JP5156996B2 - Underground object position indicator - Google Patents

Description

  The present invention relates to a buried object position indicating tool that is laid near various cables and pipes buried in the ground and indicates the positions of these buried objects.

  Conventionally, when pipes such as gas and water, cables for information communication or distribution (hereinafter referred to as underground objects) are buried in the ground, the vicinity of these underground objects, specifically the ground surface A sign sheet (embedded sign marking band) displaying a sign such as “Caution for this lower cable” is buried between the underground buried object (see, for example, Patent Document 1). This marking sheet is a flexible sheet material formed in a band shape with synthetic resin fibers such as polyethylene and polypropylene. And this marking sheet is laid along the arrangement | positioning direction of the said underground embedment, with the display surface of the above-mentioned sign on the upper side (ground side). In this way, by burying the sign sheet together with the underground object, the operator can grasp the existence of the underground object by digging up the sign sheet during excavation work in construction work or civil engineering work. .

  In recent years, however, the number of underground objects has increased, and some of these underground objects are embedded closer to the ground surface to avoid interference with other underground parts. For this reason, there are cases where underground objects are damaged by excavation work or the like even when the above-described marking sheet is used. In order to prevent such accidents, it is desirable to conduct preliminary excavation surveys for underground objects when performing construction work and civil engineering work, but there is a problem that the burden of time, cost, labor, etc. increases. .

  Under these circumstances, a wireless marker (IC tag) is embedded in the vicinity of the underground object in addition to the above-described sign sheet, and an electromagnetic induction method or a radio wave method is used between the wireless marker and a ground detector (reader). There has also been proposed a technique for detecting the presence of underground objects in a non-contact manner by performing wireless communication using, for example, Patent Document 2. By using this technique, it is possible to grasp the existence of underground objects without conducting a preliminary excavation survey, and therefore, it is possible to reduce the burden during work compared to the case of performing a preliminary excavation survey.

JP 2000-144656 A Japanese Utility Model Publication No. 63-081277

  When such a wireless marker is used alone, it is necessary to arrange a plurality of wireless markers at a certain interval along the underground object. For this purpose, it is necessary to perform surveying. There was a problem that the work process at the time of construction increased or became complicated because it was necessary to embed.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an underground object position indicator that can be easily laid without increasing or complicating the construction process. It is to provide.

The present invention has been proposed in order to achieve the above-mentioned object, and the object described in claim 1 is laid between the ground surface and the underground object, and indicates that the underground object is embedded. Buried object marking band to be marked,
A wireless marker that performs wireless communication with the detector;
An adapter for attaching the wireless marker to the buried object marking band;
With
The adapter is composed of a first joint body having a holder portion for holding the wireless marker, and a second joint body provided in a pair with the first joint body,
The first joint body and the second joint body are connected in a state where the buried object marking band is sandwiched between each other ,
The holder part has an accommodation empty part for accommodating a wireless marker therein, and the accommodation empty part opens a lateral notch opening through which the wireless marker can pass on a side surface of the holder part,
A wireless marker is accommodated from the opening in the accommodating space, and the opening is locked to the holder portion by the elasticity of the drop-off prevention ring in a state where the opening is closed from the side by a notch ring-like drop-off prevention ring. It is an underground buried object position indicator characterized by attaching to the adapter .
Moreover, the thing of Claim 2 provides the groove-shaped part which the said fall prevention ring can fit in the outer periphery of the said holder part,
The drop-off prevention ring includes a cover portion that closes the opening of the holder portion, and arm portions on both sides that are formed in an arc shape following the outer peripheral shape of the groove-shaped portion,
At the tip of the arm part, a locking claw is projected toward the ring center side,
The groove portion is provided with a locking portion that can be locked by the locking claw of the arm portion,
When the drop-off prevention ring is fitted into the groove-like part, the locking claw is locked to the locking part by the elasticity of the arm part, and the cover part is stopped on the holder part in a state of closing the opening. 2. The underground buried object position indicator according to claim 1, wherein the underground buried object position indicator is worn.

