicating member to remain in the ground after being detached and then pulled out from the ground.