JPH0518714Y2 - - Google Patents
Info
- Publication number
- JPH0518714Y2 JPH0518714Y2 JP1987118397U JP11839787U JPH0518714Y2 JP H0518714 Y2 JPH0518714 Y2 JP H0518714Y2 JP 1987118397 U JP1987118397 U JP 1987118397U JP 11839787 U JP11839787 U JP 11839787U JP H0518714 Y2 JPH0518714 Y2 JP H0518714Y2
- Authority
- JP
- Japan
- Prior art keywords
- case
- marker
- force
- underground
- resonant circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003550 marker Substances 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 12
- 238000009933 burial Methods 0.000 claims 1
- 239000013078 crystal Substances 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 7
- 230000001154 acute effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、地中埋設物の近傍に予め標識体を埋
設しておき、後日、地上から上記標識体を検知す
ることにより上記地中埋設物の埋設地点を探知す
るようにした埋設物探知装置に関し、特に上記標
識体の構造に関するものである。[Detailed description of the invention] (Industrial application field) The present invention is based on the method of burying a marker in the vicinity of an underground object, and detecting the marker from the ground at a later date. The present invention relates to a buried object detection device configured to detect a buried location of an object, and particularly relates to the structure of the marker.
（従来の技術）
例えば、ガス管、水道管のような地中埋設物の
近傍にLC共振回路で構成された標識体（以下、
マーカーという。）を予め埋めておき、後日、地
上から上記LC共振回路の共振周波数成分を有す
る探知用信号を送出してこのLC共振回路の応動
（探知用信号の吸収又は共振信号の放出等）を検
知し、上記地中埋設物の埋設位置を探知するシス
テムが公知である。(Prior art) For example, a marker (hereinafter referred to as
It's called a marker. ) is filled in advance, and later a detection signal having a resonance frequency component of the above LC resonance circuit is sent from the ground to detect the response of this LC resonance circuit (absorption of detection signal or emission of resonance signal, etc.). A system for detecting the buried position of the above-mentioned underground objects is publicly known.
（考案が解決しようとする問題点）
かかるシステムのマーカーは、長期間にわたつ
て地中に埋められ、その間、電気的特性が良好に
維持されるようにするため、一般にLC共振回路
をケース内に密封して構成されるが、このマーカ
ーを埋めるときには土を被せた後、上方から転圧
等が加えられ、また、長期間にわたつて土圧が印
加された状態におかれるなど上記マーカーのケー
スには強い力が加わり、特に小石等がケースに当
る場合には、その部分にき裂を生ずることがあ
る。(Problem that the invention seeks to solve) Markers in such systems are generally buried underground for long periods of time, and in order to maintain good electrical properties during that time, the LC resonant circuit is generally placed inside the case. However, when burying this marker, after covering it with soil, rolling pressure is applied from above, and the marker is left in a state where earth pressure is applied for a long period of time. A strong force is applied to the case, and if a small stone or the like hits the case, cracks may occur in that area.
本考案は以上の問題点を解決し、強い力が加わ
つてもケースにき裂等が生じにくいマーカーの構
造を得ることを目的とする。 The present invention aims to solve the above-mentioned problems and to obtain a marker structure in which the case is less prone to cracking even when a strong force is applied.
（問題点を解決するための手段）
本考案地中埋設物探知用標識体は、地中埋設物
の近傍に埋設され、地上から送出した探知信号に
応動して上記地中埋設物の埋設地点を知らせるよ
うにした標識体において、上記探知信号の応動手
段はLC共振回路からなるものとされ、この応動
手段を収納するケースは、全体が偏平な円環形状
に形成されるとともに少なくともその上面が傾斜
面又は曲面となされたものである。(Means for solving the problem) The underground object detection marker of the present invention is buried near the underground object, and responds to the detection signal sent from the ground to detect the location of the underground object. In the beacon, the response means for the detection signal is composed of an LC resonant circuit, and the case housing this response means is formed into a flat annular shape as a whole, and at least its upper surface is It has an inclined or curved surface.
（作用）
応動手段がLC共振回路からなり、このLC共振
回路はいわゆる受動型であるため、地上からの探
知用信号のみに応動し、外部からの磁場の影響を
受けることがない。(Function) The response means consists of an LC resonant circuit, and since this LC resonant circuit is of a so-called passive type, it responds only to detection signals from the ground and is not affected by external magnetic fields.