According to a third aspect of the present invention, either the first joint body or the second joint body has a contact surface with a buried object marking band of one of the joint bodies, and a connection pin faces the other joint body. Projecting and opening a through hole through which the connecting pin is inserted in the contact surface with the buried object marking band of the other joint body,
In a state where the connecting pin of the one joint body passes through the embedded object marking band and is inserted into the insertion hole of the other joint body, the first joint body and the first joint body The underground position indicator according to claim 1 or 2, wherein the second joint body is connected.

According to the underground buried object position indicator of the present invention, the following excellent effects can be obtained.
That is, an embedded object marking band, a wireless marker, and an adapter for attaching a wireless marker to the embedded object marking band, the adapter includes a first joint body having a holder portion for holding the wireless marker, and the first It is composed of a joint body and a second joint body provided in a pair, and the first joint body and the second joint body are connected in a state where the buried object marking band is sandwiched between each other , and the holder portion is wireless It has an accommodating space for accommodating a marker inside, the accommodating space opens a lateral cutout opening through which a wireless marker can pass on the side surface of the holder portion, and accommodates the wireless marker in the accommodating space from the opening, the opening, by locking the holder portion by the elasticity of the falling-off prevention ring in the state of closed laterally by cutouts ring captive ring, since mounting a wireless marker to the adapter, as in the prior art A separate wireless marker step can be omitted, and multiple wireless markers can be easily placed along the underground object at regular intervals together with the embedded object marking zone without requiring specialized knowledge such as surveying. Can be buried. Moreover, by releasing the locking of the drop-off prevention ring with respect to the holder portion, only the wireless marker can be easily removed from the embedded object marking band without removing the adapter from the embedded object marking band.

  And after laying the underground buried object position indicator, it is possible to grasp the existence of underground buried objects by detecting the wireless marker using a detector in advance when performing construction work or civil engineering work. Even when the underground object is embedded at a position shallow from the ground surface, it is possible to prevent damage to the underground object due to excavation work or the like.

  In addition, by using the adapter having the above-described configuration, it is possible to attach a wireless marker to an existing buried object marking band by simple processing.

  In addition, since the wireless marker is attached to the buried object marking zone via an adapter, the adapter will function to protect the wireless marker even if excavation work is performed without any prior detection work. It is possible to suppress damage to the wireless marker due to the machine.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. In the embodiments described below, various limitations are made as preferred specific examples of the present invention. However, the scope of the present invention is not limited to the following description unless otherwise specified. However, the present invention is not limited to these embodiments.

  FIG. 1 is a schematic diagram for explaining a state in which the underground object position indicator 1 in the present embodiment is laid in the vicinity of the underground object 2. 2 is a partially enlarged perspective view of the underground object position indicator 1, FIG. 3 is a front view of the underground object position indicator 1, and FIG. 4 is an illustration of the underground object position indicator 1 from the wireless marker side. FIG. 5 is a cross-sectional view taken along line AA in FIG.

  As shown in FIG. 1, when underground structures 2 such as gas and water pipes and information communication or distribution cables are embedded in the ground (soil) 3, the ground surface S and the underground structures 2 In between, the underground buried object position indicator 1 which concerns on this invention is laid. The underground buried object position marking tool 1 in the present embodiment is configured by attaching a plurality of wireless markers 5 at regular intervals along a sheet longitudinal direction to a marking sheet 4 (a kind of buried object marking band in the present invention).

  The marking sheet 4 is a flexible sheet material formed in a strip shape with synthetic resin fibers such as polyethylene and polypropylene. On the surface of the marking sheet 4, a sign such as “This lower cable caution” is displayed by printing or the like. The sign sheet 4 is laid along the direction in which the underground object 2 is disposed with the display surface of the sign on the upper side (ground side).

  FIG. 6 is a front view for explaining the appearance of the wireless marker 5 in the present embodiment. As shown in the drawing, the case 8 of the wireless marker 5 includes a body portion 9 having a test tube shape and a neck portion 10 formed at the upper end portion of the body portion 9. The outer diameter of the neck part 10 is larger than the outer diameter of the body part 9. Thereby, a step portion 11 is formed at a boundary portion between the neck portion 10 and the trunk portion 9. An IC tag (not shown) is accommodated in the case 8, for example, by performing short-distance (several centimeters to several meters) wireless communication with a detector (reader) carried by a worker on the ground. The detector is configured to be able to detect non-contact from the ground. As a communication method, an electromagnetic induction method in which communication is performed by magnetically coupling a coil of an IC tag and a detector coil, a radio wave method in which communication is performed by electromagnetic waves between the IC tag and the detector, or the like can be employed. . As this IC tag, it is desirable to adopt a passive type. The wireless marker 5 configured in this way is attached to the marking sheet 4 via the adapter 6.

  FIGS. 7A and 7B are diagrams illustrating the configuration of the adapter 6, where FIG. 7A is an exploded perspective view of the adapter 6, and FIG. 7B is a connection of the first joint body 13 to the insertion hole 24 of the second joint body 14. The perspective view which shows the state which penetrated the pin 15 and accumulated these joint bodies, (c) shows the state which connected the joint bodies by crimping the front-end | tip part of the connection pin 15 in the state of (b). It is a perspective view. In addition, illustration of the marking sheet 4 is abbreviate | omitted in the same figure. As shown in the figure, the adapter 6 is composed of two joint bodies 13 and 14 which are paired up and down. These joint bodies 13 and 14 are made of, for example, a synthetic resin or metal having a relatively high strength such as polyacetal.

  FIG. 8 is a diagram for explaining the configuration of the first joint body 13, (a) is a perspective view of the first joint body 13, (b) is a front view of the first joint body 13, and (c). FIG. 3 is a rear view of the first joint body 13. As shown in the figure, the first joint body 13 includes a contact plate 13a that contacts the back surface of the marking sheet 4 (a surface opposite to the sign display surface), and a holder portion 13b that holds the wireless marker 5. It is composed of The contact plate 13 a is a plate material formed in a disk shape, and its upper surface functions as a contact surface that contacts the marking sheet 4. The contact plate 13a is formed with a plurality of (six in this embodiment) connecting pins 15 erected perpendicularly to the contact surface along the circumferential direction of the contact surface. The total length of the connecting pin 15 is designed to be longer than the dimension obtained by combining the thickness of the second joint body 14 and the thickness of the marking sheet 4. In addition, the distal end portion of the connecting pin 15 is formed in a tapered shape so as to become thinner toward the distal end, and when attached to the marking sheet 4, it is easy to insert into the marking sheet 4 or an insertion hole 24 described later. .

  The holder portion 13b is integrally formed on the lower surface of the contact plate 13a opposite to the contact surface. The holder part 13b is formed in a hollow cylindrical shape, and the internal space is an accommodation empty part 16 in which the neck part 10 of the wireless marker 5 is accommodated. The inner diameter of the accommodation space 16 is set slightly larger than the outer diameter of the neck 10 of the wireless marker 5, and the height (the dimension in the direction perpendicular to the contact plate 13 a) of the accommodation space 16 is set as the wireless marker. 5 is designed to be slightly larger than the height of the neck 10. Further, a through hole 17 is formed in the bottom portion of the holder portion 13b so as to penetrate the housing thickness portion 16 through the plate thickness direction. The inner diameter of the through hole 17 is set slightly larger than the outer diameter of the body portion 9 of the wireless marker 5. And this holder part 13b is shape | molded by the cross-sectional substantially U shape which a part of the surrounding wall was missing and the accommodation empty part 16 opened to the side. The neck 10 of the wireless marker 5 is accommodated in the accommodating space 16 through the opening. In this accommodated state, the step portion 11 of the neck portion 10 is locked to the bottom of the accommodation empty portion 16 (the portion indicated by B in FIG. 8B) so that the wireless marker 5 does not fall down from the holder portion 13b. It has become. Therefore, the bottom portion B functions as a receiving portion or a supporting portion for the wireless marker 5.