また、応動手段を収納するケースは、全体が偏
平な円環形状に形成されるとともに少なくともそ
の上面が傾斜面又は曲面となされているから、設
置箇所に置くだけで姿勢が安定し、しかも上方か
ら加わる圧力に対して強く、破損し難い。 In addition, the case that houses the response means is formed into a flat annular shape as a whole, and at least its upper surface is an inclined or curved surface. Strong against applied pressure and difficult to break.
（実施例）
本考案の実施例に係るマーカーは、例えば第１
１図に示すようにループコイル１、水晶振動子
２、コンデンサ３の並列共振回路で構成されてい
る。(Example) The marker according to the example of the present invention is, for example, the first
As shown in Fig. 1, it consists of a parallel resonant circuit consisting of a loop coil 1, a crystal oscillator 2, and a capacitor 3.
〔第１実施例〕
第１図乃至第３図に第１実施例を示す。第１図
は平面図、第２図は第１図における−線拡大
断面図、第３図は第１図における−線切断端
面図である。[First Example] A first example is shown in FIGS. 1 to 3. 1 is a plan view, FIG. 2 is an enlarged sectional view taken along the line - in FIG. 1, and FIG. 3 is an end view cut along the line - in FIG. 1.
第１図乃至第３図に示すように第１実施例は、
偏平な円環形状のケース４の中にコイル１、水晶
振動子２及びコンデンサ３が収納され、ケース４
の少なくともコイル１、水晶振動子２及びコンデ
ンサ３を収納した部分に樹脂５を充填して、これ
らの各部材を保持するように構成されている。 As shown in FIGS. 1 to 3, the first embodiment is
A coil 1, a crystal oscillator 2, and a capacitor 3 are housed in a flat annular case 4.
A resin 5 is filled in at least a portion housing the coil 1, crystal oscillator 2, and capacitor 3 to hold these members.
ケース４は、コイル１を収納する円環部４０１
を外周円として、水晶振動子２及びコンデンサ３
を収納する円環部４０２を内周円として形成さ
れ、円環部４０１，４０２相互間は４本の連結部
４０３…で結合されていて、これらケース４を構
成する各部４０１，４０２，４０３は上部が鋭角
に形成された楔形状の断面を有している。すなわ
ち、ケース４の上面は傾斜面に形成されている。
従つて、第１０図に示すように、ケース４に垂直
上方から加わる力（埋設時、又は埋設後に転圧等
によつてマーカーに加わる力の方向は略垂直方向
である）をＦとすると、この力Ｆはケース４の面
に直交する方向の力F1とケース４の面に沿つた
方向の力F2に分散され、ケース４の上面の傾斜
角（垂直方向からの傾斜角）がθであるとする
と、力F1，F2はそれぞれ「F1＝Fsinθ」，「F2＝
Fcosθ」であつて、いずれの力F1，F2も加えられ
た力Ｆより小さい。また、上記力F1，F2のうち、
ケース４を破壊する方向に作用する力は主として
直交方向の力F1であり、上記関係からこの力F1
は傾斜角θが小さい程、小さくなる。すなわち、
ケース４の上面の傾斜が急な程、ケース４は転圧
等によつて加わる力に対して強くなる。 The case 4 includes an annular portion 401 that houses the coil 1.
is the outer circumference of the crystal oscillator 2 and the capacitor 3
The annular portion 402 that houses the case 4 is formed as an inner circumferential circle, and the annular portions 401 and 402 are connected by four connecting portions 403. It has a wedge-shaped cross section with an acute angle at the top. That is, the upper surface of the case 4 is formed into an inclined surface.