  Furthermore, the upper half of the peripheral wall of the holder portion 13b is formed in a groove shape by making the wall thickness thinner over the entire circumference than the lower half, and the groove portion 18 is held by the holder portion 13b. A drop prevention ring 20 for preventing the wireless marker 5 from dropping is attached. As shown in FIG. 8C, on the back side of the groove-like portion 18 (on the side opposite to the opening), there are slits at positions corresponding to two locking claws 23 of the drop-off preventing ring 20 described later. A shaped locking portion 19 is formed. The locking portion 19 is configured by a depression that is recessed from the outer peripheral surface side to the inner peripheral surface side of the groove-like portion 18 in the middle of the thickness direction, or a through hole that penetrates the thickness direction of the groove-like portion 18. Yes.

  9A and 9B are views for explaining the configuration of the drop-off prevention ring 20, wherein FIG. 9A is a perspective view of the drop-off prevention ring 20, FIG. 9B is a plan view of the drop-off prevention ring 20, and FIG. 9C is a first joint body. 13 is the front. The drop-off prevention ring 20 is a member formed in a notch ring shape from a synthetic resin. The drop-off prevention ring 20 is formed in an arc shape following the outer peripheral shape of the cover portion 21 that covers the neck portion 10 of the wireless marker 5 exposed at the opening portion of the accommodation empty portion 16 and the groove portion 18 of the holder portion 13b. And arm portions 22 on both sides. The cover portion 21 is formed to be thicker than the arm portion 22, and is configured such that the inner surface of the arc contacts the neck portion 10 of the wireless marker 5 with the drop-off prevention ring 20 attached to the groove-shaped portion 18. Yes. The arm part 22 is more elastic than the cover part 21 by being thinner. The distance D (see FIG. 9B) between the tips of the arm portions 22 is set to be smaller than the outer diameter of the groove-shaped portion 18 of the holder portion 13b. In addition, a locking claw 23 is provided at the tip of each arm portion 22 so as to project toward the center of the ring corresponding to each locking portion 19 of the groove-shaped portion 18.

  When attaching the drop-off prevention ring 20 to the groove-shaped portion 18 of the holder portion 13b, a posture in which the cut-out portion of the ring faces the opening of the groove-shaped portion 18 (lateral cut-out opening of the C-shaped holder portion 13b). And fitted into the groove-like portion 18 side from the side. At this time, the arm portions 22 on both sides can be smoothly fitted into the groove portion 18 by being pushed in while being elastically deformed in a direction away from each other along the outer peripheral shape of the groove portion 18. When the drop-off prevention ring 20 is further pushed into a position where the inner peripheral surface of the cover portion 21 is in contact with the neck portion 10 of the wireless marker 5, the arm portions 22 on both sides are restored in a direction close to each other by elasticity and the groove-like portion 18 is restored. At the same time, the locking claw 23 of each arm portion 22 is locked to the locking portion 19 of the groove-shaped portion 18. Thereby, the drop-off prevention ring 20 is fixed to the groove-like portion 18 of the holder portion 13b in a state of covering the neck portion 10 of the wireless marker 5, and the wireless marker 5 is prevented from dropping from the holder portion 13b.

  As shown in FIG. 7, the second joint body 14 is a disk-shaped plate material formed in the same shape as the contact plate 13 a of the first joint body 13. The lower surface of the second joint body 14 functions as a contact surface with respect to the marking sheet 4. In the second joint body 14, a plurality of insertion holes 24 penetrating in the plate thickness direction are provided corresponding to the connection pins 15 of the first joint body 13.