Therefore, as shown in FIG. 10, if the force applied to the case 4 from vertically above (the direction of the force applied to the marker by rolling pressure, etc. during burying or after burying is approximately vertical), then This force F is dispersed into a force F 1 in the direction perpendicular to the surface of the case 4 and a force F 2 in the direction along the surface of the case 4, and the inclination angle of the upper surface of the case 4 (inclination angle from the vertical direction) is θ , the forces F 1 and F 2 are respectively "F 1 = Fsinθ" and "F 2 =
F cos θ'', and both forces F 1 and F 2 are smaller than the applied force F. Also, among the above forces F 1 and F 2 ,
The force acting in the direction that destroys case 4 is mainly the force F 1 in the orthogonal direction, and from the above relationship, this force F 1
becomes smaller as the inclination angle θ becomes smaller. That is,
The steeper the slope of the upper surface of the case 4, the stronger the case 4 will be able to withstand forces applied by rolling pressure and the like.
〔第２実施例〕
第４図及び第５図に第２実施例を示す。第４図
は平面図、第５図は第４図における−線拡大
断面図である。[Second Embodiment] A second embodiment is shown in FIGS. 4 and 5. FIG. 4 is a plan view, and FIG. 5 is an enlarged sectional view taken along the - line in FIG. 4.
第４図及び第５図に示すように、第２実施例は
偏平な円環形状のケース４内にコイル１、水晶振
動子２及びコンデンサ３（但し、水晶振動子２、
コンデンサ３は図では省略してある）を収納して
なり、ケース４は断面形状が円状とされている。
すなわち、ケース４の表面は曲面に形成されてい
る。 As shown in FIGS. 4 and 5, in the second embodiment, a coil 1, a crystal oscillator 2, and a capacitor 3 (however, the crystal oscillator 2,
The case 4 has a circular cross-sectional shape.
That is, the surface of the case 4 is formed into a curved surface.
ケース４は上側４１と下側４２に２分割形成さ
れており、コイル１、水晶振動子２及びコンデン
サ３の並列共振回路を内部に収納した後、適宜の
手段で上側４１と下側４２とを接合して構成す
る。下側４２は本考案の目的からは必ずしも曲面
である必要はない。転圧等の力がケース４に加わ
つたときのこのケース４に作用する力について第
１０図により説明する（第１０図では第２実施例
のケースの符号４′で表している）。 The case 4 is formed into two parts, an upper side 41 and a lower side 42. After housing the parallel resonant circuit of the coil 1, crystal oscillator 2, and capacitor 3 inside, the upper side 41 and the lower side 42 are separated by an appropriate means. Join and compose. The lower side 42 does not necessarily have to be curved for purposes of the present invention. The force acting on the case 4 when a force such as rolling pressure is applied to the case 4 will be explained with reference to FIG. 10 (in FIG. 10, the case of the second embodiment is indicated by the reference numeral 4').
ケース４′に印加された力の作用点における接
線４が垂直方向に対してなす角度をθとすれば、
前記第１実施例の説明がそのまま第２実施例にも
当てはまる。また、第２実施例ではケース４′を
破壊する方向の力F1の作用点が曲面であるので
破壊力に対して実に強い構造となつている。 If the angle that the tangent 4 makes with the vertical direction at the point of application of the force applied to the case 4' is θ, then
The description of the first embodiment also applies to the second embodiment. Further, in the second embodiment, since the point of application of the force F1 in the direction of destroying the case 4' is a curved surface, the structure is extremely strong against destructive forces.
〔第３実施例〕
第６図及び第７図に第３実施例を示す。第６図
は平面図、第７図は同正面図である。[Third Embodiment] A third embodiment is shown in FIGS. 6 and 7. FIG. 6 is a plan view, and FIG. 7 is a front view thereof.
第６図及び第７図に示すように、第３実施例は
コイル１を例えば屋内配電用絶縁電線のように比
較的硬くて形状の保持が可能な線材を使用して円
形に形成し、その両端に水晶振動子２及びコンデ
ンサ３を収納したケース４を設けたものである。 As shown in FIGS. 6 and 7, in the third embodiment, the coil 1 is formed into a circular shape using a wire material that is relatively hard and can maintain its shape, such as an insulated wire for indoor power distribution. A case 4 housing a crystal resonator 2 and a capacitor 3 is provided at both ends.