  And when attaching the adapter 6 of the said structure to the indication sheet | seat 4, first, the connection pin 15 of the 1st joint body 13 is penetrated through from the back surface side of the indication sheet | seat 4, or the connection pin 15 is inserted in the indication sheet | seat 4. A hole that can be inserted is formed in advance, and the connecting pin 15 is inserted through the hole, and the leading end side of the connecting pin 15 is projected to the surface side of the marking sheet 4. Next, the protruding connecting pin 15 is inserted into the insertion hole 24 of the second joint body 14 so that the contact surfaces of the first joint body 13 and the second joint body 14 face each other. The sign sheet 4 is held between the two. In this clamping state, the tip of the connecting pin 15 protrudes from the insertion hole 24 on the surface side of the second joint body 14 (state shown in FIG. 7B. The illustration of the marking sheet 4 is omitted). Then, the first joint body 13 and the second joint body 14 are transformed into the sign sheet 4 by deforming the protruding tip of the connecting pin 15 into a state of being crushed by, for example, cold caulking or the like. Connect in a sandwiched state. If the adapter 6 is attached to the marking sheet 4 in this way, the wireless marker 5 is attached to the marking sheet 4 by holding the wireless marker 5 on the holder portion 13b of the first joint body 13 in the above-described procedure. be able to.

  In this way, by attaching a plurality of wireless markers 5 at a constant interval (for example, 1 m interval) via the adapter 6 along the longitudinal direction of the indication sheet 4, the underground buried object position indicator 1 is completed. The When laying the underground buried object position indicator 1, first, an underground buried object 2 such as a cable is buried, and a soil having a thickness of several tens of centimeters to several meters is formed on the buried underground buried object 2. Cover. The underground marker position indicator 1 is laid along the direction in which the underground object 2 is disposed while sequentially inserting the wireless markers 5 into the soil. At this time, by inserting the wireless marker 5 into the ground in a posture perpendicular to the ground, the posture of the wireless marker 5 and the directivity during wireless communication can be stabilized, thereby detecting accuracy by the detector. Can be improved. If the underground buried object position indicator 1 is laid, it is further covered with soil and pressed, and the underground buried object position indicator 1 is buried at a position of about several tens of cm to 1 m from the ground surface.

As described above, according to the underground object position marker 1 according to the present invention, the wireless marker 5 is attached to the marking sheet 4 via the adapter 6, so that a single wireless marker is separately provided as in the prior art. The step of performing can be omitted, and the wireless marker 5 can be easily embedded at regular intervals without requiring specialized knowledge such as surveying. Then, by detecting the wireless marker 5 using a detector in advance when performing construction work or civil engineering work, it is possible to grasp the presence of the underground object 2 in the ground, and the underground object 2 Can be prevented in advance from being damaged by excavation work or the like even when it is buried at a shallow position from the ground surface. Further, when the wireless marker 5 is removed, the marking sheet 4 can be removed along one side, which is convenient. Furthermore, by using the adapter 6 having the above-described configuration, the wireless marker 5 can be attached to the existing sign sheet 4 with simple processing.
Further, the wireless marker 5 can be easily detached from the marking sheet 4, and the removed wireless marker 5 can be reused by attaching it to a new marking sheet 4.

  In addition, since the wireless marker 5 is attached to the marking sheet 4 via the adapter 6, the adapter 6 exhibits a function of protecting the wireless marker 5 even when excavation work is performed without performing a prior detection work. Therefore, it becomes possible to suppress damage to the wireless marker 5 due to an excavator or the like.

  The shapes of the adapter 6 and the wireless marker 5 are not limited to those exemplified in the above embodiment. For example, the contact surfaces of the joint bodies 13 and 14 of the adapter 6 may be polygonal rather than circular. Further, the wireless marker 5 is not limited to the cylindrical case 8, and a case having an arbitrary shape such as a box shape may be employed. Further, the attachment structure of the adapter 6 and the wireless marker 5 is not limited to that illustrated in the above embodiment. In short, any structure can be adopted as long as the wireless marker 5 can be easily attached to the adapter 6. Can do.