上記水晶振動子２及びコンデンサ３を収納した
ケース４は、第７図で明らかなように上面が円錐
形に形成されていて表面が傾斜している。従つ
て、前記第１実施例と同様、ケース４は転圧等、
外部から加わる力に対して強い構造となつてい
る。なお、この第３実施例では、コイル１はケー
ス４内に収納されないが、このコイル１を構成す
る例えば上記屋内配電用絶縁電線は、その絶縁被
覆が外部からの力に対しても強いので問題はな
い。 As is clear from FIG. 7, the case 4 housing the crystal resonator 2 and the capacitor 3 has a conical upper surface and an inclined surface. Therefore, as in the first embodiment, the case 4 is used for rolling, etc.
The structure is strong against external forces. In this third embodiment, the coil 1 is not housed in the case 4, but the insulated wire for indoor power distribution that constitutes the coil 1, for example, has an insulation coating that is strong against external forces, so this is not a problem. There isn't.
〔第４実施例〕
第８図及び第９図に第４実施例を示す。この第
４実施例は平面の外観は前記第１実施例（第１
図）と同じであり、第８図は前記第２図に、第９
図は前記第３図にそれぞれ相当する図面である。[Fourth Example] A fourth example is shown in FIGS. 8 and 9. This fourth embodiment has a planar appearance similar to that of the first embodiment (first embodiment).
Figure 8 is the same as Figure 9 above.
The figures are drawings corresponding to the above-mentioned FIG. 3, respectively.
第４実施例は、第８図及び第９図で示すよう
に、前記第１実施例のケース４を２個、それぞれ
の下面同士を互いに重ね合わせて適宜の手段で結
合する形状をしており、円環部４０１，４０２及
び連結部４０３は上面、下面とも楔状に形成され
ている。 As shown in FIGS. 8 and 9, the fourth embodiment has a shape in which two cases 4 of the first embodiment are combined with each other by an appropriate means, with their lower surfaces superimposed on each other. , the annular portions 401, 402, and the connecting portion 403 are formed into a wedge shape on both the upper and lower surfaces.
このケース４が転圧等に強い形状であることは
前記第１実施例の説明で明らかであるが、これに
加え第４実施例はマーカーの付設時の仮固定がで
きる構造となつている。すなわち、例えばガス管
等の埋設工事において、掘つた土砂を埋め戻す際
にこのガス管の近傍にマーカーが付設されるが、
このマーカーの下面が傾斜して鋭角に形成されて
いることにより、上からの軽い圧力の付加（マー
カーを上から軽く押圧する）で、途中まで埋め戻
された土中に当該マーカーの下面がくい込んで仮
固定されるので、その後の土砂の埋め戻しの際に
マーカーが移動する恐れが少なくなる。 It is clear from the description of the first embodiment that the case 4 has a shape that is resistant to rolling pressure, etc., but in addition to this, the fourth embodiment has a structure that allows temporary fixation when the marker is attached. In other words, for example, in the case of burying a gas pipe, etc., a marker is attached near the gas pipe when backfilling with excavated earth and sand.
Because the bottom surface of this marker is sloped and formed at an acute angle, applying light pressure from above (lightly pressing the marker from above) will cause the bottom surface of the marker to sink into the soil that has been partially backfilled. Since the marker is temporarily fixed in place, there is less risk of the marker moving during subsequent backfilling.
（考案の効果）
以上述べたように、本考案の地中埋設物探知用
標識体は、応動手段が、いわゆる受動型である
LC共振回路からなるため、地上からの探知用信
号のみに応動し、外部からの磁場の影響を受ける
ことがない。したがつて、高精度で探知すること
ができ、地中埋設物の埋設位置を正確に知らせる
ことができる。また、応動型であるため、能動型
である磁石とは異なり経時的劣化がない。したが
つて耐久性に優れており、長期間にわたつて標識
体としての役目を果たすことができる。(Effects of the invention) As described above, in the underground object detection marker of the invention, the response means are of the so-called passive type.
Since it consists of an LC resonant circuit, it responds only to detection signals from the ground and is not affected by external magnetic fields. Therefore, detection can be performed with high precision, and the buried position of the underground object can be accurately notified. Additionally, since it is a responsive type, it does not deteriorate over time unlike active type magnets. Therefore, it has excellent durability and can serve as a marker for a long period of time.
しかも、応動手段を収納するケースは、全体が
偏平な円環形状に形成されているから、設置箇所
に置くだけで姿勢が安定し、設置作業が極めて簡
単であり、作業能率の向上に寄与することができ
る。また、ケースは、少なくともその上面が傾斜
面又は曲面となされているから、土圧、転圧等、
垂直上方から加わる力を上面で分散させることが
できる。したがつて、上記圧力が印加されても破
損し難く、長期間にわたつて標識体としての役目
を果たすことができる等優れた効果を奏する。 Moreover, since the case that houses the response means is entirely formed in a flat annular shape, the posture is stable just by placing it at the installation location, making installation work extremely easy and contributing to improved work efficiency. be able to. In addition, since at least the upper surface of the case is an inclined or curved surface, earth pressure, rolling pressure, etc.
Forces applied from vertically above can be dispersed on the top surface. Therefore, even when the above pressure is applied, it is not easily damaged, and has excellent effects such as being able to serve as a marker for a long period of time.
図面は本考案地中埋設物探知用標識体の実施例
を示し、第１図は第１実施例の平面図、第２図は
第１図の−線拡大断面図、第３図は第１図の
−線切断端面図、第４図は第２実施例を示す
平面図、第５図は第４図の−線拡大断面図、
第６図は第３実施例を示す平面図、第７図は同正
面図、第８図は第４実施例を示す中央拡大縦断面
図、第９図は同部分切断端面図、第１０図はケー
スに対する垂直上方から加わる力の方向を説明す
る図、第１１図は共振回路を示す回路図である。
１……ループコイル、２……水晶振動子、３…
…コンデンサ、４……ケース、４０１，４０２…
…円環部、４０３……連結部、４１……ケースの
上側、４２……ケースの下側、５……樹脂。
The drawings show an embodiment of the marker for detecting underground objects according to the present invention, and FIG. 1 is a plan view of the first embodiment, FIG. 2 is an enlarged cross-sectional view taken along the - line in FIG. 4 is a plan view showing the second embodiment; FIG. 5 is an enlarged sectional view taken along the line - in FIG. 4;
Fig. 6 is a plan view showing the third embodiment, Fig. 7 is a front view thereof, Fig. 8 is an enlarged central longitudinal sectional view showing the fourth embodiment, Fig. 9 is a partially cut end view of the same, and Fig. 10. 11 is a diagram illustrating the direction of a force applied vertically to the case from above, and FIG. 11 is a circuit diagram showing a resonant circuit. 1...Loop coil, 2...Crystal oscillator, 3...
...Capacitor, 4...Case, 401,402...
... Annular part, 403 ... Connection part, 41 ... Upper side of case, 42 ... Lower side of case, 5 ... Resin.
Claims (1)
た探知信号に応動して上記地中埋設物の埋設地点
を知らせるようにした標識体において、 上記探知信号の応動手段はLC共振回路からな
るものとされ、この応動手段を収納するケース
は、全体が偏平な円環形状に形成されるとともに
少なくともその上面が傾斜面又は曲面となされた
ものであることを特徴とする地中埋設物探知用標
識体。[Scope of Claim for Utility Model Registration] In a marker that is buried near an underground object and that responds to a detection signal sent from the ground to notify the burial location of the underground object, the response to the detection signal The means is composed of an LC resonant circuit, and the case housing the response means has a flat annular shape as a whole and has at least an inclined or curved upper surface. A marker for detecting underground objects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987118397U JPH0518714Y2 (en) | 1987-07-31 | 1987-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987118397U JPH0518714Y2 (en) | 1987-07-31 | 1987-07-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6423683U JPS6423683U (en) | 1989-02-08 |
| JPH0518714Y2 true JPH0518714Y2 (en) | 1993-05-18 |
Family
ID=31362721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987118397U Expired - Lifetime JPH0518714Y2 (en) | 1987-07-31 | 1987-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0518714Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5542105B2 (en) * | 1972-03-10 | 1980-10-28 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5542105U (en) * | 1978-09-11 | 1980-03-18 | ||
| JPS59100275U (en) * | 1982-12-24 | 1984-07-06 | 富士産業株式会社 | Buried pipe detection fixture |
-
1987
- 1987-07-31 JP JP1987118397U patent/JPH0518714Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5542105B2 (en) * | 1972-03-10 | 1980-10-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6423683U (en) | 1989-02-08 |
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