  Further, regarding the connection structure between the first joint body 13 and the second joint body 14, the connection pin 15 may be provided in the second joint body 14 and the insertion hole 24 may be provided in the first joint body 13. . Furthermore, the connection structure of the first joint body 13 and the second joint body 14 is not limited to the connection method by caulking the tip end portion of the connection pin 15, for example, the connection pin 15 of one joint body is connected to the other joint body. It is also possible to adopt a configuration in which both joint bodies are connected by fusing or bonding the connecting pin 15 to the other joint body in a state of being inserted through the insertion hole 24 of the joint body. Moreover, it is also possible to employ | adopt the structure which connects the 1st joint body 13 and the 2nd joint body 14 with magnetic force. According to this configuration, the wireless marker 5 can be attached to the marking sheet 4 without processing. Moreover, it is set as the fastener-type fastening structure which fits the recessed part and convex part which were formed in the 1st, 2nd joint bodies 13 and 14, and is attached in the state which pinches | interposes the indication sheet | seat 4 between a recessed part and a convex part May be taken.

It is a schematic diagram explaining the state which laid the underground buried object position indicator in the vicinity of the underground buried object. It is a perspective view of a buried object position indicator. It is a front view of a buried object position indicator. It is the top view which looked at the underground buried object position indicator from the wireless marker side. It is the sectional view on the AA line in FIG. It is a front view explaining the external appearance of a wireless marker. (A)-(c) is a perspective view explaining the structure of an adapter. (A)-(c) is a figure explaining the structure of a 1st joint body. (A)-(c) is a figure explaining the structure of the drop-off prevention ring 20. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Underground object position display tool, 2 ... Underground object, 3 ... Soil, 4 ... Marking sheet, 5 ... Wireless marker, 6 ... Adapter, 8 ... Case, 9 ... Body part, 10 ... Neck part, 11 ... Step part, 13 ... 1st joint body, 14 ... 2nd joint body, 15 ... Connecting pin, 16 ... Housing empty part, 17 ... Through-hole, 18 ... Groove-like part, 19 ... Locking part, 20 ... Dropping Prevention ring, 21 ... cover part, 22 ... arm part, 23 ... locking claw, 24 ... insertion hole

Claims (3)

A buried marking zone that is laid between the ground surface and a buried object and that indicates that the buried object is buried;
A wireless marker that performs wireless communication with the detector;
An adapter for attaching the wireless marker to the buried object marking band;
With
The adapter is composed of a first joint body having a holder portion for holding the wireless marker, and a second joint body provided in a pair with the first joint body,
The first joint body and the second joint body are connected in a state where the buried object marking band is sandwiched between each other ,
The holder part has an accommodation empty part for accommodating a wireless marker therein, and the accommodation empty part opens a lateral notch opening through which the wireless marker can pass on a side surface of the holder part,
A wireless marker is accommodated from the opening in the accommodating space, and the opening is locked to the holder portion by the elasticity of the drop-off prevention ring in a state where the opening is closed from the side by a notch ring-like drop-off prevention ring. An underground buried object position indicating tool characterized by attaching to the adapter . Provided on the outer periphery of the holder portion is a groove-like portion into which the drop-off prevention ring can be fitted,
The drop-off prevention ring includes a cover portion that closes the opening of the holder portion, and arm portions on both sides that are formed in an arc shape following the outer peripheral shape of the groove-shaped portion,
  At the tip of the arm part, a locking claw is projected toward the ring center side,
  The groove portion is provided with a locking portion that can be locked by the locking claw of the arm portion,
  When the drop-off prevention ring is fitted into the groove-like part, the locking claw is locked to the locking part by the elasticity of the arm part, and the cover part is stopped on the holder part in a state of closing the opening. The underground buried object position indicating tool according to claim 1, which is worn. A connecting pin protrudes toward the other joint body on the abutment surface of either the first joint body or the second joint body with the buried object marking band, and the other joint Open the insertion hole through which the connecting pin is inserted in the contact surface of the body with the buried object marking band,
  In a state where the connecting pin of the one joint body passes through the embedded object marking band and is inserted into the insertion hole of the other joint body, the first joint body and the first joint body 3. The underground buried object position indicator according to claim 1 or 2, wherein the second joint body is connected.

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